]>
Commit | Line | Data |
---|---|---|
a852e3b1 | 1 | /* CPP Library. |
00059bc7 | 2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
e69f4d0e | 3 | 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
a852e3b1 | 4 | Contributed by Per Bothner, 1994-95. |
5 | Based on CCCP program by Paul Rubin, June 1986 | |
6 | Adapted to ANSI C, Richard Stallman, Jan 1987 | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by the | |
10 | Free Software Foundation; either version 2, or (at your option) any | |
11 | later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
a852e3b1 | 22 | #include "config.h" |
23 | #include "system.h" | |
805e22b2 | 24 | #include "coretypes.h" |
25 | #include "tm.h" | |
6d71dc85 | 26 | #include "cpplib.h" |
27 | #include "cpphash.h" | |
62adb1fe | 28 | #include "mkdeps.h" |
1e8b9746 | 29 | |
c77d825d | 30 | static void init_library PARAMS ((void)); |
df64d85e | 31 | static void mark_named_operators PARAMS ((cpp_reader *)); |
9ceb1c29 | 32 | static void read_original_filename PARAMS ((cpp_reader *)); |
61191376 | 33 | static void post_options PARAMS ((cpp_reader *)); |
6d71dc85 | 34 | |
b3954366 | 35 | /* If we have designated initializers (GCC >2.7) these tables can be |
36 | initialized, constant data. Otherwise, they have to be filled in at | |
e057cf7c | 37 | runtime. */ |
b3954366 | 38 | #if HAVE_DESIGNATED_INITIALIZERS |
5ba37007 | 39 | |
8d1752de | 40 | #define init_trigraph_map() /* Nothing. */ |
b3954366 | 41 | #define TRIGRAPH_MAP \ |
b6d18b0a | 42 | __extension__ const uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { |
b3954366 | 43 | |
5ba37007 | 44 | #define END }; |
4f98874d | 45 | #define s(p, v) [p] = v, |
b3954366 | 46 | |
5ba37007 | 47 | #else |
b3954366 | 48 | |
b6d18b0a | 49 | #define TRIGRAPH_MAP uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \ |
b3954366 | 50 | static void init_trigraph_map PARAMS ((void)) { \ |
51 | unsigned char *x = _cpp_trigraph_map; | |
52 | ||
2ff3ad1d | 53 | #define END } |
4f98874d | 54 | #define s(p, v) x[p] = v; |
b3954366 | 55 | |
5ba37007 | 56 | #endif |
6d71dc85 | 57 | |
b3954366 | 58 | TRIGRAPH_MAP |
59 | s('=', '#') s(')', ']') s('!', '|') | |
60 | s('(', '[') s('\'', '^') s('>', '}') | |
61 | s('/', '\\') s('<', '{') s('-', '~') | |
62 | END | |
63 | ||
5ba37007 | 64 | #undef s |
4f98874d | 65 | #undef END |
b3954366 | 66 | #undef TRIGRAPH_MAP |
6d71dc85 | 67 | |
e484a1cc | 68 | /* A set of booleans indicating what CPP features each source language |
69 | requires. */ | |
f48efcc3 | 70 | struct lang_flags |
71 | { | |
72 | char c99; | |
f48efcc3 | 73 | char cplusplus; |
74 | char extended_numbers; | |
ed909a09 | 75 | char std; |
f48efcc3 | 76 | char dollars_in_ident; |
77 | char cplusplus_comments; | |
78 | char digraphs; | |
79 | }; | |
80 | ||
81 | /* ??? Enable $ in identifiers in assembly? */ | |
82 | static const struct lang_flags lang_defaults[] = | |
ed909a09 | 83 | { /* c99 c++ xnum std dollar c++comm digr */ |
9f3643d1 | 84 | /* GNUC89 */ { 0, 0, 1, 0, 1, 1, 1 }, |
85 | /* GNUC99 */ { 1, 0, 1, 0, 1, 1, 1 }, | |
86 | /* STDC89 */ { 0, 0, 0, 1, 0, 0, 0 }, | |
87 | /* STDC94 */ { 0, 0, 0, 1, 0, 0, 1 }, | |
88 | /* STDC99 */ { 1, 0, 1, 1, 0, 1, 1 }, | |
89 | /* GNUCXX */ { 0, 1, 1, 0, 1, 1, 1 }, | |
90 | /* CXX98 */ { 0, 1, 1, 1, 0, 1, 1 }, | |
91 | /* ASM */ { 0, 0, 1, 0, 0, 1, 0 } | |
f48efcc3 | 92 | }; |
93 | ||
e484a1cc | 94 | /* Sets internal flags correctly for a given language. */ |
3ae4c9f3 | 95 | void |
96 | cpp_set_lang (pfile, lang) | |
fad0ffbb | 97 | cpp_reader *pfile; |
98 | enum c_lang lang; | |
99 | { | |
f48efcc3 | 100 | const struct lang_flags *l = &lang_defaults[(int) lang]; |
b1a9ff83 | 101 | |
5db5d057 | 102 | CPP_OPTION (pfile, lang) = lang; |
fad0ffbb | 103 | |
f48efcc3 | 104 | CPP_OPTION (pfile, c99) = l->c99; |
f48efcc3 | 105 | CPP_OPTION (pfile, cplusplus) = l->cplusplus; |
106 | CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; | |
ed909a09 | 107 | CPP_OPTION (pfile, std) = l->std; |
108 | CPP_OPTION (pfile, trigraphs) = l->std; | |
f48efcc3 | 109 | CPP_OPTION (pfile, dollars_in_ident) = l->dollars_in_ident; |
110 | CPP_OPTION (pfile, cplusplus_comments) = l->cplusplus_comments; | |
111 | CPP_OPTION (pfile, digraphs) = l->digraphs; | |
fad0ffbb | 112 | } |
113 | ||
fc3c7720 | 114 | /* Initialize library global state. */ |
9751c00e | 115 | static void |
c77d825d | 116 | init_library () |
9751c00e | 117 | { |
b3a8144e | 118 | static int initialized = 0; |
119 | ||
120 | if (! initialized) | |
121 | { | |
122 | initialized = 1; | |
123 | ||
b3a8144e | 124 | /* Set up the trigraph map. This doesn't need to do anything if |
125 | we were compiled with a compiler that supports C99 designated | |
126 | initializers. */ | |
127 | init_trigraph_map (); | |
128 | } | |
9751c00e | 129 | } |
130 | ||
2c0e001b | 131 | /* Initialize a cpp_reader structure. */ |
9751c00e | 132 | cpp_reader * |
568139e4 | 133 | cpp_create_reader (lang, table) |
fad0ffbb | 134 | enum c_lang lang; |
568139e4 | 135 | hash_table *table; |
6d71dc85 | 136 | { |
b3a8144e | 137 | cpp_reader *pfile; |
79bd622b | 138 | |
457275b6 | 139 | /* Initialize this instance of the library if it hasn't been already. */ |
c77d825d | 140 | init_library (); |
b3a8144e | 141 | |
142 | pfile = (cpp_reader *) xcalloc (1, sizeof (cpp_reader)); | |
79bd622b | 143 | |
3ae4c9f3 | 144 | cpp_set_lang (pfile, lang); |
2ff3ad1d | 145 | CPP_OPTION (pfile, warn_import) = 1; |
318fdd81 | 146 | CPP_OPTION (pfile, warn_multichar) = 1; |
2ff3ad1d | 147 | CPP_OPTION (pfile, discard_comments) = 1; |
d3f7919d | 148 | CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; |
2ff3ad1d | 149 | CPP_OPTION (pfile, show_column) = 1; |
3b304865 | 150 | CPP_OPTION (pfile, tabstop) = 8; |
624a7570 | 151 | CPP_OPTION (pfile, operator_names) = 1; |
923acdd5 | 152 | CPP_OPTION (pfile, warn_endif_labels) = 1; |
922df727 | 153 | CPP_OPTION (pfile, warn_deprecated) = 1; |
61191376 | 154 | CPP_OPTION (pfile, warn_long_long) = !CPP_OPTION (pfile, c99); |
2ff3ad1d | 155 | |
1893c11a | 156 | /* Default CPP arithmetic to something sensible for the host for the |
157 | benefit of dumb users like fix-header. */ | |
dc0b244f | 158 | CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); |
1893c11a | 159 | CPP_OPTION (pfile, char_precision) = CHAR_BIT; |
160 | CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); | |
161 | CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); | |
965e9876 | 162 | CPP_OPTION (pfile, unsigned_char) = 0; |
d932f956 | 163 | CPP_OPTION (pfile, unsigned_wchar) = 1; |
13c457e1 | 164 | |
457275b6 | 165 | /* Initialize the line map. Start at logical line 1, so we can use |
729d2022 | 166 | a line number of zero for special states. */ |
38692459 | 167 | init_line_maps (&pfile->line_maps); |
168 | ||
8d1752de | 169 | /* Initialize lexer state. */ |
79bd622b | 170 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
171 | ||
f9b5f742 | 172 | /* Set up static tokens. */ |
f9b5f742 | 173 | pfile->avoid_paste.type = CPP_PADDING; |
174 | pfile->avoid_paste.val.source = NULL; | |
175 | pfile->eof.type = CPP_EOF; | |
176 | pfile->eof.flags = 0; | |
79bd622b | 177 | |
83dcbb5c | 178 | /* Create a token buffer for the lexer. */ |
179 | _cpp_init_tokenrun (&pfile->base_run, 250); | |
180 | pfile->cur_run = &pfile->base_run; | |
181 | pfile->cur_token = pfile->base_run.base; | |
83dcbb5c | 182 | |
457275b6 | 183 | /* Initialize the base context. */ |
79bd622b | 184 | pfile->context = &pfile->base_context; |
185 | pfile->base_context.macro = 0; | |
186 | pfile->base_context.prev = pfile->base_context.next = 0; | |
187 | ||
e6a5f963 | 188 | /* Aligned and unaligned storage. */ |
189 | pfile->a_buff = _cpp_get_buff (pfile, 0); | |
1fdf6039 | 190 | pfile->u_buff = _cpp_get_buff (pfile, 0); |
79bd622b | 191 | |
5bbf045f | 192 | /* The expression parser stack. */ |
193 | _cpp_expand_op_stack (pfile); | |
194 | ||
457275b6 | 195 | /* Initialize the buffer obstack. */ |
0d086e18 | 196 | gcc_obstack_init (&pfile->buffer_ob); |
197 | ||
f51c2148 | 198 | _cpp_init_includes (pfile); |
9751c00e | 199 | |
568139e4 | 200 | _cpp_init_hashtable (pfile, table); |
201 | ||
9751c00e | 202 | return pfile; |
e2f9a79f | 203 | } |
204 | ||
9bd97637 | 205 | /* Free resources used by PFILE. Accessing PFILE after this function |
974e2c0c | 206 | returns leads to undefined behavior. Returns the error count. */ |
6019c708 | 207 | void |
9bd97637 | 208 | cpp_destroy (pfile) |
6d71dc85 | 209 | cpp_reader *pfile; |
210 | { | |
79bd622b | 211 | cpp_context *context, *contextn; |
729d2022 | 212 | tokenrun *run, *runn; |
11d10d3f | 213 | |
5bbf045f | 214 | free (pfile->op_stack); |
02516fb9 | 215 | |
5b201908 | 216 | while (CPP_BUFFER (pfile) != NULL) |
4dfe8b74 | 217 | _cpp_pop_buffer (pfile); |
6d71dc85 | 218 | |
fb83e0d6 | 219 | if (pfile->out.base) |
220 | free (pfile->out.base); | |
0bb65704 | 221 | |
79bd622b | 222 | if (pfile->macro_buffer) |
8744fb7e | 223 | { |
224 | free ((PTR) pfile->macro_buffer); | |
225 | pfile->macro_buffer = NULL; | |
226 | pfile->macro_buffer_len = 0; | |
227 | } | |
79bd622b | 228 | |
61191376 | 229 | if (pfile->deps) |
230 | deps_free (pfile->deps); | |
0d086e18 | 231 | obstack_free (&pfile->buffer_ob, 0); |
62adb1fe | 232 | |
0d086e18 | 233 | _cpp_destroy_hashtable (pfile); |
76faa4c0 | 234 | _cpp_cleanup_includes (pfile); |
11d10d3f | 235 | |
e6a5f963 | 236 | _cpp_free_buff (pfile->a_buff); |
1fdf6039 | 237 | _cpp_free_buff (pfile->u_buff); |
06c92cbc | 238 | _cpp_free_buff (pfile->free_buffs); |
79bd622b | 239 | |
729d2022 | 240 | for (run = &pfile->base_run; run; run = runn) |
241 | { | |
242 | runn = run->next; | |
243 | free (run->base); | |
244 | if (run != &pfile->base_run) | |
245 | free (run); | |
246 | } | |
247 | ||
79bd622b | 248 | for (context = pfile->base_context.next; context; context = contextn) |
249 | { | |
250 | contextn = context->next; | |
251 | free (context); | |
252 | } | |
9bd97637 | 253 | |
38692459 | 254 | free_line_maps (&pfile->line_maps); |
9bd97637 | 255 | free (pfile); |
6d71dc85 | 256 | } |
257 | ||
79bd622b | 258 | /* This structure defines one built-in identifier. A node will be |
06579c95 | 259 | entered in the hash table under the name NAME, with value VALUE. |
260 | ||
261 | There are two tables of these. builtin_array holds all the | |
262 | "builtin" macros: these are handled by builtin_macro() in | |
263 | cppmacro.c. Builtin is somewhat of a misnomer -- the property of | |
264 | interest is that these macros require special code to compute their | |
265 | expansions. The value is a "builtin_type" enumerator. | |
266 | ||
267 | operator_array holds the C++ named operators. These are keywords | |
268 | which act as aliases for punctuators. In C++, they cannot be | |
269 | altered through #define, and #if recognizes them as operators. In | |
270 | C, these are not entered into the hash table at all (but see | |
271 | <iso646.h>). The value is a token-type enumerator. */ | |
5ba37007 | 272 | struct builtin |
273 | { | |
b6d18b0a | 274 | const uchar *name; |
79bd622b | 275 | unsigned short len; |
06579c95 | 276 | unsigned short value; |
5ba37007 | 277 | }; |
79bd622b | 278 | |
06579c95 | 279 | #define B(n, t) { DSC(n), t } |
5ba37007 | 280 | static const struct builtin builtin_array[] = |
6d71dc85 | 281 | { |
79bd622b | 282 | B("__TIME__", BT_TIME), |
283 | B("__DATE__", BT_DATE), | |
284 | B("__FILE__", BT_FILE), | |
285 | B("__BASE_FILE__", BT_BASE_FILE), | |
286 | B("__LINE__", BT_SPECLINE), | |
287 | B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL), | |
9c343313 | 288 | /* Keep builtins not used for -traditional-cpp at the end, and |
289 | update init_builtins() if any more are added. */ | |
c7e5d924 | 290 | B("_Pragma", BT_PRAGMA), |
31ca26b1 | 291 | B("__STDC__", BT_STDC), |
06579c95 | 292 | }; |
31674461 | 293 | |
06579c95 | 294 | static const struct builtin operator_array[] = |
295 | { | |
296 | B("and", CPP_AND_AND), | |
297 | B("and_eq", CPP_AND_EQ), | |
298 | B("bitand", CPP_AND), | |
299 | B("bitor", CPP_OR), | |
300 | B("compl", CPP_COMPL), | |
301 | B("not", CPP_NOT), | |
302 | B("not_eq", CPP_NOT_EQ), | |
303 | B("or", CPP_OR_OR), | |
304 | B("or_eq", CPP_OR_EQ), | |
305 | B("xor", CPP_XOR), | |
306 | B("xor_eq", CPP_XOR_EQ) | |
5ba37007 | 307 | }; |
e057cf7c | 308 | #undef B |
5ba37007 | 309 | |
df64d85e | 310 | /* Mark the C++ named operators in the hash table. */ |
311 | static void | |
312 | mark_named_operators (pfile) | |
313 | cpp_reader *pfile; | |
314 | { | |
315 | const struct builtin *b; | |
316 | ||
317 | for (b = operator_array; | |
318 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
319 | b++) | |
320 | { | |
321 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
322 | hp->flags |= NODE_OPERATOR; | |
805e22b2 | 323 | hp->is_directive = 0; |
324 | hp->directive_index = b->value; | |
df64d85e | 325 | } |
326 | } | |
327 | ||
fc3c7720 | 328 | /* Read the builtins table above and enter them, and language-specific |
329 | macros, into the hash table. */ | |
330 | void | |
331 | cpp_init_builtins (pfile) | |
5ba37007 | 332 | cpp_reader *pfile; |
333 | { | |
5ba37007 | 334 | const struct builtin *b; |
9c343313 | 335 | size_t n = ARRAY_SIZE (builtin_array); |
4e464091 | 336 | |
9c343313 | 337 | if (CPP_OPTION (pfile, traditional)) |
338 | n -= 2; | |
339 | ||
340 | for(b = builtin_array; b < builtin_array + n; b++) | |
6d71dc85 | 341 | { |
06579c95 | 342 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
343 | hp->type = NT_MACRO; | |
344 | hp->flags |= NODE_BUILTIN | NODE_WARN; | |
345 | hp->value.builtin = b->value; | |
6d71dc85 | 346 | } |
eef6c20f | 347 | |
348 | if (CPP_OPTION (pfile, cplusplus)) | |
9a85d74b | 349 | _cpp_define_builtin (pfile, "__cplusplus 1"); |
965e9876 | 350 | else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
351 | _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); | |
952e555e | 352 | else if (CPP_OPTION (pfile, lang) == CLK_STDC94) |
eef6c20f | 353 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); |
354 | else if (CPP_OPTION (pfile, c99)) | |
355 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); | |
356 | ||
952e555e | 357 | if (CPP_OPTION (pfile, objc)) |
358 | _cpp_define_builtin (pfile, "__OBJC__ 1"); | |
8d1752de | 359 | } |
360 | ||
1893c11a | 361 | /* Sanity-checks are dependent on command-line options, so it is |
362 | called as a subroutine of cpp_read_main_file (). */ | |
363 | #if ENABLE_CHECKING | |
364 | static void sanity_checks PARAMS ((cpp_reader *)); | |
365 | static void sanity_checks (pfile) | |
366 | cpp_reader *pfile; | |
367 | { | |
368 | cppchar_t test = 0; | |
dc0b244f | 369 | size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); |
1893c11a | 370 | |
371 | /* Sanity checks for assumptions about CPP arithmetic and target | |
372 | type precisions made by cpplib. */ | |
373 | test--; | |
374 | if (test < 1) | |
b9093358 | 375 | cpp_error (pfile, DL_ICE, "cppchar_t must be an unsigned type"); |
1893c11a | 376 | |
dc0b244f | 377 | if (CPP_OPTION (pfile, precision) > max_precision) |
b9093358 | 378 | cpp_error (pfile, DL_ICE, |
e4ab85e6 | 379 | "preprocessor arithmetic has maximum precision of %lu bits; target requires %lu bits", |
dc0b244f | 380 | (unsigned long) max_precision, |
381 | (unsigned long) CPP_OPTION (pfile, precision)); | |
1893c11a | 382 | |
383 | if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) | |
b9093358 | 384 | cpp_error (pfile, DL_ICE, |
1893c11a | 385 | "CPP arithmetic must be at least as precise as a target int"); |
386 | ||
387 | if (CPP_OPTION (pfile, char_precision) < 8) | |
b9093358 | 388 | cpp_error (pfile, DL_ICE, "target char is less than 8 bits wide"); |
1893c11a | 389 | |
390 | if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) | |
b9093358 | 391 | cpp_error (pfile, DL_ICE, |
1893c11a | 392 | "target wchar_t is narrower than target char"); |
393 | ||
394 | if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) | |
b9093358 | 395 | cpp_error (pfile, DL_ICE, |
1893c11a | 396 | "target int is narrower than target char"); |
397 | ||
dc0b244f | 398 | /* This is assumed in eval_token() and could be fixed if necessary. */ |
399 | if (sizeof (cppchar_t) > sizeof (cpp_num_part)) | |
400 | cpp_error (pfile, DL_ICE, "CPP half-integer narrower than CPP character"); | |
401 | ||
1893c11a | 402 | if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) |
b9093358 | 403 | cpp_error (pfile, DL_ICE, |
e4ab85e6 | 404 | "CPP on this host cannot handle wide character constants over %lu bits, but the target requires %lu bits", |
dc0b244f | 405 | (unsigned long) BITS_PER_CPPCHAR_T, |
406 | (unsigned long) CPP_OPTION (pfile, wchar_precision)); | |
1893c11a | 407 | } |
408 | #else | |
409 | # define sanity_checks(PFILE) | |
410 | #endif | |
411 | ||
6019c708 | 412 | /* Add a dependency target. Can be called any number of times before |
413 | cpp_read_main_file(). If no targets have been added before | |
414 | cpp_read_main_file(), then the default target is used. */ | |
415 | void | |
416 | cpp_add_dependency_target (pfile, target, quote) | |
417 | cpp_reader *pfile; | |
418 | const char *target; | |
419 | int quote; | |
420 | { | |
421 | if (!pfile->deps) | |
422 | pfile->deps = deps_init (); | |
423 | ||
424 | deps_add_target (pfile->deps, target, quote); | |
425 | } | |
426 | ||
9ceb1c29 | 427 | /* This is called after options have been parsed, and partially |
428 | processed. Setup for processing input from the file named FNAME, | |
429 | or stdin if it is the empty string. Return the original filename | |
430 | on success (e.g. foo.i->foo.c), or NULL on failure. */ | |
431 | const char * | |
568139e4 | 432 | cpp_read_main_file (pfile, fname) |
6d71dc85 | 433 | cpp_reader *pfile; |
8d7a2585 | 434 | const char *fname; |
6d71dc85 | 435 | { |
1893c11a | 436 | sanity_checks (pfile); |
437 | ||
61191376 | 438 | post_options (pfile); |
439 | ||
9e36e267 | 440 | /* Mark named operators before handling command line macros. */ |
441 | if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) | |
442 | mark_named_operators (pfile); | |
443 | ||
61191376 | 444 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
445 | { | |
446 | if (!pfile->deps) | |
447 | pfile->deps = deps_init (); | |
448 | ||
449 | /* Set the default target (if there is none already). */ | |
450 | deps_add_default_target (pfile->deps, fname); | |
451 | } | |
af808d7d | 452 | |
9ceb1c29 | 453 | /* Open the main input file. */ |
a54e0bf8 | 454 | pfile->line = 1; |
fd944c82 | 455 | if (!_cpp_read_file (pfile, fname)) |
9ceb1c29 | 456 | return NULL; |
d2e850c1 | 457 | |
61191376 | 458 | /* Set this here so the client can change the option if it wishes, |
459 | and after stacking the main file so we don't trace the main | |
460 | file. */ | |
438ac94c | 461 | pfile->line_maps.trace_includes = CPP_OPTION (pfile, print_include_names); |
462 | ||
9ceb1c29 | 463 | /* For foo.i, read the original filename foo.c now, for the benefit |
464 | of the front ends. */ | |
465 | if (CPP_OPTION (pfile, preprocessed)) | |
466 | read_original_filename (pfile); | |
467 | ||
468 | return pfile->map->to_file; | |
469 | } | |
470 | ||
471 | /* For preprocessed files, if the first tokens are of the form # NUM. | |
472 | handle the directive so we know the original file name. This will | |
473 | generate file_change callbacks, which the front ends must handle | |
474 | appropriately given their state of initialization. */ | |
475 | static void | |
476 | read_original_filename (pfile) | |
477 | cpp_reader *pfile; | |
478 | { | |
479 | const cpp_token *token, *token1; | |
480 | ||
481 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
482 | process the directive, otherwise back up. */ | |
483 | token = _cpp_lex_direct (pfile); | |
484 | if (token->type == CPP_HASH) | |
485 | { | |
486 | token1 = _cpp_lex_direct (pfile); | |
487 | _cpp_backup_tokens (pfile, 1); | |
488 | ||
489 | /* If it's a #line directive, handle it. */ | |
490 | if (token1->type == CPP_NUMBER) | |
491 | { | |
492 | _cpp_handle_directive (pfile, token->flags & PREV_WHITE); | |
493 | return; | |
494 | } | |
495 | } | |
496 | ||
497 | /* Backup as if nothing happened. */ | |
498 | _cpp_backup_tokens (pfile, 1); | |
499 | } | |
500 | ||
6019c708 | 501 | /* This is called at the end of preprocessing. It pops the last |
502 | buffer and writes dependency output, and returns the number of | |
503 | errors. | |
504 | ||
505 | Maybe it should also reset state, such that you could call | |
506 | cpp_start_read with a new filename to restart processing. */ | |
507 | int | |
508 | cpp_finish (pfile, deps_stream) | |
6d71dc85 | 509 | cpp_reader *pfile; |
6019c708 | 510 | FILE *deps_stream; |
6d71dc85 | 511 | { |
71a7c282 | 512 | /* Warn about unused macros before popping the final buffer. */ |
513 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
514 | cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); | |
515 | ||
5475a165 | 516 | /* cpplex.c leaves the final buffer on the stack. This it so that |
517 | it returns an unending stream of CPP_EOFs to the client. If we | |
3fb1e43b | 518 | popped the buffer, we'd dereference a NULL buffer pointer and |
5475a165 | 519 | segfault. It's nice to allow the client to do worry-free excess |
520 | cpp_get_token calls. */ | |
521 | while (pfile->buffer) | |
522 | _cpp_pop_buffer (pfile); | |
9e87fa80 | 523 | |
6019c708 | 524 | /* Don't write the deps file if there are errors. */ |
61191376 | 525 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE |
526 | && deps_stream && pfile->errors == 0) | |
6019c708 | 527 | { |
528 | deps_write (pfile->deps, deps_stream, 72); | |
529 | ||
61191376 | 530 | if (CPP_OPTION (pfile, deps.phony_targets)) |
6019c708 | 531 | deps_phony_targets (pfile->deps, deps_stream); |
532 | } | |
d453a374 | 533 | |
34627970 | 534 | /* Report on headers that could use multiple include guards. */ |
535 | if (CPP_OPTION (pfile, print_include_names)) | |
f51c2148 | 536 | _cpp_report_missing_guards (pfile); |
6019c708 | 537 | |
538 | return pfile->errors; | |
6d71dc85 | 539 | } |
540 | ||
61191376 | 541 | static void |
542 | post_options (pfile) | |
af808d7d | 543 | cpp_reader *pfile; |
544 | { | |
545 | /* -Wtraditional is not useful in C++ mode. */ | |
546 | if (CPP_OPTION (pfile, cplusplus)) | |
547 | CPP_OPTION (pfile, warn_traditional) = 0; | |
548 | ||
946ce1b7 | 549 | /* Permanently disable macro expansion if we are rescanning |
ca52ef60 | 550 | preprocessed text. Read preprocesed source in ISO mode. */ |
946ce1b7 | 551 | if (CPP_OPTION (pfile, preprocessed)) |
ca52ef60 | 552 | { |
553 | pfile->state.prevent_expansion = 1; | |
554 | CPP_OPTION (pfile, traditional) = 0; | |
555 | } | |
556 | ||
ca52ef60 | 557 | if (CPP_OPTION (pfile, traditional)) |
a54e0bf8 | 558 | { |
559 | /* Traditional CPP does not accurately track column information. */ | |
560 | CPP_OPTION (pfile, show_column) = 0; | |
561 | CPP_OPTION (pfile, trigraphs) = 0; | |
562 | CPP_OPTION (pfile, warn_trigraphs) = 0; | |
563 | } | |
b3a8144e | 564 | } |