]>
Commit | Line | Data |
---|---|---|
a949941c | 1 | /* CPP Library. (Directive handling.) |
5e7b4e25 | 2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
5d8ebbd8 | 3 | 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
4c8cc616 | 4 | Contributed by Per Bothner, 1994-95. |
d8bfa78c | 5 | Based on CCCP program by Paul Rubin, June 1986 |
7f2935c7 PB |
6 | Adapted to ANSI C, Richard Stallman, Jan 1987 |
7 | ||
8 | This program is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by the | |
10 | Free Software Foundation; either version 2, or (at your option) any | |
11 | later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
956d6950 | 20 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
7f2935c7 | 21 | |
956d6950 | 22 | #include "config.h" |
b04cd507 | 23 | #include "system.h" |
7f2935c7 | 24 | |
956d6950 JL |
25 | #include "cpplib.h" |
26 | #include "cpphash.h" | |
c71f835b | 27 | #include "obstack.h" |
7f2935c7 | 28 | |
93c80368 NB |
29 | /* Chained list of answers to an assertion. */ |
30 | struct answer | |
31 | { | |
32 | struct answer *next; | |
33 | unsigned int count; | |
34 | cpp_token first[1]; | |
35 | }; | |
36 | ||
88ae23e7 ZW |
37 | /* Stack of conditionals currently in progress |
38 | (including both successful and failing conditionals). */ | |
88ae23e7 ZW |
39 | struct if_stack |
40 | { | |
41 | struct if_stack *next; | |
50410426 | 42 | unsigned int line; /* Line where condition started. */ |
93c80368 | 43 | const cpp_hashnode *mi_cmacro;/* macro name for #ifndef around entire file */ |
cef0d199 NB |
44 | bool skip_elses; /* Can future #else / #elif be skipped? */ |
45 | bool was_skipping; /* If were skipping on entry. */ | |
46 | int type; /* Most recent conditional, for diagnostics. */ | |
88ae23e7 | 47 | }; |
88ae23e7 | 48 | |
a5da89c6 NB |
49 | /* Contains a registered pragma or pragma namespace. */ |
50 | typedef void (*pragma_cb) PARAMS ((cpp_reader *)); | |
51 | struct pragma_entry | |
52 | { | |
53 | struct pragma_entry *next; | |
4b115ff0 | 54 | const cpp_hashnode *pragma; /* Name and length. */ |
a5da89c6 NB |
55 | int is_nspace; |
56 | union { | |
57 | pragma_cb handler; | |
58 | struct pragma_entry *space; | |
59 | } u; | |
60 | }; | |
61 | ||
93c80368 NB |
62 | /* Values for the origin field of struct directive. KANDR directives |
63 | come from traditional (K&R) C. STDC89 directives come from the | |
64 | 1989 C standard. EXTENSION directives are extensions. */ | |
65 | #define KANDR 0 | |
66 | #define STDC89 1 | |
67 | #define EXTENSION 2 | |
68 | ||
69 | /* Values for the flags field of struct directive. COND indicates a | |
70 | conditional; IF_COND an opening conditional. INCL means to treat | |
71 | "..." and <...> as q-char and h-char sequences respectively. IN_I | |
72 | means this directive should be handled even if -fpreprocessed is in | |
73 | effect (these are the directives with callback hooks). */ | |
74 | #define COND (1 << 0) | |
75 | #define IF_COND (1 << 1) | |
76 | #define INCL (1 << 2) | |
77 | #define IN_I (1 << 3) | |
78 | ||
79 | /* Defines one #-directive, including how to handle it. */ | |
80 | typedef void (*directive_handler) PARAMS ((cpp_reader *)); | |
81 | typedef struct directive directive; | |
82 | struct directive | |
83 | { | |
84 | directive_handler handler; /* Function to handle directive. */ | |
85 | const U_CHAR *name; /* Name of directive. */ | |
86 | unsigned short length; /* Length of name. */ | |
87 | unsigned char origin; /* Origin of directive. */ | |
88 | unsigned char flags; /* Flags describing this directive. */ | |
89 | }; | |
90 | ||
1316f1f7 ZW |
91 | /* Forward declarations. */ |
92 | ||
93c80368 NB |
93 | static void skip_rest_of_line PARAMS ((cpp_reader *)); |
94 | static void check_eol PARAMS ((cpp_reader *)); | |
fe6c2db9 NB |
95 | static void start_directive PARAMS ((cpp_reader *)); |
96 | static void end_directive PARAMS ((cpp_reader *, int)); | |
18a9d8ff NB |
97 | static void directive_diagnostics |
98 | PARAMS ((cpp_reader *, const directive *, int)); | |
93c80368 | 99 | static void run_directive PARAMS ((cpp_reader *, int, |
0bda4760 | 100 | const char *, size_t)); |
4ed5bcfb NB |
101 | static const cpp_token *glue_header_name PARAMS ((cpp_reader *)); |
102 | static const cpp_token *parse_include PARAMS ((cpp_reader *)); | |
041c3194 ZW |
103 | static void push_conditional PARAMS ((cpp_reader *, int, int, |
104 | const cpp_hashnode *)); | |
28e0f040 | 105 | static unsigned int read_flag PARAMS ((cpp_reader *, unsigned int)); |
dcc229e5 ZW |
106 | static U_CHAR *dequote_string PARAMS ((cpp_reader *, const U_CHAR *, |
107 | unsigned int)); | |
c71f835b | 108 | static int strtoul_for_line PARAMS ((const U_CHAR *, unsigned int, |
041c3194 | 109 | unsigned long *)); |
29b10746 | 110 | static void do_diagnostic PARAMS ((cpp_reader *, enum error_type, int)); |
b528a07e | 111 | static cpp_hashnode *lex_macro_node PARAMS ((cpp_reader *)); |
ba133c96 | 112 | static void do_include_common PARAMS ((cpp_reader *, enum include_type)); |
a5da89c6 | 113 | static struct pragma_entry *lookup_pragma_entry |
4b115ff0 | 114 | PARAMS ((struct pragma_entry *, const cpp_hashnode *pragma)); |
a5da89c6 | 115 | static struct pragma_entry *insert_pragma_entry |
4b115ff0 NB |
116 | PARAMS ((cpp_reader *, struct pragma_entry **, const cpp_hashnode *, |
117 | pragma_cb)); | |
93c80368 NB |
118 | static void do_pragma_once PARAMS ((cpp_reader *)); |
119 | static void do_pragma_poison PARAMS ((cpp_reader *)); | |
120 | static void do_pragma_system_header PARAMS ((cpp_reader *)); | |
121 | static void do_pragma_dependency PARAMS ((cpp_reader *)); | |
dcc229e5 | 122 | static void do_linemarker PARAMS ((cpp_reader *)); |
4ed5bcfb NB |
123 | static const cpp_token *get_token_no_padding PARAMS ((cpp_reader *)); |
124 | static const cpp_token *get__Pragma_string PARAMS ((cpp_reader *)); | |
87062813 | 125 | static void destringize_and_run PARAMS ((cpp_reader *, const cpp_string *)); |
93c80368 NB |
126 | static int parse_answer PARAMS ((cpp_reader *, struct answer **, int)); |
127 | static cpp_hashnode *parse_assertion PARAMS ((cpp_reader *, struct answer **, | |
128 | int)); | |
129 | static struct answer ** find_answer PARAMS ((cpp_hashnode *, | |
130 | const struct answer *)); | |
86368122 | 131 | static void handle_assertion PARAMS ((cpp_reader *, const char *, int)); |
d481b69b | 132 | |
168d3732 ZW |
133 | /* This is the table of directive handlers. It is ordered by |
134 | frequency of occurrence; the numbers at the end are directive | |
135 | counts from all the source code I have lying around (egcs and libc | |
136 | CVS as of 1999-05-18, plus grub-0.5.91, linux-2.2.9, and | |
93c80368 NB |
137 | pcmcia-cs-3.0.9). This is no longer important as directive lookup |
138 | is now O(1). All extensions other than #warning and #include_next | |
139 | are deprecated. The name is where the extension appears to have | |
140 | come from. */ | |
168d3732 | 141 | |
93c80368 NB |
142 | #define DIRECTIVE_TABLE \ |
143 | D(define, T_DEFINE = 0, KANDR, IN_I) /* 270554 */ \ | |
144 | D(include, T_INCLUDE, KANDR, INCL) /* 52262 */ \ | |
145 | D(endif, T_ENDIF, KANDR, COND) /* 45855 */ \ | |
146 | D(ifdef, T_IFDEF, KANDR, COND | IF_COND) /* 22000 */ \ | |
147 | D(if, T_IF, KANDR, COND | IF_COND) /* 18162 */ \ | |
148 | D(else, T_ELSE, KANDR, COND) /* 9863 */ \ | |
149 | D(ifndef, T_IFNDEF, KANDR, COND | IF_COND) /* 9675 */ \ | |
150 | D(undef, T_UNDEF, KANDR, IN_I) /* 4837 */ \ | |
dcc229e5 | 151 | D(line, T_LINE, KANDR, 0) /* 2465 */ \ |
f000294d | 152 | D(elif, T_ELIF, STDC89, COND) /* 610 */ \ |
93c80368 NB |
153 | D(error, T_ERROR, STDC89, 0) /* 475 */ \ |
154 | D(pragma, T_PRAGMA, STDC89, IN_I) /* 195 */ \ | |
155 | D(warning, T_WARNING, EXTENSION, 0) /* 22 */ \ | |
156 | D(include_next, T_INCLUDE_NEXT, EXTENSION, INCL) /* 19 */ \ | |
157 | D(ident, T_IDENT, EXTENSION, IN_I) /* 11 */ \ | |
158 | D(import, T_IMPORT, EXTENSION, INCL) /* 0 ObjC */ \ | |
159 | D(assert, T_ASSERT, EXTENSION, 0) /* 0 SVR4 */ \ | |
160 | D(unassert, T_UNASSERT, EXTENSION, 0) /* 0 SVR4 */ \ | |
161 | SCCS_ENTRY /* 0 SVR4? */ | |
168d3732 | 162 | |
07aa0b04 ZW |
163 | /* #sccs is not always recognized. */ |
164 | #ifdef SCCS_DIRECTIVE | |
041c3194 | 165 | # define SCCS_ENTRY D(sccs, T_SCCS, EXTENSION, 0) |
07aa0b04 ZW |
166 | #else |
167 | # define SCCS_ENTRY /* nothing */ | |
168 | #endif | |
169 | ||
168d3732 ZW |
170 | /* Use the table to generate a series of prototypes, an enum for the |
171 | directive names, and an array of directive handlers. */ | |
172 | ||
ec5c56db | 173 | /* Don't invoke CONCAT2 with any whitespace or K&R cc will fail. */ |
711b8824 | 174 | #define D(name, t, o, f) static void CONCAT2(do_,name) PARAMS ((cpp_reader *)); |
168d3732 ZW |
175 | DIRECTIVE_TABLE |
176 | #undef D | |
177 | ||
041c3194 | 178 | #define D(n, tag, o, f) tag, |
168d3732 ZW |
179 | enum |
180 | { | |
181 | DIRECTIVE_TABLE | |
182 | N_DIRECTIVES | |
7f2935c7 | 183 | }; |
168d3732 ZW |
184 | #undef D |
185 | ||
ec5c56db | 186 | /* Don't invoke CONCAT2 with any whitespace or K&R cc will fail. */ |
041c3194 | 187 | #define D(name, t, origin, flags) \ |
12cf91fe | 188 | { CONCAT2(do_,name), (const U_CHAR *) STRINGX(name), \ |
041c3194 | 189 | sizeof STRINGX(name) - 1, origin, flags }, |
93c80368 | 190 | static const directive dtable[] = |
168d3732 ZW |
191 | { |
192 | DIRECTIVE_TABLE | |
193 | }; | |
194 | #undef D | |
195 | #undef DIRECTIVE_TABLE | |
7f2935c7 | 196 | |
dcc229e5 ZW |
197 | /* Wrapper struct directive for linemarkers. |
198 | The origin is more or less true - the original K+R cpp | |
199 | did use this notation in its preprocessed output. */ | |
200 | static const directive linemarker_dir = | |
201 | { | |
202 | do_linemarker, U"#", 1, KANDR, IN_I | |
203 | }; | |
204 | ||
bdcbe496 | 205 | #define SEEN_EOL() (pfile->cur_token[-1].type == CPP_EOF) |
67821e3a | 206 | |
93c80368 NB |
207 | /* Skip any remaining tokens in a directive. */ |
208 | static void | |
209 | skip_rest_of_line (pfile) | |
041c3194 | 210 | cpp_reader *pfile; |
c5a04734 | 211 | { |
93c80368 NB |
212 | /* Discard all stacked contexts. */ |
213 | while (pfile->context != &pfile->base_context) | |
214 | _cpp_pop_context (pfile); | |
215 | ||
b528a07e | 216 | /* Sweep up all tokens remaining on the line. */ |
345894b4 NB |
217 | if (! SEEN_EOL ()) |
218 | while (_cpp_lex_token (pfile)->type != CPP_EOF) | |
219 | ; | |
93c80368 | 220 | } |
c5a04734 | 221 | |
93c80368 NB |
222 | /* Ensure there are no stray tokens at the end of a directive. */ |
223 | static void | |
224 | check_eol (pfile) | |
225 | cpp_reader *pfile; | |
226 | { | |
345894b4 NB |
227 | if (! SEEN_EOL () && _cpp_lex_token (pfile)->type != CPP_EOF) |
228 | cpp_pedwarn (pfile, "extra tokens at end of #%s directive", | |
229 | pfile->directive->name); | |
93c80368 NB |
230 | } |
231 | ||
fe6c2db9 NB |
232 | /* Called when entering a directive, _Pragma or command-line directive. */ |
233 | static void | |
234 | start_directive (pfile) | |
93c80368 | 235 | cpp_reader *pfile; |
93c80368 | 236 | { |
7f2f1a66 NB |
237 | /* Setup in-directive state. */ |
238 | pfile->state.in_directive = 1; | |
239 | pfile->state.save_comments = 0; | |
240 | ||
93c80368 | 241 | /* Some handlers need the position of the # for diagnostics. */ |
8bbbef34 | 242 | pfile->directive_line = pfile->line; |
fe6c2db9 NB |
243 | } |
244 | ||
245 | /* Called when leaving a directive, _Pragma or command-line directive. */ | |
246 | static void | |
247 | end_directive (pfile, skip_line) | |
248 | cpp_reader *pfile; | |
249 | int skip_line; | |
250 | { | |
fe6c2db9 NB |
251 | /* We don't skip for an assembler #. */ |
252 | if (skip_line) | |
67821e3a NB |
253 | { |
254 | skip_rest_of_line (pfile); | |
bdcbe496 NB |
255 | if (!pfile->keep_tokens) |
256 | { | |
257 | pfile->cur_run = &pfile->base_run; | |
258 | pfile->cur_token = pfile->base_run.base; | |
259 | } | |
67821e3a | 260 | } |
fe6c2db9 NB |
261 | |
262 | /* Restore state. */ | |
fe6c2db9 NB |
263 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
264 | pfile->state.in_directive = 0; | |
265 | pfile->state.angled_headers = 0; | |
266 | pfile->directive = 0; | |
267 | } | |
268 | ||
18a9d8ff NB |
269 | /* Output diagnostics for a directive DIR. INDENTED is non-zero if |
270 | the '#' was indented. */ | |
18a9d8ff NB |
271 | static void |
272 | directive_diagnostics (pfile, dir, indented) | |
273 | cpp_reader *pfile; | |
274 | const directive *dir; | |
275 | int indented; | |
276 | { | |
dcc229e5 ZW |
277 | /* Issue -pedantic warnings for extensions. */ |
278 | if (CPP_PEDANTIC (pfile) | |
279 | && ! pfile->state.skipping | |
280 | && dir->origin == EXTENSION) | |
281 | cpp_pedwarn (pfile, "#%s is a GCC extension", dir->name); | |
282 | ||
283 | /* Traditionally, a directive is ignored unless its # is in | |
284 | column 1. Therefore in code intended to work with K+R | |
285 | compilers, directives added by C89 must have their # | |
286 | indented, and directives present in traditional C must not. | |
287 | This is true even of directives in skipped conditional | |
288 | blocks. #elif cannot be used at all. */ | |
289 | if (CPP_WTRADITIONAL (pfile)) | |
18a9d8ff | 290 | { |
dcc229e5 ZW |
291 | if (dir == &dtable[T_ELIF]) |
292 | cpp_warning (pfile, "suggest not using #elif in traditional C"); | |
293 | else if (indented && dir->origin == KANDR) | |
294 | cpp_warning (pfile, | |
295 | "traditional C ignores #%s with the # indented", | |
296 | dir->name); | |
297 | else if (!indented && dir->origin != KANDR) | |
298 | cpp_warning (pfile, | |
299 | "suggest hiding #%s from traditional C with an indented #", | |
300 | dir->name); | |
18a9d8ff NB |
301 | } |
302 | } | |
303 | ||
304 | /* Check if we have a known directive. INDENTED is non-zero if the | |
305 | '#' of the directive was indented. This function is in this file | |
306 | to save unnecessarily exporting dtable etc. to cpplex.c. Returns | |
307 | non-zero if the line of tokens has been handled, zero if we should | |
308 | continue processing the line. */ | |
fe6c2db9 NB |
309 | int |
310 | _cpp_handle_directive (pfile, indented) | |
311 | cpp_reader *pfile; | |
312 | int indented; | |
313 | { | |
fe6c2db9 | 314 | const directive *dir = 0; |
345894b4 | 315 | const cpp_token *dname; |
e808ec9c | 316 | bool was_parsing_args = pfile->state.parsing_args; |
fe6c2db9 NB |
317 | int skip = 1; |
318 | ||
e808ec9c NB |
319 | if (was_parsing_args) |
320 | { | |
321 | if (CPP_OPTION (pfile, pedantic)) | |
322 | cpp_pedwarn (pfile, | |
323 | "embedding a directive within macro arguments is not portable"); | |
324 | pfile->state.parsing_args = 0; | |
325 | pfile->state.prevent_expansion = 0; | |
326 | } | |
fe6c2db9 | 327 | start_directive (pfile); |
345894b4 | 328 | dname = _cpp_lex_token (pfile); |
0d9f234d | 329 | |
345894b4 | 330 | if (dname->type == CPP_NAME) |
0d9f234d | 331 | { |
345894b4 NB |
332 | if (dname->val.node->directive_index) |
333 | dir = &dtable[dname->val.node->directive_index - 1]; | |
0d9f234d | 334 | } |
18a9d8ff NB |
335 | /* We do not recognise the # followed by a number extension in |
336 | assembler code. */ | |
345894b4 | 337 | else if (dname->type == CPP_NUMBER && CPP_OPTION (pfile, lang) != CLK_ASM) |
0d9f234d | 338 | { |
dcc229e5 ZW |
339 | dir = &linemarker_dir; |
340 | if (CPP_PEDANTIC (pfile) && ! CPP_OPTION (pfile, preprocessed) | |
341 | && ! pfile->state.skipping) | |
342 | cpp_pedwarn (pfile, "style of line directive is a GCC extension"); | |
93c80368 | 343 | } |
0d9f234d | 344 | |
93c80368 NB |
345 | if (dir) |
346 | { | |
18a9d8ff NB |
347 | /* If we have a directive that is not an opening conditional, |
348 | invalidate any control macro. */ | |
349 | if (! (dir->flags & IF_COND)) | |
350 | pfile->mi_valid = false; | |
351 | ||
352 | /* Kluge alert. In order to be sure that code like this | |
353 | ||
354 | #define HASH # | |
355 | HASH define foo bar | |
356 | ||
357 | does not cause '#define foo bar' to get executed when | |
358 | compiled with -save-temps, we recognize directives in | |
359 | -fpreprocessed mode only if the # is in column 1. cppmacro.c | |
a1f300c0 | 360 | puts a space in front of any '#' at the start of a macro. */ |
18a9d8ff NB |
361 | if (CPP_OPTION (pfile, preprocessed) |
362 | && (indented || !(dir->flags & IN_I))) | |
6d4587f7 | 363 | { |
18a9d8ff NB |
364 | skip = 0; |
365 | dir = 0; | |
6d4587f7 ZW |
366 | } |
367 | else | |
93c80368 | 368 | { |
18a9d8ff NB |
369 | /* In failed conditional groups, all non-conditional |
370 | directives are ignored. Before doing that, whether | |
371 | skipping or not, we should lex angle-bracketed headers | |
372 | correctly, and maybe output some diagnostics. */ | |
373 | pfile->state.angled_headers = dir->flags & INCL; | |
374 | if (! CPP_OPTION (pfile, preprocessed)) | |
375 | directive_diagnostics (pfile, dir, indented); | |
376 | if (pfile->state.skipping && !(dir->flags & COND)) | |
377 | dir = 0; | |
93c80368 NB |
378 | } |
379 | } | |
345894b4 | 380 | else if (dname->type == CPP_EOF) |
18a9d8ff NB |
381 | ; /* CPP_EOF is the "null directive". */ |
382 | else | |
93c80368 NB |
383 | { |
384 | /* An unknown directive. Don't complain about it in assembly | |
385 | source: we don't know where the comments are, and # may | |
386 | introduce assembler pseudo-ops. Don't complain about invalid | |
387 | directives in skipped conditional groups (6.10 p4). */ | |
bdb05a7b | 388 | if (CPP_OPTION (pfile, lang) == CLK_ASM) |
18a9d8ff NB |
389 | skip = 0; |
390 | else if (!pfile->state.skipping) | |
93c80368 | 391 | cpp_error (pfile, "invalid preprocessing directive #%s", |
345894b4 | 392 | cpp_token_as_text (pfile, dname)); |
0d9f234d NB |
393 | } |
394 | ||
18a9d8ff NB |
395 | if (dir) |
396 | { | |
397 | pfile->directive = dir; | |
398 | (*pfile->directive->handler) (pfile); | |
399 | } | |
400 | else if (skip == 0) | |
401 | _cpp_backup_tokens (pfile, 1); | |
402 | ||
403 | end_directive (pfile, skip); | |
e808ec9c NB |
404 | if (was_parsing_args) |
405 | { | |
406 | /* Restore state when within macro args. */ | |
407 | pfile->state.parsing_args = 2; | |
408 | pfile->state.prevent_expansion = 1; | |
409 | pfile->buffer->saved_flags |= PREV_WHITE; | |
410 | } | |
fe6c2db9 | 411 | return skip; |
041c3194 | 412 | } |
7f2935c7 | 413 | |
93c80368 NB |
414 | /* Directive handler wrapper used by the command line option |
415 | processor. */ | |
416 | static void | |
29401c30 | 417 | run_directive (pfile, dir_no, buf, count) |
7f2935c7 | 418 | cpp_reader *pfile; |
93c80368 NB |
419 | int dir_no; |
420 | const char *buf; | |
421 | size_t count; | |
3fdc651f | 422 | { |
29401c30 NB |
423 | cpp_push_buffer (pfile, (const U_CHAR *) buf, count, |
424 | /* from_stage3 */ true, 1); | |
0bda4760 | 425 | start_directive (pfile); |
18a9d8ff NB |
426 | /* We don't want a leading # to be interpreted as a directive. */ |
427 | pfile->buffer->saved_flags = 0; | |
f71aebba NB |
428 | pfile->directive = &dtable[dir_no]; |
429 | (void) (*pfile->directive->handler) (pfile); | |
0bda4760 | 430 | end_directive (pfile, 1); |
ef6e958a | 431 | _cpp_pop_buffer (pfile); |
93c80368 NB |
432 | } |
433 | ||
434 | /* Checks for validity the macro name in #define, #undef, #ifdef and | |
435 | #ifndef directives. */ | |
041c3194 | 436 | static cpp_hashnode * |
93c80368 | 437 | lex_macro_node (pfile) |
041c3194 ZW |
438 | cpp_reader *pfile; |
439 | { | |
b8363a24 | 440 | cpp_hashnode *node; |
345894b4 | 441 | const cpp_token *token = _cpp_lex_token (pfile); |
ea4a453b | 442 | |
92936ecf | 443 | /* The token immediately after #define must be an identifier. That |
b8363a24 ZW |
444 | identifier may not be "defined", per C99 6.10.8p4. |
445 | In C++, it may not be any of the "named operators" either, | |
446 | per C++98 [lex.digraph], [lex.key]. | |
447 | Finally, the identifier may not have been poisoned. (In that case | |
448 | the lexer has issued the error message for us.) */ | |
92936ecf | 449 | |
345894b4 | 450 | if (token->type != CPP_NAME) |
7f2935c7 | 451 | { |
345894b4 | 452 | if (token->type == CPP_EOF) |
93c80368 NB |
453 | cpp_error (pfile, "no macro name given in #%s directive", |
454 | pfile->directive->name); | |
345894b4 | 455 | else if (token->flags & NAMED_OP) |
93c80368 | 456 | cpp_error (pfile, |
b8363a24 | 457 | "\"%s\" cannot be used as a macro name as it is an operator in C++", |
345894b4 | 458 | NODE_NAME (token->val.node)); |
92936ecf | 459 | else |
93c80368 | 460 | cpp_error (pfile, "macro names must be identifiers"); |
b8363a24 ZW |
461 | |
462 | return 0; | |
ba89d661 | 463 | } |
b8363a24 | 464 | |
345894b4 | 465 | node = token->val.node; |
b8363a24 ZW |
466 | if (node->flags & NODE_POISONED) |
467 | return 0; | |
468 | ||
469 | if (node == pfile->spec_nodes.n_defined) | |
07aa0b04 | 470 | { |
b8363a24 ZW |
471 | cpp_error (pfile, "\"%s\" cannot be used as a macro name", |
472 | NODE_NAME (node)); | |
473 | return 0; | |
07aa0b04 ZW |
474 | } |
475 | ||
b8363a24 | 476 | return node; |
7f2935c7 | 477 | } |
7f2935c7 | 478 | |
93c80368 | 479 | /* Process a #define directive. Most work is done in cppmacro.c. */ |
711b8824 | 480 | static void |
168d3732 | 481 | do_define (pfile) |
7f2935c7 | 482 | cpp_reader *pfile; |
7f2935c7 | 483 | { |
93c80368 | 484 | cpp_hashnode *node = lex_macro_node (pfile); |
ff2b53ef | 485 | |
93c80368 NB |
486 | if (node) |
487 | { | |
93c80368 NB |
488 | if (_cpp_create_definition (pfile, node)) |
489 | if (pfile->cb.define) | |
8bbbef34 | 490 | (*pfile->cb.define) (pfile, pfile->directive_line, node); |
93c80368 | 491 | } |
041c3194 ZW |
492 | } |
493 | ||
5d8ebbd8 | 494 | /* Handle #undef. Mark the identifier NT_VOID in the hash table. */ |
711b8824 | 495 | static void |
041c3194 ZW |
496 | do_undef (pfile) |
497 | cpp_reader *pfile; | |
498 | { | |
93c80368 | 499 | cpp_hashnode *node = lex_macro_node (pfile); |
9e62c811 | 500 | |
041c3194 ZW |
501 | /* 6.10.3.5 paragraph 2: [#undef] is ignored if the specified identifier |
502 | is not currently defined as a macro name. */ | |
93c80368 | 503 | if (node && node->type == NT_MACRO) |
9e62c811 | 504 | { |
58fea6af | 505 | if (pfile->cb.undef) |
8bbbef34 | 506 | (*pfile->cb.undef) (pfile, pfile->directive_line, node); |
9e62c811 | 507 | |
618cdda7 | 508 | if (node->flags & NODE_WARN) |
a28c5035 | 509 | cpp_warning (pfile, "undefining \"%s\"", NODE_NAME (node)); |
9e62c811 | 510 | |
041c3194 | 511 | _cpp_free_definition (node); |
9e62c811 | 512 | } |
93c80368 | 513 | check_eol (pfile); |
7f2935c7 PB |
514 | } |
515 | ||
93c80368 NB |
516 | /* Helper routine used by parse_include. Reinterpret the current line |
517 | as an h-char-sequence (< ... >); we are looking at the first token | |
4ed5bcfb NB |
518 | after the <. Returns the header as a token, or NULL on failure. */ |
519 | static const cpp_token * | |
520 | glue_header_name (pfile) | |
93c80368 | 521 | cpp_reader *pfile; |
93c80368 | 522 | { |
4ed5bcfb NB |
523 | cpp_token *header = NULL; |
524 | const cpp_token *token; | |
2450e0b8 NB |
525 | unsigned char *buffer; |
526 | size_t len, total_len = 0, capacity = 1024; | |
93c80368 NB |
527 | |
528 | /* To avoid lexed tokens overwriting our glued name, we can only | |
529 | allocate from the string pool once we've lexed everything. */ | |
2450e0b8 | 530 | buffer = (unsigned char *) xmalloc (capacity); |
93c80368 NB |
531 | for (;;) |
532 | { | |
4ed5bcfb | 533 | token = cpp_get_token (pfile); |
93c80368 | 534 | |
4ed5bcfb | 535 | if (token->type == CPP_GREATER || token->type == CPP_EOF) |
93c80368 NB |
536 | break; |
537 | ||
2450e0b8 NB |
538 | len = cpp_token_len (token); |
539 | if (total_len + len > capacity) | |
93c80368 | 540 | { |
2450e0b8 NB |
541 | capacity = (capacity + len) * 2; |
542 | buffer = (unsigned char *) xrealloc (buffer, capacity); | |
93c80368 NB |
543 | } |
544 | ||
4ed5bcfb | 545 | if (token->flags & PREV_WHITE) |
2450e0b8 | 546 | buffer[total_len++] = ' '; |
93c80368 | 547 | |
2450e0b8 | 548 | total_len = cpp_spell_token (pfile, token, &buffer[total_len]) - buffer; |
93c80368 NB |
549 | } |
550 | ||
4ed5bcfb | 551 | if (token->type == CPP_EOF) |
93c80368 NB |
552 | cpp_error (pfile, "missing terminating > character"); |
553 | else | |
554 | { | |
2450e0b8 NB |
555 | unsigned char *token_mem = _cpp_unaligned_alloc (pfile, total_len + 1); |
556 | memcpy (token_mem, buffer, total_len); | |
557 | token_mem[total_len] = '\0'; | |
558 | ||
4ed5bcfb | 559 | header = _cpp_temp_token (pfile); |
93c80368 | 560 | header->type = CPP_HEADER_NAME; |
ece54d54 | 561 | header->flags = 0; |
2450e0b8 NB |
562 | header->val.str.len = total_len; |
563 | header->val.str.text = token_mem; | |
93c80368 | 564 | } |
041c3194 | 565 | |
2450e0b8 | 566 | free ((PTR) buffer); |
4ed5bcfb | 567 | return header; |
93c80368 | 568 | } |
7f2935c7 | 569 | |
4ed5bcfb NB |
570 | /* Returns the header string of #include, #include_next, #import and |
571 | #pragma dependency. Returns NULL on error. */ | |
572 | static const cpp_token * | |
573 | parse_include (pfile) | |
7f2935c7 PB |
574 | cpp_reader *pfile; |
575 | { | |
93c80368 | 576 | const unsigned char *dir; |
4ed5bcfb | 577 | const cpp_token *header; |
7f2935c7 | 578 | |
09b82253 | 579 | if (pfile->directive == &dtable[T_PRAGMA]) |
93c80368 NB |
580 | dir = U"pragma dependency"; |
581 | else | |
582 | dir = pfile->directive->name; | |
583 | ||
584 | /* Allow macro expansion. */ | |
4ed5bcfb | 585 | header = cpp_get_token (pfile); |
93c80368 | 586 | if (header->type != CPP_STRING && header->type != CPP_HEADER_NAME) |
7f2935c7 | 587 | { |
93c80368 | 588 | if (header->type != CPP_LESS) |
041c3194 ZW |
589 | { |
590 | cpp_error (pfile, "#%s expects \"FILENAME\" or <FILENAME>", dir); | |
4ed5bcfb | 591 | return NULL; |
041c3194 | 592 | } |
4ed5bcfb NB |
593 | |
594 | header = glue_header_name (pfile); | |
595 | if (header == NULL) | |
596 | return header; | |
7f2935c7 | 597 | } |
93c80368 NB |
598 | |
599 | if (header->val.str.len == 0) | |
7f2935c7 | 600 | { |
041c3194 | 601 | cpp_error (pfile, "empty file name in #%s", dir); |
4ed5bcfb | 602 | return NULL; |
7f2935c7 | 603 | } |
7f2935c7 | 604 | |
4ed5bcfb | 605 | return header; |
168d3732 | 606 | } |
3caee4a8 | 607 | |
ba133c96 | 608 | /* Handle #include, #include_next and #import. */ |
711b8824 | 609 | static void |
ba133c96 | 610 | do_include_common (pfile, type) |
168d3732 | 611 | cpp_reader *pfile; |
ba133c96 | 612 | enum include_type type; |
168d3732 | 613 | { |
4ed5bcfb | 614 | const cpp_token *header; |
7f2935c7 | 615 | |
09b82253 NB |
616 | /* For #include_next, if this is the primary source file, warn and |
617 | use the normal search logic. */ | |
618 | if (type == IT_INCLUDE_NEXT && ! pfile->buffer->prev) | |
619 | { | |
620 | cpp_warning (pfile, "#include_next in primary source file"); | |
621 | type = IT_INCLUDE; | |
622 | } | |
623 | else if (type == IT_IMPORT && CPP_OPTION (pfile, warn_import)) | |
624 | { | |
625 | CPP_OPTION (pfile, warn_import) = 0; | |
626 | cpp_warning (pfile, | |
627 | "#import is obsolete, use an #ifndef wrapper in the header file"); | |
628 | } | |
629 | ||
4ed5bcfb NB |
630 | header = parse_include (pfile); |
631 | if (header) | |
ba133c96 NB |
632 | { |
633 | /* Prevent #include recursion. */ | |
d8693c6f | 634 | if (pfile->line_maps.depth >= CPP_STACK_MAX) |
ba133c96 | 635 | cpp_fatal (pfile, "#include nested too deeply"); |
ba133c96 NB |
636 | else |
637 | { | |
09b82253 NB |
638 | check_eol (pfile); |
639 | /* Get out of macro context, if we are. */ | |
bdcbe496 | 640 | skip_rest_of_line (pfile); |
09b82253 | 641 | if (pfile->cb.include) |
8bbbef34 | 642 | (*pfile->cb.include) (pfile, pfile->directive_line, |
4ed5bcfb | 643 | pfile->directive->name, header); |
ba133c96 | 644 | |
4ed5bcfb | 645 | _cpp_execute_include (pfile, header, type); |
ba133c96 NB |
646 | } |
647 | } | |
168d3732 | 648 | } |
e8037d57 | 649 | |
711b8824 | 650 | static void |
ba133c96 | 651 | do_include (pfile) |
168d3732 ZW |
652 | cpp_reader *pfile; |
653 | { | |
ba133c96 NB |
654 | do_include_common (pfile, IT_INCLUDE); |
655 | } | |
168d3732 | 656 | |
ba133c96 NB |
657 | static void |
658 | do_import (pfile) | |
659 | cpp_reader *pfile; | |
660 | { | |
ba133c96 | 661 | do_include_common (pfile, IT_IMPORT); |
168d3732 | 662 | } |
7f2935c7 | 663 | |
711b8824 | 664 | static void |
168d3732 ZW |
665 | do_include_next (pfile) |
666 | cpp_reader *pfile; | |
667 | { | |
ba133c96 | 668 | do_include_common (pfile, IT_INCLUDE_NEXT); |
7f2935c7 | 669 | } |
7f2935c7 | 670 | |
dcc229e5 ZW |
671 | /* Subroutine of do_linemarker. Read possible flags after file name. |
672 | LAST is the last flag seen; 0 if this is the first flag. Return the | |
673 | flag if it is valid, 0 at the end of the directive. Otherwise | |
674 | complain. */ | |
642ce434 | 675 | static unsigned int |
28e0f040 | 676 | read_flag (pfile, last) |
d3a34a0a | 677 | cpp_reader *pfile; |
28e0f040 | 678 | unsigned int last; |
d3a34a0a | 679 | { |
345894b4 | 680 | const cpp_token *token = _cpp_lex_token (pfile); |
d3a34a0a | 681 | |
345894b4 | 682 | if (token->type == CPP_NUMBER && token->val.str.len == 1) |
d3a34a0a | 683 | { |
345894b4 | 684 | unsigned int flag = token->val.str.text[0] - '0'; |
28e0f040 NB |
685 | |
686 | if (flag > last && flag <= 4 | |
687 | && (flag != 4 || last == 3) | |
688 | && (flag != 2 || last == 0)) | |
689 | return flag; | |
d3a34a0a | 690 | } |
93c80368 | 691 | |
345894b4 | 692 | if (token->type != CPP_EOF) |
642ce434 | 693 | cpp_error (pfile, "invalid flag \"%s\" in line directive", |
345894b4 | 694 | cpp_token_as_text (pfile, token)); |
93c80368 | 695 | return 0; |
d3a34a0a JM |
696 | } |
697 | ||
dcc229e5 ZW |
698 | /* Subroutine of do_line and do_linemarker. Returns a version of STR |
699 | which has a NUL terminator and all escape sequences converted to | |
700 | their equivalents. Temporary, hopefully. */ | |
701 | static U_CHAR * | |
702 | dequote_string (pfile, str, len) | |
703 | cpp_reader *pfile; | |
704 | const U_CHAR *str; | |
705 | unsigned int len; | |
706 | { | |
707 | U_CHAR *result = _cpp_unaligned_alloc (pfile, len + 1); | |
708 | U_CHAR *dst = result; | |
709 | const U_CHAR *limit = str + len; | |
710 | unsigned int c; | |
711 | unsigned HOST_WIDE_INT mask; | |
712 | ||
713 | /* We need the mask to match the host's 'unsigned char', not the | |
714 | target's. */ | |
715 | if (CHAR_BIT < HOST_BITS_PER_WIDE_INT) | |
716 | mask = ((unsigned HOST_WIDE_INT) 1 << CHAR_BIT) - 1; | |
717 | else | |
718 | mask = ~(unsigned HOST_WIDE_INT)0; | |
719 | ||
720 | while (str < limit) | |
721 | { | |
722 | c = *str++; | |
723 | if (c != '\\') | |
724 | *dst++ = c; | |
725 | else | |
726 | *dst++ = cpp_parse_escape (pfile, (const U_CHAR **)&str, limit, mask); | |
727 | } | |
728 | *dst++ = '\0'; | |
729 | return result; | |
730 | } | |
731 | ||
732 | /* Subroutine of do_line and do_linemarker. Convert a number in STR, | |
733 | of length LEN, to binary; store it in NUMP, and return 0 if the | |
734 | number was well-formed, 1 if not. Temporary, hopefully. */ | |
041c3194 ZW |
735 | static int |
736 | strtoul_for_line (str, len, nump) | |
737 | const U_CHAR *str; | |
738 | unsigned int len; | |
739 | unsigned long *nump; | |
740 | { | |
741 | unsigned long reg = 0; | |
742 | U_CHAR c; | |
743 | while (len--) | |
744 | { | |
745 | c = *str++; | |
746 | if (!ISDIGIT (c)) | |
747 | return 1; | |
748 | reg *= 10; | |
749 | reg += c - '0'; | |
750 | } | |
751 | *nump = reg; | |
752 | return 0; | |
753 | } | |
754 | ||
6de1e2a9 | 755 | /* Interpret #line command. |
dcc229e5 ZW |
756 | Note that the filename string (if any) is a true string constant |
757 | (escapes are interpreted), unlike in #line. */ | |
711b8824 | 758 | static void |
168d3732 | 759 | do_line (pfile) |
7f2935c7 | 760 | cpp_reader *pfile; |
7f2935c7 | 761 | { |
4ed5bcfb | 762 | const cpp_token *token; |
bb74c963 NB |
763 | const char *new_file = pfile->map->to_file; |
764 | unsigned long new_lineno; | |
93c80368 | 765 | |
27e2564a | 766 | /* C99 raised the minimum limit on #line numbers. */ |
dcc229e5 | 767 | unsigned int cap = CPP_OPTION (pfile, c99) ? 2147483647 : 32767; |
18a9d8ff | 768 | |
93c80368 | 769 | /* #line commands expand macros. */ |
4ed5bcfb NB |
770 | token = cpp_get_token (pfile); |
771 | if (token->type != CPP_NUMBER | |
772 | || strtoul_for_line (token->val.str.text, token->val.str.len, | |
773 | &new_lineno)) | |
7f2935c7 | 774 | { |
93c80368 | 775 | cpp_error (pfile, "\"%s\" after #line is not a positive integer", |
4ed5bcfb | 776 | cpp_token_as_text (pfile, token)); |
9ec7291f | 777 | return; |
6de1e2a9 | 778 | } |
7f2935c7 | 779 | |
dcc229e5 | 780 | if (CPP_PEDANTIC (pfile) && (new_lineno == 0 || new_lineno > cap)) |
041c3194 | 781 | cpp_pedwarn (pfile, "line number out of range"); |
7f2935c7 | 782 | |
4ed5bcfb NB |
783 | token = cpp_get_token (pfile); |
784 | if (token->type == CPP_STRING) | |
5538ada6 | 785 | { |
dcc229e5 ZW |
786 | new_file = (const char *) dequote_string (pfile, token->val.str.text, |
787 | token->val.str.len); | |
788 | check_eol (pfile); | |
789 | } | |
790 | else if (token->type != CPP_EOF) | |
791 | { | |
792 | cpp_error (pfile, "\"%s\" is not a valid filename", | |
793 | cpp_token_as_text (pfile, token)); | |
794 | return; | |
795 | } | |
796 | ||
797 | skip_rest_of_line (pfile); | |
798 | _cpp_do_file_change (pfile, LC_RENAME, new_file, new_lineno, | |
799 | pfile->map->sysp); | |
800 | } | |
801 | ||
802 | /* Interpret the # 44 "file" [flags] notation, which has slightly | |
803 | different syntax and semantics from #line: Flags are allowed, | |
804 | and we never complain about the line number being too big. */ | |
805 | static void | |
806 | do_linemarker (pfile) | |
807 | cpp_reader *pfile; | |
808 | { | |
809 | const cpp_token *token; | |
810 | const char *new_file = pfile->map->to_file; | |
811 | unsigned long new_lineno; | |
812 | unsigned int new_sysp = pfile->map->sysp; | |
813 | enum lc_reason reason = LC_RENAME; | |
814 | int flag; | |
815 | ||
816 | /* Back up so we can get the number again. Putting this in | |
817 | _cpp_handle_directive risks two calls to _cpp_backup_tokens in | |
818 | some circumstances, which can segfault. */ | |
819 | _cpp_backup_tokens (pfile, 1); | |
820 | ||
821 | /* #line commands expand macros. */ | |
822 | token = cpp_get_token (pfile); | |
823 | if (token->type != CPP_NUMBER | |
824 | || strtoul_for_line (token->val.str.text, token->val.str.len, | |
825 | &new_lineno)) | |
826 | { | |
827 | cpp_error (pfile, "\"%s\" after # is not a positive integer", | |
828 | cpp_token_as_text (pfile, token)); | |
829 | return; | |
830 | } | |
941e09b6 | 831 | |
dcc229e5 ZW |
832 | token = cpp_get_token (pfile); |
833 | if (token->type == CPP_STRING) | |
834 | { | |
835 | new_file = (const char *) dequote_string (pfile, token->val.str.text, | |
836 | token->val.str.len); | |
837 | new_sysp = 0; | |
838 | flag = read_flag (pfile, 0); | |
839 | if (flag == 1) | |
840 | { | |
841 | reason = LC_ENTER; | |
842 | /* Fake an include for cpp_included (). */ | |
843 | _cpp_fake_include (pfile, new_file); | |
844 | flag = read_flag (pfile, flag); | |
845 | } | |
846 | else if (flag == 2) | |
847 | { | |
848 | reason = LC_LEAVE; | |
849 | flag = read_flag (pfile, flag); | |
850 | } | |
851 | if (flag == 3) | |
93c80368 | 852 | { |
dcc229e5 ZW |
853 | new_sysp = 1; |
854 | flag = read_flag (pfile, flag); | |
855 | if (flag == 4) | |
856 | new_sysp = 2; | |
93c80368 | 857 | } |
dcc229e5 | 858 | |
fde84349 | 859 | check_eol (pfile); |
041c3194 | 860 | } |
4ed5bcfb | 861 | else if (token->type != CPP_EOF) |
27e2564a NB |
862 | { |
863 | cpp_error (pfile, "\"%s\" is not a valid filename", | |
4ed5bcfb | 864 | cpp_token_as_text (pfile, token)); |
27e2564a NB |
865 | return; |
866 | } | |
7f2935c7 | 867 | |
bdcbe496 | 868 | skip_rest_of_line (pfile); |
bb74c963 | 869 | _cpp_do_file_change (pfile, reason, new_file, new_lineno, new_sysp); |
27e2564a NB |
870 | } |
871 | ||
67821e3a | 872 | /* Arrange the file_change callback. pfile->line has changed to |
47d89cf3 | 873 | FILE_LINE of TO_FILE, for reason REASON. SYSP is 1 for a system |
a1f300c0 | 874 | header, 2 for a system header that needs to be extern "C" protected, |
47d89cf3 | 875 | and zero otherwise. */ |
eb1f4d9d | 876 | void |
47d89cf3 | 877 | _cpp_do_file_change (pfile, reason, to_file, file_line, sysp) |
27e2564a | 878 | cpp_reader *pfile; |
d82fc108 | 879 | enum lc_reason reason; |
47d89cf3 | 880 | const char *to_file; |
67821e3a | 881 | unsigned int file_line; |
47d89cf3 | 882 | unsigned int sysp; |
27e2564a | 883 | { |
47d89cf3 NB |
884 | pfile->map = add_line_map (&pfile->line_maps, reason, sysp, |
885 | pfile->line, to_file, file_line); | |
d82fc108 | 886 | |
eb1f4d9d | 887 | if (pfile->cb.file_change) |
47d89cf3 | 888 | (*pfile->cb.file_change) (pfile, pfile->map); |
7f2935c7 | 889 | } |
941e09b6 | 890 | |
5d8ebbd8 NB |
891 | /* Report a warning or error detected by the program we are |
892 | processing. Use the directive's tokens in the error message. */ | |
711b8824 | 893 | static void |
29b10746 | 894 | do_diagnostic (pfile, code, print_dir) |
7f2935c7 | 895 | cpp_reader *pfile; |
838f313b | 896 | enum error_type code; |
29b10746 | 897 | int print_dir; |
7f2935c7 | 898 | { |
97293897 | 899 | if (_cpp_begin_message (pfile, code, 0, 0)) |
58fea6af | 900 | { |
29b10746 NB |
901 | if (print_dir) |
902 | fprintf (stderr, "#%s ", pfile->directive->name); | |
93c80368 NB |
903 | pfile->state.prevent_expansion++; |
904 | cpp_output_line (pfile, stderr); | |
905 | pfile->state.prevent_expansion--; | |
58fea6af | 906 | } |
7f2935c7 PB |
907 | } |
908 | ||
838f313b NB |
909 | static void |
910 | do_error (pfile) | |
911 | cpp_reader *pfile; | |
912 | { | |
29b10746 | 913 | do_diagnostic (pfile, ERROR, 1); |
838f313b | 914 | } |
7f2935c7 | 915 | |
711b8824 | 916 | static void |
168d3732 | 917 | do_warning (pfile) |
7f2935c7 | 918 | cpp_reader *pfile; |
7f2935c7 | 919 | { |
2f878973 NB |
920 | /* We want #warning diagnostics to be emitted in system headers too. */ |
921 | do_diagnostic (pfile, WARNING_SYSHDR, 1); | |
7f2935c7 PB |
922 | } |
923 | ||
a2a76ce7 | 924 | /* Report program identification. */ |
711b8824 | 925 | static void |
168d3732 | 926 | do_ident (pfile) |
7f2935c7 | 927 | cpp_reader *pfile; |
7f2935c7 | 928 | { |
4ed5bcfb | 929 | const cpp_token *str = cpp_get_token (pfile); |
58fea6af | 930 | |
4ed5bcfb NB |
931 | if (str->type != CPP_STRING) |
932 | cpp_error (pfile, "invalid #ident directive"); | |
93c80368 | 933 | else if (pfile->cb.ident) |
4ed5bcfb | 934 | (*pfile->cb.ident) (pfile, pfile->directive_line, &str->val.str); |
a2a76ce7 | 935 | |
93c80368 | 936 | check_eol (pfile); |
7f2935c7 PB |
937 | } |
938 | ||
a5da89c6 NB |
939 | /* Lookup a PRAGMA name in a singly-linked CHAIN. Returns the |
940 | matching entry, or NULL if none is found. The returned entry could | |
941 | be the start of a namespace chain, or a pragma. */ | |
942 | static struct pragma_entry * | |
943 | lookup_pragma_entry (chain, pragma) | |
944 | struct pragma_entry *chain; | |
4b115ff0 | 945 | const cpp_hashnode *pragma; |
82443371 | 946 | { |
4b115ff0 NB |
947 | while (chain && chain->pragma != pragma) |
948 | chain = chain->next; | |
a5da89c6 NB |
949 | |
950 | return chain; | |
951 | } | |
952 | ||
953 | /* Create and insert a pragma entry for NAME at the beginning of a | |
954 | singly-linked CHAIN. If handler is NULL, it is a namespace, | |
955 | otherwise it is a pragma and its handler. */ | |
956 | static struct pragma_entry * | |
4b115ff0 | 957 | insert_pragma_entry (pfile, chain, pragma, handler) |
58fea6af | 958 | cpp_reader *pfile; |
a5da89c6 | 959 | struct pragma_entry **chain; |
4b115ff0 | 960 | const cpp_hashnode *pragma; |
d82fc108 | 961 | pragma_cb handler; |
82443371 | 962 | { |
a5da89c6 | 963 | struct pragma_entry *new; |
58fea6af | 964 | |
bef985f3 | 965 | new = (struct pragma_entry *) |
8c3b2693 | 966 | _cpp_aligned_alloc (pfile, sizeof (struct pragma_entry)); |
4b115ff0 | 967 | new->pragma = pragma; |
a5da89c6 NB |
968 | if (handler) |
969 | { | |
970 | new->is_nspace = 0; | |
971 | new->u.handler = handler; | |
972 | } | |
973 | else | |
974 | { | |
975 | new->is_nspace = 1; | |
976 | new->u.space = NULL; | |
977 | } | |
58fea6af | 978 | |
a5da89c6 NB |
979 | new->next = *chain; |
980 | *chain = new; | |
981 | return new; | |
58fea6af | 982 | } |
82443371 | 983 | |
a5da89c6 NB |
984 | /* Register a pragma NAME in namespace SPACE. If SPACE is null, it |
985 | goes in the global namespace. HANDLER is the handler it will call, | |
986 | which must be non-NULL. */ | |
58fea6af | 987 | void |
a5da89c6 | 988 | cpp_register_pragma (pfile, space, name, handler) |
82443371 | 989 | cpp_reader *pfile; |
58fea6af | 990 | const char *space; |
a5da89c6 NB |
991 | const char *name; |
992 | pragma_cb handler; | |
82443371 | 993 | { |
a5da89c6 NB |
994 | struct pragma_entry **chain = &pfile->pragmas; |
995 | struct pragma_entry *entry; | |
4b115ff0 | 996 | const cpp_hashnode *node; |
a5da89c6 NB |
997 | |
998 | if (!handler) | |
999 | abort (); | |
58fea6af | 1000 | |
a5da89c6 | 1001 | if (space) |
58fea6af | 1002 | { |
4b115ff0 NB |
1003 | node = cpp_lookup (pfile, U space, strlen (space)); |
1004 | entry = lookup_pragma_entry (*chain, node); | |
a5da89c6 | 1005 | if (!entry) |
4b115ff0 | 1006 | entry = insert_pragma_entry (pfile, chain, node, NULL); |
a5da89c6 NB |
1007 | else if (!entry->is_nspace) |
1008 | goto clash; | |
1009 | chain = &entry->u.space; | |
58fea6af ZW |
1010 | } |
1011 | ||
a5da89c6 | 1012 | /* Check for duplicates. */ |
4b115ff0 NB |
1013 | node = cpp_lookup (pfile, U name, strlen (name)); |
1014 | entry = lookup_pragma_entry (*chain, node); | |
a5da89c6 NB |
1015 | if (entry) |
1016 | { | |
1017 | if (entry->is_nspace) | |
1018 | clash: | |
1019 | cpp_ice (pfile, | |
1020 | "registering \"%s\" as both a pragma and a pragma namespace", | |
4b115ff0 | 1021 | NODE_NAME (node)); |
a5da89c6 NB |
1022 | else if (space) |
1023 | cpp_ice (pfile, "#pragma %s %s is already registered", space, name); | |
1024 | else | |
1025 | cpp_ice (pfile, "#pragma %s is already registered", name); | |
1026 | } | |
1027 | else | |
4b115ff0 | 1028 | insert_pragma_entry (pfile, chain, node, handler); |
58fea6af | 1029 | } |
a5da89c6 NB |
1030 | |
1031 | /* Register the pragmas the preprocessor itself handles. */ | |
58fea6af ZW |
1032 | void |
1033 | _cpp_init_internal_pragmas (pfile) | |
1034 | cpp_reader *pfile; | |
1035 | { | |
a5da89c6 | 1036 | /* Pragmas in the global namespace. */ |
58fea6af ZW |
1037 | cpp_register_pragma (pfile, 0, "poison", do_pragma_poison); |
1038 | cpp_register_pragma (pfile, 0, "once", do_pragma_once); | |
1039 | ||
a5da89c6 | 1040 | /* New GCC-specific pragmas should be put in the GCC namespace. */ |
58fea6af ZW |
1041 | cpp_register_pragma (pfile, "GCC", "poison", do_pragma_poison); |
1042 | cpp_register_pragma (pfile, "GCC", "system_header", do_pragma_system_header); | |
1043 | cpp_register_pragma (pfile, "GCC", "dependency", do_pragma_dependency); | |
82443371 | 1044 | } |
7f2935c7 | 1045 | |
a5da89c6 NB |
1046 | /* Pragmata handling. We handle some, and pass the rest on to the |
1047 | front end. C99 defines three pragmas and says that no macro | |
1048 | expansion is to be performed on them; whether or not macro | |
1049 | expansion happens for other pragmas is implementation defined. | |
1050 | This implementation never macro-expands the text after #pragma. */ | |
711b8824 | 1051 | static void |
168d3732 | 1052 | do_pragma (pfile) |
7f2935c7 | 1053 | cpp_reader *pfile; |
7f2935c7 | 1054 | { |
a5da89c6 | 1055 | const struct pragma_entry *p = NULL; |
4ed5bcfb | 1056 | const cpp_token *token; |
a5da89c6 | 1057 | unsigned int count = 1; |
add7091b | 1058 | |
93c80368 | 1059 | pfile->state.prevent_expansion++; |
58fea6af | 1060 | |
4ed5bcfb NB |
1061 | token = cpp_get_token (pfile); |
1062 | if (token->type == CPP_NAME) | |
0172e2bc | 1063 | { |
4b115ff0 | 1064 | p = lookup_pragma_entry (pfile->pragmas, token->val.node); |
a5da89c6 | 1065 | if (p && p->is_nspace) |
58fea6af | 1066 | { |
a5da89c6 NB |
1067 | count = 2; |
1068 | token = cpp_get_token (pfile); | |
1069 | if (token->type == CPP_NAME) | |
4b115ff0 | 1070 | p = lookup_pragma_entry (p->u.space, token->val.node); |
a5da89c6 NB |
1071 | else |
1072 | p = NULL; | |
58fea6af | 1073 | } |
58fea6af | 1074 | } |
041c3194 | 1075 | |
97293897 NB |
1076 | /* FIXME. This is an awful kludge to get the front ends to update |
1077 | their notion of line number for diagnostic purposes. The line | |
1078 | number should be passed to the handler and they should do it | |
1079 | themselves. Stand-alone CPP must ignore us, otherwise it will | |
1080 | prefix the directive with spaces, hence the 1. Ugh. */ | |
1081 | if (pfile->cb.line_change) | |
4ed5bcfb | 1082 | (*pfile->cb.line_change)(pfile, token, 1); |
97293897 | 1083 | |
a5da89c6 NB |
1084 | if (p) |
1085 | (*p->u.handler) (pfile); | |
d82fc108 | 1086 | else if (pfile->cb.def_pragma) |
bdcbe496 NB |
1087 | { |
1088 | _cpp_backup_tokens (pfile, count); | |
1089 | (*pfile->cb.def_pragma) (pfile, pfile->directive_line); | |
1090 | } | |
a5da89c6 | 1091 | |
97293897 | 1092 | pfile->state.prevent_expansion--; |
82443371 NS |
1093 | } |
1094 | ||
5d8ebbd8 | 1095 | /* Handle #pragma once. */ |
58fea6af | 1096 | static void |
a2a76ce7 ZW |
1097 | do_pragma_once (pfile) |
1098 | cpp_reader *pfile; | |
1099 | { | |
317639a8 BC |
1100 | cpp_warning (pfile, "#pragma once is obsolete"); |
1101 | ||
642ce434 | 1102 | if (pfile->buffer->prev == NULL) |
93c80368 | 1103 | cpp_warning (pfile, "#pragma once in main file"); |
a2a76ce7 | 1104 | else |
642ce434 | 1105 | _cpp_never_reread (pfile->buffer->inc); |
93c80368 NB |
1106 | |
1107 | check_eol (pfile); | |
a2a76ce7 | 1108 | } |
fc009f96 | 1109 | |
5d8ebbd8 NB |
1110 | /* Handle #pragma poison, to poison one or more identifiers so that |
1111 | the lexer produces a hard error for each subsequent usage. */ | |
58fea6af | 1112 | static void |
a2a76ce7 ZW |
1113 | do_pragma_poison (pfile) |
1114 | cpp_reader *pfile; | |
1115 | { | |
345894b4 | 1116 | const cpp_token *tok; |
f8f769ea | 1117 | cpp_hashnode *hp; |
a2a76ce7 | 1118 | |
93c80368 | 1119 | pfile->state.poisoned_ok = 1; |
a2a76ce7 ZW |
1120 | for (;;) |
1121 | { | |
345894b4 NB |
1122 | tok = _cpp_lex_token (pfile); |
1123 | if (tok->type == CPP_EOF) | |
a2a76ce7 | 1124 | break; |
345894b4 | 1125 | if (tok->type != CPP_NAME) |
fc009f96 | 1126 | { |
93c80368 NB |
1127 | cpp_error (pfile, "invalid #pragma GCC poison directive"); |
1128 | break; | |
fc009f96 GK |
1129 | } |
1130 | ||
345894b4 | 1131 | hp = tok->val.node; |
93c80368 NB |
1132 | if (hp->flags & NODE_POISONED) |
1133 | continue; | |
1134 | ||
1135 | if (hp->type == NT_MACRO) | |
a28c5035 | 1136 | cpp_warning (pfile, "poisoning existing macro \"%s\"", NODE_NAME (hp)); |
93c80368 NB |
1137 | _cpp_free_definition (hp); |
1138 | hp->flags |= NODE_POISONED | NODE_DIAGNOSTIC; | |
fc009f96 | 1139 | } |
93c80368 | 1140 | pfile->state.poisoned_ok = 0; |
7f2935c7 | 1141 | } |
2c0b35cb ZW |
1142 | |
1143 | /* Mark the current header as a system header. This will suppress | |
1144 | some categories of warnings (notably those from -pedantic). It is | |
1145 | intended for use in system libraries that cannot be implemented in | |
1146 | conforming C, but cannot be certain that their headers appear in a | |
1147 | system include directory. To prevent abuse, it is rejected in the | |
1148 | primary source file. */ | |
58fea6af | 1149 | static void |
2c0b35cb ZW |
1150 | do_pragma_system_header (pfile) |
1151 | cpp_reader *pfile; | |
1152 | { | |
614c7d37 NB |
1153 | cpp_buffer *buffer = pfile->buffer; |
1154 | ||
1155 | if (buffer->prev == 0) | |
1156 | cpp_warning (pfile, "#pragma system_header ignored outside include file"); | |
2c0b35cb | 1157 | else |
d82fc108 NB |
1158 | { |
1159 | check_eol (pfile); | |
bdcbe496 | 1160 | skip_rest_of_line (pfile); |
d82fc108 NB |
1161 | cpp_make_system_header (pfile, 1, 0); |
1162 | } | |
2c0b35cb | 1163 | } |
f3f751ad NS |
1164 | |
1165 | /* Check the modified date of the current include file against a specified | |
1166 | file. Issue a diagnostic, if the specified file is newer. We use this to | |
1167 | determine if a fixed header should be refixed. */ | |
58fea6af | 1168 | static void |
f3f751ad NS |
1169 | do_pragma_dependency (pfile) |
1170 | cpp_reader *pfile; | |
1171 | { | |
4ed5bcfb | 1172 | const cpp_token *header; |
93c80368 | 1173 | int ordering; |
041c3194 | 1174 | |
4ed5bcfb NB |
1175 | header = parse_include (pfile); |
1176 | if (!header) | |
58fea6af | 1177 | return; |
041c3194 | 1178 | |
4ed5bcfb | 1179 | ordering = _cpp_compare_file_date (pfile, header); |
f3f751ad | 1180 | if (ordering < 0) |
93c80368 | 1181 | cpp_warning (pfile, "cannot find source %s", |
4ed5bcfb | 1182 | cpp_token_as_text (pfile, header)); |
f3f751ad NS |
1183 | else if (ordering > 0) |
1184 | { | |
93c80368 | 1185 | cpp_warning (pfile, "current file is older than %s", |
4ed5bcfb NB |
1186 | cpp_token_as_text (pfile, header)); |
1187 | if (cpp_get_token (pfile)->type != CPP_EOF) | |
bdcbe496 NB |
1188 | { |
1189 | _cpp_backup_tokens (pfile, 1); | |
1190 | do_diagnostic (pfile, WARNING, 0); | |
1191 | } | |
f3f751ad | 1192 | } |
f3f751ad NS |
1193 | } |
1194 | ||
4ed5bcfb NB |
1195 | /* Get a token but skip padding. */ |
1196 | static const cpp_token * | |
1197 | get_token_no_padding (pfile) | |
a5c3cccd | 1198 | cpp_reader *pfile; |
a5c3cccd | 1199 | { |
4ed5bcfb NB |
1200 | for (;;) |
1201 | { | |
1202 | const cpp_token *result = cpp_get_token (pfile); | |
1203 | if (result->type != CPP_PADDING) | |
1204 | return result; | |
1205 | } | |
1206 | } | |
a5c3cccd | 1207 | |
4ed5bcfb NB |
1208 | /* Check syntax is "(string-literal)". Returns the string on success, |
1209 | or NULL on failure. */ | |
1210 | static const cpp_token * | |
1211 | get__Pragma_string (pfile) | |
1212 | cpp_reader *pfile; | |
1213 | { | |
1214 | const cpp_token *string; | |
a5c3cccd | 1215 | |
4ed5bcfb NB |
1216 | if (get_token_no_padding (pfile)->type != CPP_OPEN_PAREN) |
1217 | return NULL; | |
1218 | ||
1219 | string = get_token_no_padding (pfile); | |
a5c3cccd | 1220 | if (string->type != CPP_STRING && string->type != CPP_WSTRING) |
4ed5bcfb NB |
1221 | return NULL; |
1222 | ||
1223 | if (get_token_no_padding (pfile)->type != CPP_CLOSE_PAREN) | |
1224 | return NULL; | |
a5c3cccd | 1225 | |
4ed5bcfb | 1226 | return string; |
a5c3cccd NB |
1227 | } |
1228 | ||
87062813 NB |
1229 | /* Destringize IN into a temporary buffer, by removing the first \ of |
1230 | \" and \\ sequences, and process the result as a #pragma directive. */ | |
1231 | static void | |
1232 | destringize_and_run (pfile, in) | |
1233 | cpp_reader *pfile; | |
a5c3cccd | 1234 | const cpp_string *in; |
a5c3cccd NB |
1235 | { |
1236 | const unsigned char *src, *limit; | |
87062813 | 1237 | char *dest, *result; |
a5c3cccd | 1238 | |
4d6baafa | 1239 | dest = result = alloca (in->len + 1); |
a5c3cccd NB |
1240 | for (src = in->text, limit = src + in->len; src < limit;) |
1241 | { | |
1242 | /* We know there is a character following the backslash. */ | |
1243 | if (*src == '\\' && (src[1] == '\\' || src[1] == '"')) | |
1244 | src++; | |
1245 | *dest++ = *src++; | |
1246 | } | |
4d6baafa | 1247 | *dest = '\0'; |
a5c3cccd | 1248 | |
87062813 | 1249 | run_directive (pfile, T_PRAGMA, result, dest - result); |
a5c3cccd NB |
1250 | } |
1251 | ||
87062813 | 1252 | /* Handle the _Pragma operator. */ |
a5c3cccd NB |
1253 | void |
1254 | _cpp_do__Pragma (pfile) | |
1255 | cpp_reader *pfile; | |
1256 | { | |
4ed5bcfb | 1257 | const cpp_token *string = get__Pragma_string (pfile); |
a5c3cccd | 1258 | |
4ed5bcfb | 1259 | if (!string) |
67821e3a NB |
1260 | cpp_error (pfile, "_Pragma takes a parenthesized string literal"); |
1261 | else | |
a5c3cccd | 1262 | { |
50410426 NB |
1263 | /* Ideally, we'd like |
1264 | token1 _Pragma ("foo") token2 | |
1265 | to be output as | |
1266 | token1 | |
1267 | # 7 "file.c" | |
1268 | #pragma foo | |
1269 | # 7 "file.c" | |
1270 | token2 | |
1271 | Getting these correct line markers is a little tricky. */ | |
1272 | ||
1273 | unsigned int orig_line = pfile->line; | |
87062813 | 1274 | destringize_and_run (pfile, &string->val.str); |
50410426 NB |
1275 | pfile->line = orig_line; |
1276 | pfile->buffer->saved_flags = BOL; | |
a5c3cccd | 1277 | } |
a5c3cccd NB |
1278 | } |
1279 | ||
7f2935c7 | 1280 | /* Just ignore #sccs, on systems where we define it at all. */ |
07aa0b04 | 1281 | #ifdef SCCS_DIRECTIVE |
711b8824 | 1282 | static void |
168d3732 | 1283 | do_sccs (pfile) |
041c3194 | 1284 | cpp_reader *pfile ATTRIBUTE_UNUSED; |
7f2935c7 | 1285 | { |
7f2935c7 | 1286 | } |
07aa0b04 | 1287 | #endif |
1d0e51ba | 1288 | |
5d8ebbd8 | 1289 | /* Handle #ifdef. */ |
711b8824 | 1290 | static void |
168d3732 ZW |
1291 | do_ifdef (pfile) |
1292 | cpp_reader *pfile; | |
1293 | { | |
93c80368 | 1294 | int skip = 1; |
041c3194 | 1295 | |
cef0d199 | 1296 | if (! pfile->state.skipping) |
93c80368 NB |
1297 | { |
1298 | const cpp_hashnode *node = lex_macro_node (pfile); | |
041c3194 | 1299 | |
93c80368 NB |
1300 | if (node) |
1301 | skip = node->type != NT_MACRO; | |
b43db0b3 GK |
1302 | |
1303 | if (node) | |
1304 | check_eol (pfile); | |
93c80368 | 1305 | } |
168d3732 | 1306 | |
93c80368 NB |
1307 | push_conditional (pfile, skip, T_IFDEF, 0); |
1308 | } | |
168d3732 | 1309 | |
5d8ebbd8 | 1310 | /* Handle #ifndef. */ |
711b8824 | 1311 | static void |
168d3732 ZW |
1312 | do_ifndef (pfile) |
1313 | cpp_reader *pfile; | |
1314 | { | |
93c80368 | 1315 | int skip = 1; |
bfb9dc7f | 1316 | const cpp_hashnode *node = 0; |
168d3732 | 1317 | |
cef0d199 | 1318 | if (! pfile->state.skipping) |
5af7e2c2 | 1319 | { |
93c80368 NB |
1320 | node = lex_macro_node (pfile); |
1321 | if (node) | |
1322 | skip = node->type == NT_MACRO; | |
b43db0b3 GK |
1323 | |
1324 | if (node) | |
1325 | check_eol (pfile); | |
5af7e2c2 | 1326 | } |
041c3194 | 1327 | |
93c80368 | 1328 | push_conditional (pfile, skip, T_IFNDEF, node); |
7f2935c7 PB |
1329 | } |
1330 | ||
6d18adbc NB |
1331 | /* _cpp_parse_expr puts a macro in a "#if !defined ()" expression in |
1332 | pfile->mi_ind_cmacro so we can handle multiple-include | |
1333 | optimisations. If macro expansion occurs in the expression, we | |
1334 | cannot treat it as a controlling conditional, since the expansion | |
1335 | could change in the future. That is handled by cpp_get_token. */ | |
711b8824 | 1336 | static void |
ea4a453b | 1337 | do_if (pfile) |
7f2935c7 | 1338 | cpp_reader *pfile; |
7f2935c7 | 1339 | { |
93c80368 | 1340 | int skip = 1; |
7f2935c7 | 1341 | |
cef0d199 | 1342 | if (! pfile->state.skipping) |
6d18adbc | 1343 | skip = _cpp_parse_expr (pfile) == 0; |
93c80368 | 1344 | |
6d18adbc | 1345 | push_conditional (pfile, skip, T_IF, pfile->mi_ind_cmacro); |
7f2935c7 PB |
1346 | } |
1347 | ||
b528a07e | 1348 | /* Flip skipping state if appropriate and continue without changing |
ea4a453b ZW |
1349 | if_stack; this is so that the error message for missing #endif's |
1350 | etc. will point to the original #if. */ | |
711b8824 | 1351 | static void |
ea4a453b ZW |
1352 | do_else (pfile) |
1353 | cpp_reader *pfile; | |
ed705a82 | 1354 | { |
b528a07e NB |
1355 | cpp_buffer *buffer = pfile->buffer; |
1356 | struct if_stack *ifs = buffer->if_stack; | |
ff2b53ef | 1357 | |
ea4a453b | 1358 | if (ifs == NULL) |
93c80368 NB |
1359 | cpp_error (pfile, "#else without #if"); |
1360 | else | |
ff2b53ef | 1361 | { |
93c80368 NB |
1362 | if (ifs->type == T_ELSE) |
1363 | { | |
1364 | cpp_error (pfile, "#else after #else"); | |
50410426 | 1365 | cpp_error_with_line (pfile, ifs->line, 0, |
93c80368 NB |
1366 | "the conditional began here"); |
1367 | } | |
b528a07e NB |
1368 | ifs->type = T_ELSE; |
1369 | ||
cef0d199 NB |
1370 | /* Skip any future (erroneous) #elses or #elifs. */ |
1371 | pfile->state.skipping = ifs->skip_elses; | |
1372 | ifs->skip_elses = true; | |
7f2935c7 | 1373 | |
93c80368 NB |
1374 | /* Invalidate any controlling macro. */ |
1375 | ifs->mi_cmacro = 0; | |
93c80368 | 1376 | |
cef0d199 NB |
1377 | /* Only check EOL if was not originally skipping. */ |
1378 | if (!ifs->was_skipping) | |
1379 | check_eol (pfile); | |
1380 | } | |
7f2935c7 PB |
1381 | } |
1382 | ||
5d8ebbd8 | 1383 | /* Handle a #elif directive by not changing if_stack either. See the |
93c80368 | 1384 | comment above do_else. */ |
711b8824 | 1385 | static void |
ea4a453b | 1386 | do_elif (pfile) |
7f2935c7 | 1387 | cpp_reader *pfile; |
7f2935c7 | 1388 | { |
b528a07e NB |
1389 | cpp_buffer *buffer = pfile->buffer; |
1390 | struct if_stack *ifs = buffer->if_stack; | |
7f2935c7 | 1391 | |
ea4a453b | 1392 | if (ifs == NULL) |
b528a07e NB |
1393 | cpp_error (pfile, "#elif without #if"); |
1394 | else | |
40ea76de | 1395 | { |
b528a07e NB |
1396 | if (ifs->type == T_ELSE) |
1397 | { | |
1398 | cpp_error (pfile, "#elif after #else"); | |
50410426 | 1399 | cpp_error_with_line (pfile, ifs->line, 0, |
b528a07e NB |
1400 | "the conditional began here"); |
1401 | } | |
1402 | ifs->type = T_ELIF; | |
93c80368 | 1403 | |
cef0d199 NB |
1404 | /* Only evaluate this if we aren't skipping elses. During |
1405 | evaluation, set skipping to false to get lexer warnings. */ | |
1406 | if (ifs->skip_elses) | |
1407 | pfile->state.skipping = 1; | |
1408 | else | |
b528a07e | 1409 | { |
cef0d199 NB |
1410 | pfile->state.skipping = 0; |
1411 | pfile->state.skipping = ! _cpp_parse_expr (pfile); | |
1412 | ifs->skip_elses = ! pfile->state.skipping; | |
b528a07e | 1413 | } |
cef0d199 NB |
1414 | |
1415 | /* Invalidate any controlling macro. */ | |
1416 | ifs->mi_cmacro = 0; | |
40ea76de | 1417 | } |
7f2935c7 PB |
1418 | } |
1419 | ||
cef0d199 | 1420 | /* #endif pops the if stack and resets pfile->state.skipping. */ |
711b8824 | 1421 | static void |
168d3732 | 1422 | do_endif (pfile) |
7f2935c7 | 1423 | cpp_reader *pfile; |
7f2935c7 | 1424 | { |
b528a07e NB |
1425 | cpp_buffer *buffer = pfile->buffer; |
1426 | struct if_stack *ifs = buffer->if_stack; | |
ea4a453b | 1427 | |
ea4a453b ZW |
1428 | if (ifs == NULL) |
1429 | cpp_error (pfile, "#endif without #if"); | |
7f2935c7 PB |
1430 | else |
1431 | { | |
cef0d199 NB |
1432 | /* Only check EOL if was not originally skipping. */ |
1433 | if (!ifs->was_skipping) | |
1434 | check_eol (pfile); | |
1435 | ||
93c80368 NB |
1436 | /* If potential control macro, we go back outside again. */ |
1437 | if (ifs->next == 0 && ifs->mi_cmacro) | |
1438 | { | |
6d18adbc | 1439 | pfile->mi_valid = true; |
93c80368 NB |
1440 | pfile->mi_cmacro = ifs->mi_cmacro; |
1441 | } | |
1442 | ||
b528a07e | 1443 | buffer->if_stack = ifs->next; |
cef0d199 | 1444 | pfile->state.skipping = ifs->was_skipping; |
2a967f3d | 1445 | obstack_free (&pfile->buffer_ob, ifs); |
7f2935c7 | 1446 | } |
93c80368 | 1447 | } |
041c3194 | 1448 | |
5d8ebbd8 NB |
1449 | /* Push an if_stack entry for a preprocessor conditional, and set |
1450 | pfile->state.skipping to SKIP. If TYPE indicates the conditional | |
1451 | is #if or #ifndef, CMACRO is a potentially controlling macro, and | |
1452 | we need to check here that we are at the top of the file. */ | |
ea4a453b ZW |
1453 | static void |
1454 | push_conditional (pfile, skip, type, cmacro) | |
1455 | cpp_reader *pfile; | |
1456 | int skip; | |
1457 | int type; | |
1458 | const cpp_hashnode *cmacro; | |
1459 | { | |
1460 | struct if_stack *ifs; | |
b528a07e | 1461 | cpp_buffer *buffer = pfile->buffer; |
ea4a453b | 1462 | |
2a967f3d | 1463 | ifs = xobnew (&pfile->buffer_ob, struct if_stack); |
50410426 | 1464 | ifs->line = pfile->directive_line; |
b528a07e | 1465 | ifs->next = buffer->if_stack; |
cef0d199 NB |
1466 | ifs->skip_elses = pfile->state.skipping || !skip; |
1467 | ifs->was_skipping = pfile->state.skipping; | |
ea4a453b | 1468 | ifs->type = type; |
6d18adbc NB |
1469 | /* This condition is effectively a test for top-of-file. */ |
1470 | if (pfile->mi_valid && pfile->mi_cmacro == 0) | |
93c80368 NB |
1471 | ifs->mi_cmacro = cmacro; |
1472 | else | |
1473 | ifs->mi_cmacro = 0; | |
ea4a453b | 1474 | |
cef0d199 | 1475 | pfile->state.skipping = skip; |
b528a07e | 1476 | buffer->if_stack = ifs; |
782331f4 | 1477 | } |
7061aa5a | 1478 | |
5d8ebbd8 NB |
1479 | /* Read the tokens of the answer into the macro pool, in a directive |
1480 | of type TYPE. Only commit the memory if we intend it as permanent | |
1481 | storage, i.e. the #assert case. Returns 0 on success, and sets | |
1482 | ANSWERP to point to the answer. */ | |
93c80368 NB |
1483 | static int |
1484 | parse_answer (pfile, answerp, type) | |
7f2935c7 | 1485 | cpp_reader *pfile; |
041c3194 | 1486 | struct answer **answerp; |
93c80368 | 1487 | int type; |
7f2935c7 | 1488 | { |
4ed5bcfb | 1489 | const cpp_token *paren; |
93c80368 | 1490 | struct answer *answer; |
8c3b2693 | 1491 | unsigned int acount; |
93c80368 NB |
1492 | |
1493 | /* In a conditional, it is legal to not have an open paren. We | |
1494 | should save the following token in this case. */ | |
4ed5bcfb | 1495 | paren = cpp_get_token (pfile); |
93c80368 NB |
1496 | |
1497 | /* If not a paren, see if we're OK. */ | |
4ed5bcfb | 1498 | if (paren->type != CPP_OPEN_PAREN) |
041c3194 | 1499 | { |
93c80368 NB |
1500 | /* In a conditional no answer is a test for any answer. It |
1501 | could be followed by any token. */ | |
1502 | if (type == T_IF) | |
bdcbe496 NB |
1503 | { |
1504 | _cpp_backup_tokens (pfile, 1); | |
1505 | return 0; | |
1506 | } | |
93c80368 NB |
1507 | |
1508 | /* #unassert with no answer is valid - it removes all answers. */ | |
4ed5bcfb | 1509 | if (type == T_UNASSERT && paren->type == CPP_EOF) |
93c80368 | 1510 | return 0; |
15dad1d9 | 1511 | |
041c3194 | 1512 | cpp_error (pfile, "missing '(' after predicate"); |
93c80368 | 1513 | return 1; |
041c3194 | 1514 | } |
7061aa5a | 1515 | |
8c3b2693 | 1516 | for (acount = 0;; acount++) |
041c3194 | 1517 | { |
8c3b2693 NB |
1518 | size_t room_needed; |
1519 | const cpp_token *token = cpp_get_token (pfile); | |
1520 | cpp_token *dest; | |
93c80368 | 1521 | |
041c3194 ZW |
1522 | if (token->type == CPP_CLOSE_PAREN) |
1523 | break; | |
a7abcbbf | 1524 | |
93c80368 | 1525 | if (token->type == CPP_EOF) |
041c3194 | 1526 | { |
93c80368 NB |
1527 | cpp_error (pfile, "missing ')' to complete answer"); |
1528 | return 1; | |
041c3194 | 1529 | } |
8c3b2693 NB |
1530 | |
1531 | /* struct answer includes the space for one token. */ | |
1532 | room_needed = (sizeof (struct answer) + acount * sizeof (cpp_token)); | |
1533 | ||
1534 | if (BUFF_ROOM (pfile->a_buff) < room_needed) | |
1535 | _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (struct answer)); | |
1536 | ||
1537 | dest = &((struct answer *) BUFF_FRONT (pfile->a_buff))->first[acount]; | |
1538 | *dest = *token; | |
1539 | ||
1540 | /* Drop whitespace at start, for answer equivalence purposes. */ | |
1541 | if (acount == 0) | |
1542 | dest->flags &= ~PREV_WHITE; | |
041c3194 | 1543 | } |
15dad1d9 | 1544 | |
8c3b2693 | 1545 | if (acount == 0) |
7061aa5a | 1546 | { |
041c3194 | 1547 | cpp_error (pfile, "predicate's answer is empty"); |
93c80368 | 1548 | return 1; |
7f2935c7 | 1549 | } |
041c3194 | 1550 | |
8c3b2693 NB |
1551 | answer = (struct answer *) BUFF_FRONT (pfile->a_buff); |
1552 | answer->count = acount; | |
1553 | answer->next = NULL; | |
93c80368 | 1554 | *answerp = answer; |
041c3194 | 1555 | |
93c80368 NB |
1556 | return 0; |
1557 | } | |
041c3194 | 1558 | |
5d8ebbd8 NB |
1559 | /* Parses an assertion directive of type TYPE, returning a pointer to |
1560 | the hash node of the predicate, or 0 on error. If an answer was | |
1561 | supplied, it is placed in ANSWERP, otherwise it is set to 0. */ | |
93c80368 NB |
1562 | static cpp_hashnode * |
1563 | parse_assertion (pfile, answerp, type) | |
1564 | cpp_reader *pfile; | |
1565 | struct answer **answerp; | |
1566 | int type; | |
1567 | { | |
1568 | cpp_hashnode *result = 0; | |
4ed5bcfb | 1569 | const cpp_token *predicate; |
93c80368 NB |
1570 | |
1571 | /* We don't expand predicates or answers. */ | |
1572 | pfile->state.prevent_expansion++; | |
1573 | ||
93c80368 | 1574 | *answerp = 0; |
4ed5bcfb NB |
1575 | predicate = cpp_get_token (pfile); |
1576 | if (predicate->type == CPP_EOF) | |
93c80368 | 1577 | cpp_error (pfile, "assertion without predicate"); |
4ed5bcfb | 1578 | else if (predicate->type != CPP_NAME) |
93c80368 NB |
1579 | cpp_error (pfile, "predicate must be an identifier"); |
1580 | else if (parse_answer (pfile, answerp, type) == 0) | |
1581 | { | |
4ed5bcfb | 1582 | unsigned int len = NODE_LEN (predicate->val.node); |
93c80368 | 1583 | unsigned char *sym = alloca (len + 1); |
041c3194 | 1584 | |
93c80368 NB |
1585 | /* Prefix '#' to get it out of macro namespace. */ |
1586 | sym[0] = '#'; | |
4ed5bcfb | 1587 | memcpy (sym + 1, NODE_NAME (predicate->val.node), len); |
93c80368 NB |
1588 | result = cpp_lookup (pfile, sym, len + 1); |
1589 | } | |
7061aa5a | 1590 | |
93c80368 NB |
1591 | pfile->state.prevent_expansion--; |
1592 | return result; | |
7f2935c7 | 1593 | } |
7061aa5a | 1594 | |
5d8ebbd8 | 1595 | /* Returns a pointer to the pointer to CANDIDATE in the answer chain, |
041c3194 | 1596 | or a pointer to NULL if the answer is not in the chain. */ |
93c80368 NB |
1597 | static struct answer ** |
1598 | find_answer (node, candidate) | |
041c3194 | 1599 | cpp_hashnode *node; |
93c80368 | 1600 | const struct answer *candidate; |
7f2935c7 | 1601 | { |
93c80368 | 1602 | unsigned int i; |
041c3194 | 1603 | struct answer **result; |
7f2935c7 | 1604 | |
041c3194 | 1605 | for (result = &node->value.answers; *result; result = &(*result)->next) |
93c80368 NB |
1606 | { |
1607 | struct answer *answer = *result; | |
1608 | ||
1609 | if (answer->count == candidate->count) | |
1610 | { | |
1611 | for (i = 0; i < answer->count; i++) | |
1612 | if (! _cpp_equiv_tokens (&answer->first[i], &candidate->first[i])) | |
1613 | break; | |
1614 | ||
1615 | if (i == answer->count) | |
1616 | break; | |
1617 | } | |
1618 | } | |
ff2b53ef | 1619 | |
041c3194 ZW |
1620 | return result; |
1621 | } | |
15dad1d9 | 1622 | |
93c80368 NB |
1623 | /* Test an assertion within a preprocessor conditional. Returns |
1624 | non-zero on failure, zero on success. On success, the result of | |
1625 | the test is written into VALUE. */ | |
1626 | int | |
1627 | _cpp_test_assertion (pfile, value) | |
1628 | cpp_reader *pfile; | |
1629 | int *value; | |
1630 | { | |
1631 | struct answer *answer; | |
1632 | cpp_hashnode *node; | |
1633 | ||
1634 | node = parse_assertion (pfile, &answer, T_IF); | |
1635 | if (node) | |
1636 | *value = (node->type == NT_ASSERTION && | |
1637 | (answer == 0 || *find_answer (node, answer) != 0)); | |
1638 | ||
1639 | /* We don't commit the memory for the answer - it's temporary only. */ | |
1640 | return node == 0; | |
1641 | } | |
1642 | ||
5d8ebbd8 | 1643 | /* Handle #assert. */ |
711b8824 | 1644 | static void |
041c3194 ZW |
1645 | do_assert (pfile) |
1646 | cpp_reader *pfile; | |
1647 | { | |
1648 | struct answer *new_answer; | |
1649 | cpp_hashnode *node; | |
1650 | ||
93c80368 | 1651 | node = parse_assertion (pfile, &new_answer, T_ASSERT); |
041c3194 | 1652 | if (node) |
ff2b53ef | 1653 | { |
93c80368 NB |
1654 | /* Place the new answer in the answer list. First check there |
1655 | is not a duplicate. */ | |
041c3194 | 1656 | new_answer->next = 0; |
93c80368 | 1657 | if (node->type == NT_ASSERTION) |
041c3194 | 1658 | { |
93c80368 NB |
1659 | if (*find_answer (node, new_answer)) |
1660 | { | |
a28c5035 | 1661 | cpp_warning (pfile, "\"%s\" re-asserted", NODE_NAME (node) + 1); |
93c80368 NB |
1662 | return; |
1663 | } | |
041c3194 ZW |
1664 | new_answer->next = node->value.answers; |
1665 | } | |
8c3b2693 | 1666 | |
93c80368 | 1667 | node->type = NT_ASSERTION; |
041c3194 | 1668 | node->value.answers = new_answer; |
8c3b2693 NB |
1669 | BUFF_FRONT (pfile->a_buff) += (sizeof (struct answer) |
1670 | + (new_answer->count - 1) | |
1671 | * sizeof (cpp_token)); | |
1672 | check_eol (pfile); | |
ff2b53ef | 1673 | } |
041c3194 | 1674 | } |
15dad1d9 | 1675 | |
5d8ebbd8 | 1676 | /* Handle #unassert. */ |
711b8824 | 1677 | static void |
041c3194 ZW |
1678 | do_unassert (pfile) |
1679 | cpp_reader *pfile; | |
1680 | { | |
1681 | cpp_hashnode *node; | |
93c80368 | 1682 | struct answer *answer; |
041c3194 | 1683 | |
93c80368 NB |
1684 | node = parse_assertion (pfile, &answer, T_UNASSERT); |
1685 | /* It isn't an error to #unassert something that isn't asserted. */ | |
1686 | if (node && node->type == NT_ASSERTION) | |
7061aa5a | 1687 | { |
93c80368 | 1688 | if (answer) |
15dad1d9 | 1689 | { |
93c80368 | 1690 | struct answer **p = find_answer (node, answer), *temp; |
041c3194 | 1691 | |
93c80368 NB |
1692 | /* Remove the answer from the list. */ |
1693 | temp = *p; | |
1694 | if (temp) | |
1695 | *p = temp->next; | |
a7abcbbf | 1696 | |
93c80368 NB |
1697 | /* Did we free the last answer? */ |
1698 | if (node->value.answers == 0) | |
1699 | node->type = NT_VOID; | |
8c3b2693 NB |
1700 | |
1701 | check_eol (pfile); | |
93c80368 NB |
1702 | } |
1703 | else | |
1704 | _cpp_free_definition (node); | |
041c3194 | 1705 | } |
93c80368 NB |
1706 | |
1707 | /* We don't commit the memory for the answer - it's temporary only. */ | |
7f2935c7 | 1708 | } |
7f2935c7 | 1709 | |
45b966db ZW |
1710 | /* These are for -D, -U, -A. */ |
1711 | ||
1712 | /* Process the string STR as if it appeared as the body of a #define. | |
1713 | If STR is just an identifier, define it with value 1. | |
1714 | If STR has anything after the identifier, then it should | |
ec5c56db | 1715 | be identifier=definition. */ |
0b22d65c | 1716 | void |
45b966db | 1717 | cpp_define (pfile, str) |
0b22d65c | 1718 | cpp_reader *pfile; |
7ceb3598 | 1719 | const char *str; |
0b22d65c | 1720 | { |
45b966db ZW |
1721 | char *buf, *p; |
1722 | size_t count; | |
1723 | ||
45b966db ZW |
1724 | /* Copy the entire option so we can modify it. |
1725 | Change the first "=" in the string to a space. If there is none, | |
86368122 NB |
1726 | tack " 1" on the end. */ |
1727 | ||
86368122 | 1728 | count = strlen (str); |
4d6baafa | 1729 | buf = (char *) alloca (count + 3); |
86368122 NB |
1730 | memcpy (buf, str, count); |
1731 | ||
1732 | p = strchr (str, '='); | |
45b966db | 1733 | if (p) |
86368122 | 1734 | buf[p - str] = ' '; |
45b966db ZW |
1735 | else |
1736 | { | |
86368122 NB |
1737 | buf[count++] = ' '; |
1738 | buf[count++] = '1'; | |
0b22d65c | 1739 | } |
4d6baafa | 1740 | buf[count] = '\0'; |
cf4ed945 | 1741 | |
29401c30 | 1742 | run_directive (pfile, T_DEFINE, buf, count); |
2c8f0515 ZW |
1743 | } |
1744 | ||
ad2a084d | 1745 | /* Slight variant of the above for use by initialize_builtins. */ |
2c8f0515 ZW |
1746 | void |
1747 | _cpp_define_builtin (pfile, str) | |
1748 | cpp_reader *pfile; | |
1749 | const char *str; | |
1750 | { | |
29401c30 | 1751 | run_directive (pfile, T_DEFINE, str, strlen (str)); |
45b966db | 1752 | } |
0f41302f | 1753 | |
45b966db ZW |
1754 | /* Process MACRO as if it appeared as the body of an #undef. */ |
1755 | void | |
1756 | cpp_undef (pfile, macro) | |
7f2935c7 | 1757 | cpp_reader *pfile; |
45b966db | 1758 | const char *macro; |
7f2935c7 | 1759 | { |
29401c30 | 1760 | run_directive (pfile, T_UNDEF, macro, strlen (macro)); |
7f2935c7 PB |
1761 | } |
1762 | ||
ec5c56db | 1763 | /* Process the string STR as if it appeared as the body of a #assert. */ |
45b966db ZW |
1764 | void |
1765 | cpp_assert (pfile, str) | |
1766 | cpp_reader *pfile; | |
1767 | const char *str; | |
1768 | { | |
86368122 | 1769 | handle_assertion (pfile, str, T_ASSERT); |
45b966db | 1770 | } |
7f2935c7 | 1771 | |
ec5c56db | 1772 | /* Process STR as if it appeared as the body of an #unassert. */ |
45b966db ZW |
1773 | void |
1774 | cpp_unassert (pfile, str) | |
7f2935c7 | 1775 | cpp_reader *pfile; |
45b966db | 1776 | const char *str; |
7f2935c7 | 1777 | { |
86368122 | 1778 | handle_assertion (pfile, str, T_UNASSERT); |
45b966db | 1779 | } |
3fdc651f | 1780 | |
86368122 NB |
1781 | /* Common code for cpp_assert (-A) and cpp_unassert (-A-). */ |
1782 | static void | |
1783 | handle_assertion (pfile, str, type) | |
1784 | cpp_reader *pfile; | |
1785 | const char *str; | |
1786 | int type; | |
1787 | { | |
1788 | size_t count = strlen (str); | |
1789 | const char *p = strchr (str, '='); | |
1790 | ||
1791 | if (p) | |
1792 | { | |
1793 | /* Copy the entire option so we can modify it. Change the first | |
1794 | "=" in the string to a '(', and tack a ')' on the end. */ | |
4d6baafa | 1795 | char *buf = (char *) alloca (count + 2); |
86368122 NB |
1796 | |
1797 | memcpy (buf, str, count); | |
1798 | buf[p - str] = '('; | |
1799 | buf[count++] = ')'; | |
4d6baafa | 1800 | buf[count] = '\0'; |
86368122 NB |
1801 | str = buf; |
1802 | } | |
1803 | ||
29401c30 | 1804 | run_directive (pfile, type, str, count); |
86368122 NB |
1805 | } |
1806 | ||
7e96d768 NB |
1807 | /* The number of errors for a given reader. */ |
1808 | unsigned int | |
1809 | cpp_errors (pfile) | |
1810 | cpp_reader *pfile; | |
1811 | { | |
1812 | return pfile->errors; | |
1813 | } | |
1814 | ||
1815 | /* The options structure. */ | |
1816 | cpp_options * | |
1817 | cpp_get_options (pfile) | |
1818 | cpp_reader *pfile; | |
1819 | { | |
1820 | return &pfile->opts; | |
1821 | } | |
1822 | ||
1823 | /* The callbacks structure. */ | |
1824 | cpp_callbacks * | |
1825 | cpp_get_callbacks (pfile) | |
1826 | cpp_reader *pfile; | |
1827 | { | |
1828 | return &pfile->cb; | |
1829 | } | |
1830 | ||
d82fc108 | 1831 | /* The line map set. */ |
47d89cf3 | 1832 | const struct line_maps * |
d82fc108 NB |
1833 | cpp_get_line_maps (pfile) |
1834 | cpp_reader *pfile; | |
1835 | { | |
1836 | return &pfile->line_maps; | |
1837 | } | |
1838 | ||
7e96d768 NB |
1839 | /* Copy the given callbacks structure to our own. */ |
1840 | void | |
1841 | cpp_set_callbacks (pfile, cb) | |
1842 | cpp_reader *pfile; | |
1843 | cpp_callbacks *cb; | |
1844 | { | |
1845 | pfile->cb = *cb; | |
1846 | } | |
1847 | ||
eb1f4d9d NB |
1848 | /* Push a new buffer on the buffer stack. Returns the new buffer; it |
1849 | doesn't fail. It does not generate a file change call back; that | |
1850 | is the responsibility of the caller. */ | |
c71f835b | 1851 | cpp_buffer * |
29401c30 | 1852 | cpp_push_buffer (pfile, buffer, len, from_stage3, return_at_eof) |
c71f835b ZW |
1853 | cpp_reader *pfile; |
1854 | const U_CHAR *buffer; | |
3cf3593f | 1855 | size_t len; |
29401c30 | 1856 | int from_stage3; |
ef6e958a | 1857 | int return_at_eof; |
c71f835b | 1858 | { |
2a967f3d | 1859 | cpp_buffer *new = xobnew (&pfile->buffer_ob, cpp_buffer); |
93c80368 | 1860 | |
fde84349 NB |
1861 | /* Clears, amongst other things, if_stack and mi_cmacro. */ |
1862 | memset (new, 0, sizeof (cpp_buffer)); | |
1863 | ||
1864 | new->line_base = new->buf = new->cur = buffer; | |
1865 | new->rlimit = buffer + len; | |
29401c30 | 1866 | new->from_stage3 = from_stage3; |
3cf3593f | 1867 | new->prev = pfile->buffer; |
ef6e958a | 1868 | new->return_at_eof = return_at_eof; |
bdcbe496 | 1869 | new->saved_flags = BOL; |
0bda4760 | 1870 | |
3cf3593f | 1871 | pfile->buffer = new; |
0bda4760 | 1872 | |
c71f835b ZW |
1873 | return new; |
1874 | } | |
1875 | ||
eb1f4d9d NB |
1876 | /* If called from do_line, pops a single buffer. Otherwise pops all |
1877 | buffers until a real file is reached. Generates appropriate | |
1878 | call-backs. */ | |
ef6e958a NB |
1879 | void |
1880 | _cpp_pop_buffer (pfile) | |
c71f835b ZW |
1881 | cpp_reader *pfile; |
1882 | { | |
fde84349 | 1883 | cpp_buffer *buffer = pfile->buffer; |
ad2a084d | 1884 | struct if_stack *ifs; |
b7e30d8a | 1885 | bool pushed = false; |
c71f835b | 1886 | |
fde84349 NB |
1887 | /* Walk back up the conditional stack till we reach its level at |
1888 | entry to this file, issuing error messages. */ | |
1889 | for (ifs = buffer->if_stack; ifs; ifs = ifs->next) | |
50410426 | 1890 | cpp_error_with_line (pfile, ifs->line, 0, |
fde84349 | 1891 | "unterminated #%s", dtable[ifs->type].name); |
eb1f4d9d | 1892 | |
97293897 | 1893 | /* In case of a missing #endif. */ |
67821e3a | 1894 | pfile->state.skipping = 0; |
29401c30 NB |
1895 | |
1896 | /* Update the reader's buffer before _cpp_do_file_change. */ | |
1897 | pfile->buffer = buffer->prev; | |
1898 | ||
1899 | if (buffer->inc) | |
b7e30d8a | 1900 | pushed = _cpp_pop_file_buffer (pfile, buffer->inc); |
29401c30 | 1901 | |
b7e30d8a AS |
1902 | if (!pushed) |
1903 | obstack_free (&pfile->buffer_ob, buffer); | |
c71f835b ZW |
1904 | } |
1905 | ||
5d8ebbd8 | 1906 | /* Enter all recognised directives in the hash table. */ |
c71f835b | 1907 | void |
2a967f3d | 1908 | _cpp_init_directives (pfile) |
c71f835b ZW |
1909 | cpp_reader *pfile; |
1910 | { | |
766ee681 | 1911 | unsigned int i; |
93c80368 | 1912 | cpp_hashnode *node; |
bfb9dc7f | 1913 | |
37b8524c | 1914 | for (i = 0; i < (unsigned int) N_DIRECTIVES; i++) |
93c80368 | 1915 | { |
766ee681 NB |
1916 | node = cpp_lookup (pfile, dtable[i].name, dtable[i].length); |
1917 | node->directive_index = i + 1; | |
93c80368 | 1918 | } |
c71f835b | 1919 | } |