Mercurial > hg > CbC > CbC_gcc
annotate libcpp/macro.c @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
| author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 22 Mar 2011 17:18:12 +0900 |
| parents | b7f97abdc517 |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* Part of CPP library. (Macro and #define handling.) |
| 2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1998, | |
| 3 1999, 2000, 2001, 2002, 2003, 2004, 2005, | |
|
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f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
4 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
| 0 | 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 | |
| 11 Free Software Foundation; either version 3, or (at your option) any | |
| 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 | |
| 20 along with this program; see the file COPYING3. If not see | |
| 21 <http://www.gnu.org/licenses/>. | |
| 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" | |
| 30 #include "internal.h" | |
| 31 | |
| 32 typedef struct macro_arg macro_arg; | |
| 33 struct macro_arg | |
| 34 { | |
| 35 const cpp_token **first; /* First token in unexpanded argument. */ | |
| 36 const cpp_token **expanded; /* Macro-expanded argument. */ | |
| 37 const cpp_token *stringified; /* Stringified argument. */ | |
| 38 unsigned int count; /* # of tokens in argument. */ | |
| 39 unsigned int expanded_count; /* # of tokens in expanded argument. */ | |
| 40 }; | |
| 41 | |
| 42 /* Macro expansion. */ | |
| 43 | |
| 44 static int enter_macro_context (cpp_reader *, cpp_hashnode *, | |
| 45 const cpp_token *); | |
| 46 static int builtin_macro (cpp_reader *, cpp_hashnode *); | |
| 47 static void push_ptoken_context (cpp_reader *, cpp_hashnode *, _cpp_buff *, | |
| 48 const cpp_token **, unsigned int); | |
| 49 static _cpp_buff *collect_args (cpp_reader *, const cpp_hashnode *, | |
| 50 _cpp_buff **); | |
| 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 *); | |
| 60 static _cpp_buff *funlike_invocation_p (cpp_reader *, cpp_hashnode *, | |
| 61 _cpp_buff **); | |
| 62 static bool create_iso_definition (cpp_reader *, cpp_macro *); | |
| 63 | |
| 64 /* #define directive parsing and handling. */ | |
| 65 | |
| 66 static cpp_token *alloc_expansion_token (cpp_reader *, cpp_macro *); | |
| 67 static cpp_token *lex_expansion_token (cpp_reader *, cpp_macro *); | |
|
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update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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68 static bool warn_of_redefinition (cpp_reader *, cpp_hashnode *, |
| 0 | 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 *); | |
| 73 | |
| 74 /* Emits a warning if NODE is a macro defined in the main file that | |
| 75 has not been used. */ | |
| 76 int | |
| 77 _cpp_warn_if_unused_macro (cpp_reader *pfile, cpp_hashnode *node, | |
| 78 void *v ATTRIBUTE_UNUSED) | |
| 79 { | |
| 80 if (node->type == NT_MACRO && !(node->flags & NODE_BUILTIN)) | |
| 81 { | |
| 82 cpp_macro *macro = node->value.macro; | |
| 83 | |
| 84 if (!macro->used | |
| 85 && MAIN_FILE_P (linemap_lookup (pfile->line_table, macro->line))) | |
|
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parents:
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86 cpp_warning_with_line (pfile, CPP_W_UNUSED_MACROS, macro->line, 0, |
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changeset
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87 "macro \"%s\" is not used", NODE_NAME (node)); |
| 0 | 88 } |
| 89 | |
| 90 return 1; | |
| 91 } | |
| 92 | |
| 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 * | |
| 96 new_string_token (cpp_reader *pfile, unsigned char *text, unsigned int len) | |
| 97 { | |
| 98 cpp_token *token = _cpp_temp_token (pfile); | |
| 99 | |
| 100 text[len] = '\0'; | |
| 101 token->type = CPP_STRING; | |
| 102 token->val.str.len = len; | |
| 103 token->val.str.text = text; | |
| 104 token->flags = 0; | |
| 105 return token; | |
| 106 } | |
| 107 | |
| 108 static const char * const monthnames[] = | |
| 109 { | |
| 110 "Jan", "Feb", "Mar", "Apr", "May", "Jun", | |
| 111 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" | |
| 112 }; | |
| 113 | |
| 114 /* Helper function for builtin_macro. Returns the text generated by | |
| 115 a builtin macro. */ | |
| 116 const uchar * | |
| 117 _cpp_builtin_macro_text (cpp_reader *pfile, cpp_hashnode *node) | |
| 118 { | |
| 119 const struct line_map *map; | |
| 120 const uchar *result = NULL; | |
| 121 linenum_type number = 1; | |
| 122 | |
| 123 switch (node->value.builtin) | |
| 124 { | |
| 125 default: | |
| 126 cpp_error (pfile, CPP_DL_ICE, "invalid built-in macro \"%s\"", | |
| 127 NODE_NAME (node)); | |
| 128 break; | |
| 129 | |
| 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"); | |
| 161 pbuffer->timestamp = UC"\"??? ??? ?? ??:??:?? ????\""; | |
| 162 } | |
| 163 } | |
| 164 } | |
| 165 result = pbuffer->timestamp; | |
| 166 } | |
| 167 break; | |
| 168 case BT_FILE: | |
| 169 case BT_BASE_FILE: | |
| 170 { | |
| 171 unsigned int len; | |
| 172 const char *name; | |
| 173 uchar *buf; | |
| 174 map = linemap_lookup (pfile->line_table, pfile->line_table->highest_line); | |
| 175 | |
| 176 if (node->value.builtin == BT_BASE_FILE) | |
| 177 while (! MAIN_FILE_P (map)) | |
| 178 map = INCLUDED_FROM (pfile->line_table, map); | |
| 179 | |
| 180 name = map->to_file; | |
| 181 len = strlen (name); | |
| 182 buf = _cpp_unaligned_alloc (pfile, len * 2 + 3); | |
| 183 result = buf; | |
| 184 *buf = '"'; | |
| 185 buf = cpp_quote_string (buf + 1, (const unsigned char *) name, len); | |
| 186 *buf++ = '"'; | |
| 187 *buf = '\0'; | |
| 188 } | |
| 189 break; | |
| 190 | |
| 191 case BT_INCLUDE_LEVEL: | |
| 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. */ | |
| 195 number = pfile->line_table->depth - 1; | |
| 196 break; | |
| 197 | |
| 198 case BT_SPECLINE: | |
| 199 map = &pfile->line_table->maps[pfile->line_table->used-1]; | |
| 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. */ | |
| 203 number = SOURCE_LINE (map, | |
| 204 CPP_OPTION (pfile, traditional) | |
| 205 ? pfile->line_table->highest_line | |
| 206 : pfile->cur_token[-1].src_loc); | |
| 207 break; | |
| 208 | |
| 209 /* __STDC__ has the value 1 under normal circumstances. | |
| 210 However, if (a) we are in a system header, (b) the option | |
| 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 | |
| 213 value 0. (b) and (c) are already checked in cpp_init_builtins. */ | |
| 214 case BT_STDC: | |
| 215 if (cpp_in_system_header (pfile)) | |
| 216 number = 0; | |
| 217 else | |
| 218 number = 1; | |
| 219 break; | |
| 220 | |
| 221 case BT_DATE: | |
| 222 case BT_TIME: | |
| 223 if (pfile->date == NULL) | |
| 224 { | |
| 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. */ | |
| 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\"", | |
| 245 monthnames[tb->tm_mon], tb->tm_mday, | |
| 246 tb->tm_year + 1900); | |
| 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 { | |
| 255 cpp_errno (pfile, CPP_DL_WARNING, | |
| 256 "could not determine date and time"); | |
| 257 | |
| 258 pfile->date = UC"\"??? ?? ????\""; | |
| 259 pfile->time = UC"\"??:??:??\""; | |
| 260 } | |
| 261 } | |
| 262 | |
| 263 if (node->value.builtin == BT_DATE) | |
| 264 result = pfile->date; | |
| 265 else | |
| 266 result = pfile->time; | |
| 267 break; | |
| 268 | |
| 269 case BT_COUNTER: | |
| 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"); | |
| 273 number = pfile->counter++; | |
| 274 break; | |
| 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 | |
| 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 | |
| 290 return the token to the caller. */ | |
| 291 static int | |
| 292 builtin_macro (cpp_reader *pfile, cpp_hashnode *node) | |
| 293 { | |
| 294 const uchar *buf; | |
| 295 size_t len; | |
| 296 char *nbuf; | |
| 297 | |
| 298 if (node->value.builtin == BT_PRAGMA) | |
| 299 { | |
| 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 | |
| 305 return _cpp_do__Pragma (pfile); | |
| 306 } | |
| 307 | |
| 308 buf = _cpp_builtin_macro_text (pfile, node); | |
| 309 len = ustrlen (buf); | |
| 310 nbuf = (char *) alloca (len + 1); | |
| 311 memcpy (nbuf, buf, len); | |
| 312 nbuf[len]='\n'; | |
| 313 | |
| 314 cpp_push_buffer (pfile, (uchar *) nbuf, len, /* from_stage3 */ true); | |
| 315 _cpp_clean_line (pfile); | |
| 316 | |
| 317 /* Set pfile->cur_token as required by _cpp_lex_direct. */ | |
| 318 pfile->cur_token = _cpp_temp_token (pfile); | |
| 319 _cpp_push_token_context (pfile, NULL, _cpp_lex_direct (pfile), 1); | |
| 320 if (pfile->buffer->cur != pfile->buffer->rlimit) | |
| 321 cpp_error (pfile, CPP_DL_ICE, "invalid built-in macro \"%s\"", | |
| 322 NODE_NAME (node)); | |
| 323 _cpp_pop_buffer (pfile); | |
| 324 | |
| 325 return 1; | |
| 326 } | |
| 327 | |
| 328 /* Copies SRC, of length LEN, to DEST, adding backslashes before all | |
| 329 backslashes and double quotes. DEST must be of sufficient size. | |
| 330 Returns a pointer to the end of the string. */ | |
| 331 uchar * | |
| 332 cpp_quote_string (uchar *dest, const uchar *src, unsigned int len) | |
| 333 { | |
| 334 while (len--) | |
| 335 { | |
| 336 uchar c = *src++; | |
| 337 | |
| 338 if (c == '\\' || c == '"') | |
| 339 { | |
| 340 *dest++ = '\\'; | |
| 341 *dest++ = c; | |
| 342 } | |
| 343 else | |
| 344 *dest++ = c; | |
| 345 } | |
| 346 | |
| 347 return dest; | |
| 348 } | |
| 349 | |
| 350 /* Convert a token sequence ARG to a single string token according to | |
| 351 the rules of the ISO C #-operator. */ | |
| 352 static const cpp_token * | |
| 353 stringify_arg (cpp_reader *pfile, macro_arg *arg) | |
| 354 { | |
| 355 unsigned char *dest; | |
| 356 unsigned int i, escape_it, backslash_count = 0; | |
| 357 const cpp_token *source = NULL; | |
| 358 size_t len; | |
| 359 | |
| 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 | |
| 365 /* Loop, reading in the argument's tokens. */ | |
| 366 for (i = 0; i < arg->count; i++) | |
| 367 { | |
| 368 const cpp_token *token = arg->first[i]; | |
| 369 | |
| 370 if (token->type == CPP_PADDING) | |
| 371 { | |
|
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parents:
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372 if (source == NULL |
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373 || (!(source->flags & PREV_WHITE) |
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parents:
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374 && token->val.source == NULL)) |
| 0 | 375 source = token->val.source; |
| 376 continue; | |
| 377 } | |
| 378 | |
| 379 escape_it = (token->type == CPP_STRING || token->type == CPP_CHAR | |
| 36 | 380 || token->type == CPP_WSTRING || token->type == CPP_WCHAR |
| 0 | 381 || token->type == CPP_STRING32 || token->type == CPP_CHAR32 |
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382 || token->type == CPP_STRING16 || token->type == CPP_CHAR16 |
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parents:
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383 || token->type == CPP_UTF8STRING); |
| 0 | 384 |
| 385 /* Room for each char being written in octal, initial space and | |
| 386 final quote and NUL. */ | |
| 387 len = cpp_token_len (token); | |
| 388 if (escape_it) | |
| 389 len *= 4; | |
| 390 len += 3; | |
| 391 | |
| 392 if ((size_t) (BUFF_LIMIT (pfile->u_buff) - dest) < len) | |
| 393 { | |
| 394 size_t len_so_far = dest - BUFF_FRONT (pfile->u_buff); | |
| 395 _cpp_extend_buff (pfile, &pfile->u_buff, len); | |
| 396 dest = BUFF_FRONT (pfile->u_buff) + len_so_far; | |
| 397 } | |
| 398 | |
| 399 /* Leading white space? */ | |
| 400 if (dest - 1 != BUFF_FRONT (pfile->u_buff)) | |
| 401 { | |
| 402 if (source == NULL) | |
| 403 source = token; | |
| 404 if (source->flags & PREV_WHITE) | |
| 405 *dest++ = ' '; | |
| 406 } | |
| 407 source = NULL; | |
| 408 | |
| 409 if (escape_it) | |
| 410 { | |
| 411 _cpp_buff *buff = _cpp_get_buff (pfile, len); | |
| 412 unsigned char *buf = BUFF_FRONT (buff); | |
| 413 len = cpp_spell_token (pfile, token, buf, true) - buf; | |
| 414 dest = cpp_quote_string (dest, buf, len); | |
| 415 _cpp_release_buff (pfile, buff); | |
| 416 } | |
| 417 else | |
| 418 dest = cpp_spell_token (pfile, token, dest, true); | |
| 419 | |
| 420 if (token->type == CPP_OTHER && token->val.str.text[0] == '\\') | |
| 421 backslash_count++; | |
| 422 else | |
| 423 backslash_count = 0; | |
| 424 } | |
| 425 | |
| 426 /* Ignore the final \ of invalid string literals. */ | |
| 427 if (backslash_count & 1) | |
| 428 { | |
| 429 cpp_error (pfile, CPP_DL_WARNING, | |
| 430 "invalid string literal, ignoring final '\\'"); | |
| 431 dest--; | |
| 432 } | |
| 433 | |
| 434 /* Commit the memory, including NUL, and return the token. */ | |
| 435 *dest++ = '"'; | |
| 436 len = dest - BUFF_FRONT (pfile->u_buff); | |
| 437 BUFF_FRONT (pfile->u_buff) = dest + 1; | |
| 438 return new_string_token (pfile, dest - len, len); | |
| 439 } | |
| 440 | |
| 441 /* Try to paste two tokens. On success, return nonzero. In any | |
| 442 case, PLHS is updated to point to the pasted token, which is | |
| 443 guaranteed to not have the PASTE_LEFT flag set. */ | |
| 444 static bool | |
| 445 paste_tokens (cpp_reader *pfile, const cpp_token **plhs, const cpp_token *rhs) | |
| 446 { | |
| 447 unsigned char *buf, *end, *lhsend; | |
| 448 cpp_token *lhs; | |
| 449 unsigned int len; | |
| 450 | |
| 451 len = cpp_token_len (*plhs) + cpp_token_len (rhs) + 1; | |
| 452 buf = (unsigned char *) alloca (len); | |
| 453 end = lhsend = cpp_spell_token (pfile, *plhs, buf, false); | |
| 454 | |
| 455 /* Avoid comment headers, since they are still processed in stage 3. | |
| 456 It is simpler to insert a space here, rather than modifying the | |
| 457 lexer to ignore comments in some circumstances. Simply returning | |
| 458 false doesn't work, since we want to clear the PASTE_LEFT flag. */ | |
| 459 if ((*plhs)->type == CPP_DIV && rhs->type != CPP_EQ) | |
| 460 *end++ = ' '; | |
| 461 /* In one obscure case we might see padding here. */ | |
| 462 if (rhs->type != CPP_PADDING) | |
| 463 end = cpp_spell_token (pfile, rhs, end, false); | |
| 464 *end = '\n'; | |
| 465 | |
| 466 cpp_push_buffer (pfile, buf, end - buf, /* from_stage3 */ true); | |
| 467 _cpp_clean_line (pfile); | |
| 468 | |
| 469 /* Set pfile->cur_token as required by _cpp_lex_direct. */ | |
| 470 pfile->cur_token = _cpp_temp_token (pfile); | |
| 471 lhs = _cpp_lex_direct (pfile); | |
| 472 if (pfile->buffer->cur != pfile->buffer->rlimit) | |
| 473 { | |
| 474 source_location saved_loc = lhs->src_loc; | |
| 475 | |
| 476 _cpp_pop_buffer (pfile); | |
| 477 _cpp_backup_tokens (pfile, 1); | |
| 478 *lhsend = '\0'; | |
| 479 | |
| 480 /* We have to remove the PASTE_LEFT flag from the old lhs, but | |
| 481 we want to keep the new location. */ | |
| 482 *lhs = **plhs; | |
| 483 *plhs = lhs; | |
| 484 lhs->src_loc = saved_loc; | |
| 485 lhs->flags &= ~PASTE_LEFT; | |
| 486 | |
| 487 /* Mandatory error for all apart from assembler. */ | |
| 488 if (CPP_OPTION (pfile, lang) != CLK_ASM) | |
| 489 cpp_error (pfile, CPP_DL_ERROR, | |
| 490 "pasting \"%s\" and \"%s\" does not give a valid preprocessing token", | |
| 491 buf, cpp_token_as_text (pfile, rhs)); | |
| 492 return false; | |
| 493 } | |
| 494 | |
| 495 *plhs = lhs; | |
| 496 _cpp_pop_buffer (pfile); | |
| 497 return true; | |
| 498 } | |
| 499 | |
| 500 /* Handles an arbitrarily long sequence of ## operators, with initial | |
| 501 operand LHS. This implementation is left-associative, | |
| 502 non-recursive, and finishes a paste before handling succeeding | |
| 503 ones. If a paste fails, we back up to the RHS of the failing ## | |
| 504 operator before pushing the context containing the result of prior | |
| 505 successful pastes, with the effect that the RHS appears in the | |
| 506 output stream after the pasted LHS normally. */ | |
| 507 static void | |
| 508 paste_all_tokens (cpp_reader *pfile, const cpp_token *lhs) | |
| 509 { | |
| 510 const cpp_token *rhs; | |
| 511 cpp_context *context = pfile->context; | |
| 512 | |
| 513 do | |
| 514 { | |
| 515 /* Take the token directly from the current context. We can do | |
| 516 this, because we are in the replacement list of either an | |
| 517 object-like macro, or a function-like macro with arguments | |
| 518 inserted. In either case, the constraints to #define | |
| 519 guarantee we have at least one more token. */ | |
| 520 if (context->direct_p) | |
| 521 rhs = FIRST (context).token++; | |
| 522 else | |
| 523 rhs = *FIRST (context).ptoken++; | |
| 524 | |
| 525 if (rhs->type == CPP_PADDING) | |
| 526 { | |
| 527 if (rhs->flags & PASTE_LEFT) | |
| 528 abort (); | |
| 529 } | |
| 530 if (!paste_tokens (pfile, &lhs, rhs)) | |
| 531 break; | |
| 532 } | |
| 533 while (rhs->flags & PASTE_LEFT); | |
| 534 | |
| 535 /* Put the resulting token in its own context. */ | |
| 536 _cpp_push_token_context (pfile, NULL, lhs, 1); | |
| 537 } | |
| 538 | |
| 539 /* Returns TRUE if the number of arguments ARGC supplied in an | |
| 540 invocation of the MACRO referenced by NODE is valid. An empty | |
| 541 invocation to a macro with no parameters should pass ARGC as zero. | |
| 542 | |
| 543 Note that MACRO cannot necessarily be deduced from NODE, in case | |
| 544 NODE was redefined whilst collecting arguments. */ | |
| 545 bool | |
| 546 _cpp_arguments_ok (cpp_reader *pfile, cpp_macro *macro, const cpp_hashnode *node, unsigned int argc) | |
| 547 { | |
| 548 if (argc == macro->paramc) | |
| 549 return true; | |
| 550 | |
| 551 if (argc < macro->paramc) | |
| 552 { | |
| 553 /* As an extension, a rest argument is allowed to not appear in | |
| 554 the invocation at all. | |
| 555 e.g. #define debug(format, args...) something | |
| 556 debug("string"); | |
| 557 | |
| 558 This is exactly the same as if there had been an empty rest | |
| 559 argument - debug("string", ). */ | |
| 560 | |
| 561 if (argc + 1 == macro->paramc && macro->variadic) | |
| 562 { | |
| 563 if (CPP_PEDANTIC (pfile) && ! macro->syshdr) | |
| 564 cpp_error (pfile, CPP_DL_PEDWARN, | |
| 565 "ISO C99 requires rest arguments to be used"); | |
| 566 return true; | |
| 567 } | |
| 568 | |
| 569 cpp_error (pfile, CPP_DL_ERROR, | |
| 570 "macro \"%s\" requires %u arguments, but only %u given", | |
| 571 NODE_NAME (node), macro->paramc, argc); | |
| 572 } | |
| 573 else | |
| 574 cpp_error (pfile, CPP_DL_ERROR, | |
| 575 "macro \"%s\" passed %u arguments, but takes just %u", | |
| 576 NODE_NAME (node), argc, macro->paramc); | |
| 577 | |
| 578 return false; | |
| 579 } | |
| 580 | |
| 581 /* Reads and returns the arguments to a function-like macro | |
| 582 invocation. Assumes the opening parenthesis has been processed. | |
| 583 If there is an error, emits an appropriate diagnostic and returns | |
| 584 NULL. Each argument is terminated by a CPP_EOF token, for the | |
| 585 future benefit of expand_arg(). If there are any deferred | |
| 586 #pragma directives among macro arguments, store pointers to the | |
| 587 CPP_PRAGMA ... CPP_PRAGMA_EOL tokens into *PRAGMA_BUFF buffer. */ | |
| 588 static _cpp_buff * | |
| 589 collect_args (cpp_reader *pfile, const cpp_hashnode *node, | |
| 590 _cpp_buff **pragma_buff) | |
| 591 { | |
| 592 _cpp_buff *buff, *base_buff; | |
| 593 cpp_macro *macro; | |
| 594 macro_arg *args, *arg; | |
| 595 const cpp_token *token; | |
| 596 unsigned int argc; | |
| 597 | |
| 598 macro = node->value.macro; | |
| 599 if (macro->paramc) | |
| 600 argc = macro->paramc; | |
| 601 else | |
| 602 argc = 1; | |
| 603 buff = _cpp_get_buff (pfile, argc * (50 * sizeof (cpp_token *) | |
| 604 + sizeof (macro_arg))); | |
| 605 base_buff = buff; | |
| 606 args = (macro_arg *) buff->base; | |
| 607 memset (args, 0, argc * sizeof (macro_arg)); | |
| 608 buff->cur = (unsigned char *) &args[argc]; | |
| 609 arg = args, argc = 0; | |
| 610 | |
| 611 /* Collect the tokens making up each argument. We don't yet know | |
| 612 how many arguments have been supplied, whether too many or too | |
| 613 few. Hence the slightly bizarre usage of "argc" and "arg". */ | |
| 614 do | |
| 615 { | |
| 616 unsigned int paren_depth = 0; | |
| 617 unsigned int ntokens = 0; | |
| 618 | |
| 619 argc++; | |
| 620 arg->first = (const cpp_token **) buff->cur; | |
| 621 | |
| 622 for (;;) | |
| 623 { | |
| 624 /* Require space for 2 new tokens (including a CPP_EOF). */ | |
| 625 if ((unsigned char *) &arg->first[ntokens + 2] > buff->limit) | |
| 626 { | |
| 627 buff = _cpp_append_extend_buff (pfile, buff, | |
| 628 1000 * sizeof (cpp_token *)); | |
| 629 arg->first = (const cpp_token **) buff->cur; | |
| 630 } | |
| 631 | |
| 632 token = cpp_get_token (pfile); | |
| 633 | |
| 634 if (token->type == CPP_PADDING) | |
| 635 { | |
| 636 /* Drop leading padding. */ | |
| 637 if (ntokens == 0) | |
| 638 continue; | |
| 639 } | |
| 640 else if (token->type == CPP_OPEN_PAREN) | |
| 641 paren_depth++; | |
| 642 else if (token->type == CPP_CLOSE_PAREN) | |
| 643 { | |
| 644 if (paren_depth-- == 0) | |
| 645 break; | |
| 646 } | |
| 647 else if (token->type == CPP_COMMA) | |
| 648 { | |
| 649 /* A comma does not terminate an argument within | |
| 650 parentheses or as part of a variable argument. */ | |
| 651 if (paren_depth == 0 | |
| 652 && ! (macro->variadic && argc == macro->paramc)) | |
| 653 break; | |
| 654 } | |
| 655 else if (token->type == CPP_EOF | |
| 656 || (token->type == CPP_HASH && token->flags & BOL)) | |
| 657 break; | |
| 658 else if (token->type == CPP_PRAGMA) | |
| 659 { | |
| 660 cpp_token *newtok = _cpp_temp_token (pfile); | |
| 661 | |
| 662 /* CPP_PRAGMA token lives in directive_result, which will | |
| 663 be overwritten on the next directive. */ | |
| 664 *newtok = *token; | |
| 665 token = newtok; | |
| 666 do | |
| 667 { | |
| 668 if (*pragma_buff == NULL | |
| 669 || BUFF_ROOM (*pragma_buff) < sizeof (cpp_token *)) | |
| 670 { | |
| 671 _cpp_buff *next; | |
| 672 if (*pragma_buff == NULL) | |
| 673 *pragma_buff | |
| 674 = _cpp_get_buff (pfile, 32 * sizeof (cpp_token *)); | |
| 675 else | |
| 676 { | |
| 677 next = *pragma_buff; | |
| 678 *pragma_buff | |
| 679 = _cpp_get_buff (pfile, | |
| 680 (BUFF_FRONT (*pragma_buff) | |
| 681 - (*pragma_buff)->base) * 2); | |
| 682 (*pragma_buff)->next = next; | |
| 683 } | |
| 684 } | |
| 685 *(const cpp_token **) BUFF_FRONT (*pragma_buff) = token; | |
| 686 BUFF_FRONT (*pragma_buff) += sizeof (cpp_token *); | |
| 687 if (token->type == CPP_PRAGMA_EOL) | |
| 688 break; | |
| 689 token = cpp_get_token (pfile); | |
| 690 } | |
| 691 while (token->type != CPP_EOF); | |
| 692 | |
| 693 /* In deferred pragmas parsing_args and prevent_expansion | |
| 694 had been changed, reset it. */ | |
| 695 pfile->state.parsing_args = 2; | |
| 696 pfile->state.prevent_expansion = 1; | |
| 697 | |
| 698 if (token->type == CPP_EOF) | |
| 699 break; | |
| 700 else | |
| 701 continue; | |
| 702 } | |
| 703 | |
| 704 arg->first[ntokens++] = token; | |
| 705 } | |
| 706 | |
| 707 /* Drop trailing padding. */ | |
| 708 while (ntokens > 0 && arg->first[ntokens - 1]->type == CPP_PADDING) | |
| 709 ntokens--; | |
| 710 | |
| 711 arg->count = ntokens; | |
| 712 arg->first[ntokens] = &pfile->eof; | |
| 713 | |
| 714 /* Terminate the argument. Excess arguments loop back and | |
| 715 overwrite the final legitimate argument, before failing. */ | |
| 716 if (argc <= macro->paramc) | |
| 717 { | |
| 718 buff->cur = (unsigned char *) &arg->first[ntokens + 1]; | |
| 719 if (argc != macro->paramc) | |
| 720 arg++; | |
| 721 } | |
| 722 } | |
| 723 while (token->type != CPP_CLOSE_PAREN && token->type != CPP_EOF); | |
| 724 | |
| 725 if (token->type == CPP_EOF) | |
| 726 { | |
| 727 /* We still need the CPP_EOF to end directives, and to end | |
| 728 pre-expansion of a macro argument. Step back is not | |
| 729 unconditional, since we don't want to return a CPP_EOF to our | |
| 730 callers at the end of an -include-d file. */ | |
| 731 if (pfile->context->prev || pfile->state.in_directive) | |
| 732 _cpp_backup_tokens (pfile, 1); | |
| 733 cpp_error (pfile, CPP_DL_ERROR, | |
| 734 "unterminated argument list invoking macro \"%s\"", | |
| 735 NODE_NAME (node)); | |
| 736 } | |
| 737 else | |
| 738 { | |
| 739 /* A single empty argument is counted as no argument. */ | |
| 740 if (argc == 1 && macro->paramc == 0 && args[0].count == 0) | |
| 741 argc = 0; | |
| 742 if (_cpp_arguments_ok (pfile, macro, node, argc)) | |
| 743 { | |
| 744 /* GCC has special semantics for , ## b where b is a varargs | |
| 745 parameter: we remove the comma if b was omitted entirely. | |
| 746 If b was merely an empty argument, the comma is retained. | |
| 747 If the macro takes just one (varargs) parameter, then we | |
| 748 retain the comma only if we are standards conforming. | |
| 749 | |
| 750 If FIRST is NULL replace_args () swallows the comma. */ | |
| 751 if (macro->variadic && (argc < macro->paramc | |
| 752 || (argc == 1 && args[0].count == 0 | |
| 753 && !CPP_OPTION (pfile, std)))) | |
| 754 args[macro->paramc - 1].first = NULL; | |
| 755 return base_buff; | |
| 756 } | |
| 757 } | |
| 758 | |
| 759 /* An error occurred. */ | |
| 760 _cpp_release_buff (pfile, base_buff); | |
| 761 return NULL; | |
| 762 } | |
| 763 | |
| 764 /* Search for an opening parenthesis to the macro of NODE, in such a | |
| 765 way that, if none is found, we don't lose the information in any | |
| 766 intervening padding tokens. If we find the parenthesis, collect | |
| 767 the arguments and return the buffer containing them. PRAGMA_BUFF | |
| 768 argument is the same as in collect_args. */ | |
| 769 static _cpp_buff * | |
| 770 funlike_invocation_p (cpp_reader *pfile, cpp_hashnode *node, | |
| 771 _cpp_buff **pragma_buff) | |
| 772 { | |
| 773 const cpp_token *token, *padding = NULL; | |
| 774 | |
| 775 for (;;) | |
| 776 { | |
| 777 token = cpp_get_token (pfile); | |
| 778 if (token->type != CPP_PADDING) | |
| 779 break; | |
| 780 if (padding == NULL | |
| 781 || (!(padding->flags & PREV_WHITE) && token->val.source == NULL)) | |
| 782 padding = token; | |
| 783 } | |
| 784 | |
| 785 if (token->type == CPP_OPEN_PAREN) | |
| 786 { | |
| 787 pfile->state.parsing_args = 2; | |
| 788 return collect_args (pfile, node, pragma_buff); | |
| 789 } | |
| 790 | |
| 791 /* CPP_EOF can be the end of macro arguments, or the end of the | |
| 792 file. We mustn't back up over the latter. Ugh. */ | |
| 793 if (token->type != CPP_EOF || token == &pfile->eof) | |
| 794 { | |
| 795 /* Back up. We may have skipped padding, in which case backing | |
| 796 up more than one token when expanding macros is in general | |
| 797 too difficult. We re-insert it in its own context. */ | |
| 798 _cpp_backup_tokens (pfile, 1); | |
| 799 if (padding) | |
| 800 _cpp_push_token_context (pfile, NULL, padding, 1); | |
| 801 } | |
| 802 | |
| 803 return NULL; | |
| 804 } | |
| 805 | |
|
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806 /* Return the real number of tokens in the expansion of MACRO. */ |
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807 static inline unsigned int |
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808 macro_real_token_count (const cpp_macro *macro) |
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809 { |
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810 unsigned int i; |
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811 if (__builtin_expect (!macro->extra_tokens, true)) |
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812 return macro->count; |
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813 for (i = 0; i < macro->count; i++) |
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814 if (macro->exp.tokens[i].type == CPP_PASTE) |
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815 return i; |
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816 abort (); |
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817 } |
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818 |
| 0 | 819 /* Push the context of a macro with hash entry NODE onto the context |
| 820 stack. If we can successfully expand the macro, we push a context | |
| 821 containing its yet-to-be-rescanned replacement list and return one. | |
| 822 If there were additionally any unexpanded deferred #pragma directives | |
| 823 among macro arguments, push another context containing the | |
| 824 pragma tokens before the yet-to-be-rescanned replacement list | |
| 825 and return two. Otherwise, we don't push a context and return zero. */ | |
| 826 static int | |
| 827 enter_macro_context (cpp_reader *pfile, cpp_hashnode *node, | |
| 828 const cpp_token *result) | |
| 829 { | |
| 830 /* The presence of a macro invalidates a file's controlling macro. */ | |
| 831 pfile->mi_valid = false; | |
| 832 | |
| 833 pfile->state.angled_headers = false; | |
| 834 | |
| 835 if ((node->flags & NODE_BUILTIN) && !(node->flags & NODE_USED)) | |
| 836 { | |
| 837 node->flags |= NODE_USED; | |
|
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838 if ((!pfile->cb.user_builtin_macro |
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839 || !pfile->cb.user_builtin_macro (pfile, node)) |
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840 && pfile->cb.used_define) |
| 0 | 841 pfile->cb.used_define (pfile, pfile->directive_line, node); |
| 842 } | |
| 843 | |
| 844 /* Handle standard macros. */ | |
| 845 if (! (node->flags & NODE_BUILTIN)) | |
| 846 { | |
| 847 cpp_macro *macro = node->value.macro; | |
| 848 _cpp_buff *pragma_buff = NULL; | |
| 849 | |
| 850 if (macro->fun_like) | |
| 851 { | |
| 852 _cpp_buff *buff; | |
| 853 | |
| 854 pfile->state.prevent_expansion++; | |
| 855 pfile->keep_tokens++; | |
| 856 pfile->state.parsing_args = 1; | |
| 857 buff = funlike_invocation_p (pfile, node, &pragma_buff); | |
| 858 pfile->state.parsing_args = 0; | |
| 859 pfile->keep_tokens--; | |
| 860 pfile->state.prevent_expansion--; | |
| 861 | |
| 862 if (buff == NULL) | |
| 863 { | |
| 864 if (CPP_WTRADITIONAL (pfile) && ! node->value.macro->syshdr) | |
|
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865 cpp_warning (pfile, CPP_W_TRADITIONAL, |
| 0 | 866 "function-like macro \"%s\" must be used with arguments in traditional C", |
|
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867 NODE_NAME (node)); |
| 0 | 868 |
| 869 if (pragma_buff) | |
| 870 _cpp_release_buff (pfile, pragma_buff); | |
| 871 | |
| 872 return 0; | |
| 873 } | |
| 874 | |
| 875 if (macro->paramc > 0) | |
| 876 replace_args (pfile, node, macro, (macro_arg *) buff->base); | |
| 877 _cpp_release_buff (pfile, buff); | |
| 878 } | |
| 879 | |
| 880 /* Disable the macro within its expansion. */ | |
| 881 node->flags |= NODE_DISABLED; | |
| 882 | |
| 883 if (!(node->flags & NODE_USED)) | |
| 884 { | |
| 885 node->flags |= NODE_USED; | |
| 886 if (pfile->cb.used_define) | |
| 887 pfile->cb.used_define (pfile, pfile->directive_line, node); | |
| 888 } | |
| 889 | |
|
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890 if (pfile->cb.used) |
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891 pfile->cb.used (pfile, result->src_loc, node); |
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892 |
| 0 | 893 macro->used = 1; |
| 894 | |
| 895 if (macro->paramc == 0) | |
|
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896 _cpp_push_token_context (pfile, node, macro->exp.tokens, |
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897 macro_real_token_count (macro)); |
| 0 | 898 |
| 899 if (pragma_buff) | |
| 900 { | |
| 901 if (!pfile->state.in_directive) | |
| 902 _cpp_push_token_context (pfile, NULL, | |
| 903 padding_token (pfile, result), 1); | |
| 904 do | |
| 905 { | |
| 906 _cpp_buff *tail = pragma_buff->next; | |
| 907 pragma_buff->next = NULL; | |
| 908 push_ptoken_context (pfile, NULL, pragma_buff, | |
| 909 (const cpp_token **) pragma_buff->base, | |
| 910 ((const cpp_token **) BUFF_FRONT (pragma_buff) | |
| 911 - (const cpp_token **) pragma_buff->base)); | |
| 912 pragma_buff = tail; | |
| 913 } | |
| 914 while (pragma_buff != NULL); | |
| 915 return 2; | |
| 916 } | |
| 917 | |
| 918 return 1; | |
| 919 } | |
| 920 | |
| 921 /* Handle built-in macros and the _Pragma operator. */ | |
| 922 return builtin_macro (pfile, node); | |
| 923 } | |
| 924 | |
| 925 /* Replace the parameters in a function-like macro of NODE with the | |
| 926 actual ARGS, and place the result in a newly pushed token context. | |
| 927 Expand each argument before replacing, unless it is operated upon | |
| 928 by the # or ## operators. */ | |
| 929 static void | |
| 930 replace_args (cpp_reader *pfile, cpp_hashnode *node, cpp_macro *macro, macro_arg *args) | |
| 931 { | |
| 932 unsigned int i, total; | |
| 933 const cpp_token *src, *limit; | |
| 934 const cpp_token **dest, **first; | |
| 935 macro_arg *arg; | |
| 936 _cpp_buff *buff; | |
|
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937 unsigned int count; |
| 0 | 938 |
| 939 /* First, fully macro-expand arguments, calculating the number of | |
| 940 tokens in the final expansion as we go. The ordering of the if | |
| 941 statements below is subtle; we must handle stringification before | |
| 942 pasting. */ | |
|
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943 count = macro_real_token_count (macro); |
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944 total = count; |
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945 limit = macro->exp.tokens + count; |
| 0 | 946 |
| 947 for (src = macro->exp.tokens; src < limit; src++) | |
| 948 if (src->type == CPP_MACRO_ARG) | |
| 949 { | |
| 950 /* Leading and trailing padding tokens. */ | |
| 951 total += 2; | |
| 952 | |
| 953 /* We have an argument. If it is not being stringified or | |
| 954 pasted it is macro-replaced before insertion. */ | |
|
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955 arg = &args[src->val.macro_arg.arg_no - 1]; |
| 0 | 956 |
| 957 if (src->flags & STRINGIFY_ARG) | |
| 958 { | |
| 959 if (!arg->stringified) | |
| 960 arg->stringified = stringify_arg (pfile, arg); | |
| 961 } | |
| 962 else if ((src->flags & PASTE_LEFT) | |
| 963 || (src > macro->exp.tokens && (src[-1].flags & PASTE_LEFT))) | |
| 964 total += arg->count - 1; | |
| 965 else | |
| 966 { | |
| 967 if (!arg->expanded) | |
| 968 expand_arg (pfile, arg); | |
| 969 total += arg->expanded_count - 1; | |
| 970 } | |
| 971 } | |
| 972 | |
| 973 /* Now allocate space for the expansion, copy the tokens and replace | |
| 974 the arguments. */ | |
| 975 buff = _cpp_get_buff (pfile, total * sizeof (cpp_token *)); | |
| 976 first = (const cpp_token **) buff->base; | |
| 977 dest = first; | |
| 978 | |
| 979 for (src = macro->exp.tokens; src < limit; src++) | |
| 980 { | |
| 981 unsigned int count; | |
| 982 const cpp_token **from, **paste_flag; | |
| 983 | |
| 984 if (src->type != CPP_MACRO_ARG) | |
| 985 { | |
| 986 *dest++ = src; | |
| 987 continue; | |
| 988 } | |
| 989 | |
| 990 paste_flag = 0; | |
|
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991 arg = &args[src->val.macro_arg.arg_no - 1]; |
| 0 | 992 if (src->flags & STRINGIFY_ARG) |
| 993 count = 1, from = &arg->stringified; | |
| 994 else if (src->flags & PASTE_LEFT) | |
| 995 count = arg->count, from = arg->first; | |
| 996 else if (src != macro->exp.tokens && (src[-1].flags & PASTE_LEFT)) | |
| 997 { | |
| 998 count = arg->count, from = arg->first; | |
| 999 if (dest != first) | |
| 1000 { | |
| 1001 if (dest[-1]->type == CPP_COMMA | |
| 1002 && macro->variadic | |
|
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1003 && src->val.macro_arg.arg_no == macro->paramc) |
| 0 | 1004 { |
| 1005 /* Swallow a pasted comma if from == NULL, otherwise | |
| 1006 drop the paste flag. */ | |
| 1007 if (from == NULL) | |
| 1008 dest--; | |
| 1009 else | |
| 1010 paste_flag = dest - 1; | |
| 1011 } | |
| 1012 /* Remove the paste flag if the RHS is a placemarker. */ | |
| 1013 else if (count == 0) | |
| 1014 paste_flag = dest - 1; | |
| 1015 } | |
| 1016 } | |
| 1017 else | |
| 1018 count = arg->expanded_count, from = arg->expanded; | |
| 1019 | |
| 1020 /* Padding on the left of an argument (unless RHS of ##). */ | |
| 1021 if ((!pfile->state.in_directive || pfile->state.directive_wants_padding) | |
| 1022 && src != macro->exp.tokens && !(src[-1].flags & PASTE_LEFT)) | |
| 1023 *dest++ = padding_token (pfile, src); | |
| 1024 | |
| 1025 if (count) | |
| 1026 { | |
| 1027 memcpy (dest, from, count * sizeof (cpp_token *)); | |
| 1028 dest += count; | |
| 1029 | |
| 1030 /* With a non-empty argument on the LHS of ##, the last | |
| 1031 token should be flagged PASTE_LEFT. */ | |
| 1032 if (src->flags & PASTE_LEFT) | |
| 1033 paste_flag = dest - 1; | |
| 1034 } | |
| 1035 else if (CPP_PEDANTIC (pfile) && ! macro->syshdr | |
| 1036 && ! CPP_OPTION (pfile, c99) | |
| 1037 && ! cpp_in_system_header (pfile)) | |
| 1038 { | |
| 1039 cpp_error (pfile, CPP_DL_PEDWARN, | |
| 1040 "invoking macro %s argument %d: " | |
| 1041 "empty macro arguments are undefined" | |
| 1042 " in ISO C90 and ISO C++98", | |
| 1043 NODE_NAME (node), | |
|
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1044 src->val.macro_arg.arg_no); |
| 0 | 1045 } |
| 1046 | |
| 1047 /* Avoid paste on RHS (even case count == 0). */ | |
| 1048 if (!pfile->state.in_directive && !(src->flags & PASTE_LEFT)) | |
| 1049 *dest++ = &pfile->avoid_paste; | |
| 1050 | |
| 1051 /* Add a new paste flag, or remove an unwanted one. */ | |
| 1052 if (paste_flag) | |
| 1053 { | |
| 1054 cpp_token *token = _cpp_temp_token (pfile); | |
| 1055 token->type = (*paste_flag)->type; | |
| 1056 token->val = (*paste_flag)->val; | |
| 1057 if (src->flags & PASTE_LEFT) | |
| 1058 token->flags = (*paste_flag)->flags | PASTE_LEFT; | |
| 1059 else | |
| 1060 token->flags = (*paste_flag)->flags & ~PASTE_LEFT; | |
| 1061 *paste_flag = token; | |
| 1062 } | |
| 1063 } | |
| 1064 | |
| 1065 /* Free the expanded arguments. */ | |
| 1066 for (i = 0; i < macro->paramc; i++) | |
| 1067 if (args[i].expanded) | |
| 1068 free (args[i].expanded); | |
| 1069 | |
| 1070 push_ptoken_context (pfile, node, buff, first, dest - first); | |
| 1071 } | |
| 1072 | |
| 1073 /* Return a special padding token, with padding inherited from SOURCE. */ | |
| 1074 static const cpp_token * | |
| 1075 padding_token (cpp_reader *pfile, const cpp_token *source) | |
| 1076 { | |
| 1077 cpp_token *result = _cpp_temp_token (pfile); | |
| 1078 | |
| 1079 result->type = CPP_PADDING; | |
| 1080 | |
| 1081 /* Data in GCed data structures cannot be made const so far, so we | |
| 1082 need a cast here. */ | |
| 1083 result->val.source = (cpp_token *) source; | |
| 1084 result->flags = 0; | |
| 1085 return result; | |
| 1086 } | |
| 1087 | |
| 1088 /* Get a new uninitialized context. Create a new one if we cannot | |
| 1089 re-use an old one. */ | |
| 1090 static cpp_context * | |
| 1091 next_context (cpp_reader *pfile) | |
| 1092 { | |
| 1093 cpp_context *result = pfile->context->next; | |
| 1094 | |
| 1095 if (result == 0) | |
| 1096 { | |
| 1097 result = XNEW (cpp_context); | |
| 1098 result->prev = pfile->context; | |
| 1099 result->next = 0; | |
| 1100 pfile->context->next = result; | |
| 1101 } | |
| 1102 | |
| 1103 pfile->context = result; | |
| 1104 return result; | |
| 1105 } | |
| 1106 | |
| 1107 /* Push a list of pointers to tokens. */ | |
| 1108 static void | |
| 1109 push_ptoken_context (cpp_reader *pfile, cpp_hashnode *macro, _cpp_buff *buff, | |
| 1110 const cpp_token **first, unsigned int count) | |
| 1111 { | |
| 1112 cpp_context *context = next_context (pfile); | |
| 1113 | |
| 1114 context->direct_p = false; | |
| 1115 context->macro = macro; | |
| 1116 context->buff = buff; | |
| 1117 FIRST (context).ptoken = first; | |
| 1118 LAST (context).ptoken = first + count; | |
| 1119 } | |
| 1120 | |
| 1121 /* Push a list of tokens. */ | |
| 1122 void | |
| 1123 _cpp_push_token_context (cpp_reader *pfile, cpp_hashnode *macro, | |
| 1124 const cpp_token *first, unsigned int count) | |
| 1125 { | |
| 1126 cpp_context *context = next_context (pfile); | |
| 1127 | |
| 1128 context->direct_p = true; | |
| 1129 context->macro = macro; | |
| 1130 context->buff = NULL; | |
| 1131 FIRST (context).token = first; | |
| 1132 LAST (context).token = first + count; | |
| 1133 } | |
| 1134 | |
| 1135 /* Push a traditional macro's replacement text. */ | |
| 1136 void | |
| 1137 _cpp_push_text_context (cpp_reader *pfile, cpp_hashnode *macro, | |
| 1138 const uchar *start, size_t len) | |
| 1139 { | |
| 1140 cpp_context *context = next_context (pfile); | |
| 1141 | |
| 1142 context->direct_p = true; | |
| 1143 context->macro = macro; | |
| 1144 context->buff = NULL; | |
| 1145 CUR (context) = start; | |
| 1146 RLIMIT (context) = start + len; | |
| 1147 macro->flags |= NODE_DISABLED; | |
| 1148 } | |
| 1149 | |
| 1150 /* Expand an argument ARG before replacing parameters in a | |
| 1151 function-like macro. This works by pushing a context with the | |
| 1152 argument's tokens, and then expanding that into a temporary buffer | |
| 1153 as if it were a normal part of the token stream. collect_args() | |
| 1154 has terminated the argument's tokens with a CPP_EOF so that we know | |
| 1155 when we have fully expanded the argument. */ | |
| 1156 static void | |
| 1157 expand_arg (cpp_reader *pfile, macro_arg *arg) | |
| 1158 { | |
| 1159 unsigned int capacity; | |
| 1160 bool saved_warn_trad; | |
| 1161 | |
| 1162 if (arg->count == 0) | |
| 1163 return; | |
| 1164 | |
| 1165 /* Don't warn about funlike macros when pre-expanding. */ | |
| 1166 saved_warn_trad = CPP_WTRADITIONAL (pfile); | |
| 1167 CPP_WTRADITIONAL (pfile) = 0; | |
| 1168 | |
| 1169 /* Loop, reading in the arguments. */ | |
| 1170 capacity = 256; | |
| 1171 arg->expanded = XNEWVEC (const cpp_token *, capacity); | |
| 1172 | |
| 1173 push_ptoken_context (pfile, NULL, NULL, arg->first, arg->count + 1); | |
| 1174 for (;;) | |
| 1175 { | |
| 1176 const cpp_token *token; | |
| 1177 | |
| 1178 if (arg->expanded_count + 1 >= capacity) | |
| 1179 { | |
| 1180 capacity *= 2; | |
| 1181 arg->expanded = XRESIZEVEC (const cpp_token *, arg->expanded, | |
| 1182 capacity); | |
| 1183 } | |
| 1184 | |
| 1185 token = cpp_get_token (pfile); | |
| 1186 | |
| 1187 if (token->type == CPP_EOF) | |
| 1188 break; | |
| 1189 | |
| 1190 arg->expanded[arg->expanded_count++] = token; | |
| 1191 } | |
| 1192 | |
| 1193 _cpp_pop_context (pfile); | |
| 1194 | |
| 1195 CPP_WTRADITIONAL (pfile) = saved_warn_trad; | |
| 1196 } | |
| 1197 | |
| 1198 /* Pop the current context off the stack, re-enabling the macro if the | |
| 1199 context represented a macro's replacement list. The context | |
| 1200 structure is not freed so that we can re-use it later. */ | |
| 1201 void | |
| 1202 _cpp_pop_context (cpp_reader *pfile) | |
| 1203 { | |
| 1204 cpp_context *context = pfile->context; | |
| 1205 | |
| 1206 if (context->macro) | |
| 1207 context->macro->flags &= ~NODE_DISABLED; | |
| 1208 | |
| 1209 if (context->buff) | |
| 1210 _cpp_release_buff (pfile, context->buff); | |
| 1211 | |
| 1212 pfile->context = context->prev; | |
| 1213 } | |
| 1214 | |
| 1215 /* External routine to get a token. Also used nearly everywhere | |
| 1216 internally, except for places where we know we can safely call | |
| 1217 _cpp_lex_token directly, such as lexing a directive name. | |
| 1218 | |
| 1219 Macro expansions and directives are transparently handled, | |
| 1220 including entering included files. Thus tokens are post-macro | |
| 1221 expansion, and after any intervening directives. External callers | |
| 1222 see CPP_EOF only at EOF. Internal callers also see it when meeting | |
| 1223 a directive inside a macro call, when at the end of a directive and | |
| 1224 state.in_directive is still 1, and at the end of argument | |
| 1225 pre-expansion. */ | |
| 1226 const cpp_token * | |
| 1227 cpp_get_token (cpp_reader *pfile) | |
| 1228 { | |
| 1229 const cpp_token *result; | |
| 1230 bool can_set = pfile->set_invocation_location; | |
| 1231 pfile->set_invocation_location = false; | |
| 1232 | |
| 1233 for (;;) | |
| 1234 { | |
| 1235 cpp_hashnode *node; | |
| 1236 cpp_context *context = pfile->context; | |
| 1237 | |
| 1238 /* Context->prev == 0 <=> base context. */ | |
| 1239 if (!context->prev) | |
| 1240 result = _cpp_lex_token (pfile); | |
| 1241 else if (FIRST (context).token != LAST (context).token) | |
| 1242 { | |
| 1243 if (context->direct_p) | |
| 1244 result = FIRST (context).token++; | |
| 1245 else | |
| 1246 result = *FIRST (context).ptoken++; | |
| 1247 | |
| 1248 if (result->flags & PASTE_LEFT) | |
| 1249 { | |
| 1250 paste_all_tokens (pfile, result); | |
| 1251 if (pfile->state.in_directive) | |
| 1252 continue; | |
| 1253 return padding_token (pfile, result); | |
| 1254 } | |
| 1255 } | |
| 1256 else | |
| 1257 { | |
| 1258 _cpp_pop_context (pfile); | |
| 1259 if (pfile->state.in_directive) | |
| 1260 continue; | |
| 1261 return &pfile->avoid_paste; | |
| 1262 } | |
| 1263 | |
| 1264 if (pfile->state.in_directive && result->type == CPP_COMMENT) | |
| 1265 continue; | |
| 1266 | |
| 1267 if (result->type != CPP_NAME) | |
| 1268 break; | |
| 1269 | |
|
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1270 node = result->val.node.node; |
| 0 | 1271 |
| 1272 if (node->type != NT_MACRO || (result->flags & NO_EXPAND)) | |
| 1273 break; | |
| 1274 | |
| 1275 if (!(node->flags & NODE_DISABLED)) | |
| 1276 { | |
| 1277 int ret = 0; | |
| 1278 /* If not in a macro context, and we're going to start an | |
| 1279 expansion, record the location. */ | |
| 1280 if (can_set && !context->macro) | |
| 1281 pfile->invocation_location = result->src_loc; | |
| 1282 if (pfile->state.prevent_expansion) | |
| 1283 break; | |
| 1284 | |
| 1285 /* Conditional macros require that a predicate be evaluated | |
| 1286 first. */ | |
| 1287 if ((node->flags & NODE_CONDITIONAL) != 0) | |
| 1288 { | |
| 1289 if (pfile->cb.macro_to_expand) | |
| 1290 { | |
| 1291 bool whitespace_after; | |
| 1292 const cpp_token *peek_tok = cpp_peek_token (pfile, 0); | |
| 1293 | |
| 1294 whitespace_after = (peek_tok->type == CPP_PADDING | |
| 1295 || (peek_tok->flags & PREV_WHITE)); | |
| 1296 node = pfile->cb.macro_to_expand (pfile, result); | |
| 1297 if (node) | |
| 1298 ret = enter_macro_context (pfile, node, result); | |
| 1299 else if (whitespace_after) | |
| 1300 { | |
| 1301 /* If macro_to_expand hook returned NULL and it | |
| 1302 ate some tokens, see if we don't need to add | |
| 1303 a padding token in between this and the | |
| 1304 next token. */ | |
| 1305 peek_tok = cpp_peek_token (pfile, 0); | |
| 1306 if (peek_tok->type != CPP_PADDING | |
| 1307 && (peek_tok->flags & PREV_WHITE) == 0) | |
| 1308 _cpp_push_token_context (pfile, NULL, | |
| 1309 padding_token (pfile, | |
| 1310 peek_tok), 1); | |
| 1311 } | |
| 1312 } | |
| 1313 } | |
| 1314 else | |
| 1315 ret = enter_macro_context (pfile, node, result); | |
| 1316 if (ret) | |
| 1317 { | |
| 1318 if (pfile->state.in_directive || ret == 2) | |
| 1319 continue; | |
| 1320 return padding_token (pfile, result); | |
| 1321 } | |
| 1322 } | |
| 1323 else | |
| 1324 { | |
| 1325 /* Flag this token as always unexpandable. FIXME: move this | |
| 1326 to collect_args()?. */ | |
| 1327 cpp_token *t = _cpp_temp_token (pfile); | |
| 1328 t->type = result->type; | |
| 1329 t->flags = result->flags | NO_EXPAND; | |
| 1330 t->val = result->val; | |
| 1331 result = t; | |
| 1332 } | |
| 1333 | |
| 1334 break; | |
| 1335 } | |
| 1336 | |
| 1337 return result; | |
| 1338 } | |
| 1339 | |
| 1340 /* Like cpp_get_token, but also returns a location separate from the | |
| 1341 one provided by the returned token. LOC is an out parameter; *LOC | |
| 1342 is set to the location "as expected by the user". This matters | |
| 1343 when a token results from macro expansion -- the token's location | |
| 1344 will indicate where the macro is defined, but *LOC will be the | |
| 1345 location of the start of the expansion. */ | |
| 1346 const cpp_token * | |
| 1347 cpp_get_token_with_location (cpp_reader *pfile, source_location *loc) | |
| 1348 { | |
| 1349 const cpp_token *result; | |
| 1350 | |
| 1351 pfile->set_invocation_location = true; | |
| 1352 result = cpp_get_token (pfile); | |
| 1353 if (pfile->context->macro) | |
| 1354 *loc = pfile->invocation_location; | |
| 1355 else | |
| 1356 *loc = result->src_loc; | |
| 1357 | |
| 1358 return result; | |
| 1359 } | |
| 1360 | |
| 1361 /* Returns true if we're expanding an object-like macro that was | |
| 1362 defined in a system header. Just checks the macro at the top of | |
| 1363 the stack. Used for diagnostic suppression. */ | |
| 1364 int | |
| 1365 cpp_sys_macro_p (cpp_reader *pfile) | |
| 1366 { | |
| 1367 cpp_hashnode *node = pfile->context->macro; | |
| 1368 | |
| 1369 return node && node->value.macro && node->value.macro->syshdr; | |
| 1370 } | |
| 1371 | |
| 1372 /* Read each token in, until end of the current file. Directives are | |
| 1373 transparently processed. */ | |
| 1374 void | |
| 1375 cpp_scan_nooutput (cpp_reader *pfile) | |
| 1376 { | |
| 1377 /* Request a CPP_EOF token at the end of this file, rather than | |
| 1378 transparently continuing with the including file. */ | |
| 1379 pfile->buffer->return_at_eof = true; | |
| 1380 | |
| 1381 pfile->state.discarding_output++; | |
| 1382 pfile->state.prevent_expansion++; | |
| 1383 | |
| 1384 if (CPP_OPTION (pfile, traditional)) | |
| 1385 while (_cpp_read_logical_line_trad (pfile)) | |
| 1386 ; | |
| 1387 else | |
| 1388 while (cpp_get_token (pfile)->type != CPP_EOF) | |
| 1389 ; | |
| 1390 | |
| 1391 pfile->state.discarding_output--; | |
| 1392 pfile->state.prevent_expansion--; | |
| 1393 } | |
| 1394 | |
| 1395 /* Step back one or more tokens obtained from the lexer. */ | |
| 1396 void | |
| 1397 _cpp_backup_tokens_direct (cpp_reader *pfile, unsigned int count) | |
| 1398 { | |
| 1399 pfile->lookaheads += count; | |
| 1400 while (count--) | |
| 1401 { | |
| 1402 pfile->cur_token--; | |
| 1403 if (pfile->cur_token == pfile->cur_run->base | |
| 1404 /* Possible with -fpreprocessed and no leading #line. */ | |
| 1405 && pfile->cur_run->prev != NULL) | |
| 1406 { | |
| 1407 pfile->cur_run = pfile->cur_run->prev; | |
| 1408 pfile->cur_token = pfile->cur_run->limit; | |
| 1409 } | |
| 1410 } | |
| 1411 } | |
| 1412 | |
| 1413 /* Step back one (or more) tokens. Can only step back more than 1 if | |
| 1414 they are from the lexer, and not from macro expansion. */ | |
| 1415 void | |
| 1416 _cpp_backup_tokens (cpp_reader *pfile, unsigned int count) | |
| 1417 { | |
| 1418 if (pfile->context->prev == NULL) | |
| 1419 _cpp_backup_tokens_direct (pfile, count); | |
| 1420 else | |
| 1421 { | |
| 1422 if (count != 1) | |
| 1423 abort (); | |
| 1424 if (pfile->context->direct_p) | |
| 1425 FIRST (pfile->context).token--; | |
| 1426 else | |
| 1427 FIRST (pfile->context).ptoken--; | |
| 1428 } | |
| 1429 } | |
| 1430 | |
| 1431 /* #define directive parsing and handling. */ | |
| 1432 | |
| 1433 /* Returns nonzero if a macro redefinition warning is required. */ | |
| 1434 static bool | |
|
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1435 warn_of_redefinition (cpp_reader *pfile, cpp_hashnode *node, |
| 0 | 1436 const cpp_macro *macro2) |
| 1437 { | |
| 1438 const cpp_macro *macro1; | |
| 1439 unsigned int i; | |
| 1440 | |
| 1441 /* Some redefinitions need to be warned about regardless. */ | |
| 1442 if (node->flags & NODE_WARN) | |
| 1443 return true; | |
| 1444 | |
| 1445 /* Suppress warnings for builtins that lack the NODE_WARN flag. */ | |
| 1446 if (node->flags & NODE_BUILTIN) | |
|
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1447 { |
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1448 if (!pfile->cb.user_builtin_macro |
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1449 || !pfile->cb.user_builtin_macro (pfile, node)) |
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1450 return false; |
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1451 } |
| 0 | 1452 |
| 1453 /* Redefinitions of conditional (context-sensitive) macros, on | |
| 1454 the other hand, must be allowed silently. */ | |
| 1455 if (node->flags & NODE_CONDITIONAL) | |
| 1456 return false; | |
| 1457 | |
| 1458 /* Redefinition of a macro is allowed if and only if the old and new | |
| 1459 definitions are the same. (6.10.3 paragraph 2). */ | |
| 1460 macro1 = node->value.macro; | |
| 1461 | |
| 1462 /* Don't check count here as it can be different in valid | |
| 1463 traditional redefinitions with just whitespace differences. */ | |
| 1464 if (macro1->paramc != macro2->paramc | |
| 1465 || macro1->fun_like != macro2->fun_like | |
| 1466 || macro1->variadic != macro2->variadic) | |
| 1467 return true; | |
| 1468 | |
| 1469 /* Check parameter spellings. */ | |
| 1470 for (i = 0; i < macro1->paramc; i++) | |
| 1471 if (macro1->params[i] != macro2->params[i]) | |
| 1472 return true; | |
| 1473 | |
| 1474 /* Check the replacement text or tokens. */ | |
| 1475 if (CPP_OPTION (pfile, traditional)) | |
| 1476 return _cpp_expansions_different_trad (macro1, macro2); | |
| 1477 | |
| 1478 if (macro1->count != macro2->count) | |
| 1479 return true; | |
| 1480 | |
| 1481 for (i = 0; i < macro1->count; i++) | |
| 1482 if (!_cpp_equiv_tokens (¯o1->exp.tokens[i], ¯o2->exp.tokens[i])) | |
| 1483 return true; | |
| 1484 | |
| 1485 return false; | |
| 1486 } | |
| 1487 | |
| 1488 /* Free the definition of hashnode H. */ | |
| 1489 void | |
| 1490 _cpp_free_definition (cpp_hashnode *h) | |
| 1491 { | |
| 1492 /* Macros and assertions no longer have anything to free. */ | |
| 1493 h->type = NT_VOID; | |
| 1494 /* Clear builtin flag in case of redefinition. */ | |
| 1495 h->flags &= ~(NODE_BUILTIN | NODE_DISABLED | NODE_USED); | |
| 1496 } | |
| 1497 | |
| 1498 /* Save parameter NODE to the parameter list of macro MACRO. Returns | |
| 1499 zero on success, nonzero if the parameter is a duplicate. */ | |
| 1500 bool | |
| 1501 _cpp_save_parameter (cpp_reader *pfile, cpp_macro *macro, cpp_hashnode *node) | |
| 1502 { | |
| 1503 unsigned int len; | |
| 1504 /* Constraint 6.10.3.6 - duplicate parameter names. */ | |
| 1505 if (node->flags & NODE_MACRO_ARG) | |
| 1506 { | |
| 1507 cpp_error (pfile, CPP_DL_ERROR, "duplicate macro parameter \"%s\"", | |
| 1508 NODE_NAME (node)); | |
| 1509 return true; | |
| 1510 } | |
| 1511 | |
| 1512 if (BUFF_ROOM (pfile->a_buff) | |
| 1513 < (macro->paramc + 1) * sizeof (cpp_hashnode *)) | |
| 1514 _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (cpp_hashnode *)); | |
| 1515 | |
| 1516 ((cpp_hashnode **) BUFF_FRONT (pfile->a_buff))[macro->paramc++] = node; | |
| 1517 node->flags |= NODE_MACRO_ARG; | |
| 1518 len = macro->paramc * sizeof (union _cpp_hashnode_value); | |
| 1519 if (len > pfile->macro_buffer_len) | |
| 1520 { | |
| 1521 pfile->macro_buffer = XRESIZEVEC (unsigned char, pfile->macro_buffer, | |
| 1522 len); | |
| 1523 pfile->macro_buffer_len = len; | |
| 1524 } | |
| 1525 ((union _cpp_hashnode_value *) pfile->macro_buffer)[macro->paramc - 1] | |
| 1526 = node->value; | |
| 1527 | |
| 1528 node->value.arg_index = macro->paramc; | |
| 1529 return false; | |
| 1530 } | |
| 1531 | |
| 1532 /* Check the syntax of the parameters in a MACRO definition. Returns | |
| 1533 false if an error occurs. */ | |
| 1534 static bool | |
| 1535 parse_params (cpp_reader *pfile, cpp_macro *macro) | |
| 1536 { | |
| 1537 unsigned int prev_ident = 0; | |
| 1538 | |
| 1539 for (;;) | |
| 1540 { | |
| 1541 const cpp_token *token = _cpp_lex_token (pfile); | |
| 1542 | |
| 1543 switch (token->type) | |
| 1544 { | |
| 1545 default: | |
| 1546 /* Allow/ignore comments in parameter lists if we are | |
| 1547 preserving comments in macro expansions. */ | |
| 1548 if (token->type == CPP_COMMENT | |
| 1549 && ! CPP_OPTION (pfile, discard_comments_in_macro_exp)) | |
| 1550 continue; | |
| 1551 | |
| 1552 cpp_error (pfile, CPP_DL_ERROR, | |
| 1553 "\"%s\" may not appear in macro parameter list", | |
| 1554 cpp_token_as_text (pfile, token)); | |
| 1555 return false; | |
| 1556 | |
| 1557 case CPP_NAME: | |
| 1558 if (prev_ident) | |
| 1559 { | |
| 1560 cpp_error (pfile, CPP_DL_ERROR, | |
| 1561 "macro parameters must be comma-separated"); | |
| 1562 return false; | |
| 1563 } | |
| 1564 prev_ident = 1; | |
| 1565 | |
|
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1566 if (_cpp_save_parameter (pfile, macro, token->val.node.node)) |
| 0 | 1567 return false; |
| 1568 continue; | |
| 1569 | |
| 1570 case CPP_CLOSE_PAREN: | |
| 1571 if (prev_ident || macro->paramc == 0) | |
| 1572 return true; | |
| 1573 | |
| 1574 /* Fall through to pick up the error. */ | |
| 1575 case CPP_COMMA: | |
| 1576 if (!prev_ident) | |
| 1577 { | |
| 1578 cpp_error (pfile, CPP_DL_ERROR, "parameter name missing"); | |
| 1579 return false; | |
| 1580 } | |
| 1581 prev_ident = 0; | |
| 1582 continue; | |
| 1583 | |
| 1584 case CPP_ELLIPSIS: | |
| 1585 macro->variadic = 1; | |
| 1586 if (!prev_ident) | |
| 1587 { | |
| 1588 _cpp_save_parameter (pfile, macro, | |
| 1589 pfile->spec_nodes.n__VA_ARGS__); | |
| 1590 pfile->state.va_args_ok = 1; | |
| 1591 if (! CPP_OPTION (pfile, c99) | |
|
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1592 && CPP_OPTION (pfile, cpp_pedantic) |
| 0 | 1593 && CPP_OPTION (pfile, warn_variadic_macros)) |
|
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1594 cpp_pedwarning |
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1595 (pfile, CPP_W_VARIADIC_MACROS, |
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1596 "anonymous variadic macros were introduced in C99"); |
| 0 | 1597 } |
|
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1598 else if (CPP_OPTION (pfile, cpp_pedantic) |
| 0 | 1599 && CPP_OPTION (pfile, warn_variadic_macros)) |
|
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1600 cpp_pedwarning (pfile, CPP_W_VARIADIC_MACROS, |
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1601 "ISO C does not permit named variadic macros"); |
| 0 | 1602 |
| 1603 /* We're at the end, and just expect a closing parenthesis. */ | |
| 1604 token = _cpp_lex_token (pfile); | |
| 1605 if (token->type == CPP_CLOSE_PAREN) | |
| 1606 return true; | |
| 1607 /* Fall through. */ | |
| 1608 | |
| 1609 case CPP_EOF: | |
| 1610 cpp_error (pfile, CPP_DL_ERROR, "missing ')' in macro parameter list"); | |
| 1611 return false; | |
| 1612 } | |
| 1613 } | |
| 1614 } | |
| 1615 | |
| 1616 /* Allocate room for a token from a macro's replacement list. */ | |
| 1617 static cpp_token * | |
| 1618 alloc_expansion_token (cpp_reader *pfile, cpp_macro *macro) | |
| 1619 { | |
| 1620 if (BUFF_ROOM (pfile->a_buff) < (macro->count + 1) * sizeof (cpp_token)) | |
| 1621 _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (cpp_token)); | |
| 1622 | |
| 1623 return &((cpp_token *) BUFF_FRONT (pfile->a_buff))[macro->count++]; | |
| 1624 } | |
| 1625 | |
| 1626 /* Lex a token from the expansion of MACRO, but mark parameters as we | |
| 1627 find them and warn of traditional stringification. */ | |
| 1628 static cpp_token * | |
| 1629 lex_expansion_token (cpp_reader *pfile, cpp_macro *macro) | |
| 1630 { | |
| 1631 cpp_token *token, *saved_cur_token; | |
| 1632 | |
| 1633 saved_cur_token = pfile->cur_token; | |
| 1634 pfile->cur_token = alloc_expansion_token (pfile, macro); | |
| 1635 token = _cpp_lex_direct (pfile); | |
| 1636 pfile->cur_token = saved_cur_token; | |
| 1637 | |
| 1638 /* Is this a parameter? */ | |
| 1639 if (token->type == CPP_NAME | |
|
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1640 && (token->val.node.node->flags & NODE_MACRO_ARG) != 0) |
| 0 | 1641 { |
| 1642 token->type = CPP_MACRO_ARG; | |
|
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1643 token->val.macro_arg.arg_no = token->val.node.node->value.arg_index; |
| 0 | 1644 } |
| 1645 else if (CPP_WTRADITIONAL (pfile) && macro->paramc > 0 | |
| 1646 && (token->type == CPP_STRING || token->type == CPP_CHAR)) | |
| 1647 check_trad_stringification (pfile, macro, &token->val.str); | |
| 1648 | |
| 1649 return token; | |
| 1650 } | |
| 1651 | |
| 1652 static bool | |
| 1653 create_iso_definition (cpp_reader *pfile, cpp_macro *macro) | |
| 1654 { | |
| 1655 cpp_token *token; | |
| 1656 const cpp_token *ctoken; | |
| 1657 bool following_paste_op = false; | |
| 1658 const char *paste_op_error_msg = | |
| 1659 N_("'##' cannot appear at either end of a macro expansion"); | |
|
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1660 unsigned int num_extra_tokens = 0; |
| 0 | 1661 |
| 1662 /* Get the first token of the expansion (or the '(' of a | |
| 1663 function-like macro). */ | |
| 1664 ctoken = _cpp_lex_token (pfile); | |
| 1665 | |
| 1666 if (ctoken->type == CPP_OPEN_PAREN && !(ctoken->flags & PREV_WHITE)) | |
| 1667 { | |
| 1668 bool ok = parse_params (pfile, macro); | |
| 1669 macro->params = (cpp_hashnode **) BUFF_FRONT (pfile->a_buff); | |
| 1670 if (!ok) | |
| 1671 return false; | |
| 1672 | |
| 1673 /* Success. Commit or allocate the parameter array. */ | |
| 1674 if (pfile->hash_table->alloc_subobject) | |
| 1675 { | |
| 1676 cpp_hashnode **params = | |
| 1677 (cpp_hashnode **) pfile->hash_table->alloc_subobject | |
| 1678 (sizeof (cpp_hashnode *) * macro->paramc); | |
| 1679 memcpy (params, macro->params, | |
| 1680 sizeof (cpp_hashnode *) * macro->paramc); | |
| 1681 macro->params = params; | |
| 1682 } | |
| 1683 else | |
| 1684 BUFF_FRONT (pfile->a_buff) = (uchar *) ¯o->params[macro->paramc]; | |
| 1685 macro->fun_like = 1; | |
| 1686 } | |
| 1687 else if (ctoken->type != CPP_EOF && !(ctoken->flags & PREV_WHITE)) | |
| 1688 { | |
| 1689 /* While ISO C99 requires whitespace before replacement text | |
| 1690 in a macro definition, ISO C90 with TC1 allows there characters | |
| 1691 from the basic source character set. */ | |
| 1692 if (CPP_OPTION (pfile, c99)) | |
| 1693 cpp_error (pfile, CPP_DL_PEDWARN, | |
| 1694 "ISO C99 requires whitespace after the macro name"); | |
| 1695 else | |
| 1696 { | |
| 1697 int warntype = CPP_DL_WARNING; | |
| 1698 switch (ctoken->type) | |
| 1699 { | |
| 1700 case CPP_ATSIGN: | |
| 1701 case CPP_AT_NAME: | |
| 1702 case CPP_OBJC_STRING: | |
| 1703 /* '@' is not in basic character set. */ | |
| 1704 warntype = CPP_DL_PEDWARN; | |
| 1705 break; | |
| 1706 case CPP_OTHER: | |
| 1707 /* Basic character set sans letters, digits and _. */ | |
| 1708 if (strchr ("!\"#%&'()*+,-./:;<=>?[\\]^{|}~", | |
| 1709 ctoken->val.str.text[0]) == NULL) | |
| 1710 warntype = CPP_DL_PEDWARN; | |
| 1711 break; | |
| 1712 default: | |
| 1713 /* All other tokens start with a character from basic | |
| 1714 character set. */ | |
| 1715 break; | |
| 1716 } | |
| 1717 cpp_error (pfile, warntype, | |
| 1718 "missing whitespace after the macro name"); | |
| 1719 } | |
| 1720 } | |
| 1721 | |
| 1722 if (macro->fun_like) | |
| 1723 token = lex_expansion_token (pfile, macro); | |
| 1724 else | |
| 1725 { | |
| 1726 token = alloc_expansion_token (pfile, macro); | |
| 1727 *token = *ctoken; | |
| 1728 } | |
| 1729 | |
| 1730 for (;;) | |
| 1731 { | |
| 1732 /* Check the stringifying # constraint 6.10.3.2.1 of | |
| 1733 function-like macros when lexing the subsequent token. */ | |
| 1734 if (macro->count > 1 && token[-1].type == CPP_HASH && macro->fun_like) | |
| 1735 { | |
| 1736 if (token->type == CPP_MACRO_ARG) | |
| 1737 { | |
|
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1738 if (token->flags & PREV_WHITE) |
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1739 token->flags |= SP_PREV_WHITE; |
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1740 if (token[-1].flags & DIGRAPH) |
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1741 token->flags |= SP_DIGRAPH; |
| 0 | 1742 token->flags &= ~PREV_WHITE; |
| 1743 token->flags |= STRINGIFY_ARG; | |
| 1744 token->flags |= token[-1].flags & PREV_WHITE; | |
| 1745 token[-1] = token[0]; | |
| 1746 macro->count--; | |
| 1747 } | |
| 1748 /* Let assembler get away with murder. */ | |
| 1749 else if (CPP_OPTION (pfile, lang) != CLK_ASM) | |
| 1750 { | |
| 1751 cpp_error (pfile, CPP_DL_ERROR, | |
| 1752 "'#' is not followed by a macro parameter"); | |
| 1753 return false; | |
| 1754 } | |
| 1755 } | |
| 1756 | |
| 1757 if (token->type == CPP_EOF) | |
| 1758 { | |
| 1759 /* Paste operator constraint 6.10.3.3.1: | |
| 1760 Token-paste ##, can appear in both object-like and | |
| 1761 function-like macros, but not at the end. */ | |
| 1762 if (following_paste_op) | |
| 1763 { | |
| 1764 cpp_error (pfile, CPP_DL_ERROR, paste_op_error_msg); | |
| 1765 return false; | |
| 1766 } | |
| 1767 break; | |
| 1768 } | |
| 1769 | |
| 1770 /* Paste operator constraint 6.10.3.3.1. */ | |
| 1771 if (token->type == CPP_PASTE) | |
| 1772 { | |
| 1773 /* Token-paste ##, can appear in both object-like and | |
| 1774 function-like macros, but not at the beginning. */ | |
| 1775 if (macro->count == 1) | |
| 1776 { | |
| 1777 cpp_error (pfile, CPP_DL_ERROR, paste_op_error_msg); | |
| 1778 return false; | |
| 1779 } | |
| 1780 | |
|
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1781 if (token[-1].flags & PASTE_LEFT) |
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1782 { |
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1783 macro->extra_tokens = 1; |
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1784 num_extra_tokens++; |
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1785 token->val.token_no = macro->count - 1; |
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1786 } |
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1787 else |
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1788 { |
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1789 --macro->count; |
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1790 token[-1].flags |= PASTE_LEFT; |
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1791 if (token->flags & DIGRAPH) |
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1792 token[-1].flags |= SP_DIGRAPH; |
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1793 if (token->flags & PREV_WHITE) |
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1794 token[-1].flags |= SP_PREV_WHITE; |
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1795 } |
| 0 | 1796 } |
| 1797 | |
| 1798 following_paste_op = (token->type == CPP_PASTE); | |
| 1799 token = lex_expansion_token (pfile, macro); | |
| 1800 } | |
| 1801 | |
| 1802 macro->exp.tokens = (cpp_token *) BUFF_FRONT (pfile->a_buff); | |
| 1803 macro->traditional = 0; | |
| 1804 | |
| 1805 /* Don't count the CPP_EOF. */ | |
| 1806 macro->count--; | |
| 1807 | |
| 1808 /* Clear whitespace on first token for warn_of_redefinition(). */ | |
| 1809 if (macro->count) | |
| 1810 macro->exp.tokens[0].flags &= ~PREV_WHITE; | |
| 1811 | |
| 1812 /* Commit or allocate the memory. */ | |
| 1813 if (pfile->hash_table->alloc_subobject) | |
| 1814 { | |
| 1815 cpp_token *tokns = | |
| 1816 (cpp_token *) pfile->hash_table->alloc_subobject (sizeof (cpp_token) | |
| 1817 * macro->count); | |
|
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1818 if (num_extra_tokens) |
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1819 { |
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1820 /* Place second and subsequent ## or %:%: tokens in |
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1821 sequences of consecutive such tokens at the end of the |
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1822 list to preserve information about where they appear, how |
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1823 they are spelt and whether they are preceded by |
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1824 whitespace without otherwise interfering with macro |
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1825 expansion. */ |
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1826 cpp_token *normal_dest = tokns; |
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1827 cpp_token *extra_dest = tokns + macro->count - num_extra_tokens; |
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1828 unsigned int i; |
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1829 for (i = 0; i < macro->count; i++) |
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1830 { |
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1831 if (macro->exp.tokens[i].type == CPP_PASTE) |
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1832 *extra_dest++ = macro->exp.tokens[i]; |
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1833 else |
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1834 *normal_dest++ = macro->exp.tokens[i]; |
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1835 } |
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1836 } |
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1837 else |
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1838 memcpy (tokns, macro->exp.tokens, sizeof (cpp_token) * macro->count); |
| 0 | 1839 macro->exp.tokens = tokns; |
| 1840 } | |
| 1841 else | |
| 1842 BUFF_FRONT (pfile->a_buff) = (uchar *) ¯o->exp.tokens[macro->count]; | |
| 1843 | |
| 1844 return true; | |
| 1845 } | |
| 1846 | |
| 1847 /* Parse a macro and save its expansion. Returns nonzero on success. */ | |
| 1848 bool | |
| 1849 _cpp_create_definition (cpp_reader *pfile, cpp_hashnode *node) | |
| 1850 { | |
| 1851 cpp_macro *macro; | |
| 1852 unsigned int i; | |
| 1853 bool ok; | |
| 1854 | |
| 1855 if (pfile->hash_table->alloc_subobject) | |
| 1856 macro = (cpp_macro *) pfile->hash_table->alloc_subobject | |
| 1857 (sizeof (cpp_macro)); | |
| 1858 else | |
| 1859 macro = (cpp_macro *) _cpp_aligned_alloc (pfile, sizeof (cpp_macro)); | |
| 1860 macro->line = pfile->directive_line; | |
| 1861 macro->params = 0; | |
| 1862 macro->paramc = 0; | |
| 1863 macro->variadic = 0; | |
| 1864 macro->used = !CPP_OPTION (pfile, warn_unused_macros); | |
| 1865 macro->count = 0; | |
| 1866 macro->fun_like = 0; | |
|
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1867 macro->extra_tokens = 0; |
| 0 | 1868 /* To suppress some diagnostics. */ |
| 1869 macro->syshdr = pfile->buffer && pfile->buffer->sysp != 0; | |
| 1870 | |
| 1871 if (CPP_OPTION (pfile, traditional)) | |
| 1872 ok = _cpp_create_trad_definition (pfile, macro); | |
| 1873 else | |
| 1874 { | |
| 1875 ok = create_iso_definition (pfile, macro); | |
| 1876 | |
| 1877 /* We set the type for SEEN_EOL() in directives.c. | |
| 1878 | |
| 1879 Longer term we should lex the whole line before coming here, | |
| 1880 and just copy the expansion. */ | |
| 1881 | |
| 1882 /* Stop the lexer accepting __VA_ARGS__. */ | |
| 1883 pfile->state.va_args_ok = 0; | |
| 1884 } | |
| 1885 | |
| 1886 /* Clear the fast argument lookup indices. */ | |
| 1887 for (i = macro->paramc; i-- > 0; ) | |
| 1888 { | |
| 1889 struct cpp_hashnode *node = macro->params[i]; | |
| 1890 node->flags &= ~ NODE_MACRO_ARG; | |
| 1891 node->value = ((union _cpp_hashnode_value *) pfile->macro_buffer)[i]; | |
| 1892 } | |
| 1893 | |
| 1894 if (!ok) | |
| 1895 return ok; | |
| 1896 | |
| 1897 if (node->type == NT_MACRO) | |
| 1898 { | |
| 1899 if (CPP_OPTION (pfile, warn_unused_macros)) | |
| 1900 _cpp_warn_if_unused_macro (pfile, node, NULL); | |
| 1901 | |
| 1902 if (warn_of_redefinition (pfile, node, macro)) | |
| 1903 { | |
|
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1904 const int reason = (node->flags & NODE_BUILTIN) |
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1905 ? CPP_W_BUILTIN_MACRO_REDEFINED : CPP_W_NONE; |
|
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1906 bool warned; |
|
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1907 |
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1908 warned = cpp_pedwarning_with_line (pfile, reason, |
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1909 pfile->directive_line, 0, |
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1910 "\"%s\" redefined", |
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1911 NODE_NAME (node)); |
| 0 | 1912 |
|
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1913 if (warned && node->type == NT_MACRO && !(node->flags & NODE_BUILTIN)) |
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1914 cpp_error_with_line (pfile, CPP_DL_NOTE, |
| 0 | 1915 node->value.macro->line, 0, |
| 1916 "this is the location of the previous definition"); | |
| 1917 } | |
| 1918 } | |
| 1919 | |
| 1920 if (node->type != NT_VOID) | |
| 1921 _cpp_free_definition (node); | |
| 1922 | |
| 1923 /* Enter definition in hash table. */ | |
| 1924 node->type = NT_MACRO; | |
| 1925 node->value.macro = macro; | |
| 1926 if (! ustrncmp (NODE_NAME (node), DSC ("__STDC_")) | |
| 1927 && ustrcmp (NODE_NAME (node), (const uchar *) "__STDC_FORMAT_MACROS") | |
| 1928 /* __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS are mentioned | |
| 1929 in the C standard, as something that one must use in C++. | |
| 1930 However DR#593 indicates that these aren't actually mentioned | |
| 1931 in the C++ standard. We special-case them anyway. */ | |
| 1932 && ustrcmp (NODE_NAME (node), (const uchar *) "__STDC_LIMIT_MACROS") | |
| 1933 && ustrcmp (NODE_NAME (node), (const uchar *) "__STDC_CONSTANT_MACROS")) | |
| 1934 node->flags |= NODE_WARN; | |
| 1935 | |
| 1936 /* If user defines one of the conditional macros, remove the | |
| 1937 conditional flag */ | |
| 1938 node->flags &= ~NODE_CONDITIONAL; | |
| 1939 | |
| 1940 return ok; | |
| 1941 } | |
| 1942 | |
| 1943 /* Warn if a token in STRING matches one of a function-like MACRO's | |
| 1944 parameters. */ | |
| 1945 static void | |
| 1946 check_trad_stringification (cpp_reader *pfile, const cpp_macro *macro, | |
| 1947 const cpp_string *string) | |
| 1948 { | |
| 1949 unsigned int i, len; | |
| 1950 const uchar *p, *q, *limit; | |
| 1951 | |
| 1952 /* Loop over the string. */ | |
| 1953 limit = string->text + string->len - 1; | |
| 1954 for (p = string->text + 1; p < limit; p = q) | |
| 1955 { | |
| 1956 /* Find the start of an identifier. */ | |
| 1957 while (p < limit && !is_idstart (*p)) | |
| 1958 p++; | |
| 1959 | |
| 1960 /* Find the end of the identifier. */ | |
| 1961 q = p; | |
| 1962 while (q < limit && is_idchar (*q)) | |
| 1963 q++; | |
| 1964 | |
| 1965 len = q - p; | |
| 1966 | |
| 1967 /* Loop over the function macro arguments to see if the | |
| 1968 identifier inside the string matches one of them. */ | |
| 1969 for (i = 0; i < macro->paramc; i++) | |
| 1970 { | |
| 1971 const cpp_hashnode *node = macro->params[i]; | |
| 1972 | |
| 1973 if (NODE_LEN (node) == len | |
| 1974 && !memcmp (p, NODE_NAME (node), len)) | |
| 1975 { | |
| 1976 cpp_error (pfile, CPP_DL_WARNING, | |
| 1977 "macro argument \"%s\" would be stringified in traditional C", | |
| 1978 NODE_NAME (node)); | |
| 1979 break; | |
| 1980 } | |
| 1981 } | |
| 1982 } | |
| 1983 } | |
| 1984 | |
| 1985 /* Returns the name, arguments and expansion of a macro, in a format | |
| 1986 suitable to be read back in again, and therefore also for DWARF 2 | |
| 1987 debugging info. e.g. "PASTE(X, Y) X ## Y", or "MACNAME EXPANSION". | |
| 1988 Caller is expected to generate the "#define" bit if needed. The | |
| 1989 returned text is temporary, and automatically freed later. */ | |
| 1990 const unsigned char * | |
|
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1991 cpp_macro_definition (cpp_reader *pfile, cpp_hashnode *node) |
| 0 | 1992 { |
| 1993 unsigned int i, len; | |
|
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1994 const cpp_macro *macro; |
| 0 | 1995 unsigned char *buffer; |
| 1996 | |
| 1997 if (node->type != NT_MACRO || (node->flags & NODE_BUILTIN)) | |
| 1998 { | |
|
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1999 if (node->type != NT_MACRO |
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2000 || !pfile->cb.user_builtin_macro |
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2001 || !pfile->cb.user_builtin_macro (pfile, node)) |
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2002 { |
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2003 cpp_error (pfile, CPP_DL_ICE, |
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2004 "invalid hash type %d in cpp_macro_definition", |
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2005 node->type); |
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2006 return 0; |
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2007 } |
| 0 | 2008 } |
| 2009 | |
|
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2010 macro = node->value.macro; |
| 0 | 2011 /* Calculate length. */ |
| 2012 len = NODE_LEN (node) + 2; /* ' ' and NUL. */ | |
| 2013 if (macro->fun_like) | |
| 2014 { | |
| 2015 len += 4; /* "()" plus possible final ".." of named | |
| 2016 varargs (we have + 1 below). */ | |
| 2017 for (i = 0; i < macro->paramc; i++) | |
| 2018 len += NODE_LEN (macro->params[i]) + 1; /* "," */ | |
| 2019 } | |
| 2020 | |
| 2021 /* This should match below where we fill in the buffer. */ | |
| 2022 if (CPP_OPTION (pfile, traditional)) | |
| 2023 len += _cpp_replacement_text_len (macro); | |
| 2024 else | |
| 2025 { | |
|
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2026 unsigned int count = macro_real_token_count (macro); |
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2027 for (i = 0; i < count; i++) |
| 0 | 2028 { |
| 2029 cpp_token *token = ¯o->exp.tokens[i]; | |
| 2030 | |
| 2031 if (token->type == CPP_MACRO_ARG) | |
|
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2032 len += NODE_LEN (macro->params[token->val.macro_arg.arg_no - 1]); |
| 0 | 2033 else |
| 2034 len += cpp_token_len (token); | |
| 2035 | |
| 2036 if (token->flags & STRINGIFY_ARG) | |
| 2037 len++; /* "#" */ | |
| 2038 if (token->flags & PASTE_LEFT) | |
| 2039 len += 3; /* " ##" */ | |
| 2040 if (token->flags & PREV_WHITE) | |
| 2041 len++; /* " " */ | |
| 2042 } | |
| 2043 } | |
| 2044 | |
| 2045 if (len > pfile->macro_buffer_len) | |
| 2046 { | |
| 2047 pfile->macro_buffer = XRESIZEVEC (unsigned char, | |
| 2048 pfile->macro_buffer, len); | |
| 2049 pfile->macro_buffer_len = len; | |
| 2050 } | |
| 2051 | |
| 2052 /* Fill in the buffer. Start with the macro name. */ | |
| 2053 buffer = pfile->macro_buffer; | |
| 2054 memcpy (buffer, NODE_NAME (node), NODE_LEN (node)); | |
| 2055 buffer += NODE_LEN (node); | |
| 2056 | |
| 2057 /* Parameter names. */ | |
| 2058 if (macro->fun_like) | |
| 2059 { | |
| 2060 *buffer++ = '('; | |
| 2061 for (i = 0; i < macro->paramc; i++) | |
| 2062 { | |
| 2063 cpp_hashnode *param = macro->params[i]; | |
| 2064 | |
| 2065 if (param != pfile->spec_nodes.n__VA_ARGS__) | |
| 2066 { | |
| 2067 memcpy (buffer, NODE_NAME (param), NODE_LEN (param)); | |
| 2068 buffer += NODE_LEN (param); | |
| 2069 } | |
| 2070 | |
| 2071 if (i + 1 < macro->paramc) | |
| 2072 /* Don't emit a space after the comma here; we're trying | |
| 2073 to emit a Dwarf-friendly definition, and the Dwarf spec | |
| 2074 forbids spaces in the argument list. */ | |
| 2075 *buffer++ = ','; | |
| 2076 else if (macro->variadic) | |
| 2077 *buffer++ = '.', *buffer++ = '.', *buffer++ = '.'; | |
| 2078 } | |
| 2079 *buffer++ = ')'; | |
| 2080 } | |
| 2081 | |
| 2082 /* The Dwarf spec requires a space after the macro name, even if the | |
| 2083 definition is the empty string. */ | |
| 2084 *buffer++ = ' '; | |
| 2085 | |
| 2086 if (CPP_OPTION (pfile, traditional)) | |
| 2087 buffer = _cpp_copy_replacement_text (macro, buffer); | |
| 2088 else if (macro->count) | |
| 2089 /* Expansion tokens. */ | |
| 2090 { | |
|
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2091 unsigned int count = macro_real_token_count (macro); |
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2092 for (i = 0; i < count; i++) |
| 0 | 2093 { |
| 2094 cpp_token *token = ¯o->exp.tokens[i]; | |
| 2095 | |
| 2096 if (token->flags & PREV_WHITE) | |
| 2097 *buffer++ = ' '; | |
| 2098 if (token->flags & STRINGIFY_ARG) | |
| 2099 *buffer++ = '#'; | |
| 2100 | |
| 2101 if (token->type == CPP_MACRO_ARG) | |
| 2102 { | |
| 2103 memcpy (buffer, | |
|
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2104 NODE_NAME (macro->params[token->val.macro_arg.arg_no - 1]), |
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2105 NODE_LEN (macro->params[token->val.macro_arg.arg_no - 1])); |
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2106 buffer += NODE_LEN (macro->params[token->val.macro_arg.arg_no - 1]); |
| 0 | 2107 } |
| 2108 else | |
| 2109 buffer = cpp_spell_token (pfile, token, buffer, false); | |
| 2110 | |
| 2111 if (token->flags & PASTE_LEFT) | |
| 2112 { | |
| 2113 *buffer++ = ' '; | |
| 2114 *buffer++ = '#'; | |
| 2115 *buffer++ = '#'; | |
| 2116 /* Next has PREV_WHITE; see _cpp_create_definition. */ | |
| 2117 } | |
| 2118 } | |
| 2119 } | |
| 2120 | |
| 2121 *buffer = '\0'; | |
| 2122 return pfile->macro_buffer; | |
| 2123 } |