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79bd622b | 1 | /* Part of CPP library. (Macro and #define handling.) |
69461e0d | 2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1998, |
e0ff7935 | 3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
7f5f3953 | 4 | 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
69461e0d | 5 | Written by Per Bothner, 1994. |
6 | Based on CCCP program by Paul Rubin, June 1986 | |
7 | Adapted to ANSI C, Richard Stallman, Jan 1987 | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU General Public License as published by the | |
6bc9506f | 11 | Free Software Foundation; either version 3, or (at your option) any |
69461e0d | 12 | later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
6bc9506f | 20 | along with this program; see the file COPYING3. If not see |
21 | <http://www.gnu.org/licenses/>. | |
69461e0d | 22 | |
23 | In other words, you are welcome to use, share and improve this program. | |
24 | You are forbidden to forbid anyone else to use, share and improve | |
25 | what you give them. Help stamp out software-hoarding! */ | |
26 | ||
27 | #include "config.h" | |
28 | #include "system.h" | |
29 | #include "cpplib.h" | |
d856c8a6 | 30 | #include "internal.h" |
69461e0d | 31 | |
79bd622b | 32 | typedef struct macro_arg macro_arg; |
33 | struct macro_arg | |
34 | { | |
f9b5f742 | 35 | const cpp_token **first; /* First token in unexpanded argument. */ |
1e625a2e | 36 | const cpp_token **expanded; /* Macro-expanded argument. */ |
f9b5f742 | 37 | const cpp_token *stringified; /* Stringified argument. */ |
79bd622b | 38 | unsigned int count; /* # of tokens in argument. */ |
39 | unsigned int expanded_count; /* # of tokens in expanded argument. */ | |
69461e0d | 40 | }; |
41 | ||
79bd622b | 42 | /* Macro expansion. */ |
43 | ||
45f9f140 | 44 | static int enter_macro_context (cpp_reader *, cpp_hashnode *, |
45 | const cpp_token *); | |
f7fdd7a1 | 46 | static int builtin_macro (cpp_reader *, cpp_hashnode *); |
f7fdd7a1 | 47 | static void push_ptoken_context (cpp_reader *, cpp_hashnode *, _cpp_buff *, |
48 | const cpp_token **, unsigned int); | |
45f9f140 | 49 | static _cpp_buff *collect_args (cpp_reader *, const cpp_hashnode *, |
50 | _cpp_buff **); | |
f7fdd7a1 | 51 | static cpp_context *next_context (cpp_reader *); |
52 | static const cpp_token *padding_token (cpp_reader *, const cpp_token *); | |
53 | static void expand_arg (cpp_reader *, macro_arg *); | |
54 | static const cpp_token *new_string_token (cpp_reader *, uchar *, unsigned int); | |
55 | static const cpp_token *stringify_arg (cpp_reader *, macro_arg *); | |
56 | static void paste_all_tokens (cpp_reader *, const cpp_token *); | |
57 | static bool paste_tokens (cpp_reader *, const cpp_token **, const cpp_token *); | |
58 | static void replace_args (cpp_reader *, cpp_hashnode *, cpp_macro *, | |
59 | macro_arg *); | |
45f9f140 | 60 | static _cpp_buff *funlike_invocation_p (cpp_reader *, cpp_hashnode *, |
61 | _cpp_buff **); | |
f7fdd7a1 | 62 | static bool create_iso_definition (cpp_reader *, cpp_macro *); |
79bd622b | 63 | |
79bd622b | 64 | /* #define directive parsing and handling. */ |
65 | ||
f7fdd7a1 | 66 | static cpp_token *alloc_expansion_token (cpp_reader *, cpp_macro *); |
67 | static cpp_token *lex_expansion_token (cpp_reader *, cpp_macro *); | |
68 | static bool warn_of_redefinition (cpp_reader *, const cpp_hashnode *, | |
69 | const cpp_macro *); | |
70 | static bool parse_params (cpp_reader *, cpp_macro *); | |
71 | static void check_trad_stringification (cpp_reader *, const cpp_macro *, | |
72 | const cpp_string *); | |
69461e0d | 73 | |
71a7c282 | 74 | /* Emits a warning if NODE is a macro defined in the main file that |
75 | has not been used. */ | |
76 | int | |
f7fdd7a1 | 77 | _cpp_warn_if_unused_macro (cpp_reader *pfile, cpp_hashnode *node, |
78 | void *v ATTRIBUTE_UNUSED) | |
71a7c282 | 79 | { |
80 | if (node->type == NT_MACRO && !(node->flags & NODE_BUILTIN)) | |
81 | { | |
82 | cpp_macro *macro = node->value.macro; | |
83 | ||
84 | if (!macro->used | |
ceec9c13 | 85 | && MAIN_FILE_P (linemap_lookup (pfile->line_table, macro->line))) |
d80d2074 | 86 | cpp_error_with_line (pfile, CPP_DL_WARNING, macro->line, 0, |
71a7c282 | 87 | "macro \"%s\" is not used", NODE_NAME (node)); |
88 | } | |
89 | ||
90 | return 1; | |
91 | } | |
92 | ||
f9b5f742 | 93 | /* Allocates and returns a CPP_STRING token, containing TEXT of length |
94 | LEN, after null-terminating it. TEXT must be in permanent storage. */ | |
95 | static const cpp_token * | |
f7fdd7a1 | 96 | new_string_token (cpp_reader *pfile, unsigned char *text, unsigned int len) |
79bd622b | 97 | { |
f9b5f742 | 98 | cpp_token *token = _cpp_temp_token (pfile); |
79bd622b | 99 | |
f9b5f742 | 100 | text[len] = '\0'; |
79bd622b | 101 | token->type = CPP_STRING; |
f9b5f742 | 102 | token->val.str.len = len; |
103 | token->val.str.text = text; | |
79bd622b | 104 | token->flags = 0; |
f9b5f742 | 105 | return token; |
79bd622b | 106 | } |
107 | ||
79bd622b | 108 | static const char * const monthnames[] = |
109 | { | |
110 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", | |
111 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" | |
112 | }; | |
113 | ||
d6d3c909 | 114 | /* Helper function for builtin_macro. Returns the text generated by |
115 | a builtin macro. */ | |
9c343313 | 116 | const uchar * |
f7fdd7a1 | 117 | _cpp_builtin_macro_text (cpp_reader *pfile, cpp_hashnode *node) |
79bd622b | 118 | { |
610625e3 | 119 | const struct line_map *map; |
9c343313 | 120 | const uchar *result = NULL; |
4999c35b | 121 | linenum_type number = 1; |
c7e5d924 | 122 | |
79bd622b | 123 | switch (node->value.builtin) |
124 | { | |
f9b5f742 | 125 | default: |
d80d2074 | 126 | cpp_error (pfile, CPP_DL_ICE, "invalid built-in macro \"%s\"", |
73328dce | 127 | NODE_NAME (node)); |
9c343313 | 128 | break; |
f9b5f742 | 129 | |
cca5dddc | 130 | case BT_TIMESTAMP: |
131 | { | |
132 | cpp_buffer *pbuffer = cpp_get_buffer (pfile); | |
133 | if (pbuffer->timestamp == NULL) | |
134 | { | |
135 | /* Initialize timestamp value of the assotiated file. */ | |
136 | struct _cpp_file *file = cpp_get_file (pbuffer); | |
137 | if (file) | |
138 | { | |
139 | /* Generate __TIMESTAMP__ string, that represents | |
140 | the date and time of the last modification | |
141 | of the current source file. The string constant | |
142 | looks like "Sun Sep 16 01:03:52 1973". */ | |
143 | struct tm *tb = NULL; | |
144 | struct stat *st = _cpp_get_file_stat (file); | |
145 | if (st) | |
146 | tb = localtime (&st->st_mtime); | |
147 | if (tb) | |
148 | { | |
149 | char *str = asctime (tb); | |
150 | size_t len = strlen (str); | |
151 | unsigned char *buf = _cpp_unaligned_alloc (pfile, len + 2); | |
152 | buf[0] = '"'; | |
153 | strcpy ((char *) buf + 1, str); | |
154 | buf[len] = '"'; | |
155 | pbuffer->timestamp = buf; | |
156 | } | |
157 | else | |
158 | { | |
159 | cpp_errno (pfile, CPP_DL_WARNING, | |
160 | "could not determine file timestamp"); | |
924bbf02 | 161 | pbuffer->timestamp = UC"\"??? ??? ?? ??:??:?? ????\""; |
cca5dddc | 162 | } |
163 | } | |
164 | } | |
165 | result = pbuffer->timestamp; | |
166 | } | |
167 | break; | |
79bd622b | 168 | case BT_FILE: |
169 | case BT_BASE_FILE: | |
69461e0d | 170 | { |
f9b5f742 | 171 | unsigned int len; |
6cee4464 | 172 | const char *name; |
b6d18b0a | 173 | uchar *buf; |
dbddc569 | 174 | map = linemap_lookup (pfile->line_table, pfile->line_table->highest_line); |
6cee4464 | 175 | |
176 | if (node->value.builtin == BT_BASE_FILE) | |
5a9f87bb | 177 | while (! MAIN_FILE_P (map)) |
ceec9c13 | 178 | map = INCLUDED_FROM (pfile->line_table, map); |
6cee4464 | 179 | |
5a9f87bb | 180 | name = map->to_file; |
f9b5f742 | 181 | len = strlen (name); |
cc9012f7 | 182 | buf = _cpp_unaligned_alloc (pfile, len * 2 + 3); |
9c343313 | 183 | result = buf; |
184 | *buf = '"'; | |
185 | buf = cpp_quote_string (buf + 1, (const unsigned char *) name, len); | |
186 | *buf++ = '"'; | |
187 | *buf = '\0'; | |
69461e0d | 188 | } |
c7e5d924 | 189 | break; |
190 | ||
79bd622b | 191 | case BT_INCLUDE_LEVEL: |
4087823d | 192 | /* The line map depth counts the primary source as level 1, but |
193 | historically __INCLUDE_DEPTH__ has called the primary source | |
194 | level 0. */ | |
ceec9c13 | 195 | number = pfile->line_table->depth - 1; |
c7e5d924 | 196 | break; |
79bd622b | 197 | |
198 | case BT_SPECLINE: | |
dbddc569 | 199 | map = &pfile->line_table->maps[pfile->line_table->used-1]; |
79bd622b | 200 | /* If __LINE__ is embedded in a macro, it must expand to the |
201 | line of the macro's invocation, not its definition. | |
202 | Otherwise things like assert() will not work properly. */ | |
4999c35b | 203 | number = SOURCE_LINE (map, |
204 | CPP_OPTION (pfile, traditional) | |
205 | ? pfile->line_table->highest_line | |
206 | : pfile->cur_token[-1].src_loc); | |
c7e5d924 | 207 | break; |
79bd622b | 208 | |
63994318 | 209 | /* __STDC__ has the value 1 under normal circumstances. |
210 | However, if (a) we are in a system header, (b) the option | |
965e9876 | 211 | stdc_0_in_system_headers is true (set by target config), and |
212 | (c) we are not in strictly conforming mode, then it has the | |
31614f7c | 213 | value 0. (b) and (c) are already checked in cpp_init_builtins. */ |
79bd622b | 214 | case BT_STDC: |
31614f7c | 215 | if (cpp_in_system_header (pfile)) |
216 | number = 0; | |
217 | else | |
218 | number = 1; | |
c7e5d924 | 219 | break; |
69461e0d | 220 | |
79bd622b | 221 | case BT_DATE: |
222 | case BT_TIME: | |
9c343313 | 223 | if (pfile->date == NULL) |
79bd622b | 224 | { |
f9b5f742 | 225 | /* Allocate __DATE__ and __TIME__ strings from permanent |
226 | storage. We only do this once, and don't generate them | |
227 | at init time, because time() and localtime() are very | |
228 | slow on some systems. */ | |
3385506f | 229 | time_t tt; |
230 | struct tm *tb = NULL; | |
231 | ||
232 | /* (time_t) -1 is a legitimate value for "number of seconds | |
233 | since the Epoch", so we have to do a little dance to | |
234 | distinguish that from a genuine error. */ | |
235 | errno = 0; | |
236 | tt = time(NULL); | |
237 | if (tt != (time_t)-1 || errno == 0) | |
238 | tb = localtime (&tt); | |
239 | ||
240 | if (tb) | |
241 | { | |
242 | pfile->date = _cpp_unaligned_alloc (pfile, | |
243 | sizeof ("\"Oct 11 1347\"")); | |
244 | sprintf ((char *) pfile->date, "\"%s %2d %4d\"", | |
f7fdd7a1 | 245 | monthnames[tb->tm_mon], tb->tm_mday, |
246 | tb->tm_year + 1900); | |
3385506f | 247 | |
248 | pfile->time = _cpp_unaligned_alloc (pfile, | |
249 | sizeof ("\"12:34:56\"")); | |
250 | sprintf ((char *) pfile->time, "\"%02d:%02d:%02d\"", | |
251 | tb->tm_hour, tb->tm_min, tb->tm_sec); | |
252 | } | |
253 | else | |
254 | { | |
d80d2074 | 255 | cpp_errno (pfile, CPP_DL_WARNING, |
3385506f | 256 | "could not determine date and time"); |
257 | ||
924bbf02 | 258 | pfile->date = UC"\"??? ?? ????\""; |
259 | pfile->time = UC"\"??:??:??\""; | |
3385506f | 260 | } |
79bd622b | 261 | } |
79bd622b | 262 | |
c7e5d924 | 263 | if (node->value.builtin == BT_DATE) |
9c343313 | 264 | result = pfile->date; |
c7e5d924 | 265 | else |
9c343313 | 266 | result = pfile->time; |
c7e5d924 | 267 | break; |
ce079f70 | 268 | |
269 | case BT_COUNTER: | |
fcde64dc | 270 | if (CPP_OPTION (pfile, directives_only) && pfile->state.in_directive) |
271 | cpp_error (pfile, CPP_DL_ERROR, | |
272 | "__COUNTER__ expanded inside directive with -fdirectives-only"); | |
ce079f70 | 273 | number = pfile->counter++; |
274 | break; | |
9c343313 | 275 | } |
276 | ||
277 | if (result == NULL) | |
278 | { | |
279 | /* 21 bytes holds all NUL-terminated unsigned 64-bit numbers. */ | |
280 | result = _cpp_unaligned_alloc (pfile, 21); | |
281 | sprintf ((char *) result, "%u", number); | |
282 | } | |
283 | ||
284 | return result; | |
285 | } | |
286 | ||
287 | /* Convert builtin macros like __FILE__ to a token and push it on the | |
d6d3c909 | 288 | context stack. Also handles _Pragma, for which a new token may not |
289 | be created. Returns 1 if it generates a new token context, 0 to | |
9c343313 | 290 | return the token to the caller. */ |
291 | static int | |
f7fdd7a1 | 292 | builtin_macro (cpp_reader *pfile, cpp_hashnode *node) |
9c343313 | 293 | { |
294 | const uchar *buf; | |
a54e0bf8 | 295 | size_t len; |
296 | char *nbuf; | |
c7e5d924 | 297 | |
9c343313 | 298 | if (node->value.builtin == BT_PRAGMA) |
299 | { | |
c7e5d924 | 300 | /* Don't interpret _Pragma within directives. The standard is |
301 | not clear on this, but to me this makes most sense. */ | |
302 | if (pfile->state.in_directive) | |
303 | return 0; | |
304 | ||
2d507e67 | 305 | return _cpp_do__Pragma (pfile); |
79bd622b | 306 | } |
c7e5d924 | 307 | |
9c343313 | 308 | buf = _cpp_builtin_macro_text (pfile, node); |
a54e0bf8 | 309 | len = ustrlen (buf); |
720aca92 | 310 | nbuf = (char *) alloca (len + 1); |
a54e0bf8 | 311 | memcpy (nbuf, buf, len); |
312 | nbuf[len]='\n'; | |
9c343313 | 313 | |
9eb74666 | 314 | cpp_push_buffer (pfile, (uchar *) nbuf, len, /* from_stage3 */ true); |
a54e0bf8 | 315 | _cpp_clean_line (pfile); |
9c343313 | 316 | |
317 | /* Set pfile->cur_token as required by _cpp_lex_direct. */ | |
318 | pfile->cur_token = _cpp_temp_token (pfile); | |
b75b98aa | 319 | _cpp_push_token_context (pfile, NULL, _cpp_lex_direct (pfile), 1); |
9c343313 | 320 | if (pfile->buffer->cur != pfile->buffer->rlimit) |
d80d2074 | 321 | cpp_error (pfile, CPP_DL_ICE, "invalid built-in macro \"%s\"", |
9c343313 | 322 | NODE_NAME (node)); |
323 | _cpp_pop_buffer (pfile); | |
324 | ||
c7e5d924 | 325 | return 1; |
69461e0d | 326 | } |
327 | ||
88cf66fa | 328 | /* Copies SRC, of length LEN, to DEST, adding backslashes before all |
cc9012f7 | 329 | backslashes and double quotes. DEST must be of sufficient size. |
330 | Returns a pointer to the end of the string. */ | |
b6d18b0a | 331 | uchar * |
f7fdd7a1 | 332 | cpp_quote_string (uchar *dest, const uchar *src, unsigned int len) |
79bd622b | 333 | { |
334 | while (len--) | |
335 | { | |
b6d18b0a | 336 | uchar c = *src++; |
69461e0d | 337 | |
79bd622b | 338 | if (c == '\\' || c == '"') |
339 | { | |
340 | *dest++ = '\\'; | |
341 | *dest++ = c; | |
342 | } | |
343 | else | |
cc9012f7 | 344 | *dest++ = c; |
79bd622b | 345 | } |
69461e0d | 346 | |
79bd622b | 347 | return dest; |
348 | } | |
69461e0d | 349 | |
88cf66fa | 350 | /* Convert a token sequence ARG to a single string token according to |
351 | the rules of the ISO C #-operator. */ | |
f9b5f742 | 352 | static const cpp_token * |
f7fdd7a1 | 353 | stringify_arg (cpp_reader *pfile, macro_arg *arg) |
79bd622b | 354 | { |
4970d4c2 | 355 | unsigned char *dest; |
1fdf6039 | 356 | unsigned int i, escape_it, backslash_count = 0; |
f9b5f742 | 357 | const cpp_token *source = NULL; |
1fdf6039 | 358 | size_t len; |
69461e0d | 359 | |
4970d4c2 | 360 | if (BUFF_ROOM (pfile->u_buff) < 3) |
361 | _cpp_extend_buff (pfile, &pfile->u_buff, 3); | |
362 | dest = BUFF_FRONT (pfile->u_buff); | |
363 | *dest++ = '"'; | |
364 | ||
79bd622b | 365 | /* Loop, reading in the argument's tokens. */ |
366 | for (i = 0; i < arg->count; i++) | |
367 | { | |
f9b5f742 | 368 | const cpp_token *token = arg->first[i]; |
f9b5f742 | 369 | |
370 | if (token->type == CPP_PADDING) | |
371 | { | |
e21164ef | 372 | if (source == NULL |
373 | || (!(source->flags & PREV_WHITE) | |
374 | && token->val.source == NULL)) | |
f9b5f742 | 375 | source = token->val.source; |
376 | continue; | |
377 | } | |
69461e0d | 378 | |
924bbf02 | 379 | escape_it = (token->type == CPP_STRING || token->type == CPP_CHAR |
380 | || token->type == CPP_WSTRING || token->type == CPP_STRING | |
381 | || token->type == CPP_STRING32 || token->type == CPP_CHAR32 | |
382 | || token->type == CPP_STRING16 || token->type == CPP_CHAR16); | |
69461e0d | 383 | |
1fdf6039 | 384 | /* Room for each char being written in octal, initial space and |
4970d4c2 | 385 | final quote and NUL. */ |
f9b5f742 | 386 | len = cpp_token_len (token); |
79bd622b | 387 | if (escape_it) |
79bd622b | 388 | len *= 4; |
4970d4c2 | 389 | len += 3; |
69461e0d | 390 | |
1fdf6039 | 391 | if ((size_t) (BUFF_LIMIT (pfile->u_buff) - dest) < len) |
79bd622b | 392 | { |
1fdf6039 | 393 | size_t len_so_far = dest - BUFF_FRONT (pfile->u_buff); |
e6a5f963 | 394 | _cpp_extend_buff (pfile, &pfile->u_buff, len); |
1fdf6039 | 395 | dest = BUFF_FRONT (pfile->u_buff) + len_so_far; |
79bd622b | 396 | } |
69461e0d | 397 | |
f9b5f742 | 398 | /* Leading white space? */ |
4970d4c2 | 399 | if (dest - 1 != BUFF_FRONT (pfile->u_buff)) |
f9b5f742 | 400 | { |
401 | if (source == NULL) | |
402 | source = token; | |
403 | if (source->flags & PREV_WHITE) | |
404 | *dest++ = ' '; | |
405 | } | |
406 | source = NULL; | |
69461e0d | 407 | |
79bd622b | 408 | if (escape_it) |
409 | { | |
1fdf6039 | 410 | _cpp_buff *buff = _cpp_get_buff (pfile, len); |
411 | unsigned char *buf = BUFF_FRONT (buff); | |
bb1fa6bb | 412 | len = cpp_spell_token (pfile, token, buf, true) - buf; |
25266990 | 413 | dest = cpp_quote_string (dest, buf, len); |
1fdf6039 | 414 | _cpp_release_buff (pfile, buff); |
79bd622b | 415 | } |
416 | else | |
bb1fa6bb | 417 | dest = cpp_spell_token (pfile, token, dest, true); |
79bd622b | 418 | |
bc205914 | 419 | if (token->type == CPP_OTHER && token->val.str.text[0] == '\\') |
79bd622b | 420 | backslash_count++; |
421 | else | |
422 | backslash_count = 0; | |
423 | } | |
424 | ||
425 | /* Ignore the final \ of invalid string literals. */ | |
426 | if (backslash_count & 1) | |
427 | { | |
d80d2074 | 428 | cpp_error (pfile, CPP_DL_WARNING, |
73328dce | 429 | "invalid string literal, ignoring final '\\'"); |
1fdf6039 | 430 | dest--; |
79bd622b | 431 | } |
432 | ||
f9b5f742 | 433 | /* Commit the memory, including NUL, and return the token. */ |
4970d4c2 | 434 | *dest++ = '"'; |
1fdf6039 | 435 | len = dest - BUFF_FRONT (pfile->u_buff); |
436 | BUFF_FRONT (pfile->u_buff) = dest + 1; | |
437 | return new_string_token (pfile, dest - len, len); | |
79bd622b | 438 | } |
439 | ||
d10cfa8d | 440 | /* Try to paste two tokens. On success, return nonzero. In any |
1785b647 | 441 | case, PLHS is updated to point to the pasted token, which is |
442 | guaranteed to not have the PASTE_LEFT flag set. */ | |
443 | static bool | |
f7fdd7a1 | 444 | paste_tokens (cpp_reader *pfile, const cpp_token **plhs, const cpp_token *rhs) |
08138c65 | 445 | { |
46139d3f | 446 | unsigned char *buf, *end, *lhsend; |
3127c357 | 447 | cpp_token *lhs; |
1785b647 | 448 | unsigned int len; |
1785b647 | 449 | |
3127c357 | 450 | len = cpp_token_len (*plhs) + cpp_token_len (rhs) + 1; |
720aca92 | 451 | buf = (unsigned char *) alloca (len); |
3127c357 | 452 | end = lhsend = cpp_spell_token (pfile, *plhs, buf, false); |
1785b647 | 453 | |
454 | /* Avoid comment headers, since they are still processed in stage 3. | |
455 | It is simpler to insert a space here, rather than modifying the | |
456 | lexer to ignore comments in some circumstances. Simply returning | |
457 | false doesn't work, since we want to clear the PASTE_LEFT flag. */ | |
3127c357 | 458 | if ((*plhs)->type == CPP_DIV && rhs->type != CPP_EQ) |
1785b647 | 459 | *end++ = ' '; |
1991d8eb | 460 | /* In one obscure case we might see padding here. */ |
461 | if (rhs->type != CPP_PADDING) | |
462 | end = cpp_spell_token (pfile, rhs, end, false); | |
a54e0bf8 | 463 | *end = '\n'; |
1785b647 | 464 | |
9eb74666 | 465 | cpp_push_buffer (pfile, buf, end - buf, /* from_stage3 */ true); |
a54e0bf8 | 466 | _cpp_clean_line (pfile); |
1785b647 | 467 | |
468 | /* Set pfile->cur_token as required by _cpp_lex_direct. */ | |
469 | pfile->cur_token = _cpp_temp_token (pfile); | |
3127c357 | 470 | lhs = _cpp_lex_direct (pfile); |
46139d3f | 471 | if (pfile->buffer->cur != pfile->buffer->rlimit) |
472 | { | |
3127c357 | 473 | source_location saved_loc = lhs->src_loc; |
474 | ||
46139d3f | 475 | _cpp_pop_buffer (pfile); |
476 | _cpp_backup_tokens (pfile, 1); | |
477 | *lhsend = '\0'; | |
478 | ||
3127c357 | 479 | /* We have to remove the PASTE_LEFT flag from the old lhs, but |
480 | we want to keep the new location. */ | |
481 | *lhs = **plhs; | |
482 | *plhs = lhs; | |
483 | lhs->src_loc = saved_loc; | |
484 | lhs->flags &= ~PASTE_LEFT; | |
485 | ||
46139d3f | 486 | /* Mandatory error for all apart from assembler. */ |
487 | if (CPP_OPTION (pfile, lang) != CLK_ASM) | |
488 | cpp_error (pfile, CPP_DL_ERROR, | |
489 | "pasting \"%s\" and \"%s\" does not give a valid preprocessing token", | |
490 | buf, cpp_token_as_text (pfile, rhs)); | |
491 | return false; | |
492 | } | |
1785b647 | 493 | |
3127c357 | 494 | *plhs = lhs; |
46139d3f | 495 | _cpp_pop_buffer (pfile); |
496 | return true; | |
08138c65 | 497 | } |
498 | ||
88cf66fa | 499 | /* Handles an arbitrarily long sequence of ## operators, with initial |
500 | operand LHS. This implementation is left-associative, | |
501 | non-recursive, and finishes a paste before handling succeeding | |
502 | ones. If a paste fails, we back up to the RHS of the failing ## | |
503 | operator before pushing the context containing the result of prior | |
504 | successful pastes, with the effect that the RHS appears in the | |
505 | output stream after the pasted LHS normally. */ | |
79bd622b | 506 | static void |
f7fdd7a1 | 507 | paste_all_tokens (cpp_reader *pfile, const cpp_token *lhs) |
79bd622b | 508 | { |
f9b5f742 | 509 | const cpp_token *rhs; |
510 | cpp_context *context = pfile->context; | |
511 | ||
79bd622b | 512 | do |
513 | { | |
514 | /* Take the token directly from the current context. We can do | |
515 | this, because we are in the replacement list of either an | |
516 | object-like macro, or a function-like macro with arguments | |
517 | inserted. In either case, the constraints to #define | |
08138c65 | 518 | guarantee we have at least one more token. */ |
f9b5f742 | 519 | if (context->direct_p) |
a854276a | 520 | rhs = FIRST (context).token++; |
f9b5f742 | 521 | else |
a854276a | 522 | rhs = *FIRST (context).ptoken++; |
f9b5f742 | 523 | |
524 | if (rhs->type == CPP_PADDING) | |
1991d8eb | 525 | { |
526 | if (rhs->flags & PASTE_LEFT) | |
527 | abort (); | |
528 | } | |
1785b647 | 529 | if (!paste_tokens (pfile, &lhs, rhs)) |
46139d3f | 530 | break; |
79bd622b | 531 | } |
532 | while (rhs->flags & PASTE_LEFT); | |
533 | ||
1785b647 | 534 | /* Put the resulting token in its own context. */ |
b75b98aa | 535 | _cpp_push_token_context (pfile, NULL, lhs, 1); |
79bd622b | 536 | } |
537 | ||
06025647 | 538 | /* Returns TRUE if the number of arguments ARGC supplied in an |
539 | invocation of the MACRO referenced by NODE is valid. An empty | |
540 | invocation to a macro with no parameters should pass ARGC as zero. | |
541 | ||
542 | Note that MACRO cannot necessarily be deduced from NODE, in case | |
543 | NODE was redefined whilst collecting arguments. */ | |
544 | bool | |
f7fdd7a1 | 545 | _cpp_arguments_ok (cpp_reader *pfile, cpp_macro *macro, const cpp_hashnode *node, unsigned int argc) |
06025647 | 546 | { |
547 | if (argc == macro->paramc) | |
548 | return true; | |
549 | ||
550 | if (argc < macro->paramc) | |
551 | { | |
552 | /* As an extension, a rest argument is allowed to not appear in | |
553 | the invocation at all. | |
554 | e.g. #define debug(format, args...) something | |
555 | debug("string"); | |
556 | ||
557 | This is exactly the same as if there had been an empty rest | |
558 | argument - debug("string", ). */ | |
559 | ||
560 | if (argc + 1 == macro->paramc && macro->variadic) | |
561 | { | |
562 | if (CPP_PEDANTIC (pfile) && ! macro->syshdr) | |
d80d2074 | 563 | cpp_error (pfile, CPP_DL_PEDWARN, |
06025647 | 564 | "ISO C99 requires rest arguments to be used"); |
565 | return true; | |
566 | } | |
567 | ||
d80d2074 | 568 | cpp_error (pfile, CPP_DL_ERROR, |
06025647 | 569 | "macro \"%s\" requires %u arguments, but only %u given", |
570 | NODE_NAME (node), macro->paramc, argc); | |
571 | } | |
572 | else | |
d80d2074 | 573 | cpp_error (pfile, CPP_DL_ERROR, |
06025647 | 574 | "macro \"%s\" passed %u arguments, but takes just %u", |
575 | NODE_NAME (node), argc, macro->paramc); | |
576 | ||
577 | return false; | |
578 | } | |
579 | ||
88cf66fa | 580 | /* Reads and returns the arguments to a function-like macro |
581 | invocation. Assumes the opening parenthesis has been processed. | |
582 | If there is an error, emits an appropriate diagnostic and returns | |
583 | NULL. Each argument is terminated by a CPP_EOF token, for the | |
45f9f140 | 584 | future benefit of expand_arg(). If there are any deferred |
585 | #pragma directives among macro arguments, store pointers to the | |
586 | CPP_PRAGMA ... CPP_PRAGMA_EOL tokens into *PRAGMA_BUFF buffer. */ | |
06c92cbc | 587 | static _cpp_buff * |
45f9f140 | 588 | collect_args (cpp_reader *pfile, const cpp_hashnode *node, |
589 | _cpp_buff **pragma_buff) | |
79bd622b | 590 | { |
06c92cbc | 591 | _cpp_buff *buff, *base_buff; |
592 | cpp_macro *macro; | |
593 | macro_arg *args, *arg; | |
594 | const cpp_token *token; | |
595 | unsigned int argc; | |
06c92cbc | 596 | |
597 | macro = node->value.macro; | |
598 | if (macro->paramc) | |
599 | argc = macro->paramc; | |
600 | else | |
601 | argc = 1; | |
602 | buff = _cpp_get_buff (pfile, argc * (50 * sizeof (cpp_token *) | |
603 | + sizeof (macro_arg))); | |
604 | base_buff = buff; | |
605 | args = (macro_arg *) buff->base; | |
606 | memset (args, 0, argc * sizeof (macro_arg)); | |
1fdf6039 | 607 | buff->cur = (unsigned char *) &args[argc]; |
06c92cbc | 608 | arg = args, argc = 0; |
609 | ||
610 | /* Collect the tokens making up each argument. We don't yet know | |
611 | how many arguments have been supplied, whether too many or too | |
612 | few. Hence the slightly bizarre usage of "argc" and "arg". */ | |
613 | do | |
79bd622b | 614 | { |
06c92cbc | 615 | unsigned int paren_depth = 0; |
616 | unsigned int ntokens = 0; | |
79bd622b | 617 | |
06c92cbc | 618 | argc++; |
619 | arg->first = (const cpp_token **) buff->cur; | |
69461e0d | 620 | |
06c92cbc | 621 | for (;;) |
622 | { | |
623 | /* Require space for 2 new tokens (including a CPP_EOF). */ | |
1fdf6039 | 624 | if ((unsigned char *) &arg->first[ntokens + 2] > buff->limit) |
06c92cbc | 625 | { |
e6a5f963 | 626 | buff = _cpp_append_extend_buff (pfile, buff, |
627 | 1000 * sizeof (cpp_token *)); | |
06c92cbc | 628 | arg->first = (const cpp_token **) buff->cur; |
629 | } | |
f9b5f742 | 630 | |
06c92cbc | 631 | token = cpp_get_token (pfile); |
69461e0d | 632 | |
06c92cbc | 633 | if (token->type == CPP_PADDING) |
634 | { | |
635 | /* Drop leading padding. */ | |
636 | if (ntokens == 0) | |
637 | continue; | |
638 | } | |
639 | else if (token->type == CPP_OPEN_PAREN) | |
640 | paren_depth++; | |
641 | else if (token->type == CPP_CLOSE_PAREN) | |
642 | { | |
643 | if (paren_depth-- == 0) | |
644 | break; | |
645 | } | |
646 | else if (token->type == CPP_COMMA) | |
647 | { | |
648 | /* A comma does not terminate an argument within | |
649 | parentheses or as part of a variable argument. */ | |
650 | if (paren_depth == 0 | |
651 | && ! (macro->variadic && argc == macro->paramc)) | |
652 | break; | |
653 | } | |
654 | else if (token->type == CPP_EOF | |
655 | || (token->type == CPP_HASH && token->flags & BOL)) | |
656 | break; | |
45f9f140 | 657 | else if (token->type == CPP_PRAGMA) |
658 | { | |
659 | cpp_token *newtok = _cpp_temp_token (pfile); | |
660 | ||
661 | /* CPP_PRAGMA token lives in directive_result, which will | |
662 | be overwritten on the next directive. */ | |
663 | *newtok = *token; | |
664 | token = newtok; | |
665 | do | |
666 | { | |
667 | if (*pragma_buff == NULL | |
668 | || BUFF_ROOM (*pragma_buff) < sizeof (cpp_token *)) | |
669 | { | |
670 | _cpp_buff *next; | |
671 | if (*pragma_buff == NULL) | |
672 | *pragma_buff | |
673 | = _cpp_get_buff (pfile, 32 * sizeof (cpp_token *)); | |
674 | else | |
675 | { | |
676 | next = *pragma_buff; | |
677 | *pragma_buff | |
678 | = _cpp_get_buff (pfile, | |
679 | (BUFF_FRONT (*pragma_buff) | |
680 | - (*pragma_buff)->base) * 2); | |
681 | (*pragma_buff)->next = next; | |
682 | } | |
683 | } | |
684 | *(const cpp_token **) BUFF_FRONT (*pragma_buff) = token; | |
685 | BUFF_FRONT (*pragma_buff) += sizeof (cpp_token *); | |
686 | if (token->type == CPP_PRAGMA_EOL) | |
687 | break; | |
688 | token = cpp_get_token (pfile); | |
689 | } | |
690 | while (token->type != CPP_EOF); | |
691 | ||
692 | /* In deferred pragmas parsing_args and prevent_expansion | |
693 | had been changed, reset it. */ | |
694 | pfile->state.parsing_args = 2; | |
695 | pfile->state.prevent_expansion = 1; | |
696 | ||
697 | if (token->type == CPP_EOF) | |
698 | break; | |
699 | else | |
700 | continue; | |
701 | } | |
79bd622b | 702 | |
06c92cbc | 703 | arg->first[ntokens++] = token; |
704 | } | |
79bd622b | 705 | |
06c92cbc | 706 | /* Drop trailing padding. */ |
707 | while (ntokens > 0 && arg->first[ntokens - 1]->type == CPP_PADDING) | |
708 | ntokens--; | |
79bd622b | 709 | |
06c92cbc | 710 | arg->count = ntokens; |
711 | arg->first[ntokens] = &pfile->eof; | |
79bd622b | 712 | |
06c92cbc | 713 | /* Terminate the argument. Excess arguments loop back and |
714 | overwrite the final legitimate argument, before failing. */ | |
715 | if (argc <= macro->paramc) | |
716 | { | |
1fdf6039 | 717 | buff->cur = (unsigned char *) &arg->first[ntokens + 1]; |
06c92cbc | 718 | if (argc != macro->paramc) |
719 | arg++; | |
720 | } | |
79bd622b | 721 | } |
d6af0368 | 722 | while (token->type != CPP_CLOSE_PAREN && token->type != CPP_EOF); |
79bd622b | 723 | |
d6af0368 | 724 | if (token->type == CPP_EOF) |
79bd622b | 725 | { |
1fdf6039 | 726 | /* We still need the CPP_EOF to end directives, and to end |
727 | pre-expansion of a macro argument. Step back is not | |
728 | unconditional, since we don't want to return a CPP_EOF to our | |
729 | callers at the end of an -include-d file. */ | |
d6af0368 | 730 | if (pfile->context->prev || pfile->state.in_directive) |
06c92cbc | 731 | _cpp_backup_tokens (pfile, 1); |
d80d2074 | 732 | cpp_error (pfile, CPP_DL_ERROR, |
73328dce | 733 | "unterminated argument list invoking macro \"%s\"", |
c86dbc5b | 734 | NODE_NAME (node)); |
79bd622b | 735 | } |
06025647 | 736 | else |
79bd622b | 737 | { |
06025647 | 738 | /* A single empty argument is counted as no argument. */ |
739 | if (argc == 1 && macro->paramc == 0 && args[0].count == 0) | |
740 | argc = 0; | |
741 | if (_cpp_arguments_ok (pfile, macro, node, argc)) | |
ed909a09 | 742 | { |
743 | /* GCC has special semantics for , ## b where b is a varargs | |
744 | parameter: we remove the comma if b was omitted entirely. | |
745 | If b was merely an empty argument, the comma is retained. | |
746 | If the macro takes just one (varargs) parameter, then we | |
747 | retain the comma only if we are standards conforming. | |
748 | ||
749 | If FIRST is NULL replace_args () swallows the comma. */ | |
750 | if (macro->variadic && (argc < macro->paramc | |
751 | || (argc == 1 && args[0].count == 0 | |
752 | && !CPP_OPTION (pfile, std)))) | |
753 | args[macro->paramc - 1].first = NULL; | |
754 | return base_buff; | |
755 | } | |
79bd622b | 756 | } |
757 | ||
06025647 | 758 | /* An error occurred. */ |
06c92cbc | 759 | _cpp_release_buff (pfile, base_buff); |
760 | return NULL; | |
79bd622b | 761 | } |
762 | ||
2b0e25fe | 763 | /* Search for an opening parenthesis to the macro of NODE, in such a |
764 | way that, if none is found, we don't lose the information in any | |
765 | intervening padding tokens. If we find the parenthesis, collect | |
45f9f140 | 766 | the arguments and return the buffer containing them. PRAGMA_BUFF |
767 | argument is the same as in collect_args. */ | |
2b0e25fe | 768 | static _cpp_buff * |
45f9f140 | 769 | funlike_invocation_p (cpp_reader *pfile, cpp_hashnode *node, |
770 | _cpp_buff **pragma_buff) | |
79bd622b | 771 | { |
2b0e25fe | 772 | const cpp_token *token, *padding = NULL; |
f9b5f742 | 773 | |
2b0e25fe | 774 | for (;;) |
fb5ab82c | 775 | { |
2b0e25fe | 776 | token = cpp_get_token (pfile); |
777 | if (token->type != CPP_PADDING) | |
778 | break; | |
779 | if (padding == NULL | |
780 | || (!(padding->flags & PREV_WHITE) && token->val.source == NULL)) | |
781 | padding = token; | |
fb5ab82c | 782 | } |
79bd622b | 783 | |
2b0e25fe | 784 | if (token->type == CPP_OPEN_PAREN) |
79bd622b | 785 | { |
2b0e25fe | 786 | pfile->state.parsing_args = 2; |
45f9f140 | 787 | return collect_args (pfile, node, pragma_buff); |
79bd622b | 788 | } |
789 | ||
7e2fc40e | 790 | /* CPP_EOF can be the end of macro arguments, or the end of the |
791 | file. We mustn't back up over the latter. Ugh. */ | |
792 | if (token->type != CPP_EOF || token == &pfile->eof) | |
793 | { | |
794 | /* Back up. We may have skipped padding, in which case backing | |
795 | up more than one token when expanding macros is in general | |
796 | too difficult. We re-insert it in its own context. */ | |
797 | _cpp_backup_tokens (pfile, 1); | |
798 | if (padding) | |
b75b98aa | 799 | _cpp_push_token_context (pfile, NULL, padding, 1); |
7e2fc40e | 800 | } |
2b0e25fe | 801 | |
802 | return NULL; | |
79bd622b | 803 | } |
804 | ||
941f2388 | 805 | /* Return the real number of tokens in the expansion of MACRO. */ |
806 | static inline unsigned int | |
807 | macro_real_token_count (const cpp_macro *macro) | |
808 | { | |
809 | unsigned int i; | |
810 | if (__builtin_expect (!macro->extra_tokens, true)) | |
811 | return macro->count; | |
812 | for (i = 0; i < macro->count; i++) | |
813 | if (macro->exp.tokens[i].type == CPP_PASTE) | |
814 | return i; | |
815 | abort (); | |
816 | } | |
817 | ||
88cf66fa | 818 | /* Push the context of a macro with hash entry NODE onto the context |
819 | stack. If we can successfully expand the macro, we push a context | |
820 | containing its yet-to-be-rescanned replacement list and return one. | |
45f9f140 | 821 | If there were additionally any unexpanded deferred #pragma directives |
822 | among macro arguments, push another context containing the | |
823 | pragma tokens before the yet-to-be-rescanned replacement list | |
824 | and return two. Otherwise, we don't push a context and return zero. */ | |
69461e0d | 825 | static int |
45f9f140 | 826 | enter_macro_context (cpp_reader *pfile, cpp_hashnode *node, |
827 | const cpp_token *result) | |
69461e0d | 828 | { |
88cf66fa | 829 | /* The presence of a macro invalidates a file's controlling macro. */ |
c7e5d924 | 830 | pfile->mi_valid = false; |
831 | ||
606942e3 | 832 | pfile->state.angled_headers = false; |
833 | ||
34c3de48 | 834 | if ((node->flags & NODE_BUILTIN) && !(node->flags & NODE_USED)) |
835 | { | |
836 | node->flags |= NODE_USED; | |
837 | if (pfile->cb.used_define) | |
838 | pfile->cb.used_define (pfile, pfile->directive_line, node); | |
839 | } | |
840 | ||
88cf66fa | 841 | /* Handle standard macros. */ |
c7e5d924 | 842 | if (! (node->flags & NODE_BUILTIN)) |
69461e0d | 843 | { |
f9b5f742 | 844 | cpp_macro *macro = node->value.macro; |
45f9f140 | 845 | _cpp_buff *pragma_buff = NULL; |
3c7df4d3 | 846 | |
2b0e25fe | 847 | if (macro->fun_like) |
848 | { | |
849 | _cpp_buff *buff; | |
850 | ||
851 | pfile->state.prevent_expansion++; | |
852 | pfile->keep_tokens++; | |
853 | pfile->state.parsing_args = 1; | |
45f9f140 | 854 | buff = funlike_invocation_p (pfile, node, &pragma_buff); |
2b0e25fe | 855 | pfile->state.parsing_args = 0; |
856 | pfile->keep_tokens--; | |
857 | pfile->state.prevent_expansion--; | |
858 | ||
859 | if (buff == NULL) | |
860 | { | |
861 | if (CPP_WTRADITIONAL (pfile) && ! node->value.macro->syshdr) | |
d80d2074 | 862 | cpp_error (pfile, CPP_DL_WARNING, |
2b0e25fe | 863 | "function-like macro \"%s\" must be used with arguments in traditional C", |
73328dce | 864 | NODE_NAME (node)); |
2b0e25fe | 865 | |
45f9f140 | 866 | if (pragma_buff) |
867 | _cpp_release_buff (pfile, pragma_buff); | |
868 | ||
2b0e25fe | 869 | return 0; |
870 | } | |
871 | ||
d6af0368 | 872 | if (macro->paramc > 0) |
873 | replace_args (pfile, node, macro, (macro_arg *) buff->base); | |
2b0e25fe | 874 | _cpp_release_buff (pfile, buff); |
875 | } | |
79bd622b | 876 | |
f9b5f742 | 877 | /* Disable the macro within its expansion. */ |
c7e5d924 | 878 | node->flags |= NODE_DISABLED; |
79bd622b | 879 | |
34c3de48 | 880 | if (!(node->flags & NODE_USED)) |
881 | { | |
882 | node->flags |= NODE_USED; | |
883 | if (pfile->cb.used_define) | |
884 | pfile->cb.used_define (pfile, pfile->directive_line, node); | |
885 | } | |
886 | ||
71a7c282 | 887 | macro->used = 1; |
888 | ||
f9b5f742 | 889 | if (macro->paramc == 0) |
941f2388 | 890 | _cpp_push_token_context (pfile, node, macro->exp.tokens, |
891 | macro_real_token_count (macro)); | |
c7e5d924 | 892 | |
45f9f140 | 893 | if (pragma_buff) |
894 | { | |
895 | if (!pfile->state.in_directive) | |
896 | _cpp_push_token_context (pfile, NULL, | |
897 | padding_token (pfile, result), 1); | |
898 | do | |
899 | { | |
900 | _cpp_buff *tail = pragma_buff->next; | |
901 | pragma_buff->next = NULL; | |
902 | push_ptoken_context (pfile, NULL, pragma_buff, | |
903 | (const cpp_token **) pragma_buff->base, | |
904 | ((const cpp_token **) BUFF_FRONT (pragma_buff) | |
905 | - (const cpp_token **) pragma_buff->base)); | |
906 | pragma_buff = tail; | |
907 | } | |
908 | while (pragma_buff != NULL); | |
909 | return 2; | |
910 | } | |
911 | ||
c7e5d924 | 912 | return 1; |
69461e0d | 913 | } |
c7e5d924 | 914 | |
88cf66fa | 915 | /* Handle built-in macros and the _Pragma operator. */ |
c7e5d924 | 916 | return builtin_macro (pfile, node); |
79bd622b | 917 | } |
918 | ||
88cf66fa | 919 | /* Replace the parameters in a function-like macro of NODE with the |
920 | actual ARGS, and place the result in a newly pushed token context. | |
921 | Expand each argument before replacing, unless it is operated upon | |
922 | by the # or ## operators. */ | |
79bd622b | 923 | static void |
f7fdd7a1 | 924 | replace_args (cpp_reader *pfile, cpp_hashnode *node, cpp_macro *macro, macro_arg *args) |
79bd622b | 925 | { |
926 | unsigned int i, total; | |
927 | const cpp_token *src, *limit; | |
f9b5f742 | 928 | const cpp_token **dest, **first; |
79bd622b | 929 | macro_arg *arg; |
084163dc | 930 | _cpp_buff *buff; |
941f2388 | 931 | unsigned int count; |
79bd622b | 932 | |
79bd622b | 933 | /* First, fully macro-expand arguments, calculating the number of |
084163dc | 934 | tokens in the final expansion as we go. The ordering of the if |
935 | statements below is subtle; we must handle stringification before | |
936 | pasting. */ | |
941f2388 | 937 | count = macro_real_token_count (macro); |
938 | total = count; | |
939 | limit = macro->exp.tokens + count; | |
f9b5f742 | 940 | |
672f38da | 941 | for (src = macro->exp.tokens; src < limit; src++) |
79bd622b | 942 | if (src->type == CPP_MACRO_ARG) |
943 | { | |
f9b5f742 | 944 | /* Leading and trailing padding tokens. */ |
945 | total += 2; | |
946 | ||
79bd622b | 947 | /* We have an argument. If it is not being stringified or |
948 | pasted it is macro-replaced before insertion. */ | |
33344a1c | 949 | arg = &args[src->val.arg_no - 1]; |
3c7df4d3 | 950 | |
79bd622b | 951 | if (src->flags & STRINGIFY_ARG) |
952 | { | |
953 | if (!arg->stringified) | |
f9b5f742 | 954 | arg->stringified = stringify_arg (pfile, arg); |
79bd622b | 955 | } |
956 | else if ((src->flags & PASTE_LEFT) | |
672f38da | 957 | || (src > macro->exp.tokens && (src[-1].flags & PASTE_LEFT))) |
79bd622b | 958 | total += arg->count - 1; |
959 | else | |
960 | { | |
961 | if (!arg->expanded) | |
f9b5f742 | 962 | expand_arg (pfile, arg); |
79bd622b | 963 | total += arg->expanded_count - 1; |
964 | } | |
965 | } | |
966 | ||
f9b5f742 | 967 | /* Now allocate space for the expansion, copy the tokens and replace |
968 | the arguments. */ | |
084163dc | 969 | buff = _cpp_get_buff (pfile, total * sizeof (cpp_token *)); |
970 | first = (const cpp_token **) buff->base; | |
f9b5f742 | 971 | dest = first; |
79bd622b | 972 | |
672f38da | 973 | for (src = macro->exp.tokens; src < limit; src++) |
f9b5f742 | 974 | { |
975 | unsigned int count; | |
976 | const cpp_token **from, **paste_flag; | |
79bd622b | 977 | |
f9b5f742 | 978 | if (src->type != CPP_MACRO_ARG) |
979 | { | |
980 | *dest++ = src; | |
981 | continue; | |
982 | } | |
79bd622b | 983 | |
f9b5f742 | 984 | paste_flag = 0; |
985 | arg = &args[src->val.arg_no - 1]; | |
986 | if (src->flags & STRINGIFY_ARG) | |
987 | count = 1, from = &arg->stringified; | |
988 | else if (src->flags & PASTE_LEFT) | |
989 | count = arg->count, from = arg->first; | |
672f38da | 990 | else if (src != macro->exp.tokens && (src[-1].flags & PASTE_LEFT)) |
f9b5f742 | 991 | { |
992 | count = arg->count, from = arg->first; | |
993 | if (dest != first) | |
994 | { | |
f9b5f742 | 995 | if (dest[-1]->type == CPP_COMMA |
996 | && macro->variadic | |
997 | && src->val.arg_no == macro->paramc) | |
998 | { | |
ed909a09 | 999 | /* Swallow a pasted comma if from == NULL, otherwise |
1000 | drop the paste flag. */ | |
1001 | if (from == NULL) | |
f9b5f742 | 1002 | dest--; |
1003 | else | |
1004 | paste_flag = dest - 1; | |
1005 | } | |
1006 | /* Remove the paste flag if the RHS is a placemarker. */ | |
1007 | else if (count == 0) | |
1008 | paste_flag = dest - 1; | |
1009 | } | |
1010 | } | |
1011 | else | |
1012 | count = arg->expanded_count, from = arg->expanded; | |
3c7df4d3 | 1013 | |
f9b5f742 | 1014 | /* Padding on the left of an argument (unless RHS of ##). */ |
7825551f | 1015 | if ((!pfile->state.in_directive || pfile->state.directive_wants_padding) |
672f38da | 1016 | && src != macro->exp.tokens && !(src[-1].flags & PASTE_LEFT)) |
f9b5f742 | 1017 | *dest++ = padding_token (pfile, src); |
79bd622b | 1018 | |
f9b5f742 | 1019 | if (count) |
1020 | { | |
1021 | memcpy (dest, from, count * sizeof (cpp_token *)); | |
1022 | dest += count; | |
79bd622b | 1023 | |
f9b5f742 | 1024 | /* With a non-empty argument on the LHS of ##, the last |
1025 | token should be flagged PASTE_LEFT. */ | |
1026 | if (src->flags & PASTE_LEFT) | |
1027 | paste_flag = dest - 1; | |
1028 | } | |
403c2b12 | 1029 | else if (CPP_PEDANTIC (pfile) && ! macro->syshdr |
1030 | && ! CPP_OPTION (pfile, c99) | |
1031 | && ! cpp_in_system_header (pfile)) | |
1032 | { | |
1033 | cpp_error (pfile, CPP_DL_PEDWARN, | |
1034 | "invoking macro %s argument %d: " | |
1035 | "empty macro arguments are undefined" | |
1036 | " in ISO C90 and ISO C++98", | |
1037 | NODE_NAME (node), | |
1038 | src->val.arg_no); | |
1039 | } | |
efdcc728 | 1040 | |
f9b5f742 | 1041 | /* Avoid paste on RHS (even case count == 0). */ |
1042 | if (!pfile->state.in_directive && !(src->flags & PASTE_LEFT)) | |
1043 | *dest++ = &pfile->avoid_paste; | |
79bd622b | 1044 | |
f9b5f742 | 1045 | /* Add a new paste flag, or remove an unwanted one. */ |
1046 | if (paste_flag) | |
1047 | { | |
1048 | cpp_token *token = _cpp_temp_token (pfile); | |
1049 | token->type = (*paste_flag)->type; | |
960391da | 1050 | token->val = (*paste_flag)->val; |
f9b5f742 | 1051 | if (src->flags & PASTE_LEFT) |
1052 | token->flags = (*paste_flag)->flags | PASTE_LEFT; | |
1053 | else | |
1054 | token->flags = (*paste_flag)->flags & ~PASTE_LEFT; | |
1055 | *paste_flag = token; | |
1056 | } | |
1057 | } | |
3c7df4d3 | 1058 | |
79bd622b | 1059 | /* Free the expanded arguments. */ |
1060 | for (i = 0; i < macro->paramc; i++) | |
f9b5f742 | 1061 | if (args[i].expanded) |
1062 | free (args[i].expanded); | |
1063 | ||
c7e5d924 | 1064 | push_ptoken_context (pfile, node, buff, first, dest - first); |
f9b5f742 | 1065 | } |
1066 | ||
1067 | /* Return a special padding token, with padding inherited from SOURCE. */ | |
1068 | static const cpp_token * | |
f7fdd7a1 | 1069 | padding_token (cpp_reader *pfile, const cpp_token *source) |
f9b5f742 | 1070 | { |
1071 | cpp_token *result = _cpp_temp_token (pfile); | |
1072 | ||
1073 | result->type = CPP_PADDING; | |
bb30d1f4 | 1074 | |
1075 | /* Data in GCed data structures cannot be made const so far, so we | |
1076 | need a cast here. */ | |
1077 | result->val.source = (cpp_token *) source; | |
f9b5f742 | 1078 | result->flags = 0; |
1079 | return result; | |
1080 | } | |
1081 | ||
88cf66fa | 1082 | /* Get a new uninitialized context. Create a new one if we cannot |
1083 | re-use an old one. */ | |
f9b5f742 | 1084 | static cpp_context * |
f7fdd7a1 | 1085 | next_context (cpp_reader *pfile) |
f9b5f742 | 1086 | { |
1087 | cpp_context *result = pfile->context->next; | |
1088 | ||
1089 | if (result == 0) | |
69461e0d | 1090 | { |
3b298764 | 1091 | result = XNEW (cpp_context); |
f9b5f742 | 1092 | result->prev = pfile->context; |
1093 | result->next = 0; | |
1094 | pfile->context->next = result; | |
79bd622b | 1095 | } |
f9b5f742 | 1096 | |
1097 | pfile->context = result; | |
1098 | return result; | |
79bd622b | 1099 | } |
1100 | ||
f9b5f742 | 1101 | /* Push a list of pointers to tokens. */ |
1102 | static void | |
f7fdd7a1 | 1103 | push_ptoken_context (cpp_reader *pfile, cpp_hashnode *macro, _cpp_buff *buff, |
1104 | const cpp_token **first, unsigned int count) | |
79bd622b | 1105 | { |
1106 | cpp_context *context = next_context (pfile); | |
79bd622b | 1107 | |
f9b5f742 | 1108 | context->direct_p = false; |
1109 | context->macro = macro; | |
084163dc | 1110 | context->buff = buff; |
a854276a | 1111 | FIRST (context).ptoken = first; |
1112 | LAST (context).ptoken = first + count; | |
f9b5f742 | 1113 | } |
1114 | ||
1115 | /* Push a list of tokens. */ | |
b75b98aa | 1116 | void |
1117 | _cpp_push_token_context (cpp_reader *pfile, cpp_hashnode *macro, | |
1118 | const cpp_token *first, unsigned int count) | |
f9b5f742 | 1119 | { |
1120 | cpp_context *context = next_context (pfile); | |
1121 | ||
1122 | context->direct_p = true; | |
1123 | context->macro = macro; | |
084163dc | 1124 | context->buff = NULL; |
a854276a | 1125 | FIRST (context).token = first; |
1126 | LAST (context).token = first + count; | |
79bd622b | 1127 | } |
1128 | ||
f15f6c8d | 1129 | /* Push a traditional macro's replacement text. */ |
1130 | void | |
f7fdd7a1 | 1131 | _cpp_push_text_context (cpp_reader *pfile, cpp_hashnode *macro, |
1132 | const uchar *start, size_t len) | |
f15f6c8d | 1133 | { |
1134 | cpp_context *context = next_context (pfile); | |
1135 | ||
1136 | context->direct_p = true; | |
1137 | context->macro = macro; | |
1138 | context->buff = NULL; | |
1139 | CUR (context) = start; | |
06025647 | 1140 | RLIMIT (context) = start + len; |
01628c3c | 1141 | macro->flags |= NODE_DISABLED; |
f15f6c8d | 1142 | } |
1143 | ||
88cf66fa | 1144 | /* Expand an argument ARG before replacing parameters in a |
1145 | function-like macro. This works by pushing a context with the | |
1146 | argument's tokens, and then expanding that into a temporary buffer | |
1147 | as if it were a normal part of the token stream. collect_args() | |
1148 | has terminated the argument's tokens with a CPP_EOF so that we know | |
1149 | when we have fully expanded the argument. */ | |
79bd622b | 1150 | static void |
f7fdd7a1 | 1151 | expand_arg (cpp_reader *pfile, macro_arg *arg) |
79bd622b | 1152 | { |
f9b5f742 | 1153 | unsigned int capacity; |
dbb7d6f7 | 1154 | bool saved_warn_trad; |
f9b5f742 | 1155 | |
f9b5f742 | 1156 | if (arg->count == 0) |
1157 | return; | |
79bd622b | 1158 | |
dbb7d6f7 | 1159 | /* Don't warn about funlike macros when pre-expanding. */ |
1160 | saved_warn_trad = CPP_WTRADITIONAL (pfile); | |
1161 | CPP_WTRADITIONAL (pfile) = 0; | |
1162 | ||
79bd622b | 1163 | /* Loop, reading in the arguments. */ |
f9b5f742 | 1164 | capacity = 256; |
720aca92 | 1165 | arg->expanded = XNEWVEC (const cpp_token *, capacity); |
79bd622b | 1166 | |
084163dc | 1167 | push_ptoken_context (pfile, NULL, NULL, arg->first, arg->count + 1); |
f9b5f742 | 1168 | for (;;) |
79bd622b | 1169 | { |
f9b5f742 | 1170 | const cpp_token *token; |
1171 | ||
1172 | if (arg->expanded_count + 1 >= capacity) | |
69461e0d | 1173 | { |
79bd622b | 1174 | capacity *= 2; |
720aca92 | 1175 | arg->expanded = XRESIZEVEC (const cpp_token *, arg->expanded, |
1176 | capacity); | |
79bd622b | 1177 | } |
79bd622b | 1178 | |
f9b5f742 | 1179 | token = cpp_get_token (pfile); |
79bd622b | 1180 | |
f9b5f742 | 1181 | if (token->type == CPP_EOF) |
1182 | break; | |
1183 | ||
1184 | arg->expanded[arg->expanded_count++] = token; | |
1185 | } | |
1186 | ||
084163dc | 1187 | _cpp_pop_context (pfile); |
dbb7d6f7 | 1188 | |
1189 | CPP_WTRADITIONAL (pfile) = saved_warn_trad; | |
79bd622b | 1190 | } |
1191 | ||
88cf66fa | 1192 | /* Pop the current context off the stack, re-enabling the macro if the |
1193 | context represented a macro's replacement list. The context | |
1194 | structure is not freed so that we can re-use it later. */ | |
79bd622b | 1195 | void |
f7fdd7a1 | 1196 | _cpp_pop_context (cpp_reader *pfile) |
79bd622b | 1197 | { |
084163dc | 1198 | cpp_context *context = pfile->context; |
1199 | ||
084163dc | 1200 | if (context->macro) |
c7e5d924 | 1201 | context->macro->flags &= ~NODE_DISABLED; |
084163dc | 1202 | |
1203 | if (context->buff) | |
1204 | _cpp_release_buff (pfile, context->buff); | |
79bd622b | 1205 | |
084163dc | 1206 | pfile->context = context->prev; |
79bd622b | 1207 | } |
1208 | ||
5c120a72 | 1209 | /* External routine to get a token. Also used nearly everywhere |
343fd982 | 1210 | internally, except for places where we know we can safely call |
5c120a72 | 1211 | _cpp_lex_token directly, such as lexing a directive name. |
343fd982 | 1212 | |
1213 | Macro expansions and directives are transparently handled, | |
1214 | including entering included files. Thus tokens are post-macro | |
1215 | expansion, and after any intervening directives. External callers | |
1216 | see CPP_EOF only at EOF. Internal callers also see it when meeting | |
1217 | a directive inside a macro call, when at the end of a directive and | |
1218 | state.in_directive is still 1, and at the end of argument | |
1219 | pre-expansion. */ | |
f9b5f742 | 1220 | const cpp_token * |
f7fdd7a1 | 1221 | cpp_get_token (cpp_reader *pfile) |
79bd622b | 1222 | { |
f9b5f742 | 1223 | const cpp_token *result; |
931b0a0f | 1224 | bool can_set = pfile->set_invocation_location; |
1225 | pfile->set_invocation_location = false; | |
f9b5f742 | 1226 | |
def71b06 | 1227 | for (;;) |
79bd622b | 1228 | { |
f9b5f742 | 1229 | cpp_hashnode *node; |
79bd622b | 1230 | cpp_context *context = pfile->context; |
1231 | ||
79bd622b | 1232 | /* Context->prev == 0 <=> base context. */ |
fb5ab82c | 1233 | if (!context->prev) |
f9b5f742 | 1234 | result = _cpp_lex_token (pfile); |
a854276a | 1235 | else if (FIRST (context).token != LAST (context).token) |
def71b06 | 1236 | { |
f9b5f742 | 1237 | if (context->direct_p) |
a854276a | 1238 | result = FIRST (context).token++; |
f9b5f742 | 1239 | else |
a854276a | 1240 | result = *FIRST (context).ptoken++; |
f9b5f742 | 1241 | |
1242 | if (result->flags & PASTE_LEFT) | |
e55de93e | 1243 | { |
f9b5f742 | 1244 | paste_all_tokens (pfile, result); |
1245 | if (pfile->state.in_directive) | |
1246 | continue; | |
1247 | return padding_token (pfile, result); | |
e55de93e | 1248 | } |
def71b06 | 1249 | } |
79bd622b | 1250 | else |
1251 | { | |
fb5ab82c | 1252 | _cpp_pop_context (pfile); |
f9b5f742 | 1253 | if (pfile->state.in_directive) |
1254 | continue; | |
1255 | return &pfile->avoid_paste; | |
79bd622b | 1256 | } |
79bd622b | 1257 | |
d3f7919d | 1258 | if (pfile->state.in_directive && result->type == CPP_COMMENT) |
1259 | continue; | |
1260 | ||
f9b5f742 | 1261 | if (result->type != CPP_NAME) |
79bd622b | 1262 | break; |
1263 | ||
f9b5f742 | 1264 | node = result->val.node; |
1265 | ||
c7e5d924 | 1266 | if (node->type != NT_MACRO || (result->flags & NO_EXPAND)) |
1267 | break; | |
b1a9ff83 | 1268 | |
c7e5d924 | 1269 | if (!(node->flags & NODE_DISABLED)) |
79bd622b | 1270 | { |
89768577 | 1271 | int ret = 0; |
931b0a0f | 1272 | /* If not in a macro context, and we're going to start an |
1273 | expansion, record the location. */ | |
1274 | if (can_set && !context->macro) | |
1275 | pfile->invocation_location = result->src_loc; | |
45f9f140 | 1276 | if (pfile->state.prevent_expansion) |
1277 | break; | |
89768577 | 1278 | |
1279 | /* Conditional macros require that a predicate be evaluated | |
1280 | first. */ | |
4514949a | 1281 | if ((node->flags & NODE_CONDITIONAL) != 0) |
1282 | { | |
1283 | if (pfile->cb.macro_to_expand) | |
1284 | { | |
1285 | bool whitespace_after; | |
1286 | const cpp_token *peek_tok = cpp_peek_token (pfile, 0); | |
1287 | ||
1288 | whitespace_after = (peek_tok->type == CPP_PADDING | |
1289 | || (peek_tok->flags & PREV_WHITE)); | |
1290 | node = pfile->cb.macro_to_expand (pfile, result); | |
1291 | if (node) | |
1292 | ret = enter_macro_context (pfile, node, result); | |
1293 | else if (whitespace_after) | |
1294 | { | |
1295 | /* If macro_to_expand hook returned NULL and it | |
1296 | ate some tokens, see if we don't need to add | |
1297 | a padding token in between this and the | |
1298 | next token. */ | |
1299 | peek_tok = cpp_peek_token (pfile, 0); | |
1300 | if (peek_tok->type != CPP_PADDING | |
1301 | && (peek_tok->flags & PREV_WHITE) == 0) | |
1302 | _cpp_push_token_context (pfile, NULL, | |
1303 | padding_token (pfile, | |
1304 | peek_tok), 1); | |
1305 | } | |
1306 | } | |
1307 | } | |
1308 | else | |
1309 | ret = enter_macro_context (pfile, node, result); | |
1310 | if (ret) | |
89768577 | 1311 | { |
45f9f140 | 1312 | if (pfile->state.in_directive || ret == 2) |
f9b5f742 | 1313 | continue; |
1314 | return padding_token (pfile, result); | |
8c2e2fc5 | 1315 | } |
79bd622b | 1316 | } |
c7e5d924 | 1317 | else |
1318 | { | |
88cf66fa | 1319 | /* Flag this token as always unexpandable. FIXME: move this |
1320 | to collect_args()?. */ | |
c7e5d924 | 1321 | cpp_token *t = _cpp_temp_token (pfile); |
1322 | t->type = result->type; | |
1323 | t->flags = result->flags | NO_EXPAND; | |
960391da | 1324 | t->val = result->val; |
c7e5d924 | 1325 | result = t; |
1326 | } | |
396ffa86 | 1327 | |
c7e5d924 | 1328 | break; |
79bd622b | 1329 | } |
f9b5f742 | 1330 | |
1331 | return result; | |
79bd622b | 1332 | } |
1333 | ||
931b0a0f | 1334 | /* Like cpp_get_token, but also returns a location separate from the |
1335 | one provided by the returned token. LOC is an out parameter; *LOC | |
1336 | is set to the location "as expected by the user". This matters | |
1337 | when a token results from macro expansion -- the token's location | |
1338 | will indicate where the macro is defined, but *LOC will be the | |
1339 | location of the start of the expansion. */ | |
1340 | const cpp_token * | |
1341 | cpp_get_token_with_location (cpp_reader *pfile, source_location *loc) | |
1342 | { | |
1343 | const cpp_token *result; | |
1344 | ||
1345 | pfile->set_invocation_location = true; | |
1346 | result = cpp_get_token (pfile); | |
1347 | if (pfile->context->macro) | |
1348 | *loc = pfile->invocation_location; | |
1349 | else | |
1350 | *loc = result->src_loc; | |
1351 | ||
1352 | return result; | |
1353 | } | |
1354 | ||
ae2348f6 | 1355 | /* Returns true if we're expanding an object-like macro that was |
1356 | defined in a system header. Just checks the macro at the top of | |
1357 | the stack. Used for diagnostic suppression. */ | |
1358 | int | |
f7fdd7a1 | 1359 | cpp_sys_macro_p (cpp_reader *pfile) |
ae2348f6 | 1360 | { |
c7e5d924 | 1361 | cpp_hashnode *node = pfile->context->macro; |
ae2348f6 | 1362 | |
c7e5d924 | 1363 | return node && node->value.macro && node->value.macro->syshdr; |
ae2348f6 | 1364 | } |
1365 | ||
02516fb9 | 1366 | /* Read each token in, until end of the current file. Directives are |
1367 | transparently processed. */ | |
79bd622b | 1368 | void |
f7fdd7a1 | 1369 | cpp_scan_nooutput (cpp_reader *pfile) |
79bd622b | 1370 | { |
6e04daf1 | 1371 | /* Request a CPP_EOF token at the end of this file, rather than |
1372 | transparently continuing with the including file. */ | |
1373 | pfile->buffer->return_at_eof = true; | |
1374 | ||
3eb3f293 | 1375 | pfile->state.discarding_output++; |
1376 | pfile->state.prevent_expansion++; | |
1377 | ||
7951771a | 1378 | if (CPP_OPTION (pfile, traditional)) |
1379 | while (_cpp_read_logical_line_trad (pfile)) | |
1380 | ; | |
1381 | else | |
1382 | while (cpp_get_token (pfile)->type != CPP_EOF) | |
1383 | ; | |
3eb3f293 | 1384 | |
1385 | pfile->state.discarding_output--; | |
1386 | pfile->state.prevent_expansion--; | |
79bd622b | 1387 | } |
1388 | ||
89768577 | 1389 | /* Step back one or more tokens obtained from the lexer. */ |
1390 | void | |
1391 | _cpp_backup_tokens_direct (cpp_reader *pfile, unsigned int count) | |
1392 | { | |
1393 | pfile->lookaheads += count; | |
1394 | while (count--) | |
1395 | { | |
1396 | pfile->cur_token--; | |
1397 | if (pfile->cur_token == pfile->cur_run->base | |
1398 | /* Possible with -fpreprocessed and no leading #line. */ | |
1399 | && pfile->cur_run->prev != NULL) | |
1400 | { | |
1401 | pfile->cur_run = pfile->cur_run->prev; | |
1402 | pfile->cur_token = pfile->cur_run->limit; | |
1403 | } | |
1404 | } | |
1405 | } | |
1406 | ||
add258d7 | 1407 | /* Step back one (or more) tokens. Can only step back more than 1 if |
fb5ab82c | 1408 | they are from the lexer, and not from macro expansion. */ |
920b5d41 | 1409 | void |
f7fdd7a1 | 1410 | _cpp_backup_tokens (cpp_reader *pfile, unsigned int count) |
79bd622b | 1411 | { |
fb5ab82c | 1412 | if (pfile->context->prev == NULL) |
89768577 | 1413 | _cpp_backup_tokens_direct (pfile, count); |
fb5ab82c | 1414 | else |
79bd622b | 1415 | { |
fb5ab82c | 1416 | if (count != 1) |
1417 | abort (); | |
f9b5f742 | 1418 | if (pfile->context->direct_p) |
a854276a | 1419 | FIRST (pfile->context).token--; |
f9b5f742 | 1420 | else |
a854276a | 1421 | FIRST (pfile->context).ptoken--; |
79bd622b | 1422 | } |
1423 | } | |
69461e0d | 1424 | |
79bd622b | 1425 | /* #define directive parsing and handling. */ |
1426 | ||
d10cfa8d | 1427 | /* Returns nonzero if a macro redefinition warning is required. */ |
f15f6c8d | 1428 | static bool |
f7fdd7a1 | 1429 | warn_of_redefinition (cpp_reader *pfile, const cpp_hashnode *node, |
1430 | const cpp_macro *macro2) | |
79bd622b | 1431 | { |
1432 | const cpp_macro *macro1; | |
1433 | unsigned int i; | |
1434 | ||
31ca26b1 | 1435 | /* Some redefinitions need to be warned about regardless. */ |
1436 | if (node->flags & NODE_WARN) | |
f15f6c8d | 1437 | return true; |
79bd622b | 1438 | |
2ad0b097 | 1439 | /* Suppress warnings for builtins that lack the NODE_WARN flag. */ |
1440 | if (node->flags & NODE_BUILTIN) | |
1441 | return false; | |
1442 | ||
89768577 | 1443 | /* Redefinitions of conditional (context-sensitive) macros, on |
1444 | the other hand, must be allowed silently. */ | |
1445 | if (node->flags & NODE_CONDITIONAL) | |
1446 | return false; | |
1447 | ||
31ca26b1 | 1448 | /* Redefinition of a macro is allowed if and only if the old and new |
2c0e001b | 1449 | definitions are the same. (6.10.3 paragraph 2). */ |
79bd622b | 1450 | macro1 = node->value.macro; |
1451 | ||
3396dc80 | 1452 | /* Don't check count here as it can be different in valid |
1453 | traditional redefinitions with just whitespace differences. */ | |
1454 | if (macro1->paramc != macro2->paramc | |
79bd622b | 1455 | || macro1->fun_like != macro2->fun_like |
53c052ca | 1456 | || macro1->variadic != macro2->variadic) |
f15f6c8d | 1457 | return true; |
79bd622b | 1458 | |
1459 | /* Check parameter spellings. */ | |
1460 | for (i = 0; i < macro1->paramc; i++) | |
1461 | if (macro1->params[i] != macro2->params[i]) | |
f15f6c8d | 1462 | return true; |
79bd622b | 1463 | |
f15f6c8d | 1464 | /* Check the replacement text or tokens. */ |
1465 | if (CPP_OPTION (pfile, traditional)) | |
3396dc80 | 1466 | return _cpp_expansions_different_trad (macro1, macro2); |
f15f6c8d | 1467 | |
9c7ff5cc | 1468 | if (macro1->count != macro2->count) |
1469 | return true; | |
1470 | ||
1471 | for (i = 0; i < macro1->count; i++) | |
1472 | if (!_cpp_equiv_tokens (¯o1->exp.tokens[i], ¯o2->exp.tokens[i])) | |
1473 | return true; | |
f15f6c8d | 1474 | |
1475 | return false; | |
79bd622b | 1476 | } |
1477 | ||
1478 | /* Free the definition of hashnode H. */ | |
69461e0d | 1479 | void |
f7fdd7a1 | 1480 | _cpp_free_definition (cpp_hashnode *h) |
69461e0d | 1481 | { |
79bd622b | 1482 | /* Macros and assertions no longer have anything to free. */ |
1483 | h->type = NT_VOID; | |
1484 | /* Clear builtin flag in case of redefinition. */ | |
34c3de48 | 1485 | h->flags &= ~(NODE_BUILTIN | NODE_DISABLED | NODE_USED); |
79bd622b | 1486 | } |
1487 | ||
10b4496a | 1488 | /* Save parameter NODE to the parameter list of macro MACRO. Returns |
d10cfa8d | 1489 | zero on success, nonzero if the parameter is a duplicate. */ |
198b48a0 | 1490 | bool |
f7fdd7a1 | 1491 | _cpp_save_parameter (cpp_reader *pfile, cpp_macro *macro, cpp_hashnode *node) |
79bd622b | 1492 | { |
805e22b2 | 1493 | unsigned int len; |
79bd622b | 1494 | /* Constraint 6.10.3.6 - duplicate parameter names. */ |
805e22b2 | 1495 | if (node->flags & NODE_MACRO_ARG) |
11d10d3f | 1496 | { |
d80d2074 | 1497 | cpp_error (pfile, CPP_DL_ERROR, "duplicate macro parameter \"%s\"", |
73328dce | 1498 | NODE_NAME (node)); |
1ae6ed16 | 1499 | return true; |
79bd622b | 1500 | } |
11d10d3f | 1501 | |
e6a5f963 | 1502 | if (BUFF_ROOM (pfile->a_buff) |
1503 | < (macro->paramc + 1) * sizeof (cpp_hashnode *)) | |
1504 | _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (cpp_hashnode *)); | |
11d10d3f | 1505 | |
e6a5f963 | 1506 | ((cpp_hashnode **) BUFF_FRONT (pfile->a_buff))[macro->paramc++] = node; |
805e22b2 | 1507 | node->flags |= NODE_MACRO_ARG; |
1508 | len = macro->paramc * sizeof (union _cpp_hashnode_value); | |
1509 | if (len > pfile->macro_buffer_len) | |
1510 | { | |
720aca92 | 1511 | pfile->macro_buffer = XRESIZEVEC (unsigned char, pfile->macro_buffer, |
1512 | len); | |
805e22b2 | 1513 | pfile->macro_buffer_len = len; |
1514 | } | |
1515 | ((union _cpp_hashnode_value *) pfile->macro_buffer)[macro->paramc - 1] | |
1516 | = node->value; | |
1517 | ||
1518 | node->value.arg_index = macro->paramc; | |
1ae6ed16 | 1519 | return false; |
69461e0d | 1520 | } |
1521 | ||
1ae6ed16 | 1522 | /* Check the syntax of the parameters in a MACRO definition. Returns |
1523 | false if an error occurs. */ | |
1524 | static bool | |
f7fdd7a1 | 1525 | parse_params (cpp_reader *pfile, cpp_macro *macro) |
69461e0d | 1526 | { |
79bd622b | 1527 | unsigned int prev_ident = 0; |
69461e0d | 1528 | |
79bd622b | 1529 | for (;;) |
69461e0d | 1530 | { |
c00e481c | 1531 | const cpp_token *token = _cpp_lex_token (pfile); |
69461e0d | 1532 | |
c00e481c | 1533 | switch (token->type) |
69461e0d | 1534 | { |
79bd622b | 1535 | default: |
d3f7919d | 1536 | /* Allow/ignore comments in parameter lists if we are |
1537 | preserving comments in macro expansions. */ | |
1538 | if (token->type == CPP_COMMENT | |
1539 | && ! CPP_OPTION (pfile, discard_comments_in_macro_exp)) | |
1540 | continue; | |
1541 | ||
d80d2074 | 1542 | cpp_error (pfile, CPP_DL_ERROR, |
73328dce | 1543 | "\"%s\" may not appear in macro parameter list", |
c00e481c | 1544 | cpp_token_as_text (pfile, token)); |
1ae6ed16 | 1545 | return false; |
79bd622b | 1546 | |
69461e0d | 1547 | case CPP_NAME: |
79bd622b | 1548 | if (prev_ident) |
1549 | { | |
d80d2074 | 1550 | cpp_error (pfile, CPP_DL_ERROR, |
73328dce | 1551 | "macro parameters must be comma-separated"); |
1ae6ed16 | 1552 | return false; |
79bd622b | 1553 | } |
1554 | prev_ident = 1; | |
1555 | ||
198b48a0 | 1556 | if (_cpp_save_parameter (pfile, macro, token->val.node)) |
1ae6ed16 | 1557 | return false; |
79bd622b | 1558 | continue; |
69461e0d | 1559 | |
79bd622b | 1560 | case CPP_CLOSE_PAREN: |
1561 | if (prev_ident || macro->paramc == 0) | |
1ae6ed16 | 1562 | return true; |
69461e0d | 1563 | |
79bd622b | 1564 | /* Fall through to pick up the error. */ |
1565 | case CPP_COMMA: | |
1566 | if (!prev_ident) | |
1567 | { | |
d80d2074 | 1568 | cpp_error (pfile, CPP_DL_ERROR, "parameter name missing"); |
1ae6ed16 | 1569 | return false; |
79bd622b | 1570 | } |
1571 | prev_ident = 0; | |
69461e0d | 1572 | continue; |
1573 | ||
79bd622b | 1574 | case CPP_ELLIPSIS: |
53c052ca | 1575 | macro->variadic = 1; |
79bd622b | 1576 | if (!prev_ident) |
1577 | { | |
198b48a0 | 1578 | _cpp_save_parameter (pfile, macro, |
1579 | pfile->spec_nodes.n__VA_ARGS__); | |
79bd622b | 1580 | pfile->state.va_args_ok = 1; |
05d51900 | 1581 | if (! CPP_OPTION (pfile, c99) |
1582 | && CPP_OPTION (pfile, pedantic) | |
1583 | && CPP_OPTION (pfile, warn_variadic_macros)) | |
d80d2074 | 1584 | cpp_error (pfile, CPP_DL_PEDWARN, |
73328dce | 1585 | "anonymous variadic macros were introduced in C99"); |
79bd622b | 1586 | } |
05d51900 | 1587 | else if (CPP_OPTION (pfile, pedantic) |
1588 | && CPP_OPTION (pfile, warn_variadic_macros)) | |
d80d2074 | 1589 | cpp_error (pfile, CPP_DL_PEDWARN, |
73328dce | 1590 | "ISO C does not permit named variadic macros"); |
69461e0d | 1591 | |
79bd622b | 1592 | /* We're at the end, and just expect a closing parenthesis. */ |
c00e481c | 1593 | token = _cpp_lex_token (pfile); |
1594 | if (token->type == CPP_CLOSE_PAREN) | |
1ae6ed16 | 1595 | return true; |
79bd622b | 1596 | /* Fall through. */ |
69461e0d | 1597 | |
79bd622b | 1598 | case CPP_EOF: |
d80d2074 | 1599 | cpp_error (pfile, CPP_DL_ERROR, "missing ')' in macro parameter list"); |
1ae6ed16 | 1600 | return false; |
69461e0d | 1601 | } |
69461e0d | 1602 | } |
79bd622b | 1603 | } |
1604 | ||
10b4496a | 1605 | /* Allocate room for a token from a macro's replacement list. */ |
79bd622b | 1606 | static cpp_token * |
f7fdd7a1 | 1607 | alloc_expansion_token (cpp_reader *pfile, cpp_macro *macro) |
79bd622b | 1608 | { |
e6a5f963 | 1609 | if (BUFF_ROOM (pfile->a_buff) < (macro->count + 1) * sizeof (cpp_token)) |
1610 | _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (cpp_token)); | |
69461e0d | 1611 | |
e6a5f963 | 1612 | return &((cpp_token *) BUFF_FRONT (pfile->a_buff))[macro->count++]; |
10b4496a | 1613 | } |
1614 | ||
88cf66fa | 1615 | /* Lex a token from the expansion of MACRO, but mark parameters as we |
1616 | find them and warn of traditional stringification. */ | |
10b4496a | 1617 | static cpp_token * |
f7fdd7a1 | 1618 | lex_expansion_token (cpp_reader *pfile, cpp_macro *macro) |
10b4496a | 1619 | { |
e0ff7935 | 1620 | cpp_token *token, *saved_cur_token; |
10b4496a | 1621 | |
e0ff7935 | 1622 | saved_cur_token = pfile->cur_token; |
10b4496a | 1623 | pfile->cur_token = alloc_expansion_token (pfile, macro); |
1624 | token = _cpp_lex_direct (pfile); | |
e0ff7935 | 1625 | pfile->cur_token = saved_cur_token; |
79bd622b | 1626 | |
88cf66fa | 1627 | /* Is this a parameter? */ |
805e22b2 | 1628 | if (token->type == CPP_NAME |
1629 | && (token->val.node->flags & NODE_MACRO_ARG) != 0) | |
79bd622b | 1630 | { |
1631 | token->type = CPP_MACRO_ARG; | |
805e22b2 | 1632 | token->val.arg_no = token->val.node->value.arg_index; |
79bd622b | 1633 | } |
1634 | else if (CPP_WTRADITIONAL (pfile) && macro->paramc > 0 | |
1635 | && (token->type == CPP_STRING || token->type == CPP_CHAR)) | |
1636 | check_trad_stringification (pfile, macro, &token->val.str); | |
1637 | ||
1638 | return token; | |
69461e0d | 1639 | } |
1640 | ||
f15f6c8d | 1641 | static bool |
f7fdd7a1 | 1642 | create_iso_definition (cpp_reader *pfile, cpp_macro *macro) |
69461e0d | 1643 | { |
f15f6c8d | 1644 | cpp_token *token; |
10b4496a | 1645 | const cpp_token *ctoken; |
3b6c638e | 1646 | bool following_paste_op = false; |
1647 | const char *paste_op_error_msg = | |
1648 | N_("'##' cannot appear at either end of a macro expansion"); | |
941f2388 | 1649 | unsigned int num_extra_tokens = 0; |
79bd622b | 1650 | |
1651 | /* Get the first token of the expansion (or the '(' of a | |
1652 | function-like macro). */ | |
10b4496a | 1653 | ctoken = _cpp_lex_token (pfile); |
1654 | ||
1655 | if (ctoken->type == CPP_OPEN_PAREN && !(ctoken->flags & PREV_WHITE)) | |
79bd622b | 1656 | { |
f15f6c8d | 1657 | bool ok = parse_params (pfile, macro); |
e6a5f963 | 1658 | macro->params = (cpp_hashnode **) BUFF_FRONT (pfile->a_buff); |
1659 | if (!ok) | |
f15f6c8d | 1660 | return false; |
e6a5f963 | 1661 | |
c39ed964 | 1662 | /* Success. Commit or allocate the parameter array. */ |
1663 | if (pfile->hash_table->alloc_subobject) | |
1664 | { | |
720aca92 | 1665 | cpp_hashnode **params = |
1666 | (cpp_hashnode **) pfile->hash_table->alloc_subobject | |
1667 | (sizeof (cpp_hashnode *) * macro->paramc); | |
bb30d1f4 | 1668 | memcpy (params, macro->params, |
1669 | sizeof (cpp_hashnode *) * macro->paramc); | |
1670 | macro->params = params; | |
c39ed964 | 1671 | } |
1672 | else | |
1673 | BUFF_FRONT (pfile->a_buff) = (uchar *) ¯o->params[macro->paramc]; | |
79bd622b | 1674 | macro->fun_like = 1; |
79bd622b | 1675 | } |
10b4496a | 1676 | else if (ctoken->type != CPP_EOF && !(ctoken->flags & PREV_WHITE)) |
99617355 | 1677 | { |
1678 | /* While ISO C99 requires whitespace before replacement text | |
1679 | in a macro definition, ISO C90 with TC1 allows there characters | |
1680 | from the basic source character set. */ | |
1681 | if (CPP_OPTION (pfile, c99)) | |
1682 | cpp_error (pfile, CPP_DL_PEDWARN, | |
1683 | "ISO C99 requires whitespace after the macro name"); | |
1684 | else | |
1685 | { | |
1686 | int warntype = CPP_DL_WARNING; | |
1687 | switch (ctoken->type) | |
1688 | { | |
1689 | case CPP_ATSIGN: | |
1690 | case CPP_AT_NAME: | |
1691 | case CPP_OBJC_STRING: | |
1692 | /* '@' is not in basic character set. */ | |
1693 | warntype = CPP_DL_PEDWARN; | |
1694 | break; | |
1695 | case CPP_OTHER: | |
1696 | /* Basic character set sans letters, digits and _. */ | |
1697 | if (strchr ("!\"#%&'()*+,-./:;<=>?[\\]^{|}~", | |
1698 | ctoken->val.str.text[0]) == NULL) | |
1699 | warntype = CPP_DL_PEDWARN; | |
1700 | break; | |
1701 | default: | |
1702 | /* All other tokens start with a character from basic | |
1703 | character set. */ | |
1704 | break; | |
1705 | } | |
1706 | cpp_error (pfile, warntype, | |
1707 | "missing whitespace after the macro name"); | |
1708 | } | |
1709 | } | |
69461e0d | 1710 | |
10b4496a | 1711 | if (macro->fun_like) |
1712 | token = lex_expansion_token (pfile, macro); | |
1713 | else | |
1714 | { | |
1715 | token = alloc_expansion_token (pfile, macro); | |
1716 | *token = *ctoken; | |
1717 | } | |
69461e0d | 1718 | |
79bd622b | 1719 | for (;;) |
1720 | { | |
1721 | /* Check the stringifying # constraint 6.10.3.2.1 of | |
1722 | function-like macros when lexing the subsequent token. */ | |
1723 | if (macro->count > 1 && token[-1].type == CPP_HASH && macro->fun_like) | |
1724 | { | |
1725 | if (token->type == CPP_MACRO_ARG) | |
1726 | { | |
941f2388 | 1727 | if (token->flags & PREV_WHITE) |
1728 | token->flags |= SP_PREV_WHITE; | |
1729 | if (token[-1].flags & DIGRAPH) | |
1730 | token->flags |= SP_DIGRAPH; | |
79bd622b | 1731 | token->flags &= ~PREV_WHITE; |
1732 | token->flags |= STRINGIFY_ARG; | |
1733 | token->flags |= token[-1].flags & PREV_WHITE; | |
1734 | token[-1] = token[0]; | |
1735 | macro->count--; | |
1736 | } | |
1737 | /* Let assembler get away with murder. */ | |
5db5d057 | 1738 | else if (CPP_OPTION (pfile, lang) != CLK_ASM) |
79bd622b | 1739 | { |
d80d2074 | 1740 | cpp_error (pfile, CPP_DL_ERROR, |
73328dce | 1741 | "'#' is not followed by a macro parameter"); |
f15f6c8d | 1742 | return false; |
79bd622b | 1743 | } |
1744 | } | |
1745 | ||
1746 | if (token->type == CPP_EOF) | |
3b6c638e | 1747 | { |
1748 | /* Paste operator constraint 6.10.3.3.1: | |
1749 | Token-paste ##, can appear in both object-like and | |
1750 | function-like macros, but not at the end. */ | |
1751 | if (following_paste_op) | |
1752 | { | |
1753 | cpp_error (pfile, CPP_DL_ERROR, paste_op_error_msg); | |
1754 | return false; | |
1755 | } | |
1756 | break; | |
1757 | } | |
79bd622b | 1758 | |
1759 | /* Paste operator constraint 6.10.3.3.1. */ | |
1760 | if (token->type == CPP_PASTE) | |
1761 | { | |
1762 | /* Token-paste ##, can appear in both object-like and | |
3b6c638e | 1763 | function-like macros, but not at the beginning. */ |
1764 | if (macro->count == 1) | |
79bd622b | 1765 | { |
3b6c638e | 1766 | cpp_error (pfile, CPP_DL_ERROR, paste_op_error_msg); |
f15f6c8d | 1767 | return false; |
79bd622b | 1768 | } |
69461e0d | 1769 | |
941f2388 | 1770 | if (token[-1].flags & PASTE_LEFT) |
1771 | { | |
1772 | macro->extra_tokens = 1; | |
1773 | num_extra_tokens++; | |
1774 | token->val.arg_no = macro->count - 1; | |
1775 | } | |
1776 | else | |
1777 | { | |
1778 | --macro->count; | |
1779 | token[-1].flags |= PASTE_LEFT; | |
1780 | if (token->flags & DIGRAPH) | |
1781 | token[-1].flags |= SP_DIGRAPH; | |
1782 | if (token->flags & PREV_WHITE) | |
1783 | token[-1].flags |= SP_PREV_WHITE; | |
1784 | } | |
79bd622b | 1785 | } |
1786 | ||
3b6c638e | 1787 | following_paste_op = (token->type == CPP_PASTE); |
79bd622b | 1788 | token = lex_expansion_token (pfile, macro); |
1789 | } | |
1790 | ||
672f38da | 1791 | macro->exp.tokens = (cpp_token *) BUFF_FRONT (pfile->a_buff); |
c39ed964 | 1792 | macro->traditional = 0; |
e6a5f963 | 1793 | |
3c7df4d3 | 1794 | /* Don't count the CPP_EOF. */ |
1795 | macro->count--; | |
79bd622b | 1796 | |
88cf66fa | 1797 | /* Clear whitespace on first token for warn_of_redefinition(). */ |
e6a5f963 | 1798 | if (macro->count) |
672f38da | 1799 | macro->exp.tokens[0].flags &= ~PREV_WHITE; |
e6a5f963 | 1800 | |
c39ed964 | 1801 | /* Commit or allocate the memory. */ |
1802 | if (pfile->hash_table->alloc_subobject) | |
1803 | { | |
720aca92 | 1804 | cpp_token *tokns = |
1805 | (cpp_token *) pfile->hash_table->alloc_subobject (sizeof (cpp_token) | |
1806 | * macro->count); | |
941f2388 | 1807 | if (num_extra_tokens) |
1808 | { | |
1809 | /* Place second and subsequent ## or %:%: tokens in | |
1810 | sequences of consecutive such tokens at the end of the | |
1811 | list to preserve information about where they appear, how | |
1812 | they are spelt and whether they are preceded by | |
1813 | whitespace without otherwise interfering with macro | |
1814 | expansion. */ | |
1815 | cpp_token *normal_dest = tokns; | |
1816 | cpp_token *extra_dest = tokns + macro->count - num_extra_tokens; | |
1817 | unsigned int i; | |
1818 | for (i = 0; i < macro->count; i++) | |
1819 | { | |
1820 | if (macro->exp.tokens[i].type == CPP_PASTE) | |
1821 | *extra_dest++ = macro->exp.tokens[i]; | |
1822 | else | |
1823 | *normal_dest++ = macro->exp.tokens[i]; | |
1824 | } | |
1825 | } | |
1826 | else | |
1827 | memcpy (tokns, macro->exp.tokens, sizeof (cpp_token) * macro->count); | |
c39ed964 | 1828 | macro->exp.tokens = tokns; |
1829 | } | |
1830 | else | |
1831 | BUFF_FRONT (pfile->a_buff) = (uchar *) ¯o->exp.tokens[macro->count]; | |
e6a5f963 | 1832 | |
f15f6c8d | 1833 | return true; |
1834 | } | |
1835 | ||
d10cfa8d | 1836 | /* Parse a macro and save its expansion. Returns nonzero on success. */ |
f15f6c8d | 1837 | bool |
f7fdd7a1 | 1838 | _cpp_create_definition (cpp_reader *pfile, cpp_hashnode *node) |
f15f6c8d | 1839 | { |
1840 | cpp_macro *macro; | |
1841 | unsigned int i; | |
1842 | bool ok; | |
4dab9f9f | 1843 | |
c39ed964 | 1844 | if (pfile->hash_table->alloc_subobject) |
720aca92 | 1845 | macro = (cpp_macro *) pfile->hash_table->alloc_subobject |
1846 | (sizeof (cpp_macro)); | |
c39ed964 | 1847 | else |
1848 | macro = (cpp_macro *) _cpp_aligned_alloc (pfile, sizeof (cpp_macro)); | |
f15f6c8d | 1849 | macro->line = pfile->directive_line; |
1850 | macro->params = 0; | |
1851 | macro->paramc = 0; | |
1852 | macro->variadic = 0; | |
b717e161 | 1853 | macro->used = !CPP_OPTION (pfile, warn_unused_macros); |
f15f6c8d | 1854 | macro->count = 0; |
1855 | macro->fun_like = 0; | |
941f2388 | 1856 | macro->extra_tokens = 0; |
ae2348f6 | 1857 | /* To suppress some diagnostics. */ |
610625e3 | 1858 | macro->syshdr = pfile->buffer && pfile->buffer->sysp != 0; |
ae2348f6 | 1859 | |
f15f6c8d | 1860 | if (CPP_OPTION (pfile, traditional)) |
1861 | ok = _cpp_create_trad_definition (pfile, macro); | |
1862 | else | |
1863 | { | |
f15f6c8d | 1864 | ok = create_iso_definition (pfile, macro); |
1865 | ||
e0ff7935 | 1866 | /* We set the type for SEEN_EOL() in directives.c. |
f15f6c8d | 1867 | |
1868 | Longer term we should lex the whole line before coming here, | |
1869 | and just copy the expansion. */ | |
f15f6c8d | 1870 | |
1871 | /* Stop the lexer accepting __VA_ARGS__. */ | |
1872 | pfile->state.va_args_ok = 0; | |
1873 | } | |
1874 | ||
1875 | /* Clear the fast argument lookup indices. */ | |
1876 | for (i = macro->paramc; i-- > 0; ) | |
805e22b2 | 1877 | { |
1878 | struct cpp_hashnode *node = macro->params[i]; | |
1879 | node->flags &= ~ NODE_MACRO_ARG; | |
1880 | node->value = ((union _cpp_hashnode_value *) pfile->macro_buffer)[i]; | |
1881 | } | |
f15f6c8d | 1882 | |
1883 | if (!ok) | |
1884 | return ok; | |
1885 | ||
70145d81 | 1886 | if (node->type == NT_MACRO) |
69461e0d | 1887 | { |
71a7c282 | 1888 | if (CPP_OPTION (pfile, warn_unused_macros)) |
1889 | _cpp_warn_if_unused_macro (pfile, node, NULL); | |
1890 | ||
f15f6c8d | 1891 | if (warn_of_redefinition (pfile, node, macro)) |
69461e0d | 1892 | { |
7f5f3953 | 1893 | bool warned; |
1894 | warned = cpp_error_with_line (pfile, CPP_DL_PEDWARN, | |
1895 | pfile->directive_line, 0, | |
1896 | "\"%s\" redefined", NODE_NAME (node)); | |
79bd622b | 1897 | |
7f5f3953 | 1898 | if (warned && node->type == NT_MACRO && !(node->flags & NODE_BUILTIN)) |
1899 | cpp_error_with_line (pfile, CPP_DL_NOTE, | |
f15f6c8d | 1900 | node->value.macro->line, 0, |
1901 | "this is the location of the previous definition"); | |
69461e0d | 1902 | } |
69461e0d | 1903 | } |
1904 | ||
70145d81 | 1905 | if (node->type != NT_VOID) |
1906 | _cpp_free_definition (node); | |
1907 | ||
69461e0d | 1908 | /* Enter definition in hash table. */ |
79bd622b | 1909 | node->type = NT_MACRO; |
1910 | node->value.macro = macro; | |
5eb3761c | 1911 | if (! ustrncmp (NODE_NAME (node), DSC ("__STDC_")) |
a56d0856 | 1912 | && ustrcmp (NODE_NAME (node), (const uchar *) "__STDC_FORMAT_MACROS") |
1913 | /* __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS are mentioned | |
1914 | in the C standard, as something that one must use in C++. | |
1915 | However DR#593 indicates that these aren't actually mentioned | |
1916 | in the C++ standard. We special-case them anyway. */ | |
1917 | && ustrcmp (NODE_NAME (node), (const uchar *) "__STDC_LIMIT_MACROS") | |
1918 | && ustrcmp (NODE_NAME (node), (const uchar *) "__STDC_CONSTANT_MACROS")) | |
31ca26b1 | 1919 | node->flags |= NODE_WARN; |
69461e0d | 1920 | |
89768577 | 1921 | /* If user defines one of the conditional macros, remove the |
1922 | conditional flag */ | |
1923 | node->flags &= ~NODE_CONDITIONAL; | |
1924 | ||
79bd622b | 1925 | return ok; |
69461e0d | 1926 | } |
1927 | ||
88cf66fa | 1928 | /* Warn if a token in STRING matches one of a function-like MACRO's |
1929 | parameters. */ | |
bceb9193 | 1930 | static void |
f7fdd7a1 | 1931 | check_trad_stringification (cpp_reader *pfile, const cpp_macro *macro, |
1932 | const cpp_string *string) | |
bceb9193 | 1933 | { |
79bd622b | 1934 | unsigned int i, len; |
4970d4c2 | 1935 | const uchar *p, *q, *limit; |
b1a9ff83 | 1936 | |
bceb9193 | 1937 | /* Loop over the string. */ |
4970d4c2 | 1938 | limit = string->text + string->len - 1; |
1939 | for (p = string->text + 1; p < limit; p = q) | |
bceb9193 | 1940 | { |
bceb9193 | 1941 | /* Find the start of an identifier. */ |
7e118154 | 1942 | while (p < limit && !is_idstart (*p)) |
1943 | p++; | |
bceb9193 | 1944 | |
1945 | /* Find the end of the identifier. */ | |
1946 | q = p; | |
7e118154 | 1947 | while (q < limit && is_idchar (*q)) |
1948 | q++; | |
79bd622b | 1949 | |
1950 | len = q - p; | |
1951 | ||
bceb9193 | 1952 | /* Loop over the function macro arguments to see if the |
1953 | identifier inside the string matches one of them. */ | |
79bd622b | 1954 | for (i = 0; i < macro->paramc; i++) |
1955 | { | |
1956 | const cpp_hashnode *node = macro->params[i]; | |
bceb9193 | 1957 | |
0d086e18 | 1958 | if (NODE_LEN (node) == len |
1959 | && !memcmp (p, NODE_NAME (node), len)) | |
bceb9193 | 1960 | { |
d80d2074 | 1961 | cpp_error (pfile, CPP_DL_WARNING, |
455730ef | 1962 | "macro argument \"%s\" would be stringified in traditional C", |
73328dce | 1963 | NODE_NAME (node)); |
bceb9193 | 1964 | break; |
1965 | } | |
1966 | } | |
1967 | } | |
1968 | } | |
79bd622b | 1969 | |
4d9e9a28 | 1970 | /* Returns the name, arguments and expansion of a macro, in a format |
1971 | suitable to be read back in again, and therefore also for DWARF 2 | |
1972 | debugging info. e.g. "PASTE(X, Y) X ## Y", or "MACNAME EXPANSION". | |
1973 | Caller is expected to generate the "#define" bit if needed. The | |
79bd622b | 1974 | returned text is temporary, and automatically freed later. */ |
79bd622b | 1975 | const unsigned char * |
f7fdd7a1 | 1976 | cpp_macro_definition (cpp_reader *pfile, const cpp_hashnode *node) |
79bd622b | 1977 | { |
1978 | unsigned int i, len; | |
1979 | const cpp_macro *macro = node->value.macro; | |
1980 | unsigned char *buffer; | |
1981 | ||
1982 | if (node->type != NT_MACRO || (node->flags & NODE_BUILTIN)) | |
1983 | { | |
d80d2074 | 1984 | cpp_error (pfile, CPP_DL_ICE, |
73328dce | 1985 | "invalid hash type %d in cpp_macro_definition", node->type); |
79bd622b | 1986 | return 0; |
1987 | } | |
1988 | ||
1989 | /* Calculate length. */ | |
f6bf950b | 1990 | len = NODE_LEN (node) + 2; /* ' ' and NUL. */ |
79bd622b | 1991 | if (macro->fun_like) |
1992 | { | |
3a68fd94 | 1993 | len += 4; /* "()" plus possible final ".." of named |
1994 | varargs (we have + 1 below). */ | |
79bd622b | 1995 | for (i = 0; i < macro->paramc; i++) |
3a68fd94 | 1996 | len += NODE_LEN (macro->params[i]) + 1; /* "," */ |
79bd622b | 1997 | } |
1998 | ||
9936e07d | 1999 | /* This should match below where we fill in the buffer. */ |
9c343313 | 2000 | if (CPP_OPTION (pfile, traditional)) |
2001 | len += _cpp_replacement_text_len (macro); | |
2002 | else | |
79bd622b | 2003 | { |
941f2388 | 2004 | unsigned int count = macro_real_token_count (macro); |
2005 | for (i = 0; i < count; i++) | |
9c343313 | 2006 | { |
2007 | cpp_token *token = ¯o->exp.tokens[i]; | |
79bd622b | 2008 | |
9c343313 | 2009 | if (token->type == CPP_MACRO_ARG) |
2010 | len += NODE_LEN (macro->params[token->val.arg_no - 1]); | |
2011 | else | |
9936e07d | 2012 | len += cpp_token_len (token); |
2013 | ||
9c343313 | 2014 | if (token->flags & STRINGIFY_ARG) |
2015 | len++; /* "#" */ | |
2016 | if (token->flags & PASTE_LEFT) | |
2017 | len += 3; /* " ##" */ | |
9936e07d | 2018 | if (token->flags & PREV_WHITE) |
2019 | len++; /* " " */ | |
9c343313 | 2020 | } |
79bd622b | 2021 | } |
2022 | ||
2023 | if (len > pfile->macro_buffer_len) | |
8744fb7e | 2024 | { |
720aca92 | 2025 | pfile->macro_buffer = XRESIZEVEC (unsigned char, |
2026 | pfile->macro_buffer, len); | |
8744fb7e | 2027 | pfile->macro_buffer_len = len; |
2028 | } | |
4d9e9a28 | 2029 | |
2030 | /* Fill in the buffer. Start with the macro name. */ | |
79bd622b | 2031 | buffer = pfile->macro_buffer; |
4d9e9a28 | 2032 | memcpy (buffer, NODE_NAME (node), NODE_LEN (node)); |
2033 | buffer += NODE_LEN (node); | |
79bd622b | 2034 | |
2035 | /* Parameter names. */ | |
2036 | if (macro->fun_like) | |
2037 | { | |
2038 | *buffer++ = '('; | |
2039 | for (i = 0; i < macro->paramc; i++) | |
2040 | { | |
2041 | cpp_hashnode *param = macro->params[i]; | |
2042 | ||
2043 | if (param != pfile->spec_nodes.n__VA_ARGS__) | |
2044 | { | |
c86dbc5b | 2045 | memcpy (buffer, NODE_NAME (param), NODE_LEN (param)); |
2046 | buffer += NODE_LEN (param); | |
79bd622b | 2047 | } |
2048 | ||
2049 | if (i + 1 < macro->paramc) | |
b1a9ff83 | 2050 | /* Don't emit a space after the comma here; we're trying |
2051 | to emit a Dwarf-friendly definition, and the Dwarf spec | |
2052 | forbids spaces in the argument list. */ | |
3a68fd94 | 2053 | *buffer++ = ','; |
53c052ca | 2054 | else if (macro->variadic) |
79bd622b | 2055 | *buffer++ = '.', *buffer++ = '.', *buffer++ = '.'; |
2056 | } | |
2057 | *buffer++ = ')'; | |
2058 | } | |
2059 | ||
920e5093 | 2060 | /* The Dwarf spec requires a space after the macro name, even if the |
2061 | definition is the empty string. */ | |
2062 | *buffer++ = ' '; | |
2063 | ||
9c343313 | 2064 | if (CPP_OPTION (pfile, traditional)) |
2065 | buffer = _cpp_copy_replacement_text (macro, buffer); | |
2066 | else if (macro->count) | |
79bd622b | 2067 | /* Expansion tokens. */ |
79bd622b | 2068 | { |
941f2388 | 2069 | unsigned int count = macro_real_token_count (macro); |
2070 | for (i = 0; i < count; i++) | |
79bd622b | 2071 | { |
672f38da | 2072 | cpp_token *token = ¯o->exp.tokens[i]; |
79bd622b | 2073 | |
2074 | if (token->flags & PREV_WHITE) | |
2075 | *buffer++ = ' '; | |
2076 | if (token->flags & STRINGIFY_ARG) | |
2077 | *buffer++ = '#'; | |
2078 | ||
2079 | if (token->type == CPP_MACRO_ARG) | |
2080 | { | |
c86dbc5b | 2081 | memcpy (buffer, |
9936e07d | 2082 | NODE_NAME (macro->params[token->val.arg_no - 1]), |
2083 | NODE_LEN (macro->params[token->val.arg_no - 1])); | |
2084 | buffer += NODE_LEN (macro->params[token->val.arg_no - 1]); | |
79bd622b | 2085 | } |
2086 | else | |
bb1fa6bb | 2087 | buffer = cpp_spell_token (pfile, token, buffer, false); |
79bd622b | 2088 | |
2089 | if (token->flags & PASTE_LEFT) | |
2090 | { | |
2091 | *buffer++ = ' '; | |
2092 | *buffer++ = '#'; | |
2093 | *buffer++ = '#'; | |
2094 | /* Next has PREV_WHITE; see _cpp_create_definition. */ | |
2095 | } | |
2096 | } | |
2097 | } | |
2098 | ||
2099 | *buffer = '\0'; | |
2100 | return pfile->macro_buffer; | |
2101 | } |