/* String intrinsics helper functions.
- Copyright 2002, 2005, 2007 Free Software Foundation, Inc.
- Contributed by Paul Brook <paul@nowt.org>
+ Copyright 2008 Free Software Foundation, Inc.
-This file is part of the GNU Fortran 95 runtime library (libgfortran).
+This file is part of the GNU Fortran runtime library (libgfortran).
Libgfortran is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
compiler translates the actual intrinsics calls to calls to
functions in this file. */
-#include <stdlib.h>
-#include <string.h>
-#include <stdarg.h>
-
#include "libgfortran.h"
-
-/* String functions. */
-
-extern void concat_string (GFC_INTEGER_4, char *,
- GFC_INTEGER_4, const char *,
- GFC_INTEGER_4, const char *);
-export_proto(concat_string);
-
-extern GFC_INTEGER_4 string_len_trim (GFC_INTEGER_4, const char *);
-export_proto(string_len_trim);
-
-extern void adjustl (char *, GFC_INTEGER_4, const char *);
-export_proto(adjustl);
-
-extern void adjustr (char *, GFC_INTEGER_4, const char *);
-export_proto(adjustr);
-
-extern GFC_INTEGER_4 string_index (GFC_INTEGER_4, const char *, GFC_INTEGER_4,
- const char *, GFC_LOGICAL_4);
-export_proto(string_index);
-
-extern GFC_INTEGER_4 string_scan (GFC_INTEGER_4, const char *, GFC_INTEGER_4,
- const char *, GFC_LOGICAL_4);
-export_proto(string_scan);
-
-extern GFC_INTEGER_4 string_verify (GFC_INTEGER_4, const char *, GFC_INTEGER_4,
- const char *, GFC_LOGICAL_4);
-export_proto(string_verify);
-
-extern void string_trim (GFC_INTEGER_4 *, void **, GFC_INTEGER_4, const char *);
-export_proto(string_trim);
-
-extern void string_minmax (GFC_INTEGER_4 *, void **, int, int, ...);
-export_proto(string_minmax);
-
-/* Strings of unequal length are extended with pad characters. */
-
-int
-compare_string (GFC_INTEGER_4 len1, const char * s1,
- GFC_INTEGER_4 len2, const char * s2)
-{
- int res;
- const unsigned char *s;
- int len;
-
- res = memcmp (s1, s2, (len1 < len2) ? len1 : len2);
- if (res != 0)
- return res;
-
- if (len1 == len2)
- return 0;
-
- if (len1 < len2)
- {
- len = len2 - len1;
- s = (unsigned char *) &s2[len1];
- res = -1;
- }
- else
- {
- len = len1 - len2;
- s = (unsigned char *) &s1[len2];
- res = 1;
- }
-
- while (len--)
- {
- if (*s != ' ')
- {
- if (*s > ' ')
- return res;
- else
- return -res;
- }
- s++;
- }
-
- return 0;
-}
-iexport(compare_string);
-
-
-/* The destination and source should not overlap. */
-
-void
-concat_string (GFC_INTEGER_4 destlen, char * dest,
- GFC_INTEGER_4 len1, const char * s1,
- GFC_INTEGER_4 len2, const char * s2)
-{
- if (len1 >= destlen)
- {
- memcpy (dest, s1, destlen);
- return;
- }
- memcpy (dest, s1, len1);
- dest += len1;
- destlen -= len1;
-
- if (len2 >= destlen)
- {
- memcpy (dest, s2, destlen);
- return;
- }
-
- memcpy (dest, s2, len2);
- memset (&dest[len2], ' ', destlen - len2);
-}
-
-
-/* Return string with all trailing blanks removed. */
-
-void
-string_trim (GFC_INTEGER_4 * len, void ** dest, GFC_INTEGER_4 slen,
- const char * src)
-{
- int i;
-
- /* Determine length of result string. */
- for (i = slen - 1; i >= 0; i--)
- {
- if (src[i] != ' ')
- break;
- }
- *len = i + 1;
-
- if (*len > 0)
- {
- /* Allocate space for result string. */
- *dest = internal_malloc_size (*len);
-
- /* copy string if necessary. */
- memmove (*dest, src, *len);
- }
- else
- *dest = NULL;
-}
-
-
-/* The length of a string not including trailing blanks. */
-
-GFC_INTEGER_4
-string_len_trim (GFC_INTEGER_4 len, const char * s)
-{
- int i;
-
- for (i = len - 1; i >= 0; i--)
- {
- if (s[i] != ' ')
- break;
- }
- return i + 1;
-}
-
-
-/* Find a substring within a string. */
-
-GFC_INTEGER_4
-string_index (GFC_INTEGER_4 slen, const char * str, GFC_INTEGER_4 sslen,
- const char * sstr, GFC_LOGICAL_4 back)
-{
- int start;
- int last;
- int i;
- int delta;
-
- if (sslen == 0)
- return 1;
-
- if (sslen > slen)
- return 0;
-
- if (!back)
- {
- last = slen + 1 - sslen;
- start = 0;
- delta = 1;
- }
- else
- {
- last = -1;
- start = slen - sslen;
- delta = -1;
- }
- i = 0;
- for (; start != last; start+= delta)
- {
- for (i = 0; i < sslen; i++)
- {
- if (str[start + i] != sstr[i])
- break;
- }
- if (i == sslen)
- return (start + 1);
- }
- return 0;
-}
-
-
-/* Remove leading blanks from a string, padding at end. The src and dest
- should not overlap. */
-
-void
-adjustl (char *dest, GFC_INTEGER_4 len, const char *src)
-{
- int i;
-
- i = 0;
- while (i<len && src[i] == ' ')
- i++;
-
- if (i < len)
- memcpy (dest, &src[i], len - i);
- if (i > 0)
- memset (&dest[len - i], ' ', i);
-}
-
-
-/* Remove trailing blanks from a string. */
-
-void
-adjustr (char *dest, GFC_INTEGER_4 len, const char *src)
-{
- int i;
-
- i = len;
- while (i > 0 && src[i - 1] == ' ')
- i--;
-
- if (i < len)
- memset (dest, ' ', len - i);
- memcpy (dest + (len - i), src, i );
-}
-
-
-/* Scan a string for any one of the characters in a set of characters. */
-
-GFC_INTEGER_4
-string_scan (GFC_INTEGER_4 slen, const char * str, GFC_INTEGER_4 setlen,
- const char * set, GFC_LOGICAL_4 back)
-{
- int i, j;
-
- if (slen == 0 || setlen == 0)
- return 0;
-
- if (back)
- {
- for (i = slen - 1; i >= 0; i--)
- {
- for (j = 0; j < setlen; j++)
- {
- if (str[i] == set[j])
- return (i + 1);
- }
- }
- }
- else
- {
- for (i = 0; i < slen; i++)
- {
- for (j = 0; j < setlen; j++)
- {
- if (str[i] == set[j])
- return (i + 1);
- }
- }
- }
-
- return 0;
-}
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
-/* Verify that a set of characters contains all the characters in a
- string by identifying the position of the first character in a
- characters that does not appear in a given set of characters. */
+/* Helper function to set parts of wide strings to a constant (usually
+ spaces). */
-GFC_INTEGER_4
-string_verify (GFC_INTEGER_4 slen, const char * str, GFC_INTEGER_4 setlen,
- const char * set, GFC_LOGICAL_4 back)
+static gfc_char4_t *
+memset_char4 (gfc_char4_t *b, gfc_char4_t c, size_t len)
{
- int start;
- int last;
- int i;
- int delta;
+ size_t i;
- if (slen == 0)
- return 0;
+ for (i = 0; i < len; i++)
+ b[i] = c;
- if (back)
- {
- last = -1;
- start = slen - 1;
- delta = -1;
- }
- else
- {
- last = slen;
- start = 0;
- delta = 1;
- }
- for (; start != last; start += delta)
- {
- for (i = 0; i < setlen; i++)
- {
- if (str[start] == set[i])
- break;
- }
- if (i == setlen)
- return (start + 1);
- }
-
- return 0;
+ return b;
}
-/* MIN and MAX intrinsics for strings. The front-end makes sure that
- nargs is at least 2. */
-
-void
-string_minmax (GFC_INTEGER_4 *rlen, void **dest, int op, int nargs, ...)
-{
- va_list ap;
- int i;
- char * next, * res;
- GFC_INTEGER_4 nextlen, reslen;
-
- va_start (ap, nargs);
- reslen = va_arg (ap, GFC_INTEGER_4);
- res = va_arg (ap, char *);
- *rlen = reslen;
-
- if (res == NULL)
- runtime_error ("First argument of '%s' intrinsic should be present",
- op > 0 ? "MAX" : "MIN");
+/* All other functions are defined using a few generic macros in
+ string_intrinsics_inc.c, so we avoid code duplication between the
+ various character type kinds. */
- for (i = 1; i < nargs; i++)
- {
- nextlen = va_arg (ap, GFC_INTEGER_4);
- next = va_arg (ap, char *);
+#undef CHARTYPE
+#define CHARTYPE char
+#undef UCHARTYPE
+#define UCHARTYPE unsigned char
+#undef SUFFIX
+#define SUFFIX(x) x
+#undef MEMSET
+#define MEMSET memset
+#include "string_intrinsics_inc.c"
- if (next == NULL)
- {
- if (i == 1)
- runtime_error ("Second argument of '%s' intrinsic should be "
- "present", op > 0 ? "MAX" : "MIN");
- else
- continue;
- }
- if (nextlen > *rlen)
- *rlen = nextlen;
+#undef CHARTYPE
+#define CHARTYPE gfc_char4_t
+#undef UCHARTYPE
+#define UCHARTYPE gfc_char4_t
+#undef SUFFIX
+#define SUFFIX(x) x ## _char4
+#undef MEMSET
+#define MEMSET memset_char4
- if (op * compare_string (reslen, res, nextlen, next) < 0)
- {
- reslen = nextlen;
- res = next;
- }
- }
- va_end (ap);
-
- if (*rlen > 0)
- {
- char * tmp = internal_malloc_size (*rlen);
- memcpy (tmp, res, reslen);
- memset (&tmp[reslen], ' ', *rlen - reslen);
- *dest = tmp;
- }
- else
- *dest = NULL;
-}
+#include "string_intrinsics_inc.c"
OSDN Git Service
