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a949941c | 1 | /* CPP Library. (Directive handling.) |
a5544970 | 2 | Copyright (C) 1986-2019 Free Software Foundation, Inc. |
4c8cc616 | 3 | Contributed by Per Bothner, 1994-95. |
d8bfa78c | 4 | Based on CCCP program by Paul Rubin, June 1986 |
7f2935c7 PB |
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 | |
748086b7 | 9 | Free Software Foundation; either version 3, or (at your option) any |
7f2935c7 PB |
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 | |
748086b7 JJ |
18 | along with this program; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
7f2935c7 | 20 | |
956d6950 | 21 | #include "config.h" |
b04cd507 | 22 | #include "system.h" |
956d6950 | 23 | #include "cpplib.h" |
4f4e53dd | 24 | #include "internal.h" |
c6e83800 | 25 | #include "mkdeps.h" |
c71f835b | 26 | #include "obstack.h" |
7f2935c7 | 27 | |
88ae23e7 ZW |
28 | /* Stack of conditionals currently in progress |
29 | (including both successful and failing conditionals). */ | |
88ae23e7 ZW |
30 | struct if_stack |
31 | { | |
32 | struct if_stack *next; | |
620e594b | 33 | location_t line; /* Line where condition started. */ |
93c80368 | 34 | const cpp_hashnode *mi_cmacro;/* macro name for #ifndef around entire file */ |
cef0d199 NB |
35 | bool skip_elses; /* Can future #else / #elif be skipped? */ |
36 | bool was_skipping; /* If were skipping on entry. */ | |
6cf87ca4 | 37 | int type; /* Most recent conditional for diagnostics. */ |
88ae23e7 | 38 | }; |
88ae23e7 | 39 | |
a5da89c6 | 40 | /* Contains a registered pragma or pragma namespace. */ |
6cf87ca4 | 41 | typedef void (*pragma_cb) (cpp_reader *); |
a5da89c6 NB |
42 | struct pragma_entry |
43 | { | |
44 | struct pragma_entry *next; | |
4b115ff0 | 45 | const cpp_hashnode *pragma; /* Name and length. */ |
21b11495 ZW |
46 | bool is_nspace; |
47 | bool is_internal; | |
bc4071dd RH |
48 | bool is_deferred; |
49 | bool allow_expansion; | |
a5da89c6 NB |
50 | union { |
51 | pragma_cb handler; | |
52 | struct pragma_entry *space; | |
bc4071dd | 53 | unsigned int ident; |
a5da89c6 NB |
54 | } u; |
55 | }; | |
56 | ||
93c80368 NB |
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 | |
1a76916c NB |
68 | effect (these are the directives with callback hooks). |
69 | ||
d97371e0 | 70 | EXPAND is set on directives that are always macro-expanded. */ |
93c80368 NB |
71 | #define COND (1 << 0) |
72 | #define IF_COND (1 << 1) | |
73 | #define INCL (1 << 2) | |
74 | #define IN_I (1 << 3) | |
1a76916c | 75 | #define EXPAND (1 << 4) |
899015a0 | 76 | #define DEPRECATED (1 << 5) |
93c80368 NB |
77 | |
78 | /* Defines one #-directive, including how to handle it. */ | |
6cf87ca4 | 79 | typedef void (*directive_handler) (cpp_reader *); |
93c80368 NB |
80 | typedef struct directive directive; |
81 | struct directive | |
82 | { | |
83 | directive_handler handler; /* Function to handle directive. */ | |
562a5c27 | 84 | const uchar *name; /* Name of directive. */ |
93c80368 NB |
85 | unsigned short length; /* Length of name. */ |
86 | unsigned char origin; /* Origin of directive. */ | |
87 | unsigned char flags; /* Flags describing this directive. */ | |
88 | }; | |
89 | ||
1316f1f7 ZW |
90 | /* Forward declarations. */ |
91 | ||
6cf87ca4 | 92 | static void skip_rest_of_line (cpp_reader *); |
a5cb563b | 93 | static void check_eol (cpp_reader *, bool); |
6cf87ca4 ZW |
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 *); | |
a28fbdba | 100 | static const char *parse_include (cpp_reader *, int *, const cpp_token ***, |
620e594b | 101 | location_t *); |
6cf87ca4 ZW |
102 | static void push_conditional (cpp_reader *, int, int, const cpp_hashnode *); |
103 | static unsigned int read_flag (cpp_reader *, unsigned int); | |
3b8f20a1 | 104 | static bool strtolinenum (const uchar *, size_t, linenum_type *, bool *); |
c24300ba DM |
105 | static void do_diagnostic (cpp_reader *, enum cpp_diagnostic_level code, |
106 | enum cpp_warning_reason reason, int); | |
ee1c2a10 | 107 | static cpp_hashnode *lex_macro_node (cpp_reader *, bool); |
d1bd0ded | 108 | static int undefine_macros (cpp_reader *, cpp_hashnode *, void *); |
6cf87ca4 ZW |
109 | static void do_include_common (cpp_reader *, enum include_type); |
110 | static struct pragma_entry *lookup_pragma_entry (struct pragma_entry *, | |
111 | const cpp_hashnode *); | |
6cf87ca4 ZW |
112 | static int count_registered_pragmas (struct pragma_entry *); |
113 | static char ** save_registered_pragmas (struct pragma_entry *, char **); | |
114 | static char ** restore_registered_pragmas (cpp_reader *, struct pragma_entry *, | |
115 | char **); | |
116 | static void do_pragma_once (cpp_reader *); | |
117 | static void do_pragma_poison (cpp_reader *); | |
118 | static void do_pragma_system_header (cpp_reader *); | |
119 | static void do_pragma_dependency (cpp_reader *); | |
f591bd8f FW |
120 | static void do_pragma_warning_or_error (cpp_reader *, bool error); |
121 | static void do_pragma_warning (cpp_reader *); | |
122 | static void do_pragma_error (cpp_reader *); | |
6cf87ca4 ZW |
123 | static void do_linemarker (cpp_reader *); |
124 | static const cpp_token *get_token_no_padding (cpp_reader *); | |
125 | static const cpp_token *get__Pragma_string (cpp_reader *); | |
e2eb5056 | 126 | static void destringize_and_run (cpp_reader *, const cpp_string *, |
620e594b DM |
127 | location_t); |
128 | static bool parse_answer (cpp_reader *, int, location_t, cpp_macro **); | |
3fb558b1 NS |
129 | static cpp_hashnode *parse_assertion (cpp_reader *, int, cpp_macro **); |
130 | static cpp_macro **find_answer (cpp_hashnode *, const cpp_macro *); | |
6cf87ca4 | 131 | static void handle_assertion (cpp_reader *, const char *, int); |
17e7cb85 KT |
132 | static void do_pragma_push_macro (cpp_reader *); |
133 | static void do_pragma_pop_macro (cpp_reader *); | |
d6874138 | 134 | static void cpp_pop_definition (cpp_reader *, struct def_pragma_macro *); |
d481b69b | 135 | |
ff65e980 NS |
136 | /* This is the table of directive handlers. All extensions other than |
137 | #warning, #include_next, and #import are deprecated. The name is | |
138 | where the extension appears to have come from. */ | |
168d3732 | 139 | |
93c80368 | 140 | #define DIRECTIVE_TABLE \ |
ff65e980 NS |
141 | D(define, T_DEFINE = 0, KANDR, IN_I) \ |
142 | D(include, T_INCLUDE, KANDR, INCL | EXPAND) \ | |
143 | D(endif, T_ENDIF, KANDR, COND) \ | |
144 | D(ifdef, T_IFDEF, KANDR, COND | IF_COND) \ | |
145 | D(if, T_IF, KANDR, COND | IF_COND | EXPAND) \ | |
146 | D(else, T_ELSE, KANDR, COND) \ | |
147 | D(ifndef, T_IFNDEF, KANDR, COND | IF_COND) \ | |
148 | D(undef, T_UNDEF, KANDR, IN_I) \ | |
149 | D(line, T_LINE, KANDR, EXPAND) \ | |
150 | D(elif, T_ELIF, STDC89, COND | EXPAND) \ | |
151 | D(error, T_ERROR, STDC89, 0) \ | |
152 | D(pragma, T_PRAGMA, STDC89, IN_I) \ | |
153 | D(warning, T_WARNING, EXTENSION, 0) \ | |
154 | D(include_next, T_INCLUDE_NEXT, EXTENSION, INCL | EXPAND) \ | |
155 | D(ident, T_IDENT, EXTENSION, IN_I) \ | |
156 | D(import, T_IMPORT, EXTENSION, INCL | EXPAND) /* ObjC */ \ | |
157 | D(assert, T_ASSERT, EXTENSION, DEPRECATED) /* SVR4 */ \ | |
158 | D(unassert, T_UNASSERT, EXTENSION, DEPRECATED) /* SVR4 */ \ | |
159 | D(sccs, T_SCCS, EXTENSION, IN_I) /* SVR4? */ | |
1ed17cd5 ZW |
160 | |
161 | /* #sccs is synonymous with #ident. */ | |
162 | #define do_sccs do_ident | |
07aa0b04 | 163 | |
168d3732 ZW |
164 | /* Use the table to generate a series of prototypes, an enum for the |
165 | directive names, and an array of directive handlers. */ | |
166 | ||
6cf87ca4 | 167 | #define D(name, t, o, f) static void do_##name (cpp_reader *); |
168d3732 ZW |
168 | DIRECTIVE_TABLE |
169 | #undef D | |
170 | ||
041c3194 | 171 | #define D(n, tag, o, f) tag, |
168d3732 ZW |
172 | enum |
173 | { | |
174 | DIRECTIVE_TABLE | |
175 | N_DIRECTIVES | |
7f2935c7 | 176 | }; |
168d3732 ZW |
177 | #undef D |
178 | ||
041c3194 | 179 | #define D(name, t, origin, flags) \ |
9a238586 KG |
180 | { do_##name, (const uchar *) #name, \ |
181 | sizeof #name - 1, origin, flags }, | |
93c80368 | 182 | static const directive dtable[] = |
168d3732 ZW |
183 | { |
184 | DIRECTIVE_TABLE | |
185 | }; | |
186 | #undef D | |
cb18fd07 DM |
187 | |
188 | /* A NULL-terminated array of directive names for use | |
189 | when suggesting corrections for misspelled directives. */ | |
190 | #define D(name, t, origin, flags) #name, | |
191 | static const char * const directive_names[] = { | |
192 | DIRECTIVE_TABLE | |
193 | NULL | |
194 | }; | |
195 | #undef D | |
196 | ||
168d3732 | 197 | #undef DIRECTIVE_TABLE |
7f2935c7 | 198 | |
dcc229e5 ZW |
199 | /* Wrapper struct directive for linemarkers. |
200 | The origin is more or less true - the original K+R cpp | |
201 | did use this notation in its preprocessed output. */ | |
202 | static const directive linemarker_dir = | |
203 | { | |
b6baa67d | 204 | do_linemarker, UC"#", 1, KANDR, IN_I |
dcc229e5 ZW |
205 | }; |
206 | ||
93c80368 NB |
207 | /* Skip any remaining tokens in a directive. */ |
208 | static void | |
6cf87ca4 | 209 | skip_rest_of_line (cpp_reader *pfile) |
c5a04734 | 210 | { |
93c80368 | 211 | /* Discard all stacked contexts. */ |
8128cccf | 212 | while (pfile->context->prev) |
93c80368 NB |
213 | _cpp_pop_context (pfile); |
214 | ||
b528a07e | 215 | /* Sweep up all tokens remaining on the line. */ |
345894b4 NB |
216 | if (! SEEN_EOL ()) |
217 | while (_cpp_lex_token (pfile)->type != CPP_EOF) | |
218 | ; | |
93c80368 | 219 | } |
c5a04734 | 220 | |
81b5d104 MLI |
221 | /* Helper function for check_oel. */ |
222 | ||
93c80368 | 223 | static void |
c24300ba | 224 | check_eol_1 (cpp_reader *pfile, bool expand, enum cpp_warning_reason reason) |
93c80368 | 225 | { |
a5cb563b JM |
226 | if (! SEEN_EOL () && (expand |
227 | ? cpp_get_token (pfile) | |
228 | : _cpp_lex_token (pfile))->type != CPP_EOF) | |
81b5d104 MLI |
229 | cpp_pedwarning (pfile, reason, "extra tokens at end of #%s directive", |
230 | pfile->directive->name); | |
231 | } | |
232 | ||
233 | /* Variant of check_eol used for Wendif-labels warnings. */ | |
234 | ||
235 | static void | |
236 | check_eol_endif_labels (cpp_reader *pfile) | |
237 | { | |
238 | check_eol_1 (pfile, false, CPP_W_ENDIF_LABELS); | |
239 | } | |
240 | ||
241 | /* Ensure there are no stray tokens at the end of a directive. If | |
242 | EXPAND is true, tokens macro-expanding to nothing are allowed. */ | |
243 | ||
244 | static void | |
245 | check_eol (cpp_reader *pfile, bool expand) | |
246 | { | |
247 | check_eol_1 (pfile, expand, CPP_W_NONE); | |
93c80368 NB |
248 | } |
249 | ||
cbc43ae0 ILT |
250 | /* Ensure there are no stray tokens other than comments at the end of |
251 | a directive, and gather the comments. */ | |
252 | static const cpp_token ** | |
253 | check_eol_return_comments (cpp_reader *pfile) | |
254 | { | |
255 | size_t c; | |
256 | size_t capacity = 8; | |
257 | const cpp_token **buf; | |
258 | ||
259 | buf = XNEWVEC (const cpp_token *, capacity); | |
260 | c = 0; | |
261 | if (! SEEN_EOL ()) | |
262 | { | |
263 | while (1) | |
264 | { | |
265 | const cpp_token *tok; | |
266 | ||
267 | tok = _cpp_lex_token (pfile); | |
268 | if (tok->type == CPP_EOF) | |
269 | break; | |
270 | if (tok->type != CPP_COMMENT) | |
271 | cpp_error (pfile, CPP_DL_PEDWARN, | |
272 | "extra tokens at end of #%s directive", | |
273 | pfile->directive->name); | |
274 | else | |
275 | { | |
276 | if (c + 1 >= capacity) | |
277 | { | |
278 | capacity *= 2; | |
279 | buf = XRESIZEVEC (const cpp_token *, buf, capacity); | |
280 | } | |
281 | buf[c] = tok; | |
282 | ++c; | |
283 | } | |
284 | } | |
285 | } | |
286 | buf[c] = NULL; | |
287 | return buf; | |
288 | } | |
289 | ||
fe6c2db9 NB |
290 | /* Called when entering a directive, _Pragma or command-line directive. */ |
291 | static void | |
6cf87ca4 | 292 | start_directive (cpp_reader *pfile) |
93c80368 | 293 | { |
7f2f1a66 NB |
294 | /* Setup in-directive state. */ |
295 | pfile->state.in_directive = 1; | |
296 | pfile->state.save_comments = 0; | |
21b11495 | 297 | pfile->directive_result.type = CPP_PADDING; |
7f2f1a66 | 298 | |
93c80368 | 299 | /* Some handlers need the position of the # for diagnostics. */ |
500bee0a | 300 | pfile->directive_line = pfile->line_table->highest_line; |
fe6c2db9 NB |
301 | } |
302 | ||
303 | /* Called when leaving a directive, _Pragma or command-line directive. */ | |
304 | static void | |
6cf87ca4 | 305 | end_directive (cpp_reader *pfile, int skip_line) |
fe6c2db9 | 306 | { |
c5a62c6f | 307 | if (CPP_OPTION (pfile, traditional)) |
1a76916c | 308 | { |
d97371e0 | 309 | /* Revert change of prepare_directive_trad. */ |
c5a62c6f EB |
310 | if (!pfile->state.in_deferred_pragma) |
311 | pfile->state.prevent_expansion--; | |
d97371e0 | 312 | |
b66377c1 | 313 | if (pfile->directive != &dtable[T_DEFINE]) |
1a76916c NB |
314 | _cpp_remove_overlay (pfile); |
315 | } | |
c5a62c6f EB |
316 | else if (pfile->state.in_deferred_pragma) |
317 | ; | |
fe6c2db9 | 318 | /* We don't skip for an assembler #. */ |
b66377c1 | 319 | else if (skip_line) |
67821e3a NB |
320 | { |
321 | skip_rest_of_line (pfile); | |
bdcbe496 NB |
322 | if (!pfile->keep_tokens) |
323 | { | |
324 | pfile->cur_run = &pfile->base_run; | |
325 | pfile->cur_token = pfile->base_run.base; | |
326 | } | |
67821e3a | 327 | } |
fe6c2db9 NB |
328 | |
329 | /* Restore state. */ | |
fe6c2db9 NB |
330 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
331 | pfile->state.in_directive = 0; | |
d97371e0 | 332 | pfile->state.in_expression = 0; |
fe6c2db9 NB |
333 | pfile->state.angled_headers = 0; |
334 | pfile->directive = 0; | |
335 | } | |
336 | ||
1a76916c NB |
337 | /* Prepare to handle the directive in pfile->directive. */ |
338 | static void | |
6cf87ca4 | 339 | prepare_directive_trad (cpp_reader *pfile) |
1a76916c | 340 | { |
951a0766 | 341 | if (pfile->directive != &dtable[T_DEFINE]) |
1a76916c | 342 | { |
b66377c1 NB |
343 | bool no_expand = (pfile->directive |
344 | && ! (pfile->directive->flags & EXPAND)); | |
974c43f1 | 345 | bool was_skipping = pfile->state.skipping; |
1a76916c | 346 | |
d97371e0 NB |
347 | pfile->state.in_expression = (pfile->directive == &dtable[T_IF] |
348 | || pfile->directive == &dtable[T_ELIF]); | |
45f2492c NB |
349 | if (pfile->state.in_expression) |
350 | pfile->state.skipping = false; | |
351 | ||
1a76916c NB |
352 | if (no_expand) |
353 | pfile->state.prevent_expansion++; | |
fb136e35 | 354 | _cpp_scan_out_logical_line (pfile, NULL, false); |
1a76916c NB |
355 | if (no_expand) |
356 | pfile->state.prevent_expansion--; | |
45f2492c | 357 | |
974c43f1 | 358 | pfile->state.skipping = was_skipping; |
1a76916c NB |
359 | _cpp_overlay_buffer (pfile, pfile->out.base, |
360 | pfile->out.cur - pfile->out.base); | |
361 | } | |
d97371e0 NB |
362 | |
363 | /* Stop ISO C from expanding anything. */ | |
364 | pfile->state.prevent_expansion++; | |
1a76916c NB |
365 | } |
366 | ||
da7d8304 | 367 | /* Output diagnostics for a directive DIR. INDENTED is nonzero if |
18a9d8ff | 368 | the '#' was indented. */ |
18a9d8ff | 369 | static void |
6cf87ca4 | 370 | directive_diagnostics (cpp_reader *pfile, const directive *dir, int indented) |
18a9d8ff | 371 | { |
899015a0 TT |
372 | /* Issue -pedantic or deprecated warnings for extensions. We let |
373 | -pedantic take precedence if both are applicable. */ | |
374 | if (! pfile->state.skipping) | |
375 | { | |
376 | if (dir->origin == EXTENSION | |
377 | && !(dir == &dtable[T_IMPORT] && CPP_OPTION (pfile, objc)) | |
378 | && CPP_PEDANTIC (pfile)) | |
379 | cpp_error (pfile, CPP_DL_PEDWARN, "#%s is a GCC extension", dir->name); | |
380 | else if (((dir->flags & DEPRECATED) != 0 | |
381 | || (dir == &dtable[T_IMPORT] && !CPP_OPTION (pfile, objc))) | |
e3339d0f | 382 | && CPP_OPTION (pfile, cpp_warn_deprecated)) |
87cf0651 SB |
383 | cpp_warning (pfile, CPP_W_DEPRECATED, |
384 | "#%s is a deprecated GCC extension", dir->name); | |
899015a0 | 385 | } |
dcc229e5 ZW |
386 | |
387 | /* Traditionally, a directive is ignored unless its # is in | |
388 | column 1. Therefore in code intended to work with K+R | |
389 | compilers, directives added by C89 must have their # | |
390 | indented, and directives present in traditional C must not. | |
391 | This is true even of directives in skipped conditional | |
392 | blocks. #elif cannot be used at all. */ | |
393 | if (CPP_WTRADITIONAL (pfile)) | |
18a9d8ff | 394 | { |
dcc229e5 | 395 | if (dir == &dtable[T_ELIF]) |
87cf0651 SB |
396 | cpp_warning (pfile, CPP_W_TRADITIONAL, |
397 | "suggest not using #elif in traditional C"); | |
dcc229e5 | 398 | else if (indented && dir->origin == KANDR) |
87cf0651 SB |
399 | cpp_warning (pfile, CPP_W_TRADITIONAL, |
400 | "traditional C ignores #%s with the # indented", | |
401 | dir->name); | |
dcc229e5 | 402 | else if (!indented && dir->origin != KANDR) |
87cf0651 SB |
403 | cpp_warning (pfile, CPP_W_TRADITIONAL, |
404 | "suggest hiding #%s from traditional C with an indented #", | |
405 | dir->name); | |
18a9d8ff NB |
406 | } |
407 | } | |
408 | ||
a0be978a | 409 | /* Check if we have a known directive. INDENTED is true if the |
18a9d8ff | 410 | '#' of the directive was indented. This function is in this file |
a2566ae9 | 411 | to save unnecessarily exporting dtable etc. to lex.c. Returns |
da7d8304 | 412 | nonzero if the line of tokens has been handled, zero if we should |
18a9d8ff | 413 | continue processing the line. */ |
fe6c2db9 | 414 | int |
a0be978a | 415 | _cpp_handle_directive (cpp_reader *pfile, bool indented) |
fe6c2db9 | 416 | { |
fe6c2db9 | 417 | const directive *dir = 0; |
345894b4 | 418 | const cpp_token *dname; |
e808ec9c | 419 | bool was_parsing_args = pfile->state.parsing_args; |
c6e83800 | 420 | bool was_discarding_output = pfile->state.discarding_output; |
fe6c2db9 NB |
421 | int skip = 1; |
422 | ||
c6e83800 ZW |
423 | if (was_discarding_output) |
424 | pfile->state.prevent_expansion = 0; | |
425 | ||
e808ec9c NB |
426 | if (was_parsing_args) |
427 | { | |
e3339d0f | 428 | if (CPP_OPTION (pfile, cpp_pedantic)) |
0527bc4e | 429 | cpp_error (pfile, CPP_DL_PEDWARN, |
e808ec9c NB |
430 | "embedding a directive within macro arguments is not portable"); |
431 | pfile->state.parsing_args = 0; | |
432 | pfile->state.prevent_expansion = 0; | |
433 | } | |
fe6c2db9 | 434 | start_directive (pfile); |
345894b4 | 435 | dname = _cpp_lex_token (pfile); |
0d9f234d | 436 | |
345894b4 | 437 | if (dname->type == CPP_NAME) |
0d9f234d | 438 | { |
9a0c6187 JM |
439 | if (dname->val.node.node->is_directive) |
440 | dir = &dtable[dname->val.node.node->directive_index]; | |
0d9f234d | 441 | } |
05713b80 | 442 | /* We do not recognize the # followed by a number extension in |
18a9d8ff | 443 | assembler code. */ |
345894b4 | 444 | else if (dname->type == CPP_NUMBER && CPP_OPTION (pfile, lang) != CLK_ASM) |
0d9f234d | 445 | { |
dcc229e5 ZW |
446 | dir = &linemarker_dir; |
447 | if (CPP_PEDANTIC (pfile) && ! CPP_OPTION (pfile, preprocessed) | |
448 | && ! pfile->state.skipping) | |
0527bc4e | 449 | cpp_error (pfile, CPP_DL_PEDWARN, |
ebef4e8c | 450 | "style of line directive is a GCC extension"); |
93c80368 | 451 | } |
0d9f234d | 452 | |
93c80368 NB |
453 | if (dir) |
454 | { | |
18a9d8ff NB |
455 | /* If we have a directive that is not an opening conditional, |
456 | invalidate any control macro. */ | |
457 | if (! (dir->flags & IF_COND)) | |
458 | pfile->mi_valid = false; | |
459 | ||
460 | /* Kluge alert. In order to be sure that code like this | |
461 | ||
462 | #define HASH # | |
463 | HASH define foo bar | |
464 | ||
465 | does not cause '#define foo bar' to get executed when | |
466 | compiled with -save-temps, we recognize directives in | |
a2566ae9 | 467 | -fpreprocessed mode only if the # is in column 1. macro.c |
ccfc4c91 OW |
468 | puts a space in front of any '#' at the start of a macro. |
469 | ||
470 | We exclude the -fdirectives-only case because macro expansion | |
471 | has not been performed yet, and block comments can cause spaces | |
7d9641cc | 472 | to precede the directive. */ |
18a9d8ff | 473 | if (CPP_OPTION (pfile, preprocessed) |
ccfc4c91 | 474 | && !CPP_OPTION (pfile, directives_only) |
18a9d8ff | 475 | && (indented || !(dir->flags & IN_I))) |
6d4587f7 | 476 | { |
18a9d8ff NB |
477 | skip = 0; |
478 | dir = 0; | |
6d4587f7 ZW |
479 | } |
480 | else | |
93c80368 | 481 | { |
18a9d8ff NB |
482 | /* In failed conditional groups, all non-conditional |
483 | directives are ignored. Before doing that, whether | |
484 | skipping or not, we should lex angle-bracketed headers | |
485 | correctly, and maybe output some diagnostics. */ | |
486 | pfile->state.angled_headers = dir->flags & INCL; | |
a8d0ddaf | 487 | pfile->state.directive_wants_padding = dir->flags & INCL; |
18a9d8ff NB |
488 | if (! CPP_OPTION (pfile, preprocessed)) |
489 | directive_diagnostics (pfile, dir, indented); | |
490 | if (pfile->state.skipping && !(dir->flags & COND)) | |
491 | dir = 0; | |
93c80368 NB |
492 | } |
493 | } | |
345894b4 | 494 | else if (dname->type == CPP_EOF) |
18a9d8ff NB |
495 | ; /* CPP_EOF is the "null directive". */ |
496 | else | |
93c80368 NB |
497 | { |
498 | /* An unknown directive. Don't complain about it in assembly | |
499 | source: we don't know where the comments are, and # may | |
500 | introduce assembler pseudo-ops. Don't complain about invalid | |
501 | directives in skipped conditional groups (6.10 p4). */ | |
bdb05a7b | 502 | if (CPP_OPTION (pfile, lang) == CLK_ASM) |
18a9d8ff NB |
503 | skip = 0; |
504 | else if (!pfile->state.skipping) | |
cb18fd07 DM |
505 | { |
506 | const char *unrecognized | |
507 | = (const char *)cpp_token_as_text (pfile, dname); | |
508 | const char *hint = NULL; | |
509 | ||
510 | /* Call back into gcc to get a spelling suggestion. Ideally | |
511 | we'd just use best_match from gcc/spellcheck.h (and filter | |
512 | out the uncommon directives), but that requires moving it | |
513 | to a support library. */ | |
514 | if (pfile->cb.get_suggestion) | |
515 | hint = pfile->cb.get_suggestion (pfile, unrecognized, | |
516 | directive_names); | |
517 | ||
518 | if (hint) | |
519 | { | |
520 | rich_location richloc (pfile->line_table, dname->src_loc); | |
521 | source_range misspelled_token_range | |
522 | = get_range_from_loc (pfile->line_table, dname->src_loc); | |
523 | richloc.add_fixit_replace (misspelled_token_range, hint); | |
64a5912c DM |
524 | cpp_error_at (pfile, CPP_DL_ERROR, &richloc, |
525 | "invalid preprocessing directive #%s;" | |
526 | " did you mean #%s?", | |
527 | unrecognized, hint); | |
cb18fd07 DM |
528 | } |
529 | else | |
530 | cpp_error (pfile, CPP_DL_ERROR, | |
531 | "invalid preprocessing directive #%s", | |
532 | unrecognized); | |
533 | } | |
0d9f234d NB |
534 | } |
535 | ||
d1a58688 NB |
536 | pfile->directive = dir; |
537 | if (CPP_OPTION (pfile, traditional)) | |
538 | prepare_directive_trad (pfile); | |
539 | ||
18a9d8ff | 540 | if (dir) |
6cf87ca4 | 541 | pfile->directive->handler (pfile); |
18a9d8ff NB |
542 | else if (skip == 0) |
543 | _cpp_backup_tokens (pfile, 1); | |
544 | ||
545 | end_directive (pfile, skip); | |
765d600a | 546 | if (was_parsing_args && !pfile->state.in_deferred_pragma) |
e808ec9c NB |
547 | { |
548 | /* Restore state when within macro args. */ | |
549 | pfile->state.parsing_args = 2; | |
550 | pfile->state.prevent_expansion = 1; | |
e808ec9c | 551 | } |
c6e83800 ZW |
552 | if (was_discarding_output) |
553 | pfile->state.prevent_expansion = 1; | |
fe6c2db9 | 554 | return skip; |
041c3194 | 555 | } |
7f2935c7 | 556 | |
93c80368 | 557 | /* Directive handler wrapper used by the command line option |
26aea073 | 558 | processor. BUF is \n terminated. */ |
93c80368 | 559 | static void |
6cf87ca4 | 560 | run_directive (cpp_reader *pfile, int dir_no, const char *buf, size_t count) |
3fdc651f | 561 | { |
562a5c27 | 562 | cpp_push_buffer (pfile, (const uchar *) buf, count, |
40de9f76 | 563 | /* from_stage3 */ true); |
0bda4760 | 564 | start_directive (pfile); |
26aea073 NB |
565 | |
566 | /* This is a short-term fix to prevent a leading '#' being | |
567 | interpreted as a directive. */ | |
568 | _cpp_clean_line (pfile); | |
569 | ||
f71aebba | 570 | pfile->directive = &dtable[dir_no]; |
1a76916c NB |
571 | if (CPP_OPTION (pfile, traditional)) |
572 | prepare_directive_trad (pfile); | |
6cf87ca4 | 573 | pfile->directive->handler (pfile); |
0bda4760 | 574 | end_directive (pfile, 1); |
ef6e958a | 575 | _cpp_pop_buffer (pfile); |
93c80368 NB |
576 | } |
577 | ||
578 | /* Checks for validity the macro name in #define, #undef, #ifdef and | |
ee1c2a10 TT |
579 | #ifndef directives. IS_DEF_OR_UNDEF is true if this call is |
580 | processing a #define or #undefine directive, and false | |
581 | otherwise. */ | |
041c3194 | 582 | static cpp_hashnode * |
ee1c2a10 | 583 | lex_macro_node (cpp_reader *pfile, bool is_def_or_undef) |
041c3194 | 584 | { |
1a76916c | 585 | const cpp_token *token = _cpp_lex_token (pfile); |
ea4a453b | 586 | |
92936ecf | 587 | /* The token immediately after #define must be an identifier. That |
b8363a24 ZW |
588 | identifier may not be "defined", per C99 6.10.8p4. |
589 | In C++, it may not be any of the "named operators" either, | |
590 | per C++98 [lex.digraph], [lex.key]. | |
591 | Finally, the identifier may not have been poisoned. (In that case | |
1d63a28a | 592 | the lexer has issued the error message for us.) */ |
cbc69f84 | 593 | |
1a76916c NB |
594 | if (token->type == CPP_NAME) |
595 | { | |
9a0c6187 | 596 | cpp_hashnode *node = token->val.node.node; |
92936ecf | 597 | |
ee1c2a10 | 598 | if (is_def_or_undef && node == pfile->spec_nodes.n_defined) |
0527bc4e | 599 | cpp_error (pfile, CPP_DL_ERROR, |
1a76916c | 600 | "\"defined\" cannot be used as a macro name"); |
a15f7cb8 ESR |
601 | else if (is_def_or_undef |
602 | && (node == pfile->spec_nodes.n__has_include__ | |
603 | || node == pfile->spec_nodes.n__has_include_next__)) | |
604 | cpp_error (pfile, CPP_DL_ERROR, | |
605 | "\"__has_include__\" cannot be used as a macro name"); | |
1a76916c NB |
606 | else if (! (node->flags & NODE_POISONED)) |
607 | return node; | |
ba89d661 | 608 | } |
1a76916c | 609 | else if (token->flags & NAMED_OP) |
0527bc4e | 610 | cpp_error (pfile, CPP_DL_ERROR, |
cbc69f84 | 611 | "\"%s\" cannot be used as a macro name as it is an operator in C++", |
9a0c6187 | 612 | NODE_NAME (token->val.node.node)); |
1a76916c | 613 | else if (token->type == CPP_EOF) |
0527bc4e | 614 | cpp_error (pfile, CPP_DL_ERROR, "no macro name given in #%s directive", |
1a76916c NB |
615 | pfile->directive->name); |
616 | else | |
0527bc4e | 617 | cpp_error (pfile, CPP_DL_ERROR, "macro names must be identifiers"); |
07aa0b04 | 618 | |
cbc69f84 | 619 | return NULL; |
7f2935c7 | 620 | } |
7f2935c7 | 621 | |
a2566ae9 | 622 | /* Process a #define directive. Most work is done in macro.c. */ |
711b8824 | 623 | static void |
6cf87ca4 | 624 | do_define (cpp_reader *pfile) |
7f2935c7 | 625 | { |
ee1c2a10 | 626 | cpp_hashnode *node = lex_macro_node (pfile, true); |
ff2b53ef | 627 | |
93c80368 NB |
628 | if (node) |
629 | { | |
1d63a28a NB |
630 | /* If we have been requested to expand comments into macros, |
631 | then re-enable saving of comments. */ | |
632 | pfile->state.save_comments = | |
633 | ! CPP_OPTION (pfile, discard_comments_in_macro_exp); | |
634 | ||
93d45d9e JM |
635 | if (pfile->cb.before_define) |
636 | pfile->cb.before_define (pfile); | |
637 | ||
93c80368 NB |
638 | if (_cpp_create_definition (pfile, node)) |
639 | if (pfile->cb.define) | |
6cf87ca4 | 640 | pfile->cb.define (pfile, pfile->directive_line, node); |
93d45d9e JM |
641 | |
642 | node->flags &= ~NODE_USED; | |
93c80368 | 643 | } |
041c3194 ZW |
644 | } |
645 | ||
5d8ebbd8 | 646 | /* Handle #undef. Mark the identifier NT_VOID in the hash table. */ |
711b8824 | 647 | static void |
6cf87ca4 | 648 | do_undef (cpp_reader *pfile) |
041c3194 | 649 | { |
ee1c2a10 | 650 | cpp_hashnode *node = lex_macro_node (pfile, true); |
9e62c811 | 651 | |
45f2492c | 652 | if (node) |
9e62c811 | 653 | { |
93d45d9e JM |
654 | if (pfile->cb.before_define) |
655 | pfile->cb.before_define (pfile); | |
656 | ||
58fea6af | 657 | if (pfile->cb.undef) |
6cf87ca4 | 658 | pfile->cb.undef (pfile, pfile->directive_line, node); |
9e62c811 | 659 | |
45f2492c NB |
660 | /* 6.10.3.5 paragraph 2: [#undef] is ignored if the specified |
661 | identifier is not currently defined as a macro name. */ | |
7692e253 | 662 | if (cpp_macro_p (node)) |
45f2492c NB |
663 | { |
664 | if (node->flags & NODE_WARN) | |
665 | cpp_error (pfile, CPP_DL_WARNING, | |
666 | "undefining \"%s\"", NODE_NAME (node)); | |
7692e253 | 667 | else if (cpp_builtin_macro_p (node) |
b753b37b MLI |
668 | && CPP_OPTION (pfile, warn_builtin_macro_redefined)) |
669 | cpp_warning_with_line (pfile, CPP_W_BUILTIN_MACRO_REDEFINED, | |
670 | pfile->directive_line, 0, | |
671 | "undefining \"%s\"", NODE_NAME (node)); | |
9e62c811 | 672 | |
45f2492c NB |
673 | if (CPP_OPTION (pfile, warn_unused_macros)) |
674 | _cpp_warn_if_unused_macro (pfile, node, NULL); | |
a69cbaac | 675 | |
45f2492c NB |
676 | _cpp_free_definition (node); |
677 | } | |
9e62c811 | 678 | } |
45f2492c | 679 | |
a5cb563b | 680 | check_eol (pfile, false); |
7f2935c7 PB |
681 | } |
682 | ||
d1bd0ded GK |
683 | /* Undefine a single macro/assertion/whatever. */ |
684 | ||
685 | static int | |
c6e83800 | 686 | undefine_macros (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *h, |
d1bd0ded GK |
687 | void *data_p ATTRIBUTE_UNUSED) |
688 | { | |
c6e83800 ZW |
689 | /* Body of _cpp_free_definition inlined here for speed. |
690 | Macros and assertions no longer have anything to free. */ | |
691 | h->type = NT_VOID; | |
a570d97f NS |
692 | h->value.answers = NULL; |
693 | h->flags &= ~(NODE_POISONED|NODE_DISABLED|NODE_USED); | |
d1bd0ded GK |
694 | return 1; |
695 | } | |
696 | ||
697 | /* Undefine all macros and assertions. */ | |
698 | ||
699 | void | |
700 | cpp_undef_all (cpp_reader *pfile) | |
701 | { | |
702 | cpp_forall_identifiers (pfile, undefine_macros, NULL); | |
703 | } | |
704 | ||
705 | ||
93c80368 NB |
706 | /* Helper routine used by parse_include. Reinterpret the current line |
707 | as an h-char-sequence (< ... >); we are looking at the first token | |
74eb4b3e NB |
708 | after the <. Returns a malloced filename. */ |
709 | static char * | |
6cf87ca4 | 710 | glue_header_name (cpp_reader *pfile) |
93c80368 | 711 | { |
4ed5bcfb | 712 | const cpp_token *token; |
74eb4b3e | 713 | char *buffer; |
2450e0b8 | 714 | size_t len, total_len = 0, capacity = 1024; |
93c80368 NB |
715 | |
716 | /* To avoid lexed tokens overwriting our glued name, we can only | |
717 | allocate from the string pool once we've lexed everything. */ | |
c3f829c1 | 718 | buffer = XNEWVEC (char, capacity); |
93c80368 NB |
719 | for (;;) |
720 | { | |
a8d0ddaf | 721 | token = get_token_no_padding (pfile); |
93c80368 | 722 | |
74eb4b3e | 723 | if (token->type == CPP_GREATER) |
93c80368 | 724 | break; |
74eb4b3e NB |
725 | if (token->type == CPP_EOF) |
726 | { | |
0527bc4e | 727 | cpp_error (pfile, CPP_DL_ERROR, "missing terminating > character"); |
74eb4b3e NB |
728 | break; |
729 | } | |
93c80368 | 730 | |
59325650 | 731 | len = cpp_token_len (token) + 2; /* Leading space, terminating \0. */ |
2450e0b8 | 732 | if (total_len + len > capacity) |
93c80368 | 733 | { |
2450e0b8 | 734 | capacity = (capacity + len) * 2; |
c3f829c1 | 735 | buffer = XRESIZEVEC (char, buffer, capacity); |
93c80368 NB |
736 | } |
737 | ||
4ed5bcfb | 738 | if (token->flags & PREV_WHITE) |
2450e0b8 | 739 | buffer[total_len++] = ' '; |
93c80368 | 740 | |
47e20491 GK |
741 | total_len = (cpp_spell_token (pfile, token, (uchar *) &buffer[total_len], |
742 | true) | |
74eb4b3e | 743 | - (uchar *) buffer); |
93c80368 | 744 | } |
041c3194 | 745 | |
74eb4b3e NB |
746 | buffer[total_len] = '\0'; |
747 | return buffer; | |
93c80368 | 748 | } |
7f2935c7 | 749 | |
74eb4b3e NB |
750 | /* Returns the file name of #include, #include_next, #import and |
751 | #pragma dependency. The string is malloced and the caller should | |
a28fbdba MLI |
752 | free it. Returns NULL on error. LOCATION is the source location |
753 | of the file name. */ | |
754 | ||
74eb4b3e | 755 | static const char * |
cbc43ae0 | 756 | parse_include (cpp_reader *pfile, int *pangle_brackets, |
620e594b | 757 | const cpp_token ***buf, location_t *location) |
7f2935c7 | 758 | { |
74eb4b3e | 759 | char *fname; |
4ed5bcfb | 760 | const cpp_token *header; |
7f2935c7 | 761 | |
93c80368 | 762 | /* Allow macro expansion. */ |
a8d0ddaf | 763 | header = get_token_no_padding (pfile); |
a28fbdba | 764 | *location = header->src_loc; |
2c6e3f55 JJ |
765 | if ((header->type == CPP_STRING && header->val.str.text[0] != 'R') |
766 | || header->type == CPP_HEADER_NAME) | |
7f2935c7 | 767 | { |
c3f829c1 | 768 | fname = XNEWVEC (char, header->val.str.len - 1); |
6338b358 NB |
769 | memcpy (fname, header->val.str.text + 1, header->val.str.len - 2); |
770 | fname[header->val.str.len - 2] = '\0'; | |
74eb4b3e | 771 | *pangle_brackets = header->type == CPP_HEADER_NAME; |
7f2935c7 | 772 | } |
74eb4b3e | 773 | else if (header->type == CPP_LESS) |
7f2935c7 | 774 | { |
74eb4b3e NB |
775 | fname = glue_header_name (pfile); |
776 | *pangle_brackets = 1; | |
777 | } | |
778 | else | |
779 | { | |
780 | const unsigned char *dir; | |
781 | ||
782 | if (pfile->directive == &dtable[T_PRAGMA]) | |
b6baa67d | 783 | dir = UC"pragma dependency"; |
74eb4b3e NB |
784 | else |
785 | dir = pfile->directive->name; | |
0527bc4e | 786 | cpp_error (pfile, CPP_DL_ERROR, "#%s expects \"FILENAME\" or <FILENAME>", |
74eb4b3e NB |
787 | dir); |
788 | ||
4ed5bcfb | 789 | return NULL; |
7f2935c7 | 790 | } |
7f2935c7 | 791 | |
cda5e672 TT |
792 | if (pfile->directive == &dtable[T_PRAGMA]) |
793 | { | |
794 | /* This pragma allows extra tokens after the file name. */ | |
795 | } | |
796 | else if (buf == NULL || CPP_OPTION (pfile, discard_comments)) | |
61cc8223 | 797 | check_eol (pfile, true); |
cbc43ae0 ILT |
798 | else |
799 | { | |
800 | /* If we are not discarding comments, then gather them while | |
801 | doing the eol check. */ | |
802 | *buf = check_eol_return_comments (pfile); | |
803 | } | |
804 | ||
74eb4b3e | 805 | return fname; |
168d3732 | 806 | } |
3caee4a8 | 807 | |
ba133c96 | 808 | /* Handle #include, #include_next and #import. */ |
711b8824 | 809 | static void |
6cf87ca4 | 810 | do_include_common (cpp_reader *pfile, enum include_type type) |
168d3732 | 811 | { |
74eb4b3e NB |
812 | const char *fname; |
813 | int angle_brackets; | |
cbc43ae0 | 814 | const cpp_token **buf = NULL; |
620e594b | 815 | location_t location; |
cbc43ae0 ILT |
816 | |
817 | /* Re-enable saving of comments if requested, so that the include | |
818 | callback can dump comments which follow #include. */ | |
819 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
74eb4b3e | 820 | |
a28fbdba | 821 | fname = parse_include (pfile, &angle_brackets, &buf, &location); |
74eb4b3e | 822 | if (!fname) |
705b0c05 | 823 | goto done; |
7f2935c7 | 824 | |
28303828 | 825 | if (!*fname) |
705b0c05 NS |
826 | { |
827 | cpp_error_with_line (pfile, CPP_DL_ERROR, location, 0, | |
828 | "empty filename in #%s", | |
829 | pfile->directive->name); | |
830 | goto done; | |
831 | } | |
28303828 | 832 | |
3963c2e0 | 833 | /* Prevent #include recursion. */ |
1c6ffbab QZ |
834 | if (pfile->line_table->depth >= CPP_OPTION (pfile, max_include_depth)) |
835 | cpp_error (pfile, | |
836 | CPP_DL_ERROR, | |
837 | "#include nested depth %u exceeds maximum of %u" | |
838 | " (use -fmax-include-depth=DEPTH to increase the maximum)", | |
839 | pfile->line_table->depth, | |
840 | CPP_OPTION (pfile, max_include_depth)); | |
74eb4b3e | 841 | else |
09b82253 | 842 | { |
74eb4b3e NB |
843 | /* Get out of macro context, if we are. */ |
844 | skip_rest_of_line (pfile); | |
09b82253 | 845 | |
74eb4b3e | 846 | if (pfile->cb.include) |
6cf87ca4 | 847 | pfile->cb.include (pfile, pfile->directive_line, |
cbc43ae0 ILT |
848 | pfile->directive->name, fname, angle_brackets, |
849 | buf); | |
3963c2e0 | 850 | |
ac81cf0b | 851 | _cpp_stack_include (pfile, fname, angle_brackets, type, location); |
74eb4b3e | 852 | } |
3963c2e0 | 853 | |
705b0c05 | 854 | done: |
cbc43ae0 ILT |
855 | XDELETEVEC (fname); |
856 | if (buf) | |
857 | XDELETEVEC (buf); | |
168d3732 | 858 | } |
e8037d57 | 859 | |
711b8824 | 860 | static void |
6cf87ca4 | 861 | do_include (cpp_reader *pfile) |
168d3732 | 862 | { |
ba133c96 NB |
863 | do_include_common (pfile, IT_INCLUDE); |
864 | } | |
168d3732 | 865 | |
ba133c96 | 866 | static void |
6cf87ca4 | 867 | do_import (cpp_reader *pfile) |
ba133c96 | 868 | { |
ba133c96 | 869 | do_include_common (pfile, IT_IMPORT); |
168d3732 | 870 | } |
7f2935c7 | 871 | |
711b8824 | 872 | static void |
6cf87ca4 | 873 | do_include_next (cpp_reader *pfile) |
168d3732 | 874 | { |
3963c2e0 ZW |
875 | enum include_type type = IT_INCLUDE_NEXT; |
876 | ||
877 | /* If this is the primary source file, warn and use the normal | |
878 | search logic. */ | |
705e2d28 | 879 | if (cpp_in_primary_file (pfile)) |
3963c2e0 | 880 | { |
0527bc4e | 881 | cpp_error (pfile, CPP_DL_WARNING, |
3963c2e0 ZW |
882 | "#include_next in primary source file"); |
883 | type = IT_INCLUDE; | |
884 | } | |
885 | do_include_common (pfile, type); | |
7f2935c7 | 886 | } |
7f2935c7 | 887 | |
dcc229e5 ZW |
888 | /* Subroutine of do_linemarker. Read possible flags after file name. |
889 | LAST is the last flag seen; 0 if this is the first flag. Return the | |
890 | flag if it is valid, 0 at the end of the directive. Otherwise | |
891 | complain. */ | |
642ce434 | 892 | static unsigned int |
6cf87ca4 | 893 | read_flag (cpp_reader *pfile, unsigned int last) |
d3a34a0a | 894 | { |
345894b4 | 895 | const cpp_token *token = _cpp_lex_token (pfile); |
d3a34a0a | 896 | |
345894b4 | 897 | if (token->type == CPP_NUMBER && token->val.str.len == 1) |
d3a34a0a | 898 | { |
345894b4 | 899 | unsigned int flag = token->val.str.text[0] - '0'; |
28e0f040 NB |
900 | |
901 | if (flag > last && flag <= 4 | |
902 | && (flag != 4 || last == 3) | |
903 | && (flag != 2 || last == 0)) | |
904 | return flag; | |
d3a34a0a | 905 | } |
93c80368 | 906 | |
345894b4 | 907 | if (token->type != CPP_EOF) |
0527bc4e | 908 | cpp_error (pfile, CPP_DL_ERROR, "invalid flag \"%s\" in line directive", |
345894b4 | 909 | cpp_token_as_text (pfile, token)); |
93c80368 | 910 | return 0; |
d3a34a0a JM |
911 | } |
912 | ||
dcc229e5 | 913 | /* Subroutine of do_line and do_linemarker. Convert a number in STR, |
3b8f20a1 MLI |
914 | of length LEN, to binary; store it in NUMP, and return false if the |
915 | number was well-formed, true if not. WRAPPED is set to true if the | |
916 | number did not fit into 'unsigned long'. */ | |
917 | static bool | |
918 | strtolinenum (const uchar *str, size_t len, linenum_type *nump, bool *wrapped) | |
041c3194 | 919 | { |
1bb64668 | 920 | linenum_type reg = 0; |
3b8f20a1 MLI |
921 | linenum_type reg_prev = 0; |
922 | ||
562a5c27 | 923 | uchar c; |
3b8f20a1 | 924 | *wrapped = false; |
041c3194 ZW |
925 | while (len--) |
926 | { | |
927 | c = *str++; | |
928 | if (!ISDIGIT (c)) | |
3b8f20a1 | 929 | return true; |
041c3194 ZW |
930 | reg *= 10; |
931 | reg += c - '0'; | |
3b8f20a1 MLI |
932 | if (reg < reg_prev) |
933 | *wrapped = true; | |
934 | reg_prev = reg; | |
041c3194 ZW |
935 | } |
936 | *nump = reg; | |
3b8f20a1 | 937 | return false; |
041c3194 ZW |
938 | } |
939 | ||
6de1e2a9 | 940 | /* Interpret #line command. |
dcc229e5 ZW |
941 | Note that the filename string (if any) is a true string constant |
942 | (escapes are interpreted), unlike in #line. */ | |
711b8824 | 943 | static void |
6cf87ca4 | 944 | do_line (cpp_reader *pfile) |
7f2935c7 | 945 | { |
99b1c316 | 946 | class line_maps *line_table = pfile->line_table; |
0e50b624 | 947 | const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table); |
2203a881 DP |
948 | |
949 | /* skip_rest_of_line() may cause line table to be realloc()ed so note down | |
950 | sysp right now. */ | |
951 | ||
46427374 | 952 | unsigned char map_sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (map); |
4ed5bcfb | 953 | const cpp_token *token; |
46427374 | 954 | const char *new_file = ORDINARY_MAP_FILE_NAME (map); |
1bb64668 | 955 | linenum_type new_lineno; |
93c80368 | 956 | |
27e2564a | 957 | /* C99 raised the minimum limit on #line numbers. */ |
1bb64668 | 958 | linenum_type cap = CPP_OPTION (pfile, c99) ? 2147483647 : 32767; |
3b8f20a1 | 959 | bool wrapped; |
18a9d8ff | 960 | |
93c80368 | 961 | /* #line commands expand macros. */ |
4ed5bcfb NB |
962 | token = cpp_get_token (pfile); |
963 | if (token->type != CPP_NUMBER | |
1bb64668 | 964 | || strtolinenum (token->val.str.text, token->val.str.len, |
3b8f20a1 | 965 | &new_lineno, &wrapped)) |
7f2935c7 | 966 | { |
33ae4837 TT |
967 | if (token->type == CPP_EOF) |
968 | cpp_error (pfile, CPP_DL_ERROR, "unexpected end of file after #line"); | |
969 | else | |
970 | cpp_error (pfile, CPP_DL_ERROR, | |
971 | "\"%s\" after #line is not a positive integer", | |
972 | cpp_token_as_text (pfile, token)); | |
9ec7291f | 973 | return; |
df383483 | 974 | } |
7f2935c7 | 975 | |
3b8f20a1 | 976 | if (CPP_PEDANTIC (pfile) && (new_lineno == 0 || new_lineno > cap || wrapped)) |
0527bc4e | 977 | cpp_error (pfile, CPP_DL_PEDWARN, "line number out of range"); |
3b8f20a1 MLI |
978 | else if (wrapped) |
979 | cpp_error (pfile, CPP_DL_WARNING, "line number out of range"); | |
7f2935c7 | 980 | |
4ed5bcfb NB |
981 | token = cpp_get_token (pfile); |
982 | if (token->type == CPP_STRING) | |
5538ada6 | 983 | { |
e6cc3a24 | 984 | cpp_string s = { 0, 0 }; |
423e95e2 | 985 | if (cpp_interpret_string_notranslate (pfile, &token->val.str, 1, |
f1bf410c | 986 | &s, CPP_STRING)) |
e6cc3a24 | 987 | new_file = (const char *)s.text; |
a5cb563b | 988 | check_eol (pfile, true); |
dcc229e5 ZW |
989 | } |
990 | else if (token->type != CPP_EOF) | |
991 | { | |
0527bc4e | 992 | cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", |
dcc229e5 ZW |
993 | cpp_token_as_text (pfile, token)); |
994 | return; | |
995 | } | |
996 | ||
997 | skip_rest_of_line (pfile); | |
c7f9c0b9 | 998 | _cpp_do_file_change (pfile, LC_RENAME_VERBATIM, new_file, new_lineno, |
2203a881 | 999 | map_sysp); |
c3388e62 | 1000 | line_table->seen_line_directive = true; |
dcc229e5 ZW |
1001 | } |
1002 | ||
1003 | /* Interpret the # 44 "file" [flags] notation, which has slightly | |
1004 | different syntax and semantics from #line: Flags are allowed, | |
1005 | and we never complain about the line number being too big. */ | |
1006 | static void | |
6cf87ca4 | 1007 | do_linemarker (cpp_reader *pfile) |
dcc229e5 | 1008 | { |
99b1c316 | 1009 | class line_maps *line_table = pfile->line_table; |
0e50b624 | 1010 | const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table); |
dcc229e5 | 1011 | const cpp_token *token; |
46427374 | 1012 | const char *new_file = ORDINARY_MAP_FILE_NAME (map); |
1bb64668 | 1013 | linenum_type new_lineno; |
46427374 | 1014 | unsigned int new_sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (map); |
c7f9c0b9 | 1015 | enum lc_reason reason = LC_RENAME_VERBATIM; |
dcc229e5 | 1016 | int flag; |
3b8f20a1 | 1017 | bool wrapped; |
dcc229e5 ZW |
1018 | |
1019 | /* Back up so we can get the number again. Putting this in | |
1020 | _cpp_handle_directive risks two calls to _cpp_backup_tokens in | |
1021 | some circumstances, which can segfault. */ | |
1022 | _cpp_backup_tokens (pfile, 1); | |
1023 | ||
1024 | /* #line commands expand macros. */ | |
1025 | token = cpp_get_token (pfile); | |
1026 | if (token->type != CPP_NUMBER | |
1bb64668 | 1027 | || strtolinenum (token->val.str.text, token->val.str.len, |
3b8f20a1 | 1028 | &new_lineno, &wrapped)) |
dcc229e5 | 1029 | { |
33ae4837 TT |
1030 | /* Unlike #line, there does not seem to be a way to get an EOF |
1031 | here. So, it should be safe to always spell the token. */ | |
0527bc4e JDA |
1032 | cpp_error (pfile, CPP_DL_ERROR, |
1033 | "\"%s\" after # is not a positive integer", | |
dcc229e5 ZW |
1034 | cpp_token_as_text (pfile, token)); |
1035 | return; | |
df383483 | 1036 | } |
941e09b6 | 1037 | |
dcc229e5 ZW |
1038 | token = cpp_get_token (pfile); |
1039 | if (token->type == CPP_STRING) | |
1040 | { | |
e6cc3a24 | 1041 | cpp_string s = { 0, 0 }; |
423e95e2 | 1042 | if (cpp_interpret_string_notranslate (pfile, &token->val.str, |
f1bf410c | 1043 | 1, &s, CPP_STRING)) |
e6cc3a24 | 1044 | new_file = (const char *)s.text; |
cf551fba | 1045 | |
dcc229e5 ZW |
1046 | new_sysp = 0; |
1047 | flag = read_flag (pfile, 0); | |
1048 | if (flag == 1) | |
1049 | { | |
1050 | reason = LC_ENTER; | |
1051 | /* Fake an include for cpp_included (). */ | |
1052 | _cpp_fake_include (pfile, new_file); | |
1053 | flag = read_flag (pfile, flag); | |
1054 | } | |
1055 | else if (flag == 2) | |
1056 | { | |
1057 | reason = LC_LEAVE; | |
1058 | flag = read_flag (pfile, flag); | |
1059 | } | |
1060 | if (flag == 3) | |
93c80368 | 1061 | { |
dcc229e5 ZW |
1062 | new_sysp = 1; |
1063 | flag = read_flag (pfile, flag); | |
1064 | if (flag == 4) | |
1065 | new_sysp = 2; | |
93c80368 | 1066 | } |
9d30f270 | 1067 | pfile->buffer->sysp = new_sysp; |
dcc229e5 | 1068 | |
a5cb563b | 1069 | check_eol (pfile, false); |
041c3194 | 1070 | } |
4ed5bcfb | 1071 | else if (token->type != CPP_EOF) |
27e2564a | 1072 | { |
0527bc4e | 1073 | cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", |
4ed5bcfb | 1074 | cpp_token_as_text (pfile, token)); |
27e2564a NB |
1075 | return; |
1076 | } | |
7f2935c7 | 1077 | |
bdcbe496 | 1078 | skip_rest_of_line (pfile); |
00b0c19b | 1079 | |
3caf0ca1 BS |
1080 | if (reason == LC_LEAVE) |
1081 | { | |
12de2245 BS |
1082 | /* Reread map since cpp_get_token can invalidate it with a |
1083 | reallocation. */ | |
1084 | map = LINEMAPS_LAST_ORDINARY_MAP (line_table); | |
f10a9135 NS |
1085 | const line_map_ordinary *from |
1086 | = linemap_included_from_linemap (line_table, map); | |
3caf0ca1 | 1087 | if (MAIN_FILE_P (map) |
f10a9135 | 1088 | || (from |
3caf0ca1 BS |
1089 | && filename_cmp (ORDINARY_MAP_FILE_NAME (from), new_file) != 0)) |
1090 | { | |
1091 | cpp_warning (pfile, CPP_W_NONE, | |
12de2245 BS |
1092 | "file \"%s\" linemarker ignored due to " |
1093 | "incorrect nesting", new_file); | |
3caf0ca1 BS |
1094 | return; |
1095 | } | |
1096 | } | |
00b0c19b MLI |
1097 | /* Compensate for the increment in linemap_add that occurs in |
1098 | _cpp_do_file_change. We're currently at the start of the line | |
620e594b | 1099 | *following* the #line directive. A separate location_t for this |
00b0c19b MLI |
1100 | location makes no sense (until we do the LC_LEAVE), and |
1101 | complicates LAST_SOURCE_LINE_LOCATION. */ | |
1102 | pfile->line_table->highest_location--; | |
1103 | ||
bb74c963 | 1104 | _cpp_do_file_change (pfile, reason, new_file, new_lineno, new_sysp); |
c3388e62 | 1105 | line_table->seen_line_directive = true; |
27e2564a NB |
1106 | } |
1107 | ||
67821e3a | 1108 | /* Arrange the file_change callback. pfile->line has changed to |
47d89cf3 | 1109 | FILE_LINE of TO_FILE, for reason REASON. SYSP is 1 for a system |
a1f300c0 | 1110 | header, 2 for a system header that needs to be extern "C" protected, |
47d89cf3 | 1111 | and zero otherwise. */ |
eb1f4d9d | 1112 | void |
6cf87ca4 | 1113 | _cpp_do_file_change (cpp_reader *pfile, enum lc_reason reason, |
1bb64668 | 1114 | const char *to_file, linenum_type file_line, |
6cf87ca4 | 1115 | unsigned int sysp) |
27e2564a | 1116 | { |
0e50b624 | 1117 | linemap_assert (reason != LC_ENTER_MACRO); |
12f9df4e PB |
1118 | const struct line_map *map = linemap_add (pfile->line_table, reason, sysp, |
1119 | to_file, file_line); | |
0e50b624 | 1120 | const line_map_ordinary *ord_map = NULL; |
500bee0a | 1121 | if (map != NULL) |
0e50b624 DM |
1122 | { |
1123 | ord_map = linemap_check_ordinary (map); | |
1124 | linemap_line_start (pfile->line_table, | |
1125 | ORDINARY_MAP_STARTING_LINE_NUMBER (ord_map), | |
1126 | 127); | |
1127 | } | |
d82fc108 | 1128 | |
eb1f4d9d | 1129 | if (pfile->cb.file_change) |
0e50b624 | 1130 | pfile->cb.file_change (pfile, ord_map); |
7f2935c7 | 1131 | } |
941e09b6 | 1132 | |
5d8ebbd8 NB |
1133 | /* Report a warning or error detected by the program we are |
1134 | processing. Use the directive's tokens in the error message. */ | |
711b8824 | 1135 | static void |
c24300ba DM |
1136 | do_diagnostic (cpp_reader *pfile, enum cpp_diagnostic_level code, |
1137 | enum cpp_warning_reason reason, int print_dir) | |
7f2935c7 | 1138 | { |
5d6342eb TT |
1139 | const unsigned char *dir_name; |
1140 | unsigned char *line; | |
620e594b | 1141 | location_t src_loc = pfile->cur_token[-1].src_loc; |
5d6342eb TT |
1142 | |
1143 | if (print_dir) | |
1144 | dir_name = pfile->directive->name; | |
1145 | else | |
1146 | dir_name = NULL; | |
1147 | pfile->state.prevent_expansion++; | |
1148 | line = cpp_output_line_to_string (pfile, dir_name); | |
1149 | pfile->state.prevent_expansion--; | |
1150 | ||
87cf0651 SB |
1151 | if (code == CPP_DL_WARNING_SYSHDR && reason) |
1152 | cpp_warning_with_line_syshdr (pfile, reason, src_loc, 0, "%s", line); | |
1153 | else if (code == CPP_DL_WARNING && reason) | |
1154 | cpp_warning_with_line (pfile, reason, src_loc, 0, "%s", line); | |
1155 | else | |
1156 | cpp_error_with_line (pfile, code, src_loc, 0, "%s", line); | |
5d6342eb | 1157 | free (line); |
7f2935c7 PB |
1158 | } |
1159 | ||
838f313b | 1160 | static void |
6cf87ca4 | 1161 | do_error (cpp_reader *pfile) |
838f313b | 1162 | { |
c24300ba | 1163 | do_diagnostic (pfile, CPP_DL_ERROR, CPP_W_NONE, 1); |
838f313b | 1164 | } |
7f2935c7 | 1165 | |
711b8824 | 1166 | static void |
6cf87ca4 | 1167 | do_warning (cpp_reader *pfile) |
7f2935c7 | 1168 | { |
2f878973 | 1169 | /* We want #warning diagnostics to be emitted in system headers too. */ |
87cf0651 | 1170 | do_diagnostic (pfile, CPP_DL_WARNING_SYSHDR, CPP_W_WARNING_DIRECTIVE, 1); |
7f2935c7 PB |
1171 | } |
1172 | ||
a2a76ce7 | 1173 | /* Report program identification. */ |
711b8824 | 1174 | static void |
6cf87ca4 | 1175 | do_ident (cpp_reader *pfile) |
7f2935c7 | 1176 | { |
4ed5bcfb | 1177 | const cpp_token *str = cpp_get_token (pfile); |
58fea6af | 1178 | |
4ed5bcfb | 1179 | if (str->type != CPP_STRING) |
1ed17cd5 ZW |
1180 | cpp_error (pfile, CPP_DL_ERROR, "invalid #%s directive", |
1181 | pfile->directive->name); | |
93c80368 | 1182 | else if (pfile->cb.ident) |
6cf87ca4 | 1183 | pfile->cb.ident (pfile, pfile->directive_line, &str->val.str); |
a2a76ce7 | 1184 | |
a5cb563b | 1185 | check_eol (pfile, false); |
7f2935c7 PB |
1186 | } |
1187 | ||
a5da89c6 NB |
1188 | /* Lookup a PRAGMA name in a singly-linked CHAIN. Returns the |
1189 | matching entry, or NULL if none is found. The returned entry could | |
1190 | be the start of a namespace chain, or a pragma. */ | |
1191 | static struct pragma_entry * | |
6cf87ca4 | 1192 | lookup_pragma_entry (struct pragma_entry *chain, const cpp_hashnode *pragma) |
82443371 | 1193 | { |
4b115ff0 NB |
1194 | while (chain && chain->pragma != pragma) |
1195 | chain = chain->next; | |
a5da89c6 NB |
1196 | |
1197 | return chain; | |
1198 | } | |
1199 | ||
bc4071dd RH |
1200 | /* Create and insert a blank pragma entry at the beginning of a |
1201 | singly-linked CHAIN. */ | |
a5da89c6 | 1202 | static struct pragma_entry * |
bc4071dd | 1203 | new_pragma_entry (cpp_reader *pfile, struct pragma_entry **chain) |
82443371 | 1204 | { |
c3f829c1 | 1205 | struct pragma_entry *new_entry; |
58fea6af | 1206 | |
c3f829c1 | 1207 | new_entry = (struct pragma_entry *) |
8c3b2693 | 1208 | _cpp_aligned_alloc (pfile, sizeof (struct pragma_entry)); |
58fea6af | 1209 | |
bc4071dd | 1210 | memset (new_entry, 0, sizeof (struct pragma_entry)); |
c3f829c1 | 1211 | new_entry->next = *chain; |
bc4071dd | 1212 | |
c3f829c1 GDR |
1213 | *chain = new_entry; |
1214 | return new_entry; | |
58fea6af | 1215 | } |
82443371 | 1216 | |
a5da89c6 | 1217 | /* Register a pragma NAME in namespace SPACE. If SPACE is null, it |
bc4071dd RH |
1218 | goes in the global namespace. */ |
1219 | static struct pragma_entry * | |
1220 | register_pragma_1 (cpp_reader *pfile, const char *space, const char *name, | |
1221 | bool allow_name_expansion) | |
82443371 | 1222 | { |
a5da89c6 NB |
1223 | struct pragma_entry **chain = &pfile->pragmas; |
1224 | struct pragma_entry *entry; | |
4b115ff0 | 1225 | const cpp_hashnode *node; |
a5da89c6 | 1226 | |
a5da89c6 | 1227 | if (space) |
58fea6af | 1228 | { |
b6baa67d | 1229 | node = cpp_lookup (pfile, UC space, strlen (space)); |
4b115ff0 | 1230 | entry = lookup_pragma_entry (*chain, node); |
a5da89c6 | 1231 | if (!entry) |
bc4071dd RH |
1232 | { |
1233 | entry = new_pragma_entry (pfile, chain); | |
1234 | entry->pragma = node; | |
1235 | entry->is_nspace = true; | |
1236 | entry->allow_expansion = allow_name_expansion; | |
1237 | } | |
a5da89c6 NB |
1238 | else if (!entry->is_nspace) |
1239 | goto clash; | |
bc4071dd RH |
1240 | else if (entry->allow_expansion != allow_name_expansion) |
1241 | { | |
1242 | cpp_error (pfile, CPP_DL_ICE, | |
1243 | "registering pragmas in namespace \"%s\" with mismatched " | |
1244 | "name expansion", space); | |
1245 | return NULL; | |
1246 | } | |
a5da89c6 | 1247 | chain = &entry->u.space; |
58fea6af | 1248 | } |
bc4071dd RH |
1249 | else if (allow_name_expansion) |
1250 | { | |
1251 | cpp_error (pfile, CPP_DL_ICE, | |
1252 | "registering pragma \"%s\" with name expansion " | |
1253 | "and no namespace", name); | |
1254 | return NULL; | |
1255 | } | |
58fea6af | 1256 | |
a5da89c6 | 1257 | /* Check for duplicates. */ |
b6baa67d | 1258 | node = cpp_lookup (pfile, UC name, strlen (name)); |
4b115ff0 | 1259 | entry = lookup_pragma_entry (*chain, node); |
bc4071dd | 1260 | if (entry == NULL) |
a5da89c6 | 1261 | { |
bc4071dd RH |
1262 | entry = new_pragma_entry (pfile, chain); |
1263 | entry->pragma = node; | |
1264 | return entry; | |
a5da89c6 | 1265 | } |
bc4071dd RH |
1266 | |
1267 | if (entry->is_nspace) | |
1268 | clash: | |
1269 | cpp_error (pfile, CPP_DL_ICE, | |
1270 | "registering \"%s\" as both a pragma and a pragma namespace", | |
1271 | NODE_NAME (node)); | |
1272 | else if (space) | |
1273 | cpp_error (pfile, CPP_DL_ICE, "#pragma %s %s is already registered", | |
1274 | space, name); | |
a5da89c6 | 1275 | else |
bc4071dd RH |
1276 | cpp_error (pfile, CPP_DL_ICE, "#pragma %s is already registered", name); |
1277 | ||
1278 | return NULL; | |
1279 | } | |
1280 | ||
1281 | /* Register a cpplib internal pragma SPACE NAME with HANDLER. */ | |
1282 | static void | |
1283 | register_pragma_internal (cpp_reader *pfile, const char *space, | |
1284 | const char *name, pragma_cb handler) | |
1285 | { | |
1286 | struct pragma_entry *entry; | |
1287 | ||
1288 | entry = register_pragma_1 (pfile, space, name, false); | |
1289 | entry->is_internal = true; | |
1290 | entry->u.handler = handler; | |
21b11495 ZW |
1291 | } |
1292 | ||
1293 | /* Register a pragma NAME in namespace SPACE. If SPACE is null, it | |
1294 | goes in the global namespace. HANDLER is the handler it will call, | |
b5b3e36a DJ |
1295 | which must be non-NULL. If ALLOW_EXPANSION is set, allow macro |
1296 | expansion while parsing pragma NAME. This function is exported | |
1297 | from libcpp. */ | |
21b11495 ZW |
1298 | void |
1299 | cpp_register_pragma (cpp_reader *pfile, const char *space, const char *name, | |
b5b3e36a | 1300 | pragma_cb handler, bool allow_expansion) |
21b11495 | 1301 | { |
bc4071dd RH |
1302 | struct pragma_entry *entry; |
1303 | ||
1304 | if (!handler) | |
1305 | { | |
1306 | cpp_error (pfile, CPP_DL_ICE, "registering pragma with NULL handler"); | |
1307 | return; | |
1308 | } | |
1309 | ||
1310 | entry = register_pragma_1 (pfile, space, name, false); | |
1311 | if (entry) | |
1312 | { | |
1313 | entry->allow_expansion = allow_expansion; | |
1314 | entry->u.handler = handler; | |
1315 | } | |
58fea6af | 1316 | } |
a5da89c6 | 1317 | |
bc4071dd RH |
1318 | /* Similarly, but create mark the pragma for deferred processing. |
1319 | When found, a CPP_PRAGMA token will be insertted into the stream | |
1320 | with IDENT in the token->u.pragma slot. */ | |
1321 | void | |
1322 | cpp_register_deferred_pragma (cpp_reader *pfile, const char *space, | |
1323 | const char *name, unsigned int ident, | |
1324 | bool allow_expansion, bool allow_name_expansion) | |
1325 | { | |
1326 | struct pragma_entry *entry; | |
1327 | ||
1328 | entry = register_pragma_1 (pfile, space, name, allow_name_expansion); | |
1329 | if (entry) | |
1330 | { | |
1331 | entry->is_deferred = true; | |
1332 | entry->allow_expansion = allow_expansion; | |
1333 | entry->u.ident = ident; | |
1334 | } | |
1335 | } | |
1336 | ||
a5da89c6 | 1337 | /* Register the pragmas the preprocessor itself handles. */ |
58fea6af | 1338 | void |
6cf87ca4 | 1339 | _cpp_init_internal_pragmas (cpp_reader *pfile) |
58fea6af | 1340 | { |
a5da89c6 | 1341 | /* Pragmas in the global namespace. */ |
bc4071dd | 1342 | register_pragma_internal (pfile, 0, "once", do_pragma_once); |
17e7cb85 KT |
1343 | register_pragma_internal (pfile, 0, "push_macro", do_pragma_push_macro); |
1344 | register_pragma_internal (pfile, 0, "pop_macro", do_pragma_pop_macro); | |
58fea6af | 1345 | |
a5da89c6 | 1346 | /* New GCC-specific pragmas should be put in the GCC namespace. */ |
bc4071dd RH |
1347 | register_pragma_internal (pfile, "GCC", "poison", do_pragma_poison); |
1348 | register_pragma_internal (pfile, "GCC", "system_header", | |
1349 | do_pragma_system_header); | |
1350 | register_pragma_internal (pfile, "GCC", "dependency", do_pragma_dependency); | |
f591bd8f FW |
1351 | register_pragma_internal (pfile, "GCC", "warning", do_pragma_warning); |
1352 | register_pragma_internal (pfile, "GCC", "error", do_pragma_error); | |
82443371 | 1353 | } |
7f2935c7 | 1354 | |
17211ab5 GK |
1355 | /* Return the number of registered pragmas in PE. */ |
1356 | ||
1357 | static int | |
6cf87ca4 | 1358 | count_registered_pragmas (struct pragma_entry *pe) |
17211ab5 GK |
1359 | { |
1360 | int ct = 0; | |
1361 | for (; pe != NULL; pe = pe->next) | |
1362 | { | |
1363 | if (pe->is_nspace) | |
1364 | ct += count_registered_pragmas (pe->u.space); | |
1365 | ct++; | |
1366 | } | |
1367 | return ct; | |
1368 | } | |
1369 | ||
1370 | /* Save into SD the names of the registered pragmas referenced by PE, | |
1371 | and return a pointer to the next free space in SD. */ | |
1372 | ||
1373 | static char ** | |
6cf87ca4 | 1374 | save_registered_pragmas (struct pragma_entry *pe, char **sd) |
17211ab5 GK |
1375 | { |
1376 | for (; pe != NULL; pe = pe->next) | |
1377 | { | |
1378 | if (pe->is_nspace) | |
1379 | sd = save_registered_pragmas (pe->u.space, sd); | |
c3f829c1 GDR |
1380 | *sd++ = (char *) xmemdup (HT_STR (&pe->pragma->ident), |
1381 | HT_LEN (&pe->pragma->ident), | |
1382 | HT_LEN (&pe->pragma->ident) + 1); | |
17211ab5 GK |
1383 | } |
1384 | return sd; | |
1385 | } | |
1386 | ||
1387 | /* Return a newly-allocated array which saves the names of the | |
1388 | registered pragmas. */ | |
1389 | ||
1390 | char ** | |
6cf87ca4 | 1391 | _cpp_save_pragma_names (cpp_reader *pfile) |
17211ab5 GK |
1392 | { |
1393 | int ct = count_registered_pragmas (pfile->pragmas); | |
72bb2c39 | 1394 | char **result = XNEWVEC (char *, ct); |
17211ab5 GK |
1395 | (void) save_registered_pragmas (pfile->pragmas, result); |
1396 | return result; | |
1397 | } | |
1398 | ||
1399 | /* Restore from SD the names of the registered pragmas referenced by PE, | |
1400 | and return a pointer to the next unused name in SD. */ | |
1401 | ||
1402 | static char ** | |
6cf87ca4 ZW |
1403 | restore_registered_pragmas (cpp_reader *pfile, struct pragma_entry *pe, |
1404 | char **sd) | |
17211ab5 GK |
1405 | { |
1406 | for (; pe != NULL; pe = pe->next) | |
1407 | { | |
1408 | if (pe->is_nspace) | |
1409 | sd = restore_registered_pragmas (pfile, pe->u.space, sd); | |
b6baa67d | 1410 | pe->pragma = cpp_lookup (pfile, UC *sd, strlen (*sd)); |
17211ab5 GK |
1411 | free (*sd); |
1412 | sd++; | |
1413 | } | |
1414 | return sd; | |
1415 | } | |
1416 | ||
1417 | /* Restore the names of the registered pragmas from SAVED. */ | |
1418 | ||
1419 | void | |
6cf87ca4 | 1420 | _cpp_restore_pragma_names (cpp_reader *pfile, char **saved) |
17211ab5 GK |
1421 | { |
1422 | (void) restore_registered_pragmas (pfile, pfile->pragmas, saved); | |
1423 | free (saved); | |
1424 | } | |
1425 | ||
a5da89c6 NB |
1426 | /* Pragmata handling. We handle some, and pass the rest on to the |
1427 | front end. C99 defines three pragmas and says that no macro | |
1428 | expansion is to be performed on them; whether or not macro | |
1429 | expansion happens for other pragmas is implementation defined. | |
bc4071dd RH |
1430 | This implementation allows for a mix of both, since GCC did not |
1431 | traditionally macro expand its (few) pragmas, whereas OpenMP | |
1432 | specifies that macro expansion should happen. */ | |
711b8824 | 1433 | static void |
6cf87ca4 | 1434 | do_pragma (cpp_reader *pfile) |
7f2935c7 | 1435 | { |
a5da89c6 | 1436 | const struct pragma_entry *p = NULL; |
f3d25c65 | 1437 | const cpp_token *token, *pragma_token; |
620e594b | 1438 | location_t pragma_token_virt_loc = 0; |
1c90c6f9 | 1439 | cpp_token ns_token; |
a5da89c6 | 1440 | unsigned int count = 1; |
add7091b | 1441 | |
93c80368 | 1442 | pfile->state.prevent_expansion++; |
58fea6af | 1443 | |
f3d25c65 DS |
1444 | pragma_token = token = cpp_get_token_with_location (pfile, |
1445 | &pragma_token_virt_loc); | |
1c90c6f9 | 1446 | ns_token = *token; |
4ed5bcfb | 1447 | if (token->type == CPP_NAME) |
0172e2bc | 1448 | { |
9a0c6187 | 1449 | p = lookup_pragma_entry (pfile->pragmas, token->val.node.node); |
a5da89c6 | 1450 | if (p && p->is_nspace) |
58fea6af | 1451 | { |
bc4071dd RH |
1452 | bool allow_name_expansion = p->allow_expansion; |
1453 | if (allow_name_expansion) | |
828a7f76 | 1454 | pfile->state.prevent_expansion--; |
38fbfaf6 | 1455 | |
a5da89c6 NB |
1456 | token = cpp_get_token (pfile); |
1457 | if (token->type == CPP_NAME) | |
9a0c6187 | 1458 | p = lookup_pragma_entry (p->u.space, token->val.node.node); |
a5da89c6 NB |
1459 | else |
1460 | p = NULL; | |
bc4071dd RH |
1461 | if (allow_name_expansion) |
1462 | pfile->state.prevent_expansion++; | |
1463 | count = 2; | |
58fea6af | 1464 | } |
58fea6af | 1465 | } |
041c3194 | 1466 | |
3da3d587 | 1467 | if (p) |
e2e1fa50 | 1468 | { |
bc4071dd RH |
1469 | if (p->is_deferred) |
1470 | { | |
f3d25c65 | 1471 | pfile->directive_result.src_loc = pragma_token_virt_loc; |
bc4071dd RH |
1472 | pfile->directive_result.type = CPP_PRAGMA; |
1473 | pfile->directive_result.flags = pragma_token->flags; | |
1474 | pfile->directive_result.val.pragma = p->u.ident; | |
1475 | pfile->state.in_deferred_pragma = true; | |
1476 | pfile->state.pragma_allow_expansion = p->allow_expansion; | |
1477 | if (!p->allow_expansion) | |
1478 | pfile->state.prevent_expansion++; | |
1479 | } | |
1480 | else | |
3da3d587 | 1481 | { |
bc4071dd RH |
1482 | /* Since the handler below doesn't get the line number, that |
1483 | it might need for diagnostics, make sure it has the right | |
3da3d587 ZW |
1484 | numbers in place. */ |
1485 | if (pfile->cb.line_change) | |
1486 | (*pfile->cb.line_change) (pfile, pragma_token, false); | |
bc4071dd | 1487 | if (p->allow_expansion) |
b5b3e36a | 1488 | pfile->state.prevent_expansion--; |
3da3d587 | 1489 | (*p->u.handler) (pfile); |
bc4071dd | 1490 | if (p->allow_expansion) |
b5b3e36a | 1491 | pfile->state.prevent_expansion++; |
3da3d587 | 1492 | } |
21b11495 | 1493 | } |
d82fc108 | 1494 | else if (pfile->cb.def_pragma) |
bdcbe496 | 1495 | { |
1c90c6f9 JJ |
1496 | if (count == 1 || pfile->context->prev == NULL) |
1497 | _cpp_backup_tokens (pfile, count); | |
1498 | else | |
1499 | { | |
1500 | /* Invalid name comes from macro expansion, _cpp_backup_tokens | |
1501 | won't allow backing 2 tokens. */ | |
1502 | /* ??? The token buffer is leaked. Perhaps if def_pragma hook | |
1503 | reads both tokens, we could perhaps free it, but if it doesn't, | |
1504 | we don't know the exact lifespan. */ | |
1505 | cpp_token *toks = XNEWVEC (cpp_token, 2); | |
1506 | toks[0] = ns_token; | |
1507 | toks[0].flags |= NO_EXPAND; | |
1508 | toks[1] = *token; | |
1509 | toks[1].flags |= NO_EXPAND; | |
1510 | _cpp_push_token_context (pfile, NULL, toks, 2); | |
1511 | } | |
6cf87ca4 | 1512 | pfile->cb.def_pragma (pfile, pfile->directive_line); |
bdcbe496 | 1513 | } |
a5da89c6 | 1514 | |
97293897 | 1515 | pfile->state.prevent_expansion--; |
82443371 NS |
1516 | } |
1517 | ||
5d8ebbd8 | 1518 | /* Handle #pragma once. */ |
58fea6af | 1519 | static void |
6cf87ca4 | 1520 | do_pragma_once (cpp_reader *pfile) |
a2a76ce7 | 1521 | { |
705e2d28 | 1522 | if (cpp_in_primary_file (pfile)) |
0527bc4e | 1523 | cpp_error (pfile, CPP_DL_WARNING, "#pragma once in main file"); |
93c80368 | 1524 | |
a5cb563b | 1525 | check_eol (pfile, false); |
49634b3a | 1526 | _cpp_mark_file_once_only (pfile, pfile->buffer->file); |
a2a76ce7 | 1527 | } |
fc009f96 | 1528 | |
17e7cb85 KT |
1529 | /* Handle #pragma push_macro(STRING). */ |
1530 | static void | |
1531 | do_pragma_push_macro (cpp_reader *pfile) | |
1532 | { | |
d6874138 KT |
1533 | cpp_hashnode *node; |
1534 | size_t defnlen; | |
1535 | const uchar *defn = NULL; | |
17e7cb85 KT |
1536 | char *macroname, *dest; |
1537 | const char *limit, *src; | |
1538 | const cpp_token *txt; | |
1539 | struct def_pragma_macro *c; | |
1540 | ||
1541 | txt = get__Pragma_string (pfile); | |
1542 | if (!txt) | |
1543 | { | |
620e594b | 1544 | location_t src_loc = pfile->cur_token[-1].src_loc; |
17e7cb85 KT |
1545 | cpp_error_with_line (pfile, CPP_DL_ERROR, src_loc, 0, |
1546 | "invalid #pragma push_macro directive"); | |
1547 | check_eol (pfile, false); | |
1548 | skip_rest_of_line (pfile); | |
1549 | return; | |
1550 | } | |
1551 | dest = macroname = (char *) alloca (txt->val.str.len + 2); | |
1552 | src = (const char *) (txt->val.str.text + 1 + (txt->val.str.text[0] == 'L')); | |
1553 | limit = (const char *) (txt->val.str.text + txt->val.str.len - 1); | |
1554 | while (src < limit) | |
1555 | { | |
1556 | /* We know there is a character following the backslash. */ | |
1557 | if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
1558 | src++; | |
1559 | *dest++ = *src++; | |
1560 | } | |
1561 | *dest = 0; | |
1562 | check_eol (pfile, false); | |
1563 | skip_rest_of_line (pfile); | |
1564 | c = XNEW (struct def_pragma_macro); | |
d6874138 | 1565 | memset (c, 0, sizeof (struct def_pragma_macro)); |
17e7cb85 KT |
1566 | c->name = XNEWVAR (char, strlen (macroname) + 1); |
1567 | strcpy (c->name, macroname); | |
1568 | c->next = pfile->pushed_macros; | |
d6874138 KT |
1569 | node = _cpp_lex_identifier (pfile, c->name); |
1570 | if (node->type == NT_VOID) | |
1571 | c->is_undef = 1; | |
1572 | else | |
1573 | { | |
1574 | defn = cpp_macro_definition (pfile, node); | |
1575 | defnlen = ustrlen (defn); | |
1576 | c->definition = XNEWVEC (uchar, defnlen + 2); | |
1577 | c->definition[defnlen] = '\n'; | |
1578 | c->definition[defnlen + 1] = 0; | |
1579 | c->line = node->value.macro->line; | |
1580 | c->syshdr = node->value.macro->syshdr; | |
1581 | c->used = node->value.macro->used; | |
1582 | memcpy (c->definition, defn, defnlen); | |
1583 | } | |
1584 | ||
17e7cb85 KT |
1585 | pfile->pushed_macros = c; |
1586 | } | |
1587 | ||
1588 | /* Handle #pragma pop_macro(STRING). */ | |
1589 | static void | |
1590 | do_pragma_pop_macro (cpp_reader *pfile) | |
1591 | { | |
1592 | char *macroname, *dest; | |
1593 | const char *limit, *src; | |
1594 | const cpp_token *txt; | |
1595 | struct def_pragma_macro *l = NULL, *c = pfile->pushed_macros; | |
1596 | txt = get__Pragma_string (pfile); | |
1597 | if (!txt) | |
1598 | { | |
620e594b | 1599 | location_t src_loc = pfile->cur_token[-1].src_loc; |
17e7cb85 KT |
1600 | cpp_error_with_line (pfile, CPP_DL_ERROR, src_loc, 0, |
1601 | "invalid #pragma pop_macro directive"); | |
1602 | check_eol (pfile, false); | |
1603 | skip_rest_of_line (pfile); | |
1604 | return; | |
1605 | } | |
1606 | dest = macroname = (char *) alloca (txt->val.str.len + 2); | |
1607 | src = (const char *) (txt->val.str.text + 1 + (txt->val.str.text[0] == 'L')); | |
1608 | limit = (const char *) (txt->val.str.text + txt->val.str.len - 1); | |
1609 | while (src < limit) | |
1610 | { | |
1611 | /* We know there is a character following the backslash. */ | |
1612 | if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
1613 | src++; | |
1614 | *dest++ = *src++; | |
1615 | } | |
1616 | *dest = 0; | |
1617 | check_eol (pfile, false); | |
1618 | skip_rest_of_line (pfile); | |
1619 | ||
1620 | while (c != NULL) | |
1621 | { | |
1622 | if (!strcmp (c->name, macroname)) | |
1623 | { | |
1624 | if (!l) | |
1625 | pfile->pushed_macros = c->next; | |
1626 | else | |
1627 | l->next = c->next; | |
d6874138 KT |
1628 | cpp_pop_definition (pfile, c); |
1629 | free (c->definition); | |
17e7cb85 KT |
1630 | free (c->name); |
1631 | free (c); | |
1632 | break; | |
1633 | } | |
1634 | l = c; | |
1635 | c = c->next; | |
1636 | } | |
1637 | } | |
1638 | ||
c3bf3e6e NB |
1639 | /* Handle #pragma GCC poison, to poison one or more identifiers so |
1640 | that the lexer produces a hard error for each subsequent usage. */ | |
58fea6af | 1641 | static void |
6cf87ca4 | 1642 | do_pragma_poison (cpp_reader *pfile) |
a2a76ce7 | 1643 | { |
345894b4 | 1644 | const cpp_token *tok; |
f8f769ea | 1645 | cpp_hashnode *hp; |
a2a76ce7 | 1646 | |
93c80368 | 1647 | pfile->state.poisoned_ok = 1; |
a2a76ce7 ZW |
1648 | for (;;) |
1649 | { | |
345894b4 NB |
1650 | tok = _cpp_lex_token (pfile); |
1651 | if (tok->type == CPP_EOF) | |
a2a76ce7 | 1652 | break; |
345894b4 | 1653 | if (tok->type != CPP_NAME) |
fc009f96 | 1654 | { |
0527bc4e JDA |
1655 | cpp_error (pfile, CPP_DL_ERROR, |
1656 | "invalid #pragma GCC poison directive"); | |
93c80368 | 1657 | break; |
fc009f96 GK |
1658 | } |
1659 | ||
9a0c6187 | 1660 | hp = tok->val.node.node; |
93c80368 NB |
1661 | if (hp->flags & NODE_POISONED) |
1662 | continue; | |
1663 | ||
3f6677f4 | 1664 | if (cpp_macro_p (hp)) |
0527bc4e | 1665 | cpp_error (pfile, CPP_DL_WARNING, "poisoning existing macro \"%s\"", |
ebef4e8c | 1666 | NODE_NAME (hp)); |
93c80368 NB |
1667 | _cpp_free_definition (hp); |
1668 | hp->flags |= NODE_POISONED | NODE_DIAGNOSTIC; | |
fc009f96 | 1669 | } |
93c80368 | 1670 | pfile->state.poisoned_ok = 0; |
7f2935c7 | 1671 | } |
2c0b35cb ZW |
1672 | |
1673 | /* Mark the current header as a system header. This will suppress | |
1674 | some categories of warnings (notably those from -pedantic). It is | |
1675 | intended for use in system libraries that cannot be implemented in | |
1676 | conforming C, but cannot be certain that their headers appear in a | |
1677 | system include directory. To prevent abuse, it is rejected in the | |
1678 | primary source file. */ | |
58fea6af | 1679 | static void |
6cf87ca4 | 1680 | do_pragma_system_header (cpp_reader *pfile) |
2c0b35cb | 1681 | { |
705e2d28 | 1682 | if (cpp_in_primary_file (pfile)) |
0527bc4e | 1683 | cpp_error (pfile, CPP_DL_WARNING, |
ebef4e8c | 1684 | "#pragma system_header ignored outside include file"); |
2c0b35cb | 1685 | else |
d82fc108 | 1686 | { |
a5cb563b | 1687 | check_eol (pfile, false); |
bdcbe496 | 1688 | skip_rest_of_line (pfile); |
d82fc108 NB |
1689 | cpp_make_system_header (pfile, 1, 0); |
1690 | } | |
2c0b35cb | 1691 | } |
f3f751ad NS |
1692 | |
1693 | /* Check the modified date of the current include file against a specified | |
1694 | file. Issue a diagnostic, if the specified file is newer. We use this to | |
1695 | determine if a fixed header should be refixed. */ | |
58fea6af | 1696 | static void |
6cf87ca4 | 1697 | do_pragma_dependency (cpp_reader *pfile) |
f3f751ad | 1698 | { |
74eb4b3e NB |
1699 | const char *fname; |
1700 | int angle_brackets, ordering; | |
620e594b | 1701 | location_t location; |
df383483 | 1702 | |
a28fbdba | 1703 | fname = parse_include (pfile, &angle_brackets, NULL, &location); |
74eb4b3e | 1704 | if (!fname) |
58fea6af | 1705 | return; |
041c3194 | 1706 | |
74eb4b3e | 1707 | ordering = _cpp_compare_file_date (pfile, fname, angle_brackets); |
f3f751ad | 1708 | if (ordering < 0) |
0527bc4e | 1709 | cpp_error (pfile, CPP_DL_WARNING, "cannot find source file %s", fname); |
f3f751ad NS |
1710 | else if (ordering > 0) |
1711 | { | |
0527bc4e JDA |
1712 | cpp_error (pfile, CPP_DL_WARNING, |
1713 | "current file is older than %s", fname); | |
4ed5bcfb | 1714 | if (cpp_get_token (pfile)->type != CPP_EOF) |
bdcbe496 NB |
1715 | { |
1716 | _cpp_backup_tokens (pfile, 1); | |
c24300ba | 1717 | do_diagnostic (pfile, CPP_DL_WARNING, CPP_W_NONE, 0); |
bdcbe496 | 1718 | } |
f3f751ad | 1719 | } |
74eb4b3e | 1720 | |
fad205ff | 1721 | free ((void *) fname); |
f3f751ad NS |
1722 | } |
1723 | ||
f591bd8f FW |
1724 | /* Issue a diagnostic with the message taken from the pragma. If |
1725 | ERROR is true, the diagnostic is a warning, otherwise, it is an | |
1726 | error. */ | |
1727 | static void | |
1728 | do_pragma_warning_or_error (cpp_reader *pfile, bool error) | |
1729 | { | |
1730 | const cpp_token *tok = _cpp_lex_token (pfile); | |
1731 | cpp_string str; | |
1732 | if (tok->type != CPP_STRING | |
1733 | || !cpp_interpret_string_notranslate (pfile, &tok->val.str, 1, &str, | |
1734 | CPP_STRING) | |
1735 | || str.len == 0) | |
1736 | { | |
1737 | cpp_error (pfile, CPP_DL_ERROR, "invalid \"#pragma GCC %s\" directive", | |
1738 | error ? "error" : "warning"); | |
1739 | return; | |
1740 | } | |
1741 | cpp_error (pfile, error ? CPP_DL_ERROR : CPP_DL_WARNING, | |
1742 | "%s", str.text); | |
1743 | free ((void *)str.text); | |
1744 | } | |
1745 | ||
1746 | /* Issue a warning diagnostic. */ | |
1747 | static void | |
1748 | do_pragma_warning (cpp_reader *pfile) | |
1749 | { | |
1750 | do_pragma_warning_or_error (pfile, false); | |
1751 | } | |
1752 | ||
1753 | /* Issue an error diagnostic. */ | |
1754 | static void | |
1755 | do_pragma_error (cpp_reader *pfile) | |
1756 | { | |
1757 | do_pragma_warning_or_error (pfile, true); | |
1758 | } | |
1759 | ||
4ed5bcfb NB |
1760 | /* Get a token but skip padding. */ |
1761 | static const cpp_token * | |
6cf87ca4 | 1762 | get_token_no_padding (cpp_reader *pfile) |
a5c3cccd | 1763 | { |
4ed5bcfb NB |
1764 | for (;;) |
1765 | { | |
1766 | const cpp_token *result = cpp_get_token (pfile); | |
1767 | if (result->type != CPP_PADDING) | |
1768 | return result; | |
1769 | } | |
1770 | } | |
a5c3cccd | 1771 | |
4ed5bcfb NB |
1772 | /* Check syntax is "(string-literal)". Returns the string on success, |
1773 | or NULL on failure. */ | |
1774 | static const cpp_token * | |
6cf87ca4 | 1775 | get__Pragma_string (cpp_reader *pfile) |
4ed5bcfb NB |
1776 | { |
1777 | const cpp_token *string; | |
5b9a40df | 1778 | const cpp_token *paren; |
a5c3cccd | 1779 | |
5b9a40df TT |
1780 | paren = get_token_no_padding (pfile); |
1781 | if (paren->type == CPP_EOF) | |
1782 | _cpp_backup_tokens (pfile, 1); | |
1783 | if (paren->type != CPP_OPEN_PAREN) | |
4ed5bcfb NB |
1784 | return NULL; |
1785 | ||
1786 | string = get_token_no_padding (pfile); | |
5b9a40df TT |
1787 | if (string->type == CPP_EOF) |
1788 | _cpp_backup_tokens (pfile, 1); | |
b6baa67d | 1789 | if (string->type != CPP_STRING && string->type != CPP_WSTRING |
2c6e3f55 JJ |
1790 | && string->type != CPP_STRING32 && string->type != CPP_STRING16 |
1791 | && string->type != CPP_UTF8STRING) | |
4ed5bcfb NB |
1792 | return NULL; |
1793 | ||
5b9a40df TT |
1794 | paren = get_token_no_padding (pfile); |
1795 | if (paren->type == CPP_EOF) | |
1796 | _cpp_backup_tokens (pfile, 1); | |
1797 | if (paren->type != CPP_CLOSE_PAREN) | |
4ed5bcfb | 1798 | return NULL; |
a5c3cccd | 1799 | |
4ed5bcfb | 1800 | return string; |
a5c3cccd NB |
1801 | } |
1802 | ||
87062813 NB |
1803 | /* Destringize IN into a temporary buffer, by removing the first \ of |
1804 | \" and \\ sequences, and process the result as a #pragma directive. */ | |
1805 | static void | |
0afff540 | 1806 | destringize_and_run (cpp_reader *pfile, const cpp_string *in, |
620e594b | 1807 | location_t expansion_loc) |
a5c3cccd NB |
1808 | { |
1809 | const unsigned char *src, *limit; | |
87062813 | 1810 | char *dest, *result; |
bc4071dd RH |
1811 | cpp_context *saved_context; |
1812 | cpp_token *saved_cur_token; | |
1813 | tokenrun *saved_cur_run; | |
1814 | cpp_token *toks; | |
1815 | int count; | |
14ccf800 | 1816 | const struct directive *save_directive; |
a5c3cccd | 1817 | |
c3f829c1 | 1818 | dest = result = (char *) alloca (in->len - 1); |
6338b358 NB |
1819 | src = in->text + 1 + (in->text[0] == 'L'); |
1820 | limit = in->text + in->len - 1; | |
1821 | while (src < limit) | |
a5c3cccd NB |
1822 | { |
1823 | /* We know there is a character following the backslash. */ | |
1824 | if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
1825 | src++; | |
1826 | *dest++ = *src++; | |
1827 | } | |
26aea073 | 1828 | *dest = '\n'; |
a5c3cccd | 1829 | |
8128cccf NB |
1830 | /* Ugh; an awful kludge. We are really not set up to be lexing |
1831 | tokens when in the middle of a macro expansion. Use a new | |
1832 | context to force cpp_get_token to lex, and so skip_rest_of_line | |
1833 | doesn't go beyond the end of the text. Also, remember the | |
1834 | current lexing position so we can return to it later. | |
1835 | ||
1836 | Something like line-at-a-time lexing should remove the need for | |
1837 | this. */ | |
bc4071dd RH |
1838 | saved_context = pfile->context; |
1839 | saved_cur_token = pfile->cur_token; | |
1840 | saved_cur_run = pfile->cur_run; | |
79ba5e3b | 1841 | |
3ad64f53 | 1842 | pfile->context = XCNEW (cpp_context); |
79ba5e3b | 1843 | |
bc4071dd RH |
1844 | /* Inline run_directive, since we need to delay the _cpp_pop_buffer |
1845 | until we've read all of the tokens that we want. */ | |
1846 | cpp_push_buffer (pfile, (const uchar *) result, dest - result, | |
1847 | /* from_stage3 */ true); | |
1848 | /* ??? Antique Disgusting Hack. What does this do? */ | |
1849 | if (pfile->buffer->prev) | |
1850 | pfile->buffer->file = pfile->buffer->prev->file; | |
79ba5e3b | 1851 | |
bc4071dd RH |
1852 | start_directive (pfile); |
1853 | _cpp_clean_line (pfile); | |
14ccf800 TT |
1854 | save_directive = pfile->directive; |
1855 | pfile->directive = &dtable[T_PRAGMA]; | |
bc4071dd RH |
1856 | do_pragma (pfile); |
1857 | end_directive (pfile, 1); | |
14ccf800 | 1858 | pfile->directive = save_directive; |
79ba5e3b | 1859 | |
bc4071dd RH |
1860 | /* We always insert at least one token, the directive result. It'll |
1861 | either be a CPP_PADDING or a CPP_PRAGMA. In the later case, we | |
1862 | need to insert *all* of the tokens, including the CPP_PRAGMA_EOL. */ | |
1863 | ||
1864 | /* If we're not handling the pragma internally, read all of the tokens from | |
1865 | the string buffer now, while the string buffer is still installed. */ | |
1866 | /* ??? Note that the token buffer allocated here is leaked. It's not clear | |
1867 | to me what the true lifespan of the tokens are. It would appear that | |
1868 | the lifespan is the entire parse of the main input stream, in which case | |
1869 | this may not be wrong. */ | |
1870 | if (pfile->directive_result.type == CPP_PRAGMA) | |
1871 | { | |
1872 | int maxcount; | |
1873 | ||
1874 | count = 1; | |
1875 | maxcount = 50; | |
1876 | toks = XNEWVEC (cpp_token, maxcount); | |
1877 | toks[0] = pfile->directive_result; | |
79ba5e3b | 1878 | |
bc4071dd RH |
1879 | do |
1880 | { | |
1881 | if (count == maxcount) | |
1882 | { | |
1883 | maxcount = maxcount * 3 / 2; | |
1884 | toks = XRESIZEVEC (cpp_token, toks, maxcount); | |
1885 | } | |
1c90c6f9 | 1886 | toks[count] = *cpp_get_token (pfile); |
0afff540 DM |
1887 | /* _Pragma is a builtin, so we're not within a macro-map, and so |
1888 | the token locations are set to bogus ordinary locations | |
1889 | near to, but after that of the "_Pragma". | |
1890 | Paper over this by setting them equal to the location of the | |
1891 | _Pragma itself (PR preprocessor/69126). */ | |
1892 | toks[count].src_loc = expansion_loc; | |
1c90c6f9 JJ |
1893 | /* Macros have been already expanded by cpp_get_token |
1894 | if the pragma allowed expansion. */ | |
1895 | toks[count++].flags |= NO_EXPAND; | |
bc4071dd RH |
1896 | } |
1897 | while (toks[count-1].type != CPP_PRAGMA_EOL); | |
1898 | } | |
1899 | else | |
1900 | { | |
1901 | count = 1; | |
1902 | toks = XNEW (cpp_token); | |
1903 | toks[0] = pfile->directive_result; | |
1904 | ||
1905 | /* If we handled the entire pragma internally, make sure we get the | |
1906 | line number correct for the next token. */ | |
1907 | if (pfile->cb.line_change) | |
1908 | pfile->cb.line_change (pfile, pfile->cur_token, false); | |
1909 | } | |
1910 | ||
1911 | /* Finish inlining run_directive. */ | |
1912 | pfile->buffer->file = NULL; | |
1913 | _cpp_pop_buffer (pfile); | |
1914 | ||
1915 | /* Reset the old macro state before ... */ | |
1916 | XDELETE (pfile->context); | |
1917 | pfile->context = saved_context; | |
1918 | pfile->cur_token = saved_cur_token; | |
1919 | pfile->cur_run = saved_cur_run; | |
1920 | ||
1921 | /* ... inserting the new tokens we collected. */ | |
1922 | _cpp_push_token_context (pfile, NULL, toks, count); | |
a5c3cccd NB |
1923 | } |
1924 | ||
5b9a40df TT |
1925 | /* Handle the _Pragma operator. Return 0 on error, 1 if ok. */ |
1926 | int | |
620e594b | 1927 | _cpp_do__Pragma (cpp_reader *pfile, location_t expansion_loc) |
a5c3cccd | 1928 | { |
4ed5bcfb | 1929 | const cpp_token *string = get__Pragma_string (pfile); |
21b11495 | 1930 | pfile->directive_result.type = CPP_PADDING; |
a5c3cccd | 1931 | |
79ba5e3b | 1932 | if (string) |
5b9a40df | 1933 | { |
0afff540 | 1934 | destringize_and_run (pfile, &string->val.str, expansion_loc); |
5b9a40df TT |
1935 | return 1; |
1936 | } | |
1937 | cpp_error (pfile, CPP_DL_ERROR, | |
1938 | "_Pragma takes a parenthesized string literal"); | |
1939 | return 0; | |
a5c3cccd | 1940 | } |
21b11495 | 1941 | |
5d8ebbd8 | 1942 | /* Handle #ifdef. */ |
711b8824 | 1943 | static void |
6cf87ca4 | 1944 | do_ifdef (cpp_reader *pfile) |
168d3732 | 1945 | { |
93c80368 | 1946 | int skip = 1; |
041c3194 | 1947 | |
cef0d199 | 1948 | if (! pfile->state.skipping) |
93c80368 | 1949 | { |
93d45d9e | 1950 | cpp_hashnode *node = lex_macro_node (pfile, false); |
041c3194 | 1951 | |
93c80368 | 1952 | if (node) |
a69cbaac | 1953 | { |
f3c33d9d | 1954 | /* Do not treat conditional macros as being defined. This is due to |
2f2aeda9 UW |
1955 | the powerpc port using conditional macros for 'vector', 'bool', |
1956 | and 'pixel' to act as conditional keywords. This messes up tests | |
1957 | like #ifndef bool. */ | |
3f6677f4 | 1958 | skip = !cpp_macro_p (node) || (node->flags & NODE_CONDITIONAL); |
a69cbaac | 1959 | _cpp_mark_macro_used (node); |
3f6677f4 | 1960 | _cpp_maybe_notify_macro_use (pfile, node); |
3de8a540 AC |
1961 | if (pfile->cb.used) |
1962 | pfile->cb.used (pfile, pfile->directive_line, node); | |
a5cb563b | 1963 | check_eol (pfile, false); |
a69cbaac | 1964 | } |
93c80368 | 1965 | } |
168d3732 | 1966 | |
93c80368 NB |
1967 | push_conditional (pfile, skip, T_IFDEF, 0); |
1968 | } | |
168d3732 | 1969 | |
5d8ebbd8 | 1970 | /* Handle #ifndef. */ |
711b8824 | 1971 | static void |
6cf87ca4 | 1972 | do_ifndef (cpp_reader *pfile) |
168d3732 | 1973 | { |
93c80368 | 1974 | int skip = 1; |
93d45d9e | 1975 | cpp_hashnode *node = 0; |
168d3732 | 1976 | |
cef0d199 | 1977 | if (! pfile->state.skipping) |
5af7e2c2 | 1978 | { |
ee1c2a10 | 1979 | node = lex_macro_node (pfile, false); |
b43db0b3 GK |
1980 | |
1981 | if (node) | |
a69cbaac | 1982 | { |
f3c33d9d | 1983 | /* Do not treat conditional macros as being defined. This is due to |
2f2aeda9 UW |
1984 | the powerpc port using conditional macros for 'vector', 'bool', |
1985 | and 'pixel' to act as conditional keywords. This messes up tests | |
1986 | like #ifndef bool. */ | |
3f6677f4 NS |
1987 | skip = (cpp_macro_p (node) |
1988 | && !(node->flags & NODE_CONDITIONAL)); | |
a69cbaac | 1989 | _cpp_mark_macro_used (node); |
3f6677f4 | 1990 | _cpp_maybe_notify_macro_use (pfile, node); |
3de8a540 AC |
1991 | if (pfile->cb.used) |
1992 | pfile->cb.used (pfile, pfile->directive_line, node); | |
a5cb563b | 1993 | check_eol (pfile, false); |
a69cbaac | 1994 | } |
5af7e2c2 | 1995 | } |
041c3194 | 1996 | |
93c80368 | 1997 | push_conditional (pfile, skip, T_IFNDEF, node); |
7f2935c7 PB |
1998 | } |
1999 | ||
6d18adbc NB |
2000 | /* _cpp_parse_expr puts a macro in a "#if !defined ()" expression in |
2001 | pfile->mi_ind_cmacro so we can handle multiple-include | |
6356f892 | 2002 | optimizations. If macro expansion occurs in the expression, we |
6d18adbc NB |
2003 | cannot treat it as a controlling conditional, since the expansion |
2004 | could change in the future. That is handled by cpp_get_token. */ | |
711b8824 | 2005 | static void |
6cf87ca4 | 2006 | do_if (cpp_reader *pfile) |
7f2935c7 | 2007 | { |
93c80368 | 2008 | int skip = 1; |
7f2935c7 | 2009 | |
cef0d199 | 2010 | if (! pfile->state.skipping) |
d750887f | 2011 | skip = _cpp_parse_expr (pfile, true) == false; |
93c80368 | 2012 | |
6d18adbc | 2013 | push_conditional (pfile, skip, T_IF, pfile->mi_ind_cmacro); |
7f2935c7 PB |
2014 | } |
2015 | ||
b528a07e | 2016 | /* Flip skipping state if appropriate and continue without changing |
ea4a453b ZW |
2017 | if_stack; this is so that the error message for missing #endif's |
2018 | etc. will point to the original #if. */ | |
711b8824 | 2019 | static void |
6cf87ca4 | 2020 | do_else (cpp_reader *pfile) |
ed705a82 | 2021 | { |
b528a07e NB |
2022 | cpp_buffer *buffer = pfile->buffer; |
2023 | struct if_stack *ifs = buffer->if_stack; | |
ff2b53ef | 2024 | |
ea4a453b | 2025 | if (ifs == NULL) |
0527bc4e | 2026 | cpp_error (pfile, CPP_DL_ERROR, "#else without #if"); |
93c80368 | 2027 | else |
ff2b53ef | 2028 | { |
93c80368 NB |
2029 | if (ifs->type == T_ELSE) |
2030 | { | |
0527bc4e JDA |
2031 | cpp_error (pfile, CPP_DL_ERROR, "#else after #else"); |
2032 | cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
93c80368 NB |
2033 | "the conditional began here"); |
2034 | } | |
b528a07e NB |
2035 | ifs->type = T_ELSE; |
2036 | ||
cef0d199 NB |
2037 | /* Skip any future (erroneous) #elses or #elifs. */ |
2038 | pfile->state.skipping = ifs->skip_elses; | |
2039 | ifs->skip_elses = true; | |
7f2935c7 | 2040 | |
93c80368 NB |
2041 | /* Invalidate any controlling macro. */ |
2042 | ifs->mi_cmacro = 0; | |
93c80368 | 2043 | |
cef0d199 | 2044 | /* Only check EOL if was not originally skipping. */ |
909de5da | 2045 | if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) |
81b5d104 | 2046 | check_eol_endif_labels (pfile); |
cef0d199 | 2047 | } |
7f2935c7 PB |
2048 | } |
2049 | ||
5d8ebbd8 | 2050 | /* Handle a #elif directive by not changing if_stack either. See the |
93c80368 | 2051 | comment above do_else. */ |
711b8824 | 2052 | static void |
6cf87ca4 | 2053 | do_elif (cpp_reader *pfile) |
7f2935c7 | 2054 | { |
b528a07e NB |
2055 | cpp_buffer *buffer = pfile->buffer; |
2056 | struct if_stack *ifs = buffer->if_stack; | |
7f2935c7 | 2057 | |
ea4a453b | 2058 | if (ifs == NULL) |
0527bc4e | 2059 | cpp_error (pfile, CPP_DL_ERROR, "#elif without #if"); |
b528a07e | 2060 | else |
40ea76de | 2061 | { |
b528a07e NB |
2062 | if (ifs->type == T_ELSE) |
2063 | { | |
0527bc4e JDA |
2064 | cpp_error (pfile, CPP_DL_ERROR, "#elif after #else"); |
2065 | cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
b528a07e NB |
2066 | "the conditional began here"); |
2067 | } | |
2068 | ifs->type = T_ELIF; | |
93c80368 | 2069 | |
10ef8f28 MP |
2070 | /* See DR#412: "Only the first group whose control condition |
2071 | evaluates to true (nonzero) is processed; any following groups | |
2072 | are skipped and their controlling directives are processed as | |
2073 | if they were in a group that is skipped." */ | |
2074 | if (ifs->skip_elses) | |
2075 | pfile->state.skipping = 1; | |
2076 | else | |
b528a07e | 2077 | { |
10ef8f28 MP |
2078 | pfile->state.skipping = ! _cpp_parse_expr (pfile, false); |
2079 | ifs->skip_elses = ! pfile->state.skipping; | |
b528a07e | 2080 | } |
cef0d199 NB |
2081 | |
2082 | /* Invalidate any controlling macro. */ | |
2083 | ifs->mi_cmacro = 0; | |
40ea76de | 2084 | } |
7f2935c7 PB |
2085 | } |
2086 | ||
cef0d199 | 2087 | /* #endif pops the if stack and resets pfile->state.skipping. */ |
711b8824 | 2088 | static void |
6cf87ca4 | 2089 | do_endif (cpp_reader *pfile) |
7f2935c7 | 2090 | { |
b528a07e NB |
2091 | cpp_buffer *buffer = pfile->buffer; |
2092 | struct if_stack *ifs = buffer->if_stack; | |
ea4a453b | 2093 | |
ea4a453b | 2094 | if (ifs == NULL) |
0527bc4e | 2095 | cpp_error (pfile, CPP_DL_ERROR, "#endif without #if"); |
7f2935c7 PB |
2096 | else |
2097 | { | |
cef0d199 | 2098 | /* Only check EOL if was not originally skipping. */ |
909de5da | 2099 | if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) |
81b5d104 | 2100 | check_eol_endif_labels (pfile); |
cef0d199 | 2101 | |
93c80368 NB |
2102 | /* If potential control macro, we go back outside again. */ |
2103 | if (ifs->next == 0 && ifs->mi_cmacro) | |
2104 | { | |
6d18adbc | 2105 | pfile->mi_valid = true; |
93c80368 NB |
2106 | pfile->mi_cmacro = ifs->mi_cmacro; |
2107 | } | |
2108 | ||
b528a07e | 2109 | buffer->if_stack = ifs->next; |
cef0d199 | 2110 | pfile->state.skipping = ifs->was_skipping; |
2a967f3d | 2111 | obstack_free (&pfile->buffer_ob, ifs); |
7f2935c7 | 2112 | } |
93c80368 | 2113 | } |
041c3194 | 2114 | |
5d8ebbd8 NB |
2115 | /* Push an if_stack entry for a preprocessor conditional, and set |
2116 | pfile->state.skipping to SKIP. If TYPE indicates the conditional | |
2117 | is #if or #ifndef, CMACRO is a potentially controlling macro, and | |
2118 | we need to check here that we are at the top of the file. */ | |
ea4a453b | 2119 | static void |
6cf87ca4 ZW |
2120 | push_conditional (cpp_reader *pfile, int skip, int type, |
2121 | const cpp_hashnode *cmacro) | |
ea4a453b ZW |
2122 | { |
2123 | struct if_stack *ifs; | |
b528a07e | 2124 | cpp_buffer *buffer = pfile->buffer; |
ea4a453b | 2125 | |
72bb2c39 | 2126 | ifs = XOBNEW (&pfile->buffer_ob, struct if_stack); |
50410426 | 2127 | ifs->line = pfile->directive_line; |
b528a07e | 2128 | ifs->next = buffer->if_stack; |
cef0d199 NB |
2129 | ifs->skip_elses = pfile->state.skipping || !skip; |
2130 | ifs->was_skipping = pfile->state.skipping; | |
ea4a453b | 2131 | ifs->type = type; |
6d18adbc NB |
2132 | /* This condition is effectively a test for top-of-file. */ |
2133 | if (pfile->mi_valid && pfile->mi_cmacro == 0) | |
93c80368 NB |
2134 | ifs->mi_cmacro = cmacro; |
2135 | else | |
2136 | ifs->mi_cmacro = 0; | |
ea4a453b | 2137 | |
cef0d199 | 2138 | pfile->state.skipping = skip; |
b528a07e | 2139 | buffer->if_stack = ifs; |
782331f4 | 2140 | } |
7061aa5a | 2141 | |
5d8ebbd8 NB |
2142 | /* Read the tokens of the answer into the macro pool, in a directive |
2143 | of type TYPE. Only commit the memory if we intend it as permanent | |
2144 | storage, i.e. the #assert case. Returns 0 on success, and sets | |
a28fbdba MLI |
2145 | ANSWERP to point to the answer. PRED_LOC is the location of the |
2146 | predicate. */ | |
3fb558b1 | 2147 | static bool |
620e594b | 2148 | parse_answer (cpp_reader *pfile, int type, location_t pred_loc, |
3fb558b1 | 2149 | cpp_macro **answer_ptr) |
7f2935c7 | 2150 | { |
93c80368 NB |
2151 | /* In a conditional, it is legal to not have an open paren. We |
2152 | should save the following token in this case. */ | |
3fb558b1 | 2153 | const cpp_token *paren = cpp_get_token (pfile); |
93c80368 NB |
2154 | |
2155 | /* If not a paren, see if we're OK. */ | |
4ed5bcfb | 2156 | if (paren->type != CPP_OPEN_PAREN) |
041c3194 | 2157 | { |
93c80368 NB |
2158 | /* In a conditional no answer is a test for any answer. It |
2159 | could be followed by any token. */ | |
2160 | if (type == T_IF) | |
bdcbe496 NB |
2161 | { |
2162 | _cpp_backup_tokens (pfile, 1); | |
3fb558b1 | 2163 | return true; |
bdcbe496 | 2164 | } |
93c80368 NB |
2165 | |
2166 | /* #unassert with no answer is valid - it removes all answers. */ | |
4ed5bcfb | 2167 | if (type == T_UNASSERT && paren->type == CPP_EOF) |
3fb558b1 | 2168 | return true; |
15dad1d9 | 2169 | |
a28fbdba MLI |
2170 | cpp_error_with_line (pfile, CPP_DL_ERROR, pred_loc, 0, |
2171 | "missing '(' after predicate"); | |
3fb558b1 | 2172 | return false; |
041c3194 | 2173 | } |
7061aa5a | 2174 | |
3fb558b1 NS |
2175 | cpp_macro *answer = _cpp_new_macro (pfile, cmk_assert, |
2176 | _cpp_reserve_room (pfile, 0, | |
2177 | sizeof (cpp_macro))); | |
2178 | answer->parm.next = NULL; | |
2179 | unsigned count = 0; | |
2180 | for (;;) | |
041c3194 | 2181 | { |
8c3b2693 | 2182 | const cpp_token *token = cpp_get_token (pfile); |
93c80368 | 2183 | |
041c3194 ZW |
2184 | if (token->type == CPP_CLOSE_PAREN) |
2185 | break; | |
a7abcbbf | 2186 | |
93c80368 | 2187 | if (token->type == CPP_EOF) |
041c3194 | 2188 | { |
0527bc4e | 2189 | cpp_error (pfile, CPP_DL_ERROR, "missing ')' to complete answer"); |
3fb558b1 | 2190 | return false; |
041c3194 | 2191 | } |
8c3b2693 | 2192 | |
3fb558b1 NS |
2193 | answer = (cpp_macro *)_cpp_reserve_room |
2194 | (pfile, sizeof (cpp_macro) + count * sizeof (cpp_token), | |
2195 | sizeof (cpp_token)); | |
2196 | answer->exp.tokens[count++] = *token; | |
041c3194 | 2197 | } |
15dad1d9 | 2198 | |
3fb558b1 | 2199 | if (!count) |
7061aa5a | 2200 | { |
0527bc4e | 2201 | cpp_error (pfile, CPP_DL_ERROR, "predicate's answer is empty"); |
3fb558b1 | 2202 | return false; |
7f2935c7 | 2203 | } |
041c3194 | 2204 | |
3fb558b1 NS |
2205 | /* Drop whitespace at start, for answer equivalence purposes. */ |
2206 | answer->exp.tokens[0].flags &= ~PREV_WHITE; | |
041c3194 | 2207 | |
3fb558b1 NS |
2208 | answer->count = count; |
2209 | *answer_ptr = answer; | |
2210 | ||
2211 | return true; | |
93c80368 | 2212 | } |
041c3194 | 2213 | |
5d8ebbd8 | 2214 | /* Parses an assertion directive of type TYPE, returning a pointer to |
a570d97f NS |
2215 | the hash node of the predicate, or 0 on error. The node is |
2216 | guaranteed to be disjoint from the macro namespace, so can only | |
2217 | have type 'NT_VOID'. If an answer was supplied, it is placed in | |
2218 | *ANSWER_PTR, which is otherwise set to 0. */ | |
93c80368 | 2219 | static cpp_hashnode * |
3fb558b1 | 2220 | parse_assertion (cpp_reader *pfile, int type, cpp_macro **answer_ptr) |
93c80368 NB |
2221 | { |
2222 | cpp_hashnode *result = 0; | |
93c80368 NB |
2223 | |
2224 | /* We don't expand predicates or answers. */ | |
2225 | pfile->state.prevent_expansion++; | |
2226 | ||
3fb558b1 NS |
2227 | *answer_ptr = NULL; |
2228 | ||
2229 | const cpp_token *predicate = cpp_get_token (pfile); | |
4ed5bcfb | 2230 | if (predicate->type == CPP_EOF) |
0527bc4e | 2231 | cpp_error (pfile, CPP_DL_ERROR, "assertion without predicate"); |
4ed5bcfb | 2232 | else if (predicate->type != CPP_NAME) |
a28fbdba MLI |
2233 | cpp_error_with_line (pfile, CPP_DL_ERROR, predicate->src_loc, 0, |
2234 | "predicate must be an identifier"); | |
3fb558b1 | 2235 | else if (parse_answer (pfile, type, predicate->src_loc, answer_ptr)) |
93c80368 | 2236 | { |
9a0c6187 | 2237 | unsigned int len = NODE_LEN (predicate->val.node.node); |
c3f829c1 | 2238 | unsigned char *sym = (unsigned char *) alloca (len + 1); |
041c3194 | 2239 | |
93c80368 NB |
2240 | /* Prefix '#' to get it out of macro namespace. */ |
2241 | sym[0] = '#'; | |
9a0c6187 | 2242 | memcpy (sym + 1, NODE_NAME (predicate->val.node.node), len); |
93c80368 NB |
2243 | result = cpp_lookup (pfile, sym, len + 1); |
2244 | } | |
7061aa5a | 2245 | |
93c80368 | 2246 | pfile->state.prevent_expansion--; |
3fb558b1 | 2247 | |
93c80368 | 2248 | return result; |
7f2935c7 | 2249 | } |
7061aa5a | 2250 | |
5d8ebbd8 | 2251 | /* Returns a pointer to the pointer to CANDIDATE in the answer chain, |
041c3194 | 2252 | or a pointer to NULL if the answer is not in the chain. */ |
3fb558b1 NS |
2253 | static cpp_macro ** |
2254 | find_answer (cpp_hashnode *node, const cpp_macro *candidate) | |
7f2935c7 | 2255 | { |
93c80368 | 2256 | unsigned int i; |
3fb558b1 | 2257 | cpp_macro **result = NULL; |
7f2935c7 | 2258 | |
3fb558b1 | 2259 | for (result = &node->value.answers; *result; result = &(*result)->parm.next) |
93c80368 | 2260 | { |
3fb558b1 | 2261 | cpp_macro *answer = *result; |
93c80368 NB |
2262 | |
2263 | if (answer->count == candidate->count) | |
2264 | { | |
2265 | for (i = 0; i < answer->count; i++) | |
3fb558b1 NS |
2266 | if (!_cpp_equiv_tokens (&answer->exp.tokens[i], |
2267 | &candidate->exp.tokens[i])) | |
93c80368 NB |
2268 | break; |
2269 | ||
2270 | if (i == answer->count) | |
2271 | break; | |
2272 | } | |
2273 | } | |
ff2b53ef | 2274 | |
041c3194 ZW |
2275 | return result; |
2276 | } | |
15dad1d9 | 2277 | |
93c80368 | 2278 | /* Test an assertion within a preprocessor conditional. Returns |
da7d8304 | 2279 | nonzero on failure, zero on success. On success, the result of |
2402645b | 2280 | the test is written into VALUE, otherwise the value 0. */ |
93c80368 | 2281 | int |
6cf87ca4 | 2282 | _cpp_test_assertion (cpp_reader *pfile, unsigned int *value) |
93c80368 | 2283 | { |
3fb558b1 NS |
2284 | cpp_macro *answer; |
2285 | cpp_hashnode *node = parse_assertion (pfile, T_IF, &answer); | |
2402645b HPN |
2286 | |
2287 | /* For recovery, an erroneous assertion expression is handled as a | |
2288 | failing assertion. */ | |
2289 | *value = 0; | |
2290 | ||
93c80368 | 2291 | if (node) |
3fb558b1 | 2292 | { |
a570d97f | 2293 | if (node->value.answers) |
3fb558b1 NS |
2294 | *value = !answer || *find_answer (node, answer); |
2295 | } | |
91318908 NB |
2296 | else if (pfile->cur_token[-1].type == CPP_EOF) |
2297 | _cpp_backup_tokens (pfile, 1); | |
93c80368 NB |
2298 | |
2299 | /* We don't commit the memory for the answer - it's temporary only. */ | |
2300 | return node == 0; | |
2301 | } | |
2302 | ||
5d8ebbd8 | 2303 | /* Handle #assert. */ |
711b8824 | 2304 | static void |
6cf87ca4 | 2305 | do_assert (cpp_reader *pfile) |
041c3194 | 2306 | { |
3fb558b1 NS |
2307 | cpp_macro *answer; |
2308 | cpp_hashnode *node = parse_assertion (pfile, T_ASSERT, &answer); | |
df383483 | 2309 | |
041c3194 | 2310 | if (node) |
ff2b53ef | 2311 | { |
93c80368 NB |
2312 | /* Place the new answer in the answer list. First check there |
2313 | is not a duplicate. */ | |
a570d97f | 2314 | if (*find_answer (node, answer)) |
041c3194 | 2315 | { |
3fb558b1 NS |
2316 | cpp_error (pfile, CPP_DL_WARNING, "\"%s\" re-asserted", |
2317 | NODE_NAME (node) + 1); | |
2318 | return; | |
041c3194 | 2319 | } |
8c3b2693 | 2320 | |
3fb558b1 NS |
2321 | /* Commit or allocate storage for the answer. */ |
2322 | answer = (cpp_macro *)_cpp_commit_buff | |
2323 | (pfile, sizeof (cpp_macro) - sizeof (cpp_token) | |
2324 | + sizeof (cpp_token) * answer->count); | |
2325 | ||
a570d97f NS |
2326 | /* Chain into the list. */ |
2327 | answer->parm.next = node->value.answers; | |
3fb558b1 NS |
2328 | node->value.answers = answer; |
2329 | ||
a5cb563b | 2330 | check_eol (pfile, false); |
ff2b53ef | 2331 | } |
041c3194 | 2332 | } |
15dad1d9 | 2333 | |
5d8ebbd8 | 2334 | /* Handle #unassert. */ |
711b8824 | 2335 | static void |
6cf87ca4 | 2336 | do_unassert (cpp_reader *pfile) |
041c3194 | 2337 | { |
3fb558b1 NS |
2338 | cpp_macro *answer; |
2339 | cpp_hashnode *node = parse_assertion (pfile, T_UNASSERT, &answer); | |
df383483 | 2340 | |
93c80368 | 2341 | /* It isn't an error to #unassert something that isn't asserted. */ |
a570d97f | 2342 | if (node) |
7061aa5a | 2343 | { |
93c80368 | 2344 | if (answer) |
15dad1d9 | 2345 | { |
3fb558b1 | 2346 | cpp_macro **p = find_answer (node, answer); |
a7abcbbf | 2347 | |
3fb558b1 NS |
2348 | /* Remove the assert from the list. */ |
2349 | if (cpp_macro *temp = *p) | |
a570d97f | 2350 | *p = temp->parm.next; |
8c3b2693 | 2351 | |
a5cb563b | 2352 | check_eol (pfile, false); |
93c80368 NB |
2353 | } |
2354 | else | |
2355 | _cpp_free_definition (node); | |
041c3194 | 2356 | } |
93c80368 NB |
2357 | |
2358 | /* We don't commit the memory for the answer - it's temporary only. */ | |
7f2935c7 | 2359 | } |
7f2935c7 | 2360 | |
45b966db ZW |
2361 | /* These are for -D, -U, -A. */ |
2362 | ||
2363 | /* Process the string STR as if it appeared as the body of a #define. | |
2364 | If STR is just an identifier, define it with value 1. | |
2365 | If STR has anything after the identifier, then it should | |
ec5c56db | 2366 | be identifier=definition. */ |
0b22d65c | 2367 | void |
6cf87ca4 | 2368 | cpp_define (cpp_reader *pfile, const char *str) |
0b22d65c | 2369 | { |
86373e7e JM |
2370 | char *buf; |
2371 | const char *p; | |
45b966db ZW |
2372 | size_t count; |
2373 | ||
df383483 | 2374 | /* Copy the entire option so we can modify it. |
45b966db | 2375 | Change the first "=" in the string to a space. If there is none, |
86368122 NB |
2376 | tack " 1" on the end. */ |
2377 | ||
86368122 | 2378 | count = strlen (str); |
c3f829c1 | 2379 | buf = (char *) alloca (count + 3); |
86368122 NB |
2380 | memcpy (buf, str, count); |
2381 | ||
2382 | p = strchr (str, '='); | |
45b966db | 2383 | if (p) |
86368122 | 2384 | buf[p - str] = ' '; |
45b966db ZW |
2385 | else |
2386 | { | |
86368122 NB |
2387 | buf[count++] = ' '; |
2388 | buf[count++] = '1'; | |
0b22d65c | 2389 | } |
26aea073 | 2390 | buf[count] = '\n'; |
cf4ed945 | 2391 | |
29401c30 | 2392 | run_directive (pfile, T_DEFINE, buf, count); |
2c8f0515 ZW |
2393 | } |
2394 | ||
28f68625 DF |
2395 | |
2396 | /* Use to build macros to be run through cpp_define() as | |
2397 | described above. | |
2398 | Example: cpp_define_formatted (pfile, "MACRO=%d", value); */ | |
2399 | ||
2400 | void | |
2401 | cpp_define_formatted (cpp_reader *pfile, const char *fmt, ...) | |
2402 | { | |
01ca36af | 2403 | char *ptr; |
28f68625 DF |
2404 | |
2405 | va_list ap; | |
2406 | va_start (ap, fmt); | |
01ca36af | 2407 | ptr = xvasprintf (fmt, ap); |
28f68625 DF |
2408 | va_end (ap); |
2409 | ||
2410 | cpp_define (pfile, ptr); | |
2411 | free (ptr); | |
2412 | } | |
2413 | ||
2414 | ||
ad2a084d | 2415 | /* Slight variant of the above for use by initialize_builtins. */ |
2c8f0515 | 2416 | void |
6cf87ca4 | 2417 | _cpp_define_builtin (cpp_reader *pfile, const char *str) |
2c8f0515 | 2418 | { |
26aea073 | 2419 | size_t len = strlen (str); |
c3f829c1 | 2420 | char *buf = (char *) alloca (len + 1); |
26aea073 NB |
2421 | memcpy (buf, str, len); |
2422 | buf[len] = '\n'; | |
2423 | run_directive (pfile, T_DEFINE, buf, len); | |
45b966db | 2424 | } |
0f41302f | 2425 | |
45b966db ZW |
2426 | /* Process MACRO as if it appeared as the body of an #undef. */ |
2427 | void | |
6cf87ca4 | 2428 | cpp_undef (cpp_reader *pfile, const char *macro) |
7f2935c7 | 2429 | { |
26aea073 | 2430 | size_t len = strlen (macro); |
c3f829c1 | 2431 | char *buf = (char *) alloca (len + 1); |
26aea073 NB |
2432 | memcpy (buf, macro, len); |
2433 | buf[len] = '\n'; | |
2434 | run_directive (pfile, T_UNDEF, buf, len); | |
7f2935c7 PB |
2435 | } |
2436 | ||
d6874138 KT |
2437 | /* Replace a previous definition DEF of the macro STR. If DEF is NULL, |
2438 | or first element is zero, then the macro should be undefined. */ | |
2439 | static void | |
2440 | cpp_pop_definition (cpp_reader *pfile, struct def_pragma_macro *c) | |
121de39f | 2441 | { |
d6874138 | 2442 | cpp_hashnode *node = _cpp_lex_identifier (pfile, c->name); |
121de39f RH |
2443 | if (node == NULL) |
2444 | return; | |
2445 | ||
93d45d9e JM |
2446 | if (pfile->cb.before_define) |
2447 | pfile->cb.before_define (pfile); | |
2448 | ||
3f6677f4 | 2449 | if (cpp_macro_p (node)) |
121de39f RH |
2450 | { |
2451 | if (pfile->cb.undef) | |
2452 | pfile->cb.undef (pfile, pfile->directive_line, node); | |
2453 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
2454 | _cpp_warn_if_unused_macro (pfile, node, NULL); | |
3f6677f4 | 2455 | _cpp_free_definition (node); |
121de39f | 2456 | } |
121de39f | 2457 | |
d6874138 KT |
2458 | if (c->is_undef) |
2459 | return; | |
3f6677f4 | 2460 | |
d6874138 KT |
2461 | { |
2462 | size_t namelen; | |
2463 | const uchar *dn; | |
2464 | cpp_hashnode *h = NULL; | |
2465 | cpp_buffer *nbuf; | |
2466 | ||
2467 | namelen = ustrcspn (c->definition, "( \n"); | |
2468 | h = cpp_lookup (pfile, c->definition, namelen); | |
2469 | dn = c->definition + namelen; | |
2470 | ||
d6874138 KT |
2471 | nbuf = cpp_push_buffer (pfile, dn, ustrchr (dn, '\n') - dn, true); |
2472 | if (nbuf != NULL) | |
2473 | { | |
2474 | _cpp_clean_line (pfile); | |
2475 | nbuf->sysp = 1; | |
2476 | if (!_cpp_create_definition (pfile, h)) | |
2477 | abort (); | |
2478 | _cpp_pop_buffer (pfile); | |
2479 | } | |
2480 | else | |
2481 | abort (); | |
2482 | h->value.macro->line = c->line; | |
2483 | h->value.macro->syshdr = c->syshdr; | |
2484 | h->value.macro->used = c->used; | |
2485 | } | |
121de39f RH |
2486 | } |
2487 | ||
ec5c56db | 2488 | /* Process the string STR as if it appeared as the body of a #assert. */ |
45b966db | 2489 | void |
6cf87ca4 | 2490 | cpp_assert (cpp_reader *pfile, const char *str) |
45b966db | 2491 | { |
86368122 | 2492 | handle_assertion (pfile, str, T_ASSERT); |
45b966db | 2493 | } |
7f2935c7 | 2494 | |
ec5c56db | 2495 | /* Process STR as if it appeared as the body of an #unassert. */ |
45b966db | 2496 | void |
6cf87ca4 | 2497 | cpp_unassert (cpp_reader *pfile, const char *str) |
7f2935c7 | 2498 | { |
86368122 | 2499 | handle_assertion (pfile, str, T_UNASSERT); |
df383483 | 2500 | } |
3fdc651f | 2501 | |
86368122 NB |
2502 | /* Common code for cpp_assert (-A) and cpp_unassert (-A-). */ |
2503 | static void | |
6cf87ca4 | 2504 | handle_assertion (cpp_reader *pfile, const char *str, int type) |
86368122 NB |
2505 | { |
2506 | size_t count = strlen (str); | |
2507 | const char *p = strchr (str, '='); | |
2508 | ||
26aea073 NB |
2509 | /* Copy the entire option so we can modify it. Change the first |
2510 | "=" in the string to a '(', and tack a ')' on the end. */ | |
c3f829c1 | 2511 | char *buf = (char *) alloca (count + 2); |
26aea073 NB |
2512 | |
2513 | memcpy (buf, str, count); | |
86368122 NB |
2514 | if (p) |
2515 | { | |
86368122 NB |
2516 | buf[p - str] = '('; |
2517 | buf[count++] = ')'; | |
86368122 | 2518 | } |
26aea073 NB |
2519 | buf[count] = '\n'; |
2520 | str = buf; | |
86368122 | 2521 | |
29401c30 | 2522 | run_directive (pfile, type, str, count); |
86368122 NB |
2523 | } |
2524 | ||
7e96d768 NB |
2525 | /* The options structure. */ |
2526 | cpp_options * | |
6cf87ca4 | 2527 | cpp_get_options (cpp_reader *pfile) |
7e96d768 NB |
2528 | { |
2529 | return &pfile->opts; | |
2530 | } | |
2531 | ||
2532 | /* The callbacks structure. */ | |
2533 | cpp_callbacks * | |
6cf87ca4 | 2534 | cpp_get_callbacks (cpp_reader *pfile) |
7e96d768 NB |
2535 | { |
2536 | return &pfile->cb; | |
2537 | } | |
2538 | ||
2539 | /* Copy the given callbacks structure to our own. */ | |
2540 | void | |
6cf87ca4 | 2541 | cpp_set_callbacks (cpp_reader *pfile, cpp_callbacks *cb) |
7e96d768 NB |
2542 | { |
2543 | pfile->cb = *cb; | |
2544 | } | |
2545 | ||
c6e83800 | 2546 | /* The dependencies structure. (Creates one if it hasn't already been.) */ |
99b1c316 | 2547 | class mkdeps * |
c6e83800 ZW |
2548 | cpp_get_deps (cpp_reader *pfile) |
2549 | { | |
2550 | if (!pfile->deps) | |
2551 | pfile->deps = deps_init (); | |
2552 | return pfile->deps; | |
2553 | } | |
2554 | ||
eb1f4d9d NB |
2555 | /* Push a new buffer on the buffer stack. Returns the new buffer; it |
2556 | doesn't fail. It does not generate a file change call back; that | |
2557 | is the responsibility of the caller. */ | |
c71f835b | 2558 | cpp_buffer * |
6cf87ca4 | 2559 | cpp_push_buffer (cpp_reader *pfile, const uchar *buffer, size_t len, |
40de9f76 | 2560 | int from_stage3) |
c71f835b | 2561 | { |
c3f829c1 | 2562 | cpp_buffer *new_buffer = XOBNEW (&pfile->buffer_ob, cpp_buffer); |
93c80368 | 2563 | |
fde84349 | 2564 | /* Clears, amongst other things, if_stack and mi_cmacro. */ |
c3f829c1 | 2565 | memset (new_buffer, 0, sizeof (cpp_buffer)); |
fde84349 | 2566 | |
c3f829c1 GDR |
2567 | new_buffer->next_line = new_buffer->buf = buffer; |
2568 | new_buffer->rlimit = buffer + len; | |
2569 | new_buffer->from_stage3 = from_stage3; | |
2570 | new_buffer->prev = pfile->buffer; | |
2571 | new_buffer->need_line = true; | |
0bda4760 | 2572 | |
c3f829c1 | 2573 | pfile->buffer = new_buffer; |
cf551fba | 2574 | |
c3f829c1 | 2575 | return new_buffer; |
c71f835b ZW |
2576 | } |
2577 | ||
af0d16cd NB |
2578 | /* Pops a single buffer, with a file change call-back if appropriate. |
2579 | Then pushes the next -include file, if any remain. */ | |
ef6e958a | 2580 | void |
6cf87ca4 | 2581 | _cpp_pop_buffer (cpp_reader *pfile) |
c71f835b | 2582 | { |
fde84349 | 2583 | cpp_buffer *buffer = pfile->buffer; |
8f9b4009 | 2584 | struct _cpp_file *inc = buffer->file; |
ad2a084d | 2585 | struct if_stack *ifs; |
28937f11 | 2586 | const unsigned char *to_free; |
c71f835b | 2587 | |
fde84349 NB |
2588 | /* Walk back up the conditional stack till we reach its level at |
2589 | entry to this file, issuing error messages. */ | |
2590 | for (ifs = buffer->if_stack; ifs; ifs = ifs->next) | |
0527bc4e | 2591 | cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, |
fde84349 | 2592 | "unterminated #%s", dtable[ifs->type].name); |
eb1f4d9d | 2593 | |
97293897 | 2594 | /* In case of a missing #endif. */ |
67821e3a | 2595 | pfile->state.skipping = 0; |
29401c30 | 2596 | |
af0d16cd | 2597 | /* _cpp_do_file_change expects pfile->buffer to be the new one. */ |
29401c30 NB |
2598 | pfile->buffer = buffer->prev; |
2599 | ||
28937f11 | 2600 | to_free = buffer->to_free; |
26aea073 NB |
2601 | free (buffer->notes); |
2602 | ||
af0d16cd NB |
2603 | /* Free the buffer object now; we may want to push a new buffer |
2604 | in _cpp_push_next_include_file. */ | |
2605 | obstack_free (&pfile->buffer_ob, buffer); | |
29401c30 | 2606 | |
af0d16cd NB |
2607 | if (inc) |
2608 | { | |
28937f11 | 2609 | _cpp_pop_file_buffer (pfile, inc, to_free); |
af0d16cd | 2610 | |
40de9f76 | 2611 | _cpp_do_file_change (pfile, LC_LEAVE, 0, 0, 0); |
af0d16cd | 2612 | } |
705b0c05 NS |
2613 | else if (to_free) |
2614 | free ((void *)to_free); | |
c71f835b ZW |
2615 | } |
2616 | ||
05713b80 | 2617 | /* Enter all recognized directives in the hash table. */ |
c71f835b | 2618 | void |
6cf87ca4 | 2619 | _cpp_init_directives (cpp_reader *pfile) |
c71f835b | 2620 | { |
766ee681 | 2621 | unsigned int i; |
93c80368 | 2622 | cpp_hashnode *node; |
bfb9dc7f | 2623 | |
37b8524c | 2624 | for (i = 0; i < (unsigned int) N_DIRECTIVES; i++) |
93c80368 | 2625 | { |
766ee681 | 2626 | node = cpp_lookup (pfile, dtable[i].name, dtable[i].length); |
4977bab6 ZW |
2627 | node->is_directive = 1; |
2628 | node->directive_index = i; | |
93c80368 | 2629 | } |
c71f835b | 2630 | } |
a15f7cb8 ESR |
2631 | |
2632 | /* Extract header file from a bracket include. Parsing starts after '<'. | |
2633 | The string is malloced and must be freed by the caller. */ | |
2634 | char * | |
2635 | _cpp_bracket_include(cpp_reader *pfile) | |
2636 | { | |
2637 | return glue_header_name (pfile); | |
2638 | } | |
2639 |