OSDN Git Service

Fix: CRLF & Q-encode & softwrap breaks result.
[nkf/nkf.git] / nkf.c
diff --git a/nkf.c b/nkf.c
index 95aaf75..b35d02f 100644 (file)
--- a/nkf.c
+++ b/nkf.c
-/** Network Kanji Filter. (PDS Version)
-************************************************************************
-** Copyright (C) 1987, Fujitsu LTD. (Itaru ICHIKAWA)
-** \e$BO"Mm@h!'\e(B \e$B!J3t!KIY;NDL8&5f=j!!%=%U%H#38&!!;T@n!!;j\e(B
-** \e$B!J\e(BE-Mail Address: ichikawa@flab.fujitsu.co.jp\e$B!K\e(B
-** Copyright (C) 1996,1998
-** Copyright (C) 2002
-** \e$BO"Mm@h!'\e(B \e$BN05eBg3X>pJs9)3X2J\e(B \e$B2OLn\e(B \e$B??<#\e(B  mime/X0208 support
-** \e$B!J\e(BE-Mail Address: kono@ie.u-ryukyu.ac.jp\e$B!K\e(B
-** \e$BO"Mm@h!'\e(B COW for DOS & Win16 & Win32 & OS/2
-** \e$B!J\e(BE-Mail Address: GHG00637@niftyserve.or.p\e$B!K\e(B
-**
-**    \e$B$3$N%=!<%9$N$$$+$J$kJ#<L!$2~JQ!$=$@5$b5vBz$7$^$9!#$?$@$7!"\e(B
-**    \e$B$=$N:]$K$O!"C/$,9W8%$7$?$r<($9$3$NItJ,$r;D$9$3$H!#\e(B
-**    \e$B:FG[I[$d;(;o$NIUO?$J$I$NLd$$9g$o$;$bI,MW$"$j$^$;$s!#\e(B
-**    \e$B1DMxMxMQ$b>e5-$KH?$7$J$$HO0O$G5v2D$7$^$9!#\e(B
-**    \e$B%P%$%J%j$NG[I[$N:]$K$O\e(Bversion message\e$B$rJ]B8$9$k$3$H$r>r7o$H$7$^$9!#\e(B
-**    \e$B$3$N%W%m%0%i%`$K$D$$$F$OFC$K2?$NJ]>Z$b$7$J$$!"0-$7$+$i$:!#\e(B
-**
-**    Everyone is permitted to do anything on this program
-**    including copying, modifying, improving,
-**    as long as you don't try to pretend that you wrote it.
-**    i.e., the above copyright notice has to appear in all copies.
-**    Binary distribution requires original version messages.
-**    You don't have to ask before copying, redistribution or publishing.
-**    THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE.
-***********************************************************************/
-
-/***********************************************************************
- * \e$B8=:_!"\e(Bnkf \e$B$O\e(B SorceForge \e$B$K$F%a%s%F%J%s%9$,B3$1$i$l$F$$$^$9!#\e(B
- * http://sourceforge.jp/projects/nkf/
-***********************************************************************/
-/* $Id: nkf.c,v 1.144 2007/11/02 20:17:35 naruse Exp $ */
-#define NKF_VERSION "2.0.8"
-#define NKF_RELEASE_DATE "2007-10-11"
+/*
+ * Copyright (c) 1987, Fujitsu LTD. (Itaru ICHIKAWA).
+ * Copyright (c) 1996-2009, The nkf Project.
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any source distribution.
+ */
+#define NKF_VERSION "2.0.9"
+#define NKF_RELEASE_DATE "2009-06-23"
 #define COPY_RIGHT \
-    "Copyright (C) 1987, FUJITSU LTD. (I.Ichikawa),2000 S. Kono, COW\n" \
-    "Copyright (C) 2002-2007 Kono, Furukawa, Naruse, mastodon"
+    "Copyright (C) 1987, FUJITSU LTD. (I.Ichikawa).\n" \
+    "Copyright (C) 1996-2009, The nkf Project."
 
 #include "config.h"
+#include "nkf.h"
 #include "utf8tbl.h"
-#if (defined(__TURBOC__) || defined(_MSC_VER) || defined(LSI_C) || defined(__MINGW32__) || defined(__EMX__) || defined(__MSDOS__) || defined(__WINDOWS__) || defined(__DOS__) || defined(__OS2__)) && !defined(MSDOS)
-#define MSDOS
-#if (defined(__Win32__) || defined(_WIN32)) && !defined(__WIN32__)
-#define __WIN32__
-#endif
-#endif
-
-#ifdef PERL_XS
-#undef OVERWRITE
-#endif
-
-#ifndef PERL_XS
-#include <stdio.h>
-#endif
-
-#include <stdlib.h>
-#include <string.h>
-
-#if defined(MSDOS) || defined(__OS2__)
-#include <fcntl.h>
-#include <io.h>
-#if defined(_MSC_VER) || defined(__WATCOMC__)
-#define mktemp _mktemp
-#endif
-#endif
-
-#ifdef MSDOS
-#ifdef LSI_C
-#define setbinmode(fp) fsetbin(fp)
-#elif defined(__DJGPP__)
-#include <libc/dosio.h>
-#define setbinmode(fp) djgpp_setbinmode(fp)
-#else /* Microsoft C, Turbo C */
-#define setbinmode(fp) setmode(fileno(fp), O_BINARY)
-#endif
-#else /* UNIX */
-#define setbinmode(fp)
-#endif
-
-#if defined(__DJGPP__)
-void  djgpp_setbinmode(FILE *fp)
-{
-    /* we do not use libc's setmode(), which changes COOKED/RAW mode in device. */
-    int fd, m;
-    fd = fileno(fp);
-    m = (__file_handle_modes[fd] & (~O_TEXT)) | O_BINARY;
-    __file_handle_set(fd, m);
-}
-#endif
-
-#ifdef _IOFBF /* SysV and MSDOS, Windows */
-#define       setvbuffer(fp, buf, size)       setvbuf(fp, buf, _IOFBF, size)
-#else /* BSD */
-#define       setvbuffer(fp, buf, size)       setbuffer(fp, buf, size)
-#endif
-
-/*Borland C++ 4.5 EasyWin*/
-#if defined(__TURBOC__) && defined(_Windows) && !defined(__WIN32__) /*Easy Win */
-#define         EASYWIN
-#ifndef __WIN16__
-#define __WIN16__
-#endif
-#include <windows.h>
-#endif
-
-#ifdef OVERWRITE
-/* added by satoru@isoternet.org */
-#if defined(__EMX__)
-#include <sys/types.h>
-#endif
-#include <sys/stat.h>
-#if !defined(MSDOS) || defined(__DJGPP__) /* UNIX, djgpp */
-#include <unistd.h>
-#if defined(__WATCOMC__)
-#include <sys/utime.h>
-#else
-#include <utime.h>
-#endif
-#else /* defined(MSDOS) */
 #ifdef __WIN32__
-#ifdef __BORLANDC__ /* BCC32 */
-#include <utime.h>
-#else /* !defined(__BORLANDC__) */
-#include <sys/utime.h>
-#endif /* (__BORLANDC__) */
-#else /* !defined(__WIN32__) */
-#if defined(_MSC_VER) || defined(__MINGW32__) || defined(__WATCOMC__) || defined(__OS2__) || defined(__EMX__) || defined(__IBMC__) || defined(__IBMCPP__)  /* VC++, MinGW, Watcom, emx+gcc, IBM VAC++ */
-#include <sys/utime.h>
-#elif defined(__TURBOC__) /* BCC */
-#include <utime.h>
-#elif defined(LSI_C) /* LSI C */
-#endif /* (__WIN32__) */
-#endif
+#include <windows.h>
+#include <locale.h>
 #endif
+#if defined(__OS2__)
+# define INCL_DOS
+# define INCL_DOSERRORS
+# include <os2.h>
 #endif
+#include <assert.h>
 
-#define         FALSE   0
-#define         TRUE    1
 
 /* state of output_mode and input_mode
 
    c2           0 means ASCII
-                X0201
-                ISO8859_1
-                X0208
-                EOF      all termination
+   JIS_X_0201_1976_K
+   ISO_8859_1
+   JIS_X_0208
+   EOF      all termination
    c1           32bit data
 
  */
 
-#define         ASCII           0
-#define         X0208           1
-#define         X0201           2
-#define         ISO8859_1       8
-#define         NO_X0201        3
-#define         X0212      0x2844
-#define         X0213_1    0x284F
-#define         X0213_2    0x2850
-
-/* Input Assumption */
-
-#define         JIS_INPUT       4
-#define         EUC_INPUT      16
-#define         SJIS_INPUT      5
-#define         LATIN1_INPUT    6
-#define         FIXED_MIME      7
-#define         STRICT_MIME     8
-
 /* MIME ENCODE */
 
-#define                ISO2022JP       9
-#define        JAPANESE_EUC   10
-#define                SHIFT_JIS      11
-
-#define                UTF8           12
-#define                UTF8_INPUT     13
-#define                UTF16_INPUT    1015
-#define                UTF32_INPUT    1017
+#define         FIXED_MIME      7
+#define         STRICT_MIME     8
 
 /* byte order */
-
-#define                ENDIAN_BIG      1234
-#define                ENDIAN_LITTLE   4321
-#define                ENDIAN_2143     2143
-#define                ENDIAN_3412     3412
-
-#define         WISH_TRUE      15
+enum byte_order {
+    ENDIAN_BIG    = 1,
+    ENDIAN_LITTLE = 2,
+    ENDIAN_2143   = 3,
+    ENDIAN_3412   = 4
+};
 
 /* ASCII CODE */
 
@@ -195,17 +73,206 @@ void  djgpp_setbinmode(FILE *fp)
 #define         CR      0x0d
 #define         ESC     0x1b
 #define         SP      0x20
-#define         AT      0x40
-#define         SSP     0xa0
 #define         DEL     0x7f
 #define         SI      0x0f
 #define         SO      0x0e
-#define         SSO     0x8e
+#define         SS2     0x8e
 #define         SS3     0x8f
 #define         CRLF    0x0D0A
 
+
+/* encodings */
+
+enum nkf_encodings {
+    ASCII,
+    ISO_8859_1,
+    ISO_2022_JP,
+    CP50220,
+    CP50221,
+    CP50222,
+    ISO_2022_JP_1,
+    ISO_2022_JP_3,
+    ISO_2022_JP_2004,
+    SHIFT_JIS,
+    WINDOWS_31J,
+    CP10001,
+    EUC_JP,
+    EUCJP_NKF,
+    CP51932,
+    EUCJP_MS,
+    EUCJP_ASCII,
+    SHIFT_JISX0213,
+    SHIFT_JIS_2004,
+    EUC_JISX0213,
+    EUC_JIS_2004,
+    UTF_8,
+    UTF_8N,
+    UTF_8_BOM,
+    UTF8_MAC,
+    UTF_16,
+    UTF_16BE,
+    UTF_16BE_BOM,
+    UTF_16LE,
+    UTF_16LE_BOM,
+    UTF_32,
+    UTF_32BE,
+    UTF_32BE_BOM,
+    UTF_32LE,
+    UTF_32LE_BOM,
+    BINARY,
+    NKF_ENCODING_TABLE_SIZE,
+    JIS_X_0201_1976_K = 0x1013, /* I */ /* JIS C 6220-1969 */
+    /* JIS_X_0201_1976_R = 0x1014, */ /* J */ /* JIS C 6220-1969 */
+    /* JIS_X_0208_1978   = 0x1040, */ /* @ */ /* JIS C 6226-1978 */
+    /* JIS_X_0208_1983   = 0x1087, */ /* B */ /* JIS C 6226-1983 */
+    JIS_X_0208        = 0x1168, /* @B */
+    JIS_X_0212        = 0x1159, /* D */
+    /* JIS_X_0213_2000_1 = 0x1228, */ /* O */
+    JIS_X_0213_2 = 0x1229, /* P */
+    JIS_X_0213_1 = 0x1233 /* Q */
+};
+
+static nkf_char s_iconv(nkf_char c2, nkf_char c1, nkf_char c0);
+static nkf_char e_iconv(nkf_char c2, nkf_char c1, nkf_char c0);
+static nkf_char w_iconv(nkf_char c2, nkf_char c1, nkf_char c0);
+static nkf_char w_iconv16(nkf_char c2, nkf_char c1, nkf_char c0);
+static nkf_char w_iconv32(nkf_char c2, nkf_char c1, nkf_char c0);
+static void j_oconv(nkf_char c2, nkf_char c1);
+static void s_oconv(nkf_char c2, nkf_char c1);
+static void e_oconv(nkf_char c2, nkf_char c1);
+static void w_oconv(nkf_char c2, nkf_char c1);
+static void w_oconv16(nkf_char c2, nkf_char c1);
+static void w_oconv32(nkf_char c2, nkf_char c1);
+
+typedef struct {
+    const char *name;
+    nkf_char (*iconv)(nkf_char c2, nkf_char c1, nkf_char c0);
+    void (*oconv)(nkf_char c2, nkf_char c1);
+} nkf_native_encoding;
+
+nkf_native_encoding NkfEncodingASCII =         { "ASCII", e_iconv, e_oconv };
+nkf_native_encoding NkfEncodingISO_2022_JP =   { "ISO-2022-JP", e_iconv, j_oconv };
+nkf_native_encoding NkfEncodingShift_JIS =     { "Shift_JIS", s_iconv, s_oconv };
+nkf_native_encoding NkfEncodingEUC_JP =                { "EUC-JP", e_iconv, e_oconv };
+nkf_native_encoding NkfEncodingUTF_8 =         { "UTF-8", w_iconv, w_oconv };
+nkf_native_encoding NkfEncodingUTF_16 =                { "UTF-16", w_iconv16, w_oconv16 };
+nkf_native_encoding NkfEncodingUTF_32 =                { "UTF-32", w_iconv32, w_oconv32 };
+
+typedef struct {
+    const int id;
+    const char *name;
+    const nkf_native_encoding *base_encoding;
+} nkf_encoding;
+
+nkf_encoding nkf_encoding_table[] = {
+    {ASCII,            "US-ASCII",             &NkfEncodingASCII},
+    {ISO_8859_1,       "ISO-8859-1",           &NkfEncodingASCII},
+    {ISO_2022_JP,      "ISO-2022-JP",          &NkfEncodingISO_2022_JP},
+    {CP50220,          "CP50220",              &NkfEncodingISO_2022_JP},
+    {CP50221,          "CP50221",              &NkfEncodingISO_2022_JP},
+    {CP50222,          "CP50222",              &NkfEncodingISO_2022_JP},
+    {ISO_2022_JP_1,    "ISO-2022-JP-1",        &NkfEncodingISO_2022_JP},
+    {ISO_2022_JP_3,    "ISO-2022-JP-3",        &NkfEncodingISO_2022_JP},
+    {ISO_2022_JP_2004, "ISO-2022-JP-2004",     &NkfEncodingISO_2022_JP},
+    {SHIFT_JIS,                "Shift_JIS",            &NkfEncodingShift_JIS},
+    {WINDOWS_31J,      "Windows-31J",          &NkfEncodingShift_JIS},
+    {CP10001,          "CP10001",              &NkfEncodingShift_JIS},
+    {EUC_JP,           "EUC-JP",               &NkfEncodingEUC_JP},
+    {EUCJP_NKF,                "eucJP-nkf",            &NkfEncodingEUC_JP},
+    {CP51932,          "CP51932",              &NkfEncodingEUC_JP},
+    {EUCJP_MS,         "eucJP-MS",             &NkfEncodingEUC_JP},
+    {EUCJP_ASCII,      "eucJP-ASCII",          &NkfEncodingEUC_JP},
+    {SHIFT_JISX0213,   "Shift_JISX0213",       &NkfEncodingShift_JIS},
+    {SHIFT_JIS_2004,   "Shift_JIS-2004",       &NkfEncodingShift_JIS},
+    {EUC_JISX0213,     "EUC-JISX0213",         &NkfEncodingEUC_JP},
+    {EUC_JIS_2004,     "EUC-JIS-2004",         &NkfEncodingEUC_JP},
+    {UTF_8,            "UTF-8",                &NkfEncodingUTF_8},
+    {UTF_8N,           "UTF-8N",               &NkfEncodingUTF_8},
+    {UTF_8_BOM,                "UTF-8-BOM",            &NkfEncodingUTF_8},
+    {UTF8_MAC,         "UTF8-MAC",             &NkfEncodingUTF_8},
+    {UTF_16,           "UTF-16",               &NkfEncodingUTF_16},
+    {UTF_16BE,         "UTF-16BE",             &NkfEncodingUTF_16},
+    {UTF_16BE_BOM,     "UTF-16BE-BOM",         &NkfEncodingUTF_16},
+    {UTF_16LE,         "UTF-16LE",             &NkfEncodingUTF_16},
+    {UTF_16LE_BOM,     "UTF-16LE-BOM",         &NkfEncodingUTF_16},
+    {UTF_32,           "UTF-32",               &NkfEncodingUTF_32},
+    {UTF_32BE,         "UTF-32BE",             &NkfEncodingUTF_32},
+    {UTF_32BE_BOM,     "UTF-32BE-BOM",         &NkfEncodingUTF_32},
+    {UTF_32LE,         "UTF-32LE",             &NkfEncodingUTF_32},
+    {UTF_32LE_BOM,     "UTF-32LE-BOM",         &NkfEncodingUTF_32},
+    {BINARY,           "BINARY",               &NkfEncodingASCII},
+    {-1,               NULL,                   NULL}
+};
+
+struct {
+    const char *name;
+    const int id;
+} encoding_name_to_id_table[] = {
+    {"US-ASCII",               ASCII},
+    {"ASCII",                  ASCII},
+    {"ISO-2022-JP",            ISO_2022_JP},
+    {"ISO2022JP-CP932",                CP50220},
+    {"CP50220",                        CP50220},
+    {"CP50221",                        CP50221},
+    {"CSISO2022JP",            CP50221},
+    {"CP50222",                        CP50222},
+    {"ISO-2022-JP-1",          ISO_2022_JP_1},
+    {"ISO-2022-JP-3",          ISO_2022_JP_3},
+    {"ISO-2022-JP-2004",       ISO_2022_JP_2004},
+    {"SHIFT_JIS",              SHIFT_JIS},
+    {"SJIS",                   SHIFT_JIS},
+    {"WINDOWS-31J",            WINDOWS_31J},
+    {"CSWINDOWS31J",           WINDOWS_31J},
+    {"CP932",                  WINDOWS_31J},
+    {"MS932",                  WINDOWS_31J},
+    {"CP10001",                        CP10001},
+    {"EUCJP",                  EUC_JP},
+    {"EUC-JP",                 EUC_JP},
+    {"EUCJP-NKF",              EUCJP_NKF},
+    {"CP51932",                        CP51932},
+    {"EUC-JP-MS",              EUCJP_MS},
+    {"EUCJP-MS",               EUCJP_MS},
+    {"EUCJPMS",                        EUCJP_MS},
+    {"EUC-JP-ASCII",           EUCJP_ASCII},
+    {"EUCJP-ASCII",            EUCJP_ASCII},
+    {"SHIFT_JISX0213",         SHIFT_JISX0213},
+    {"SHIFT_JIS-2004",         SHIFT_JIS_2004},
+    {"EUC-JISX0213",           EUC_JISX0213},
+    {"EUC-JIS-2004",           EUC_JIS_2004},
+    {"UTF-8",                  UTF_8},
+    {"UTF-8N",                 UTF_8N},
+    {"UTF-8-BOM",              UTF_8_BOM},
+    {"UTF8-MAC",               UTF8_MAC},
+    {"UTF-8-MAC",              UTF8_MAC},
+    {"UTF-16",                 UTF_16},
+    {"UTF-16BE",               UTF_16BE},
+    {"UTF-16BE-BOM",           UTF_16BE_BOM},
+    {"UTF-16LE",               UTF_16LE},
+    {"UTF-16LE-BOM",           UTF_16LE_BOM},
+    {"UTF-32",                 UTF_32},
+    {"UTF-32BE",               UTF_32BE},
+    {"UTF-32BE-BOM",           UTF_32BE_BOM},
+    {"UTF-32LE",               UTF_32LE},
+    {"UTF-32LE-BOM",           UTF_32LE_BOM},
+    {"BINARY",                 BINARY},
+    {NULL,                     -1}
+};
+
+#if defined(DEFAULT_CODE_JIS)
+#define            DEFAULT_ENCIDX ISO_2022_JP
+#elif defined(DEFAULT_CODE_SJIS)
+#define            DEFAULT_ENCIDX SHIFT_JIS
+#elif defined(DEFAULT_CODE_WINDOWS_31J)
+#define            DEFAULT_ENCIDX WINDOWS_31J
+#elif defined(DEFAULT_CODE_EUC)
+#define            DEFAULT_ENCIDX EUC_JP
+#elif defined(DEFAULT_CODE_UTF8)
+#define            DEFAULT_ENCIDX UTF_8
+#endif
+
+
 #define                is_alnum(c)  \
-            (('a'<=c && c<='z')||('A'<= c && c<='Z')||('0'<=c && c<='9'))
+    (('a'<=c && c<='z')||('A'<= c && c<='Z')||('0'<=c && c<='9'))
 
 /* I don't trust portablity of toupper */
 #define nkf_toupper(c)  (('a'<=c && c<='z')?(c-('a'-'A')):c)
@@ -219,19 +286,16 @@ void  djgpp_setbinmode(FILE *fp)
 #define nkf_isprint(c) (SP<=c && c<='~')
 #define nkf_isgraph(c) ('!'<=c && c<='~')
 #define hex2bin(c) (('0'<=c&&c<='9') ? (c-'0') : \
-                    ('A'<=c&&c<='F') ? (c-'A'+10) : \
-                    ('a'<=c&&c<='f') ? (c-'a'+10) : 0)
+                   ('A'<=c&&c<='F') ? (c-'A'+10) : \
+                   ('a'<=c&&c<='f') ? (c-'a'+10) : 0)
 #define bin2hex(c) ("0123456789ABCDEF"[c&15])
 #define is_eucg3(c2) (((unsigned short)c2 >> 8) == SS3)
 #define nkf_noescape_mime(c) ((c == CR) || (c == LF) || \
-    ((c > SP) && (c < DEL) && (c != '?') && (c != '=') && (c != '_') \
-     && (c != '.') && (c != 0x22)))
+                             ((c > SP) && (c < DEL) && (c != '?') && (c != '=') && (c != '_') \
+                              && (c != '(') && (c != ')') && (c != '.') && (c != 0x22)))
 
-#define CP932_TABLE_BEGIN 0xFA
-#define CP932_TABLE_END   0xFC
-#define CP932INV_TABLE_BEGIN 0xED
-#define CP932INV_TABLE_END   0xEE
 #define is_ibmext_in_sjis(c2) (CP932_TABLE_BEGIN <= c2 && c2 <= CP932_TABLE_END)
+#define nkf_byte_jisx0201_katakana_p(c) (SP <= c && c <= 0x5F)
 
 #define         HOLD_SIZE       1024
 #if defined(INT_IS_SHORT)
@@ -243,23 +307,11 @@ void  djgpp_setbinmode(FILE *fp)
 #define         DEFAULT_J       'B'
 #define         DEFAULT_R       'B'
 
-#define         SJ0162  0x00e1          /* 01 - 62 ku offset */
-#define         SJ6394  0x0161          /* 63 - 94 ku offset */
 
-#define         RANGE_NUM_MAX   18
 #define         GETA1   0x22
 #define         GETA2   0x2e
 
 
-#if defined(UTF8_OUTPUT_ENABLE) || defined(UTF8_INPUT_ENABLE)
-#define sizeof_euc_to_utf8_1byte 94
-#define sizeof_euc_to_utf8_2bytes 94
-#define sizeof_utf8_to_euc_C2 64
-#define sizeof_utf8_to_euc_E5B8 64
-#define sizeof_utf8_to_euc_2bytes 112
-#define sizeof_utf8_to_euc_3bytes 16
-#endif
-
 /* MIME preprocessor */
 
 #ifdef EASYWIN /*Easy Win */
@@ -267,7 +319,7 @@ extern POINT _BufferSize;
 #endif
 
 struct input_code{
-    char *name;
+    const char *name;
     nkf_char stat;
     nkf_char score;
     nkf_char index;
@@ -277,22 +329,10 @@ struct input_code{
     int _file_stat;
 };
 
-static char *input_codename = NULL; /* NULL: unestablished, "": BINARY */
+static const char *input_codename = NULL; /* NULL: unestablished, "": BINARY */
+static nkf_encoding *input_encoding = NULL;
+static nkf_encoding *output_encoding = NULL;
 
-#ifndef PERL_XS
-static const char *CopyRight = COPY_RIGHT;
-#endif
-#if !defined(PERL_XS) && !defined(WIN32DLL)
-static  nkf_char     noconvert(FILE *f);
-#endif
-static  void    module_connection(void);
-static  nkf_char     kanji_convert(FILE *f);
-static  nkf_char     h_conv(FILE *f,nkf_char c2,nkf_char c1);
-static  nkf_char     push_hold_buf(nkf_char c2);
-static  void    set_iconv(nkf_char f, nkf_char (*iconv_func)(nkf_char c2,nkf_char c1,nkf_char c0));
-static  nkf_char     s_iconv(nkf_char c2,nkf_char c1,nkf_char c0);
-static  nkf_char     s2e_conv(nkf_char c2, nkf_char c1, nkf_char *p2, nkf_char *p1);
-static  nkf_char     e_iconv(nkf_char c2,nkf_char c1,nkf_char c0);
 #if defined(UTF8_INPUT_ENABLE) || defined(UTF8_OUTPUT_ENABLE)
 /* UCS Mapping
  * 0: Shift_JIS, eucJP-ascii
@@ -313,48 +353,13 @@ static  int     no_cp932ext_f = FALSE;
 static  int     no_best_fit_chars_f = FALSE;
 static  int     input_endian = ENDIAN_BIG;
 static  nkf_char     unicode_subchar = '?'; /* the regular substitution character */
-static  void    nkf_each_char_to_hex(void (*f)(nkf_char c2,nkf_char c1), nkf_char c);
-static  void    encode_fallback_html(nkf_char c);
-static  void    encode_fallback_xml(nkf_char c);
-static  void    encode_fallback_java(nkf_char c);
-static  void    encode_fallback_perl(nkf_char c);
-static  void    encode_fallback_subchar(nkf_char c);
 static  void    (*encode_fallback)(nkf_char c) = NULL;
-static  nkf_char     w2e_conv(nkf_char c2,nkf_char c1,nkf_char c0,nkf_char *p2,nkf_char *p1);
-static  nkf_char     w_iconv(nkf_char c2,nkf_char c1,nkf_char c0);
-static  nkf_char     w_iconv16(nkf_char c2,nkf_char c1,nkf_char c0);
-static  nkf_char     w_iconv32(nkf_char c2,nkf_char c1,nkf_char c0);
-static  nkf_char       unicode_to_jis_common(nkf_char c2,nkf_char c1,nkf_char c0,nkf_char *p2,nkf_char *p1);
-static  nkf_char       w_iconv_common(nkf_char c1,nkf_char c0,const unsigned short *const *pp,nkf_char psize,nkf_char *p2,nkf_char *p1);
-static  void    w16w_conv(nkf_char val, nkf_char *p2, nkf_char *p1, nkf_char *p0);
-static  nkf_char     ww16_conv(nkf_char c2, nkf_char c1, nkf_char c0);
-static  nkf_char     w16e_conv(nkf_char val,nkf_char *p2,nkf_char *p1);
 static  void    w_status(struct input_code *, nkf_char);
 #endif
 #ifdef UTF8_OUTPUT_ENABLE
 static  int     output_bom_f = FALSE;
 static  int     output_endian = ENDIAN_BIG;
-static  nkf_char     e2w_conv(nkf_char c2,nkf_char c1);
-static  void    w_oconv(nkf_char c2,nkf_char c1);
-static  void    w_oconv16(nkf_char c2,nkf_char c1);
-static  void    w_oconv32(nkf_char c2,nkf_char c1);
-#endif
-static  void    e_oconv(nkf_char c2,nkf_char c1);
-static  nkf_char     e2s_conv(nkf_char c2, nkf_char c1, nkf_char *p2, nkf_char *p1);
-static  void    s_oconv(nkf_char c2,nkf_char c1);
-static  void    j_oconv(nkf_char c2,nkf_char c1);
-static  void    fold_conv(nkf_char c2,nkf_char c1);
-static  void    nl_conv(nkf_char c2,nkf_char c1);
-static  void    z_conv(nkf_char c2,nkf_char c1);
-static  void    rot_conv(nkf_char c2,nkf_char c1);
-static  void    hira_conv(nkf_char c2,nkf_char c1);
-static  void    base64_conv(nkf_char c2,nkf_char c1);
-static  void    iso2022jp_check_conv(nkf_char c2,nkf_char c1);
-static  void    no_connection(nkf_char c2,nkf_char c1);
-static  nkf_char     no_connection2(nkf_char c2,nkf_char c1,nkf_char c0);
-
-static  void    code_score(struct input_code *ptr);
-static  void    code_status(nkf_char c);
+#endif
 
 static  void    std_putc(nkf_char c);
 static  nkf_char     std_getc(FILE *f);
@@ -363,30 +368,9 @@ static  nkf_char     std_ungetc(nkf_char c,FILE *f);
 static  nkf_char     broken_getc(FILE *f);
 static  nkf_char     broken_ungetc(nkf_char c,FILE *f);
 
-static  nkf_char     mime_begin(FILE *f);
 static  nkf_char     mime_getc(FILE *f);
-static  nkf_char     mime_ungetc(nkf_char c,FILE *f);
-
-static  void    switch_mime_getc(void);
-static  void    unswitch_mime_getc(void);
-static  nkf_char     mime_begin_strict(FILE *f);
-static  nkf_char     mime_getc_buf(FILE *f);
-static  nkf_char     mime_ungetc_buf(nkf_char c,FILE *f);
-static  nkf_char     mime_integrity(FILE *f,const unsigned char *p);
-
-static  nkf_char     base64decode(nkf_char c);
-static  void    mime_prechar(nkf_char c2, nkf_char c1);
-static  void    mime_putc(nkf_char c);
-static  void    open_mime(nkf_char c);
-static  void    close_mime(void);
-static  void    eof_mime(void);
-static  void    mimeout_addchar(nkf_char c);
-#ifndef PERL_XS
-static  void    usage(void);
-static  void    version(void);
-#endif
-static  void    options(unsigned char *c);
-static  void    reinit(void);
+
+static void mime_putc(nkf_char c);
 
 /* buffers */
 
@@ -394,19 +378,6 @@ static  void    reinit(void);
 static unsigned char   stdibuf[IOBUF_SIZE];
 static unsigned char   stdobuf[IOBUF_SIZE];
 #endif
-static unsigned char   hold_buf[HOLD_SIZE*2];
-static int             hold_count = 0;
-
-/* MIME preprocessor fifo */
-
-#define MIME_BUF_SIZE   (1024)    /* 2^n ring buffer */
-#define MIME_BUF_MASK   (MIME_BUF_SIZE-1)
-#define Fifo(n)         mime_buf[(n)&MIME_BUF_MASK]
-static unsigned char           mime_buf[MIME_BUF_SIZE];
-static unsigned int            mime_top = 0;
-static unsigned int            mime_last = 0;  /* decoded */
-static unsigned int            mime_input = 0; /* undecoded */
-static nkf_char (*mime_iconv_back)(nkf_char c2,nkf_char c1,nkf_char c0) = NULL;
 
 /* flags */
 static int             unbuf_f = FALSE;
@@ -415,62 +386,48 @@ static int             nop_f = FALSE;
 static int             binmode_f = TRUE;       /* binary mode */
 static int             rot_f = FALSE;          /* rot14/43 mode */
 static int             hira_f = FALSE;          /* hira/kata henkan */
-static int             input_f = FALSE;        /* non fixed input code  */
 static int             alpha_f = FALSE;        /* convert JIx0208 alphbet to ASCII */
-static int             mime_f = STRICT_MIME;   /* convert MIME B base64 or Q */
+static int             mime_f = MIME_DECODE_DEFAULT;   /* convert MIME B base64 or Q */
 static int             mime_decode_f = FALSE;  /* mime decode is explicitly on */
 static int             mimebuf_f = FALSE;      /* MIME buffered input */
 static int             broken_f = FALSE;       /* convert ESC-less broken JIS */
 static int             iso8859_f = FALSE;      /* ISO8859 through */
 static int             mimeout_f = FALSE;       /* base64 mode */
-#if defined(MSDOS) || defined(__OS2__)
-static int             x0201_f = TRUE;         /* Assume JISX0201 kana */
-#else
-static int             x0201_f = NO_X0201;     /* Assume NO JISX0201 */
-#endif
-static int             iso2022jp_f = FALSE;    /* convert ISO-2022-JP */
+static int             x0201_f = X0201_DEFAULT; /* convert JIS X 0201 */
+static int             iso2022jp_f = FALSE;    /* replace non ISO-2022-JP with GETA */
 
 #ifdef UNICODE_NORMALIZATION
 static int nfc_f = FALSE;
 static nkf_char (*i_nfc_getc)(FILE *) = std_getc; /* input of ugetc */
 static nkf_char (*i_nfc_ungetc)(nkf_char c ,FILE *f) = std_ungetc;
-static nkf_char nfc_getc(FILE *f);
-static nkf_char nfc_ungetc(nkf_char c,FILE *f);
 #endif
 
 #ifdef INPUT_OPTION
 static int cap_f = FALSE;
 static nkf_char (*i_cgetc)(FILE *) = std_getc; /* input of cgetc */
 static nkf_char (*i_cungetc)(nkf_char c ,FILE *f) = std_ungetc;
-static nkf_char cap_getc(FILE *f);
-static nkf_char cap_ungetc(nkf_char c,FILE *f);
 
 static int url_f = FALSE;
 static nkf_char (*i_ugetc)(FILE *) = std_getc; /* input of ugetc */
 static nkf_char (*i_uungetc)(nkf_char c ,FILE *f) = std_ungetc;
-static nkf_char url_getc(FILE *f);
-static nkf_char url_ungetc(nkf_char c,FILE *f);
 #endif
 
-#if defined(INT_IS_SHORT)
-#define NKF_INT32_C(n)   (n##L)
-#else
-#define NKF_INT32_C(n)   (n)
-#endif
-#define PREFIX_EUCG3   NKF_INT32_C(0x8F00)
-#define CLASS_MASK     NKF_INT32_C(0xFF000000)
-#define CLASS_UNICODE  NKF_INT32_C(0x01000000)
-#define VALUE_MASK     NKF_INT32_C(0x00FFFFFF)
-#define UNICODE_MAX    NKF_INT32_C(0x0010FFFF)
-#define is_unicode_capsule(c) ((c & CLASS_MASK) == CLASS_UNICODE)
-#define is_unicode_bmp(c) ((c & VALUE_MASK) <= NKF_INT32_C(0xFFFF))
+#define PREFIX_EUCG3    NKF_INT32_C(0x8F00)
+#define CLASS_MASK      NKF_INT32_C(0xFF000000)
+#define CLASS_UNICODE   NKF_INT32_C(0x01000000)
+#define VALUE_MASK      NKF_INT32_C(0x00FFFFFF)
+#define UNICODE_BMP_MAX NKF_INT32_C(0x0000FFFF)
+#define UNICODE_MAX     NKF_INT32_C(0x0010FFFF)
+#define nkf_char_euc3_new(c) ((c) | PREFIX_EUCG3)
+#define nkf_char_unicode_new(c) ((c) | CLASS_UNICODE)
+#define nkf_char_unicode_p(c) ((c & CLASS_MASK) == CLASS_UNICODE)
+#define nkf_char_unicode_bmp_p(c) ((c & VALUE_MASK) <= UNICODE_BMP_MAX)
+#define nkf_char_unicode_value_p(c) ((c & VALUE_MASK) <= UNICODE_MAX)
 
 #ifdef NUMCHAR_OPTION
 static int numchar_f = FALSE;
 static nkf_char (*i_ngetc)(FILE *) = std_getc; /* input of ugetc */
 static nkf_char (*i_nungetc)(nkf_char c ,FILE *f) = std_ungetc;
-static nkf_char numchar_getc(FILE *f);
-static nkf_char numchar_ungetc(nkf_char c,FILE *f);
 #endif
 
 #ifdef CHECK_OPTION
@@ -482,10 +439,7 @@ static nkf_char (*iconv_for_check)(nkf_char c2,nkf_char c1,nkf_char c0) = 0;
 #endif
 
 static int guess_f = 0; /* 0: OFF, 1: ON, 2: VERBOSE */
-#if !defined PERL_XS
-static  void    print_guessed_code(char *filename);
-#endif
-static  void    set_input_codename(char *codename);
+static  void    set_input_codename(const char *codename);
 
 #ifdef EXEC_IO
 static int exec_f = 0;
@@ -501,23 +455,11 @@ static int cp932inv_f = TRUE;
 /* static nkf_char cp932_conv(nkf_char c2, nkf_char c1); */
 #endif /* SHIFTJIS_CP932 */
 
-#ifdef X0212_ENABLE
 static int x0212_f = FALSE;
-static nkf_char x0212_shift(nkf_char c);
-static nkf_char x0212_unshift(nkf_char c);
-#endif
 static int x0213_f = FALSE;
 
 static unsigned char prefix_table[256];
 
-static void set_code_score(struct input_code *ptr, nkf_char score);
-static void clr_code_score(struct input_code *ptr, nkf_char score);
-static void status_disable(struct input_code *ptr);
-static void status_push_ch(struct input_code *ptr, nkf_char c);
-static void status_clear(struct input_code *ptr);
-static void status_reset(struct input_code *ptr);
-static void status_reinit(struct input_code *ptr);
-static void status_check(struct input_code *ptr, nkf_char c);
 static void e_status(struct input_code *, nkf_char);
 static void s_status(struct input_code *, nkf_char);
 
@@ -526,13 +468,13 @@ struct input_code input_code_list[] = {
     {"Shift_JIS", 0, 0, 0, {0, 0, 0}, s_status, s_iconv, 0},
 #ifdef UTF8_INPUT_ENABLE
     {"UTF-8",     0, 0, 0, {0, 0, 0}, w_status, w_iconv, 0},
-    {"UTF-16",    0, 0, 0, {0, 0, 0},     NULL, w_iconv16, 0},
-    {"UTF-32",    0, 0, 0, {0, 0, 0},     NULL, w_iconv32, 0},
+    {"UTF-16",     0, 0, 0, {0, 0, 0}, NULL, w_iconv16, 0},
+    {"UTF-32",     0, 0, 0, {0, 0, 0}, NULL, w_iconv32, 0},
 #endif
     {0}
 };
 
-static int              mimeout_mode = 0;
+static int              mimeout_mode = 0; /* 0, -1, 'Q', 'B', 1, 2 */
 static int              base64_count = 0;
 
 /* X0208 -> ASCII converter */
@@ -555,31 +497,28 @@ static unsigned char   ascii_intro = DEFAULT_R;
 
 static int             fold_margin  = FOLD_MARGIN;
 
-/* converters */
+/* process default */
 
-#ifdef DEFAULT_CODE_JIS
-#   define  DEFAULT_CONV j_oconv
-#endif
-#ifdef DEFAULT_CODE_SJIS
-#   define  DEFAULT_CONV s_oconv
-#endif
-#ifdef DEFAULT_CODE_EUC
-#   define  DEFAULT_CONV e_oconv
-#endif
-#ifdef DEFAULT_CODE_UTF8
-#   define  DEFAULT_CONV w_oconv
-#endif
+static nkf_char
+no_connection2(nkf_char c2, nkf_char c1, nkf_char c0)
+{
+    fprintf(stderr,"nkf internal module connection failure.\n");
+    exit(EXIT_FAILURE);
+    return 0; /* LINT */
+}
 
-/* process default */
-static void (*output_conv)(nkf_char c2,nkf_char c1) = DEFAULT_CONV;
+static void
+no_connection(nkf_char c2, nkf_char c1)
+{
+    no_connection2(c2,c1,0);
+}
 
-static void (*oconv)(nkf_char c2,nkf_char c1) = no_connection;
-/* s_iconv or oconv */
 static nkf_char (*iconv)(nkf_char c2,nkf_char c1,nkf_char c0) = no_connection2;
+static void (*oconv)(nkf_char c2,nkf_char c1) = no_connection;
 
 static void (*o_zconv)(nkf_char c2,nkf_char c1) = no_connection;
 static void (*o_fconv)(nkf_char c2,nkf_char c1) = no_connection;
-static void (*o_nlconv)(nkf_char c2,nkf_char c1) = no_connection;
+static void (*o_eol_conv)(nkf_char c2,nkf_char c1) = no_connection;
 static void (*o_rot_conv)(nkf_char c2,nkf_char c1) = no_connection;
 static void (*o_hira_conv)(nkf_char c2,nkf_char c1) = no_connection;
 static void (*o_base64conv)(nkf_char c2,nkf_char c1) = no_connection;
@@ -605,9 +544,8 @@ static  nkf_char    (*i_mgetc_buf)(FILE *) = std_getc; /* input of mgetc_buf */
 static  nkf_char    (*i_mungetc_buf)(nkf_char c,FILE *f) = std_ungetc;
 
 /* Global states */
-static int output_mode = ASCII,    /* output kanji mode */
-           input_mode =  ASCII,    /* input kanji mode */
-           shift_mode =  FALSE;    /* TRUE shift out, or X0201  */
+static int output_mode = ASCII;    /* output kanji mode */
+static int input_mode =  ASCII;    /* input kanji mode */
 static int mime_decode_mode =   FALSE;    /* MIME mode B base64, Q hex */
 
 /* X0201 / X0208 conversion tables */
@@ -697,312 +635,358 @@ static const unsigned char fv[] = {
 
 
 
+static int option_mode = 0;
 static int             file_out_f = FALSE;
 #ifdef OVERWRITE
 static int             overwrite_f = FALSE;
 static int             preserve_time_f = FALSE;
 static int             backup_f = FALSE;
 static char            *backup_suffix = "";
-static char *get_backup_filename(const char *suffix, const char *filename);
 #endif
 
-static int nlmode_f = 0;   /* CR, LF, CRLF */
-static int input_nextline = 0; /* 0: unestablished, EOF: MIXED */
+static int eolmode_f = 0;   /* CR, LF, CRLF */
+static int input_eol = 0; /* 0: unestablished, EOF: MIXED */
 static nkf_char prev_cr = 0; /* CR or 0 */
 #ifdef EASYWIN /*Easy Win */
 static int             end_check;
 #endif /*Easy Win */
 
-#define STD_GC_BUFSIZE (256)
-nkf_char std_gc_buf[STD_GC_BUFSIZE];
-nkf_char std_gc_ndx;
+static void *
+nkf_xmalloc(size_t size)
+{
+    void *ptr;
 
-#ifdef WIN32DLL
-#include "nkf32dll.c"
-#elif defined(PERL_XS)
-#else /* WIN32DLL */
-int main(int argc, char **argv)
+    if (size == 0) size = 1;
+
+    ptr = malloc(size);
+    if (ptr == NULL) {
+       perror("can't malloc");
+       exit(EXIT_FAILURE);
+    }
+
+    return ptr;
+}
+
+static void *
+nkf_xrealloc(void *ptr, size_t size)
 {
-    FILE  *fin;
-    unsigned char  *cp;
+    if (size == 0) size = 1;
 
-    char *outfname = NULL;
-    char *origfname;
+    ptr = realloc(ptr, size);
+    if (ptr == NULL) {
+       perror("can't realloc");
+       exit(EXIT_FAILURE);
+    }
 
-#ifdef EASYWIN /*Easy Win */
-    _BufferSize.y = 400;/*Set Scroll Buffer Size*/
-#endif
+    return ptr;
+}
 
-    for (argc--,argv++; (argc > 0) && **argv == '-'; argc--, argv++) {
-        cp = (unsigned char *)*argv;
-        options(cp);
-        if (guess_f) {
-#ifdef CHECK_OPTION
-           int debug_f_back = debug_f;
-#endif
-#ifdef EXEC_IO
-           int exec_f_back = exec_f;
-#endif
-#ifdef X0212_ENABLE
-           int x0212_f_back = x0212_f;
-#endif
-#ifdef X0212_ENABLE
-           int x0213_f_back = x0213_f;
-#endif
-           int guess_f_back = guess_f;
-           reinit();
-           guess_f = guess_f_back;
-           mime_f = FALSE;
-#ifdef CHECK_OPTION
-           debug_f = debug_f_back;
-#endif
-#ifdef EXEC_IO
-            exec_f = exec_f_back;
-#endif
-#ifdef X0212_ENABLE
-           x0212_f = x0212_f_back;
+#define nkf_xfree(ptr) free(ptr)
+
+static int
+nkf_str_caseeql(const char *src, const char *target)
+{
+    int i;
+    for (i = 0; src[i] && target[i]; i++) {
+       if (nkf_toupper(src[i]) != nkf_toupper(target[i])) return FALSE;
+    }
+    if (src[i] || target[i]) return FALSE;
+    else return TRUE;
+}
+
+static nkf_encoding*
+nkf_enc_from_index(int idx)
+{
+    if (idx < 0 || NKF_ENCODING_TABLE_SIZE <= idx) {
+       return 0;
+    }
+    return &nkf_encoding_table[idx];
+}
+
+static int
+nkf_enc_find_index(const char *name)
+{
+    int i;
+    if (name[0] == 'X' && *(name+1) == '-') name += 2;
+    for (i = 0; encoding_name_to_id_table[i].id >= 0; i++) {
+       if (nkf_str_caseeql(encoding_name_to_id_table[i].name, name)) {
+           return encoding_name_to_id_table[i].id;
+       }
+    }
+    return -1;
+}
+
+static nkf_encoding*
+nkf_enc_find(const char *name)
+{
+    int idx = -1;
+    idx = nkf_enc_find_index(name);
+    if (idx < 0) return 0;
+    return nkf_enc_from_index(idx);
+}
+
+#define nkf_enc_name(enc) (enc)->name
+#define nkf_enc_to_index(enc) (enc)->id
+#define nkf_enc_to_base_encoding(enc) (enc)->base_encoding
+#define nkf_enc_to_iconv(enc) nkf_enc_to_base_encoding(enc)->iconv
+#define nkf_enc_to_oconv(enc) nkf_enc_to_base_encoding(enc)->oconv
+#define nkf_enc_asciicompat(enc) (\
+                                 nkf_enc_to_base_encoding(enc) == &NkfEncodingASCII ||\
+                                 nkf_enc_to_base_encoding(enc) == &NkfEncodingISO_2022_JP)
+#define nkf_enc_unicode_p(enc) (\
+                               nkf_enc_to_base_encoding(enc) == &NkfEncodingUTF_8 ||\
+                               nkf_enc_to_base_encoding(enc) == &NkfEncodingUTF_16 ||\
+                               nkf_enc_to_base_encoding(enc) == &NkfEncodingUTF_32)
+#define nkf_enc_cp5022x_p(enc) (\
+                               nkf_enc_to_index(enc) == CP50220 ||\
+                               nkf_enc_to_index(enc) == CP50221 ||\
+                               nkf_enc_to_index(enc) == CP50222)
+
+#ifdef DEFAULT_CODE_LOCALE
+static const char*
+nkf_locale_charmap()
+{
+#ifdef HAVE_LANGINFO_H
+    return nl_langinfo(CODESET);
+#elif defined(__WIN32__)
+    static char buf[16];
+    sprintf(buf, "CP%d", GetACP());
+    return buf;
+#elif defined(__OS2__)
+# if defined(INT_IS_SHORT)
+    /* OS/2 1.x */
+    return NULL;
+# else
+    /* OS/2 32bit */
+    static char buf[16];
+    ULONG ulCP[1], ulncp;
+    DosQueryCp(sizeof(ulCP), ulCP, &ulncp);
+    if (ulCP[0] == 932 || ulCP[0] == 943)
+        strcpy(buf, "Shift_JIS");
+    else
+        sprintf(buf, "CP%lu", ulCP[0]);
+    return buf;
+# endif
 #endif
-#ifdef X0213_ENABLE
-           x0213_f = x0213_f_back;
+    return NULL;
+}
+
+static nkf_encoding*
+nkf_locale_encoding()
+{
+    nkf_encoding *enc = 0;
+    const char *encname = nkf_locale_charmap();
+    if (encname)
+       enc = nkf_enc_find(encname);
+    return enc;
+}
+#endif /* DEFAULT_CODE_LOCALE */
+
+static nkf_encoding*
+nkf_utf8_encoding()
+{
+    return &nkf_encoding_table[UTF_8];
+}
+
+static nkf_encoding*
+nkf_default_encoding()
+{
+    nkf_encoding *enc = 0;
+#ifdef DEFAULT_CODE_LOCALE
+    enc = nkf_locale_encoding();
+#elif defined(DEFAULT_ENCIDX)
+    enc = nkf_enc_from_index(DEFAULT_ENCIDX);
+#endif
+    if (!enc) enc = nkf_utf8_encoding();
+    return enc;
+}
+
+typedef struct {
+    long capa;
+    long len;
+    nkf_char *ptr;
+} nkf_buf_t;
+
+static nkf_buf_t *
+nkf_buf_new(int length)
+{
+    nkf_buf_t *buf = nkf_xmalloc(sizeof(nkf_buf_t));
+    buf->ptr = nkf_xmalloc(length);
+    buf->capa = length;
+    buf->len = 0;
+    return buf;
+} 
+
+#if 0
+static void
+nkf_buf_dispose(nkf_buf_t *buf)
+{
+    nkf_xfree(buf->ptr);
+    nkf_xfree(buf);
+}
 #endif
+
+#define nkf_buf_length(buf) ((buf)->len)
+#define nkf_buf_empty_p(buf) ((buf)->len == 0)
+
+static unsigned char
+nkf_buf_at(nkf_buf_t *buf, int index)
+{
+    assert(index <= buf->len);
+    return buf->ptr[index];
+}
+
+static void
+nkf_buf_clear(nkf_buf_t *buf)
+{
+    buf->len = 0;
+}
+
+static void
+nkf_buf_push(nkf_buf_t *buf, nkf_char c)
+{
+    if (buf->capa <= buf->len) {
+       exit(EXIT_FAILURE);
     }
-#ifdef EXEC_IO
-        if (exec_f){
-            int fds[2], pid;
-            if (pipe(fds) < 0 || (pid = fork()) < 0){
-                abort();
-            }
-            if (pid == 0){
-                if (exec_f > 0){
-                    close(fds[0]);
-                    dup2(fds[1], 1);
-                }else{
-                    close(fds[1]);
-                    dup2(fds[0], 0);
-                }
-                execvp(argv[1], &argv[1]);
-            }
-            if (exec_f > 0){
-                close(fds[1]);
-                dup2(fds[0], 0);
-            }else{
-                close(fds[0]);
-                dup2(fds[1], 1);
-            }
-            argc = 0;
-            break;
-        }
-#endif
-    }
-    if(x0201_f == WISH_TRUE)
-         x0201_f = ((!iso2022jp_f)? TRUE : NO_X0201);
+    buf->ptr[buf->len++] = c;
+}
 
-    if (binmode_f == TRUE)
-#if defined(__OS2__) && (defined(__IBMC__) || defined(__IBMCPP__))
-    if (freopen("","wb",stdout) == NULL)
-        return (-1);
-#else
-    setbinmode(stdout);
+static unsigned char
+nkf_buf_pop(nkf_buf_t *buf)
+{
+    assert(!nkf_buf_empty_p(buf));
+    return buf->ptr[--buf->len];
+}
+
+/* Normalization Form C */
+#ifndef PERL_XS
+#ifdef WIN32DLL
+#define fprintf dllprintf
 #endif
 
-    if (unbuf_f)
-      setbuf(stdout, (char *) NULL);
-    else
-      setvbuffer(stdout, (char *) stdobuf, IOBUF_SIZE);
+static void
+version(void)
+{
+    fprintf(HELP_OUTPUT,"Network Kanji Filter Version " NKF_VERSION " (" NKF_RELEASE_DATE ") \n" COPY_RIGHT "\n");
+}
 
-    if (argc == 0) {
-      if (binmode_f == TRUE)
-#if defined(__OS2__) && (defined(__IBMC__) || defined(__IBMCPP__))
-      if (freopen("","rb",stdin) == NULL) return (-1);
+static void
+usage(void)
+{
+    fprintf(HELP_OUTPUT,
+           "Usage:  nkf -[flags] [--] [in file] .. [out file for -O flag]\n"
+#ifdef UTF8_OUTPUT_ENABLE
+           " j/s/e/w  Specify output encoding ISO-2022-JP, Shift_JIS, EUC-JP\n"
+           "          UTF options is -w[8[0],{16,32}[{B,L}[0]]]\n"
 #else
-      setbinmode(stdin);
-#endif
-      setvbuffer(stdin, (char *) stdibuf, IOBUF_SIZE);
-      if (nop_f)
-          noconvert(stdin);
-      else {
-          kanji_convert(stdin);
-          if (guess_f) print_guessed_code(NULL);
-      }
-    } else {
-      int nfiles = argc;
-       int is_argument_error = FALSE;
-      while (argc--) {
-           input_codename = NULL;
-           input_nextline = 0;
-#ifdef CHECK_OPTION
-           iconv_for_check = 0;
 #endif
-          if ((fin = fopen((origfname = *argv++), "r")) == NULL) {
-              perror(*--argv);
-               *argv++;
-               is_argument_error = TRUE;
-               continue;
-          } else {
+#ifdef UTF8_INPUT_ENABLE
+           " J/S/E/W  Specify input encoding ISO-2022-JP, Shift_JIS, EUC-JP\n"
+           "          UTF option is -W[8,[16,32][B,L]]\n"
+#else
+           " J/S/E    Specify output encoding ISO-2022-JP, Shift_JIS, EUC-JP\n"
+#endif
+           );
+    fprintf(HELP_OUTPUT,
+           " m[BQSN0] MIME decode [B:base64,Q:quoted,S:strict,N:nonstrict,0:no decode]\n"
+           " M[BQ]    MIME encode [B:base64 Q:quoted]\n"
+           " f/F      Folding: -f60 or -f or -f60-10 (fold margin 10) F preserve nl\n"
+           );
+    fprintf(HELP_OUTPUT,
+           " Z[0-4]   Default/0: Convert JISX0208 Alphabet to ASCII\n"
+           "          1: Kankaku to one space  2: to two spaces  3: HTML Entity\n"
+           "          4: JISX0208 Katakana to JISX0201 Katakana\n"
+           " X,x      Assume X0201 kana in MS-Kanji, -x preserves X0201\n"
+           );
+    fprintf(HELP_OUTPUT,
+           " O        Output to File (DEFAULT 'nkf.out')\n"
+           " L[uwm]   Line mode u:LF w:CRLF m:CR (DEFAULT noconversion)\n"
+           );
+    fprintf(HELP_OUTPUT,
+           " --ic=<encoding>        Specify the input encoding\n"
+           " --oc=<encoding>        Specify the output encoding\n"
+           " --hiragana --katakana  Hiragana/Katakana Conversion\n"
+           " --katakana-hiragana    Converts each other\n"
+           );
+    fprintf(HELP_OUTPUT,
+#ifdef INPUT_OPTION
+           " --{cap, url}-input     Convert hex after ':' or '%%'\n"
+#endif
+#ifdef NUMCHAR_OPTION
+           " --numchar-input        Convert Unicode Character Reference\n"
+#endif
+#ifdef UTF8_INPUT_ENABLE
+           " --fb-{skip, html, xml, perl, java, subchar}\n"
+           "                        Specify unassigned character's replacement\n"
+#endif
+           );
+    fprintf(HELP_OUTPUT,
 #ifdef OVERWRITE
-              int fd = 0;
-              int fd_backup = 0;
+           " --in-place[=SUF]       Overwrite original files\n"
+           " --overwrite[=SUF]      Preserve timestamp of original files\n"
 #endif
+           " -g --guess             Guess the input code\n"
+           " -v --version           Print the version\n"
+           " --help/-V              Print this help / configuration\n"
+           );
+    version();
+}
 
-/* reopen file for stdout */
-              if (file_out_f == TRUE) {
-#ifdef OVERWRITE
-                  if (overwrite_f){
-                      outfname = malloc(strlen(origfname)
-                                        + strlen(".nkftmpXXXXXX")
-                                        + 1);
-                      if (!outfname){
-                          perror(origfname);
-                          return -1;
-                      }
-                      strcpy(outfname, origfname);
-#ifdef MSDOS
-                      {
-                          int i;
-                          for (i = strlen(outfname); i; --i){
-                              if (outfname[i - 1] == '/'
-                                  || outfname[i - 1] == '\\'){
-                                  break;
-                              }
-                          }
-                          outfname[i] = '\0';
-                      }
-                      strcat(outfname, "ntXXXXXX");
-                      mktemp(outfname);
-                       fd = open(outfname, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL,
-                                S_IREAD | S_IWRITE);
+static void
+show_configuration(void)
+{
+    fprintf(HELP_OUTPUT,
+           "Summary of my nkf " NKF_VERSION " (" NKF_RELEASE_DATE ") configuration:\n"
+           "  Compile-time options:\n"
+           "    Compiled at:                 " __DATE__ " " __TIME__ "\n"
+          );
+    fprintf(HELP_OUTPUT,
+           "    Default output encoding:     "
+#ifdef DEFAULT_CODE_LOCALE
+           "LOCALE (%s)\n", nkf_enc_name(nkf_default_encoding())
+#elif defined(DEFAULT_ENCIDX)
+           "CONFIG (%s)\n", nkf_enc_name(nkf_default_encoding())
 #else
-                      strcat(outfname, ".nkftmpXXXXXX");
-                      fd = mkstemp(outfname);
-#endif
-                      if (fd < 0
-                          || (fd_backup = dup(fileno(stdout))) < 0
-                          || dup2(fd, fileno(stdout)) < 0
-                          ){
-                          perror(origfname);
-                          return -1;
-                      }
-                  }else
-#endif
-                 if(argc == 1) {
-                     outfname = *argv++;
-                     argc--;
-                 } else {
-                     outfname = "nkf.out";
-                 }
-
-                 if(freopen(outfname, "w", stdout) == NULL) {
-                     perror (outfname);
-                     return (-1);
-                 }
-                  if (binmode_f == TRUE) {
-#if defined(__OS2__) && (defined(__IBMC__) || defined(__IBMCPP__))
-                      if (freopen("","wb",stdout) == NULL)
-                           return (-1);
+           "NONE\n"
+#endif
+          );
+    fprintf(HELP_OUTPUT,
+           "    Default output end of line:  "
+#if DEFAULT_NEWLINE == CR
+           "CR"
+#elif DEFAULT_NEWLINE == CRLF
+           "CRLF"
 #else
-                      setbinmode(stdout);
+           "LF"
 #endif
-                  }
-              }
-              if (binmode_f == TRUE)
-#if defined(__OS2__) && (defined(__IBMC__) || defined(__IBMCPP__))
-                 if (freopen("","rb",fin) == NULL)
-                    return (-1);
-#else
-                 setbinmode(fin);
-#endif
-              setvbuffer(fin, (char *) stdibuf, IOBUF_SIZE);
-              if (nop_f)
-                  noconvert(fin);
-              else {
-                  char *filename = NULL;
-                  kanji_convert(fin);
-                  if (nfiles > 1) filename = origfname;
-                  if (guess_f) print_guessed_code(filename);
-              }
-              fclose(fin);
-#ifdef OVERWRITE
-              if (overwrite_f) {
-                  struct stat     sb;
-#if defined(MSDOS) && !defined(__MINGW32__) && !defined(__WIN32__) && !defined(__WATCOMC__) && !defined(__EMX__) && !defined(__OS2__) && !defined(__DJGPP__)
-                  time_t tb[2];
+           "\n"
+           "    Decode MIME encoded string:  "
+#if MIME_DECODE_DEFAULT
+           "ON"
 #else
-                  struct utimbuf  tb;
-#endif
-
-                  fflush(stdout);
-                  close(fd);
-                  if (dup2(fd_backup, fileno(stdout)) < 0){
-                      perror("dup2");
-                  }
-                  if (stat(origfname, &sb)) {
-                      fprintf(stderr, "Can't stat %s\n", origfname);
-                  }
-                  /* \e$B%Q!<%_%C%7%g%s$rI|85\e(B */
-                  if (chmod(outfname, sb.st_mode)) {
-                      fprintf(stderr, "Can't set permission %s\n", outfname);
-                  }
-
-                  /* \e$B%?%$%`%9%?%s%W$rI|85\e(B */
-                   if(preserve_time_f){
-#if defined(MSDOS) && !defined(__MINGW32__) && !defined(__WIN32__) && !defined(__WATCOMC__) && !defined(__EMX__) && !defined(__OS2__) && !defined(__DJGPP__)
-                       tb[0] = tb[1] = sb.st_mtime;
-                       if (utime(outfname, tb)) {
-                           fprintf(stderr, "Can't set timestamp %s\n", outfname);
-                       }
+           "OFF"
+#endif
+           "\n"
+           "    Convert JIS X 0201 Katakana: "
+#if X0201_DEFAULT
+           "ON"
 #else
-                       tb.actime  = sb.st_atime;
-                       tb.modtime = sb.st_mtime;
-                       if (utime(outfname, &tb)) {
-                           fprintf(stderr, "Can't set timestamp %s\n", outfname);
-                       }
+           "OFF"
 #endif
-                   }
-                   if(backup_f){
-                       char *backup_filename = get_backup_filename(backup_suffix, origfname);
-#ifdef MSDOS
-                       unlink(backup_filename);
+           "\n"
+           "    --help, --version output:    "
+#if HELP_OUTPUT_HELP_OUTPUT
+           "HELP_OUTPUT"
+#else
+           "STDOUT"
 #endif
-                       if (rename(origfname, backup_filename)) {
-                           perror(backup_filename);
-                           fprintf(stderr, "Can't rename %s to %s\n",
-                                   origfname, backup_filename);
-                       }
-                   }else{
-#ifdef MSDOS
-                       if (unlink(origfname)){
-                           perror(origfname);
-                       }
-#endif
-                   }
-                  if (rename(outfname, origfname)) {
-                      perror(origfname);
-                      fprintf(stderr, "Can't rename %s to %s\n",
-                              outfname, origfname);
-                  }
-                  free(outfname);
-              }
-#endif
-          }
-      }
-       if (is_argument_error)
-           return(-1);
-    }
-#ifdef EASYWIN /*Easy Win */
-    if (file_out_f == FALSE)
-        scanf("%d",&end_check);
-    else
-        fclose(stdout);
-#else /* for Other OS */
-    if (file_out_f == TRUE)
-        fclose(stdout);
-#endif /*Easy Win */
-    return (0);
+           "\n");
 }
-#endif /* WIN32DLL */
+#endif /*PERL_XS*/
 
 #ifdef OVERWRITE
-char *get_backup_filename(const char *suffix, const char *filename)
+static char*
+get_backup_filename(const char *suffix, const char *filename)
 {
     char *backup_filename;
     int asterisk_count = 0;
@@ -1014,12 +998,7 @@ char *get_backup_filename(const char *suffix, const char *filename)
     }
 
     if(asterisk_count){
-       backup_filename = malloc(strlen(suffix) + (asterisk_count * (filename_length - 1)) + 1);
-       if (!backup_filename){
-           perror("Can't malloc backup filename.");
-           return NULL;
-       }
-
+       backup_filename = nkf_xmalloc(strlen(suffix) + (asterisk_count * (filename_length - 1)) + 1);
        for(i = 0, j = 0; suffix[i];){
            if(suffix[i] == '*'){
                backup_filename[j] = '\0';
@@ -1032,8 +1011,8 @@ char *get_backup_filename(const char *suffix, const char *filename)
        }
        backup_filename[j] = '\0';
     }else{
-       j = strlen(suffix) + filename_length;
-       backup_filename = malloc( + 1);
+       j = filename_length + strlen(suffix);
+       backup_filename = nkf_xmalloc(j + 1);
        strcpy(backup_filename, filename);
        strcat(backup_filename, suffix);
        backup_filename[j] = '\0';
@@ -1042,6 +1021,101 @@ char *get_backup_filename(const char *suffix, const char *filename)
 }
 #endif
 
+#ifdef UTF8_INPUT_ENABLE
+static void
+nkf_each_char_to_hex(void (*f)(nkf_char c2,nkf_char c1), nkf_char c)
+{
+    int shift = 20;
+    c &= VALUE_MASK;
+    while(shift >= 0){
+       if(c >= 1<<shift){
+           while(shift >= 0){
+               (*f)(0, bin2hex(c>>shift));
+               shift -= 4;
+           }
+       }else{
+           shift -= 4;
+       }
+    }
+    return;
+}
+
+static void
+encode_fallback_html(nkf_char c)
+{
+    (*oconv)(0, '&');
+    (*oconv)(0, '#');
+    c &= VALUE_MASK;
+    if(c >= NKF_INT32_C(1000000))
+       (*oconv)(0, 0x30+(c/NKF_INT32_C(1000000))%10);
+    if(c >= NKF_INT32_C(100000))
+       (*oconv)(0, 0x30+(c/NKF_INT32_C(100000) )%10);
+    if(c >= 10000)
+       (*oconv)(0, 0x30+(c/10000  )%10);
+    if(c >= 1000)
+       (*oconv)(0, 0x30+(c/1000   )%10);
+    if(c >= 100)
+       (*oconv)(0, 0x30+(c/100    )%10);
+    if(c >= 10)
+       (*oconv)(0, 0x30+(c/10     )%10);
+    if(c >= 0)
+       (*oconv)(0, 0x30+ c         %10);
+    (*oconv)(0, ';');
+    return;
+}
+
+static void
+encode_fallback_xml(nkf_char c)
+{
+    (*oconv)(0, '&');
+    (*oconv)(0, '#');
+    (*oconv)(0, 'x');
+    nkf_each_char_to_hex(oconv, c);
+    (*oconv)(0, ';');
+    return;
+}
+
+static void
+encode_fallback_java(nkf_char c)
+{
+    (*oconv)(0, '\\');
+    c &= VALUE_MASK;
+    if(!nkf_char_unicode_bmp_p(c)){
+       (*oconv)(0, 'U');
+       (*oconv)(0, '0');
+       (*oconv)(0, '0');
+       (*oconv)(0, bin2hex(c>>20));
+       (*oconv)(0, bin2hex(c>>16));
+    }else{
+       (*oconv)(0, 'u');
+    }
+    (*oconv)(0, bin2hex(c>>12));
+    (*oconv)(0, bin2hex(c>> 8));
+    (*oconv)(0, bin2hex(c>> 4));
+    (*oconv)(0, bin2hex(c    ));
+    return;
+}
+
+static void
+encode_fallback_perl(nkf_char c)
+{
+    (*oconv)(0, '\\');
+    (*oconv)(0, 'x');
+    (*oconv)(0, '{');
+    nkf_each_char_to_hex(oconv, c);
+    (*oconv)(0, '}');
+    return;
+}
+
+static void
+encode_fallback_subchar(nkf_char c)
+{
+    c = unicode_subchar;
+    (*oconv)((c>>8)&0xFF, c&0xFF);
+    return;
+}
+#endif
+
 static const struct {
     const char *name;
     const char *alias;
@@ -1052,7 +1126,7 @@ static const struct {
     {"euc","e"},
     {"euc-input","E"},
     {"fj","jm"},
-    {"help","v"},
+    {"help",""},
     {"jis","j"},
     {"jis-input","J"},
     {"mac","sLm"},
@@ -1062,13 +1136,13 @@ static const struct {
     {"sjis","s"},
     {"sjis-input","S"},
     {"unix","eLu"},
-    {"version","V"},
+    {"version","v"},
     {"windows","sLw"},
     {"hiragana","h1"},
     {"katakana","h2"},
     {"katakana-hiragana","h3"},
     {"guess=", ""},
-    {"guess", "g"},
+    {"guess", "g2"},
     {"cp932", ""},
     {"no-cp932", ""},
 #ifdef X0212_ENABLE
@@ -1122,2131 +1196,832 @@ static const struct {
     {"prefix=", ""},
 };
 
-static int option_mode = 0;
-
-void options(unsigned char *cp)
+static void
+set_input_encoding(nkf_encoding *enc)
 {
-    nkf_char i, j;
-    unsigned char *p;
-    unsigned char *cp_back = NULL;
-    char codeset[32];
-
-    if (option_mode==1)
-       return;
-    while(*cp && *cp++!='-');
-    while (*cp || cp_back) {
-       if(!*cp){
-           cp = cp_back;
-           cp_back = NULL;
-           continue;
-       }
-       p = 0;
-        switch (*cp++) {
-        case '-':  /* literal options */
-           if (!*cp || *cp == SP) {        /* ignore the rest of arguments */
-               option_mode = 1;
-               return;
-           }
-            for (i=0;i<sizeof(long_option)/sizeof(long_option[0]);i++) {
-                p = (unsigned char *)long_option[i].name;
-                for (j=0;*p && *p != '=' && *p == cp[j];p++, j++);
-               if (*p == cp[j] || cp[j] == SP){
-                   p = &cp[j] + 1;
-                   break;
-               }
-               p = 0;
-            }
-           if (p == 0) {
-               fprintf(stderr, "unknown long option: --%s\n", cp);
-               return;
-           }
-           while(*cp && *cp != SP && cp++);
-            if (long_option[i].alias[0]){
-               cp_back = cp;
-               cp = (unsigned char *)long_option[i].alias;
-           }else{
-                if (strcmp(long_option[i].name, "ic=") == 0){
-                   for (i=0; i < 16 && SP < p[i] && p[i] < DEL; i++){
-                       codeset[i] = nkf_toupper(p[i]);
-                   }
-                   codeset[i] = 0;
-                   if(strcmp(codeset, "ISO-2022-JP") == 0){
-                       input_f = JIS_INPUT;
-                   }else if(strcmp(codeset, "X-ISO2022JP-CP932") == 0 ||
-                     strcmp(codeset, "CP50220") == 0 ||
-                     strcmp(codeset, "CP50221") == 0 ||
-                     strcmp(codeset, "CP50222") == 0){
-                       input_f = JIS_INPUT;
+    switch (nkf_enc_to_index(enc)) {
+    case ISO_8859_1:
+       iso8859_f = TRUE;
+       break;
+    case CP50220:
+    case CP50221:
+    case CP50222:
+       x0201_f = TRUE;
 #ifdef SHIFTJIS_CP932
-                       cp51932_f = TRUE;
+       cp51932_f = TRUE;
 #endif
 #ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_CP932;
-#endif
-                   }else if(strcmp(codeset, "ISO-2022-JP-1") == 0){
-                       input_f = JIS_INPUT;
-#ifdef X0212_ENABLE
-                       x0212_f = TRUE;
+       ms_ucs_map_f = UCS_MAP_CP932;
 #endif
-                   }else if(strcmp(codeset, "ISO-2022-JP-3") == 0){
-                       input_f = JIS_INPUT;
-#ifdef X0212_ENABLE
-                       x0212_f = TRUE;
-#endif
-                       x0213_f = TRUE;
-                   }else if(strcmp(codeset, "SHIFT_JIS") == 0){
-                       input_f = SJIS_INPUT;
-                   }else if(strcmp(codeset, "WINDOWS-31J") == 0 ||
-                            strcmp(codeset, "CSWINDOWS31J") == 0 ||
-                            strcmp(codeset, "CP932") == 0 ||
-                            strcmp(codeset, "MS932") == 0){
-                       input_f = SJIS_INPUT;
+       break;
+    case ISO_2022_JP_1:
+       x0212_f = TRUE;
+       break;
+    case ISO_2022_JP_3:
+       x0212_f = TRUE;
+       x0213_f = TRUE;
+       break;
+    case ISO_2022_JP_2004:
+       x0212_f = TRUE;
+       x0213_f = TRUE;
+       break;
+    case SHIFT_JIS:
+       break;
+    case WINDOWS_31J:
+       x0201_f = TRUE;
 #ifdef SHIFTJIS_CP932
-                       cp51932_f = TRUE;
+       cp51932_f = TRUE;
 #endif
 #ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_CP932;
+       ms_ucs_map_f = UCS_MAP_CP932;
 #endif
-                   }else if(strcmp(codeset, "CP10001") == 0){
-                       input_f = SJIS_INPUT;
+       break;
+       break;
+    case CP10001:
 #ifdef SHIFTJIS_CP932
-                       cp51932_f = TRUE;
+       cp51932_f = TRUE;
 #endif
 #ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_CP10001;
+       ms_ucs_map_f = UCS_MAP_CP10001;
 #endif
-                   }else if(strcmp(codeset, "EUCJP") == 0 ||
-                            strcmp(codeset, "EUC-JP") == 0){
-                       input_f = EUC_INPUT;
-                   }else if(strcmp(codeset, "CP51932") == 0){
-                       input_f = EUC_INPUT;
+       break;
+    case EUC_JP:
+       break;
+    case EUCJP_NKF:
+       break;
+    case CP51932:
+       x0201_f = TRUE;
 #ifdef SHIFTJIS_CP932
-                       cp51932_f = TRUE;
+       cp51932_f = TRUE;
 #endif
 #ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_CP932;
+       ms_ucs_map_f = UCS_MAP_CP932;
 #endif
-                   }else if(strcmp(codeset, "EUC-JP-MS") == 0 ||
-                            strcmp(codeset, "EUCJP-MS") == 0 ||
-                            strcmp(codeset, "EUCJPMS") == 0){
-                       input_f = EUC_INPUT;
+       break;
+    case EUCJP_MS:
 #ifdef SHIFTJIS_CP932
-                       cp51932_f = FALSE;
+       cp51932_f = FALSE;
 #endif
 #ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_MS;
+       ms_ucs_map_f = UCS_MAP_MS;
 #endif
-                   }else if(strcmp(codeset, "EUC-JP-ASCII") == 0 ||
-                            strcmp(codeset, "EUCJP-ASCII") == 0){
-                       input_f = EUC_INPUT;
+       break;
+    case EUCJP_ASCII:
 #ifdef SHIFTJIS_CP932
-                       cp51932_f = FALSE;
+       cp51932_f = FALSE;
 #endif
 #ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_ASCII;
+       ms_ucs_map_f = UCS_MAP_ASCII;
 #endif
-                   }else if(strcmp(codeset, "SHIFT_JISX0213") == 0 ||
-                            strcmp(codeset, "SHIFT_JIS-2004") == 0){
-                       input_f = SJIS_INPUT;
-                       x0213_f = TRUE;
+       break;
+    case SHIFT_JISX0213:
+    case SHIFT_JIS_2004:
+       x0213_f = TRUE;
 #ifdef SHIFTJIS_CP932
-                       cp51932_f = FALSE;
+       cp51932_f = FALSE;
 #endif
-                   }else if(strcmp(codeset, "EUC-JISX0213") == 0 ||
-                            strcmp(codeset, "EUC-JIS-2004") == 0){
-                       input_f = EUC_INPUT;
-                       x0213_f = TRUE;
+       break;
+    case EUC_JISX0213:
+    case EUC_JIS_2004:
+       x0213_f = TRUE;
 #ifdef SHIFTJIS_CP932
-                       cp51932_f = FALSE;
+       cp51932_f = FALSE;
 #endif
+       break;
 #ifdef UTF8_INPUT_ENABLE
-                   }else if(strcmp(codeset, "UTF-8") == 0 ||
-                            strcmp(codeset, "UTF-8N") == 0 ||
-                            strcmp(codeset, "UTF-8-BOM") == 0){
-                       input_f = UTF8_INPUT;
 #ifdef UNICODE_NORMALIZATION
-                   }else if(strcmp(codeset, "UTF8-MAC") == 0 ||
-                            strcmp(codeset, "UTF-8-MAC") == 0){
-                       input_f = UTF8_INPUT;
-                       nfc_f = TRUE;
-#endif
-                   }else if(strcmp(codeset, "UTF-16") == 0 ||
-                            strcmp(codeset, "UTF-16BE") == 0 ||
-                            strcmp(codeset, "UTF-16BE-BOM") == 0){
-                       input_f = UTF16_INPUT;
-                       input_endian = ENDIAN_BIG;
-                   }else if(strcmp(codeset, "UTF-16LE") == 0 ||
-                            strcmp(codeset, "UTF-16LE-BOM") == 0){
-                       input_f = UTF16_INPUT;
-                       input_endian = ENDIAN_LITTLE;
-                   }else if(strcmp(codeset, "UTF-32") == 0 ||
-                            strcmp(codeset, "UTF-32BE") == 0 ||
-                            strcmp(codeset, "UTF-32BE-BOM") == 0){
-                       input_f = UTF32_INPUT;
-                       input_endian = ENDIAN_BIG;
-                   }else if(strcmp(codeset, "UTF-32LE") == 0 ||
-                            strcmp(codeset, "UTF-32LE-BOM") == 0){
-                       input_f = UTF32_INPUT;
-                       input_endian = ENDIAN_LITTLE;
-#endif
-                   } else {
-                       fprintf(stderr, "unknown input encoding: %s\n", codeset);
-                   }
-                    continue;
-               }
-                if (strcmp(long_option[i].name, "oc=") == 0){
-                   x0201_f = FALSE;
-                   for (i=0; i < 16 && SP < p[i] && p[i] < DEL; i++){
-                       codeset[i] = nkf_toupper(p[i]);
-                   }
-                   codeset[i] = 0;
-                   if(strcmp(codeset, "ISO-2022-JP") == 0){
-                       output_conv = j_oconv;
-                   }else if(strcmp(codeset, "X-ISO2022JP-CP932") == 0){
-                       output_conv = j_oconv;
-                       no_cp932ext_f = TRUE;
-#ifdef SHIFTJIS_CP932
-                       cp932inv_f = FALSE;
+    case UTF8_MAC:
+       nfc_f = TRUE;
+       break;
 #endif
-#ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_CP932;
+    case UTF_16:
+    case UTF_16BE:
+    case UTF_16BE_BOM:
+       input_endian = ENDIAN_BIG;
+       break;
+    case UTF_16LE:
+    case UTF_16LE_BOM:
+       input_endian = ENDIAN_LITTLE;
+       break;
+    case UTF_32:
+    case UTF_32BE:
+    case UTF_32BE_BOM:
+       input_endian = ENDIAN_BIG;
+       break;
+    case UTF_32LE:
+    case UTF_32LE_BOM:
+       input_endian = ENDIAN_LITTLE;
+       break;
 #endif
-                   }else if(strcmp(codeset, "CP50220") == 0){
-                       output_conv = j_oconv;
-                       x0201_f = TRUE;
+    }
+}
+
+static void
+set_output_encoding(nkf_encoding *enc)
+{
+    switch (nkf_enc_to_index(enc)) {
+    case CP50220:
+       x0201_f = TRUE;
 #ifdef SHIFTJIS_CP932
-                       cp932inv_f = FALSE;
+       if (cp932inv_f == TRUE) cp932inv_f = FALSE;
 #endif
 #ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_CP932;
+       ms_ucs_map_f = UCS_MAP_CP932;
 #endif
-                   }else if(strcmp(codeset, "CP50221") == 0){
-                       output_conv = j_oconv;
+       break;
+    case CP50221:
+       x0201_f = TRUE;
 #ifdef SHIFTJIS_CP932
-                       cp932inv_f = FALSE;
+       if (cp932inv_f == TRUE) cp932inv_f = FALSE;
 #endif
 #ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_CP932;
-#endif
-                   }else if(strcmp(codeset, "ISO-2022-JP-1") == 0){
-                       output_conv = j_oconv;
-#ifdef X0212_ENABLE
-                       x0212_f = TRUE;
+       ms_ucs_map_f = UCS_MAP_CP932;
 #endif
+       break;
+    case ISO_2022_JP:
 #ifdef SHIFTJIS_CP932
-                       cp932inv_f = FALSE;
-#endif
-                   }else if(strcmp(codeset, "ISO-2022-JP-3") == 0){
-                       output_conv = j_oconv;
-#ifdef X0212_ENABLE
-                       x0212_f = TRUE;
+       if (cp932inv_f == TRUE) cp932inv_f = FALSE;
 #endif
-                       x0213_f = TRUE;
+       break;
+    case ISO_2022_JP_1:
+       x0212_f = TRUE;
 #ifdef SHIFTJIS_CP932
-                       cp932inv_f = FALSE;
-#endif
-                   }else if(strcmp(codeset, "SHIFT_JIS") == 0){
-                       output_conv = s_oconv;
-                   }else if(strcmp(codeset, "WINDOWS-31J") == 0 ||
-                            strcmp(codeset, "CSWINDOWS31J") == 0 ||
-                            strcmp(codeset, "CP932") == 0 ||
-                            strcmp(codeset, "MS932") == 0){
-                       output_conv = s_oconv;
-#ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_CP932;
-#endif
-                   }else if(strcmp(codeset, "CP10001") == 0){
-                       output_conv = s_oconv;
-#ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_CP10001;
+       if (cp932inv_f == TRUE) cp932inv_f = FALSE;
 #endif
-                   }else if(strcmp(codeset, "EUCJP") == 0 ||
-                            strcmp(codeset, "EUC-JP") == 0){
-                       output_conv = e_oconv;
-                   }else if(strcmp(codeset, "CP51932") == 0){
-                       output_conv = e_oconv;
+       break;
+    case ISO_2022_JP_3:
+       x0212_f = TRUE;
+       x0213_f = TRUE;
 #ifdef SHIFTJIS_CP932
-                       cp932inv_f = FALSE;
+       if (cp932inv_f == TRUE) cp932inv_f = FALSE;
 #endif
+       break;
+    case SHIFT_JIS:
+       break;
+    case WINDOWS_31J:
+       x0201_f = TRUE;
 #ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_CP932;
-#endif
-                   }else if(strcmp(codeset, "EUC-JP-MS") == 0 ||
-                            strcmp(codeset, "EUCJP-MS") == 0 ||
-                            strcmp(codeset, "EUCJPMS") == 0){
-                       output_conv = e_oconv;
-#ifdef X0212_ENABLE
-                       x0212_f = TRUE;
+       ms_ucs_map_f = UCS_MAP_CP932;
 #endif
+       break;
+    case CP10001:
 #ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_MS;
+       ms_ucs_map_f = UCS_MAP_CP10001;
 #endif
-                   }else if(strcmp(codeset, "EUC-JP-ASCII") == 0 ||
-                            strcmp(codeset, "EUCJP-ASCII") == 0){
-                       output_conv = e_oconv;
-#ifdef X0212_ENABLE
-                       x0212_f = TRUE;
+       break;
+    case EUC_JP:
+       x0212_f = TRUE;
+#ifdef SHIFTJIS_CP932
+       if (cp932inv_f == TRUE) cp932inv_f = FALSE;
 #endif
 #ifdef UTF8_OUTPUT_ENABLE
-                       ms_ucs_map_f = UCS_MAP_ASCII;
+       ms_ucs_map_f = UCS_MAP_ASCII;
 #endif
-                   }else if(strcmp(codeset, "SHIFT_JISX0213") == 0 ||
-                            strcmp(codeset, "SHIFT_JIS-2004") == 0){
-                       output_conv = s_oconv;
-                       x0213_f = TRUE;
+       break;
+    case EUCJP_NKF:
+       x0212_f = FALSE;
 #ifdef SHIFTJIS_CP932
-                       cp932inv_f = FALSE;
+       if (cp932inv_f == TRUE) cp932inv_f = FALSE;
 #endif
-                   }else if(strcmp(codeset, "EUC-JISX0213") == 0 ||
-                            strcmp(codeset, "EUC-JIS-2004") == 0){
-                       output_conv = e_oconv;
-#ifdef X0212_ENABLE
-                       x0212_f = TRUE;
+#ifdef UTF8_OUTPUT_ENABLE
+       ms_ucs_map_f = UCS_MAP_ASCII;
 #endif
-                       x0213_f = TRUE;
+       break;
+    case CP51932:
+       x0201_f = TRUE;
 #ifdef SHIFTJIS_CP932
-                       cp932inv_f = FALSE;
+       if (cp932inv_f == TRUE) cp932inv_f = FALSE;
 #endif
 #ifdef UTF8_OUTPUT_ENABLE
-                   }else if(strcmp(codeset, "UTF-8") == 0){
-                       output_conv = w_oconv;
-                   }else if(strcmp(codeset, "UTF-8N") == 0){
-                       output_conv = w_oconv;
-                   }else if(strcmp(codeset, "UTF-8-BOM") == 0){
-                       output_conv = w_oconv;
-                       output_bom_f = TRUE;
-                   }else if(strcmp(codeset, "UTF-16BE") == 0){
-                       output_conv = w_oconv16;
-                   }else if(strcmp(codeset, "UTF-16") == 0 ||
-                            strcmp(codeset, "UTF-16BE-BOM") == 0){
-                       output_conv = w_oconv16;
-                       output_bom_f = TRUE;
-                   }else if(strcmp(codeset, "UTF-16LE") == 0){
-                       output_conv = w_oconv16;
-                       output_endian = ENDIAN_LITTLE;
-                   }else if(strcmp(codeset, "UTF-16LE-BOM") == 0){
-                       output_conv = w_oconv16;
-                       output_endian = ENDIAN_LITTLE;
-                       output_bom_f = TRUE;
-                   }else if(strcmp(codeset, "UTF-32") == 0 ||
-                            strcmp(codeset, "UTF-32BE") == 0){
-                       output_conv = w_oconv32;
-                   }else if(strcmp(codeset, "UTF-32BE-BOM") == 0){
-                       output_conv = w_oconv32;
-                       output_bom_f = TRUE;
-                   }else if(strcmp(codeset, "UTF-32LE") == 0){
-                       output_conv = w_oconv32;
-                       output_endian = ENDIAN_LITTLE;
-                   }else if(strcmp(codeset, "UTF-32LE-BOM") == 0){
-                       output_conv = w_oconv32;
-                       output_endian = ENDIAN_LITTLE;
-                       output_bom_f = TRUE;
-#endif
-                   } else {
-                       fprintf(stderr, "unknown output encoding: %s\n", codeset);
-                   }
-                    continue;
-               }
-                if (strcmp(long_option[i].name, "guess=") == 0){
-                   if (p[0] == '1') {
-                       guess_f = 2;
-                   } else {
-                       guess_f = 1;
-                   }
-                    continue;
-                }
-#ifdef OVERWRITE
-                if (strcmp(long_option[i].name, "overwrite") == 0){
-                    file_out_f = TRUE;
-                    overwrite_f = TRUE;
-                   preserve_time_f = TRUE;
-                    continue;
-                }
-                if (strcmp(long_option[i].name, "overwrite=") == 0){
-                    file_out_f = TRUE;
-                    overwrite_f = TRUE;
-                   preserve_time_f = TRUE;
-                   backup_f = TRUE;
-                   backup_suffix = malloc(strlen((char *) p) + 1);
-                   strcpy(backup_suffix, (char *) p);
-                    continue;
-                }
-                if (strcmp(long_option[i].name, "in-place") == 0){
-                    file_out_f = TRUE;
-                    overwrite_f = TRUE;
-                   preserve_time_f = FALSE;
-                   continue;
-                }
-                if (strcmp(long_option[i].name, "in-place=") == 0){
-                    file_out_f = TRUE;
-                    overwrite_f = TRUE;
-                   preserve_time_f = FALSE;
-                   backup_f = TRUE;
-                   backup_suffix = malloc(strlen((char *) p) + 1);
-                   strcpy(backup_suffix, (char *) p);
-                   continue;
-                }
+       ms_ucs_map_f = UCS_MAP_CP932;
 #endif
-#ifdef INPUT_OPTION
-                if (strcmp(long_option[i].name, "cap-input") == 0){
-                    cap_f = TRUE;
-                    continue;
-                }
-                if (strcmp(long_option[i].name, "url-input") == 0){
-                    url_f = TRUE;
-                    continue;
-                }
+       break;
+    case EUCJP_MS:
+       x0212_f = TRUE;
+#ifdef UTF8_OUTPUT_ENABLE
+       ms_ucs_map_f = UCS_MAP_MS;
 #endif
-#ifdef NUMCHAR_OPTION
-                if (strcmp(long_option[i].name, "numchar-input") == 0){
-                    numchar_f = TRUE;
-                    continue;
-                }
+       break;
+    case EUCJP_ASCII:
+       x0212_f = TRUE;
+#ifdef UTF8_OUTPUT_ENABLE
+       ms_ucs_map_f = UCS_MAP_ASCII;
 #endif
-#ifdef CHECK_OPTION
-                if (strcmp(long_option[i].name, "no-output") == 0){
-                    noout_f = TRUE;
-                    continue;
-                }
-                if (strcmp(long_option[i].name, "debug") == 0){
-                    debug_f = TRUE;
-                    continue;
-                }
-#endif
-                if (strcmp(long_option[i].name, "cp932") == 0){
+       break;
+    case SHIFT_JISX0213:
+    case SHIFT_JIS_2004:
+       x0213_f = TRUE;
 #ifdef SHIFTJIS_CP932
-                    cp51932_f = TRUE;
-                    cp932inv_f = TRUE;
-#endif
-#ifdef UTF8_OUTPUT_ENABLE
-                    ms_ucs_map_f = UCS_MAP_CP932;
+       if (cp932inv_f == TRUE) cp932inv_f = FALSE;
 #endif
-                    continue;
-                }
-                if (strcmp(long_option[i].name, "no-cp932") == 0){
+       break;
+    case EUC_JISX0213:
+    case EUC_JIS_2004:
+       x0212_f = TRUE;
+       x0213_f = TRUE;
 #ifdef SHIFTJIS_CP932
-                    cp51932_f = FALSE;
-                    cp932inv_f = FALSE;
+       if (cp932inv_f == TRUE) cp932inv_f = FALSE;
 #endif
+       break;
 #ifdef UTF8_OUTPUT_ENABLE
-                    ms_ucs_map_f = UCS_MAP_ASCII;
-#endif
-                    continue;
-                }
-#ifdef SHIFTJIS_CP932
-                if (strcmp(long_option[i].name, "cp932inv") == 0){
-                    cp932inv_f = TRUE;
-                    continue;
-                }
+    case UTF_8_BOM:
+       output_bom_f = TRUE;
+       break;
+    case UTF_16:
+    case UTF_16BE_BOM:
+       output_bom_f = TRUE;
+       break;
+    case UTF_16LE:
+       output_endian = ENDIAN_LITTLE;
+       output_bom_f = FALSE;
+       break;
+    case UTF_16LE_BOM:
+       output_endian = ENDIAN_LITTLE;
+       output_bom_f = TRUE;
+       break;
+    case UTF_32:
+    case UTF_32BE_BOM:
+       output_bom_f = TRUE;
+       break;
+    case UTF_32LE:
+       output_endian = ENDIAN_LITTLE;
+       output_bom_f = FALSE;
+       break;
+    case UTF_32LE_BOM:
+       output_endian = ENDIAN_LITTLE;
+       output_bom_f = TRUE;
+       break;
 #endif
+    }
+}
 
-#ifdef X0212_ENABLE
-                if (strcmp(long_option[i].name, "x0212") == 0){
-                    x0212_f = TRUE;
-                    continue;
-                }
+static struct input_code*
+find_inputcode_byfunc(nkf_char (*iconv_func)(nkf_char c2,nkf_char c1,nkf_char c0))
+{
+    if (iconv_func){
+       struct input_code *p = input_code_list;
+       while (p->name){
+           if (iconv_func == p->iconv_func){
+               return p;
+           }
+           p++;
+       }
+    }
+    return 0;
+}
+
+static void
+set_iconv(nkf_char f, nkf_char (*iconv_func)(nkf_char c2,nkf_char c1,nkf_char c0))
+{
+#ifdef INPUT_CODE_FIX
+    if (f || !input_encoding)
 #endif
+       if (estab_f != f){
+           estab_f = f;
+       }
 
-#ifdef EXEC_IO
-                  if (strcmp(long_option[i].name, "exec-in") == 0){
-                      exec_f = 1;
-                      return;
-                  }
-                  if (strcmp(long_option[i].name, "exec-out") == 0){
-                      exec_f = -1;
-                      return;
-                  }
+    if (iconv_func
+#ifdef INPUT_CODE_FIX
+       && (f == -TRUE || !input_encoding) /* -TRUE means "FORCE" */
 #endif
-#if defined(UTF8_OUTPUT_ENABLE) && defined(UTF8_INPUT_ENABLE)
-                if (strcmp(long_option[i].name, "no-cp932ext") == 0){
-                   no_cp932ext_f = TRUE;
-                    continue;
-                }
-               if (strcmp(long_option[i].name, "no-best-fit-chars") == 0){
-                   no_best_fit_chars_f = TRUE;
-                   continue;
-               }
-                if (strcmp(long_option[i].name, "fb-skip") == 0){
-                   encode_fallback = NULL;
-                    continue;
-                }
-                if (strcmp(long_option[i].name, "fb-html") == 0){
-                   encode_fallback = encode_fallback_html;
-                    continue;
-                }
-                if (strcmp(long_option[i].name, "fb-xml") == 0){
-                   encode_fallback = encode_fallback_xml;
-                    continue;
-                }
-                if (strcmp(long_option[i].name, "fb-java") == 0){
-                   encode_fallback = encode_fallback_java;
-                    continue;
-                }
-                if (strcmp(long_option[i].name, "fb-perl") == 0){
-                   encode_fallback = encode_fallback_perl;
-                    continue;
-                }
-                if (strcmp(long_option[i].name, "fb-subchar") == 0){
-                   encode_fallback = encode_fallback_subchar;
-                    continue;
-                }
-                if (strcmp(long_option[i].name, "fb-subchar=") == 0){
-                   encode_fallback = encode_fallback_subchar;
-                   unicode_subchar = 0;
-                   if (p[0] != '0'){
-                       /* decimal number */
-                       for (i = 0; i < 7 && nkf_isdigit(p[i]); i++){
-                           unicode_subchar *= 10;
-                           unicode_subchar += hex2bin(p[i]);
-                       }
-                   }else if(p[1] == 'x' || p[1] == 'X'){
-                       /* hexadecimal number */
-                       for (i = 2; i < 8 && nkf_isxdigit(p[i]); i++){
-                           unicode_subchar <<= 4;
-                           unicode_subchar |= hex2bin(p[i]);
-                       }
-                   }else{
-                       /* octal number */
-                       for (i = 1; i < 8 && nkf_isoctal(p[i]); i++){
-                           unicode_subchar *= 8;
-                           unicode_subchar += hex2bin(p[i]);
-                       }
-                   }
-                   w16e_conv(unicode_subchar, &i, &j);
-                   unicode_subchar = i<<8 | j;
-                    continue;
-                }
-#endif
-#ifdef UTF8_OUTPUT_ENABLE
-                if (strcmp(long_option[i].name, "ms-ucs-map") == 0){
-                    ms_ucs_map_f = UCS_MAP_MS;
-                    continue;
-                }
-#endif
-#ifdef UNICODE_NORMALIZATION
-               if (strcmp(long_option[i].name, "utf8mac-input") == 0){
-                   input_f = UTF8_INPUT;
-                   nfc_f = TRUE;
-                   continue;
-               }
-#endif
-                if (strcmp(long_option[i].name, "prefix=") == 0){
-                    if (nkf_isgraph(p[0])){
-                        for (i = 1; nkf_isgraph(p[i]); i++){
-                            prefix_table[p[i]] = p[0];
-                        }
-                    }
-                    continue;
-                }
-            }
-            continue;
-        case 'b':           /* buffered mode */
-            unbuf_f = FALSE;
-            continue;
-        case 'u':           /* non bufferd mode */
-            unbuf_f = TRUE;
-            continue;
-        case 't':           /* transparent mode */
-            if (*cp=='1') {
-               /* alias of -t */
-               nop_f = TRUE;
-               *cp++;
-           } else if (*cp=='2') {
-               /*
-                * -t with put/get
-                *
-                * nkf -t2MB hoge.bin | nkf -t2mB | diff -s - hoge.bin
-                *
-                */
-               nop_f = 2;
-               *cp++;
-            } else
-               nop_f = TRUE;
-            continue;
-        case 'j':           /* JIS output */
-        case 'n':
-            output_conv = j_oconv;
-            continue;
-        case 'e':           /* AT&T EUC output */
-            output_conv = e_oconv;
-            cp932inv_f = FALSE;
-            continue;
-        case 's':           /* SJIS output */
-            output_conv = s_oconv;
-            continue;
-        case 'l':           /* ISO8859 Latin-1 support, no conversion */
-            iso8859_f = TRUE;  /* Only compatible with ISO-2022-JP */
-            input_f = LATIN1_INPUT;
-            continue;
-        case 'i':           /* Kanji IN ESC-$-@/B */
-            if (*cp=='@'||*cp=='B')
-                kanji_intro = *cp++;
-            continue;
-        case 'o':           /* ASCII IN ESC-(-J/B */
-            if (*cp=='J'||*cp=='B'||*cp=='H')
-                ascii_intro = *cp++;
-            continue;
-        case 'h':
-            /*
-                bit:1   katakana->hiragana
-                bit:2   hiragana->katakana
-            */
-            if ('9'>= *cp && *cp>='0')
-                hira_f |= (*cp++ -'0');
-            else
-                hira_f |= 1;
-            continue;
-        case 'r':
-            rot_f = TRUE;
-            continue;
-#if defined(MSDOS) || defined(__OS2__)
-        case 'T':
-            binmode_f = FALSE;
-            continue;
-#endif
-#ifndef PERL_XS
-        case 'V':
-            version();
-            exit(1);
-            break;
-        case 'v':
-            usage();
-            exit(1);
-            break;
-#endif
-#ifdef UTF8_OUTPUT_ENABLE
-        case 'w':           /* UTF-8 output */
-            if (cp[0] == '8') {
-               output_conv = w_oconv; cp++;
-               if (cp[0] == '0'){
-                   cp++;
-               } else {
-                   output_bom_f = TRUE;
-               }
-           } else {
-               if ('1'== cp[0] && '6'==cp[1]) {
-                   output_conv = w_oconv16; cp+=2;
-               } else if ('3'== cp[0] && '2'==cp[1]) {
-                   output_conv = w_oconv32; cp+=2;
-               } else {
-                   output_conv = w_oconv;
-                   continue;
-               }
-               if (cp[0]=='L') {
-                   cp++;
-                   output_endian = ENDIAN_LITTLE;
-               } else if (cp[0] == 'B') {
-                   cp++;
-                } else {
-                   continue;
-                }
-               if (cp[0] == '0'){
-                   cp++;
-               } else {
-                   output_bom_f = TRUE;
-               }
-           }
-            continue;
-#endif
-#ifdef UTF8_INPUT_ENABLE
-        case 'W':           /* UTF input */
-           if (cp[0] == '8') {
-               cp++;
-               input_f = UTF8_INPUT;
-           }else{
-               if ('1'== cp[0] && '6'==cp[1]) {
-                   cp += 2;
-                   input_f = UTF16_INPUT;
-                   input_endian = ENDIAN_BIG;
-               } else if ('3'== cp[0] && '2'==cp[1]) {
-                   cp += 2;
-                   input_f = UTF32_INPUT;
-                   input_endian = ENDIAN_BIG;
-               } else {
-                   input_f = UTF8_INPUT;
-                   continue;
-               }
-               if (cp[0]=='L') {
-                   cp++;
-                   input_endian = ENDIAN_LITTLE;
-               } else if (cp[0] == 'B') {
-                   cp++;
-               }
-           }
-            continue;
-#endif
-        /* Input code assumption */
-        case 'J':   /* JIS input */
-            input_f = JIS_INPUT;
-            continue;
-        case 'E':   /* AT&T EUC input */
-            input_f = EUC_INPUT;
-            continue;
-        case 'S':   /* MS Kanji input */
-            input_f = SJIS_INPUT;
-            if (x0201_f==NO_X0201) x0201_f=TRUE;
-            continue;
-        case 'Z':   /* Convert X0208 alphabet to asii */
-            /* alpha_f
-              bit:0   Convert JIS X 0208 Alphabet to ASCII
-              bit:1   Convert Kankaku to one space
-              bit:2   Convert Kankaku to two spaces
-              bit:3   Convert HTML Entity
-              bit:4   Convert JIS X 0208 Katakana to JIS X 0201 Katakana
-            */
-           while ('0'<= *cp && *cp <='9') {
-               alpha_f |= 1 << (*cp++ - '0');
-           }
-            if (!alpha_f) alpha_f = 1;
-            continue;
-        case 'x':   /* Convert X0201 kana to X0208 or X0201 Conversion */
-            x0201_f = FALSE;    /* No X0201->X0208 conversion */
-            /* accept  X0201
-                    ESC-(-I     in JIS, EUC, MS Kanji
-                    SI/SO       in JIS, EUC, MS Kanji
-                    SSO         in EUC, JIS, not in MS Kanji
-                    MS Kanji (0xa0-0xdf)
-               output  X0201
-                    ESC-(-I     in JIS (0x20-0x5f)
-                    SSO         in EUC (0xa0-0xdf)
-                    0xa0-0xd    in MS Kanji (0xa0-0xdf)
-            */
-            continue;
-        case 'X':   /* Assume X0201 kana */
-            /* Default value is NO_X0201 for EUC/MS-Kanji mix */
-            x0201_f = TRUE;
-            continue;
-        case 'F':   /* prserve new lines */
-           fold_preserve_f = TRUE;
-        case 'f':   /* folding -f60 or -f */
-            fold_f = TRUE;
-            fold_len = 0;
-            while('0'<= *cp && *cp <='9') { /* we don't use atoi here */
-               fold_len *= 10;
-               fold_len += *cp++ - '0';
-           }
-            if (!(0<fold_len && fold_len<BUFSIZ))
-                fold_len = DEFAULT_FOLD;
-           if (*cp=='-') {
-               fold_margin = 0;
-               cp++;
-               while('0'<= *cp && *cp <='9') { /* we don't use atoi here */
-                   fold_margin *= 10;
-                   fold_margin += *cp++ - '0';
-               }
-           }
-            continue;
-        case 'm':   /* MIME support */
-            /* mime_decode_f = TRUE; */ /* this has too large side effects... */
-            if (*cp=='B'||*cp=='Q') {
-                mime_decode_mode = *cp++;
-                mimebuf_f = FIXED_MIME;
-            } else if (*cp=='N') {
-                mime_f = TRUE; cp++;
-            } else if (*cp=='S') {
-                mime_f = STRICT_MIME; cp++;
-            } else if (*cp=='0') {
-                mime_decode_f = FALSE;
-                mime_f = FALSE; cp++;
-            }
-            continue;
-        case 'M':   /* MIME output */
-            if (*cp=='B') {
-                mimeout_mode = 'B';
-                mimeout_f = FIXED_MIME; cp++;
-            } else if (*cp=='Q') {
-                mimeout_mode = 'Q';
-                mimeout_f = FIXED_MIME; cp++;
-            } else {
-               mimeout_f = TRUE;
-           }
-            continue;
-        case 'B':   /* Broken JIS support */
-            /*  bit:0   no ESC JIS
-                bit:1   allow any x on ESC-(-x or ESC-$-x
-                bit:2   reset to ascii on NL
-            */
-            if ('9'>= *cp && *cp>='0')
-                broken_f |= 1<<(*cp++ -'0');
-            else
-                broken_f |= TRUE;
-            continue;
-#ifndef PERL_XS
-        case 'O':/* for Output file */
-            file_out_f = TRUE;
-            continue;
-#endif
-        case 'c':/* add cr code */
-            nlmode_f = CRLF;
-            continue;
-        case 'd':/* delete cr code */
-            nlmode_f = LF;
-            continue;
-        case 'I':   /* ISO-2022-JP output */
-            iso2022jp_f = TRUE;
-            continue;
-        case 'L':  /* line mode */
-            if (*cp=='u') {         /* unix */
-                nlmode_f = LF; cp++;
-            } else if (*cp=='m') { /* mac */
-                nlmode_f = CR; cp++;
-            } else if (*cp=='w') { /* windows */
-                nlmode_f = CRLF; cp++;
-            } else if (*cp=='0') { /* no conversion  */
-                nlmode_f = 0; cp++;
-            }
-            continue;
-#ifndef PERL_XS
-        case 'g':
-            if (*cp == '1') {
-                guess_f = 2;
-                cp++;
-            } else if (*cp == '0') {
-               guess_f = 1;
-                cp++;
-            } else {
-               guess_f = 1;
-            }
-            continue;
-#endif
-        case SP:
-        /* module muliple options in a string are allowed for Perl moudle  */
-           while(*cp && *cp++!='-');
-            continue;
-        default:
-           fprintf(stderr, "unknown option: -%c\n", *(cp-1));
-            /* bogus option but ignored */
-            continue;
-        }
-    }
-}
-
-struct input_code * find_inputcode_byfunc(nkf_char (*iconv_func)(nkf_char c2,nkf_char c1,nkf_char c0))
-{
-    if (iconv_func){
-        struct input_code *p = input_code_list;
-        while (p->name){
-            if (iconv_func == p->iconv_func){
-                return p;
-            }
-            p++;
-        }
-    }
-    return 0;
-}
-
-void set_iconv(nkf_char f, nkf_char (*iconv_func)(nkf_char c2,nkf_char c1,nkf_char c0))
-{
-#ifdef INPUT_CODE_FIX
-    if (f || !input_f)
-#endif
-        if (estab_f != f){
-            estab_f = f;
-        }
-
-    if (iconv_func
-#ifdef INPUT_CODE_FIX
-        && (f == -TRUE || !input_f) /* -TRUE means "FORCE" */
-#endif
-        ){
-        iconv = iconv_func;
+       ){
+       iconv = iconv_func;
     }
 #ifdef CHECK_OPTION
     if (estab_f && iconv_for_check != iconv){
-        struct input_code *p = find_inputcode_byfunc(iconv);
-        if (p){
-            set_input_codename(p->name);
-            debug(p->name);
-        }
-        iconv_for_check = iconv;
+       struct input_code *p = find_inputcode_byfunc(iconv);
+       if (p){
+           set_input_codename(p->name);
+           debug(p->name);
+       }
+       iconv_for_check = iconv;
     }
 #endif
 }
 
-#define SCORE_L2       (1)                   /* \e$BBh\e(B2\e$B?e=`4A;z\e(B */
-#define SCORE_KANA     (SCORE_L2 << 1)       /* \e$B$$$o$f$kH>3Q%+%J\e(B */
-#define SCORE_DEPEND   (SCORE_KANA << 1)     /* \e$B5!<o0MB8J8;z\e(B */
-#define SCORE_CP932    (SCORE_DEPEND << 1)   /* CP932 \e$B$K$h$kFI$_49$(\e(B (IBM extended characters) */
-#define SCORE_X0212    (SCORE_CP932 << 1)    /* JIS X 0212 */
-#define SCORE_NO_EXIST (SCORE_X0212 << 1)    /* \e$BB8:_$7$J$$J8;z\e(B */
-#define SCORE_iMIME    (SCORE_NO_EXIST << 1) /* MIME \e$B$K$h$k;XDj\e(B */
-#define SCORE_ERROR    (SCORE_iMIME << 1) /* \e$B%(%i!<\e(B */
-
-#define SCORE_INIT (SCORE_iMIME)
-
-static const char score_table_A0[] = {
-    0, 0, 0, 0,
-    0, 0, 0, 0,
-    0, SCORE_DEPEND, SCORE_DEPEND, SCORE_DEPEND,
-    SCORE_DEPEND, SCORE_DEPEND, SCORE_DEPEND, SCORE_NO_EXIST,
-};
-
-static const char score_table_F0[] = {
-    SCORE_L2, SCORE_L2, SCORE_L2, SCORE_L2,
-    SCORE_L2, SCORE_DEPEND, SCORE_NO_EXIST, SCORE_NO_EXIST,
-    SCORE_DEPEND, SCORE_DEPEND, SCORE_CP932, SCORE_CP932,
-    SCORE_CP932, SCORE_NO_EXIST, SCORE_NO_EXIST, SCORE_ERROR,
-};
-
-void set_code_score(struct input_code *ptr, nkf_char score)
+#ifdef X0212_ENABLE
+static nkf_char
+x0212_shift(nkf_char c)
 {
-    if (ptr){
-        ptr->score |= score;
+    nkf_char ret = c;
+    c &= 0x7f;
+    if (is_eucg3(ret)){
+       if (0x75 <= c && c <= 0x7f){
+           ret = c + (0x109 - 0x75);
+       }
+    }else{
+       if (0x75 <= c && c <= 0x7f){
+           ret = c + (0x113 - 0x75);
+       }
     }
+    return ret;
 }
 
-void clr_code_score(struct input_code *ptr, nkf_char score)
-{
-    if (ptr){
-        ptr->score &= ~score;
-    }
-}
 
-void code_score(struct input_code *ptr)
+static nkf_char
+x0212_unshift(nkf_char c)
 {
-    nkf_char c2 = ptr->buf[0];
-#ifdef UTF8_OUTPUT_ENABLE
-    nkf_char c1 = ptr->buf[1];
-#endif
-    if (c2 < 0){
-        set_code_score(ptr, SCORE_ERROR);
-    }else if (c2 == SSO){
-        set_code_score(ptr, SCORE_KANA);
-    }else if (c2 == 0x8f){
-        set_code_score(ptr, SCORE_X0212);
-#ifdef UTF8_OUTPUT_ENABLE
-    }else if (!e2w_conv(c2, c1)){
-        set_code_score(ptr, SCORE_NO_EXIST);
-#endif
-    }else if ((c2 & 0x70) == 0x20){
-        set_code_score(ptr, score_table_A0[c2 & 0x0f]);
-    }else if ((c2 & 0x70) == 0x70){
-        set_code_score(ptr, score_table_F0[c2 & 0x0f]);
-    }else if ((c2 & 0x70) >= 0x50){
-        set_code_score(ptr, SCORE_L2);
+    nkf_char ret = c;
+    if (0x7f <= c && c <= 0x88){
+       ret = c + (0x75 - 0x7f);
+    }else if (0x89 <= c && c <= 0x92){
+       ret = PREFIX_EUCG3 | 0x80 | (c + (0x75 - 0x89));
     }
+    return ret;
 }
+#endif /* X0212_ENABLE */
 
-void status_disable(struct input_code *ptr)
-{
-    ptr->stat = -1;
-    ptr->buf[0] = -1;
-    code_score(ptr);
-    if (iconv == ptr->iconv_func) set_iconv(FALSE, 0);
-}
-
-void status_push_ch(struct input_code *ptr, nkf_char c)
-{
-    ptr->buf[ptr->index++] = c;
-}
-
-void status_clear(struct input_code *ptr)
-{
-    ptr->stat = 0;
-    ptr->index = 0;
-}
-
-void status_reset(struct input_code *ptr)
-{
-    status_clear(ptr);
-    ptr->score = SCORE_INIT;
-}
-
-void status_reinit(struct input_code *ptr)
+static nkf_char
+e2s_conv(nkf_char c2, nkf_char c1, nkf_char *p2, nkf_char *p1)
 {
-    status_reset(ptr);
-    ptr->_file_stat = 0;
+    nkf_char ndx;
+    if (is_eucg3(c2)){
+       ndx = c2 & 0x7f;
+       if (x0213_f){
+           if((0x21 <= ndx && ndx <= 0x2F)){
+               if (p2) *p2 = ((ndx - 1) >> 1) + 0xec - ndx / 8 * 3;
+               if (p1) *p1 = c1 + ((ndx & 1) ? ((c1 < 0x60) ? 0x1f : 0x20) : 0x7e);
+               return 0;
+           }else if(0x6E <= ndx && ndx <= 0x7E){
+               if (p2) *p2 = ((ndx - 1) >> 1) + 0xbe;
+               if (p1) *p1 = c1 + ((ndx & 1) ? ((c1 < 0x60) ? 0x1f : 0x20) : 0x7e);
+               return 0;
+           }
+           return 1;
+       }
+#ifdef X0212_ENABLE
+       else if(nkf_isgraph(ndx)){
+           nkf_char val = 0;
+           const unsigned short *ptr;
+           ptr = x0212_shiftjis[ndx - 0x21];
+           if (ptr){
+               val = ptr[(c1 & 0x7f) - 0x21];
+           }
+           if (val){
+               c2 = val >> 8;
+               c1 = val & 0xff;
+               if (p2) *p2 = c2;
+               if (p1) *p1 = c1;
+               return 0;
+           }
+           c2 = x0212_shift(c2);
+       }
+#endif /* X0212_ENABLE */
+    }
+    if(0x7F < c2) return 1;
+    if (p2) *p2 = ((c2 - 1) >> 1) + ((c2 <= 0x5e) ? 0x71 : 0xb1);
+    if (p1) *p1 = c1 + ((c2 & 1) ? ((c1 < 0x60) ? 0x1f : 0x20) : 0x7e);
+    return 0;
 }
 
-void status_check(struct input_code *ptr, nkf_char c)
+static nkf_char
+s2e_conv(nkf_char c2, nkf_char c1, nkf_char *p2, nkf_char *p1)
 {
-    if (c <= DEL && estab_f){
-        status_reset(ptr);
-    }
-}
-
-void s_status(struct input_code *ptr, nkf_char c)
-{
-    switch(ptr->stat){
-      case -1:
-          status_check(ptr, c);
-          break;
-      case 0:
-          if (c <= DEL){
-              break;
-#ifdef NUMCHAR_OPTION
-          }else if (is_unicode_capsule(c)){
-              break;
-#endif
-          }else if (0xa1 <= c && c <= 0xdf){
-              status_push_ch(ptr, SSO);
-              status_push_ch(ptr, c);
-              code_score(ptr);
-              status_clear(ptr);
-          }else if ((0x81 <= c && c < 0xa0) || (0xe0 <= c && c <= 0xea)){
-              ptr->stat = 1;
-              status_push_ch(ptr, c);
-          }else if (0xed <= c && c <= 0xee){
-              ptr->stat = 3;
-              status_push_ch(ptr, c);
+#if defined(SHIFTJIS_CP932) || defined(X0212_ENABLE)
+    nkf_char val;
+#endif
+    static const char shift_jisx0213_s1a3_table[5][2] ={ { 1, 8}, { 3, 4}, { 5,12}, {13,14}, {15, 0} };
+    if (0xFC < c1) return 1;
 #ifdef SHIFTJIS_CP932
-          }else if (is_ibmext_in_sjis(c)){
-              ptr->stat = 2;
-              status_push_ch(ptr, c);
+    if (!cp932inv_f && is_ibmext_in_sjis(c2)){
+       val = shiftjis_cp932[c2 - CP932_TABLE_BEGIN][c1 - 0x40];
+       if (val){
+           c2 = val >> 8;
+           c1 = val & 0xff;
+       }
+    }
+    if (cp932inv_f
+       && CP932INV_TABLE_BEGIN <= c2 && c2 <= CP932INV_TABLE_END){
+       val = cp932inv[c2 - CP932INV_TABLE_BEGIN][c1 - 0x40];
+       if (val){
+           c2 = val >> 8;
+           c1 = val & 0xff;
+       }
+    }
 #endif /* SHIFTJIS_CP932 */
 #ifdef X0212_ENABLE
-          }else if (0xf0 <= c && c <= 0xfc){
-              ptr->stat = 1;
-              status_push_ch(ptr, c);
-#endif /* X0212_ENABLE */
-          }else{
-              status_disable(ptr);
-          }
-          break;
-      case 1:
-          if ((0x40 <= c && c <= 0x7e) || (0x80 <= c && c <= 0xfc)){
-              status_push_ch(ptr, c);
-              s2e_conv(ptr->buf[0], ptr->buf[1], &ptr->buf[0], &ptr->buf[1]);
-              code_score(ptr);
-              status_clear(ptr);
-          }else{
-              status_disable(ptr);
-          }
-          break;
-      case 2:
-#ifdef SHIFTJIS_CP932
-       if ((0x40 <= c && c <= 0x7e) || (0x80 <= c && c <= 0xfc)) {
-           status_push_ch(ptr, c);
-           if (s2e_conv(ptr->buf[0], ptr->buf[1], &ptr->buf[0], &ptr->buf[1]) == 0) {
-               set_code_score(ptr, SCORE_CP932);
-               status_clear(ptr);
-               break;
+    if (!x0213_f && is_ibmext_in_sjis(c2)){
+       val = shiftjis_x0212[c2 - 0xfa][c1 - 0x40];
+       if (val){
+           if (val > 0x7FFF){
+               c2 = PREFIX_EUCG3 | ((val >> 8) & 0x7f);
+               c1 = val & 0xff;
+           }else{
+               c2 = val >> 8;
+               c1 = val & 0xff;
            }
+           if (p2) *p2 = c2;
+           if (p1) *p1 = c1;
+           return 0;
        }
-#endif /* SHIFTJIS_CP932 */
-       status_disable(ptr);
-          break;
-      case 3:
-          if ((0x40 <= c && c <= 0x7e) || (0x80 <= c && c <= 0xfc)){
-              status_push_ch(ptr, c);
-              s2e_conv(ptr->buf[0], ptr->buf[1], &ptr->buf[0], &ptr->buf[1]);
-           set_code_score(ptr, SCORE_CP932);
-           status_clear(ptr);
-          }else{
-              status_disable(ptr);
-          }
-          break;
     }
-}
-
-void e_status(struct input_code *ptr, nkf_char c)
-{
-    switch (ptr->stat){
-      case -1:
-          status_check(ptr, c);
-          break;
-      case 0:
-          if (c <= DEL){
-              break;
-#ifdef NUMCHAR_OPTION
-          }else if (is_unicode_capsule(c)){
-              break;
 #endif
-          }else if (SSO == c || (0xa1 <= c && c <= 0xfe)){
-              ptr->stat = 1;
-              status_push_ch(ptr, c);
-#ifdef X0212_ENABLE
-          }else if (0x8f == c){
-              ptr->stat = 2;
-              status_push_ch(ptr, c);
-#endif /* X0212_ENABLE */
-          }else{
-              status_disable(ptr);
-          }
-          break;
-      case 1:
-          if (0xa1 <= c && c <= 0xfe){
-              status_push_ch(ptr, c);
-              code_score(ptr);
-              status_clear(ptr);
-          }else{
-              status_disable(ptr);
-          }
-          break;
-#ifdef X0212_ENABLE
-      case 2:
-          if (0xa1 <= c && c <= 0xfe){
-              ptr->stat = 1;
-              status_push_ch(ptr, c);
-          }else{
-              status_disable(ptr);
-          }
-#endif /* X0212_ENABLE */
-    }
-}
-
-#ifdef UTF8_INPUT_ENABLE
-void w_status(struct input_code *ptr, nkf_char c)
-{
-    switch (ptr->stat){
-      case -1:
-          status_check(ptr, c);
-          break;
-      case 0:
-          if (c <= DEL){
-              break;
-#ifdef NUMCHAR_OPTION
-          }else if (is_unicode_capsule(c)){
-              break;
-#endif
-          }else if (0xc0 <= c && c <= 0xdf){
-              ptr->stat = 1;
-              status_push_ch(ptr, c);
-          }else if (0xe0 <= c && c <= 0xef){
-              ptr->stat = 2;
-              status_push_ch(ptr, c);
-          }else if (0xf0 <= c && c <= 0xf4){
-              ptr->stat = 3;
-              status_push_ch(ptr, c);
-          }else{
-              status_disable(ptr);
-          }
-          break;
-      case 1:
-      case 2:
-          if (0x80 <= c && c <= 0xbf){
-              status_push_ch(ptr, c);
-              if (ptr->index > ptr->stat){
-                  int bom = (ptr->buf[0] == 0xef && ptr->buf[1] == 0xbb
-                             && ptr->buf[2] == 0xbf);
-                  w2e_conv(ptr->buf[0], ptr->buf[1], ptr->buf[2],
-                           &ptr->buf[0], &ptr->buf[1]);
-                  if (!bom){
-                      code_score(ptr);
-                  }
-                  status_clear(ptr);
-              }
-          }else{
-              status_disable(ptr);
-          }
-          break;
-      case 3:
-       if (0x80 <= c && c <= 0xbf){
-           if (ptr->index < ptr->stat){
-               status_push_ch(ptr, c);
-           } else {
-               status_clear(ptr);
+    if(c2 >= 0x80){
+       if(x0213_f && c2 >= 0xF0){
+           if(c2 <= 0xF3 || (c2 == 0xF4 && c1 < 0x9F)){ /* k=1, 3<=k<=5, k=8, 12<=k<=15 */
+               c2 = PREFIX_EUCG3 | 0x20 | shift_jisx0213_s1a3_table[c2 - 0xF0][0x9E < c1];
+           }else{ /* 78<=k<=94 */
+               c2 = PREFIX_EUCG3 | (c2 * 2 - 0x17B);
+               if (0x9E < c1) c2++;
            }
-          }else{
-              status_disable(ptr);
-          }
-          break;
-    }
-}
-#endif
-
-void code_status(nkf_char c)
-{
-    int action_flag = 1;
-    struct input_code *result = 0;
-    struct input_code *p = input_code_list;
-    while (p->name){
-        if (!p->status_func) {
-           ++p;
-           continue;
+       }else{
+#define         SJ0162  0x00e1          /* 01 - 62 ku offset */
+#define         SJ6394  0x0161          /* 63 - 94 ku offset */
+           c2 = c2 + c2 - ((c2 <= 0x9F) ? SJ0162 : SJ6394);
+           if (0x9E < c1) c2++;
+       }
+       if (c1 < 0x9F)
+           c1 = c1 - ((c1 > DEL) ? SP : 0x1F);
+       else {
+           c1 = c1 - 0x7E;
        }
-        if (!p->status_func)
-           continue;
-        (p->status_func)(p, c);
-        if (p->stat > 0){
-            action_flag = 0;
-        }else if(p->stat == 0){
-            if (result){
-                action_flag = 0;
-            }else{
-                result = p;
-            }
-        }
-        ++p;
-    }
-
-    if (action_flag){
-        if (result && !estab_f){
-            set_iconv(TRUE, result->iconv_func);
-        }else if (c <= DEL){
-            struct input_code *ptr = input_code_list;
-            while (ptr->name){
-                status_reset(ptr);
-                ++ptr;
-            }
-        }
     }
-}
 
-#ifndef WIN32DLL
-nkf_char std_getc(FILE *f)
-{
-    if (std_gc_ndx){
-        return std_gc_buf[--std_gc_ndx];
-    }
-    return getc(f);
+#ifdef X0212_ENABLE
+    c2 = x0212_unshift(c2);
+#endif
+    if (p2) *p2 = c2;
+    if (p1) *p1 = c1;
+    return 0;
 }
-#endif /*WIN32DLL*/
 
-nkf_char std_ungetc(nkf_char c, FILE *f)
+#if defined(UTF8_INPUT_ENABLE) || defined(UTF8_OUTPUT_ENABLE)
+static void
+nkf_unicode_to_utf8(nkf_char val, nkf_char *p1, nkf_char *p2, nkf_char *p3, nkf_char *p4)
 {
-    if (std_gc_ndx == STD_GC_BUFSIZE){
-        return EOF;
+    val &= VALUE_MASK;
+    if (val < 0x80){
+       *p1 = val;
+       *p2 = 0;
+       *p3 = 0;
+       *p4 = 0;
+    }else if (val < 0x800){
+       *p1 = 0xc0 | (val >> 6);
+       *p2 = 0x80 | (val & 0x3f);
+       *p3 = 0;
+       *p4 = 0;
+    } else if (nkf_char_unicode_bmp_p(val)) {
+       *p1 = 0xe0 |  (val >> 12);
+       *p2 = 0x80 | ((val >>  6) & 0x3f);
+       *p3 = 0x80 | ( val        & 0x3f);
+       *p4 = 0;
+    } else if (nkf_char_unicode_value_p(val)) {
+       *p1 = 0xf0 |  (val >> 18);
+       *p2 = 0x80 | ((val >> 12) & 0x3f);
+       *p3 = 0x80 | ((val >>  6) & 0x3f);
+       *p4 = 0x80 | ( val        & 0x3f);
+    } else {
+       *p1 = 0;
+       *p2 = 0;
+       *p3 = 0;
+       *p4 = 0;
     }
-    std_gc_buf[std_gc_ndx++] = c;
-    return c;
-}
-
-#ifndef WIN32DLL
-void std_putc(nkf_char c)
-{
-    if(c!=EOF)
-      putchar(c);
 }
-#endif /*WIN32DLL*/
 
-#if !defined(PERL_XS) && !defined(WIN32DLL)
-nkf_char noconvert(FILE *f)
+static nkf_char
+nkf_utf8_to_unicode(nkf_char c1, nkf_char c2, nkf_char c3, nkf_char c4)
 {
-    nkf_char    c;
-
-    if (nop_f == 2)
-       module_connection();
-    while ((c = (*i_getc)(f)) != EOF)
-      (*o_putc)(c);
-    (*o_putc)(EOF);
-    return 1;
+    nkf_char wc;
+    if (c1 <= 0x7F) {
+       /* single byte */
+       wc = c1;
+    }
+    else if (c1 <= 0xC3) {
+       /* trail byte or invalid */
+       return -1;
+    }
+    else if (c1 <= 0xDF) {
+       /* 2 bytes */
+       wc  = (c1 & 0x1F) << 6;
+       wc |= (c2 & 0x3F);
+    }
+    else if (c1 <= 0xEF) {
+       /* 3 bytes */
+       wc  = (c1 & 0x0F) << 12;
+       wc |= (c2 & 0x3F) << 6;
+       wc |= (c3 & 0x3F);
+    }
+    else if (c2 <= 0xF4) {
+       /* 4 bytes */
+       wc  = (c1 & 0x0F) << 18;
+       wc |= (c2 & 0x3F) << 12;
+       wc |= (c3 & 0x3F) << 6;
+       wc |= (c4 & 0x3F);
+    }
+    else {
+       return -1;
+    }
+    return wc;
 }
 #endif
 
-void module_connection(void)
+#ifdef UTF8_INPUT_ENABLE
+static int
+unicode_to_jis_common2(nkf_char c1, nkf_char c0,
+                      const unsigned short *const *pp, nkf_char psize,
+                      nkf_char *p2, nkf_char *p1)
 {
-    oconv = output_conv;
-    o_putc = std_putc;
-
-    /* replace continucation module, from output side */
+    nkf_char c2;
+    const unsigned short *p;
+    unsigned short val;
 
-    /* output redicrection */
-#ifdef CHECK_OPTION
-    if (noout_f || guess_f){
-        o_putc = no_putc;
-    }
-#endif
-    if (mimeout_f) {
-       o_mputc = o_putc;
-       o_putc = mime_putc;
-       if (mimeout_f == TRUE) {
-           o_base64conv = oconv; oconv = base64_conv;
-       }
-       /* base64_count = 0; */
-    }
+    if (pp == 0) return 1;
 
-    if (nlmode_f || guess_f) {
-       o_nlconv = oconv; oconv = nl_conv;
-    }
-    if (rot_f) {
-       o_rot_conv = oconv; oconv = rot_conv;
-    }
-    if (iso2022jp_f) {
-       o_iso2022jp_check_conv = oconv; oconv = iso2022jp_check_conv;
-    }
-    if (hira_f) {
-       o_hira_conv = oconv; oconv = hira_conv;
-    }
-    if (fold_f) {
-       o_fconv = oconv; oconv = fold_conv;
-       f_line = 0;
-    }
-    if (alpha_f || x0201_f) {
-       o_zconv = oconv; oconv = z_conv;
-    }
+    c1 -= 0x80;
+    if (c1 < 0 || psize <= c1) return 1;
+    p = pp[c1];
+    if (p == 0)  return 1;
 
-    i_getc = std_getc;
-    i_ungetc = std_ungetc;
-    /* input redicrection */
-#ifdef INPUT_OPTION
-    if (cap_f){
-        i_cgetc = i_getc; i_getc = cap_getc;
-        i_cungetc = i_ungetc; i_ungetc= cap_ungetc;
-    }
-    if (url_f){
-        i_ugetc = i_getc; i_getc = url_getc;
-        i_uungetc = i_ungetc; i_ungetc= url_ungetc;
-    }
-#endif
-#ifdef NUMCHAR_OPTION
-    if (numchar_f){
-        i_ngetc = i_getc; i_getc = numchar_getc;
-        i_nungetc = i_ungetc; i_ungetc= numchar_ungetc;
-    }
-#endif
-#ifdef UNICODE_NORMALIZATION
-    if (nfc_f && input_f == UTF8_INPUT){
-        i_nfc_getc = i_getc; i_getc = nfc_getc;
-        i_nfc_ungetc = i_ungetc; i_ungetc= nfc_ungetc;
-    }
-#endif
-    if (mime_f && mimebuf_f==FIXED_MIME) {
-       i_mgetc = i_getc; i_getc = mime_getc;
-       i_mungetc = i_ungetc; i_ungetc = mime_ungetc;
-    }
-    if (broken_f & 1) {
-       i_bgetc = i_getc; i_getc = broken_getc;
-       i_bungetc = i_ungetc; i_ungetc = broken_ungetc;
-    }
-    if (input_f == JIS_INPUT || input_f == EUC_INPUT || input_f == LATIN1_INPUT) {
-        set_iconv(-TRUE, e_iconv);
-    } else if (input_f == SJIS_INPUT) {
-        set_iconv(-TRUE, s_iconv);
-#ifdef UTF8_INPUT_ENABLE
-    } else if (input_f == UTF8_INPUT) {
-        set_iconv(-TRUE, w_iconv);
-    } else if (input_f == UTF16_INPUT) {
-        set_iconv(-TRUE, w_iconv16);
-    } else if (input_f == UTF32_INPUT) {
-        set_iconv(-TRUE, w_iconv32);
-#endif
-    } else {
-        set_iconv(FALSE, e_iconv);
-    }
+    c0 -= 0x80;
+    if (c0 < 0 || sizeof_utf8_to_euc_C2 <= c0) return 1;
+    val = p[c0];
+    if (val == 0) return 1;
+    if (no_cp932ext_f && (
+                         (val>>8) == 0x2D || /* NEC special characters */
+                         val > NKF_INT32_C(0xF300) /* IBM extended characters */
+                        )) return 1;
 
-    {
-        struct input_code *p = input_code_list;
-        while (p->name){
-            status_reinit(p++);
-        }
+    c2 = val >> 8;
+    if (val > 0x7FFF){
+       c2 &= 0x7f;
+       c2 |= PREFIX_EUCG3;
     }
+    if (c2 == SO) c2 = JIS_X_0201_1976_K;
+    c1 = val & 0xFF;
+    if (p2) *p2 = c2;
+    if (p1) *p1 = c1;
+    return 0;
 }
 
-/*
- * Check and Ignore BOM
- */
-void check_bom(FILE *f)
+static int
+unicode_to_jis_common(nkf_char c2, nkf_char c1, nkf_char c0, nkf_char *p2, nkf_char *p1)
 {
-    int c2;
-    switch(c2 = (*i_getc)(f)){
-    case 0x00:
-       if((c2 = (*i_getc)(f)) == 0x00){
-           if((c2 = (*i_getc)(f)) == 0xFE){
-               if((c2 = (*i_getc)(f)) == 0xFF){
-                   if(!input_f){
-                       set_iconv(TRUE, w_iconv32);
-                   }
-                   if (iconv == w_iconv32) {
-                       input_endian = ENDIAN_BIG;
-                       return;
-                   }
-                   (*i_ungetc)(0xFF,f);
-               }else (*i_ungetc)(c2,f);
-               (*i_ungetc)(0xFE,f);
-           }else if(c2 == 0xFF){
-               if((c2 = (*i_getc)(f)) == 0xFE){
-                   if(!input_f){
-                       set_iconv(TRUE, w_iconv32);
-                   }
-                   if (iconv == w_iconv32) {
-                       input_endian = ENDIAN_2143;
-                       return;
-                   }
-                   (*i_ungetc)(0xFF,f);
-               }else (*i_ungetc)(c2,f);
-               (*i_ungetc)(0xFF,f);
-           }else (*i_ungetc)(c2,f);
-           (*i_ungetc)(0x00,f);
-       }else (*i_ungetc)(c2,f);
-       (*i_ungetc)(0x00,f);
-       break;
-    case 0xEF:
-       if((c2 = (*i_getc)(f)) == 0xBB){
-           if((c2 = (*i_getc)(f)) == 0xBF){
-               if(!input_f){
-                   set_iconv(TRUE, w_iconv);
-               }
-               if (iconv == w_iconv) {
-                   return;
-               }
-               (*i_ungetc)(0xBF,f);
-           }else (*i_ungetc)(c2,f);
-           (*i_ungetc)(0xBB,f);
-       }else (*i_ungetc)(c2,f);
-       (*i_ungetc)(0xEF,f);
-       break;
-    case 0xFE:
-       if((c2 = (*i_getc)(f)) == 0xFF){
-           if((c2 = (*i_getc)(f)) == 0x00){
-               if((c2 = (*i_getc)(f)) == 0x00){
-                   if(!input_f){
-                       set_iconv(TRUE, w_iconv32);
-                   }
-                   if (iconv == w_iconv32) {
-                       input_endian = ENDIAN_3412;
-                       return;
+    const unsigned short *const *pp;
+    const unsigned short *const *const *ppp;
+    static const char no_best_fit_chars_table_C2[] =
+    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+       1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+       1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 2, 1, 1, 2,
+       0, 0, 1, 1, 0, 1, 0, 1, 2, 1, 1, 1, 1, 1, 1, 1};
+    static const char no_best_fit_chars_table_C2_ms[] =
+    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+       1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+       1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0,
+       0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0};
+    static const char no_best_fit_chars_table_932_C2[] =
+    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+       1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+       1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1,
+       0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0};
+    static const char no_best_fit_chars_table_932_C3[] =
+    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+       1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1,
+       1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+       1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1};
+    nkf_char ret = 0;
+
+    if(c2 < 0x80){
+       *p2 = 0;
+       *p1 = c2;
+    }else if(c2 < 0xe0){
+       if(no_best_fit_chars_f){
+           if(ms_ucs_map_f == UCS_MAP_CP932){
+               switch(c2){
+               case 0xC2:
+                   if(no_best_fit_chars_table_932_C2[c1&0x3F]) return 1;
+                   break;
+               case 0xC3:
+                   if(no_best_fit_chars_table_932_C3[c1&0x3F]) return 1;
+                   break;
+               }
+           }else if(!cp932inv_f){
+               switch(c2){
+               case 0xC2:
+                   if(no_best_fit_chars_table_C2[c1&0x3F]) return 1;
+                   break;
+               case 0xC3:
+                   if(no_best_fit_chars_table_932_C3[c1&0x3F]) return 1;
+                   break;
+               }
+           }else if(ms_ucs_map_f == UCS_MAP_MS){
+               if(c2 == 0xC2 && no_best_fit_chars_table_C2_ms[c1&0x3F]) return 1;
+           }else if(ms_ucs_map_f == UCS_MAP_CP10001){
+               switch(c2){
+               case 0xC2:
+                   switch(c1){
+                   case 0xA2:
+                   case 0xA3:
+                   case 0xA5:
+                   case 0xA6:
+                   case 0xAC:
+                   case 0xAF:
+                   case 0xB8:
+                       return 1;
                    }
-                   (*i_ungetc)(0x00,f);
-               }else (*i_ungetc)(c2,f);
-               (*i_ungetc)(0x00,f);
-           }else (*i_ungetc)(c2,f);
-           if(!input_f){
-               set_iconv(TRUE, w_iconv16);
-           }
-           if (iconv == w_iconv16) {
-               input_endian = ENDIAN_BIG;
-               return;
+                   break;
+               }
            }
-           (*i_ungetc)(0xFF,f);
-       }else (*i_ungetc)(c2,f);
-       (*i_ungetc)(0xFE,f);
-       break;
-    case 0xFF:
-       if((c2 = (*i_getc)(f)) == 0xFE){
-           if((c2 = (*i_getc)(f)) == 0x00){
-               if((c2 = (*i_getc)(f)) == 0x00){
-                   if(!input_f){
-                       set_iconv(TRUE, w_iconv32);
+       }
+       pp =
+           ms_ucs_map_f == UCS_MAP_CP932 ? utf8_to_euc_2bytes_932 :
+           ms_ucs_map_f == UCS_MAP_MS ? utf8_to_euc_2bytes_ms :
+           ms_ucs_map_f == UCS_MAP_CP10001 ? utf8_to_euc_2bytes_mac :
+           utf8_to_euc_2bytes;
+       ret =  unicode_to_jis_common2(c2, c1, pp, sizeof_utf8_to_euc_2bytes, p2, p1);
+    }else if(c0 < 0xF0){
+       if(no_best_fit_chars_f){
+           if(ms_ucs_map_f == UCS_MAP_CP932){
+               if(c2 == 0xE3 && c1 == 0x82 && c0 == 0x94) return 1;
+           }else if(ms_ucs_map_f == UCS_MAP_MS){
+               switch(c2){
+               case 0xE2:
+                   switch(c1){
+                   case 0x80:
+                       if(c0 == 0x94 || c0 == 0x96 || c0 == 0xBE) return 1;
+                       break;
+                   case 0x88:
+                       if(c0 == 0x92) return 1;
+                       break;
                    }
-                   if (iconv == w_iconv32) {
-                       input_endian = ENDIAN_LITTLE;
-                       return;
+                   break;
+               case 0xE3:
+                   if(c1 == 0x80 || c0 == 0x9C) return 1;
+                   break;
+               }
+           }else if(ms_ucs_map_f == UCS_MAP_CP10001){
+               switch(c2){
+               case 0xE3:
+                   switch(c1){
+                   case 0x82:
+                       if(c0 == 0x94) return 1;
+                       break;
+                   case 0x83:
+                       if(c0 == 0xBB) return 1;
+                       break;
                    }
-                   (*i_ungetc)(0x00,f);
-               }else (*i_ungetc)(c2,f);
-               (*i_ungetc)(0x00,f);
-           }else (*i_ungetc)(c2,f);
-           if(!input_f){
-               set_iconv(TRUE, w_iconv16);
-           }
-           if (iconv == w_iconv16) {
-               input_endian = ENDIAN_LITTLE;
-               return;
+                   break;
+               }
+           }else{
+               switch(c2){
+               case 0xE2:
+                   switch(c1){
+                   case 0x80:
+                       if(c0 == 0x95) return 1;
+                       break;
+                   case 0x88:
+                       if(c0 == 0xA5) return 1;
+                       break;
+                   }
+                   break;
+               case 0xEF:
+                   switch(c1){
+                   case 0xBC:
+                       if(c0 == 0x8D) return 1;
+                       break;
+                   case 0xBD:
+                       if(c0 == 0x9E && !cp932inv_f) return 1;
+                       break;
+                   case 0xBF:
+                       if(0xA0 <= c0 && c0 <= 0xA5) return 1;
+                       break;
+                   }
+                   break;
+               }
            }
-           (*i_ungetc)(0xFE,f);
-       }else (*i_ungetc)(c2,f);
-       (*i_ungetc)(0xFF,f);
-       break;
-    default:
-       (*i_ungetc)(c2,f);
-       break;
+       }
+       ppp =
+           ms_ucs_map_f == UCS_MAP_CP932 ? utf8_to_euc_3bytes_932 :
+           ms_ucs_map_f == UCS_MAP_MS ? utf8_to_euc_3bytes_ms :
+           ms_ucs_map_f == UCS_MAP_CP10001 ? utf8_to_euc_3bytes_mac :
+           utf8_to_euc_3bytes;
+       ret = unicode_to_jis_common2(c1, c0, ppp[c2 - 0xE0], sizeof_utf8_to_euc_C2, p2, p1);
+    }else return -1;
+#ifdef SHIFTJIS_CP932
+    if (!ret && !cp932inv_f && is_eucg3(*p2)) {
+       nkf_char s2, s1;
+       if (e2s_conv(*p2, *p1, &s2, &s1) == 0) {
+           s2e_conv(s2, s1, p2, p1);
+       }else{
+           ret = 1;
+       }
     }
+#endif
+    return ret;
 }
 
-/*
-   Conversion main loop. Code detection only.
- */
-
-nkf_char kanji_convert(FILE *f)
+#ifdef UTF8_OUTPUT_ENABLE
+static nkf_char
+e2w_conv(nkf_char c2, nkf_char c1)
 {
-    nkf_char    c3, c2=0, c1, c0=0;
-    int is_8bit = FALSE;
+    const unsigned short *p;
 
-    if(input_f == SJIS_INPUT || input_f == EUC_INPUT
-#ifdef UTF8_INPUT_ENABLE
-       || input_f == UTF8_INPUT || input_f == UTF16_INPUT
+    if (c2 == JIS_X_0201_1976_K) {
+       if (ms_ucs_map_f == UCS_MAP_CP10001) {
+           switch (c1) {
+           case 0x20:
+               return 0xA0;
+           case 0x7D:
+               return 0xA9;
+           }
+       }
+       p = euc_to_utf8_1byte;
+#ifdef X0212_ENABLE
+    } else if (is_eucg3(c2)){
+       if(ms_ucs_map_f == UCS_MAP_ASCII&& c2 == NKF_INT32_C(0x8F22) && c1 == 0x43){
+           return 0xA6;
+       }
+       c2 = (c2&0x7f) - 0x21;
+       if (0<=c2 && c2<sizeof_euc_to_utf8_2bytes)
+           p = x0212_to_utf8_2bytes[c2];
+       else
+           return 0;
 #endif
-      ){
-       is_8bit = TRUE;
+    } else {
+       c2 &= 0x7f;
+       c2 = (c2&0x7f) - 0x21;
+       if (0<=c2 && c2<sizeof_euc_to_utf8_2bytes)
+           p =
+               ms_ucs_map_f == UCS_MAP_ASCII ? euc_to_utf8_2bytes[c2] :
+               ms_ucs_map_f == UCS_MAP_CP10001 ? euc_to_utf8_2bytes_mac[c2] :
+               euc_to_utf8_2bytes_ms[c2];
+       else
+           return 0;
     }
+    if (!p) return 0;
+    c1 = (c1 & 0x7f) - 0x21;
+    if (0<=c1 && c1<sizeof_euc_to_utf8_1byte)
+       return p[c1];
+    return 0;
+}
+#endif
 
-    input_mode = ASCII;
-    output_mode = ASCII;
-    shift_mode = FALSE;
-
-#define NEXT continue      /* no output, get next */
-#define SEND ;             /* output c1 and c2, get next */
-#define LAST break         /* end of loop, go closing  */
-
-    module_connection();
-    check_bom(f);
+static nkf_char
+w2e_conv(nkf_char c2, nkf_char c1, nkf_char c0, nkf_char *p2, nkf_char *p1)
+{
+    nkf_char ret = 0;
 
-    while ((c1 = (*i_getc)(f)) != EOF) {
-#ifdef INPUT_CODE_FIX
-       if (!input_f)
+    if (!c1){
+       *p2 = 0;
+       *p1 = c2;
+    }else if (0xc0 <= c2 && c2 <= 0xef) {
+       ret =  unicode_to_jis_common(c2, c1, c0, p2, p1);
+#ifdef NUMCHAR_OPTION
+       if (ret > 0){
+           if (p2) *p2 = 0;
+           if (p1) *p1 = nkf_char_unicode_new(nkf_utf8_to_unicode(c2, c1, c0, 0));
+           ret = 0;
+       }
 #endif
-           code_status(c1);
-        if (c2) {
-            /* second byte */
-            if (c2 > ((input_f == JIS_INPUT && ms_ucs_map_f) ? 0x92 : DEL)) {
-                /* in case of 8th bit is on */
-                if (!estab_f&&!mime_decode_mode) {
-                    /* in case of not established yet */
-                    /* It is still ambiguious */
-                    if (h_conv(f, c2, c1)==EOF)
-                        LAST;
-                    else
-                        c2 = 0;
-                    NEXT;
-                } else {
-                   /* in case of already established */
-                   if (c1 < AT) {
-                       /* ignore bogus code and not CP5022x UCD */
-                       c2 = 0;
-                       NEXT;
-                   } else {
-                       SEND;
-                   }
-               }
-            } else
-                /* second byte, 7 bit code */
-                /* it might be kanji shitfted */
-                if ((c1 == DEL) || (c1 <= SP)) {
-                    /* ignore bogus first code */
-                    c2 = 0;
-                    NEXT;
-                } else
-                    SEND;
-        } else {
-            /* first byte */
+    }
+    return ret;
+}
+
 #ifdef UTF8_INPUT_ENABLE
-           if (iconv == w_iconv16) {
-               if (input_endian == ENDIAN_BIG) {
-                   c2 = c1;
-                   if ((c1 = (*i_getc)(f)) != EOF) {
-                       if (0xD8 <= c2 && c2 <= 0xDB) {
-                           if ((c0 = (*i_getc)(f)) != EOF) {
-                               c0 <<= 8;
-                               if ((c3 = (*i_getc)(f)) != EOF) {
-                                   c0 |= c3;
-                               } else c2 = EOF;
-                           } else c2 = EOF;
-                       }
-                   } else c2 = EOF;
-               } else {
-                   if ((c2 = (*i_getc)(f)) != EOF) {
-                       if (0xD8 <= c2 && c2 <= 0xDB) {
-                           if ((c3 = (*i_getc)(f)) != EOF) {
-                               if ((c0 = (*i_getc)(f)) != EOF) {
-                                   c0 <<= 8;
-                                   c0 |= c3;
-                               } else c2 = EOF;
-                           } else c2 = EOF;
-                       }
-                   } else c2 = EOF;
-               }
-               SEND;
-            } else if(iconv == w_iconv32){
-               int c3 = c1;
-               if((c2 = (*i_getc)(f)) != EOF &&
-                  (c1 = (*i_getc)(f)) != EOF &&
-                  (c0 = (*i_getc)(f)) != EOF){
-                   switch(input_endian){
-                   case ENDIAN_BIG:
-                       c1 = (c2&0xFF)<<16 | (c1&0xFF)<<8 | (c0&0xFF);
-                       break;
-                   case ENDIAN_LITTLE:
-                       c1 = (c3&0xFF) | (c2&0xFF)<<8 | (c1&0xFF)<<16;
-                       break;
-                   case ENDIAN_2143:
-                       c1 = (c3&0xFF)<<16 | (c1&0xFF) | (c0&0xFF)<<8;
-                       break;
-                   case ENDIAN_3412:
-                       c1 = (c3&0xFF)<<8 | (c2&0xFF) | (c0&0xFF)<<16;
-                       break;
-                   }
-                   c2 = 0;
-               }else{
-                   c2 = EOF;
-               }
-               SEND;
-            } else
-#endif
-#ifdef NUMCHAR_OPTION
-            if (is_unicode_capsule(c1)){
-                SEND;
-           } else
-#endif
-           if (c1 > ((input_f == JIS_INPUT && ms_ucs_map_f) ? 0x92 : DEL)) {
-                /* 8 bit code */
-                if (!estab_f && !iso8859_f) {
-                    /* not established yet */
-                    c2 = c1;
-                    NEXT;
-                } else { /* estab_f==TRUE */
-                    if (iso8859_f) {
-                        c2 = ISO8859_1;
-                        c1 &= 0x7f;
-                        SEND;
-                    } else if (SSP<=c1 && c1<0xe0 && iconv == s_iconv) {
-                        /* SJIS X0201 Case... */
-                        if(iso2022jp_f && x0201_f==NO_X0201) {
-                            (*oconv)(GETA1, GETA2);
-                            NEXT;
-                        } else {
-                           c2 = X0201;
-                           c1 &= 0x7f;
-                           SEND;
-                       }
-                    } else if (c1==SSO && iconv != s_iconv) {
-                        /* EUC X0201 Case */
-                        c1 = (*i_getc)(f);  /* skip SSO */
-                        code_status(c1);
-                        if (SSP<=c1 && c1<0xe0) {
-                           if(iso2022jp_f &&  x0201_f==NO_X0201) {
-                               (*oconv)(GETA1, GETA2);
-                               NEXT;
-                           } else {
-                               c2 = X0201;
-                               c1 &= 0x7f;
-                               SEND;
-                           }
-                        } else  { /* bogus code, skip SSO and one byte */
-                            NEXT;
-                        }
-                   } else if (ms_ucs_map_f == UCS_MAP_CP10001 &&
-                              (c1 == 0xFD || c1 == 0xFE)) {
-                       /* CP10001 */
-                       c2 = X0201;
-                       c1 &= 0x7f;
-                       SEND;
-                    } else {
-                       /* already established */
-                       c2 = c1;
-                       NEXT;
-                    }
-                }
-            } else if ((c1 > SP) && (c1 != DEL)) {
-                /* in case of Roman characters */
-                if (shift_mode) {
-                    /* output 1 shifted byte */
-                    if (iso8859_f) {
-                        c2 = ISO8859_1;
-                        SEND;
-                    } else if (SP <= c1 && c1 < (0xe0&0x7f)){
-                      /* output 1 shifted byte */
-                       if(iso2022jp_f && x0201_f==NO_X0201) {
-                           (*oconv)(GETA1, GETA2);
-                           NEXT;
-                       } else {
-                           c2 = X0201;
-                           SEND;
-                       }
-                    } else {
-                        /* look like bogus code */
-                        NEXT;
-                    }
-                } else if (input_mode == X0208 || input_mode == X0212 ||
-                          input_mode == X0213_1 || input_mode == X0213_2) {
-                    /* in case of Kanji shifted */
-                    c2 = c1;
-                    NEXT;
-                } else if (c1 == '=' && mime_f && !mime_decode_mode) {
-                    /* Check MIME code */
-                    if ((c1 = (*i_getc)(f)) == EOF) {
-                        (*oconv)(0, '=');
-                        LAST;
-                    } else if (c1 == '?') {
-                        /* =? is mime conversion start sequence */
-                       if(mime_f == STRICT_MIME) {
-                           /* check in real detail */
-                           if (mime_begin_strict(f) == EOF)
-                               LAST;
-                           else
-                               NEXT;
-                       } else if (mime_begin(f) == EOF)
-                            LAST;
-                        else
-                            NEXT;
-                    } else {
-                        (*oconv)(0, '=');
-                        (*i_ungetc)(c1,f);
-                        NEXT;
-                    }
-                } else {
-                    /* normal ASCII code */
-                    SEND;
-                }
-            } else if (c1 == SI && (!is_8bit || mime_decode_mode)) {
-                shift_mode = FALSE;
-                NEXT;
-            } else if (c1 == SO && (!is_8bit || mime_decode_mode)) {
-                shift_mode = TRUE;
-                NEXT;
-            } else if (c1 == ESC && (!is_8bit || mime_decode_mode)) {
-                if ((c1 = (*i_getc)(f)) == EOF) {
-                    /*  (*oconv)(0, ESC); don't send bogus code */
-                    LAST;
-                } else if (c1 == '$') {
-                    if ((c1 = (*i_getc)(f)) == EOF) {
-                        /*
-                        (*oconv)(0, ESC); don't send bogus code
-                        (*oconv)(0, '$'); */
-                        LAST;
-                    } else if (c1 == '@'|| c1 == 'B') {
-                        /* This is kanji introduction */
-                        input_mode = X0208;
-                        shift_mode = FALSE;
-                        set_input_codename("ISO-2022-JP");
-#ifdef CHECK_OPTION
-                        debug("ISO-2022-JP");
-#endif
-                        NEXT;
-                    } else if (c1 == '(') {
-                        if ((c1 = (*i_getc)(f)) == EOF) {
-                            /* don't send bogus code
-                            (*oconv)(0, ESC);
-                            (*oconv)(0, '$');
-                            (*oconv)(0, '(');
-                                */
-                            LAST;
-                        } else if (c1 == '@'|| c1 == 'B') {
-                            /* This is kanji introduction */
-                            input_mode = X0208;
-                            shift_mode = FALSE;
-                            NEXT;
-#ifdef X0212_ENABLE
-                        } else if (c1 == 'D'){
-                            input_mode = X0212;
-                            shift_mode = FALSE;
-                            NEXT;
-#endif /* X0212_ENABLE */
-                        } else if (c1 == (X0213_1&0x7F)){
-                            input_mode = X0213_1;
-                            shift_mode = FALSE;
-                            NEXT;
-                        } else if (c1 == (X0213_2&0x7F)){
-                            input_mode = X0213_2;
-                            shift_mode = FALSE;
-                            NEXT;
-                        } else {
-                            /* could be some special code */
-                            (*oconv)(0, ESC);
-                            (*oconv)(0, '$');
-                            (*oconv)(0, '(');
-                            (*oconv)(0, c1);
-                            NEXT;
-                        }
-                    } else if (broken_f&0x2) {
-                        /* accept any ESC-(-x as broken code ... */
-                        input_mode = X0208;
-                        shift_mode = FALSE;
-                        NEXT;
-                    } else {
-                        (*oconv)(0, ESC);
-                        (*oconv)(0, '$');
-                        (*oconv)(0, c1);
-                        NEXT;
-                    }
-                } else if (c1 == '(') {
-                    if ((c1 = (*i_getc)(f)) == EOF) {
-                        /* don't send bogus code
-                        (*oconv)(0, ESC);
-                        (*oconv)(0, '('); */
-                        LAST;
-                    } else {
-                        if (c1 == 'I') {
-                            /* This is X0201 kana introduction */
-                            input_mode = X0201; shift_mode = X0201;
-                            NEXT;
-                        } else if (c1 == 'B' || c1 == 'J' || c1 == 'H') {
-                            /* This is X0208 kanji introduction */
-                            input_mode = ASCII; shift_mode = FALSE;
-                            NEXT;
-                        } else if (broken_f&0x2) {
-                            input_mode = ASCII; shift_mode = FALSE;
-                            NEXT;
-                        } else {
-                            (*oconv)(0, ESC);
-                            (*oconv)(0, '(');
-                            /* maintain various input_mode here */
-                            SEND;
-                        }
-                    }
-               } else if ( c1 == 'N' || c1 == 'n'){
-                   /* SS2 */
-                   c3 = (*i_getc)(f);  /* skip SS2 */
-                   if ( (SP<=c3 && c3 < 0x60) || (0xa0<=c3 && c3 < 0xe0)){
-                       c1 = c3;
-                       c2 = X0201;
-                       SEND;
-                   }else{
-                       (*i_ungetc)(c3, f);
-                       /* lonely ESC  */
-                       (*oconv)(0, ESC);
-                       SEND;
-                   }
-                } else {
-                    /* lonely ESC  */
-                    (*oconv)(0, ESC);
-                    SEND;
-                }
-           } else if (c1 == ESC && iconv == s_iconv) {
-               /* ESC in Shift_JIS */
-               if ((c1 = (*i_getc)(f)) == EOF) {
-                   /*  (*oconv)(0, ESC); don't send bogus code */
-                   LAST;
-               } else if (c1 == '$') {
-                   /* J-PHONE emoji */
-                   if ((c1 = (*i_getc)(f)) == EOF) {
-                       /*
-                          (*oconv)(0, ESC); don't send bogus code
-                          (*oconv)(0, '$'); */
-                       LAST;
-                   } else {
-                       if (('E' <= c1 && c1 <= 'G') ||
-                           ('O' <= c1 && c1 <= 'Q')) {
-                           /*
-                              NUM : 0 1 2 3 4 5
-                              BYTE: G E F O P Q
-                              C%7 : 1 6 0 2 3 4
-                              C%7 : 0 1 2 3 4 5 6
-                              NUM : 2 0 3 4 5 X 1
-                            */
-                           static const char jphone_emoji_first_table[7] = {2, 0, 3, 4, 5, 0, 1};
-                           c0 = (jphone_emoji_first_table[c1 % 7] << 8) - SP + 0xE000 + CLASS_UNICODE;
-                           while ((c1 = (*i_getc)(f)) != EOF) {
-                               if (SP <= c1 && c1 <= 'z') {
-                                   (*oconv)(0, c1 + c0);
-                               } else break; /* c1 == SO */
-                           }
-                       }
-                   }
-                   if (c1 == EOF) LAST;
-                   NEXT;
-               } else {
-                   /* lonely ESC  */
-                   (*oconv)(0, ESC);
-                   SEND;
-               }
-           } else if (c1 == LF || c1 == CR) {
-               if (broken_f&4) {
-                   input_mode = ASCII; set_iconv(FALSE, 0);
-                   SEND;
-               } else if (mime_decode_f && !mime_decode_mode){
-                   if (c1 == LF) {
-                       if ((c1=(*i_getc)(f))!=EOF && c1 == SP) {
-                           i_ungetc(SP,f);
-                           continue;
-                       } else {
-                           i_ungetc(c1,f);
-                       }
-                       c1 = LF;
-                       SEND;
-                   } else  { /* if (c1 == CR)*/
-                       if ((c1=(*i_getc)(f))!=EOF) {
-                           if (c1==SP) {
-                               i_ungetc(SP,f);
-                               continue;
-                           } else if (c1 == LF && (c1=(*i_getc)(f))!=EOF && c1 == SP) {
-                               i_ungetc(SP,f);
-                               continue;
-                           } else {
-                               i_ungetc(c1,f);
-                           }
-                           i_ungetc(LF,f);
-                       } else {
-                           i_ungetc(c1,f);
-                       }
-                       c1 = CR;
-                       SEND;
-                   }
-               }
-           } else if (c1 == DEL && input_mode == X0208) {
-               /* CP5022x */
-               c2 = c1;
-               NEXT;
-           } else
-                SEND;
-        }
-        /* send: */
-       switch(input_mode){
-       case ASCII:
-           switch ((*iconv)(c2, c1, c0)) {  /* can be EUC / SJIS / UTF-8 / UTF-16 */
-           case -2:
-               /* 4 bytes UTF-8 */
-               if ((c0 = (*i_getc)(f)) != EOF) {
-                   code_status(c0);
-                   c0 <<= 8;
-                   if ((c3 = (*i_getc)(f)) != EOF) {
-                       code_status(c3);
-                       (*iconv)(c2, c1, c0|c3);
-                   }
-               }
-               break;
-           case -1:
-               /* 3 bytes EUC or UTF-8 */
-               if ((c0 = (*i_getc)(f)) != EOF) {
-                   code_status(c0);
-                   (*iconv)(c2, c1, c0);
-               }
-               break;
-           }
-           break;
-       case X0208:
-       case X0213_1:
-           if (ms_ucs_map_f &&
-               0x7F <= c2 && c2 <= 0x92 &&
-               0x21 <= c1 && c1 <= 0x7E) {
-               /* CP932 UDC */
-               if(c1 == 0x7F) return 0;
-               c1 = (c2 - 0x7F) * 94 + c1 - 0x21 + 0xE000 + CLASS_UNICODE;
-               c2 = 0;
-           }
-           (*oconv)(c2, c1); /* this is JIS, not SJIS/EUC case */
-           break;
-#ifdef X0212_ENABLE
-       case X0212:
-           (*oconv)(PREFIX_EUCG3 | c2, c1);
-           break;
-#endif /* X0212_ENABLE */
-       case X0213_2:
-           (*oconv)(PREFIX_EUCG3 | c2, c1);
-           break;
-       default:
-           (*oconv)(input_mode, c1);  /* other special case */
-       }
-
-        c2 = 0;
-        c0 = 0;
-        continue;
-        /* goto next_word */
-    }
-
-    /* epilogue */
-    (*iconv)(EOF, 0, 0);
-    if (!input_codename)
-    {
-       if (is_8bit) {
-           struct input_code *p = input_code_list;
-           struct input_code *result = p;
-           while (p->name){
-               if (p->score < result->score) result = p;
-               ++p;
-           }
-           set_input_codename(result->name);
-#ifdef CHECK_OPTION
-           debug(result->name);
-#endif
-       }
-    }
-    return 1;
-}
-
-nkf_char
-h_conv(FILE *f, nkf_char c2, nkf_char c1)
+static nkf_char
+w16e_conv(nkf_char val, nkf_char *p2, nkf_char *p1)
 {
-    nkf_char ret, c3, c0;
-    int hold_index;
-
-
-    /** it must NOT be in the kanji shifte sequence      */
-    /** it must NOT be written in JIS7                   */
-    /** and it must be after 2 byte 8bit code            */
-
-    hold_count = 0;
-    push_hold_buf(c2);
-    push_hold_buf(c1);
-
-    while ((c1 = (*i_getc)(f)) != EOF) {
-        if (c1 == ESC){
-           (*i_ungetc)(c1,f);
-            break;
-        }
-        code_status(c1);
-        if (push_hold_buf(c1) == EOF || estab_f){
-            break;
-        }
-    }
-
-    if (!estab_f){
-        struct input_code *p = input_code_list;
-        struct input_code *result = p;
-        if (c1 == EOF){
-            code_status(c1);
-        }
-        while (p->name){
-            if (p->status_func && p->score < result->score){
-                result = p;
-            }
-            ++p;
-        }
-        set_iconv(TRUE, result->iconv_func);
+    nkf_char c1, c2, c3, c4;
+    nkf_char ret = 0;
+    val &= VALUE_MASK;
+    if (val < 0x80) {
+       *p2 = 0;
+       *p1 = val;
     }
-
-
-    /** now,
-     ** 1) EOF is detected, or
-     ** 2) Code is established, or
-     ** 3) Buffer is FULL (but last word is pushed)
-     **
-     ** in 1) and 3) cases, we continue to use
-     ** Kanji codes by oconv and leave estab_f unchanged.
-     **/
-
-    ret = c1;
-    hold_index = 0;
-    while (hold_index < hold_count){
-        c2 = hold_buf[hold_index++];
-        if (c2 <= DEL
-#ifdef NUMCHAR_OPTION
-            || is_unicode_capsule(c2)
-#endif
-            ){
-            (*iconv)(0, c2, 0);
-            continue;
-        }else if (iconv == s_iconv && 0xa1 <= c2 && c2 <= 0xdf){
-            (*iconv)(X0201, c2, 0);
-            continue;
-        }
-        if (hold_index < hold_count){
-            c1 = hold_buf[hold_index++];
-        }else{
-            c1 = (*i_getc)(f);
-            if (c1 == EOF){
-                c3 = EOF;
-                break;
-            }
-            code_status(c1);
-        }
-        c0 = 0;
-        switch ((*iconv)(c2, c1, 0)) {  /* can be EUC/SJIS/UTF-8 */
-       case -2:
-           /* 4 bytes UTF-8 */
-            if (hold_index < hold_count){
-                c0 = hold_buf[hold_index++];
-            } else if ((c0 = (*i_getc)(f)) == EOF) {
-               ret = EOF;
-               break;
-           } else {
-                code_status(c0);
-               c0 <<= 8;
-               if (hold_index < hold_count){
-                   c3 = hold_buf[hold_index++];
-               } else if ((c3 = (*i_getc)(f)) == EOF) {
-                   c0 = ret = EOF;
-                   break;
-               } else {
-                   code_status(c3);
-                   (*iconv)(c2, c1, c0|c3);
-               }
-            }
-           break;
-       case -1:
-           /* 3 bytes EUC or UTF-8 */
-            if (hold_index < hold_count){
-                c0 = hold_buf[hold_index++];
-            } else if ((c0 = (*i_getc)(f)) == EOF) {
-               ret = EOF;
-               break;
-           } else {
-                code_status(c0);
-            }
-            (*iconv)(c2, c1, c0);
-            break;
+    else if (nkf_char_unicode_bmp_p(val)){
+       nkf_unicode_to_utf8(val, &c1, &c2, &c3, &c4);
+       ret =  unicode_to_jis_common(c1, c2, c3, p2, p1);
+       if (ret > 0){
+           *p2 = 0;
+           *p1 = nkf_char_unicode_new(val);
+           ret = 0;
        }
-       if (c0 == EOF) break;
+    }
+    else {
+       *p2 = 0;
+       *p1 = nkf_char_unicode_new(val);
     }
     return ret;
 }
-
-nkf_char push_hold_buf(nkf_char c2)
-{
-    if (hold_count >= HOLD_SIZE*2)
-        return (EOF);
-    hold_buf[hold_count++] = (unsigned char)c2;
-    return ((hold_count >= HOLD_SIZE*2) ? EOF : hold_count);
-}
-
-nkf_char s2e_conv(nkf_char c2, nkf_char c1, nkf_char *p2, nkf_char *p1)
-{
-#if defined(SHIFTJIS_CP932) || defined(X0212_ENABLE)
-    nkf_char val;
-#endif
-    static const char shift_jisx0213_s1a3_table[5][2] ={ { 1, 8}, { 3, 4}, { 5,12}, {13,14}, {15, 0} };
-#ifdef SHIFTJIS_CP932
-    if (!cp932inv_f && is_ibmext_in_sjis(c2)){
-        val = shiftjis_cp932[c2 - CP932_TABLE_BEGIN][c1 - 0x40];
-        if (val){
-            c2 = val >> 8;
-            c1 = val & 0xff;
-        }
-    }
-    if (cp932inv_f
-        && CP932INV_TABLE_BEGIN <= c2 && c2 <= CP932INV_TABLE_END){
-        nkf_char c = cp932inv[c2 - CP932INV_TABLE_BEGIN][c1 - 0x40];
-        if (c){
-            c2 = c >> 8;
-            c1 = c & 0xff;
-        }
-    }
-#endif /* SHIFTJIS_CP932 */
-#ifdef X0212_ENABLE
-    if (!x0213_f && is_ibmext_in_sjis(c2)){
-        val = shiftjis_x0212[c2 - 0xfa][c1 - 0x40];
-        if (val){
-            if (val > 0x7FFF){
-                c2 = PREFIX_EUCG3 | ((val >> 8) & 0x7f);
-                c1 = val & 0xff;
-            }else{
-                c2 = val >> 8;
-                c1 = val & 0xff;
-            }
-            if (p2) *p2 = c2;
-            if (p1) *p1 = c1;
-            return 0;
-        }
-    }
-#endif
-    if(c2 >= 0x80){
-       if(x0213_f && c2 >= 0xF0){
-           if(c2 <= 0xF3 || (c2 == 0xF4 && c1 < 0x9F)){ /* k=1, 3<=k<=5, k=8, 12<=k<=15 */
-               c2 = PREFIX_EUCG3 | 0x20 | shift_jisx0213_s1a3_table[c2 - 0xF0][0x9E < c1];
-           }else{ /* 78<=k<=94 */
-               c2 = PREFIX_EUCG3 | (c2 * 2 - 0x17B);
-               if (0x9E < c1) c2++;
-           }
-       }else{
-           c2 = c2 + c2 - ((c2 <= 0x9F) ? SJ0162 : SJ6394);
-           if (0x9E < c1) c2++;
-       }
-       if (c1 < 0x9F)
-           c1 = c1 - ((c1 > DEL) ? SP : 0x1F);
-       else {
-           c1 = c1 - 0x7E;
-       }
-    }
-
-#ifdef X0212_ENABLE
-    c2 = x0212_unshift(c2);
 #endif
-    if (p2) *p2 = c2;
-    if (p1) *p1 = c1;
-    return 0;
-}
-
-nkf_char s_iconv(nkf_char c2, nkf_char c1, nkf_char c0)
-{
-    if (c2 == X0201) {
-       c1 &= 0x7f;
-    } else if ((c2 == EOF) || (c2 == 0) || c2 < SP) {
-        /* NOP */
-    } else if (!x0213_f && 0xF0 <= c2 && c2 <= 0xF9 && 0x40 <= c1 && c1 <= 0xFC) {
-       /* CP932 UDC */
-       if(c1 == 0x7F) return 0;
-       c1 = (c2 - 0xF0) * 188 + (c1 - 0x40 - (0x7E < c1)) + 0xE000 + CLASS_UNICODE;
-       c2 = 0;
-    } else {
-        nkf_char ret = s2e_conv(c2, c1, &c2, &c1);
-        if (ret) return ret;
-    }
-    (*oconv)(c2, c1);
-    return 0;
-}
 
-nkf_char e_iconv(nkf_char c2, nkf_char c1, nkf_char c0)
+static nkf_char
+e_iconv(nkf_char c2, nkf_char c1, nkf_char c0)
 {
-    if (c2 == X0201) {
-       c1 &= 0x7f;
+    if (c2 == JIS_X_0201_1976_K || c2 == SS2){
+       if (iso2022jp_f && !x0201_f) {
+           c2 = GETA1; c1 = GETA2;
+       } else {
+           c2 = JIS_X_0201_1976_K;
+           c1 &= 0x7f;
+       }
 #ifdef X0212_ENABLE
     }else if (c2 == 0x8f){
-        if (c0 == 0){
-            return -1;
-        }
+       if (c0 == 0){
+           return -1;
+       }
        if (!cp51932_f && !x0213_f && 0xF5 <= c1 && c1 <= 0xFE && 0xA1 <= c0 && c0 <= 0xFE) {
            /* encoding is eucJP-ms, so invert to Unicode Private User Area */
-           c1 = (c1 - 0xF5) * 94 + c0 - 0xA1 + 0xE3AC + CLASS_UNICODE;
+           c1 = nkf_char_unicode_new((c1 - 0xF5) * 94 + c0 - 0xA1 + 0xE3AC);
            c2 = 0;
        } else {
            c2 = (c2 << 8) | (c1 & 0x7f);
@@ -3263,17 +2038,14 @@ nkf_char e_iconv(nkf_char c2, nkf_char c1, nkf_char c0)
                }
            }
 #endif /* SHIFTJIS_CP932 */
-        }
+       }
 #endif /* X0212_ENABLE */
-    } else if (c2 == SSO){
-        c2 = X0201;
-        c1 &= 0x7f;
-    } else if ((c2 == EOF) || (c2 == 0) || c2 < SP) {
-        /* NOP */
+    } else if ((c2 == EOF) || (c2 == 0) || c2 < SP || c2 == ISO_8859_1) {
+       /* NOP */
     } else {
        if (!cp51932_f && ms_ucs_map_f && 0xF5 <= c2 && c2 <= 0xFE && 0xA1 <= c1 && c1 <= 0xFE) {
            /* encoding is eucJP-ms, so invert to Unicode Private User Area */
-           c1 = (c2 - 0xF5) * 94 + c1 - 0xA1 + 0xE000 + CLASS_UNICODE;
+           c1 = nkf_char_unicode_new((c2 - 0xF5) * 94 + c1 - 0xA1 + 0xE000);
            c2 = 0;
        } else {
            c1 &= 0x7f;
@@ -3290,36 +2062,40 @@ nkf_char e_iconv(nkf_char c2, nkf_char c1, nkf_char c0)
                }
            }
 #endif /* SHIFTJIS_CP932 */
-        }
+       }
     }
     (*oconv)(c2, c1);
     return 0;
 }
 
-#ifdef UTF8_INPUT_ENABLE
-nkf_char w2e_conv(nkf_char c2, nkf_char c1, nkf_char c0, nkf_char *p2, nkf_char *p1)
+static nkf_char
+s_iconv(nkf_char c2, nkf_char c1, nkf_char c0)
 {
-    nkf_char ret = 0;
-
-    if (!c1){
-        *p2 = 0;
-        *p1 = c2;
-    }else if (0xc0 <= c2 && c2 <= 0xef) {
-       ret =  unicode_to_jis_common(c2, c1, c0, p2, p1);
-#ifdef NUMCHAR_OPTION
-        if (ret > 0){
-            if (p2) *p2 = 0;
-            if (p1) *p1 = CLASS_UNICODE | ww16_conv(c2, c1, c0);
-            ret = 0;
-        }
-#endif
-    }
-    return ret;
+    if (c2 == JIS_X_0201_1976_K || (0xA1 <= c2 && c2 <= 0xDF)) {
+       if (iso2022jp_f && !x0201_f) {
+           c2 = GETA1; c1 = GETA2;
+       } else {
+           c1 &= 0x7f;
+       }
+    } else if ((c2 == EOF) || (c2 == 0) || c2 < SP) {
+       /* NOP */
+    } else if (!x0213_f && 0xF0 <= c2 && c2 <= 0xF9 && 0x40 <= c1 && c1 <= 0xFC) {
+       /* CP932 UDC */
+       if(c1 == 0x7F) return 0;
+       c1 = nkf_char_unicode_new((c2 - 0xF0) * 188 + (c1 - 0x40 - (0x7E < c1)) + 0xE000);
+       c2 = 0;
+    } else {
+       nkf_char ret = s2e_conv(c2, c1, &c2, &c1);
+       if (ret) return ret;
+    }
+    (*oconv)(c2, c1);
+    return 0;
 }
 
-nkf_char w_iconv(nkf_char c2, nkf_char c1, nkf_char c0)
+static nkf_char
+w_iconv(nkf_char c1, nkf_char c2, nkf_char c3)
 {
-    nkf_char ret = 0;
+    nkf_char ret = 0, c4 = 0;
     static const char w_iconv_utf8_1st_byte[] =
     { /* 0xC0 - 0xFF */
        20, 20, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
@@ -3327,45 +2103,50 @@ nkf_char w_iconv(nkf_char c2, nkf_char c1, nkf_char c0)
        30, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 32, 33, 33,
        40, 41, 41, 41, 42, 43, 43, 43, 50, 50, 50, 50, 60, 60, 70, 70};
 
-    if (c2 < 0 || 0xff < c2) {
-    }else if (c2 == 0) { /* 0 : 1 byte*/
-       c0 = 0;
-    } else if ((c2 & 0xc0) == 0x80) { /* 0x80-0xbf : trail byte */
+    if (c3 > 0xFF) {
+       c4 = c3 & 0xFF;
+       c3 >>= 8;
+    }
+
+    if (c1 < 0 || 0xff < c1) {
+    }else if (c1 == 0) { /* 0 : 1 byte*/
+       c3 = 0;
+    } else if ((c1 & 0xC0) == 0x80) { /* 0x80-0xbf : trail byte */
        return 0;
     } else{
-       switch (w_iconv_utf8_1st_byte[c2 - 0xC0]) {
+       switch (w_iconv_utf8_1st_byte[c1 - 0xC0]) {
        case 21:
-           if (c1 < 0x80 || 0xBF < c1) return 0;
+           if (c2 < 0x80 || 0xBF < c2) return 0;
            break;
        case 30:
-           if (c0 == 0) return -1;
-           if (c1 < 0xA0 || 0xBF < c1 || (c0 & 0xc0) != 0x80)
+           if (c3 == 0) return -1;
+           if (c2 < 0xA0 || 0xBF < c2 || (c3 & 0xC0) != 0x80)
                return 0;
            break;
        case 31:
        case 33:
-           if (c0 == 0) return -1;
-           if ((c1 & 0xc0) != 0x80 || (c0 & 0xc0) != 0x80)
+           if (c3 == 0) return -1;
+           if ((c2 & 0xC0) != 0x80 || (c3 & 0xC0) != 0x80)
                return 0;
            break;
        case 32:
-           if (c0 == 0) return -1;
-           if (c1 < 0x80 || 0x9F < c1 || (c0 & 0xc0) != 0x80)
+           if (c3 == 0) return -1;
+           if (c2 < 0x80 || 0x9F < c2 || (c3 & 0xC0) != 0x80)
                return 0;
            break;
        case 40:
-           if (c0 == 0) return -2;
-           if (c1 < 0x90 || 0xBF < c1 || (c0 & 0xc0c0) != 0x8080)
+           if (c3 == 0) return -2;
+           if (c2 < 0x90 || 0xBF < c2 || (c3 & 0xC0) != 0x80 || (c4 & 0xC0) != 0x80)
                return 0;
            break;
        case 41:
-           if (c0 == 0) return -2;
-           if (c1 < 0x80 || 0xBF < c1 || (c0 & 0xc0c0) != 0x8080)
+           if (c3 == 0) return -2;
+           if (c2 < 0x80 || 0xBF < c2 || (c3 & 0xC0) != 0x80 || (c4 & 0xC0) != 0x80)
                return 0;
            break;
        case 42:
-           if (c0 == 0) return -2;
-           if (c1 < 0x80 || 0x8F < c1 || (c0 & 0xc0c0) != 0x8080)
+           if (c3 == 0) return -2;
+           if (c2 < 0x80 || 0x8F < c2 || (c3 & 0xC0) != 0x80 || (c4 & 0xC0) != 0x80)
                return 0;
            break;
        default:
@@ -3373,628 +2154,231 @@ nkf_char w_iconv(nkf_char c2, nkf_char c1, nkf_char c0)
            break;
        }
     }
-    if (c2 == 0 || c2 == EOF){
-    } else if ((c2 & 0xf8) == 0xf0) { /* 4 bytes */
-       c1 = CLASS_UNICODE | ww16_conv(c2, c1, c0);
-       c2 = 0;
+    if (c1 == 0 || c1 == EOF){
+    } else if ((c1 & 0xf8) == 0xf0) { /* 4 bytes */
+       c2 = nkf_char_unicode_new(nkf_utf8_to_unicode(c1, c2, c3, c4));
+       c1 = 0;
     } else {
-       ret = w2e_conv(c2, c1, c0, &c2, &c1);
+       ret = w2e_conv(c1, c2, c3, &c1, &c2);
     }
     if (ret == 0){
-        (*oconv)(c2, c1);
+       (*oconv)(c1, c2);
     }
     return ret;
 }
-#endif
 
-#if defined(UTF8_INPUT_ENABLE) || defined(UTF8_OUTPUT_ENABLE)
-void w16w_conv(nkf_char val, nkf_char *p2, nkf_char *p1, nkf_char *p0)
+#define NKF_ICONV_INVALID_CODE_RANGE -13
+static size_t
+unicode_iconv(nkf_char wc)
 {
-    val &= VALUE_MASK;
-    if (val < 0x80){
-        *p2 = val;
-        *p1 = 0;
-        *p0 = 0;
-    }else if (val < 0x800){
-       *p2 = 0xc0 | (val >> 6);
-       *p1 = 0x80 | (val & 0x3f);
-        *p0 = 0;
-    } else if (val <= NKF_INT32_C(0xFFFF)) {
-        *p2 = 0xe0 | (val >> 12);
-        *p1 = 0x80 | ((val >> 6) & 0x3f);
-        *p0 = 0x80 | (val        & 0x3f);
-    } else if (val <= NKF_INT32_C(0x10FFFF)) {
-        *p2 = 0xe0 |  (val >> 16);
-        *p1 = 0x80 | ((val >> 12) & 0x3f);
-        *p0 = 0x8080 | ((val << 2) & 0x3f00)| (val & 0x3f);
+    nkf_char c1, c2;
+    int ret = 0;
+
+    if (wc < 0x80) {
+       c2 = 0;
+       c1 = wc;
+    }else if ((wc>>11) == 27) {
+       /* unpaired surrogate */
+       return NKF_ICONV_INVALID_CODE_RANGE;
+    }else if (wc < 0xFFFF) {
+       ret = w16e_conv(wc, &c2, &c1);
+       if (ret) return ret;
+    }else if (wc < 0x10FFFF) {
+       c2 = 0;
+       c1 = nkf_char_unicode_new(wc);
     } else {
-        *p2 = 0;
-        *p1 = 0;
-        *p0 = 0;
+       return NKF_ICONV_INVALID_CODE_RANGE;
     }
+    (*oconv)(c2, c1);
+    return 0;
 }
-#endif
 
-#ifdef UTF8_INPUT_ENABLE
-nkf_char ww16_conv(nkf_char c2, nkf_char c1, nkf_char c0)
+#define NKF_ICONV_NEED_ONE_MORE_BYTE -1
+#define NKF_ICONV_NEED_TWO_MORE_BYTES -2
+#define UTF16_TO_UTF32(lead, trail) (((lead) << 10) + (trail) - NKF_INT32_C(0x35FDC00))
+static size_t
+nkf_iconv_utf_16(nkf_char c1, nkf_char c2, nkf_char c3, nkf_char c4)
 {
-    nkf_char val;
-    if (c2 >= 0xf8) {
-       val = -1;
-    } else if (c2 >= 0xf0){
-       /* c2: 1st, c1: 2nd, c0: 3rd/4th */
-       val = (c2 & 0x0f) << 18;
-        val |= (c1 & 0x3f) << 12;
-        val |= (c0 & 0x3f00) >> 2;
-        val |= (c0 & 0x3f);
-    }else if (c2 >= 0xe0){
-        val = (c2 & 0x0f) << 12;
-        val |= (c1 & 0x3f) << 6;
-        val |= (c0 & 0x3f);
-    }else if (c2 >= 0xc0){
-        val = (c2 & 0x1f) << 6;
-        val |= (c1 & 0x3f);
-    }else{
-        val = c2;
+    nkf_char wc;
+
+    if (c1 == EOF) {
+       (*oconv)(EOF, 0);
+       return 0;
     }
-    return val;
-}
 
-nkf_char w16e_conv(nkf_char val, nkf_char *p2, nkf_char *p1)
-{
-    nkf_char c2, c1, c0;
-    nkf_char ret = 0;
-    val &= VALUE_MASK;
-    if (val < 0x80){
-        *p2 = 0;
-        *p1 = val;
-    }else{
-       w16w_conv(val, &c2, &c1, &c0);
-       ret =  unicode_to_jis_common(c2, c1, c0, p2, p1);
-#ifdef NUMCHAR_OPTION
-       if (ret > 0){
-           *p2 = 0;
-           *p1 = CLASS_UNICODE | val;
-           ret = 0;
+    if (input_endian == ENDIAN_BIG) {
+       if (0xD8 <= c1 && c1 <= 0xDB) {
+           if (0xDC <= c3 && c3 <= 0xDF) {
+               wc = UTF16_TO_UTF32(c1 << 8 | c2, c3 << 8 | c4);
+           } else return NKF_ICONV_NEED_TWO_MORE_BYTES;
+       } else {
+           wc = c1 << 8 | c2;
+       }
+    } else {
+       if (0xD8 <= c2 && c2 <= 0xDB) {
+           if (0xDC <= c4 && c4 <= 0xDF) {
+               wc = UTF16_TO_UTF32(c2 << 8 | c1, c4 << 8 | c3);
+           } else return NKF_ICONV_NEED_TWO_MORE_BYTES;
+       } else {
+           wc = c2 << 8 | c1;
        }
-#endif
     }
-    return ret;
+
+    return (*unicode_iconv)(wc);
 }
-#endif
 
-#ifdef UTF8_INPUT_ENABLE
-nkf_char w_iconv16(nkf_char c2, nkf_char c1, nkf_char c0)
+static nkf_char
+w_iconv16(nkf_char c2, nkf_char c1, nkf_char c0)
 {
-    nkf_char ret = 0;
-    if ((c2==0 && c1 < 0x80) || c2==EOF) {
-       (*oconv)(c2, c1);
-       return 0;
-    }else if (0xD8 <= c2 && c2 <= 0xDB) {
-       if (c0 < NKF_INT32_C(0xDC00) || NKF_INT32_C(0xDFFF) < c0)
-           return -2;
-       c1 =  CLASS_UNICODE | ((c2 << 18) + (c1 << 10) + c0 - NKF_INT32_C(0x35FDC00));
-       c2 = 0;
-    }else if ((c2>>3) == 27) { /* unpaired surrogate */
-       /*
-          return 2;
-       */
-       return 1;
-    }else ret = w16e_conv(((c2 & 0xff)<<8) + c1, &c2, &c1);
-    if (ret) return ret;
-    (*oconv)(c2, c1);
     return 0;
 }
 
-nkf_char w_iconv32(nkf_char c2, nkf_char c1, nkf_char c0)
+static nkf_char
+w_iconv32(nkf_char c2, nkf_char c1, nkf_char c0)
 {
-    int ret = 0;
-
-    if ((c2 == 0 && c1 < 0x80) || c2==EOF) {
-    } else if (is_unicode_bmp(c1)) {
-       ret = w16e_conv(c1, &c2, &c1);
-    } else {
-       c2 = 0;
-       c1 =  CLASS_UNICODE | c1;
-    }
-    if (ret) return ret;
-    (*oconv)(c2, c1);
     return 0;
 }
 
-nkf_char unicode_to_jis_common(nkf_char c2, nkf_char c1, nkf_char c0, nkf_char *p2, nkf_char *p1)
+static size_t
+nkf_iconv_utf_32(nkf_char c1, nkf_char c2, nkf_char c3, nkf_char c4)
 {
-    const unsigned short *const *pp;
-    const unsigned short *const *const *ppp;
-    static const char no_best_fit_chars_table_C2[] =
-    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-       1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-       1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 2, 1, 1, 2,
-       0, 0, 1, 1, 0, 1, 0, 1, 2, 1, 1, 1, 1, 1, 1, 1};
-    static const char no_best_fit_chars_table_C2_ms[] =
-    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-       1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-       1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0,
-       0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0};
-    static const char no_best_fit_chars_table_932_C2[] =
-    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-       1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-       1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1,
-       0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0};
-    static const char no_best_fit_chars_table_932_C3[] =
-    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-       1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1,
-       1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-       1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1};
-    nkf_char ret = 0;
+    nkf_char wc;
 
-    if(c2 < 0x80){
-       *p2 = 0;
-       *p1 = c2;
-    }else if(c2 < 0xe0){
-       if(no_best_fit_chars_f){
-           if(ms_ucs_map_f == UCS_MAP_CP932){
-               switch(c2){
-               case 0xC2:
-                   if(no_best_fit_chars_table_932_C2[c1&0x3F]) return 1;
-                   break;
-               case 0xC3:
-                   if(no_best_fit_chars_table_932_C3[c1&0x3F]) return 1;
-                   break;
-               }
-           }else if(!cp932inv_f){
-               switch(c2){
-               case 0xC2:
-                   if(no_best_fit_chars_table_C2[c1&0x3F]) return 1;
-                   break;
-               case 0xC3:
-                   if(no_best_fit_chars_table_932_C3[c1&0x3F]) return 1;
-                   break;
-               }
-           }else if(ms_ucs_map_f == UCS_MAP_MS){
-               if(c2 == 0xC2 && no_best_fit_chars_table_C2_ms[c1&0x3F]) return 1;
-           }else if(ms_ucs_map_f == UCS_MAP_CP10001){
-               switch(c2){
-               case 0xC2:
-                   switch(c1){
-                   case 0xA2:
-                   case 0xA3:
-                   case 0xA5:
-                   case 0xA6:
-                   case 0xAC:
-                   case 0xAF:
-                   case 0xB8:
-                       return 1;
-                   }
-                   break;
-               }
-           }
-       }
-       pp =
-           ms_ucs_map_f == UCS_MAP_CP932 ? utf8_to_euc_2bytes_932 :
-           ms_ucs_map_f == UCS_MAP_MS ? utf8_to_euc_2bytes_ms :
-           ms_ucs_map_f == UCS_MAP_CP10001 ? utf8_to_euc_2bytes_mac :
-           utf8_to_euc_2bytes;
-       ret =  w_iconv_common(c2, c1, pp, sizeof_utf8_to_euc_2bytes, p2, p1);
-    }else if(c0 < 0xF0){
-       if(no_best_fit_chars_f){
-           if(ms_ucs_map_f == UCS_MAP_CP932){
-               if(c2 == 0xE3 && c1 == 0x82 && c0 == 0x94) return 1;
-           }else if(ms_ucs_map_f == UCS_MAP_MS){
-               switch(c2){
-               case 0xE2:
-                   switch(c1){
-                   case 0x80:
-                       if(c0 == 0x94 || c0 == 0x96 || c0 == 0xBE) return 1;
-                       break;
-                   case 0x88:
-                       if(c0 == 0x92) return 1;
-                       break;
-                   }
-                   break;
-               case 0xE3:
-                   if(c1 == 0x80 || c0 == 0x9C) return 1;
-                   break;
-               }
-           }else if(ms_ucs_map_f == UCS_MAP_CP10001){
-               switch(c2){
-               case 0xE3:
-                   switch(c1){
-                   case 0x82:
-                           if(c0 == 0x94) return 1;
-                       break;
-                   case 0x83:
-                           if(c0 == 0xBB) return 1;
-                       break;
-                   }
-                   break;
-               }
-           }else{
-               switch(c2){
-               case 0xE2:
-                   switch(c1){
-                   case 0x80:
-                       if(c0 == 0x95) return 1;
-                       break;
-                   case 0x88:
-                       if(c0 == 0xA5) return 1;
-                       break;
-                   }
-                   break;
-               case 0xEF:
-                   switch(c1){
-                   case 0xBC:
-                       if(c0 == 0x8D) return 1;
-                       break;
-                   case 0xBD:
-                       if(c0 == 0x9E && !cp932inv_f) return 1;
-                       break;
-                   case 0xBF:
-                       if(0xA0 <= c0 && c0 <= 0xA5) return 1;
-                       break;
-                   }
-                   break;
-               }
-           }
-       }
-       ppp =
-           ms_ucs_map_f == UCS_MAP_CP932 ? utf8_to_euc_3bytes_932 :
-           ms_ucs_map_f == UCS_MAP_MS ? utf8_to_euc_3bytes_ms :
-           ms_ucs_map_f == UCS_MAP_CP10001 ? utf8_to_euc_3bytes_mac :
-           utf8_to_euc_3bytes;
-       ret = w_iconv_common(c1, c0, ppp[c2 - 0xE0], sizeof_utf8_to_euc_C2, p2, p1);
-    }else return -1;
-#ifdef SHIFTJIS_CP932
-    if (!ret && !cp932inv_f && is_eucg3(*p2)) {
-       nkf_char s2, s1;
-       if (e2s_conv(*p2, *p1, &s2, &s1) == 0) {
-           s2e_conv(s2, s1, p2, p1);
-       }else{
-           ret = 1;
-       }
+    if (c1 == EOF) {
+       (*oconv)(EOF, 0);
+       return 0;
     }
-#endif
-    return ret;
-}
-
-nkf_char w_iconv_common(nkf_char c1, nkf_char c0, const unsigned short *const *pp, nkf_char psize, nkf_char *p2, nkf_char *p1)
-{
-    nkf_char c2;
-    const unsigned short *p;
-    unsigned short val;
 
-    if (pp == 0) return 1;
+    switch(input_endian){
+    case ENDIAN_BIG:
+       wc = c2 << 16 | c3 << 8 | c4;
+       break;
+    case ENDIAN_LITTLE:
+       wc = c3 << 16 | c2 << 8 | c1;
+       break;
+    case ENDIAN_2143:
+       wc = c1 << 16 | c4 << 8 | c3;
+       break;
+    case ENDIAN_3412:
+       wc = c4 << 16 | c1 << 8 | c2;
+       break;
+    default:
+       return NKF_ICONV_INVALID_CODE_RANGE;
+    }
 
-    c1 -= 0x80;
-    if (c1 < 0 || psize <= c1) return 1;
-    p = pp[c1];
-    if (p == 0)  return 1;
+    return (*unicode_iconv)(wc);
+}
+#endif
 
-    c0 -= 0x80;
-    if (c0 < 0 || sizeof_utf8_to_euc_C2 <= c0) return 1;
-    val = p[c0];
-    if (val == 0) return 1;
-    if (no_cp932ext_f && (
-       (val>>8) == 0x2D || /* NEC special characters */
-       val > NKF_INT32_C(0xF300) /* IBM extended characters */
-       )) return 1;
+#define output_ascii_escape_sequence(mode) do { \
+           if (output_mode != ASCII && output_mode != ISO_8859_1) { \
+                   (*o_putc)(ESC); \
+                   (*o_putc)('('); \
+                   (*o_putc)(ascii_intro); \
+                   output_mode = mode; \
+           } \
+    } while (0)
 
-    c2 = val >> 8;
-   if (val > 0x7FFF){
-        c2 &= 0x7f;
-        c2 |= PREFIX_EUCG3;
+static void
+output_escape_sequence(int mode)
+{
+    if (output_mode == mode)
+       return;
+    switch(mode) {
+    case ISO_8859_1:
+       (*o_putc)(ESC);
+       (*o_putc)('.');
+       (*o_putc)('A');
+       break;
+    case JIS_X_0201_1976_K:
+       (*o_putc)(ESC);
+       (*o_putc)('(');
+       (*o_putc)('I');
+       break;
+    case JIS_X_0208:
+       (*o_putc)(ESC);
+       (*o_putc)('$');
+       (*o_putc)(kanji_intro);
+       break;
+    case JIS_X_0212:
+       (*o_putc)(ESC);
+       (*o_putc)('$');
+       (*o_putc)('(');
+       (*o_putc)('D');
+       break;
+    case JIS_X_0213_1:
+       (*o_putc)(ESC);
+       (*o_putc)('$');
+       (*o_putc)('(');
+       (*o_putc)('Q');
+       break;
+    case JIS_X_0213_2:
+       (*o_putc)(ESC);
+       (*o_putc)('$');
+       (*o_putc)('(');
+       (*o_putc)('P');
+       break;
     }
-    if (c2 == SO) c2 = X0201;
-    c1 = val & 0x7f;
-    if (p2) *p2 = c2;
-    if (p1) *p1 = c1;
-    return 0;
+    output_mode = mode;
 }
 
-void nkf_each_char_to_hex(void (*f)(nkf_char c2,nkf_char c1), nkf_char c)
+static void
+j_oconv(nkf_char c2, nkf_char c1)
 {
-    int shift = 20;
-    c &= VALUE_MASK;
-    while(shift >= 0){
-       if(c >= 1<<shift){
-           while(shift >= 0){
-               (*f)(0, bin2hex(c>>shift));
-               shift -= 4;
-           }
-       }else{
-           shift -= 4;
-       }
-    }
-    return;
-}
-
-void encode_fallback_html(nkf_char c)
-{
-    (*oconv)(0, '&');
-    (*oconv)(0, '#');
-    c &= VALUE_MASK;
-    if(c >= NKF_INT32_C(1000000))
-       (*oconv)(0, 0x30+(c/NKF_INT32_C(1000000))%10);
-    if(c >= NKF_INT32_C(100000))
-       (*oconv)(0, 0x30+(c/NKF_INT32_C(100000) )%10);
-    if(c >= 10000)
-       (*oconv)(0, 0x30+(c/10000  )%10);
-    if(c >= 1000)
-       (*oconv)(0, 0x30+(c/1000   )%10);
-    if(c >= 100)
-       (*oconv)(0, 0x30+(c/100    )%10);
-    if(c >= 10)
-       (*oconv)(0, 0x30+(c/10     )%10);
-    if(c >= 0)
-       (*oconv)(0, 0x30+ c         %10);
-    (*oconv)(0, ';');
-    return;
-}
-
-void encode_fallback_xml(nkf_char c)
-{
-    (*oconv)(0, '&');
-    (*oconv)(0, '#');
-    (*oconv)(0, 'x');
-    nkf_each_char_to_hex(oconv, c);
-    (*oconv)(0, ';');
-    return;
-}
-
-void encode_fallback_java(nkf_char c)
-{
-    (*oconv)(0, '\\');
-    c &= VALUE_MASK;
-    if(!is_unicode_bmp(c)){
-       (*oconv)(0, 'U');
-       (*oconv)(0, '0');
-       (*oconv)(0, '0');
-       (*oconv)(0, bin2hex(c>>20));
-       (*oconv)(0, bin2hex(c>>16));
-    }else{
-       (*oconv)(0, 'u');
-    }
-    (*oconv)(0, bin2hex(c>>12));
-    (*oconv)(0, bin2hex(c>> 8));
-    (*oconv)(0, bin2hex(c>> 4));
-    (*oconv)(0, bin2hex(c    ));
-    return;
-}
-
-void encode_fallback_perl(nkf_char c)
-{
-    (*oconv)(0, '\\');
-    (*oconv)(0, 'x');
-    (*oconv)(0, '{');
-    nkf_each_char_to_hex(oconv, c);
-    (*oconv)(0, '}');
-    return;
-}
-
-void encode_fallback_subchar(nkf_char c)
-{
-    c = unicode_subchar;
-    (*oconv)((c>>8)&0xFF, c&0xFF);
-    return;
-}
-#endif
-
-#ifdef UTF8_OUTPUT_ENABLE
-nkf_char e2w_conv(nkf_char c2, nkf_char c1)
-{
-    const unsigned short *p;
-
-    if (c2 == X0201) {
-       if (ms_ucs_map_f == UCS_MAP_CP10001) {
-           switch (c1) {
-           case 0x20:
-               return 0xA0;
-           case 0x7D:
-               return 0xA9;
+#ifdef NUMCHAR_OPTION
+    if (c2 == 0 && nkf_char_unicode_p(c1)){
+       w16e_conv(c1, &c2, &c1);
+       if (c2 == 0 && nkf_char_unicode_p(c1)){
+           c2 = c1 & VALUE_MASK;
+           if (ms_ucs_map_f && 0xE000 <= c2 && c2 <= 0xE757) {
+               /* CP5022x UDC */
+               c1 &= 0xFFF;
+               c2 = 0x7F + c1 / 94;
+               c1 = 0x21 + c1 % 94;
+           } else {
+               if (encode_fallback) (*encode_fallback)(c1);
+               return;
            }
        }
-        p = euc_to_utf8_1byte;
-#ifdef X0212_ENABLE
-    } else if (is_eucg3(c2)){
-       if(ms_ucs_map_f == UCS_MAP_ASCII&& c2 == NKF_INT32_C(0x8F22) && c1 == 0x43){
-           return 0xA6;
-       }
-        c2 = (c2&0x7f) - 0x21;
-        if (0<=c2 && c2<sizeof_euc_to_utf8_2bytes)
-           p = x0212_to_utf8_2bytes[c2];
-        else
-            return 0;
-#endif
-    } else {
-        c2 &= 0x7f;
-        c2 = (c2&0x7f) - 0x21;
-        if (0<=c2 && c2<sizeof_euc_to_utf8_2bytes)
-            p =
-               ms_ucs_map_f == UCS_MAP_ASCII ? euc_to_utf8_2bytes[c2] :
-               ms_ucs_map_f == UCS_MAP_CP10001 ? euc_to_utf8_2bytes_mac[c2] :
-               euc_to_utf8_2bytes_ms[c2];
-       else
-           return 0;
-    }
-    if (!p) return 0;
-    c1 = (c1 & 0x7f) - 0x21;
-    if (0<=c1 && c1<sizeof_euc_to_utf8_1byte)
-       return p[c1];
-    return 0;
-}
-
-void w_oconv(nkf_char c2, nkf_char c1)
-{
-    nkf_char c0;
-    nkf_char val;
-
-    if (output_bom_f) {
-       output_bom_f = FALSE;
-       (*o_putc)('\357');
-       (*o_putc)('\273');
-       (*o_putc)('\277');
-    }
-
-    if (c2 == EOF) {
-        (*o_putc)(EOF);
-        return;
-    }
-
-#ifdef NUMCHAR_OPTION
-    if (c2 == 0 && is_unicode_capsule(c1)){
-        val = c1 & VALUE_MASK;
-        if (val < 0x80){
-            (*o_putc)(val);
-        }else if (val < 0x800){
-            (*o_putc)(0xC0 | (val >> 6));
-            (*o_putc)(0x80 | (val & 0x3f));
-        } else if (val <= NKF_INT32_C(0xFFFF)) {
-            (*o_putc)(0xE0 | (val >> 12));
-            (*o_putc)(0x80 | ((val >> 6) & 0x3f));
-            (*o_putc)(0x80 | (val        & 0x3f));
-        } else if (val <= NKF_INT32_C(0x10FFFF)) {
-            (*o_putc)(0xF0 | ( val>>18));
-            (*o_putc)(0x80 | ((val>>12) & 0x3f));
-            (*o_putc)(0x80 | ((val>> 6) & 0x3f));
-            (*o_putc)(0x80 | ( val      & 0x3f));
-        }
-        return;
     }
 #endif
-
     if (c2 == 0) {
-       output_mode = ASCII;
-        (*o_putc)(c1);
-    } else if (c2 == ISO8859_1) {
-       output_mode = ISO8859_1;
-        (*o_putc)(c1 | 0x080);
-    } else {
-        output_mode = UTF8;
-       val = e2w_conv(c2, c1);
-        if (val){
-            w16w_conv(val, &c2, &c1, &c0);
-            (*o_putc)(c2);
-            if (c1){
-                (*o_putc)(c1);
-                if (c0) (*o_putc)(c0);
-            }
-        }
-    }
-}
-
-void w_oconv16(nkf_char c2, nkf_char c1)
-{
-    if (output_bom_f) {
-       output_bom_f = FALSE;
-        if (output_endian == ENDIAN_LITTLE){
-            (*o_putc)((unsigned char)'\377');
-            (*o_putc)('\376');
-        }else{
-            (*o_putc)('\376');
-            (*o_putc)((unsigned char)'\377');
-        }
-    }
-
-    if (c2 == EOF) {
-        (*o_putc)(EOF);
-        return;
-    }
-
-    if (c2 == ISO8859_1) {
-        c2 = 0;
-        c1 |= 0x80;
-#ifdef NUMCHAR_OPTION
-    } else if (c2 == 0 && is_unicode_capsule(c1)) {
-        if (is_unicode_bmp(c1)) {
-            c2 = (c1 >> 8) & 0xff;
-            c1 &= 0xff;
-        } else {
-            c1 &= VALUE_MASK;
-            if (c1 <= UNICODE_MAX) {
-                c2 = (c1 >> 10) + NKF_INT32_C(0xD7C0);   /* high surrogate */
-                c1 = (c1 & 0x3FF) + NKF_INT32_C(0xDC00); /* low surrogate */
-                if (output_endian == ENDIAN_LITTLE){
-                    (*o_putc)(c2 & 0xff);
-                    (*o_putc)((c2 >> 8) & 0xff);
-                    (*o_putc)(c1 & 0xff);
-                    (*o_putc)((c1 >> 8) & 0xff);
-                }else{
-                    (*o_putc)((c2 >> 8) & 0xff);
-                    (*o_putc)(c2 & 0xff);
-                    (*o_putc)((c1 >> 8) & 0xff);
-                    (*o_putc)(c1 & 0xff);
-                }
-            }
-            return;
-        }
-#endif
-    } else if (c2) {
-        nkf_char val = e2w_conv(c2, c1);
-        c2 = (val >> 8) & 0xff;
-        c1 = val & 0xff;
-       if (!val) return;
-    }
-    if (output_endian == ENDIAN_LITTLE){
-        (*o_putc)(c1);
-        (*o_putc)(c2);
-    }else{
-        (*o_putc)(c2);
-        (*o_putc)(c1);
+       output_ascii_escape_sequence(ASCII);
+       (*o_putc)(c1);
     }
-}
-
-void w_oconv32(nkf_char c2, nkf_char c1)
-{
-    if (output_bom_f) {
-       output_bom_f = FALSE;
-        if (output_endian == ENDIAN_LITTLE){
-            (*o_putc)((unsigned char)'\377');
-            (*o_putc)('\376');
-           (*o_putc)('\000');
-           (*o_putc)('\000');
-        }else{
-           (*o_putc)('\000');
-           (*o_putc)('\000');
-            (*o_putc)('\376');
-            (*o_putc)((unsigned char)'\377');
-        }
+    else if (c2 == EOF) {
+       output_ascii_escape_sequence(ASCII);
+       (*o_putc)(EOF);
     }
-
-    if (c2 == EOF) {
-        (*o_putc)(EOF);
-        return;
+    else if (c2 == ISO_8859_1) {
+       output_ascii_escape_sequence(ISO_8859_1);
+       (*o_putc)(c1|0x80);
     }
-
-    if (c2 == ISO8859_1) {
-        c1 |= 0x80;
-#ifdef NUMCHAR_OPTION
-    } else if (c2 == 0 && is_unicode_capsule(c1)) {
-       c1 &= VALUE_MASK;
+    else if (c2 == JIS_X_0201_1976_K) {
+       output_escape_sequence(JIS_X_0201_1976_K);
+       (*o_putc)(c1);
+#ifdef X0212_ENABLE
+    } else if (is_eucg3(c2)){
+       output_escape_sequence(x0213_f ? JIS_X_0213_2 : JIS_X_0212);
+       (*o_putc)(c2 & 0x7f);
+       (*o_putc)(c1);
 #endif
-    } else if (c2) {
-        c1 = e2w_conv(c2, c1);
-       if (!c1) return;
-    }
-    if (output_endian == ENDIAN_LITTLE){
-        (*o_putc)( c1 & NKF_INT32_C(0x000000FF));
-        (*o_putc)((c1 & NKF_INT32_C(0x0000FF00)) >>  8);
-        (*o_putc)((c1 & NKF_INT32_C(0x00FF0000)) >> 16);
-       (*o_putc)('\000');
-    }else{
-       (*o_putc)('\000');
-        (*o_putc)((c1 & NKF_INT32_C(0x00FF0000)) >> 16);
-        (*o_putc)((c1 & NKF_INT32_C(0x0000FF00)) >>  8);
-        (*o_putc)( c1 & NKF_INT32_C(0x000000FF));
+    } else {
+       if(ms_ucs_map_f
+          ? c2<0x20 || 0x92<c2 || c1<0x20 || 0x7e<c1
+          : c2<0x20 || 0x7e<c2 || c1<0x20 || 0x7e<c1) return;
+       output_escape_sequence(x0213_f ? JIS_X_0213_1 : JIS_X_0208);
+       (*o_putc)(c2);
+       (*o_putc)(c1);
     }
 }
-#endif
 
-void e_oconv(nkf_char c2, nkf_char c1)
+static void
+e_oconv(nkf_char c2, nkf_char c1)
 {
-#ifdef NUMCHAR_OPTION
-    if (c2 == 0 && is_unicode_capsule(c1)){
-        w16e_conv(c1, &c2, &c1);
-        if (c2 == 0 && is_unicode_capsule(c1)){
+    if (c2 == 0 && nkf_char_unicode_p(c1)){
+       w16e_conv(c1, &c2, &c1);
+       if (c2 == 0 && nkf_char_unicode_p(c1)){
            c2 = c1 & VALUE_MASK;
            if (x0212_f && 0xE000 <= c2 && c2 <= 0xE757) {
                /* eucJP-ms UDC */
@@ -4015,140 +2399,68 @@ void e_oconv(nkf_char c2, nkf_char c1)
                if (encode_fallback) (*encode_fallback)(c1);
                return;
            }
-        }
+       }
     }
-#endif
+
     if (c2 == EOF) {
-        (*o_putc)(EOF);
-        return;
+       (*o_putc)(EOF);
     } else if (c2 == 0) {
        output_mode = ASCII;
-        (*o_putc)(c1);
-    } else if (c2 == X0201) {
-       output_mode = JAPANESE_EUC;
-        (*o_putc)(SSO); (*o_putc)(c1|0x80);
-    } else if (c2 == ISO8859_1) {
-       output_mode = ISO8859_1;
-        (*o_putc)(c1 | 0x080);
+       (*o_putc)(c1);
+    } else if (c2 == JIS_X_0201_1976_K) {
+       output_mode = EUC_JP;
+       (*o_putc)(SS2); (*o_putc)(c1|0x80);
+    } else if (c2 == ISO_8859_1) {
+       output_mode = ISO_8859_1;
+       (*o_putc)(c1 | 0x080);
 #ifdef X0212_ENABLE
     } else if (is_eucg3(c2)){
-       output_mode = JAPANESE_EUC;
+       output_mode = EUC_JP;
 #ifdef SHIFTJIS_CP932
-        if (!cp932inv_f){
-            nkf_char s2, s1;
-            if (e2s_conv(c2, c1, &s2, &s1) == 0){
-                s2e_conv(s2, s1, &c2, &c1);
-            }
-        }
-#endif
-        if (c2 == 0) {
+       if (!cp932inv_f){
+           nkf_char s2, s1;
+           if (e2s_conv(c2, c1, &s2, &s1) == 0){
+               s2e_conv(s2, s1, &c2, &c1);
+           }
+       }
+#endif
+       if (c2 == 0) {
            output_mode = ASCII;
            (*o_putc)(c1);
        }else if (is_eucg3(c2)){
-            if (x0212_f){
-                (*o_putc)(0x8f);
-                (*o_putc)((c2 & 0x7f) | 0x080);
-                (*o_putc)(c1 | 0x080);
-            }
-        }else{
-            (*o_putc)((c2 & 0x7f) | 0x080);
-            (*o_putc)(c1 | 0x080);
-        }
-#endif
-    } else {
-        if (!nkf_isgraph(c1) || !nkf_isgraph(c2)) {
-            set_iconv(FALSE, 0);
-            return; /* too late to rescue this char */
-        }
-       output_mode = JAPANESE_EUC;
-        (*o_putc)(c2 | 0x080);
-        (*o_putc)(c1 | 0x080);
-    }
-}
-
-#ifdef X0212_ENABLE
-nkf_char x0212_shift(nkf_char c)
-{
-    nkf_char ret = c;
-    c &= 0x7f;
-    if (is_eucg3(ret)){
-        if (0x75 <= c && c <= 0x7f){
-            ret = c + (0x109 - 0x75);
-        }
-    }else{
-        if (0x75 <= c && c <= 0x7f){
-            ret = c + (0x113 - 0x75);
-        }
-    }
-    return ret;
-}
-
-
-nkf_char x0212_unshift(nkf_char c)
-{
-    nkf_char ret = c;
-    if (0x7f <= c && c <= 0x88){
-        ret = c + (0x75 - 0x7f);
-    }else if (0x89 <= c && c <= 0x92){
-        ret = PREFIX_EUCG3 | 0x80 | (c + (0x75 - 0x89));
-    }
-    return ret;
-}
-#endif /* X0212_ENABLE */
-
-nkf_char e2s_conv(nkf_char c2, nkf_char c1, nkf_char *p2, nkf_char *p1)
-{
-    nkf_char ndx;
-    if (is_eucg3(c2)){
-       ndx = c2 & 0x7f;
-       if (x0213_f){
-           if((0x21 <= ndx && ndx <= 0x2F)){
-               if (p2) *p2 = ((ndx - 1) >> 1) + 0xec - ndx / 8 * 3;
-               if (p1) *p1 = c1 + ((ndx & 1) ? ((c1 < 0x60) ? 0x1f : 0x20) : 0x7e);
-               return 0;
-           }else if(0x6E <= ndx && ndx <= 0x7E){
-               if (p2) *p2 = ((ndx - 1) >> 1) + 0xbe;
-               if (p1) *p1 = c1 + ((ndx & 1) ? ((c1 < 0x60) ? 0x1f : 0x20) : 0x7e);
-               return 0;
+           if (x0212_f){
+               (*o_putc)(0x8f);
+               (*o_putc)((c2 & 0x7f) | 0x080);
+               (*o_putc)(c1 | 0x080);
            }
-           return 1;
+       }else{
+           (*o_putc)((c2 & 0x7f) | 0x080);
+           (*o_putc)(c1 | 0x080);
        }
-#ifdef X0212_ENABLE
-       else if(nkf_isgraph(ndx)){
-           nkf_char val = 0;
-           const unsigned short *ptr;
-           ptr = x0212_shiftjis[ndx - 0x21];
-           if (ptr){
-               val = ptr[(c1 & 0x7f) - 0x21];
-           }
-           if (val){
-               c2 = val >> 8;
-               c1 = val & 0xff;
-               if (p2) *p2 = c2;
-               if (p1) *p1 = c1;
-               return 0;
-           }
-           c2 = x0212_shift(c2);
+#endif
+    } else {
+       if (!nkf_isgraph(c1) || !nkf_isgraph(c2)) {
+           set_iconv(FALSE, 0);
+           return; /* too late to rescue this char */
        }
-#endif /* X0212_ENABLE */
+       output_mode = EUC_JP;
+       (*o_putc)(c2 | 0x080);
+       (*o_putc)(c1 | 0x080);
     }
-    if(0x7F < c2) return 1;
-    if (p2) *p2 = ((c2 - 1) >> 1) + ((c2 <= 0x5e) ? 0x71 : 0xb1);
-    if (p1) *p1 = c1 + ((c2 & 1) ? ((c1 < 0x60) ? 0x1f : 0x20) : 0x7e);
-    return 0;
 }
 
-void s_oconv(nkf_char c2, nkf_char c1)
+static void
+s_oconv(nkf_char c2, nkf_char c1)
 {
 #ifdef NUMCHAR_OPTION
-    if (c2 == 0 && is_unicode_capsule(c1)){
-        w16e_conv(c1, &c2, &c1);
-        if (c2 == 0 && is_unicode_capsule(c1)){
+    if (c2 == 0 && nkf_char_unicode_p(c1)){
+       w16e_conv(c1, &c2, &c1);
+       if (c2 == 0 && nkf_char_unicode_p(c1)){
            c2 = c1 & VALUE_MASK;
            if (!x0213_f && 0xE000 <= c2 && c2 <= 0xE757) {
                /* CP932 UDC */
                c1 &= 0xFFF;
-               c2 = c1 / 188 + 0xF0;
+               c2 = c1 / 188 + (cp932inv_f ? 0xF0 : 0xEB);
                c1 = c1 % 188;
                c1 += 0x40 + (c1 > 0x3e);
                (*o_putc)(c2);
@@ -4162,2039 +2474,4181 @@ void s_oconv(nkf_char c2, nkf_char c1)
     }
 #endif
     if (c2 == EOF) {
-        (*o_putc)(EOF);
-        return;
+       (*o_putc)(EOF);
+       return;
     } else if (c2 == 0) {
        output_mode = ASCII;
-        (*o_putc)(c1);
-    } else if (c2 == X0201) {
+       (*o_putc)(c1);
+    } else if (c2 == JIS_X_0201_1976_K) {
        output_mode = SHIFT_JIS;
-        (*o_putc)(c1|0x80);
-    } else if (c2 == ISO8859_1) {
-       output_mode = ISO8859_1;
-        (*o_putc)(c1 | 0x080);
+       (*o_putc)(c1|0x80);
+    } else if (c2 == ISO_8859_1) {
+       output_mode = ISO_8859_1;
+       (*o_putc)(c1 | 0x080);
 #ifdef X0212_ENABLE
     } else if (is_eucg3(c2)){
        output_mode = SHIFT_JIS;
-        if (e2s_conv(c2, c1, &c2, &c1) == 0){
-            (*o_putc)(c2);
-            (*o_putc)(c1);
-        }
+       if (e2s_conv(c2, c1, &c2, &c1) == 0){
+           (*o_putc)(c2);
+           (*o_putc)(c1);
+       }
 #endif
     } else {
-        if (!nkf_isprint(c1) || !nkf_isprint(c2)) {
-            set_iconv(FALSE, 0);
-            return; /* too late to rescue this char */
-        }
+       if (!nkf_isprint(c1) || !nkf_isprint(c2)) {
+           set_iconv(FALSE, 0);
+           return; /* too late to rescue this char */
+       }
        output_mode = SHIFT_JIS;
-        e2s_conv(c2, c1, &c2, &c1);
+       e2s_conv(c2, c1, &c2, &c1);
 
 #ifdef SHIFTJIS_CP932
-        if (cp932inv_f
-            && CP932INV_TABLE_BEGIN <= c2 && c2 <= CP932INV_TABLE_END){
-            nkf_char c = cp932inv[c2 - CP932INV_TABLE_BEGIN][c1 - 0x40];
-            if (c){
-                c2 = c >> 8;
-                c1 = c & 0xff;
-            }
-        }
+       if (cp932inv_f
+           && CP932INV_TABLE_BEGIN <= c2 && c2 <= CP932INV_TABLE_END){
+           nkf_char c = cp932inv[c2 - CP932INV_TABLE_BEGIN][c1 - 0x40];
+           if (c){
+               c2 = c >> 8;
+               c1 = c & 0xff;
+           }
+       }
 #endif /* SHIFTJIS_CP932 */
 
-        (*o_putc)(c2);
+       (*o_putc)(c2);
        if (prefix_table[(unsigned char)c1]){
-            (*o_putc)(prefix_table[(unsigned char)c1]);
+           (*o_putc)(prefix_table[(unsigned char)c1]);
        }
-        (*o_putc)(c1);
+       (*o_putc)(c1);
     }
 }
 
-void j_oconv(nkf_char c2, nkf_char c1)
+#ifdef UTF8_OUTPUT_ENABLE
+static void
+w_oconv(nkf_char c2, nkf_char c1)
 {
-#ifdef NUMCHAR_OPTION
-    if (c2 == 0 && is_unicode_capsule(c1)){
-        w16e_conv(c1, &c2, &c1);
-        if (c2 == 0 && is_unicode_capsule(c1)){
-           c2 = c1 & VALUE_MASK;
-           if (ms_ucs_map_f && 0xE000 <= c2 && c2 <= 0xE757) {
-               /* CP5022x UDC */
-               c1 &= 0xFFF;
-               c2 = 0x7F + c1 / 94;
-               c1 = 0x21 + c1 % 94;
-           } else {
-               if (encode_fallback) (*encode_fallback)(c1);
-               return;
-           }
-        }
-    }
-#endif
+    nkf_char c3, c4;
+    nkf_char val;
+
+    if (output_bom_f) {
+       output_bom_f = FALSE;
+       (*o_putc)('\357');
+       (*o_putc)('\273');
+       (*o_putc)('\277');
+    }
+
     if (c2 == EOF) {
-        if (output_mode !=ASCII && output_mode!=ISO8859_1) {
-            (*o_putc)(ESC);
-            (*o_putc)('(');
-            (*o_putc)(ascii_intro);
-           output_mode = ASCII;
-        }
-        (*o_putc)(EOF);
-#ifdef X0212_ENABLE
-    } else if (is_eucg3(c2)){
-       if(x0213_f){
-           if(output_mode!=X0213_2){
-               output_mode = X0213_2;
-               (*o_putc)(ESC);
-               (*o_putc)('$');
-               (*o_putc)('(');
-               (*o_putc)(X0213_2&0x7F);
-           }
-       }else{
-           if(output_mode!=X0212){
-               output_mode = X0212;
-               (*o_putc)(ESC);
-               (*o_putc)('$');
-               (*o_putc)('(');
-               (*o_putc)(X0212&0x7F);
-           }
-        }
-        (*o_putc)(c2 & 0x7f);
-        (*o_putc)(c1);
-#endif
-    } else if (c2==X0201) {
-        if (output_mode!=X0201) {
-            output_mode = X0201;
-            (*o_putc)(ESC);
-            (*o_putc)('(');
-            (*o_putc)('I');
-        }
-        (*o_putc)(c1);
-    } else if (c2==ISO8859_1) {
-            /* iso8859 introduction, or 8th bit on */
-            /* Can we convert in 7bit form using ESC-'-'-A ?
-               Is this popular? */
-       output_mode = ISO8859_1;
-        (*o_putc)(c1|0x80);
-    } else if (c2 == 0) {
-        if (output_mode !=ASCII && output_mode!=ISO8859_1) {
-            (*o_putc)(ESC);
-            (*o_putc)('(');
-            (*o_putc)(ascii_intro);
-            output_mode = ASCII;
-        }
-        (*o_putc)(c1);
-    } else {
-       if(ms_ucs_map_f
-          ? c2<0x20 || 0x92<c2 || c1<0x20 || 0x7e<c1
-          : c2<0x20 || 0x7e<c2 || c1<0x20 || 0x7e<c1) return;
-       if(x0213_f){
-           if (output_mode!=X0213_1) {
-               output_mode = X0213_1;
-               (*o_putc)(ESC);
-               (*o_putc)('$');
-               (*o_putc)('(');
-               (*o_putc)(X0213_1&0x7F);
-           }
-       }else if (output_mode != X0208) {
-            output_mode = X0208;
-            (*o_putc)(ESC);
-            (*o_putc)('$');
-            (*o_putc)(kanji_intro);
-        }
-        (*o_putc)(c2);
-        (*o_putc)(c1);
+       (*o_putc)(EOF);
+       return;
     }
-}
 
-void base64_conv(nkf_char c2, nkf_char c1)
-{
-    mime_prechar(c2, c1);
-    (*o_base64conv)(c2,c1);
-}
+    if (c2 == 0 && nkf_char_unicode_p(c1)){
+       val = c1 & VALUE_MASK;
+       nkf_unicode_to_utf8(val, &c1, &c2, &c3, &c4);
+       (*o_putc)(c1);
+       if (c2) (*o_putc)(c2);
+       if (c3) (*o_putc)(c3);
+       if (c4) (*o_putc)(c4);
+       return;
+    }
 
+    if (c2 == 0) {
+       (*o_putc)(c1);
+    } else {
+       val = e2w_conv(c2, c1);
+       if (val){
+           nkf_unicode_to_utf8(val, &c1, &c2, &c3, &c4);
+           (*o_putc)(c1);
+           if (c2) (*o_putc)(c2);
+           if (c3) (*o_putc)(c3);
+           if (c4) (*o_putc)(c4);
+       }
+    }
+}
 
-static nkf_char broken_buf[3];
-static int broken_counter = 0;
-static int broken_last = 0;
-nkf_char broken_getc(FILE *f)
+static void
+w_oconv16(nkf_char c2, nkf_char c1)
 {
-    nkf_char c,c1;
+    if (output_bom_f) {
+       output_bom_f = FALSE;
+       if (output_endian == ENDIAN_LITTLE){
+           (*o_putc)(0xFF);
+           (*o_putc)(0xFE);
+       }else{
+           (*o_putc)(0xFE);
+           (*o_putc)(0xFF);
+       }
+    }
 
-    if (broken_counter>0) {
-       return broken_buf[--broken_counter];
+    if (c2 == EOF) {
+       (*o_putc)(EOF);
+       return;
     }
-    c= (*i_bgetc)(f);
-    if (c=='$' && broken_last != ESC
-            && (input_mode==ASCII || input_mode==X0201)) {
-       c1= (*i_bgetc)(f);
-       broken_last = 0;
-       if (c1=='@'|| c1=='B') {
-           broken_buf[0]=c1; broken_buf[1]=c;
-           broken_counter=2;
-           return ESC;
-       } else {
-           (*i_bungetc)(c1,f);
-           return c;
-       }
-    } else if (c=='(' && broken_last != ESC
-            && (input_mode==X0208 || input_mode==X0201)) { /* ) */
-       c1= (*i_bgetc)(f);
-       broken_last = 0;
-       if (c1=='J'|| c1=='B') {
-           broken_buf[0]=c1; broken_buf[1]=c;
-           broken_counter=2;
-           return ESC;
+
+    if (c2 == 0 && nkf_char_unicode_p(c1)) {
+       if (nkf_char_unicode_bmp_p(c1)) {
+           c2 = (c1 >> 8) & 0xff;
+           c1 &= 0xff;
        } else {
-           (*i_bungetc)(c1,f);
-           return c;
+           c1 &= VALUE_MASK;
+           if (c1 <= UNICODE_MAX) {
+               c2 = (c1 >> 10) + NKF_INT32_C(0xD7C0);   /* high surrogate */
+               c1 = (c1 & 0x3FF) + NKF_INT32_C(0xDC00); /* low surrogate */
+               if (output_endian == ENDIAN_LITTLE){
+                   (*o_putc)(c2 & 0xff);
+                   (*o_putc)((c2 >> 8) & 0xff);
+                   (*o_putc)(c1 & 0xff);
+                   (*o_putc)((c1 >> 8) & 0xff);
+               }else{
+                   (*o_putc)((c2 >> 8) & 0xff);
+                   (*o_putc)(c2 & 0xff);
+                   (*o_putc)((c1 >> 8) & 0xff);
+                   (*o_putc)(c1 & 0xff);
+               }
+           }
+           return;
        }
-    } else {
-       broken_last = c;
-       return c;
+    } else if (c2) {
+       nkf_char val = e2w_conv(c2, c1);
+       c2 = (val >> 8) & 0xff;
+       c1 = val & 0xff;
+       if (!val) return;
     }
-}
 
-nkf_char broken_ungetc(nkf_char c, FILE *f)
-{
-    if (broken_counter<2)
-       broken_buf[broken_counter++]=c;
-    return c;
+    if (output_endian == ENDIAN_LITTLE){
+       (*o_putc)(c1);
+       (*o_putc)(c2);
+    }else{
+       (*o_putc)(c2);
+       (*o_putc)(c1);
+    }
 }
 
-void nl_conv(nkf_char c2, nkf_char c1)
+static void
+w_oconv32(nkf_char c2, nkf_char c1)
 {
-    if (guess_f && input_nextline != EOF) {
-       if (c2 == 0 && c1 == LF) {
-           if (!input_nextline) input_nextline = prev_cr ? CRLF : LF;
-           else if (input_nextline != (prev_cr ? CRLF : LF)) input_nextline = EOF;
-       } else if (c2 == 0 && c1 == CR && input_nextline == LF) input_nextline = EOF;
-       else if (!prev_cr);
-       else if (!input_nextline) input_nextline = CR;
-       else if (input_nextline != CR) input_nextline = EOF;
-    }
-    if (prev_cr || c2 == 0 && c1 == LF) {
-       prev_cr = 0;
-       if (nlmode_f != LF) (*o_nlconv)(0, CR);
-       if (nlmode_f != CR) (*o_nlconv)(0, LF);
+    if (output_bom_f) {
+       output_bom_f = FALSE;
+       if (output_endian == ENDIAN_LITTLE){
+           (*o_putc)(0xFF);
+           (*o_putc)(0xFE);
+           (*o_putc)(0);
+           (*o_putc)(0);
+       }else{
+           (*o_putc)(0);
+           (*o_putc)(0);
+           (*o_putc)(0xFE);
+           (*o_putc)(0xFF);
+       }
     }
-    if (c2 == 0 && c1 == CR) prev_cr = CR;
-    else if (c2 != 0 || c1 != LF) (*o_nlconv)(c2, c1);
-}
 
-/*
-  Return value of fold_conv()
+    if (c2 == EOF) {
+       (*o_putc)(EOF);
+       return;
+    }
 
-       LF  add newline  and output char
-       CR  add newline  and output nothing
-       SP  space
-       0   skip
-       1   (or else) normal output
+    if (c2 == ISO_8859_1) {
+       c1 |= 0x80;
+    } else if (c2 == 0 && nkf_char_unicode_p(c1)) {
+       c1 &= VALUE_MASK;
+    } else if (c2) {
+       c1 = e2w_conv(c2, c1);
+       if (!c1) return;
+    }
+    if (output_endian == ENDIAN_LITTLE){
+       (*o_putc)( c1        & 0xFF);
+       (*o_putc)((c1 >>  8) & 0xFF);
+       (*o_putc)((c1 >> 16) & 0xFF);
+       (*o_putc)(0);
+    }else{
+       (*o_putc)(0);
+       (*o_putc)((c1 >> 16) & 0xFF);
+       (*o_putc)((c1 >>  8) & 0xFF);
+       (*o_putc)( c1        & 0xFF);
+    }
+}
+#endif
 
-  fold state in prev (previous character)
+#define SCORE_L2       (1)                   /* Kanji Level 2 */
+#define SCORE_KANA     (SCORE_L2 << 1)       /* Halfwidth Katakana */
+#define SCORE_DEPEND   (SCORE_KANA << 1)     /* MD Characters */
+#define SCORE_CP932    (SCORE_DEPEND << 1)   /* IBM extended characters */
+#define SCORE_X0212    (SCORE_CP932 << 1)    /* JIS X 0212 */
+#define SCORE_NO_EXIST (SCORE_X0212 << 1)    /* Undefined Characters */
+#define SCORE_iMIME    (SCORE_NO_EXIST << 1) /* MIME selected */
+#define SCORE_ERROR    (SCORE_iMIME << 1) /* Error */
 
-      >0x80 Japanese (X0208/X0201)
-      <0x80 ASCII
-      LF    new line
-      SP    space
+#define SCORE_INIT (SCORE_iMIME)
 
-  This fold algorthm does not preserve heading space in a line.
-  This is the main difference from fmt.
-*/
+static const nkf_char score_table_A0[] = {
+    0, 0, 0, 0,
+    0, 0, 0, 0,
+    0, SCORE_DEPEND, SCORE_DEPEND, SCORE_DEPEND,
+    SCORE_DEPEND, SCORE_DEPEND, SCORE_DEPEND, SCORE_NO_EXIST,
+};
 
-#define char_size(c2,c1) (c2?2:1)
+static const nkf_char score_table_F0[] = {
+    SCORE_L2, SCORE_L2, SCORE_L2, SCORE_L2,
+    SCORE_L2, SCORE_DEPEND, SCORE_NO_EXIST, SCORE_NO_EXIST,
+    SCORE_DEPEND, SCORE_DEPEND, SCORE_CP932, SCORE_CP932,
+    SCORE_CP932, SCORE_NO_EXIST, SCORE_NO_EXIST, SCORE_ERROR,
+};
 
-void fold_conv(nkf_char c2, nkf_char c1)
+static void
+set_code_score(struct input_code *ptr, nkf_char score)
 {
-    nkf_char prev0;
-    nkf_char fold_state;
+    if (ptr){
+       ptr->score |= score;
+    }
+}
 
-    if (c1== CR && !fold_preserve_f) {
-       fold_state=0;  /* ignore cr */
-    }else if (c1== LF&&f_prev==CR && fold_preserve_f) {
-        f_prev = LF;
-       fold_state=0;  /* ignore cr */
-    } else if (c1== BS) {
-        if (f_line>0) f_line--;
-        fold_state =  1;
-    } else if (c2==EOF && f_line != 0) {    /* close open last line */
-            fold_state = LF;
-    } else if ((c1==LF && !fold_preserve_f)
-               || ((c1==CR||(c1==LF&&f_prev!=CR))
-                   && fold_preserve_f)) {
-        /* new line */
-        if (fold_preserve_f) {
-            f_prev = c1;
-            f_line = 0;
-            fold_state =  CR;
-       } else if ((f_prev == c1 && !fold_preserve_f)
-                   || (f_prev == LF && fold_preserve_f)
-                   ) {        /* duplicate newline */
-            if (f_line) {
-                f_line = 0;
-                fold_state =  LF;    /* output two newline */
-            } else {
-                f_line = 0;
-                fold_state =  1;
-            }
-        } else  {
-            if (f_prev&0x80) {     /* Japanese? */
-                f_prev = c1;
-                fold_state =  0;       /* ignore given single newline */
-            } else if (f_prev==SP) {
-                fold_state =  0;
-            } else {
-                f_prev = c1;
-                if (++f_line<=fold_len)
-                    fold_state =  SP;
-                else {
-                    f_line = 0;
-                    fold_state =  CR;        /* fold and output nothing */
-                }
-            }
-        }
-    } else if (c1=='\f') {
-        f_prev = LF;
-        f_line = 0;
-        fold_state =  LF;            /* output newline and clear */
-    } else if ( (c2==0  && c1==SP)||
-               (c2==0  && c1==TAB)||
-               (c2=='!'&& c1=='!')) {
-        /* X0208 kankaku or ascii space */
-            if (f_prev == SP) {
-                fold_state = 0;         /* remove duplicate spaces */
-            } else {
-                f_prev = SP;
-                if (++f_line<=fold_len)
-                    fold_state = SP;         /* output ASCII space only */
-                else {
-                    f_prev = SP; f_line = 0;
-                    fold_state = CR;        /* fold and output nothing */
-                }
-            }
-    } else {
-        prev0 = f_prev; /* we still need this one... , but almost done */
-        f_prev = c1;
-        if (c2 || c2==X0201)
-            f_prev |= 0x80;  /* this is Japanese */
-        f_line += char_size(c2,c1);
-        if (f_line<=fold_len) {   /* normal case */
-            fold_state = 1;
-        } else {
-            if (f_line>fold_len+fold_margin) { /* too many kinsoku suspension */
-                f_line = char_size(c2,c1);
-                fold_state =  LF;       /* We can't wait, do fold now */
-            } else if (c2==X0201) {
-            /* simple kinsoku rules  return 1 means no folding  */
-                if (c1==(0xde&0x7f)) fold_state = 1; /* \e$B!+\e(B*/
-                else if (c1==(0xdf&0x7f)) fold_state = 1; /* \e$B!,\e(B*/
-                else if (c1==(0xa4&0x7f)) fold_state = 1; /* \e$B!#\e(B*/
-                else if (c1==(0xa3&0x7f)) fold_state = 1; /* \e$B!$\e(B*/
-                else if (c1==(0xa1&0x7f)) fold_state = 1; /* \e$B!W\e(B*/
-                else if (c1==(0xb0&0x7f)) fold_state = 1; /* - */
-                else if (SP<=c1 && c1<=(0xdf&0x7f)) {      /* X0201 */
-                   f_line = 1;
-                   fold_state = LF;/* add one new f_line before this character */
-               } else {
-                   f_line = 1;
-                   fold_state = LF;/* add one new f_line before this character */
-               }
-            } else if (c2==0) {
-                /* kinsoku point in ASCII */
-               if (  c1==')'||    /* { [ ( */
-                     c1==']'||
-                     c1=='}'||
-                     c1=='.'||
-                     c1==','||
-                     c1=='!'||
-                     c1=='?'||
-                     c1=='/'||
-                     c1==':'||
-                     c1==';') {
-                   fold_state = 1;
-               /* just after special */
-               } else if (!is_alnum(prev0)) {
-                   f_line = char_size(c2,c1);
-                   fold_state = LF;
-               } else if ((prev0==SP) ||   /* ignored new f_line */
-                      (prev0==LF)||        /* ignored new f_line */
-                      (prev0&0x80)) {        /* X0208 - ASCII */
-                   f_line = char_size(c2,c1);
-                    fold_state = LF;/* add one new f_line before this character */
-                } else {
-                    fold_state = 1;  /* default no fold in ASCII */
-                }
-            } else {
-                if (c2=='!') {
-                    if (c1=='"')  fold_state = 1; /* \e$B!"\e(B */
-                    else if (c1=='#')  fold_state = 1; /* \e$B!#\e(B */
-                    else if (c1=='W')  fold_state = 1; /* \e$B!W\e(B */
-                    else if (c1=='K')  fold_state = 1; /* \e$B!K\e(B */
-                    else if (c1=='$')  fold_state = 1; /* \e$B!$\e(B */
-                    else if (c1=='%')  fold_state = 1; /* \e$B!%\e(B */
-                    else if (c1=='\'') fold_state = 1; /* \e$B!\\e(B */
-                    else if (c1=='(')  fold_state = 1; /* \e$B!(\e(B */
-                    else if (c1==')')  fold_state = 1; /* \e$B!)\e(B */
-                    else if (c1=='*')  fold_state = 1; /* \e$B!*\e(B */
-                    else if (c1=='+')  fold_state = 1; /* \e$B!+\e(B */
-                    else if (c1==',')  fold_state = 1; /* \e$B!,\e(B */
-                         /* default no fold in kinsoku */
-                   else {
-                       fold_state = LF;
-                       f_line = char_size(c2,c1);
-                       /* add one new f_line before this character */
-                   }
-                } else {
-                   f_line = char_size(c2,c1);
-                    fold_state = LF;
-                    /* add one new f_line before this character */
-                }
-            }
-        }
+static void
+clr_code_score(struct input_code *ptr, nkf_char score)
+{
+    if (ptr){
+       ptr->score &= ~score;
     }
-    /* terminator process */
-    switch(fold_state) {
-        case LF:
-            (*o_fconv)(0,LF);
-            (*o_fconv)(c2,c1);
-            break;
-        case 0:
-            return;
-        case CR:
-            (*o_fconv)(0,LF);
-            break;
-        case TAB:
-        case SP:
-            (*o_fconv)(0,SP);
-            break;
-        default:
-            (*o_fconv)(c2,c1);
+}
+
+static void
+code_score(struct input_code *ptr)
+{
+    nkf_char c2 = ptr->buf[0];
+#ifdef UTF8_OUTPUT_ENABLE
+    nkf_char c1 = ptr->buf[1];
+#endif
+    if (c2 < 0){
+       set_code_score(ptr, SCORE_ERROR);
+    }else if (c2 == SS2){
+       set_code_score(ptr, SCORE_KANA);
+    }else if (c2 == 0x8f){
+       set_code_score(ptr, SCORE_X0212);
+#ifdef UTF8_OUTPUT_ENABLE
+    }else if (!e2w_conv(c2, c1)){
+       set_code_score(ptr, SCORE_NO_EXIST);
+#endif
+    }else if ((c2 & 0x70) == 0x20){
+       set_code_score(ptr, score_table_A0[c2 & 0x0f]);
+    }else if ((c2 & 0x70) == 0x70){
+       set_code_score(ptr, score_table_F0[c2 & 0x0f]);
+    }else if ((c2 & 0x70) >= 0x50){
+       set_code_score(ptr, SCORE_L2);
     }
 }
 
-nkf_char z_prev2=0,z_prev1=0;
+static void
+status_disable(struct input_code *ptr)
+{
+    ptr->stat = -1;
+    ptr->buf[0] = -1;
+    code_score(ptr);
+    if (iconv == ptr->iconv_func) set_iconv(FALSE, 0);
+}
+
+static void
+status_push_ch(struct input_code *ptr, nkf_char c)
+{
+    ptr->buf[ptr->index++] = c;
+}
 
-void z_conv(nkf_char c2, nkf_char c1)
+static void
+status_clear(struct input_code *ptr)
 {
+    ptr->stat = 0;
+    ptr->index = 0;
+}
 
-    /* if (c2) c1 &= 0x7f; assertion */
+static void
+status_reset(struct input_code *ptr)
+{
+    status_clear(ptr);
+    ptr->score = SCORE_INIT;
+}
 
-    if (c2 == X0201 && (c1 == 0x20 || c1 == 0x7D || c1 == 0x7E)) {
-       (*o_zconv)(c2,c1);
-       return;
+static void
+status_reinit(struct input_code *ptr)
+{
+    status_reset(ptr);
+    ptr->_file_stat = 0;
+}
+
+static void
+status_check(struct input_code *ptr, nkf_char c)
+{
+    if (c <= DEL && estab_f){
+       status_reset(ptr);
     }
+}
 
-    if (x0201_f) {
-       if (z_prev2 == X0201) {
-           if (c2 == X0201) {
-               if (c1 == (0xde&0x7f)) { /* \e$BByE@\e(B */
-                   z_prev2 = 0;
-                   (*o_zconv)(dv[(z_prev1-SP)*2], dv[(z_prev1-SP)*2+1]);
-                   return;
-               } else if (c1 == (0xdf&0x7f) && ev[(z_prev1-SP)*2]) {  /* \e$BH>ByE@\e(B */
-                   z_prev2 = 0;
-                   (*o_zconv)(ev[(z_prev1-SP)*2], ev[(z_prev1-SP)*2+1]);
-                   return;
-               }
-           }
-           z_prev2 = 0;
-           (*o_zconv)(cv[(z_prev1-SP)*2], cv[(z_prev1-SP)*2+1]);
+static void
+s_status(struct input_code *ptr, nkf_char c)
+{
+    switch(ptr->stat){
+    case -1:
+       status_check(ptr, c);
+       break;
+    case 0:
+       if (c <= DEL){
+           break;
+       }else if (nkf_char_unicode_p(c)){
+           break;
+       }else if (0xa1 <= c && c <= 0xdf){
+           status_push_ch(ptr, SS2);
+           status_push_ch(ptr, c);
+           code_score(ptr);
+           status_clear(ptr);
+       }else if ((0x81 <= c && c < 0xa0) || (0xe0 <= c && c <= 0xea)){
+           ptr->stat = 1;
+           status_push_ch(ptr, c);
+       }else if (0xed <= c && c <= 0xee){
+           ptr->stat = 3;
+           status_push_ch(ptr, c);
+#ifdef SHIFTJIS_CP932
+       }else if (is_ibmext_in_sjis(c)){
+           ptr->stat = 2;
+           status_push_ch(ptr, c);
+#endif /* SHIFTJIS_CP932 */
+#ifdef X0212_ENABLE
+       }else if (0xf0 <= c && c <= 0xfc){
+           ptr->stat = 1;
+           status_push_ch(ptr, c);
+#endif /* X0212_ENABLE */
+       }else{
+           status_disable(ptr);
        }
-       if (c2 == X0201) {
-           if (dv[(c1-SP)*2] || ev[(c1-SP)*2]) {
-               /* wait for \e$BByE@\e(B or \e$BH>ByE@\e(B */
-               z_prev1 = c1;
-               z_prev2 = c2;
-               return;
-           } else {
-               (*o_zconv)(cv[(c1-SP)*2], cv[(c1-SP)*2+1]);
-               return;
+       break;
+    case 1:
+       if ((0x40 <= c && c <= 0x7e) || (0x80 <= c && c <= 0xfc)){
+           status_push_ch(ptr, c);
+           s2e_conv(ptr->buf[0], ptr->buf[1], &ptr->buf[0], &ptr->buf[1]);
+           code_score(ptr);
+           status_clear(ptr);
+       }else{
+           status_disable(ptr);
+       }
+       break;
+    case 2:
+#ifdef SHIFTJIS_CP932
+       if ((0x40 <= c && c <= 0x7e) || (0x80 <= c && c <= 0xfc)) {
+           status_push_ch(ptr, c);
+           if (s2e_conv(ptr->buf[0], ptr->buf[1], &ptr->buf[0], &ptr->buf[1]) == 0) {
+               set_code_score(ptr, SCORE_CP932);
+               status_clear(ptr);
+               break;
            }
        }
+#endif /* SHIFTJIS_CP932 */
+       status_disable(ptr);
+       break;
+    case 3:
+       if ((0x40 <= c && c <= 0x7e) || (0x80 <= c && c <= 0xfc)){
+           status_push_ch(ptr, c);
+           s2e_conv(ptr->buf[0], ptr->buf[1], &ptr->buf[0], &ptr->buf[1]);
+           set_code_score(ptr, SCORE_CP932);
+           status_clear(ptr);
+       }else{
+           status_disable(ptr);
+       }
+       break;
     }
+}
 
-    if (c2 == EOF) {
-        (*o_zconv)(c2, c1);
-        return;
-    }
-
-    if (alpha_f&1 && c2 == 0x23) {
-       /* JISX0208 Alphabet */
-        c2 = 0;
-    } else if (c2 == 0x21) {
-       /* JISX0208 Kigou */
-       if (0x21==c1) {
-           if (alpha_f&2) {
-               c2 = 0;
-               c1 = SP;
-           } else if (alpha_f&4) {
-                (*o_zconv)(0, SP);
-                (*o_zconv)(0, SP);
-                return;
-           }
-       } else if (alpha_f&1 && 0x20<c1 && c1<0x7f && fv[c1-0x20]) {
-           c2 =  0;
-           c1 = fv[c1-0x20];
-       }
-    }
-
-    if (alpha_f&8 && c2 == 0) {
-       /* HTML Entity */
-       char *entity = 0;
-       switch (c1){
-       case '>': entity = "&gt;"; break;
-       case '<': entity = "&lt;"; break;
-       case '\"': entity = "&quot;"; break;
-       case '&': entity = "&amp;"; break;
+static void
+e_status(struct input_code *ptr, nkf_char c)
+{
+    switch (ptr->stat){
+    case -1:
+       status_check(ptr, c);
+       break;
+    case 0:
+       if (c <= DEL){
+           break;
+       }else if (nkf_char_unicode_p(c)){
+           break;
+       }else if (SS2 == c || (0xa1 <= c && c <= 0xfe)){
+           ptr->stat = 1;
+           status_push_ch(ptr, c);
+#ifdef X0212_ENABLE
+       }else if (0x8f == c){
+           ptr->stat = 2;
+           status_push_ch(ptr, c);
+#endif /* X0212_ENABLE */
+       }else{
+           status_disable(ptr);
        }
-       if (entity){
-           while (*entity) (*o_zconv)(0, *entity++);
-           return;
+       break;
+    case 1:
+       if (0xa1 <= c && c <= 0xfe){
+           status_push_ch(ptr, c);
+           code_score(ptr);
+           status_clear(ptr);
+       }else{
+           status_disable(ptr);
+       }
+       break;
+#ifdef X0212_ENABLE
+    case 2:
+       if (0xa1 <= c && c <= 0xfe){
+           ptr->stat = 1;
+           status_push_ch(ptr, c);
+       }else{
+           status_disable(ptr);
        }
+#endif /* X0212_ENABLE */
     }
+}
 
-    if (alpha_f & 16) {
-       /* JIS X 0208 Katakana to JIS X 0201 Katakana */
-       if (c2 == 0x21) {
-           char c = 0;
-           switch (c1) {
-           case 0x23:
-               /* U+3002 (0x8142) Ideographic Full Stop -> U+FF61 (0xA1) Halfwidth Ideographic Full Stop */
-               c = 0xA1;
-               break;
-           case 0x56:
-               /* U+300C (0x8175) Left Corner Bracket -> U+FF62 (0xA2) Halfwidth Left Corner Bracket */
-               c = 0xA2;
-               break;
-           case 0x57:
-               /* U+300D (0x8176) Right Corner Bracket -> U+FF63 (0xA3) Halfwidth Right Corner Bracket */
-               c = 0xA3;
-               break;
-           case 0x22:
-               /* U+3001 (0x8141) Ideographic Comma -> U+FF64 (0xA4) Halfwidth Ideographic Comma */
-               c = 0xA4;
-               break;
-           case 0x26:
-               /* U+30FB (0x8145) Katakana Middle Dot -> U+FF65 (0xA5) Halfwidth Katakana Middle Dot */
-               c = 0xA5;
-               break;
-           case 0x3C:
-               /* U+30FC (0x815B) Katakana-Hiragana Prolonged Sound Mark -> U+FF70 (0xB0) Halfwidth Katakana-Hiragana Prolonged Sound Mark */
-               c = 0xB0;
-               break;
-           case 0x2B:
-               /* U+309B (0x814A) Katakana-Hiragana Voiced Sound Mark -> U+FF9E (0xDE) Halfwidth Katakana Voiced Sound Mark */
-               c = 0xDE;
-               break;
-           case 0x2C:
-               /* U+309C (0x814B) Katakana-Hiragana Semi-Voiced Sound Mark -> U+FF9F (0xDF) Halfwidth Katakana Semi-Voiced Sound Mark */
-               c = 0xDF;
-               break;
+#ifdef UTF8_INPUT_ENABLE
+static void
+w_status(struct input_code *ptr, nkf_char c)
+{
+    switch (ptr->stat){
+    case -1:
+       status_check(ptr, c);
+       break;
+    case 0:
+       if (c <= DEL){
+           break;
+       }else if (nkf_char_unicode_p(c)){
+           break;
+       }else if (0xc0 <= c && c <= 0xdf){
+           ptr->stat = 1;
+           status_push_ch(ptr, c);
+       }else if (0xe0 <= c && c <= 0xef){
+           ptr->stat = 2;
+           status_push_ch(ptr, c);
+       }else if (0xf0 <= c && c <= 0xf4){
+           ptr->stat = 3;
+           status_push_ch(ptr, c);
+       }else{
+           status_disable(ptr);
+       }
+       break;
+    case 1:
+    case 2:
+       if (0x80 <= c && c <= 0xbf){
+           status_push_ch(ptr, c);
+           if (ptr->index > ptr->stat){
+               int bom = (ptr->buf[0] == 0xef && ptr->buf[1] == 0xbb
+                          && ptr->buf[2] == 0xbf);
+               w2e_conv(ptr->buf[0], ptr->buf[1], ptr->buf[2],
+                        &ptr->buf[0], &ptr->buf[1]);
+               if (!bom){
+                   code_score(ptr);
+               }
+               status_clear(ptr);
            }
-           if (c) {
-               (*o_zconv)(X0201, c);
-               return;
+       }else{
+           status_disable(ptr);
+       }
+       break;
+    case 3:
+       if (0x80 <= c && c <= 0xbf){
+           if (ptr->index < ptr->stat){
+               status_push_ch(ptr, c);
+           } else {
+               status_clear(ptr);
            }
-       } else if (c2 == 0x25) {
-           /* JISX0208 Katakana */
-           static const int fullwidth_to_halfwidth[] =
-           {
-               0x0000, 0x2700, 0x3100, 0x2800, 0x3200, 0x2900, 0x3300, 0x2A00,
-               0x3400, 0x2B00, 0x3500, 0x3600, 0x365E, 0x3700, 0x375E, 0x3800,
-               0x385E, 0x3900, 0x395E, 0x3A00, 0x3A5E, 0x3B00, 0x3B5E, 0x3C00,
-               0x3C5E, 0x3D00, 0x3D5E, 0x3E00, 0x3E5E, 0x3F00, 0x3F5E, 0x4000,
-               0x405E, 0x4100, 0x415E, 0x2F00, 0x4200, 0x425E, 0x4300, 0x435E,
-               0x4400, 0x445E, 0x4500, 0x4600, 0x4700, 0x4800, 0x4900, 0x4A00,
-               0x4A5E, 0x4A5F, 0x4B00, 0x4B5E, 0x4B5F, 0x4C00, 0x4C5E, 0x4C5F,
-               0x4D00, 0x4D5E, 0x4D5F, 0x4E00, 0x4E5E, 0x4E5F, 0x4F00, 0x5000,
-               0x5100, 0x5200, 0x5300, 0x2C00, 0x5400, 0x2D00, 0x5500, 0x2E00,
-               0x5600, 0x5700, 0x5800, 0x5900, 0x5A00, 0x5B00, 0x0000, 0x5C00,
-               0x0000, 0x0000, 0x2600, 0x5D00, 0x335E, 0x0000, 0x0000, 0x0000,
-               0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000
-           };
-           if (fullwidth_to_halfwidth[c1-0x20]){
-               c2 = fullwidth_to_halfwidth[c1-0x20];
-               (*o_zconv)(X0201, c2>>8);
-               if (c2 & 0xFF) {
-                   (*o_zconv)(X0201, c2&0xFF);
-               }
-               return;
+       }else{
+           status_disable(ptr);
+       }
+       break;
+    }
+}
+#endif
+
+static void
+code_status(nkf_char c)
+{
+    int action_flag = 1;
+    struct input_code *result = 0;
+    struct input_code *p = input_code_list;
+    while (p->name){
+       if (!p->status_func) {
+           ++p;
+           continue;
+       }
+       if (!p->status_func)
+           continue;
+       (p->status_func)(p, c);
+       if (p->stat > 0){
+           action_flag = 0;
+       }else if(p->stat == 0){
+           if (result){
+               action_flag = 0;
+           }else{
+               result = p;
+           }
+       }
+       ++p;
+    }
+
+    if (action_flag){
+       if (result && !estab_f){
+           set_iconv(TRUE, result->iconv_func);
+       }else if (c <= DEL){
+           struct input_code *ptr = input_code_list;
+           while (ptr->name){
+               status_reset(ptr);
+               ++ptr;
            }
        }
     }
-    (*o_zconv)(c2,c1);
 }
 
+typedef struct {
+    nkf_buf_t *std_gc_buf;
+    nkf_char broken_state;
+    nkf_buf_t *broken_buf;
+    nkf_char mimeout_state;
+    nkf_buf_t *nfc_buf;
+} nkf_state_t;
 
-#define rot13(c)  ( \
-      ( c < 'A') ? c: \
-      (c <= 'M')  ? (c + 13): \
-      (c <= 'Z')  ? (c - 13): \
-      (c < 'a')   ? (c): \
-      (c <= 'm')  ? (c + 13): \
-      (c <= 'z')  ? (c - 13): \
-      (c) \
-)
+static nkf_state_t *nkf_state = NULL;
 
-#define  rot47(c) ( \
-      ( c < '!') ? c: \
-      ( c <= 'O') ? (c + 47) : \
-      ( c <= '~') ?  (c - 47) : \
-      c \
-)
+#define STD_GC_BUFSIZE (256)
 
-void rot_conv(nkf_char c2, nkf_char c1)
+static void
+nkf_state_init(void)
 {
-    if (c2==0 || c2==X0201 || c2==ISO8859_1) {
-       c1 = rot13(c1);
-    } else if (c2) {
-       c1 = rot47(c1);
-       c2 = rot47(c2);
-    }
-    (*o_rot_conv)(c2,c1);
+    if (nkf_state) {
+       nkf_buf_clear(nkf_state->std_gc_buf);
+       nkf_buf_clear(nkf_state->broken_buf);
+       nkf_buf_clear(nkf_state->nfc_buf);
+    }
+    else {
+       nkf_state = nkf_xmalloc(sizeof(nkf_state_t));
+       nkf_state->std_gc_buf = nkf_buf_new(STD_GC_BUFSIZE);
+       nkf_state->broken_buf = nkf_buf_new(3);
+       nkf_state->nfc_buf = nkf_buf_new(9);
+    }
+    nkf_state->broken_state = 0;
+    nkf_state->mimeout_state = 0;
 }
 
-void hira_conv(nkf_char c2, nkf_char c1)
+#ifndef WIN32DLL
+static nkf_char
+std_getc(FILE *f)
 {
-    if (hira_f & 1) {
-        if (c2 == 0x25) {
-            if (0x20 < c1 && c1 < 0x74) {
-                c2 = 0x24;
-                (*o_hira_conv)(c2,c1);
-                return;
-            } else if (c1 == 0x74 && (output_conv == w_oconv || output_conv == w_oconv16)) {
-                c2 = 0;
-                c1 = CLASS_UNICODE | 0x3094;
-                (*o_hira_conv)(c2,c1);
-                return;
-            }
-        } else if (c2 == 0x21 && (c1 == 0x33 || c1 == 0x34)) {
-            c1 += 2;
-            (*o_hira_conv)(c2,c1);
-            return;
-        }
-    }
-    if (hira_f & 2) {
-        if (c2 == 0 && c1 == (CLASS_UNICODE | 0x3094)) {
-            c2 = 0x25;
-            c1 = 0x74;
-        } else if (c2 == 0x24 && 0x20 < c1 && c1 < 0x74) {
-            c2 = 0x25;
-        } else if (c2 == 0x21 && (c1 == 0x35 || c1 == 0x36)) {
-            c1 -= 2;
-        }
+    if (!nkf_buf_empty_p(nkf_state->std_gc_buf)){
+       return nkf_buf_pop(nkf_state->std_gc_buf);
     }
-    (*o_hira_conv)(c2,c1);
+    return getc(f);
 }
+#endif /*WIN32DLL*/
 
-
-void iso2022jp_check_conv(nkf_char c2, nkf_char c1)
+static nkf_char
+std_ungetc(nkf_char c, FILE *f)
 {
-    static const nkf_char range[RANGE_NUM_MAX][2] = {
-        {0x222f, 0x2239,},
-        {0x2242, 0x2249,},
-        {0x2251, 0x225b,},
-        {0x226b, 0x2271,},
-        {0x227a, 0x227d,},
-        {0x2321, 0x232f,},
-        {0x233a, 0x2340,},
-        {0x235b, 0x2360,},
-        {0x237b, 0x237e,},
-        {0x2474, 0x247e,},
-        {0x2577, 0x257e,},
-        {0x2639, 0x2640,},
-        {0x2659, 0x267e,},
-        {0x2742, 0x2750,},
-        {0x2772, 0x277e,},
-        {0x2841, 0x287e,},
-        {0x4f54, 0x4f7e,},
-        {0x7425, 0x747e},
-    };
-    nkf_char i;
-    nkf_char start, end, c;
+    nkf_buf_push(nkf_state->std_gc_buf, c);
+    return c;
+}
 
-    if(c2 >= 0x00 && c2 <= 0x20 && c1 >= 0x7f && c1 <= 0xff) {
-       c2 = GETA1;
-       c1 = GETA2;
-    }
-    if((c2 >= 0x29 && c2 <= 0x2f) || (c2 >= 0x75 && c2 <= 0x7e)) {
-       c2 = GETA1;
-       c1 = GETA2;
-    }
+#ifndef WIN32DLL
+static void
+std_putc(nkf_char c)
+{
+    if(c!=EOF)
+       putchar(c);
+}
+#endif /*WIN32DLL*/
 
-    for (i = 0; i < RANGE_NUM_MAX; i++) {
-       start = range[i][0];
-       end   = range[i][1];
-       c     = (c2 << 8) + c1;
-       if (c >= start && c <= end) {
-           c2 = GETA1;
-           c1 = GETA2;
-       }
-    }
-    (*o_iso2022jp_check_conv)(c2,c1);
+static unsigned char   hold_buf[HOLD_SIZE*2];
+static int             hold_count = 0;
+static nkf_char
+push_hold_buf(nkf_char c2)
+{
+    if (hold_count >= HOLD_SIZE*2)
+       return (EOF);
+    hold_buf[hold_count++] = (unsigned char)c2;
+    return ((hold_count >= HOLD_SIZE*2) ? EOF : hold_count);
 }
 
+static int
+h_conv(FILE *f, int c1, int c2)
+{
+    int ret, c4, c3;
+    int hold_index;
 
-/* This converts  =?ISO-2022-JP?B?HOGE HOGE?= */
 
-static const unsigned char *mime_pattern[] = {
-    (const unsigned char *)"\075?EUC-JP?B?",
-    (const unsigned char *)"\075?SHIFT_JIS?B?",
-    (const unsigned char *)"\075?ISO-8859-1?Q?",
-    (const unsigned char *)"\075?ISO-8859-1?B?",
-    (const unsigned char *)"\075?ISO-2022-JP?B?",
-    (const unsigned char *)"\075?ISO-2022-JP?Q?",
-#if defined(UTF8_INPUT_ENABLE)
-    (const unsigned char *)"\075?UTF-8?B?",
-    (const unsigned char *)"\075?UTF-8?Q?",
-#endif
-    (const unsigned char *)"\075?US-ASCII?Q?",
-    NULL
-};
+    /** it must NOT be in the kanji shifte sequence      */
+    /** it must NOT be written in JIS7                   */
+    /** and it must be after 2 byte 8bit code            */
 
+    hold_count = 0;
+    push_hold_buf(c1);
+    push_hold_buf(c2);
 
-/* \e$B3:Ev$9$k%3!<%I$NM%@hEY$r>e$2$k$?$a$NL\0u\e(B */
-nkf_char (*mime_priority_func[])(nkf_char c2, nkf_char c1, nkf_char c0) = {
-    e_iconv, s_iconv, 0, 0, 0, 0,
-#if defined(UTF8_INPUT_ENABLE)
-    w_iconv, w_iconv,
-#endif
-    0,
-};
+    while ((c2 = (*i_getc)(f)) != EOF) {
+       if (c2 == ESC){
+           (*i_ungetc)(c2,f);
+           break;
+       }
+       code_status(c2);
+       if (push_hold_buf(c2) == EOF || estab_f) {
+           break;
+       }
+    }
 
-static const nkf_char mime_encode[] = {
-    JAPANESE_EUC, SHIFT_JIS,ISO8859_1, ISO8859_1, X0208, X0201,
-#if defined(UTF8_INPUT_ENABLE)
-    UTF8, UTF8,
-#endif
-    ASCII,
-    0
-};
+    if (!estab_f) {
+       struct input_code *p = input_code_list;
+       struct input_code *result = p;
+       if (c2 == EOF) {
+           code_status(c2);
+       }
+       while (p->name) {
+           if (p->status_func && p->score < result->score) {
+               result = p;
+           }
+           p++;
+       }
+       set_iconv(TRUE, result->iconv_func);
+    }
 
-static const nkf_char mime_encode_method[] = {
-    'B', 'B','Q', 'B', 'B', 'Q',
-#if defined(UTF8_INPUT_ENABLE)
-    'B', 'Q',
-#endif
-    'Q',
-    0
-};
 
+    /** now,
+     ** 1) EOF is detected, or
+     ** 2) Code is established, or
+     ** 3) Buffer is FULL (but last word is pushed)
+     **
+     ** in 1) and 3) cases, we continue to use
+     ** Kanji codes by oconv and leave estab_f unchanged.
+     **/
 
-#define MAXRECOVER 20
-
-void switch_mime_getc(void)
-{
-    if (i_getc!=mime_getc) {
-       i_mgetc = i_getc; i_getc = mime_getc;
-       i_mungetc = i_ungetc; i_ungetc = mime_ungetc;
-       if(mime_f==STRICT_MIME) {
-           i_mgetc_buf = i_mgetc; i_mgetc = mime_getc_buf;
-           i_mungetc_buf = i_mungetc; i_mungetc = mime_ungetc_buf;
+    ret = c2;
+    hold_index = 0;
+    while (hold_index < hold_count){
+       c1 = hold_buf[hold_index++];
+       if (c1 <= DEL){
+           (*iconv)(0, c1, 0);
+           continue;
+       }else if (iconv == s_iconv && 0xa1 <= c1 && c1 <= 0xdf){
+           (*iconv)(JIS_X_0201_1976_K, c1, 0);
+           continue;
+       }
+       if (hold_index < hold_count){
+           c2 = hold_buf[hold_index++];
+       }else{
+           c2 = (*i_getc)(f);
+           if (c2 == EOF){
+               c4 = EOF;
+               break;
+           }
+           code_status(c2);
+       }
+       c3 = 0;
+       switch ((*iconv)(c1, c2, 0)) {  /* can be EUC/SJIS/UTF-8 */
+       case -2:
+           /* 4 bytes UTF-8 */
+           if (hold_index < hold_count){
+               c3 = hold_buf[hold_index++];
+           } else if ((c3 = (*i_getc)(f)) == EOF) {
+               ret = EOF;
+               break;
+           }
+           code_status(c3);
+           if (hold_index < hold_count){
+               c4 = hold_buf[hold_index++];
+           } else if ((c4 = (*i_getc)(f)) == EOF) {
+               c3 = ret = EOF;
+               break;
+           }
+           code_status(c4);
+           (*iconv)(c1, c2, (c3<<8)|c4);
+           break;
+       case -1:
+           /* 3 bytes EUC or UTF-8 */
+           if (hold_index < hold_count){
+               c3 = hold_buf[hold_index++];
+           } else if ((c3 = (*i_getc)(f)) == EOF) {
+               ret = EOF;
+               break;
+           } else {
+               code_status(c3);
+           }
+           (*iconv)(c1, c2, c3);
+           break;
        }
+       if (c3 == EOF) break;
     }
+    return ret;
 }
 
-void unswitch_mime_getc(void)
+/*
+ * Check and Ignore BOM
+ */
+static void
+check_bom(FILE *f)
 {
-    if(mime_f==STRICT_MIME) {
-       i_mgetc = i_mgetc_buf;
-       i_mungetc = i_mungetc_buf;
+    int c2;
+    switch(c2 = (*i_getc)(f)){
+    case 0x00:
+       if((c2 = (*i_getc)(f)) == 0x00){
+           if((c2 = (*i_getc)(f)) == 0xFE){
+               if((c2 = (*i_getc)(f)) == 0xFF){
+                   if(!input_encoding){
+                       set_iconv(TRUE, w_iconv32);
+                   }
+                   if (iconv == w_iconv32) {
+                       input_endian = ENDIAN_BIG;
+                       return;
+                   }
+                   (*i_ungetc)(0xFF,f);
+               }else (*i_ungetc)(c2,f);
+               (*i_ungetc)(0xFE,f);
+           }else if(c2 == 0xFF){
+               if((c2 = (*i_getc)(f)) == 0xFE){
+                   if(!input_encoding){
+                       set_iconv(TRUE, w_iconv32);
+                   }
+                   if (iconv == w_iconv32) {
+                       input_endian = ENDIAN_2143;
+                       return;
+                   }
+                   (*i_ungetc)(0xFF,f);
+               }else (*i_ungetc)(c2,f);
+               (*i_ungetc)(0xFF,f);
+           }else (*i_ungetc)(c2,f);
+           (*i_ungetc)(0x00,f);
+       }else (*i_ungetc)(c2,f);
+       (*i_ungetc)(0x00,f);
+       break;
+    case 0xEF:
+       if((c2 = (*i_getc)(f)) == 0xBB){
+           if((c2 = (*i_getc)(f)) == 0xBF){
+               if(!input_encoding){
+                   set_iconv(TRUE, w_iconv);
+               }
+               if (iconv == w_iconv) {
+                   return;
+               }
+               (*i_ungetc)(0xBF,f);
+           }else (*i_ungetc)(c2,f);
+           (*i_ungetc)(0xBB,f);
+       }else (*i_ungetc)(c2,f);
+       (*i_ungetc)(0xEF,f);
+       break;
+    case 0xFE:
+       if((c2 = (*i_getc)(f)) == 0xFF){
+           if((c2 = (*i_getc)(f)) == 0x00){
+               if((c2 = (*i_getc)(f)) == 0x00){
+                   if(!input_encoding){
+                       set_iconv(TRUE, w_iconv32);
+                   }
+                   if (iconv == w_iconv32) {
+                       input_endian = ENDIAN_3412;
+                       return;
+                   }
+                   (*i_ungetc)(0x00,f);
+               }else (*i_ungetc)(c2,f);
+               (*i_ungetc)(0x00,f);
+           }else (*i_ungetc)(c2,f);
+           if(!input_encoding){
+               set_iconv(TRUE, w_iconv16);
+           }
+           if (iconv == w_iconv16) {
+               input_endian = ENDIAN_BIG;
+               return;
+           }
+           (*i_ungetc)(0xFF,f);
+       }else (*i_ungetc)(c2,f);
+       (*i_ungetc)(0xFE,f);
+       break;
+    case 0xFF:
+       if((c2 = (*i_getc)(f)) == 0xFE){
+           if((c2 = (*i_getc)(f)) == 0x00){
+               if((c2 = (*i_getc)(f)) == 0x00){
+                   if(!input_encoding){
+                       set_iconv(TRUE, w_iconv32);
+                   }
+                   if (iconv == w_iconv32) {
+                       input_endian = ENDIAN_LITTLE;
+                       return;
+                   }
+                   (*i_ungetc)(0x00,f);
+               }else (*i_ungetc)(c2,f);
+               (*i_ungetc)(0x00,f);
+           }else (*i_ungetc)(c2,f);
+           if(!input_encoding){
+               set_iconv(TRUE, w_iconv16);
+           }
+           if (iconv == w_iconv16) {
+               input_endian = ENDIAN_LITTLE;
+               return;
+           }
+           (*i_ungetc)(0xFE,f);
+       }else (*i_ungetc)(c2,f);
+       (*i_ungetc)(0xFF,f);
+       break;
+    default:
+       (*i_ungetc)(c2,f);
+       break;
     }
-    i_getc = i_mgetc;
-    i_ungetc = i_mungetc;
-    if(mime_iconv_back)set_iconv(FALSE, mime_iconv_back);
-    mime_iconv_back = NULL;
 }
 
-nkf_char mime_begin_strict(FILE *f)
+static nkf_char
+broken_getc(FILE *f)
 {
-    nkf_char c1 = 0;
-    int i,j,k;
-    const unsigned char *p,*q;
-    nkf_char r[MAXRECOVER];    /* recovery buffer, max mime pattern length */
+    nkf_char c, c1;
 
-    mime_decode_mode = FALSE;
-    /* =? has been checked */
-    j = 0;
-    p = mime_pattern[j];
-    r[0]='='; r[1]='?';
-
-    for(i=2;p[i]>SP;i++) {                   /* start at =? */
-        if (((r[i] = c1 = (*i_getc)(f))==EOF) || nkf_toupper(c1) != p[i]) {
-            /* pattern fails, try next one */
-            q = p;
-            while (mime_pattern[++j]) {
-               p = mime_pattern[j];
-                for(k=2;k<i;k++)              /* assume length(p) > i */
-                    if (p[k]!=q[k]) break;
-                if (k==i && nkf_toupper(c1)==p[k]) break;
-            }
-           p = mime_pattern[j];
-            if (p) continue;  /* found next one, continue */
-            /* all fails, output from recovery buffer */
-            (*i_ungetc)(c1,f);
-            for(j=0;j<i;j++) {
-                (*oconv)(0,r[j]);
-            }
-            return c1;
-        }
+    if (!nkf_buf_empty_p(nkf_state->broken_buf)) {
+       return nkf_buf_pop(nkf_state->broken_buf);
     }
-    mime_decode_mode = p[i-2];
-
-    mime_iconv_back = iconv;
-    set_iconv(FALSE, mime_priority_func[j]);
-    clr_code_score(find_inputcode_byfunc(mime_priority_func[j]), SCORE_iMIME);
-
-    if (mime_decode_mode=='B') {
-        mimebuf_f = unbuf_f;
-        if (!unbuf_f) {
-            /* do MIME integrity check */
-            return mime_integrity(f,mime_pattern[j]);
-        }
+    c = (*i_bgetc)(f);
+    if (c=='$' && nkf_state->broken_state != ESC
+       && (input_mode == ASCII || input_mode == JIS_X_0201_1976_K)) {
+       c1= (*i_bgetc)(f);
+       nkf_state->broken_state = 0;
+       if (c1=='@'|| c1=='B') {
+           nkf_buf_push(nkf_state->broken_buf, c1);
+           nkf_buf_push(nkf_state->broken_buf, c);
+           return ESC;
+       } else {
+           (*i_bungetc)(c1,f);
+           return c;
+       }
+    } else if (c=='(' && nkf_state->broken_state != ESC
+              && (input_mode == JIS_X_0208 || input_mode == JIS_X_0201_1976_K)) {
+       c1= (*i_bgetc)(f);
+       nkf_state->broken_state = 0;
+       if (c1=='J'|| c1=='B') {
+           nkf_buf_push(nkf_state->broken_buf, c1);
+           nkf_buf_push(nkf_state->broken_buf, c);
+           return ESC;
+       } else {
+           (*i_bungetc)(c1,f);
+           return c;
+       }
+    } else {
+       nkf_state->broken_state = c;
+       return c;
     }
-    switch_mime_getc();
-    mimebuf_f = TRUE;
-    return c1;
-}
-
-nkf_char mime_getc_buf(FILE *f)
-{
-    /* we don't keep eof of Fifo, becase it contains ?= as
-       a terminator. It was checked in mime_integrity. */
-    return ((mimebuf_f)?
-        (*i_mgetc_buf)(f):Fifo(mime_input++));
 }
 
-nkf_char mime_ungetc_buf(nkf_char c, FILE *f)
+static nkf_char
+broken_ungetc(nkf_char c, FILE *f)
 {
-    if (mimebuf_f)
-       (*i_mungetc_buf)(c,f);
-    else
-       Fifo(--mime_input) = (unsigned char)c;
+    if (nkf_buf_length(nkf_state->broken_buf) < 2)
+       nkf_buf_push(nkf_state->broken_buf, c);
     return c;
 }
 
-nkf_char mime_begin(FILE *f)
+static void
+eol_conv(nkf_char c2, nkf_char c1)
 {
-    nkf_char c1;
-    int i,k;
-
-    /* In NONSTRICT mode, only =? is checked. In case of failure, we  */
-    /* re-read and convert again from mime_buffer.  */
-
-    /* =? has been checked */
-    k = mime_last;
-    Fifo(mime_last++)='='; Fifo(mime_last++)='?';
-    for(i=2;i<MAXRECOVER;i++) {                   /* start at =? */
-        /* We accept any character type even if it is breaked by new lines */
-        c1 = (*i_getc)(f); Fifo(mime_last++) = (unsigned char)c1;
-        if (c1==LF||c1==SP||c1==CR||
-                c1=='-'||c1=='_'||is_alnum(c1)) continue;
-        if (c1=='=') {
-            /* Failed. But this could be another MIME preemble */
-            (*i_ungetc)(c1,f);
-            mime_last--;
-            break;
-        }
-        if (c1!='?') break;
-        else {
-            /* c1=='?' */
-            c1 = (*i_getc)(f); Fifo(mime_last++) = (unsigned char)c1;
-            if (!(++i<MAXRECOVER) || c1==EOF) break;
-            if (c1=='b'||c1=='B') {
-                mime_decode_mode = 'B';
-            } else if (c1=='q'||c1=='Q') {
-                mime_decode_mode = 'Q';
-            } else {
-                break;
-            }
-            c1 = (*i_getc)(f); Fifo(mime_last++) = (unsigned char)c1;
-            if (!(++i<MAXRECOVER) || c1==EOF) break;
-            if (c1!='?') {
-                mime_decode_mode = FALSE;
-            }
-            break;
-        }
+    if (guess_f && input_eol != EOF) {
+       if (c2 == 0 && c1 == LF) {
+           if (!input_eol) input_eol = prev_cr ? CRLF : LF;
+           else if (input_eol != (prev_cr ? CRLF : LF)) input_eol = EOF;
+       } else if (c2 == 0 && c1 == CR && input_eol == LF) input_eol = EOF;
+       else if (!prev_cr);
+       else if (!input_eol) input_eol = CR;
+       else if (input_eol != CR) input_eol = EOF;
     }
-    switch_mime_getc();
-    if (!mime_decode_mode) {
-        /* false MIME premble, restart from mime_buffer */
-        mime_decode_mode = 1;  /* no decode, but read from the mime_buffer */
-        /* Since we are in MIME mode until buffer becomes empty,    */
-        /* we never go into mime_begin again for a while.           */
-        return c1;
+    if (prev_cr || (c2 == 0 && c1 == LF)) {
+       prev_cr = 0;
+       if (eolmode_f != LF) (*o_eol_conv)(0, CR);
+       if (eolmode_f != CR) (*o_eol_conv)(0, LF);
     }
-    /* discard mime preemble, and goto MIME mode */
-    mime_last = k;
-    /* do no MIME integrity check */
-    return c1;   /* used only for checking EOF */
+    if (c2 == 0 && c1 == CR) prev_cr = CR;
+    else if (c2 != 0 || c1 != LF) (*o_eol_conv)(c2, c1);
 }
 
-#ifdef CHECK_OPTION
-void no_putc(nkf_char c)
-{
-    ;
-}
+/*
+   Return value of fold_conv()
 
-void debug(const char *str)
-{
-    if (debug_f){
-        fprintf(stderr, "%s\n", str ? str : "NULL");
-    }
-}
-#endif
+   LF  add newline  and output char
+   CR  add newline  and output nothing
+   SP  space
+   0   skip
+   1   (or else) normal output
 
-void set_input_codename(char *codename)
-{
-    if (!input_codename) {
-       input_codename = codename;
-    } else if (strcmp(codename, input_codename) != 0) {
-       input_codename = "";
-    }
-}
+   fold state in prev (previous character)
 
-#if !defined(PERL_XS) && !defined(WIN32DLL)
-void print_guessed_code(char *filename)
-{
-    char *codename = "BINARY";
-    char *str_nlmode = NULL;
-    if (filename != NULL) printf("%s: ", filename);
-    if (input_codename && !*input_codename) {
-       printf("BINARY\n");
-    } else {
-       struct input_code *p = find_inputcode_byfunc(iconv);
-       if (guess_f == 1) {
-           printf("%s\n", input_codename ? input_codename : "ASCII");
-       } else {
-           if (!input_codename) {
-               input_codename = "ASCII";
-           } else if (strcmp(input_codename, "Shift_JIS") == 0) {
-               if (p->score & (SCORE_DEPEND|SCORE_CP932))
-                   input_codename = "CP932";
-           } else if (strcmp(input_codename, "EUC-JP") == 0) {
-               if (p->score & (SCORE_X0212))
-                   input_codename = "EUCJP-MS";
-               else if (p->score & (SCORE_DEPEND|SCORE_CP932))
-                   input_codename = "CP51932";
-           } else if (strcmp(input_codename, "ISO-2022-JP") == 0) {
-               if (p->score & (SCORE_KANA))
-                   input_codename = "CP50221";
-               else if (p->score & (SCORE_DEPEND|SCORE_CP932))
-                   input_codename = "CP50220";
-           }
-           printf("%s%s\n",
-                  input_codename,
-                  input_nextline == CR   ? " (CR)" :
-                  input_nextline == LF   ? " (LF)" :
-                  input_nextline == CRLF ? " (CRLF)" :
-                  input_nextline == EOF  ? " (MIXED NL)" :
-                  "");
-       }
-    }
-}
-#endif /*WIN32DLL*/
+   >0x80 Japanese (X0208/X0201)
+   <0x80 ASCII
+   LF    new line
+   SP    space
 
-#ifdef INPUT_OPTION
+   This fold algorthm does not preserve heading space in a line.
+   This is the main difference from fmt.
+ */
 
-nkf_char hex_getc(nkf_char ch, FILE *f, nkf_char (*g)(FILE *f), nkf_char (*u)(nkf_char c, FILE *f))
-{
-    nkf_char c1, c2, c3;
-    c1 = (*g)(f);
-    if (c1 != ch){
-        return c1;
-    }
-    c2 = (*g)(f);
-    if (!nkf_isxdigit(c2)){
-        (*u)(c2, f);
-        return c1;
-    }
-    c3 = (*g)(f);
-    if (!nkf_isxdigit(c3)){
-        (*u)(c2, f);
-        (*u)(c3, f);
-        return c1;
-    }
-    return (hex2bin(c2) << 4) | hex2bin(c3);
-}
+#define char_size(c2,c1) (c2?2:1)
 
-nkf_char cap_getc(FILE *f)
+static void
+fold_conv(nkf_char c2, nkf_char c1)
 {
-    return hex_getc(':', f, i_cgetc, i_cungetc);
-}
+    nkf_char prev0;
+    nkf_char fold_state;
 
-nkf_char cap_ungetc(nkf_char c, FILE *f)
-{
-    return (*i_cungetc)(c, f);
+    if (c1== CR && !fold_preserve_f) {
+       fold_state=0;  /* ignore cr */
+    }else if (c1== LF&&f_prev==CR && fold_preserve_f) {
+       f_prev = LF;
+       fold_state=0;  /* ignore cr */
+    } else if (c1== BS) {
+       if (f_line>0) f_line--;
+       fold_state =  1;
+    } else if (c2==EOF && f_line != 0) {    /* close open last line */
+       fold_state = LF;
+    } else if ((c1==LF && !fold_preserve_f)
+              || ((c1==CR||(c1==LF&&f_prev!=CR))
+                  && fold_preserve_f)) {
+       /* new line */
+       if (fold_preserve_f) {
+           f_prev = c1;
+           f_line = 0;
+           fold_state =  CR;
+       } else if ((f_prev == c1 && !fold_preserve_f)
+                  || (f_prev == LF && fold_preserve_f)
+                 ) {        /* duplicate newline */
+           if (f_line) {
+               f_line = 0;
+               fold_state =  LF;    /* output two newline */
+           } else {
+               f_line = 0;
+               fold_state =  1;
+           }
+       } else  {
+           if (f_prev&0x80) {     /* Japanese? */
+               f_prev = c1;
+               fold_state =  0;       /* ignore given single newline */
+           } else if (f_prev==SP) {
+               fold_state =  0;
+           } else {
+               f_prev = c1;
+               if (++f_line<=fold_len)
+                   fold_state =  SP;
+               else {
+                   f_line = 0;
+                   fold_state =  CR;        /* fold and output nothing */
+               }
+           }
+       }
+    } else if (c1=='\f') {
+       f_prev = LF;
+       f_line = 0;
+       fold_state =  LF;            /* output newline and clear */
+    } else if ((c2==0 && nkf_isblank(c1)) || (c2 == '!' && c1 == '!')) {
+       /* X0208 kankaku or ascii space */
+       if (f_prev == SP) {
+           fold_state = 0;         /* remove duplicate spaces */
+       } else {
+           f_prev = SP;
+           if (++f_line<=fold_len)
+               fold_state = SP;         /* output ASCII space only */
+           else {
+               f_prev = SP; f_line = 0;
+               fold_state = CR;        /* fold and output nothing */
+           }
+       }
+    } else {
+       prev0 = f_prev; /* we still need this one... , but almost done */
+       f_prev = c1;
+       if (c2 || c2 == JIS_X_0201_1976_K)
+           f_prev |= 0x80;  /* this is Japanese */
+       f_line += char_size(c2,c1);
+       if (f_line<=fold_len) {   /* normal case */
+           fold_state = 1;
+       } else {
+           if (f_line>fold_len+fold_margin) { /* too many kinsoku suspension */
+               f_line = char_size(c2,c1);
+               fold_state =  LF;       /* We can't wait, do fold now */
+           } else if (c2 == JIS_X_0201_1976_K) {
+               /* simple kinsoku rules  return 1 means no folding  */
+               if (c1==(0xde&0x7f)) fold_state = 1; /* \e$B!+\e(B*/
+               else if (c1==(0xdf&0x7f)) fold_state = 1; /* \e$B!,\e(B*/
+               else if (c1==(0xa4&0x7f)) fold_state = 1; /* \e$B!#\e(B*/
+               else if (c1==(0xa3&0x7f)) fold_state = 1; /* \e$B!$\e(B*/
+               else if (c1==(0xa1&0x7f)) fold_state = 1; /* \e$B!W\e(B*/
+               else if (c1==(0xb0&0x7f)) fold_state = 1; /* - */
+               else if (SP<=c1 && c1<=(0xdf&0x7f)) {      /* X0201 */
+                   f_line = 1;
+                   fold_state = LF;/* add one new f_line before this character */
+               } else {
+                   f_line = 1;
+                   fold_state = LF;/* add one new f_line before this character */
+               }
+           } else if (c2==0) {
+               /* kinsoku point in ASCII */
+               if (  c1==')'||    /* { [ ( */
+                   c1==']'||
+                   c1=='}'||
+                   c1=='.'||
+                   c1==','||
+                   c1=='!'||
+                   c1=='?'||
+                   c1=='/'||
+                   c1==':'||
+                   c1==';') {
+                   fold_state = 1;
+                   /* just after special */
+               } else if (!is_alnum(prev0)) {
+                   f_line = char_size(c2,c1);
+                   fold_state = LF;
+               } else if ((prev0==SP) ||   /* ignored new f_line */
+                          (prev0==LF)||        /* ignored new f_line */
+                          (prev0&0x80)) {        /* X0208 - ASCII */
+                   f_line = char_size(c2,c1);
+                   fold_state = LF;/* add one new f_line before this character */
+               } else {
+                   fold_state = 1;  /* default no fold in ASCII */
+               }
+           } else {
+               if (c2=='!') {
+                   if (c1=='"')  fold_state = 1; /* \e$B!"\e(B */
+                   else if (c1=='#')  fold_state = 1; /* \e$B!#\e(B */
+                   else if (c1=='W')  fold_state = 1; /* \e$B!W\e(B */
+                   else if (c1=='K')  fold_state = 1; /* \e$B!K\e(B */
+                   else if (c1=='$')  fold_state = 1; /* \e$B!$\e(B */
+                   else if (c1=='%')  fold_state = 1; /* \e$B!%\e(B */
+                   else if (c1=='\'') fold_state = 1; /* \e$B!\\e(B */
+                   else if (c1=='(')  fold_state = 1; /* \e$B!(\e(B */
+                   else if (c1==')')  fold_state = 1; /* \e$B!)\e(B */
+                   else if (c1=='*')  fold_state = 1; /* \e$B!*\e(B */
+                   else if (c1=='+')  fold_state = 1; /* \e$B!+\e(B */
+                   else if (c1==',')  fold_state = 1; /* \e$B!,\e(B */
+                   /* default no fold in kinsoku */
+                   else {
+                       fold_state = LF;
+                       f_line = char_size(c2,c1);
+                       /* add one new f_line before this character */
+                   }
+               } else {
+                   f_line = char_size(c2,c1);
+                   fold_state = LF;
+                   /* add one new f_line before this character */
+               }
+           }
+       }
+    }
+    /* terminator process */
+    switch(fold_state) {
+    case LF:
+       OCONV_NEWLINE((*o_fconv));
+       (*o_fconv)(c2,c1);
+       break;
+    case 0:
+       return;
+    case CR:
+       OCONV_NEWLINE((*o_fconv));
+       break;
+    case TAB:
+    case SP:
+       (*o_fconv)(0,SP);
+       break;
+    default:
+       (*o_fconv)(c2,c1);
+    }
 }
 
-nkf_char url_getc(FILE *f)
-{
-    return hex_getc('%', f, i_ugetc, i_uungetc);
-}
+static nkf_char z_prev2=0,z_prev1=0;
 
-nkf_char url_ungetc(nkf_char c, FILE *f)
+static void
+z_conv(nkf_char c2, nkf_char c1)
 {
-    return (*i_uungetc)(c, f);
-}
-#endif
 
-#ifdef NUMCHAR_OPTION
-nkf_char numchar_getc(FILE *f)
-{
-    nkf_char (*g)(FILE *) = i_ngetc;
-    nkf_char (*u)(nkf_char c ,FILE *f) = i_nungetc;
-    int i = 0, j;
-    nkf_char buf[8];
-    long c = -1;
+    /* if (c2) c1 &= 0x7f; assertion */
 
-    buf[i] = (*g)(f);
-    if (buf[i] == '&'){
-        buf[++i] = (*g)(f);
-        if (buf[i] == '#'){
-            c = 0;
-            buf[++i] = (*g)(f);
-            if (buf[i] == 'x' || buf[i] == 'X'){
-                for (j = 0; j < 7; j++){
-                    buf[++i] = (*g)(f);
-                    if (!nkf_isxdigit(buf[i])){
-                        if (buf[i] != ';'){
-                            c = -1;
-                        }
-                        break;
-                    }
-                    c <<= 4;
-                    c |= hex2bin(buf[i]);
-                }
-            }else{
-                for (j = 0; j < 8; j++){
-                    if (j){
-                        buf[++i] = (*g)(f);
-                    }
-                    if (!nkf_isdigit(buf[i])){
-                        if (buf[i] != ';'){
-                            c = -1;
-                        }
-                        break;
-                    }
-                    c *= 10;
-                    c += hex2bin(buf[i]);
-                }
-            }
-        }
-    }
-    if (c != -1){
-        return CLASS_UNICODE | c;
+    if (c2 == JIS_X_0201_1976_K && (c1 == 0x20 || c1 == 0x7D || c1 == 0x7E)) {
+       (*o_zconv)(c2,c1);
+       return;
     }
-    while (i > 0){
-        (*u)(buf[i], f);
-        --i;
+
+    if (x0201_f) {
+       if (z_prev2 == JIS_X_0201_1976_K) {
+           if (c2 == JIS_X_0201_1976_K) {
+               if (c1 == (0xde&0x7f)) { /* \e$BByE@\e(B */
+                   z_prev2 = 0;
+                   (*o_zconv)(dv[(z_prev1-SP)*2], dv[(z_prev1-SP)*2+1]);
+                   return;
+               } else if (c1 == (0xdf&0x7f) && ev[(z_prev1-SP)*2]) {  /* \e$BH>ByE@\e(B */
+                   z_prev2 = 0;
+                   (*o_zconv)(ev[(z_prev1-SP)*2], ev[(z_prev1-SP)*2+1]);
+                   return;
+               }
+           }
+           z_prev2 = 0;
+           (*o_zconv)(cv[(z_prev1-SP)*2], cv[(z_prev1-SP)*2+1]);
+       }
+       if (c2 == JIS_X_0201_1976_K) {
+           if (dv[(c1-SP)*2] || ev[(c1-SP)*2]) {
+               /* wait for \e$BByE@\e(B or \e$BH>ByE@\e(B */
+               z_prev1 = c1;
+               z_prev2 = c2;
+               return;
+           } else {
+               (*o_zconv)(cv[(c1-SP)*2], cv[(c1-SP)*2+1]);
+               return;
+           }
+       }
     }
-    return buf[0];
-}
 
-nkf_char numchar_ungetc(nkf_char c, FILE *f)
-{
-    return (*i_nungetc)(c, f);
-}
-#endif
+    if (c2 == EOF) {
+       (*o_zconv)(c2, c1);
+       return;
+    }
 
-#ifdef UNICODE_NORMALIZATION
+    if (alpha_f&1 && c2 == 0x23) {
+       /* JISX0208 Alphabet */
+       c2 = 0;
+    } else if (c2 == 0x21) {
+       /* JISX0208 Kigou */
+       if (0x21==c1) {
+           if (alpha_f&2) {
+               c2 = 0;
+               c1 = SP;
+           } else if (alpha_f&4) {
+               (*o_zconv)(0, SP);
+               (*o_zconv)(0, SP);
+               return;
+           }
+       } else if (alpha_f&1 && 0x20<c1 && c1<0x7f && fv[c1-0x20]) {
+           c2 =  0;
+           c1 = fv[c1-0x20];
+       }
+    }
 
-/* Normalization Form C */
-nkf_char nfc_getc(FILE *f)
-{
-    nkf_char (*g)(FILE *f) = i_nfc_getc;
-    nkf_char (*u)(nkf_char c ,FILE *f) = i_nfc_ungetc;
-    int i=0, j, k=1, lower, upper;
-    nkf_char buf[9];
-    const nkf_nfchar *array;
+    if (alpha_f&8 && c2 == 0) {
+       /* HTML Entity */
+       const char *entity = 0;
+       switch (c1){
+       case '>': entity = "&gt;"; break;
+       case '<': entity = "&lt;"; break;
+       case '\"': entity = "&quot;"; break;
+       case '&': entity = "&amp;"; break;
+       }
+       if (entity){
+           while (*entity) (*o_zconv)(0, *entity++);
+           return;
+       }
+    }
 
-    buf[i] = (*g)(f);
-    while (k > 0 && ((buf[i] & 0xc0) != 0x80)){
-       lower=0, upper=NORMALIZATION_TABLE_LENGTH-1;
-       while (upper >= lower) {
-           j = (lower+upper) / 2;
-           array = normalization_table[j].nfd;
-           for (k=0; k < NORMALIZATION_TABLE_NFD_LENGTH && array[k]; k++){
-               if (array[k] != buf[k]){
-                   array[k] < buf[k] ? (lower = j + 1) : (upper = j - 1);
-                   k = 0;
-                   break;
-               } else if (k >= i)
-                   buf[++i] = (*g)(f);
-           }
-           if (k > 0){
-               array = normalization_table[j].nfc;
-               for (i=0; i < NORMALIZATION_TABLE_NFC_LENGTH && array[i]; i++)
-                   buf[i] = (nkf_char)(array[i]);
-               i--;
+    if (alpha_f & 16) {
+       /* JIS X 0208 Katakana to JIS X 0201 Katakana */
+       if (c2 == 0x21) {
+           nkf_char c = 0;
+           switch (c1) {
+           case 0x23:
+               /* U+3002 (0x8142) Ideographic Full Stop -> U+FF61 (0xA1) Halfwidth Ideographic Full Stop */
+               c = 0xA1;
+               break;
+           case 0x56:
+               /* U+300C (0x8175) Left Corner Bracket -> U+FF62 (0xA2) Halfwidth Left Corner Bracket */
+               c = 0xA2;
+               break;
+           case 0x57:
+               /* U+300D (0x8176) Right Corner Bracket -> U+FF63 (0xA3) Halfwidth Right Corner Bracket */
+               c = 0xA3;
+               break;
+           case 0x22:
+               /* U+3001 (0x8141) Ideographic Comma -> U+FF64 (0xA4) Halfwidth Ideographic Comma */
+               c = 0xA4;
+               break;
+           case 0x26:
+               /* U+30FB (0x8145) Katakana Middle Dot -> U+FF65 (0xA5) Halfwidth Katakana Middle Dot */
+               c = 0xA5;
+               break;
+           case 0x3C:
+               /* U+30FC (0x815B) Katakana-Hiragana Prolonged Sound Mark -> U+FF70 (0xB0) Halfwidth Katakana-Hiragana Prolonged Sound Mark */
+               c = 0xB0;
+               break;
+           case 0x2B:
+               /* U+309B (0x814A) Katakana-Hiragana Voiced Sound Mark -> U+FF9E (0xDE) Halfwidth Katakana Voiced Sound Mark */
+               c = 0xDE;
+               break;
+           case 0x2C:
+               /* U+309C (0x814B) Katakana-Hiragana Semi-Voiced Sound Mark -> U+FF9F (0xDF) Halfwidth Katakana Semi-Voiced Sound Mark */
+               c = 0xDF;
                break;
            }
+           if (c) {
+               (*o_zconv)(JIS_X_0201_1976_K, c);
+               return;
+           }
+       } else if (c2 == 0x25) {
+           /* JISX0208 Katakana */
+           static const int fullwidth_to_halfwidth[] =
+           {
+               0x0000, 0x2700, 0x3100, 0x2800, 0x3200, 0x2900, 0x3300, 0x2A00,
+               0x3400, 0x2B00, 0x3500, 0x3600, 0x365E, 0x3700, 0x375E, 0x3800,
+               0x385E, 0x3900, 0x395E, 0x3A00, 0x3A5E, 0x3B00, 0x3B5E, 0x3C00,
+               0x3C5E, 0x3D00, 0x3D5E, 0x3E00, 0x3E5E, 0x3F00, 0x3F5E, 0x4000,
+               0x405E, 0x4100, 0x415E, 0x2F00, 0x4200, 0x425E, 0x4300, 0x435E,
+               0x4400, 0x445E, 0x4500, 0x4600, 0x4700, 0x4800, 0x4900, 0x4A00,
+               0x4A5E, 0x4A5F, 0x4B00, 0x4B5E, 0x4B5F, 0x4C00, 0x4C5E, 0x4C5F,
+               0x4D00, 0x4D5E, 0x4D5F, 0x4E00, 0x4E5E, 0x4E5F, 0x4F00, 0x5000,
+               0x5100, 0x5200, 0x5300, 0x2C00, 0x5400, 0x2D00, 0x5500, 0x2E00,
+               0x5600, 0x5700, 0x5800, 0x5900, 0x5A00, 0x5B00, 0x0000, 0x5C00,
+               0x0000, 0x0000, 0x2600, 0x5D00, 0x335E, 0x0000, 0x0000, 0x0000,
+               0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000
+           };
+           if (fullwidth_to_halfwidth[c1-0x20]){
+               c2 = fullwidth_to_halfwidth[c1-0x20];
+               (*o_zconv)(JIS_X_0201_1976_K, c2>>8);
+               if (c2 & 0xFF) {
+                   (*o_zconv)(JIS_X_0201_1976_K, c2&0xFF);
+               }
+               return;
+           }
        }
-       while (i > 0)
-           (*u)(buf[i--], f);
     }
-    return buf[0];
+    (*o_zconv)(c2,c1);
 }
 
-nkf_char nfc_ungetc(nkf_char c, FILE *f)
-{
-    return (*i_nfc_ungetc)(c, f);
-}
-#endif /* UNICODE_NORMALIZATION */
 
+#define rot13(c)  ( \
+                  ( c < 'A') ? c: \
+                  (c <= 'M')  ? (c + 13): \
+                  (c <= 'Z')  ? (c - 13): \
+                  (c < 'a')   ? (c): \
+                  (c <= 'm')  ? (c + 13): \
+                  (c <= 'z')  ? (c - 13): \
+                  (c) \
+                 )
 
-nkf_char
-mime_getc(FILE *f)
+#define  rot47(c) ( \
+                  ( c < '!') ? c: \
+                  ( c <= 'O') ? (c + 47) : \
+                  ( c <= '~') ?  (c - 47) : \
+                  c \
+                 )
+
+static void
+rot_conv(nkf_char c2, nkf_char c1)
 {
-    nkf_char c1, c2, c3, c4, cc;
-    nkf_char t1, t2, t3, t4, mode, exit_mode;
-    nkf_char lwsp_count;
-    char *lwsp_buf;
-    char *lwsp_buf_new;
-    nkf_char lwsp_size = 128;
-
-    if (mime_top != mime_last) {  /* Something is in FIFO */
-        return  Fifo(mime_top++);
-    }
-    if (mime_decode_mode==1 ||mime_decode_mode==FALSE) {
-       mime_decode_mode=FALSE;
-       unswitch_mime_getc();
-       return (*i_getc)(f);
+    if (c2 == 0 || c2 == JIS_X_0201_1976_K || c2 == ISO_8859_1) {
+       c1 = rot13(c1);
+    } else if (c2) {
+       c1 = rot47(c1);
+       c2 = rot47(c2);
     }
+    (*o_rot_conv)(c2,c1);
+}
 
-    if (mimebuf_f == FIXED_MIME)
-        exit_mode = mime_decode_mode;
-    else
-        exit_mode = FALSE;
-    if (mime_decode_mode == 'Q') {
-        if ((c1 = (*i_mgetc)(f)) == EOF) return (EOF);
-restart_mime_q:
-        if (c1=='_' && mimebuf_f != FIXED_MIME) return SP;
-       if (c1<=SP || DEL<=c1) {
-           mime_decode_mode = exit_mode; /* prepare for quit */
-           return c1;
+static void
+hira_conv(nkf_char c2, nkf_char c1)
+{
+    if (hira_f & 1) {
+       if (c2 == 0x25) {
+           if (0x20 < c1 && c1 < 0x74) {
+               c2 = 0x24;
+               (*o_hira_conv)(c2,c1);
+               return;
+           } else if (c1 == 0x74 && nkf_enc_unicode_p(output_encoding)) {
+               c2 = 0;
+               c1 = nkf_char_unicode_new(0x3094);
+               (*o_hira_conv)(c2,c1);
+               return;
+           }
+       } else if (c2 == 0x21 && (c1 == 0x33 || c1 == 0x34)) {
+           c1 += 2;
+           (*o_hira_conv)(c2,c1);
+           return;
        }
-        if (c1!='=' && (c1!='?' || mimebuf_f == FIXED_MIME)) {
-           return c1;
+    }
+    if (hira_f & 2) {
+       if (c2 == 0 && c1 == nkf_char_unicode_new(0x3094)) {
+           c2 = 0x25;
+           c1 = 0x74;
+       } else if (c2 == 0x24 && 0x20 < c1 && c1 < 0x74) {
+           c2 = 0x25;
+       } else if (c2 == 0x21 && (c1 == 0x35 || c1 == 0x36)) {
+           c1 -= 2;
        }
+    }
+    (*o_hira_conv)(c2,c1);
+}
 
-        mime_decode_mode = exit_mode; /* prepare for quit */
-        if ((c2 = (*i_mgetc)(f)) == EOF) return (EOF);
-        if (c1=='?'&&c2=='=' && mimebuf_f != FIXED_MIME) {
-            /* end Q encoding */
-            input_mode = exit_mode;
-           lwsp_count = 0;
-           lwsp_buf = malloc((lwsp_size+5)*sizeof(char));
-           if (lwsp_buf==NULL) {
-               perror("can't malloc");
-               return -1;
-           }
-           while ((c1=(*i_getc)(f))!=EOF) {
-               switch (c1) {
-               case LF:
-               case CR:
-                   if (c1==LF) {
-                       if ((c1=(*i_getc)(f))!=EOF && (c1==SP||c1==TAB)) {
-                           i_ungetc(SP,f);
-                           continue;
-                       } else {
-                           i_ungetc(c1,f);
-                       }
-                       c1 = LF;
-                   } else {
-                       if ((c1=(*i_getc)(f))!=EOF && c1 == LF) {
-                           if ((c1=(*i_getc)(f))!=EOF && (c1==SP||c1==TAB)) {
-                               i_ungetc(SP,f);
-                               continue;
-                           } else {
-                               i_ungetc(c1,f);
-                           }
-                           i_ungetc(LF,f);
-                       } else {
-                           i_ungetc(c1,f);
-                       }
-                       c1 = CR;
-                   }
-                   break;
-               case SP:
-               case TAB:
-                   lwsp_buf[lwsp_count] = (unsigned char)c1;
-                   if (lwsp_count++>lwsp_size){
-                       lwsp_size <<= 1;
-                       lwsp_buf_new = realloc(lwsp_buf, (lwsp_size+5)*sizeof(char));
-                       if (lwsp_buf_new==NULL) {
-                           free(lwsp_buf);
-                           perror("can't realloc");
-                           return -1;
-                       }
-                       lwsp_buf = lwsp_buf_new;
-                   }
-                   continue;
-               }
-               break;
-           }
-           if (lwsp_count > 0 && (c1 != '=' || (lwsp_buf[lwsp_count-1] != SP && lwsp_buf[lwsp_count-1] != TAB))) {
-               i_ungetc(c1,f);
-               for(lwsp_count--;lwsp_count>0;lwsp_count--)
-                   i_ungetc(lwsp_buf[lwsp_count],f);
-               c1 = lwsp_buf[0];
-           }
-           free(lwsp_buf);
-            return c1;
-        }
-        if (c1=='='&&c2<SP) { /* this is soft wrap */
-            while((c1 =  (*i_mgetc)(f)) <=SP) {
-               if ((c1 = (*i_mgetc)(f)) == EOF) return (EOF);
-           }
-            mime_decode_mode = 'Q'; /* still in MIME */
-           goto restart_mime_q;
-       }
-        if (c1=='?') {
-            mime_decode_mode = 'Q'; /* still in MIME */
-            (*i_mungetc)(c2,f);
-            return c1;
-        }
-        if ((c3 = (*i_mgetc)(f)) == EOF) return (EOF);
-        if (c2<=SP) return c2;
-        mime_decode_mode = 'Q'; /* still in MIME */
-        return ((hex2bin(c2)<<4) + hex2bin(c3));
-    }
-
-    if (mime_decode_mode != 'B') {
-        mime_decode_mode = FALSE;
-        return (*i_mgetc)(f);
-    }
 
+static void
+iso2022jp_check_conv(nkf_char c2, nkf_char c1)
+{
+#define RANGE_NUM_MAX 18
+    static const nkf_char range[RANGE_NUM_MAX][2] = {
+       {0x222f, 0x2239,},
+       {0x2242, 0x2249,},
+       {0x2251, 0x225b,},
+       {0x226b, 0x2271,},
+       {0x227a, 0x227d,},
+       {0x2321, 0x232f,},
+       {0x233a, 0x2340,},
+       {0x235b, 0x2360,},
+       {0x237b, 0x237e,},
+       {0x2474, 0x247e,},
+       {0x2577, 0x257e,},
+       {0x2639, 0x2640,},
+       {0x2659, 0x267e,},
+       {0x2742, 0x2750,},
+       {0x2772, 0x277e,},
+       {0x2841, 0x287e,},
+       {0x4f54, 0x4f7e,},
+       {0x7425, 0x747e},
+    };
+    nkf_char i;
+    nkf_char start, end, c;
 
-    /* Base64 encoding */
-    /*
-        MIME allows line break in the middle of
-        Base64, but we are very pessimistic in decoding
-        in unbuf mode because MIME encoded code may broken by
-        less or editor's control sequence (such as ESC-[-K in unbuffered
-        mode. ignore incomplete MIME.
-    */
-    mode = mime_decode_mode;
-    mime_decode_mode = exit_mode;  /* prepare for quit */
-
-    while ((c1 = (*i_mgetc)(f))<=SP) {
-        if (c1==EOF)
-            return (EOF);
+    if(c2 >= 0x00 && c2 <= 0x20 && c1 >= 0x7f && c1 <= 0xff) {
+       c2 = GETA1;
+       c1 = GETA2;
     }
-mime_c2_retry:
-    if ((c2 = (*i_mgetc)(f))<=SP) {
-        if (c2==EOF)
-            return (EOF);
-       if (mime_f != STRICT_MIME) goto mime_c2_retry;
-        if (mimebuf_f!=FIXED_MIME) input_mode = ASCII;
-        return c2;
+    if((c2 >= 0x29 && c2 <= 0x2f) || (c2 >= 0x75 && c2 <= 0x7e)) {
+       c2 = GETA1;
+       c1 = GETA2;
     }
-    if ((c1 == '?') && (c2 == '=')) {
-        input_mode = ASCII;
-       lwsp_count = 0;
-       lwsp_buf = malloc((lwsp_size+5)*sizeof(char));
-       if (lwsp_buf==NULL) {
-           perror("can't malloc");
-           return -1;
-       }
-       while ((c1=(*i_getc)(f))!=EOF) {
-           switch (c1) {
-           case LF:
-           case CR:
-               if (c1==LF) {
-                   if ((c1=(*i_getc)(f))!=EOF && (c1==SP||c1==TAB)) {
-                       i_ungetc(SP,f);
-                       continue;
-                   } else {
-                       i_ungetc(c1,f);
-                   }
-                   c1 = LF;
-               } else {
-                   if ((c1=(*i_getc)(f))!=EOF) {
-                       if (c1==SP) {
-                           i_ungetc(SP,f);
-                           continue;
-                       } else if ((c1=(*i_getc)(f))!=EOF && (c1==SP||c1==TAB)) {
-                           i_ungetc(SP,f);
-                           continue;
-                       } else {
-                           i_ungetc(c1,f);
-                       }
-                       i_ungetc(LF,f);
-                   } else {
-                       i_ungetc(c1,f);
-                   }
-                   c1 = CR;
-               }
-               break;
-           case SP:
-           case TAB:
-               lwsp_buf[lwsp_count] = (unsigned char)c1;
-               if (lwsp_count++>lwsp_size){
-                   lwsp_size <<= 1;
-                   lwsp_buf_new = realloc(lwsp_buf, (lwsp_size+5)*sizeof(char));
-                   if (lwsp_buf_new==NULL) {
-                       free(lwsp_buf);
-                       perror("can't realloc");
-                       return -1;
-                   }
-                   lwsp_buf = lwsp_buf_new;
-               }
-               continue;
-           }
-           break;
-       }
-       if (lwsp_count > 0 && (c1 != '=' || (lwsp_buf[lwsp_count-1] != SP && lwsp_buf[lwsp_count-1] != TAB))) {
-           i_ungetc(c1,f);
-           for(lwsp_count--;lwsp_count>0;lwsp_count--)
-               i_ungetc(lwsp_buf[lwsp_count],f);
-           c1 = lwsp_buf[0];
+
+    for (i = 0; i < RANGE_NUM_MAX; i++) {
+       start = range[i][0];
+       end   = range[i][1];
+       c     = (c2 << 8) + c1;
+       if (c >= start && c <= end) {
+           c2 = GETA1;
+           c1 = GETA2;
        }
-       free(lwsp_buf);
-        return c1;
-    }
-mime_c3_retry:
-    if ((c3 = (*i_mgetc)(f))<=SP) {
-        if (c3==EOF)
-            return (EOF);
-       if (mime_f != STRICT_MIME) goto mime_c3_retry;
-        if (mimebuf_f!=FIXED_MIME) input_mode = ASCII;
-        return c3;
-    }
-mime_c4_retry:
-    if ((c4 = (*i_mgetc)(f))<=SP) {
-        if (c4==EOF)
-            return (EOF);
-       if (mime_f != STRICT_MIME) goto mime_c4_retry;
-        if (mimebuf_f!=FIXED_MIME) input_mode = ASCII;
-        return c4;
     }
+    (*o_iso2022jp_check_conv)(c2,c1);
+}
 
-    mime_decode_mode = mode; /* still in MIME sigh... */
 
-    /* BASE 64 decoding */
+/* This converts  =?ISO-2022-JP?B?HOGE HOGE?= */
 
-    t1 = 0x3f & base64decode(c1);
-    t2 = 0x3f & base64decode(c2);
-    t3 = 0x3f & base64decode(c3);
-    t4 = 0x3f & base64decode(c4);
-    cc = ((t1 << 2) & 0x0fc) | ((t2 >> 4) & 0x03);
-    if (c2 != '=') {
-        Fifo(mime_last++) = (unsigned char)cc;
-        cc = ((t2 << 4) & 0x0f0) | ((t3 >> 2) & 0x0f);
-        if (c3 != '=') {
-            Fifo(mime_last++) = (unsigned char)cc;
-            cc = ((t3 << 6) & 0x0c0) | (t4 & 0x3f);
-            if (c4 != '=')
-                Fifo(mime_last++) = (unsigned char)cc;
-        }
-    } else {
-        return c1;
-    }
-    return  Fifo(mime_top++);
+static const unsigned char *mime_pattern[] = {
+    (const unsigned char *)"\075?EUC-JP?B?",
+    (const unsigned char *)"\075?SHIFT_JIS?B?",
+    (const unsigned char *)"\075?ISO-8859-1?Q?",
+    (const unsigned char *)"\075?ISO-8859-1?B?",
+    (const unsigned char *)"\075?ISO-2022-JP?B?",
+    (const unsigned char *)"\075?ISO-2022-JP?Q?",
+#if defined(UTF8_INPUT_ENABLE)
+    (const unsigned char *)"\075?UTF-8?B?",
+    (const unsigned char *)"\075?UTF-8?Q?",
+#endif
+    (const unsigned char *)"\075?US-ASCII?Q?",
+    NULL
+};
+
+
+/* \e$B3:Ev$9$k%3!<%I$NM%@hEY$r>e$2$k$?$a$NL\0u\e(B */
+nkf_char (*mime_priority_func[])(nkf_char c2, nkf_char c1, nkf_char c0) = {
+    e_iconv, s_iconv, 0, 0, 0, 0,
+#if defined(UTF8_INPUT_ENABLE)
+    w_iconv, w_iconv,
+#endif
+    0,
+};
+
+static const nkf_char mime_encode[] = {
+    EUC_JP, SHIFT_JIS, ISO_8859_1, ISO_8859_1, JIS_X_0208, JIS_X_0201_1976_K,
+#if defined(UTF8_INPUT_ENABLE)
+    UTF_8, UTF_8,
+#endif
+    ASCII,
+    0
+};
+
+static const nkf_char mime_encode_method[] = {
+    'B', 'B','Q', 'B', 'B', 'Q',
+#if defined(UTF8_INPUT_ENABLE)
+    'B', 'Q',
+#endif
+    'Q',
+    0
+};
+
+
+/* MIME preprocessor fifo */
+
+#define MIME_BUF_SIZE   (1024)    /* 2^n ring buffer */
+#define MIME_BUF_MASK   (MIME_BUF_SIZE-1)
+#define mime_input_buf(n)        mime_input_state.buf[(n)&MIME_BUF_MASK]
+static struct {
+    unsigned char buf[MIME_BUF_SIZE];
+    unsigned int  top;
+    unsigned int  last;  /* decoded */
+    unsigned int  input; /* undecoded */
+} mime_input_state;
+static nkf_char (*mime_iconv_back)(nkf_char c2,nkf_char c1,nkf_char c0) = NULL;
+
+#define MAXRECOVER 20
+
+static void
+mime_input_buf_unshift(nkf_char c)
+{
+    mime_input_buf(--mime_input_state.top) = (unsigned char)c;
+}
+
+static nkf_char
+mime_ungetc(nkf_char c, FILE *f)
+{
+    mime_input_buf_unshift(c);
+    return c;
 }
 
-nkf_char mime_ungetc(nkf_char c, FILE *f)
+static nkf_char
+mime_ungetc_buf(nkf_char c, FILE *f)
 {
-    Fifo(--mime_top) = (unsigned char)c;
+    if (mimebuf_f)
+       (*i_mungetc_buf)(c,f);
+    else
+       mime_input_buf(--mime_input_state.input) = (unsigned char)c;
     return c;
 }
 
-nkf_char mime_integrity(FILE *f, const unsigned char *p)
+static nkf_char
+mime_getc_buf(FILE *f)
+{
+    /* we don't keep eof of mime_input_buf, becase it contains ?= as
+       a terminator. It was checked in mime_integrity. */
+    return ((mimebuf_f)?
+           (*i_mgetc_buf)(f):mime_input_buf(mime_input_state.input++));
+}
+
+static void
+switch_mime_getc(void)
+{
+    if (i_getc!=mime_getc) {
+       i_mgetc = i_getc; i_getc = mime_getc;
+       i_mungetc = i_ungetc; i_ungetc = mime_ungetc;
+       if(mime_f==STRICT_MIME) {
+           i_mgetc_buf = i_mgetc; i_mgetc = mime_getc_buf;
+           i_mungetc_buf = i_mungetc; i_mungetc = mime_ungetc_buf;
+       }
+    }
+}
+
+static void
+unswitch_mime_getc(void)
+{
+    if(mime_f==STRICT_MIME) {
+       i_mgetc = i_mgetc_buf;
+       i_mungetc = i_mungetc_buf;
+    }
+    i_getc = i_mgetc;
+    i_ungetc = i_mungetc;
+    if(mime_iconv_back)set_iconv(FALSE, mime_iconv_back);
+    mime_iconv_back = NULL;
+}
+
+static nkf_char
+mime_integrity(FILE *f, const unsigned char *p)
 {
     nkf_char c,d;
     unsigned int q;
     /* In buffered mode, read until =? or NL or buffer full
      */
-    mime_input = mime_top;
-    mime_last = mime_top;
+    mime_input_state.input = mime_input_state.top;
+    mime_input_state.last = mime_input_state.top;
 
-    while(*p) Fifo(mime_input++) = *p++;
+    while(*p) mime_input_buf(mime_input_state.input++) = *p++;
     d = 0;
-    q = mime_input;
+    q = mime_input_state.input;
     while((c=(*i_getc)(f))!=EOF) {
-        if (((mime_input-mime_top)&MIME_BUF_MASK)==0) {
+       if (((mime_input_state.input-mime_input_state.top)&MIME_BUF_MASK)==0) {
            break;   /* buffer full */
        }
-        if (c=='=' && d=='?') {
-            /* checked. skip header, start decode */
-            Fifo(mime_input++) = (unsigned char)c;
-            /* mime_last_input = mime_input; */
-            mime_input = q;
+       if (c=='=' && d=='?') {
+           /* checked. skip header, start decode */
+           mime_input_buf(mime_input_state.input++) = (unsigned char)c;
+           /* mime_last_input = mime_input_state.input; */
+           mime_input_state.input = q;
            switch_mime_getc();
-            return 1;
-        }
-        if (!( (c=='+'||c=='/'|| c=='=' || c=='?' || is_alnum(c))))
-            break;
-        /* Should we check length mod 4? */
-        Fifo(mime_input++) = (unsigned char)c;
-        d=c;
+           return 1;
+       }
+       if (!( (c=='+'||c=='/'|| c=='=' || c=='?' || is_alnum(c))))
+           break;
+       /* Should we check length mod 4? */
+       mime_input_buf(mime_input_state.input++) = (unsigned char)c;
+       d=c;
     }
     /* In case of Incomplete MIME, no MIME decode  */
-    Fifo(mime_input++) = (unsigned char)c;
-    mime_last = mime_input;     /* point undecoded buffer */
-    mime_decode_mode = 1;              /* no decode on Fifo last in mime_getc */
+    mime_input_buf(mime_input_state.input++) = (unsigned char)c;
+    mime_input_state.last = mime_input_state.input;     /* point undecoded buffer */
+    mime_decode_mode = 1;              /* no decode on mime_input_buf last in mime_getc */
     switch_mime_getc();         /* anyway we need buffered getc */
     return 1;
 }
 
-nkf_char base64decode(nkf_char c)
+static nkf_char
+mime_begin_strict(FILE *f)
 {
-    int             i;
-    if (c > '@') {
-        if (c < '[') {
-            i = c - 'A';                        /* A..Z 0-25 */
-        } else {
-            i = c - 'G'     /* - 'a' + 26 */ ;  /* a..z 26-51 */
-       }
-    } else if (c > '/') {
-        i = c - '0' + '4'   /* - '0' + 52 */ ;  /* 0..9 52-61 */
-    } else if (c == '+') {
-        i = '>'             /* 62 */ ;          /* +  62 */
-    } else {
-        i = '?'             /* 63 */ ;          /* / 63 */
-    }
-    return (i);
-}
-
-static const char basis_64[] =
-   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    nkf_char c1 = 0;
+    int i,j,k;
+    const unsigned char *p,*q;
+    nkf_char r[MAXRECOVER];    /* recovery buffer, max mime pattern length */
 
-static nkf_char b64c;
-#define MIMEOUT_BUF_LENGTH (60)
-char mimeout_buf[MIMEOUT_BUF_LENGTH+1];
-int mimeout_buf_count = 0;
-int mimeout_preserve_space = 0;
-#define itoh4(c)   (c>=10?c+'A'-10:c+'0')
+    mime_decode_mode = FALSE;
+    /* =? has been checked */
+    j = 0;
+    p = mime_pattern[j];
+    r[0]='='; r[1]='?';
 
-void open_mime(nkf_char mode)
-{
-    const unsigned char *p;
-    int i;
-    int j;
-    p  = mime_pattern[0];
-    for(i=0;mime_pattern[i];i++) {
-       if (mode == mime_encode[i]) {
-           p = mime_pattern[i];
-           break;
+    for(i=2;p[i]>SP;i++) {                   /* start at =? */
+       if (((r[i] = c1 = (*i_getc)(f))==EOF) || nkf_toupper(c1) != p[i]) {
+           /* pattern fails, try next one */
+           q = p;
+           while (mime_pattern[++j]) {
+               p = mime_pattern[j];
+               for(k=2;k<i;k++)              /* assume length(p) > i */
+                   if (p[k]!=q[k]) break;
+               if (k==i && nkf_toupper(c1)==p[k]) break;
+           }
+           p = mime_pattern[j];
+           if (p) continue;  /* found next one, continue */
+           /* all fails, output from recovery buffer */
+           (*i_ungetc)(c1,f);
+           for(j=0;j<i;j++) {
+               (*oconv)(0,r[j]);
+           }
+           return c1;
        }
     }
-    mimeout_mode = mime_encode_method[i];
+    mime_decode_mode = p[i-2];
 
-    i = 0;
-    if (base64_count>45) {
-       if (mimeout_buf_count>0 && nkf_isblank(mimeout_buf[i])){
-            (*o_mputc)(mimeout_buf[i]);
-           i++;
-       }
-       (*o_mputc)(LF);
-       (*o_mputc)(SP);
-       base64_count = 1;
-       if (!mimeout_preserve_space && mimeout_buf_count>0
-           && (mimeout_buf[i]==SP || mimeout_buf[i]==TAB
-               || mimeout_buf[i]==CR || mimeout_buf[i]==LF)) {
-           i++;
+    mime_iconv_back = iconv;
+    set_iconv(FALSE, mime_priority_func[j]);
+    clr_code_score(find_inputcode_byfunc(mime_priority_func[j]), SCORE_iMIME);
+
+    if (mime_decode_mode=='B') {
+       mimebuf_f = unbuf_f;
+       if (!unbuf_f) {
+           /* do MIME integrity check */
+           return mime_integrity(f,mime_pattern[j]);
        }
     }
-    if (!mimeout_preserve_space) {
-       for (;i<mimeout_buf_count;i++) {
-           if (mimeout_buf[i]==SP || mimeout_buf[i]==TAB
-               || mimeout_buf[i]==CR || mimeout_buf[i]==LF) {
-               (*o_mputc)(mimeout_buf[i]);
-               base64_count ++;
+    switch_mime_getc();
+    mimebuf_f = TRUE;
+    return c1;
+}
+
+static nkf_char
+mime_begin(FILE *f)
+{
+    nkf_char c1;
+    int i,k;
+
+    /* In NONSTRICT mode, only =? is checked. In case of failure, we  */
+    /* re-read and convert again from mime_buffer.  */
+
+    /* =? has been checked */
+    k = mime_input_state.last;
+    mime_input_buf(mime_input_state.last++)='='; mime_input_buf(mime_input_state.last++)='?';
+    for(i=2;i<MAXRECOVER;i++) {                   /* start at =? */
+       /* We accept any character type even if it is breaked by new lines */
+       c1 = (*i_getc)(f); mime_input_buf(mime_input_state.last++) = (unsigned char)c1;
+       if (c1==LF||c1==SP||c1==CR||
+           c1=='-'||c1=='_'||is_alnum(c1)) continue;
+       if (c1=='=') {
+           /* Failed. But this could be another MIME preemble */
+           (*i_ungetc)(c1,f);
+           mime_input_state.last--;
+           break;
+       }
+       if (c1!='?') break;
+       else {
+           /* c1=='?' */
+           c1 = (*i_getc)(f); mime_input_buf(mime_input_state.last++) = (unsigned char)c1;
+           if (!(++i<MAXRECOVER) || c1==EOF) break;
+           if (c1=='b'||c1=='B') {
+               mime_decode_mode = 'B';
+           } else if (c1=='q'||c1=='Q') {
+               mime_decode_mode = 'Q';
            } else {
                break;
            }
+           c1 = (*i_getc)(f); mime_input_buf(mime_input_state.last++) = (unsigned char)c1;
+           if (!(++i<MAXRECOVER) || c1==EOF) break;
+           if (c1!='?') {
+               mime_decode_mode = FALSE;
+           }
+           break;
        }
     }
-    mimeout_preserve_space = FALSE;
-
-    while(*p) {
-        (*o_mputc)(*p++);
-        base64_count ++;
-    }
-    j = mimeout_buf_count;
-    mimeout_buf_count = 0;
-    for (;i<j;i++) {
-       mime_putc(mimeout_buf[i]);
+    switch_mime_getc();
+    if (!mime_decode_mode) {
+       /* false MIME premble, restart from mime_buffer */
+       mime_decode_mode = 1;  /* no decode, but read from the mime_buffer */
+       /* Since we are in MIME mode until buffer becomes empty,    */
+       /* we never go into mime_begin again for a while.           */
+       return c1;
     }
+    /* discard mime preemble, and goto MIME mode */
+    mime_input_state.last = k;
+    /* do no MIME integrity check */
+    return c1;   /* used only for checking EOF */
 }
 
-void close_mime(void)
+#ifdef CHECK_OPTION
+static void
+no_putc(nkf_char c)
 {
-    (*o_mputc)('?');
-    (*o_mputc)('=');
-    base64_count += 2;
-    mimeout_mode = 0;
+    ;
 }
 
-void eof_mime(void)
+static void
+debug(const char *str)
 {
-    switch(mimeout_mode) {
-    case 'Q':
-    case 'B':
-       break;
-    case 2:
-       (*o_mputc)(basis_64[((b64c & 0x3)<< 4)]);
-       (*o_mputc)('=');
-       (*o_mputc)('=');
-       base64_count += 3;
-       break;
-    case 1:
-       (*o_mputc)(basis_64[((b64c & 0xF) << 2)]);
-       (*o_mputc)('=');
-       base64_count += 2;
-       break;
+    if (debug_f){
+       fprintf(stderr, "%s\n", str ? str : "NULL");
     }
-    if (mimeout_mode) {
-       if (mimeout_f!=FIXED_MIME) {
-           close_mime();
-       } else if (mimeout_mode != 'Q')
-           mimeout_mode = 'B';
+}
+#endif
+
+static void
+set_input_codename(const char *codename)
+{
+    if (!input_codename) {
+       input_codename = codename;
+    } else if (strcmp(codename, input_codename) != 0) {
+       input_codename = "";
     }
 }
 
-void mimeout_addchar(nkf_char c)
+static const char*
+get_guessed_code(void)
 {
-    switch(mimeout_mode) {
-    case 'Q':
-       if (c==CR||c==LF) {
-           (*o_mputc)(c);
-           base64_count = 0;
-       } else if(!nkf_isalnum(c)) {
-           (*o_mputc)('=');
-           (*o_mputc)(itoh4(((c>>4)&0xf)));
-           (*o_mputc)(itoh4((c&0xf)));
-           base64_count += 3;
+    if (input_codename && !*input_codename) {
+       input_codename = "BINARY";
+    } else {
+       struct input_code *p = find_inputcode_byfunc(iconv);
+       if (!input_codename) {
+           input_codename = "ASCII";
+       } else if (strcmp(input_codename, "Shift_JIS") == 0) {
+           if (p->score & (SCORE_DEPEND|SCORE_CP932))
+               input_codename = "CP932";
+       } else if (strcmp(input_codename, "EUC-JP") == 0) {
+           if (p->score & (SCORE_X0212))
+               input_codename = "EUCJP-MS";
+           else if (p->score & (SCORE_DEPEND|SCORE_CP932))
+               input_codename = "CP51932";
+       } else if (strcmp(input_codename, "ISO-2022-JP") == 0) {
+           if (p->score & (SCORE_KANA))
+               input_codename = "CP50221";
+           else if (p->score & (SCORE_DEPEND|SCORE_CP932))
+               input_codename = "CP50220";
+       }
+    }
+    return input_codename;
+}
+
+#if !defined(PERL_XS) && !defined(WIN32DLL)
+static void
+print_guessed_code(char *filename)
+{
+    if (filename != NULL) printf("%s: ", filename);
+    if (input_codename && !*input_codename) {
+       printf("BINARY\n");
+    } else {
+       input_codename = get_guessed_code();
+       if (guess_f == 1) {
+           printf("%s\n", input_codename);
        } else {
-           (*o_mputc)(c);
-           base64_count++;
+           printf("%s%s\n",
+                  input_codename,
+                  input_eol == CR   ? " (CR)" :
+                  input_eol == LF   ? " (LF)" :
+                  input_eol == CRLF ? " (CRLF)" :
+                  input_eol == EOF  ? " (MIXED NL)" :
+                  "");
        }
-        break;
-    case 'B':
-        b64c=c;
-        (*o_mputc)(basis_64[c>>2]);
-        mimeout_mode=2;
-        base64_count ++;
-        break;
-    case 2:
-        (*o_mputc)(basis_64[((b64c & 0x3)<< 4) | ((c & 0xF0) >> 4)]);
-        b64c=c;
-        mimeout_mode=1;
-        base64_count ++;
-        break;
-    case 1:
-        (*o_mputc)(basis_64[((b64c & 0xF) << 2) | ((c & 0xC0) >>6)]);
-        (*o_mputc)(basis_64[c & 0x3F]);
-        mimeout_mode='B';
-        base64_count += 2;
-        break;
-    default:
-       (*o_mputc)(c);
-       base64_count++;
-        break;
     }
 }
+#endif /*WIN32DLL*/
 
-/*nkf_char mime_lastchar2, mime_lastchar1;*/
+#ifdef INPUT_OPTION
+
+static nkf_char
+hex_getc(nkf_char ch, FILE *f, nkf_char (*g)(FILE *f), nkf_char (*u)(nkf_char c, FILE *f))
+{
+    nkf_char c1, c2, c3;
+    c1 = (*g)(f);
+    if (c1 != ch){
+       return c1;
+    }
+    c2 = (*g)(f);
+    if (!nkf_isxdigit(c2)){
+       (*u)(c2, f);
+       return c1;
+    }
+    c3 = (*g)(f);
+    if (!nkf_isxdigit(c3)){
+       (*u)(c2, f);
+       (*u)(c3, f);
+       return c1;
+    }
+    return (hex2bin(c2) << 4) | hex2bin(c3);
+}
 
-void mime_prechar(nkf_char c2, nkf_char c1)
+static nkf_char
+cap_getc(FILE *f)
 {
-    if (mimeout_mode){
-        if (c2 == EOF){
-            if (base64_count + mimeout_buf_count/3*4> 73){
-                (*o_base64conv)(EOF,0);
-                (*o_base64conv)(0,LF);
-                (*o_base64conv)(0,SP);
-            }
-        } else if (c2){
-            if (base64_count + mimeout_buf_count/3*4> 66){
-                (*o_base64conv)(EOF,0);
-                (*o_base64conv)(0,LF);
-                (*o_base64conv)(0,SP);
-            }
-        } else {
-            if (base64_count + mimeout_buf_count/3*4> 66){
-                (*o_base64conv)(EOF,0);
-                (*o_base64conv)(0,LF);
-                (*o_base64conv)(0,SP);
-            }
-        }/*else if (mime_lastchar2){
-            if (c1 <=DEL && !nkf_isspace(c1)){
-                (*o_base64conv)(0,SP);
-            }
-        }*/
-    }/*else{
-        if (c2 && mime_lastchar2 == 0
-            && mime_lastchar1 && !nkf_isspace(mime_lastchar1)){
-            (*o_base64conv)(0,SP);
-        }
-    }*/
-    /*mime_lastchar2 = c2;
-    mime_lastchar1 = c1;*/
+    return hex_getc(':', f, i_cgetc, i_cungetc);
 }
 
-void mime_putc(nkf_char c)
+static nkf_char
+cap_ungetc(nkf_char c, FILE *f)
 {
-    int i, j;
-    nkf_char lastchar;
+    return (*i_cungetc)(c, f);
+}
 
-    if (mimeout_f == FIXED_MIME){
-        if (mimeout_mode == 'Q'){
-            if (base64_count > 71){
-                if (c!=CR && c!=LF) {
-                    (*o_mputc)('=');
-                    (*o_mputc)(LF);
-                }
-                base64_count = 0;
-            }
-        }else{
-            if (base64_count > 71){
-                eof_mime();
-                (*o_mputc)(LF);
-                base64_count = 0;
-            }
-            if (c == EOF) { /* c==EOF */
-                eof_mime();
-            }
-        }
-        if (c != EOF) { /* c==EOF */
-            mimeout_addchar(c);
-        }
-        return;
-    }
+static nkf_char
+url_getc(FILE *f)
+{
+    return hex_getc('%', f, i_ugetc, i_uungetc);
+}
 
-    /* mimeout_f != FIXED_MIME */
+static nkf_char
+url_ungetc(nkf_char c, FILE *f)
+{
+    return (*i_uungetc)(c, f);
+}
+#endif
 
-    if (c == EOF) { /* c==EOF */
-       j = mimeout_buf_count;
-       mimeout_buf_count = 0;
-       i = 0;
-       if (mimeout_mode) {
-           if (!nkf_isblank(mimeout_buf[j-1])) {
-               for (;i<j;i++) {
-                   if (nkf_isspace(mimeout_buf[i]) && base64_count < 71){
+#ifdef NUMCHAR_OPTION
+static nkf_char
+numchar_getc(FILE *f)
+{
+    nkf_char (*g)(FILE *) = i_ngetc;
+    nkf_char (*u)(nkf_char c ,FILE *f) = i_nungetc;
+    int i = 0, j;
+    nkf_char buf[12];
+    long c = -1;
+
+    buf[i] = (*g)(f);
+    if (buf[i] == '&'){
+       buf[++i] = (*g)(f);
+       if (buf[i] == '#'){
+           c = 0;
+           buf[++i] = (*g)(f);
+           if (buf[i] == 'x' || buf[i] == 'X'){
+               for (j = 0; j < 7; j++){
+                   buf[++i] = (*g)(f);
+                   if (!nkf_isxdigit(buf[i])){
+                       if (buf[i] != ';'){
+                           c = -1;
+                       }
                        break;
                    }
-                   mimeout_addchar(mimeout_buf[i]);
+                   c <<= 4;
+                   c |= hex2bin(buf[i]);
                }
-               eof_mime();
-               for (;i<j;i++) {
-                   mimeout_addchar(mimeout_buf[i]);
-               }
-           } else {
-               for (;i<j;i++) {
-                   mimeout_addchar(mimeout_buf[i]);
+           }else{
+               for (j = 0; j < 8; j++){
+                   if (j){
+                       buf[++i] = (*g)(f);
+                   }
+                   if (!nkf_isdigit(buf[i])){
+                       if (buf[i] != ';'){
+                           c = -1;
+                       }
+                       break;
+                   }
+                   c *= 10;
+                   c += hex2bin(buf[i]);
                }
-               eof_mime();
-           }
-       } else {
-           for (;i<j;i++) {
-               mimeout_addchar(mimeout_buf[i]);
            }
        }
-        return;
     }
+    if (c != -1){
+       return nkf_char_unicode_new(c);
+    }
+    while (i > 0){
+       (*u)(buf[i], f);
+       --i;
+    }
+    return buf[0];
+}
 
-    if (mimeout_mode=='Q') {
-        if (c <= DEL && (output_mode==ASCII ||output_mode == ISO8859_1)) {
-           if (c == CR || c == LF) {
-               close_mime();
-               (*o_mputc)(c);
-               base64_count = 0;
-               return;
-            } else if (c <= SP) {
-                close_mime();
-               if (base64_count > 70) {
-                   (*o_mputc)(LF);
-                   base64_count = 0;
-               }
-               if (!nkf_isblank(c)) {
-                   (*o_mputc)(SP);
-                   base64_count++;
-               }
-            } else {
-               if (base64_count > 70) {
-                   close_mime();
-                   (*o_mputc)(LF);
-                   base64_count = 0;
-                   open_mime(output_mode);
+static nkf_char
+numchar_ungetc(nkf_char c, FILE *f)
+{
+    return (*i_nungetc)(c, f);
+}
+#endif
+
+#ifdef UNICODE_NORMALIZATION
+
+static nkf_char
+nfc_getc(FILE *f)
+{
+    nkf_char (*g)(FILE *f) = i_nfc_getc;
+    nkf_char (*u)(nkf_char c ,FILE *f) = i_nfc_ungetc;
+    nkf_buf_t *buf = nkf_state->nfc_buf;
+    const unsigned char *array;
+    int lower=0, upper=NORMALIZATION_TABLE_LENGTH-1;
+    nkf_char c = (*g)(f);
+
+    if (c == EOF || c > 0xFF || (c & 0xc0) == 0x80) return c;
+
+    nkf_buf_push(buf, c);
+    do {
+       while (lower <= upper) {
+           int mid = (lower+upper) / 2;
+           int len;
+           array = normalization_table[mid].nfd;
+           for (len=0; len < NORMALIZATION_TABLE_NFD_LENGTH && array[len]; len++) {
+               if (len >= nkf_buf_length(buf)) {
+                   c = (*g)(f);
+                   if (c == EOF) {
+                       len = 0;
+                       lower = 1, upper = 0;
+                       break;
+                   }
+                   nkf_buf_push(buf, c);
                }
-               if (!nkf_noescape_mime(c)) {
-                   mimeout_addchar(c);
-                   return;
+               if (array[len] != nkf_buf_at(buf, len)) {
+                   if (array[len] < nkf_buf_at(buf, len)) lower = mid + 1;
+                   else  upper = mid - 1;
+                   len = 0;
+                   break;
                }
            }
-           (*o_mputc)(c);
-           base64_count++;
-        }
-        return;
-    }
-
-    if (mimeout_buf_count > 0){
-        lastchar = mimeout_buf[mimeout_buf_count - 1];
-    }else{
-        lastchar = -1;
-    }
-
-    if (!mimeout_mode) {
-        if (c <= DEL && (output_mode==ASCII ||output_mode == ISO8859_1)) {
-            if (nkf_isspace(c)) {
-                if (c==CR || c==LF) {
-                    base64_count=0;
-                }
-                for (i=0;i<mimeout_buf_count;i++) {
-                    (*o_mputc)(mimeout_buf[i]);
-                    if (mimeout_buf[i] == CR || mimeout_buf[i] == LF){
-                        base64_count = 0;
-                    }else{
-                        base64_count++;
-                    }
-                }
-                mimeout_buf[0] = (char)c;
-                mimeout_buf_count = 1;
-            }else{
-                if (base64_count > 1
-                    && base64_count + mimeout_buf_count > 76
-                   && mimeout_buf[0] != CR && mimeout_buf[0] != LF){
-                    (*o_mputc)(LF);
-                    base64_count = 0;
-                    if (!nkf_isspace(mimeout_buf[0])){
-                        (*o_mputc)(SP);
-                        base64_count++;
-                    }
-                }
-                mimeout_buf[mimeout_buf_count++] = (char)c;
-                if (mimeout_buf_count>MIMEOUT_BUF_LENGTH) {
-                    open_mime(output_mode);
-                }
-            }
-            return;
-        }else{
-            if (lastchar==CR || lastchar == LF){
-                for (i=0;i<mimeout_buf_count;i++) {
-                    (*o_mputc)(mimeout_buf[i]);
-                }
-                base64_count = 0;
-                mimeout_buf_count = 0;
-            }
-            if (lastchar==SP) {
-                for (i=0;i<mimeout_buf_count-1;i++) {
-                    (*o_mputc)(mimeout_buf[i]);
-                    base64_count++;
-                }
-                mimeout_buf[0] = SP;
-                mimeout_buf_count = 1;
-            }
-            open_mime(output_mode);
-        }
-    }else{
-        /* mimeout_mode == 'B', 1, 2 */
-        if ( c<=DEL && (output_mode==ASCII ||output_mode == ISO8859_1)) {
-            if (lastchar == CR || lastchar == LF){
-                if (nkf_isblank(c)) {
-                    for (i=0;i<mimeout_buf_count;i++) {
-                        mimeout_addchar(mimeout_buf[i]);
-                    }
-                    mimeout_buf_count = 0;
-                } else if (SP<c && c<DEL) {
-                    eof_mime();
-                    for (i=0;i<mimeout_buf_count;i++) {
-                        (*o_mputc)(mimeout_buf[i]);
-                    }
-                    base64_count = 0;
-                    mimeout_buf_count = 0;
-                }
-                mimeout_buf[mimeout_buf_count++] = (char)c;
-               return;
-            }
-            if (c==SP || c==TAB || c==CR || c==LF) {
-                for (i=0;i<mimeout_buf_count;i++) {
-                    if (SP<mimeout_buf[i] && mimeout_buf[i]<DEL) {
-                        eof_mime();
-                        for (i=0;i<mimeout_buf_count;i++) {
-                            (*o_mputc)(mimeout_buf[i]);
-                            base64_count++;
-                        }
-                        mimeout_buf_count = 0;
-                    }
-                }
-                mimeout_buf[mimeout_buf_count++] = (char)c;
-                if (mimeout_buf_count>MIMEOUT_BUF_LENGTH) {
-                    eof_mime();
-                    for (i=0;i<mimeout_buf_count;i++) {
-                        (*o_mputc)(mimeout_buf[i]);
-                        base64_count++;
-                    }
-                    mimeout_buf_count = 0;
-                }
-                return;
-           }
-            if (mimeout_buf_count>0 && SP<c && c!='=') {
-                mimeout_buf[mimeout_buf_count++] = (char)c;
-                if (mimeout_buf_count>MIMEOUT_BUF_LENGTH) {
-                    j = mimeout_buf_count;
-                    mimeout_buf_count = 0;
-                    for (i=0;i<j;i++) {
-                        mimeout_addchar(mimeout_buf[i]);
-                    }
-                }
-                return;
-            }
-        }
-    }
-    if (mimeout_buf_count>0) {
-       j = mimeout_buf_count;
-       mimeout_buf_count = 0;
-       for (i=0;i<j;i++) {
-           if (mimeout_buf[i]==CR || mimeout_buf[i]==LF)
+           if (len > 0) {
+               int i;
+               array = normalization_table[mid].nfc;
+               nkf_buf_clear(buf);
+               for (i=0; i < NORMALIZATION_TABLE_NFC_LENGTH && array[i]; i++)
+                   nkf_buf_push(buf, array[i]);
                break;
-           mimeout_addchar(mimeout_buf[i]);
+           }
        }
-       if (i<j) {
-           eof_mime();
-           base64_count=0;
-           for (;i<j;i++) {
-               (*o_mputc)(mimeout_buf[i]);
+    } while (lower <= upper);
+
+    while (nkf_buf_length(buf) > 1) (*u)(nkf_buf_pop(buf), f);
+    c = nkf_buf_pop(buf);
+
+    return c;
+}
+
+static nkf_char
+nfc_ungetc(nkf_char c, FILE *f)
+{
+    return (*i_nfc_ungetc)(c, f);
+}
+#endif /* UNICODE_NORMALIZATION */
+
+
+static nkf_char
+base64decode(nkf_char c)
+{
+    int             i;
+    if (c > '@') {
+       if (c < '[') {
+           i = c - 'A';                        /* A..Z 0-25 */
+       } else if (c == '_') {
+           i = '?'         /* 63 */ ;          /* _  63 */
+       } else {
+           i = c - 'G'     /* - 'a' + 26 */ ;  /* a..z 26-51 */
+       }
+    } else if (c > '/') {
+       i = c - '0' + '4'   /* - '0' + 52 */ ;  /* 0..9 52-61 */
+    } else if (c == '+' || c == '-') {
+       i = '>'             /* 62 */ ;          /* + and -  62 */
+    } else {
+       i = '?'             /* 63 */ ;          /* / 63 */
+    }
+    return (i);
+}
+
+static nkf_char
+mime_getc(FILE *f)
+{
+    nkf_char c1, c2, c3, c4, cc;
+    nkf_char t1, t2, t3, t4, mode, exit_mode;
+    nkf_char lwsp_count;
+    char *lwsp_buf;
+    char *lwsp_buf_new;
+    nkf_char lwsp_size = 128;
+
+    if (mime_input_state.top != mime_input_state.last) {  /* Something is in FIFO */
+       return  mime_input_buf(mime_input_state.top++);
+    }
+    if (mime_decode_mode==1 ||mime_decode_mode==FALSE) {
+       mime_decode_mode=FALSE;
+       unswitch_mime_getc();
+       return (*i_getc)(f);
+    }
+
+    if (mimebuf_f == FIXED_MIME)
+       exit_mode = mime_decode_mode;
+    else
+       exit_mode = FALSE;
+    if (mime_decode_mode == 'Q') {
+       if ((c1 = (*i_mgetc)(f)) == EOF) return (EOF);
+      restart_mime_q:
+       if (c1=='_' && mimebuf_f != FIXED_MIME) return SP;
+       if (c1<=SP || DEL<=c1) {
+           mime_decode_mode = exit_mode; /* prepare for quit */
+           return c1;
+       }
+       if (c1!='=' && (c1!='?' || mimebuf_f == FIXED_MIME)) {
+           return c1;
+       }
+
+       mime_decode_mode = exit_mode; /* prepare for quit */
+       if ((c2 = (*i_mgetc)(f)) == EOF) return (EOF);
+       if (c1=='?'&&c2=='=' && mimebuf_f != FIXED_MIME) {
+           /* end Q encoding */
+           input_mode = exit_mode;
+           lwsp_count = 0;
+           lwsp_buf = nkf_xmalloc((lwsp_size+5)*sizeof(char));
+           while ((c1=(*i_getc)(f))!=EOF) {
+               switch (c1) {
+               case LF:
+               case CR:
+                   if (c1==LF) {
+                       if ((c1=(*i_getc)(f))!=EOF && nkf_isblank(c1)) {
+                           i_ungetc(SP,f);
+                           continue;
+                       } else {
+                           i_ungetc(c1,f);
+                       }
+                       c1 = LF;
+                   } else {
+                       if ((c1=(*i_getc)(f))!=EOF && c1 == LF) {
+                           if ((c1=(*i_getc)(f))!=EOF && nkf_isblank(c1)) {
+                               i_ungetc(SP,f);
+                               continue;
+                           } else {
+                               i_ungetc(c1,f);
+                           }
+                           i_ungetc(LF,f);
+                       } else {
+                           i_ungetc(c1,f);
+                       }
+                       c1 = CR;
+                   }
+                   break;
+               case SP:
+               case TAB:
+                   lwsp_buf[lwsp_count] = (unsigned char)c1;
+                   if (lwsp_count++>lwsp_size){
+                       lwsp_size <<= 1;
+                       lwsp_buf_new = nkf_xrealloc(lwsp_buf, (lwsp_size+5)*sizeof(char));
+                       lwsp_buf = lwsp_buf_new;
+                   }
+                   continue;
+               }
+               break;
+           }
+           if (lwsp_count > 0 && (c1 != '=' || (lwsp_buf[lwsp_count-1] != SP && lwsp_buf[lwsp_count-1] != TAB))) {
+               i_ungetc(c1,f);
+               for(lwsp_count--;lwsp_count>0;lwsp_count--)
+                   i_ungetc(lwsp_buf[lwsp_count],f);
+               c1 = lwsp_buf[0];
+           }
+           nkf_xfree(lwsp_buf);
+           return c1;
+       }
+       if (c1=='='&&c2<SP) { /* this is soft wrap */
+           while((c1 =  (*i_mgetc)(f)) <=SP) {
+               if (c1 == EOF) return (EOF);
+           }
+           mime_decode_mode = 'Q'; /* still in MIME */
+           goto restart_mime_q;
+       }
+       if (c1=='?') {
+           mime_decode_mode = 'Q'; /* still in MIME */
+           (*i_mungetc)(c2,f);
+           return c1;
+       }
+       if ((c3 = (*i_mgetc)(f)) == EOF) return (EOF);
+       if (c2<=SP) return c2;
+       mime_decode_mode = 'Q'; /* still in MIME */
+       return ((hex2bin(c2)<<4) + hex2bin(c3));
+    }
+
+    if (mime_decode_mode != 'B') {
+       mime_decode_mode = FALSE;
+       return (*i_mgetc)(f);
+    }
+
+
+    /* Base64 encoding */
+    /*
+       MIME allows line break in the middle of
+       Base64, but we are very pessimistic in decoding
+       in unbuf mode because MIME encoded code may broken by
+       less or editor's control sequence (such as ESC-[-K in unbuffered
+       mode. ignore incomplete MIME.
+     */
+    mode = mime_decode_mode;
+    mime_decode_mode = exit_mode;  /* prepare for quit */
+
+    while ((c1 = (*i_mgetc)(f))<=SP) {
+       if (c1==EOF)
+           return (EOF);
+    }
+  mime_c2_retry:
+    if ((c2 = (*i_mgetc)(f))<=SP) {
+       if (c2==EOF)
+           return (EOF);
+       if (mime_f != STRICT_MIME) goto mime_c2_retry;
+       if (mimebuf_f!=FIXED_MIME) input_mode = ASCII;
+       return c2;
+    }
+    if ((c1 == '?') && (c2 == '=')) {
+       input_mode = ASCII;
+       lwsp_count = 0;
+       lwsp_buf = nkf_xmalloc((lwsp_size+5)*sizeof(char));
+       while ((c1=(*i_getc)(f))!=EOF) {
+           switch (c1) {
+           case LF:
+           case CR:
+               if (c1==LF) {
+                   if ((c1=(*i_getc)(f))!=EOF && nkf_isblank(c1)) {
+                       i_ungetc(SP,f);
+                       continue;
+                   } else {
+                       i_ungetc(c1,f);
+                   }
+                   c1 = LF;
+               } else {
+                   if ((c1=(*i_getc)(f))!=EOF) {
+                       if (c1==SP) {
+                           i_ungetc(SP,f);
+                           continue;
+                       } else if ((c1=(*i_getc)(f))!=EOF && nkf_isblank(c1)) {
+                           i_ungetc(SP,f);
+                           continue;
+                       } else {
+                           i_ungetc(c1,f);
+                       }
+                       i_ungetc(LF,f);
+                   } else {
+                       i_ungetc(c1,f);
+                   }
+                   c1 = CR;
+               }
+               break;
+           case SP:
+           case TAB:
+               lwsp_buf[lwsp_count] = (unsigned char)c1;
+               if (lwsp_count++>lwsp_size){
+                   lwsp_size <<= 1;
+                   lwsp_buf_new = nkf_xrealloc(lwsp_buf, (lwsp_size+5)*sizeof(char));
+                   lwsp_buf = lwsp_buf_new;
+               }
+               continue;
+           }
+           break;
+       }
+       if (lwsp_count > 0 && (c1 != '=' || (lwsp_buf[lwsp_count-1] != SP && lwsp_buf[lwsp_count-1] != TAB))) {
+           i_ungetc(c1,f);
+           for(lwsp_count--;lwsp_count>0;lwsp_count--)
+               i_ungetc(lwsp_buf[lwsp_count],f);
+           c1 = lwsp_buf[0];
+       }
+       nkf_xfree(lwsp_buf);
+       return c1;
+    }
+  mime_c3_retry:
+    if ((c3 = (*i_mgetc)(f))<=SP) {
+       if (c3==EOF)
+           return (EOF);
+       if (mime_f != STRICT_MIME) goto mime_c3_retry;
+       if (mimebuf_f!=FIXED_MIME) input_mode = ASCII;
+       return c3;
+    }
+  mime_c4_retry:
+    if ((c4 = (*i_mgetc)(f))<=SP) {
+       if (c4==EOF)
+           return (EOF);
+       if (mime_f != STRICT_MIME) goto mime_c4_retry;
+       if (mimebuf_f!=FIXED_MIME) input_mode = ASCII;
+       return c4;
+    }
+
+    mime_decode_mode = mode; /* still in MIME sigh... */
+
+    /* BASE 64 decoding */
+
+    t1 = 0x3f & base64decode(c1);
+    t2 = 0x3f & base64decode(c2);
+    t3 = 0x3f & base64decode(c3);
+    t4 = 0x3f & base64decode(c4);
+    cc = ((t1 << 2) & 0x0fc) | ((t2 >> 4) & 0x03);
+    if (c2 != '=') {
+       mime_input_buf(mime_input_state.last++) = (unsigned char)cc;
+       cc = ((t2 << 4) & 0x0f0) | ((t3 >> 2) & 0x0f);
+       if (c3 != '=') {
+           mime_input_buf(mime_input_state.last++) = (unsigned char)cc;
+           cc = ((t3 << 6) & 0x0c0) | (t4 & 0x3f);
+           if (c4 != '=')
+               mime_input_buf(mime_input_state.last++) = (unsigned char)cc;
+       }
+    } else {
+       return c1;
+    }
+    return  mime_input_buf(mime_input_state.top++);
+}
+
+static const char basis_64[] =
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+#define MIMEOUT_BUF_LENGTH 74
+static struct {
+    char buf[MIMEOUT_BUF_LENGTH+1];
+    int count;
+} mimeout_state;
+
+/*nkf_char mime_lastchar2, mime_lastchar1;*/
+
+static void
+open_mime(nkf_char mode)
+{
+    const unsigned char *p;
+    int i;
+    int j;
+    p  = mime_pattern[0];
+    for(i=0;mime_pattern[i];i++) {
+       if (mode == mime_encode[i]) {
+           p = mime_pattern[i];
+           break;
+       }
+    }
+    mimeout_mode = mime_encode_method[i];
+    i = 0;
+    if (base64_count>45) {
+       if (mimeout_state.count>0 && nkf_isblank(mimeout_state.buf[i])){
+           (*o_mputc)(mimeout_state.buf[i]);
+           i++;
+       }
+       PUT_NEWLINE((*o_mputc));
+       (*o_mputc)(SP);
+       base64_count = 1;
+       if (mimeout_state.count>0 && nkf_isspace(mimeout_state.buf[i])) {
+           i++;
+       }
+    }
+    for (;i<mimeout_state.count;i++) {
+       if (nkf_isspace(mimeout_state.buf[i])) {
+           (*o_mputc)(mimeout_state.buf[i]);
+           base64_count ++;
+       } else {
+           break;
+       }
+    }
+    while(*p) {
+       (*o_mputc)(*p++);
+       base64_count ++;
+    }
+    j = mimeout_state.count;
+    mimeout_state.count = 0;
+    for (;i<j;i++) {
+       mime_putc(mimeout_state.buf[i]);
+    }
+}
+
+static void
+mime_prechar(nkf_char c2, nkf_char c1)
+{
+    if (mimeout_mode > 0){
+       if (c2 == EOF){
+           if (base64_count + mimeout_state.count/3*4> 73){
+               (*o_base64conv)(EOF,0);
+               OCONV_NEWLINE((*o_base64conv));
+               (*o_base64conv)(0,SP);
+               base64_count = 1;
+           }
+       } else {
+           if (base64_count + mimeout_state.count/3*4> 66) {
+               (*o_base64conv)(EOF,0);
+               OCONV_NEWLINE((*o_base64conv));
+               (*o_base64conv)(0,SP);
+               base64_count = 1;
+               mimeout_mode = -1;
+           }
+       }
+    } else if (c2) {
+       if (c2 != EOF && base64_count + mimeout_state.count/3*4> 60) {
+           mimeout_mode =  (output_mode==ASCII ||output_mode == ISO_8859_1) ? 'Q' : 'B';
+           open_mime(output_mode);
+           (*o_base64conv)(EOF,0);
+           OCONV_NEWLINE((*o_base64conv));
+           (*o_base64conv)(0,SP);
+           base64_count = 1;
+           mimeout_mode = -1;
+       }
+    }
+}
+
+static void
+close_mime(void)
+{
+    (*o_mputc)('?');
+    (*o_mputc)('=');
+    base64_count += 2;
+    mimeout_mode = 0;
+}
+
+static void
+eof_mime(void)
+{
+    switch(mimeout_mode) {
+    case 'Q':
+    case 'B':
+       break;
+    case 2:
+       (*o_mputc)(basis_64[((nkf_state->mimeout_state & 0x3)<< 4)]);
+       (*o_mputc)('=');
+       (*o_mputc)('=');
+       base64_count += 3;
+       break;
+    case 1:
+       (*o_mputc)(basis_64[((nkf_state->mimeout_state & 0xF) << 2)]);
+       (*o_mputc)('=');
+       base64_count += 2;
+       break;
+    }
+    if (mimeout_mode > 0) {
+       if (mimeout_f!=FIXED_MIME) {
+           close_mime();
+       } else if (mimeout_mode != 'Q')
+           mimeout_mode = 'B';
+    }
+}
+
+static void
+mimeout_addchar(nkf_char c)
+{
+    switch(mimeout_mode) {
+    case 'Q':
+       if (c==CR||c==LF) {
+           (*o_mputc)(c);
+           base64_count = 0;
+       } else if(!nkf_isalnum(c)) {
+           (*o_mputc)('=');
+           (*o_mputc)(bin2hex(((c>>4)&0xf)));
+           (*o_mputc)(bin2hex((c&0xf)));
+           base64_count += 3;
+       } else {
+           (*o_mputc)(c);
+           base64_count++;
+       }
+       break;
+    case 'B':
+       nkf_state->mimeout_state=c;
+       (*o_mputc)(basis_64[c>>2]);
+       mimeout_mode=2;
+       base64_count ++;
+       break;
+    case 2:
+       (*o_mputc)(basis_64[((nkf_state->mimeout_state & 0x3)<< 4) | ((c & 0xF0) >> 4)]);
+       nkf_state->mimeout_state=c;
+       mimeout_mode=1;
+       base64_count ++;
+       break;
+    case 1:
+       (*o_mputc)(basis_64[((nkf_state->mimeout_state & 0xF) << 2) | ((c & 0xC0) >>6)]);
+       (*o_mputc)(basis_64[c & 0x3F]);
+       mimeout_mode='B';
+       base64_count += 2;
+       break;
+    default:
+       (*o_mputc)(c);
+       base64_count++;
+       break;
+    }
+}
+
+static void
+mime_putc(nkf_char c)
+{
+    int i, j;
+    nkf_char lastchar;
+
+    if (mimeout_f == FIXED_MIME){
+       if (mimeout_mode == 'Q'){
+           if (base64_count > 71){
+               if (c!=CR && c!=LF) {
+                   (*o_mputc)('=');
+                   PUT_NEWLINE((*o_mputc));
+               }
+               base64_count = 0;
+           }
+       }else{
+           if (base64_count > 71){
+               eof_mime();
+               PUT_NEWLINE((*o_mputc));
+               base64_count = 0;
+           }
+           if (c == EOF) { /* c==EOF */
+               eof_mime();
+           }
+       }
+       if (c != EOF) { /* c==EOF */
+           mimeout_addchar(c);
+       }
+       return;
+    }
+
+    /* mimeout_f != FIXED_MIME */
+
+    if (c == EOF) { /* c==EOF */
+       if (mimeout_mode == -1 && mimeout_state.count > 1) open_mime(output_mode);
+       j = mimeout_state.count;
+       mimeout_state.count = 0;
+       i = 0;
+       if (mimeout_mode > 0) {
+           if (!nkf_isblank(mimeout_state.buf[j-1])) {
+               for (;i<j;i++) {
+                   if (nkf_isspace(mimeout_state.buf[i]) && base64_count < 71){
+                       break;
+                   }
+                   mimeout_addchar(mimeout_state.buf[i]);
+               }
+               eof_mime();
+               for (;i<j;i++) {
+                   mimeout_addchar(mimeout_state.buf[i]);
+               }
+           } else {
+               for (;i<j;i++) {
+                   mimeout_addchar(mimeout_state.buf[i]);
+               }
+               eof_mime();
+           }
+       } else {
+           for (;i<j;i++) {
+               mimeout_addchar(mimeout_state.buf[i]);
+           }
+       }
+       return;
+    }
+
+    if (mimeout_state.count > 0){
+       lastchar = mimeout_state.buf[mimeout_state.count - 1];
+    }else{
+       lastchar = -1;
+    }
+
+    if (mimeout_mode=='Q') {
+       if (c <= DEL && (output_mode==ASCII ||output_mode == ISO_8859_1)) {
+           if (c == CR || c == LF) {
+               close_mime();
+               (*o_mputc)(c);
+               base64_count = 0;
+               return;
+           } else if (c <= SP) {
+               close_mime();
+               if (base64_count > 70) {
+                   PUT_NEWLINE((*o_mputc));
+                   base64_count = 0;
+               }
+               if (!nkf_isblank(c)) {
+                   (*o_mputc)(SP);
+                   base64_count++;
+               }
+           } else {
+               if (base64_count > 70) {
+                   close_mime();
+                   PUT_NEWLINE((*o_mputc));
+                   (*o_mputc)(SP);
+                   base64_count = 1;
+                   open_mime(output_mode);
+               }
+               if (!nkf_noescape_mime(c)) {
+                   mimeout_addchar(c);
+                   return;
+               }
+           }
+           (*o_mputc)(c);
+           base64_count++;
+       }
+       return;
+    }
+
+    if (mimeout_mode <= 0) {
+       if (c <= DEL && (output_mode==ASCII ||output_mode == ISO_8859_1)) {
+           if (nkf_isspace(c)) {
+               int flag = 0;
+               if (mimeout_mode == -1) {
+                   flag = 1;
+               }
+               if (c==CR || c==LF) {
+                   if (flag) {
+                       open_mime(output_mode);
+                       output_mode = 0;
+                   } else {
+                       base64_count = 0;
+                   }
+               }
+               for (i=0;i<mimeout_state.count;i++) {
+                   (*o_mputc)(mimeout_state.buf[i]);
+                   if (mimeout_state.buf[i] == CR || mimeout_state.buf[i] == LF){
+                       base64_count = 0;
+                   }else{
+                       base64_count++;
+                   }
+               }
+               if (flag) {
+                   eof_mime();
+                   base64_count = 0;
+                   mimeout_mode = 0;
+               }
+               mimeout_state.buf[0] = (char)c;
+               mimeout_state.count = 1;
+           }else{
+               if (base64_count > 1
+                   && base64_count + mimeout_state.count > 76
+                   && mimeout_state.buf[0] != CR && mimeout_state.buf[0] != LF){
+                   static const char *str = "boundary=\"";
+                   static int len = 10;
+                   i = 0;
+
+                   for (; i < mimeout_state.count - len; ++i) {
+                       if (!strncmp(mimeout_state.buf+i, str, len)) {
+                           i += len - 2;
+                           break;
+                       }
+                   }
+
+                   if (i == 0 || i == mimeout_state.count - len) {
+                       PUT_NEWLINE((*o_mputc));
+                       base64_count = 0;
+                       if (!nkf_isspace(mimeout_state.buf[0])){
+                           (*o_mputc)(SP);
+                           base64_count++;
+                       }
+                   }
+                   else {
+                       int j;
+                       for (j = 0; j <= i; ++j) {
+                           (*o_mputc)(mimeout_state.buf[j]);
+                       }
+                       PUT_NEWLINE((*o_mputc));
+                       base64_count = 1;
+                       for (; j <= mimeout_state.count; ++j) {
+                           mimeout_state.buf[j - i] = mimeout_state.buf[j];
+                       }
+                       mimeout_state.count -= i;
+                   }
+               }
+               mimeout_state.buf[mimeout_state.count++] = (char)c;
+               if (mimeout_state.count>MIMEOUT_BUF_LENGTH) {
+                   open_mime(output_mode);
+               }
+           }
+           return;
+       }else{
+           if (lastchar==CR || lastchar == LF){
+               for (i=0;i<mimeout_state.count;i++) {
+                   (*o_mputc)(mimeout_state.buf[i]);
+               }
+               base64_count = 0;
+               mimeout_state.count = 0;
+           }
+           if (lastchar==SP) {
+               for (i=0;i<mimeout_state.count-1;i++) {
+                   (*o_mputc)(mimeout_state.buf[i]);
+                   base64_count++;
+               }
+               mimeout_state.buf[0] = SP;
+               mimeout_state.count = 1;
+           }
+           open_mime(output_mode);
+       }
+    }else{
+       /* mimeout_mode == 'B', 1, 2 */
+       if ( c<=DEL && (output_mode==ASCII ||output_mode == ISO_8859_1)) {
+           if (lastchar == CR || lastchar == LF){
+               if (nkf_isblank(c)) {
+                   for (i=0;i<mimeout_state.count;i++) {
+                       mimeout_addchar(mimeout_state.buf[i]);
+                   }
+                   mimeout_state.count = 0;
+               } else if (SP<c && c<DEL) {
+                   eof_mime();
+                   for (i=0;i<mimeout_state.count;i++) {
+                       (*o_mputc)(mimeout_state.buf[i]);
+                   }
+                   base64_count = 0;
+                   mimeout_state.count = 0;
+               }
+               mimeout_state.buf[mimeout_state.count++] = (char)c;
+               return;
+           }
+           if (nkf_isspace(c)) {
+               for (i=0;i<mimeout_state.count;i++) {
+                   if (SP<mimeout_state.buf[i] && mimeout_state.buf[i]<DEL) {
+                       eof_mime();
+                       for (i=0;i<mimeout_state.count;i++) {
+                           (*o_mputc)(mimeout_state.buf[i]);
+                           base64_count++;
+                       }
+                       mimeout_state.count = 0;
+                   }
+               }
+               mimeout_state.buf[mimeout_state.count++] = (char)c;
+               if (mimeout_state.count>MIMEOUT_BUF_LENGTH) {
+                   eof_mime();
+                   for (i=0;i<mimeout_state.count;i++) {
+                       (*o_mputc)(mimeout_state.buf[i]);
+                       base64_count++;
+                   }
+                   mimeout_state.count = 0;
+               }
+               return;
+           }
+           if (mimeout_state.count>0 && SP<c && c!='=') {
+               mimeout_state.buf[mimeout_state.count++] = (char)c;
+               if (mimeout_state.count>MIMEOUT_BUF_LENGTH) {
+                   j = mimeout_state.count;
+                   mimeout_state.count = 0;
+                   for (i=0;i<j;i++) {
+                       mimeout_addchar(mimeout_state.buf[i]);
+                   }
+               }
+               return;
+           }
+       }
+    }
+    if (mimeout_state.count>0) {
+       j = mimeout_state.count;
+       mimeout_state.count = 0;
+       for (i=0;i<j;i++) {
+           if (mimeout_state.buf[i]==CR || mimeout_state.buf[i]==LF)
+               break;
+           mimeout_addchar(mimeout_state.buf[i]);
+       }
+       if (i<j) {
+           eof_mime();
+           base64_count=0;
+           for (;i<j;i++) {
+               (*o_mputc)(mimeout_state.buf[i]);
+           }
+           open_mime(output_mode);
+       }
+    }
+    mimeout_addchar(c);
+}
+
+static void
+base64_conv(nkf_char c2, nkf_char c1)
+{
+    mime_prechar(c2, c1);
+    (*o_base64conv)(c2,c1);
+}
+
+#ifdef HAVE_ICONV_H
+typedef struct nkf_iconv_t {
+    iconv_t cd;
+    char *input_buffer;
+    size_t input_buffer_size;
+    char *output_buffer;
+    size_t output_buffer_size;
+}
+
+static nkf_iconv_t
+nkf_iconv_new(char *tocode, char *fromcode)
+{
+    nkf_iconv_t converter;
+
+    converter->input_buffer_size = IOBUF_SIZE;
+    converter->input_buffer = nkf_xmalloc(converter->input_buffer_size);
+    converter->output_buffer_size = IOBUF_SIZE * 2;
+    converter->output_buffer = nkf_xmalloc(converter->output_buffer_size);
+    converter->cd = iconv_open(tocode, fromcode);
+    if (converter->cd == (iconv_t)-1)
+    {
+       switch (errno) {
+       case EINVAL:
+           perror(fprintf("iconv doesn't support %s to %s conversion.", fromcode, tocode));
+           return -1;
+       default:
+           perror("can't iconv_open");
+       }
+    }
+}
+
+static size_t
+nkf_iconv_convert(nkf_iconv_t *converter, FILE *input)
+{
+    size_t invalid = (size_t)0;
+    char *input_buffer = converter->input_buffer;
+    size_t input_length = (size_t)0;
+    char *output_buffer = converter->output_buffer;
+    size_t output_length = converter->output_buffer_size;
+    int c;
+
+    do {
+       if (c != EOF) {
+           while ((c = (*i_getc)(f)) != EOF) {
+               input_buffer[input_length++] = c;
+               if (input_length < converter->input_buffer_size) break;
+           }
+       }
+
+       size_t ret = iconv(converter->cd, &input_buffer, &input_length, &output_buffer, &output_length);
+       while (output_length-- > 0) {
+           (*o_putc)(output_buffer[converter->output_buffer_size-output_length]);
+       }
+       if (ret == (size_t) - 1) {
+           switch (errno) {
+           case EINVAL:
+               if (input_buffer != converter->input_buffer)
+                   memmove(converter->input_buffer, input_buffer, input_length);
+               break;
+           case E2BIG:
+               converter->output_buffer_size *= 2;
+               output_buffer = realloc(converter->outbuf, converter->output_buffer_size);
+               if (output_buffer == NULL) {
+                   perror("can't realloc");
+                   return -1;
+               }
+               converter->output_buffer = output_buffer;
+               break;
+           default:
+               perror("can't iconv");
+               return -1;
+           }
+       } else {
+           invalid += ret;
+       }
+    } while (1);
+
+    return invalid;
+}
+
+
+static void
+nkf_iconv_close(nkf_iconv_t *convert)
+{
+    nkf_xfree(converter->inbuf);
+    nkf_xfree(converter->outbuf);
+    iconv_close(converter->cd);
+}
+#endif
+
+
+static void
+reinit(void)
+{
+    {
+       struct input_code *p = input_code_list;
+       while (p->name){
+           status_reinit(p++);
+       }
+    }
+    unbuf_f = FALSE;
+    estab_f = FALSE;
+    nop_f = FALSE;
+    binmode_f = TRUE;
+    rot_f = FALSE;
+    hira_f = FALSE;
+    alpha_f = FALSE;
+    mime_f = MIME_DECODE_DEFAULT;
+    mime_decode_f = FALSE;
+    mimebuf_f = FALSE;
+    broken_f = FALSE;
+    iso8859_f = FALSE;
+    mimeout_f = FALSE;
+    x0201_f = X0201_DEFAULT;
+    iso2022jp_f = FALSE;
+#if defined(UTF8_INPUT_ENABLE) || defined(UTF8_OUTPUT_ENABLE)
+    ms_ucs_map_f = UCS_MAP_ASCII;
+#endif
+#ifdef UTF8_INPUT_ENABLE
+    no_cp932ext_f = FALSE;
+    no_best_fit_chars_f = FALSE;
+    encode_fallback = NULL;
+    unicode_subchar  = '?';
+    input_endian = ENDIAN_BIG;
+#endif
+#ifdef UTF8_OUTPUT_ENABLE
+    output_bom_f = FALSE;
+    output_endian = ENDIAN_BIG;
+#endif
+#ifdef UNICODE_NORMALIZATION
+    nfc_f = FALSE;
+#endif
+#ifdef INPUT_OPTION
+    cap_f = FALSE;
+    url_f = FALSE;
+    numchar_f = FALSE;
+#endif
+#ifdef CHECK_OPTION
+    noout_f = FALSE;
+    debug_f = FALSE;
+#endif
+    guess_f = 0;
+#ifdef EXEC_IO
+    exec_f = 0;
+#endif
+#ifdef SHIFTJIS_CP932
+    cp51932_f = TRUE;
+    cp932inv_f = TRUE;
+#endif
+#ifdef X0212_ENABLE
+    x0212_f = FALSE;
+    x0213_f = FALSE;
+#endif
+    {
+       int i;
+       for (i = 0; i < 256; i++){
+           prefix_table[i] = 0;
+       }
+    }
+    hold_count = 0;
+    mimeout_state.count = 0;
+    mimeout_mode = 0;
+    base64_count = 0;
+    f_line = 0;
+    f_prev = 0;
+    fold_preserve_f = FALSE;
+    fold_f = FALSE;
+    fold_len = 0;
+    kanji_intro = DEFAULT_J;
+    ascii_intro = DEFAULT_R;
+    fold_margin  = FOLD_MARGIN;
+    o_zconv = no_connection;
+    o_fconv = no_connection;
+    o_eol_conv = no_connection;
+    o_rot_conv = no_connection;
+    o_hira_conv = no_connection;
+    o_base64conv = no_connection;
+    o_iso2022jp_check_conv = no_connection;
+    o_putc = std_putc;
+    i_getc = std_getc;
+    i_ungetc = std_ungetc;
+    i_bgetc = std_getc;
+    i_bungetc = std_ungetc;
+    o_mputc = std_putc;
+    i_mgetc = std_getc;
+    i_mungetc  = std_ungetc;
+    i_mgetc_buf = std_getc;
+    i_mungetc_buf = std_ungetc;
+    output_mode = ASCII;
+    input_mode =  ASCII;
+    mime_decode_mode = FALSE;
+    file_out_f = FALSE;
+    eolmode_f = 0;
+    input_eol = 0;
+    prev_cr = 0;
+    option_mode = 0;
+    z_prev2=0,z_prev1=0;
+#ifdef CHECK_OPTION
+    iconv_for_check = 0;
+#endif
+    input_codename = NULL;
+    input_encoding = NULL;
+    output_encoding = NULL;
+    nkf_state_init();
+#ifdef WIN32DLL
+    reinitdll();
+#endif /*WIN32DLL*/
+}
+
+static int
+module_connection(void)
+{
+    if (input_encoding) set_input_encoding(input_encoding);
+    if (!output_encoding) {
+       output_encoding = nkf_default_encoding();
+    }
+    if (!output_encoding) {
+       if (noout_f || guess_f) output_encoding = nkf_enc_from_index(ISO_2022_JP);
+       else return -1;
+    }
+    set_output_encoding(output_encoding);
+    oconv = nkf_enc_to_oconv(output_encoding);
+    o_putc = std_putc;
+
+    /* replace continucation module, from output side */
+
+    /* output redicrection */
+#ifdef CHECK_OPTION
+    if (noout_f || guess_f){
+       o_putc = no_putc;
+    }
+#endif
+    if (mimeout_f) {
+       o_mputc = o_putc;
+       o_putc = mime_putc;
+       if (mimeout_f == TRUE) {
+           o_base64conv = oconv; oconv = base64_conv;
+       }
+       /* base64_count = 0; */
+    }
+
+    if (eolmode_f || guess_f) {
+       o_eol_conv = oconv; oconv = eol_conv;
+    }
+    if (rot_f) {
+       o_rot_conv = oconv; oconv = rot_conv;
+    }
+    if (iso2022jp_f) {
+       o_iso2022jp_check_conv = oconv; oconv = iso2022jp_check_conv;
+    }
+    if (hira_f) {
+       o_hira_conv = oconv; oconv = hira_conv;
+    }
+    if (fold_f) {
+       o_fconv = oconv; oconv = fold_conv;
+       f_line = 0;
+    }
+    if (alpha_f || x0201_f) {
+       o_zconv = oconv; oconv = z_conv;
+    }
+
+    i_getc = std_getc;
+    i_ungetc = std_ungetc;
+    /* input redicrection */
+#ifdef INPUT_OPTION
+    if (cap_f){
+       i_cgetc = i_getc; i_getc = cap_getc;
+       i_cungetc = i_ungetc; i_ungetc= cap_ungetc;
+    }
+    if (url_f){
+       i_ugetc = i_getc; i_getc = url_getc;
+       i_uungetc = i_ungetc; i_ungetc= url_ungetc;
+    }
+#endif
+#ifdef NUMCHAR_OPTION
+    if (numchar_f){
+       i_ngetc = i_getc; i_getc = numchar_getc;
+       i_nungetc = i_ungetc; i_ungetc= numchar_ungetc;
+    }
+#endif
+#ifdef UNICODE_NORMALIZATION
+    if (nfc_f){
+       i_nfc_getc = i_getc; i_getc = nfc_getc;
+       i_nfc_ungetc = i_ungetc; i_ungetc= nfc_ungetc;
+    }
+#endif
+    if (mime_f && mimebuf_f==FIXED_MIME) {
+       i_mgetc = i_getc; i_getc = mime_getc;
+       i_mungetc = i_ungetc; i_ungetc = mime_ungetc;
+    }
+    if (broken_f & 1) {
+       i_bgetc = i_getc; i_getc = broken_getc;
+       i_bungetc = i_ungetc; i_ungetc = broken_ungetc;
+    }
+    if (input_encoding) {
+       set_iconv(-TRUE, nkf_enc_to_iconv(input_encoding));
+    } else {
+       set_iconv(FALSE, e_iconv);
+    }
+
+    {
+       struct input_code *p = input_code_list;
+       while (p->name){
+           status_reinit(p++);
+       }
+    }
+    return 0;
+}
+
+/*
+   Conversion main loop. Code detection only.
+ */
+
+#if !defined(PERL_XS) && !defined(WIN32DLL)
+static nkf_char
+noconvert(FILE *f)
+{
+    nkf_char    c;
+
+    if (nop_f == 2)
+       module_connection();
+    while ((c = (*i_getc)(f)) != EOF)
+       (*o_putc)(c);
+    (*o_putc)(EOF);
+    return 1;
+}
+#endif
+
+#define NEXT continue        /* no output, get next */
+#define SKIP c2=0;continue        /* no output, get next */
+#define MORE c2=c1;continue  /* need one more byte */
+#define SEND ;               /* output c1 and c2, get next */
+#define LAST break           /* end of loop, go closing  */
+#define set_input_mode(mode) do { \
+    input_mode = mode; \
+    shift_mode = 0; \
+    set_input_codename("ISO-2022-JP"); \
+    debug("ISO-2022-JP"); \
+} while (0)
+
+static int
+kanji_convert(FILE *f)
+{
+    nkf_char c1=0, c2=0, c3=0, c4=0;
+    int shift_mode = 0; /* 0, 1, 2, 3 */
+    int g2 = 0;
+    int is_8bit = FALSE;
+
+    if (input_encoding && !nkf_enc_asciicompat(input_encoding)) {
+       is_8bit = TRUE;
+    }
+
+    input_mode = ASCII;
+    output_mode = ASCII;
+
+    if (module_connection() < 0) {
+#if !defined(PERL_XS) && !defined(WIN32DLL)
+       fprintf(stderr, "no output encoding given\n");
+#endif
+       return -1;
+    }
+    check_bom(f);
+
+#ifdef UTF8_INPUT_ENABLE
+    if(iconv == w_iconv32){
+       while ((c1 = (*i_getc)(f)) != EOF &&
+              (c2 = (*i_getc)(f)) != EOF &&
+              (c3 = (*i_getc)(f)) != EOF &&
+              (c4 = (*i_getc)(f)) != EOF) {
+           nkf_iconv_utf_32(c1, c2, c3, c4);
+       }
+       (*i_ungetc)(EOF, f);
+    }
+    else if (iconv == w_iconv16) {
+       while ((c1 = (*i_getc)(f)) != EOF &&
+              (c2 = (*i_getc)(f)) != EOF) {
+           if (nkf_iconv_utf_16(c1, c2, 0, 0) == -2 &&
+               (c3 = (*i_getc)(f)) != EOF &&
+               (c4 = (*i_getc)(f)) != EOF) {
+               nkf_iconv_utf_16(c1, c2, c3, c4);
+           }
+       }
+       (*i_ungetc)(EOF, f);
+    }
+#endif
+
+    while ((c1 = (*i_getc)(f)) != EOF) {
+#ifdef INPUT_CODE_FIX
+       if (!input_encoding)
+#endif
+           code_status(c1);
+       if (c2) {
+           /* second byte */
+           if (c2 > DEL) {
+               /* in case of 8th bit is on */
+               if (!estab_f&&!mime_decode_mode) {
+                   /* in case of not established yet */
+                   /* It is still ambiguious */
+                   if (h_conv(f, c2, c1)==EOF) {
+                       LAST;
+                   }
+                   else {
+                       SKIP;
+                   }
+               }
+               else {
+                   /* in case of already established */
+                   if (c1 < 0x40) {
+                       /* ignore bogus code */
+                       SKIP;
+                   } else {
+                       SEND;
+                   }
+               }
+           }
+           else {
+               /* 2nd byte of 7 bit code or SJIS */
+               SEND;
+           }
+       }
+       else if (nkf_char_unicode_p(c1)) {
+           (*oconv)(0, c1);
+           NEXT;
+       }
+       else {
+           /* first byte */
+           if (input_mode == JIS_X_0208 && DEL <= c1 && c1 < 0x92) {
+               /* CP5022x */
+               MORE;
+           }else if (input_codename && input_codename[0] == 'I' &&
+                   0xA1 <= c1 && c1 <= 0xDF) {
+               /* JIS X 0201 Katakana in 8bit JIS */
+               c2 = JIS_X_0201_1976_K;
+               c1 &= 0x7f;
+               SEND;
+           } else if (c1 > DEL) {
+               /* 8 bit code */
+               if (!estab_f && !iso8859_f) {
+                   /* not established yet */
+                   MORE;
+               } else { /* estab_f==TRUE */
+                   if (iso8859_f) {
+                       c2 = ISO_8859_1;
+                       c1 &= 0x7f;
+                       SEND;
+                   }
+                   else if ((iconv == s_iconv && 0xA0 <= c1 && c1 <= 0xDF) ||
+                            (ms_ucs_map_f == UCS_MAP_CP10001 && (c1 == 0xFD || c1 == 0xFE))) {
+                       /* JIS X 0201 */
+                       c2 = JIS_X_0201_1976_K;
+                       c1 &= 0x7f;
+                       SEND;
+                   }
+                   else {
+                       /* already established */
+                       MORE;
+                   }
+               }
+           } else if (SP < c1 && c1 < DEL) {
+               /* in case of Roman characters */
+               if (shift_mode) {
+                   /* output 1 shifted byte */
+                   if (iso8859_f) {
+                       c2 = ISO_8859_1;
+                       SEND;
+                   } else if (nkf_byte_jisx0201_katakana_p(c1)){
+                       /* output 1 shifted byte */
+                       c2 = JIS_X_0201_1976_K;
+                       SEND;
+                   } else {
+                       /* look like bogus code */
+                       SKIP;
+                   }
+               } else if (input_mode == JIS_X_0208 || input_mode == JIS_X_0212 ||
+                          input_mode == JIS_X_0213_1 || input_mode == JIS_X_0213_2) {
+                   /* in case of Kanji shifted */
+                   MORE;
+               } else if (c1 == '=' && mime_f && !mime_decode_mode) {
+                   /* Check MIME code */
+                   if ((c1 = (*i_getc)(f)) == EOF) {
+                       (*oconv)(0, '=');
+                       LAST;
+                   } else if (c1 == '?') {
+                       /* =? is mime conversion start sequence */
+                       if(mime_f == STRICT_MIME) {
+                           /* check in real detail */
+                           if (mime_begin_strict(f) == EOF)
+                               LAST;
+                           SKIP;
+                       } else if (mime_begin(f) == EOF)
+                           LAST;
+                       SKIP;
+                   } else {
+                       (*oconv)(0, '=');
+                       (*i_ungetc)(c1,f);
+                       SKIP;
+                   }
+               } else {
+                   /* normal ASCII code */
+                   SEND;
+               }
+           } else if (c1 == SI && (!is_8bit || mime_decode_mode)) {
+               shift_mode = 0;
+               SKIP;
+           } else if (c1 == SO && (!is_8bit || mime_decode_mode)) {
+               shift_mode = 1;
+               SKIP;
+           } else if (c1 == ESC && (!is_8bit || mime_decode_mode)) {
+               if ((c1 = (*i_getc)(f)) == EOF) {
+                   (*oconv)(0, ESC);
+                   LAST;
+               }
+               else if (c1 == '&') {
+                   /* IRR */
+                   if ((c1 = (*i_getc)(f)) == EOF) {
+                       LAST;
+                   } else {
+                       SKIP;
+                   }
+               }
+               else if (c1 == '$') {
+                   /* GZDMx */
+                   if ((c1 = (*i_getc)(f)) == EOF) {
+                       /* don't send bogus code
+                          (*oconv)(0, ESC);
+                          (*oconv)(0, '$'); */
+                       LAST;
+                   } else if (c1 == '@' || c1 == 'B') {
+                       /* JIS X 0208 */
+                       set_input_mode(JIS_X_0208);
+                       SKIP;
+                   } else if (c1 == '(') {
+                       /* GZDM4 */
+                       if ((c1 = (*i_getc)(f)) == EOF) {
+                           /* don't send bogus code
+                              (*oconv)(0, ESC);
+                              (*oconv)(0, '$');
+                              (*oconv)(0, '(');
+                            */
+                           LAST;
+                       } else if (c1 == '@'|| c1 == 'B') {
+                           /* JIS X 0208 */
+                           set_input_mode(JIS_X_0208);
+                           SKIP;
+#ifdef X0212_ENABLE
+                       } else if (c1 == 'D'){
+                           set_input_mode(JIS_X_0212);
+                           SKIP;
+#endif /* X0212_ENABLE */
+                       } else if (c1 == 'O' || c1 == 'Q'){
+                           set_input_mode(JIS_X_0213_1);
+                           SKIP;
+                       } else if (c1 == 'P'){
+                           set_input_mode(JIS_X_0213_2);
+                           SKIP;
+                       } else {
+                           /* could be some special code */
+                           (*oconv)(0, ESC);
+                           (*oconv)(0, '$');
+                           (*oconv)(0, '(');
+                           (*oconv)(0, c1);
+                           SKIP;
+                       }
+                   } else if (broken_f&0x2) {
+                       /* accept any ESC-(-x as broken code ... */
+                       input_mode = JIS_X_0208;
+                       shift_mode = 0;
+                       SKIP;
+                   } else {
+                       (*oconv)(0, ESC);
+                       (*oconv)(0, '$');
+                       (*oconv)(0, c1);
+                       SKIP;
+                   }
+               } else if (c1 == '(') {
+                   /* GZD4 */
+                   if ((c1 = (*i_getc)(f)) == EOF) {
+                       /* don't send bogus code
+                          (*oconv)(0, ESC);
+                          (*oconv)(0, '('); */
+                       LAST;
+                   }
+                   else if (c1 == 'I') {
+                       /* JIS X 0201 Katakana */
+                       set_input_mode(JIS_X_0201_1976_K);
+                       SKIP;
+                   }
+                   else if (c1 == 'B' || c1 == 'J' || c1 == 'H') {
+                       /* ISO-646IRV:1983 or JIS X 0201 Roman or JUNET */
+                       set_input_mode(ASCII);
+                       SKIP;
+                   }
+                   else if (broken_f&0x2) {
+                       set_input_mode(ASCII);
+                       SKIP;
+                   }
+                   else {
+                       (*oconv)(0, ESC);
+                       (*oconv)(0, '(');
+                       SEND;
+                   }
+               }
+               else if (c1 == '.') {
+                   /* G2D6 */
+                   if ((c1 = (*i_getc)(f)) == EOF) {
+                       LAST;
+                   }
+                   else if (c1 == 'A') {
+                       /* ISO-8859-1 */
+                       g2 = ISO_8859_1;
+                       SKIP;
+                   }
+                   else {
+                       (*oconv)(0, ESC);
+                       (*oconv)(0, '.');
+                       SEND;
+                   }
+               }
+               else if (c1 == 'N') {
+                   /* SS2 */
+                   c1 = (*i_getc)(f);
+                   if (g2 == ISO_8859_1) {
+                       c2 = ISO_8859_1;
+                       SEND;
+                   }else{
+                       (*i_ungetc)(c1, f);
+                       /* lonely ESC  */
+                       (*oconv)(0, ESC);
+                       SEND;
+                   }
+               }
+               else {
+                   /* lonely ESC  */
+                   (*oconv)(0, ESC);
+                   SEND;
+               }
+           } else if (c1 == ESC && iconv == s_iconv) {
+               /* ESC in Shift_JIS */
+               if ((c1 = (*i_getc)(f)) == EOF) {
+                   (*oconv)(0, ESC);
+                   LAST;
+               } else if (c1 == '$') {
+                   /* J-PHONE emoji */
+                   if ((c1 = (*i_getc)(f)) == EOF) {
+                       LAST;
+                   } else if (('E' <= c1 && c1 <= 'G') ||
+                              ('O' <= c1 && c1 <= 'Q')) {
+                       /*
+                          NUM : 0 1 2 3 4 5
+                          BYTE: G E F O P Q
+                          C%7 : 1 6 0 2 3 4
+                          C%7 : 0 1 2 3 4 5 6
+                          NUM : 2 0 3 4 5 X 1
+                        */
+                       static const nkf_char jphone_emoji_first_table[7] =
+                       {0xE1E0, 0xDFE0, 0xE2E0, 0xE3E0, 0xE4E0, 0xDFE0, 0xE0E0};
+                       c3 = nkf_char_unicode_new(jphone_emoji_first_table[c1 % 7]);
+                       if ((c1 = (*i_getc)(f)) == EOF) LAST;
+                       while (SP <= c1 && c1 <= 'z') {
+                           (*oconv)(0, c1 + c3);
+                           if ((c1 = (*i_getc)(f)) == EOF) LAST;
+                       }
+                       SKIP;
+                   }
+                   else {
+                       (*oconv)(0, ESC);
+                       (*oconv)(0, '$');
+                       SEND;
+                   }
+               }
+               else {
+                   /* lonely ESC  */
+                   (*oconv)(0, ESC);
+                   SEND;
+               }
+           } else if (c1 == LF || c1 == CR) {
+               if (broken_f&4) {
+                   input_mode = ASCII; set_iconv(FALSE, 0);
+                   SEND;
+               } else if (mime_decode_f && !mime_decode_mode){
+                   if (c1 == LF) {
+                       if ((c1=(*i_getc)(f))!=EOF && c1 == SP) {
+                           i_ungetc(SP,f);
+                           continue;
+                       } else {
+                           i_ungetc(c1,f);
+                       }
+                       c1 = LF;
+                       SEND;
+                   } else  { /* if (c1 == CR)*/
+                       if ((c1=(*i_getc)(f))!=EOF) {
+                           if (c1==SP) {
+                               i_ungetc(SP,f);
+                               continue;
+                           } else if (c1 == LF && (c1=(*i_getc)(f))!=EOF && c1 == SP) {
+                               i_ungetc(SP,f);
+                               continue;
+                           } else {
+                               i_ungetc(c1,f);
+                           }
+                           i_ungetc(LF,f);
+                       } else {
+                           i_ungetc(c1,f);
+                       }
+                       c1 = CR;
+                       SEND;
+                   }
+               }
+           } else
+               SEND;
+       }
+       /* send: */
+       switch(input_mode){
+       case ASCII:
+           switch ((*iconv)(c2, c1, 0)) {  /* can be EUC / SJIS / UTF-8 */
+           case -2:
+               /* 4 bytes UTF-8 */
+               if ((c3 = (*i_getc)(f)) != EOF) {
+                   code_status(c3);
+                   c3 <<= 8;
+                   if ((c4 = (*i_getc)(f)) != EOF) {
+                       code_status(c4);
+                       (*iconv)(c2, c1, c3|c4);
+                   }
+               }
+               break;
+           case -1:
+               /* 3 bytes EUC or UTF-8 */
+               if ((c3 = (*i_getc)(f)) != EOF) {
+                   code_status(c3);
+                   (*iconv)(c2, c1, c3);
+               }
+               break;
+           }
+           break;
+       case JIS_X_0208:
+       case JIS_X_0213_1:
+           if (ms_ucs_map_f &&
+               0x7F <= c2 && c2 <= 0x92 &&
+               0x21 <= c1 && c1 <= 0x7E) {
+               /* CP932 UDC */
+               c1 = nkf_char_unicode_new((c2 - 0x7F) * 94 + c1 - 0x21 + 0xE000);
+               c2 = 0;
+           }
+           (*oconv)(c2, c1); /* this is JIS, not SJIS/EUC case */
+           break;
+#ifdef X0212_ENABLE
+       case JIS_X_0212:
+           (*oconv)(PREFIX_EUCG3 | c2, c1);
+           break;
+#endif /* X0212_ENABLE */
+       case JIS_X_0213_2:
+           (*oconv)(PREFIX_EUCG3 | c2, c1);
+           break;
+       default:
+           (*oconv)(input_mode, c1);  /* other special case */
+       }
+
+       c2 = 0;
+       c3 = 0;
+       continue;
+       /* goto next_word */
+    }
+
+    /* epilogue */
+    (*iconv)(EOF, 0, 0);
+    if (!input_codename)
+    {
+       if (is_8bit) {
+           struct input_code *p = input_code_list;
+           struct input_code *result = p;
+           while (p->name){
+               if (p->score < result->score) result = p;
+               ++p;
+           }
+           set_input_codename(result->name);
+#ifdef CHECK_OPTION
+           debug(result->name);
+#endif
+       }
+    }
+    return 0;
+}
+
+/*
+ * int options(unsigned char *cp)
+ * 
+ * return values:
+ *    0: success
+ *   -1: ArgumentError
+ */
+static int
+options(unsigned char *cp)
+{
+    nkf_char i, j;
+    unsigned char *p;
+    unsigned char *cp_back = NULL;
+    nkf_encoding *enc;
+
+    if (option_mode==1)
+       return 0;
+    while(*cp && *cp++!='-');
+    while (*cp || cp_back) {
+       if(!*cp){
+           cp = cp_back;
+           cp_back = NULL;
+           continue;
+       }
+       p = 0;
+       switch (*cp++) {
+       case '-':  /* literal options */
+           if (!*cp || *cp == SP) {        /* ignore the rest of arguments */
+               option_mode = 1;
+               return 0;
+           }
+           for (i=0;i<sizeof(long_option)/sizeof(long_option[0]);i++) {
+               p = (unsigned char *)long_option[i].name;
+               for (j=0;*p && *p != '=' && *p == cp[j];p++, j++);
+               if (*p == cp[j] || cp[j] == SP){
+                   p = &cp[j] + 1;
+                   break;
+               }
+               p = 0;
+           }
+           if (p == 0) {
+#if !defined(PERL_XS) && !defined(WIN32DLL)
+               fprintf(stderr, "unknown long option: --%s\n", cp);
+#endif
+               return -1;
+           }
+           while(*cp && *cp != SP && cp++);
+           if (long_option[i].alias[0]){
+               cp_back = cp;
+               cp = (unsigned char *)long_option[i].alias;
+           }else{
+#ifndef PERL_XS
+               if (strcmp(long_option[i].name, "help") == 0){
+                   usage();
+                   exit(EXIT_SUCCESS);
+               }
+#endif
+               if (strcmp(long_option[i].name, "ic=") == 0){
+                   enc = nkf_enc_find((char *)p);
+                   if (!enc) continue;
+                   input_encoding = enc;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "oc=") == 0){
+                   enc = nkf_enc_find((char *)p);
+                   /* if (enc <= 0) continue; */
+                   if (!enc) continue;
+                   output_encoding = enc;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "guess=") == 0){
+                   if (p[0] == '0' || p[0] == '1') {
+                       guess_f = 1;
+                   } else {
+                       guess_f = 2;
+                   }
+                   continue;
+               }
+#ifdef OVERWRITE
+               if (strcmp(long_option[i].name, "overwrite") == 0){
+                   file_out_f = TRUE;
+                   overwrite_f = TRUE;
+                   preserve_time_f = TRUE;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "overwrite=") == 0){
+                   file_out_f = TRUE;
+                   overwrite_f = TRUE;
+                   preserve_time_f = TRUE;
+                   backup_f = TRUE;
+                   backup_suffix = (char *)p;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "in-place") == 0){
+                   file_out_f = TRUE;
+                   overwrite_f = TRUE;
+                   preserve_time_f = FALSE;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "in-place=") == 0){
+                   file_out_f = TRUE;
+                   overwrite_f = TRUE;
+                   preserve_time_f = FALSE;
+                   backup_f = TRUE;
+                   backup_suffix = (char *)p;
+                   continue;
+               }
+#endif
+#ifdef INPUT_OPTION
+               if (strcmp(long_option[i].name, "cap-input") == 0){
+                   cap_f = TRUE;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "url-input") == 0){
+                   url_f = TRUE;
+                   continue;
+               }
+#endif
+#ifdef NUMCHAR_OPTION
+               if (strcmp(long_option[i].name, "numchar-input") == 0){
+                   numchar_f = TRUE;
+                   continue;
+               }
+#endif
+#ifdef CHECK_OPTION
+               if (strcmp(long_option[i].name, "no-output") == 0){
+                   noout_f = TRUE;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "debug") == 0){
+                   debug_f = TRUE;
+                   continue;
+               }
+#endif
+               if (strcmp(long_option[i].name, "cp932") == 0){
+#ifdef SHIFTJIS_CP932
+                   cp51932_f = TRUE;
+                   cp932inv_f = -TRUE;
+#endif
+#ifdef UTF8_OUTPUT_ENABLE
+                   ms_ucs_map_f = UCS_MAP_CP932;
+#endif
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "no-cp932") == 0){
+#ifdef SHIFTJIS_CP932
+                   cp51932_f = FALSE;
+                   cp932inv_f = FALSE;
+#endif
+#ifdef UTF8_OUTPUT_ENABLE
+                   ms_ucs_map_f = UCS_MAP_ASCII;
+#endif
+                   continue;
+               }
+#ifdef SHIFTJIS_CP932
+               if (strcmp(long_option[i].name, "cp932inv") == 0){
+                   cp932inv_f = -TRUE;
+                   continue;
+               }
+#endif
+
+#ifdef X0212_ENABLE
+               if (strcmp(long_option[i].name, "x0212") == 0){
+                   x0212_f = TRUE;
+                   continue;
+               }
+#endif
+
+#ifdef EXEC_IO
+               if (strcmp(long_option[i].name, "exec-in") == 0){
+                   exec_f = 1;
+                   return 0;
+               }
+               if (strcmp(long_option[i].name, "exec-out") == 0){
+                   exec_f = -1;
+                   return 0;
+               }
+#endif
+#if defined(UTF8_OUTPUT_ENABLE) && defined(UTF8_INPUT_ENABLE)
+               if (strcmp(long_option[i].name, "no-cp932ext") == 0){
+                   no_cp932ext_f = TRUE;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "no-best-fit-chars") == 0){
+                   no_best_fit_chars_f = TRUE;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "fb-skip") == 0){
+                   encode_fallback = NULL;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "fb-html") == 0){
+                   encode_fallback = encode_fallback_html;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "fb-xml") == 0){
+                   encode_fallback = encode_fallback_xml;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "fb-java") == 0){
+                   encode_fallback = encode_fallback_java;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "fb-perl") == 0){
+                   encode_fallback = encode_fallback_perl;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "fb-subchar") == 0){
+                   encode_fallback = encode_fallback_subchar;
+                   continue;
+               }
+               if (strcmp(long_option[i].name, "fb-subchar=") == 0){
+                   encode_fallback = encode_fallback_subchar;
+                   unicode_subchar = 0;
+                   if (p[0] != '0'){
+                       /* decimal number */
+                       for (i = 0; i < 7 && nkf_isdigit(p[i]); i++){
+                           unicode_subchar *= 10;
+                           unicode_subchar += hex2bin(p[i]);
+                       }
+                   }else if(p[1] == 'x' || p[1] == 'X'){
+                       /* hexadecimal number */
+                       for (i = 2; i < 8 && nkf_isxdigit(p[i]); i++){
+                           unicode_subchar <<= 4;
+                           unicode_subchar |= hex2bin(p[i]);
+                       }
+                   }else{
+                       /* octal number */
+                       for (i = 1; i < 8 && nkf_isoctal(p[i]); i++){
+                           unicode_subchar *= 8;
+                           unicode_subchar += hex2bin(p[i]);
+                       }
+                   }
+                   w16e_conv(unicode_subchar, &i, &j);
+                   unicode_subchar = i<<8 | j;
+                   continue;
+               }
+#endif
+#ifdef UTF8_OUTPUT_ENABLE
+               if (strcmp(long_option[i].name, "ms-ucs-map") == 0){
+                   ms_ucs_map_f = UCS_MAP_MS;
+                   continue;
+               }
+#endif
+#ifdef UNICODE_NORMALIZATION
+               if (strcmp(long_option[i].name, "utf8mac-input") == 0){
+                   nfc_f = TRUE;
+                   continue;
+               }
+#endif
+               if (strcmp(long_option[i].name, "prefix=") == 0){
+                   if (nkf_isgraph(p[0])){
+                       for (i = 1; nkf_isgraph(p[i]); i++){
+                           prefix_table[p[i]] = p[0];
+                       }
+                   }
+                   continue;
+               }
+#if !defined(PERL_XS) && !defined(WIN32DLL)
+               fprintf(stderr, "unsupported long option: --%s\n", long_option[i].name);
+#endif
+               return -1;
+           }
+           continue;
+       case 'b':           /* buffered mode */
+           unbuf_f = FALSE;
+           continue;
+       case 'u':           /* non bufferd mode */
+           unbuf_f = TRUE;
+           continue;
+       case 't':           /* transparent mode */
+           if (*cp=='1') {
+               /* alias of -t */
+               cp++;
+               nop_f = TRUE;
+           } else if (*cp=='2') {
+               /*
+                * -t with put/get
+                *
+                * nkf -t2MB hoge.bin | nkf -t2mB | diff -s - hoge.bin
+                *
+                */
+               cp++;
+               nop_f = 2;
+           } else
+               nop_f = TRUE;
+           continue;
+       case 'j':           /* JIS output */
+       case 'n':
+           output_encoding = nkf_enc_from_index(ISO_2022_JP);
+           continue;
+       case 'e':           /* AT&T EUC output */
+           output_encoding = nkf_enc_from_index(EUCJP_NKF);
+           continue;
+       case 's':           /* SJIS output */
+           output_encoding = nkf_enc_from_index(SHIFT_JIS);
+           continue;
+       case 'l':           /* ISO8859 Latin-1 support, no conversion */
+           iso8859_f = TRUE;  /* Only compatible with ISO-2022-JP */
+           input_encoding = nkf_enc_from_index(ISO_8859_1);
+           continue;
+       case 'i':           /* Kanji IN ESC-$-@/B */
+           if (*cp=='@'||*cp=='B')
+               kanji_intro = *cp++;
+           continue;
+       case 'o':           /* ASCII IN ESC-(-J/B/H */
+           /* ESC ( H was used in initial JUNET messages */
+           if (*cp=='J'||*cp=='B'||*cp=='H')
+               ascii_intro = *cp++;
+           continue;
+       case 'h':
+           /*
+              bit:1   katakana->hiragana
+              bit:2   hiragana->katakana
+            */
+           if ('9'>= *cp && *cp>='0')
+               hira_f |= (*cp++ -'0');
+           else
+               hira_f |= 1;
+           continue;
+       case 'r':
+           rot_f = TRUE;
+           continue;
+#if defined(MSDOS) || defined(__OS2__)
+       case 'T':
+           binmode_f = FALSE;
+           continue;
+#endif
+#ifndef PERL_XS
+       case 'V':
+           show_configuration();
+           exit(EXIT_SUCCESS);
+           break;
+       case 'v':
+           version();
+           exit(EXIT_SUCCESS);
+           break;
+#endif
+#ifdef UTF8_OUTPUT_ENABLE
+       case 'w':           /* UTF-8 output */
+           if (cp[0] == '8') {
+               cp++;
+               if (cp[0] == '0'){
+                   cp++;
+                   output_encoding = nkf_enc_from_index(UTF_8N);
+               } else {
+                   output_bom_f = TRUE;
+                   output_encoding = nkf_enc_from_index(UTF_8_BOM);
+               }
+           } else {
+               int enc_idx;
+               if ('1'== cp[0] && '6'==cp[1]) {
+                   cp += 2;
+                   enc_idx = UTF_16;
+               } else if ('3'== cp[0] && '2'==cp[1]) {
+                   cp += 2;
+                   enc_idx = UTF_32;
+               } else {
+                   output_encoding = nkf_enc_from_index(UTF_8);
+                   continue;
+               }
+               if (cp[0]=='L') {
+                   cp++;
+                   output_endian = ENDIAN_LITTLE;
+               } else if (cp[0] == 'B') {
+                   cp++;
+               }
+               if (cp[0] == '0'){
+                   cp++;
+                   enc_idx = enc_idx == UTF_16
+                       ? (output_endian == ENDIAN_LITTLE ? UTF_16LE : UTF_16BE)
+                       : (output_endian == ENDIAN_LITTLE ? UTF_32LE : UTF_32BE);
+               } else {
+                   output_bom_f = TRUE;
+                   enc_idx = enc_idx == UTF_16
+                       ? (output_endian == ENDIAN_LITTLE ? UTF_16LE_BOM : UTF_16BE_BOM)
+                       : (output_endian == ENDIAN_LITTLE ? UTF_32LE_BOM : UTF_32BE_BOM);
+               }
+               output_encoding = nkf_enc_from_index(enc_idx);
+           }
+           continue;
+#endif
+#ifdef UTF8_INPUT_ENABLE
+       case 'W':           /* UTF input */
+           if (cp[0] == '8') {
+               cp++;
+               input_encoding = nkf_enc_from_index(UTF_8);
+           }else{
+               int enc_idx;
+               if ('1'== cp[0] && '6'==cp[1]) {
+                   cp += 2;
+                   input_endian = ENDIAN_BIG;
+                   enc_idx = UTF_16;
+               } else if ('3'== cp[0] && '2'==cp[1]) {
+                   cp += 2;
+                   input_endian = ENDIAN_BIG;
+                   enc_idx = UTF_32;
+               } else {
+                   input_encoding = nkf_enc_from_index(UTF_8);
+                   continue;
+               }
+               if (cp[0]=='L') {
+                   cp++;
+                   input_endian = ENDIAN_LITTLE;
+               } else if (cp[0] == 'B') {
+                   cp++;
+                   input_endian = ENDIAN_BIG;
+               }
+               enc_idx = (enc_idx == UTF_16
+                   ? (input_endian == ENDIAN_LITTLE ? UTF_16LE : UTF_16BE)
+                   : (input_endian == ENDIAN_LITTLE ? UTF_32LE : UTF_32BE));
+               input_encoding = nkf_enc_from_index(enc_idx);
+           }
+           continue;
+#endif
+           /* Input code assumption */
+       case 'J':   /* ISO-2022-JP input */
+           input_encoding = nkf_enc_from_index(ISO_2022_JP);
+           continue;
+       case 'E':   /* EUC-JP input */
+           input_encoding = nkf_enc_from_index(EUCJP_NKF);
+           continue;
+       case 'S':   /* Shift_JIS input */
+           input_encoding = nkf_enc_from_index(SHIFT_JIS);
+           continue;
+       case 'Z':   /* Convert X0208 alphabet to asii */
+           /* alpha_f
+              bit:0   Convert JIS X 0208 Alphabet to ASCII
+              bit:1   Convert Kankaku to one space
+              bit:2   Convert Kankaku to two spaces
+              bit:3   Convert HTML Entity
+              bit:4   Convert JIS X 0208 Katakana to JIS X 0201 Katakana
+            */
+           while ('0'<= *cp && *cp <='4') {
+               alpha_f |= 1 << (*cp++ - '0');
+           }
+           alpha_f |= 1;
+           continue;
+       case 'x':   /* Convert X0201 kana to X0208 or X0201 Conversion */
+           x0201_f = FALSE;    /* No X0201->X0208 conversion */
+           /* accept  X0201
+              ESC-(-I     in JIS, EUC, MS Kanji
+              SI/SO       in JIS, EUC, MS Kanji
+              SS2         in EUC, JIS, not in MS Kanji
+              MS Kanji (0xa0-0xdf)
+              output  X0201
+              ESC-(-I     in JIS (0x20-0x5f)
+              SS2         in EUC (0xa0-0xdf)
+              0xa0-0xd    in MS Kanji (0xa0-0xdf)
+            */
+           continue;
+       case 'X':   /* Convert X0201 kana to X0208 */
+           x0201_f = TRUE;
+           continue;
+       case 'F':   /* prserve new lines */
+           fold_preserve_f = TRUE;
+       case 'f':   /* folding -f60 or -f */
+           fold_f = TRUE;
+           fold_len = 0;
+           while('0'<= *cp && *cp <='9') { /* we don't use atoi here */
+               fold_len *= 10;
+               fold_len += *cp++ - '0';
+           }
+           if (!(0<fold_len && fold_len<BUFSIZ))
+               fold_len = DEFAULT_FOLD;
+           if (*cp=='-') {
+               fold_margin = 0;
+               cp++;
+               while('0'<= *cp && *cp <='9') { /* we don't use atoi here */
+                   fold_margin *= 10;
+                   fold_margin += *cp++ - '0';
+               }
+           }
+           continue;
+       case 'm':   /* MIME support */
+           /* mime_decode_f = TRUE; */ /* this has too large side effects... */
+           if (*cp=='B'||*cp=='Q') {
+               mime_decode_mode = *cp++;
+               mimebuf_f = FIXED_MIME;
+           } else if (*cp=='N') {
+               mime_f = TRUE; cp++;
+           } else if (*cp=='S') {
+               mime_f = STRICT_MIME; cp++;
+           } else if (*cp=='0') {
+               mime_decode_f = FALSE;
+               mime_f = FALSE; cp++;
+           } else {
+               mime_f = STRICT_MIME;
+           }
+           continue;
+       case 'M':   /* MIME output */
+           if (*cp=='B') {
+               mimeout_mode = 'B';
+               mimeout_f = FIXED_MIME; cp++;
+           } else if (*cp=='Q') {
+               mimeout_mode = 'Q';
+               mimeout_f = FIXED_MIME; cp++;
+           } else {
+               mimeout_f = TRUE;
+           }
+           continue;
+       case 'B':   /* Broken JIS support */
+           /*  bit:0   no ESC JIS
+              bit:1   allow any x on ESC-(-x or ESC-$-x
+              bit:2   reset to ascii on NL
+            */
+           if ('9'>= *cp && *cp>='0')
+               broken_f |= 1<<(*cp++ -'0');
+           else
+               broken_f |= TRUE;
+           continue;
+#ifndef PERL_XS
+       case 'O':/* for Output file */
+           file_out_f = TRUE;
+           continue;
+#endif
+       case 'c':/* add cr code */
+           eolmode_f = CRLF;
+           continue;
+       case 'd':/* delete cr code */
+           eolmode_f = LF;
+           continue;
+       case 'I':   /* ISO-2022-JP output */
+           iso2022jp_f = TRUE;
+           continue;
+       case 'L':  /* line mode */
+           if (*cp=='u') {         /* unix */
+               eolmode_f = LF; cp++;
+           } else if (*cp=='m') { /* mac */
+               eolmode_f = CR; cp++;
+           } else if (*cp=='w') { /* windows */
+               eolmode_f = CRLF; cp++;
+           } else if (*cp=='0') { /* no conversion  */
+               eolmode_f = 0; cp++;
            }
-           open_mime(output_mode);
+           continue;
+#ifndef PERL_XS
+       case 'g':
+           if ('2' <= *cp && *cp <= '9') {
+               guess_f = 2;
+               cp++;
+           } else if (*cp == '0' || *cp == '1') {
+               guess_f = 1;
+               cp++;
+           } else {
+               guess_f = 1;
+           }
+           continue;
+#endif
+       case SP:
+           /* module muliple options in a string are allowed for Perl moudle  */
+           while(*cp && *cp++!='-');
+           continue;
+       default:
+#if !defined(PERL_XS) && !defined(WIN32DLL)
+           fprintf(stderr, "unknown option: -%c\n", *(cp-1));
+#endif
+           /* bogus option but ignored */
+           return -1;
        }
     }
-    mimeout_addchar(c);
+    return 0;
 }
 
-
-void reinit(void)
+#ifdef WIN32DLL
+#include "nkf32dll.c"
+#elif defined(PERL_XS)
+#else /* WIN32DLL */
+int
+main(int argc, char **argv)
 {
-    {
-        struct input_code *p = input_code_list;
-        while (p->name){
-            status_reinit(p++);
-        }
-    }
-    unbuf_f = FALSE;
-    estab_f = FALSE;
-    nop_f = FALSE;
-    binmode_f = TRUE;
-    rot_f = FALSE;
-    hira_f = FALSE;
-    input_f = FALSE;
-    alpha_f = FALSE;
-    mime_f = STRICT_MIME;
-    mime_decode_f = FALSE;
-    mimebuf_f = FALSE;
-    broken_f = FALSE;
-    iso8859_f = FALSE;
-    mimeout_f = FALSE;
-#if defined(MSDOS) || defined(__OS2__)
-     x0201_f = TRUE;
-#else
-     x0201_f = NO_X0201;
-#endif
-    iso2022jp_f = FALSE;
-#if defined(UTF8_INPUT_ENABLE) || defined(UTF8_OUTPUT_ENABLE)
-    ms_ucs_map_f = UCS_MAP_ASCII;
-#endif
-#ifdef UTF8_INPUT_ENABLE
-    no_cp932ext_f = FALSE;
-    no_best_fit_chars_f = FALSE;
-    encode_fallback = NULL;
-    unicode_subchar  = '?';
-    input_endian = ENDIAN_BIG;
-#endif
-#ifdef UTF8_OUTPUT_ENABLE
-    output_bom_f = FALSE;
-    output_endian = ENDIAN_BIG;
+    FILE  *fin;
+    unsigned char  *cp;
+
+    char *outfname = NULL;
+    char *origfname;
+
+#ifdef EASYWIN /*Easy Win */
+    _BufferSize.y = 400;/*Set Scroll Buffer Size*/
 #endif
-#ifdef UNICODE_NORMALIZATION
-    nfc_f = FALSE;
+#ifdef DEFAULT_CODE_LOCALE
+    setlocale(LC_CTYPE, "");
 #endif
-#ifdef INPUT_OPTION
-    cap_f = FALSE;
-    url_f = FALSE;
-    numchar_f = FALSE;
+    nkf_state_init();
+
+    for (argc--,argv++; (argc > 0) && **argv == '-'; argc--, argv++) {
+       cp = (unsigned char *)*argv;
+       options(cp);
+#ifdef EXEC_IO
+       if (exec_f){
+           int fds[2], pid;
+           if (pipe(fds) < 0 || (pid = fork()) < 0){
+               abort();
+           }
+           if (pid == 0){
+               if (exec_f > 0){
+                   close(fds[0]);
+                   dup2(fds[1], 1);
+               }else{
+                   close(fds[1]);
+                   dup2(fds[0], 0);
+               }
+               execvp(argv[1], &argv[1]);
+           }
+           if (exec_f > 0){
+               close(fds[1]);
+               dup2(fds[0], 0);
+           }else{
+               close(fds[0]);
+               dup2(fds[1], 1);
+           }
+           argc = 0;
+           break;
+       }
 #endif
+    }
+
+    if (guess_f) {
 #ifdef CHECK_OPTION
-    noout_f = FALSE;
-    debug_f = FALSE;
+       int debug_f_back = debug_f;
 #endif
-    guess_f = 0;
 #ifdef EXEC_IO
-    exec_f = 0;
-#endif
-#ifdef SHIFTJIS_CP932
-    cp51932_f = TRUE;
-    cp932inv_f = TRUE;
+       int exec_f_back = exec_f;
 #endif
 #ifdef X0212_ENABLE
-    x0212_f = FALSE;
-    x0213_f = FALSE;
+       int x0212_f_back = x0212_f;
 #endif
-    {
-        int i;
-        for (i = 0; i < 256; i++){
-            prefix_table[i] = 0;
-        }
-    }
-    hold_count = 0;
-    mimeout_buf_count = 0;
-    mimeout_mode = 0;
-    base64_count = 0;
-    f_line = 0;
-    f_prev = 0;
-    fold_preserve_f = FALSE;
-    fold_f = FALSE;
-    fold_len = 0;
-    kanji_intro = DEFAULT_J;
-    ascii_intro = DEFAULT_R;
-    fold_margin  = FOLD_MARGIN;
-    output_conv = DEFAULT_CONV;
-    oconv = DEFAULT_CONV;
-    o_zconv = no_connection;
-    o_fconv = no_connection;
-    o_nlconv = no_connection;
-    o_rot_conv = no_connection;
-    o_hira_conv = no_connection;
-    o_base64conv = no_connection;
-    o_iso2022jp_check_conv = no_connection;
-    o_putc = std_putc;
-    i_getc = std_getc;
-    i_ungetc = std_ungetc;
-    i_bgetc = std_getc;
-    i_bungetc = std_ungetc;
-    o_mputc = std_putc;
-    i_mgetc = std_getc;
-    i_mungetc  = std_ungetc;
-    i_mgetc_buf = std_getc;
-    i_mungetc_buf = std_ungetc;
-    output_mode = ASCII;
-    input_mode =  ASCII;
-    shift_mode =  FALSE;
-    mime_decode_mode = FALSE;
-    file_out_f = FALSE;
-    nlmode_f = 0;
-    input_nextline = 0;
-    prev_cr = 0;
-    option_mode = 0;
-    broken_counter = 0;
-    broken_last = 0;
-    z_prev2=0,z_prev1=0;
+       int x0213_f_back = x0213_f;
+       int guess_f_back = guess_f;
+       reinit();
+       guess_f = guess_f_back;
+       mime_f = FALSE;
 #ifdef CHECK_OPTION
-    iconv_for_check = 0;
+       debug_f = debug_f_back;
 #endif
-    input_codename = NULL;
-#ifdef WIN32DLL
-    reinitdll();
-#endif /*WIN32DLL*/
-}
+#ifdef EXEC_IO
+       exec_f = exec_f_back;
+#endif
+       x0212_f = x0212_f_back;
+       x0213_f = x0213_f_back;
+    }
 
-void no_connection(nkf_char c2, nkf_char c1)
-{
-    no_connection2(c2,c1,0);
-}
+    if (binmode_f == TRUE)
+#if defined(__OS2__) && (defined(__IBMC__) || defined(__IBMCPP__))
+       if (freopen("","wb",stdout) == NULL)
+           return (-1);
+#else
+    setbinmode(stdout);
+#endif
 
-nkf_char no_connection2(nkf_char c2, nkf_char c1, nkf_char c0)
-{
-    fprintf(stderr,"nkf internal module connection failure.\n");
-    exit(1);
-    return 0; /* LINT */
-}
+    if (unbuf_f)
+       setbuf(stdout, (char *) NULL);
+    else
+       setvbuffer(stdout, (char *) stdobuf, IOBUF_SIZE);
 
-#ifndef PERL_XS
-#ifdef WIN32DLL
-#define fprintf dllprintf
-#endif
-void usage(void)
-{
-    fprintf(stderr,"USAGE:  nkf(nkf32,wnkf,nkf2) -[flags] [in file] .. [out file for -O flag]\n");
-    fprintf(stderr,"Flags:\n");
-    fprintf(stderr,"b,u      Output is buffered (DEFAULT),Output is unbuffered\n");
-#ifdef DEFAULT_CODE_SJIS
-    fprintf(stderr,"j,s,e,w  Output code is JIS 7 bit, Shift_JIS (DEFAULT), EUC-JP, UTF-8N\n");
-#endif
-#ifdef DEFAULT_CODE_JIS
-    fprintf(stderr,"j,s,e,w  Output code is JIS 7 bit (DEFAULT), Shift JIS, EUC-JP, UTF-8N\n");
-#endif
-#ifdef DEFAULT_CODE_EUC
-    fprintf(stderr,"j,s,e,w  Output code is JIS 7 bit, Shift JIS, EUC-JP (DEFAULT), UTF-8N\n");
+    if (argc == 0) {
+       if (binmode_f == TRUE)
+#if defined(__OS2__) && (defined(__IBMC__) || defined(__IBMCPP__))
+           if (freopen("","rb",stdin) == NULL) return (-1);
+#else
+       setbinmode(stdin);
 #endif
-#ifdef DEFAULT_CODE_UTF8
-    fprintf(stderr,"j,s,e,w  Output code is JIS 7 bit, Shift JIS, EUC-JP, UTF-8N (DEFAULT)\n");
+       setvbuffer(stdin, (char *) stdibuf, IOBUF_SIZE);
+       if (nop_f)
+           noconvert(stdin);
+       else {
+           kanji_convert(stdin);
+           if (guess_f) print_guessed_code(NULL);
+       }
+    } else {
+       int nfiles = argc;
+       int is_argument_error = FALSE;
+       while (argc--) {
+           input_codename = NULL;
+           input_eol = 0;
+#ifdef CHECK_OPTION
+           iconv_for_check = 0;
 #endif
-#ifdef UTF8_OUTPUT_ENABLE
-    fprintf(stderr,"         After 'w' you can add more options. -w[ 8 [0], 16 [[BL] [0]] ]\n");
+           if ((fin = fopen((origfname = *argv++), "r")) == NULL) {
+               perror(*(argv-1));
+               is_argument_error = TRUE;
+               continue;
+           } else {
+#ifdef OVERWRITE
+               int fd = 0;
+               int fd_backup = 0;
 #endif
-    fprintf(stderr,"J,S,E,W  Input assumption is JIS 7 bit , Shift JIS, EUC-JP, UTF-8\n");
-#ifdef UTF8_INPUT_ENABLE
-    fprintf(stderr,"         After 'W' you can add more options. -W[ 8, 16 [BL] ] \n");
-#endif
-    fprintf(stderr,"t        no conversion\n");
-    fprintf(stderr,"i[@B]    Specify the Esc Seq for JIS X 0208-1978/83 (DEFAULT B)\n");
-    fprintf(stderr,"o[BJH]   Specify the Esc Seq for ASCII/Roman        (DEFAULT B)\n");
-    fprintf(stderr,"r        {de/en}crypt ROT13/47\n");
-    fprintf(stderr,"h        1 katakana->hiragana, 2 hiragana->katakana, 3 both\n");
-    fprintf(stderr,"v        Show this usage. V: show version\n");
-    fprintf(stderr,"m[BQN0]  MIME decode [B:base64,Q:quoted,N:non-strict,0:no decode]\n");
-    fprintf(stderr,"M[BQ]    MIME encode [B:base64 Q:quoted]\n");
-    fprintf(stderr,"l        ISO8859-1 (Latin-1) support\n");
-    fprintf(stderr,"f/F      Folding: -f60 or -f or -f60-10 (fold margin 10) F preserve nl\n");
-    fprintf(stderr,"Z[0-4]   Default/0: Convert JISX0208 Alphabet to ASCII\n");
-    fprintf(stderr,"         1: Kankaku to one space  2: to two spaces  3: HTML Entity\n");
-    fprintf(stderr,"         4: JISX0208 Katakana to JISX0201 Katakana\n");
-    fprintf(stderr,"X,x      Assume X0201 kana in MS-Kanji, -x preserves X0201\n");
-    fprintf(stderr,"B[0-2]   Broken input  0: missing ESC,1: any X on ESC-[($]-X,2: ASCII on NL\n");
+
+               /* reopen file for stdout */
+               if (file_out_f == TRUE) {
+#ifdef OVERWRITE
+                   if (overwrite_f){
+                       outfname = nkf_xmalloc(strlen(origfname)
+                                         + strlen(".nkftmpXXXXXX")
+                                         + 1);
+                       strcpy(outfname, origfname);
 #ifdef MSDOS
-    fprintf(stderr,"T        Text mode output\n");
-#endif
-    fprintf(stderr,"O        Output to File (DEFAULT 'nkf.out')\n");
-    fprintf(stderr,"I        Convert non ISO-2022-JP charactor to GETA\n");
-    fprintf(stderr,"d,c      Convert line breaks  -d: LF  -c: CRLF\n");
-    fprintf(stderr,"-L[uwm]  line mode u:LF w:CRLF m:CR (DEFAULT noconversion)\n");
-    fprintf(stderr,"\n");
-    fprintf(stderr,"Long name options\n");
-    fprintf(stderr," --ic=<input codeset>  --oc=<output codeset>\n");
-    fprintf(stderr,"                   Specify the input or output codeset\n");
-    fprintf(stderr," --fj  --unix --mac  --windows\n");
-    fprintf(stderr," --jis  --euc  --sjis  --utf8  --utf16  --mime  --base64\n");
-    fprintf(stderr,"                   Convert for the system or code\n");
-    fprintf(stderr," --hiragana  --katakana  --katakana-hiragana\n");
-    fprintf(stderr,"                   To Hiragana/Katakana Conversion\n");
-    fprintf(stderr," --prefix=         Insert escape before troublesome characters of Shift_JIS\n");
-#ifdef INPUT_OPTION
-    fprintf(stderr," --cap-input, --url-input  Convert hex after ':' or '%%'\n");
+                       {
+                           int i;
+                           for (i = strlen(outfname); i; --i){
+                               if (outfname[i - 1] == '/'
+                                   || outfname[i - 1] == '\\'){
+                                   break;
+                               }
+                           }
+                           outfname[i] = '\0';
+                       }
+                       strcat(outfname, "ntXXXXXX");
+                       mktemp(outfname);
+                       fd = open(outfname, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL,
+                                 S_IREAD | S_IWRITE);
+#else
+                       strcat(outfname, ".nkftmpXXXXXX");
+                       fd = mkstemp(outfname);
 #endif
-#ifdef NUMCHAR_OPTION
-    fprintf(stderr," --numchar-input   Convert Unicode Character Reference\n");
+                       if (fd < 0
+                           || (fd_backup = dup(fileno(stdout))) < 0
+                           || dup2(fd, fileno(stdout)) < 0
+                          ){
+                           perror(origfname);
+                           return -1;
+                       }
+                   }else
 #endif
-#ifdef UTF8_INPUT_ENABLE
-    fprintf(stderr," --fb-{skip, html, xml, perl, java, subchar}\n");
-    fprintf(stderr,"                   Specify how nkf handles unassigned characters\n");
+                   if(argc == 1) {
+                       outfname = *argv++;
+                       argc--;
+                   } else {
+                       outfname = "nkf.out";
+                   }
+
+                   if(freopen(outfname, "w", stdout) == NULL) {
+                       perror (outfname);
+                       return (-1);
+                   }
+                   if (binmode_f == TRUE) {
+#if defined(__OS2__) && (defined(__IBMC__) || defined(__IBMCPP__))
+                       if (freopen("","wb",stdout) == NULL)
+                           return (-1);
+#else
+                       setbinmode(stdout);
 #endif
+                   }
+               }
+               if (binmode_f == TRUE)
+#if defined(__OS2__) && (defined(__IBMC__) || defined(__IBMCPP__))
+                   if (freopen("","rb",fin) == NULL)
+                       return (-1);
+#else
+               setbinmode(fin);
+#endif
+               setvbuffer(fin, (char *) stdibuf, IOBUF_SIZE);
+               if (nop_f)
+                   noconvert(fin);
+               else {
+                   char *filename = NULL;
+                   kanji_convert(fin);
+                   if (nfiles > 1) filename = origfname;
+                   if (guess_f) print_guessed_code(filename);
+               }
+               fclose(fin);
 #ifdef OVERWRITE
-    fprintf(stderr," --in-place[=SUFFIX]  --overwrite[=SUFFIX]\n");
-    fprintf(stderr,"                   Overwrite original listed files by filtered result\n");
-    fprintf(stderr,"                   --overwrite preserves timestamp of original files\n");
-#endif
-    fprintf(stderr," -g  --guess       Guess the input code\n");
-    fprintf(stderr," --help  --version Show this help/the version\n");
-    fprintf(stderr,"                   For more information, see also man nkf\n");
-    fprintf(stderr,"\n");
-    version();
-}
+               if (overwrite_f) {
+                   struct stat     sb;
+#if defined(MSDOS) && !defined(__MINGW32__) && !defined(__WIN32__) && !defined(__WATCOMC__) && !defined(__EMX__) && !defined(__OS2__) && !defined(__DJGPP__)
+                   time_t tb[2];
+#else
+                   struct utimbuf  tb;
+#endif
 
-void version(void)
-{
-    fprintf(stderr,"Network Kanji Filter Version %s (%s) "
-#if defined(MSDOS) && !defined(__WIN32__) && !defined(__WIN16__) && !defined(__OS2__)
-                  "for DOS"
+                   fflush(stdout);
+                   close(fd);
+                   if (dup2(fd_backup, fileno(stdout)) < 0){
+                       perror("dup2");
+                   }
+                   if (stat(origfname, &sb)) {
+                       fprintf(stderr, "Can't stat %s\n", origfname);
+                   }
+                   /* \e$B%Q!<%_%C%7%g%s$rI|85\e(B */
+                   if (chmod(outfname, sb.st_mode)) {
+                       fprintf(stderr, "Can't set permission %s\n", outfname);
+                   }
+
+                   /* \e$B%?%$%`%9%?%s%W$rI|85\e(B */
+                   if(preserve_time_f){
+#if defined(MSDOS) && !defined(__MINGW32__) && !defined(__WIN32__) && !defined(__WATCOMC__) && !defined(__EMX__) && !defined(__OS2__) && !defined(__DJGPP__)
+                       tb[0] = tb[1] = sb.st_mtime;
+                       if (utime(outfname, tb)) {
+                           fprintf(stderr, "Can't set timestamp %s\n", outfname);
+                       }
+#else
+                       tb.actime  = sb.st_atime;
+                       tb.modtime = sb.st_mtime;
+                       if (utime(outfname, &tb)) {
+                           fprintf(stderr, "Can't set timestamp %s\n", outfname);
+                       }
 #endif
-#if defined(MSDOS) && defined(__WIN16__)
-                  "for Win16"
+                   }
+                   if(backup_f){
+                       char *backup_filename = get_backup_filename(backup_suffix, origfname);
+#ifdef MSDOS
+                       unlink(backup_filename);
 #endif
-#if defined(MSDOS) && defined(__WIN32__)
-                  "for Win32"
+                       if (rename(origfname, backup_filename)) {
+                           perror(backup_filename);
+                           fprintf(stderr, "Can't rename %s to %s\n",
+                                   origfname, backup_filename);
+                       }
+                       nkf_xfree(backup_filename);
+                   }else{
+#ifdef MSDOS
+                       if (unlink(origfname)){
+                           perror(origfname);
+                       }
 #endif
-#ifdef __OS2__
-                  "for OS/2"
+                   }
+                   if (rename(outfname, origfname)) {
+                       perror(origfname);
+                       fprintf(stderr, "Can't rename %s to %s\n",
+                               outfname, origfname);
+                   }
+                   nkf_xfree(outfname);
+               }
 #endif
-                  ,NKF_VERSION,NKF_RELEASE_DATE);
-    fprintf(stderr,"\n%s\n",CopyRight);
+           }
+       }
+       if (is_argument_error)
+           return(-1);
+    }
+#ifdef EASYWIN /*Easy Win */
+    if (file_out_f == FALSE)
+       scanf("%d",&end_check);
+    else
+       fclose(stdout);
+#else /* for Other OS */
+    if (file_out_f == TRUE)
+       fclose(stdout);
+#endif /*Easy Win */
+    return (0);
 }
-#endif /*PERL_XS*/
+#endif /* WIN32DLL */