Mercurial > hg > CbC > CbC_gcc
annotate libcpp/directives.c @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
| author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 22 Mar 2011 17:18:12 +0900 |
| parents | b7f97abdc517 |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* CPP Library. (Directive handling.) |
| 2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
| 3 1999, 2000, 2001, 2002, 2003, 2004, 2005, | |
|
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4 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
| 0 | 5 Contributed by Per Bothner, 1994-95. |
| 6 Based on CCCP program by Paul Rubin, June 1986 | |
| 7 Adapted to ANSI C, Richard Stallman, Jan 1987 | |
| 8 | |
| 9 This program is free software; you can redistribute it and/or modify it | |
| 10 under the terms of the GNU General Public License as published by the | |
| 11 Free Software Foundation; either version 3, or (at your option) any | |
| 12 later version. | |
| 13 | |
| 14 This program is distributed in the hope that it will be useful, | |
| 15 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 17 GNU General Public License for more details. | |
| 18 | |
| 19 You should have received a copy of the GNU General Public License | |
| 20 along with this program; see the file COPYING3. If not see | |
| 21 <http://www.gnu.org/licenses/>. */ | |
| 22 | |
| 23 #include "config.h" | |
| 24 #include "system.h" | |
| 25 #include "cpplib.h" | |
| 26 #include "internal.h" | |
| 27 #include "mkdeps.h" | |
| 28 #include "obstack.h" | |
| 29 | |
| 30 /* Stack of conditionals currently in progress | |
| 31 (including both successful and failing conditionals). */ | |
| 32 struct if_stack | |
| 33 { | |
| 34 struct if_stack *next; | |
| 35 linenum_type line; /* Line where condition started. */ | |
| 36 const cpp_hashnode *mi_cmacro;/* macro name for #ifndef around entire file */ | |
| 37 bool skip_elses; /* Can future #else / #elif be skipped? */ | |
| 38 bool was_skipping; /* If were skipping on entry. */ | |
| 39 int type; /* Most recent conditional for diagnostics. */ | |
| 40 }; | |
| 41 | |
| 42 /* Contains a registered pragma or pragma namespace. */ | |
| 43 typedef void (*pragma_cb) (cpp_reader *); | |
| 44 struct pragma_entry | |
| 45 { | |
| 46 struct pragma_entry *next; | |
| 47 const cpp_hashnode *pragma; /* Name and length. */ | |
| 48 bool is_nspace; | |
| 49 bool is_internal; | |
| 50 bool is_deferred; | |
| 51 bool allow_expansion; | |
| 52 union { | |
| 53 pragma_cb handler; | |
| 54 struct pragma_entry *space; | |
| 55 unsigned int ident; | |
| 56 } u; | |
| 57 }; | |
| 58 | |
| 59 /* Values for the origin field of struct directive. KANDR directives | |
| 60 come from traditional (K&R) C. STDC89 directives come from the | |
| 61 1989 C standard. EXTENSION directives are extensions. */ | |
| 62 #define KANDR 0 | |
| 63 #define STDC89 1 | |
| 64 #define EXTENSION 2 | |
| 65 | |
| 66 /* Values for the flags field of struct directive. COND indicates a | |
| 67 conditional; IF_COND an opening conditional. INCL means to treat | |
| 68 "..." and <...> as q-char and h-char sequences respectively. IN_I | |
| 69 means this directive should be handled even if -fpreprocessed is in | |
| 70 effect (these are the directives with callback hooks). | |
| 71 | |
| 72 EXPAND is set on directives that are always macro-expanded. */ | |
| 73 #define COND (1 << 0) | |
| 74 #define IF_COND (1 << 1) | |
| 75 #define INCL (1 << 2) | |
| 76 #define IN_I (1 << 3) | |
| 77 #define EXPAND (1 << 4) | |
| 78 #define DEPRECATED (1 << 5) | |
| 79 | |
| 80 /* Defines one #-directive, including how to handle it. */ | |
| 81 typedef void (*directive_handler) (cpp_reader *); | |
| 82 typedef struct directive directive; | |
| 83 struct directive | |
| 84 { | |
| 85 directive_handler handler; /* Function to handle directive. */ | |
| 86 const uchar *name; /* Name of directive. */ | |
| 87 unsigned short length; /* Length of name. */ | |
| 88 unsigned char origin; /* Origin of directive. */ | |
| 89 unsigned char flags; /* Flags describing this directive. */ | |
| 90 }; | |
| 91 | |
| 92 /* Forward declarations. */ | |
| 93 | |
| 94 static void skip_rest_of_line (cpp_reader *); | |
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95 static void check_eol (cpp_reader *, bool); |
| 0 | 96 static void start_directive (cpp_reader *); |
| 97 static void prepare_directive_trad (cpp_reader *); | |
| 98 static void end_directive (cpp_reader *, int); | |
| 99 static void directive_diagnostics (cpp_reader *, const directive *, int); | |
| 100 static void run_directive (cpp_reader *, int, const char *, size_t); | |
| 101 static char *glue_header_name (cpp_reader *); | |
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102 static const char *parse_include (cpp_reader *, int *, const cpp_token ***, |
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103 source_location *); |
| 0 | 104 static void push_conditional (cpp_reader *, int, int, const cpp_hashnode *); |
| 105 static unsigned int read_flag (cpp_reader *, unsigned int); | |
| 106 static bool strtolinenum (const uchar *, size_t, linenum_type *, bool *); | |
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107 static void do_diagnostic (cpp_reader *, int, int, int); |
| 0 | 108 static cpp_hashnode *lex_macro_node (cpp_reader *, bool); |
| 109 static int undefine_macros (cpp_reader *, cpp_hashnode *, void *); | |
| 110 static void do_include_common (cpp_reader *, enum include_type); | |
| 111 static struct pragma_entry *lookup_pragma_entry (struct pragma_entry *, | |
| 112 const cpp_hashnode *); | |
| 113 static int count_registered_pragmas (struct pragma_entry *); | |
| 114 static char ** save_registered_pragmas (struct pragma_entry *, char **); | |
| 115 static char ** restore_registered_pragmas (cpp_reader *, struct pragma_entry *, | |
| 116 char **); | |
| 117 static void do_pragma_once (cpp_reader *); | |
| 118 static void do_pragma_poison (cpp_reader *); | |
| 119 static void do_pragma_system_header (cpp_reader *); | |
| 120 static void do_pragma_dependency (cpp_reader *); | |
| 121 static void do_linemarker (cpp_reader *); | |
| 122 static const cpp_token *get_token_no_padding (cpp_reader *); | |
| 123 static const cpp_token *get__Pragma_string (cpp_reader *); | |
| 124 static void destringize_and_run (cpp_reader *, const cpp_string *); | |
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125 static int parse_answer (cpp_reader *, struct answer **, int, source_location); |
| 0 | 126 static cpp_hashnode *parse_assertion (cpp_reader *, struct answer **, int); |
| 127 static struct answer ** find_answer (cpp_hashnode *, const struct answer *); | |
| 128 static void handle_assertion (cpp_reader *, const char *, int); | |
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129 static void do_pragma_push_macro (cpp_reader *); |
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130 static void do_pragma_pop_macro (cpp_reader *); |
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131 static void cpp_pop_definition (cpp_reader *, struct def_pragma_macro *); |
| 0 | 132 |
| 133 /* This is the table of directive handlers. It is ordered by | |
| 134 frequency of occurrence; the numbers at the end are directive | |
| 135 counts from all the source code I have lying around (egcs and libc | |
| 136 CVS as of 1999-05-18, plus grub-0.5.91, linux-2.2.9, and | |
| 137 pcmcia-cs-3.0.9). This is no longer important as directive lookup | |
| 138 is now O(1). All extensions other than #warning, #include_next, | |
| 139 and #import are deprecated. The name is where the extension | |
| 140 appears to have come from. */ | |
| 141 | |
| 142 #define DIRECTIVE_TABLE \ | |
| 143 D(define, T_DEFINE = 0, KANDR, IN_I) /* 270554 */ \ | |
| 144 D(include, T_INCLUDE, KANDR, INCL | EXPAND) /* 52262 */ \ | |
| 145 D(endif, T_ENDIF, KANDR, COND) /* 45855 */ \ | |
| 146 D(ifdef, T_IFDEF, KANDR, COND | IF_COND) /* 22000 */ \ | |
| 147 D(if, T_IF, KANDR, COND | IF_COND | EXPAND) /* 18162 */ \ | |
| 148 D(else, T_ELSE, KANDR, COND) /* 9863 */ \ | |
| 149 D(ifndef, T_IFNDEF, KANDR, COND | IF_COND) /* 9675 */ \ | |
| 150 D(undef, T_UNDEF, KANDR, IN_I) /* 4837 */ \ | |
| 151 D(line, T_LINE, KANDR, EXPAND) /* 2465 */ \ | |
| 152 D(elif, T_ELIF, STDC89, COND | EXPAND) /* 610 */ \ | |
| 153 D(error, T_ERROR, STDC89, 0) /* 475 */ \ | |
| 154 D(pragma, T_PRAGMA, STDC89, IN_I) /* 195 */ \ | |
| 155 D(warning, T_WARNING, EXTENSION, 0) /* 22 */ \ | |
| 156 D(include_next, T_INCLUDE_NEXT, EXTENSION, INCL | EXPAND) /* 19 */ \ | |
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157 D(ident, T_IDENT, EXTENSION, IN_I) /* 11 */ \ |
| 0 | 158 D(import, T_IMPORT, EXTENSION, INCL | EXPAND) /* 0 ObjC */ \ |
| 159 D(assert, T_ASSERT, EXTENSION, DEPRECATED) /* 0 SVR4 */ \ | |
| 160 D(unassert, T_UNASSERT, EXTENSION, DEPRECATED) /* 0 SVR4 */ \ | |
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161 D(sccs, T_SCCS, EXTENSION, IN_I) /* 0 SVR4? */ |
| 0 | 162 |
| 163 /* #sccs is synonymous with #ident. */ | |
| 164 #define do_sccs do_ident | |
| 165 | |
| 166 /* Use the table to generate a series of prototypes, an enum for the | |
| 167 directive names, and an array of directive handlers. */ | |
| 168 | |
| 169 #define D(name, t, o, f) static void do_##name (cpp_reader *); | |
| 170 DIRECTIVE_TABLE | |
| 171 #undef D | |
| 172 | |
| 173 #define D(n, tag, o, f) tag, | |
| 174 enum | |
| 175 { | |
| 176 DIRECTIVE_TABLE | |
| 177 N_DIRECTIVES | |
| 178 }; | |
| 179 #undef D | |
| 180 | |
| 181 #define D(name, t, origin, flags) \ | |
| 182 { do_##name, (const uchar *) #name, \ | |
| 183 sizeof #name - 1, origin, flags }, | |
| 184 static const directive dtable[] = | |
| 185 { | |
| 186 DIRECTIVE_TABLE | |
| 187 }; | |
| 188 #undef D | |
| 189 #undef DIRECTIVE_TABLE | |
| 190 | |
| 191 /* Wrapper struct directive for linemarkers. | |
| 192 The origin is more or less true - the original K+R cpp | |
| 193 did use this notation in its preprocessed output. */ | |
| 194 static const directive linemarker_dir = | |
| 195 { | |
| 196 do_linemarker, UC"#", 1, KANDR, IN_I | |
| 197 }; | |
| 198 | |
| 199 #define SEEN_EOL() (pfile->cur_token[-1].type == CPP_EOF) | |
| 200 | |
| 201 /* Skip any remaining tokens in a directive. */ | |
| 202 static void | |
| 203 skip_rest_of_line (cpp_reader *pfile) | |
| 204 { | |
| 205 /* Discard all stacked contexts. */ | |
| 206 while (pfile->context->prev) | |
| 207 _cpp_pop_context (pfile); | |
| 208 | |
| 209 /* Sweep up all tokens remaining on the line. */ | |
| 210 if (! SEEN_EOL ()) | |
| 211 while (_cpp_lex_token (pfile)->type != CPP_EOF) | |
| 212 ; | |
| 213 } | |
| 214 | |
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215 /* Ensure there are no stray tokens at the end of a directive. If |
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216 EXPAND is true, tokens macro-expanding to nothing are allowed. */ |
| 0 | 217 static void |
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218 check_eol (cpp_reader *pfile, bool expand) |
| 0 | 219 { |
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220 if (! SEEN_EOL () && (expand |
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221 ? cpp_get_token (pfile) |
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222 : _cpp_lex_token (pfile))->type != CPP_EOF) |
| 0 | 223 cpp_error (pfile, CPP_DL_PEDWARN, "extra tokens at end of #%s directive", |
| 224 pfile->directive->name); | |
| 225 } | |
| 226 | |
| 227 /* Ensure there are no stray tokens other than comments at the end of | |
| 228 a directive, and gather the comments. */ | |
| 229 static const cpp_token ** | |
| 230 check_eol_return_comments (cpp_reader *pfile) | |
| 231 { | |
| 232 size_t c; | |
| 233 size_t capacity = 8; | |
| 234 const cpp_token **buf; | |
| 235 | |
| 236 buf = XNEWVEC (const cpp_token *, capacity); | |
| 237 c = 0; | |
| 238 if (! SEEN_EOL ()) | |
| 239 { | |
| 240 while (1) | |
| 241 { | |
| 242 const cpp_token *tok; | |
| 243 | |
| 244 tok = _cpp_lex_token (pfile); | |
| 245 if (tok->type == CPP_EOF) | |
| 246 break; | |
| 247 if (tok->type != CPP_COMMENT) | |
| 248 cpp_error (pfile, CPP_DL_PEDWARN, | |
| 249 "extra tokens at end of #%s directive", | |
| 250 pfile->directive->name); | |
| 251 else | |
| 252 { | |
| 253 if (c + 1 >= capacity) | |
| 254 { | |
| 255 capacity *= 2; | |
| 256 buf = XRESIZEVEC (const cpp_token *, buf, capacity); | |
| 257 } | |
| 258 buf[c] = tok; | |
| 259 ++c; | |
| 260 } | |
| 261 } | |
| 262 } | |
| 263 buf[c] = NULL; | |
| 264 return buf; | |
| 265 } | |
| 266 | |
| 267 /* Called when entering a directive, _Pragma or command-line directive. */ | |
| 268 static void | |
| 269 start_directive (cpp_reader *pfile) | |
| 270 { | |
| 271 /* Setup in-directive state. */ | |
| 272 pfile->state.in_directive = 1; | |
| 273 pfile->state.save_comments = 0; | |
| 274 pfile->directive_result.type = CPP_PADDING; | |
| 275 | |
| 276 /* Some handlers need the position of the # for diagnostics. */ | |
| 277 pfile->directive_line = pfile->line_table->highest_line; | |
| 278 } | |
| 279 | |
| 280 /* Called when leaving a directive, _Pragma or command-line directive. */ | |
| 281 static void | |
| 282 end_directive (cpp_reader *pfile, int skip_line) | |
| 283 { | |
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284 if (CPP_OPTION (pfile, traditional)) |
| 0 | 285 { |
| 286 /* Revert change of prepare_directive_trad. */ | |
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287 if (!pfile->state.in_deferred_pragma) |
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288 pfile->state.prevent_expansion--; |
| 0 | 289 |
| 290 if (pfile->directive != &dtable[T_DEFINE]) | |
| 291 _cpp_remove_overlay (pfile); | |
| 292 } | |
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293 else if (pfile->state.in_deferred_pragma) |
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294 ; |
| 0 | 295 /* We don't skip for an assembler #. */ |
| 296 else if (skip_line) | |
| 297 { | |
| 298 skip_rest_of_line (pfile); | |
| 299 if (!pfile->keep_tokens) | |
| 300 { | |
| 301 pfile->cur_run = &pfile->base_run; | |
| 302 pfile->cur_token = pfile->base_run.base; | |
| 303 } | |
| 304 } | |
| 305 | |
| 306 /* Restore state. */ | |
| 307 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
| 308 pfile->state.in_directive = 0; | |
| 309 pfile->state.in_expression = 0; | |
| 310 pfile->state.angled_headers = 0; | |
| 311 pfile->directive = 0; | |
| 312 } | |
| 313 | |
| 314 /* Prepare to handle the directive in pfile->directive. */ | |
| 315 static void | |
| 316 prepare_directive_trad (cpp_reader *pfile) | |
| 317 { | |
| 318 if (pfile->directive != &dtable[T_DEFINE]) | |
| 319 { | |
| 320 bool no_expand = (pfile->directive | |
| 321 && ! (pfile->directive->flags & EXPAND)); | |
| 322 bool was_skipping = pfile->state.skipping; | |
| 323 | |
| 324 pfile->state.in_expression = (pfile->directive == &dtable[T_IF] | |
| 325 || pfile->directive == &dtable[T_ELIF]); | |
| 326 if (pfile->state.in_expression) | |
| 327 pfile->state.skipping = false; | |
| 328 | |
| 329 if (no_expand) | |
| 330 pfile->state.prevent_expansion++; | |
| 331 _cpp_scan_out_logical_line (pfile, NULL); | |
| 332 if (no_expand) | |
| 333 pfile->state.prevent_expansion--; | |
| 334 | |
| 335 pfile->state.skipping = was_skipping; | |
| 336 _cpp_overlay_buffer (pfile, pfile->out.base, | |
| 337 pfile->out.cur - pfile->out.base); | |
| 338 } | |
| 339 | |
| 340 /* Stop ISO C from expanding anything. */ | |
| 341 pfile->state.prevent_expansion++; | |
| 342 } | |
| 343 | |
| 344 /* Output diagnostics for a directive DIR. INDENTED is nonzero if | |
| 345 the '#' was indented. */ | |
| 346 static void | |
| 347 directive_diagnostics (cpp_reader *pfile, const directive *dir, int indented) | |
| 348 { | |
| 349 /* Issue -pedantic or deprecated warnings for extensions. We let | |
| 350 -pedantic take precedence if both are applicable. */ | |
| 351 if (! pfile->state.skipping) | |
| 352 { | |
| 353 if (dir->origin == EXTENSION | |
| 354 && !(dir == &dtable[T_IMPORT] && CPP_OPTION (pfile, objc)) | |
| 355 && CPP_PEDANTIC (pfile)) | |
| 356 cpp_error (pfile, CPP_DL_PEDWARN, "#%s is a GCC extension", dir->name); | |
| 357 else if (((dir->flags & DEPRECATED) != 0 | |
| 358 || (dir == &dtable[T_IMPORT] && !CPP_OPTION (pfile, objc))) | |
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359 && CPP_OPTION (pfile, cpp_warn_deprecated)) |
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360 cpp_warning (pfile, CPP_W_DEPRECATED, |
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361 "#%s is a deprecated GCC extension", dir->name); |
| 0 | 362 } |
| 363 | |
| 364 /* Traditionally, a directive is ignored unless its # is in | |
| 365 column 1. Therefore in code intended to work with K+R | |
| 366 compilers, directives added by C89 must have their # | |
| 367 indented, and directives present in traditional C must not. | |
| 368 This is true even of directives in skipped conditional | |
| 369 blocks. #elif cannot be used at all. */ | |
| 370 if (CPP_WTRADITIONAL (pfile)) | |
| 371 { | |
| 372 if (dir == &dtable[T_ELIF]) | |
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373 cpp_warning (pfile, CPP_W_TRADITIONAL, |
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374 "suggest not using #elif in traditional C"); |
| 0 | 375 else if (indented && dir->origin == KANDR) |
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376 cpp_warning (pfile, CPP_W_TRADITIONAL, |
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377 "traditional C ignores #%s with the # indented", |
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378 dir->name); |
| 0 | 379 else if (!indented && dir->origin != KANDR) |
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380 cpp_warning (pfile, CPP_W_TRADITIONAL, |
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381 "suggest hiding #%s from traditional C with an indented #", |
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382 dir->name); |
| 0 | 383 } |
| 384 } | |
| 385 | |
| 386 /* Check if we have a known directive. INDENTED is nonzero if the | |
| 387 '#' of the directive was indented. This function is in this file | |
| 388 to save unnecessarily exporting dtable etc. to lex.c. Returns | |
| 389 nonzero if the line of tokens has been handled, zero if we should | |
| 390 continue processing the line. */ | |
| 391 int | |
| 392 _cpp_handle_directive (cpp_reader *pfile, int indented) | |
| 393 { | |
| 394 const directive *dir = 0; | |
| 395 const cpp_token *dname; | |
| 396 bool was_parsing_args = pfile->state.parsing_args; | |
| 397 bool was_discarding_output = pfile->state.discarding_output; | |
| 398 int skip = 1; | |
| 399 | |
| 400 if (was_discarding_output) | |
| 401 pfile->state.prevent_expansion = 0; | |
| 402 | |
| 403 if (was_parsing_args) | |
| 404 { | |
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405 if (CPP_OPTION (pfile, cpp_pedantic)) |
| 0 | 406 cpp_error (pfile, CPP_DL_PEDWARN, |
| 407 "embedding a directive within macro arguments is not portable"); | |
| 408 pfile->state.parsing_args = 0; | |
| 409 pfile->state.prevent_expansion = 0; | |
| 410 } | |
| 411 start_directive (pfile); | |
| 412 dname = _cpp_lex_token (pfile); | |
| 413 | |
| 414 if (dname->type == CPP_NAME) | |
| 415 { | |
|
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416 if (dname->val.node.node->is_directive) |
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417 dir = &dtable[dname->val.node.node->directive_index]; |
| 0 | 418 } |
| 419 /* We do not recognize the # followed by a number extension in | |
| 420 assembler code. */ | |
| 421 else if (dname->type == CPP_NUMBER && CPP_OPTION (pfile, lang) != CLK_ASM) | |
| 422 { | |
| 423 dir = &linemarker_dir; | |
| 424 if (CPP_PEDANTIC (pfile) && ! CPP_OPTION (pfile, preprocessed) | |
| 425 && ! pfile->state.skipping) | |
| 426 cpp_error (pfile, CPP_DL_PEDWARN, | |
| 427 "style of line directive is a GCC extension"); | |
| 428 } | |
| 429 | |
| 430 if (dir) | |
| 431 { | |
| 432 /* If we have a directive that is not an opening conditional, | |
| 433 invalidate any control macro. */ | |
| 434 if (! (dir->flags & IF_COND)) | |
| 435 pfile->mi_valid = false; | |
| 436 | |
| 437 /* Kluge alert. In order to be sure that code like this | |
| 438 | |
| 439 #define HASH # | |
| 440 HASH define foo bar | |
| 441 | |
| 442 does not cause '#define foo bar' to get executed when | |
| 443 compiled with -save-temps, we recognize directives in | |
| 444 -fpreprocessed mode only if the # is in column 1. macro.c | |
| 445 puts a space in front of any '#' at the start of a macro. | |
| 446 | |
| 447 We exclude the -fdirectives-only case because macro expansion | |
| 448 has not been performed yet, and block comments can cause spaces | |
| 449 to preceed the directive. */ | |
| 450 if (CPP_OPTION (pfile, preprocessed) | |
| 451 && !CPP_OPTION (pfile, directives_only) | |
| 452 && (indented || !(dir->flags & IN_I))) | |
| 453 { | |
| 454 skip = 0; | |
| 455 dir = 0; | |
| 456 } | |
| 457 else | |
| 458 { | |
| 459 /* In failed conditional groups, all non-conditional | |
| 460 directives are ignored. Before doing that, whether | |
| 461 skipping or not, we should lex angle-bracketed headers | |
| 462 correctly, and maybe output some diagnostics. */ | |
| 463 pfile->state.angled_headers = dir->flags & INCL; | |
| 464 pfile->state.directive_wants_padding = dir->flags & INCL; | |
| 465 if (! CPP_OPTION (pfile, preprocessed)) | |
| 466 directive_diagnostics (pfile, dir, indented); | |
| 467 if (pfile->state.skipping && !(dir->flags & COND)) | |
| 468 dir = 0; | |
| 469 } | |
| 470 } | |
| 471 else if (dname->type == CPP_EOF) | |
| 472 ; /* CPP_EOF is the "null directive". */ | |
| 473 else | |
| 474 { | |
| 475 /* An unknown directive. Don't complain about it in assembly | |
| 476 source: we don't know where the comments are, and # may | |
| 477 introduce assembler pseudo-ops. Don't complain about invalid | |
| 478 directives in skipped conditional groups (6.10 p4). */ | |
| 479 if (CPP_OPTION (pfile, lang) == CLK_ASM) | |
| 480 skip = 0; | |
| 481 else if (!pfile->state.skipping) | |
| 482 cpp_error (pfile, CPP_DL_ERROR, "invalid preprocessing directive #%s", | |
| 483 cpp_token_as_text (pfile, dname)); | |
| 484 } | |
| 485 | |
| 486 pfile->directive = dir; | |
| 487 if (CPP_OPTION (pfile, traditional)) | |
| 488 prepare_directive_trad (pfile); | |
| 489 | |
| 490 if (dir) | |
| 491 pfile->directive->handler (pfile); | |
| 492 else if (skip == 0) | |
| 493 _cpp_backup_tokens (pfile, 1); | |
| 494 | |
| 495 end_directive (pfile, skip); | |
| 496 if (was_parsing_args && !pfile->state.in_deferred_pragma) | |
| 497 { | |
| 498 /* Restore state when within macro args. */ | |
| 499 pfile->state.parsing_args = 2; | |
| 500 pfile->state.prevent_expansion = 1; | |
| 501 } | |
| 502 if (was_discarding_output) | |
| 503 pfile->state.prevent_expansion = 1; | |
| 504 return skip; | |
| 505 } | |
| 506 | |
| 507 /* Directive handler wrapper used by the command line option | |
| 508 processor. BUF is \n terminated. */ | |
| 509 static void | |
| 510 run_directive (cpp_reader *pfile, int dir_no, const char *buf, size_t count) | |
| 511 { | |
| 512 cpp_push_buffer (pfile, (const uchar *) buf, count, | |
| 513 /* from_stage3 */ true); | |
| 514 start_directive (pfile); | |
| 515 | |
| 516 /* This is a short-term fix to prevent a leading '#' being | |
| 517 interpreted as a directive. */ | |
| 518 _cpp_clean_line (pfile); | |
| 519 | |
| 520 pfile->directive = &dtable[dir_no]; | |
| 521 if (CPP_OPTION (pfile, traditional)) | |
| 522 prepare_directive_trad (pfile); | |
| 523 pfile->directive->handler (pfile); | |
| 524 end_directive (pfile, 1); | |
| 525 _cpp_pop_buffer (pfile); | |
| 526 } | |
| 527 | |
| 528 /* Checks for validity the macro name in #define, #undef, #ifdef and | |
| 529 #ifndef directives. IS_DEF_OR_UNDEF is true if this call is | |
| 530 processing a #define or #undefine directive, and false | |
| 531 otherwise. */ | |
| 532 static cpp_hashnode * | |
| 533 lex_macro_node (cpp_reader *pfile, bool is_def_or_undef) | |
| 534 { | |
| 535 const cpp_token *token = _cpp_lex_token (pfile); | |
| 536 | |
| 537 /* The token immediately after #define must be an identifier. That | |
| 538 identifier may not be "defined", per C99 6.10.8p4. | |
| 539 In C++, it may not be any of the "named operators" either, | |
| 540 per C++98 [lex.digraph], [lex.key]. | |
| 541 Finally, the identifier may not have been poisoned. (In that case | |
| 542 the lexer has issued the error message for us.) */ | |
| 543 | |
| 544 if (token->type == CPP_NAME) | |
| 545 { | |
|
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546 cpp_hashnode *node = token->val.node.node; |
| 0 | 547 |
| 548 if (is_def_or_undef && node == pfile->spec_nodes.n_defined) | |
| 549 cpp_error (pfile, CPP_DL_ERROR, | |
| 550 "\"defined\" cannot be used as a macro name"); | |
| 551 else if (! (node->flags & NODE_POISONED)) | |
| 552 return node; | |
| 553 } | |
| 554 else if (token->flags & NAMED_OP) | |
| 555 cpp_error (pfile, CPP_DL_ERROR, | |
| 556 "\"%s\" cannot be used as a macro name as it is an operator in C++", | |
|
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557 NODE_NAME (token->val.node.node)); |
| 0 | 558 else if (token->type == CPP_EOF) |
| 559 cpp_error (pfile, CPP_DL_ERROR, "no macro name given in #%s directive", | |
| 560 pfile->directive->name); | |
| 561 else | |
| 562 cpp_error (pfile, CPP_DL_ERROR, "macro names must be identifiers"); | |
| 563 | |
| 564 return NULL; | |
| 565 } | |
| 566 | |
| 567 /* Process a #define directive. Most work is done in macro.c. */ | |
| 568 static void | |
| 569 do_define (cpp_reader *pfile) | |
| 570 { | |
| 571 cpp_hashnode *node = lex_macro_node (pfile, true); | |
| 572 | |
| 573 if (node) | |
| 574 { | |
| 575 /* If we have been requested to expand comments into macros, | |
| 576 then re-enable saving of comments. */ | |
| 577 pfile->state.save_comments = | |
| 578 ! CPP_OPTION (pfile, discard_comments_in_macro_exp); | |
| 579 | |
| 580 if (pfile->cb.before_define) | |
| 581 pfile->cb.before_define (pfile); | |
| 582 | |
| 583 if (_cpp_create_definition (pfile, node)) | |
| 584 if (pfile->cb.define) | |
| 585 pfile->cb.define (pfile, pfile->directive_line, node); | |
| 586 | |
| 587 node->flags &= ~NODE_USED; | |
| 588 } | |
| 589 } | |
| 590 | |
| 591 /* Handle #undef. Mark the identifier NT_VOID in the hash table. */ | |
| 592 static void | |
| 593 do_undef (cpp_reader *pfile) | |
| 594 { | |
| 595 cpp_hashnode *node = lex_macro_node (pfile, true); | |
| 596 | |
| 597 if (node) | |
| 598 { | |
| 599 if (pfile->cb.before_define) | |
| 600 pfile->cb.before_define (pfile); | |
| 601 | |
| 602 if (pfile->cb.undef) | |
| 603 pfile->cb.undef (pfile, pfile->directive_line, node); | |
| 604 | |
| 605 /* 6.10.3.5 paragraph 2: [#undef] is ignored if the specified | |
| 606 identifier is not currently defined as a macro name. */ | |
| 607 if (node->type == NT_MACRO) | |
| 608 { | |
| 609 if (node->flags & NODE_WARN) | |
| 610 cpp_error (pfile, CPP_DL_WARNING, | |
| 611 "undefining \"%s\"", NODE_NAME (node)); | |
| 612 | |
| 613 if (CPP_OPTION (pfile, warn_unused_macros)) | |
| 614 _cpp_warn_if_unused_macro (pfile, node, NULL); | |
| 615 | |
| 616 _cpp_free_definition (node); | |
| 617 } | |
| 618 } | |
| 619 | |
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620 check_eol (pfile, false); |
| 0 | 621 } |
| 622 | |
| 623 /* Undefine a single macro/assertion/whatever. */ | |
| 624 | |
| 625 static int | |
| 626 undefine_macros (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *h, | |
| 627 void *data_p ATTRIBUTE_UNUSED) | |
| 628 { | |
| 629 /* Body of _cpp_free_definition inlined here for speed. | |
| 630 Macros and assertions no longer have anything to free. */ | |
| 631 h->type = NT_VOID; | |
| 632 h->flags &= ~(NODE_POISONED|NODE_BUILTIN|NODE_DISABLED|NODE_USED); | |
| 633 return 1; | |
| 634 } | |
| 635 | |
| 636 /* Undefine all macros and assertions. */ | |
| 637 | |
| 638 void | |
| 639 cpp_undef_all (cpp_reader *pfile) | |
| 640 { | |
| 641 cpp_forall_identifiers (pfile, undefine_macros, NULL); | |
| 642 } | |
| 643 | |
| 644 | |
| 645 /* Helper routine used by parse_include. Reinterpret the current line | |
| 646 as an h-char-sequence (< ... >); we are looking at the first token | |
| 647 after the <. Returns a malloced filename. */ | |
| 648 static char * | |
| 649 glue_header_name (cpp_reader *pfile) | |
| 650 { | |
| 651 const cpp_token *token; | |
| 652 char *buffer; | |
| 653 size_t len, total_len = 0, capacity = 1024; | |
| 654 | |
| 655 /* To avoid lexed tokens overwriting our glued name, we can only | |
| 656 allocate from the string pool once we've lexed everything. */ | |
| 657 buffer = XNEWVEC (char, capacity); | |
| 658 for (;;) | |
| 659 { | |
| 660 token = get_token_no_padding (pfile); | |
| 661 | |
| 662 if (token->type == CPP_GREATER) | |
| 663 break; | |
| 664 if (token->type == CPP_EOF) | |
| 665 { | |
| 666 cpp_error (pfile, CPP_DL_ERROR, "missing terminating > character"); | |
| 667 break; | |
| 668 } | |
| 669 | |
| 670 len = cpp_token_len (token) + 2; /* Leading space, terminating \0. */ | |
| 671 if (total_len + len > capacity) | |
| 672 { | |
| 673 capacity = (capacity + len) * 2; | |
| 674 buffer = XRESIZEVEC (char, buffer, capacity); | |
| 675 } | |
| 676 | |
| 677 if (token->flags & PREV_WHITE) | |
| 678 buffer[total_len++] = ' '; | |
| 679 | |
| 680 total_len = (cpp_spell_token (pfile, token, (uchar *) &buffer[total_len], | |
| 681 true) | |
| 682 - (uchar *) buffer); | |
| 683 } | |
| 684 | |
| 685 buffer[total_len] = '\0'; | |
| 686 return buffer; | |
| 687 } | |
| 688 | |
| 689 /* Returns the file name of #include, #include_next, #import and | |
| 690 #pragma dependency. The string is malloced and the caller should | |
|
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691 free it. Returns NULL on error. LOCATION is the source location |
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692 of the file name. */ |
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693 |
| 0 | 694 static const char * |
| 695 parse_include (cpp_reader *pfile, int *pangle_brackets, | |
|
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696 const cpp_token ***buf, source_location *location) |
| 0 | 697 { |
| 698 char *fname; | |
| 699 const cpp_token *header; | |
| 700 | |
| 701 /* Allow macro expansion. */ | |
| 702 header = get_token_no_padding (pfile); | |
|
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703 *location = header->src_loc; |
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704 if ((header->type == CPP_STRING && header->val.str.text[0] != 'R') |
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705 || header->type == CPP_HEADER_NAME) |
| 0 | 706 { |
| 707 fname = XNEWVEC (char, header->val.str.len - 1); | |
| 708 memcpy (fname, header->val.str.text + 1, header->val.str.len - 2); | |
| 709 fname[header->val.str.len - 2] = '\0'; | |
| 710 *pangle_brackets = header->type == CPP_HEADER_NAME; | |
| 711 } | |
| 712 else if (header->type == CPP_LESS) | |
| 713 { | |
| 714 fname = glue_header_name (pfile); | |
| 715 *pangle_brackets = 1; | |
| 716 } | |
| 717 else | |
| 718 { | |
| 719 const unsigned char *dir; | |
| 720 | |
| 721 if (pfile->directive == &dtable[T_PRAGMA]) | |
| 722 dir = UC"pragma dependency"; | |
| 723 else | |
| 724 dir = pfile->directive->name; | |
| 725 cpp_error (pfile, CPP_DL_ERROR, "#%s expects \"FILENAME\" or <FILENAME>", | |
| 726 dir); | |
| 727 | |
| 728 return NULL; | |
| 729 } | |
| 730 | |
| 731 if (pfile->directive == &dtable[T_PRAGMA]) | |
| 732 { | |
| 733 /* This pragma allows extra tokens after the file name. */ | |
| 734 } | |
| 735 else if (buf == NULL || CPP_OPTION (pfile, discard_comments)) | |
|
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736 check_eol (pfile, true); |
| 0 | 737 else |
| 738 { | |
| 739 /* If we are not discarding comments, then gather them while | |
| 740 doing the eol check. */ | |
| 741 *buf = check_eol_return_comments (pfile); | |
| 742 } | |
| 743 | |
| 744 return fname; | |
| 745 } | |
| 746 | |
| 747 /* Handle #include, #include_next and #import. */ | |
| 748 static void | |
| 749 do_include_common (cpp_reader *pfile, enum include_type type) | |
| 750 { | |
| 751 const char *fname; | |
| 752 int angle_brackets; | |
| 753 const cpp_token **buf = NULL; | |
|
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754 source_location location; |
| 0 | 755 |
| 756 /* Re-enable saving of comments if requested, so that the include | |
| 757 callback can dump comments which follow #include. */ | |
| 758 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
| 759 | |
|
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760 fname = parse_include (pfile, &angle_brackets, &buf, &location); |
| 0 | 761 if (!fname) |
| 762 { | |
| 763 if (buf) | |
| 764 XDELETEVEC (buf); | |
| 765 return; | |
| 766 } | |
| 767 | |
| 768 if (!*fname) | |
| 769 { | |
|
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770 cpp_error_with_line (pfile, CPP_DL_ERROR, location, 0, |
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771 "empty filename in #%s", |
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772 pfile->directive->name); |
| 0 | 773 XDELETEVEC (fname); |
| 774 if (buf) | |
| 775 XDELETEVEC (buf); | |
| 776 return; | |
| 777 } | |
| 778 | |
| 779 /* Prevent #include recursion. */ | |
| 780 if (pfile->line_table->depth >= CPP_STACK_MAX) | |
| 781 cpp_error (pfile, CPP_DL_ERROR, "#include nested too deeply"); | |
| 782 else | |
| 783 { | |
| 784 /* Get out of macro context, if we are. */ | |
| 785 skip_rest_of_line (pfile); | |
| 786 | |
| 787 if (pfile->cb.include) | |
| 788 pfile->cb.include (pfile, pfile->directive_line, | |
| 789 pfile->directive->name, fname, angle_brackets, | |
| 790 buf); | |
| 791 | |
| 792 _cpp_stack_include (pfile, fname, angle_brackets, type); | |
| 793 } | |
| 794 | |
| 795 XDELETEVEC (fname); | |
| 796 if (buf) | |
| 797 XDELETEVEC (buf); | |
| 798 } | |
| 799 | |
| 800 static void | |
| 801 do_include (cpp_reader *pfile) | |
| 802 { | |
| 803 do_include_common (pfile, IT_INCLUDE); | |
| 804 } | |
| 805 | |
| 806 static void | |
| 807 do_import (cpp_reader *pfile) | |
| 808 { | |
| 809 do_include_common (pfile, IT_IMPORT); | |
| 810 } | |
| 811 | |
| 812 static void | |
| 813 do_include_next (cpp_reader *pfile) | |
| 814 { | |
| 815 enum include_type type = IT_INCLUDE_NEXT; | |
| 816 | |
| 817 /* If this is the primary source file, warn and use the normal | |
| 818 search logic. */ | |
| 819 if (cpp_in_primary_file (pfile)) | |
| 820 { | |
| 821 cpp_error (pfile, CPP_DL_WARNING, | |
| 822 "#include_next in primary source file"); | |
| 823 type = IT_INCLUDE; | |
| 824 } | |
| 825 do_include_common (pfile, type); | |
| 826 } | |
| 827 | |
| 828 /* Subroutine of do_linemarker. Read possible flags after file name. | |
| 829 LAST is the last flag seen; 0 if this is the first flag. Return the | |
| 830 flag if it is valid, 0 at the end of the directive. Otherwise | |
| 831 complain. */ | |
| 832 static unsigned int | |
| 833 read_flag (cpp_reader *pfile, unsigned int last) | |
| 834 { | |
| 835 const cpp_token *token = _cpp_lex_token (pfile); | |
| 836 | |
| 837 if (token->type == CPP_NUMBER && token->val.str.len == 1) | |
| 838 { | |
| 839 unsigned int flag = token->val.str.text[0] - '0'; | |
| 840 | |
| 841 if (flag > last && flag <= 4 | |
| 842 && (flag != 4 || last == 3) | |
| 843 && (flag != 2 || last == 0)) | |
| 844 return flag; | |
| 845 } | |
| 846 | |
| 847 if (token->type != CPP_EOF) | |
| 848 cpp_error (pfile, CPP_DL_ERROR, "invalid flag \"%s\" in line directive", | |
| 849 cpp_token_as_text (pfile, token)); | |
| 850 return 0; | |
| 851 } | |
| 852 | |
| 853 /* Subroutine of do_line and do_linemarker. Convert a number in STR, | |
| 854 of length LEN, to binary; store it in NUMP, and return false if the | |
| 855 number was well-formed, true if not. WRAPPED is set to true if the | |
| 856 number did not fit into 'unsigned long'. */ | |
| 857 static bool | |
| 858 strtolinenum (const uchar *str, size_t len, linenum_type *nump, bool *wrapped) | |
| 859 { | |
| 860 linenum_type reg = 0; | |
| 861 linenum_type reg_prev = 0; | |
| 862 | |
| 863 uchar c; | |
| 864 *wrapped = false; | |
| 865 while (len--) | |
| 866 { | |
| 867 c = *str++; | |
| 868 if (!ISDIGIT (c)) | |
| 869 return true; | |
| 870 reg *= 10; | |
| 871 reg += c - '0'; | |
| 872 if (reg < reg_prev) | |
| 873 *wrapped = true; | |
| 874 reg_prev = reg; | |
| 875 } | |
| 876 *nump = reg; | |
| 877 return false; | |
| 878 } | |
| 879 | |
| 880 /* Interpret #line command. | |
| 881 Note that the filename string (if any) is a true string constant | |
| 882 (escapes are interpreted), unlike in #line. */ | |
| 883 static void | |
| 884 do_line (cpp_reader *pfile) | |
| 885 { | |
| 886 const struct line_maps *line_table = pfile->line_table; | |
| 887 const struct line_map *map = &line_table->maps[line_table->used - 1]; | |
| 888 | |
| 889 /* skip_rest_of_line() may cause line table to be realloc()ed so note down | |
| 890 sysp right now. */ | |
| 891 | |
| 892 unsigned char map_sysp = map->sysp; | |
| 893 const cpp_token *token; | |
| 894 const char *new_file = map->to_file; | |
| 895 linenum_type new_lineno; | |
| 896 | |
| 897 /* C99 raised the minimum limit on #line numbers. */ | |
| 898 linenum_type cap = CPP_OPTION (pfile, c99) ? 2147483647 : 32767; | |
| 899 bool wrapped; | |
| 900 | |
| 901 /* #line commands expand macros. */ | |
| 902 token = cpp_get_token (pfile); | |
| 903 if (token->type != CPP_NUMBER | |
| 904 || strtolinenum (token->val.str.text, token->val.str.len, | |
| 905 &new_lineno, &wrapped)) | |
| 906 { | |
| 907 if (token->type == CPP_EOF) | |
| 908 cpp_error (pfile, CPP_DL_ERROR, "unexpected end of file after #line"); | |
| 909 else | |
| 910 cpp_error (pfile, CPP_DL_ERROR, | |
| 911 "\"%s\" after #line is not a positive integer", | |
| 912 cpp_token_as_text (pfile, token)); | |
| 913 return; | |
| 914 } | |
| 915 | |
| 916 if (CPP_PEDANTIC (pfile) && (new_lineno == 0 || new_lineno > cap || wrapped)) | |
| 917 cpp_error (pfile, CPP_DL_PEDWARN, "line number out of range"); | |
| 918 else if (wrapped) | |
| 919 cpp_error (pfile, CPP_DL_WARNING, "line number out of range"); | |
| 920 | |
| 921 token = cpp_get_token (pfile); | |
| 922 if (token->type == CPP_STRING) | |
| 923 { | |
| 924 cpp_string s = { 0, 0 }; | |
| 925 if (cpp_interpret_string_notranslate (pfile, &token->val.str, 1, | |
|
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926 &s, CPP_STRING)) |
| 0 | 927 new_file = (const char *)s.text; |
|
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928 check_eol (pfile, true); |
| 0 | 929 } |
| 930 else if (token->type != CPP_EOF) | |
| 931 { | |
| 932 cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", | |
| 933 cpp_token_as_text (pfile, token)); | |
| 934 return; | |
| 935 } | |
| 936 | |
| 937 skip_rest_of_line (pfile); | |
|
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938 _cpp_do_file_change (pfile, LC_RENAME_VERBATIM, new_file, new_lineno, |
| 0 | 939 map_sysp); |
| 940 } | |
| 941 | |
| 942 /* Interpret the # 44 "file" [flags] notation, which has slightly | |
| 943 different syntax and semantics from #line: Flags are allowed, | |
| 944 and we never complain about the line number being too big. */ | |
| 945 static void | |
| 946 do_linemarker (cpp_reader *pfile) | |
| 947 { | |
| 948 const struct line_maps *line_table = pfile->line_table; | |
| 949 const struct line_map *map = &line_table->maps[line_table->used - 1]; | |
| 950 const cpp_token *token; | |
| 951 const char *new_file = map->to_file; | |
| 952 linenum_type new_lineno; | |
| 953 unsigned int new_sysp = map->sysp; | |
|
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954 enum lc_reason reason = LC_RENAME_VERBATIM; |
| 0 | 955 int flag; |
| 956 bool wrapped; | |
| 957 | |
| 958 /* Back up so we can get the number again. Putting this in | |
| 959 _cpp_handle_directive risks two calls to _cpp_backup_tokens in | |
| 960 some circumstances, which can segfault. */ | |
| 961 _cpp_backup_tokens (pfile, 1); | |
| 962 | |
| 963 /* #line commands expand macros. */ | |
| 964 token = cpp_get_token (pfile); | |
| 965 if (token->type != CPP_NUMBER | |
| 966 || strtolinenum (token->val.str.text, token->val.str.len, | |
| 967 &new_lineno, &wrapped)) | |
| 968 { | |
| 969 /* Unlike #line, there does not seem to be a way to get an EOF | |
| 970 here. So, it should be safe to always spell the token. */ | |
| 971 cpp_error (pfile, CPP_DL_ERROR, | |
| 972 "\"%s\" after # is not a positive integer", | |
| 973 cpp_token_as_text (pfile, token)); | |
| 974 return; | |
| 975 } | |
| 976 | |
| 977 token = cpp_get_token (pfile); | |
| 978 if (token->type == CPP_STRING) | |
| 979 { | |
| 980 cpp_string s = { 0, 0 }; | |
| 981 if (cpp_interpret_string_notranslate (pfile, &token->val.str, | |
|
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982 1, &s, CPP_STRING)) |
| 0 | 983 new_file = (const char *)s.text; |
| 984 | |
| 985 new_sysp = 0; | |
| 986 flag = read_flag (pfile, 0); | |
| 987 if (flag == 1) | |
| 988 { | |
| 989 reason = LC_ENTER; | |
| 990 /* Fake an include for cpp_included (). */ | |
| 991 _cpp_fake_include (pfile, new_file); | |
| 992 flag = read_flag (pfile, flag); | |
| 993 } | |
| 994 else if (flag == 2) | |
| 995 { | |
| 996 reason = LC_LEAVE; | |
| 997 flag = read_flag (pfile, flag); | |
| 998 } | |
| 999 if (flag == 3) | |
| 1000 { | |
| 1001 new_sysp = 1; | |
| 1002 flag = read_flag (pfile, flag); | |
| 1003 if (flag == 4) | |
| 1004 new_sysp = 2; | |
| 1005 } | |
| 1006 pfile->buffer->sysp = new_sysp; | |
| 1007 | |
|
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1008 check_eol (pfile, false); |
| 0 | 1009 } |
| 1010 else if (token->type != CPP_EOF) | |
| 1011 { | |
| 1012 cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", | |
| 1013 cpp_token_as_text (pfile, token)); | |
| 1014 return; | |
| 1015 } | |
| 1016 | |
| 1017 skip_rest_of_line (pfile); | |
|
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1018 |
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1019 /* Compensate for the increment in linemap_add that occurs in |
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1020 _cpp_do_file_change. We're currently at the start of the line |
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1021 *following* the #line directive. A separate source_location for this |
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1022 location makes no sense (until we do the LC_LEAVE), and |
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1023 complicates LAST_SOURCE_LINE_LOCATION. */ |
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1024 pfile->line_table->highest_location--; |
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1025 |
| 0 | 1026 _cpp_do_file_change (pfile, reason, new_file, new_lineno, new_sysp); |
| 1027 } | |
| 1028 | |
| 1029 /* Arrange the file_change callback. pfile->line has changed to | |
| 1030 FILE_LINE of TO_FILE, for reason REASON. SYSP is 1 for a system | |
| 1031 header, 2 for a system header that needs to be extern "C" protected, | |
| 1032 and zero otherwise. */ | |
| 1033 void | |
| 1034 _cpp_do_file_change (cpp_reader *pfile, enum lc_reason reason, | |
| 1035 const char *to_file, linenum_type file_line, | |
| 1036 unsigned int sysp) | |
| 1037 { | |
| 1038 const struct line_map *map = linemap_add (pfile->line_table, reason, sysp, | |
| 1039 to_file, file_line); | |
| 1040 if (map != NULL) | |
| 1041 linemap_line_start (pfile->line_table, map->to_line, 127); | |
| 1042 | |
| 1043 if (pfile->cb.file_change) | |
| 1044 pfile->cb.file_change (pfile, map); | |
| 1045 } | |
| 1046 | |
| 1047 /* Report a warning or error detected by the program we are | |
| 1048 processing. Use the directive's tokens in the error message. */ | |
| 1049 static void | |
|
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1050 do_diagnostic (cpp_reader *pfile, int code, int reason, int print_dir) |
| 0 | 1051 { |
| 1052 const unsigned char *dir_name; | |
| 1053 unsigned char *line; | |
| 1054 source_location src_loc = pfile->cur_token[-1].src_loc; | |
| 1055 | |
| 1056 if (print_dir) | |
| 1057 dir_name = pfile->directive->name; | |
| 1058 else | |
| 1059 dir_name = NULL; | |
| 1060 pfile->state.prevent_expansion++; | |
| 1061 line = cpp_output_line_to_string (pfile, dir_name); | |
| 1062 pfile->state.prevent_expansion--; | |
| 1063 | |
|
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1064 if (code == CPP_DL_WARNING_SYSHDR && reason) |
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1065 cpp_warning_with_line_syshdr (pfile, reason, src_loc, 0, "%s", line); |
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1066 else if (code == CPP_DL_WARNING && reason) |
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1067 cpp_warning_with_line (pfile, reason, src_loc, 0, "%s", line); |
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1068 else |
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1069 cpp_error_with_line (pfile, code, src_loc, 0, "%s", line); |
| 0 | 1070 free (line); |
| 1071 } | |
| 1072 | |
| 1073 static void | |
| 1074 do_error (cpp_reader *pfile) | |
| 1075 { | |
|
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1076 do_diagnostic (pfile, CPP_DL_ERROR, 0, 1); |
| 0 | 1077 } |
| 1078 | |
| 1079 static void | |
| 1080 do_warning (cpp_reader *pfile) | |
| 1081 { | |
| 1082 /* We want #warning diagnostics to be emitted in system headers too. */ | |
|
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1083 do_diagnostic (pfile, CPP_DL_WARNING_SYSHDR, CPP_W_WARNING_DIRECTIVE, 1); |
| 0 | 1084 } |
| 1085 | |
| 1086 /* Report program identification. */ | |
| 1087 static void | |
| 1088 do_ident (cpp_reader *pfile) | |
| 1089 { | |
| 1090 const cpp_token *str = cpp_get_token (pfile); | |
| 1091 | |
| 1092 if (str->type != CPP_STRING) | |
| 1093 cpp_error (pfile, CPP_DL_ERROR, "invalid #%s directive", | |
| 1094 pfile->directive->name); | |
| 1095 else if (pfile->cb.ident) | |
| 1096 pfile->cb.ident (pfile, pfile->directive_line, &str->val.str); | |
| 1097 | |
|
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1098 check_eol (pfile, false); |
| 0 | 1099 } |
| 1100 | |
| 1101 /* Lookup a PRAGMA name in a singly-linked CHAIN. Returns the | |
| 1102 matching entry, or NULL if none is found. The returned entry could | |
| 1103 be the start of a namespace chain, or a pragma. */ | |
| 1104 static struct pragma_entry * | |
| 1105 lookup_pragma_entry (struct pragma_entry *chain, const cpp_hashnode *pragma) | |
| 1106 { | |
| 1107 while (chain && chain->pragma != pragma) | |
| 1108 chain = chain->next; | |
| 1109 | |
| 1110 return chain; | |
| 1111 } | |
| 1112 | |
| 1113 /* Create and insert a blank pragma entry at the beginning of a | |
| 1114 singly-linked CHAIN. */ | |
| 1115 static struct pragma_entry * | |
| 1116 new_pragma_entry (cpp_reader *pfile, struct pragma_entry **chain) | |
| 1117 { | |
| 1118 struct pragma_entry *new_entry; | |
| 1119 | |
| 1120 new_entry = (struct pragma_entry *) | |
| 1121 _cpp_aligned_alloc (pfile, sizeof (struct pragma_entry)); | |
| 1122 | |
| 1123 memset (new_entry, 0, sizeof (struct pragma_entry)); | |
| 1124 new_entry->next = *chain; | |
| 1125 | |
| 1126 *chain = new_entry; | |
| 1127 return new_entry; | |
| 1128 } | |
| 1129 | |
| 1130 /* Register a pragma NAME in namespace SPACE. If SPACE is null, it | |
| 1131 goes in the global namespace. */ | |
| 1132 static struct pragma_entry * | |
| 1133 register_pragma_1 (cpp_reader *pfile, const char *space, const char *name, | |
| 1134 bool allow_name_expansion) | |
| 1135 { | |
| 1136 struct pragma_entry **chain = &pfile->pragmas; | |
| 1137 struct pragma_entry *entry; | |
| 1138 const cpp_hashnode *node; | |
| 1139 | |
| 1140 if (space) | |
| 1141 { | |
| 1142 node = cpp_lookup (pfile, UC space, strlen (space)); | |
| 1143 entry = lookup_pragma_entry (*chain, node); | |
| 1144 if (!entry) | |
| 1145 { | |
| 1146 entry = new_pragma_entry (pfile, chain); | |
| 1147 entry->pragma = node; | |
| 1148 entry->is_nspace = true; | |
| 1149 entry->allow_expansion = allow_name_expansion; | |
| 1150 } | |
| 1151 else if (!entry->is_nspace) | |
| 1152 goto clash; | |
| 1153 else if (entry->allow_expansion != allow_name_expansion) | |
| 1154 { | |
| 1155 cpp_error (pfile, CPP_DL_ICE, | |
| 1156 "registering pragmas in namespace \"%s\" with mismatched " | |
| 1157 "name expansion", space); | |
| 1158 return NULL; | |
| 1159 } | |
| 1160 chain = &entry->u.space; | |
| 1161 } | |
| 1162 else if (allow_name_expansion) | |
| 1163 { | |
| 1164 cpp_error (pfile, CPP_DL_ICE, | |
| 1165 "registering pragma \"%s\" with name expansion " | |
| 1166 "and no namespace", name); | |
| 1167 return NULL; | |
| 1168 } | |
| 1169 | |
| 1170 /* Check for duplicates. */ | |
| 1171 node = cpp_lookup (pfile, UC name, strlen (name)); | |
| 1172 entry = lookup_pragma_entry (*chain, node); | |
| 1173 if (entry == NULL) | |
| 1174 { | |
| 1175 entry = new_pragma_entry (pfile, chain); | |
| 1176 entry->pragma = node; | |
| 1177 return entry; | |
| 1178 } | |
| 1179 | |
| 1180 if (entry->is_nspace) | |
| 1181 clash: | |
| 1182 cpp_error (pfile, CPP_DL_ICE, | |
| 1183 "registering \"%s\" as both a pragma and a pragma namespace", | |
| 1184 NODE_NAME (node)); | |
| 1185 else if (space) | |
| 1186 cpp_error (pfile, CPP_DL_ICE, "#pragma %s %s is already registered", | |
| 1187 space, name); | |
| 1188 else | |
| 1189 cpp_error (pfile, CPP_DL_ICE, "#pragma %s is already registered", name); | |
| 1190 | |
| 1191 return NULL; | |
| 1192 } | |
| 1193 | |
| 1194 /* Register a cpplib internal pragma SPACE NAME with HANDLER. */ | |
| 1195 static void | |
| 1196 register_pragma_internal (cpp_reader *pfile, const char *space, | |
| 1197 const char *name, pragma_cb handler) | |
| 1198 { | |
| 1199 struct pragma_entry *entry; | |
| 1200 | |
| 1201 entry = register_pragma_1 (pfile, space, name, false); | |
| 1202 entry->is_internal = true; | |
| 1203 entry->u.handler = handler; | |
| 1204 } | |
| 1205 | |
| 1206 /* Register a pragma NAME in namespace SPACE. If SPACE is null, it | |
| 1207 goes in the global namespace. HANDLER is the handler it will call, | |
| 1208 which must be non-NULL. If ALLOW_EXPANSION is set, allow macro | |
| 1209 expansion while parsing pragma NAME. This function is exported | |
| 1210 from libcpp. */ | |
| 1211 void | |
| 1212 cpp_register_pragma (cpp_reader *pfile, const char *space, const char *name, | |
| 1213 pragma_cb handler, bool allow_expansion) | |
| 1214 { | |
| 1215 struct pragma_entry *entry; | |
| 1216 | |
| 1217 if (!handler) | |
| 1218 { | |
| 1219 cpp_error (pfile, CPP_DL_ICE, "registering pragma with NULL handler"); | |
| 1220 return; | |
| 1221 } | |
| 1222 | |
| 1223 entry = register_pragma_1 (pfile, space, name, false); | |
| 1224 if (entry) | |
| 1225 { | |
| 1226 entry->allow_expansion = allow_expansion; | |
| 1227 entry->u.handler = handler; | |
| 1228 } | |
| 1229 } | |
| 1230 | |
| 1231 /* Similarly, but create mark the pragma for deferred processing. | |
| 1232 When found, a CPP_PRAGMA token will be insertted into the stream | |
| 1233 with IDENT in the token->u.pragma slot. */ | |
| 1234 void | |
| 1235 cpp_register_deferred_pragma (cpp_reader *pfile, const char *space, | |
| 1236 const char *name, unsigned int ident, | |
| 1237 bool allow_expansion, bool allow_name_expansion) | |
| 1238 { | |
| 1239 struct pragma_entry *entry; | |
| 1240 | |
| 1241 entry = register_pragma_1 (pfile, space, name, allow_name_expansion); | |
| 1242 if (entry) | |
| 1243 { | |
| 1244 entry->is_deferred = true; | |
| 1245 entry->allow_expansion = allow_expansion; | |
| 1246 entry->u.ident = ident; | |
| 1247 } | |
| 1248 } | |
| 1249 | |
| 1250 /* Register the pragmas the preprocessor itself handles. */ | |
| 1251 void | |
| 1252 _cpp_init_internal_pragmas (cpp_reader *pfile) | |
| 1253 { | |
| 1254 /* Pragmas in the global namespace. */ | |
| 1255 register_pragma_internal (pfile, 0, "once", do_pragma_once); | |
|
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parents:
0
diff
changeset
|
1256 register_pragma_internal (pfile, 0, "push_macro", do_pragma_push_macro); |
|
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
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|
1257 register_pragma_internal (pfile, 0, "pop_macro", do_pragma_pop_macro); |
| 0 | 1258 |
| 1259 /* New GCC-specific pragmas should be put in the GCC namespace. */ | |
| 1260 register_pragma_internal (pfile, "GCC", "poison", do_pragma_poison); | |
| 1261 register_pragma_internal (pfile, "GCC", "system_header", | |
| 1262 do_pragma_system_header); | |
| 1263 register_pragma_internal (pfile, "GCC", "dependency", do_pragma_dependency); | |
| 1264 } | |
| 1265 | |
| 1266 /* Return the number of registered pragmas in PE. */ | |
| 1267 | |
| 1268 static int | |
| 1269 count_registered_pragmas (struct pragma_entry *pe) | |
| 1270 { | |
| 1271 int ct = 0; | |
| 1272 for (; pe != NULL; pe = pe->next) | |
| 1273 { | |
| 1274 if (pe->is_nspace) | |
| 1275 ct += count_registered_pragmas (pe->u.space); | |
| 1276 ct++; | |
| 1277 } | |
| 1278 return ct; | |
| 1279 } | |
| 1280 | |
| 1281 /* Save into SD the names of the registered pragmas referenced by PE, | |
| 1282 and return a pointer to the next free space in SD. */ | |
| 1283 | |
| 1284 static char ** | |
| 1285 save_registered_pragmas (struct pragma_entry *pe, char **sd) | |
| 1286 { | |
| 1287 for (; pe != NULL; pe = pe->next) | |
| 1288 { | |
| 1289 if (pe->is_nspace) | |
| 1290 sd = save_registered_pragmas (pe->u.space, sd); | |
| 1291 *sd++ = (char *) xmemdup (HT_STR (&pe->pragma->ident), | |
| 1292 HT_LEN (&pe->pragma->ident), | |
| 1293 HT_LEN (&pe->pragma->ident) + 1); | |
| 1294 } | |
| 1295 return sd; | |
| 1296 } | |
| 1297 | |
| 1298 /* Return a newly-allocated array which saves the names of the | |
| 1299 registered pragmas. */ | |
| 1300 | |
| 1301 char ** | |
| 1302 _cpp_save_pragma_names (cpp_reader *pfile) | |
| 1303 { | |
| 1304 int ct = count_registered_pragmas (pfile->pragmas); | |
| 1305 char **result = XNEWVEC (char *, ct); | |
| 1306 (void) save_registered_pragmas (pfile->pragmas, result); | |
| 1307 return result; | |
| 1308 } | |
| 1309 | |
| 1310 /* Restore from SD the names of the registered pragmas referenced by PE, | |
| 1311 and return a pointer to the next unused name in SD. */ | |
| 1312 | |
| 1313 static char ** | |
| 1314 restore_registered_pragmas (cpp_reader *pfile, struct pragma_entry *pe, | |
| 1315 char **sd) | |
| 1316 { | |
| 1317 for (; pe != NULL; pe = pe->next) | |
| 1318 { | |
| 1319 if (pe->is_nspace) | |
| 1320 sd = restore_registered_pragmas (pfile, pe->u.space, sd); | |
| 1321 pe->pragma = cpp_lookup (pfile, UC *sd, strlen (*sd)); | |
| 1322 free (*sd); | |
| 1323 sd++; | |
| 1324 } | |
| 1325 return sd; | |
| 1326 } | |
| 1327 | |
| 1328 /* Restore the names of the registered pragmas from SAVED. */ | |
| 1329 | |
| 1330 void | |
| 1331 _cpp_restore_pragma_names (cpp_reader *pfile, char **saved) | |
| 1332 { | |
| 1333 (void) restore_registered_pragmas (pfile, pfile->pragmas, saved); | |
| 1334 free (saved); | |
| 1335 } | |
| 1336 | |
| 1337 /* Pragmata handling. We handle some, and pass the rest on to the | |
| 1338 front end. C99 defines three pragmas and says that no macro | |
| 1339 expansion is to be performed on them; whether or not macro | |
| 1340 expansion happens for other pragmas is implementation defined. | |
| 1341 This implementation allows for a mix of both, since GCC did not | |
| 1342 traditionally macro expand its (few) pragmas, whereas OpenMP | |
| 1343 specifies that macro expansion should happen. */ | |
| 1344 static void | |
| 1345 do_pragma (cpp_reader *pfile) | |
| 1346 { | |
| 1347 const struct pragma_entry *p = NULL; | |
| 1348 const cpp_token *token, *pragma_token = pfile->cur_token; | |
| 1349 cpp_token ns_token; | |
| 1350 unsigned int count = 1; | |
| 1351 | |
| 1352 pfile->state.prevent_expansion++; | |
| 1353 | |
| 1354 token = cpp_get_token (pfile); | |
| 1355 ns_token = *token; | |
| 1356 if (token->type == CPP_NAME) | |
| 1357 { | |
|
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diff
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|
1358 p = lookup_pragma_entry (pfile->pragmas, token->val.node.node); |
| 0 | 1359 if (p && p->is_nspace) |
| 1360 { | |
| 1361 bool allow_name_expansion = p->allow_expansion; | |
| 1362 if (allow_name_expansion) | |
| 1363 pfile->state.prevent_expansion--; | |
| 1364 token = cpp_get_token (pfile); | |
| 1365 if (token->type == CPP_NAME) | |
|
55
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diff
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|
1366 p = lookup_pragma_entry (p->u.space, token->val.node.node); |
| 0 | 1367 else |
| 1368 p = NULL; | |
| 1369 if (allow_name_expansion) | |
| 1370 pfile->state.prevent_expansion++; | |
| 1371 count = 2; | |
| 1372 } | |
| 1373 } | |
| 1374 | |
| 1375 if (p) | |
| 1376 { | |
| 1377 if (p->is_deferred) | |
| 1378 { | |
| 1379 pfile->directive_result.src_loc = pragma_token->src_loc; | |
| 1380 pfile->directive_result.type = CPP_PRAGMA; | |
| 1381 pfile->directive_result.flags = pragma_token->flags; | |
| 1382 pfile->directive_result.val.pragma = p->u.ident; | |
| 1383 pfile->state.in_deferred_pragma = true; | |
| 1384 pfile->state.pragma_allow_expansion = p->allow_expansion; | |
| 1385 if (!p->allow_expansion) | |
| 1386 pfile->state.prevent_expansion++; | |
| 1387 } | |
| 1388 else | |
| 1389 { | |
| 1390 /* Since the handler below doesn't get the line number, that | |
| 1391 it might need for diagnostics, make sure it has the right | |
| 1392 numbers in place. */ | |
| 1393 if (pfile->cb.line_change) | |
| 1394 (*pfile->cb.line_change) (pfile, pragma_token, false); | |
| 1395 if (p->allow_expansion) | |
| 1396 pfile->state.prevent_expansion--; | |
| 1397 (*p->u.handler) (pfile); | |
| 1398 if (p->allow_expansion) | |
| 1399 pfile->state.prevent_expansion++; | |
| 1400 } | |
| 1401 } | |
| 1402 else if (pfile->cb.def_pragma) | |
| 1403 { | |
| 1404 if (count == 1 || pfile->context->prev == NULL) | |
| 1405 _cpp_backup_tokens (pfile, count); | |
| 1406 else | |
| 1407 { | |
| 1408 /* Invalid name comes from macro expansion, _cpp_backup_tokens | |
| 1409 won't allow backing 2 tokens. */ | |
| 1410 /* ??? The token buffer is leaked. Perhaps if def_pragma hook | |
| 1411 reads both tokens, we could perhaps free it, but if it doesn't, | |
| 1412 we don't know the exact lifespan. */ | |
| 1413 cpp_token *toks = XNEWVEC (cpp_token, 2); | |
| 1414 toks[0] = ns_token; | |
| 1415 toks[0].flags |= NO_EXPAND; | |
| 1416 toks[1] = *token; | |
| 1417 toks[1].flags |= NO_EXPAND; | |
| 1418 _cpp_push_token_context (pfile, NULL, toks, 2); | |
| 1419 } | |
| 1420 pfile->cb.def_pragma (pfile, pfile->directive_line); | |
| 1421 } | |
| 1422 | |
| 1423 pfile->state.prevent_expansion--; | |
| 1424 } | |
| 1425 | |
| 1426 /* Handle #pragma once. */ | |
| 1427 static void | |
| 1428 do_pragma_once (cpp_reader *pfile) | |
| 1429 { | |
| 1430 if (cpp_in_primary_file (pfile)) | |
| 1431 cpp_error (pfile, CPP_DL_WARNING, "#pragma once in main file"); | |
| 1432 | |
|
55
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47
diff
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|
1433 check_eol (pfile, false); |
| 0 | 1434 _cpp_mark_file_once_only (pfile, pfile->buffer->file); |
| 1435 } | |
| 1436 | |
|
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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diff
changeset
|
1437 /* Handle #pragma push_macro(STRING). */ |
|
3bfb6c00c1e0
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diff
changeset
|
1438 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
|
1439 do_pragma_push_macro (cpp_reader *pfile) |
|
3bfb6c00c1e0
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parents:
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diff
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|
1440 { |
|
67
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|
1441 cpp_hashnode *node; |
|
f6334be47118
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|
1442 size_t defnlen; |
|
f6334be47118
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|
1443 const uchar *defn = NULL; |
|
47
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
|
1444 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
|
1445 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
|
1446 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
|
1447 struct def_pragma_macro *c; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
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parents:
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diff
changeset
|
1448 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1449 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
|
1450 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
|
1451 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1452 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
|
1453 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
|
1454 "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
|
1455 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
|
1456 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
|
1457 return; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1458 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1459 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
|
1460 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
|
1461 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
|
1462 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
|
1463 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1464 /* 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
|
1465 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
|
1466 src++; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1467 *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
|
1468 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1469 *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
|
1470 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
|
1471 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
|
1472 c = XNEW (struct def_pragma_macro); |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1473 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
|
1474 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
|
1475 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
|
1476 c->next = pfile->pushed_macros; |
|
67
f6334be47118
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63
diff
changeset
|
1477 node = _cpp_lex_identifier (pfile, c->name); |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1478 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
|
1479 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>
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63
diff
changeset
|
1480 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
|
1481 { |
|
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
|
1482 defn = cpp_macro_definition (pfile, node); |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1483 defnlen = ustrlen (defn); |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1484 c->definition = XNEWVEC (uchar, defnlen + 2); |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff
changeset
|
1485 c->definition[defnlen] = '\n'; |
|
f6334be47118
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63
diff
changeset
|
1486 c->definition[defnlen + 1] = 0; |
|
f6334be47118
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diff
changeset
|
1487 c->line = node->value.macro->line; |
|
f6334be47118
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63
diff
changeset
|
1488 c->syshdr = node->value.macro->syshdr; |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1489 c->used = node->value.macro->used; |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff
changeset
|
1490 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
|
1491 } |
|
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
|
1492 |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1493 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
|
1494 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1495 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1496 /* 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
|
1497 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
|
1498 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
|
1499 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1500 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
|
1501 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
|
1502 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
|
1503 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
|
1504 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
|
1505 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
|
1506 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1507 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
|
1508 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
|
1509 "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
|
1510 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
|
1511 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
|
1512 return; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1513 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1514 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
|
1515 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
|
1516 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
|
1517 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
|
1518 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1519 /* 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
|
1520 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
|
1521 src++; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1522 *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
|
1523 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1524 *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
|
1525 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
|
1526 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
|
1527 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1528 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
|
1529 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1530 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
|
1531 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1532 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
|
1533 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
|
1534 else |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1535 l->next = c->next; |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1536 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
|
1537 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
|
1538 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
|
1539 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
|
1540 break; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1541 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1542 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
|
1543 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
|
1544 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1545 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1546 |
| 0 | 1547 /* Handle #pragma GCC poison, to poison one or more identifiers so |
| 1548 that the lexer produces a hard error for each subsequent usage. */ | |
| 1549 static void | |
| 1550 do_pragma_poison (cpp_reader *pfile) | |
| 1551 { | |
| 1552 const cpp_token *tok; | |
| 1553 cpp_hashnode *hp; | |
| 1554 | |
| 1555 pfile->state.poisoned_ok = 1; | |
| 1556 for (;;) | |
| 1557 { | |
| 1558 tok = _cpp_lex_token (pfile); | |
| 1559 if (tok->type == CPP_EOF) | |
| 1560 break; | |
| 1561 if (tok->type != CPP_NAME) | |
| 1562 { | |
| 1563 cpp_error (pfile, CPP_DL_ERROR, | |
| 1564 "invalid #pragma GCC poison directive"); | |
| 1565 break; | |
| 1566 } | |
| 1567 | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1568 hp = tok->val.node.node; |
| 0 | 1569 if (hp->flags & NODE_POISONED) |
| 1570 continue; | |
| 1571 | |
| 1572 if (hp->type == NT_MACRO) | |
| 1573 cpp_error (pfile, CPP_DL_WARNING, "poisoning existing macro \"%s\"", | |
| 1574 NODE_NAME (hp)); | |
| 1575 _cpp_free_definition (hp); | |
| 1576 hp->flags |= NODE_POISONED | NODE_DIAGNOSTIC; | |
| 1577 } | |
| 1578 pfile->state.poisoned_ok = 0; | |
| 1579 } | |
| 1580 | |
| 1581 /* Mark the current header as a system header. This will suppress | |
| 1582 some categories of warnings (notably those from -pedantic). It is | |
| 1583 intended for use in system libraries that cannot be implemented in | |
| 1584 conforming C, but cannot be certain that their headers appear in a | |
| 1585 system include directory. To prevent abuse, it is rejected in the | |
| 1586 primary source file. */ | |
| 1587 static void | |
| 1588 do_pragma_system_header (cpp_reader *pfile) | |
| 1589 { | |
| 1590 if (cpp_in_primary_file (pfile)) | |
| 1591 cpp_error (pfile, CPP_DL_WARNING, | |
| 1592 "#pragma system_header ignored outside include file"); | |
| 1593 else | |
| 1594 { | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1595 check_eol (pfile, false); |
| 0 | 1596 skip_rest_of_line (pfile); |
| 1597 cpp_make_system_header (pfile, 1, 0); | |
| 1598 } | |
| 1599 } | |
| 1600 | |
| 1601 /* Check the modified date of the current include file against a specified | |
| 1602 file. Issue a diagnostic, if the specified file is newer. We use this to | |
| 1603 determine if a fixed header should be refixed. */ | |
| 1604 static void | |
| 1605 do_pragma_dependency (cpp_reader *pfile) | |
| 1606 { | |
| 1607 const char *fname; | |
| 1608 int angle_brackets, ordering; | |
|
55
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update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1609 source_location location; |
| 0 | 1610 |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1611 fname = parse_include (pfile, &angle_brackets, NULL, &location); |
| 0 | 1612 if (!fname) |
| 1613 return; | |
| 1614 | |
| 1615 ordering = _cpp_compare_file_date (pfile, fname, angle_brackets); | |
| 1616 if (ordering < 0) | |
| 1617 cpp_error (pfile, CPP_DL_WARNING, "cannot find source file %s", fname); | |
| 1618 else if (ordering > 0) | |
| 1619 { | |
| 1620 cpp_error (pfile, CPP_DL_WARNING, | |
| 1621 "current file is older than %s", fname); | |
| 1622 if (cpp_get_token (pfile)->type != CPP_EOF) | |
| 1623 { | |
| 1624 _cpp_backup_tokens (pfile, 1); | |
|
63
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
1625 do_diagnostic (pfile, CPP_DL_WARNING, 0, 0); |
| 0 | 1626 } |
| 1627 } | |
| 1628 | |
| 1629 free ((void *) fname); | |
| 1630 } | |
| 1631 | |
| 1632 /* Get a token but skip padding. */ | |
| 1633 static const cpp_token * | |
| 1634 get_token_no_padding (cpp_reader *pfile) | |
| 1635 { | |
| 1636 for (;;) | |
| 1637 { | |
| 1638 const cpp_token *result = cpp_get_token (pfile); | |
| 1639 if (result->type != CPP_PADDING) | |
| 1640 return result; | |
| 1641 } | |
| 1642 } | |
| 1643 | |
| 1644 /* Check syntax is "(string-literal)". Returns the string on success, | |
| 1645 or NULL on failure. */ | |
| 1646 static const cpp_token * | |
| 1647 get__Pragma_string (cpp_reader *pfile) | |
| 1648 { | |
| 1649 const cpp_token *string; | |
| 1650 const cpp_token *paren; | |
| 1651 | |
| 1652 paren = get_token_no_padding (pfile); | |
| 1653 if (paren->type == CPP_EOF) | |
| 1654 _cpp_backup_tokens (pfile, 1); | |
| 1655 if (paren->type != CPP_OPEN_PAREN) | |
| 1656 return NULL; | |
| 1657 | |
| 1658 string = get_token_no_padding (pfile); | |
| 1659 if (string->type == CPP_EOF) | |
| 1660 _cpp_backup_tokens (pfile, 1); | |
| 1661 if (string->type != CPP_STRING && string->type != CPP_WSTRING | |
|
55
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1662 && string->type != CPP_STRING32 && string->type != CPP_STRING16 |
|
77e2b8dfacca
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parents:
47
diff
changeset
|
1663 && string->type != CPP_UTF8STRING) |
| 0 | 1664 return NULL; |
| 1665 | |
| 1666 paren = get_token_no_padding (pfile); | |
| 1667 if (paren->type == CPP_EOF) | |
| 1668 _cpp_backup_tokens (pfile, 1); | |
| 1669 if (paren->type != CPP_CLOSE_PAREN) | |
| 1670 return NULL; | |
| 1671 | |
| 1672 return string; | |
| 1673 } | |
| 1674 | |
| 1675 /* Destringize IN into a temporary buffer, by removing the first \ of | |
| 1676 \" and \\ sequences, and process the result as a #pragma directive. */ | |
| 1677 static void | |
| 1678 destringize_and_run (cpp_reader *pfile, const cpp_string *in) | |
| 1679 { | |
| 1680 const unsigned char *src, *limit; | |
| 1681 char *dest, *result; | |
| 1682 cpp_context *saved_context; | |
| 1683 cpp_token *saved_cur_token; | |
| 1684 tokenrun *saved_cur_run; | |
| 1685 cpp_token *toks; | |
| 1686 int count; | |
| 1687 const struct directive *save_directive; | |
| 1688 | |
| 1689 dest = result = (char *) alloca (in->len - 1); | |
| 1690 src = in->text + 1 + (in->text[0] == 'L'); | |
| 1691 limit = in->text + in->len - 1; | |
| 1692 while (src < limit) | |
| 1693 { | |
| 1694 /* We know there is a character following the backslash. */ | |
| 1695 if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
| 1696 src++; | |
| 1697 *dest++ = *src++; | |
| 1698 } | |
| 1699 *dest = '\n'; | |
| 1700 | |
| 1701 /* Ugh; an awful kludge. We are really not set up to be lexing | |
| 1702 tokens when in the middle of a macro expansion. Use a new | |
| 1703 context to force cpp_get_token to lex, and so skip_rest_of_line | |
| 1704 doesn't go beyond the end of the text. Also, remember the | |
| 1705 current lexing position so we can return to it later. | |
| 1706 | |
| 1707 Something like line-at-a-time lexing should remove the need for | |
| 1708 this. */ | |
| 1709 saved_context = pfile->context; | |
| 1710 saved_cur_token = pfile->cur_token; | |
| 1711 saved_cur_run = pfile->cur_run; | |
| 1712 | |
| 1713 pfile->context = XNEW (cpp_context); | |
| 1714 pfile->context->macro = 0; | |
| 1715 pfile->context->prev = 0; | |
| 1716 pfile->context->next = 0; | |
| 1717 | |
| 1718 /* Inline run_directive, since we need to delay the _cpp_pop_buffer | |
| 1719 until we've read all of the tokens that we want. */ | |
| 1720 cpp_push_buffer (pfile, (const uchar *) result, dest - result, | |
| 1721 /* from_stage3 */ true); | |
| 1722 /* ??? Antique Disgusting Hack. What does this do? */ | |
| 1723 if (pfile->buffer->prev) | |
| 1724 pfile->buffer->file = pfile->buffer->prev->file; | |
| 1725 | |
| 1726 start_directive (pfile); | |
| 1727 _cpp_clean_line (pfile); | |
| 1728 save_directive = pfile->directive; | |
| 1729 pfile->directive = &dtable[T_PRAGMA]; | |
| 1730 do_pragma (pfile); | |
| 1731 end_directive (pfile, 1); | |
| 1732 pfile->directive = save_directive; | |
| 1733 | |
| 1734 /* We always insert at least one token, the directive result. It'll | |
| 1735 either be a CPP_PADDING or a CPP_PRAGMA. In the later case, we | |
| 1736 need to insert *all* of the tokens, including the CPP_PRAGMA_EOL. */ | |
| 1737 | |
| 1738 /* If we're not handling the pragma internally, read all of the tokens from | |
| 1739 the string buffer now, while the string buffer is still installed. */ | |
| 1740 /* ??? Note that the token buffer allocated here is leaked. It's not clear | |
| 1741 to me what the true lifespan of the tokens are. It would appear that | |
| 1742 the lifespan is the entire parse of the main input stream, in which case | |
| 1743 this may not be wrong. */ | |
| 1744 if (pfile->directive_result.type == CPP_PRAGMA) | |
| 1745 { | |
| 1746 int maxcount; | |
| 1747 | |
| 1748 count = 1; | |
| 1749 maxcount = 50; | |
| 1750 toks = XNEWVEC (cpp_token, maxcount); | |
| 1751 toks[0] = pfile->directive_result; | |
| 1752 | |
| 1753 do | |
| 1754 { | |
| 1755 if (count == maxcount) | |
| 1756 { | |
| 1757 maxcount = maxcount * 3 / 2; | |
| 1758 toks = XRESIZEVEC (cpp_token, toks, maxcount); | |
| 1759 } | |
| 1760 toks[count] = *cpp_get_token (pfile); | |
| 1761 /* Macros have been already expanded by cpp_get_token | |
| 1762 if the pragma allowed expansion. */ | |
| 1763 toks[count++].flags |= NO_EXPAND; | |
| 1764 } | |
| 1765 while (toks[count-1].type != CPP_PRAGMA_EOL); | |
| 1766 } | |
| 1767 else | |
| 1768 { | |
| 1769 count = 1; | |
| 1770 toks = XNEW (cpp_token); | |
| 1771 toks[0] = pfile->directive_result; | |
| 1772 | |
| 1773 /* If we handled the entire pragma internally, make sure we get the | |
| 1774 line number correct for the next token. */ | |
| 1775 if (pfile->cb.line_change) | |
| 1776 pfile->cb.line_change (pfile, pfile->cur_token, false); | |
| 1777 } | |
| 1778 | |
| 1779 /* Finish inlining run_directive. */ | |
| 1780 pfile->buffer->file = NULL; | |
| 1781 _cpp_pop_buffer (pfile); | |
| 1782 | |
| 1783 /* Reset the old macro state before ... */ | |
| 1784 XDELETE (pfile->context); | |
| 1785 pfile->context = saved_context; | |
| 1786 pfile->cur_token = saved_cur_token; | |
| 1787 pfile->cur_run = saved_cur_run; | |
| 1788 | |
| 1789 /* ... inserting the new tokens we collected. */ | |
| 1790 _cpp_push_token_context (pfile, NULL, toks, count); | |
| 1791 } | |
| 1792 | |
| 1793 /* Handle the _Pragma operator. Return 0 on error, 1 if ok. */ | |
| 1794 int | |
| 1795 _cpp_do__Pragma (cpp_reader *pfile) | |
| 1796 { | |
| 1797 const cpp_token *string = get__Pragma_string (pfile); | |
| 1798 pfile->directive_result.type = CPP_PADDING; | |
| 1799 | |
| 1800 if (string) | |
| 1801 { | |
| 1802 destringize_and_run (pfile, &string->val.str); | |
| 1803 return 1; | |
| 1804 } | |
| 1805 cpp_error (pfile, CPP_DL_ERROR, | |
| 1806 "_Pragma takes a parenthesized string literal"); | |
| 1807 return 0; | |
| 1808 } | |
| 1809 | |
| 1810 /* Handle #ifdef. */ | |
| 1811 static void | |
| 1812 do_ifdef (cpp_reader *pfile) | |
| 1813 { | |
| 1814 int skip = 1; | |
| 1815 | |
| 1816 if (! pfile->state.skipping) | |
| 1817 { | |
| 1818 cpp_hashnode *node = lex_macro_node (pfile, false); | |
| 1819 | |
| 1820 if (node) | |
| 1821 { | |
| 1822 skip = node->type != NT_MACRO; | |
| 1823 _cpp_mark_macro_used (node); | |
| 1824 if (!(node->flags & NODE_USED)) | |
| 1825 { | |
| 1826 node->flags |= NODE_USED; | |
| 1827 if (node->type == NT_MACRO) | |
| 1828 { | |
|
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1829 if ((node->flags & NODE_BUILTIN) |
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1830 && pfile->cb.user_builtin_macro) |
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1831 pfile->cb.user_builtin_macro (pfile, node); |
| 0 | 1832 if (pfile->cb.used_define) |
| 1833 pfile->cb.used_define (pfile, pfile->directive_line, node); | |
| 1834 } | |
| 1835 else | |
| 1836 { | |
| 1837 if (pfile->cb.used_undef) | |
| 1838 pfile->cb.used_undef (pfile, pfile->directive_line, node); | |
| 1839 } | |
| 1840 } | |
|
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1841 if (pfile->cb.used) |
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1842 pfile->cb.used (pfile, pfile->directive_line, node); |
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1843 check_eol (pfile, false); |
| 0 | 1844 } |
| 1845 } | |
| 1846 | |
| 1847 push_conditional (pfile, skip, T_IFDEF, 0); | |
| 1848 } | |
| 1849 | |
| 1850 /* Handle #ifndef. */ | |
| 1851 static void | |
| 1852 do_ifndef (cpp_reader *pfile) | |
| 1853 { | |
| 1854 int skip = 1; | |
| 1855 cpp_hashnode *node = 0; | |
| 1856 | |
| 1857 if (! pfile->state.skipping) | |
| 1858 { | |
| 1859 node = lex_macro_node (pfile, false); | |
| 1860 | |
| 1861 if (node) | |
| 1862 { | |
| 1863 skip = node->type == NT_MACRO; | |
| 1864 _cpp_mark_macro_used (node); | |
| 1865 if (!(node->flags & NODE_USED)) | |
| 1866 { | |
| 1867 node->flags |= NODE_USED; | |
| 1868 if (node->type == NT_MACRO) | |
| 1869 { | |
|
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1870 if ((node->flags & NODE_BUILTIN) |
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1871 && pfile->cb.user_builtin_macro) |
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1872 pfile->cb.user_builtin_macro (pfile, node); |
| 0 | 1873 if (pfile->cb.used_define) |
| 1874 pfile->cb.used_define (pfile, pfile->directive_line, node); | |
| 1875 } | |
| 1876 else | |
| 1877 { | |
| 1878 if (pfile->cb.used_undef) | |
| 1879 pfile->cb.used_undef (pfile, pfile->directive_line, node); | |
| 1880 } | |
| 1881 } | |
|
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1882 if (pfile->cb.used) |
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1883 pfile->cb.used (pfile, pfile->directive_line, node); |
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1884 check_eol (pfile, false); |
| 0 | 1885 } |
| 1886 } | |
| 1887 | |
| 1888 push_conditional (pfile, skip, T_IFNDEF, node); | |
| 1889 } | |
| 1890 | |
| 1891 /* _cpp_parse_expr puts a macro in a "#if !defined ()" expression in | |
| 1892 pfile->mi_ind_cmacro so we can handle multiple-include | |
| 1893 optimizations. If macro expansion occurs in the expression, we | |
| 1894 cannot treat it as a controlling conditional, since the expansion | |
| 1895 could change in the future. That is handled by cpp_get_token. */ | |
| 1896 static void | |
| 1897 do_if (cpp_reader *pfile) | |
| 1898 { | |
| 1899 int skip = 1; | |
| 1900 | |
| 1901 if (! pfile->state.skipping) | |
| 1902 skip = _cpp_parse_expr (pfile, true) == false; | |
| 1903 | |
| 1904 push_conditional (pfile, skip, T_IF, pfile->mi_ind_cmacro); | |
| 1905 } | |
| 1906 | |
| 1907 /* Flip skipping state if appropriate and continue without changing | |
| 1908 if_stack; this is so that the error message for missing #endif's | |
| 1909 etc. will point to the original #if. */ | |
| 1910 static void | |
| 1911 do_else (cpp_reader *pfile) | |
| 1912 { | |
| 1913 cpp_buffer *buffer = pfile->buffer; | |
| 1914 struct if_stack *ifs = buffer->if_stack; | |
| 1915 | |
| 1916 if (ifs == NULL) | |
| 1917 cpp_error (pfile, CPP_DL_ERROR, "#else without #if"); | |
| 1918 else | |
| 1919 { | |
| 1920 if (ifs->type == T_ELSE) | |
| 1921 { | |
| 1922 cpp_error (pfile, CPP_DL_ERROR, "#else after #else"); | |
| 1923 cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
| 1924 "the conditional began here"); | |
| 1925 } | |
| 1926 ifs->type = T_ELSE; | |
| 1927 | |
| 1928 /* Skip any future (erroneous) #elses or #elifs. */ | |
| 1929 pfile->state.skipping = ifs->skip_elses; | |
| 1930 ifs->skip_elses = true; | |
| 1931 | |
| 1932 /* Invalidate any controlling macro. */ | |
| 1933 ifs->mi_cmacro = 0; | |
| 1934 | |
| 1935 /* Only check EOL if was not originally skipping. */ | |
| 1936 if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) | |
|
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1937 check_eol (pfile, false); |
| 0 | 1938 } |
| 1939 } | |
| 1940 | |
| 1941 /* Handle a #elif directive by not changing if_stack either. See the | |
| 1942 comment above do_else. */ | |
| 1943 static void | |
| 1944 do_elif (cpp_reader *pfile) | |
| 1945 { | |
| 1946 cpp_buffer *buffer = pfile->buffer; | |
| 1947 struct if_stack *ifs = buffer->if_stack; | |
| 1948 | |
| 1949 if (ifs == NULL) | |
| 1950 cpp_error (pfile, CPP_DL_ERROR, "#elif without #if"); | |
| 1951 else | |
| 1952 { | |
| 1953 if (ifs->type == T_ELSE) | |
| 1954 { | |
| 1955 cpp_error (pfile, CPP_DL_ERROR, "#elif after #else"); | |
| 1956 cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
| 1957 "the conditional began here"); | |
| 1958 } | |
| 1959 ifs->type = T_ELIF; | |
| 1960 | |
| 1961 if (! ifs->was_skipping) | |
| 1962 { | |
| 1963 bool value; | |
| 1964 /* The standard mandates that the expression be parsed even | |
| 1965 if we are skipping elses at this point -- the lexical | |
| 1966 restrictions on #elif only apply to skipped groups, but | |
| 1967 this group is not being skipped. Temporarily set | |
| 1968 skipping to false to get lexer warnings. */ | |
| 1969 pfile->state.skipping = 0; | |
| 1970 value = _cpp_parse_expr (pfile, false); | |
| 1971 if (ifs->skip_elses) | |
| 1972 pfile->state.skipping = 1; | |
| 1973 else | |
| 1974 { | |
| 1975 pfile->state.skipping = ! value; | |
| 1976 ifs->skip_elses = value; | |
| 1977 } | |
| 1978 } | |
| 1979 | |
| 1980 /* Invalidate any controlling macro. */ | |
| 1981 ifs->mi_cmacro = 0; | |
| 1982 } | |
| 1983 } | |
| 1984 | |
| 1985 /* #endif pops the if stack and resets pfile->state.skipping. */ | |
| 1986 static void | |
| 1987 do_endif (cpp_reader *pfile) | |
| 1988 { | |
| 1989 cpp_buffer *buffer = pfile->buffer; | |
| 1990 struct if_stack *ifs = buffer->if_stack; | |
| 1991 | |
| 1992 if (ifs == NULL) | |
| 1993 cpp_error (pfile, CPP_DL_ERROR, "#endif without #if"); | |
| 1994 else | |
| 1995 { | |
| 1996 /* Only check EOL if was not originally skipping. */ | |
| 1997 if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) | |
|
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1998 check_eol (pfile, false); |
| 0 | 1999 |
| 2000 /* If potential control macro, we go back outside again. */ | |
| 2001 if (ifs->next == 0 && ifs->mi_cmacro) | |
| 2002 { | |
| 2003 pfile->mi_valid = true; | |
| 2004 pfile->mi_cmacro = ifs->mi_cmacro; | |
| 2005 } | |
| 2006 | |
| 2007 buffer->if_stack = ifs->next; | |
| 2008 pfile->state.skipping = ifs->was_skipping; | |
| 2009 obstack_free (&pfile->buffer_ob, ifs); | |
| 2010 } | |
| 2011 } | |
| 2012 | |
| 2013 /* Push an if_stack entry for a preprocessor conditional, and set | |
| 2014 pfile->state.skipping to SKIP. If TYPE indicates the conditional | |
| 2015 is #if or #ifndef, CMACRO is a potentially controlling macro, and | |
| 2016 we need to check here that we are at the top of the file. */ | |
| 2017 static void | |
| 2018 push_conditional (cpp_reader *pfile, int skip, int type, | |
| 2019 const cpp_hashnode *cmacro) | |
| 2020 { | |
| 2021 struct if_stack *ifs; | |
| 2022 cpp_buffer *buffer = pfile->buffer; | |
| 2023 | |
| 2024 ifs = XOBNEW (&pfile->buffer_ob, struct if_stack); | |
| 2025 ifs->line = pfile->directive_line; | |
| 2026 ifs->next = buffer->if_stack; | |
| 2027 ifs->skip_elses = pfile->state.skipping || !skip; | |
| 2028 ifs->was_skipping = pfile->state.skipping; | |
| 2029 ifs->type = type; | |
| 2030 /* This condition is effectively a test for top-of-file. */ | |
| 2031 if (pfile->mi_valid && pfile->mi_cmacro == 0) | |
| 2032 ifs->mi_cmacro = cmacro; | |
| 2033 else | |
| 2034 ifs->mi_cmacro = 0; | |
| 2035 | |
| 2036 pfile->state.skipping = skip; | |
| 2037 buffer->if_stack = ifs; | |
| 2038 } | |
| 2039 | |
| 2040 /* Read the tokens of the answer into the macro pool, in a directive | |
| 2041 of type TYPE. Only commit the memory if we intend it as permanent | |
| 2042 storage, i.e. the #assert case. Returns 0 on success, and sets | |
|
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2043 ANSWERP to point to the answer. PRED_LOC is the location of the |
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2044 predicate. */ |
| 0 | 2045 static int |
|
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2046 parse_answer (cpp_reader *pfile, struct answer **answerp, int type, |
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2047 source_location pred_loc) |
| 0 | 2048 { |
| 2049 const cpp_token *paren; | |
| 2050 struct answer *answer; | |
| 2051 unsigned int acount; | |
| 2052 | |
| 2053 /* In a conditional, it is legal to not have an open paren. We | |
| 2054 should save the following token in this case. */ | |
| 2055 paren = cpp_get_token (pfile); | |
| 2056 | |
| 2057 /* If not a paren, see if we're OK. */ | |
| 2058 if (paren->type != CPP_OPEN_PAREN) | |
| 2059 { | |
| 2060 /* In a conditional no answer is a test for any answer. It | |
| 2061 could be followed by any token. */ | |
| 2062 if (type == T_IF) | |
| 2063 { | |
| 2064 _cpp_backup_tokens (pfile, 1); | |
| 2065 return 0; | |
| 2066 } | |
| 2067 | |
| 2068 /* #unassert with no answer is valid - it removes all answers. */ | |
| 2069 if (type == T_UNASSERT && paren->type == CPP_EOF) | |
| 2070 return 0; | |
| 2071 | |
|
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2072 cpp_error_with_line (pfile, CPP_DL_ERROR, pred_loc, 0, |
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2073 "missing '(' after predicate"); |
| 0 | 2074 return 1; |
| 2075 } | |
| 2076 | |
| 2077 for (acount = 0;; acount++) | |
| 2078 { | |
| 2079 size_t room_needed; | |
| 2080 const cpp_token *token = cpp_get_token (pfile); | |
| 2081 cpp_token *dest; | |
| 2082 | |
| 2083 if (token->type == CPP_CLOSE_PAREN) | |
| 2084 break; | |
| 2085 | |
| 2086 if (token->type == CPP_EOF) | |
| 2087 { | |
| 2088 cpp_error (pfile, CPP_DL_ERROR, "missing ')' to complete answer"); | |
| 2089 return 1; | |
| 2090 } | |
| 2091 | |
| 2092 /* struct answer includes the space for one token. */ | |
| 2093 room_needed = (sizeof (struct answer) + acount * sizeof (cpp_token)); | |
| 2094 | |
| 2095 if (BUFF_ROOM (pfile->a_buff) < room_needed) | |
| 2096 _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (struct answer)); | |
| 2097 | |
| 2098 dest = &((struct answer *) BUFF_FRONT (pfile->a_buff))->first[acount]; | |
| 2099 *dest = *token; | |
| 2100 | |
| 2101 /* Drop whitespace at start, for answer equivalence purposes. */ | |
| 2102 if (acount == 0) | |
| 2103 dest->flags &= ~PREV_WHITE; | |
| 2104 } | |
| 2105 | |
| 2106 if (acount == 0) | |
| 2107 { | |
| 2108 cpp_error (pfile, CPP_DL_ERROR, "predicate's answer is empty"); | |
| 2109 return 1; | |
| 2110 } | |
| 2111 | |
| 2112 answer = (struct answer *) BUFF_FRONT (pfile->a_buff); | |
| 2113 answer->count = acount; | |
| 2114 answer->next = NULL; | |
| 2115 *answerp = answer; | |
| 2116 | |
| 2117 return 0; | |
| 2118 } | |
| 2119 | |
| 2120 /* Parses an assertion directive of type TYPE, returning a pointer to | |
| 2121 the hash node of the predicate, or 0 on error. If an answer was | |
| 2122 supplied, it is placed in ANSWERP, otherwise it is set to 0. */ | |
| 2123 static cpp_hashnode * | |
| 2124 parse_assertion (cpp_reader *pfile, struct answer **answerp, int type) | |
| 2125 { | |
| 2126 cpp_hashnode *result = 0; | |
| 2127 const cpp_token *predicate; | |
| 2128 | |
| 2129 /* We don't expand predicates or answers. */ | |
| 2130 pfile->state.prevent_expansion++; | |
| 2131 | |
| 2132 *answerp = 0; | |
| 2133 predicate = cpp_get_token (pfile); | |
| 2134 if (predicate->type == CPP_EOF) | |
| 2135 cpp_error (pfile, CPP_DL_ERROR, "assertion without predicate"); | |
| 2136 else if (predicate->type != CPP_NAME) | |
|
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2137 cpp_error_with_line (pfile, CPP_DL_ERROR, predicate->src_loc, 0, |
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2138 "predicate must be an identifier"); |
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2139 else if (parse_answer (pfile, answerp, type, predicate->src_loc) == 0) |
| 0 | 2140 { |
|
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2141 unsigned int len = NODE_LEN (predicate->val.node.node); |
| 0 | 2142 unsigned char *sym = (unsigned char *) alloca (len + 1); |
| 2143 | |
| 2144 /* Prefix '#' to get it out of macro namespace. */ | |
| 2145 sym[0] = '#'; | |
|
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2146 memcpy (sym + 1, NODE_NAME (predicate->val.node.node), len); |
| 0 | 2147 result = cpp_lookup (pfile, sym, len + 1); |
| 2148 } | |
| 2149 | |
| 2150 pfile->state.prevent_expansion--; | |
| 2151 return result; | |
| 2152 } | |
| 2153 | |
| 2154 /* Returns a pointer to the pointer to CANDIDATE in the answer chain, | |
| 2155 or a pointer to NULL if the answer is not in the chain. */ | |
| 2156 static struct answer ** | |
| 2157 find_answer (cpp_hashnode *node, const struct answer *candidate) | |
| 2158 { | |
| 2159 unsigned int i; | |
| 2160 struct answer **result; | |
| 2161 | |
| 2162 for (result = &node->value.answers; *result; result = &(*result)->next) | |
| 2163 { | |
| 2164 struct answer *answer = *result; | |
| 2165 | |
| 2166 if (answer->count == candidate->count) | |
| 2167 { | |
| 2168 for (i = 0; i < answer->count; i++) | |
| 2169 if (! _cpp_equiv_tokens (&answer->first[i], &candidate->first[i])) | |
| 2170 break; | |
| 2171 | |
| 2172 if (i == answer->count) | |
| 2173 break; | |
| 2174 } | |
| 2175 } | |
| 2176 | |
| 2177 return result; | |
| 2178 } | |
| 2179 | |
| 2180 /* Test an assertion within a preprocessor conditional. Returns | |
| 2181 nonzero on failure, zero on success. On success, the result of | |
| 2182 the test is written into VALUE, otherwise the value 0. */ | |
| 2183 int | |
| 2184 _cpp_test_assertion (cpp_reader *pfile, unsigned int *value) | |
| 2185 { | |
| 2186 struct answer *answer; | |
| 2187 cpp_hashnode *node; | |
| 2188 | |
| 2189 node = parse_assertion (pfile, &answer, T_IF); | |
| 2190 | |
| 2191 /* For recovery, an erroneous assertion expression is handled as a | |
| 2192 failing assertion. */ | |
| 2193 *value = 0; | |
| 2194 | |
| 2195 if (node) | |
| 2196 *value = (node->type == NT_ASSERTION && | |
| 2197 (answer == 0 || *find_answer (node, answer) != 0)); | |
| 2198 else if (pfile->cur_token[-1].type == CPP_EOF) | |
| 2199 _cpp_backup_tokens (pfile, 1); | |
| 2200 | |
| 2201 /* We don't commit the memory for the answer - it's temporary only. */ | |
| 2202 return node == 0; | |
| 2203 } | |
| 2204 | |
| 2205 /* Handle #assert. */ | |
| 2206 static void | |
| 2207 do_assert (cpp_reader *pfile) | |
| 2208 { | |
| 2209 struct answer *new_answer; | |
| 2210 cpp_hashnode *node; | |
| 2211 | |
| 2212 node = parse_assertion (pfile, &new_answer, T_ASSERT); | |
| 2213 if (node) | |
| 2214 { | |
| 2215 size_t answer_size; | |
| 2216 | |
| 2217 /* Place the new answer in the answer list. First check there | |
| 2218 is not a duplicate. */ | |
| 2219 new_answer->next = 0; | |
| 2220 if (node->type == NT_ASSERTION) | |
| 2221 { | |
| 2222 if (*find_answer (node, new_answer)) | |
| 2223 { | |
| 2224 cpp_error (pfile, CPP_DL_WARNING, "\"%s\" re-asserted", | |
| 2225 NODE_NAME (node) + 1); | |
| 2226 return; | |
| 2227 } | |
| 2228 new_answer->next = node->value.answers; | |
| 2229 } | |
| 2230 | |
| 2231 answer_size = sizeof (struct answer) + ((new_answer->count - 1) | |
| 2232 * sizeof (cpp_token)); | |
| 2233 /* Commit or allocate storage for the object. */ | |
| 2234 if (pfile->hash_table->alloc_subobject) | |
| 2235 { | |
| 2236 struct answer *temp_answer = new_answer; | |
| 2237 new_answer = (struct answer *) pfile->hash_table->alloc_subobject | |
| 2238 (answer_size); | |
| 2239 memcpy (new_answer, temp_answer, answer_size); | |
| 2240 } | |
| 2241 else | |
| 2242 BUFF_FRONT (pfile->a_buff) += answer_size; | |
| 2243 | |
| 2244 node->type = NT_ASSERTION; | |
| 2245 node->value.answers = new_answer; | |
|
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|
2246 check_eol (pfile, false); |
| 0 | 2247 } |
| 2248 } | |
| 2249 | |
| 2250 /* Handle #unassert. */ | |
| 2251 static void | |
| 2252 do_unassert (cpp_reader *pfile) | |
| 2253 { | |
| 2254 cpp_hashnode *node; | |
| 2255 struct answer *answer; | |
| 2256 | |
| 2257 node = parse_assertion (pfile, &answer, T_UNASSERT); | |
| 2258 /* It isn't an error to #unassert something that isn't asserted. */ | |
| 2259 if (node && node->type == NT_ASSERTION) | |
| 2260 { | |
| 2261 if (answer) | |
| 2262 { | |
| 2263 struct answer **p = find_answer (node, answer), *temp; | |
| 2264 | |
| 2265 /* Remove the answer from the list. */ | |
| 2266 temp = *p; | |
| 2267 if (temp) | |
| 2268 *p = temp->next; | |
| 2269 | |
| 2270 /* Did we free the last answer? */ | |
| 2271 if (node->value.answers == 0) | |
| 2272 node->type = NT_VOID; | |
| 2273 | |
|
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|
2274 check_eol (pfile, false); |
| 0 | 2275 } |
| 2276 else | |
| 2277 _cpp_free_definition (node); | |
| 2278 } | |
| 2279 | |
| 2280 /* We don't commit the memory for the answer - it's temporary only. */ | |
| 2281 } | |
| 2282 | |
| 2283 /* These are for -D, -U, -A. */ | |
| 2284 | |
| 2285 /* Process the string STR as if it appeared as the body of a #define. | |
| 2286 If STR is just an identifier, define it with value 1. | |
| 2287 If STR has anything after the identifier, then it should | |
| 2288 be identifier=definition. */ | |
| 2289 void | |
| 2290 cpp_define (cpp_reader *pfile, const char *str) | |
| 2291 { | |
|
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|
2292 char *buf; |
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|
2293 const char *p; |
| 0 | 2294 size_t count; |
| 2295 | |
| 2296 /* Copy the entire option so we can modify it. | |
| 2297 Change the first "=" in the string to a space. If there is none, | |
| 2298 tack " 1" on the end. */ | |
| 2299 | |
| 2300 count = strlen (str); | |
| 2301 buf = (char *) alloca (count + 3); | |
| 2302 memcpy (buf, str, count); | |
| 2303 | |
| 2304 p = strchr (str, '='); | |
| 2305 if (p) | |
| 2306 buf[p - str] = ' '; | |
| 2307 else | |
| 2308 { | |
| 2309 buf[count++] = ' '; | |
| 2310 buf[count++] = '1'; | |
| 2311 } | |
| 2312 buf[count] = '\n'; | |
| 2313 | |
| 2314 run_directive (pfile, T_DEFINE, buf, count); | |
| 2315 } | |
| 2316 | |
| 2317 | |
| 2318 /* Use to build macros to be run through cpp_define() as | |
| 2319 described above. | |
| 2320 Example: cpp_define_formatted (pfile, "MACRO=%d", value); */ | |
| 2321 | |
| 2322 void | |
| 2323 cpp_define_formatted (cpp_reader *pfile, const char *fmt, ...) | |
| 2324 { | |
| 2325 char *ptr = NULL; | |
| 2326 | |
| 2327 va_list ap; | |
| 2328 va_start (ap, fmt); | |
| 2329 vasprintf (&ptr, fmt, ap); | |
| 2330 va_end (ap); | |
| 2331 | |
| 2332 cpp_define (pfile, ptr); | |
| 2333 free (ptr); | |
| 2334 } | |
| 2335 | |
| 2336 | |
| 2337 /* Slight variant of the above for use by initialize_builtins. */ | |
| 2338 void | |
| 2339 _cpp_define_builtin (cpp_reader *pfile, const char *str) | |
| 2340 { | |
| 2341 size_t len = strlen (str); | |
| 2342 char *buf = (char *) alloca (len + 1); | |
| 2343 memcpy (buf, str, len); | |
| 2344 buf[len] = '\n'; | |
| 2345 run_directive (pfile, T_DEFINE, buf, len); | |
| 2346 } | |
| 2347 | |
| 2348 /* Process MACRO as if it appeared as the body of an #undef. */ | |
| 2349 void | |
| 2350 cpp_undef (cpp_reader *pfile, const char *macro) | |
| 2351 { | |
| 2352 size_t len = strlen (macro); | |
| 2353 char *buf = (char *) alloca (len + 1); | |
| 2354 memcpy (buf, macro, len); | |
| 2355 buf[len] = '\n'; | |
| 2356 run_directive (pfile, T_UNDEF, buf, len); | |
| 2357 } | |
| 2358 | |
|
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|
2359 /* Replace a previous definition DEF of the macro STR. If DEF is NULL, |
|
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|
2360 or first element is zero, then the macro should be undefined. */ |
|
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|
2361 static void |
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|
2362 cpp_pop_definition (cpp_reader *pfile, struct def_pragma_macro *c) |
| 0 | 2363 { |
|
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|
2364 cpp_hashnode *node = _cpp_lex_identifier (pfile, c->name); |
| 0 | 2365 if (node == NULL) |
| 2366 return; | |
| 2367 | |
| 2368 if (pfile->cb.before_define) | |
| 2369 pfile->cb.before_define (pfile); | |
| 2370 | |
| 2371 if (node->type == NT_MACRO) | |
| 2372 { | |
| 2373 if (pfile->cb.undef) | |
| 2374 pfile->cb.undef (pfile, pfile->directive_line, node); | |
| 2375 if (CPP_OPTION (pfile, warn_unused_macros)) | |
| 2376 _cpp_warn_if_unused_macro (pfile, node, NULL); | |
| 2377 } | |
| 2378 if (node->type != NT_VOID) | |
| 2379 _cpp_free_definition (node); | |
| 2380 | |
|
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|
2381 if (c->is_undef) |
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|
2382 return; |
|
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|
2383 { |
|
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|
2384 size_t namelen; |
|
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|
2385 const uchar *dn; |
|
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|
2386 cpp_hashnode *h = NULL; |
|
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|
2387 cpp_buffer *nbuf; |
|
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|
2388 |
|
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|
2389 namelen = ustrcspn (c->definition, "( \n"); |
|
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|
2390 h = cpp_lookup (pfile, c->definition, namelen); |
|
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|
2391 dn = c->definition + namelen; |
| 0 | 2392 |
|
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|
2393 h->type = NT_VOID; |
|
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|
2394 h->flags &= ~(NODE_POISONED|NODE_BUILTIN|NODE_DISABLED|NODE_USED); |
|
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|
2395 nbuf = cpp_push_buffer (pfile, dn, ustrchr (dn, '\n') - dn, true); |
|
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|
2396 if (nbuf != NULL) |
|
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|
2397 { |
|
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|
2398 _cpp_clean_line (pfile); |
|
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|
2399 nbuf->sysp = 1; |
|
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|
2400 if (!_cpp_create_definition (pfile, h)) |
|
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|
2401 abort (); |
|
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|
2402 _cpp_pop_buffer (pfile); |
|
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|
2403 } |
|
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|
2404 else |
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|
2405 abort (); |
|
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|
2406 h->value.macro->line = c->line; |
|
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|
2407 h->value.macro->syshdr = c->syshdr; |
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|
2408 h->value.macro->used = c->used; |
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|
2409 } |
| 0 | 2410 } |
| 2411 | |
| 2412 /* Process the string STR as if it appeared as the body of a #assert. */ | |
| 2413 void | |
| 2414 cpp_assert (cpp_reader *pfile, const char *str) | |
| 2415 { | |
| 2416 handle_assertion (pfile, str, T_ASSERT); | |
| 2417 } | |
| 2418 | |
| 2419 /* Process STR as if it appeared as the body of an #unassert. */ | |
| 2420 void | |
| 2421 cpp_unassert (cpp_reader *pfile, const char *str) | |
| 2422 { | |
| 2423 handle_assertion (pfile, str, T_UNASSERT); | |
| 2424 } | |
| 2425 | |
| 2426 /* Common code for cpp_assert (-A) and cpp_unassert (-A-). */ | |
| 2427 static void | |
| 2428 handle_assertion (cpp_reader *pfile, const char *str, int type) | |
| 2429 { | |
| 2430 size_t count = strlen (str); | |
| 2431 const char *p = strchr (str, '='); | |
| 2432 | |
| 2433 /* Copy the entire option so we can modify it. Change the first | |
| 2434 "=" in the string to a '(', and tack a ')' on the end. */ | |
| 2435 char *buf = (char *) alloca (count + 2); | |
| 2436 | |
| 2437 memcpy (buf, str, count); | |
| 2438 if (p) | |
| 2439 { | |
| 2440 buf[p - str] = '('; | |
| 2441 buf[count++] = ')'; | |
| 2442 } | |
| 2443 buf[count] = '\n'; | |
| 2444 str = buf; | |
| 2445 | |
| 2446 run_directive (pfile, type, str, count); | |
| 2447 } | |
| 2448 | |
| 2449 /* The options structure. */ | |
| 2450 cpp_options * | |
| 2451 cpp_get_options (cpp_reader *pfile) | |
| 2452 { | |
| 2453 return &pfile->opts; | |
| 2454 } | |
| 2455 | |
| 2456 /* The callbacks structure. */ | |
| 2457 cpp_callbacks * | |
| 2458 cpp_get_callbacks (cpp_reader *pfile) | |
| 2459 { | |
| 2460 return &pfile->cb; | |
| 2461 } | |
| 2462 | |
| 2463 /* Copy the given callbacks structure to our own. */ | |
| 2464 void | |
| 2465 cpp_set_callbacks (cpp_reader *pfile, cpp_callbacks *cb) | |
| 2466 { | |
| 2467 pfile->cb = *cb; | |
| 2468 } | |
| 2469 | |
| 2470 /* The dependencies structure. (Creates one if it hasn't already been.) */ | |
| 2471 struct deps * | |
| 2472 cpp_get_deps (cpp_reader *pfile) | |
| 2473 { | |
| 2474 if (!pfile->deps) | |
| 2475 pfile->deps = deps_init (); | |
| 2476 return pfile->deps; | |
| 2477 } | |
| 2478 | |
| 2479 /* Push a new buffer on the buffer stack. Returns the new buffer; it | |
| 2480 doesn't fail. It does not generate a file change call back; that | |
| 2481 is the responsibility of the caller. */ | |
| 2482 cpp_buffer * | |
| 2483 cpp_push_buffer (cpp_reader *pfile, const uchar *buffer, size_t len, | |
| 2484 int from_stage3) | |
| 2485 { | |
| 2486 cpp_buffer *new_buffer = XOBNEW (&pfile->buffer_ob, cpp_buffer); | |
| 2487 | |
| 2488 /* Clears, amongst other things, if_stack and mi_cmacro. */ | |
| 2489 memset (new_buffer, 0, sizeof (cpp_buffer)); | |
| 2490 | |
| 2491 new_buffer->next_line = new_buffer->buf = buffer; | |
| 2492 new_buffer->rlimit = buffer + len; | |
| 2493 new_buffer->from_stage3 = from_stage3; | |
| 2494 new_buffer->prev = pfile->buffer; | |
| 2495 new_buffer->need_line = true; | |
| 2496 | |
| 2497 pfile->buffer = new_buffer; | |
| 2498 | |
| 2499 return new_buffer; | |
| 2500 } | |
| 2501 | |
| 2502 /* Pops a single buffer, with a file change call-back if appropriate. | |
| 2503 Then pushes the next -include file, if any remain. */ | |
| 2504 void | |
| 2505 _cpp_pop_buffer (cpp_reader *pfile) | |
| 2506 { | |
| 2507 cpp_buffer *buffer = pfile->buffer; | |
| 2508 struct _cpp_file *inc = buffer->file; | |
| 2509 struct if_stack *ifs; | |
| 2510 | |
| 2511 /* Walk back up the conditional stack till we reach its level at | |
| 2512 entry to this file, issuing error messages. */ | |
| 2513 for (ifs = buffer->if_stack; ifs; ifs = ifs->next) | |
| 2514 cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
| 2515 "unterminated #%s", dtable[ifs->type].name); | |
| 2516 | |
| 2517 /* In case of a missing #endif. */ | |
| 2518 pfile->state.skipping = 0; | |
| 2519 | |
| 2520 /* _cpp_do_file_change expects pfile->buffer to be the new one. */ | |
| 2521 pfile->buffer = buffer->prev; | |
| 2522 | |
| 2523 free (buffer->notes); | |
| 2524 | |
| 2525 /* Free the buffer object now; we may want to push a new buffer | |
| 2526 in _cpp_push_next_include_file. */ | |
| 2527 obstack_free (&pfile->buffer_ob, buffer); | |
| 2528 | |
| 2529 if (inc) | |
| 2530 { | |
| 2531 _cpp_pop_file_buffer (pfile, inc); | |
| 2532 | |
| 2533 _cpp_do_file_change (pfile, LC_LEAVE, 0, 0, 0); | |
| 2534 } | |
| 2535 } | |
| 2536 | |
| 2537 /* Enter all recognized directives in the hash table. */ | |
| 2538 void | |
| 2539 _cpp_init_directives (cpp_reader *pfile) | |
| 2540 { | |
| 2541 unsigned int i; | |
| 2542 cpp_hashnode *node; | |
| 2543 | |
| 2544 for (i = 0; i < (unsigned int) N_DIRECTIVES; i++) | |
| 2545 { | |
| 2546 node = cpp_lookup (pfile, dtable[i].name, dtable[i].length); | |
| 2547 node->is_directive = 1; | |
| 2548 node->directive_index = i; | |
| 2549 } | |
| 2550 } |