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d45cf215 | 1 | /* Lexical analyzer for C and Objective C. |
e8bbfc4e RK |
2 | Copyright (C) 1987, 1988, 1989, 1992 Free Software Foundation, Inc. |
3 | ||
4 | This file is part of GNU CC. | |
5 | ||
6 | GNU CC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU CC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU CC; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include <stdio.h> | |
22 | #include <errno.h> | |
23 | #include <setjmp.h> | |
24 | ||
25 | #include "config.h" | |
26 | #include "rtl.h" | |
27 | #include "tree.h" | |
28 | #include "input.h" | |
29 | #include "c-lex.h" | |
30 | #include "c-tree.h" | |
31 | #include "flags.h" | |
32 | #include "c-parse.h" | |
33 | ||
34 | #ifdef MULTIBYTE_CHARS | |
35 | #include <stdlib.h> | |
36 | #include <locale.h> | |
37 | #endif | |
38 | ||
39 | #ifndef errno | |
40 | extern int errno; | |
41 | #endif | |
42 | ||
43 | /* The elements of `ridpointers' are identifier nodes | |
44 | for the reserved type names and storage classes. | |
45 | It is indexed by a RID_... value. */ | |
46 | tree ridpointers[(int) RID_MAX]; | |
47 | ||
48 | /* Cause the `yydebug' variable to be defined. */ | |
49 | #define YYDEBUG 1 | |
50 | ||
51 | /* the declaration found for the last IDENTIFIER token read in. | |
52 | yylex must look this up to detect typedefs, which get token type TYPENAME, | |
53 | so it is left around in case the identifier is not a typedef but is | |
54 | used in a context which makes it a reference to a variable. */ | |
55 | tree lastiddecl; | |
56 | ||
57 | /* Nonzero enables objc features. */ | |
58 | ||
59 | int doing_objc_thang; | |
60 | ||
61 | extern tree lookup_interface (); | |
62 | ||
63 | extern int yydebug; | |
64 | ||
65 | /* File used for outputting assembler code. */ | |
66 | extern FILE *asm_out_file; | |
67 | ||
68 | #ifndef WCHAR_TYPE_SIZE | |
69 | #ifdef INT_TYPE_SIZE | |
70 | #define WCHAR_TYPE_SIZE INT_TYPE_SIZE | |
71 | #else | |
72 | #define WCHAR_TYPE_SIZE BITS_PER_WORD | |
73 | #endif | |
74 | #endif | |
75 | ||
76 | /* Number of bytes in a wide character. */ | |
77 | #define WCHAR_BYTES (WCHAR_TYPE_SIZE / BITS_PER_UNIT) | |
78 | ||
79 | static int maxtoken; /* Current nominal length of token buffer. */ | |
80 | char *token_buffer; /* Pointer to token buffer. | |
81 | Actual allocated length is maxtoken + 2. | |
82 | This is not static because objc-parse.y uses it. */ | |
83 | ||
84 | /* Nonzero if end-of-file has been seen on input. */ | |
85 | static int end_of_file; | |
86 | ||
87 | /* Buffered-back input character; faster than using ungetc. */ | |
88 | static int nextchar = -1; | |
89 | ||
90 | int check_newline (); | |
91 | ||
92 | /* Nonzero tells yylex to ignore \ in string constants. */ | |
93 | static int ignore_escape_flag = 0; | |
94 | \f | |
95 | /* C code produced by gperf version 2.5 (GNU C++ version) */ | |
96 | /* Command-line: gperf -p -j1 -i 1 -g -o -t -N is_reserved_word -k1,3,$ c-parse.gperf */ | |
97 | struct resword { char *name; short token; enum rid rid; }; | |
98 | ||
c4c7fef1 | 99 | #define TOTAL_KEYWORDS 61 |
e8bbfc4e RK |
100 | #define MIN_WORD_LENGTH 2 |
101 | #define MAX_WORD_LENGTH 13 | |
c4c7fef1 RS |
102 | #define MIN_HASH_VALUE 10 |
103 | #define MAX_HASH_VALUE 95 | |
104 | /* maximum key range = 86, duplicates = 0 */ | |
e8bbfc4e RK |
105 | |
106 | #ifdef __GNUC__ | |
107 | __inline | |
108 | #endif | |
109 | static unsigned int | |
110 | hash (str, len) | |
111 | register char *str; | |
112 | register int unsigned len; | |
113 | { | |
114 | static unsigned char asso_values[] = | |
115 | { | |
c4c7fef1 RS |
116 | 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, |
117 | 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, | |
118 | 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, | |
119 | 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, | |
120 | 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, | |
121 | 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, | |
122 | 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, | |
123 | 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, | |
124 | 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, | |
125 | 96, 96, 96, 96, 96, 1, 96, 15, 13, 23, | |
126 | 1, 6, 32, 36, 3, 5, 96, 1, 20, 29, | |
127 | 31, 44, 19, 96, 13, 2, 1, 54, 39, 11, | |
128 | 5, 96, 3, 96, 96, 96, 96, 96, | |
e8bbfc4e RK |
129 | }; |
130 | register int hval = len; | |
131 | ||
132 | switch (hval) | |
133 | { | |
134 | default: | |
135 | case 3: | |
136 | hval += asso_values[str[2]]; | |
137 | case 2: | |
138 | case 1: | |
139 | hval += asso_values[str[0]]; | |
140 | } | |
141 | return hval + asso_values[str[len - 1]]; | |
142 | } | |
143 | ||
144 | #ifdef __GNUC__ | |
145 | __inline | |
146 | #endif | |
147 | struct resword * | |
148 | is_reserved_word (str, len) | |
149 | register char *str; | |
150 | register unsigned int len; | |
151 | { | |
152 | static struct resword wordlist[] = | |
153 | { | |
c4c7fef1 | 154 | {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, |
e8bbfc4e | 155 | {"",}, |
e8bbfc4e | 156 | {"int", TYPESPEC, RID_INT}, |
c4c7fef1 RS |
157 | {"",}, |
158 | {"__signed", TYPESPEC, RID_SIGNED}, | |
6506ecd7 | 159 | {"__typeof__", TYPEOF, NORID}, |
e8bbfc4e | 160 | {"__signed__", TYPESPEC, RID_SIGNED}, |
c4c7fef1 | 161 | {"__imag__", IMAGPART, NORID}, |
6506ecd7 | 162 | {"switch", SWITCH, NORID}, |
6506ecd7 | 163 | {"__inline__", SCSPEC, RID_INLINE}, |
c4c7fef1 | 164 | {"else", ELSE, NORID}, |
6506ecd7 | 165 | {"__iterator__", SCSPEC, RID_ITERATOR}, |
6506ecd7 RS |
166 | {"__inline", SCSPEC, RID_INLINE}, |
167 | {"__extension__", EXTENSION, NORID}, | |
122026c0 | 168 | {"struct", STRUCT, NORID}, |
c4c7fef1 RS |
169 | {"__real__", REALPART, NORID}, |
170 | {"__asm__", ASM_KEYWORD, NORID}, | |
171 | {"break", BREAK, NORID}, | |
172 | {"",}, | |
173 | {"while", WHILE, NORID}, | |
6506ecd7 | 174 | {"__alignof__", ALIGNOF, NORID}, |
c4c7fef1 | 175 | {"__iterator", SCSPEC, RID_ITERATOR}, |
6506ecd7 | 176 | {"__attribute__", ATTRIBUTE, NORID}, |
e8bbfc4e | 177 | {"__label__", LABEL, NORID}, |
c4c7fef1 | 178 | {"__const", TYPE_QUAL, RID_CONST}, |
6506ecd7 | 179 | {"__attribute", ATTRIBUTE, NORID}, |
c4c7fef1 RS |
180 | {"__const__", TYPE_QUAL, RID_CONST}, |
181 | {"case", CASE, NORID}, | |
182 | {"__complex__", TYPESPEC, RID_COMPLEX}, | |
183 | {"inline", SCSPEC, RID_INLINE}, | |
184 | {"__complex", TYPESPEC, RID_COMPLEX}, | |
185 | {"if", IF, NORID}, | |
186 | {"__real", REALPART, NORID}, | |
187 | {"default", DEFAULT, NORID}, | |
188 | {"__typeof", TYPEOF, NORID}, | |
189 | {"sizeof", SIZEOF, NORID}, | |
e8bbfc4e | 190 | {"extern", SCSPEC, RID_EXTERN}, |
c4c7fef1 | 191 | {"signed", TYPESPEC, RID_SIGNED}, |
122026c0 | 192 | {"static", SCSPEC, RID_STATIC}, |
c4c7fef1 RS |
193 | {"do", DO, NORID}, |
194 | {"__imag", IMAGPART, NORID}, | |
195 | {"void", TYPESPEC, RID_VOID}, | |
196 | {"__asm", ASM_KEYWORD, NORID}, | |
197 | {"return", RETURN, NORID}, | |
198 | {"short", TYPESPEC, RID_SHORT}, | |
199 | {"__volatile__", TYPE_QUAL, RID_VOLATILE}, | |
200 | {"",}, | |
201 | {"char", TYPESPEC, RID_CHAR}, | |
122026c0 | 202 | {"__volatile", TYPE_QUAL, RID_VOLATILE}, |
c4c7fef1 RS |
203 | {"__alignof", ALIGNOF, NORID}, |
204 | {"typeof", TYPEOF, NORID}, | |
205 | {"typedef", SCSPEC, RID_TYPEDEF}, | |
122026c0 RS |
206 | {"const", TYPE_QUAL, RID_CONST}, |
207 | {"for", FOR, NORID}, | |
122026c0 | 208 | {"",}, {"",}, |
c4c7fef1 RS |
209 | {"auto", SCSPEC, RID_AUTO}, |
210 | {"unsigned", TYPESPEC, RID_UNSIGNED}, | |
211 | {"",}, | |
212 | {"double", TYPESPEC, RID_DOUBLE}, | |
122026c0 | 213 | {"continue", CONTINUE, NORID}, |
c4c7fef1 | 214 | {"",}, |
122026c0 | 215 | {"register", SCSPEC, RID_REGISTER}, |
122026c0 | 216 | {"",}, {"",}, |
6506ecd7 | 217 | {"volatile", TYPE_QUAL, RID_VOLATILE}, |
c4c7fef1 RS |
218 | {"",}, {"",}, |
219 | {"asm", ASM_KEYWORD, NORID}, | |
220 | {"",}, {"",}, {"",}, {"",}, {"",}, | |
221 | {"float", TYPESPEC, RID_FLOAT}, | |
222 | {"",}, {"",}, | |
223 | {"goto", GOTO, NORID}, | |
224 | {"",}, {"",}, {"",}, {"",}, {"",}, | |
225 | {"long", TYPESPEC, RID_LONG}, | |
226 | {"",}, | |
122026c0 RS |
227 | {"enum", ENUM, NORID}, |
228 | {"",}, | |
c4c7fef1 | 229 | {"union", UNION, NORID}, |
e8bbfc4e RK |
230 | }; |
231 | ||
232 | if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH) | |
233 | { | |
234 | register int key = hash (str, len); | |
235 | ||
236 | if (key <= MAX_HASH_VALUE && key >= 0) | |
237 | { | |
238 | register char *s = wordlist[key].name; | |
239 | ||
240 | if (*s == *str && !strcmp (str + 1, s + 1)) | |
241 | return &wordlist[key]; | |
242 | } | |
243 | } | |
244 | return 0; | |
245 | } | |
246 | \f | |
247 | /* Return something to represent absolute declarators containing a *. | |
248 | TARGET is the absolute declarator that the * contains. | |
249 | TYPE_QUALS is a list of modifiers such as const or volatile | |
250 | to apply to the pointer type, represented as identifiers. | |
251 | ||
252 | We return an INDIRECT_REF whose "contents" are TARGET | |
253 | and whose type is the modifier list. */ | |
254 | ||
255 | tree | |
256 | make_pointer_declarator (type_quals, target) | |
257 | tree type_quals, target; | |
258 | { | |
259 | return build1 (INDIRECT_REF, type_quals, target); | |
260 | } | |
261 | \f | |
262 | void | |
263 | init_lex () | |
264 | { | |
265 | /* Make identifier nodes long enough for the language-specific slots. */ | |
266 | set_identifier_size (sizeof (struct lang_identifier)); | |
267 | ||
268 | /* Start it at 0, because check_newline is called at the very beginning | |
269 | and will increment it to 1. */ | |
270 | lineno = 0; | |
271 | ||
272 | #ifdef MULTIBYTE_CHARS | |
273 | /* Change to the native locale for multibyte conversions. */ | |
274 | setlocale (LC_CTYPE, ""); | |
275 | #endif | |
276 | ||
277 | maxtoken = 40; | |
278 | token_buffer = (char *) xmalloc (maxtoken + 2); | |
279 | ||
280 | ridpointers[(int) RID_INT] = get_identifier ("int"); | |
281 | ridpointers[(int) RID_CHAR] = get_identifier ("char"); | |
282 | ridpointers[(int) RID_VOID] = get_identifier ("void"); | |
283 | ridpointers[(int) RID_FLOAT] = get_identifier ("float"); | |
284 | ridpointers[(int) RID_DOUBLE] = get_identifier ("double"); | |
285 | ridpointers[(int) RID_SHORT] = get_identifier ("short"); | |
286 | ridpointers[(int) RID_LONG] = get_identifier ("long"); | |
287 | ridpointers[(int) RID_UNSIGNED] = get_identifier ("unsigned"); | |
288 | ridpointers[(int) RID_SIGNED] = get_identifier ("signed"); | |
289 | ridpointers[(int) RID_INLINE] = get_identifier ("inline"); | |
290 | ridpointers[(int) RID_CONST] = get_identifier ("const"); | |
291 | ridpointers[(int) RID_VOLATILE] = get_identifier ("volatile"); | |
292 | ridpointers[(int) RID_AUTO] = get_identifier ("auto"); | |
293 | ridpointers[(int) RID_STATIC] = get_identifier ("static"); | |
294 | ridpointers[(int) RID_EXTERN] = get_identifier ("extern"); | |
295 | ridpointers[(int) RID_TYPEDEF] = get_identifier ("typedef"); | |
296 | ridpointers[(int) RID_REGISTER] = get_identifier ("register"); | |
6506ecd7 | 297 | ridpointers[(int) RID_ITERATOR] = get_identifier ("iterator"); |
122026c0 | 298 | ridpointers[(int) RID_COMPLEX] = get_identifier ("complex"); |
e8bbfc4e RK |
299 | |
300 | /* Some options inhibit certain reserved words. | |
301 | Clear those words out of the hash table so they won't be recognized. */ | |
302 | #define UNSET_RESERVED_WORD(STRING) \ | |
303 | do { struct resword *s = is_reserved_word (STRING, sizeof (STRING) - 1); \ | |
304 | if (s) s->name = ""; } while (0) | |
305 | ||
306 | if (flag_traditional) | |
307 | { | |
308 | UNSET_RESERVED_WORD ("const"); | |
309 | UNSET_RESERVED_WORD ("volatile"); | |
310 | UNSET_RESERVED_WORD ("typeof"); | |
311 | UNSET_RESERVED_WORD ("signed"); | |
312 | UNSET_RESERVED_WORD ("inline"); | |
6f2f09cd | 313 | UNSET_RESERVED_WORD ("iterator"); |
122026c0 | 314 | UNSET_RESERVED_WORD ("complex"); |
e8bbfc4e RK |
315 | } |
316 | if (flag_no_asm) | |
317 | { | |
318 | UNSET_RESERVED_WORD ("asm"); | |
319 | UNSET_RESERVED_WORD ("typeof"); | |
320 | UNSET_RESERVED_WORD ("inline"); | |
6f2f09cd | 321 | UNSET_RESERVED_WORD ("iterator"); |
122026c0 | 322 | UNSET_RESERVED_WORD ("complex"); |
e8bbfc4e RK |
323 | } |
324 | } | |
325 | ||
326 | void | |
327 | reinit_parse_for_function () | |
328 | { | |
329 | } | |
330 | \f | |
331 | /* Function used when yydebug is set, to print a token in more detail. */ | |
332 | ||
333 | void | |
334 | yyprint (file, yychar, yylval) | |
335 | FILE *file; | |
336 | int yychar; | |
337 | YYSTYPE yylval; | |
338 | { | |
339 | tree t; | |
340 | switch (yychar) | |
341 | { | |
342 | case IDENTIFIER: | |
343 | case TYPENAME: | |
344 | t = yylval.ttype; | |
345 | if (IDENTIFIER_POINTER (t)) | |
346 | fprintf (file, " `%s'", IDENTIFIER_POINTER (t)); | |
347 | break; | |
348 | ||
349 | case CONSTANT: | |
350 | t = yylval.ttype; | |
351 | if (TREE_CODE (t) == INTEGER_CST) | |
8d9bfdc5 RK |
352 | fprintf (file, |
353 | #if HOST_BITS_PER_WIDE_INT == 64 | |
354 | #if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT | |
355 | " 0x%lx%016lx", | |
356 | #else | |
357 | " 0x%x%016x", | |
358 | #endif | |
359 | #else | |
360 | #if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT | |
361 | " 0x%lx%08lx", | |
362 | #else | |
363 | " 0x%x%08x", | |
364 | #endif | |
365 | #endif | |
366 | TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t)); | |
e8bbfc4e RK |
367 | break; |
368 | } | |
369 | } | |
370 | ||
371 | \f | |
372 | /* If C is not whitespace, return C. | |
373 | Otherwise skip whitespace and return first nonwhite char read. */ | |
374 | ||
375 | static int | |
376 | skip_white_space (c) | |
377 | register int c; | |
378 | { | |
0dcd8cee | 379 | static int newline_warning = 0; |
e8bbfc4e RK |
380 | |
381 | for (;;) | |
382 | { | |
383 | switch (c) | |
384 | { | |
0dcd8cee RS |
385 | /* We don't recognize comments here, because |
386 | cpp output can include / and * consecutively as operators. | |
387 | Also, there's no need, since cpp removes all comments. */ | |
e8bbfc4e RK |
388 | |
389 | case '\n': | |
390 | c = check_newline (); | |
391 | break; | |
392 | ||
393 | case ' ': | |
394 | case '\t': | |
395 | case '\f': | |
e8bbfc4e RK |
396 | case '\v': |
397 | case '\b': | |
398 | c = getc (finput); | |
399 | break; | |
400 | ||
0dcd8cee RS |
401 | case '\r': |
402 | /* ANSI C says the effects of a carriage return in a source file | |
403 | are undefined. */ | |
404 | if (pedantic && !newline_warning) | |
405 | { | |
406 | warning ("carriage return in source file"); | |
407 | warning ("(we only warn about the first carriage return)"); | |
408 | newline_warning = 1; | |
409 | } | |
410 | c = getc (finput); | |
411 | break; | |
412 | ||
e8bbfc4e RK |
413 | case '\\': |
414 | c = getc (finput); | |
415 | if (c == '\n') | |
416 | lineno++; | |
417 | else | |
418 | error ("stray '\\' in program"); | |
419 | c = getc (finput); | |
420 | break; | |
421 | ||
422 | default: | |
423 | return (c); | |
424 | } | |
425 | } | |
426 | } | |
427 | ||
428 | /* Skips all of the white space at the current location in the input file. | |
429 | Must use and reset nextchar if it has the next character. */ | |
430 | ||
431 | void | |
432 | position_after_white_space () | |
433 | { | |
434 | register int c; | |
435 | ||
436 | if (nextchar != -1) | |
437 | c = nextchar, nextchar = -1; | |
438 | else | |
439 | c = getc (finput); | |
440 | ||
441 | ungetc (skip_white_space (c), finput); | |
442 | } | |
443 | ||
444 | /* Make the token buffer longer, preserving the data in it. | |
445 | P should point to just beyond the last valid character in the old buffer. | |
446 | The value we return is a pointer to the new buffer | |
447 | at a place corresponding to P. */ | |
448 | ||
449 | static char * | |
450 | extend_token_buffer (p) | |
451 | char *p; | |
452 | { | |
453 | int offset = p - token_buffer; | |
454 | ||
455 | maxtoken = maxtoken * 2 + 10; | |
456 | token_buffer = (char *) xrealloc (token_buffer, maxtoken + 2); | |
457 | ||
458 | return token_buffer + offset; | |
459 | } | |
460 | \f | |
461 | /* At the beginning of a line, increment the line number | |
462 | and process any #-directive on this line. | |
463 | If the line is a #-directive, read the entire line and return a newline. | |
464 | Otherwise, return the line's first non-whitespace character. */ | |
465 | ||
466 | int | |
467 | check_newline () | |
468 | { | |
469 | register int c; | |
470 | register int token; | |
471 | ||
472 | lineno++; | |
473 | ||
474 | /* Read first nonwhite char on the line. */ | |
475 | ||
476 | c = getc (finput); | |
477 | while (c == ' ' || c == '\t') | |
478 | c = getc (finput); | |
479 | ||
480 | if (c != '#') | |
481 | { | |
482 | /* If not #, return it so caller will use it. */ | |
483 | return c; | |
484 | } | |
485 | ||
486 | /* Read first nonwhite char after the `#'. */ | |
487 | ||
488 | c = getc (finput); | |
489 | while (c == ' ' || c == '\t') | |
490 | c = getc (finput); | |
491 | ||
492 | /* If a letter follows, then if the word here is `line', skip | |
493 | it and ignore it; otherwise, ignore the line, with an error | |
494 | if the word isn't `pragma', `ident', `define', or `undef'. */ | |
495 | ||
496 | if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) | |
497 | { | |
498 | if (c == 'p') | |
499 | { | |
500 | if (getc (finput) == 'r' | |
501 | && getc (finput) == 'a' | |
502 | && getc (finput) == 'g' | |
503 | && getc (finput) == 'm' | |
504 | && getc (finput) == 'a' | |
505 | && ((c = getc (finput)) == ' ' || c == '\t' || c == '\n')) | |
506 | { | |
ca5b800a | 507 | #ifdef HANDLE_SYSV_PRAGMA |
a3100298 | 508 | return handle_sysv_pragma (finput, c); |
ca5b800a | 509 | #endif /* HANDLE_SYSV_PRAGMA */ |
e8bbfc4e RK |
510 | #ifdef HANDLE_PRAGMA |
511 | HANDLE_PRAGMA (finput); | |
512 | #endif /* HANDLE_PRAGMA */ | |
513 | goto skipline; | |
514 | } | |
515 | } | |
516 | ||
517 | else if (c == 'd') | |
518 | { | |
519 | if (getc (finput) == 'e' | |
520 | && getc (finput) == 'f' | |
521 | && getc (finput) == 'i' | |
522 | && getc (finput) == 'n' | |
523 | && getc (finput) == 'e' | |
524 | && ((c = getc (finput)) == ' ' || c == '\t' || c == '\n')) | |
525 | { | |
526 | #ifdef DWARF_DEBUGGING_INFO | |
527 | if ((debug_info_level == DINFO_LEVEL_VERBOSE) | |
528 | && (write_symbols == DWARF_DEBUG)) | |
529 | dwarfout_define (lineno, get_directive_line (finput)); | |
530 | #endif /* DWARF_DEBUGGING_INFO */ | |
531 | goto skipline; | |
532 | } | |
533 | } | |
534 | else if (c == 'u') | |
535 | { | |
536 | if (getc (finput) == 'n' | |
537 | && getc (finput) == 'd' | |
538 | && getc (finput) == 'e' | |
539 | && getc (finput) == 'f' | |
540 | && ((c = getc (finput)) == ' ' || c == '\t' || c == '\n')) | |
541 | { | |
542 | #ifdef DWARF_DEBUGGING_INFO | |
543 | if ((debug_info_level == DINFO_LEVEL_VERBOSE) | |
544 | && (write_symbols == DWARF_DEBUG)) | |
545 | dwarfout_undef (lineno, get_directive_line (finput)); | |
546 | #endif /* DWARF_DEBUGGING_INFO */ | |
547 | goto skipline; | |
548 | } | |
549 | } | |
550 | else if (c == 'l') | |
551 | { | |
552 | if (getc (finput) == 'i' | |
553 | && getc (finput) == 'n' | |
554 | && getc (finput) == 'e' | |
555 | && ((c = getc (finput)) == ' ' || c == '\t')) | |
556 | goto linenum; | |
557 | } | |
558 | else if (c == 'i') | |
559 | { | |
560 | if (getc (finput) == 'd' | |
561 | && getc (finput) == 'e' | |
562 | && getc (finput) == 'n' | |
563 | && getc (finput) == 't' | |
564 | && ((c = getc (finput)) == ' ' || c == '\t')) | |
565 | { | |
566 | /* #ident. The pedantic warning is now in cccp.c. */ | |
567 | ||
568 | /* Here we have just seen `#ident '. | |
569 | A string constant should follow. */ | |
570 | ||
571 | while (c == ' ' || c == '\t') | |
572 | c = getc (finput); | |
573 | ||
574 | /* If no argument, ignore the line. */ | |
575 | if (c == '\n') | |
576 | return c; | |
577 | ||
578 | ungetc (c, finput); | |
579 | token = yylex (); | |
580 | if (token != STRING | |
581 | || TREE_CODE (yylval.ttype) != STRING_CST) | |
582 | { | |
583 | error ("invalid #ident"); | |
584 | goto skipline; | |
585 | } | |
586 | ||
587 | if (!flag_no_ident) | |
588 | { | |
589 | #ifdef ASM_OUTPUT_IDENT | |
590 | ASM_OUTPUT_IDENT (asm_out_file, TREE_STRING_POINTER (yylval.ttype)); | |
591 | #endif | |
592 | } | |
593 | ||
594 | /* Skip the rest of this line. */ | |
595 | goto skipline; | |
596 | } | |
597 | } | |
598 | ||
599 | error ("undefined or invalid # directive"); | |
600 | goto skipline; | |
601 | } | |
602 | ||
603 | linenum: | |
604 | /* Here we have either `#line' or `# <nonletter>'. | |
605 | In either case, it should be a line number; a digit should follow. */ | |
606 | ||
607 | while (c == ' ' || c == '\t') | |
608 | c = getc (finput); | |
609 | ||
610 | /* If the # is the only nonwhite char on the line, | |
611 | just ignore it. Check the new newline. */ | |
612 | if (c == '\n') | |
613 | return c; | |
614 | ||
615 | /* Something follows the #; read a token. */ | |
616 | ||
617 | ungetc (c, finput); | |
618 | token = yylex (); | |
619 | ||
620 | if (token == CONSTANT | |
621 | && TREE_CODE (yylval.ttype) == INTEGER_CST) | |
622 | { | |
623 | int old_lineno = lineno; | |
624 | int used_up = 0; | |
625 | /* subtract one, because it is the following line that | |
626 | gets the specified number */ | |
627 | ||
628 | int l = TREE_INT_CST_LOW (yylval.ttype) - 1; | |
629 | ||
630 | /* Is this the last nonwhite stuff on the line? */ | |
631 | c = getc (finput); | |
632 | while (c == ' ' || c == '\t') | |
633 | c = getc (finput); | |
634 | if (c == '\n') | |
635 | { | |
636 | /* No more: store the line number and check following line. */ | |
637 | lineno = l; | |
638 | return c; | |
639 | } | |
640 | ungetc (c, finput); | |
641 | ||
642 | /* More follows: it must be a string constant (filename). */ | |
643 | ||
644 | /* Read the string constant, but don't treat \ as special. */ | |
645 | ignore_escape_flag = 1; | |
646 | token = yylex (); | |
647 | ignore_escape_flag = 0; | |
648 | ||
649 | if (token != STRING || TREE_CODE (yylval.ttype) != STRING_CST) | |
650 | { | |
651 | error ("invalid #line"); | |
652 | goto skipline; | |
653 | } | |
654 | ||
655 | input_filename | |
656 | = (char *) permalloc (TREE_STRING_LENGTH (yylval.ttype) + 1); | |
657 | strcpy (input_filename, TREE_STRING_POINTER (yylval.ttype)); | |
658 | lineno = l; | |
659 | ||
660 | /* Each change of file name | |
661 | reinitializes whether we are now in a system header. */ | |
662 | in_system_header = 0; | |
663 | ||
664 | if (main_input_filename == 0) | |
665 | main_input_filename = input_filename; | |
666 | ||
667 | /* Is this the last nonwhite stuff on the line? */ | |
668 | c = getc (finput); | |
669 | while (c == ' ' || c == '\t') | |
670 | c = getc (finput); | |
671 | if (c == '\n') | |
5b450ae5 RS |
672 | { |
673 | /* Update the name in the top element of input_file_stack. */ | |
674 | if (input_file_stack) | |
675 | input_file_stack->name = input_filename; | |
676 | ||
677 | return c; | |
678 | } | |
e8bbfc4e RK |
679 | ungetc (c, finput); |
680 | ||
681 | token = yylex (); | |
682 | used_up = 0; | |
683 | ||
684 | /* `1' after file name means entering new file. | |
685 | `2' after file name means just left a file. */ | |
686 | ||
687 | if (token == CONSTANT | |
688 | && TREE_CODE (yylval.ttype) == INTEGER_CST) | |
689 | { | |
690 | if (TREE_INT_CST_LOW (yylval.ttype) == 1) | |
691 | { | |
692 | /* Pushing to a new file. */ | |
693 | struct file_stack *p | |
694 | = (struct file_stack *) xmalloc (sizeof (struct file_stack)); | |
695 | input_file_stack->line = old_lineno; | |
696 | p->next = input_file_stack; | |
697 | p->name = input_filename; | |
698 | input_file_stack = p; | |
699 | input_file_stack_tick++; | |
700 | #ifdef DWARF_DEBUGGING_INFO | |
701 | if (debug_info_level == DINFO_LEVEL_VERBOSE | |
702 | && write_symbols == DWARF_DEBUG) | |
703 | dwarfout_start_new_source_file (input_filename); | |
704 | #endif /* DWARF_DEBUGGING_INFO */ | |
705 | ||
706 | used_up = 1; | |
707 | } | |
708 | else if (TREE_INT_CST_LOW (yylval.ttype) == 2) | |
709 | { | |
710 | /* Popping out of a file. */ | |
711 | if (input_file_stack->next) | |
712 | { | |
713 | struct file_stack *p = input_file_stack; | |
714 | input_file_stack = p->next; | |
715 | free (p); | |
716 | input_file_stack_tick++; | |
717 | #ifdef DWARF_DEBUGGING_INFO | |
718 | if (debug_info_level == DINFO_LEVEL_VERBOSE | |
719 | && write_symbols == DWARF_DEBUG) | |
720 | dwarfout_resume_previous_source_file (input_file_stack->line); | |
721 | #endif /* DWARF_DEBUGGING_INFO */ | |
722 | } | |
723 | else | |
724 | error ("#-lines for entering and leaving files don't match"); | |
725 | ||
726 | used_up = 1; | |
727 | } | |
728 | } | |
729 | ||
5b450ae5 RS |
730 | /* Now that we've pushed or popped the input stack, |
731 | update the name in the top element. */ | |
732 | if (input_file_stack) | |
733 | input_file_stack->name = input_filename; | |
734 | ||
e8bbfc4e RK |
735 | /* If we have handled a `1' or a `2', |
736 | see if there is another number to read. */ | |
737 | if (used_up) | |
738 | { | |
739 | /* Is this the last nonwhite stuff on the line? */ | |
740 | c = getc (finput); | |
741 | while (c == ' ' || c == '\t') | |
742 | c = getc (finput); | |
743 | if (c == '\n') | |
744 | return c; | |
745 | ungetc (c, finput); | |
746 | ||
747 | token = yylex (); | |
748 | used_up = 0; | |
749 | } | |
750 | ||
751 | /* `3' after file name means this is a system header file. */ | |
752 | ||
753 | if (token == CONSTANT | |
754 | && TREE_CODE (yylval.ttype) == INTEGER_CST | |
755 | && TREE_INT_CST_LOW (yylval.ttype) == 3) | |
756 | in_system_header = 1; | |
757 | } | |
758 | else | |
759 | error ("invalid #-line"); | |
760 | ||
761 | /* skip the rest of this line. */ | |
762 | skipline: | |
763 | if (c == '\n') | |
764 | return c; | |
765 | while ((c = getc (finput)) != EOF && c != '\n'); | |
766 | return c; | |
767 | } | |
768 | \f | |
ca5b800a RS |
769 | #ifdef HANDLE_SYSV_PRAGMA |
770 | ||
771 | /* Handle a #pragma directive. INPUT is the current input stream, | |
a3100298 TW |
772 | and C is a character to reread. Processes the entire input line |
773 | and returns a character for the caller to reread: either \n or EOF. */ | |
ca5b800a RS |
774 | |
775 | /* This function has to be in this file, in order to get at | |
776 | the token types. */ | |
777 | ||
778 | int | |
779 | handle_sysv_pragma (input, c) | |
780 | FILE *input; | |
781 | int c; | |
782 | { | |
a3100298 | 783 | for (;;) |
ca5b800a | 784 | { |
a3100298 TW |
785 | while (c == ' ' || c == '\t') |
786 | c = getc (input); | |
787 | if (c == '\n' || c == EOF) | |
788 | { | |
789 | handle_pragma_token (0, 0); | |
790 | return c; | |
791 | } | |
792 | ungetc (c, input); | |
793 | switch (yylex ()) | |
794 | { | |
795 | case IDENTIFIER: | |
796 | case TYPENAME: | |
797 | case STRING: | |
798 | case CONSTANT: | |
799 | handle_pragma_token (token_buffer, yylval.ttype); | |
800 | break; | |
801 | default: | |
802 | handle_pragma_token (token_buffer, 0); | |
803 | } | |
804 | if (nextchar >= 0) | |
805 | c = nextchar, nextchar = -1; | |
806 | else | |
807 | c = getc (input); | |
ca5b800a | 808 | } |
ca5b800a RS |
809 | } |
810 | ||
811 | #endif /* HANDLE_SYSV_PRAGMA */ | |
812 | \f | |
e8bbfc4e RK |
813 | #define isalnum(char) ((char >= 'a' && char <= 'z') || (char >= 'A' && char <= 'Z') || (char >= '0' && char <= '9')) |
814 | #define isdigit(char) (char >= '0' && char <= '9') | |
815 | #define ENDFILE -1 /* token that represents end-of-file */ | |
816 | ||
817 | /* Read an escape sequence, returning its equivalent as a character, | |
b70af677 | 818 | or store 1 in *ignore_ptr if it is backslash-newline. */ |
e8bbfc4e RK |
819 | |
820 | static int | |
b70af677 RS |
821 | readescape (ignore_ptr) |
822 | int *ignore_ptr; | |
e8bbfc4e RK |
823 | { |
824 | register int c = getc (finput); | |
825 | register int code; | |
826 | register unsigned count; | |
827 | unsigned firstdig; | |
8696da34 | 828 | int nonnull; |
e8bbfc4e RK |
829 | |
830 | switch (c) | |
831 | { | |
832 | case 'x': | |
833 | if (warn_traditional) | |
834 | warning ("the meaning of `\\x' varies with -traditional"); | |
835 | ||
836 | if (flag_traditional) | |
837 | return c; | |
838 | ||
839 | code = 0; | |
840 | count = 0; | |
8696da34 | 841 | nonnull = 0; |
e8bbfc4e RK |
842 | while (1) |
843 | { | |
844 | c = getc (finput); | |
845 | if (!(c >= 'a' && c <= 'f') | |
846 | && !(c >= 'A' && c <= 'F') | |
847 | && !(c >= '0' && c <= '9')) | |
848 | { | |
849 | ungetc (c, finput); | |
850 | break; | |
851 | } | |
852 | code *= 16; | |
853 | if (c >= 'a' && c <= 'f') | |
854 | code += c - 'a' + 10; | |
855 | if (c >= 'A' && c <= 'F') | |
856 | code += c - 'A' + 10; | |
857 | if (c >= '0' && c <= '9') | |
858 | code += c - '0'; | |
8696da34 RS |
859 | if (code != 0 || count != 0) |
860 | { | |
861 | if (count == 0) | |
862 | firstdig = code; | |
863 | count++; | |
864 | } | |
865 | nonnull = 1; | |
e8bbfc4e | 866 | } |
8696da34 | 867 | if (! nonnull) |
e8bbfc4e | 868 | error ("\\x used with no following hex digits"); |
be63d912 RS |
869 | else if (count == 0) |
870 | /* Digits are all 0's. Ok. */ | |
871 | ; | |
e8bbfc4e RK |
872 | else if ((count - 1) * 4 >= TYPE_PRECISION (integer_type_node) |
873 | || (count > 1 | |
874 | && ((1 << (TYPE_PRECISION (integer_type_node) - (count - 1) * 4)) | |
875 | <= firstdig))) | |
876 | pedwarn ("hex escape out of range"); | |
877 | return code; | |
878 | ||
879 | case '0': case '1': case '2': case '3': case '4': | |
880 | case '5': case '6': case '7': | |
881 | code = 0; | |
882 | count = 0; | |
883 | while ((c <= '7') && (c >= '0') && (count++ < 3)) | |
884 | { | |
885 | code = (code * 8) + (c - '0'); | |
886 | c = getc (finput); | |
887 | } | |
888 | ungetc (c, finput); | |
889 | return code; | |
890 | ||
891 | case '\\': case '\'': case '"': | |
892 | return c; | |
893 | ||
894 | case '\n': | |
895 | lineno++; | |
b70af677 RS |
896 | *ignore_ptr = 1; |
897 | return 0; | |
e8bbfc4e RK |
898 | |
899 | case 'n': | |
900 | return TARGET_NEWLINE; | |
901 | ||
902 | case 't': | |
903 | return TARGET_TAB; | |
904 | ||
905 | case 'r': | |
906 | return TARGET_CR; | |
907 | ||
908 | case 'f': | |
909 | return TARGET_FF; | |
910 | ||
911 | case 'b': | |
912 | return TARGET_BS; | |
913 | ||
914 | case 'a': | |
915 | if (warn_traditional) | |
916 | warning ("the meaning of `\\a' varies with -traditional"); | |
917 | ||
918 | if (flag_traditional) | |
919 | return c; | |
920 | return TARGET_BELL; | |
921 | ||
922 | case 'v': | |
923 | #if 0 /* Vertical tab is present in common usage compilers. */ | |
924 | if (flag_traditional) | |
925 | return c; | |
926 | #endif | |
927 | return TARGET_VT; | |
928 | ||
dad112ca | 929 | case 'e': |
e8bbfc4e | 930 | case 'E': |
dad112ca RS |
931 | if (pedantic) |
932 | pedwarn ("non-ANSI-standard escape sequence, `\\%c'", c); | |
e8bbfc4e RK |
933 | return 033; |
934 | ||
935 | case '?': | |
936 | return c; | |
937 | ||
938 | /* `\(', etc, are used at beginning of line to avoid confusing Emacs. */ | |
939 | case '(': | |
940 | case '{': | |
941 | case '[': | |
942 | if (pedantic) | |
943 | pedwarn ("non-ANSI escape sequence `\\%c'", c); | |
944 | return c; | |
945 | } | |
7e6b19dc | 946 | if (c >= 040 && c < 0177) |
e8bbfc4e RK |
947 | pedwarn ("unknown escape sequence `\\%c'", c); |
948 | else | |
949 | pedwarn ("unknown escape sequence: `\\' followed by char code 0x%x", c); | |
950 | return c; | |
951 | } | |
952 | \f | |
953 | void | |
954 | yyerror (string) | |
955 | char *string; | |
956 | { | |
957 | char buf[200]; | |
958 | ||
959 | strcpy (buf, string); | |
960 | ||
961 | /* We can't print string and character constants well | |
962 | because the token_buffer contains the result of processing escapes. */ | |
963 | if (end_of_file) | |
964 | strcat (buf, " at end of input"); | |
965 | else if (token_buffer[0] == 0) | |
966 | strcat (buf, " at null character"); | |
967 | else if (token_buffer[0] == '"') | |
968 | strcat (buf, " before string constant"); | |
969 | else if (token_buffer[0] == '\'') | |
970 | strcat (buf, " before character constant"); | |
971 | else if (token_buffer[0] < 040 || (unsigned char) token_buffer[0] >= 0177) | |
972 | sprintf (buf + strlen (buf), " before character 0%o", | |
973 | (unsigned char) token_buffer[0]); | |
974 | else | |
975 | strcat (buf, " before `%s'"); | |
976 | ||
977 | error (buf, token_buffer); | |
978 | } | |
979 | ||
980 | #if 0 | |
981 | ||
982 | struct try_type | |
983 | { | |
984 | tree *node_var; | |
985 | char unsigned_flag; | |
986 | char long_flag; | |
987 | char long_long_flag; | |
988 | }; | |
989 | ||
990 | struct try_type type_sequence[] = | |
991 | { | |
992 | { &integer_type_node, 0, 0, 0}, | |
993 | { &unsigned_type_node, 1, 0, 0}, | |
994 | { &long_integer_type_node, 0, 1, 0}, | |
995 | { &long_unsigned_type_node, 1, 1, 0}, | |
996 | { &long_long_integer_type_node, 0, 1, 1}, | |
997 | { &long_long_unsigned_type_node, 1, 1, 1} | |
998 | }; | |
999 | #endif /* 0 */ | |
1000 | \f | |
1001 | int | |
1002 | yylex () | |
1003 | { | |
1004 | register int c; | |
1005 | register char *p; | |
1006 | register int value; | |
1007 | int wide_flag = 0; | |
1008 | ||
1009 | if (nextchar >= 0) | |
1010 | c = nextchar, nextchar = -1; | |
1011 | else | |
1012 | c = getc (finput); | |
1013 | ||
1014 | /* Effectively do c = skip_white_space (c) | |
1015 | but do it faster in the usual cases. */ | |
1016 | while (1) | |
1017 | switch (c) | |
1018 | { | |
e8bbfc4e RK |
1019 | case ' ': |
1020 | case '\t': | |
1021 | case '\f': | |
1022 | case '\v': | |
1023 | case '\b': | |
1024 | c = getc (finput); | |
1025 | break; | |
1026 | ||
80f5b9d8 RS |
1027 | case '\r': |
1028 | /* Call skip_white_space so we can warn if appropriate. */ | |
1029 | ||
e8bbfc4e RK |
1030 | case '\n': |
1031 | case '/': | |
1032 | case '\\': | |
1033 | c = skip_white_space (c); | |
1034 | default: | |
1035 | goto found_nonwhite; | |
1036 | } | |
1037 | found_nonwhite: | |
1038 | ||
1039 | token_buffer[0] = c; | |
1040 | token_buffer[1] = 0; | |
1041 | ||
1042 | /* yylloc.first_line = lineno; */ | |
1043 | ||
1044 | switch (c) | |
1045 | { | |
1046 | case EOF: | |
1047 | end_of_file = 1; | |
1048 | token_buffer[0] = 0; | |
1049 | value = ENDFILE; | |
1050 | break; | |
1051 | ||
1052 | case '$': | |
1053 | if (dollars_in_ident) | |
1054 | goto letter; | |
1055 | return '$'; | |
1056 | ||
1057 | case 'L': | |
1058 | /* Capital L may start a wide-string or wide-character constant. */ | |
1059 | { | |
1060 | register int c = getc (finput); | |
1061 | if (c == '\'') | |
1062 | { | |
1063 | wide_flag = 1; | |
1064 | goto char_constant; | |
1065 | } | |
1066 | if (c == '"') | |
1067 | { | |
1068 | wide_flag = 1; | |
1069 | goto string_constant; | |
1070 | } | |
1071 | ungetc (c, finput); | |
1072 | } | |
1073 | goto letter; | |
1074 | ||
1075 | case '@': | |
1076 | if (!doing_objc_thang) | |
1077 | { | |
1078 | value = c; | |
1079 | break; | |
1080 | } | |
1081 | p = token_buffer; | |
1082 | *p++ = '@'; | |
1083 | c = getc (finput); | |
1084 | while (isalnum (c) || c == '_') | |
1085 | { | |
1086 | if (p >= token_buffer + maxtoken) | |
1087 | p = extend_token_buffer (p); | |
1088 | ||
1089 | *p++ = c; | |
1090 | c = getc (finput); | |
1091 | } | |
1092 | ||
1093 | *p = 0; | |
1094 | nextchar = c; | |
1095 | value = recognize_objc_keyword (token_buffer + 1); | |
1096 | if (value != 0) | |
1097 | break; | |
1098 | error ("invalid Objective C keyword `%s'", token_buffer); | |
1099 | /* Cause a syntax error--1 is not a valid token type. */ | |
1100 | value = 1; | |
1101 | break; | |
1102 | ||
1103 | case 'A': case 'B': case 'C': case 'D': case 'E': | |
1104 | case 'F': case 'G': case 'H': case 'I': case 'J': | |
1105 | case 'K': case 'M': case 'N': case 'O': | |
1106 | case 'P': case 'Q': case 'R': case 'S': case 'T': | |
1107 | case 'U': case 'V': case 'W': case 'X': case 'Y': | |
1108 | case 'Z': | |
1109 | case 'a': case 'b': case 'c': case 'd': case 'e': | |
1110 | case 'f': case 'g': case 'h': case 'i': case 'j': | |
1111 | case 'k': case 'l': case 'm': case 'n': case 'o': | |
1112 | case 'p': case 'q': case 'r': case 's': case 't': | |
1113 | case 'u': case 'v': case 'w': case 'x': case 'y': | |
1114 | case 'z': | |
1115 | case '_': | |
1116 | letter: | |
1117 | p = token_buffer; | |
1118 | while (isalnum (c) || c == '_' || c == '$' || c == '@') | |
1119 | { | |
8355fc27 RS |
1120 | /* Make sure this char really belongs in an identifier. */ |
1121 | if (c == '@' && ! doing_objc_thang) | |
1122 | break; | |
e8bbfc4e RK |
1123 | if (c == '$' && ! dollars_in_ident) |
1124 | break; | |
1125 | ||
8355fc27 RS |
1126 | if (p >= token_buffer + maxtoken) |
1127 | p = extend_token_buffer (p); | |
1128 | ||
e8bbfc4e RK |
1129 | *p++ = c; |
1130 | c = getc (finput); | |
1131 | } | |
1132 | ||
1133 | *p = 0; | |
1134 | nextchar = c; | |
1135 | ||
1136 | value = IDENTIFIER; | |
1137 | yylval.itype = 0; | |
1138 | ||
1139 | /* Try to recognize a keyword. Uses minimum-perfect hash function */ | |
1140 | ||
1141 | { | |
1142 | register struct resword *ptr; | |
1143 | ||
1144 | if (ptr = is_reserved_word (token_buffer, p - token_buffer)) | |
1145 | { | |
1146 | if (ptr->rid) | |
1147 | yylval.ttype = ridpointers[(int) ptr->rid]; | |
1148 | value = (int) ptr->token; | |
1149 | ||
1150 | /* Even if we decided to recognize asm, still perhaps warn. */ | |
1151 | if (pedantic | |
d45cf215 | 1152 | && (value == ASM_KEYWORD || value == TYPEOF |
e8bbfc4e RK |
1153 | || ptr->rid == RID_INLINE) |
1154 | && token_buffer[0] != '_') | |
1155 | pedwarn ("ANSI does not permit the keyword `%s'", | |
1156 | token_buffer); | |
1157 | } | |
1158 | } | |
1159 | ||
1160 | /* If we did not find a keyword, look for an identifier | |
1161 | (or a typename). */ | |
1162 | ||
1163 | if (value == IDENTIFIER) | |
1164 | { | |
1165 | yylval.ttype = get_identifier (token_buffer); | |
1166 | lastiddecl = lookup_name (yylval.ttype); | |
1167 | ||
1168 | if (lastiddecl != 0 && TREE_CODE (lastiddecl) == TYPE_DECL) | |
1169 | value = TYPENAME; | |
6dbf678a RS |
1170 | /* A user-invisible read-only initialized variable |
1171 | should be replaced by its value. | |
1172 | We handle only strings since that's the only case used in C. */ | |
1173 | else if (lastiddecl != 0 && TREE_CODE (lastiddecl) == VAR_DECL | |
1174 | && DECL_IGNORED_P (lastiddecl) | |
1175 | && TREE_READONLY (lastiddecl) | |
1176 | && DECL_INITIAL (lastiddecl) != 0 | |
1177 | && TREE_CODE (DECL_INITIAL (lastiddecl)) == STRING_CST) | |
1178 | { | |
8f7ac220 RS |
1179 | tree stringval = DECL_INITIAL (lastiddecl); |
1180 | ||
1181 | /* Copy the string value so that we won't clobber anything | |
1182 | if we put something in the TREE_CHAIN of this one. */ | |
1183 | yylval.ttype = build_string (TREE_STRING_LENGTH (stringval), | |
1184 | TREE_STRING_POINTER (stringval)); | |
6dbf678a RS |
1185 | value = STRING; |
1186 | } | |
e8bbfc4e RK |
1187 | else if (doing_objc_thang) |
1188 | { | |
1189 | tree objc_interface_decl = lookup_interface (yylval.ttype); | |
1190 | ||
1191 | if (objc_interface_decl) | |
1192 | { | |
1193 | value = CLASSNAME; | |
1194 | yylval.ttype = objc_interface_decl; | |
1195 | } | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | break; | |
1200 | ||
1201 | case '0': case '1': case '2': case '3': case '4': | |
1202 | case '5': case '6': case '7': case '8': case '9': | |
1203 | case '.': | |
1204 | { | |
1205 | int base = 10; | |
1206 | int count = 0; | |
1207 | int largest_digit = 0; | |
1208 | int numdigits = 0; | |
1209 | /* for multi-precision arithmetic, | |
4ca827d0 RS |
1210 | we actually store only HOST_BITS_PER_CHAR bits in each part. |
1211 | The number of parts is chosen so as to be sufficient to hold | |
9b0995aa RK |
1212 | the enough bits to fit into the two HOST_WIDE_INTs that contain |
1213 | the integer value (this is always at least as many bits as are | |
1214 | in a target `long long' value, but may be wider). */ | |
1215 | #define TOTAL_PARTS ((HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR) * 2 + 2) | |
4ca827d0 | 1216 | int parts[TOTAL_PARTS]; |
e8bbfc4e RK |
1217 | int overflow = 0; |
1218 | ||
1219 | enum anon1 { NOT_FLOAT, AFTER_POINT, TOO_MANY_POINTS} floatflag | |
1220 | = NOT_FLOAT; | |
1221 | ||
4ca827d0 RS |
1222 | for (count = 0; count < TOTAL_PARTS; count++) |
1223 | parts[count] = 0; | |
e8bbfc4e RK |
1224 | |
1225 | p = token_buffer; | |
1226 | *p++ = c; | |
1227 | ||
1228 | if (c == '0') | |
1229 | { | |
1230 | *p++ = (c = getc (finput)); | |
1231 | if ((c == 'x') || (c == 'X')) | |
1232 | { | |
1233 | base = 16; | |
1234 | *p++ = (c = getc (finput)); | |
1235 | } | |
1236 | /* Leading 0 forces octal unless the 0 is the only digit. */ | |
1237 | else if (c >= '0' && c <= '9') | |
1238 | { | |
1239 | base = 8; | |
1240 | numdigits++; | |
1241 | } | |
1242 | else | |
1243 | numdigits++; | |
1244 | } | |
1245 | ||
1246 | /* Read all the digits-and-decimal-points. */ | |
1247 | ||
1248 | while (c == '.' | |
122026c0 RS |
1249 | || (isalnum (c) && c != 'l' && c != 'L' |
1250 | && c != 'u' && c != 'U' | |
1251 | && c != 'i' && c != 'I' && c != 'j' && c != 'J' | |
e8bbfc4e RK |
1252 | && (floatflag == NOT_FLOAT || ((c != 'f') && (c != 'F'))))) |
1253 | { | |
1254 | if (c == '.') | |
1255 | { | |
1256 | if (base == 16) | |
1257 | error ("floating constant may not be in radix 16"); | |
1258 | if (floatflag == AFTER_POINT) | |
1259 | { | |
1260 | error ("malformed floating constant"); | |
1261 | floatflag = TOO_MANY_POINTS; | |
1262 | } | |
1263 | else | |
1264 | floatflag = AFTER_POINT; | |
1265 | ||
1266 | base = 10; | |
1267 | *p++ = c = getc (finput); | |
1268 | /* Accept '.' as the start of a floating-point number | |
1269 | only when it is followed by a digit. | |
1270 | Otherwise, unread the following non-digit | |
1271 | and use the '.' as a structural token. */ | |
1272 | if (p == token_buffer + 2 && !isdigit (c)) | |
1273 | { | |
1274 | if (c == '.') | |
1275 | { | |
1276 | c = getc (finput); | |
1277 | if (c == '.') | |
1278 | { | |
1279 | *p++ = c; | |
1280 | *p = 0; | |
1281 | return ELLIPSIS; | |
1282 | } | |
1283 | error ("parse error at `..'"); | |
1284 | } | |
1285 | ungetc (c, finput); | |
1286 | token_buffer[1] = 0; | |
1287 | value = '.'; | |
1288 | goto done; | |
1289 | } | |
1290 | } | |
1291 | else | |
1292 | { | |
1293 | /* It is not a decimal point. | |
1294 | It should be a digit (perhaps a hex digit). */ | |
1295 | ||
1296 | if (isdigit (c)) | |
1297 | { | |
1298 | c = c - '0'; | |
1299 | } | |
1300 | else if (base <= 10) | |
1301 | { | |
f3acae4d | 1302 | if (c == 'e' || c == 'E') |
e8bbfc4e RK |
1303 | { |
1304 | base = 10; | |
1305 | floatflag = AFTER_POINT; | |
1306 | break; /* start of exponent */ | |
1307 | } | |
1308 | error ("nondigits in number and not hexadecimal"); | |
1309 | c = 0; | |
1310 | } | |
1311 | else if (c >= 'a') | |
1312 | { | |
1313 | c = c - 'a' + 10; | |
1314 | } | |
1315 | else | |
1316 | { | |
1317 | c = c - 'A' + 10; | |
1318 | } | |
1319 | if (c >= largest_digit) | |
1320 | largest_digit = c; | |
1321 | numdigits++; | |
1322 | ||
4ca827d0 | 1323 | for (count = 0; count < TOTAL_PARTS; count++) |
e8bbfc4e | 1324 | { |
4ca827d0 | 1325 | parts[count] *= base; |
e8bbfc4e RK |
1326 | if (count) |
1327 | { | |
4ca827d0 RS |
1328 | parts[count] |
1329 | += (parts[count-1] >> HOST_BITS_PER_CHAR); | |
1330 | parts[count-1] | |
1331 | &= (1 << HOST_BITS_PER_CHAR) - 1; | |
e8bbfc4e | 1332 | } |
4ca827d0 RS |
1333 | else |
1334 | parts[0] += c; | |
e8bbfc4e RK |
1335 | } |
1336 | ||
4ca827d0 RS |
1337 | /* If the extra highest-order part ever gets anything in it, |
1338 | the number is certainly too big. */ | |
1339 | if (parts[TOTAL_PARTS - 1] != 0) | |
1340 | overflow = 1; | |
e8bbfc4e RK |
1341 | |
1342 | if (p >= token_buffer + maxtoken - 3) | |
1343 | p = extend_token_buffer (p); | |
1344 | *p++ = (c = getc (finput)); | |
1345 | } | |
1346 | } | |
1347 | ||
1348 | if (numdigits == 0) | |
1349 | error ("numeric constant with no digits"); | |
1350 | ||
1351 | if (largest_digit >= base) | |
1352 | error ("numeric constant contains digits beyond the radix"); | |
1353 | ||
1354 | /* Remove terminating char from the token buffer and delimit the string */ | |
1355 | *--p = 0; | |
1356 | ||
1357 | if (floatflag != NOT_FLOAT) | |
1358 | { | |
1359 | tree type = double_type_node; | |
63ea33ce | 1360 | int garbage_chars = 0, exceeds_double = 0; |
122026c0 | 1361 | int imag = 0; |
e8bbfc4e RK |
1362 | REAL_VALUE_TYPE value; |
1363 | jmp_buf handler; | |
1364 | ||
1365 | /* Read explicit exponent if any, and put it in tokenbuf. */ | |
1366 | ||
1367 | if ((c == 'e') || (c == 'E')) | |
1368 | { | |
1369 | if (p >= token_buffer + maxtoken - 3) | |
1370 | p = extend_token_buffer (p); | |
1371 | *p++ = c; | |
1372 | c = getc (finput); | |
1373 | if ((c == '+') || (c == '-')) | |
1374 | { | |
1375 | *p++ = c; | |
1376 | c = getc (finput); | |
1377 | } | |
1378 | if (! isdigit (c)) | |
1379 | error ("floating constant exponent has no digits"); | |
1380 | while (isdigit (c)) | |
1381 | { | |
1382 | if (p >= token_buffer + maxtoken - 3) | |
1383 | p = extend_token_buffer (p); | |
1384 | *p++ = c; | |
1385 | c = getc (finput); | |
1386 | } | |
1387 | } | |
1388 | ||
1389 | *p = 0; | |
1390 | errno = 0; | |
1391 | ||
1392 | /* Convert string to a double, checking for overflow. */ | |
1393 | if (setjmp (handler)) | |
1394 | { | |
1395 | error ("floating constant out of range"); | |
1396 | value = dconst0; | |
1397 | } | |
1398 | else | |
1399 | { | |
1400 | set_float_handler (handler); | |
1454a5ba RS |
1401 | |
1402 | /* The second argument, machine_mode, of REAL_VALUE_ATOF tells the | |
1403 | desired precision of the binary result of decimal-to-binary conversion. */ | |
e8bbfc4e RK |
1404 | |
1405 | /* Read the suffixes to choose a data type. */ | |
63ea33ce RS |
1406 | switch (c) |
1407 | { | |
1408 | case 'f': case 'F': | |
1409 | type = float_type_node; | |
1454a5ba RS |
1410 | value = REAL_VALUE_ATOF (token_buffer, TYPE_MODE (type)); |
1411 | if (REAL_VALUE_ISINF (value) && pedantic) | |
63ea33ce RS |
1412 | pedwarn ("floating point number exceeds range of `float'"); |
1413 | garbage_chars = -1; | |
1414 | break; | |
1415 | ||
1416 | case 'l': case 'L': | |
1417 | type = long_double_type_node; | |
1454a5ba RS |
1418 | value = REAL_VALUE_ATOF (token_buffer, TYPE_MODE (type)); |
1419 | if (REAL_VALUE_ISINF (value) && pedantic) | |
1420 | pedwarn ( | |
1421 | "floating point number exceeds range of `long double'"); | |
63ea33ce RS |
1422 | garbage_chars = -1; |
1423 | break; | |
122026c0 RS |
1424 | |
1425 | case 'i': case 'I': | |
1426 | if (imag) | |
1427 | error ("more than one `i' or `j' in numeric constant"); | |
1428 | imag = 1; | |
1429 | garbage_chars = -1; | |
1454a5ba RS |
1430 | break; |
1431 | ||
1432 | default: | |
1433 | value = REAL_VALUE_ATOF (token_buffer, TYPE_MODE (type)); | |
1434 | if (REAL_VALUE_ISINF (value) && pedantic) | |
1435 | pedwarn ("floating point number exceeds range of `double'"); | |
63ea33ce | 1436 | } |
1454a5ba RS |
1437 | set_float_handler (NULL_PTR); |
1438 | } | |
1439 | #ifdef ERANGE | |
1440 | if (errno == ERANGE && !flag_traditional && pedantic) | |
1441 | { | |
1442 | /* ERANGE is also reported for underflow, | |
1443 | so test the value to distinguish overflow from that. */ | |
1444 | if (REAL_VALUES_LESS (dconst1, value) | |
1445 | || REAL_VALUES_LESS (value, dconstm1)) | |
1446 | { | |
1447 | pedwarn ("floating point number exceeds range of `double'"); | |
1448 | exceeds_double = 1; | |
1449 | } | |
1450 | } | |
1451 | #endif | |
63ea33ce | 1452 | /* Note: garbage_chars is -1 if first char is *not* garbage. */ |
f3acae4d RS |
1453 | while (isalnum (c) || c == '.' || c == '_' |
1454 | || (!flag_traditional && (c == '+' || c == '-') | |
1455 | && (p[-1] == 'e' || p[-1] == 'E'))) | |
e8bbfc4e | 1456 | { |
e8bbfc4e RK |
1457 | if (p >= token_buffer + maxtoken - 3) |
1458 | p = extend_token_buffer (p); | |
1459 | *p++ = c; | |
1460 | c = getc (finput); | |
63ea33ce | 1461 | garbage_chars++; |
e8bbfc4e | 1462 | } |
63ea33ce RS |
1463 | if (garbage_chars > 0) |
1464 | error ("garbage at end of number"); | |
e8bbfc4e RK |
1465 | |
1466 | /* Create a node with determined type and value. */ | |
122026c0 RS |
1467 | if (imag) |
1468 | yylval.ttype = build_complex (convert (type, integer_zero_node), | |
1469 | build_real (type, value)); | |
1470 | else | |
1471 | yylval.ttype = build_real (type, value); | |
e8bbfc4e RK |
1472 | |
1473 | ungetc (c, finput); | |
1474 | *p = 0; | |
1475 | } | |
1476 | else | |
1477 | { | |
1478 | tree traditional_type, ansi_type, type; | |
8d9bfdc5 | 1479 | HOST_WIDE_INT high, low; |
e8bbfc4e RK |
1480 | int spec_unsigned = 0; |
1481 | int spec_long = 0; | |
1482 | int spec_long_long = 0; | |
122026c0 | 1483 | int spec_imag = 0; |
e8bbfc4e RK |
1484 | int bytes, warn, i; |
1485 | ||
1486 | while (1) | |
1487 | { | |
1488 | if (c == 'u' || c == 'U') | |
1489 | { | |
1490 | if (spec_unsigned) | |
1491 | error ("two `u's in integer constant"); | |
1492 | spec_unsigned = 1; | |
1493 | } | |
1494 | else if (c == 'l' || c == 'L') | |
1495 | { | |
1496 | if (spec_long) | |
1497 | { | |
1498 | if (spec_long_long) | |
1499 | error ("three `l's in integer constant"); | |
1500 | else if (pedantic) | |
1501 | pedwarn ("ANSI C forbids long long integer constants"); | |
1502 | spec_long_long = 1; | |
1503 | } | |
1504 | spec_long = 1; | |
1505 | } | |
122026c0 RS |
1506 | else if (c == 'i' || c == 'j' || c == 'I' || c == 'J') |
1507 | { | |
1508 | if (spec_imag) | |
1509 | error ("more than one `i' or `j' in numeric constant"); | |
1510 | spec_imag = 1; | |
1511 | } | |
e8bbfc4e RK |
1512 | else |
1513 | { | |
f3acae4d RS |
1514 | if (isalnum (c) || c == '.' || c == '_' |
1515 | || (!flag_traditional && (c == '+' || c == '-') | |
1516 | && (p[-1] == 'e' || p[-1] == 'E'))) | |
e8bbfc4e RK |
1517 | { |
1518 | error ("garbage at end of number"); | |
f3acae4d RS |
1519 | while (isalnum (c) || c == '.' || c == '_' |
1520 | || (!flag_traditional && (c == '+' || c == '-') | |
1521 | && (p[-1] == 'e' || p[-1] == 'E'))) | |
e8bbfc4e RK |
1522 | { |
1523 | if (p >= token_buffer + maxtoken - 3) | |
1524 | p = extend_token_buffer (p); | |
1525 | *p++ = c; | |
1526 | c = getc (finput); | |
1527 | } | |
1528 | } | |
1529 | break; | |
1530 | } | |
1531 | if (p >= token_buffer + maxtoken - 3) | |
1532 | p = extend_token_buffer (p); | |
1533 | *p++ = c; | |
1534 | c = getc (finput); | |
1535 | } | |
1536 | ||
1537 | ungetc (c, finput); | |
1538 | ||
1539 | /* If the constant is not long long and it won't fit in an | |
1540 | unsigned long, or if the constant is long long and won't fit | |
1541 | in an unsigned long long, then warn that the constant is out | |
1542 | of range. */ | |
1543 | ||
1544 | /* ??? This assumes that long long and long integer types are | |
1545 | a multiple of 8 bits. This better than the original code | |
1546 | though which assumed that long was exactly 32 bits and long | |
1547 | long was exactly 64 bits. */ | |
1548 | ||
1549 | if (spec_long_long) | |
1550 | bytes = TYPE_PRECISION (long_long_integer_type_node) / 8; | |
1551 | else | |
1552 | bytes = TYPE_PRECISION (long_integer_type_node) / 8; | |
1553 | ||
4ca827d0 RS |
1554 | warn = overflow; |
1555 | for (i = bytes; i < TOTAL_PARTS; i++) | |
1556 | if (parts[i]) | |
1557 | warn = 1; | |
1558 | if (warn) | |
1559 | pedwarn ("integer constant out of range"); | |
e8bbfc4e RK |
1560 | |
1561 | /* This is simplified by the fact that our constant | |
1562 | is always positive. */ | |
8d9bfdc5 RK |
1563 | |
1564 | high = low = 0; | |
1565 | ||
1566 | for (i = 0; i < HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR; i++) | |
1567 | { | |
1568 | high |= ((HOST_WIDE_INT) parts[i + (HOST_BITS_PER_WIDE_INT | |
1569 | / HOST_BITS_PER_CHAR)] | |
1570 | << (i * HOST_BITS_PER_CHAR)); | |
1571 | low |= (HOST_WIDE_INT) parts[i] << (i * HOST_BITS_PER_CHAR); | |
1572 | } | |
1573 | ||
1574 | yylval.ttype = build_int_2 (low, high); | |
5a9085c7 | 1575 | TREE_TYPE (yylval.ttype) = long_long_unsigned_type_node; |
e8bbfc4e | 1576 | |
e8bbfc4e RK |
1577 | /* If warn_traditional, calculate both the ANSI type and the |
1578 | traditional type, then see if they disagree. | |
1579 | Otherwise, calculate only the type for the dialect in use. */ | |
1580 | if (warn_traditional || flag_traditional) | |
1581 | { | |
1582 | /* Calculate the traditional type. */ | |
1583 | /* Traditionally, any constant is signed; | |
1584 | but if unsigned is specified explicitly, obey that. | |
1585 | Use the smallest size with the right number of bits, | |
1586 | except for one special case with decimal constants. */ | |
1587 | if (! spec_long && base != 10 | |
1588 | && int_fits_type_p (yylval.ttype, unsigned_type_node)) | |
1589 | traditional_type = (spec_unsigned ? unsigned_type_node | |
1590 | : integer_type_node); | |
1591 | /* A decimal constant must be long | |
1592 | if it does not fit in type int. | |
1593 | I think this is independent of whether | |
1594 | the constant is signed. */ | |
1595 | else if (! spec_long && base == 10 | |
1596 | && int_fits_type_p (yylval.ttype, integer_type_node)) | |
1597 | traditional_type = (spec_unsigned ? unsigned_type_node | |
1598 | : integer_type_node); | |
4ca827d0 | 1599 | else if (! spec_long_long) |
e8bbfc4e RK |
1600 | traditional_type = (spec_unsigned ? long_unsigned_type_node |
1601 | : long_integer_type_node); | |
1602 | else | |
1603 | traditional_type = (spec_unsigned | |
1604 | ? long_long_unsigned_type_node | |
1605 | : long_long_integer_type_node); | |
1606 | } | |
1607 | if (warn_traditional || ! flag_traditional) | |
1608 | { | |
1609 | /* Calculate the ANSI type. */ | |
1610 | if (! spec_long && ! spec_unsigned | |
1611 | && int_fits_type_p (yylval.ttype, integer_type_node)) | |
1612 | ansi_type = integer_type_node; | |
1613 | else if (! spec_long && (base != 10 || spec_unsigned) | |
1614 | && int_fits_type_p (yylval.ttype, unsigned_type_node)) | |
1615 | ansi_type = unsigned_type_node; | |
1616 | else if (! spec_unsigned && !spec_long_long | |
1617 | && int_fits_type_p (yylval.ttype, long_integer_type_node)) | |
1618 | ansi_type = long_integer_type_node; | |
4ca827d0 | 1619 | else if (! spec_long_long) |
e8bbfc4e RK |
1620 | ansi_type = long_unsigned_type_node; |
1621 | else if (! spec_unsigned | |
a120b788 RS |
1622 | /* Verify value does not overflow into sign bit. */ |
1623 | && TREE_INT_CST_HIGH (yylval.ttype) >= 0 | |
e8bbfc4e RK |
1624 | && int_fits_type_p (yylval.ttype, |
1625 | long_long_integer_type_node)) | |
1626 | ansi_type = long_long_integer_type_node; | |
1627 | else | |
1628 | ansi_type = long_long_unsigned_type_node; | |
1629 | } | |
1630 | ||
1631 | type = flag_traditional ? traditional_type : ansi_type; | |
1632 | ||
1633 | if (warn_traditional && traditional_type != ansi_type) | |
1634 | { | |
1635 | if (TYPE_PRECISION (traditional_type) | |
1636 | != TYPE_PRECISION (ansi_type)) | |
1637 | warning ("width of integer constant changes with -traditional"); | |
1638 | else if (TREE_UNSIGNED (traditional_type) | |
1639 | != TREE_UNSIGNED (ansi_type)) | |
1640 | warning ("integer constant is unsigned in ANSI C, signed with -traditional"); | |
a3ee5899 JW |
1641 | else |
1642 | warning ("width of integer constant may change on other systems with -traditional"); | |
e8bbfc4e | 1643 | } |
e8bbfc4e | 1644 | |
4ca827d0 RS |
1645 | if (!flag_traditional && !int_fits_type_p (yylval.ttype, type) |
1646 | && !warn) | |
88d92ca5 RS |
1647 | pedwarn ("integer constant out of range"); |
1648 | ||
c832a30e | 1649 | if (base == 10 && ! spec_unsigned && TREE_UNSIGNED (type)) |
ba99333a | 1650 | warning ("decimal constant is so large that it is unsigned"); |
c832a30e | 1651 | |
122026c0 RS |
1652 | if (spec_imag) |
1653 | { | |
1654 | if (TYPE_PRECISION (type) | |
1655 | <= TYPE_PRECISION (integer_type_node)) | |
1656 | yylval.ttype | |
1657 | = build_complex (integer_zero_node, | |
1658 | convert (integer_type_node, yylval.ttype)); | |
1659 | else | |
1660 | error ("complex integer constant is too wide for `complex int'"); | |
1661 | } | |
1662 | else if (flag_traditional && !int_fits_type_p (yylval.ttype, type)) | |
88dd95c1 RS |
1663 | /* The traditional constant 0x80000000 is signed |
1664 | but doesn't fit in the range of int. | |
1665 | This will change it to -0x80000000, which does fit. */ | |
1666 | { | |
1667 | TREE_TYPE (yylval.ttype) = unsigned_type (type); | |
1668 | yylval.ttype = convert (type, yylval.ttype); | |
1669 | } | |
1670 | else | |
1671 | TREE_TYPE (yylval.ttype) = type; | |
1672 | ||
e8bbfc4e RK |
1673 | *p = 0; |
1674 | } | |
1675 | ||
1676 | value = CONSTANT; break; | |
1677 | } | |
1678 | ||
1679 | case '\'': | |
1680 | char_constant: | |
1681 | { | |
1682 | register int result = 0; | |
a2543283 | 1683 | register int num_chars = 0; |
e8bbfc4e RK |
1684 | unsigned width = TYPE_PRECISION (char_type_node); |
1685 | int max_chars; | |
1686 | ||
1687 | if (wide_flag) | |
1688 | { | |
1689 | width = WCHAR_TYPE_SIZE; | |
1690 | #ifdef MULTIBYTE_CHARS | |
1691 | max_chars = MB_CUR_MAX; | |
1692 | #else | |
1693 | max_chars = 1; | |
1694 | #endif | |
1695 | } | |
1696 | else | |
1697 | max_chars = TYPE_PRECISION (integer_type_node) / width; | |
1698 | ||
1699 | while (1) | |
1700 | { | |
1701 | tryagain: | |
1702 | ||
1703 | c = getc (finput); | |
1704 | ||
1705 | if (c == '\'' || c == EOF) | |
1706 | break; | |
1707 | ||
1708 | if (c == '\\') | |
1709 | { | |
b70af677 RS |
1710 | int ignore = 0; |
1711 | c = readescape (&ignore); | |
1712 | if (ignore) | |
e8bbfc4e RK |
1713 | goto tryagain; |
1714 | if (width < HOST_BITS_PER_INT | |
1715 | && (unsigned) c >= (1 << width)) | |
1716 | pedwarn ("escape sequence out of range for character"); | |
1717 | } | |
1718 | else if (c == '\n') | |
1719 | { | |
1720 | if (pedantic) | |
1721 | pedwarn ("ANSI C forbids newline in character constant"); | |
1722 | lineno++; | |
1723 | } | |
1724 | ||
1725 | num_chars++; | |
1726 | if (num_chars > maxtoken - 4) | |
1727 | extend_token_buffer (token_buffer); | |
1728 | ||
1729 | token_buffer[num_chars] = c; | |
1730 | ||
1731 | /* Merge character into result; ignore excess chars. */ | |
1732 | if (num_chars < max_chars + 1) | |
1733 | { | |
1734 | if (width < HOST_BITS_PER_INT) | |
1735 | result = (result << width) | (c & ((1 << width) - 1)); | |
1736 | else | |
1737 | result = c; | |
1738 | } | |
1739 | } | |
1740 | ||
1741 | token_buffer[num_chars + 1] = '\''; | |
1742 | token_buffer[num_chars + 2] = 0; | |
1743 | ||
1744 | if (c != '\'') | |
1745 | error ("malformatted character constant"); | |
1746 | else if (num_chars == 0) | |
1747 | error ("empty character constant"); | |
1748 | else if (num_chars > max_chars) | |
1749 | { | |
1750 | num_chars = max_chars; | |
1751 | error ("character constant too long"); | |
1752 | } | |
1753 | else if (num_chars != 1 && ! flag_traditional) | |
1754 | warning ("multi-character character constant"); | |
1755 | ||
1756 | /* If char type is signed, sign-extend the constant. */ | |
1757 | if (! wide_flag) | |
1758 | { | |
1759 | int num_bits = num_chars * width; | |
1760 | if (TREE_UNSIGNED (char_type_node) | |
1761 | || ((result >> (num_bits - 1)) & 1) == 0) | |
1762 | yylval.ttype | |
8d9bfdc5 RK |
1763 | = build_int_2 (result & ((unsigned HOST_WIDE_INT) ~0 |
1764 | >> (HOST_BITS_PER_WIDE_INT - num_bits)), | |
e8bbfc4e RK |
1765 | 0); |
1766 | else | |
1767 | yylval.ttype | |
8d9bfdc5 RK |
1768 | = build_int_2 (result | ~((unsigned HOST_WIDE_INT) ~0 |
1769 | >> (HOST_BITS_PER_WIDE_INT - num_bits)), | |
e8bbfc4e | 1770 | -1); |
f3acae4d | 1771 | TREE_TYPE (yylval.ttype) = integer_type_node; |
e8bbfc4e RK |
1772 | } |
1773 | else | |
1774 | { | |
1775 | #ifdef MULTIBYTE_CHARS | |
1776 | /* Set the initial shift state and convert the next sequence. */ | |
1777 | result = 0; | |
1778 | /* In all locales L'\0' is zero and mbtowc will return zero, | |
1779 | so don't use it. */ | |
1780 | if (num_chars > 1 | |
1781 | || (num_chars == 1 && token_buffer[1] != '\0')) | |
1782 | { | |
1783 | wchar_t wc; | |
8d9bfdc5 | 1784 | (void) mbtowc (NULL_PTR, NULL_PTR, 0); |
e8bbfc4e RK |
1785 | if (mbtowc (& wc, token_buffer + 1, num_chars) == num_chars) |
1786 | result = wc; | |
1787 | else | |
1788 | warning ("Ignoring invalid multibyte character"); | |
1789 | } | |
1790 | #endif | |
1791 | yylval.ttype = build_int_2 (result, 0); | |
f3acae4d | 1792 | TREE_TYPE (yylval.ttype) = wchar_type_node; |
e8bbfc4e RK |
1793 | } |
1794 | ||
e8bbfc4e RK |
1795 | value = CONSTANT; |
1796 | break; | |
1797 | } | |
1798 | ||
1799 | case '"': | |
1800 | string_constant: | |
1801 | { | |
1802 | c = getc (finput); | |
1803 | p = token_buffer + 1; | |
1804 | ||
1805 | while (c != '"' && c >= 0) | |
1806 | { | |
1807 | /* ignore_escape_flag is set for reading the filename in #line. */ | |
1808 | if (!ignore_escape_flag && c == '\\') | |
1809 | { | |
fad04099 | 1810 | int ignore = 0; |
b70af677 RS |
1811 | c = readescape (&ignore); |
1812 | if (ignore) | |
e8bbfc4e RK |
1813 | goto skipnewline; |
1814 | if (!wide_flag | |
1815 | && TYPE_PRECISION (char_type_node) < HOST_BITS_PER_INT | |
1816 | && c >= (1 << TYPE_PRECISION (char_type_node))) | |
1817 | pedwarn ("escape sequence out of range for character"); | |
1818 | } | |
1819 | else if (c == '\n') | |
1820 | { | |
1821 | if (pedantic) | |
1822 | pedwarn ("ANSI C forbids newline in string constant"); | |
1823 | lineno++; | |
1824 | } | |
1825 | ||
1826 | if (p == token_buffer + maxtoken) | |
1827 | p = extend_token_buffer (p); | |
1828 | *p++ = c; | |
1829 | ||
1830 | skipnewline: | |
1831 | c = getc (finput); | |
1832 | } | |
1833 | *p = 0; | |
1834 | ||
1835 | /* We have read the entire constant. | |
1836 | Construct a STRING_CST for the result. */ | |
1837 | ||
1838 | if (wide_flag) | |
1839 | { | |
1840 | /* If this is a L"..." wide-string, convert the multibyte string | |
1841 | to a wide character string. */ | |
1842 | char *widep = (char *) alloca ((p - token_buffer) * WCHAR_BYTES); | |
1843 | int len; | |
1844 | ||
1845 | #ifdef MULTIBYTE_CHARS | |
1846 | len = mbstowcs ((wchar_t *) widep, token_buffer + 1, p - token_buffer); | |
1847 | if ((unsigned) len >= (p - token_buffer)) | |
1848 | { | |
1849 | warning ("Ignoring invalid multibyte string"); | |
1850 | len = 0; | |
1851 | } | |
1852 | bzero (widep + (len * WCHAR_BYTES), WCHAR_BYTES); | |
1853 | #else | |
1854 | { | |
1855 | union { long l; char c[sizeof (long)]; } u; | |
1856 | int big_endian; | |
1857 | char *wp, *cp; | |
1858 | ||
1859 | /* Determine whether host is little or big endian. */ | |
1860 | u.l = 1; | |
1861 | big_endian = u.c[sizeof (long) - 1]; | |
1862 | wp = widep + (big_endian ? WCHAR_BYTES - 1 : 0); | |
1863 | ||
1864 | bzero (widep, (p - token_buffer) * WCHAR_BYTES); | |
1865 | for (cp = token_buffer + 1; cp < p; cp++) | |
1866 | *wp = *cp, wp += WCHAR_BYTES; | |
1867 | len = p - token_buffer - 1; | |
1868 | } | |
1869 | #endif | |
1870 | yylval.ttype = build_string ((len + 1) * WCHAR_BYTES, widep); | |
1871 | TREE_TYPE (yylval.ttype) = wchar_array_type_node; | |
1872 | } | |
1873 | else | |
1874 | { | |
1875 | yylval.ttype = build_string (p - token_buffer, token_buffer + 1); | |
1876 | TREE_TYPE (yylval.ttype) = char_array_type_node; | |
1877 | } | |
1878 | ||
1879 | *p++ = '"'; | |
1880 | *p = 0; | |
1881 | ||
1882 | value = STRING; break; | |
1883 | } | |
1884 | ||
1885 | case '+': | |
1886 | case '-': | |
1887 | case '&': | |
1888 | case '|': | |
1889 | case '<': | |
1890 | case '>': | |
1891 | case '*': | |
1892 | case '/': | |
1893 | case '%': | |
1894 | case '^': | |
1895 | case '!': | |
1896 | case '=': | |
1897 | { | |
1898 | register int c1; | |
1899 | ||
1900 | combine: | |
1901 | ||
1902 | switch (c) | |
1903 | { | |
1904 | case '+': | |
1905 | yylval.code = PLUS_EXPR; break; | |
1906 | case '-': | |
1907 | yylval.code = MINUS_EXPR; break; | |
1908 | case '&': | |
1909 | yylval.code = BIT_AND_EXPR; break; | |
1910 | case '|': | |
1911 | yylval.code = BIT_IOR_EXPR; break; | |
1912 | case '*': | |
1913 | yylval.code = MULT_EXPR; break; | |
1914 | case '/': | |
1915 | yylval.code = TRUNC_DIV_EXPR; break; | |
1916 | case '%': | |
1917 | yylval.code = TRUNC_MOD_EXPR; break; | |
1918 | case '^': | |
1919 | yylval.code = BIT_XOR_EXPR; break; | |
1920 | case LSHIFT: | |
1921 | yylval.code = LSHIFT_EXPR; break; | |
1922 | case RSHIFT: | |
1923 | yylval.code = RSHIFT_EXPR; break; | |
1924 | case '<': | |
1925 | yylval.code = LT_EXPR; break; | |
1926 | case '>': | |
1927 | yylval.code = GT_EXPR; break; | |
1928 | } | |
1929 | ||
1930 | token_buffer[1] = c1 = getc (finput); | |
1931 | token_buffer[2] = 0; | |
1932 | ||
1933 | if (c1 == '=') | |
1934 | { | |
1935 | switch (c) | |
1936 | { | |
1937 | case '<': | |
1938 | value = ARITHCOMPARE; yylval.code = LE_EXPR; goto done; | |
1939 | case '>': | |
1940 | value = ARITHCOMPARE; yylval.code = GE_EXPR; goto done; | |
1941 | case '!': | |
1942 | value = EQCOMPARE; yylval.code = NE_EXPR; goto done; | |
1943 | case '=': | |
1944 | value = EQCOMPARE; yylval.code = EQ_EXPR; goto done; | |
1945 | } | |
1946 | value = ASSIGN; goto done; | |
1947 | } | |
1948 | else if (c == c1) | |
1949 | switch (c) | |
1950 | { | |
1951 | case '+': | |
1952 | value = PLUSPLUS; goto done; | |
1953 | case '-': | |
1954 | value = MINUSMINUS; goto done; | |
1955 | case '&': | |
1956 | value = ANDAND; goto done; | |
1957 | case '|': | |
1958 | value = OROR; goto done; | |
1959 | case '<': | |
1960 | c = LSHIFT; | |
1961 | goto combine; | |
1962 | case '>': | |
1963 | c = RSHIFT; | |
1964 | goto combine; | |
1965 | } | |
1966 | else if ((c == '-') && (c1 == '>')) | |
1967 | { value = POINTSAT; goto done; } | |
1968 | ungetc (c1, finput); | |
1969 | token_buffer[1] = 0; | |
1970 | ||
1971 | if ((c == '<') || (c == '>')) | |
1972 | value = ARITHCOMPARE; | |
1973 | else value = c; | |
1974 | goto done; | |
1975 | } | |
1976 | ||
1977 | case 0: | |
1978 | /* Don't make yyparse think this is eof. */ | |
1979 | value = 1; | |
1980 | break; | |
1981 | ||
1982 | default: | |
1983 | value = c; | |
1984 | } | |
1985 | ||
1986 | done: | |
1987 | /* yylloc.last_line = lineno; */ | |
1988 | ||
1989 | return value; | |
1990 | } | |
1991 | ||
d45cf215 | 1992 | /* Sets the value of the 'yydebug' variable to VALUE. |
e8bbfc4e RK |
1993 | This is a function so we don't have to have YYDEBUG defined |
1994 | in order to build the compiler. */ | |
1995 | ||
1996 | void | |
1997 | set_yydebug (value) | |
1998 | int value; | |
1999 | { | |
2000 | #if YYDEBUG != 0 | |
2001 | yydebug = value; | |
2002 | #else | |
2003 | warning ("YYDEBUG not defined."); | |
2004 | #endif | |
2005 | } |