]>
Commit | Line | Data |
---|---|---|
a949941c | 1 | /* CPP Library. (Directive handling.) |
7adcbafe | 2 | Copyright (C) 1986-2022 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 | |
71d38ec8 JM |
59 | 1989 C standard. STDC2X directives come from the C2X standard. EXTENSION |
60 | directives are extensions. */ | |
93c80368 NB |
61 | #define KANDR 0 |
62 | #define STDC89 1 | |
71d38ec8 JM |
63 | #define STDC2X 2 |
64 | #define EXTENSION 3 | |
93c80368 NB |
65 | |
66 | /* Values for the flags field of struct directive. COND indicates a | |
67 | conditional; IF_COND an opening conditional. INCL means to treat | |
68 | "..." and <...> as q-char and h-char sequences respectively. IN_I | |
69 | means this directive should be handled even if -fpreprocessed is in | |
1a76916c NB |
70 | effect (these are the directives with callback hooks). |
71 | ||
71d38ec8 JM |
72 | EXPAND is set on directives that are always macro-expanded. |
73 | ||
74 | ELIFDEF is set on directives that are only handled for standards with the | |
75 | #elifdef / #elifndef feature. */ | |
93c80368 NB |
76 | #define COND (1 << 0) |
77 | #define IF_COND (1 << 1) | |
78 | #define INCL (1 << 2) | |
79 | #define IN_I (1 << 3) | |
1a76916c | 80 | #define EXPAND (1 << 4) |
899015a0 | 81 | #define DEPRECATED (1 << 5) |
71d38ec8 | 82 | #define ELIFDEF (1 << 6) |
93c80368 NB |
83 | |
84 | /* Defines one #-directive, including how to handle it. */ | |
6cf87ca4 | 85 | typedef void (*directive_handler) (cpp_reader *); |
93c80368 NB |
86 | typedef struct directive directive; |
87 | struct directive | |
88 | { | |
89 | directive_handler handler; /* Function to handle directive. */ | |
562a5c27 | 90 | const uchar *name; /* Name of directive. */ |
93c80368 NB |
91 | unsigned short length; /* Length of name. */ |
92 | unsigned char origin; /* Origin of directive. */ | |
93 | unsigned char flags; /* Flags describing this directive. */ | |
94 | }; | |
95 | ||
1316f1f7 ZW |
96 | /* Forward declarations. */ |
97 | ||
6cf87ca4 | 98 | static void skip_rest_of_line (cpp_reader *); |
a5cb563b | 99 | static void check_eol (cpp_reader *, bool); |
6cf87ca4 ZW |
100 | static void start_directive (cpp_reader *); |
101 | static void prepare_directive_trad (cpp_reader *); | |
102 | static void end_directive (cpp_reader *, int); | |
103 | static void directive_diagnostics (cpp_reader *, const directive *, int); | |
104 | static void run_directive (cpp_reader *, int, const char *, size_t); | |
105 | static char *glue_header_name (cpp_reader *); | |
a28fbdba | 106 | static const char *parse_include (cpp_reader *, int *, const cpp_token ***, |
620e594b | 107 | location_t *); |
6cf87ca4 ZW |
108 | static void push_conditional (cpp_reader *, int, int, const cpp_hashnode *); |
109 | static unsigned int read_flag (cpp_reader *, unsigned int); | |
3b8f20a1 | 110 | static bool strtolinenum (const uchar *, size_t, linenum_type *, bool *); |
c24300ba DM |
111 | static void do_diagnostic (cpp_reader *, enum cpp_diagnostic_level code, |
112 | enum cpp_warning_reason reason, int); | |
ee1c2a10 | 113 | static cpp_hashnode *lex_macro_node (cpp_reader *, bool); |
d1bd0ded | 114 | static int undefine_macros (cpp_reader *, cpp_hashnode *, void *); |
6cf87ca4 ZW |
115 | static void do_include_common (cpp_reader *, enum include_type); |
116 | static struct pragma_entry *lookup_pragma_entry (struct pragma_entry *, | |
117 | const cpp_hashnode *); | |
6cf87ca4 ZW |
118 | static int count_registered_pragmas (struct pragma_entry *); |
119 | static char ** save_registered_pragmas (struct pragma_entry *, char **); | |
120 | static char ** restore_registered_pragmas (cpp_reader *, struct pragma_entry *, | |
121 | char **); | |
122 | static void do_pragma_once (cpp_reader *); | |
123 | static void do_pragma_poison (cpp_reader *); | |
124 | static void do_pragma_system_header (cpp_reader *); | |
125 | static void do_pragma_dependency (cpp_reader *); | |
f591bd8f FW |
126 | static void do_pragma_warning_or_error (cpp_reader *, bool error); |
127 | static void do_pragma_warning (cpp_reader *); | |
128 | static void do_pragma_error (cpp_reader *); | |
6cf87ca4 ZW |
129 | static void do_linemarker (cpp_reader *); |
130 | static const cpp_token *get_token_no_padding (cpp_reader *); | |
131 | static const cpp_token *get__Pragma_string (cpp_reader *); | |
e2eb5056 | 132 | static void destringize_and_run (cpp_reader *, const cpp_string *, |
620e594b DM |
133 | location_t); |
134 | static bool parse_answer (cpp_reader *, int, location_t, cpp_macro **); | |
3fb558b1 NS |
135 | static cpp_hashnode *parse_assertion (cpp_reader *, int, cpp_macro **); |
136 | static cpp_macro **find_answer (cpp_hashnode *, const cpp_macro *); | |
6cf87ca4 | 137 | static void handle_assertion (cpp_reader *, const char *, int); |
17e7cb85 KT |
138 | static void do_pragma_push_macro (cpp_reader *); |
139 | static void do_pragma_pop_macro (cpp_reader *); | |
d6874138 | 140 | static void cpp_pop_definition (cpp_reader *, struct def_pragma_macro *); |
d481b69b | 141 | |
ff65e980 NS |
142 | /* This is the table of directive handlers. All extensions other than |
143 | #warning, #include_next, and #import are deprecated. The name is | |
144 | where the extension appears to have come from. */ | |
168d3732 | 145 | |
93c80368 | 146 | #define DIRECTIVE_TABLE \ |
ff65e980 NS |
147 | D(define, T_DEFINE = 0, KANDR, IN_I) \ |
148 | D(include, T_INCLUDE, KANDR, INCL | EXPAND) \ | |
149 | D(endif, T_ENDIF, KANDR, COND) \ | |
150 | D(ifdef, T_IFDEF, KANDR, COND | IF_COND) \ | |
151 | D(if, T_IF, KANDR, COND | IF_COND | EXPAND) \ | |
152 | D(else, T_ELSE, KANDR, COND) \ | |
153 | D(ifndef, T_IFNDEF, KANDR, COND | IF_COND) \ | |
154 | D(undef, T_UNDEF, KANDR, IN_I) \ | |
155 | D(line, T_LINE, KANDR, EXPAND) \ | |
156 | D(elif, T_ELIF, STDC89, COND | EXPAND) \ | |
71d38ec8 JM |
157 | D(elifdef, T_ELIFDEF, STDC2X, COND | ELIFDEF) \ |
158 | D(elifndef, T_ELIFNDEF, STDC2X, COND | ELIFDEF) \ | |
ff65e980 NS |
159 | D(error, T_ERROR, STDC89, 0) \ |
160 | D(pragma, T_PRAGMA, STDC89, IN_I) \ | |
161 | D(warning, T_WARNING, EXTENSION, 0) \ | |
162 | D(include_next, T_INCLUDE_NEXT, EXTENSION, INCL | EXPAND) \ | |
163 | D(ident, T_IDENT, EXTENSION, IN_I) \ | |
164 | D(import, T_IMPORT, EXTENSION, INCL | EXPAND) /* ObjC */ \ | |
165 | D(assert, T_ASSERT, EXTENSION, DEPRECATED) /* SVR4 */ \ | |
166 | D(unassert, T_UNASSERT, EXTENSION, DEPRECATED) /* SVR4 */ \ | |
167 | D(sccs, T_SCCS, EXTENSION, IN_I) /* SVR4? */ | |
1ed17cd5 ZW |
168 | |
169 | /* #sccs is synonymous with #ident. */ | |
170 | #define do_sccs do_ident | |
07aa0b04 | 171 | |
168d3732 ZW |
172 | /* Use the table to generate a series of prototypes, an enum for the |
173 | directive names, and an array of directive handlers. */ | |
174 | ||
6cf87ca4 | 175 | #define D(name, t, o, f) static void do_##name (cpp_reader *); |
168d3732 ZW |
176 | DIRECTIVE_TABLE |
177 | #undef D | |
178 | ||
041c3194 | 179 | #define D(n, tag, o, f) tag, |
168d3732 ZW |
180 | enum |
181 | { | |
182 | DIRECTIVE_TABLE | |
183 | N_DIRECTIVES | |
7f2935c7 | 184 | }; |
168d3732 ZW |
185 | #undef D |
186 | ||
041c3194 | 187 | #define D(name, t, origin, flags) \ |
9a238586 KG |
188 | { do_##name, (const uchar *) #name, \ |
189 | sizeof #name - 1, origin, flags }, | |
93c80368 | 190 | static const directive dtable[] = |
168d3732 ZW |
191 | { |
192 | DIRECTIVE_TABLE | |
193 | }; | |
194 | #undef D | |
cb18fd07 DM |
195 | |
196 | /* A NULL-terminated array of directive names for use | |
197 | when suggesting corrections for misspelled directives. */ | |
198 | #define D(name, t, origin, flags) #name, | |
199 | static const char * const directive_names[] = { | |
200 | DIRECTIVE_TABLE | |
201 | NULL | |
202 | }; | |
203 | #undef D | |
204 | ||
168d3732 | 205 | #undef DIRECTIVE_TABLE |
7f2935c7 | 206 | |
dcc229e5 ZW |
207 | /* Wrapper struct directive for linemarkers. |
208 | The origin is more or less true - the original K+R cpp | |
209 | did use this notation in its preprocessed output. */ | |
210 | static const directive linemarker_dir = | |
211 | { | |
b6baa67d | 212 | do_linemarker, UC"#", 1, KANDR, IN_I |
dcc229e5 ZW |
213 | }; |
214 | ||
93c80368 NB |
215 | /* Skip any remaining tokens in a directive. */ |
216 | static void | |
6cf87ca4 | 217 | skip_rest_of_line (cpp_reader *pfile) |
c5a04734 | 218 | { |
93c80368 | 219 | /* Discard all stacked contexts. */ |
8128cccf | 220 | while (pfile->context->prev) |
93c80368 NB |
221 | _cpp_pop_context (pfile); |
222 | ||
b528a07e | 223 | /* Sweep up all tokens remaining on the line. */ |
345894b4 NB |
224 | if (! SEEN_EOL ()) |
225 | while (_cpp_lex_token (pfile)->type != CPP_EOF) | |
226 | ; | |
93c80368 | 227 | } |
c5a04734 | 228 | |
81b5d104 MLI |
229 | /* Helper function for check_oel. */ |
230 | ||
93c80368 | 231 | static void |
c24300ba | 232 | check_eol_1 (cpp_reader *pfile, bool expand, enum cpp_warning_reason reason) |
93c80368 | 233 | { |
a5cb563b JM |
234 | if (! SEEN_EOL () && (expand |
235 | ? cpp_get_token (pfile) | |
236 | : _cpp_lex_token (pfile))->type != CPP_EOF) | |
81b5d104 MLI |
237 | cpp_pedwarning (pfile, reason, "extra tokens at end of #%s directive", |
238 | pfile->directive->name); | |
239 | } | |
240 | ||
241 | /* Variant of check_eol used for Wendif-labels warnings. */ | |
242 | ||
243 | static void | |
244 | check_eol_endif_labels (cpp_reader *pfile) | |
245 | { | |
246 | check_eol_1 (pfile, false, CPP_W_ENDIF_LABELS); | |
247 | } | |
248 | ||
249 | /* Ensure there are no stray tokens at the end of a directive. If | |
250 | EXPAND is true, tokens macro-expanding to nothing are allowed. */ | |
251 | ||
252 | static void | |
253 | check_eol (cpp_reader *pfile, bool expand) | |
254 | { | |
255 | check_eol_1 (pfile, expand, CPP_W_NONE); | |
93c80368 NB |
256 | } |
257 | ||
cbc43ae0 ILT |
258 | /* Ensure there are no stray tokens other than comments at the end of |
259 | a directive, and gather the comments. */ | |
260 | static const cpp_token ** | |
261 | check_eol_return_comments (cpp_reader *pfile) | |
262 | { | |
263 | size_t c; | |
264 | size_t capacity = 8; | |
265 | const cpp_token **buf; | |
266 | ||
267 | buf = XNEWVEC (const cpp_token *, capacity); | |
268 | c = 0; | |
269 | if (! SEEN_EOL ()) | |
270 | { | |
271 | while (1) | |
272 | { | |
273 | const cpp_token *tok; | |
274 | ||
275 | tok = _cpp_lex_token (pfile); | |
276 | if (tok->type == CPP_EOF) | |
277 | break; | |
278 | if (tok->type != CPP_COMMENT) | |
279 | cpp_error (pfile, CPP_DL_PEDWARN, | |
280 | "extra tokens at end of #%s directive", | |
281 | pfile->directive->name); | |
282 | else | |
283 | { | |
284 | if (c + 1 >= capacity) | |
285 | { | |
286 | capacity *= 2; | |
287 | buf = XRESIZEVEC (const cpp_token *, buf, capacity); | |
288 | } | |
289 | buf[c] = tok; | |
290 | ++c; | |
291 | } | |
292 | } | |
293 | } | |
294 | buf[c] = NULL; | |
295 | return buf; | |
296 | } | |
297 | ||
fe6c2db9 NB |
298 | /* Called when entering a directive, _Pragma or command-line directive. */ |
299 | static void | |
6cf87ca4 | 300 | start_directive (cpp_reader *pfile) |
93c80368 | 301 | { |
7f2f1a66 NB |
302 | /* Setup in-directive state. */ |
303 | pfile->state.in_directive = 1; | |
304 | pfile->state.save_comments = 0; | |
21b11495 | 305 | pfile->directive_result.type = CPP_PADDING; |
7f2f1a66 | 306 | |
93c80368 | 307 | /* Some handlers need the position of the # for diagnostics. */ |
500bee0a | 308 | pfile->directive_line = pfile->line_table->highest_line; |
fe6c2db9 NB |
309 | } |
310 | ||
311 | /* Called when leaving a directive, _Pragma or command-line directive. */ | |
312 | static void | |
6cf87ca4 | 313 | end_directive (cpp_reader *pfile, int skip_line) |
fe6c2db9 | 314 | { |
c5a62c6f | 315 | if (CPP_OPTION (pfile, traditional)) |
1a76916c | 316 | { |
d97371e0 | 317 | /* Revert change of prepare_directive_trad. */ |
c5a62c6f EB |
318 | if (!pfile->state.in_deferred_pragma) |
319 | pfile->state.prevent_expansion--; | |
d97371e0 | 320 | |
b66377c1 | 321 | if (pfile->directive != &dtable[T_DEFINE]) |
1a76916c NB |
322 | _cpp_remove_overlay (pfile); |
323 | } | |
c5a62c6f EB |
324 | else if (pfile->state.in_deferred_pragma) |
325 | ; | |
fe6c2db9 | 326 | /* We don't skip for an assembler #. */ |
b66377c1 | 327 | else if (skip_line) |
67821e3a NB |
328 | { |
329 | skip_rest_of_line (pfile); | |
bdcbe496 NB |
330 | if (!pfile->keep_tokens) |
331 | { | |
332 | pfile->cur_run = &pfile->base_run; | |
333 | pfile->cur_token = pfile->base_run.base; | |
334 | } | |
67821e3a | 335 | } |
fe6c2db9 NB |
336 | |
337 | /* Restore state. */ | |
fe6c2db9 NB |
338 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
339 | pfile->state.in_directive = 0; | |
d97371e0 | 340 | pfile->state.in_expression = 0; |
fe6c2db9 NB |
341 | pfile->state.angled_headers = 0; |
342 | pfile->directive = 0; | |
343 | } | |
344 | ||
1a76916c NB |
345 | /* Prepare to handle the directive in pfile->directive. */ |
346 | static void | |
6cf87ca4 | 347 | prepare_directive_trad (cpp_reader *pfile) |
1a76916c | 348 | { |
951a0766 | 349 | if (pfile->directive != &dtable[T_DEFINE]) |
1a76916c | 350 | { |
b66377c1 NB |
351 | bool no_expand = (pfile->directive |
352 | && ! (pfile->directive->flags & EXPAND)); | |
974c43f1 | 353 | bool was_skipping = pfile->state.skipping; |
1a76916c | 354 | |
d97371e0 NB |
355 | pfile->state.in_expression = (pfile->directive == &dtable[T_IF] |
356 | || pfile->directive == &dtable[T_ELIF]); | |
45f2492c NB |
357 | if (pfile->state.in_expression) |
358 | pfile->state.skipping = false; | |
359 | ||
1a76916c NB |
360 | if (no_expand) |
361 | pfile->state.prevent_expansion++; | |
fb136e35 | 362 | _cpp_scan_out_logical_line (pfile, NULL, false); |
1a76916c NB |
363 | if (no_expand) |
364 | pfile->state.prevent_expansion--; | |
45f2492c | 365 | |
974c43f1 | 366 | pfile->state.skipping = was_skipping; |
1a76916c NB |
367 | _cpp_overlay_buffer (pfile, pfile->out.base, |
368 | pfile->out.cur - pfile->out.base); | |
369 | } | |
d97371e0 NB |
370 | |
371 | /* Stop ISO C from expanding anything. */ | |
372 | pfile->state.prevent_expansion++; | |
1a76916c NB |
373 | } |
374 | ||
da7d8304 | 375 | /* Output diagnostics for a directive DIR. INDENTED is nonzero if |
18a9d8ff | 376 | the '#' was indented. */ |
18a9d8ff | 377 | static void |
6cf87ca4 | 378 | directive_diagnostics (cpp_reader *pfile, const directive *dir, int indented) |
18a9d8ff | 379 | { |
899015a0 TT |
380 | /* Issue -pedantic or deprecated warnings for extensions. We let |
381 | -pedantic take precedence if both are applicable. */ | |
382 | if (! pfile->state.skipping) | |
383 | { | |
384 | if (dir->origin == EXTENSION | |
385 | && !(dir == &dtable[T_IMPORT] && CPP_OPTION (pfile, objc)) | |
386 | && CPP_PEDANTIC (pfile)) | |
387 | cpp_error (pfile, CPP_DL_PEDWARN, "#%s is a GCC extension", dir->name); | |
388 | else if (((dir->flags & DEPRECATED) != 0 | |
389 | || (dir == &dtable[T_IMPORT] && !CPP_OPTION (pfile, objc))) | |
e3339d0f | 390 | && CPP_OPTION (pfile, cpp_warn_deprecated)) |
87cf0651 SB |
391 | cpp_warning (pfile, CPP_W_DEPRECATED, |
392 | "#%s is a deprecated GCC extension", dir->name); | |
899015a0 | 393 | } |
dcc229e5 ZW |
394 | |
395 | /* Traditionally, a directive is ignored unless its # is in | |
396 | column 1. Therefore in code intended to work with K+R | |
397 | compilers, directives added by C89 must have their # | |
398 | indented, and directives present in traditional C must not. | |
399 | This is true even of directives in skipped conditional | |
400 | blocks. #elif cannot be used at all. */ | |
401 | if (CPP_WTRADITIONAL (pfile)) | |
18a9d8ff | 402 | { |
dcc229e5 | 403 | if (dir == &dtable[T_ELIF]) |
87cf0651 SB |
404 | cpp_warning (pfile, CPP_W_TRADITIONAL, |
405 | "suggest not using #elif in traditional C"); | |
dcc229e5 | 406 | else if (indented && dir->origin == KANDR) |
87cf0651 SB |
407 | cpp_warning (pfile, CPP_W_TRADITIONAL, |
408 | "traditional C ignores #%s with the # indented", | |
409 | dir->name); | |
dcc229e5 | 410 | else if (!indented && dir->origin != KANDR) |
87cf0651 SB |
411 | cpp_warning (pfile, CPP_W_TRADITIONAL, |
412 | "suggest hiding #%s from traditional C with an indented #", | |
413 | dir->name); | |
18a9d8ff NB |
414 | } |
415 | } | |
416 | ||
a0be978a | 417 | /* Check if we have a known directive. INDENTED is true if the |
18a9d8ff | 418 | '#' of the directive was indented. This function is in this file |
a2566ae9 | 419 | to save unnecessarily exporting dtable etc. to lex.c. Returns |
da7d8304 | 420 | nonzero if the line of tokens has been handled, zero if we should |
18a9d8ff | 421 | continue processing the line. */ |
fe6c2db9 | 422 | int |
a0be978a | 423 | _cpp_handle_directive (cpp_reader *pfile, bool indented) |
fe6c2db9 | 424 | { |
fe6c2db9 | 425 | const directive *dir = 0; |
345894b4 | 426 | const cpp_token *dname; |
e808ec9c | 427 | bool was_parsing_args = pfile->state.parsing_args; |
c6e83800 | 428 | bool was_discarding_output = pfile->state.discarding_output; |
fe6c2db9 NB |
429 | int skip = 1; |
430 | ||
c6e83800 ZW |
431 | if (was_discarding_output) |
432 | pfile->state.prevent_expansion = 0; | |
433 | ||
e808ec9c NB |
434 | if (was_parsing_args) |
435 | { | |
e3339d0f | 436 | if (CPP_OPTION (pfile, cpp_pedantic)) |
0527bc4e | 437 | cpp_error (pfile, CPP_DL_PEDWARN, |
e808ec9c NB |
438 | "embedding a directive within macro arguments is not portable"); |
439 | pfile->state.parsing_args = 0; | |
440 | pfile->state.prevent_expansion = 0; | |
441 | } | |
fe6c2db9 | 442 | start_directive (pfile); |
345894b4 | 443 | dname = _cpp_lex_token (pfile); |
0d9f234d | 444 | |
345894b4 | 445 | if (dname->type == CPP_NAME) |
0d9f234d | 446 | { |
9a0c6187 | 447 | if (dname->val.node.node->is_directive) |
71d38ec8 JM |
448 | { |
449 | dir = &dtable[dname->val.node.node->directive_index]; | |
f43eb770 JJ |
450 | if ((dir->flags & ELIFDEF) |
451 | && !CPP_OPTION (pfile, elifdef) | |
452 | /* For -std=gnu* modes elifdef is supported with | |
453 | a pedwarn if pedantic. */ | |
454 | && CPP_OPTION (pfile, std)) | |
71d38ec8 JM |
455 | dir = 0; |
456 | } | |
0d9f234d | 457 | } |
05713b80 | 458 | /* We do not recognize the # followed by a number extension in |
18a9d8ff | 459 | assembler code. */ |
345894b4 | 460 | else if (dname->type == CPP_NUMBER && CPP_OPTION (pfile, lang) != CLK_ASM) |
0d9f234d | 461 | { |
dcc229e5 ZW |
462 | dir = &linemarker_dir; |
463 | if (CPP_PEDANTIC (pfile) && ! CPP_OPTION (pfile, preprocessed) | |
464 | && ! pfile->state.skipping) | |
0527bc4e | 465 | cpp_error (pfile, CPP_DL_PEDWARN, |
ebef4e8c | 466 | "style of line directive is a GCC extension"); |
93c80368 | 467 | } |
0d9f234d | 468 | |
93c80368 NB |
469 | if (dir) |
470 | { | |
18a9d8ff NB |
471 | /* If we have a directive that is not an opening conditional, |
472 | invalidate any control macro. */ | |
473 | if (! (dir->flags & IF_COND)) | |
474 | pfile->mi_valid = false; | |
475 | ||
476 | /* Kluge alert. In order to be sure that code like this | |
477 | ||
478 | #define HASH # | |
479 | HASH define foo bar | |
480 | ||
481 | does not cause '#define foo bar' to get executed when | |
482 | compiled with -save-temps, we recognize directives in | |
a2566ae9 | 483 | -fpreprocessed mode only if the # is in column 1. macro.c |
ccfc4c91 OW |
484 | puts a space in front of any '#' at the start of a macro. |
485 | ||
486 | We exclude the -fdirectives-only case because macro expansion | |
487 | has not been performed yet, and block comments can cause spaces | |
7d9641cc | 488 | to precede the directive. */ |
18a9d8ff | 489 | if (CPP_OPTION (pfile, preprocessed) |
ccfc4c91 | 490 | && !CPP_OPTION (pfile, directives_only) |
18a9d8ff | 491 | && (indented || !(dir->flags & IN_I))) |
6d4587f7 | 492 | { |
18a9d8ff NB |
493 | skip = 0; |
494 | dir = 0; | |
6d4587f7 ZW |
495 | } |
496 | else | |
93c80368 | 497 | { |
18a9d8ff NB |
498 | /* In failed conditional groups, all non-conditional |
499 | directives are ignored. Before doing that, whether | |
500 | skipping or not, we should lex angle-bracketed headers | |
501 | correctly, and maybe output some diagnostics. */ | |
502 | pfile->state.angled_headers = dir->flags & INCL; | |
a8d0ddaf | 503 | pfile->state.directive_wants_padding = dir->flags & INCL; |
18a9d8ff NB |
504 | if (! CPP_OPTION (pfile, preprocessed)) |
505 | directive_diagnostics (pfile, dir, indented); | |
506 | if (pfile->state.skipping && !(dir->flags & COND)) | |
507 | dir = 0; | |
93c80368 NB |
508 | } |
509 | } | |
345894b4 | 510 | else if (dname->type == CPP_EOF) |
18a9d8ff NB |
511 | ; /* CPP_EOF is the "null directive". */ |
512 | else | |
93c80368 NB |
513 | { |
514 | /* An unknown directive. Don't complain about it in assembly | |
515 | source: we don't know where the comments are, and # may | |
516 | introduce assembler pseudo-ops. Don't complain about invalid | |
517 | directives in skipped conditional groups (6.10 p4). */ | |
bdb05a7b | 518 | if (CPP_OPTION (pfile, lang) == CLK_ASM) |
18a9d8ff NB |
519 | skip = 0; |
520 | else if (!pfile->state.skipping) | |
cb18fd07 DM |
521 | { |
522 | const char *unrecognized | |
523 | = (const char *)cpp_token_as_text (pfile, dname); | |
524 | const char *hint = NULL; | |
525 | ||
526 | /* Call back into gcc to get a spelling suggestion. Ideally | |
527 | we'd just use best_match from gcc/spellcheck.h (and filter | |
528 | out the uncommon directives), but that requires moving it | |
529 | to a support library. */ | |
530 | if (pfile->cb.get_suggestion) | |
531 | hint = pfile->cb.get_suggestion (pfile, unrecognized, | |
532 | directive_names); | |
533 | ||
534 | if (hint) | |
535 | { | |
536 | rich_location richloc (pfile->line_table, dname->src_loc); | |
537 | source_range misspelled_token_range | |
538 | = get_range_from_loc (pfile->line_table, dname->src_loc); | |
539 | richloc.add_fixit_replace (misspelled_token_range, hint); | |
64a5912c DM |
540 | cpp_error_at (pfile, CPP_DL_ERROR, &richloc, |
541 | "invalid preprocessing directive #%s;" | |
542 | " did you mean #%s?", | |
543 | unrecognized, hint); | |
cb18fd07 DM |
544 | } |
545 | else | |
546 | cpp_error (pfile, CPP_DL_ERROR, | |
547 | "invalid preprocessing directive #%s", | |
548 | unrecognized); | |
549 | } | |
0d9f234d NB |
550 | } |
551 | ||
d1a58688 NB |
552 | pfile->directive = dir; |
553 | if (CPP_OPTION (pfile, traditional)) | |
554 | prepare_directive_trad (pfile); | |
555 | ||
18a9d8ff | 556 | if (dir) |
6cf87ca4 | 557 | pfile->directive->handler (pfile); |
18a9d8ff NB |
558 | else if (skip == 0) |
559 | _cpp_backup_tokens (pfile, 1); | |
560 | ||
561 | end_directive (pfile, skip); | |
765d600a | 562 | if (was_parsing_args && !pfile->state.in_deferred_pragma) |
e808ec9c NB |
563 | { |
564 | /* Restore state when within macro args. */ | |
565 | pfile->state.parsing_args = 2; | |
566 | pfile->state.prevent_expansion = 1; | |
e808ec9c | 567 | } |
c6e83800 ZW |
568 | if (was_discarding_output) |
569 | pfile->state.prevent_expansion = 1; | |
fe6c2db9 | 570 | return skip; |
041c3194 | 571 | } |
7f2935c7 | 572 | |
93c80368 | 573 | /* Directive handler wrapper used by the command line option |
26aea073 | 574 | processor. BUF is \n terminated. */ |
93c80368 | 575 | static void |
6cf87ca4 | 576 | run_directive (cpp_reader *pfile, int dir_no, const char *buf, size_t count) |
3fdc651f | 577 | { |
562a5c27 | 578 | cpp_push_buffer (pfile, (const uchar *) buf, count, |
40de9f76 | 579 | /* from_stage3 */ true); |
0bda4760 | 580 | start_directive (pfile); |
26aea073 NB |
581 | |
582 | /* This is a short-term fix to prevent a leading '#' being | |
583 | interpreted as a directive. */ | |
584 | _cpp_clean_line (pfile); | |
585 | ||
f71aebba | 586 | pfile->directive = &dtable[dir_no]; |
1a76916c NB |
587 | if (CPP_OPTION (pfile, traditional)) |
588 | prepare_directive_trad (pfile); | |
6cf87ca4 | 589 | pfile->directive->handler (pfile); |
0bda4760 | 590 | end_directive (pfile, 1); |
ef6e958a | 591 | _cpp_pop_buffer (pfile); |
93c80368 NB |
592 | } |
593 | ||
594 | /* Checks for validity the macro name in #define, #undef, #ifdef and | |
ee1c2a10 TT |
595 | #ifndef directives. IS_DEF_OR_UNDEF is true if this call is |
596 | processing a #define or #undefine directive, and false | |
597 | otherwise. */ | |
041c3194 | 598 | static cpp_hashnode * |
ee1c2a10 | 599 | lex_macro_node (cpp_reader *pfile, bool is_def_or_undef) |
041c3194 | 600 | { |
1a76916c | 601 | const cpp_token *token = _cpp_lex_token (pfile); |
ea4a453b | 602 | |
92936ecf | 603 | /* The token immediately after #define must be an identifier. That |
b8363a24 ZW |
604 | identifier may not be "defined", per C99 6.10.8p4. |
605 | In C++, it may not be any of the "named operators" either, | |
606 | per C++98 [lex.digraph], [lex.key]. | |
607 | Finally, the identifier may not have been poisoned. (In that case | |
1d63a28a | 608 | the lexer has issued the error message for us.) */ |
cbc69f84 | 609 | |
1a76916c NB |
610 | if (token->type == CPP_NAME) |
611 | { | |
9a0c6187 | 612 | cpp_hashnode *node = token->val.node.node; |
92936ecf | 613 | |
ad1a3914 | 614 | if (is_def_or_undef |
3d056cbf | 615 | && node == pfile->spec_nodes.n_defined) |
0527bc4e | 616 | cpp_error (pfile, CPP_DL_ERROR, |
ad1a3914 NS |
617 | "\"%s\" cannot be used as a macro name", |
618 | NODE_NAME (node)); | |
1a76916c NB |
619 | else if (! (node->flags & NODE_POISONED)) |
620 | return node; | |
ba89d661 | 621 | } |
1a76916c | 622 | else if (token->flags & NAMED_OP) |
0527bc4e | 623 | cpp_error (pfile, CPP_DL_ERROR, |
cbc69f84 | 624 | "\"%s\" cannot be used as a macro name as it is an operator in C++", |
9a0c6187 | 625 | NODE_NAME (token->val.node.node)); |
1a76916c | 626 | else if (token->type == CPP_EOF) |
0527bc4e | 627 | cpp_error (pfile, CPP_DL_ERROR, "no macro name given in #%s directive", |
1a76916c NB |
628 | pfile->directive->name); |
629 | else | |
0527bc4e | 630 | cpp_error (pfile, CPP_DL_ERROR, "macro names must be identifiers"); |
07aa0b04 | 631 | |
cbc69f84 | 632 | return NULL; |
7f2935c7 | 633 | } |
7f2935c7 | 634 | |
a2566ae9 | 635 | /* Process a #define directive. Most work is done in macro.c. */ |
711b8824 | 636 | static void |
6cf87ca4 | 637 | do_define (cpp_reader *pfile) |
7f2935c7 | 638 | { |
ee1c2a10 | 639 | cpp_hashnode *node = lex_macro_node (pfile, true); |
ff2b53ef | 640 | |
93c80368 NB |
641 | if (node) |
642 | { | |
1d63a28a NB |
643 | /* If we have been requested to expand comments into macros, |
644 | then re-enable saving of comments. */ | |
645 | pfile->state.save_comments = | |
646 | ! CPP_OPTION (pfile, discard_comments_in_macro_exp); | |
647 | ||
93d45d9e JM |
648 | if (pfile->cb.before_define) |
649 | pfile->cb.before_define (pfile); | |
650 | ||
93c80368 NB |
651 | if (_cpp_create_definition (pfile, node)) |
652 | if (pfile->cb.define) | |
6cf87ca4 | 653 | pfile->cb.define (pfile, pfile->directive_line, node); |
93d45d9e JM |
654 | |
655 | node->flags &= ~NODE_USED; | |
93c80368 | 656 | } |
041c3194 ZW |
657 | } |
658 | ||
5d8ebbd8 | 659 | /* Handle #undef. Mark the identifier NT_VOID in the hash table. */ |
711b8824 | 660 | static void |
6cf87ca4 | 661 | do_undef (cpp_reader *pfile) |
041c3194 | 662 | { |
ee1c2a10 | 663 | cpp_hashnode *node = lex_macro_node (pfile, true); |
9e62c811 | 664 | |
45f2492c | 665 | if (node) |
9e62c811 | 666 | { |
93d45d9e JM |
667 | if (pfile->cb.before_define) |
668 | pfile->cb.before_define (pfile); | |
669 | ||
58fea6af | 670 | if (pfile->cb.undef) |
6cf87ca4 | 671 | pfile->cb.undef (pfile, pfile->directive_line, node); |
9e62c811 | 672 | |
45f2492c NB |
673 | /* 6.10.3.5 paragraph 2: [#undef] is ignored if the specified |
674 | identifier is not currently defined as a macro name. */ | |
7692e253 | 675 | if (cpp_macro_p (node)) |
45f2492c NB |
676 | { |
677 | if (node->flags & NODE_WARN) | |
678 | cpp_error (pfile, CPP_DL_WARNING, | |
679 | "undefining \"%s\"", NODE_NAME (node)); | |
7692e253 | 680 | else if (cpp_builtin_macro_p (node) |
b753b37b MLI |
681 | && CPP_OPTION (pfile, warn_builtin_macro_redefined)) |
682 | cpp_warning_with_line (pfile, CPP_W_BUILTIN_MACRO_REDEFINED, | |
683 | pfile->directive_line, 0, | |
684 | "undefining \"%s\"", NODE_NAME (node)); | |
9e62c811 | 685 | |
13f93cf5 NS |
686 | if (node->value.macro |
687 | && CPP_OPTION (pfile, warn_unused_macros)) | |
45f2492c | 688 | _cpp_warn_if_unused_macro (pfile, node, NULL); |
a69cbaac | 689 | |
45f2492c NB |
690 | _cpp_free_definition (node); |
691 | } | |
9e62c811 | 692 | } |
45f2492c | 693 | |
a5cb563b | 694 | check_eol (pfile, false); |
7f2935c7 PB |
695 | } |
696 | ||
d1bd0ded GK |
697 | /* Undefine a single macro/assertion/whatever. */ |
698 | ||
699 | static int | |
c6e83800 | 700 | undefine_macros (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *h, |
d1bd0ded GK |
701 | void *data_p ATTRIBUTE_UNUSED) |
702 | { | |
c6e83800 ZW |
703 | /* Body of _cpp_free_definition inlined here for speed. |
704 | Macros and assertions no longer have anything to free. */ | |
705 | h->type = NT_VOID; | |
a570d97f NS |
706 | h->value.answers = NULL; |
707 | h->flags &= ~(NODE_POISONED|NODE_DISABLED|NODE_USED); | |
d1bd0ded GK |
708 | return 1; |
709 | } | |
710 | ||
711 | /* Undefine all macros and assertions. */ | |
712 | ||
713 | void | |
714 | cpp_undef_all (cpp_reader *pfile) | |
715 | { | |
716 | cpp_forall_identifiers (pfile, undefine_macros, NULL); | |
717 | } | |
718 | ||
719 | ||
93c80368 NB |
720 | /* Helper routine used by parse_include. Reinterpret the current line |
721 | as an h-char-sequence (< ... >); we are looking at the first token | |
74eb4b3e NB |
722 | after the <. Returns a malloced filename. */ |
723 | static char * | |
6cf87ca4 | 724 | glue_header_name (cpp_reader *pfile) |
93c80368 | 725 | { |
4ed5bcfb | 726 | const cpp_token *token; |
74eb4b3e | 727 | char *buffer; |
2450e0b8 | 728 | size_t len, total_len = 0, capacity = 1024; |
93c80368 NB |
729 | |
730 | /* To avoid lexed tokens overwriting our glued name, we can only | |
731 | allocate from the string pool once we've lexed everything. */ | |
c3f829c1 | 732 | buffer = XNEWVEC (char, capacity); |
93c80368 NB |
733 | for (;;) |
734 | { | |
a8d0ddaf | 735 | token = get_token_no_padding (pfile); |
93c80368 | 736 | |
74eb4b3e | 737 | if (token->type == CPP_GREATER) |
93c80368 | 738 | break; |
74eb4b3e NB |
739 | if (token->type == CPP_EOF) |
740 | { | |
0527bc4e | 741 | cpp_error (pfile, CPP_DL_ERROR, "missing terminating > character"); |
74eb4b3e NB |
742 | break; |
743 | } | |
93c80368 | 744 | |
59325650 | 745 | len = cpp_token_len (token) + 2; /* Leading space, terminating \0. */ |
2450e0b8 | 746 | if (total_len + len > capacity) |
93c80368 | 747 | { |
2450e0b8 | 748 | capacity = (capacity + len) * 2; |
c3f829c1 | 749 | buffer = XRESIZEVEC (char, buffer, capacity); |
93c80368 NB |
750 | } |
751 | ||
4ed5bcfb | 752 | if (token->flags & PREV_WHITE) |
2450e0b8 | 753 | buffer[total_len++] = ' '; |
93c80368 | 754 | |
47e20491 GK |
755 | total_len = (cpp_spell_token (pfile, token, (uchar *) &buffer[total_len], |
756 | true) | |
74eb4b3e | 757 | - (uchar *) buffer); |
93c80368 | 758 | } |
041c3194 | 759 | |
74eb4b3e NB |
760 | buffer[total_len] = '\0'; |
761 | return buffer; | |
93c80368 | 762 | } |
7f2935c7 | 763 | |
74eb4b3e NB |
764 | /* Returns the file name of #include, #include_next, #import and |
765 | #pragma dependency. The string is malloced and the caller should | |
a28fbdba MLI |
766 | free it. Returns NULL on error. LOCATION is the source location |
767 | of the file name. */ | |
768 | ||
74eb4b3e | 769 | static const char * |
cbc43ae0 | 770 | parse_include (cpp_reader *pfile, int *pangle_brackets, |
620e594b | 771 | const cpp_token ***buf, location_t *location) |
7f2935c7 | 772 | { |
74eb4b3e | 773 | char *fname; |
4ed5bcfb | 774 | const cpp_token *header; |
7f2935c7 | 775 | |
93c80368 | 776 | /* Allow macro expansion. */ |
a8d0ddaf | 777 | header = get_token_no_padding (pfile); |
a28fbdba | 778 | *location = header->src_loc; |
2c6e3f55 JJ |
779 | if ((header->type == CPP_STRING && header->val.str.text[0] != 'R') |
780 | || header->type == CPP_HEADER_NAME) | |
7f2935c7 | 781 | { |
c3f829c1 | 782 | fname = XNEWVEC (char, header->val.str.len - 1); |
6338b358 NB |
783 | memcpy (fname, header->val.str.text + 1, header->val.str.len - 2); |
784 | fname[header->val.str.len - 2] = '\0'; | |
74eb4b3e | 785 | *pangle_brackets = header->type == CPP_HEADER_NAME; |
7f2935c7 | 786 | } |
74eb4b3e | 787 | else if (header->type == CPP_LESS) |
7f2935c7 | 788 | { |
74eb4b3e NB |
789 | fname = glue_header_name (pfile); |
790 | *pangle_brackets = 1; | |
791 | } | |
792 | else | |
793 | { | |
794 | const unsigned char *dir; | |
795 | ||
796 | if (pfile->directive == &dtable[T_PRAGMA]) | |
b6baa67d | 797 | dir = UC"pragma dependency"; |
74eb4b3e NB |
798 | else |
799 | dir = pfile->directive->name; | |
0527bc4e | 800 | cpp_error (pfile, CPP_DL_ERROR, "#%s expects \"FILENAME\" or <FILENAME>", |
74eb4b3e NB |
801 | dir); |
802 | ||
4ed5bcfb | 803 | return NULL; |
7f2935c7 | 804 | } |
7f2935c7 | 805 | |
cda5e672 TT |
806 | if (pfile->directive == &dtable[T_PRAGMA]) |
807 | { | |
808 | /* This pragma allows extra tokens after the file name. */ | |
809 | } | |
810 | else if (buf == NULL || CPP_OPTION (pfile, discard_comments)) | |
61cc8223 | 811 | check_eol (pfile, true); |
cbc43ae0 ILT |
812 | else |
813 | { | |
814 | /* If we are not discarding comments, then gather them while | |
815 | doing the eol check. */ | |
816 | *buf = check_eol_return_comments (pfile); | |
817 | } | |
818 | ||
74eb4b3e | 819 | return fname; |
168d3732 | 820 | } |
3caee4a8 | 821 | |
ba133c96 | 822 | /* Handle #include, #include_next and #import. */ |
711b8824 | 823 | static void |
6cf87ca4 | 824 | do_include_common (cpp_reader *pfile, enum include_type type) |
168d3732 | 825 | { |
74eb4b3e NB |
826 | const char *fname; |
827 | int angle_brackets; | |
cbc43ae0 | 828 | const cpp_token **buf = NULL; |
620e594b | 829 | location_t location; |
cbc43ae0 ILT |
830 | |
831 | /* Re-enable saving of comments if requested, so that the include | |
832 | callback can dump comments which follow #include. */ | |
833 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
74eb4b3e | 834 | |
056f95ec NS |
835 | /* Tell the lexer this is an include directive -- we want it to |
836 | increment the line number even if this is the last line of a file. */ | |
837 | pfile->state.in_directive = 2; | |
838 | ||
a28fbdba | 839 | fname = parse_include (pfile, &angle_brackets, &buf, &location); |
74eb4b3e | 840 | if (!fname) |
705b0c05 | 841 | goto done; |
7f2935c7 | 842 | |
28303828 | 843 | if (!*fname) |
705b0c05 NS |
844 | { |
845 | cpp_error_with_line (pfile, CPP_DL_ERROR, location, 0, | |
846 | "empty filename in #%s", | |
847 | pfile->directive->name); | |
848 | goto done; | |
849 | } | |
28303828 | 850 | |
3963c2e0 | 851 | /* Prevent #include recursion. */ |
1c6ffbab QZ |
852 | if (pfile->line_table->depth >= CPP_OPTION (pfile, max_include_depth)) |
853 | cpp_error (pfile, | |
854 | CPP_DL_ERROR, | |
855 | "#include nested depth %u exceeds maximum of %u" | |
856 | " (use -fmax-include-depth=DEPTH to increase the maximum)", | |
857 | pfile->line_table->depth, | |
858 | CPP_OPTION (pfile, max_include_depth)); | |
74eb4b3e | 859 | else |
09b82253 | 860 | { |
74eb4b3e NB |
861 | /* Get out of macro context, if we are. */ |
862 | skip_rest_of_line (pfile); | |
09b82253 | 863 | |
74eb4b3e | 864 | if (pfile->cb.include) |
6cf87ca4 | 865 | pfile->cb.include (pfile, pfile->directive_line, |
cbc43ae0 ILT |
866 | pfile->directive->name, fname, angle_brackets, |
867 | buf); | |
3963c2e0 | 868 | |
ac81cf0b | 869 | _cpp_stack_include (pfile, fname, angle_brackets, type, location); |
74eb4b3e | 870 | } |
3963c2e0 | 871 | |
705b0c05 | 872 | done: |
cbc43ae0 ILT |
873 | XDELETEVEC (fname); |
874 | if (buf) | |
875 | XDELETEVEC (buf); | |
168d3732 | 876 | } |
e8037d57 | 877 | |
711b8824 | 878 | static void |
6cf87ca4 | 879 | do_include (cpp_reader *pfile) |
168d3732 | 880 | { |
ba133c96 NB |
881 | do_include_common (pfile, IT_INCLUDE); |
882 | } | |
168d3732 | 883 | |
ba133c96 | 884 | static void |
6cf87ca4 | 885 | do_import (cpp_reader *pfile) |
ba133c96 | 886 | { |
ba133c96 | 887 | do_include_common (pfile, IT_IMPORT); |
168d3732 | 888 | } |
7f2935c7 | 889 | |
711b8824 | 890 | static void |
6cf87ca4 | 891 | do_include_next (cpp_reader *pfile) |
168d3732 | 892 | { |
3963c2e0 ZW |
893 | enum include_type type = IT_INCLUDE_NEXT; |
894 | ||
895 | /* If this is the primary source file, warn and use the normal | |
896 | search logic. */ | |
bf425849 | 897 | if (_cpp_in_main_source_file (pfile)) |
3963c2e0 | 898 | { |
0527bc4e | 899 | cpp_error (pfile, CPP_DL_WARNING, |
3963c2e0 ZW |
900 | "#include_next in primary source file"); |
901 | type = IT_INCLUDE; | |
902 | } | |
903 | do_include_common (pfile, type); | |
7f2935c7 | 904 | } |
7f2935c7 | 905 | |
dcc229e5 ZW |
906 | /* Subroutine of do_linemarker. Read possible flags after file name. |
907 | LAST is the last flag seen; 0 if this is the first flag. Return the | |
908 | flag if it is valid, 0 at the end of the directive. Otherwise | |
909 | complain. */ | |
642ce434 | 910 | static unsigned int |
6cf87ca4 | 911 | read_flag (cpp_reader *pfile, unsigned int last) |
d3a34a0a | 912 | { |
345894b4 | 913 | const cpp_token *token = _cpp_lex_token (pfile); |
d3a34a0a | 914 | |
345894b4 | 915 | if (token->type == CPP_NUMBER && token->val.str.len == 1) |
d3a34a0a | 916 | { |
345894b4 | 917 | unsigned int flag = token->val.str.text[0] - '0'; |
28e0f040 NB |
918 | |
919 | if (flag > last && flag <= 4 | |
920 | && (flag != 4 || last == 3) | |
921 | && (flag != 2 || last == 0)) | |
922 | return flag; | |
d3a34a0a | 923 | } |
93c80368 | 924 | |
345894b4 | 925 | if (token->type != CPP_EOF) |
0527bc4e | 926 | cpp_error (pfile, CPP_DL_ERROR, "invalid flag \"%s\" in line directive", |
345894b4 | 927 | cpp_token_as_text (pfile, token)); |
93c80368 | 928 | return 0; |
d3a34a0a JM |
929 | } |
930 | ||
dcc229e5 | 931 | /* Subroutine of do_line and do_linemarker. Convert a number in STR, |
3b8f20a1 MLI |
932 | of length LEN, to binary; store it in NUMP, and return false if the |
933 | number was well-formed, true if not. WRAPPED is set to true if the | |
9ccffd12 | 934 | number did not fit into 'linenum_type'. */ |
3b8f20a1 MLI |
935 | static bool |
936 | strtolinenum (const uchar *str, size_t len, linenum_type *nump, bool *wrapped) | |
041c3194 | 937 | { |
1bb64668 | 938 | linenum_type reg = 0; |
3b8f20a1 | 939 | |
562a5c27 | 940 | uchar c; |
b24d8acb | 941 | bool seen_digit_sep = false; |
3b8f20a1 | 942 | *wrapped = false; |
041c3194 ZW |
943 | while (len--) |
944 | { | |
945 | c = *str++; | |
b24d8acb JM |
946 | if (!seen_digit_sep && c == '\'' && len) |
947 | { | |
948 | seen_digit_sep = true; | |
949 | continue; | |
950 | } | |
041c3194 | 951 | if (!ISDIGIT (c)) |
3b8f20a1 | 952 | return true; |
b24d8acb | 953 | seen_digit_sep = false; |
9ccffd12 JM |
954 | if (reg > ((linenum_type) -1) / 10) |
955 | *wrapped = true; | |
041c3194 | 956 | reg *= 10; |
9ccffd12 | 957 | if (reg > ((linenum_type) -1) - (c - '0')) |
3b8f20a1 | 958 | *wrapped = true; |
9ccffd12 | 959 | reg += c - '0'; |
041c3194 ZW |
960 | } |
961 | *nump = reg; | |
3b8f20a1 | 962 | return false; |
041c3194 ZW |
963 | } |
964 | ||
6de1e2a9 | 965 | /* Interpret #line command. |
dcc229e5 | 966 | Note that the filename string (if any) is a true string constant |
6bf2ff0d | 967 | (escapes are interpreted). */ |
711b8824 | 968 | static void |
6cf87ca4 | 969 | do_line (cpp_reader *pfile) |
7f2935c7 | 970 | { |
99b1c316 | 971 | class line_maps *line_table = pfile->line_table; |
0e50b624 | 972 | const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table); |
2203a881 DP |
973 | |
974 | /* skip_rest_of_line() may cause line table to be realloc()ed so note down | |
975 | sysp right now. */ | |
976 | ||
46427374 | 977 | unsigned char map_sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (map); |
4ed5bcfb | 978 | const cpp_token *token; |
46427374 | 979 | const char *new_file = ORDINARY_MAP_FILE_NAME (map); |
1bb64668 | 980 | linenum_type new_lineno; |
93c80368 | 981 | |
27e2564a | 982 | /* C99 raised the minimum limit on #line numbers. */ |
1bb64668 | 983 | linenum_type cap = CPP_OPTION (pfile, c99) ? 2147483647 : 32767; |
3b8f20a1 | 984 | bool wrapped; |
18a9d8ff | 985 | |
93c80368 | 986 | /* #line commands expand macros. */ |
4ed5bcfb NB |
987 | token = cpp_get_token (pfile); |
988 | if (token->type != CPP_NUMBER | |
1bb64668 | 989 | || strtolinenum (token->val.str.text, token->val.str.len, |
3b8f20a1 | 990 | &new_lineno, &wrapped)) |
7f2935c7 | 991 | { |
33ae4837 TT |
992 | if (token->type == CPP_EOF) |
993 | cpp_error (pfile, CPP_DL_ERROR, "unexpected end of file after #line"); | |
994 | else | |
995 | cpp_error (pfile, CPP_DL_ERROR, | |
996 | "\"%s\" after #line is not a positive integer", | |
997 | cpp_token_as_text (pfile, token)); | |
9ec7291f | 998 | return; |
df383483 | 999 | } |
7f2935c7 | 1000 | |
3b8f20a1 | 1001 | if (CPP_PEDANTIC (pfile) && (new_lineno == 0 || new_lineno > cap || wrapped)) |
0527bc4e | 1002 | cpp_error (pfile, CPP_DL_PEDWARN, "line number out of range"); |
3b8f20a1 MLI |
1003 | else if (wrapped) |
1004 | cpp_error (pfile, CPP_DL_WARNING, "line number out of range"); | |
7f2935c7 | 1005 | |
4ed5bcfb NB |
1006 | token = cpp_get_token (pfile); |
1007 | if (token->type == CPP_STRING) | |
5538ada6 | 1008 | { |
e6cc3a24 | 1009 | cpp_string s = { 0, 0 }; |
423e95e2 | 1010 | if (cpp_interpret_string_notranslate (pfile, &token->val.str, 1, |
f1bf410c | 1011 | &s, CPP_STRING)) |
e6cc3a24 | 1012 | new_file = (const char *)s.text; |
a5cb563b | 1013 | check_eol (pfile, true); |
dcc229e5 ZW |
1014 | } |
1015 | else if (token->type != CPP_EOF) | |
1016 | { | |
0527bc4e | 1017 | cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", |
dcc229e5 ZW |
1018 | cpp_token_as_text (pfile, token)); |
1019 | return; | |
1020 | } | |
1021 | ||
1022 | skip_rest_of_line (pfile); | |
c7f9c0b9 | 1023 | _cpp_do_file_change (pfile, LC_RENAME_VERBATIM, new_file, new_lineno, |
2203a881 | 1024 | map_sysp); |
c3388e62 | 1025 | line_table->seen_line_directive = true; |
dcc229e5 ZW |
1026 | } |
1027 | ||
1028 | /* Interpret the # 44 "file" [flags] notation, which has slightly | |
1029 | different syntax and semantics from #line: Flags are allowed, | |
1030 | and we never complain about the line number being too big. */ | |
1031 | static void | |
6cf87ca4 | 1032 | do_linemarker (cpp_reader *pfile) |
dcc229e5 | 1033 | { |
99b1c316 | 1034 | class line_maps *line_table = pfile->line_table; |
0e50b624 | 1035 | const line_map_ordinary *map = LINEMAPS_LAST_ORDINARY_MAP (line_table); |
dcc229e5 | 1036 | const cpp_token *token; |
46427374 | 1037 | const char *new_file = ORDINARY_MAP_FILE_NAME (map); |
1bb64668 | 1038 | linenum_type new_lineno; |
46427374 | 1039 | unsigned int new_sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (map); |
c7f9c0b9 | 1040 | enum lc_reason reason = LC_RENAME_VERBATIM; |
dcc229e5 | 1041 | int flag; |
3b8f20a1 | 1042 | bool wrapped; |
dcc229e5 ZW |
1043 | |
1044 | /* Back up so we can get the number again. Putting this in | |
1045 | _cpp_handle_directive risks two calls to _cpp_backup_tokens in | |
1046 | some circumstances, which can segfault. */ | |
1047 | _cpp_backup_tokens (pfile, 1); | |
1048 | ||
1049 | /* #line commands expand macros. */ | |
1050 | token = cpp_get_token (pfile); | |
1051 | if (token->type != CPP_NUMBER | |
1bb64668 | 1052 | || strtolinenum (token->val.str.text, token->val.str.len, |
3b8f20a1 | 1053 | &new_lineno, &wrapped)) |
dcc229e5 | 1054 | { |
33ae4837 TT |
1055 | /* Unlike #line, there does not seem to be a way to get an EOF |
1056 | here. So, it should be safe to always spell the token. */ | |
0527bc4e JDA |
1057 | cpp_error (pfile, CPP_DL_ERROR, |
1058 | "\"%s\" after # is not a positive integer", | |
dcc229e5 ZW |
1059 | cpp_token_as_text (pfile, token)); |
1060 | return; | |
df383483 | 1061 | } |
941e09b6 | 1062 | |
dcc229e5 ZW |
1063 | token = cpp_get_token (pfile); |
1064 | if (token->type == CPP_STRING) | |
1065 | { | |
e6cc3a24 | 1066 | cpp_string s = { 0, 0 }; |
423e95e2 | 1067 | if (cpp_interpret_string_notranslate (pfile, &token->val.str, |
f1bf410c | 1068 | 1, &s, CPP_STRING)) |
e6cc3a24 | 1069 | new_file = (const char *)s.text; |
cf551fba | 1070 | |
dcc229e5 ZW |
1071 | new_sysp = 0; |
1072 | flag = read_flag (pfile, 0); | |
1073 | if (flag == 1) | |
1074 | { | |
1075 | reason = LC_ENTER; | |
1076 | /* Fake an include for cpp_included (). */ | |
1077 | _cpp_fake_include (pfile, new_file); | |
1078 | flag = read_flag (pfile, flag); | |
1079 | } | |
1080 | else if (flag == 2) | |
1081 | { | |
1082 | reason = LC_LEAVE; | |
1083 | flag = read_flag (pfile, flag); | |
1084 | } | |
1085 | if (flag == 3) | |
93c80368 | 1086 | { |
dcc229e5 ZW |
1087 | new_sysp = 1; |
1088 | flag = read_flag (pfile, flag); | |
1089 | if (flag == 4) | |
1090 | new_sysp = 2; | |
93c80368 | 1091 | } |
9d30f270 | 1092 | pfile->buffer->sysp = new_sysp; |
dcc229e5 | 1093 | |
a5cb563b | 1094 | check_eol (pfile, false); |
041c3194 | 1095 | } |
4ed5bcfb | 1096 | else if (token->type != CPP_EOF) |
27e2564a | 1097 | { |
0527bc4e | 1098 | cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", |
4ed5bcfb | 1099 | cpp_token_as_text (pfile, token)); |
27e2564a NB |
1100 | return; |
1101 | } | |
7f2935c7 | 1102 | |
bdcbe496 | 1103 | skip_rest_of_line (pfile); |
00b0c19b | 1104 | |
3caf0ca1 BS |
1105 | if (reason == LC_LEAVE) |
1106 | { | |
12de2245 BS |
1107 | /* Reread map since cpp_get_token can invalidate it with a |
1108 | reallocation. */ | |
1109 | map = LINEMAPS_LAST_ORDINARY_MAP (line_table); | |
f10a9135 NS |
1110 | const line_map_ordinary *from |
1111 | = linemap_included_from_linemap (line_table, map); | |
400b8274 NS |
1112 | |
1113 | if (!from) | |
1114 | /* Not nested. */; | |
1115 | else if (!new_file[0]) | |
1116 | /* Leaving to "" means fill in the popped-to name. */ | |
1117 | new_file = ORDINARY_MAP_FILE_NAME (from); | |
1118 | else if (filename_cmp (ORDINARY_MAP_FILE_NAME (from), new_file) != 0) | |
1119 | /* It's the wrong name, Grommit! */ | |
1120 | from = NULL; | |
1121 | ||
1122 | if (!from) | |
3caf0ca1 BS |
1123 | { |
1124 | cpp_warning (pfile, CPP_W_NONE, | |
12de2245 BS |
1125 | "file \"%s\" linemarker ignored due to " |
1126 | "incorrect nesting", new_file); | |
3caf0ca1 BS |
1127 | return; |
1128 | } | |
1129 | } | |
400b8274 | 1130 | |
00b0c19b MLI |
1131 | /* Compensate for the increment in linemap_add that occurs in |
1132 | _cpp_do_file_change. We're currently at the start of the line | |
620e594b | 1133 | *following* the #line directive. A separate location_t for this |
00b0c19b MLI |
1134 | location makes no sense (until we do the LC_LEAVE), and |
1135 | complicates LAST_SOURCE_LINE_LOCATION. */ | |
1136 | pfile->line_table->highest_location--; | |
1137 | ||
bb74c963 | 1138 | _cpp_do_file_change (pfile, reason, new_file, new_lineno, new_sysp); |
c3388e62 | 1139 | line_table->seen_line_directive = true; |
27e2564a NB |
1140 | } |
1141 | ||
6bf2ff0d NS |
1142 | /* Arrange the file_change callback. Changing to TO_FILE:TO_LINE for |
1143 | REASON. SYSP is 1 for a system header, 2 for a system header that | |
1144 | needs to be extern "C" protected, and zero otherwise. */ | |
eb1f4d9d | 1145 | void |
6cf87ca4 | 1146 | _cpp_do_file_change (cpp_reader *pfile, enum lc_reason reason, |
6bf2ff0d | 1147 | const char *to_file, linenum_type to_line, |
6cf87ca4 | 1148 | unsigned int sysp) |
27e2564a | 1149 | { |
0e50b624 | 1150 | linemap_assert (reason != LC_ENTER_MACRO); |
6bf2ff0d | 1151 | |
0e50b624 | 1152 | const line_map_ordinary *ord_map = NULL; |
6bf2ff0d | 1153 | if (!to_line && reason == LC_RENAME_VERBATIM) |
0e50b624 | 1154 | { |
6bf2ff0d NS |
1155 | /* A linemarker moving to line zero. If we're on the second |
1156 | line of the current map, and it also starts at zero, just | |
1157 | rewind -- we're probably reading the builtins of a | |
1158 | preprocessed source. */ | |
1159 | line_map_ordinary *last = LINEMAPS_LAST_ORDINARY_MAP (pfile->line_table); | |
1160 | if (!ORDINARY_MAP_STARTING_LINE_NUMBER (last) | |
e9a2e208 | 1161 | && 0 == filename_cmp (to_file, ORDINARY_MAP_FILE_NAME (last)) |
6bf2ff0d NS |
1162 | && SOURCE_LINE (last, pfile->line_table->highest_line) == 2) |
1163 | { | |
1164 | ord_map = last; | |
1165 | pfile->line_table->highest_location | |
1166 | = pfile->line_table->highest_line = MAP_START_LOCATION (last); | |
1167 | } | |
0e50b624 | 1168 | } |
d82fc108 | 1169 | |
6bf2ff0d NS |
1170 | if (!ord_map) |
1171 | if (const line_map *map = linemap_add (pfile->line_table, reason, sysp, | |
1172 | to_file, to_line)) | |
1173 | { | |
1174 | ord_map = linemap_check_ordinary (map); | |
1175 | linemap_line_start (pfile->line_table, | |
1176 | ORDINARY_MAP_STARTING_LINE_NUMBER (ord_map), | |
1177 | 127); | |
1178 | } | |
1179 | ||
eb1f4d9d | 1180 | if (pfile->cb.file_change) |
0e50b624 | 1181 | pfile->cb.file_change (pfile, ord_map); |
7f2935c7 | 1182 | } |
941e09b6 | 1183 | |
5d8ebbd8 NB |
1184 | /* Report a warning or error detected by the program we are |
1185 | processing. Use the directive's tokens in the error message. */ | |
711b8824 | 1186 | static void |
c24300ba DM |
1187 | do_diagnostic (cpp_reader *pfile, enum cpp_diagnostic_level code, |
1188 | enum cpp_warning_reason reason, int print_dir) | |
7f2935c7 | 1189 | { |
5d6342eb TT |
1190 | const unsigned char *dir_name; |
1191 | unsigned char *line; | |
620e594b | 1192 | location_t src_loc = pfile->cur_token[-1].src_loc; |
5d6342eb TT |
1193 | |
1194 | if (print_dir) | |
1195 | dir_name = pfile->directive->name; | |
1196 | else | |
1197 | dir_name = NULL; | |
1198 | pfile->state.prevent_expansion++; | |
1199 | line = cpp_output_line_to_string (pfile, dir_name); | |
1200 | pfile->state.prevent_expansion--; | |
1201 | ||
87cf0651 SB |
1202 | if (code == CPP_DL_WARNING_SYSHDR && reason) |
1203 | cpp_warning_with_line_syshdr (pfile, reason, src_loc, 0, "%s", line); | |
1204 | else if (code == CPP_DL_WARNING && reason) | |
1205 | cpp_warning_with_line (pfile, reason, src_loc, 0, "%s", line); | |
1206 | else | |
1207 | cpp_error_with_line (pfile, code, src_loc, 0, "%s", line); | |
5d6342eb | 1208 | free (line); |
7f2935c7 PB |
1209 | } |
1210 | ||
838f313b | 1211 | static void |
6cf87ca4 | 1212 | do_error (cpp_reader *pfile) |
838f313b | 1213 | { |
c24300ba | 1214 | do_diagnostic (pfile, CPP_DL_ERROR, CPP_W_NONE, 1); |
838f313b | 1215 | } |
7f2935c7 | 1216 | |
711b8824 | 1217 | static void |
6cf87ca4 | 1218 | do_warning (cpp_reader *pfile) |
7f2935c7 | 1219 | { |
2f878973 | 1220 | /* We want #warning diagnostics to be emitted in system headers too. */ |
87cf0651 | 1221 | do_diagnostic (pfile, CPP_DL_WARNING_SYSHDR, CPP_W_WARNING_DIRECTIVE, 1); |
7f2935c7 PB |
1222 | } |
1223 | ||
a2a76ce7 | 1224 | /* Report program identification. */ |
711b8824 | 1225 | static void |
6cf87ca4 | 1226 | do_ident (cpp_reader *pfile) |
7f2935c7 | 1227 | { |
4ed5bcfb | 1228 | const cpp_token *str = cpp_get_token (pfile); |
58fea6af | 1229 | |
4ed5bcfb | 1230 | if (str->type != CPP_STRING) |
1ed17cd5 ZW |
1231 | cpp_error (pfile, CPP_DL_ERROR, "invalid #%s directive", |
1232 | pfile->directive->name); | |
93c80368 | 1233 | else if (pfile->cb.ident) |
6cf87ca4 | 1234 | pfile->cb.ident (pfile, pfile->directive_line, &str->val.str); |
a2a76ce7 | 1235 | |
a5cb563b | 1236 | check_eol (pfile, false); |
7f2935c7 PB |
1237 | } |
1238 | ||
a5da89c6 NB |
1239 | /* Lookup a PRAGMA name in a singly-linked CHAIN. Returns the |
1240 | matching entry, or NULL if none is found. The returned entry could | |
1241 | be the start of a namespace chain, or a pragma. */ | |
1242 | static struct pragma_entry * | |
6cf87ca4 | 1243 | lookup_pragma_entry (struct pragma_entry *chain, const cpp_hashnode *pragma) |
82443371 | 1244 | { |
4b115ff0 NB |
1245 | while (chain && chain->pragma != pragma) |
1246 | chain = chain->next; | |
a5da89c6 NB |
1247 | |
1248 | return chain; | |
1249 | } | |
1250 | ||
bc4071dd RH |
1251 | /* Create and insert a blank pragma entry at the beginning of a |
1252 | singly-linked CHAIN. */ | |
a5da89c6 | 1253 | static struct pragma_entry * |
bc4071dd | 1254 | new_pragma_entry (cpp_reader *pfile, struct pragma_entry **chain) |
82443371 | 1255 | { |
c3f829c1 | 1256 | struct pragma_entry *new_entry; |
58fea6af | 1257 | |
c3f829c1 | 1258 | new_entry = (struct pragma_entry *) |
8c3b2693 | 1259 | _cpp_aligned_alloc (pfile, sizeof (struct pragma_entry)); |
58fea6af | 1260 | |
bc4071dd | 1261 | memset (new_entry, 0, sizeof (struct pragma_entry)); |
c3f829c1 | 1262 | new_entry->next = *chain; |
bc4071dd | 1263 | |
c3f829c1 GDR |
1264 | *chain = new_entry; |
1265 | return new_entry; | |
58fea6af | 1266 | } |
82443371 | 1267 | |
a5da89c6 | 1268 | /* Register a pragma NAME in namespace SPACE. If SPACE is null, it |
bc4071dd RH |
1269 | goes in the global namespace. */ |
1270 | static struct pragma_entry * | |
1271 | register_pragma_1 (cpp_reader *pfile, const char *space, const char *name, | |
1272 | bool allow_name_expansion) | |
82443371 | 1273 | { |
a5da89c6 NB |
1274 | struct pragma_entry **chain = &pfile->pragmas; |
1275 | struct pragma_entry *entry; | |
4b115ff0 | 1276 | const cpp_hashnode *node; |
a5da89c6 | 1277 | |
a5da89c6 | 1278 | if (space) |
58fea6af | 1279 | { |
b6baa67d | 1280 | node = cpp_lookup (pfile, UC space, strlen (space)); |
4b115ff0 | 1281 | entry = lookup_pragma_entry (*chain, node); |
a5da89c6 | 1282 | if (!entry) |
bc4071dd RH |
1283 | { |
1284 | entry = new_pragma_entry (pfile, chain); | |
1285 | entry->pragma = node; | |
1286 | entry->is_nspace = true; | |
1287 | entry->allow_expansion = allow_name_expansion; | |
1288 | } | |
a5da89c6 NB |
1289 | else if (!entry->is_nspace) |
1290 | goto clash; | |
bc4071dd RH |
1291 | else if (entry->allow_expansion != allow_name_expansion) |
1292 | { | |
1293 | cpp_error (pfile, CPP_DL_ICE, | |
1294 | "registering pragmas in namespace \"%s\" with mismatched " | |
1295 | "name expansion", space); | |
1296 | return NULL; | |
1297 | } | |
a5da89c6 | 1298 | chain = &entry->u.space; |
58fea6af | 1299 | } |
bc4071dd RH |
1300 | else if (allow_name_expansion) |
1301 | { | |
1302 | cpp_error (pfile, CPP_DL_ICE, | |
1303 | "registering pragma \"%s\" with name expansion " | |
1304 | "and no namespace", name); | |
1305 | return NULL; | |
1306 | } | |
58fea6af | 1307 | |
a5da89c6 | 1308 | /* Check for duplicates. */ |
b6baa67d | 1309 | node = cpp_lookup (pfile, UC name, strlen (name)); |
4b115ff0 | 1310 | entry = lookup_pragma_entry (*chain, node); |
bc4071dd | 1311 | if (entry == NULL) |
a5da89c6 | 1312 | { |
bc4071dd RH |
1313 | entry = new_pragma_entry (pfile, chain); |
1314 | entry->pragma = node; | |
1315 | return entry; | |
a5da89c6 | 1316 | } |
bc4071dd RH |
1317 | |
1318 | if (entry->is_nspace) | |
1319 | clash: | |
1320 | cpp_error (pfile, CPP_DL_ICE, | |
1321 | "registering \"%s\" as both a pragma and a pragma namespace", | |
1322 | NODE_NAME (node)); | |
1323 | else if (space) | |
1324 | cpp_error (pfile, CPP_DL_ICE, "#pragma %s %s is already registered", | |
1325 | space, name); | |
a5da89c6 | 1326 | else |
bc4071dd RH |
1327 | cpp_error (pfile, CPP_DL_ICE, "#pragma %s is already registered", name); |
1328 | ||
1329 | return NULL; | |
1330 | } | |
1331 | ||
1332 | /* Register a cpplib internal pragma SPACE NAME with HANDLER. */ | |
1333 | static void | |
1334 | register_pragma_internal (cpp_reader *pfile, const char *space, | |
1335 | const char *name, pragma_cb handler) | |
1336 | { | |
1337 | struct pragma_entry *entry; | |
1338 | ||
1339 | entry = register_pragma_1 (pfile, space, name, false); | |
1340 | entry->is_internal = true; | |
1341 | entry->u.handler = handler; | |
21b11495 ZW |
1342 | } |
1343 | ||
1344 | /* Register a pragma NAME in namespace SPACE. If SPACE is null, it | |
1345 | goes in the global namespace. HANDLER is the handler it will call, | |
b5b3e36a DJ |
1346 | which must be non-NULL. If ALLOW_EXPANSION is set, allow macro |
1347 | expansion while parsing pragma NAME. This function is exported | |
1348 | from libcpp. */ | |
21b11495 ZW |
1349 | void |
1350 | cpp_register_pragma (cpp_reader *pfile, const char *space, const char *name, | |
b5b3e36a | 1351 | pragma_cb handler, bool allow_expansion) |
21b11495 | 1352 | { |
bc4071dd RH |
1353 | struct pragma_entry *entry; |
1354 | ||
1355 | if (!handler) | |
1356 | { | |
1357 | cpp_error (pfile, CPP_DL_ICE, "registering pragma with NULL handler"); | |
1358 | return; | |
1359 | } | |
1360 | ||
1361 | entry = register_pragma_1 (pfile, space, name, false); | |
1362 | if (entry) | |
1363 | { | |
1364 | entry->allow_expansion = allow_expansion; | |
1365 | entry->u.handler = handler; | |
1366 | } | |
58fea6af | 1367 | } |
a5da89c6 | 1368 | |
bc4071dd RH |
1369 | /* Similarly, but create mark the pragma for deferred processing. |
1370 | When found, a CPP_PRAGMA token will be insertted into the stream | |
1371 | with IDENT in the token->u.pragma slot. */ | |
1372 | void | |
1373 | cpp_register_deferred_pragma (cpp_reader *pfile, const char *space, | |
1374 | const char *name, unsigned int ident, | |
1375 | bool allow_expansion, bool allow_name_expansion) | |
1376 | { | |
1377 | struct pragma_entry *entry; | |
1378 | ||
1379 | entry = register_pragma_1 (pfile, space, name, allow_name_expansion); | |
1380 | if (entry) | |
1381 | { | |
1382 | entry->is_deferred = true; | |
1383 | entry->allow_expansion = allow_expansion; | |
1384 | entry->u.ident = ident; | |
1385 | } | |
1386 | } | |
1387 | ||
a5da89c6 | 1388 | /* Register the pragmas the preprocessor itself handles. */ |
58fea6af | 1389 | void |
6cf87ca4 | 1390 | _cpp_init_internal_pragmas (cpp_reader *pfile) |
58fea6af | 1391 | { |
a5da89c6 | 1392 | /* Pragmas in the global namespace. */ |
bc4071dd | 1393 | register_pragma_internal (pfile, 0, "once", do_pragma_once); |
17e7cb85 KT |
1394 | register_pragma_internal (pfile, 0, "push_macro", do_pragma_push_macro); |
1395 | register_pragma_internal (pfile, 0, "pop_macro", do_pragma_pop_macro); | |
58fea6af | 1396 | |
a5da89c6 | 1397 | /* New GCC-specific pragmas should be put in the GCC namespace. */ |
bc4071dd RH |
1398 | register_pragma_internal (pfile, "GCC", "poison", do_pragma_poison); |
1399 | register_pragma_internal (pfile, "GCC", "system_header", | |
1400 | do_pragma_system_header); | |
1401 | register_pragma_internal (pfile, "GCC", "dependency", do_pragma_dependency); | |
f591bd8f FW |
1402 | register_pragma_internal (pfile, "GCC", "warning", do_pragma_warning); |
1403 | register_pragma_internal (pfile, "GCC", "error", do_pragma_error); | |
82443371 | 1404 | } |
7f2935c7 | 1405 | |
17211ab5 GK |
1406 | /* Return the number of registered pragmas in PE. */ |
1407 | ||
1408 | static int | |
6cf87ca4 | 1409 | count_registered_pragmas (struct pragma_entry *pe) |
17211ab5 GK |
1410 | { |
1411 | int ct = 0; | |
1412 | for (; pe != NULL; pe = pe->next) | |
1413 | { | |
1414 | if (pe->is_nspace) | |
1415 | ct += count_registered_pragmas (pe->u.space); | |
1416 | ct++; | |
1417 | } | |
1418 | return ct; | |
1419 | } | |
1420 | ||
1421 | /* Save into SD the names of the registered pragmas referenced by PE, | |
1422 | and return a pointer to the next free space in SD. */ | |
1423 | ||
1424 | static char ** | |
6cf87ca4 | 1425 | save_registered_pragmas (struct pragma_entry *pe, char **sd) |
17211ab5 GK |
1426 | { |
1427 | for (; pe != NULL; pe = pe->next) | |
1428 | { | |
1429 | if (pe->is_nspace) | |
1430 | sd = save_registered_pragmas (pe->u.space, sd); | |
c3f829c1 GDR |
1431 | *sd++ = (char *) xmemdup (HT_STR (&pe->pragma->ident), |
1432 | HT_LEN (&pe->pragma->ident), | |
1433 | HT_LEN (&pe->pragma->ident) + 1); | |
17211ab5 GK |
1434 | } |
1435 | return sd; | |
1436 | } | |
1437 | ||
1438 | /* Return a newly-allocated array which saves the names of the | |
1439 | registered pragmas. */ | |
1440 | ||
1441 | char ** | |
6cf87ca4 | 1442 | _cpp_save_pragma_names (cpp_reader *pfile) |
17211ab5 GK |
1443 | { |
1444 | int ct = count_registered_pragmas (pfile->pragmas); | |
72bb2c39 | 1445 | char **result = XNEWVEC (char *, ct); |
17211ab5 GK |
1446 | (void) save_registered_pragmas (pfile->pragmas, result); |
1447 | return result; | |
1448 | } | |
1449 | ||
1450 | /* Restore from SD the names of the registered pragmas referenced by PE, | |
1451 | and return a pointer to the next unused name in SD. */ | |
1452 | ||
1453 | static char ** | |
6cf87ca4 ZW |
1454 | restore_registered_pragmas (cpp_reader *pfile, struct pragma_entry *pe, |
1455 | char **sd) | |
17211ab5 GK |
1456 | { |
1457 | for (; pe != NULL; pe = pe->next) | |
1458 | { | |
1459 | if (pe->is_nspace) | |
1460 | sd = restore_registered_pragmas (pfile, pe->u.space, sd); | |
b6baa67d | 1461 | pe->pragma = cpp_lookup (pfile, UC *sd, strlen (*sd)); |
17211ab5 GK |
1462 | free (*sd); |
1463 | sd++; | |
1464 | } | |
1465 | return sd; | |
1466 | } | |
1467 | ||
1468 | /* Restore the names of the registered pragmas from SAVED. */ | |
1469 | ||
1470 | void | |
6cf87ca4 | 1471 | _cpp_restore_pragma_names (cpp_reader *pfile, char **saved) |
17211ab5 GK |
1472 | { |
1473 | (void) restore_registered_pragmas (pfile, pfile->pragmas, saved); | |
1474 | free (saved); | |
1475 | } | |
1476 | ||
a5da89c6 NB |
1477 | /* Pragmata handling. We handle some, and pass the rest on to the |
1478 | front end. C99 defines three pragmas and says that no macro | |
1479 | expansion is to be performed on them; whether or not macro | |
1480 | expansion happens for other pragmas is implementation defined. | |
bc4071dd RH |
1481 | This implementation allows for a mix of both, since GCC did not |
1482 | traditionally macro expand its (few) pragmas, whereas OpenMP | |
1483 | specifies that macro expansion should happen. */ | |
711b8824 | 1484 | static void |
6cf87ca4 | 1485 | do_pragma (cpp_reader *pfile) |
7f2935c7 | 1486 | { |
a5da89c6 | 1487 | const struct pragma_entry *p = NULL; |
f3d25c65 | 1488 | const cpp_token *token, *pragma_token; |
620e594b | 1489 | location_t pragma_token_virt_loc = 0; |
1c90c6f9 | 1490 | cpp_token ns_token; |
a5da89c6 | 1491 | unsigned int count = 1; |
add7091b | 1492 | |
93c80368 | 1493 | pfile->state.prevent_expansion++; |
58fea6af | 1494 | |
f3d25c65 DS |
1495 | pragma_token = token = cpp_get_token_with_location (pfile, |
1496 | &pragma_token_virt_loc); | |
1c90c6f9 | 1497 | ns_token = *token; |
4ed5bcfb | 1498 | if (token->type == CPP_NAME) |
0172e2bc | 1499 | { |
9a0c6187 | 1500 | p = lookup_pragma_entry (pfile->pragmas, token->val.node.node); |
a5da89c6 | 1501 | if (p && p->is_nspace) |
58fea6af | 1502 | { |
bc4071dd RH |
1503 | bool allow_name_expansion = p->allow_expansion; |
1504 | if (allow_name_expansion) | |
828a7f76 | 1505 | pfile->state.prevent_expansion--; |
38fbfaf6 | 1506 | |
a5da89c6 NB |
1507 | token = cpp_get_token (pfile); |
1508 | if (token->type == CPP_NAME) | |
9a0c6187 | 1509 | p = lookup_pragma_entry (p->u.space, token->val.node.node); |
a5da89c6 NB |
1510 | else |
1511 | p = NULL; | |
bc4071dd RH |
1512 | if (allow_name_expansion) |
1513 | pfile->state.prevent_expansion++; | |
1514 | count = 2; | |
58fea6af | 1515 | } |
58fea6af | 1516 | } |
041c3194 | 1517 | |
3da3d587 | 1518 | if (p) |
e2e1fa50 | 1519 | { |
bc4071dd RH |
1520 | if (p->is_deferred) |
1521 | { | |
f3d25c65 | 1522 | pfile->directive_result.src_loc = pragma_token_virt_loc; |
bc4071dd RH |
1523 | pfile->directive_result.type = CPP_PRAGMA; |
1524 | pfile->directive_result.flags = pragma_token->flags; | |
1525 | pfile->directive_result.val.pragma = p->u.ident; | |
1526 | pfile->state.in_deferred_pragma = true; | |
1527 | pfile->state.pragma_allow_expansion = p->allow_expansion; | |
1528 | if (!p->allow_expansion) | |
1529 | pfile->state.prevent_expansion++; | |
1530 | } | |
1531 | else | |
3da3d587 | 1532 | { |
bc4071dd RH |
1533 | /* Since the handler below doesn't get the line number, that |
1534 | it might need for diagnostics, make sure it has the right | |
3da3d587 ZW |
1535 | numbers in place. */ |
1536 | if (pfile->cb.line_change) | |
1537 | (*pfile->cb.line_change) (pfile, pragma_token, false); | |
bc4071dd | 1538 | if (p->allow_expansion) |
b5b3e36a | 1539 | pfile->state.prevent_expansion--; |
3da3d587 | 1540 | (*p->u.handler) (pfile); |
bc4071dd | 1541 | if (p->allow_expansion) |
b5b3e36a | 1542 | pfile->state.prevent_expansion++; |
3da3d587 | 1543 | } |
21b11495 | 1544 | } |
d82fc108 | 1545 | else if (pfile->cb.def_pragma) |
bdcbe496 | 1546 | { |
1c90c6f9 JJ |
1547 | if (count == 1 || pfile->context->prev == NULL) |
1548 | _cpp_backup_tokens (pfile, count); | |
1549 | else | |
1550 | { | |
1551 | /* Invalid name comes from macro expansion, _cpp_backup_tokens | |
1552 | won't allow backing 2 tokens. */ | |
1553 | /* ??? The token buffer is leaked. Perhaps if def_pragma hook | |
1554 | reads both tokens, we could perhaps free it, but if it doesn't, | |
1555 | we don't know the exact lifespan. */ | |
1556 | cpp_token *toks = XNEWVEC (cpp_token, 2); | |
1557 | toks[0] = ns_token; | |
1558 | toks[0].flags |= NO_EXPAND; | |
1559 | toks[1] = *token; | |
1560 | toks[1].flags |= NO_EXPAND; | |
1561 | _cpp_push_token_context (pfile, NULL, toks, 2); | |
1562 | } | |
6cf87ca4 | 1563 | pfile->cb.def_pragma (pfile, pfile->directive_line); |
bdcbe496 | 1564 | } |
a5da89c6 | 1565 | |
97293897 | 1566 | pfile->state.prevent_expansion--; |
82443371 NS |
1567 | } |
1568 | ||
5d8ebbd8 | 1569 | /* Handle #pragma once. */ |
58fea6af | 1570 | static void |
6cf87ca4 | 1571 | do_pragma_once (cpp_reader *pfile) |
a2a76ce7 | 1572 | { |
bf425849 | 1573 | if (_cpp_in_main_source_file (pfile)) |
0527bc4e | 1574 | cpp_error (pfile, CPP_DL_WARNING, "#pragma once in main file"); |
93c80368 | 1575 | |
a5cb563b | 1576 | check_eol (pfile, false); |
49634b3a | 1577 | _cpp_mark_file_once_only (pfile, pfile->buffer->file); |
a2a76ce7 | 1578 | } |
fc009f96 | 1579 | |
17e7cb85 KT |
1580 | /* Handle #pragma push_macro(STRING). */ |
1581 | static void | |
1582 | do_pragma_push_macro (cpp_reader *pfile) | |
1583 | { | |
d6874138 KT |
1584 | cpp_hashnode *node; |
1585 | size_t defnlen; | |
1586 | const uchar *defn = NULL; | |
17e7cb85 KT |
1587 | char *macroname, *dest; |
1588 | const char *limit, *src; | |
1589 | const cpp_token *txt; | |
1590 | struct def_pragma_macro *c; | |
1591 | ||
1592 | txt = get__Pragma_string (pfile); | |
1593 | if (!txt) | |
1594 | { | |
620e594b | 1595 | location_t src_loc = pfile->cur_token[-1].src_loc; |
17e7cb85 KT |
1596 | cpp_error_with_line (pfile, CPP_DL_ERROR, src_loc, 0, |
1597 | "invalid #pragma push_macro directive"); | |
1598 | check_eol (pfile, false); | |
1599 | skip_rest_of_line (pfile); | |
1600 | return; | |
1601 | } | |
1602 | dest = macroname = (char *) alloca (txt->val.str.len + 2); | |
1603 | src = (const char *) (txt->val.str.text + 1 + (txt->val.str.text[0] == 'L')); | |
1604 | limit = (const char *) (txt->val.str.text + txt->val.str.len - 1); | |
1605 | while (src < limit) | |
1606 | { | |
1607 | /* We know there is a character following the backslash. */ | |
1608 | if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
1609 | src++; | |
1610 | *dest++ = *src++; | |
1611 | } | |
1612 | *dest = 0; | |
1613 | check_eol (pfile, false); | |
1614 | skip_rest_of_line (pfile); | |
1615 | c = XNEW (struct def_pragma_macro); | |
d6874138 | 1616 | memset (c, 0, sizeof (struct def_pragma_macro)); |
17e7cb85 KT |
1617 | c->name = XNEWVAR (char, strlen (macroname) + 1); |
1618 | strcpy (c->name, macroname); | |
1619 | c->next = pfile->pushed_macros; | |
d6874138 KT |
1620 | node = _cpp_lex_identifier (pfile, c->name); |
1621 | if (node->type == NT_VOID) | |
1622 | c->is_undef = 1; | |
aa23e73b JJ |
1623 | else if (node->type == NT_BUILTIN_MACRO) |
1624 | c->is_builtin = 1; | |
d6874138 KT |
1625 | else |
1626 | { | |
1627 | defn = cpp_macro_definition (pfile, node); | |
1628 | defnlen = ustrlen (defn); | |
1629 | c->definition = XNEWVEC (uchar, defnlen + 2); | |
1630 | c->definition[defnlen] = '\n'; | |
1631 | c->definition[defnlen + 1] = 0; | |
1632 | c->line = node->value.macro->line; | |
1633 | c->syshdr = node->value.macro->syshdr; | |
1634 | c->used = node->value.macro->used; | |
1635 | memcpy (c->definition, defn, defnlen); | |
1636 | } | |
1637 | ||
17e7cb85 KT |
1638 | pfile->pushed_macros = c; |
1639 | } | |
1640 | ||
1641 | /* Handle #pragma pop_macro(STRING). */ | |
1642 | static void | |
1643 | do_pragma_pop_macro (cpp_reader *pfile) | |
1644 | { | |
1645 | char *macroname, *dest; | |
1646 | const char *limit, *src; | |
1647 | const cpp_token *txt; | |
1648 | struct def_pragma_macro *l = NULL, *c = pfile->pushed_macros; | |
1649 | txt = get__Pragma_string (pfile); | |
1650 | if (!txt) | |
1651 | { | |
620e594b | 1652 | location_t src_loc = pfile->cur_token[-1].src_loc; |
17e7cb85 KT |
1653 | cpp_error_with_line (pfile, CPP_DL_ERROR, src_loc, 0, |
1654 | "invalid #pragma pop_macro directive"); | |
1655 | check_eol (pfile, false); | |
1656 | skip_rest_of_line (pfile); | |
1657 | return; | |
1658 | } | |
1659 | dest = macroname = (char *) alloca (txt->val.str.len + 2); | |
1660 | src = (const char *) (txt->val.str.text + 1 + (txt->val.str.text[0] == 'L')); | |
1661 | limit = (const char *) (txt->val.str.text + txt->val.str.len - 1); | |
1662 | while (src < limit) | |
1663 | { | |
1664 | /* We know there is a character following the backslash. */ | |
1665 | if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
1666 | src++; | |
1667 | *dest++ = *src++; | |
1668 | } | |
1669 | *dest = 0; | |
1670 | check_eol (pfile, false); | |
1671 | skip_rest_of_line (pfile); | |
1672 | ||
1673 | while (c != NULL) | |
1674 | { | |
1675 | if (!strcmp (c->name, macroname)) | |
1676 | { | |
1677 | if (!l) | |
1678 | pfile->pushed_macros = c->next; | |
1679 | else | |
1680 | l->next = c->next; | |
d6874138 KT |
1681 | cpp_pop_definition (pfile, c); |
1682 | free (c->definition); | |
17e7cb85 KT |
1683 | free (c->name); |
1684 | free (c); | |
1685 | break; | |
1686 | } | |
1687 | l = c; | |
1688 | c = c->next; | |
1689 | } | |
1690 | } | |
1691 | ||
c3bf3e6e NB |
1692 | /* Handle #pragma GCC poison, to poison one or more identifiers so |
1693 | that the lexer produces a hard error for each subsequent usage. */ | |
58fea6af | 1694 | static void |
6cf87ca4 | 1695 | do_pragma_poison (cpp_reader *pfile) |
a2a76ce7 | 1696 | { |
345894b4 | 1697 | const cpp_token *tok; |
f8f769ea | 1698 | cpp_hashnode *hp; |
a2a76ce7 | 1699 | |
93c80368 | 1700 | pfile->state.poisoned_ok = 1; |
a2a76ce7 ZW |
1701 | for (;;) |
1702 | { | |
345894b4 NB |
1703 | tok = _cpp_lex_token (pfile); |
1704 | if (tok->type == CPP_EOF) | |
a2a76ce7 | 1705 | break; |
345894b4 | 1706 | if (tok->type != CPP_NAME) |
fc009f96 | 1707 | { |
0527bc4e JDA |
1708 | cpp_error (pfile, CPP_DL_ERROR, |
1709 | "invalid #pragma GCC poison directive"); | |
93c80368 | 1710 | break; |
fc009f96 GK |
1711 | } |
1712 | ||
9a0c6187 | 1713 | hp = tok->val.node.node; |
93c80368 NB |
1714 | if (hp->flags & NODE_POISONED) |
1715 | continue; | |
1716 | ||
3f6677f4 | 1717 | if (cpp_macro_p (hp)) |
0527bc4e | 1718 | cpp_error (pfile, CPP_DL_WARNING, "poisoning existing macro \"%s\"", |
ebef4e8c | 1719 | NODE_NAME (hp)); |
93c80368 NB |
1720 | _cpp_free_definition (hp); |
1721 | hp->flags |= NODE_POISONED | NODE_DIAGNOSTIC; | |
fc009f96 | 1722 | } |
93c80368 | 1723 | pfile->state.poisoned_ok = 0; |
7f2935c7 | 1724 | } |
2c0b35cb ZW |
1725 | |
1726 | /* Mark the current header as a system header. This will suppress | |
1727 | some categories of warnings (notably those from -pedantic). It is | |
1728 | intended for use in system libraries that cannot be implemented in | |
1729 | conforming C, but cannot be certain that their headers appear in a | |
1730 | system include directory. To prevent abuse, it is rejected in the | |
1731 | primary source file. */ | |
58fea6af | 1732 | static void |
6cf87ca4 | 1733 | do_pragma_system_header (cpp_reader *pfile) |
2c0b35cb | 1734 | { |
bf425849 | 1735 | if (_cpp_in_main_source_file (pfile)) |
0527bc4e | 1736 | cpp_error (pfile, CPP_DL_WARNING, |
ebef4e8c | 1737 | "#pragma system_header ignored outside include file"); |
2c0b35cb | 1738 | else |
d82fc108 | 1739 | { |
a5cb563b | 1740 | check_eol (pfile, false); |
bdcbe496 | 1741 | skip_rest_of_line (pfile); |
d82fc108 NB |
1742 | cpp_make_system_header (pfile, 1, 0); |
1743 | } | |
2c0b35cb | 1744 | } |
f3f751ad NS |
1745 | |
1746 | /* Check the modified date of the current include file against a specified | |
1747 | file. Issue a diagnostic, if the specified file is newer. We use this to | |
1748 | determine if a fixed header should be refixed. */ | |
58fea6af | 1749 | static void |
6cf87ca4 | 1750 | do_pragma_dependency (cpp_reader *pfile) |
f3f751ad | 1751 | { |
74eb4b3e NB |
1752 | const char *fname; |
1753 | int angle_brackets, ordering; | |
620e594b | 1754 | location_t location; |
df383483 | 1755 | |
a28fbdba | 1756 | fname = parse_include (pfile, &angle_brackets, NULL, &location); |
74eb4b3e | 1757 | if (!fname) |
58fea6af | 1758 | return; |
041c3194 | 1759 | |
74eb4b3e | 1760 | ordering = _cpp_compare_file_date (pfile, fname, angle_brackets); |
f3f751ad | 1761 | if (ordering < 0) |
0527bc4e | 1762 | cpp_error (pfile, CPP_DL_WARNING, "cannot find source file %s", fname); |
f3f751ad NS |
1763 | else if (ordering > 0) |
1764 | { | |
0527bc4e JDA |
1765 | cpp_error (pfile, CPP_DL_WARNING, |
1766 | "current file is older than %s", fname); | |
4ed5bcfb | 1767 | if (cpp_get_token (pfile)->type != CPP_EOF) |
bdcbe496 NB |
1768 | { |
1769 | _cpp_backup_tokens (pfile, 1); | |
c24300ba | 1770 | do_diagnostic (pfile, CPP_DL_WARNING, CPP_W_NONE, 0); |
bdcbe496 | 1771 | } |
f3f751ad | 1772 | } |
74eb4b3e | 1773 | |
fad205ff | 1774 | free ((void *) fname); |
f3f751ad NS |
1775 | } |
1776 | ||
f591bd8f FW |
1777 | /* Issue a diagnostic with the message taken from the pragma. If |
1778 | ERROR is true, the diagnostic is a warning, otherwise, it is an | |
1779 | error. */ | |
1780 | static void | |
1781 | do_pragma_warning_or_error (cpp_reader *pfile, bool error) | |
1782 | { | |
1783 | const cpp_token *tok = _cpp_lex_token (pfile); | |
1784 | cpp_string str; | |
1785 | if (tok->type != CPP_STRING | |
1786 | || !cpp_interpret_string_notranslate (pfile, &tok->val.str, 1, &str, | |
1787 | CPP_STRING) | |
1788 | || str.len == 0) | |
1789 | { | |
1790 | cpp_error (pfile, CPP_DL_ERROR, "invalid \"#pragma GCC %s\" directive", | |
1791 | error ? "error" : "warning"); | |
1792 | return; | |
1793 | } | |
1794 | cpp_error (pfile, error ? CPP_DL_ERROR : CPP_DL_WARNING, | |
1795 | "%s", str.text); | |
1796 | free ((void *)str.text); | |
1797 | } | |
1798 | ||
1799 | /* Issue a warning diagnostic. */ | |
1800 | static void | |
1801 | do_pragma_warning (cpp_reader *pfile) | |
1802 | { | |
1803 | do_pragma_warning_or_error (pfile, false); | |
1804 | } | |
1805 | ||
1806 | /* Issue an error diagnostic. */ | |
1807 | static void | |
1808 | do_pragma_error (cpp_reader *pfile) | |
1809 | { | |
1810 | do_pragma_warning_or_error (pfile, true); | |
1811 | } | |
1812 | ||
4ed5bcfb NB |
1813 | /* Get a token but skip padding. */ |
1814 | static const cpp_token * | |
6cf87ca4 | 1815 | get_token_no_padding (cpp_reader *pfile) |
a5c3cccd | 1816 | { |
4ed5bcfb NB |
1817 | for (;;) |
1818 | { | |
1819 | const cpp_token *result = cpp_get_token (pfile); | |
1820 | if (result->type != CPP_PADDING) | |
1821 | return result; | |
1822 | } | |
1823 | } | |
a5c3cccd | 1824 | |
4ed5bcfb NB |
1825 | /* Check syntax is "(string-literal)". Returns the string on success, |
1826 | or NULL on failure. */ | |
1827 | static const cpp_token * | |
6cf87ca4 | 1828 | get__Pragma_string (cpp_reader *pfile) |
4ed5bcfb NB |
1829 | { |
1830 | const cpp_token *string; | |
5b9a40df | 1831 | const cpp_token *paren; |
a5c3cccd | 1832 | |
5b9a40df TT |
1833 | paren = get_token_no_padding (pfile); |
1834 | if (paren->type == CPP_EOF) | |
1835 | _cpp_backup_tokens (pfile, 1); | |
1836 | if (paren->type != CPP_OPEN_PAREN) | |
4ed5bcfb NB |
1837 | return NULL; |
1838 | ||
1839 | string = get_token_no_padding (pfile); | |
5b9a40df TT |
1840 | if (string->type == CPP_EOF) |
1841 | _cpp_backup_tokens (pfile, 1); | |
b6baa67d | 1842 | if (string->type != CPP_STRING && string->type != CPP_WSTRING |
2c6e3f55 JJ |
1843 | && string->type != CPP_STRING32 && string->type != CPP_STRING16 |
1844 | && string->type != CPP_UTF8STRING) | |
4ed5bcfb NB |
1845 | return NULL; |
1846 | ||
5b9a40df TT |
1847 | paren = get_token_no_padding (pfile); |
1848 | if (paren->type == CPP_EOF) | |
1849 | _cpp_backup_tokens (pfile, 1); | |
1850 | if (paren->type != CPP_CLOSE_PAREN) | |
4ed5bcfb | 1851 | return NULL; |
a5c3cccd | 1852 | |
4ed5bcfb | 1853 | return string; |
a5c3cccd NB |
1854 | } |
1855 | ||
87062813 NB |
1856 | /* Destringize IN into a temporary buffer, by removing the first \ of |
1857 | \" and \\ sequences, and process the result as a #pragma directive. */ | |
1858 | static void | |
0afff540 | 1859 | destringize_and_run (cpp_reader *pfile, const cpp_string *in, |
620e594b | 1860 | location_t expansion_loc) |
a5c3cccd NB |
1861 | { |
1862 | const unsigned char *src, *limit; | |
87062813 | 1863 | char *dest, *result; |
bc4071dd RH |
1864 | cpp_context *saved_context; |
1865 | cpp_token *saved_cur_token; | |
1866 | tokenrun *saved_cur_run; | |
1867 | cpp_token *toks; | |
1868 | int count; | |
14ccf800 | 1869 | const struct directive *save_directive; |
a5c3cccd | 1870 | |
c3f829c1 | 1871 | dest = result = (char *) alloca (in->len - 1); |
6338b358 NB |
1872 | src = in->text + 1 + (in->text[0] == 'L'); |
1873 | limit = in->text + in->len - 1; | |
1874 | while (src < limit) | |
a5c3cccd NB |
1875 | { |
1876 | /* We know there is a character following the backslash. */ | |
1877 | if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
1878 | src++; | |
1879 | *dest++ = *src++; | |
1880 | } | |
26aea073 | 1881 | *dest = '\n'; |
a5c3cccd | 1882 | |
8128cccf NB |
1883 | /* Ugh; an awful kludge. We are really not set up to be lexing |
1884 | tokens when in the middle of a macro expansion. Use a new | |
1885 | context to force cpp_get_token to lex, and so skip_rest_of_line | |
1886 | doesn't go beyond the end of the text. Also, remember the | |
1887 | current lexing position so we can return to it later. | |
1888 | ||
1889 | Something like line-at-a-time lexing should remove the need for | |
1890 | this. */ | |
bc4071dd RH |
1891 | saved_context = pfile->context; |
1892 | saved_cur_token = pfile->cur_token; | |
1893 | saved_cur_run = pfile->cur_run; | |
79ba5e3b | 1894 | |
3ad64f53 | 1895 | pfile->context = XCNEW (cpp_context); |
79ba5e3b | 1896 | |
bc4071dd RH |
1897 | /* Inline run_directive, since we need to delay the _cpp_pop_buffer |
1898 | until we've read all of the tokens that we want. */ | |
1899 | cpp_push_buffer (pfile, (const uchar *) result, dest - result, | |
1900 | /* from_stage3 */ true); | |
1901 | /* ??? Antique Disgusting Hack. What does this do? */ | |
1902 | if (pfile->buffer->prev) | |
1903 | pfile->buffer->file = pfile->buffer->prev->file; | |
79ba5e3b | 1904 | |
bc4071dd RH |
1905 | start_directive (pfile); |
1906 | _cpp_clean_line (pfile); | |
14ccf800 TT |
1907 | save_directive = pfile->directive; |
1908 | pfile->directive = &dtable[T_PRAGMA]; | |
bc4071dd | 1909 | do_pragma (pfile); |
0078a058 TB |
1910 | if (pfile->directive_result.type == CPP_PRAGMA) |
1911 | pfile->directive_result.flags |= PRAGMA_OP; | |
bc4071dd | 1912 | end_directive (pfile, 1); |
14ccf800 | 1913 | pfile->directive = save_directive; |
79ba5e3b | 1914 | |
bc4071dd RH |
1915 | /* We always insert at least one token, the directive result. It'll |
1916 | either be a CPP_PADDING or a CPP_PRAGMA. In the later case, we | |
1917 | need to insert *all* of the tokens, including the CPP_PRAGMA_EOL. */ | |
1918 | ||
1919 | /* If we're not handling the pragma internally, read all of the tokens from | |
1920 | the string buffer now, while the string buffer is still installed. */ | |
1921 | /* ??? Note that the token buffer allocated here is leaked. It's not clear | |
1922 | to me what the true lifespan of the tokens are. It would appear that | |
1923 | the lifespan is the entire parse of the main input stream, in which case | |
1924 | this may not be wrong. */ | |
1925 | if (pfile->directive_result.type == CPP_PRAGMA) | |
1926 | { | |
1927 | int maxcount; | |
1928 | ||
1929 | count = 1; | |
1930 | maxcount = 50; | |
1931 | toks = XNEWVEC (cpp_token, maxcount); | |
1932 | toks[0] = pfile->directive_result; | |
79ba5e3b | 1933 | |
bc4071dd RH |
1934 | do |
1935 | { | |
1936 | if (count == maxcount) | |
1937 | { | |
1938 | maxcount = maxcount * 3 / 2; | |
1939 | toks = XRESIZEVEC (cpp_token, toks, maxcount); | |
1940 | } | |
1c90c6f9 | 1941 | toks[count] = *cpp_get_token (pfile); |
0afff540 DM |
1942 | /* _Pragma is a builtin, so we're not within a macro-map, and so |
1943 | the token locations are set to bogus ordinary locations | |
1944 | near to, but after that of the "_Pragma". | |
1945 | Paper over this by setting them equal to the location of the | |
1946 | _Pragma itself (PR preprocessor/69126). */ | |
1947 | toks[count].src_loc = expansion_loc; | |
1c90c6f9 JJ |
1948 | /* Macros have been already expanded by cpp_get_token |
1949 | if the pragma allowed expansion. */ | |
1950 | toks[count++].flags |= NO_EXPAND; | |
bc4071dd RH |
1951 | } |
1952 | while (toks[count-1].type != CPP_PRAGMA_EOL); | |
1953 | } | |
1954 | else | |
1955 | { | |
1956 | count = 1; | |
1957 | toks = XNEW (cpp_token); | |
1958 | toks[0] = pfile->directive_result; | |
1959 | ||
1960 | /* If we handled the entire pragma internally, make sure we get the | |
1961 | line number correct for the next token. */ | |
1962 | if (pfile->cb.line_change) | |
1963 | pfile->cb.line_change (pfile, pfile->cur_token, false); | |
1964 | } | |
1965 | ||
1966 | /* Finish inlining run_directive. */ | |
1967 | pfile->buffer->file = NULL; | |
1968 | _cpp_pop_buffer (pfile); | |
1969 | ||
1970 | /* Reset the old macro state before ... */ | |
1971 | XDELETE (pfile->context); | |
1972 | pfile->context = saved_context; | |
1973 | pfile->cur_token = saved_cur_token; | |
1974 | pfile->cur_run = saved_cur_run; | |
1975 | ||
1976 | /* ... inserting the new tokens we collected. */ | |
1977 | _cpp_push_token_context (pfile, NULL, toks, count); | |
a5c3cccd NB |
1978 | } |
1979 | ||
5b9a40df TT |
1980 | /* Handle the _Pragma operator. Return 0 on error, 1 if ok. */ |
1981 | int | |
620e594b | 1982 | _cpp_do__Pragma (cpp_reader *pfile, location_t expansion_loc) |
a5c3cccd | 1983 | { |
4ed5bcfb | 1984 | const cpp_token *string = get__Pragma_string (pfile); |
21b11495 | 1985 | pfile->directive_result.type = CPP_PADDING; |
a5c3cccd | 1986 | |
79ba5e3b | 1987 | if (string) |
5b9a40df | 1988 | { |
0afff540 | 1989 | destringize_and_run (pfile, &string->val.str, expansion_loc); |
5b9a40df TT |
1990 | return 1; |
1991 | } | |
1992 | cpp_error (pfile, CPP_DL_ERROR, | |
1993 | "_Pragma takes a parenthesized string literal"); | |
1994 | return 0; | |
a5c3cccd | 1995 | } |
21b11495 | 1996 | |
5d8ebbd8 | 1997 | /* Handle #ifdef. */ |
711b8824 | 1998 | static void |
6cf87ca4 | 1999 | do_ifdef (cpp_reader *pfile) |
168d3732 | 2000 | { |
93c80368 | 2001 | int skip = 1; |
041c3194 | 2002 | |
cef0d199 | 2003 | if (! pfile->state.skipping) |
93c80368 | 2004 | { |
93d45d9e | 2005 | cpp_hashnode *node = lex_macro_node (pfile, false); |
041c3194 | 2006 | |
93c80368 | 2007 | if (node) |
a69cbaac | 2008 | { |
ad1a3914 | 2009 | skip = !_cpp_defined_macro_p (node); |
13f93cf5 NS |
2010 | if (!_cpp_maybe_notify_macro_use (pfile, node, pfile->directive_line)) |
2011 | /* It wasn't a macro after all. */ | |
2012 | skip = true; | |
a69cbaac | 2013 | _cpp_mark_macro_used (node); |
3de8a540 AC |
2014 | if (pfile->cb.used) |
2015 | pfile->cb.used (pfile, pfile->directive_line, node); | |
a5cb563b | 2016 | check_eol (pfile, false); |
a69cbaac | 2017 | } |
93c80368 | 2018 | } |
168d3732 | 2019 | |
93c80368 NB |
2020 | push_conditional (pfile, skip, T_IFDEF, 0); |
2021 | } | |
168d3732 | 2022 | |
5d8ebbd8 | 2023 | /* Handle #ifndef. */ |
711b8824 | 2024 | static void |
6cf87ca4 | 2025 | do_ifndef (cpp_reader *pfile) |
168d3732 | 2026 | { |
93c80368 | 2027 | int skip = 1; |
93d45d9e | 2028 | cpp_hashnode *node = 0; |
168d3732 | 2029 | |
cef0d199 | 2030 | if (! pfile->state.skipping) |
5af7e2c2 | 2031 | { |
ee1c2a10 | 2032 | node = lex_macro_node (pfile, false); |
b43db0b3 GK |
2033 | |
2034 | if (node) | |
a69cbaac | 2035 | { |
ad1a3914 | 2036 | skip = _cpp_defined_macro_p (node); |
13f93cf5 NS |
2037 | if (!_cpp_maybe_notify_macro_use (pfile, node, pfile->directive_line)) |
2038 | /* It wasn't a macro after all. */ | |
2039 | skip = false; | |
a69cbaac | 2040 | _cpp_mark_macro_used (node); |
3de8a540 AC |
2041 | if (pfile->cb.used) |
2042 | pfile->cb.used (pfile, pfile->directive_line, node); | |
a5cb563b | 2043 | check_eol (pfile, false); |
a69cbaac | 2044 | } |
5af7e2c2 | 2045 | } |
041c3194 | 2046 | |
93c80368 | 2047 | push_conditional (pfile, skip, T_IFNDEF, node); |
7f2935c7 PB |
2048 | } |
2049 | ||
6d18adbc NB |
2050 | /* _cpp_parse_expr puts a macro in a "#if !defined ()" expression in |
2051 | pfile->mi_ind_cmacro so we can handle multiple-include | |
6356f892 | 2052 | optimizations. If macro expansion occurs in the expression, we |
6d18adbc NB |
2053 | cannot treat it as a controlling conditional, since the expansion |
2054 | could change in the future. That is handled by cpp_get_token. */ | |
711b8824 | 2055 | static void |
6cf87ca4 | 2056 | do_if (cpp_reader *pfile) |
7f2935c7 | 2057 | { |
93c80368 | 2058 | int skip = 1; |
7f2935c7 | 2059 | |
cef0d199 | 2060 | if (! pfile->state.skipping) |
d750887f | 2061 | skip = _cpp_parse_expr (pfile, true) == false; |
93c80368 | 2062 | |
6d18adbc | 2063 | push_conditional (pfile, skip, T_IF, pfile->mi_ind_cmacro); |
7f2935c7 PB |
2064 | } |
2065 | ||
b528a07e | 2066 | /* Flip skipping state if appropriate and continue without changing |
ea4a453b ZW |
2067 | if_stack; this is so that the error message for missing #endif's |
2068 | etc. will point to the original #if. */ | |
711b8824 | 2069 | static void |
6cf87ca4 | 2070 | do_else (cpp_reader *pfile) |
ed705a82 | 2071 | { |
b528a07e NB |
2072 | cpp_buffer *buffer = pfile->buffer; |
2073 | struct if_stack *ifs = buffer->if_stack; | |
ff2b53ef | 2074 | |
ea4a453b | 2075 | if (ifs == NULL) |
0527bc4e | 2076 | cpp_error (pfile, CPP_DL_ERROR, "#else without #if"); |
93c80368 | 2077 | else |
ff2b53ef | 2078 | { |
93c80368 NB |
2079 | if (ifs->type == T_ELSE) |
2080 | { | |
0527bc4e JDA |
2081 | cpp_error (pfile, CPP_DL_ERROR, "#else after #else"); |
2082 | cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
93c80368 NB |
2083 | "the conditional began here"); |
2084 | } | |
b528a07e NB |
2085 | ifs->type = T_ELSE; |
2086 | ||
cef0d199 NB |
2087 | /* Skip any future (erroneous) #elses or #elifs. */ |
2088 | pfile->state.skipping = ifs->skip_elses; | |
2089 | ifs->skip_elses = true; | |
7f2935c7 | 2090 | |
93c80368 NB |
2091 | /* Invalidate any controlling macro. */ |
2092 | ifs->mi_cmacro = 0; | |
93c80368 | 2093 | |
cef0d199 | 2094 | /* Only check EOL if was not originally skipping. */ |
909de5da | 2095 | if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) |
81b5d104 | 2096 | check_eol_endif_labels (pfile); |
cef0d199 | 2097 | } |
7f2935c7 PB |
2098 | } |
2099 | ||
71d38ec8 JM |
2100 | /* Handle a #elif, #elifdef or #elifndef directive by not changing if_stack |
2101 | either. See the comment above do_else. */ | |
711b8824 | 2102 | static void |
6cf87ca4 | 2103 | do_elif (cpp_reader *pfile) |
7f2935c7 | 2104 | { |
b528a07e NB |
2105 | cpp_buffer *buffer = pfile->buffer; |
2106 | struct if_stack *ifs = buffer->if_stack; | |
7f2935c7 | 2107 | |
ea4a453b | 2108 | if (ifs == NULL) |
71d38ec8 | 2109 | cpp_error (pfile, CPP_DL_ERROR, "#%s without #if", pfile->directive->name); |
b528a07e | 2110 | else |
40ea76de | 2111 | { |
b528a07e NB |
2112 | if (ifs->type == T_ELSE) |
2113 | { | |
71d38ec8 JM |
2114 | cpp_error (pfile, CPP_DL_ERROR, "#%s after #else", |
2115 | pfile->directive->name); | |
0527bc4e | 2116 | cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, |
b528a07e NB |
2117 | "the conditional began here"); |
2118 | } | |
2119 | ifs->type = T_ELIF; | |
93c80368 | 2120 | |
10ef8f28 MP |
2121 | /* See DR#412: "Only the first group whose control condition |
2122 | evaluates to true (nonzero) is processed; any following groups | |
2123 | are skipped and their controlling directives are processed as | |
2124 | if they were in a group that is skipped." */ | |
2125 | if (ifs->skip_elses) | |
f43eb770 JJ |
2126 | { |
2127 | /* In older GNU standards, #elifdef/#elifndef is supported | |
2128 | as an extension, but pedwarn if -pedantic if the presence | |
2129 | of the directive would be rejected. */ | |
2130 | if (pfile->directive != &dtable[T_ELIF] | |
2131 | && ! CPP_OPTION (pfile, elifdef) | |
2132 | && CPP_PEDANTIC (pfile) | |
2133 | && !pfile->state.skipping) | |
2134 | { | |
2135 | if (CPP_OPTION (pfile, cplusplus)) | |
2136 | cpp_error (pfile, CPP_DL_PEDWARN, | |
2137 | "#%s before C++23 is a GCC extension", | |
2138 | pfile->directive->name); | |
2139 | else | |
2140 | cpp_error (pfile, CPP_DL_PEDWARN, | |
2141 | "#%s before C2X is a GCC extension", | |
2142 | pfile->directive->name); | |
2143 | } | |
2144 | pfile->state.skipping = 1; | |
2145 | } | |
10ef8f28 | 2146 | else |
b528a07e | 2147 | { |
71d38ec8 JM |
2148 | if (pfile->directive == &dtable[T_ELIF]) |
2149 | pfile->state.skipping = !_cpp_parse_expr (pfile, false); | |
2150 | else | |
2151 | { | |
2152 | cpp_hashnode *node = lex_macro_node (pfile, false); | |
2153 | ||
2154 | if (node) | |
2155 | { | |
2156 | bool macro_defined = _cpp_defined_macro_p (node); | |
2157 | if (!_cpp_maybe_notify_macro_use (pfile, node, | |
2158 | pfile->directive_line)) | |
2159 | /* It wasn't a macro after all. */ | |
2160 | macro_defined = false; | |
2161 | bool skip = (pfile->directive == &dtable[T_ELIFDEF] | |
2162 | ? !macro_defined | |
2163 | : macro_defined); | |
2164 | if (pfile->cb.used) | |
2165 | pfile->cb.used (pfile, pfile->directive_line, node); | |
2166 | check_eol (pfile, false); | |
f43eb770 JJ |
2167 | /* In older GNU standards, #elifdef/#elifndef is supported |
2168 | as an extension, but pedwarn if -pedantic if the presence | |
2169 | of the directive would change behavior. */ | |
2170 | if (! CPP_OPTION (pfile, elifdef) | |
2171 | && CPP_PEDANTIC (pfile) | |
2172 | && pfile->state.skipping != skip) | |
2173 | { | |
2174 | if (CPP_OPTION (pfile, cplusplus)) | |
2175 | cpp_error (pfile, CPP_DL_PEDWARN, | |
2176 | "#%s before C++23 is a GCC extension", | |
2177 | pfile->directive->name); | |
2178 | else | |
2179 | cpp_error (pfile, CPP_DL_PEDWARN, | |
2180 | "#%s before C2X is a GCC extension", | |
2181 | pfile->directive->name); | |
2182 | } | |
71d38ec8 JM |
2183 | pfile->state.skipping = skip; |
2184 | } | |
2185 | } | |
2186 | ifs->skip_elses = !pfile->state.skipping; | |
b528a07e | 2187 | } |
cef0d199 NB |
2188 | |
2189 | /* Invalidate any controlling macro. */ | |
2190 | ifs->mi_cmacro = 0; | |
40ea76de | 2191 | } |
7f2935c7 PB |
2192 | } |
2193 | ||
71d38ec8 JM |
2194 | /* Handle a #elifdef directive. */ |
2195 | static void | |
2196 | do_elifdef (cpp_reader *pfile) | |
2197 | { | |
2198 | do_elif (pfile); | |
2199 | } | |
2200 | ||
2201 | /* Handle a #elifndef directive. */ | |
2202 | static void | |
2203 | do_elifndef (cpp_reader *pfile) | |
2204 | { | |
2205 | do_elif (pfile); | |
2206 | } | |
2207 | ||
cef0d199 | 2208 | /* #endif pops the if stack and resets pfile->state.skipping. */ |
711b8824 | 2209 | static void |
6cf87ca4 | 2210 | do_endif (cpp_reader *pfile) |
7f2935c7 | 2211 | { |
b528a07e NB |
2212 | cpp_buffer *buffer = pfile->buffer; |
2213 | struct if_stack *ifs = buffer->if_stack; | |
ea4a453b | 2214 | |
ea4a453b | 2215 | if (ifs == NULL) |
0527bc4e | 2216 | cpp_error (pfile, CPP_DL_ERROR, "#endif without #if"); |
7f2935c7 PB |
2217 | else |
2218 | { | |
cef0d199 | 2219 | /* Only check EOL if was not originally skipping. */ |
909de5da | 2220 | if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) |
81b5d104 | 2221 | check_eol_endif_labels (pfile); |
cef0d199 | 2222 | |
93c80368 NB |
2223 | /* If potential control macro, we go back outside again. */ |
2224 | if (ifs->next == 0 && ifs->mi_cmacro) | |
2225 | { | |
6d18adbc | 2226 | pfile->mi_valid = true; |
93c80368 NB |
2227 | pfile->mi_cmacro = ifs->mi_cmacro; |
2228 | } | |
2229 | ||
b528a07e | 2230 | buffer->if_stack = ifs->next; |
cef0d199 | 2231 | pfile->state.skipping = ifs->was_skipping; |
2a967f3d | 2232 | obstack_free (&pfile->buffer_ob, ifs); |
7f2935c7 | 2233 | } |
93c80368 | 2234 | } |
041c3194 | 2235 | |
5d8ebbd8 NB |
2236 | /* Push an if_stack entry for a preprocessor conditional, and set |
2237 | pfile->state.skipping to SKIP. If TYPE indicates the conditional | |
2238 | is #if or #ifndef, CMACRO is a potentially controlling macro, and | |
2239 | we need to check here that we are at the top of the file. */ | |
ea4a453b | 2240 | static void |
6cf87ca4 ZW |
2241 | push_conditional (cpp_reader *pfile, int skip, int type, |
2242 | const cpp_hashnode *cmacro) | |
ea4a453b ZW |
2243 | { |
2244 | struct if_stack *ifs; | |
b528a07e | 2245 | cpp_buffer *buffer = pfile->buffer; |
ea4a453b | 2246 | |
72bb2c39 | 2247 | ifs = XOBNEW (&pfile->buffer_ob, struct if_stack); |
50410426 | 2248 | ifs->line = pfile->directive_line; |
b528a07e | 2249 | ifs->next = buffer->if_stack; |
cef0d199 NB |
2250 | ifs->skip_elses = pfile->state.skipping || !skip; |
2251 | ifs->was_skipping = pfile->state.skipping; | |
ea4a453b | 2252 | ifs->type = type; |
6d18adbc NB |
2253 | /* This condition is effectively a test for top-of-file. */ |
2254 | if (pfile->mi_valid && pfile->mi_cmacro == 0) | |
93c80368 NB |
2255 | ifs->mi_cmacro = cmacro; |
2256 | else | |
2257 | ifs->mi_cmacro = 0; | |
ea4a453b | 2258 | |
cef0d199 | 2259 | pfile->state.skipping = skip; |
b528a07e | 2260 | buffer->if_stack = ifs; |
782331f4 | 2261 | } |
7061aa5a | 2262 | |
5d8ebbd8 NB |
2263 | /* Read the tokens of the answer into the macro pool, in a directive |
2264 | of type TYPE. Only commit the memory if we intend it as permanent | |
2265 | storage, i.e. the #assert case. Returns 0 on success, and sets | |
a28fbdba MLI |
2266 | ANSWERP to point to the answer. PRED_LOC is the location of the |
2267 | predicate. */ | |
3fb558b1 | 2268 | static bool |
620e594b | 2269 | parse_answer (cpp_reader *pfile, int type, location_t pred_loc, |
3fb558b1 | 2270 | cpp_macro **answer_ptr) |
7f2935c7 | 2271 | { |
93c80368 NB |
2272 | /* In a conditional, it is legal to not have an open paren. We |
2273 | should save the following token in this case. */ | |
3fb558b1 | 2274 | const cpp_token *paren = cpp_get_token (pfile); |
93c80368 NB |
2275 | |
2276 | /* If not a paren, see if we're OK. */ | |
4ed5bcfb | 2277 | if (paren->type != CPP_OPEN_PAREN) |
041c3194 | 2278 | { |
93c80368 NB |
2279 | /* In a conditional no answer is a test for any answer. It |
2280 | could be followed by any token. */ | |
2281 | if (type == T_IF) | |
bdcbe496 NB |
2282 | { |
2283 | _cpp_backup_tokens (pfile, 1); | |
3fb558b1 | 2284 | return true; |
bdcbe496 | 2285 | } |
93c80368 NB |
2286 | |
2287 | /* #unassert with no answer is valid - it removes all answers. */ | |
4ed5bcfb | 2288 | if (type == T_UNASSERT && paren->type == CPP_EOF) |
3fb558b1 | 2289 | return true; |
15dad1d9 | 2290 | |
a28fbdba MLI |
2291 | cpp_error_with_line (pfile, CPP_DL_ERROR, pred_loc, 0, |
2292 | "missing '(' after predicate"); | |
3fb558b1 | 2293 | return false; |
041c3194 | 2294 | } |
7061aa5a | 2295 | |
3fb558b1 NS |
2296 | cpp_macro *answer = _cpp_new_macro (pfile, cmk_assert, |
2297 | _cpp_reserve_room (pfile, 0, | |
2298 | sizeof (cpp_macro))); | |
2299 | answer->parm.next = NULL; | |
2300 | unsigned count = 0; | |
2301 | for (;;) | |
041c3194 | 2302 | { |
8c3b2693 | 2303 | const cpp_token *token = cpp_get_token (pfile); |
93c80368 | 2304 | |
041c3194 ZW |
2305 | if (token->type == CPP_CLOSE_PAREN) |
2306 | break; | |
a7abcbbf | 2307 | |
93c80368 | 2308 | if (token->type == CPP_EOF) |
041c3194 | 2309 | { |
0527bc4e | 2310 | cpp_error (pfile, CPP_DL_ERROR, "missing ')' to complete answer"); |
3fb558b1 | 2311 | return false; |
041c3194 | 2312 | } |
8c3b2693 | 2313 | |
3fb558b1 NS |
2314 | answer = (cpp_macro *)_cpp_reserve_room |
2315 | (pfile, sizeof (cpp_macro) + count * sizeof (cpp_token), | |
2316 | sizeof (cpp_token)); | |
2317 | answer->exp.tokens[count++] = *token; | |
041c3194 | 2318 | } |
15dad1d9 | 2319 | |
3fb558b1 | 2320 | if (!count) |
7061aa5a | 2321 | { |
0527bc4e | 2322 | cpp_error (pfile, CPP_DL_ERROR, "predicate's answer is empty"); |
3fb558b1 | 2323 | return false; |
7f2935c7 | 2324 | } |
041c3194 | 2325 | |
3fb558b1 NS |
2326 | /* Drop whitespace at start, for answer equivalence purposes. */ |
2327 | answer->exp.tokens[0].flags &= ~PREV_WHITE; | |
041c3194 | 2328 | |
3fb558b1 NS |
2329 | answer->count = count; |
2330 | *answer_ptr = answer; | |
2331 | ||
2332 | return true; | |
93c80368 | 2333 | } |
041c3194 | 2334 | |
5d8ebbd8 | 2335 | /* Parses an assertion directive of type TYPE, returning a pointer to |
a570d97f NS |
2336 | the hash node of the predicate, or 0 on error. The node is |
2337 | guaranteed to be disjoint from the macro namespace, so can only | |
2338 | have type 'NT_VOID'. If an answer was supplied, it is placed in | |
2339 | *ANSWER_PTR, which is otherwise set to 0. */ | |
93c80368 | 2340 | static cpp_hashnode * |
3fb558b1 | 2341 | parse_assertion (cpp_reader *pfile, int type, cpp_macro **answer_ptr) |
93c80368 NB |
2342 | { |
2343 | cpp_hashnode *result = 0; | |
93c80368 NB |
2344 | |
2345 | /* We don't expand predicates or answers. */ | |
2346 | pfile->state.prevent_expansion++; | |
2347 | ||
3fb558b1 NS |
2348 | *answer_ptr = NULL; |
2349 | ||
2350 | const cpp_token *predicate = cpp_get_token (pfile); | |
4ed5bcfb | 2351 | if (predicate->type == CPP_EOF) |
0527bc4e | 2352 | cpp_error (pfile, CPP_DL_ERROR, "assertion without predicate"); |
4ed5bcfb | 2353 | else if (predicate->type != CPP_NAME) |
a28fbdba MLI |
2354 | cpp_error_with_line (pfile, CPP_DL_ERROR, predicate->src_loc, 0, |
2355 | "predicate must be an identifier"); | |
3fb558b1 | 2356 | else if (parse_answer (pfile, type, predicate->src_loc, answer_ptr)) |
93c80368 | 2357 | { |
9a0c6187 | 2358 | unsigned int len = NODE_LEN (predicate->val.node.node); |
c3f829c1 | 2359 | unsigned char *sym = (unsigned char *) alloca (len + 1); |
041c3194 | 2360 | |
93c80368 NB |
2361 | /* Prefix '#' to get it out of macro namespace. */ |
2362 | sym[0] = '#'; | |
9a0c6187 | 2363 | memcpy (sym + 1, NODE_NAME (predicate->val.node.node), len); |
93c80368 NB |
2364 | result = cpp_lookup (pfile, sym, len + 1); |
2365 | } | |
7061aa5a | 2366 | |
93c80368 | 2367 | pfile->state.prevent_expansion--; |
3fb558b1 | 2368 | |
93c80368 | 2369 | return result; |
7f2935c7 | 2370 | } |
7061aa5a | 2371 | |
5d8ebbd8 | 2372 | /* Returns a pointer to the pointer to CANDIDATE in the answer chain, |
041c3194 | 2373 | or a pointer to NULL if the answer is not in the chain. */ |
3fb558b1 NS |
2374 | static cpp_macro ** |
2375 | find_answer (cpp_hashnode *node, const cpp_macro *candidate) | |
7f2935c7 | 2376 | { |
93c80368 | 2377 | unsigned int i; |
3fb558b1 | 2378 | cpp_macro **result = NULL; |
7f2935c7 | 2379 | |
3fb558b1 | 2380 | for (result = &node->value.answers; *result; result = &(*result)->parm.next) |
93c80368 | 2381 | { |
3fb558b1 | 2382 | cpp_macro *answer = *result; |
93c80368 NB |
2383 | |
2384 | if (answer->count == candidate->count) | |
2385 | { | |
2386 | for (i = 0; i < answer->count; i++) | |
3fb558b1 NS |
2387 | if (!_cpp_equiv_tokens (&answer->exp.tokens[i], |
2388 | &candidate->exp.tokens[i])) | |
93c80368 NB |
2389 | break; |
2390 | ||
2391 | if (i == answer->count) | |
2392 | break; | |
2393 | } | |
2394 | } | |
ff2b53ef | 2395 | |
041c3194 ZW |
2396 | return result; |
2397 | } | |
15dad1d9 | 2398 | |
93c80368 | 2399 | /* Test an assertion within a preprocessor conditional. Returns |
da7d8304 | 2400 | nonzero on failure, zero on success. On success, the result of |
2402645b | 2401 | the test is written into VALUE, otherwise the value 0. */ |
93c80368 | 2402 | int |
6cf87ca4 | 2403 | _cpp_test_assertion (cpp_reader *pfile, unsigned int *value) |
93c80368 | 2404 | { |
3fb558b1 NS |
2405 | cpp_macro *answer; |
2406 | cpp_hashnode *node = parse_assertion (pfile, T_IF, &answer); | |
2402645b HPN |
2407 | |
2408 | /* For recovery, an erroneous assertion expression is handled as a | |
2409 | failing assertion. */ | |
2410 | *value = 0; | |
2411 | ||
93c80368 | 2412 | if (node) |
3fb558b1 | 2413 | { |
a570d97f | 2414 | if (node->value.answers) |
3fb558b1 NS |
2415 | *value = !answer || *find_answer (node, answer); |
2416 | } | |
91318908 NB |
2417 | else if (pfile->cur_token[-1].type == CPP_EOF) |
2418 | _cpp_backup_tokens (pfile, 1); | |
93c80368 NB |
2419 | |
2420 | /* We don't commit the memory for the answer - it's temporary only. */ | |
2421 | return node == 0; | |
2422 | } | |
2423 | ||
5d8ebbd8 | 2424 | /* Handle #assert. */ |
711b8824 | 2425 | static void |
6cf87ca4 | 2426 | do_assert (cpp_reader *pfile) |
041c3194 | 2427 | { |
3fb558b1 NS |
2428 | cpp_macro *answer; |
2429 | cpp_hashnode *node = parse_assertion (pfile, T_ASSERT, &answer); | |
df383483 | 2430 | |
041c3194 | 2431 | if (node) |
ff2b53ef | 2432 | { |
93c80368 NB |
2433 | /* Place the new answer in the answer list. First check there |
2434 | is not a duplicate. */ | |
a570d97f | 2435 | if (*find_answer (node, answer)) |
041c3194 | 2436 | { |
3fb558b1 NS |
2437 | cpp_error (pfile, CPP_DL_WARNING, "\"%s\" re-asserted", |
2438 | NODE_NAME (node) + 1); | |
2439 | return; | |
041c3194 | 2440 | } |
8c3b2693 | 2441 | |
3fb558b1 NS |
2442 | /* Commit or allocate storage for the answer. */ |
2443 | answer = (cpp_macro *)_cpp_commit_buff | |
2444 | (pfile, sizeof (cpp_macro) - sizeof (cpp_token) | |
2445 | + sizeof (cpp_token) * answer->count); | |
2446 | ||
a570d97f NS |
2447 | /* Chain into the list. */ |
2448 | answer->parm.next = node->value.answers; | |
3fb558b1 NS |
2449 | node->value.answers = answer; |
2450 | ||
a5cb563b | 2451 | check_eol (pfile, false); |
ff2b53ef | 2452 | } |
041c3194 | 2453 | } |
15dad1d9 | 2454 | |
5d8ebbd8 | 2455 | /* Handle #unassert. */ |
711b8824 | 2456 | static void |
6cf87ca4 | 2457 | do_unassert (cpp_reader *pfile) |
041c3194 | 2458 | { |
3fb558b1 NS |
2459 | cpp_macro *answer; |
2460 | cpp_hashnode *node = parse_assertion (pfile, T_UNASSERT, &answer); | |
df383483 | 2461 | |
93c80368 | 2462 | /* It isn't an error to #unassert something that isn't asserted. */ |
a570d97f | 2463 | if (node) |
7061aa5a | 2464 | { |
93c80368 | 2465 | if (answer) |
15dad1d9 | 2466 | { |
3fb558b1 | 2467 | cpp_macro **p = find_answer (node, answer); |
a7abcbbf | 2468 | |
3fb558b1 NS |
2469 | /* Remove the assert from the list. */ |
2470 | if (cpp_macro *temp = *p) | |
a570d97f | 2471 | *p = temp->parm.next; |
8c3b2693 | 2472 | |
a5cb563b | 2473 | check_eol (pfile, false); |
93c80368 NB |
2474 | } |
2475 | else | |
2476 | _cpp_free_definition (node); | |
041c3194 | 2477 | } |
93c80368 NB |
2478 | |
2479 | /* We don't commit the memory for the answer - it's temporary only. */ | |
7f2935c7 | 2480 | } |
7f2935c7 | 2481 | |
45b966db ZW |
2482 | /* These are for -D, -U, -A. */ |
2483 | ||
2484 | /* Process the string STR as if it appeared as the body of a #define. | |
2485 | If STR is just an identifier, define it with value 1. | |
2486 | If STR has anything after the identifier, then it should | |
ec5c56db | 2487 | be identifier=definition. */ |
0b22d65c | 2488 | void |
6cf87ca4 | 2489 | cpp_define (cpp_reader *pfile, const char *str) |
0b22d65c | 2490 | { |
86373e7e JM |
2491 | char *buf; |
2492 | const char *p; | |
45b966db ZW |
2493 | size_t count; |
2494 | ||
df383483 | 2495 | /* Copy the entire option so we can modify it. |
45b966db | 2496 | Change the first "=" in the string to a space. If there is none, |
86368122 NB |
2497 | tack " 1" on the end. */ |
2498 | ||
86368122 | 2499 | count = strlen (str); |
c3f829c1 | 2500 | buf = (char *) alloca (count + 3); |
86368122 NB |
2501 | memcpy (buf, str, count); |
2502 | ||
2503 | p = strchr (str, '='); | |
45b966db | 2504 | if (p) |
86368122 | 2505 | buf[p - str] = ' '; |
45b966db ZW |
2506 | else |
2507 | { | |
86368122 NB |
2508 | buf[count++] = ' '; |
2509 | buf[count++] = '1'; | |
0b22d65c | 2510 | } |
26aea073 | 2511 | buf[count] = '\n'; |
cf4ed945 | 2512 | |
29401c30 | 2513 | run_directive (pfile, T_DEFINE, buf, count); |
2c8f0515 ZW |
2514 | } |
2515 | ||
6f1ae1ec PD |
2516 | /* Like cpp_define, but does not warn about unused macro. */ |
2517 | void | |
2518 | cpp_define_unused (cpp_reader *pfile, const char *str) | |
2519 | { | |
2520 | unsigned char warn_unused_macros = CPP_OPTION (pfile, warn_unused_macros); | |
2521 | CPP_OPTION (pfile, warn_unused_macros) = 0; | |
2522 | cpp_define (pfile, str); | |
2523 | CPP_OPTION (pfile, warn_unused_macros) = warn_unused_macros; | |
2524 | } | |
28f68625 DF |
2525 | |
2526 | /* Use to build macros to be run through cpp_define() as | |
2527 | described above. | |
2528 | Example: cpp_define_formatted (pfile, "MACRO=%d", value); */ | |
2529 | ||
2530 | void | |
2531 | cpp_define_formatted (cpp_reader *pfile, const char *fmt, ...) | |
2532 | { | |
01ca36af | 2533 | char *ptr; |
28f68625 DF |
2534 | |
2535 | va_list ap; | |
2536 | va_start (ap, fmt); | |
01ca36af | 2537 | ptr = xvasprintf (fmt, ap); |
28f68625 DF |
2538 | va_end (ap); |
2539 | ||
2540 | cpp_define (pfile, ptr); | |
2541 | free (ptr); | |
2542 | } | |
2543 | ||
6f1ae1ec PD |
2544 | /* Like cpp_define_formatted, but does not warn about unused macro. */ |
2545 | void | |
2546 | cpp_define_formatted_unused (cpp_reader *pfile, const char *fmt, ...) | |
2547 | { | |
2548 | char *ptr; | |
2549 | ||
2550 | va_list ap; | |
2551 | va_start (ap, fmt); | |
2552 | ptr = xvasprintf (fmt, ap); | |
2553 | va_end (ap); | |
2554 | ||
2555 | cpp_define_unused (pfile, ptr); | |
2556 | free (ptr); | |
2557 | } | |
28f68625 | 2558 | |
ad2a084d | 2559 | /* Slight variant of the above for use by initialize_builtins. */ |
2c8f0515 | 2560 | void |
6cf87ca4 | 2561 | _cpp_define_builtin (cpp_reader *pfile, const char *str) |
2c8f0515 | 2562 | { |
26aea073 | 2563 | size_t len = strlen (str); |
c3f829c1 | 2564 | char *buf = (char *) alloca (len + 1); |
26aea073 NB |
2565 | memcpy (buf, str, len); |
2566 | buf[len] = '\n'; | |
2567 | run_directive (pfile, T_DEFINE, buf, len); | |
45b966db | 2568 | } |
0f41302f | 2569 | |
45b966db ZW |
2570 | /* Process MACRO as if it appeared as the body of an #undef. */ |
2571 | void | |
6cf87ca4 | 2572 | cpp_undef (cpp_reader *pfile, const char *macro) |
7f2935c7 | 2573 | { |
26aea073 | 2574 | size_t len = strlen (macro); |
c3f829c1 | 2575 | char *buf = (char *) alloca (len + 1); |
26aea073 NB |
2576 | memcpy (buf, macro, len); |
2577 | buf[len] = '\n'; | |
2578 | run_directive (pfile, T_UNDEF, buf, len); | |
7f2935c7 PB |
2579 | } |
2580 | ||
d6874138 KT |
2581 | /* Replace a previous definition DEF of the macro STR. If DEF is NULL, |
2582 | or first element is zero, then the macro should be undefined. */ | |
2583 | static void | |
2584 | cpp_pop_definition (cpp_reader *pfile, struct def_pragma_macro *c) | |
121de39f | 2585 | { |
d6874138 | 2586 | cpp_hashnode *node = _cpp_lex_identifier (pfile, c->name); |
121de39f RH |
2587 | if (node == NULL) |
2588 | return; | |
2589 | ||
93d45d9e JM |
2590 | if (pfile->cb.before_define) |
2591 | pfile->cb.before_define (pfile); | |
2592 | ||
3f6677f4 | 2593 | if (cpp_macro_p (node)) |
121de39f RH |
2594 | { |
2595 | if (pfile->cb.undef) | |
2596 | pfile->cb.undef (pfile, pfile->directive_line, node); | |
2597 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
2598 | _cpp_warn_if_unused_macro (pfile, node, NULL); | |
3f6677f4 | 2599 | _cpp_free_definition (node); |
121de39f | 2600 | } |
121de39f | 2601 | |
d6874138 KT |
2602 | if (c->is_undef) |
2603 | return; | |
aa23e73b JJ |
2604 | if (c->is_builtin) |
2605 | { | |
2606 | _cpp_restore_special_builtin (pfile, c); | |
2607 | return; | |
2608 | } | |
3f6677f4 | 2609 | |
d6874138 KT |
2610 | { |
2611 | size_t namelen; | |
2612 | const uchar *dn; | |
2613 | cpp_hashnode *h = NULL; | |
2614 | cpp_buffer *nbuf; | |
2615 | ||
2616 | namelen = ustrcspn (c->definition, "( \n"); | |
2617 | h = cpp_lookup (pfile, c->definition, namelen); | |
2618 | dn = c->definition + namelen; | |
2619 | ||
d6874138 KT |
2620 | nbuf = cpp_push_buffer (pfile, dn, ustrchr (dn, '\n') - dn, true); |
2621 | if (nbuf != NULL) | |
2622 | { | |
2623 | _cpp_clean_line (pfile); | |
2624 | nbuf->sysp = 1; | |
2625 | if (!_cpp_create_definition (pfile, h)) | |
2626 | abort (); | |
2627 | _cpp_pop_buffer (pfile); | |
2628 | } | |
2629 | else | |
2630 | abort (); | |
2631 | h->value.macro->line = c->line; | |
2632 | h->value.macro->syshdr = c->syshdr; | |
2633 | h->value.macro->used = c->used; | |
2634 | } | |
121de39f RH |
2635 | } |
2636 | ||
ec5c56db | 2637 | /* Process the string STR as if it appeared as the body of a #assert. */ |
45b966db | 2638 | void |
6cf87ca4 | 2639 | cpp_assert (cpp_reader *pfile, const char *str) |
45b966db | 2640 | { |
86368122 | 2641 | handle_assertion (pfile, str, T_ASSERT); |
45b966db | 2642 | } |
7f2935c7 | 2643 | |
ec5c56db | 2644 | /* Process STR as if it appeared as the body of an #unassert. */ |
45b966db | 2645 | void |
6cf87ca4 | 2646 | cpp_unassert (cpp_reader *pfile, const char *str) |
7f2935c7 | 2647 | { |
86368122 | 2648 | handle_assertion (pfile, str, T_UNASSERT); |
df383483 | 2649 | } |
3fdc651f | 2650 | |
86368122 NB |
2651 | /* Common code for cpp_assert (-A) and cpp_unassert (-A-). */ |
2652 | static void | |
6cf87ca4 | 2653 | handle_assertion (cpp_reader *pfile, const char *str, int type) |
86368122 NB |
2654 | { |
2655 | size_t count = strlen (str); | |
2656 | const char *p = strchr (str, '='); | |
2657 | ||
26aea073 NB |
2658 | /* Copy the entire option so we can modify it. Change the first |
2659 | "=" in the string to a '(', and tack a ')' on the end. */ | |
c3f829c1 | 2660 | char *buf = (char *) alloca (count + 2); |
26aea073 NB |
2661 | |
2662 | memcpy (buf, str, count); | |
86368122 NB |
2663 | if (p) |
2664 | { | |
86368122 NB |
2665 | buf[p - str] = '('; |
2666 | buf[count++] = ')'; | |
86368122 | 2667 | } |
26aea073 NB |
2668 | buf[count] = '\n'; |
2669 | str = buf; | |
86368122 | 2670 | |
29401c30 | 2671 | run_directive (pfile, type, str, count); |
86368122 NB |
2672 | } |
2673 | ||
7e96d768 NB |
2674 | /* The options structure. */ |
2675 | cpp_options * | |
6cf87ca4 | 2676 | cpp_get_options (cpp_reader *pfile) |
7e96d768 NB |
2677 | { |
2678 | return &pfile->opts; | |
2679 | } | |
2680 | ||
2681 | /* The callbacks structure. */ | |
2682 | cpp_callbacks * | |
6cf87ca4 | 2683 | cpp_get_callbacks (cpp_reader *pfile) |
7e96d768 NB |
2684 | { |
2685 | return &pfile->cb; | |
2686 | } | |
2687 | ||
2688 | /* Copy the given callbacks structure to our own. */ | |
2689 | void | |
6cf87ca4 | 2690 | cpp_set_callbacks (cpp_reader *pfile, cpp_callbacks *cb) |
7e96d768 NB |
2691 | { |
2692 | pfile->cb = *cb; | |
2693 | } | |
2694 | ||
eccec868 JM |
2695 | /* The narrow character set identifier. */ |
2696 | const char * | |
2697 | cpp_get_narrow_charset_name (cpp_reader *pfile) | |
2698 | { | |
2699 | return pfile->narrow_cset_desc.to; | |
2700 | } | |
2701 | ||
2702 | /* The wide character set identifier. */ | |
2703 | const char * | |
2704 | cpp_get_wide_charset_name (cpp_reader *pfile) | |
2705 | { | |
2706 | return pfile->wide_cset_desc.to; | |
2707 | } | |
2708 | ||
c6e83800 | 2709 | /* The dependencies structure. (Creates one if it hasn't already been.) */ |
99b1c316 | 2710 | class mkdeps * |
c6e83800 ZW |
2711 | cpp_get_deps (cpp_reader *pfile) |
2712 | { | |
918e8b10 | 2713 | if (!pfile->deps && CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
c6e83800 ZW |
2714 | pfile->deps = deps_init (); |
2715 | return pfile->deps; | |
2716 | } | |
2717 | ||
eb1f4d9d NB |
2718 | /* Push a new buffer on the buffer stack. Returns the new buffer; it |
2719 | doesn't fail. It does not generate a file change call back; that | |
2720 | is the responsibility of the caller. */ | |
c71f835b | 2721 | cpp_buffer * |
6cf87ca4 | 2722 | cpp_push_buffer (cpp_reader *pfile, const uchar *buffer, size_t len, |
40de9f76 | 2723 | int from_stage3) |
c71f835b | 2724 | { |
c3f829c1 | 2725 | cpp_buffer *new_buffer = XOBNEW (&pfile->buffer_ob, cpp_buffer); |
93c80368 | 2726 | |
fde84349 | 2727 | /* Clears, amongst other things, if_stack and mi_cmacro. */ |
c3f829c1 | 2728 | memset (new_buffer, 0, sizeof (cpp_buffer)); |
fde84349 | 2729 | |
c3f829c1 GDR |
2730 | new_buffer->next_line = new_buffer->buf = buffer; |
2731 | new_buffer->rlimit = buffer + len; | |
2732 | new_buffer->from_stage3 = from_stage3; | |
2733 | new_buffer->prev = pfile->buffer; | |
2734 | new_buffer->need_line = true; | |
0bda4760 | 2735 | |
c3f829c1 | 2736 | pfile->buffer = new_buffer; |
cf551fba | 2737 | |
c3f829c1 | 2738 | return new_buffer; |
c71f835b ZW |
2739 | } |
2740 | ||
af0d16cd NB |
2741 | /* Pops a single buffer, with a file change call-back if appropriate. |
2742 | Then pushes the next -include file, if any remain. */ | |
ef6e958a | 2743 | void |
6cf87ca4 | 2744 | _cpp_pop_buffer (cpp_reader *pfile) |
c71f835b | 2745 | { |
fde84349 | 2746 | cpp_buffer *buffer = pfile->buffer; |
8f9b4009 | 2747 | struct _cpp_file *inc = buffer->file; |
ad2a084d | 2748 | struct if_stack *ifs; |
28937f11 | 2749 | const unsigned char *to_free; |
c71f835b | 2750 | |
fde84349 NB |
2751 | /* Walk back up the conditional stack till we reach its level at |
2752 | entry to this file, issuing error messages. */ | |
2753 | for (ifs = buffer->if_stack; ifs; ifs = ifs->next) | |
0527bc4e | 2754 | cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, |
fde84349 | 2755 | "unterminated #%s", dtable[ifs->type].name); |
eb1f4d9d | 2756 | |
97293897 | 2757 | /* In case of a missing #endif. */ |
67821e3a | 2758 | pfile->state.skipping = 0; |
29401c30 | 2759 | |
af0d16cd | 2760 | /* _cpp_do_file_change expects pfile->buffer to be the new one. */ |
29401c30 NB |
2761 | pfile->buffer = buffer->prev; |
2762 | ||
28937f11 | 2763 | to_free = buffer->to_free; |
26aea073 NB |
2764 | free (buffer->notes); |
2765 | ||
af0d16cd NB |
2766 | /* Free the buffer object now; we may want to push a new buffer |
2767 | in _cpp_push_next_include_file. */ | |
2768 | obstack_free (&pfile->buffer_ob, buffer); | |
29401c30 | 2769 | |
af0d16cd NB |
2770 | if (inc) |
2771 | { | |
28937f11 | 2772 | _cpp_pop_file_buffer (pfile, inc, to_free); |
af0d16cd | 2773 | |
40de9f76 | 2774 | _cpp_do_file_change (pfile, LC_LEAVE, 0, 0, 0); |
af0d16cd | 2775 | } |
705b0c05 NS |
2776 | else if (to_free) |
2777 | free ((void *)to_free); | |
c71f835b ZW |
2778 | } |
2779 | ||
05713b80 | 2780 | /* Enter all recognized directives in the hash table. */ |
c71f835b | 2781 | void |
6cf87ca4 | 2782 | _cpp_init_directives (cpp_reader *pfile) |
c71f835b | 2783 | { |
ad1a3914 | 2784 | for (int i = 0; i < N_DIRECTIVES; i++) |
93c80368 | 2785 | { |
ad1a3914 | 2786 | cpp_hashnode *node = cpp_lookup (pfile, dtable[i].name, dtable[i].length); |
4977bab6 ZW |
2787 | node->is_directive = 1; |
2788 | node->directive_index = i; | |
93c80368 | 2789 | } |
c71f835b | 2790 | } |
a15f7cb8 ESR |
2791 | |
2792 | /* Extract header file from a bracket include. Parsing starts after '<'. | |
2793 | The string is malloced and must be freed by the caller. */ | |
2794 | char * | |
2795 | _cpp_bracket_include(cpp_reader *pfile) | |
2796 | { | |
2797 | return glue_header_name (pfile); | |
2798 | } | |
2799 |