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