Mercurial > hg > CbC > CbC_gcc
annotate libcpp/directives.c @ 136:4627f235cf2a
fix c-next example
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Thu, 08 Nov 2018 14:11:56 +0900 |
| parents | 84e7813d76e9 |
| children | 1830386684a0 |
| rev | line source |
|---|---|
| 0 | 1 /* CPP Library. (Directive handling.) |
| 131 | 2 Copyright (C) 1986-2018 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; | |
| 111 | 33 source_location 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 ***, |
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101 source_location *); |
| 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 *, |
| 127 source_location); | |
| 131 | 128 static bool parse_answer (cpp_reader *, int, source_location, cpp_macro **); |
| 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 |
| 136 /* This is the table of directive handlers. It is ordered by | |
| 137 frequency of occurrence; the numbers at the end are directive | |
| 138 counts from all the source code I have lying around (egcs and libc | |
| 139 CVS as of 1999-05-18, plus grub-0.5.91, linux-2.2.9, and | |
| 140 pcmcia-cs-3.0.9). This is no longer important as directive lookup | |
| 141 is now O(1). All extensions other than #warning, #include_next, | |
| 142 and #import are deprecated. The name is where the extension | |
| 143 appears to have come from. */ | |
| 144 | |
| 145 #define DIRECTIVE_TABLE \ | |
| 146 D(define, T_DEFINE = 0, KANDR, IN_I) /* 270554 */ \ | |
| 147 D(include, T_INCLUDE, KANDR, INCL | EXPAND) /* 52262 */ \ | |
| 148 D(endif, T_ENDIF, KANDR, COND) /* 45855 */ \ | |
| 149 D(ifdef, T_IFDEF, KANDR, COND | IF_COND) /* 22000 */ \ | |
| 150 D(if, T_IF, KANDR, COND | IF_COND | EXPAND) /* 18162 */ \ | |
| 151 D(else, T_ELSE, KANDR, COND) /* 9863 */ \ | |
| 152 D(ifndef, T_IFNDEF, KANDR, COND | IF_COND) /* 9675 */ \ | |
| 153 D(undef, T_UNDEF, KANDR, IN_I) /* 4837 */ \ | |
| 154 D(line, T_LINE, KANDR, EXPAND) /* 2465 */ \ | |
| 155 D(elif, T_ELIF, STDC89, COND | EXPAND) /* 610 */ \ | |
| 156 D(error, T_ERROR, STDC89, 0) /* 475 */ \ | |
| 157 D(pragma, T_PRAGMA, STDC89, IN_I) /* 195 */ \ | |
| 158 D(warning, T_WARNING, EXTENSION, 0) /* 22 */ \ | |
| 159 D(include_next, T_INCLUDE_NEXT, EXTENSION, INCL | EXPAND) /* 19 */ \ | |
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160 D(ident, T_IDENT, EXTENSION, IN_I) /* 11 */ \ |
| 0 | 161 D(import, T_IMPORT, EXTENSION, INCL | EXPAND) /* 0 ObjC */ \ |
| 162 D(assert, T_ASSERT, EXTENSION, DEPRECATED) /* 0 SVR4 */ \ | |
| 163 D(unassert, T_UNASSERT, EXTENSION, DEPRECATED) /* 0 SVR4 */ \ | |
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164 D(sccs, T_SCCS, EXTENSION, IN_I) /* 0 SVR4? */ |
| 0 | 165 |
| 166 /* #sccs is synonymous with #ident. */ | |
| 167 #define do_sccs do_ident | |
| 168 | |
| 169 /* Use the table to generate a series of prototypes, an enum for the | |
| 170 directive names, and an array of directive handlers. */ | |
| 171 | |
| 172 #define D(name, t, o, f) static void do_##name (cpp_reader *); | |
| 173 DIRECTIVE_TABLE | |
| 174 #undef D | |
| 175 | |
| 176 #define D(n, tag, o, f) tag, | |
| 177 enum | |
| 178 { | |
| 179 DIRECTIVE_TABLE | |
| 180 N_DIRECTIVES | |
| 181 }; | |
| 182 #undef D | |
| 183 | |
| 184 #define D(name, t, origin, flags) \ | |
| 185 { do_##name, (const uchar *) #name, \ | |
| 186 sizeof #name - 1, origin, flags }, | |
| 187 static const directive dtable[] = | |
| 188 { | |
| 189 DIRECTIVE_TABLE | |
| 190 }; | |
| 191 #undef D | |
| 111 | 192 |
| 193 /* A NULL-terminated array of directive names for use | |
| 194 when suggesting corrections for misspelled directives. */ | |
| 195 #define D(name, t, origin, flags) #name, | |
| 196 static const char * const directive_names[] = { | |
| 197 DIRECTIVE_TABLE | |
| 198 NULL | |
| 199 }; | |
| 200 #undef D | |
| 201 | |
| 0 | 202 #undef DIRECTIVE_TABLE |
| 203 | |
| 204 /* Wrapper struct directive for linemarkers. | |
| 205 The origin is more or less true - the original K+R cpp | |
| 206 did use this notation in its preprocessed output. */ | |
| 207 static const directive linemarker_dir = | |
| 208 { | |
| 209 do_linemarker, UC"#", 1, KANDR, IN_I | |
| 210 }; | |
| 211 | |
| 212 #define SEEN_EOL() (pfile->cur_token[-1].type == CPP_EOF) | |
| 213 | |
| 214 /* Skip any remaining tokens in a directive. */ | |
| 215 static void | |
| 216 skip_rest_of_line (cpp_reader *pfile) | |
| 217 { | |
| 218 /* Discard all stacked contexts. */ | |
| 219 while (pfile->context->prev) | |
| 220 _cpp_pop_context (pfile); | |
| 221 | |
| 222 /* Sweep up all tokens remaining on the line. */ | |
| 223 if (! SEEN_EOL ()) | |
| 224 while (_cpp_lex_token (pfile)->type != CPP_EOF) | |
| 225 ; | |
| 226 } | |
| 227 | |
| 111 | 228 /* Helper function for check_oel. */ |
| 229 | |
| 0 | 230 static void |
| 131 | 231 check_eol_1 (cpp_reader *pfile, bool expand, enum cpp_warning_reason reason) |
| 0 | 232 { |
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233 if (! SEEN_EOL () && (expand |
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234 ? cpp_get_token (pfile) |
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235 : _cpp_lex_token (pfile))->type != CPP_EOF) |
| 111 | 236 cpp_pedwarning (pfile, reason, "extra tokens at end of #%s directive", |
| 237 pfile->directive->name); | |
| 238 } | |
| 239 | |
| 240 /* Variant of check_eol used for Wendif-labels warnings. */ | |
| 241 | |
| 242 static void | |
| 243 check_eol_endif_labels (cpp_reader *pfile) | |
| 244 { | |
| 245 check_eol_1 (pfile, false, CPP_W_ENDIF_LABELS); | |
| 246 } | |
| 247 | |
| 248 /* Ensure there are no stray tokens at the end of a directive. If | |
| 249 EXPAND is true, tokens macro-expanding to nothing are allowed. */ | |
| 250 | |
| 251 static void | |
| 252 check_eol (cpp_reader *pfile, bool expand) | |
| 253 { | |
| 254 check_eol_1 (pfile, expand, CPP_W_NONE); | |
| 0 | 255 } |
| 256 | |
| 257 /* Ensure there are no stray tokens other than comments at the end of | |
| 258 a directive, and gather the comments. */ | |
| 259 static const cpp_token ** | |
| 260 check_eol_return_comments (cpp_reader *pfile) | |
| 261 { | |
| 262 size_t c; | |
| 263 size_t capacity = 8; | |
| 264 const cpp_token **buf; | |
| 265 | |
| 266 buf = XNEWVEC (const cpp_token *, capacity); | |
| 267 c = 0; | |
| 268 if (! SEEN_EOL ()) | |
| 269 { | |
| 270 while (1) | |
| 271 { | |
| 272 const cpp_token *tok; | |
| 273 | |
| 274 tok = _cpp_lex_token (pfile); | |
| 275 if (tok->type == CPP_EOF) | |
| 276 break; | |
| 277 if (tok->type != CPP_COMMENT) | |
| 278 cpp_error (pfile, CPP_DL_PEDWARN, | |
| 279 "extra tokens at end of #%s directive", | |
| 280 pfile->directive->name); | |
| 281 else | |
| 282 { | |
| 283 if (c + 1 >= capacity) | |
| 284 { | |
| 285 capacity *= 2; | |
| 286 buf = XRESIZEVEC (const cpp_token *, buf, capacity); | |
| 287 } | |
| 288 buf[c] = tok; | |
| 289 ++c; | |
| 290 } | |
| 291 } | |
| 292 } | |
| 293 buf[c] = NULL; | |
| 294 return buf; | |
| 295 } | |
| 296 | |
| 297 /* Called when entering a directive, _Pragma or command-line directive. */ | |
| 298 static void | |
| 299 start_directive (cpp_reader *pfile) | |
| 300 { | |
| 301 /* Setup in-directive state. */ | |
| 302 pfile->state.in_directive = 1; | |
| 303 pfile->state.save_comments = 0; | |
| 304 pfile->directive_result.type = CPP_PADDING; | |
| 305 | |
| 306 /* Some handlers need the position of the # for diagnostics. */ | |
| 307 pfile->directive_line = pfile->line_table->highest_line; | |
| 308 } | |
| 309 | |
| 310 /* Called when leaving a directive, _Pragma or command-line directive. */ | |
| 311 static void | |
| 312 end_directive (cpp_reader *pfile, int skip_line) | |
| 313 { | |
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314 if (CPP_OPTION (pfile, traditional)) |
| 0 | 315 { |
| 316 /* Revert change of prepare_directive_trad. */ | |
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317 if (!pfile->state.in_deferred_pragma) |
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318 pfile->state.prevent_expansion--; |
| 0 | 319 |
| 320 if (pfile->directive != &dtable[T_DEFINE]) | |
| 321 _cpp_remove_overlay (pfile); | |
| 322 } | |
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323 else if (pfile->state.in_deferred_pragma) |
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324 ; |
| 0 | 325 /* We don't skip for an assembler #. */ |
| 326 else if (skip_line) | |
| 327 { | |
| 328 skip_rest_of_line (pfile); | |
| 329 if (!pfile->keep_tokens) | |
| 330 { | |
| 331 pfile->cur_run = &pfile->base_run; | |
| 332 pfile->cur_token = pfile->base_run.base; | |
| 333 } | |
| 334 } | |
| 335 | |
| 336 /* Restore state. */ | |
| 337 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
| 338 pfile->state.in_directive = 0; | |
| 339 pfile->state.in_expression = 0; | |
| 340 pfile->state.angled_headers = 0; | |
| 341 pfile->directive = 0; | |
| 342 } | |
| 343 | |
| 344 /* Prepare to handle the directive in pfile->directive. */ | |
| 345 static void | |
| 346 prepare_directive_trad (cpp_reader *pfile) | |
| 347 { | |
| 348 if (pfile->directive != &dtable[T_DEFINE]) | |
| 349 { | |
| 350 bool no_expand = (pfile->directive | |
| 351 && ! (pfile->directive->flags & EXPAND)); | |
| 352 bool was_skipping = pfile->state.skipping; | |
| 353 | |
| 354 pfile->state.in_expression = (pfile->directive == &dtable[T_IF] | |
| 355 || pfile->directive == &dtable[T_ELIF]); | |
| 356 if (pfile->state.in_expression) | |
| 357 pfile->state.skipping = false; | |
| 358 | |
| 359 if (no_expand) | |
| 360 pfile->state.prevent_expansion++; | |
| 111 | 361 _cpp_scan_out_logical_line (pfile, NULL, false); |
| 0 | 362 if (no_expand) |
| 363 pfile->state.prevent_expansion--; | |
| 364 | |
| 365 pfile->state.skipping = was_skipping; | |
| 366 _cpp_overlay_buffer (pfile, pfile->out.base, | |
| 367 pfile->out.cur - pfile->out.base); | |
| 368 } | |
| 369 | |
| 370 /* Stop ISO C from expanding anything. */ | |
| 371 pfile->state.prevent_expansion++; | |
| 372 } | |
| 373 | |
| 374 /* Output diagnostics for a directive DIR. INDENTED is nonzero if | |
| 375 the '#' was indented. */ | |
| 376 static void | |
| 377 directive_diagnostics (cpp_reader *pfile, const directive *dir, int indented) | |
| 378 { | |
| 379 /* Issue -pedantic or deprecated warnings for extensions. We let | |
| 380 -pedantic take precedence if both are applicable. */ | |
| 381 if (! pfile->state.skipping) | |
| 382 { | |
| 383 if (dir->origin == EXTENSION | |
| 384 && !(dir == &dtable[T_IMPORT] && CPP_OPTION (pfile, objc)) | |
| 385 && CPP_PEDANTIC (pfile)) | |
| 386 cpp_error (pfile, CPP_DL_PEDWARN, "#%s is a GCC extension", dir->name); | |
| 387 else if (((dir->flags & DEPRECATED) != 0 | |
| 388 || (dir == &dtable[T_IMPORT] && !CPP_OPTION (pfile, objc))) | |
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389 && CPP_OPTION (pfile, cpp_warn_deprecated)) |
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390 cpp_warning (pfile, CPP_W_DEPRECATED, |
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391 "#%s is a deprecated GCC extension", dir->name); |
| 0 | 392 } |
| 393 | |
| 394 /* Traditionally, a directive is ignored unless its # is in | |
| 395 column 1. Therefore in code intended to work with K+R | |
| 396 compilers, directives added by C89 must have their # | |
| 397 indented, and directives present in traditional C must not. | |
| 398 This is true even of directives in skipped conditional | |
| 399 blocks. #elif cannot be used at all. */ | |
| 400 if (CPP_WTRADITIONAL (pfile)) | |
| 401 { | |
| 402 if (dir == &dtable[T_ELIF]) | |
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403 cpp_warning (pfile, CPP_W_TRADITIONAL, |
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404 "suggest not using #elif in traditional C"); |
| 0 | 405 else if (indented && dir->origin == KANDR) |
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406 cpp_warning (pfile, CPP_W_TRADITIONAL, |
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407 "traditional C ignores #%s with the # indented", |
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408 dir->name); |
| 0 | 409 else if (!indented && dir->origin != KANDR) |
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410 cpp_warning (pfile, CPP_W_TRADITIONAL, |
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411 "suggest hiding #%s from traditional C with an indented #", |
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412 dir->name); |
| 0 | 413 } |
| 414 } | |
| 415 | |
| 416 /* Check if we have a known directive. INDENTED is nonzero if the | |
| 417 '#' of the directive was indented. This function is in this file | |
| 418 to save unnecessarily exporting dtable etc. to lex.c. Returns | |
| 419 nonzero if the line of tokens has been handled, zero if we should | |
| 420 continue processing the line. */ | |
| 421 int | |
| 422 _cpp_handle_directive (cpp_reader *pfile, int indented) | |
| 423 { | |
| 424 const directive *dir = 0; | |
| 425 const cpp_token *dname; | |
| 426 bool was_parsing_args = pfile->state.parsing_args; | |
| 427 bool was_discarding_output = pfile->state.discarding_output; | |
| 428 int skip = 1; | |
| 429 | |
| 430 if (was_discarding_output) | |
| 431 pfile->state.prevent_expansion = 0; | |
| 432 | |
| 433 if (was_parsing_args) | |
| 434 { | |
|
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435 if (CPP_OPTION (pfile, cpp_pedantic)) |
| 0 | 436 cpp_error (pfile, CPP_DL_PEDWARN, |
| 437 "embedding a directive within macro arguments is not portable"); | |
| 438 pfile->state.parsing_args = 0; | |
| 439 pfile->state.prevent_expansion = 0; | |
| 440 } | |
| 441 start_directive (pfile); | |
| 442 dname = _cpp_lex_token (pfile); | |
| 443 | |
| 444 if (dname->type == CPP_NAME) | |
| 445 { | |
|
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446 if (dname->val.node.node->is_directive) |
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447 dir = &dtable[dname->val.node.node->directive_index]; |
| 0 | 448 } |
| 449 /* We do not recognize the # followed by a number extension in | |
| 450 assembler code. */ | |
| 451 else if (dname->type == CPP_NUMBER && CPP_OPTION (pfile, lang) != CLK_ASM) | |
| 452 { | |
| 453 dir = &linemarker_dir; | |
| 454 if (CPP_PEDANTIC (pfile) && ! CPP_OPTION (pfile, preprocessed) | |
| 455 && ! pfile->state.skipping) | |
| 456 cpp_error (pfile, CPP_DL_PEDWARN, | |
| 457 "style of line directive is a GCC extension"); | |
| 458 } | |
| 459 | |
| 460 if (dir) | |
| 461 { | |
| 462 /* If we have a directive that is not an opening conditional, | |
| 463 invalidate any control macro. */ | |
| 464 if (! (dir->flags & IF_COND)) | |
| 465 pfile->mi_valid = false; | |
| 466 | |
| 467 /* Kluge alert. In order to be sure that code like this | |
| 468 | |
| 469 #define HASH # | |
| 470 HASH define foo bar | |
| 471 | |
| 472 does not cause '#define foo bar' to get executed when | |
| 473 compiled with -save-temps, we recognize directives in | |
| 474 -fpreprocessed mode only if the # is in column 1. macro.c | |
| 475 puts a space in front of any '#' at the start of a macro. | |
| 476 | |
| 477 We exclude the -fdirectives-only case because macro expansion | |
| 478 has not been performed yet, and block comments can cause spaces | |
| 111 | 479 to precede the directive. */ |
| 0 | 480 if (CPP_OPTION (pfile, preprocessed) |
| 481 && !CPP_OPTION (pfile, directives_only) | |
| 482 && (indented || !(dir->flags & IN_I))) | |
| 483 { | |
| 484 skip = 0; | |
| 485 dir = 0; | |
| 486 } | |
| 487 else | |
| 488 { | |
| 489 /* In failed conditional groups, all non-conditional | |
| 490 directives are ignored. Before doing that, whether | |
| 491 skipping or not, we should lex angle-bracketed headers | |
| 492 correctly, and maybe output some diagnostics. */ | |
| 493 pfile->state.angled_headers = dir->flags & INCL; | |
| 494 pfile->state.directive_wants_padding = dir->flags & INCL; | |
| 495 if (! CPP_OPTION (pfile, preprocessed)) | |
| 496 directive_diagnostics (pfile, dir, indented); | |
| 497 if (pfile->state.skipping && !(dir->flags & COND)) | |
| 498 dir = 0; | |
| 499 } | |
| 500 } | |
| 501 else if (dname->type == CPP_EOF) | |
| 502 ; /* CPP_EOF is the "null directive". */ | |
| 503 else | |
| 504 { | |
| 505 /* An unknown directive. Don't complain about it in assembly | |
| 506 source: we don't know where the comments are, and # may | |
| 507 introduce assembler pseudo-ops. Don't complain about invalid | |
| 508 directives in skipped conditional groups (6.10 p4). */ | |
| 509 if (CPP_OPTION (pfile, lang) == CLK_ASM) | |
| 510 skip = 0; | |
| 511 else if (!pfile->state.skipping) | |
| 111 | 512 { |
| 513 const char *unrecognized | |
| 514 = (const char *)cpp_token_as_text (pfile, dname); | |
| 515 const char *hint = NULL; | |
| 516 | |
| 517 /* Call back into gcc to get a spelling suggestion. Ideally | |
| 518 we'd just use best_match from gcc/spellcheck.h (and filter | |
| 519 out the uncommon directives), but that requires moving it | |
| 520 to a support library. */ | |
| 521 if (pfile->cb.get_suggestion) | |
| 522 hint = pfile->cb.get_suggestion (pfile, unrecognized, | |
| 523 directive_names); | |
| 524 | |
| 525 if (hint) | |
| 526 { | |
| 527 rich_location richloc (pfile->line_table, dname->src_loc); | |
| 528 source_range misspelled_token_range | |
| 529 = get_range_from_loc (pfile->line_table, dname->src_loc); | |
| 530 richloc.add_fixit_replace (misspelled_token_range, hint); | |
| 131 | 531 cpp_error_at (pfile, CPP_DL_ERROR, &richloc, |
| 532 "invalid preprocessing directive #%s;" | |
| 533 " did you mean #%s?", | |
| 534 unrecognized, hint); | |
| 111 | 535 } |
| 536 else | |
| 537 cpp_error (pfile, CPP_DL_ERROR, | |
| 538 "invalid preprocessing directive #%s", | |
| 539 unrecognized); | |
| 540 } | |
| 0 | 541 } |
| 542 | |
| 543 pfile->directive = dir; | |
| 544 if (CPP_OPTION (pfile, traditional)) | |
| 545 prepare_directive_trad (pfile); | |
| 546 | |
| 547 if (dir) | |
| 548 pfile->directive->handler (pfile); | |
| 549 else if (skip == 0) | |
| 550 _cpp_backup_tokens (pfile, 1); | |
| 551 | |
| 552 end_directive (pfile, skip); | |
| 553 if (was_parsing_args && !pfile->state.in_deferred_pragma) | |
| 554 { | |
| 555 /* Restore state when within macro args. */ | |
| 556 pfile->state.parsing_args = 2; | |
| 557 pfile->state.prevent_expansion = 1; | |
| 558 } | |
| 559 if (was_discarding_output) | |
| 560 pfile->state.prevent_expansion = 1; | |
| 561 return skip; | |
| 562 } | |
| 563 | |
| 564 /* Directive handler wrapper used by the command line option | |
| 565 processor. BUF is \n terminated. */ | |
| 566 static void | |
| 567 run_directive (cpp_reader *pfile, int dir_no, const char *buf, size_t count) | |
| 568 { | |
| 569 cpp_push_buffer (pfile, (const uchar *) buf, count, | |
| 570 /* from_stage3 */ true); | |
| 571 start_directive (pfile); | |
| 572 | |
| 573 /* This is a short-term fix to prevent a leading '#' being | |
| 574 interpreted as a directive. */ | |
| 575 _cpp_clean_line (pfile); | |
| 576 | |
| 577 pfile->directive = &dtable[dir_no]; | |
| 578 if (CPP_OPTION (pfile, traditional)) | |
| 579 prepare_directive_trad (pfile); | |
| 580 pfile->directive->handler (pfile); | |
| 581 end_directive (pfile, 1); | |
| 582 _cpp_pop_buffer (pfile); | |
| 583 } | |
| 584 | |
| 585 /* Checks for validity the macro name in #define, #undef, #ifdef and | |
| 586 #ifndef directives. IS_DEF_OR_UNDEF is true if this call is | |
| 587 processing a #define or #undefine directive, and false | |
| 588 otherwise. */ | |
| 589 static cpp_hashnode * | |
| 590 lex_macro_node (cpp_reader *pfile, bool is_def_or_undef) | |
| 591 { | |
| 592 const cpp_token *token = _cpp_lex_token (pfile); | |
| 593 | |
| 594 /* The token immediately after #define must be an identifier. That | |
| 595 identifier may not be "defined", per C99 6.10.8p4. | |
| 596 In C++, it may not be any of the "named operators" either, | |
| 597 per C++98 [lex.digraph], [lex.key]. | |
| 598 Finally, the identifier may not have been poisoned. (In that case | |
| 599 the lexer has issued the error message for us.) */ | |
| 600 | |
| 601 if (token->type == CPP_NAME) | |
| 602 { | |
|
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603 cpp_hashnode *node = token->val.node.node; |
| 0 | 604 |
| 605 if (is_def_or_undef && node == pfile->spec_nodes.n_defined) | |
| 606 cpp_error (pfile, CPP_DL_ERROR, | |
| 607 "\"defined\" cannot be used as a macro name"); | |
| 111 | 608 else if (is_def_or_undef |
| 609 && (node == pfile->spec_nodes.n__has_include__ | |
| 610 || node == pfile->spec_nodes.n__has_include_next__)) | |
| 611 cpp_error (pfile, CPP_DL_ERROR, | |
| 612 "\"__has_include__\" cannot be used as a macro name"); | |
| 0 | 613 else if (! (node->flags & NODE_POISONED)) |
| 614 return node; | |
| 615 } | |
| 616 else if (token->flags & NAMED_OP) | |
| 617 cpp_error (pfile, CPP_DL_ERROR, | |
| 618 "\"%s\" cannot be used as a macro name as it is an operator in C++", | |
|
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619 NODE_NAME (token->val.node.node)); |
| 0 | 620 else if (token->type == CPP_EOF) |
| 621 cpp_error (pfile, CPP_DL_ERROR, "no macro name given in #%s directive", | |
| 622 pfile->directive->name); | |
| 623 else | |
| 624 cpp_error (pfile, CPP_DL_ERROR, "macro names must be identifiers"); | |
| 625 | |
| 626 return NULL; | |
| 627 } | |
| 628 | |
| 629 /* Process a #define directive. Most work is done in macro.c. */ | |
| 630 static void | |
| 631 do_define (cpp_reader *pfile) | |
| 632 { | |
| 633 cpp_hashnode *node = lex_macro_node (pfile, true); | |
| 634 | |
| 635 if (node) | |
| 636 { | |
| 637 /* If we have been requested to expand comments into macros, | |
| 638 then re-enable saving of comments. */ | |
| 639 pfile->state.save_comments = | |
| 640 ! CPP_OPTION (pfile, discard_comments_in_macro_exp); | |
| 641 | |
| 642 if (pfile->cb.before_define) | |
| 643 pfile->cb.before_define (pfile); | |
| 644 | |
| 645 if (_cpp_create_definition (pfile, node)) | |
| 646 if (pfile->cb.define) | |
| 647 pfile->cb.define (pfile, pfile->directive_line, node); | |
| 648 | |
| 649 node->flags &= ~NODE_USED; | |
| 650 } | |
| 651 } | |
| 652 | |
| 653 /* Handle #undef. Mark the identifier NT_VOID in the hash table. */ | |
| 654 static void | |
| 655 do_undef (cpp_reader *pfile) | |
| 656 { | |
| 657 cpp_hashnode *node = lex_macro_node (pfile, true); | |
| 658 | |
| 659 if (node) | |
| 660 { | |
| 661 if (pfile->cb.before_define) | |
| 662 pfile->cb.before_define (pfile); | |
| 663 | |
| 664 if (pfile->cb.undef) | |
| 665 pfile->cb.undef (pfile, pfile->directive_line, node); | |
| 666 | |
| 667 /* 6.10.3.5 paragraph 2: [#undef] is ignored if the specified | |
| 668 identifier is not currently defined as a macro name. */ | |
| 131 | 669 if (cpp_macro_p (node)) |
| 0 | 670 { |
| 671 if (node->flags & NODE_WARN) | |
| 672 cpp_error (pfile, CPP_DL_WARNING, | |
| 673 "undefining \"%s\"", NODE_NAME (node)); | |
| 131 | 674 else if (cpp_builtin_macro_p (node) |
| 111 | 675 && CPP_OPTION (pfile, warn_builtin_macro_redefined)) |
| 676 cpp_warning_with_line (pfile, CPP_W_BUILTIN_MACRO_REDEFINED, | |
| 677 pfile->directive_line, 0, | |
| 678 "undefining \"%s\"", NODE_NAME (node)); | |
| 0 | 679 |
| 680 if (CPP_OPTION (pfile, warn_unused_macros)) | |
| 681 _cpp_warn_if_unused_macro (pfile, node, NULL); | |
| 682 | |
| 683 _cpp_free_definition (node); | |
| 684 } | |
| 685 } | |
| 686 | |
|
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687 check_eol (pfile, false); |
| 0 | 688 } |
| 689 | |
| 690 /* Undefine a single macro/assertion/whatever. */ | |
| 691 | |
| 692 static int | |
| 693 undefine_macros (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *h, | |
| 694 void *data_p ATTRIBUTE_UNUSED) | |
| 695 { | |
| 696 /* Body of _cpp_free_definition inlined here for speed. | |
| 697 Macros and assertions no longer have anything to free. */ | |
| 698 h->type = NT_VOID; | |
| 131 | 699 h->value.answers = NULL; |
| 700 h->flags &= ~(NODE_POISONED|NODE_DISABLED|NODE_USED); | |
| 0 | 701 return 1; |
| 702 } | |
| 703 | |
| 704 /* Undefine all macros and assertions. */ | |
| 705 | |
| 706 void | |
| 707 cpp_undef_all (cpp_reader *pfile) | |
| 708 { | |
| 709 cpp_forall_identifiers (pfile, undefine_macros, NULL); | |
| 710 } | |
| 711 | |
| 712 | |
| 713 /* Helper routine used by parse_include. Reinterpret the current line | |
| 714 as an h-char-sequence (< ... >); we are looking at the first token | |
| 715 after the <. Returns a malloced filename. */ | |
| 716 static char * | |
| 717 glue_header_name (cpp_reader *pfile) | |
| 718 { | |
| 719 const cpp_token *token; | |
| 720 char *buffer; | |
| 721 size_t len, total_len = 0, capacity = 1024; | |
| 722 | |
| 723 /* To avoid lexed tokens overwriting our glued name, we can only | |
| 724 allocate from the string pool once we've lexed everything. */ | |
| 725 buffer = XNEWVEC (char, capacity); | |
| 726 for (;;) | |
| 727 { | |
| 728 token = get_token_no_padding (pfile); | |
| 729 | |
| 730 if (token->type == CPP_GREATER) | |
| 731 break; | |
| 732 if (token->type == CPP_EOF) | |
| 733 { | |
| 734 cpp_error (pfile, CPP_DL_ERROR, "missing terminating > character"); | |
| 735 break; | |
| 736 } | |
| 737 | |
| 738 len = cpp_token_len (token) + 2; /* Leading space, terminating \0. */ | |
| 739 if (total_len + len > capacity) | |
| 740 { | |
| 741 capacity = (capacity + len) * 2; | |
| 742 buffer = XRESIZEVEC (char, buffer, capacity); | |
| 743 } | |
| 744 | |
| 745 if (token->flags & PREV_WHITE) | |
| 746 buffer[total_len++] = ' '; | |
| 747 | |
| 748 total_len = (cpp_spell_token (pfile, token, (uchar *) &buffer[total_len], | |
| 749 true) | |
| 750 - (uchar *) buffer); | |
| 751 } | |
| 752 | |
| 753 buffer[total_len] = '\0'; | |
| 754 return buffer; | |
| 755 } | |
| 756 | |
| 757 /* Returns the file name of #include, #include_next, #import and | |
| 758 #pragma dependency. The string is malloced and the caller should | |
|
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759 free it. Returns NULL on error. LOCATION is the source location |
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760 of the file name. */ |
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761 |
| 0 | 762 static const char * |
| 763 parse_include (cpp_reader *pfile, int *pangle_brackets, | |
|
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764 const cpp_token ***buf, source_location *location) |
| 0 | 765 { |
| 766 char *fname; | |
| 767 const cpp_token *header; | |
| 768 | |
| 769 /* Allow macro expansion. */ | |
| 770 header = get_token_no_padding (pfile); | |
|
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771 *location = header->src_loc; |
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772 if ((header->type == CPP_STRING && header->val.str.text[0] != 'R') |
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773 || header->type == CPP_HEADER_NAME) |
| 0 | 774 { |
| 775 fname = XNEWVEC (char, header->val.str.len - 1); | |
| 776 memcpy (fname, header->val.str.text + 1, header->val.str.len - 2); | |
| 777 fname[header->val.str.len - 2] = '\0'; | |
| 778 *pangle_brackets = header->type == CPP_HEADER_NAME; | |
| 779 } | |
| 780 else if (header->type == CPP_LESS) | |
| 781 { | |
| 782 fname = glue_header_name (pfile); | |
| 783 *pangle_brackets = 1; | |
| 784 } | |
| 785 else | |
| 786 { | |
| 787 const unsigned char *dir; | |
| 788 | |
| 789 if (pfile->directive == &dtable[T_PRAGMA]) | |
| 790 dir = UC"pragma dependency"; | |
| 791 else | |
| 792 dir = pfile->directive->name; | |
| 793 cpp_error (pfile, CPP_DL_ERROR, "#%s expects \"FILENAME\" or <FILENAME>", | |
| 794 dir); | |
| 795 | |
| 796 return NULL; | |
| 797 } | |
| 798 | |
| 799 if (pfile->directive == &dtable[T_PRAGMA]) | |
| 800 { | |
| 801 /* This pragma allows extra tokens after the file name. */ | |
| 802 } | |
| 803 else if (buf == NULL || CPP_OPTION (pfile, discard_comments)) | |
|
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804 check_eol (pfile, true); |
| 0 | 805 else |
| 806 { | |
| 807 /* If we are not discarding comments, then gather them while | |
| 808 doing the eol check. */ | |
| 809 *buf = check_eol_return_comments (pfile); | |
| 810 } | |
| 811 | |
| 812 return fname; | |
| 813 } | |
| 814 | |
| 815 /* Handle #include, #include_next and #import. */ | |
| 816 static void | |
| 817 do_include_common (cpp_reader *pfile, enum include_type type) | |
| 818 { | |
| 819 const char *fname; | |
| 820 int angle_brackets; | |
| 821 const cpp_token **buf = NULL; | |
|
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822 source_location location; |
| 0 | 823 |
| 824 /* Re-enable saving of comments if requested, so that the include | |
| 825 callback can dump comments which follow #include. */ | |
| 826 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
| 827 | |
|
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828 fname = parse_include (pfile, &angle_brackets, &buf, &location); |
| 0 | 829 if (!fname) |
| 830 { | |
| 831 if (buf) | |
| 832 XDELETEVEC (buf); | |
| 833 return; | |
| 834 } | |
| 835 | |
| 836 if (!*fname) | |
| 837 { | |
|
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838 cpp_error_with_line (pfile, CPP_DL_ERROR, location, 0, |
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839 "empty filename in #%s", |
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840 pfile->directive->name); |
| 0 | 841 XDELETEVEC (fname); |
| 842 if (buf) | |
| 843 XDELETEVEC (buf); | |
| 844 return; | |
| 845 } | |
| 846 | |
| 847 /* Prevent #include recursion. */ | |
| 848 if (pfile->line_table->depth >= CPP_STACK_MAX) | |
| 849 cpp_error (pfile, CPP_DL_ERROR, "#include nested too deeply"); | |
| 850 else | |
| 851 { | |
| 852 /* Get out of macro context, if we are. */ | |
| 853 skip_rest_of_line (pfile); | |
| 854 | |
| 855 if (pfile->cb.include) | |
| 856 pfile->cb.include (pfile, pfile->directive_line, | |
| 857 pfile->directive->name, fname, angle_brackets, | |
| 858 buf); | |
| 859 | |
| 111 | 860 _cpp_stack_include (pfile, fname, angle_brackets, type, location); |
| 0 | 861 } |
| 862 | |
| 863 XDELETEVEC (fname); | |
| 864 if (buf) | |
| 865 XDELETEVEC (buf); | |
| 866 } | |
| 867 | |
| 868 static void | |
| 869 do_include (cpp_reader *pfile) | |
| 870 { | |
| 871 do_include_common (pfile, IT_INCLUDE); | |
| 872 } | |
| 873 | |
| 874 static void | |
| 875 do_import (cpp_reader *pfile) | |
| 876 { | |
| 877 do_include_common (pfile, IT_IMPORT); | |
| 878 } | |
| 879 | |
| 880 static void | |
| 881 do_include_next (cpp_reader *pfile) | |
| 882 { | |
| 883 enum include_type type = IT_INCLUDE_NEXT; | |
| 884 | |
| 885 /* If this is the primary source file, warn and use the normal | |
| 886 search logic. */ | |
| 887 if (cpp_in_primary_file (pfile)) | |
| 888 { | |
| 889 cpp_error (pfile, CPP_DL_WARNING, | |
| 890 "#include_next in primary source file"); | |
| 891 type = IT_INCLUDE; | |
| 892 } | |
| 893 do_include_common (pfile, type); | |
| 894 } | |
| 895 | |
| 896 /* Subroutine of do_linemarker. Read possible flags after file name. | |
| 897 LAST is the last flag seen; 0 if this is the first flag. Return the | |
| 898 flag if it is valid, 0 at the end of the directive. Otherwise | |
| 899 complain. */ | |
| 900 static unsigned int | |
| 901 read_flag (cpp_reader *pfile, unsigned int last) | |
| 902 { | |
| 903 const cpp_token *token = _cpp_lex_token (pfile); | |
| 904 | |
| 905 if (token->type == CPP_NUMBER && token->val.str.len == 1) | |
| 906 { | |
| 907 unsigned int flag = token->val.str.text[0] - '0'; | |
| 908 | |
| 909 if (flag > last && flag <= 4 | |
| 910 && (flag != 4 || last == 3) | |
| 911 && (flag != 2 || last == 0)) | |
| 912 return flag; | |
| 913 } | |
| 914 | |
| 915 if (token->type != CPP_EOF) | |
| 916 cpp_error (pfile, CPP_DL_ERROR, "invalid flag \"%s\" in line directive", | |
| 917 cpp_token_as_text (pfile, token)); | |
| 918 return 0; | |
| 919 } | |
| 920 | |
| 921 /* Subroutine of do_line and do_linemarker. Convert a number in STR, | |
| 922 of length LEN, to binary; store it in NUMP, and return false if the | |
| 923 number was well-formed, true if not. WRAPPED is set to true if the | |
| 924 number did not fit into 'unsigned long'. */ | |
| 925 static bool | |
| 926 strtolinenum (const uchar *str, size_t len, linenum_type *nump, bool *wrapped) | |
| 927 { | |
| 928 linenum_type reg = 0; | |
| 929 linenum_type reg_prev = 0; | |
| 930 | |
| 931 uchar c; | |
| 932 *wrapped = false; | |
| 933 while (len--) | |
| 934 { | |
| 935 c = *str++; | |
| 936 if (!ISDIGIT (c)) | |
| 937 return true; | |
| 938 reg *= 10; | |
| 939 reg += c - '0'; | |
| 940 if (reg < reg_prev) | |
| 941 *wrapped = true; | |
| 942 reg_prev = reg; | |
| 943 } | |
| 944 *nump = reg; | |
| 945 return false; | |
| 946 } | |
| 947 | |
| 948 /* Interpret #line command. | |
| 949 Note that the filename string (if any) is a true string constant | |
| 950 (escapes are interpreted), unlike in #line. */ | |
| 951 static void | |
| 952 do_line (cpp_reader *pfile) | |
| 953 { | |
| 111 | 954 struct line_maps *line_table = pfile->line_table; |
| 955 const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table); | |
| 0 | 956 |
| 957 /* skip_rest_of_line() may cause line table to be realloc()ed so note down | |
| 958 sysp right now. */ | |
| 959 | |
| 111 | 960 unsigned char map_sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (map); |
| 0 | 961 const cpp_token *token; |
| 111 | 962 const char *new_file = ORDINARY_MAP_FILE_NAME (map); |
| 0 | 963 linenum_type new_lineno; |
| 964 | |
| 965 /* C99 raised the minimum limit on #line numbers. */ | |
| 966 linenum_type cap = CPP_OPTION (pfile, c99) ? 2147483647 : 32767; | |
| 967 bool wrapped; | |
| 968 | |
| 969 /* #line commands expand macros. */ | |
| 970 token = cpp_get_token (pfile); | |
| 971 if (token->type != CPP_NUMBER | |
| 972 || strtolinenum (token->val.str.text, token->val.str.len, | |
| 973 &new_lineno, &wrapped)) | |
| 974 { | |
| 975 if (token->type == CPP_EOF) | |
| 976 cpp_error (pfile, CPP_DL_ERROR, "unexpected end of file after #line"); | |
| 977 else | |
| 978 cpp_error (pfile, CPP_DL_ERROR, | |
| 979 "\"%s\" after #line is not a positive integer", | |
| 980 cpp_token_as_text (pfile, token)); | |
| 981 return; | |
| 982 } | |
| 983 | |
| 984 if (CPP_PEDANTIC (pfile) && (new_lineno == 0 || new_lineno > cap || wrapped)) | |
| 985 cpp_error (pfile, CPP_DL_PEDWARN, "line number out of range"); | |
| 986 else if (wrapped) | |
| 987 cpp_error (pfile, CPP_DL_WARNING, "line number out of range"); | |
| 988 | |
| 989 token = cpp_get_token (pfile); | |
| 990 if (token->type == CPP_STRING) | |
| 991 { | |
| 992 cpp_string s = { 0, 0 }; | |
| 993 if (cpp_interpret_string_notranslate (pfile, &token->val.str, 1, | |
|
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994 &s, CPP_STRING)) |
| 0 | 995 new_file = (const char *)s.text; |
|
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996 check_eol (pfile, true); |
| 0 | 997 } |
| 998 else if (token->type != CPP_EOF) | |
| 999 { | |
| 1000 cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", | |
| 1001 cpp_token_as_text (pfile, token)); | |
| 1002 return; | |
| 1003 } | |
| 1004 | |
| 1005 skip_rest_of_line (pfile); | |
|
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1006 _cpp_do_file_change (pfile, LC_RENAME_VERBATIM, new_file, new_lineno, |
| 0 | 1007 map_sysp); |
| 111 | 1008 line_table->seen_line_directive = true; |
| 0 | 1009 } |
| 1010 | |
| 1011 /* Interpret the # 44 "file" [flags] notation, which has slightly | |
| 1012 different syntax and semantics from #line: Flags are allowed, | |
| 1013 and we never complain about the line number being too big. */ | |
| 1014 static void | |
| 1015 do_linemarker (cpp_reader *pfile) | |
| 1016 { | |
| 111 | 1017 struct line_maps *line_table = pfile->line_table; |
| 1018 const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table); | |
| 0 | 1019 const cpp_token *token; |
| 111 | 1020 const char *new_file = ORDINARY_MAP_FILE_NAME (map); |
| 0 | 1021 linenum_type new_lineno; |
| 111 | 1022 unsigned int new_sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (map); |
|
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1023 enum lc_reason reason = LC_RENAME_VERBATIM; |
| 0 | 1024 int flag; |
| 1025 bool wrapped; | |
| 1026 | |
| 1027 /* Back up so we can get the number again. Putting this in | |
| 1028 _cpp_handle_directive risks two calls to _cpp_backup_tokens in | |
| 1029 some circumstances, which can segfault. */ | |
| 1030 _cpp_backup_tokens (pfile, 1); | |
| 1031 | |
| 1032 /* #line commands expand macros. */ | |
| 1033 token = cpp_get_token (pfile); | |
| 1034 if (token->type != CPP_NUMBER | |
| 1035 || strtolinenum (token->val.str.text, token->val.str.len, | |
| 1036 &new_lineno, &wrapped)) | |
| 1037 { | |
| 1038 /* Unlike #line, there does not seem to be a way to get an EOF | |
| 1039 here. So, it should be safe to always spell the token. */ | |
| 1040 cpp_error (pfile, CPP_DL_ERROR, | |
| 1041 "\"%s\" after # is not a positive integer", | |
| 1042 cpp_token_as_text (pfile, token)); | |
| 1043 return; | |
| 1044 } | |
| 1045 | |
| 1046 token = cpp_get_token (pfile); | |
| 1047 if (token->type == CPP_STRING) | |
| 1048 { | |
| 1049 cpp_string s = { 0, 0 }; | |
| 1050 if (cpp_interpret_string_notranslate (pfile, &token->val.str, | |
|
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1051 1, &s, CPP_STRING)) |
| 0 | 1052 new_file = (const char *)s.text; |
| 1053 | |
| 1054 new_sysp = 0; | |
| 1055 flag = read_flag (pfile, 0); | |
| 1056 if (flag == 1) | |
| 1057 { | |
| 1058 reason = LC_ENTER; | |
| 1059 /* Fake an include for cpp_included (). */ | |
| 1060 _cpp_fake_include (pfile, new_file); | |
| 1061 flag = read_flag (pfile, flag); | |
| 1062 } | |
| 1063 else if (flag == 2) | |
| 1064 { | |
| 1065 reason = LC_LEAVE; | |
| 1066 flag = read_flag (pfile, flag); | |
| 1067 } | |
| 1068 if (flag == 3) | |
| 1069 { | |
| 1070 new_sysp = 1; | |
| 1071 flag = read_flag (pfile, flag); | |
| 1072 if (flag == 4) | |
| 1073 new_sysp = 2; | |
| 1074 } | |
| 1075 pfile->buffer->sysp = new_sysp; | |
| 1076 | |
|
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1077 check_eol (pfile, false); |
| 0 | 1078 } |
| 1079 else if (token->type != CPP_EOF) | |
| 1080 { | |
| 1081 cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", | |
| 1082 cpp_token_as_text (pfile, token)); | |
| 1083 return; | |
| 1084 } | |
| 1085 | |
| 1086 skip_rest_of_line (pfile); | |
|
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1087 |
| 111 | 1088 if (reason == LC_LEAVE) |
| 1089 { | |
| 1090 /* Reread map since cpp_get_token can invalidate it with a | |
| 1091 reallocation. */ | |
| 1092 map = LINEMAPS_LAST_ORDINARY_MAP (line_table); | |
| 131 | 1093 const line_map_ordinary *from |
| 1094 = linemap_included_from_linemap (line_table, map); | |
| 111 | 1095 if (MAIN_FILE_P (map) |
| 131 | 1096 || (from |
| 111 | 1097 && filename_cmp (ORDINARY_MAP_FILE_NAME (from), new_file) != 0)) |
| 1098 { | |
| 1099 cpp_warning (pfile, CPP_W_NONE, | |
| 1100 "file \"%s\" linemarker ignored due to " | |
| 1101 "incorrect nesting", new_file); | |
| 1102 return; | |
| 1103 } | |
| 1104 } | |
|
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1105 /* Compensate for the increment in linemap_add that occurs in |
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1106 _cpp_do_file_change. We're currently at the start of the line |
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1107 *following* the #line directive. A separate source_location for this |
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1108 location makes no sense (until we do the LC_LEAVE), and |
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1109 complicates LAST_SOURCE_LINE_LOCATION. */ |
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1110 pfile->line_table->highest_location--; |
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1111 |
| 0 | 1112 _cpp_do_file_change (pfile, reason, new_file, new_lineno, new_sysp); |
| 111 | 1113 line_table->seen_line_directive = true; |
| 0 | 1114 } |
| 1115 | |
| 1116 /* Arrange the file_change callback. pfile->line has changed to | |
| 1117 FILE_LINE of TO_FILE, for reason REASON. SYSP is 1 for a system | |
| 1118 header, 2 for a system header that needs to be extern "C" protected, | |
| 1119 and zero otherwise. */ | |
| 1120 void | |
| 1121 _cpp_do_file_change (cpp_reader *pfile, enum lc_reason reason, | |
| 1122 const char *to_file, linenum_type file_line, | |
| 1123 unsigned int sysp) | |
| 1124 { | |
| 111 | 1125 linemap_assert (reason != LC_ENTER_MACRO); |
| 0 | 1126 const struct line_map *map = linemap_add (pfile->line_table, reason, sysp, |
| 1127 to_file, file_line); | |
| 111 | 1128 const line_map_ordinary *ord_map = NULL; |
| 0 | 1129 if (map != NULL) |
| 111 | 1130 { |
| 1131 ord_map = linemap_check_ordinary (map); | |
| 1132 linemap_line_start (pfile->line_table, | |
| 1133 ORDINARY_MAP_STARTING_LINE_NUMBER (ord_map), | |
| 1134 127); | |
| 1135 } | |
| 0 | 1136 |
| 1137 if (pfile->cb.file_change) | |
| 111 | 1138 pfile->cb.file_change (pfile, ord_map); |
| 0 | 1139 } |
| 1140 | |
| 1141 /* Report a warning or error detected by the program we are | |
| 1142 processing. Use the directive's tokens in the error message. */ | |
| 1143 static void | |
| 131 | 1144 do_diagnostic (cpp_reader *pfile, enum cpp_diagnostic_level code, |
| 1145 enum cpp_warning_reason reason, int print_dir) | |
| 0 | 1146 { |
| 1147 const unsigned char *dir_name; | |
| 1148 unsigned char *line; | |
| 1149 source_location src_loc = pfile->cur_token[-1].src_loc; | |
| 1150 | |
| 1151 if (print_dir) | |
| 1152 dir_name = pfile->directive->name; | |
| 1153 else | |
| 1154 dir_name = NULL; | |
| 1155 pfile->state.prevent_expansion++; | |
| 1156 line = cpp_output_line_to_string (pfile, dir_name); | |
| 1157 pfile->state.prevent_expansion--; | |
| 1158 | |
|
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1159 if (code == CPP_DL_WARNING_SYSHDR && reason) |
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1160 cpp_warning_with_line_syshdr (pfile, reason, src_loc, 0, "%s", line); |
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1161 else if (code == CPP_DL_WARNING && reason) |
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1162 cpp_warning_with_line (pfile, reason, src_loc, 0, "%s", line); |
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1163 else |
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1164 cpp_error_with_line (pfile, code, src_loc, 0, "%s", line); |
| 0 | 1165 free (line); |
| 1166 } | |
| 1167 | |
| 1168 static void | |
| 1169 do_error (cpp_reader *pfile) | |
| 1170 { | |
| 131 | 1171 do_diagnostic (pfile, CPP_DL_ERROR, CPP_W_NONE, 1); |
| 0 | 1172 } |
| 1173 | |
| 1174 static void | |
| 1175 do_warning (cpp_reader *pfile) | |
| 1176 { | |
| 1177 /* We want #warning diagnostics to be emitted in system headers too. */ | |
|
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1178 do_diagnostic (pfile, CPP_DL_WARNING_SYSHDR, CPP_W_WARNING_DIRECTIVE, 1); |
| 0 | 1179 } |
| 1180 | |
| 1181 /* Report program identification. */ | |
| 1182 static void | |
| 1183 do_ident (cpp_reader *pfile) | |
| 1184 { | |
| 1185 const cpp_token *str = cpp_get_token (pfile); | |
| 1186 | |
| 1187 if (str->type != CPP_STRING) | |
| 1188 cpp_error (pfile, CPP_DL_ERROR, "invalid #%s directive", | |
| 1189 pfile->directive->name); | |
| 1190 else if (pfile->cb.ident) | |
| 1191 pfile->cb.ident (pfile, pfile->directive_line, &str->val.str); | |
| 1192 | |
|
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1193 check_eol (pfile, false); |
| 0 | 1194 } |
| 1195 | |
| 1196 /* Lookup a PRAGMA name in a singly-linked CHAIN. Returns the | |
| 1197 matching entry, or NULL if none is found. The returned entry could | |
| 1198 be the start of a namespace chain, or a pragma. */ | |
| 1199 static struct pragma_entry * | |
| 1200 lookup_pragma_entry (struct pragma_entry *chain, const cpp_hashnode *pragma) | |
| 1201 { | |
| 1202 while (chain && chain->pragma != pragma) | |
| 1203 chain = chain->next; | |
| 1204 | |
| 1205 return chain; | |
| 1206 } | |
| 1207 | |
| 1208 /* Create and insert a blank pragma entry at the beginning of a | |
| 1209 singly-linked CHAIN. */ | |
| 1210 static struct pragma_entry * | |
| 1211 new_pragma_entry (cpp_reader *pfile, struct pragma_entry **chain) | |
| 1212 { | |
| 1213 struct pragma_entry *new_entry; | |
| 1214 | |
| 1215 new_entry = (struct pragma_entry *) | |
| 1216 _cpp_aligned_alloc (pfile, sizeof (struct pragma_entry)); | |
| 1217 | |
| 1218 memset (new_entry, 0, sizeof (struct pragma_entry)); | |
| 1219 new_entry->next = *chain; | |
| 1220 | |
| 1221 *chain = new_entry; | |
| 1222 return new_entry; | |
| 1223 } | |
| 1224 | |
| 1225 /* Register a pragma NAME in namespace SPACE. If SPACE is null, it | |
| 1226 goes in the global namespace. */ | |
| 1227 static struct pragma_entry * | |
| 1228 register_pragma_1 (cpp_reader *pfile, const char *space, const char *name, | |
| 1229 bool allow_name_expansion) | |
| 1230 { | |
| 1231 struct pragma_entry **chain = &pfile->pragmas; | |
| 1232 struct pragma_entry *entry; | |
| 1233 const cpp_hashnode *node; | |
| 1234 | |
| 1235 if (space) | |
| 1236 { | |
| 1237 node = cpp_lookup (pfile, UC space, strlen (space)); | |
| 1238 entry = lookup_pragma_entry (*chain, node); | |
| 1239 if (!entry) | |
| 1240 { | |
| 1241 entry = new_pragma_entry (pfile, chain); | |
| 1242 entry->pragma = node; | |
| 1243 entry->is_nspace = true; | |
| 1244 entry->allow_expansion = allow_name_expansion; | |
| 1245 } | |
| 1246 else if (!entry->is_nspace) | |
| 1247 goto clash; | |
| 1248 else if (entry->allow_expansion != allow_name_expansion) | |
| 1249 { | |
| 1250 cpp_error (pfile, CPP_DL_ICE, | |
| 1251 "registering pragmas in namespace \"%s\" with mismatched " | |
| 1252 "name expansion", space); | |
| 1253 return NULL; | |
| 1254 } | |
| 1255 chain = &entry->u.space; | |
| 1256 } | |
| 1257 else if (allow_name_expansion) | |
| 1258 { | |
| 1259 cpp_error (pfile, CPP_DL_ICE, | |
| 1260 "registering pragma \"%s\" with name expansion " | |
| 1261 "and no namespace", name); | |
| 1262 return NULL; | |
| 1263 } | |
| 1264 | |
| 1265 /* Check for duplicates. */ | |
| 1266 node = cpp_lookup (pfile, UC name, strlen (name)); | |
| 1267 entry = lookup_pragma_entry (*chain, node); | |
| 1268 if (entry == NULL) | |
| 1269 { | |
| 1270 entry = new_pragma_entry (pfile, chain); | |
| 1271 entry->pragma = node; | |
| 1272 return entry; | |
| 1273 } | |
| 1274 | |
| 1275 if (entry->is_nspace) | |
| 1276 clash: | |
| 1277 cpp_error (pfile, CPP_DL_ICE, | |
| 1278 "registering \"%s\" as both a pragma and a pragma namespace", | |
| 1279 NODE_NAME (node)); | |
| 1280 else if (space) | |
| 1281 cpp_error (pfile, CPP_DL_ICE, "#pragma %s %s is already registered", | |
| 1282 space, name); | |
| 1283 else | |
| 1284 cpp_error (pfile, CPP_DL_ICE, "#pragma %s is already registered", name); | |
| 1285 | |
| 1286 return NULL; | |
| 1287 } | |
| 1288 | |
| 1289 /* Register a cpplib internal pragma SPACE NAME with HANDLER. */ | |
| 1290 static void | |
| 1291 register_pragma_internal (cpp_reader *pfile, const char *space, | |
| 1292 const char *name, pragma_cb handler) | |
| 1293 { | |
| 1294 struct pragma_entry *entry; | |
| 1295 | |
| 1296 entry = register_pragma_1 (pfile, space, name, false); | |
| 1297 entry->is_internal = true; | |
| 1298 entry->u.handler = handler; | |
| 1299 } | |
| 1300 | |
| 1301 /* Register a pragma NAME in namespace SPACE. If SPACE is null, it | |
| 1302 goes in the global namespace. HANDLER is the handler it will call, | |
| 1303 which must be non-NULL. If ALLOW_EXPANSION is set, allow macro | |
| 1304 expansion while parsing pragma NAME. This function is exported | |
| 1305 from libcpp. */ | |
| 1306 void | |
| 1307 cpp_register_pragma (cpp_reader *pfile, const char *space, const char *name, | |
| 1308 pragma_cb handler, bool allow_expansion) | |
| 1309 { | |
| 1310 struct pragma_entry *entry; | |
| 1311 | |
| 1312 if (!handler) | |
| 1313 { | |
| 1314 cpp_error (pfile, CPP_DL_ICE, "registering pragma with NULL handler"); | |
| 1315 return; | |
| 1316 } | |
| 1317 | |
| 1318 entry = register_pragma_1 (pfile, space, name, false); | |
| 1319 if (entry) | |
| 1320 { | |
| 1321 entry->allow_expansion = allow_expansion; | |
| 1322 entry->u.handler = handler; | |
| 1323 } | |
| 1324 } | |
| 1325 | |
| 1326 /* Similarly, but create mark the pragma for deferred processing. | |
| 1327 When found, a CPP_PRAGMA token will be insertted into the stream | |
| 1328 with IDENT in the token->u.pragma slot. */ | |
| 1329 void | |
| 1330 cpp_register_deferred_pragma (cpp_reader *pfile, const char *space, | |
| 1331 const char *name, unsigned int ident, | |
| 1332 bool allow_expansion, bool allow_name_expansion) | |
| 1333 { | |
| 1334 struct pragma_entry *entry; | |
| 1335 | |
| 1336 entry = register_pragma_1 (pfile, space, name, allow_name_expansion); | |
| 1337 if (entry) | |
| 1338 { | |
| 1339 entry->is_deferred = true; | |
| 1340 entry->allow_expansion = allow_expansion; | |
| 1341 entry->u.ident = ident; | |
| 1342 } | |
| 1343 } | |
| 1344 | |
| 1345 /* Register the pragmas the preprocessor itself handles. */ | |
| 1346 void | |
| 1347 _cpp_init_internal_pragmas (cpp_reader *pfile) | |
| 1348 { | |
| 1349 /* Pragmas in the global namespace. */ | |
| 1350 register_pragma_internal (pfile, 0, "once", do_pragma_once); | |
|
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diff
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|
1351 register_pragma_internal (pfile, 0, "push_macro", do_pragma_push_macro); |
|
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0
diff
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|
1352 register_pragma_internal (pfile, 0, "pop_macro", do_pragma_pop_macro); |
| 0 | 1353 |
| 1354 /* New GCC-specific pragmas should be put in the GCC namespace. */ | |
| 1355 register_pragma_internal (pfile, "GCC", "poison", do_pragma_poison); | |
| 1356 register_pragma_internal (pfile, "GCC", "system_header", | |
| 1357 do_pragma_system_header); | |
| 1358 register_pragma_internal (pfile, "GCC", "dependency", do_pragma_dependency); | |
| 111 | 1359 register_pragma_internal (pfile, "GCC", "warning", do_pragma_warning); |
| 1360 register_pragma_internal (pfile, "GCC", "error", do_pragma_error); | |
| 0 | 1361 } |
| 1362 | |
| 1363 /* Return the number of registered pragmas in PE. */ | |
| 1364 | |
| 1365 static int | |
| 1366 count_registered_pragmas (struct pragma_entry *pe) | |
| 1367 { | |
| 1368 int ct = 0; | |
| 1369 for (; pe != NULL; pe = pe->next) | |
| 1370 { | |
| 1371 if (pe->is_nspace) | |
| 1372 ct += count_registered_pragmas (pe->u.space); | |
| 1373 ct++; | |
| 1374 } | |
| 1375 return ct; | |
| 1376 } | |
| 1377 | |
| 1378 /* Save into SD the names of the registered pragmas referenced by PE, | |
| 1379 and return a pointer to the next free space in SD. */ | |
| 1380 | |
| 1381 static char ** | |
| 1382 save_registered_pragmas (struct pragma_entry *pe, char **sd) | |
| 1383 { | |
| 1384 for (; pe != NULL; pe = pe->next) | |
| 1385 { | |
| 1386 if (pe->is_nspace) | |
| 1387 sd = save_registered_pragmas (pe->u.space, sd); | |
| 1388 *sd++ = (char *) xmemdup (HT_STR (&pe->pragma->ident), | |
| 1389 HT_LEN (&pe->pragma->ident), | |
| 1390 HT_LEN (&pe->pragma->ident) + 1); | |
| 1391 } | |
| 1392 return sd; | |
| 1393 } | |
| 1394 | |
| 1395 /* Return a newly-allocated array which saves the names of the | |
| 1396 registered pragmas. */ | |
| 1397 | |
| 1398 char ** | |
| 1399 _cpp_save_pragma_names (cpp_reader *pfile) | |
| 1400 { | |
| 1401 int ct = count_registered_pragmas (pfile->pragmas); | |
| 1402 char **result = XNEWVEC (char *, ct); | |
| 1403 (void) save_registered_pragmas (pfile->pragmas, result); | |
| 1404 return result; | |
| 1405 } | |
| 1406 | |
| 1407 /* Restore from SD the names of the registered pragmas referenced by PE, | |
| 1408 and return a pointer to the next unused name in SD. */ | |
| 1409 | |
| 1410 static char ** | |
| 1411 restore_registered_pragmas (cpp_reader *pfile, struct pragma_entry *pe, | |
| 1412 char **sd) | |
| 1413 { | |
| 1414 for (; pe != NULL; pe = pe->next) | |
| 1415 { | |
| 1416 if (pe->is_nspace) | |
| 1417 sd = restore_registered_pragmas (pfile, pe->u.space, sd); | |
| 1418 pe->pragma = cpp_lookup (pfile, UC *sd, strlen (*sd)); | |
| 1419 free (*sd); | |
| 1420 sd++; | |
| 1421 } | |
| 1422 return sd; | |
| 1423 } | |
| 1424 | |
| 1425 /* Restore the names of the registered pragmas from SAVED. */ | |
| 1426 | |
| 1427 void | |
| 1428 _cpp_restore_pragma_names (cpp_reader *pfile, char **saved) | |
| 1429 { | |
| 1430 (void) restore_registered_pragmas (pfile, pfile->pragmas, saved); | |
| 1431 free (saved); | |
| 1432 } | |
| 1433 | |
| 1434 /* Pragmata handling. We handle some, and pass the rest on to the | |
| 1435 front end. C99 defines three pragmas and says that no macro | |
| 1436 expansion is to be performed on them; whether or not macro | |
| 1437 expansion happens for other pragmas is implementation defined. | |
| 1438 This implementation allows for a mix of both, since GCC did not | |
| 1439 traditionally macro expand its (few) pragmas, whereas OpenMP | |
| 1440 specifies that macro expansion should happen. */ | |
| 1441 static void | |
| 1442 do_pragma (cpp_reader *pfile) | |
| 1443 { | |
| 1444 const struct pragma_entry *p = NULL; | |
| 111 | 1445 const cpp_token *token, *pragma_token; |
| 1446 source_location pragma_token_virt_loc = 0; | |
| 0 | 1447 cpp_token ns_token; |
| 1448 unsigned int count = 1; | |
| 1449 | |
| 1450 pfile->state.prevent_expansion++; | |
| 1451 | |
| 111 | 1452 pragma_token = token = cpp_get_token_with_location (pfile, |
| 1453 &pragma_token_virt_loc); | |
| 0 | 1454 ns_token = *token; |
| 1455 if (token->type == CPP_NAME) | |
| 1456 { | |
|
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47
diff
changeset
|
1457 p = lookup_pragma_entry (pfile->pragmas, token->val.node.node); |
| 0 | 1458 if (p && p->is_nspace) |
| 1459 { | |
| 1460 bool allow_name_expansion = p->allow_expansion; | |
| 1461 if (allow_name_expansion) | |
| 1462 pfile->state.prevent_expansion--; | |
| 111 | 1463 |
| 0 | 1464 token = cpp_get_token (pfile); |
| 1465 if (token->type == CPP_NAME) | |
|
55
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parents:
47
diff
changeset
|
1466 p = lookup_pragma_entry (p->u.space, token->val.node.node); |
| 0 | 1467 else |
| 1468 p = NULL; | |
| 1469 if (allow_name_expansion) | |
| 1470 pfile->state.prevent_expansion++; | |
| 1471 count = 2; | |
| 1472 } | |
| 1473 } | |
| 1474 | |
| 1475 if (p) | |
| 1476 { | |
| 1477 if (p->is_deferred) | |
| 1478 { | |
| 111 | 1479 pfile->directive_result.src_loc = pragma_token_virt_loc; |
| 0 | 1480 pfile->directive_result.type = CPP_PRAGMA; |
| 1481 pfile->directive_result.flags = pragma_token->flags; | |
| 1482 pfile->directive_result.val.pragma = p->u.ident; | |
| 1483 pfile->state.in_deferred_pragma = true; | |
| 1484 pfile->state.pragma_allow_expansion = p->allow_expansion; | |
| 1485 if (!p->allow_expansion) | |
| 1486 pfile->state.prevent_expansion++; | |
| 1487 } | |
| 1488 else | |
| 1489 { | |
| 1490 /* Since the handler below doesn't get the line number, that | |
| 1491 it might need for diagnostics, make sure it has the right | |
| 1492 numbers in place. */ | |
| 1493 if (pfile->cb.line_change) | |
| 1494 (*pfile->cb.line_change) (pfile, pragma_token, false); | |
| 1495 if (p->allow_expansion) | |
| 1496 pfile->state.prevent_expansion--; | |
| 1497 (*p->u.handler) (pfile); | |
| 1498 if (p->allow_expansion) | |
| 1499 pfile->state.prevent_expansion++; | |
| 1500 } | |
| 1501 } | |
| 1502 else if (pfile->cb.def_pragma) | |
| 1503 { | |
| 1504 if (count == 1 || pfile->context->prev == NULL) | |
| 1505 _cpp_backup_tokens (pfile, count); | |
| 1506 else | |
| 1507 { | |
| 1508 /* Invalid name comes from macro expansion, _cpp_backup_tokens | |
| 1509 won't allow backing 2 tokens. */ | |
| 1510 /* ??? The token buffer is leaked. Perhaps if def_pragma hook | |
| 1511 reads both tokens, we could perhaps free it, but if it doesn't, | |
| 1512 we don't know the exact lifespan. */ | |
| 1513 cpp_token *toks = XNEWVEC (cpp_token, 2); | |
| 1514 toks[0] = ns_token; | |
| 1515 toks[0].flags |= NO_EXPAND; | |
| 1516 toks[1] = *token; | |
| 1517 toks[1].flags |= NO_EXPAND; | |
| 1518 _cpp_push_token_context (pfile, NULL, toks, 2); | |
| 1519 } | |
| 1520 pfile->cb.def_pragma (pfile, pfile->directive_line); | |
| 1521 } | |
| 1522 | |
| 1523 pfile->state.prevent_expansion--; | |
| 1524 } | |
| 1525 | |
| 1526 /* Handle #pragma once. */ | |
| 1527 static void | |
| 1528 do_pragma_once (cpp_reader *pfile) | |
| 1529 { | |
| 1530 if (cpp_in_primary_file (pfile)) | |
| 1531 cpp_error (pfile, CPP_DL_WARNING, "#pragma once in main file"); | |
| 1532 | |
|
55
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1533 check_eol (pfile, false); |
| 0 | 1534 _cpp_mark_file_once_only (pfile, pfile->buffer->file); |
| 1535 } | |
| 1536 | |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1537 /* Handle #pragma push_macro(STRING). */ |
|
3bfb6c00c1e0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1538 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
|
1539 do_pragma_push_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
|
1540 { |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1541 cpp_hashnode *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
|
1542 size_t defnlen; |
|
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
|
1543 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
|
1544 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
|
1545 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
|
1546 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
|
1547 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
|
1548 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1549 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
|
1550 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
|
1551 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1552 source_location src_loc = pfile->cur_token[-1].src_loc; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1553 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
|
1554 "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
|
1555 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
|
1556 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
|
1557 return; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1558 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1559 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
|
1560 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
|
1561 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
|
1562 while (src < limit) |
|
3bfb6c00c1e0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1563 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1564 /* 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
|
1565 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
|
1566 src++; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1567 *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
|
1568 } |
|
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 = 0; |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1570 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
|
1571 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
|
1572 c = XNEW (struct def_pragma_macro); |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff
changeset
|
1573 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
|
1574 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
|
1575 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
|
1576 c->next = pfile->pushed_macros; |
|
67
f6334be47118
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63
diff
changeset
|
1577 node = _cpp_lex_identifier (pfile, c->name); |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1578 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
|
1579 c->is_undef = 1; |
|
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 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
|
1581 { |
|
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
|
1582 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>
parents:
63
diff
changeset
|
1583 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
|
1584 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>
parents:
63
diff
changeset
|
1585 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
|
1586 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
|
1587 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
|
1588 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
|
1589 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
|
1590 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
|
1591 } |
|
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 |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1593 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
|
1594 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1595 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1596 /* 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
|
1597 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
|
1598 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
|
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 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
|
1601 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
|
1602 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
|
1603 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
|
1604 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
|
1605 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
|
1606 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1607 source_location src_loc = pfile->cur_token[-1].src_loc; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1608 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
|
1609 "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
|
1610 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
|
1611 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
|
1612 return; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1613 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1614 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
|
1615 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
|
1616 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
|
1617 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
|
1618 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1619 /* 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
|
1620 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
|
1621 src++; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1622 *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
|
1623 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1624 *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
|
1625 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
|
1626 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
|
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 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
|
1629 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1630 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
|
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 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
|
1633 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
|
1634 else |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1635 l->next = c->next; |
|
67
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
|
1636 cpp_pop_definition (pfile, c); |
|
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
|
1637 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
|
1638 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
|
1639 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
|
1640 break; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1641 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1642 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
|
1643 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
|
1644 } |
|
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 |
| 0 | 1647 /* Handle #pragma GCC poison, to poison one or more identifiers so |
| 1648 that the lexer produces a hard error for each subsequent usage. */ | |
| 1649 static void | |
| 1650 do_pragma_poison (cpp_reader *pfile) | |
| 1651 { | |
| 1652 const cpp_token *tok; | |
| 1653 cpp_hashnode *hp; | |
| 1654 | |
| 1655 pfile->state.poisoned_ok = 1; | |
| 1656 for (;;) | |
| 1657 { | |
| 1658 tok = _cpp_lex_token (pfile); | |
| 1659 if (tok->type == CPP_EOF) | |
| 1660 break; | |
| 1661 if (tok->type != CPP_NAME) | |
| 1662 { | |
| 1663 cpp_error (pfile, CPP_DL_ERROR, | |
| 1664 "invalid #pragma GCC poison directive"); | |
| 1665 break; | |
| 1666 } | |
| 1667 | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1668 hp = tok->val.node.node; |
| 0 | 1669 if (hp->flags & NODE_POISONED) |
| 1670 continue; | |
| 1671 | |
| 131 | 1672 if (cpp_macro_p (hp)) |
| 0 | 1673 cpp_error (pfile, CPP_DL_WARNING, "poisoning existing macro \"%s\"", |
| 1674 NODE_NAME (hp)); | |
| 1675 _cpp_free_definition (hp); | |
| 1676 hp->flags |= NODE_POISONED | NODE_DIAGNOSTIC; | |
| 1677 } | |
| 1678 pfile->state.poisoned_ok = 0; | |
| 1679 } | |
| 1680 | |
| 1681 /* Mark the current header as a system header. This will suppress | |
| 1682 some categories of warnings (notably those from -pedantic). It is | |
| 1683 intended for use in system libraries that cannot be implemented in | |
| 1684 conforming C, but cannot be certain that their headers appear in a | |
| 1685 system include directory. To prevent abuse, it is rejected in the | |
| 1686 primary source file. */ | |
| 1687 static void | |
| 1688 do_pragma_system_header (cpp_reader *pfile) | |
| 1689 { | |
| 1690 if (cpp_in_primary_file (pfile)) | |
| 1691 cpp_error (pfile, CPP_DL_WARNING, | |
| 1692 "#pragma system_header ignored outside include file"); | |
| 1693 else | |
| 1694 { | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1695 check_eol (pfile, false); |
| 0 | 1696 skip_rest_of_line (pfile); |
| 1697 cpp_make_system_header (pfile, 1, 0); | |
| 1698 } | |
| 1699 } | |
| 1700 | |
| 1701 /* Check the modified date of the current include file against a specified | |
| 1702 file. Issue a diagnostic, if the specified file is newer. We use this to | |
| 1703 determine if a fixed header should be refixed. */ | |
| 1704 static void | |
| 1705 do_pragma_dependency (cpp_reader *pfile) | |
| 1706 { | |
| 1707 const char *fname; | |
| 1708 int angle_brackets, ordering; | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1709 source_location location; |
| 0 | 1710 |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1711 fname = parse_include (pfile, &angle_brackets, NULL, &location); |
| 0 | 1712 if (!fname) |
| 1713 return; | |
| 1714 | |
| 1715 ordering = _cpp_compare_file_date (pfile, fname, angle_brackets); | |
| 1716 if (ordering < 0) | |
| 1717 cpp_error (pfile, CPP_DL_WARNING, "cannot find source file %s", fname); | |
| 1718 else if (ordering > 0) | |
| 1719 { | |
| 1720 cpp_error (pfile, CPP_DL_WARNING, | |
| 1721 "current file is older than %s", fname); | |
| 1722 if (cpp_get_token (pfile)->type != CPP_EOF) | |
| 1723 { | |
| 1724 _cpp_backup_tokens (pfile, 1); | |
| 131 | 1725 do_diagnostic (pfile, CPP_DL_WARNING, CPP_W_NONE, 0); |
| 0 | 1726 } |
| 1727 } | |
| 1728 | |
| 1729 free ((void *) fname); | |
| 1730 } | |
| 1731 | |
| 111 | 1732 /* Issue a diagnostic with the message taken from the pragma. If |
| 1733 ERROR is true, the diagnostic is a warning, otherwise, it is an | |
| 1734 error. */ | |
| 1735 static void | |
| 1736 do_pragma_warning_or_error (cpp_reader *pfile, bool error) | |
| 1737 { | |
| 1738 const cpp_token *tok = _cpp_lex_token (pfile); | |
| 1739 cpp_string str; | |
| 1740 if (tok->type != CPP_STRING | |
| 1741 || !cpp_interpret_string_notranslate (pfile, &tok->val.str, 1, &str, | |
| 1742 CPP_STRING) | |
| 1743 || str.len == 0) | |
| 1744 { | |
| 1745 cpp_error (pfile, CPP_DL_ERROR, "invalid \"#pragma GCC %s\" directive", | |
| 1746 error ? "error" : "warning"); | |
| 1747 return; | |
| 1748 } | |
| 1749 cpp_error (pfile, error ? CPP_DL_ERROR : CPP_DL_WARNING, | |
| 1750 "%s", str.text); | |
| 1751 free ((void *)str.text); | |
| 1752 } | |
| 1753 | |
| 1754 /* Issue a warning diagnostic. */ | |
| 1755 static void | |
| 1756 do_pragma_warning (cpp_reader *pfile) | |
| 1757 { | |
| 1758 do_pragma_warning_or_error (pfile, false); | |
| 1759 } | |
| 1760 | |
| 1761 /* Issue an error diagnostic. */ | |
| 1762 static void | |
| 1763 do_pragma_error (cpp_reader *pfile) | |
| 1764 { | |
| 1765 do_pragma_warning_or_error (pfile, true); | |
| 1766 } | |
| 1767 | |
| 0 | 1768 /* Get a token but skip padding. */ |
| 1769 static const cpp_token * | |
| 1770 get_token_no_padding (cpp_reader *pfile) | |
| 1771 { | |
| 1772 for (;;) | |
| 1773 { | |
| 1774 const cpp_token *result = cpp_get_token (pfile); | |
| 1775 if (result->type != CPP_PADDING) | |
| 1776 return result; | |
| 1777 } | |
| 1778 } | |
| 1779 | |
| 1780 /* Check syntax is "(string-literal)". Returns the string on success, | |
| 1781 or NULL on failure. */ | |
| 1782 static const cpp_token * | |
| 1783 get__Pragma_string (cpp_reader *pfile) | |
| 1784 { | |
| 1785 const cpp_token *string; | |
| 1786 const cpp_token *paren; | |
| 1787 | |
| 1788 paren = get_token_no_padding (pfile); | |
| 1789 if (paren->type == CPP_EOF) | |
| 1790 _cpp_backup_tokens (pfile, 1); | |
| 1791 if (paren->type != CPP_OPEN_PAREN) | |
| 1792 return NULL; | |
| 1793 | |
| 1794 string = get_token_no_padding (pfile); | |
| 1795 if (string->type == CPP_EOF) | |
| 1796 _cpp_backup_tokens (pfile, 1); | |
| 1797 if (string->type != CPP_STRING && string->type != CPP_WSTRING | |
|
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1798 && string->type != CPP_STRING32 && string->type != CPP_STRING16 |
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1799 && string->type != CPP_UTF8STRING) |
| 0 | 1800 return NULL; |
| 1801 | |
| 1802 paren = get_token_no_padding (pfile); | |
| 1803 if (paren->type == CPP_EOF) | |
| 1804 _cpp_backup_tokens (pfile, 1); | |
| 1805 if (paren->type != CPP_CLOSE_PAREN) | |
| 1806 return NULL; | |
| 1807 | |
| 1808 return string; | |
| 1809 } | |
| 1810 | |
| 1811 /* Destringize IN into a temporary buffer, by removing the first \ of | |
| 1812 \" and \\ sequences, and process the result as a #pragma directive. */ | |
| 1813 static void | |
| 111 | 1814 destringize_and_run (cpp_reader *pfile, const cpp_string *in, |
| 1815 source_location expansion_loc) | |
| 0 | 1816 { |
| 1817 const unsigned char *src, *limit; | |
| 1818 char *dest, *result; | |
| 1819 cpp_context *saved_context; | |
| 1820 cpp_token *saved_cur_token; | |
| 1821 tokenrun *saved_cur_run; | |
| 1822 cpp_token *toks; | |
| 1823 int count; | |
| 1824 const struct directive *save_directive; | |
| 1825 | |
| 1826 dest = result = (char *) alloca (in->len - 1); | |
| 1827 src = in->text + 1 + (in->text[0] == 'L'); | |
| 1828 limit = in->text + in->len - 1; | |
| 1829 while (src < limit) | |
| 1830 { | |
| 1831 /* We know there is a character following the backslash. */ | |
| 1832 if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
| 1833 src++; | |
| 1834 *dest++ = *src++; | |
| 1835 } | |
| 1836 *dest = '\n'; | |
| 1837 | |
| 1838 /* Ugh; an awful kludge. We are really not set up to be lexing | |
| 1839 tokens when in the middle of a macro expansion. Use a new | |
| 1840 context to force cpp_get_token to lex, and so skip_rest_of_line | |
| 1841 doesn't go beyond the end of the text. Also, remember the | |
| 1842 current lexing position so we can return to it later. | |
| 1843 | |
| 1844 Something like line-at-a-time lexing should remove the need for | |
| 1845 this. */ | |
| 1846 saved_context = pfile->context; | |
| 1847 saved_cur_token = pfile->cur_token; | |
| 1848 saved_cur_run = pfile->cur_run; | |
| 1849 | |
| 111 | 1850 pfile->context = XCNEW (cpp_context); |
| 0 | 1851 |
| 1852 /* Inline run_directive, since we need to delay the _cpp_pop_buffer | |
| 1853 until we've read all of the tokens that we want. */ | |
| 1854 cpp_push_buffer (pfile, (const uchar *) result, dest - result, | |
| 1855 /* from_stage3 */ true); | |
| 1856 /* ??? Antique Disgusting Hack. What does this do? */ | |
| 1857 if (pfile->buffer->prev) | |
| 1858 pfile->buffer->file = pfile->buffer->prev->file; | |
| 1859 | |
| 1860 start_directive (pfile); | |
| 1861 _cpp_clean_line (pfile); | |
| 1862 save_directive = pfile->directive; | |
| 1863 pfile->directive = &dtable[T_PRAGMA]; | |
| 1864 do_pragma (pfile); | |
| 1865 end_directive (pfile, 1); | |
| 1866 pfile->directive = save_directive; | |
| 1867 | |
| 1868 /* We always insert at least one token, the directive result. It'll | |
| 1869 either be a CPP_PADDING or a CPP_PRAGMA. In the later case, we | |
| 1870 need to insert *all* of the tokens, including the CPP_PRAGMA_EOL. */ | |
| 1871 | |
| 1872 /* If we're not handling the pragma internally, read all of the tokens from | |
| 1873 the string buffer now, while the string buffer is still installed. */ | |
| 1874 /* ??? Note that the token buffer allocated here is leaked. It's not clear | |
| 1875 to me what the true lifespan of the tokens are. It would appear that | |
| 1876 the lifespan is the entire parse of the main input stream, in which case | |
| 1877 this may not be wrong. */ | |
| 1878 if (pfile->directive_result.type == CPP_PRAGMA) | |
| 1879 { | |
| 1880 int maxcount; | |
| 1881 | |
| 1882 count = 1; | |
| 1883 maxcount = 50; | |
| 1884 toks = XNEWVEC (cpp_token, maxcount); | |
| 1885 toks[0] = pfile->directive_result; | |
| 1886 | |
| 1887 do | |
| 1888 { | |
| 1889 if (count == maxcount) | |
| 1890 { | |
| 1891 maxcount = maxcount * 3 / 2; | |
| 1892 toks = XRESIZEVEC (cpp_token, toks, maxcount); | |
| 1893 } | |
| 1894 toks[count] = *cpp_get_token (pfile); | |
| 111 | 1895 /* _Pragma is a builtin, so we're not within a macro-map, and so |
| 1896 the token locations are set to bogus ordinary locations | |
| 1897 near to, but after that of the "_Pragma". | |
| 1898 Paper over this by setting them equal to the location of the | |
| 1899 _Pragma itself (PR preprocessor/69126). */ | |
| 1900 toks[count].src_loc = expansion_loc; | |
| 0 | 1901 /* Macros have been already expanded by cpp_get_token |
| 1902 if the pragma allowed expansion. */ | |
| 1903 toks[count++].flags |= NO_EXPAND; | |
| 1904 } | |
| 1905 while (toks[count-1].type != CPP_PRAGMA_EOL); | |
| 1906 } | |
| 1907 else | |
| 1908 { | |
| 1909 count = 1; | |
| 1910 toks = XNEW (cpp_token); | |
| 1911 toks[0] = pfile->directive_result; | |
| 1912 | |
| 1913 /* If we handled the entire pragma internally, make sure we get the | |
| 1914 line number correct for the next token. */ | |
| 1915 if (pfile->cb.line_change) | |
| 1916 pfile->cb.line_change (pfile, pfile->cur_token, false); | |
| 1917 } | |
| 1918 | |
| 1919 /* Finish inlining run_directive. */ | |
| 1920 pfile->buffer->file = NULL; | |
| 1921 _cpp_pop_buffer (pfile); | |
| 1922 | |
| 1923 /* Reset the old macro state before ... */ | |
| 1924 XDELETE (pfile->context); | |
| 1925 pfile->context = saved_context; | |
| 1926 pfile->cur_token = saved_cur_token; | |
| 1927 pfile->cur_run = saved_cur_run; | |
| 1928 | |
| 1929 /* ... inserting the new tokens we collected. */ | |
| 1930 _cpp_push_token_context (pfile, NULL, toks, count); | |
| 1931 } | |
| 1932 | |
| 1933 /* Handle the _Pragma operator. Return 0 on error, 1 if ok. */ | |
| 1934 int | |
| 111 | 1935 _cpp_do__Pragma (cpp_reader *pfile, source_location expansion_loc) |
| 0 | 1936 { |
| 1937 const cpp_token *string = get__Pragma_string (pfile); | |
| 1938 pfile->directive_result.type = CPP_PADDING; | |
| 1939 | |
| 1940 if (string) | |
| 1941 { | |
| 111 | 1942 destringize_and_run (pfile, &string->val.str, expansion_loc); |
| 0 | 1943 return 1; |
| 1944 } | |
| 1945 cpp_error (pfile, CPP_DL_ERROR, | |
| 1946 "_Pragma takes a parenthesized string literal"); | |
| 1947 return 0; | |
| 1948 } | |
| 1949 | |
| 1950 /* Handle #ifdef. */ | |
| 1951 static void | |
| 1952 do_ifdef (cpp_reader *pfile) | |
| 1953 { | |
| 1954 int skip = 1; | |
| 1955 | |
| 1956 if (! pfile->state.skipping) | |
| 1957 { | |
| 1958 cpp_hashnode *node = lex_macro_node (pfile, false); | |
| 1959 | |
| 1960 if (node) | |
| 1961 { | |
| 111 | 1962 /* Do not treat conditional macros as being defined. This is due to |
| 1963 the powerpc and spu ports using conditional macros for 'vector', | |
| 1964 'bool', and 'pixel' to act as conditional keywords. This messes | |
| 1965 up tests like #ifndef bool. */ | |
| 131 | 1966 skip = !cpp_macro_p (node) || (node->flags & NODE_CONDITIONAL); |
| 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 |
| 1992 the powerpc and spu ports using conditional macros for 'vector', | |
| 1993 'bool', and 'pixel' to act as conditional keywords. This messes | |
| 1994 up tests like #ifndef bool. */ | |
| 131 | 1995 skip = (cpp_macro_p (node) |
| 1996 && !(node->flags & NODE_CONDITIONAL)); | |
| 0 | 1997 _cpp_mark_macro_used (node); |
| 131 | 1998 _cpp_maybe_notify_macro_use (pfile, node); |
|
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1999 if (pfile->cb.used) |
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2000 pfile->cb.used (pfile, pfile->directive_line, node); |
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2001 check_eol (pfile, false); |
| 0 | 2002 } |
| 2003 } | |
| 2004 | |
| 2005 push_conditional (pfile, skip, T_IFNDEF, node); | |
| 2006 } | |
| 2007 | |
| 2008 /* _cpp_parse_expr puts a macro in a "#if !defined ()" expression in | |
| 2009 pfile->mi_ind_cmacro so we can handle multiple-include | |
| 2010 optimizations. If macro expansion occurs in the expression, we | |
| 2011 cannot treat it as a controlling conditional, since the expansion | |
| 2012 could change in the future. That is handled by cpp_get_token. */ | |
| 2013 static void | |
| 2014 do_if (cpp_reader *pfile) | |
| 2015 { | |
| 2016 int skip = 1; | |
| 2017 | |
| 2018 if (! pfile->state.skipping) | |
| 2019 skip = _cpp_parse_expr (pfile, true) == false; | |
| 2020 | |
| 2021 push_conditional (pfile, skip, T_IF, pfile->mi_ind_cmacro); | |
| 2022 } | |
| 2023 | |
| 2024 /* Flip skipping state if appropriate and continue without changing | |
| 2025 if_stack; this is so that the error message for missing #endif's | |
| 2026 etc. will point to the original #if. */ | |
| 2027 static void | |
| 2028 do_else (cpp_reader *pfile) | |
| 2029 { | |
| 2030 cpp_buffer *buffer = pfile->buffer; | |
| 2031 struct if_stack *ifs = buffer->if_stack; | |
| 2032 | |
| 2033 if (ifs == NULL) | |
| 2034 cpp_error (pfile, CPP_DL_ERROR, "#else without #if"); | |
| 2035 else | |
| 2036 { | |
| 2037 if (ifs->type == T_ELSE) | |
| 2038 { | |
| 2039 cpp_error (pfile, CPP_DL_ERROR, "#else after #else"); | |
| 2040 cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
| 2041 "the conditional began here"); | |
| 2042 } | |
| 2043 ifs->type = T_ELSE; | |
| 2044 | |
| 2045 /* Skip any future (erroneous) #elses or #elifs. */ | |
| 2046 pfile->state.skipping = ifs->skip_elses; | |
| 2047 ifs->skip_elses = true; | |
| 2048 | |
| 2049 /* Invalidate any controlling macro. */ | |
| 2050 ifs->mi_cmacro = 0; | |
| 2051 | |
| 2052 /* Only check EOL if was not originally skipping. */ | |
| 2053 if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) | |
| 111 | 2054 check_eol_endif_labels (pfile); |
| 0 | 2055 } |
| 2056 } | |
| 2057 | |
| 2058 /* Handle a #elif directive by not changing if_stack either. See the | |
| 2059 comment above do_else. */ | |
| 2060 static void | |
| 2061 do_elif (cpp_reader *pfile) | |
| 2062 { | |
| 2063 cpp_buffer *buffer = pfile->buffer; | |
| 2064 struct if_stack *ifs = buffer->if_stack; | |
| 2065 | |
| 2066 if (ifs == NULL) | |
| 2067 cpp_error (pfile, CPP_DL_ERROR, "#elif without #if"); | |
| 2068 else | |
| 2069 { | |
| 2070 if (ifs->type == T_ELSE) | |
| 2071 { | |
| 2072 cpp_error (pfile, CPP_DL_ERROR, "#elif after #else"); | |
| 2073 cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
| 2074 "the conditional began here"); | |
| 2075 } | |
| 2076 ifs->type = T_ELIF; | |
| 2077 | |
| 111 | 2078 /* See DR#412: "Only the first group whose control condition |
| 2079 evaluates to true (nonzero) is processed; any following groups | |
| 2080 are skipped and their controlling directives are processed as | |
| 2081 if they were in a group that is skipped." */ | |
| 2082 if (ifs->skip_elses) | |
| 2083 pfile->state.skipping = 1; | |
| 2084 else | |
| 0 | 2085 { |
| 111 | 2086 pfile->state.skipping = ! _cpp_parse_expr (pfile, false); |
| 2087 ifs->skip_elses = ! pfile->state.skipping; | |
| 0 | 2088 } |
| 2089 | |
| 2090 /* Invalidate any controlling macro. */ | |
| 2091 ifs->mi_cmacro = 0; | |
| 2092 } | |
| 2093 } | |
| 2094 | |
| 2095 /* #endif pops the if stack and resets pfile->state.skipping. */ | |
| 2096 static void | |
| 2097 do_endif (cpp_reader *pfile) | |
| 2098 { | |
| 2099 cpp_buffer *buffer = pfile->buffer; | |
| 2100 struct if_stack *ifs = buffer->if_stack; | |
| 2101 | |
| 2102 if (ifs == NULL) | |
| 2103 cpp_error (pfile, CPP_DL_ERROR, "#endif without #if"); | |
| 2104 else | |
| 2105 { | |
| 2106 /* Only check EOL if was not originally skipping. */ | |
| 2107 if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) | |
| 111 | 2108 check_eol_endif_labels (pfile); |
| 0 | 2109 |
| 2110 /* If potential control macro, we go back outside again. */ | |
| 2111 if (ifs->next == 0 && ifs->mi_cmacro) | |
| 2112 { | |
| 2113 pfile->mi_valid = true; | |
| 2114 pfile->mi_cmacro = ifs->mi_cmacro; | |
| 2115 } | |
| 2116 | |
| 2117 buffer->if_stack = ifs->next; | |
| 2118 pfile->state.skipping = ifs->was_skipping; | |
| 2119 obstack_free (&pfile->buffer_ob, ifs); | |
| 2120 } | |
| 2121 } | |
| 2122 | |
| 2123 /* Push an if_stack entry for a preprocessor conditional, and set | |
| 2124 pfile->state.skipping to SKIP. If TYPE indicates the conditional | |
| 2125 is #if or #ifndef, CMACRO is a potentially controlling macro, and | |
| 2126 we need to check here that we are at the top of the file. */ | |
| 2127 static void | |
| 2128 push_conditional (cpp_reader *pfile, int skip, int type, | |
| 2129 const cpp_hashnode *cmacro) | |
| 2130 { | |
| 2131 struct if_stack *ifs; | |
| 2132 cpp_buffer *buffer = pfile->buffer; | |
| 2133 | |
| 2134 ifs = XOBNEW (&pfile->buffer_ob, struct if_stack); | |
| 2135 ifs->line = pfile->directive_line; | |
| 2136 ifs->next = buffer->if_stack; | |
| 2137 ifs->skip_elses = pfile->state.skipping || !skip; | |
| 2138 ifs->was_skipping = pfile->state.skipping; | |
| 2139 ifs->type = type; | |
| 2140 /* This condition is effectively a test for top-of-file. */ | |
| 2141 if (pfile->mi_valid && pfile->mi_cmacro == 0) | |
| 2142 ifs->mi_cmacro = cmacro; | |
| 2143 else | |
| 2144 ifs->mi_cmacro = 0; | |
| 2145 | |
| 2146 pfile->state.skipping = skip; | |
| 2147 buffer->if_stack = ifs; | |
| 2148 } | |
| 2149 | |
| 2150 /* Read the tokens of the answer into the macro pool, in a directive | |
| 2151 of type TYPE. Only commit the memory if we intend it as permanent | |
| 2152 storage, i.e. the #assert case. Returns 0 on success, and sets | |
|
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2153 ANSWERP to point to the answer. PRED_LOC is the location of the |
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2154 predicate. */ |
| 131 | 2155 static bool |
| 2156 parse_answer (cpp_reader *pfile, int type, source_location pred_loc, | |
| 2157 cpp_macro **answer_ptr) | |
| 0 | 2158 { |
| 2159 /* In a conditional, it is legal to not have an open paren. We | |
| 2160 should save the following token in this case. */ | |
| 131 | 2161 const cpp_token *paren = cpp_get_token (pfile); |
| 0 | 2162 |
| 2163 /* If not a paren, see if we're OK. */ | |
| 2164 if (paren->type != CPP_OPEN_PAREN) | |
| 2165 { | |
| 2166 /* In a conditional no answer is a test for any answer. It | |
| 2167 could be followed by any token. */ | |
| 2168 if (type == T_IF) | |
| 2169 { | |
| 2170 _cpp_backup_tokens (pfile, 1); | |
| 131 | 2171 return true; |
| 0 | 2172 } |
| 2173 | |
| 2174 /* #unassert with no answer is valid - it removes all answers. */ | |
| 2175 if (type == T_UNASSERT && paren->type == CPP_EOF) | |
| 131 | 2176 return true; |
| 0 | 2177 |
|
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2178 cpp_error_with_line (pfile, CPP_DL_ERROR, pred_loc, 0, |
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2179 "missing '(' after predicate"); |
| 131 | 2180 return false; |
| 0 | 2181 } |
| 2182 | |
| 131 | 2183 cpp_macro *answer = _cpp_new_macro (pfile, cmk_assert, |
| 2184 _cpp_reserve_room (pfile, 0, | |
| 2185 sizeof (cpp_macro))); | |
| 2186 answer->parm.next = NULL; | |
| 2187 unsigned count = 0; | |
| 2188 for (;;) | |
| 0 | 2189 { |
| 2190 const cpp_token *token = cpp_get_token (pfile); | |
| 2191 | |
| 2192 if (token->type == CPP_CLOSE_PAREN) | |
| 2193 break; | |
| 2194 | |
| 2195 if (token->type == CPP_EOF) | |
| 2196 { | |
| 2197 cpp_error (pfile, CPP_DL_ERROR, "missing ')' to complete answer"); | |
| 131 | 2198 return false; |
| 0 | 2199 } |
| 2200 | |
| 131 | 2201 answer = (cpp_macro *)_cpp_reserve_room |
| 2202 (pfile, sizeof (cpp_macro) + count * sizeof (cpp_token), | |
| 2203 sizeof (cpp_token)); | |
| 2204 answer->exp.tokens[count++] = *token; | |
| 0 | 2205 } |
| 2206 | |
| 131 | 2207 if (!count) |
| 0 | 2208 { |
| 2209 cpp_error (pfile, CPP_DL_ERROR, "predicate's answer is empty"); | |
| 131 | 2210 return false; |
| 0 | 2211 } |
| 2212 | |
| 131 | 2213 /* Drop whitespace at start, for answer equivalence purposes. */ |
| 2214 answer->exp.tokens[0].flags &= ~PREV_WHITE; | |
| 0 | 2215 |
| 131 | 2216 answer->count = count; |
| 2217 *answer_ptr = answer; | |
| 2218 | |
| 2219 return true; | |
| 0 | 2220 } |
| 2221 | |
| 2222 /* Parses an assertion directive of type TYPE, returning a pointer to | |
| 131 | 2223 the hash node of the predicate, or 0 on error. The node is |
| 2224 guaranteed to be disjoint from the macro namespace, so can only | |
| 2225 have type 'NT_VOID'. If an answer was supplied, it is placed in | |
| 2226 *ANSWER_PTR, which is otherwise set to 0. */ | |
| 0 | 2227 static cpp_hashnode * |
| 131 | 2228 parse_assertion (cpp_reader *pfile, int type, cpp_macro **answer_ptr) |
| 0 | 2229 { |
| 2230 cpp_hashnode *result = 0; | |
| 2231 | |
| 2232 /* We don't expand predicates or answers. */ | |
| 2233 pfile->state.prevent_expansion++; | |
| 2234 | |
| 131 | 2235 *answer_ptr = NULL; |
| 2236 | |
| 2237 const cpp_token *predicate = cpp_get_token (pfile); | |
| 0 | 2238 if (predicate->type == CPP_EOF) |
| 2239 cpp_error (pfile, CPP_DL_ERROR, "assertion without predicate"); | |
| 2240 else if (predicate->type != CPP_NAME) | |
|
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2241 cpp_error_with_line (pfile, CPP_DL_ERROR, predicate->src_loc, 0, |
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2242 "predicate must be an identifier"); |
| 131 | 2243 else if (parse_answer (pfile, type, predicate->src_loc, answer_ptr)) |
| 0 | 2244 { |
|
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2245 unsigned int len = NODE_LEN (predicate->val.node.node); |
| 0 | 2246 unsigned char *sym = (unsigned char *) alloca (len + 1); |
| 2247 | |
| 2248 /* Prefix '#' to get it out of macro namespace. */ | |
| 2249 sym[0] = '#'; | |
|
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2250 memcpy (sym + 1, NODE_NAME (predicate->val.node.node), len); |
| 0 | 2251 result = cpp_lookup (pfile, sym, len + 1); |
| 2252 } | |
| 2253 | |
| 2254 pfile->state.prevent_expansion--; | |
| 131 | 2255 |
| 0 | 2256 return result; |
| 2257 } | |
| 2258 | |
| 2259 /* Returns a pointer to the pointer to CANDIDATE in the answer chain, | |
| 2260 or a pointer to NULL if the answer is not in the chain. */ | |
| 131 | 2261 static cpp_macro ** |
| 2262 find_answer (cpp_hashnode *node, const cpp_macro *candidate) | |
| 0 | 2263 { |
| 2264 unsigned int i; | |
| 131 | 2265 cpp_macro **result = NULL; |
| 0 | 2266 |
| 131 | 2267 for (result = &node->value.answers; *result; result = &(*result)->parm.next) |
| 0 | 2268 { |
| 131 | 2269 cpp_macro *answer = *result; |
| 0 | 2270 |
| 2271 if (answer->count == candidate->count) | |
| 2272 { | |
| 2273 for (i = 0; i < answer->count; i++) | |
| 131 | 2274 if (!_cpp_equiv_tokens (&answer->exp.tokens[i], |
| 2275 &candidate->exp.tokens[i])) | |
| 0 | 2276 break; |
| 2277 | |
| 2278 if (i == answer->count) | |
| 2279 break; | |
| 2280 } | |
| 2281 } | |
| 2282 | |
| 2283 return result; | |
| 2284 } | |
| 2285 | |
| 2286 /* Test an assertion within a preprocessor conditional. Returns | |
| 2287 nonzero on failure, zero on success. On success, the result of | |
| 2288 the test is written into VALUE, otherwise the value 0. */ | |
| 2289 int | |
| 2290 _cpp_test_assertion (cpp_reader *pfile, unsigned int *value) | |
| 2291 { | |
| 131 | 2292 cpp_macro *answer; |
| 2293 cpp_hashnode *node = parse_assertion (pfile, T_IF, &answer); | |
| 0 | 2294 |
| 2295 /* For recovery, an erroneous assertion expression is handled as a | |
| 2296 failing assertion. */ | |
| 2297 *value = 0; | |
| 2298 | |
| 2299 if (node) | |
| 131 | 2300 { |
| 2301 if (node->value.answers) | |
| 2302 *value = !answer || *find_answer (node, answer); | |
| 2303 } | |
| 0 | 2304 else if (pfile->cur_token[-1].type == CPP_EOF) |
| 2305 _cpp_backup_tokens (pfile, 1); | |
| 2306 | |
| 2307 /* We don't commit the memory for the answer - it's temporary only. */ | |
| 2308 return node == 0; | |
| 2309 } | |
| 2310 | |
| 2311 /* Handle #assert. */ | |
| 2312 static void | |
| 2313 do_assert (cpp_reader *pfile) | |
| 2314 { | |
| 131 | 2315 cpp_macro *answer; |
| 2316 cpp_hashnode *node = parse_assertion (pfile, T_ASSERT, &answer); | |
| 0 | 2317 |
| 2318 if (node) | |
| 2319 { | |
| 2320 /* Place the new answer in the answer list. First check there | |
| 2321 is not a duplicate. */ | |
| 131 | 2322 if (*find_answer (node, answer)) |
| 0 | 2323 { |
| 131 | 2324 cpp_error (pfile, CPP_DL_WARNING, "\"%s\" re-asserted", |
| 2325 NODE_NAME (node) + 1); | |
| 2326 return; | |
| 0 | 2327 } |
| 2328 | |
| 131 | 2329 /* Commit or allocate storage for the answer. */ |
| 2330 answer = (cpp_macro *)_cpp_commit_buff | |
| 2331 (pfile, sizeof (cpp_macro) - sizeof (cpp_token) | |
| 2332 + sizeof (cpp_token) * answer->count); | |
| 0 | 2333 |
| 131 | 2334 /* Chain into the list. */ |
| 2335 answer->parm.next = node->value.answers; | |
| 2336 node->value.answers = answer; | |
| 2337 | |
|
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2338 check_eol (pfile, false); |
| 0 | 2339 } |
| 2340 } | |
| 2341 | |
| 2342 /* Handle #unassert. */ | |
| 2343 static void | |
| 2344 do_unassert (cpp_reader *pfile) | |
| 2345 { | |
| 131 | 2346 cpp_macro *answer; |
| 2347 cpp_hashnode *node = parse_assertion (pfile, T_UNASSERT, &answer); | |
| 0 | 2348 |
| 2349 /* It isn't an error to #unassert something that isn't asserted. */ | |
| 131 | 2350 if (node) |
| 0 | 2351 { |
| 2352 if (answer) | |
| 2353 { | |
| 131 | 2354 cpp_macro **p = find_answer (node, answer); |
| 0 | 2355 |
| 131 | 2356 /* Remove the assert from the list. */ |
| 2357 if (cpp_macro *temp = *p) | |
| 2358 *p = temp->parm.next; | |
| 0 | 2359 |
|
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2360 check_eol (pfile, false); |
| 0 | 2361 } |
| 2362 else | |
| 2363 _cpp_free_definition (node); | |
| 2364 } | |
| 2365 | |
| 2366 /* We don't commit the memory for the answer - it's temporary only. */ | |
| 2367 } | |
| 2368 | |
| 2369 /* These are for -D, -U, -A. */ | |
| 2370 | |
| 2371 /* Process the string STR as if it appeared as the body of a #define. | |
| 2372 If STR is just an identifier, define it with value 1. | |
| 2373 If STR has anything after the identifier, then it should | |
| 2374 be identifier=definition. */ | |
| 2375 void | |
| 2376 cpp_define (cpp_reader *pfile, const char *str) | |
| 2377 { | |
|
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2378 char *buf; |
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2379 const char *p; |
| 0 | 2380 size_t count; |
| 2381 | |
| 2382 /* Copy the entire option so we can modify it. | |
| 2383 Change the first "=" in the string to a space. If there is none, | |
| 2384 tack " 1" on the end. */ | |
| 2385 | |
| 2386 count = strlen (str); | |
| 2387 buf = (char *) alloca (count + 3); | |
| 2388 memcpy (buf, str, count); | |
| 2389 | |
| 2390 p = strchr (str, '='); | |
| 2391 if (p) | |
| 2392 buf[p - str] = ' '; | |
| 2393 else | |
| 2394 { | |
| 2395 buf[count++] = ' '; | |
| 2396 buf[count++] = '1'; | |
| 2397 } | |
| 2398 buf[count] = '\n'; | |
| 2399 | |
| 2400 run_directive (pfile, T_DEFINE, buf, count); | |
| 2401 } | |
| 2402 | |
| 2403 | |
| 2404 /* Use to build macros to be run through cpp_define() as | |
| 2405 described above. | |
| 2406 Example: cpp_define_formatted (pfile, "MACRO=%d", value); */ | |
| 2407 | |
| 2408 void | |
| 2409 cpp_define_formatted (cpp_reader *pfile, const char *fmt, ...) | |
| 2410 { | |
| 111 | 2411 char *ptr; |
| 0 | 2412 |
| 2413 va_list ap; | |
| 2414 va_start (ap, fmt); | |
| 111 | 2415 ptr = xvasprintf (fmt, ap); |
| 0 | 2416 va_end (ap); |
| 2417 | |
| 2418 cpp_define (pfile, ptr); | |
| 2419 free (ptr); | |
| 2420 } | |
| 2421 | |
| 2422 | |
| 2423 /* Slight variant of the above for use by initialize_builtins. */ | |
| 2424 void | |
| 2425 _cpp_define_builtin (cpp_reader *pfile, const char *str) | |
| 2426 { | |
| 2427 size_t len = strlen (str); | |
| 2428 char *buf = (char *) alloca (len + 1); | |
| 2429 memcpy (buf, str, len); | |
| 2430 buf[len] = '\n'; | |
| 2431 run_directive (pfile, T_DEFINE, buf, len); | |
| 2432 } | |
| 2433 | |
| 2434 /* Process MACRO as if it appeared as the body of an #undef. */ | |
| 2435 void | |
| 2436 cpp_undef (cpp_reader *pfile, const char *macro) | |
| 2437 { | |
| 2438 size_t len = strlen (macro); | |
| 2439 char *buf = (char *) alloca (len + 1); | |
| 2440 memcpy (buf, macro, len); | |
| 2441 buf[len] = '\n'; | |
| 2442 run_directive (pfile, T_UNDEF, buf, len); | |
| 2443 } | |
| 2444 | |
|
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2445 /* Replace a previous definition DEF of the macro STR. If DEF is NULL, |
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2446 or first element is zero, then the macro should be undefined. */ |
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2447 static void |
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2448 cpp_pop_definition (cpp_reader *pfile, struct def_pragma_macro *c) |
| 0 | 2449 { |
|
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2450 cpp_hashnode *node = _cpp_lex_identifier (pfile, c->name); |
| 0 | 2451 if (node == NULL) |
| 2452 return; | |
| 2453 | |
| 2454 if (pfile->cb.before_define) | |
| 2455 pfile->cb.before_define (pfile); | |
| 2456 | |
| 131 | 2457 if (cpp_macro_p (node)) |
| 0 | 2458 { |
| 2459 if (pfile->cb.undef) | |
| 2460 pfile->cb.undef (pfile, pfile->directive_line, node); | |
| 2461 if (CPP_OPTION (pfile, warn_unused_macros)) | |
| 2462 _cpp_warn_if_unused_macro (pfile, node, NULL); | |
| 131 | 2463 _cpp_free_definition (node); |
| 0 | 2464 } |
| 2465 | |
|
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2466 if (c->is_undef) |
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2467 return; |
| 131 | 2468 |
|
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2469 { |
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2470 size_t namelen; |
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2471 const uchar *dn; |
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2472 cpp_hashnode *h = NULL; |
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2473 cpp_buffer *nbuf; |
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2474 |
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2475 namelen = ustrcspn (c->definition, "( \n"); |
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2476 h = cpp_lookup (pfile, c->definition, namelen); |
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2477 dn = c->definition + namelen; |
| 0 | 2478 |
|
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2479 nbuf = cpp_push_buffer (pfile, dn, ustrchr (dn, '\n') - dn, true); |
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2480 if (nbuf != NULL) |
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2481 { |
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2482 _cpp_clean_line (pfile); |
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2483 nbuf->sysp = 1; |
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2484 if (!_cpp_create_definition (pfile, h)) |
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2485 abort (); |
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2486 _cpp_pop_buffer (pfile); |
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2487 } |
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2488 else |
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2489 abort (); |
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2490 h->value.macro->line = c->line; |
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2491 h->value.macro->syshdr = c->syshdr; |
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2492 h->value.macro->used = c->used; |
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|
2493 } |
| 0 | 2494 } |
| 2495 | |
| 2496 /* Process the string STR as if it appeared as the body of a #assert. */ | |
| 2497 void | |
| 2498 cpp_assert (cpp_reader *pfile, const char *str) | |
| 2499 { | |
| 2500 handle_assertion (pfile, str, T_ASSERT); | |
| 2501 } | |
| 2502 | |
| 2503 /* Process STR as if it appeared as the body of an #unassert. */ | |
| 2504 void | |
| 2505 cpp_unassert (cpp_reader *pfile, const char *str) | |
| 2506 { | |
| 2507 handle_assertion (pfile, str, T_UNASSERT); | |
| 2508 } | |
| 2509 | |
| 2510 /* Common code for cpp_assert (-A) and cpp_unassert (-A-). */ | |
| 2511 static void | |
| 2512 handle_assertion (cpp_reader *pfile, const char *str, int type) | |
| 2513 { | |
| 2514 size_t count = strlen (str); | |
| 2515 const char *p = strchr (str, '='); | |
| 2516 | |
| 2517 /* Copy the entire option so we can modify it. Change the first | |
| 2518 "=" in the string to a '(', and tack a ')' on the end. */ | |
| 2519 char *buf = (char *) alloca (count + 2); | |
| 2520 | |
| 2521 memcpy (buf, str, count); | |
| 2522 if (p) | |
| 2523 { | |
| 2524 buf[p - str] = '('; | |
| 2525 buf[count++] = ')'; | |
| 2526 } | |
| 2527 buf[count] = '\n'; | |
| 2528 str = buf; | |
| 2529 | |
| 2530 run_directive (pfile, type, str, count); | |
| 2531 } | |
| 2532 | |
| 2533 /* The options structure. */ | |
| 2534 cpp_options * | |
| 2535 cpp_get_options (cpp_reader *pfile) | |
| 2536 { | |
| 2537 return &pfile->opts; | |
| 2538 } | |
| 2539 | |
| 2540 /* The callbacks structure. */ | |
| 2541 cpp_callbacks * | |
| 2542 cpp_get_callbacks (cpp_reader *pfile) | |
| 2543 { | |
| 2544 return &pfile->cb; | |
| 2545 } | |
| 2546 | |
| 2547 /* Copy the given callbacks structure to our own. */ | |
| 2548 void | |
| 2549 cpp_set_callbacks (cpp_reader *pfile, cpp_callbacks *cb) | |
| 2550 { | |
| 2551 pfile->cb = *cb; | |
| 2552 } | |
| 2553 | |
| 2554 /* The dependencies structure. (Creates one if it hasn't already been.) */ | |
| 2555 struct deps * | |
| 2556 cpp_get_deps (cpp_reader *pfile) | |
| 2557 { | |
| 2558 if (!pfile->deps) | |
| 2559 pfile->deps = deps_init (); | |
| 2560 return pfile->deps; | |
| 2561 } | |
| 2562 | |
| 2563 /* Push a new buffer on the buffer stack. Returns the new buffer; it | |
| 2564 doesn't fail. It does not generate a file change call back; that | |
| 2565 is the responsibility of the caller. */ | |
| 2566 cpp_buffer * | |
| 2567 cpp_push_buffer (cpp_reader *pfile, const uchar *buffer, size_t len, | |
| 2568 int from_stage3) | |
| 2569 { | |
| 2570 cpp_buffer *new_buffer = XOBNEW (&pfile->buffer_ob, cpp_buffer); | |
| 2571 | |
| 2572 /* Clears, amongst other things, if_stack and mi_cmacro. */ | |
| 2573 memset (new_buffer, 0, sizeof (cpp_buffer)); | |
| 2574 | |
| 2575 new_buffer->next_line = new_buffer->buf = buffer; | |
| 2576 new_buffer->rlimit = buffer + len; | |
| 2577 new_buffer->from_stage3 = from_stage3; | |
| 2578 new_buffer->prev = pfile->buffer; | |
| 2579 new_buffer->need_line = true; | |
| 2580 | |
| 2581 pfile->buffer = new_buffer; | |
| 2582 | |
| 2583 return new_buffer; | |
| 2584 } | |
| 2585 | |
| 2586 /* Pops a single buffer, with a file change call-back if appropriate. | |
| 2587 Then pushes the next -include file, if any remain. */ | |
| 2588 void | |
| 2589 _cpp_pop_buffer (cpp_reader *pfile) | |
| 2590 { | |
| 2591 cpp_buffer *buffer = pfile->buffer; | |
| 2592 struct _cpp_file *inc = buffer->file; | |
| 2593 struct if_stack *ifs; | |
| 111 | 2594 const unsigned char *to_free; |
| 0 | 2595 |
| 2596 /* Walk back up the conditional stack till we reach its level at | |
| 2597 entry to this file, issuing error messages. */ | |
| 2598 for (ifs = buffer->if_stack; ifs; ifs = ifs->next) | |
| 2599 cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
| 2600 "unterminated #%s", dtable[ifs->type].name); | |
| 2601 | |
| 2602 /* In case of a missing #endif. */ | |
| 2603 pfile->state.skipping = 0; | |
| 2604 | |
| 2605 /* _cpp_do_file_change expects pfile->buffer to be the new one. */ | |
| 2606 pfile->buffer = buffer->prev; | |
| 2607 | |
| 111 | 2608 to_free = buffer->to_free; |
| 0 | 2609 free (buffer->notes); |
| 2610 | |
| 2611 /* Free the buffer object now; we may want to push a new buffer | |
| 2612 in _cpp_push_next_include_file. */ | |
| 2613 obstack_free (&pfile->buffer_ob, buffer); | |
| 2614 | |
| 2615 if (inc) | |
| 2616 { | |
| 111 | 2617 _cpp_pop_file_buffer (pfile, inc, to_free); |
| 0 | 2618 |
| 2619 _cpp_do_file_change (pfile, LC_LEAVE, 0, 0, 0); | |
| 2620 } | |
| 2621 } | |
| 2622 | |
| 2623 /* Enter all recognized directives in the hash table. */ | |
| 2624 void | |
| 2625 _cpp_init_directives (cpp_reader *pfile) | |
| 2626 { | |
| 2627 unsigned int i; | |
| 2628 cpp_hashnode *node; | |
| 2629 | |
| 2630 for (i = 0; i < (unsigned int) N_DIRECTIVES; i++) | |
| 2631 { | |
| 2632 node = cpp_lookup (pfile, dtable[i].name, dtable[i].length); | |
| 2633 node->is_directive = 1; | |
| 2634 node->directive_index = i; | |
| 2635 } | |
| 2636 } | |
| 111 | 2637 |
| 2638 /* Extract header file from a bracket include. Parsing starts after '<'. | |
| 2639 The string is malloced and must be freed by the caller. */ | |
| 2640 char * | |
| 2641 _cpp_bracket_include(cpp_reader *pfile) | |
| 2642 { | |
| 2643 return glue_header_name (pfile); | |
| 2644 } | |
| 2645 |