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Commit | Line | Data |
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b9305c66 | 1 | /* Mainly the interface between cpplib and the C front ends. |
85ec4feb | 2 | Copyright (C) 1987-2018 Free Software Foundation, Inc. |
e8bbfc4e | 3 | |
1322177d | 4 | This file is part of GCC. |
e8bbfc4e | 5 | |
1322177d LB |
6 | GCC is free software; you can redistribute it and/or modify it under |
7 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 8 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 9 | version. |
e8bbfc4e | 10 | |
1322177d LB |
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
e8bbfc4e RK |
15 | |
16 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
e8bbfc4e | 19 | |
e9a25f70 | 20 | #include "config.h" |
670ee920 | 21 | #include "system.h" |
4977bab6 | 22 | #include "coretypes.h" |
2adfab87 | 23 | #include "target.h" |
2adfab87 AM |
24 | #include "c-common.h" |
25 | #include "timevar.h" | |
d8a2d370 DN |
26 | #include "stringpool.h" |
27 | #include "stor-layout.h" | |
3d6f7931 | 28 | #include "c-pragma.h" |
7f905405 | 29 | #include "debug.h" |
7365279f | 30 | #include "file-prefix-map.h" /* remap_macro_filename() */ |
ab87f8c8 | 31 | |
42fd12b1 ESR |
32 | #include "attribs.h" |
33 | ||
0e5921e8 ZW |
34 | /* We may keep statistics about how long which files took to compile. */ |
35 | static int header_time, body_time; | |
36 | static splay_tree file_info_tree; | |
3ab6dd7c | 37 | |
0e5921e8 ZW |
38 | int pending_lang_change; /* If we need to switch languages - C++ only */ |
39 | int c_header_level; /* depth in C headers - C++ only */ | |
0173bb6f | 40 | |
2d7aa578 ESR |
41 | static tree interpret_integer (const cpp_token *, unsigned int, |
42 | enum overflow_type *); | |
43 | static tree interpret_float (const cpp_token *, unsigned int, const char *, | |
44 | enum overflow_type *); | |
14c931f1 | 45 | static tree interpret_fixed (const cpp_token *, unsigned int); |
5e9754af | 46 | static enum integer_type_kind narrowest_unsigned_type |
807e902e | 47 | (const widest_int &, unsigned int); |
5e9754af | 48 | static enum integer_type_kind narrowest_signed_type |
807e902e | 49 | (const widest_int &, unsigned int); |
46c2514e | 50 | static enum cpp_ttype lex_string (const cpp_token *, tree *, bool, bool); |
2f6e4e97 AJ |
51 | static tree lex_charconst (const cpp_token *); |
52 | static void update_header_times (const char *); | |
53 | static int dump_one_header (splay_tree_node, void *); | |
54 | static void cb_line_change (cpp_reader *, const cpp_token *, int); | |
55 | static void cb_ident (cpp_reader *, unsigned int, const cpp_string *); | |
56 | static void cb_def_pragma (cpp_reader *, unsigned int); | |
57 | static void cb_define (cpp_reader *, unsigned int, cpp_hashnode *); | |
58 | static void cb_undef (cpp_reader *, unsigned int, cpp_hashnode *); | |
e31c7eec | 59 | \f |
63973df3 | 60 | void |
2f6e4e97 | 61 | init_c_lex (void) |
e3d1fd32 | 62 | { |
b61c5ed0 | 63 | struct cpp_callbacks *cb; |
0e5921e8 ZW |
64 | struct c_fileinfo *toplevel; |
65 | ||
5d709b00 ZW |
66 | /* The get_fileinfo data structure must be initialized before |
67 | cpp_read_main_file is called. */ | |
a8a05998 | 68 | toplevel = get_fileinfo ("<top level>"); |
0e5921e8 ZW |
69 | if (flag_detailed_statistics) |
70 | { | |
71 | header_time = 0; | |
72 | body_time = get_run_time (); | |
73 | toplevel->time = body_time; | |
74 | } | |
2f6e4e97 | 75 | |
b61c5ed0 NB |
76 | cb = cpp_get_callbacks (parse_in); |
77 | ||
97293897 | 78 | cb->line_change = cb_line_change; |
b61c5ed0 | 79 | cb->ident = cb_ident; |
b61c5ed0 | 80 | cb->def_pragma = cb_def_pragma; |
17211ab5 GK |
81 | cb->valid_pch = c_common_valid_pch; |
82 | cb->read_pch = c_common_read_pch; | |
1f8d3e84 | 83 | cb->has_attribute = c_common_has_attribute; |
15c98b2e | 84 | cb->get_source_date_epoch = cb_get_source_date_epoch; |
cb18fd07 | 85 | cb->get_suggestion = cb_get_suggestion; |
7365279f | 86 | cb->remap_filename = remap_macro_filename; |
0e5921e8 | 87 | |
65289a3a | 88 | /* Set the debug callbacks if we can use them. */ |
c6a13190 ILT |
89 | if ((debug_info_level == DINFO_LEVEL_VERBOSE |
90 | && (write_symbols == DWARF2_DEBUG | |
91 | || write_symbols == VMS_AND_DWARF2_DEBUG)) | |
92 | || flag_dump_go_spec != NULL) | |
65289a3a | 93 | { |
b61c5ed0 NB |
94 | cb->define = cb_define; |
95 | cb->undef = cb_undef; | |
65289a3a | 96 | } |
e3d1fd32 PB |
97 | } |
98 | ||
0e5921e8 | 99 | struct c_fileinfo * |
2f6e4e97 | 100 | get_fileinfo (const char *name) |
e3d1fd32 | 101 | { |
0e5921e8 ZW |
102 | splay_tree_node n; |
103 | struct c_fileinfo *fi; | |
104 | ||
5d709b00 | 105 | if (!file_info_tree) |
b0c31bc6 | 106 | file_info_tree = splay_tree_new (splay_tree_compare_strings, |
5d709b00 | 107 | 0, |
b0c31bc6 | 108 | splay_tree_delete_pointers); |
5d709b00 | 109 | |
0e5921e8 ZW |
110 | n = splay_tree_lookup (file_info_tree, (splay_tree_key) name); |
111 | if (n) | |
112 | return (struct c_fileinfo *) n->value; | |
113 | ||
5d038c4c | 114 | fi = XNEW (struct c_fileinfo); |
0e5921e8 ZW |
115 | fi->time = 0; |
116 | fi->interface_only = 0; | |
117 | fi->interface_unknown = 1; | |
118 | splay_tree_insert (file_info_tree, (splay_tree_key) name, | |
119 | (splay_tree_value) fi); | |
120 | return fi; | |
e56e519d | 121 | } |
e3d1fd32 | 122 | |
0e5921e8 | 123 | static void |
2f6e4e97 | 124 | update_header_times (const char *name) |
e8bbfc4e | 125 | { |
0e5921e8 ZW |
126 | /* Changing files again. This means currently collected time |
127 | is charged against header time, and body time starts back at 0. */ | |
128 | if (flag_detailed_statistics) | |
e8bbfc4e | 129 | { |
0e5921e8 ZW |
130 | int this_time = get_run_time (); |
131 | struct c_fileinfo *file = get_fileinfo (name); | |
132 | header_time += this_time - body_time; | |
133 | file->time += this_time - body_time; | |
134 | body_time = this_time; | |
e8bbfc4e RK |
135 | } |
136 | } | |
137 | ||
0e5921e8 | 138 | static int |
e18476eb | 139 | dump_one_header (splay_tree_node n, void * ARG_UNUSED (dummy)) |
e8bbfc4e | 140 | { |
0e5921e8 ZW |
141 | print_time ((const char *) n->key, |
142 | ((struct c_fileinfo *) n->value)->time); | |
143 | return 0; | |
e8bbfc4e | 144 | } |
e8bbfc4e RK |
145 | |
146 | void | |
2f6e4e97 | 147 | dump_time_statistics (void) |
e8bbfc4e | 148 | { |
8400e75e | 149 | struct c_fileinfo *file = get_fileinfo (LOCATION_FILE (input_location)); |
0e5921e8 ZW |
150 | int this_time = get_run_time (); |
151 | file->time += this_time - body_time; | |
152 | ||
153 | fprintf (stderr, "\n******\n"); | |
154 | print_time ("header files (total)", header_time); | |
155 | print_time ("main file (total)", this_time - body_time); | |
156 | fprintf (stderr, "ratio = %g : 1\n", | |
3f75a254 | 157 | (double) header_time / (double) (this_time - body_time)); |
0e5921e8 ZW |
158 | fprintf (stderr, "\n******\n"); |
159 | ||
160 | splay_tree_foreach (file_info_tree, dump_one_header, 0); | |
e8bbfc4e | 161 | } |
a6124a42 | 162 | |
0e5921e8 | 163 | static void |
e18476eb BI |
164 | cb_ident (cpp_reader * ARG_UNUSED (pfile), |
165 | unsigned int ARG_UNUSED (line), | |
166 | const cpp_string * ARG_UNUSED (str)) | |
0e5921e8 | 167 | { |
3f75a254 | 168 | if (!flag_no_ident) |
0e5921e8 | 169 | { |
27e2564a | 170 | /* Convert escapes in the string. */ |
e6cc3a24 | 171 | cpp_string cstr = { 0, 0 }; |
b6baa67d | 172 | if (cpp_interpret_string (pfile, str, 1, &cstr, CPP_STRING)) |
e6cc3a24 | 173 | { |
a8781821 | 174 | targetm.asm_out.output_ident ((const char *) cstr.text); |
b1d5455a | 175 | free (CONST_CAST (unsigned char *, cstr.text)); |
e6cc3a24 | 176 | } |
0e5921e8 | 177 | } |
27e2564a NB |
178 | } |
179 | ||
97293897 NB |
180 | /* Called at the start of every non-empty line. TOKEN is the first |
181 | lexed token on the line. Used for diagnostic line numbers. */ | |
182 | static void | |
e18476eb | 183 | cb_line_change (cpp_reader * ARG_UNUSED (pfile), const cpp_token *token, |
7b9a5a66 | 184 | int parsing_args) |
97293897 | 185 | { |
12f9df4e | 186 | if (token->type != CPP_EOF && !parsing_args) |
3c20847b | 187 | input_location = token->src_loc; |
97293897 NB |
188 | } |
189 | ||
23345bbb | 190 | void |
0e50b624 | 191 | fe_file_change (const line_map_ordinary *new_map) |
27e2564a | 192 | { |
f4b2bde7 | 193 | if (new_map == NULL) |
12f9df4e | 194 | return; |
f4b2bde7 | 195 | |
47d89cf3 | 196 | if (new_map->reason == LC_ENTER) |
fbb18613 | 197 | { |
5bea1ccf JM |
198 | /* Don't stack the main buffer on the input stack; |
199 | we already did in compile_file. */ | |
3f75a254 | 200 | if (!MAIN_FILE_P (new_map)) |
0e5921e8 | 201 | { |
f10a9135 | 202 | location_t included_at = linemap_included_from (new_map); |
711b2510 TT |
203 | int line = 0; |
204 | if (included_at > BUILTINS_LOCATION) | |
205 | line = SOURCE_LINE (new_map - 1, included_at); | |
3c20847b | 206 | |
966e8f4d | 207 | input_location = new_map->start_location; |
46427374 | 208 | (*debug_hooks->start_source_file) (line, LINEMAP_FILE (new_map)); |
09cff37b | 209 | #ifdef SYSTEM_IMPLICIT_EXTERN_C |
27e2564a NB |
210 | if (c_header_level) |
211 | ++c_header_level; | |
d17687f6 | 212 | else if (LINEMAP_SYSP (new_map) == 2) |
27e2564a NB |
213 | { |
214 | c_header_level = 1; | |
215 | ++pending_lang_change; | |
216 | } | |
0e5921e8 | 217 | #endif |
27e2564a | 218 | } |
fbb18613 | 219 | } |
47d89cf3 | 220 | else if (new_map->reason == LC_LEAVE) |
fbb18613 | 221 | { |
09cff37b | 222 | #ifdef SYSTEM_IMPLICIT_EXTERN_C |
47d89cf3 NB |
223 | if (c_header_level && --c_header_level == 0) |
224 | { | |
d17687f6 | 225 | if (LINEMAP_SYSP (new_map) == 2) |
d4ee4d25 | 226 | warning (0, "badly nested C headers from preprocessor"); |
47d89cf3 NB |
227 | --pending_lang_change; |
228 | } | |
47d89cf3 | 229 | #endif |
966e8f4d | 230 | input_location = new_map->start_location; |
2f6e4e97 | 231 | |
46427374 | 232 | (*debug_hooks->end_source_file) (LINEMAP_LINE (new_map)); |
e8bbfc4e | 233 | } |
fbb18613 | 234 | |
46427374 | 235 | update_header_times (LINEMAP_FILE (new_map)); |
3c20847b | 236 | input_location = new_map->start_location; |
0e5921e8 | 237 | } |
8b97c5f8 ZW |
238 | |
239 | static void | |
620e594b | 240 | cb_def_pragma (cpp_reader *pfile, location_t loc) |
8b97c5f8 ZW |
241 | { |
242 | /* Issue a warning message if we have been asked to do so. Ignore | |
243 | unknown pragmas in system headers unless an explicit | |
ec5c56db | 244 | -Wunknown-pragmas has been given. */ |
8400e75e | 245 | if (warn_unknown_pragmas > in_system_header_at (input_location)) |
8b97c5f8 | 246 | { |
b6ff777c ZW |
247 | const unsigned char *space, *name; |
248 | const cpp_token *s; | |
b6ff777c | 249 | location_t fe_loc = loc; |
23356f93 | 250 | |
06470238 | 251 | space = name = (const unsigned char *) ""; |
4ed5bcfb | 252 | s = cpp_get_token (pfile); |
06470238 NB |
253 | if (s->type != CPP_EOF) |
254 | { | |
255 | space = cpp_token_as_text (pfile, s); | |
256 | s = cpp_get_token (pfile); | |
257 | if (s->type == CPP_NAME) | |
258 | name = cpp_token_as_text (pfile, s); | |
259 | } | |
8b97c5f8 | 260 | |
fab922b1 MLI |
261 | warning_at (fe_loc, OPT_Wunknown_pragmas, "ignoring #pragma %s %s", |
262 | space, name); | |
8b97c5f8 ZW |
263 | } |
264 | } | |
0e5921e8 | 265 | |
65289a3a NB |
266 | /* #define callback for DWARF and DWARF2 debug info. */ |
267 | static void | |
620e594b | 268 | cb_define (cpp_reader *pfile, location_t loc, cpp_hashnode *node) |
65289a3a | 269 | { |
5ffeb913 | 270 | const struct line_map *map = linemap_lookup (line_table, loc); |
0e50b624 | 271 | (*debug_hooks->define) (SOURCE_LINE (linemap_check_ordinary (map), loc), |
7f905405 | 272 | (const char *) cpp_macro_definition (pfile, node)); |
65289a3a NB |
273 | } |
274 | ||
275 | /* #undef callback for DWARF and DWARF2 debug info. */ | |
276 | static void | |
620e594b | 277 | cb_undef (cpp_reader * ARG_UNUSED (pfile), location_t loc, |
2f6e4e97 | 278 | cpp_hashnode *node) |
65289a3a | 279 | { |
5ffeb913 | 280 | const struct line_map *map = linemap_lookup (line_table, loc); |
0e50b624 | 281 | (*debug_hooks->undef) (SOURCE_LINE (linemap_check_ordinary (map), loc), |
7f905405 | 282 | (const char *) NODE_NAME (node)); |
65289a3a | 283 | } |
42fd12b1 | 284 | |
1f8d3e84 JJ |
285 | /* Wrapper around cpp_get_token to skip CPP_PADDING tokens |
286 | and not consume CPP_EOF. */ | |
287 | static const cpp_token * | |
288 | get_token_no_padding (cpp_reader *pfile) | |
289 | { | |
290 | for (;;) | |
291 | { | |
292 | const cpp_token *ret = cpp_peek_token (pfile, 0); | |
293 | if (ret->type == CPP_EOF) | |
294 | return ret; | |
295 | ret = cpp_get_token (pfile); | |
296 | if (ret->type != CPP_PADDING) | |
297 | return ret; | |
298 | } | |
299 | } | |
300 | ||
42fd12b1 | 301 | /* Callback for has_attribute. */ |
1f8d3e84 JJ |
302 | int |
303 | c_common_has_attribute (cpp_reader *pfile) | |
42fd12b1 ESR |
304 | { |
305 | int result = 0; | |
1f8d3e84 | 306 | tree attr_name = NULL_TREE; |
42fd12b1 ESR |
307 | const cpp_token *token; |
308 | ||
1f8d3e84 JJ |
309 | token = get_token_no_padding (pfile); |
310 | if (token->type != CPP_OPEN_PAREN) | |
42fd12b1 | 311 | { |
1f8d3e84 JJ |
312 | cpp_error (pfile, CPP_DL_ERROR, |
313 | "missing '(' after \"__has_attribute\""); | |
314 | return 0; | |
42fd12b1 | 315 | } |
1f8d3e84 | 316 | token = get_token_no_padding (pfile); |
42fd12b1 ESR |
317 | if (token->type == CPP_NAME) |
318 | { | |
1f8d3e84 JJ |
319 | attr_name = get_identifier ((const char *) |
320 | cpp_token_as_text (pfile, token)); | |
577eec56 | 321 | attr_name = canonicalize_attr_name (attr_name); |
1f8d3e84 | 322 | if (c_dialect_cxx ()) |
42fd12b1 | 323 | { |
1f8d3e84 JJ |
324 | int idx = 0; |
325 | const cpp_token *nxt_token; | |
326 | do | |
327 | nxt_token = cpp_peek_token (pfile, idx++); | |
328 | while (nxt_token->type == CPP_PADDING); | |
329 | if (nxt_token->type == CPP_SCOPE) | |
42fd12b1 | 330 | { |
1f8d3e84 JJ |
331 | get_token_no_padding (pfile); // Eat scope. |
332 | nxt_token = get_token_no_padding (pfile); | |
333 | if (nxt_token->type == CPP_NAME) | |
334 | { | |
335 | tree attr_ns = attr_name; | |
336 | tree attr_id | |
337 | = get_identifier ((const char *) | |
338 | cpp_token_as_text (pfile, nxt_token)); | |
339 | attr_name = build_tree_list (attr_ns, attr_id); | |
340 | } | |
341 | else | |
342 | { | |
343 | cpp_error (pfile, CPP_DL_ERROR, | |
344 | "attribute identifier required after scope"); | |
345 | attr_name = NULL_TREE; | |
346 | } | |
42fd12b1 | 347 | } |
d067e05f | 348 | else |
42fd12b1 | 349 | { |
d067e05f | 350 | /* Some standard attributes need special handling. */ |
1f8d3e84 | 351 | if (is_attribute_p ("noreturn", attr_name)) |
42fd12b1 | 352 | result = 200809; |
1f8d3e84 | 353 | else if (is_attribute_p ("deprecated", attr_name)) |
42fd12b1 | 354 | result = 201309; |
b632761d | 355 | else if (is_attribute_p ("maybe_unused", attr_name) |
c6147dc4 MP |
356 | || is_attribute_p ("nodiscard", attr_name) |
357 | || is_attribute_p ("fallthrough", attr_name)) | |
d067e05f | 358 | result = 201603; |
bedf03a2 | 359 | else if (is_attribute_p ("no_unique_address", attr_name)) |
46c62690 | 360 | result = 201803; |
d067e05f JM |
361 | if (result) |
362 | attr_name = NULL_TREE; | |
42fd12b1 ESR |
363 | } |
364 | } | |
d067e05f JM |
365 | if (attr_name) |
366 | { | |
367 | init_attributes (); | |
368 | const struct attribute_spec *attr = lookup_attribute_spec (attr_name); | |
369 | if (attr) | |
370 | result = 1; | |
371 | } | |
42fd12b1 ESR |
372 | } |
373 | else | |
1f8d3e84 JJ |
374 | { |
375 | cpp_error (pfile, CPP_DL_ERROR, | |
376 | "macro \"__has_attribute\" requires an identifier"); | |
377 | return 0; | |
378 | } | |
42fd12b1 | 379 | |
1f8d3e84 | 380 | if (get_token_no_padding (pfile)->type != CPP_CLOSE_PAREN) |
42fd12b1 | 381 | cpp_error (pfile, CPP_DL_ERROR, |
1f8d3e84 | 382 | "missing ')' after \"__has_attribute\""); |
42fd12b1 ESR |
383 | |
384 | return result; | |
385 | } | |
e8bbfc4e | 386 | \f |
51e63e60 NS |
387 | /* Read a token and return its type. Fill *VALUE with its value, if |
388 | applicable. Fill *CPP_FLAGS with the token's flags, if it is | |
389 | non-NULL. */ | |
e6cc3a24 | 390 | |
f4086145 | 391 | enum cpp_ttype |
46c2514e TT |
392 | c_lex_with_flags (tree *value, location_t *loc, unsigned char *cpp_flags, |
393 | int lex_flags) | |
e6cc3a24 | 394 | { |
18c81520 | 395 | static bool no_more_pch; |
51e63e60 NS |
396 | const cpp_token *tok; |
397 | enum cpp_ttype type; | |
ab84748a | 398 | unsigned char add_flags = 0; |
2d7aa578 | 399 | enum overflow_type overflow = OT_NONE; |
e6cc3a24 | 400 | |
51e63e60 | 401 | timevar_push (TV_CPP); |
e6cc3a24 | 402 | retry: |
5ffeb913 | 403 | tok = cpp_get_token_with_location (parse_in, loc); |
5ffeb913 TT |
404 | type = tok->type; |
405 | ||
406 | retry_after_at: | |
51e63e60 | 407 | switch (type) |
0e5921e8 | 408 | { |
51e63e60 NS |
409 | case CPP_PADDING: |
410 | goto retry; | |
c22cacf3 | 411 | |
0e5921e8 | 412 | case CPP_NAME: |
9a0c6187 | 413 | *value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node.node)); |
0e5921e8 | 414 | break; |
fbb18613 | 415 | |
0e5921e8 | 416 | case CPP_NUMBER: |
ceeedfc1 | 417 | { |
3ce4f9e4 | 418 | const char *suffix = NULL; |
0b2c4be5 | 419 | unsigned int flags = cpp_classify_number (parse_in, tok, &suffix, *loc); |
ceeedfc1 NB |
420 | |
421 | switch (flags & CPP_N_CATEGORY) | |
422 | { | |
423 | case CPP_N_INVALID: | |
424 | /* cpplib has issued an error. */ | |
e8f2b18d | 425 | *value = error_mark_node; |
ceeedfc1 NB |
426 | break; |
427 | ||
428 | case CPP_N_INTEGER: | |
ab84748a VR |
429 | /* C++ uses '0' to mark virtual functions as pure. |
430 | Set PURE_ZERO to pass this information to the C++ parser. */ | |
431 | if (tok->val.str.len == 1 && *tok->val.str.text == '0') | |
432 | add_flags = PURE_ZERO; | |
2d7aa578 | 433 | *value = interpret_integer (tok, flags, &overflow); |
ceeedfc1 NB |
434 | break; |
435 | ||
436 | case CPP_N_FLOATING: | |
2d7aa578 | 437 | *value = interpret_float (tok, flags, suffix, &overflow); |
ceeedfc1 NB |
438 | break; |
439 | ||
440 | default: | |
366de0ce | 441 | gcc_unreachable (); |
ceeedfc1 | 442 | } |
3ce4f9e4 ESR |
443 | |
444 | if (flags & CPP_N_USERDEF) | |
445 | { | |
573ac65e WB |
446 | char *str; |
447 | tree literal; | |
3ce4f9e4 ESR |
448 | tree suffix_id = get_identifier (suffix); |
449 | int len = tok->val.str.len - strlen (suffix); | |
1ca3916f JM |
450 | /* If this is going to be used as a C string to pass to a |
451 | raw literal operator, we need to add a trailing NUL. */ | |
3ce4f9e4 ESR |
452 | tree num_string = build_string (len + 1, |
453 | (const char *) tok->val.str.text); | |
454 | TREE_TYPE (num_string) = char_array_type_node; | |
455 | num_string = fix_string_type (num_string); | |
573ac65e | 456 | str = CONST_CAST (char *, TREE_STRING_POINTER (num_string)); |
3ce4f9e4 | 457 | str[len] = '\0'; |
2d7aa578 ESR |
458 | literal = build_userdef_literal (suffix_id, *value, overflow, |
459 | num_string); | |
3ce4f9e4 ESR |
460 | *value = literal; |
461 | } | |
ceeedfc1 | 462 | } |
0e5921e8 | 463 | break; |
93868d11 | 464 | |
e6cc3a24 ZW |
465 | case CPP_ATSIGN: |
466 | /* An @ may give the next token special significance in Objective-C. */ | |
e6cc3a24 ZW |
467 | if (c_dialect_objc ()) |
468 | { | |
5ffeb913 TT |
469 | location_t atloc = *loc; |
470 | location_t newloc; | |
c22cacf3 | 471 | |
51e63e60 | 472 | retry_at: |
5ffeb913 | 473 | tok = cpp_get_token_with_location (parse_in, &newloc); |
51e63e60 NS |
474 | type = tok->type; |
475 | switch (type) | |
e6cc3a24 | 476 | { |
51e63e60 NS |
477 | case CPP_PADDING: |
478 | goto retry_at; | |
c22cacf3 | 479 | |
51e63e60 NS |
480 | case CPP_STRING: |
481 | case CPP_WSTRING: | |
b6baa67d KVH |
482 | case CPP_STRING16: |
483 | case CPP_STRING32: | |
2c6e3f55 | 484 | case CPP_UTF8STRING: |
46c2514e | 485 | type = lex_string (tok, value, true, true); |
51e63e60 NS |
486 | break; |
487 | ||
e6cc3a24 | 488 | case CPP_NAME: |
9a0c6187 | 489 | *value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node.node)); |
1973201f NP |
490 | if (OBJC_IS_AT_KEYWORD (C_RID_CODE (*value)) |
491 | || OBJC_IS_CXX_KEYWORD (C_RID_CODE (*value))) | |
e6cc3a24 | 492 | { |
51e63e60 | 493 | type = CPP_AT_NAME; |
49b91f05 NP |
494 | /* Note the complication: if we found an OBJC_CXX |
495 | keyword, for example, 'class', we will be | |
496 | returning a token of type CPP_AT_NAME and rid | |
497 | code RID_CLASS (not RID_AT_CLASS). The language | |
498 | parser needs to convert that to RID_AT_CLASS. | |
499 | */ | |
51e63e60 | 500 | break; |
e6cc3a24 | 501 | } |
51e63e60 | 502 | /* FALLTHROUGH */ |
e6cc3a24 | 503 | |
51e63e60 NS |
504 | default: |
505 | /* ... or not. */ | |
fab922b1 | 506 | error_at (atloc, "stray %<@%> in program"); |
5ffeb913 | 507 | *loc = newloc; |
51e63e60 | 508 | goto retry_after_at; |
e6cc3a24 | 509 | } |
51e63e60 | 510 | break; |
e6cc3a24 ZW |
511 | } |
512 | ||
51e63e60 NS |
513 | /* FALLTHROUGH */ |
514 | case CPP_HASH: | |
515 | case CPP_PASTE: | |
516 | { | |
065312cf | 517 | unsigned char name[8]; |
c22cacf3 | 518 | |
47e20491 | 519 | *cpp_spell_token (parse_in, tok, name, true) = 0; |
c22cacf3 | 520 | |
0b2c4be5 | 521 | error_at (*loc, "stray %qs in program", name); |
51e63e60 | 522 | } |
c22cacf3 | 523 | |
51e63e60 | 524 | goto retry; |
e6cc3a24 | 525 | |
6338b358 NB |
526 | case CPP_OTHER: |
527 | { | |
528 | cppchar_t c = tok->val.str.text[0]; | |
529 | ||
530 | if (c == '"' || c == '\'') | |
584a7c46 | 531 | error_at (*loc, "missing terminating %c character", (int) c); |
6338b358 | 532 | else if (ISGRAPH (c)) |
584a7c46 | 533 | error_at (*loc, "stray %qc in program", (int) c); |
6338b358 | 534 | else |
584a7c46 | 535 | error_at (*loc, "stray %<\\%o%> in program", (int) c); |
6338b358 NB |
536 | } |
537 | goto retry; | |
538 | ||
3ce4f9e4 ESR |
539 | case CPP_CHAR_USERDEF: |
540 | case CPP_WCHAR_USERDEF: | |
541 | case CPP_CHAR16_USERDEF: | |
542 | case CPP_CHAR32_USERDEF: | |
fe95b036 | 543 | case CPP_UTF8CHAR_USERDEF: |
3ce4f9e4 ESR |
544 | { |
545 | tree literal; | |
546 | cpp_token temp_tok = *tok; | |
547 | const char *suffix = cpp_get_userdef_suffix (tok); | |
548 | temp_tok.val.str.len -= strlen (suffix); | |
549 | temp_tok.type = cpp_userdef_char_remove_type (type); | |
550 | literal = build_userdef_literal (get_identifier (suffix), | |
2d7aa578 ESR |
551 | lex_charconst (&temp_tok), |
552 | OT_NONE, NULL_TREE); | |
3ce4f9e4 ESR |
553 | *value = literal; |
554 | } | |
555 | break; | |
556 | ||
0e5921e8 ZW |
557 | case CPP_CHAR: |
558 | case CPP_WCHAR: | |
b6baa67d KVH |
559 | case CPP_CHAR16: |
560 | case CPP_CHAR32: | |
fe95b036 | 561 | case CPP_UTF8CHAR: |
4ed5bcfb | 562 | *value = lex_charconst (tok); |
0e5921e8 | 563 | break; |
fbb18613 | 564 | |
3ce4f9e4 ESR |
565 | case CPP_STRING_USERDEF: |
566 | case CPP_WSTRING_USERDEF: | |
567 | case CPP_STRING16_USERDEF: | |
568 | case CPP_STRING32_USERDEF: | |
569 | case CPP_UTF8STRING_USERDEF: | |
570 | { | |
571 | tree literal, string; | |
572 | const char *suffix = cpp_get_userdef_suffix (tok); | |
573 | string = build_string (tok->val.str.len - strlen (suffix), | |
574 | (const char *) tok->val.str.text); | |
575 | literal = build_userdef_literal (get_identifier (suffix), | |
2d7aa578 | 576 | string, OT_NONE, NULL_TREE); |
3ce4f9e4 ESR |
577 | *value = literal; |
578 | } | |
579 | break; | |
580 | ||
0e5921e8 ZW |
581 | case CPP_STRING: |
582 | case CPP_WSTRING: | |
b6baa67d KVH |
583 | case CPP_STRING16: |
584 | case CPP_STRING32: | |
2c6e3f55 JJ |
585 | case CPP_UTF8STRING: |
586 | if ((lex_flags & C_LEX_STRING_NO_JOIN) == 0) | |
51e63e60 | 587 | { |
46c2514e TT |
588 | type = lex_string (tok, value, false, |
589 | (lex_flags & C_LEX_STRING_NO_TRANSLATE) == 0); | |
51e63e60 NS |
590 | break; |
591 | } | |
5f754896 | 592 | *value = build_string (tok->val.str.len, (const char *) tok->val.str.text); |
bc4071dd | 593 | break; |
b8698a0f | 594 | |
c162c75e | 595 | case CPP_PRAGMA: |
c62c040f | 596 | *value = build_int_cst (integer_type_node, tok->val.pragma); |
0e5921e8 | 597 | break; |
fbb18613 | 598 | |
0e5921e8 ZW |
599 | /* These tokens should not be visible outside cpplib. */ |
600 | case CPP_HEADER_NAME: | |
0e5921e8 | 601 | case CPP_MACRO_ARG: |
366de0ce | 602 | gcc_unreachable (); |
0e5921e8 | 603 | |
7bad794a JJ |
604 | /* CPP_COMMENT will appear when compiling with -C. Ignore, except |
605 | when it is a FALLTHROUGH comment, in that case set | |
606 | PREV_FALLTHROUGH flag on the next non-comment token. */ | |
607 | case CPP_COMMENT: | |
608 | if (tok->flags & PREV_FALLTHROUGH) | |
609 | { | |
610 | do | |
611 | { | |
612 | tok = cpp_get_token_with_location (parse_in, loc); | |
613 | type = tok->type; | |
614 | } | |
615 | while (type == CPP_PADDING || type == CPP_COMMENT); | |
616 | add_flags |= PREV_FALLTHROUGH; | |
617 | goto retry_after_at; | |
618 | } | |
9cc54940 AC |
619 | goto retry; |
620 | ||
e6cc3a24 ZW |
621 | default: |
622 | *value = NULL_TREE; | |
623 | break; | |
0e5921e8 ZW |
624 | } |
625 | ||
51e63e60 | 626 | if (cpp_flags) |
ab84748a | 627 | *cpp_flags = tok->flags | add_flags; |
51e63e60 | 628 | |
3f75a254 | 629 | if (!no_more_pch) |
18c81520 GK |
630 | { |
631 | no_more_pch = true; | |
632 | c_common_no_more_pch (); | |
633 | } | |
c22cacf3 | 634 | |
51e63e60 | 635 | timevar_pop (TV_CPP); |
c22cacf3 | 636 | |
51e63e60 | 637 | return type; |
0e5921e8 | 638 | } |
8d9bfdc5 | 639 | |
ceeedfc1 | 640 | /* Returns the narrowest C-visible unsigned type, starting with the |
5e9754af | 641 | minimum specified by FLAGS, that can fit HIGH:LOW, or itk_none if |
ceeedfc1 | 642 | there isn't one. */ |
5e9754af | 643 | |
ceeedfc1 | 644 | static enum integer_type_kind |
807e902e | 645 | narrowest_unsigned_type (const widest_int &val, unsigned int flags) |
0e5921e8 | 646 | { |
d75d71e0 | 647 | int itk; |
56f48ce9 | 648 | |
ceeedfc1 NB |
649 | if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) |
650 | itk = itk_unsigned_int; | |
651 | else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM) | |
652 | itk = itk_unsigned_long; | |
653 | else | |
654 | itk = itk_unsigned_long_long; | |
e8bbfc4e | 655 | |
ceeedfc1 | 656 | for (; itk < itk_none; itk += 2 /* skip unsigned types */) |
5e9754af | 657 | { |
64c31785 KT |
658 | tree upper; |
659 | ||
660 | if (integer_types[itk] == NULL_TREE) | |
661 | continue; | |
662 | upper = TYPE_MAX_VALUE (integer_types[itk]); | |
5e9754af | 663 | |
807e902e | 664 | if (wi::geu_p (wi::to_widest (upper), val)) |
d75d71e0 | 665 | return (enum integer_type_kind) itk; |
5e9754af | 666 | } |
56f48ce9 | 667 | |
ceeedfc1 NB |
668 | return itk_none; |
669 | } | |
e8bbfc4e | 670 | |
ceeedfc1 NB |
671 | /* Ditto, but narrowest signed type. */ |
672 | static enum integer_type_kind | |
807e902e | 673 | narrowest_signed_type (const widest_int &val, unsigned int flags) |
ceeedfc1 | 674 | { |
d75d71e0 | 675 | int itk; |
e8bbfc4e | 676 | |
ceeedfc1 NB |
677 | if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) |
678 | itk = itk_int; | |
679 | else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM) | |
680 | itk = itk_long; | |
681 | else | |
682 | itk = itk_long_long; | |
e8bbfc4e | 683 | |
ceeedfc1 | 684 | for (; itk < itk_none; itk += 2 /* skip signed types */) |
5e9754af | 685 | { |
64c31785 KT |
686 | tree upper; |
687 | ||
688 | if (integer_types[itk] == NULL_TREE) | |
689 | continue; | |
690 | upper = TYPE_MAX_VALUE (integer_types[itk]); | |
c22cacf3 | 691 | |
807e902e | 692 | if (wi::geu_p (wi::to_widest (upper), val)) |
d75d71e0 | 693 | return (enum integer_type_kind) itk; |
5e9754af | 694 | } |
15e5ad76 | 695 | |
ceeedfc1 NB |
696 | return itk_none; |
697 | } | |
15e5ad76 | 698 | |
ceeedfc1 NB |
699 | /* Interpret TOKEN, an integer with FLAGS as classified by cpplib. */ |
700 | static tree | |
2d7aa578 ESR |
701 | interpret_integer (const cpp_token *token, unsigned int flags, |
702 | enum overflow_type *overflow) | |
ceeedfc1 NB |
703 | { |
704 | tree value, type; | |
705 | enum integer_type_kind itk; | |
706 | cpp_num integer; | |
807e902e | 707 | HOST_WIDE_INT ival[3]; |
ceeedfc1 | 708 | |
2d7aa578 ESR |
709 | *overflow = OT_NONE; |
710 | ||
ceeedfc1 | 711 | integer = cpp_interpret_integer (parse_in, token, flags); |
2d7aa578 ESR |
712 | if (integer.overflow) |
713 | *overflow = OT_OVERFLOW; | |
ceeedfc1 | 714 | |
807e902e KZ |
715 | ival[0] = integer.low; |
716 | ival[1] = integer.high; | |
717 | ival[2] = 0; | |
718 | widest_int wval = widest_int::from_array (ival, 3); | |
719 | ||
ceeedfc1 NB |
720 | /* The type of a constant with a U suffix is straightforward. */ |
721 | if (flags & CPP_N_UNSIGNED) | |
807e902e | 722 | itk = narrowest_unsigned_type (wval, flags); |
0e5921e8 ZW |
723 | else |
724 | { | |
ceeedfc1 NB |
725 | /* The type of a potentially-signed integer constant varies |
726 | depending on the base it's in, the standard in use, and the | |
727 | length suffixes. */ | |
5e9754af | 728 | enum integer_type_kind itk_u |
807e902e | 729 | = narrowest_unsigned_type (wval, flags); |
5e9754af | 730 | enum integer_type_kind itk_s |
807e902e | 731 | = narrowest_signed_type (wval, flags); |
ceeedfc1 NB |
732 | |
733 | /* In both C89 and C99, octal and hex constants may be signed or | |
734 | unsigned, whichever fits tighter. We do not warn about this | |
735 | choice differing from the traditional choice, as the constant | |
736 | is probably a bit pattern and either way will work. */ | |
737 | if ((flags & CPP_N_RADIX) != CPP_N_DECIMAL) | |
738 | itk = MIN (itk_u, itk_s); | |
739 | else | |
0e5921e8 | 740 | { |
ceeedfc1 NB |
741 | /* In C99, decimal constants are always signed. |
742 | In C89, decimal constants that don't fit in long have | |
8d9afc4e | 743 | undefined behavior; we try to make them unsigned long. |
ceeedfc1 NB |
744 | In GCC's extended C89, that last is true of decimal |
745 | constants that don't fit in long long, too. */ | |
746 | ||
747 | itk = itk_s; | |
748 | if (itk_s > itk_u && itk_s > itk_long) | |
0e5921e8 | 749 | { |
ceeedfc1 | 750 | if (!flag_isoc99) |
0e5921e8 | 751 | { |
ceeedfc1 NB |
752 | if (itk_u < itk_unsigned_long) |
753 | itk_u = itk_unsigned_long; | |
754 | itk = itk_u; | |
d4ee4d25 | 755 | warning (0, "this decimal constant is unsigned only in ISO C90"); |
0e5921e8 | 756 | } |
44c21c7f DD |
757 | else |
758 | warning (OPT_Wtraditional, | |
759 | "this decimal constant would be unsigned in ISO C90"); | |
0e5921e8 ZW |
760 | } |
761 | } | |
ceeedfc1 | 762 | } |
56f48ce9 | 763 | |
ceeedfc1 NB |
764 | if (itk == itk_none) |
765 | /* cpplib has already issued a warning for overflow. */ | |
766 | type = ((flags & CPP_N_UNSIGNED) | |
767 | ? widest_unsigned_literal_type_node | |
768 | : widest_integer_literal_type_node); | |
769 | else | |
9c650d90 MLI |
770 | { |
771 | type = integer_types[itk]; | |
772 | if (itk > itk_unsigned_long | |
773 | && (flags & CPP_N_WIDTH) != CPP_N_LARGE) | |
b8698a0f | 774 | emit_diagnostic |
9c650d90 MLI |
775 | ((c_dialect_cxx () ? cxx_dialect == cxx98 : !flag_isoc99) |
776 | ? DK_PEDWARN : DK_WARNING, | |
777 | input_location, OPT_Wlong_long, | |
b8698a0f | 778 | (flags & CPP_N_UNSIGNED) |
9c650d90 MLI |
779 | ? "integer constant is too large for %<unsigned long%> type" |
780 | : "integer constant is too large for %<long%> type"); | |
781 | } | |
0468bc75 | 782 | |
807e902e | 783 | value = wide_int_to_tree (type, wval); |
e8bbfc4e | 784 | |
ceeedfc1 NB |
785 | /* Convert imaginary to a complex type. */ |
786 | if (flags & CPP_N_IMAGINARY) | |
7d60be94 | 787 | value = build_complex (NULL_TREE, build_int_cst (type, 0), value); |
e8bbfc4e | 788 | |
ceeedfc1 NB |
789 | return value; |
790 | } | |
e8bbfc4e | 791 | |
ceeedfc1 | 792 | /* Interpret TOKEN, a floating point number with FLAGS as classified |
36a85135 | 793 | by cpplib. For C++11 SUFFIX may contain a user-defined literal suffix. */ |
ceeedfc1 | 794 | static tree |
3ce4f9e4 | 795 | interpret_float (const cpp_token *token, unsigned int flags, |
2d7aa578 | 796 | const char *suffix, enum overflow_type *overflow) |
ceeedfc1 NB |
797 | { |
798 | tree type; | |
8ce94e44 | 799 | tree const_type; |
ceeedfc1 NB |
800 | tree value; |
801 | REAL_VALUE_TYPE real; | |
8ce94e44 | 802 | REAL_VALUE_TYPE real_trunc; |
ceeedfc1 NB |
803 | char *copy; |
804 | size_t copylen; | |
e8bbfc4e | 805 | |
2d7aa578 ESR |
806 | *overflow = OT_NONE; |
807 | ||
6ec637a4 JJ |
808 | /* Default (no suffix) depends on whether the FLOAT_CONST_DECIMAL64 |
809 | pragma has been used and is either double or _Decimal64. Types | |
810 | that are not allowed with decimal float default to double. */ | |
839a3b8a JJ |
811 | if (flags & CPP_N_DEFAULT) |
812 | { | |
813 | flags ^= CPP_N_DEFAULT; | |
814 | flags |= CPP_N_MEDIUM; | |
6ec637a4 JJ |
815 | |
816 | if (((flags & CPP_N_HEX) == 0) && ((flags & CPP_N_IMAGINARY) == 0)) | |
817 | { | |
818 | warning (OPT_Wunsuffixed_float_constants, | |
819 | "unsuffixed float constant"); | |
820 | if (float_const_decimal64_p ()) | |
821 | flags |= CPP_N_DFLOAT; | |
822 | } | |
839a3b8a JJ |
823 | } |
824 | ||
14c931f1 CF |
825 | /* Decode _Fract and _Accum. */ |
826 | if (flags & CPP_N_FRACT || flags & CPP_N_ACCUM) | |
827 | return interpret_fixed (token, flags); | |
828 | ||
9a8ce21f JG |
829 | /* Decode type based on width and properties. */ |
830 | if (flags & CPP_N_DFLOAT) | |
831 | if ((flags & CPP_N_WIDTH) == CPP_N_LARGE) | |
832 | type = dfloat128_type_node; | |
833 | else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) | |
834 | type = dfloat32_type_node; | |
835 | else | |
836 | type = dfloat64_type_node; | |
837 | else | |
c77cd3d1 UB |
838 | if (flags & CPP_N_WIDTH_MD) |
839 | { | |
840 | char suffix; | |
ef4bddc2 | 841 | machine_mode mode; |
c77cd3d1 UB |
842 | |
843 | if ((flags & CPP_N_WIDTH_MD) == CPP_N_MD_W) | |
844 | suffix = 'w'; | |
845 | else | |
846 | suffix = 'q'; | |
847 | ||
848 | mode = targetm.c.mode_for_suffix (suffix); | |
849 | if (mode == VOIDmode) | |
850 | { | |
851 | error ("unsupported non-standard suffix on floating constant"); | |
c77cd3d1 UB |
852 | |
853 | return error_mark_node; | |
854 | } | |
fcf73884 | 855 | else |
c1771a20 | 856 | pedwarn (input_location, OPT_Wpedantic, "non-standard suffix on floating constant"); |
c77cd3d1 UB |
857 | |
858 | type = c_common_type_for_mode (mode, 0); | |
859 | gcc_assert (type); | |
860 | } | |
c65699ef JM |
861 | else if ((flags & (CPP_N_FLOATN | CPP_N_FLOATNX)) != 0) |
862 | { | |
863 | unsigned int n = (flags & CPP_N_WIDTH_FLOATN_NX) >> CPP_FLOATN_SHIFT; | |
864 | bool extended = (flags & CPP_N_FLOATNX) != 0; | |
865 | type = NULL_TREE; | |
866 | for (int i = 0; i < NUM_FLOATN_NX_TYPES; i++) | |
867 | if (floatn_nx_types[i].n == (int) n | |
868 | && floatn_nx_types[i].extended == extended) | |
869 | { | |
870 | type = FLOATN_NX_TYPE_NODE (i); | |
871 | break; | |
872 | } | |
873 | if (type == NULL_TREE) | |
874 | { | |
875 | error ("unsupported non-standard suffix on floating constant"); | |
876 | return error_mark_node; | |
877 | } | |
878 | else | |
879 | pedwarn (input_location, OPT_Wpedantic, "non-standard suffix on floating constant"); | |
880 | } | |
c77cd3d1 | 881 | else if ((flags & CPP_N_WIDTH) == CPP_N_LARGE) |
ceeedfc1 | 882 | type = long_double_type_node; |
9a8ce21f JG |
883 | else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL |
884 | || flag_single_precision_constant) | |
ceeedfc1 | 885 | type = float_type_node; |
9a8ce21f | 886 | else |
ceeedfc1 | 887 | type = double_type_node; |
e8bbfc4e | 888 | |
8ce94e44 JM |
889 | const_type = excess_precision_type (type); |
890 | if (!const_type) | |
891 | const_type = type; | |
892 | ||
ceeedfc1 NB |
893 | /* Copy the constant to a nul-terminated buffer. If the constant |
894 | has any suffixes, cut them off; REAL_VALUE_ATOF/ REAL_VALUE_HTOF | |
895 | can't handle them. */ | |
896 | copylen = token->val.str.len; | |
3ce4f9e4 ESR |
897 | if (flags & CPP_N_USERDEF) |
898 | copylen -= strlen (suffix); | |
899 | else if (flags & CPP_N_DFLOAT) | |
9a8ce21f | 900 | copylen -= 2; |
b8698a0f | 901 | else |
9a8ce21f JG |
902 | { |
903 | if ((flags & CPP_N_WIDTH) != CPP_N_MEDIUM) | |
c77cd3d1 | 904 | /* Must be an F or L or machine defined suffix. */ |
9a8ce21f JG |
905 | copylen--; |
906 | if (flags & CPP_N_IMAGINARY) | |
907 | /* I or J suffix. */ | |
908 | copylen--; | |
c65699ef JM |
909 | if (flags & CPP_N_FLOATNX) |
910 | copylen--; | |
911 | if (flags & (CPP_N_FLOATN | CPP_N_FLOATNX)) | |
912 | { | |
913 | unsigned int n = (flags & CPP_N_WIDTH_FLOATN_NX) >> CPP_FLOATN_SHIFT; | |
914 | while (n > 0) | |
915 | { | |
916 | copylen--; | |
917 | n /= 10; | |
918 | } | |
919 | } | |
9a8ce21f | 920 | } |
ceeedfc1 | 921 | |
28dab132 | 922 | copy = (char *) alloca (copylen + 1); |
7057e645 ESR |
923 | if (cxx_dialect > cxx11) |
924 | { | |
925 | size_t maxlen = 0; | |
926 | for (size_t i = 0; i < copylen; ++i) | |
927 | if (token->val.str.text[i] != '\'') | |
928 | copy[maxlen++] = token->val.str.text[i]; | |
929 | copy[maxlen] = '\0'; | |
930 | } | |
931 | else | |
932 | { | |
933 | memcpy (copy, token->val.str.text, copylen); | |
934 | copy[copylen] = '\0'; | |
935 | } | |
ceeedfc1 | 936 | |
8ce94e44 JM |
937 | real_from_string3 (&real, copy, TYPE_MODE (const_type)); |
938 | if (const_type != type) | |
939 | /* Diagnosing if the result of converting the value with excess | |
940 | precision to the semantic type would overflow (with associated | |
941 | double rounding) is more appropriate than diagnosing if the | |
942 | result of converting the string directly to the semantic type | |
943 | would overflow. */ | |
944 | real_convert (&real_trunc, TYPE_MODE (type), &real); | |
fbb18613 | 945 | |
6d84156b JM |
946 | /* Both C and C++ require a diagnostic for a floating constant |
947 | outside the range of representable values of its type. Since we | |
92ef5cf9 MLI |
948 | have __builtin_inf* to produce an infinity, this is now a |
949 | mandatory pedwarn if the target does not support infinities. */ | |
8ce94e44 JM |
950 | if (REAL_VALUE_ISINF (real) |
951 | || (const_type != type && REAL_VALUE_ISINF (real_trunc))) | |
92ef5cf9 | 952 | { |
2d7aa578 ESR |
953 | *overflow = OT_OVERFLOW; |
954 | if (!(flags & CPP_N_USERDEF)) | |
955 | { | |
956 | if (!MODE_HAS_INFINITIES (TYPE_MODE (type))) | |
957 | pedwarn (input_location, 0, | |
958 | "floating constant exceeds range of %qT", type); | |
959 | else | |
960 | warning (OPT_Woverflow, | |
961 | "floating constant exceeds range of %qT", type); | |
962 | } | |
92ef5cf9 MLI |
963 | } |
964 | /* We also give a warning if the value underflows. */ | |
624d31fe | 965 | else if (real_equal (&real, &dconst0) |
2d7aa578 | 966 | || (const_type != type |
624d31fe | 967 | && real_equal (&real_trunc, &dconst0))) |
92ef5cf9 MLI |
968 | { |
969 | REAL_VALUE_TYPE realvoidmode; | |
2d7aa578 ESR |
970 | int oflow = real_from_string (&realvoidmode, copy); |
971 | *overflow = (oflow == 0 ? OT_NONE | |
972 | : (oflow < 0 ? OT_UNDERFLOW : OT_OVERFLOW)); | |
973 | if (!(flags & CPP_N_USERDEF)) | |
974 | { | |
624d31fe | 975 | if (oflow < 0 || !real_equal (&realvoidmode, &dconst0)) |
2d7aa578 ESR |
976 | warning (OPT_Woverflow, "floating constant truncated to zero"); |
977 | } | |
92ef5cf9 | 978 | } |
fbb18613 | 979 | |
ceeedfc1 | 980 | /* Create a node with determined type and value. */ |
8ce94e44 | 981 | value = build_real (const_type, real); |
ceeedfc1 | 982 | if (flags & CPP_N_IMAGINARY) |
7273813a | 983 | { |
269e63b7 KT |
984 | value = build_complex (NULL_TREE, |
985 | fold_convert (const_type, | |
986 | integer_zero_node), value); | |
7273813a JJ |
987 | if (type != const_type) |
988 | { | |
989 | const_type = TREE_TYPE (value); | |
990 | type = build_complex_type (type); | |
991 | } | |
992 | } | |
8ce94e44 JM |
993 | |
994 | if (type != const_type) | |
14e18d71 | 995 | value = build1_loc (token->src_loc, EXCESS_PRECISION_EXPR, type, value); |
e8bbfc4e | 996 | |
0e5921e8 | 997 | return value; |
0e5921e8 | 998 | } |
e8bbfc4e | 999 | |
14c931f1 CF |
1000 | /* Interpret TOKEN, a fixed-point number with FLAGS as classified |
1001 | by cpplib. */ | |
1002 | ||
1003 | static tree | |
1004 | interpret_fixed (const cpp_token *token, unsigned int flags) | |
1005 | { | |
1006 | tree type; | |
1007 | tree value; | |
1008 | FIXED_VALUE_TYPE fixed; | |
1009 | char *copy; | |
1010 | size_t copylen; | |
1011 | ||
1012 | copylen = token->val.str.len; | |
1013 | ||
1014 | if (flags & CPP_N_FRACT) /* _Fract. */ | |
1015 | { | |
1016 | if (flags & CPP_N_UNSIGNED) /* Unsigned _Fract. */ | |
1017 | { | |
1018 | if ((flags & CPP_N_WIDTH) == CPP_N_LARGE) | |
1019 | { | |
1020 | type = unsigned_long_long_fract_type_node; | |
1021 | copylen -= 4; | |
1022 | } | |
1023 | else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM) | |
1024 | { | |
1025 | type = unsigned_long_fract_type_node; | |
1026 | copylen -= 3; | |
1027 | } | |
1028 | else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) | |
1029 | { | |
1030 | type = unsigned_short_fract_type_node; | |
1031 | copylen -= 3; | |
1032 | } | |
1033 | else | |
1034 | { | |
1035 | type = unsigned_fract_type_node; | |
1036 | copylen -= 2; | |
1037 | } | |
1038 | } | |
1039 | else /* Signed _Fract. */ | |
1040 | { | |
1041 | if ((flags & CPP_N_WIDTH) == CPP_N_LARGE) | |
1042 | { | |
1043 | type = long_long_fract_type_node; | |
1044 | copylen -= 3; | |
1045 | } | |
1046 | else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM) | |
1047 | { | |
1048 | type = long_fract_type_node; | |
1049 | copylen -= 2; | |
1050 | } | |
1051 | else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) | |
1052 | { | |
1053 | type = short_fract_type_node; | |
1054 | copylen -= 2; | |
1055 | } | |
1056 | else | |
1057 | { | |
1058 | type = fract_type_node; | |
1059 | copylen --; | |
1060 | } | |
1061 | } | |
1062 | } | |
1063 | else /* _Accum. */ | |
1064 | { | |
1065 | if (flags & CPP_N_UNSIGNED) /* Unsigned _Accum. */ | |
1066 | { | |
1067 | if ((flags & CPP_N_WIDTH) == CPP_N_LARGE) | |
1068 | { | |
1069 | type = unsigned_long_long_accum_type_node; | |
1070 | copylen -= 4; | |
1071 | } | |
1072 | else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM) | |
1073 | { | |
1074 | type = unsigned_long_accum_type_node; | |
1075 | copylen -= 3; | |
1076 | } | |
1077 | else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) | |
1078 | { | |
1079 | type = unsigned_short_accum_type_node; | |
1080 | copylen -= 3; | |
1081 | } | |
1082 | else | |
1083 | { | |
1084 | type = unsigned_accum_type_node; | |
1085 | copylen -= 2; | |
1086 | } | |
1087 | } | |
1088 | else /* Signed _Accum. */ | |
1089 | { | |
1090 | if ((flags & CPP_N_WIDTH) == CPP_N_LARGE) | |
1091 | { | |
1092 | type = long_long_accum_type_node; | |
1093 | copylen -= 3; | |
1094 | } | |
1095 | else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM) | |
1096 | { | |
1097 | type = long_accum_type_node; | |
1098 | copylen -= 2; | |
1099 | } | |
1100 | else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) | |
1101 | { | |
1102 | type = short_accum_type_node; | |
1103 | copylen -= 2; | |
1104 | } | |
1105 | else | |
1106 | { | |
1107 | type = accum_type_node; | |
1108 | copylen --; | |
1109 | } | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | copy = (char *) alloca (copylen + 1); | |
1114 | memcpy (copy, token->val.str.text, copylen); | |
1115 | copy[copylen] = '\0'; | |
1116 | ||
b397965c | 1117 | fixed_from_string (&fixed, copy, SCALAR_TYPE_MODE (type)); |
14c931f1 CF |
1118 | |
1119 | /* Create a node with determined type and value. */ | |
1120 | value = build_fixed (type, fixed); | |
1121 | ||
1122 | return value; | |
1123 | } | |
1124 | ||
2c6e3f55 JJ |
1125 | /* Convert a series of STRING, WSTRING, STRING16, STRING32 and/or |
1126 | UTF8STRING tokens into a tree, performing string constant | |
a9546771 NP |
1127 | concatenation. TOK is the first of these. VALP is the location to |
1128 | write the string into. OBJC_STRING indicates whether an '@' token | |
1129 | preceded the incoming token (in that case, the strings can either | |
1130 | be ObjC strings, preceded by a single '@', or normal strings, not | |
1131 | preceded by '@'. The result will be a CPP_OBJC_STRING). Returns | |
1132 | the CPP token type of the result (CPP_STRING, CPP_WSTRING, | |
2c6e3f55 | 1133 | CPP_STRING32, CPP_STRING16, CPP_UTF8STRING, or CPP_OBJC_STRING). |
e6cc3a24 ZW |
1134 | |
1135 | This is unfortunately more work than it should be. If any of the | |
1136 | strings in the series has an L prefix, the result is a wide string | |
1137 | (6.4.5p4). Whether or not the result is a wide string affects the | |
1138 | meaning of octal and hexadecimal escapes (6.4.4.4p6,9). But escape | |
1139 | sequences do not continue across the boundary between two strings in | |
1140 | a series (6.4.5p7), so we must not lose the boundaries. Therefore | |
1141 | cpp_interpret_string takes a vector of cpp_string structures, which | |
1142 | we must arrange to provide. */ | |
1143 | ||
1144 | static enum cpp_ttype | |
46c2514e | 1145 | lex_string (const cpp_token *tok, tree *valp, bool objc_string, bool translate) |
0e5921e8 ZW |
1146 | { |
1147 | tree value; | |
51e63e60 | 1148 | size_t concats = 0; |
e6cc3a24 | 1149 | struct obstack str_ob; |
88fa5555 | 1150 | struct obstack loc_ob; |
e6cc3a24 | 1151 | cpp_string istr; |
b6baa67d | 1152 | enum cpp_ttype type = tok->type; |
2f6e4e97 | 1153 | |
e6cc3a24 ZW |
1154 | /* Try to avoid the overhead of creating and destroying an obstack |
1155 | for the common case of just one string. */ | |
1156 | cpp_string str = tok->val.str; | |
88fa5555 | 1157 | location_t init_loc = tok->src_loc; |
e6cc3a24 | 1158 | cpp_string *strs = &str; |
88fa5555 | 1159 | location_t *locs = NULL; |
e9a25f70 | 1160 | |
a9546771 NP |
1161 | /* objc_at_sign_was_seen is only used when doing Objective-C string |
1162 | concatenation. It is 'true' if we have seen an '@' before the | |
1163 | current string, and 'false' if not. We must see exactly one or | |
1164 | zero '@' before each string. */ | |
1165 | bool objc_at_sign_was_seen = false; | |
1166 | ||
51e63e60 NS |
1167 | retry: |
1168 | tok = cpp_get_token (parse_in); | |
1169 | switch (tok->type) | |
e6cc3a24 | 1170 | { |
51e63e60 NS |
1171 | case CPP_PADDING: |
1172 | goto retry; | |
1173 | case CPP_ATSIGN: | |
a9546771 | 1174 | if (objc_string) |
0e5921e8 | 1175 | { |
a9546771 NP |
1176 | if (objc_at_sign_was_seen) |
1177 | error ("repeated %<@%> before Objective-C string"); | |
1178 | ||
1179 | objc_at_sign_was_seen = true; | |
51e63e60 NS |
1180 | goto retry; |
1181 | } | |
1182 | /* FALLTHROUGH */ | |
c22cacf3 | 1183 | |
51e63e60 NS |
1184 | default: |
1185 | break; | |
c22cacf3 | 1186 | |
51e63e60 | 1187 | case CPP_WSTRING: |
b6baa67d KVH |
1188 | case CPP_STRING16: |
1189 | case CPP_STRING32: | |
2c6e3f55 | 1190 | case CPP_UTF8STRING: |
b6baa67d KVH |
1191 | if (type != tok->type) |
1192 | { | |
1193 | if (type == CPP_STRING) | |
1194 | type = tok->type; | |
1195 | else | |
1196 | error ("unsupported non-standard concatenation of string literals"); | |
1197 | } | |
88fa5555 | 1198 | /* FALLTHROUGH */ |
c22cacf3 | 1199 | |
51e63e60 NS |
1200 | case CPP_STRING: |
1201 | if (!concats) | |
1202 | { | |
1203 | gcc_obstack_init (&str_ob); | |
88fa5555 | 1204 | gcc_obstack_init (&loc_ob); |
51e63e60 | 1205 | obstack_grow (&str_ob, &str, sizeof (cpp_string)); |
88fa5555 | 1206 | obstack_grow (&loc_ob, &init_loc, sizeof (location_t)); |
0e5921e8 | 1207 | } |
c22cacf3 | 1208 | |
51e63e60 NS |
1209 | concats++; |
1210 | obstack_grow (&str_ob, &tok->val.str, sizeof (cpp_string)); | |
88fa5555 DM |
1211 | obstack_grow (&loc_ob, &tok->src_loc, sizeof (location_t)); |
1212 | ||
a9546771 NP |
1213 | if (objc_string) |
1214 | objc_at_sign_was_seen = false; | |
51e63e60 | 1215 | goto retry; |
e8bbfc4e RK |
1216 | } |
1217 | ||
a9546771 NP |
1218 | /* It is an error if we saw a '@' with no following string. */ |
1219 | if (objc_at_sign_was_seen) | |
1220 | error ("stray %<@%> in program"); | |
1221 | ||
e6cc3a24 ZW |
1222 | /* We have read one more token than we want. */ |
1223 | _cpp_backup_tokens (parse_in, 1); | |
51e63e60 | 1224 | if (concats) |
88fa5555 DM |
1225 | { |
1226 | strs = XOBFINISH (&str_ob, cpp_string *); | |
1227 | locs = XOBFINISH (&loc_ob, location_t *); | |
1228 | } | |
e6cc3a24 | 1229 | |
8400e75e | 1230 | if (concats && !objc_string && !in_system_header_at (input_location)) |
44c21c7f DD |
1231 | warning (OPT_Wtraditional, |
1232 | "traditional C rejects string constant concatenation"); | |
e8bbfc4e | 1233 | |
46c2514e | 1234 | if ((translate |
21526606 | 1235 | ? cpp_interpret_string : cpp_interpret_string_notranslate) |
b6baa67d | 1236 | (parse_in, strs, concats + 1, &istr, type)) |
0e5921e8 | 1237 | { |
5f754896 | 1238 | value = build_string (istr.len, (const char *) istr.text); |
b1d5455a | 1239 | free (CONST_CAST (unsigned char *, istr.text)); |
88fa5555 DM |
1240 | if (concats) |
1241 | { | |
1242 | gcc_assert (locs); | |
1243 | gcc_assert (g_string_concat_db); | |
1244 | g_string_concat_db->record_string_concatenation (concats + 1, locs); | |
1245 | } | |
0e5921e8 ZW |
1246 | } |
1247 | else | |
1248 | { | |
e6cc3a24 ZW |
1249 | /* Callers cannot generally handle error_mark_node in this context, |
1250 | so return the empty string instead. cpp_interpret_string has | |
1251 | issued an error. */ | |
b6baa67d KVH |
1252 | switch (type) |
1253 | { | |
1254 | default: | |
1255 | case CPP_STRING: | |
2c6e3f55 | 1256 | case CPP_UTF8STRING: |
b6baa67d KVH |
1257 | value = build_string (1, ""); |
1258 | break; | |
1259 | case CPP_STRING16: | |
1260 | value = build_string (TYPE_PRECISION (char16_type_node) | |
1261 | / TYPE_PRECISION (char_type_node), | |
1262 | "\0"); /* char16_t is 16 bits */ | |
1263 | break; | |
1264 | case CPP_STRING32: | |
1265 | value = build_string (TYPE_PRECISION (char32_type_node) | |
1266 | / TYPE_PRECISION (char_type_node), | |
1267 | "\0\0\0"); /* char32_t is 32 bits */ | |
1268 | break; | |
1269 | case CPP_WSTRING: | |
1270 | value = build_string (TYPE_PRECISION (wchar_type_node) | |
1271 | / TYPE_PRECISION (char_type_node), | |
1272 | "\0\0\0"); /* widest supported wchar_t | |
1273 | is 32 bits */ | |
1274 | break; | |
1275 | } | |
0e5921e8 ZW |
1276 | } |
1277 | ||
b6baa67d KVH |
1278 | switch (type) |
1279 | { | |
1280 | default: | |
1281 | case CPP_STRING: | |
2c6e3f55 | 1282 | case CPP_UTF8STRING: |
b6baa67d KVH |
1283 | TREE_TYPE (value) = char_array_type_node; |
1284 | break; | |
1285 | case CPP_STRING16: | |
1286 | TREE_TYPE (value) = char16_array_type_node; | |
1287 | break; | |
1288 | case CPP_STRING32: | |
1289 | TREE_TYPE (value) = char32_array_type_node; | |
1290 | break; | |
1291 | case CPP_WSTRING: | |
1292 | TREE_TYPE (value) = wchar_array_type_node; | |
1293 | } | |
e6cc3a24 | 1294 | *valp = fix_string_type (value); |
0e5921e8 | 1295 | |
51e63e60 | 1296 | if (concats) |
88fa5555 DM |
1297 | { |
1298 | obstack_free (&str_ob, 0); | |
1299 | obstack_free (&loc_ob, 0); | |
1300 | } | |
e6cc3a24 | 1301 | |
b6baa67d | 1302 | return objc_string ? CPP_OBJC_STRING : type; |
e8bbfc4e RK |
1303 | } |
1304 | ||
c8a96070 | 1305 | /* Converts a (possibly wide) character constant token into a tree. */ |
0e5921e8 | 1306 | static tree |
2f6e4e97 | 1307 | lex_charconst (const cpp_token *token) |
e8bbfc4e | 1308 | { |
4268e8bb | 1309 | cppchar_t result; |
9340544b | 1310 | tree type, value; |
c8a96070 | 1311 | unsigned int chars_seen; |
098b9c46 | 1312 | int unsignedp = 0; |
ceeedfc1 | 1313 | |
a5a49440 | 1314 | result = cpp_interpret_charconst (parse_in, token, |
2f6e4e97 | 1315 | &chars_seen, &unsignedp); |
9340544b | 1316 | |
4268e8bb NB |
1317 | if (token->type == CPP_WCHAR) |
1318 | type = wchar_type_node; | |
b6baa67d KVH |
1319 | else if (token->type == CPP_CHAR32) |
1320 | type = char32_type_node; | |
1321 | else if (token->type == CPP_CHAR16) | |
1322 | type = char16_type_node; | |
fe95b036 ESR |
1323 | else if (token->type == CPP_UTF8CHAR) |
1324 | type = char_type_node; | |
4268e8bb NB |
1325 | /* In C, a character constant has type 'int'. |
1326 | In C++ 'char', but multi-char charconsts have type 'int'. */ | |
37fa72e9 | 1327 | else if (!c_dialect_cxx () || chars_seen > 1) |
4268e8bb NB |
1328 | type = integer_type_node; |
1329 | else | |
1330 | type = char_type_node; | |
9340544b | 1331 | |
4a90aeeb NS |
1332 | /* Cast to cppchar_signed_t to get correct sign-extension of RESULT |
1333 | before possibly widening to HOST_WIDE_INT for build_int_cst. */ | |
1334 | if (unsignedp || (cppchar_signed_t) result >= 0) | |
807e902e | 1335 | value = build_int_cst (type, result); |
4a90aeeb | 1336 | else |
807e902e | 1337 | value = build_int_cst (type, (cppchar_signed_t) result); |
4a90aeeb | 1338 | |
0e5921e8 | 1339 | return value; |
e8bbfc4e | 1340 | } |
de67c4c3 DM |
1341 | |
1342 | /* Helper function for c_parser_peek_conflict_marker | |
1343 | and cp_lexer_peek_conflict_marker. | |
1344 | Given a possible conflict marker token of kind TOK1_KIND | |
1345 | consisting of a pair of characters, get the token kind for the | |
1346 | standalone final character. */ | |
1347 | ||
1348 | enum cpp_ttype | |
1349 | conflict_marker_get_final_tok_kind (enum cpp_ttype tok1_kind) | |
1350 | { | |
1351 | switch (tok1_kind) | |
1352 | { | |
1353 | default: gcc_unreachable (); | |
1354 | case CPP_LSHIFT: | |
1355 | /* "<<" and '<' */ | |
1356 | return CPP_LESS; | |
1357 | ||
1358 | case CPP_EQ_EQ: | |
1359 | /* "==" and '=' */ | |
1360 | return CPP_EQ; | |
1361 | ||
1362 | case CPP_RSHIFT: | |
1363 | /* ">>" and '>' */ | |
1364 | return CPP_GREATER; | |
1365 | } | |
1366 | } |