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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 }, | |
2778d766 | 87 | /* GNUC1X */ { 1, 0, 1, 0, 0, 1, 1, 1 }, |
b6baa67d KVH |
88 | /* STDC89 */ { 0, 0, 0, 0, 1, 0, 0, 0 }, |
89 | /* STDC94 */ { 0, 0, 0, 0, 1, 0, 1, 0 }, | |
90 | /* STDC99 */ { 1, 0, 1, 0, 1, 1, 1, 0 }, | |
2778d766 | 91 | /* STDC1X */ { 1, 0, 1, 0, 1, 1, 1, 0 }, |
b6baa67d KVH |
92 | /* GNUCXX */ { 0, 1, 1, 0, 0, 1, 1, 0 }, |
93 | /* CXX98 */ { 0, 1, 1, 0, 1, 1, 1, 0 }, | |
94 | /* GNUCXX0X */ { 1, 1, 1, 0, 0, 1, 1, 1 }, | |
95 | /* CXX0X */ { 1, 1, 1, 0, 1, 1, 1, 1 }, | |
96 | /* ASM */ { 0, 0, 1, 0, 0, 1, 0, 0 } | |
dfafdaa6 DG |
97 | /* xid should be 1 for GNUC99, STDC99, GNUCXX, CXX98, GNUCXX0X, and |
98 | CXX0X when no longer experimental (when all uses of identifiers | |
99 | in the compiler have been audited for correct handling of | |
100 | extended identifiers). */ | |
a01eb545 ZW |
101 | }; |
102 | ||
5d8ebbd8 | 103 | /* Sets internal flags correctly for a given language. */ |
f749a36b | 104 | void |
6cf87ca4 | 105 | cpp_set_lang (cpp_reader *pfile, enum c_lang lang) |
dd07b884 | 106 | { |
a01eb545 | 107 | const struct lang_flags *l = &lang_defaults[(int) lang]; |
df383483 | 108 | |
bdb05a7b | 109 | CPP_OPTION (pfile, lang) = lang; |
dd07b884 | 110 | |
af15a2fe JM |
111 | CPP_OPTION (pfile, c99) = l->c99; |
112 | CPP_OPTION (pfile, cplusplus) = l->cplusplus; | |
113 | CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; | |
114 | CPP_OPTION (pfile, extended_identifiers) = l->extended_identifiers; | |
115 | CPP_OPTION (pfile, std) = l->std; | |
116 | CPP_OPTION (pfile, trigraphs) = l->std; | |
117 | CPP_OPTION (pfile, cplusplus_comments) = l->cplusplus_comments; | |
118 | CPP_OPTION (pfile, digraphs) = l->digraphs; | |
b6baa67d | 119 | CPP_OPTION (pfile, uliterals) = l->uliterals; |
dd07b884 NB |
120 | } |
121 | ||
c1bad961 | 122 | /* Initialize library global state. */ |
cf44ea52 | 123 | static void |
6cf87ca4 | 124 | init_library (void) |
cf44ea52 | 125 | { |
7ca3d2b1 NB |
126 | static int initialized = 0; |
127 | ||
128 | if (! initialized) | |
129 | { | |
130 | initialized = 1; | |
131 | ||
7ca3d2b1 NB |
132 | /* Set up the trigraph map. This doesn't need to do anything if |
133 | we were compiled with a compiler that supports C99 designated | |
134 | initializers. */ | |
135 | init_trigraph_map (); | |
4f4e53dd PB |
136 | |
137 | #ifdef ENABLE_NLS | |
85eac2a0 | 138 | (void) bindtextdomain (PACKAGE, LOCALEDIR); |
4f4e53dd | 139 | #endif |
7ca3d2b1 | 140 | } |
cf44ea52 NB |
141 | } |
142 | ||
ec5c56db | 143 | /* Initialize a cpp_reader structure. */ |
cf44ea52 | 144 | cpp_reader * |
50f59cd7 PB |
145 | cpp_create_reader (enum c_lang lang, hash_table *table, |
146 | struct line_maps *line_table) | |
6de1e2a9 | 147 | { |
7ca3d2b1 | 148 | cpp_reader *pfile; |
93c80368 | 149 | |
4912a07c | 150 | /* Initialize this instance of the library if it hasn't been already. */ |
674c3b40 | 151 | init_library (); |
7ca3d2b1 | 152 | |
c3f829c1 | 153 | pfile = XCNEW (cpp_reader); |
93c80368 | 154 | |
f749a36b | 155 | cpp_set_lang (pfile, lang); |
a5a49440 | 156 | CPP_OPTION (pfile, warn_multichar) = 1; |
ae79697b | 157 | CPP_OPTION (pfile, discard_comments) = 1; |
477cdac7 | 158 | CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; |
6ab3e7dd | 159 | CPP_OPTION (pfile, tabstop) = 8; |
be768055 | 160 | CPP_OPTION (pfile, operator_names) = 1; |
a8eb6044 | 161 | CPP_OPTION (pfile, warn_trigraphs) = 2; |
909de5da | 162 | CPP_OPTION (pfile, warn_endif_labels) = 1; |
e3339d0f JM |
163 | CPP_OPTION (pfile, cpp_warn_deprecated) = 1; |
164 | CPP_OPTION (pfile, cpp_warn_long_long) = 0; | |
b1822ccc | 165 | CPP_OPTION (pfile, dollars_in_ident) = 1; |
78b8811a | 166 | CPP_OPTION (pfile, warn_dollars) = 1; |
e5b79219 | 167 | CPP_OPTION (pfile, warn_variadic_macros) = 1; |
c047ce93 | 168 | CPP_OPTION (pfile, warn_builtin_macro_redefined) = 1; |
50668cf6 | 169 | CPP_OPTION (pfile, warn_normalize) = normalized_C; |
ae79697b | 170 | |
2443d4e1 NB |
171 | /* Default CPP arithmetic to something sensible for the host for the |
172 | benefit of dumb users like fix-header. */ | |
c9220e3a | 173 | CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); |
2443d4e1 NB |
174 | CPP_OPTION (pfile, char_precision) = CHAR_BIT; |
175 | CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); | |
176 | CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); | |
2a1dc0d8 | 177 | CPP_OPTION (pfile, unsigned_char) = 0; |
44a147ad | 178 | CPP_OPTION (pfile, unsigned_wchar) = 1; |
e6cc3a24 ZW |
179 | CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */ |
180 | ||
181 | /* Default to no charset conversion. */ | |
16dd5cfe | 182 | CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding (); |
e6cc3a24 | 183 | CPP_OPTION (pfile, wide_charset) = 0; |
4268e8bb | 184 | |
16dd5cfe EC |
185 | /* Default the input character set to UTF-8. */ |
186 | CPP_OPTION (pfile, input_charset) = _cpp_default_encoding (); | |
cf551fba | 187 | |
8f9b4009 NB |
188 | /* A fake empty "directory" used as the starting point for files |
189 | looked up without a search path. Name cannot be '/' because we | |
190 | don't want to prepend anything at all to filenames using it. All | |
191 | other entries are correct zero-initialized. */ | |
192 | pfile->no_search_path.name = (char *) ""; | |
193 | ||
500bee0a | 194 | /* Initialize the line map. */ |
50f59cd7 | 195 | pfile->line_table = line_table; |
d82fc108 | 196 | |
4a58aab6 | 197 | /* Initialize lexer state. */ |
93c80368 NB |
198 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
199 | ||
4ed5bcfb | 200 | /* Set up static tokens. */ |
4ed5bcfb NB |
201 | pfile->avoid_paste.type = CPP_PADDING; |
202 | pfile->avoid_paste.val.source = NULL; | |
203 | pfile->eof.type = CPP_EOF; | |
204 | pfile->eof.flags = 0; | |
93c80368 | 205 | |
5fddcffc NB |
206 | /* Create a token buffer for the lexer. */ |
207 | _cpp_init_tokenrun (&pfile->base_run, 250); | |
208 | pfile->cur_run = &pfile->base_run; | |
209 | pfile->cur_token = pfile->base_run.base; | |
5fddcffc | 210 | |
4912a07c | 211 | /* Initialize the base context. */ |
93c80368 NB |
212 | pfile->context = &pfile->base_context; |
213 | pfile->base_context.macro = 0; | |
214 | pfile->base_context.prev = pfile->base_context.next = 0; | |
215 | ||
8c3b2693 NB |
216 | /* Aligned and unaligned storage. */ |
217 | pfile->a_buff = _cpp_get_buff (pfile, 0); | |
ece54d54 | 218 | pfile->u_buff = _cpp_get_buff (pfile, 0); |
93c80368 | 219 | |
17e7cb85 KT |
220 | /* Initialize table for push_macro/pop_macro. */ |
221 | pfile->pushed_macros = 0; | |
222 | ||
87ed109f NB |
223 | /* The expression parser stack. */ |
224 | _cpp_expand_op_stack (pfile); | |
225 | ||
4912a07c | 226 | /* Initialize the buffer obstack. */ |
43839642 ZW |
227 | _obstack_begin (&pfile->buffer_ob, 0, 0, |
228 | (void *(*) (long)) xmalloc, | |
229 | (void (*) (void *)) free); | |
2a967f3d | 230 | |
8f9b4009 | 231 | _cpp_init_files (pfile); |
cf44ea52 | 232 | |
b4e46cea PB |
233 | _cpp_init_hashtable (pfile, table); |
234 | ||
cf44ea52 | 235 | return pfile; |
f2d5f0cc ZW |
236 | } |
237 | ||
5ffeb913 TT |
238 | /* Set the line_table entry in PFILE. This is called after reading a |
239 | PCH file, as the old line_table will be incorrect. */ | |
240 | void | |
241 | cpp_set_line_map (cpp_reader *pfile, struct line_maps *line_table) | |
242 | { | |
243 | pfile->line_table = line_table; | |
244 | } | |
245 | ||
400023a3 | 246 | /* Free resources used by PFILE. Accessing PFILE after this function |
8d9afc4e | 247 | returns leads to undefined behavior. Returns the error count. */ |
76c3e73e | 248 | void |
6cf87ca4 | 249 | cpp_destroy (cpp_reader *pfile) |
6de1e2a9 | 250 | { |
93c80368 | 251 | cpp_context *context, *contextn; |
17e7cb85 | 252 | struct def_pragma_macro *pmacro; |
50410426 | 253 | tokenrun *run, *runn; |
631d0d36 | 254 | int i; |
709e9e50 | 255 | |
87ed109f | 256 | free (pfile->op_stack); |
af0d16cd | 257 | |
38b24ee2 | 258 | while (CPP_BUFFER (pfile) != NULL) |
ef6e958a | 259 | _cpp_pop_buffer (pfile); |
6de1e2a9 | 260 | |
1a76916c NB |
261 | if (pfile->out.base) |
262 | free (pfile->out.base); | |
004cb263 | 263 | |
93c80368 | 264 | if (pfile->macro_buffer) |
4b49c365 | 265 | { |
fad205ff | 266 | free (pfile->macro_buffer); |
4b49c365 AO |
267 | pfile->macro_buffer = NULL; |
268 | pfile->macro_buffer_len = 0; | |
269 | } | |
93c80368 | 270 | |
f4ff5a69 NB |
271 | if (pfile->deps) |
272 | deps_free (pfile->deps); | |
2a967f3d | 273 | obstack_free (&pfile->buffer_ob, 0); |
49e6c08e | 274 | |
2a967f3d | 275 | _cpp_destroy_hashtable (pfile); |
8f9b4009 | 276 | _cpp_cleanup_files (pfile); |
e6cc3a24 | 277 | _cpp_destroy_iconv (pfile); |
709e9e50 | 278 | |
8c3b2693 | 279 | _cpp_free_buff (pfile->a_buff); |
ece54d54 | 280 | _cpp_free_buff (pfile->u_buff); |
b8af0ca5 | 281 | _cpp_free_buff (pfile->free_buffs); |
93c80368 | 282 | |
50410426 NB |
283 | for (run = &pfile->base_run; run; run = runn) |
284 | { | |
285 | runn = run->next; | |
286 | free (run->base); | |
287 | if (run != &pfile->base_run) | |
288 | free (run); | |
289 | } | |
290 | ||
93c80368 NB |
291 | for (context = pfile->base_context.next; context; context = contextn) |
292 | { | |
293 | contextn = context->next; | |
294 | free (context); | |
295 | } | |
400023a3 | 296 | |
631d0d36 MG |
297 | if (pfile->comments.entries) |
298 | { | |
299 | for (i = 0; i < pfile->comments.count; i++) | |
300 | free (pfile->comments.entries[i].comment); | |
301 | ||
302 | free (pfile->comments.entries); | |
303 | } | |
17e7cb85 KT |
304 | if (pfile->pushed_macros) |
305 | { | |
306 | do | |
307 | { | |
308 | pmacro = pfile->pushed_macros; | |
309 | pfile->pushed_macros = pmacro->next; | |
310 | free (pmacro->name); | |
311 | free (pmacro); | |
312 | } | |
313 | while (pfile->pushed_macros); | |
314 | } | |
631d0d36 | 315 | |
400023a3 | 316 | free (pfile); |
6de1e2a9 ZW |
317 | } |
318 | ||
93c80368 | 319 | /* This structure defines one built-in identifier. A node will be |
f24a153a ZW |
320 | entered in the hash table under the name NAME, with value VALUE. |
321 | ||
322 | There are two tables of these. builtin_array holds all the | |
323 | "builtin" macros: these are handled by builtin_macro() in | |
a2566ae9 | 324 | macro.c. Builtin is somewhat of a misnomer -- the property of |
f24a153a | 325 | interest is that these macros require special code to compute their |
128465e6 | 326 | expansions. The value is a "cpp_builtin_type" enumerator. |
f24a153a ZW |
327 | |
328 | operator_array holds the C++ named operators. These are keywords | |
329 | which act as aliases for punctuators. In C++, they cannot be | |
330 | altered through #define, and #if recognizes them as operators. In | |
331 | C, these are not entered into the hash table at all (but see | |
332 | <iso646.h>). The value is a token-type enumerator. */ | |
c047ce93 | 333 | struct builtin_macro |
a9ae4483 | 334 | { |
c047ce93 SB |
335 | const uchar *const name; |
336 | const unsigned short len; | |
337 | const unsigned short value; | |
338 | const bool always_warn_if_redefined; | |
a9ae4483 | 339 | }; |
93c80368 | 340 | |
c047ce93 SB |
341 | #define B(n, t, f) { DSC(n), t, f } |
342 | static const struct builtin_macro builtin_array[] = | |
6de1e2a9 | 343 | { |
c047ce93 SB |
344 | B("__TIMESTAMP__", BT_TIMESTAMP, false), |
345 | B("__TIME__", BT_TIME, false), | |
346 | B("__DATE__", BT_DATE, false), | |
347 | B("__FILE__", BT_FILE, false), | |
348 | B("__BASE_FILE__", BT_BASE_FILE, false), | |
349 | B("__LINE__", BT_SPECLINE, true), | |
350 | B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL, true), | |
351 | B("__COUNTER__", BT_COUNTER, true), | |
278c4662 NB |
352 | /* Keep builtins not used for -traditional-cpp at the end, and |
353 | update init_builtins() if any more are added. */ | |
c047ce93 SB |
354 | B("_Pragma", BT_PRAGMA, true), |
355 | B("__STDC__", BT_STDC, true), | |
356 | }; | |
357 | #undef B | |
358 | ||
359 | struct builtin_operator | |
360 | { | |
361 | const uchar *const name; | |
362 | const unsigned short len; | |
363 | const unsigned short value; | |
f24a153a | 364 | }; |
92936ecf | 365 | |
c047ce93 SB |
366 | #define B(n, t) { DSC(n), t } |
367 | static const struct builtin_operator operator_array[] = | |
f24a153a ZW |
368 | { |
369 | B("and", CPP_AND_AND), | |
370 | B("and_eq", CPP_AND_EQ), | |
371 | B("bitand", CPP_AND), | |
372 | B("bitor", CPP_OR), | |
373 | B("compl", CPP_COMPL), | |
374 | B("not", CPP_NOT), | |
375 | B("not_eq", CPP_NOT_EQ), | |
376 | B("or", CPP_OR_OR), | |
377 | B("or_eq", CPP_OR_EQ), | |
378 | B("xor", CPP_XOR), | |
379 | B("xor_eq", CPP_XOR_EQ) | |
a9ae4483 | 380 | }; |
12cf91fe | 381 | #undef B |
a9ae4483 | 382 | |
17645b15 NB |
383 | /* Mark the C++ named operators in the hash table. */ |
384 | static void | |
3d8b2a98 | 385 | mark_named_operators (cpp_reader *pfile, int flags) |
17645b15 | 386 | { |
c047ce93 | 387 | const struct builtin_operator *b; |
17645b15 NB |
388 | |
389 | for (b = operator_array; | |
390 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
391 | b++) | |
392 | { | |
393 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
3d8b2a98 | 394 | hp->flags |= flags; |
4977bab6 ZW |
395 | hp->is_directive = 0; |
396 | hp->directive_index = b->value; | |
17645b15 NB |
397 | } |
398 | } | |
399 | ||
cfc93532 MLI |
400 | /* Helper function of cpp_type2name. Return the string associated with |
401 | named operator TYPE. */ | |
402 | const char * | |
403 | cpp_named_operator2name (enum cpp_ttype type) | |
404 | { | |
405 | const struct builtin_operator *b; | |
406 | ||
407 | for (b = operator_array; | |
408 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
409 | b++) | |
410 | { | |
411 | if (type == b->value) | |
412 | return (const char *) b->name; | |
413 | } | |
414 | ||
415 | return NULL; | |
416 | } | |
417 | ||
c1bad961 | 418 | void |
ccfc4c91 | 419 | cpp_init_special_builtins (cpp_reader *pfile) |
a9ae4483 | 420 | { |
c047ce93 | 421 | const struct builtin_macro *b; |
278c4662 | 422 | size_t n = ARRAY_SIZE (builtin_array); |
771c4df3 | 423 | |
278c4662 NB |
424 | if (CPP_OPTION (pfile, traditional)) |
425 | n -= 2; | |
83900997 JJ |
426 | else if (! CPP_OPTION (pfile, stdc_0_in_system_headers) |
427 | || CPP_OPTION (pfile, std)) | |
ccfc4c91 | 428 | n--; |
278c4662 | 429 | |
83900997 | 430 | for (b = builtin_array; b < builtin_array + n; b++) |
6de1e2a9 | 431 | { |
f24a153a ZW |
432 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
433 | hp->type = NT_MACRO; | |
c047ce93 SB |
434 | hp->flags |= NODE_BUILTIN; |
435 | if (b->always_warn_if_redefined | |
436 | || CPP_OPTION (pfile, warn_builtin_macro_redefined)) | |
437 | hp->flags |= NODE_WARN; | |
7e5487a2 | 438 | hp->value.builtin = (enum cpp_builtin_type) b->value; |
6de1e2a9 | 439 | } |
ccfc4c91 OW |
440 | } |
441 | ||
442 | /* Read the builtins table above and enter them, and language-specific | |
443 | macros, into the hash table. HOSTED is true if this is a hosted | |
444 | environment. */ | |
445 | void | |
446 | cpp_init_builtins (cpp_reader *pfile, int hosted) | |
447 | { | |
448 | cpp_init_special_builtins (pfile); | |
449 | ||
450 | if (!CPP_OPTION (pfile, traditional) | |
451 | && (! CPP_OPTION (pfile, stdc_0_in_system_headers) | |
452 | || CPP_OPTION (pfile, std))) | |
453 | _cpp_define_builtin (pfile, "__STDC__ 1"); | |
c740cee2 NB |
454 | |
455 | if (CPP_OPTION (pfile, cplusplus)) | |
3d90d290 | 456 | _cpp_define_builtin (pfile, "__cplusplus 1"); |
2a1dc0d8 ZW |
457 | else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
458 | _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); | |
0f7866e7 | 459 | else if (CPP_OPTION (pfile, lang) == CLK_STDC94) |
c740cee2 | 460 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); |
2778d766 JM |
461 | else if (CPP_OPTION (pfile, lang) == CLK_STDC1X |
462 | || CPP_OPTION (pfile, lang) == CLK_GNUC1X) | |
463 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 201000L"); | |
c740cee2 NB |
464 | else if (CPP_OPTION (pfile, c99)) |
465 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); | |
466 | ||
6e270179 | 467 | if (hosted) |
58b5b894 | 468 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1"); |
6e270179 | 469 | else |
58b5b894 | 470 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0"); |
6e270179 | 471 | |
0f7866e7 ZL |
472 | if (CPP_OPTION (pfile, objc)) |
473 | _cpp_define_builtin (pfile, "__OBJC__ 1"); | |
4a58aab6 NB |
474 | } |
475 | ||
2443d4e1 NB |
476 | /* Sanity-checks are dependent on command-line options, so it is |
477 | called as a subroutine of cpp_read_main_file (). */ | |
478 | #if ENABLE_CHECKING | |
6cf87ca4 ZW |
479 | static void sanity_checks (cpp_reader *); |
480 | static void sanity_checks (cpp_reader *pfile) | |
2443d4e1 NB |
481 | { |
482 | cppchar_t test = 0; | |
c9220e3a | 483 | size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); |
2443d4e1 NB |
484 | |
485 | /* Sanity checks for assumptions about CPP arithmetic and target | |
486 | type precisions made by cpplib. */ | |
487 | test--; | |
488 | if (test < 1) | |
0527bc4e | 489 | cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type"); |
2443d4e1 | 490 | |
c9220e3a | 491 | if (CPP_OPTION (pfile, precision) > max_precision) |
0527bc4e | 492 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
493 | "preprocessor arithmetic has maximum precision of %lu bits;" |
494 | " target requires %lu bits", | |
c9220e3a NB |
495 | (unsigned long) max_precision, |
496 | (unsigned long) CPP_OPTION (pfile, precision)); | |
2443d4e1 NB |
497 | |
498 | if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) | |
0527bc4e | 499 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
500 | "CPP arithmetic must be at least as precise as a target int"); |
501 | ||
502 | if (CPP_OPTION (pfile, char_precision) < 8) | |
0527bc4e | 503 | cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide"); |
2443d4e1 NB |
504 | |
505 | if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 506 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
507 | "target wchar_t is narrower than target char"); |
508 | ||
509 | if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 510 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
511 | "target int is narrower than target char"); |
512 | ||
c9220e3a NB |
513 | /* This is assumed in eval_token() and could be fixed if necessary. */ |
514 | if (sizeof (cppchar_t) > sizeof (cpp_num_part)) | |
0527bc4e JDA |
515 | cpp_error (pfile, CPP_DL_ICE, |
516 | "CPP half-integer narrower than CPP character"); | |
c9220e3a | 517 | |
2443d4e1 | 518 | if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) |
0527bc4e | 519 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
520 | "CPP on this host cannot handle wide character constants over" |
521 | " %lu bits, but the target requires %lu bits", | |
c9220e3a NB |
522 | (unsigned long) BITS_PER_CPPCHAR_T, |
523 | (unsigned long) CPP_OPTION (pfile, wchar_precision)); | |
2443d4e1 NB |
524 | } |
525 | #else | |
526 | # define sanity_checks(PFILE) | |
527 | #endif | |
528 | ||
f5e99456 | 529 | /* This is called after options have been parsed, and partially |
59e4e217 | 530 | processed. */ |
4169c321 PB |
531 | void |
532 | cpp_post_options (cpp_reader *pfile) | |
6de1e2a9 | 533 | { |
3d8b2a98 ILT |
534 | int flags; |
535 | ||
2443d4e1 NB |
536 | sanity_checks (pfile); |
537 | ||
f4ff5a69 NB |
538 | post_options (pfile); |
539 | ||
c19b12cb | 540 | /* Mark named operators before handling command line macros. */ |
3d8b2a98 | 541 | flags = 0; |
c19b12cb | 542 | if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) |
3d8b2a98 ILT |
543 | flags |= NODE_OPERATOR; |
544 | if (CPP_OPTION (pfile, warn_cxx_operator_names)) | |
545 | flags |= NODE_DIAGNOSTIC | NODE_WARN_OPERATOR; | |
546 | if (flags != 0) | |
547 | mark_named_operators (pfile, flags); | |
4169c321 | 548 | } |
c19b12cb | 549 | |
4dc299fb | 550 | /* Setup for processing input from the file named FNAME, or stdin if |
8e9ea4d7 PB |
551 | it is the empty string. Return the original filename |
552 | on success (e.g. foo.i->foo.c), or NULL on failure. */ | |
553 | const char * | |
554 | cpp_read_main_file (cpp_reader *pfile, const char *fname) | |
4169c321 | 555 | { |
f4ff5a69 NB |
556 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
557 | { | |
558 | if (!pfile->deps) | |
559 | pfile->deps = deps_init (); | |
560 | ||
561 | /* Set the default target (if there is none already). */ | |
562 | deps_add_default_target (pfile->deps, fname); | |
563 | } | |
96302433 | 564 | |
4dc299fb | 565 | pfile->main_file |
6568f34b | 566 | = _cpp_find_file (pfile, fname, &pfile->no_search_path, false, 0); |
4dc299fb | 567 | if (_cpp_find_failed (pfile->main_file)) |
3092d0fc | 568 | return NULL; |
f5e99456 | 569 | |
4dc299fb PB |
570 | _cpp_stack_file (pfile, pfile->main_file, false); |
571 | ||
572 | /* For foo.i, read the original filename foo.c now, for the benefit | |
573 | of the front ends. */ | |
574 | if (CPP_OPTION (pfile, preprocessed)) | |
8e9ea4d7 PB |
575 | { |
576 | read_original_filename (pfile); | |
12f9df4e | 577 | fname = pfile->line_table->maps[pfile->line_table->used-1].to_file; |
8e9ea4d7 PB |
578 | } |
579 | return fname; | |
f5e99456 NB |
580 | } |
581 | ||
582 | /* For preprocessed files, if the first tokens are of the form # NUM. | |
583 | handle the directive so we know the original file name. This will | |
584 | generate file_change callbacks, which the front ends must handle | |
585 | appropriately given their state of initialization. */ | |
586 | static void | |
6cf87ca4 | 587 | read_original_filename (cpp_reader *pfile) |
f5e99456 NB |
588 | { |
589 | const cpp_token *token, *token1; | |
590 | ||
591 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
592 | process the directive, otherwise back up. */ | |
593 | token = _cpp_lex_direct (pfile); | |
594 | if (token->type == CPP_HASH) | |
595 | { | |
456b8ce5 | 596 | pfile->state.in_directive = 1; |
f5e99456 NB |
597 | token1 = _cpp_lex_direct (pfile); |
598 | _cpp_backup_tokens (pfile, 1); | |
456b8ce5 | 599 | pfile->state.in_directive = 0; |
f5e99456 NB |
600 | |
601 | /* If it's a #line directive, handle it. */ | |
709d7160 JJ |
602 | if (token1->type == CPP_NUMBER |
603 | && _cpp_handle_directive (pfile, token->flags & PREV_WHITE)) | |
f5e99456 | 604 | { |
b20d9f0c | 605 | read_original_directory (pfile); |
f5e99456 NB |
606 | return; |
607 | } | |
608 | } | |
609 | ||
610 | /* Backup as if nothing happened. */ | |
611 | _cpp_backup_tokens (pfile, 1); | |
612 | } | |
613 | ||
b20d9f0c AO |
614 | /* For preprocessed files, if the tokens following the first filename |
615 | line is of the form # <line> "/path/name//", handle the | |
616 | directive so we know the original current directory. */ | |
617 | static void | |
618 | read_original_directory (cpp_reader *pfile) | |
619 | { | |
620 | const cpp_token *hash, *token; | |
621 | ||
622 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
623 | process the directive, otherwise back up. */ | |
624 | hash = _cpp_lex_direct (pfile); | |
625 | if (hash->type != CPP_HASH) | |
626 | { | |
627 | _cpp_backup_tokens (pfile, 1); | |
628 | return; | |
629 | } | |
630 | ||
631 | token = _cpp_lex_direct (pfile); | |
632 | ||
633 | if (token->type != CPP_NUMBER) | |
634 | { | |
635 | _cpp_backup_tokens (pfile, 2); | |
636 | return; | |
637 | } | |
638 | ||
639 | token = _cpp_lex_direct (pfile); | |
640 | ||
641 | if (token->type != CPP_STRING | |
642 | || ! (token->val.str.len >= 5 | |
643 | && token->val.str.text[token->val.str.len-2] == '/' | |
644 | && token->val.str.text[token->val.str.len-3] == '/')) | |
645 | { | |
646 | _cpp_backup_tokens (pfile, 3); | |
647 | return; | |
648 | } | |
649 | ||
650 | if (pfile->cb.dir_change) | |
651 | { | |
c3f829c1 | 652 | char *debugdir = (char *) alloca (token->val.str.len - 3); |
b20d9f0c AO |
653 | |
654 | memcpy (debugdir, (const char *) token->val.str.text + 1, | |
655 | token->val.str.len - 4); | |
656 | debugdir[token->val.str.len - 4] = '\0'; | |
657 | ||
658 | pfile->cb.dir_change (pfile, debugdir); | |
8e9ea4d7 | 659 | } |
b20d9f0c AO |
660 | } |
661 | ||
76c3e73e | 662 | /* This is called at the end of preprocessing. It pops the last |
148e4216 | 663 | buffer and writes dependency output. |
16dd5cfe | 664 | |
76c3e73e NB |
665 | Maybe it should also reset state, such that you could call |
666 | cpp_start_read with a new filename to restart processing. */ | |
148e4216 | 667 | void |
6cf87ca4 | 668 | cpp_finish (cpp_reader *pfile, FILE *deps_stream) |
6de1e2a9 | 669 | { |
a69cbaac NB |
670 | /* Warn about unused macros before popping the final buffer. */ |
671 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
672 | cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); | |
673 | ||
a2566ae9 | 674 | /* lex.c leaves the final buffer on the stack. This it so that |
7364fdd8 | 675 | it returns an unending stream of CPP_EOFs to the client. If we |
a1f300c0 | 676 | popped the buffer, we'd dereference a NULL buffer pointer and |
7364fdd8 NB |
677 | segfault. It's nice to allow the client to do worry-free excess |
678 | cpp_get_token calls. */ | |
679 | while (pfile->buffer) | |
680 | _cpp_pop_buffer (pfile); | |
c1212d2f | 681 | |
f4ff5a69 | 682 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE |
148e4216 | 683 | && deps_stream) |
76c3e73e NB |
684 | { |
685 | deps_write (pfile->deps, deps_stream, 72); | |
686 | ||
f4ff5a69 | 687 | if (CPP_OPTION (pfile, deps.phony_targets)) |
76c3e73e NB |
688 | deps_phony_targets (pfile->deps, deps_stream); |
689 | } | |
3caee4a8 | 690 | |
d4506961 ZW |
691 | /* Report on headers that could use multiple include guards. */ |
692 | if (CPP_OPTION (pfile, print_include_names)) | |
c71f835b | 693 | _cpp_report_missing_guards (pfile); |
6de1e2a9 ZW |
694 | } |
695 | ||
f4ff5a69 | 696 | static void |
6cf87ca4 | 697 | post_options (cpp_reader *pfile) |
96302433 NB |
698 | { |
699 | /* -Wtraditional is not useful in C++ mode. */ | |
700 | if (CPP_OPTION (pfile, cplusplus)) | |
e3339d0f | 701 | CPP_OPTION (pfile, cpp_warn_traditional) = 0; |
96302433 | 702 | |
6d4587f7 | 703 | /* Permanently disable macro expansion if we are rescanning |
43612ffb | 704 | preprocessed text. Read preprocesed source in ISO mode. */ |
6d4587f7 | 705 | if (CPP_OPTION (pfile, preprocessed)) |
43612ffb | 706 | { |
ccfc4c91 OW |
707 | if (!CPP_OPTION (pfile, directives_only)) |
708 | pfile->state.prevent_expansion = 1; | |
43612ffb NB |
709 | CPP_OPTION (pfile, traditional) = 0; |
710 | } | |
711 | ||
a8eb6044 NB |
712 | if (CPP_OPTION (pfile, warn_trigraphs) == 2) |
713 | CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs); | |
714 | ||
43612ffb | 715 | if (CPP_OPTION (pfile, traditional)) |
26aea073 | 716 | { |
a09d4744 NB |
717 | CPP_OPTION (pfile, cplusplus_comments) = 0; |
718 | ||
26aea073 NB |
719 | CPP_OPTION (pfile, trigraphs) = 0; |
720 | CPP_OPTION (pfile, warn_trigraphs) = 0; | |
721 | } | |
7ca3d2b1 | 722 | } |