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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, |
a48e3dd1 | 4 | 2009, 2010, 2011 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" |
4489800d | 29 | #include "filenames.h" |
88ae23e7 | 30 | |
6cf87ca4 | 31 | static void init_library (void); |
3d8b2a98 | 32 | static void mark_named_operators (cpp_reader *, int); |
6cf87ca4 | 33 | static void read_original_filename (cpp_reader *); |
b20d9f0c | 34 | static void read_original_directory (cpp_reader *); |
6cf87ca4 | 35 | static void post_options (cpp_reader *); |
6de1e2a9 | 36 | |
61d0346d NB |
37 | /* If we have designated initializers (GCC >2.7) these tables can be |
38 | initialized, constant data. Otherwise, they have to be filled in at | |
12cf91fe | 39 | runtime. */ |
61d0346d | 40 | #if HAVE_DESIGNATED_INITIALIZERS |
a9ae4483 | 41 | |
4a58aab6 | 42 | #define init_trigraph_map() /* Nothing. */ |
61d0346d | 43 | #define TRIGRAPH_MAP \ |
562a5c27 | 44 | __extension__ const uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { |
61d0346d | 45 | |
a9ae4483 | 46 | #define END }; |
455d2586 | 47 | #define s(p, v) [p] = v, |
61d0346d | 48 | |
a9ae4483 | 49 | #else |
61d0346d | 50 | |
562a5c27 | 51 | #define TRIGRAPH_MAP uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \ |
6cf87ca4 | 52 | static void init_trigraph_map (void) { \ |
61d0346d NB |
53 | unsigned char *x = _cpp_trigraph_map; |
54 | ||
ae79697b | 55 | #define END } |
455d2586 | 56 | #define s(p, v) x[p] = v; |
61d0346d | 57 | |
a9ae4483 | 58 | #endif |
6de1e2a9 | 59 | |
61d0346d NB |
60 | TRIGRAPH_MAP |
61 | s('=', '#') s(')', ']') s('!', '|') | |
62 | s('(', '[') s('\'', '^') s('>', '}') | |
63 | s('/', '\\') s('<', '{') s('-', '~') | |
64 | END | |
65 | ||
a9ae4483 | 66 | #undef s |
455d2586 | 67 | #undef END |
61d0346d | 68 | #undef TRIGRAPH_MAP |
6de1e2a9 | 69 | |
5d8ebbd8 NB |
70 | /* A set of booleans indicating what CPP features each source language |
71 | requires. */ | |
a01eb545 ZW |
72 | struct lang_flags |
73 | { | |
74 | char c99; | |
a01eb545 ZW |
75 | char cplusplus; |
76 | char extended_numbers; | |
af15a2fe | 77 | char extended_identifiers; |
58551c23 | 78 | char std; |
a01eb545 ZW |
79 | char cplusplus_comments; |
80 | char digraphs; | |
b6baa67d | 81 | char uliterals; |
a48e3dd1 | 82 | char rliterals; |
3ce4f9e4 | 83 | char user_literals; |
a01eb545 ZW |
84 | }; |
85 | ||
a01eb545 | 86 | static const struct lang_flags lang_defaults[] = |
3ce4f9e4 ESR |
87 | { /* c99 c++ xnum xid std // digr ulit rlit user_literals */ |
88 | /* GNUC89 */ { 0, 0, 1, 0, 0, 1, 1, 0, 0, 0 }, | |
89 | /* GNUC99 */ { 1, 0, 1, 0, 0, 1, 1, 1, 1, 0 }, | |
90 | /* GNUC1X */ { 1, 0, 1, 0, 0, 1, 1, 1, 1, 0 }, | |
91 | /* STDC89 */ { 0, 0, 0, 0, 1, 0, 0, 0, 0, 0 }, | |
92 | /* STDC94 */ { 0, 0, 0, 0, 1, 0, 1, 0, 0, 0 }, | |
93 | /* STDC99 */ { 1, 0, 1, 0, 1, 1, 1, 0, 0, 0 }, | |
94 | /* STDC1X */ { 1, 0, 1, 0, 1, 1, 1, 1, 0, 0 }, | |
95 | /* GNUCXX */ { 0, 1, 1, 0, 0, 1, 1, 0, 0, 0 }, | |
96 | /* CXX98 */ { 0, 1, 1, 0, 1, 1, 1, 0, 0, 0 }, | |
97e3ad20 JM |
97 | /* GNUCXX11 */ { 1, 1, 1, 0, 0, 1, 1, 1, 1, 1 }, |
98 | /* CXX11 */ { 1, 1, 1, 0, 1, 1, 1, 1, 1, 1 }, | |
3ce4f9e4 | 99 | /* ASM */ { 0, 0, 1, 0, 0, 1, 0, 0, 0, 0 } |
97e3ad20 JM |
100 | /* xid should be 1 for GNUC99, STDC99, GNUCXX, CXX98, GNUCXX11, and |
101 | CXX11 when no longer experimental (when all uses of identifiers | |
dfafdaa6 DG |
102 | in the compiler have been audited for correct handling of |
103 | extended identifiers). */ | |
a01eb545 ZW |
104 | }; |
105 | ||
5d8ebbd8 | 106 | /* Sets internal flags correctly for a given language. */ |
f749a36b | 107 | void |
6cf87ca4 | 108 | cpp_set_lang (cpp_reader *pfile, enum c_lang lang) |
dd07b884 | 109 | { |
a01eb545 | 110 | const struct lang_flags *l = &lang_defaults[(int) lang]; |
df383483 | 111 | |
bdb05a7b | 112 | CPP_OPTION (pfile, lang) = lang; |
dd07b884 | 113 | |
af15a2fe JM |
114 | CPP_OPTION (pfile, c99) = l->c99; |
115 | CPP_OPTION (pfile, cplusplus) = l->cplusplus; | |
116 | CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; | |
117 | CPP_OPTION (pfile, extended_identifiers) = l->extended_identifiers; | |
118 | CPP_OPTION (pfile, std) = l->std; | |
119 | CPP_OPTION (pfile, trigraphs) = l->std; | |
120 | CPP_OPTION (pfile, cplusplus_comments) = l->cplusplus_comments; | |
121 | CPP_OPTION (pfile, digraphs) = l->digraphs; | |
b6baa67d | 122 | CPP_OPTION (pfile, uliterals) = l->uliterals; |
a48e3dd1 | 123 | CPP_OPTION (pfile, rliterals) = l->rliterals; |
3ce4f9e4 | 124 | CPP_OPTION (pfile, user_literals) = l->user_literals; |
dd07b884 NB |
125 | } |
126 | ||
c1bad961 | 127 | /* Initialize library global state. */ |
cf44ea52 | 128 | static void |
6cf87ca4 | 129 | init_library (void) |
cf44ea52 | 130 | { |
7ca3d2b1 NB |
131 | static int initialized = 0; |
132 | ||
133 | if (! initialized) | |
134 | { | |
135 | initialized = 1; | |
136 | ||
7ca3d2b1 NB |
137 | /* Set up the trigraph map. This doesn't need to do anything if |
138 | we were compiled with a compiler that supports C99 designated | |
139 | initializers. */ | |
140 | init_trigraph_map (); | |
4f4e53dd PB |
141 | |
142 | #ifdef ENABLE_NLS | |
85eac2a0 | 143 | (void) bindtextdomain (PACKAGE, LOCALEDIR); |
4f4e53dd | 144 | #endif |
7ca3d2b1 | 145 | } |
cf44ea52 NB |
146 | } |
147 | ||
ec5c56db | 148 | /* Initialize a cpp_reader structure. */ |
cf44ea52 | 149 | cpp_reader * |
50f59cd7 PB |
150 | cpp_create_reader (enum c_lang lang, hash_table *table, |
151 | struct line_maps *line_table) | |
6de1e2a9 | 152 | { |
7ca3d2b1 | 153 | cpp_reader *pfile; |
93c80368 | 154 | |
4912a07c | 155 | /* Initialize this instance of the library if it hasn't been already. */ |
674c3b40 | 156 | init_library (); |
7ca3d2b1 | 157 | |
c3f829c1 | 158 | pfile = XCNEW (cpp_reader); |
92582b75 | 159 | memset (&pfile->base_context, 0, sizeof (pfile->base_context)); |
93c80368 | 160 | |
f749a36b | 161 | cpp_set_lang (pfile, lang); |
a5a49440 | 162 | CPP_OPTION (pfile, warn_multichar) = 1; |
ae79697b | 163 | CPP_OPTION (pfile, discard_comments) = 1; |
477cdac7 | 164 | CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; |
6ab3e7dd | 165 | CPP_OPTION (pfile, tabstop) = 8; |
be768055 | 166 | CPP_OPTION (pfile, operator_names) = 1; |
a8eb6044 | 167 | CPP_OPTION (pfile, warn_trigraphs) = 2; |
909de5da | 168 | CPP_OPTION (pfile, warn_endif_labels) = 1; |
e3339d0f JM |
169 | CPP_OPTION (pfile, cpp_warn_deprecated) = 1; |
170 | CPP_OPTION (pfile, cpp_warn_long_long) = 0; | |
b1822ccc | 171 | CPP_OPTION (pfile, dollars_in_ident) = 1; |
78b8811a | 172 | CPP_OPTION (pfile, warn_dollars) = 1; |
e5b79219 | 173 | CPP_OPTION (pfile, warn_variadic_macros) = 1; |
c047ce93 | 174 | CPP_OPTION (pfile, warn_builtin_macro_redefined) = 1; |
50668cf6 | 175 | CPP_OPTION (pfile, warn_normalize) = normalized_C; |
ae79697b | 176 | |
2443d4e1 NB |
177 | /* Default CPP arithmetic to something sensible for the host for the |
178 | benefit of dumb users like fix-header. */ | |
c9220e3a | 179 | CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); |
2443d4e1 NB |
180 | CPP_OPTION (pfile, char_precision) = CHAR_BIT; |
181 | CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); | |
182 | CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); | |
2a1dc0d8 | 183 | CPP_OPTION (pfile, unsigned_char) = 0; |
44a147ad | 184 | CPP_OPTION (pfile, unsigned_wchar) = 1; |
e6cc3a24 ZW |
185 | CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */ |
186 | ||
187 | /* Default to no charset conversion. */ | |
16dd5cfe | 188 | CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding (); |
e6cc3a24 | 189 | CPP_OPTION (pfile, wide_charset) = 0; |
4268e8bb | 190 | |
16dd5cfe EC |
191 | /* Default the input character set to UTF-8. */ |
192 | CPP_OPTION (pfile, input_charset) = _cpp_default_encoding (); | |
cf551fba | 193 | |
8f9b4009 NB |
194 | /* A fake empty "directory" used as the starting point for files |
195 | looked up without a search path. Name cannot be '/' because we | |
196 | don't want to prepend anything at all to filenames using it. All | |
197 | other entries are correct zero-initialized. */ | |
198 | pfile->no_search_path.name = (char *) ""; | |
199 | ||
500bee0a | 200 | /* Initialize the line map. */ |
50f59cd7 | 201 | pfile->line_table = line_table; |
d82fc108 | 202 | |
4a58aab6 | 203 | /* Initialize lexer state. */ |
93c80368 NB |
204 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
205 | ||
4ed5bcfb | 206 | /* Set up static tokens. */ |
4ed5bcfb NB |
207 | pfile->avoid_paste.type = CPP_PADDING; |
208 | pfile->avoid_paste.val.source = NULL; | |
209 | pfile->eof.type = CPP_EOF; | |
210 | pfile->eof.flags = 0; | |
93c80368 | 211 | |
5fddcffc NB |
212 | /* Create a token buffer for the lexer. */ |
213 | _cpp_init_tokenrun (&pfile->base_run, 250); | |
214 | pfile->cur_run = &pfile->base_run; | |
215 | pfile->cur_token = pfile->base_run.base; | |
5fddcffc | 216 | |
4912a07c | 217 | /* Initialize the base context. */ |
93c80368 | 218 | pfile->context = &pfile->base_context; |
92582b75 | 219 | pfile->base_context.c.macro = 0; |
93c80368 NB |
220 | pfile->base_context.prev = pfile->base_context.next = 0; |
221 | ||
8c3b2693 NB |
222 | /* Aligned and unaligned storage. */ |
223 | pfile->a_buff = _cpp_get_buff (pfile, 0); | |
ece54d54 | 224 | pfile->u_buff = _cpp_get_buff (pfile, 0); |
93c80368 | 225 | |
17e7cb85 KT |
226 | /* Initialize table for push_macro/pop_macro. */ |
227 | pfile->pushed_macros = 0; | |
228 | ||
e3dfef44 GC |
229 | /* Do not force token locations by default. */ |
230 | pfile->forced_token_location_p = NULL; | |
231 | ||
87ed109f NB |
232 | /* The expression parser stack. */ |
233 | _cpp_expand_op_stack (pfile); | |
234 | ||
4912a07c | 235 | /* Initialize the buffer obstack. */ |
43839642 ZW |
236 | _obstack_begin (&pfile->buffer_ob, 0, 0, |
237 | (void *(*) (long)) xmalloc, | |
238 | (void (*) (void *)) free); | |
2a967f3d | 239 | |
8f9b4009 | 240 | _cpp_init_files (pfile); |
cf44ea52 | 241 | |
b4e46cea PB |
242 | _cpp_init_hashtable (pfile, table); |
243 | ||
cf44ea52 | 244 | return pfile; |
f2d5f0cc ZW |
245 | } |
246 | ||
5ffeb913 TT |
247 | /* Set the line_table entry in PFILE. This is called after reading a |
248 | PCH file, as the old line_table will be incorrect. */ | |
249 | void | |
250 | cpp_set_line_map (cpp_reader *pfile, struct line_maps *line_table) | |
251 | { | |
252 | pfile->line_table = line_table; | |
253 | } | |
254 | ||
400023a3 | 255 | /* Free resources used by PFILE. Accessing PFILE after this function |
8d9afc4e | 256 | returns leads to undefined behavior. Returns the error count. */ |
76c3e73e | 257 | void |
6cf87ca4 | 258 | cpp_destroy (cpp_reader *pfile) |
6de1e2a9 | 259 | { |
93c80368 | 260 | cpp_context *context, *contextn; |
17e7cb85 | 261 | struct def_pragma_macro *pmacro; |
50410426 | 262 | tokenrun *run, *runn; |
631d0d36 | 263 | int i; |
709e9e50 | 264 | |
87ed109f | 265 | free (pfile->op_stack); |
af0d16cd | 266 | |
38b24ee2 | 267 | while (CPP_BUFFER (pfile) != NULL) |
ef6e958a | 268 | _cpp_pop_buffer (pfile); |
6de1e2a9 | 269 | |
04695783 | 270 | free (pfile->out.base); |
004cb263 | 271 | |
93c80368 | 272 | if (pfile->macro_buffer) |
4b49c365 | 273 | { |
fad205ff | 274 | free (pfile->macro_buffer); |
4b49c365 AO |
275 | pfile->macro_buffer = NULL; |
276 | pfile->macro_buffer_len = 0; | |
277 | } | |
93c80368 | 278 | |
f4ff5a69 NB |
279 | if (pfile->deps) |
280 | deps_free (pfile->deps); | |
2a967f3d | 281 | obstack_free (&pfile->buffer_ob, 0); |
49e6c08e | 282 | |
2a967f3d | 283 | _cpp_destroy_hashtable (pfile); |
8f9b4009 | 284 | _cpp_cleanup_files (pfile); |
e6cc3a24 | 285 | _cpp_destroy_iconv (pfile); |
709e9e50 | 286 | |
8c3b2693 | 287 | _cpp_free_buff (pfile->a_buff); |
ece54d54 | 288 | _cpp_free_buff (pfile->u_buff); |
b8af0ca5 | 289 | _cpp_free_buff (pfile->free_buffs); |
93c80368 | 290 | |
50410426 NB |
291 | for (run = &pfile->base_run; run; run = runn) |
292 | { | |
293 | runn = run->next; | |
294 | free (run->base); | |
295 | if (run != &pfile->base_run) | |
296 | free (run); | |
297 | } | |
298 | ||
93c80368 NB |
299 | for (context = pfile->base_context.next; context; context = contextn) |
300 | { | |
301 | contextn = context->next; | |
302 | free (context); | |
303 | } | |
400023a3 | 304 | |
631d0d36 MG |
305 | if (pfile->comments.entries) |
306 | { | |
307 | for (i = 0; i < pfile->comments.count; i++) | |
308 | free (pfile->comments.entries[i].comment); | |
309 | ||
310 | free (pfile->comments.entries); | |
311 | } | |
17e7cb85 KT |
312 | if (pfile->pushed_macros) |
313 | { | |
314 | do | |
315 | { | |
316 | pmacro = pfile->pushed_macros; | |
317 | pfile->pushed_macros = pmacro->next; | |
318 | free (pmacro->name); | |
319 | free (pmacro); | |
320 | } | |
321 | while (pfile->pushed_macros); | |
322 | } | |
631d0d36 | 323 | |
400023a3 | 324 | free (pfile); |
6de1e2a9 ZW |
325 | } |
326 | ||
93c80368 | 327 | /* This structure defines one built-in identifier. A node will be |
f24a153a ZW |
328 | entered in the hash table under the name NAME, with value VALUE. |
329 | ||
330 | There are two tables of these. builtin_array holds all the | |
331 | "builtin" macros: these are handled by builtin_macro() in | |
a2566ae9 | 332 | macro.c. Builtin is somewhat of a misnomer -- the property of |
f24a153a | 333 | interest is that these macros require special code to compute their |
128465e6 | 334 | expansions. The value is a "cpp_builtin_type" enumerator. |
f24a153a ZW |
335 | |
336 | operator_array holds the C++ named operators. These are keywords | |
337 | which act as aliases for punctuators. In C++, they cannot be | |
338 | altered through #define, and #if recognizes them as operators. In | |
339 | C, these are not entered into the hash table at all (but see | |
340 | <iso646.h>). The value is a token-type enumerator. */ | |
c047ce93 | 341 | struct builtin_macro |
a9ae4483 | 342 | { |
c047ce93 SB |
343 | const uchar *const name; |
344 | const unsigned short len; | |
345 | const unsigned short value; | |
346 | const bool always_warn_if_redefined; | |
a9ae4483 | 347 | }; |
93c80368 | 348 | |
c047ce93 SB |
349 | #define B(n, t, f) { DSC(n), t, f } |
350 | static const struct builtin_macro builtin_array[] = | |
6de1e2a9 | 351 | { |
c047ce93 SB |
352 | B("__TIMESTAMP__", BT_TIMESTAMP, false), |
353 | B("__TIME__", BT_TIME, false), | |
354 | B("__DATE__", BT_DATE, false), | |
355 | B("__FILE__", BT_FILE, false), | |
356 | B("__BASE_FILE__", BT_BASE_FILE, false), | |
357 | B("__LINE__", BT_SPECLINE, true), | |
358 | B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL, true), | |
359 | B("__COUNTER__", BT_COUNTER, true), | |
278c4662 NB |
360 | /* Keep builtins not used for -traditional-cpp at the end, and |
361 | update init_builtins() if any more are added. */ | |
c047ce93 SB |
362 | B("_Pragma", BT_PRAGMA, true), |
363 | B("__STDC__", BT_STDC, true), | |
364 | }; | |
365 | #undef B | |
366 | ||
367 | struct builtin_operator | |
368 | { | |
369 | const uchar *const name; | |
370 | const unsigned short len; | |
371 | const unsigned short value; | |
f24a153a | 372 | }; |
92936ecf | 373 | |
c047ce93 SB |
374 | #define B(n, t) { DSC(n), t } |
375 | static const struct builtin_operator operator_array[] = | |
f24a153a ZW |
376 | { |
377 | B("and", CPP_AND_AND), | |
378 | B("and_eq", CPP_AND_EQ), | |
379 | B("bitand", CPP_AND), | |
380 | B("bitor", CPP_OR), | |
381 | B("compl", CPP_COMPL), | |
382 | B("not", CPP_NOT), | |
383 | B("not_eq", CPP_NOT_EQ), | |
384 | B("or", CPP_OR_OR), | |
385 | B("or_eq", CPP_OR_EQ), | |
386 | B("xor", CPP_XOR), | |
387 | B("xor_eq", CPP_XOR_EQ) | |
a9ae4483 | 388 | }; |
12cf91fe | 389 | #undef B |
a9ae4483 | 390 | |
17645b15 NB |
391 | /* Mark the C++ named operators in the hash table. */ |
392 | static void | |
3d8b2a98 | 393 | mark_named_operators (cpp_reader *pfile, int flags) |
17645b15 | 394 | { |
c047ce93 | 395 | const struct builtin_operator *b; |
17645b15 NB |
396 | |
397 | for (b = operator_array; | |
398 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
399 | b++) | |
400 | { | |
401 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
3d8b2a98 | 402 | hp->flags |= flags; |
4977bab6 ZW |
403 | hp->is_directive = 0; |
404 | hp->directive_index = b->value; | |
17645b15 NB |
405 | } |
406 | } | |
407 | ||
cfc93532 MLI |
408 | /* Helper function of cpp_type2name. Return the string associated with |
409 | named operator TYPE. */ | |
410 | const char * | |
411 | cpp_named_operator2name (enum cpp_ttype type) | |
412 | { | |
413 | const struct builtin_operator *b; | |
414 | ||
415 | for (b = operator_array; | |
416 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
417 | b++) | |
418 | { | |
419 | if (type == b->value) | |
420 | return (const char *) b->name; | |
421 | } | |
422 | ||
423 | return NULL; | |
424 | } | |
425 | ||
c1bad961 | 426 | void |
ccfc4c91 | 427 | cpp_init_special_builtins (cpp_reader *pfile) |
a9ae4483 | 428 | { |
c047ce93 | 429 | const struct builtin_macro *b; |
278c4662 | 430 | size_t n = ARRAY_SIZE (builtin_array); |
771c4df3 | 431 | |
278c4662 NB |
432 | if (CPP_OPTION (pfile, traditional)) |
433 | n -= 2; | |
83900997 JJ |
434 | else if (! CPP_OPTION (pfile, stdc_0_in_system_headers) |
435 | || CPP_OPTION (pfile, std)) | |
ccfc4c91 | 436 | n--; |
278c4662 | 437 | |
83900997 | 438 | for (b = builtin_array; b < builtin_array + n; b++) |
6de1e2a9 | 439 | { |
f24a153a ZW |
440 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
441 | hp->type = NT_MACRO; | |
c047ce93 SB |
442 | hp->flags |= NODE_BUILTIN; |
443 | if (b->always_warn_if_redefined | |
444 | || CPP_OPTION (pfile, warn_builtin_macro_redefined)) | |
445 | hp->flags |= NODE_WARN; | |
7e5487a2 | 446 | hp->value.builtin = (enum cpp_builtin_type) b->value; |
6de1e2a9 | 447 | } |
ccfc4c91 OW |
448 | } |
449 | ||
450 | /* Read the builtins table above and enter them, and language-specific | |
451 | macros, into the hash table. HOSTED is true if this is a hosted | |
452 | environment. */ | |
453 | void | |
454 | cpp_init_builtins (cpp_reader *pfile, int hosted) | |
455 | { | |
456 | cpp_init_special_builtins (pfile); | |
457 | ||
458 | if (!CPP_OPTION (pfile, traditional) | |
459 | && (! CPP_OPTION (pfile, stdc_0_in_system_headers) | |
460 | || CPP_OPTION (pfile, std))) | |
461 | _cpp_define_builtin (pfile, "__STDC__ 1"); | |
c740cee2 NB |
462 | |
463 | if (CPP_OPTION (pfile, cplusplus)) | |
32fe396e | 464 | _cpp_define_builtin (pfile, "__cplusplus 199711L"); |
2a1dc0d8 ZW |
465 | else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
466 | _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); | |
0f7866e7 | 467 | else if (CPP_OPTION (pfile, lang) == CLK_STDC94) |
c740cee2 | 468 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); |
2778d766 JM |
469 | else if (CPP_OPTION (pfile, lang) == CLK_STDC1X |
470 | || CPP_OPTION (pfile, lang) == CLK_GNUC1X) | |
471 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 201000L"); | |
c740cee2 NB |
472 | else if (CPP_OPTION (pfile, c99)) |
473 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); | |
474 | ||
a48e3dd1 JM |
475 | if (CPP_OPTION (pfile, uliterals) |
476 | && !CPP_OPTION (pfile, cplusplus)) | |
477 | { | |
478 | _cpp_define_builtin (pfile, "__STDC_UTF_16__ 1"); | |
479 | _cpp_define_builtin (pfile, "__STDC_UTF_32__ 1"); | |
480 | } | |
481 | ||
6e270179 | 482 | if (hosted) |
58b5b894 | 483 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1"); |
6e270179 | 484 | else |
58b5b894 | 485 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0"); |
6e270179 | 486 | |
0f7866e7 ZL |
487 | if (CPP_OPTION (pfile, objc)) |
488 | _cpp_define_builtin (pfile, "__OBJC__ 1"); | |
4a58aab6 NB |
489 | } |
490 | ||
2443d4e1 NB |
491 | /* Sanity-checks are dependent on command-line options, so it is |
492 | called as a subroutine of cpp_read_main_file (). */ | |
493 | #if ENABLE_CHECKING | |
6cf87ca4 ZW |
494 | static void sanity_checks (cpp_reader *); |
495 | static void sanity_checks (cpp_reader *pfile) | |
2443d4e1 NB |
496 | { |
497 | cppchar_t test = 0; | |
c9220e3a | 498 | size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); |
2443d4e1 NB |
499 | |
500 | /* Sanity checks for assumptions about CPP arithmetic and target | |
501 | type precisions made by cpplib. */ | |
502 | test--; | |
503 | if (test < 1) | |
0527bc4e | 504 | cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type"); |
2443d4e1 | 505 | |
c9220e3a | 506 | if (CPP_OPTION (pfile, precision) > max_precision) |
0527bc4e | 507 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
508 | "preprocessor arithmetic has maximum precision of %lu bits;" |
509 | " target requires %lu bits", | |
c9220e3a NB |
510 | (unsigned long) max_precision, |
511 | (unsigned long) CPP_OPTION (pfile, precision)); | |
2443d4e1 NB |
512 | |
513 | if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) | |
0527bc4e | 514 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
515 | "CPP arithmetic must be at least as precise as a target int"); |
516 | ||
517 | if (CPP_OPTION (pfile, char_precision) < 8) | |
0527bc4e | 518 | cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide"); |
2443d4e1 NB |
519 | |
520 | if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 521 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
522 | "target wchar_t is narrower than target char"); |
523 | ||
524 | if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 525 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
526 | "target int is narrower than target char"); |
527 | ||
c9220e3a NB |
528 | /* This is assumed in eval_token() and could be fixed if necessary. */ |
529 | if (sizeof (cppchar_t) > sizeof (cpp_num_part)) | |
0527bc4e JDA |
530 | cpp_error (pfile, CPP_DL_ICE, |
531 | "CPP half-integer narrower than CPP character"); | |
c9220e3a | 532 | |
2443d4e1 | 533 | if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) |
0527bc4e | 534 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
535 | "CPP on this host cannot handle wide character constants over" |
536 | " %lu bits, but the target requires %lu bits", | |
c9220e3a NB |
537 | (unsigned long) BITS_PER_CPPCHAR_T, |
538 | (unsigned long) CPP_OPTION (pfile, wchar_precision)); | |
2443d4e1 NB |
539 | } |
540 | #else | |
541 | # define sanity_checks(PFILE) | |
542 | #endif | |
543 | ||
f5e99456 | 544 | /* This is called after options have been parsed, and partially |
59e4e217 | 545 | processed. */ |
4169c321 PB |
546 | void |
547 | cpp_post_options (cpp_reader *pfile) | |
6de1e2a9 | 548 | { |
3d8b2a98 ILT |
549 | int flags; |
550 | ||
2443d4e1 NB |
551 | sanity_checks (pfile); |
552 | ||
f4ff5a69 NB |
553 | post_options (pfile); |
554 | ||
c19b12cb | 555 | /* Mark named operators before handling command line macros. */ |
3d8b2a98 | 556 | flags = 0; |
c19b12cb | 557 | if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) |
3d8b2a98 ILT |
558 | flags |= NODE_OPERATOR; |
559 | if (CPP_OPTION (pfile, warn_cxx_operator_names)) | |
560 | flags |= NODE_DIAGNOSTIC | NODE_WARN_OPERATOR; | |
561 | if (flags != 0) | |
562 | mark_named_operators (pfile, flags); | |
4169c321 | 563 | } |
c19b12cb | 564 | |
4dc299fb | 565 | /* Setup for processing input from the file named FNAME, or stdin if |
8e9ea4d7 PB |
566 | it is the empty string. Return the original filename |
567 | on success (e.g. foo.i->foo.c), or NULL on failure. */ | |
568 | const char * | |
569 | cpp_read_main_file (cpp_reader *pfile, const char *fname) | |
4169c321 | 570 | { |
f4ff5a69 NB |
571 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
572 | { | |
573 | if (!pfile->deps) | |
574 | pfile->deps = deps_init (); | |
575 | ||
576 | /* Set the default target (if there is none already). */ | |
577 | deps_add_default_target (pfile->deps, fname); | |
578 | } | |
96302433 | 579 | |
4dc299fb | 580 | pfile->main_file |
6568f34b | 581 | = _cpp_find_file (pfile, fname, &pfile->no_search_path, false, 0); |
4dc299fb | 582 | if (_cpp_find_failed (pfile->main_file)) |
3092d0fc | 583 | return NULL; |
f5e99456 | 584 | |
4dc299fb PB |
585 | _cpp_stack_file (pfile, pfile->main_file, false); |
586 | ||
587 | /* For foo.i, read the original filename foo.c now, for the benefit | |
588 | of the front ends. */ | |
589 | if (CPP_OPTION (pfile, preprocessed)) | |
8e9ea4d7 PB |
590 | { |
591 | read_original_filename (pfile); | |
46427374 TT |
592 | fname = |
593 | ORDINARY_MAP_FILE_NAME | |
594 | ((LINEMAPS_LAST_ORDINARY_MAP (pfile->line_table))); | |
8e9ea4d7 PB |
595 | } |
596 | return fname; | |
f5e99456 NB |
597 | } |
598 | ||
599 | /* For preprocessed files, if the first tokens are of the form # NUM. | |
600 | handle the directive so we know the original file name. This will | |
601 | generate file_change callbacks, which the front ends must handle | |
602 | appropriately given their state of initialization. */ | |
603 | static void | |
6cf87ca4 | 604 | read_original_filename (cpp_reader *pfile) |
f5e99456 NB |
605 | { |
606 | const cpp_token *token, *token1; | |
607 | ||
608 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
609 | process the directive, otherwise back up. */ | |
610 | token = _cpp_lex_direct (pfile); | |
611 | if (token->type == CPP_HASH) | |
612 | { | |
456b8ce5 | 613 | pfile->state.in_directive = 1; |
f5e99456 NB |
614 | token1 = _cpp_lex_direct (pfile); |
615 | _cpp_backup_tokens (pfile, 1); | |
456b8ce5 | 616 | pfile->state.in_directive = 0; |
f5e99456 NB |
617 | |
618 | /* If it's a #line directive, handle it. */ | |
709d7160 JJ |
619 | if (token1->type == CPP_NUMBER |
620 | && _cpp_handle_directive (pfile, token->flags & PREV_WHITE)) | |
f5e99456 | 621 | { |
b20d9f0c | 622 | read_original_directory (pfile); |
f5e99456 NB |
623 | return; |
624 | } | |
625 | } | |
626 | ||
627 | /* Backup as if nothing happened. */ | |
628 | _cpp_backup_tokens (pfile, 1); | |
629 | } | |
630 | ||
b20d9f0c AO |
631 | /* For preprocessed files, if the tokens following the first filename |
632 | line is of the form # <line> "/path/name//", handle the | |
633 | directive so we know the original current directory. */ | |
634 | static void | |
635 | read_original_directory (cpp_reader *pfile) | |
636 | { | |
637 | const cpp_token *hash, *token; | |
638 | ||
639 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
640 | process the directive, otherwise back up. */ | |
641 | hash = _cpp_lex_direct (pfile); | |
642 | if (hash->type != CPP_HASH) | |
643 | { | |
644 | _cpp_backup_tokens (pfile, 1); | |
645 | return; | |
646 | } | |
647 | ||
648 | token = _cpp_lex_direct (pfile); | |
649 | ||
650 | if (token->type != CPP_NUMBER) | |
651 | { | |
652 | _cpp_backup_tokens (pfile, 2); | |
653 | return; | |
654 | } | |
655 | ||
656 | token = _cpp_lex_direct (pfile); | |
657 | ||
658 | if (token->type != CPP_STRING | |
659 | || ! (token->val.str.len >= 5 | |
4489800d KT |
660 | && IS_DIR_SEPARATOR (token->val.str.text[token->val.str.len-2]) |
661 | && IS_DIR_SEPARATOR (token->val.str.text[token->val.str.len-3]))) | |
b20d9f0c AO |
662 | { |
663 | _cpp_backup_tokens (pfile, 3); | |
664 | return; | |
665 | } | |
666 | ||
667 | if (pfile->cb.dir_change) | |
668 | { | |
c3f829c1 | 669 | char *debugdir = (char *) alloca (token->val.str.len - 3); |
b20d9f0c AO |
670 | |
671 | memcpy (debugdir, (const char *) token->val.str.text + 1, | |
672 | token->val.str.len - 4); | |
673 | debugdir[token->val.str.len - 4] = '\0'; | |
674 | ||
675 | pfile->cb.dir_change (pfile, debugdir); | |
8e9ea4d7 | 676 | } |
b20d9f0c AO |
677 | } |
678 | ||
76c3e73e | 679 | /* This is called at the end of preprocessing. It pops the last |
148e4216 | 680 | buffer and writes dependency output. |
16dd5cfe | 681 | |
76c3e73e NB |
682 | Maybe it should also reset state, such that you could call |
683 | cpp_start_read with a new filename to restart processing. */ | |
148e4216 | 684 | void |
6cf87ca4 | 685 | cpp_finish (cpp_reader *pfile, FILE *deps_stream) |
6de1e2a9 | 686 | { |
a69cbaac NB |
687 | /* Warn about unused macros before popping the final buffer. */ |
688 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
689 | cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); | |
690 | ||
a2566ae9 | 691 | /* lex.c leaves the final buffer on the stack. This it so that |
7364fdd8 | 692 | it returns an unending stream of CPP_EOFs to the client. If we |
a1f300c0 | 693 | popped the buffer, we'd dereference a NULL buffer pointer and |
7364fdd8 NB |
694 | segfault. It's nice to allow the client to do worry-free excess |
695 | cpp_get_token calls. */ | |
696 | while (pfile->buffer) | |
697 | _cpp_pop_buffer (pfile); | |
c1212d2f | 698 | |
f4ff5a69 | 699 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE |
148e4216 | 700 | && deps_stream) |
76c3e73e NB |
701 | { |
702 | deps_write (pfile->deps, deps_stream, 72); | |
703 | ||
f4ff5a69 | 704 | if (CPP_OPTION (pfile, deps.phony_targets)) |
76c3e73e NB |
705 | deps_phony_targets (pfile->deps, deps_stream); |
706 | } | |
3caee4a8 | 707 | |
d4506961 ZW |
708 | /* Report on headers that could use multiple include guards. */ |
709 | if (CPP_OPTION (pfile, print_include_names)) | |
c71f835b | 710 | _cpp_report_missing_guards (pfile); |
6de1e2a9 ZW |
711 | } |
712 | ||
f4ff5a69 | 713 | static void |
6cf87ca4 | 714 | post_options (cpp_reader *pfile) |
96302433 NB |
715 | { |
716 | /* -Wtraditional is not useful in C++ mode. */ | |
717 | if (CPP_OPTION (pfile, cplusplus)) | |
e3339d0f | 718 | CPP_OPTION (pfile, cpp_warn_traditional) = 0; |
96302433 | 719 | |
6d4587f7 | 720 | /* Permanently disable macro expansion if we are rescanning |
43612ffb | 721 | preprocessed text. Read preprocesed source in ISO mode. */ |
6d4587f7 | 722 | if (CPP_OPTION (pfile, preprocessed)) |
43612ffb | 723 | { |
ccfc4c91 OW |
724 | if (!CPP_OPTION (pfile, directives_only)) |
725 | pfile->state.prevent_expansion = 1; | |
43612ffb NB |
726 | CPP_OPTION (pfile, traditional) = 0; |
727 | } | |
728 | ||
a8eb6044 NB |
729 | if (CPP_OPTION (pfile, warn_trigraphs) == 2) |
730 | CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs); | |
731 | ||
43612ffb | 732 | if (CPP_OPTION (pfile, traditional)) |
26aea073 | 733 | { |
a09d4744 NB |
734 | CPP_OPTION (pfile, cplusplus_comments) = 0; |
735 | ||
26aea073 NB |
736 | CPP_OPTION (pfile, trigraphs) = 0; |
737 | CPP_OPTION (pfile, warn_trigraphs) = 0; | |
738 | } | |
7ca3d2b1 | 739 | } |