]>
Commit | Line | Data |
---|---|---|
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 | ||
99 | #define TOTAL_KEYWORDS 53 | |
100 | #define MIN_WORD_LENGTH 2 | |
101 | #define MAX_WORD_LENGTH 13 | |
102 | #define MIN_HASH_VALUE 7 | |
103 | #define MAX_HASH_VALUE 102 | |
104 | /* maximum key range = 96, duplicates = 0 */ | |
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 | { | |
116 | 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, | |
117 | 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, | |
118 | 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, | |
119 | 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, | |
120 | 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, | |
121 | 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, | |
122 | 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, | |
123 | 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, | |
124 | 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, | |
125 | 103, 103, 103, 103, 103, 1, 103, 2, 1, 24, | |
126 | 1, 5, 19, 39, 16, 13, 103, 1, 25, 1, | |
127 | 34, 34, 24, 103, 13, 12, 1, 45, 24, 7, | |
128 | 103, 103, 2, 103, 103, 103, 103, 103, | |
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 | { | |
154 | {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, | |
d45cf215 | 155 | {"asm", ASM_KEYWORD, NORID}, |
e8bbfc4e | 156 | {"",}, |
d45cf215 | 157 | {"__asm", ASM_KEYWORD, NORID}, |
e8bbfc4e | 158 | {"",}, |
d45cf215 | 159 | {"__asm__", ASM_KEYWORD, NORID}, |
e8bbfc4e RK |
160 | {"break", BREAK, NORID}, |
161 | {"__typeof__", TYPEOF, NORID}, | |
162 | {"",}, | |
163 | {"__alignof__", ALIGNOF, NORID}, | |
164 | {"",}, | |
165 | {"__attribute__", ATTRIBUTE, NORID}, | |
166 | {"int", TYPESPEC, RID_INT}, | |
167 | {"__attribute", ATTRIBUTE, NORID}, | |
168 | {"__extension__", EXTENSION, NORID}, | |
169 | {"",}, | |
170 | {"__signed", TYPESPEC, RID_SIGNED}, | |
171 | {"",}, | |
172 | {"__signed__", TYPESPEC, RID_SIGNED}, | |
173 | {"__inline__", SCSPEC, RID_INLINE}, | |
174 | {"else", ELSE, NORID}, | |
175 | {"__inline", SCSPEC, RID_INLINE}, | |
176 | {"default", DEFAULT, NORID}, | |
177 | {"__typeof", TYPEOF, NORID}, | |
178 | {"while", WHILE, NORID}, | |
179 | {"__alignof", ALIGNOF, NORID}, | |
180 | {"struct", STRUCT, NORID}, | |
181 | {"__const", TYPE_QUAL, RID_CONST}, | |
182 | {"if", IF, NORID}, | |
183 | {"__const__", TYPE_QUAL, RID_CONST}, | |
184 | {"__label__", LABEL, NORID}, | |
185 | {"do", DO, NORID}, | |
186 | {"__volatile__", TYPE_QUAL, RID_VOLATILE}, | |
187 | {"sizeof", SIZEOF, NORID}, | |
188 | {"__volatile", TYPE_QUAL, RID_VOLATILE}, | |
189 | {"auto", SCSPEC, RID_AUTO}, | |
190 | {"void", TYPESPEC, RID_VOID}, | |
191 | {"char", TYPESPEC, RID_CHAR}, | |
192 | {"static", SCSPEC, RID_STATIC}, | |
193 | {"case", CASE, NORID}, | |
194 | {"extern", SCSPEC, RID_EXTERN}, | |
195 | {"switch", SWITCH, NORID}, | |
196 | {"for", FOR, NORID}, | |
197 | {"inline", SCSPEC, RID_INLINE}, | |
198 | {"typeof", TYPEOF, NORID}, | |
199 | {"typedef", SCSPEC, RID_TYPEDEF}, | |
200 | {"short", TYPESPEC, RID_SHORT}, | |
201 | {"",}, | |
202 | {"return", RETURN, NORID}, | |
203 | {"enum", ENUM, NORID}, | |
204 | {"",}, | |
205 | {"double", TYPESPEC, RID_DOUBLE}, | |
206 | {"signed", TYPESPEC, RID_SIGNED}, | |
207 | {"float", TYPESPEC, RID_FLOAT}, | |
208 | {"",}, {"",}, | |
209 | {"volatile", TYPE_QUAL, RID_VOLATILE}, | |
210 | {"",}, | |
211 | {"const", TYPE_QUAL, RID_CONST}, | |
212 | {"",}, | |
213 | {"unsigned", TYPESPEC, RID_UNSIGNED}, | |
214 | {"",}, {"",}, {"",}, {"",}, | |
215 | {"continue", CONTINUE, NORID}, | |
216 | {"",}, | |
217 | {"register", SCSPEC, RID_REGISTER}, | |
218 | {"",}, {"",}, {"",}, {"",}, | |
219 | {"goto", GOTO, NORID}, | |
220 | {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, | |
221 | {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, | |
222 | ||
223 | {"union", UNION, NORID}, | |
224 | {"",}, {"",}, {"",}, {"",}, | |
225 | {"long", TYPESPEC, RID_LONG}, | |
226 | }; | |
227 | ||
228 | if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH) | |
229 | { | |
230 | register int key = hash (str, len); | |
231 | ||
232 | if (key <= MAX_HASH_VALUE && key >= 0) | |
233 | { | |
234 | register char *s = wordlist[key].name; | |
235 | ||
236 | if (*s == *str && !strcmp (str + 1, s + 1)) | |
237 | return &wordlist[key]; | |
238 | } | |
239 | } | |
240 | return 0; | |
241 | } | |
242 | \f | |
243 | /* Return something to represent absolute declarators containing a *. | |
244 | TARGET is the absolute declarator that the * contains. | |
245 | TYPE_QUALS is a list of modifiers such as const or volatile | |
246 | to apply to the pointer type, represented as identifiers. | |
247 | ||
248 | We return an INDIRECT_REF whose "contents" are TARGET | |
249 | and whose type is the modifier list. */ | |
250 | ||
251 | tree | |
252 | make_pointer_declarator (type_quals, target) | |
253 | tree type_quals, target; | |
254 | { | |
255 | return build1 (INDIRECT_REF, type_quals, target); | |
256 | } | |
257 | \f | |
258 | void | |
259 | init_lex () | |
260 | { | |
261 | /* Make identifier nodes long enough for the language-specific slots. */ | |
262 | set_identifier_size (sizeof (struct lang_identifier)); | |
263 | ||
264 | /* Start it at 0, because check_newline is called at the very beginning | |
265 | and will increment it to 1. */ | |
266 | lineno = 0; | |
267 | ||
268 | #ifdef MULTIBYTE_CHARS | |
269 | /* Change to the native locale for multibyte conversions. */ | |
270 | setlocale (LC_CTYPE, ""); | |
271 | #endif | |
272 | ||
273 | maxtoken = 40; | |
274 | token_buffer = (char *) xmalloc (maxtoken + 2); | |
275 | ||
276 | ridpointers[(int) RID_INT] = get_identifier ("int"); | |
277 | ridpointers[(int) RID_CHAR] = get_identifier ("char"); | |
278 | ridpointers[(int) RID_VOID] = get_identifier ("void"); | |
279 | ridpointers[(int) RID_FLOAT] = get_identifier ("float"); | |
280 | ridpointers[(int) RID_DOUBLE] = get_identifier ("double"); | |
281 | ridpointers[(int) RID_SHORT] = get_identifier ("short"); | |
282 | ridpointers[(int) RID_LONG] = get_identifier ("long"); | |
283 | ridpointers[(int) RID_UNSIGNED] = get_identifier ("unsigned"); | |
284 | ridpointers[(int) RID_SIGNED] = get_identifier ("signed"); | |
285 | ridpointers[(int) RID_INLINE] = get_identifier ("inline"); | |
286 | ridpointers[(int) RID_CONST] = get_identifier ("const"); | |
287 | ridpointers[(int) RID_VOLATILE] = get_identifier ("volatile"); | |
288 | ridpointers[(int) RID_AUTO] = get_identifier ("auto"); | |
289 | ridpointers[(int) RID_STATIC] = get_identifier ("static"); | |
290 | ridpointers[(int) RID_EXTERN] = get_identifier ("extern"); | |
291 | ridpointers[(int) RID_TYPEDEF] = get_identifier ("typedef"); | |
292 | ridpointers[(int) RID_REGISTER] = get_identifier ("register"); | |
293 | ||
294 | /* Some options inhibit certain reserved words. | |
295 | Clear those words out of the hash table so they won't be recognized. */ | |
296 | #define UNSET_RESERVED_WORD(STRING) \ | |
297 | do { struct resword *s = is_reserved_word (STRING, sizeof (STRING) - 1); \ | |
298 | if (s) s->name = ""; } while (0) | |
299 | ||
300 | if (flag_traditional) | |
301 | { | |
302 | UNSET_RESERVED_WORD ("const"); | |
303 | UNSET_RESERVED_WORD ("volatile"); | |
304 | UNSET_RESERVED_WORD ("typeof"); | |
305 | UNSET_RESERVED_WORD ("signed"); | |
306 | UNSET_RESERVED_WORD ("inline"); | |
307 | } | |
308 | if (flag_no_asm) | |
309 | { | |
310 | UNSET_RESERVED_WORD ("asm"); | |
311 | UNSET_RESERVED_WORD ("typeof"); | |
312 | UNSET_RESERVED_WORD ("inline"); | |
313 | } | |
314 | } | |
315 | ||
316 | void | |
317 | reinit_parse_for_function () | |
318 | { | |
319 | } | |
320 | \f | |
321 | /* Function used when yydebug is set, to print a token in more detail. */ | |
322 | ||
323 | void | |
324 | yyprint (file, yychar, yylval) | |
325 | FILE *file; | |
326 | int yychar; | |
327 | YYSTYPE yylval; | |
328 | { | |
329 | tree t; | |
330 | switch (yychar) | |
331 | { | |
332 | case IDENTIFIER: | |
333 | case TYPENAME: | |
334 | t = yylval.ttype; | |
335 | if (IDENTIFIER_POINTER (t)) | |
336 | fprintf (file, " `%s'", IDENTIFIER_POINTER (t)); | |
337 | break; | |
338 | ||
339 | case CONSTANT: | |
340 | t = yylval.ttype; | |
341 | if (TREE_CODE (t) == INTEGER_CST) | |
342 | fprintf (file, " 0x%8x%8x", TREE_INT_CST_HIGH (t), | |
343 | TREE_INT_CST_LOW (t)); | |
344 | break; | |
345 | } | |
346 | } | |
347 | ||
348 | \f | |
349 | /* If C is not whitespace, return C. | |
350 | Otherwise skip whitespace and return first nonwhite char read. */ | |
351 | ||
352 | static int | |
353 | skip_white_space (c) | |
354 | register int c; | |
355 | { | |
0dcd8cee | 356 | static int newline_warning = 0; |
e8bbfc4e RK |
357 | |
358 | for (;;) | |
359 | { | |
360 | switch (c) | |
361 | { | |
0dcd8cee RS |
362 | /* We don't recognize comments here, because |
363 | cpp output can include / and * consecutively as operators. | |
364 | Also, there's no need, since cpp removes all comments. */ | |
e8bbfc4e RK |
365 | |
366 | case '\n': | |
367 | c = check_newline (); | |
368 | break; | |
369 | ||
370 | case ' ': | |
371 | case '\t': | |
372 | case '\f': | |
e8bbfc4e RK |
373 | case '\v': |
374 | case '\b': | |
375 | c = getc (finput); | |
376 | break; | |
377 | ||
0dcd8cee RS |
378 | case '\r': |
379 | /* ANSI C says the effects of a carriage return in a source file | |
380 | are undefined. */ | |
381 | if (pedantic && !newline_warning) | |
382 | { | |
383 | warning ("carriage return in source file"); | |
384 | warning ("(we only warn about the first carriage return)"); | |
385 | newline_warning = 1; | |
386 | } | |
387 | c = getc (finput); | |
388 | break; | |
389 | ||
e8bbfc4e RK |
390 | case '\\': |
391 | c = getc (finput); | |
392 | if (c == '\n') | |
393 | lineno++; | |
394 | else | |
395 | error ("stray '\\' in program"); | |
396 | c = getc (finput); | |
397 | break; | |
398 | ||
399 | default: | |
400 | return (c); | |
401 | } | |
402 | } | |
403 | } | |
404 | ||
405 | /* Skips all of the white space at the current location in the input file. | |
406 | Must use and reset nextchar if it has the next character. */ | |
407 | ||
408 | void | |
409 | position_after_white_space () | |
410 | { | |
411 | register int c; | |
412 | ||
413 | if (nextchar != -1) | |
414 | c = nextchar, nextchar = -1; | |
415 | else | |
416 | c = getc (finput); | |
417 | ||
418 | ungetc (skip_white_space (c), finput); | |
419 | } | |
420 | ||
421 | /* Make the token buffer longer, preserving the data in it. | |
422 | P should point to just beyond the last valid character in the old buffer. | |
423 | The value we return is a pointer to the new buffer | |
424 | at a place corresponding to P. */ | |
425 | ||
426 | static char * | |
427 | extend_token_buffer (p) | |
428 | char *p; | |
429 | { | |
430 | int offset = p - token_buffer; | |
431 | ||
432 | maxtoken = maxtoken * 2 + 10; | |
433 | token_buffer = (char *) xrealloc (token_buffer, maxtoken + 2); | |
434 | ||
435 | return token_buffer + offset; | |
436 | } | |
437 | \f | |
438 | /* At the beginning of a line, increment the line number | |
439 | and process any #-directive on this line. | |
440 | If the line is a #-directive, read the entire line and return a newline. | |
441 | Otherwise, return the line's first non-whitespace character. */ | |
442 | ||
443 | int | |
444 | check_newline () | |
445 | { | |
446 | register int c; | |
447 | register int token; | |
448 | ||
449 | lineno++; | |
450 | ||
451 | /* Read first nonwhite char on the line. */ | |
452 | ||
453 | c = getc (finput); | |
454 | while (c == ' ' || c == '\t') | |
455 | c = getc (finput); | |
456 | ||
457 | if (c != '#') | |
458 | { | |
459 | /* If not #, return it so caller will use it. */ | |
460 | return c; | |
461 | } | |
462 | ||
463 | /* Read first nonwhite char after the `#'. */ | |
464 | ||
465 | c = getc (finput); | |
466 | while (c == ' ' || c == '\t') | |
467 | c = getc (finput); | |
468 | ||
469 | /* If a letter follows, then if the word here is `line', skip | |
470 | it and ignore it; otherwise, ignore the line, with an error | |
471 | if the word isn't `pragma', `ident', `define', or `undef'. */ | |
472 | ||
473 | if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) | |
474 | { | |
475 | if (c == 'p') | |
476 | { | |
477 | if (getc (finput) == 'r' | |
478 | && getc (finput) == 'a' | |
479 | && getc (finput) == 'g' | |
480 | && getc (finput) == 'm' | |
481 | && getc (finput) == 'a' | |
482 | && ((c = getc (finput)) == ' ' || c == '\t' || c == '\n')) | |
483 | { | |
484 | #ifdef HANDLE_PRAGMA | |
485 | HANDLE_PRAGMA (finput); | |
486 | #endif /* HANDLE_PRAGMA */ | |
487 | goto skipline; | |
488 | } | |
489 | } | |
490 | ||
491 | else if (c == 'd') | |
492 | { | |
493 | if (getc (finput) == 'e' | |
494 | && getc (finput) == 'f' | |
495 | && getc (finput) == 'i' | |
496 | && getc (finput) == 'n' | |
497 | && getc (finput) == 'e' | |
498 | && ((c = getc (finput)) == ' ' || c == '\t' || c == '\n')) | |
499 | { | |
500 | #ifdef DWARF_DEBUGGING_INFO | |
501 | if ((debug_info_level == DINFO_LEVEL_VERBOSE) | |
502 | && (write_symbols == DWARF_DEBUG)) | |
503 | dwarfout_define (lineno, get_directive_line (finput)); | |
504 | #endif /* DWARF_DEBUGGING_INFO */ | |
505 | goto skipline; | |
506 | } | |
507 | } | |
508 | else if (c == 'u') | |
509 | { | |
510 | if (getc (finput) == 'n' | |
511 | && getc (finput) == 'd' | |
512 | && getc (finput) == 'e' | |
513 | && getc (finput) == 'f' | |
514 | && ((c = getc (finput)) == ' ' || c == '\t' || c == '\n')) | |
515 | { | |
516 | #ifdef DWARF_DEBUGGING_INFO | |
517 | if ((debug_info_level == DINFO_LEVEL_VERBOSE) | |
518 | && (write_symbols == DWARF_DEBUG)) | |
519 | dwarfout_undef (lineno, get_directive_line (finput)); | |
520 | #endif /* DWARF_DEBUGGING_INFO */ | |
521 | goto skipline; | |
522 | } | |
523 | } | |
524 | else if (c == 'l') | |
525 | { | |
526 | if (getc (finput) == 'i' | |
527 | && getc (finput) == 'n' | |
528 | && getc (finput) == 'e' | |
529 | && ((c = getc (finput)) == ' ' || c == '\t')) | |
530 | goto linenum; | |
531 | } | |
532 | else if (c == 'i') | |
533 | { | |
534 | if (getc (finput) == 'd' | |
535 | && getc (finput) == 'e' | |
536 | && getc (finput) == 'n' | |
537 | && getc (finput) == 't' | |
538 | && ((c = getc (finput)) == ' ' || c == '\t')) | |
539 | { | |
540 | /* #ident. The pedantic warning is now in cccp.c. */ | |
541 | ||
542 | /* Here we have just seen `#ident '. | |
543 | A string constant should follow. */ | |
544 | ||
545 | while (c == ' ' || c == '\t') | |
546 | c = getc (finput); | |
547 | ||
548 | /* If no argument, ignore the line. */ | |
549 | if (c == '\n') | |
550 | return c; | |
551 | ||
552 | ungetc (c, finput); | |
553 | token = yylex (); | |
554 | if (token != STRING | |
555 | || TREE_CODE (yylval.ttype) != STRING_CST) | |
556 | { | |
557 | error ("invalid #ident"); | |
558 | goto skipline; | |
559 | } | |
560 | ||
561 | if (!flag_no_ident) | |
562 | { | |
563 | #ifdef ASM_OUTPUT_IDENT | |
564 | ASM_OUTPUT_IDENT (asm_out_file, TREE_STRING_POINTER (yylval.ttype)); | |
565 | #endif | |
566 | } | |
567 | ||
568 | /* Skip the rest of this line. */ | |
569 | goto skipline; | |
570 | } | |
571 | } | |
572 | ||
573 | error ("undefined or invalid # directive"); | |
574 | goto skipline; | |
575 | } | |
576 | ||
577 | linenum: | |
578 | /* Here we have either `#line' or `# <nonletter>'. | |
579 | In either case, it should be a line number; a digit should follow. */ | |
580 | ||
581 | while (c == ' ' || c == '\t') | |
582 | c = getc (finput); | |
583 | ||
584 | /* If the # is the only nonwhite char on the line, | |
585 | just ignore it. Check the new newline. */ | |
586 | if (c == '\n') | |
587 | return c; | |
588 | ||
589 | /* Something follows the #; read a token. */ | |
590 | ||
591 | ungetc (c, finput); | |
592 | token = yylex (); | |
593 | ||
594 | if (token == CONSTANT | |
595 | && TREE_CODE (yylval.ttype) == INTEGER_CST) | |
596 | { | |
597 | int old_lineno = lineno; | |
598 | int used_up = 0; | |
599 | /* subtract one, because it is the following line that | |
600 | gets the specified number */ | |
601 | ||
602 | int l = TREE_INT_CST_LOW (yylval.ttype) - 1; | |
603 | ||
604 | /* Is this the last nonwhite stuff on the line? */ | |
605 | c = getc (finput); | |
606 | while (c == ' ' || c == '\t') | |
607 | c = getc (finput); | |
608 | if (c == '\n') | |
609 | { | |
610 | /* No more: store the line number and check following line. */ | |
611 | lineno = l; | |
612 | return c; | |
613 | } | |
614 | ungetc (c, finput); | |
615 | ||
616 | /* More follows: it must be a string constant (filename). */ | |
617 | ||
618 | /* Read the string constant, but don't treat \ as special. */ | |
619 | ignore_escape_flag = 1; | |
620 | token = yylex (); | |
621 | ignore_escape_flag = 0; | |
622 | ||
623 | if (token != STRING || TREE_CODE (yylval.ttype) != STRING_CST) | |
624 | { | |
625 | error ("invalid #line"); | |
626 | goto skipline; | |
627 | } | |
628 | ||
629 | input_filename | |
630 | = (char *) permalloc (TREE_STRING_LENGTH (yylval.ttype) + 1); | |
631 | strcpy (input_filename, TREE_STRING_POINTER (yylval.ttype)); | |
632 | lineno = l; | |
633 | ||
634 | /* Each change of file name | |
635 | reinitializes whether we are now in a system header. */ | |
636 | in_system_header = 0; | |
637 | ||
638 | if (main_input_filename == 0) | |
639 | main_input_filename = input_filename; | |
640 | ||
641 | /* Is this the last nonwhite stuff on the line? */ | |
642 | c = getc (finput); | |
643 | while (c == ' ' || c == '\t') | |
644 | c = getc (finput); | |
645 | if (c == '\n') | |
646 | return c; | |
647 | ungetc (c, finput); | |
648 | ||
649 | token = yylex (); | |
650 | used_up = 0; | |
651 | ||
652 | /* `1' after file name means entering new file. | |
653 | `2' after file name means just left a file. */ | |
654 | ||
655 | if (token == CONSTANT | |
656 | && TREE_CODE (yylval.ttype) == INTEGER_CST) | |
657 | { | |
658 | if (TREE_INT_CST_LOW (yylval.ttype) == 1) | |
659 | { | |
660 | /* Pushing to a new file. */ | |
661 | struct file_stack *p | |
662 | = (struct file_stack *) xmalloc (sizeof (struct file_stack)); | |
663 | input_file_stack->line = old_lineno; | |
664 | p->next = input_file_stack; | |
665 | p->name = input_filename; | |
666 | input_file_stack = p; | |
667 | input_file_stack_tick++; | |
668 | #ifdef DWARF_DEBUGGING_INFO | |
669 | if (debug_info_level == DINFO_LEVEL_VERBOSE | |
670 | && write_symbols == DWARF_DEBUG) | |
671 | dwarfout_start_new_source_file (input_filename); | |
672 | #endif /* DWARF_DEBUGGING_INFO */ | |
673 | ||
674 | used_up = 1; | |
675 | } | |
676 | else if (TREE_INT_CST_LOW (yylval.ttype) == 2) | |
677 | { | |
678 | /* Popping out of a file. */ | |
679 | if (input_file_stack->next) | |
680 | { | |
681 | struct file_stack *p = input_file_stack; | |
682 | input_file_stack = p->next; | |
683 | free (p); | |
684 | input_file_stack_tick++; | |
685 | #ifdef DWARF_DEBUGGING_INFO | |
686 | if (debug_info_level == DINFO_LEVEL_VERBOSE | |
687 | && write_symbols == DWARF_DEBUG) | |
688 | dwarfout_resume_previous_source_file (input_file_stack->line); | |
689 | #endif /* DWARF_DEBUGGING_INFO */ | |
690 | } | |
691 | else | |
692 | error ("#-lines for entering and leaving files don't match"); | |
693 | ||
694 | used_up = 1; | |
695 | } | |
696 | } | |
697 | ||
698 | /* If we have handled a `1' or a `2', | |
699 | see if there is another number to read. */ | |
700 | if (used_up) | |
701 | { | |
702 | /* Is this the last nonwhite stuff on the line? */ | |
703 | c = getc (finput); | |
704 | while (c == ' ' || c == '\t') | |
705 | c = getc (finput); | |
706 | if (c == '\n') | |
707 | return c; | |
708 | ungetc (c, finput); | |
709 | ||
710 | token = yylex (); | |
711 | used_up = 0; | |
712 | } | |
713 | ||
714 | /* `3' after file name means this is a system header file. */ | |
715 | ||
716 | if (token == CONSTANT | |
717 | && TREE_CODE (yylval.ttype) == INTEGER_CST | |
718 | && TREE_INT_CST_LOW (yylval.ttype) == 3) | |
719 | in_system_header = 1; | |
720 | } | |
721 | else | |
722 | error ("invalid #-line"); | |
723 | ||
724 | /* skip the rest of this line. */ | |
725 | skipline: | |
726 | if (c == '\n') | |
727 | return c; | |
728 | while ((c = getc (finput)) != EOF && c != '\n'); | |
729 | return c; | |
730 | } | |
731 | \f | |
732 | #define isalnum(char) ((char >= 'a' && char <= 'z') || (char >= 'A' && char <= 'Z') || (char >= '0' && char <= '9')) | |
733 | #define isdigit(char) (char >= '0' && char <= '9') | |
734 | #define ENDFILE -1 /* token that represents end-of-file */ | |
735 | ||
736 | /* Read an escape sequence, returning its equivalent as a character, | |
737 | or -1 if it is backslash-newline. */ | |
738 | ||
739 | static int | |
740 | readescape () | |
741 | { | |
742 | register int c = getc (finput); | |
743 | register int code; | |
744 | register unsigned count; | |
745 | unsigned firstdig; | |
746 | ||
747 | switch (c) | |
748 | { | |
749 | case 'x': | |
750 | if (warn_traditional) | |
751 | warning ("the meaning of `\\x' varies with -traditional"); | |
752 | ||
753 | if (flag_traditional) | |
754 | return c; | |
755 | ||
756 | code = 0; | |
757 | count = 0; | |
758 | while (1) | |
759 | { | |
760 | c = getc (finput); | |
761 | if (!(c >= 'a' && c <= 'f') | |
762 | && !(c >= 'A' && c <= 'F') | |
763 | && !(c >= '0' && c <= '9')) | |
764 | { | |
765 | ungetc (c, finput); | |
766 | break; | |
767 | } | |
768 | code *= 16; | |
769 | if (c >= 'a' && c <= 'f') | |
770 | code += c - 'a' + 10; | |
771 | if (c >= 'A' && c <= 'F') | |
772 | code += c - 'A' + 10; | |
773 | if (c >= '0' && c <= '9') | |
774 | code += c - '0'; | |
775 | if (count == 0) | |
776 | firstdig = code; | |
777 | count++; | |
778 | } | |
779 | if (count == 0) | |
780 | error ("\\x used with no following hex digits"); | |
781 | else if ((count - 1) * 4 >= TYPE_PRECISION (integer_type_node) | |
782 | || (count > 1 | |
783 | && ((1 << (TYPE_PRECISION (integer_type_node) - (count - 1) * 4)) | |
784 | <= firstdig))) | |
785 | pedwarn ("hex escape out of range"); | |
786 | return code; | |
787 | ||
788 | case '0': case '1': case '2': case '3': case '4': | |
789 | case '5': case '6': case '7': | |
790 | code = 0; | |
791 | count = 0; | |
792 | while ((c <= '7') && (c >= '0') && (count++ < 3)) | |
793 | { | |
794 | code = (code * 8) + (c - '0'); | |
795 | c = getc (finput); | |
796 | } | |
797 | ungetc (c, finput); | |
798 | return code; | |
799 | ||
800 | case '\\': case '\'': case '"': | |
801 | return c; | |
802 | ||
803 | case '\n': | |
804 | lineno++; | |
805 | return -1; | |
806 | ||
807 | case 'n': | |
808 | return TARGET_NEWLINE; | |
809 | ||
810 | case 't': | |
811 | return TARGET_TAB; | |
812 | ||
813 | case 'r': | |
814 | return TARGET_CR; | |
815 | ||
816 | case 'f': | |
817 | return TARGET_FF; | |
818 | ||
819 | case 'b': | |
820 | return TARGET_BS; | |
821 | ||
822 | case 'a': | |
823 | if (warn_traditional) | |
824 | warning ("the meaning of `\\a' varies with -traditional"); | |
825 | ||
826 | if (flag_traditional) | |
827 | return c; | |
828 | return TARGET_BELL; | |
829 | ||
830 | case 'v': | |
831 | #if 0 /* Vertical tab is present in common usage compilers. */ | |
832 | if (flag_traditional) | |
833 | return c; | |
834 | #endif | |
835 | return TARGET_VT; | |
836 | ||
837 | case 'E': | |
838 | pedwarn ("non-ANSI-standard escape sequence, `\\E'"); | |
839 | return 033; | |
840 | ||
841 | case '?': | |
842 | return c; | |
843 | ||
844 | /* `\(', etc, are used at beginning of line to avoid confusing Emacs. */ | |
845 | case '(': | |
846 | case '{': | |
847 | case '[': | |
848 | if (pedantic) | |
849 | pedwarn ("non-ANSI escape sequence `\\%c'", c); | |
850 | return c; | |
851 | } | |
852 | if (c >= 040 && c <= 0177) | |
853 | pedwarn ("unknown escape sequence `\\%c'", c); | |
854 | else | |
855 | pedwarn ("unknown escape sequence: `\\' followed by char code 0x%x", c); | |
856 | return c; | |
857 | } | |
858 | \f | |
859 | void | |
860 | yyerror (string) | |
861 | char *string; | |
862 | { | |
863 | char buf[200]; | |
864 | ||
865 | strcpy (buf, string); | |
866 | ||
867 | /* We can't print string and character constants well | |
868 | because the token_buffer contains the result of processing escapes. */ | |
869 | if (end_of_file) | |
870 | strcat (buf, " at end of input"); | |
871 | else if (token_buffer[0] == 0) | |
872 | strcat (buf, " at null character"); | |
873 | else if (token_buffer[0] == '"') | |
874 | strcat (buf, " before string constant"); | |
875 | else if (token_buffer[0] == '\'') | |
876 | strcat (buf, " before character constant"); | |
877 | else if (token_buffer[0] < 040 || (unsigned char) token_buffer[0] >= 0177) | |
878 | sprintf (buf + strlen (buf), " before character 0%o", | |
879 | (unsigned char) token_buffer[0]); | |
880 | else | |
881 | strcat (buf, " before `%s'"); | |
882 | ||
883 | error (buf, token_buffer); | |
884 | } | |
885 | ||
886 | #if 0 | |
887 | ||
888 | struct try_type | |
889 | { | |
890 | tree *node_var; | |
891 | char unsigned_flag; | |
892 | char long_flag; | |
893 | char long_long_flag; | |
894 | }; | |
895 | ||
896 | struct try_type type_sequence[] = | |
897 | { | |
898 | { &integer_type_node, 0, 0, 0}, | |
899 | { &unsigned_type_node, 1, 0, 0}, | |
900 | { &long_integer_type_node, 0, 1, 0}, | |
901 | { &long_unsigned_type_node, 1, 1, 0}, | |
902 | { &long_long_integer_type_node, 0, 1, 1}, | |
903 | { &long_long_unsigned_type_node, 1, 1, 1} | |
904 | }; | |
905 | #endif /* 0 */ | |
906 | \f | |
907 | int | |
908 | yylex () | |
909 | { | |
910 | register int c; | |
911 | register char *p; | |
912 | register int value; | |
913 | int wide_flag = 0; | |
914 | ||
915 | if (nextchar >= 0) | |
916 | c = nextchar, nextchar = -1; | |
917 | else | |
918 | c = getc (finput); | |
919 | ||
920 | /* Effectively do c = skip_white_space (c) | |
921 | but do it faster in the usual cases. */ | |
922 | while (1) | |
923 | switch (c) | |
924 | { | |
925 | case '\r': | |
926 | if (!flag_traditional) /* ANSI says no */ | |
927 | goto found_nonwhite; | |
928 | case ' ': | |
929 | case '\t': | |
930 | case '\f': | |
931 | case '\v': | |
932 | case '\b': | |
933 | c = getc (finput); | |
934 | break; | |
935 | ||
936 | case '\n': | |
937 | case '/': | |
938 | case '\\': | |
939 | c = skip_white_space (c); | |
940 | default: | |
941 | goto found_nonwhite; | |
942 | } | |
943 | found_nonwhite: | |
944 | ||
945 | token_buffer[0] = c; | |
946 | token_buffer[1] = 0; | |
947 | ||
948 | /* yylloc.first_line = lineno; */ | |
949 | ||
950 | switch (c) | |
951 | { | |
952 | case EOF: | |
953 | end_of_file = 1; | |
954 | token_buffer[0] = 0; | |
955 | value = ENDFILE; | |
956 | break; | |
957 | ||
958 | case '$': | |
959 | if (dollars_in_ident) | |
960 | goto letter; | |
961 | return '$'; | |
962 | ||
963 | case 'L': | |
964 | /* Capital L may start a wide-string or wide-character constant. */ | |
965 | { | |
966 | register int c = getc (finput); | |
967 | if (c == '\'') | |
968 | { | |
969 | wide_flag = 1; | |
970 | goto char_constant; | |
971 | } | |
972 | if (c == '"') | |
973 | { | |
974 | wide_flag = 1; | |
975 | goto string_constant; | |
976 | } | |
977 | ungetc (c, finput); | |
978 | } | |
979 | goto letter; | |
980 | ||
981 | case '@': | |
982 | if (!doing_objc_thang) | |
983 | { | |
984 | value = c; | |
985 | break; | |
986 | } | |
987 | p = token_buffer; | |
988 | *p++ = '@'; | |
989 | c = getc (finput); | |
990 | while (isalnum (c) || c == '_') | |
991 | { | |
992 | if (p >= token_buffer + maxtoken) | |
993 | p = extend_token_buffer (p); | |
994 | ||
995 | *p++ = c; | |
996 | c = getc (finput); | |
997 | } | |
998 | ||
999 | *p = 0; | |
1000 | nextchar = c; | |
1001 | value = recognize_objc_keyword (token_buffer + 1); | |
1002 | if (value != 0) | |
1003 | break; | |
1004 | error ("invalid Objective C keyword `%s'", token_buffer); | |
1005 | /* Cause a syntax error--1 is not a valid token type. */ | |
1006 | value = 1; | |
1007 | break; | |
1008 | ||
1009 | case 'A': case 'B': case 'C': case 'D': case 'E': | |
1010 | case 'F': case 'G': case 'H': case 'I': case 'J': | |
1011 | case 'K': case 'M': case 'N': case 'O': | |
1012 | case 'P': case 'Q': case 'R': case 'S': case 'T': | |
1013 | case 'U': case 'V': case 'W': case 'X': case 'Y': | |
1014 | case 'Z': | |
1015 | case 'a': case 'b': case 'c': case 'd': case 'e': | |
1016 | case 'f': case 'g': case 'h': case 'i': case 'j': | |
1017 | case 'k': case 'l': case 'm': case 'n': case 'o': | |
1018 | case 'p': case 'q': case 'r': case 's': case 't': | |
1019 | case 'u': case 'v': case 'w': case 'x': case 'y': | |
1020 | case 'z': | |
1021 | case '_': | |
1022 | letter: | |
1023 | p = token_buffer; | |
1024 | while (isalnum (c) || c == '_' || c == '$' || c == '@') | |
1025 | { | |
1026 | if (p >= token_buffer + maxtoken) | |
1027 | p = extend_token_buffer (p); | |
1028 | if (c == '$' && ! dollars_in_ident) | |
1029 | break; | |
1030 | ||
1031 | *p++ = c; | |
1032 | c = getc (finput); | |
1033 | } | |
1034 | ||
1035 | *p = 0; | |
1036 | nextchar = c; | |
1037 | ||
1038 | value = IDENTIFIER; | |
1039 | yylval.itype = 0; | |
1040 | ||
1041 | /* Try to recognize a keyword. Uses minimum-perfect hash function */ | |
1042 | ||
1043 | { | |
1044 | register struct resword *ptr; | |
1045 | ||
1046 | if (ptr = is_reserved_word (token_buffer, p - token_buffer)) | |
1047 | { | |
1048 | if (ptr->rid) | |
1049 | yylval.ttype = ridpointers[(int) ptr->rid]; | |
1050 | value = (int) ptr->token; | |
1051 | ||
1052 | /* Even if we decided to recognize asm, still perhaps warn. */ | |
1053 | if (pedantic | |
d45cf215 | 1054 | && (value == ASM_KEYWORD || value == TYPEOF |
e8bbfc4e RK |
1055 | || ptr->rid == RID_INLINE) |
1056 | && token_buffer[0] != '_') | |
1057 | pedwarn ("ANSI does not permit the keyword `%s'", | |
1058 | token_buffer); | |
1059 | } | |
1060 | } | |
1061 | ||
1062 | /* If we did not find a keyword, look for an identifier | |
1063 | (or a typename). */ | |
1064 | ||
1065 | if (value == IDENTIFIER) | |
1066 | { | |
1067 | yylval.ttype = get_identifier (token_buffer); | |
1068 | lastiddecl = lookup_name (yylval.ttype); | |
1069 | ||
1070 | if (lastiddecl != 0 && TREE_CODE (lastiddecl) == TYPE_DECL) | |
1071 | value = TYPENAME; | |
6dbf678a RS |
1072 | /* A user-invisible read-only initialized variable |
1073 | should be replaced by its value. | |
1074 | We handle only strings since that's the only case used in C. */ | |
1075 | else if (lastiddecl != 0 && TREE_CODE (lastiddecl) == VAR_DECL | |
1076 | && DECL_IGNORED_P (lastiddecl) | |
1077 | && TREE_READONLY (lastiddecl) | |
1078 | && DECL_INITIAL (lastiddecl) != 0 | |
1079 | && TREE_CODE (DECL_INITIAL (lastiddecl)) == STRING_CST) | |
1080 | { | |
1081 | yylval.ttype = DECL_INITIAL (lastiddecl); | |
1082 | value = STRING; | |
1083 | } | |
e8bbfc4e RK |
1084 | else if (doing_objc_thang) |
1085 | { | |
1086 | tree objc_interface_decl = lookup_interface (yylval.ttype); | |
1087 | ||
1088 | if (objc_interface_decl) | |
1089 | { | |
1090 | value = CLASSNAME; | |
1091 | yylval.ttype = objc_interface_decl; | |
1092 | } | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | break; | |
1097 | ||
1098 | case '0': case '1': case '2': case '3': case '4': | |
1099 | case '5': case '6': case '7': case '8': case '9': | |
1100 | case '.': | |
1101 | { | |
1102 | int base = 10; | |
1103 | int count = 0; | |
1104 | int largest_digit = 0; | |
1105 | int numdigits = 0; | |
1106 | /* for multi-precision arithmetic, | |
1107 | we store only 8 live bits in each short, | |
1108 | giving us 64 bits of reliable precision */ | |
1109 | short shorts[8]; | |
1110 | int overflow = 0; | |
1111 | ||
1112 | enum anon1 { NOT_FLOAT, AFTER_POINT, TOO_MANY_POINTS} floatflag | |
1113 | = NOT_FLOAT; | |
1114 | ||
1115 | for (count = 0; count < 8; count++) | |
1116 | shorts[count] = 0; | |
1117 | ||
1118 | p = token_buffer; | |
1119 | *p++ = c; | |
1120 | ||
1121 | if (c == '0') | |
1122 | { | |
1123 | *p++ = (c = getc (finput)); | |
1124 | if ((c == 'x') || (c == 'X')) | |
1125 | { | |
1126 | base = 16; | |
1127 | *p++ = (c = getc (finput)); | |
1128 | } | |
1129 | /* Leading 0 forces octal unless the 0 is the only digit. */ | |
1130 | else if (c >= '0' && c <= '9') | |
1131 | { | |
1132 | base = 8; | |
1133 | numdigits++; | |
1134 | } | |
1135 | else | |
1136 | numdigits++; | |
1137 | } | |
1138 | ||
1139 | /* Read all the digits-and-decimal-points. */ | |
1140 | ||
1141 | while (c == '.' | |
1142 | || (isalnum (c) && (c != 'l') && (c != 'L') | |
1143 | && (c != 'u') && (c != 'U') | |
1144 | && (floatflag == NOT_FLOAT || ((c != 'f') && (c != 'F'))))) | |
1145 | { | |
1146 | if (c == '.') | |
1147 | { | |
1148 | if (base == 16) | |
1149 | error ("floating constant may not be in radix 16"); | |
1150 | if (floatflag == AFTER_POINT) | |
1151 | { | |
1152 | error ("malformed floating constant"); | |
1153 | floatflag = TOO_MANY_POINTS; | |
1154 | } | |
1155 | else | |
1156 | floatflag = AFTER_POINT; | |
1157 | ||
1158 | base = 10; | |
1159 | *p++ = c = getc (finput); | |
1160 | /* Accept '.' as the start of a floating-point number | |
1161 | only when it is followed by a digit. | |
1162 | Otherwise, unread the following non-digit | |
1163 | and use the '.' as a structural token. */ | |
1164 | if (p == token_buffer + 2 && !isdigit (c)) | |
1165 | { | |
1166 | if (c == '.') | |
1167 | { | |
1168 | c = getc (finput); | |
1169 | if (c == '.') | |
1170 | { | |
1171 | *p++ = c; | |
1172 | *p = 0; | |
1173 | return ELLIPSIS; | |
1174 | } | |
1175 | error ("parse error at `..'"); | |
1176 | } | |
1177 | ungetc (c, finput); | |
1178 | token_buffer[1] = 0; | |
1179 | value = '.'; | |
1180 | goto done; | |
1181 | } | |
1182 | } | |
1183 | else | |
1184 | { | |
1185 | /* It is not a decimal point. | |
1186 | It should be a digit (perhaps a hex digit). */ | |
1187 | ||
1188 | if (isdigit (c)) | |
1189 | { | |
1190 | c = c - '0'; | |
1191 | } | |
1192 | else if (base <= 10) | |
1193 | { | |
1194 | if ((c&~040) == 'E') | |
1195 | { | |
1196 | base = 10; | |
1197 | floatflag = AFTER_POINT; | |
1198 | break; /* start of exponent */ | |
1199 | } | |
1200 | error ("nondigits in number and not hexadecimal"); | |
1201 | c = 0; | |
1202 | } | |
1203 | else if (c >= 'a') | |
1204 | { | |
1205 | c = c - 'a' + 10; | |
1206 | } | |
1207 | else | |
1208 | { | |
1209 | c = c - 'A' + 10; | |
1210 | } | |
1211 | if (c >= largest_digit) | |
1212 | largest_digit = c; | |
1213 | numdigits++; | |
1214 | ||
1215 | for (count = 0; count < 8; count++) | |
1216 | { | |
1217 | shorts[count] *= base; | |
1218 | if (count) | |
1219 | { | |
1220 | shorts[count] += (shorts[count-1] >> 8); | |
1221 | shorts[count-1] &= (1<<8)-1; | |
1222 | } | |
1223 | else shorts[0] += c; | |
1224 | } | |
1225 | ||
1226 | if (shorts[7] >= 1<<8 | |
1227 | || shorts[7] < - (1 << 8)) | |
1228 | overflow = TRUE; | |
1229 | ||
1230 | if (p >= token_buffer + maxtoken - 3) | |
1231 | p = extend_token_buffer (p); | |
1232 | *p++ = (c = getc (finput)); | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | if (numdigits == 0) | |
1237 | error ("numeric constant with no digits"); | |
1238 | ||
1239 | if (largest_digit >= base) | |
1240 | error ("numeric constant contains digits beyond the radix"); | |
1241 | ||
1242 | /* Remove terminating char from the token buffer and delimit the string */ | |
1243 | *--p = 0; | |
1244 | ||
1245 | if (floatflag != NOT_FLOAT) | |
1246 | { | |
1247 | tree type = double_type_node; | |
1248 | char f_seen = 0; | |
1249 | char l_seen = 0; | |
1250 | REAL_VALUE_TYPE value; | |
1251 | jmp_buf handler; | |
1252 | ||
1253 | /* Read explicit exponent if any, and put it in tokenbuf. */ | |
1254 | ||
1255 | if ((c == 'e') || (c == 'E')) | |
1256 | { | |
1257 | if (p >= token_buffer + maxtoken - 3) | |
1258 | p = extend_token_buffer (p); | |
1259 | *p++ = c; | |
1260 | c = getc (finput); | |
1261 | if ((c == '+') || (c == '-')) | |
1262 | { | |
1263 | *p++ = c; | |
1264 | c = getc (finput); | |
1265 | } | |
1266 | if (! isdigit (c)) | |
1267 | error ("floating constant exponent has no digits"); | |
1268 | while (isdigit (c)) | |
1269 | { | |
1270 | if (p >= token_buffer + maxtoken - 3) | |
1271 | p = extend_token_buffer (p); | |
1272 | *p++ = c; | |
1273 | c = getc (finput); | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | *p = 0; | |
1278 | errno = 0; | |
1279 | ||
1280 | /* Convert string to a double, checking for overflow. */ | |
1281 | if (setjmp (handler)) | |
1282 | { | |
1283 | error ("floating constant out of range"); | |
1284 | value = dconst0; | |
1285 | } | |
1286 | else | |
1287 | { | |
1288 | set_float_handler (handler); | |
1289 | value = REAL_VALUE_ATOF (token_buffer); | |
1290 | set_float_handler (0); | |
1291 | } | |
1292 | #ifdef ERANGE | |
1293 | if (errno == ERANGE && !flag_traditional) | |
1294 | { | |
1295 | char *p1 = token_buffer; | |
1296 | /* Check for "0.0" and variants; | |
1297 | Sunos 4 spuriously returns ERANGE for them. */ | |
1298 | while (*p1 == '0') p1++; | |
1299 | if (*p1 == '.') | |
1300 | { | |
1301 | p1++; | |
1302 | while (*p1 == '0') p1++; | |
1303 | } | |
1304 | if (*p1 == 'e' || *p1 == 'E') | |
1305 | { | |
1306 | /* with significand==0, ignore the exponent */ | |
1307 | p1++; | |
1308 | while (*p1 != 0) p1++; | |
1309 | } | |
1310 | /* ERANGE is also reported for underflow, | |
1311 | so test the value to distinguish overflow from that. */ | |
1312 | if (*p1 != 0 && (value > 1.0 || value < -1.0)) | |
7e8b9a1d | 1313 | pedwarn ("floating point number exceeds range of `double'"); |
e8bbfc4e RK |
1314 | } |
1315 | #endif | |
1316 | ||
1317 | /* Read the suffixes to choose a data type. */ | |
1318 | while (1) | |
1319 | { | |
1320 | if (c == 'f' || c == 'F') | |
1321 | { | |
1322 | if (f_seen) | |
1323 | error ("two `f's in floating constant"); | |
1324 | f_seen = 1; | |
1325 | type = float_type_node; | |
1326 | value = REAL_VALUE_TRUNCATE (TYPE_MODE (type), value); | |
1327 | } | |
1328 | else if (c == 'l' || c == 'L') | |
1329 | { | |
1330 | if (l_seen) | |
1331 | error ("two `l's in floating constant"); | |
1332 | l_seen = 1; | |
1333 | type = long_double_type_node; | |
1334 | } | |
1335 | else | |
1336 | { | |
1337 | if (isalnum (c)) | |
1338 | { | |
1339 | error ("garbage at end of number"); | |
1340 | while (isalnum (c)) | |
1341 | { | |
1342 | if (p >= token_buffer + maxtoken - 3) | |
1343 | p = extend_token_buffer (p); | |
1344 | *p++ = c; | |
1345 | c = getc (finput); | |
1346 | } | |
1347 | } | |
1348 | break; | |
1349 | } | |
1350 | if (p >= token_buffer + maxtoken - 3) | |
1351 | p = extend_token_buffer (p); | |
1352 | *p++ = c; | |
1353 | c = getc (finput); | |
1354 | } | |
1355 | ||
1356 | /* Create a node with determined type and value. */ | |
1357 | yylval.ttype = build_real (type, value); | |
1358 | ||
1359 | ungetc (c, finput); | |
1360 | *p = 0; | |
1361 | } | |
1362 | else | |
1363 | { | |
1364 | tree traditional_type, ansi_type, type; | |
1365 | int spec_unsigned = 0; | |
1366 | int spec_long = 0; | |
1367 | int spec_long_long = 0; | |
1368 | int bytes, warn, i; | |
1369 | ||
1370 | while (1) | |
1371 | { | |
1372 | if (c == 'u' || c == 'U') | |
1373 | { | |
1374 | if (spec_unsigned) | |
1375 | error ("two `u's in integer constant"); | |
1376 | spec_unsigned = 1; | |
1377 | } | |
1378 | else if (c == 'l' || c == 'L') | |
1379 | { | |
1380 | if (spec_long) | |
1381 | { | |
1382 | if (spec_long_long) | |
1383 | error ("three `l's in integer constant"); | |
1384 | else if (pedantic) | |
1385 | pedwarn ("ANSI C forbids long long integer constants"); | |
1386 | spec_long_long = 1; | |
1387 | } | |
1388 | spec_long = 1; | |
1389 | } | |
1390 | else | |
1391 | { | |
1392 | if (isalnum (c)) | |
1393 | { | |
1394 | error ("garbage at end of number"); | |
1395 | while (isalnum (c)) | |
1396 | { | |
1397 | if (p >= token_buffer + maxtoken - 3) | |
1398 | p = extend_token_buffer (p); | |
1399 | *p++ = c; | |
1400 | c = getc (finput); | |
1401 | } | |
1402 | } | |
1403 | break; | |
1404 | } | |
1405 | if (p >= token_buffer + maxtoken - 3) | |
1406 | p = extend_token_buffer (p); | |
1407 | *p++ = c; | |
1408 | c = getc (finput); | |
1409 | } | |
1410 | ||
1411 | ungetc (c, finput); | |
1412 | ||
1413 | /* If the constant is not long long and it won't fit in an | |
1414 | unsigned long, or if the constant is long long and won't fit | |
1415 | in an unsigned long long, then warn that the constant is out | |
1416 | of range. */ | |
1417 | ||
1418 | /* ??? This assumes that long long and long integer types are | |
1419 | a multiple of 8 bits. This better than the original code | |
1420 | though which assumed that long was exactly 32 bits and long | |
1421 | long was exactly 64 bits. */ | |
1422 | ||
1423 | if (spec_long_long) | |
1424 | bytes = TYPE_PRECISION (long_long_integer_type_node) / 8; | |
1425 | else | |
1426 | bytes = TYPE_PRECISION (long_integer_type_node) / 8; | |
1427 | ||
1428 | if (bytes <= 8) | |
1429 | { | |
1430 | warn = overflow; | |
1431 | for (i = bytes; i < 8; i++) | |
1432 | if (shorts[i]) | |
1433 | { | |
1434 | /* If LL was not used, then clear any excess precision. | |
1435 | This is equivalent to the original code, but it is | |
1436 | not clear why this is being done. Perhaps to prevent | |
1437 | ANSI programs from creating long long constants | |
1438 | by accident? */ | |
1439 | if (! spec_long_long) | |
1440 | shorts[i] = 0; | |
1441 | warn = 1; | |
1442 | } | |
1443 | if (warn) | |
1444 | warning ("integer constant out of range"); | |
1445 | } | |
1446 | else if (overflow) | |
1447 | warning ("integer constant larger than compiler can handle"); | |
1448 | ||
1449 | /* If it overflowed our internal buffer, then make it unsigned. | |
1450 | We can't distinguish based on the tree node because | |
1451 | any integer constant fits any long long type. */ | |
1452 | if (overflow) | |
1453 | spec_unsigned = 1; | |
1454 | ||
1455 | /* This is simplified by the fact that our constant | |
1456 | is always positive. */ | |
1457 | /* The casts in the following statement should not be | |
1458 | needed, but they get around bugs in some C compilers. */ | |
1459 | yylval.ttype | |
1460 | = (build_int_2 | |
1461 | ((((long)shorts[3]<<24) + ((long)shorts[2]<<16) | |
1462 | + ((long)shorts[1]<<8) + (long)shorts[0]), | |
1463 | (((long)shorts[7]<<24) + ((long)shorts[6]<<16) | |
1464 | + ((long)shorts[5]<<8) + (long)shorts[4]))); | |
1465 | ||
1466 | #if 0 | |
1467 | /* Find the first allowable type that the value fits in. */ | |
1468 | type = 0; | |
1469 | for (i = 0; i < sizeof (type_sequence) / sizeof (type_sequence[0]); | |
1470 | i++) | |
1471 | if (!(spec_long && !type_sequence[i].long_flag) | |
1472 | && !(spec_long_long && !type_sequence[i].long_long_flag) | |
1473 | && !(spec_unsigned && !type_sequence[i].unsigned_flag) | |
1474 | /* A decimal constant can't be unsigned int | |
1475 | unless explicitly specified. */ | |
1476 | && !(base == 10 && !spec_unsigned | |
1477 | && *type_sequence[i].node_var == unsigned_type_node)) | |
1478 | if (int_fits_type_p (yylval.ttype, *type_sequence[i].node_var)) | |
1479 | { | |
1480 | type = *type_sequence[i].node_var; | |
1481 | break; | |
1482 | } | |
1483 | if (flag_traditional && type == long_unsigned_type_node | |
1484 | && !spec_unsigned) | |
1485 | type = long_integer_type_node; | |
1486 | ||
1487 | if (type == 0) | |
1488 | { | |
1489 | type = long_long_integer_type_node; | |
1490 | warning ("integer constant out of range"); | |
1491 | } | |
1492 | ||
1493 | /* Warn about some cases where the type of a given constant | |
1494 | changes from traditional C to ANSI C. */ | |
1495 | if (warn_traditional) | |
1496 | { | |
1497 | tree other_type = 0; | |
1498 | ||
1499 | /* This computation is the same as the previous one | |
1500 | except that flag_traditional is used backwards. */ | |
1501 | for (i = 0; i < sizeof (type_sequence) / sizeof (type_sequence[0]); | |
1502 | i++) | |
1503 | if (!(spec_long && !type_sequence[i].long_flag) | |
1504 | && !(spec_long_long && !type_sequence[i].long_long_flag) | |
1505 | && !(spec_unsigned && !type_sequence[i].unsigned_flag) | |
1506 | /* A decimal constant can't be unsigned int | |
1507 | unless explicitly specified. */ | |
1508 | && !(base == 10 && !spec_unsigned | |
1509 | && *type_sequence[i].node_var == unsigned_type_node)) | |
1510 | if (int_fits_type_p (yylval.ttype, *type_sequence[i].node_var)) | |
1511 | { | |
1512 | other_type = *type_sequence[i].node_var; | |
1513 | break; | |
1514 | } | |
1515 | if (!flag_traditional && type == long_unsigned_type_node | |
1516 | && !spec_unsigned) | |
1517 | type = long_integer_type_node; | |
1518 | ||
1519 | if (other_type != 0 && other_type != type) | |
1520 | { | |
1521 | if (flag_traditional) | |
1522 | warning ("type of integer constant would be different without -traditional"); | |
1523 | else | |
1524 | warning ("type of integer constant would be different with -traditional"); | |
1525 | } | |
1526 | } | |
1527 | ||
1528 | #else /* 1 */ | |
1529 | /* If warn_traditional, calculate both the ANSI type and the | |
1530 | traditional type, then see if they disagree. | |
1531 | Otherwise, calculate only the type for the dialect in use. */ | |
1532 | if (warn_traditional || flag_traditional) | |
1533 | { | |
1534 | /* Calculate the traditional type. */ | |
1535 | /* Traditionally, any constant is signed; | |
1536 | but if unsigned is specified explicitly, obey that. | |
1537 | Use the smallest size with the right number of bits, | |
1538 | except for one special case with decimal constants. */ | |
1539 | if (! spec_long && base != 10 | |
1540 | && int_fits_type_p (yylval.ttype, unsigned_type_node)) | |
1541 | traditional_type = (spec_unsigned ? unsigned_type_node | |
1542 | : integer_type_node); | |
1543 | /* A decimal constant must be long | |
1544 | if it does not fit in type int. | |
1545 | I think this is independent of whether | |
1546 | the constant is signed. */ | |
1547 | else if (! spec_long && base == 10 | |
1548 | && int_fits_type_p (yylval.ttype, integer_type_node)) | |
1549 | traditional_type = (spec_unsigned ? unsigned_type_node | |
1550 | : integer_type_node); | |
1551 | else if (! spec_long_long | |
1552 | && int_fits_type_p (yylval.ttype, | |
1553 | long_unsigned_type_node)) | |
1554 | traditional_type = (spec_unsigned ? long_unsigned_type_node | |
1555 | : long_integer_type_node); | |
1556 | else | |
1557 | traditional_type = (spec_unsigned | |
1558 | ? long_long_unsigned_type_node | |
1559 | : long_long_integer_type_node); | |
1560 | } | |
1561 | if (warn_traditional || ! flag_traditional) | |
1562 | { | |
1563 | /* Calculate the ANSI type. */ | |
1564 | if (! spec_long && ! spec_unsigned | |
1565 | && int_fits_type_p (yylval.ttype, integer_type_node)) | |
1566 | ansi_type = integer_type_node; | |
1567 | else if (! spec_long && (base != 10 || spec_unsigned) | |
1568 | && int_fits_type_p (yylval.ttype, unsigned_type_node)) | |
1569 | ansi_type = unsigned_type_node; | |
1570 | else if (! spec_unsigned && !spec_long_long | |
1571 | && int_fits_type_p (yylval.ttype, long_integer_type_node)) | |
1572 | ansi_type = long_integer_type_node; | |
1573 | else if (! spec_long_long | |
1574 | && int_fits_type_p (yylval.ttype, | |
1575 | long_unsigned_type_node)) | |
1576 | ansi_type = long_unsigned_type_node; | |
1577 | else if (! spec_unsigned | |
1578 | && int_fits_type_p (yylval.ttype, | |
1579 | long_long_integer_type_node)) | |
1580 | ansi_type = long_long_integer_type_node; | |
1581 | else | |
1582 | ansi_type = long_long_unsigned_type_node; | |
1583 | } | |
1584 | ||
1585 | type = flag_traditional ? traditional_type : ansi_type; | |
1586 | ||
1587 | if (warn_traditional && traditional_type != ansi_type) | |
1588 | { | |
1589 | if (TYPE_PRECISION (traditional_type) | |
1590 | != TYPE_PRECISION (ansi_type)) | |
1591 | warning ("width of integer constant changes with -traditional"); | |
1592 | else if (TREE_UNSIGNED (traditional_type) | |
1593 | != TREE_UNSIGNED (ansi_type)) | |
1594 | warning ("integer constant is unsigned in ANSI C, signed with -traditional"); | |
a3ee5899 JW |
1595 | else |
1596 | warning ("width of integer constant may change on other systems with -traditional"); | |
e8bbfc4e RK |
1597 | } |
1598 | #endif | |
1599 | ||
1600 | TREE_TYPE (yylval.ttype) = type; | |
1601 | *p = 0; | |
1602 | } | |
1603 | ||
1604 | value = CONSTANT; break; | |
1605 | } | |
1606 | ||
1607 | case '\'': | |
1608 | char_constant: | |
1609 | { | |
1610 | register int result = 0; | |
1611 | register num_chars = 0; | |
1612 | unsigned width = TYPE_PRECISION (char_type_node); | |
1613 | int max_chars; | |
1614 | ||
1615 | if (wide_flag) | |
1616 | { | |
1617 | width = WCHAR_TYPE_SIZE; | |
1618 | #ifdef MULTIBYTE_CHARS | |
1619 | max_chars = MB_CUR_MAX; | |
1620 | #else | |
1621 | max_chars = 1; | |
1622 | #endif | |
1623 | } | |
1624 | else | |
1625 | max_chars = TYPE_PRECISION (integer_type_node) / width; | |
1626 | ||
1627 | while (1) | |
1628 | { | |
1629 | tryagain: | |
1630 | ||
1631 | c = getc (finput); | |
1632 | ||
1633 | if (c == '\'' || c == EOF) | |
1634 | break; | |
1635 | ||
1636 | if (c == '\\') | |
1637 | { | |
1638 | c = readescape (); | |
1639 | if (c < 0) | |
1640 | goto tryagain; | |
1641 | if (width < HOST_BITS_PER_INT | |
1642 | && (unsigned) c >= (1 << width)) | |
1643 | pedwarn ("escape sequence out of range for character"); | |
1644 | } | |
1645 | else if (c == '\n') | |
1646 | { | |
1647 | if (pedantic) | |
1648 | pedwarn ("ANSI C forbids newline in character constant"); | |
1649 | lineno++; | |
1650 | } | |
1651 | ||
1652 | num_chars++; | |
1653 | if (num_chars > maxtoken - 4) | |
1654 | extend_token_buffer (token_buffer); | |
1655 | ||
1656 | token_buffer[num_chars] = c; | |
1657 | ||
1658 | /* Merge character into result; ignore excess chars. */ | |
1659 | if (num_chars < max_chars + 1) | |
1660 | { | |
1661 | if (width < HOST_BITS_PER_INT) | |
1662 | result = (result << width) | (c & ((1 << width) - 1)); | |
1663 | else | |
1664 | result = c; | |
1665 | } | |
1666 | } | |
1667 | ||
1668 | token_buffer[num_chars + 1] = '\''; | |
1669 | token_buffer[num_chars + 2] = 0; | |
1670 | ||
1671 | if (c != '\'') | |
1672 | error ("malformatted character constant"); | |
1673 | else if (num_chars == 0) | |
1674 | error ("empty character constant"); | |
1675 | else if (num_chars > max_chars) | |
1676 | { | |
1677 | num_chars = max_chars; | |
1678 | error ("character constant too long"); | |
1679 | } | |
1680 | else if (num_chars != 1 && ! flag_traditional) | |
1681 | warning ("multi-character character constant"); | |
1682 | ||
1683 | /* If char type is signed, sign-extend the constant. */ | |
1684 | if (! wide_flag) | |
1685 | { | |
1686 | int num_bits = num_chars * width; | |
1687 | if (TREE_UNSIGNED (char_type_node) | |
1688 | || ((result >> (num_bits - 1)) & 1) == 0) | |
1689 | yylval.ttype | |
1690 | = build_int_2 (result & ((unsigned) ~0 | |
1691 | >> (HOST_BITS_PER_INT - num_bits)), | |
1692 | 0); | |
1693 | else | |
1694 | yylval.ttype | |
1695 | = build_int_2 (result | ~((unsigned) ~0 | |
1696 | >> (HOST_BITS_PER_INT - num_bits)), | |
1697 | -1); | |
1698 | } | |
1699 | else | |
1700 | { | |
1701 | #ifdef MULTIBYTE_CHARS | |
1702 | /* Set the initial shift state and convert the next sequence. */ | |
1703 | result = 0; | |
1704 | /* In all locales L'\0' is zero and mbtowc will return zero, | |
1705 | so don't use it. */ | |
1706 | if (num_chars > 1 | |
1707 | || (num_chars == 1 && token_buffer[1] != '\0')) | |
1708 | { | |
1709 | wchar_t wc; | |
1710 | (void) mbtowc (NULL, NULL, 0); | |
1711 | if (mbtowc (& wc, token_buffer + 1, num_chars) == num_chars) | |
1712 | result = wc; | |
1713 | else | |
1714 | warning ("Ignoring invalid multibyte character"); | |
1715 | } | |
1716 | #endif | |
1717 | yylval.ttype = build_int_2 (result, 0); | |
1718 | } | |
1719 | ||
1720 | TREE_TYPE (yylval.ttype) = integer_type_node; | |
1721 | value = CONSTANT; | |
1722 | break; | |
1723 | } | |
1724 | ||
1725 | case '"': | |
1726 | string_constant: | |
1727 | { | |
1728 | c = getc (finput); | |
1729 | p = token_buffer + 1; | |
1730 | ||
1731 | while (c != '"' && c >= 0) | |
1732 | { | |
1733 | /* ignore_escape_flag is set for reading the filename in #line. */ | |
1734 | if (!ignore_escape_flag && c == '\\') | |
1735 | { | |
1736 | c = readescape (); | |
1737 | if (c < 0) | |
1738 | goto skipnewline; | |
1739 | if (!wide_flag | |
1740 | && TYPE_PRECISION (char_type_node) < HOST_BITS_PER_INT | |
1741 | && c >= (1 << TYPE_PRECISION (char_type_node))) | |
1742 | pedwarn ("escape sequence out of range for character"); | |
1743 | } | |
1744 | else if (c == '\n') | |
1745 | { | |
1746 | if (pedantic) | |
1747 | pedwarn ("ANSI C forbids newline in string constant"); | |
1748 | lineno++; | |
1749 | } | |
1750 | ||
1751 | if (p == token_buffer + maxtoken) | |
1752 | p = extend_token_buffer (p); | |
1753 | *p++ = c; | |
1754 | ||
1755 | skipnewline: | |
1756 | c = getc (finput); | |
1757 | } | |
1758 | *p = 0; | |
1759 | ||
1760 | /* We have read the entire constant. | |
1761 | Construct a STRING_CST for the result. */ | |
1762 | ||
1763 | if (wide_flag) | |
1764 | { | |
1765 | /* If this is a L"..." wide-string, convert the multibyte string | |
1766 | to a wide character string. */ | |
1767 | char *widep = (char *) alloca ((p - token_buffer) * WCHAR_BYTES); | |
1768 | int len; | |
1769 | ||
1770 | #ifdef MULTIBYTE_CHARS | |
1771 | len = mbstowcs ((wchar_t *) widep, token_buffer + 1, p - token_buffer); | |
1772 | if ((unsigned) len >= (p - token_buffer)) | |
1773 | { | |
1774 | warning ("Ignoring invalid multibyte string"); | |
1775 | len = 0; | |
1776 | } | |
1777 | bzero (widep + (len * WCHAR_BYTES), WCHAR_BYTES); | |
1778 | #else | |
1779 | { | |
1780 | union { long l; char c[sizeof (long)]; } u; | |
1781 | int big_endian; | |
1782 | char *wp, *cp; | |
1783 | ||
1784 | /* Determine whether host is little or big endian. */ | |
1785 | u.l = 1; | |
1786 | big_endian = u.c[sizeof (long) - 1]; | |
1787 | wp = widep + (big_endian ? WCHAR_BYTES - 1 : 0); | |
1788 | ||
1789 | bzero (widep, (p - token_buffer) * WCHAR_BYTES); | |
1790 | for (cp = token_buffer + 1; cp < p; cp++) | |
1791 | *wp = *cp, wp += WCHAR_BYTES; | |
1792 | len = p - token_buffer - 1; | |
1793 | } | |
1794 | #endif | |
1795 | yylval.ttype = build_string ((len + 1) * WCHAR_BYTES, widep); | |
1796 | TREE_TYPE (yylval.ttype) = wchar_array_type_node; | |
1797 | } | |
1798 | else | |
1799 | { | |
1800 | yylval.ttype = build_string (p - token_buffer, token_buffer + 1); | |
1801 | TREE_TYPE (yylval.ttype) = char_array_type_node; | |
1802 | } | |
1803 | ||
1804 | *p++ = '"'; | |
1805 | *p = 0; | |
1806 | ||
1807 | value = STRING; break; | |
1808 | } | |
1809 | ||
1810 | case '+': | |
1811 | case '-': | |
1812 | case '&': | |
1813 | case '|': | |
1814 | case '<': | |
1815 | case '>': | |
1816 | case '*': | |
1817 | case '/': | |
1818 | case '%': | |
1819 | case '^': | |
1820 | case '!': | |
1821 | case '=': | |
1822 | { | |
1823 | register int c1; | |
1824 | ||
1825 | combine: | |
1826 | ||
1827 | switch (c) | |
1828 | { | |
1829 | case '+': | |
1830 | yylval.code = PLUS_EXPR; break; | |
1831 | case '-': | |
1832 | yylval.code = MINUS_EXPR; break; | |
1833 | case '&': | |
1834 | yylval.code = BIT_AND_EXPR; break; | |
1835 | case '|': | |
1836 | yylval.code = BIT_IOR_EXPR; break; | |
1837 | case '*': | |
1838 | yylval.code = MULT_EXPR; break; | |
1839 | case '/': | |
1840 | yylval.code = TRUNC_DIV_EXPR; break; | |
1841 | case '%': | |
1842 | yylval.code = TRUNC_MOD_EXPR; break; | |
1843 | case '^': | |
1844 | yylval.code = BIT_XOR_EXPR; break; | |
1845 | case LSHIFT: | |
1846 | yylval.code = LSHIFT_EXPR; break; | |
1847 | case RSHIFT: | |
1848 | yylval.code = RSHIFT_EXPR; break; | |
1849 | case '<': | |
1850 | yylval.code = LT_EXPR; break; | |
1851 | case '>': | |
1852 | yylval.code = GT_EXPR; break; | |
1853 | } | |
1854 | ||
1855 | token_buffer[1] = c1 = getc (finput); | |
1856 | token_buffer[2] = 0; | |
1857 | ||
1858 | if (c1 == '=') | |
1859 | { | |
1860 | switch (c) | |
1861 | { | |
1862 | case '<': | |
1863 | value = ARITHCOMPARE; yylval.code = LE_EXPR; goto done; | |
1864 | case '>': | |
1865 | value = ARITHCOMPARE; yylval.code = GE_EXPR; goto done; | |
1866 | case '!': | |
1867 | value = EQCOMPARE; yylval.code = NE_EXPR; goto done; | |
1868 | case '=': | |
1869 | value = EQCOMPARE; yylval.code = EQ_EXPR; goto done; | |
1870 | } | |
1871 | value = ASSIGN; goto done; | |
1872 | } | |
1873 | else if (c == c1) | |
1874 | switch (c) | |
1875 | { | |
1876 | case '+': | |
1877 | value = PLUSPLUS; goto done; | |
1878 | case '-': | |
1879 | value = MINUSMINUS; goto done; | |
1880 | case '&': | |
1881 | value = ANDAND; goto done; | |
1882 | case '|': | |
1883 | value = OROR; goto done; | |
1884 | case '<': | |
1885 | c = LSHIFT; | |
1886 | goto combine; | |
1887 | case '>': | |
1888 | c = RSHIFT; | |
1889 | goto combine; | |
1890 | } | |
1891 | else if ((c == '-') && (c1 == '>')) | |
1892 | { value = POINTSAT; goto done; } | |
1893 | ungetc (c1, finput); | |
1894 | token_buffer[1] = 0; | |
1895 | ||
1896 | if ((c == '<') || (c == '>')) | |
1897 | value = ARITHCOMPARE; | |
1898 | else value = c; | |
1899 | goto done; | |
1900 | } | |
1901 | ||
1902 | case 0: | |
1903 | /* Don't make yyparse think this is eof. */ | |
1904 | value = 1; | |
1905 | break; | |
1906 | ||
1907 | default: | |
1908 | value = c; | |
1909 | } | |
1910 | ||
1911 | done: | |
1912 | /* yylloc.last_line = lineno; */ | |
1913 | ||
1914 | return value; | |
1915 | } | |
1916 | ||
d45cf215 | 1917 | /* Sets the value of the 'yydebug' variable to VALUE. |
e8bbfc4e RK |
1918 | This is a function so we don't have to have YYDEBUG defined |
1919 | in order to build the compiler. */ | |
1920 | ||
1921 | void | |
1922 | set_yydebug (value) | |
1923 | int value; | |
1924 | { | |
1925 | #if YYDEBUG != 0 | |
1926 | yydebug = value; | |
1927 | #else | |
1928 | warning ("YYDEBUG not defined."); | |
1929 | #endif | |
1930 | } |