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3eb82013 | 1 | /* Mainly the interface between cpplib and the C front ends. |
0b387d23 | 2 | Copyright (C) 1987, 1988, 1989, 1992, 1994, 1995, 1996, 1997 |
9c85a98a | 3 | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008 |
b5575c30 | 4 | Free Software Foundation, Inc. |
dbb0cd11 | 5 | |
f12b58b3 | 6 | This file is part of GCC. |
dbb0cd11 | 7 | |
f12b58b3 | 8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
8c4c00c1 | 10 | Software Foundation; either version 3, or (at your option) any later |
f12b58b3 | 11 | version. |
dbb0cd11 | 12 | |
f12b58b3 | 13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
dbb0cd11 | 17 | |
18 | You should have received a copy of the GNU General Public License | |
8c4c00c1 | 19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
dbb0cd11 | 21 | |
0dbd1c74 | 22 | #include "config.h" |
405711de | 23 | #include "system.h" |
805e22b2 | 24 | #include "coretypes.h" |
25 | #include "tm.h" | |
dbb0cd11 | 26 | |
ef258422 | 27 | #include "real.h" |
dbb0cd11 | 28 | #include "rtl.h" |
29 | #include "tree.h" | |
30 | #include "input.h" | |
cd03a192 | 31 | #include "output.h" |
dbb0cd11 | 32 | #include "c-tree.h" |
b78207a0 | 33 | #include "c-common.h" |
dbb0cd11 | 34 | #include "flags.h" |
518796ad | 35 | #include "timevar.h" |
1fcd08b1 | 36 | #include "cpplib.h" |
917aa082 | 37 | #include "c-pragma.h" |
9cdfa0b0 | 38 | #include "toplev.h" |
be2828ce | 39 | #include "intl.h" |
d8c9779c | 40 | #include "tm_p.h" |
518796ad | 41 | #include "splay-tree.h" |
c140b944 | 42 | #include "debug.h" |
430be8e2 | 43 | #include "target.h" |
be2828ce | 44 | |
518796ad | 45 | /* We may keep statistics about how long which files took to compile. */ |
46 | static int header_time, body_time; | |
47 | static splay_tree file_info_tree; | |
25b48e97 | 48 | |
518796ad | 49 | int pending_lang_change; /* If we need to switch languages - C++ only */ |
50 | int c_header_level; /* depth in C headers - C++ only */ | |
3fe7c943 | 51 | |
2b30d46c | 52 | static tree interpret_integer (const cpp_token *, unsigned int); |
53 | static tree interpret_float (const cpp_token *, unsigned int); | |
b563b483 | 54 | static tree interpret_fixed (const cpp_token *, unsigned int); |
2364e487 | 55 | static enum integer_type_kind narrowest_unsigned_type |
56 | (unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT, unsigned int); | |
57 | static enum integer_type_kind narrowest_signed_type | |
58 | (unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT, unsigned int); | |
8115b8be | 59 | static enum cpp_ttype lex_string (const cpp_token *, tree *, bool, bool); |
2b30d46c | 60 | static tree lex_charconst (const cpp_token *); |
61 | static void update_header_times (const char *); | |
62 | static int dump_one_header (splay_tree_node, void *); | |
63 | static void cb_line_change (cpp_reader *, const cpp_token *, int); | |
64 | static void cb_ident (cpp_reader *, unsigned int, const cpp_string *); | |
65 | static void cb_def_pragma (cpp_reader *, unsigned int); | |
66 | static void cb_define (cpp_reader *, unsigned int, cpp_hashnode *); | |
67 | static void cb_undef (cpp_reader *, unsigned int, cpp_hashnode *); | |
c450c529 | 68 | \f |
f7070933 | 69 | void |
2b30d46c | 70 | init_c_lex (void) |
14ace7ea | 71 | { |
1a88fc96 | 72 | struct cpp_callbacks *cb; |
518796ad | 73 | struct c_fileinfo *toplevel; |
74 | ||
62bf98ad | 75 | /* The get_fileinfo data structure must be initialized before |
76 | cpp_read_main_file is called. */ | |
ec6cb94a | 77 | toplevel = get_fileinfo ("<top level>"); |
518796ad | 78 | if (flag_detailed_statistics) |
79 | { | |
80 | header_time = 0; | |
81 | body_time = get_run_time (); | |
82 | toplevel->time = body_time; | |
83 | } | |
2b30d46c | 84 | |
1a88fc96 | 85 | cb = cpp_get_callbacks (parse_in); |
86 | ||
5621a364 | 87 | cb->line_change = cb_line_change; |
1a88fc96 | 88 | cb->ident = cb_ident; |
1a88fc96 | 89 | cb->def_pragma = cb_def_pragma; |
573aba85 | 90 | cb->valid_pch = c_common_valid_pch; |
91 | cb->read_pch = c_common_read_pch; | |
518796ad | 92 | |
f6e771aa | 93 | /* Set the debug callbacks if we can use them. */ |
94 | if (debug_info_level == DINFO_LEVEL_VERBOSE | |
346e0763 | 95 | && (write_symbols == DWARF2_DEBUG |
a0c938f0 | 96 | || write_symbols == VMS_AND_DWARF2_DEBUG)) |
f6e771aa | 97 | { |
1a88fc96 | 98 | cb->define = cb_define; |
99 | cb->undef = cb_undef; | |
f6e771aa | 100 | } |
14ace7ea | 101 | } |
102 | ||
518796ad | 103 | struct c_fileinfo * |
2b30d46c | 104 | get_fileinfo (const char *name) |
14ace7ea | 105 | { |
518796ad | 106 | splay_tree_node n; |
107 | struct c_fileinfo *fi; | |
108 | ||
62bf98ad | 109 | if (!file_info_tree) |
84166705 | 110 | file_info_tree = splay_tree_new ((splay_tree_compare_fn) strcmp, |
62bf98ad | 111 | 0, |
84166705 | 112 | (splay_tree_delete_value_fn) free); |
62bf98ad | 113 | |
518796ad | 114 | n = splay_tree_lookup (file_info_tree, (splay_tree_key) name); |
115 | if (n) | |
116 | return (struct c_fileinfo *) n->value; | |
117 | ||
9318f22c | 118 | fi = XNEW (struct c_fileinfo); |
518796ad | 119 | fi->time = 0; |
120 | fi->interface_only = 0; | |
121 | fi->interface_unknown = 1; | |
122 | splay_tree_insert (file_info_tree, (splay_tree_key) name, | |
123 | (splay_tree_value) fi); | |
124 | return fi; | |
4e92a8df | 125 | } |
14ace7ea | 126 | |
518796ad | 127 | static void |
2b30d46c | 128 | update_header_times (const char *name) |
dbb0cd11 | 129 | { |
518796ad | 130 | /* Changing files again. This means currently collected time |
131 | is charged against header time, and body time starts back at 0. */ | |
132 | if (flag_detailed_statistics) | |
dbb0cd11 | 133 | { |
518796ad | 134 | int this_time = get_run_time (); |
135 | struct c_fileinfo *file = get_fileinfo (name); | |
136 | header_time += this_time - body_time; | |
137 | file->time += this_time - body_time; | |
138 | body_time = this_time; | |
dbb0cd11 | 139 | } |
140 | } | |
141 | ||
518796ad | 142 | static int |
9a03a746 | 143 | dump_one_header (splay_tree_node n, void * ARG_UNUSED (dummy)) |
dbb0cd11 | 144 | { |
518796ad | 145 | print_time ((const char *) n->key, |
146 | ((struct c_fileinfo *) n->value)->time); | |
147 | return 0; | |
dbb0cd11 | 148 | } |
dbb0cd11 | 149 | |
150 | void | |
2b30d46c | 151 | dump_time_statistics (void) |
dbb0cd11 | 152 | { |
518796ad | 153 | struct c_fileinfo *file = get_fileinfo (input_filename); |
154 | int this_time = get_run_time (); | |
155 | file->time += this_time - body_time; | |
156 | ||
157 | fprintf (stderr, "\n******\n"); | |
158 | print_time ("header files (total)", header_time); | |
159 | print_time ("main file (total)", this_time - body_time); | |
160 | fprintf (stderr, "ratio = %g : 1\n", | |
84166705 | 161 | (double) header_time / (double) (this_time - body_time)); |
518796ad | 162 | fprintf (stderr, "\n******\n"); |
163 | ||
164 | splay_tree_foreach (file_info_tree, dump_one_header, 0); | |
dbb0cd11 | 165 | } |
2fbc2baa | 166 | |
518796ad | 167 | static void |
9a03a746 | 168 | cb_ident (cpp_reader * ARG_UNUSED (pfile), |
169 | unsigned int ARG_UNUSED (line), | |
170 | const cpp_string * ARG_UNUSED (str)) | |
518796ad | 171 | { |
518796ad | 172 | #ifdef ASM_OUTPUT_IDENT |
84166705 | 173 | if (!flag_no_ident) |
518796ad | 174 | { |
d7503801 | 175 | /* Convert escapes in the string. */ |
ebc03810 | 176 | cpp_string cstr = { 0, 0 }; |
924bbf02 | 177 | if (cpp_interpret_string (pfile, str, 1, &cstr, CPP_STRING)) |
ebc03810 | 178 | { |
32d0edd1 | 179 | ASM_OUTPUT_IDENT (asm_out_file, (const char *) cstr.text); |
e47a6f81 | 180 | free (CONST_CAST (unsigned char *, cstr.text)); |
ebc03810 | 181 | } |
518796ad | 182 | } |
183 | #endif | |
d7503801 | 184 | } |
185 | ||
5621a364 | 186 | /* Called at the start of every non-empty line. TOKEN is the first |
187 | lexed token on the line. Used for diagnostic line numbers. */ | |
188 | static void | |
9a03a746 | 189 | cb_line_change (cpp_reader * ARG_UNUSED (pfile), const cpp_token *token, |
652b3139 | 190 | int parsing_args) |
5621a364 | 191 | { |
610625e3 | 192 | if (token->type != CPP_EOF && !parsing_args) |
9a6486a6 | 193 | input_location = token->src_loc; |
5621a364 | 194 | } |
195 | ||
b717e161 | 196 | void |
2b30d46c | 197 | fe_file_change (const struct line_map *new_map) |
d7503801 | 198 | { |
a1c7eda2 | 199 | if (new_map == NULL) |
610625e3 | 200 | return; |
a1c7eda2 | 201 | |
f85fcf2b | 202 | if (new_map->reason == LC_ENTER) |
10816a22 | 203 | { |
d7463c56 | 204 | /* Don't stack the main buffer on the input stack; |
205 | we already did in compile_file. */ | |
84166705 | 206 | if (!MAIN_FILE_P (new_map)) |
518796ad | 207 | { |
35df0168 | 208 | unsigned int included_at = LAST_SOURCE_LINE_LOCATION (new_map - 1); |
209 | int line = 0; | |
210 | if (included_at > BUILTINS_LOCATION) | |
211 | line = SOURCE_LINE (new_map - 1, included_at); | |
9a6486a6 | 212 | |
26cb3d1c | 213 | input_location = new_map->start_location; |
35df0168 | 214 | (*debug_hooks->start_source_file) (line, new_map->to_file); |
d7503801 | 215 | #ifndef NO_IMPLICIT_EXTERN_C |
216 | if (c_header_level) | |
217 | ++c_header_level; | |
f85fcf2b | 218 | else if (new_map->sysp == 2) |
d7503801 | 219 | { |
220 | c_header_level = 1; | |
221 | ++pending_lang_change; | |
222 | } | |
518796ad | 223 | #endif |
d7503801 | 224 | } |
10816a22 | 225 | } |
f85fcf2b | 226 | else if (new_map->reason == LC_LEAVE) |
10816a22 | 227 | { |
518796ad | 228 | #ifndef NO_IMPLICIT_EXTERN_C |
f85fcf2b | 229 | if (c_header_level && --c_header_level == 0) |
230 | { | |
231 | if (new_map->sysp == 2) | |
c3ceba8e | 232 | warning (0, "badly nested C headers from preprocessor"); |
f85fcf2b | 233 | --pending_lang_change; |
234 | } | |
f85fcf2b | 235 | #endif |
26cb3d1c | 236 | input_location = new_map->start_location; |
2b30d46c | 237 | |
8eed96ae | 238 | (*debug_hooks->end_source_file) (new_map->to_line); |
dbb0cd11 | 239 | } |
10816a22 | 240 | |
f85fcf2b | 241 | update_header_times (new_map->to_file); |
9a6486a6 | 242 | input_location = new_map->start_location; |
518796ad | 243 | } |
1fcd08b1 | 244 | |
245 | static void | |
610625e3 | 246 | cb_def_pragma (cpp_reader *pfile, source_location loc) |
1fcd08b1 | 247 | { |
248 | /* Issue a warning message if we have been asked to do so. Ignore | |
249 | unknown pragmas in system headers unless an explicit | |
2c0e001b | 250 | -Wunknown-pragmas has been given. */ |
1fcd08b1 | 251 | if (warn_unknown_pragmas > in_system_header) |
252 | { | |
00ef4b34 | 253 | const unsigned char *space, *name; |
254 | const cpp_token *s; | |
00ef4b34 | 255 | location_t fe_loc = loc; |
e3ff39a1 | 256 | |
5ae4caef | 257 | space = name = (const unsigned char *) ""; |
f9b5f742 | 258 | s = cpp_get_token (pfile); |
5ae4caef | 259 | if (s->type != CPP_EOF) |
260 | { | |
261 | space = cpp_token_as_text (pfile, s); | |
262 | s = cpp_get_token (pfile); | |
263 | if (s->type == CPP_NAME) | |
264 | name = cpp_token_as_text (pfile, s); | |
265 | } | |
1fcd08b1 | 266 | |
e8d0745d | 267 | warning (OPT_Wunknown_pragmas, "%Hignoring #pragma %s %s", |
268 | &fe_loc, space, name); | |
1fcd08b1 | 269 | } |
270 | } | |
518796ad | 271 | |
f6e771aa | 272 | /* #define callback for DWARF and DWARF2 debug info. */ |
273 | static void | |
610625e3 | 274 | cb_define (cpp_reader *pfile, source_location loc, cpp_hashnode *node) |
f6e771aa | 275 | { |
931b0a0f | 276 | const struct line_map *map = linemap_lookup (line_table, loc); |
610625e3 | 277 | (*debug_hooks->define) (SOURCE_LINE (map, loc), |
c140b944 | 278 | (const char *) cpp_macro_definition (pfile, node)); |
f6e771aa | 279 | } |
280 | ||
281 | /* #undef callback for DWARF and DWARF2 debug info. */ | |
282 | static void | |
9a03a746 | 283 | cb_undef (cpp_reader * ARG_UNUSED (pfile), source_location loc, |
2b30d46c | 284 | cpp_hashnode *node) |
f6e771aa | 285 | { |
931b0a0f | 286 | const struct line_map *map = linemap_lookup (line_table, loc); |
610625e3 | 287 | (*debug_hooks->undef) (SOURCE_LINE (map, loc), |
c140b944 | 288 | (const char *) NODE_NAME (node)); |
f6e771aa | 289 | } |
dbb0cd11 | 290 | \f |
61cc302f | 291 | /* Read a token and return its type. Fill *VALUE with its value, if |
292 | applicable. Fill *CPP_FLAGS with the token's flags, if it is | |
293 | non-NULL. */ | |
ebc03810 | 294 | |
ec03958b | 295 | enum cpp_ttype |
8115b8be | 296 | c_lex_with_flags (tree *value, location_t *loc, unsigned char *cpp_flags, |
297 | int lex_flags) | |
ebc03810 | 298 | { |
ddf4604f | 299 | static bool no_more_pch; |
61cc302f | 300 | const cpp_token *tok; |
301 | enum cpp_ttype type; | |
8dba02f7 | 302 | unsigned char add_flags = 0; |
ebc03810 | 303 | |
61cc302f | 304 | timevar_push (TV_CPP); |
ebc03810 | 305 | retry: |
931b0a0f | 306 | tok = cpp_get_token_with_location (parse_in, loc); |
931b0a0f | 307 | type = tok->type; |
308 | ||
309 | retry_after_at: | |
61cc302f | 310 | switch (type) |
518796ad | 311 | { |
61cc302f | 312 | case CPP_PADDING: |
313 | goto retry; | |
a0c938f0 | 314 | |
518796ad | 315 | case CPP_NAME: |
f9b5f742 | 316 | *value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node)); |
518796ad | 317 | break; |
10816a22 | 318 | |
518796ad | 319 | case CPP_NUMBER: |
f5ec8cb5 | 320 | { |
321 | unsigned int flags = cpp_classify_number (parse_in, tok); | |
322 | ||
323 | switch (flags & CPP_N_CATEGORY) | |
324 | { | |
325 | case CPP_N_INVALID: | |
326 | /* cpplib has issued an error. */ | |
e915f664 | 327 | *value = error_mark_node; |
7a8c1294 | 328 | errorcount++; |
f5ec8cb5 | 329 | break; |
330 | ||
331 | case CPP_N_INTEGER: | |
8dba02f7 | 332 | /* C++ uses '0' to mark virtual functions as pure. |
333 | Set PURE_ZERO to pass this information to the C++ parser. */ | |
334 | if (tok->val.str.len == 1 && *tok->val.str.text == '0') | |
335 | add_flags = PURE_ZERO; | |
f5ec8cb5 | 336 | *value = interpret_integer (tok, flags); |
337 | break; | |
338 | ||
339 | case CPP_N_FLOATING: | |
340 | *value = interpret_float (tok, flags); | |
341 | break; | |
342 | ||
343 | default: | |
231bd014 | 344 | gcc_unreachable (); |
f5ec8cb5 | 345 | } |
346 | } | |
518796ad | 347 | break; |
01ce7a1b | 348 | |
ebc03810 | 349 | case CPP_ATSIGN: |
350 | /* An @ may give the next token special significance in Objective-C. */ | |
ebc03810 | 351 | if (c_dialect_objc ()) |
352 | { | |
931b0a0f | 353 | location_t atloc = *loc; |
354 | location_t newloc; | |
a0c938f0 | 355 | |
61cc302f | 356 | retry_at: |
931b0a0f | 357 | tok = cpp_get_token_with_location (parse_in, &newloc); |
61cc302f | 358 | type = tok->type; |
359 | switch (type) | |
ebc03810 | 360 | { |
61cc302f | 361 | case CPP_PADDING: |
362 | goto retry_at; | |
a0c938f0 | 363 | |
61cc302f | 364 | case CPP_STRING: |
365 | case CPP_WSTRING: | |
924bbf02 | 366 | case CPP_STRING16: |
367 | case CPP_STRING32: | |
8115b8be | 368 | type = lex_string (tok, value, true, true); |
61cc302f | 369 | break; |
370 | ||
ebc03810 | 371 | case CPP_NAME: |
61cc302f | 372 | *value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node)); |
373 | if (objc_is_reserved_word (*value)) | |
ebc03810 | 374 | { |
61cc302f | 375 | type = CPP_AT_NAME; |
376 | break; | |
ebc03810 | 377 | } |
61cc302f | 378 | /* FALLTHROUGH */ |
ebc03810 | 379 | |
61cc302f | 380 | default: |
381 | /* ... or not. */ | |
382 | error ("%Hstray %<@%> in program", &atloc); | |
931b0a0f | 383 | *loc = newloc; |
61cc302f | 384 | goto retry_after_at; |
ebc03810 | 385 | } |
61cc302f | 386 | break; |
ebc03810 | 387 | } |
388 | ||
61cc302f | 389 | /* FALLTHROUGH */ |
390 | case CPP_HASH: | |
391 | case CPP_PASTE: | |
392 | { | |
393 | unsigned char name[4]; | |
a0c938f0 | 394 | |
bb1fa6bb | 395 | *cpp_spell_token (parse_in, tok, name, true) = 0; |
a0c938f0 | 396 | |
61cc302f | 397 | error ("stray %qs in program", name); |
398 | } | |
a0c938f0 | 399 | |
61cc302f | 400 | goto retry; |
ebc03810 | 401 | |
4970d4c2 | 402 | case CPP_OTHER: |
403 | { | |
404 | cppchar_t c = tok->val.str.text[0]; | |
405 | ||
406 | if (c == '"' || c == '\'') | |
407 | error ("missing terminating %c character", (int) c); | |
408 | else if (ISGRAPH (c)) | |
61cc302f | 409 | error ("stray %qc in program", (int) c); |
4970d4c2 | 410 | else |
61cc302f | 411 | error ("stray %<\\%o%> in program", (int) c); |
4970d4c2 | 412 | } |
413 | goto retry; | |
414 | ||
518796ad | 415 | case CPP_CHAR: |
416 | case CPP_WCHAR: | |
924bbf02 | 417 | case CPP_CHAR16: |
418 | case CPP_CHAR32: | |
f9b5f742 | 419 | *value = lex_charconst (tok); |
518796ad | 420 | break; |
10816a22 | 421 | |
518796ad | 422 | case CPP_STRING: |
423 | case CPP_WSTRING: | |
924bbf02 | 424 | case CPP_STRING16: |
425 | case CPP_STRING32: | |
8115b8be | 426 | if ((lex_flags & C_LEX_RAW_STRINGS) == 0) |
61cc302f | 427 | { |
8115b8be | 428 | type = lex_string (tok, value, false, |
429 | (lex_flags & C_LEX_STRING_NO_TRANSLATE) == 0); | |
61cc302f | 430 | break; |
431 | } | |
c1fdef8e | 432 | *value = build_string (tok->val.str.len, (const char *) tok->val.str.text); |
b75b98aa | 433 | break; |
61cc302f | 434 | |
00d26680 | 435 | case CPP_PRAGMA: |
b75b98aa | 436 | *value = build_int_cst (NULL, tok->val.pragma); |
518796ad | 437 | break; |
10816a22 | 438 | |
518796ad | 439 | /* These tokens should not be visible outside cpplib. */ |
440 | case CPP_HEADER_NAME: | |
441 | case CPP_COMMENT: | |
442 | case CPP_MACRO_ARG: | |
231bd014 | 443 | gcc_unreachable (); |
518796ad | 444 | |
ebc03810 | 445 | default: |
446 | *value = NULL_TREE; | |
447 | break; | |
518796ad | 448 | } |
449 | ||
61cc302f | 450 | if (cpp_flags) |
8dba02f7 | 451 | *cpp_flags = tok->flags | add_flags; |
61cc302f | 452 | |
84166705 | 453 | if (!no_more_pch) |
ddf4604f | 454 | { |
455 | no_more_pch = true; | |
456 | c_common_no_more_pch (); | |
457 | } | |
a0c938f0 | 458 | |
61cc302f | 459 | timevar_pop (TV_CPP); |
a0c938f0 | 460 | |
61cc302f | 461 | return type; |
518796ad | 462 | } |
7224cf20 | 463 | |
f5ec8cb5 | 464 | /* Returns the narrowest C-visible unsigned type, starting with the |
2364e487 | 465 | minimum specified by FLAGS, that can fit HIGH:LOW, or itk_none if |
f5ec8cb5 | 466 | there isn't one. */ |
2364e487 | 467 | |
f5ec8cb5 | 468 | static enum integer_type_kind |
2364e487 | 469 | narrowest_unsigned_type (unsigned HOST_WIDE_INT low, |
470 | unsigned HOST_WIDE_INT high, | |
471 | unsigned int flags) | |
518796ad | 472 | { |
7d339f93 | 473 | int itk; |
33a62e3f | 474 | |
f5ec8cb5 | 475 | if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) |
476 | itk = itk_unsigned_int; | |
477 | else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM) | |
478 | itk = itk_unsigned_long; | |
479 | else | |
480 | itk = itk_unsigned_long_long; | |
dbb0cd11 | 481 | |
f5ec8cb5 | 482 | for (; itk < itk_none; itk += 2 /* skip unsigned types */) |
2364e487 | 483 | { |
484 | tree upper = TYPE_MAX_VALUE (integer_types[itk]); | |
485 | ||
84166705 | 486 | if ((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (upper) > high |
487 | || ((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (upper) == high | |
2364e487 | 488 | && TREE_INT_CST_LOW (upper) >= low)) |
7d339f93 | 489 | return (enum integer_type_kind) itk; |
2364e487 | 490 | } |
33a62e3f | 491 | |
f5ec8cb5 | 492 | return itk_none; |
493 | } | |
dbb0cd11 | 494 | |
f5ec8cb5 | 495 | /* Ditto, but narrowest signed type. */ |
496 | static enum integer_type_kind | |
2364e487 | 497 | narrowest_signed_type (unsigned HOST_WIDE_INT low, |
498 | unsigned HOST_WIDE_INT high, unsigned int flags) | |
f5ec8cb5 | 499 | { |
7d339f93 | 500 | int itk; |
dbb0cd11 | 501 | |
f5ec8cb5 | 502 | if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) |
503 | itk = itk_int; | |
504 | else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM) | |
505 | itk = itk_long; | |
506 | else | |
507 | itk = itk_long_long; | |
dbb0cd11 | 508 | |
dbb0cd11 | 509 | |
f5ec8cb5 | 510 | for (; itk < itk_none; itk += 2 /* skip signed types */) |
2364e487 | 511 | { |
512 | tree upper = TYPE_MAX_VALUE (integer_types[itk]); | |
a0c938f0 | 513 | |
84166705 | 514 | if ((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (upper) > high |
515 | || ((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (upper) == high | |
2364e487 | 516 | && TREE_INT_CST_LOW (upper) >= low)) |
7d339f93 | 517 | return (enum integer_type_kind) itk; |
2364e487 | 518 | } |
536f5fb1 | 519 | |
f5ec8cb5 | 520 | return itk_none; |
521 | } | |
536f5fb1 | 522 | |
f5ec8cb5 | 523 | /* Interpret TOKEN, an integer with FLAGS as classified by cpplib. */ |
524 | static tree | |
2b30d46c | 525 | interpret_integer (const cpp_token *token, unsigned int flags) |
f5ec8cb5 | 526 | { |
527 | tree value, type; | |
528 | enum integer_type_kind itk; | |
529 | cpp_num integer; | |
530 | cpp_options *options = cpp_get_options (parse_in); | |
531 | ||
532 | integer = cpp_interpret_integer (parse_in, token, flags); | |
533 | integer = cpp_num_sign_extend (integer, options->precision); | |
f5ec8cb5 | 534 | |
535 | /* The type of a constant with a U suffix is straightforward. */ | |
536 | if (flags & CPP_N_UNSIGNED) | |
2364e487 | 537 | itk = narrowest_unsigned_type (integer.low, integer.high, flags); |
518796ad | 538 | else |
539 | { | |
f5ec8cb5 | 540 | /* The type of a potentially-signed integer constant varies |
541 | depending on the base it's in, the standard in use, and the | |
542 | length suffixes. */ | |
2364e487 | 543 | enum integer_type_kind itk_u |
544 | = narrowest_unsigned_type (integer.low, integer.high, flags); | |
545 | enum integer_type_kind itk_s | |
546 | = narrowest_signed_type (integer.low, integer.high, flags); | |
f5ec8cb5 | 547 | |
548 | /* In both C89 and C99, octal and hex constants may be signed or | |
549 | unsigned, whichever fits tighter. We do not warn about this | |
550 | choice differing from the traditional choice, as the constant | |
551 | is probably a bit pattern and either way will work. */ | |
552 | if ((flags & CPP_N_RADIX) != CPP_N_DECIMAL) | |
553 | itk = MIN (itk_u, itk_s); | |
554 | else | |
518796ad | 555 | { |
f5ec8cb5 | 556 | /* In C99, decimal constants are always signed. |
557 | In C89, decimal constants that don't fit in long have | |
974e2c0c | 558 | undefined behavior; we try to make them unsigned long. |
f5ec8cb5 | 559 | In GCC's extended C89, that last is true of decimal |
560 | constants that don't fit in long long, too. */ | |
561 | ||
562 | itk = itk_s; | |
563 | if (itk_s > itk_u && itk_s > itk_long) | |
518796ad | 564 | { |
f5ec8cb5 | 565 | if (!flag_isoc99) |
518796ad | 566 | { |
f5ec8cb5 | 567 | if (itk_u < itk_unsigned_long) |
568 | itk_u = itk_unsigned_long; | |
569 | itk = itk_u; | |
c3ceba8e | 570 | warning (0, "this decimal constant is unsigned only in ISO C90"); |
518796ad | 571 | } |
8b6866af | 572 | else |
573 | warning (OPT_Wtraditional, | |
574 | "this decimal constant would be unsigned in ISO C90"); | |
518796ad | 575 | } |
576 | } | |
f5ec8cb5 | 577 | } |
33a62e3f | 578 | |
f5ec8cb5 | 579 | if (itk == itk_none) |
580 | /* cpplib has already issued a warning for overflow. */ | |
581 | type = ((flags & CPP_N_UNSIGNED) | |
582 | ? widest_unsigned_literal_type_node | |
583 | : widest_integer_literal_type_node); | |
584 | else | |
585 | type = integer_types[itk]; | |
dbb0cd11 | 586 | |
f5ec8cb5 | 587 | if (itk > itk_unsigned_long |
588 | && (flags & CPP_N_WIDTH) != CPP_N_LARGE | |
84166705 | 589 | && !in_system_header && !flag_isoc99) |
21ca8540 | 590 | pedwarn (input_location, 0, "integer constant is too large for %qs type", |
591 | (flags & CPP_N_UNSIGNED) ? "unsigned long" : "long"); | |
8fd54344 | 592 | |
7016c612 | 593 | value = build_int_cst_wide (type, integer.low, integer.high); |
dbb0cd11 | 594 | |
f5ec8cb5 | 595 | /* Convert imaginary to a complex type. */ |
596 | if (flags & CPP_N_IMAGINARY) | |
7016c612 | 597 | value = build_complex (NULL_TREE, build_int_cst (type, 0), value); |
dbb0cd11 | 598 | |
f5ec8cb5 | 599 | return value; |
600 | } | |
dbb0cd11 | 601 | |
f5ec8cb5 | 602 | /* Interpret TOKEN, a floating point number with FLAGS as classified |
603 | by cpplib. */ | |
604 | static tree | |
2b30d46c | 605 | interpret_float (const cpp_token *token, unsigned int flags) |
f5ec8cb5 | 606 | { |
607 | tree type; | |
608 | tree value; | |
609 | REAL_VALUE_TYPE real; | |
610 | char *copy; | |
611 | size_t copylen; | |
dbb0cd11 | 612 | |
b563b483 | 613 | /* Decode _Fract and _Accum. */ |
614 | if (flags & CPP_N_FRACT || flags & CPP_N_ACCUM) | |
615 | return interpret_fixed (token, flags); | |
616 | ||
c4503c0a | 617 | /* Decode type based on width and properties. */ |
618 | if (flags & CPP_N_DFLOAT) | |
619 | if ((flags & CPP_N_WIDTH) == CPP_N_LARGE) | |
620 | type = dfloat128_type_node; | |
621 | else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) | |
622 | type = dfloat32_type_node; | |
623 | else | |
624 | type = dfloat64_type_node; | |
625 | else | |
430be8e2 | 626 | if (flags & CPP_N_WIDTH_MD) |
627 | { | |
628 | char suffix; | |
629 | enum machine_mode mode; | |
630 | ||
631 | if ((flags & CPP_N_WIDTH_MD) == CPP_N_MD_W) | |
632 | suffix = 'w'; | |
633 | else | |
634 | suffix = 'q'; | |
635 | ||
636 | mode = targetm.c.mode_for_suffix (suffix); | |
637 | if (mode == VOIDmode) | |
638 | { | |
639 | error ("unsupported non-standard suffix on floating constant"); | |
640 | errorcount++; | |
641 | ||
642 | return error_mark_node; | |
643 | } | |
8864917d | 644 | else |
21ca8540 | 645 | pedwarn (input_location, OPT_pedantic, "non-standard suffix on floating constant"); |
430be8e2 | 646 | |
647 | type = c_common_type_for_mode (mode, 0); | |
648 | gcc_assert (type); | |
649 | } | |
650 | else if ((flags & CPP_N_WIDTH) == CPP_N_LARGE) | |
f5ec8cb5 | 651 | type = long_double_type_node; |
c4503c0a | 652 | else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL |
653 | || flag_single_precision_constant) | |
f5ec8cb5 | 654 | type = float_type_node; |
c4503c0a | 655 | else |
f5ec8cb5 | 656 | type = double_type_node; |
dbb0cd11 | 657 | |
f5ec8cb5 | 658 | /* Copy the constant to a nul-terminated buffer. If the constant |
659 | has any suffixes, cut them off; REAL_VALUE_ATOF/ REAL_VALUE_HTOF | |
660 | can't handle them. */ | |
661 | copylen = token->val.str.len; | |
c4503c0a | 662 | if (flags & CPP_N_DFLOAT) |
663 | copylen -= 2; | |
664 | else | |
665 | { | |
666 | if ((flags & CPP_N_WIDTH) != CPP_N_MEDIUM) | |
430be8e2 | 667 | /* Must be an F or L or machine defined suffix. */ |
c4503c0a | 668 | copylen--; |
669 | if (flags & CPP_N_IMAGINARY) | |
670 | /* I or J suffix. */ | |
671 | copylen--; | |
672 | } | |
f5ec8cb5 | 673 | |
4fd61bc6 | 674 | copy = (char *) alloca (copylen + 1); |
f5ec8cb5 | 675 | memcpy (copy, token->val.str.text, copylen); |
676 | copy[copylen] = '\0'; | |
677 | ||
c4503c0a | 678 | real_from_string3 (&real, copy, TYPE_MODE (type)); |
10816a22 | 679 | |
40f4dbd5 | 680 | /* Both C and C++ require a diagnostic for a floating constant |
681 | outside the range of representable values of its type. Since we | |
64214dab | 682 | have __builtin_inf* to produce an infinity, this is now a |
683 | mandatory pedwarn if the target does not support infinities. */ | |
684 | if (REAL_VALUE_ISINF (real)) | |
685 | { | |
686 | if (!MODE_HAS_INFINITIES (TYPE_MODE (type))) | |
21ca8540 | 687 | pedwarn (input_location, 0, "floating constant exceeds range of %qT", type); |
64214dab | 688 | else |
689 | warning (OPT_Woverflow, "floating constant exceeds range of %qT", type); | |
690 | } | |
691 | /* We also give a warning if the value underflows. */ | |
692 | else if (REAL_VALUES_EQUAL (real, dconst0)) | |
693 | { | |
694 | REAL_VALUE_TYPE realvoidmode; | |
695 | int overflow = real_from_string (&realvoidmode, copy); | |
696 | if (overflow < 0 || !REAL_VALUES_EQUAL (realvoidmode, dconst0)) | |
697 | warning (OPT_Woverflow, "floating constant truncated to zero"); | |
698 | } | |
10816a22 | 699 | |
f5ec8cb5 | 700 | /* Create a node with determined type and value. */ |
701 | value = build_real (type, real); | |
702 | if (flags & CPP_N_IMAGINARY) | |
703 | value = build_complex (NULL_TREE, convert (type, integer_zero_node), value); | |
dbb0cd11 | 704 | |
518796ad | 705 | return value; |
518796ad | 706 | } |
dbb0cd11 | 707 | |
b563b483 | 708 | /* Interpret TOKEN, a fixed-point number with FLAGS as classified |
709 | by cpplib. */ | |
710 | ||
711 | static tree | |
712 | interpret_fixed (const cpp_token *token, unsigned int flags) | |
713 | { | |
714 | tree type; | |
715 | tree value; | |
716 | FIXED_VALUE_TYPE fixed; | |
717 | char *copy; | |
718 | size_t copylen; | |
719 | ||
720 | copylen = token->val.str.len; | |
721 | ||
722 | if (flags & CPP_N_FRACT) /* _Fract. */ | |
723 | { | |
724 | if (flags & CPP_N_UNSIGNED) /* Unsigned _Fract. */ | |
725 | { | |
726 | if ((flags & CPP_N_WIDTH) == CPP_N_LARGE) | |
727 | { | |
728 | type = unsigned_long_long_fract_type_node; | |
729 | copylen -= 4; | |
730 | } | |
731 | else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM) | |
732 | { | |
733 | type = unsigned_long_fract_type_node; | |
734 | copylen -= 3; | |
735 | } | |
736 | else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) | |
737 | { | |
738 | type = unsigned_short_fract_type_node; | |
739 | copylen -= 3; | |
740 | } | |
741 | else | |
742 | { | |
743 | type = unsigned_fract_type_node; | |
744 | copylen -= 2; | |
745 | } | |
746 | } | |
747 | else /* Signed _Fract. */ | |
748 | { | |
749 | if ((flags & CPP_N_WIDTH) == CPP_N_LARGE) | |
750 | { | |
751 | type = long_long_fract_type_node; | |
752 | copylen -= 3; | |
753 | } | |
754 | else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM) | |
755 | { | |
756 | type = long_fract_type_node; | |
757 | copylen -= 2; | |
758 | } | |
759 | else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) | |
760 | { | |
761 | type = short_fract_type_node; | |
762 | copylen -= 2; | |
763 | } | |
764 | else | |
765 | { | |
766 | type = fract_type_node; | |
767 | copylen --; | |
768 | } | |
769 | } | |
770 | } | |
771 | else /* _Accum. */ | |
772 | { | |
773 | if (flags & CPP_N_UNSIGNED) /* Unsigned _Accum. */ | |
774 | { | |
775 | if ((flags & CPP_N_WIDTH) == CPP_N_LARGE) | |
776 | { | |
777 | type = unsigned_long_long_accum_type_node; | |
778 | copylen -= 4; | |
779 | } | |
780 | else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM) | |
781 | { | |
782 | type = unsigned_long_accum_type_node; | |
783 | copylen -= 3; | |
784 | } | |
785 | else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) | |
786 | { | |
787 | type = unsigned_short_accum_type_node; | |
788 | copylen -= 3; | |
789 | } | |
790 | else | |
791 | { | |
792 | type = unsigned_accum_type_node; | |
793 | copylen -= 2; | |
794 | } | |
795 | } | |
796 | else /* Signed _Accum. */ | |
797 | { | |
798 | if ((flags & CPP_N_WIDTH) == CPP_N_LARGE) | |
799 | { | |
800 | type = long_long_accum_type_node; | |
801 | copylen -= 3; | |
802 | } | |
803 | else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM) | |
804 | { | |
805 | type = long_accum_type_node; | |
806 | copylen -= 2; | |
807 | } | |
808 | else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL) | |
809 | { | |
810 | type = short_accum_type_node; | |
811 | copylen -= 2; | |
812 | } | |
813 | else | |
814 | { | |
815 | type = accum_type_node; | |
816 | copylen --; | |
817 | } | |
818 | } | |
819 | } | |
820 | ||
821 | copy = (char *) alloca (copylen + 1); | |
822 | memcpy (copy, token->val.str.text, copylen); | |
823 | copy[copylen] = '\0'; | |
824 | ||
825 | fixed_from_string (&fixed, copy, TYPE_MODE (type)); | |
826 | ||
827 | /* Create a node with determined type and value. */ | |
828 | value = build_fixed (type, fixed); | |
829 | ||
830 | return value; | |
831 | } | |
832 | ||
924bbf02 | 833 | /* Convert a series of STRING, WSTRING, STRING16 and/or STRING32 tokens |
834 | into a tree, performing string constant concatenation. TOK is the | |
835 | first of these. VALP is the location to write the string into. | |
836 | OBJC_STRING indicates whether an '@' token preceded the incoming token. | |
ebc03810 | 837 | Returns the CPP token type of the result (CPP_STRING, CPP_WSTRING, |
924bbf02 | 838 | CPP_STRING32, CPP_STRING16, or CPP_OBJC_STRING). |
ebc03810 | 839 | |
840 | This is unfortunately more work than it should be. If any of the | |
841 | strings in the series has an L prefix, the result is a wide string | |
842 | (6.4.5p4). Whether or not the result is a wide string affects the | |
843 | meaning of octal and hexadecimal escapes (6.4.4.4p6,9). But escape | |
844 | sequences do not continue across the boundary between two strings in | |
845 | a series (6.4.5p7), so we must not lose the boundaries. Therefore | |
846 | cpp_interpret_string takes a vector of cpp_string structures, which | |
847 | we must arrange to provide. */ | |
848 | ||
849 | static enum cpp_ttype | |
8115b8be | 850 | lex_string (const cpp_token *tok, tree *valp, bool objc_string, bool translate) |
518796ad | 851 | { |
852 | tree value; | |
61cc302f | 853 | size_t concats = 0; |
ebc03810 | 854 | struct obstack str_ob; |
855 | cpp_string istr; | |
924bbf02 | 856 | enum cpp_ttype type = tok->type; |
2b30d46c | 857 | |
ebc03810 | 858 | /* Try to avoid the overhead of creating and destroying an obstack |
859 | for the common case of just one string. */ | |
860 | cpp_string str = tok->val.str; | |
861 | cpp_string *strs = &str; | |
0dbd1c74 | 862 | |
61cc302f | 863 | retry: |
864 | tok = cpp_get_token (parse_in); | |
865 | switch (tok->type) | |
ebc03810 | 866 | { |
61cc302f | 867 | case CPP_PADDING: |
868 | goto retry; | |
869 | case CPP_ATSIGN: | |
870 | if (c_dialect_objc ()) | |
518796ad | 871 | { |
61cc302f | 872 | objc_string = true; |
873 | goto retry; | |
874 | } | |
875 | /* FALLTHROUGH */ | |
a0c938f0 | 876 | |
61cc302f | 877 | default: |
878 | break; | |
a0c938f0 | 879 | |
61cc302f | 880 | case CPP_WSTRING: |
924bbf02 | 881 | case CPP_STRING16: |
882 | case CPP_STRING32: | |
883 | if (type != tok->type) | |
884 | { | |
885 | if (type == CPP_STRING) | |
886 | type = tok->type; | |
887 | else | |
888 | error ("unsupported non-standard concatenation of string literals"); | |
889 | } | |
a0c938f0 | 890 | |
61cc302f | 891 | case CPP_STRING: |
892 | if (!concats) | |
893 | { | |
894 | gcc_obstack_init (&str_ob); | |
895 | obstack_grow (&str_ob, &str, sizeof (cpp_string)); | |
518796ad | 896 | } |
a0c938f0 | 897 | |
61cc302f | 898 | concats++; |
899 | obstack_grow (&str_ob, &tok->val.str, sizeof (cpp_string)); | |
900 | goto retry; | |
dbb0cd11 | 901 | } |
902 | ||
ebc03810 | 903 | /* We have read one more token than we want. */ |
904 | _cpp_backup_tokens (parse_in, 1); | |
61cc302f | 905 | if (concats) |
4fac984f | 906 | strs = XOBFINISH (&str_ob, cpp_string *); |
ebc03810 | 907 | |
8b6866af | 908 | if (concats && !objc_string && !in_system_header) |
909 | warning (OPT_Wtraditional, | |
910 | "traditional C rejects string constant concatenation"); | |
dbb0cd11 | 911 | |
8115b8be | 912 | if ((translate |
ccb84981 | 913 | ? cpp_interpret_string : cpp_interpret_string_notranslate) |
924bbf02 | 914 | (parse_in, strs, concats + 1, &istr, type)) |
518796ad | 915 | { |
c1fdef8e | 916 | value = build_string (istr.len, (const char *) istr.text); |
e47a6f81 | 917 | free (CONST_CAST (unsigned char *, istr.text)); |
518796ad | 918 | } |
919 | else | |
920 | { | |
ebc03810 | 921 | /* Callers cannot generally handle error_mark_node in this context, |
922 | so return the empty string instead. cpp_interpret_string has | |
923 | issued an error. */ | |
924bbf02 | 924 | switch (type) |
925 | { | |
926 | default: | |
927 | case CPP_STRING: | |
928 | value = build_string (1, ""); | |
929 | break; | |
930 | case CPP_STRING16: | |
931 | value = build_string (TYPE_PRECISION (char16_type_node) | |
932 | / TYPE_PRECISION (char_type_node), | |
933 | "\0"); /* char16_t is 16 bits */ | |
934 | break; | |
935 | case CPP_STRING32: | |
936 | value = build_string (TYPE_PRECISION (char32_type_node) | |
937 | / TYPE_PRECISION (char_type_node), | |
938 | "\0\0\0"); /* char32_t is 32 bits */ | |
939 | break; | |
940 | case CPP_WSTRING: | |
941 | value = build_string (TYPE_PRECISION (wchar_type_node) | |
942 | / TYPE_PRECISION (char_type_node), | |
943 | "\0\0\0"); /* widest supported wchar_t | |
944 | is 32 bits */ | |
945 | break; | |
946 | } | |
518796ad | 947 | } |
948 | ||
924bbf02 | 949 | switch (type) |
950 | { | |
951 | default: | |
952 | case CPP_STRING: | |
953 | TREE_TYPE (value) = char_array_type_node; | |
954 | break; | |
955 | case CPP_STRING16: | |
956 | TREE_TYPE (value) = char16_array_type_node; | |
957 | break; | |
958 | case CPP_STRING32: | |
959 | TREE_TYPE (value) = char32_array_type_node; | |
960 | break; | |
961 | case CPP_WSTRING: | |
962 | TREE_TYPE (value) = wchar_array_type_node; | |
963 | } | |
ebc03810 | 964 | *valp = fix_string_type (value); |
518796ad | 965 | |
61cc302f | 966 | if (concats) |
ebc03810 | 967 | obstack_free (&str_ob, 0); |
968 | ||
924bbf02 | 969 | return objc_string ? CPP_OBJC_STRING : type; |
dbb0cd11 | 970 | } |
971 | ||
8330799c | 972 | /* Converts a (possibly wide) character constant token into a tree. */ |
518796ad | 973 | static tree |
2b30d46c | 974 | lex_charconst (const cpp_token *token) |
dbb0cd11 | 975 | { |
13c457e1 | 976 | cppchar_t result; |
c2527f80 | 977 | tree type, value; |
8330799c | 978 | unsigned int chars_seen; |
748f1ae5 | 979 | int unsignedp = 0; |
f5ec8cb5 | 980 | |
318fdd81 | 981 | result = cpp_interpret_charconst (parse_in, token, |
2b30d46c | 982 | &chars_seen, &unsignedp); |
c2527f80 | 983 | |
13c457e1 | 984 | if (token->type == CPP_WCHAR) |
985 | type = wchar_type_node; | |
924bbf02 | 986 | else if (token->type == CPP_CHAR32) |
987 | type = char32_type_node; | |
988 | else if (token->type == CPP_CHAR16) | |
989 | type = char16_type_node; | |
13c457e1 | 990 | /* In C, a character constant has type 'int'. |
991 | In C++ 'char', but multi-char charconsts have type 'int'. */ | |
c0f19401 | 992 | else if (!c_dialect_cxx () || chars_seen > 1) |
13c457e1 | 993 | type = integer_type_node; |
994 | else | |
995 | type = char_type_node; | |
c2527f80 | 996 | |
7c446c95 | 997 | /* Cast to cppchar_signed_t to get correct sign-extension of RESULT |
998 | before possibly widening to HOST_WIDE_INT for build_int_cst. */ | |
999 | if (unsignedp || (cppchar_signed_t) result >= 0) | |
7016c612 | 1000 | value = build_int_cst_wide (type, result, 0); |
7c446c95 | 1001 | else |
7016c612 | 1002 | value = build_int_cst_wide (type, (cppchar_signed_t) result, -1); |
7c446c95 | 1003 | |
518796ad | 1004 | return value; |
dbb0cd11 | 1005 | } |