Mercurial > hg > CbC > CbC_gcc
annotate libcpp/directives.c @ 120:f93fa5091070
fix conv1.c
author | mir3636 |
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date | Thu, 08 Mar 2018 14:53:42 +0900 |
parents | 04ced10e8804 |
children | 84e7813d76e9 |
rev | line source |
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0 | 1 /* CPP Library. (Directive handling.) |
111 | 2 Copyright (C) 1986-2017 Free Software Foundation, Inc. |
0 | 3 Contributed by Per Bothner, 1994-95. |
4 Based on CCCP program by Paul Rubin, June 1986 | |
5 Adapted to ANSI C, Richard Stallman, Jan 1987 | |
6 | |
7 This program is free software; you can redistribute it and/or modify it | |
8 under the terms of the GNU General Public License as published by the | |
9 Free Software Foundation; either version 3, or (at your option) any | |
10 later version. | |
11 | |
12 This program is distributed in the hope that it will be useful, | |
13 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 GNU General Public License for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
18 along with this program; see the file COPYING3. If not see | |
19 <http://www.gnu.org/licenses/>. */ | |
20 | |
21 #include "config.h" | |
22 #include "system.h" | |
23 #include "cpplib.h" | |
24 #include "internal.h" | |
25 #include "mkdeps.h" | |
26 #include "obstack.h" | |
27 | |
28 /* Stack of conditionals currently in progress | |
29 (including both successful and failing conditionals). */ | |
30 struct if_stack | |
31 { | |
32 struct if_stack *next; | |
111 | 33 source_location line; /* Line where condition started. */ |
0 | 34 const cpp_hashnode *mi_cmacro;/* macro name for #ifndef around entire file */ |
35 bool skip_elses; /* Can future #else / #elif be skipped? */ | |
36 bool was_skipping; /* If were skipping on entry. */ | |
37 int type; /* Most recent conditional for diagnostics. */ | |
38 }; | |
39 | |
40 /* Contains a registered pragma or pragma namespace. */ | |
41 typedef void (*pragma_cb) (cpp_reader *); | |
42 struct pragma_entry | |
43 { | |
44 struct pragma_entry *next; | |
45 const cpp_hashnode *pragma; /* Name and length. */ | |
46 bool is_nspace; | |
47 bool is_internal; | |
48 bool is_deferred; | |
49 bool allow_expansion; | |
50 union { | |
51 pragma_cb handler; | |
52 struct pragma_entry *space; | |
53 unsigned int ident; | |
54 } u; | |
55 }; | |
56 | |
57 /* Values for the origin field of struct directive. KANDR directives | |
58 come from traditional (K&R) C. STDC89 directives come from the | |
59 1989 C standard. EXTENSION directives are extensions. */ | |
60 #define KANDR 0 | |
61 #define STDC89 1 | |
62 #define EXTENSION 2 | |
63 | |
64 /* Values for the flags field of struct directive. COND indicates a | |
65 conditional; IF_COND an opening conditional. INCL means to treat | |
66 "..." and <...> as q-char and h-char sequences respectively. IN_I | |
67 means this directive should be handled even if -fpreprocessed is in | |
68 effect (these are the directives with callback hooks). | |
69 | |
70 EXPAND is set on directives that are always macro-expanded. */ | |
71 #define COND (1 << 0) | |
72 #define IF_COND (1 << 1) | |
73 #define INCL (1 << 2) | |
74 #define IN_I (1 << 3) | |
75 #define EXPAND (1 << 4) | |
76 #define DEPRECATED (1 << 5) | |
77 | |
78 /* Defines one #-directive, including how to handle it. */ | |
79 typedef void (*directive_handler) (cpp_reader *); | |
80 typedef struct directive directive; | |
81 struct directive | |
82 { | |
83 directive_handler handler; /* Function to handle directive. */ | |
84 const uchar *name; /* Name of directive. */ | |
85 unsigned short length; /* Length of name. */ | |
86 unsigned char origin; /* Origin of directive. */ | |
87 unsigned char flags; /* Flags describing this directive. */ | |
88 }; | |
89 | |
90 /* Forward declarations. */ | |
91 | |
92 static void skip_rest_of_line (cpp_reader *); | |
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93 static void check_eol (cpp_reader *, bool); |
0 | 94 static void start_directive (cpp_reader *); |
95 static void prepare_directive_trad (cpp_reader *); | |
96 static void end_directive (cpp_reader *, int); | |
97 static void directive_diagnostics (cpp_reader *, const directive *, int); | |
98 static void run_directive (cpp_reader *, int, const char *, size_t); | |
99 static char *glue_header_name (cpp_reader *); | |
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100 static const char *parse_include (cpp_reader *, int *, const cpp_token ***, |
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101 source_location *); |
0 | 102 static void push_conditional (cpp_reader *, int, int, const cpp_hashnode *); |
103 static unsigned int read_flag (cpp_reader *, unsigned int); | |
104 static bool strtolinenum (const uchar *, size_t, linenum_type *, bool *); | |
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105 static void do_diagnostic (cpp_reader *, int, int, int); |
0 | 106 static cpp_hashnode *lex_macro_node (cpp_reader *, bool); |
107 static int undefine_macros (cpp_reader *, cpp_hashnode *, void *); | |
108 static void do_include_common (cpp_reader *, enum include_type); | |
109 static struct pragma_entry *lookup_pragma_entry (struct pragma_entry *, | |
110 const cpp_hashnode *); | |
111 static int count_registered_pragmas (struct pragma_entry *); | |
112 static char ** save_registered_pragmas (struct pragma_entry *, char **); | |
113 static char ** restore_registered_pragmas (cpp_reader *, struct pragma_entry *, | |
114 char **); | |
115 static void do_pragma_once (cpp_reader *); | |
116 static void do_pragma_poison (cpp_reader *); | |
117 static void do_pragma_system_header (cpp_reader *); | |
118 static void do_pragma_dependency (cpp_reader *); | |
111 | 119 static void do_pragma_warning_or_error (cpp_reader *, bool error); |
120 static void do_pragma_warning (cpp_reader *); | |
121 static void do_pragma_error (cpp_reader *); | |
0 | 122 static void do_linemarker (cpp_reader *); |
123 static const cpp_token *get_token_no_padding (cpp_reader *); | |
124 static const cpp_token *get__Pragma_string (cpp_reader *); | |
111 | 125 static void destringize_and_run (cpp_reader *, const cpp_string *, |
126 source_location); | |
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127 static int parse_answer (cpp_reader *, struct answer **, int, source_location); |
0 | 128 static cpp_hashnode *parse_assertion (cpp_reader *, struct answer **, int); |
129 static struct answer ** find_answer (cpp_hashnode *, const struct answer *); | |
130 static void handle_assertion (cpp_reader *, const char *, int); | |
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131 static void do_pragma_push_macro (cpp_reader *); |
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132 static void do_pragma_pop_macro (cpp_reader *); |
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133 static void cpp_pop_definition (cpp_reader *, struct def_pragma_macro *); |
0 | 134 |
135 /* This is the table of directive handlers. It is ordered by | |
136 frequency of occurrence; the numbers at the end are directive | |
137 counts from all the source code I have lying around (egcs and libc | |
138 CVS as of 1999-05-18, plus grub-0.5.91, linux-2.2.9, and | |
139 pcmcia-cs-3.0.9). This is no longer important as directive lookup | |
140 is now O(1). All extensions other than #warning, #include_next, | |
141 and #import are deprecated. The name is where the extension | |
142 appears to have come from. */ | |
143 | |
144 #define DIRECTIVE_TABLE \ | |
145 D(define, T_DEFINE = 0, KANDR, IN_I) /* 270554 */ \ | |
146 D(include, T_INCLUDE, KANDR, INCL | EXPAND) /* 52262 */ \ | |
147 D(endif, T_ENDIF, KANDR, COND) /* 45855 */ \ | |
148 D(ifdef, T_IFDEF, KANDR, COND | IF_COND) /* 22000 */ \ | |
149 D(if, T_IF, KANDR, COND | IF_COND | EXPAND) /* 18162 */ \ | |
150 D(else, T_ELSE, KANDR, COND) /* 9863 */ \ | |
151 D(ifndef, T_IFNDEF, KANDR, COND | IF_COND) /* 9675 */ \ | |
152 D(undef, T_UNDEF, KANDR, IN_I) /* 4837 */ \ | |
153 D(line, T_LINE, KANDR, EXPAND) /* 2465 */ \ | |
154 D(elif, T_ELIF, STDC89, COND | EXPAND) /* 610 */ \ | |
155 D(error, T_ERROR, STDC89, 0) /* 475 */ \ | |
156 D(pragma, T_PRAGMA, STDC89, IN_I) /* 195 */ \ | |
157 D(warning, T_WARNING, EXTENSION, 0) /* 22 */ \ | |
158 D(include_next, T_INCLUDE_NEXT, EXTENSION, INCL | EXPAND) /* 19 */ \ | |
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159 D(ident, T_IDENT, EXTENSION, IN_I) /* 11 */ \ |
0 | 160 D(import, T_IMPORT, EXTENSION, INCL | EXPAND) /* 0 ObjC */ \ |
161 D(assert, T_ASSERT, EXTENSION, DEPRECATED) /* 0 SVR4 */ \ | |
162 D(unassert, T_UNASSERT, EXTENSION, DEPRECATED) /* 0 SVR4 */ \ | |
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163 D(sccs, T_SCCS, EXTENSION, IN_I) /* 0 SVR4? */ |
0 | 164 |
165 /* #sccs is synonymous with #ident. */ | |
166 #define do_sccs do_ident | |
167 | |
168 /* Use the table to generate a series of prototypes, an enum for the | |
169 directive names, and an array of directive handlers. */ | |
170 | |
171 #define D(name, t, o, f) static void do_##name (cpp_reader *); | |
172 DIRECTIVE_TABLE | |
173 #undef D | |
174 | |
175 #define D(n, tag, o, f) tag, | |
176 enum | |
177 { | |
178 DIRECTIVE_TABLE | |
179 N_DIRECTIVES | |
180 }; | |
181 #undef D | |
182 | |
183 #define D(name, t, origin, flags) \ | |
184 { do_##name, (const uchar *) #name, \ | |
185 sizeof #name - 1, origin, flags }, | |
186 static const directive dtable[] = | |
187 { | |
188 DIRECTIVE_TABLE | |
189 }; | |
190 #undef D | |
111 | 191 |
192 /* A NULL-terminated array of directive names for use | |
193 when suggesting corrections for misspelled directives. */ | |
194 #define D(name, t, origin, flags) #name, | |
195 static const char * const directive_names[] = { | |
196 DIRECTIVE_TABLE | |
197 NULL | |
198 }; | |
199 #undef D | |
200 | |
0 | 201 #undef DIRECTIVE_TABLE |
202 | |
203 /* Wrapper struct directive for linemarkers. | |
204 The origin is more or less true - the original K+R cpp | |
205 did use this notation in its preprocessed output. */ | |
206 static const directive linemarker_dir = | |
207 { | |
208 do_linemarker, UC"#", 1, KANDR, IN_I | |
209 }; | |
210 | |
211 #define SEEN_EOL() (pfile->cur_token[-1].type == CPP_EOF) | |
212 | |
213 /* Skip any remaining tokens in a directive. */ | |
214 static void | |
215 skip_rest_of_line (cpp_reader *pfile) | |
216 { | |
217 /* Discard all stacked contexts. */ | |
218 while (pfile->context->prev) | |
219 _cpp_pop_context (pfile); | |
220 | |
221 /* Sweep up all tokens remaining on the line. */ | |
222 if (! SEEN_EOL ()) | |
223 while (_cpp_lex_token (pfile)->type != CPP_EOF) | |
224 ; | |
225 } | |
226 | |
111 | 227 /* Helper function for check_oel. */ |
228 | |
0 | 229 static void |
111 | 230 check_eol_1 (cpp_reader *pfile, bool expand, int reason) |
0 | 231 { |
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232 if (! SEEN_EOL () && (expand |
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233 ? cpp_get_token (pfile) |
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234 : _cpp_lex_token (pfile))->type != CPP_EOF) |
111 | 235 cpp_pedwarning (pfile, reason, "extra tokens at end of #%s directive", |
236 pfile->directive->name); | |
237 } | |
238 | |
239 /* Variant of check_eol used for Wendif-labels warnings. */ | |
240 | |
241 static void | |
242 check_eol_endif_labels (cpp_reader *pfile) | |
243 { | |
244 check_eol_1 (pfile, false, CPP_W_ENDIF_LABELS); | |
245 } | |
246 | |
247 /* Ensure there are no stray tokens at the end of a directive. If | |
248 EXPAND is true, tokens macro-expanding to nothing are allowed. */ | |
249 | |
250 static void | |
251 check_eol (cpp_reader *pfile, bool expand) | |
252 { | |
253 check_eol_1 (pfile, expand, CPP_W_NONE); | |
0 | 254 } |
255 | |
256 /* Ensure there are no stray tokens other than comments at the end of | |
257 a directive, and gather the comments. */ | |
258 static const cpp_token ** | |
259 check_eol_return_comments (cpp_reader *pfile) | |
260 { | |
261 size_t c; | |
262 size_t capacity = 8; | |
263 const cpp_token **buf; | |
264 | |
265 buf = XNEWVEC (const cpp_token *, capacity); | |
266 c = 0; | |
267 if (! SEEN_EOL ()) | |
268 { | |
269 while (1) | |
270 { | |
271 const cpp_token *tok; | |
272 | |
273 tok = _cpp_lex_token (pfile); | |
274 if (tok->type == CPP_EOF) | |
275 break; | |
276 if (tok->type != CPP_COMMENT) | |
277 cpp_error (pfile, CPP_DL_PEDWARN, | |
278 "extra tokens at end of #%s directive", | |
279 pfile->directive->name); | |
280 else | |
281 { | |
282 if (c + 1 >= capacity) | |
283 { | |
284 capacity *= 2; | |
285 buf = XRESIZEVEC (const cpp_token *, buf, capacity); | |
286 } | |
287 buf[c] = tok; | |
288 ++c; | |
289 } | |
290 } | |
291 } | |
292 buf[c] = NULL; | |
293 return buf; | |
294 } | |
295 | |
296 /* Called when entering a directive, _Pragma or command-line directive. */ | |
297 static void | |
298 start_directive (cpp_reader *pfile) | |
299 { | |
300 /* Setup in-directive state. */ | |
301 pfile->state.in_directive = 1; | |
302 pfile->state.save_comments = 0; | |
303 pfile->directive_result.type = CPP_PADDING; | |
304 | |
305 /* Some handlers need the position of the # for diagnostics. */ | |
306 pfile->directive_line = pfile->line_table->highest_line; | |
307 } | |
308 | |
309 /* Called when leaving a directive, _Pragma or command-line directive. */ | |
310 static void | |
311 end_directive (cpp_reader *pfile, int skip_line) | |
312 { | |
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313 if (CPP_OPTION (pfile, traditional)) |
0 | 314 { |
315 /* Revert change of prepare_directive_trad. */ | |
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316 if (!pfile->state.in_deferred_pragma) |
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317 pfile->state.prevent_expansion--; |
0 | 318 |
319 if (pfile->directive != &dtable[T_DEFINE]) | |
320 _cpp_remove_overlay (pfile); | |
321 } | |
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322 else if (pfile->state.in_deferred_pragma) |
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323 ; |
0 | 324 /* We don't skip for an assembler #. */ |
325 else if (skip_line) | |
326 { | |
327 skip_rest_of_line (pfile); | |
328 if (!pfile->keep_tokens) | |
329 { | |
330 pfile->cur_run = &pfile->base_run; | |
331 pfile->cur_token = pfile->base_run.base; | |
332 } | |
333 } | |
334 | |
335 /* Restore state. */ | |
336 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
337 pfile->state.in_directive = 0; | |
338 pfile->state.in_expression = 0; | |
339 pfile->state.angled_headers = 0; | |
340 pfile->directive = 0; | |
341 } | |
342 | |
343 /* Prepare to handle the directive in pfile->directive. */ | |
344 static void | |
345 prepare_directive_trad (cpp_reader *pfile) | |
346 { | |
347 if (pfile->directive != &dtable[T_DEFINE]) | |
348 { | |
349 bool no_expand = (pfile->directive | |
350 && ! (pfile->directive->flags & EXPAND)); | |
351 bool was_skipping = pfile->state.skipping; | |
352 | |
353 pfile->state.in_expression = (pfile->directive == &dtable[T_IF] | |
354 || pfile->directive == &dtable[T_ELIF]); | |
355 if (pfile->state.in_expression) | |
356 pfile->state.skipping = false; | |
357 | |
358 if (no_expand) | |
359 pfile->state.prevent_expansion++; | |
111 | 360 _cpp_scan_out_logical_line (pfile, NULL, false); |
0 | 361 if (no_expand) |
362 pfile->state.prevent_expansion--; | |
363 | |
364 pfile->state.skipping = was_skipping; | |
365 _cpp_overlay_buffer (pfile, pfile->out.base, | |
366 pfile->out.cur - pfile->out.base); | |
367 } | |
368 | |
369 /* Stop ISO C from expanding anything. */ | |
370 pfile->state.prevent_expansion++; | |
371 } | |
372 | |
373 /* Output diagnostics for a directive DIR. INDENTED is nonzero if | |
374 the '#' was indented. */ | |
375 static void | |
376 directive_diagnostics (cpp_reader *pfile, const directive *dir, int indented) | |
377 { | |
378 /* Issue -pedantic or deprecated warnings for extensions. We let | |
379 -pedantic take precedence if both are applicable. */ | |
380 if (! pfile->state.skipping) | |
381 { | |
382 if (dir->origin == EXTENSION | |
383 && !(dir == &dtable[T_IMPORT] && CPP_OPTION (pfile, objc)) | |
384 && CPP_PEDANTIC (pfile)) | |
385 cpp_error (pfile, CPP_DL_PEDWARN, "#%s is a GCC extension", dir->name); | |
386 else if (((dir->flags & DEPRECATED) != 0 | |
387 || (dir == &dtable[T_IMPORT] && !CPP_OPTION (pfile, objc))) | |
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388 && CPP_OPTION (pfile, cpp_warn_deprecated)) |
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389 cpp_warning (pfile, CPP_W_DEPRECATED, |
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390 "#%s is a deprecated GCC extension", dir->name); |
0 | 391 } |
392 | |
393 /* Traditionally, a directive is ignored unless its # is in | |
394 column 1. Therefore in code intended to work with K+R | |
395 compilers, directives added by C89 must have their # | |
396 indented, and directives present in traditional C must not. | |
397 This is true even of directives in skipped conditional | |
398 blocks. #elif cannot be used at all. */ | |
399 if (CPP_WTRADITIONAL (pfile)) | |
400 { | |
401 if (dir == &dtable[T_ELIF]) | |
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402 cpp_warning (pfile, CPP_W_TRADITIONAL, |
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403 "suggest not using #elif in traditional C"); |
0 | 404 else if (indented && dir->origin == KANDR) |
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405 cpp_warning (pfile, CPP_W_TRADITIONAL, |
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406 "traditional C ignores #%s with the # indented", |
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407 dir->name); |
0 | 408 else if (!indented && dir->origin != KANDR) |
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409 cpp_warning (pfile, CPP_W_TRADITIONAL, |
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410 "suggest hiding #%s from traditional C with an indented #", |
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411 dir->name); |
0 | 412 } |
413 } | |
414 | |
415 /* Check if we have a known directive. INDENTED is nonzero if the | |
416 '#' of the directive was indented. This function is in this file | |
417 to save unnecessarily exporting dtable etc. to lex.c. Returns | |
418 nonzero if the line of tokens has been handled, zero if we should | |
419 continue processing the line. */ | |
420 int | |
421 _cpp_handle_directive (cpp_reader *pfile, int indented) | |
422 { | |
423 const directive *dir = 0; | |
424 const cpp_token *dname; | |
425 bool was_parsing_args = pfile->state.parsing_args; | |
426 bool was_discarding_output = pfile->state.discarding_output; | |
427 int skip = 1; | |
428 | |
429 if (was_discarding_output) | |
430 pfile->state.prevent_expansion = 0; | |
431 | |
432 if (was_parsing_args) | |
433 { | |
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434 if (CPP_OPTION (pfile, cpp_pedantic)) |
0 | 435 cpp_error (pfile, CPP_DL_PEDWARN, |
436 "embedding a directive within macro arguments is not portable"); | |
437 pfile->state.parsing_args = 0; | |
438 pfile->state.prevent_expansion = 0; | |
439 } | |
440 start_directive (pfile); | |
441 dname = _cpp_lex_token (pfile); | |
442 | |
443 if (dname->type == CPP_NAME) | |
444 { | |
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445 if (dname->val.node.node->is_directive) |
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446 dir = &dtable[dname->val.node.node->directive_index]; |
0 | 447 } |
448 /* We do not recognize the # followed by a number extension in | |
449 assembler code. */ | |
450 else if (dname->type == CPP_NUMBER && CPP_OPTION (pfile, lang) != CLK_ASM) | |
451 { | |
452 dir = &linemarker_dir; | |
453 if (CPP_PEDANTIC (pfile) && ! CPP_OPTION (pfile, preprocessed) | |
454 && ! pfile->state.skipping) | |
455 cpp_error (pfile, CPP_DL_PEDWARN, | |
456 "style of line directive is a GCC extension"); | |
457 } | |
458 | |
459 if (dir) | |
460 { | |
461 /* If we have a directive that is not an opening conditional, | |
462 invalidate any control macro. */ | |
463 if (! (dir->flags & IF_COND)) | |
464 pfile->mi_valid = false; | |
465 | |
466 /* Kluge alert. In order to be sure that code like this | |
467 | |
468 #define HASH # | |
469 HASH define foo bar | |
470 | |
471 does not cause '#define foo bar' to get executed when | |
472 compiled with -save-temps, we recognize directives in | |
473 -fpreprocessed mode only if the # is in column 1. macro.c | |
474 puts a space in front of any '#' at the start of a macro. | |
475 | |
476 We exclude the -fdirectives-only case because macro expansion | |
477 has not been performed yet, and block comments can cause spaces | |
111 | 478 to precede the directive. */ |
0 | 479 if (CPP_OPTION (pfile, preprocessed) |
480 && !CPP_OPTION (pfile, directives_only) | |
481 && (indented || !(dir->flags & IN_I))) | |
482 { | |
483 skip = 0; | |
484 dir = 0; | |
485 } | |
486 else | |
487 { | |
488 /* In failed conditional groups, all non-conditional | |
489 directives are ignored. Before doing that, whether | |
490 skipping or not, we should lex angle-bracketed headers | |
491 correctly, and maybe output some diagnostics. */ | |
492 pfile->state.angled_headers = dir->flags & INCL; | |
493 pfile->state.directive_wants_padding = dir->flags & INCL; | |
494 if (! CPP_OPTION (pfile, preprocessed)) | |
495 directive_diagnostics (pfile, dir, indented); | |
496 if (pfile->state.skipping && !(dir->flags & COND)) | |
497 dir = 0; | |
498 } | |
499 } | |
500 else if (dname->type == CPP_EOF) | |
501 ; /* CPP_EOF is the "null directive". */ | |
502 else | |
503 { | |
504 /* An unknown directive. Don't complain about it in assembly | |
505 source: we don't know where the comments are, and # may | |
506 introduce assembler pseudo-ops. Don't complain about invalid | |
507 directives in skipped conditional groups (6.10 p4). */ | |
508 if (CPP_OPTION (pfile, lang) == CLK_ASM) | |
509 skip = 0; | |
510 else if (!pfile->state.skipping) | |
111 | 511 { |
512 const char *unrecognized | |
513 = (const char *)cpp_token_as_text (pfile, dname); | |
514 const char *hint = NULL; | |
515 | |
516 /* Call back into gcc to get a spelling suggestion. Ideally | |
517 we'd just use best_match from gcc/spellcheck.h (and filter | |
518 out the uncommon directives), but that requires moving it | |
519 to a support library. */ | |
520 if (pfile->cb.get_suggestion) | |
521 hint = pfile->cb.get_suggestion (pfile, unrecognized, | |
522 directive_names); | |
523 | |
524 if (hint) | |
525 { | |
526 rich_location richloc (pfile->line_table, dname->src_loc); | |
527 source_range misspelled_token_range | |
528 = get_range_from_loc (pfile->line_table, dname->src_loc); | |
529 richloc.add_fixit_replace (misspelled_token_range, hint); | |
530 cpp_error_at_richloc (pfile, CPP_DL_ERROR, &richloc, | |
531 "invalid preprocessing directive #%s;" | |
532 " did you mean #%s?", | |
533 unrecognized, hint); | |
534 } | |
535 else | |
536 cpp_error (pfile, CPP_DL_ERROR, | |
537 "invalid preprocessing directive #%s", | |
538 unrecognized); | |
539 } | |
0 | 540 } |
541 | |
542 pfile->directive = dir; | |
543 if (CPP_OPTION (pfile, traditional)) | |
544 prepare_directive_trad (pfile); | |
545 | |
546 if (dir) | |
547 pfile->directive->handler (pfile); | |
548 else if (skip == 0) | |
549 _cpp_backup_tokens (pfile, 1); | |
550 | |
551 end_directive (pfile, skip); | |
552 if (was_parsing_args && !pfile->state.in_deferred_pragma) | |
553 { | |
554 /* Restore state when within macro args. */ | |
555 pfile->state.parsing_args = 2; | |
556 pfile->state.prevent_expansion = 1; | |
557 } | |
558 if (was_discarding_output) | |
559 pfile->state.prevent_expansion = 1; | |
560 return skip; | |
561 } | |
562 | |
563 /* Directive handler wrapper used by the command line option | |
564 processor. BUF is \n terminated. */ | |
565 static void | |
566 run_directive (cpp_reader *pfile, int dir_no, const char *buf, size_t count) | |
567 { | |
568 cpp_push_buffer (pfile, (const uchar *) buf, count, | |
569 /* from_stage3 */ true); | |
570 start_directive (pfile); | |
571 | |
572 /* This is a short-term fix to prevent a leading '#' being | |
573 interpreted as a directive. */ | |
574 _cpp_clean_line (pfile); | |
575 | |
576 pfile->directive = &dtable[dir_no]; | |
577 if (CPP_OPTION (pfile, traditional)) | |
578 prepare_directive_trad (pfile); | |
579 pfile->directive->handler (pfile); | |
580 end_directive (pfile, 1); | |
581 _cpp_pop_buffer (pfile); | |
582 } | |
583 | |
584 /* Checks for validity the macro name in #define, #undef, #ifdef and | |
585 #ifndef directives. IS_DEF_OR_UNDEF is true if this call is | |
586 processing a #define or #undefine directive, and false | |
587 otherwise. */ | |
588 static cpp_hashnode * | |
589 lex_macro_node (cpp_reader *pfile, bool is_def_or_undef) | |
590 { | |
591 const cpp_token *token = _cpp_lex_token (pfile); | |
592 | |
593 /* The token immediately after #define must be an identifier. That | |
594 identifier may not be "defined", per C99 6.10.8p4. | |
595 In C++, it may not be any of the "named operators" either, | |
596 per C++98 [lex.digraph], [lex.key]. | |
597 Finally, the identifier may not have been poisoned. (In that case | |
598 the lexer has issued the error message for us.) */ | |
599 | |
600 if (token->type == CPP_NAME) | |
601 { | |
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602 cpp_hashnode *node = token->val.node.node; |
0 | 603 |
604 if (is_def_or_undef && node == pfile->spec_nodes.n_defined) | |
605 cpp_error (pfile, CPP_DL_ERROR, | |
606 "\"defined\" cannot be used as a macro name"); | |
111 | 607 else if (is_def_or_undef |
608 && (node == pfile->spec_nodes.n__has_include__ | |
609 || node == pfile->spec_nodes.n__has_include_next__)) | |
610 cpp_error (pfile, CPP_DL_ERROR, | |
611 "\"__has_include__\" cannot be used as a macro name"); | |
0 | 612 else if (! (node->flags & NODE_POISONED)) |
613 return node; | |
614 } | |
615 else if (token->flags & NAMED_OP) | |
616 cpp_error (pfile, CPP_DL_ERROR, | |
617 "\"%s\" cannot be used as a macro name as it is an operator in C++", | |
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618 NODE_NAME (token->val.node.node)); |
0 | 619 else if (token->type == CPP_EOF) |
620 cpp_error (pfile, CPP_DL_ERROR, "no macro name given in #%s directive", | |
621 pfile->directive->name); | |
622 else | |
623 cpp_error (pfile, CPP_DL_ERROR, "macro names must be identifiers"); | |
624 | |
625 return NULL; | |
626 } | |
627 | |
628 /* Process a #define directive. Most work is done in macro.c. */ | |
629 static void | |
630 do_define (cpp_reader *pfile) | |
631 { | |
632 cpp_hashnode *node = lex_macro_node (pfile, true); | |
633 | |
634 if (node) | |
635 { | |
636 /* If we have been requested to expand comments into macros, | |
637 then re-enable saving of comments. */ | |
638 pfile->state.save_comments = | |
639 ! CPP_OPTION (pfile, discard_comments_in_macro_exp); | |
640 | |
641 if (pfile->cb.before_define) | |
642 pfile->cb.before_define (pfile); | |
643 | |
644 if (_cpp_create_definition (pfile, node)) | |
645 if (pfile->cb.define) | |
646 pfile->cb.define (pfile, pfile->directive_line, node); | |
647 | |
648 node->flags &= ~NODE_USED; | |
649 } | |
650 } | |
651 | |
652 /* Handle #undef. Mark the identifier NT_VOID in the hash table. */ | |
653 static void | |
654 do_undef (cpp_reader *pfile) | |
655 { | |
656 cpp_hashnode *node = lex_macro_node (pfile, true); | |
657 | |
658 if (node) | |
659 { | |
660 if (pfile->cb.before_define) | |
661 pfile->cb.before_define (pfile); | |
662 | |
663 if (pfile->cb.undef) | |
664 pfile->cb.undef (pfile, pfile->directive_line, node); | |
665 | |
666 /* 6.10.3.5 paragraph 2: [#undef] is ignored if the specified | |
667 identifier is not currently defined as a macro name. */ | |
668 if (node->type == NT_MACRO) | |
669 { | |
670 if (node->flags & NODE_WARN) | |
671 cpp_error (pfile, CPP_DL_WARNING, | |
672 "undefining \"%s\"", NODE_NAME (node)); | |
111 | 673 else if ((node->flags & NODE_BUILTIN) |
674 && CPP_OPTION (pfile, warn_builtin_macro_redefined)) | |
675 cpp_warning_with_line (pfile, CPP_W_BUILTIN_MACRO_REDEFINED, | |
676 pfile->directive_line, 0, | |
677 "undefining \"%s\"", NODE_NAME (node)); | |
0 | 678 |
679 if (CPP_OPTION (pfile, warn_unused_macros)) | |
680 _cpp_warn_if_unused_macro (pfile, node, NULL); | |
681 | |
682 _cpp_free_definition (node); | |
683 } | |
684 } | |
685 | |
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686 check_eol (pfile, false); |
0 | 687 } |
688 | |
689 /* Undefine a single macro/assertion/whatever. */ | |
690 | |
691 static int | |
692 undefine_macros (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *h, | |
693 void *data_p ATTRIBUTE_UNUSED) | |
694 { | |
695 /* Body of _cpp_free_definition inlined here for speed. | |
696 Macros and assertions no longer have anything to free. */ | |
697 h->type = NT_VOID; | |
698 h->flags &= ~(NODE_POISONED|NODE_BUILTIN|NODE_DISABLED|NODE_USED); | |
699 return 1; | |
700 } | |
701 | |
702 /* Undefine all macros and assertions. */ | |
703 | |
704 void | |
705 cpp_undef_all (cpp_reader *pfile) | |
706 { | |
707 cpp_forall_identifiers (pfile, undefine_macros, NULL); | |
708 } | |
709 | |
710 | |
711 /* Helper routine used by parse_include. Reinterpret the current line | |
712 as an h-char-sequence (< ... >); we are looking at the first token | |
713 after the <. Returns a malloced filename. */ | |
714 static char * | |
715 glue_header_name (cpp_reader *pfile) | |
716 { | |
717 const cpp_token *token; | |
718 char *buffer; | |
719 size_t len, total_len = 0, capacity = 1024; | |
720 | |
721 /* To avoid lexed tokens overwriting our glued name, we can only | |
722 allocate from the string pool once we've lexed everything. */ | |
723 buffer = XNEWVEC (char, capacity); | |
724 for (;;) | |
725 { | |
726 token = get_token_no_padding (pfile); | |
727 | |
728 if (token->type == CPP_GREATER) | |
729 break; | |
730 if (token->type == CPP_EOF) | |
731 { | |
732 cpp_error (pfile, CPP_DL_ERROR, "missing terminating > character"); | |
733 break; | |
734 } | |
735 | |
736 len = cpp_token_len (token) + 2; /* Leading space, terminating \0. */ | |
737 if (total_len + len > capacity) | |
738 { | |
739 capacity = (capacity + len) * 2; | |
740 buffer = XRESIZEVEC (char, buffer, capacity); | |
741 } | |
742 | |
743 if (token->flags & PREV_WHITE) | |
744 buffer[total_len++] = ' '; | |
745 | |
746 total_len = (cpp_spell_token (pfile, token, (uchar *) &buffer[total_len], | |
747 true) | |
748 - (uchar *) buffer); | |
749 } | |
750 | |
751 buffer[total_len] = '\0'; | |
752 return buffer; | |
753 } | |
754 | |
755 /* Returns the file name of #include, #include_next, #import and | |
756 #pragma dependency. The string is malloced and the caller should | |
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757 free it. Returns NULL on error. LOCATION is the source location |
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758 of the file name. */ |
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759 |
0 | 760 static const char * |
761 parse_include (cpp_reader *pfile, int *pangle_brackets, | |
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762 const cpp_token ***buf, source_location *location) |
0 | 763 { |
764 char *fname; | |
765 const cpp_token *header; | |
766 | |
767 /* Allow macro expansion. */ | |
768 header = get_token_no_padding (pfile); | |
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769 *location = header->src_loc; |
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770 if ((header->type == CPP_STRING && header->val.str.text[0] != 'R') |
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771 || header->type == CPP_HEADER_NAME) |
0 | 772 { |
773 fname = XNEWVEC (char, header->val.str.len - 1); | |
774 memcpy (fname, header->val.str.text + 1, header->val.str.len - 2); | |
775 fname[header->val.str.len - 2] = '\0'; | |
776 *pangle_brackets = header->type == CPP_HEADER_NAME; | |
777 } | |
778 else if (header->type == CPP_LESS) | |
779 { | |
780 fname = glue_header_name (pfile); | |
781 *pangle_brackets = 1; | |
782 } | |
783 else | |
784 { | |
785 const unsigned char *dir; | |
786 | |
787 if (pfile->directive == &dtable[T_PRAGMA]) | |
788 dir = UC"pragma dependency"; | |
789 else | |
790 dir = pfile->directive->name; | |
791 cpp_error (pfile, CPP_DL_ERROR, "#%s expects \"FILENAME\" or <FILENAME>", | |
792 dir); | |
793 | |
794 return NULL; | |
795 } | |
796 | |
797 if (pfile->directive == &dtable[T_PRAGMA]) | |
798 { | |
799 /* This pragma allows extra tokens after the file name. */ | |
800 } | |
801 else if (buf == NULL || CPP_OPTION (pfile, discard_comments)) | |
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802 check_eol (pfile, true); |
0 | 803 else |
804 { | |
805 /* If we are not discarding comments, then gather them while | |
806 doing the eol check. */ | |
807 *buf = check_eol_return_comments (pfile); | |
808 } | |
809 | |
810 return fname; | |
811 } | |
812 | |
813 /* Handle #include, #include_next and #import. */ | |
814 static void | |
815 do_include_common (cpp_reader *pfile, enum include_type type) | |
816 { | |
817 const char *fname; | |
818 int angle_brackets; | |
819 const cpp_token **buf = NULL; | |
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820 source_location location; |
0 | 821 |
822 /* Re-enable saving of comments if requested, so that the include | |
823 callback can dump comments which follow #include. */ | |
824 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
825 | |
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826 fname = parse_include (pfile, &angle_brackets, &buf, &location); |
0 | 827 if (!fname) |
828 { | |
829 if (buf) | |
830 XDELETEVEC (buf); | |
831 return; | |
832 } | |
833 | |
834 if (!*fname) | |
835 { | |
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836 cpp_error_with_line (pfile, CPP_DL_ERROR, location, 0, |
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837 "empty filename in #%s", |
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838 pfile->directive->name); |
0 | 839 XDELETEVEC (fname); |
840 if (buf) | |
841 XDELETEVEC (buf); | |
842 return; | |
843 } | |
844 | |
845 /* Prevent #include recursion. */ | |
846 if (pfile->line_table->depth >= CPP_STACK_MAX) | |
847 cpp_error (pfile, CPP_DL_ERROR, "#include nested too deeply"); | |
848 else | |
849 { | |
850 /* Get out of macro context, if we are. */ | |
851 skip_rest_of_line (pfile); | |
852 | |
853 if (pfile->cb.include) | |
854 pfile->cb.include (pfile, pfile->directive_line, | |
855 pfile->directive->name, fname, angle_brackets, | |
856 buf); | |
857 | |
111 | 858 _cpp_stack_include (pfile, fname, angle_brackets, type, location); |
0 | 859 } |
860 | |
861 XDELETEVEC (fname); | |
862 if (buf) | |
863 XDELETEVEC (buf); | |
864 } | |
865 | |
866 static void | |
867 do_include (cpp_reader *pfile) | |
868 { | |
869 do_include_common (pfile, IT_INCLUDE); | |
870 } | |
871 | |
872 static void | |
873 do_import (cpp_reader *pfile) | |
874 { | |
875 do_include_common (pfile, IT_IMPORT); | |
876 } | |
877 | |
878 static void | |
879 do_include_next (cpp_reader *pfile) | |
880 { | |
881 enum include_type type = IT_INCLUDE_NEXT; | |
882 | |
883 /* If this is the primary source file, warn and use the normal | |
884 search logic. */ | |
885 if (cpp_in_primary_file (pfile)) | |
886 { | |
887 cpp_error (pfile, CPP_DL_WARNING, | |
888 "#include_next in primary source file"); | |
889 type = IT_INCLUDE; | |
890 } | |
891 do_include_common (pfile, type); | |
892 } | |
893 | |
894 /* Subroutine of do_linemarker. Read possible flags after file name. | |
895 LAST is the last flag seen; 0 if this is the first flag. Return the | |
896 flag if it is valid, 0 at the end of the directive. Otherwise | |
897 complain. */ | |
898 static unsigned int | |
899 read_flag (cpp_reader *pfile, unsigned int last) | |
900 { | |
901 const cpp_token *token = _cpp_lex_token (pfile); | |
902 | |
903 if (token->type == CPP_NUMBER && token->val.str.len == 1) | |
904 { | |
905 unsigned int flag = token->val.str.text[0] - '0'; | |
906 | |
907 if (flag > last && flag <= 4 | |
908 && (flag != 4 || last == 3) | |
909 && (flag != 2 || last == 0)) | |
910 return flag; | |
911 } | |
912 | |
913 if (token->type != CPP_EOF) | |
914 cpp_error (pfile, CPP_DL_ERROR, "invalid flag \"%s\" in line directive", | |
915 cpp_token_as_text (pfile, token)); | |
916 return 0; | |
917 } | |
918 | |
919 /* Subroutine of do_line and do_linemarker. Convert a number in STR, | |
920 of length LEN, to binary; store it in NUMP, and return false if the | |
921 number was well-formed, true if not. WRAPPED is set to true if the | |
922 number did not fit into 'unsigned long'. */ | |
923 static bool | |
924 strtolinenum (const uchar *str, size_t len, linenum_type *nump, bool *wrapped) | |
925 { | |
926 linenum_type reg = 0; | |
927 linenum_type reg_prev = 0; | |
928 | |
929 uchar c; | |
930 *wrapped = false; | |
931 while (len--) | |
932 { | |
933 c = *str++; | |
934 if (!ISDIGIT (c)) | |
935 return true; | |
936 reg *= 10; | |
937 reg += c - '0'; | |
938 if (reg < reg_prev) | |
939 *wrapped = true; | |
940 reg_prev = reg; | |
941 } | |
942 *nump = reg; | |
943 return false; | |
944 } | |
945 | |
946 /* Interpret #line command. | |
947 Note that the filename string (if any) is a true string constant | |
948 (escapes are interpreted), unlike in #line. */ | |
949 static void | |
950 do_line (cpp_reader *pfile) | |
951 { | |
111 | 952 struct line_maps *line_table = pfile->line_table; |
953 const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table); | |
0 | 954 |
955 /* skip_rest_of_line() may cause line table to be realloc()ed so note down | |
956 sysp right now. */ | |
957 | |
111 | 958 unsigned char map_sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (map); |
0 | 959 const cpp_token *token; |
111 | 960 const char *new_file = ORDINARY_MAP_FILE_NAME (map); |
0 | 961 linenum_type new_lineno; |
962 | |
963 /* C99 raised the minimum limit on #line numbers. */ | |
964 linenum_type cap = CPP_OPTION (pfile, c99) ? 2147483647 : 32767; | |
965 bool wrapped; | |
966 | |
967 /* #line commands expand macros. */ | |
968 token = cpp_get_token (pfile); | |
969 if (token->type != CPP_NUMBER | |
970 || strtolinenum (token->val.str.text, token->val.str.len, | |
971 &new_lineno, &wrapped)) | |
972 { | |
973 if (token->type == CPP_EOF) | |
974 cpp_error (pfile, CPP_DL_ERROR, "unexpected end of file after #line"); | |
975 else | |
976 cpp_error (pfile, CPP_DL_ERROR, | |
977 "\"%s\" after #line is not a positive integer", | |
978 cpp_token_as_text (pfile, token)); | |
979 return; | |
980 } | |
981 | |
982 if (CPP_PEDANTIC (pfile) && (new_lineno == 0 || new_lineno > cap || wrapped)) | |
983 cpp_error (pfile, CPP_DL_PEDWARN, "line number out of range"); | |
984 else if (wrapped) | |
985 cpp_error (pfile, CPP_DL_WARNING, "line number out of range"); | |
986 | |
987 token = cpp_get_token (pfile); | |
988 if (token->type == CPP_STRING) | |
989 { | |
990 cpp_string s = { 0, 0 }; | |
991 if (cpp_interpret_string_notranslate (pfile, &token->val.str, 1, | |
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992 &s, CPP_STRING)) |
0 | 993 new_file = (const char *)s.text; |
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994 check_eol (pfile, true); |
0 | 995 } |
996 else if (token->type != CPP_EOF) | |
997 { | |
998 cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", | |
999 cpp_token_as_text (pfile, token)); | |
1000 return; | |
1001 } | |
1002 | |
1003 skip_rest_of_line (pfile); | |
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1004 _cpp_do_file_change (pfile, LC_RENAME_VERBATIM, new_file, new_lineno, |
0 | 1005 map_sysp); |
111 | 1006 line_table->seen_line_directive = true; |
0 | 1007 } |
1008 | |
1009 /* Interpret the # 44 "file" [flags] notation, which has slightly | |
1010 different syntax and semantics from #line: Flags are allowed, | |
1011 and we never complain about the line number being too big. */ | |
1012 static void | |
1013 do_linemarker (cpp_reader *pfile) | |
1014 { | |
111 | 1015 struct line_maps *line_table = pfile->line_table; |
1016 const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table); | |
0 | 1017 const cpp_token *token; |
111 | 1018 const char *new_file = ORDINARY_MAP_FILE_NAME (map); |
0 | 1019 linenum_type new_lineno; |
111 | 1020 unsigned int new_sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (map); |
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1021 enum lc_reason reason = LC_RENAME_VERBATIM; |
0 | 1022 int flag; |
1023 bool wrapped; | |
1024 | |
1025 /* Back up so we can get the number again. Putting this in | |
1026 _cpp_handle_directive risks two calls to _cpp_backup_tokens in | |
1027 some circumstances, which can segfault. */ | |
1028 _cpp_backup_tokens (pfile, 1); | |
1029 | |
1030 /* #line commands expand macros. */ | |
1031 token = cpp_get_token (pfile); | |
1032 if (token->type != CPP_NUMBER | |
1033 || strtolinenum (token->val.str.text, token->val.str.len, | |
1034 &new_lineno, &wrapped)) | |
1035 { | |
1036 /* Unlike #line, there does not seem to be a way to get an EOF | |
1037 here. So, it should be safe to always spell the token. */ | |
1038 cpp_error (pfile, CPP_DL_ERROR, | |
1039 "\"%s\" after # is not a positive integer", | |
1040 cpp_token_as_text (pfile, token)); | |
1041 return; | |
1042 } | |
1043 | |
1044 token = cpp_get_token (pfile); | |
1045 if (token->type == CPP_STRING) | |
1046 { | |
1047 cpp_string s = { 0, 0 }; | |
1048 if (cpp_interpret_string_notranslate (pfile, &token->val.str, | |
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1049 1, &s, CPP_STRING)) |
0 | 1050 new_file = (const char *)s.text; |
1051 | |
1052 new_sysp = 0; | |
1053 flag = read_flag (pfile, 0); | |
1054 if (flag == 1) | |
1055 { | |
1056 reason = LC_ENTER; | |
1057 /* Fake an include for cpp_included (). */ | |
1058 _cpp_fake_include (pfile, new_file); | |
1059 flag = read_flag (pfile, flag); | |
1060 } | |
1061 else if (flag == 2) | |
1062 { | |
1063 reason = LC_LEAVE; | |
1064 flag = read_flag (pfile, flag); | |
1065 } | |
1066 if (flag == 3) | |
1067 { | |
1068 new_sysp = 1; | |
1069 flag = read_flag (pfile, flag); | |
1070 if (flag == 4) | |
1071 new_sysp = 2; | |
1072 } | |
1073 pfile->buffer->sysp = new_sysp; | |
1074 | |
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1075 check_eol (pfile, false); |
0 | 1076 } |
1077 else if (token->type != CPP_EOF) | |
1078 { | |
1079 cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", | |
1080 cpp_token_as_text (pfile, token)); | |
1081 return; | |
1082 } | |
1083 | |
1084 skip_rest_of_line (pfile); | |
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1085 |
111 | 1086 if (reason == LC_LEAVE) |
1087 { | |
1088 /* Reread map since cpp_get_token can invalidate it with a | |
1089 reallocation. */ | |
1090 map = LINEMAPS_LAST_ORDINARY_MAP (line_table); | |
1091 const line_map_ordinary *from; | |
1092 if (MAIN_FILE_P (map) | |
1093 || (new_file | |
1094 && (from = INCLUDED_FROM (pfile->line_table, map)) != NULL | |
1095 && filename_cmp (ORDINARY_MAP_FILE_NAME (from), new_file) != 0)) | |
1096 { | |
1097 cpp_warning (pfile, CPP_W_NONE, | |
1098 "file \"%s\" linemarker ignored due to " | |
1099 "incorrect nesting", new_file); | |
1100 return; | |
1101 } | |
1102 } | |
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1103 /* Compensate for the increment in linemap_add that occurs in |
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1104 _cpp_do_file_change. We're currently at the start of the line |
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1105 *following* the #line directive. A separate source_location for this |
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1106 location makes no sense (until we do the LC_LEAVE), and |
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1107 complicates LAST_SOURCE_LINE_LOCATION. */ |
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1108 pfile->line_table->highest_location--; |
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1109 |
0 | 1110 _cpp_do_file_change (pfile, reason, new_file, new_lineno, new_sysp); |
111 | 1111 line_table->seen_line_directive = true; |
0 | 1112 } |
1113 | |
1114 /* Arrange the file_change callback. pfile->line has changed to | |
1115 FILE_LINE of TO_FILE, for reason REASON. SYSP is 1 for a system | |
1116 header, 2 for a system header that needs to be extern "C" protected, | |
1117 and zero otherwise. */ | |
1118 void | |
1119 _cpp_do_file_change (cpp_reader *pfile, enum lc_reason reason, | |
1120 const char *to_file, linenum_type file_line, | |
1121 unsigned int sysp) | |
1122 { | |
111 | 1123 linemap_assert (reason != LC_ENTER_MACRO); |
0 | 1124 const struct line_map *map = linemap_add (pfile->line_table, reason, sysp, |
1125 to_file, file_line); | |
111 | 1126 const line_map_ordinary *ord_map = NULL; |
0 | 1127 if (map != NULL) |
111 | 1128 { |
1129 ord_map = linemap_check_ordinary (map); | |
1130 linemap_line_start (pfile->line_table, | |
1131 ORDINARY_MAP_STARTING_LINE_NUMBER (ord_map), | |
1132 127); | |
1133 } | |
0 | 1134 |
1135 if (pfile->cb.file_change) | |
111 | 1136 pfile->cb.file_change (pfile, ord_map); |
0 | 1137 } |
1138 | |
1139 /* Report a warning or error detected by the program we are | |
1140 processing. Use the directive's tokens in the error message. */ | |
1141 static void | |
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1142 do_diagnostic (cpp_reader *pfile, int code, int reason, int print_dir) |
0 | 1143 { |
1144 const unsigned char *dir_name; | |
1145 unsigned char *line; | |
1146 source_location src_loc = pfile->cur_token[-1].src_loc; | |
1147 | |
1148 if (print_dir) | |
1149 dir_name = pfile->directive->name; | |
1150 else | |
1151 dir_name = NULL; | |
1152 pfile->state.prevent_expansion++; | |
1153 line = cpp_output_line_to_string (pfile, dir_name); | |
1154 pfile->state.prevent_expansion--; | |
1155 | |
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1156 if (code == CPP_DL_WARNING_SYSHDR && reason) |
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1157 cpp_warning_with_line_syshdr (pfile, reason, src_loc, 0, "%s", line); |
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1158 else if (code == CPP_DL_WARNING && reason) |
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1159 cpp_warning_with_line (pfile, reason, src_loc, 0, "%s", line); |
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1160 else |
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1161 cpp_error_with_line (pfile, code, src_loc, 0, "%s", line); |
0 | 1162 free (line); |
1163 } | |
1164 | |
1165 static void | |
1166 do_error (cpp_reader *pfile) | |
1167 { | |
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1168 do_diagnostic (pfile, CPP_DL_ERROR, 0, 1); |
0 | 1169 } |
1170 | |
1171 static void | |
1172 do_warning (cpp_reader *pfile) | |
1173 { | |
1174 /* We want #warning diagnostics to be emitted in system headers too. */ | |
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1175 do_diagnostic (pfile, CPP_DL_WARNING_SYSHDR, CPP_W_WARNING_DIRECTIVE, 1); |
0 | 1176 } |
1177 | |
1178 /* Report program identification. */ | |
1179 static void | |
1180 do_ident (cpp_reader *pfile) | |
1181 { | |
1182 const cpp_token *str = cpp_get_token (pfile); | |
1183 | |
1184 if (str->type != CPP_STRING) | |
1185 cpp_error (pfile, CPP_DL_ERROR, "invalid #%s directive", | |
1186 pfile->directive->name); | |
1187 else if (pfile->cb.ident) | |
1188 pfile->cb.ident (pfile, pfile->directive_line, &str->val.str); | |
1189 | |
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1190 check_eol (pfile, false); |
0 | 1191 } |
1192 | |
1193 /* Lookup a PRAGMA name in a singly-linked CHAIN. Returns the | |
1194 matching entry, or NULL if none is found. The returned entry could | |
1195 be the start of a namespace chain, or a pragma. */ | |
1196 static struct pragma_entry * | |
1197 lookup_pragma_entry (struct pragma_entry *chain, const cpp_hashnode *pragma) | |
1198 { | |
1199 while (chain && chain->pragma != pragma) | |
1200 chain = chain->next; | |
1201 | |
1202 return chain; | |
1203 } | |
1204 | |
1205 /* Create and insert a blank pragma entry at the beginning of a | |
1206 singly-linked CHAIN. */ | |
1207 static struct pragma_entry * | |
1208 new_pragma_entry (cpp_reader *pfile, struct pragma_entry **chain) | |
1209 { | |
1210 struct pragma_entry *new_entry; | |
1211 | |
1212 new_entry = (struct pragma_entry *) | |
1213 _cpp_aligned_alloc (pfile, sizeof (struct pragma_entry)); | |
1214 | |
1215 memset (new_entry, 0, sizeof (struct pragma_entry)); | |
1216 new_entry->next = *chain; | |
1217 | |
1218 *chain = new_entry; | |
1219 return new_entry; | |
1220 } | |
1221 | |
1222 /* Register a pragma NAME in namespace SPACE. If SPACE is null, it | |
1223 goes in the global namespace. */ | |
1224 static struct pragma_entry * | |
1225 register_pragma_1 (cpp_reader *pfile, const char *space, const char *name, | |
1226 bool allow_name_expansion) | |
1227 { | |
1228 struct pragma_entry **chain = &pfile->pragmas; | |
1229 struct pragma_entry *entry; | |
1230 const cpp_hashnode *node; | |
1231 | |
1232 if (space) | |
1233 { | |
1234 node = cpp_lookup (pfile, UC space, strlen (space)); | |
1235 entry = lookup_pragma_entry (*chain, node); | |
1236 if (!entry) | |
1237 { | |
1238 entry = new_pragma_entry (pfile, chain); | |
1239 entry->pragma = node; | |
1240 entry->is_nspace = true; | |
1241 entry->allow_expansion = allow_name_expansion; | |
1242 } | |
1243 else if (!entry->is_nspace) | |
1244 goto clash; | |
1245 else if (entry->allow_expansion != allow_name_expansion) | |
1246 { | |
1247 cpp_error (pfile, CPP_DL_ICE, | |
1248 "registering pragmas in namespace \"%s\" with mismatched " | |
1249 "name expansion", space); | |
1250 return NULL; | |
1251 } | |
1252 chain = &entry->u.space; | |
1253 } | |
1254 else if (allow_name_expansion) | |
1255 { | |
1256 cpp_error (pfile, CPP_DL_ICE, | |
1257 "registering pragma \"%s\" with name expansion " | |
1258 "and no namespace", name); | |
1259 return NULL; | |
1260 } | |
1261 | |
1262 /* Check for duplicates. */ | |
1263 node = cpp_lookup (pfile, UC name, strlen (name)); | |
1264 entry = lookup_pragma_entry (*chain, node); | |
1265 if (entry == NULL) | |
1266 { | |
1267 entry = new_pragma_entry (pfile, chain); | |
1268 entry->pragma = node; | |
1269 return entry; | |
1270 } | |
1271 | |
1272 if (entry->is_nspace) | |
1273 clash: | |
1274 cpp_error (pfile, CPP_DL_ICE, | |
1275 "registering \"%s\" as both a pragma and a pragma namespace", | |
1276 NODE_NAME (node)); | |
1277 else if (space) | |
1278 cpp_error (pfile, CPP_DL_ICE, "#pragma %s %s is already registered", | |
1279 space, name); | |
1280 else | |
1281 cpp_error (pfile, CPP_DL_ICE, "#pragma %s is already registered", name); | |
1282 | |
1283 return NULL; | |
1284 } | |
1285 | |
1286 /* Register a cpplib internal pragma SPACE NAME with HANDLER. */ | |
1287 static void | |
1288 register_pragma_internal (cpp_reader *pfile, const char *space, | |
1289 const char *name, pragma_cb handler) | |
1290 { | |
1291 struct pragma_entry *entry; | |
1292 | |
1293 entry = register_pragma_1 (pfile, space, name, false); | |
1294 entry->is_internal = true; | |
1295 entry->u.handler = handler; | |
1296 } | |
1297 | |
1298 /* Register a pragma NAME in namespace SPACE. If SPACE is null, it | |
1299 goes in the global namespace. HANDLER is the handler it will call, | |
1300 which must be non-NULL. If ALLOW_EXPANSION is set, allow macro | |
1301 expansion while parsing pragma NAME. This function is exported | |
1302 from libcpp. */ | |
1303 void | |
1304 cpp_register_pragma (cpp_reader *pfile, const char *space, const char *name, | |
1305 pragma_cb handler, bool allow_expansion) | |
1306 { | |
1307 struct pragma_entry *entry; | |
1308 | |
1309 if (!handler) | |
1310 { | |
1311 cpp_error (pfile, CPP_DL_ICE, "registering pragma with NULL handler"); | |
1312 return; | |
1313 } | |
1314 | |
1315 entry = register_pragma_1 (pfile, space, name, false); | |
1316 if (entry) | |
1317 { | |
1318 entry->allow_expansion = allow_expansion; | |
1319 entry->u.handler = handler; | |
1320 } | |
1321 } | |
1322 | |
1323 /* Similarly, but create mark the pragma for deferred processing. | |
1324 When found, a CPP_PRAGMA token will be insertted into the stream | |
1325 with IDENT in the token->u.pragma slot. */ | |
1326 void | |
1327 cpp_register_deferred_pragma (cpp_reader *pfile, const char *space, | |
1328 const char *name, unsigned int ident, | |
1329 bool allow_expansion, bool allow_name_expansion) | |
1330 { | |
1331 struct pragma_entry *entry; | |
1332 | |
1333 entry = register_pragma_1 (pfile, space, name, allow_name_expansion); | |
1334 if (entry) | |
1335 { | |
1336 entry->is_deferred = true; | |
1337 entry->allow_expansion = allow_expansion; | |
1338 entry->u.ident = ident; | |
1339 } | |
1340 } | |
1341 | |
1342 /* Register the pragmas the preprocessor itself handles. */ | |
1343 void | |
1344 _cpp_init_internal_pragmas (cpp_reader *pfile) | |
1345 { | |
1346 /* Pragmas in the global namespace. */ | |
1347 register_pragma_internal (pfile, 0, "once", do_pragma_once); | |
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1348 register_pragma_internal (pfile, 0, "push_macro", do_pragma_push_macro); |
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1349 register_pragma_internal (pfile, 0, "pop_macro", do_pragma_pop_macro); |
0 | 1350 |
1351 /* New GCC-specific pragmas should be put in the GCC namespace. */ | |
1352 register_pragma_internal (pfile, "GCC", "poison", do_pragma_poison); | |
1353 register_pragma_internal (pfile, "GCC", "system_header", | |
1354 do_pragma_system_header); | |
1355 register_pragma_internal (pfile, "GCC", "dependency", do_pragma_dependency); | |
111 | 1356 register_pragma_internal (pfile, "GCC", "warning", do_pragma_warning); |
1357 register_pragma_internal (pfile, "GCC", "error", do_pragma_error); | |
0 | 1358 } |
1359 | |
1360 /* Return the number of registered pragmas in PE. */ | |
1361 | |
1362 static int | |
1363 count_registered_pragmas (struct pragma_entry *pe) | |
1364 { | |
1365 int ct = 0; | |
1366 for (; pe != NULL; pe = pe->next) | |
1367 { | |
1368 if (pe->is_nspace) | |
1369 ct += count_registered_pragmas (pe->u.space); | |
1370 ct++; | |
1371 } | |
1372 return ct; | |
1373 } | |
1374 | |
1375 /* Save into SD the names of the registered pragmas referenced by PE, | |
1376 and return a pointer to the next free space in SD. */ | |
1377 | |
1378 static char ** | |
1379 save_registered_pragmas (struct pragma_entry *pe, char **sd) | |
1380 { | |
1381 for (; pe != NULL; pe = pe->next) | |
1382 { | |
1383 if (pe->is_nspace) | |
1384 sd = save_registered_pragmas (pe->u.space, sd); | |
1385 *sd++ = (char *) xmemdup (HT_STR (&pe->pragma->ident), | |
1386 HT_LEN (&pe->pragma->ident), | |
1387 HT_LEN (&pe->pragma->ident) + 1); | |
1388 } | |
1389 return sd; | |
1390 } | |
1391 | |
1392 /* Return a newly-allocated array which saves the names of the | |
1393 registered pragmas. */ | |
1394 | |
1395 char ** | |
1396 _cpp_save_pragma_names (cpp_reader *pfile) | |
1397 { | |
1398 int ct = count_registered_pragmas (pfile->pragmas); | |
1399 char **result = XNEWVEC (char *, ct); | |
1400 (void) save_registered_pragmas (pfile->pragmas, result); | |
1401 return result; | |
1402 } | |
1403 | |
1404 /* Restore from SD the names of the registered pragmas referenced by PE, | |
1405 and return a pointer to the next unused name in SD. */ | |
1406 | |
1407 static char ** | |
1408 restore_registered_pragmas (cpp_reader *pfile, struct pragma_entry *pe, | |
1409 char **sd) | |
1410 { | |
1411 for (; pe != NULL; pe = pe->next) | |
1412 { | |
1413 if (pe->is_nspace) | |
1414 sd = restore_registered_pragmas (pfile, pe->u.space, sd); | |
1415 pe->pragma = cpp_lookup (pfile, UC *sd, strlen (*sd)); | |
1416 free (*sd); | |
1417 sd++; | |
1418 } | |
1419 return sd; | |
1420 } | |
1421 | |
1422 /* Restore the names of the registered pragmas from SAVED. */ | |
1423 | |
1424 void | |
1425 _cpp_restore_pragma_names (cpp_reader *pfile, char **saved) | |
1426 { | |
1427 (void) restore_registered_pragmas (pfile, pfile->pragmas, saved); | |
1428 free (saved); | |
1429 } | |
1430 | |
1431 /* Pragmata handling. We handle some, and pass the rest on to the | |
1432 front end. C99 defines three pragmas and says that no macro | |
1433 expansion is to be performed on them; whether or not macro | |
1434 expansion happens for other pragmas is implementation defined. | |
1435 This implementation allows for a mix of both, since GCC did not | |
1436 traditionally macro expand its (few) pragmas, whereas OpenMP | |
1437 specifies that macro expansion should happen. */ | |
1438 static void | |
1439 do_pragma (cpp_reader *pfile) | |
1440 { | |
1441 const struct pragma_entry *p = NULL; | |
111 | 1442 const cpp_token *token, *pragma_token; |
1443 source_location pragma_token_virt_loc = 0; | |
0 | 1444 cpp_token ns_token; |
1445 unsigned int count = 1; | |
1446 | |
1447 pfile->state.prevent_expansion++; | |
1448 | |
111 | 1449 pragma_token = token = cpp_get_token_with_location (pfile, |
1450 &pragma_token_virt_loc); | |
0 | 1451 ns_token = *token; |
1452 if (token->type == CPP_NAME) | |
1453 { | |
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
|
1454 p = lookup_pragma_entry (pfile->pragmas, token->val.node.node); |
0 | 1455 if (p && p->is_nspace) |
1456 { | |
1457 bool allow_name_expansion = p->allow_expansion; | |
1458 if (allow_name_expansion) | |
1459 pfile->state.prevent_expansion--; | |
111 | 1460 |
0 | 1461 token = cpp_get_token (pfile); |
1462 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
|
1463 p = lookup_pragma_entry (p->u.space, token->val.node.node); |
0 | 1464 else |
1465 p = NULL; | |
1466 if (allow_name_expansion) | |
1467 pfile->state.prevent_expansion++; | |
1468 count = 2; | |
1469 } | |
1470 } | |
1471 | |
1472 if (p) | |
1473 { | |
1474 if (p->is_deferred) | |
1475 { | |
111 | 1476 pfile->directive_result.src_loc = pragma_token_virt_loc; |
0 | 1477 pfile->directive_result.type = CPP_PRAGMA; |
1478 pfile->directive_result.flags = pragma_token->flags; | |
1479 pfile->directive_result.val.pragma = p->u.ident; | |
1480 pfile->state.in_deferred_pragma = true; | |
1481 pfile->state.pragma_allow_expansion = p->allow_expansion; | |
1482 if (!p->allow_expansion) | |
1483 pfile->state.prevent_expansion++; | |
1484 } | |
1485 else | |
1486 { | |
1487 /* Since the handler below doesn't get the line number, that | |
1488 it might need for diagnostics, make sure it has the right | |
1489 numbers in place. */ | |
1490 if (pfile->cb.line_change) | |
1491 (*pfile->cb.line_change) (pfile, pragma_token, false); | |
1492 if (p->allow_expansion) | |
1493 pfile->state.prevent_expansion--; | |
1494 (*p->u.handler) (pfile); | |
1495 if (p->allow_expansion) | |
1496 pfile->state.prevent_expansion++; | |
1497 } | |
1498 } | |
1499 else if (pfile->cb.def_pragma) | |
1500 { | |
1501 if (count == 1 || pfile->context->prev == NULL) | |
1502 _cpp_backup_tokens (pfile, count); | |
1503 else | |
1504 { | |
1505 /* Invalid name comes from macro expansion, _cpp_backup_tokens | |
1506 won't allow backing 2 tokens. */ | |
1507 /* ??? The token buffer is leaked. Perhaps if def_pragma hook | |
1508 reads both tokens, we could perhaps free it, but if it doesn't, | |
1509 we don't know the exact lifespan. */ | |
1510 cpp_token *toks = XNEWVEC (cpp_token, 2); | |
1511 toks[0] = ns_token; | |
1512 toks[0].flags |= NO_EXPAND; | |
1513 toks[1] = *token; | |
1514 toks[1].flags |= NO_EXPAND; | |
1515 _cpp_push_token_context (pfile, NULL, toks, 2); | |
1516 } | |
1517 pfile->cb.def_pragma (pfile, pfile->directive_line); | |
1518 } | |
1519 | |
1520 pfile->state.prevent_expansion--; | |
1521 } | |
1522 | |
1523 /* Handle #pragma once. */ | |
1524 static void | |
1525 do_pragma_once (cpp_reader *pfile) | |
1526 { | |
1527 if (cpp_in_primary_file (pfile)) | |
1528 cpp_error (pfile, CPP_DL_WARNING, "#pragma once in main file"); | |
1529 | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1530 check_eol (pfile, false); |
0 | 1531 _cpp_mark_file_once_only (pfile, pfile->buffer->file); |
1532 } | |
1533 | |
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
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parents:
0
diff
changeset
|
1534 /* Handle #pragma push_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
|
1535 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
|
1536 do_pragma_push_macro (cpp_reader *pfile) |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1537 { |
67
f6334be47118
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63
diff
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|
1538 cpp_hashnode *node; |
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update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
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|
1539 size_t defnlen; |
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update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
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63
diff
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|
1540 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
|
1541 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
|
1542 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
|
1543 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
|
1544 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
|
1545 |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1546 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
|
1547 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
|
1548 { |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1549 source_location src_loc = pfile->cur_token[-1].src_loc; |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1550 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
|
1551 "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
|
1552 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
|
1553 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
|
1554 return; |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1555 } |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1556 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
|
1557 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
|
1558 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
|
1559 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
|
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 /* 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
|
1562 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
|
1563 src++; |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1564 *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
|
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 *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
|
1567 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
|
1568 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
|
1569 c = XNEW (struct def_pragma_macro); |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1570 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
|
1571 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
|
1572 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
|
1573 c->next = pfile->pushed_macros; |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
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63
diff
changeset
|
1574 node = _cpp_lex_identifier (pfile, c->name); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1575 if (node->type == NT_VOID) |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1576 c->is_undef = 1; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1577 else |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1578 { |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1579 defn = cpp_macro_definition (pfile, node); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1580 defnlen = ustrlen (defn); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1581 c->definition = XNEWVEC (uchar, defnlen + 2); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1582 c->definition[defnlen] = '\n'; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1583 c->definition[defnlen + 1] = 0; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1584 c->line = node->value.macro->line; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1585 c->syshdr = node->value.macro->syshdr; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1586 c->used = node->value.macro->used; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1587 memcpy (c->definition, defn, defnlen); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1588 } |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
1589 |
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1590 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
|
1591 } |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1592 |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1593 /* 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
|
1594 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
|
1595 do_pragma_pop_macro (cpp_reader *pfile) |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1596 { |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1597 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
|
1598 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
|
1599 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
|
1600 struct def_pragma_macro *l = NULL, *c = pfile->pushed_macros; |
3bfb6c00c1e0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1601 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
|
1602 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
|
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 source_location src_loc = pfile->cur_token[-1].src_loc; |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1605 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
|
1606 "invalid #pragma pop_macro directive"); |
55
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parents:
47
diff
changeset
|
1607 check_eol (pfile, false); |
47
3bfb6c00c1e0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1608 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
|
1609 return; |
3bfb6c00c1e0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1610 } |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1611 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
|
1612 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
|
1613 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
|
1614 while (src < limit) |
3bfb6c00c1e0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1615 { |
3bfb6c00c1e0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1616 /* We know there is a character following the backslash. */ |
3bfb6c00c1e0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1617 if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) |
3bfb6c00c1e0
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1618 src++; |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1619 *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
|
1620 } |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1621 *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
|
1622 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
|
1623 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
|
1624 |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1625 while (c != NULL) |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1626 { |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1627 if (!strcmp (c->name, macroname)) |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1628 { |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1629 if (!l) |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1630 pfile->pushed_macros = c->next; |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1631 else |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1632 l->next = c->next; |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1633 cpp_pop_definition (pfile, c); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
1634 free (c->definition); |
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1635 free (c->name); |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1636 free (c); |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1637 break; |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1638 } |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1639 l = c; |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1640 c = c->next; |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1641 } |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1642 } |
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1643 |
0 | 1644 /* Handle #pragma GCC poison, to poison one or more identifiers so |
1645 that the lexer produces a hard error for each subsequent usage. */ | |
1646 static void | |
1647 do_pragma_poison (cpp_reader *pfile) | |
1648 { | |
1649 const cpp_token *tok; | |
1650 cpp_hashnode *hp; | |
1651 | |
1652 pfile->state.poisoned_ok = 1; | |
1653 for (;;) | |
1654 { | |
1655 tok = _cpp_lex_token (pfile); | |
1656 if (tok->type == CPP_EOF) | |
1657 break; | |
1658 if (tok->type != CPP_NAME) | |
1659 { | |
1660 cpp_error (pfile, CPP_DL_ERROR, | |
1661 "invalid #pragma GCC poison directive"); | |
1662 break; | |
1663 } | |
1664 | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1665 hp = tok->val.node.node; |
0 | 1666 if (hp->flags & NODE_POISONED) |
1667 continue; | |
1668 | |
1669 if (hp->type == NT_MACRO) | |
1670 cpp_error (pfile, CPP_DL_WARNING, "poisoning existing macro \"%s\"", | |
1671 NODE_NAME (hp)); | |
1672 _cpp_free_definition (hp); | |
1673 hp->flags |= NODE_POISONED | NODE_DIAGNOSTIC; | |
1674 } | |
1675 pfile->state.poisoned_ok = 0; | |
1676 } | |
1677 | |
1678 /* Mark the current header as a system header. This will suppress | |
1679 some categories of warnings (notably those from -pedantic). It is | |
1680 intended for use in system libraries that cannot be implemented in | |
1681 conforming C, but cannot be certain that their headers appear in a | |
1682 system include directory. To prevent abuse, it is rejected in the | |
1683 primary source file. */ | |
1684 static void | |
1685 do_pragma_system_header (cpp_reader *pfile) | |
1686 { | |
1687 if (cpp_in_primary_file (pfile)) | |
1688 cpp_error (pfile, CPP_DL_WARNING, | |
1689 "#pragma system_header ignored outside include file"); | |
1690 else | |
1691 { | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1692 check_eol (pfile, false); |
0 | 1693 skip_rest_of_line (pfile); |
1694 cpp_make_system_header (pfile, 1, 0); | |
1695 } | |
1696 } | |
1697 | |
1698 /* Check the modified date of the current include file against a specified | |
1699 file. Issue a diagnostic, if the specified file is newer. We use this to | |
1700 determine if a fixed header should be refixed. */ | |
1701 static void | |
1702 do_pragma_dependency (cpp_reader *pfile) | |
1703 { | |
1704 const char *fname; | |
1705 int angle_brackets, ordering; | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1706 source_location location; |
0 | 1707 |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1708 fname = parse_include (pfile, &angle_brackets, NULL, &location); |
0 | 1709 if (!fname) |
1710 return; | |
1711 | |
1712 ordering = _cpp_compare_file_date (pfile, fname, angle_brackets); | |
1713 if (ordering < 0) | |
1714 cpp_error (pfile, CPP_DL_WARNING, "cannot find source file %s", fname); | |
1715 else if (ordering > 0) | |
1716 { | |
1717 cpp_error (pfile, CPP_DL_WARNING, | |
1718 "current file is older than %s", fname); | |
1719 if (cpp_get_token (pfile)->type != CPP_EOF) | |
1720 { | |
1721 _cpp_backup_tokens (pfile, 1); | |
63
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
1722 do_diagnostic (pfile, CPP_DL_WARNING, 0, 0); |
0 | 1723 } |
1724 } | |
1725 | |
1726 free ((void *) fname); | |
1727 } | |
1728 | |
111 | 1729 /* Issue a diagnostic with the message taken from the pragma. If |
1730 ERROR is true, the diagnostic is a warning, otherwise, it is an | |
1731 error. */ | |
1732 static void | |
1733 do_pragma_warning_or_error (cpp_reader *pfile, bool error) | |
1734 { | |
1735 const cpp_token *tok = _cpp_lex_token (pfile); | |
1736 cpp_string str; | |
1737 if (tok->type != CPP_STRING | |
1738 || !cpp_interpret_string_notranslate (pfile, &tok->val.str, 1, &str, | |
1739 CPP_STRING) | |
1740 || str.len == 0) | |
1741 { | |
1742 cpp_error (pfile, CPP_DL_ERROR, "invalid \"#pragma GCC %s\" directive", | |
1743 error ? "error" : "warning"); | |
1744 return; | |
1745 } | |
1746 cpp_error (pfile, error ? CPP_DL_ERROR : CPP_DL_WARNING, | |
1747 "%s", str.text); | |
1748 free ((void *)str.text); | |
1749 } | |
1750 | |
1751 /* Issue a warning diagnostic. */ | |
1752 static void | |
1753 do_pragma_warning (cpp_reader *pfile) | |
1754 { | |
1755 do_pragma_warning_or_error (pfile, false); | |
1756 } | |
1757 | |
1758 /* Issue an error diagnostic. */ | |
1759 static void | |
1760 do_pragma_error (cpp_reader *pfile) | |
1761 { | |
1762 do_pragma_warning_or_error (pfile, true); | |
1763 } | |
1764 | |
0 | 1765 /* Get a token but skip padding. */ |
1766 static const cpp_token * | |
1767 get_token_no_padding (cpp_reader *pfile) | |
1768 { | |
1769 for (;;) | |
1770 { | |
1771 const cpp_token *result = cpp_get_token (pfile); | |
1772 if (result->type != CPP_PADDING) | |
1773 return result; | |
1774 } | |
1775 } | |
1776 | |
1777 /* Check syntax is "(string-literal)". Returns the string on success, | |
1778 or NULL on failure. */ | |
1779 static const cpp_token * | |
1780 get__Pragma_string (cpp_reader *pfile) | |
1781 { | |
1782 const cpp_token *string; | |
1783 const cpp_token *paren; | |
1784 | |
1785 paren = get_token_no_padding (pfile); | |
1786 if (paren->type == CPP_EOF) | |
1787 _cpp_backup_tokens (pfile, 1); | |
1788 if (paren->type != CPP_OPEN_PAREN) | |
1789 return NULL; | |
1790 | |
1791 string = get_token_no_padding (pfile); | |
1792 if (string->type == CPP_EOF) | |
1793 _cpp_backup_tokens (pfile, 1); | |
1794 if (string->type != CPP_STRING && string->type != CPP_WSTRING | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1795 && string->type != CPP_STRING32 && string->type != CPP_STRING16 |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
1796 && string->type != CPP_UTF8STRING) |
0 | 1797 return NULL; |
1798 | |
1799 paren = get_token_no_padding (pfile); | |
1800 if (paren->type == CPP_EOF) | |
1801 _cpp_backup_tokens (pfile, 1); | |
1802 if (paren->type != CPP_CLOSE_PAREN) | |
1803 return NULL; | |
1804 | |
1805 return string; | |
1806 } | |
1807 | |
1808 /* Destringize IN into a temporary buffer, by removing the first \ of | |
1809 \" and \\ sequences, and process the result as a #pragma directive. */ | |
1810 static void | |
111 | 1811 destringize_and_run (cpp_reader *pfile, const cpp_string *in, |
1812 source_location expansion_loc) | |
0 | 1813 { |
1814 const unsigned char *src, *limit; | |
1815 char *dest, *result; | |
1816 cpp_context *saved_context; | |
1817 cpp_token *saved_cur_token; | |
1818 tokenrun *saved_cur_run; | |
1819 cpp_token *toks; | |
1820 int count; | |
1821 const struct directive *save_directive; | |
1822 | |
1823 dest = result = (char *) alloca (in->len - 1); | |
1824 src = in->text + 1 + (in->text[0] == 'L'); | |
1825 limit = in->text + in->len - 1; | |
1826 while (src < limit) | |
1827 { | |
1828 /* We know there is a character following the backslash. */ | |
1829 if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
1830 src++; | |
1831 *dest++ = *src++; | |
1832 } | |
1833 *dest = '\n'; | |
1834 | |
1835 /* Ugh; an awful kludge. We are really not set up to be lexing | |
1836 tokens when in the middle of a macro expansion. Use a new | |
1837 context to force cpp_get_token to lex, and so skip_rest_of_line | |
1838 doesn't go beyond the end of the text. Also, remember the | |
1839 current lexing position so we can return to it later. | |
1840 | |
1841 Something like line-at-a-time lexing should remove the need for | |
1842 this. */ | |
1843 saved_context = pfile->context; | |
1844 saved_cur_token = pfile->cur_token; | |
1845 saved_cur_run = pfile->cur_run; | |
1846 | |
111 | 1847 pfile->context = XCNEW (cpp_context); |
0 | 1848 |
1849 /* Inline run_directive, since we need to delay the _cpp_pop_buffer | |
1850 until we've read all of the tokens that we want. */ | |
1851 cpp_push_buffer (pfile, (const uchar *) result, dest - result, | |
1852 /* from_stage3 */ true); | |
1853 /* ??? Antique Disgusting Hack. What does this do? */ | |
1854 if (pfile->buffer->prev) | |
1855 pfile->buffer->file = pfile->buffer->prev->file; | |
1856 | |
1857 start_directive (pfile); | |
1858 _cpp_clean_line (pfile); | |
1859 save_directive = pfile->directive; | |
1860 pfile->directive = &dtable[T_PRAGMA]; | |
1861 do_pragma (pfile); | |
1862 end_directive (pfile, 1); | |
1863 pfile->directive = save_directive; | |
1864 | |
1865 /* We always insert at least one token, the directive result. It'll | |
1866 either be a CPP_PADDING or a CPP_PRAGMA. In the later case, we | |
1867 need to insert *all* of the tokens, including the CPP_PRAGMA_EOL. */ | |
1868 | |
1869 /* If we're not handling the pragma internally, read all of the tokens from | |
1870 the string buffer now, while the string buffer is still installed. */ | |
1871 /* ??? Note that the token buffer allocated here is leaked. It's not clear | |
1872 to me what the true lifespan of the tokens are. It would appear that | |
1873 the lifespan is the entire parse of the main input stream, in which case | |
1874 this may not be wrong. */ | |
1875 if (pfile->directive_result.type == CPP_PRAGMA) | |
1876 { | |
1877 int maxcount; | |
1878 | |
1879 count = 1; | |
1880 maxcount = 50; | |
1881 toks = XNEWVEC (cpp_token, maxcount); | |
1882 toks[0] = pfile->directive_result; | |
1883 | |
1884 do | |
1885 { | |
1886 if (count == maxcount) | |
1887 { | |
1888 maxcount = maxcount * 3 / 2; | |
1889 toks = XRESIZEVEC (cpp_token, toks, maxcount); | |
1890 } | |
1891 toks[count] = *cpp_get_token (pfile); | |
111 | 1892 /* _Pragma is a builtin, so we're not within a macro-map, and so |
1893 the token locations are set to bogus ordinary locations | |
1894 near to, but after that of the "_Pragma". | |
1895 Paper over this by setting them equal to the location of the | |
1896 _Pragma itself (PR preprocessor/69126). */ | |
1897 toks[count].src_loc = expansion_loc; | |
0 | 1898 /* Macros have been already expanded by cpp_get_token |
1899 if the pragma allowed expansion. */ | |
1900 toks[count++].flags |= NO_EXPAND; | |
1901 } | |
1902 while (toks[count-1].type != CPP_PRAGMA_EOL); | |
1903 } | |
1904 else | |
1905 { | |
1906 count = 1; | |
1907 toks = XNEW (cpp_token); | |
1908 toks[0] = pfile->directive_result; | |
1909 | |
1910 /* If we handled the entire pragma internally, make sure we get the | |
1911 line number correct for the next token. */ | |
1912 if (pfile->cb.line_change) | |
1913 pfile->cb.line_change (pfile, pfile->cur_token, false); | |
1914 } | |
1915 | |
1916 /* Finish inlining run_directive. */ | |
1917 pfile->buffer->file = NULL; | |
1918 _cpp_pop_buffer (pfile); | |
1919 | |
1920 /* Reset the old macro state before ... */ | |
1921 XDELETE (pfile->context); | |
1922 pfile->context = saved_context; | |
1923 pfile->cur_token = saved_cur_token; | |
1924 pfile->cur_run = saved_cur_run; | |
1925 | |
1926 /* ... inserting the new tokens we collected. */ | |
1927 _cpp_push_token_context (pfile, NULL, toks, count); | |
1928 } | |
1929 | |
1930 /* Handle the _Pragma operator. Return 0 on error, 1 if ok. */ | |
1931 int | |
111 | 1932 _cpp_do__Pragma (cpp_reader *pfile, source_location expansion_loc) |
0 | 1933 { |
1934 const cpp_token *string = get__Pragma_string (pfile); | |
1935 pfile->directive_result.type = CPP_PADDING; | |
1936 | |
1937 if (string) | |
1938 { | |
111 | 1939 destringize_and_run (pfile, &string->val.str, expansion_loc); |
0 | 1940 return 1; |
1941 } | |
1942 cpp_error (pfile, CPP_DL_ERROR, | |
1943 "_Pragma takes a parenthesized string literal"); | |
1944 return 0; | |
1945 } | |
1946 | |
1947 /* Handle #ifdef. */ | |
1948 static void | |
1949 do_ifdef (cpp_reader *pfile) | |
1950 { | |
1951 int skip = 1; | |
1952 | |
1953 if (! pfile->state.skipping) | |
1954 { | |
1955 cpp_hashnode *node = lex_macro_node (pfile, false); | |
1956 | |
1957 if (node) | |
1958 { | |
111 | 1959 /* Do not treat conditional macros as being defined. This is due to |
1960 the powerpc and spu ports using conditional macros for 'vector', | |
1961 'bool', and 'pixel' to act as conditional keywords. This messes | |
1962 up tests like #ifndef bool. */ | |
1963 skip = (node->type != NT_MACRO | |
1964 || ((node->flags & NODE_CONDITIONAL) != 0)); | |
0 | 1965 _cpp_mark_macro_used (node); |
1966 if (!(node->flags & NODE_USED)) | |
1967 { | |
1968 node->flags |= NODE_USED; | |
1969 if (node->type == NT_MACRO) | |
1970 { | |
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1971 if ((node->flags & NODE_BUILTIN) |
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1972 && pfile->cb.user_builtin_macro) |
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1973 pfile->cb.user_builtin_macro (pfile, node); |
0 | 1974 if (pfile->cb.used_define) |
1975 pfile->cb.used_define (pfile, pfile->directive_line, node); | |
1976 } | |
1977 else | |
1978 { | |
1979 if (pfile->cb.used_undef) | |
1980 pfile->cb.used_undef (pfile, pfile->directive_line, node); | |
1981 } | |
1982 } | |
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1983 if (pfile->cb.used) |
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1984 pfile->cb.used (pfile, pfile->directive_line, node); |
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1985 check_eol (pfile, false); |
0 | 1986 } |
1987 } | |
1988 | |
1989 push_conditional (pfile, skip, T_IFDEF, 0); | |
1990 } | |
1991 | |
1992 /* Handle #ifndef. */ | |
1993 static void | |
1994 do_ifndef (cpp_reader *pfile) | |
1995 { | |
1996 int skip = 1; | |
1997 cpp_hashnode *node = 0; | |
1998 | |
1999 if (! pfile->state.skipping) | |
2000 { | |
2001 node = lex_macro_node (pfile, false); | |
2002 | |
2003 if (node) | |
2004 { | |
111 | 2005 /* Do not treat conditional macros as being defined. This is due to |
2006 the powerpc and spu ports using conditional macros for 'vector', | |
2007 'bool', and 'pixel' to act as conditional keywords. This messes | |
2008 up tests like #ifndef bool. */ | |
2009 skip = (node->type == NT_MACRO | |
2010 && ((node->flags & NODE_CONDITIONAL) == 0)); | |
0 | 2011 _cpp_mark_macro_used (node); |
2012 if (!(node->flags & NODE_USED)) | |
2013 { | |
2014 node->flags |= NODE_USED; | |
2015 if (node->type == NT_MACRO) | |
2016 { | |
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2017 if ((node->flags & NODE_BUILTIN) |
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2018 && pfile->cb.user_builtin_macro) |
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2019 pfile->cb.user_builtin_macro (pfile, node); |
0 | 2020 if (pfile->cb.used_define) |
2021 pfile->cb.used_define (pfile, pfile->directive_line, node); | |
2022 } | |
2023 else | |
2024 { | |
2025 if (pfile->cb.used_undef) | |
2026 pfile->cb.used_undef (pfile, pfile->directive_line, node); | |
2027 } | |
2028 } | |
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2029 if (pfile->cb.used) |
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2030 pfile->cb.used (pfile, pfile->directive_line, node); |
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2031 check_eol (pfile, false); |
0 | 2032 } |
2033 } | |
2034 | |
2035 push_conditional (pfile, skip, T_IFNDEF, node); | |
2036 } | |
2037 | |
2038 /* _cpp_parse_expr puts a macro in a "#if !defined ()" expression in | |
2039 pfile->mi_ind_cmacro so we can handle multiple-include | |
2040 optimizations. If macro expansion occurs in the expression, we | |
2041 cannot treat it as a controlling conditional, since the expansion | |
2042 could change in the future. That is handled by cpp_get_token. */ | |
2043 static void | |
2044 do_if (cpp_reader *pfile) | |
2045 { | |
2046 int skip = 1; | |
2047 | |
2048 if (! pfile->state.skipping) | |
2049 skip = _cpp_parse_expr (pfile, true) == false; | |
2050 | |
2051 push_conditional (pfile, skip, T_IF, pfile->mi_ind_cmacro); | |
2052 } | |
2053 | |
2054 /* Flip skipping state if appropriate and continue without changing | |
2055 if_stack; this is so that the error message for missing #endif's | |
2056 etc. will point to the original #if. */ | |
2057 static void | |
2058 do_else (cpp_reader *pfile) | |
2059 { | |
2060 cpp_buffer *buffer = pfile->buffer; | |
2061 struct if_stack *ifs = buffer->if_stack; | |
2062 | |
2063 if (ifs == NULL) | |
2064 cpp_error (pfile, CPP_DL_ERROR, "#else without #if"); | |
2065 else | |
2066 { | |
2067 if (ifs->type == T_ELSE) | |
2068 { | |
2069 cpp_error (pfile, CPP_DL_ERROR, "#else after #else"); | |
2070 cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
2071 "the conditional began here"); | |
2072 } | |
2073 ifs->type = T_ELSE; | |
2074 | |
2075 /* Skip any future (erroneous) #elses or #elifs. */ | |
2076 pfile->state.skipping = ifs->skip_elses; | |
2077 ifs->skip_elses = true; | |
2078 | |
2079 /* Invalidate any controlling macro. */ | |
2080 ifs->mi_cmacro = 0; | |
2081 | |
2082 /* Only check EOL if was not originally skipping. */ | |
2083 if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) | |
111 | 2084 check_eol_endif_labels (pfile); |
0 | 2085 } |
2086 } | |
2087 | |
2088 /* Handle a #elif directive by not changing if_stack either. See the | |
2089 comment above do_else. */ | |
2090 static void | |
2091 do_elif (cpp_reader *pfile) | |
2092 { | |
2093 cpp_buffer *buffer = pfile->buffer; | |
2094 struct if_stack *ifs = buffer->if_stack; | |
2095 | |
2096 if (ifs == NULL) | |
2097 cpp_error (pfile, CPP_DL_ERROR, "#elif without #if"); | |
2098 else | |
2099 { | |
2100 if (ifs->type == T_ELSE) | |
2101 { | |
2102 cpp_error (pfile, CPP_DL_ERROR, "#elif after #else"); | |
2103 cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
2104 "the conditional began here"); | |
2105 } | |
2106 ifs->type = T_ELIF; | |
2107 | |
111 | 2108 /* See DR#412: "Only the first group whose control condition |
2109 evaluates to true (nonzero) is processed; any following groups | |
2110 are skipped and their controlling directives are processed as | |
2111 if they were in a group that is skipped." */ | |
2112 if (ifs->skip_elses) | |
2113 pfile->state.skipping = 1; | |
2114 else | |
0 | 2115 { |
111 | 2116 pfile->state.skipping = ! _cpp_parse_expr (pfile, false); |
2117 ifs->skip_elses = ! pfile->state.skipping; | |
0 | 2118 } |
2119 | |
2120 /* Invalidate any controlling macro. */ | |
2121 ifs->mi_cmacro = 0; | |
2122 } | |
2123 } | |
2124 | |
2125 /* #endif pops the if stack and resets pfile->state.skipping. */ | |
2126 static void | |
2127 do_endif (cpp_reader *pfile) | |
2128 { | |
2129 cpp_buffer *buffer = pfile->buffer; | |
2130 struct if_stack *ifs = buffer->if_stack; | |
2131 | |
2132 if (ifs == NULL) | |
2133 cpp_error (pfile, CPP_DL_ERROR, "#endif without #if"); | |
2134 else | |
2135 { | |
2136 /* Only check EOL if was not originally skipping. */ | |
2137 if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) | |
111 | 2138 check_eol_endif_labels (pfile); |
0 | 2139 |
2140 /* If potential control macro, we go back outside again. */ | |
2141 if (ifs->next == 0 && ifs->mi_cmacro) | |
2142 { | |
2143 pfile->mi_valid = true; | |
2144 pfile->mi_cmacro = ifs->mi_cmacro; | |
2145 } | |
2146 | |
2147 buffer->if_stack = ifs->next; | |
2148 pfile->state.skipping = ifs->was_skipping; | |
2149 obstack_free (&pfile->buffer_ob, ifs); | |
2150 } | |
2151 } | |
2152 | |
2153 /* Push an if_stack entry for a preprocessor conditional, and set | |
2154 pfile->state.skipping to SKIP. If TYPE indicates the conditional | |
2155 is #if or #ifndef, CMACRO is a potentially controlling macro, and | |
2156 we need to check here that we are at the top of the file. */ | |
2157 static void | |
2158 push_conditional (cpp_reader *pfile, int skip, int type, | |
2159 const cpp_hashnode *cmacro) | |
2160 { | |
2161 struct if_stack *ifs; | |
2162 cpp_buffer *buffer = pfile->buffer; | |
2163 | |
2164 ifs = XOBNEW (&pfile->buffer_ob, struct if_stack); | |
2165 ifs->line = pfile->directive_line; | |
2166 ifs->next = buffer->if_stack; | |
2167 ifs->skip_elses = pfile->state.skipping || !skip; | |
2168 ifs->was_skipping = pfile->state.skipping; | |
2169 ifs->type = type; | |
2170 /* This condition is effectively a test for top-of-file. */ | |
2171 if (pfile->mi_valid && pfile->mi_cmacro == 0) | |
2172 ifs->mi_cmacro = cmacro; | |
2173 else | |
2174 ifs->mi_cmacro = 0; | |
2175 | |
2176 pfile->state.skipping = skip; | |
2177 buffer->if_stack = ifs; | |
2178 } | |
2179 | |
2180 /* Read the tokens of the answer into the macro pool, in a directive | |
2181 of type TYPE. Only commit the memory if we intend it as permanent | |
2182 storage, i.e. the #assert case. Returns 0 on success, and sets | |
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2183 ANSWERP to point to the answer. PRED_LOC is the location of the |
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2184 predicate. */ |
0 | 2185 static int |
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2186 parse_answer (cpp_reader *pfile, struct answer **answerp, int type, |
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2187 source_location pred_loc) |
0 | 2188 { |
2189 const cpp_token *paren; | |
2190 struct answer *answer; | |
2191 unsigned int acount; | |
2192 | |
2193 /* In a conditional, it is legal to not have an open paren. We | |
2194 should save the following token in this case. */ | |
2195 paren = cpp_get_token (pfile); | |
2196 | |
2197 /* If not a paren, see if we're OK. */ | |
2198 if (paren->type != CPP_OPEN_PAREN) | |
2199 { | |
2200 /* In a conditional no answer is a test for any answer. It | |
2201 could be followed by any token. */ | |
2202 if (type == T_IF) | |
2203 { | |
2204 _cpp_backup_tokens (pfile, 1); | |
2205 return 0; | |
2206 } | |
2207 | |
2208 /* #unassert with no answer is valid - it removes all answers. */ | |
2209 if (type == T_UNASSERT && paren->type == CPP_EOF) | |
2210 return 0; | |
2211 | |
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2212 cpp_error_with_line (pfile, CPP_DL_ERROR, pred_loc, 0, |
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2213 "missing '(' after predicate"); |
0 | 2214 return 1; |
2215 } | |
2216 | |
2217 for (acount = 0;; acount++) | |
2218 { | |
2219 size_t room_needed; | |
2220 const cpp_token *token = cpp_get_token (pfile); | |
2221 cpp_token *dest; | |
2222 | |
2223 if (token->type == CPP_CLOSE_PAREN) | |
2224 break; | |
2225 | |
2226 if (token->type == CPP_EOF) | |
2227 { | |
2228 cpp_error (pfile, CPP_DL_ERROR, "missing ')' to complete answer"); | |
2229 return 1; | |
2230 } | |
2231 | |
2232 /* struct answer includes the space for one token. */ | |
2233 room_needed = (sizeof (struct answer) + acount * sizeof (cpp_token)); | |
2234 | |
2235 if (BUFF_ROOM (pfile->a_buff) < room_needed) | |
2236 _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (struct answer)); | |
2237 | |
2238 dest = &((struct answer *) BUFF_FRONT (pfile->a_buff))->first[acount]; | |
2239 *dest = *token; | |
2240 | |
2241 /* Drop whitespace at start, for answer equivalence purposes. */ | |
2242 if (acount == 0) | |
2243 dest->flags &= ~PREV_WHITE; | |
2244 } | |
2245 | |
2246 if (acount == 0) | |
2247 { | |
2248 cpp_error (pfile, CPP_DL_ERROR, "predicate's answer is empty"); | |
2249 return 1; | |
2250 } | |
2251 | |
2252 answer = (struct answer *) BUFF_FRONT (pfile->a_buff); | |
2253 answer->count = acount; | |
2254 answer->next = NULL; | |
2255 *answerp = answer; | |
2256 | |
2257 return 0; | |
2258 } | |
2259 | |
2260 /* Parses an assertion directive of type TYPE, returning a pointer to | |
2261 the hash node of the predicate, or 0 on error. If an answer was | |
2262 supplied, it is placed in ANSWERP, otherwise it is set to 0. */ | |
2263 static cpp_hashnode * | |
2264 parse_assertion (cpp_reader *pfile, struct answer **answerp, int type) | |
2265 { | |
2266 cpp_hashnode *result = 0; | |
2267 const cpp_token *predicate; | |
2268 | |
2269 /* We don't expand predicates or answers. */ | |
2270 pfile->state.prevent_expansion++; | |
2271 | |
2272 *answerp = 0; | |
2273 predicate = cpp_get_token (pfile); | |
2274 if (predicate->type == CPP_EOF) | |
2275 cpp_error (pfile, CPP_DL_ERROR, "assertion without predicate"); | |
2276 else if (predicate->type != CPP_NAME) | |
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2277 cpp_error_with_line (pfile, CPP_DL_ERROR, predicate->src_loc, 0, |
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2278 "predicate must be an identifier"); |
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2279 else if (parse_answer (pfile, answerp, type, predicate->src_loc) == 0) |
0 | 2280 { |
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2281 unsigned int len = NODE_LEN (predicate->val.node.node); |
0 | 2282 unsigned char *sym = (unsigned char *) alloca (len + 1); |
2283 | |
2284 /* Prefix '#' to get it out of macro namespace. */ | |
2285 sym[0] = '#'; | |
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2286 memcpy (sym + 1, NODE_NAME (predicate->val.node.node), len); |
0 | 2287 result = cpp_lookup (pfile, sym, len + 1); |
2288 } | |
2289 | |
2290 pfile->state.prevent_expansion--; | |
2291 return result; | |
2292 } | |
2293 | |
2294 /* Returns a pointer to the pointer to CANDIDATE in the answer chain, | |
2295 or a pointer to NULL if the answer is not in the chain. */ | |
2296 static struct answer ** | |
2297 find_answer (cpp_hashnode *node, const struct answer *candidate) | |
2298 { | |
2299 unsigned int i; | |
2300 struct answer **result; | |
2301 | |
2302 for (result = &node->value.answers; *result; result = &(*result)->next) | |
2303 { | |
2304 struct answer *answer = *result; | |
2305 | |
2306 if (answer->count == candidate->count) | |
2307 { | |
2308 for (i = 0; i < answer->count; i++) | |
2309 if (! _cpp_equiv_tokens (&answer->first[i], &candidate->first[i])) | |
2310 break; | |
2311 | |
2312 if (i == answer->count) | |
2313 break; | |
2314 } | |
2315 } | |
2316 | |
2317 return result; | |
2318 } | |
2319 | |
2320 /* Test an assertion within a preprocessor conditional. Returns | |
2321 nonzero on failure, zero on success. On success, the result of | |
2322 the test is written into VALUE, otherwise the value 0. */ | |
2323 int | |
2324 _cpp_test_assertion (cpp_reader *pfile, unsigned int *value) | |
2325 { | |
2326 struct answer *answer; | |
2327 cpp_hashnode *node; | |
2328 | |
2329 node = parse_assertion (pfile, &answer, T_IF); | |
2330 | |
2331 /* For recovery, an erroneous assertion expression is handled as a | |
2332 failing assertion. */ | |
2333 *value = 0; | |
2334 | |
2335 if (node) | |
2336 *value = (node->type == NT_ASSERTION && | |
2337 (answer == 0 || *find_answer (node, answer) != 0)); | |
2338 else if (pfile->cur_token[-1].type == CPP_EOF) | |
2339 _cpp_backup_tokens (pfile, 1); | |
2340 | |
2341 /* We don't commit the memory for the answer - it's temporary only. */ | |
2342 return node == 0; | |
2343 } | |
2344 | |
2345 /* Handle #assert. */ | |
2346 static void | |
2347 do_assert (cpp_reader *pfile) | |
2348 { | |
2349 struct answer *new_answer; | |
2350 cpp_hashnode *node; | |
2351 | |
2352 node = parse_assertion (pfile, &new_answer, T_ASSERT); | |
2353 if (node) | |
2354 { | |
2355 size_t answer_size; | |
2356 | |
2357 /* Place the new answer in the answer list. First check there | |
2358 is not a duplicate. */ | |
2359 new_answer->next = 0; | |
2360 if (node->type == NT_ASSERTION) | |
2361 { | |
2362 if (*find_answer (node, new_answer)) | |
2363 { | |
2364 cpp_error (pfile, CPP_DL_WARNING, "\"%s\" re-asserted", | |
2365 NODE_NAME (node) + 1); | |
2366 return; | |
2367 } | |
2368 new_answer->next = node->value.answers; | |
2369 } | |
2370 | |
2371 answer_size = sizeof (struct answer) + ((new_answer->count - 1) | |
2372 * sizeof (cpp_token)); | |
2373 /* Commit or allocate storage for the object. */ | |
2374 if (pfile->hash_table->alloc_subobject) | |
2375 { | |
2376 struct answer *temp_answer = new_answer; | |
2377 new_answer = (struct answer *) pfile->hash_table->alloc_subobject | |
2378 (answer_size); | |
2379 memcpy (new_answer, temp_answer, answer_size); | |
2380 } | |
2381 else | |
2382 BUFF_FRONT (pfile->a_buff) += answer_size; | |
2383 | |
2384 node->type = NT_ASSERTION; | |
2385 node->value.answers = new_answer; | |
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2386 check_eol (pfile, false); |
0 | 2387 } |
2388 } | |
2389 | |
2390 /* Handle #unassert. */ | |
2391 static void | |
2392 do_unassert (cpp_reader *pfile) | |
2393 { | |
2394 cpp_hashnode *node; | |
2395 struct answer *answer; | |
2396 | |
2397 node = parse_assertion (pfile, &answer, T_UNASSERT); | |
2398 /* It isn't an error to #unassert something that isn't asserted. */ | |
2399 if (node && node->type == NT_ASSERTION) | |
2400 { | |
2401 if (answer) | |
2402 { | |
2403 struct answer **p = find_answer (node, answer), *temp; | |
2404 | |
2405 /* Remove the answer from the list. */ | |
2406 temp = *p; | |
2407 if (temp) | |
2408 *p = temp->next; | |
2409 | |
2410 /* Did we free the last answer? */ | |
2411 if (node->value.answers == 0) | |
2412 node->type = NT_VOID; | |
2413 | |
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2414 check_eol (pfile, false); |
0 | 2415 } |
2416 else | |
2417 _cpp_free_definition (node); | |
2418 } | |
2419 | |
2420 /* We don't commit the memory for the answer - it's temporary only. */ | |
2421 } | |
2422 | |
2423 /* These are for -D, -U, -A. */ | |
2424 | |
2425 /* Process the string STR as if it appeared as the body of a #define. | |
2426 If STR is just an identifier, define it with value 1. | |
2427 If STR has anything after the identifier, then it should | |
2428 be identifier=definition. */ | |
2429 void | |
2430 cpp_define (cpp_reader *pfile, const char *str) | |
2431 { | |
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2432 char *buf; |
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2433 const char *p; |
0 | 2434 size_t count; |
2435 | |
2436 /* Copy the entire option so we can modify it. | |
2437 Change the first "=" in the string to a space. If there is none, | |
2438 tack " 1" on the end. */ | |
2439 | |
2440 count = strlen (str); | |
2441 buf = (char *) alloca (count + 3); | |
2442 memcpy (buf, str, count); | |
2443 | |
2444 p = strchr (str, '='); | |
2445 if (p) | |
2446 buf[p - str] = ' '; | |
2447 else | |
2448 { | |
2449 buf[count++] = ' '; | |
2450 buf[count++] = '1'; | |
2451 } | |
2452 buf[count] = '\n'; | |
2453 | |
2454 run_directive (pfile, T_DEFINE, buf, count); | |
2455 } | |
2456 | |
2457 | |
2458 /* Use to build macros to be run through cpp_define() as | |
2459 described above. | |
2460 Example: cpp_define_formatted (pfile, "MACRO=%d", value); */ | |
2461 | |
2462 void | |
2463 cpp_define_formatted (cpp_reader *pfile, const char *fmt, ...) | |
2464 { | |
111 | 2465 char *ptr; |
0 | 2466 |
2467 va_list ap; | |
2468 va_start (ap, fmt); | |
111 | 2469 ptr = xvasprintf (fmt, ap); |
0 | 2470 va_end (ap); |
2471 | |
2472 cpp_define (pfile, ptr); | |
2473 free (ptr); | |
2474 } | |
2475 | |
2476 | |
2477 /* Slight variant of the above for use by initialize_builtins. */ | |
2478 void | |
2479 _cpp_define_builtin (cpp_reader *pfile, const char *str) | |
2480 { | |
2481 size_t len = strlen (str); | |
2482 char *buf = (char *) alloca (len + 1); | |
2483 memcpy (buf, str, len); | |
2484 buf[len] = '\n'; | |
2485 run_directive (pfile, T_DEFINE, buf, len); | |
2486 } | |
2487 | |
2488 /* Process MACRO as if it appeared as the body of an #undef. */ | |
2489 void | |
2490 cpp_undef (cpp_reader *pfile, const char *macro) | |
2491 { | |
2492 size_t len = strlen (macro); | |
2493 char *buf = (char *) alloca (len + 1); | |
2494 memcpy (buf, macro, len); | |
2495 buf[len] = '\n'; | |
2496 run_directive (pfile, T_UNDEF, buf, len); | |
2497 } | |
2498 | |
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2499 /* Replace a previous definition DEF of the macro STR. If DEF is NULL, |
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2500 or first element is zero, then the macro should be undefined. */ |
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2501 static void |
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2502 cpp_pop_definition (cpp_reader *pfile, struct def_pragma_macro *c) |
0 | 2503 { |
67
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2504 cpp_hashnode *node = _cpp_lex_identifier (pfile, c->name); |
0 | 2505 if (node == NULL) |
2506 return; | |
2507 | |
2508 if (pfile->cb.before_define) | |
2509 pfile->cb.before_define (pfile); | |
2510 | |
2511 if (node->type == NT_MACRO) | |
2512 { | |
2513 if (pfile->cb.undef) | |
2514 pfile->cb.undef (pfile, pfile->directive_line, node); | |
2515 if (CPP_OPTION (pfile, warn_unused_macros)) | |
2516 _cpp_warn_if_unused_macro (pfile, node, NULL); | |
2517 } | |
2518 if (node->type != NT_VOID) | |
2519 _cpp_free_definition (node); | |
2520 | |
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2521 if (c->is_undef) |
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2522 return; |
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2523 { |
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2524 size_t namelen; |
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2525 const uchar *dn; |
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2526 cpp_hashnode *h = NULL; |
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2527 cpp_buffer *nbuf; |
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2528 |
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2529 namelen = ustrcspn (c->definition, "( \n"); |
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2530 h = cpp_lookup (pfile, c->definition, namelen); |
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2531 dn = c->definition + namelen; |
0 | 2532 |
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2533 h->type = NT_VOID; |
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2534 h->flags &= ~(NODE_POISONED|NODE_BUILTIN|NODE_DISABLED|NODE_USED); |
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2535 nbuf = cpp_push_buffer (pfile, dn, ustrchr (dn, '\n') - dn, true); |
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2536 if (nbuf != NULL) |
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2537 { |
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2538 _cpp_clean_line (pfile); |
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2539 nbuf->sysp = 1; |
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2540 if (!_cpp_create_definition (pfile, h)) |
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2541 abort (); |
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2542 _cpp_pop_buffer (pfile); |
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2543 } |
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2544 else |
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2545 abort (); |
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2546 h->value.macro->line = c->line; |
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2547 h->value.macro->syshdr = c->syshdr; |
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2548 h->value.macro->used = c->used; |
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2549 } |
0 | 2550 } |
2551 | |
2552 /* Process the string STR as if it appeared as the body of a #assert. */ | |
2553 void | |
2554 cpp_assert (cpp_reader *pfile, const char *str) | |
2555 { | |
2556 handle_assertion (pfile, str, T_ASSERT); | |
2557 } | |
2558 | |
2559 /* Process STR as if it appeared as the body of an #unassert. */ | |
2560 void | |
2561 cpp_unassert (cpp_reader *pfile, const char *str) | |
2562 { | |
2563 handle_assertion (pfile, str, T_UNASSERT); | |
2564 } | |
2565 | |
2566 /* Common code for cpp_assert (-A) and cpp_unassert (-A-). */ | |
2567 static void | |
2568 handle_assertion (cpp_reader *pfile, const char *str, int type) | |
2569 { | |
2570 size_t count = strlen (str); | |
2571 const char *p = strchr (str, '='); | |
2572 | |
2573 /* Copy the entire option so we can modify it. Change the first | |
2574 "=" in the string to a '(', and tack a ')' on the end. */ | |
2575 char *buf = (char *) alloca (count + 2); | |
2576 | |
2577 memcpy (buf, str, count); | |
2578 if (p) | |
2579 { | |
2580 buf[p - str] = '('; | |
2581 buf[count++] = ')'; | |
2582 } | |
2583 buf[count] = '\n'; | |
2584 str = buf; | |
2585 | |
2586 run_directive (pfile, type, str, count); | |
2587 } | |
2588 | |
2589 /* The options structure. */ | |
2590 cpp_options * | |
2591 cpp_get_options (cpp_reader *pfile) | |
2592 { | |
2593 return &pfile->opts; | |
2594 } | |
2595 | |
2596 /* The callbacks structure. */ | |
2597 cpp_callbacks * | |
2598 cpp_get_callbacks (cpp_reader *pfile) | |
2599 { | |
2600 return &pfile->cb; | |
2601 } | |
2602 | |
2603 /* Copy the given callbacks structure to our own. */ | |
2604 void | |
2605 cpp_set_callbacks (cpp_reader *pfile, cpp_callbacks *cb) | |
2606 { | |
2607 pfile->cb = *cb; | |
2608 } | |
2609 | |
2610 /* The dependencies structure. (Creates one if it hasn't already been.) */ | |
2611 struct deps * | |
2612 cpp_get_deps (cpp_reader *pfile) | |
2613 { | |
2614 if (!pfile->deps) | |
2615 pfile->deps = deps_init (); | |
2616 return pfile->deps; | |
2617 } | |
2618 | |
2619 /* Push a new buffer on the buffer stack. Returns the new buffer; it | |
2620 doesn't fail. It does not generate a file change call back; that | |
2621 is the responsibility of the caller. */ | |
2622 cpp_buffer * | |
2623 cpp_push_buffer (cpp_reader *pfile, const uchar *buffer, size_t len, | |
2624 int from_stage3) | |
2625 { | |
2626 cpp_buffer *new_buffer = XOBNEW (&pfile->buffer_ob, cpp_buffer); | |
2627 | |
2628 /* Clears, amongst other things, if_stack and mi_cmacro. */ | |
2629 memset (new_buffer, 0, sizeof (cpp_buffer)); | |
2630 | |
2631 new_buffer->next_line = new_buffer->buf = buffer; | |
2632 new_buffer->rlimit = buffer + len; | |
2633 new_buffer->from_stage3 = from_stage3; | |
2634 new_buffer->prev = pfile->buffer; | |
2635 new_buffer->need_line = true; | |
2636 | |
2637 pfile->buffer = new_buffer; | |
2638 | |
2639 return new_buffer; | |
2640 } | |
2641 | |
2642 /* Pops a single buffer, with a file change call-back if appropriate. | |
2643 Then pushes the next -include file, if any remain. */ | |
2644 void | |
2645 _cpp_pop_buffer (cpp_reader *pfile) | |
2646 { | |
2647 cpp_buffer *buffer = pfile->buffer; | |
2648 struct _cpp_file *inc = buffer->file; | |
2649 struct if_stack *ifs; | |
111 | 2650 const unsigned char *to_free; |
0 | 2651 |
2652 /* Walk back up the conditional stack till we reach its level at | |
2653 entry to this file, issuing error messages. */ | |
2654 for (ifs = buffer->if_stack; ifs; ifs = ifs->next) | |
2655 cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
2656 "unterminated #%s", dtable[ifs->type].name); | |
2657 | |
2658 /* In case of a missing #endif. */ | |
2659 pfile->state.skipping = 0; | |
2660 | |
2661 /* _cpp_do_file_change expects pfile->buffer to be the new one. */ | |
2662 pfile->buffer = buffer->prev; | |
2663 | |
111 | 2664 to_free = buffer->to_free; |
0 | 2665 free (buffer->notes); |
2666 | |
2667 /* Free the buffer object now; we may want to push a new buffer | |
2668 in _cpp_push_next_include_file. */ | |
2669 obstack_free (&pfile->buffer_ob, buffer); | |
2670 | |
2671 if (inc) | |
2672 { | |
111 | 2673 _cpp_pop_file_buffer (pfile, inc, to_free); |
0 | 2674 |
2675 _cpp_do_file_change (pfile, LC_LEAVE, 0, 0, 0); | |
2676 } | |
2677 } | |
2678 | |
2679 /* Enter all recognized directives in the hash table. */ | |
2680 void | |
2681 _cpp_init_directives (cpp_reader *pfile) | |
2682 { | |
2683 unsigned int i; | |
2684 cpp_hashnode *node; | |
2685 | |
2686 for (i = 0; i < (unsigned int) N_DIRECTIVES; i++) | |
2687 { | |
2688 node = cpp_lookup (pfile, dtable[i].name, dtable[i].length); | |
2689 node->is_directive = 1; | |
2690 node->directive_index = i; | |
2691 } | |
2692 } | |
111 | 2693 |
2694 /* Extract header file from a bracket include. Parsing starts after '<'. | |
2695 The string is malloced and must be freed by the caller. */ | |
2696 char * | |
2697 _cpp_bracket_include(cpp_reader *pfile) | |
2698 { | |
2699 return glue_header_name (pfile); | |
2700 } | |
2701 |