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5538ada6 | 1 | /* CPP Library. |
5e7b4e25 | 2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
5793b276 | 3 | 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
5538ada6 ZW |
4 | Contributed by Per Bothner, 1994-95. |
5 | Based on CCCP program by Paul Rubin, June 1986 | |
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 | |
20 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
5538ada6 ZW |
22 | #include "config.h" |
23 | #include "system.h" | |
6de1e2a9 ZW |
24 | #include "cpplib.h" |
25 | #include "cpphash.h" | |
49e6c08e | 26 | #include "mkdeps.h" |
88ae23e7 | 27 | |
6cf87ca4 ZW |
28 | static void init_library (void); |
29 | static void mark_named_operators (cpp_reader *); | |
30 | static void read_original_filename (cpp_reader *); | |
b20d9f0c | 31 | static void read_original_directory (cpp_reader *); |
6cf87ca4 | 32 | static void post_options (cpp_reader *); |
6de1e2a9 | 33 | |
61d0346d NB |
34 | /* If we have designated initializers (GCC >2.7) these tables can be |
35 | initialized, constant data. Otherwise, they have to be filled in at | |
12cf91fe | 36 | runtime. */ |
61d0346d | 37 | #if HAVE_DESIGNATED_INITIALIZERS |
a9ae4483 | 38 | |
4a58aab6 | 39 | #define init_trigraph_map() /* Nothing. */ |
61d0346d | 40 | #define TRIGRAPH_MAP \ |
562a5c27 | 41 | __extension__ const uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { |
61d0346d | 42 | |
a9ae4483 | 43 | #define END }; |
455d2586 | 44 | #define s(p, v) [p] = v, |
61d0346d | 45 | |
a9ae4483 | 46 | #else |
61d0346d | 47 | |
562a5c27 | 48 | #define TRIGRAPH_MAP uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \ |
6cf87ca4 | 49 | static void init_trigraph_map (void) { \ |
61d0346d NB |
50 | unsigned char *x = _cpp_trigraph_map; |
51 | ||
ae79697b | 52 | #define END } |
455d2586 | 53 | #define s(p, v) x[p] = v; |
61d0346d | 54 | |
a9ae4483 | 55 | #endif |
6de1e2a9 | 56 | |
61d0346d NB |
57 | TRIGRAPH_MAP |
58 | s('=', '#') s(')', ']') s('!', '|') | |
59 | s('(', '[') s('\'', '^') s('>', '}') | |
60 | s('/', '\\') s('<', '{') s('-', '~') | |
61 | END | |
62 | ||
a9ae4483 | 63 | #undef s |
455d2586 | 64 | #undef END |
61d0346d | 65 | #undef TRIGRAPH_MAP |
6de1e2a9 | 66 | |
5d8ebbd8 NB |
67 | /* A set of booleans indicating what CPP features each source language |
68 | requires. */ | |
a01eb545 ZW |
69 | struct lang_flags |
70 | { | |
71 | char c99; | |
a01eb545 ZW |
72 | char cplusplus; |
73 | char extended_numbers; | |
58551c23 | 74 | char std; |
a01eb545 ZW |
75 | char cplusplus_comments; |
76 | char digraphs; | |
77 | }; | |
78 | ||
a01eb545 | 79 | static const struct lang_flags lang_defaults[] = |
b1822ccc NB |
80 | { /* c99 c++ xnum std // digr */ |
81 | /* GNUC89 */ { 0, 0, 1, 0, 1, 1 }, | |
82 | /* GNUC99 */ { 1, 0, 1, 0, 1, 1 }, | |
83 | /* STDC89 */ { 0, 0, 0, 1, 0, 0 }, | |
84 | /* STDC94 */ { 0, 0, 0, 1, 0, 1 }, | |
85 | /* STDC99 */ { 1, 0, 1, 1, 1, 1 }, | |
86 | /* GNUCXX */ { 0, 1, 1, 0, 1, 1 }, | |
87 | /* CXX98 */ { 0, 1, 1, 1, 1, 1 }, | |
88 | /* ASM */ { 0, 0, 1, 0, 1, 0 } | |
a01eb545 ZW |
89 | }; |
90 | ||
5d8ebbd8 | 91 | /* Sets internal flags correctly for a given language. */ |
f749a36b | 92 | void |
6cf87ca4 | 93 | cpp_set_lang (cpp_reader *pfile, enum c_lang lang) |
dd07b884 | 94 | { |
a01eb545 | 95 | const struct lang_flags *l = &lang_defaults[(int) lang]; |
df383483 | 96 | |
bdb05a7b | 97 | CPP_OPTION (pfile, lang) = lang; |
dd07b884 | 98 | |
a01eb545 | 99 | CPP_OPTION (pfile, c99) = l->c99; |
a01eb545 ZW |
100 | CPP_OPTION (pfile, cplusplus) = l->cplusplus; |
101 | CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; | |
58551c23 NB |
102 | CPP_OPTION (pfile, std) = l->std; |
103 | CPP_OPTION (pfile, trigraphs) = l->std; | |
a01eb545 ZW |
104 | CPP_OPTION (pfile, cplusplus_comments) = l->cplusplus_comments; |
105 | CPP_OPTION (pfile, digraphs) = l->digraphs; | |
dd07b884 NB |
106 | } |
107 | ||
c1bad961 | 108 | /* Initialize library global state. */ |
cf44ea52 | 109 | static void |
6cf87ca4 | 110 | init_library (void) |
cf44ea52 | 111 | { |
7ca3d2b1 NB |
112 | static int initialized = 0; |
113 | ||
114 | if (! initialized) | |
115 | { | |
116 | initialized = 1; | |
117 | ||
7ca3d2b1 NB |
118 | /* Set up the trigraph map. This doesn't need to do anything if |
119 | we were compiled with a compiler that supports C99 designated | |
120 | initializers. */ | |
121 | init_trigraph_map (); | |
122 | } | |
cf44ea52 NB |
123 | } |
124 | ||
ec5c56db | 125 | /* Initialize a cpp_reader structure. */ |
cf44ea52 | 126 | cpp_reader * |
6cf87ca4 | 127 | cpp_create_reader (enum c_lang lang, hash_table *table) |
6de1e2a9 | 128 | { |
7ca3d2b1 | 129 | cpp_reader *pfile; |
93c80368 | 130 | |
4912a07c | 131 | /* Initialize this instance of the library if it hasn't been already. */ |
674c3b40 | 132 | init_library (); |
7ca3d2b1 | 133 | |
703ad42b | 134 | pfile = xcalloc (1, sizeof (cpp_reader)); |
93c80368 | 135 | |
f749a36b | 136 | cpp_set_lang (pfile, lang); |
a5a49440 | 137 | CPP_OPTION (pfile, warn_multichar) = 1; |
ae79697b | 138 | CPP_OPTION (pfile, discard_comments) = 1; |
477cdac7 | 139 | CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; |
ae79697b | 140 | CPP_OPTION (pfile, show_column) = 1; |
6ab3e7dd | 141 | CPP_OPTION (pfile, tabstop) = 8; |
be768055 | 142 | CPP_OPTION (pfile, operator_names) = 1; |
a8eb6044 | 143 | CPP_OPTION (pfile, warn_trigraphs) = 2; |
909de5da | 144 | CPP_OPTION (pfile, warn_endif_labels) = 1; |
9fbd3e41 | 145 | CPP_OPTION (pfile, warn_deprecated) = 1; |
f4ff5a69 | 146 | CPP_OPTION (pfile, warn_long_long) = !CPP_OPTION (pfile, c99); |
b1822ccc | 147 | CPP_OPTION (pfile, dollars_in_ident) = 1; |
78b8811a | 148 | CPP_OPTION (pfile, warn_dollars) = 1; |
ae79697b | 149 | |
2443d4e1 NB |
150 | /* Default CPP arithmetic to something sensible for the host for the |
151 | benefit of dumb users like fix-header. */ | |
c9220e3a | 152 | CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); |
2443d4e1 NB |
153 | CPP_OPTION (pfile, char_precision) = CHAR_BIT; |
154 | CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); | |
155 | CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); | |
2a1dc0d8 | 156 | CPP_OPTION (pfile, unsigned_char) = 0; |
44a147ad | 157 | CPP_OPTION (pfile, unsigned_wchar) = 1; |
e6cc3a24 ZW |
158 | CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */ |
159 | ||
160 | /* Default to no charset conversion. */ | |
161 | CPP_OPTION (pfile, narrow_charset) = 0; | |
162 | CPP_OPTION (pfile, wide_charset) = 0; | |
4268e8bb | 163 | |
cf551fba EC |
164 | /* Default the input character set to iso-8859-1 for now. */ |
165 | CPP_OPTION (pfile, input_charset) = "ISO-8859-1"; | |
166 | ||
8f9b4009 NB |
167 | /* A fake empty "directory" used as the starting point for files |
168 | looked up without a search path. Name cannot be '/' because we | |
169 | don't want to prepend anything at all to filenames using it. All | |
170 | other entries are correct zero-initialized. */ | |
171 | pfile->no_search_path.name = (char *) ""; | |
172 | ||
4912a07c | 173 | /* Initialize the line map. Start at logical line 1, so we can use |
50410426 | 174 | a line number of zero for special states. */ |
a2f7be91 | 175 | linemap_init (&pfile->line_maps); |
4169c321 | 176 | pfile->line = 1; |
d82fc108 | 177 | |
4a58aab6 | 178 | /* Initialize lexer state. */ |
93c80368 NB |
179 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
180 | ||
4ed5bcfb | 181 | /* Set up static tokens. */ |
4ed5bcfb NB |
182 | pfile->avoid_paste.type = CPP_PADDING; |
183 | pfile->avoid_paste.val.source = NULL; | |
184 | pfile->eof.type = CPP_EOF; | |
185 | pfile->eof.flags = 0; | |
93c80368 | 186 | |
5fddcffc NB |
187 | /* Create a token buffer for the lexer. */ |
188 | _cpp_init_tokenrun (&pfile->base_run, 250); | |
189 | pfile->cur_run = &pfile->base_run; | |
190 | pfile->cur_token = pfile->base_run.base; | |
5fddcffc | 191 | |
4912a07c | 192 | /* Initialize the base context. */ |
93c80368 NB |
193 | pfile->context = &pfile->base_context; |
194 | pfile->base_context.macro = 0; | |
195 | pfile->base_context.prev = pfile->base_context.next = 0; | |
196 | ||
8c3b2693 NB |
197 | /* Aligned and unaligned storage. */ |
198 | pfile->a_buff = _cpp_get_buff (pfile, 0); | |
ece54d54 | 199 | pfile->u_buff = _cpp_get_buff (pfile, 0); |
93c80368 | 200 | |
87ed109f NB |
201 | /* The expression parser stack. */ |
202 | _cpp_expand_op_stack (pfile); | |
203 | ||
4912a07c | 204 | /* Initialize the buffer obstack. */ |
43839642 ZW |
205 | _obstack_begin (&pfile->buffer_ob, 0, 0, |
206 | (void *(*) (long)) xmalloc, | |
207 | (void (*) (void *)) free); | |
2a967f3d | 208 | |
8f9b4009 | 209 | _cpp_init_files (pfile); |
cf44ea52 | 210 | |
b4e46cea PB |
211 | _cpp_init_hashtable (pfile, table); |
212 | ||
cf44ea52 | 213 | return pfile; |
f2d5f0cc ZW |
214 | } |
215 | ||
400023a3 | 216 | /* Free resources used by PFILE. Accessing PFILE after this function |
8d9afc4e | 217 | returns leads to undefined behavior. Returns the error count. */ |
76c3e73e | 218 | void |
6cf87ca4 | 219 | cpp_destroy (cpp_reader *pfile) |
6de1e2a9 | 220 | { |
93c80368 | 221 | cpp_context *context, *contextn; |
50410426 | 222 | tokenrun *run, *runn; |
709e9e50 | 223 | |
87ed109f | 224 | free (pfile->op_stack); |
af0d16cd | 225 | |
38b24ee2 | 226 | while (CPP_BUFFER (pfile) != NULL) |
ef6e958a | 227 | _cpp_pop_buffer (pfile); |
6de1e2a9 | 228 | |
1a76916c NB |
229 | if (pfile->out.base) |
230 | free (pfile->out.base); | |
004cb263 | 231 | |
93c80368 | 232 | if (pfile->macro_buffer) |
4b49c365 | 233 | { |
fad205ff | 234 | free (pfile->macro_buffer); |
4b49c365 AO |
235 | pfile->macro_buffer = NULL; |
236 | pfile->macro_buffer_len = 0; | |
237 | } | |
93c80368 | 238 | |
f4ff5a69 NB |
239 | if (pfile->deps) |
240 | deps_free (pfile->deps); | |
2a967f3d | 241 | obstack_free (&pfile->buffer_ob, 0); |
49e6c08e | 242 | |
2a967f3d | 243 | _cpp_destroy_hashtable (pfile); |
8f9b4009 | 244 | _cpp_cleanup_files (pfile); |
e6cc3a24 | 245 | _cpp_destroy_iconv (pfile); |
709e9e50 | 246 | |
8c3b2693 | 247 | _cpp_free_buff (pfile->a_buff); |
ece54d54 | 248 | _cpp_free_buff (pfile->u_buff); |
b8af0ca5 | 249 | _cpp_free_buff (pfile->free_buffs); |
93c80368 | 250 | |
50410426 NB |
251 | for (run = &pfile->base_run; run; run = runn) |
252 | { | |
253 | runn = run->next; | |
254 | free (run->base); | |
255 | if (run != &pfile->base_run) | |
256 | free (run); | |
257 | } | |
258 | ||
93c80368 NB |
259 | for (context = pfile->base_context.next; context; context = contextn) |
260 | { | |
261 | contextn = context->next; | |
262 | free (context); | |
263 | } | |
400023a3 | 264 | |
a2f7be91 | 265 | linemap_free (&pfile->line_maps); |
400023a3 | 266 | free (pfile); |
6de1e2a9 ZW |
267 | } |
268 | ||
93c80368 | 269 | /* This structure defines one built-in identifier. A node will be |
f24a153a ZW |
270 | entered in the hash table under the name NAME, with value VALUE. |
271 | ||
272 | There are two tables of these. builtin_array holds all the | |
273 | "builtin" macros: these are handled by builtin_macro() in | |
274 | cppmacro.c. Builtin is somewhat of a misnomer -- the property of | |
275 | interest is that these macros require special code to compute their | |
276 | expansions. The value is a "builtin_type" enumerator. | |
277 | ||
278 | operator_array holds the C++ named operators. These are keywords | |
279 | which act as aliases for punctuators. In C++, they cannot be | |
280 | altered through #define, and #if recognizes them as operators. In | |
281 | C, these are not entered into the hash table at all (but see | |
282 | <iso646.h>). The value is a token-type enumerator. */ | |
a9ae4483 ZW |
283 | struct builtin |
284 | { | |
562a5c27 | 285 | const uchar *name; |
93c80368 | 286 | unsigned short len; |
f24a153a | 287 | unsigned short value; |
a9ae4483 | 288 | }; |
93c80368 | 289 | |
f24a153a | 290 | #define B(n, t) { DSC(n), t } |
a9ae4483 | 291 | static const struct builtin builtin_array[] = |
6de1e2a9 | 292 | { |
93c80368 NB |
293 | B("__TIME__", BT_TIME), |
294 | B("__DATE__", BT_DATE), | |
295 | B("__FILE__", BT_FILE), | |
296 | B("__BASE_FILE__", BT_BASE_FILE), | |
297 | B("__LINE__", BT_SPECLINE), | |
298 | B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL), | |
278c4662 NB |
299 | /* Keep builtins not used for -traditional-cpp at the end, and |
300 | update init_builtins() if any more are added. */ | |
644eddaa | 301 | B("_Pragma", BT_PRAGMA), |
618cdda7 | 302 | B("__STDC__", BT_STDC), |
f24a153a | 303 | }; |
92936ecf | 304 | |
f24a153a ZW |
305 | static const struct builtin operator_array[] = |
306 | { | |
307 | B("and", CPP_AND_AND), | |
308 | B("and_eq", CPP_AND_EQ), | |
309 | B("bitand", CPP_AND), | |
310 | B("bitor", CPP_OR), | |
311 | B("compl", CPP_COMPL), | |
312 | B("not", CPP_NOT), | |
313 | B("not_eq", CPP_NOT_EQ), | |
314 | B("or", CPP_OR_OR), | |
315 | B("or_eq", CPP_OR_EQ), | |
316 | B("xor", CPP_XOR), | |
317 | B("xor_eq", CPP_XOR_EQ) | |
a9ae4483 | 318 | }; |
12cf91fe | 319 | #undef B |
a9ae4483 | 320 | |
17645b15 NB |
321 | /* Mark the C++ named operators in the hash table. */ |
322 | static void | |
6cf87ca4 | 323 | mark_named_operators (cpp_reader *pfile) |
17645b15 NB |
324 | { |
325 | const struct builtin *b; | |
326 | ||
327 | for (b = operator_array; | |
328 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
329 | b++) | |
330 | { | |
331 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
332 | hp->flags |= NODE_OPERATOR; | |
4977bab6 ZW |
333 | hp->is_directive = 0; |
334 | hp->directive_index = b->value; | |
17645b15 NB |
335 | } |
336 | } | |
337 | ||
c1bad961 | 338 | /* Read the builtins table above and enter them, and language-specific |
6e270179 NB |
339 | macros, into the hash table. HOSTED is true if this is a hosted |
340 | environment. */ | |
c1bad961 | 341 | void |
6cf87ca4 | 342 | cpp_init_builtins (cpp_reader *pfile, int hosted) |
a9ae4483 | 343 | { |
a9ae4483 | 344 | const struct builtin *b; |
278c4662 | 345 | size_t n = ARRAY_SIZE (builtin_array); |
771c4df3 | 346 | |
278c4662 NB |
347 | if (CPP_OPTION (pfile, traditional)) |
348 | n -= 2; | |
349 | ||
350 | for(b = builtin_array; b < builtin_array + n; b++) | |
6de1e2a9 | 351 | { |
f24a153a ZW |
352 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
353 | hp->type = NT_MACRO; | |
354 | hp->flags |= NODE_BUILTIN | NODE_WARN; | |
355 | hp->value.builtin = b->value; | |
6de1e2a9 | 356 | } |
c740cee2 NB |
357 | |
358 | if (CPP_OPTION (pfile, cplusplus)) | |
3d90d290 | 359 | _cpp_define_builtin (pfile, "__cplusplus 1"); |
2a1dc0d8 ZW |
360 | else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
361 | _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); | |
0f7866e7 | 362 | else if (CPP_OPTION (pfile, lang) == CLK_STDC94) |
c740cee2 NB |
363 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); |
364 | else if (CPP_OPTION (pfile, c99)) | |
365 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); | |
366 | ||
6e270179 | 367 | if (hosted) |
58b5b894 | 368 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1"); |
6e270179 | 369 | else |
58b5b894 | 370 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0"); |
6e270179 | 371 | |
0f7866e7 ZL |
372 | if (CPP_OPTION (pfile, objc)) |
373 | _cpp_define_builtin (pfile, "__OBJC__ 1"); | |
4a58aab6 NB |
374 | } |
375 | ||
2443d4e1 NB |
376 | /* Sanity-checks are dependent on command-line options, so it is |
377 | called as a subroutine of cpp_read_main_file (). */ | |
378 | #if ENABLE_CHECKING | |
6cf87ca4 ZW |
379 | static void sanity_checks (cpp_reader *); |
380 | static void sanity_checks (cpp_reader *pfile) | |
2443d4e1 NB |
381 | { |
382 | cppchar_t test = 0; | |
c9220e3a | 383 | size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); |
2443d4e1 NB |
384 | |
385 | /* Sanity checks for assumptions about CPP arithmetic and target | |
386 | type precisions made by cpplib. */ | |
387 | test--; | |
388 | if (test < 1) | |
0527bc4e | 389 | cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type"); |
2443d4e1 | 390 | |
c9220e3a | 391 | if (CPP_OPTION (pfile, precision) > max_precision) |
0527bc4e | 392 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
393 | "preprocessor arithmetic has maximum precision of %lu bits;" |
394 | " target requires %lu bits", | |
c9220e3a NB |
395 | (unsigned long) max_precision, |
396 | (unsigned long) CPP_OPTION (pfile, precision)); | |
2443d4e1 NB |
397 | |
398 | if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) | |
0527bc4e | 399 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
400 | "CPP arithmetic must be at least as precise as a target int"); |
401 | ||
402 | if (CPP_OPTION (pfile, char_precision) < 8) | |
0527bc4e | 403 | cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide"); |
2443d4e1 NB |
404 | |
405 | if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 406 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
407 | "target wchar_t is narrower than target char"); |
408 | ||
409 | if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 410 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
411 | "target int is narrower than target char"); |
412 | ||
c9220e3a NB |
413 | /* This is assumed in eval_token() and could be fixed if necessary. */ |
414 | if (sizeof (cppchar_t) > sizeof (cpp_num_part)) | |
0527bc4e JDA |
415 | cpp_error (pfile, CPP_DL_ICE, |
416 | "CPP half-integer narrower than CPP character"); | |
c9220e3a | 417 | |
2443d4e1 | 418 | if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) |
0527bc4e | 419 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
420 | "CPP on this host cannot handle wide character constants over" |
421 | " %lu bits, but the target requires %lu bits", | |
c9220e3a NB |
422 | (unsigned long) BITS_PER_CPPCHAR_T, |
423 | (unsigned long) CPP_OPTION (pfile, wchar_precision)); | |
2443d4e1 NB |
424 | } |
425 | #else | |
426 | # define sanity_checks(PFILE) | |
427 | #endif | |
428 | ||
76c3e73e NB |
429 | /* Add a dependency target. Can be called any number of times before |
430 | cpp_read_main_file(). If no targets have been added before | |
431 | cpp_read_main_file(), then the default target is used. */ | |
432 | void | |
6cf87ca4 | 433 | cpp_add_dependency_target (cpp_reader *pfile, const char *target, int quote) |
76c3e73e NB |
434 | { |
435 | if (!pfile->deps) | |
436 | pfile->deps = deps_init (); | |
437 | ||
438 | deps_add_target (pfile->deps, target, quote); | |
439 | } | |
440 | ||
f5e99456 | 441 | /* This is called after options have been parsed, and partially |
59e4e217 | 442 | processed. */ |
4169c321 PB |
443 | void |
444 | cpp_post_options (cpp_reader *pfile) | |
6de1e2a9 | 445 | { |
2443d4e1 NB |
446 | sanity_checks (pfile); |
447 | ||
f4ff5a69 NB |
448 | post_options (pfile); |
449 | ||
c19b12cb NB |
450 | /* Mark named operators before handling command line macros. */ |
451 | if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) | |
452 | mark_named_operators (pfile); | |
4169c321 | 453 | } |
c19b12cb | 454 | |
4dc299fb PB |
455 | /* Setup for processing input from the file named FNAME, or stdin if |
456 | it is the empty string. Returns true if the file was found. */ | |
457 | bool | |
458 | cpp_find_main_file (cpp_reader *pfile, const char *fname) | |
4169c321 | 459 | { |
f4ff5a69 NB |
460 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
461 | { | |
462 | if (!pfile->deps) | |
463 | pfile->deps = deps_init (); | |
464 | ||
465 | /* Set the default target (if there is none already). */ | |
466 | deps_add_default_target (pfile->deps, fname); | |
467 | } | |
96302433 | 468 | |
4dc299fb PB |
469 | pfile->main_file |
470 | = _cpp_find_file (pfile, fname, &pfile->no_search_path, false); | |
471 | if (_cpp_find_failed (pfile->main_file)) | |
472 | return false; | |
f5e99456 | 473 | |
b20d9f0c AO |
474 | if (CPP_OPTION (pfile, working_directory)) |
475 | { | |
b20d9f0c AO |
476 | const char *dir = getpwd (); |
477 | char *dir_with_slashes = alloca (strlen (dir) + 3); | |
478 | ||
479 | memcpy (dir_with_slashes, dir, strlen (dir)); | |
480 | memcpy (dir_with_slashes + strlen (dir), "//", 3); | |
481 | ||
482 | if (pfile->cb.dir_change) | |
483 | pfile->cb.dir_change (pfile, dir); | |
b20d9f0c | 484 | } |
4dc299fb PB |
485 | return true; |
486 | } | |
b20d9f0c | 487 | |
4dc299fb PB |
488 | /* This function reads the file, but does not start preprocessing. |
489 | This will generate at least one file change callback, and possibly | |
490 | a line change callback. */ | |
491 | void | |
492 | cpp_push_main_file (cpp_reader *pfile) | |
493 | { | |
494 | _cpp_stack_file (pfile, pfile->main_file, false); | |
495 | ||
496 | /* For foo.i, read the original filename foo.c now, for the benefit | |
497 | of the front ends. */ | |
498 | if (CPP_OPTION (pfile, preprocessed)) | |
499 | read_original_filename (pfile); | |
500 | ||
501 | /* Set this here so the client can change the option if it wishes, | |
502 | and after stacking the main file so we don't trace the main | |
503 | file. */ | |
504 | pfile->line_maps.trace_includes = CPP_OPTION (pfile, print_include_names); | |
f5e99456 NB |
505 | } |
506 | ||
507 | /* For preprocessed files, if the first tokens are of the form # NUM. | |
508 | handle the directive so we know the original file name. This will | |
509 | generate file_change callbacks, which the front ends must handle | |
510 | appropriately given their state of initialization. */ | |
511 | static void | |
6cf87ca4 | 512 | read_original_filename (cpp_reader *pfile) |
f5e99456 NB |
513 | { |
514 | const cpp_token *token, *token1; | |
515 | ||
516 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
517 | process the directive, otherwise back up. */ | |
518 | token = _cpp_lex_direct (pfile); | |
519 | if (token->type == CPP_HASH) | |
520 | { | |
521 | token1 = _cpp_lex_direct (pfile); | |
522 | _cpp_backup_tokens (pfile, 1); | |
523 | ||
524 | /* If it's a #line directive, handle it. */ | |
525 | if (token1->type == CPP_NUMBER) | |
526 | { | |
527 | _cpp_handle_directive (pfile, token->flags & PREV_WHITE); | |
b20d9f0c | 528 | read_original_directory (pfile); |
f5e99456 NB |
529 | return; |
530 | } | |
531 | } | |
532 | ||
533 | /* Backup as if nothing happened. */ | |
534 | _cpp_backup_tokens (pfile, 1); | |
535 | } | |
536 | ||
b20d9f0c AO |
537 | /* For preprocessed files, if the tokens following the first filename |
538 | line is of the form # <line> "/path/name//", handle the | |
539 | directive so we know the original current directory. */ | |
540 | static void | |
541 | read_original_directory (cpp_reader *pfile) | |
542 | { | |
543 | const cpp_token *hash, *token; | |
544 | ||
545 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
546 | process the directive, otherwise back up. */ | |
547 | hash = _cpp_lex_direct (pfile); | |
548 | if (hash->type != CPP_HASH) | |
549 | { | |
550 | _cpp_backup_tokens (pfile, 1); | |
551 | return; | |
552 | } | |
553 | ||
554 | token = _cpp_lex_direct (pfile); | |
555 | ||
556 | if (token->type != CPP_NUMBER) | |
557 | { | |
558 | _cpp_backup_tokens (pfile, 2); | |
559 | return; | |
560 | } | |
561 | ||
562 | token = _cpp_lex_direct (pfile); | |
563 | ||
564 | if (token->type != CPP_STRING | |
565 | || ! (token->val.str.len >= 5 | |
566 | && token->val.str.text[token->val.str.len-2] == '/' | |
567 | && token->val.str.text[token->val.str.len-3] == '/')) | |
568 | { | |
569 | _cpp_backup_tokens (pfile, 3); | |
570 | return; | |
571 | } | |
572 | ||
573 | if (pfile->cb.dir_change) | |
574 | { | |
575 | char *debugdir = alloca (token->val.str.len - 3); | |
576 | ||
577 | memcpy (debugdir, (const char *) token->val.str.text + 1, | |
578 | token->val.str.len - 4); | |
579 | debugdir[token->val.str.len - 4] = '\0'; | |
580 | ||
581 | pfile->cb.dir_change (pfile, debugdir); | |
582 | } | |
583 | ||
584 | /* We want to process the fake line changes as regular changes, to | |
585 | get them output. */ | |
586 | _cpp_backup_tokens (pfile, 3); | |
587 | ||
588 | CPP_OPTION (pfile, working_directory) = false; | |
589 | } | |
590 | ||
76c3e73e NB |
591 | /* This is called at the end of preprocessing. It pops the last |
592 | buffer and writes dependency output, and returns the number of | |
593 | errors. | |
594 | ||
595 | Maybe it should also reset state, such that you could call | |
596 | cpp_start_read with a new filename to restart processing. */ | |
597 | int | |
6cf87ca4 | 598 | cpp_finish (cpp_reader *pfile, FILE *deps_stream) |
6de1e2a9 | 599 | { |
a69cbaac NB |
600 | /* Warn about unused macros before popping the final buffer. */ |
601 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
602 | cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); | |
603 | ||
7364fdd8 NB |
604 | /* cpplex.c leaves the final buffer on the stack. This it so that |
605 | it returns an unending stream of CPP_EOFs to the client. If we | |
a1f300c0 | 606 | popped the buffer, we'd dereference a NULL buffer pointer and |
7364fdd8 NB |
607 | segfault. It's nice to allow the client to do worry-free excess |
608 | cpp_get_token calls. */ | |
609 | while (pfile->buffer) | |
610 | _cpp_pop_buffer (pfile); | |
c1212d2f | 611 | |
76c3e73e | 612 | /* Don't write the deps file if there are errors. */ |
f4ff5a69 NB |
613 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE |
614 | && deps_stream && pfile->errors == 0) | |
76c3e73e NB |
615 | { |
616 | deps_write (pfile->deps, deps_stream, 72); | |
617 | ||
f4ff5a69 | 618 | if (CPP_OPTION (pfile, deps.phony_targets)) |
76c3e73e NB |
619 | deps_phony_targets (pfile->deps, deps_stream); |
620 | } | |
3caee4a8 | 621 | |
d4506961 ZW |
622 | /* Report on headers that could use multiple include guards. */ |
623 | if (CPP_OPTION (pfile, print_include_names)) | |
c71f835b | 624 | _cpp_report_missing_guards (pfile); |
76c3e73e NB |
625 | |
626 | return pfile->errors; | |
6de1e2a9 ZW |
627 | } |
628 | ||
f4ff5a69 | 629 | static void |
6cf87ca4 | 630 | post_options (cpp_reader *pfile) |
96302433 NB |
631 | { |
632 | /* -Wtraditional is not useful in C++ mode. */ | |
633 | if (CPP_OPTION (pfile, cplusplus)) | |
634 | CPP_OPTION (pfile, warn_traditional) = 0; | |
635 | ||
6d4587f7 | 636 | /* Permanently disable macro expansion if we are rescanning |
43612ffb | 637 | preprocessed text. Read preprocesed source in ISO mode. */ |
6d4587f7 | 638 | if (CPP_OPTION (pfile, preprocessed)) |
43612ffb NB |
639 | { |
640 | pfile->state.prevent_expansion = 1; | |
641 | CPP_OPTION (pfile, traditional) = 0; | |
642 | } | |
643 | ||
a8eb6044 NB |
644 | if (CPP_OPTION (pfile, warn_trigraphs) == 2) |
645 | CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs); | |
646 | ||
43612ffb | 647 | if (CPP_OPTION (pfile, traditional)) |
26aea073 NB |
648 | { |
649 | /* Traditional CPP does not accurately track column information. */ | |
650 | CPP_OPTION (pfile, show_column) = 0; | |
651 | CPP_OPTION (pfile, trigraphs) = 0; | |
652 | CPP_OPTION (pfile, warn_trigraphs) = 0; | |
653 | } | |
7ca3d2b1 | 654 | } |