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5538ada6 | 1 | /* CPP Library. |
8d9254fc | 2 | Copyright (C) 1986-2020 Free Software Foundation, Inc. |
5538ada6 ZW |
3 | Contributed by Per Bothner, 1994-95. |
4 | Based on CCCP program by Paul Rubin, June 1986 | |
5 | Adapted to ANSI C, Richard Stallman, Jan 1987 | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU General Public License as published by the | |
748086b7 | 9 | Free Software Foundation; either version 3, or (at your option) any |
5538ada6 ZW |
10 | later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
748086b7 JJ |
18 | along with this program; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
5538ada6 | 20 | |
5538ada6 ZW |
21 | #include "config.h" |
22 | #include "system.h" | |
6de1e2a9 | 23 | #include "cpplib.h" |
4f4e53dd | 24 | #include "internal.h" |
49e6c08e | 25 | #include "mkdeps.h" |
018a4785 | 26 | #include "localedir.h" |
4489800d | 27 | #include "filenames.h" |
88ae23e7 | 28 | |
5dc99c46 | 29 | #ifndef ENABLE_CANONICAL_SYSTEM_HEADERS |
eac3e079 JY |
30 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
31 | #define ENABLE_CANONICAL_SYSTEM_HEADERS 1 | |
32 | #else | |
5dc99c46 SB |
33 | #define ENABLE_CANONICAL_SYSTEM_HEADERS 0 |
34 | #endif | |
eac3e079 | 35 | #endif |
5dc99c46 | 36 | |
6cf87ca4 | 37 | static void init_library (void); |
3d8b2a98 | 38 | static void mark_named_operators (cpp_reader *, int); |
d1c566d7 | 39 | static bool read_original_filename (cpp_reader *); |
b20d9f0c | 40 | static void read_original_directory (cpp_reader *); |
6cf87ca4 | 41 | static void post_options (cpp_reader *); |
6de1e2a9 | 42 | |
61d0346d NB |
43 | /* If we have designated initializers (GCC >2.7) these tables can be |
44 | initialized, constant data. Otherwise, they have to be filled in at | |
12cf91fe | 45 | runtime. */ |
61d0346d | 46 | #if HAVE_DESIGNATED_INITIALIZERS |
a9ae4483 | 47 | |
4a58aab6 | 48 | #define init_trigraph_map() /* Nothing. */ |
61d0346d | 49 | #define TRIGRAPH_MAP \ |
562a5c27 | 50 | __extension__ const uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { |
61d0346d | 51 | |
a9ae4483 | 52 | #define END }; |
455d2586 | 53 | #define s(p, v) [p] = v, |
61d0346d | 54 | |
a9ae4483 | 55 | #else |
61d0346d | 56 | |
562a5c27 | 57 | #define TRIGRAPH_MAP uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \ |
6cf87ca4 | 58 | static void init_trigraph_map (void) { \ |
61d0346d NB |
59 | unsigned char *x = _cpp_trigraph_map; |
60 | ||
ae79697b | 61 | #define END } |
455d2586 | 62 | #define s(p, v) x[p] = v; |
61d0346d | 63 | |
a9ae4483 | 64 | #endif |
6de1e2a9 | 65 | |
61d0346d NB |
66 | TRIGRAPH_MAP |
67 | s('=', '#') s(')', ']') s('!', '|') | |
68 | s('(', '[') s('\'', '^') s('>', '}') | |
69 | s('/', '\\') s('<', '{') s('-', '~') | |
70 | END | |
71 | ||
a9ae4483 | 72 | #undef s |
455d2586 | 73 | #undef END |
61d0346d | 74 | #undef TRIGRAPH_MAP |
6de1e2a9 | 75 | |
5d8ebbd8 NB |
76 | /* A set of booleans indicating what CPP features each source language |
77 | requires. */ | |
a01eb545 ZW |
78 | struct lang_flags |
79 | { | |
80 | char c99; | |
a01eb545 ZW |
81 | char cplusplus; |
82 | char extended_numbers; | |
af15a2fe | 83 | char extended_identifiers; |
d3f4ff8b | 84 | char c11_identifiers; |
58551c23 | 85 | char std; |
a01eb545 | 86 | char digraphs; |
b6baa67d | 87 | char uliterals; |
a48e3dd1 | 88 | char rliterals; |
3ce4f9e4 | 89 | char user_literals; |
01187df0 | 90 | char binary_constants; |
7057e645 | 91 | char digit_separators; |
e4276ba5 | 92 | char trigraphs; |
fe95b036 | 93 | char utf8_char_literals; |
fb771b9d | 94 | char va_opt; |
93313b94 | 95 | char scope; |
175a85b2 | 96 | char dfp_constants; |
a01eb545 ZW |
97 | }; |
98 | ||
a01eb545 | 99 | static const struct lang_flags lang_defaults[] = |
175a85b2 JM |
100 | { /* c99 c++ xnum xid c11 std digr ulit rlit udlit bincst digsep trig u8chlit vaopt scope dfp */ |
101 | /* GNUC89 */ { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0 }, | |
102 | /* GNUC99 */ { 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0 }, | |
103 | /* GNUC11 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0 }, | |
104 | /* GNUC17 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0 }, | |
7c5890cc | 105 | /* GNUC2X */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1 }, |
175a85b2 JM |
106 | /* STDC89 */ { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 }, |
107 | /* STDC94 */ { 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 }, | |
108 | /* STDC99 */ { 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 }, | |
109 | /* STDC11 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0 }, | |
110 | /* STDC17 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0 }, | |
7c5890cc | 111 | /* STDC2X */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1 }, |
175a85b2 JM |
112 | /* GNUCXX */ { 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0 }, |
113 | /* CXX98 */ { 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0 }, | |
114 | /* GNUCXX11 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0 }, | |
115 | /* CXX11 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 1, 0 }, | |
116 | /* GNUCXX14 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0 }, | |
117 | /* CXX14 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0 }, | |
118 | /* GNUCXX17 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0 }, | |
119 | /* CXX17 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0 }, | |
b04445d4 JM |
120 | /* GNUCXX20 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0 }, |
121 | /* CXX20 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0 }, | |
175a85b2 | 122 | /* ASM */ { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } |
a01eb545 ZW |
123 | }; |
124 | ||
5d8ebbd8 | 125 | /* Sets internal flags correctly for a given language. */ |
f749a36b | 126 | void |
6cf87ca4 | 127 | cpp_set_lang (cpp_reader *pfile, enum c_lang lang) |
dd07b884 | 128 | { |
a01eb545 | 129 | const struct lang_flags *l = &lang_defaults[(int) lang]; |
df383483 | 130 | |
bdb05a7b | 131 | CPP_OPTION (pfile, lang) = lang; |
dd07b884 | 132 | |
af15a2fe JM |
133 | CPP_OPTION (pfile, c99) = l->c99; |
134 | CPP_OPTION (pfile, cplusplus) = l->cplusplus; | |
135 | CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; | |
136 | CPP_OPTION (pfile, extended_identifiers) = l->extended_identifiers; | |
d3f4ff8b | 137 | CPP_OPTION (pfile, c11_identifiers) = l->c11_identifiers; |
af15a2fe | 138 | CPP_OPTION (pfile, std) = l->std; |
af15a2fe | 139 | CPP_OPTION (pfile, digraphs) = l->digraphs; |
b6baa67d | 140 | CPP_OPTION (pfile, uliterals) = l->uliterals; |
a48e3dd1 | 141 | CPP_OPTION (pfile, rliterals) = l->rliterals; |
3ce4f9e4 | 142 | CPP_OPTION (pfile, user_literals) = l->user_literals; |
01187df0 | 143 | CPP_OPTION (pfile, binary_constants) = l->binary_constants; |
7057e645 | 144 | CPP_OPTION (pfile, digit_separators) = l->digit_separators; |
e4276ba5 | 145 | CPP_OPTION (pfile, trigraphs) = l->trigraphs; |
fe95b036 | 146 | CPP_OPTION (pfile, utf8_char_literals) = l->utf8_char_literals; |
fb771b9d | 147 | CPP_OPTION (pfile, va_opt) = l->va_opt; |
93313b94 | 148 | CPP_OPTION (pfile, scope) = l->scope; |
175a85b2 | 149 | CPP_OPTION (pfile, dfp_constants) = l->dfp_constants; |
dd07b884 NB |
150 | } |
151 | ||
c1bad961 | 152 | /* Initialize library global state. */ |
cf44ea52 | 153 | static void |
6cf87ca4 | 154 | init_library (void) |
cf44ea52 | 155 | { |
7ca3d2b1 NB |
156 | static int initialized = 0; |
157 | ||
158 | if (! initialized) | |
159 | { | |
160 | initialized = 1; | |
161 | ||
b0c084b7 JJ |
162 | _cpp_init_lexer (); |
163 | ||
7ca3d2b1 NB |
164 | /* Set up the trigraph map. This doesn't need to do anything if |
165 | we were compiled with a compiler that supports C99 designated | |
166 | initializers. */ | |
167 | init_trigraph_map (); | |
4f4e53dd PB |
168 | |
169 | #ifdef ENABLE_NLS | |
85eac2a0 | 170 | (void) bindtextdomain (PACKAGE, LOCALEDIR); |
4f4e53dd | 171 | #endif |
7ca3d2b1 | 172 | } |
cf44ea52 NB |
173 | } |
174 | ||
ec5c56db | 175 | /* Initialize a cpp_reader structure. */ |
cf44ea52 | 176 | cpp_reader * |
0823efed | 177 | cpp_create_reader (enum c_lang lang, cpp_hash_table *table, |
99b1c316 | 178 | class line_maps *line_table) |
6de1e2a9 | 179 | { |
7ca3d2b1 | 180 | cpp_reader *pfile; |
93c80368 | 181 | |
4912a07c | 182 | /* Initialize this instance of the library if it hasn't been already. */ |
674c3b40 | 183 | init_library (); |
7ca3d2b1 | 184 | |
c3f829c1 | 185 | pfile = XCNEW (cpp_reader); |
92582b75 | 186 | memset (&pfile->base_context, 0, sizeof (pfile->base_context)); |
93c80368 | 187 | |
f749a36b | 188 | cpp_set_lang (pfile, lang); |
a5a49440 | 189 | CPP_OPTION (pfile, warn_multichar) = 1; |
ae79697b | 190 | CPP_OPTION (pfile, discard_comments) = 1; |
477cdac7 | 191 | CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; |
1c6ffbab | 192 | CPP_OPTION (pfile, max_include_depth) = 200; |
be768055 | 193 | CPP_OPTION (pfile, operator_names) = 1; |
a8eb6044 | 194 | CPP_OPTION (pfile, warn_trigraphs) = 2; |
909de5da | 195 | CPP_OPTION (pfile, warn_endif_labels) = 1; |
2b71f4a4 | 196 | CPP_OPTION (pfile, cpp_warn_c90_c99_compat) = -1; |
175a85b2 | 197 | CPP_OPTION (pfile, cpp_warn_c11_c2x_compat) = -1; |
fe191308 | 198 | CPP_OPTION (pfile, cpp_warn_cxx11_compat) = 0; |
e3339d0f JM |
199 | CPP_OPTION (pfile, cpp_warn_deprecated) = 1; |
200 | CPP_OPTION (pfile, cpp_warn_long_long) = 0; | |
b1822ccc | 201 | CPP_OPTION (pfile, dollars_in_ident) = 1; |
78b8811a | 202 | CPP_OPTION (pfile, warn_dollars) = 1; |
e5b79219 | 203 | CPP_OPTION (pfile, warn_variadic_macros) = 1; |
c047ce93 | 204 | CPP_OPTION (pfile, warn_builtin_macro_redefined) = 1; |
70f6d5e1 | 205 | CPP_OPTION (pfile, cpp_warn_implicit_fallthrough) = 0; |
51fce2d3 DS |
206 | /* By default, track locations of tokens resulting from macro |
207 | expansion. The '2' means, track the locations with the highest | |
208 | accuracy. Read the comments for struct | |
209 | cpp_options::track_macro_expansion to learn about the other | |
210 | values. */ | |
211 | CPP_OPTION (pfile, track_macro_expansion) = 2; | |
50668cf6 | 212 | CPP_OPTION (pfile, warn_normalize) = normalized_C; |
7f5f5f98 | 213 | CPP_OPTION (pfile, warn_literal_suffix) = 1; |
5dc99c46 SB |
214 | CPP_OPTION (pfile, canonical_system_headers) |
215 | = ENABLE_CANONICAL_SYSTEM_HEADERS; | |
a4a0016d | 216 | CPP_OPTION (pfile, ext_numeric_literals) = 1; |
e8ff5196 | 217 | CPP_OPTION (pfile, warn_date_time) = 0; |
ae79697b | 218 | |
2443d4e1 NB |
219 | /* Default CPP arithmetic to something sensible for the host for the |
220 | benefit of dumb users like fix-header. */ | |
c9220e3a | 221 | CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); |
2443d4e1 NB |
222 | CPP_OPTION (pfile, char_precision) = CHAR_BIT; |
223 | CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); | |
224 | CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); | |
2a1dc0d8 | 225 | CPP_OPTION (pfile, unsigned_char) = 0; |
44a147ad | 226 | CPP_OPTION (pfile, unsigned_wchar) = 1; |
e6cc3a24 ZW |
227 | CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */ |
228 | ||
229 | /* Default to no charset conversion. */ | |
16dd5cfe | 230 | CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding (); |
e6cc3a24 | 231 | CPP_OPTION (pfile, wide_charset) = 0; |
4268e8bb | 232 | |
16dd5cfe EC |
233 | /* Default the input character set to UTF-8. */ |
234 | CPP_OPTION (pfile, input_charset) = _cpp_default_encoding (); | |
cf551fba | 235 | |
8f9b4009 NB |
236 | /* A fake empty "directory" used as the starting point for files |
237 | looked up without a search path. Name cannot be '/' because we | |
238 | don't want to prepend anything at all to filenames using it. All | |
239 | other entries are correct zero-initialized. */ | |
240 | pfile->no_search_path.name = (char *) ""; | |
241 | ||
500bee0a | 242 | /* Initialize the line map. */ |
50f59cd7 | 243 | pfile->line_table = line_table; |
d82fc108 | 244 | |
4a58aab6 | 245 | /* Initialize lexer state. */ |
93c80368 NB |
246 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
247 | ||
4ed5bcfb | 248 | /* Set up static tokens. */ |
4ed5bcfb NB |
249 | pfile->avoid_paste.type = CPP_PADDING; |
250 | pfile->avoid_paste.val.source = NULL; | |
5abe05b4 NS |
251 | pfile->avoid_paste.src_loc = 0; |
252 | pfile->endarg.type = CPP_EOF; | |
253 | pfile->endarg.flags = 0; | |
254 | pfile->endarg.src_loc = 0; | |
93c80368 | 255 | |
5fddcffc NB |
256 | /* Create a token buffer for the lexer. */ |
257 | _cpp_init_tokenrun (&pfile->base_run, 250); | |
258 | pfile->cur_run = &pfile->base_run; | |
259 | pfile->cur_token = pfile->base_run.base; | |
5fddcffc | 260 | |
4912a07c | 261 | /* Initialize the base context. */ |
93c80368 | 262 | pfile->context = &pfile->base_context; |
92582b75 | 263 | pfile->base_context.c.macro = 0; |
93c80368 NB |
264 | pfile->base_context.prev = pfile->base_context.next = 0; |
265 | ||
8c3b2693 NB |
266 | /* Aligned and unaligned storage. */ |
267 | pfile->a_buff = _cpp_get_buff (pfile, 0); | |
ece54d54 | 268 | pfile->u_buff = _cpp_get_buff (pfile, 0); |
93c80368 | 269 | |
17e7cb85 KT |
270 | /* Initialize table for push_macro/pop_macro. */ |
271 | pfile->pushed_macros = 0; | |
272 | ||
e3dfef44 | 273 | /* Do not force token locations by default. */ |
f3f6029d | 274 | pfile->forced_token_location = 0; |
e3dfef44 | 275 | |
15c98b2e ES |
276 | /* Initialize source_date_epoch to -2 (not yet set). */ |
277 | pfile->source_date_epoch = (time_t) -2; | |
278 | ||
87ed109f NB |
279 | /* The expression parser stack. */ |
280 | _cpp_expand_op_stack (pfile); | |
281 | ||
4912a07c | 282 | /* Initialize the buffer obstack. */ |
19a9ba64 | 283 | obstack_specify_allocation (&pfile->buffer_ob, 0, 0, xmalloc, free); |
2a967f3d | 284 | |
8f9b4009 | 285 | _cpp_init_files (pfile); |
cf44ea52 | 286 | |
b4e46cea PB |
287 | _cpp_init_hashtable (pfile, table); |
288 | ||
cf44ea52 | 289 | return pfile; |
f2d5f0cc ZW |
290 | } |
291 | ||
5ffeb913 TT |
292 | /* Set the line_table entry in PFILE. This is called after reading a |
293 | PCH file, as the old line_table will be incorrect. */ | |
294 | void | |
99b1c316 | 295 | cpp_set_line_map (cpp_reader *pfile, class line_maps *line_table) |
5ffeb913 TT |
296 | { |
297 | pfile->line_table = line_table; | |
298 | } | |
299 | ||
400023a3 | 300 | /* Free resources used by PFILE. Accessing PFILE after this function |
8d9afc4e | 301 | returns leads to undefined behavior. Returns the error count. */ |
76c3e73e | 302 | void |
6cf87ca4 | 303 | cpp_destroy (cpp_reader *pfile) |
6de1e2a9 | 304 | { |
93c80368 | 305 | cpp_context *context, *contextn; |
17e7cb85 | 306 | struct def_pragma_macro *pmacro; |
50410426 | 307 | tokenrun *run, *runn; |
631d0d36 | 308 | int i; |
709e9e50 | 309 | |
87ed109f | 310 | free (pfile->op_stack); |
af0d16cd | 311 | |
38b24ee2 | 312 | while (CPP_BUFFER (pfile) != NULL) |
ef6e958a | 313 | _cpp_pop_buffer (pfile); |
6de1e2a9 | 314 | |
04695783 | 315 | free (pfile->out.base); |
004cb263 | 316 | |
93c80368 | 317 | if (pfile->macro_buffer) |
4b49c365 | 318 | { |
fad205ff | 319 | free (pfile->macro_buffer); |
4b49c365 AO |
320 | pfile->macro_buffer = NULL; |
321 | pfile->macro_buffer_len = 0; | |
322 | } | |
93c80368 | 323 | |
f4ff5a69 NB |
324 | if (pfile->deps) |
325 | deps_free (pfile->deps); | |
2a967f3d | 326 | obstack_free (&pfile->buffer_ob, 0); |
49e6c08e | 327 | |
2a967f3d | 328 | _cpp_destroy_hashtable (pfile); |
8f9b4009 | 329 | _cpp_cleanup_files (pfile); |
e6cc3a24 | 330 | _cpp_destroy_iconv (pfile); |
709e9e50 | 331 | |
8c3b2693 | 332 | _cpp_free_buff (pfile->a_buff); |
ece54d54 | 333 | _cpp_free_buff (pfile->u_buff); |
b8af0ca5 | 334 | _cpp_free_buff (pfile->free_buffs); |
93c80368 | 335 | |
50410426 NB |
336 | for (run = &pfile->base_run; run; run = runn) |
337 | { | |
338 | runn = run->next; | |
339 | free (run->base); | |
340 | if (run != &pfile->base_run) | |
341 | free (run); | |
342 | } | |
343 | ||
93c80368 NB |
344 | for (context = pfile->base_context.next; context; context = contextn) |
345 | { | |
346 | contextn = context->next; | |
347 | free (context); | |
348 | } | |
400023a3 | 349 | |
631d0d36 MG |
350 | if (pfile->comments.entries) |
351 | { | |
352 | for (i = 0; i < pfile->comments.count; i++) | |
353 | free (pfile->comments.entries[i].comment); | |
354 | ||
355 | free (pfile->comments.entries); | |
356 | } | |
17e7cb85 KT |
357 | if (pfile->pushed_macros) |
358 | { | |
359 | do | |
360 | { | |
361 | pmacro = pfile->pushed_macros; | |
362 | pfile->pushed_macros = pmacro->next; | |
363 | free (pmacro->name); | |
364 | free (pmacro); | |
365 | } | |
366 | while (pfile->pushed_macros); | |
367 | } | |
631d0d36 | 368 | |
400023a3 | 369 | free (pfile); |
6de1e2a9 ZW |
370 | } |
371 | ||
93c80368 | 372 | /* This structure defines one built-in identifier. A node will be |
f24a153a ZW |
373 | entered in the hash table under the name NAME, with value VALUE. |
374 | ||
375 | There are two tables of these. builtin_array holds all the | |
376 | "builtin" macros: these are handled by builtin_macro() in | |
a2566ae9 | 377 | macro.c. Builtin is somewhat of a misnomer -- the property of |
f24a153a | 378 | interest is that these macros require special code to compute their |
128465e6 | 379 | expansions. The value is a "cpp_builtin_type" enumerator. |
f24a153a ZW |
380 | |
381 | operator_array holds the C++ named operators. These are keywords | |
382 | which act as aliases for punctuators. In C++, they cannot be | |
383 | altered through #define, and #if recognizes them as operators. In | |
384 | C, these are not entered into the hash table at all (but see | |
385 | <iso646.h>). The value is a token-type enumerator. */ | |
c047ce93 | 386 | struct builtin_macro |
a9ae4483 | 387 | { |
c047ce93 SB |
388 | const uchar *const name; |
389 | const unsigned short len; | |
390 | const unsigned short value; | |
391 | const bool always_warn_if_redefined; | |
a9ae4483 | 392 | }; |
93c80368 | 393 | |
c047ce93 SB |
394 | #define B(n, t, f) { DSC(n), t, f } |
395 | static const struct builtin_macro builtin_array[] = | |
6de1e2a9 | 396 | { |
c047ce93 SB |
397 | B("__TIMESTAMP__", BT_TIMESTAMP, false), |
398 | B("__TIME__", BT_TIME, false), | |
399 | B("__DATE__", BT_DATE, false), | |
400 | B("__FILE__", BT_FILE, false), | |
401 | B("__BASE_FILE__", BT_BASE_FILE, false), | |
402 | B("__LINE__", BT_SPECLINE, true), | |
403 | B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL, true), | |
404 | B("__COUNTER__", BT_COUNTER, true), | |
f6fe3bbf TM |
405 | /* Make sure to update the list of built-in |
406 | function-like macros in traditional.c: | |
407 | fun_like_macro() when adding more following */ | |
1f8d3e84 JJ |
408 | B("__has_attribute", BT_HAS_ATTRIBUTE, true), |
409 | B("__has_cpp_attribute", BT_HAS_ATTRIBUTE, true), | |
ad1539d5 | 410 | B("__has_builtin", BT_HAS_BUILTIN, true), |
3d056cbf NS |
411 | B("__has_include", BT_HAS_INCLUDE, true), |
412 | B("__has_include_next",BT_HAS_INCLUDE_NEXT, true), | |
278c4662 NB |
413 | /* Keep builtins not used for -traditional-cpp at the end, and |
414 | update init_builtins() if any more are added. */ | |
c047ce93 SB |
415 | B("_Pragma", BT_PRAGMA, true), |
416 | B("__STDC__", BT_STDC, true), | |
417 | }; | |
418 | #undef B | |
419 | ||
420 | struct builtin_operator | |
421 | { | |
422 | const uchar *const name; | |
423 | const unsigned short len; | |
424 | const unsigned short value; | |
f24a153a | 425 | }; |
92936ecf | 426 | |
c047ce93 SB |
427 | #define B(n, t) { DSC(n), t } |
428 | static const struct builtin_operator operator_array[] = | |
f24a153a ZW |
429 | { |
430 | B("and", CPP_AND_AND), | |
431 | B("and_eq", CPP_AND_EQ), | |
432 | B("bitand", CPP_AND), | |
433 | B("bitor", CPP_OR), | |
434 | B("compl", CPP_COMPL), | |
435 | B("not", CPP_NOT), | |
436 | B("not_eq", CPP_NOT_EQ), | |
437 | B("or", CPP_OR_OR), | |
438 | B("or_eq", CPP_OR_EQ), | |
439 | B("xor", CPP_XOR), | |
440 | B("xor_eq", CPP_XOR_EQ) | |
a9ae4483 | 441 | }; |
12cf91fe | 442 | #undef B |
a9ae4483 | 443 | |
17645b15 NB |
444 | /* Mark the C++ named operators in the hash table. */ |
445 | static void | |
3d8b2a98 | 446 | mark_named_operators (cpp_reader *pfile, int flags) |
17645b15 | 447 | { |
c047ce93 | 448 | const struct builtin_operator *b; |
17645b15 NB |
449 | |
450 | for (b = operator_array; | |
451 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
452 | b++) | |
453 | { | |
454 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
3d8b2a98 | 455 | hp->flags |= flags; |
4977bab6 ZW |
456 | hp->is_directive = 0; |
457 | hp->directive_index = b->value; | |
17645b15 NB |
458 | } |
459 | } | |
460 | ||
cfc93532 MLI |
461 | /* Helper function of cpp_type2name. Return the string associated with |
462 | named operator TYPE. */ | |
463 | const char * | |
464 | cpp_named_operator2name (enum cpp_ttype type) | |
465 | { | |
466 | const struct builtin_operator *b; | |
467 | ||
468 | for (b = operator_array; | |
469 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
470 | b++) | |
471 | { | |
472 | if (type == b->value) | |
473 | return (const char *) b->name; | |
474 | } | |
475 | ||
476 | return NULL; | |
477 | } | |
478 | ||
c1bad961 | 479 | void |
ccfc4c91 | 480 | cpp_init_special_builtins (cpp_reader *pfile) |
a9ae4483 | 481 | { |
c047ce93 | 482 | const struct builtin_macro *b; |
278c4662 | 483 | size_t n = ARRAY_SIZE (builtin_array); |
771c4df3 | 484 | |
278c4662 NB |
485 | if (CPP_OPTION (pfile, traditional)) |
486 | n -= 2; | |
83900997 JJ |
487 | else if (! CPP_OPTION (pfile, stdc_0_in_system_headers) |
488 | || CPP_OPTION (pfile, std)) | |
ccfc4c91 | 489 | n--; |
278c4662 | 490 | |
83900997 | 491 | for (b = builtin_array; b < builtin_array + n; b++) |
6de1e2a9 | 492 | { |
ad1539d5 MS |
493 | if ((b->value == BT_HAS_ATTRIBUTE |
494 | || b->value == BT_HAS_BUILTIN) | |
1f8d3e84 JJ |
495 | && (CPP_OPTION (pfile, lang) == CLK_ASM |
496 | || pfile->cb.has_attribute == NULL)) | |
497 | continue; | |
f24a153a | 498 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
a570d97f | 499 | hp->type = NT_BUILTIN_MACRO; |
b753b37b | 500 | if (b->always_warn_if_redefined) |
c047ce93 | 501 | hp->flags |= NODE_WARN; |
7e5487a2 | 502 | hp->value.builtin = (enum cpp_builtin_type) b->value; |
6de1e2a9 | 503 | } |
ccfc4c91 OW |
504 | } |
505 | ||
aa23e73b JJ |
506 | /* Restore macro C to builtin macro definition. */ |
507 | ||
508 | void | |
509 | _cpp_restore_special_builtin (cpp_reader *pfile, struct def_pragma_macro *c) | |
510 | { | |
511 | size_t len = strlen (c->name); | |
512 | ||
513 | for (const struct builtin_macro *b = builtin_array; | |
514 | b < builtin_array + ARRAY_SIZE (builtin_array); b++) | |
515 | if (b->len == len && memcmp (c->name, b->name, len + 1) == 0) | |
516 | { | |
517 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
518 | hp->type = NT_BUILTIN_MACRO; | |
519 | if (b->always_warn_if_redefined) | |
520 | hp->flags |= NODE_WARN; | |
521 | hp->value.builtin = (enum cpp_builtin_type) b->value; | |
522 | } | |
523 | } | |
524 | ||
ccfc4c91 OW |
525 | /* Read the builtins table above and enter them, and language-specific |
526 | macros, into the hash table. HOSTED is true if this is a hosted | |
527 | environment. */ | |
528 | void | |
529 | cpp_init_builtins (cpp_reader *pfile, int hosted) | |
530 | { | |
531 | cpp_init_special_builtins (pfile); | |
532 | ||
533 | if (!CPP_OPTION (pfile, traditional) | |
534 | && (! CPP_OPTION (pfile, stdc_0_in_system_headers) | |
535 | || CPP_OPTION (pfile, std))) | |
536 | _cpp_define_builtin (pfile, "__STDC__ 1"); | |
c740cee2 NB |
537 | |
538 | if (CPP_OPTION (pfile, cplusplus)) | |
1fb80b0c | 539 | { |
b04445d4 JM |
540 | if (CPP_OPTION (pfile, lang) == CLK_CXX20 |
541 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX20) | |
026a79f7 AS |
542 | _cpp_define_builtin (pfile, "__cplusplus 201709L"); |
543 | else if (CPP_OPTION (pfile, lang) == CLK_CXX17 | |
7b936140 | 544 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX17) |
85e653c9 | 545 | _cpp_define_builtin (pfile, "__cplusplus 201703L"); |
e4276ba5 ESR |
546 | else if (CPP_OPTION (pfile, lang) == CLK_CXX14 |
547 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX14) | |
548 | _cpp_define_builtin (pfile, "__cplusplus 201402L"); | |
61949153 PC |
549 | else if (CPP_OPTION (pfile, lang) == CLK_CXX11 |
550 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX11) | |
1fb80b0c JM |
551 | _cpp_define_builtin (pfile, "__cplusplus 201103L"); |
552 | else | |
553 | _cpp_define_builtin (pfile, "__cplusplus 199711L"); | |
554 | } | |
2a1dc0d8 ZW |
555 | else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
556 | _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); | |
0f7866e7 | 557 | else if (CPP_OPTION (pfile, lang) == CLK_STDC94) |
c740cee2 | 558 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); |
9f936c86 JM |
559 | else if (CPP_OPTION (pfile, lang) == CLK_STDC2X |
560 | || CPP_OPTION (pfile, lang) == CLK_GNUC2X) | |
561 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 202000L"); | |
c76dc9c3 JM |
562 | else if (CPP_OPTION (pfile, lang) == CLK_STDC17 |
563 | || CPP_OPTION (pfile, lang) == CLK_GNUC17) | |
564 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 201710L"); | |
48b0b196 JM |
565 | else if (CPP_OPTION (pfile, lang) == CLK_STDC11 |
566 | || CPP_OPTION (pfile, lang) == CLK_GNUC11) | |
567 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 201112L"); | |
c740cee2 NB |
568 | else if (CPP_OPTION (pfile, c99)) |
569 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); | |
570 | ||
a48e3dd1 | 571 | if (CPP_OPTION (pfile, uliterals) |
e4276ba5 ESR |
572 | && !(CPP_OPTION (pfile, cplusplus) |
573 | && (CPP_OPTION (pfile, lang) == CLK_GNUCXX | |
574 | || CPP_OPTION (pfile, lang) == CLK_CXX98))) | |
a48e3dd1 JM |
575 | { |
576 | _cpp_define_builtin (pfile, "__STDC_UTF_16__ 1"); | |
577 | _cpp_define_builtin (pfile, "__STDC_UTF_32__ 1"); | |
578 | } | |
579 | ||
6e270179 | 580 | if (hosted) |
58b5b894 | 581 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1"); |
6e270179 | 582 | else |
58b5b894 | 583 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0"); |
6e270179 | 584 | |
0f7866e7 ZL |
585 | if (CPP_OPTION (pfile, objc)) |
586 | _cpp_define_builtin (pfile, "__OBJC__ 1"); | |
4a58aab6 NB |
587 | } |
588 | ||
2443d4e1 | 589 | /* Sanity-checks are dependent on command-line options, so it is |
174f6622 | 590 | called as a subroutine of cpp_read_main_file. */ |
22d66382 | 591 | #if CHECKING_P |
6cf87ca4 ZW |
592 | static void sanity_checks (cpp_reader *); |
593 | static void sanity_checks (cpp_reader *pfile) | |
2443d4e1 NB |
594 | { |
595 | cppchar_t test = 0; | |
c9220e3a | 596 | size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); |
2443d4e1 NB |
597 | |
598 | /* Sanity checks for assumptions about CPP arithmetic and target | |
599 | type precisions made by cpplib. */ | |
600 | test--; | |
601 | if (test < 1) | |
0527bc4e | 602 | cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type"); |
2443d4e1 | 603 | |
c9220e3a | 604 | if (CPP_OPTION (pfile, precision) > max_precision) |
0527bc4e | 605 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
606 | "preprocessor arithmetic has maximum precision of %lu bits;" |
607 | " target requires %lu bits", | |
c9220e3a NB |
608 | (unsigned long) max_precision, |
609 | (unsigned long) CPP_OPTION (pfile, precision)); | |
2443d4e1 NB |
610 | |
611 | if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) | |
0527bc4e | 612 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
613 | "CPP arithmetic must be at least as precise as a target int"); |
614 | ||
615 | if (CPP_OPTION (pfile, char_precision) < 8) | |
0527bc4e | 616 | cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide"); |
2443d4e1 NB |
617 | |
618 | if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 619 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
620 | "target wchar_t is narrower than target char"); |
621 | ||
622 | if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 623 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
624 | "target int is narrower than target char"); |
625 | ||
c9220e3a NB |
626 | /* This is assumed in eval_token() and could be fixed if necessary. */ |
627 | if (sizeof (cppchar_t) > sizeof (cpp_num_part)) | |
0527bc4e JDA |
628 | cpp_error (pfile, CPP_DL_ICE, |
629 | "CPP half-integer narrower than CPP character"); | |
c9220e3a | 630 | |
2443d4e1 | 631 | if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) |
0527bc4e | 632 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
633 | "CPP on this host cannot handle wide character constants over" |
634 | " %lu bits, but the target requires %lu bits", | |
c9220e3a NB |
635 | (unsigned long) BITS_PER_CPPCHAR_T, |
636 | (unsigned long) CPP_OPTION (pfile, wchar_precision)); | |
2443d4e1 NB |
637 | } |
638 | #else | |
639 | # define sanity_checks(PFILE) | |
640 | #endif | |
641 | ||
f5e99456 | 642 | /* This is called after options have been parsed, and partially |
59e4e217 | 643 | processed. */ |
4169c321 PB |
644 | void |
645 | cpp_post_options (cpp_reader *pfile) | |
6de1e2a9 | 646 | { |
3d8b2a98 ILT |
647 | int flags; |
648 | ||
2443d4e1 NB |
649 | sanity_checks (pfile); |
650 | ||
f4ff5a69 NB |
651 | post_options (pfile); |
652 | ||
c19b12cb | 653 | /* Mark named operators before handling command line macros. */ |
3d8b2a98 | 654 | flags = 0; |
c19b12cb | 655 | if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) |
3d8b2a98 ILT |
656 | flags |= NODE_OPERATOR; |
657 | if (CPP_OPTION (pfile, warn_cxx_operator_names)) | |
658 | flags |= NODE_DIAGNOSTIC | NODE_WARN_OPERATOR; | |
659 | if (flags != 0) | |
660 | mark_named_operators (pfile, flags); | |
4169c321 | 661 | } |
c19b12cb | 662 | |
4dc299fb | 663 | /* Setup for processing input from the file named FNAME, or stdin if |
6bf2ff0d NS |
664 | it is the empty string. Return the original filename on success |
665 | (e.g. foo.i->foo.c), or NULL on failure. INJECTING is true if | |
666 | there may be injected headers before line 1 of the main file. */ | |
8e9ea4d7 | 667 | const char * |
6bf2ff0d | 668 | cpp_read_main_file (cpp_reader *pfile, const char *fname, bool injecting) |
4169c321 | 669 | { |
f4ff5a69 NB |
670 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
671 | { | |
672 | if (!pfile->deps) | |
673 | pfile->deps = deps_init (); | |
674 | ||
675 | /* Set the default target (if there is none already). */ | |
676 | deps_add_default_target (pfile->deps, fname); | |
677 | } | |
96302433 | 678 | |
4dc299fb | 679 | pfile->main_file |
ad1a3914 | 680 | = _cpp_find_file (pfile, fname, &pfile->no_search_path, /*angle=*/0, |
4623a6f2 | 681 | _cpp_FFK_NORMAL, 0); |
4dc299fb | 682 | if (_cpp_find_failed (pfile->main_file)) |
3092d0fc | 683 | return NULL; |
f5e99456 | 684 | |
6bf2ff0d | 685 | _cpp_stack_file (pfile, pfile->main_file, |
d1c566d7 NS |
686 | injecting || CPP_OPTION (pfile, preprocessed) |
687 | ? IT_PRE_MAIN : IT_MAIN, 0); | |
4dc299fb PB |
688 | |
689 | /* For foo.i, read the original filename foo.c now, for the benefit | |
690 | of the front ends. */ | |
691 | if (CPP_OPTION (pfile, preprocessed)) | |
d1c566d7 NS |
692 | if (!read_original_filename (pfile)) |
693 | { | |
694 | /* We're on line 1 after all. */ | |
695 | auto *last = linemap_check_ordinary | |
696 | (LINEMAPS_LAST_MAP (pfile->line_table, false)); | |
697 | last->to_line = 1; | |
698 | /* Inform of as-if a file change. */ | |
699 | _cpp_do_file_change (pfile, LC_RENAME_VERBATIM, LINEMAP_FILE (last), | |
700 | LINEMAP_LINE (last), LINEMAP_SYSP (last)); | |
701 | } | |
134051f1 NS |
702 | |
703 | return ORDINARY_MAP_FILE_NAME (LINEMAPS_LAST_ORDINARY_MAP (pfile->line_table)); | |
f5e99456 NB |
704 | } |
705 | ||
d1c566d7 NS |
706 | /* For preprocessed files, if the very first characters are |
707 | '#<SPACE>[01]<SPACE>', then handle a line directive so we know the | |
708 | original file name. This will generate file_change callbacks, | |
709 | which the front ends must handle appropriately given their state of | |
710 | initialization. We peek directly into the character buffer, so | |
711 | that we're not confused by otherwise-skipped white space & | |
712 | comments. We can be very picky, because this should have been | |
713 | machine-generated text (by us, no less). This way we do not | |
714 | interfere with the module directive state machine. */ | |
715 | ||
716 | static bool | |
6cf87ca4 | 717 | read_original_filename (cpp_reader *pfile) |
f5e99456 | 718 | { |
d1c566d7 NS |
719 | auto *buf = pfile->buffer->next_line; |
720 | ||
721 | if (pfile->buffer->rlimit - buf > 4 | |
722 | && buf[0] == '#' | |
723 | && buf[1] == ' ' | |
724 | // Also permit '1', as that's what used to be here | |
725 | && (buf[2] == '0' || buf[2] == '1') | |
726 | && buf[3] == ' ') | |
f5e99456 | 727 | { |
d1c566d7 NS |
728 | const cpp_token *token = _cpp_lex_direct (pfile); |
729 | gcc_checking_assert (token->type == CPP_HASH); | |
730 | if (_cpp_handle_directive (pfile, token->flags & PREV_WHITE)) | |
f5e99456 | 731 | { |
b20d9f0c | 732 | read_original_directory (pfile); |
d1c566d7 | 733 | return true; |
f5e99456 NB |
734 | } |
735 | } | |
736 | ||
d1c566d7 | 737 | return false; |
f5e99456 NB |
738 | } |
739 | ||
b20d9f0c AO |
740 | /* For preprocessed files, if the tokens following the first filename |
741 | line is of the form # <line> "/path/name//", handle the | |
d1c566d7 NS |
742 | directive so we know the original current directory. |
743 | ||
744 | As with the first line peeking, we can do this without lexing by | |
745 | being picky. */ | |
b20d9f0c AO |
746 | static void |
747 | read_original_directory (cpp_reader *pfile) | |
748 | { | |
d1c566d7 NS |
749 | auto *buf = pfile->buffer->next_line; |
750 | ||
751 | if (pfile->buffer->rlimit - buf > 4 | |
752 | && buf[0] == '#' | |
753 | && buf[1] == ' ' | |
754 | // Also permit '1', as that's what used to be here | |
755 | && (buf[2] == '0' || buf[2] == '1') | |
756 | && buf[3] == ' ') | |
b20d9f0c | 757 | { |
d1c566d7 NS |
758 | const cpp_token *hash = _cpp_lex_direct (pfile); |
759 | gcc_checking_assert (hash->type == CPP_HASH); | |
760 | pfile->state.in_directive = 1; | |
761 | const cpp_token *number = _cpp_lex_direct (pfile); | |
762 | gcc_checking_assert (number->type == CPP_NUMBER); | |
763 | const cpp_token *string = _cpp_lex_direct (pfile); | |
764 | pfile->state.in_directive = 0; | |
b20d9f0c | 765 | |
d1c566d7 NS |
766 | const unsigned char *text = nullptr; |
767 | size_t len = 0; | |
768 | if (string->type == CPP_STRING) | |
769 | { | |
770 | /* The string value includes the quotes. */ | |
771 | text = string->val.str.text; | |
772 | len = string->val.str.len; | |
773 | } | |
774 | if (len < 5 | |
775 | || !IS_DIR_SEPARATOR (text[len - 2]) | |
776 | || !IS_DIR_SEPARATOR (text[len - 3])) | |
777 | { | |
778 | /* That didn't work out, back out. */ | |
779 | _cpp_backup_tokens (pfile, 3); | |
780 | return; | |
781 | } | |
b20d9f0c | 782 | |
d1c566d7 NS |
783 | if (pfile->cb.dir_change) |
784 | { | |
785 | /* Smash the string directly, it's dead at this point */ | |
786 | char *smashy = (char *)text; | |
787 | smashy[len - 3] = 0; | |
788 | ||
789 | pfile->cb.dir_change (pfile, smashy + 1); | |
790 | } | |
b20d9f0c | 791 | |
d1c566d7 | 792 | /* We should be at EOL. */ |
b20d9f0c | 793 | } |
b20d9f0c AO |
794 | } |
795 | ||
76c3e73e | 796 | /* This is called at the end of preprocessing. It pops the last |
148e4216 | 797 | buffer and writes dependency output. |
16dd5cfe | 798 | |
76c3e73e NB |
799 | Maybe it should also reset state, such that you could call |
800 | cpp_start_read with a new filename to restart processing. */ | |
148e4216 | 801 | void |
6cf87ca4 | 802 | cpp_finish (cpp_reader *pfile, FILE *deps_stream) |
6de1e2a9 | 803 | { |
a69cbaac NB |
804 | /* Warn about unused macros before popping the final buffer. */ |
805 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
806 | cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); | |
807 | ||
a2566ae9 | 808 | /* lex.c leaves the final buffer on the stack. This it so that |
7364fdd8 | 809 | it returns an unending stream of CPP_EOFs to the client. If we |
a1f300c0 | 810 | popped the buffer, we'd dereference a NULL buffer pointer and |
7364fdd8 NB |
811 | segfault. It's nice to allow the client to do worry-free excess |
812 | cpp_get_token calls. */ | |
813 | while (pfile->buffer) | |
814 | _cpp_pop_buffer (pfile); | |
c1212d2f | 815 | |
d7b6aee8 NS |
816 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE && deps_stream) |
817 | deps_write (pfile->deps, deps_stream, | |
818 | CPP_OPTION (pfile, deps.phony_targets), 72); | |
3caee4a8 | 819 | |
d4506961 ZW |
820 | /* Report on headers that could use multiple include guards. */ |
821 | if (CPP_OPTION (pfile, print_include_names)) | |
c71f835b | 822 | _cpp_report_missing_guards (pfile); |
6de1e2a9 ZW |
823 | } |
824 | ||
f4ff5a69 | 825 | static void |
6cf87ca4 | 826 | post_options (cpp_reader *pfile) |
96302433 NB |
827 | { |
828 | /* -Wtraditional is not useful in C++ mode. */ | |
829 | if (CPP_OPTION (pfile, cplusplus)) | |
e3339d0f | 830 | CPP_OPTION (pfile, cpp_warn_traditional) = 0; |
96302433 | 831 | |
6d4587f7 | 832 | /* Permanently disable macro expansion if we are rescanning |
43612ffb | 833 | preprocessed text. Read preprocesed source in ISO mode. */ |
6d4587f7 | 834 | if (CPP_OPTION (pfile, preprocessed)) |
43612ffb | 835 | { |
ccfc4c91 OW |
836 | if (!CPP_OPTION (pfile, directives_only)) |
837 | pfile->state.prevent_expansion = 1; | |
43612ffb NB |
838 | CPP_OPTION (pfile, traditional) = 0; |
839 | } | |
840 | ||
a8eb6044 NB |
841 | if (CPP_OPTION (pfile, warn_trigraphs) == 2) |
842 | CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs); | |
843 | ||
43612ffb | 844 | if (CPP_OPTION (pfile, traditional)) |
26aea073 | 845 | { |
26aea073 NB |
846 | CPP_OPTION (pfile, trigraphs) = 0; |
847 | CPP_OPTION (pfile, warn_trigraphs) = 0; | |
848 | } | |
7ca3d2b1 | 849 | } |