1 /* Language lexer for the GNU compiler for the Java(TM) language.
2 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
3 Contributed by Alexandre Petit-Bianco (apbianco@cygnus.com)
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA.
22 Java and all Java-based marks are trademarks or registered trademarks
23 of Sun Microsystems, Inc. in the United States and other countries.
24 The Free Software Foundation is independent of Sun Microsystems, Inc. */
26 /* It defines java_lex (yylex) that reads a Java ASCII source file
27 possibly containing Unicode escape sequence or utf8 encoded
28 characters and returns a token for everything found but comments,
29 white spaces and line terminators. When necessary, it also fills
30 the java_lval (yylval) union. It's implemented to be called by a
31 re-entrant parser generated by Bison.
33 The lexical analysis conforms to the Java grammar described in "The
34 Java(TM) Language Specification. J. Gosling, B. Joy, G. Steele.
35 Addison Wesley 1996" (http://java.sun.com/docs/books/jls/html/3.doc.html) */
39 #include "chartables.h"
41 /* Function declarations. */
42 static char *java_sprint_unicode PARAMS ((struct java_line *, int));
43 static void java_unicode_2_utf8 PARAMS ((unicode_t));
44 static void java_lex_error PARAMS ((const char *, int));
46 static int java_is_eol PARAMS ((FILE *, int));
47 static tree build_wfl_node PARAMS ((tree));
49 static void java_store_unicode PARAMS ((struct java_line *, unicode_t, int));
50 static int java_parse_escape_sequence PARAMS ((void));
51 static int java_start_char_p PARAMS ((unicode_t));
52 static int java_part_char_p PARAMS ((unicode_t));
53 static int java_parse_doc_section PARAMS ((int));
54 static void java_parse_end_comment PARAMS ((int));
55 static int java_get_unicode PARAMS ((void));
56 static int java_read_unicode PARAMS ((java_lexer *, int *));
57 static int java_read_unicode_collapsing_terminators PARAMS ((java_lexer *,
59 static void java_store_unicode PARAMS ((struct java_line *, unicode_t, int));
60 static int java_read_char PARAMS ((java_lexer *));
61 static void java_allocate_new_line PARAMS ((void));
62 static void java_unget_unicode PARAMS ((void));
63 static unicode_t java_sneak_unicode PARAMS ((void));
65 static int utf8_cmp PARAMS ((const unsigned char *, int, const char *));
68 java_lexer *java_new_lexer PARAMS ((FILE *, const char *));
70 static void error_if_numeric_overflow PARAMS ((tree));
74 /* This is nonzero if we have initialized `need_byteswap'. */
75 static int byteswap_init = 0;
77 /* Some versions of iconv() (e.g., glibc 2.1.3) will return UCS-2 in
78 big-endian order -- not native endian order. We handle this by
79 doing a conversion once at startup and seeing what happens. This
80 flag holds the results of this determination. */
81 static int need_byteswap = 0;
85 java_init_lex (finput, encoding)
90 int java_lang_imported = 0;
93 java_lang_id = get_identifier ("java.lang");
94 if (!java_lang_cloneable)
95 java_lang_cloneable = get_identifier ("java.lang.Cloneable");
96 if (!java_io_serializable)
97 java_io_serializable = get_identifier ("java.io.Serializable");
99 inst_id = get_identifier ("inst$");
101 wpv_id = get_identifier ("write_parm_value$");
103 if (!java_lang_imported)
105 tree node = build_tree_list
106 (build_expr_wfl (java_lang_id, NULL, 0, 0), NULL_TREE);
107 read_import_dir (TREE_PURPOSE (node));
108 TREE_CHAIN (node) = ctxp->import_demand_list;
109 ctxp->import_demand_list = node;
110 java_lang_imported = 1;
114 wfl_operator = build_expr_wfl (NULL_TREE, ctxp->filename, 0, 0);
116 label_id = get_identifier ("$L");
118 wfl_append = build_expr_wfl (get_identifier ("append"), NULL, 0, 0);
119 if (!wfl_string_buffer)
121 build_expr_wfl (get_identifier (flag_emit_class_files
122 ? "java.lang.StringBuffer"
123 : "gnu.gcj.runtime.StringBuffer"),
126 wfl_to_string = build_expr_wfl (get_identifier ("toString"), NULL, 0, 0);
128 CPC_INITIALIZER_LIST (ctxp) = CPC_STATIC_INITIALIZER_LIST (ctxp) =
129 CPC_INSTANCE_INITIALIZER_LIST (ctxp) = NULL_TREE;
131 memset ((PTR) ctxp->modifier_ctx, 0, 11*sizeof (ctxp->modifier_ctx[0]));
132 memset ((PTR) current_jcf, 0, sizeof (JCF));
133 ctxp->current_parsed_class = NULL;
134 ctxp->package = NULL_TREE;
137 ctxp->filename = input_filename;
138 ctxp->lineno = lineno = 0;
141 ctxp->java_error_flag = 0;
142 ctxp->lexer = java_new_lexer (finput, encoding);
146 java_sprint_unicode (line, i)
147 struct java_line *line;
150 static char buffer [10];
151 if (line->unicode_escape_p [i] || line->line [i] > 128)
152 sprintf (buffer, "\\u%04x", line->line [i]);
155 buffer [0] = line->line [i];
162 java_sneak_unicode ()
164 return (ctxp->c_line->line [ctxp->c_line->current]);
168 java_unget_unicode ()
170 if (!ctxp->c_line->current)
171 /* Can't unget unicode. */
174 ctxp->c_line->current--;
175 ctxp->c_line->char_col -= JAVA_COLUMN_DELTA (0);
179 java_allocate_new_line ()
181 unicode_t ahead = (ctxp->c_line ? ctxp->c_line->ahead[0] : '\0');
182 char ahead_escape_p = (ctxp->c_line ?
183 ctxp->c_line->unicode_escape_ahead_p : 0);
185 if (ctxp->c_line && !ctxp->c_line->white_space_only)
189 free (ctxp->p_line->unicode_escape_p);
190 free (ctxp->p_line->line);
193 ctxp->p_line = ctxp->c_line;
194 ctxp->c_line = NULL; /* Reallocated. */
199 ctxp->c_line = (struct java_line *)xmalloc (sizeof (struct java_line));
200 ctxp->c_line->max = JAVA_LINE_MAX;
201 ctxp->c_line->line = (unicode_t *)xmalloc
202 (sizeof (unicode_t)*ctxp->c_line->max);
203 ctxp->c_line->unicode_escape_p =
204 (char *)xmalloc (sizeof (char)*ctxp->c_line->max);
205 ctxp->c_line->white_space_only = 0;
208 ctxp->c_line->line [0] = ctxp->c_line->size = 0;
209 ctxp->c_line->char_col = ctxp->c_line->current = 0;
212 ctxp->c_line->line [ctxp->c_line->size] = ahead;
213 ctxp->c_line->unicode_escape_p [ctxp->c_line->size] = ahead_escape_p;
214 ctxp->c_line->size++;
216 ctxp->c_line->ahead [0] = 0;
217 ctxp->c_line->unicode_escape_ahead_p = 0;
218 ctxp->c_line->lineno = ++lineno;
219 ctxp->c_line->white_space_only = 1;
222 /* Create a new lexer object. */
225 java_new_lexer (finput, encoding)
227 const char *encoding;
229 java_lexer *lex = (java_lexer *) xmalloc (sizeof (java_lexer));
232 lex->finput = finput;
234 lex->unget_value = 0;
238 lex->handle = iconv_open ("UCS-2", encoding);
239 if (lex->handle != (iconv_t) -1)
245 lex->read_anything = 0;
246 lex->use_fallback = 0;
248 /* Work around broken iconv() implementations by doing checking at
249 runtime. We assume that if the UTF-8 => UCS-2 encoder is broken,
250 then all UCS-2 encoders will be broken. Perhaps not a valid
258 handle = iconv_open ("UCS-2", "UTF-8");
259 if (handle != (iconv_t) -1)
266 /* This is the UTF-8 encoding of \ufeff. */
273 outp = (char *) &result;
276 r = iconv (handle, (ICONV_CONST char **) &inp, &inc,
278 iconv_close (handle);
279 /* Conversion must be complete for us to use the result. */
280 if (r != (size_t) -1 && inc == 0 && outc == 0)
281 need_byteswap = (result != 0xfeff);
285 lex->byte_swap = need_byteswap;
288 #endif /* HAVE_ICONV */
290 /* If iconv failed, use the internal decoder if the default
291 encoding was requested. This code is used on platforms where
292 iconv exists but is insufficient for our needs. For
293 instance, on Solaris 2.5 iconv cannot handle UTF-8 or UCS-2. */
294 if (strcmp (encoding, DEFAULT_ENCODING))
298 lex->use_fallback = 1;
299 #endif /* HAVE_ICONV */
303 fatal_error ("unknown encoding: `%s'\nThis might mean that your locale's encoding is not supported\nby your system's iconv(3) implementation. If you aren't trying\nto use a particular encoding for your input file, try the\n`--encoding=UTF-8' option", encoding);
309 java_destroy_lexer (lex)
313 if (! lex->use_fallback)
314 iconv_close (lex->handle);
323 if (lex->unget_value)
325 unicode_t r = lex->unget_value;
326 lex->unget_value = 0;
331 if (! lex->use_fallback)
333 size_t ir, inbytesleft, in_save, out_count, out_save;
337 /* If there is data which has already been converted, use it. */
338 if (lex->out_first == -1 || lex->out_first >= lex->out_last)
345 /* See if we need to read more data. If FIRST == 0 then
346 the previous conversion attempt ended in the middle of
347 a character at the end of the buffer. Otherwise we
348 only have to read if the buffer is empty. */
349 if (lex->first == 0 || lex->first >= lex->last)
353 if (lex->first >= lex->last)
358 if (feof (lex->finput))
360 r = fread (&lex->buffer[lex->last], 1,
361 sizeof (lex->buffer) - lex->last,
366 inbytesleft = lex->last - lex->first;
367 out_count = sizeof (lex->out_buffer) - lex->out_last;
369 if (inbytesleft == 0)
371 /* We've tried to read and there is nothing left. */
375 in_save = inbytesleft;
376 out_save = out_count;
377 inp = &lex->buffer[lex->first];
378 outp = &lex->out_buffer[lex->out_last];
379 ir = iconv (lex->handle, (ICONV_CONST char **) &inp,
380 &inbytesleft, &outp, &out_count);
382 /* If we haven't read any bytes, then look to see if we
384 if (! lex->read_anything && out_save - out_count >= 2)
386 unicode_t uc = * (unicode_t *) &lex->out_buffer[0];
392 else if (uc == 0xfffe)
397 lex->read_anything = 1;
403 for (i = 0; i < out_save - out_count; i += 2)
405 char t = lex->out_buffer[lex->out_last + i];
406 lex->out_buffer[lex->out_last + i]
407 = lex->out_buffer[lex->out_last + i + 1];
408 lex->out_buffer[lex->out_last + i + 1] = t;
412 lex->first += in_save - inbytesleft;
413 lex->out_last += out_save - out_count;
415 /* If we converted anything at all, move along. */
416 if (out_count != out_save)
419 if (ir == (size_t) -1)
423 /* This is ok. This means that the end of our buffer
424 is in the middle of a character sequence. We just
425 move the valid part of the buffer to the beginning
427 memmove (&lex->buffer[0], &lex->buffer[lex->first],
428 lex->last - lex->first);
429 lex->last -= lex->first;
434 /* A more serious error. */
435 java_lex_error ("unrecognized character in input stream",
443 if (lex->out_first == -1 || lex->out_first >= lex->out_last)
445 /* Don't have any data. */
450 result = * ((unicode_t *) &lex->out_buffer[lex->out_first]);
455 #endif /* HAVE_ICONV */
458 c = getc (lex->finput);
463 return (unicode_t) c;
466 if ((c & 0xe0) == 0xc0)
468 c1 = getc (lex->finput);
469 if ((c1 & 0xc0) == 0x80)
471 unicode_t r = (unicode_t)(((c & 0x1f) << 6) + (c1 & 0x3f));
472 /* Check for valid 2-byte characters. We explicitly
473 allow \0 because this encoding is common in the
475 if (r == 0 || (r >= 0x80 && r <= 0x7ff))
479 else if ((c & 0xf0) == 0xe0)
481 c1 = getc (lex->finput);
482 if ((c1 & 0xc0) == 0x80)
484 c2 = getc (lex->finput);
485 if ((c2 & 0xc0) == 0x80)
487 unicode_t r = (unicode_t)(((c & 0xf) << 12) +
490 /* Check for valid 3-byte characters.
491 Don't allow surrogate, \ufffe or \uffff. */
492 if (r >= 0x800 && r <= 0xffff
493 && ! (r >= 0xd800 && r <= 0xdfff)
494 && r != 0xfffe && r != 0xffff)
500 /* We simply don't support invalid characters. We also
501 don't support 4-, 5-, or 6-byte UTF-8 sequences, as these
502 cannot be valid Java characters. */
503 java_lex_error ("malformed UTF-8 character", 0);
507 /* We only get here on error. */
512 java_store_unicode (l, c, unicode_escape_p)
515 int unicode_escape_p;
517 if (l->size == l->max)
519 l->max += JAVA_LINE_MAX;
520 l->line = (unicode_t *) xrealloc (l->line, sizeof (unicode_t)*l->max);
521 l->unicode_escape_p = (char *) xrealloc (l->unicode_escape_p,
522 sizeof (char)*l->max);
524 l->line [l->size] = c;
525 l->unicode_escape_p [l->size++] = unicode_escape_p;
529 java_read_unicode (lex, unicode_escape_p)
531 int *unicode_escape_p;
535 c = java_read_char (lex);
536 *unicode_escape_p = 0;
545 if ((lex->bs_count) % 2 == 1)
547 /* Odd number of \ seen. */
548 c = java_read_char (lex);
551 unicode_t unicode = 0;
554 /* Recognize any number of `u's in \u. */
555 while ((c = java_read_char (lex)) == 'u')
558 /* Unget the most recent character as it is not a `u'. */
561 lex->unget_value = c;
563 /* Next should be 4 hex digits, otherwise it's an error.
564 The hex value is converted into the unicode, pushed into
565 the Unicode stream. */
566 for (shift = 12; shift >= 0; shift -= 4)
568 if ((c = java_read_char (lex)) == UEOF)
571 unicode |= (unicode_t)(hex_value (c) << shift);
573 java_lex_error ("Non hex digit in Unicode escape sequence", 0);
576 *unicode_escape_p = 1;
579 lex->unget_value = c;
581 return (unicode_t) '\\';
585 java_read_unicode_collapsing_terminators (lex, unicode_escape_p)
587 int *unicode_escape_p;
589 int c = java_read_unicode (lex, unicode_escape_p);
593 /* We have to read ahead to see if we got \r\n. In that case we
594 return a single line terminator. */
596 c = java_read_unicode (lex, &dummy);
598 lex->unget_value = c;
599 /* In either case we must return a newline. */
609 /* It's time to read a line when... */
610 if (!ctxp->c_line || ctxp->c_line->current == ctxp->c_line->size)
615 if (ctxp->lexer->hit_eof)
618 java_allocate_new_line ();
619 if (ctxp->c_line->line[0] != '\n')
623 int unicode_escape_p;
624 c = java_read_unicode_collapsing_terminators (ctxp->lexer,
629 java_store_unicode (ctxp->c_line, c, unicode_escape_p);
630 if (ctxp->c_line->white_space_only
631 && !JAVA_WHITE_SPACE_P (c)
633 ctxp->c_line->white_space_only = 0;
635 if ((c == '\n') || (c == UEOF))
639 if (c == UEOF && ! found_chars)
641 ctxp->lexer->hit_eof = 1;
646 ctxp->c_line->char_col += JAVA_COLUMN_DELTA (0);
647 JAVA_LEX_CHAR (ctxp->c_line->line [ctxp->c_line->current]);
648 return ctxp->c_line->line [ctxp->c_line->current++];
651 /* Parse the end of a C style comment.
652 * C is the first character following the '/' and '*'. */
654 java_parse_end_comment (c)
657 for ( ;; c = java_get_unicode ())
662 java_lex_error ("Comment not terminated at end of input", 0);
665 switch (c = java_get_unicode ())
668 java_lex_error ("Comment not terminated at end of input", 0);
672 case '*': /* Reparse only '*'. */
673 java_unget_unicode ();
679 /* Parse the documentation section. Keywords must be at the beginning
680 of a documentation comment line (ignoring white space and any `*'
681 character). Parsed keyword(s): @DEPRECATED. */
684 java_parse_doc_section (c)
687 int valid_tag = 0, seen_star = 0;
689 while (JAVA_WHITE_SPACE_P (c) || (c == '*') || c == '\n')
701 c = java_get_unicode();
705 java_lex_error ("Comment not terminated at end of input", 0);
707 if (seen_star && (c == '/'))
708 return 1; /* Goto step1 in caller. */
710 /* We're parsing `@deprecated'. */
711 if (valid_tag && (c == '@'))
716 while (tag_index < 10 && c != UEOF && c != ' ' && c != '\n')
718 c = java_get_unicode ();
719 tag [tag_index++] = c;
723 java_lex_error ("Comment not terminated at end of input", 0);
724 tag [tag_index] = '\0';
726 if (!strcmp (tag, "deprecated"))
727 ctxp->deprecated = 1;
729 java_unget_unicode ();
733 /* Return true if C is a valid start character for a Java identifier.
734 This is only called if C >= 128 -- smaller values are handled
735 inline. However, this function handles all values anyway. */
737 java_start_char_p (c)
740 unsigned int hi = c / 256;
741 const char *const page = type_table[hi];
742 unsigned long val = (unsigned long) page;
745 if ((val & ~ (LETTER_PART | LETTER_START)) != 0)
746 flags = page[c & 255];
750 return flags & LETTER_START;
753 /* Return true if C is a valid part character for a Java identifier.
754 This is only called if C >= 128 -- smaller values are handled
755 inline. However, this function handles all values anyway. */
760 unsigned int hi = c / 256;
761 const char *const page = type_table[hi];
762 unsigned long val = (unsigned long) page;
765 if ((val & ~ (LETTER_PART | LETTER_START)) != 0)
766 flags = page[c & 255];
770 return flags & LETTER_PART;
774 java_parse_escape_sequence ()
779 switch (c = java_get_unicode ())
782 return (unicode_t)0x8;
784 return (unicode_t)0x9;
786 return (unicode_t)0xa;
788 return (unicode_t)0xc;
790 return (unicode_t)0xd;
792 return (unicode_t)0x22;
794 return (unicode_t)0x27;
796 return (unicode_t)0x5c;
797 case '0': case '1': case '2': case '3': case '4':
798 case '5': case '6': case '7':
801 int octal_escape_index = 0;
805 for (; octal_escape_index < max && RANGE (c, '0', '7');
806 c = java_get_unicode ())
808 if (octal_escape_index == 0 && c > '3')
810 /* According to the grammar, `\477' has a well-defined
811 meaning -- it is `\47' followed by `7'. */
814 octal_escape [octal_escape_index++] = c;
817 java_unget_unicode ();
819 for (char_lit=0, i = 0, shift = 3*(octal_escape_index-1);
820 i < octal_escape_index; i++, shift -= 3)
821 char_lit |= (octal_escape [i] - '0') << shift;
826 java_lex_error ("Invalid character in escape sequence", 0);
827 return JAVA_CHAR_ERROR;
831 /* Isolate the code which may raise an arithmetic exception in its
840 int number_beginning;
843 #define IS_ZERO(X) (ereal_cmp (X, dconst0) == 0)
845 static void java_perform_atof PARAMS ((PTR));
848 java_perform_atof (av)
851 struct jpa_args *a = (struct jpa_args *)av;
852 YYSTYPE *java_lval = a->java_lval;
853 int number_beginning = a->number_beginning;
854 REAL_VALUE_TYPE value;
855 tree type = (a->fflag ? FLOAT_TYPE_NODE : DOUBLE_TYPE_NODE);
857 SET_REAL_VALUE_ATOF (value,
858 REAL_VALUE_ATOF (a->literal_token, TYPE_MODE (type)));
860 if (REAL_VALUE_ISINF (value) || REAL_VALUE_ISNAN (value))
862 JAVA_FLOAT_RANGE_ERROR ((a->fflag ? "float" : "double"));
865 else if (IS_ZERO (value))
867 /* We check to see if the value is really 0 or if we've found an
868 underflow. We do this in the most primitive imaginable way. */
870 char *p = a->literal_token;
873 while (*p && *p != 'e' && *p != 'E')
875 if (*p != '0' && *p != '.')
884 int i = ctxp->c_line->current;
885 ctxp->c_line->current = number_beginning;
886 java_lex_error ("Floating point literal underflow", 0);
887 ctxp->c_line->current = i;
891 SET_LVAL_NODE_TYPE (build_real (type, value), type);
895 static int yylex PARAMS ((YYSTYPE *));
906 unicode_t first_unicode;
907 int ascii_index, all_ascii;
910 /* Translation of the Unicode escape in the raw stream of Unicode
911 characters. Takes care of line terminator. */
913 /* Skip white spaces: SP, TAB and FF or ULT. */
914 for (c = java_get_unicode ();
915 c == '\n' || JAVA_WHITE_SPACE_P (c); c = java_get_unicode ())
918 ctxp->elc.line = ctxp->c_line->lineno;
919 ctxp->elc.col = ctxp->c_line->char_col-2;
922 ctxp->elc.col = (ctxp->elc.col < 0 ? 0 : ctxp->elc.col);
924 if (c == 0x1a) /* CTRL-Z. */
926 if ((c = java_get_unicode ()) == UEOF)
927 return 0; /* Ok here. */
929 java_unget_unicode (); /* Caught later, at the end of the
932 /* Handle EOF here. */
933 if (c == UEOF) /* Should probably do something here... */
936 /* Take care of eventual comments. */
939 switch (c = java_get_unicode ())
944 c = java_get_unicode ();
947 /* It is ok to end a `//' comment with EOF, unless
948 we're being pedantic. */
950 java_lex_error ("Comment not terminated at end of input",
954 if (c == '\n') /* ULT */
960 if ((c = java_get_unicode ()) == '*')
962 if ((c = java_get_unicode ()) == '/')
963 goto step1; /* Empty documentation comment. */
964 else if (java_parse_doc_section (c))
968 java_parse_end_comment ((c = java_get_unicode ()));
972 java_unget_unicode ();
978 ctxp->elc.line = ctxp->c_line->lineno;
979 ctxp->elc.prev_col = ctxp->elc.col;
980 ctxp->elc.col = ctxp->c_line->char_col - JAVA_COLUMN_DELTA (-1);
981 if (ctxp->elc.col < 0)
984 /* Numeric literals. */
985 if (JAVA_ASCII_DIGIT (c) || (c == '.'))
987 /* This section of code is borrowed from gcc/c-lex.c. */
988 #define TOTAL_PARTS ((HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR) * 2 + 2)
989 int parts[TOTAL_PARTS];
990 HOST_WIDE_INT high, low;
991 /* End borrowed section. */
992 char literal_token [256];
993 int literal_index = 0, radix = 10, long_suffix = 0, overflow = 0, bytes;
994 int found_hex_digits = 0, found_non_octal_digits = 0;
997 int number_beginning = ctxp->c_line->current;
1001 /* We might have a . separator instead of a FP like .[0-9]*. */
1004 unicode_t peep = java_sneak_unicode ();
1006 if (!JAVA_ASCII_DIGIT (peep))
1009 BUILD_OPERATOR (DOT_TK);
1013 for (i = 0; i < TOTAL_PARTS; i++)
1018 c = java_get_unicode ();
1019 if (c == 'x' || c == 'X')
1022 c = java_get_unicode ();
1024 else if (JAVA_ASCII_DIGIT (c))
1028 /* Push the '.' back and prepare for a FP parsing... */
1029 java_unget_unicode ();
1034 /* We have a zero literal: 0, 0{l,L}, 0{f,F}, 0{d,D}. */
1035 JAVA_LEX_LIT ("0", 10);
1039 SET_LVAL_NODE (long_zero_node);
1040 return (INT_LIT_TK);
1042 SET_LVAL_NODE (float_zero_node);
1045 SET_LVAL_NODE (double_zero_node);
1048 java_unget_unicode ();
1049 SET_LVAL_NODE (integer_zero_node);
1050 return (INT_LIT_TK);
1054 /* Parse the first part of the literal, until we find something
1055 which is not a number. */
1056 while ((radix == 16 && JAVA_ASCII_HEXDIGIT (c)) ||
1057 JAVA_ASCII_DIGIT (c))
1059 /* We store in a string (in case it turns out to be a FP) and in
1060 PARTS if we have to process a integer literal. */
1061 int numeric = hex_value (c);
1064 /* Remember when we find a valid hexadecimal digit. */
1066 found_hex_digits = 1;
1067 /* Remember when we find an invalid octal digit. */
1068 else if (radix == 8 && !JAVA_ASCII_OCTDIGIT (c))
1069 found_non_octal_digits = 1;
1071 literal_token [literal_index++] = c;
1072 /* This section of code if borrowed from gcc/c-lex.c. */
1073 for (count = 0; count < TOTAL_PARTS; count++)
1075 parts[count] *= radix;
1078 parts[count] += (parts[count-1] >> HOST_BITS_PER_CHAR);
1079 parts[count-1] &= (1 << HOST_BITS_PER_CHAR) - 1;
1082 parts[0] += numeric;
1084 if (parts [TOTAL_PARTS-1] != 0)
1086 /* End borrowed section. */
1087 c = java_get_unicode ();
1090 /* If we have something from the FP char set but not a digit, parse
1092 if (JAVA_ASCII_FPCHAR (c) && !JAVA_ASCII_DIGIT (c))
1095 int seen_digit = (literal_index ? 1 : 0);
1096 int seen_exponent = 0;
1097 int fflag = 0; /* 1 for {f,F}, 0 for {d,D}. FP literal are
1098 double unless specified. */
1100 /* It is ok if the radix is 8 because this just means we've
1101 seen a leading `0'. However, radix==16 is invalid. */
1103 java_lex_error ("Can't express non-decimal FP literal", 0);
1113 literal_token [literal_index++ ] = c;
1114 c = java_get_unicode ();
1117 java_lex_error ("Invalid character in FP literal", 0);
1120 if (c == 'e' || c == 'E')
1124 /* {E,e} must have seen at least a digit. */
1127 ("Invalid FP literal, mantissa must have digit", 0);
1131 literal_token [literal_index++] = c;
1132 c = java_get_unicode ();
1135 java_lex_error ("Invalid character in FP literal", 0);
1137 if ( c == 'f' || c == 'F' || c == 'd' || c == 'D')
1139 fflag = ((c == 'd') || (c == 'D')) ? 0 : 1;
1140 stage = 4; /* So we fall through. */
1143 if ((c=='-' || c =='+') && stage == 2)
1146 literal_token [literal_index++] = c;
1147 c = java_get_unicode ();
1150 if ((stage == 0 && JAVA_ASCII_FPCHAR (c)) ||
1151 (stage == 1 && JAVA_ASCII_FPCHAR (c) && !(c == '.')) ||
1152 (stage == 2 && (JAVA_ASCII_DIGIT (c) || JAVA_FP_PM (c))) ||
1153 (stage == 3 && JAVA_ASCII_DIGIT (c)))
1155 if (JAVA_ASCII_DIGIT (c))
1157 literal_token [literal_index++ ] = c;
1158 c = java_get_unicode ();
1165 if (stage != 4) /* Don't push back fF/dD. */
1166 java_unget_unicode ();
1168 /* An exponent (if any) must have seen a digit. */
1169 if (seen_exponent && !seen_digit)
1171 ("Invalid FP literal, exponent must have digit", 0);
1173 literal_token [literal_index] = '\0';
1174 JAVA_LEX_LIT (literal_token, radix);
1177 a.literal_token = literal_token;
1179 a.java_lval = java_lval;
1180 a.number_beginning = number_beginning;
1181 if (do_float_handler (java_perform_atof, (PTR) &a))
1184 JAVA_FLOAT_RANGE_ERROR ((fflag ? "float" : "double"));
1190 } /* JAVA_ASCII_FPCHAR (c) */
1192 /* Here we get back to converting the integral literal. */
1193 if (radix == 16 && ! found_hex_digits)
1195 ("0x must be followed by at least one hexadecimal digit", 0);
1196 else if (radix == 8 && found_non_octal_digits)
1197 java_lex_error ("Octal literal contains digit out of range", 0);
1198 else if (c == 'L' || c == 'l')
1201 java_unget_unicode ();
1203 #ifdef JAVA_LEX_DEBUG
1204 literal_token [literal_index] = '\0'; /* So JAVA_LEX_LIT is safe. */
1205 JAVA_LEX_LIT (literal_token, radix);
1207 /* This section of code is borrowed from gcc/c-lex.c. */
1210 bytes = GET_TYPE_PRECISION (long_type_node);
1211 for (i = bytes; i < TOTAL_PARTS; i++)
1219 for (i = 0; i < HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR; i++)
1221 high |= ((HOST_WIDE_INT) parts[i + (HOST_BITS_PER_WIDE_INT
1222 / HOST_BITS_PER_CHAR)]
1223 << (i * HOST_BITS_PER_CHAR));
1224 low |= (HOST_WIDE_INT) parts[i] << (i * HOST_BITS_PER_CHAR);
1226 /* End borrowed section. */
1228 /* Range checking. */
1231 /* 9223372036854775808L is valid if operand of a '-'. Otherwise
1232 9223372036854775807L is the biggest `long' literal that can be
1233 expressed using a 10 radix. For other radices, everything that
1234 fits withing 64 bits is OK. */
1235 int hb = (high >> 31);
1236 if (overflow || (hb && low && radix == 10)
1237 || (hb && high & 0x7fffffff && radix == 10))
1238 JAVA_INTEGRAL_RANGE_ERROR ("Numeric overflow for `long' literal");
1242 /* 2147483648 is valid if operand of a '-'. Otherwise,
1243 2147483647 is the biggest `int' literal that can be
1244 expressed using a 10 radix. For other radices, everything
1245 that fits within 32 bits is OK. As all literals are
1246 signed, we sign extend here. */
1247 int hb = (low >> 31) & 0x1;
1248 if (overflow || high || (hb && low & 0x7fffffff && radix == 10))
1249 JAVA_INTEGRAL_RANGE_ERROR ("Numeric overflow for `int' literal");
1253 value = build_int_2 (low, high);
1254 JAVA_RADIX10_FLAG (value) = radix == 10;
1255 SET_LVAL_NODE_TYPE (value, long_suffix ? long_type_node : int_type_node);
1257 SET_LVAL_NODE_TYPE (build_int_2 (low, high),
1258 long_suffix ? long_type_node : int_type_node);
1263 /* Character literals. */
1267 if ((c = java_get_unicode ()) == '\\')
1268 char_lit = java_parse_escape_sequence ();
1271 if (c == '\n' || c == '\'')
1272 java_lex_error ("Invalid character literal", 0);
1276 c = java_get_unicode ();
1278 if ((c == '\n') || (c == UEOF))
1279 java_lex_error ("Character literal not terminated at end of line", 0);
1281 java_lex_error ("Syntax error in character literal", 0);
1283 if (char_lit == JAVA_CHAR_ERROR)
1284 char_lit = 0; /* We silently convert it to zero. */
1286 JAVA_LEX_CHAR_LIT (char_lit);
1287 SET_LVAL_NODE_TYPE (build_int_2 (char_lit, 0), char_type_node);
1291 /* String literals. */
1297 for (no_error = 1, c = java_get_unicode ();
1298 c != UEOF && c != '"' && c != '\n'; c = java_get_unicode ())
1301 c = java_parse_escape_sequence ();
1302 if (c == JAVA_CHAR_ERROR)
1305 c = 0; /* We silently convert it to zero. */
1307 java_unicode_2_utf8 (c);
1309 if (c == '\n' || c == UEOF) /* ULT. */
1311 lineno--; /* Refer to the line where the terminator was seen. */
1312 java_lex_error ("String not terminated at end of line", 0);
1316 obstack_1grow (&temporary_obstack, '\0');
1317 string = obstack_finish (&temporary_obstack);
1319 if (!no_error || (c != '"'))
1320 java_lval->node = error_mark_node; /* FIXME: Requires futher
1323 java_lval->node = build_string (strlen (string), string);
1325 obstack_free (&temporary_obstack, string);
1326 return STRING_LIT_TK;
1334 BUILD_OPERATOR (OP_TK);
1340 if (ctxp->ccb_indent == 1)
1341 ctxp->first_ccb_indent1 = lineno;
1343 BUILD_OPERATOR (OCB_TK);
1347 if (ctxp->ccb_indent == 1)
1348 ctxp->last_ccb_indent1 = lineno;
1349 BUILD_OPERATOR (CCB_TK);
1352 BUILD_OPERATOR (OSB_TK);
1364 BUILD_OPERATOR (DOT_TK);
1365 /* return DOT_TK; */
1372 if ((c = java_get_unicode ()) == '=')
1374 BUILD_OPERATOR (EQ_TK);
1378 /* Equals is used in two different locations. In the
1379 variable_declarator: rule, it has to be seen as '=' as opposed
1380 to being seen as an ordinary assignment operator in
1381 assignment_operators: rule. */
1382 java_unget_unicode ();
1383 BUILD_OPERATOR (ASSIGN_TK);
1387 switch ((c = java_get_unicode ()))
1390 BUILD_OPERATOR (GTE_TK);
1392 switch ((c = java_get_unicode ()))
1395 if ((c = java_get_unicode ()) == '=')
1397 BUILD_OPERATOR2 (ZRS_ASSIGN_TK);
1401 java_unget_unicode ();
1402 BUILD_OPERATOR (ZRS_TK);
1405 BUILD_OPERATOR2 (SRS_ASSIGN_TK);
1407 java_unget_unicode ();
1408 BUILD_OPERATOR (SRS_TK);
1411 java_unget_unicode ();
1412 BUILD_OPERATOR (GT_TK);
1416 switch ((c = java_get_unicode ()))
1419 BUILD_OPERATOR (LTE_TK);
1421 if ((c = java_get_unicode ()) == '=')
1423 BUILD_OPERATOR2 (LS_ASSIGN_TK);
1427 java_unget_unicode ();
1428 BUILD_OPERATOR (LS_TK);
1431 java_unget_unicode ();
1432 BUILD_OPERATOR (LT_TK);
1436 switch ((c = java_get_unicode ()))
1439 BUILD_OPERATOR (BOOL_AND_TK);
1441 BUILD_OPERATOR2 (AND_ASSIGN_TK);
1443 java_unget_unicode ();
1444 BUILD_OPERATOR (AND_TK);
1448 switch ((c = java_get_unicode ()))
1451 BUILD_OPERATOR (BOOL_OR_TK);
1453 BUILD_OPERATOR2 (OR_ASSIGN_TK);
1455 java_unget_unicode ();
1456 BUILD_OPERATOR (OR_TK);
1460 switch ((c = java_get_unicode ()))
1463 BUILD_OPERATOR (INCR_TK);
1465 BUILD_OPERATOR2 (PLUS_ASSIGN_TK);
1467 java_unget_unicode ();
1468 BUILD_OPERATOR (PLUS_TK);
1472 switch ((c = java_get_unicode ()))
1475 BUILD_OPERATOR (DECR_TK);
1477 BUILD_OPERATOR2 (MINUS_ASSIGN_TK);
1479 java_unget_unicode ();
1480 BUILD_OPERATOR (MINUS_TK);
1484 if ((c = java_get_unicode ()) == '=')
1486 BUILD_OPERATOR2 (MULT_ASSIGN_TK);
1490 java_unget_unicode ();
1491 BUILD_OPERATOR (MULT_TK);
1495 if ((c = java_get_unicode ()) == '=')
1497 BUILD_OPERATOR2 (DIV_ASSIGN_TK);
1501 java_unget_unicode ();
1502 BUILD_OPERATOR (DIV_TK);
1506 if ((c = java_get_unicode ()) == '=')
1508 BUILD_OPERATOR2 (XOR_ASSIGN_TK);
1512 java_unget_unicode ();
1513 BUILD_OPERATOR (XOR_TK);
1517 if ((c = java_get_unicode ()) == '=')
1519 BUILD_OPERATOR2 (REM_ASSIGN_TK);
1523 java_unget_unicode ();
1524 BUILD_OPERATOR (REM_TK);
1528 if ((c = java_get_unicode()) == '=')
1530 BUILD_OPERATOR (NEQ_TK);
1534 java_unget_unicode ();
1535 BUILD_OPERATOR (NEG_TK);
1540 BUILD_OPERATOR (REL_QM_TK);
1543 BUILD_OPERATOR (REL_CL_TK);
1545 BUILD_OPERATOR (NOT_TK);
1548 /* Keyword, boolean literal or null literal. */
1549 for (first_unicode = c, all_ascii = 1, ascii_index = 0;
1550 JAVA_PART_CHAR_P (c); c = java_get_unicode ())
1552 java_unicode_2_utf8 (c);
1553 if (all_ascii && c >= 128)
1558 obstack_1grow (&temporary_obstack, '\0');
1559 string = obstack_finish (&temporary_obstack);
1560 java_unget_unicode ();
1562 /* If we have something all ascii, we consider a keyword, a boolean
1563 literal, a null literal or an all ASCII identifier. Otherwise,
1564 this is an identifier (possibly not respecting formation rule). */
1567 const struct java_keyword *kw;
1568 if ((kw=java_keyword (string, ascii_index)))
1570 JAVA_LEX_KW (string);
1573 case PUBLIC_TK: case PROTECTED_TK: case STATIC_TK:
1574 case ABSTRACT_TK: case FINAL_TK: case NATIVE_TK:
1575 case SYNCHRONIZED_TK: case TRANSIENT_TK: case VOLATILE_TK:
1576 case PRIVATE_TK: case STRICT_TK:
1577 SET_MODIFIER_CTX (kw->token);
1580 SET_LVAL_NODE (float_type_node);
1583 SET_LVAL_NODE (double_type_node);
1586 SET_LVAL_NODE (boolean_type_node);
1589 SET_LVAL_NODE (byte_type_node);
1592 SET_LVAL_NODE (short_type_node);
1595 SET_LVAL_NODE (int_type_node);
1598 SET_LVAL_NODE (long_type_node);
1601 SET_LVAL_NODE (char_type_node);
1604 /* Keyword based literals. */
1607 SET_LVAL_NODE ((kw->token == TRUE_TK ?
1608 boolean_true_node : boolean_false_node));
1611 SET_LVAL_NODE (null_pointer_node);
1614 /* Some keyword we want to retain information on the location
1615 they where found. */
1627 BUILD_OPERATOR (kw->token);
1635 /* We may have an ID here. */
1636 if (JAVA_START_CHAR_P (first_unicode))
1638 JAVA_LEX_ID (string);
1639 java_lval->node = BUILD_ID_WFL (GET_IDENTIFIER (string));
1643 /* Everything else is an invalid character in the input. */
1645 char lex_error_buffer [128];
1646 sprintf (lex_error_buffer, "Invalid character `%s' in input",
1647 java_sprint_unicode (ctxp->c_line, ctxp->c_line->current));
1648 java_lex_error (lex_error_buffer, 1);
1654 /* This is called by the parser to see if an error should be generated
1655 due to numeric overflow. This function only handles the particular
1656 case of the largest negative value, and is only called in the case
1657 where this value is not preceded by `-'. */
1659 error_if_numeric_overflow (value)
1662 if (TREE_CODE (value) == INTEGER_CST && JAVA_RADIX10_FLAG (value))
1664 unsigned HOST_WIDE_INT lo, hi;
1666 lo = TREE_INT_CST_LOW (value);
1667 hi = TREE_INT_CST_HIGH (value);
1668 if (TREE_TYPE (value) == long_type_node)
1670 int hb = (hi >> 31);
1671 if (hb && !(hi & 0x7fffffff))
1672 java_lex_error ("Numeric overflow for `long' literal", 0);
1676 int hb = (lo >> 31) & 0x1;
1677 if (hb && !(lo & 0x7fffffff))
1678 java_lex_error ("Numeric overflow for `int' literal", 0);
1682 #endif /* JC1_LITE */
1685 java_unicode_2_utf8 (unicode)
1688 if (RANGE (unicode, 0x01, 0x7f))
1689 obstack_1grow (&temporary_obstack, (char)unicode);
1690 else if (RANGE (unicode, 0x80, 0x7ff) || unicode == 0)
1692 obstack_1grow (&temporary_obstack,
1693 (unsigned char)(0xc0 | ((0x7c0 & unicode) >> 6)));
1694 obstack_1grow (&temporary_obstack,
1695 (unsigned char)(0x80 | (unicode & 0x3f)));
1697 else /* Range 0x800-0xffff. */
1699 obstack_1grow (&temporary_obstack,
1700 (unsigned char)(0xe0 | (unicode & 0xf000) >> 12));
1701 obstack_1grow (&temporary_obstack,
1702 (unsigned char)(0x80 | (unicode & 0x0fc0) >> 6));
1703 obstack_1grow (&temporary_obstack,
1704 (unsigned char)(0x80 | (unicode & 0x003f)));
1710 build_wfl_node (node)
1713 node = build_expr_wfl (node, ctxp->filename, ctxp->elc.line, ctxp->elc.col);
1714 /* Prevent java_complete_lhs from short-circuiting node (if constant). */
1715 TREE_TYPE (node) = NULL_TREE;
1721 java_lex_error (msg, forward)
1722 const char *msg ATTRIBUTE_UNUSED;
1723 int forward ATTRIBUTE_UNUSED;
1726 ctxp->elc.line = ctxp->c_line->lineno;
1727 ctxp->elc.col = ctxp->c_line->char_col-1+forward;
1729 /* Might be caught in the middle of some error report. */
1730 ctxp->java_error_flag = 0;
1747 if (next != '\n' && next != EOF)
1759 java_get_line_col (filename, line, col)
1760 const char *filename ATTRIBUTE_UNUSED;
1761 int line ATTRIBUTE_UNUSED, col ATTRIBUTE_UNUSED;
1766 /* Dumb implementation. Doesn't try to cache or optimize things. */
1767 /* First line of the file is line 1, first column is 1. */
1769 /* COL == -1 means, at the CR/LF in LINE. */
1770 /* COL == -2 means, at the first non space char in LINE. */
1773 int c, ccol, cline = 1;
1774 int current_line_col = 0;
1775 int first_non_space = 0;
1778 if (!(fp = fopen (filename, "r")))
1779 fatal_io_error ("can't open %s", filename);
1781 while (cline != line)
1786 static const char msg[] = "<<file too short - unexpected EOF>>";
1787 obstack_grow (&temporary_obstack, msg, sizeof(msg)-1);
1790 if (java_is_eol (fp, c))
1794 /* Gather the chars of the current line in a buffer. */
1798 if (c < 0 || java_is_eol (fp, c))
1800 if (!first_non_space && !JAVA_WHITE_SPACE_P (c))
1801 first_non_space = current_line_col;
1802 obstack_1grow (&temporary_obstack, c);
1807 obstack_1grow (&temporary_obstack, '\n');
1811 col = current_line_col;
1812 first_non_space = 0;
1815 col = first_non_space;
1817 first_non_space = 0;
1819 /* Place the '^' a the right position. */
1820 base = obstack_base (&temporary_obstack);
1821 for (ccol = 1; ccol <= col+3; ccol++)
1823 /* Compute \t when reaching first_non_space. */
1824 char c = (first_non_space ?
1825 (base [ccol-1] == '\t' ? '\t' : ' ') : ' ');
1826 obstack_1grow (&temporary_obstack, c);
1828 obstack_grow0 (&temporary_obstack, "^", 1);
1831 return obstack_finish (&temporary_obstack);
1837 utf8_cmp (str, length, name)
1838 const unsigned char *str;
1842 const unsigned char *limit = str + length;
1845 for (i = 0; name[i]; ++i)
1847 int ch = UTF8_GET (str, limit);
1849 return ch - name[i];
1852 return str == limit ? 0 : 1;
1855 /* A sorted list of all C++ keywords. */
1857 static const char *const cxx_keywords[] =
1965 /* Return true if NAME is a C++ keyword. */
1968 cxx_keyword_p (name, length)
1972 int last = ARRAY_SIZE (cxx_keywords);
1974 int mid = (last + first) / 2;
1977 for (mid = (last + first) / 2;
1979 old = mid, mid = (last + first) / 2)
1981 int kwl = strlen (cxx_keywords[mid]);
1982 int min_length = kwl > length ? length : kwl;
1983 int r = utf8_cmp (name, min_length, cxx_keywords[mid]);
1988 /* We've found a match if all the remaining characters are `$'. */
1989 for (i = min_length; i < length && name[i] == '$'; ++i)
2003 #endif /* JC1_LITE */