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5538ada6 | 1 | /* CPP Library. |
cbe34bb5 | 2 | Copyright (C) 1986-2017 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; |
a01eb545 ZW |
94 | }; |
95 | ||
a01eb545 | 96 | static const struct lang_flags lang_defaults[] = |
fe95b036 ESR |
97 | { /* c99 c++ xnum xid c11 std digr ulit rlit udlit bincst digsep trig u8chlit */ |
98 | /* GNUC89 */ { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0 }, | |
99 | /* GNUC99 */ { 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0 }, | |
100 | /* GNUC11 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0 }, | |
c76dc9c3 | 101 | /* GNUC17 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0 }, |
fe95b036 ESR |
102 | /* STDC89 */ { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0 }, |
103 | /* STDC94 */ { 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0 }, | |
104 | /* STDC99 */ { 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0 }, | |
105 | /* STDC11 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0 }, | |
c76dc9c3 | 106 | /* STDC17 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0 }, |
fe95b036 ESR |
107 | /* GNUCXX */ { 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0 }, |
108 | /* CXX98 */ { 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0 }, | |
109 | /* GNUCXX11 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0 }, | |
2aaeea19 | 110 | /* CXX11 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0 }, |
fe95b036 | 111 | /* GNUCXX14 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0 }, |
2aaeea19 | 112 | /* CXX14 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0 }, |
7b936140 JJ |
113 | /* GNUCXX17 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1 }, |
114 | /* CXX17 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1 }, | |
026a79f7 AS |
115 | /* GNUCXX2A */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1 }, |
116 | /* CXX2A */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1 }, | |
fe95b036 | 117 | /* ASM */ { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } |
a01eb545 ZW |
118 | }; |
119 | ||
5d8ebbd8 | 120 | /* Sets internal flags correctly for a given language. */ |
f749a36b | 121 | void |
6cf87ca4 | 122 | cpp_set_lang (cpp_reader *pfile, enum c_lang lang) |
dd07b884 | 123 | { |
a01eb545 | 124 | const struct lang_flags *l = &lang_defaults[(int) lang]; |
df383483 | 125 | |
bdb05a7b | 126 | CPP_OPTION (pfile, lang) = lang; |
dd07b884 | 127 | |
af15a2fe JM |
128 | CPP_OPTION (pfile, c99) = l->c99; |
129 | CPP_OPTION (pfile, cplusplus) = l->cplusplus; | |
130 | CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; | |
131 | CPP_OPTION (pfile, extended_identifiers) = l->extended_identifiers; | |
d3f4ff8b | 132 | CPP_OPTION (pfile, c11_identifiers) = l->c11_identifiers; |
af15a2fe | 133 | CPP_OPTION (pfile, std) = l->std; |
af15a2fe | 134 | CPP_OPTION (pfile, digraphs) = l->digraphs; |
b6baa67d | 135 | CPP_OPTION (pfile, uliterals) = l->uliterals; |
a48e3dd1 | 136 | CPP_OPTION (pfile, rliterals) = l->rliterals; |
3ce4f9e4 | 137 | CPP_OPTION (pfile, user_literals) = l->user_literals; |
01187df0 | 138 | CPP_OPTION (pfile, binary_constants) = l->binary_constants; |
7057e645 | 139 | CPP_OPTION (pfile, digit_separators) = l->digit_separators; |
e4276ba5 | 140 | CPP_OPTION (pfile, trigraphs) = l->trigraphs; |
fe95b036 | 141 | CPP_OPTION (pfile, utf8_char_literals) = l->utf8_char_literals; |
dd07b884 NB |
142 | } |
143 | ||
c1bad961 | 144 | /* Initialize library global state. */ |
cf44ea52 | 145 | static void |
6cf87ca4 | 146 | init_library (void) |
cf44ea52 | 147 | { |
7ca3d2b1 NB |
148 | static int initialized = 0; |
149 | ||
150 | if (! initialized) | |
151 | { | |
152 | initialized = 1; | |
153 | ||
b0c084b7 JJ |
154 | _cpp_init_lexer (); |
155 | ||
7ca3d2b1 NB |
156 | /* Set up the trigraph map. This doesn't need to do anything if |
157 | we were compiled with a compiler that supports C99 designated | |
158 | initializers. */ | |
159 | init_trigraph_map (); | |
4f4e53dd PB |
160 | |
161 | #ifdef ENABLE_NLS | |
85eac2a0 | 162 | (void) bindtextdomain (PACKAGE, LOCALEDIR); |
4f4e53dd | 163 | #endif |
7ca3d2b1 | 164 | } |
cf44ea52 NB |
165 | } |
166 | ||
ec5c56db | 167 | /* Initialize a cpp_reader structure. */ |
cf44ea52 | 168 | cpp_reader * |
0823efed | 169 | cpp_create_reader (enum c_lang lang, cpp_hash_table *table, |
50f59cd7 | 170 | struct line_maps *line_table) |
6de1e2a9 | 171 | { |
7ca3d2b1 | 172 | cpp_reader *pfile; |
93c80368 | 173 | |
4912a07c | 174 | /* Initialize this instance of the library if it hasn't been already. */ |
674c3b40 | 175 | init_library (); |
7ca3d2b1 | 176 | |
c3f829c1 | 177 | pfile = XCNEW (cpp_reader); |
92582b75 | 178 | memset (&pfile->base_context, 0, sizeof (pfile->base_context)); |
93c80368 | 179 | |
f749a36b | 180 | cpp_set_lang (pfile, lang); |
a5a49440 | 181 | CPP_OPTION (pfile, warn_multichar) = 1; |
ae79697b | 182 | CPP_OPTION (pfile, discard_comments) = 1; |
477cdac7 | 183 | CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; |
6ab3e7dd | 184 | CPP_OPTION (pfile, tabstop) = 8; |
be768055 | 185 | CPP_OPTION (pfile, operator_names) = 1; |
a8eb6044 | 186 | CPP_OPTION (pfile, warn_trigraphs) = 2; |
909de5da | 187 | CPP_OPTION (pfile, warn_endif_labels) = 1; |
2b71f4a4 | 188 | CPP_OPTION (pfile, cpp_warn_c90_c99_compat) = -1; |
fe191308 | 189 | CPP_OPTION (pfile, cpp_warn_cxx11_compat) = 0; |
e3339d0f JM |
190 | CPP_OPTION (pfile, cpp_warn_deprecated) = 1; |
191 | CPP_OPTION (pfile, cpp_warn_long_long) = 0; | |
b1822ccc | 192 | CPP_OPTION (pfile, dollars_in_ident) = 1; |
78b8811a | 193 | CPP_OPTION (pfile, warn_dollars) = 1; |
e5b79219 | 194 | CPP_OPTION (pfile, warn_variadic_macros) = 1; |
c047ce93 | 195 | CPP_OPTION (pfile, warn_builtin_macro_redefined) = 1; |
70f6d5e1 | 196 | CPP_OPTION (pfile, cpp_warn_implicit_fallthrough) = 0; |
51fce2d3 DS |
197 | /* By default, track locations of tokens resulting from macro |
198 | expansion. The '2' means, track the locations with the highest | |
199 | accuracy. Read the comments for struct | |
200 | cpp_options::track_macro_expansion to learn about the other | |
201 | values. */ | |
202 | CPP_OPTION (pfile, track_macro_expansion) = 2; | |
50668cf6 | 203 | CPP_OPTION (pfile, warn_normalize) = normalized_C; |
7f5f5f98 | 204 | CPP_OPTION (pfile, warn_literal_suffix) = 1; |
5dc99c46 SB |
205 | CPP_OPTION (pfile, canonical_system_headers) |
206 | = ENABLE_CANONICAL_SYSTEM_HEADERS; | |
a4a0016d | 207 | CPP_OPTION (pfile, ext_numeric_literals) = 1; |
e8ff5196 | 208 | CPP_OPTION (pfile, warn_date_time) = 0; |
ae79697b | 209 | |
2443d4e1 NB |
210 | /* Default CPP arithmetic to something sensible for the host for the |
211 | benefit of dumb users like fix-header. */ | |
c9220e3a | 212 | CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); |
2443d4e1 NB |
213 | CPP_OPTION (pfile, char_precision) = CHAR_BIT; |
214 | CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); | |
215 | CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); | |
2a1dc0d8 | 216 | CPP_OPTION (pfile, unsigned_char) = 0; |
44a147ad | 217 | CPP_OPTION (pfile, unsigned_wchar) = 1; |
e6cc3a24 ZW |
218 | CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */ |
219 | ||
220 | /* Default to no charset conversion. */ | |
16dd5cfe | 221 | CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding (); |
e6cc3a24 | 222 | CPP_OPTION (pfile, wide_charset) = 0; |
4268e8bb | 223 | |
16dd5cfe EC |
224 | /* Default the input character set to UTF-8. */ |
225 | CPP_OPTION (pfile, input_charset) = _cpp_default_encoding (); | |
cf551fba | 226 | |
8f9b4009 NB |
227 | /* A fake empty "directory" used as the starting point for files |
228 | looked up without a search path. Name cannot be '/' because we | |
229 | don't want to prepend anything at all to filenames using it. All | |
230 | other entries are correct zero-initialized. */ | |
231 | pfile->no_search_path.name = (char *) ""; | |
232 | ||
500bee0a | 233 | /* Initialize the line map. */ |
50f59cd7 | 234 | pfile->line_table = line_table; |
d82fc108 | 235 | |
4a58aab6 | 236 | /* Initialize lexer state. */ |
93c80368 NB |
237 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
238 | ||
4ed5bcfb | 239 | /* Set up static tokens. */ |
4ed5bcfb NB |
240 | pfile->avoid_paste.type = CPP_PADDING; |
241 | pfile->avoid_paste.val.source = NULL; | |
242 | pfile->eof.type = CPP_EOF; | |
243 | pfile->eof.flags = 0; | |
93c80368 | 244 | |
5fddcffc NB |
245 | /* Create a token buffer for the lexer. */ |
246 | _cpp_init_tokenrun (&pfile->base_run, 250); | |
247 | pfile->cur_run = &pfile->base_run; | |
248 | pfile->cur_token = pfile->base_run.base; | |
5fddcffc | 249 | |
4912a07c | 250 | /* Initialize the base context. */ |
93c80368 | 251 | pfile->context = &pfile->base_context; |
92582b75 | 252 | pfile->base_context.c.macro = 0; |
93c80368 NB |
253 | pfile->base_context.prev = pfile->base_context.next = 0; |
254 | ||
8c3b2693 NB |
255 | /* Aligned and unaligned storage. */ |
256 | pfile->a_buff = _cpp_get_buff (pfile, 0); | |
ece54d54 | 257 | pfile->u_buff = _cpp_get_buff (pfile, 0); |
93c80368 | 258 | |
17e7cb85 KT |
259 | /* Initialize table for push_macro/pop_macro. */ |
260 | pfile->pushed_macros = 0; | |
261 | ||
e3dfef44 GC |
262 | /* Do not force token locations by default. */ |
263 | pfile->forced_token_location_p = NULL; | |
264 | ||
15c98b2e ES |
265 | /* Initialize source_date_epoch to -2 (not yet set). */ |
266 | pfile->source_date_epoch = (time_t) -2; | |
267 | ||
87ed109f NB |
268 | /* The expression parser stack. */ |
269 | _cpp_expand_op_stack (pfile); | |
270 | ||
4912a07c | 271 | /* Initialize the buffer obstack. */ |
19a9ba64 | 272 | obstack_specify_allocation (&pfile->buffer_ob, 0, 0, xmalloc, free); |
2a967f3d | 273 | |
8f9b4009 | 274 | _cpp_init_files (pfile); |
cf44ea52 | 275 | |
b4e46cea PB |
276 | _cpp_init_hashtable (pfile, table); |
277 | ||
cf44ea52 | 278 | return pfile; |
f2d5f0cc ZW |
279 | } |
280 | ||
5ffeb913 TT |
281 | /* Set the line_table entry in PFILE. This is called after reading a |
282 | PCH file, as the old line_table will be incorrect. */ | |
283 | void | |
284 | cpp_set_line_map (cpp_reader *pfile, struct line_maps *line_table) | |
285 | { | |
286 | pfile->line_table = line_table; | |
287 | } | |
288 | ||
400023a3 | 289 | /* Free resources used by PFILE. Accessing PFILE after this function |
8d9afc4e | 290 | returns leads to undefined behavior. Returns the error count. */ |
76c3e73e | 291 | void |
6cf87ca4 | 292 | cpp_destroy (cpp_reader *pfile) |
6de1e2a9 | 293 | { |
93c80368 | 294 | cpp_context *context, *contextn; |
17e7cb85 | 295 | struct def_pragma_macro *pmacro; |
50410426 | 296 | tokenrun *run, *runn; |
631d0d36 | 297 | int i; |
709e9e50 | 298 | |
87ed109f | 299 | free (pfile->op_stack); |
af0d16cd | 300 | |
38b24ee2 | 301 | while (CPP_BUFFER (pfile) != NULL) |
ef6e958a | 302 | _cpp_pop_buffer (pfile); |
6de1e2a9 | 303 | |
04695783 | 304 | free (pfile->out.base); |
004cb263 | 305 | |
93c80368 | 306 | if (pfile->macro_buffer) |
4b49c365 | 307 | { |
fad205ff | 308 | free (pfile->macro_buffer); |
4b49c365 AO |
309 | pfile->macro_buffer = NULL; |
310 | pfile->macro_buffer_len = 0; | |
311 | } | |
93c80368 | 312 | |
f4ff5a69 NB |
313 | if (pfile->deps) |
314 | deps_free (pfile->deps); | |
2a967f3d | 315 | obstack_free (&pfile->buffer_ob, 0); |
49e6c08e | 316 | |
2a967f3d | 317 | _cpp_destroy_hashtable (pfile); |
8f9b4009 | 318 | _cpp_cleanup_files (pfile); |
e6cc3a24 | 319 | _cpp_destroy_iconv (pfile); |
709e9e50 | 320 | |
8c3b2693 | 321 | _cpp_free_buff (pfile->a_buff); |
ece54d54 | 322 | _cpp_free_buff (pfile->u_buff); |
b8af0ca5 | 323 | _cpp_free_buff (pfile->free_buffs); |
93c80368 | 324 | |
50410426 NB |
325 | for (run = &pfile->base_run; run; run = runn) |
326 | { | |
327 | runn = run->next; | |
328 | free (run->base); | |
329 | if (run != &pfile->base_run) | |
330 | free (run); | |
331 | } | |
332 | ||
93c80368 NB |
333 | for (context = pfile->base_context.next; context; context = contextn) |
334 | { | |
335 | contextn = context->next; | |
336 | free (context); | |
337 | } | |
400023a3 | 338 | |
631d0d36 MG |
339 | if (pfile->comments.entries) |
340 | { | |
341 | for (i = 0; i < pfile->comments.count; i++) | |
342 | free (pfile->comments.entries[i].comment); | |
343 | ||
344 | free (pfile->comments.entries); | |
345 | } | |
17e7cb85 KT |
346 | if (pfile->pushed_macros) |
347 | { | |
348 | do | |
349 | { | |
350 | pmacro = pfile->pushed_macros; | |
351 | pfile->pushed_macros = pmacro->next; | |
352 | free (pmacro->name); | |
353 | free (pmacro); | |
354 | } | |
355 | while (pfile->pushed_macros); | |
356 | } | |
631d0d36 | 357 | |
400023a3 | 358 | free (pfile); |
6de1e2a9 ZW |
359 | } |
360 | ||
93c80368 | 361 | /* This structure defines one built-in identifier. A node will be |
f24a153a ZW |
362 | entered in the hash table under the name NAME, with value VALUE. |
363 | ||
364 | There are two tables of these. builtin_array holds all the | |
365 | "builtin" macros: these are handled by builtin_macro() in | |
a2566ae9 | 366 | macro.c. Builtin is somewhat of a misnomer -- the property of |
f24a153a | 367 | interest is that these macros require special code to compute their |
128465e6 | 368 | expansions. The value is a "cpp_builtin_type" enumerator. |
f24a153a ZW |
369 | |
370 | operator_array holds the C++ named operators. These are keywords | |
371 | which act as aliases for punctuators. In C++, they cannot be | |
372 | altered through #define, and #if recognizes them as operators. In | |
373 | C, these are not entered into the hash table at all (but see | |
374 | <iso646.h>). The value is a token-type enumerator. */ | |
c047ce93 | 375 | struct builtin_macro |
a9ae4483 | 376 | { |
c047ce93 SB |
377 | const uchar *const name; |
378 | const unsigned short len; | |
379 | const unsigned short value; | |
380 | const bool always_warn_if_redefined; | |
a9ae4483 | 381 | }; |
93c80368 | 382 | |
c047ce93 SB |
383 | #define B(n, t, f) { DSC(n), t, f } |
384 | static const struct builtin_macro builtin_array[] = | |
6de1e2a9 | 385 | { |
c047ce93 SB |
386 | B("__TIMESTAMP__", BT_TIMESTAMP, false), |
387 | B("__TIME__", BT_TIME, false), | |
388 | B("__DATE__", BT_DATE, false), | |
389 | B("__FILE__", BT_FILE, false), | |
390 | B("__BASE_FILE__", BT_BASE_FILE, false), | |
391 | B("__LINE__", BT_SPECLINE, true), | |
392 | B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL, true), | |
393 | B("__COUNTER__", BT_COUNTER, true), | |
1f8d3e84 JJ |
394 | B("__has_attribute", BT_HAS_ATTRIBUTE, true), |
395 | B("__has_cpp_attribute", BT_HAS_ATTRIBUTE, true), | |
278c4662 NB |
396 | /* Keep builtins not used for -traditional-cpp at the end, and |
397 | update init_builtins() if any more are added. */ | |
c047ce93 SB |
398 | B("_Pragma", BT_PRAGMA, true), |
399 | B("__STDC__", BT_STDC, true), | |
400 | }; | |
401 | #undef B | |
402 | ||
403 | struct builtin_operator | |
404 | { | |
405 | const uchar *const name; | |
406 | const unsigned short len; | |
407 | const unsigned short value; | |
f24a153a | 408 | }; |
92936ecf | 409 | |
c047ce93 SB |
410 | #define B(n, t) { DSC(n), t } |
411 | static const struct builtin_operator operator_array[] = | |
f24a153a ZW |
412 | { |
413 | B("and", CPP_AND_AND), | |
414 | B("and_eq", CPP_AND_EQ), | |
415 | B("bitand", CPP_AND), | |
416 | B("bitor", CPP_OR), | |
417 | B("compl", CPP_COMPL), | |
418 | B("not", CPP_NOT), | |
419 | B("not_eq", CPP_NOT_EQ), | |
420 | B("or", CPP_OR_OR), | |
421 | B("or_eq", CPP_OR_EQ), | |
422 | B("xor", CPP_XOR), | |
423 | B("xor_eq", CPP_XOR_EQ) | |
a9ae4483 | 424 | }; |
12cf91fe | 425 | #undef B |
a9ae4483 | 426 | |
17645b15 NB |
427 | /* Mark the C++ named operators in the hash table. */ |
428 | static void | |
3d8b2a98 | 429 | mark_named_operators (cpp_reader *pfile, int flags) |
17645b15 | 430 | { |
c047ce93 | 431 | const struct builtin_operator *b; |
17645b15 NB |
432 | |
433 | for (b = operator_array; | |
434 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
435 | b++) | |
436 | { | |
437 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
3d8b2a98 | 438 | hp->flags |= flags; |
4977bab6 ZW |
439 | hp->is_directive = 0; |
440 | hp->directive_index = b->value; | |
17645b15 NB |
441 | } |
442 | } | |
443 | ||
cfc93532 MLI |
444 | /* Helper function of cpp_type2name. Return the string associated with |
445 | named operator TYPE. */ | |
446 | const char * | |
447 | cpp_named_operator2name (enum cpp_ttype type) | |
448 | { | |
449 | const struct builtin_operator *b; | |
450 | ||
451 | for (b = operator_array; | |
452 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
453 | b++) | |
454 | { | |
455 | if (type == b->value) | |
456 | return (const char *) b->name; | |
457 | } | |
458 | ||
459 | return NULL; | |
460 | } | |
461 | ||
c1bad961 | 462 | void |
ccfc4c91 | 463 | cpp_init_special_builtins (cpp_reader *pfile) |
a9ae4483 | 464 | { |
c047ce93 | 465 | const struct builtin_macro *b; |
278c4662 | 466 | size_t n = ARRAY_SIZE (builtin_array); |
771c4df3 | 467 | |
278c4662 NB |
468 | if (CPP_OPTION (pfile, traditional)) |
469 | n -= 2; | |
83900997 JJ |
470 | else if (! CPP_OPTION (pfile, stdc_0_in_system_headers) |
471 | || CPP_OPTION (pfile, std)) | |
ccfc4c91 | 472 | n--; |
278c4662 | 473 | |
83900997 | 474 | for (b = builtin_array; b < builtin_array + n; b++) |
6de1e2a9 | 475 | { |
1f8d3e84 JJ |
476 | if (b->value == BT_HAS_ATTRIBUTE |
477 | && (CPP_OPTION (pfile, lang) == CLK_ASM | |
478 | || pfile->cb.has_attribute == NULL)) | |
479 | continue; | |
f24a153a ZW |
480 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
481 | hp->type = NT_MACRO; | |
c047ce93 | 482 | hp->flags |= NODE_BUILTIN; |
b753b37b | 483 | if (b->always_warn_if_redefined) |
c047ce93 | 484 | hp->flags |= NODE_WARN; |
7e5487a2 | 485 | hp->value.builtin = (enum cpp_builtin_type) b->value; |
6de1e2a9 | 486 | } |
ccfc4c91 OW |
487 | } |
488 | ||
489 | /* Read the builtins table above and enter them, and language-specific | |
490 | macros, into the hash table. HOSTED is true if this is a hosted | |
491 | environment. */ | |
492 | void | |
493 | cpp_init_builtins (cpp_reader *pfile, int hosted) | |
494 | { | |
495 | cpp_init_special_builtins (pfile); | |
496 | ||
497 | if (!CPP_OPTION (pfile, traditional) | |
498 | && (! CPP_OPTION (pfile, stdc_0_in_system_headers) | |
499 | || CPP_OPTION (pfile, std))) | |
500 | _cpp_define_builtin (pfile, "__STDC__ 1"); | |
c740cee2 NB |
501 | |
502 | if (CPP_OPTION (pfile, cplusplus)) | |
1fb80b0c | 503 | { |
026a79f7 AS |
504 | if (CPP_OPTION (pfile, lang) == CLK_CXX2A |
505 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX2A) | |
506 | _cpp_define_builtin (pfile, "__cplusplus 201709L"); | |
507 | else if (CPP_OPTION (pfile, lang) == CLK_CXX17 | |
7b936140 | 508 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX17) |
85e653c9 | 509 | _cpp_define_builtin (pfile, "__cplusplus 201703L"); |
e4276ba5 ESR |
510 | else if (CPP_OPTION (pfile, lang) == CLK_CXX14 |
511 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX14) | |
512 | _cpp_define_builtin (pfile, "__cplusplus 201402L"); | |
61949153 PC |
513 | else if (CPP_OPTION (pfile, lang) == CLK_CXX11 |
514 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX11) | |
1fb80b0c JM |
515 | _cpp_define_builtin (pfile, "__cplusplus 201103L"); |
516 | else | |
517 | _cpp_define_builtin (pfile, "__cplusplus 199711L"); | |
518 | } | |
2a1dc0d8 ZW |
519 | else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
520 | _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); | |
0f7866e7 | 521 | else if (CPP_OPTION (pfile, lang) == CLK_STDC94) |
c740cee2 | 522 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); |
c76dc9c3 JM |
523 | else if (CPP_OPTION (pfile, lang) == CLK_STDC17 |
524 | || CPP_OPTION (pfile, lang) == CLK_GNUC17) | |
525 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 201710L"); | |
48b0b196 JM |
526 | else if (CPP_OPTION (pfile, lang) == CLK_STDC11 |
527 | || CPP_OPTION (pfile, lang) == CLK_GNUC11) | |
528 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 201112L"); | |
c740cee2 NB |
529 | else if (CPP_OPTION (pfile, c99)) |
530 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); | |
531 | ||
a48e3dd1 | 532 | if (CPP_OPTION (pfile, uliterals) |
e4276ba5 ESR |
533 | && !(CPP_OPTION (pfile, cplusplus) |
534 | && (CPP_OPTION (pfile, lang) == CLK_GNUCXX | |
535 | || CPP_OPTION (pfile, lang) == CLK_CXX98))) | |
a48e3dd1 JM |
536 | { |
537 | _cpp_define_builtin (pfile, "__STDC_UTF_16__ 1"); | |
538 | _cpp_define_builtin (pfile, "__STDC_UTF_32__ 1"); | |
539 | } | |
540 | ||
6e270179 | 541 | if (hosted) |
58b5b894 | 542 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1"); |
6e270179 | 543 | else |
58b5b894 | 544 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0"); |
6e270179 | 545 | |
0f7866e7 ZL |
546 | if (CPP_OPTION (pfile, objc)) |
547 | _cpp_define_builtin (pfile, "__OBJC__ 1"); | |
4a58aab6 NB |
548 | } |
549 | ||
2443d4e1 | 550 | /* Sanity-checks are dependent on command-line options, so it is |
174f6622 | 551 | called as a subroutine of cpp_read_main_file. */ |
22d66382 | 552 | #if CHECKING_P |
6cf87ca4 ZW |
553 | static void sanity_checks (cpp_reader *); |
554 | static void sanity_checks (cpp_reader *pfile) | |
2443d4e1 NB |
555 | { |
556 | cppchar_t test = 0; | |
c9220e3a | 557 | size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); |
2443d4e1 NB |
558 | |
559 | /* Sanity checks for assumptions about CPP arithmetic and target | |
560 | type precisions made by cpplib. */ | |
561 | test--; | |
562 | if (test < 1) | |
0527bc4e | 563 | cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type"); |
2443d4e1 | 564 | |
c9220e3a | 565 | if (CPP_OPTION (pfile, precision) > max_precision) |
0527bc4e | 566 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
567 | "preprocessor arithmetic has maximum precision of %lu bits;" |
568 | " target requires %lu bits", | |
c9220e3a NB |
569 | (unsigned long) max_precision, |
570 | (unsigned long) CPP_OPTION (pfile, precision)); | |
2443d4e1 NB |
571 | |
572 | if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) | |
0527bc4e | 573 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
574 | "CPP arithmetic must be at least as precise as a target int"); |
575 | ||
576 | if (CPP_OPTION (pfile, char_precision) < 8) | |
0527bc4e | 577 | cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide"); |
2443d4e1 NB |
578 | |
579 | if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 580 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
581 | "target wchar_t is narrower than target char"); |
582 | ||
583 | if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 584 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
585 | "target int is narrower than target char"); |
586 | ||
c9220e3a NB |
587 | /* This is assumed in eval_token() and could be fixed if necessary. */ |
588 | if (sizeof (cppchar_t) > sizeof (cpp_num_part)) | |
0527bc4e JDA |
589 | cpp_error (pfile, CPP_DL_ICE, |
590 | "CPP half-integer narrower than CPP character"); | |
c9220e3a | 591 | |
2443d4e1 | 592 | if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) |
0527bc4e | 593 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
594 | "CPP on this host cannot handle wide character constants over" |
595 | " %lu bits, but the target requires %lu bits", | |
c9220e3a NB |
596 | (unsigned long) BITS_PER_CPPCHAR_T, |
597 | (unsigned long) CPP_OPTION (pfile, wchar_precision)); | |
2443d4e1 NB |
598 | } |
599 | #else | |
600 | # define sanity_checks(PFILE) | |
601 | #endif | |
602 | ||
f5e99456 | 603 | /* This is called after options have been parsed, and partially |
59e4e217 | 604 | processed. */ |
4169c321 PB |
605 | void |
606 | cpp_post_options (cpp_reader *pfile) | |
6de1e2a9 | 607 | { |
3d8b2a98 ILT |
608 | int flags; |
609 | ||
2443d4e1 NB |
610 | sanity_checks (pfile); |
611 | ||
f4ff5a69 NB |
612 | post_options (pfile); |
613 | ||
c19b12cb | 614 | /* Mark named operators before handling command line macros. */ |
3d8b2a98 | 615 | flags = 0; |
c19b12cb | 616 | if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) |
3d8b2a98 ILT |
617 | flags |= NODE_OPERATOR; |
618 | if (CPP_OPTION (pfile, warn_cxx_operator_names)) | |
619 | flags |= NODE_DIAGNOSTIC | NODE_WARN_OPERATOR; | |
620 | if (flags != 0) | |
621 | mark_named_operators (pfile, flags); | |
4169c321 | 622 | } |
c19b12cb | 623 | |
4dc299fb | 624 | /* Setup for processing input from the file named FNAME, or stdin if |
8e9ea4d7 PB |
625 | it is the empty string. Return the original filename |
626 | on success (e.g. foo.i->foo.c), or NULL on failure. */ | |
627 | const char * | |
628 | cpp_read_main_file (cpp_reader *pfile, const char *fname) | |
4169c321 | 629 | { |
ac81cf0b DM |
630 | const source_location loc = 0; |
631 | ||
f4ff5a69 NB |
632 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
633 | { | |
634 | if (!pfile->deps) | |
635 | pfile->deps = deps_init (); | |
636 | ||
637 | /* Set the default target (if there is none already). */ | |
638 | deps_add_default_target (pfile->deps, fname); | |
639 | } | |
96302433 | 640 | |
4dc299fb | 641 | pfile->main_file |
ac81cf0b DM |
642 | = _cpp_find_file (pfile, fname, &pfile->no_search_path, false, 0, false, |
643 | loc); | |
4dc299fb | 644 | if (_cpp_find_failed (pfile->main_file)) |
3092d0fc | 645 | return NULL; |
f5e99456 | 646 | |
ac81cf0b | 647 | _cpp_stack_file (pfile, pfile->main_file, false, loc); |
4dc299fb PB |
648 | |
649 | /* For foo.i, read the original filename foo.c now, for the benefit | |
650 | of the front ends. */ | |
651 | if (CPP_OPTION (pfile, preprocessed)) | |
8e9ea4d7 PB |
652 | { |
653 | read_original_filename (pfile); | |
46427374 TT |
654 | fname = |
655 | ORDINARY_MAP_FILE_NAME | |
656 | ((LINEMAPS_LAST_ORDINARY_MAP (pfile->line_table))); | |
8e9ea4d7 PB |
657 | } |
658 | return fname; | |
f5e99456 NB |
659 | } |
660 | ||
661 | /* For preprocessed files, if the first tokens are of the form # NUM. | |
662 | handle the directive so we know the original file name. This will | |
663 | generate file_change callbacks, which the front ends must handle | |
664 | appropriately given their state of initialization. */ | |
665 | static void | |
6cf87ca4 | 666 | read_original_filename (cpp_reader *pfile) |
f5e99456 NB |
667 | { |
668 | const cpp_token *token, *token1; | |
669 | ||
670 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
671 | process the directive, otherwise back up. */ | |
672 | token = _cpp_lex_direct (pfile); | |
673 | if (token->type == CPP_HASH) | |
674 | { | |
456b8ce5 | 675 | pfile->state.in_directive = 1; |
f5e99456 NB |
676 | token1 = _cpp_lex_direct (pfile); |
677 | _cpp_backup_tokens (pfile, 1); | |
456b8ce5 | 678 | pfile->state.in_directive = 0; |
f5e99456 NB |
679 | |
680 | /* If it's a #line directive, handle it. */ | |
709d7160 JJ |
681 | if (token1->type == CPP_NUMBER |
682 | && _cpp_handle_directive (pfile, token->flags & PREV_WHITE)) | |
f5e99456 | 683 | { |
b20d9f0c | 684 | read_original_directory (pfile); |
f5e99456 NB |
685 | return; |
686 | } | |
687 | } | |
688 | ||
689 | /* Backup as if nothing happened. */ | |
690 | _cpp_backup_tokens (pfile, 1); | |
691 | } | |
692 | ||
b20d9f0c AO |
693 | /* For preprocessed files, if the tokens following the first filename |
694 | line is of the form # <line> "/path/name//", handle the | |
695 | directive so we know the original current directory. */ | |
696 | static void | |
697 | read_original_directory (cpp_reader *pfile) | |
698 | { | |
699 | const cpp_token *hash, *token; | |
700 | ||
701 | /* Lex ahead; if the first tokens are of the form # NUM, then | |
702 | process the directive, otherwise back up. */ | |
703 | hash = _cpp_lex_direct (pfile); | |
704 | if (hash->type != CPP_HASH) | |
705 | { | |
706 | _cpp_backup_tokens (pfile, 1); | |
707 | return; | |
708 | } | |
709 | ||
710 | token = _cpp_lex_direct (pfile); | |
711 | ||
712 | if (token->type != CPP_NUMBER) | |
713 | { | |
714 | _cpp_backup_tokens (pfile, 2); | |
715 | return; | |
716 | } | |
717 | ||
718 | token = _cpp_lex_direct (pfile); | |
719 | ||
720 | if (token->type != CPP_STRING | |
721 | || ! (token->val.str.len >= 5 | |
4489800d KT |
722 | && IS_DIR_SEPARATOR (token->val.str.text[token->val.str.len-2]) |
723 | && IS_DIR_SEPARATOR (token->val.str.text[token->val.str.len-3]))) | |
b20d9f0c AO |
724 | { |
725 | _cpp_backup_tokens (pfile, 3); | |
726 | return; | |
727 | } | |
728 | ||
729 | if (pfile->cb.dir_change) | |
730 | { | |
c3f829c1 | 731 | char *debugdir = (char *) alloca (token->val.str.len - 3); |
b20d9f0c AO |
732 | |
733 | memcpy (debugdir, (const char *) token->val.str.text + 1, | |
734 | token->val.str.len - 4); | |
735 | debugdir[token->val.str.len - 4] = '\0'; | |
736 | ||
737 | pfile->cb.dir_change (pfile, debugdir); | |
8e9ea4d7 | 738 | } |
b20d9f0c AO |
739 | } |
740 | ||
76c3e73e | 741 | /* This is called at the end of preprocessing. It pops the last |
148e4216 | 742 | buffer and writes dependency output. |
16dd5cfe | 743 | |
76c3e73e NB |
744 | Maybe it should also reset state, such that you could call |
745 | cpp_start_read with a new filename to restart processing. */ | |
148e4216 | 746 | void |
6cf87ca4 | 747 | cpp_finish (cpp_reader *pfile, FILE *deps_stream) |
6de1e2a9 | 748 | { |
a69cbaac NB |
749 | /* Warn about unused macros before popping the final buffer. */ |
750 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
751 | cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); | |
752 | ||
a2566ae9 | 753 | /* lex.c leaves the final buffer on the stack. This it so that |
7364fdd8 | 754 | it returns an unending stream of CPP_EOFs to the client. If we |
a1f300c0 | 755 | popped the buffer, we'd dereference a NULL buffer pointer and |
7364fdd8 NB |
756 | segfault. It's nice to allow the client to do worry-free excess |
757 | cpp_get_token calls. */ | |
758 | while (pfile->buffer) | |
759 | _cpp_pop_buffer (pfile); | |
c1212d2f | 760 | |
f4ff5a69 | 761 | if (CPP_OPTION (pfile, deps.style) != DEPS_NONE |
148e4216 | 762 | && deps_stream) |
76c3e73e NB |
763 | { |
764 | deps_write (pfile->deps, deps_stream, 72); | |
765 | ||
f4ff5a69 | 766 | if (CPP_OPTION (pfile, deps.phony_targets)) |
76c3e73e NB |
767 | deps_phony_targets (pfile->deps, deps_stream); |
768 | } | |
3caee4a8 | 769 | |
d4506961 ZW |
770 | /* Report on headers that could use multiple include guards. */ |
771 | if (CPP_OPTION (pfile, print_include_names)) | |
c71f835b | 772 | _cpp_report_missing_guards (pfile); |
6de1e2a9 ZW |
773 | } |
774 | ||
f4ff5a69 | 775 | static void |
6cf87ca4 | 776 | post_options (cpp_reader *pfile) |
96302433 NB |
777 | { |
778 | /* -Wtraditional is not useful in C++ mode. */ | |
779 | if (CPP_OPTION (pfile, cplusplus)) | |
e3339d0f | 780 | CPP_OPTION (pfile, cpp_warn_traditional) = 0; |
96302433 | 781 | |
6d4587f7 | 782 | /* Permanently disable macro expansion if we are rescanning |
43612ffb | 783 | preprocessed text. Read preprocesed source in ISO mode. */ |
6d4587f7 | 784 | if (CPP_OPTION (pfile, preprocessed)) |
43612ffb | 785 | { |
ccfc4c91 OW |
786 | if (!CPP_OPTION (pfile, directives_only)) |
787 | pfile->state.prevent_expansion = 1; | |
43612ffb NB |
788 | CPP_OPTION (pfile, traditional) = 0; |
789 | } | |
790 | ||
a8eb6044 NB |
791 | if (CPP_OPTION (pfile, warn_trigraphs) == 2) |
792 | CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs); | |
793 | ||
43612ffb | 794 | if (CPP_OPTION (pfile, traditional)) |
26aea073 | 795 | { |
26aea073 NB |
796 | CPP_OPTION (pfile, trigraphs) = 0; |
797 | CPP_OPTION (pfile, warn_trigraphs) = 0; | |
798 | } | |
7ca3d2b1 | 799 | } |