]>
Commit | Line | Data |
---|---|---|
a949941c | 1 | /* CPP Library. (Directive handling.) |
5e7b4e25 | 2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
705e2d28 | 3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
33ae4837 | 4 | 2007, 2008 Free Software Foundation, Inc. |
4c8cc616 | 5 | Contributed by Per Bothner, 1994-95. |
d8bfa78c | 6 | Based on CCCP program by Paul Rubin, June 1986 |
7f2935c7 PB |
7 | Adapted to ANSI C, Richard Stallman, Jan 1987 |
8 | ||
9 | This program is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU General Public License as published by the | |
11 | Free Software Foundation; either version 2, or (at your option) any | |
12 | later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
200031d1 | 21 | Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
7f2935c7 | 22 | |
956d6950 | 23 | #include "config.h" |
b04cd507 | 24 | #include "system.h" |
956d6950 | 25 | #include "cpplib.h" |
4f4e53dd | 26 | #include "internal.h" |
c6e83800 | 27 | #include "mkdeps.h" |
c71f835b | 28 | #include "obstack.h" |
7f2935c7 | 29 | |
88ae23e7 ZW |
30 | /* Stack of conditionals currently in progress |
31 | (including both successful and failing conditionals). */ | |
88ae23e7 ZW |
32 | struct if_stack |
33 | { | |
34 | struct if_stack *next; | |
50410426 | 35 | unsigned int line; /* Line where condition started. */ |
93c80368 | 36 | const cpp_hashnode *mi_cmacro;/* macro name for #ifndef around entire file */ |
cef0d199 NB |
37 | bool skip_elses; /* Can future #else / #elif be skipped? */ |
38 | bool was_skipping; /* If were skipping on entry. */ | |
6cf87ca4 | 39 | int type; /* Most recent conditional for diagnostics. */ |
88ae23e7 | 40 | }; |
88ae23e7 | 41 | |
a5da89c6 | 42 | /* Contains a registered pragma or pragma namespace. */ |
6cf87ca4 | 43 | typedef void (*pragma_cb) (cpp_reader *); |
a5da89c6 NB |
44 | struct pragma_entry |
45 | { | |
46 | struct pragma_entry *next; | |
4b115ff0 | 47 | const cpp_hashnode *pragma; /* Name and length. */ |
21b11495 ZW |
48 | bool is_nspace; |
49 | bool is_internal; | |
bc4071dd RH |
50 | bool is_deferred; |
51 | bool allow_expansion; | |
a5da89c6 NB |
52 | union { |
53 | pragma_cb handler; | |
54 | struct pragma_entry *space; | |
bc4071dd | 55 | unsigned int ident; |
a5da89c6 NB |
56 | } u; |
57 | }; | |
58 | ||
93c80368 NB |
59 | /* Values for the origin field of struct directive. KANDR directives |
60 | come from traditional (K&R) C. STDC89 directives come from the | |
61 | 1989 C standard. EXTENSION directives are extensions. */ | |
62 | #define KANDR 0 | |
63 | #define STDC89 1 | |
64 | #define EXTENSION 2 | |
65 | ||
66 | /* Values for the flags field of struct directive. COND indicates a | |
67 | conditional; IF_COND an opening conditional. INCL means to treat | |
68 | "..." and <...> as q-char and h-char sequences respectively. IN_I | |
69 | means this directive should be handled even if -fpreprocessed is in | |
1a76916c NB |
70 | effect (these are the directives with callback hooks). |
71 | ||
d97371e0 | 72 | EXPAND is set on directives that are always macro-expanded. */ |
93c80368 NB |
73 | #define COND (1 << 0) |
74 | #define IF_COND (1 << 1) | |
75 | #define INCL (1 << 2) | |
76 | #define IN_I (1 << 3) | |
1a76916c | 77 | #define EXPAND (1 << 4) |
899015a0 | 78 | #define DEPRECATED (1 << 5) |
93c80368 NB |
79 | |
80 | /* Defines one #-directive, including how to handle it. */ | |
6cf87ca4 | 81 | typedef void (*directive_handler) (cpp_reader *); |
93c80368 NB |
82 | typedef struct directive directive; |
83 | struct directive | |
84 | { | |
85 | directive_handler handler; /* Function to handle directive. */ | |
562a5c27 | 86 | const uchar *name; /* Name of directive. */ |
93c80368 NB |
87 | unsigned short length; /* Length of name. */ |
88 | unsigned char origin; /* Origin of directive. */ | |
89 | unsigned char flags; /* Flags describing this directive. */ | |
90 | }; | |
91 | ||
1316f1f7 ZW |
92 | /* Forward declarations. */ |
93 | ||
6cf87ca4 ZW |
94 | static void skip_rest_of_line (cpp_reader *); |
95 | static void check_eol (cpp_reader *); | |
96 | static void start_directive (cpp_reader *); | |
97 | static void prepare_directive_trad (cpp_reader *); | |
98 | static void end_directive (cpp_reader *, int); | |
99 | static void directive_diagnostics (cpp_reader *, const directive *, int); | |
100 | static void run_directive (cpp_reader *, int, const char *, size_t); | |
101 | static char *glue_header_name (cpp_reader *); | |
cbc43ae0 | 102 | static const char *parse_include (cpp_reader *, int *, const cpp_token ***); |
6cf87ca4 ZW |
103 | static void push_conditional (cpp_reader *, int, int, const cpp_hashnode *); |
104 | static unsigned int read_flag (cpp_reader *, unsigned int); | |
6cf87ca4 ZW |
105 | static int strtoul_for_line (const uchar *, unsigned int, unsigned long *); |
106 | static void do_diagnostic (cpp_reader *, int, int); | |
ee1c2a10 | 107 | static cpp_hashnode *lex_macro_node (cpp_reader *, bool); |
d1bd0ded | 108 | static int undefine_macros (cpp_reader *, cpp_hashnode *, void *); |
6cf87ca4 ZW |
109 | static void do_include_common (cpp_reader *, enum include_type); |
110 | static struct pragma_entry *lookup_pragma_entry (struct pragma_entry *, | |
111 | const cpp_hashnode *); | |
6cf87ca4 ZW |
112 | static int count_registered_pragmas (struct pragma_entry *); |
113 | static char ** save_registered_pragmas (struct pragma_entry *, char **); | |
114 | static char ** restore_registered_pragmas (cpp_reader *, struct pragma_entry *, | |
115 | char **); | |
116 | static void do_pragma_once (cpp_reader *); | |
117 | static void do_pragma_poison (cpp_reader *); | |
118 | static void do_pragma_system_header (cpp_reader *); | |
119 | static void do_pragma_dependency (cpp_reader *); | |
120 | static void do_linemarker (cpp_reader *); | |
121 | static const cpp_token *get_token_no_padding (cpp_reader *); | |
122 | static const cpp_token *get__Pragma_string (cpp_reader *); | |
123 | static void destringize_and_run (cpp_reader *, const cpp_string *); | |
124 | static int parse_answer (cpp_reader *, struct answer **, int); | |
125 | static cpp_hashnode *parse_assertion (cpp_reader *, struct answer **, int); | |
126 | static struct answer ** find_answer (cpp_hashnode *, const struct answer *); | |
127 | static void handle_assertion (cpp_reader *, const char *, int); | |
d481b69b | 128 | |
168d3732 ZW |
129 | /* This is the table of directive handlers. It is ordered by |
130 | frequency of occurrence; the numbers at the end are directive | |
131 | counts from all the source code I have lying around (egcs and libc | |
132 | CVS as of 1999-05-18, plus grub-0.5.91, linux-2.2.9, and | |
93c80368 | 133 | pcmcia-cs-3.0.9). This is no longer important as directive lookup |
899015a0 TT |
134 | is now O(1). All extensions other than #warning, #include_next, |
135 | and #import are deprecated. The name is where the extension | |
136 | appears to have come from. */ | |
168d3732 | 137 | |
93c80368 NB |
138 | #define DIRECTIVE_TABLE \ |
139 | D(define, T_DEFINE = 0, KANDR, IN_I) /* 270554 */ \ | |
d97371e0 | 140 | D(include, T_INCLUDE, KANDR, INCL | EXPAND) /* 52262 */ \ |
93c80368 NB |
141 | D(endif, T_ENDIF, KANDR, COND) /* 45855 */ \ |
142 | D(ifdef, T_IFDEF, KANDR, COND | IF_COND) /* 22000 */ \ | |
1a76916c | 143 | D(if, T_IF, KANDR, COND | IF_COND | EXPAND) /* 18162 */ \ |
93c80368 NB |
144 | D(else, T_ELSE, KANDR, COND) /* 9863 */ \ |
145 | D(ifndef, T_IFNDEF, KANDR, COND | IF_COND) /* 9675 */ \ | |
146 | D(undef, T_UNDEF, KANDR, IN_I) /* 4837 */ \ | |
1a76916c NB |
147 | D(line, T_LINE, KANDR, EXPAND) /* 2465 */ \ |
148 | D(elif, T_ELIF, STDC89, COND | EXPAND) /* 610 */ \ | |
93c80368 NB |
149 | D(error, T_ERROR, STDC89, 0) /* 475 */ \ |
150 | D(pragma, T_PRAGMA, STDC89, IN_I) /* 195 */ \ | |
151 | D(warning, T_WARNING, EXTENSION, 0) /* 22 */ \ | |
d97371e0 | 152 | D(include_next, T_INCLUDE_NEXT, EXTENSION, INCL | EXPAND) /* 19 */ \ |
899015a0 | 153 | D(ident, T_IDENT, EXTENSION, IN_I | DEPRECATED) /* 11 */ \ |
d97371e0 | 154 | D(import, T_IMPORT, EXTENSION, INCL | EXPAND) /* 0 ObjC */ \ |
899015a0 TT |
155 | D(assert, T_ASSERT, EXTENSION, DEPRECATED) /* 0 SVR4 */ \ |
156 | D(unassert, T_UNASSERT, EXTENSION, DEPRECATED) /* 0 SVR4 */ \ | |
157 | D(sccs, T_SCCS, EXTENSION, IN_I | DEPRECATED) /* 0 SVR4? */ | |
1ed17cd5 ZW |
158 | |
159 | /* #sccs is synonymous with #ident. */ | |
160 | #define do_sccs do_ident | |
07aa0b04 | 161 | |
168d3732 ZW |
162 | /* Use the table to generate a series of prototypes, an enum for the |
163 | directive names, and an array of directive handlers. */ | |
164 | ||
6cf87ca4 | 165 | #define D(name, t, o, f) static void do_##name (cpp_reader *); |
168d3732 ZW |
166 | DIRECTIVE_TABLE |
167 | #undef D | |
168 | ||
041c3194 | 169 | #define D(n, tag, o, f) tag, |
168d3732 ZW |
170 | enum |
171 | { | |
172 | DIRECTIVE_TABLE | |
173 | N_DIRECTIVES | |
7f2935c7 | 174 | }; |
168d3732 ZW |
175 | #undef D |
176 | ||
041c3194 | 177 | #define D(name, t, origin, flags) \ |
9a238586 KG |
178 | { do_##name, (const uchar *) #name, \ |
179 | sizeof #name - 1, origin, flags }, | |
93c80368 | 180 | static const directive dtable[] = |
168d3732 ZW |
181 | { |
182 | DIRECTIVE_TABLE | |
183 | }; | |
184 | #undef D | |
185 | #undef DIRECTIVE_TABLE | |
7f2935c7 | 186 | |
dcc229e5 ZW |
187 | /* Wrapper struct directive for linemarkers. |
188 | The origin is more or less true - the original K+R cpp | |
189 | did use this notation in its preprocessed output. */ | |
190 | static const directive linemarker_dir = | |
191 | { | |
b6baa67d | 192 | do_linemarker, UC"#", 1, KANDR, IN_I |
dcc229e5 ZW |
193 | }; |
194 | ||
1a76916c | 195 | #define SEEN_EOL() (pfile->cur_token[-1].type == CPP_EOF) |
67821e3a | 196 | |
93c80368 NB |
197 | /* Skip any remaining tokens in a directive. */ |
198 | static void | |
6cf87ca4 | 199 | skip_rest_of_line (cpp_reader *pfile) |
c5a04734 | 200 | { |
93c80368 | 201 | /* Discard all stacked contexts. */ |
8128cccf | 202 | while (pfile->context->prev) |
93c80368 NB |
203 | _cpp_pop_context (pfile); |
204 | ||
b528a07e | 205 | /* Sweep up all tokens remaining on the line. */ |
345894b4 NB |
206 | if (! SEEN_EOL ()) |
207 | while (_cpp_lex_token (pfile)->type != CPP_EOF) | |
208 | ; | |
93c80368 | 209 | } |
c5a04734 | 210 | |
93c80368 NB |
211 | /* Ensure there are no stray tokens at the end of a directive. */ |
212 | static void | |
6cf87ca4 | 213 | check_eol (cpp_reader *pfile) |
93c80368 | 214 | { |
345894b4 | 215 | if (! SEEN_EOL () && _cpp_lex_token (pfile)->type != CPP_EOF) |
0527bc4e | 216 | cpp_error (pfile, CPP_DL_PEDWARN, "extra tokens at end of #%s directive", |
ebef4e8c | 217 | pfile->directive->name); |
93c80368 NB |
218 | } |
219 | ||
cbc43ae0 ILT |
220 | /* Ensure there are no stray tokens other than comments at the end of |
221 | a directive, and gather the comments. */ | |
222 | static const cpp_token ** | |
223 | check_eol_return_comments (cpp_reader *pfile) | |
224 | { | |
225 | size_t c; | |
226 | size_t capacity = 8; | |
227 | const cpp_token **buf; | |
228 | ||
229 | buf = XNEWVEC (const cpp_token *, capacity); | |
230 | c = 0; | |
231 | if (! SEEN_EOL ()) | |
232 | { | |
233 | while (1) | |
234 | { | |
235 | const cpp_token *tok; | |
236 | ||
237 | tok = _cpp_lex_token (pfile); | |
238 | if (tok->type == CPP_EOF) | |
239 | break; | |
240 | if (tok->type != CPP_COMMENT) | |
241 | cpp_error (pfile, CPP_DL_PEDWARN, | |
242 | "extra tokens at end of #%s directive", | |
243 | pfile->directive->name); | |
244 | else | |
245 | { | |
246 | if (c + 1 >= capacity) | |
247 | { | |
248 | capacity *= 2; | |
249 | buf = XRESIZEVEC (const cpp_token *, buf, capacity); | |
250 | } | |
251 | buf[c] = tok; | |
252 | ++c; | |
253 | } | |
254 | } | |
255 | } | |
256 | buf[c] = NULL; | |
257 | return buf; | |
258 | } | |
259 | ||
fe6c2db9 NB |
260 | /* Called when entering a directive, _Pragma or command-line directive. */ |
261 | static void | |
6cf87ca4 | 262 | start_directive (cpp_reader *pfile) |
93c80368 | 263 | { |
7f2f1a66 NB |
264 | /* Setup in-directive state. */ |
265 | pfile->state.in_directive = 1; | |
266 | pfile->state.save_comments = 0; | |
21b11495 | 267 | pfile->directive_result.type = CPP_PADDING; |
7f2f1a66 | 268 | |
93c80368 | 269 | /* Some handlers need the position of the # for diagnostics. */ |
500bee0a | 270 | pfile->directive_line = pfile->line_table->highest_line; |
fe6c2db9 NB |
271 | } |
272 | ||
273 | /* Called when leaving a directive, _Pragma or command-line directive. */ | |
274 | static void | |
6cf87ca4 | 275 | end_directive (cpp_reader *pfile, int skip_line) |
fe6c2db9 | 276 | { |
bc4071dd RH |
277 | if (pfile->state.in_deferred_pragma) |
278 | ; | |
279 | else if (CPP_OPTION (pfile, traditional)) | |
1a76916c | 280 | { |
d97371e0 NB |
281 | /* Revert change of prepare_directive_trad. */ |
282 | pfile->state.prevent_expansion--; | |
283 | ||
b66377c1 | 284 | if (pfile->directive != &dtable[T_DEFINE]) |
1a76916c NB |
285 | _cpp_remove_overlay (pfile); |
286 | } | |
fe6c2db9 | 287 | /* We don't skip for an assembler #. */ |
b66377c1 | 288 | else if (skip_line) |
67821e3a NB |
289 | { |
290 | skip_rest_of_line (pfile); | |
bdcbe496 NB |
291 | if (!pfile->keep_tokens) |
292 | { | |
293 | pfile->cur_run = &pfile->base_run; | |
294 | pfile->cur_token = pfile->base_run.base; | |
295 | } | |
67821e3a | 296 | } |
fe6c2db9 NB |
297 | |
298 | /* Restore state. */ | |
fe6c2db9 NB |
299 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
300 | pfile->state.in_directive = 0; | |
d97371e0 | 301 | pfile->state.in_expression = 0; |
fe6c2db9 NB |
302 | pfile->state.angled_headers = 0; |
303 | pfile->directive = 0; | |
304 | } | |
305 | ||
1a76916c NB |
306 | /* Prepare to handle the directive in pfile->directive. */ |
307 | static void | |
6cf87ca4 | 308 | prepare_directive_trad (cpp_reader *pfile) |
1a76916c | 309 | { |
951a0766 | 310 | if (pfile->directive != &dtable[T_DEFINE]) |
1a76916c | 311 | { |
b66377c1 NB |
312 | bool no_expand = (pfile->directive |
313 | && ! (pfile->directive->flags & EXPAND)); | |
974c43f1 | 314 | bool was_skipping = pfile->state.skipping; |
1a76916c | 315 | |
d97371e0 NB |
316 | pfile->state.in_expression = (pfile->directive == &dtable[T_IF] |
317 | || pfile->directive == &dtable[T_ELIF]); | |
45f2492c NB |
318 | if (pfile->state.in_expression) |
319 | pfile->state.skipping = false; | |
320 | ||
1a76916c NB |
321 | if (no_expand) |
322 | pfile->state.prevent_expansion++; | |
43839642 | 323 | _cpp_scan_out_logical_line (pfile, NULL); |
1a76916c NB |
324 | if (no_expand) |
325 | pfile->state.prevent_expansion--; | |
45f2492c | 326 | |
974c43f1 | 327 | pfile->state.skipping = was_skipping; |
1a76916c NB |
328 | _cpp_overlay_buffer (pfile, pfile->out.base, |
329 | pfile->out.cur - pfile->out.base); | |
330 | } | |
d97371e0 NB |
331 | |
332 | /* Stop ISO C from expanding anything. */ | |
333 | pfile->state.prevent_expansion++; | |
1a76916c NB |
334 | } |
335 | ||
da7d8304 | 336 | /* Output diagnostics for a directive DIR. INDENTED is nonzero if |
18a9d8ff | 337 | the '#' was indented. */ |
18a9d8ff | 338 | static void |
6cf87ca4 | 339 | directive_diagnostics (cpp_reader *pfile, const directive *dir, int indented) |
18a9d8ff | 340 | { |
899015a0 TT |
341 | /* Issue -pedantic or deprecated warnings for extensions. We let |
342 | -pedantic take precedence if both are applicable. */ | |
343 | if (! pfile->state.skipping) | |
344 | { | |
345 | if (dir->origin == EXTENSION | |
346 | && !(dir == &dtable[T_IMPORT] && CPP_OPTION (pfile, objc)) | |
347 | && CPP_PEDANTIC (pfile)) | |
348 | cpp_error (pfile, CPP_DL_PEDWARN, "#%s is a GCC extension", dir->name); | |
349 | else if (((dir->flags & DEPRECATED) != 0 | |
350 | || (dir == &dtable[T_IMPORT] && !CPP_OPTION (pfile, objc))) | |
351 | && CPP_OPTION (pfile, warn_deprecated)) | |
352 | cpp_error (pfile, CPP_DL_WARNING, "#%s is a deprecated GCC extension", | |
353 | dir->name); | |
354 | } | |
dcc229e5 ZW |
355 | |
356 | /* Traditionally, a directive is ignored unless its # is in | |
357 | column 1. Therefore in code intended to work with K+R | |
358 | compilers, directives added by C89 must have their # | |
359 | indented, and directives present in traditional C must not. | |
360 | This is true even of directives in skipped conditional | |
361 | blocks. #elif cannot be used at all. */ | |
362 | if (CPP_WTRADITIONAL (pfile)) | |
18a9d8ff | 363 | { |
dcc229e5 | 364 | if (dir == &dtable[T_ELIF]) |
0527bc4e | 365 | cpp_error (pfile, CPP_DL_WARNING, |
ebef4e8c | 366 | "suggest not using #elif in traditional C"); |
dcc229e5 | 367 | else if (indented && dir->origin == KANDR) |
0527bc4e | 368 | cpp_error (pfile, CPP_DL_WARNING, |
ebef4e8c NB |
369 | "traditional C ignores #%s with the # indented", |
370 | dir->name); | |
dcc229e5 | 371 | else if (!indented && dir->origin != KANDR) |
0527bc4e | 372 | cpp_error (pfile, CPP_DL_WARNING, |
ebef4e8c NB |
373 | "suggest hiding #%s from traditional C with an indented #", |
374 | dir->name); | |
18a9d8ff NB |
375 | } |
376 | } | |
377 | ||
da7d8304 | 378 | /* Check if we have a known directive. INDENTED is nonzero if the |
18a9d8ff | 379 | '#' of the directive was indented. This function is in this file |
a2566ae9 | 380 | to save unnecessarily exporting dtable etc. to lex.c. Returns |
da7d8304 | 381 | nonzero if the line of tokens has been handled, zero if we should |
18a9d8ff | 382 | continue processing the line. */ |
fe6c2db9 | 383 | int |
6cf87ca4 | 384 | _cpp_handle_directive (cpp_reader *pfile, int indented) |
fe6c2db9 | 385 | { |
fe6c2db9 | 386 | const directive *dir = 0; |
345894b4 | 387 | const cpp_token *dname; |
e808ec9c | 388 | bool was_parsing_args = pfile->state.parsing_args; |
c6e83800 | 389 | bool was_discarding_output = pfile->state.discarding_output; |
fe6c2db9 NB |
390 | int skip = 1; |
391 | ||
c6e83800 ZW |
392 | if (was_discarding_output) |
393 | pfile->state.prevent_expansion = 0; | |
394 | ||
e808ec9c NB |
395 | if (was_parsing_args) |
396 | { | |
397 | if (CPP_OPTION (pfile, pedantic)) | |
0527bc4e | 398 | cpp_error (pfile, CPP_DL_PEDWARN, |
e808ec9c NB |
399 | "embedding a directive within macro arguments is not portable"); |
400 | pfile->state.parsing_args = 0; | |
401 | pfile->state.prevent_expansion = 0; | |
402 | } | |
fe6c2db9 | 403 | start_directive (pfile); |
345894b4 | 404 | dname = _cpp_lex_token (pfile); |
0d9f234d | 405 | |
345894b4 | 406 | if (dname->type == CPP_NAME) |
0d9f234d | 407 | { |
4977bab6 ZW |
408 | if (dname->val.node->is_directive) |
409 | dir = &dtable[dname->val.node->directive_index]; | |
0d9f234d | 410 | } |
05713b80 | 411 | /* We do not recognize the # followed by a number extension in |
18a9d8ff | 412 | assembler code. */ |
345894b4 | 413 | else if (dname->type == CPP_NUMBER && CPP_OPTION (pfile, lang) != CLK_ASM) |
0d9f234d | 414 | { |
dcc229e5 ZW |
415 | dir = &linemarker_dir; |
416 | if (CPP_PEDANTIC (pfile) && ! CPP_OPTION (pfile, preprocessed) | |
417 | && ! pfile->state.skipping) | |
0527bc4e | 418 | cpp_error (pfile, CPP_DL_PEDWARN, |
ebef4e8c | 419 | "style of line directive is a GCC extension"); |
93c80368 | 420 | } |
0d9f234d | 421 | |
93c80368 NB |
422 | if (dir) |
423 | { | |
18a9d8ff NB |
424 | /* If we have a directive that is not an opening conditional, |
425 | invalidate any control macro. */ | |
426 | if (! (dir->flags & IF_COND)) | |
427 | pfile->mi_valid = false; | |
428 | ||
429 | /* Kluge alert. In order to be sure that code like this | |
430 | ||
431 | #define HASH # | |
432 | HASH define foo bar | |
433 | ||
434 | does not cause '#define foo bar' to get executed when | |
435 | compiled with -save-temps, we recognize directives in | |
a2566ae9 | 436 | -fpreprocessed mode only if the # is in column 1. macro.c |
ccfc4c91 OW |
437 | puts a space in front of any '#' at the start of a macro. |
438 | ||
439 | We exclude the -fdirectives-only case because macro expansion | |
440 | has not been performed yet, and block comments can cause spaces | |
441 | to preceed the directive. */ | |
18a9d8ff | 442 | if (CPP_OPTION (pfile, preprocessed) |
ccfc4c91 | 443 | && !CPP_OPTION (pfile, directives_only) |
18a9d8ff | 444 | && (indented || !(dir->flags & IN_I))) |
6d4587f7 | 445 | { |
18a9d8ff NB |
446 | skip = 0; |
447 | dir = 0; | |
6d4587f7 ZW |
448 | } |
449 | else | |
93c80368 | 450 | { |
18a9d8ff NB |
451 | /* In failed conditional groups, all non-conditional |
452 | directives are ignored. Before doing that, whether | |
453 | skipping or not, we should lex angle-bracketed headers | |
454 | correctly, and maybe output some diagnostics. */ | |
455 | pfile->state.angled_headers = dir->flags & INCL; | |
a8d0ddaf | 456 | pfile->state.directive_wants_padding = dir->flags & INCL; |
18a9d8ff NB |
457 | if (! CPP_OPTION (pfile, preprocessed)) |
458 | directive_diagnostics (pfile, dir, indented); | |
459 | if (pfile->state.skipping && !(dir->flags & COND)) | |
460 | dir = 0; | |
93c80368 NB |
461 | } |
462 | } | |
345894b4 | 463 | else if (dname->type == CPP_EOF) |
18a9d8ff NB |
464 | ; /* CPP_EOF is the "null directive". */ |
465 | else | |
93c80368 NB |
466 | { |
467 | /* An unknown directive. Don't complain about it in assembly | |
468 | source: we don't know where the comments are, and # may | |
469 | introduce assembler pseudo-ops. Don't complain about invalid | |
470 | directives in skipped conditional groups (6.10 p4). */ | |
bdb05a7b | 471 | if (CPP_OPTION (pfile, lang) == CLK_ASM) |
18a9d8ff NB |
472 | skip = 0; |
473 | else if (!pfile->state.skipping) | |
0527bc4e | 474 | cpp_error (pfile, CPP_DL_ERROR, "invalid preprocessing directive #%s", |
345894b4 | 475 | cpp_token_as_text (pfile, dname)); |
0d9f234d NB |
476 | } |
477 | ||
d1a58688 NB |
478 | pfile->directive = dir; |
479 | if (CPP_OPTION (pfile, traditional)) | |
480 | prepare_directive_trad (pfile); | |
481 | ||
18a9d8ff | 482 | if (dir) |
6cf87ca4 | 483 | pfile->directive->handler (pfile); |
18a9d8ff NB |
484 | else if (skip == 0) |
485 | _cpp_backup_tokens (pfile, 1); | |
486 | ||
487 | end_directive (pfile, skip); | |
765d600a | 488 | if (was_parsing_args && !pfile->state.in_deferred_pragma) |
e808ec9c NB |
489 | { |
490 | /* Restore state when within macro args. */ | |
491 | pfile->state.parsing_args = 2; | |
492 | pfile->state.prevent_expansion = 1; | |
e808ec9c | 493 | } |
c6e83800 ZW |
494 | if (was_discarding_output) |
495 | pfile->state.prevent_expansion = 1; | |
fe6c2db9 | 496 | return skip; |
041c3194 | 497 | } |
7f2935c7 | 498 | |
93c80368 | 499 | /* Directive handler wrapper used by the command line option |
26aea073 | 500 | processor. BUF is \n terminated. */ |
93c80368 | 501 | static void |
6cf87ca4 | 502 | run_directive (cpp_reader *pfile, int dir_no, const char *buf, size_t count) |
3fdc651f | 503 | { |
562a5c27 | 504 | cpp_push_buffer (pfile, (const uchar *) buf, count, |
40de9f76 | 505 | /* from_stage3 */ true); |
0bda4760 | 506 | start_directive (pfile); |
26aea073 NB |
507 | |
508 | /* This is a short-term fix to prevent a leading '#' being | |
509 | interpreted as a directive. */ | |
510 | _cpp_clean_line (pfile); | |
511 | ||
f71aebba | 512 | pfile->directive = &dtable[dir_no]; |
1a76916c NB |
513 | if (CPP_OPTION (pfile, traditional)) |
514 | prepare_directive_trad (pfile); | |
6cf87ca4 | 515 | pfile->directive->handler (pfile); |
0bda4760 | 516 | end_directive (pfile, 1); |
ef6e958a | 517 | _cpp_pop_buffer (pfile); |
93c80368 NB |
518 | } |
519 | ||
520 | /* Checks for validity the macro name in #define, #undef, #ifdef and | |
ee1c2a10 TT |
521 | #ifndef directives. IS_DEF_OR_UNDEF is true if this call is |
522 | processing a #define or #undefine directive, and false | |
523 | otherwise. */ | |
041c3194 | 524 | static cpp_hashnode * |
ee1c2a10 | 525 | lex_macro_node (cpp_reader *pfile, bool is_def_or_undef) |
041c3194 | 526 | { |
1a76916c | 527 | const cpp_token *token = _cpp_lex_token (pfile); |
ea4a453b | 528 | |
92936ecf | 529 | /* The token immediately after #define must be an identifier. That |
b8363a24 ZW |
530 | identifier may not be "defined", per C99 6.10.8p4. |
531 | In C++, it may not be any of the "named operators" either, | |
532 | per C++98 [lex.digraph], [lex.key]. | |
533 | Finally, the identifier may not have been poisoned. (In that case | |
1d63a28a | 534 | the lexer has issued the error message for us.) */ |
cbc69f84 | 535 | |
1a76916c NB |
536 | if (token->type == CPP_NAME) |
537 | { | |
538 | cpp_hashnode *node = token->val.node; | |
92936ecf | 539 | |
ee1c2a10 | 540 | if (is_def_or_undef && node == pfile->spec_nodes.n_defined) |
0527bc4e | 541 | cpp_error (pfile, CPP_DL_ERROR, |
1a76916c NB |
542 | "\"defined\" cannot be used as a macro name"); |
543 | else if (! (node->flags & NODE_POISONED)) | |
544 | return node; | |
ba89d661 | 545 | } |
1a76916c | 546 | else if (token->flags & NAMED_OP) |
0527bc4e | 547 | cpp_error (pfile, CPP_DL_ERROR, |
cbc69f84 | 548 | "\"%s\" cannot be used as a macro name as it is an operator in C++", |
1a76916c NB |
549 | NODE_NAME (token->val.node)); |
550 | else if (token->type == CPP_EOF) | |
0527bc4e | 551 | cpp_error (pfile, CPP_DL_ERROR, "no macro name given in #%s directive", |
1a76916c NB |
552 | pfile->directive->name); |
553 | else | |
0527bc4e | 554 | cpp_error (pfile, CPP_DL_ERROR, "macro names must be identifiers"); |
07aa0b04 | 555 | |
cbc69f84 | 556 | return NULL; |
7f2935c7 | 557 | } |
7f2935c7 | 558 | |
a2566ae9 | 559 | /* Process a #define directive. Most work is done in macro.c. */ |
711b8824 | 560 | static void |
6cf87ca4 | 561 | do_define (cpp_reader *pfile) |
7f2935c7 | 562 | { |
ee1c2a10 | 563 | cpp_hashnode *node = lex_macro_node (pfile, true); |
ff2b53ef | 564 | |
93c80368 NB |
565 | if (node) |
566 | { | |
1d63a28a NB |
567 | /* If we have been requested to expand comments into macros, |
568 | then re-enable saving of comments. */ | |
569 | pfile->state.save_comments = | |
570 | ! CPP_OPTION (pfile, discard_comments_in_macro_exp); | |
571 | ||
93d45d9e JM |
572 | if (pfile->cb.before_define) |
573 | pfile->cb.before_define (pfile); | |
574 | ||
93c80368 NB |
575 | if (_cpp_create_definition (pfile, node)) |
576 | if (pfile->cb.define) | |
6cf87ca4 | 577 | pfile->cb.define (pfile, pfile->directive_line, node); |
93d45d9e JM |
578 | |
579 | node->flags &= ~NODE_USED; | |
93c80368 | 580 | } |
041c3194 ZW |
581 | } |
582 | ||
5d8ebbd8 | 583 | /* Handle #undef. Mark the identifier NT_VOID in the hash table. */ |
711b8824 | 584 | static void |
6cf87ca4 | 585 | do_undef (cpp_reader *pfile) |
041c3194 | 586 | { |
ee1c2a10 | 587 | cpp_hashnode *node = lex_macro_node (pfile, true); |
9e62c811 | 588 | |
45f2492c | 589 | if (node) |
9e62c811 | 590 | { |
93d45d9e JM |
591 | if (pfile->cb.before_define) |
592 | pfile->cb.before_define (pfile); | |
593 | ||
58fea6af | 594 | if (pfile->cb.undef) |
6cf87ca4 | 595 | pfile->cb.undef (pfile, pfile->directive_line, node); |
9e62c811 | 596 | |
45f2492c NB |
597 | /* 6.10.3.5 paragraph 2: [#undef] is ignored if the specified |
598 | identifier is not currently defined as a macro name. */ | |
599 | if (node->type == NT_MACRO) | |
600 | { | |
601 | if (node->flags & NODE_WARN) | |
602 | cpp_error (pfile, CPP_DL_WARNING, | |
603 | "undefining \"%s\"", NODE_NAME (node)); | |
9e62c811 | 604 | |
45f2492c NB |
605 | if (CPP_OPTION (pfile, warn_unused_macros)) |
606 | _cpp_warn_if_unused_macro (pfile, node, NULL); | |
a69cbaac | 607 | |
45f2492c NB |
608 | _cpp_free_definition (node); |
609 | } | |
9e62c811 | 610 | } |
45f2492c | 611 | |
93c80368 | 612 | check_eol (pfile); |
7f2935c7 PB |
613 | } |
614 | ||
d1bd0ded GK |
615 | /* Undefine a single macro/assertion/whatever. */ |
616 | ||
617 | static int | |
c6e83800 | 618 | undefine_macros (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *h, |
d1bd0ded GK |
619 | void *data_p ATTRIBUTE_UNUSED) |
620 | { | |
c6e83800 ZW |
621 | /* Body of _cpp_free_definition inlined here for speed. |
622 | Macros and assertions no longer have anything to free. */ | |
623 | h->type = NT_VOID; | |
93d45d9e | 624 | h->flags &= ~(NODE_POISONED|NODE_BUILTIN|NODE_DISABLED|NODE_USED); |
d1bd0ded GK |
625 | return 1; |
626 | } | |
627 | ||
628 | /* Undefine all macros and assertions. */ | |
629 | ||
630 | void | |
631 | cpp_undef_all (cpp_reader *pfile) | |
632 | { | |
633 | cpp_forall_identifiers (pfile, undefine_macros, NULL); | |
634 | } | |
635 | ||
636 | ||
93c80368 NB |
637 | /* Helper routine used by parse_include. Reinterpret the current line |
638 | as an h-char-sequence (< ... >); we are looking at the first token | |
74eb4b3e NB |
639 | after the <. Returns a malloced filename. */ |
640 | static char * | |
6cf87ca4 | 641 | glue_header_name (cpp_reader *pfile) |
93c80368 | 642 | { |
4ed5bcfb | 643 | const cpp_token *token; |
74eb4b3e | 644 | char *buffer; |
2450e0b8 | 645 | size_t len, total_len = 0, capacity = 1024; |
93c80368 NB |
646 | |
647 | /* To avoid lexed tokens overwriting our glued name, we can only | |
648 | allocate from the string pool once we've lexed everything. */ | |
c3f829c1 | 649 | buffer = XNEWVEC (char, capacity); |
93c80368 NB |
650 | for (;;) |
651 | { | |
a8d0ddaf | 652 | token = get_token_no_padding (pfile); |
93c80368 | 653 | |
74eb4b3e | 654 | if (token->type == CPP_GREATER) |
93c80368 | 655 | break; |
74eb4b3e NB |
656 | if (token->type == CPP_EOF) |
657 | { | |
0527bc4e | 658 | cpp_error (pfile, CPP_DL_ERROR, "missing terminating > character"); |
74eb4b3e NB |
659 | break; |
660 | } | |
93c80368 | 661 | |
59325650 | 662 | len = cpp_token_len (token) + 2; /* Leading space, terminating \0. */ |
2450e0b8 | 663 | if (total_len + len > capacity) |
93c80368 | 664 | { |
2450e0b8 | 665 | capacity = (capacity + len) * 2; |
c3f829c1 | 666 | buffer = XRESIZEVEC (char, buffer, capacity); |
93c80368 NB |
667 | } |
668 | ||
4ed5bcfb | 669 | if (token->flags & PREV_WHITE) |
2450e0b8 | 670 | buffer[total_len++] = ' '; |
93c80368 | 671 | |
47e20491 GK |
672 | total_len = (cpp_spell_token (pfile, token, (uchar *) &buffer[total_len], |
673 | true) | |
74eb4b3e | 674 | - (uchar *) buffer); |
93c80368 | 675 | } |
041c3194 | 676 | |
74eb4b3e NB |
677 | buffer[total_len] = '\0'; |
678 | return buffer; | |
93c80368 | 679 | } |
7f2935c7 | 680 | |
74eb4b3e NB |
681 | /* Returns the file name of #include, #include_next, #import and |
682 | #pragma dependency. The string is malloced and the caller should | |
683 | free it. Returns NULL on error. */ | |
684 | static const char * | |
cbc43ae0 ILT |
685 | parse_include (cpp_reader *pfile, int *pangle_brackets, |
686 | const cpp_token ***buf) | |
7f2935c7 | 687 | { |
74eb4b3e | 688 | char *fname; |
4ed5bcfb | 689 | const cpp_token *header; |
7f2935c7 | 690 | |
93c80368 | 691 | /* Allow macro expansion. */ |
a8d0ddaf | 692 | header = get_token_no_padding (pfile); |
74eb4b3e | 693 | if (header->type == CPP_STRING || header->type == CPP_HEADER_NAME) |
7f2935c7 | 694 | { |
c3f829c1 | 695 | fname = XNEWVEC (char, header->val.str.len - 1); |
6338b358 NB |
696 | memcpy (fname, header->val.str.text + 1, header->val.str.len - 2); |
697 | fname[header->val.str.len - 2] = '\0'; | |
74eb4b3e | 698 | *pangle_brackets = header->type == CPP_HEADER_NAME; |
7f2935c7 | 699 | } |
74eb4b3e | 700 | else if (header->type == CPP_LESS) |
7f2935c7 | 701 | { |
74eb4b3e NB |
702 | fname = glue_header_name (pfile); |
703 | *pangle_brackets = 1; | |
704 | } | |
705 | else | |
706 | { | |
707 | const unsigned char *dir; | |
708 | ||
709 | if (pfile->directive == &dtable[T_PRAGMA]) | |
b6baa67d | 710 | dir = UC"pragma dependency"; |
74eb4b3e NB |
711 | else |
712 | dir = pfile->directive->name; | |
0527bc4e | 713 | cpp_error (pfile, CPP_DL_ERROR, "#%s expects \"FILENAME\" or <FILENAME>", |
74eb4b3e NB |
714 | dir); |
715 | ||
4ed5bcfb | 716 | return NULL; |
7f2935c7 | 717 | } |
7f2935c7 | 718 | |
cda5e672 TT |
719 | if (pfile->directive == &dtable[T_PRAGMA]) |
720 | { | |
721 | /* This pragma allows extra tokens after the file name. */ | |
722 | } | |
723 | else if (buf == NULL || CPP_OPTION (pfile, discard_comments)) | |
cbc43ae0 ILT |
724 | check_eol (pfile); |
725 | else | |
726 | { | |
727 | /* If we are not discarding comments, then gather them while | |
728 | doing the eol check. */ | |
729 | *buf = check_eol_return_comments (pfile); | |
730 | } | |
731 | ||
74eb4b3e | 732 | return fname; |
168d3732 | 733 | } |
3caee4a8 | 734 | |
ba133c96 | 735 | /* Handle #include, #include_next and #import. */ |
711b8824 | 736 | static void |
6cf87ca4 | 737 | do_include_common (cpp_reader *pfile, enum include_type type) |
168d3732 | 738 | { |
74eb4b3e NB |
739 | const char *fname; |
740 | int angle_brackets; | |
cbc43ae0 ILT |
741 | const cpp_token **buf = NULL; |
742 | ||
743 | /* Re-enable saving of comments if requested, so that the include | |
744 | callback can dump comments which follow #include. */ | |
745 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
74eb4b3e | 746 | |
cbc43ae0 | 747 | fname = parse_include (pfile, &angle_brackets, &buf); |
74eb4b3e | 748 | if (!fname) |
cbc43ae0 ILT |
749 | { |
750 | if (buf) | |
751 | XDELETEVEC (buf); | |
752 | return; | |
753 | } | |
7f2935c7 | 754 | |
28303828 NN |
755 | if (!*fname) |
756 | { | |
757 | cpp_error (pfile, CPP_DL_ERROR, "empty filename in #%s", | |
758 | pfile->directive->name); | |
cbc43ae0 ILT |
759 | XDELETEVEC (fname); |
760 | if (buf) | |
761 | XDELETEVEC (buf); | |
28303828 NN |
762 | return; |
763 | } | |
764 | ||
3963c2e0 | 765 | /* Prevent #include recursion. */ |
50f59cd7 | 766 | if (pfile->line_table->depth >= CPP_STACK_MAX) |
0527bc4e | 767 | cpp_error (pfile, CPP_DL_ERROR, "#include nested too deeply"); |
74eb4b3e | 768 | else |
09b82253 | 769 | { |
74eb4b3e NB |
770 | /* Get out of macro context, if we are. */ |
771 | skip_rest_of_line (pfile); | |
09b82253 | 772 | |
74eb4b3e | 773 | if (pfile->cb.include) |
6cf87ca4 | 774 | pfile->cb.include (pfile, pfile->directive_line, |
cbc43ae0 ILT |
775 | pfile->directive->name, fname, angle_brackets, |
776 | buf); | |
3963c2e0 | 777 | |
8f9b4009 | 778 | _cpp_stack_include (pfile, fname, angle_brackets, type); |
74eb4b3e | 779 | } |
3963c2e0 | 780 | |
cbc43ae0 ILT |
781 | XDELETEVEC (fname); |
782 | if (buf) | |
783 | XDELETEVEC (buf); | |
168d3732 | 784 | } |
e8037d57 | 785 | |
711b8824 | 786 | static void |
6cf87ca4 | 787 | do_include (cpp_reader *pfile) |
168d3732 | 788 | { |
ba133c96 NB |
789 | do_include_common (pfile, IT_INCLUDE); |
790 | } | |
168d3732 | 791 | |
ba133c96 | 792 | static void |
6cf87ca4 | 793 | do_import (cpp_reader *pfile) |
ba133c96 | 794 | { |
ba133c96 | 795 | do_include_common (pfile, IT_IMPORT); |
168d3732 | 796 | } |
7f2935c7 | 797 | |
711b8824 | 798 | static void |
6cf87ca4 | 799 | do_include_next (cpp_reader *pfile) |
168d3732 | 800 | { |
3963c2e0 ZW |
801 | enum include_type type = IT_INCLUDE_NEXT; |
802 | ||
803 | /* If this is the primary source file, warn and use the normal | |
804 | search logic. */ | |
705e2d28 | 805 | if (cpp_in_primary_file (pfile)) |
3963c2e0 | 806 | { |
0527bc4e | 807 | cpp_error (pfile, CPP_DL_WARNING, |
3963c2e0 ZW |
808 | "#include_next in primary source file"); |
809 | type = IT_INCLUDE; | |
810 | } | |
811 | do_include_common (pfile, type); | |
7f2935c7 | 812 | } |
7f2935c7 | 813 | |
dcc229e5 ZW |
814 | /* Subroutine of do_linemarker. Read possible flags after file name. |
815 | LAST is the last flag seen; 0 if this is the first flag. Return the | |
816 | flag if it is valid, 0 at the end of the directive. Otherwise | |
817 | complain. */ | |
642ce434 | 818 | static unsigned int |
6cf87ca4 | 819 | read_flag (cpp_reader *pfile, unsigned int last) |
d3a34a0a | 820 | { |
345894b4 | 821 | const cpp_token *token = _cpp_lex_token (pfile); |
d3a34a0a | 822 | |
345894b4 | 823 | if (token->type == CPP_NUMBER && token->val.str.len == 1) |
d3a34a0a | 824 | { |
345894b4 | 825 | unsigned int flag = token->val.str.text[0] - '0'; |
28e0f040 NB |
826 | |
827 | if (flag > last && flag <= 4 | |
828 | && (flag != 4 || last == 3) | |
829 | && (flag != 2 || last == 0)) | |
830 | return flag; | |
d3a34a0a | 831 | } |
93c80368 | 832 | |
345894b4 | 833 | if (token->type != CPP_EOF) |
0527bc4e | 834 | cpp_error (pfile, CPP_DL_ERROR, "invalid flag \"%s\" in line directive", |
345894b4 | 835 | cpp_token_as_text (pfile, token)); |
93c80368 | 836 | return 0; |
d3a34a0a JM |
837 | } |
838 | ||
dcc229e5 ZW |
839 | /* Subroutine of do_line and do_linemarker. Convert a number in STR, |
840 | of length LEN, to binary; store it in NUMP, and return 0 if the | |
841 | number was well-formed, 1 if not. Temporary, hopefully. */ | |
041c3194 | 842 | static int |
6cf87ca4 | 843 | strtoul_for_line (const uchar *str, unsigned int len, long unsigned int *nump) |
041c3194 ZW |
844 | { |
845 | unsigned long reg = 0; | |
562a5c27 | 846 | uchar c; |
041c3194 ZW |
847 | while (len--) |
848 | { | |
849 | c = *str++; | |
850 | if (!ISDIGIT (c)) | |
851 | return 1; | |
852 | reg *= 10; | |
853 | reg += c - '0'; | |
854 | } | |
855 | *nump = reg; | |
856 | return 0; | |
857 | } | |
858 | ||
6de1e2a9 | 859 | /* Interpret #line command. |
dcc229e5 ZW |
860 | Note that the filename string (if any) is a true string constant |
861 | (escapes are interpreted), unlike in #line. */ | |
711b8824 | 862 | static void |
6cf87ca4 | 863 | do_line (cpp_reader *pfile) |
7f2935c7 | 864 | { |
500bee0a PB |
865 | const struct line_maps *line_table = pfile->line_table; |
866 | const struct line_map *map = &line_table->maps[line_table->used - 1]; | |
2203a881 DP |
867 | |
868 | /* skip_rest_of_line() may cause line table to be realloc()ed so note down | |
869 | sysp right now. */ | |
870 | ||
871 | unsigned char map_sysp = map->sysp; | |
4ed5bcfb | 872 | const cpp_token *token; |
12f9df4e | 873 | const char *new_file = map->to_file; |
bb74c963 | 874 | unsigned long new_lineno; |
93c80368 | 875 | |
27e2564a | 876 | /* C99 raised the minimum limit on #line numbers. */ |
dcc229e5 | 877 | unsigned int cap = CPP_OPTION (pfile, c99) ? 2147483647 : 32767; |
18a9d8ff | 878 | |
93c80368 | 879 | /* #line commands expand macros. */ |
4ed5bcfb NB |
880 | token = cpp_get_token (pfile); |
881 | if (token->type != CPP_NUMBER | |
882 | || strtoul_for_line (token->val.str.text, token->val.str.len, | |
883 | &new_lineno)) | |
7f2935c7 | 884 | { |
33ae4837 TT |
885 | if (token->type == CPP_EOF) |
886 | cpp_error (pfile, CPP_DL_ERROR, "unexpected end of file after #line"); | |
887 | else | |
888 | cpp_error (pfile, CPP_DL_ERROR, | |
889 | "\"%s\" after #line is not a positive integer", | |
890 | cpp_token_as_text (pfile, token)); | |
9ec7291f | 891 | return; |
df383483 | 892 | } |
7f2935c7 | 893 | |
dcc229e5 | 894 | if (CPP_PEDANTIC (pfile) && (new_lineno == 0 || new_lineno > cap)) |
0527bc4e | 895 | cpp_error (pfile, CPP_DL_PEDWARN, "line number out of range"); |
7f2935c7 | 896 | |
4ed5bcfb NB |
897 | token = cpp_get_token (pfile); |
898 | if (token->type == CPP_STRING) | |
5538ada6 | 899 | { |
e6cc3a24 | 900 | cpp_string s = { 0, 0 }; |
423e95e2 EC |
901 | if (cpp_interpret_string_notranslate (pfile, &token->val.str, 1, |
902 | &s, false)) | |
e6cc3a24 | 903 | new_file = (const char *)s.text; |
dcc229e5 ZW |
904 | check_eol (pfile); |
905 | } | |
906 | else if (token->type != CPP_EOF) | |
907 | { | |
0527bc4e | 908 | cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", |
dcc229e5 ZW |
909 | cpp_token_as_text (pfile, token)); |
910 | return; | |
911 | } | |
912 | ||
913 | skip_rest_of_line (pfile); | |
914 | _cpp_do_file_change (pfile, LC_RENAME, new_file, new_lineno, | |
2203a881 | 915 | map_sysp); |
dcc229e5 ZW |
916 | } |
917 | ||
918 | /* Interpret the # 44 "file" [flags] notation, which has slightly | |
919 | different syntax and semantics from #line: Flags are allowed, | |
920 | and we never complain about the line number being too big. */ | |
921 | static void | |
6cf87ca4 | 922 | do_linemarker (cpp_reader *pfile) |
dcc229e5 | 923 | { |
500bee0a PB |
924 | const struct line_maps *line_table = pfile->line_table; |
925 | const struct line_map *map = &line_table->maps[line_table->used - 1]; | |
dcc229e5 | 926 | const cpp_token *token; |
12f9df4e | 927 | const char *new_file = map->to_file; |
dcc229e5 | 928 | unsigned long new_lineno; |
12f9df4e | 929 | unsigned int new_sysp = map->sysp; |
dcc229e5 ZW |
930 | enum lc_reason reason = LC_RENAME; |
931 | int flag; | |
932 | ||
933 | /* Back up so we can get the number again. Putting this in | |
934 | _cpp_handle_directive risks two calls to _cpp_backup_tokens in | |
935 | some circumstances, which can segfault. */ | |
936 | _cpp_backup_tokens (pfile, 1); | |
937 | ||
938 | /* #line commands expand macros. */ | |
939 | token = cpp_get_token (pfile); | |
940 | if (token->type != CPP_NUMBER | |
941 | || strtoul_for_line (token->val.str.text, token->val.str.len, | |
942 | &new_lineno)) | |
943 | { | |
33ae4837 TT |
944 | /* Unlike #line, there does not seem to be a way to get an EOF |
945 | here. So, it should be safe to always spell the token. */ | |
0527bc4e JDA |
946 | cpp_error (pfile, CPP_DL_ERROR, |
947 | "\"%s\" after # is not a positive integer", | |
dcc229e5 ZW |
948 | cpp_token_as_text (pfile, token)); |
949 | return; | |
df383483 | 950 | } |
941e09b6 | 951 | |
dcc229e5 ZW |
952 | token = cpp_get_token (pfile); |
953 | if (token->type == CPP_STRING) | |
954 | { | |
e6cc3a24 | 955 | cpp_string s = { 0, 0 }; |
423e95e2 EC |
956 | if (cpp_interpret_string_notranslate (pfile, &token->val.str, |
957 | 1, &s, false)) | |
e6cc3a24 | 958 | new_file = (const char *)s.text; |
cf551fba | 959 | |
dcc229e5 ZW |
960 | new_sysp = 0; |
961 | flag = read_flag (pfile, 0); | |
962 | if (flag == 1) | |
963 | { | |
964 | reason = LC_ENTER; | |
965 | /* Fake an include for cpp_included (). */ | |
966 | _cpp_fake_include (pfile, new_file); | |
967 | flag = read_flag (pfile, flag); | |
968 | } | |
969 | else if (flag == 2) | |
970 | { | |
971 | reason = LC_LEAVE; | |
972 | flag = read_flag (pfile, flag); | |
973 | } | |
974 | if (flag == 3) | |
93c80368 | 975 | { |
dcc229e5 ZW |
976 | new_sysp = 1; |
977 | flag = read_flag (pfile, flag); | |
978 | if (flag == 4) | |
979 | new_sysp = 2; | |
93c80368 | 980 | } |
9d30f270 | 981 | pfile->buffer->sysp = new_sysp; |
dcc229e5 | 982 | |
fde84349 | 983 | check_eol (pfile); |
041c3194 | 984 | } |
4ed5bcfb | 985 | else if (token->type != CPP_EOF) |
27e2564a | 986 | { |
0527bc4e | 987 | cpp_error (pfile, CPP_DL_ERROR, "\"%s\" is not a valid filename", |
4ed5bcfb | 988 | cpp_token_as_text (pfile, token)); |
27e2564a NB |
989 | return; |
990 | } | |
7f2935c7 | 991 | |
bdcbe496 | 992 | skip_rest_of_line (pfile); |
bb74c963 | 993 | _cpp_do_file_change (pfile, reason, new_file, new_lineno, new_sysp); |
27e2564a NB |
994 | } |
995 | ||
67821e3a | 996 | /* Arrange the file_change callback. pfile->line has changed to |
47d89cf3 | 997 | FILE_LINE of TO_FILE, for reason REASON. SYSP is 1 for a system |
a1f300c0 | 998 | header, 2 for a system header that needs to be extern "C" protected, |
47d89cf3 | 999 | and zero otherwise. */ |
eb1f4d9d | 1000 | void |
6cf87ca4 ZW |
1001 | _cpp_do_file_change (cpp_reader *pfile, enum lc_reason reason, |
1002 | const char *to_file, unsigned int file_line, | |
1003 | unsigned int sysp) | |
27e2564a | 1004 | { |
12f9df4e PB |
1005 | const struct line_map *map = linemap_add (pfile->line_table, reason, sysp, |
1006 | to_file, file_line); | |
500bee0a PB |
1007 | if (map != NULL) |
1008 | linemap_line_start (pfile->line_table, map->to_line, 127); | |
d82fc108 | 1009 | |
eb1f4d9d | 1010 | if (pfile->cb.file_change) |
12f9df4e | 1011 | pfile->cb.file_change (pfile, map); |
7f2935c7 | 1012 | } |
941e09b6 | 1013 | |
5d8ebbd8 NB |
1014 | /* Report a warning or error detected by the program we are |
1015 | processing. Use the directive's tokens in the error message. */ | |
711b8824 | 1016 | static void |
6cf87ca4 | 1017 | do_diagnostic (cpp_reader *pfile, int code, int print_dir) |
7f2935c7 | 1018 | { |
5d6342eb TT |
1019 | const unsigned char *dir_name; |
1020 | unsigned char *line; | |
1021 | source_location src_loc = pfile->cur_token[-1].src_loc; | |
1022 | ||
1023 | if (print_dir) | |
1024 | dir_name = pfile->directive->name; | |
1025 | else | |
1026 | dir_name = NULL; | |
1027 | pfile->state.prevent_expansion++; | |
1028 | line = cpp_output_line_to_string (pfile, dir_name); | |
1029 | pfile->state.prevent_expansion--; | |
1030 | ||
1031 | cpp_error_with_line (pfile, code, src_loc, 0, "%s", line); | |
1032 | free (line); | |
7f2935c7 PB |
1033 | } |
1034 | ||
838f313b | 1035 | static void |
6cf87ca4 | 1036 | do_error (cpp_reader *pfile) |
838f313b | 1037 | { |
0527bc4e | 1038 | do_diagnostic (pfile, CPP_DL_ERROR, 1); |
838f313b | 1039 | } |
7f2935c7 | 1040 | |
711b8824 | 1041 | static void |
6cf87ca4 | 1042 | do_warning (cpp_reader *pfile) |
7f2935c7 | 1043 | { |
2f878973 | 1044 | /* We want #warning diagnostics to be emitted in system headers too. */ |
0527bc4e | 1045 | do_diagnostic (pfile, CPP_DL_WARNING_SYSHDR, 1); |
7f2935c7 PB |
1046 | } |
1047 | ||
a2a76ce7 | 1048 | /* Report program identification. */ |
711b8824 | 1049 | static void |
6cf87ca4 | 1050 | do_ident (cpp_reader *pfile) |
7f2935c7 | 1051 | { |
4ed5bcfb | 1052 | const cpp_token *str = cpp_get_token (pfile); |
58fea6af | 1053 | |
4ed5bcfb | 1054 | if (str->type != CPP_STRING) |
1ed17cd5 ZW |
1055 | cpp_error (pfile, CPP_DL_ERROR, "invalid #%s directive", |
1056 | pfile->directive->name); | |
93c80368 | 1057 | else if (pfile->cb.ident) |
6cf87ca4 | 1058 | pfile->cb.ident (pfile, pfile->directive_line, &str->val.str); |
a2a76ce7 | 1059 | |
93c80368 | 1060 | check_eol (pfile); |
7f2935c7 PB |
1061 | } |
1062 | ||
a5da89c6 NB |
1063 | /* Lookup a PRAGMA name in a singly-linked CHAIN. Returns the |
1064 | matching entry, or NULL if none is found. The returned entry could | |
1065 | be the start of a namespace chain, or a pragma. */ | |
1066 | static struct pragma_entry * | |
6cf87ca4 | 1067 | lookup_pragma_entry (struct pragma_entry *chain, const cpp_hashnode *pragma) |
82443371 | 1068 | { |
4b115ff0 NB |
1069 | while (chain && chain->pragma != pragma) |
1070 | chain = chain->next; | |
a5da89c6 NB |
1071 | |
1072 | return chain; | |
1073 | } | |
1074 | ||
bc4071dd RH |
1075 | /* Create and insert a blank pragma entry at the beginning of a |
1076 | singly-linked CHAIN. */ | |
a5da89c6 | 1077 | static struct pragma_entry * |
bc4071dd | 1078 | new_pragma_entry (cpp_reader *pfile, struct pragma_entry **chain) |
82443371 | 1079 | { |
c3f829c1 | 1080 | struct pragma_entry *new_entry; |
58fea6af | 1081 | |
c3f829c1 | 1082 | new_entry = (struct pragma_entry *) |
8c3b2693 | 1083 | _cpp_aligned_alloc (pfile, sizeof (struct pragma_entry)); |
58fea6af | 1084 | |
bc4071dd | 1085 | memset (new_entry, 0, sizeof (struct pragma_entry)); |
c3f829c1 | 1086 | new_entry->next = *chain; |
bc4071dd | 1087 | |
c3f829c1 GDR |
1088 | *chain = new_entry; |
1089 | return new_entry; | |
58fea6af | 1090 | } |
82443371 | 1091 | |
a5da89c6 | 1092 | /* Register a pragma NAME in namespace SPACE. If SPACE is null, it |
bc4071dd RH |
1093 | goes in the global namespace. */ |
1094 | static struct pragma_entry * | |
1095 | register_pragma_1 (cpp_reader *pfile, const char *space, const char *name, | |
1096 | bool allow_name_expansion) | |
82443371 | 1097 | { |
a5da89c6 NB |
1098 | struct pragma_entry **chain = &pfile->pragmas; |
1099 | struct pragma_entry *entry; | |
4b115ff0 | 1100 | const cpp_hashnode *node; |
a5da89c6 | 1101 | |
a5da89c6 | 1102 | if (space) |
58fea6af | 1103 | { |
b6baa67d | 1104 | node = cpp_lookup (pfile, UC space, strlen (space)); |
4b115ff0 | 1105 | entry = lookup_pragma_entry (*chain, node); |
a5da89c6 | 1106 | if (!entry) |
bc4071dd RH |
1107 | { |
1108 | entry = new_pragma_entry (pfile, chain); | |
1109 | entry->pragma = node; | |
1110 | entry->is_nspace = true; | |
1111 | entry->allow_expansion = allow_name_expansion; | |
1112 | } | |
a5da89c6 NB |
1113 | else if (!entry->is_nspace) |
1114 | goto clash; | |
bc4071dd RH |
1115 | else if (entry->allow_expansion != allow_name_expansion) |
1116 | { | |
1117 | cpp_error (pfile, CPP_DL_ICE, | |
1118 | "registering pragmas in namespace \"%s\" with mismatched " | |
1119 | "name expansion", space); | |
1120 | return NULL; | |
1121 | } | |
a5da89c6 | 1122 | chain = &entry->u.space; |
58fea6af | 1123 | } |
bc4071dd RH |
1124 | else if (allow_name_expansion) |
1125 | { | |
1126 | cpp_error (pfile, CPP_DL_ICE, | |
1127 | "registering pragma \"%s\" with name expansion " | |
1128 | "and no namespace", name); | |
1129 | return NULL; | |
1130 | } | |
58fea6af | 1131 | |
a5da89c6 | 1132 | /* Check for duplicates. */ |
b6baa67d | 1133 | node = cpp_lookup (pfile, UC name, strlen (name)); |
4b115ff0 | 1134 | entry = lookup_pragma_entry (*chain, node); |
bc4071dd | 1135 | if (entry == NULL) |
a5da89c6 | 1136 | { |
bc4071dd RH |
1137 | entry = new_pragma_entry (pfile, chain); |
1138 | entry->pragma = node; | |
1139 | return entry; | |
a5da89c6 | 1140 | } |
bc4071dd RH |
1141 | |
1142 | if (entry->is_nspace) | |
1143 | clash: | |
1144 | cpp_error (pfile, CPP_DL_ICE, | |
1145 | "registering \"%s\" as both a pragma and a pragma namespace", | |
1146 | NODE_NAME (node)); | |
1147 | else if (space) | |
1148 | cpp_error (pfile, CPP_DL_ICE, "#pragma %s %s is already registered", | |
1149 | space, name); | |
a5da89c6 | 1150 | else |
bc4071dd RH |
1151 | cpp_error (pfile, CPP_DL_ICE, "#pragma %s is already registered", name); |
1152 | ||
1153 | return NULL; | |
1154 | } | |
1155 | ||
1156 | /* Register a cpplib internal pragma SPACE NAME with HANDLER. */ | |
1157 | static void | |
1158 | register_pragma_internal (cpp_reader *pfile, const char *space, | |
1159 | const char *name, pragma_cb handler) | |
1160 | { | |
1161 | struct pragma_entry *entry; | |
1162 | ||
1163 | entry = register_pragma_1 (pfile, space, name, false); | |
1164 | entry->is_internal = true; | |
1165 | entry->u.handler = handler; | |
21b11495 ZW |
1166 | } |
1167 | ||
1168 | /* Register a pragma NAME in namespace SPACE. If SPACE is null, it | |
1169 | goes in the global namespace. HANDLER is the handler it will call, | |
b5b3e36a DJ |
1170 | which must be non-NULL. If ALLOW_EXPANSION is set, allow macro |
1171 | expansion while parsing pragma NAME. This function is exported | |
1172 | from libcpp. */ | |
21b11495 ZW |
1173 | void |
1174 | cpp_register_pragma (cpp_reader *pfile, const char *space, const char *name, | |
b5b3e36a | 1175 | pragma_cb handler, bool allow_expansion) |
21b11495 | 1176 | { |
bc4071dd RH |
1177 | struct pragma_entry *entry; |
1178 | ||
1179 | if (!handler) | |
1180 | { | |
1181 | cpp_error (pfile, CPP_DL_ICE, "registering pragma with NULL handler"); | |
1182 | return; | |
1183 | } | |
1184 | ||
1185 | entry = register_pragma_1 (pfile, space, name, false); | |
1186 | if (entry) | |
1187 | { | |
1188 | entry->allow_expansion = allow_expansion; | |
1189 | entry->u.handler = handler; | |
1190 | } | |
58fea6af | 1191 | } |
a5da89c6 | 1192 | |
bc4071dd RH |
1193 | /* Similarly, but create mark the pragma for deferred processing. |
1194 | When found, a CPP_PRAGMA token will be insertted into the stream | |
1195 | with IDENT in the token->u.pragma slot. */ | |
1196 | void | |
1197 | cpp_register_deferred_pragma (cpp_reader *pfile, const char *space, | |
1198 | const char *name, unsigned int ident, | |
1199 | bool allow_expansion, bool allow_name_expansion) | |
1200 | { | |
1201 | struct pragma_entry *entry; | |
1202 | ||
1203 | entry = register_pragma_1 (pfile, space, name, allow_name_expansion); | |
1204 | if (entry) | |
1205 | { | |
1206 | entry->is_deferred = true; | |
1207 | entry->allow_expansion = allow_expansion; | |
1208 | entry->u.ident = ident; | |
1209 | } | |
1210 | } | |
1211 | ||
a5da89c6 | 1212 | /* Register the pragmas the preprocessor itself handles. */ |
58fea6af | 1213 | void |
6cf87ca4 | 1214 | _cpp_init_internal_pragmas (cpp_reader *pfile) |
58fea6af | 1215 | { |
a5da89c6 | 1216 | /* Pragmas in the global namespace. */ |
bc4071dd | 1217 | register_pragma_internal (pfile, 0, "once", do_pragma_once); |
58fea6af | 1218 | |
a5da89c6 | 1219 | /* New GCC-specific pragmas should be put in the GCC namespace. */ |
bc4071dd RH |
1220 | register_pragma_internal (pfile, "GCC", "poison", do_pragma_poison); |
1221 | register_pragma_internal (pfile, "GCC", "system_header", | |
1222 | do_pragma_system_header); | |
1223 | register_pragma_internal (pfile, "GCC", "dependency", do_pragma_dependency); | |
82443371 | 1224 | } |
7f2935c7 | 1225 | |
17211ab5 GK |
1226 | /* Return the number of registered pragmas in PE. */ |
1227 | ||
1228 | static int | |
6cf87ca4 | 1229 | count_registered_pragmas (struct pragma_entry *pe) |
17211ab5 GK |
1230 | { |
1231 | int ct = 0; | |
1232 | for (; pe != NULL; pe = pe->next) | |
1233 | { | |
1234 | if (pe->is_nspace) | |
1235 | ct += count_registered_pragmas (pe->u.space); | |
1236 | ct++; | |
1237 | } | |
1238 | return ct; | |
1239 | } | |
1240 | ||
1241 | /* Save into SD the names of the registered pragmas referenced by PE, | |
1242 | and return a pointer to the next free space in SD. */ | |
1243 | ||
1244 | static char ** | |
6cf87ca4 | 1245 | save_registered_pragmas (struct pragma_entry *pe, char **sd) |
17211ab5 GK |
1246 | { |
1247 | for (; pe != NULL; pe = pe->next) | |
1248 | { | |
1249 | if (pe->is_nspace) | |
1250 | sd = save_registered_pragmas (pe->u.space, sd); | |
c3f829c1 GDR |
1251 | *sd++ = (char *) xmemdup (HT_STR (&pe->pragma->ident), |
1252 | HT_LEN (&pe->pragma->ident), | |
1253 | HT_LEN (&pe->pragma->ident) + 1); | |
17211ab5 GK |
1254 | } |
1255 | return sd; | |
1256 | } | |
1257 | ||
1258 | /* Return a newly-allocated array which saves the names of the | |
1259 | registered pragmas. */ | |
1260 | ||
1261 | char ** | |
6cf87ca4 | 1262 | _cpp_save_pragma_names (cpp_reader *pfile) |
17211ab5 GK |
1263 | { |
1264 | int ct = count_registered_pragmas (pfile->pragmas); | |
72bb2c39 | 1265 | char **result = XNEWVEC (char *, ct); |
17211ab5 GK |
1266 | (void) save_registered_pragmas (pfile->pragmas, result); |
1267 | return result; | |
1268 | } | |
1269 | ||
1270 | /* Restore from SD the names of the registered pragmas referenced by PE, | |
1271 | and return a pointer to the next unused name in SD. */ | |
1272 | ||
1273 | static char ** | |
6cf87ca4 ZW |
1274 | restore_registered_pragmas (cpp_reader *pfile, struct pragma_entry *pe, |
1275 | char **sd) | |
17211ab5 GK |
1276 | { |
1277 | for (; pe != NULL; pe = pe->next) | |
1278 | { | |
1279 | if (pe->is_nspace) | |
1280 | sd = restore_registered_pragmas (pfile, pe->u.space, sd); | |
b6baa67d | 1281 | pe->pragma = cpp_lookup (pfile, UC *sd, strlen (*sd)); |
17211ab5 GK |
1282 | free (*sd); |
1283 | sd++; | |
1284 | } | |
1285 | return sd; | |
1286 | } | |
1287 | ||
1288 | /* Restore the names of the registered pragmas from SAVED. */ | |
1289 | ||
1290 | void | |
6cf87ca4 | 1291 | _cpp_restore_pragma_names (cpp_reader *pfile, char **saved) |
17211ab5 GK |
1292 | { |
1293 | (void) restore_registered_pragmas (pfile, pfile->pragmas, saved); | |
1294 | free (saved); | |
1295 | } | |
1296 | ||
a5da89c6 NB |
1297 | /* Pragmata handling. We handle some, and pass the rest on to the |
1298 | front end. C99 defines three pragmas and says that no macro | |
1299 | expansion is to be performed on them; whether or not macro | |
1300 | expansion happens for other pragmas is implementation defined. | |
bc4071dd RH |
1301 | This implementation allows for a mix of both, since GCC did not |
1302 | traditionally macro expand its (few) pragmas, whereas OpenMP | |
1303 | specifies that macro expansion should happen. */ | |
711b8824 | 1304 | static void |
6cf87ca4 | 1305 | do_pragma (cpp_reader *pfile) |
7f2935c7 | 1306 | { |
a5da89c6 | 1307 | const struct pragma_entry *p = NULL; |
e2e1fa50 | 1308 | const cpp_token *token, *pragma_token = pfile->cur_token; |
1c90c6f9 | 1309 | cpp_token ns_token; |
a5da89c6 | 1310 | unsigned int count = 1; |
add7091b | 1311 | |
93c80368 | 1312 | pfile->state.prevent_expansion++; |
58fea6af | 1313 | |
4ed5bcfb | 1314 | token = cpp_get_token (pfile); |
1c90c6f9 | 1315 | ns_token = *token; |
4ed5bcfb | 1316 | if (token->type == CPP_NAME) |
0172e2bc | 1317 | { |
4b115ff0 | 1318 | p = lookup_pragma_entry (pfile->pragmas, token->val.node); |
a5da89c6 | 1319 | if (p && p->is_nspace) |
58fea6af | 1320 | { |
bc4071dd RH |
1321 | bool allow_name_expansion = p->allow_expansion; |
1322 | if (allow_name_expansion) | |
1323 | pfile->state.prevent_expansion--; | |
a5da89c6 NB |
1324 | token = cpp_get_token (pfile); |
1325 | if (token->type == CPP_NAME) | |
4b115ff0 | 1326 | p = lookup_pragma_entry (p->u.space, token->val.node); |
a5da89c6 NB |
1327 | else |
1328 | p = NULL; | |
bc4071dd RH |
1329 | if (allow_name_expansion) |
1330 | pfile->state.prevent_expansion++; | |
1331 | count = 2; | |
58fea6af | 1332 | } |
58fea6af | 1333 | } |
041c3194 | 1334 | |
3da3d587 | 1335 | if (p) |
e2e1fa50 | 1336 | { |
bc4071dd RH |
1337 | if (p->is_deferred) |
1338 | { | |
1339 | pfile->directive_result.src_loc = pragma_token->src_loc; | |
1340 | pfile->directive_result.type = CPP_PRAGMA; | |
1341 | pfile->directive_result.flags = pragma_token->flags; | |
1342 | pfile->directive_result.val.pragma = p->u.ident; | |
1343 | pfile->state.in_deferred_pragma = true; | |
1344 | pfile->state.pragma_allow_expansion = p->allow_expansion; | |
1345 | if (!p->allow_expansion) | |
1346 | pfile->state.prevent_expansion++; | |
1347 | } | |
1348 | else | |
3da3d587 | 1349 | { |
bc4071dd RH |
1350 | /* Since the handler below doesn't get the line number, that |
1351 | it might need for diagnostics, make sure it has the right | |
3da3d587 ZW |
1352 | numbers in place. */ |
1353 | if (pfile->cb.line_change) | |
1354 | (*pfile->cb.line_change) (pfile, pragma_token, false); | |
bc4071dd | 1355 | if (p->allow_expansion) |
b5b3e36a | 1356 | pfile->state.prevent_expansion--; |
3da3d587 | 1357 | (*p->u.handler) (pfile); |
bc4071dd | 1358 | if (p->allow_expansion) |
b5b3e36a | 1359 | pfile->state.prevent_expansion++; |
3da3d587 | 1360 | } |
21b11495 | 1361 | } |
d82fc108 | 1362 | else if (pfile->cb.def_pragma) |
bdcbe496 | 1363 | { |
1c90c6f9 JJ |
1364 | if (count == 1 || pfile->context->prev == NULL) |
1365 | _cpp_backup_tokens (pfile, count); | |
1366 | else | |
1367 | { | |
1368 | /* Invalid name comes from macro expansion, _cpp_backup_tokens | |
1369 | won't allow backing 2 tokens. */ | |
1370 | /* ??? The token buffer is leaked. Perhaps if def_pragma hook | |
1371 | reads both tokens, we could perhaps free it, but if it doesn't, | |
1372 | we don't know the exact lifespan. */ | |
1373 | cpp_token *toks = XNEWVEC (cpp_token, 2); | |
1374 | toks[0] = ns_token; | |
1375 | toks[0].flags |= NO_EXPAND; | |
1376 | toks[1] = *token; | |
1377 | toks[1].flags |= NO_EXPAND; | |
1378 | _cpp_push_token_context (pfile, NULL, toks, 2); | |
1379 | } | |
6cf87ca4 | 1380 | pfile->cb.def_pragma (pfile, pfile->directive_line); |
bdcbe496 | 1381 | } |
a5da89c6 | 1382 | |
97293897 | 1383 | pfile->state.prevent_expansion--; |
82443371 NS |
1384 | } |
1385 | ||
5d8ebbd8 | 1386 | /* Handle #pragma once. */ |
58fea6af | 1387 | static void |
6cf87ca4 | 1388 | do_pragma_once (cpp_reader *pfile) |
a2a76ce7 | 1389 | { |
705e2d28 | 1390 | if (cpp_in_primary_file (pfile)) |
0527bc4e | 1391 | cpp_error (pfile, CPP_DL_WARNING, "#pragma once in main file"); |
93c80368 NB |
1392 | |
1393 | check_eol (pfile); | |
49634b3a | 1394 | _cpp_mark_file_once_only (pfile, pfile->buffer->file); |
a2a76ce7 | 1395 | } |
fc009f96 | 1396 | |
c3bf3e6e NB |
1397 | /* Handle #pragma GCC poison, to poison one or more identifiers so |
1398 | that the lexer produces a hard error for each subsequent usage. */ | |
58fea6af | 1399 | static void |
6cf87ca4 | 1400 | do_pragma_poison (cpp_reader *pfile) |
a2a76ce7 | 1401 | { |
345894b4 | 1402 | const cpp_token *tok; |
f8f769ea | 1403 | cpp_hashnode *hp; |
a2a76ce7 | 1404 | |
93c80368 | 1405 | pfile->state.poisoned_ok = 1; |
a2a76ce7 ZW |
1406 | for (;;) |
1407 | { | |
345894b4 NB |
1408 | tok = _cpp_lex_token (pfile); |
1409 | if (tok->type == CPP_EOF) | |
a2a76ce7 | 1410 | break; |
345894b4 | 1411 | if (tok->type != CPP_NAME) |
fc009f96 | 1412 | { |
0527bc4e JDA |
1413 | cpp_error (pfile, CPP_DL_ERROR, |
1414 | "invalid #pragma GCC poison directive"); | |
93c80368 | 1415 | break; |
fc009f96 GK |
1416 | } |
1417 | ||
345894b4 | 1418 | hp = tok->val.node; |
93c80368 NB |
1419 | if (hp->flags & NODE_POISONED) |
1420 | continue; | |
1421 | ||
1422 | if (hp->type == NT_MACRO) | |
0527bc4e | 1423 | cpp_error (pfile, CPP_DL_WARNING, "poisoning existing macro \"%s\"", |
ebef4e8c | 1424 | NODE_NAME (hp)); |
93c80368 NB |
1425 | _cpp_free_definition (hp); |
1426 | hp->flags |= NODE_POISONED | NODE_DIAGNOSTIC; | |
fc009f96 | 1427 | } |
93c80368 | 1428 | pfile->state.poisoned_ok = 0; |
7f2935c7 | 1429 | } |
2c0b35cb ZW |
1430 | |
1431 | /* Mark the current header as a system header. This will suppress | |
1432 | some categories of warnings (notably those from -pedantic). It is | |
1433 | intended for use in system libraries that cannot be implemented in | |
1434 | conforming C, but cannot be certain that their headers appear in a | |
1435 | system include directory. To prevent abuse, it is rejected in the | |
1436 | primary source file. */ | |
58fea6af | 1437 | static void |
6cf87ca4 | 1438 | do_pragma_system_header (cpp_reader *pfile) |
2c0b35cb | 1439 | { |
705e2d28 | 1440 | if (cpp_in_primary_file (pfile)) |
0527bc4e | 1441 | cpp_error (pfile, CPP_DL_WARNING, |
ebef4e8c | 1442 | "#pragma system_header ignored outside include file"); |
2c0b35cb | 1443 | else |
d82fc108 NB |
1444 | { |
1445 | check_eol (pfile); | |
bdcbe496 | 1446 | skip_rest_of_line (pfile); |
d82fc108 NB |
1447 | cpp_make_system_header (pfile, 1, 0); |
1448 | } | |
2c0b35cb | 1449 | } |
f3f751ad NS |
1450 | |
1451 | /* Check the modified date of the current include file against a specified | |
1452 | file. Issue a diagnostic, if the specified file is newer. We use this to | |
1453 | determine if a fixed header should be refixed. */ | |
58fea6af | 1454 | static void |
6cf87ca4 | 1455 | do_pragma_dependency (cpp_reader *pfile) |
f3f751ad | 1456 | { |
74eb4b3e NB |
1457 | const char *fname; |
1458 | int angle_brackets, ordering; | |
df383483 | 1459 | |
cbc43ae0 | 1460 | fname = parse_include (pfile, &angle_brackets, NULL); |
74eb4b3e | 1461 | if (!fname) |
58fea6af | 1462 | return; |
041c3194 | 1463 | |
74eb4b3e | 1464 | ordering = _cpp_compare_file_date (pfile, fname, angle_brackets); |
f3f751ad | 1465 | if (ordering < 0) |
0527bc4e | 1466 | cpp_error (pfile, CPP_DL_WARNING, "cannot find source file %s", fname); |
f3f751ad NS |
1467 | else if (ordering > 0) |
1468 | { | |
0527bc4e JDA |
1469 | cpp_error (pfile, CPP_DL_WARNING, |
1470 | "current file is older than %s", fname); | |
4ed5bcfb | 1471 | if (cpp_get_token (pfile)->type != CPP_EOF) |
bdcbe496 NB |
1472 | { |
1473 | _cpp_backup_tokens (pfile, 1); | |
0527bc4e | 1474 | do_diagnostic (pfile, CPP_DL_WARNING, 0); |
bdcbe496 | 1475 | } |
f3f751ad | 1476 | } |
74eb4b3e | 1477 | |
fad205ff | 1478 | free ((void *) fname); |
f3f751ad NS |
1479 | } |
1480 | ||
4ed5bcfb NB |
1481 | /* Get a token but skip padding. */ |
1482 | static const cpp_token * | |
6cf87ca4 | 1483 | get_token_no_padding (cpp_reader *pfile) |
a5c3cccd | 1484 | { |
4ed5bcfb NB |
1485 | for (;;) |
1486 | { | |
1487 | const cpp_token *result = cpp_get_token (pfile); | |
1488 | if (result->type != CPP_PADDING) | |
1489 | return result; | |
1490 | } | |
1491 | } | |
a5c3cccd | 1492 | |
4ed5bcfb NB |
1493 | /* Check syntax is "(string-literal)". Returns the string on success, |
1494 | or NULL on failure. */ | |
1495 | static const cpp_token * | |
6cf87ca4 | 1496 | get__Pragma_string (cpp_reader *pfile) |
4ed5bcfb NB |
1497 | { |
1498 | const cpp_token *string; | |
5b9a40df | 1499 | const cpp_token *paren; |
a5c3cccd | 1500 | |
5b9a40df TT |
1501 | paren = get_token_no_padding (pfile); |
1502 | if (paren->type == CPP_EOF) | |
1503 | _cpp_backup_tokens (pfile, 1); | |
1504 | if (paren->type != CPP_OPEN_PAREN) | |
4ed5bcfb NB |
1505 | return NULL; |
1506 | ||
1507 | string = get_token_no_padding (pfile); | |
5b9a40df TT |
1508 | if (string->type == CPP_EOF) |
1509 | _cpp_backup_tokens (pfile, 1); | |
b6baa67d KVH |
1510 | if (string->type != CPP_STRING && string->type != CPP_WSTRING |
1511 | && string->type != CPP_STRING32 && string->type != CPP_STRING16) | |
4ed5bcfb NB |
1512 | return NULL; |
1513 | ||
5b9a40df TT |
1514 | paren = get_token_no_padding (pfile); |
1515 | if (paren->type == CPP_EOF) | |
1516 | _cpp_backup_tokens (pfile, 1); | |
1517 | if (paren->type != CPP_CLOSE_PAREN) | |
4ed5bcfb | 1518 | return NULL; |
a5c3cccd | 1519 | |
4ed5bcfb | 1520 | return string; |
a5c3cccd NB |
1521 | } |
1522 | ||
87062813 NB |
1523 | /* Destringize IN into a temporary buffer, by removing the first \ of |
1524 | \" and \\ sequences, and process the result as a #pragma directive. */ | |
1525 | static void | |
6cf87ca4 | 1526 | destringize_and_run (cpp_reader *pfile, const cpp_string *in) |
a5c3cccd NB |
1527 | { |
1528 | const unsigned char *src, *limit; | |
87062813 | 1529 | char *dest, *result; |
bc4071dd RH |
1530 | cpp_context *saved_context; |
1531 | cpp_token *saved_cur_token; | |
1532 | tokenrun *saved_cur_run; | |
1533 | cpp_token *toks; | |
1534 | int count; | |
14ccf800 | 1535 | const struct directive *save_directive; |
a5c3cccd | 1536 | |
c3f829c1 | 1537 | dest = result = (char *) alloca (in->len - 1); |
6338b358 NB |
1538 | src = in->text + 1 + (in->text[0] == 'L'); |
1539 | limit = in->text + in->len - 1; | |
1540 | while (src < limit) | |
a5c3cccd NB |
1541 | { |
1542 | /* We know there is a character following the backslash. */ | |
1543 | if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
1544 | src++; | |
1545 | *dest++ = *src++; | |
1546 | } | |
26aea073 | 1547 | *dest = '\n'; |
a5c3cccd | 1548 | |
8128cccf NB |
1549 | /* Ugh; an awful kludge. We are really not set up to be lexing |
1550 | tokens when in the middle of a macro expansion. Use a new | |
1551 | context to force cpp_get_token to lex, and so skip_rest_of_line | |
1552 | doesn't go beyond the end of the text. Also, remember the | |
1553 | current lexing position so we can return to it later. | |
1554 | ||
1555 | Something like line-at-a-time lexing should remove the need for | |
1556 | this. */ | |
bc4071dd RH |
1557 | saved_context = pfile->context; |
1558 | saved_cur_token = pfile->cur_token; | |
1559 | saved_cur_run = pfile->cur_run; | |
79ba5e3b | 1560 | |
bc4071dd RH |
1561 | pfile->context = XNEW (cpp_context); |
1562 | pfile->context->macro = 0; | |
1563 | pfile->context->prev = 0; | |
1c90c6f9 | 1564 | pfile->context->next = 0; |
79ba5e3b | 1565 | |
bc4071dd RH |
1566 | /* Inline run_directive, since we need to delay the _cpp_pop_buffer |
1567 | until we've read all of the tokens that we want. */ | |
1568 | cpp_push_buffer (pfile, (const uchar *) result, dest - result, | |
1569 | /* from_stage3 */ true); | |
1570 | /* ??? Antique Disgusting Hack. What does this do? */ | |
1571 | if (pfile->buffer->prev) | |
1572 | pfile->buffer->file = pfile->buffer->prev->file; | |
79ba5e3b | 1573 | |
bc4071dd RH |
1574 | start_directive (pfile); |
1575 | _cpp_clean_line (pfile); | |
14ccf800 TT |
1576 | save_directive = pfile->directive; |
1577 | pfile->directive = &dtable[T_PRAGMA]; | |
bc4071dd RH |
1578 | do_pragma (pfile); |
1579 | end_directive (pfile, 1); | |
14ccf800 | 1580 | pfile->directive = save_directive; |
79ba5e3b | 1581 | |
bc4071dd RH |
1582 | /* We always insert at least one token, the directive result. It'll |
1583 | either be a CPP_PADDING or a CPP_PRAGMA. In the later case, we | |
1584 | need to insert *all* of the tokens, including the CPP_PRAGMA_EOL. */ | |
1585 | ||
1586 | /* If we're not handling the pragma internally, read all of the tokens from | |
1587 | the string buffer now, while the string buffer is still installed. */ | |
1588 | /* ??? Note that the token buffer allocated here is leaked. It's not clear | |
1589 | to me what the true lifespan of the tokens are. It would appear that | |
1590 | the lifespan is the entire parse of the main input stream, in which case | |
1591 | this may not be wrong. */ | |
1592 | if (pfile->directive_result.type == CPP_PRAGMA) | |
1593 | { | |
1594 | int maxcount; | |
1595 | ||
1596 | count = 1; | |
1597 | maxcount = 50; | |
1598 | toks = XNEWVEC (cpp_token, maxcount); | |
1599 | toks[0] = pfile->directive_result; | |
79ba5e3b | 1600 | |
bc4071dd RH |
1601 | do |
1602 | { | |
1603 | if (count == maxcount) | |
1604 | { | |
1605 | maxcount = maxcount * 3 / 2; | |
1606 | toks = XRESIZEVEC (cpp_token, toks, maxcount); | |
1607 | } | |
1c90c6f9 JJ |
1608 | toks[count] = *cpp_get_token (pfile); |
1609 | /* Macros have been already expanded by cpp_get_token | |
1610 | if the pragma allowed expansion. */ | |
1611 | toks[count++].flags |= NO_EXPAND; | |
bc4071dd RH |
1612 | } |
1613 | while (toks[count-1].type != CPP_PRAGMA_EOL); | |
1614 | } | |
1615 | else | |
1616 | { | |
1617 | count = 1; | |
1618 | toks = XNEW (cpp_token); | |
1619 | toks[0] = pfile->directive_result; | |
1620 | ||
1621 | /* If we handled the entire pragma internally, make sure we get the | |
1622 | line number correct for the next token. */ | |
1623 | if (pfile->cb.line_change) | |
1624 | pfile->cb.line_change (pfile, pfile->cur_token, false); | |
1625 | } | |
1626 | ||
1627 | /* Finish inlining run_directive. */ | |
1628 | pfile->buffer->file = NULL; | |
1629 | _cpp_pop_buffer (pfile); | |
1630 | ||
1631 | /* Reset the old macro state before ... */ | |
1632 | XDELETE (pfile->context); | |
1633 | pfile->context = saved_context; | |
1634 | pfile->cur_token = saved_cur_token; | |
1635 | pfile->cur_run = saved_cur_run; | |
1636 | ||
1637 | /* ... inserting the new tokens we collected. */ | |
1638 | _cpp_push_token_context (pfile, NULL, toks, count); | |
a5c3cccd NB |
1639 | } |
1640 | ||
5b9a40df TT |
1641 | /* Handle the _Pragma operator. Return 0 on error, 1 if ok. */ |
1642 | int | |
6cf87ca4 | 1643 | _cpp_do__Pragma (cpp_reader *pfile) |
a5c3cccd | 1644 | { |
4ed5bcfb | 1645 | const cpp_token *string = get__Pragma_string (pfile); |
21b11495 | 1646 | pfile->directive_result.type = CPP_PADDING; |
a5c3cccd | 1647 | |
79ba5e3b | 1648 | if (string) |
5b9a40df TT |
1649 | { |
1650 | destringize_and_run (pfile, &string->val.str); | |
1651 | return 1; | |
1652 | } | |
1653 | cpp_error (pfile, CPP_DL_ERROR, | |
1654 | "_Pragma takes a parenthesized string literal"); | |
1655 | return 0; | |
a5c3cccd | 1656 | } |
21b11495 | 1657 | |
5d8ebbd8 | 1658 | /* Handle #ifdef. */ |
711b8824 | 1659 | static void |
6cf87ca4 | 1660 | do_ifdef (cpp_reader *pfile) |
168d3732 | 1661 | { |
93c80368 | 1662 | int skip = 1; |
041c3194 | 1663 | |
cef0d199 | 1664 | if (! pfile->state.skipping) |
93c80368 | 1665 | { |
93d45d9e | 1666 | cpp_hashnode *node = lex_macro_node (pfile, false); |
041c3194 | 1667 | |
93c80368 | 1668 | if (node) |
a69cbaac NB |
1669 | { |
1670 | skip = node->type != NT_MACRO; | |
1671 | _cpp_mark_macro_used (node); | |
93d45d9e JM |
1672 | if (!(node->flags & NODE_USED)) |
1673 | { | |
1674 | node->flags |= NODE_USED; | |
1675 | if (node->type == NT_MACRO) | |
1676 | { | |
1677 | if (pfile->cb.used_define) | |
1678 | pfile->cb.used_define (pfile, pfile->directive_line, node); | |
1679 | } | |
1680 | else | |
1681 | { | |
1682 | if (pfile->cb.used_undef) | |
1683 | pfile->cb.used_undef (pfile, pfile->directive_line, node); | |
1684 | } | |
1685 | } | |
a69cbaac NB |
1686 | check_eol (pfile); |
1687 | } | |
93c80368 | 1688 | } |
168d3732 | 1689 | |
93c80368 NB |
1690 | push_conditional (pfile, skip, T_IFDEF, 0); |
1691 | } | |
168d3732 | 1692 | |
5d8ebbd8 | 1693 | /* Handle #ifndef. */ |
711b8824 | 1694 | static void |
6cf87ca4 | 1695 | do_ifndef (cpp_reader *pfile) |
168d3732 | 1696 | { |
93c80368 | 1697 | int skip = 1; |
93d45d9e | 1698 | cpp_hashnode *node = 0; |
168d3732 | 1699 | |
cef0d199 | 1700 | if (! pfile->state.skipping) |
5af7e2c2 | 1701 | { |
ee1c2a10 | 1702 | node = lex_macro_node (pfile, false); |
b43db0b3 GK |
1703 | |
1704 | if (node) | |
a69cbaac NB |
1705 | { |
1706 | skip = node->type == NT_MACRO; | |
1707 | _cpp_mark_macro_used (node); | |
93d45d9e JM |
1708 | if (!(node->flags & NODE_USED)) |
1709 | { | |
1710 | node->flags |= NODE_USED; | |
1711 | if (node->type == NT_MACRO) | |
1712 | { | |
1713 | if (pfile->cb.used_define) | |
1714 | pfile->cb.used_define (pfile, pfile->directive_line, node); | |
1715 | } | |
1716 | else | |
1717 | { | |
1718 | if (pfile->cb.used_undef) | |
1719 | pfile->cb.used_undef (pfile, pfile->directive_line, node); | |
1720 | } | |
1721 | } | |
a69cbaac NB |
1722 | check_eol (pfile); |
1723 | } | |
5af7e2c2 | 1724 | } |
041c3194 | 1725 | |
93c80368 | 1726 | push_conditional (pfile, skip, T_IFNDEF, node); |
7f2935c7 PB |
1727 | } |
1728 | ||
6d18adbc NB |
1729 | /* _cpp_parse_expr puts a macro in a "#if !defined ()" expression in |
1730 | pfile->mi_ind_cmacro so we can handle multiple-include | |
6356f892 | 1731 | optimizations. If macro expansion occurs in the expression, we |
6d18adbc NB |
1732 | cannot treat it as a controlling conditional, since the expansion |
1733 | could change in the future. That is handled by cpp_get_token. */ | |
711b8824 | 1734 | static void |
6cf87ca4 | 1735 | do_if (cpp_reader *pfile) |
7f2935c7 | 1736 | { |
93c80368 | 1737 | int skip = 1; |
7f2935c7 | 1738 | |
cef0d199 | 1739 | if (! pfile->state.skipping) |
d750887f | 1740 | skip = _cpp_parse_expr (pfile, true) == false; |
93c80368 | 1741 | |
6d18adbc | 1742 | push_conditional (pfile, skip, T_IF, pfile->mi_ind_cmacro); |
7f2935c7 PB |
1743 | } |
1744 | ||
b528a07e | 1745 | /* Flip skipping state if appropriate and continue without changing |
ea4a453b ZW |
1746 | if_stack; this is so that the error message for missing #endif's |
1747 | etc. will point to the original #if. */ | |
711b8824 | 1748 | static void |
6cf87ca4 | 1749 | do_else (cpp_reader *pfile) |
ed705a82 | 1750 | { |
b528a07e NB |
1751 | cpp_buffer *buffer = pfile->buffer; |
1752 | struct if_stack *ifs = buffer->if_stack; | |
ff2b53ef | 1753 | |
ea4a453b | 1754 | if (ifs == NULL) |
0527bc4e | 1755 | cpp_error (pfile, CPP_DL_ERROR, "#else without #if"); |
93c80368 | 1756 | else |
ff2b53ef | 1757 | { |
93c80368 NB |
1758 | if (ifs->type == T_ELSE) |
1759 | { | |
0527bc4e JDA |
1760 | cpp_error (pfile, CPP_DL_ERROR, "#else after #else"); |
1761 | cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
93c80368 NB |
1762 | "the conditional began here"); |
1763 | } | |
b528a07e NB |
1764 | ifs->type = T_ELSE; |
1765 | ||
cef0d199 NB |
1766 | /* Skip any future (erroneous) #elses or #elifs. */ |
1767 | pfile->state.skipping = ifs->skip_elses; | |
1768 | ifs->skip_elses = true; | |
7f2935c7 | 1769 | |
93c80368 NB |
1770 | /* Invalidate any controlling macro. */ |
1771 | ifs->mi_cmacro = 0; | |
93c80368 | 1772 | |
cef0d199 | 1773 | /* Only check EOL if was not originally skipping. */ |
909de5da | 1774 | if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) |
cef0d199 NB |
1775 | check_eol (pfile); |
1776 | } | |
7f2935c7 PB |
1777 | } |
1778 | ||
5d8ebbd8 | 1779 | /* Handle a #elif directive by not changing if_stack either. See the |
93c80368 | 1780 | comment above do_else. */ |
711b8824 | 1781 | static void |
6cf87ca4 | 1782 | do_elif (cpp_reader *pfile) |
7f2935c7 | 1783 | { |
b528a07e NB |
1784 | cpp_buffer *buffer = pfile->buffer; |
1785 | struct if_stack *ifs = buffer->if_stack; | |
7f2935c7 | 1786 | |
ea4a453b | 1787 | if (ifs == NULL) |
0527bc4e | 1788 | cpp_error (pfile, CPP_DL_ERROR, "#elif without #if"); |
b528a07e | 1789 | else |
40ea76de | 1790 | { |
b528a07e NB |
1791 | if (ifs->type == T_ELSE) |
1792 | { | |
0527bc4e JDA |
1793 | cpp_error (pfile, CPP_DL_ERROR, "#elif after #else"); |
1794 | cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, | |
b528a07e NB |
1795 | "the conditional began here"); |
1796 | } | |
1797 | ifs->type = T_ELIF; | |
93c80368 | 1798 | |
d750887f | 1799 | if (! ifs->was_skipping) |
b528a07e | 1800 | { |
d750887f TT |
1801 | bool value; |
1802 | /* The standard mandates that the expression be parsed even | |
1803 | if we are skipping elses at this point -- the lexical | |
1804 | restrictions on #elif only apply to skipped groups, but | |
1805 | this group is not being skipped. Temporarily set | |
1806 | skipping to false to get lexer warnings. */ | |
cef0d199 | 1807 | pfile->state.skipping = 0; |
d750887f TT |
1808 | value = _cpp_parse_expr (pfile, false); |
1809 | if (ifs->skip_elses) | |
1810 | pfile->state.skipping = 1; | |
1811 | else | |
1812 | { | |
1813 | pfile->state.skipping = ! value; | |
1814 | ifs->skip_elses = value; | |
1815 | } | |
b528a07e | 1816 | } |
cef0d199 NB |
1817 | |
1818 | /* Invalidate any controlling macro. */ | |
1819 | ifs->mi_cmacro = 0; | |
40ea76de | 1820 | } |
7f2935c7 PB |
1821 | } |
1822 | ||
cef0d199 | 1823 | /* #endif pops the if stack and resets pfile->state.skipping. */ |
711b8824 | 1824 | static void |
6cf87ca4 | 1825 | do_endif (cpp_reader *pfile) |
7f2935c7 | 1826 | { |
b528a07e NB |
1827 | cpp_buffer *buffer = pfile->buffer; |
1828 | struct if_stack *ifs = buffer->if_stack; | |
ea4a453b | 1829 | |
ea4a453b | 1830 | if (ifs == NULL) |
0527bc4e | 1831 | cpp_error (pfile, CPP_DL_ERROR, "#endif without #if"); |
7f2935c7 PB |
1832 | else |
1833 | { | |
cef0d199 | 1834 | /* Only check EOL if was not originally skipping. */ |
909de5da | 1835 | if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels)) |
cef0d199 NB |
1836 | check_eol (pfile); |
1837 | ||
93c80368 NB |
1838 | /* If potential control macro, we go back outside again. */ |
1839 | if (ifs->next == 0 && ifs->mi_cmacro) | |
1840 | { | |
6d18adbc | 1841 | pfile->mi_valid = true; |
93c80368 NB |
1842 | pfile->mi_cmacro = ifs->mi_cmacro; |
1843 | } | |
1844 | ||
b528a07e | 1845 | buffer->if_stack = ifs->next; |
cef0d199 | 1846 | pfile->state.skipping = ifs->was_skipping; |
2a967f3d | 1847 | obstack_free (&pfile->buffer_ob, ifs); |
7f2935c7 | 1848 | } |
93c80368 | 1849 | } |
041c3194 | 1850 | |
5d8ebbd8 NB |
1851 | /* Push an if_stack entry for a preprocessor conditional, and set |
1852 | pfile->state.skipping to SKIP. If TYPE indicates the conditional | |
1853 | is #if or #ifndef, CMACRO is a potentially controlling macro, and | |
1854 | we need to check here that we are at the top of the file. */ | |
ea4a453b | 1855 | static void |
6cf87ca4 ZW |
1856 | push_conditional (cpp_reader *pfile, int skip, int type, |
1857 | const cpp_hashnode *cmacro) | |
ea4a453b ZW |
1858 | { |
1859 | struct if_stack *ifs; | |
b528a07e | 1860 | cpp_buffer *buffer = pfile->buffer; |
ea4a453b | 1861 | |
72bb2c39 | 1862 | ifs = XOBNEW (&pfile->buffer_ob, struct if_stack); |
50410426 | 1863 | ifs->line = pfile->directive_line; |
b528a07e | 1864 | ifs->next = buffer->if_stack; |
cef0d199 NB |
1865 | ifs->skip_elses = pfile->state.skipping || !skip; |
1866 | ifs->was_skipping = pfile->state.skipping; | |
ea4a453b | 1867 | ifs->type = type; |
6d18adbc NB |
1868 | /* This condition is effectively a test for top-of-file. */ |
1869 | if (pfile->mi_valid && pfile->mi_cmacro == 0) | |
93c80368 NB |
1870 | ifs->mi_cmacro = cmacro; |
1871 | else | |
1872 | ifs->mi_cmacro = 0; | |
ea4a453b | 1873 | |
cef0d199 | 1874 | pfile->state.skipping = skip; |
b528a07e | 1875 | buffer->if_stack = ifs; |
782331f4 | 1876 | } |
7061aa5a | 1877 | |
5d8ebbd8 NB |
1878 | /* Read the tokens of the answer into the macro pool, in a directive |
1879 | of type TYPE. Only commit the memory if we intend it as permanent | |
1880 | storage, i.e. the #assert case. Returns 0 on success, and sets | |
1881 | ANSWERP to point to the answer. */ | |
93c80368 | 1882 | static int |
6cf87ca4 | 1883 | parse_answer (cpp_reader *pfile, struct answer **answerp, int type) |
7f2935c7 | 1884 | { |
4ed5bcfb | 1885 | const cpp_token *paren; |
93c80368 | 1886 | struct answer *answer; |
8c3b2693 | 1887 | unsigned int acount; |
93c80368 NB |
1888 | |
1889 | /* In a conditional, it is legal to not have an open paren. We | |
1890 | should save the following token in this case. */ | |
4ed5bcfb | 1891 | paren = cpp_get_token (pfile); |
93c80368 NB |
1892 | |
1893 | /* If not a paren, see if we're OK. */ | |
4ed5bcfb | 1894 | if (paren->type != CPP_OPEN_PAREN) |
041c3194 | 1895 | { |
93c80368 NB |
1896 | /* In a conditional no answer is a test for any answer. It |
1897 | could be followed by any token. */ | |
1898 | if (type == T_IF) | |
bdcbe496 NB |
1899 | { |
1900 | _cpp_backup_tokens (pfile, 1); | |
1901 | return 0; | |
1902 | } | |
93c80368 NB |
1903 | |
1904 | /* #unassert with no answer is valid - it removes all answers. */ | |
4ed5bcfb | 1905 | if (type == T_UNASSERT && paren->type == CPP_EOF) |
93c80368 | 1906 | return 0; |
15dad1d9 | 1907 | |
0527bc4e | 1908 | cpp_error (pfile, CPP_DL_ERROR, "missing '(' after predicate"); |
93c80368 | 1909 | return 1; |
041c3194 | 1910 | } |
7061aa5a | 1911 | |
8c3b2693 | 1912 | for (acount = 0;; acount++) |
041c3194 | 1913 | { |
8c3b2693 NB |
1914 | size_t room_needed; |
1915 | const cpp_token *token = cpp_get_token (pfile); | |
1916 | cpp_token *dest; | |
93c80368 | 1917 | |
041c3194 ZW |
1918 | if (token->type == CPP_CLOSE_PAREN) |
1919 | break; | |
a7abcbbf | 1920 | |
93c80368 | 1921 | if (token->type == CPP_EOF) |
041c3194 | 1922 | { |
0527bc4e | 1923 | cpp_error (pfile, CPP_DL_ERROR, "missing ')' to complete answer"); |
93c80368 | 1924 | return 1; |
041c3194 | 1925 | } |
8c3b2693 NB |
1926 | |
1927 | /* struct answer includes the space for one token. */ | |
1928 | room_needed = (sizeof (struct answer) + acount * sizeof (cpp_token)); | |
1929 | ||
1930 | if (BUFF_ROOM (pfile->a_buff) < room_needed) | |
1931 | _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (struct answer)); | |
1932 | ||
1933 | dest = &((struct answer *) BUFF_FRONT (pfile->a_buff))->first[acount]; | |
1934 | *dest = *token; | |
1935 | ||
1936 | /* Drop whitespace at start, for answer equivalence purposes. */ | |
1937 | if (acount == 0) | |
1938 | dest->flags &= ~PREV_WHITE; | |
041c3194 | 1939 | } |
15dad1d9 | 1940 | |
8c3b2693 | 1941 | if (acount == 0) |
7061aa5a | 1942 | { |
0527bc4e | 1943 | cpp_error (pfile, CPP_DL_ERROR, "predicate's answer is empty"); |
93c80368 | 1944 | return 1; |
7f2935c7 | 1945 | } |
041c3194 | 1946 | |
8c3b2693 NB |
1947 | answer = (struct answer *) BUFF_FRONT (pfile->a_buff); |
1948 | answer->count = acount; | |
1949 | answer->next = NULL; | |
93c80368 | 1950 | *answerp = answer; |
041c3194 | 1951 | |
93c80368 NB |
1952 | return 0; |
1953 | } | |
041c3194 | 1954 | |
5d8ebbd8 NB |
1955 | /* Parses an assertion directive of type TYPE, returning a pointer to |
1956 | the hash node of the predicate, or 0 on error. If an answer was | |
1957 | supplied, it is placed in ANSWERP, otherwise it is set to 0. */ | |
93c80368 | 1958 | static cpp_hashnode * |
6cf87ca4 | 1959 | parse_assertion (cpp_reader *pfile, struct answer **answerp, int type) |
93c80368 NB |
1960 | { |
1961 | cpp_hashnode *result = 0; | |
4ed5bcfb | 1962 | const cpp_token *predicate; |
93c80368 NB |
1963 | |
1964 | /* We don't expand predicates or answers. */ | |
1965 | pfile->state.prevent_expansion++; | |
1966 | ||
93c80368 | 1967 | *answerp = 0; |
4ed5bcfb NB |
1968 | predicate = cpp_get_token (pfile); |
1969 | if (predicate->type == CPP_EOF) | |
0527bc4e | 1970 | cpp_error (pfile, CPP_DL_ERROR, "assertion without predicate"); |
4ed5bcfb | 1971 | else if (predicate->type != CPP_NAME) |
0527bc4e | 1972 | cpp_error (pfile, CPP_DL_ERROR, "predicate must be an identifier"); |
93c80368 NB |
1973 | else if (parse_answer (pfile, answerp, type) == 0) |
1974 | { | |
4ed5bcfb | 1975 | unsigned int len = NODE_LEN (predicate->val.node); |
c3f829c1 | 1976 | unsigned char *sym = (unsigned char *) alloca (len + 1); |
041c3194 | 1977 | |
93c80368 NB |
1978 | /* Prefix '#' to get it out of macro namespace. */ |
1979 | sym[0] = '#'; | |
4ed5bcfb | 1980 | memcpy (sym + 1, NODE_NAME (predicate->val.node), len); |
93c80368 NB |
1981 | result = cpp_lookup (pfile, sym, len + 1); |
1982 | } | |
7061aa5a | 1983 | |
93c80368 NB |
1984 | pfile->state.prevent_expansion--; |
1985 | return result; | |
7f2935c7 | 1986 | } |
7061aa5a | 1987 | |
5d8ebbd8 | 1988 | /* Returns a pointer to the pointer to CANDIDATE in the answer chain, |
041c3194 | 1989 | or a pointer to NULL if the answer is not in the chain. */ |
93c80368 | 1990 | static struct answer ** |
6cf87ca4 | 1991 | find_answer (cpp_hashnode *node, const struct answer *candidate) |
7f2935c7 | 1992 | { |
93c80368 | 1993 | unsigned int i; |
041c3194 | 1994 | struct answer **result; |
7f2935c7 | 1995 | |
041c3194 | 1996 | for (result = &node->value.answers; *result; result = &(*result)->next) |
93c80368 NB |
1997 | { |
1998 | struct answer *answer = *result; | |
1999 | ||
2000 | if (answer->count == candidate->count) | |
2001 | { | |
2002 | for (i = 0; i < answer->count; i++) | |
2003 | if (! _cpp_equiv_tokens (&answer->first[i], &candidate->first[i])) | |
2004 | break; | |
2005 | ||
2006 | if (i == answer->count) | |
2007 | break; | |
2008 | } | |
2009 | } | |
ff2b53ef | 2010 | |
041c3194 ZW |
2011 | return result; |
2012 | } | |
15dad1d9 | 2013 | |
93c80368 | 2014 | /* Test an assertion within a preprocessor conditional. Returns |
da7d8304 | 2015 | nonzero on failure, zero on success. On success, the result of |
2402645b | 2016 | the test is written into VALUE, otherwise the value 0. */ |
93c80368 | 2017 | int |
6cf87ca4 | 2018 | _cpp_test_assertion (cpp_reader *pfile, unsigned int *value) |
93c80368 NB |
2019 | { |
2020 | struct answer *answer; | |
2021 | cpp_hashnode *node; | |
2022 | ||
2023 | node = parse_assertion (pfile, &answer, T_IF); | |
2402645b HPN |
2024 | |
2025 | /* For recovery, an erroneous assertion expression is handled as a | |
2026 | failing assertion. */ | |
2027 | *value = 0; | |
2028 | ||
93c80368 NB |
2029 | if (node) |
2030 | *value = (node->type == NT_ASSERTION && | |
2031 | (answer == 0 || *find_answer (node, answer) != 0)); | |
91318908 NB |
2032 | else if (pfile->cur_token[-1].type == CPP_EOF) |
2033 | _cpp_backup_tokens (pfile, 1); | |
93c80368 NB |
2034 | |
2035 | /* We don't commit the memory for the answer - it's temporary only. */ | |
2036 | return node == 0; | |
2037 | } | |
2038 | ||
5d8ebbd8 | 2039 | /* Handle #assert. */ |
711b8824 | 2040 | static void |
6cf87ca4 | 2041 | do_assert (cpp_reader *pfile) |
041c3194 ZW |
2042 | { |
2043 | struct answer *new_answer; | |
2044 | cpp_hashnode *node; | |
df383483 | 2045 | |
93c80368 | 2046 | node = parse_assertion (pfile, &new_answer, T_ASSERT); |
041c3194 | 2047 | if (node) |
ff2b53ef | 2048 | { |
d8044160 GK |
2049 | size_t answer_size; |
2050 | ||
93c80368 NB |
2051 | /* Place the new answer in the answer list. First check there |
2052 | is not a duplicate. */ | |
041c3194 | 2053 | new_answer->next = 0; |
93c80368 | 2054 | if (node->type == NT_ASSERTION) |
041c3194 | 2055 | { |
93c80368 NB |
2056 | if (*find_answer (node, new_answer)) |
2057 | { | |
0527bc4e | 2058 | cpp_error (pfile, CPP_DL_WARNING, "\"%s\" re-asserted", |
ebef4e8c | 2059 | NODE_NAME (node) + 1); |
93c80368 NB |
2060 | return; |
2061 | } | |
041c3194 ZW |
2062 | new_answer->next = node->value.answers; |
2063 | } | |
8c3b2693 | 2064 | |
d8044160 GK |
2065 | answer_size = sizeof (struct answer) + ((new_answer->count - 1) |
2066 | * sizeof (cpp_token)); | |
2067 | /* Commit or allocate storage for the object. */ | |
2068 | if (pfile->hash_table->alloc_subobject) | |
2069 | { | |
2070 | struct answer *temp_answer = new_answer; | |
c3f829c1 GDR |
2071 | new_answer = (struct answer *) pfile->hash_table->alloc_subobject |
2072 | (answer_size); | |
d8044160 GK |
2073 | memcpy (new_answer, temp_answer, answer_size); |
2074 | } | |
2075 | else | |
2076 | BUFF_FRONT (pfile->a_buff) += answer_size; | |
2077 | ||
93c80368 | 2078 | node->type = NT_ASSERTION; |
041c3194 | 2079 | node->value.answers = new_answer; |
8c3b2693 | 2080 | check_eol (pfile); |
ff2b53ef | 2081 | } |
041c3194 | 2082 | } |
15dad1d9 | 2083 | |
5d8ebbd8 | 2084 | /* Handle #unassert. */ |
711b8824 | 2085 | static void |
6cf87ca4 | 2086 | do_unassert (cpp_reader *pfile) |
041c3194 ZW |
2087 | { |
2088 | cpp_hashnode *node; | |
93c80368 | 2089 | struct answer *answer; |
df383483 | 2090 | |
93c80368 NB |
2091 | node = parse_assertion (pfile, &answer, T_UNASSERT); |
2092 | /* It isn't an error to #unassert something that isn't asserted. */ | |
2093 | if (node && node->type == NT_ASSERTION) | |
7061aa5a | 2094 | { |
93c80368 | 2095 | if (answer) |
15dad1d9 | 2096 | { |
93c80368 | 2097 | struct answer **p = find_answer (node, answer), *temp; |
041c3194 | 2098 | |
93c80368 NB |
2099 | /* Remove the answer from the list. */ |
2100 | temp = *p; | |
2101 | if (temp) | |
2102 | *p = temp->next; | |
a7abcbbf | 2103 | |
93c80368 NB |
2104 | /* Did we free the last answer? */ |
2105 | if (node->value.answers == 0) | |
2106 | node->type = NT_VOID; | |
8c3b2693 NB |
2107 | |
2108 | check_eol (pfile); | |
93c80368 NB |
2109 | } |
2110 | else | |
2111 | _cpp_free_definition (node); | |
041c3194 | 2112 | } |
93c80368 NB |
2113 | |
2114 | /* We don't commit the memory for the answer - it's temporary only. */ | |
7f2935c7 | 2115 | } |
7f2935c7 | 2116 | |
45b966db ZW |
2117 | /* These are for -D, -U, -A. */ |
2118 | ||
2119 | /* Process the string STR as if it appeared as the body of a #define. | |
2120 | If STR is just an identifier, define it with value 1. | |
2121 | If STR has anything after the identifier, then it should | |
ec5c56db | 2122 | be identifier=definition. */ |
0b22d65c | 2123 | void |
6cf87ca4 | 2124 | cpp_define (cpp_reader *pfile, const char *str) |
0b22d65c | 2125 | { |
45b966db ZW |
2126 | char *buf, *p; |
2127 | size_t count; | |
2128 | ||
df383483 | 2129 | /* Copy the entire option so we can modify it. |
45b966db | 2130 | Change the first "=" in the string to a space. If there is none, |
86368122 NB |
2131 | tack " 1" on the end. */ |
2132 | ||
86368122 | 2133 | count = strlen (str); |
c3f829c1 | 2134 | buf = (char *) alloca (count + 3); |
86368122 NB |
2135 | memcpy (buf, str, count); |
2136 | ||
2137 | p = strchr (str, '='); | |
45b966db | 2138 | if (p) |
86368122 | 2139 | buf[p - str] = ' '; |
45b966db ZW |
2140 | else |
2141 | { | |
86368122 NB |
2142 | buf[count++] = ' '; |
2143 | buf[count++] = '1'; | |
0b22d65c | 2144 | } |
26aea073 | 2145 | buf[count] = '\n'; |
cf4ed945 | 2146 | |
29401c30 | 2147 | run_directive (pfile, T_DEFINE, buf, count); |
2c8f0515 ZW |
2148 | } |
2149 | ||
28f68625 DF |
2150 | |
2151 | /* Use to build macros to be run through cpp_define() as | |
2152 | described above. | |
2153 | Example: cpp_define_formatted (pfile, "MACRO=%d", value); */ | |
2154 | ||
2155 | void | |
2156 | cpp_define_formatted (cpp_reader *pfile, const char *fmt, ...) | |
2157 | { | |
2158 | char *ptr = NULL; | |
2159 | ||
2160 | va_list ap; | |
2161 | va_start (ap, fmt); | |
2162 | vasprintf (&ptr, fmt, ap); | |
2163 | va_end (ap); | |
2164 | ||
2165 | cpp_define (pfile, ptr); | |
2166 | free (ptr); | |
2167 | } | |
2168 | ||
2169 | ||
ad2a084d | 2170 | /* Slight variant of the above for use by initialize_builtins. */ |
2c8f0515 | 2171 | void |
6cf87ca4 | 2172 | _cpp_define_builtin (cpp_reader *pfile, const char *str) |
2c8f0515 | 2173 | { |
26aea073 | 2174 | size_t len = strlen (str); |
c3f829c1 | 2175 | char *buf = (char *) alloca (len + 1); |
26aea073 NB |
2176 | memcpy (buf, str, len); |
2177 | buf[len] = '\n'; | |
2178 | run_directive (pfile, T_DEFINE, buf, len); | |
45b966db | 2179 | } |
0f41302f | 2180 | |
45b966db ZW |
2181 | /* Process MACRO as if it appeared as the body of an #undef. */ |
2182 | void | |
6cf87ca4 | 2183 | cpp_undef (cpp_reader *pfile, const char *macro) |
7f2935c7 | 2184 | { |
26aea073 | 2185 | size_t len = strlen (macro); |
c3f829c1 | 2186 | char *buf = (char *) alloca (len + 1); |
26aea073 NB |
2187 | memcpy (buf, macro, len); |
2188 | buf[len] = '\n'; | |
2189 | run_directive (pfile, T_UNDEF, buf, len); | |
7f2935c7 PB |
2190 | } |
2191 | ||
121de39f RH |
2192 | /* Like lex_macro_node, but read the input from STR. */ |
2193 | static cpp_hashnode * | |
2194 | lex_macro_node_from_str (cpp_reader *pfile, const char *str) | |
2195 | { | |
2196 | size_t len = strlen (str); | |
4cd97075 | 2197 | uchar *buf = (uchar *) alloca (len + 1); |
121de39f RH |
2198 | cpp_hashnode *node; |
2199 | ||
2200 | memcpy (buf, str, len); | |
2201 | buf[len] = '\n'; | |
2202 | cpp_push_buffer (pfile, buf, len, true); | |
2203 | node = lex_macro_node (pfile, true); | |
2204 | _cpp_pop_buffer (pfile); | |
2205 | ||
2206 | return node; | |
2207 | } | |
2208 | ||
2209 | /* If STR is a defined macro, return its definition node, else return NULL. */ | |
2210 | cpp_macro * | |
2211 | cpp_push_definition (cpp_reader *pfile, const char *str) | |
2212 | { | |
2213 | cpp_hashnode *node = lex_macro_node_from_str (pfile, str); | |
2214 | if (node && node->type == NT_MACRO) | |
2215 | return node->value.macro; | |
2216 | else | |
2217 | return NULL; | |
2218 | } | |
2219 | ||
2220 | /* Replace a previous definition DFN of the macro STR. If DFN is NULL, | |
2221 | then the macro should be undefined. */ | |
2222 | void | |
2223 | cpp_pop_definition (cpp_reader *pfile, const char *str, cpp_macro *dfn) | |
2224 | { | |
2225 | cpp_hashnode *node = lex_macro_node_from_str (pfile, str); | |
2226 | if (node == NULL) | |
2227 | return; | |
2228 | ||
93d45d9e JM |
2229 | if (pfile->cb.before_define) |
2230 | pfile->cb.before_define (pfile); | |
2231 | ||
121de39f RH |
2232 | if (node->type == NT_MACRO) |
2233 | { | |
2234 | if (pfile->cb.undef) | |
2235 | pfile->cb.undef (pfile, pfile->directive_line, node); | |
2236 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
2237 | _cpp_warn_if_unused_macro (pfile, node, NULL); | |
2238 | } | |
2239 | if (node->type != NT_VOID) | |
2240 | _cpp_free_definition (node); | |
2241 | ||
2242 | if (dfn) | |
2243 | { | |
2244 | node->type = NT_MACRO; | |
2245 | node->value.macro = dfn; | |
2246 | if (! ustrncmp (NODE_NAME (node), DSC ("__STDC_"))) | |
2247 | node->flags |= NODE_WARN; | |
2248 | ||
2249 | if (pfile->cb.define) | |
2250 | pfile->cb.define (pfile, pfile->directive_line, node); | |
2251 | } | |
2252 | } | |
2253 | ||
ec5c56db | 2254 | /* Process the string STR as if it appeared as the body of a #assert. */ |
45b966db | 2255 | void |
6cf87ca4 | 2256 | cpp_assert (cpp_reader *pfile, const char *str) |
45b966db | 2257 | { |
86368122 | 2258 | handle_assertion (pfile, str, T_ASSERT); |
45b966db | 2259 | } |
7f2935c7 | 2260 | |
ec5c56db | 2261 | /* Process STR as if it appeared as the body of an #unassert. */ |
45b966db | 2262 | void |
6cf87ca4 | 2263 | cpp_unassert (cpp_reader *pfile, const char *str) |
7f2935c7 | 2264 | { |
86368122 | 2265 | handle_assertion (pfile, str, T_UNASSERT); |
df383483 | 2266 | } |
3fdc651f | 2267 | |
86368122 NB |
2268 | /* Common code for cpp_assert (-A) and cpp_unassert (-A-). */ |
2269 | static void | |
6cf87ca4 | 2270 | handle_assertion (cpp_reader *pfile, const char *str, int type) |
86368122 NB |
2271 | { |
2272 | size_t count = strlen (str); | |
2273 | const char *p = strchr (str, '='); | |
2274 | ||
26aea073 NB |
2275 | /* Copy the entire option so we can modify it. Change the first |
2276 | "=" in the string to a '(', and tack a ')' on the end. */ | |
c3f829c1 | 2277 | char *buf = (char *) alloca (count + 2); |
26aea073 NB |
2278 | |
2279 | memcpy (buf, str, count); | |
86368122 NB |
2280 | if (p) |
2281 | { | |
86368122 NB |
2282 | buf[p - str] = '('; |
2283 | buf[count++] = ')'; | |
86368122 | 2284 | } |
26aea073 NB |
2285 | buf[count] = '\n'; |
2286 | str = buf; | |
86368122 | 2287 | |
29401c30 | 2288 | run_directive (pfile, type, str, count); |
86368122 NB |
2289 | } |
2290 | ||
7e96d768 NB |
2291 | /* The number of errors for a given reader. */ |
2292 | unsigned int | |
6cf87ca4 | 2293 | cpp_errors (cpp_reader *pfile) |
7e96d768 NB |
2294 | { |
2295 | return pfile->errors; | |
2296 | } | |
2297 | ||
2298 | /* The options structure. */ | |
2299 | cpp_options * | |
6cf87ca4 | 2300 | cpp_get_options (cpp_reader *pfile) |
7e96d768 NB |
2301 | { |
2302 | return &pfile->opts; | |
2303 | } | |
2304 | ||
2305 | /* The callbacks structure. */ | |
2306 | cpp_callbacks * | |
6cf87ca4 | 2307 | cpp_get_callbacks (cpp_reader *pfile) |
7e96d768 NB |
2308 | { |
2309 | return &pfile->cb; | |
2310 | } | |
2311 | ||
2312 | /* Copy the given callbacks structure to our own. */ | |
2313 | void | |
6cf87ca4 | 2314 | cpp_set_callbacks (cpp_reader *pfile, cpp_callbacks *cb) |
7e96d768 NB |
2315 | { |
2316 | pfile->cb = *cb; | |
2317 | } | |
2318 | ||
c6e83800 ZW |
2319 | /* The dependencies structure. (Creates one if it hasn't already been.) */ |
2320 | struct deps * | |
2321 | cpp_get_deps (cpp_reader *pfile) | |
2322 | { | |
2323 | if (!pfile->deps) | |
2324 | pfile->deps = deps_init (); | |
2325 | return pfile->deps; | |
2326 | } | |
2327 | ||
eb1f4d9d NB |
2328 | /* Push a new buffer on the buffer stack. Returns the new buffer; it |
2329 | doesn't fail. It does not generate a file change call back; that | |
2330 | is the responsibility of the caller. */ | |
c71f835b | 2331 | cpp_buffer * |
6cf87ca4 | 2332 | cpp_push_buffer (cpp_reader *pfile, const uchar *buffer, size_t len, |
40de9f76 | 2333 | int from_stage3) |
c71f835b | 2334 | { |
c3f829c1 | 2335 | cpp_buffer *new_buffer = XOBNEW (&pfile->buffer_ob, cpp_buffer); |
93c80368 | 2336 | |
fde84349 | 2337 | /* Clears, amongst other things, if_stack and mi_cmacro. */ |
c3f829c1 | 2338 | memset (new_buffer, 0, sizeof (cpp_buffer)); |
fde84349 | 2339 | |
c3f829c1 GDR |
2340 | new_buffer->next_line = new_buffer->buf = buffer; |
2341 | new_buffer->rlimit = buffer + len; | |
2342 | new_buffer->from_stage3 = from_stage3; | |
2343 | new_buffer->prev = pfile->buffer; | |
2344 | new_buffer->need_line = true; | |
0bda4760 | 2345 | |
c3f829c1 | 2346 | pfile->buffer = new_buffer; |
cf551fba | 2347 | |
c3f829c1 | 2348 | return new_buffer; |
c71f835b ZW |
2349 | } |
2350 | ||
af0d16cd NB |
2351 | /* Pops a single buffer, with a file change call-back if appropriate. |
2352 | Then pushes the next -include file, if any remain. */ | |
ef6e958a | 2353 | void |
6cf87ca4 | 2354 | _cpp_pop_buffer (cpp_reader *pfile) |
c71f835b | 2355 | { |
fde84349 | 2356 | cpp_buffer *buffer = pfile->buffer; |
8f9b4009 | 2357 | struct _cpp_file *inc = buffer->file; |
ad2a084d | 2358 | struct if_stack *ifs; |
c71f835b | 2359 | |
fde84349 NB |
2360 | /* Walk back up the conditional stack till we reach its level at |
2361 | entry to this file, issuing error messages. */ | |
2362 | for (ifs = buffer->if_stack; ifs; ifs = ifs->next) | |
0527bc4e | 2363 | cpp_error_with_line (pfile, CPP_DL_ERROR, ifs->line, 0, |
fde84349 | 2364 | "unterminated #%s", dtable[ifs->type].name); |
eb1f4d9d | 2365 | |
97293897 | 2366 | /* In case of a missing #endif. */ |
67821e3a | 2367 | pfile->state.skipping = 0; |
29401c30 | 2368 | |
af0d16cd | 2369 | /* _cpp_do_file_change expects pfile->buffer to be the new one. */ |
29401c30 NB |
2370 | pfile->buffer = buffer->prev; |
2371 | ||
26aea073 NB |
2372 | free (buffer->notes); |
2373 | ||
af0d16cd NB |
2374 | /* Free the buffer object now; we may want to push a new buffer |
2375 | in _cpp_push_next_include_file. */ | |
2376 | obstack_free (&pfile->buffer_ob, buffer); | |
29401c30 | 2377 | |
af0d16cd NB |
2378 | if (inc) |
2379 | { | |
2380 | _cpp_pop_file_buffer (pfile, inc); | |
2381 | ||
40de9f76 | 2382 | _cpp_do_file_change (pfile, LC_LEAVE, 0, 0, 0); |
af0d16cd | 2383 | } |
c71f835b ZW |
2384 | } |
2385 | ||
05713b80 | 2386 | /* Enter all recognized directives in the hash table. */ |
c71f835b | 2387 | void |
6cf87ca4 | 2388 | _cpp_init_directives (cpp_reader *pfile) |
c71f835b | 2389 | { |
766ee681 | 2390 | unsigned int i; |
93c80368 | 2391 | cpp_hashnode *node; |
bfb9dc7f | 2392 | |
37b8524c | 2393 | for (i = 0; i < (unsigned int) N_DIRECTIVES; i++) |
93c80368 | 2394 | { |
766ee681 | 2395 | node = cpp_lookup (pfile, dtable[i].name, dtable[i].length); |
4977bab6 ZW |
2396 | node->is_directive = 1; |
2397 | node->directive_index = i; | |
93c80368 | 2398 | } |
c71f835b | 2399 | } |