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5538ada6 | 1 | /* CPP Library. |
99dee823 | 2 | Copyright (C) 1986-2021 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; |
1f69e63c | 97 | char size_t_literals; |
71d38ec8 | 98 | char elifdef; |
a01eb545 ZW |
99 | }; |
100 | ||
a01eb545 | 101 | static const struct lang_flags lang_defaults[] = |
71d38ec8 JM |
102 | { /* c99 c++ xnum xid c11 std digr ulit rlit udlit bincst digsep trig u8chlit vaopt scope dfp szlit elifdef */ |
103 | /* GNUC89 */ { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0 }, | |
104 | /* GNUC99 */ { 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0 }, | |
105 | /* GNUC11 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0 }, | |
106 | /* GNUC17 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0 }, | |
107 | /* GNUC2X */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1 }, | |
108 | /* STDC89 */ { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 }, | |
109 | /* STDC94 */ { 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 }, | |
110 | /* STDC99 */ { 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 }, | |
111 | /* STDC11 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 }, | |
112 | /* STDC17 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 }, | |
113 | /* STDC2X */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1 }, | |
114 | /* GNUCXX */ { 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0 }, | |
115 | /* CXX98 */ { 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0 }, | |
116 | /* GNUCXX11 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0 }, | |
117 | /* CXX11 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0 }, | |
118 | /* GNUCXX14 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0 }, | |
119 | /* CXX14 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0 }, | |
120 | /* GNUCXX17 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0 }, | |
121 | /* CXX17 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0 }, | |
122 | /* GNUCXX20 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0 }, | |
123 | /* CXX20 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0 }, | |
124 | /* GNUCXX23 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0 }, | |
125 | /* CXX23 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0 }, | |
126 | /* ASM */ { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } | |
a01eb545 ZW |
127 | }; |
128 | ||
5d8ebbd8 | 129 | /* Sets internal flags correctly for a given language. */ |
f749a36b | 130 | void |
6cf87ca4 | 131 | cpp_set_lang (cpp_reader *pfile, enum c_lang lang) |
dd07b884 | 132 | { |
a01eb545 | 133 | const struct lang_flags *l = &lang_defaults[(int) lang]; |
df383483 | 134 | |
bdb05a7b | 135 | CPP_OPTION (pfile, lang) = lang; |
dd07b884 | 136 | |
af15a2fe JM |
137 | CPP_OPTION (pfile, c99) = l->c99; |
138 | CPP_OPTION (pfile, cplusplus) = l->cplusplus; | |
139 | CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; | |
140 | CPP_OPTION (pfile, extended_identifiers) = l->extended_identifiers; | |
d3f4ff8b | 141 | CPP_OPTION (pfile, c11_identifiers) = l->c11_identifiers; |
af15a2fe | 142 | CPP_OPTION (pfile, std) = l->std; |
af15a2fe | 143 | CPP_OPTION (pfile, digraphs) = l->digraphs; |
b6baa67d | 144 | CPP_OPTION (pfile, uliterals) = l->uliterals; |
a48e3dd1 | 145 | CPP_OPTION (pfile, rliterals) = l->rliterals; |
3ce4f9e4 | 146 | CPP_OPTION (pfile, user_literals) = l->user_literals; |
01187df0 | 147 | CPP_OPTION (pfile, binary_constants) = l->binary_constants; |
7057e645 | 148 | CPP_OPTION (pfile, digit_separators) = l->digit_separators; |
e4276ba5 | 149 | CPP_OPTION (pfile, trigraphs) = l->trigraphs; |
fe95b036 | 150 | CPP_OPTION (pfile, utf8_char_literals) = l->utf8_char_literals; |
fb771b9d | 151 | CPP_OPTION (pfile, va_opt) = l->va_opt; |
93313b94 | 152 | CPP_OPTION (pfile, scope) = l->scope; |
175a85b2 | 153 | CPP_OPTION (pfile, dfp_constants) = l->dfp_constants; |
1f69e63c | 154 | CPP_OPTION (pfile, size_t_literals) = l->size_t_literals; |
71d38ec8 | 155 | CPP_OPTION (pfile, elifdef) = l->elifdef; |
dd07b884 NB |
156 | } |
157 | ||
c1bad961 | 158 | /* Initialize library global state. */ |
cf44ea52 | 159 | static void |
6cf87ca4 | 160 | init_library (void) |
cf44ea52 | 161 | { |
7ca3d2b1 NB |
162 | static int initialized = 0; |
163 | ||
164 | if (! initialized) | |
165 | { | |
166 | initialized = 1; | |
167 | ||
b0c084b7 JJ |
168 | _cpp_init_lexer (); |
169 | ||
7ca3d2b1 NB |
170 | /* Set up the trigraph map. This doesn't need to do anything if |
171 | we were compiled with a compiler that supports C99 designated | |
172 | initializers. */ | |
173 | init_trigraph_map (); | |
4f4e53dd PB |
174 | |
175 | #ifdef ENABLE_NLS | |
85eac2a0 | 176 | (void) bindtextdomain (PACKAGE, LOCALEDIR); |
4f4e53dd | 177 | #endif |
7ca3d2b1 | 178 | } |
cf44ea52 NB |
179 | } |
180 | ||
ec5c56db | 181 | /* Initialize a cpp_reader structure. */ |
cf44ea52 | 182 | cpp_reader * |
0823efed | 183 | cpp_create_reader (enum c_lang lang, cpp_hash_table *table, |
99b1c316 | 184 | class line_maps *line_table) |
6de1e2a9 | 185 | { |
7ca3d2b1 | 186 | cpp_reader *pfile; |
93c80368 | 187 | |
4912a07c | 188 | /* Initialize this instance of the library if it hasn't been already. */ |
674c3b40 | 189 | init_library (); |
7ca3d2b1 | 190 | |
c3f829c1 | 191 | pfile = XCNEW (cpp_reader); |
92582b75 | 192 | memset (&pfile->base_context, 0, sizeof (pfile->base_context)); |
93c80368 | 193 | |
f749a36b | 194 | cpp_set_lang (pfile, lang); |
a5a49440 | 195 | CPP_OPTION (pfile, warn_multichar) = 1; |
ae79697b | 196 | CPP_OPTION (pfile, discard_comments) = 1; |
477cdac7 | 197 | CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; |
1c6ffbab | 198 | CPP_OPTION (pfile, max_include_depth) = 200; |
be768055 | 199 | CPP_OPTION (pfile, operator_names) = 1; |
a8eb6044 | 200 | CPP_OPTION (pfile, warn_trigraphs) = 2; |
909de5da | 201 | CPP_OPTION (pfile, warn_endif_labels) = 1; |
2b71f4a4 | 202 | CPP_OPTION (pfile, cpp_warn_c90_c99_compat) = -1; |
175a85b2 | 203 | CPP_OPTION (pfile, cpp_warn_c11_c2x_compat) = -1; |
fe191308 | 204 | CPP_OPTION (pfile, cpp_warn_cxx11_compat) = 0; |
e3339d0f JM |
205 | CPP_OPTION (pfile, cpp_warn_deprecated) = 1; |
206 | CPP_OPTION (pfile, cpp_warn_long_long) = 0; | |
b1822ccc | 207 | CPP_OPTION (pfile, dollars_in_ident) = 1; |
78b8811a | 208 | CPP_OPTION (pfile, warn_dollars) = 1; |
e5b79219 | 209 | CPP_OPTION (pfile, warn_variadic_macros) = 1; |
c047ce93 | 210 | CPP_OPTION (pfile, warn_builtin_macro_redefined) = 1; |
70f6d5e1 | 211 | CPP_OPTION (pfile, cpp_warn_implicit_fallthrough) = 0; |
51fce2d3 DS |
212 | /* By default, track locations of tokens resulting from macro |
213 | expansion. The '2' means, track the locations with the highest | |
214 | accuracy. Read the comments for struct | |
215 | cpp_options::track_macro_expansion to learn about the other | |
216 | values. */ | |
217 | CPP_OPTION (pfile, track_macro_expansion) = 2; | |
50668cf6 | 218 | CPP_OPTION (pfile, warn_normalize) = normalized_C; |
7f5f5f98 | 219 | CPP_OPTION (pfile, warn_literal_suffix) = 1; |
5dc99c46 SB |
220 | CPP_OPTION (pfile, canonical_system_headers) |
221 | = ENABLE_CANONICAL_SYSTEM_HEADERS; | |
a4a0016d | 222 | CPP_OPTION (pfile, ext_numeric_literals) = 1; |
e8ff5196 | 223 | CPP_OPTION (pfile, warn_date_time) = 0; |
ae79697b | 224 | |
2443d4e1 NB |
225 | /* Default CPP arithmetic to something sensible for the host for the |
226 | benefit of dumb users like fix-header. */ | |
c9220e3a | 227 | CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); |
2443d4e1 NB |
228 | CPP_OPTION (pfile, char_precision) = CHAR_BIT; |
229 | CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); | |
230 | CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); | |
2a1dc0d8 | 231 | CPP_OPTION (pfile, unsigned_char) = 0; |
44a147ad | 232 | CPP_OPTION (pfile, unsigned_wchar) = 1; |
e6cc3a24 ZW |
233 | CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */ |
234 | ||
235 | /* Default to no charset conversion. */ | |
16dd5cfe | 236 | CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding (); |
e6cc3a24 | 237 | CPP_OPTION (pfile, wide_charset) = 0; |
4268e8bb | 238 | |
16dd5cfe EC |
239 | /* Default the input character set to UTF-8. */ |
240 | CPP_OPTION (pfile, input_charset) = _cpp_default_encoding (); | |
cf551fba | 241 | |
8f9b4009 NB |
242 | /* A fake empty "directory" used as the starting point for files |
243 | looked up without a search path. Name cannot be '/' because we | |
244 | don't want to prepend anything at all to filenames using it. All | |
245 | other entries are correct zero-initialized. */ | |
246 | pfile->no_search_path.name = (char *) ""; | |
247 | ||
500bee0a | 248 | /* Initialize the line map. */ |
50f59cd7 | 249 | pfile->line_table = line_table; |
d82fc108 | 250 | |
4a58aab6 | 251 | /* Initialize lexer state. */ |
93c80368 NB |
252 | pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
253 | ||
4ed5bcfb | 254 | /* Set up static tokens. */ |
4ed5bcfb NB |
255 | pfile->avoid_paste.type = CPP_PADDING; |
256 | pfile->avoid_paste.val.source = NULL; | |
5abe05b4 NS |
257 | pfile->avoid_paste.src_loc = 0; |
258 | pfile->endarg.type = CPP_EOF; | |
259 | pfile->endarg.flags = 0; | |
260 | pfile->endarg.src_loc = 0; | |
93c80368 | 261 | |
5fddcffc NB |
262 | /* Create a token buffer for the lexer. */ |
263 | _cpp_init_tokenrun (&pfile->base_run, 250); | |
264 | pfile->cur_run = &pfile->base_run; | |
265 | pfile->cur_token = pfile->base_run.base; | |
5fddcffc | 266 | |
4912a07c | 267 | /* Initialize the base context. */ |
93c80368 | 268 | pfile->context = &pfile->base_context; |
92582b75 | 269 | pfile->base_context.c.macro = 0; |
93c80368 NB |
270 | pfile->base_context.prev = pfile->base_context.next = 0; |
271 | ||
8c3b2693 NB |
272 | /* Aligned and unaligned storage. */ |
273 | pfile->a_buff = _cpp_get_buff (pfile, 0); | |
ece54d54 | 274 | pfile->u_buff = _cpp_get_buff (pfile, 0); |
93c80368 | 275 | |
17e7cb85 KT |
276 | /* Initialize table for push_macro/pop_macro. */ |
277 | pfile->pushed_macros = 0; | |
278 | ||
e3dfef44 | 279 | /* Do not force token locations by default. */ |
f3f6029d | 280 | pfile->forced_token_location = 0; |
e3dfef44 | 281 | |
4b5f564a NS |
282 | /* Note the timestamp is unset. */ |
283 | pfile->time_stamp = time_t (-1); | |
284 | pfile->time_stamp_kind = 0; | |
15c98b2e | 285 | |
87ed109f NB |
286 | /* The expression parser stack. */ |
287 | _cpp_expand_op_stack (pfile); | |
288 | ||
4912a07c | 289 | /* Initialize the buffer obstack. */ |
19a9ba64 | 290 | obstack_specify_allocation (&pfile->buffer_ob, 0, 0, xmalloc, free); |
2a967f3d | 291 | |
8f9b4009 | 292 | _cpp_init_files (pfile); |
cf44ea52 | 293 | |
b4e46cea PB |
294 | _cpp_init_hashtable (pfile, table); |
295 | ||
cf44ea52 | 296 | return pfile; |
f2d5f0cc ZW |
297 | } |
298 | ||
5ffeb913 TT |
299 | /* Set the line_table entry in PFILE. This is called after reading a |
300 | PCH file, as the old line_table will be incorrect. */ | |
301 | void | |
99b1c316 | 302 | cpp_set_line_map (cpp_reader *pfile, class line_maps *line_table) |
5ffeb913 TT |
303 | { |
304 | pfile->line_table = line_table; | |
305 | } | |
306 | ||
400023a3 | 307 | /* Free resources used by PFILE. Accessing PFILE after this function |
8d9afc4e | 308 | returns leads to undefined behavior. Returns the error count. */ |
76c3e73e | 309 | void |
6cf87ca4 | 310 | cpp_destroy (cpp_reader *pfile) |
6de1e2a9 | 311 | { |
93c80368 | 312 | cpp_context *context, *contextn; |
17e7cb85 | 313 | struct def_pragma_macro *pmacro; |
50410426 | 314 | tokenrun *run, *runn; |
631d0d36 | 315 | int i; |
709e9e50 | 316 | |
87ed109f | 317 | free (pfile->op_stack); |
af0d16cd | 318 | |
38b24ee2 | 319 | while (CPP_BUFFER (pfile) != NULL) |
ef6e958a | 320 | _cpp_pop_buffer (pfile); |
6de1e2a9 | 321 | |
04695783 | 322 | free (pfile->out.base); |
004cb263 | 323 | |
93c80368 | 324 | if (pfile->macro_buffer) |
4b49c365 | 325 | { |
fad205ff | 326 | free (pfile->macro_buffer); |
4b49c365 AO |
327 | pfile->macro_buffer = NULL; |
328 | pfile->macro_buffer_len = 0; | |
329 | } | |
93c80368 | 330 | |
f4ff5a69 NB |
331 | if (pfile->deps) |
332 | deps_free (pfile->deps); | |
2a967f3d | 333 | obstack_free (&pfile->buffer_ob, 0); |
49e6c08e | 334 | |
2a967f3d | 335 | _cpp_destroy_hashtable (pfile); |
8f9b4009 | 336 | _cpp_cleanup_files (pfile); |
e6cc3a24 | 337 | _cpp_destroy_iconv (pfile); |
709e9e50 | 338 | |
8c3b2693 | 339 | _cpp_free_buff (pfile->a_buff); |
ece54d54 | 340 | _cpp_free_buff (pfile->u_buff); |
b8af0ca5 | 341 | _cpp_free_buff (pfile->free_buffs); |
93c80368 | 342 | |
50410426 NB |
343 | for (run = &pfile->base_run; run; run = runn) |
344 | { | |
345 | runn = run->next; | |
346 | free (run->base); | |
347 | if (run != &pfile->base_run) | |
348 | free (run); | |
349 | } | |
350 | ||
93c80368 NB |
351 | for (context = pfile->base_context.next; context; context = contextn) |
352 | { | |
353 | contextn = context->next; | |
354 | free (context); | |
355 | } | |
400023a3 | 356 | |
631d0d36 MG |
357 | if (pfile->comments.entries) |
358 | { | |
359 | for (i = 0; i < pfile->comments.count; i++) | |
360 | free (pfile->comments.entries[i].comment); | |
361 | ||
362 | free (pfile->comments.entries); | |
363 | } | |
17e7cb85 KT |
364 | if (pfile->pushed_macros) |
365 | { | |
366 | do | |
367 | { | |
368 | pmacro = pfile->pushed_macros; | |
369 | pfile->pushed_macros = pmacro->next; | |
370 | free (pmacro->name); | |
371 | free (pmacro); | |
372 | } | |
373 | while (pfile->pushed_macros); | |
374 | } | |
631d0d36 | 375 | |
400023a3 | 376 | free (pfile); |
6de1e2a9 ZW |
377 | } |
378 | ||
93c80368 | 379 | /* This structure defines one built-in identifier. A node will be |
f24a153a ZW |
380 | entered in the hash table under the name NAME, with value VALUE. |
381 | ||
382 | There are two tables of these. builtin_array holds all the | |
383 | "builtin" macros: these are handled by builtin_macro() in | |
a2566ae9 | 384 | macro.c. Builtin is somewhat of a misnomer -- the property of |
f24a153a | 385 | interest is that these macros require special code to compute their |
128465e6 | 386 | expansions. The value is a "cpp_builtin_type" enumerator. |
f24a153a ZW |
387 | |
388 | operator_array holds the C++ named operators. These are keywords | |
389 | which act as aliases for punctuators. In C++, they cannot be | |
390 | altered through #define, and #if recognizes them as operators. In | |
391 | C, these are not entered into the hash table at all (but see | |
392 | <iso646.h>). The value is a token-type enumerator. */ | |
c047ce93 | 393 | struct builtin_macro |
a9ae4483 | 394 | { |
c047ce93 SB |
395 | const uchar *const name; |
396 | const unsigned short len; | |
397 | const unsigned short value; | |
398 | const bool always_warn_if_redefined; | |
a9ae4483 | 399 | }; |
93c80368 | 400 | |
c047ce93 SB |
401 | #define B(n, t, f) { DSC(n), t, f } |
402 | static const struct builtin_macro builtin_array[] = | |
6de1e2a9 | 403 | { |
c047ce93 SB |
404 | B("__TIMESTAMP__", BT_TIMESTAMP, false), |
405 | B("__TIME__", BT_TIME, false), | |
406 | B("__DATE__", BT_DATE, false), | |
407 | B("__FILE__", BT_FILE, false), | |
1a9b3f04 | 408 | B("__FILE_NAME__", BT_FILE_NAME, false), |
c047ce93 SB |
409 | B("__BASE_FILE__", BT_BASE_FILE, false), |
410 | B("__LINE__", BT_SPECLINE, true), | |
411 | B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL, true), | |
412 | B("__COUNTER__", BT_COUNTER, true), | |
f6fe3bbf TM |
413 | /* Make sure to update the list of built-in |
414 | function-like macros in traditional.c: | |
415 | fun_like_macro() when adding more following */ | |
1f8d3e84 | 416 | B("__has_attribute", BT_HAS_ATTRIBUTE, true), |
1d00f8c8 | 417 | B("__has_c_attribute", BT_HAS_STD_ATTRIBUTE, true), |
1f8d3e84 | 418 | B("__has_cpp_attribute", BT_HAS_ATTRIBUTE, true), |
ad1539d5 | 419 | B("__has_builtin", BT_HAS_BUILTIN, true), |
3d056cbf NS |
420 | B("__has_include", BT_HAS_INCLUDE, true), |
421 | B("__has_include_next",BT_HAS_INCLUDE_NEXT, true), | |
278c4662 NB |
422 | /* Keep builtins not used for -traditional-cpp at the end, and |
423 | update init_builtins() if any more are added. */ | |
c047ce93 SB |
424 | B("_Pragma", BT_PRAGMA, true), |
425 | B("__STDC__", BT_STDC, true), | |
426 | }; | |
427 | #undef B | |
428 | ||
429 | struct builtin_operator | |
430 | { | |
431 | const uchar *const name; | |
432 | const unsigned short len; | |
433 | const unsigned short value; | |
f24a153a | 434 | }; |
92936ecf | 435 | |
c047ce93 SB |
436 | #define B(n, t) { DSC(n), t } |
437 | static const struct builtin_operator operator_array[] = | |
f24a153a ZW |
438 | { |
439 | B("and", CPP_AND_AND), | |
440 | B("and_eq", CPP_AND_EQ), | |
441 | B("bitand", CPP_AND), | |
442 | B("bitor", CPP_OR), | |
443 | B("compl", CPP_COMPL), | |
444 | B("not", CPP_NOT), | |
445 | B("not_eq", CPP_NOT_EQ), | |
446 | B("or", CPP_OR_OR), | |
447 | B("or_eq", CPP_OR_EQ), | |
448 | B("xor", CPP_XOR), | |
449 | B("xor_eq", CPP_XOR_EQ) | |
a9ae4483 | 450 | }; |
12cf91fe | 451 | #undef B |
a9ae4483 | 452 | |
17645b15 NB |
453 | /* Mark the C++ named operators in the hash table. */ |
454 | static void | |
3d8b2a98 | 455 | mark_named_operators (cpp_reader *pfile, int flags) |
17645b15 | 456 | { |
c047ce93 | 457 | const struct builtin_operator *b; |
17645b15 NB |
458 | |
459 | for (b = operator_array; | |
460 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
461 | b++) | |
462 | { | |
463 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
3d8b2a98 | 464 | hp->flags |= flags; |
4977bab6 ZW |
465 | hp->is_directive = 0; |
466 | hp->directive_index = b->value; | |
17645b15 NB |
467 | } |
468 | } | |
469 | ||
cfc93532 MLI |
470 | /* Helper function of cpp_type2name. Return the string associated with |
471 | named operator TYPE. */ | |
472 | const char * | |
473 | cpp_named_operator2name (enum cpp_ttype type) | |
474 | { | |
475 | const struct builtin_operator *b; | |
476 | ||
477 | for (b = operator_array; | |
478 | b < (operator_array + ARRAY_SIZE (operator_array)); | |
479 | b++) | |
480 | { | |
481 | if (type == b->value) | |
482 | return (const char *) b->name; | |
483 | } | |
484 | ||
485 | return NULL; | |
486 | } | |
487 | ||
c1bad961 | 488 | void |
ccfc4c91 | 489 | cpp_init_special_builtins (cpp_reader *pfile) |
a9ae4483 | 490 | { |
c047ce93 | 491 | const struct builtin_macro *b; |
278c4662 | 492 | size_t n = ARRAY_SIZE (builtin_array); |
771c4df3 | 493 | |
278c4662 NB |
494 | if (CPP_OPTION (pfile, traditional)) |
495 | n -= 2; | |
83900997 JJ |
496 | else if (! CPP_OPTION (pfile, stdc_0_in_system_headers) |
497 | || CPP_OPTION (pfile, std)) | |
ccfc4c91 | 498 | n--; |
278c4662 | 499 | |
83900997 | 500 | for (b = builtin_array; b < builtin_array + n; b++) |
6de1e2a9 | 501 | { |
ad1539d5 | 502 | if ((b->value == BT_HAS_ATTRIBUTE |
1d00f8c8 | 503 | || b->value == BT_HAS_STD_ATTRIBUTE |
ad1539d5 | 504 | || b->value == BT_HAS_BUILTIN) |
1f8d3e84 JJ |
505 | && (CPP_OPTION (pfile, lang) == CLK_ASM |
506 | || pfile->cb.has_attribute == NULL)) | |
507 | continue; | |
f24a153a | 508 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
a570d97f | 509 | hp->type = NT_BUILTIN_MACRO; |
b753b37b | 510 | if (b->always_warn_if_redefined) |
c047ce93 | 511 | hp->flags |= NODE_WARN; |
7e5487a2 | 512 | hp->value.builtin = (enum cpp_builtin_type) b->value; |
6de1e2a9 | 513 | } |
ccfc4c91 OW |
514 | } |
515 | ||
aa23e73b JJ |
516 | /* Restore macro C to builtin macro definition. */ |
517 | ||
518 | void | |
519 | _cpp_restore_special_builtin (cpp_reader *pfile, struct def_pragma_macro *c) | |
520 | { | |
521 | size_t len = strlen (c->name); | |
522 | ||
523 | for (const struct builtin_macro *b = builtin_array; | |
524 | b < builtin_array + ARRAY_SIZE (builtin_array); b++) | |
525 | if (b->len == len && memcmp (c->name, b->name, len + 1) == 0) | |
526 | { | |
527 | cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
528 | hp->type = NT_BUILTIN_MACRO; | |
529 | if (b->always_warn_if_redefined) | |
530 | hp->flags |= NODE_WARN; | |
531 | hp->value.builtin = (enum cpp_builtin_type) b->value; | |
532 | } | |
533 | } | |
534 | ||
ccfc4c91 OW |
535 | /* Read the builtins table above and enter them, and language-specific |
536 | macros, into the hash table. HOSTED is true if this is a hosted | |
537 | environment. */ | |
538 | void | |
539 | cpp_init_builtins (cpp_reader *pfile, int hosted) | |
540 | { | |
541 | cpp_init_special_builtins (pfile); | |
542 | ||
543 | if (!CPP_OPTION (pfile, traditional) | |
544 | && (! CPP_OPTION (pfile, stdc_0_in_system_headers) | |
545 | || CPP_OPTION (pfile, std))) | |
546 | _cpp_define_builtin (pfile, "__STDC__ 1"); | |
c740cee2 NB |
547 | |
548 | if (CPP_OPTION (pfile, cplusplus)) | |
1fb80b0c | 549 | { |
78739c2d PF |
550 | /* C++23 is not yet a standard. For now, use an invalid |
551 | * year/month, 202100L, which is larger than 202002L. */ | |
552 | if (CPP_OPTION (pfile, lang) == CLK_CXX23 | |
553 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX23) | |
554 | _cpp_define_builtin (pfile, "__cplusplus 202100L"); | |
555 | else if (CPP_OPTION (pfile, lang) == CLK_CXX20 | |
b04445d4 | 556 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX20) |
445430e1 | 557 | _cpp_define_builtin (pfile, "__cplusplus 202002L"); |
026a79f7 | 558 | else if (CPP_OPTION (pfile, lang) == CLK_CXX17 |
7b936140 | 559 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX17) |
85e653c9 | 560 | _cpp_define_builtin (pfile, "__cplusplus 201703L"); |
e4276ba5 ESR |
561 | else if (CPP_OPTION (pfile, lang) == CLK_CXX14 |
562 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX14) | |
563 | _cpp_define_builtin (pfile, "__cplusplus 201402L"); | |
61949153 PC |
564 | else if (CPP_OPTION (pfile, lang) == CLK_CXX11 |
565 | || CPP_OPTION (pfile, lang) == CLK_GNUCXX11) | |
1fb80b0c JM |
566 | _cpp_define_builtin (pfile, "__cplusplus 201103L"); |
567 | else | |
568 | _cpp_define_builtin (pfile, "__cplusplus 199711L"); | |
569 | } | |
2a1dc0d8 ZW |
570 | else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
571 | _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); | |
0f7866e7 | 572 | else if (CPP_OPTION (pfile, lang) == CLK_STDC94) |
c740cee2 | 573 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); |
9f936c86 JM |
574 | else if (CPP_OPTION (pfile, lang) == CLK_STDC2X |
575 | || CPP_OPTION (pfile, lang) == CLK_GNUC2X) | |
576 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 202000L"); | |
c76dc9c3 JM |
577 | else if (CPP_OPTION (pfile, lang) == CLK_STDC17 |
578 | || CPP_OPTION (pfile, lang) == CLK_GNUC17) | |
579 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 201710L"); | |
48b0b196 JM |
580 | else if (CPP_OPTION (pfile, lang) == CLK_STDC11 |
581 | || CPP_OPTION (pfile, lang) == CLK_GNUC11) | |
582 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 201112L"); | |
c740cee2 NB |
583 | else if (CPP_OPTION (pfile, c99)) |
584 | _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); | |
585 | ||
a48e3dd1 | 586 | if (CPP_OPTION (pfile, uliterals) |
e4276ba5 ESR |
587 | && !(CPP_OPTION (pfile, cplusplus) |
588 | && (CPP_OPTION (pfile, lang) == CLK_GNUCXX | |
589 | || CPP_OPTION (pfile, lang) == CLK_CXX98))) | |
a48e3dd1 JM |
590 | { |
591 | _cpp_define_builtin (pfile, "__STDC_UTF_16__ 1"); | |
592 | _cpp_define_builtin (pfile, "__STDC_UTF_32__ 1"); | |
593 | } | |
594 | ||
6e270179 | 595 | if (hosted) |
58b5b894 | 596 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1"); |
6e270179 | 597 | else |
58b5b894 | 598 | _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0"); |
6e270179 | 599 | |
0f7866e7 ZL |
600 | if (CPP_OPTION (pfile, objc)) |
601 | _cpp_define_builtin (pfile, "__OBJC__ 1"); | |
4a58aab6 NB |
602 | } |
603 | ||
2443d4e1 | 604 | /* Sanity-checks are dependent on command-line options, so it is |
174f6622 | 605 | called as a subroutine of cpp_read_main_file. */ |
22d66382 | 606 | #if CHECKING_P |
6cf87ca4 ZW |
607 | static void sanity_checks (cpp_reader *); |
608 | static void sanity_checks (cpp_reader *pfile) | |
2443d4e1 NB |
609 | { |
610 | cppchar_t test = 0; | |
c9220e3a | 611 | size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); |
2443d4e1 NB |
612 | |
613 | /* Sanity checks for assumptions about CPP arithmetic and target | |
614 | type precisions made by cpplib. */ | |
615 | test--; | |
616 | if (test < 1) | |
0527bc4e | 617 | cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type"); |
2443d4e1 | 618 | |
c9220e3a | 619 | if (CPP_OPTION (pfile, precision) > max_precision) |
0527bc4e | 620 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
621 | "preprocessor arithmetic has maximum precision of %lu bits;" |
622 | " target requires %lu bits", | |
c9220e3a NB |
623 | (unsigned long) max_precision, |
624 | (unsigned long) CPP_OPTION (pfile, precision)); | |
2443d4e1 NB |
625 | |
626 | if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) | |
0527bc4e | 627 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
628 | "CPP arithmetic must be at least as precise as a target int"); |
629 | ||
630 | if (CPP_OPTION (pfile, char_precision) < 8) | |
0527bc4e | 631 | cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide"); |
2443d4e1 NB |
632 | |
633 | if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 634 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
635 | "target wchar_t is narrower than target char"); |
636 | ||
637 | if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) | |
0527bc4e | 638 | cpp_error (pfile, CPP_DL_ICE, |
2443d4e1 NB |
639 | "target int is narrower than target char"); |
640 | ||
c9220e3a NB |
641 | /* This is assumed in eval_token() and could be fixed if necessary. */ |
642 | if (sizeof (cppchar_t) > sizeof (cpp_num_part)) | |
0527bc4e JDA |
643 | cpp_error (pfile, CPP_DL_ICE, |
644 | "CPP half-integer narrower than CPP character"); | |
c9220e3a | 645 | |
2443d4e1 | 646 | if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) |
0527bc4e | 647 | cpp_error (pfile, CPP_DL_ICE, |
6cf87ca4 ZW |
648 | "CPP on this host cannot handle wide character constants over" |
649 | " %lu bits, but the target requires %lu bits", | |
c9220e3a NB |
650 | (unsigned long) BITS_PER_CPPCHAR_T, |
651 | (unsigned long) CPP_OPTION (pfile, wchar_precision)); | |
2443d4e1 NB |
652 | } |
653 | #else | |
654 | # define sanity_checks(PFILE) | |
655 | #endif | |
656 | ||
f5e99456 | 657 | /* This is called after options have been parsed, and partially |
59e4e217 | 658 | processed. */ |
4169c321 PB |
659 | void |
660 | cpp_post_options (cpp_reader *pfile) | |
6de1e2a9 | 661 | { |
3d8b2a98 ILT |
662 | int flags; |
663 | ||
2443d4e1 NB |
664 | sanity_checks (pfile); |
665 | ||
f4ff5a69 NB |
666 | post_options (pfile); |
667 | ||
c19b12cb | 668 | /* Mark named operators before handling command line macros. */ |
3d8b2a98 | 669 | flags = 0; |
c19b12cb | 670 | if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) |
3d8b2a98 ILT |
671 | flags |= NODE_OPERATOR; |
672 | if (CPP_OPTION (pfile, warn_cxx_operator_names)) | |
673 | flags |= NODE_DIAGNOSTIC | NODE_WARN_OPERATOR; | |
674 | if (flags != 0) | |
675 | mark_named_operators (pfile, flags); | |
4169c321 | 676 | } |
c19b12cb | 677 | |
4dc299fb | 678 | /* Setup for processing input from the file named FNAME, or stdin if |
6bf2ff0d NS |
679 | it is the empty string. Return the original filename on success |
680 | (e.g. foo.i->foo.c), or NULL on failure. INJECTING is true if | |
681 | there may be injected headers before line 1 of the main file. */ | |
8e9ea4d7 | 682 | const char * |
6bf2ff0d | 683 | cpp_read_main_file (cpp_reader *pfile, const char *fname, bool injecting) |
4169c321 | 684 | { |
918e8b10 NS |
685 | if (mkdeps *deps = cpp_get_deps (pfile)) |
686 | /* Set the default target (if there is none already). */ | |
d8909271 | 687 | deps_add_default_target (deps, fname); |
96302433 | 688 | |
4dc299fb | 689 | pfile->main_file |
9844497a NS |
690 | = _cpp_find_file (pfile, fname, |
691 | CPP_OPTION (pfile, preprocessed) ? &pfile->no_search_path | |
692 | : CPP_OPTION (pfile, main_search) == CMS_user | |
693 | ? pfile->quote_include | |
694 | : CPP_OPTION (pfile, main_search) == CMS_system | |
695 | ? pfile->bracket_include : &pfile->no_search_path, | |
696 | /*angle=*/0, _cpp_FFK_NORMAL, 0); | |
697 | ||
4dc299fb | 698 | if (_cpp_find_failed (pfile->main_file)) |
3092d0fc | 699 | return NULL; |
f5e99456 | 700 | |
6bf2ff0d | 701 | _cpp_stack_file (pfile, pfile->main_file, |
d1c566d7 NS |
702 | injecting || CPP_OPTION (pfile, preprocessed) |
703 | ? IT_PRE_MAIN : IT_MAIN, 0); | |
4dc299fb PB |
704 | |
705 | /* For foo.i, read the original filename foo.c now, for the benefit | |
706 | of the front ends. */ | |
707 | if (CPP_OPTION (pfile, preprocessed)) | |
d1c566d7 NS |
708 | if (!read_original_filename (pfile)) |
709 | { | |
710 | /* We're on line 1 after all. */ | |
711 | auto *last = linemap_check_ordinary | |
712 | (LINEMAPS_LAST_MAP (pfile->line_table, false)); | |
713 | last->to_line = 1; | |
714 | /* Inform of as-if a file change. */ | |
715 | _cpp_do_file_change (pfile, LC_RENAME_VERBATIM, LINEMAP_FILE (last), | |
716 | LINEMAP_LINE (last), LINEMAP_SYSP (last)); | |
717 | } | |
134051f1 | 718 | |
9844497a NS |
719 | auto *map = LINEMAPS_LAST_ORDINARY_MAP (pfile->line_table); |
720 | pfile->main_loc = MAP_START_LOCATION (map); | |
721 | ||
722 | return ORDINARY_MAP_FILE_NAME (map); | |
723 | } | |
724 | ||
725 | location_t | |
726 | cpp_main_loc (const cpp_reader *pfile) | |
727 | { | |
728 | return pfile->main_loc; | |
f5e99456 NB |
729 | } |
730 | ||
d1c566d7 NS |
731 | /* For preprocessed files, if the very first characters are |
732 | '#<SPACE>[01]<SPACE>', then handle a line directive so we know the | |
733 | original file name. This will generate file_change callbacks, | |
734 | which the front ends must handle appropriately given their state of | |
735 | initialization. We peek directly into the character buffer, so | |
736 | that we're not confused by otherwise-skipped white space & | |
737 | comments. We can be very picky, because this should have been | |
738 | machine-generated text (by us, no less). This way we do not | |
739 | interfere with the module directive state machine. */ | |
740 | ||
741 | static bool | |
6cf87ca4 | 742 | read_original_filename (cpp_reader *pfile) |
f5e99456 | 743 | { |
d1c566d7 NS |
744 | auto *buf = pfile->buffer->next_line; |
745 | ||
746 | if (pfile->buffer->rlimit - buf > 4 | |
747 | && buf[0] == '#' | |
748 | && buf[1] == ' ' | |
749 | // Also permit '1', as that's what used to be here | |
750 | && (buf[2] == '0' || buf[2] == '1') | |
751 | && buf[3] == ' ') | |
f5e99456 | 752 | { |
d1c566d7 NS |
753 | const cpp_token *token = _cpp_lex_direct (pfile); |
754 | gcc_checking_assert (token->type == CPP_HASH); | |
755 | if (_cpp_handle_directive (pfile, token->flags & PREV_WHITE)) | |
f5e99456 | 756 | { |
b20d9f0c | 757 | read_original_directory (pfile); |
a13be187 NS |
758 | |
759 | auto *penult = &linemap_check_ordinary | |
760 | (LINEMAPS_LAST_MAP (pfile->line_table, false))[-1]; | |
761 | if (penult[1].reason == LC_RENAME_VERBATIM) | |
762 | { | |
763 | /* Expunge any evidence of the original linemap. */ | |
764 | pfile->line_table->highest_location | |
765 | = pfile->line_table->highest_line | |
766 | = penult[0].start_location; | |
767 | ||
768 | penult[1].start_location = penult[0].start_location; | |
769 | penult[1].reason = penult[0].reason; | |
770 | penult[0] = penult[1]; | |
771 | pfile->line_table->info_ordinary.used--; | |
772 | pfile->line_table->info_ordinary.cache = 0; | |
773 | } | |
774 | ||
d1c566d7 | 775 | return true; |
f5e99456 NB |
776 | } |
777 | } | |
778 | ||
d1c566d7 | 779 | return false; |
f5e99456 NB |
780 | } |
781 | ||
b20d9f0c AO |
782 | /* For preprocessed files, if the tokens following the first filename |
783 | line is of the form # <line> "/path/name//", handle the | |
d1c566d7 NS |
784 | directive so we know the original current directory. |
785 | ||
786 | As with the first line peeking, we can do this without lexing by | |
787 | being picky. */ | |
b20d9f0c AO |
788 | static void |
789 | read_original_directory (cpp_reader *pfile) | |
790 | { | |
d1c566d7 NS |
791 | auto *buf = pfile->buffer->next_line; |
792 | ||
793 | if (pfile->buffer->rlimit - buf > 4 | |
794 | && buf[0] == '#' | |
795 | && buf[1] == ' ' | |
796 | // Also permit '1', as that's what used to be here | |
797 | && (buf[2] == '0' || buf[2] == '1') | |
798 | && buf[3] == ' ') | |
b20d9f0c | 799 | { |
d1c566d7 NS |
800 | const cpp_token *hash = _cpp_lex_direct (pfile); |
801 | gcc_checking_assert (hash->type == CPP_HASH); | |
802 | pfile->state.in_directive = 1; | |
803 | const cpp_token *number = _cpp_lex_direct (pfile); | |
804 | gcc_checking_assert (number->type == CPP_NUMBER); | |
805 | const cpp_token *string = _cpp_lex_direct (pfile); | |
806 | pfile->state.in_directive = 0; | |
b20d9f0c | 807 | |
d1c566d7 NS |
808 | const unsigned char *text = nullptr; |
809 | size_t len = 0; | |
810 | if (string->type == CPP_STRING) | |
811 | { | |
812 | /* The string value includes the quotes. */ | |
813 | text = string->val.str.text; | |
814 | len = string->val.str.len; | |
815 | } | |
816 | if (len < 5 | |
817 | || !IS_DIR_SEPARATOR (text[len - 2]) | |
818 | || !IS_DIR_SEPARATOR (text[len - 3])) | |
819 | { | |
820 | /* That didn't work out, back out. */ | |
821 | _cpp_backup_tokens (pfile, 3); | |
822 | return; | |
823 | } | |
b20d9f0c | 824 | |
d1c566d7 NS |
825 | if (pfile->cb.dir_change) |
826 | { | |
827 | /* Smash the string directly, it's dead at this point */ | |
828 | char *smashy = (char *)text; | |
829 | smashy[len - 3] = 0; | |
830 | ||
831 | pfile->cb.dir_change (pfile, smashy + 1); | |
832 | } | |
b20d9f0c | 833 | |
d1c566d7 | 834 | /* We should be at EOL. */ |
b20d9f0c | 835 | } |
b20d9f0c AO |
836 | } |
837 | ||
76c3e73e | 838 | /* This is called at the end of preprocessing. It pops the last |
148e4216 | 839 | buffer and writes dependency output. |
16dd5cfe | 840 | |
76c3e73e NB |
841 | Maybe it should also reset state, such that you could call |
842 | cpp_start_read with a new filename to restart processing. */ | |
148e4216 | 843 | void |
6cf87ca4 | 844 | cpp_finish (cpp_reader *pfile, FILE *deps_stream) |
6de1e2a9 | 845 | { |
a69cbaac NB |
846 | /* Warn about unused macros before popping the final buffer. */ |
847 | if (CPP_OPTION (pfile, warn_unused_macros)) | |
848 | cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); | |
849 | ||
a2566ae9 | 850 | /* lex.c leaves the final buffer on the stack. This it so that |
7364fdd8 | 851 | it returns an unending stream of CPP_EOFs to the client. If we |
a1f300c0 | 852 | popped the buffer, we'd dereference a NULL buffer pointer and |
7364fdd8 NB |
853 | segfault. It's nice to allow the client to do worry-free excess |
854 | cpp_get_token calls. */ | |
855 | while (pfile->buffer) | |
856 | _cpp_pop_buffer (pfile); | |
c1212d2f | 857 | |
918e8b10 NS |
858 | if (deps_stream) |
859 | deps_write (pfile, deps_stream, 72); | |
3caee4a8 | 860 | |
d4506961 ZW |
861 | /* Report on headers that could use multiple include guards. */ |
862 | if (CPP_OPTION (pfile, print_include_names)) | |
c71f835b | 863 | _cpp_report_missing_guards (pfile); |
6de1e2a9 ZW |
864 | } |
865 | ||
f4ff5a69 | 866 | static void |
6cf87ca4 | 867 | post_options (cpp_reader *pfile) |
96302433 NB |
868 | { |
869 | /* -Wtraditional is not useful in C++ mode. */ | |
870 | if (CPP_OPTION (pfile, cplusplus)) | |
e3339d0f | 871 | CPP_OPTION (pfile, cpp_warn_traditional) = 0; |
96302433 | 872 | |
6d4587f7 | 873 | /* Permanently disable macro expansion if we are rescanning |
43612ffb | 874 | preprocessed text. Read preprocesed source in ISO mode. */ |
6d4587f7 | 875 | if (CPP_OPTION (pfile, preprocessed)) |
43612ffb | 876 | { |
ccfc4c91 OW |
877 | if (!CPP_OPTION (pfile, directives_only)) |
878 | pfile->state.prevent_expansion = 1; | |
43612ffb NB |
879 | CPP_OPTION (pfile, traditional) = 0; |
880 | } | |
881 | ||
a8eb6044 NB |
882 | if (CPP_OPTION (pfile, warn_trigraphs) == 2) |
883 | CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs); | |
884 | ||
43612ffb | 885 | if (CPP_OPTION (pfile, traditional)) |
26aea073 | 886 | { |
26aea073 NB |
887 | CPP_OPTION (pfile, trigraphs) = 0; |
888 | CPP_OPTION (pfile, warn_trigraphs) = 0; | |
889 | } | |
c9c3d5f2 NS |
890 | |
891 | if (CPP_OPTION (pfile, module_directives)) | |
892 | { | |
893 | /* These unspellable tokens have a leading space. */ | |
894 | const char *const inits[spec_nodes::M_HWM] | |
895 | = {"export ", "module ", "import ", "__import"}; | |
896 | ||
897 | for (int ix = 0; ix != spec_nodes::M_HWM; ix++) | |
898 | { | |
899 | cpp_hashnode *node = cpp_lookup (pfile, UC (inits[ix]), | |
900 | strlen (inits[ix])); | |
901 | ||
902 | /* Token we pass to the compiler. */ | |
903 | pfile->spec_nodes.n_modules[ix][1] = node; | |
904 | ||
905 | if (ix != spec_nodes::M__IMPORT) | |
906 | /* Token we recognize when lexing, drop the trailing ' '. */ | |
907 | node = cpp_lookup (pfile, NODE_NAME (node), NODE_LEN (node) - 1); | |
908 | ||
909 | node->flags |= NODE_MODULE; | |
910 | pfile->spec_nodes.n_modules[ix][0] = node; | |
911 | } | |
912 | } | |
7ca3d2b1 | 913 | } |