Mercurial > hg > CbC > CbC_gcc
annotate libcpp/init.c @ 145:1830386684a0
gcc-9.2.0
| author | anatofuz |
|---|---|
| date | Thu, 13 Feb 2020 11:34:05 +0900 |
| parents | 84e7813d76e9 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* CPP Library. |
| 145 | 2 Copyright (C) 1986-2020 Free Software Foundation, Inc. |
| 0 | 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 | |
| 9 Free Software Foundation; either version 3, or (at your option) any | |
| 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 | |
| 18 along with this program; see the file COPYING3. If not see | |
| 19 <http://www.gnu.org/licenses/>. */ | |
| 20 | |
| 21 #include "config.h" | |
| 22 #include "system.h" | |
| 23 #include "cpplib.h" | |
| 24 #include "internal.h" | |
| 25 #include "mkdeps.h" | |
| 26 #include "localedir.h" | |
| 111 | 27 #include "filenames.h" |
| 28 | |
| 29 #ifndef ENABLE_CANONICAL_SYSTEM_HEADERS | |
| 30 #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
| 31 #define ENABLE_CANONICAL_SYSTEM_HEADERS 1 | |
| 32 #else | |
| 33 #define ENABLE_CANONICAL_SYSTEM_HEADERS 0 | |
| 34 #endif | |
| 35 #endif | |
| 0 | 36 |
| 37 static void init_library (void); | |
|
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38 static void mark_named_operators (cpp_reader *, int); |
| 0 | 39 static void read_original_filename (cpp_reader *); |
| 40 static void read_original_directory (cpp_reader *); | |
| 41 static void post_options (cpp_reader *); | |
| 42 | |
| 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 | |
| 45 runtime. */ | |
| 46 #if HAVE_DESIGNATED_INITIALIZERS | |
| 47 | |
| 48 #define init_trigraph_map() /* Nothing. */ | |
| 49 #define TRIGRAPH_MAP \ | |
| 50 __extension__ const uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { | |
| 51 | |
| 52 #define END }; | |
| 53 #define s(p, v) [p] = v, | |
| 54 | |
| 55 #else | |
| 56 | |
| 57 #define TRIGRAPH_MAP uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \ | |
| 58 static void init_trigraph_map (void) { \ | |
| 59 unsigned char *x = _cpp_trigraph_map; | |
| 60 | |
| 61 #define END } | |
| 62 #define s(p, v) x[p] = v; | |
| 63 | |
| 64 #endif | |
| 65 | |
| 66 TRIGRAPH_MAP | |
| 67 s('=', '#') s(')', ']') s('!', '|') | |
| 68 s('(', '[') s('\'', '^') s('>', '}') | |
| 69 s('/', '\\') s('<', '{') s('-', '~') | |
| 70 END | |
| 71 | |
| 72 #undef s | |
| 73 #undef END | |
| 74 #undef TRIGRAPH_MAP | |
| 75 | |
| 76 /* A set of booleans indicating what CPP features each source language | |
| 77 requires. */ | |
| 78 struct lang_flags | |
| 79 { | |
| 80 char c99; | |
| 81 char cplusplus; | |
| 82 char extended_numbers; | |
| 83 char extended_identifiers; | |
| 111 | 84 char c11_identifiers; |
| 0 | 85 char std; |
| 86 char digraphs; | |
| 87 char uliterals; | |
| 111 | 88 char rliterals; |
| 89 char user_literals; | |
| 90 char binary_constants; | |
| 91 char digit_separators; | |
| 92 char trigraphs; | |
| 93 char utf8_char_literals; | |
| 131 | 94 char va_opt; |
| 145 | 95 char scope; |
| 96 char dfp_constants; | |
| 0 | 97 }; |
| 98 | |
| 99 static const struct lang_flags lang_defaults[] = | |
| 145 | 100 { /* c99 c++ xnum xid c11 std digr ulit rlit udlit bincst digsep trig u8chlit vaopt scope dfp */ |
| 101 /* GNUC89 */ { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0 }, | |
| 102 /* GNUC99 */ { 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0 }, | |
| 103 /* GNUC11 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0 }, | |
| 104 /* GNUC17 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0 }, | |
| 105 /* GNUC2X */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1 }, | |
| 106 /* STDC89 */ { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 }, | |
| 107 /* STDC94 */ { 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 }, | |
| 108 /* STDC99 */ { 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 }, | |
| 109 /* STDC11 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0 }, | |
| 110 /* STDC17 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0 }, | |
| 111 /* STDC2X */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1 }, | |
| 112 /* GNUCXX */ { 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0 }, | |
| 113 /* CXX98 */ { 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0 }, | |
| 114 /* GNUCXX11 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0 }, | |
| 115 /* CXX11 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 1, 0 }, | |
| 116 /* GNUCXX14 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0 }, | |
| 117 /* CXX14 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0 }, | |
| 118 /* GNUCXX17 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0 }, | |
| 119 /* CXX17 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0 }, | |
| 120 /* GNUCXX2A */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0 }, | |
| 121 /* CXX2A */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0 }, | |
| 122 /* ASM */ { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } | |
| 0 | 123 }; |
| 124 | |
| 125 /* Sets internal flags correctly for a given language. */ | |
| 126 void | |
| 127 cpp_set_lang (cpp_reader *pfile, enum c_lang lang) | |
| 128 { | |
| 129 const struct lang_flags *l = &lang_defaults[(int) lang]; | |
| 130 | |
| 131 CPP_OPTION (pfile, lang) = lang; | |
| 132 | |
| 133 CPP_OPTION (pfile, c99) = l->c99; | |
| 134 CPP_OPTION (pfile, cplusplus) = l->cplusplus; | |
| 135 CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; | |
| 136 CPP_OPTION (pfile, extended_identifiers) = l->extended_identifiers; | |
| 111 | 137 CPP_OPTION (pfile, c11_identifiers) = l->c11_identifiers; |
| 0 | 138 CPP_OPTION (pfile, std) = l->std; |
| 139 CPP_OPTION (pfile, digraphs) = l->digraphs; | |
| 140 CPP_OPTION (pfile, uliterals) = l->uliterals; | |
| 111 | 141 CPP_OPTION (pfile, rliterals) = l->rliterals; |
| 142 CPP_OPTION (pfile, user_literals) = l->user_literals; | |
| 143 CPP_OPTION (pfile, binary_constants) = l->binary_constants; | |
| 144 CPP_OPTION (pfile, digit_separators) = l->digit_separators; | |
| 145 CPP_OPTION (pfile, trigraphs) = l->trigraphs; | |
| 146 CPP_OPTION (pfile, utf8_char_literals) = l->utf8_char_literals; | |
| 131 | 147 CPP_OPTION (pfile, va_opt) = l->va_opt; |
| 145 | 148 CPP_OPTION (pfile, scope) = l->scope; |
| 149 CPP_OPTION (pfile, dfp_constants) = l->dfp_constants; | |
| 0 | 150 } |
| 151 | |
| 152 /* Initialize library global state. */ | |
| 153 static void | |
| 154 init_library (void) | |
| 155 { | |
| 156 static int initialized = 0; | |
| 157 | |
| 158 if (! initialized) | |
| 159 { | |
| 160 initialized = 1; | |
| 161 | |
| 111 | 162 _cpp_init_lexer (); |
| 163 | |
| 0 | 164 /* Set up the trigraph map. This doesn't need to do anything if |
| 165 we were compiled with a compiler that supports C99 designated | |
| 166 initializers. */ | |
| 167 init_trigraph_map (); | |
| 168 | |
| 169 #ifdef ENABLE_NLS | |
| 170 (void) bindtextdomain (PACKAGE, LOCALEDIR); | |
| 171 #endif | |
| 172 } | |
| 173 } | |
| 174 | |
| 175 /* Initialize a cpp_reader structure. */ | |
| 176 cpp_reader * | |
| 111 | 177 cpp_create_reader (enum c_lang lang, cpp_hash_table *table, |
| 145 | 178 class line_maps *line_table) |
| 0 | 179 { |
| 180 cpp_reader *pfile; | |
| 181 | |
| 182 /* Initialize this instance of the library if it hasn't been already. */ | |
| 183 init_library (); | |
| 184 | |
| 185 pfile = XCNEW (cpp_reader); | |
| 111 | 186 memset (&pfile->base_context, 0, sizeof (pfile->base_context)); |
| 0 | 187 |
| 188 cpp_set_lang (pfile, lang); | |
| 189 CPP_OPTION (pfile, warn_multichar) = 1; | |
| 190 CPP_OPTION (pfile, discard_comments) = 1; | |
| 191 CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; | |
| 145 | 192 CPP_OPTION (pfile, max_include_depth) = 200; |
| 0 | 193 CPP_OPTION (pfile, tabstop) = 8; |
| 194 CPP_OPTION (pfile, operator_names) = 1; | |
| 195 CPP_OPTION (pfile, warn_trigraphs) = 2; | |
| 196 CPP_OPTION (pfile, warn_endif_labels) = 1; | |
| 111 | 197 CPP_OPTION (pfile, cpp_warn_c90_c99_compat) = -1; |
| 145 | 198 CPP_OPTION (pfile, cpp_warn_c11_c2x_compat) = -1; |
| 111 | 199 CPP_OPTION (pfile, cpp_warn_cxx11_compat) = 0; |
|
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200 CPP_OPTION (pfile, cpp_warn_deprecated) = 1; |
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201 CPP_OPTION (pfile, cpp_warn_long_long) = 0; |
| 0 | 202 CPP_OPTION (pfile, dollars_in_ident) = 1; |
| 203 CPP_OPTION (pfile, warn_dollars) = 1; | |
| 204 CPP_OPTION (pfile, warn_variadic_macros) = 1; | |
| 205 CPP_OPTION (pfile, warn_builtin_macro_redefined) = 1; | |
| 111 | 206 CPP_OPTION (pfile, cpp_warn_implicit_fallthrough) = 0; |
| 207 /* By default, track locations of tokens resulting from macro | |
| 208 expansion. The '2' means, track the locations with the highest | |
| 209 accuracy. Read the comments for struct | |
| 210 cpp_options::track_macro_expansion to learn about the other | |
| 211 values. */ | |
| 212 CPP_OPTION (pfile, track_macro_expansion) = 2; | |
| 0 | 213 CPP_OPTION (pfile, warn_normalize) = normalized_C; |
| 111 | 214 CPP_OPTION (pfile, warn_literal_suffix) = 1; |
| 215 CPP_OPTION (pfile, canonical_system_headers) | |
| 216 = ENABLE_CANONICAL_SYSTEM_HEADERS; | |
| 217 CPP_OPTION (pfile, ext_numeric_literals) = 1; | |
| 218 CPP_OPTION (pfile, warn_date_time) = 0; | |
| 0 | 219 |
| 220 /* Default CPP arithmetic to something sensible for the host for the | |
| 221 benefit of dumb users like fix-header. */ | |
| 222 CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); | |
| 223 CPP_OPTION (pfile, char_precision) = CHAR_BIT; | |
| 224 CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); | |
| 225 CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); | |
| 226 CPP_OPTION (pfile, unsigned_char) = 0; | |
| 227 CPP_OPTION (pfile, unsigned_wchar) = 1; | |
| 228 CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */ | |
| 229 | |
| 230 /* Default to no charset conversion. */ | |
| 231 CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding (); | |
| 232 CPP_OPTION (pfile, wide_charset) = 0; | |
| 233 | |
| 234 /* Default the input character set to UTF-8. */ | |
| 235 CPP_OPTION (pfile, input_charset) = _cpp_default_encoding (); | |
| 236 | |
| 237 /* A fake empty "directory" used as the starting point for files | |
| 238 looked up without a search path. Name cannot be '/' because we | |
| 239 don't want to prepend anything at all to filenames using it. All | |
| 240 other entries are correct zero-initialized. */ | |
| 241 pfile->no_search_path.name = (char *) ""; | |
| 242 | |
| 243 /* Initialize the line map. */ | |
| 244 pfile->line_table = line_table; | |
| 245 | |
| 246 /* Initialize lexer state. */ | |
| 247 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); | |
| 248 | |
| 249 /* Set up static tokens. */ | |
| 250 pfile->avoid_paste.type = CPP_PADDING; | |
| 251 pfile->avoid_paste.val.source = NULL; | |
| 252 pfile->eof.type = CPP_EOF; | |
| 253 pfile->eof.flags = 0; | |
| 254 | |
| 255 /* Create a token buffer for the lexer. */ | |
| 256 _cpp_init_tokenrun (&pfile->base_run, 250); | |
| 257 pfile->cur_run = &pfile->base_run; | |
| 258 pfile->cur_token = pfile->base_run.base; | |
| 259 | |
| 260 /* Initialize the base context. */ | |
| 261 pfile->context = &pfile->base_context; | |
| 111 | 262 pfile->base_context.c.macro = 0; |
| 0 | 263 pfile->base_context.prev = pfile->base_context.next = 0; |
| 264 | |
| 265 /* Aligned and unaligned storage. */ | |
| 266 pfile->a_buff = _cpp_get_buff (pfile, 0); | |
| 267 pfile->u_buff = _cpp_get_buff (pfile, 0); | |
| 268 | |
|
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269 /* Initialize table for push_macro/pop_macro. */ |
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270 pfile->pushed_macros = 0; |
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271 |
| 111 | 272 /* Do not force token locations by default. */ |
| 145 | 273 pfile->forced_token_location = 0; |
| 111 | 274 |
| 275 /* Initialize source_date_epoch to -2 (not yet set). */ | |
| 276 pfile->source_date_epoch = (time_t) -2; | |
| 277 | |
| 0 | 278 /* The expression parser stack. */ |
| 279 _cpp_expand_op_stack (pfile); | |
| 280 | |
| 281 /* Initialize the buffer obstack. */ | |
| 111 | 282 obstack_specify_allocation (&pfile->buffer_ob, 0, 0, xmalloc, free); |
| 0 | 283 |
| 284 _cpp_init_files (pfile); | |
| 285 | |
| 286 _cpp_init_hashtable (pfile, table); | |
| 287 | |
| 288 return pfile; | |
| 289 } | |
| 290 | |
| 291 /* Set the line_table entry in PFILE. This is called after reading a | |
| 292 PCH file, as the old line_table will be incorrect. */ | |
| 293 void | |
| 145 | 294 cpp_set_line_map (cpp_reader *pfile, class line_maps *line_table) |
| 0 | 295 { |
| 296 pfile->line_table = line_table; | |
| 297 } | |
| 298 | |
| 299 /* Free resources used by PFILE. Accessing PFILE after this function | |
| 300 returns leads to undefined behavior. Returns the error count. */ | |
| 301 void | |
| 302 cpp_destroy (cpp_reader *pfile) | |
| 303 { | |
| 304 cpp_context *context, *contextn; | |
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305 struct def_pragma_macro *pmacro; |
| 0 | 306 tokenrun *run, *runn; |
| 307 int i; | |
| 308 | |
| 309 free (pfile->op_stack); | |
| 310 | |
| 311 while (CPP_BUFFER (pfile) != NULL) | |
| 312 _cpp_pop_buffer (pfile); | |
| 313 | |
| 111 | 314 free (pfile->out.base); |
| 0 | 315 |
| 316 if (pfile->macro_buffer) | |
| 317 { | |
| 318 free (pfile->macro_buffer); | |
| 319 pfile->macro_buffer = NULL; | |
| 320 pfile->macro_buffer_len = 0; | |
| 321 } | |
| 322 | |
| 323 if (pfile->deps) | |
| 324 deps_free (pfile->deps); | |
| 325 obstack_free (&pfile->buffer_ob, 0); | |
| 326 | |
| 327 _cpp_destroy_hashtable (pfile); | |
| 328 _cpp_cleanup_files (pfile); | |
| 329 _cpp_destroy_iconv (pfile); | |
| 330 | |
| 331 _cpp_free_buff (pfile->a_buff); | |
| 332 _cpp_free_buff (pfile->u_buff); | |
| 333 _cpp_free_buff (pfile->free_buffs); | |
| 334 | |
| 335 for (run = &pfile->base_run; run; run = runn) | |
| 336 { | |
| 337 runn = run->next; | |
| 338 free (run->base); | |
| 339 if (run != &pfile->base_run) | |
| 340 free (run); | |
| 341 } | |
| 342 | |
| 343 for (context = pfile->base_context.next; context; context = contextn) | |
| 344 { | |
| 345 contextn = context->next; | |
| 346 free (context); | |
| 347 } | |
| 348 | |
| 349 if (pfile->comments.entries) | |
| 350 { | |
| 351 for (i = 0; i < pfile->comments.count; i++) | |
| 352 free (pfile->comments.entries[i].comment); | |
| 353 | |
| 354 free (pfile->comments.entries); | |
| 355 } | |
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356 if (pfile->pushed_macros) |
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357 { |
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358 do |
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359 { |
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360 pmacro = pfile->pushed_macros; |
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361 pfile->pushed_macros = pmacro->next; |
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362 free (pmacro->name); |
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363 free (pmacro); |
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364 } |
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365 while (pfile->pushed_macros); |
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366 } |
| 0 | 367 |
| 368 free (pfile); | |
| 369 } | |
| 370 | |
| 371 /* This structure defines one built-in identifier. A node will be | |
| 372 entered in the hash table under the name NAME, with value VALUE. | |
| 373 | |
| 374 There are two tables of these. builtin_array holds all the | |
| 375 "builtin" macros: these are handled by builtin_macro() in | |
| 376 macro.c. Builtin is somewhat of a misnomer -- the property of | |
| 377 interest is that these macros require special code to compute their | |
|
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378 expansions. The value is a "cpp_builtin_type" enumerator. |
| 0 | 379 |
| 380 operator_array holds the C++ named operators. These are keywords | |
| 381 which act as aliases for punctuators. In C++, they cannot be | |
| 382 altered through #define, and #if recognizes them as operators. In | |
| 383 C, these are not entered into the hash table at all (but see | |
| 384 <iso646.h>). The value is a token-type enumerator. */ | |
| 385 struct builtin_macro | |
| 386 { | |
| 387 const uchar *const name; | |
| 388 const unsigned short len; | |
| 389 const unsigned short value; | |
| 390 const bool always_warn_if_redefined; | |
| 391 }; | |
| 392 | |
| 393 #define B(n, t, f) { DSC(n), t, f } | |
| 394 static const struct builtin_macro builtin_array[] = | |
| 395 { | |
| 396 B("__TIMESTAMP__", BT_TIMESTAMP, false), | |
| 397 B("__TIME__", BT_TIME, false), | |
| 398 B("__DATE__", BT_DATE, false), | |
| 399 B("__FILE__", BT_FILE, false), | |
| 400 B("__BASE_FILE__", BT_BASE_FILE, false), | |
| 401 B("__LINE__", BT_SPECLINE, true), | |
| 402 B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL, true), | |
| 403 B("__COUNTER__", BT_COUNTER, true), | |
| 111 | 404 B("__has_attribute", BT_HAS_ATTRIBUTE, true), |
| 405 B("__has_cpp_attribute", BT_HAS_ATTRIBUTE, true), | |
| 145 | 406 B("__has_builtin", BT_HAS_BUILTIN, true), |
| 407 B("__has_include", BT_HAS_INCLUDE, true), | |
| 408 B("__has_include_next",BT_HAS_INCLUDE_NEXT, true), | |
| 0 | 409 /* Keep builtins not used for -traditional-cpp at the end, and |
| 410 update init_builtins() if any more are added. */ | |
| 411 B("_Pragma", BT_PRAGMA, true), | |
| 412 B("__STDC__", BT_STDC, true), | |
| 413 }; | |
| 414 #undef B | |
| 415 | |
| 416 struct builtin_operator | |
| 417 { | |
| 418 const uchar *const name; | |
| 419 const unsigned short len; | |
| 420 const unsigned short value; | |
| 421 }; | |
| 422 | |
| 423 #define B(n, t) { DSC(n), t } | |
| 424 static const struct builtin_operator operator_array[] = | |
| 425 { | |
| 426 B("and", CPP_AND_AND), | |
| 427 B("and_eq", CPP_AND_EQ), | |
| 428 B("bitand", CPP_AND), | |
| 429 B("bitor", CPP_OR), | |
| 430 B("compl", CPP_COMPL), | |
| 431 B("not", CPP_NOT), | |
| 432 B("not_eq", CPP_NOT_EQ), | |
| 433 B("or", CPP_OR_OR), | |
| 434 B("or_eq", CPP_OR_EQ), | |
| 435 B("xor", CPP_XOR), | |
| 436 B("xor_eq", CPP_XOR_EQ) | |
| 437 }; | |
| 438 #undef B | |
| 439 | |
| 440 /* Mark the C++ named operators in the hash table. */ | |
| 441 static void | |
|
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442 mark_named_operators (cpp_reader *pfile, int flags) |
| 0 | 443 { |
| 444 const struct builtin_operator *b; | |
| 445 | |
| 446 for (b = operator_array; | |
| 447 b < (operator_array + ARRAY_SIZE (operator_array)); | |
| 448 b++) | |
| 449 { | |
| 450 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
|
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451 hp->flags |= flags; |
| 0 | 452 hp->is_directive = 0; |
| 453 hp->directive_index = b->value; | |
| 454 } | |
| 455 } | |
| 456 | |
|
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457 /* Helper function of cpp_type2name. Return the string associated with |
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458 named operator TYPE. */ |
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459 const char * |
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460 cpp_named_operator2name (enum cpp_ttype type) |
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461 { |
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462 const struct builtin_operator *b; |
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463 |
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464 for (b = operator_array; |
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465 b < (operator_array + ARRAY_SIZE (operator_array)); |
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466 b++) |
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467 { |
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468 if (type == b->value) |
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469 return (const char *) b->name; |
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470 } |
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471 |
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472 return NULL; |
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473 } |
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474 |
| 0 | 475 void |
| 476 cpp_init_special_builtins (cpp_reader *pfile) | |
| 477 { | |
| 478 const struct builtin_macro *b; | |
| 479 size_t n = ARRAY_SIZE (builtin_array); | |
| 480 | |
| 481 if (CPP_OPTION (pfile, traditional)) | |
| 482 n -= 2; | |
| 483 else if (! CPP_OPTION (pfile, stdc_0_in_system_headers) | |
| 484 || CPP_OPTION (pfile, std)) | |
| 485 n--; | |
| 486 | |
| 487 for (b = builtin_array; b < builtin_array + n; b++) | |
| 488 { | |
| 145 | 489 if ((b->value == BT_HAS_ATTRIBUTE |
| 490 || b->value == BT_HAS_BUILTIN) | |
| 111 | 491 && (CPP_OPTION (pfile, lang) == CLK_ASM |
| 492 || pfile->cb.has_attribute == NULL)) | |
| 493 continue; | |
| 0 | 494 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
| 131 | 495 hp->type = NT_BUILTIN_MACRO; |
| 111 | 496 if (b->always_warn_if_redefined) |
| 0 | 497 hp->flags |= NODE_WARN; |
|
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498 hp->value.builtin = (enum cpp_builtin_type) b->value; |
| 0 | 499 } |
| 500 } | |
| 501 | |
| 145 | 502 /* Restore macro C to builtin macro definition. */ |
| 503 | |
| 504 void | |
| 505 _cpp_restore_special_builtin (cpp_reader *pfile, struct def_pragma_macro *c) | |
| 506 { | |
| 507 size_t len = strlen (c->name); | |
| 508 | |
| 509 for (const struct builtin_macro *b = builtin_array; | |
| 510 b < builtin_array + ARRAY_SIZE (builtin_array); b++) | |
| 511 if (b->len == len && memcmp (c->name, b->name, len + 1) == 0) | |
| 512 { | |
| 513 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); | |
| 514 hp->type = NT_BUILTIN_MACRO; | |
| 515 if (b->always_warn_if_redefined) | |
| 516 hp->flags |= NODE_WARN; | |
| 517 hp->value.builtin = (enum cpp_builtin_type) b->value; | |
| 518 } | |
| 519 } | |
| 520 | |
| 0 | 521 /* Read the builtins table above and enter them, and language-specific |
| 522 macros, into the hash table. HOSTED is true if this is a hosted | |
| 523 environment. */ | |
| 524 void | |
| 525 cpp_init_builtins (cpp_reader *pfile, int hosted) | |
| 526 { | |
| 527 cpp_init_special_builtins (pfile); | |
| 528 | |
| 529 if (!CPP_OPTION (pfile, traditional) | |
| 530 && (! CPP_OPTION (pfile, stdc_0_in_system_headers) | |
| 531 || CPP_OPTION (pfile, std))) | |
| 532 _cpp_define_builtin (pfile, "__STDC__ 1"); | |
| 533 | |
| 534 if (CPP_OPTION (pfile, cplusplus)) | |
| 111 | 535 { |
| 536 if (CPP_OPTION (pfile, lang) == CLK_CXX2A | |
| 537 || CPP_OPTION (pfile, lang) == CLK_GNUCXX2A) | |
| 538 _cpp_define_builtin (pfile, "__cplusplus 201709L"); | |
| 539 else if (CPP_OPTION (pfile, lang) == CLK_CXX17 | |
| 540 || CPP_OPTION (pfile, lang) == CLK_GNUCXX17) | |
| 541 _cpp_define_builtin (pfile, "__cplusplus 201703L"); | |
| 542 else if (CPP_OPTION (pfile, lang) == CLK_CXX14 | |
| 543 || CPP_OPTION (pfile, lang) == CLK_GNUCXX14) | |
| 544 _cpp_define_builtin (pfile, "__cplusplus 201402L"); | |
| 545 else if (CPP_OPTION (pfile, lang) == CLK_CXX11 | |
| 546 || CPP_OPTION (pfile, lang) == CLK_GNUCXX11) | |
| 547 _cpp_define_builtin (pfile, "__cplusplus 201103L"); | |
| 548 else | |
| 549 _cpp_define_builtin (pfile, "__cplusplus 199711L"); | |
| 550 } | |
| 0 | 551 else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
| 552 _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); | |
| 553 else if (CPP_OPTION (pfile, lang) == CLK_STDC94) | |
| 554 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); | |
| 131 | 555 else if (CPP_OPTION (pfile, lang) == CLK_STDC2X |
| 556 || CPP_OPTION (pfile, lang) == CLK_GNUC2X) | |
| 557 _cpp_define_builtin (pfile, "__STDC_VERSION__ 202000L"); | |
| 558 else if (CPP_OPTION (pfile, lang) == CLK_STDC17 | |
| 559 || CPP_OPTION (pfile, lang) == CLK_GNUC17) | |
| 560 _cpp_define_builtin (pfile, "__STDC_VERSION__ 201710L"); | |
| 111 | 561 else if (CPP_OPTION (pfile, lang) == CLK_STDC11 |
| 562 || CPP_OPTION (pfile, lang) == CLK_GNUC11) | |
| 563 _cpp_define_builtin (pfile, "__STDC_VERSION__ 201112L"); | |
| 0 | 564 else if (CPP_OPTION (pfile, c99)) |
| 565 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); | |
| 566 | |
| 111 | 567 if (CPP_OPTION (pfile, uliterals) |
| 568 && !(CPP_OPTION (pfile, cplusplus) | |
| 569 && (CPP_OPTION (pfile, lang) == CLK_GNUCXX | |
| 570 || CPP_OPTION (pfile, lang) == CLK_CXX98))) | |
| 571 { | |
| 572 _cpp_define_builtin (pfile, "__STDC_UTF_16__ 1"); | |
| 573 _cpp_define_builtin (pfile, "__STDC_UTF_32__ 1"); | |
| 574 } | |
| 575 | |
| 0 | 576 if (hosted) |
| 577 _cpp_define_builtin (pfile, "__STDC_HOSTED__ 1"); | |
| 578 else | |
| 579 _cpp_define_builtin (pfile, "__STDC_HOSTED__ 0"); | |
| 580 | |
| 581 if (CPP_OPTION (pfile, objc)) | |
| 582 _cpp_define_builtin (pfile, "__OBJC__ 1"); | |
| 583 } | |
| 584 | |
| 585 /* Sanity-checks are dependent on command-line options, so it is | |
| 111 | 586 called as a subroutine of cpp_read_main_file. */ |
| 587 #if CHECKING_P | |
| 0 | 588 static void sanity_checks (cpp_reader *); |
| 589 static void sanity_checks (cpp_reader *pfile) | |
| 590 { | |
| 591 cppchar_t test = 0; | |
| 592 size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); | |
| 593 | |
| 594 /* Sanity checks for assumptions about CPP arithmetic and target | |
| 595 type precisions made by cpplib. */ | |
| 596 test--; | |
| 597 if (test < 1) | |
| 598 cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type"); | |
| 599 | |
| 600 if (CPP_OPTION (pfile, precision) > max_precision) | |
| 601 cpp_error (pfile, CPP_DL_ICE, | |
| 602 "preprocessor arithmetic has maximum precision of %lu bits;" | |
| 603 " target requires %lu bits", | |
| 604 (unsigned long) max_precision, | |
| 605 (unsigned long) CPP_OPTION (pfile, precision)); | |
| 606 | |
| 607 if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) | |
| 608 cpp_error (pfile, CPP_DL_ICE, | |
| 609 "CPP arithmetic must be at least as precise as a target int"); | |
| 610 | |
| 611 if (CPP_OPTION (pfile, char_precision) < 8) | |
| 612 cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide"); | |
| 613 | |
| 614 if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) | |
| 615 cpp_error (pfile, CPP_DL_ICE, | |
| 616 "target wchar_t is narrower than target char"); | |
| 617 | |
| 618 if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) | |
| 619 cpp_error (pfile, CPP_DL_ICE, | |
| 620 "target int is narrower than target char"); | |
| 621 | |
| 622 /* This is assumed in eval_token() and could be fixed if necessary. */ | |
| 623 if (sizeof (cppchar_t) > sizeof (cpp_num_part)) | |
| 624 cpp_error (pfile, CPP_DL_ICE, | |
| 625 "CPP half-integer narrower than CPP character"); | |
| 626 | |
| 627 if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) | |
| 628 cpp_error (pfile, CPP_DL_ICE, | |
| 629 "CPP on this host cannot handle wide character constants over" | |
| 630 " %lu bits, but the target requires %lu bits", | |
| 631 (unsigned long) BITS_PER_CPPCHAR_T, | |
| 632 (unsigned long) CPP_OPTION (pfile, wchar_precision)); | |
| 633 } | |
| 634 #else | |
| 635 # define sanity_checks(PFILE) | |
| 636 #endif | |
| 637 | |
| 638 /* This is called after options have been parsed, and partially | |
| 639 processed. */ | |
| 640 void | |
| 641 cpp_post_options (cpp_reader *pfile) | |
| 642 { | |
|
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643 int flags; |
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644 |
| 0 | 645 sanity_checks (pfile); |
| 646 | |
| 647 post_options (pfile); | |
| 648 | |
| 649 /* Mark named operators before handling command line macros. */ | |
|
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650 flags = 0; |
| 0 | 651 if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) |
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652 flags |= NODE_OPERATOR; |
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653 if (CPP_OPTION (pfile, warn_cxx_operator_names)) |
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654 flags |= NODE_DIAGNOSTIC | NODE_WARN_OPERATOR; |
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655 if (flags != 0) |
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656 mark_named_operators (pfile, flags); |
| 0 | 657 } |
| 658 | |
| 659 /* Setup for processing input from the file named FNAME, or stdin if | |
| 660 it is the empty string. Return the original filename | |
| 661 on success (e.g. foo.i->foo.c), or NULL on failure. */ | |
| 662 const char * | |
| 663 cpp_read_main_file (cpp_reader *pfile, const char *fname) | |
| 664 { | |
| 145 | 665 const location_t loc = 0; |
| 111 | 666 |
| 0 | 667 if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
| 668 { | |
| 669 if (!pfile->deps) | |
| 670 pfile->deps = deps_init (); | |
| 671 | |
| 672 /* Set the default target (if there is none already). */ | |
| 673 deps_add_default_target (pfile->deps, fname); | |
| 674 } | |
| 675 | |
| 676 pfile->main_file | |
| 145 | 677 = _cpp_find_file (pfile, fname, &pfile->no_search_path, /*angle=*/0, |
| 678 /*fake=*/false, /*preinclude=*/false, /*hasinclude=*/false, | |
| 111 | 679 loc); |
| 0 | 680 if (_cpp_find_failed (pfile->main_file)) |
| 681 return NULL; | |
| 682 | |
| 145 | 683 _cpp_stack_file (pfile, pfile->main_file, IT_MAIN, 0); |
| 0 | 684 |
| 685 /* For foo.i, read the original filename foo.c now, for the benefit | |
| 686 of the front ends. */ | |
| 687 if (CPP_OPTION (pfile, preprocessed)) | |
| 688 { | |
| 689 read_original_filename (pfile); | |
| 111 | 690 fname = |
| 691 ORDINARY_MAP_FILE_NAME | |
| 692 ((LINEMAPS_LAST_ORDINARY_MAP (pfile->line_table))); | |
| 0 | 693 } |
| 694 return fname; | |
| 695 } | |
| 696 | |
| 697 /* For preprocessed files, if the first tokens are of the form # NUM. | |
| 698 handle the directive so we know the original file name. This will | |
| 699 generate file_change callbacks, which the front ends must handle | |
| 700 appropriately given their state of initialization. */ | |
| 701 static void | |
| 702 read_original_filename (cpp_reader *pfile) | |
| 703 { | |
| 704 const cpp_token *token, *token1; | |
| 705 | |
| 706 /* Lex ahead; if the first tokens are of the form # NUM, then | |
| 707 process the directive, otherwise back up. */ | |
| 708 token = _cpp_lex_direct (pfile); | |
| 709 if (token->type == CPP_HASH) | |
| 710 { | |
| 711 pfile->state.in_directive = 1; | |
| 712 token1 = _cpp_lex_direct (pfile); | |
| 713 _cpp_backup_tokens (pfile, 1); | |
| 714 pfile->state.in_directive = 0; | |
| 715 | |
| 716 /* If it's a #line directive, handle it. */ | |
|
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717 if (token1->type == CPP_NUMBER |
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718 && _cpp_handle_directive (pfile, token->flags & PREV_WHITE)) |
| 0 | 719 { |
| 720 read_original_directory (pfile); | |
| 721 return; | |
| 722 } | |
| 723 } | |
| 724 | |
| 725 /* Backup as if nothing happened. */ | |
| 726 _cpp_backup_tokens (pfile, 1); | |
| 727 } | |
| 728 | |
| 729 /* For preprocessed files, if the tokens following the first filename | |
| 730 line is of the form # <line> "/path/name//", handle the | |
| 731 directive so we know the original current directory. */ | |
| 732 static void | |
| 733 read_original_directory (cpp_reader *pfile) | |
| 734 { | |
| 735 const cpp_token *hash, *token; | |
| 736 | |
| 737 /* Lex ahead; if the first tokens are of the form # NUM, then | |
| 738 process the directive, otherwise back up. */ | |
| 739 hash = _cpp_lex_direct (pfile); | |
| 740 if (hash->type != CPP_HASH) | |
| 741 { | |
| 742 _cpp_backup_tokens (pfile, 1); | |
| 743 return; | |
| 744 } | |
| 745 | |
| 746 token = _cpp_lex_direct (pfile); | |
| 747 | |
| 748 if (token->type != CPP_NUMBER) | |
| 749 { | |
| 750 _cpp_backup_tokens (pfile, 2); | |
| 751 return; | |
| 752 } | |
| 753 | |
| 754 token = _cpp_lex_direct (pfile); | |
| 755 | |
| 756 if (token->type != CPP_STRING | |
| 757 || ! (token->val.str.len >= 5 | |
| 111 | 758 && IS_DIR_SEPARATOR (token->val.str.text[token->val.str.len-2]) |
| 759 && IS_DIR_SEPARATOR (token->val.str.text[token->val.str.len-3]))) | |
| 0 | 760 { |
| 761 _cpp_backup_tokens (pfile, 3); | |
| 762 return; | |
| 763 } | |
| 764 | |
| 765 if (pfile->cb.dir_change) | |
| 766 { | |
| 767 char *debugdir = (char *) alloca (token->val.str.len - 3); | |
| 768 | |
| 769 memcpy (debugdir, (const char *) token->val.str.text + 1, | |
| 770 token->val.str.len - 4); | |
| 771 debugdir[token->val.str.len - 4] = '\0'; | |
| 772 | |
| 773 pfile->cb.dir_change (pfile, debugdir); | |
| 774 } | |
| 775 } | |
| 776 | |
| 777 /* This is called at the end of preprocessing. It pops the last | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
778 buffer and writes dependency output. |
| 0 | 779 |
| 780 Maybe it should also reset state, such that you could call | |
| 781 cpp_start_read with a new filename to restart processing. */ | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
47
diff
changeset
|
782 void |
| 0 | 783 cpp_finish (cpp_reader *pfile, FILE *deps_stream) |
| 784 { | |
| 785 /* Warn about unused macros before popping the final buffer. */ | |
| 786 if (CPP_OPTION (pfile, warn_unused_macros)) | |
| 787 cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); | |
| 788 | |
| 789 /* lex.c leaves the final buffer on the stack. This it so that | |
| 790 it returns an unending stream of CPP_EOFs to the client. If we | |
| 791 popped the buffer, we'd dereference a NULL buffer pointer and | |
| 792 segfault. It's nice to allow the client to do worry-free excess | |
| 793 cpp_get_token calls. */ | |
| 794 while (pfile->buffer) | |
| 795 _cpp_pop_buffer (pfile); | |
| 796 | |
| 145 | 797 if (CPP_OPTION (pfile, deps.style) != DEPS_NONE && deps_stream) |
| 798 deps_write (pfile->deps, deps_stream, | |
| 799 CPP_OPTION (pfile, deps.phony_targets), 72); | |
| 0 | 800 |
| 801 /* Report on headers that could use multiple include guards. */ | |
| 802 if (CPP_OPTION (pfile, print_include_names)) | |
| 803 _cpp_report_missing_guards (pfile); | |
| 804 } | |
| 805 | |
| 806 static void | |
| 807 post_options (cpp_reader *pfile) | |
| 808 { | |
| 809 /* -Wtraditional is not useful in C++ mode. */ | |
| 810 if (CPP_OPTION (pfile, cplusplus)) | |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
811 CPP_OPTION (pfile, cpp_warn_traditional) = 0; |
| 0 | 812 |
| 813 /* Permanently disable macro expansion if we are rescanning | |
| 814 preprocessed text. Read preprocesed source in ISO mode. */ | |
| 815 if (CPP_OPTION (pfile, preprocessed)) | |
| 816 { | |
| 817 if (!CPP_OPTION (pfile, directives_only)) | |
| 818 pfile->state.prevent_expansion = 1; | |
| 819 CPP_OPTION (pfile, traditional) = 0; | |
| 820 } | |
| 821 | |
| 822 if (CPP_OPTION (pfile, warn_trigraphs) == 2) | |
| 823 CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs); | |
| 824 | |
| 825 if (CPP_OPTION (pfile, traditional)) | |
| 826 { | |
| 827 CPP_OPTION (pfile, trigraphs) = 0; | |
| 828 CPP_OPTION (pfile, warn_trigraphs) = 0; | |
| 829 } | |
| 830 } |