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6de1e2a9 | 1 | /* Part of CPP library. (Macro handling.) |
5e7b4e25 JL |
2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1998, |
3 | 1999, 2000 Free Software Foundation, Inc. | |
7f2935c7 | 4 | Written by Per Bothner, 1994. |
38e01259 | 5 | Based on CCCP program by Paul Rubin, June 1986 |
7f2935c7 PB |
6 | Adapted to ANSI C, Richard Stallman, Jan 1987 |
7 | ||
8 | This program is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by the | |
10 | Free Software Foundation; either version 2, or (at your option) any | |
11 | later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
940d9d63 | 20 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
7f2935c7 PB |
21 | |
22 | In other words, you are welcome to use, share and improve this program. | |
23 | You are forbidden to forbid anyone else to use, share and improve | |
24 | what you give them. Help stamp out software-hoarding! */ | |
25 | ||
b04cd507 KG |
26 | #include "config.h" |
27 | #include "system.h" | |
7f2935c7 PB |
28 | #include "cpplib.h" |
29 | #include "cpphash.h" | |
d35364d1 | 30 | #include "hashtab.h" |
34ca9541 | 31 | #undef abort |
7f2935c7 | 32 | |
d35364d1 ZW |
33 | static unsigned int hash_HASHNODE PARAMS ((const void *)); |
34 | static int eq_HASHNODE PARAMS ((const void *, const void *)); | |
35 | static void del_HASHNODE PARAMS ((void *)); | |
1a7b4c69 | 36 | static int dump_hash_helper PARAMS ((void **, void *)); |
d35364d1 | 37 | |
6de1e2a9 ZW |
38 | static int comp_def_part PARAMS ((int, U_CHAR *, int, U_CHAR *, |
39 | int, int)); | |
6de1e2a9 ZW |
40 | static void push_macro_expansion PARAMS ((cpp_reader *, |
41 | U_CHAR *, int, HASHNODE *)); | |
455d2586 | 42 | static int unsafe_chars PARAMS ((cpp_reader *, int, int)); |
bcc5cac9 KG |
43 | static int macro_cleanup PARAMS ((cpp_buffer *, cpp_reader *)); |
44 | static enum cpp_token macarg PARAMS ((cpp_reader *, int)); | |
45 | static struct tm *timestamp PARAMS ((cpp_reader *)); | |
46 | static void special_symbol PARAMS ((HASHNODE *, cpp_reader *)); | |
47 | ||
6de1e2a9 ZW |
48 | #define CPP_IS_MACRO_BUFFER(PBUF) ((PBUF)->data != NULL) |
49 | #define FORWARD(N) CPP_FORWARD (CPP_BUFFER (pfile), (N)) | |
ba412f14 | 50 | #define PEEKC() CPP_BUF_PEEK (CPP_BUFFER (pfile)) |
6de1e2a9 | 51 | |
d35364d1 ZW |
52 | /* Initial hash table size. (It can grow if necessary - see hashtab.c.) */ |
53 | #define HASHSIZE 500 | |
54 | ||
6de1e2a9 ZW |
55 | /* The arglist structure is built by create_definition to tell |
56 | collect_expansion where the argument names begin. That | |
57 | is, for a define like "#define f(x,y,z) foo+x-bar*y", the arglist | |
58 | would contain pointers to the strings x, y, and z. | |
59 | collect_expansion would then build a DEFINITION node, | |
60 | with reflist nodes pointing to the places x, y, and z had | |
61 | appeared. So the arglist is just convenience data passed | |
62 | between these two routines. It is not kept around after | |
63 | the current #define has been processed and entered into the | |
64 | hash table. */ | |
65 | ||
ba412f14 | 66 | struct arg |
6de1e2a9 | 67 | { |
6de1e2a9 | 68 | U_CHAR *name; |
ba412f14 ZW |
69 | int len; |
70 | char rest_arg; | |
71 | }; | |
72 | ||
73 | struct arglist | |
74 | { | |
75 | U_CHAR *namebuf; | |
76 | struct arg *argv; | |
77 | int argc; | |
6de1e2a9 ZW |
78 | }; |
79 | ||
ba412f14 ZW |
80 | |
81 | static DEFINITION *collect_expansion PARAMS ((cpp_reader *, struct arglist *)); | |
82 | static struct arglist *collect_formal_parameters PARAMS ((cpp_reader *)); | |
bcc5cac9 | 83 | |
6de1e2a9 ZW |
84 | /* This structure represents one parsed argument in a macro call. |
85 | `raw' points to the argument text as written (`raw_length' is its length). | |
86 | `expanded' points to the argument's macro-expansion | |
87 | (its length is `expand_length'). | |
88 | `stringified_length' is the length the argument would have | |
4571dc27 | 89 | if stringified. */ |
6de1e2a9 ZW |
90 | |
91 | /* raw and expanded are relative to ARG_BASE */ | |
92 | #define ARG_BASE ((pfile)->token_buffer) | |
93 | ||
94 | struct argdata | |
95 | { | |
96 | /* Strings relative to pfile->token_buffer */ | |
97 | long raw, expanded, stringified; | |
98 | int raw_length, expand_length; | |
99 | int stringified_length; | |
6de1e2a9 ZW |
100 | }; |
101 | ||
29a72a4f ZW |
102 | /* Calculate hash of a string of length LEN. */ |
103 | unsigned int | |
104 | _cpp_calc_hash (str, len) | |
105 | const U_CHAR *str; | |
106 | size_t len; | |
7f2935c7 | 107 | { |
29a72a4f ZW |
108 | size_t n = len; |
109 | unsigned int r = 0; | |
7f2935c7 | 110 | |
bb52fa7f | 111 | do |
29a72a4f | 112 | r = r * 67 + (*str++ - 113); |
bb52fa7f ZW |
113 | while (--n); |
114 | return r + len; | |
7f2935c7 PB |
115 | } |
116 | ||
29a72a4f ZW |
117 | /* Calculate hash of a HASHNODE structure. */ |
118 | static unsigned int | |
119 | hash_HASHNODE (x) | |
120 | const void *x; | |
121 | { | |
122 | const HASHNODE *h = (const HASHNODE *)x; | |
123 | return h->hash; | |
124 | } | |
125 | ||
d35364d1 ZW |
126 | /* Compare two HASHNODE structures. */ |
127 | static int | |
128 | eq_HASHNODE (x, y) | |
129 | const void *x; | |
130 | const void *y; | |
131 | { | |
132 | const HASHNODE *a = (const HASHNODE *)x; | |
133 | const HASHNODE *b = (const HASHNODE *)y; | |
134 | ||
135 | return (a->length == b->length | |
136 | && !strncmp (a->name, b->name, a->length)); | |
137 | } | |
138 | ||
139 | /* Destroy a HASHNODE. */ | |
140 | static void | |
141 | del_HASHNODE (x) | |
142 | void *x; | |
143 | { | |
144 | HASHNODE *h = (HASHNODE *)x; | |
145 | ||
146 | if (h->type == T_MACRO) | |
147 | _cpp_free_definition (h->value.defn); | |
148 | free ((void *) h->name); | |
149 | free (h); | |
150 | } | |
151 | ||
152 | /* Allocate and initialize a HASHNODE structure. | |
153 | Caller must fill in the value field. */ | |
154 | ||
155 | HASHNODE * | |
156 | _cpp_make_hashnode (name, len, type, hash) | |
157 | const U_CHAR *name; | |
158 | size_t len; | |
159 | enum node_type type; | |
160 | unsigned long hash; | |
161 | { | |
162 | HASHNODE *hp = (HASHNODE *) xmalloc (sizeof (HASHNODE)); | |
163 | U_CHAR *p = xmalloc (len + 1); | |
164 | ||
165 | hp->type = type; | |
166 | hp->length = len; | |
167 | hp->name = p; | |
168 | hp->hash = hash; | |
169 | ||
170 | memcpy (p, name, len); | |
171 | p[len] = 0; | |
172 | ||
173 | return hp; | |
174 | } | |
175 | ||
176 | /* Find the hash node for name "name", which ends at the first | |
177 | non-identifier char. | |
0f41302f MS |
178 | |
179 | If LEN is >= 0, it is the length of the name. | |
d35364d1 | 180 | Otherwise, compute the length now. */ |
0f41302f | 181 | |
7f2935c7 | 182 | HASHNODE * |
b0699dad | 183 | _cpp_lookup (pfile, name, len) |
bb52fa7f | 184 | cpp_reader *pfile; |
7f2935c7 PB |
185 | const U_CHAR *name; |
186 | int len; | |
7f2935c7 | 187 | { |
d35364d1 ZW |
188 | const U_CHAR *bp; |
189 | HASHNODE dummy; | |
7f2935c7 PB |
190 | |
191 | if (len < 0) | |
192 | { | |
203588e7 | 193 | for (bp = name; is_idchar (*bp); bp++); |
7f2935c7 PB |
194 | len = bp - name; |
195 | } | |
196 | ||
d35364d1 ZW |
197 | dummy.name = name; |
198 | dummy.length = len; | |
29a72a4f | 199 | dummy.hash = _cpp_calc_hash (name, len); |
d35364d1 | 200 | |
29a72a4f ZW |
201 | return (HASHNODE *) htab_find_with_hash (pfile->hashtab, |
202 | (void *)&dummy, dummy.hash); | |
d35364d1 ZW |
203 | } |
204 | ||
205 | /* Find the hashtable slot for name "name". Used to insert or delete. */ | |
206 | HASHNODE ** | |
207 | _cpp_lookup_slot (pfile, name, len, insert, hash) | |
208 | cpp_reader *pfile; | |
209 | const U_CHAR *name; | |
210 | int len; | |
211 | int insert; | |
212 | unsigned long *hash; | |
213 | { | |
214 | const U_CHAR *bp; | |
215 | HASHNODE dummy; | |
216 | HASHNODE **slot; | |
7f2935c7 | 217 | |
d35364d1 | 218 | if (len < 0) |
6de1e2a9 | 219 | { |
d35364d1 ZW |
220 | for (bp = name; is_idchar (*bp); bp++); |
221 | len = bp - name; | |
6de1e2a9 | 222 | } |
d35364d1 ZW |
223 | |
224 | dummy.name = name; | |
225 | dummy.length = len; | |
29a72a4f | 226 | dummy.hash = _cpp_calc_hash (name, len); |
d35364d1 | 227 | |
29a72a4f ZW |
228 | slot = (HASHNODE **) htab_find_slot_with_hash (pfile->hashtab, |
229 | (void *)&dummy, | |
230 | dummy.hash, insert); | |
d35364d1 ZW |
231 | if (insert) |
232 | *hash = dummy.hash; | |
233 | return slot; | |
234 | } | |
235 | ||
236 | /* Init the hash table. In here so it can see the hash and eq functions. */ | |
237 | void | |
238 | _cpp_init_macro_hash (pfile) | |
239 | cpp_reader *pfile; | |
240 | { | |
241 | pfile->hashtab = htab_create (HASHSIZE, hash_HASHNODE, | |
242 | eq_HASHNODE, del_HASHNODE); | |
7f2935c7 PB |
243 | } |
244 | ||
cf4ed945 ZW |
245 | /* Free a DEFINITION structure. Used by delete_macro, and by |
246 | do_define when redefining macros. */ | |
247 | ||
248 | void | |
b0699dad | 249 | _cpp_free_definition (d) |
cf4ed945 ZW |
250 | DEFINITION *d; |
251 | { | |
252 | struct reflist *ap, *nextap; | |
253 | ||
254 | for (ap = d->pattern; ap != NULL; ap = nextap) | |
255 | { | |
256 | nextap = ap->next; | |
257 | free (ap); | |
258 | } | |
259 | if (d->nargs >= 0) | |
260 | free (d->argnames); | |
261 | free (d); | |
262 | } | |
263 | ||
6de1e2a9 ZW |
264 | static int |
265 | macro_cleanup (pbuf, pfile) | |
266 | cpp_buffer *pbuf; | |
267 | cpp_reader *pfile ATTRIBUTE_UNUSED; | |
268 | { | |
269 | HASHNODE *macro = (HASHNODE *) pbuf->data; | |
270 | if (macro->type == T_DISABLED) | |
271 | macro->type = T_MACRO; | |
272 | if (macro->type != T_MACRO || pbuf->buf != macro->value.defn->expansion) | |
7ceb3598 | 273 | free ((PTR) pbuf->buf); |
6de1e2a9 ZW |
274 | return 0; |
275 | } | |
276 | ||
ba412f14 ZW |
277 | /* Read a replacement list for a macro, and build the DEFINITION |
278 | structure. ARGLIST specifies the formal parameters to look for in | |
279 | the text of the definition. If ARGLIST is null, this is an | |
280 | object-like macro; if it points to an empty arglist, this is a | |
281 | function-like macro with no arguments. | |
282 | ||
283 | A good half of this is devoted to supporting -traditional. | |
284 | Kill me now. */ | |
6de1e2a9 ZW |
285 | |
286 | static DEFINITION * | |
ba412f14 | 287 | collect_expansion (pfile, arglist) |
6de1e2a9 | 288 | cpp_reader *pfile; |
6de1e2a9 ZW |
289 | struct arglist *arglist; |
290 | { | |
291 | DEFINITION *defn; | |
ba412f14 ZW |
292 | struct reflist *pat = 0, *endpat = 0; |
293 | enum cpp_token token; | |
294 | long start, here, last; | |
295 | int i; | |
296 | int argc; | |
297 | size_t len; | |
298 | struct arg *argv; | |
299 | U_CHAR *tok, *exp; | |
300 | enum { START = 0, NORM, ARG, STRIZE, PASTE } last_token = START; | |
301 | ||
302 | if (arglist) | |
34ca9541 | 303 | { |
ba412f14 ZW |
304 | argv = arglist->argv; |
305 | argc = arglist->argc; | |
34ca9541 | 306 | } |
ba412f14 | 307 | else |
6de1e2a9 | 308 | { |
ba412f14 ZW |
309 | argv = 0; |
310 | argc = 0; | |
6de1e2a9 ZW |
311 | } |
312 | ||
ba412f14 ZW |
313 | last = start = CPP_WRITTEN (pfile); |
314 | last -= 2; /* two extra chars for the leading escape */ | |
315 | for (;;) | |
6de1e2a9 | 316 | { |
45b966db | 317 | /* We use cpp_get_token because _cpp_get_directive_token would |
ba412f14 ZW |
318 | discard whitespace and we can't cope with that yet. Macro |
319 | expansion is off, so we are guaranteed not to see POP or EOF. */ | |
6de1e2a9 | 320 | |
ba412f14 | 321 | while (PEEKC () == '\r') |
6de1e2a9 | 322 | { |
ba412f14 ZW |
323 | FORWARD (1); |
324 | CPP_BUMP_LINE (pfile); | |
6de1e2a9 | 325 | } |
ba412f14 ZW |
326 | if (PEEKC () == '\n') |
327 | goto done; | |
328 | here = CPP_WRITTEN (pfile); | |
329 | token = cpp_get_token (pfile); | |
330 | tok = pfile->token_buffer + here; | |
331 | switch (token) | |
6de1e2a9 | 332 | { |
ba412f14 ZW |
333 | case CPP_POP: |
334 | case CPP_EOF: | |
335 | case CPP_VSPACE: | |
336 | cpp_ice (pfile, "EOF or VSPACE in collect_expansion"); | |
337 | goto done; | |
338 | ||
339 | case CPP_HSPACE: | |
340 | if (last_token == STRIZE || last_token == PASTE | |
341 | || last_token == START) | |
342 | CPP_SET_WRITTEN (pfile, here); | |
343 | break; | |
6de1e2a9 | 344 | |
ba412f14 | 345 | case CPP_STRINGIZE: |
29a72a4f ZW |
346 | /* # is not special in object-like macros. It is special in |
347 | function-like macros with no args. (6.10.3.2 para 1.) */ | |
348 | if (arglist == NULL) | |
349 | goto norm; | |
350 | /* # is not special immediately after PASTE. | |
351 | (Implied by 6.10.3.3 para 4.) */ | |
ba412f14 | 352 | if (last_token == PASTE) |
ba412f14 ZW |
353 | goto norm; |
354 | last_token = STRIZE; | |
355 | CPP_SET_WRITTEN (pfile, here); /* delete from replacement text */ | |
356 | break; | |
6de1e2a9 | 357 | |
ba412f14 ZW |
358 | case CPP_TOKPASTE: |
359 | /* If the last token was an argument, discard this token and | |
360 | any hspace between it and the argument's position. Then | |
361 | mark the arg raw_after. */ | |
362 | if (last_token == ARG) | |
363 | { | |
364 | endpat->raw_after = 1; | |
365 | last_token = PASTE; | |
366 | CPP_SET_WRITTEN (pfile, last); | |
6de1e2a9 ZW |
367 | break; |
368 | } | |
ba412f14 ZW |
369 | else if (last_token == PASTE) |
370 | /* ## ## - the second ## is ordinary. */ | |
371 | goto norm; | |
7d26bd16 JM |
372 | else if (last_token == START) |
373 | cpp_error (pfile, "`##' at start of macro definition"); | |
ba412f14 ZW |
374 | |
375 | /* Discard the token and any hspace before it. */ | |
376 | while (is_hspace (pfile->token_buffer[here-1])) | |
377 | here--; | |
378 | CPP_SET_WRITTEN (pfile, here); | |
379 | ||
380 | if (last_token == STRIZE) | |
381 | /* Oops - that wasn't a stringify operator. */ | |
382 | CPP_PUTC (pfile, '#'); | |
383 | last_token = PASTE; | |
384 | break; | |
6de1e2a9 | 385 | |
ba412f14 ZW |
386 | case CPP_COMMENT: |
387 | /* We must be in -traditional mode. Pretend this was a | |
388 | token paste, but only if there was no leading or | |
29a72a4f | 389 | trailing space and it's in the middle of the line. */ |
ba412f14 | 390 | CPP_SET_WRITTEN (pfile, here); |
29a72a4f ZW |
391 | if (last_token == START) |
392 | break; | |
ba412f14 ZW |
393 | if (is_hspace (pfile->token_buffer[here-1])) |
394 | break; | |
395 | if (is_hspace (PEEKC ())) | |
396 | break; | |
29a72a4f ZW |
397 | if (PEEKC () == '\n') |
398 | break; | |
ba412f14 ZW |
399 | if (last_token == ARG) |
400 | endpat->raw_after = 1; | |
401 | last_token = PASTE; | |
402 | break; | |
6de1e2a9 | 403 | |
ba412f14 ZW |
404 | case CPP_STRING: |
405 | case CPP_CHAR: | |
406 | if (last_token == STRIZE) | |
407 | cpp_error (pfile, "`#' is not followed by a macro argument name"); | |
6de1e2a9 | 408 | |
ae79697b | 409 | if (CPP_TRADITIONAL (pfile) || CPP_OPTION (pfile, warn_stringify)) |
ba412f14 ZW |
410 | goto maybe_trad_stringify; |
411 | else | |
412 | goto norm; | |
413 | ||
414 | case CPP_NAME: | |
415 | for (i = 0; i < argc; i++) | |
416 | if (!strncmp (tok, argv[i].name, argv[i].len) | |
417 | && ! is_idchar (tok[argv[i].len])) | |
418 | goto addref; | |
419 | ||
420 | /* fall through */ | |
421 | default: | |
422 | norm: | |
423 | if (last_token == STRIZE) | |
424 | cpp_error (pfile, "`#' is not followed by a macro argument name"); | |
425 | last_token = NORM; | |
426 | break; | |
427 | } | |
428 | continue; | |
6de1e2a9 | 429 | |
ba412f14 ZW |
430 | addref: |
431 | { | |
432 | struct reflist *tpat; | |
433 | ||
434 | /* Make a pat node for this arg and add it to the pat list */ | |
435 | tpat = (struct reflist *) xmalloc (sizeof (struct reflist)); | |
436 | tpat->next = NULL; | |
437 | tpat->raw_before = (last_token == PASTE); | |
438 | tpat->raw_after = 0; | |
439 | tpat->stringify = (last_token == STRIZE); | |
440 | tpat->rest_args = argv[i].rest_arg; | |
441 | tpat->argno = i; | |
442 | tpat->nchars = here - last; | |
443 | ||
444 | if (endpat == NULL) | |
445 | pat = tpat; | |
446 | else | |
447 | endpat->next = tpat; | |
448 | endpat = tpat; | |
449 | last = here; | |
450 | } | |
451 | CPP_SET_WRITTEN (pfile, here); /* discard arg name */ | |
452 | last_token = ARG; | |
453 | continue; | |
6de1e2a9 | 454 | |
ba412f14 | 455 | maybe_trad_stringify: |
c45da1ca | 456 | last_token = NORM; |
ba412f14 ZW |
457 | { |
458 | U_CHAR *base, *p, *limit; | |
459 | struct reflist *tpat; | |
6de1e2a9 | 460 | |
ba412f14 ZW |
461 | base = p = pfile->token_buffer + here; |
462 | limit = CPP_PWRITTEN (pfile); | |
463 | ||
464 | while (++p < limit) | |
465 | { | |
466 | if (is_idstart (*p)) | |
467 | continue; | |
468 | for (i = 0; i < argc; i++) | |
469 | if (!strncmp (tok, argv[i].name, argv[i].len) | |
470 | && ! is_idchar (tok[argv[i].len])) | |
471 | goto mts_addref; | |
472 | continue; | |
473 | ||
474 | mts_addref: | |
475 | if (!CPP_TRADITIONAL (pfile)) | |
476 | { | |
477 | /* Must have got here because of -Wtraditional. */ | |
478 | cpp_warning (pfile, | |
479 | "macro argument `%.*s' would be stringified with -traditional", | |
480 | (int) argv[i].len, argv[i].name); | |
481 | continue; | |
482 | } | |
ae79697b | 483 | if (CPP_OPTION (pfile, warn_stringify)) |
ba412f14 ZW |
484 | cpp_warning (pfile, "macro argument `%.*s' is stringified", |
485 | (int) argv[i].len, argv[i].name); | |
486 | ||
487 | /* Remove the argument from the string. */ | |
488 | memmove (p, p + argv[i].len, limit - (p + argv[i].len)); | |
489 | limit -= argv[i].len; | |
490 | ||
491 | /* Make a pat node for this arg and add it to the pat list */ | |
492 | tpat = (struct reflist *) xmalloc (sizeof (struct reflist)); | |
493 | tpat->next = NULL; | |
494 | ||
495 | /* Don't attempt to paste this with anything. */ | |
496 | tpat->raw_before = 0; | |
497 | tpat->raw_after = 0; | |
498 | tpat->stringify = 1; | |
499 | tpat->rest_args = argv[i].rest_arg; | |
500 | tpat->argno = i; | |
501 | tpat->nchars = (p - base) + here - last; | |
502 | ||
503 | if (endpat == NULL) | |
504 | pat = tpat; | |
505 | else | |
506 | endpat->next = tpat; | |
507 | endpat = tpat; | |
508 | last = (p - base) + here; | |
509 | } | |
510 | CPP_ADJUST_WRITTEN (pfile, CPP_PWRITTEN (pfile) - limit); | |
511 | } | |
512 | } | |
513 | done: | |
514 | ||
515 | if (last_token == STRIZE) | |
516 | cpp_error (pfile, "`#' is not followed by a macro argument name"); | |
517 | else if (last_token == PASTE) | |
518 | cpp_error (pfile, "`##' at end of macro definition"); | |
519 | ||
c45da1ca ZW |
520 | if (last_token == START) |
521 | { | |
522 | /* Empty macro definition. */ | |
7ceb3598 | 523 | exp = (U_CHAR *) xstrdup ("\r \r "); |
c45da1ca ZW |
524 | len = 1; |
525 | } | |
526 | else | |
527 | { | |
528 | /* Trim trailing white space from definition. */ | |
529 | here = CPP_WRITTEN (pfile); | |
530 | while (here > last && is_hspace (pfile->token_buffer [here-1])) | |
531 | here--; | |
532 | CPP_SET_WRITTEN (pfile, here); | |
c45da1ca ZW |
533 | CPP_NUL_TERMINATE (pfile); |
534 | len = CPP_WRITTEN (pfile) - start + 1; | |
7ceb3598 NB |
535 | /* space for no-concat markers at either end */ |
536 | exp = (U_CHAR *) xmalloc (len + 4); | |
c45da1ca ZW |
537 | exp[0] = '\r'; |
538 | exp[1] = ' '; | |
539 | exp[len + 1] = '\r'; | |
540 | exp[len + 2] = ' '; | |
541 | exp[len + 3] = '\0'; | |
542 | memcpy (&exp[2], pfile->token_buffer + start, len - 1); | |
543 | } | |
544 | ||
ba412f14 ZW |
545 | CPP_SET_WRITTEN (pfile, start); |
546 | ||
547 | defn = (DEFINITION *) xmalloc (sizeof (DEFINITION)); | |
548 | defn->length = len + 3; | |
549 | defn->expansion = exp; | |
550 | defn->pattern = pat; | |
551 | defn->rest_args = 0; | |
552 | if (arglist) | |
553 | { | |
554 | defn->nargs = argc; | |
555 | defn->argnames = arglist->namebuf; | |
556 | if (argv) | |
557 | { | |
558 | defn->rest_args = argv[argc - 1].rest_arg; | |
559 | free (argv); | |
6de1e2a9 | 560 | } |
ba412f14 | 561 | free (arglist); |
6de1e2a9 | 562 | } |
ba412f14 | 563 | else |
6de1e2a9 | 564 | { |
ba412f14 ZW |
565 | defn->nargs = -1; |
566 | defn->argnames = 0; | |
567 | defn->rest_args = 0; | |
6de1e2a9 | 568 | } |
6de1e2a9 ZW |
569 | return defn; |
570 | } | |
571 | ||
ba412f14 ZW |
572 | static struct arglist * |
573 | collect_formal_parameters (pfile) | |
6de1e2a9 | 574 | cpp_reader *pfile; |
6de1e2a9 | 575 | { |
ba412f14 ZW |
576 | struct arglist *result = 0; |
577 | struct arg *argv = 0; | |
38b24ee2 | 578 | U_CHAR *namebuf = (U_CHAR *) xstrdup (""); |
6de1e2a9 | 579 | |
ba412f14 ZW |
580 | U_CHAR *name, *tok; |
581 | size_t argslen = 1; | |
582 | int len; | |
583 | int argc = 0; | |
584 | int i; | |
585 | enum cpp_token token; | |
586 | long old_written; | |
6de1e2a9 | 587 | |
ba412f14 | 588 | old_written = CPP_WRITTEN (pfile); |
45b966db | 589 | token = _cpp_get_directive_token (pfile); |
ba412f14 ZW |
590 | if (token != CPP_LPAREN) |
591 | { | |
592 | cpp_ice (pfile, "first token = %d not %d in collect_formal_parameters", | |
593 | token, CPP_LPAREN); | |
594 | goto invalid; | |
595 | } | |
6de1e2a9 | 596 | |
ba412f14 ZW |
597 | argv = (struct arg *) xmalloc (sizeof (struct arg)); |
598 | argv[argc].len = 0; | |
599 | argv[argc].rest_arg = 0; | |
600 | for (;;) | |
601 | { | |
602 | CPP_SET_WRITTEN (pfile, old_written); | |
45b966db | 603 | token = _cpp_get_directive_token (pfile); |
ba412f14 ZW |
604 | switch (token) |
605 | { | |
606 | case CPP_NAME: | |
607 | tok = pfile->token_buffer + old_written; | |
608 | len = CPP_PWRITTEN (pfile) - tok; | |
609 | if (namebuf | |
7ceb3598 | 610 | && (name = (U_CHAR *) strstr (namebuf, tok)) |
ba412f14 ZW |
611 | && name[len] == ',' |
612 | && (name == namebuf || name[-1] == ',')) | |
613 | { | |
614 | cpp_error (pfile, "duplicate macro argument name `%s'", tok); | |
615 | continue; | |
616 | } | |
ae79697b | 617 | if (CPP_PEDANTIC (pfile) && CPP_OPTION (pfile, c99) |
1690826f AO |
618 | && len == sizeof "__VA_ARGS__" - 1 |
619 | && !strncmp (tok, "__VA_ARGS__", len)) | |
38b24ee2 ZW |
620 | cpp_pedwarn (pfile, |
621 | "C99 does not permit use of `__VA_ARGS__' as a macro argument name"); | |
7ceb3598 | 622 | namebuf = (U_CHAR *) xrealloc (namebuf, argslen + len + 1); |
ba412f14 ZW |
623 | name = &namebuf[argslen - 1]; |
624 | argslen += len + 1; | |
625 | ||
626 | memcpy (name, tok, len); | |
627 | name[len] = ','; | |
628 | name[len+1] = '\0'; | |
629 | argv[argc].len = len; | |
630 | argv[argc].rest_arg = 0; | |
631 | break; | |
6de1e2a9 | 632 | |
ba412f14 ZW |
633 | case CPP_COMMA: |
634 | argc++; | |
7ceb3598 | 635 | argv = (struct arg *) xrealloc (argv, (argc + 1)*sizeof(struct arg)); |
ba412f14 ZW |
636 | argv[argc].len = 0; |
637 | break; | |
6de1e2a9 | 638 | |
ba412f14 ZW |
639 | case CPP_RPAREN: |
640 | goto done; | |
6de1e2a9 | 641 | |
ba412f14 ZW |
642 | case CPP_3DOTS: |
643 | goto rest_arg; | |
6de1e2a9 | 644 | |
ba412f14 ZW |
645 | case CPP_VSPACE: |
646 | cpp_error (pfile, "missing right paren in macro argument list"); | |
647 | goto invalid; | |
6de1e2a9 | 648 | |
ba412f14 ZW |
649 | default: |
650 | cpp_error (pfile, "syntax error in #define"); | |
651 | goto invalid; | |
652 | } | |
653 | } | |
6de1e2a9 | 654 | |
ba412f14 ZW |
655 | rest_arg: |
656 | /* There are two possible styles for a vararg macro: | |
657 | the C99 way: #define foo(a, ...) a, __VA_ARGS__ | |
658 | the gnu way: #define foo(a, b...) a, b | |
659 | The C99 way can be considered a special case of the gnu way. | |
660 | There are also some constraints to worry about, but we'll handle | |
661 | those elsewhere. */ | |
662 | if (argv[argc].len == 0) | |
663 | { | |
ae79697b | 664 | if (CPP_PEDANTIC (pfile) && ! CPP_OPTION (pfile, c99)) |
ba412f14 | 665 | cpp_pedwarn (pfile, "C89 does not permit varargs macros"); |
6de1e2a9 | 666 | |
ba412f14 | 667 | len = sizeof "__VA_ARGS__" - 1; |
7ceb3598 | 668 | namebuf = (U_CHAR *) xrealloc (namebuf, argslen + len + 1); |
ba412f14 ZW |
669 | name = &namebuf[argslen - 1]; |
670 | argslen += len; | |
671 | memcpy (name, "__VA_ARGS__", len); | |
ba412f14 ZW |
672 | argv[argc].len = len; |
673 | } | |
674 | else | |
675 | if (CPP_PEDANTIC (pfile)) | |
676 | cpp_pedwarn (pfile, "ISO C does not permit named varargs macros"); | |
677 | ||
678 | argv[argc].rest_arg = 1; | |
ba412f14 | 679 | |
45b966db | 680 | token = _cpp_get_directive_token (pfile); |
ba412f14 ZW |
681 | if (token != CPP_RPAREN) |
682 | { | |
683 | cpp_error (pfile, "another parameter follows `...'"); | |
684 | goto invalid; | |
685 | } | |
6de1e2a9 | 686 | |
ba412f14 ZW |
687 | done: |
688 | /* Go through argv and fix up the pointers. */ | |
689 | len = 0; | |
690 | for (i = 0; i <= argc; i++) | |
691 | { | |
692 | argv[i].name = namebuf + len; | |
693 | len += argv[i].len + 1; | |
38b24ee2 | 694 | namebuf[len - 1] = '\0'; |
ba412f14 | 695 | } |
6de1e2a9 | 696 | |
ba412f14 | 697 | CPP_SET_WRITTEN (pfile, old_written); |
6de1e2a9 | 698 | |
ba412f14 ZW |
699 | result = (struct arglist *) xmalloc (sizeof (struct arglist)); |
700 | if (namebuf[0] != '\0') | |
701 | { | |
702 | result->namebuf = namebuf; | |
703 | result->argc = argc + 1; | |
704 | result->argv = argv; | |
6de1e2a9 ZW |
705 | } |
706 | else | |
707 | { | |
ba412f14 ZW |
708 | free (namebuf); |
709 | result->namebuf = 0; | |
710 | result->argc = 0; | |
711 | result->argv = 0; | |
712 | } | |
6de1e2a9 | 713 | |
ba412f14 ZW |
714 | return result; |
715 | ||
716 | invalid: | |
717 | if (argv) | |
718 | free (argv); | |
719 | if (namebuf) | |
720 | free (namebuf); | |
721 | return 0; | |
722 | } | |
723 | ||
724 | /* Create a DEFINITION node for a macro. The reader's point is just | |
725 | after the macro name. If FUNLIKE is true, this is a function-like | |
726 | macro. */ | |
727 | ||
728 | DEFINITION * | |
b0699dad | 729 | _cpp_create_definition (pfile, funlike) |
ba412f14 ZW |
730 | cpp_reader *pfile; |
731 | int funlike; | |
732 | { | |
733 | struct arglist *args = 0; | |
734 | long line, col; | |
735 | const char *file; | |
736 | DEFINITION *defn; | |
737 | ||
738 | cpp_buf_line_and_col (CPP_BUFFER (pfile), &line, &col); | |
739 | file = CPP_BUFFER (pfile)->nominal_fname; | |
740 | ||
741 | pfile->no_macro_expand++; | |
742 | pfile->parsing_define_directive++; | |
ae79697b ZW |
743 | CPP_OPTION (pfile, discard_comments)++; |
744 | CPP_OPTION (pfile, no_line_commands)++; | |
ba412f14 ZW |
745 | |
746 | if (funlike) | |
747 | { | |
748 | args = collect_formal_parameters (pfile); | |
749 | if (args == 0) | |
750 | goto err; | |
6de1e2a9 ZW |
751 | } |
752 | ||
ba412f14 ZW |
753 | defn = collect_expansion (pfile, args); |
754 | if (defn == 0) | |
755 | goto err; | |
756 | ||
6de1e2a9 ZW |
757 | defn->line = line; |
758 | defn->file = file; | |
ba412f14 | 759 | defn->col = col; |
6de1e2a9 | 760 | |
ba412f14 ZW |
761 | pfile->no_macro_expand--; |
762 | pfile->parsing_define_directive--; | |
ae79697b ZW |
763 | CPP_OPTION (pfile, discard_comments)--; |
764 | CPP_OPTION (pfile, no_line_commands)--; | |
ba412f14 | 765 | return defn; |
6de1e2a9 | 766 | |
ba412f14 ZW |
767 | err: |
768 | pfile->no_macro_expand--; | |
769 | pfile->parsing_define_directive--; | |
ae79697b ZW |
770 | CPP_OPTION (pfile, discard_comments)--; |
771 | CPP_OPTION (pfile, no_line_commands)--; | |
ba412f14 | 772 | return 0; |
6de1e2a9 ZW |
773 | } |
774 | ||
775 | /* | |
776 | * Parse a macro argument and append the info on PFILE's token_buffer. | |
777 | * REST_ARGS means to absorb the rest of the args. | |
778 | * Return nonzero to indicate a syntax error. | |
779 | */ | |
780 | ||
781 | static enum cpp_token | |
782 | macarg (pfile, rest_args) | |
783 | cpp_reader *pfile; | |
784 | int rest_args; | |
785 | { | |
786 | int paren = 0; | |
787 | enum cpp_token token; | |
6de1e2a9 ZW |
788 | |
789 | /* Try to parse as much of the argument as exists at this | |
790 | input stack level. */ | |
6de1e2a9 ZW |
791 | for (;;) |
792 | { | |
793 | token = cpp_get_token (pfile); | |
794 | switch (token) | |
795 | { | |
796 | case CPP_EOF: | |
564ad5f4 | 797 | return token; |
6de1e2a9 ZW |
798 | case CPP_POP: |
799 | /* If we've hit end of file, it's an error (reported by caller). | |
800 | Ditto if it's the end of cpp_expand_to_buffer text. | |
801 | If we've hit end of macro, just continue. */ | |
802 | if (!CPP_IS_MACRO_BUFFER (CPP_BUFFER (pfile))) | |
564ad5f4 | 803 | return token; |
6de1e2a9 ZW |
804 | break; |
805 | case CPP_LPAREN: | |
806 | paren++; | |
807 | break; | |
808 | case CPP_RPAREN: | |
809 | if (--paren < 0) | |
810 | goto found; | |
811 | break; | |
812 | case CPP_COMMA: | |
813 | /* if we've returned to lowest level and | |
814 | we aren't absorbing all args */ | |
815 | if (paren == 0 && rest_args == 0) | |
816 | goto found; | |
817 | break; | |
818 | found: | |
819 | /* Remove ',' or ')' from argument buffer. */ | |
820 | CPP_ADJUST_WRITTEN (pfile, -1); | |
564ad5f4 | 821 | return token; |
6de1e2a9 ZW |
822 | default:; |
823 | } | |
824 | } | |
6de1e2a9 ZW |
825 | } |
826 | \f | |
6de1e2a9 ZW |
827 | |
828 | static struct tm * | |
829 | timestamp (pfile) | |
830 | cpp_reader *pfile; | |
831 | { | |
832 | if (!pfile->timebuf) | |
833 | { | |
834 | time_t t = time ((time_t *) 0); | |
835 | pfile->timebuf = localtime (&t); | |
836 | } | |
837 | return pfile->timebuf; | |
838 | } | |
839 | ||
bcc5cac9 | 840 | static const char * const monthnames[] = |
6de1e2a9 ZW |
841 | { |
842 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", | |
843 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", | |
844 | }; | |
845 | ||
45b966db ZW |
846 | /* Place into PFILE a quoted string representing the string SRC. |
847 | Caller must reserve enough space in pfile->token_buffer. */ | |
848 | ||
849 | void | |
850 | _cpp_quote_string (pfile, src) | |
851 | cpp_reader *pfile; | |
852 | const char *src; | |
853 | { | |
854 | U_CHAR c; | |
855 | ||
856 | CPP_PUTC_Q (pfile, '\"'); | |
857 | for (;;) | |
858 | switch ((c = *src++)) | |
859 | { | |
860 | default: | |
861 | if (ISPRINT (c)) | |
862 | CPP_PUTC_Q (pfile, c); | |
863 | else | |
864 | { | |
865 | sprintf ((char *)CPP_PWRITTEN (pfile), "\\%03o", c); | |
866 | CPP_ADJUST_WRITTEN (pfile, 4); | |
867 | } | |
868 | break; | |
869 | ||
870 | case '\"': | |
871 | case '\\': | |
872 | CPP_PUTC_Q (pfile, '\\'); | |
873 | CPP_PUTC_Q (pfile, c); | |
874 | break; | |
875 | ||
876 | case '\0': | |
877 | CPP_PUTC_Q (pfile, '\"'); | |
878 | CPP_NUL_TERMINATE_Q (pfile); | |
879 | return; | |
880 | } | |
881 | } | |
882 | ||
6de1e2a9 ZW |
883 | /* |
884 | * expand things like __FILE__. Place the expansion into the output | |
885 | * buffer *without* rescanning. | |
886 | */ | |
887 | ||
888 | static void | |
889 | special_symbol (hp, pfile) | |
890 | HASHNODE *hp; | |
891 | cpp_reader *pfile; | |
892 | { | |
893 | const char *buf; | |
894 | int len; | |
895 | cpp_buffer *ip; | |
896 | ||
897 | switch (hp->type) | |
898 | { | |
899 | case T_FILE: | |
900 | case T_BASE_FILE: | |
901 | { | |
38b24ee2 | 902 | ip = cpp_file_buffer (pfile); |
6de1e2a9 ZW |
903 | if (hp->type == T_BASE_FILE) |
904 | { | |
38b24ee2 | 905 | while (CPP_PREV_BUFFER (ip) != NULL) |
6de1e2a9 ZW |
906 | ip = CPP_PREV_BUFFER (ip); |
907 | } | |
908 | ||
909 | buf = ip->nominal_fname; | |
910 | ||
911 | if (!buf) | |
912 | buf = ""; | |
913 | CPP_RESERVE (pfile, 3 + 4 * strlen (buf)); | |
45b966db | 914 | _cpp_quote_string (pfile, buf); |
6de1e2a9 ZW |
915 | return; |
916 | } | |
917 | ||
918 | case T_INCLUDE_LEVEL: | |
919 | { | |
38b24ee2 ZW |
920 | int true_indepth = 1; |
921 | ip = cpp_file_buffer (pfile); | |
922 | while ((ip = CPP_PREV_BUFFER (ip)) != NULL) | |
923 | true_indepth++; | |
6de1e2a9 ZW |
924 | |
925 | CPP_RESERVE (pfile, 10); | |
926 | sprintf (CPP_PWRITTEN (pfile), "%d", true_indepth); | |
927 | CPP_ADJUST_WRITTEN (pfile, strlen (CPP_PWRITTEN (pfile))); | |
928 | return; | |
929 | } | |
930 | ||
931 | case T_VERSION: | |
6feb7728 | 932 | len = strlen (hp->value.cpval); |
6de1e2a9 ZW |
933 | CPP_RESERVE (pfile, 3 + len); |
934 | CPP_PUTC_Q (pfile, '"'); | |
6feb7728 | 935 | CPP_PUTS_Q (pfile, hp->value.cpval, len); |
6de1e2a9 ZW |
936 | CPP_PUTC_Q (pfile, '"'); |
937 | CPP_NUL_TERMINATE_Q (pfile); | |
938 | return; | |
939 | ||
940 | case T_CONST: | |
941 | buf = hp->value.cpval; | |
942 | if (!buf) | |
943 | return; | |
944 | if (*buf == '\0') | |
ed45de98 | 945 | buf = "\r "; |
6de1e2a9 ZW |
946 | |
947 | len = strlen (buf); | |
948 | CPP_RESERVE (pfile, len + 1); | |
949 | CPP_PUTS_Q (pfile, buf, len); | |
950 | CPP_NUL_TERMINATE_Q (pfile); | |
951 | return; | |
952 | ||
953 | case T_STDC: | |
954 | CPP_RESERVE (pfile, 2); | |
955 | #ifdef STDC_0_IN_SYSTEM_HEADERS | |
38b24ee2 | 956 | ip = cpp_file_buffer (pfile); |
6de1e2a9 | 957 | if (ip->system_header_p |
707beebb | 958 | && !cpp_defined (pfile, (const U_CHAR *) "__STRICT_ANSI__", 15)) |
6de1e2a9 ZW |
959 | CPP_PUTC_Q (pfile, '0'); |
960 | else | |
961 | #endif | |
962 | CPP_PUTC_Q (pfile, '1'); | |
963 | CPP_NUL_TERMINATE_Q (pfile); | |
964 | return; | |
965 | ||
966 | case T_SPECLINE: | |
967 | { | |
968 | long line; | |
5e4df1ae | 969 | cpp_buf_line_and_col (cpp_file_buffer (pfile), &line, NULL); |
6de1e2a9 ZW |
970 | |
971 | CPP_RESERVE (pfile, 10); | |
972 | sprintf (CPP_PWRITTEN (pfile), "%ld", line); | |
973 | CPP_ADJUST_WRITTEN (pfile, strlen (CPP_PWRITTEN (pfile))); | |
974 | return; | |
975 | } | |
976 | ||
977 | case T_DATE: | |
978 | case T_TIME: | |
979 | { | |
980 | struct tm *timebuf; | |
981 | ||
982 | CPP_RESERVE (pfile, 20); | |
983 | timebuf = timestamp (pfile); | |
984 | if (hp->type == T_DATE) | |
985 | sprintf (CPP_PWRITTEN (pfile), "\"%s %2d %4d\"", | |
986 | monthnames[timebuf->tm_mon], | |
987 | timebuf->tm_mday, timebuf->tm_year + 1900); | |
988 | else | |
989 | sprintf (CPP_PWRITTEN (pfile), "\"%02d:%02d:%02d\"", | |
990 | timebuf->tm_hour, timebuf->tm_min, timebuf->tm_sec); | |
991 | ||
992 | CPP_ADJUST_WRITTEN (pfile, strlen (CPP_PWRITTEN (pfile))); | |
993 | return; | |
994 | } | |
995 | ||
fc009f96 GK |
996 | case T_POISON: |
997 | cpp_error (pfile, "attempt to use poisoned `%s'.", hp->name); | |
998 | CPP_RESERVE (pfile, 1); | |
999 | CPP_PUTC_Q (pfile, '0'); | |
1000 | CPP_NUL_TERMINATE_Q (pfile); | |
1001 | break; | |
1002 | ||
6de1e2a9 | 1003 | default: |
c1212d2f | 1004 | cpp_ice (pfile, "invalid special hash type"); |
6de1e2a9 ZW |
1005 | return; |
1006 | } | |
6de1e2a9 ZW |
1007 | } |
1008 | ||
1009 | /* Expand a macro call. | |
1010 | HP points to the symbol that is the macro being called. | |
1011 | Put the result of expansion onto the input stack | |
1012 | so that subsequent input by our caller will use it. | |
1013 | ||
1014 | If macro wants arguments, caller has already verified that | |
1015 | an argument list follows; arguments come from the input stack. */ | |
1016 | ||
1017 | void | |
b0699dad | 1018 | _cpp_macroexpand (pfile, hp) |
6de1e2a9 ZW |
1019 | cpp_reader *pfile; |
1020 | HASHNODE *hp; | |
1021 | { | |
1022 | int nargs; | |
1023 | DEFINITION *defn; | |
1024 | register U_CHAR *xbuf; | |
1025 | long start_line, start_column; | |
1026 | int xbuf_len; | |
a544cfd2 | 1027 | struct argdata *args = 0; |
6de1e2a9 | 1028 | long old_written = CPP_WRITTEN (pfile); |
a544cfd2 | 1029 | int rest_args, rest_zero = 0; |
6de1e2a9 ZW |
1030 | register int i; |
1031 | ||
6de1e2a9 ZW |
1032 | cpp_buf_line_and_col (cpp_file_buffer (pfile), &start_line, &start_column); |
1033 | ||
1034 | /* Check for and handle special symbols. */ | |
1035 | if (hp->type != T_MACRO) | |
1036 | { | |
1037 | special_symbol (hp, pfile); | |
1038 | xbuf_len = CPP_WRITTEN (pfile) - old_written; | |
1039 | xbuf = (U_CHAR *) xmalloc (xbuf_len + 1); | |
1040 | CPP_SET_WRITTEN (pfile, old_written); | |
ba412f14 | 1041 | memcpy (xbuf, CPP_PWRITTEN (pfile), xbuf_len + 1); |
6de1e2a9 ZW |
1042 | push_macro_expansion (pfile, xbuf, xbuf_len, hp); |
1043 | CPP_BUFFER (pfile)->has_escapes = 1; | |
1044 | return; | |
1045 | } | |
1046 | ||
1047 | defn = hp->value.defn; | |
1048 | nargs = defn->nargs; | |
1049 | pfile->output_escapes++; | |
1050 | ||
1051 | if (nargs >= 0) | |
1052 | { | |
564ad5f4 | 1053 | enum cpp_token token; |
6de1e2a9 ZW |
1054 | |
1055 | args = (struct argdata *) alloca ((nargs + 1) * sizeof (struct argdata)); | |
1056 | ||
1057 | for (i = 0; i < nargs; i++) | |
1058 | { | |
1059 | args[i].raw = args[i].expanded = 0; | |
1060 | args[i].raw_length = 0; | |
1061 | args[i].expand_length = args[i].stringified_length = -1; | |
6de1e2a9 ZW |
1062 | } |
1063 | ||
1064 | /* Parse all the macro args that are supplied. I counts them. | |
1065 | The first NARGS args are stored in ARGS. | |
1066 | The rest are discarded. If rest_args is set then we assume | |
1067 | macarg absorbed the rest of the args. */ | |
1068 | i = 0; | |
1069 | rest_args = 0; | |
564ad5f4 ZW |
1070 | |
1071 | /* Skip over the opening parenthesis. */ | |
ae79697b ZW |
1072 | CPP_OPTION (pfile, discard_comments)++; |
1073 | CPP_OPTION (pfile, no_line_commands)++; | |
564ad5f4 ZW |
1074 | pfile->no_macro_expand++; |
1075 | pfile->no_directives++; | |
1076 | ||
1077 | token = cpp_get_non_space_token (pfile); | |
1078 | if (token != CPP_LPAREN) | |
1079 | cpp_ice (pfile, "macroexpand: unexpected token %d (wanted LPAREN)", | |
1080 | token); | |
1081 | CPP_ADJUST_WRITTEN (pfile, -1); | |
1082 | ||
1083 | token = CPP_EOF; | |
6de1e2a9 ZW |
1084 | do |
1085 | { | |
1086 | if (rest_args) | |
1087 | continue; | |
1088 | if (i < nargs || (nargs == 0 && i == 0)) | |
1089 | { | |
1090 | /* if we are working on last arg which absorbs rest of args... */ | |
1091 | if (i == nargs - 1 && defn->rest_args) | |
1092 | rest_args = 1; | |
1093 | args[i].raw = CPP_WRITTEN (pfile); | |
1094 | token = macarg (pfile, rest_args); | |
1095 | args[i].raw_length = CPP_WRITTEN (pfile) - args[i].raw; | |
6de1e2a9 ZW |
1096 | } |
1097 | else | |
1098 | token = macarg (pfile, 0); | |
1099 | if (token == CPP_EOF || token == CPP_POP) | |
564ad5f4 ZW |
1100 | cpp_error_with_line (pfile, start_line, start_column, |
1101 | "unterminated macro call"); | |
6de1e2a9 ZW |
1102 | i++; |
1103 | } | |
1104 | while (token == CPP_COMMA); | |
ae79697b ZW |
1105 | CPP_OPTION (pfile, discard_comments)--; |
1106 | CPP_OPTION (pfile, no_line_commands)--; | |
564ad5f4 ZW |
1107 | pfile->no_macro_expand--; |
1108 | pfile->no_directives--; | |
1109 | if (token != CPP_RPAREN) | |
1110 | return; | |
6de1e2a9 ZW |
1111 | |
1112 | /* If we got one arg but it was just whitespace, call that 0 args. */ | |
1113 | if (i == 1) | |
1114 | { | |
1115 | register U_CHAR *bp = ARG_BASE + args[0].raw; | |
1116 | register U_CHAR *lim = bp + args[0].raw_length; | |
1117 | /* cpp.texi says for foo ( ) we provide one argument. | |
1118 | However, if foo wants just 0 arguments, treat this as 0. */ | |
1119 | if (nargs == 0) | |
a9ae4483 | 1120 | while (bp != lim && is_space(*bp)) |
6de1e2a9 ZW |
1121 | bp++; |
1122 | if (bp == lim) | |
1123 | i = 0; | |
1124 | } | |
1125 | ||
1126 | /* Don't output an error message if we have already output one for | |
1127 | a parse error above. */ | |
1128 | rest_zero = 0; | |
1129 | if (nargs == 0 && i > 0) | |
1130 | { | |
1131 | cpp_error (pfile, "arguments given to macro `%s'", hp->name); | |
1132 | } | |
1133 | else if (i < nargs) | |
1134 | { | |
1135 | /* traditional C allows foo() if foo wants one argument. */ | |
1136 | if (nargs == 1 && i == 0 && CPP_TRADITIONAL (pfile)) | |
1137 | ; | |
1138 | /* the rest args token is allowed to absorb 0 tokens */ | |
1139 | else if (i == nargs - 1 && defn->rest_args) | |
1140 | rest_zero = 1; | |
1141 | else if (i == 0) | |
1142 | cpp_error (pfile, "macro `%s' used without args", hp->name); | |
1143 | else if (i == 1) | |
1144 | cpp_error (pfile, "macro `%s' used with just one arg", hp->name); | |
1145 | else | |
1146 | cpp_error (pfile, "macro `%s' used with only %d args", | |
1147 | hp->name, i); | |
1148 | } | |
1149 | else if (i > nargs) | |
1150 | { | |
1151 | cpp_error (pfile, | |
1152 | "macro `%s' used with too many (%d) args", hp->name, i); | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | /* If macro wants zero args, we parsed the arglist for checking only. | |
1157 | Read directly from the macro definition. */ | |
1158 | if (nargs <= 0) | |
1159 | { | |
1160 | xbuf = defn->expansion; | |
1161 | xbuf_len = defn->length; | |
1162 | } | |
1163 | else | |
1164 | { | |
1165 | register U_CHAR *exp = defn->expansion; | |
1166 | register int offset; /* offset in expansion, | |
1167 | copied a piece at a time */ | |
1168 | register int totlen; /* total amount of exp buffer filled so far */ | |
1169 | ||
1170 | register struct reflist *ap, *last_ap; | |
1171 | ||
1172 | /* Macro really takes args. Compute the expansion of this call. */ | |
1173 | ||
1174 | /* Compute length in characters of the macro's expansion. | |
1175 | Also count number of times each arg is used. */ | |
1176 | xbuf_len = defn->length; | |
1177 | for (ap = defn->pattern; ap != NULL; ap = ap->next) | |
1178 | { | |
1179 | if (ap->stringify) | |
1180 | { | |
1181 | register struct argdata *arg = &args[ap->argno]; | |
1182 | /* Stringify if it hasn't already been */ | |
1183 | if (arg->stringified_length < 0) | |
1184 | { | |
1185 | int arglen = arg->raw_length; | |
1186 | int escaped = 0; | |
1187 | int in_string = 0; | |
1188 | int c; | |
1189 | /* Initially need_space is -1. Otherwise, 1 means the | |
1190 | previous character was a space, but we suppressed it; | |
1191 | 0 means the previous character was a non-space. */ | |
1192 | int need_space = -1; | |
1193 | i = 0; | |
1194 | arg->stringified = CPP_WRITTEN (pfile); | |
1195 | if (!CPP_TRADITIONAL (pfile)) | |
1196 | CPP_PUTC (pfile, '\"'); /* insert beginning quote */ | |
1197 | for (; i < arglen; i++) | |
1198 | { | |
1199 | c = (ARG_BASE + arg->raw)[i]; | |
1200 | ||
1201 | if (!in_string) | |
1202 | { | |
eaefae0e ZW |
1203 | /* Delete "\r " and "\r-" escapes. */ |
1204 | if (c == '\r') | |
1205 | { | |
1206 | i++; | |
1207 | continue; | |
1208 | } | |
6de1e2a9 ZW |
1209 | /* Internal sequences of whitespace are |
1210 | replaced by one space except within | |
1211 | a string or char token. */ | |
eaefae0e | 1212 | else if (is_space(c)) |
6de1e2a9 | 1213 | { |
6de1e2a9 ZW |
1214 | if (need_space == 0) |
1215 | need_space = 1; | |
1216 | continue; | |
1217 | } | |
1218 | else if (need_space > 0) | |
1219 | CPP_PUTC (pfile, ' '); | |
1220 | need_space = 0; | |
1221 | } | |
1222 | ||
1223 | if (escaped) | |
1224 | escaped = 0; | |
1225 | else | |
1226 | { | |
1227 | if (c == '\\') | |
1228 | escaped = 1; | |
1229 | if (in_string) | |
1230 | { | |
1231 | if (c == in_string) | |
1232 | in_string = 0; | |
1233 | } | |
1234 | else if (c == '\"' || c == '\'') | |
1235 | in_string = c; | |
1236 | } | |
1237 | ||
1238 | /* Escape these chars */ | |
1239 | if (c == '\"' || (in_string && c == '\\')) | |
1240 | CPP_PUTC (pfile, '\\'); | |
1241 | if (ISPRINT (c)) | |
1242 | CPP_PUTC (pfile, c); | |
1243 | else | |
1244 | { | |
1245 | CPP_RESERVE (pfile, 4); | |
1246 | sprintf ((char *) CPP_PWRITTEN (pfile), "\\%03o", | |
1247 | (unsigned int) c); | |
1248 | CPP_ADJUST_WRITTEN (pfile, 4); | |
1249 | } | |
1250 | } | |
1251 | if (!CPP_TRADITIONAL (pfile)) | |
1252 | CPP_PUTC (pfile, '\"'); /* insert ending quote */ | |
1253 | arg->stringified_length | |
1254 | = CPP_WRITTEN (pfile) - arg->stringified; | |
1255 | } | |
1256 | xbuf_len += args[ap->argno].stringified_length; | |
1257 | } | |
1258 | else if (ap->raw_before || ap->raw_after || CPP_TRADITIONAL (pfile)) | |
4571dc27 | 1259 | /* Add 4 for two \r-space markers to prevent |
6de1e2a9 ZW |
1260 | token concatenation. */ |
1261 | xbuf_len += args[ap->argno].raw_length + 4; | |
1262 | else | |
1263 | { | |
1264 | /* We have an ordinary (expanded) occurrence of the arg. | |
1265 | So compute its expansion, if we have not already. */ | |
1266 | if (args[ap->argno].expand_length < 0) | |
1267 | { | |
1268 | args[ap->argno].expanded = CPP_WRITTEN (pfile); | |
1269 | cpp_expand_to_buffer (pfile, | |
1270 | ARG_BASE + args[ap->argno].raw, | |
1271 | args[ap->argno].raw_length); | |
1272 | ||
1273 | args[ap->argno].expand_length | |
1274 | = CPP_WRITTEN (pfile) - args[ap->argno].expanded; | |
1275 | } | |
1276 | ||
4571dc27 | 1277 | /* Add 4 for two \r-space markers to prevent |
6de1e2a9 ZW |
1278 | token concatenation. */ |
1279 | xbuf_len += args[ap->argno].expand_length + 4; | |
1280 | } | |
6de1e2a9 ZW |
1281 | } |
1282 | ||
1283 | xbuf = (U_CHAR *) xmalloc (xbuf_len + 1); | |
1284 | ||
1285 | /* Generate in XBUF the complete expansion | |
1286 | with arguments substituted in. | |
1287 | TOTLEN is the total size generated so far. | |
1288 | OFFSET is the index in the definition | |
1289 | of where we are copying from. */ | |
1290 | offset = totlen = 0; | |
1291 | for (last_ap = NULL, ap = defn->pattern; ap != NULL; | |
1292 | last_ap = ap, ap = ap->next) | |
1293 | { | |
1294 | register struct argdata *arg = &args[ap->argno]; | |
1295 | int count_before = totlen; | |
1296 | ||
1297 | /* Add chars to XBUF. */ | |
ba412f14 ZW |
1298 | i = ap->nchars; |
1299 | memcpy (&xbuf[totlen], &exp[offset], i); | |
1300 | totlen += i; | |
1301 | offset += i; | |
6de1e2a9 ZW |
1302 | |
1303 | /* If followed by an empty rest arg with concatenation, | |
1304 | delete the last run of nonwhite chars. */ | |
1305 | if (rest_zero && totlen > count_before | |
1306 | && ((ap->rest_args && ap->raw_before) | |
1307 | || (last_ap != NULL && last_ap->rest_args | |
1308 | && last_ap->raw_after))) | |
1309 | { | |
1310 | /* Delete final whitespace. */ | |
a9ae4483 | 1311 | while (totlen > count_before && is_space(xbuf[totlen - 1])) |
6de1e2a9 ZW |
1312 | totlen--; |
1313 | ||
1314 | /* Delete the nonwhites before them. */ | |
a9ae4483 | 1315 | while (totlen > count_before && !is_space(xbuf[totlen - 1])) |
6de1e2a9 ZW |
1316 | totlen--; |
1317 | } | |
1318 | ||
1319 | if (ap->stringify != 0) | |
1320 | { | |
ba412f14 ZW |
1321 | memcpy (xbuf + totlen, ARG_BASE + arg->stringified, |
1322 | arg->stringified_length); | |
6de1e2a9 ZW |
1323 | totlen += arg->stringified_length; |
1324 | } | |
1325 | else if (ap->raw_before || ap->raw_after || CPP_TRADITIONAL (pfile)) | |
1326 | { | |
1327 | U_CHAR *p1 = ARG_BASE + arg->raw; | |
1328 | U_CHAR *l1 = p1 + arg->raw_length; | |
1329 | if (ap->raw_before) | |
1330 | { | |
5d83f44b ZW |
1331 | /* Arg is concatenated before: delete leading whitespace, |
1332 | whitespace markers, and no-reexpansion markers. */ | |
1333 | while (p1 != l1) | |
1334 | { | |
a9ae4483 | 1335 | if (is_space(p1[0])) |
5d83f44b ZW |
1336 | p1++; |
1337 | else if (p1[0] == '\r') | |
1338 | p1 += 2; | |
1339 | else | |
1340 | break; | |
1341 | } | |
6de1e2a9 ZW |
1342 | } |
1343 | if (ap->raw_after) | |
1344 | { | |
1345 | /* Arg is concatenated after: delete trailing whitespace, | |
1346 | whitespace markers, and no-reexpansion markers. */ | |
1347 | while (p1 != l1) | |
1348 | { | |
a9ae4483 | 1349 | if (is_space(l1[-1])) |
6de1e2a9 | 1350 | l1--; |
ed45de98 ZW |
1351 | else if (l1[-1] == '\r') |
1352 | l1--; | |
6de1e2a9 ZW |
1353 | else if (l1[-1] == '-') |
1354 | { | |
ed45de98 | 1355 | if (l1 != p1 + 1 && l1[-2] == '\r') |
6de1e2a9 ZW |
1356 | l1 -= 2; |
1357 | else | |
1358 | break; | |
1359 | } | |
1360 | else | |
1361 | break; | |
1362 | } | |
1363 | } | |
1364 | ||
1365 | /* Delete any no-reexpansion marker that precedes | |
1366 | an identifier at the beginning of the argument. */ | |
ed45de98 | 1367 | if (p1[0] == '\r' && p1[1] == '-') |
6de1e2a9 ZW |
1368 | p1 += 2; |
1369 | ||
ba412f14 | 1370 | memcpy (xbuf + totlen, p1, l1 - p1); |
6de1e2a9 ZW |
1371 | totlen += l1 - p1; |
1372 | } | |
1373 | else | |
1374 | { | |
1375 | U_CHAR *expanded = ARG_BASE + arg->expanded; | |
1376 | if (!ap->raw_before && totlen > 0 && arg->expand_length | |
1377 | && !CPP_TRADITIONAL (pfile) | |
455d2586 | 1378 | && unsafe_chars (pfile, xbuf[totlen - 1], expanded[0])) |
6de1e2a9 | 1379 | { |
ed45de98 | 1380 | xbuf[totlen++] = '\r'; |
6de1e2a9 ZW |
1381 | xbuf[totlen++] = ' '; |
1382 | } | |
1383 | ||
ba412f14 | 1384 | memcpy (xbuf + totlen, expanded, arg->expand_length); |
6de1e2a9 ZW |
1385 | totlen += arg->expand_length; |
1386 | ||
1387 | if (!ap->raw_after && totlen > 0 && offset < defn->length | |
1388 | && !CPP_TRADITIONAL (pfile) | |
455d2586 | 1389 | && unsafe_chars (pfile, xbuf[totlen - 1], exp[offset])) |
6de1e2a9 | 1390 | { |
ed45de98 | 1391 | xbuf[totlen++] = '\r'; |
6de1e2a9 ZW |
1392 | xbuf[totlen++] = ' '; |
1393 | } | |
6de1e2a9 ZW |
1394 | } |
1395 | ||
1396 | if (totlen > xbuf_len) | |
34ca9541 | 1397 | { |
c1212d2f | 1398 | cpp_ice (pfile, "buffer overrun in macroexpand"); |
34ca9541 ZW |
1399 | return; |
1400 | } | |
6de1e2a9 ZW |
1401 | } |
1402 | ||
1403 | /* if there is anything left of the definition | |
1404 | after handling the arg list, copy that in too. */ | |
1405 | ||
1406 | for (i = offset; i < defn->length; i++) | |
1407 | { | |
1408 | /* if we've reached the end of the macro */ | |
1409 | if (exp[i] == ')') | |
1410 | rest_zero = 0; | |
1411 | if (!(rest_zero && last_ap != NULL && last_ap->rest_args | |
1412 | && last_ap->raw_after)) | |
1413 | xbuf[totlen++] = exp[i]; | |
1414 | } | |
1415 | ||
1416 | xbuf[totlen] = 0; | |
1417 | xbuf_len = totlen; | |
1418 | ||
1419 | } | |
1420 | ||
1421 | pfile->output_escapes--; | |
1422 | ||
1423 | /* Now put the expansion on the input stack | |
1424 | so our caller will commence reading from it. */ | |
1425 | push_macro_expansion (pfile, xbuf, xbuf_len, hp); | |
1426 | CPP_BUFFER (pfile)->has_escapes = 1; | |
1427 | ||
1428 | /* Pop the space we've used in the token_buffer for argument expansion. */ | |
1429 | CPP_SET_WRITTEN (pfile, old_written); | |
1430 | ||
1431 | /* Recursive macro use sometimes works traditionally. | |
1432 | #define foo(x,y) bar (x (y,0), y) | |
1433 | foo (foo, baz) */ | |
1434 | ||
1435 | if (!CPP_TRADITIONAL (pfile)) | |
1436 | hp->type = T_DISABLED; | |
1437 | } | |
1438 | ||
1439 | /* Return 1 iff a token ending in C1 followed directly by a token C2 | |
1440 | could cause mis-tokenization. */ | |
1441 | ||
1442 | static int | |
455d2586 ZW |
1443 | unsafe_chars (pfile, c1, c2) |
1444 | cpp_reader *pfile; | |
6de1e2a9 ZW |
1445 | int c1, c2; |
1446 | { | |
1447 | switch (c1) | |
1448 | { | |
5d83f44b | 1449 | case '+': case '-': |
6de1e2a9 ZW |
1450 | if (c2 == c1 || c2 == '=') |
1451 | return 1; | |
1452 | goto letter; | |
1453 | ||
5d83f44b | 1454 | case 'e': case 'E': case 'p': case 'P': |
6de1e2a9 ZW |
1455 | if (c2 == '-' || c2 == '+') |
1456 | return 1; /* could extend a pre-processing number */ | |
1457 | goto letter; | |
1458 | ||
455d2586 | 1459 | case '$': |
ae79697b | 1460 | if (CPP_OPTION (pfile, dollars_in_ident)) |
455d2586 ZW |
1461 | goto letter; |
1462 | return 0; | |
1463 | ||
6de1e2a9 ZW |
1464 | case 'L': |
1465 | if (c2 == '\'' || c2 == '\"') | |
1466 | return 1; /* Could turn into L"xxx" or L'xxx'. */ | |
1467 | goto letter; | |
1468 | ||
5d83f44b ZW |
1469 | case '.': case '0': case '1': case '2': case '3': |
1470 | case '4': case '5': case '6': case '7': case '8': case '9': | |
6de1e2a9 ZW |
1471 | case '_': case 'a': case 'b': case 'c': case 'd': case 'f': |
1472 | case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': | |
1473 | case 'm': case 'n': case 'o': case 'q': case 'r': case 's': | |
1474 | case 't': case 'u': case 'v': case 'w': case 'x': case 'y': | |
1475 | case 'z': case 'A': case 'B': case 'C': case 'D': case 'F': | |
1476 | case 'G': case 'H': case 'I': case 'J': case 'K': case 'M': | |
1477 | case 'N': case 'O': case 'Q': case 'R': case 'S': case 'T': | |
1478 | case 'U': case 'V': case 'W': case 'X': case 'Y': case 'Z': | |
1479 | letter: | |
1480 | /* We're in the middle of either a name or a pre-processing number. */ | |
a9ae4483 | 1481 | return (is_idchar(c2) || c2 == '.'); |
6de1e2a9 ZW |
1482 | |
1483 | case '<': case '>': case '!': case '%': case '#': case ':': | |
1484 | case '^': case '&': case '|': case '*': case '/': case '=': | |
1485 | return (c2 == c1 || c2 == '='); | |
1486 | } | |
1487 | return 0; | |
1488 | } | |
1489 | ||
1490 | static void | |
1491 | push_macro_expansion (pfile, xbuf, xbuf_len, hp) | |
1492 | cpp_reader *pfile; | |
1493 | register U_CHAR *xbuf; | |
1494 | int xbuf_len; | |
1495 | HASHNODE *hp; | |
1496 | { | |
1497 | register cpp_buffer *mbuf = cpp_push_buffer (pfile, xbuf, xbuf_len); | |
1498 | if (mbuf == NULL) | |
1499 | return; | |
1500 | mbuf->cleanup = macro_cleanup; | |
1501 | mbuf->data = hp; | |
1502 | ||
ed45de98 | 1503 | /* The first chars of the expansion should be a "\r " added by |
6de1e2a9 ZW |
1504 | collect_expansion. This is to prevent accidental token-pasting |
1505 | between the text preceding the macro invocation, and the macro | |
1506 | expansion text. | |
1507 | ||
1508 | We would like to avoid adding unneeded spaces (for the sake of | |
1509 | tools that use cpp, such as imake). In some common cases we can | |
1510 | tell that it is safe to omit the space. | |
1511 | ||
1512 | The character before the macro invocation cannot have been an | |
1513 | idchar (or else it would have been pasted with the idchars of | |
1514 | the macro name). Therefore, if the first non-space character | |
1515 | of the expansion is an idchar, we do not need the extra space | |
1516 | to prevent token pasting. | |
1517 | ||
1518 | Also, we don't need the extra space if the first char is '(', | |
1519 | or some other (less common) characters. */ | |
1520 | ||
ed45de98 | 1521 | if (xbuf[0] == '\r' && xbuf[1] == ' ' |
a9ae4483 | 1522 | && (is_idchar(xbuf[2]) || xbuf[2] == '(' || xbuf[2] == '\'' |
6de1e2a9 ZW |
1523 | || xbuf[2] == '\"')) |
1524 | mbuf->cur += 2; | |
1525 | ||
1526 | /* Likewise, avoid the extra space at the end of the macro expansion | |
1527 | if this is safe. We can do a better job here since we can know | |
1528 | what the next char will be. */ | |
1529 | if (xbuf_len >= 3 | |
ed45de98 | 1530 | && mbuf->rlimit[-2] == '\r' |
6de1e2a9 ZW |
1531 | && mbuf->rlimit[-1] == ' ') |
1532 | { | |
1533 | int c1 = mbuf->rlimit[-3]; | |
1534 | int c2 = CPP_BUF_PEEK (CPP_PREV_BUFFER (CPP_BUFFER (pfile))); | |
455d2586 | 1535 | if (c2 == EOF || !unsafe_chars (pfile, c1, c2)) |
6de1e2a9 ZW |
1536 | mbuf->rlimit -= 2; |
1537 | } | |
1538 | } | |
1539 | ||
1540 | /* Return zero if two DEFINITIONs are isomorphic. */ | |
1541 | ||
1542 | int | |
b0699dad | 1543 | _cpp_compare_defs (pfile, d1, d2) |
6de1e2a9 ZW |
1544 | cpp_reader *pfile; |
1545 | DEFINITION *d1, *d2; | |
1546 | { | |
38b24ee2 ZW |
1547 | struct reflist *a1, *a2; |
1548 | U_CHAR *p1 = d1->expansion; | |
1549 | U_CHAR *p2 = d2->expansion; | |
6de1e2a9 ZW |
1550 | int first = 1; |
1551 | ||
1552 | if (d1->nargs != d2->nargs) | |
1553 | return 1; | |
1554 | if (CPP_PEDANTIC (pfile) | |
38b24ee2 ZW |
1555 | && d1->argnames && d2->argnames) |
1556 | { | |
1557 | U_CHAR *arg1 = d1->argnames; | |
1558 | U_CHAR *arg2 = d2->argnames; | |
1559 | size_t len; | |
1560 | int i = d1->nargs; | |
1561 | while (i--) | |
1562 | { | |
8051b178 | 1563 | len = strlen (arg1) + 1; |
38b24ee2 ZW |
1564 | if (strcmp (arg1, arg2)) |
1565 | return 1; | |
1566 | arg1 += len; | |
1567 | arg2 += len; | |
1568 | } | |
1569 | } | |
6de1e2a9 ZW |
1570 | for (a1 = d1->pattern, a2 = d2->pattern; a1 && a2; |
1571 | a1 = a1->next, a2 = a2->next) | |
1572 | { | |
1573 | if (!((a1->nchars == a2->nchars && !strncmp (p1, p2, a1->nchars)) | |
1574 | || !comp_def_part (first, p1, a1->nchars, p2, a2->nchars, 0)) | |
1575 | || a1->argno != a2->argno | |
1576 | || a1->stringify != a2->stringify | |
1577 | || a1->raw_before != a2->raw_before | |
1578 | || a1->raw_after != a2->raw_after) | |
1579 | return 1; | |
1580 | first = 0; | |
1581 | p1 += a1->nchars; | |
1582 | p2 += a2->nchars; | |
1583 | } | |
1584 | if (a1 != a2) | |
1585 | return 1; | |
1586 | ||
1587 | return comp_def_part (first, p1, d1->length - (p1 - d1->expansion), | |
1588 | p2, d2->length - (p2 - d2->expansion), 1); | |
1589 | } | |
1590 | ||
1591 | /* Return 1 if two parts of two macro definitions are effectively different. | |
1592 | One of the parts starts at BEG1 and has LEN1 chars; | |
1593 | the other has LEN2 chars at BEG2. | |
1594 | Any sequence of whitespace matches any other sequence of whitespace. | |
1595 | FIRST means these parts are the first of a macro definition; | |
1596 | so ignore leading whitespace entirely. | |
1597 | LAST means these parts are the last of a macro definition; | |
1598 | so ignore trailing whitespace entirely. */ | |
1599 | ||
1600 | static int | |
1601 | comp_def_part (first, beg1, len1, beg2, len2, last) | |
1602 | int first; | |
1603 | U_CHAR *beg1, *beg2; | |
1604 | int len1, len2; | |
1605 | int last; | |
1606 | { | |
1607 | register U_CHAR *end1 = beg1 + len1; | |
1608 | register U_CHAR *end2 = beg2 + len2; | |
1609 | if (first) | |
1610 | { | |
a9ae4483 | 1611 | while (beg1 != end1 && is_space(*beg1)) |
6de1e2a9 | 1612 | beg1++; |
a9ae4483 | 1613 | while (beg2 != end2 && is_space(*beg2)) |
6de1e2a9 ZW |
1614 | beg2++; |
1615 | } | |
1616 | if (last) | |
1617 | { | |
a9ae4483 | 1618 | while (beg1 != end1 && is_space(end1[-1])) |
6de1e2a9 | 1619 | end1--; |
a9ae4483 | 1620 | while (beg2 != end2 && is_space(end2[-1])) |
6de1e2a9 ZW |
1621 | end2--; |
1622 | } | |
1623 | while (beg1 != end1 && beg2 != end2) | |
1624 | { | |
a9ae4483 | 1625 | if (is_space(*beg1) && is_space(*beg2)) |
6de1e2a9 | 1626 | { |
a9ae4483 | 1627 | while (beg1 != end1 && is_space(*beg1)) |
6de1e2a9 | 1628 | beg1++; |
a9ae4483 | 1629 | while (beg2 != end2 && is_space(*beg2)) |
6de1e2a9 ZW |
1630 | beg2++; |
1631 | } | |
1632 | else if (*beg1 == *beg2) | |
1633 | { | |
1634 | beg1++; | |
1635 | beg2++; | |
1636 | } | |
1637 | else | |
1638 | break; | |
1639 | } | |
1640 | return (beg1 != end1) || (beg2 != end2); | |
1641 | } | |
3caee4a8 ZW |
1642 | |
1643 | /* Dump the definition of macro MACRO on stdout. The format is suitable | |
1644 | to be read back in again. */ | |
1645 | ||
1646 | void | |
b0699dad | 1647 | _cpp_dump_definition (pfile, sym, len, defn) |
3caee4a8 | 1648 | cpp_reader *pfile; |
a2a76ce7 ZW |
1649 | const U_CHAR *sym; |
1650 | long len; | |
1651 | DEFINITION *defn; | |
3caee4a8 | 1652 | { |
c45da1ca | 1653 | if (pfile->lineno == 0) |
45b966db | 1654 | _cpp_output_line_command (pfile, same_file); |
c45da1ca | 1655 | |
a2a76ce7 | 1656 | CPP_RESERVE (pfile, len + sizeof "#define "); |
3caee4a8 | 1657 | CPP_PUTS_Q (pfile, "#define ", sizeof "#define " -1); |
a2a76ce7 | 1658 | CPP_PUTS_Q (pfile, sym, len); |
3caee4a8 ZW |
1659 | |
1660 | if (defn->nargs == -1) | |
1661 | { | |
1662 | CPP_PUTC_Q (pfile, ' '); | |
1663 | ||
1664 | /* The first and last two characters of a macro expansion are | |
1665 | always "\r "; this needs to be trimmed out. | |
1666 | So we need length-4 chars of space, plus one for the NUL. */ | |
1667 | CPP_RESERVE (pfile, defn->length - 4 + 1); | |
1668 | CPP_PUTS_Q (pfile, defn->expansion + 2, defn->length - 4); | |
3caee4a8 ZW |
1669 | } |
1670 | else | |
1671 | { | |
1672 | struct reflist *r; | |
e7553be5 DB |
1673 | unsigned char **argv = (unsigned char **) alloca (defn->nargs * |
1674 | sizeof(char *)); | |
1675 | int *argl = (int *) alloca (defn->nargs * sizeof(int)); | |
3caee4a8 ZW |
1676 | unsigned char *x; |
1677 | int i; | |
1678 | ||
1679 | /* First extract the argument list. */ | |
38b24ee2 ZW |
1680 | x = defn->argnames; |
1681 | for (i = 0; i < defn->nargs; i++) | |
3caee4a8 ZW |
1682 | { |
1683 | argv[i] = x; | |
38b24ee2 ZW |
1684 | argl[i] = strlen (x); |
1685 | x += argl[i] + 1; | |
3caee4a8 ZW |
1686 | } |
1687 | ||
1688 | /* Now print out the argument list. */ | |
1689 | CPP_PUTC_Q (pfile, '('); | |
1690 | for (i = 0; i < defn->nargs; i++) | |
1691 | { | |
1692 | CPP_RESERVE (pfile, argl[i] + 2); | |
38b24ee2 ZW |
1693 | if (!(i == defn->nargs-1 && defn->rest_args |
1694 | && !strcmp (argv[i], "__VA_ARGS__"))) | |
1695 | CPP_PUTS_Q (pfile, argv[i], argl[i]); | |
3caee4a8 ZW |
1696 | if (i < defn->nargs-1) |
1697 | CPP_PUTS_Q (pfile, ", ", 2); | |
1698 | } | |
3caee4a8 | 1699 | if (defn->rest_args) |
38b24ee2 ZW |
1700 | CPP_PUTS (pfile, "...", 3); |
1701 | CPP_PUTS (pfile, ") ", 2); | |
3caee4a8 ZW |
1702 | |
1703 | /* Now the definition. */ | |
1704 | x = defn->expansion; | |
1705 | for (r = defn->pattern; r; r = r->next) | |
1706 | { | |
1707 | i = r->nchars; | |
1708 | if (*x == '\r') x += 2, i -= 2; | |
1709 | /* i chars for macro text, plus the length of the macro | |
1710 | argument name, plus one for a stringify marker, plus two for | |
1711 | each concatenation marker. */ | |
1712 | CPP_RESERVE (pfile, | |
1713 | i + argl[r->argno] + r->stringify | |
1714 | + (r->raw_before + r->raw_after) * 2); | |
1715 | ||
1716 | if (i > 0) CPP_PUTS_Q (pfile, x, i); | |
1717 | if (r->raw_before) | |
1718 | CPP_PUTS_Q (pfile, "##", 2); | |
1719 | if (r->stringify) | |
1720 | CPP_PUTC_Q (pfile, '#'); | |
1721 | CPP_PUTS_Q (pfile, argv[r->argno], argl[r->argno]); | |
1722 | if (r->raw_after && !(r->next && r->next->nchars == 0 | |
1723 | && r->next->raw_before)) | |
1724 | CPP_PUTS_Q (pfile, "##", 2); | |
1725 | ||
1726 | x += i; | |
1727 | } | |
1728 | ||
1729 | i = defn->length - (x - defn->expansion) - 2; | |
1730 | if (*x == '\r') x += 2, i -= 2; | |
1731 | if (i > 0) CPP_PUTS (pfile, x, i); | |
3caee4a8 | 1732 | } |
c45da1ca ZW |
1733 | if (pfile->lineno == 0) |
1734 | CPP_PUTC (pfile, '\n'); | |
1735 | CPP_NUL_TERMINATE (pfile); | |
3caee4a8 | 1736 | } |
d35364d1 ZW |
1737 | |
1738 | /* Dump out the hash table. */ | |
1739 | static int | |
1740 | dump_hash_helper (h, p) | |
1a7b4c69 | 1741 | void **h; |
d35364d1 ZW |
1742 | void *p; |
1743 | { | |
1a7b4c69 | 1744 | HASHNODE *hp = (HASHNODE *)*h; |
d35364d1 ZW |
1745 | cpp_reader *pfile = (cpp_reader *)p; |
1746 | ||
194ae3f6 ZW |
1747 | if (hp->type == T_MACRO) |
1748 | { | |
1749 | _cpp_dump_definition (pfile, hp->name, hp->length, hp->value.defn); | |
1750 | CPP_PUTC (pfile, '\n'); | |
1751 | } | |
d35364d1 ZW |
1752 | return 1; |
1753 | } | |
1754 | ||
1755 | void | |
1756 | _cpp_dump_macro_hash (pfile) | |
1757 | cpp_reader *pfile; | |
1758 | { | |
1759 | htab_traverse (pfile->hashtab, dump_hash_helper, pfile); | |
1760 | } |