]>
Commit | Line | Data |
---|---|---|
93c80368 | 1 | /* Part of CPP library. (Macro and #define handling.) |
711b8824 | 2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1998, |
4b49c365 | 3 | 1999, 2000, 2001 Free Software Foundation, Inc. |
711b8824 ZW |
4 | Written by Per Bothner, 1994. |
5 | Based on CCCP program by Paul Rubin, June 1986 | |
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 | |
20 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
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 | ||
26 | #include "config.h" | |
27 | #include "system.h" | |
93c80368 | 28 | #include "intl.h" /* for _("<command line>") below. */ |
711b8824 ZW |
29 | #include "cpplib.h" |
30 | #include "cpphash.h" | |
31 | ||
510fbf86 NB |
32 | #ifndef STDC_0_IN_SYSTEM_HEADERS |
33 | #define STDC_0_IN_SYSTEM_HEADERS 0 /* Boolean macro. */ | |
34 | #endif | |
35 | ||
93c80368 | 36 | struct cpp_macro |
711b8824 | 37 | { |
93c80368 NB |
38 | cpp_hashnode **params; /* Parameters, if any. */ |
39 | cpp_token *expansion; /* First token of replacement list. */ | |
40 | const char *file; /* Defined in file name. */ | |
41 | unsigned int line; /* Starting line number. */ | |
42 | unsigned int count; /* Number of tokens in expansion. */ | |
43 | unsigned short paramc; /* Number of parameters. */ | |
44 | unsigned int fun_like : 1; /* If a function-like macro. */ | |
28e0f040 | 45 | unsigned int variadic : 1; /* If a variadic macro. */ |
93c80368 NB |
46 | unsigned int disabled : 1; /* If macro is disabled. */ |
47 | }; | |
48 | ||
49 | typedef struct macro_arg macro_arg; | |
50 | struct macro_arg | |
51 | { | |
52 | cpp_token *first; /* First token in unexpanded argument. */ | |
53 | cpp_token *expanded; /* Macro-expanded argument. */ | |
54 | cpp_token *stringified; /* Stringified argument. */ | |
55 | unsigned int count; /* # of tokens in argument. */ | |
56 | unsigned int expanded_count; /* # of tokens in expanded argument. */ | |
711b8824 ZW |
57 | }; |
58 | ||
93c80368 NB |
59 | /* Macro expansion. */ |
60 | ||
61 | static void lock_pools PARAMS ((cpp_reader *)); | |
62 | static void unlock_pools PARAMS ((cpp_reader *)); | |
29b10746 | 63 | static int enter_macro_context PARAMS ((cpp_reader *, cpp_hashnode *)); |
93c80368 NB |
64 | static void builtin_macro PARAMS ((cpp_reader *, cpp_token *)); |
65 | static cpp_context *push_arg_context PARAMS ((cpp_reader *, macro_arg *)); | |
66 | static enum cpp_ttype parse_arg PARAMS ((cpp_reader *, macro_arg *, int)); | |
67 | static macro_arg *parse_args PARAMS ((cpp_reader *, const cpp_hashnode *)); | |
68 | static cpp_context *next_context PARAMS ((cpp_reader *)); | |
69 | static void expand_arg PARAMS ((cpp_reader *, macro_arg *)); | |
70 | static unsigned char *quote_string PARAMS ((unsigned char *, | |
71 | const unsigned char *, | |
72 | unsigned int)); | |
73 | static void make_string_token PARAMS ((cpp_pool *, cpp_token *, | |
74 | const U_CHAR *, unsigned int)); | |
75 | static void make_number_token PARAMS ((cpp_reader *, cpp_token *, int)); | |
76 | static void stringify_arg PARAMS ((cpp_reader *, macro_arg *)); | |
77 | static void paste_all_tokens PARAMS ((cpp_reader *, cpp_token *)); | |
d63eefbf | 78 | static int paste_tokens PARAMS ((cpp_reader *, cpp_token *, cpp_token *)); |
93c80368 NB |
79 | static int funlike_invocation_p PARAMS ((cpp_reader *, const cpp_hashnode *, |
80 | struct toklist *)); | |
81 | static void replace_args PARAMS ((cpp_reader *, cpp_macro *, macro_arg *, | |
82 | struct toklist *)); | |
83 | ||
84 | /* Lookaheads. */ | |
85 | ||
86 | static void save_lookahead_token PARAMS ((cpp_reader *, const cpp_token *)); | |
87 | static void take_lookahead_token PARAMS ((cpp_reader *, cpp_token *)); | |
93c80368 NB |
88 | static cpp_lookahead *alloc_lookahead PARAMS ((cpp_reader *)); |
89 | static void free_lookahead PARAMS ((cpp_lookahead *)); | |
90 | ||
91 | /* #define directive parsing and handling. */ | |
92 | ||
93 | static cpp_token *lex_expansion_token PARAMS ((cpp_reader *, cpp_macro *)); | |
94 | static int check_macro_redefinition PARAMS ((cpp_reader *, | |
95 | const cpp_hashnode *, | |
96 | const cpp_macro *)); | |
97 | static int save_parameter PARAMS ((cpp_reader *, cpp_macro *, cpp_hashnode *)); | |
98 | static int parse_params PARAMS ((cpp_reader *, cpp_macro *)); | |
e1aa5140 | 99 | static void check_trad_stringification PARAMS ((cpp_reader *, |
93c80368 | 100 | const cpp_macro *, |
e1aa5140 | 101 | const cpp_string *)); |
711b8824 | 102 | |
93c80368 NB |
103 | /* Allocates a buffer to hold a token's TEXT, and converts TOKEN to a |
104 | CPP_STRING token containing TEXT in quoted form. */ | |
105 | static void | |
106 | make_string_token (pool, token, text, len) | |
107 | cpp_pool *pool; | |
108 | cpp_token *token; | |
109 | const U_CHAR *text; | |
110 | unsigned int len; | |
111 | { | |
112 | U_CHAR *buf = _cpp_pool_alloc (pool, len * 4); | |
113 | ||
114 | token->type = CPP_STRING; | |
115 | token->val.str.text = buf; | |
116 | token->val.str.len = quote_string (buf, text, len) - buf; | |
117 | token->flags = 0; | |
118 | } | |
119 | ||
120 | /* Allocates and converts a temporary token to a CPP_NUMBER token, | |
121 | evaluating to NUMBER. */ | |
122 | static void | |
123 | make_number_token (pfile, token, number) | |
124 | cpp_reader *pfile; | |
125 | cpp_token *token; | |
126 | int number; | |
127 | { | |
49fe13f6 | 128 | unsigned char *buf = _cpp_pool_alloc (&pfile->ident_pool, 20); |
93c80368 NB |
129 | |
130 | sprintf ((char *) buf, "%d", number); | |
131 | token->type = CPP_NUMBER; | |
132 | token->val.str.text = buf; | |
133 | token->val.str.len = ustrlen (buf); | |
134 | token->flags = 0; | |
135 | } | |
136 | ||
137 | static const char * const monthnames[] = | |
138 | { | |
139 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", | |
140 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" | |
141 | }; | |
142 | ||
143 | /* Handle builtin macros like __FILE__. */ | |
144 | static void | |
145 | builtin_macro (pfile, token) | |
146 | cpp_reader *pfile; | |
147 | cpp_token *token; | |
148 | { | |
93c80368 | 149 | cpp_hashnode *node = token->val.node; |
93c80368 NB |
150 | |
151 | switch (node->value.builtin) | |
152 | { | |
153 | case BT_FILE: | |
154 | case BT_BASE_FILE: | |
711b8824 | 155 | { |
0bda4760 NB |
156 | const char *name; |
157 | cpp_buffer *buffer = pfile->buffer; | |
158 | ||
159 | if (node->value.builtin == BT_BASE_FILE) | |
160 | while (buffer->prev) | |
161 | buffer = buffer->prev; | |
162 | ||
163 | name = buffer->nominal_fname; | |
49fe13f6 | 164 | make_string_token (&pfile->ident_pool, token, |
0bda4760 | 165 | (const unsigned char *) name, strlen (name)); |
711b8824 | 166 | } |
93c80368 NB |
167 | break; |
168 | ||
169 | case BT_INCLUDE_LEVEL: | |
170 | /* pfile->include_depth counts the primary source as level 1, | |
171 | but historically __INCLUDE_DEPTH__ has called the primary | |
172 | source level 0. */ | |
173 | make_number_token (pfile, token, pfile->include_depth - 1); | |
174 | break; | |
175 | ||
176 | case BT_SPECLINE: | |
177 | /* If __LINE__ is embedded in a macro, it must expand to the | |
178 | line of the macro's invocation, not its definition. | |
179 | Otherwise things like assert() will not work properly. */ | |
180 | make_number_token (pfile, token, cpp_get_line (pfile)->line); | |
181 | break; | |
182 | ||
183 | case BT_STDC: | |
184 | { | |
185 | int stdc = 1; | |
186 | ||
510fbf86 | 187 | if (STDC_0_IN_SYSTEM_HEADERS && CPP_IN_SYSTEM_HEADER (pfile) |
8a47978d | 188 | && pfile->spec_nodes.n__STRICT_ANSI__->type == NT_VOID) |
93c80368 | 189 | stdc = 0; |
93c80368 NB |
190 | make_number_token (pfile, token, stdc); |
191 | } | |
192 | break; | |
711b8824 | 193 | |
93c80368 NB |
194 | case BT_DATE: |
195 | case BT_TIME: | |
196 | if (pfile->date.type == CPP_EOF) | |
197 | { | |
198 | /* Allocate __DATE__ and __TIME__ from permanent storage, | |
199 | and save them in pfile so we don't have to do this again. | |
200 | We don't generate these strings at init time because | |
201 | time() and localtime() are very slow on some systems. */ | |
202 | time_t tt = time (NULL); | |
203 | struct tm *tb = localtime (&tt); | |
204 | ||
205 | make_string_token (&pfile->ident_pool, &pfile->date, | |
206 | DSC("Oct 11 1347")); | |
207 | make_string_token (&pfile->ident_pool, &pfile->time, | |
208 | DSC("12:34:56")); | |
209 | ||
210 | sprintf ((char *) pfile->date.val.str.text, "%s %2d %4d", | |
211 | monthnames[tb->tm_mon], tb->tm_mday, tb->tm_year + 1900); | |
212 | sprintf ((char *) pfile->time.val.str.text, "%02d:%02d:%02d", | |
213 | tb->tm_hour, tb->tm_min, tb->tm_sec); | |
214 | } | |
215 | *token = node->value.builtin == BT_DATE ? pfile->date: pfile->time; | |
216 | break; | |
217 | ||
218 | default: | |
219 | cpp_ice (pfile, "invalid builtin macro \"%s\"", node->name); | |
220 | break; | |
221 | } | |
711b8824 ZW |
222 | } |
223 | ||
93c80368 NB |
224 | /* Used by cpperror.c to obtain the correct line and column to report |
225 | in a diagnostic. */ | |
226 | const cpp_lexer_pos * | |
227 | cpp_get_line (pfile) | |
711b8824 | 228 | cpp_reader *pfile; |
711b8824 | 229 | { |
93c80368 NB |
230 | return &pfile->lexer_pos; |
231 | } | |
711b8824 | 232 | |
93c80368 NB |
233 | static void |
234 | lock_pools (pfile) | |
235 | cpp_reader *pfile; | |
236 | { | |
93c80368 | 237 | _cpp_lock_pool (&pfile->argument_pool); |
711b8824 ZW |
238 | } |
239 | ||
93c80368 NB |
240 | static void |
241 | unlock_pools (pfile) | |
242 | cpp_reader *pfile; | |
243 | { | |
93c80368 NB |
244 | _cpp_unlock_pool (&pfile->argument_pool); |
245 | } | |
711b8824 | 246 | |
93c80368 NB |
247 | /* Adds backslashes before all backslashes and double quotes appearing |
248 | in strings. Non-printable characters are converted to octal. */ | |
249 | static U_CHAR * | |
250 | quote_string (dest, src, len) | |
251 | U_CHAR *dest; | |
252 | const U_CHAR *src; | |
253 | unsigned int len; | |
254 | { | |
255 | while (len--) | |
256 | { | |
257 | U_CHAR c = *src++; | |
711b8824 | 258 | |
93c80368 NB |
259 | if (c == '\\' || c == '"') |
260 | { | |
261 | *dest++ = '\\'; | |
262 | *dest++ = c; | |
263 | } | |
264 | else | |
265 | { | |
266 | if (ISPRINT (c)) | |
267 | *dest++ = c; | |
268 | else | |
711b8824 | 269 | { |
93c80368 NB |
270 | sprintf ((char *) dest, "\\%03o", c); |
271 | dest += 4; | |
711b8824 | 272 | } |
93c80368 NB |
273 | } |
274 | } | |
711b8824 | 275 | |
93c80368 NB |
276 | return dest; |
277 | } | |
711b8824 | 278 | |
93c80368 NB |
279 | /* Convert a token sequence to a single string token according to the |
280 | rules of the ISO C #-operator. */ | |
281 | static void | |
282 | stringify_arg (pfile, arg) | |
283 | cpp_reader *pfile; | |
284 | macro_arg *arg; | |
285 | { | |
49fe13f6 | 286 | cpp_pool *pool = &pfile->ident_pool; |
93c80368 NB |
287 | unsigned char *start = POOL_FRONT (pool); |
288 | unsigned int i, escape_it, total_len = 0, backslash_count = 0; | |
711b8824 | 289 | |
93c80368 NB |
290 | /* Loop, reading in the argument's tokens. */ |
291 | for (i = 0; i < arg->count; i++) | |
292 | { | |
293 | unsigned char *dest; | |
294 | const cpp_token *token = &arg->first[i]; | |
295 | unsigned int len = cpp_token_len (token); | |
711b8824 | 296 | |
93c80368 NB |
297 | escape_it = (token->type == CPP_STRING || token->type == CPP_WSTRING |
298 | || token->type == CPP_CHAR || token->type == CPP_WCHAR | |
299 | || token->type == CPP_OSTRING); | |
711b8824 | 300 | |
93c80368 NB |
301 | if (escape_it) |
302 | /* Worst case is each char is octal. */ | |
303 | len *= 4; | |
304 | len++; /* Room for initial space. */ | |
711b8824 | 305 | |
93c80368 NB |
306 | dest = &start[total_len]; |
307 | if (dest + len > POOL_LIMIT (pool)) | |
308 | { | |
309 | _cpp_next_chunk (pool, len, (unsigned char **) &start); | |
310 | dest = &start[total_len]; | |
311 | } | |
711b8824 | 312 | |
93c80368 | 313 | /* No leading white space. */ |
4c2b647d NB |
314 | if (token->flags & PREV_WHITE && total_len > 0) |
315 | *dest++ = ' '; | |
711b8824 | 316 | |
93c80368 NB |
317 | if (escape_it) |
318 | { | |
319 | unsigned char *buf = (unsigned char *) xmalloc (len); | |
320 | ||
321 | len = cpp_spell_token (pfile, token, buf) - buf; | |
322 | dest = quote_string (dest, buf, len); | |
323 | free (buf); | |
324 | } | |
325 | else | |
326 | dest = cpp_spell_token (pfile, token, dest); | |
327 | total_len = dest - start; | |
328 | ||
6c53ebff | 329 | if (token->type == CPP_OTHER && token->val.c == '\\') |
93c80368 NB |
330 | backslash_count++; |
331 | else | |
332 | backslash_count = 0; | |
333 | } | |
334 | ||
335 | /* Ignore the final \ of invalid string literals. */ | |
336 | if (backslash_count & 1) | |
337 | { | |
338 | cpp_warning (pfile, "invalid string literal, ignoring final '\\'"); | |
339 | total_len--; | |
340 | } | |
341 | ||
342 | POOL_COMMIT (pool, total_len); | |
343 | ||
344 | arg->stringified = xnew (cpp_token); | |
345 | arg->stringified->flags = 0; | |
346 | arg->stringified->type = CPP_STRING; | |
347 | arg->stringified->val.str.text = start; | |
348 | arg->stringified->val.str.len = total_len; | |
349 | } | |
350 | ||
d63eefbf NB |
351 | /* Try to paste two tokens. On success, the LHS becomes the pasted |
352 | token, and 0 is returned. For failure, we update the flags of the | |
353 | RHS appropriately and return non-zero. */ | |
354 | static int | |
355 | paste_tokens (pfile, lhs, rhs) | |
356 | cpp_reader *pfile; | |
357 | cpp_token *lhs, *rhs; | |
358 | { | |
359 | unsigned char flags; | |
360 | int digraph = 0; | |
361 | enum cpp_ttype type; | |
362 | ||
363 | type = cpp_can_paste (pfile, lhs, rhs, &digraph); | |
364 | ||
365 | if (type == CPP_EOF) | |
366 | { | |
6a6b1628 NB |
367 | /* Mandatory warning for all apart from assembler. */ |
368 | if (CPP_OPTION (pfile, lang) != CLK_ASM) | |
d63eefbf NB |
369 | cpp_warning (pfile, |
370 | "pasting \"%s\" and \"%s\" does not give a valid preprocessing token", | |
371 | cpp_token_as_text (pfile, lhs), | |
372 | cpp_token_as_text (pfile, rhs)); | |
373 | ||
374 | /* The standard states that behaviour is undefined. By the | |
6a6b1628 NB |
375 | principle of least surpise, we step back before the RHS, and |
376 | mark it to prevent macro expansion. Tests in the testsuite | |
377 | rely on clearing PREV_WHITE here, though you could argue we | |
378 | should actually set it. Assembler can have '.' in labels and | |
379 | so requires that we don't insert spaces there. Maybe we should | |
380 | change this to put out a space unless it's assembler. */ | |
d63eefbf NB |
381 | rhs->flags &= ~PREV_WHITE; |
382 | rhs->flags |= NO_EXPAND; | |
383 | return 1; | |
384 | } | |
385 | ||
386 | flags = lhs->flags & ~DIGRAPH; | |
387 | if (digraph) | |
388 | flags |= DIGRAPH; | |
389 | ||
390 | /* Identifiers and numbers need spellings to be pasted. */ | |
391 | if (type == CPP_NAME || type == CPP_NUMBER) | |
392 | { | |
393 | unsigned int total_len = cpp_token_len (lhs) + cpp_token_len (rhs); | |
394 | unsigned char *result, *end; | |
d63eefbf | 395 | |
49fe13f6 | 396 | result = _cpp_pool_alloc (&pfile->ident_pool, total_len + 1); |
d63eefbf NB |
397 | |
398 | /* Paste the spellings and null terminate. */ | |
399 | end = cpp_spell_token (pfile, rhs, cpp_spell_token (pfile, lhs, result)); | |
400 | *end = '\0'; | |
401 | total_len = end - result; | |
402 | ||
403 | if (type == CPP_NAME) | |
404 | { | |
405 | lhs->val.node = cpp_lookup (pfile, result, total_len); | |
406 | if (lhs->val.node->flags & NODE_OPERATOR) | |
407 | { | |
408 | flags |= NAMED_OP; | |
409 | lhs->type = lhs->val.node->value.operator; | |
410 | } | |
411 | } | |
412 | else | |
413 | { | |
414 | lhs->val.str.text = result; | |
415 | lhs->val.str.len = total_len; | |
416 | } | |
417 | } | |
418 | else if (type == CPP_WCHAR || type == CPP_WSTRING) | |
419 | lhs->val.str = rhs->val.str; | |
420 | ||
421 | /* Set type and flags after pasting spellings. */ | |
422 | lhs->type = type; | |
423 | lhs->flags = flags; | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
93c80368 NB |
428 | /* Handles an arbitrarily long sequence of ## operators. This |
429 | implementation is left-associative, non-recursive, and finishes a | |
d63eefbf NB |
430 | paste before handling succeeding ones. If the paste fails, we back |
431 | up a token to just after the ## operator, with the effect that it | |
432 | appears in the output stream normally. */ | |
93c80368 NB |
433 | static void |
434 | paste_all_tokens (pfile, lhs) | |
435 | cpp_reader *pfile; | |
436 | cpp_token *lhs; | |
437 | { | |
93c80368 | 438 | cpp_token *rhs; |
d63eefbf | 439 | unsigned char orig_flags = lhs->flags; |
93c80368 NB |
440 | |
441 | do | |
442 | { | |
443 | /* Take the token directly from the current context. We can do | |
444 | this, because we are in the replacement list of either an | |
445 | object-like macro, or a function-like macro with arguments | |
446 | inserted. In either case, the constraints to #define | |
d63eefbf | 447 | guarantee we have at least one more token. */ |
93c80368 | 448 | rhs = pfile->context->list.first++; |
d63eefbf | 449 | if (paste_tokens (pfile, lhs, rhs)) |
93c80368 | 450 | { |
d63eefbf | 451 | /* We failed. Step back so we read the RHS in next. */ |
4c2b647d NB |
452 | pfile->context->list.first--; |
453 | break; | |
93c80368 | 454 | } |
93c80368 NB |
455 | } |
456 | while (rhs->flags & PASTE_LEFT); | |
457 | ||
458 | /* The pasted token has the PREV_WHITE flag of the LHS, is no longer | |
459 | PASTE_LEFT, and is subject to macro expansion. */ | |
460 | lhs->flags &= ~(PREV_WHITE | PASTE_LEFT | NO_EXPAND); | |
461 | lhs->flags |= orig_flags & PREV_WHITE; | |
462 | } | |
463 | ||
4c2b647d | 464 | /* Reads the unexpanded tokens of a macro argument into ARG. VAR_ARGS |
28e0f040 NB |
465 | is non-zero if this is a variadic macro. Returns the type of the |
466 | token that caused reading to finish. */ | |
93c80368 | 467 | static enum cpp_ttype |
28e0f040 | 468 | parse_arg (pfile, arg, variadic) |
93c80368 NB |
469 | cpp_reader *pfile; |
470 | struct macro_arg *arg; | |
28e0f040 | 471 | int variadic; |
93c80368 NB |
472 | { |
473 | enum cpp_ttype result; | |
474 | unsigned int paren = 0; | |
8d9e9a08 | 475 | unsigned int line; |
93c80368 NB |
476 | |
477 | arg->first = (cpp_token *) POOL_FRONT (&pfile->argument_pool); | |
478 | for (;; arg->count++) | |
479 | { | |
480 | cpp_token *token = &arg->first[arg->count]; | |
481 | if ((unsigned char *) (token + 1) >= POOL_LIMIT (&pfile->argument_pool)) | |
482 | { | |
483 | _cpp_next_chunk (&pfile->argument_pool, sizeof (cpp_token), | |
484 | (unsigned char **) &arg->first); | |
485 | token = &arg->first[arg->count]; | |
486 | } | |
487 | ||
8d9e9a08 NB |
488 | /* Newlines in arguments are white space (6.10.3.10). */ |
489 | line = pfile->lexer_pos.output_line; | |
7f2f1a66 | 490 | cpp_get_token (pfile, token); |
8d9e9a08 NB |
491 | if (line != pfile->lexer_pos.output_line) |
492 | token->flags |= PREV_WHITE; | |
93c80368 | 493 | |
8d9e9a08 | 494 | result = token->type; |
93c80368 NB |
495 | if (result == CPP_OPEN_PAREN) |
496 | paren++; | |
497 | else if (result == CPP_CLOSE_PAREN && paren-- == 0) | |
498 | break; | |
28e0f040 NB |
499 | /* Commas are not terminators within parantheses or variadic. */ |
500 | else if (result == CPP_COMMA && paren == 0 && !variadic) | |
93c80368 NB |
501 | break; |
502 | else if (result == CPP_EOF) | |
503 | break; /* Error reported by caller. */ | |
93c80368 | 504 | } |
711b8824 | 505 | |
93c80368 NB |
506 | /* Commit the memory used to store the arguments. */ |
507 | POOL_COMMIT (&pfile->argument_pool, arg->count * sizeof (cpp_token)); | |
508 | ||
509 | return result; | |
711b8824 ZW |
510 | } |
511 | ||
93c80368 NB |
512 | /* Parse the arguments making up a macro invocation. */ |
513 | static macro_arg * | |
514 | parse_args (pfile, node) | |
515 | cpp_reader *pfile; | |
516 | const cpp_hashnode *node; | |
517 | { | |
518 | cpp_macro *macro = node->value.macro; | |
519 | macro_arg *args, *cur; | |
520 | enum cpp_ttype type; | |
521 | int argc, error = 0; | |
522 | ||
523 | /* Allocate room for at least one argument, and zero it out. */ | |
524 | argc = macro->paramc ? macro->paramc: 1; | |
525 | args = xcnewvec (macro_arg, argc); | |
526 | ||
527 | for (cur = args, argc = 0; ;) | |
528 | { | |
529 | argc++; | |
530 | ||
28e0f040 | 531 | type = parse_arg (pfile, cur, argc == macro->paramc && macro->variadic); |
93c80368 NB |
532 | if (type == CPP_CLOSE_PAREN || type == CPP_EOF) |
533 | break; | |
534 | ||
535 | /* Re-use the last argument for excess arguments. */ | |
536 | if (argc < macro->paramc) | |
537 | cur++; | |
538 | } | |
539 | ||
540 | if (type == CPP_EOF) | |
541 | { | |
542 | cpp_error (pfile, "unterminated argument list invoking macro \"%s\"", | |
543 | node->name); | |
544 | error = 1; | |
545 | } | |
546 | else if (argc < macro->paramc) | |
547 | { | |
548 | /* As an extension, a rest argument is allowed to not appear in | |
549 | the invocation at all. | |
550 | e.g. #define debug(format, args...) something | |
551 | debug("string"); | |
552 | ||
553 | This is exactly the same as if there had been an empty rest | |
554 | argument - debug("string", ). */ | |
555 | ||
28e0f040 | 556 | if (argc + 1 == macro->paramc && macro->variadic) |
93c80368 | 557 | { |
bdb05a7b | 558 | if (CPP_PEDANTIC (pfile)) |
93c80368 NB |
559 | cpp_pedwarn (pfile, "ISO C99 requires rest arguments to be used"); |
560 | } | |
561 | else | |
562 | { | |
563 | cpp_error (pfile, | |
564 | "macro \"%s\" requires %u arguments, but only %u given", | |
565 | node->name, macro->paramc, argc); | |
566 | error = 1; | |
567 | } | |
568 | } | |
569 | else if (argc > macro->paramc) | |
570 | { | |
4c2b647d NB |
571 | /* Empty argument to a macro taking no arguments is OK. */ |
572 | if (argc != 1 || cur->count) | |
93c80368 NB |
573 | { |
574 | cpp_error (pfile, | |
575 | "macro \"%s\" passed %u arguments, but takes just %u", | |
576 | node->name, argc, macro->paramc); | |
577 | error = 1; | |
578 | } | |
579 | } | |
580 | ||
581 | if (error) | |
582 | { | |
583 | free (args); | |
584 | args = 0; | |
585 | } | |
586 | ||
587 | return args; | |
588 | } | |
589 | ||
590 | static int | |
591 | funlike_invocation_p (pfile, node, list) | |
592 | cpp_reader *pfile; | |
593 | const cpp_hashnode *node; | |
594 | struct toklist *list; | |
595 | { | |
673b13e2 | 596 | cpp_context *orig; |
93c80368 NB |
597 | cpp_token maybe_paren; |
598 | macro_arg *args = 0; | |
8d9e9a08 | 599 | cpp_lexer_pos macro_pos; |
93c80368 | 600 | |
8d9e9a08 | 601 | macro_pos = pfile->lexer_pos; |
93c80368 NB |
602 | pfile->state.parsing_args = 1; |
603 | pfile->state.prevent_expansion++; | |
8aaef6e0 | 604 | orig = pfile->context; |
93c80368 NB |
605 | |
606 | cpp_start_lookahead (pfile); | |
607 | cpp_get_token (pfile, &maybe_paren); | |
608 | cpp_stop_lookahead (pfile, maybe_paren.type == CPP_OPEN_PAREN); | |
609 | ||
610 | if (maybe_paren.type == CPP_OPEN_PAREN) | |
611 | args = parse_args (pfile, node); | |
612 | else if (CPP_WTRADITIONAL (pfile)) | |
613 | cpp_warning (pfile, | |
614 | "function-like macro \"%s\" must be used with arguments in traditional C", | |
615 | node->name); | |
616 | ||
617 | /* Restore original context. */ | |
8aaef6e0 | 618 | pfile->context = orig; |
93c80368 NB |
619 | pfile->state.prevent_expansion--; |
620 | pfile->state.parsing_args = 0; | |
621 | ||
622 | if (args) | |
623 | { | |
8d9e9a08 NB |
624 | /* The macro's expansion appears where the name would have. */ |
625 | pfile->lexer_pos = macro_pos; | |
626 | ||
93c80368 | 627 | if (node->value.macro->paramc > 0) |
7f2f1a66 NB |
628 | { |
629 | /* Don't save tokens during pre-expansion. */ | |
630 | struct cpp_lookahead *la_saved = pfile->la_write; | |
631 | pfile->la_write = 0; | |
632 | replace_args (pfile, node->value.macro, args, list); | |
633 | pfile->la_write = la_saved; | |
634 | } | |
93c80368 NB |
635 | free (args); |
636 | } | |
637 | ||
638 | return args != 0; | |
639 | } | |
640 | ||
641 | /* Push the context of a macro onto the context stack. TOKEN is the | |
642 | macro name. If we can successfully start expanding the macro, | |
a5c3cccd NB |
643 | TOKEN is replaced with the first token of the expansion, and we |
644 | return non-zero. */ | |
711b8824 | 645 | static int |
29b10746 | 646 | enter_macro_context (pfile, node) |
711b8824 | 647 | cpp_reader *pfile; |
29b10746 | 648 | cpp_hashnode *node; |
711b8824 | 649 | { |
93c80368 | 650 | cpp_context *context; |
29b10746 | 651 | cpp_macro *macro = node->value.macro; |
93c80368 | 652 | struct toklist list; |
711b8824 | 653 | |
93c80368 NB |
654 | /* Save the position of the outermost macro invocation. */ |
655 | if (!pfile->context->prev) | |
8d9e9a08 | 656 | lock_pools (pfile); |
711b8824 | 657 | |
29b10746 | 658 | if (macro->fun_like && !funlike_invocation_p (pfile, node, &list)) |
93c80368 NB |
659 | { |
660 | if (!pfile->context->prev) | |
661 | unlock_pools (pfile); | |
a5c3cccd | 662 | return 0; |
93c80368 | 663 | } |
711b8824 | 664 | |
93c80368 | 665 | if (macro->paramc == 0) |
711b8824 | 666 | { |
4c2b647d NB |
667 | list.first = macro->expansion; |
668 | list.limit = macro->expansion + macro->count; | |
711b8824 | 669 | } |
4c2b647d | 670 | |
26ec42ee | 671 | /* Only push a macro context for non-empty replacement lists. */ |
29b10746 NB |
672 | if (list.first != list.limit) |
673 | { | |
29b10746 NB |
674 | context = next_context (pfile); |
675 | context->list = list; | |
676 | context->macro = macro; | |
26ec42ee | 677 | |
29b10746 NB |
678 | /* Disable the macro within its expansion. */ |
679 | macro->disabled = 1; | |
680 | } | |
93c80368 | 681 | |
a5c3cccd | 682 | return 1; |
93c80368 NB |
683 | } |
684 | ||
685 | /* Move to the next context. Create one if there is none. */ | |
686 | static cpp_context * | |
687 | next_context (pfile) | |
688 | cpp_reader *pfile; | |
689 | { | |
690 | cpp_context *prev = pfile->context; | |
691 | cpp_context *result = prev->next; | |
692 | ||
693 | if (result == 0) | |
711b8824 | 694 | { |
93c80368 NB |
695 | result = xnew (cpp_context); |
696 | prev->next = result; | |
697 | result->prev = prev; | |
698 | result->next = 0; | |
711b8824 ZW |
699 | } |
700 | ||
93c80368 NB |
701 | pfile->context = result; |
702 | return result; | |
703 | } | |
704 | ||
705 | static void | |
706 | replace_args (pfile, macro, args, list) | |
707 | cpp_reader *pfile; | |
708 | cpp_macro *macro; | |
709 | macro_arg *args; | |
710 | struct toklist *list; | |
711 | { | |
26ec42ee | 712 | unsigned char flags = 0; |
93c80368 NB |
713 | unsigned int i, total; |
714 | const cpp_token *src, *limit; | |
715 | cpp_token *dest; | |
716 | macro_arg *arg; | |
717 | ||
718 | src = macro->expansion; | |
719 | limit = src + macro->count; | |
720 | ||
721 | /* First, fully macro-expand arguments, calculating the number of | |
722 | tokens in the final expansion as we go. This ensures that the | |
723 | possible recursive use of argument_pool is fine. */ | |
724 | total = limit - src; | |
725 | for (; src < limit; src++) | |
726 | if (src->type == CPP_MACRO_ARG) | |
727 | { | |
728 | /* We have an argument. If it is not being stringified or | |
729 | pasted it is macro-replaced before insertion. */ | |
6c53ebff | 730 | arg = &args[src->val.arg_no - 1]; |
4c2b647d | 731 | |
93c80368 NB |
732 | if (src->flags & STRINGIFY_ARG) |
733 | { | |
734 | if (!arg->stringified) | |
735 | stringify_arg (pfile, arg); | |
736 | } | |
737 | else if ((src->flags & PASTE_LEFT) | |
738 | || (src > macro->expansion && (src[-1].flags & PASTE_LEFT))) | |
739 | total += arg->count - 1; | |
740 | else | |
741 | { | |
742 | if (!arg->expanded) | |
4c2b647d NB |
743 | { |
744 | arg->expanded_count = 0; | |
745 | if (arg->count) | |
746 | expand_arg (pfile, arg); | |
747 | } | |
93c80368 NB |
748 | total += arg->expanded_count - 1; |
749 | } | |
750 | } | |
751 | ||
752 | dest = (cpp_token *) _cpp_pool_alloc (&pfile->argument_pool, | |
753 | total * sizeof (cpp_token)); | |
754 | list->first = dest; | |
93c80368 NB |
755 | |
756 | for (src = macro->expansion; src < limit; src++) | |
757 | if (src->type == CPP_MACRO_ARG) | |
758 | { | |
759 | unsigned int count; | |
760 | const cpp_token *from; | |
761 | ||
6c53ebff | 762 | arg = &args[src->val.arg_no - 1]; |
93c80368 NB |
763 | if (src->flags & STRINGIFY_ARG) |
764 | from = arg->stringified, count = 1; | |
4c2b647d | 765 | else if (src->flags & PASTE_LEFT) |
93c80368 | 766 | count = arg->count, from = arg->first; |
4c2b647d NB |
767 | else if (src > macro->expansion && (src[-1].flags & PASTE_LEFT)) |
768 | { | |
769 | count = arg->count, from = arg->first; | |
770 | if (dest != list->first) | |
771 | { | |
772 | /* GCC has special semantics for , ## b where b is a | |
773 | varargs parameter: the comma disappears if b was | |
774 | given no actual arguments (not merely if b is an | |
775 | empty argument); otherwise pasting is turned off. */ | |
776 | if (dest[-1].type == CPP_COMMA | |
28e0f040 | 777 | && macro->variadic |
4c2b647d NB |
778 | && src->val.arg_no == macro->paramc) |
779 | { | |
780 | if (count == 0) | |
781 | dest--; | |
782 | else | |
783 | dest[-1].flags &= ~PASTE_LEFT; | |
784 | } | |
785 | /* Count == 0 is the RHS a placemarker case. */ | |
786 | else if (count == 0) | |
787 | dest[-1].flags &= ~PASTE_LEFT; | |
788 | } | |
789 | } | |
93c80368 NB |
790 | else |
791 | count = arg->expanded_count, from = arg->expanded; | |
93c80368 | 792 | |
4c2b647d NB |
793 | /* Count == 0 is the LHS a placemarker case. */ |
794 | if (count) | |
795 | { | |
796 | memcpy (dest, from, count * sizeof (cpp_token)); | |
797 | ||
798 | /* The first token gets PREV_WHITE of the CPP_MACRO_ARG. */ | |
799 | dest->flags &= ~PREV_WHITE; | |
800 | dest->flags |= src->flags & PREV_WHITE; | |
93c80368 | 801 | |
4c2b647d NB |
802 | /* The last token gets the PASTE_LEFT of the CPP_MACRO_ARG. */ |
803 | dest[count - 1].flags |= src->flags & PASTE_LEFT; | |
93c80368 | 804 | |
26ec42ee | 805 | dest[0].flags |= AVOID_LPASTE; |
4c2b647d NB |
806 | dest += count; |
807 | } | |
26ec42ee NB |
808 | |
809 | /* The token after the argument must avoid an accidental paste. */ | |
810 | flags = AVOID_LPASTE; | |
93c80368 NB |
811 | } |
812 | else | |
26ec42ee NB |
813 | { |
814 | *dest = *src; | |
815 | dest->flags |= flags; | |
816 | dest++; | |
817 | flags = 0; | |
818 | } | |
93c80368 | 819 | |
4c2b647d NB |
820 | list->limit = dest; |
821 | ||
93c80368 NB |
822 | /* Free the expanded arguments. */ |
823 | for (i = 0; i < macro->paramc; i++) | |
711b8824 | 824 | { |
93c80368 NB |
825 | if (args[i].expanded) |
826 | free (args[i].expanded); | |
827 | if (args[i].stringified) | |
828 | free (args[i].stringified); | |
829 | } | |
830 | } | |
831 | ||
832 | /* Subroutine of expand_arg to put the unexpanded tokens on the | |
833 | context stack. */ | |
834 | static cpp_context * | |
835 | push_arg_context (pfile, arg) | |
836 | cpp_reader *pfile; | |
837 | macro_arg *arg; | |
838 | { | |
839 | cpp_context *context = next_context (pfile); | |
840 | context->macro = 0; | |
841 | context->list.first = arg->first; | |
842 | context->list.limit = arg->first + arg->count; | |
843 | ||
844 | return context; | |
845 | } | |
846 | ||
847 | static void | |
848 | expand_arg (pfile, arg) | |
849 | cpp_reader *pfile; | |
850 | macro_arg *arg; | |
851 | { | |
852 | cpp_token *token; | |
853 | unsigned int capacity = 256; | |
854 | ||
855 | /* Loop, reading in the arguments. */ | |
856 | arg->expanded = (cpp_token *) xmalloc (capacity * sizeof (cpp_token)); | |
93c80368 NB |
857 | |
858 | push_arg_context (pfile, arg); | |
859 | do | |
860 | { | |
861 | if (arg->expanded_count >= capacity) | |
711b8824 | 862 | { |
93c80368 NB |
863 | capacity *= 2; |
864 | arg->expanded = (cpp_token *) | |
865 | xrealloc (arg->expanded, capacity * sizeof (cpp_token)); | |
866 | } | |
867 | token = &arg->expanded[arg->expanded_count++]; | |
7f2f1a66 | 868 | cpp_get_token (pfile, token); |
93c80368 NB |
869 | } |
870 | while (token->type != CPP_EOF); | |
871 | ||
872 | arg->expanded_count--; | |
873 | ||
874 | /* Pop the context we pushed. */ | |
875 | pfile->context = pfile->context->prev; | |
876 | } | |
877 | ||
878 | void | |
879 | _cpp_pop_context (pfile) | |
880 | cpp_reader *pfile; | |
881 | { | |
882 | cpp_context *context = pfile->context; | |
883 | ||
884 | pfile->context = context->prev; | |
8aaef6e0 NB |
885 | if (!pfile->context->prev && !pfile->state.parsing_args) |
886 | unlock_pools (pfile); | |
887 | ||
888 | /* Re-enable a macro, temporarily if parsing_args, when leaving its | |
889 | expansion. */ | |
890 | context->macro->disabled = 0; | |
93c80368 NB |
891 | } |
892 | ||
7f2f1a66 NB |
893 | /* Eternal routine to get a token. Also used nearly everywhere |
894 | internally, except for places where we know we can safely call | |
895 | the lexer directly, such as lexing a directive name. | |
896 | ||
897 | Macro expansions and directives are transparently handled, | |
898 | including entering included files. Thus tokens are post-macro | |
899 | expansion, and after any intervening directives. External callers | |
900 | see CPP_EOF only at EOF. Internal callers also see it when meeting | |
901 | a directive inside a macro call, when at the end of a directive and | |
902 | state.in_directive is still 1, and at the end of argument | |
903 | pre-expansion. */ | |
93c80368 | 904 | void |
7f2f1a66 | 905 | cpp_get_token (pfile, token) |
93c80368 NB |
906 | cpp_reader *pfile; |
907 | cpp_token *token; | |
908 | { | |
29b10746 NB |
909 | unsigned char flags = 0; |
910 | ||
911 | for (;;) | |
93c80368 NB |
912 | { |
913 | cpp_context *context = pfile->context; | |
914 | ||
915 | if (pfile->la_read) | |
916 | take_lookahead_token (pfile, token); | |
917 | /* Context->prev == 0 <=> base context. */ | |
918 | else if (!context->prev) | |
919 | _cpp_lex_token (pfile, token); | |
920 | else if (context->list.first != context->list.limit) | |
29b10746 NB |
921 | { |
922 | *token = *context->list.first++; | |
7f2f1a66 | 923 | /* PASTE_LEFT tokens can only appear in macro expansions. */ |
8d9e9a08 | 924 | if (token->flags & PASTE_LEFT) |
7f2f1a66 | 925 | paste_all_tokens (pfile, token); |
29b10746 | 926 | } |
93c80368 NB |
927 | else |
928 | { | |
929 | if (context->macro) | |
711b8824 | 930 | { |
26ec42ee NB |
931 | /* Avoid accidental paste at the end of a macro. */ |
932 | flags |= AVOID_LPASTE; | |
93c80368 | 933 | _cpp_pop_context (pfile); |
29b10746 | 934 | continue; |
711b8824 | 935 | } |
a949941c | 936 | /* End of argument pre-expansion. */ |
93c80368 NB |
937 | token->type = CPP_EOF; |
938 | token->flags = 0; | |
b528a07e | 939 | return; |
93c80368 | 940 | } |
93c80368 | 941 | |
26ec42ee NB |
942 | token->flags |= flags; |
943 | flags = 0; | |
a5c3cccd | 944 | if (token->type != CPP_NAME) |
93c80368 NB |
945 | break; |
946 | ||
a5c3cccd NB |
947 | /* Handle macros and the _Pragma operator. */ |
948 | if (token->val.node->type == NT_MACRO | |
949 | && !pfile->state.prevent_expansion | |
950 | && !(token->flags & NO_EXPAND)) | |
93c80368 | 951 | { |
29b10746 | 952 | cpp_hashnode *node = token->val.node; |
4c2b647d | 953 | |
a5c3cccd NB |
954 | /* Macros invalidate controlling macros. */ |
955 | pfile->mi_state = MI_FAILED; | |
956 | ||
26ec42ee NB |
957 | /* Remember PREV_WHITE and avoid an accidental paste. */ |
958 | flags = (token->flags & PREV_WHITE) | AVOID_LPASTE; | |
959 | ||
29b10746 | 960 | if (node->flags & NODE_BUILTIN) |
a5c3cccd NB |
961 | { |
962 | builtin_macro (pfile, token); | |
26ec42ee | 963 | token->flags = flags; |
a5c3cccd NB |
964 | break; |
965 | } | |
966 | ||
29b10746 NB |
967 | if (node->value.macro->disabled) |
968 | token->flags |= NO_EXPAND; | |
969 | else if (enter_macro_context (pfile, node)) | |
a5c3cccd | 970 | continue; |
93c80368 | 971 | } |
a5c3cccd | 972 | |
fe6c2db9 NB |
973 | /* Don't interpret _Pragma within directives. The standard is |
974 | not clear on this, but to me this makes most sense. */ | |
975 | if (token->val.node != pfile->spec_nodes.n__Pragma | |
976 | || pfile->state.in_directive) | |
93c80368 | 977 | break; |
a5c3cccd | 978 | |
7f2f1a66 NB |
979 | /* Handle it, and loop back for another token. MI is cleared |
980 | since this token came from either the lexer or a macro. */ | |
a5c3cccd | 981 | _cpp_do__Pragma (pfile); |
93c80368 | 982 | } |
93c80368 NB |
983 | |
984 | if (pfile->la_write) | |
985 | save_lookahead_token (pfile, token); | |
986 | } | |
987 | ||
988 | /* Read each token in, until EOF. Directives are transparently | |
989 | processed. */ | |
990 | void | |
8dc4676d | 991 | cpp_scan_buffer_nooutput (pfile, all_buffers) |
93c80368 | 992 | cpp_reader *pfile; |
8dc4676d | 993 | int all_buffers; |
93c80368 NB |
994 | { |
995 | cpp_token token; | |
8dc4676d | 996 | cpp_buffer *buffer = all_buffers ? 0: pfile->buffer->prev; |
93c80368 NB |
997 | |
998 | do | |
999 | do | |
1000 | cpp_get_token (pfile, &token); | |
1001 | while (token.type != CPP_EOF); | |
7463ef45 | 1002 | while (cpp_pop_buffer (pfile) != buffer); |
93c80368 NB |
1003 | } |
1004 | ||
1005 | /* Lookahead handling. */ | |
1006 | ||
1007 | static void | |
1008 | save_lookahead_token (pfile, token) | |
1009 | cpp_reader *pfile; | |
1010 | const cpp_token *token; | |
1011 | { | |
1012 | if (token->type != CPP_EOF) | |
1013 | { | |
1014 | cpp_lookahead *la = pfile->la_write; | |
1015 | cpp_token_with_pos *twp; | |
1016 | ||
1017 | if (la->count == la->cap) | |
711b8824 | 1018 | { |
93c80368 NB |
1019 | la->cap += la->cap + 8; |
1020 | la->tokens = (cpp_token_with_pos *) | |
1021 | xrealloc (la->tokens, la->cap * sizeof (cpp_token_with_pos)); | |
711b8824 | 1022 | } |
93c80368 NB |
1023 | |
1024 | twp = &la->tokens[la->count++]; | |
1025 | twp->token = *token; | |
1026 | twp->pos = *cpp_get_line (pfile); | |
711b8824 | 1027 | } |
711b8824 ZW |
1028 | } |
1029 | ||
93c80368 NB |
1030 | static void |
1031 | take_lookahead_token (pfile, token) | |
711b8824 | 1032 | cpp_reader *pfile; |
93c80368 | 1033 | cpp_token *token; |
711b8824 | 1034 | { |
93c80368 NB |
1035 | cpp_lookahead *la = pfile->la_read; |
1036 | cpp_token_with_pos *twp = &la->tokens[la->cur]; | |
711b8824 | 1037 | |
93c80368 NB |
1038 | *token = twp->token; |
1039 | pfile->lexer_pos = twp->pos; | |
711b8824 | 1040 | |
93c80368 | 1041 | if (++la->cur == la->count) |
b528a07e | 1042 | _cpp_release_lookahead (pfile); |
93c80368 | 1043 | } |
711b8824 | 1044 | |
93c80368 | 1045 | /* Moves the lookahead at the front of the read list to the free store. */ |
b528a07e NB |
1046 | void |
1047 | _cpp_release_lookahead (pfile) | |
93c80368 NB |
1048 | cpp_reader *pfile; |
1049 | { | |
1050 | cpp_lookahead *la = pfile->la_read; | |
711b8824 | 1051 | |
93c80368 NB |
1052 | pfile->la_read = la->next; |
1053 | la->next = pfile->la_unused; | |
1054 | pfile->la_unused = la; | |
1055 | unlock_pools (pfile); | |
1056 | } | |
711b8824 | 1057 | |
93c80368 NB |
1058 | /* Take a new lookahead from the free store, or allocate one if none. */ |
1059 | static cpp_lookahead * | |
1060 | alloc_lookahead (pfile) | |
1061 | cpp_reader *pfile; | |
1062 | { | |
1063 | cpp_lookahead *la = pfile->la_unused; | |
1064 | ||
1065 | if (la) | |
1066 | pfile->la_unused = la->next; | |
1067 | else | |
1068 | { | |
1069 | la = xnew (cpp_lookahead); | |
1070 | la->tokens = 0; | |
1071 | la->cap = 0; | |
1072 | } | |
1073 | ||
1074 | la->cur = la->count = 0; | |
1075 | return la; | |
711b8824 ZW |
1076 | } |
1077 | ||
93c80368 NB |
1078 | /* Free memory associated with a lookahead list. */ |
1079 | static void | |
1080 | free_lookahead (la) | |
1081 | cpp_lookahead *la; | |
711b8824 | 1082 | { |
93c80368 NB |
1083 | if (la->tokens) |
1084 | free ((PTR) la->tokens); | |
1085 | free ((PTR) la); | |
1086 | } | |
711b8824 | 1087 | |
93c80368 NB |
1088 | /* Free all the lookaheads of a cpp_reader. */ |
1089 | void | |
1090 | _cpp_free_lookaheads (pfile) | |
1091 | cpp_reader *pfile; | |
1092 | { | |
1093 | cpp_lookahead *la, *lan; | |
1094 | ||
1095 | if (pfile->la_read) | |
1096 | free_lookahead (pfile->la_read); | |
1097 | if (pfile->la_write) | |
1098 | free_lookahead (pfile->la_write); | |
1099 | ||
1100 | for (la = pfile->la_unused; la; la = lan) | |
1101 | { | |
1102 | lan = la->next; | |
1103 | free_lookahead (la); | |
1104 | } | |
1105 | } | |
711b8824 | 1106 | |
93c80368 NB |
1107 | /* Allocate a lookahead and move it to the front of the write list. */ |
1108 | void | |
1109 | cpp_start_lookahead (pfile) | |
711b8824 | 1110 | cpp_reader *pfile; |
711b8824 | 1111 | { |
93c80368 | 1112 | cpp_lookahead *la = alloc_lookahead (pfile); |
711b8824 | 1113 | |
93c80368 NB |
1114 | la->next = pfile->la_write; |
1115 | pfile->la_write = la; | |
711b8824 | 1116 | |
93c80368 | 1117 | la->pos = *cpp_get_line (pfile); |
711b8824 | 1118 | |
93c80368 NB |
1119 | /* Don't allow memory pools to be re-used whilst we're reading ahead. */ |
1120 | lock_pools (pfile); | |
1121 | } | |
711b8824 | 1122 | |
93c80368 NB |
1123 | /* Stop reading ahead - either step back, or drop the read ahead. */ |
1124 | void | |
1125 | cpp_stop_lookahead (pfile, drop) | |
1126 | cpp_reader *pfile; | |
1127 | int drop; | |
1128 | { | |
1129 | cpp_lookahead *la = pfile->la_write; | |
711b8824 | 1130 | |
93c80368 NB |
1131 | pfile->la_write = la->next; |
1132 | la->next = pfile->la_read; | |
1133 | pfile->la_read = la; | |
711b8824 | 1134 | |
93c80368 | 1135 | if (drop || la->count == 0) |
b528a07e | 1136 | _cpp_release_lookahead (pfile); |
93c80368 NB |
1137 | else |
1138 | pfile->lexer_pos = la->pos; | |
711b8824 ZW |
1139 | } |
1140 | ||
93c80368 NB |
1141 | /* Push a single token back to the front of the queue. Only to be |
1142 | used by cpplib, and only then when necessary. POS is the position | |
1143 | to report for the preceding token. */ | |
1144 | void | |
1145 | _cpp_push_token (pfile, token, pos) | |
1146 | cpp_reader *pfile; | |
1147 | const cpp_token *token; | |
1148 | const cpp_lexer_pos *pos; | |
1149 | { | |
1150 | cpp_start_lookahead (pfile); | |
1151 | save_lookahead_token (pfile, token); | |
1152 | cpp_stop_lookahead (pfile, 0); | |
1153 | pfile->lexer_pos = *pos; | |
1154 | } | |
1155 | ||
1156 | /* #define directive parsing and handling. */ | |
1157 | ||
1158 | /* Returns non-zero if a macro redefinition is trivial. */ | |
1159 | static int | |
1160 | check_macro_redefinition (pfile, node, macro2) | |
1161 | cpp_reader *pfile; | |
1162 | const cpp_hashnode *node; | |
1163 | const cpp_macro *macro2; | |
1164 | { | |
1165 | const cpp_macro *macro1; | |
1166 | unsigned int i; | |
1167 | ||
1168 | if (node->type != NT_MACRO || node->flags & NODE_BUILTIN) | |
1169 | return ! pfile->done_initializing; | |
1170 | ||
1171 | macro1 = node->value.macro; | |
1172 | ||
1173 | /* The quick failures. */ | |
1174 | if (macro1->count != macro2->count | |
1175 | || macro1->paramc != macro2->paramc | |
1176 | || macro1->fun_like != macro2->fun_like | |
28e0f040 | 1177 | || macro1->variadic != macro2->variadic) |
93c80368 NB |
1178 | return 0; |
1179 | ||
1180 | /* Check each token. */ | |
1181 | for (i = 0; i < macro1->count; i++) | |
1182 | if (! _cpp_equiv_tokens (¯o1->expansion[i], ¯o2->expansion[i])) | |
1183 | return 0; | |
1184 | ||
1185 | /* Check parameter spellings. */ | |
1186 | for (i = 0; i < macro1->paramc; i++) | |
1187 | if (macro1->params[i] != macro2->params[i]) | |
1188 | return 0; | |
1189 | ||
1190 | return 1; | |
1191 | } | |
1192 | ||
1193 | /* Free the definition of hashnode H. */ | |
711b8824 ZW |
1194 | |
1195 | void | |
1196 | _cpp_free_definition (h) | |
1197 | cpp_hashnode *h; | |
1198 | { | |
93c80368 NB |
1199 | /* Macros and assertions no longer have anything to free. */ |
1200 | h->type = NT_VOID; | |
1201 | /* Clear builtin flag in case of redefinition. */ | |
1202 | h->flags &= ~NODE_BUILTIN; | |
1203 | } | |
1204 | ||
1205 | static int | |
1206 | save_parameter (pfile, macro, node) | |
1207 | cpp_reader *pfile; | |
1208 | cpp_macro *macro; | |
1209 | cpp_hashnode *node; | |
1210 | { | |
1211 | cpp_hashnode **dest; | |
1212 | ||
1213 | /* Constraint 6.10.3.6 - duplicate parameter names. */ | |
1214 | if (node->arg_index) | |
709e9e50 | 1215 | { |
93c80368 NB |
1216 | cpp_error (pfile, "duplicate macro parameter \"%s\"", node->name); |
1217 | return 1; | |
1218 | } | |
709e9e50 | 1219 | |
93c80368 NB |
1220 | dest = ¯o->params[macro->paramc]; |
1221 | ||
1222 | /* Check we have room for the parameters. */ | |
1223 | if ((unsigned char *) (dest + 1) >= POOL_LIMIT (&pfile->macro_pool)) | |
1224 | { | |
1225 | _cpp_next_chunk (&pfile->macro_pool, sizeof (cpp_hashnode *), | |
1226 | (unsigned char **) ¯o->params); | |
1227 | dest = ¯o->params[macro->paramc]; | |
709e9e50 NB |
1228 | } |
1229 | ||
93c80368 NB |
1230 | *dest = node; |
1231 | node->arg_index = ++macro->paramc; | |
1232 | return 0; | |
711b8824 ZW |
1233 | } |
1234 | ||
93c80368 NB |
1235 | static int |
1236 | parse_params (pfile, macro) | |
711b8824 | 1237 | cpp_reader *pfile; |
93c80368 | 1238 | cpp_macro *macro; |
711b8824 | 1239 | { |
93c80368 NB |
1240 | cpp_token token; |
1241 | unsigned int prev_ident = 0; | |
711b8824 | 1242 | |
93c80368 NB |
1243 | macro->params = (cpp_hashnode **) POOL_FRONT (&pfile->macro_pool); |
1244 | for (;;) | |
711b8824 | 1245 | { |
93c80368 | 1246 | _cpp_lex_token (pfile, &token); |
711b8824 | 1247 | |
93c80368 | 1248 | switch (token.type) |
711b8824 | 1249 | { |
93c80368 NB |
1250 | default: |
1251 | cpp_error (pfile, "\"%s\" may not appear in macro parameter list", | |
1252 | cpp_token_as_text (pfile, &token)); | |
1253 | return 0; | |
1254 | ||
711b8824 | 1255 | case CPP_NAME: |
93c80368 NB |
1256 | if (prev_ident) |
1257 | { | |
1258 | cpp_error (pfile, "macro parameters must be comma-separated"); | |
1259 | return 0; | |
1260 | } | |
1261 | prev_ident = 1; | |
1262 | ||
1263 | if (save_parameter (pfile, macro, token.val.node)) | |
1264 | return 0; | |
1265 | continue; | |
711b8824 | 1266 | |
93c80368 NB |
1267 | case CPP_CLOSE_PAREN: |
1268 | if (prev_ident || macro->paramc == 0) | |
711b8824 | 1269 | break; |
711b8824 | 1270 | |
93c80368 NB |
1271 | /* Fall through to pick up the error. */ |
1272 | case CPP_COMMA: | |
1273 | if (!prev_ident) | |
1274 | { | |
1275 | cpp_error (pfile, "parameter name missing"); | |
1276 | return 0; | |
1277 | } | |
1278 | prev_ident = 0; | |
711b8824 ZW |
1279 | continue; |
1280 | ||
93c80368 | 1281 | case CPP_ELLIPSIS: |
28e0f040 | 1282 | macro->variadic = 1; |
93c80368 NB |
1283 | if (!prev_ident) |
1284 | { | |
1285 | save_parameter (pfile, macro, pfile->spec_nodes.n__VA_ARGS__); | |
1286 | pfile->state.va_args_ok = 1; | |
1287 | if (! CPP_OPTION (pfile, c99) && CPP_OPTION (pfile, pedantic)) | |
1288 | cpp_pedwarn (pfile, | |
28e0f040 | 1289 | "anonymous variadic macros were introduced in C99"); |
93c80368 NB |
1290 | } |
1291 | else if (CPP_OPTION (pfile, pedantic)) | |
28e0f040 | 1292 | cpp_pedwarn (pfile, "ISO C does not permit named variadic macros"); |
711b8824 | 1293 | |
93c80368 NB |
1294 | /* We're at the end, and just expect a closing parenthesis. */ |
1295 | _cpp_lex_token (pfile, &token); | |
1296 | if (token.type == CPP_CLOSE_PAREN) | |
1297 | break; | |
1298 | /* Fall through. */ | |
711b8824 | 1299 | |
93c80368 NB |
1300 | case CPP_EOF: |
1301 | cpp_error (pfile, "missing ')' in macro parameter list"); | |
1302 | return 0; | |
711b8824 ZW |
1303 | } |
1304 | ||
93c80368 NB |
1305 | /* Success. Commit the parameter array. */ |
1306 | POOL_COMMIT (&pfile->macro_pool, | |
1307 | macro->paramc * sizeof (cpp_hashnode *)); | |
1308 | return 1; | |
711b8824 | 1309 | } |
93c80368 NB |
1310 | } |
1311 | ||
1312 | /* Lex a token from a macro's replacement list. Translate it to a | |
1313 | CPP_MACRO_ARG if appropriate. */ | |
1314 | static cpp_token * | |
1315 | lex_expansion_token (pfile, macro) | |
1316 | cpp_reader *pfile; | |
1317 | cpp_macro *macro; | |
1318 | { | |
1319 | cpp_token *token = ¯o->expansion[macro->count]; | |
711b8824 | 1320 | |
93c80368 NB |
1321 | /* Check we have room for the token. */ |
1322 | if ((unsigned char *) (token + 1) >= POOL_LIMIT (&pfile->macro_pool)) | |
711b8824 | 1323 | { |
93c80368 NB |
1324 | _cpp_next_chunk (&pfile->macro_pool, sizeof (cpp_token), |
1325 | (unsigned char **) ¯o->expansion); | |
1326 | token = ¯o->expansion[macro->count]; | |
711b8824 ZW |
1327 | } |
1328 | ||
93c80368 NB |
1329 | macro->count++; |
1330 | _cpp_lex_token (pfile, token); | |
1331 | ||
1332 | /* Is this an argument? */ | |
1333 | if (token->type == CPP_NAME && token->val.node->arg_index) | |
1334 | { | |
1335 | token->type = CPP_MACRO_ARG; | |
6c53ebff | 1336 | token->val.arg_no = token->val.node->arg_index; |
93c80368 NB |
1337 | } |
1338 | else if (CPP_WTRADITIONAL (pfile) && macro->paramc > 0 | |
1339 | && (token->type == CPP_STRING || token->type == CPP_CHAR)) | |
1340 | check_trad_stringification (pfile, macro, &token->val.str); | |
1341 | ||
1342 | return token; | |
711b8824 ZW |
1343 | } |
1344 | ||
1345 | /* Parse a macro and save its expansion. Returns non-zero on success. */ | |
1346 | int | |
93c80368 | 1347 | _cpp_create_definition (pfile, node) |
711b8824 | 1348 | cpp_reader *pfile; |
93c80368 | 1349 | cpp_hashnode *node; |
711b8824 | 1350 | { |
93c80368 NB |
1351 | cpp_macro *macro; |
1352 | cpp_token *token; | |
1353 | unsigned int i, ok = 1; | |
1354 | ||
1355 | macro = (cpp_macro *) _cpp_pool_alloc (&pfile->macro_pool, | |
1356 | sizeof (cpp_macro)); | |
1357 | macro->file = pfile->buffer->nominal_fname; | |
1358 | macro->line = pfile->directive_pos.line; | |
1359 | macro->params = 0; | |
1360 | macro->paramc = 0; | |
1361 | macro->fun_like = 0; | |
28e0f040 | 1362 | macro->variadic = 0; |
93c80368 NB |
1363 | macro->count = 0; |
1364 | macro->expansion = (cpp_token *) POOL_FRONT (&pfile->macro_pool); | |
1365 | ||
1366 | /* Get the first token of the expansion (or the '(' of a | |
1367 | function-like macro). */ | |
1368 | token = lex_expansion_token (pfile, macro); | |
1369 | if (token->type == CPP_OPEN_PAREN && !(token->flags & PREV_WHITE)) | |
1370 | { | |
1371 | if (!(ok = parse_params (pfile, macro))) | |
1372 | goto cleanup; | |
1373 | macro->count = 0; | |
1374 | macro->fun_like = 1; | |
1375 | /* Some of the pool may have been used for the parameter store. */ | |
1376 | macro->expansion = (cpp_token *) POOL_FRONT (&pfile->macro_pool); | |
1377 | token = lex_expansion_token (pfile, macro); | |
1378 | } | |
1379 | else if (token->type != CPP_EOF && !(token->flags & PREV_WHITE)) | |
1380 | cpp_pedwarn (pfile, "ISO C requires whitespace after the macro name"); | |
711b8824 | 1381 | |
93c80368 NB |
1382 | /* Setting it here means we don't catch leading comments. */ |
1383 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
711b8824 | 1384 | |
93c80368 NB |
1385 | for (;;) |
1386 | { | |
1387 | /* Check the stringifying # constraint 6.10.3.2.1 of | |
1388 | function-like macros when lexing the subsequent token. */ | |
1389 | if (macro->count > 1 && token[-1].type == CPP_HASH && macro->fun_like) | |
1390 | { | |
1391 | if (token->type == CPP_MACRO_ARG) | |
1392 | { | |
1393 | token->flags &= ~PREV_WHITE; | |
1394 | token->flags |= STRINGIFY_ARG; | |
1395 | token->flags |= token[-1].flags & PREV_WHITE; | |
1396 | token[-1] = token[0]; | |
1397 | macro->count--; | |
1398 | } | |
1399 | /* Let assembler get away with murder. */ | |
bdb05a7b | 1400 | else if (CPP_OPTION (pfile, lang) != CLK_ASM) |
93c80368 NB |
1401 | { |
1402 | ok = 0; | |
1403 | cpp_error (pfile, "'#' is not followed by a macro parameter"); | |
1404 | goto cleanup; | |
1405 | } | |
1406 | } | |
1407 | ||
1408 | if (token->type == CPP_EOF) | |
1409 | break; | |
1410 | ||
1411 | /* Paste operator constraint 6.10.3.3.1. */ | |
1412 | if (token->type == CPP_PASTE) | |
1413 | { | |
1414 | /* Token-paste ##, can appear in both object-like and | |
1415 | function-like macros, but not at the ends. */ | |
1416 | if (--macro->count > 0) | |
1417 | token = lex_expansion_token (pfile, macro); | |
1418 | ||
1419 | if (macro->count == 0 || token->type == CPP_EOF) | |
1420 | { | |
1421 | ok = 0; | |
1422 | cpp_error (pfile, | |
1423 | "'##' cannot appear at either end of a macro expansion"); | |
1424 | goto cleanup; | |
1425 | } | |
711b8824 | 1426 | |
93c80368 NB |
1427 | token[-1].flags |= PASTE_LEFT; |
1428 | /* Give it a PREV_WHITE for -dM etc. */ | |
1429 | token->flags |= PREV_WHITE; | |
1430 | } | |
1431 | ||
1432 | token = lex_expansion_token (pfile, macro); | |
1433 | } | |
1434 | ||
4c2b647d NB |
1435 | /* Don't count the CPP_EOF. */ |
1436 | macro->count--; | |
93c80368 NB |
1437 | |
1438 | /* Clear the whitespace flag from the leading token. */ | |
1439 | macro->expansion[0].flags &= ~PREV_WHITE; | |
1440 | ||
44ed91a1 NB |
1441 | /* Implement the macro-defined-to-itself optimisation. */ |
1442 | macro->disabled = (macro->count == 1 && !macro->fun_like | |
1443 | && macro->expansion[0].type == CPP_NAME | |
1444 | && macro->expansion[0].val.node == node); | |
1445 | ||
93c80368 NB |
1446 | /* Commit the memory. */ |
1447 | POOL_COMMIT (&pfile->macro_pool, macro->count * sizeof (cpp_token)); | |
1448 | ||
1449 | /* Redefinition of a macro is allowed if and only if the old and new | |
1450 | definitions are the same. (6.10.3 paragraph 2). */ | |
1451 | if (node->type != NT_VOID) | |
711b8824 | 1452 | { |
93c80368 NB |
1453 | if (CPP_PEDANTIC (pfile) |
1454 | && !check_macro_redefinition (pfile, node, macro)) | |
711b8824 | 1455 | { |
93c80368 NB |
1456 | cpp_pedwarn_with_line (pfile, pfile->directive_pos.line, |
1457 | pfile->directive_pos.col, | |
1458 | "\"%s\" redefined", node->name); | |
1459 | ||
1460 | if (pfile->done_initializing && node->type == NT_MACRO | |
1461 | && !(node->flags & NODE_BUILTIN)) | |
711b8824 | 1462 | cpp_pedwarn_with_file_and_line (pfile, |
93c80368 NB |
1463 | node->value.macro->file, |
1464 | node->value.macro->line, 1, | |
711b8824 ZW |
1465 | "this is the location of the previous definition"); |
1466 | } | |
93c80368 | 1467 | _cpp_free_definition (node); |
711b8824 ZW |
1468 | } |
1469 | ||
1470 | /* Enter definition in hash table. */ | |
93c80368 NB |
1471 | node->type = NT_MACRO; |
1472 | node->value.macro = macro; | |
711b8824 | 1473 | |
93c80368 NB |
1474 | cleanup: |
1475 | ||
1476 | /* Stop the lexer accepting __VA_ARGS__. */ | |
1477 | pfile->state.va_args_ok = 0; | |
1478 | ||
1479 | /* Clear the fast argument lookup indices. */ | |
1480 | for (i = macro->paramc; i-- > 0; ) | |
1481 | macro->params[i]->arg_index = 0; | |
1482 | ||
1483 | return ok; | |
711b8824 ZW |
1484 | } |
1485 | ||
e1aa5140 KG |
1486 | /* Warn if a token in `string' matches one of the function macro |
1487 | arguments in `info'. This function assumes that the macro is a | |
1488 | function macro and not an object macro. */ | |
1489 | static void | |
93c80368 | 1490 | check_trad_stringification (pfile, macro, string) |
e1aa5140 | 1491 | cpp_reader *pfile; |
93c80368 | 1492 | const cpp_macro *macro; |
e1aa5140 KG |
1493 | const cpp_string *string; |
1494 | { | |
93c80368 | 1495 | unsigned int i, len; |
e1aa5140 KG |
1496 | const U_CHAR *p, *q, *limit = string->text + string->len; |
1497 | ||
1498 | /* Loop over the string. */ | |
1499 | for (p = string->text; p < limit; p = q) | |
1500 | { | |
e1aa5140 | 1501 | /* Find the start of an identifier. */ |
61c16b10 GM |
1502 | while (p < limit && !is_idstart (*p)) |
1503 | p++; | |
e1aa5140 KG |
1504 | |
1505 | /* Find the end of the identifier. */ | |
1506 | q = p; | |
61c16b10 GM |
1507 | while (q < limit && is_idchar (*q)) |
1508 | q++; | |
93c80368 NB |
1509 | |
1510 | len = q - p; | |
1511 | ||
e1aa5140 KG |
1512 | /* Loop over the function macro arguments to see if the |
1513 | identifier inside the string matches one of them. */ | |
93c80368 NB |
1514 | for (i = 0; i < macro->paramc; i++) |
1515 | { | |
1516 | const cpp_hashnode *node = macro->params[i]; | |
e1aa5140 | 1517 | |
93c80368 | 1518 | if (node->length == len && !memcmp (p, node->name, len)) |
e1aa5140 KG |
1519 | { |
1520 | cpp_warning (pfile, | |
93c80368 NB |
1521 | "macro argument \"%s\" would be stringified with -traditional.", |
1522 | node->name); | |
e1aa5140 KG |
1523 | break; |
1524 | } | |
1525 | } | |
1526 | } | |
1527 | } | |
93c80368 NB |
1528 | |
1529 | /* Returns the expansion of a macro, in a format suitable to be read | |
1530 | back in again, and therefore also for DWARF 2 debugging info. | |
1531 | Caller is expected to generate the "#define NAME" bit. The | |
1532 | returned text is temporary, and automatically freed later. */ | |
1533 | ||
1534 | const unsigned char * | |
1535 | cpp_macro_definition (pfile, node) | |
1536 | cpp_reader *pfile; | |
1537 | const cpp_hashnode *node; | |
1538 | { | |
1539 | unsigned int i, len; | |
1540 | const cpp_macro *macro = node->value.macro; | |
1541 | unsigned char *buffer; | |
1542 | ||
1543 | if (node->type != NT_MACRO || (node->flags & NODE_BUILTIN)) | |
1544 | { | |
1545 | cpp_ice (pfile, "invalid hash type %d in dump_definition", node->type); | |
1546 | return 0; | |
1547 | } | |
1548 | ||
1549 | /* Calculate length. */ | |
1550 | len = 1; /* ' ' */ | |
1551 | if (macro->fun_like) | |
1552 | { | |
1553 | len += 3; /* "()" plus possible final "." of ellipsis. */ | |
1554 | for (i = 0; i < macro->paramc; i++) | |
1555 | len += macro->params[i]->length + 2; /* ", " */ | |
1556 | } | |
1557 | ||
4c2b647d | 1558 | for (i = 0; i < macro->count; i++) |
93c80368 | 1559 | { |
4c2b647d | 1560 | cpp_token *token = ¯o->expansion[i]; |
93c80368 | 1561 | |
4c2b647d NB |
1562 | if (token->type == CPP_MACRO_ARG) |
1563 | len += macro->params[token->val.arg_no - 1]->length; | |
1564 | else | |
1565 | len += cpp_token_len (token); /* Includes room for ' '. */ | |
1566 | if (token->flags & STRINGIFY_ARG) | |
1567 | len++; /* "#" */ | |
1568 | if (token->flags & PASTE_LEFT) | |
1569 | len += 3; /* " ##" */ | |
93c80368 NB |
1570 | } |
1571 | ||
1572 | if (len > pfile->macro_buffer_len) | |
4b49c365 AO |
1573 | { |
1574 | pfile->macro_buffer = (U_CHAR *) xrealloc (pfile->macro_buffer, len); | |
1575 | pfile->macro_buffer_len = len; | |
1576 | } | |
93c80368 NB |
1577 | buffer = pfile->macro_buffer; |
1578 | ||
1579 | /* Parameter names. */ | |
1580 | if (macro->fun_like) | |
1581 | { | |
1582 | *buffer++ = '('; | |
1583 | for (i = 0; i < macro->paramc; i++) | |
1584 | { | |
1585 | cpp_hashnode *param = macro->params[i]; | |
1586 | ||
1587 | if (param != pfile->spec_nodes.n__VA_ARGS__) | |
1588 | { | |
1589 | memcpy (buffer, param->name, param->length); | |
1590 | buffer += param->length; | |
1591 | } | |
1592 | ||
1593 | if (i + 1 < macro->paramc) | |
1594 | *buffer++ = ',', *buffer++ = ' '; | |
28e0f040 | 1595 | else if (macro->variadic) |
93c80368 NB |
1596 | *buffer++ = '.', *buffer++ = '.', *buffer++ = '.'; |
1597 | } | |
1598 | *buffer++ = ')'; | |
1599 | } | |
1600 | ||
1601 | /* Expansion tokens. */ | |
4c2b647d | 1602 | if (macro->count) |
93c80368 NB |
1603 | { |
1604 | *buffer++ = ' '; | |
1605 | for (i = 0; i < macro->count; i++) | |
1606 | { | |
1607 | cpp_token *token = ¯o->expansion[i]; | |
1608 | ||
1609 | if (token->flags & PREV_WHITE) | |
1610 | *buffer++ = ' '; | |
1611 | if (token->flags & STRINGIFY_ARG) | |
1612 | *buffer++ = '#'; | |
1613 | ||
1614 | if (token->type == CPP_MACRO_ARG) | |
1615 | { | |
6c53ebff NB |
1616 | len = macro->params[token->val.arg_no - 1]->length; |
1617 | memcpy (buffer, macro->params[token->val.arg_no - 1]->name, len); | |
93c80368 NB |
1618 | buffer += len; |
1619 | } | |
1620 | else | |
1621 | buffer = cpp_spell_token (pfile, token, buffer); | |
1622 | ||
1623 | if (token->flags & PASTE_LEFT) | |
1624 | { | |
1625 | *buffer++ = ' '; | |
1626 | *buffer++ = '#'; | |
1627 | *buffer++ = '#'; | |
1628 | /* Next has PREV_WHITE; see _cpp_create_definition. */ | |
1629 | } | |
1630 | } | |
1631 | } | |
1632 | ||
1633 | *buffer = '\0'; | |
1634 | return pfile->macro_buffer; | |
1635 | } |