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5538ada6 | 1 | /* CPP Library. |
5e7b4e25 | 2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
148e4216 JM |
3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, |
4 | 2009 Free Software Foundation, Inc. | |
5538ada6 ZW |
5 | Contributed by Per Bothner, 1994-95. |
6 | Based on CCCP program by Paul Rubin, June 1986 | |
7 | Adapted to ANSI C, Richard Stallman, Jan 1987 | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU General Public License as published by the | |
11 | Free Software Foundation; either version 2, or (at your option) any | |
12 | later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
200031d1 | 21 | Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
5538ada6 | 22 | |
5538ada6 ZW |
23 | #include "config.h" |
24 | #include "system.h" | |
6de1e2a9 | 25 | #include "cpplib.h" |
4f4e53dd | 26 | #include "internal.h" |
49e6c08e | 27 | #include "mkdeps.h" |
018a4785 | 28 | #include "localedir.h" |
88ae23e7 | 29 | |
6cf87ca4 ZW |
30 | static void init_library (void); |
31 | static void mark_named_operators (cpp_reader *); | |
32 | static void read_original_filename (cpp_reader *); | |
b20d9f0c | 33 | static void read_original_directory (cpp_reader *); |
6cf87ca4 | 34 | static void post_options (cpp_reader *); |
6de1e2a9 | 35 | |
61d0346d NB |
36 | /* If we have designated initializers (GCC >2.7) these tables can be |
37 | initialized, constant data. Otherwise, they have to be filled in at | |
12cf91fe | 38 | runtime. */ |
61d0346d | 39 | #if HAVE_DESIGNATED_INITIALIZERS |
a9ae4483 | 40 | |
4a58aab6 | 41 | #define init_trigraph_map() /* Nothing. */ |
61d0346d | 42 | #define TRIGRAPH_MAP \ |
562a5c27 | 43 | __extension__ const uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { |
61d0346d | 44 | |
a9ae4483 | 45 | #define END }; |
455d2586 | 46 | #define s(p, v) [p] = v, |
61d0346d | 47 | |
a9ae4483 | 48 | #else |
61d0346d | 49 | |
562a5c27 | 50 | #define TRIGRAPH_MAP uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \ |
6cf87ca4 | 51 | static void init_trigraph_map (void) { \ |
61d0346d NB |
52 | unsigned char *x = _cpp_trigraph_map; |
53 | ||
ae79697b | 54 | #define END } |
455d2586 | 55 | #define s(p, v) x[p] = v; |
61d0346d | 56 | |
a9ae4483 | 57 | #endif |
6de1e2a9 | 58 | |
61d0346d NB |
59 | TRIGRAPH_MAP |
60 | s('=', '#') s(')', ']') s('!', '|') | |
61 | s('(', '[') s('\'', '^') s('>', '}') | |
62 | s('/', '\\') s('<', '{') s('-', '~') | |
63 | END | |
64 | ||
a9ae4483 | 65 | #undef s |
455d2586 | 66 | #undef END |
61d0346d | 67 | #undef TRIGRAPH_MAP |
6de1e2a9 | 68 | |
5d8ebbd8 NB |
69 | /* A set of booleans indicating what CPP features each source language |
70 | requires. */ | |
a01eb545 ZW |
71 | struct lang_flags |
72 | { | |
73 | char c99; | |
a01eb545 ZW |
74 | char cplusplus; |
75 | char extended_numbers; | |
af15a2fe | 76 | char extended_identifiers; |
58551c23 | 77 | char std; |
a01eb545 ZW |
78 | char cplusplus_comments; |
79 | char digraphs; | |
b6baa67d | 80 | char uliterals; |
a01eb545 ZW |
81 | }; |
82 | ||
a01eb545 | 83 | static const struct lang_flags lang_defaults[] = |
b6baa67d KVH |
84 | { /* c99 c++ xnum xid std // digr ulit */ |
85 | /* GNUC89 */ { 0, 0, 1, 0, 0, 1, 1, 0 }, | |
86 | /* GNUC99 */ { 1, 0, 1, 0, 0, 1, 1, 1 }, | |
87 | /* STDC89 */ { 0, 0, 0, 0, 1, 0, 0, 0 }, | |
88 | /* STDC94 */ { 0, 0, 0, 0, 1, 0, 1, 0 }, | |
89 | /* STDC99 */ { 1, 0, 1, 0, 1, 1, 1, 0 }, | |
90 | /* GNUCXX */ { 0, 1, 1, 0, 0, 1, 1, 0 }, | |
91 | /* CXX98 */ { 0, 1, 1, 0, 1, 1, 1, 0 }, | |
92 | /* GNUCXX0X */ { 1, 1, 1, 0, 0, 1, 1, 1 }, | |
93 | /* CXX0X */ { 1, 1, 1, 0, 1, 1, 1, 1 }, | |
94 | /* ASM */ { 0, 0, 1, 0, 0, 1, 0, 0 } | |
dfafdaa6 DG |
95 | /* xid should be 1 for GNUC99, STDC99, GNUCXX, CXX98, GNUCXX0X, and |
96 | CXX0X when no longer experimental (when all uses of identifiers | |
97 | in the compiler have been audited for correct handling of | |
98 | extended identifiers). */ | |
a01eb545 ZW |
99 | }; |
100 | ||
5d8ebbd8 | 101 | /* Sets internal flags correctly for a given language. */ |
f749a36b | 102 | void |
6cf87ca4 | 103 | cpp_set_lang (cpp_reader *pfile, enum c_lang lang) |
dd07b884 | 104 | { |
a01eb545 | 105 | const struct lang_flags *l = &lang_defaults[(int) lang]; |
df383483 | 106 | |
bdb05a7b | 107 | CPP_OPTION (pfile, lang) = lang; |
dd07b884 | 108 | |
af15a2fe JM |
109 | CPP_OPTION (pfile, c99) = l->c99; |
110 | CPP_OPTION (pfile, cplusplus) = l->cplusplus; | |
111 | CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; | |
112 | CPP_OPTION (pfile, extended_identifiers) = l->extended_identifiers; | |
113 | CPP_OPTION (pfile, std) = l->std; | |
114 | CPP_OPTION (pfile, trigraphs) = l->std; | |
115 | CPP_OPTION (pfile, cplusplus_comments) = l->cplusplus_comments; | |
116 | CPP_OPTION (pfile, digraphs) = l->digraphs; | |
b6baa67d | 117 | CPP_OPTION (pfile, uliterals) = l->uliterals; |
dd07b884 NB |
118 | } |
119 | ||
c1bad961 | 120 | /* Initialize library global state. */ |
cf44ea52 | 121 | static void |
6cf87ca4 | 122 | init_library (void) |
cf44ea52 | 123 | { |
7ca3d2b1 NB |
124 | static int initialized = 0; |
125 | ||
126 | if (! initialized) | |
127 | { | |
128 | initialized = 1; | |
129 | ||
7ca3d2b1 NB |
130 | /* Set up the trigraph map. This doesn't need to do anything if |
131 | we were compiled with a compiler that supports C99 designated | |
132 | initializers. */ | |
133 | init_trigraph_map (); | |
4f4e53dd PB |
134 | |
135 | #ifdef ENABLE_NLS | |
85eac2a0 | 136 | (void) bindtextdomain (PACKAGE, LOCALEDIR); |
4f4e53dd | 137 | #endif |
7ca3d2b1 | 138 | } |
cf44ea52 NB |
139 | } |
140 | ||
ec5c56db | 141 | /* Initialize a cpp_reader structure. */ |
cf44ea52 | 142 | cpp_reader * |
50f59cd7 PB |
143 | cpp_create_reader (enum c_lang lang, hash_table *table, |
144 | struct line_maps *line_table) | |
6de1e2a9 | 145 | { |
7ca3d2b1 | 146 | cpp_reader *pfile; |
93c80368 | 147 | |
4912a07c | 148 | /* Initialize this instance of the library if it hasn't been already. */ |
674c3b40 | 149 | init_library (); |
7ca3d2b1 | 150 | |
c3f829c1 | 151 | pfile = XCNEW (cpp_reader); |
93c80368 | 152 | |
f749a36b | 153 | cpp_set_lang (pfile, lang); |
a5a49440 | 154 | CPP_OPTION (pfile, warn_multichar) = 1; |
ae79697b | 155 | CPP_OPTION (pfile, discard_comments) = 1; |
477cdac7 | 156 | CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; |
ae79697b | 157 | CPP_OPTION (pfile, show_column) = 1; |
6ab3e7dd | 158 | CPP_OPTION (pfile, tabstop) = 8; |
be768055 | 159 | CPP_OPTION (pfile, operator_names) = 1; |
a8eb6044 | 160 | CPP_OPTION (pfile, warn_trigraphs) = 2; |
909de5da | 161 | CPP_OPTION (pfile, warn_endif_labels) = 1; |
9fbd3e41 | 162 | CPP_OPTION (pfile, warn_deprecated) = 1; |
f4ff5a69 | 163 | CPP_OPTION (pfile, warn_long_long) = !CPP_OPTION (pfile, c99); |
b1822ccc | 164 | CPP_OPTION (pfile, dollars_in_ident) = 1; |
78b8811a | 165 | CPP_OPTION (pfile, warn_dollars) = 1; |
e5b79219 | 166 | CPP_OPTION (pfile, warn_variadic_macros) = 1; |
c047ce93 | 167 | CPP_OPTION (pfile, warn_builtin_macro_redefined) = 1; |
50668cf6 | 168 | CPP_OPTION (pfile, warn_normalize) = normalized_C; |
ae79697b | 169 | |
2443d4e1 NB |
170 | /* Default CPP arithmetic to something sensible for the host for the |
171 | benefit of dumb users like fix-header. */ | |
c9220e3a | 172 | CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); |
2443d4e1 NB |
173 | CPP_OPTION (pfile, char_precision) = CHAR_BIT; |
174 | CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); | |
175 | CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); | |
2a1dc0d8 | 176 | CPP_OPTION (pfile, unsigned_char) = 0; |
44a147ad | 177 | CPP_OPTION (pfile, unsigned_wchar) = 1; |
e6cc3a24 ZW |
178 | CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */ |
179 | ||
180 | /* Default to no charset conversion. */ | |
16dd5cfe | 181 | CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding (); |
e6cc3a24 | 182 | CPP_OPTION (pfile, wide_charset) = 0; |
4268e8bb | 183 | |
16dd5cfe EC |
184 | /* Default the input character set to UTF-8. */ |
185 | CPP_OPTION (pfile, input_charset) = _cpp_default_encoding (); | |
cf551fba | 186 | |
8f9b4009 NB |
187 | /* A fake empty "directory" used as the starting point for files |
188 | looked up without a search path. Name cannot be '/' because we | |
189 | don't want to prepend anything at all to filenames using it. All | |
190 | other entries are correct zero-initialized. */ | |
191 | pfile->no_search_path.name = (char *) ""; | |
192 | ||
500bee0a | 193 | /* Initialize the line map. */ |
50f59cd7 | 194 | pfile->line_table = line_table; |
d82fc108 | 195 | |
4a58aab6 | 196 | /* Initialize lexer state. */ |
93c80368 NB |
197 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
198 | ||
4ed5bcfb | 199 | /* Set up static tokens. */ |
4ed5bcfb NB |
200 | pfile->avoid_paste.type = CPP_PADDING; |
201 | pfile->avoid_paste.val.source = NULL; | |
202 | pfile->eof.type = CPP_EOF; | |
203 | pfile->eof.flags = 0; | |
93c80368 | 204 | |
5fddcffc NB |
205 | /* Create a token buffer for the lexer. */ |
206 | _cpp_init_tokenrun (&pfile->base_run, 250); | |
207 | pfile->cur_run = &pfile->base_run; | |
208 | pfile->cur_token = pfile->base_run.base; | |
5fddcffc | 209 | |
4912a07c | 210 | /* Initialize the base context. */ |
93c80368 NB |
211 | pfile->context = &pfile->base_context; |
212 | pfile->base_context.macro = 0; | |
213 | pfile->base_context.prev = pfile->base_context.next = 0; | |
214 | ||
8c3b2693 NB |
215 | /* Aligned and unaligned storage. */ |
216 | pfile->a_buff = _cpp_get_buff (pfile, 0); | |
ece54d54 | 217 | pfile->u_buff = _cpp_get_buff (pfile, 0); |
93c80368 | 218 | |
87ed109f NB |
219 | /* The expression parser stack. */ |
220 | _cpp_expand_op_stack (pfile); | |
221 | ||
4912a07c | 222 | /* Initialize the buffer obstack. */ |
43839642 ZW |
223 | _obstack_begin (&pfile->buffer_ob, 0, 0, |
224 | (void *(*) (long)) xmalloc, | |
225 | (void (*) (void *)) free); | |
2a967f3d | 226 | |
8f9b4009 | 227 | _cpp_init_files (pfile); |
cf44ea52 | 228 | |
b4e46cea PB |
229 | _cpp_init_hashtable (pfile, table); |
230 | ||
cf44ea52 | 231 | return pfile; |
f2d5f0cc ZW |
232 | } |
233 | ||
5ffeb913 TT |
234 | /* Set the line_table entry in PFILE. This is called after reading a |
235 | PCH file, as the old line_table will be incorrect. */ | |
236 | void | |
237 | cpp_set_line_map (cpp_reader *pfile, struct line_maps *line_table) | |
238 | { | |
239 | pfile->line_table = line_table; | |
240 | } | |
241 | ||
400023a3 | 242 | /* Free resources used by PFILE. Accessing PFILE after this function |
8d9afc4e | 243 | returns leads to undefined behavior. Returns the error count. */ |
76c3e73e | 244 | void |
6cf87ca4 | 245 | cpp_destroy (cpp_reader *pfile) |
6de1e2a9 | 246 | { |
93c80368 | 247 | cpp_context *context, *contextn; |
50410426 | 248 | tokenrun *run, *runn; |
631d0d36 | 249 | int i; |
709e9e50 | 250 | |
87ed109f | 251 | free (pfile->op_stack); |
af0d16cd | 252 | |
38b24ee2 | 253 | while (CPP_BUFFER (pfile) != NULL) |
ef6e958a | 254 | _cpp_pop_buffer (pfile); |
6de1e2a9 | 255 | |
1a76916c NB |
256 | if (pfile->out.base) |
257 | free (pfile->out.base); | |
004cb263 | 258 | |
93c80368 | 259 | if (pfile->macro_buffer) |
4b49c365 | 260 | { |
fad205ff | 261 | free (pfile->macro_buffer); |
4b49c365 AO |
262 | pfile->macro_buffer = NULL; |
263 | pfile->macro_buffer_len = 0; | |
264 | } | |
93c80368 | 265 | |
f4ff5a69 NB |
266 | if (pfile->deps) |
267 | deps_free (pfile->deps); | |
2a967f3d | 268 | obstack_free (&pfile->buffer_ob, 0); |
49e6c08e | 269 | |
2a967f3d | 270 | _cpp_destroy_hashtable (pfile); |
8f9b4009 | 271 | _cpp_cleanup_files (pfile); |
e6cc3a24 | 272 | _cpp_destroy_iconv (pfile); |
709e9e50 | 273 | |
8c3b2693 | 274 | _cpp_free_buff (pfile->a_buff); |
ece54d54 | 275 | _cpp_free_buff (pfile->u_buff); |
b8af0ca5 | 276 | _cpp_free_buff (pfile->free_buffs); |
93c80368 | 277 | |
50410426 NB |
278 | for (run = &pfile->base_run; run; run = runn) |
279 | { | |
280 | runn = run->next; | |
281 | free (run->base); | |
282 | if (run != &pfile->base_run) | |
283 | free (run); | |
284 | } | |
285 | ||
93c80368 NB |
286 | for (context = pfile->base_context.next; context; context = contextn) |
287 | { | |
288 | contextn = context->next; | |
289 | free (context); | |
290 | } | |
400023a3 | 291 | |
631d0d36 MG |
292 | if (pfile->comments.entries) |
293 | { | |
294 | for (i = 0; i < pfile->comments.count; i++) | |
295 | free (pfile->comments.entries[i].comment); | |
296 | ||
297 | free (pfile->comments.entries); | |
298 | } | |
299 | ||
400023a3 | 300 | free (pfile); |
6de1e2a9 ZW |
301 | } |
302 | ||
93c80368 | 303 | /* This structure defines one built-in identifier. A node will be |
f24a153a ZW |
304 | entered in the hash table under the name NAME, with value VALUE. |
305 | ||
306 | There are two tables of these. builtin_array holds all the | |
307 | "builtin" macros: these are handled by builtin_macro() in | |
a2566ae9 | 308 | macro.c. Builtin is somewhat of a misnomer -- the property of |
f24a153a ZW |
309 | interest is that these macros require special code to compute their |
310 | expansions. The value is a "builtin_type" enumerator. | |
311 | ||
312 | operator_array holds the C++ named operators. These are keywords | |
313 | which act as aliases for punctuators. In C++, they cannot be | |
314 | altered through #define, and #if recognizes them as operators. In | |
315 | C, these are not entered into the hash table at all (but see | |
316 | <iso646.h>). The value is a token-type enumerator. */ | |
c047ce93 | 317 | struct builtin_macro |
a9ae4483 | 318 | { |
c047ce93 SB |
319 | const uchar *const name; |
320 | const unsigned short len; | |
321 | const unsigned short value; | |
322 | const bool always_warn_if_redefined; | |
a9ae4483 | 323 | }; |
93c80368 | 324 | |
c047ce93 SB |
325 | #define B(n, t, f) { DSC(n), t, f } |
326 | static const struct builtin_macro builtin_array[] = | |
6de1e2a9 | 327 | { |
c047ce93 SB |
328 | B("__TIMESTAMP__", BT_TIMESTAMP, false), |
329 | B("__TIME__", BT_TIME, false), | |
330 | B("__DATE__", BT_DATE, false), | |
331 | B("__FILE__", BT_FILE, false), | |
332 | B("__BASE_FILE__", BT_BASE_FILE, false), | |
333 | B("__LINE__", BT_SPECLINE, true), | |
334 | B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL, true), | |
335 | B("__COUNTER__", BT_COUNTER, true), | |
278c4662 NB |
336 | /* Keep builtins not used for -traditional-cpp at the end, and |
337 | update init_builtins() if any more are added. */ | |
c047ce93 SB |
338 | B("_Pragma", BT_PRAGMA, true), |
339 | B("__STDC__", BT_STDC, true), | |
340 | }; | |
341 | #undef B | |
342 | ||
343 | struct builtin_operator | |
344 | { | |
345 | const uchar *const name; | |
346 | const unsigned short len; | |
347 | const unsigned short value; | |
f24a153a | 348 | }; |
92936ecf | 349 | |
c047ce93 SB |
350 | #define B(n, t) { DSC(n), t } |
351 | static const struct builtin_operator operator_array[] = | |
f24a153a ZW |
352 | { |
353 | B("and", CPP_AND_AND), | |
354 | B("and_eq", CPP_AND_EQ), | |
355 | B("bitand", CPP_AND), | |
356 | B("bitor", CPP_OR), | |
357 | B("compl", CPP_COMPL), | |
358 | B("not", CPP_NOT), | |
359 | B("not_eq", CPP_NOT_EQ), | |
360 | B("or", CPP_OR_OR), | |
361 | B("or_eq", CPP_OR_EQ), | |
362 | B("xor", CPP_XOR), | |
363 | B("xor_eq", CPP_XOR_EQ) | |
a9ae4483 | 364 | }; |
12cf91fe | 365 | #undef B |
a9ae4483 | 366 | |
17645b15 NB |
367 | /* Mark the C++ named operators in the hash table. */ |
368 | static void | |
6cf87ca4 | 369 | mark_named_operators (cpp_reader *pfile) |
17645b15 | 370 | { |
c047ce93 | 371 | const struct builtin_operator *b; |
17645b15 NB |
372 | |
373 | for (b = operator_array; | |
374 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
375 | b++) | |
376 | { | |
377 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
378 | hp->flags |= NODE_OPERATOR; | |
4977bab6 ZW |
379 | hp->is_directive = 0; |
380 | hp->directive_index = b->value; | |
17645b15 NB |
381 | } |
382 | } | |
383 | ||
c1bad961 | 384 | void |
ccfc4c91 | 385 | cpp_init_special_builtins (cpp_reader *pfile) |
a9ae4483 | 386 | { |
c047ce93 | 387 | const struct builtin_macro *b; |
278c4662 | 388 | size_t n = ARRAY_SIZE (builtin_array); |
771c4df3 | 389 | |
278c4662 NB |
390 | if (CPP_OPTION (pfile, traditional)) |
391 | n -= 2; | |
83900997 JJ |
392 | else if (! CPP_OPTION (pfile, stdc_0_in_system_headers) |
393 | || CPP_OPTION (pfile, std)) | |
ccfc4c91 | 394 | n--; |
278c4662 | 395 | |
83900997 | 396 | for (b = builtin_array; b < builtin_array + n; b++) |
6de1e2a9 | 397 | { |
f24a153a ZW |
398 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
399 | hp->type = NT_MACRO; | |
c047ce93 SB |
400 | hp->flags |= NODE_BUILTIN; |
401 | if (b->always_warn_if_redefined | |
402 | || CPP_OPTION (pfile, warn_builtin_macro_redefined)) | |
403 | hp->flags |= NODE_WARN; | |
c3f829c1 | 404 | hp->value.builtin = (enum builtin_type) b->value; |
6de1e2a9 | 405 | } |
ccfc4c91 OW |
406 | } |
407 | ||
408 | /* Read the builtins table above and enter them, and language-specific | |
409 | macros, into the hash table. HOSTED is true if this is a hosted | |
410 | environment. */ | |
411 | void | |
412 | cpp_init_builtins (cpp_reader *pfile, int hosted) | |
413 | { | |
414 | cpp_init_special_builtins (pfile); | |
415 | ||
416 | if (!CPP_OPTION (pfile, traditional) | |
417 | && (! CPP_OPTION (pfile, stdc_0_in_system_headers) | |
418 | || CPP_OPTION (pfile, std))) | |
419 | _cpp_define_builtin (pfile, "__STDC__ 1"); | |
c740cee2 NB |
420 | |
421 | if (CPP_OPTION (pfile, cplusplus)) | |
3d90d290 | 422 | _cpp_define_builtin (pfile, "__cplusplus 1"); |
2a1dc0d8 ZW |
423 | else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
424 | _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); | |
0f7866e7 | 425 | else if (CPP_OPTION (pfile, lang) == CLK_STDC94) |
c740cee2 NB |
426 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); |
427 | else if (CPP_OPTION (pfile, c99)) | |
428 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); | |
429 | ||
6e270179 | 430 | if (hosted) |
58b5b894 | 431 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1"); |
6e270179 | 432 | else |
58b5b894 | 433 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0"); |
6e270179 | 434 | |
0f7866e7 ZL |
435 | if (CPP_OPTION (pfile, objc)) |
436 | _cpp_define_builtin (pfile, "__OBJC__ 1"); | |
4a58aab6 NB |
437 | } |
438 | ||
2443d4e1 NB |
439 | /* Sanity-checks are dependent on command-line options, so it is |
440 | called as a subroutine of cpp_read_main_file (). */ | |
441 | #if ENABLE_CHECKING | |
6cf87ca4 ZW |
442 | static void sanity_checks (cpp_reader *); |
443 | static void sanity_checks (cpp_reader *pfile) | |
2443d4e1 NB |
444 | { |
445 | cppchar_t test = 0; | |
c9220e3a | 446 | size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); |
2443d4e1 NB |
447 | |
448 | /* Sanity checks for assumptions about CPP arithmetic and target | |
449 | type precisions made by cpplib. */ | |
450 | test--; | |
451 | if (test < 1) | |
0527bc4e | 452 | cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type"); |
2443d4e1 | 453 | |
c9220e3a | 454 | if (CPP_OPTION (pfile, precision) > max_precision) |
0527bc4e | 455 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
456 | "preprocessor arithmetic has maximum precision of %lu bits;" |
457 | " target requires %lu bits", | |
c9220e3a NB |
458 | (unsigned long) max_precision, |
459 | (unsigned long) CPP_OPTION (pfile, precision)); | |
2443d4e1 NB |
460 | |
461 | if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) | |
0527bc4e | 462 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
463 | "CPP arithmetic must be at least as precise as a target int"); |
464 | ||
465 | if (CPP_OPTION (pfile, char_precision) < 8) | |
0527bc4e | 466 | cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide"); |
2443d4e1 NB |
467 | |
468 | if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 469 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
470 | "target wchar_t is narrower than target char"); |
471 | ||
472 | if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 473 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
474 | "target int is narrower than target char"); |
475 | ||
c9220e3a NB |
476 | /* This is assumed in eval_token() and could be fixed if necessary. */ |
477 | if (sizeof (cppchar_t) > sizeof (cpp_num_part)) | |
0527bc4e JDA |
478 | cpp_error (pfile, CPP_DL_ICE, |
479 | "CPP half-integer narrower than CPP character"); | |
c9220e3a | 480 | |
2443d4e1 | 481 | if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) |
0527bc4e | 482 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
483 | "CPP on this host cannot handle wide character constants over" |
484 | " %lu bits, but the target requires %lu bits", | |
c9220e3a NB |
485 | (unsigned long) BITS_PER_CPPCHAR_T, |
486 | (unsigned long) CPP_OPTION (pfile, wchar_precision)); | |
2443d4e1 NB |
487 | } |
488 | #else | |
489 | # define sanity_checks(PFILE) | |
490 | #endif | |
491 | ||
f5e99456 | 492 | /* This is called after options have been parsed, and partially |
59e4e217 | 493 | processed. */ |
4169c321 PB |
494 | void |
495 | cpp_post_options (cpp_reader *pfile) | |
6de1e2a9 | 496 | { |
2443d4e1 NB |
497 | sanity_checks (pfile); |
498 | ||
f4ff5a69 NB |
499 | post_options (pfile); |
500 | ||
c19b12cb NB |
501 | /* Mark named operators before handling command line macros. */ |
502 | if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) | |
503 | mark_named_operators (pfile); | |
4169c321 | 504 | } |
c19b12cb | 505 | |
4dc299fb | 506 | /* Setup for processing input from the file named FNAME, or stdin if |
8e9ea4d7 PB |
507 | it is the empty string. Return the original filename |
508 | on success (e.g. foo.i->foo.c), or NULL on failure. */ | |
509 | const char * | |
510 | cpp_read_main_file (cpp_reader *pfile, const char *fname) | |
4169c321 | 511 | { |
f4ff5a69 NB |
512 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
513 | { | |
514 | if (!pfile->deps) | |
515 | pfile->deps = deps_init (); | |
516 | ||
517 | /* Set the default target (if there is none already). */ | |
518 | deps_add_default_target (pfile->deps, fname); | |
519 | } | |
96302433 | 520 | |
4dc299fb | 521 | pfile->main_file |
6568f34b | 522 | = _cpp_find_file (pfile, fname, &pfile->no_search_path, false, 0); |
4dc299fb | 523 | if (_cpp_find_failed (pfile->main_file)) |
3092d0fc | 524 | return NULL; |
f5e99456 | 525 | |
4dc299fb PB |
526 | _cpp_stack_file (pfile, pfile->main_file, false); |
527 | ||
528 | /* For foo.i, read the original filename foo.c now, for the benefit | |
529 | of the front ends. */ | |
530 | if (CPP_OPTION (pfile, preprocessed)) | |
8e9ea4d7 PB |
531 | { |
532 | read_original_filename (pfile); | |
12f9df4e | 533 | fname = pfile->line_table->maps[pfile->line_table->used-1].to_file; |
8e9ea4d7 PB |
534 | } |
535 | return fname; | |
f5e99456 NB |
536 | } |
537 | ||
538 | /* For preprocessed files, if the first tokens are of the form # NUM. | |
539 | handle the directive so we know the original file name. This will | |
540 | generate file_change callbacks, which the front ends must handle | |
541 | appropriately given their state of initialization. */ | |
542 | static void | |
6cf87ca4 | 543 | read_original_filename (cpp_reader *pfile) |
f5e99456 NB |
544 | { |
545 | const cpp_token *token, *token1; | |
546 | ||
547 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
548 | process the directive, otherwise back up. */ | |
549 | token = _cpp_lex_direct (pfile); | |
550 | if (token->type == CPP_HASH) | |
551 | { | |
456b8ce5 | 552 | pfile->state.in_directive = 1; |
f5e99456 NB |
553 | token1 = _cpp_lex_direct (pfile); |
554 | _cpp_backup_tokens (pfile, 1); | |
456b8ce5 | 555 | pfile->state.in_directive = 0; |
f5e99456 NB |
556 | |
557 | /* If it's a #line directive, handle it. */ | |
558 | if (token1->type == CPP_NUMBER) | |
559 | { | |
560 | _cpp_handle_directive (pfile, token->flags & PREV_WHITE); | |
b20d9f0c | 561 | read_original_directory (pfile); |
f5e99456 NB |
562 | return; |
563 | } | |
564 | } | |
565 | ||
566 | /* Backup as if nothing happened. */ | |
567 | _cpp_backup_tokens (pfile, 1); | |
568 | } | |
569 | ||
b20d9f0c AO |
570 | /* For preprocessed files, if the tokens following the first filename |
571 | line is of the form # <line> "/path/name//", handle the | |
572 | directive so we know the original current directory. */ | |
573 | static void | |
574 | read_original_directory (cpp_reader *pfile) | |
575 | { | |
576 | const cpp_token *hash, *token; | |
577 | ||
578 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
579 | process the directive, otherwise back up. */ | |
580 | hash = _cpp_lex_direct (pfile); | |
581 | if (hash->type != CPP_HASH) | |
582 | { | |
583 | _cpp_backup_tokens (pfile, 1); | |
584 | return; | |
585 | } | |
586 | ||
587 | token = _cpp_lex_direct (pfile); | |
588 | ||
589 | if (token->type != CPP_NUMBER) | |
590 | { | |
591 | _cpp_backup_tokens (pfile, 2); | |
592 | return; | |
593 | } | |
594 | ||
595 | token = _cpp_lex_direct (pfile); | |
596 | ||
597 | if (token->type != CPP_STRING | |
598 | || ! (token->val.str.len >= 5 | |
599 | && token->val.str.text[token->val.str.len-2] == '/' | |
600 | && token->val.str.text[token->val.str.len-3] == '/')) | |
601 | { | |
602 | _cpp_backup_tokens (pfile, 3); | |
603 | return; | |
604 | } | |
605 | ||
606 | if (pfile->cb.dir_change) | |
607 | { | |
c3f829c1 | 608 | char *debugdir = (char *) alloca (token->val.str.len - 3); |
b20d9f0c AO |
609 | |
610 | memcpy (debugdir, (const char *) token->val.str.text + 1, | |
611 | token->val.str.len - 4); | |
612 | debugdir[token->val.str.len - 4] = '\0'; | |
613 | ||
614 | pfile->cb.dir_change (pfile, debugdir); | |
8e9ea4d7 | 615 | } |
b20d9f0c AO |
616 | } |
617 | ||
76c3e73e | 618 | /* This is called at the end of preprocessing. It pops the last |
148e4216 | 619 | buffer and writes dependency output. |
16dd5cfe | 620 | |
76c3e73e NB |
621 | Maybe it should also reset state, such that you could call |
622 | cpp_start_read with a new filename to restart processing. */ | |
148e4216 | 623 | void |
6cf87ca4 | 624 | cpp_finish (cpp_reader *pfile, FILE *deps_stream) |
6de1e2a9 | 625 | { |
a69cbaac NB |
626 | /* Warn about unused macros before popping the final buffer. */ |
627 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
628 | cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); | |
629 | ||
a2566ae9 | 630 | /* lex.c leaves the final buffer on the stack. This it so that |
7364fdd8 | 631 | it returns an unending stream of CPP_EOFs to the client. If we |
a1f300c0 | 632 | popped the buffer, we'd dereference a NULL buffer pointer and |
7364fdd8 NB |
633 | segfault. It's nice to allow the client to do worry-free excess |
634 | cpp_get_token calls. */ | |
635 | while (pfile->buffer) | |
636 | _cpp_pop_buffer (pfile); | |
c1212d2f | 637 | |
f4ff5a69 | 638 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE |
148e4216 | 639 | && deps_stream) |
76c3e73e NB |
640 | { |
641 | deps_write (pfile->deps, deps_stream, 72); | |
642 | ||
f4ff5a69 | 643 | if (CPP_OPTION (pfile, deps.phony_targets)) |
76c3e73e NB |
644 | deps_phony_targets (pfile->deps, deps_stream); |
645 | } | |
3caee4a8 | 646 | |
d4506961 ZW |
647 | /* Report on headers that could use multiple include guards. */ |
648 | if (CPP_OPTION (pfile, print_include_names)) | |
c71f835b | 649 | _cpp_report_missing_guards (pfile); |
6de1e2a9 ZW |
650 | } |
651 | ||
f4ff5a69 | 652 | static void |
6cf87ca4 | 653 | post_options (cpp_reader *pfile) |
96302433 NB |
654 | { |
655 | /* -Wtraditional is not useful in C++ mode. */ | |
656 | if (CPP_OPTION (pfile, cplusplus)) | |
657 | CPP_OPTION (pfile, warn_traditional) = 0; | |
658 | ||
6d4587f7 | 659 | /* Permanently disable macro expansion if we are rescanning |
43612ffb | 660 | preprocessed text. Read preprocesed source in ISO mode. */ |
6d4587f7 | 661 | if (CPP_OPTION (pfile, preprocessed)) |
43612ffb | 662 | { |
ccfc4c91 OW |
663 | if (!CPP_OPTION (pfile, directives_only)) |
664 | pfile->state.prevent_expansion = 1; | |
43612ffb NB |
665 | CPP_OPTION (pfile, traditional) = 0; |
666 | } | |
667 | ||
a8eb6044 NB |
668 | if (CPP_OPTION (pfile, warn_trigraphs) == 2) |
669 | CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs); | |
670 | ||
43612ffb | 671 | if (CPP_OPTION (pfile, traditional)) |
26aea073 | 672 | { |
a09d4744 NB |
673 | CPP_OPTION (pfile, cplusplus_comments) = 0; |
674 | ||
26aea073 NB |
675 | /* Traditional CPP does not accurately track column information. */ |
676 | CPP_OPTION (pfile, show_column) = 0; | |
677 | CPP_OPTION (pfile, trigraphs) = 0; | |
678 | CPP_OPTION (pfile, warn_trigraphs) = 0; | |
679 | } | |
7ca3d2b1 | 680 | } |