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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 | ||
93c80368 | 32 | struct cpp_macro |
711b8824 | 33 | { |
93c80368 NB |
34 | cpp_hashnode **params; /* Parameters, if any. */ |
35 | cpp_token *expansion; /* First token of replacement list. */ | |
36 | const char *file; /* Defined in file name. */ | |
37 | unsigned int line; /* Starting line number. */ | |
38 | unsigned int count; /* Number of tokens in expansion. */ | |
39 | unsigned short paramc; /* Number of parameters. */ | |
40 | unsigned int fun_like : 1; /* If a function-like macro. */ | |
28e0f040 | 41 | unsigned int variadic : 1; /* If a variadic macro. */ |
93c80368 | 42 | unsigned int disabled : 1; /* If macro is disabled. */ |
7065e130 | 43 | unsigned int syshdr : 1; /* If macro defined in system header. */ |
93c80368 NB |
44 | }; |
45 | ||
46 | typedef struct macro_arg macro_arg; | |
47 | struct macro_arg | |
48 | { | |
49 | cpp_token *first; /* First token in unexpanded argument. */ | |
50 | cpp_token *expanded; /* Macro-expanded argument. */ | |
51 | cpp_token *stringified; /* Stringified argument. */ | |
52 | unsigned int count; /* # of tokens in argument. */ | |
53 | unsigned int expanded_count; /* # of tokens in expanded argument. */ | |
711b8824 ZW |
54 | }; |
55 | ||
93c80368 NB |
56 | /* Macro expansion. */ |
57 | ||
58 | static void lock_pools PARAMS ((cpp_reader *)); | |
59 | static void unlock_pools PARAMS ((cpp_reader *)); | |
29b10746 | 60 | static int enter_macro_context PARAMS ((cpp_reader *, cpp_hashnode *)); |
93c80368 NB |
61 | static void builtin_macro PARAMS ((cpp_reader *, cpp_token *)); |
62 | static cpp_context *push_arg_context PARAMS ((cpp_reader *, macro_arg *)); | |
63 | static enum cpp_ttype parse_arg PARAMS ((cpp_reader *, macro_arg *, int)); | |
64 | static macro_arg *parse_args PARAMS ((cpp_reader *, const cpp_hashnode *)); | |
65 | static cpp_context *next_context PARAMS ((cpp_reader *)); | |
66 | static void expand_arg PARAMS ((cpp_reader *, macro_arg *)); | |
67 | static unsigned char *quote_string PARAMS ((unsigned char *, | |
68 | const unsigned char *, | |
69 | unsigned int)); | |
70 | static void make_string_token PARAMS ((cpp_pool *, cpp_token *, | |
71 | const U_CHAR *, unsigned int)); | |
72 | static void make_number_token PARAMS ((cpp_reader *, cpp_token *, int)); | |
73 | static void stringify_arg PARAMS ((cpp_reader *, macro_arg *)); | |
74 | static void paste_all_tokens PARAMS ((cpp_reader *, cpp_token *)); | |
d63eefbf | 75 | static int paste_tokens PARAMS ((cpp_reader *, cpp_token *, cpp_token *)); |
93c80368 NB |
76 | static int funlike_invocation_p PARAMS ((cpp_reader *, const cpp_hashnode *, |
77 | struct toklist *)); | |
78 | static void replace_args PARAMS ((cpp_reader *, cpp_macro *, macro_arg *, | |
79 | struct toklist *)); | |
80 | ||
81 | /* Lookaheads. */ | |
82 | ||
83 | static void save_lookahead_token PARAMS ((cpp_reader *, const cpp_token *)); | |
84 | static void take_lookahead_token PARAMS ((cpp_reader *, cpp_token *)); | |
93c80368 NB |
85 | static cpp_lookahead *alloc_lookahead PARAMS ((cpp_reader *)); |
86 | static void free_lookahead PARAMS ((cpp_lookahead *)); | |
87 | ||
88 | /* #define directive parsing and handling. */ | |
89 | ||
90 | static cpp_token *lex_expansion_token PARAMS ((cpp_reader *, cpp_macro *)); | |
618cdda7 NB |
91 | static int warn_of_redefinition PARAMS ((cpp_reader *, const cpp_hashnode *, |
92 | const cpp_macro *)); | |
93c80368 NB |
93 | static int save_parameter PARAMS ((cpp_reader *, cpp_macro *, cpp_hashnode *)); |
94 | static int parse_params PARAMS ((cpp_reader *, cpp_macro *)); | |
e1aa5140 | 95 | static void check_trad_stringification PARAMS ((cpp_reader *, |
93c80368 | 96 | const cpp_macro *, |
e1aa5140 | 97 | const cpp_string *)); |
711b8824 | 98 | |
93c80368 NB |
99 | /* Allocates a buffer to hold a token's TEXT, and converts TOKEN to a |
100 | CPP_STRING token containing TEXT in quoted form. */ | |
101 | static void | |
102 | make_string_token (pool, token, text, len) | |
103 | cpp_pool *pool; | |
104 | cpp_token *token; | |
105 | const U_CHAR *text; | |
106 | unsigned int len; | |
107 | { | |
108 | U_CHAR *buf = _cpp_pool_alloc (pool, len * 4); | |
109 | ||
110 | token->type = CPP_STRING; | |
111 | token->val.str.text = buf; | |
112 | token->val.str.len = quote_string (buf, text, len) - buf; | |
113 | token->flags = 0; | |
114 | } | |
115 | ||
116 | /* Allocates and converts a temporary token to a CPP_NUMBER token, | |
117 | evaluating to NUMBER. */ | |
118 | static void | |
119 | make_number_token (pfile, token, number) | |
120 | cpp_reader *pfile; | |
121 | cpp_token *token; | |
122 | int number; | |
123 | { | |
49fe13f6 | 124 | unsigned char *buf = _cpp_pool_alloc (&pfile->ident_pool, 20); |
93c80368 NB |
125 | |
126 | sprintf ((char *) buf, "%d", number); | |
127 | token->type = CPP_NUMBER; | |
128 | token->val.str.text = buf; | |
129 | token->val.str.len = ustrlen (buf); | |
130 | token->flags = 0; | |
131 | } | |
132 | ||
133 | static const char * const monthnames[] = | |
134 | { | |
135 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", | |
136 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" | |
137 | }; | |
138 | ||
139 | /* Handle builtin macros like __FILE__. */ | |
140 | static void | |
141 | builtin_macro (pfile, token) | |
142 | cpp_reader *pfile; | |
143 | cpp_token *token; | |
144 | { | |
bd969772 | 145 | unsigned char flags = ((token->flags & PREV_WHITE) | AVOID_LPASTE); |
93c80368 | 146 | cpp_hashnode *node = token->val.node; |
93c80368 NB |
147 | |
148 | switch (node->value.builtin) | |
149 | { | |
150 | case BT_FILE: | |
151 | case BT_BASE_FILE: | |
711b8824 | 152 | { |
0bda4760 NB |
153 | const char *name; |
154 | cpp_buffer *buffer = pfile->buffer; | |
155 | ||
156 | if (node->value.builtin == BT_BASE_FILE) | |
157 | while (buffer->prev) | |
158 | buffer = buffer->prev; | |
159 | ||
160 | name = buffer->nominal_fname; | |
49fe13f6 | 161 | make_string_token (&pfile->ident_pool, token, |
0bda4760 | 162 | (const unsigned char *) name, strlen (name)); |
711b8824 | 163 | } |
93c80368 NB |
164 | break; |
165 | ||
166 | case BT_INCLUDE_LEVEL: | |
167 | /* pfile->include_depth counts the primary source as level 1, | |
168 | but historically __INCLUDE_DEPTH__ has called the primary | |
169 | source level 0. */ | |
170 | make_number_token (pfile, token, pfile->include_depth - 1); | |
171 | break; | |
172 | ||
173 | case BT_SPECLINE: | |
174 | /* If __LINE__ is embedded in a macro, it must expand to the | |
175 | line of the macro's invocation, not its definition. | |
176 | Otherwise things like assert() will not work properly. */ | |
177 | make_number_token (pfile, token, cpp_get_line (pfile)->line); | |
178 | break; | |
179 | ||
180 | case BT_STDC: | |
181 | { | |
618cdda7 NB |
182 | int stdc = (!CPP_IN_SYSTEM_HEADER (pfile) |
183 | || pfile->spec_nodes.n__STRICT_ANSI__->type != NT_VOID); | |
93c80368 NB |
184 | make_number_token (pfile, token, stdc); |
185 | } | |
186 | break; | |
711b8824 | 187 | |
93c80368 NB |
188 | case BT_DATE: |
189 | case BT_TIME: | |
190 | if (pfile->date.type == CPP_EOF) | |
191 | { | |
192 | /* Allocate __DATE__ and __TIME__ from permanent storage, | |
193 | and save them in pfile so we don't have to do this again. | |
194 | We don't generate these strings at init time because | |
195 | time() and localtime() are very slow on some systems. */ | |
196 | time_t tt = time (NULL); | |
197 | struct tm *tb = localtime (&tt); | |
198 | ||
199 | make_string_token (&pfile->ident_pool, &pfile->date, | |
200 | DSC("Oct 11 1347")); | |
201 | make_string_token (&pfile->ident_pool, &pfile->time, | |
202 | DSC("12:34:56")); | |
203 | ||
204 | sprintf ((char *) pfile->date.val.str.text, "%s %2d %4d", | |
205 | monthnames[tb->tm_mon], tb->tm_mday, tb->tm_year + 1900); | |
206 | sprintf ((char *) pfile->time.val.str.text, "%02d:%02d:%02d", | |
207 | tb->tm_hour, tb->tm_min, tb->tm_sec); | |
208 | } | |
209 | *token = node->value.builtin == BT_DATE ? pfile->date: pfile->time; | |
210 | break; | |
211 | ||
212 | default: | |
213 | cpp_ice (pfile, "invalid builtin macro \"%s\"", node->name); | |
214 | break; | |
215 | } | |
bd969772 NB |
216 | |
217 | token->flags = flags; | |
711b8824 ZW |
218 | } |
219 | ||
93c80368 NB |
220 | /* Used by cpperror.c to obtain the correct line and column to report |
221 | in a diagnostic. */ | |
222 | const cpp_lexer_pos * | |
223 | cpp_get_line (pfile) | |
711b8824 | 224 | cpp_reader *pfile; |
711b8824 | 225 | { |
93c80368 NB |
226 | return &pfile->lexer_pos; |
227 | } | |
711b8824 | 228 | |
93c80368 NB |
229 | static void |
230 | lock_pools (pfile) | |
231 | cpp_reader *pfile; | |
232 | { | |
93c80368 | 233 | _cpp_lock_pool (&pfile->argument_pool); |
711b8824 ZW |
234 | } |
235 | ||
93c80368 NB |
236 | static void |
237 | unlock_pools (pfile) | |
238 | cpp_reader *pfile; | |
239 | { | |
93c80368 NB |
240 | _cpp_unlock_pool (&pfile->argument_pool); |
241 | } | |
711b8824 | 242 | |
93c80368 NB |
243 | /* Adds backslashes before all backslashes and double quotes appearing |
244 | in strings. Non-printable characters are converted to octal. */ | |
245 | static U_CHAR * | |
246 | quote_string (dest, src, len) | |
247 | U_CHAR *dest; | |
248 | const U_CHAR *src; | |
249 | unsigned int len; | |
250 | { | |
251 | while (len--) | |
252 | { | |
253 | U_CHAR c = *src++; | |
711b8824 | 254 | |
93c80368 NB |
255 | if (c == '\\' || c == '"') |
256 | { | |
257 | *dest++ = '\\'; | |
258 | *dest++ = c; | |
259 | } | |
260 | else | |
261 | { | |
262 | if (ISPRINT (c)) | |
263 | *dest++ = c; | |
264 | else | |
711b8824 | 265 | { |
93c80368 NB |
266 | sprintf ((char *) dest, "\\%03o", c); |
267 | dest += 4; | |
711b8824 | 268 | } |
93c80368 NB |
269 | } |
270 | } | |
711b8824 | 271 | |
93c80368 NB |
272 | return dest; |
273 | } | |
711b8824 | 274 | |
93c80368 NB |
275 | /* Convert a token sequence to a single string token according to the |
276 | rules of the ISO C #-operator. */ | |
277 | static void | |
278 | stringify_arg (pfile, arg) | |
279 | cpp_reader *pfile; | |
280 | macro_arg *arg; | |
281 | { | |
49fe13f6 | 282 | cpp_pool *pool = &pfile->ident_pool; |
93c80368 NB |
283 | unsigned char *start = POOL_FRONT (pool); |
284 | unsigned int i, escape_it, total_len = 0, backslash_count = 0; | |
711b8824 | 285 | |
93c80368 NB |
286 | /* Loop, reading in the argument's tokens. */ |
287 | for (i = 0; i < arg->count; i++) | |
288 | { | |
289 | unsigned char *dest; | |
290 | const cpp_token *token = &arg->first[i]; | |
291 | unsigned int len = cpp_token_len (token); | |
711b8824 | 292 | |
93c80368 NB |
293 | escape_it = (token->type == CPP_STRING || token->type == CPP_WSTRING |
294 | || token->type == CPP_CHAR || token->type == CPP_WCHAR | |
295 | || token->type == CPP_OSTRING); | |
711b8824 | 296 | |
93c80368 NB |
297 | if (escape_it) |
298 | /* Worst case is each char is octal. */ | |
299 | len *= 4; | |
300 | len++; /* Room for initial space. */ | |
711b8824 | 301 | |
93c80368 NB |
302 | dest = &start[total_len]; |
303 | if (dest + len > POOL_LIMIT (pool)) | |
304 | { | |
305 | _cpp_next_chunk (pool, len, (unsigned char **) &start); | |
306 | dest = &start[total_len]; | |
307 | } | |
711b8824 | 308 | |
93c80368 | 309 | /* No leading white space. */ |
4c2b647d NB |
310 | if (token->flags & PREV_WHITE && total_len > 0) |
311 | *dest++ = ' '; | |
711b8824 | 312 | |
93c80368 NB |
313 | if (escape_it) |
314 | { | |
315 | unsigned char *buf = (unsigned char *) xmalloc (len); | |
316 | ||
317 | len = cpp_spell_token (pfile, token, buf) - buf; | |
318 | dest = quote_string (dest, buf, len); | |
319 | free (buf); | |
320 | } | |
321 | else | |
322 | dest = cpp_spell_token (pfile, token, dest); | |
323 | total_len = dest - start; | |
324 | ||
6c53ebff | 325 | if (token->type == CPP_OTHER && token->val.c == '\\') |
93c80368 NB |
326 | backslash_count++; |
327 | else | |
328 | backslash_count = 0; | |
329 | } | |
330 | ||
331 | /* Ignore the final \ of invalid string literals. */ | |
332 | if (backslash_count & 1) | |
333 | { | |
334 | cpp_warning (pfile, "invalid string literal, ignoring final '\\'"); | |
335 | total_len--; | |
336 | } | |
337 | ||
338 | POOL_COMMIT (pool, total_len); | |
339 | ||
340 | arg->stringified = xnew (cpp_token); | |
341 | arg->stringified->flags = 0; | |
342 | arg->stringified->type = CPP_STRING; | |
343 | arg->stringified->val.str.text = start; | |
344 | arg->stringified->val.str.len = total_len; | |
345 | } | |
346 | ||
d63eefbf NB |
347 | /* Try to paste two tokens. On success, the LHS becomes the pasted |
348 | token, and 0 is returned. For failure, we update the flags of the | |
349 | RHS appropriately and return non-zero. */ | |
350 | static int | |
351 | paste_tokens (pfile, lhs, rhs) | |
352 | cpp_reader *pfile; | |
353 | cpp_token *lhs, *rhs; | |
354 | { | |
355 | unsigned char flags; | |
356 | int digraph = 0; | |
357 | enum cpp_ttype type; | |
358 | ||
359 | type = cpp_can_paste (pfile, lhs, rhs, &digraph); | |
360 | ||
361 | if (type == CPP_EOF) | |
362 | { | |
6a6b1628 NB |
363 | /* Mandatory warning for all apart from assembler. */ |
364 | if (CPP_OPTION (pfile, lang) != CLK_ASM) | |
d63eefbf NB |
365 | cpp_warning (pfile, |
366 | "pasting \"%s\" and \"%s\" does not give a valid preprocessing token", | |
367 | cpp_token_as_text (pfile, lhs), | |
368 | cpp_token_as_text (pfile, rhs)); | |
369 | ||
370 | /* The standard states that behaviour is undefined. By the | |
6a6b1628 NB |
371 | principle of least surpise, we step back before the RHS, and |
372 | mark it to prevent macro expansion. Tests in the testsuite | |
373 | rely on clearing PREV_WHITE here, though you could argue we | |
374 | should actually set it. Assembler can have '.' in labels and | |
375 | so requires that we don't insert spaces there. Maybe we should | |
376 | change this to put out a space unless it's assembler. */ | |
d63eefbf NB |
377 | rhs->flags &= ~PREV_WHITE; |
378 | rhs->flags |= NO_EXPAND; | |
379 | return 1; | |
380 | } | |
381 | ||
382 | flags = lhs->flags & ~DIGRAPH; | |
383 | if (digraph) | |
384 | flags |= DIGRAPH; | |
385 | ||
386 | /* Identifiers and numbers need spellings to be pasted. */ | |
387 | if (type == CPP_NAME || type == CPP_NUMBER) | |
388 | { | |
389 | unsigned int total_len = cpp_token_len (lhs) + cpp_token_len (rhs); | |
390 | unsigned char *result, *end; | |
d63eefbf | 391 | |
49fe13f6 | 392 | result = _cpp_pool_alloc (&pfile->ident_pool, total_len + 1); |
d63eefbf NB |
393 | |
394 | /* Paste the spellings and null terminate. */ | |
395 | end = cpp_spell_token (pfile, rhs, cpp_spell_token (pfile, lhs, result)); | |
396 | *end = '\0'; | |
397 | total_len = end - result; | |
398 | ||
399 | if (type == CPP_NAME) | |
400 | { | |
401 | lhs->val.node = cpp_lookup (pfile, result, total_len); | |
402 | if (lhs->val.node->flags & NODE_OPERATOR) | |
403 | { | |
404 | flags |= NAMED_OP; | |
405 | lhs->type = lhs->val.node->value.operator; | |
406 | } | |
407 | } | |
408 | else | |
409 | { | |
410 | lhs->val.str.text = result; | |
411 | lhs->val.str.len = total_len; | |
412 | } | |
413 | } | |
414 | else if (type == CPP_WCHAR || type == CPP_WSTRING) | |
415 | lhs->val.str = rhs->val.str; | |
416 | ||
417 | /* Set type and flags after pasting spellings. */ | |
418 | lhs->type = type; | |
419 | lhs->flags = flags; | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
93c80368 NB |
424 | /* Handles an arbitrarily long sequence of ## operators. This |
425 | implementation is left-associative, non-recursive, and finishes a | |
d63eefbf NB |
426 | paste before handling succeeding ones. If the paste fails, we back |
427 | up a token to just after the ## operator, with the effect that it | |
428 | appears in the output stream normally. */ | |
93c80368 NB |
429 | static void |
430 | paste_all_tokens (pfile, lhs) | |
431 | cpp_reader *pfile; | |
432 | cpp_token *lhs; | |
433 | { | |
93c80368 | 434 | cpp_token *rhs; |
d63eefbf | 435 | unsigned char orig_flags = lhs->flags; |
93c80368 NB |
436 | |
437 | do | |
438 | { | |
439 | /* Take the token directly from the current context. We can do | |
440 | this, because we are in the replacement list of either an | |
441 | object-like macro, or a function-like macro with arguments | |
442 | inserted. In either case, the constraints to #define | |
d63eefbf | 443 | guarantee we have at least one more token. */ |
93c80368 | 444 | rhs = pfile->context->list.first++; |
d63eefbf | 445 | if (paste_tokens (pfile, lhs, rhs)) |
93c80368 | 446 | { |
d63eefbf | 447 | /* We failed. Step back so we read the RHS in next. */ |
4c2b647d NB |
448 | pfile->context->list.first--; |
449 | break; | |
93c80368 | 450 | } |
93c80368 NB |
451 | } |
452 | while (rhs->flags & PASTE_LEFT); | |
453 | ||
454 | /* The pasted token has the PREV_WHITE flag of the LHS, is no longer | |
455 | PASTE_LEFT, and is subject to macro expansion. */ | |
456 | lhs->flags &= ~(PREV_WHITE | PASTE_LEFT | NO_EXPAND); | |
bd969772 | 457 | lhs->flags |= orig_flags & (PREV_WHITE | AVOID_LPASTE); |
93c80368 NB |
458 | } |
459 | ||
4c2b647d | 460 | /* Reads the unexpanded tokens of a macro argument into ARG. VAR_ARGS |
28e0f040 NB |
461 | is non-zero if this is a variadic macro. Returns the type of the |
462 | token that caused reading to finish. */ | |
93c80368 | 463 | static enum cpp_ttype |
28e0f040 | 464 | parse_arg (pfile, arg, variadic) |
93c80368 NB |
465 | cpp_reader *pfile; |
466 | struct macro_arg *arg; | |
28e0f040 | 467 | int variadic; |
93c80368 NB |
468 | { |
469 | enum cpp_ttype result; | |
470 | unsigned int paren = 0; | |
8d9e9a08 | 471 | unsigned int line; |
93c80368 NB |
472 | |
473 | arg->first = (cpp_token *) POOL_FRONT (&pfile->argument_pool); | |
474 | for (;; arg->count++) | |
475 | { | |
476 | cpp_token *token = &arg->first[arg->count]; | |
477 | if ((unsigned char *) (token + 1) >= POOL_LIMIT (&pfile->argument_pool)) | |
478 | { | |
479 | _cpp_next_chunk (&pfile->argument_pool, sizeof (cpp_token), | |
480 | (unsigned char **) &arg->first); | |
481 | token = &arg->first[arg->count]; | |
482 | } | |
483 | ||
8d9e9a08 NB |
484 | /* Newlines in arguments are white space (6.10.3.10). */ |
485 | line = pfile->lexer_pos.output_line; | |
7f2f1a66 | 486 | cpp_get_token (pfile, token); |
8d9e9a08 NB |
487 | if (line != pfile->lexer_pos.output_line) |
488 | token->flags |= PREV_WHITE; | |
93c80368 | 489 | |
8d9e9a08 | 490 | result = token->type; |
93c80368 NB |
491 | if (result == CPP_OPEN_PAREN) |
492 | paren++; | |
493 | else if (result == CPP_CLOSE_PAREN && paren-- == 0) | |
494 | break; | |
28e0f040 NB |
495 | /* Commas are not terminators within parantheses or variadic. */ |
496 | else if (result == CPP_COMMA && paren == 0 && !variadic) | |
93c80368 NB |
497 | break; |
498 | else if (result == CPP_EOF) | |
499 | break; /* Error reported by caller. */ | |
93c80368 | 500 | } |
711b8824 | 501 | |
93c80368 NB |
502 | /* Commit the memory used to store the arguments. */ |
503 | POOL_COMMIT (&pfile->argument_pool, arg->count * sizeof (cpp_token)); | |
504 | ||
505 | return result; | |
711b8824 ZW |
506 | } |
507 | ||
93c80368 NB |
508 | /* Parse the arguments making up a macro invocation. */ |
509 | static macro_arg * | |
510 | parse_args (pfile, node) | |
511 | cpp_reader *pfile; | |
512 | const cpp_hashnode *node; | |
513 | { | |
514 | cpp_macro *macro = node->value.macro; | |
515 | macro_arg *args, *cur; | |
516 | enum cpp_ttype type; | |
517 | int argc, error = 0; | |
518 | ||
519 | /* Allocate room for at least one argument, and zero it out. */ | |
520 | argc = macro->paramc ? macro->paramc: 1; | |
521 | args = xcnewvec (macro_arg, argc); | |
522 | ||
523 | for (cur = args, argc = 0; ;) | |
524 | { | |
525 | argc++; | |
526 | ||
28e0f040 | 527 | type = parse_arg (pfile, cur, argc == macro->paramc && macro->variadic); |
93c80368 NB |
528 | if (type == CPP_CLOSE_PAREN || type == CPP_EOF) |
529 | break; | |
530 | ||
531 | /* Re-use the last argument for excess arguments. */ | |
532 | if (argc < macro->paramc) | |
533 | cur++; | |
534 | } | |
535 | ||
536 | if (type == CPP_EOF) | |
537 | { | |
538 | cpp_error (pfile, "unterminated argument list invoking macro \"%s\"", | |
539 | node->name); | |
540 | error = 1; | |
541 | } | |
542 | else if (argc < macro->paramc) | |
543 | { | |
544 | /* As an extension, a rest argument is allowed to not appear in | |
545 | the invocation at all. | |
546 | e.g. #define debug(format, args...) something | |
547 | debug("string"); | |
548 | ||
549 | This is exactly the same as if there had been an empty rest | |
550 | argument - debug("string", ). */ | |
551 | ||
28e0f040 | 552 | if (argc + 1 == macro->paramc && macro->variadic) |
93c80368 | 553 | { |
7065e130 | 554 | if (CPP_PEDANTIC (pfile) && ! macro->syshdr) |
93c80368 NB |
555 | cpp_pedwarn (pfile, "ISO C99 requires rest arguments to be used"); |
556 | } | |
557 | else | |
558 | { | |
559 | cpp_error (pfile, | |
560 | "macro \"%s\" requires %u arguments, but only %u given", | |
561 | node->name, macro->paramc, argc); | |
562 | error = 1; | |
563 | } | |
564 | } | |
565 | else if (argc > macro->paramc) | |
566 | { | |
4c2b647d NB |
567 | /* Empty argument to a macro taking no arguments is OK. */ |
568 | if (argc != 1 || cur->count) | |
93c80368 NB |
569 | { |
570 | cpp_error (pfile, | |
571 | "macro \"%s\" passed %u arguments, but takes just %u", | |
572 | node->name, argc, macro->paramc); | |
573 | error = 1; | |
574 | } | |
575 | } | |
576 | ||
577 | if (error) | |
578 | { | |
579 | free (args); | |
580 | args = 0; | |
581 | } | |
582 | ||
583 | return args; | |
584 | } | |
585 | ||
586 | static int | |
587 | funlike_invocation_p (pfile, node, list) | |
588 | cpp_reader *pfile; | |
589 | const cpp_hashnode *node; | |
590 | struct toklist *list; | |
591 | { | |
673b13e2 | 592 | cpp_context *orig; |
93c80368 NB |
593 | cpp_token maybe_paren; |
594 | macro_arg *args = 0; | |
8d9e9a08 | 595 | cpp_lexer_pos macro_pos; |
93c80368 | 596 | |
8d9e9a08 | 597 | macro_pos = pfile->lexer_pos; |
93c80368 NB |
598 | pfile->state.parsing_args = 1; |
599 | pfile->state.prevent_expansion++; | |
8aaef6e0 | 600 | orig = pfile->context; |
93c80368 NB |
601 | |
602 | cpp_start_lookahead (pfile); | |
603 | cpp_get_token (pfile, &maybe_paren); | |
604 | cpp_stop_lookahead (pfile, maybe_paren.type == CPP_OPEN_PAREN); | |
605 | ||
606 | if (maybe_paren.type == CPP_OPEN_PAREN) | |
607 | args = parse_args (pfile, node); | |
7065e130 | 608 | else if (CPP_WTRADITIONAL (pfile) && ! node->value.macro->syshdr) |
93c80368 NB |
609 | cpp_warning (pfile, |
610 | "function-like macro \"%s\" must be used with arguments in traditional C", | |
611 | node->name); | |
612 | ||
613 | /* Restore original context. */ | |
8aaef6e0 | 614 | pfile->context = orig; |
93c80368 NB |
615 | pfile->state.prevent_expansion--; |
616 | pfile->state.parsing_args = 0; | |
617 | ||
618 | if (args) | |
619 | { | |
8d9e9a08 NB |
620 | /* The macro's expansion appears where the name would have. */ |
621 | pfile->lexer_pos = macro_pos; | |
622 | ||
93c80368 | 623 | if (node->value.macro->paramc > 0) |
7f2f1a66 NB |
624 | { |
625 | /* Don't save tokens during pre-expansion. */ | |
626 | struct cpp_lookahead *la_saved = pfile->la_write; | |
627 | pfile->la_write = 0; | |
628 | replace_args (pfile, node->value.macro, args, list); | |
629 | pfile->la_write = la_saved; | |
630 | } | |
93c80368 NB |
631 | free (args); |
632 | } | |
633 | ||
634 | return args != 0; | |
635 | } | |
636 | ||
637 | /* Push the context of a macro onto the context stack. TOKEN is the | |
638 | macro name. If we can successfully start expanding the macro, | |
a5c3cccd NB |
639 | TOKEN is replaced with the first token of the expansion, and we |
640 | return non-zero. */ | |
711b8824 | 641 | static int |
29b10746 | 642 | enter_macro_context (pfile, node) |
711b8824 | 643 | cpp_reader *pfile; |
29b10746 | 644 | cpp_hashnode *node; |
711b8824 | 645 | { |
93c80368 | 646 | cpp_context *context; |
29b10746 | 647 | cpp_macro *macro = node->value.macro; |
93c80368 | 648 | struct toklist list; |
711b8824 | 649 | |
93c80368 NB |
650 | /* Save the position of the outermost macro invocation. */ |
651 | if (!pfile->context->prev) | |
8d9e9a08 | 652 | lock_pools (pfile); |
711b8824 | 653 | |
29b10746 | 654 | if (macro->fun_like && !funlike_invocation_p (pfile, node, &list)) |
93c80368 NB |
655 | { |
656 | if (!pfile->context->prev) | |
657 | unlock_pools (pfile); | |
a5c3cccd | 658 | return 0; |
93c80368 | 659 | } |
711b8824 | 660 | |
93c80368 | 661 | if (macro->paramc == 0) |
711b8824 | 662 | { |
4c2b647d NB |
663 | list.first = macro->expansion; |
664 | list.limit = macro->expansion + macro->count; | |
711b8824 | 665 | } |
4c2b647d | 666 | |
26ec42ee | 667 | /* Only push a macro context for non-empty replacement lists. */ |
29b10746 NB |
668 | if (list.first != list.limit) |
669 | { | |
29b10746 NB |
670 | context = next_context (pfile); |
671 | context->list = list; | |
672 | context->macro = macro; | |
26ec42ee | 673 | |
29b10746 NB |
674 | /* Disable the macro within its expansion. */ |
675 | macro->disabled = 1; | |
676 | } | |
93c80368 | 677 | |
a5c3cccd | 678 | return 1; |
93c80368 NB |
679 | } |
680 | ||
681 | /* Move to the next context. Create one if there is none. */ | |
682 | static cpp_context * | |
683 | next_context (pfile) | |
684 | cpp_reader *pfile; | |
685 | { | |
686 | cpp_context *prev = pfile->context; | |
687 | cpp_context *result = prev->next; | |
688 | ||
689 | if (result == 0) | |
711b8824 | 690 | { |
93c80368 NB |
691 | result = xnew (cpp_context); |
692 | prev->next = result; | |
693 | result->prev = prev; | |
694 | result->next = 0; | |
711b8824 ZW |
695 | } |
696 | ||
93c80368 NB |
697 | pfile->context = result; |
698 | return result; | |
699 | } | |
700 | ||
701 | static void | |
702 | replace_args (pfile, macro, args, list) | |
703 | cpp_reader *pfile; | |
704 | cpp_macro *macro; | |
705 | macro_arg *args; | |
706 | struct toklist *list; | |
707 | { | |
26ec42ee | 708 | unsigned char flags = 0; |
93c80368 NB |
709 | unsigned int i, total; |
710 | const cpp_token *src, *limit; | |
711 | cpp_token *dest; | |
712 | macro_arg *arg; | |
713 | ||
714 | src = macro->expansion; | |
715 | limit = src + macro->count; | |
716 | ||
717 | /* First, fully macro-expand arguments, calculating the number of | |
718 | tokens in the final expansion as we go. This ensures that the | |
719 | possible recursive use of argument_pool is fine. */ | |
720 | total = limit - src; | |
721 | for (; src < limit; src++) | |
722 | if (src->type == CPP_MACRO_ARG) | |
723 | { | |
724 | /* We have an argument. If it is not being stringified or | |
725 | pasted it is macro-replaced before insertion. */ | |
6c53ebff | 726 | arg = &args[src->val.arg_no - 1]; |
4c2b647d | 727 | |
93c80368 NB |
728 | if (src->flags & STRINGIFY_ARG) |
729 | { | |
730 | if (!arg->stringified) | |
731 | stringify_arg (pfile, arg); | |
732 | } | |
733 | else if ((src->flags & PASTE_LEFT) | |
734 | || (src > macro->expansion && (src[-1].flags & PASTE_LEFT))) | |
735 | total += arg->count - 1; | |
736 | else | |
737 | { | |
738 | if (!arg->expanded) | |
4c2b647d NB |
739 | { |
740 | arg->expanded_count = 0; | |
741 | if (arg->count) | |
742 | expand_arg (pfile, arg); | |
743 | } | |
93c80368 NB |
744 | total += arg->expanded_count - 1; |
745 | } | |
746 | } | |
747 | ||
748 | dest = (cpp_token *) _cpp_pool_alloc (&pfile->argument_pool, | |
749 | total * sizeof (cpp_token)); | |
750 | list->first = dest; | |
93c80368 NB |
751 | |
752 | for (src = macro->expansion; src < limit; src++) | |
753 | if (src->type == CPP_MACRO_ARG) | |
754 | { | |
755 | unsigned int count; | |
756 | const cpp_token *from; | |
757 | ||
6c53ebff | 758 | arg = &args[src->val.arg_no - 1]; |
93c80368 NB |
759 | if (src->flags & STRINGIFY_ARG) |
760 | from = arg->stringified, count = 1; | |
4c2b647d | 761 | else if (src->flags & PASTE_LEFT) |
93c80368 | 762 | count = arg->count, from = arg->first; |
4c2b647d NB |
763 | else if (src > macro->expansion && (src[-1].flags & PASTE_LEFT)) |
764 | { | |
765 | count = arg->count, from = arg->first; | |
766 | if (dest != list->first) | |
767 | { | |
768 | /* GCC has special semantics for , ## b where b is a | |
769 | varargs parameter: the comma disappears if b was | |
770 | given no actual arguments (not merely if b is an | |
771 | empty argument); otherwise pasting is turned off. */ | |
772 | if (dest[-1].type == CPP_COMMA | |
28e0f040 | 773 | && macro->variadic |
4c2b647d NB |
774 | && src->val.arg_no == macro->paramc) |
775 | { | |
776 | if (count == 0) | |
777 | dest--; | |
778 | else | |
779 | dest[-1].flags &= ~PASTE_LEFT; | |
780 | } | |
781 | /* Count == 0 is the RHS a placemarker case. */ | |
782 | else if (count == 0) | |
783 | dest[-1].flags &= ~PASTE_LEFT; | |
784 | } | |
785 | } | |
93c80368 NB |
786 | else |
787 | count = arg->expanded_count, from = arg->expanded; | |
93c80368 | 788 | |
4c2b647d NB |
789 | /* Count == 0 is the LHS a placemarker case. */ |
790 | if (count) | |
791 | { | |
792 | memcpy (dest, from, count * sizeof (cpp_token)); | |
793 | ||
794 | /* The first token gets PREV_WHITE of the CPP_MACRO_ARG. */ | |
795 | dest->flags &= ~PREV_WHITE; | |
796 | dest->flags |= src->flags & PREV_WHITE; | |
bd969772 | 797 | dest->flags |= AVOID_LPASTE; |
93c80368 | 798 | |
4c2b647d NB |
799 | /* The last token gets the PASTE_LEFT of the CPP_MACRO_ARG. */ |
800 | dest[count - 1].flags |= src->flags & PASTE_LEFT; | |
93c80368 | 801 | |
4c2b647d NB |
802 | dest += count; |
803 | } | |
26ec42ee NB |
804 | |
805 | /* The token after the argument must avoid an accidental paste. */ | |
806 | flags = AVOID_LPASTE; | |
93c80368 NB |
807 | } |
808 | else | |
26ec42ee NB |
809 | { |
810 | *dest = *src; | |
811 | dest->flags |= flags; | |
812 | dest++; | |
813 | flags = 0; | |
814 | } | |
93c80368 | 815 | |
4c2b647d NB |
816 | list->limit = dest; |
817 | ||
93c80368 NB |
818 | /* Free the expanded arguments. */ |
819 | for (i = 0; i < macro->paramc; i++) | |
711b8824 | 820 | { |
93c80368 NB |
821 | if (args[i].expanded) |
822 | free (args[i].expanded); | |
823 | if (args[i].stringified) | |
824 | free (args[i].stringified); | |
825 | } | |
826 | } | |
827 | ||
828 | /* Subroutine of expand_arg to put the unexpanded tokens on the | |
829 | context stack. */ | |
830 | static cpp_context * | |
831 | push_arg_context (pfile, arg) | |
832 | cpp_reader *pfile; | |
833 | macro_arg *arg; | |
834 | { | |
835 | cpp_context *context = next_context (pfile); | |
836 | context->macro = 0; | |
837 | context->list.first = arg->first; | |
838 | context->list.limit = arg->first + arg->count; | |
839 | ||
840 | return context; | |
841 | } | |
842 | ||
843 | static void | |
844 | expand_arg (pfile, arg) | |
845 | cpp_reader *pfile; | |
846 | macro_arg *arg; | |
847 | { | |
848 | cpp_token *token; | |
849 | unsigned int capacity = 256; | |
850 | ||
851 | /* Loop, reading in the arguments. */ | |
852 | arg->expanded = (cpp_token *) xmalloc (capacity * sizeof (cpp_token)); | |
93c80368 NB |
853 | |
854 | push_arg_context (pfile, arg); | |
855 | do | |
856 | { | |
857 | if (arg->expanded_count >= capacity) | |
711b8824 | 858 | { |
93c80368 NB |
859 | capacity *= 2; |
860 | arg->expanded = (cpp_token *) | |
861 | xrealloc (arg->expanded, capacity * sizeof (cpp_token)); | |
862 | } | |
863 | token = &arg->expanded[arg->expanded_count++]; | |
7f2f1a66 | 864 | cpp_get_token (pfile, token); |
93c80368 NB |
865 | } |
866 | while (token->type != CPP_EOF); | |
867 | ||
868 | arg->expanded_count--; | |
869 | ||
870 | /* Pop the context we pushed. */ | |
871 | pfile->context = pfile->context->prev; | |
872 | } | |
873 | ||
874 | void | |
875 | _cpp_pop_context (pfile) | |
876 | cpp_reader *pfile; | |
877 | { | |
878 | cpp_context *context = pfile->context; | |
879 | ||
880 | pfile->context = context->prev; | |
8aaef6e0 NB |
881 | if (!pfile->context->prev && !pfile->state.parsing_args) |
882 | unlock_pools (pfile); | |
883 | ||
884 | /* Re-enable a macro, temporarily if parsing_args, when leaving its | |
885 | expansion. */ | |
886 | context->macro->disabled = 0; | |
93c80368 NB |
887 | } |
888 | ||
7f2f1a66 NB |
889 | /* Eternal routine to get a token. Also used nearly everywhere |
890 | internally, except for places where we know we can safely call | |
891 | the lexer directly, such as lexing a directive name. | |
892 | ||
893 | Macro expansions and directives are transparently handled, | |
894 | including entering included files. Thus tokens are post-macro | |
895 | expansion, and after any intervening directives. External callers | |
896 | see CPP_EOF only at EOF. Internal callers also see it when meeting | |
897 | a directive inside a macro call, when at the end of a directive and | |
898 | state.in_directive is still 1, and at the end of argument | |
899 | pre-expansion. */ | |
93c80368 | 900 | void |
7f2f1a66 | 901 | cpp_get_token (pfile, token) |
93c80368 NB |
902 | cpp_reader *pfile; |
903 | cpp_token *token; | |
904 | { | |
29b10746 | 905 | for (;;) |
93c80368 NB |
906 | { |
907 | cpp_context *context = pfile->context; | |
908 | ||
909 | if (pfile->la_read) | |
910 | take_lookahead_token (pfile, token); | |
911 | /* Context->prev == 0 <=> base context. */ | |
912 | else if (!context->prev) | |
913 | _cpp_lex_token (pfile, token); | |
914 | else if (context->list.first != context->list.limit) | |
29b10746 NB |
915 | { |
916 | *token = *context->list.first++; | |
bd969772 NB |
917 | token->flags |= pfile->buffer->saved_flags; |
918 | pfile->buffer->saved_flags = 0; | |
7f2f1a66 | 919 | /* PASTE_LEFT tokens can only appear in macro expansions. */ |
8d9e9a08 | 920 | if (token->flags & PASTE_LEFT) |
ec1a23e6 NB |
921 | { |
922 | paste_all_tokens (pfile, token); | |
bd969772 | 923 | pfile->buffer->saved_flags = AVOID_LPASTE; |
ec1a23e6 | 924 | } |
29b10746 | 925 | } |
93c80368 NB |
926 | else |
927 | { | |
928 | if (context->macro) | |
711b8824 | 929 | { |
26ec42ee | 930 | /* Avoid accidental paste at the end of a macro. */ |
bd969772 | 931 | pfile->buffer->saved_flags |= AVOID_LPASTE; |
93c80368 | 932 | _cpp_pop_context (pfile); |
29b10746 | 933 | continue; |
711b8824 | 934 | } |
a949941c | 935 | /* End of argument pre-expansion. */ |
93c80368 NB |
936 | token->type = CPP_EOF; |
937 | token->flags = 0; | |
b528a07e | 938 | return; |
93c80368 | 939 | } |
93c80368 | 940 | |
a5c3cccd | 941 | if (token->type != CPP_NAME) |
93c80368 NB |
942 | break; |
943 | ||
a5c3cccd NB |
944 | /* Handle macros and the _Pragma operator. */ |
945 | if (token->val.node->type == NT_MACRO | |
946 | && !pfile->state.prevent_expansion | |
947 | && !(token->flags & NO_EXPAND)) | |
93c80368 | 948 | { |
29b10746 | 949 | cpp_hashnode *node = token->val.node; |
4c2b647d | 950 | |
a5c3cccd NB |
951 | /* Macros invalidate controlling macros. */ |
952 | pfile->mi_state = MI_FAILED; | |
953 | ||
29b10746 | 954 | if (node->flags & NODE_BUILTIN) |
a5c3cccd NB |
955 | { |
956 | builtin_macro (pfile, token); | |
b7a0a5fa | 957 | pfile->buffer->saved_flags = AVOID_LPASTE; |
a5c3cccd NB |
958 | break; |
959 | } | |
960 | ||
29b10746 NB |
961 | if (node->value.macro->disabled) |
962 | token->flags |= NO_EXPAND; | |
963 | else if (enter_macro_context (pfile, node)) | |
bd969772 NB |
964 | { |
965 | /* Pass AVOID_LPASTE and our PREV_WHITE to next token. */ | |
966 | pfile->buffer->saved_flags = ((token->flags & PREV_WHITE) | |
967 | | AVOID_LPASTE); | |
968 | continue; | |
969 | } | |
93c80368 | 970 | } |
a5c3cccd | 971 | |
fe6c2db9 NB |
972 | /* Don't interpret _Pragma within directives. The standard is |
973 | not clear on this, but to me this makes most sense. */ | |
974 | if (token->val.node != pfile->spec_nodes.n__Pragma | |
975 | || pfile->state.in_directive) | |
93c80368 | 976 | break; |
a5c3cccd | 977 | |
7f2f1a66 NB |
978 | /* Handle it, and loop back for another token. MI is cleared |
979 | since this token came from either the lexer or a macro. */ | |
a5c3cccd | 980 | _cpp_do__Pragma (pfile); |
93c80368 | 981 | } |
93c80368 NB |
982 | |
983 | if (pfile->la_write) | |
984 | save_lookahead_token (pfile, token); | |
985 | } | |
986 | ||
7065e130 NB |
987 | /* Returns true if we're expanding an object-like macro that was |
988 | defined in a system header. Just checks the macro at the top of | |
989 | the stack. Used for diagnostic suppression. */ | |
990 | int | |
991 | cpp_sys_objmacro_p (pfile) | |
992 | cpp_reader *pfile; | |
993 | { | |
994 | cpp_macro *macro = pfile->context->macro; | |
995 | ||
996 | return macro && ! macro->fun_like && macro->syshdr; | |
997 | } | |
998 | ||
93c80368 NB |
999 | /* Read each token in, until EOF. Directives are transparently |
1000 | processed. */ | |
1001 | void | |
8dc4676d | 1002 | cpp_scan_buffer_nooutput (pfile, all_buffers) |
93c80368 | 1003 | cpp_reader *pfile; |
8dc4676d | 1004 | int all_buffers; |
93c80368 NB |
1005 | { |
1006 | cpp_token token; | |
8dc4676d | 1007 | cpp_buffer *buffer = all_buffers ? 0: pfile->buffer->prev; |
93c80368 NB |
1008 | |
1009 | do | |
1010 | do | |
1011 | cpp_get_token (pfile, &token); | |
1012 | while (token.type != CPP_EOF); | |
7463ef45 | 1013 | while (cpp_pop_buffer (pfile) != buffer); |
93c80368 NB |
1014 | } |
1015 | ||
1016 | /* Lookahead handling. */ | |
1017 | ||
1018 | static void | |
1019 | save_lookahead_token (pfile, token) | |
1020 | cpp_reader *pfile; | |
1021 | const cpp_token *token; | |
1022 | { | |
1023 | if (token->type != CPP_EOF) | |
1024 | { | |
1025 | cpp_lookahead *la = pfile->la_write; | |
1026 | cpp_token_with_pos *twp; | |
1027 | ||
1028 | if (la->count == la->cap) | |
711b8824 | 1029 | { |
93c80368 NB |
1030 | la->cap += la->cap + 8; |
1031 | la->tokens = (cpp_token_with_pos *) | |
1032 | xrealloc (la->tokens, la->cap * sizeof (cpp_token_with_pos)); | |
711b8824 | 1033 | } |
93c80368 NB |
1034 | |
1035 | twp = &la->tokens[la->count++]; | |
1036 | twp->token = *token; | |
1037 | twp->pos = *cpp_get_line (pfile); | |
711b8824 | 1038 | } |
711b8824 ZW |
1039 | } |
1040 | ||
93c80368 NB |
1041 | static void |
1042 | take_lookahead_token (pfile, token) | |
711b8824 | 1043 | cpp_reader *pfile; |
93c80368 | 1044 | cpp_token *token; |
711b8824 | 1045 | { |
93c80368 NB |
1046 | cpp_lookahead *la = pfile->la_read; |
1047 | cpp_token_with_pos *twp = &la->tokens[la->cur]; | |
711b8824 | 1048 | |
93c80368 NB |
1049 | *token = twp->token; |
1050 | pfile->lexer_pos = twp->pos; | |
711b8824 | 1051 | |
93c80368 | 1052 | if (++la->cur == la->count) |
b528a07e | 1053 | _cpp_release_lookahead (pfile); |
93c80368 | 1054 | } |
711b8824 | 1055 | |
93c80368 | 1056 | /* Moves the lookahead at the front of the read list to the free store. */ |
b528a07e NB |
1057 | void |
1058 | _cpp_release_lookahead (pfile) | |
93c80368 NB |
1059 | cpp_reader *pfile; |
1060 | { | |
1061 | cpp_lookahead *la = pfile->la_read; | |
711b8824 | 1062 | |
93c80368 NB |
1063 | pfile->la_read = la->next; |
1064 | la->next = pfile->la_unused; | |
1065 | pfile->la_unused = la; | |
1066 | unlock_pools (pfile); | |
1067 | } | |
711b8824 | 1068 | |
93c80368 NB |
1069 | /* Take a new lookahead from the free store, or allocate one if none. */ |
1070 | static cpp_lookahead * | |
1071 | alloc_lookahead (pfile) | |
1072 | cpp_reader *pfile; | |
1073 | { | |
1074 | cpp_lookahead *la = pfile->la_unused; | |
1075 | ||
1076 | if (la) | |
1077 | pfile->la_unused = la->next; | |
1078 | else | |
1079 | { | |
1080 | la = xnew (cpp_lookahead); | |
1081 | la->tokens = 0; | |
1082 | la->cap = 0; | |
1083 | } | |
1084 | ||
1085 | la->cur = la->count = 0; | |
1086 | return la; | |
711b8824 ZW |
1087 | } |
1088 | ||
93c80368 NB |
1089 | /* Free memory associated with a lookahead list. */ |
1090 | static void | |
1091 | free_lookahead (la) | |
1092 | cpp_lookahead *la; | |
711b8824 | 1093 | { |
93c80368 NB |
1094 | if (la->tokens) |
1095 | free ((PTR) la->tokens); | |
1096 | free ((PTR) la); | |
1097 | } | |
711b8824 | 1098 | |
93c80368 NB |
1099 | /* Free all the lookaheads of a cpp_reader. */ |
1100 | void | |
1101 | _cpp_free_lookaheads (pfile) | |
1102 | cpp_reader *pfile; | |
1103 | { | |
1104 | cpp_lookahead *la, *lan; | |
1105 | ||
1106 | if (pfile->la_read) | |
1107 | free_lookahead (pfile->la_read); | |
1108 | if (pfile->la_write) | |
1109 | free_lookahead (pfile->la_write); | |
1110 | ||
1111 | for (la = pfile->la_unused; la; la = lan) | |
1112 | { | |
1113 | lan = la->next; | |
1114 | free_lookahead (la); | |
1115 | } | |
1116 | } | |
711b8824 | 1117 | |
93c80368 NB |
1118 | /* Allocate a lookahead and move it to the front of the write list. */ |
1119 | void | |
1120 | cpp_start_lookahead (pfile) | |
711b8824 | 1121 | cpp_reader *pfile; |
711b8824 | 1122 | { |
93c80368 | 1123 | cpp_lookahead *la = alloc_lookahead (pfile); |
711b8824 | 1124 | |
93c80368 NB |
1125 | la->next = pfile->la_write; |
1126 | pfile->la_write = la; | |
711b8824 | 1127 | |
93c80368 | 1128 | la->pos = *cpp_get_line (pfile); |
711b8824 | 1129 | |
93c80368 NB |
1130 | /* Don't allow memory pools to be re-used whilst we're reading ahead. */ |
1131 | lock_pools (pfile); | |
1132 | } | |
711b8824 | 1133 | |
93c80368 NB |
1134 | /* Stop reading ahead - either step back, or drop the read ahead. */ |
1135 | void | |
1136 | cpp_stop_lookahead (pfile, drop) | |
1137 | cpp_reader *pfile; | |
1138 | int drop; | |
1139 | { | |
1140 | cpp_lookahead *la = pfile->la_write; | |
711b8824 | 1141 | |
93c80368 NB |
1142 | pfile->la_write = la->next; |
1143 | la->next = pfile->la_read; | |
1144 | pfile->la_read = la; | |
711b8824 | 1145 | |
93c80368 | 1146 | if (drop || la->count == 0) |
b528a07e | 1147 | _cpp_release_lookahead (pfile); |
93c80368 NB |
1148 | else |
1149 | pfile->lexer_pos = la->pos; | |
711b8824 ZW |
1150 | } |
1151 | ||
93c80368 NB |
1152 | /* Push a single token back to the front of the queue. Only to be |
1153 | used by cpplib, and only then when necessary. POS is the position | |
1154 | to report for the preceding token. */ | |
1155 | void | |
1156 | _cpp_push_token (pfile, token, pos) | |
1157 | cpp_reader *pfile; | |
1158 | const cpp_token *token; | |
1159 | const cpp_lexer_pos *pos; | |
1160 | { | |
1161 | cpp_start_lookahead (pfile); | |
1162 | save_lookahead_token (pfile, token); | |
1163 | cpp_stop_lookahead (pfile, 0); | |
1164 | pfile->lexer_pos = *pos; | |
1165 | } | |
1166 | ||
1167 | /* #define directive parsing and handling. */ | |
1168 | ||
618cdda7 | 1169 | /* Returns non-zero if a macro redefinition warning is required. */ |
93c80368 | 1170 | static int |
618cdda7 | 1171 | warn_of_redefinition (pfile, node, macro2) |
93c80368 NB |
1172 | cpp_reader *pfile; |
1173 | const cpp_hashnode *node; | |
1174 | const cpp_macro *macro2; | |
1175 | { | |
1176 | const cpp_macro *macro1; | |
1177 | unsigned int i; | |
1178 | ||
618cdda7 NB |
1179 | /* Some redefinitions need to be warned about regardless. */ |
1180 | if (node->flags & NODE_WARN) | |
1181 | return 1; | |
93c80368 | 1182 | |
618cdda7 NB |
1183 | if (! CPP_PEDANTIC (pfile)) |
1184 | return 0; | |
1185 | ||
1186 | /* Redefinition of a macro is allowed if and only if the old and new | |
1187 | definitions are the same. (6.10.3 paragraph 2). */ | |
93c80368 NB |
1188 | macro1 = node->value.macro; |
1189 | ||
1190 | /* The quick failures. */ | |
1191 | if (macro1->count != macro2->count | |
1192 | || macro1->paramc != macro2->paramc | |
1193 | || macro1->fun_like != macro2->fun_like | |
28e0f040 | 1194 | || macro1->variadic != macro2->variadic) |
618cdda7 | 1195 | return 1; |
93c80368 NB |
1196 | |
1197 | /* Check each token. */ | |
1198 | for (i = 0; i < macro1->count; i++) | |
1199 | if (! _cpp_equiv_tokens (¯o1->expansion[i], ¯o2->expansion[i])) | |
618cdda7 | 1200 | return 1; |
93c80368 NB |
1201 | |
1202 | /* Check parameter spellings. */ | |
1203 | for (i = 0; i < macro1->paramc; i++) | |
1204 | if (macro1->params[i] != macro2->params[i]) | |
618cdda7 | 1205 | return 1; |
93c80368 | 1206 | |
618cdda7 | 1207 | return 0; |
93c80368 NB |
1208 | } |
1209 | ||
1210 | /* Free the definition of hashnode H. */ | |
711b8824 ZW |
1211 | |
1212 | void | |
1213 | _cpp_free_definition (h) | |
1214 | cpp_hashnode *h; | |
1215 | { | |
93c80368 NB |
1216 | /* Macros and assertions no longer have anything to free. */ |
1217 | h->type = NT_VOID; | |
1218 | /* Clear builtin flag in case of redefinition. */ | |
1219 | h->flags &= ~NODE_BUILTIN; | |
1220 | } | |
1221 | ||
1222 | static int | |
1223 | save_parameter (pfile, macro, node) | |
1224 | cpp_reader *pfile; | |
1225 | cpp_macro *macro; | |
1226 | cpp_hashnode *node; | |
1227 | { | |
1228 | cpp_hashnode **dest; | |
1229 | ||
1230 | /* Constraint 6.10.3.6 - duplicate parameter names. */ | |
1231 | if (node->arg_index) | |
709e9e50 | 1232 | { |
93c80368 NB |
1233 | cpp_error (pfile, "duplicate macro parameter \"%s\"", node->name); |
1234 | return 1; | |
1235 | } | |
709e9e50 | 1236 | |
93c80368 NB |
1237 | dest = ¯o->params[macro->paramc]; |
1238 | ||
1239 | /* Check we have room for the parameters. */ | |
1240 | if ((unsigned char *) (dest + 1) >= POOL_LIMIT (&pfile->macro_pool)) | |
1241 | { | |
1242 | _cpp_next_chunk (&pfile->macro_pool, sizeof (cpp_hashnode *), | |
1243 | (unsigned char **) ¯o->params); | |
1244 | dest = ¯o->params[macro->paramc]; | |
709e9e50 NB |
1245 | } |
1246 | ||
93c80368 NB |
1247 | *dest = node; |
1248 | node->arg_index = ++macro->paramc; | |
1249 | return 0; | |
711b8824 ZW |
1250 | } |
1251 | ||
93c80368 NB |
1252 | static int |
1253 | parse_params (pfile, macro) | |
711b8824 | 1254 | cpp_reader *pfile; |
93c80368 | 1255 | cpp_macro *macro; |
711b8824 | 1256 | { |
93c80368 NB |
1257 | cpp_token token; |
1258 | unsigned int prev_ident = 0; | |
711b8824 | 1259 | |
93c80368 NB |
1260 | macro->params = (cpp_hashnode **) POOL_FRONT (&pfile->macro_pool); |
1261 | for (;;) | |
711b8824 | 1262 | { |
93c80368 | 1263 | _cpp_lex_token (pfile, &token); |
711b8824 | 1264 | |
93c80368 | 1265 | switch (token.type) |
711b8824 | 1266 | { |
93c80368 NB |
1267 | default: |
1268 | cpp_error (pfile, "\"%s\" may not appear in macro parameter list", | |
1269 | cpp_token_as_text (pfile, &token)); | |
1270 | return 0; | |
1271 | ||
711b8824 | 1272 | case CPP_NAME: |
93c80368 NB |
1273 | if (prev_ident) |
1274 | { | |
1275 | cpp_error (pfile, "macro parameters must be comma-separated"); | |
1276 | return 0; | |
1277 | } | |
1278 | prev_ident = 1; | |
1279 | ||
1280 | if (save_parameter (pfile, macro, token.val.node)) | |
1281 | return 0; | |
1282 | continue; | |
711b8824 | 1283 | |
93c80368 NB |
1284 | case CPP_CLOSE_PAREN: |
1285 | if (prev_ident || macro->paramc == 0) | |
711b8824 | 1286 | break; |
711b8824 | 1287 | |
93c80368 NB |
1288 | /* Fall through to pick up the error. */ |
1289 | case CPP_COMMA: | |
1290 | if (!prev_ident) | |
1291 | { | |
1292 | cpp_error (pfile, "parameter name missing"); | |
1293 | return 0; | |
1294 | } | |
1295 | prev_ident = 0; | |
711b8824 ZW |
1296 | continue; |
1297 | ||
93c80368 | 1298 | case CPP_ELLIPSIS: |
28e0f040 | 1299 | macro->variadic = 1; |
93c80368 NB |
1300 | if (!prev_ident) |
1301 | { | |
1302 | save_parameter (pfile, macro, pfile->spec_nodes.n__VA_ARGS__); | |
1303 | pfile->state.va_args_ok = 1; | |
1304 | if (! CPP_OPTION (pfile, c99) && CPP_OPTION (pfile, pedantic)) | |
1305 | cpp_pedwarn (pfile, | |
28e0f040 | 1306 | "anonymous variadic macros were introduced in C99"); |
93c80368 NB |
1307 | } |
1308 | else if (CPP_OPTION (pfile, pedantic)) | |
28e0f040 | 1309 | cpp_pedwarn (pfile, "ISO C does not permit named variadic macros"); |
711b8824 | 1310 | |
93c80368 NB |
1311 | /* We're at the end, and just expect a closing parenthesis. */ |
1312 | _cpp_lex_token (pfile, &token); | |
1313 | if (token.type == CPP_CLOSE_PAREN) | |
1314 | break; | |
1315 | /* Fall through. */ | |
711b8824 | 1316 | |
93c80368 NB |
1317 | case CPP_EOF: |
1318 | cpp_error (pfile, "missing ')' in macro parameter list"); | |
1319 | return 0; | |
711b8824 ZW |
1320 | } |
1321 | ||
93c80368 NB |
1322 | /* Success. Commit the parameter array. */ |
1323 | POOL_COMMIT (&pfile->macro_pool, | |
1324 | macro->paramc * sizeof (cpp_hashnode *)); | |
1325 | return 1; | |
711b8824 | 1326 | } |
93c80368 NB |
1327 | } |
1328 | ||
1329 | /* Lex a token from a macro's replacement list. Translate it to a | |
1330 | CPP_MACRO_ARG if appropriate. */ | |
1331 | static cpp_token * | |
1332 | lex_expansion_token (pfile, macro) | |
1333 | cpp_reader *pfile; | |
1334 | cpp_macro *macro; | |
1335 | { | |
1336 | cpp_token *token = ¯o->expansion[macro->count]; | |
711b8824 | 1337 | |
93c80368 NB |
1338 | /* Check we have room for the token. */ |
1339 | if ((unsigned char *) (token + 1) >= POOL_LIMIT (&pfile->macro_pool)) | |
711b8824 | 1340 | { |
93c80368 NB |
1341 | _cpp_next_chunk (&pfile->macro_pool, sizeof (cpp_token), |
1342 | (unsigned char **) ¯o->expansion); | |
1343 | token = ¯o->expansion[macro->count]; | |
711b8824 ZW |
1344 | } |
1345 | ||
93c80368 NB |
1346 | macro->count++; |
1347 | _cpp_lex_token (pfile, token); | |
1348 | ||
1349 | /* Is this an argument? */ | |
1350 | if (token->type == CPP_NAME && token->val.node->arg_index) | |
1351 | { | |
1352 | token->type = CPP_MACRO_ARG; | |
6c53ebff | 1353 | token->val.arg_no = token->val.node->arg_index; |
93c80368 NB |
1354 | } |
1355 | else if (CPP_WTRADITIONAL (pfile) && macro->paramc > 0 | |
1356 | && (token->type == CPP_STRING || token->type == CPP_CHAR)) | |
1357 | check_trad_stringification (pfile, macro, &token->val.str); | |
1358 | ||
1359 | return token; | |
711b8824 ZW |
1360 | } |
1361 | ||
1362 | /* Parse a macro and save its expansion. Returns non-zero on success. */ | |
1363 | int | |
93c80368 | 1364 | _cpp_create_definition (pfile, node) |
711b8824 | 1365 | cpp_reader *pfile; |
93c80368 | 1366 | cpp_hashnode *node; |
711b8824 | 1367 | { |
93c80368 NB |
1368 | cpp_macro *macro; |
1369 | cpp_token *token; | |
1370 | unsigned int i, ok = 1; | |
1371 | ||
1372 | macro = (cpp_macro *) _cpp_pool_alloc (&pfile->macro_pool, | |
1373 | sizeof (cpp_macro)); | |
1374 | macro->file = pfile->buffer->nominal_fname; | |
1375 | macro->line = pfile->directive_pos.line; | |
1376 | macro->params = 0; | |
1377 | macro->paramc = 0; | |
1378 | macro->fun_like = 0; | |
28e0f040 | 1379 | macro->variadic = 0; |
93c80368 NB |
1380 | macro->count = 0; |
1381 | macro->expansion = (cpp_token *) POOL_FRONT (&pfile->macro_pool); | |
1382 | ||
1383 | /* Get the first token of the expansion (or the '(' of a | |
1384 | function-like macro). */ | |
1385 | token = lex_expansion_token (pfile, macro); | |
1386 | if (token->type == CPP_OPEN_PAREN && !(token->flags & PREV_WHITE)) | |
1387 | { | |
1388 | if (!(ok = parse_params (pfile, macro))) | |
1389 | goto cleanup; | |
1390 | macro->count = 0; | |
1391 | macro->fun_like = 1; | |
1392 | /* Some of the pool may have been used for the parameter store. */ | |
1393 | macro->expansion = (cpp_token *) POOL_FRONT (&pfile->macro_pool); | |
1394 | token = lex_expansion_token (pfile, macro); | |
1395 | } | |
1396 | else if (token->type != CPP_EOF && !(token->flags & PREV_WHITE)) | |
1397 | cpp_pedwarn (pfile, "ISO C requires whitespace after the macro name"); | |
711b8824 | 1398 | |
93c80368 NB |
1399 | /* Setting it here means we don't catch leading comments. */ |
1400 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
711b8824 | 1401 | |
93c80368 NB |
1402 | for (;;) |
1403 | { | |
1404 | /* Check the stringifying # constraint 6.10.3.2.1 of | |
1405 | function-like macros when lexing the subsequent token. */ | |
1406 | if (macro->count > 1 && token[-1].type == CPP_HASH && macro->fun_like) | |
1407 | { | |
1408 | if (token->type == CPP_MACRO_ARG) | |
1409 | { | |
1410 | token->flags &= ~PREV_WHITE; | |
1411 | token->flags |= STRINGIFY_ARG; | |
1412 | token->flags |= token[-1].flags & PREV_WHITE; | |
1413 | token[-1] = token[0]; | |
1414 | macro->count--; | |
1415 | } | |
1416 | /* Let assembler get away with murder. */ | |
bdb05a7b | 1417 | else if (CPP_OPTION (pfile, lang) != CLK_ASM) |
93c80368 NB |
1418 | { |
1419 | ok = 0; | |
1420 | cpp_error (pfile, "'#' is not followed by a macro parameter"); | |
1421 | goto cleanup; | |
1422 | } | |
1423 | } | |
1424 | ||
1425 | if (token->type == CPP_EOF) | |
1426 | break; | |
1427 | ||
1428 | /* Paste operator constraint 6.10.3.3.1. */ | |
1429 | if (token->type == CPP_PASTE) | |
1430 | { | |
1431 | /* Token-paste ##, can appear in both object-like and | |
1432 | function-like macros, but not at the ends. */ | |
1433 | if (--macro->count > 0) | |
1434 | token = lex_expansion_token (pfile, macro); | |
1435 | ||
1436 | if (macro->count == 0 || token->type == CPP_EOF) | |
1437 | { | |
1438 | ok = 0; | |
1439 | cpp_error (pfile, | |
1440 | "'##' cannot appear at either end of a macro expansion"); | |
1441 | goto cleanup; | |
1442 | } | |
711b8824 | 1443 | |
93c80368 NB |
1444 | token[-1].flags |= PASTE_LEFT; |
1445 | /* Give it a PREV_WHITE for -dM etc. */ | |
1446 | token->flags |= PREV_WHITE; | |
1447 | } | |
1448 | ||
1449 | token = lex_expansion_token (pfile, macro); | |
1450 | } | |
1451 | ||
4c2b647d NB |
1452 | /* Don't count the CPP_EOF. */ |
1453 | macro->count--; | |
93c80368 NB |
1454 | |
1455 | /* Clear the whitespace flag from the leading token. */ | |
1456 | macro->expansion[0].flags &= ~PREV_WHITE; | |
1457 | ||
44ed91a1 NB |
1458 | /* Implement the macro-defined-to-itself optimisation. */ |
1459 | macro->disabled = (macro->count == 1 && !macro->fun_like | |
1460 | && macro->expansion[0].type == CPP_NAME | |
1461 | && macro->expansion[0].val.node == node); | |
1462 | ||
7065e130 NB |
1463 | /* To suppress some diagnostics. */ |
1464 | macro->syshdr = pfile->buffer->sysp != 0; | |
1465 | ||
93c80368 NB |
1466 | /* Commit the memory. */ |
1467 | POOL_COMMIT (&pfile->macro_pool, macro->count * sizeof (cpp_token)); | |
1468 | ||
93c80368 | 1469 | if (node->type != NT_VOID) |
711b8824 | 1470 | { |
618cdda7 | 1471 | if (warn_of_redefinition (pfile, node, macro)) |
711b8824 | 1472 | { |
93c80368 NB |
1473 | cpp_pedwarn_with_line (pfile, pfile->directive_pos.line, |
1474 | pfile->directive_pos.col, | |
1475 | "\"%s\" redefined", node->name); | |
1476 | ||
618cdda7 | 1477 | if (node->type == NT_MACRO && !(node->flags & NODE_BUILTIN)) |
711b8824 | 1478 | cpp_pedwarn_with_file_and_line (pfile, |
93c80368 NB |
1479 | node->value.macro->file, |
1480 | node->value.macro->line, 1, | |
711b8824 ZW |
1481 | "this is the location of the previous definition"); |
1482 | } | |
93c80368 | 1483 | _cpp_free_definition (node); |
711b8824 ZW |
1484 | } |
1485 | ||
1486 | /* Enter definition in hash table. */ | |
93c80368 NB |
1487 | node->type = NT_MACRO; |
1488 | node->value.macro = macro; | |
618cdda7 NB |
1489 | if (! ustrncmp (node->name, DSC ("__STDC_"))) |
1490 | node->flags |= NODE_WARN; | |
711b8824 | 1491 | |
93c80368 NB |
1492 | cleanup: |
1493 | ||
1494 | /* Stop the lexer accepting __VA_ARGS__. */ | |
1495 | pfile->state.va_args_ok = 0; | |
1496 | ||
1497 | /* Clear the fast argument lookup indices. */ | |
1498 | for (i = macro->paramc; i-- > 0; ) | |
1499 | macro->params[i]->arg_index = 0; | |
1500 | ||
1501 | return ok; | |
711b8824 ZW |
1502 | } |
1503 | ||
e1aa5140 KG |
1504 | /* Warn if a token in `string' matches one of the function macro |
1505 | arguments in `info'. This function assumes that the macro is a | |
1506 | function macro and not an object macro. */ | |
1507 | static void | |
93c80368 | 1508 | check_trad_stringification (pfile, macro, string) |
e1aa5140 | 1509 | cpp_reader *pfile; |
93c80368 | 1510 | const cpp_macro *macro; |
e1aa5140 KG |
1511 | const cpp_string *string; |
1512 | { | |
93c80368 | 1513 | unsigned int i, len; |
e1aa5140 KG |
1514 | const U_CHAR *p, *q, *limit = string->text + string->len; |
1515 | ||
1516 | /* Loop over the string. */ | |
1517 | for (p = string->text; p < limit; p = q) | |
1518 | { | |
e1aa5140 | 1519 | /* Find the start of an identifier. */ |
61c16b10 GM |
1520 | while (p < limit && !is_idstart (*p)) |
1521 | p++; | |
e1aa5140 KG |
1522 | |
1523 | /* Find the end of the identifier. */ | |
1524 | q = p; | |
61c16b10 GM |
1525 | while (q < limit && is_idchar (*q)) |
1526 | q++; | |
93c80368 NB |
1527 | |
1528 | len = q - p; | |
1529 | ||
e1aa5140 KG |
1530 | /* Loop over the function macro arguments to see if the |
1531 | identifier inside the string matches one of them. */ | |
93c80368 NB |
1532 | for (i = 0; i < macro->paramc; i++) |
1533 | { | |
1534 | const cpp_hashnode *node = macro->params[i]; | |
e1aa5140 | 1535 | |
93c80368 | 1536 | if (node->length == len && !memcmp (p, node->name, len)) |
e1aa5140 KG |
1537 | { |
1538 | cpp_warning (pfile, | |
93c80368 NB |
1539 | "macro argument \"%s\" would be stringified with -traditional.", |
1540 | node->name); | |
e1aa5140 KG |
1541 | break; |
1542 | } | |
1543 | } | |
1544 | } | |
1545 | } | |
93c80368 NB |
1546 | |
1547 | /* Returns the expansion of a macro, in a format suitable to be read | |
1548 | back in again, and therefore also for DWARF 2 debugging info. | |
1549 | Caller is expected to generate the "#define NAME" bit. The | |
1550 | returned text is temporary, and automatically freed later. */ | |
1551 | ||
1552 | const unsigned char * | |
1553 | cpp_macro_definition (pfile, node) | |
1554 | cpp_reader *pfile; | |
1555 | const cpp_hashnode *node; | |
1556 | { | |
1557 | unsigned int i, len; | |
1558 | const cpp_macro *macro = node->value.macro; | |
1559 | unsigned char *buffer; | |
1560 | ||
1561 | if (node->type != NT_MACRO || (node->flags & NODE_BUILTIN)) | |
1562 | { | |
1563 | cpp_ice (pfile, "invalid hash type %d in dump_definition", node->type); | |
1564 | return 0; | |
1565 | } | |
1566 | ||
1567 | /* Calculate length. */ | |
1568 | len = 1; /* ' ' */ | |
1569 | if (macro->fun_like) | |
1570 | { | |
1571 | len += 3; /* "()" plus possible final "." of ellipsis. */ | |
1572 | for (i = 0; i < macro->paramc; i++) | |
1573 | len += macro->params[i]->length + 2; /* ", " */ | |
1574 | } | |
1575 | ||
4c2b647d | 1576 | for (i = 0; i < macro->count; i++) |
93c80368 | 1577 | { |
4c2b647d | 1578 | cpp_token *token = ¯o->expansion[i]; |
93c80368 | 1579 | |
4c2b647d NB |
1580 | if (token->type == CPP_MACRO_ARG) |
1581 | len += macro->params[token->val.arg_no - 1]->length; | |
1582 | else | |
1583 | len += cpp_token_len (token); /* Includes room for ' '. */ | |
1584 | if (token->flags & STRINGIFY_ARG) | |
1585 | len++; /* "#" */ | |
1586 | if (token->flags & PASTE_LEFT) | |
1587 | len += 3; /* " ##" */ | |
93c80368 NB |
1588 | } |
1589 | ||
1590 | if (len > pfile->macro_buffer_len) | |
4b49c365 AO |
1591 | { |
1592 | pfile->macro_buffer = (U_CHAR *) xrealloc (pfile->macro_buffer, len); | |
1593 | pfile->macro_buffer_len = len; | |
1594 | } | |
93c80368 NB |
1595 | buffer = pfile->macro_buffer; |
1596 | ||
1597 | /* Parameter names. */ | |
1598 | if (macro->fun_like) | |
1599 | { | |
1600 | *buffer++ = '('; | |
1601 | for (i = 0; i < macro->paramc; i++) | |
1602 | { | |
1603 | cpp_hashnode *param = macro->params[i]; | |
1604 | ||
1605 | if (param != pfile->spec_nodes.n__VA_ARGS__) | |
1606 | { | |
1607 | memcpy (buffer, param->name, param->length); | |
1608 | buffer += param->length; | |
1609 | } | |
1610 | ||
1611 | if (i + 1 < macro->paramc) | |
1612 | *buffer++ = ',', *buffer++ = ' '; | |
28e0f040 | 1613 | else if (macro->variadic) |
93c80368 NB |
1614 | *buffer++ = '.', *buffer++ = '.', *buffer++ = '.'; |
1615 | } | |
1616 | *buffer++ = ')'; | |
1617 | } | |
1618 | ||
1619 | /* Expansion tokens. */ | |
4c2b647d | 1620 | if (macro->count) |
93c80368 NB |
1621 | { |
1622 | *buffer++ = ' '; | |
1623 | for (i = 0; i < macro->count; i++) | |
1624 | { | |
1625 | cpp_token *token = ¯o->expansion[i]; | |
1626 | ||
1627 | if (token->flags & PREV_WHITE) | |
1628 | *buffer++ = ' '; | |
1629 | if (token->flags & STRINGIFY_ARG) | |
1630 | *buffer++ = '#'; | |
1631 | ||
1632 | if (token->type == CPP_MACRO_ARG) | |
1633 | { | |
6c53ebff NB |
1634 | len = macro->params[token->val.arg_no - 1]->length; |
1635 | memcpy (buffer, macro->params[token->val.arg_no - 1]->name, len); | |
93c80368 NB |
1636 | buffer += len; |
1637 | } | |
1638 | else | |
1639 | buffer = cpp_spell_token (pfile, token, buffer); | |
1640 | ||
1641 | if (token->flags & PASTE_LEFT) | |
1642 | { | |
1643 | *buffer++ = ' '; | |
1644 | *buffer++ = '#'; | |
1645 | *buffer++ = '#'; | |
1646 | /* Next has PREV_WHITE; see _cpp_create_definition. */ | |
1647 | } | |
1648 | } | |
1649 | } | |
1650 | ||
1651 | *buffer = '\0'; | |
1652 | return pfile->macro_buffer; | |
1653 | } |