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e14c5993 | 1 | /* CPP Library. (Directive handling.) |
d353bf18 | 2 | Copyright (C) 1986-2015 Free Software Foundation, Inc. |
1f99c786 | 3 | Contributed by Per Bothner, 1994-95. |
0cb8d9ae | 4 | Based on CCCP program by Paul Rubin, June 1986 |
1d6fa33f | 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 | |
6bc9506f | 9 | Free Software Foundation; either version 3, or (at your option) any |
1d6fa33f | 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 | |
6bc9506f | 18 | along with this program; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
1d6fa33f | 20 | |
ad87de1e | 21 | #include "config.h" |
1486870d | 22 | #include "system.h" |
ad87de1e | 23 | #include "cpplib.h" |
d856c8a6 | 24 | #include "internal.h" |
3eb3f293 | 25 | #include "mkdeps.h" |
f51c2148 | 26 | #include "obstack.h" |
1d6fa33f | 27 | |
1e8b9746 | 28 | /* Stack of conditionals currently in progress |
29 | (including both successful and failing conditionals). */ | |
1e8b9746 | 30 | struct if_stack |
31 | { | |
32 | struct if_stack *next; | |
c219ee5c | 33 | source_location line; /* Line where condition started. */ |
79bd622b | 34 | const cpp_hashnode *mi_cmacro;/* macro name for #ifndef around entire file */ |
5e878517 | 35 | bool skip_elses; /* Can future #else / #elif be skipped? */ |
36 | bool was_skipping; /* If were skipping on entry. */ | |
f7fdd7a1 | 37 | int type; /* Most recent conditional for diagnostics. */ |
1e8b9746 | 38 | }; |
1e8b9746 | 39 | |
c6f14ce5 | 40 | /* Contains a registered pragma or pragma namespace. */ |
f7fdd7a1 | 41 | typedef void (*pragma_cb) (cpp_reader *); |
c6f14ce5 | 42 | struct pragma_entry |
43 | { | |
44 | struct pragma_entry *next; | |
5c43d212 | 45 | const cpp_hashnode *pragma; /* Name and length. */ |
d6d3c909 | 46 | bool is_nspace; |
47 | bool is_internal; | |
b75b98aa | 48 | bool is_deferred; |
49 | bool allow_expansion; | |
c6f14ce5 | 50 | union { |
51 | pragma_cb handler; | |
52 | struct pragma_entry *space; | |
b75b98aa | 53 | unsigned int ident; |
c6f14ce5 | 54 | } u; |
55 | }; | |
56 | ||
79bd622b | 57 | /* Values for the origin field of struct directive. KANDR directives |
58 | come from traditional (K&R) C. STDC89 directives come from the | |
59 | 1989 C standard. EXTENSION directives are extensions. */ | |
60 | #define KANDR 0 | |
61 | #define STDC89 1 | |
62 | #define EXTENSION 2 | |
63 | ||
64 | /* Values for the flags field of struct directive. COND indicates a | |
65 | conditional; IF_COND an opening conditional. INCL means to treat | |
66 | "..." and <...> as q-char and h-char sequences respectively. IN_I | |
67 | means this directive should be handled even if -fpreprocessed is in | |
fb83e0d6 | 68 | effect (these are the directives with callback hooks). |
69 | ||
bab5e68f | 70 | EXPAND is set on directives that are always macro-expanded. */ |
79bd622b | 71 | #define COND (1 << 0) |
72 | #define IF_COND (1 << 1) | |
73 | #define INCL (1 << 2) | |
74 | #define IN_I (1 << 3) | |
fb83e0d6 | 75 | #define EXPAND (1 << 4) |
fb9753dc | 76 | #define DEPRECATED (1 << 5) |
79bd622b | 77 | |
78 | /* Defines one #-directive, including how to handle it. */ | |
f7fdd7a1 | 79 | typedef void (*directive_handler) (cpp_reader *); |
79bd622b | 80 | typedef struct directive directive; |
81 | struct directive | |
82 | { | |
83 | directive_handler handler; /* Function to handle directive. */ | |
b6d18b0a | 84 | const uchar *name; /* Name of directive. */ |
79bd622b | 85 | unsigned short length; /* Length of name. */ |
86 | unsigned char origin; /* Origin of directive. */ | |
87 | unsigned char flags; /* Flags describing this directive. */ | |
88 | }; | |
89 | ||
08c74ec4 | 90 | /* Forward declarations. */ |
91 | ||
f7fdd7a1 | 92 | static void skip_rest_of_line (cpp_reader *); |
6cda323a | 93 | static void check_eol (cpp_reader *, bool); |
f7fdd7a1 | 94 | static void start_directive (cpp_reader *); |
95 | static void prepare_directive_trad (cpp_reader *); | |
96 | static void end_directive (cpp_reader *, int); | |
97 | static void directive_diagnostics (cpp_reader *, const directive *, int); | |
98 | static void run_directive (cpp_reader *, int, const char *, size_t); | |
99 | static char *glue_header_name (cpp_reader *); | |
78ed8e3d | 100 | static const char *parse_include (cpp_reader *, int *, const cpp_token ***, |
101 | source_location *); | |
f7fdd7a1 | 102 | static void push_conditional (cpp_reader *, int, int, const cpp_hashnode *); |
103 | static unsigned int read_flag (cpp_reader *, unsigned int); | |
98e29890 | 104 | static bool strtolinenum (const uchar *, size_t, linenum_type *, bool *); |
3a79f5da | 105 | static void do_diagnostic (cpp_reader *, int, int, int); |
3e2a04b5 | 106 | static cpp_hashnode *lex_macro_node (cpp_reader *, bool); |
40109983 | 107 | static int undefine_macros (cpp_reader *, cpp_hashnode *, void *); |
f7fdd7a1 | 108 | static void do_include_common (cpp_reader *, enum include_type); |
109 | static struct pragma_entry *lookup_pragma_entry (struct pragma_entry *, | |
110 | const cpp_hashnode *); | |
f7fdd7a1 | 111 | static int count_registered_pragmas (struct pragma_entry *); |
112 | static char ** save_registered_pragmas (struct pragma_entry *, char **); | |
113 | static char ** restore_registered_pragmas (cpp_reader *, struct pragma_entry *, | |
114 | char **); | |
115 | static void do_pragma_once (cpp_reader *); | |
116 | static void do_pragma_poison (cpp_reader *); | |
117 | static void do_pragma_system_header (cpp_reader *); | |
118 | static void do_pragma_dependency (cpp_reader *); | |
a1f1781a | 119 | static void do_pragma_warning_or_error (cpp_reader *, bool error); |
120 | static void do_pragma_warning (cpp_reader *); | |
121 | static void do_pragma_error (cpp_reader *); | |
f7fdd7a1 | 122 | static void do_linemarker (cpp_reader *); |
123 | static const cpp_token *get_token_no_padding (cpp_reader *); | |
124 | static const cpp_token *get__Pragma_string (cpp_reader *); | |
125 | static void destringize_and_run (cpp_reader *, const cpp_string *); | |
78ed8e3d | 126 | static int parse_answer (cpp_reader *, struct answer **, int, source_location); |
f7fdd7a1 | 127 | static cpp_hashnode *parse_assertion (cpp_reader *, struct answer **, int); |
128 | static struct answer ** find_answer (cpp_hashnode *, const struct answer *); | |
129 | static void handle_assertion (cpp_reader *, const char *, int); | |
038c21f1 | 130 | static void do_pragma_push_macro (cpp_reader *); |
131 | static void do_pragma_pop_macro (cpp_reader *); | |
0d601ff4 | 132 | static void cpp_pop_definition (cpp_reader *, struct def_pragma_macro *); |
a4b4a940 | 133 | |
4bf559f2 | 134 | /* This is the table of directive handlers. It is ordered by |
135 | frequency of occurrence; the numbers at the end are directive | |
136 | counts from all the source code I have lying around (egcs and libc | |
137 | CVS as of 1999-05-18, plus grub-0.5.91, linux-2.2.9, and | |
79bd622b | 138 | pcmcia-cs-3.0.9). This is no longer important as directive lookup |
fb9753dc | 139 | is now O(1). All extensions other than #warning, #include_next, |
140 | and #import are deprecated. The name is where the extension | |
141 | appears to have come from. */ | |
4bf559f2 | 142 | |
79bd622b | 143 | #define DIRECTIVE_TABLE \ |
144 | D(define, T_DEFINE = 0, KANDR, IN_I) /* 270554 */ \ | |
bab5e68f | 145 | D(include, T_INCLUDE, KANDR, INCL | EXPAND) /* 52262 */ \ |
79bd622b | 146 | D(endif, T_ENDIF, KANDR, COND) /* 45855 */ \ |
147 | D(ifdef, T_IFDEF, KANDR, COND | IF_COND) /* 22000 */ \ | |
fb83e0d6 | 148 | D(if, T_IF, KANDR, COND | IF_COND | EXPAND) /* 18162 */ \ |
79bd622b | 149 | D(else, T_ELSE, KANDR, COND) /* 9863 */ \ |
150 | D(ifndef, T_IFNDEF, KANDR, COND | IF_COND) /* 9675 */ \ | |
151 | D(undef, T_UNDEF, KANDR, IN_I) /* 4837 */ \ | |
fb83e0d6 | 152 | D(line, T_LINE, KANDR, EXPAND) /* 2465 */ \ |
153 | D(elif, T_ELIF, STDC89, COND | EXPAND) /* 610 */ \ | |
79bd622b | 154 | D(error, T_ERROR, STDC89, 0) /* 475 */ \ |
155 | D(pragma, T_PRAGMA, STDC89, IN_I) /* 195 */ \ | |
156 | D(warning, T_WARNING, EXTENSION, 0) /* 22 */ \ | |
bab5e68f | 157 | D(include_next, T_INCLUDE_NEXT, EXTENSION, INCL | EXPAND) /* 19 */ \ |
8f2ff12e | 158 | D(ident, T_IDENT, EXTENSION, IN_I) /* 11 */ \ |
bab5e68f | 159 | D(import, T_IMPORT, EXTENSION, INCL | EXPAND) /* 0 ObjC */ \ |
fb9753dc | 160 | D(assert, T_ASSERT, EXTENSION, DEPRECATED) /* 0 SVR4 */ \ |
161 | D(unassert, T_UNASSERT, EXTENSION, DEPRECATED) /* 0 SVR4 */ \ | |
8f2ff12e | 162 | D(sccs, T_SCCS, EXTENSION, IN_I) /* 0 SVR4? */ |
81e19b31 | 163 | |
164 | /* #sccs is synonymous with #ident. */ | |
165 | #define do_sccs do_ident | |
ef33b55c | 166 | |
4bf559f2 | 167 | /* Use the table to generate a series of prototypes, an enum for the |
168 | directive names, and an array of directive handlers. */ | |
169 | ||
f7fdd7a1 | 170 | #define D(name, t, o, f) static void do_##name (cpp_reader *); |
4bf559f2 | 171 | DIRECTIVE_TABLE |
172 | #undef D | |
173 | ||
f80e83a9 | 174 | #define D(n, tag, o, f) tag, |
4bf559f2 | 175 | enum |
176 | { | |
177 | DIRECTIVE_TABLE | |
178 | N_DIRECTIVES | |
1d6fa33f | 179 | }; |
4bf559f2 | 180 | #undef D |
181 | ||
f80e83a9 | 182 | #define D(name, t, origin, flags) \ |
18e43155 | 183 | { do_##name, (const uchar *) #name, \ |
184 | sizeof #name - 1, origin, flags }, | |
79bd622b | 185 | static const directive dtable[] = |
4bf559f2 | 186 | { |
187 | DIRECTIVE_TABLE | |
188 | }; | |
189 | #undef D | |
190 | #undef DIRECTIVE_TABLE | |
1d6fa33f | 191 | |
25266990 | 192 | /* Wrapper struct directive for linemarkers. |
193 | The origin is more or less true - the original K+R cpp | |
194 | did use this notation in its preprocessed output. */ | |
195 | static const directive linemarker_dir = | |
196 | { | |
924bbf02 | 197 | do_linemarker, UC"#", 1, KANDR, IN_I |
25266990 | 198 | }; |
199 | ||
fb83e0d6 | 200 | #define SEEN_EOL() (pfile->cur_token[-1].type == CPP_EOF) |
1ea7ed21 | 201 | |
79bd622b | 202 | /* Skip any remaining tokens in a directive. */ |
203 | static void | |
f7fdd7a1 | 204 | skip_rest_of_line (cpp_reader *pfile) |
6060326b | 205 | { |
79bd622b | 206 | /* Discard all stacked contexts. */ |
6e5ef531 | 207 | while (pfile->context->prev) |
79bd622b | 208 | _cpp_pop_context (pfile); |
209 | ||
920b5d41 | 210 | /* Sweep up all tokens remaining on the line. */ |
c00e481c | 211 | if (! SEEN_EOL ()) |
212 | while (_cpp_lex_token (pfile)->type != CPP_EOF) | |
213 | ; | |
79bd622b | 214 | } |
6060326b | 215 | |
f0fbe519 | 216 | /* Helper function for check_oel. */ |
217 | ||
79bd622b | 218 | static void |
f0fbe519 | 219 | check_eol_1 (cpp_reader *pfile, bool expand, int reason) |
79bd622b | 220 | { |
6cda323a | 221 | if (! SEEN_EOL () && (expand |
222 | ? cpp_get_token (pfile) | |
223 | : _cpp_lex_token (pfile))->type != CPP_EOF) | |
f0fbe519 | 224 | cpp_pedwarning (pfile, reason, "extra tokens at end of #%s directive", |
225 | pfile->directive->name); | |
226 | } | |
227 | ||
228 | /* Variant of check_eol used for Wendif-labels warnings. */ | |
229 | ||
230 | static void | |
231 | check_eol_endif_labels (cpp_reader *pfile) | |
232 | { | |
233 | check_eol_1 (pfile, false, CPP_W_ENDIF_LABELS); | |
234 | } | |
235 | ||
236 | /* Ensure there are no stray tokens at the end of a directive. If | |
237 | EXPAND is true, tokens macro-expanding to nothing are allowed. */ | |
238 | ||
239 | static void | |
240 | check_eol (cpp_reader *pfile, bool expand) | |
241 | { | |
242 | check_eol_1 (pfile, expand, CPP_W_NONE); | |
79bd622b | 243 | } |
244 | ||
f789fe3e | 245 | /* Ensure there are no stray tokens other than comments at the end of |
246 | a directive, and gather the comments. */ | |
247 | static const cpp_token ** | |
248 | check_eol_return_comments (cpp_reader *pfile) | |
249 | { | |
250 | size_t c; | |
251 | size_t capacity = 8; | |
252 | const cpp_token **buf; | |
253 | ||
254 | buf = XNEWVEC (const cpp_token *, capacity); | |
255 | c = 0; | |
256 | if (! SEEN_EOL ()) | |
257 | { | |
258 | while (1) | |
259 | { | |
260 | const cpp_token *tok; | |
261 | ||
262 | tok = _cpp_lex_token (pfile); | |
263 | if (tok->type == CPP_EOF) | |
264 | break; | |
265 | if (tok->type != CPP_COMMENT) | |
266 | cpp_error (pfile, CPP_DL_PEDWARN, | |
267 | "extra tokens at end of #%s directive", | |
268 | pfile->directive->name); | |
269 | else | |
270 | { | |
271 | if (c + 1 >= capacity) | |
272 | { | |
273 | capacity *= 2; | |
274 | buf = XRESIZEVEC (const cpp_token *, buf, capacity); | |
275 | } | |
276 | buf[c] = tok; | |
277 | ++c; | |
278 | } | |
279 | } | |
280 | } | |
281 | buf[c] = NULL; | |
282 | return buf; | |
283 | } | |
284 | ||
9677c711 | 285 | /* Called when entering a directive, _Pragma or command-line directive. */ |
286 | static void | |
f7fdd7a1 | 287 | start_directive (cpp_reader *pfile) |
79bd622b | 288 | { |
343fd982 | 289 | /* Setup in-directive state. */ |
290 | pfile->state.in_directive = 1; | |
291 | pfile->state.save_comments = 0; | |
d6d3c909 | 292 | pfile->directive_result.type = CPP_PADDING; |
343fd982 | 293 | |
79bd622b | 294 | /* Some handlers need the position of the # for diagnostics. */ |
dbddc569 | 295 | pfile->directive_line = pfile->line_table->highest_line; |
9677c711 | 296 | } |
297 | ||
298 | /* Called when leaving a directive, _Pragma or command-line directive. */ | |
299 | static void | |
f7fdd7a1 | 300 | end_directive (cpp_reader *pfile, int skip_line) |
9677c711 | 301 | { |
65861c3e | 302 | if (CPP_OPTION (pfile, traditional)) |
fb83e0d6 | 303 | { |
bab5e68f | 304 | /* Revert change of prepare_directive_trad. */ |
65861c3e | 305 | if (!pfile->state.in_deferred_pragma) |
306 | pfile->state.prevent_expansion--; | |
bab5e68f | 307 | |
c455fac3 | 308 | if (pfile->directive != &dtable[T_DEFINE]) |
fb83e0d6 | 309 | _cpp_remove_overlay (pfile); |
310 | } | |
65861c3e | 311 | else if (pfile->state.in_deferred_pragma) |
312 | ; | |
9677c711 | 313 | /* We don't skip for an assembler #. */ |
c455fac3 | 314 | else if (skip_line) |
1ea7ed21 | 315 | { |
316 | skip_rest_of_line (pfile); | |
fb5ab82c | 317 | if (!pfile->keep_tokens) |
318 | { | |
319 | pfile->cur_run = &pfile->base_run; | |
320 | pfile->cur_token = pfile->base_run.base; | |
321 | } | |
1ea7ed21 | 322 | } |
9677c711 | 323 | |
324 | /* Restore state. */ | |
9677c711 | 325 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
326 | pfile->state.in_directive = 0; | |
bab5e68f | 327 | pfile->state.in_expression = 0; |
9677c711 | 328 | pfile->state.angled_headers = 0; |
329 | pfile->directive = 0; | |
330 | } | |
331 | ||
fb83e0d6 | 332 | /* Prepare to handle the directive in pfile->directive. */ |
333 | static void | |
f7fdd7a1 | 334 | prepare_directive_trad (cpp_reader *pfile) |
fb83e0d6 | 335 | { |
cbe337b6 | 336 | if (pfile->directive != &dtable[T_DEFINE]) |
fb83e0d6 | 337 | { |
c455fac3 | 338 | bool no_expand = (pfile->directive |
339 | && ! (pfile->directive->flags & EXPAND)); | |
01628c3c | 340 | bool was_skipping = pfile->state.skipping; |
fb83e0d6 | 341 | |
bab5e68f | 342 | pfile->state.in_expression = (pfile->directive == &dtable[T_IF] |
343 | || pfile->directive == &dtable[T_ELIF]); | |
8b837dff | 344 | if (pfile->state.in_expression) |
345 | pfile->state.skipping = false; | |
346 | ||
fb83e0d6 | 347 | if (no_expand) |
348 | pfile->state.prevent_expansion++; | |
69edc0b3 | 349 | _cpp_scan_out_logical_line (pfile, NULL); |
fb83e0d6 | 350 | if (no_expand) |
351 | pfile->state.prevent_expansion--; | |
8b837dff | 352 | |
01628c3c | 353 | pfile->state.skipping = was_skipping; |
fb83e0d6 | 354 | _cpp_overlay_buffer (pfile, pfile->out.base, |
355 | pfile->out.cur - pfile->out.base); | |
356 | } | |
bab5e68f | 357 | |
358 | /* Stop ISO C from expanding anything. */ | |
359 | pfile->state.prevent_expansion++; | |
fb83e0d6 | 360 | } |
361 | ||
d10cfa8d | 362 | /* Output diagnostics for a directive DIR. INDENTED is nonzero if |
d0d481d7 | 363 | the '#' was indented. */ |
d0d481d7 | 364 | static void |
f7fdd7a1 | 365 | directive_diagnostics (cpp_reader *pfile, const directive *dir, int indented) |
d0d481d7 | 366 | { |
fb9753dc | 367 | /* Issue -pedantic or deprecated warnings for extensions. We let |
368 | -pedantic take precedence if both are applicable. */ | |
369 | if (! pfile->state.skipping) | |
370 | { | |
371 | if (dir->origin == EXTENSION | |
372 | && !(dir == &dtable[T_IMPORT] && CPP_OPTION (pfile, objc)) | |
373 | && CPP_PEDANTIC (pfile)) | |
374 | cpp_error (pfile, CPP_DL_PEDWARN, "#%s is a GCC extension", dir->name); | |
375 | else if (((dir->flags & DEPRECATED) != 0 | |
376 | || (dir == &dtable[T_IMPORT] && !CPP_OPTION (pfile, objc))) | |
5ae82d58 | 377 | && CPP_OPTION (pfile, cpp_warn_deprecated)) |
3a79f5da | 378 | cpp_warning (pfile, CPP_W_DEPRECATED, |
379 | "#%s is a deprecated GCC extension", dir->name); | |
fb9753dc | 380 | } |
25266990 | 381 | |
382 | /* Traditionally, a directive is ignored unless its # is in | |
383 | column 1. Therefore in code intended to work with K+R | |
384 | compilers, directives added by C89 must have their # | |
385 | indented, and directives present in traditional C must not. | |
386 | This is true even of directives in skipped conditional | |
387 | blocks. #elif cannot be used at all. */ | |
388 | if (CPP_WTRADITIONAL (pfile)) | |
d0d481d7 | 389 | { |
25266990 | 390 | if (dir == &dtable[T_ELIF]) |
3a79f5da | 391 | cpp_warning (pfile, CPP_W_TRADITIONAL, |
392 | "suggest not using #elif in traditional C"); | |
25266990 | 393 | else if (indented && dir->origin == KANDR) |
3a79f5da | 394 | cpp_warning (pfile, CPP_W_TRADITIONAL, |
395 | "traditional C ignores #%s with the # indented", | |
396 | dir->name); | |
25266990 | 397 | else if (!indented && dir->origin != KANDR) |
3a79f5da | 398 | cpp_warning (pfile, CPP_W_TRADITIONAL, |
399 | "suggest hiding #%s from traditional C with an indented #", | |
400 | dir->name); | |
d0d481d7 | 401 | } |
402 | } | |
403 | ||
d10cfa8d | 404 | /* Check if we have a known directive. INDENTED is nonzero if the |
d0d481d7 | 405 | '#' of the directive was indented. This function is in this file |
f03668bd | 406 | to save unnecessarily exporting dtable etc. to lex.c. Returns |
d10cfa8d | 407 | nonzero if the line of tokens has been handled, zero if we should |
d0d481d7 | 408 | continue processing the line. */ |
9677c711 | 409 | int |
f7fdd7a1 | 410 | _cpp_handle_directive (cpp_reader *pfile, int indented) |
9677c711 | 411 | { |
9677c711 | 412 | const directive *dir = 0; |
c00e481c | 413 | const cpp_token *dname; |
d6af0368 | 414 | bool was_parsing_args = pfile->state.parsing_args; |
3eb3f293 | 415 | bool was_discarding_output = pfile->state.discarding_output; |
9677c711 | 416 | int skip = 1; |
417 | ||
3eb3f293 | 418 | if (was_discarding_output) |
419 | pfile->state.prevent_expansion = 0; | |
420 | ||
d6af0368 | 421 | if (was_parsing_args) |
422 | { | |
5ae82d58 | 423 | if (CPP_OPTION (pfile, cpp_pedantic)) |
d80d2074 | 424 | cpp_error (pfile, CPP_DL_PEDWARN, |
d6af0368 | 425 | "embedding a directive within macro arguments is not portable"); |
426 | pfile->state.parsing_args = 0; | |
427 | pfile->state.prevent_expansion = 0; | |
428 | } | |
9677c711 | 429 | start_directive (pfile); |
c00e481c | 430 | dname = _cpp_lex_token (pfile); |
338fa5f7 | 431 | |
c00e481c | 432 | if (dname->type == CPP_NAME) |
338fa5f7 | 433 | { |
2ee04baa | 434 | if (dname->val.node.node->is_directive) |
435 | dir = &dtable[dname->val.node.node->directive_index]; | |
338fa5f7 | 436 | } |
a2f10574 | 437 | /* We do not recognize the # followed by a number extension in |
d0d481d7 | 438 | assembler code. */ |
c00e481c | 439 | else if (dname->type == CPP_NUMBER && CPP_OPTION (pfile, lang) != CLK_ASM) |
338fa5f7 | 440 | { |
25266990 | 441 | dir = &linemarker_dir; |
442 | if (CPP_PEDANTIC (pfile) && ! CPP_OPTION (pfile, preprocessed) | |
443 | && ! pfile->state.skipping) | |
d80d2074 | 444 | cpp_error (pfile, CPP_DL_PEDWARN, |
73328dce | 445 | "style of line directive is a GCC extension"); |
79bd622b | 446 | } |
338fa5f7 | 447 | |
79bd622b | 448 | if (dir) |
449 | { | |
d0d481d7 | 450 | /* If we have a directive that is not an opening conditional, |
451 | invalidate any control macro. */ | |
452 | if (! (dir->flags & IF_COND)) | |
453 | pfile->mi_valid = false; | |
454 | ||
455 | /* Kluge alert. In order to be sure that code like this | |
456 | ||
457 | #define HASH # | |
458 | HASH define foo bar | |
459 | ||
460 | does not cause '#define foo bar' to get executed when | |
461 | compiled with -save-temps, we recognize directives in | |
f03668bd | 462 | -fpreprocessed mode only if the # is in column 1. macro.c |
fcde64dc | 463 | puts a space in front of any '#' at the start of a macro. |
464 | ||
465 | We exclude the -fdirectives-only case because macro expansion | |
466 | has not been performed yet, and block comments can cause spaces | |
e8aa7eaf | 467 | to precede the directive. */ |
d0d481d7 | 468 | if (CPP_OPTION (pfile, preprocessed) |
fcde64dc | 469 | && !CPP_OPTION (pfile, directives_only) |
d0d481d7 | 470 | && (indented || !(dir->flags & IN_I))) |
946ce1b7 | 471 | { |
d0d481d7 | 472 | skip = 0; |
473 | dir = 0; | |
946ce1b7 | 474 | } |
475 | else | |
79bd622b | 476 | { |
d0d481d7 | 477 | /* In failed conditional groups, all non-conditional |
478 | directives are ignored. Before doing that, whether | |
479 | skipping or not, we should lex angle-bracketed headers | |
480 | correctly, and maybe output some diagnostics. */ | |
481 | pfile->state.angled_headers = dir->flags & INCL; | |
7825551f | 482 | pfile->state.directive_wants_padding = dir->flags & INCL; |
d0d481d7 | 483 | if (! CPP_OPTION (pfile, preprocessed)) |
484 | directive_diagnostics (pfile, dir, indented); | |
485 | if (pfile->state.skipping && !(dir->flags & COND)) | |
486 | dir = 0; | |
79bd622b | 487 | } |
488 | } | |
c00e481c | 489 | else if (dname->type == CPP_EOF) |
d0d481d7 | 490 | ; /* CPP_EOF is the "null directive". */ |
491 | else | |
79bd622b | 492 | { |
493 | /* An unknown directive. Don't complain about it in assembly | |
494 | source: we don't know where the comments are, and # may | |
495 | introduce assembler pseudo-ops. Don't complain about invalid | |
496 | directives in skipped conditional groups (6.10 p4). */ | |
5db5d057 | 497 | if (CPP_OPTION (pfile, lang) == CLK_ASM) |
d0d481d7 | 498 | skip = 0; |
499 | else if (!pfile->state.skipping) | |
d80d2074 | 500 | cpp_error (pfile, CPP_DL_ERROR, "invalid preprocessing directive #%s", |
c00e481c | 501 | cpp_token_as_text (pfile, dname)); |
338fa5f7 | 502 | } |
503 | ||
94fed299 | 504 | pfile->directive = dir; |
505 | if (CPP_OPTION (pfile, traditional)) | |
506 | prepare_directive_trad (pfile); | |
507 | ||
d0d481d7 | 508 | if (dir) |
f7fdd7a1 | 509 | pfile->directive->handler (pfile); |
d0d481d7 | 510 | else if (skip == 0) |
511 | _cpp_backup_tokens (pfile, 1); | |
512 | ||
513 | end_directive (pfile, skip); | |
45f9f140 | 514 | if (was_parsing_args && !pfile->state.in_deferred_pragma) |
d6af0368 | 515 | { |
516 | /* Restore state when within macro args. */ | |
517 | pfile->state.parsing_args = 2; | |
518 | pfile->state.prevent_expansion = 1; | |
d6af0368 | 519 | } |
3eb3f293 | 520 | if (was_discarding_output) |
521 | pfile->state.prevent_expansion = 1; | |
9677c711 | 522 | return skip; |
f80e83a9 | 523 | } |
1d6fa33f | 524 | |
79bd622b | 525 | /* Directive handler wrapper used by the command line option |
a54e0bf8 | 526 | processor. BUF is \n terminated. */ |
79bd622b | 527 | static void |
f7fdd7a1 | 528 | run_directive (cpp_reader *pfile, int dir_no, const char *buf, size_t count) |
e3630c4b | 529 | { |
b6d18b0a | 530 | cpp_push_buffer (pfile, (const uchar *) buf, count, |
9eb74666 | 531 | /* from_stage3 */ true); |
6cee4464 | 532 | start_directive (pfile); |
a54e0bf8 | 533 | |
534 | /* This is a short-term fix to prevent a leading '#' being | |
535 | interpreted as a directive. */ | |
536 | _cpp_clean_line (pfile); | |
537 | ||
7b5cc295 | 538 | pfile->directive = &dtable[dir_no]; |
fb83e0d6 | 539 | if (CPP_OPTION (pfile, traditional)) |
540 | prepare_directive_trad (pfile); | |
f7fdd7a1 | 541 | pfile->directive->handler (pfile); |
6cee4464 | 542 | end_directive (pfile, 1); |
4dfe8b74 | 543 | _cpp_pop_buffer (pfile); |
79bd622b | 544 | } |
545 | ||
546 | /* Checks for validity the macro name in #define, #undef, #ifdef and | |
3e2a04b5 | 547 | #ifndef directives. IS_DEF_OR_UNDEF is true if this call is |
548 | processing a #define or #undefine directive, and false | |
549 | otherwise. */ | |
f80e83a9 | 550 | static cpp_hashnode * |
3e2a04b5 | 551 | lex_macro_node (cpp_reader *pfile, bool is_def_or_undef) |
f80e83a9 | 552 | { |
fb83e0d6 | 553 | const cpp_token *token = _cpp_lex_token (pfile); |
c4357c92 | 554 | |
31674461 | 555 | /* The token immediately after #define must be an identifier. That |
f17c0828 | 556 | identifier may not be "defined", per C99 6.10.8p4. |
557 | In C++, it may not be any of the "named operators" either, | |
558 | per C++98 [lex.digraph], [lex.key]. | |
559 | Finally, the identifier may not have been poisoned. (In that case | |
9a26b86f | 560 | the lexer has issued the error message for us.) */ |
f15f6c8d | 561 | |
fb83e0d6 | 562 | if (token->type == CPP_NAME) |
563 | { | |
2ee04baa | 564 | cpp_hashnode *node = token->val.node.node; |
31674461 | 565 | |
3e2a04b5 | 566 | if (is_def_or_undef && node == pfile->spec_nodes.n_defined) |
d80d2074 | 567 | cpp_error (pfile, CPP_DL_ERROR, |
fb83e0d6 | 568 | "\"defined\" cannot be used as a macro name"); |
f6751ff2 | 569 | else if (is_def_or_undef |
570 | && (node == pfile->spec_nodes.n__has_include__ | |
571 | || node == pfile->spec_nodes.n__has_include_next__)) | |
572 | cpp_error (pfile, CPP_DL_ERROR, | |
573 | "\"__has_include__\" cannot be used as a macro name"); | |
fb83e0d6 | 574 | else if (! (node->flags & NODE_POISONED)) |
575 | return node; | |
71aa9da4 | 576 | } |
fb83e0d6 | 577 | else if (token->flags & NAMED_OP) |
d80d2074 | 578 | cpp_error (pfile, CPP_DL_ERROR, |
f15f6c8d | 579 | "\"%s\" cannot be used as a macro name as it is an operator in C++", |
2ee04baa | 580 | NODE_NAME (token->val.node.node)); |
fb83e0d6 | 581 | else if (token->type == CPP_EOF) |
d80d2074 | 582 | cpp_error (pfile, CPP_DL_ERROR, "no macro name given in #%s directive", |
fb83e0d6 | 583 | pfile->directive->name); |
584 | else | |
d80d2074 | 585 | cpp_error (pfile, CPP_DL_ERROR, "macro names must be identifiers"); |
ef33b55c | 586 | |
f15f6c8d | 587 | return NULL; |
1d6fa33f | 588 | } |
1d6fa33f | 589 | |
f03668bd | 590 | /* Process a #define directive. Most work is done in macro.c. */ |
69461e0d | 591 | static void |
f7fdd7a1 | 592 | do_define (cpp_reader *pfile) |
1d6fa33f | 593 | { |
3e2a04b5 | 594 | cpp_hashnode *node = lex_macro_node (pfile, true); |
c030ed73 | 595 | |
79bd622b | 596 | if (node) |
597 | { | |
9a26b86f | 598 | /* If we have been requested to expand comments into macros, |
599 | then re-enable saving of comments. */ | |
600 | pfile->state.save_comments = | |
601 | ! CPP_OPTION (pfile, discard_comments_in_macro_exp); | |
602 | ||
34c3de48 | 603 | if (pfile->cb.before_define) |
604 | pfile->cb.before_define (pfile); | |
605 | ||
79bd622b | 606 | if (_cpp_create_definition (pfile, node)) |
607 | if (pfile->cb.define) | |
f7fdd7a1 | 608 | pfile->cb.define (pfile, pfile->directive_line, node); |
34c3de48 | 609 | |
610 | node->flags &= ~NODE_USED; | |
79bd622b | 611 | } |
f80e83a9 | 612 | } |
613 | ||
e484a1cc | 614 | /* Handle #undef. Mark the identifier NT_VOID in the hash table. */ |
69461e0d | 615 | static void |
f7fdd7a1 | 616 | do_undef (cpp_reader *pfile) |
f80e83a9 | 617 | { |
3e2a04b5 | 618 | cpp_hashnode *node = lex_macro_node (pfile, true); |
2c63d6c8 | 619 | |
8b837dff | 620 | if (node) |
2c63d6c8 | 621 | { |
34c3de48 | 622 | if (pfile->cb.before_define) |
623 | pfile->cb.before_define (pfile); | |
624 | ||
6cae2504 | 625 | if (pfile->cb.undef) |
f7fdd7a1 | 626 | pfile->cb.undef (pfile, pfile->directive_line, node); |
2c63d6c8 | 627 | |
8b837dff | 628 | /* 6.10.3.5 paragraph 2: [#undef] is ignored if the specified |
629 | identifier is not currently defined as a macro name. */ | |
630 | if (node->type == NT_MACRO) | |
631 | { | |
632 | if (node->flags & NODE_WARN) | |
633 | cpp_error (pfile, CPP_DL_WARNING, | |
634 | "undefining \"%s\"", NODE_NAME (node)); | |
a7d2e480 | 635 | else if ((node->flags & NODE_BUILTIN) |
636 | && CPP_OPTION (pfile, warn_builtin_macro_redefined)) | |
637 | cpp_warning_with_line (pfile, CPP_W_BUILTIN_MACRO_REDEFINED, | |
638 | pfile->directive_line, 0, | |
639 | "undefining \"%s\"", NODE_NAME (node)); | |
2c63d6c8 | 640 | |
8b837dff | 641 | if (CPP_OPTION (pfile, warn_unused_macros)) |
642 | _cpp_warn_if_unused_macro (pfile, node, NULL); | |
71a7c282 | 643 | |
8b837dff | 644 | _cpp_free_definition (node); |
645 | } | |
2c63d6c8 | 646 | } |
8b837dff | 647 | |
6cda323a | 648 | check_eol (pfile, false); |
1d6fa33f | 649 | } |
650 | ||
40109983 | 651 | /* Undefine a single macro/assertion/whatever. */ |
652 | ||
653 | static int | |
3eb3f293 | 654 | undefine_macros (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *h, |
40109983 | 655 | void *data_p ATTRIBUTE_UNUSED) |
656 | { | |
3eb3f293 | 657 | /* Body of _cpp_free_definition inlined here for speed. |
658 | Macros and assertions no longer have anything to free. */ | |
659 | h->type = NT_VOID; | |
34c3de48 | 660 | h->flags &= ~(NODE_POISONED|NODE_BUILTIN|NODE_DISABLED|NODE_USED); |
40109983 | 661 | return 1; |
662 | } | |
663 | ||
664 | /* Undefine all macros and assertions. */ | |
665 | ||
666 | void | |
667 | cpp_undef_all (cpp_reader *pfile) | |
668 | { | |
669 | cpp_forall_identifiers (pfile, undefine_macros, NULL); | |
670 | } | |
671 | ||
672 | ||
79bd622b | 673 | /* Helper routine used by parse_include. Reinterpret the current line |
674 | as an h-char-sequence (< ... >); we are looking at the first token | |
58efbd5a | 675 | after the <. Returns a malloced filename. */ |
676 | static char * | |
f7fdd7a1 | 677 | glue_header_name (cpp_reader *pfile) |
79bd622b | 678 | { |
f9b5f742 | 679 | const cpp_token *token; |
58efbd5a | 680 | char *buffer; |
92b1c81a | 681 | size_t len, total_len = 0, capacity = 1024; |
79bd622b | 682 | |
683 | /* To avoid lexed tokens overwriting our glued name, we can only | |
684 | allocate from the string pool once we've lexed everything. */ | |
720aca92 | 685 | buffer = XNEWVEC (char, capacity); |
79bd622b | 686 | for (;;) |
687 | { | |
7825551f | 688 | token = get_token_no_padding (pfile); |
79bd622b | 689 | |
58efbd5a | 690 | if (token->type == CPP_GREATER) |
79bd622b | 691 | break; |
58efbd5a | 692 | if (token->type == CPP_EOF) |
693 | { | |
d80d2074 | 694 | cpp_error (pfile, CPP_DL_ERROR, "missing terminating > character"); |
58efbd5a | 695 | break; |
696 | } | |
79bd622b | 697 | |
b1280514 | 698 | len = cpp_token_len (token) + 2; /* Leading space, terminating \0. */ |
92b1c81a | 699 | if (total_len + len > capacity) |
79bd622b | 700 | { |
92b1c81a | 701 | capacity = (capacity + len) * 2; |
720aca92 | 702 | buffer = XRESIZEVEC (char, buffer, capacity); |
79bd622b | 703 | } |
704 | ||
f9b5f742 | 705 | if (token->flags & PREV_WHITE) |
92b1c81a | 706 | buffer[total_len++] = ' '; |
79bd622b | 707 | |
bb1fa6bb | 708 | total_len = (cpp_spell_token (pfile, token, (uchar *) &buffer[total_len], |
709 | true) | |
58efbd5a | 710 | - (uchar *) buffer); |
79bd622b | 711 | } |
f80e83a9 | 712 | |
58efbd5a | 713 | buffer[total_len] = '\0'; |
714 | return buffer; | |
79bd622b | 715 | } |
1d6fa33f | 716 | |
58efbd5a | 717 | /* Returns the file name of #include, #include_next, #import and |
718 | #pragma dependency. The string is malloced and the caller should | |
78ed8e3d | 719 | free it. Returns NULL on error. LOCATION is the source location |
720 | of the file name. */ | |
721 | ||
58efbd5a | 722 | static const char * |
f789fe3e | 723 | parse_include (cpp_reader *pfile, int *pangle_brackets, |
78ed8e3d | 724 | const cpp_token ***buf, source_location *location) |
1d6fa33f | 725 | { |
58efbd5a | 726 | char *fname; |
f9b5f742 | 727 | const cpp_token *header; |
1d6fa33f | 728 | |
79bd622b | 729 | /* Allow macro expansion. */ |
7825551f | 730 | header = get_token_no_padding (pfile); |
78ed8e3d | 731 | *location = header->src_loc; |
538ba11a | 732 | if ((header->type == CPP_STRING && header->val.str.text[0] != 'R') |
733 | || header->type == CPP_HEADER_NAME) | |
1d6fa33f | 734 | { |
720aca92 | 735 | fname = XNEWVEC (char, header->val.str.len - 1); |
4970d4c2 | 736 | memcpy (fname, header->val.str.text + 1, header->val.str.len - 2); |
737 | fname[header->val.str.len - 2] = '\0'; | |
58efbd5a | 738 | *pangle_brackets = header->type == CPP_HEADER_NAME; |
1d6fa33f | 739 | } |
58efbd5a | 740 | else if (header->type == CPP_LESS) |
1d6fa33f | 741 | { |
58efbd5a | 742 | fname = glue_header_name (pfile); |
743 | *pangle_brackets = 1; | |
744 | } | |
745 | else | |
746 | { | |
747 | const unsigned char *dir; | |
748 | ||
749 | if (pfile->directive == &dtable[T_PRAGMA]) | |
924bbf02 | 750 | dir = UC"pragma dependency"; |
58efbd5a | 751 | else |
752 | dir = pfile->directive->name; | |
d80d2074 | 753 | cpp_error (pfile, CPP_DL_ERROR, "#%s expects \"FILENAME\" or <FILENAME>", |
58efbd5a | 754 | dir); |
755 | ||
f9b5f742 | 756 | return NULL; |
1d6fa33f | 757 | } |
1d6fa33f | 758 | |
36ec4203 | 759 | if (pfile->directive == &dtable[T_PRAGMA]) |
760 | { | |
761 | /* This pragma allows extra tokens after the file name. */ | |
762 | } | |
763 | else if (buf == NULL || CPP_OPTION (pfile, discard_comments)) | |
3e52c418 | 764 | check_eol (pfile, true); |
f789fe3e | 765 | else |
766 | { | |
767 | /* If we are not discarding comments, then gather them while | |
768 | doing the eol check. */ | |
769 | *buf = check_eol_return_comments (pfile); | |
770 | } | |
771 | ||
58efbd5a | 772 | return fname; |
4bf559f2 | 773 | } |
d453a374 | 774 | |
0d6d8dc0 | 775 | /* Handle #include, #include_next and #import. */ |
69461e0d | 776 | static void |
f7fdd7a1 | 777 | do_include_common (cpp_reader *pfile, enum include_type type) |
4bf559f2 | 778 | { |
58efbd5a | 779 | const char *fname; |
780 | int angle_brackets; | |
f789fe3e | 781 | const cpp_token **buf = NULL; |
78ed8e3d | 782 | source_location location; |
f789fe3e | 783 | |
784 | /* Re-enable saving of comments if requested, so that the include | |
785 | callback can dump comments which follow #include. */ | |
786 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
58efbd5a | 787 | |
78ed8e3d | 788 | fname = parse_include (pfile, &angle_brackets, &buf, &location); |
58efbd5a | 789 | if (!fname) |
f789fe3e | 790 | { |
791 | if (buf) | |
792 | XDELETEVEC (buf); | |
793 | return; | |
794 | } | |
1d6fa33f | 795 | |
bd9e37a6 | 796 | if (!*fname) |
797 | { | |
78ed8e3d | 798 | cpp_error_with_line (pfile, CPP_DL_ERROR, location, 0, |
799 | "empty filename in #%s", | |
800 | pfile->directive->name); | |
f789fe3e | 801 | XDELETEVEC (fname); |
802 | if (buf) | |
803 | XDELETEVEC (buf); | |
bd9e37a6 | 804 | return; |
805 | } | |
806 | ||
f4578baa | 807 | /* Prevent #include recursion. */ |
ceec9c13 | 808 | if (pfile->line_table->depth >= CPP_STACK_MAX) |
d80d2074 | 809 | cpp_error (pfile, CPP_DL_ERROR, "#include nested too deeply"); |
58efbd5a | 810 | else |
968e3f9d | 811 | { |
58efbd5a | 812 | /* Get out of macro context, if we are. */ |
813 | skip_rest_of_line (pfile); | |
968e3f9d | 814 | |
58efbd5a | 815 | if (pfile->cb.include) |
f7fdd7a1 | 816 | pfile->cb.include (pfile, pfile->directive_line, |
f789fe3e | 817 | pfile->directive->name, fname, angle_brackets, |
818 | buf); | |
f4578baa | 819 | |
1824e2bd | 820 | _cpp_stack_include (pfile, fname, angle_brackets, type); |
58efbd5a | 821 | } |
f4578baa | 822 | |
f789fe3e | 823 | XDELETEVEC (fname); |
824 | if (buf) | |
825 | XDELETEVEC (buf); | |
4bf559f2 | 826 | } |
c4e0ec82 | 827 | |
69461e0d | 828 | static void |
f7fdd7a1 | 829 | do_include (cpp_reader *pfile) |
4bf559f2 | 830 | { |
0d6d8dc0 | 831 | do_include_common (pfile, IT_INCLUDE); |
832 | } | |
4bf559f2 | 833 | |
0d6d8dc0 | 834 | static void |
f7fdd7a1 | 835 | do_import (cpp_reader *pfile) |
0d6d8dc0 | 836 | { |
0d6d8dc0 | 837 | do_include_common (pfile, IT_IMPORT); |
4bf559f2 | 838 | } |
1d6fa33f | 839 | |
69461e0d | 840 | static void |
f7fdd7a1 | 841 | do_include_next (cpp_reader *pfile) |
4bf559f2 | 842 | { |
f4578baa | 843 | enum include_type type = IT_INCLUDE_NEXT; |
844 | ||
845 | /* If this is the primary source file, warn and use the normal | |
846 | search logic. */ | |
927b511f | 847 | if (cpp_in_primary_file (pfile)) |
f4578baa | 848 | { |
d80d2074 | 849 | cpp_error (pfile, CPP_DL_WARNING, |
f4578baa | 850 | "#include_next in primary source file"); |
851 | type = IT_INCLUDE; | |
852 | } | |
853 | do_include_common (pfile, type); | |
1d6fa33f | 854 | } |
1d6fa33f | 855 | |
25266990 | 856 | /* Subroutine of do_linemarker. Read possible flags after file name. |
857 | LAST is the last flag seen; 0 if this is the first flag. Return the | |
858 | flag if it is valid, 0 at the end of the directive. Otherwise | |
859 | complain. */ | |
2fd3b10b | 860 | static unsigned int |
f7fdd7a1 | 861 | read_flag (cpp_reader *pfile, unsigned int last) |
314ab6d5 | 862 | { |
c00e481c | 863 | const cpp_token *token = _cpp_lex_token (pfile); |
314ab6d5 | 864 | |
c00e481c | 865 | if (token->type == CPP_NUMBER && token->val.str.len == 1) |
314ab6d5 | 866 | { |
c00e481c | 867 | unsigned int flag = token->val.str.text[0] - '0'; |
53c052ca | 868 | |
869 | if (flag > last && flag <= 4 | |
870 | && (flag != 4 || last == 3) | |
871 | && (flag != 2 || last == 0)) | |
872 | return flag; | |
314ab6d5 | 873 | } |
79bd622b | 874 | |
c00e481c | 875 | if (token->type != CPP_EOF) |
d80d2074 | 876 | cpp_error (pfile, CPP_DL_ERROR, "invalid flag \"%s\" in line directive", |
c00e481c | 877 | cpp_token_as_text (pfile, token)); |
79bd622b | 878 | return 0; |
314ab6d5 | 879 | } |
880 | ||
25266990 | 881 | /* Subroutine of do_line and do_linemarker. Convert a number in STR, |
98e29890 | 882 | of length LEN, to binary; store it in NUMP, and return false if the |
883 | number was well-formed, true if not. WRAPPED is set to true if the | |
884 | number did not fit into 'unsigned long'. */ | |
885 | static bool | |
886 | strtolinenum (const uchar *str, size_t len, linenum_type *nump, bool *wrapped) | |
f80e83a9 | 887 | { |
4999c35b | 888 | linenum_type reg = 0; |
98e29890 | 889 | linenum_type reg_prev = 0; |
890 | ||
b6d18b0a | 891 | uchar c; |
98e29890 | 892 | *wrapped = false; |
f80e83a9 | 893 | while (len--) |
894 | { | |
895 | c = *str++; | |
896 | if (!ISDIGIT (c)) | |
98e29890 | 897 | return true; |
f80e83a9 | 898 | reg *= 10; |
899 | reg += c - '0'; | |
98e29890 | 900 | if (reg < reg_prev) |
901 | *wrapped = true; | |
902 | reg_prev = reg; | |
f80e83a9 | 903 | } |
904 | *nump = reg; | |
98e29890 | 905 | return false; |
f80e83a9 | 906 | } |
907 | ||
6d71dc85 | 908 | /* Interpret #line command. |
25266990 | 909 | Note that the filename string (if any) is a true string constant |
910 | (escapes are interpreted), unlike in #line. */ | |
69461e0d | 911 | static void |
f7fdd7a1 | 912 | do_line (cpp_reader *pfile) |
1d6fa33f | 913 | { |
dbddc569 | 914 | const struct line_maps *line_table = pfile->line_table; |
97bfb9ef | 915 | const struct line_map *map = LINEMAPS_LAST_ORDINARY_MAP (line_table); |
b0d0794d | 916 | |
917 | /* skip_rest_of_line() may cause line table to be realloc()ed so note down | |
918 | sysp right now. */ | |
919 | ||
97bfb9ef | 920 | unsigned char map_sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (map); |
f9b5f742 | 921 | const cpp_token *token; |
97bfb9ef | 922 | const char *new_file = ORDINARY_MAP_FILE_NAME (map); |
4999c35b | 923 | linenum_type new_lineno; |
79bd622b | 924 | |
d7503801 | 925 | /* C99 raised the minimum limit on #line numbers. */ |
4999c35b | 926 | linenum_type cap = CPP_OPTION (pfile, c99) ? 2147483647 : 32767; |
98e29890 | 927 | bool wrapped; |
d0d481d7 | 928 | |
79bd622b | 929 | /* #line commands expand macros. */ |
f9b5f742 | 930 | token = cpp_get_token (pfile); |
931 | if (token->type != CPP_NUMBER | |
4999c35b | 932 | || strtolinenum (token->val.str.text, token->val.str.len, |
98e29890 | 933 | &new_lineno, &wrapped)) |
1d6fa33f | 934 | { |
cde59b72 | 935 | if (token->type == CPP_EOF) |
936 | cpp_error (pfile, CPP_DL_ERROR, "unexpected end of file after #line"); | |
937 | else | |
938 | cpp_error (pfile, CPP_DL_ERROR, | |
939 | "\"%s\" after #line is not a positive integer", | |
940 | cpp_token_as_text (pfile, token)); | |
0653b94e | 941 | return; |
b1a9ff83 | 942 | } |
1d6fa33f | 943 | |
98e29890 | 944 | if (CPP_PEDANTIC (pfile) && (new_lineno == 0 || new_lineno > cap || wrapped)) |
d80d2074 | 945 | cpp_error (pfile, CPP_DL_PEDWARN, "line number out of range"); |
98e29890 | 946 | else if (wrapped) |
947 | cpp_error (pfile, CPP_DL_WARNING, "line number out of range"); | |
1d6fa33f | 948 | |
f9b5f742 | 949 | token = cpp_get_token (pfile); |
950 | if (token->type == CPP_STRING) | |
a852e3b1 | 951 | { |
ebc03810 | 952 | cpp_string s = { 0, 0 }; |
7bc95b56 | 953 | if (cpp_interpret_string_notranslate (pfile, &token->val.str, 1, |
723ebaea | 954 | &s, CPP_STRING)) |
ebc03810 | 955 | new_file = (const char *)s.text; |
6cda323a | 956 | check_eol (pfile, true); |
25266990 | 957 | } |
958 | else if (token->type != CPP_EOF) | |
959 | { | |
d80d2074 | 960 | cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", |
25266990 | 961 | cpp_token_as_text (pfile, token)); |
962 | return; | |
963 | } | |
964 | ||
965 | skip_rest_of_line (pfile); | |
1eecdb28 | 966 | _cpp_do_file_change (pfile, LC_RENAME_VERBATIM, new_file, new_lineno, |
b0d0794d | 967 | map_sysp); |
25266990 | 968 | } |
969 | ||
970 | /* Interpret the # 44 "file" [flags] notation, which has slightly | |
971 | different syntax and semantics from #line: Flags are allowed, | |
972 | and we never complain about the line number being too big. */ | |
973 | static void | |
f7fdd7a1 | 974 | do_linemarker (cpp_reader *pfile) |
25266990 | 975 | { |
dbddc569 | 976 | const struct line_maps *line_table = pfile->line_table; |
97bfb9ef | 977 | const struct line_map *map = LINEMAPS_LAST_ORDINARY_MAP (line_table); |
25266990 | 978 | const cpp_token *token; |
97bfb9ef | 979 | const char *new_file = ORDINARY_MAP_FILE_NAME (map); |
4999c35b | 980 | linenum_type new_lineno; |
97bfb9ef | 981 | unsigned int new_sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (map); |
1eecdb28 | 982 | enum lc_reason reason = LC_RENAME_VERBATIM; |
25266990 | 983 | int flag; |
98e29890 | 984 | bool wrapped; |
25266990 | 985 | |
986 | /* Back up so we can get the number again. Putting this in | |
987 | _cpp_handle_directive risks two calls to _cpp_backup_tokens in | |
988 | some circumstances, which can segfault. */ | |
989 | _cpp_backup_tokens (pfile, 1); | |
990 | ||
991 | /* #line commands expand macros. */ | |
992 | token = cpp_get_token (pfile); | |
993 | if (token->type != CPP_NUMBER | |
4999c35b | 994 | || strtolinenum (token->val.str.text, token->val.str.len, |
98e29890 | 995 | &new_lineno, &wrapped)) |
25266990 | 996 | { |
cde59b72 | 997 | /* Unlike #line, there does not seem to be a way to get an EOF |
998 | here. So, it should be safe to always spell the token. */ | |
d80d2074 | 999 | cpp_error (pfile, CPP_DL_ERROR, |
1000 | "\"%s\" after # is not a positive integer", | |
25266990 | 1001 | cpp_token_as_text (pfile, token)); |
1002 | return; | |
b1a9ff83 | 1003 | } |
616814f8 | 1004 | |
25266990 | 1005 | token = cpp_get_token (pfile); |
1006 | if (token->type == CPP_STRING) | |
1007 | { | |
ebc03810 | 1008 | cpp_string s = { 0, 0 }; |
7bc95b56 | 1009 | if (cpp_interpret_string_notranslate (pfile, &token->val.str, |
723ebaea | 1010 | 1, &s, CPP_STRING)) |
ebc03810 | 1011 | new_file = (const char *)s.text; |
787c3d1a | 1012 | |
25266990 | 1013 | new_sysp = 0; |
1014 | flag = read_flag (pfile, 0); | |
1015 | if (flag == 1) | |
1016 | { | |
1017 | reason = LC_ENTER; | |
1018 | /* Fake an include for cpp_included (). */ | |
1019 | _cpp_fake_include (pfile, new_file); | |
1020 | flag = read_flag (pfile, flag); | |
1021 | } | |
1022 | else if (flag == 2) | |
1023 | { | |
1024 | reason = LC_LEAVE; | |
1025 | flag = read_flag (pfile, flag); | |
1026 | } | |
1027 | if (flag == 3) | |
79bd622b | 1028 | { |
25266990 | 1029 | new_sysp = 1; |
1030 | flag = read_flag (pfile, flag); | |
1031 | if (flag == 4) | |
1032 | new_sysp = 2; | |
79bd622b | 1033 | } |
5d70627e | 1034 | pfile->buffer->sysp = new_sysp; |
25266990 | 1035 | |
6cda323a | 1036 | check_eol (pfile, false); |
f80e83a9 | 1037 | } |
f9b5f742 | 1038 | else if (token->type != CPP_EOF) |
d7503801 | 1039 | { |
d80d2074 | 1040 | cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", |
f9b5f742 | 1041 | cpp_token_as_text (pfile, token)); |
d7503801 | 1042 | return; |
1043 | } | |
1d6fa33f | 1044 | |
fb5ab82c | 1045 | skip_rest_of_line (pfile); |
5b500807 | 1046 | |
1047 | /* Compensate for the increment in linemap_add that occurs in | |
1048 | _cpp_do_file_change. We're currently at the start of the line | |
1049 | *following* the #line directive. A separate source_location for this | |
1050 | location makes no sense (until we do the LC_LEAVE), and | |
1051 | complicates LAST_SOURCE_LINE_LOCATION. */ | |
1052 | pfile->line_table->highest_location--; | |
1053 | ||
5a9f87bb | 1054 | _cpp_do_file_change (pfile, reason, new_file, new_lineno, new_sysp); |
d7503801 | 1055 | } |
1056 | ||
1ea7ed21 | 1057 | /* Arrange the file_change callback. pfile->line has changed to |
f85fcf2b | 1058 | FILE_LINE of TO_FILE, for reason REASON. SYSP is 1 for a system |
3fb1e43b | 1059 | header, 2 for a system header that needs to be extern "C" protected, |
f85fcf2b | 1060 | and zero otherwise. */ |
4087613d | 1061 | void |
f7fdd7a1 | 1062 | _cpp_do_file_change (cpp_reader *pfile, enum lc_reason reason, |
4999c35b | 1063 | const char *to_file, linenum_type file_line, |
f7fdd7a1 | 1064 | unsigned int sysp) |
d7503801 | 1065 | { |
610625e3 | 1066 | const struct line_map *map = linemap_add (pfile->line_table, reason, sysp, |
1067 | to_file, file_line); | |
dbddc569 | 1068 | if (map != NULL) |
97bfb9ef | 1069 | linemap_line_start (pfile->line_table, |
1070 | ORDINARY_MAP_STARTING_LINE_NUMBER (map), | |
1071 | 127); | |
38692459 | 1072 | |
4087613d | 1073 | if (pfile->cb.file_change) |
610625e3 | 1074 | pfile->cb.file_change (pfile, map); |
1d6fa33f | 1075 | } |
616814f8 | 1076 | |
e484a1cc | 1077 | /* Report a warning or error detected by the program we are |
1078 | processing. Use the directive's tokens in the error message. */ | |
69461e0d | 1079 | static void |
3a79f5da | 1080 | do_diagnostic (cpp_reader *pfile, int code, int reason, int print_dir) |
1d6fa33f | 1081 | { |
c0770282 | 1082 | const unsigned char *dir_name; |
1083 | unsigned char *line; | |
1084 | source_location src_loc = pfile->cur_token[-1].src_loc; | |
1085 | ||
1086 | if (print_dir) | |
1087 | dir_name = pfile->directive->name; | |
1088 | else | |
1089 | dir_name = NULL; | |
1090 | pfile->state.prevent_expansion++; | |
1091 | line = cpp_output_line_to_string (pfile, dir_name); | |
1092 | pfile->state.prevent_expansion--; | |
1093 | ||
3a79f5da | 1094 | if (code == CPP_DL_WARNING_SYSHDR && reason) |
1095 | cpp_warning_with_line_syshdr (pfile, reason, src_loc, 0, "%s", line); | |
1096 | else if (code == CPP_DL_WARNING && reason) | |
1097 | cpp_warning_with_line (pfile, reason, src_loc, 0, "%s", line); | |
1098 | else | |
1099 | cpp_error_with_line (pfile, code, src_loc, 0, "%s", line); | |
c0770282 | 1100 | free (line); |
1d6fa33f | 1101 | } |
1102 | ||
f3b83e9b | 1103 | static void |
f7fdd7a1 | 1104 | do_error (cpp_reader *pfile) |
f3b83e9b | 1105 | { |
3a79f5da | 1106 | do_diagnostic (pfile, CPP_DL_ERROR, 0, 1); |
f3b83e9b | 1107 | } |
1d6fa33f | 1108 | |
69461e0d | 1109 | static void |
f7fdd7a1 | 1110 | do_warning (cpp_reader *pfile) |
1d6fa33f | 1111 | { |
2ef5e3d3 | 1112 | /* We want #warning diagnostics to be emitted in system headers too. */ |
3a79f5da | 1113 | do_diagnostic (pfile, CPP_DL_WARNING_SYSHDR, CPP_W_WARNING_DIRECTIVE, 1); |
1d6fa33f | 1114 | } |
1115 | ||
4e29fcb2 | 1116 | /* Report program identification. */ |
69461e0d | 1117 | static void |
f7fdd7a1 | 1118 | do_ident (cpp_reader *pfile) |
1d6fa33f | 1119 | { |
f9b5f742 | 1120 | const cpp_token *str = cpp_get_token (pfile); |
6cae2504 | 1121 | |
f9b5f742 | 1122 | if (str->type != CPP_STRING) |
81e19b31 | 1123 | cpp_error (pfile, CPP_DL_ERROR, "invalid #%s directive", |
1124 | pfile->directive->name); | |
79bd622b | 1125 | else if (pfile->cb.ident) |
f7fdd7a1 | 1126 | pfile->cb.ident (pfile, pfile->directive_line, &str->val.str); |
4e29fcb2 | 1127 | |
6cda323a | 1128 | check_eol (pfile, false); |
1d6fa33f | 1129 | } |
1130 | ||
c6f14ce5 | 1131 | /* Lookup a PRAGMA name in a singly-linked CHAIN. Returns the |
1132 | matching entry, or NULL if none is found. The returned entry could | |
1133 | be the start of a namespace chain, or a pragma. */ | |
1134 | static struct pragma_entry * | |
f7fdd7a1 | 1135 | lookup_pragma_entry (struct pragma_entry *chain, const cpp_hashnode *pragma) |
3f075661 | 1136 | { |
5c43d212 | 1137 | while (chain && chain->pragma != pragma) |
1138 | chain = chain->next; | |
c6f14ce5 | 1139 | |
1140 | return chain; | |
1141 | } | |
1142 | ||
b75b98aa | 1143 | /* Create and insert a blank pragma entry at the beginning of a |
1144 | singly-linked CHAIN. */ | |
c6f14ce5 | 1145 | static struct pragma_entry * |
b75b98aa | 1146 | new_pragma_entry (cpp_reader *pfile, struct pragma_entry **chain) |
3f075661 | 1147 | { |
720aca92 | 1148 | struct pragma_entry *new_entry; |
6cae2504 | 1149 | |
720aca92 | 1150 | new_entry = (struct pragma_entry *) |
e6a5f963 | 1151 | _cpp_aligned_alloc (pfile, sizeof (struct pragma_entry)); |
6cae2504 | 1152 | |
b75b98aa | 1153 | memset (new_entry, 0, sizeof (struct pragma_entry)); |
720aca92 | 1154 | new_entry->next = *chain; |
b75b98aa | 1155 | |
720aca92 | 1156 | *chain = new_entry; |
1157 | return new_entry; | |
6cae2504 | 1158 | } |
3f075661 | 1159 | |
c6f14ce5 | 1160 | /* Register a pragma NAME in namespace SPACE. If SPACE is null, it |
b75b98aa | 1161 | goes in the global namespace. */ |
1162 | static struct pragma_entry * | |
1163 | register_pragma_1 (cpp_reader *pfile, const char *space, const char *name, | |
1164 | bool allow_name_expansion) | |
3f075661 | 1165 | { |
c6f14ce5 | 1166 | struct pragma_entry **chain = &pfile->pragmas; |
1167 | struct pragma_entry *entry; | |
5c43d212 | 1168 | const cpp_hashnode *node; |
c6f14ce5 | 1169 | |
c6f14ce5 | 1170 | if (space) |
6cae2504 | 1171 | { |
924bbf02 | 1172 | node = cpp_lookup (pfile, UC space, strlen (space)); |
5c43d212 | 1173 | entry = lookup_pragma_entry (*chain, node); |
c6f14ce5 | 1174 | if (!entry) |
b75b98aa | 1175 | { |
1176 | entry = new_pragma_entry (pfile, chain); | |
1177 | entry->pragma = node; | |
1178 | entry->is_nspace = true; | |
1179 | entry->allow_expansion = allow_name_expansion; | |
1180 | } | |
c6f14ce5 | 1181 | else if (!entry->is_nspace) |
1182 | goto clash; | |
b75b98aa | 1183 | else if (entry->allow_expansion != allow_name_expansion) |
1184 | { | |
1185 | cpp_error (pfile, CPP_DL_ICE, | |
1186 | "registering pragmas in namespace \"%s\" with mismatched " | |
1187 | "name expansion", space); | |
1188 | return NULL; | |
1189 | } | |
c6f14ce5 | 1190 | chain = &entry->u.space; |
6cae2504 | 1191 | } |
b75b98aa | 1192 | else if (allow_name_expansion) |
1193 | { | |
1194 | cpp_error (pfile, CPP_DL_ICE, | |
1195 | "registering pragma \"%s\" with name expansion " | |
1196 | "and no namespace", name); | |
1197 | return NULL; | |
1198 | } | |
6cae2504 | 1199 | |
c6f14ce5 | 1200 | /* Check for duplicates. */ |
924bbf02 | 1201 | node = cpp_lookup (pfile, UC name, strlen (name)); |
5c43d212 | 1202 | entry = lookup_pragma_entry (*chain, node); |
b75b98aa | 1203 | if (entry == NULL) |
c6f14ce5 | 1204 | { |
b75b98aa | 1205 | entry = new_pragma_entry (pfile, chain); |
1206 | entry->pragma = node; | |
1207 | return entry; | |
c6f14ce5 | 1208 | } |
b75b98aa | 1209 | |
1210 | if (entry->is_nspace) | |
1211 | clash: | |
1212 | cpp_error (pfile, CPP_DL_ICE, | |
1213 | "registering \"%s\" as both a pragma and a pragma namespace", | |
1214 | NODE_NAME (node)); | |
1215 | else if (space) | |
1216 | cpp_error (pfile, CPP_DL_ICE, "#pragma %s %s is already registered", | |
1217 | space, name); | |
c6f14ce5 | 1218 | else |
b75b98aa | 1219 | cpp_error (pfile, CPP_DL_ICE, "#pragma %s is already registered", name); |
1220 | ||
1221 | return NULL; | |
1222 | } | |
1223 | ||
1224 | /* Register a cpplib internal pragma SPACE NAME with HANDLER. */ | |
1225 | static void | |
1226 | register_pragma_internal (cpp_reader *pfile, const char *space, | |
1227 | const char *name, pragma_cb handler) | |
1228 | { | |
1229 | struct pragma_entry *entry; | |
1230 | ||
1231 | entry = register_pragma_1 (pfile, space, name, false); | |
1232 | entry->is_internal = true; | |
1233 | entry->u.handler = handler; | |
d6d3c909 | 1234 | } |
1235 | ||
1236 | /* Register a pragma NAME in namespace SPACE. If SPACE is null, it | |
1237 | goes in the global namespace. HANDLER is the handler it will call, | |
68bf2ad9 | 1238 | which must be non-NULL. If ALLOW_EXPANSION is set, allow macro |
1239 | expansion while parsing pragma NAME. This function is exported | |
1240 | from libcpp. */ | |
d6d3c909 | 1241 | void |
1242 | cpp_register_pragma (cpp_reader *pfile, const char *space, const char *name, | |
68bf2ad9 | 1243 | pragma_cb handler, bool allow_expansion) |
d6d3c909 | 1244 | { |
b75b98aa | 1245 | struct pragma_entry *entry; |
1246 | ||
1247 | if (!handler) | |
1248 | { | |
1249 | cpp_error (pfile, CPP_DL_ICE, "registering pragma with NULL handler"); | |
1250 | return; | |
1251 | } | |
1252 | ||
1253 | entry = register_pragma_1 (pfile, space, name, false); | |
1254 | if (entry) | |
1255 | { | |
1256 | entry->allow_expansion = allow_expansion; | |
1257 | entry->u.handler = handler; | |
1258 | } | |
6cae2504 | 1259 | } |
c6f14ce5 | 1260 | |
b75b98aa | 1261 | /* Similarly, but create mark the pragma for deferred processing. |
1262 | When found, a CPP_PRAGMA token will be insertted into the stream | |
1263 | with IDENT in the token->u.pragma slot. */ | |
1264 | void | |
1265 | cpp_register_deferred_pragma (cpp_reader *pfile, const char *space, | |
1266 | const char *name, unsigned int ident, | |
1267 | bool allow_expansion, bool allow_name_expansion) | |
1268 | { | |
1269 | struct pragma_entry *entry; | |
1270 | ||
1271 | entry = register_pragma_1 (pfile, space, name, allow_name_expansion); | |
1272 | if (entry) | |
1273 | { | |
1274 | entry->is_deferred = true; | |
1275 | entry->allow_expansion = allow_expansion; | |
1276 | entry->u.ident = ident; | |
1277 | } | |
1278 | } | |
1279 | ||
c6f14ce5 | 1280 | /* Register the pragmas the preprocessor itself handles. */ |
6cae2504 | 1281 | void |
f7fdd7a1 | 1282 | _cpp_init_internal_pragmas (cpp_reader *pfile) |
6cae2504 | 1283 | { |
c6f14ce5 | 1284 | /* Pragmas in the global namespace. */ |
b75b98aa | 1285 | register_pragma_internal (pfile, 0, "once", do_pragma_once); |
038c21f1 | 1286 | register_pragma_internal (pfile, 0, "push_macro", do_pragma_push_macro); |
1287 | register_pragma_internal (pfile, 0, "pop_macro", do_pragma_pop_macro); | |
6cae2504 | 1288 | |
c6f14ce5 | 1289 | /* New GCC-specific pragmas should be put in the GCC namespace. */ |
b75b98aa | 1290 | register_pragma_internal (pfile, "GCC", "poison", do_pragma_poison); |
1291 | register_pragma_internal (pfile, "GCC", "system_header", | |
1292 | do_pragma_system_header); | |
1293 | register_pragma_internal (pfile, "GCC", "dependency", do_pragma_dependency); | |
a1f1781a | 1294 | register_pragma_internal (pfile, "GCC", "warning", do_pragma_warning); |
1295 | register_pragma_internal (pfile, "GCC", "error", do_pragma_error); | |
3f075661 | 1296 | } |
1d6fa33f | 1297 | |
573aba85 | 1298 | /* Return the number of registered pragmas in PE. */ |
1299 | ||
1300 | static int | |
f7fdd7a1 | 1301 | count_registered_pragmas (struct pragma_entry *pe) |
573aba85 | 1302 | { |
1303 | int ct = 0; | |
1304 | for (; pe != NULL; pe = pe->next) | |
1305 | { | |
1306 | if (pe->is_nspace) | |
1307 | ct += count_registered_pragmas (pe->u.space); | |
1308 | ct++; | |
1309 | } | |
1310 | return ct; | |
1311 | } | |
1312 | ||
1313 | /* Save into SD the names of the registered pragmas referenced by PE, | |
1314 | and return a pointer to the next free space in SD. */ | |
1315 | ||
1316 | static char ** | |
f7fdd7a1 | 1317 | save_registered_pragmas (struct pragma_entry *pe, char **sd) |
573aba85 | 1318 | { |
1319 | for (; pe != NULL; pe = pe->next) | |
1320 | { | |
1321 | if (pe->is_nspace) | |
1322 | sd = save_registered_pragmas (pe->u.space, sd); | |
720aca92 | 1323 | *sd++ = (char *) xmemdup (HT_STR (&pe->pragma->ident), |
1324 | HT_LEN (&pe->pragma->ident), | |
1325 | HT_LEN (&pe->pragma->ident) + 1); | |
573aba85 | 1326 | } |
1327 | return sd; | |
1328 | } | |
1329 | ||
1330 | /* Return a newly-allocated array which saves the names of the | |
1331 | registered pragmas. */ | |
1332 | ||
1333 | char ** | |
f7fdd7a1 | 1334 | _cpp_save_pragma_names (cpp_reader *pfile) |
573aba85 | 1335 | { |
1336 | int ct = count_registered_pragmas (pfile->pragmas); | |
3b298764 | 1337 | char **result = XNEWVEC (char *, ct); |
573aba85 | 1338 | (void) save_registered_pragmas (pfile->pragmas, result); |
1339 | return result; | |
1340 | } | |
1341 | ||
1342 | /* Restore from SD the names of the registered pragmas referenced by PE, | |
1343 | and return a pointer to the next unused name in SD. */ | |
1344 | ||
1345 | static char ** | |
f7fdd7a1 | 1346 | restore_registered_pragmas (cpp_reader *pfile, struct pragma_entry *pe, |
1347 | char **sd) | |
573aba85 | 1348 | { |
1349 | for (; pe != NULL; pe = pe->next) | |
1350 | { | |
1351 | if (pe->is_nspace) | |
1352 | sd = restore_registered_pragmas (pfile, pe->u.space, sd); | |
924bbf02 | 1353 | pe->pragma = cpp_lookup (pfile, UC *sd, strlen (*sd)); |
573aba85 | 1354 | free (*sd); |
1355 | sd++; | |
1356 | } | |
1357 | return sd; | |
1358 | } | |
1359 | ||
1360 | /* Restore the names of the registered pragmas from SAVED. */ | |
1361 | ||
1362 | void | |
f7fdd7a1 | 1363 | _cpp_restore_pragma_names (cpp_reader *pfile, char **saved) |
573aba85 | 1364 | { |
1365 | (void) restore_registered_pragmas (pfile, pfile->pragmas, saved); | |
1366 | free (saved); | |
1367 | } | |
1368 | ||
c6f14ce5 | 1369 | /* Pragmata handling. We handle some, and pass the rest on to the |
1370 | front end. C99 defines three pragmas and says that no macro | |
1371 | expansion is to be performed on them; whether or not macro | |
1372 | expansion happens for other pragmas is implementation defined. | |
b75b98aa | 1373 | This implementation allows for a mix of both, since GCC did not |
1374 | traditionally macro expand its (few) pragmas, whereas OpenMP | |
1375 | specifies that macro expansion should happen. */ | |
69461e0d | 1376 | static void |
f7fdd7a1 | 1377 | do_pragma (cpp_reader *pfile) |
1d6fa33f | 1378 | { |
c6f14ce5 | 1379 | const struct pragma_entry *p = NULL; |
307df3d0 | 1380 | const cpp_token *token, *pragma_token; |
1381 | source_location pragma_token_virt_loc = 0; | |
add258d7 | 1382 | cpp_token ns_token; |
c6f14ce5 | 1383 | unsigned int count = 1; |
2e398cc7 | 1384 | |
79bd622b | 1385 | pfile->state.prevent_expansion++; |
6cae2504 | 1386 | |
307df3d0 | 1387 | pragma_token = token = cpp_get_token_with_location (pfile, |
1388 | &pragma_token_virt_loc); | |
add258d7 | 1389 | ns_token = *token; |
f9b5f742 | 1390 | if (token->type == CPP_NAME) |
c0b823af | 1391 | { |
2ee04baa | 1392 | p = lookup_pragma_entry (pfile->pragmas, token->val.node.node); |
c6f14ce5 | 1393 | if (p && p->is_nspace) |
6cae2504 | 1394 | { |
b75b98aa | 1395 | bool allow_name_expansion = p->allow_expansion; |
1396 | if (allow_name_expansion) | |
8c6425eb | 1397 | pfile->state.prevent_expansion--; |
2c694d44 | 1398 | |
c6f14ce5 | 1399 | token = cpp_get_token (pfile); |
1400 | if (token->type == CPP_NAME) | |
2ee04baa | 1401 | p = lookup_pragma_entry (p->u.space, token->val.node.node); |
c6f14ce5 | 1402 | else |
1403 | p = NULL; | |
b75b98aa | 1404 | if (allow_name_expansion) |
1405 | pfile->state.prevent_expansion++; | |
1406 | count = 2; | |
6cae2504 | 1407 | } |
6cae2504 | 1408 | } |
f80e83a9 | 1409 | |
a095c1b5 | 1410 | if (p) |
9b3d6630 | 1411 | { |
b75b98aa | 1412 | if (p->is_deferred) |
1413 | { | |
307df3d0 | 1414 | pfile->directive_result.src_loc = pragma_token_virt_loc; |
b75b98aa | 1415 | pfile->directive_result.type = CPP_PRAGMA; |
1416 | pfile->directive_result.flags = pragma_token->flags; | |
1417 | pfile->directive_result.val.pragma = p->u.ident; | |
1418 | pfile->state.in_deferred_pragma = true; | |
1419 | pfile->state.pragma_allow_expansion = p->allow_expansion; | |
1420 | if (!p->allow_expansion) | |
1421 | pfile->state.prevent_expansion++; | |
1422 | } | |
1423 | else | |
a095c1b5 | 1424 | { |
b75b98aa | 1425 | /* Since the handler below doesn't get the line number, that |
1426 | it might need for diagnostics, make sure it has the right | |
a095c1b5 | 1427 | numbers in place. */ |
1428 | if (pfile->cb.line_change) | |
1429 | (*pfile->cb.line_change) (pfile, pragma_token, false); | |
b75b98aa | 1430 | if (p->allow_expansion) |
68bf2ad9 | 1431 | pfile->state.prevent_expansion--; |
a095c1b5 | 1432 | (*p->u.handler) (pfile); |
b75b98aa | 1433 | if (p->allow_expansion) |
68bf2ad9 | 1434 | pfile->state.prevent_expansion++; |
a095c1b5 | 1435 | } |
d6d3c909 | 1436 | } |
38692459 | 1437 | else if (pfile->cb.def_pragma) |
fb5ab82c | 1438 | { |
add258d7 | 1439 | if (count == 1 || pfile->context->prev == NULL) |
1440 | _cpp_backup_tokens (pfile, count); | |
1441 | else | |
1442 | { | |
1443 | /* Invalid name comes from macro expansion, _cpp_backup_tokens | |
1444 | won't allow backing 2 tokens. */ | |
1445 | /* ??? The token buffer is leaked. Perhaps if def_pragma hook | |
1446 | reads both tokens, we could perhaps free it, but if it doesn't, | |
1447 | we don't know the exact lifespan. */ | |
1448 | cpp_token *toks = XNEWVEC (cpp_token, 2); | |
1449 | toks[0] = ns_token; | |
1450 | toks[0].flags |= NO_EXPAND; | |
1451 | toks[1] = *token; | |
1452 | toks[1].flags |= NO_EXPAND; | |
1453 | _cpp_push_token_context (pfile, NULL, toks, 2); | |
1454 | } | |
f7fdd7a1 | 1455 | pfile->cb.def_pragma (pfile, pfile->directive_line); |
fb5ab82c | 1456 | } |
c6f14ce5 | 1457 | |
5621a364 | 1458 | pfile->state.prevent_expansion--; |
3f075661 | 1459 | } |
1460 | ||
e484a1cc | 1461 | /* Handle #pragma once. */ |
6cae2504 | 1462 | static void |
f7fdd7a1 | 1463 | do_pragma_once (cpp_reader *pfile) |
4e29fcb2 | 1464 | { |
927b511f | 1465 | if (cpp_in_primary_file (pfile)) |
d80d2074 | 1466 | cpp_error (pfile, CPP_DL_WARNING, "#pragma once in main file"); |
79bd622b | 1467 | |
6cda323a | 1468 | check_eol (pfile, false); |
68faebf4 | 1469 | _cpp_mark_file_once_only (pfile, pfile->buffer->file); |
4e29fcb2 | 1470 | } |
c9d838e1 | 1471 | |
038c21f1 | 1472 | /* Handle #pragma push_macro(STRING). */ |
1473 | static void | |
1474 | do_pragma_push_macro (cpp_reader *pfile) | |
1475 | { | |
0d601ff4 | 1476 | cpp_hashnode *node; |
1477 | size_t defnlen; | |
1478 | const uchar *defn = NULL; | |
038c21f1 | 1479 | char *macroname, *dest; |
1480 | const char *limit, *src; | |
1481 | const cpp_token *txt; | |
1482 | struct def_pragma_macro *c; | |
1483 | ||
1484 | txt = get__Pragma_string (pfile); | |
1485 | if (!txt) | |
1486 | { | |
1487 | source_location src_loc = pfile->cur_token[-1].src_loc; | |
1488 | cpp_error_with_line (pfile, CPP_DL_ERROR, src_loc, 0, | |
1489 | "invalid #pragma push_macro directive"); | |
1490 | check_eol (pfile, false); | |
1491 | skip_rest_of_line (pfile); | |
1492 | return; | |
1493 | } | |
1494 | dest = macroname = (char *) alloca (txt->val.str.len + 2); | |
1495 | src = (const char *) (txt->val.str.text + 1 + (txt->val.str.text[0] == 'L')); | |
1496 | limit = (const char *) (txt->val.str.text + txt->val.str.len - 1); | |
1497 | while (src < limit) | |
1498 | { | |
1499 | /* We know there is a character following the backslash. */ | |
1500 | if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
1501 | src++; | |
1502 | *dest++ = *src++; | |
1503 | } | |
1504 | *dest = 0; | |
1505 | check_eol (pfile, false); | |
1506 | skip_rest_of_line (pfile); | |
1507 | c = XNEW (struct def_pragma_macro); | |
0d601ff4 | 1508 | memset (c, 0, sizeof (struct def_pragma_macro)); |
038c21f1 | 1509 | c->name = XNEWVAR (char, strlen (macroname) + 1); |
1510 | strcpy (c->name, macroname); | |
1511 | c->next = pfile->pushed_macros; | |
0d601ff4 | 1512 | node = _cpp_lex_identifier (pfile, c->name); |
1513 | if (node->type == NT_VOID) | |
1514 | c->is_undef = 1; | |
1515 | else | |
1516 | { | |
1517 | defn = cpp_macro_definition (pfile, node); | |
1518 | defnlen = ustrlen (defn); | |
1519 | c->definition = XNEWVEC (uchar, defnlen + 2); | |
1520 | c->definition[defnlen] = '\n'; | |
1521 | c->definition[defnlen + 1] = 0; | |
1522 | c->line = node->value.macro->line; | |
1523 | c->syshdr = node->value.macro->syshdr; | |
1524 | c->used = node->value.macro->used; | |
1525 | memcpy (c->definition, defn, defnlen); | |
1526 | } | |
1527 | ||
038c21f1 | 1528 | pfile->pushed_macros = c; |
1529 | } | |
1530 | ||
1531 | /* Handle #pragma pop_macro(STRING). */ | |
1532 | static void | |
1533 | do_pragma_pop_macro (cpp_reader *pfile) | |
1534 | { | |
1535 | char *macroname, *dest; | |
1536 | const char *limit, *src; | |
1537 | const cpp_token *txt; | |
1538 | struct def_pragma_macro *l = NULL, *c = pfile->pushed_macros; | |
1539 | txt = get__Pragma_string (pfile); | |
1540 | if (!txt) | |
1541 | { | |
1542 | source_location src_loc = pfile->cur_token[-1].src_loc; | |
1543 | cpp_error_with_line (pfile, CPP_DL_ERROR, src_loc, 0, | |
1544 | "invalid #pragma pop_macro directive"); | |
1545 | check_eol (pfile, false); | |
1546 | skip_rest_of_line (pfile); | |
1547 | return; | |
1548 | } | |
1549 | dest = macroname = (char *) alloca (txt->val.str.len + 2); | |
1550 | src = (const char *) (txt->val.str.text + 1 + (txt->val.str.text[0] == 'L')); | |
1551 | limit = (const char *) (txt->val.str.text + txt->val.str.len - 1); | |
1552 | while (src < limit) | |
1553 | { | |
1554 | /* We know there is a character following the backslash. */ | |
1555 | if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
1556 | src++; | |
1557 | *dest++ = *src++; | |
1558 | } | |
1559 | *dest = 0; | |
1560 | check_eol (pfile, false); | |
1561 | skip_rest_of_line (pfile); | |
1562 | ||
1563 | while (c != NULL) | |
1564 | { | |
1565 | if (!strcmp (c->name, macroname)) | |
1566 | { | |
1567 | if (!l) | |
1568 | pfile->pushed_macros = c->next; | |
1569 | else | |
1570 | l->next = c->next; | |
0d601ff4 | 1571 | cpp_pop_definition (pfile, c); |
1572 | free (c->definition); | |
038c21f1 | 1573 | free (c->name); |
1574 | free (c); | |
1575 | break; | |
1576 | } | |
1577 | l = c; | |
1578 | c = c->next; | |
1579 | } | |
1580 | } | |
1581 | ||
8e1db61c | 1582 | /* Handle #pragma GCC poison, to poison one or more identifiers so |
1583 | that the lexer produces a hard error for each subsequent usage. */ | |
6cae2504 | 1584 | static void |
f7fdd7a1 | 1585 | do_pragma_poison (cpp_reader *pfile) |
4e29fcb2 | 1586 | { |
c00e481c | 1587 | const cpp_token *tok; |
c4abf88d | 1588 | cpp_hashnode *hp; |
4e29fcb2 | 1589 | |
79bd622b | 1590 | pfile->state.poisoned_ok = 1; |
4e29fcb2 | 1591 | for (;;) |
1592 | { | |
c00e481c | 1593 | tok = _cpp_lex_token (pfile); |
1594 | if (tok->type == CPP_EOF) | |
4e29fcb2 | 1595 | break; |
c00e481c | 1596 | if (tok->type != CPP_NAME) |
c9d838e1 | 1597 | { |
d80d2074 | 1598 | cpp_error (pfile, CPP_DL_ERROR, |
1599 | "invalid #pragma GCC poison directive"); | |
79bd622b | 1600 | break; |
c9d838e1 | 1601 | } |
1602 | ||
2ee04baa | 1603 | hp = tok->val.node.node; |
79bd622b | 1604 | if (hp->flags & NODE_POISONED) |
1605 | continue; | |
1606 | ||
1607 | if (hp->type == NT_MACRO) | |
d80d2074 | 1608 | cpp_error (pfile, CPP_DL_WARNING, "poisoning existing macro \"%s\"", |
73328dce | 1609 | NODE_NAME (hp)); |
79bd622b | 1610 | _cpp_free_definition (hp); |
1611 | hp->flags |= NODE_POISONED | NODE_DIAGNOSTIC; | |
c9d838e1 | 1612 | } |
79bd622b | 1613 | pfile->state.poisoned_ok = 0; |
1d6fa33f | 1614 | } |
e35f919d | 1615 | |
1616 | /* Mark the current header as a system header. This will suppress | |
1617 | some categories of warnings (notably those from -pedantic). It is | |
1618 | intended for use in system libraries that cannot be implemented in | |
1619 | conforming C, but cannot be certain that their headers appear in a | |
1620 | system include directory. To prevent abuse, it is rejected in the | |
1621 | primary source file. */ | |
6cae2504 | 1622 | static void |
f7fdd7a1 | 1623 | do_pragma_system_header (cpp_reader *pfile) |
e35f919d | 1624 | { |
927b511f | 1625 | if (cpp_in_primary_file (pfile)) |
d80d2074 | 1626 | cpp_error (pfile, CPP_DL_WARNING, |
73328dce | 1627 | "#pragma system_header ignored outside include file"); |
e35f919d | 1628 | else |
38692459 | 1629 | { |
6cda323a | 1630 | check_eol (pfile, false); |
fb5ab82c | 1631 | skip_rest_of_line (pfile); |
38692459 | 1632 | cpp_make_system_header (pfile, 1, 0); |
1633 | } | |
e35f919d | 1634 | } |
e485814b | 1635 | |
1636 | /* Check the modified date of the current include file against a specified | |
1637 | file. Issue a diagnostic, if the specified file is newer. We use this to | |
1638 | determine if a fixed header should be refixed. */ | |
6cae2504 | 1639 | static void |
f7fdd7a1 | 1640 | do_pragma_dependency (cpp_reader *pfile) |
e485814b | 1641 | { |
58efbd5a | 1642 | const char *fname; |
1643 | int angle_brackets, ordering; | |
78ed8e3d | 1644 | source_location location; |
b1a9ff83 | 1645 | |
78ed8e3d | 1646 | fname = parse_include (pfile, &angle_brackets, NULL, &location); |
58efbd5a | 1647 | if (!fname) |
6cae2504 | 1648 | return; |
f80e83a9 | 1649 | |
58efbd5a | 1650 | ordering = _cpp_compare_file_date (pfile, fname, angle_brackets); |
e485814b | 1651 | if (ordering < 0) |
d80d2074 | 1652 | cpp_error (pfile, CPP_DL_WARNING, "cannot find source file %s", fname); |
e485814b | 1653 | else if (ordering > 0) |
1654 | { | |
d80d2074 | 1655 | cpp_error (pfile, CPP_DL_WARNING, |
1656 | "current file is older than %s", fname); | |
f9b5f742 | 1657 | if (cpp_get_token (pfile)->type != CPP_EOF) |
fb5ab82c | 1658 | { |
1659 | _cpp_backup_tokens (pfile, 1); | |
3a79f5da | 1660 | do_diagnostic (pfile, CPP_DL_WARNING, 0, 0); |
fb5ab82c | 1661 | } |
e485814b | 1662 | } |
58efbd5a | 1663 | |
b9a7cc69 | 1664 | free ((void *) fname); |
e485814b | 1665 | } |
1666 | ||
a1f1781a | 1667 | /* Issue a diagnostic with the message taken from the pragma. If |
1668 | ERROR is true, the diagnostic is a warning, otherwise, it is an | |
1669 | error. */ | |
1670 | static void | |
1671 | do_pragma_warning_or_error (cpp_reader *pfile, bool error) | |
1672 | { | |
1673 | const cpp_token *tok = _cpp_lex_token (pfile); | |
1674 | cpp_string str; | |
1675 | if (tok->type != CPP_STRING | |
1676 | || !cpp_interpret_string_notranslate (pfile, &tok->val.str, 1, &str, | |
1677 | CPP_STRING) | |
1678 | || str.len == 0) | |
1679 | { | |
1680 | cpp_error (pfile, CPP_DL_ERROR, "invalid \"#pragma GCC %s\" directive", | |
1681 | error ? "error" : "warning"); | |
1682 | return; | |
1683 | } | |
1684 | cpp_error (pfile, error ? CPP_DL_ERROR : CPP_DL_WARNING, | |
1685 | "%s", str.text); | |
1686 | free ((void *)str.text); | |
1687 | } | |
1688 | ||
1689 | /* Issue a warning diagnostic. */ | |
1690 | static void | |
1691 | do_pragma_warning (cpp_reader *pfile) | |
1692 | { | |
1693 | do_pragma_warning_or_error (pfile, false); | |
1694 | } | |
1695 | ||
1696 | /* Issue an error diagnostic. */ | |
1697 | static void | |
1698 | do_pragma_error (cpp_reader *pfile) | |
1699 | { | |
1700 | do_pragma_warning_or_error (pfile, true); | |
1701 | } | |
1702 | ||
f9b5f742 | 1703 | /* Get a token but skip padding. */ |
1704 | static const cpp_token * | |
f7fdd7a1 | 1705 | get_token_no_padding (cpp_reader *pfile) |
396ffa86 | 1706 | { |
f9b5f742 | 1707 | for (;;) |
1708 | { | |
1709 | const cpp_token *result = cpp_get_token (pfile); | |
1710 | if (result->type != CPP_PADDING) | |
1711 | return result; | |
1712 | } | |
1713 | } | |
396ffa86 | 1714 | |
f9b5f742 | 1715 | /* Check syntax is "(string-literal)". Returns the string on success, |
1716 | or NULL on failure. */ | |
1717 | static const cpp_token * | |
f7fdd7a1 | 1718 | get__Pragma_string (cpp_reader *pfile) |
f9b5f742 | 1719 | { |
1720 | const cpp_token *string; | |
2d507e67 | 1721 | const cpp_token *paren; |
396ffa86 | 1722 | |
2d507e67 | 1723 | paren = get_token_no_padding (pfile); |
1724 | if (paren->type == CPP_EOF) | |
1725 | _cpp_backup_tokens (pfile, 1); | |
1726 | if (paren->type != CPP_OPEN_PAREN) | |
f9b5f742 | 1727 | return NULL; |
1728 | ||
1729 | string = get_token_no_padding (pfile); | |
2d507e67 | 1730 | if (string->type == CPP_EOF) |
1731 | _cpp_backup_tokens (pfile, 1); | |
924bbf02 | 1732 | if (string->type != CPP_STRING && string->type != CPP_WSTRING |
538ba11a | 1733 | && string->type != CPP_STRING32 && string->type != CPP_STRING16 |
1734 | && string->type != CPP_UTF8STRING) | |
f9b5f742 | 1735 | return NULL; |
1736 | ||
2d507e67 | 1737 | paren = get_token_no_padding (pfile); |
1738 | if (paren->type == CPP_EOF) | |
1739 | _cpp_backup_tokens (pfile, 1); | |
1740 | if (paren->type != CPP_CLOSE_PAREN) | |
f9b5f742 | 1741 | return NULL; |
396ffa86 | 1742 | |
f9b5f742 | 1743 | return string; |
396ffa86 | 1744 | } |
1745 | ||
1e0ef2fd | 1746 | /* Destringize IN into a temporary buffer, by removing the first \ of |
1747 | \" and \\ sequences, and process the result as a #pragma directive. */ | |
1748 | static void | |
f7fdd7a1 | 1749 | destringize_and_run (cpp_reader *pfile, const cpp_string *in) |
396ffa86 | 1750 | { |
1751 | const unsigned char *src, *limit; | |
1e0ef2fd | 1752 | char *dest, *result; |
b75b98aa | 1753 | cpp_context *saved_context; |
1754 | cpp_token *saved_cur_token; | |
1755 | tokenrun *saved_cur_run; | |
1756 | cpp_token *toks; | |
1757 | int count; | |
8302ff7f | 1758 | const struct directive *save_directive; |
396ffa86 | 1759 | |
720aca92 | 1760 | dest = result = (char *) alloca (in->len - 1); |
4970d4c2 | 1761 | src = in->text + 1 + (in->text[0] == 'L'); |
1762 | limit = in->text + in->len - 1; | |
1763 | while (src < limit) | |
396ffa86 | 1764 | { |
1765 | /* We know there is a character following the backslash. */ | |
1766 | if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
1767 | src++; | |
1768 | *dest++ = *src++; | |
1769 | } | |
a54e0bf8 | 1770 | *dest = '\n'; |
396ffa86 | 1771 | |
6e5ef531 | 1772 | /* Ugh; an awful kludge. We are really not set up to be lexing |
1773 | tokens when in the middle of a macro expansion. Use a new | |
1774 | context to force cpp_get_token to lex, and so skip_rest_of_line | |
1775 | doesn't go beyond the end of the text. Also, remember the | |
1776 | current lexing position so we can return to it later. | |
1777 | ||
1778 | Something like line-at-a-time lexing should remove the need for | |
1779 | this. */ | |
b75b98aa | 1780 | saved_context = pfile->context; |
1781 | saved_cur_token = pfile->cur_token; | |
1782 | saved_cur_run = pfile->cur_run; | |
878d9b47 | 1783 | |
6cfa7465 | 1784 | pfile->context = XCNEW (cpp_context); |
878d9b47 | 1785 | |
b75b98aa | 1786 | /* Inline run_directive, since we need to delay the _cpp_pop_buffer |
1787 | until we've read all of the tokens that we want. */ | |
1788 | cpp_push_buffer (pfile, (const uchar *) result, dest - result, | |
1789 | /* from_stage3 */ true); | |
1790 | /* ??? Antique Disgusting Hack. What does this do? */ | |
1791 | if (pfile->buffer->prev) | |
1792 | pfile->buffer->file = pfile->buffer->prev->file; | |
878d9b47 | 1793 | |
b75b98aa | 1794 | start_directive (pfile); |
1795 | _cpp_clean_line (pfile); | |
8302ff7f | 1796 | save_directive = pfile->directive; |
1797 | pfile->directive = &dtable[T_PRAGMA]; | |
b75b98aa | 1798 | do_pragma (pfile); |
1799 | end_directive (pfile, 1); | |
8302ff7f | 1800 | pfile->directive = save_directive; |
878d9b47 | 1801 | |
b75b98aa | 1802 | /* We always insert at least one token, the directive result. It'll |
1803 | either be a CPP_PADDING or a CPP_PRAGMA. In the later case, we | |
1804 | need to insert *all* of the tokens, including the CPP_PRAGMA_EOL. */ | |
1805 | ||
1806 | /* If we're not handling the pragma internally, read all of the tokens from | |
1807 | the string buffer now, while the string buffer is still installed. */ | |
1808 | /* ??? Note that the token buffer allocated here is leaked. It's not clear | |
1809 | to me what the true lifespan of the tokens are. It would appear that | |
1810 | the lifespan is the entire parse of the main input stream, in which case | |
1811 | this may not be wrong. */ | |
1812 | if (pfile->directive_result.type == CPP_PRAGMA) | |
1813 | { | |
1814 | int maxcount; | |
1815 | ||
1816 | count = 1; | |
1817 | maxcount = 50; | |
1818 | toks = XNEWVEC (cpp_token, maxcount); | |
1819 | toks[0] = pfile->directive_result; | |
878d9b47 | 1820 | |
b75b98aa | 1821 | do |
1822 | { | |
1823 | if (count == maxcount) | |
1824 | { | |
1825 | maxcount = maxcount * 3 / 2; | |
1826 | toks = XRESIZEVEC (cpp_token, toks, maxcount); | |
1827 | } | |
add258d7 | 1828 | toks[count] = *cpp_get_token (pfile); |
1829 | /* Macros have been already expanded by cpp_get_token | |
1830 | if the pragma allowed expansion. */ | |
1831 | toks[count++].flags |= NO_EXPAND; | |
b75b98aa | 1832 | } |
1833 | while (toks[count-1].type != CPP_PRAGMA_EOL); | |
1834 | } | |
1835 | else | |
1836 | { | |
1837 | count = 1; | |
1838 | toks = XNEW (cpp_token); | |
1839 | toks[0] = pfile->directive_result; | |
1840 | ||
1841 | /* If we handled the entire pragma internally, make sure we get the | |
1842 | line number correct for the next token. */ | |
1843 | if (pfile->cb.line_change) | |
1844 | pfile->cb.line_change (pfile, pfile->cur_token, false); | |
1845 | } | |
1846 | ||
1847 | /* Finish inlining run_directive. */ | |
1848 | pfile->buffer->file = NULL; | |
1849 | _cpp_pop_buffer (pfile); | |
1850 | ||
1851 | /* Reset the old macro state before ... */ | |
1852 | XDELETE (pfile->context); | |
1853 | pfile->context = saved_context; | |
1854 | pfile->cur_token = saved_cur_token; | |
1855 | pfile->cur_run = saved_cur_run; | |
1856 | ||
1857 | /* ... inserting the new tokens we collected. */ | |
1858 | _cpp_push_token_context (pfile, NULL, toks, count); | |
396ffa86 | 1859 | } |
1860 | ||
2d507e67 | 1861 | /* Handle the _Pragma operator. Return 0 on error, 1 if ok. */ |
1862 | int | |
f7fdd7a1 | 1863 | _cpp_do__Pragma (cpp_reader *pfile) |
396ffa86 | 1864 | { |
f9b5f742 | 1865 | const cpp_token *string = get__Pragma_string (pfile); |
d6d3c909 | 1866 | pfile->directive_result.type = CPP_PADDING; |
396ffa86 | 1867 | |
878d9b47 | 1868 | if (string) |
2d507e67 | 1869 | { |
1870 | destringize_and_run (pfile, &string->val.str); | |
1871 | return 1; | |
1872 | } | |
1873 | cpp_error (pfile, CPP_DL_ERROR, | |
1874 | "_Pragma takes a parenthesized string literal"); | |
1875 | return 0; | |
396ffa86 | 1876 | } |
d6d3c909 | 1877 | |
e484a1cc | 1878 | /* Handle #ifdef. */ |
69461e0d | 1879 | static void |
f7fdd7a1 | 1880 | do_ifdef (cpp_reader *pfile) |
4bf559f2 | 1881 | { |
79bd622b | 1882 | int skip = 1; |
f80e83a9 | 1883 | |
5e878517 | 1884 | if (! pfile->state.skipping) |
79bd622b | 1885 | { |
34c3de48 | 1886 | cpp_hashnode *node = lex_macro_node (pfile, false); |
f80e83a9 | 1887 | |
79bd622b | 1888 | if (node) |
71a7c282 | 1889 | { |
00e59df9 | 1890 | /* Do not treat conditional macros as being defined. This is due to |
1891 | the powerpc and spu ports using conditional macros for 'vector', | |
1892 | 'bool', and 'pixel' to act as conditional keywords. This messes | |
1893 | up tests like #ifndef bool. */ | |
1894 | skip = (node->type != NT_MACRO | |
1895 | || ((node->flags & NODE_CONDITIONAL) != 0)); | |
71a7c282 | 1896 | _cpp_mark_macro_used (node); |
34c3de48 | 1897 | if (!(node->flags & NODE_USED)) |
1898 | { | |
1899 | node->flags |= NODE_USED; | |
1900 | if (node->type == NT_MACRO) | |
1901 | { | |
df863d33 | 1902 | if ((node->flags & NODE_BUILTIN) |
1903 | && pfile->cb.user_builtin_macro) | |
1904 | pfile->cb.user_builtin_macro (pfile, node); | |
34c3de48 | 1905 | if (pfile->cb.used_define) |
1906 | pfile->cb.used_define (pfile, pfile->directive_line, node); | |
1907 | } | |
1908 | else | |
1909 | { | |
1910 | if (pfile->cb.used_undef) | |
1911 | pfile->cb.used_undef (pfile, pfile->directive_line, node); | |
1912 | } | |
1913 | } | |
116f0a5f | 1914 | if (pfile->cb.used) |
1915 | pfile->cb.used (pfile, pfile->directive_line, node); | |
6cda323a | 1916 | check_eol (pfile, false); |
71a7c282 | 1917 | } |
79bd622b | 1918 | } |
4bf559f2 | 1919 | |
79bd622b | 1920 | push_conditional (pfile, skip, T_IFDEF, 0); |
1921 | } | |
4bf559f2 | 1922 | |
e484a1cc | 1923 | /* Handle #ifndef. */ |
69461e0d | 1924 | static void |
f7fdd7a1 | 1925 | do_ifndef (cpp_reader *pfile) |
4bf559f2 | 1926 | { |
79bd622b | 1927 | int skip = 1; |
34c3de48 | 1928 | cpp_hashnode *node = 0; |
4bf559f2 | 1929 | |
5e878517 | 1930 | if (! pfile->state.skipping) |
b970ec42 | 1931 | { |
3e2a04b5 | 1932 | node = lex_macro_node (pfile, false); |
f99f369d | 1933 | |
1934 | if (node) | |
71a7c282 | 1935 | { |
00e59df9 | 1936 | /* Do not treat conditional macros as being defined. This is due to |
1937 | the powerpc and spu ports using conditional macros for 'vector', | |
1938 | 'bool', and 'pixel' to act as conditional keywords. This messes | |
1939 | up tests like #ifndef bool. */ | |
1940 | skip = (node->type == NT_MACRO | |
1941 | && ((node->flags & NODE_CONDITIONAL) == 0)); | |
71a7c282 | 1942 | _cpp_mark_macro_used (node); |
34c3de48 | 1943 | if (!(node->flags & NODE_USED)) |
1944 | { | |
1945 | node->flags |= NODE_USED; | |
1946 | if (node->type == NT_MACRO) | |
1947 | { | |
df863d33 | 1948 | if ((node->flags & NODE_BUILTIN) |
1949 | && pfile->cb.user_builtin_macro) | |
1950 | pfile->cb.user_builtin_macro (pfile, node); | |
34c3de48 | 1951 | if (pfile->cb.used_define) |
1952 | pfile->cb.used_define (pfile, pfile->directive_line, node); | |
1953 | } | |
1954 | else | |
1955 | { | |
1956 | if (pfile->cb.used_undef) | |
1957 | pfile->cb.used_undef (pfile, pfile->directive_line, node); | |
1958 | } | |
1959 | } | |
116f0a5f | 1960 | if (pfile->cb.used) |
1961 | pfile->cb.used (pfile, pfile->directive_line, node); | |
6cda323a | 1962 | check_eol (pfile, false); |
71a7c282 | 1963 | } |
b970ec42 | 1964 | } |
f80e83a9 | 1965 | |
79bd622b | 1966 | push_conditional (pfile, skip, T_IFNDEF, node); |
1d6fa33f | 1967 | } |
1968 | ||
fa233610 | 1969 | /* _cpp_parse_expr puts a macro in a "#if !defined ()" expression in |
1970 | pfile->mi_ind_cmacro so we can handle multiple-include | |
7ef5b942 | 1971 | optimizations. If macro expansion occurs in the expression, we |
fa233610 | 1972 | cannot treat it as a controlling conditional, since the expansion |
1973 | could change in the future. That is handled by cpp_get_token. */ | |
69461e0d | 1974 | static void |
f7fdd7a1 | 1975 | do_if (cpp_reader *pfile) |
1d6fa33f | 1976 | { |
79bd622b | 1977 | int skip = 1; |
1d6fa33f | 1978 | |
5e878517 | 1979 | if (! pfile->state.skipping) |
536a48ee | 1980 | skip = _cpp_parse_expr (pfile, true) == false; |
79bd622b | 1981 | |
fa233610 | 1982 | push_conditional (pfile, skip, T_IF, pfile->mi_ind_cmacro); |
1d6fa33f | 1983 | } |
1984 | ||
920b5d41 | 1985 | /* Flip skipping state if appropriate and continue without changing |
c4357c92 | 1986 | if_stack; this is so that the error message for missing #endif's |
1987 | etc. will point to the original #if. */ | |
69461e0d | 1988 | static void |
f7fdd7a1 | 1989 | do_else (cpp_reader *pfile) |
8e33b875 | 1990 | { |
920b5d41 | 1991 | cpp_buffer *buffer = pfile->buffer; |
1992 | struct if_stack *ifs = buffer->if_stack; | |
c030ed73 | 1993 | |
c4357c92 | 1994 | if (ifs == NULL) |
d80d2074 | 1995 | cpp_error (pfile, CPP_DL_ERROR, "#else without #if"); |
79bd622b | 1996 | else |
c030ed73 | 1997 | { |
79bd622b | 1998 | if (ifs->type == T_ELSE) |
1999 | { | |
d80d2074 | 2000 | cpp_error (pfile, CPP_DL_ERROR, "#else after #else"); |
2001 | cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
79bd622b | 2002 | "the conditional began here"); |
2003 | } | |
920b5d41 | 2004 | ifs->type = T_ELSE; |
2005 | ||
5e878517 | 2006 | /* Skip any future (erroneous) #elses or #elifs. */ |
2007 | pfile->state.skipping = ifs->skip_elses; | |
2008 | ifs->skip_elses = true; | |
1d6fa33f | 2009 | |
79bd622b | 2010 | /* Invalidate any controlling macro. */ |
2011 | ifs->mi_cmacro = 0; | |
79bd622b | 2012 | |
5e878517 | 2013 | /* Only check EOL if was not originally skipping. */ |
923acdd5 | 2014 | if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) |
f0fbe519 | 2015 | check_eol_endif_labels (pfile); |
5e878517 | 2016 | } |
1d6fa33f | 2017 | } |
2018 | ||
e484a1cc | 2019 | /* Handle a #elif directive by not changing if_stack either. See the |
79bd622b | 2020 | comment above do_else. */ |
69461e0d | 2021 | static void |
f7fdd7a1 | 2022 | do_elif (cpp_reader *pfile) |
1d6fa33f | 2023 | { |
920b5d41 | 2024 | cpp_buffer *buffer = pfile->buffer; |
2025 | struct if_stack *ifs = buffer->if_stack; | |
1d6fa33f | 2026 | |
c4357c92 | 2027 | if (ifs == NULL) |
d80d2074 | 2028 | cpp_error (pfile, CPP_DL_ERROR, "#elif without #if"); |
920b5d41 | 2029 | else |
0b60628c | 2030 | { |
920b5d41 | 2031 | if (ifs->type == T_ELSE) |
2032 | { | |
d80d2074 | 2033 | cpp_error (pfile, CPP_DL_ERROR, "#elif after #else"); |
2034 | cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
920b5d41 | 2035 | "the conditional began here"); |
2036 | } | |
2037 | ifs->type = T_ELIF; | |
79bd622b | 2038 | |
536a48ee | 2039 | if (! ifs->was_skipping) |
920b5d41 | 2040 | { |
536a48ee | 2041 | bool value; |
2042 | /* The standard mandates that the expression be parsed even | |
2043 | if we are skipping elses at this point -- the lexical | |
2044 | restrictions on #elif only apply to skipped groups, but | |
2045 | this group is not being skipped. Temporarily set | |
2046 | skipping to false to get lexer warnings. */ | |
5e878517 | 2047 | pfile->state.skipping = 0; |
536a48ee | 2048 | value = _cpp_parse_expr (pfile, false); |
2049 | if (ifs->skip_elses) | |
2050 | pfile->state.skipping = 1; | |
2051 | else | |
2052 | { | |
2053 | pfile->state.skipping = ! value; | |
2054 | ifs->skip_elses = value; | |
2055 | } | |
920b5d41 | 2056 | } |
5e878517 | 2057 | |
2058 | /* Invalidate any controlling macro. */ | |
2059 | ifs->mi_cmacro = 0; | |
0b60628c | 2060 | } |
1d6fa33f | 2061 | } |
2062 | ||
5e878517 | 2063 | /* #endif pops the if stack and resets pfile->state.skipping. */ |
69461e0d | 2064 | static void |
f7fdd7a1 | 2065 | do_endif (cpp_reader *pfile) |
1d6fa33f | 2066 | { |
920b5d41 | 2067 | cpp_buffer *buffer = pfile->buffer; |
2068 | struct if_stack *ifs = buffer->if_stack; | |
c4357c92 | 2069 | |
c4357c92 | 2070 | if (ifs == NULL) |
d80d2074 | 2071 | cpp_error (pfile, CPP_DL_ERROR, "#endif without #if"); |
1d6fa33f | 2072 | else |
2073 | { | |
5e878517 | 2074 | /* Only check EOL if was not originally skipping. */ |
923acdd5 | 2075 | if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) |
f0fbe519 | 2076 | check_eol_endif_labels (pfile); |
5e878517 | 2077 | |
79bd622b | 2078 | /* If potential control macro, we go back outside again. */ |
2079 | if (ifs->next == 0 && ifs->mi_cmacro) | |
2080 | { | |
fa233610 | 2081 | pfile->mi_valid = true; |
79bd622b | 2082 | pfile->mi_cmacro = ifs->mi_cmacro; |
2083 | } | |
2084 | ||
920b5d41 | 2085 | buffer->if_stack = ifs->next; |
5e878517 | 2086 | pfile->state.skipping = ifs->was_skipping; |
0d086e18 | 2087 | obstack_free (&pfile->buffer_ob, ifs); |
1d6fa33f | 2088 | } |
79bd622b | 2089 | } |
f80e83a9 | 2090 | |
e484a1cc | 2091 | /* Push an if_stack entry for a preprocessor conditional, and set |
2092 | pfile->state.skipping to SKIP. If TYPE indicates the conditional | |
2093 | is #if or #ifndef, CMACRO is a potentially controlling macro, and | |
2094 | we need to check here that we are at the top of the file. */ | |
c4357c92 | 2095 | static void |
f7fdd7a1 | 2096 | push_conditional (cpp_reader *pfile, int skip, int type, |
2097 | const cpp_hashnode *cmacro) | |
c4357c92 | 2098 | { |
2099 | struct if_stack *ifs; | |
920b5d41 | 2100 | cpp_buffer *buffer = pfile->buffer; |
c4357c92 | 2101 | |
3b298764 | 2102 | ifs = XOBNEW (&pfile->buffer_ob, struct if_stack); |
729d2022 | 2103 | ifs->line = pfile->directive_line; |
920b5d41 | 2104 | ifs->next = buffer->if_stack; |
5e878517 | 2105 | ifs->skip_elses = pfile->state.skipping || !skip; |
2106 | ifs->was_skipping = pfile->state.skipping; | |
c4357c92 | 2107 | ifs->type = type; |
fa233610 | 2108 | /* This condition is effectively a test for top-of-file. */ |
2109 | if (pfile->mi_valid && pfile->mi_cmacro == 0) | |
79bd622b | 2110 | ifs->mi_cmacro = cmacro; |
2111 | else | |
2112 | ifs->mi_cmacro = 0; | |
c4357c92 | 2113 | |
5e878517 | 2114 | pfile->state.skipping = skip; |
920b5d41 | 2115 | buffer->if_stack = ifs; |
4896abfd | 2116 | } |
69bcbfc6 | 2117 | |
e484a1cc | 2118 | /* Read the tokens of the answer into the macro pool, in a directive |
2119 | of type TYPE. Only commit the memory if we intend it as permanent | |
2120 | storage, i.e. the #assert case. Returns 0 on success, and sets | |
78ed8e3d | 2121 | ANSWERP to point to the answer. PRED_LOC is the location of the |
2122 | predicate. */ | |
79bd622b | 2123 | static int |
78ed8e3d | 2124 | parse_answer (cpp_reader *pfile, struct answer **answerp, int type, |
2125 | source_location pred_loc) | |
1d6fa33f | 2126 | { |
f9b5f742 | 2127 | const cpp_token *paren; |
79bd622b | 2128 | struct answer *answer; |
e6a5f963 | 2129 | unsigned int acount; |
79bd622b | 2130 | |
2131 | /* In a conditional, it is legal to not have an open paren. We | |
2132 | should save the following token in this case. */ | |
f9b5f742 | 2133 | paren = cpp_get_token (pfile); |
79bd622b | 2134 | |
2135 | /* If not a paren, see if we're OK. */ | |
f9b5f742 | 2136 | if (paren->type != CPP_OPEN_PAREN) |
f80e83a9 | 2137 | { |
79bd622b | 2138 | /* In a conditional no answer is a test for any answer. It |
2139 | could be followed by any token. */ | |
2140 | if (type == T_IF) | |
fb5ab82c | 2141 | { |
2142 | _cpp_backup_tokens (pfile, 1); | |
2143 | return 0; | |
2144 | } | |
79bd622b | 2145 | |
2146 | /* #unassert with no answer is valid - it removes all answers. */ | |
f9b5f742 | 2147 | if (type == T_UNASSERT && paren->type == CPP_EOF) |
79bd622b | 2148 | return 0; |
bce8e0c0 | 2149 | |
78ed8e3d | 2150 | cpp_error_with_line (pfile, CPP_DL_ERROR, pred_loc, 0, |
2151 | "missing '(' after predicate"); | |
79bd622b | 2152 | return 1; |
f80e83a9 | 2153 | } |
69bcbfc6 | 2154 | |
e6a5f963 | 2155 | for (acount = 0;; acount++) |
f80e83a9 | 2156 | { |
e6a5f963 | 2157 | size_t room_needed; |
2158 | const cpp_token *token = cpp_get_token (pfile); | |
2159 | cpp_token *dest; | |
79bd622b | 2160 | |
f80e83a9 | 2161 | if (token->type == CPP_CLOSE_PAREN) |
2162 | break; | |
3ba8b497 | 2163 | |
79bd622b | 2164 | if (token->type == CPP_EOF) |
f80e83a9 | 2165 | { |
d80d2074 | 2166 | cpp_error (pfile, CPP_DL_ERROR, "missing ')' to complete answer"); |
79bd622b | 2167 | return 1; |
f80e83a9 | 2168 | } |
e6a5f963 | 2169 | |
2170 | /* struct answer includes the space for one token. */ | |
2171 | room_needed = (sizeof (struct answer) + acount * sizeof (cpp_token)); | |
2172 | ||
2173 | if (BUFF_ROOM (pfile->a_buff) < room_needed) | |
2174 | _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (struct answer)); | |
2175 | ||
2176 | dest = &((struct answer *) BUFF_FRONT (pfile->a_buff))->first[acount]; | |
2177 | *dest = *token; | |
2178 | ||
2179 | /* Drop whitespace at start, for answer equivalence purposes. */ | |
2180 | if (acount == 0) | |
2181 | dest->flags &= ~PREV_WHITE; | |
f80e83a9 | 2182 | } |
bce8e0c0 | 2183 | |
e6a5f963 | 2184 | if (acount == 0) |
69bcbfc6 | 2185 | { |
d80d2074 | 2186 | cpp_error (pfile, CPP_DL_ERROR, "predicate's answer is empty"); |
79bd622b | 2187 | return 1; |
1d6fa33f | 2188 | } |
f80e83a9 | 2189 | |
e6a5f963 | 2190 | answer = (struct answer *) BUFF_FRONT (pfile->a_buff); |
2191 | answer->count = acount; | |
2192 | answer->next = NULL; | |
79bd622b | 2193 | *answerp = answer; |
f80e83a9 | 2194 | |
79bd622b | 2195 | return 0; |
2196 | } | |
f80e83a9 | 2197 | |
e484a1cc | 2198 | /* Parses an assertion directive of type TYPE, returning a pointer to |
2199 | the hash node of the predicate, or 0 on error. If an answer was | |
2200 | supplied, it is placed in ANSWERP, otherwise it is set to 0. */ | |
79bd622b | 2201 | static cpp_hashnode * |
f7fdd7a1 | 2202 | parse_assertion (cpp_reader *pfile, struct answer **answerp, int type) |
79bd622b | 2203 | { |
2204 | cpp_hashnode *result = 0; | |
f9b5f742 | 2205 | const cpp_token *predicate; |
79bd622b | 2206 | |
2207 | /* We don't expand predicates or answers. */ | |
2208 | pfile->state.prevent_expansion++; | |
2209 | ||
79bd622b | 2210 | *answerp = 0; |
f9b5f742 | 2211 | predicate = cpp_get_token (pfile); |
2212 | if (predicate->type == CPP_EOF) | |
d80d2074 | 2213 | cpp_error (pfile, CPP_DL_ERROR, "assertion without predicate"); |
f9b5f742 | 2214 | else if (predicate->type != CPP_NAME) |
78ed8e3d | 2215 | cpp_error_with_line (pfile, CPP_DL_ERROR, predicate->src_loc, 0, |
2216 | "predicate must be an identifier"); | |
2217 | else if (parse_answer (pfile, answerp, type, predicate->src_loc) == 0) | |
79bd622b | 2218 | { |
2ee04baa | 2219 | unsigned int len = NODE_LEN (predicate->val.node.node); |
720aca92 | 2220 | unsigned char *sym = (unsigned char *) alloca (len + 1); |
f80e83a9 | 2221 | |
79bd622b | 2222 | /* Prefix '#' to get it out of macro namespace. */ |
2223 | sym[0] = '#'; | |
2ee04baa | 2224 | memcpy (sym + 1, NODE_NAME (predicate->val.node.node), len); |
79bd622b | 2225 | result = cpp_lookup (pfile, sym, len + 1); |
2226 | } | |
69bcbfc6 | 2227 | |
79bd622b | 2228 | pfile->state.prevent_expansion--; |
2229 | return result; | |
1d6fa33f | 2230 | } |
69bcbfc6 | 2231 | |
e484a1cc | 2232 | /* Returns a pointer to the pointer to CANDIDATE in the answer chain, |
f80e83a9 | 2233 | or a pointer to NULL if the answer is not in the chain. */ |
79bd622b | 2234 | static struct answer ** |
f7fdd7a1 | 2235 | find_answer (cpp_hashnode *node, const struct answer *candidate) |
1d6fa33f | 2236 | { |
79bd622b | 2237 | unsigned int i; |
f80e83a9 | 2238 | struct answer **result; |
1d6fa33f | 2239 | |
f80e83a9 | 2240 | for (result = &node->value.answers; *result; result = &(*result)->next) |
79bd622b | 2241 | { |
2242 | struct answer *answer = *result; | |
2243 | ||
2244 | if (answer->count == candidate->count) | |
2245 | { | |
2246 | for (i = 0; i < answer->count; i++) | |
2247 | if (! _cpp_equiv_tokens (&answer->first[i], &candidate->first[i])) | |
2248 | break; | |
2249 | ||
2250 | if (i == answer->count) | |
2251 | break; | |
2252 | } | |
2253 | } | |
c030ed73 | 2254 | |
f80e83a9 | 2255 | return result; |
2256 | } | |
bce8e0c0 | 2257 | |
79bd622b | 2258 | /* Test an assertion within a preprocessor conditional. Returns |
d10cfa8d | 2259 | nonzero on failure, zero on success. On success, the result of |
9fd28e01 | 2260 | the test is written into VALUE, otherwise the value 0. */ |
79bd622b | 2261 | int |
f7fdd7a1 | 2262 | _cpp_test_assertion (cpp_reader *pfile, unsigned int *value) |
79bd622b | 2263 | { |
2264 | struct answer *answer; | |
2265 | cpp_hashnode *node; | |
2266 | ||
2267 | node = parse_assertion (pfile, &answer, T_IF); | |
9fd28e01 | 2268 | |
2269 | /* For recovery, an erroneous assertion expression is handled as a | |
2270 | failing assertion. */ | |
2271 | *value = 0; | |
2272 | ||
79bd622b | 2273 | if (node) |
2274 | *value = (node->type == NT_ASSERTION && | |
2275 | (answer == 0 || *find_answer (node, answer) != 0)); | |
b444d47a | 2276 | else if (pfile->cur_token[-1].type == CPP_EOF) |
2277 | _cpp_backup_tokens (pfile, 1); | |
79bd622b | 2278 | |
2279 | /* We don't commit the memory for the answer - it's temporary only. */ | |
2280 | return node == 0; | |
2281 | } | |
2282 | ||
e484a1cc | 2283 | /* Handle #assert. */ |
69461e0d | 2284 | static void |
f7fdd7a1 | 2285 | do_assert (cpp_reader *pfile) |
f80e83a9 | 2286 | { |
2287 | struct answer *new_answer; | |
2288 | cpp_hashnode *node; | |
b1a9ff83 | 2289 | |
79bd622b | 2290 | node = parse_assertion (pfile, &new_answer, T_ASSERT); |
f80e83a9 | 2291 | if (node) |
c030ed73 | 2292 | { |
c39ed964 | 2293 | size_t answer_size; |
2294 | ||
79bd622b | 2295 | /* Place the new answer in the answer list. First check there |
2296 | is not a duplicate. */ | |
f80e83a9 | 2297 | new_answer->next = 0; |
79bd622b | 2298 | if (node->type == NT_ASSERTION) |
f80e83a9 | 2299 | { |
79bd622b | 2300 | if (*find_answer (node, new_answer)) |
2301 | { | |
d80d2074 | 2302 | cpp_error (pfile, CPP_DL_WARNING, "\"%s\" re-asserted", |
73328dce | 2303 | NODE_NAME (node) + 1); |
79bd622b | 2304 | return; |
2305 | } | |
f80e83a9 | 2306 | new_answer->next = node->value.answers; |
2307 | } | |
e6a5f963 | 2308 | |
c39ed964 | 2309 | answer_size = sizeof (struct answer) + ((new_answer->count - 1) |
2310 | * sizeof (cpp_token)); | |
2311 | /* Commit or allocate storage for the object. */ | |
2312 | if (pfile->hash_table->alloc_subobject) | |
2313 | { | |
2314 | struct answer *temp_answer = new_answer; | |
720aca92 | 2315 | new_answer = (struct answer *) pfile->hash_table->alloc_subobject |
2316 | (answer_size); | |
c39ed964 | 2317 | memcpy (new_answer, temp_answer, answer_size); |
2318 | } | |
2319 | else | |
2320 | BUFF_FRONT (pfile->a_buff) += answer_size; | |
2321 | ||
79bd622b | 2322 | node->type = NT_ASSERTION; |
f80e83a9 | 2323 | node->value.answers = new_answer; |
6cda323a | 2324 | check_eol (pfile, false); |
c030ed73 | 2325 | } |
f80e83a9 | 2326 | } |
bce8e0c0 | 2327 | |
e484a1cc | 2328 | /* Handle #unassert. */ |
69461e0d | 2329 | static void |
f7fdd7a1 | 2330 | do_unassert (cpp_reader *pfile) |
f80e83a9 | 2331 | { |
2332 | cpp_hashnode *node; | |
79bd622b | 2333 | struct answer *answer; |
b1a9ff83 | 2334 | |
79bd622b | 2335 | node = parse_assertion (pfile, &answer, T_UNASSERT); |
2336 | /* It isn't an error to #unassert something that isn't asserted. */ | |
2337 | if (node && node->type == NT_ASSERTION) | |
69bcbfc6 | 2338 | { |
79bd622b | 2339 | if (answer) |
bce8e0c0 | 2340 | { |
79bd622b | 2341 | struct answer **p = find_answer (node, answer), *temp; |
f80e83a9 | 2342 | |
79bd622b | 2343 | /* Remove the answer from the list. */ |
2344 | temp = *p; | |
2345 | if (temp) | |
2346 | *p = temp->next; | |
3ba8b497 | 2347 | |
79bd622b | 2348 | /* Did we free the last answer? */ |
2349 | if (node->value.answers == 0) | |
2350 | node->type = NT_VOID; | |
e6a5f963 | 2351 | |
6cda323a | 2352 | check_eol (pfile, false); |
79bd622b | 2353 | } |
2354 | else | |
2355 | _cpp_free_definition (node); | |
f80e83a9 | 2356 | } |
79bd622b | 2357 | |
2358 | /* We don't commit the memory for the answer - it's temporary only. */ | |
1d6fa33f | 2359 | } |
1d6fa33f | 2360 | |
0578f103 | 2361 | /* These are for -D, -U, -A. */ |
2362 | ||
2363 | /* Process the string STR as if it appeared as the body of a #define. | |
2364 | If STR is just an identifier, define it with value 1. | |
2365 | If STR has anything after the identifier, then it should | |
2c0e001b | 2366 | be identifier=definition. */ |
9fa36617 | 2367 | void |
f7fdd7a1 | 2368 | cpp_define (cpp_reader *pfile, const char *str) |
9fa36617 | 2369 | { |
3f24af9b | 2370 | char *buf; |
2371 | const char *p; | |
0578f103 | 2372 | size_t count; |
2373 | ||
b1a9ff83 | 2374 | /* Copy the entire option so we can modify it. |
0578f103 | 2375 | Change the first "=" in the string to a space. If there is none, |
90dc47e0 | 2376 | tack " 1" on the end. */ |
2377 | ||
90dc47e0 | 2378 | count = strlen (str); |
720aca92 | 2379 | buf = (char *) alloca (count + 3); |
90dc47e0 | 2380 | memcpy (buf, str, count); |
2381 | ||
2382 | p = strchr (str, '='); | |
0578f103 | 2383 | if (p) |
90dc47e0 | 2384 | buf[p - str] = ' '; |
0578f103 | 2385 | else |
2386 | { | |
90dc47e0 | 2387 | buf[count++] = ' '; |
2388 | buf[count++] = '1'; | |
9fa36617 | 2389 | } |
a54e0bf8 | 2390 | buf[count] = '\n'; |
eb3948d1 | 2391 | |
c808d026 | 2392 | run_directive (pfile, T_DEFINE, buf, count); |
a336277c | 2393 | } |
2394 | ||
85e51d59 | 2395 | |
2396 | /* Use to build macros to be run through cpp_define() as | |
2397 | described above. | |
2398 | Example: cpp_define_formatted (pfile, "MACRO=%d", value); */ | |
2399 | ||
2400 | void | |
2401 | cpp_define_formatted (cpp_reader *pfile, const char *fmt, ...) | |
2402 | { | |
5d95297a | 2403 | char *ptr; |
85e51d59 | 2404 | |
2405 | va_list ap; | |
2406 | va_start (ap, fmt); | |
5d95297a | 2407 | ptr = xvasprintf (fmt, ap); |
85e51d59 | 2408 | va_end (ap); |
2409 | ||
2410 | cpp_define (pfile, ptr); | |
2411 | free (ptr); | |
2412 | } | |
2413 | ||
2414 | ||
f0c20935 | 2415 | /* Slight variant of the above for use by initialize_builtins. */ |
a336277c | 2416 | void |
f7fdd7a1 | 2417 | _cpp_define_builtin (cpp_reader *pfile, const char *str) |
a336277c | 2418 | { |
a54e0bf8 | 2419 | size_t len = strlen (str); |
720aca92 | 2420 | char *buf = (char *) alloca (len + 1); |
a54e0bf8 | 2421 | memcpy (buf, str, len); |
2422 | buf[len] = '\n'; | |
2423 | run_directive (pfile, T_DEFINE, buf, len); | |
0578f103 | 2424 | } |
a92771b8 | 2425 | |
0578f103 | 2426 | /* Process MACRO as if it appeared as the body of an #undef. */ |
2427 | void | |
f7fdd7a1 | 2428 | cpp_undef (cpp_reader *pfile, const char *macro) |
1d6fa33f | 2429 | { |
a54e0bf8 | 2430 | size_t len = strlen (macro); |
720aca92 | 2431 | char *buf = (char *) alloca (len + 1); |
a54e0bf8 | 2432 | memcpy (buf, macro, len); |
2433 | buf[len] = '\n'; | |
2434 | run_directive (pfile, T_UNDEF, buf, len); | |
1d6fa33f | 2435 | } |
2436 | ||
0d601ff4 | 2437 | /* Replace a previous definition DEF of the macro STR. If DEF is NULL, |
2438 | or first element is zero, then the macro should be undefined. */ | |
2439 | static void | |
2440 | cpp_pop_definition (cpp_reader *pfile, struct def_pragma_macro *c) | |
3fa3949d | 2441 | { |
0d601ff4 | 2442 | cpp_hashnode *node = _cpp_lex_identifier (pfile, c->name); |
3fa3949d | 2443 | if (node == NULL) |
2444 | return; | |
2445 | ||
34c3de48 | 2446 | if (pfile->cb.before_define) |
2447 | pfile->cb.before_define (pfile); | |
2448 | ||
3fa3949d | 2449 | if (node->type == NT_MACRO) |
2450 | { | |
2451 | if (pfile->cb.undef) | |
2452 | pfile->cb.undef (pfile, pfile->directive_line, node); | |
2453 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
2454 | _cpp_warn_if_unused_macro (pfile, node, NULL); | |
2455 | } | |
2456 | if (node->type != NT_VOID) | |
2457 | _cpp_free_definition (node); | |
2458 | ||
0d601ff4 | 2459 | if (c->is_undef) |
2460 | return; | |
2461 | { | |
2462 | size_t namelen; | |
2463 | const uchar *dn; | |
2464 | cpp_hashnode *h = NULL; | |
2465 | cpp_buffer *nbuf; | |
2466 | ||
2467 | namelen = ustrcspn (c->definition, "( \n"); | |
2468 | h = cpp_lookup (pfile, c->definition, namelen); | |
2469 | dn = c->definition + namelen; | |
2470 | ||
2471 | h->type = NT_VOID; | |
2472 | h->flags &= ~(NODE_POISONED|NODE_BUILTIN|NODE_DISABLED|NODE_USED); | |
2473 | nbuf = cpp_push_buffer (pfile, dn, ustrchr (dn, '\n') - dn, true); | |
2474 | if (nbuf != NULL) | |
2475 | { | |
2476 | _cpp_clean_line (pfile); | |
2477 | nbuf->sysp = 1; | |
2478 | if (!_cpp_create_definition (pfile, h)) | |
2479 | abort (); | |
2480 | _cpp_pop_buffer (pfile); | |
2481 | } | |
2482 | else | |
2483 | abort (); | |
2484 | h->value.macro->line = c->line; | |
2485 | h->value.macro->syshdr = c->syshdr; | |
2486 | h->value.macro->used = c->used; | |
2487 | } | |
3fa3949d | 2488 | } |
2489 | ||
2c0e001b | 2490 | /* Process the string STR as if it appeared as the body of a #assert. */ |
0578f103 | 2491 | void |
f7fdd7a1 | 2492 | cpp_assert (cpp_reader *pfile, const char *str) |
0578f103 | 2493 | { |
90dc47e0 | 2494 | handle_assertion (pfile, str, T_ASSERT); |
0578f103 | 2495 | } |
1d6fa33f | 2496 | |
2c0e001b | 2497 | /* Process STR as if it appeared as the body of an #unassert. */ |
0578f103 | 2498 | void |
f7fdd7a1 | 2499 | cpp_unassert (cpp_reader *pfile, const char *str) |
1d6fa33f | 2500 | { |
90dc47e0 | 2501 | handle_assertion (pfile, str, T_UNASSERT); |
b1a9ff83 | 2502 | } |
e3630c4b | 2503 | |
90dc47e0 | 2504 | /* Common code for cpp_assert (-A) and cpp_unassert (-A-). */ |
2505 | static void | |
f7fdd7a1 | 2506 | handle_assertion (cpp_reader *pfile, const char *str, int type) |
90dc47e0 | 2507 | { |
2508 | size_t count = strlen (str); | |
2509 | const char *p = strchr (str, '='); | |
2510 | ||
a54e0bf8 | 2511 | /* Copy the entire option so we can modify it. Change the first |
2512 | "=" in the string to a '(', and tack a ')' on the end. */ | |
720aca92 | 2513 | char *buf = (char *) alloca (count + 2); |
a54e0bf8 | 2514 | |
2515 | memcpy (buf, str, count); | |
90dc47e0 | 2516 | if (p) |
2517 | { | |
90dc47e0 | 2518 | buf[p - str] = '('; |
2519 | buf[count++] = ')'; | |
90dc47e0 | 2520 | } |
a54e0bf8 | 2521 | buf[count] = '\n'; |
2522 | str = buf; | |
90dc47e0 | 2523 | |
c808d026 | 2524 | run_directive (pfile, type, str, count); |
90dc47e0 | 2525 | } |
2526 | ||
72b04ca4 | 2527 | /* The options structure. */ |
2528 | cpp_options * | |
f7fdd7a1 | 2529 | cpp_get_options (cpp_reader *pfile) |
72b04ca4 | 2530 | { |
2531 | return &pfile->opts; | |
2532 | } | |
2533 | ||
2534 | /* The callbacks structure. */ | |
2535 | cpp_callbacks * | |
f7fdd7a1 | 2536 | cpp_get_callbacks (cpp_reader *pfile) |
72b04ca4 | 2537 | { |
2538 | return &pfile->cb; | |
2539 | } | |
2540 | ||
2541 | /* Copy the given callbacks structure to our own. */ | |
2542 | void | |
f7fdd7a1 | 2543 | cpp_set_callbacks (cpp_reader *pfile, cpp_callbacks *cb) |
72b04ca4 | 2544 | { |
2545 | pfile->cb = *cb; | |
2546 | } | |
2547 | ||
3eb3f293 | 2548 | /* The dependencies structure. (Creates one if it hasn't already been.) */ |
2549 | struct deps * | |
2550 | cpp_get_deps (cpp_reader *pfile) | |
2551 | { | |
2552 | if (!pfile->deps) | |
2553 | pfile->deps = deps_init (); | |
2554 | return pfile->deps; | |
2555 | } | |
2556 | ||
4087613d | 2557 | /* Push a new buffer on the buffer stack. Returns the new buffer; it |
2558 | doesn't fail. It does not generate a file change call back; that | |
2559 | is the responsibility of the caller. */ | |
f51c2148 | 2560 | cpp_buffer * |
f7fdd7a1 | 2561 | cpp_push_buffer (cpp_reader *pfile, const uchar *buffer, size_t len, |
9eb74666 | 2562 | int from_stage3) |
f51c2148 | 2563 | { |
720aca92 | 2564 | cpp_buffer *new_buffer = XOBNEW (&pfile->buffer_ob, cpp_buffer); |
79bd622b | 2565 | |
bd507c05 | 2566 | /* Clears, amongst other things, if_stack and mi_cmacro. */ |
720aca92 | 2567 | memset (new_buffer, 0, sizeof (cpp_buffer)); |
bd507c05 | 2568 | |
720aca92 | 2569 | new_buffer->next_line = new_buffer->buf = buffer; |
2570 | new_buffer->rlimit = buffer + len; | |
2571 | new_buffer->from_stage3 = from_stage3; | |
2572 | new_buffer->prev = pfile->buffer; | |
2573 | new_buffer->need_line = true; | |
6cee4464 | 2574 | |
720aca92 | 2575 | pfile->buffer = new_buffer; |
787c3d1a | 2576 | |
720aca92 | 2577 | return new_buffer; |
f51c2148 | 2578 | } |
2579 | ||
02516fb9 | 2580 | /* Pops a single buffer, with a file change call-back if appropriate. |
2581 | Then pushes the next -include file, if any remain. */ | |
4dfe8b74 | 2582 | void |
f7fdd7a1 | 2583 | _cpp_pop_buffer (cpp_reader *pfile) |
f51c2148 | 2584 | { |
bd507c05 | 2585 | cpp_buffer *buffer = pfile->buffer; |
1824e2bd | 2586 | struct _cpp_file *inc = buffer->file; |
f0c20935 | 2587 | struct if_stack *ifs; |
914db4b7 | 2588 | const unsigned char *to_free; |
f51c2148 | 2589 | |
bd507c05 | 2590 | /* Walk back up the conditional stack till we reach its level at |
2591 | entry to this file, issuing error messages. */ | |
2592 | for (ifs = buffer->if_stack; ifs; ifs = ifs->next) | |
d80d2074 | 2593 | cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, |
bd507c05 | 2594 | "unterminated #%s", dtable[ifs->type].name); |
4087613d | 2595 | |
5621a364 | 2596 | /* In case of a missing #endif. */ |
1ea7ed21 | 2597 | pfile->state.skipping = 0; |
c808d026 | 2598 | |
02516fb9 | 2599 | /* _cpp_do_file_change expects pfile->buffer to be the new one. */ |
c808d026 | 2600 | pfile->buffer = buffer->prev; |
2601 | ||
914db4b7 | 2602 | to_free = buffer->to_free; |
a54e0bf8 | 2603 | free (buffer->notes); |
2604 | ||
02516fb9 | 2605 | /* Free the buffer object now; we may want to push a new buffer |
2606 | in _cpp_push_next_include_file. */ | |
2607 | obstack_free (&pfile->buffer_ob, buffer); | |
c808d026 | 2608 | |
02516fb9 | 2609 | if (inc) |
2610 | { | |
914db4b7 | 2611 | _cpp_pop_file_buffer (pfile, inc, to_free); |
02516fb9 | 2612 | |
9eb74666 | 2613 | _cpp_do_file_change (pfile, LC_LEAVE, 0, 0, 0); |
02516fb9 | 2614 | } |
f51c2148 | 2615 | } |
2616 | ||
a2f10574 | 2617 | /* Enter all recognized directives in the hash table. */ |
f51c2148 | 2618 | void |
f7fdd7a1 | 2619 | _cpp_init_directives (cpp_reader *pfile) |
f51c2148 | 2620 | { |
87f5a8f0 | 2621 | unsigned int i; |
79bd622b | 2622 | cpp_hashnode *node; |
76faa4c0 | 2623 | |
ee6c4e4b | 2624 | for (i = 0; i < (unsigned int) N_DIRECTIVES; i++) |
79bd622b | 2625 | { |
87f5a8f0 | 2626 | node = cpp_lookup (pfile, dtable[i].name, dtable[i].length); |
805e22b2 | 2627 | node->is_directive = 1; |
2628 | node->directive_index = i; | |
79bd622b | 2629 | } |
f51c2148 | 2630 | } |
f6751ff2 | 2631 | |
2632 | /* Extract header file from a bracket include. Parsing starts after '<'. | |
2633 | The string is malloced and must be freed by the caller. */ | |
2634 | char * | |
2635 | _cpp_bracket_include(cpp_reader *pfile) | |
2636 | { | |
2637 | return glue_header_name (pfile); | |
2638 | } | |
2639 |