Mercurial > hg > CbC > CbC_gcc
annotate libcpp/directives.c @ 158:494b0b89df80 default tip
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| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 25 May 2020 18:13:55 +0900 |
| parents | 1830386684a0 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* CPP Library. (Directive handling.) |
| 145 | 2 Copyright (C) 1986-2020 Free Software Foundation, Inc. |
| 0 | 3 Contributed by Per Bothner, 1994-95. |
| 4 Based on CCCP program by Paul Rubin, June 1986 | |
| 5 Adapted to ANSI C, Richard Stallman, Jan 1987 | |
| 6 | |
| 7 This program is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 3, or (at your option) any | |
| 10 later version. | |
| 11 | |
| 12 This program is distributed in the hope that it will be useful, | |
| 13 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 GNU General Public License for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with this program; see the file COPYING3. If not see | |
| 19 <http://www.gnu.org/licenses/>. */ | |
| 20 | |
| 21 #include "config.h" | |
| 22 #include "system.h" | |
| 23 #include "cpplib.h" | |
| 24 #include "internal.h" | |
| 25 #include "mkdeps.h" | |
| 26 #include "obstack.h" | |
| 27 | |
| 28 /* Stack of conditionals currently in progress | |
| 29 (including both successful and failing conditionals). */ | |
| 30 struct if_stack | |
| 31 { | |
| 32 struct if_stack *next; | |
| 145 | 33 location_t line; /* Line where condition started. */ |
| 0 | 34 const cpp_hashnode *mi_cmacro;/* macro name for #ifndef around entire file */ |
| 35 bool skip_elses; /* Can future #else / #elif be skipped? */ | |
| 36 bool was_skipping; /* If were skipping on entry. */ | |
| 37 int type; /* Most recent conditional for diagnostics. */ | |
| 38 }; | |
| 39 | |
| 40 /* Contains a registered pragma or pragma namespace. */ | |
| 41 typedef void (*pragma_cb) (cpp_reader *); | |
| 42 struct pragma_entry | |
| 43 { | |
| 44 struct pragma_entry *next; | |
| 45 const cpp_hashnode *pragma; /* Name and length. */ | |
| 46 bool is_nspace; | |
| 47 bool is_internal; | |
| 48 bool is_deferred; | |
| 49 bool allow_expansion; | |
| 50 union { | |
| 51 pragma_cb handler; | |
| 52 struct pragma_entry *space; | |
| 53 unsigned int ident; | |
| 54 } u; | |
| 55 }; | |
| 56 | |
| 57 /* Values for the origin field of struct directive. KANDR directives | |
| 58 come from traditional (K&R) C. STDC89 directives come from the | |
| 59 1989 C standard. EXTENSION directives are extensions. */ | |
| 60 #define KANDR 0 | |
| 61 #define STDC89 1 | |
| 62 #define EXTENSION 2 | |
| 63 | |
| 64 /* Values for the flags field of struct directive. COND indicates a | |
| 65 conditional; IF_COND an opening conditional. INCL means to treat | |
| 66 "..." and <...> as q-char and h-char sequences respectively. IN_I | |
| 67 means this directive should be handled even if -fpreprocessed is in | |
| 68 effect (these are the directives with callback hooks). | |
| 69 | |
| 70 EXPAND is set on directives that are always macro-expanded. */ | |
| 71 #define COND (1 << 0) | |
| 72 #define IF_COND (1 << 1) | |
| 73 #define INCL (1 << 2) | |
| 74 #define IN_I (1 << 3) | |
| 75 #define EXPAND (1 << 4) | |
| 76 #define DEPRECATED (1 << 5) | |
| 77 | |
| 78 /* Defines one #-directive, including how to handle it. */ | |
| 79 typedef void (*directive_handler) (cpp_reader *); | |
| 80 typedef struct directive directive; | |
| 81 struct directive | |
| 82 { | |
| 83 directive_handler handler; /* Function to handle directive. */ | |
| 84 const uchar *name; /* Name of directive. */ | |
| 85 unsigned short length; /* Length of name. */ | |
| 86 unsigned char origin; /* Origin of directive. */ | |
| 87 unsigned char flags; /* Flags describing this directive. */ | |
| 88 }; | |
| 89 | |
| 90 /* Forward declarations. */ | |
| 91 | |
| 92 static void skip_rest_of_line (cpp_reader *); | |
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93 static void check_eol (cpp_reader *, bool); |
| 0 | 94 static void start_directive (cpp_reader *); |
| 95 static void prepare_directive_trad (cpp_reader *); | |
| 96 static void end_directive (cpp_reader *, int); | |
| 97 static void directive_diagnostics (cpp_reader *, const directive *, int); | |
| 98 static void run_directive (cpp_reader *, int, const char *, size_t); | |
| 99 static char *glue_header_name (cpp_reader *); | |
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100 static const char *parse_include (cpp_reader *, int *, const cpp_token ***, |
| 145 | 101 location_t *); |
| 0 | 102 static void push_conditional (cpp_reader *, int, int, const cpp_hashnode *); |
| 103 static unsigned int read_flag (cpp_reader *, unsigned int); | |
| 104 static bool strtolinenum (const uchar *, size_t, linenum_type *, bool *); | |
| 131 | 105 static void do_diagnostic (cpp_reader *, enum cpp_diagnostic_level code, |
| 106 enum cpp_warning_reason reason, int); | |
| 0 | 107 static cpp_hashnode *lex_macro_node (cpp_reader *, bool); |
| 108 static int undefine_macros (cpp_reader *, cpp_hashnode *, void *); | |
| 109 static void do_include_common (cpp_reader *, enum include_type); | |
| 110 static struct pragma_entry *lookup_pragma_entry (struct pragma_entry *, | |
| 111 const cpp_hashnode *); | |
| 112 static int count_registered_pragmas (struct pragma_entry *); | |
| 113 static char ** save_registered_pragmas (struct pragma_entry *, char **); | |
| 114 static char ** restore_registered_pragmas (cpp_reader *, struct pragma_entry *, | |
| 115 char **); | |
| 116 static void do_pragma_once (cpp_reader *); | |
| 117 static void do_pragma_poison (cpp_reader *); | |
| 118 static void do_pragma_system_header (cpp_reader *); | |
| 119 static void do_pragma_dependency (cpp_reader *); | |
| 111 | 120 static void do_pragma_warning_or_error (cpp_reader *, bool error); |
| 121 static void do_pragma_warning (cpp_reader *); | |
| 122 static void do_pragma_error (cpp_reader *); | |
| 0 | 123 static void do_linemarker (cpp_reader *); |
| 124 static const cpp_token *get_token_no_padding (cpp_reader *); | |
| 125 static const cpp_token *get__Pragma_string (cpp_reader *); | |
| 111 | 126 static void destringize_and_run (cpp_reader *, const cpp_string *, |
| 145 | 127 location_t); |
| 128 static bool parse_answer (cpp_reader *, int, location_t, cpp_macro **); | |
| 131 | 129 static cpp_hashnode *parse_assertion (cpp_reader *, int, cpp_macro **); |
| 130 static cpp_macro **find_answer (cpp_hashnode *, const cpp_macro *); | |
| 0 | 131 static void handle_assertion (cpp_reader *, const char *, int); |
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132 static void do_pragma_push_macro (cpp_reader *); |
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133 static void do_pragma_pop_macro (cpp_reader *); |
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134 static void cpp_pop_definition (cpp_reader *, struct def_pragma_macro *); |
| 0 | 135 |
| 145 | 136 /* This is the table of directive handlers. All extensions other than |
| 137 #warning, #include_next, and #import are deprecated. The name is | |
| 138 where the extension appears to have come from. */ | |
| 0 | 139 |
| 140 #define DIRECTIVE_TABLE \ | |
| 145 | 141 D(define, T_DEFINE = 0, KANDR, IN_I) \ |
| 142 D(include, T_INCLUDE, KANDR, INCL | EXPAND) \ | |
| 143 D(endif, T_ENDIF, KANDR, COND) \ | |
| 144 D(ifdef, T_IFDEF, KANDR, COND | IF_COND) \ | |
| 145 D(if, T_IF, KANDR, COND | IF_COND | EXPAND) \ | |
| 146 D(else, T_ELSE, KANDR, COND) \ | |
| 147 D(ifndef, T_IFNDEF, KANDR, COND | IF_COND) \ | |
| 148 D(undef, T_UNDEF, KANDR, IN_I) \ | |
| 149 D(line, T_LINE, KANDR, EXPAND) \ | |
| 150 D(elif, T_ELIF, STDC89, COND | EXPAND) \ | |
| 151 D(error, T_ERROR, STDC89, 0) \ | |
| 152 D(pragma, T_PRAGMA, STDC89, IN_I) \ | |
| 153 D(warning, T_WARNING, EXTENSION, 0) \ | |
| 154 D(include_next, T_INCLUDE_NEXT, EXTENSION, INCL | EXPAND) \ | |
| 155 D(ident, T_IDENT, EXTENSION, IN_I) \ | |
| 156 D(import, T_IMPORT, EXTENSION, INCL | EXPAND) /* ObjC */ \ | |
| 157 D(assert, T_ASSERT, EXTENSION, DEPRECATED) /* SVR4 */ \ | |
| 158 D(unassert, T_UNASSERT, EXTENSION, DEPRECATED) /* SVR4 */ \ | |
| 159 D(sccs, T_SCCS, EXTENSION, IN_I) /* SVR4? */ | |
| 0 | 160 |
| 161 /* #sccs is synonymous with #ident. */ | |
| 162 #define do_sccs do_ident | |
| 163 | |
| 164 /* Use the table to generate a series of prototypes, an enum for the | |
| 165 directive names, and an array of directive handlers. */ | |
| 166 | |
| 167 #define D(name, t, o, f) static void do_##name (cpp_reader *); | |
| 168 DIRECTIVE_TABLE | |
| 169 #undef D | |
| 170 | |
| 171 #define D(n, tag, o, f) tag, | |
| 172 enum | |
| 173 { | |
| 174 DIRECTIVE_TABLE | |
| 175 N_DIRECTIVES | |
| 176 }; | |
| 177 #undef D | |
| 178 | |
| 179 #define D(name, t, origin, flags) \ | |
| 180 { do_##name, (const uchar *) #name, \ | |
| 181 sizeof #name - 1, origin, flags }, | |
| 182 static const directive dtable[] = | |
| 183 { | |
| 184 DIRECTIVE_TABLE | |
| 185 }; | |
| 186 #undef D | |
| 111 | 187 |
| 188 /* A NULL-terminated array of directive names for use | |
| 189 when suggesting corrections for misspelled directives. */ | |
| 190 #define D(name, t, origin, flags) #name, | |
| 191 static const char * const directive_names[] = { | |
| 192 DIRECTIVE_TABLE | |
| 193 NULL | |
| 194 }; | |
| 195 #undef D | |
| 196 | |
| 0 | 197 #undef DIRECTIVE_TABLE |
| 198 | |
| 199 /* Wrapper struct directive for linemarkers. | |
| 200 The origin is more or less true - the original K+R cpp | |
| 201 did use this notation in its preprocessed output. */ | |
| 202 static const directive linemarker_dir = | |
| 203 { | |
| 204 do_linemarker, UC"#", 1, KANDR, IN_I | |
| 205 }; | |
| 206 | |
| 207 /* Skip any remaining tokens in a directive. */ | |
| 208 static void | |
| 209 skip_rest_of_line (cpp_reader *pfile) | |
| 210 { | |
| 211 /* Discard all stacked contexts. */ | |
| 212 while (pfile->context->prev) | |
| 213 _cpp_pop_context (pfile); | |
| 214 | |
| 215 /* Sweep up all tokens remaining on the line. */ | |
| 216 if (! SEEN_EOL ()) | |
| 217 while (_cpp_lex_token (pfile)->type != CPP_EOF) | |
| 218 ; | |
| 219 } | |
| 220 | |
| 111 | 221 /* Helper function for check_oel. */ |
| 222 | |
| 0 | 223 static void |
| 131 | 224 check_eol_1 (cpp_reader *pfile, bool expand, enum cpp_warning_reason reason) |
| 0 | 225 { |
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226 if (! SEEN_EOL () && (expand |
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227 ? cpp_get_token (pfile) |
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228 : _cpp_lex_token (pfile))->type != CPP_EOF) |
| 111 | 229 cpp_pedwarning (pfile, reason, "extra tokens at end of #%s directive", |
| 230 pfile->directive->name); | |
| 231 } | |
| 232 | |
| 233 /* Variant of check_eol used for Wendif-labels warnings. */ | |
| 234 | |
| 235 static void | |
| 236 check_eol_endif_labels (cpp_reader *pfile) | |
| 237 { | |
| 238 check_eol_1 (pfile, false, CPP_W_ENDIF_LABELS); | |
| 239 } | |
| 240 | |
| 241 /* Ensure there are no stray tokens at the end of a directive. If | |
| 242 EXPAND is true, tokens macro-expanding to nothing are allowed. */ | |
| 243 | |
| 244 static void | |
| 245 check_eol (cpp_reader *pfile, bool expand) | |
| 246 { | |
| 247 check_eol_1 (pfile, expand, CPP_W_NONE); | |
| 0 | 248 } |
| 249 | |
| 250 /* Ensure there are no stray tokens other than comments at the end of | |
| 251 a directive, and gather the comments. */ | |
| 252 static const cpp_token ** | |
| 253 check_eol_return_comments (cpp_reader *pfile) | |
| 254 { | |
| 255 size_t c; | |
| 256 size_t capacity = 8; | |
| 257 const cpp_token **buf; | |
| 258 | |
| 259 buf = XNEWVEC (const cpp_token *, capacity); | |
| 260 c = 0; | |
| 261 if (! SEEN_EOL ()) | |
| 262 { | |
| 263 while (1) | |
| 264 { | |
| 265 const cpp_token *tok; | |
| 266 | |
| 267 tok = _cpp_lex_token (pfile); | |
| 268 if (tok->type == CPP_EOF) | |
| 269 break; | |
| 270 if (tok->type != CPP_COMMENT) | |
| 271 cpp_error (pfile, CPP_DL_PEDWARN, | |
| 272 "extra tokens at end of #%s directive", | |
| 273 pfile->directive->name); | |
| 274 else | |
| 275 { | |
| 276 if (c + 1 >= capacity) | |
| 277 { | |
| 278 capacity *= 2; | |
| 279 buf = XRESIZEVEC (const cpp_token *, buf, capacity); | |
| 280 } | |
| 281 buf[c] = tok; | |
| 282 ++c; | |
| 283 } | |
| 284 } | |
| 285 } | |
| 286 buf[c] = NULL; | |
| 287 return buf; | |
| 288 } | |
| 289 | |
| 290 /* Called when entering a directive, _Pragma or command-line directive. */ | |
| 291 static void | |
| 292 start_directive (cpp_reader *pfile) | |
| 293 { | |
| 294 /* Setup in-directive state. */ | |
| 295 pfile->state.in_directive = 1; | |
| 296 pfile->state.save_comments = 0; | |
| 297 pfile->directive_result.type = CPP_PADDING; | |
| 298 | |
| 299 /* Some handlers need the position of the # for diagnostics. */ | |
| 300 pfile->directive_line = pfile->line_table->highest_line; | |
| 301 } | |
| 302 | |
| 303 /* Called when leaving a directive, _Pragma or command-line directive. */ | |
| 304 static void | |
| 305 end_directive (cpp_reader *pfile, int skip_line) | |
| 306 { | |
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307 if (CPP_OPTION (pfile, traditional)) |
| 0 | 308 { |
| 309 /* Revert change of prepare_directive_trad. */ | |
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310 if (!pfile->state.in_deferred_pragma) |
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311 pfile->state.prevent_expansion--; |
| 0 | 312 |
| 313 if (pfile->directive != &dtable[T_DEFINE]) | |
| 314 _cpp_remove_overlay (pfile); | |
| 315 } | |
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316 else if (pfile->state.in_deferred_pragma) |
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317 ; |
| 0 | 318 /* We don't skip for an assembler #. */ |
| 319 else if (skip_line) | |
| 320 { | |
| 321 skip_rest_of_line (pfile); | |
| 322 if (!pfile->keep_tokens) | |
| 323 { | |
| 324 pfile->cur_run = &pfile->base_run; | |
| 325 pfile->cur_token = pfile->base_run.base; | |
| 326 } | |
| 327 } | |
| 328 | |
| 329 /* Restore state. */ | |
| 330 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
| 331 pfile->state.in_directive = 0; | |
| 332 pfile->state.in_expression = 0; | |
| 333 pfile->state.angled_headers = 0; | |
| 334 pfile->directive = 0; | |
| 335 } | |
| 336 | |
| 337 /* Prepare to handle the directive in pfile->directive. */ | |
| 338 static void | |
| 339 prepare_directive_trad (cpp_reader *pfile) | |
| 340 { | |
| 341 if (pfile->directive != &dtable[T_DEFINE]) | |
| 342 { | |
| 343 bool no_expand = (pfile->directive | |
| 344 && ! (pfile->directive->flags & EXPAND)); | |
| 345 bool was_skipping = pfile->state.skipping; | |
| 346 | |
| 347 pfile->state.in_expression = (pfile->directive == &dtable[T_IF] | |
| 348 || pfile->directive == &dtable[T_ELIF]); | |
| 349 if (pfile->state.in_expression) | |
| 350 pfile->state.skipping = false; | |
| 351 | |
| 352 if (no_expand) | |
| 353 pfile->state.prevent_expansion++; | |
| 111 | 354 _cpp_scan_out_logical_line (pfile, NULL, false); |
| 0 | 355 if (no_expand) |
| 356 pfile->state.prevent_expansion--; | |
| 357 | |
| 358 pfile->state.skipping = was_skipping; | |
| 359 _cpp_overlay_buffer (pfile, pfile->out.base, | |
| 360 pfile->out.cur - pfile->out.base); | |
| 361 } | |
| 362 | |
| 363 /* Stop ISO C from expanding anything. */ | |
| 364 pfile->state.prevent_expansion++; | |
| 365 } | |
| 366 | |
| 367 /* Output diagnostics for a directive DIR. INDENTED is nonzero if | |
| 368 the '#' was indented. */ | |
| 369 static void | |
| 370 directive_diagnostics (cpp_reader *pfile, const directive *dir, int indented) | |
| 371 { | |
| 372 /* Issue -pedantic or deprecated warnings for extensions. We let | |
| 373 -pedantic take precedence if both are applicable. */ | |
| 374 if (! pfile->state.skipping) | |
| 375 { | |
| 376 if (dir->origin == EXTENSION | |
| 377 && !(dir == &dtable[T_IMPORT] && CPP_OPTION (pfile, objc)) | |
| 378 && CPP_PEDANTIC (pfile)) | |
| 379 cpp_error (pfile, CPP_DL_PEDWARN, "#%s is a GCC extension", dir->name); | |
| 380 else if (((dir->flags & DEPRECATED) != 0 | |
| 381 || (dir == &dtable[T_IMPORT] && !CPP_OPTION (pfile, objc))) | |
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382 && CPP_OPTION (pfile, cpp_warn_deprecated)) |
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383 cpp_warning (pfile, CPP_W_DEPRECATED, |
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384 "#%s is a deprecated GCC extension", dir->name); |
| 0 | 385 } |
| 386 | |
| 387 /* Traditionally, a directive is ignored unless its # is in | |
| 388 column 1. Therefore in code intended to work with K+R | |
| 389 compilers, directives added by C89 must have their # | |
| 390 indented, and directives present in traditional C must not. | |
| 391 This is true even of directives in skipped conditional | |
| 392 blocks. #elif cannot be used at all. */ | |
| 393 if (CPP_WTRADITIONAL (pfile)) | |
| 394 { | |
| 395 if (dir == &dtable[T_ELIF]) | |
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396 cpp_warning (pfile, CPP_W_TRADITIONAL, |
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397 "suggest not using #elif in traditional C"); |
| 0 | 398 else if (indented && dir->origin == KANDR) |
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399 cpp_warning (pfile, CPP_W_TRADITIONAL, |
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400 "traditional C ignores #%s with the # indented", |
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401 dir->name); |
| 0 | 402 else if (!indented && dir->origin != KANDR) |
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403 cpp_warning (pfile, CPP_W_TRADITIONAL, |
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404 "suggest hiding #%s from traditional C with an indented #", |
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405 dir->name); |
| 0 | 406 } |
| 407 } | |
| 408 | |
| 145 | 409 /* Check if we have a known directive. INDENTED is true if the |
| 0 | 410 '#' of the directive was indented. This function is in this file |
| 411 to save unnecessarily exporting dtable etc. to lex.c. Returns | |
| 412 nonzero if the line of tokens has been handled, zero if we should | |
| 413 continue processing the line. */ | |
| 414 int | |
| 145 | 415 _cpp_handle_directive (cpp_reader *pfile, bool indented) |
| 0 | 416 { |
| 417 const directive *dir = 0; | |
| 418 const cpp_token *dname; | |
| 419 bool was_parsing_args = pfile->state.parsing_args; | |
| 420 bool was_discarding_output = pfile->state.discarding_output; | |
| 421 int skip = 1; | |
| 422 | |
| 423 if (was_discarding_output) | |
| 424 pfile->state.prevent_expansion = 0; | |
| 425 | |
| 426 if (was_parsing_args) | |
| 427 { | |
|
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428 if (CPP_OPTION (pfile, cpp_pedantic)) |
| 0 | 429 cpp_error (pfile, CPP_DL_PEDWARN, |
| 430 "embedding a directive within macro arguments is not portable"); | |
| 431 pfile->state.parsing_args = 0; | |
| 432 pfile->state.prevent_expansion = 0; | |
| 433 } | |
| 434 start_directive (pfile); | |
| 435 dname = _cpp_lex_token (pfile); | |
| 436 | |
| 437 if (dname->type == CPP_NAME) | |
| 438 { | |
|
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439 if (dname->val.node.node->is_directive) |
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440 dir = &dtable[dname->val.node.node->directive_index]; |
| 0 | 441 } |
| 442 /* We do not recognize the # followed by a number extension in | |
| 443 assembler code. */ | |
| 444 else if (dname->type == CPP_NUMBER && CPP_OPTION (pfile, lang) != CLK_ASM) | |
| 445 { | |
| 446 dir = &linemarker_dir; | |
| 447 if (CPP_PEDANTIC (pfile) && ! CPP_OPTION (pfile, preprocessed) | |
| 448 && ! pfile->state.skipping) | |
| 449 cpp_error (pfile, CPP_DL_PEDWARN, | |
| 450 "style of line directive is a GCC extension"); | |
| 451 } | |
| 452 | |
| 453 if (dir) | |
| 454 { | |
| 455 /* If we have a directive that is not an opening conditional, | |
| 456 invalidate any control macro. */ | |
| 457 if (! (dir->flags & IF_COND)) | |
| 458 pfile->mi_valid = false; | |
| 459 | |
| 460 /* Kluge alert. In order to be sure that code like this | |
| 461 | |
| 462 #define HASH # | |
| 463 HASH define foo bar | |
| 464 | |
| 465 does not cause '#define foo bar' to get executed when | |
| 466 compiled with -save-temps, we recognize directives in | |
| 467 -fpreprocessed mode only if the # is in column 1. macro.c | |
| 468 puts a space in front of any '#' at the start of a macro. | |
| 469 | |
| 470 We exclude the -fdirectives-only case because macro expansion | |
| 471 has not been performed yet, and block comments can cause spaces | |
| 111 | 472 to precede the directive. */ |
| 0 | 473 if (CPP_OPTION (pfile, preprocessed) |
| 474 && !CPP_OPTION (pfile, directives_only) | |
| 475 && (indented || !(dir->flags & IN_I))) | |
| 476 { | |
| 477 skip = 0; | |
| 478 dir = 0; | |
| 479 } | |
| 480 else | |
| 481 { | |
| 482 /* In failed conditional groups, all non-conditional | |
| 483 directives are ignored. Before doing that, whether | |
| 484 skipping or not, we should lex angle-bracketed headers | |
| 485 correctly, and maybe output some diagnostics. */ | |
| 486 pfile->state.angled_headers = dir->flags & INCL; | |
| 487 pfile->state.directive_wants_padding = dir->flags & INCL; | |
| 488 if (! CPP_OPTION (pfile, preprocessed)) | |
| 489 directive_diagnostics (pfile, dir, indented); | |
| 490 if (pfile->state.skipping && !(dir->flags & COND)) | |
| 491 dir = 0; | |
| 492 } | |
| 493 } | |
| 494 else if (dname->type == CPP_EOF) | |
| 495 ; /* CPP_EOF is the "null directive". */ | |
| 496 else | |
| 497 { | |
| 498 /* An unknown directive. Don't complain about it in assembly | |
| 499 source: we don't know where the comments are, and # may | |
| 500 introduce assembler pseudo-ops. Don't complain about invalid | |
| 501 directives in skipped conditional groups (6.10 p4). */ | |
| 502 if (CPP_OPTION (pfile, lang) == CLK_ASM) | |
| 503 skip = 0; | |
| 504 else if (!pfile->state.skipping) | |
| 111 | 505 { |
| 506 const char *unrecognized | |
| 507 = (const char *)cpp_token_as_text (pfile, dname); | |
| 508 const char *hint = NULL; | |
| 509 | |
| 510 /* Call back into gcc to get a spelling suggestion. Ideally | |
| 511 we'd just use best_match from gcc/spellcheck.h (and filter | |
| 512 out the uncommon directives), but that requires moving it | |
| 513 to a support library. */ | |
| 514 if (pfile->cb.get_suggestion) | |
| 515 hint = pfile->cb.get_suggestion (pfile, unrecognized, | |
| 516 directive_names); | |
| 517 | |
| 518 if (hint) | |
| 519 { | |
| 520 rich_location richloc (pfile->line_table, dname->src_loc); | |
| 521 source_range misspelled_token_range | |
| 522 = get_range_from_loc (pfile->line_table, dname->src_loc); | |
| 523 richloc.add_fixit_replace (misspelled_token_range, hint); | |
| 131 | 524 cpp_error_at (pfile, CPP_DL_ERROR, &richloc, |
| 525 "invalid preprocessing directive #%s;" | |
| 526 " did you mean #%s?", | |
| 527 unrecognized, hint); | |
| 111 | 528 } |
| 529 else | |
| 530 cpp_error (pfile, CPP_DL_ERROR, | |
| 531 "invalid preprocessing directive #%s", | |
| 532 unrecognized); | |
| 533 } | |
| 0 | 534 } |
| 535 | |
| 536 pfile->directive = dir; | |
| 537 if (CPP_OPTION (pfile, traditional)) | |
| 538 prepare_directive_trad (pfile); | |
| 539 | |
| 540 if (dir) | |
| 541 pfile->directive->handler (pfile); | |
| 542 else if (skip == 0) | |
| 543 _cpp_backup_tokens (pfile, 1); | |
| 544 | |
| 545 end_directive (pfile, skip); | |
| 546 if (was_parsing_args && !pfile->state.in_deferred_pragma) | |
| 547 { | |
| 548 /* Restore state when within macro args. */ | |
| 549 pfile->state.parsing_args = 2; | |
| 550 pfile->state.prevent_expansion = 1; | |
| 551 } | |
| 552 if (was_discarding_output) | |
| 553 pfile->state.prevent_expansion = 1; | |
| 554 return skip; | |
| 555 } | |
| 556 | |
| 557 /* Directive handler wrapper used by the command line option | |
| 558 processor. BUF is \n terminated. */ | |
| 559 static void | |
| 560 run_directive (cpp_reader *pfile, int dir_no, const char *buf, size_t count) | |
| 561 { | |
| 562 cpp_push_buffer (pfile, (const uchar *) buf, count, | |
| 563 /* from_stage3 */ true); | |
| 564 start_directive (pfile); | |
| 565 | |
| 566 /* This is a short-term fix to prevent a leading '#' being | |
| 567 interpreted as a directive. */ | |
| 568 _cpp_clean_line (pfile); | |
| 569 | |
| 570 pfile->directive = &dtable[dir_no]; | |
| 571 if (CPP_OPTION (pfile, traditional)) | |
| 572 prepare_directive_trad (pfile); | |
| 573 pfile->directive->handler (pfile); | |
| 574 end_directive (pfile, 1); | |
| 575 _cpp_pop_buffer (pfile); | |
| 576 } | |
| 577 | |
| 578 /* Checks for validity the macro name in #define, #undef, #ifdef and | |
| 579 #ifndef directives. IS_DEF_OR_UNDEF is true if this call is | |
| 580 processing a #define or #undefine directive, and false | |
| 581 otherwise. */ | |
| 582 static cpp_hashnode * | |
| 583 lex_macro_node (cpp_reader *pfile, bool is_def_or_undef) | |
| 584 { | |
| 585 const cpp_token *token = _cpp_lex_token (pfile); | |
| 586 | |
| 587 /* The token immediately after #define must be an identifier. That | |
| 588 identifier may not be "defined", per C99 6.10.8p4. | |
| 589 In C++, it may not be any of the "named operators" either, | |
| 590 per C++98 [lex.digraph], [lex.key]. | |
| 591 Finally, the identifier may not have been poisoned. (In that case | |
| 592 the lexer has issued the error message for us.) */ | |
| 593 | |
| 594 if (token->type == CPP_NAME) | |
| 595 { | |
|
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596 cpp_hashnode *node = token->val.node.node; |
| 0 | 597 |
| 145 | 598 if (is_def_or_undef |
| 599 && node == pfile->spec_nodes.n_defined) | |
| 0 | 600 cpp_error (pfile, CPP_DL_ERROR, |
| 145 | 601 "\"%s\" cannot be used as a macro name", |
| 602 NODE_NAME (node)); | |
| 0 | 603 else if (! (node->flags & NODE_POISONED)) |
| 604 return node; | |
| 605 } | |
| 606 else if (token->flags & NAMED_OP) | |
| 607 cpp_error (pfile, CPP_DL_ERROR, | |
| 608 "\"%s\" cannot be used as a macro name as it is an operator in C++", | |
|
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609 NODE_NAME (token->val.node.node)); |
| 0 | 610 else if (token->type == CPP_EOF) |
| 611 cpp_error (pfile, CPP_DL_ERROR, "no macro name given in #%s directive", | |
| 612 pfile->directive->name); | |
| 613 else | |
| 614 cpp_error (pfile, CPP_DL_ERROR, "macro names must be identifiers"); | |
| 615 | |
| 616 return NULL; | |
| 617 } | |
| 618 | |
| 619 /* Process a #define directive. Most work is done in macro.c. */ | |
| 620 static void | |
| 621 do_define (cpp_reader *pfile) | |
| 622 { | |
| 623 cpp_hashnode *node = lex_macro_node (pfile, true); | |
| 624 | |
| 625 if (node) | |
| 626 { | |
| 627 /* If we have been requested to expand comments into macros, | |
| 628 then re-enable saving of comments. */ | |
| 629 pfile->state.save_comments = | |
| 630 ! CPP_OPTION (pfile, discard_comments_in_macro_exp); | |
| 631 | |
| 632 if (pfile->cb.before_define) | |
| 633 pfile->cb.before_define (pfile); | |
| 634 | |
| 635 if (_cpp_create_definition (pfile, node)) | |
| 636 if (pfile->cb.define) | |
| 637 pfile->cb.define (pfile, pfile->directive_line, node); | |
| 638 | |
| 639 node->flags &= ~NODE_USED; | |
| 640 } | |
| 641 } | |
| 642 | |
| 643 /* Handle #undef. Mark the identifier NT_VOID in the hash table. */ | |
| 644 static void | |
| 645 do_undef (cpp_reader *pfile) | |
| 646 { | |
| 647 cpp_hashnode *node = lex_macro_node (pfile, true); | |
| 648 | |
| 649 if (node) | |
| 650 { | |
| 651 if (pfile->cb.before_define) | |
| 652 pfile->cb.before_define (pfile); | |
| 653 | |
| 654 if (pfile->cb.undef) | |
| 655 pfile->cb.undef (pfile, pfile->directive_line, node); | |
| 656 | |
| 657 /* 6.10.3.5 paragraph 2: [#undef] is ignored if the specified | |
| 658 identifier is not currently defined as a macro name. */ | |
| 131 | 659 if (cpp_macro_p (node)) |
| 0 | 660 { |
| 661 if (node->flags & NODE_WARN) | |
| 662 cpp_error (pfile, CPP_DL_WARNING, | |
| 663 "undefining \"%s\"", NODE_NAME (node)); | |
| 131 | 664 else if (cpp_builtin_macro_p (node) |
| 111 | 665 && CPP_OPTION (pfile, warn_builtin_macro_redefined)) |
| 666 cpp_warning_with_line (pfile, CPP_W_BUILTIN_MACRO_REDEFINED, | |
| 667 pfile->directive_line, 0, | |
| 668 "undefining \"%s\"", NODE_NAME (node)); | |
| 0 | 669 |
| 670 if (CPP_OPTION (pfile, warn_unused_macros)) | |
| 671 _cpp_warn_if_unused_macro (pfile, node, NULL); | |
| 672 | |
| 673 _cpp_free_definition (node); | |
| 674 } | |
| 675 } | |
| 676 | |
|
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677 check_eol (pfile, false); |
| 0 | 678 } |
| 679 | |
| 680 /* Undefine a single macro/assertion/whatever. */ | |
| 681 | |
| 682 static int | |
| 683 undefine_macros (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *h, | |
| 684 void *data_p ATTRIBUTE_UNUSED) | |
| 685 { | |
| 686 /* Body of _cpp_free_definition inlined here for speed. | |
| 687 Macros and assertions no longer have anything to free. */ | |
| 688 h->type = NT_VOID; | |
| 131 | 689 h->value.answers = NULL; |
| 690 h->flags &= ~(NODE_POISONED|NODE_DISABLED|NODE_USED); | |
| 0 | 691 return 1; |
| 692 } | |
| 693 | |
| 694 /* Undefine all macros and assertions. */ | |
| 695 | |
| 696 void | |
| 697 cpp_undef_all (cpp_reader *pfile) | |
| 698 { | |
| 699 cpp_forall_identifiers (pfile, undefine_macros, NULL); | |
| 700 } | |
| 701 | |
| 702 | |
| 703 /* Helper routine used by parse_include. Reinterpret the current line | |
| 704 as an h-char-sequence (< ... >); we are looking at the first token | |
| 705 after the <. Returns a malloced filename. */ | |
| 706 static char * | |
| 707 glue_header_name (cpp_reader *pfile) | |
| 708 { | |
| 709 const cpp_token *token; | |
| 710 char *buffer; | |
| 711 size_t len, total_len = 0, capacity = 1024; | |
| 712 | |
| 713 /* To avoid lexed tokens overwriting our glued name, we can only | |
| 714 allocate from the string pool once we've lexed everything. */ | |
| 715 buffer = XNEWVEC (char, capacity); | |
| 716 for (;;) | |
| 717 { | |
| 718 token = get_token_no_padding (pfile); | |
| 719 | |
| 720 if (token->type == CPP_GREATER) | |
| 721 break; | |
| 722 if (token->type == CPP_EOF) | |
| 723 { | |
| 724 cpp_error (pfile, CPP_DL_ERROR, "missing terminating > character"); | |
| 725 break; | |
| 726 } | |
| 727 | |
| 728 len = cpp_token_len (token) + 2; /* Leading space, terminating \0. */ | |
| 729 if (total_len + len > capacity) | |
| 730 { | |
| 731 capacity = (capacity + len) * 2; | |
| 732 buffer = XRESIZEVEC (char, buffer, capacity); | |
| 733 } | |
| 734 | |
| 735 if (token->flags & PREV_WHITE) | |
| 736 buffer[total_len++] = ' '; | |
| 737 | |
| 738 total_len = (cpp_spell_token (pfile, token, (uchar *) &buffer[total_len], | |
| 739 true) | |
| 740 - (uchar *) buffer); | |
| 741 } | |
| 742 | |
| 743 buffer[total_len] = '\0'; | |
| 744 return buffer; | |
| 745 } | |
| 746 | |
| 747 /* Returns the file name of #include, #include_next, #import and | |
| 748 #pragma dependency. The string is malloced and the caller should | |
|
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|
749 free it. Returns NULL on error. LOCATION is the source location |
|
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|
750 of the file name. */ |
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|
751 |
| 0 | 752 static const char * |
| 753 parse_include (cpp_reader *pfile, int *pangle_brackets, | |
| 145 | 754 const cpp_token ***buf, location_t *location) |
| 0 | 755 { |
| 756 char *fname; | |
| 757 const cpp_token *header; | |
| 758 | |
| 759 /* Allow macro expansion. */ | |
| 760 header = get_token_no_padding (pfile); | |
|
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|
761 *location = header->src_loc; |
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|
762 if ((header->type == CPP_STRING && header->val.str.text[0] != 'R') |
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|
763 || header->type == CPP_HEADER_NAME) |
| 0 | 764 { |
| 765 fname = XNEWVEC (char, header->val.str.len - 1); | |
| 766 memcpy (fname, header->val.str.text + 1, header->val.str.len - 2); | |
| 767 fname[header->val.str.len - 2] = '\0'; | |
| 768 *pangle_brackets = header->type == CPP_HEADER_NAME; | |
| 769 } | |
| 770 else if (header->type == CPP_LESS) | |
| 771 { | |
| 772 fname = glue_header_name (pfile); | |
| 773 *pangle_brackets = 1; | |
| 774 } | |
| 775 else | |
| 776 { | |
| 777 const unsigned char *dir; | |
| 778 | |
| 779 if (pfile->directive == &dtable[T_PRAGMA]) | |
| 780 dir = UC"pragma dependency"; | |
| 781 else | |
| 782 dir = pfile->directive->name; | |
| 783 cpp_error (pfile, CPP_DL_ERROR, "#%s expects \"FILENAME\" or <FILENAME>", | |
| 784 dir); | |
| 785 | |
| 786 return NULL; | |
| 787 } | |
| 788 | |
| 789 if (pfile->directive == &dtable[T_PRAGMA]) | |
| 790 { | |
| 791 /* This pragma allows extra tokens after the file name. */ | |
| 792 } | |
| 793 else if (buf == NULL || CPP_OPTION (pfile, discard_comments)) | |
|
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|
794 check_eol (pfile, true); |
| 0 | 795 else |
| 796 { | |
| 797 /* If we are not discarding comments, then gather them while | |
| 798 doing the eol check. */ | |
| 799 *buf = check_eol_return_comments (pfile); | |
| 800 } | |
| 801 | |
| 802 return fname; | |
| 803 } | |
| 804 | |
| 805 /* Handle #include, #include_next and #import. */ | |
| 806 static void | |
| 807 do_include_common (cpp_reader *pfile, enum include_type type) | |
| 808 { | |
| 809 const char *fname; | |
| 810 int angle_brackets; | |
| 811 const cpp_token **buf = NULL; | |
| 145 | 812 location_t location; |
| 0 | 813 |
| 814 /* Re-enable saving of comments if requested, so that the include | |
| 815 callback can dump comments which follow #include. */ | |
| 816 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
| 817 | |
| 145 | 818 /* Tell the lexer this is an include directive -- we want it to |
| 819 increment the line number even if this is the last line of a file. */ | |
| 820 pfile->state.in_directive = 2; | |
| 821 | |
|
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|
822 fname = parse_include (pfile, &angle_brackets, &buf, &location); |
| 0 | 823 if (!fname) |
| 145 | 824 goto done; |
| 0 | 825 |
| 826 if (!*fname) | |
| 145 | 827 { |
| 828 cpp_error_with_line (pfile, CPP_DL_ERROR, location, 0, | |
| 829 "empty filename in #%s", | |
| 830 pfile->directive->name); | |
| 831 goto done; | |
| 832 } | |
| 0 | 833 |
| 834 /* Prevent #include recursion. */ | |
| 145 | 835 if (pfile->line_table->depth >= CPP_OPTION (pfile, max_include_depth)) |
| 836 cpp_error (pfile, | |
| 837 CPP_DL_ERROR, | |
| 838 "#include nested depth %u exceeds maximum of %u" | |
| 839 " (use -fmax-include-depth=DEPTH to increase the maximum)", | |
| 840 pfile->line_table->depth, | |
| 841 CPP_OPTION (pfile, max_include_depth)); | |
| 0 | 842 else |
| 843 { | |
| 844 /* Get out of macro context, if we are. */ | |
| 845 skip_rest_of_line (pfile); | |
| 846 | |
| 847 if (pfile->cb.include) | |
| 848 pfile->cb.include (pfile, pfile->directive_line, | |
| 849 pfile->directive->name, fname, angle_brackets, | |
| 850 buf); | |
| 851 | |
| 111 | 852 _cpp_stack_include (pfile, fname, angle_brackets, type, location); |
| 0 | 853 } |
| 854 | |
| 145 | 855 done: |
| 0 | 856 XDELETEVEC (fname); |
| 857 if (buf) | |
| 858 XDELETEVEC (buf); | |
| 859 } | |
| 860 | |
| 861 static void | |
| 862 do_include (cpp_reader *pfile) | |
| 863 { | |
| 864 do_include_common (pfile, IT_INCLUDE); | |
| 865 } | |
| 866 | |
| 867 static void | |
| 868 do_import (cpp_reader *pfile) | |
| 869 { | |
| 870 do_include_common (pfile, IT_IMPORT); | |
| 871 } | |
| 872 | |
| 873 static void | |
| 874 do_include_next (cpp_reader *pfile) | |
| 875 { | |
| 876 enum include_type type = IT_INCLUDE_NEXT; | |
| 877 | |
| 878 /* If this is the primary source file, warn and use the normal | |
| 879 search logic. */ | |
| 880 if (cpp_in_primary_file (pfile)) | |
| 881 { | |
| 882 cpp_error (pfile, CPP_DL_WARNING, | |
| 883 "#include_next in primary source file"); | |
| 884 type = IT_INCLUDE; | |
| 885 } | |
| 886 do_include_common (pfile, type); | |
| 887 } | |
| 888 | |
| 889 /* Subroutine of do_linemarker. Read possible flags after file name. | |
| 890 LAST is the last flag seen; 0 if this is the first flag. Return the | |
| 891 flag if it is valid, 0 at the end of the directive. Otherwise | |
| 892 complain. */ | |
| 893 static unsigned int | |
| 894 read_flag (cpp_reader *pfile, unsigned int last) | |
| 895 { | |
| 896 const cpp_token *token = _cpp_lex_token (pfile); | |
| 897 | |
| 898 if (token->type == CPP_NUMBER && token->val.str.len == 1) | |
| 899 { | |
| 900 unsigned int flag = token->val.str.text[0] - '0'; | |
| 901 | |
| 902 if (flag > last && flag <= 4 | |
| 903 && (flag != 4 || last == 3) | |
| 904 && (flag != 2 || last == 0)) | |
| 905 return flag; | |
| 906 } | |
| 907 | |
| 908 if (token->type != CPP_EOF) | |
| 909 cpp_error (pfile, CPP_DL_ERROR, "invalid flag \"%s\" in line directive", | |
| 910 cpp_token_as_text (pfile, token)); | |
| 911 return 0; | |
| 912 } | |
| 913 | |
| 914 /* Subroutine of do_line and do_linemarker. Convert a number in STR, | |
| 915 of length LEN, to binary; store it in NUMP, and return false if the | |
| 916 number was well-formed, true if not. WRAPPED is set to true if the | |
| 917 number did not fit into 'unsigned long'. */ | |
| 918 static bool | |
| 919 strtolinenum (const uchar *str, size_t len, linenum_type *nump, bool *wrapped) | |
| 920 { | |
| 921 linenum_type reg = 0; | |
| 922 linenum_type reg_prev = 0; | |
| 923 | |
| 924 uchar c; | |
| 925 *wrapped = false; | |
| 926 while (len--) | |
| 927 { | |
| 928 c = *str++; | |
| 929 if (!ISDIGIT (c)) | |
| 930 return true; | |
| 931 reg *= 10; | |
| 932 reg += c - '0'; | |
| 933 if (reg < reg_prev) | |
| 934 *wrapped = true; | |
| 935 reg_prev = reg; | |
| 936 } | |
| 937 *nump = reg; | |
| 938 return false; | |
| 939 } | |
| 940 | |
| 941 /* Interpret #line command. | |
| 942 Note that the filename string (if any) is a true string constant | |
| 943 (escapes are interpreted), unlike in #line. */ | |
| 944 static void | |
| 945 do_line (cpp_reader *pfile) | |
| 946 { | |
| 145 | 947 class line_maps *line_table = pfile->line_table; |
| 111 | 948 const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table); |
| 0 | 949 |
| 950 /* skip_rest_of_line() may cause line table to be realloc()ed so note down | |
| 951 sysp right now. */ | |
| 952 | |
| 111 | 953 unsigned char map_sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (map); |
| 0 | 954 const cpp_token *token; |
| 111 | 955 const char *new_file = ORDINARY_MAP_FILE_NAME (map); |
| 0 | 956 linenum_type new_lineno; |
| 957 | |
| 958 /* C99 raised the minimum limit on #line numbers. */ | |
| 959 linenum_type cap = CPP_OPTION (pfile, c99) ? 2147483647 : 32767; | |
| 960 bool wrapped; | |
| 961 | |
| 962 /* #line commands expand macros. */ | |
| 963 token = cpp_get_token (pfile); | |
| 964 if (token->type != CPP_NUMBER | |
| 965 || strtolinenum (token->val.str.text, token->val.str.len, | |
| 966 &new_lineno, &wrapped)) | |
| 967 { | |
| 968 if (token->type == CPP_EOF) | |
| 969 cpp_error (pfile, CPP_DL_ERROR, "unexpected end of file after #line"); | |
| 970 else | |
| 971 cpp_error (pfile, CPP_DL_ERROR, | |
| 972 "\"%s\" after #line is not a positive integer", | |
| 973 cpp_token_as_text (pfile, token)); | |
| 974 return; | |
| 975 } | |
| 976 | |
| 977 if (CPP_PEDANTIC (pfile) && (new_lineno == 0 || new_lineno > cap || wrapped)) | |
| 978 cpp_error (pfile, CPP_DL_PEDWARN, "line number out of range"); | |
| 979 else if (wrapped) | |
| 980 cpp_error (pfile, CPP_DL_WARNING, "line number out of range"); | |
| 981 | |
| 982 token = cpp_get_token (pfile); | |
| 983 if (token->type == CPP_STRING) | |
| 984 { | |
| 985 cpp_string s = { 0, 0 }; | |
| 986 if (cpp_interpret_string_notranslate (pfile, &token->val.str, 1, | |
|
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987 &s, CPP_STRING)) |
| 0 | 988 new_file = (const char *)s.text; |
|
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989 check_eol (pfile, true); |
| 0 | 990 } |
| 991 else if (token->type != CPP_EOF) | |
| 992 { | |
| 993 cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", | |
| 994 cpp_token_as_text (pfile, token)); | |
| 995 return; | |
| 996 } | |
| 997 | |
| 998 skip_rest_of_line (pfile); | |
|
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999 _cpp_do_file_change (pfile, LC_RENAME_VERBATIM, new_file, new_lineno, |
| 0 | 1000 map_sysp); |
| 111 | 1001 line_table->seen_line_directive = true; |
| 0 | 1002 } |
| 1003 | |
| 1004 /* Interpret the # 44 "file" [flags] notation, which has slightly | |
| 1005 different syntax and semantics from #line: Flags are allowed, | |
| 1006 and we never complain about the line number being too big. */ | |
| 1007 static void | |
| 1008 do_linemarker (cpp_reader *pfile) | |
| 1009 { | |
| 145 | 1010 class line_maps *line_table = pfile->line_table; |
| 111 | 1011 const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table); |
| 0 | 1012 const cpp_token *token; |
| 111 | 1013 const char *new_file = ORDINARY_MAP_FILE_NAME (map); |
| 0 | 1014 linenum_type new_lineno; |
| 111 | 1015 unsigned int new_sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (map); |
|
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1016 enum lc_reason reason = LC_RENAME_VERBATIM; |
| 0 | 1017 int flag; |
| 1018 bool wrapped; | |
| 1019 | |
| 1020 /* Back up so we can get the number again. Putting this in | |
| 1021 _cpp_handle_directive risks two calls to _cpp_backup_tokens in | |
| 1022 some circumstances, which can segfault. */ | |
| 1023 _cpp_backup_tokens (pfile, 1); | |
| 1024 | |
| 1025 /* #line commands expand macros. */ | |
| 1026 token = cpp_get_token (pfile); | |
| 1027 if (token->type != CPP_NUMBER | |
| 1028 || strtolinenum (token->val.str.text, token->val.str.len, | |
| 1029 &new_lineno, &wrapped)) | |
| 1030 { | |
| 1031 /* Unlike #line, there does not seem to be a way to get an EOF | |
| 1032 here. So, it should be safe to always spell the token. */ | |
| 1033 cpp_error (pfile, CPP_DL_ERROR, | |
| 1034 "\"%s\" after # is not a positive integer", | |
| 1035 cpp_token_as_text (pfile, token)); | |
| 1036 return; | |
| 1037 } | |
| 1038 | |
| 1039 token = cpp_get_token (pfile); | |
| 1040 if (token->type == CPP_STRING) | |
| 1041 { | |
| 1042 cpp_string s = { 0, 0 }; | |
| 1043 if (cpp_interpret_string_notranslate (pfile, &token->val.str, | |
|
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1044 1, &s, CPP_STRING)) |
| 0 | 1045 new_file = (const char *)s.text; |
| 1046 | |
| 1047 new_sysp = 0; | |
| 1048 flag = read_flag (pfile, 0); | |
| 1049 if (flag == 1) | |
| 1050 { | |
| 1051 reason = LC_ENTER; | |
| 1052 /* Fake an include for cpp_included (). */ | |
| 1053 _cpp_fake_include (pfile, new_file); | |
| 1054 flag = read_flag (pfile, flag); | |
| 1055 } | |
| 1056 else if (flag == 2) | |
| 1057 { | |
| 1058 reason = LC_LEAVE; | |
| 1059 flag = read_flag (pfile, flag); | |
| 1060 } | |
| 1061 if (flag == 3) | |
| 1062 { | |
| 1063 new_sysp = 1; | |
| 1064 flag = read_flag (pfile, flag); | |
| 1065 if (flag == 4) | |
| 1066 new_sysp = 2; | |
| 1067 } | |
| 1068 pfile->buffer->sysp = new_sysp; | |
| 1069 | |
|
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1070 check_eol (pfile, false); |
| 0 | 1071 } |
| 1072 else if (token->type != CPP_EOF) | |
| 1073 { | |
| 1074 cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", | |
| 1075 cpp_token_as_text (pfile, token)); | |
| 1076 return; | |
| 1077 } | |
| 1078 | |
| 1079 skip_rest_of_line (pfile); | |
|
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1080 |
| 111 | 1081 if (reason == LC_LEAVE) |
| 1082 { | |
| 1083 /* Reread map since cpp_get_token can invalidate it with a | |
| 1084 reallocation. */ | |
| 1085 map = LINEMAPS_LAST_ORDINARY_MAP (line_table); | |
| 131 | 1086 const line_map_ordinary *from |
| 1087 = linemap_included_from_linemap (line_table, map); | |
| 145 | 1088 |
| 1089 if (!from) | |
| 1090 /* Not nested. */; | |
| 1091 else if (!new_file[0]) | |
| 1092 /* Leaving to "" means fill in the popped-to name. */ | |
| 1093 new_file = ORDINARY_MAP_FILE_NAME (from); | |
| 1094 else if (filename_cmp (ORDINARY_MAP_FILE_NAME (from), new_file) != 0) | |
| 1095 /* It's the wrong name, Grommit! */ | |
| 1096 from = NULL; | |
| 1097 | |
| 1098 if (!from) | |
| 111 | 1099 { |
| 1100 cpp_warning (pfile, CPP_W_NONE, | |
| 1101 "file \"%s\" linemarker ignored due to " | |
| 1102 "incorrect nesting", new_file); | |
| 1103 return; | |
| 1104 } | |
| 1105 } | |
| 145 | 1106 |
|
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1107 /* Compensate for the increment in linemap_add that occurs in |
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1108 _cpp_do_file_change. We're currently at the start of the line |
| 145 | 1109 *following* the #line directive. A separate location_t for this |
|
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1110 location makes no sense (until we do the LC_LEAVE), and |
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1111 complicates LAST_SOURCE_LINE_LOCATION. */ |
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1112 pfile->line_table->highest_location--; |
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1113 |
| 0 | 1114 _cpp_do_file_change (pfile, reason, new_file, new_lineno, new_sysp); |
| 111 | 1115 line_table->seen_line_directive = true; |
| 0 | 1116 } |
| 1117 | |
| 1118 /* Arrange the file_change callback. pfile->line has changed to | |
| 1119 FILE_LINE of TO_FILE, for reason REASON. SYSP is 1 for a system | |
| 1120 header, 2 for a system header that needs to be extern "C" protected, | |
| 1121 and zero otherwise. */ | |
| 1122 void | |
| 1123 _cpp_do_file_change (cpp_reader *pfile, enum lc_reason reason, | |
| 1124 const char *to_file, linenum_type file_line, | |
| 1125 unsigned int sysp) | |
| 1126 { | |
| 111 | 1127 linemap_assert (reason != LC_ENTER_MACRO); |
| 0 | 1128 const struct line_map *map = linemap_add (pfile->line_table, reason, sysp, |
| 1129 to_file, file_line); | |
| 111 | 1130 const line_map_ordinary *ord_map = NULL; |
| 0 | 1131 if (map != NULL) |
| 111 | 1132 { |
| 1133 ord_map = linemap_check_ordinary (map); | |
| 1134 linemap_line_start (pfile->line_table, | |
| 1135 ORDINARY_MAP_STARTING_LINE_NUMBER (ord_map), | |
| 1136 127); | |
| 1137 } | |
| 0 | 1138 |
| 1139 if (pfile->cb.file_change) | |
| 111 | 1140 pfile->cb.file_change (pfile, ord_map); |
| 0 | 1141 } |
| 1142 | |
| 1143 /* Report a warning or error detected by the program we are | |
| 1144 processing. Use the directive's tokens in the error message. */ | |
| 1145 static void | |
| 131 | 1146 do_diagnostic (cpp_reader *pfile, enum cpp_diagnostic_level code, |
| 1147 enum cpp_warning_reason reason, int print_dir) | |
| 0 | 1148 { |
| 1149 const unsigned char *dir_name; | |
| 1150 unsigned char *line; | |
| 145 | 1151 location_t src_loc = pfile->cur_token[-1].src_loc; |
| 0 | 1152 |
| 1153 if (print_dir) | |
| 1154 dir_name = pfile->directive->name; | |
| 1155 else | |
| 1156 dir_name = NULL; | |
| 1157 pfile->state.prevent_expansion++; | |
| 1158 line = cpp_output_line_to_string (pfile, dir_name); | |
| 1159 pfile->state.prevent_expansion--; | |
| 1160 | |
|
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1161 if (code == CPP_DL_WARNING_SYSHDR && reason) |
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1162 cpp_warning_with_line_syshdr (pfile, reason, src_loc, 0, "%s", line); |
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1163 else if (code == CPP_DL_WARNING && reason) |
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1164 cpp_warning_with_line (pfile, reason, src_loc, 0, "%s", line); |
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1165 else |
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1166 cpp_error_with_line (pfile, code, src_loc, 0, "%s", line); |
| 0 | 1167 free (line); |
| 1168 } | |
| 1169 | |
| 1170 static void | |
| 1171 do_error (cpp_reader *pfile) | |
| 1172 { | |
| 131 | 1173 do_diagnostic (pfile, CPP_DL_ERROR, CPP_W_NONE, 1); |
| 0 | 1174 } |
| 1175 | |
| 1176 static void | |
| 1177 do_warning (cpp_reader *pfile) | |
| 1178 { | |
| 1179 /* We want #warning diagnostics to be emitted in system headers too. */ | |
|
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1180 do_diagnostic (pfile, CPP_DL_WARNING_SYSHDR, CPP_W_WARNING_DIRECTIVE, 1); |
| 0 | 1181 } |
| 1182 | |
| 1183 /* Report program identification. */ | |
| 1184 static void | |
| 1185 do_ident (cpp_reader *pfile) | |
| 1186 { | |
| 1187 const cpp_token *str = cpp_get_token (pfile); | |
| 1188 | |
| 1189 if (str->type != CPP_STRING) | |
| 1190 cpp_error (pfile, CPP_DL_ERROR, "invalid #%s directive", | |
| 1191 pfile->directive->name); | |
| 1192 else if (pfile->cb.ident) | |
| 1193 pfile->cb.ident (pfile, pfile->directive_line, &str->val.str); | |
| 1194 | |
|
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1195 check_eol (pfile, false); |
| 0 | 1196 } |
| 1197 | |
| 1198 /* Lookup a PRAGMA name in a singly-linked CHAIN. Returns the | |
| 1199 matching entry, or NULL if none is found. The returned entry could | |
| 1200 be the start of a namespace chain, or a pragma. */ | |
| 1201 static struct pragma_entry * | |
| 1202 lookup_pragma_entry (struct pragma_entry *chain, const cpp_hashnode *pragma) | |
| 1203 { | |
| 1204 while (chain && chain->pragma != pragma) | |
| 1205 chain = chain->next; | |
| 1206 | |
| 1207 return chain; | |
| 1208 } | |
| 1209 | |
| 1210 /* Create and insert a blank pragma entry at the beginning of a | |
| 1211 singly-linked CHAIN. */ | |
| 1212 static struct pragma_entry * | |
| 1213 new_pragma_entry (cpp_reader *pfile, struct pragma_entry **chain) | |
| 1214 { | |
| 1215 struct pragma_entry *new_entry; | |
| 1216 | |
| 1217 new_entry = (struct pragma_entry *) | |
| 1218 _cpp_aligned_alloc (pfile, sizeof (struct pragma_entry)); | |
| 1219 | |
| 1220 memset (new_entry, 0, sizeof (struct pragma_entry)); | |
| 1221 new_entry->next = *chain; | |
| 1222 | |
| 1223 *chain = new_entry; | |
| 1224 return new_entry; | |
| 1225 } | |
| 1226 | |
| 1227 /* Register a pragma NAME in namespace SPACE. If SPACE is null, it | |
| 1228 goes in the global namespace. */ | |
| 1229 static struct pragma_entry * | |
| 1230 register_pragma_1 (cpp_reader *pfile, const char *space, const char *name, | |
| 1231 bool allow_name_expansion) | |
| 1232 { | |
| 1233 struct pragma_entry **chain = &pfile->pragmas; | |
| 1234 struct pragma_entry *entry; | |
| 1235 const cpp_hashnode *node; | |
| 1236 | |
| 1237 if (space) | |
| 1238 { | |
| 1239 node = cpp_lookup (pfile, UC space, strlen (space)); | |
| 1240 entry = lookup_pragma_entry (*chain, node); | |
| 1241 if (!entry) | |
| 1242 { | |
| 1243 entry = new_pragma_entry (pfile, chain); | |
| 1244 entry->pragma = node; | |
| 1245 entry->is_nspace = true; | |
| 1246 entry->allow_expansion = allow_name_expansion; | |
| 1247 } | |
| 1248 else if (!entry->is_nspace) | |
| 1249 goto clash; | |
| 1250 else if (entry->allow_expansion != allow_name_expansion) | |
| 1251 { | |
| 1252 cpp_error (pfile, CPP_DL_ICE, | |
| 1253 "registering pragmas in namespace \"%s\" with mismatched " | |
| 1254 "name expansion", space); | |
| 1255 return NULL; | |
| 1256 } | |
| 1257 chain = &entry->u.space; | |
| 1258 } | |
| 1259 else if (allow_name_expansion) | |
| 1260 { | |
| 1261 cpp_error (pfile, CPP_DL_ICE, | |
| 1262 "registering pragma \"%s\" with name expansion " | |
| 1263 "and no namespace", name); | |
| 1264 return NULL; | |
| 1265 } | |
| 1266 | |
| 1267 /* Check for duplicates. */ | |
| 1268 node = cpp_lookup (pfile, UC name, strlen (name)); | |
| 1269 entry = lookup_pragma_entry (*chain, node); | |
| 1270 if (entry == NULL) | |
| 1271 { | |
| 1272 entry = new_pragma_entry (pfile, chain); | |
| 1273 entry->pragma = node; | |
| 1274 return entry; | |
| 1275 } | |
| 1276 | |
| 1277 if (entry->is_nspace) | |
| 1278 clash: | |
| 1279 cpp_error (pfile, CPP_DL_ICE, | |
| 1280 "registering \"%s\" as both a pragma and a pragma namespace", | |
| 1281 NODE_NAME (node)); | |
| 1282 else if (space) | |
| 1283 cpp_error (pfile, CPP_DL_ICE, "#pragma %s %s is already registered", | |
| 1284 space, name); | |
| 1285 else | |
| 1286 cpp_error (pfile, CPP_DL_ICE, "#pragma %s is already registered", name); | |
| 1287 | |
| 1288 return NULL; | |
| 1289 } | |
| 1290 | |
| 1291 /* Register a cpplib internal pragma SPACE NAME with HANDLER. */ | |
| 1292 static void | |
| 1293 register_pragma_internal (cpp_reader *pfile, const char *space, | |
| 1294 const char *name, pragma_cb handler) | |
| 1295 { | |
| 1296 struct pragma_entry *entry; | |
| 1297 | |
| 1298 entry = register_pragma_1 (pfile, space, name, false); | |
| 1299 entry->is_internal = true; | |
| 1300 entry->u.handler = handler; | |
| 1301 } | |
| 1302 | |
| 1303 /* Register a pragma NAME in namespace SPACE. If SPACE is null, it | |
| 1304 goes in the global namespace. HANDLER is the handler it will call, | |
| 1305 which must be non-NULL. If ALLOW_EXPANSION is set, allow macro | |
| 1306 expansion while parsing pragma NAME. This function is exported | |
| 1307 from libcpp. */ | |
| 1308 void | |
| 1309 cpp_register_pragma (cpp_reader *pfile, const char *space, const char *name, | |
| 1310 pragma_cb handler, bool allow_expansion) | |
| 1311 { | |
| 1312 struct pragma_entry *entry; | |
| 1313 | |
| 1314 if (!handler) | |
| 1315 { | |
| 1316 cpp_error (pfile, CPP_DL_ICE, "registering pragma with NULL handler"); | |
| 1317 return; | |
| 1318 } | |
| 1319 | |
| 1320 entry = register_pragma_1 (pfile, space, name, false); | |
| 1321 if (entry) | |
| 1322 { | |
| 1323 entry->allow_expansion = allow_expansion; | |
| 1324 entry->u.handler = handler; | |
| 1325 } | |
| 1326 } | |
| 1327 | |
| 1328 /* Similarly, but create mark the pragma for deferred processing. | |
| 1329 When found, a CPP_PRAGMA token will be insertted into the stream | |
| 1330 with IDENT in the token->u.pragma slot. */ | |
| 1331 void | |
| 1332 cpp_register_deferred_pragma (cpp_reader *pfile, const char *space, | |
| 1333 const char *name, unsigned int ident, | |
| 1334 bool allow_expansion, bool allow_name_expansion) | |
| 1335 { | |
| 1336 struct pragma_entry *entry; | |
| 1337 | |
| 1338 entry = register_pragma_1 (pfile, space, name, allow_name_expansion); | |
| 1339 if (entry) | |
| 1340 { | |
| 1341 entry->is_deferred = true; | |
| 1342 entry->allow_expansion = allow_expansion; | |
| 1343 entry->u.ident = ident; | |
| 1344 } | |
| 1345 } | |
| 1346 | |
| 1347 /* Register the pragmas the preprocessor itself handles. */ | |
| 1348 void | |
| 1349 _cpp_init_internal_pragmas (cpp_reader *pfile) | |
| 1350 { | |
| 1351 /* Pragmas in the global namespace. */ | |
| 1352 register_pragma_internal (pfile, 0, "once", do_pragma_once); | |
|
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0
diff
changeset
|
1353 register_pragma_internal (pfile, 0, "push_macro", do_pragma_push_macro); |
|
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1354 register_pragma_internal (pfile, 0, "pop_macro", do_pragma_pop_macro); |
| 0 | 1355 |
| 1356 /* New GCC-specific pragmas should be put in the GCC namespace. */ | |
| 1357 register_pragma_internal (pfile, "GCC", "poison", do_pragma_poison); | |
| 1358 register_pragma_internal (pfile, "GCC", "system_header", | |
| 1359 do_pragma_system_header); | |
| 1360 register_pragma_internal (pfile, "GCC", "dependency", do_pragma_dependency); | |
| 111 | 1361 register_pragma_internal (pfile, "GCC", "warning", do_pragma_warning); |
| 1362 register_pragma_internal (pfile, "GCC", "error", do_pragma_error); | |
| 0 | 1363 } |
| 1364 | |
| 1365 /* Return the number of registered pragmas in PE. */ | |
| 1366 | |
| 1367 static int | |
| 1368 count_registered_pragmas (struct pragma_entry *pe) | |
| 1369 { | |
| 1370 int ct = 0; | |
| 1371 for (; pe != NULL; pe = pe->next) | |
| 1372 { | |
| 1373 if (pe->is_nspace) | |
| 1374 ct += count_registered_pragmas (pe->u.space); | |
| 1375 ct++; | |
| 1376 } | |
| 1377 return ct; | |
| 1378 } | |
| 1379 | |
| 1380 /* Save into SD the names of the registered pragmas referenced by PE, | |
| 1381 and return a pointer to the next free space in SD. */ | |
| 1382 | |
| 1383 static char ** | |
| 1384 save_registered_pragmas (struct pragma_entry *pe, char **sd) | |
| 1385 { | |
| 1386 for (; pe != NULL; pe = pe->next) | |
| 1387 { | |
| 1388 if (pe->is_nspace) | |
| 1389 sd = save_registered_pragmas (pe->u.space, sd); | |
| 1390 *sd++ = (char *) xmemdup (HT_STR (&pe->pragma->ident), | |
| 1391 HT_LEN (&pe->pragma->ident), | |
| 1392 HT_LEN (&pe->pragma->ident) + 1); | |
| 1393 } | |
| 1394 return sd; | |
| 1395 } | |
| 1396 | |
| 1397 /* Return a newly-allocated array which saves the names of the | |
| 1398 registered pragmas. */ | |
| 1399 | |
| 1400 char ** | |
| 1401 _cpp_save_pragma_names (cpp_reader *pfile) | |
| 1402 { | |
| 1403 int ct = count_registered_pragmas (pfile->pragmas); | |
| 1404 char **result = XNEWVEC (char *, ct); | |
| 1405 (void) save_registered_pragmas (pfile->pragmas, result); | |
| 1406 return result; | |
| 1407 } | |
| 1408 | |
| 1409 /* Restore from SD the names of the registered pragmas referenced by PE, | |
| 1410 and return a pointer to the next unused name in SD. */ | |
| 1411 | |
| 1412 static char ** | |
| 1413 restore_registered_pragmas (cpp_reader *pfile, struct pragma_entry *pe, | |
| 1414 char **sd) | |
| 1415 { | |
| 1416 for (; pe != NULL; pe = pe->next) | |
| 1417 { | |
| 1418 if (pe->is_nspace) | |
| 1419 sd = restore_registered_pragmas (pfile, pe->u.space, sd); | |
| 1420 pe->pragma = cpp_lookup (pfile, UC *sd, strlen (*sd)); | |
| 1421 free (*sd); | |
| 1422 sd++; | |
| 1423 } | |
| 1424 return sd; | |
| 1425 } | |
| 1426 | |
| 1427 /* Restore the names of the registered pragmas from SAVED. */ | |
| 1428 | |
| 1429 void | |
| 1430 _cpp_restore_pragma_names (cpp_reader *pfile, char **saved) | |
| 1431 { | |
| 1432 (void) restore_registered_pragmas (pfile, pfile->pragmas, saved); | |
| 1433 free (saved); | |
| 1434 } | |
| 1435 | |
| 1436 /* Pragmata handling. We handle some, and pass the rest on to the | |
| 1437 front end. C99 defines three pragmas and says that no macro | |
| 1438 expansion is to be performed on them; whether or not macro | |
| 1439 expansion happens for other pragmas is implementation defined. | |
| 1440 This implementation allows for a mix of both, since GCC did not | |
| 1441 traditionally macro expand its (few) pragmas, whereas OpenMP | |
| 1442 specifies that macro expansion should happen. */ | |
| 1443 static void | |
| 1444 do_pragma (cpp_reader *pfile) | |
| 1445 { | |
| 1446 const struct pragma_entry *p = NULL; | |
| 111 | 1447 const cpp_token *token, *pragma_token; |
| 145 | 1448 location_t pragma_token_virt_loc = 0; |
| 0 | 1449 cpp_token ns_token; |
| 1450 unsigned int count = 1; | |
| 1451 | |
| 1452 pfile->state.prevent_expansion++; | |
| 1453 | |
| 111 | 1454 pragma_token = token = cpp_get_token_with_location (pfile, |
| 1455 &pragma_token_virt_loc); | |
| 0 | 1456 ns_token = *token; |
| 1457 if (token->type == CPP_NAME) | |
| 1458 { | |
|
55
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diff
changeset
|
1459 p = lookup_pragma_entry (pfile->pragmas, token->val.node.node); |
| 0 | 1460 if (p && p->is_nspace) |
| 1461 { | |
| 1462 bool allow_name_expansion = p->allow_expansion; | |
| 1463 if (allow_name_expansion) | |
| 1464 pfile->state.prevent_expansion--; | |
| 111 | 1465 |
| 0 | 1466 token = cpp_get_token (pfile); |
| 1467 if (token->type == CPP_NAME) | |
|
55
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47
diff
changeset
|
1468 p = lookup_pragma_entry (p->u.space, token->val.node.node); |
| 0 | 1469 else |
| 1470 p = NULL; | |
| 1471 if (allow_name_expansion) | |
| 1472 pfile->state.prevent_expansion++; | |
| 1473 count = 2; | |
| 1474 } | |
| 1475 } | |
| 1476 | |
| 1477 if (p) | |
| 1478 { | |
| 1479 if (p->is_deferred) | |
| 1480 { | |
| 111 | 1481 pfile->directive_result.src_loc = pragma_token_virt_loc; |
| 0 | 1482 pfile->directive_result.type = CPP_PRAGMA; |
| 1483 pfile->directive_result.flags = pragma_token->flags; | |
| 1484 pfile->directive_result.val.pragma = p->u.ident; | |
| 1485 pfile->state.in_deferred_pragma = true; | |
| 1486 pfile->state.pragma_allow_expansion = p->allow_expansion; | |
| 1487 if (!p->allow_expansion) | |
| 1488 pfile->state.prevent_expansion++; | |
| 1489 } | |
| 1490 else | |
| 1491 { | |
| 1492 /* Since the handler below doesn't get the line number, that | |
| 1493 it might need for diagnostics, make sure it has the right | |
| 1494 numbers in place. */ | |
| 1495 if (pfile->cb.line_change) | |
| 1496 (*pfile->cb.line_change) (pfile, pragma_token, false); | |
| 1497 if (p->allow_expansion) | |
| 1498 pfile->state.prevent_expansion--; | |
| 1499 (*p->u.handler) (pfile); | |
| 1500 if (p->allow_expansion) | |
| 1501 pfile->state.prevent_expansion++; | |
| 1502 } | |
| 1503 } | |
| 1504 else if (pfile->cb.def_pragma) | |
| 1505 { | |
| 1506 if (count == 1 || pfile->context->prev == NULL) | |
| 1507 _cpp_backup_tokens (pfile, count); | |
| 1508 else | |
| 1509 { | |
| 1510 /* Invalid name comes from macro expansion, _cpp_backup_tokens | |
| 1511 won't allow backing 2 tokens. */ | |
| 1512 /* ??? The token buffer is leaked. Perhaps if def_pragma hook | |
| 1513 reads both tokens, we could perhaps free it, but if it doesn't, | |
| 1514 we don't know the exact lifespan. */ | |
| 1515 cpp_token *toks = XNEWVEC (cpp_token, 2); | |
| 1516 toks[0] = ns_token; | |
| 1517 toks[0].flags |= NO_EXPAND; | |
| 1518 toks[1] = *token; | |
| 1519 toks[1].flags |= NO_EXPAND; | |
| 1520 _cpp_push_token_context (pfile, NULL, toks, 2); | |
| 1521 } | |
| 1522 pfile->cb.def_pragma (pfile, pfile->directive_line); | |
| 1523 } | |
| 1524 | |
| 1525 pfile->state.prevent_expansion--; | |
| 1526 } | |
| 1527 | |
| 1528 /* Handle #pragma once. */ | |
| 1529 static void | |
| 1530 do_pragma_once (cpp_reader *pfile) | |
| 1531 { | |
| 1532 if (cpp_in_primary_file (pfile)) | |
| 1533 cpp_error (pfile, CPP_DL_WARNING, "#pragma once in main file"); | |
| 1534 | |
|
55
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
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|
1535 check_eol (pfile, false); |
| 0 | 1536 _cpp_mark_file_once_only (pfile, pfile->buffer->file); |
| 1537 } | |
| 1538 | |
|
47
3bfb6c00c1e0
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parents:
0
diff
changeset
|
1539 /* Handle #pragma push_macro(STRING). */ |
|
3bfb6c00c1e0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1540 static void |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1541 do_pragma_push_macro (cpp_reader *pfile) |
|
3bfb6c00c1e0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1542 { |
|
67
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63
diff
changeset
|
1543 cpp_hashnode *node; |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
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|
1544 size_t defnlen; |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1545 const uchar *defn = NULL; |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1546 char *macroname, *dest; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1547 const char *limit, *src; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1548 const cpp_token *txt; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1549 struct def_pragma_macro *c; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1550 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1551 txt = get__Pragma_string (pfile); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1552 if (!txt) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1553 { |
| 145 | 1554 location_t src_loc = pfile->cur_token[-1].src_loc; |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1555 cpp_error_with_line (pfile, CPP_DL_ERROR, src_loc, 0, |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1556 "invalid #pragma push_macro directive"); |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1557 check_eol (pfile, false); |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1558 skip_rest_of_line (pfile); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1559 return; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1560 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1561 dest = macroname = (char *) alloca (txt->val.str.len + 2); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1562 src = (const char *) (txt->val.str.text + 1 + (txt->val.str.text[0] == 'L')); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1563 limit = (const char *) (txt->val.str.text + txt->val.str.len - 1); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1564 while (src < limit) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1565 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1566 /* We know there is a character following the backslash. */ |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1567 if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1568 src++; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1569 *dest++ = *src++; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1570 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1571 *dest = 0; |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1572 check_eol (pfile, false); |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1573 skip_rest_of_line (pfile); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1574 c = XNEW (struct def_pragma_macro); |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1575 memset (c, 0, sizeof (struct def_pragma_macro)); |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1576 c->name = XNEWVAR (char, strlen (macroname) + 1); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1577 strcpy (c->name, macroname); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1578 c->next = pfile->pushed_macros; |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1579 node = _cpp_lex_identifier (pfile, c->name); |
|
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
|
1580 if (node->type == NT_VOID) |
|
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
|
1581 c->is_undef = 1; |
| 145 | 1582 else if (node->type == NT_BUILTIN_MACRO) |
| 1583 c->is_builtin = 1; | |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1584 else |
|
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
|
1585 { |
|
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
|
1586 defn = cpp_macro_definition (pfile, node); |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1587 defnlen = ustrlen (defn); |
|
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
|
1588 c->definition = XNEWVEC (uchar, defnlen + 2); |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1589 c->definition[defnlen] = '\n'; |
|
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
|
1590 c->definition[defnlen + 1] = 0; |
|
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
|
1591 c->line = node->value.macro->line; |
|
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
|
1592 c->syshdr = node->value.macro->syshdr; |
|
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
|
1593 c->used = node->value.macro->used; |
|
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
|
1594 memcpy (c->definition, defn, defnlen); |
|
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
|
1595 } |
|
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
|
1596 |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1597 pfile->pushed_macros = c; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1598 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1599 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1600 /* Handle #pragma pop_macro(STRING). */ |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1601 static void |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1602 do_pragma_pop_macro (cpp_reader *pfile) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1603 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1604 char *macroname, *dest; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1605 const char *limit, *src; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1606 const cpp_token *txt; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1607 struct def_pragma_macro *l = NULL, *c = pfile->pushed_macros; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1608 txt = get__Pragma_string (pfile); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1609 if (!txt) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1610 { |
| 145 | 1611 location_t src_loc = pfile->cur_token[-1].src_loc; |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1612 cpp_error_with_line (pfile, CPP_DL_ERROR, src_loc, 0, |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1613 "invalid #pragma pop_macro directive"); |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1614 check_eol (pfile, false); |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1615 skip_rest_of_line (pfile); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1616 return; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1617 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1618 dest = macroname = (char *) alloca (txt->val.str.len + 2); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1619 src = (const char *) (txt->val.str.text + 1 + (txt->val.str.text[0] == 'L')); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1620 limit = (const char *) (txt->val.str.text + txt->val.str.len - 1); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1621 while (src < limit) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1622 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1623 /* We know there is a character following the backslash. */ |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1624 if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1625 src++; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1626 *dest++ = *src++; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1627 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1628 *dest = 0; |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1629 check_eol (pfile, false); |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1630 skip_rest_of_line (pfile); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1631 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1632 while (c != NULL) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1633 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1634 if (!strcmp (c->name, macroname)) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1635 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1636 if (!l) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1637 pfile->pushed_macros = c->next; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1638 else |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1639 l->next = c->next; |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1640 cpp_pop_definition (pfile, c); |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1641 free (c->definition); |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1642 free (c->name); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1643 free (c); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1644 break; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1645 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1646 l = c; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1647 c = c->next; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1648 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1649 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1650 |
| 0 | 1651 /* Handle #pragma GCC poison, to poison one or more identifiers so |
| 1652 that the lexer produces a hard error for each subsequent usage. */ | |
| 1653 static void | |
| 1654 do_pragma_poison (cpp_reader *pfile) | |
| 1655 { | |
| 1656 const cpp_token *tok; | |
| 1657 cpp_hashnode *hp; | |
| 1658 | |
| 1659 pfile->state.poisoned_ok = 1; | |
| 1660 for (;;) | |
| 1661 { | |
| 1662 tok = _cpp_lex_token (pfile); | |
| 1663 if (tok->type == CPP_EOF) | |
| 1664 break; | |
| 1665 if (tok->type != CPP_NAME) | |
| 1666 { | |
| 1667 cpp_error (pfile, CPP_DL_ERROR, | |
| 1668 "invalid #pragma GCC poison directive"); | |
| 1669 break; | |
| 1670 } | |
| 1671 | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1672 hp = tok->val.node.node; |
| 0 | 1673 if (hp->flags & NODE_POISONED) |
| 1674 continue; | |
| 1675 | |
| 131 | 1676 if (cpp_macro_p (hp)) |
| 0 | 1677 cpp_error (pfile, CPP_DL_WARNING, "poisoning existing macro \"%s\"", |
| 1678 NODE_NAME (hp)); | |
| 1679 _cpp_free_definition (hp); | |
| 1680 hp->flags |= NODE_POISONED | NODE_DIAGNOSTIC; | |
| 1681 } | |
| 1682 pfile->state.poisoned_ok = 0; | |
| 1683 } | |
| 1684 | |
| 1685 /* Mark the current header as a system header. This will suppress | |
| 1686 some categories of warnings (notably those from -pedantic). It is | |
| 1687 intended for use in system libraries that cannot be implemented in | |
| 1688 conforming C, but cannot be certain that their headers appear in a | |
| 1689 system include directory. To prevent abuse, it is rejected in the | |
| 1690 primary source file. */ | |
| 1691 static void | |
| 1692 do_pragma_system_header (cpp_reader *pfile) | |
| 1693 { | |
| 1694 if (cpp_in_primary_file (pfile)) | |
| 1695 cpp_error (pfile, CPP_DL_WARNING, | |
| 1696 "#pragma system_header ignored outside include file"); | |
| 1697 else | |
| 1698 { | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1699 check_eol (pfile, false); |
| 0 | 1700 skip_rest_of_line (pfile); |
| 1701 cpp_make_system_header (pfile, 1, 0); | |
| 1702 } | |
| 1703 } | |
| 1704 | |
| 1705 /* Check the modified date of the current include file against a specified | |
| 1706 file. Issue a diagnostic, if the specified file is newer. We use this to | |
| 1707 determine if a fixed header should be refixed. */ | |
| 1708 static void | |
| 1709 do_pragma_dependency (cpp_reader *pfile) | |
| 1710 { | |
| 1711 const char *fname; | |
| 1712 int angle_brackets, ordering; | |
| 145 | 1713 location_t location; |
| 0 | 1714 |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1715 fname = parse_include (pfile, &angle_brackets, NULL, &location); |
| 0 | 1716 if (!fname) |
| 1717 return; | |
| 1718 | |
| 1719 ordering = _cpp_compare_file_date (pfile, fname, angle_brackets); | |
| 1720 if (ordering < 0) | |
| 1721 cpp_error (pfile, CPP_DL_WARNING, "cannot find source file %s", fname); | |
| 1722 else if (ordering > 0) | |
| 1723 { | |
| 1724 cpp_error (pfile, CPP_DL_WARNING, | |
| 1725 "current file is older than %s", fname); | |
| 1726 if (cpp_get_token (pfile)->type != CPP_EOF) | |
| 1727 { | |
| 1728 _cpp_backup_tokens (pfile, 1); | |
| 131 | 1729 do_diagnostic (pfile, CPP_DL_WARNING, CPP_W_NONE, 0); |
| 0 | 1730 } |
| 1731 } | |
| 1732 | |
| 1733 free ((void *) fname); | |
| 1734 } | |
| 1735 | |
| 111 | 1736 /* Issue a diagnostic with the message taken from the pragma. If |
| 1737 ERROR is true, the diagnostic is a warning, otherwise, it is an | |
| 1738 error. */ | |
| 1739 static void | |
| 1740 do_pragma_warning_or_error (cpp_reader *pfile, bool error) | |
| 1741 { | |
| 1742 const cpp_token *tok = _cpp_lex_token (pfile); | |
| 1743 cpp_string str; | |
| 1744 if (tok->type != CPP_STRING | |
| 1745 || !cpp_interpret_string_notranslate (pfile, &tok->val.str, 1, &str, | |
| 1746 CPP_STRING) | |
| 1747 || str.len == 0) | |
| 1748 { | |
| 1749 cpp_error (pfile, CPP_DL_ERROR, "invalid \"#pragma GCC %s\" directive", | |
| 1750 error ? "error" : "warning"); | |
| 1751 return; | |
| 1752 } | |
| 1753 cpp_error (pfile, error ? CPP_DL_ERROR : CPP_DL_WARNING, | |
| 1754 "%s", str.text); | |
| 1755 free ((void *)str.text); | |
| 1756 } | |
| 1757 | |
| 1758 /* Issue a warning diagnostic. */ | |
| 1759 static void | |
| 1760 do_pragma_warning (cpp_reader *pfile) | |
| 1761 { | |
| 1762 do_pragma_warning_or_error (pfile, false); | |
| 1763 } | |
| 1764 | |
| 1765 /* Issue an error diagnostic. */ | |
| 1766 static void | |
| 1767 do_pragma_error (cpp_reader *pfile) | |
| 1768 { | |
| 1769 do_pragma_warning_or_error (pfile, true); | |
| 1770 } | |
| 1771 | |
| 0 | 1772 /* Get a token but skip padding. */ |
| 1773 static const cpp_token * | |
| 1774 get_token_no_padding (cpp_reader *pfile) | |
| 1775 { | |
| 1776 for (;;) | |
| 1777 { | |
| 1778 const cpp_token *result = cpp_get_token (pfile); | |
| 1779 if (result->type != CPP_PADDING) | |
| 1780 return result; | |
| 1781 } | |
| 1782 } | |
| 1783 | |
| 1784 /* Check syntax is "(string-literal)". Returns the string on success, | |
| 1785 or NULL on failure. */ | |
| 1786 static const cpp_token * | |
| 1787 get__Pragma_string (cpp_reader *pfile) | |
| 1788 { | |
| 1789 const cpp_token *string; | |
| 1790 const cpp_token *paren; | |
| 1791 | |
| 1792 paren = get_token_no_padding (pfile); | |
| 1793 if (paren->type == CPP_EOF) | |
| 1794 _cpp_backup_tokens (pfile, 1); | |
| 1795 if (paren->type != CPP_OPEN_PAREN) | |
| 1796 return NULL; | |
| 1797 | |
| 1798 string = get_token_no_padding (pfile); | |
| 1799 if (string->type == CPP_EOF) | |
| 1800 _cpp_backup_tokens (pfile, 1); | |
| 1801 if (string->type != CPP_STRING && string->type != CPP_WSTRING | |
|
55
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update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1802 && string->type != CPP_STRING32 && string->type != CPP_STRING16 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1803 && string->type != CPP_UTF8STRING) |
| 0 | 1804 return NULL; |
| 1805 | |
| 1806 paren = get_token_no_padding (pfile); | |
| 1807 if (paren->type == CPP_EOF) | |
| 1808 _cpp_backup_tokens (pfile, 1); | |
| 1809 if (paren->type != CPP_CLOSE_PAREN) | |
| 1810 return NULL; | |
| 1811 | |
| 1812 return string; | |
| 1813 } | |
| 1814 | |
| 1815 /* Destringize IN into a temporary buffer, by removing the first \ of | |
| 1816 \" and \\ sequences, and process the result as a #pragma directive. */ | |
| 1817 static void | |
| 111 | 1818 destringize_and_run (cpp_reader *pfile, const cpp_string *in, |
| 145 | 1819 location_t expansion_loc) |
| 0 | 1820 { |
| 1821 const unsigned char *src, *limit; | |
| 1822 char *dest, *result; | |
| 1823 cpp_context *saved_context; | |
| 1824 cpp_token *saved_cur_token; | |
| 1825 tokenrun *saved_cur_run; | |
| 1826 cpp_token *toks; | |
| 1827 int count; | |
| 1828 const struct directive *save_directive; | |
| 1829 | |
| 1830 dest = result = (char *) alloca (in->len - 1); | |
| 1831 src = in->text + 1 + (in->text[0] == 'L'); | |
| 1832 limit = in->text + in->len - 1; | |
| 1833 while (src < limit) | |
| 1834 { | |
| 1835 /* We know there is a character following the backslash. */ | |
| 1836 if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
| 1837 src++; | |
| 1838 *dest++ = *src++; | |
| 1839 } | |
| 1840 *dest = '\n'; | |
| 1841 | |
| 1842 /* Ugh; an awful kludge. We are really not set up to be lexing | |
| 1843 tokens when in the middle of a macro expansion. Use a new | |
| 1844 context to force cpp_get_token to lex, and so skip_rest_of_line | |
| 1845 doesn't go beyond the end of the text. Also, remember the | |
| 1846 current lexing position so we can return to it later. | |
| 1847 | |
| 1848 Something like line-at-a-time lexing should remove the need for | |
| 1849 this. */ | |
| 1850 saved_context = pfile->context; | |
| 1851 saved_cur_token = pfile->cur_token; | |
| 1852 saved_cur_run = pfile->cur_run; | |
| 1853 | |
| 111 | 1854 pfile->context = XCNEW (cpp_context); |
| 0 | 1855 |
| 1856 /* Inline run_directive, since we need to delay the _cpp_pop_buffer | |
| 1857 until we've read all of the tokens that we want. */ | |
| 1858 cpp_push_buffer (pfile, (const uchar *) result, dest - result, | |
| 1859 /* from_stage3 */ true); | |
| 1860 /* ??? Antique Disgusting Hack. What does this do? */ | |
| 1861 if (pfile->buffer->prev) | |
| 1862 pfile->buffer->file = pfile->buffer->prev->file; | |
| 1863 | |
| 1864 start_directive (pfile); | |
| 1865 _cpp_clean_line (pfile); | |
| 1866 save_directive = pfile->directive; | |
| 1867 pfile->directive = &dtable[T_PRAGMA]; | |
| 1868 do_pragma (pfile); | |
| 1869 end_directive (pfile, 1); | |
| 1870 pfile->directive = save_directive; | |
| 1871 | |
| 1872 /* We always insert at least one token, the directive result. It'll | |
| 1873 either be a CPP_PADDING or a CPP_PRAGMA. In the later case, we | |
| 1874 need to insert *all* of the tokens, including the CPP_PRAGMA_EOL. */ | |
| 1875 | |
| 1876 /* If we're not handling the pragma internally, read all of the tokens from | |
| 1877 the string buffer now, while the string buffer is still installed. */ | |
| 1878 /* ??? Note that the token buffer allocated here is leaked. It's not clear | |
| 1879 to me what the true lifespan of the tokens are. It would appear that | |
| 1880 the lifespan is the entire parse of the main input stream, in which case | |
| 1881 this may not be wrong. */ | |
| 1882 if (pfile->directive_result.type == CPP_PRAGMA) | |
| 1883 { | |
| 1884 int maxcount; | |
| 1885 | |
| 1886 count = 1; | |
| 1887 maxcount = 50; | |
| 1888 toks = XNEWVEC (cpp_token, maxcount); | |
| 1889 toks[0] = pfile->directive_result; | |
| 1890 | |
| 1891 do | |
| 1892 { | |
| 1893 if (count == maxcount) | |
| 1894 { | |
| 1895 maxcount = maxcount * 3 / 2; | |
| 1896 toks = XRESIZEVEC (cpp_token, toks, maxcount); | |
| 1897 } | |
| 1898 toks[count] = *cpp_get_token (pfile); | |
| 111 | 1899 /* _Pragma is a builtin, so we're not within a macro-map, and so |
| 1900 the token locations are set to bogus ordinary locations | |
| 1901 near to, but after that of the "_Pragma". | |
| 1902 Paper over this by setting them equal to the location of the | |
| 1903 _Pragma itself (PR preprocessor/69126). */ | |
| 1904 toks[count].src_loc = expansion_loc; | |
| 0 | 1905 /* Macros have been already expanded by cpp_get_token |
| 1906 if the pragma allowed expansion. */ | |
| 1907 toks[count++].flags |= NO_EXPAND; | |
| 1908 } | |
| 1909 while (toks[count-1].type != CPP_PRAGMA_EOL); | |
| 1910 } | |
| 1911 else | |
| 1912 { | |
| 1913 count = 1; | |
| 1914 toks = XNEW (cpp_token); | |
| 1915 toks[0] = pfile->directive_result; | |
| 1916 | |
| 1917 /* If we handled the entire pragma internally, make sure we get the | |
| 1918 line number correct for the next token. */ | |
| 1919 if (pfile->cb.line_change) | |
| 1920 pfile->cb.line_change (pfile, pfile->cur_token, false); | |
| 1921 } | |
| 1922 | |
| 1923 /* Finish inlining run_directive. */ | |
| 1924 pfile->buffer->file = NULL; | |
| 1925 _cpp_pop_buffer (pfile); | |
| 1926 | |
| 1927 /* Reset the old macro state before ... */ | |
| 1928 XDELETE (pfile->context); | |
| 1929 pfile->context = saved_context; | |
| 1930 pfile->cur_token = saved_cur_token; | |
| 1931 pfile->cur_run = saved_cur_run; | |
| 1932 | |
| 1933 /* ... inserting the new tokens we collected. */ | |
| 1934 _cpp_push_token_context (pfile, NULL, toks, count); | |
| 1935 } | |
| 1936 | |
| 1937 /* Handle the _Pragma operator. Return 0 on error, 1 if ok. */ | |
| 1938 int | |
| 145 | 1939 _cpp_do__Pragma (cpp_reader *pfile, location_t expansion_loc) |
| 0 | 1940 { |
| 1941 const cpp_token *string = get__Pragma_string (pfile); | |
| 1942 pfile->directive_result.type = CPP_PADDING; | |
| 1943 | |
| 1944 if (string) | |
| 1945 { | |
| 111 | 1946 destringize_and_run (pfile, &string->val.str, expansion_loc); |
| 0 | 1947 return 1; |
| 1948 } | |
| 1949 cpp_error (pfile, CPP_DL_ERROR, | |
| 1950 "_Pragma takes a parenthesized string literal"); | |
| 1951 return 0; | |
| 1952 } | |
| 1953 | |
| 1954 /* Handle #ifdef. */ | |
| 1955 static void | |
| 1956 do_ifdef (cpp_reader *pfile) | |
| 1957 { | |
| 1958 int skip = 1; | |
| 1959 | |
| 1960 if (! pfile->state.skipping) | |
| 1961 { | |
| 1962 cpp_hashnode *node = lex_macro_node (pfile, false); | |
| 1963 | |
| 1964 if (node) | |
| 1965 { | |
| 145 | 1966 skip = !_cpp_defined_macro_p (node); |
| 0 | 1967 _cpp_mark_macro_used (node); |
| 131 | 1968 _cpp_maybe_notify_macro_use (pfile, node); |
|
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1969 if (pfile->cb.used) |
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1970 pfile->cb.used (pfile, pfile->directive_line, node); |
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1971 check_eol (pfile, false); |
| 0 | 1972 } |
| 1973 } | |
| 1974 | |
| 1975 push_conditional (pfile, skip, T_IFDEF, 0); | |
| 1976 } | |
| 1977 | |
| 1978 /* Handle #ifndef. */ | |
| 1979 static void | |
| 1980 do_ifndef (cpp_reader *pfile) | |
| 1981 { | |
| 1982 int skip = 1; | |
| 1983 cpp_hashnode *node = 0; | |
| 1984 | |
| 1985 if (! pfile->state.skipping) | |
| 1986 { | |
| 1987 node = lex_macro_node (pfile, false); | |
| 1988 | |
| 1989 if (node) | |
| 1990 { | |
| 111 | 1991 /* Do not treat conditional macros as being defined. This is due to |
| 145 | 1992 the powerpc port using conditional macros for 'vector', 'bool', |
| 1993 and 'pixel' to act as conditional keywords. This messes up tests | |
| 1994 like #ifndef bool. */ | |
| 1995 skip = _cpp_defined_macro_p (node); | |
| 0 | 1996 _cpp_mark_macro_used (node); |
| 131 | 1997 _cpp_maybe_notify_macro_use (pfile, node); |
|
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1998 if (pfile->cb.used) |
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1999 pfile->cb.used (pfile, pfile->directive_line, node); |
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2000 check_eol (pfile, false); |
| 0 | 2001 } |
| 2002 } | |
| 2003 | |
| 2004 push_conditional (pfile, skip, T_IFNDEF, node); | |
| 2005 } | |
| 2006 | |
| 2007 /* _cpp_parse_expr puts a macro in a "#if !defined ()" expression in | |
| 2008 pfile->mi_ind_cmacro so we can handle multiple-include | |
| 2009 optimizations. If macro expansion occurs in the expression, we | |
| 2010 cannot treat it as a controlling conditional, since the expansion | |
| 2011 could change in the future. That is handled by cpp_get_token. */ | |
| 2012 static void | |
| 2013 do_if (cpp_reader *pfile) | |
| 2014 { | |
| 2015 int skip = 1; | |
| 2016 | |
| 2017 if (! pfile->state.skipping) | |
| 2018 skip = _cpp_parse_expr (pfile, true) == false; | |
| 2019 | |
| 2020 push_conditional (pfile, skip, T_IF, pfile->mi_ind_cmacro); | |
| 2021 } | |
| 2022 | |
| 2023 /* Flip skipping state if appropriate and continue without changing | |
| 2024 if_stack; this is so that the error message for missing #endif's | |
| 2025 etc. will point to the original #if. */ | |
| 2026 static void | |
| 2027 do_else (cpp_reader *pfile) | |
| 2028 { | |
| 2029 cpp_buffer *buffer = pfile->buffer; | |
| 2030 struct if_stack *ifs = buffer->if_stack; | |
| 2031 | |
| 2032 if (ifs == NULL) | |
| 2033 cpp_error (pfile, CPP_DL_ERROR, "#else without #if"); | |
| 2034 else | |
| 2035 { | |
| 2036 if (ifs->type == T_ELSE) | |
| 2037 { | |
| 2038 cpp_error (pfile, CPP_DL_ERROR, "#else after #else"); | |
| 2039 cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
| 2040 "the conditional began here"); | |
| 2041 } | |
| 2042 ifs->type = T_ELSE; | |
| 2043 | |
| 2044 /* Skip any future (erroneous) #elses or #elifs. */ | |
| 2045 pfile->state.skipping = ifs->skip_elses; | |
| 2046 ifs->skip_elses = true; | |
| 2047 | |
| 2048 /* Invalidate any controlling macro. */ | |
| 2049 ifs->mi_cmacro = 0; | |
| 2050 | |
| 2051 /* Only check EOL if was not originally skipping. */ | |
| 2052 if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) | |
| 111 | 2053 check_eol_endif_labels (pfile); |
| 0 | 2054 } |
| 2055 } | |
| 2056 | |
| 2057 /* Handle a #elif directive by not changing if_stack either. See the | |
| 2058 comment above do_else. */ | |
| 2059 static void | |
| 2060 do_elif (cpp_reader *pfile) | |
| 2061 { | |
| 2062 cpp_buffer *buffer = pfile->buffer; | |
| 2063 struct if_stack *ifs = buffer->if_stack; | |
| 2064 | |
| 2065 if (ifs == NULL) | |
| 2066 cpp_error (pfile, CPP_DL_ERROR, "#elif without #if"); | |
| 2067 else | |
| 2068 { | |
| 2069 if (ifs->type == T_ELSE) | |
| 2070 { | |
| 2071 cpp_error (pfile, CPP_DL_ERROR, "#elif after #else"); | |
| 2072 cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
| 2073 "the conditional began here"); | |
| 2074 } | |
| 2075 ifs->type = T_ELIF; | |
| 2076 | |
| 111 | 2077 /* See DR#412: "Only the first group whose control condition |
| 2078 evaluates to true (nonzero) is processed; any following groups | |
| 2079 are skipped and their controlling directives are processed as | |
| 2080 if they were in a group that is skipped." */ | |
| 2081 if (ifs->skip_elses) | |
| 2082 pfile->state.skipping = 1; | |
| 2083 else | |
| 0 | 2084 { |
| 111 | 2085 pfile->state.skipping = ! _cpp_parse_expr (pfile, false); |
| 2086 ifs->skip_elses = ! pfile->state.skipping; | |
| 0 | 2087 } |
| 2088 | |
| 2089 /* Invalidate any controlling macro. */ | |
| 2090 ifs->mi_cmacro = 0; | |
| 2091 } | |
| 2092 } | |
| 2093 | |
| 2094 /* #endif pops the if stack and resets pfile->state.skipping. */ | |
| 2095 static void | |
| 2096 do_endif (cpp_reader *pfile) | |
| 2097 { | |
| 2098 cpp_buffer *buffer = pfile->buffer; | |
| 2099 struct if_stack *ifs = buffer->if_stack; | |
| 2100 | |
| 2101 if (ifs == NULL) | |
| 2102 cpp_error (pfile, CPP_DL_ERROR, "#endif without #if"); | |
| 2103 else | |
| 2104 { | |
| 2105 /* Only check EOL if was not originally skipping. */ | |
| 2106 if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) | |
| 111 | 2107 check_eol_endif_labels (pfile); |
| 0 | 2108 |
| 2109 /* If potential control macro, we go back outside again. */ | |
| 2110 if (ifs->next == 0 && ifs->mi_cmacro) | |
| 2111 { | |
| 2112 pfile->mi_valid = true; | |
| 2113 pfile->mi_cmacro = ifs->mi_cmacro; | |
| 2114 } | |
| 2115 | |
| 2116 buffer->if_stack = ifs->next; | |
| 2117 pfile->state.skipping = ifs->was_skipping; | |
| 2118 obstack_free (&pfile->buffer_ob, ifs); | |
| 2119 } | |
| 2120 } | |
| 2121 | |
| 2122 /* Push an if_stack entry for a preprocessor conditional, and set | |
| 2123 pfile->state.skipping to SKIP. If TYPE indicates the conditional | |
| 2124 is #if or #ifndef, CMACRO is a potentially controlling macro, and | |
| 2125 we need to check here that we are at the top of the file. */ | |
| 2126 static void | |
| 2127 push_conditional (cpp_reader *pfile, int skip, int type, | |
| 2128 const cpp_hashnode *cmacro) | |
| 2129 { | |
| 2130 struct if_stack *ifs; | |
| 2131 cpp_buffer *buffer = pfile->buffer; | |
| 2132 | |
| 2133 ifs = XOBNEW (&pfile->buffer_ob, struct if_stack); | |
| 2134 ifs->line = pfile->directive_line; | |
| 2135 ifs->next = buffer->if_stack; | |
| 2136 ifs->skip_elses = pfile->state.skipping || !skip; | |
| 2137 ifs->was_skipping = pfile->state.skipping; | |
| 2138 ifs->type = type; | |
| 2139 /* This condition is effectively a test for top-of-file. */ | |
| 2140 if (pfile->mi_valid && pfile->mi_cmacro == 0) | |
| 2141 ifs->mi_cmacro = cmacro; | |
| 2142 else | |
| 2143 ifs->mi_cmacro = 0; | |
| 2144 | |
| 2145 pfile->state.skipping = skip; | |
| 2146 buffer->if_stack = ifs; | |
| 2147 } | |
| 2148 | |
| 2149 /* Read the tokens of the answer into the macro pool, in a directive | |
| 2150 of type TYPE. Only commit the memory if we intend it as permanent | |
| 2151 storage, i.e. the #assert case. Returns 0 on success, and sets | |
|
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2152 ANSWERP to point to the answer. PRED_LOC is the location of the |
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2153 predicate. */ |
| 131 | 2154 static bool |
| 145 | 2155 parse_answer (cpp_reader *pfile, int type, location_t pred_loc, |
| 131 | 2156 cpp_macro **answer_ptr) |
| 0 | 2157 { |
| 2158 /* In a conditional, it is legal to not have an open paren. We | |
| 2159 should save the following token in this case. */ | |
| 131 | 2160 const cpp_token *paren = cpp_get_token (pfile); |
| 0 | 2161 |
| 2162 /* If not a paren, see if we're OK. */ | |
| 2163 if (paren->type != CPP_OPEN_PAREN) | |
| 2164 { | |
| 2165 /* In a conditional no answer is a test for any answer. It | |
| 2166 could be followed by any token. */ | |
| 2167 if (type == T_IF) | |
| 2168 { | |
| 2169 _cpp_backup_tokens (pfile, 1); | |
| 131 | 2170 return true; |
| 0 | 2171 } |
| 2172 | |
| 2173 /* #unassert with no answer is valid - it removes all answers. */ | |
| 2174 if (type == T_UNASSERT && paren->type == CPP_EOF) | |
| 131 | 2175 return true; |
| 0 | 2176 |
|
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2177 cpp_error_with_line (pfile, CPP_DL_ERROR, pred_loc, 0, |
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2178 "missing '(' after predicate"); |
| 131 | 2179 return false; |
| 0 | 2180 } |
| 2181 | |
| 131 | 2182 cpp_macro *answer = _cpp_new_macro (pfile, cmk_assert, |
| 2183 _cpp_reserve_room (pfile, 0, | |
| 2184 sizeof (cpp_macro))); | |
| 2185 answer->parm.next = NULL; | |
| 2186 unsigned count = 0; | |
| 2187 for (;;) | |
| 0 | 2188 { |
| 2189 const cpp_token *token = cpp_get_token (pfile); | |
| 2190 | |
| 2191 if (token->type == CPP_CLOSE_PAREN) | |
| 2192 break; | |
| 2193 | |
| 2194 if (token->type == CPP_EOF) | |
| 2195 { | |
| 2196 cpp_error (pfile, CPP_DL_ERROR, "missing ')' to complete answer"); | |
| 131 | 2197 return false; |
| 0 | 2198 } |
| 2199 | |
| 131 | 2200 answer = (cpp_macro *)_cpp_reserve_room |
| 2201 (pfile, sizeof (cpp_macro) + count * sizeof (cpp_token), | |
| 2202 sizeof (cpp_token)); | |
| 2203 answer->exp.tokens[count++] = *token; | |
| 0 | 2204 } |
| 2205 | |
| 131 | 2206 if (!count) |
| 0 | 2207 { |
| 2208 cpp_error (pfile, CPP_DL_ERROR, "predicate's answer is empty"); | |
| 131 | 2209 return false; |
| 0 | 2210 } |
| 2211 | |
| 131 | 2212 /* Drop whitespace at start, for answer equivalence purposes. */ |
| 2213 answer->exp.tokens[0].flags &= ~PREV_WHITE; | |
| 0 | 2214 |
| 131 | 2215 answer->count = count; |
| 2216 *answer_ptr = answer; | |
| 2217 | |
| 2218 return true; | |
| 0 | 2219 } |
| 2220 | |
| 2221 /* Parses an assertion directive of type TYPE, returning a pointer to | |
| 131 | 2222 the hash node of the predicate, or 0 on error. The node is |
| 2223 guaranteed to be disjoint from the macro namespace, so can only | |
| 2224 have type 'NT_VOID'. If an answer was supplied, it is placed in | |
| 2225 *ANSWER_PTR, which is otherwise set to 0. */ | |
| 0 | 2226 static cpp_hashnode * |
| 131 | 2227 parse_assertion (cpp_reader *pfile, int type, cpp_macro **answer_ptr) |
| 0 | 2228 { |
| 2229 cpp_hashnode *result = 0; | |
| 2230 | |
| 2231 /* We don't expand predicates or answers. */ | |
| 2232 pfile->state.prevent_expansion++; | |
| 2233 | |
| 131 | 2234 *answer_ptr = NULL; |
| 2235 | |
| 2236 const cpp_token *predicate = cpp_get_token (pfile); | |
| 0 | 2237 if (predicate->type == CPP_EOF) |
| 2238 cpp_error (pfile, CPP_DL_ERROR, "assertion without predicate"); | |
| 2239 else if (predicate->type != CPP_NAME) | |
|
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2240 cpp_error_with_line (pfile, CPP_DL_ERROR, predicate->src_loc, 0, |
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2241 "predicate must be an identifier"); |
| 131 | 2242 else if (parse_answer (pfile, type, predicate->src_loc, answer_ptr)) |
| 0 | 2243 { |
|
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2244 unsigned int len = NODE_LEN (predicate->val.node.node); |
| 0 | 2245 unsigned char *sym = (unsigned char *) alloca (len + 1); |
| 2246 | |
| 2247 /* Prefix '#' to get it out of macro namespace. */ | |
| 2248 sym[0] = '#'; | |
|
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2249 memcpy (sym + 1, NODE_NAME (predicate->val.node.node), len); |
| 0 | 2250 result = cpp_lookup (pfile, sym, len + 1); |
| 2251 } | |
| 2252 | |
| 2253 pfile->state.prevent_expansion--; | |
| 131 | 2254 |
| 0 | 2255 return result; |
| 2256 } | |
| 2257 | |
| 2258 /* Returns a pointer to the pointer to CANDIDATE in the answer chain, | |
| 2259 or a pointer to NULL if the answer is not in the chain. */ | |
| 131 | 2260 static cpp_macro ** |
| 2261 find_answer (cpp_hashnode *node, const cpp_macro *candidate) | |
| 0 | 2262 { |
| 2263 unsigned int i; | |
| 131 | 2264 cpp_macro **result = NULL; |
| 0 | 2265 |
| 131 | 2266 for (result = &node->value.answers; *result; result = &(*result)->parm.next) |
| 0 | 2267 { |
| 131 | 2268 cpp_macro *answer = *result; |
| 0 | 2269 |
| 2270 if (answer->count == candidate->count) | |
| 2271 { | |
| 2272 for (i = 0; i < answer->count; i++) | |
| 131 | 2273 if (!_cpp_equiv_tokens (&answer->exp.tokens[i], |
| 2274 &candidate->exp.tokens[i])) | |
| 0 | 2275 break; |
| 2276 | |
| 2277 if (i == answer->count) | |
| 2278 break; | |
| 2279 } | |
| 2280 } | |
| 2281 | |
| 2282 return result; | |
| 2283 } | |
| 2284 | |
| 2285 /* Test an assertion within a preprocessor conditional. Returns | |
| 2286 nonzero on failure, zero on success. On success, the result of | |
| 2287 the test is written into VALUE, otherwise the value 0. */ | |
| 2288 int | |
| 2289 _cpp_test_assertion (cpp_reader *pfile, unsigned int *value) | |
| 2290 { | |
| 131 | 2291 cpp_macro *answer; |
| 2292 cpp_hashnode *node = parse_assertion (pfile, T_IF, &answer); | |
| 0 | 2293 |
| 2294 /* For recovery, an erroneous assertion expression is handled as a | |
| 2295 failing assertion. */ | |
| 2296 *value = 0; | |
| 2297 | |
| 2298 if (node) | |
| 131 | 2299 { |
| 2300 if (node->value.answers) | |
| 2301 *value = !answer || *find_answer (node, answer); | |
| 2302 } | |
| 0 | 2303 else if (pfile->cur_token[-1].type == CPP_EOF) |
| 2304 _cpp_backup_tokens (pfile, 1); | |
| 2305 | |
| 2306 /* We don't commit the memory for the answer - it's temporary only. */ | |
| 2307 return node == 0; | |
| 2308 } | |
| 2309 | |
| 2310 /* Handle #assert. */ | |
| 2311 static void | |
| 2312 do_assert (cpp_reader *pfile) | |
| 2313 { | |
| 131 | 2314 cpp_macro *answer; |
| 2315 cpp_hashnode *node = parse_assertion (pfile, T_ASSERT, &answer); | |
| 0 | 2316 |
| 2317 if (node) | |
| 2318 { | |
| 2319 /* Place the new answer in the answer list. First check there | |
| 2320 is not a duplicate. */ | |
| 131 | 2321 if (*find_answer (node, answer)) |
| 0 | 2322 { |
| 131 | 2323 cpp_error (pfile, CPP_DL_WARNING, "\"%s\" re-asserted", |
| 2324 NODE_NAME (node) + 1); | |
| 2325 return; | |
| 0 | 2326 } |
| 2327 | |
| 131 | 2328 /* Commit or allocate storage for the answer. */ |
| 2329 answer = (cpp_macro *)_cpp_commit_buff | |
| 2330 (pfile, sizeof (cpp_macro) - sizeof (cpp_token) | |
| 2331 + sizeof (cpp_token) * answer->count); | |
| 0 | 2332 |
| 131 | 2333 /* Chain into the list. */ |
| 2334 answer->parm.next = node->value.answers; | |
| 2335 node->value.answers = answer; | |
| 2336 | |
|
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|
2337 check_eol (pfile, false); |
| 0 | 2338 } |
| 2339 } | |
| 2340 | |
| 2341 /* Handle #unassert. */ | |
| 2342 static void | |
| 2343 do_unassert (cpp_reader *pfile) | |
| 2344 { | |
| 131 | 2345 cpp_macro *answer; |
| 2346 cpp_hashnode *node = parse_assertion (pfile, T_UNASSERT, &answer); | |
| 0 | 2347 |
| 2348 /* It isn't an error to #unassert something that isn't asserted. */ | |
| 131 | 2349 if (node) |
| 0 | 2350 { |
| 2351 if (answer) | |
| 2352 { | |
| 131 | 2353 cpp_macro **p = find_answer (node, answer); |
| 0 | 2354 |
| 131 | 2355 /* Remove the assert from the list. */ |
| 2356 if (cpp_macro *temp = *p) | |
| 2357 *p = temp->parm.next; | |
| 0 | 2358 |
|
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|
2359 check_eol (pfile, false); |
| 0 | 2360 } |
| 2361 else | |
| 2362 _cpp_free_definition (node); | |
| 2363 } | |
| 2364 | |
| 2365 /* We don't commit the memory for the answer - it's temporary only. */ | |
| 2366 } | |
| 2367 | |
| 2368 /* These are for -D, -U, -A. */ | |
| 2369 | |
| 2370 /* Process the string STR as if it appeared as the body of a #define. | |
| 2371 If STR is just an identifier, define it with value 1. | |
| 2372 If STR has anything after the identifier, then it should | |
| 2373 be identifier=definition. */ | |
| 2374 void | |
| 2375 cpp_define (cpp_reader *pfile, const char *str) | |
| 2376 { | |
|
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2377 char *buf; |
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2378 const char *p; |
| 0 | 2379 size_t count; |
| 2380 | |
| 2381 /* Copy the entire option so we can modify it. | |
| 2382 Change the first "=" in the string to a space. If there is none, | |
| 2383 tack " 1" on the end. */ | |
| 2384 | |
| 2385 count = strlen (str); | |
| 2386 buf = (char *) alloca (count + 3); | |
| 2387 memcpy (buf, str, count); | |
| 2388 | |
| 2389 p = strchr (str, '='); | |
| 2390 if (p) | |
| 2391 buf[p - str] = ' '; | |
| 2392 else | |
| 2393 { | |
| 2394 buf[count++] = ' '; | |
| 2395 buf[count++] = '1'; | |
| 2396 } | |
| 2397 buf[count] = '\n'; | |
| 2398 | |
| 2399 run_directive (pfile, T_DEFINE, buf, count); | |
| 2400 } | |
| 2401 | |
| 2402 | |
| 2403 /* Use to build macros to be run through cpp_define() as | |
| 2404 described above. | |
| 2405 Example: cpp_define_formatted (pfile, "MACRO=%d", value); */ | |
| 2406 | |
| 2407 void | |
| 2408 cpp_define_formatted (cpp_reader *pfile, const char *fmt, ...) | |
| 2409 { | |
| 111 | 2410 char *ptr; |
| 0 | 2411 |
| 2412 va_list ap; | |
| 2413 va_start (ap, fmt); | |
| 111 | 2414 ptr = xvasprintf (fmt, ap); |
| 0 | 2415 va_end (ap); |
| 2416 | |
| 2417 cpp_define (pfile, ptr); | |
| 2418 free (ptr); | |
| 2419 } | |
| 2420 | |
| 2421 | |
| 2422 /* Slight variant of the above for use by initialize_builtins. */ | |
| 2423 void | |
| 2424 _cpp_define_builtin (cpp_reader *pfile, const char *str) | |
| 2425 { | |
| 2426 size_t len = strlen (str); | |
| 2427 char *buf = (char *) alloca (len + 1); | |
| 2428 memcpy (buf, str, len); | |
| 2429 buf[len] = '\n'; | |
| 2430 run_directive (pfile, T_DEFINE, buf, len); | |
| 2431 } | |
| 2432 | |
| 2433 /* Process MACRO as if it appeared as the body of an #undef. */ | |
| 2434 void | |
| 2435 cpp_undef (cpp_reader *pfile, const char *macro) | |
| 2436 { | |
| 2437 size_t len = strlen (macro); | |
| 2438 char *buf = (char *) alloca (len + 1); | |
| 2439 memcpy (buf, macro, len); | |
| 2440 buf[len] = '\n'; | |
| 2441 run_directive (pfile, T_UNDEF, buf, len); | |
| 2442 } | |
| 2443 | |
|
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2444 /* Replace a previous definition DEF of the macro STR. If DEF is NULL, |
|
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2445 or first element is zero, then the macro should be undefined. */ |
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2446 static void |
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2447 cpp_pop_definition (cpp_reader *pfile, struct def_pragma_macro *c) |
| 0 | 2448 { |
|
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|
2449 cpp_hashnode *node = _cpp_lex_identifier (pfile, c->name); |
| 0 | 2450 if (node == NULL) |
| 2451 return; | |
| 2452 | |
| 2453 if (pfile->cb.before_define) | |
| 2454 pfile->cb.before_define (pfile); | |
| 2455 | |
| 131 | 2456 if (cpp_macro_p (node)) |
| 0 | 2457 { |
| 2458 if (pfile->cb.undef) | |
| 2459 pfile->cb.undef (pfile, pfile->directive_line, node); | |
| 2460 if (CPP_OPTION (pfile, warn_unused_macros)) | |
| 2461 _cpp_warn_if_unused_macro (pfile, node, NULL); | |
| 131 | 2462 _cpp_free_definition (node); |
| 0 | 2463 } |
| 2464 | |
|
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2465 if (c->is_undef) |
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|
2466 return; |
| 145 | 2467 if (c->is_builtin) |
| 2468 { | |
| 2469 _cpp_restore_special_builtin (pfile, c); | |
| 2470 return; | |
| 2471 } | |
| 131 | 2472 |
|
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|
2473 { |
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2474 size_t namelen; |
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2475 const uchar *dn; |
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2476 cpp_hashnode *h = NULL; |
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|
2477 cpp_buffer *nbuf; |
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|
2478 |
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2479 namelen = ustrcspn (c->definition, "( \n"); |
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2480 h = cpp_lookup (pfile, c->definition, namelen); |
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|
2481 dn = c->definition + namelen; |
| 0 | 2482 |
|
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2483 nbuf = cpp_push_buffer (pfile, dn, ustrchr (dn, '\n') - dn, true); |
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|
2484 if (nbuf != NULL) |
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|
2485 { |
|
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|
2486 _cpp_clean_line (pfile); |
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|
2487 nbuf->sysp = 1; |
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2488 if (!_cpp_create_definition (pfile, h)) |
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|
2489 abort (); |
|
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|
2490 _cpp_pop_buffer (pfile); |
|
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2491 } |
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|
2492 else |
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2493 abort (); |
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|
2494 h->value.macro->line = c->line; |
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2495 h->value.macro->syshdr = c->syshdr; |
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2496 h->value.macro->used = c->used; |
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|
2497 } |
| 0 | 2498 } |
| 2499 | |
| 2500 /* Process the string STR as if it appeared as the body of a #assert. */ | |
| 2501 void | |
| 2502 cpp_assert (cpp_reader *pfile, const char *str) | |
| 2503 { | |
| 2504 handle_assertion (pfile, str, T_ASSERT); | |
| 2505 } | |
| 2506 | |
| 2507 /* Process STR as if it appeared as the body of an #unassert. */ | |
| 2508 void | |
| 2509 cpp_unassert (cpp_reader *pfile, const char *str) | |
| 2510 { | |
| 2511 handle_assertion (pfile, str, T_UNASSERT); | |
| 2512 } | |
| 2513 | |
| 2514 /* Common code for cpp_assert (-A) and cpp_unassert (-A-). */ | |
| 2515 static void | |
| 2516 handle_assertion (cpp_reader *pfile, const char *str, int type) | |
| 2517 { | |
| 2518 size_t count = strlen (str); | |
| 2519 const char *p = strchr (str, '='); | |
| 2520 | |
| 2521 /* Copy the entire option so we can modify it. Change the first | |
| 2522 "=" in the string to a '(', and tack a ')' on the end. */ | |
| 2523 char *buf = (char *) alloca (count + 2); | |
| 2524 | |
| 2525 memcpy (buf, str, count); | |
| 2526 if (p) | |
| 2527 { | |
| 2528 buf[p - str] = '('; | |
| 2529 buf[count++] = ')'; | |
| 2530 } | |
| 2531 buf[count] = '\n'; | |
| 2532 str = buf; | |
| 2533 | |
| 2534 run_directive (pfile, type, str, count); | |
| 2535 } | |
| 2536 | |
| 2537 /* The options structure. */ | |
| 2538 cpp_options * | |
| 2539 cpp_get_options (cpp_reader *pfile) | |
| 2540 { | |
| 2541 return &pfile->opts; | |
| 2542 } | |
| 2543 | |
| 2544 /* The callbacks structure. */ | |
| 2545 cpp_callbacks * | |
| 2546 cpp_get_callbacks (cpp_reader *pfile) | |
| 2547 { | |
| 2548 return &pfile->cb; | |
| 2549 } | |
| 2550 | |
| 2551 /* Copy the given callbacks structure to our own. */ | |
| 2552 void | |
| 2553 cpp_set_callbacks (cpp_reader *pfile, cpp_callbacks *cb) | |
| 2554 { | |
| 2555 pfile->cb = *cb; | |
| 2556 } | |
| 2557 | |
| 2558 /* The dependencies structure. (Creates one if it hasn't already been.) */ | |
| 145 | 2559 class mkdeps * |
| 0 | 2560 cpp_get_deps (cpp_reader *pfile) |
| 2561 { | |
| 2562 if (!pfile->deps) | |
| 2563 pfile->deps = deps_init (); | |
| 2564 return pfile->deps; | |
| 2565 } | |
| 2566 | |
| 2567 /* Push a new buffer on the buffer stack. Returns the new buffer; it | |
| 2568 doesn't fail. It does not generate a file change call back; that | |
| 2569 is the responsibility of the caller. */ | |
| 2570 cpp_buffer * | |
| 2571 cpp_push_buffer (cpp_reader *pfile, const uchar *buffer, size_t len, | |
| 2572 int from_stage3) | |
| 2573 { | |
| 2574 cpp_buffer *new_buffer = XOBNEW (&pfile->buffer_ob, cpp_buffer); | |
| 2575 | |
| 2576 /* Clears, amongst other things, if_stack and mi_cmacro. */ | |
| 2577 memset (new_buffer, 0, sizeof (cpp_buffer)); | |
| 2578 | |
| 2579 new_buffer->next_line = new_buffer->buf = buffer; | |
| 2580 new_buffer->rlimit = buffer + len; | |
| 2581 new_buffer->from_stage3 = from_stage3; | |
| 2582 new_buffer->prev = pfile->buffer; | |
| 2583 new_buffer->need_line = true; | |
| 2584 | |
| 2585 pfile->buffer = new_buffer; | |
| 2586 | |
| 2587 return new_buffer; | |
| 2588 } | |
| 2589 | |
| 2590 /* Pops a single buffer, with a file change call-back if appropriate. | |
| 2591 Then pushes the next -include file, if any remain. */ | |
| 2592 void | |
| 2593 _cpp_pop_buffer (cpp_reader *pfile) | |
| 2594 { | |
| 2595 cpp_buffer *buffer = pfile->buffer; | |
| 2596 struct _cpp_file *inc = buffer->file; | |
| 2597 struct if_stack *ifs; | |
| 111 | 2598 const unsigned char *to_free; |
| 0 | 2599 |
| 2600 /* Walk back up the conditional stack till we reach its level at | |
| 2601 entry to this file, issuing error messages. */ | |
| 2602 for (ifs = buffer->if_stack; ifs; ifs = ifs->next) | |
| 2603 cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
| 2604 "unterminated #%s", dtable[ifs->type].name); | |
| 2605 | |
| 2606 /* In case of a missing #endif. */ | |
| 2607 pfile->state.skipping = 0; | |
| 2608 | |
| 2609 /* _cpp_do_file_change expects pfile->buffer to be the new one. */ | |
| 2610 pfile->buffer = buffer->prev; | |
| 2611 | |
| 111 | 2612 to_free = buffer->to_free; |
| 0 | 2613 free (buffer->notes); |
| 2614 | |
| 2615 /* Free the buffer object now; we may want to push a new buffer | |
| 2616 in _cpp_push_next_include_file. */ | |
| 2617 obstack_free (&pfile->buffer_ob, buffer); | |
| 2618 | |
| 2619 if (inc) | |
| 2620 { | |
| 111 | 2621 _cpp_pop_file_buffer (pfile, inc, to_free); |
| 0 | 2622 |
| 2623 _cpp_do_file_change (pfile, LC_LEAVE, 0, 0, 0); | |
| 2624 } | |
| 145 | 2625 else if (to_free) |
| 2626 free ((void *)to_free); | |
| 0 | 2627 } |
| 2628 | |
| 2629 /* Enter all recognized directives in the hash table. */ | |
| 2630 void | |
| 2631 _cpp_init_directives (cpp_reader *pfile) | |
| 2632 { | |
| 145 | 2633 for (int i = 0; i < N_DIRECTIVES; i++) |
| 0 | 2634 { |
| 145 | 2635 cpp_hashnode *node = cpp_lookup (pfile, dtable[i].name, dtable[i].length); |
| 0 | 2636 node->is_directive = 1; |
| 2637 node->directive_index = i; | |
| 2638 } | |
| 2639 } | |
| 111 | 2640 |
| 2641 /* Extract header file from a bracket include. Parsing starts after '<'. | |
| 2642 The string is malloced and must be freed by the caller. */ | |
| 2643 char * | |
| 2644 _cpp_bracket_include(cpp_reader *pfile) | |
| 2645 { | |
| 2646 return glue_header_name (pfile); | |
| 2647 } | |
| 2648 |