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5538ada6 | 1 | /* CPP Library. |
5e7b4e25 | 2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
148e4216 | 3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, |
709d7160 | 4 | 2009, 2010 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 | |
748086b7 | 11 | Free Software Foundation; either version 3, or (at your option) any |
5538ada6 ZW |
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 | |
748086b7 JJ |
20 | along with this program; see the file COPYING3. If not see |
21 | <http://www.gnu.org/licenses/>. */ | |
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 | 30 | static void init_library (void); |
3d8b2a98 | 31 | static void mark_named_operators (cpp_reader *, int); |
6cf87ca4 | 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; |
9c650d90 | 163 | CPP_OPTION (pfile, warn_long_long) = 0; |
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 | |
17e7cb85 KT |
219 | /* Initialize table for push_macro/pop_macro. */ |
220 | pfile->pushed_macros = 0; | |
221 | ||
87ed109f NB |
222 | /* The expression parser stack. */ |
223 | _cpp_expand_op_stack (pfile); | |
224 | ||
4912a07c | 225 | /* Initialize the buffer obstack. */ |
43839642 ZW |
226 | _obstack_begin (&pfile->buffer_ob, 0, 0, |
227 | (void *(*) (long)) xmalloc, | |
228 | (void (*) (void *)) free); | |
2a967f3d | 229 | |
8f9b4009 | 230 | _cpp_init_files (pfile); |
cf44ea52 | 231 | |
b4e46cea PB |
232 | _cpp_init_hashtable (pfile, table); |
233 | ||
cf44ea52 | 234 | return pfile; |
f2d5f0cc ZW |
235 | } |
236 | ||
5ffeb913 TT |
237 | /* Set the line_table entry in PFILE. This is called after reading a |
238 | PCH file, as the old line_table will be incorrect. */ | |
239 | void | |
240 | cpp_set_line_map (cpp_reader *pfile, struct line_maps *line_table) | |
241 | { | |
242 | pfile->line_table = line_table; | |
243 | } | |
244 | ||
400023a3 | 245 | /* Free resources used by PFILE. Accessing PFILE after this function |
8d9afc4e | 246 | returns leads to undefined behavior. Returns the error count. */ |
76c3e73e | 247 | void |
6cf87ca4 | 248 | cpp_destroy (cpp_reader *pfile) |
6de1e2a9 | 249 | { |
93c80368 | 250 | cpp_context *context, *contextn; |
17e7cb85 | 251 | struct def_pragma_macro *pmacro; |
50410426 | 252 | tokenrun *run, *runn; |
631d0d36 | 253 | int i; |
709e9e50 | 254 | |
87ed109f | 255 | free (pfile->op_stack); |
af0d16cd | 256 | |
38b24ee2 | 257 | while (CPP_BUFFER (pfile) != NULL) |
ef6e958a | 258 | _cpp_pop_buffer (pfile); |
6de1e2a9 | 259 | |
1a76916c NB |
260 | if (pfile->out.base) |
261 | free (pfile->out.base); | |
004cb263 | 262 | |
93c80368 | 263 | if (pfile->macro_buffer) |
4b49c365 | 264 | { |
fad205ff | 265 | free (pfile->macro_buffer); |
4b49c365 AO |
266 | pfile->macro_buffer = NULL; |
267 | pfile->macro_buffer_len = 0; | |
268 | } | |
93c80368 | 269 | |
f4ff5a69 NB |
270 | if (pfile->deps) |
271 | deps_free (pfile->deps); | |
2a967f3d | 272 | obstack_free (&pfile->buffer_ob, 0); |
49e6c08e | 273 | |
2a967f3d | 274 | _cpp_destroy_hashtable (pfile); |
8f9b4009 | 275 | _cpp_cleanup_files (pfile); |
e6cc3a24 | 276 | _cpp_destroy_iconv (pfile); |
709e9e50 | 277 | |
8c3b2693 | 278 | _cpp_free_buff (pfile->a_buff); |
ece54d54 | 279 | _cpp_free_buff (pfile->u_buff); |
b8af0ca5 | 280 | _cpp_free_buff (pfile->free_buffs); |
93c80368 | 281 | |
50410426 NB |
282 | for (run = &pfile->base_run; run; run = runn) |
283 | { | |
284 | runn = run->next; | |
285 | free (run->base); | |
286 | if (run != &pfile->base_run) | |
287 | free (run); | |
288 | } | |
289 | ||
93c80368 NB |
290 | for (context = pfile->base_context.next; context; context = contextn) |
291 | { | |
292 | contextn = context->next; | |
293 | free (context); | |
294 | } | |
400023a3 | 295 | |
631d0d36 MG |
296 | if (pfile->comments.entries) |
297 | { | |
298 | for (i = 0; i < pfile->comments.count; i++) | |
299 | free (pfile->comments.entries[i].comment); | |
300 | ||
301 | free (pfile->comments.entries); | |
302 | } | |
17e7cb85 KT |
303 | if (pfile->pushed_macros) |
304 | { | |
305 | do | |
306 | { | |
307 | pmacro = pfile->pushed_macros; | |
308 | pfile->pushed_macros = pmacro->next; | |
309 | free (pmacro->name); | |
310 | free (pmacro); | |
311 | } | |
312 | while (pfile->pushed_macros); | |
313 | } | |
631d0d36 | 314 | |
400023a3 | 315 | free (pfile); |
6de1e2a9 ZW |
316 | } |
317 | ||
93c80368 | 318 | /* This structure defines one built-in identifier. A node will be |
f24a153a ZW |
319 | entered in the hash table under the name NAME, with value VALUE. |
320 | ||
321 | There are two tables of these. builtin_array holds all the | |
322 | "builtin" macros: these are handled by builtin_macro() in | |
a2566ae9 | 323 | macro.c. Builtin is somewhat of a misnomer -- the property of |
f24a153a ZW |
324 | interest is that these macros require special code to compute their |
325 | expansions. The value is a "builtin_type" enumerator. | |
326 | ||
327 | operator_array holds the C++ named operators. These are keywords | |
328 | which act as aliases for punctuators. In C++, they cannot be | |
329 | altered through #define, and #if recognizes them as operators. In | |
330 | C, these are not entered into the hash table at all (but see | |
331 | <iso646.h>). The value is a token-type enumerator. */ | |
c047ce93 | 332 | struct builtin_macro |
a9ae4483 | 333 | { |
c047ce93 SB |
334 | const uchar *const name; |
335 | const unsigned short len; | |
336 | const unsigned short value; | |
337 | const bool always_warn_if_redefined; | |
a9ae4483 | 338 | }; |
93c80368 | 339 | |
c047ce93 SB |
340 | #define B(n, t, f) { DSC(n), t, f } |
341 | static const struct builtin_macro builtin_array[] = | |
6de1e2a9 | 342 | { |
c047ce93 SB |
343 | B("__TIMESTAMP__", BT_TIMESTAMP, false), |
344 | B("__TIME__", BT_TIME, false), | |
345 | B("__DATE__", BT_DATE, false), | |
346 | B("__FILE__", BT_FILE, false), | |
347 | B("__BASE_FILE__", BT_BASE_FILE, false), | |
348 | B("__LINE__", BT_SPECLINE, true), | |
349 | B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL, true), | |
350 | B("__COUNTER__", BT_COUNTER, true), | |
278c4662 NB |
351 | /* Keep builtins not used for -traditional-cpp at the end, and |
352 | update init_builtins() if any more are added. */ | |
c047ce93 SB |
353 | B("_Pragma", BT_PRAGMA, true), |
354 | B("__STDC__", BT_STDC, true), | |
355 | }; | |
356 | #undef B | |
357 | ||
358 | struct builtin_operator | |
359 | { | |
360 | const uchar *const name; | |
361 | const unsigned short len; | |
362 | const unsigned short value; | |
f24a153a | 363 | }; |
92936ecf | 364 | |
c047ce93 SB |
365 | #define B(n, t) { DSC(n), t } |
366 | static const struct builtin_operator operator_array[] = | |
f24a153a ZW |
367 | { |
368 | B("and", CPP_AND_AND), | |
369 | B("and_eq", CPP_AND_EQ), | |
370 | B("bitand", CPP_AND), | |
371 | B("bitor", CPP_OR), | |
372 | B("compl", CPP_COMPL), | |
373 | B("not", CPP_NOT), | |
374 | B("not_eq", CPP_NOT_EQ), | |
375 | B("or", CPP_OR_OR), | |
376 | B("or_eq", CPP_OR_EQ), | |
377 | B("xor", CPP_XOR), | |
378 | B("xor_eq", CPP_XOR_EQ) | |
a9ae4483 | 379 | }; |
12cf91fe | 380 | #undef B |
a9ae4483 | 381 | |
17645b15 NB |
382 | /* Mark the C++ named operators in the hash table. */ |
383 | static void | |
3d8b2a98 | 384 | mark_named_operators (cpp_reader *pfile, int flags) |
17645b15 | 385 | { |
c047ce93 | 386 | const struct builtin_operator *b; |
17645b15 NB |
387 | |
388 | for (b = operator_array; | |
389 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
390 | b++) | |
391 | { | |
392 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
3d8b2a98 | 393 | hp->flags |= flags; |
4977bab6 ZW |
394 | hp->is_directive = 0; |
395 | hp->directive_index = b->value; | |
17645b15 NB |
396 | } |
397 | } | |
398 | ||
cfc93532 MLI |
399 | /* Helper function of cpp_type2name. Return the string associated with |
400 | named operator TYPE. */ | |
401 | const char * | |
402 | cpp_named_operator2name (enum cpp_ttype type) | |
403 | { | |
404 | const struct builtin_operator *b; | |
405 | ||
406 | for (b = operator_array; | |
407 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
408 | b++) | |
409 | { | |
410 | if (type == b->value) | |
411 | return (const char *) b->name; | |
412 | } | |
413 | ||
414 | return NULL; | |
415 | } | |
416 | ||
c1bad961 | 417 | void |
ccfc4c91 | 418 | cpp_init_special_builtins (cpp_reader *pfile) |
a9ae4483 | 419 | { |
c047ce93 | 420 | const struct builtin_macro *b; |
278c4662 | 421 | size_t n = ARRAY_SIZE (builtin_array); |
771c4df3 | 422 | |
278c4662 NB |
423 | if (CPP_OPTION (pfile, traditional)) |
424 | n -= 2; | |
83900997 JJ |
425 | else if (! CPP_OPTION (pfile, stdc_0_in_system_headers) |
426 | || CPP_OPTION (pfile, std)) | |
ccfc4c91 | 427 | n--; |
278c4662 | 428 | |
83900997 | 429 | for (b = builtin_array; b < builtin_array + n; b++) |
6de1e2a9 | 430 | { |
f24a153a ZW |
431 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
432 | hp->type = NT_MACRO; | |
c047ce93 SB |
433 | hp->flags |= NODE_BUILTIN; |
434 | if (b->always_warn_if_redefined | |
435 | || CPP_OPTION (pfile, warn_builtin_macro_redefined)) | |
436 | hp->flags |= NODE_WARN; | |
7e5487a2 | 437 | hp->value.builtin = (enum cpp_builtin_type) b->value; |
6de1e2a9 | 438 | } |
ccfc4c91 OW |
439 | } |
440 | ||
441 | /* Read the builtins table above and enter them, and language-specific | |
442 | macros, into the hash table. HOSTED is true if this is a hosted | |
443 | environment. */ | |
444 | void | |
445 | cpp_init_builtins (cpp_reader *pfile, int hosted) | |
446 | { | |
447 | cpp_init_special_builtins (pfile); | |
448 | ||
449 | if (!CPP_OPTION (pfile, traditional) | |
450 | && (! CPP_OPTION (pfile, stdc_0_in_system_headers) | |
451 | || CPP_OPTION (pfile, std))) | |
452 | _cpp_define_builtin (pfile, "__STDC__ 1"); | |
c740cee2 NB |
453 | |
454 | if (CPP_OPTION (pfile, cplusplus)) | |
3d90d290 | 455 | _cpp_define_builtin (pfile, "__cplusplus 1"); |
2a1dc0d8 ZW |
456 | else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
457 | _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); | |
0f7866e7 | 458 | else if (CPP_OPTION (pfile, lang) == CLK_STDC94) |
c740cee2 NB |
459 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); |
460 | else if (CPP_OPTION (pfile, c99)) | |
461 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); | |
462 | ||
6e270179 | 463 | if (hosted) |
58b5b894 | 464 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1"); |
6e270179 | 465 | else |
58b5b894 | 466 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0"); |
6e270179 | 467 | |
0f7866e7 ZL |
468 | if (CPP_OPTION (pfile, objc)) |
469 | _cpp_define_builtin (pfile, "__OBJC__ 1"); | |
4a58aab6 NB |
470 | } |
471 | ||
2443d4e1 NB |
472 | /* Sanity-checks are dependent on command-line options, so it is |
473 | called as a subroutine of cpp_read_main_file (). */ | |
474 | #if ENABLE_CHECKING | |
6cf87ca4 ZW |
475 | static void sanity_checks (cpp_reader *); |
476 | static void sanity_checks (cpp_reader *pfile) | |
2443d4e1 NB |
477 | { |
478 | cppchar_t test = 0; | |
c9220e3a | 479 | size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); |
2443d4e1 NB |
480 | |
481 | /* Sanity checks for assumptions about CPP arithmetic and target | |
482 | type precisions made by cpplib. */ | |
483 | test--; | |
484 | if (test < 1) | |
0527bc4e | 485 | cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type"); |
2443d4e1 | 486 | |
c9220e3a | 487 | if (CPP_OPTION (pfile, precision) > max_precision) |
0527bc4e | 488 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
489 | "preprocessor arithmetic has maximum precision of %lu bits;" |
490 | " target requires %lu bits", | |
c9220e3a NB |
491 | (unsigned long) max_precision, |
492 | (unsigned long) CPP_OPTION (pfile, precision)); | |
2443d4e1 NB |
493 | |
494 | if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) | |
0527bc4e | 495 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
496 | "CPP arithmetic must be at least as precise as a target int"); |
497 | ||
498 | if (CPP_OPTION (pfile, char_precision) < 8) | |
0527bc4e | 499 | cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide"); |
2443d4e1 NB |
500 | |
501 | if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 502 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
503 | "target wchar_t is narrower than target char"); |
504 | ||
505 | if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 506 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
507 | "target int is narrower than target char"); |
508 | ||
c9220e3a NB |
509 | /* This is assumed in eval_token() and could be fixed if necessary. */ |
510 | if (sizeof (cppchar_t) > sizeof (cpp_num_part)) | |
0527bc4e JDA |
511 | cpp_error (pfile, CPP_DL_ICE, |
512 | "CPP half-integer narrower than CPP character"); | |
c9220e3a | 513 | |
2443d4e1 | 514 | if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) |
0527bc4e | 515 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
516 | "CPP on this host cannot handle wide character constants over" |
517 | " %lu bits, but the target requires %lu bits", | |
c9220e3a NB |
518 | (unsigned long) BITS_PER_CPPCHAR_T, |
519 | (unsigned long) CPP_OPTION (pfile, wchar_precision)); | |
2443d4e1 NB |
520 | } |
521 | #else | |
522 | # define sanity_checks(PFILE) | |
523 | #endif | |
524 | ||
f5e99456 | 525 | /* This is called after options have been parsed, and partially |
59e4e217 | 526 | processed. */ |
4169c321 PB |
527 | void |
528 | cpp_post_options (cpp_reader *pfile) | |
6de1e2a9 | 529 | { |
3d8b2a98 ILT |
530 | int flags; |
531 | ||
2443d4e1 NB |
532 | sanity_checks (pfile); |
533 | ||
f4ff5a69 NB |
534 | post_options (pfile); |
535 | ||
c19b12cb | 536 | /* Mark named operators before handling command line macros. */ |
3d8b2a98 | 537 | flags = 0; |
c19b12cb | 538 | if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) |
3d8b2a98 ILT |
539 | flags |= NODE_OPERATOR; |
540 | if (CPP_OPTION (pfile, warn_cxx_operator_names)) | |
541 | flags |= NODE_DIAGNOSTIC | NODE_WARN_OPERATOR; | |
542 | if (flags != 0) | |
543 | mark_named_operators (pfile, flags); | |
4169c321 | 544 | } |
c19b12cb | 545 | |
4dc299fb | 546 | /* Setup for processing input from the file named FNAME, or stdin if |
8e9ea4d7 PB |
547 | it is the empty string. Return the original filename |
548 | on success (e.g. foo.i->foo.c), or NULL on failure. */ | |
549 | const char * | |
550 | cpp_read_main_file (cpp_reader *pfile, const char *fname) | |
4169c321 | 551 | { |
f4ff5a69 NB |
552 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
553 | { | |
554 | if (!pfile->deps) | |
555 | pfile->deps = deps_init (); | |
556 | ||
557 | /* Set the default target (if there is none already). */ | |
558 | deps_add_default_target (pfile->deps, fname); | |
559 | } | |
96302433 | 560 | |
4dc299fb | 561 | pfile->main_file |
6568f34b | 562 | = _cpp_find_file (pfile, fname, &pfile->no_search_path, false, 0); |
4dc299fb | 563 | if (_cpp_find_failed (pfile->main_file)) |
3092d0fc | 564 | return NULL; |
f5e99456 | 565 | |
4dc299fb PB |
566 | _cpp_stack_file (pfile, pfile->main_file, false); |
567 | ||
568 | /* For foo.i, read the original filename foo.c now, for the benefit | |
569 | of the front ends. */ | |
570 | if (CPP_OPTION (pfile, preprocessed)) | |
8e9ea4d7 PB |
571 | { |
572 | read_original_filename (pfile); | |
12f9df4e | 573 | fname = pfile->line_table->maps[pfile->line_table->used-1].to_file; |
8e9ea4d7 PB |
574 | } |
575 | return fname; | |
f5e99456 NB |
576 | } |
577 | ||
578 | /* For preprocessed files, if the first tokens are of the form # NUM. | |
579 | handle the directive so we know the original file name. This will | |
580 | generate file_change callbacks, which the front ends must handle | |
581 | appropriately given their state of initialization. */ | |
582 | static void | |
6cf87ca4 | 583 | read_original_filename (cpp_reader *pfile) |
f5e99456 NB |
584 | { |
585 | const cpp_token *token, *token1; | |
586 | ||
587 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
588 | process the directive, otherwise back up. */ | |
589 | token = _cpp_lex_direct (pfile); | |
590 | if (token->type == CPP_HASH) | |
591 | { | |
456b8ce5 | 592 | pfile->state.in_directive = 1; |
f5e99456 NB |
593 | token1 = _cpp_lex_direct (pfile); |
594 | _cpp_backup_tokens (pfile, 1); | |
456b8ce5 | 595 | pfile->state.in_directive = 0; |
f5e99456 NB |
596 | |
597 | /* If it's a #line directive, handle it. */ | |
709d7160 JJ |
598 | if (token1->type == CPP_NUMBER |
599 | && _cpp_handle_directive (pfile, token->flags & PREV_WHITE)) | |
f5e99456 | 600 | { |
b20d9f0c | 601 | read_original_directory (pfile); |
f5e99456 NB |
602 | return; |
603 | } | |
604 | } | |
605 | ||
606 | /* Backup as if nothing happened. */ | |
607 | _cpp_backup_tokens (pfile, 1); | |
608 | } | |
609 | ||
b20d9f0c AO |
610 | /* For preprocessed files, if the tokens following the first filename |
611 | line is of the form # <line> "/path/name//", handle the | |
612 | directive so we know the original current directory. */ | |
613 | static void | |
614 | read_original_directory (cpp_reader *pfile) | |
615 | { | |
616 | const cpp_token *hash, *token; | |
617 | ||
618 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
619 | process the directive, otherwise back up. */ | |
620 | hash = _cpp_lex_direct (pfile); | |
621 | if (hash->type != CPP_HASH) | |
622 | { | |
623 | _cpp_backup_tokens (pfile, 1); | |
624 | return; | |
625 | } | |
626 | ||
627 | token = _cpp_lex_direct (pfile); | |
628 | ||
629 | if (token->type != CPP_NUMBER) | |
630 | { | |
631 | _cpp_backup_tokens (pfile, 2); | |
632 | return; | |
633 | } | |
634 | ||
635 | token = _cpp_lex_direct (pfile); | |
636 | ||
637 | if (token->type != CPP_STRING | |
638 | || ! (token->val.str.len >= 5 | |
639 | && token->val.str.text[token->val.str.len-2] == '/' | |
640 | && token->val.str.text[token->val.str.len-3] == '/')) | |
641 | { | |
642 | _cpp_backup_tokens (pfile, 3); | |
643 | return; | |
644 | } | |
645 | ||
646 | if (pfile->cb.dir_change) | |
647 | { | |
c3f829c1 | 648 | char *debugdir = (char *) alloca (token->val.str.len - 3); |
b20d9f0c AO |
649 | |
650 | memcpy (debugdir, (const char *) token->val.str.text + 1, | |
651 | token->val.str.len - 4); | |
652 | debugdir[token->val.str.len - 4] = '\0'; | |
653 | ||
654 | pfile->cb.dir_change (pfile, debugdir); | |
8e9ea4d7 | 655 | } |
b20d9f0c AO |
656 | } |
657 | ||
76c3e73e | 658 | /* This is called at the end of preprocessing. It pops the last |
148e4216 | 659 | buffer and writes dependency output. |
16dd5cfe | 660 | |
76c3e73e NB |
661 | Maybe it should also reset state, such that you could call |
662 | cpp_start_read with a new filename to restart processing. */ | |
148e4216 | 663 | void |
6cf87ca4 | 664 | cpp_finish (cpp_reader *pfile, FILE *deps_stream) |
6de1e2a9 | 665 | { |
a69cbaac NB |
666 | /* Warn about unused macros before popping the final buffer. */ |
667 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
668 | cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); | |
669 | ||
a2566ae9 | 670 | /* lex.c leaves the final buffer on the stack. This it so that |
7364fdd8 | 671 | it returns an unending stream of CPP_EOFs to the client. If we |
a1f300c0 | 672 | popped the buffer, we'd dereference a NULL buffer pointer and |
7364fdd8 NB |
673 | segfault. It's nice to allow the client to do worry-free excess |
674 | cpp_get_token calls. */ | |
675 | while (pfile->buffer) | |
676 | _cpp_pop_buffer (pfile); | |
c1212d2f | 677 | |
f4ff5a69 | 678 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE |
148e4216 | 679 | && deps_stream) |
76c3e73e NB |
680 | { |
681 | deps_write (pfile->deps, deps_stream, 72); | |
682 | ||
f4ff5a69 | 683 | if (CPP_OPTION (pfile, deps.phony_targets)) |
76c3e73e NB |
684 | deps_phony_targets (pfile->deps, deps_stream); |
685 | } | |
3caee4a8 | 686 | |
d4506961 ZW |
687 | /* Report on headers that could use multiple include guards. */ |
688 | if (CPP_OPTION (pfile, print_include_names)) | |
c71f835b | 689 | _cpp_report_missing_guards (pfile); |
6de1e2a9 ZW |
690 | } |
691 | ||
f4ff5a69 | 692 | static void |
6cf87ca4 | 693 | post_options (cpp_reader *pfile) |
96302433 NB |
694 | { |
695 | /* -Wtraditional is not useful in C++ mode. */ | |
696 | if (CPP_OPTION (pfile, cplusplus)) | |
697 | CPP_OPTION (pfile, warn_traditional) = 0; | |
698 | ||
6d4587f7 | 699 | /* Permanently disable macro expansion if we are rescanning |
43612ffb | 700 | preprocessed text. Read preprocesed source in ISO mode. */ |
6d4587f7 | 701 | if (CPP_OPTION (pfile, preprocessed)) |
43612ffb | 702 | { |
ccfc4c91 OW |
703 | if (!CPP_OPTION (pfile, directives_only)) |
704 | pfile->state.prevent_expansion = 1; | |
43612ffb NB |
705 | CPP_OPTION (pfile, traditional) = 0; |
706 | } | |
707 | ||
a8eb6044 NB |
708 | if (CPP_OPTION (pfile, warn_trigraphs) == 2) |
709 | CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs); | |
710 | ||
43612ffb | 711 | if (CPP_OPTION (pfile, traditional)) |
26aea073 | 712 | { |
a09d4744 NB |
713 | CPP_OPTION (pfile, cplusplus_comments) = 0; |
714 | ||
26aea073 NB |
715 | /* Traditional CPP does not accurately track column information. */ |
716 | CPP_OPTION (pfile, show_column) = 0; | |
717 | CPP_OPTION (pfile, trigraphs) = 0; | |
718 | CPP_OPTION (pfile, warn_trigraphs) = 0; | |
719 | } | |
7ca3d2b1 | 720 | } |