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5538ada6 | 1 | /* CPP Library. |
85ec4feb | 2 | Copyright (C) 1986-2018 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); |
6cf87ca4 | 39 | static void 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; |
a01eb545 ZW |
95 | }; |
96 | ||
a01eb545 | 97 | static const struct lang_flags lang_defaults[] = |
fb771b9d TT |
98 | { /* c99 c++ xnum xid c11 std digr ulit rlit udlit bincst digsep trig u8chlit vaopt */ |
99 | /* GNUC89 */ { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1 }, | |
100 | /* GNUC99 */ { 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1 }, | |
101 | /* GNUC11 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1 }, | |
102 | /* GNUC17 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1 }, | |
9f936c86 | 103 | /* GNUC2X */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1 }, |
fb771b9d TT |
104 | /* STDC89 */ { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, |
105 | /* STDC94 */ { 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0 }, | |
106 | /* STDC99 */ { 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0 }, | |
107 | /* STDC11 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0 }, | |
108 | /* STDC17 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0 }, | |
9f936c86 | 109 | /* STDC2X */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0 }, |
fb771b9d TT |
110 | /* GNUCXX */ { 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1 }, |
111 | /* CXX98 */ { 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0 }, | |
112 | /* GNUCXX11 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1 }, | |
113 | /* CXX11 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0 }, | |
114 | /* GNUCXX14 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1 }, | |
115 | /* CXX14 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0 }, | |
116 | /* GNUCXX17 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1 }, | |
117 | /* CXX17 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0 }, | |
118 | /* GNUCXX2A */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1 }, | |
119 | /* CXX2A */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1 }, | |
120 | /* ASM */ { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } | |
a01eb545 ZW |
121 | }; |
122 | ||
5d8ebbd8 | 123 | /* Sets internal flags correctly for a given language. */ |
f749a36b | 124 | void |
6cf87ca4 | 125 | cpp_set_lang (cpp_reader *pfile, enum c_lang lang) |
dd07b884 | 126 | { |
a01eb545 | 127 | const struct lang_flags *l = &lang_defaults[(int) lang]; |
df383483 | 128 | |
bdb05a7b | 129 | CPP_OPTION (pfile, lang) = lang; |
dd07b884 | 130 | |
af15a2fe JM |
131 | CPP_OPTION (pfile, c99) = l->c99; |
132 | CPP_OPTION (pfile, cplusplus) = l->cplusplus; | |
133 | CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; | |
134 | CPP_OPTION (pfile, extended_identifiers) = l->extended_identifiers; | |
d3f4ff8b | 135 | CPP_OPTION (pfile, c11_identifiers) = l->c11_identifiers; |
af15a2fe | 136 | CPP_OPTION (pfile, std) = l->std; |
af15a2fe | 137 | CPP_OPTION (pfile, digraphs) = l->digraphs; |
b6baa67d | 138 | CPP_OPTION (pfile, uliterals) = l->uliterals; |
a48e3dd1 | 139 | CPP_OPTION (pfile, rliterals) = l->rliterals; |
3ce4f9e4 | 140 | CPP_OPTION (pfile, user_literals) = l->user_literals; |
01187df0 | 141 | CPP_OPTION (pfile, binary_constants) = l->binary_constants; |
7057e645 | 142 | CPP_OPTION (pfile, digit_separators) = l->digit_separators; |
e4276ba5 | 143 | CPP_OPTION (pfile, trigraphs) = l->trigraphs; |
fe95b036 | 144 | CPP_OPTION (pfile, utf8_char_literals) = l->utf8_char_literals; |
fb771b9d | 145 | CPP_OPTION (pfile, va_opt) = l->va_opt; |
dd07b884 NB |
146 | } |
147 | ||
c1bad961 | 148 | /* Initialize library global state. */ |
cf44ea52 | 149 | static void |
6cf87ca4 | 150 | init_library (void) |
cf44ea52 | 151 | { |
7ca3d2b1 NB |
152 | static int initialized = 0; |
153 | ||
154 | if (! initialized) | |
155 | { | |
156 | initialized = 1; | |
157 | ||
b0c084b7 JJ |
158 | _cpp_init_lexer (); |
159 | ||
7ca3d2b1 NB |
160 | /* Set up the trigraph map. This doesn't need to do anything if |
161 | we were compiled with a compiler that supports C99 designated | |
162 | initializers. */ | |
163 | init_trigraph_map (); | |
4f4e53dd PB |
164 | |
165 | #ifdef ENABLE_NLS | |
85eac2a0 | 166 | (void) bindtextdomain (PACKAGE, LOCALEDIR); |
4f4e53dd | 167 | #endif |
7ca3d2b1 | 168 | } |
cf44ea52 NB |
169 | } |
170 | ||
ec5c56db | 171 | /* Initialize a cpp_reader structure. */ |
cf44ea52 | 172 | cpp_reader * |
0823efed | 173 | cpp_create_reader (enum c_lang lang, cpp_hash_table *table, |
50f59cd7 | 174 | struct line_maps *line_table) |
6de1e2a9 | 175 | { |
7ca3d2b1 | 176 | cpp_reader *pfile; |
93c80368 | 177 | |
4912a07c | 178 | /* Initialize this instance of the library if it hasn't been already. */ |
674c3b40 | 179 | init_library (); |
7ca3d2b1 | 180 | |
c3f829c1 | 181 | pfile = XCNEW (cpp_reader); |
92582b75 | 182 | memset (&pfile->base_context, 0, sizeof (pfile->base_context)); |
93c80368 | 183 | |
f749a36b | 184 | cpp_set_lang (pfile, lang); |
a5a49440 | 185 | CPP_OPTION (pfile, warn_multichar) = 1; |
ae79697b | 186 | CPP_OPTION (pfile, discard_comments) = 1; |
477cdac7 | 187 | CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; |
6ab3e7dd | 188 | CPP_OPTION (pfile, tabstop) = 8; |
be768055 | 189 | CPP_OPTION (pfile, operator_names) = 1; |
a8eb6044 | 190 | CPP_OPTION (pfile, warn_trigraphs) = 2; |
909de5da | 191 | CPP_OPTION (pfile, warn_endif_labels) = 1; |
2b71f4a4 | 192 | CPP_OPTION (pfile, cpp_warn_c90_c99_compat) = -1; |
fe191308 | 193 | CPP_OPTION (pfile, cpp_warn_cxx11_compat) = 0; |
e3339d0f JM |
194 | CPP_OPTION (pfile, cpp_warn_deprecated) = 1; |
195 | CPP_OPTION (pfile, cpp_warn_long_long) = 0; | |
b1822ccc | 196 | CPP_OPTION (pfile, dollars_in_ident) = 1; |
78b8811a | 197 | CPP_OPTION (pfile, warn_dollars) = 1; |
e5b79219 | 198 | CPP_OPTION (pfile, warn_variadic_macros) = 1; |
c047ce93 | 199 | CPP_OPTION (pfile, warn_builtin_macro_redefined) = 1; |
70f6d5e1 | 200 | CPP_OPTION (pfile, cpp_warn_implicit_fallthrough) = 0; |
51fce2d3 DS |
201 | /* By default, track locations of tokens resulting from macro |
202 | expansion. The '2' means, track the locations with the highest | |
203 | accuracy. Read the comments for struct | |
204 | cpp_options::track_macro_expansion to learn about the other | |
205 | values. */ | |
206 | CPP_OPTION (pfile, track_macro_expansion) = 2; | |
50668cf6 | 207 | CPP_OPTION (pfile, warn_normalize) = normalized_C; |
7f5f5f98 | 208 | CPP_OPTION (pfile, warn_literal_suffix) = 1; |
5dc99c46 SB |
209 | CPP_OPTION (pfile, canonical_system_headers) |
210 | = ENABLE_CANONICAL_SYSTEM_HEADERS; | |
a4a0016d | 211 | CPP_OPTION (pfile, ext_numeric_literals) = 1; |
e8ff5196 | 212 | CPP_OPTION (pfile, warn_date_time) = 0; |
ae79697b | 213 | |
2443d4e1 NB |
214 | /* Default CPP arithmetic to something sensible for the host for the |
215 | benefit of dumb users like fix-header. */ | |
c9220e3a | 216 | CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); |
2443d4e1 NB |
217 | CPP_OPTION (pfile, char_precision) = CHAR_BIT; |
218 | CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); | |
219 | CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); | |
2a1dc0d8 | 220 | CPP_OPTION (pfile, unsigned_char) = 0; |
44a147ad | 221 | CPP_OPTION (pfile, unsigned_wchar) = 1; |
e6cc3a24 ZW |
222 | CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */ |
223 | ||
224 | /* Default to no charset conversion. */ | |
16dd5cfe | 225 | CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding (); |
e6cc3a24 | 226 | CPP_OPTION (pfile, wide_charset) = 0; |
4268e8bb | 227 | |
16dd5cfe EC |
228 | /* Default the input character set to UTF-8. */ |
229 | CPP_OPTION (pfile, input_charset) = _cpp_default_encoding (); | |
cf551fba | 230 | |
8f9b4009 NB |
231 | /* A fake empty "directory" used as the starting point for files |
232 | looked up without a search path. Name cannot be '/' because we | |
233 | don't want to prepend anything at all to filenames using it. All | |
234 | other entries are correct zero-initialized. */ | |
235 | pfile->no_search_path.name = (char *) ""; | |
236 | ||
500bee0a | 237 | /* Initialize the line map. */ |
50f59cd7 | 238 | pfile->line_table = line_table; |
d82fc108 | 239 | |
4a58aab6 | 240 | /* Initialize lexer state. */ |
93c80368 NB |
241 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
242 | ||
4ed5bcfb | 243 | /* Set up static tokens. */ |
4ed5bcfb NB |
244 | pfile->avoid_paste.type = CPP_PADDING; |
245 | pfile->avoid_paste.val.source = NULL; | |
246 | pfile->eof.type = CPP_EOF; | |
247 | pfile->eof.flags = 0; | |
93c80368 | 248 | |
5fddcffc NB |
249 | /* Create a token buffer for the lexer. */ |
250 | _cpp_init_tokenrun (&pfile->base_run, 250); | |
251 | pfile->cur_run = &pfile->base_run; | |
252 | pfile->cur_token = pfile->base_run.base; | |
5fddcffc | 253 | |
4912a07c | 254 | /* Initialize the base context. */ |
93c80368 | 255 | pfile->context = &pfile->base_context; |
92582b75 | 256 | pfile->base_context.c.macro = 0; |
93c80368 NB |
257 | pfile->base_context.prev = pfile->base_context.next = 0; |
258 | ||
8c3b2693 NB |
259 | /* Aligned and unaligned storage. */ |
260 | pfile->a_buff = _cpp_get_buff (pfile, 0); | |
ece54d54 | 261 | pfile->u_buff = _cpp_get_buff (pfile, 0); |
93c80368 | 262 | |
17e7cb85 KT |
263 | /* Initialize table for push_macro/pop_macro. */ |
264 | pfile->pushed_macros = 0; | |
265 | ||
e3dfef44 | 266 | /* Do not force token locations by default. */ |
f3f6029d | 267 | pfile->forced_token_location = 0; |
e3dfef44 | 268 | |
15c98b2e ES |
269 | /* Initialize source_date_epoch to -2 (not yet set). */ |
270 | pfile->source_date_epoch = (time_t) -2; | |
271 | ||
87ed109f NB |
272 | /* The expression parser stack. */ |
273 | _cpp_expand_op_stack (pfile); | |
274 | ||
4912a07c | 275 | /* Initialize the buffer obstack. */ |
19a9ba64 | 276 | obstack_specify_allocation (&pfile->buffer_ob, 0, 0, xmalloc, free); |
2a967f3d | 277 | |
8f9b4009 | 278 | _cpp_init_files (pfile); |
cf44ea52 | 279 | |
b4e46cea PB |
280 | _cpp_init_hashtable (pfile, table); |
281 | ||
cf44ea52 | 282 | return pfile; |
f2d5f0cc ZW |
283 | } |
284 | ||
5ffeb913 TT |
285 | /* Set the line_table entry in PFILE. This is called after reading a |
286 | PCH file, as the old line_table will be incorrect. */ | |
287 | void | |
288 | cpp_set_line_map (cpp_reader *pfile, struct line_maps *line_table) | |
289 | { | |
290 | pfile->line_table = line_table; | |
291 | } | |
292 | ||
400023a3 | 293 | /* Free resources used by PFILE. Accessing PFILE after this function |
8d9afc4e | 294 | returns leads to undefined behavior. Returns the error count. */ |
76c3e73e | 295 | void |
6cf87ca4 | 296 | cpp_destroy (cpp_reader *pfile) |
6de1e2a9 | 297 | { |
93c80368 | 298 | cpp_context *context, *contextn; |
17e7cb85 | 299 | struct def_pragma_macro *pmacro; |
50410426 | 300 | tokenrun *run, *runn; |
631d0d36 | 301 | int i; |
709e9e50 | 302 | |
87ed109f | 303 | free (pfile->op_stack); |
af0d16cd | 304 | |
38b24ee2 | 305 | while (CPP_BUFFER (pfile) != NULL) |
ef6e958a | 306 | _cpp_pop_buffer (pfile); |
6de1e2a9 | 307 | |
04695783 | 308 | free (pfile->out.base); |
004cb263 | 309 | |
93c80368 | 310 | if (pfile->macro_buffer) |
4b49c365 | 311 | { |
fad205ff | 312 | free (pfile->macro_buffer); |
4b49c365 AO |
313 | pfile->macro_buffer = NULL; |
314 | pfile->macro_buffer_len = 0; | |
315 | } | |
93c80368 | 316 | |
f4ff5a69 NB |
317 | if (pfile->deps) |
318 | deps_free (pfile->deps); | |
2a967f3d | 319 | obstack_free (&pfile->buffer_ob, 0); |
49e6c08e | 320 | |
2a967f3d | 321 | _cpp_destroy_hashtable (pfile); |
8f9b4009 | 322 | _cpp_cleanup_files (pfile); |
e6cc3a24 | 323 | _cpp_destroy_iconv (pfile); |
709e9e50 | 324 | |
8c3b2693 | 325 | _cpp_free_buff (pfile->a_buff); |
ece54d54 | 326 | _cpp_free_buff (pfile->u_buff); |
b8af0ca5 | 327 | _cpp_free_buff (pfile->free_buffs); |
93c80368 | 328 | |
50410426 NB |
329 | for (run = &pfile->base_run; run; run = runn) |
330 | { | |
331 | runn = run->next; | |
332 | free (run->base); | |
333 | if (run != &pfile->base_run) | |
334 | free (run); | |
335 | } | |
336 | ||
93c80368 NB |
337 | for (context = pfile->base_context.next; context; context = contextn) |
338 | { | |
339 | contextn = context->next; | |
340 | free (context); | |
341 | } | |
400023a3 | 342 | |
631d0d36 MG |
343 | if (pfile->comments.entries) |
344 | { | |
345 | for (i = 0; i < pfile->comments.count; i++) | |
346 | free (pfile->comments.entries[i].comment); | |
347 | ||
348 | free (pfile->comments.entries); | |
349 | } | |
17e7cb85 KT |
350 | if (pfile->pushed_macros) |
351 | { | |
352 | do | |
353 | { | |
354 | pmacro = pfile->pushed_macros; | |
355 | pfile->pushed_macros = pmacro->next; | |
356 | free (pmacro->name); | |
357 | free (pmacro); | |
358 | } | |
359 | while (pfile->pushed_macros); | |
360 | } | |
631d0d36 | 361 | |
400023a3 | 362 | free (pfile); |
6de1e2a9 ZW |
363 | } |
364 | ||
93c80368 | 365 | /* This structure defines one built-in identifier. A node will be |
f24a153a ZW |
366 | entered in the hash table under the name NAME, with value VALUE. |
367 | ||
368 | There are two tables of these. builtin_array holds all the | |
369 | "builtin" macros: these are handled by builtin_macro() in | |
a2566ae9 | 370 | macro.c. Builtin is somewhat of a misnomer -- the property of |
f24a153a | 371 | interest is that these macros require special code to compute their |
128465e6 | 372 | expansions. The value is a "cpp_builtin_type" enumerator. |
f24a153a ZW |
373 | |
374 | operator_array holds the C++ named operators. These are keywords | |
375 | which act as aliases for punctuators. In C++, they cannot be | |
376 | altered through #define, and #if recognizes them as operators. In | |
377 | C, these are not entered into the hash table at all (but see | |
378 | <iso646.h>). The value is a token-type enumerator. */ | |
c047ce93 | 379 | struct builtin_macro |
a9ae4483 | 380 | { |
c047ce93 SB |
381 | const uchar *const name; |
382 | const unsigned short len; | |
383 | const unsigned short value; | |
384 | const bool always_warn_if_redefined; | |
a9ae4483 | 385 | }; |
93c80368 | 386 | |
c047ce93 SB |
387 | #define B(n, t, f) { DSC(n), t, f } |
388 | static const struct builtin_macro builtin_array[] = | |
6de1e2a9 | 389 | { |
c047ce93 SB |
390 | B("__TIMESTAMP__", BT_TIMESTAMP, false), |
391 | B("__TIME__", BT_TIME, false), | |
392 | B("__DATE__", BT_DATE, false), | |
393 | B("__FILE__", BT_FILE, false), | |
394 | B("__BASE_FILE__", BT_BASE_FILE, false), | |
395 | B("__LINE__", BT_SPECLINE, true), | |
396 | B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL, true), | |
397 | B("__COUNTER__", BT_COUNTER, true), | |
1f8d3e84 JJ |
398 | B("__has_attribute", BT_HAS_ATTRIBUTE, true), |
399 | B("__has_cpp_attribute", BT_HAS_ATTRIBUTE, true), | |
278c4662 NB |
400 | /* Keep builtins not used for -traditional-cpp at the end, and |
401 | update init_builtins() if any more are added. */ | |
c047ce93 SB |
402 | B("_Pragma", BT_PRAGMA, true), |
403 | B("__STDC__", BT_STDC, true), | |
404 | }; | |
405 | #undef B | |
406 | ||
407 | struct builtin_operator | |
408 | { | |
409 | const uchar *const name; | |
410 | const unsigned short len; | |
411 | const unsigned short value; | |
f24a153a | 412 | }; |
92936ecf | 413 | |
c047ce93 SB |
414 | #define B(n, t) { DSC(n), t } |
415 | static const struct builtin_operator operator_array[] = | |
f24a153a ZW |
416 | { |
417 | B("and", CPP_AND_AND), | |
418 | B("and_eq", CPP_AND_EQ), | |
419 | B("bitand", CPP_AND), | |
420 | B("bitor", CPP_OR), | |
421 | B("compl", CPP_COMPL), | |
422 | B("not", CPP_NOT), | |
423 | B("not_eq", CPP_NOT_EQ), | |
424 | B("or", CPP_OR_OR), | |
425 | B("or_eq", CPP_OR_EQ), | |
426 | B("xor", CPP_XOR), | |
427 | B("xor_eq", CPP_XOR_EQ) | |
a9ae4483 | 428 | }; |
12cf91fe | 429 | #undef B |
a9ae4483 | 430 | |
17645b15 NB |
431 | /* Mark the C++ named operators in the hash table. */ |
432 | static void | |
3d8b2a98 | 433 | mark_named_operators (cpp_reader *pfile, int flags) |
17645b15 | 434 | { |
c047ce93 | 435 | const struct builtin_operator *b; |
17645b15 NB |
436 | |
437 | for (b = operator_array; | |
438 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
439 | b++) | |
440 | { | |
441 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
3d8b2a98 | 442 | hp->flags |= flags; |
4977bab6 ZW |
443 | hp->is_directive = 0; |
444 | hp->directive_index = b->value; | |
17645b15 NB |
445 | } |
446 | } | |
447 | ||
cfc93532 MLI |
448 | /* Helper function of cpp_type2name. Return the string associated with |
449 | named operator TYPE. */ | |
450 | const char * | |
451 | cpp_named_operator2name (enum cpp_ttype type) | |
452 | { | |
453 | const struct builtin_operator *b; | |
454 | ||
455 | for (b = operator_array; | |
456 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
457 | b++) | |
458 | { | |
459 | if (type == b->value) | |
460 | return (const char *) b->name; | |
461 | } | |
462 | ||
463 | return NULL; | |
464 | } | |
465 | ||
c1bad961 | 466 | void |
ccfc4c91 | 467 | cpp_init_special_builtins (cpp_reader *pfile) |
a9ae4483 | 468 | { |
c047ce93 | 469 | const struct builtin_macro *b; |
278c4662 | 470 | size_t n = ARRAY_SIZE (builtin_array); |
771c4df3 | 471 | |
278c4662 NB |
472 | if (CPP_OPTION (pfile, traditional)) |
473 | n -= 2; | |
83900997 JJ |
474 | else if (! CPP_OPTION (pfile, stdc_0_in_system_headers) |
475 | || CPP_OPTION (pfile, std)) | |
ccfc4c91 | 476 | n--; |
278c4662 | 477 | |
83900997 | 478 | for (b = builtin_array; b < builtin_array + n; b++) |
6de1e2a9 | 479 | { |
1f8d3e84 JJ |
480 | if (b->value == BT_HAS_ATTRIBUTE |
481 | && (CPP_OPTION (pfile, lang) == CLK_ASM | |
482 | || pfile->cb.has_attribute == NULL)) | |
483 | continue; | |
f24a153a | 484 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
a570d97f | 485 | hp->type = NT_BUILTIN_MACRO; |
b753b37b | 486 | if (b->always_warn_if_redefined) |
c047ce93 | 487 | hp->flags |= NODE_WARN; |
7e5487a2 | 488 | hp->value.builtin = (enum cpp_builtin_type) b->value; |
6de1e2a9 | 489 | } |
ccfc4c91 OW |
490 | } |
491 | ||
492 | /* Read the builtins table above and enter them, and language-specific | |
493 | macros, into the hash table. HOSTED is true if this is a hosted | |
494 | environment. */ | |
495 | void | |
496 | cpp_init_builtins (cpp_reader *pfile, int hosted) | |
497 | { | |
498 | cpp_init_special_builtins (pfile); | |
499 | ||
500 | if (!CPP_OPTION (pfile, traditional) | |
501 | && (! CPP_OPTION (pfile, stdc_0_in_system_headers) | |
502 | || CPP_OPTION (pfile, std))) | |
503 | _cpp_define_builtin (pfile, "__STDC__ 1"); | |
c740cee2 NB |
504 | |
505 | if (CPP_OPTION (pfile, cplusplus)) | |
1fb80b0c | 506 | { |
026a79f7 AS |
507 | if (CPP_OPTION (pfile, lang) == CLK_CXX2A |
508 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX2A) | |
509 | _cpp_define_builtin (pfile, "__cplusplus 201709L"); | |
510 | else if (CPP_OPTION (pfile, lang) == CLK_CXX17 | |
7b936140 | 511 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX17) |
85e653c9 | 512 | _cpp_define_builtin (pfile, "__cplusplus 201703L"); |
e4276ba5 ESR |
513 | else if (CPP_OPTION (pfile, lang) == CLK_CXX14 |
514 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX14) | |
515 | _cpp_define_builtin (pfile, "__cplusplus 201402L"); | |
61949153 PC |
516 | else if (CPP_OPTION (pfile, lang) == CLK_CXX11 |
517 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX11) | |
1fb80b0c JM |
518 | _cpp_define_builtin (pfile, "__cplusplus 201103L"); |
519 | else | |
520 | _cpp_define_builtin (pfile, "__cplusplus 199711L"); | |
521 | } | |
2a1dc0d8 ZW |
522 | else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
523 | _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); | |
0f7866e7 | 524 | else if (CPP_OPTION (pfile, lang) == CLK_STDC94) |
c740cee2 | 525 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); |
9f936c86 JM |
526 | else if (CPP_OPTION (pfile, lang) == CLK_STDC2X |
527 | || CPP_OPTION (pfile, lang) == CLK_GNUC2X) | |
528 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 202000L"); | |
c76dc9c3 JM |
529 | else if (CPP_OPTION (pfile, lang) == CLK_STDC17 |
530 | || CPP_OPTION (pfile, lang) == CLK_GNUC17) | |
531 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 201710L"); | |
48b0b196 JM |
532 | else if (CPP_OPTION (pfile, lang) == CLK_STDC11 |
533 | || CPP_OPTION (pfile, lang) == CLK_GNUC11) | |
534 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 201112L"); | |
c740cee2 NB |
535 | else if (CPP_OPTION (pfile, c99)) |
536 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); | |
537 | ||
a48e3dd1 | 538 | if (CPP_OPTION (pfile, uliterals) |
e4276ba5 ESR |
539 | && !(CPP_OPTION (pfile, cplusplus) |
540 | && (CPP_OPTION (pfile, lang) == CLK_GNUCXX | |
541 | || CPP_OPTION (pfile, lang) == CLK_CXX98))) | |
a48e3dd1 JM |
542 | { |
543 | _cpp_define_builtin (pfile, "__STDC_UTF_16__ 1"); | |
544 | _cpp_define_builtin (pfile, "__STDC_UTF_32__ 1"); | |
545 | } | |
546 | ||
6e270179 | 547 | if (hosted) |
58b5b894 | 548 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1"); |
6e270179 | 549 | else |
58b5b894 | 550 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0"); |
6e270179 | 551 | |
0f7866e7 ZL |
552 | if (CPP_OPTION (pfile, objc)) |
553 | _cpp_define_builtin (pfile, "__OBJC__ 1"); | |
4a58aab6 NB |
554 | } |
555 | ||
2443d4e1 | 556 | /* Sanity-checks are dependent on command-line options, so it is |
174f6622 | 557 | called as a subroutine of cpp_read_main_file. */ |
22d66382 | 558 | #if CHECKING_P |
6cf87ca4 ZW |
559 | static void sanity_checks (cpp_reader *); |
560 | static void sanity_checks (cpp_reader *pfile) | |
2443d4e1 NB |
561 | { |
562 | cppchar_t test = 0; | |
c9220e3a | 563 | size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); |
2443d4e1 NB |
564 | |
565 | /* Sanity checks for assumptions about CPP arithmetic and target | |
566 | type precisions made by cpplib. */ | |
567 | test--; | |
568 | if (test < 1) | |
0527bc4e | 569 | cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type"); |
2443d4e1 | 570 | |
c9220e3a | 571 | if (CPP_OPTION (pfile, precision) > max_precision) |
0527bc4e | 572 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
573 | "preprocessor arithmetic has maximum precision of %lu bits;" |
574 | " target requires %lu bits", | |
c9220e3a NB |
575 | (unsigned long) max_precision, |
576 | (unsigned long) CPP_OPTION (pfile, precision)); | |
2443d4e1 NB |
577 | |
578 | if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) | |
0527bc4e | 579 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
580 | "CPP arithmetic must be at least as precise as a target int"); |
581 | ||
582 | if (CPP_OPTION (pfile, char_precision) < 8) | |
0527bc4e | 583 | cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide"); |
2443d4e1 NB |
584 | |
585 | if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 586 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
587 | "target wchar_t is narrower than target char"); |
588 | ||
589 | if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 590 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
591 | "target int is narrower than target char"); |
592 | ||
c9220e3a NB |
593 | /* This is assumed in eval_token() and could be fixed if necessary. */ |
594 | if (sizeof (cppchar_t) > sizeof (cpp_num_part)) | |
0527bc4e JDA |
595 | cpp_error (pfile, CPP_DL_ICE, |
596 | "CPP half-integer narrower than CPP character"); | |
c9220e3a | 597 | |
2443d4e1 | 598 | if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) |
0527bc4e | 599 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
600 | "CPP on this host cannot handle wide character constants over" |
601 | " %lu bits, but the target requires %lu bits", | |
c9220e3a NB |
602 | (unsigned long) BITS_PER_CPPCHAR_T, |
603 | (unsigned long) CPP_OPTION (pfile, wchar_precision)); | |
2443d4e1 NB |
604 | } |
605 | #else | |
606 | # define sanity_checks(PFILE) | |
607 | #endif | |
608 | ||
f5e99456 | 609 | /* This is called after options have been parsed, and partially |
59e4e217 | 610 | processed. */ |
4169c321 PB |
611 | void |
612 | cpp_post_options (cpp_reader *pfile) | |
6de1e2a9 | 613 | { |
3d8b2a98 ILT |
614 | int flags; |
615 | ||
2443d4e1 NB |
616 | sanity_checks (pfile); |
617 | ||
f4ff5a69 NB |
618 | post_options (pfile); |
619 | ||
c19b12cb | 620 | /* Mark named operators before handling command line macros. */ |
3d8b2a98 | 621 | flags = 0; |
c19b12cb | 622 | if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) |
3d8b2a98 ILT |
623 | flags |= NODE_OPERATOR; |
624 | if (CPP_OPTION (pfile, warn_cxx_operator_names)) | |
625 | flags |= NODE_DIAGNOSTIC | NODE_WARN_OPERATOR; | |
626 | if (flags != 0) | |
627 | mark_named_operators (pfile, flags); | |
4169c321 | 628 | } |
c19b12cb | 629 | |
4dc299fb | 630 | /* Setup for processing input from the file named FNAME, or stdin if |
8e9ea4d7 PB |
631 | it is the empty string. Return the original filename |
632 | on success (e.g. foo.i->foo.c), or NULL on failure. */ | |
633 | const char * | |
634 | cpp_read_main_file (cpp_reader *pfile, const char *fname) | |
4169c321 | 635 | { |
ac81cf0b DM |
636 | const source_location loc = 0; |
637 | ||
f4ff5a69 NB |
638 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
639 | { | |
640 | if (!pfile->deps) | |
641 | pfile->deps = deps_init (); | |
642 | ||
643 | /* Set the default target (if there is none already). */ | |
644 | deps_add_default_target (pfile->deps, fname); | |
645 | } | |
96302433 | 646 | |
4dc299fb | 647 | pfile->main_file |
ac81cf0b DM |
648 | = _cpp_find_file (pfile, fname, &pfile->no_search_path, false, 0, false, |
649 | loc); | |
4dc299fb | 650 | if (_cpp_find_failed (pfile->main_file)) |
3092d0fc | 651 | return NULL; |
f5e99456 | 652 | |
ac81cf0b | 653 | _cpp_stack_file (pfile, pfile->main_file, false, loc); |
4dc299fb PB |
654 | |
655 | /* For foo.i, read the original filename foo.c now, for the benefit | |
656 | of the front ends. */ | |
657 | if (CPP_OPTION (pfile, preprocessed)) | |
8e9ea4d7 PB |
658 | { |
659 | read_original_filename (pfile); | |
46427374 TT |
660 | fname = |
661 | ORDINARY_MAP_FILE_NAME | |
662 | ((LINEMAPS_LAST_ORDINARY_MAP (pfile->line_table))); | |
8e9ea4d7 PB |
663 | } |
664 | return fname; | |
f5e99456 NB |
665 | } |
666 | ||
667 | /* For preprocessed files, if the first tokens are of the form # NUM. | |
668 | handle the directive so we know the original file name. This will | |
669 | generate file_change callbacks, which the front ends must handle | |
670 | appropriately given their state of initialization. */ | |
671 | static void | |
6cf87ca4 | 672 | read_original_filename (cpp_reader *pfile) |
f5e99456 NB |
673 | { |
674 | const cpp_token *token, *token1; | |
675 | ||
676 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
677 | process the directive, otherwise back up. */ | |
678 | token = _cpp_lex_direct (pfile); | |
679 | if (token->type == CPP_HASH) | |
680 | { | |
456b8ce5 | 681 | pfile->state.in_directive = 1; |
f5e99456 NB |
682 | token1 = _cpp_lex_direct (pfile); |
683 | _cpp_backup_tokens (pfile, 1); | |
456b8ce5 | 684 | pfile->state.in_directive = 0; |
f5e99456 NB |
685 | |
686 | /* If it's a #line directive, handle it. */ | |
709d7160 JJ |
687 | if (token1->type == CPP_NUMBER |
688 | && _cpp_handle_directive (pfile, token->flags & PREV_WHITE)) | |
f5e99456 | 689 | { |
b20d9f0c | 690 | read_original_directory (pfile); |
f5e99456 NB |
691 | return; |
692 | } | |
693 | } | |
694 | ||
695 | /* Backup as if nothing happened. */ | |
696 | _cpp_backup_tokens (pfile, 1); | |
697 | } | |
698 | ||
b20d9f0c AO |
699 | /* For preprocessed files, if the tokens following the first filename |
700 | line is of the form # <line> "/path/name//", handle the | |
701 | directive so we know the original current directory. */ | |
702 | static void | |
703 | read_original_directory (cpp_reader *pfile) | |
704 | { | |
705 | const cpp_token *hash, *token; | |
706 | ||
707 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
708 | process the directive, otherwise back up. */ | |
709 | hash = _cpp_lex_direct (pfile); | |
710 | if (hash->type != CPP_HASH) | |
711 | { | |
712 | _cpp_backup_tokens (pfile, 1); | |
713 | return; | |
714 | } | |
715 | ||
716 | token = _cpp_lex_direct (pfile); | |
717 | ||
718 | if (token->type != CPP_NUMBER) | |
719 | { | |
720 | _cpp_backup_tokens (pfile, 2); | |
721 | return; | |
722 | } | |
723 | ||
724 | token = _cpp_lex_direct (pfile); | |
725 | ||
726 | if (token->type != CPP_STRING | |
727 | || ! (token->val.str.len >= 5 | |
4489800d KT |
728 | && IS_DIR_SEPARATOR (token->val.str.text[token->val.str.len-2]) |
729 | && IS_DIR_SEPARATOR (token->val.str.text[token->val.str.len-3]))) | |
b20d9f0c AO |
730 | { |
731 | _cpp_backup_tokens (pfile, 3); | |
732 | return; | |
733 | } | |
734 | ||
735 | if (pfile->cb.dir_change) | |
736 | { | |
c3f829c1 | 737 | char *debugdir = (char *) alloca (token->val.str.len - 3); |
b20d9f0c AO |
738 | |
739 | memcpy (debugdir, (const char *) token->val.str.text + 1, | |
740 | token->val.str.len - 4); | |
741 | debugdir[token->val.str.len - 4] = '\0'; | |
742 | ||
743 | pfile->cb.dir_change (pfile, debugdir); | |
8e9ea4d7 | 744 | } |
b20d9f0c AO |
745 | } |
746 | ||
76c3e73e | 747 | /* This is called at the end of preprocessing. It pops the last |
148e4216 | 748 | buffer and writes dependency output. |
16dd5cfe | 749 | |
76c3e73e NB |
750 | Maybe it should also reset state, such that you could call |
751 | cpp_start_read with a new filename to restart processing. */ | |
148e4216 | 752 | void |
6cf87ca4 | 753 | cpp_finish (cpp_reader *pfile, FILE *deps_stream) |
6de1e2a9 | 754 | { |
a69cbaac NB |
755 | /* Warn about unused macros before popping the final buffer. */ |
756 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
757 | cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); | |
758 | ||
a2566ae9 | 759 | /* lex.c leaves the final buffer on the stack. This it so that |
7364fdd8 | 760 | it returns an unending stream of CPP_EOFs to the client. If we |
a1f300c0 | 761 | popped the buffer, we'd dereference a NULL buffer pointer and |
7364fdd8 NB |
762 | segfault. It's nice to allow the client to do worry-free excess |
763 | cpp_get_token calls. */ | |
764 | while (pfile->buffer) | |
765 | _cpp_pop_buffer (pfile); | |
c1212d2f | 766 | |
f4ff5a69 | 767 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE |
148e4216 | 768 | && deps_stream) |
76c3e73e NB |
769 | { |
770 | deps_write (pfile->deps, deps_stream, 72); | |
771 | ||
f4ff5a69 | 772 | if (CPP_OPTION (pfile, deps.phony_targets)) |
76c3e73e NB |
773 | deps_phony_targets (pfile->deps, deps_stream); |
774 | } | |
3caee4a8 | 775 | |
d4506961 ZW |
776 | /* Report on headers that could use multiple include guards. */ |
777 | if (CPP_OPTION (pfile, print_include_names)) | |
c71f835b | 778 | _cpp_report_missing_guards (pfile); |
6de1e2a9 ZW |
779 | } |
780 | ||
f4ff5a69 | 781 | static void |
6cf87ca4 | 782 | post_options (cpp_reader *pfile) |
96302433 NB |
783 | { |
784 | /* -Wtraditional is not useful in C++ mode. */ | |
785 | if (CPP_OPTION (pfile, cplusplus)) | |
e3339d0f | 786 | CPP_OPTION (pfile, cpp_warn_traditional) = 0; |
96302433 | 787 | |
6d4587f7 | 788 | /* Permanently disable macro expansion if we are rescanning |
43612ffb | 789 | preprocessed text. Read preprocesed source in ISO mode. */ |
6d4587f7 | 790 | if (CPP_OPTION (pfile, preprocessed)) |
43612ffb | 791 | { |
ccfc4c91 OW |
792 | if (!CPP_OPTION (pfile, directives_only)) |
793 | pfile->state.prevent_expansion = 1; | |
43612ffb NB |
794 | CPP_OPTION (pfile, traditional) = 0; |
795 | } | |
796 | ||
a8eb6044 NB |
797 | if (CPP_OPTION (pfile, warn_trigraphs) == 2) |
798 | CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs); | |
799 | ||
43612ffb | 800 | if (CPP_OPTION (pfile, traditional)) |
26aea073 | 801 | { |
26aea073 NB |
802 | CPP_OPTION (pfile, trigraphs) = 0; |
803 | CPP_OPTION (pfile, warn_trigraphs) = 0; | |
804 | } | |
7ca3d2b1 | 805 | } |