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5538ada6 | 1 | /* CPP Library. |
5e7b4e25 | 2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
5ffeb913 | 3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007 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 | |
200031d1 | 20 | Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
5538ada6 | 21 | |
5538ada6 ZW |
22 | #include "config.h" |
23 | #include "system.h" | |
6de1e2a9 | 24 | #include "cpplib.h" |
4f4e53dd | 25 | #include "internal.h" |
49e6c08e | 26 | #include "mkdeps.h" |
018a4785 | 27 | #include "localedir.h" |
88ae23e7 | 28 | |
6cf87ca4 ZW |
29 | static void init_library (void); |
30 | static void mark_named_operators (cpp_reader *); | |
31 | static void read_original_filename (cpp_reader *); | |
b20d9f0c | 32 | static void read_original_directory (cpp_reader *); |
6cf87ca4 | 33 | static void post_options (cpp_reader *); |
6de1e2a9 | 34 | |
61d0346d NB |
35 | /* If we have designated initializers (GCC >2.7) these tables can be |
36 | initialized, constant data. Otherwise, they have to be filled in at | |
12cf91fe | 37 | runtime. */ |
61d0346d | 38 | #if HAVE_DESIGNATED_INITIALIZERS |
a9ae4483 | 39 | |
4a58aab6 | 40 | #define init_trigraph_map() /* Nothing. */ |
61d0346d | 41 | #define TRIGRAPH_MAP \ |
562a5c27 | 42 | __extension__ const uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { |
61d0346d | 43 | |
a9ae4483 | 44 | #define END }; |
455d2586 | 45 | #define s(p, v) [p] = v, |
61d0346d | 46 | |
a9ae4483 | 47 | #else |
61d0346d | 48 | |
562a5c27 | 49 | #define TRIGRAPH_MAP uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \ |
6cf87ca4 | 50 | static void init_trigraph_map (void) { \ |
61d0346d NB |
51 | unsigned char *x = _cpp_trigraph_map; |
52 | ||
ae79697b | 53 | #define END } |
455d2586 | 54 | #define s(p, v) x[p] = v; |
61d0346d | 55 | |
a9ae4483 | 56 | #endif |
6de1e2a9 | 57 | |
61d0346d NB |
58 | TRIGRAPH_MAP |
59 | s('=', '#') s(')', ']') s('!', '|') | |
60 | s('(', '[') s('\'', '^') s('>', '}') | |
61 | s('/', '\\') s('<', '{') s('-', '~') | |
62 | END | |
63 | ||
a9ae4483 | 64 | #undef s |
455d2586 | 65 | #undef END |
61d0346d | 66 | #undef TRIGRAPH_MAP |
6de1e2a9 | 67 | |
5d8ebbd8 NB |
68 | /* A set of booleans indicating what CPP features each source language |
69 | requires. */ | |
a01eb545 ZW |
70 | struct lang_flags |
71 | { | |
72 | char c99; | |
a01eb545 ZW |
73 | char cplusplus; |
74 | char extended_numbers; | |
af15a2fe | 75 | char extended_identifiers; |
58551c23 | 76 | char std; |
a01eb545 ZW |
77 | char cplusplus_comments; |
78 | char digraphs; | |
79 | }; | |
80 | ||
a01eb545 | 81 | static const struct lang_flags lang_defaults[] = |
af15a2fe | 82 | { /* c99 c++ xnum xid std // digr */ |
dfafdaa6 DG |
83 | /* GNUC89 */ { 0, 0, 1, 0, 0, 1, 1 }, |
84 | /* GNUC99 */ { 1, 0, 1, 0, 0, 1, 1 }, | |
85 | /* STDC89 */ { 0, 0, 0, 0, 1, 0, 0 }, | |
86 | /* STDC94 */ { 0, 0, 0, 0, 1, 0, 1 }, | |
87 | /* STDC99 */ { 1, 0, 1, 0, 1, 1, 1 }, | |
88 | /* GNUCXX */ { 0, 1, 1, 0, 0, 1, 1 }, | |
89 | /* CXX98 */ { 0, 1, 1, 0, 1, 1, 1 }, | |
90 | /* GNUCXX0X */ { 1, 1, 1, 0, 0, 1, 1 }, | |
91 | /* CXX0X */ { 1, 1, 1, 0, 1, 1, 1 }, | |
92 | /* ASM */ { 0, 0, 1, 0, 0, 1, 0 } | |
93 | /* xid should be 1 for GNUC99, STDC99, GNUCXX, CXX98, GNUCXX0X, and | |
94 | CXX0X when no longer experimental (when all uses of identifiers | |
95 | in the compiler have been audited for correct handling of | |
96 | extended identifiers). */ | |
a01eb545 ZW |
97 | }; |
98 | ||
5d8ebbd8 | 99 | /* Sets internal flags correctly for a given language. */ |
f749a36b | 100 | void |
6cf87ca4 | 101 | cpp_set_lang (cpp_reader *pfile, enum c_lang lang) |
dd07b884 | 102 | { |
a01eb545 | 103 | const struct lang_flags *l = &lang_defaults[(int) lang]; |
df383483 | 104 | |
bdb05a7b | 105 | CPP_OPTION (pfile, lang) = lang; |
dd07b884 | 106 | |
af15a2fe JM |
107 | CPP_OPTION (pfile, c99) = l->c99; |
108 | CPP_OPTION (pfile, cplusplus) = l->cplusplus; | |
109 | CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; | |
110 | CPP_OPTION (pfile, extended_identifiers) = l->extended_identifiers; | |
111 | CPP_OPTION (pfile, std) = l->std; | |
112 | CPP_OPTION (pfile, trigraphs) = l->std; | |
113 | CPP_OPTION (pfile, cplusplus_comments) = l->cplusplus_comments; | |
114 | CPP_OPTION (pfile, digraphs) = l->digraphs; | |
dd07b884 NB |
115 | } |
116 | ||
c1bad961 | 117 | /* Initialize library global state. */ |
cf44ea52 | 118 | static void |
6cf87ca4 | 119 | init_library (void) |
cf44ea52 | 120 | { |
7ca3d2b1 NB |
121 | static int initialized = 0; |
122 | ||
123 | if (! initialized) | |
124 | { | |
125 | initialized = 1; | |
126 | ||
7ca3d2b1 NB |
127 | /* Set up the trigraph map. This doesn't need to do anything if |
128 | we were compiled with a compiler that supports C99 designated | |
129 | initializers. */ | |
130 | init_trigraph_map (); | |
4f4e53dd PB |
131 | |
132 | #ifdef ENABLE_NLS | |
85eac2a0 | 133 | (void) bindtextdomain (PACKAGE, LOCALEDIR); |
4f4e53dd | 134 | #endif |
7ca3d2b1 | 135 | } |
cf44ea52 NB |
136 | } |
137 | ||
ec5c56db | 138 | /* Initialize a cpp_reader structure. */ |
cf44ea52 | 139 | cpp_reader * |
50f59cd7 PB |
140 | cpp_create_reader (enum c_lang lang, hash_table *table, |
141 | struct line_maps *line_table) | |
6de1e2a9 | 142 | { |
7ca3d2b1 | 143 | cpp_reader *pfile; |
93c80368 | 144 | |
4912a07c | 145 | /* Initialize this instance of the library if it hasn't been already. */ |
674c3b40 | 146 | init_library (); |
7ca3d2b1 | 147 | |
c3f829c1 | 148 | pfile = XCNEW (cpp_reader); |
93c80368 | 149 | |
f749a36b | 150 | cpp_set_lang (pfile, lang); |
a5a49440 | 151 | CPP_OPTION (pfile, warn_multichar) = 1; |
ae79697b | 152 | CPP_OPTION (pfile, discard_comments) = 1; |
477cdac7 | 153 | CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; |
ae79697b | 154 | CPP_OPTION (pfile, show_column) = 1; |
6ab3e7dd | 155 | CPP_OPTION (pfile, tabstop) = 8; |
be768055 | 156 | CPP_OPTION (pfile, operator_names) = 1; |
a8eb6044 | 157 | CPP_OPTION (pfile, warn_trigraphs) = 2; |
909de5da | 158 | CPP_OPTION (pfile, warn_endif_labels) = 1; |
9fbd3e41 | 159 | CPP_OPTION (pfile, warn_deprecated) = 1; |
f4ff5a69 | 160 | CPP_OPTION (pfile, warn_long_long) = !CPP_OPTION (pfile, c99); |
b1822ccc | 161 | CPP_OPTION (pfile, dollars_in_ident) = 1; |
78b8811a | 162 | CPP_OPTION (pfile, warn_dollars) = 1; |
e5b79219 | 163 | CPP_OPTION (pfile, warn_variadic_macros) = 1; |
50668cf6 | 164 | CPP_OPTION (pfile, warn_normalize) = normalized_C; |
ae79697b | 165 | |
2443d4e1 NB |
166 | /* Default CPP arithmetic to something sensible for the host for the |
167 | benefit of dumb users like fix-header. */ | |
c9220e3a | 168 | CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); |
2443d4e1 NB |
169 | CPP_OPTION (pfile, char_precision) = CHAR_BIT; |
170 | CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); | |
171 | CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); | |
2a1dc0d8 | 172 | CPP_OPTION (pfile, unsigned_char) = 0; |
44a147ad | 173 | CPP_OPTION (pfile, unsigned_wchar) = 1; |
e6cc3a24 ZW |
174 | CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */ |
175 | ||
176 | /* Default to no charset conversion. */ | |
16dd5cfe | 177 | CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding (); |
e6cc3a24 | 178 | CPP_OPTION (pfile, wide_charset) = 0; |
4268e8bb | 179 | |
16dd5cfe EC |
180 | /* Default the input character set to UTF-8. */ |
181 | CPP_OPTION (pfile, input_charset) = _cpp_default_encoding (); | |
cf551fba | 182 | |
8f9b4009 NB |
183 | /* A fake empty "directory" used as the starting point for files |
184 | looked up without a search path. Name cannot be '/' because we | |
185 | don't want to prepend anything at all to filenames using it. All | |
186 | other entries are correct zero-initialized. */ | |
187 | pfile->no_search_path.name = (char *) ""; | |
188 | ||
500bee0a | 189 | /* Initialize the line map. */ |
50f59cd7 | 190 | pfile->line_table = line_table; |
d82fc108 | 191 | |
4a58aab6 | 192 | /* Initialize lexer state. */ |
93c80368 NB |
193 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
194 | ||
4ed5bcfb | 195 | /* Set up static tokens. */ |
4ed5bcfb NB |
196 | pfile->avoid_paste.type = CPP_PADDING; |
197 | pfile->avoid_paste.val.source = NULL; | |
198 | pfile->eof.type = CPP_EOF; | |
199 | pfile->eof.flags = 0; | |
93c80368 | 200 | |
5fddcffc NB |
201 | /* Create a token buffer for the lexer. */ |
202 | _cpp_init_tokenrun (&pfile->base_run, 250); | |
203 | pfile->cur_run = &pfile->base_run; | |
204 | pfile->cur_token = pfile->base_run.base; | |
5fddcffc | 205 | |
4912a07c | 206 | /* Initialize the base context. */ |
93c80368 NB |
207 | pfile->context = &pfile->base_context; |
208 | pfile->base_context.macro = 0; | |
209 | pfile->base_context.prev = pfile->base_context.next = 0; | |
210 | ||
8c3b2693 NB |
211 | /* Aligned and unaligned storage. */ |
212 | pfile->a_buff = _cpp_get_buff (pfile, 0); | |
ece54d54 | 213 | pfile->u_buff = _cpp_get_buff (pfile, 0); |
93c80368 | 214 | |
87ed109f NB |
215 | /* The expression parser stack. */ |
216 | _cpp_expand_op_stack (pfile); | |
217 | ||
4912a07c | 218 | /* Initialize the buffer obstack. */ |
43839642 ZW |
219 | _obstack_begin (&pfile->buffer_ob, 0, 0, |
220 | (void *(*) (long)) xmalloc, | |
221 | (void (*) (void *)) free); | |
2a967f3d | 222 | |
8f9b4009 | 223 | _cpp_init_files (pfile); |
cf44ea52 | 224 | |
b4e46cea PB |
225 | _cpp_init_hashtable (pfile, table); |
226 | ||
cf44ea52 | 227 | return pfile; |
f2d5f0cc ZW |
228 | } |
229 | ||
5ffeb913 TT |
230 | /* Set the line_table entry in PFILE. This is called after reading a |
231 | PCH file, as the old line_table will be incorrect. */ | |
232 | void | |
233 | cpp_set_line_map (cpp_reader *pfile, struct line_maps *line_table) | |
234 | { | |
235 | pfile->line_table = line_table; | |
236 | } | |
237 | ||
400023a3 | 238 | /* Free resources used by PFILE. Accessing PFILE after this function |
8d9afc4e | 239 | returns leads to undefined behavior. Returns the error count. */ |
76c3e73e | 240 | void |
6cf87ca4 | 241 | cpp_destroy (cpp_reader *pfile) |
6de1e2a9 | 242 | { |
93c80368 | 243 | cpp_context *context, *contextn; |
50410426 | 244 | tokenrun *run, *runn; |
709e9e50 | 245 | |
87ed109f | 246 | free (pfile->op_stack); |
af0d16cd | 247 | |
38b24ee2 | 248 | while (CPP_BUFFER (pfile) != NULL) |
ef6e958a | 249 | _cpp_pop_buffer (pfile); |
6de1e2a9 | 250 | |
1a76916c NB |
251 | if (pfile->out.base) |
252 | free (pfile->out.base); | |
004cb263 | 253 | |
93c80368 | 254 | if (pfile->macro_buffer) |
4b49c365 | 255 | { |
fad205ff | 256 | free (pfile->macro_buffer); |
4b49c365 AO |
257 | pfile->macro_buffer = NULL; |
258 | pfile->macro_buffer_len = 0; | |
259 | } | |
93c80368 | 260 | |
f4ff5a69 NB |
261 | if (pfile->deps) |
262 | deps_free (pfile->deps); | |
2a967f3d | 263 | obstack_free (&pfile->buffer_ob, 0); |
49e6c08e | 264 | |
2a967f3d | 265 | _cpp_destroy_hashtable (pfile); |
8f9b4009 | 266 | _cpp_cleanup_files (pfile); |
e6cc3a24 | 267 | _cpp_destroy_iconv (pfile); |
709e9e50 | 268 | |
8c3b2693 | 269 | _cpp_free_buff (pfile->a_buff); |
ece54d54 | 270 | _cpp_free_buff (pfile->u_buff); |
b8af0ca5 | 271 | _cpp_free_buff (pfile->free_buffs); |
93c80368 | 272 | |
50410426 NB |
273 | for (run = &pfile->base_run; run; run = runn) |
274 | { | |
275 | runn = run->next; | |
276 | free (run->base); | |
277 | if (run != &pfile->base_run) | |
278 | free (run); | |
279 | } | |
280 | ||
93c80368 NB |
281 | for (context = pfile->base_context.next; context; context = contextn) |
282 | { | |
283 | contextn = context->next; | |
284 | free (context); | |
285 | } | |
400023a3 | 286 | |
400023a3 | 287 | free (pfile); |
6de1e2a9 ZW |
288 | } |
289 | ||
93c80368 | 290 | /* This structure defines one built-in identifier. A node will be |
f24a153a ZW |
291 | entered in the hash table under the name NAME, with value VALUE. |
292 | ||
293 | There are two tables of these. builtin_array holds all the | |
294 | "builtin" macros: these are handled by builtin_macro() in | |
a2566ae9 | 295 | macro.c. Builtin is somewhat of a misnomer -- the property of |
f24a153a ZW |
296 | interest is that these macros require special code to compute their |
297 | expansions. The value is a "builtin_type" enumerator. | |
298 | ||
299 | operator_array holds the C++ named operators. These are keywords | |
300 | which act as aliases for punctuators. In C++, they cannot be | |
301 | altered through #define, and #if recognizes them as operators. In | |
302 | C, these are not entered into the hash table at all (but see | |
303 | <iso646.h>). The value is a token-type enumerator. */ | |
a9ae4483 ZW |
304 | struct builtin |
305 | { | |
562a5c27 | 306 | const uchar *name; |
93c80368 | 307 | unsigned short len; |
f24a153a | 308 | unsigned short value; |
a9ae4483 | 309 | }; |
93c80368 | 310 | |
f24a153a | 311 | #define B(n, t) { DSC(n), t } |
a9ae4483 | 312 | static const struct builtin builtin_array[] = |
6de1e2a9 | 313 | { |
be8ac3e2 | 314 | B("__TIMESTAMP__", BT_TIMESTAMP), |
93c80368 NB |
315 | B("__TIME__", BT_TIME), |
316 | B("__DATE__", BT_DATE), | |
317 | B("__FILE__", BT_FILE), | |
318 | B("__BASE_FILE__", BT_BASE_FILE), | |
319 | B("__LINE__", BT_SPECLINE), | |
320 | B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL), | |
a702045a | 321 | B("__COUNTER__", BT_COUNTER), |
278c4662 NB |
322 | /* Keep builtins not used for -traditional-cpp at the end, and |
323 | update init_builtins() if any more are added. */ | |
644eddaa | 324 | B("_Pragma", BT_PRAGMA), |
618cdda7 | 325 | B("__STDC__", BT_STDC), |
f24a153a | 326 | }; |
92936ecf | 327 | |
f24a153a ZW |
328 | static const struct builtin operator_array[] = |
329 | { | |
330 | B("and", CPP_AND_AND), | |
331 | B("and_eq", CPP_AND_EQ), | |
332 | B("bitand", CPP_AND), | |
333 | B("bitor", CPP_OR), | |
334 | B("compl", CPP_COMPL), | |
335 | B("not", CPP_NOT), | |
336 | B("not_eq", CPP_NOT_EQ), | |
337 | B("or", CPP_OR_OR), | |
338 | B("or_eq", CPP_OR_EQ), | |
339 | B("xor", CPP_XOR), | |
340 | B("xor_eq", CPP_XOR_EQ) | |
a9ae4483 | 341 | }; |
12cf91fe | 342 | #undef B |
a9ae4483 | 343 | |
17645b15 NB |
344 | /* Mark the C++ named operators in the hash table. */ |
345 | static void | |
6cf87ca4 | 346 | mark_named_operators (cpp_reader *pfile) |
17645b15 NB |
347 | { |
348 | const struct builtin *b; | |
349 | ||
350 | for (b = operator_array; | |
351 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
352 | b++) | |
353 | { | |
354 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
355 | hp->flags |= NODE_OPERATOR; | |
4977bab6 ZW |
356 | hp->is_directive = 0; |
357 | hp->directive_index = b->value; | |
17645b15 NB |
358 | } |
359 | } | |
360 | ||
c1bad961 | 361 | void |
ccfc4c91 | 362 | cpp_init_special_builtins (cpp_reader *pfile) |
a9ae4483 | 363 | { |
a9ae4483 | 364 | const struct builtin *b; |
278c4662 | 365 | size_t n = ARRAY_SIZE (builtin_array); |
771c4df3 | 366 | |
278c4662 NB |
367 | if (CPP_OPTION (pfile, traditional)) |
368 | n -= 2; | |
83900997 JJ |
369 | else if (! CPP_OPTION (pfile, stdc_0_in_system_headers) |
370 | || CPP_OPTION (pfile, std)) | |
ccfc4c91 | 371 | n--; |
278c4662 | 372 | |
83900997 | 373 | for (b = builtin_array; b < builtin_array + n; b++) |
6de1e2a9 | 374 | { |
f24a153a ZW |
375 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
376 | hp->type = NT_MACRO; | |
377 | hp->flags |= NODE_BUILTIN | NODE_WARN; | |
c3f829c1 | 378 | hp->value.builtin = (enum builtin_type) b->value; |
6de1e2a9 | 379 | } |
ccfc4c91 OW |
380 | } |
381 | ||
382 | /* Read the builtins table above and enter them, and language-specific | |
383 | macros, into the hash table. HOSTED is true if this is a hosted | |
384 | environment. */ | |
385 | void | |
386 | cpp_init_builtins (cpp_reader *pfile, int hosted) | |
387 | { | |
388 | cpp_init_special_builtins (pfile); | |
389 | ||
390 | if (!CPP_OPTION (pfile, traditional) | |
391 | && (! CPP_OPTION (pfile, stdc_0_in_system_headers) | |
392 | || CPP_OPTION (pfile, std))) | |
393 | _cpp_define_builtin (pfile, "__STDC__ 1"); | |
c740cee2 NB |
394 | |
395 | if (CPP_OPTION (pfile, cplusplus)) | |
3d90d290 | 396 | _cpp_define_builtin (pfile, "__cplusplus 1"); |
2a1dc0d8 ZW |
397 | else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
398 | _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); | |
0f7866e7 | 399 | else if (CPP_OPTION (pfile, lang) == CLK_STDC94) |
c740cee2 NB |
400 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); |
401 | else if (CPP_OPTION (pfile, c99)) | |
402 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); | |
403 | ||
6e270179 | 404 | if (hosted) |
58b5b894 | 405 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1"); |
6e270179 | 406 | else |
58b5b894 | 407 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0"); |
6e270179 | 408 | |
0f7866e7 ZL |
409 | if (CPP_OPTION (pfile, objc)) |
410 | _cpp_define_builtin (pfile, "__OBJC__ 1"); | |
4a58aab6 NB |
411 | } |
412 | ||
2443d4e1 NB |
413 | /* Sanity-checks are dependent on command-line options, so it is |
414 | called as a subroutine of cpp_read_main_file (). */ | |
415 | #if ENABLE_CHECKING | |
6cf87ca4 ZW |
416 | static void sanity_checks (cpp_reader *); |
417 | static void sanity_checks (cpp_reader *pfile) | |
2443d4e1 NB |
418 | { |
419 | cppchar_t test = 0; | |
c9220e3a | 420 | size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); |
2443d4e1 NB |
421 | |
422 | /* Sanity checks for assumptions about CPP arithmetic and target | |
423 | type precisions made by cpplib. */ | |
424 | test--; | |
425 | if (test < 1) | |
0527bc4e | 426 | cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type"); |
2443d4e1 | 427 | |
c9220e3a | 428 | if (CPP_OPTION (pfile, precision) > max_precision) |
0527bc4e | 429 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
430 | "preprocessor arithmetic has maximum precision of %lu bits;" |
431 | " target requires %lu bits", | |
c9220e3a NB |
432 | (unsigned long) max_precision, |
433 | (unsigned long) CPP_OPTION (pfile, precision)); | |
2443d4e1 NB |
434 | |
435 | if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) | |
0527bc4e | 436 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
437 | "CPP arithmetic must be at least as precise as a target int"); |
438 | ||
439 | if (CPP_OPTION (pfile, char_precision) < 8) | |
0527bc4e | 440 | cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide"); |
2443d4e1 NB |
441 | |
442 | if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 443 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
444 | "target wchar_t is narrower than target char"); |
445 | ||
446 | if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 447 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
448 | "target int is narrower than target char"); |
449 | ||
c9220e3a NB |
450 | /* This is assumed in eval_token() and could be fixed if necessary. */ |
451 | if (sizeof (cppchar_t) > sizeof (cpp_num_part)) | |
0527bc4e JDA |
452 | cpp_error (pfile, CPP_DL_ICE, |
453 | "CPP half-integer narrower than CPP character"); | |
c9220e3a | 454 | |
2443d4e1 | 455 | if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) |
0527bc4e | 456 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
457 | "CPP on this host cannot handle wide character constants over" |
458 | " %lu bits, but the target requires %lu bits", | |
c9220e3a NB |
459 | (unsigned long) BITS_PER_CPPCHAR_T, |
460 | (unsigned long) CPP_OPTION (pfile, wchar_precision)); | |
2443d4e1 NB |
461 | } |
462 | #else | |
463 | # define sanity_checks(PFILE) | |
464 | #endif | |
465 | ||
f5e99456 | 466 | /* This is called after options have been parsed, and partially |
59e4e217 | 467 | processed. */ |
4169c321 PB |
468 | void |
469 | cpp_post_options (cpp_reader *pfile) | |
6de1e2a9 | 470 | { |
2443d4e1 NB |
471 | sanity_checks (pfile); |
472 | ||
f4ff5a69 NB |
473 | post_options (pfile); |
474 | ||
c19b12cb NB |
475 | /* Mark named operators before handling command line macros. */ |
476 | if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) | |
477 | mark_named_operators (pfile); | |
4169c321 | 478 | } |
c19b12cb | 479 | |
4dc299fb | 480 | /* Setup for processing input from the file named FNAME, or stdin if |
8e9ea4d7 PB |
481 | it is the empty string. Return the original filename |
482 | on success (e.g. foo.i->foo.c), or NULL on failure. */ | |
483 | const char * | |
484 | cpp_read_main_file (cpp_reader *pfile, const char *fname) | |
4169c321 | 485 | { |
f4ff5a69 NB |
486 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
487 | { | |
488 | if (!pfile->deps) | |
489 | pfile->deps = deps_init (); | |
490 | ||
491 | /* Set the default target (if there is none already). */ | |
492 | deps_add_default_target (pfile->deps, fname); | |
493 | } | |
96302433 | 494 | |
4dc299fb | 495 | pfile->main_file |
6568f34b | 496 | = _cpp_find_file (pfile, fname, &pfile->no_search_path, false, 0); |
4dc299fb | 497 | if (_cpp_find_failed (pfile->main_file)) |
3092d0fc | 498 | return NULL; |
f5e99456 | 499 | |
4dc299fb PB |
500 | _cpp_stack_file (pfile, pfile->main_file, false); |
501 | ||
502 | /* For foo.i, read the original filename foo.c now, for the benefit | |
503 | of the front ends. */ | |
504 | if (CPP_OPTION (pfile, preprocessed)) | |
8e9ea4d7 PB |
505 | { |
506 | read_original_filename (pfile); | |
12f9df4e | 507 | fname = pfile->line_table->maps[pfile->line_table->used-1].to_file; |
8e9ea4d7 PB |
508 | } |
509 | return fname; | |
f5e99456 NB |
510 | } |
511 | ||
512 | /* For preprocessed files, if the first tokens are of the form # NUM. | |
513 | handle the directive so we know the original file name. This will | |
514 | generate file_change callbacks, which the front ends must handle | |
515 | appropriately given their state of initialization. */ | |
516 | static void | |
6cf87ca4 | 517 | read_original_filename (cpp_reader *pfile) |
f5e99456 NB |
518 | { |
519 | const cpp_token *token, *token1; | |
520 | ||
521 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
522 | process the directive, otherwise back up. */ | |
523 | token = _cpp_lex_direct (pfile); | |
524 | if (token->type == CPP_HASH) | |
525 | { | |
456b8ce5 | 526 | pfile->state.in_directive = 1; |
f5e99456 NB |
527 | token1 = _cpp_lex_direct (pfile); |
528 | _cpp_backup_tokens (pfile, 1); | |
456b8ce5 | 529 | pfile->state.in_directive = 0; |
f5e99456 NB |
530 | |
531 | /* If it's a #line directive, handle it. */ | |
532 | if (token1->type == CPP_NUMBER) | |
533 | { | |
534 | _cpp_handle_directive (pfile, token->flags & PREV_WHITE); | |
b20d9f0c | 535 | read_original_directory (pfile); |
f5e99456 NB |
536 | return; |
537 | } | |
538 | } | |
539 | ||
540 | /* Backup as if nothing happened. */ | |
541 | _cpp_backup_tokens (pfile, 1); | |
542 | } | |
543 | ||
b20d9f0c AO |
544 | /* For preprocessed files, if the tokens following the first filename |
545 | line is of the form # <line> "/path/name//", handle the | |
546 | directive so we know the original current directory. */ | |
547 | static void | |
548 | read_original_directory (cpp_reader *pfile) | |
549 | { | |
550 | const cpp_token *hash, *token; | |
551 | ||
552 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
553 | process the directive, otherwise back up. */ | |
554 | hash = _cpp_lex_direct (pfile); | |
555 | if (hash->type != CPP_HASH) | |
556 | { | |
557 | _cpp_backup_tokens (pfile, 1); | |
558 | return; | |
559 | } | |
560 | ||
561 | token = _cpp_lex_direct (pfile); | |
562 | ||
563 | if (token->type != CPP_NUMBER) | |
564 | { | |
565 | _cpp_backup_tokens (pfile, 2); | |
566 | return; | |
567 | } | |
568 | ||
569 | token = _cpp_lex_direct (pfile); | |
570 | ||
571 | if (token->type != CPP_STRING | |
572 | || ! (token->val.str.len >= 5 | |
573 | && token->val.str.text[token->val.str.len-2] == '/' | |
574 | && token->val.str.text[token->val.str.len-3] == '/')) | |
575 | { | |
576 | _cpp_backup_tokens (pfile, 3); | |
577 | return; | |
578 | } | |
579 | ||
580 | if (pfile->cb.dir_change) | |
581 | { | |
c3f829c1 | 582 | char *debugdir = (char *) alloca (token->val.str.len - 3); |
b20d9f0c AO |
583 | |
584 | memcpy (debugdir, (const char *) token->val.str.text + 1, | |
585 | token->val.str.len - 4); | |
586 | debugdir[token->val.str.len - 4] = '\0'; | |
587 | ||
588 | pfile->cb.dir_change (pfile, debugdir); | |
8e9ea4d7 | 589 | } |
b20d9f0c AO |
590 | } |
591 | ||
76c3e73e NB |
592 | /* This is called at the end of preprocessing. It pops the last |
593 | buffer and writes dependency output, and returns the number of | |
594 | errors. | |
16dd5cfe | 595 | |
76c3e73e NB |
596 | Maybe it should also reset state, such that you could call |
597 | cpp_start_read with a new filename to restart processing. */ | |
598 | int | |
6cf87ca4 | 599 | cpp_finish (cpp_reader *pfile, FILE *deps_stream) |
6de1e2a9 | 600 | { |
a69cbaac NB |
601 | /* Warn about unused macros before popping the final buffer. */ |
602 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
603 | cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); | |
604 | ||
a2566ae9 | 605 | /* lex.c leaves the final buffer on the stack. This it so that |
7364fdd8 | 606 | it returns an unending stream of CPP_EOFs to the client. If we |
a1f300c0 | 607 | popped the buffer, we'd dereference a NULL buffer pointer and |
7364fdd8 NB |
608 | segfault. It's nice to allow the client to do worry-free excess |
609 | cpp_get_token calls. */ | |
610 | while (pfile->buffer) | |
611 | _cpp_pop_buffer (pfile); | |
c1212d2f | 612 | |
76c3e73e | 613 | /* Don't write the deps file if there are errors. */ |
f4ff5a69 NB |
614 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE |
615 | && deps_stream && pfile->errors == 0) | |
76c3e73e NB |
616 | { |
617 | deps_write (pfile->deps, deps_stream, 72); | |
618 | ||
f4ff5a69 | 619 | if (CPP_OPTION (pfile, deps.phony_targets)) |
76c3e73e NB |
620 | deps_phony_targets (pfile->deps, deps_stream); |
621 | } | |
3caee4a8 | 622 | |
d4506961 ZW |
623 | /* Report on headers that could use multiple include guards. */ |
624 | if (CPP_OPTION (pfile, print_include_names)) | |
c71f835b | 625 | _cpp_report_missing_guards (pfile); |
76c3e73e NB |
626 | |
627 | return pfile->errors; | |
6de1e2a9 ZW |
628 | } |
629 | ||
f4ff5a69 | 630 | static void |
6cf87ca4 | 631 | post_options (cpp_reader *pfile) |
96302433 NB |
632 | { |
633 | /* -Wtraditional is not useful in C++ mode. */ | |
634 | if (CPP_OPTION (pfile, cplusplus)) | |
635 | CPP_OPTION (pfile, warn_traditional) = 0; | |
636 | ||
6d4587f7 | 637 | /* Permanently disable macro expansion if we are rescanning |
43612ffb | 638 | preprocessed text. Read preprocesed source in ISO mode. */ |
6d4587f7 | 639 | if (CPP_OPTION (pfile, preprocessed)) |
43612ffb | 640 | { |
ccfc4c91 OW |
641 | if (!CPP_OPTION (pfile, directives_only)) |
642 | pfile->state.prevent_expansion = 1; | |
43612ffb NB |
643 | CPP_OPTION (pfile, traditional) = 0; |
644 | } | |
645 | ||
a8eb6044 NB |
646 | if (CPP_OPTION (pfile, warn_trigraphs) == 2) |
647 | CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs); | |
648 | ||
43612ffb | 649 | if (CPP_OPTION (pfile, traditional)) |
26aea073 | 650 | { |
a09d4744 NB |
651 | CPP_OPTION (pfile, cplusplus_comments) = 0; |
652 | ||
26aea073 NB |
653 | /* Traditional CPP does not accurately track column information. */ |
654 | CPP_OPTION (pfile, show_column) = 0; | |
655 | CPP_OPTION (pfile, trigraphs) = 0; | |
656 | CPP_OPTION (pfile, warn_trigraphs) = 0; | |
657 | } | |
7ca3d2b1 | 658 | } |