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d45cf215 | 1 | /* Lexical analyzer for C and Objective C. |
517cbe13 JL |
2 | Copyright (C) 1987, 1988, 1989, 1992, 1994, 1995, 1996, 1997 |
3 | 1998, 1999, 2000 Free Software Foundation, Inc. | |
e8bbfc4e RK |
4 | |
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
940d9d63 RK |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
e8bbfc4e | 21 | |
e9a25f70 | 22 | #include "config.h" |
670ee920 | 23 | #include "system.h" |
e8bbfc4e | 24 | |
e8bbfc4e | 25 | #include "rtl.h" |
8f17b5c5 | 26 | #include "expr.h" |
e8bbfc4e RK |
27 | #include "tree.h" |
28 | #include "input.h" | |
d6f4ec51 | 29 | #include "output.h" |
e8bbfc4e RK |
30 | #include "c-lex.h" |
31 | #include "c-tree.h" | |
32 | #include "flags.h" | |
0e5921e8 | 33 | #include "timevar.h" |
8b97c5f8 | 34 | #include "cpplib.h" |
3d6f7931 | 35 | #include "c-pragma.h" |
5f6da302 | 36 | #include "toplev.h" |
ab87f8c8 | 37 | #include "intl.h" |
7bdb32b9 | 38 | #include "tm_p.h" |
0e5921e8 | 39 | #include "splay-tree.h" |
7f905405 | 40 | #include "debug.h" |
ab87f8c8 | 41 | |
ab87f8c8 JL |
42 | /* MULTIBYTE_CHARS support only works for native compilers. |
43 | ??? Ideally what we want is to model widechar support after | |
44 | the current floating point support. */ | |
45 | #ifdef CROSS_COMPILE | |
46 | #undef MULTIBYTE_CHARS | |
47 | #endif | |
e8bbfc4e RK |
48 | |
49 | #ifdef MULTIBYTE_CHARS | |
56f48ce9 | 50 | #include "mbchar.h" |
e8bbfc4e | 51 | #include <locale.h> |
56f48ce9 | 52 | #endif /* MULTIBYTE_CHARS */ |
c5c76735 JL |
53 | #ifndef GET_ENVIRONMENT |
54 | #define GET_ENVIRONMENT(ENV_VALUE,ENV_NAME) ((ENV_VALUE) = getenv (ENV_NAME)) | |
55 | #endif | |
e8bbfc4e | 56 | |
373e2177 NB |
57 | /* The input filename as understood by CPP, where "" represents stdin. */ |
58 | static const char *cpp_filename; | |
3aac38d7 | 59 | |
0e5921e8 ZW |
60 | /* We may keep statistics about how long which files took to compile. */ |
61 | static int header_time, body_time; | |
62 | static splay_tree file_info_tree; | |
3ab6dd7c | 63 | |
e8bbfc4e RK |
64 | /* Cause the `yydebug' variable to be defined. */ |
65 | #define YYDEBUG 1 | |
66 | ||
e8bbfc4e RK |
67 | /* File used for outputting assembler code. */ |
68 | extern FILE *asm_out_file; | |
69 | ||
12a39b12 JM |
70 | #undef WCHAR_TYPE_SIZE |
71 | #define WCHAR_TYPE_SIZE TYPE_PRECISION (wchar_type_node) | |
e8bbfc4e RK |
72 | |
73 | /* Number of bytes in a wide character. */ | |
74 | #define WCHAR_BYTES (WCHAR_TYPE_SIZE / BITS_PER_UNIT) | |
75 | ||
ec5c56db | 76 | int indent_level; /* Number of { minus number of }. */ |
0e5921e8 ZW |
77 | int pending_lang_change; /* If we need to switch languages - C++ only */ |
78 | int c_header_level; /* depth in C headers - C++ only */ | |
fbb18613 JM |
79 | |
80 | /* Nonzero tells yylex to ignore \ in string constants. */ | |
81 | static int ignore_escape_flag; | |
e9a25f70 | 82 | |
0e5921e8 ZW |
83 | static void parse_float PARAMS ((PTR)); |
84 | static tree lex_number PARAMS ((const char *, unsigned int)); | |
85 | static tree lex_string PARAMS ((const char *, unsigned int, int)); | |
c8a96070 | 86 | static tree lex_charconst PARAMS ((const cpp_token *)); |
0e5921e8 ZW |
87 | static void update_header_times PARAMS ((const char *)); |
88 | static int dump_one_header PARAMS ((splay_tree_node, void *)); | |
8bbbef34 NB |
89 | static void cb_ident PARAMS ((cpp_reader *, unsigned int, |
90 | const cpp_string *)); | |
eb1f4d9d | 91 | static void cb_file_change PARAMS ((cpp_reader *, const cpp_file_change *)); |
8bbbef34 NB |
92 | static void cb_def_pragma PARAMS ((cpp_reader *, unsigned int)); |
93 | static void cb_define PARAMS ((cpp_reader *, unsigned int, | |
94 | cpp_hashnode *)); | |
95 | static void cb_undef PARAMS ((cpp_reader *, unsigned int, | |
96 | cpp_hashnode *)); | |
e31c7eec | 97 | \f |
3b304f5b | 98 | const char * |
0e5921e8 | 99 | init_c_lex (filename) |
3b304f5b | 100 | const char *filename; |
e3d1fd32 | 101 | { |
b61c5ed0 | 102 | struct cpp_callbacks *cb; |
0e5921e8 ZW |
103 | struct c_fileinfo *toplevel; |
104 | ||
105 | /* Set up filename timing. Must happen before cpp_start_read. */ | |
106 | file_info_tree = splay_tree_new ((splay_tree_compare_fn)strcmp, | |
107 | 0, | |
108 | (splay_tree_delete_value_fn)free); | |
a8a05998 | 109 | toplevel = get_fileinfo ("<top level>"); |
0e5921e8 ZW |
110 | if (flag_detailed_statistics) |
111 | { | |
112 | header_time = 0; | |
113 | body_time = get_run_time (); | |
114 | toplevel->time = body_time; | |
115 | } | |
116 | ||
117 | #ifdef MULTIBYTE_CHARS | |
118 | /* Change to the native locale for multibyte conversions. */ | |
119 | setlocale (LC_CTYPE, ""); | |
120 | GET_ENVIRONMENT (literal_codeset, "LANG"); | |
121 | #endif | |
122 | ||
b61c5ed0 NB |
123 | cb = cpp_get_callbacks (parse_in); |
124 | ||
125 | cb->ident = cb_ident; | |
126 | cb->file_change = cb_file_change; | |
127 | cb->def_pragma = cb_def_pragma; | |
0e5921e8 | 128 | |
65289a3a NB |
129 | /* Set the debug callbacks if we can use them. */ |
130 | if (debug_info_level == DINFO_LEVEL_VERBOSE | |
131 | && (write_symbols == DWARF_DEBUG || write_symbols == DWARF2_DEBUG)) | |
132 | { | |
b61c5ed0 NB |
133 | cb->define = cb_define; |
134 | cb->undef = cb_undef; | |
65289a3a NB |
135 | } |
136 | ||
373e2177 | 137 | |
b12da25e | 138 | if (filename == 0 || !strcmp (filename, "-")) |
373e2177 NB |
139 | filename = "stdin", cpp_filename = ""; |
140 | else | |
141 | cpp_filename = filename; | |
5c60e5c0 | 142 | |
851ef036 NB |
143 | /* Start it at 0. */ |
144 | lineno = 0; | |
b12da25e | 145 | |
5c60e5c0 | 146 | return filename; |
e3d1fd32 PB |
147 | } |
148 | ||
3aac38d7 RH |
149 | /* A thin wrapper around the real parser that initializes the |
150 | integrated preprocessor after debug output has been initialized. */ | |
151 | ||
152 | int | |
153 | yyparse() | |
154 | { | |
373e2177 | 155 | if (! cpp_start_read (parse_in, cpp_filename)) |
3aac38d7 RH |
156 | return 1; /* cpplib has emitted an error. */ |
157 | ||
158 | return yyparse_1(); | |
159 | } | |
160 | ||
0e5921e8 ZW |
161 | struct c_fileinfo * |
162 | get_fileinfo (name) | |
163 | const char *name; | |
e3d1fd32 | 164 | { |
0e5921e8 ZW |
165 | splay_tree_node n; |
166 | struct c_fileinfo *fi; | |
167 | ||
168 | n = splay_tree_lookup (file_info_tree, (splay_tree_key) name); | |
169 | if (n) | |
170 | return (struct c_fileinfo *) n->value; | |
171 | ||
172 | fi = (struct c_fileinfo *) xmalloc (sizeof (struct c_fileinfo)); | |
173 | fi->time = 0; | |
174 | fi->interface_only = 0; | |
175 | fi->interface_unknown = 1; | |
176 | splay_tree_insert (file_info_tree, (splay_tree_key) name, | |
177 | (splay_tree_value) fi); | |
178 | return fi; | |
e56e519d | 179 | } |
e3d1fd32 | 180 | |
0e5921e8 ZW |
181 | static void |
182 | update_header_times (name) | |
183 | const char *name; | |
e8bbfc4e | 184 | { |
0e5921e8 ZW |
185 | /* Changing files again. This means currently collected time |
186 | is charged against header time, and body time starts back at 0. */ | |
187 | if (flag_detailed_statistics) | |
e8bbfc4e | 188 | { |
0e5921e8 ZW |
189 | int this_time = get_run_time (); |
190 | struct c_fileinfo *file = get_fileinfo (name); | |
191 | header_time += this_time - body_time; | |
192 | file->time += this_time - body_time; | |
193 | body_time = this_time; | |
e8bbfc4e RK |
194 | } |
195 | } | |
196 | ||
0e5921e8 ZW |
197 | static int |
198 | dump_one_header (n, dummy) | |
199 | splay_tree_node n; | |
200 | void *dummy ATTRIBUTE_UNUSED; | |
e8bbfc4e | 201 | { |
0e5921e8 ZW |
202 | print_time ((const char *) n->key, |
203 | ((struct c_fileinfo *) n->value)->time); | |
204 | return 0; | |
e8bbfc4e | 205 | } |
e8bbfc4e RK |
206 | |
207 | void | |
0e5921e8 | 208 | dump_time_statistics () |
e8bbfc4e | 209 | { |
0e5921e8 ZW |
210 | struct c_fileinfo *file = get_fileinfo (input_filename); |
211 | int this_time = get_run_time (); | |
212 | file->time += this_time - body_time; | |
213 | ||
214 | fprintf (stderr, "\n******\n"); | |
215 | print_time ("header files (total)", header_time); | |
216 | print_time ("main file (total)", this_time - body_time); | |
217 | fprintf (stderr, "ratio = %g : 1\n", | |
218 | (double)header_time / (double)(this_time - body_time)); | |
219 | fprintf (stderr, "\n******\n"); | |
220 | ||
221 | splay_tree_foreach (file_info_tree, dump_one_header, 0); | |
e8bbfc4e | 222 | } |
a6124a42 | 223 | |
27e2564a NB |
224 | /* Not yet handled: #pragma, #define, #undef. |
225 | No need to deal with linemarkers under normal conditions. */ | |
226 | ||
0e5921e8 | 227 | static void |
8bbbef34 | 228 | cb_ident (pfile, line, str) |
27e2564a | 229 | cpp_reader *pfile ATTRIBUTE_UNUSED; |
8bbbef34 | 230 | unsigned int line ATTRIBUTE_UNUSED; |
f5720527 | 231 | const cpp_string *str ATTRIBUTE_UNUSED; |
0e5921e8 | 232 | { |
0e5921e8 | 233 | #ifdef ASM_OUTPUT_IDENT |
27e2564a | 234 | if (! flag_no_ident) |
0e5921e8 | 235 | { |
27e2564a NB |
236 | /* Convert escapes in the string. */ |
237 | tree value = lex_string ((const char *)str->text, str->len, 0); | |
238 | ASM_OUTPUT_IDENT (asm_out_file, TREE_STRING_POINTER (value)); | |
0e5921e8 ZW |
239 | } |
240 | #endif | |
27e2564a NB |
241 | } |
242 | ||
243 | static void | |
eb1f4d9d | 244 | cb_file_change (pfile, fc) |
27e2564a NB |
245 | cpp_reader *pfile ATTRIBUTE_UNUSED; |
246 | const cpp_file_change *fc; | |
247 | { | |
d82fc108 NB |
248 | unsigned int from_line = SOURCE_LINE (fc->map - 1, fc->line - 1); |
249 | ||
250 | if (fc->reason == LC_ENTER) | |
fbb18613 | 251 | { |
5bea1ccf JM |
252 | /* Don't stack the main buffer on the input stack; |
253 | we already did in compile_file. */ | |
d82fc108 NB |
254 | if (MAIN_FILE_P (fc->map)) |
255 | main_input_filename = fc->map->to_file; | |
256 | else | |
0e5921e8 | 257 | { |
d82fc108 NB |
258 | lineno = from_line; |
259 | push_srcloc (fc->map->to_file, 1); | |
27e2564a | 260 | input_file_stack->indent_level = indent_level; |
d82fc108 | 261 | (*debug_hooks->start_source_file) (lineno, fc->map->to_file); |
27e2564a NB |
262 | #ifndef NO_IMPLICIT_EXTERN_C |
263 | if (c_header_level) | |
264 | ++c_header_level; | |
265 | else if (fc->externc) | |
266 | { | |
267 | c_header_level = 1; | |
268 | ++pending_lang_change; | |
269 | } | |
0e5921e8 | 270 | #endif |
27e2564a | 271 | } |
fbb18613 | 272 | } |
d82fc108 | 273 | else if (fc->reason == LC_LEAVE) |
fbb18613 JM |
274 | { |
275 | /* Popping out of a file. */ | |
276 | if (input_file_stack->next) | |
0468bc75 | 277 | { |
0e5921e8 ZW |
278 | #ifndef NO_IMPLICIT_EXTERN_C |
279 | if (c_header_level && --c_header_level == 0) | |
280 | { | |
27e2564a | 281 | if (fc->externc) |
0e5921e8 ZW |
282 | warning ("badly nested C headers from preprocessor"); |
283 | --pending_lang_change; | |
284 | } | |
285 | #endif | |
286 | #if 0 | |
287 | if (indent_level != input_file_stack->indent_level) | |
fbb18613 JM |
288 | { |
289 | warning_with_file_and_line | |
5bea1ccf | 290 | (input_filename, lineno, |
0e5921e8 ZW |
291 | "This file contains more '%c's than '%c's.", |
292 | indent_level > input_file_stack->indent_level ? '{' : '}', | |
293 | indent_level > input_file_stack->indent_level ? '}' : '{'); | |
fbb18613 | 294 | } |
0e5921e8 ZW |
295 | #endif |
296 | pop_srcloc (); | |
d82fc108 | 297 | (*debug_hooks->end_source_file) (from_line); |
0468bc75 | 298 | } |
fbb18613 | 299 | else |
27e2564a | 300 | error ("leaving more files than we entered"); |
e8bbfc4e | 301 | } |
fbb18613 | 302 | |
d82fc108 | 303 | update_header_times (fc->map->to_file); |
665ad678 | 304 | in_system_header = fc->sysp != 0; |
d82fc108 NB |
305 | input_filename = fc->map->to_file; |
306 | lineno = SOURCE_LINE (fc->map, fc->line); /* Do we need this? */ | |
0e5921e8 | 307 | |
0e5921e8 ZW |
308 | /* Hook for C++. */ |
309 | extract_interface_info (); | |
310 | } | |
8b97c5f8 ZW |
311 | |
312 | static void | |
8bbbef34 | 313 | cb_def_pragma (pfile, line) |
8b97c5f8 | 314 | cpp_reader *pfile; |
8bbbef34 | 315 | unsigned int line ATTRIBUTE_UNUSED; |
8b97c5f8 ZW |
316 | { |
317 | /* Issue a warning message if we have been asked to do so. Ignore | |
318 | unknown pragmas in system headers unless an explicit | |
ec5c56db | 319 | -Wunknown-pragmas has been given. */ |
8b97c5f8 ZW |
320 | if (warn_unknown_pragmas > in_system_header) |
321 | { | |
23356f93 ZW |
322 | const unsigned char *space, *name = 0; |
323 | cpp_token s; | |
324 | ||
325 | cpp_get_token (pfile, &s); | |
326 | space = cpp_token_as_text (pfile, &s); | |
327 | cpp_get_token (pfile, &s); | |
328 | if (s.type == CPP_NAME) | |
329 | name = cpp_token_as_text (pfile, &s); | |
8b97c5f8 | 330 | |
851ef036 | 331 | lineno = cpp_get_line (parse_in)->line; |
8b97c5f8 ZW |
332 | if (name) |
333 | warning ("ignoring #pragma %s %s", space, name); | |
334 | else | |
335 | warning ("ignoring #pragma %s", space); | |
336 | } | |
337 | } | |
0e5921e8 | 338 | |
65289a3a NB |
339 | /* #define callback for DWARF and DWARF2 debug info. */ |
340 | static void | |
8bbbef34 | 341 | cb_define (pfile, line, node) |
65289a3a | 342 | cpp_reader *pfile; |
8bbbef34 | 343 | unsigned int line ATTRIBUTE_UNUSED; |
65289a3a NB |
344 | cpp_hashnode *node; |
345 | { | |
7f905405 NB |
346 | (*debug_hooks->define) (cpp_get_line (pfile)->line, |
347 | (const char *) cpp_macro_definition (pfile, node)); | |
65289a3a NB |
348 | } |
349 | ||
350 | /* #undef callback for DWARF and DWARF2 debug info. */ | |
351 | static void | |
8bbbef34 | 352 | cb_undef (pfile, line, node) |
7f905405 | 353 | cpp_reader *pfile; |
8bbbef34 | 354 | unsigned int line ATTRIBUTE_UNUSED; |
65289a3a NB |
355 | cpp_hashnode *node; |
356 | { | |
7f905405 NB |
357 | (*debug_hooks->undef) (cpp_get_line (pfile)->line, |
358 | (const char *) NODE_NAME (node)); | |
65289a3a NB |
359 | } |
360 | ||
0e5921e8 ZW |
361 | #if 0 /* not yet */ |
362 | /* Returns nonzero if C is a universal-character-name. Give an error if it | |
363 | is not one which may appear in an identifier, as per [extendid]. | |
364 | ||
365 | Note that extended character support in identifiers has not yet been | |
366 | implemented. It is my personal opinion that this is not a desirable | |
367 | feature. Portable code cannot count on support for more than the basic | |
368 | identifier character set. */ | |
369 | ||
370 | static inline int | |
371 | is_extended_char (c) | |
372 | int c; | |
373 | { | |
374 | #ifdef TARGET_EBCDIC | |
375 | return 0; | |
376 | #else | |
377 | /* ASCII. */ | |
378 | if (c < 0x7f) | |
379 | return 0; | |
380 | ||
381 | /* None of the valid chars are outside the Basic Multilingual Plane (the | |
382 | low 16 bits). */ | |
383 | if (c > 0xffff) | |
384 | { | |
385 | error ("universal-character-name '\\U%08x' not valid in identifier", c); | |
386 | return 1; | |
387 | } | |
388 | ||
389 | /* Latin */ | |
390 | if ((c >= 0x00c0 && c <= 0x00d6) | |
391 | || (c >= 0x00d8 && c <= 0x00f6) | |
392 | || (c >= 0x00f8 && c <= 0x01f5) | |
393 | || (c >= 0x01fa && c <= 0x0217) | |
394 | || (c >= 0x0250 && c <= 0x02a8) | |
395 | || (c >= 0x1e00 && c <= 0x1e9a) | |
396 | || (c >= 0x1ea0 && c <= 0x1ef9)) | |
397 | return 1; | |
398 | ||
399 | /* Greek */ | |
400 | if ((c == 0x0384) | |
401 | || (c >= 0x0388 && c <= 0x038a) | |
402 | || (c == 0x038c) | |
403 | || (c >= 0x038e && c <= 0x03a1) | |
404 | || (c >= 0x03a3 && c <= 0x03ce) | |
405 | || (c >= 0x03d0 && c <= 0x03d6) | |
406 | || (c == 0x03da) | |
407 | || (c == 0x03dc) | |
408 | || (c == 0x03de) | |
409 | || (c == 0x03e0) | |
410 | || (c >= 0x03e2 && c <= 0x03f3) | |
411 | || (c >= 0x1f00 && c <= 0x1f15) | |
412 | || (c >= 0x1f18 && c <= 0x1f1d) | |
413 | || (c >= 0x1f20 && c <= 0x1f45) | |
414 | || (c >= 0x1f48 && c <= 0x1f4d) | |
415 | || (c >= 0x1f50 && c <= 0x1f57) | |
416 | || (c == 0x1f59) | |
417 | || (c == 0x1f5b) | |
418 | || (c == 0x1f5d) | |
419 | || (c >= 0x1f5f && c <= 0x1f7d) | |
420 | || (c >= 0x1f80 && c <= 0x1fb4) | |
421 | || (c >= 0x1fb6 && c <= 0x1fbc) | |
422 | || (c >= 0x1fc2 && c <= 0x1fc4) | |
423 | || (c >= 0x1fc6 && c <= 0x1fcc) | |
424 | || (c >= 0x1fd0 && c <= 0x1fd3) | |
425 | || (c >= 0x1fd6 && c <= 0x1fdb) | |
426 | || (c >= 0x1fe0 && c <= 0x1fec) | |
427 | || (c >= 0x1ff2 && c <= 0x1ff4) | |
428 | || (c >= 0x1ff6 && c <= 0x1ffc)) | |
429 | return 1; | |
430 | ||
431 | /* Cyrillic */ | |
432 | if ((c >= 0x0401 && c <= 0x040d) | |
433 | || (c >= 0x040f && c <= 0x044f) | |
434 | || (c >= 0x0451 && c <= 0x045c) | |
435 | || (c >= 0x045e && c <= 0x0481) | |
436 | || (c >= 0x0490 && c <= 0x04c4) | |
437 | || (c >= 0x04c7 && c <= 0x04c8) | |
438 | || (c >= 0x04cb && c <= 0x04cc) | |
439 | || (c >= 0x04d0 && c <= 0x04eb) | |
440 | || (c >= 0x04ee && c <= 0x04f5) | |
441 | || (c >= 0x04f8 && c <= 0x04f9)) | |
442 | return 1; | |
443 | ||
444 | /* Armenian */ | |
445 | if ((c >= 0x0531 && c <= 0x0556) | |
446 | || (c >= 0x0561 && c <= 0x0587)) | |
447 | return 1; | |
448 | ||
449 | /* Hebrew */ | |
450 | if ((c >= 0x05d0 && c <= 0x05ea) | |
451 | || (c >= 0x05f0 && c <= 0x05f4)) | |
452 | return 1; | |
453 | ||
454 | /* Arabic */ | |
455 | if ((c >= 0x0621 && c <= 0x063a) | |
456 | || (c >= 0x0640 && c <= 0x0652) | |
457 | || (c >= 0x0670 && c <= 0x06b7) | |
458 | || (c >= 0x06ba && c <= 0x06be) | |
459 | || (c >= 0x06c0 && c <= 0x06ce) | |
460 | || (c >= 0x06e5 && c <= 0x06e7)) | |
461 | return 1; | |
462 | ||
463 | /* Devanagari */ | |
464 | if ((c >= 0x0905 && c <= 0x0939) | |
465 | || (c >= 0x0958 && c <= 0x0962)) | |
466 | return 1; | |
467 | ||
468 | /* Bengali */ | |
469 | if ((c >= 0x0985 && c <= 0x098c) | |
470 | || (c >= 0x098f && c <= 0x0990) | |
471 | || (c >= 0x0993 && c <= 0x09a8) | |
472 | || (c >= 0x09aa && c <= 0x09b0) | |
473 | || (c == 0x09b2) | |
474 | || (c >= 0x09b6 && c <= 0x09b9) | |
475 | || (c >= 0x09dc && c <= 0x09dd) | |
476 | || (c >= 0x09df && c <= 0x09e1) | |
477 | || (c >= 0x09f0 && c <= 0x09f1)) | |
478 | return 1; | |
479 | ||
480 | /* Gurmukhi */ | |
481 | if ((c >= 0x0a05 && c <= 0x0a0a) | |
482 | || (c >= 0x0a0f && c <= 0x0a10) | |
483 | || (c >= 0x0a13 && c <= 0x0a28) | |
484 | || (c >= 0x0a2a && c <= 0x0a30) | |
485 | || (c >= 0x0a32 && c <= 0x0a33) | |
486 | || (c >= 0x0a35 && c <= 0x0a36) | |
487 | || (c >= 0x0a38 && c <= 0x0a39) | |
488 | || (c >= 0x0a59 && c <= 0x0a5c) | |
489 | || (c == 0x0a5e)) | |
490 | return 1; | |
491 | ||
492 | /* Gujarati */ | |
493 | if ((c >= 0x0a85 && c <= 0x0a8b) | |
494 | || (c == 0x0a8d) | |
495 | || (c >= 0x0a8f && c <= 0x0a91) | |
496 | || (c >= 0x0a93 && c <= 0x0aa8) | |
497 | || (c >= 0x0aaa && c <= 0x0ab0) | |
498 | || (c >= 0x0ab2 && c <= 0x0ab3) | |
499 | || (c >= 0x0ab5 && c <= 0x0ab9) | |
500 | || (c == 0x0ae0)) | |
501 | return 1; | |
502 | ||
503 | /* Oriya */ | |
504 | if ((c >= 0x0b05 && c <= 0x0b0c) | |
505 | || (c >= 0x0b0f && c <= 0x0b10) | |
506 | || (c >= 0x0b13 && c <= 0x0b28) | |
507 | || (c >= 0x0b2a && c <= 0x0b30) | |
508 | || (c >= 0x0b32 && c <= 0x0b33) | |
509 | || (c >= 0x0b36 && c <= 0x0b39) | |
510 | || (c >= 0x0b5c && c <= 0x0b5d) | |
511 | || (c >= 0x0b5f && c <= 0x0b61)) | |
512 | return 1; | |
513 | ||
514 | /* Tamil */ | |
515 | if ((c >= 0x0b85 && c <= 0x0b8a) | |
516 | || (c >= 0x0b8e && c <= 0x0b90) | |
517 | || (c >= 0x0b92 && c <= 0x0b95) | |
518 | || (c >= 0x0b99 && c <= 0x0b9a) | |
519 | || (c == 0x0b9c) | |
520 | || (c >= 0x0b9e && c <= 0x0b9f) | |
521 | || (c >= 0x0ba3 && c <= 0x0ba4) | |
522 | || (c >= 0x0ba8 && c <= 0x0baa) | |
523 | || (c >= 0x0bae && c <= 0x0bb5) | |
524 | || (c >= 0x0bb7 && c <= 0x0bb9)) | |
525 | return 1; | |
526 | ||
527 | /* Telugu */ | |
528 | if ((c >= 0x0c05 && c <= 0x0c0c) | |
529 | || (c >= 0x0c0e && c <= 0x0c10) | |
530 | || (c >= 0x0c12 && c <= 0x0c28) | |
531 | || (c >= 0x0c2a && c <= 0x0c33) | |
532 | || (c >= 0x0c35 && c <= 0x0c39) | |
533 | || (c >= 0x0c60 && c <= 0x0c61)) | |
534 | return 1; | |
535 | ||
536 | /* Kannada */ | |
537 | if ((c >= 0x0c85 && c <= 0x0c8c) | |
538 | || (c >= 0x0c8e && c <= 0x0c90) | |
539 | || (c >= 0x0c92 && c <= 0x0ca8) | |
540 | || (c >= 0x0caa && c <= 0x0cb3) | |
541 | || (c >= 0x0cb5 && c <= 0x0cb9) | |
542 | || (c >= 0x0ce0 && c <= 0x0ce1)) | |
543 | return 1; | |
544 | ||
545 | /* Malayalam */ | |
546 | if ((c >= 0x0d05 && c <= 0x0d0c) | |
547 | || (c >= 0x0d0e && c <= 0x0d10) | |
548 | || (c >= 0x0d12 && c <= 0x0d28) | |
549 | || (c >= 0x0d2a && c <= 0x0d39) | |
550 | || (c >= 0x0d60 && c <= 0x0d61)) | |
551 | return 1; | |
552 | ||
553 | /* Thai */ | |
554 | if ((c >= 0x0e01 && c <= 0x0e30) | |
555 | || (c >= 0x0e32 && c <= 0x0e33) | |
556 | || (c >= 0x0e40 && c <= 0x0e46) | |
557 | || (c >= 0x0e4f && c <= 0x0e5b)) | |
558 | return 1; | |
559 | ||
560 | /* Lao */ | |
561 | if ((c >= 0x0e81 && c <= 0x0e82) | |
562 | || (c == 0x0e84) | |
563 | || (c == 0x0e87) | |
564 | || (c == 0x0e88) | |
565 | || (c == 0x0e8a) | |
566 | || (c == 0x0e0d) | |
567 | || (c >= 0x0e94 && c <= 0x0e97) | |
568 | || (c >= 0x0e99 && c <= 0x0e9f) | |
569 | || (c >= 0x0ea1 && c <= 0x0ea3) | |
570 | || (c == 0x0ea5) | |
571 | || (c == 0x0ea7) | |
572 | || (c == 0x0eaa) | |
573 | || (c == 0x0eab) | |
574 | || (c >= 0x0ead && c <= 0x0eb0) | |
575 | || (c == 0x0eb2) | |
576 | || (c == 0x0eb3) | |
577 | || (c == 0x0ebd) | |
578 | || (c >= 0x0ec0 && c <= 0x0ec4) | |
579 | || (c == 0x0ec6)) | |
580 | return 1; | |
581 | ||
582 | /* Georgian */ | |
583 | if ((c >= 0x10a0 && c <= 0x10c5) | |
584 | || (c >= 0x10d0 && c <= 0x10f6)) | |
585 | return 1; | |
586 | ||
587 | /* Hiragana */ | |
588 | if ((c >= 0x3041 && c <= 0x3094) | |
589 | || (c >= 0x309b && c <= 0x309e)) | |
590 | return 1; | |
591 | ||
592 | /* Katakana */ | |
593 | if ((c >= 0x30a1 && c <= 0x30fe)) | |
594 | return 1; | |
595 | ||
596 | /* Bopmofo */ | |
597 | if ((c >= 0x3105 && c <= 0x312c)) | |
598 | return 1; | |
599 | ||
600 | /* Hangul */ | |
601 | if ((c >= 0x1100 && c <= 0x1159) | |
602 | || (c >= 0x1161 && c <= 0x11a2) | |
603 | || (c >= 0x11a8 && c <= 0x11f9)) | |
604 | return 1; | |
605 | ||
606 | /* CJK Unified Ideographs */ | |
607 | if ((c >= 0xf900 && c <= 0xfa2d) | |
608 | || (c >= 0xfb1f && c <= 0xfb36) | |
609 | || (c >= 0xfb38 && c <= 0xfb3c) | |
610 | || (c == 0xfb3e) | |
611 | || (c >= 0xfb40 && c <= 0xfb41) | |
612 | || (c >= 0xfb42 && c <= 0xfb44) | |
613 | || (c >= 0xfb46 && c <= 0xfbb1) | |
614 | || (c >= 0xfbd3 && c <= 0xfd3f) | |
615 | || (c >= 0xfd50 && c <= 0xfd8f) | |
616 | || (c >= 0xfd92 && c <= 0xfdc7) | |
617 | || (c >= 0xfdf0 && c <= 0xfdfb) | |
618 | || (c >= 0xfe70 && c <= 0xfe72) | |
619 | || (c == 0xfe74) | |
620 | || (c >= 0xfe76 && c <= 0xfefc) | |
621 | || (c >= 0xff21 && c <= 0xff3a) | |
622 | || (c >= 0xff41 && c <= 0xff5a) | |
623 | || (c >= 0xff66 && c <= 0xffbe) | |
624 | || (c >= 0xffc2 && c <= 0xffc7) | |
625 | || (c >= 0xffca && c <= 0xffcf) | |
626 | || (c >= 0xffd2 && c <= 0xffd7) | |
627 | || (c >= 0xffda && c <= 0xffdc) | |
628 | || (c >= 0x4e00 && c <= 0x9fa5)) | |
629 | return 1; | |
630 | ||
631 | error ("universal-character-name '\\u%04x' not valid in identifier", c); | |
632 | return 1; | |
633 | #endif | |
634 | } | |
635 | ||
636 | /* Add the UTF-8 representation of C to the token_buffer. */ | |
637 | ||
638 | static void | |
639 | utf8_extend_token (c) | |
640 | int c; | |
e8bbfc4e | 641 | { |
0e5921e8 ZW |
642 | int shift, mask; |
643 | ||
644 | if (c <= 0x0000007f) | |
645 | { | |
646 | extend_token (c); | |
647 | return; | |
648 | } | |
649 | else if (c <= 0x000007ff) | |
650 | shift = 6, mask = 0xc0; | |
651 | else if (c <= 0x0000ffff) | |
652 | shift = 12, mask = 0xe0; | |
653 | else if (c <= 0x001fffff) | |
654 | shift = 18, mask = 0xf0; | |
655 | else if (c <= 0x03ffffff) | |
656 | shift = 24, mask = 0xf8; | |
e8bbfc4e | 657 | else |
0e5921e8 ZW |
658 | shift = 30, mask = 0xfc; |
659 | ||
660 | extend_token (mask | (c >> shift)); | |
661 | do | |
662 | { | |
663 | shift -= 6; | |
664 | extend_token ((unsigned char) (0x80 | (c >> shift))); | |
665 | } | |
666 | while (shift); | |
e8bbfc4e | 667 | } |
0e5921e8 | 668 | #endif |
e8bbfc4e RK |
669 | |
670 | #if 0 | |
e8bbfc4e RK |
671 | struct try_type |
672 | { | |
673 | tree *node_var; | |
674 | char unsigned_flag; | |
675 | char long_flag; | |
676 | char long_long_flag; | |
677 | }; | |
678 | ||
75cb8865 | 679 | struct try_type type_sequence[] = |
e8bbfc4e RK |
680 | { |
681 | { &integer_type_node, 0, 0, 0}, | |
682 | { &unsigned_type_node, 1, 0, 0}, | |
683 | { &long_integer_type_node, 0, 1, 0}, | |
684 | { &long_unsigned_type_node, 1, 1, 0}, | |
685 | { &long_long_integer_type_node, 0, 1, 1}, | |
686 | { &long_long_unsigned_type_node, 1, 1, 1} | |
687 | }; | |
688 | #endif /* 0 */ | |
689 | \f | |
ed513abf KG |
690 | struct pf_args |
691 | { | |
692 | /* Input */ | |
0e5921e8 ZW |
693 | const char *str; |
694 | int fflag; | |
695 | int lflag; | |
ed513abf | 696 | int base; |
fbb18613 | 697 | /* Output */ |
ed513abf | 698 | int conversion_errno; |
ed513abf | 699 | REAL_VALUE_TYPE value; |
0e5921e8 | 700 | tree type; |
ed513abf KG |
701 | }; |
702 | ||
703 | static void | |
704 | parse_float (data) | |
705 | PTR data; | |
706 | { | |
707 | struct pf_args * args = (struct pf_args *) data; | |
0e5921e8 ZW |
708 | const char *typename; |
709 | ||
fbb18613 JM |
710 | args->conversion_errno = 0; |
711 | args->type = double_type_node; | |
0e5921e8 | 712 | typename = "double"; |
ed513abf KG |
713 | |
714 | /* The second argument, machine_mode, of REAL_VALUE_ATOF | |
715 | tells the desired precision of the binary result | |
716 | of decimal-to-binary conversion. */ | |
717 | ||
0e5921e8 | 718 | if (args->fflag) |
ed513abf | 719 | { |
0e5921e8 ZW |
720 | if (args->lflag) |
721 | error ("both 'f' and 'l' suffixes on floating constant"); | |
ed513abf KG |
722 | |
723 | args->type = float_type_node; | |
0e5921e8 | 724 | typename = "float"; |
ed513abf | 725 | } |
0e5921e8 | 726 | else if (args->lflag) |
ed513abf KG |
727 | { |
728 | args->type = long_double_type_node; | |
0e5921e8 | 729 | typename = "long double"; |
ed513abf | 730 | } |
0e5921e8 | 731 | else if (flag_single_precision_constant) |
ed513abf | 732 | { |
0e5921e8 ZW |
733 | args->type = float_type_node; |
734 | typename = "float"; | |
ed513abf | 735 | } |
0e5921e8 ZW |
736 | |
737 | errno = 0; | |
738 | if (args->base == 16) | |
739 | args->value = REAL_VALUE_HTOF (args->str, TYPE_MODE (args->type)); | |
740 | else | |
741 | args->value = REAL_VALUE_ATOF (args->str, TYPE_MODE (args->type)); | |
742 | ||
743 | args->conversion_errno = errno; | |
744 | /* A diagnostic is required here by some ISO C testsuites. | |
745 | This is not pedwarn, because some people don't want | |
746 | an error for this. */ | |
747 | if (REAL_VALUE_ISINF (args->value) && pedantic) | |
748 | warning ("floating point number exceeds range of '%s'", typename); | |
ed513abf KG |
749 | } |
750 | ||
0e5921e8 ZW |
751 | int |
752 | c_lex (value) | |
753 | tree *value; | |
fbb18613 | 754 | { |
23356f93 | 755 | cpp_token tok; |
0e5921e8 ZW |
756 | enum cpp_ttype type; |
757 | ||
758 | retry: | |
759 | timevar_push (TV_CPP); | |
cf44ea52 | 760 | cpp_get_token (parse_in, &tok); |
0e5921e8 ZW |
761 | timevar_pop (TV_CPP); |
762 | ||
763 | /* The C++ front end does horrible things with the current line | |
764 | number. To ensure an accurate line number, we must reset it | |
23356f93 | 765 | every time we return a token. */ |
851ef036 | 766 | lineno = cpp_get_line (parse_in)->line; |
0e5921e8 ZW |
767 | |
768 | *value = NULL_TREE; | |
23356f93 | 769 | type = tok.type; |
0e5921e8 ZW |
770 | switch (type) |
771 | { | |
772 | case CPP_OPEN_BRACE: indent_level++; break; | |
773 | case CPP_CLOSE_BRACE: indent_level--; break; | |
774 | ||
6c53ebff | 775 | /* Issue this error here, where we can get at tok.val.c. */ |
0e5921e8 | 776 | case CPP_OTHER: |
6c53ebff NB |
777 | if (ISGRAPH (tok.val.c)) |
778 | error ("stray '%c' in program", tok.val.c); | |
0e5921e8 | 779 | else |
5677efb0 | 780 | error ("stray '\\%o' in program", tok.val.c); |
0e5921e8 ZW |
781 | goto retry; |
782 | ||
0e5921e8 | 783 | case CPP_NAME: |
083e9f92 | 784 | *value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok.val.node)); |
0e5921e8 | 785 | break; |
fbb18613 | 786 | |
0e5921e8 | 787 | case CPP_NUMBER: |
23356f93 | 788 | *value = lex_number ((const char *)tok.val.str.text, tok.val.str.len); |
0e5921e8 | 789 | break; |
93868d11 | 790 | |
0e5921e8 ZW |
791 | case CPP_CHAR: |
792 | case CPP_WCHAR: | |
c8a96070 | 793 | *value = lex_charconst (&tok); |
0e5921e8 | 794 | break; |
fbb18613 | 795 | |
0e5921e8 ZW |
796 | case CPP_STRING: |
797 | case CPP_WSTRING: | |
23356f93 ZW |
798 | *value = lex_string ((const char *)tok.val.str.text, |
799 | tok.val.str.len, tok.type == CPP_WSTRING); | |
0e5921e8 | 800 | break; |
fbb18613 | 801 | |
0e5921e8 ZW |
802 | /* These tokens should not be visible outside cpplib. */ |
803 | case CPP_HEADER_NAME: | |
804 | case CPP_COMMENT: | |
805 | case CPP_MACRO_ARG: | |
0e5921e8 ZW |
806 | abort (); |
807 | ||
808 | default: break; | |
809 | } | |
810 | ||
811 | return type; | |
0e5921e8 | 812 | } |
8d9bfdc5 | 813 | |
0e5921e8 | 814 | #define ERROR(msgid) do { error(msgid); goto syntax_error; } while(0) |
75cb8865 | 815 | |
0e5921e8 ZW |
816 | static tree |
817 | lex_number (str, len) | |
818 | const char *str; | |
819 | unsigned int len; | |
820 | { | |
821 | int base = 10; | |
822 | int count = 0; | |
823 | int largest_digit = 0; | |
824 | int numdigits = 0; | |
825 | int overflow = 0; | |
826 | int c; | |
827 | tree value; | |
828 | const char *p; | |
829 | enum anon1 { NOT_FLOAT = 0, AFTER_POINT, AFTER_EXPON } floatflag = NOT_FLOAT; | |
830 | ||
831 | /* We actually store only HOST_BITS_PER_CHAR bits in each part. | |
832 | The code below which fills the parts array assumes that a host | |
833 | int is at least twice as wide as a host char, and that | |
834 | HOST_BITS_PER_WIDE_INT is an even multiple of HOST_BITS_PER_CHAR. | |
835 | Two HOST_WIDE_INTs is the largest int literal we can store. | |
836 | In order to detect overflow below, the number of parts (TOTAL_PARTS) | |
837 | must be exactly the number of parts needed to hold the bits | |
ec5c56db | 838 | of two HOST_WIDE_INTs. */ |
0e5921e8 ZW |
839 | #define TOTAL_PARTS ((HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR) * 2) |
840 | unsigned int parts[TOTAL_PARTS]; | |
841 | ||
842 | /* Optimize for most frequent case. */ | |
843 | if (len == 1) | |
844 | { | |
845 | if (*str == '0') | |
846 | return integer_zero_node; | |
847 | else if (*str == '1') | |
848 | return integer_one_node; | |
849 | else | |
850 | return build_int_2 (*str - '0', 0); | |
851 | } | |
e8bbfc4e | 852 | |
0e5921e8 ZW |
853 | for (count = 0; count < TOTAL_PARTS; count++) |
854 | parts[count] = 0; | |
e8bbfc4e | 855 | |
0e5921e8 ZW |
856 | /* len is known to be >1 at this point. */ |
857 | p = str; | |
e8bbfc4e | 858 | |
0e5921e8 ZW |
859 | if (len > 2 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X')) |
860 | { | |
861 | base = 16; | |
862 | p = str + 2; | |
863 | } | |
864 | /* The ISDIGIT check is so we are not confused by a suffix on 0. */ | |
865 | else if (str[0] == '0' && ISDIGIT (str[1])) | |
866 | { | |
867 | base = 8; | |
868 | p = str + 1; | |
869 | } | |
e8bbfc4e | 870 | |
0e5921e8 ZW |
871 | do |
872 | { | |
873 | c = *p++; | |
88d92ca5 | 874 | |
0e5921e8 ZW |
875 | if (c == '.') |
876 | { | |
c215b29f | 877 | if (floatflag == AFTER_POINT) |
0e5921e8 ZW |
878 | ERROR ("too many decimal points in floating constant"); |
879 | else if (floatflag == AFTER_EXPON) | |
880 | ERROR ("decimal point in exponent - impossible!"); | |
881 | else | |
882 | floatflag = AFTER_POINT; | |
c832a30e | 883 | |
0e5921e8 ZW |
884 | if (base == 8) |
885 | base = 10; | |
886 | } | |
887 | else if (c == '_') | |
888 | /* Possible future extension: silently ignore _ in numbers, | |
889 | permitting cosmetic grouping - e.g. 0x8000_0000 == 0x80000000 | |
890 | but somewhat easier to read. Ada has this? */ | |
891 | ERROR ("underscore in number"); | |
892 | else | |
893 | { | |
894 | int n; | |
895 | /* It is not a decimal point. | |
896 | It should be a digit (perhaps a hex digit). */ | |
0e0fda0d | 897 | |
0e5921e8 ZW |
898 | if (ISDIGIT (c)) |
899 | { | |
900 | n = c - '0'; | |
901 | } | |
902 | else if (base <= 10 && (c == 'e' || c == 'E')) | |
903 | { | |
904 | base = 10; | |
905 | floatflag = AFTER_EXPON; | |
906 | break; | |
907 | } | |
908 | else if (base == 16 && (c == 'p' || c == 'P')) | |
909 | { | |
910 | floatflag = AFTER_EXPON; | |
911 | break; /* start of exponent */ | |
912 | } | |
913 | else if (base == 16 && c >= 'a' && c <= 'f') | |
914 | { | |
915 | n = c - 'a' + 10; | |
916 | } | |
917 | else if (base == 16 && c >= 'A' && c <= 'F') | |
918 | { | |
919 | n = c - 'A' + 10; | |
920 | } | |
921 | else | |
922 | { | |
923 | p--; | |
924 | break; /* start of suffix */ | |
925 | } | |
0e0fda0d | 926 | |
0e5921e8 ZW |
927 | if (n >= largest_digit) |
928 | largest_digit = n; | |
929 | numdigits++; | |
0e0fda0d | 930 | |
0e5921e8 ZW |
931 | for (count = 0; count < TOTAL_PARTS; count++) |
932 | { | |
933 | parts[count] *= base; | |
934 | if (count) | |
935 | { | |
936 | parts[count] | |
937 | += (parts[count-1] >> HOST_BITS_PER_CHAR); | |
938 | parts[count-1] | |
939 | &= (1 << HOST_BITS_PER_CHAR) - 1; | |
940 | } | |
941 | else | |
942 | parts[0] += n; | |
943 | } | |
e8bbfc4e | 944 | |
0e5921e8 ZW |
945 | /* If the highest-order part overflows (gets larger than |
946 | a host char will hold) then the whole number has | |
947 | overflowed. Record this and truncate the highest-order | |
ec5c56db | 948 | part. */ |
0e5921e8 ZW |
949 | if (parts[TOTAL_PARTS - 1] >> HOST_BITS_PER_CHAR) |
950 | { | |
951 | overflow = 1; | |
952 | parts[TOTAL_PARTS - 1] &= (1 << HOST_BITS_PER_CHAR) - 1; | |
953 | } | |
954 | } | |
955 | } | |
956 | while (p < str + len); | |
91b0989e | 957 | |
0e5921e8 ZW |
958 | /* This can happen on input like `int i = 0x;' */ |
959 | if (numdigits == 0) | |
960 | ERROR ("numeric constant with no digits"); | |
91b0989e | 961 | |
0e5921e8 ZW |
962 | if (largest_digit >= base) |
963 | ERROR ("numeric constant contains digits beyond the radix"); | |
e8bbfc4e | 964 | |
0e5921e8 ZW |
965 | if (floatflag != NOT_FLOAT) |
966 | { | |
967 | tree type; | |
968 | int imag, fflag, lflag, conversion_errno; | |
969 | REAL_VALUE_TYPE real; | |
970 | struct pf_args args; | |
971 | char *copy; | |
972 | ||
c215b29f JM |
973 | if (base == 16 && pedantic && !flag_isoc99) |
974 | pedwarn ("floating constant may not be in radix 16"); | |
975 | ||
0e5921e8 ZW |
976 | if (base == 16 && floatflag != AFTER_EXPON) |
977 | ERROR ("hexadecimal floating constant has no exponent"); | |
978 | ||
979 | /* Read explicit exponent if any, and put it in tokenbuf. */ | |
980 | if ((base == 10 && ((c == 'e') || (c == 'E'))) | |
981 | || (base == 16 && (c == 'p' || c == 'P'))) | |
982 | { | |
983 | if (p < str + len) | |
984 | c = *p++; | |
985 | if (p < str + len && (c == '+' || c == '-')) | |
986 | c = *p++; | |
987 | /* Exponent is decimal, even if string is a hex float. */ | |
988 | if (! ISDIGIT (c)) | |
989 | ERROR ("floating constant exponent has no digits"); | |
990 | while (p < str + len && ISDIGIT (c)) | |
991 | c = *p++; | |
992 | if (! ISDIGIT (c)) | |
993 | p--; | |
994 | } | |
56f48ce9 | 995 | |
0e5921e8 ZW |
996 | /* Copy the float constant now; we don't want any suffixes in the |
997 | string passed to parse_float. */ | |
998 | copy = alloca (p - str + 1); | |
999 | memcpy (copy, str, p - str); | |
1000 | copy[p - str] = '\0'; | |
e8bbfc4e | 1001 | |
0e5921e8 ZW |
1002 | /* Now parse suffixes. */ |
1003 | fflag = lflag = imag = 0; | |
1004 | while (p < str + len) | |
1005 | switch (*p++) | |
e8bbfc4e | 1006 | { |
0e5921e8 ZW |
1007 | case 'f': case 'F': |
1008 | if (fflag) | |
1009 | ERROR ("more than one 'f' suffix on floating constant"); | |
7065e130 | 1010 | else if (warn_traditional && !in_system_header |
c691145a | 1011 | && ! cpp_sys_macro_p (parse_in)) |
0e5921e8 | 1012 | warning ("traditional C rejects the 'f' suffix"); |
e8bbfc4e | 1013 | |
0e5921e8 ZW |
1014 | fflag = 1; |
1015 | break; | |
e8bbfc4e | 1016 | |
0e5921e8 ZW |
1017 | case 'l': case 'L': |
1018 | if (lflag) | |
1019 | ERROR ("more than one 'l' suffix on floating constant"); | |
7065e130 | 1020 | else if (warn_traditional && !in_system_header |
c691145a | 1021 | && ! cpp_sys_macro_p (parse_in)) |
0e5921e8 | 1022 | warning ("traditional C rejects the 'l' suffix"); |
56f48ce9 | 1023 | |
0e5921e8 ZW |
1024 | lflag = 1; |
1025 | break; | |
e8bbfc4e | 1026 | |
0e5921e8 ZW |
1027 | case 'i': case 'I': |
1028 | case 'j': case 'J': | |
1029 | if (imag) | |
1030 | ERROR ("more than one 'i' or 'j' suffix on floating constant"); | |
1031 | else if (pedantic) | |
1032 | pedwarn ("ISO C forbids imaginary numeric constants"); | |
1033 | imag = 1; | |
1034 | break; | |
e8bbfc4e | 1035 | |
0e5921e8 ZW |
1036 | default: |
1037 | ERROR ("invalid suffix on floating constant"); | |
e8bbfc4e RK |
1038 | } |
1039 | ||
0e5921e8 ZW |
1040 | /* Setup input for parse_float() */ |
1041 | args.str = copy; | |
1042 | args.fflag = fflag; | |
1043 | args.lflag = lflag; | |
1044 | args.base = base; | |
e8bbfc4e | 1045 | |
0e5921e8 ZW |
1046 | /* Convert string to a double, checking for overflow. */ |
1047 | if (do_float_handler (parse_float, (PTR) &args)) | |
1048 | { | |
1049 | /* Receive output from parse_float() */ | |
1050 | real = args.value; | |
1051 | } | |
1052 | else | |
1053 | /* We got an exception from parse_float() */ | |
1054 | ERROR ("floating constant out of range"); | |
e8bbfc4e | 1055 | |
0e5921e8 ZW |
1056 | /* Receive output from parse_float() */ |
1057 | conversion_errno = args.conversion_errno; | |
1058 | type = args.type; | |
1059 | ||
1060 | #ifdef ERANGE | |
1061 | /* ERANGE is also reported for underflow, | |
1062 | so test the value to distinguish overflow from that. */ | |
1063 | if (conversion_errno == ERANGE && !flag_traditional && pedantic | |
1064 | && (REAL_VALUES_LESS (dconst1, real) | |
1065 | || REAL_VALUES_LESS (real, dconstm1))) | |
1066 | warning ("floating point number exceeds range of 'double'"); | |
56f48ce9 | 1067 | #endif |
e8bbfc4e | 1068 | |
0e5921e8 ZW |
1069 | /* Create a node with determined type and value. */ |
1070 | if (imag) | |
1071 | value = build_complex (NULL_TREE, convert (type, integer_zero_node), | |
1072 | build_real (type, real)); | |
1073 | else | |
1074 | value = build_real (type, real); | |
1075 | } | |
1076 | else | |
1077 | { | |
1078 | tree trad_type, ansi_type, type; | |
1079 | HOST_WIDE_INT high, low; | |
1080 | int spec_unsigned = 0; | |
1081 | int spec_long = 0; | |
1082 | int spec_long_long = 0; | |
1083 | int spec_imag = 0; | |
1084 | int suffix_lu = 0; | |
1085 | int warn = 0, i; | |
1086 | ||
1087 | trad_type = ansi_type = type = NULL_TREE; | |
1088 | while (p < str + len) | |
1089 | { | |
1090 | c = *p++; | |
1091 | switch (c) | |
1092 | { | |
1093 | case 'u': case 'U': | |
1094 | if (spec_unsigned) | |
1095 | error ("two 'u' suffixes on integer constant"); | |
7065e130 | 1096 | else if (warn_traditional && !in_system_header |
c691145a | 1097 | && ! cpp_sys_macro_p (parse_in)) |
0e5921e8 ZW |
1098 | warning ("traditional C rejects the 'u' suffix"); |
1099 | ||
1100 | spec_unsigned = 1; | |
1101 | if (spec_long) | |
1102 | suffix_lu = 1; | |
1103 | break; | |
e8bbfc4e | 1104 | |
0e5921e8 ZW |
1105 | case 'l': case 'L': |
1106 | if (spec_long) | |
1107 | { | |
1108 | if (spec_long_long) | |
1109 | error ("three 'l' suffixes on integer constant"); | |
1110 | else if (suffix_lu) | |
1111 | error ("'lul' is not a valid integer suffix"); | |
1112 | else if (c != spec_long) | |
1113 | error ("'Ll' and 'lL' are not valid integer suffixes"); | |
1114 | else if (pedantic && ! flag_isoc99 | |
1115 | && ! in_system_header && warn_long_long) | |
1116 | pedwarn ("ISO C89 forbids long long integer constants"); | |
1117 | spec_long_long = 1; | |
1118 | } | |
1119 | spec_long = c; | |
1120 | break; | |
56f48ce9 | 1121 | |
0e5921e8 ZW |
1122 | case 'i': case 'I': case 'j': case 'J': |
1123 | if (spec_imag) | |
1124 | error ("more than one 'i' or 'j' suffix on integer constant"); | |
1125 | else if (pedantic) | |
1126 | pedwarn ("ISO C forbids imaginary numeric constants"); | |
1127 | spec_imag = 1; | |
1128 | break; | |
56f48ce9 | 1129 | |
0e5921e8 ZW |
1130 | default: |
1131 | ERROR ("invalid suffix on integer constant"); | |
1132 | } | |
1133 | } | |
56f48ce9 | 1134 | |
ec5c56db | 1135 | /* If the literal overflowed, pedwarn about it now. */ |
0e5921e8 ZW |
1136 | if (overflow) |
1137 | { | |
1138 | warn = 1; | |
1139 | pedwarn ("integer constant is too large for this configuration of the compiler - truncated to %d bits", HOST_BITS_PER_WIDE_INT * 2); | |
1140 | } | |
e8bbfc4e | 1141 | |
0e5921e8 ZW |
1142 | /* This is simplified by the fact that our constant |
1143 | is always positive. */ | |
56f48ce9 | 1144 | |
0e5921e8 | 1145 | high = low = 0; |
e8bbfc4e | 1146 | |
0e5921e8 ZW |
1147 | for (i = 0; i < HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR; i++) |
1148 | { | |
1149 | high |= ((HOST_WIDE_INT) parts[i + (HOST_BITS_PER_WIDE_INT | |
1150 | / HOST_BITS_PER_CHAR)] | |
1151 | << (i * HOST_BITS_PER_CHAR)); | |
1152 | low |= (HOST_WIDE_INT) parts[i] << (i * HOST_BITS_PER_CHAR); | |
1153 | } | |
0468bc75 | 1154 | |
0e5921e8 ZW |
1155 | value = build_int_2 (low, high); |
1156 | TREE_TYPE (value) = long_long_unsigned_type_node; | |
e8bbfc4e | 1157 | |
0e5921e8 ZW |
1158 | /* If warn_traditional, calculate both the ISO type and the |
1159 | traditional type, then see if they disagree. | |
1160 | Otherwise, calculate only the type for the dialect in use. */ | |
1161 | if (warn_traditional || flag_traditional) | |
1162 | { | |
1163 | /* Calculate the traditional type. */ | |
1164 | /* Traditionally, any constant is signed; but if unsigned is | |
1165 | specified explicitly, obey that. Use the smallest size | |
1166 | with the right number of bits, except for one special | |
1167 | case with decimal constants. */ | |
1168 | if (! spec_long && base != 10 | |
1169 | && int_fits_type_p (value, unsigned_type_node)) | |
1170 | trad_type = spec_unsigned ? unsigned_type_node : integer_type_node; | |
1171 | /* A decimal constant must be long if it does not fit in | |
1172 | type int. I think this is independent of whether the | |
1173 | constant is signed. */ | |
1174 | else if (! spec_long && base == 10 | |
1175 | && int_fits_type_p (value, integer_type_node)) | |
1176 | trad_type = spec_unsigned ? unsigned_type_node : integer_type_node; | |
1177 | else if (! spec_long_long) | |
1178 | trad_type = (spec_unsigned | |
1179 | ? long_unsigned_type_node | |
1180 | : long_integer_type_node); | |
1181 | else if (int_fits_type_p (value, | |
1182 | spec_unsigned | |
1183 | ? long_long_unsigned_type_node | |
1184 | : long_long_integer_type_node)) | |
1185 | trad_type = (spec_unsigned | |
1186 | ? long_long_unsigned_type_node | |
1187 | : long_long_integer_type_node); | |
1188 | else | |
1189 | trad_type = (spec_unsigned | |
1190 | ? widest_unsigned_literal_type_node | |
1191 | : widest_integer_literal_type_node); | |
1192 | } | |
1193 | if (warn_traditional || ! flag_traditional) | |
1194 | { | |
1195 | /* Calculate the ISO type. */ | |
1196 | if (! spec_long && ! spec_unsigned | |
1197 | && int_fits_type_p (value, integer_type_node)) | |
1198 | ansi_type = integer_type_node; | |
1199 | else if (! spec_long && (base != 10 || spec_unsigned) | |
1200 | && int_fits_type_p (value, unsigned_type_node)) | |
1201 | ansi_type = unsigned_type_node; | |
1202 | else if (! spec_unsigned && !spec_long_long | |
1203 | && int_fits_type_p (value, long_integer_type_node)) | |
1204 | ansi_type = long_integer_type_node; | |
1205 | else if (! spec_long_long | |
1206 | && int_fits_type_p (value, long_unsigned_type_node)) | |
1207 | ansi_type = long_unsigned_type_node; | |
1208 | else if (! spec_unsigned | |
1209 | && int_fits_type_p (value, long_long_integer_type_node)) | |
1210 | ansi_type = long_long_integer_type_node; | |
1211 | else if (int_fits_type_p (value, long_long_unsigned_type_node)) | |
1212 | ansi_type = long_long_unsigned_type_node; | |
1213 | else if (! spec_unsigned | |
1214 | && int_fits_type_p (value, widest_integer_literal_type_node)) | |
1215 | ansi_type = widest_integer_literal_type_node; | |
1216 | else | |
1217 | ansi_type = widest_unsigned_literal_type_node; | |
1218 | } | |
e8bbfc4e | 1219 | |
0e5921e8 | 1220 | type = flag_traditional ? trad_type : ansi_type; |
e8bbfc4e | 1221 | |
0e5921e8 ZW |
1222 | /* We assume that constants specified in a non-decimal |
1223 | base are bit patterns, and that the programmer really | |
1224 | meant what they wrote. */ | |
1225 | if (warn_traditional && !in_system_header | |
1226 | && base == 10 && trad_type != ansi_type) | |
1227 | { | |
1228 | if (TYPE_PRECISION (trad_type) != TYPE_PRECISION (ansi_type)) | |
1229 | warning ("width of integer constant changes with -traditional"); | |
1230 | else if (TREE_UNSIGNED (trad_type) != TREE_UNSIGNED (ansi_type)) | |
1231 | warning ("integer constant is unsigned in ISO C, signed with -traditional"); | |
1232 | else | |
1233 | warning ("width of integer constant may change on other systems with -traditional"); | |
1234 | } | |
e8bbfc4e | 1235 | |
b15ad712 JM |
1236 | if (pedantic && !flag_traditional && (flag_isoc99 || !spec_long_long) |
1237 | && !warn | |
1238 | && ((flag_isoc99 | |
1239 | ? TYPE_PRECISION (long_long_integer_type_node) | |
1240 | : TYPE_PRECISION (long_integer_type_node)) < TYPE_PRECISION (type))) | |
0e5921e8 ZW |
1241 | { |
1242 | warn = 1; | |
b15ad712 JM |
1243 | pedwarn ("integer constant larger than the maximum value of %s", |
1244 | (flag_isoc99 | |
1245 | ? (TREE_UNSIGNED (type) | |
1246 | ? "an unsigned long long int" | |
1247 | : "a long long int") | |
1248 | : "an unsigned long int")); | |
0e5921e8 | 1249 | } |
e8bbfc4e | 1250 | |
0e5921e8 ZW |
1251 | if (base == 10 && ! spec_unsigned && TREE_UNSIGNED (type)) |
1252 | warning ("decimal constant is so large that it is unsigned"); | |
e8bbfc4e | 1253 | |
0e5921e8 ZW |
1254 | if (spec_imag) |
1255 | { | |
1256 | if (TYPE_PRECISION (type) | |
1257 | <= TYPE_PRECISION (integer_type_node)) | |
1258 | value = build_complex (NULL_TREE, integer_zero_node, | |
1259 | convert (integer_type_node, value)); | |
1260 | else | |
1261 | ERROR ("complex integer constant is too wide for 'complex int'"); | |
1262 | } | |
1263 | else if (flag_traditional && !int_fits_type_p (value, type)) | |
1264 | /* The traditional constant 0x80000000 is signed | |
1265 | but doesn't fit in the range of int. | |
1266 | This will change it to -0x80000000, which does fit. */ | |
1267 | { | |
1268 | TREE_TYPE (value) = unsigned_type (type); | |
1269 | value = convert (type, value); | |
1270 | TREE_OVERFLOW (value) = TREE_CONSTANT_OVERFLOW (value) = 0; | |
1271 | } | |
1272 | else | |
1273 | TREE_TYPE (value) = type; | |
e8bbfc4e | 1274 | |
0e5921e8 | 1275 | /* If it's still an integer (not a complex), and it doesn't |
ec5c56db | 1276 | fit in the type we choose for it, then pedwarn. */ |
fbb18613 | 1277 | |
0e5921e8 ZW |
1278 | if (! warn |
1279 | && TREE_CODE (TREE_TYPE (value)) == INTEGER_TYPE | |
1280 | && ! int_fits_type_p (value, TREE_TYPE (value))) | |
1281 | pedwarn ("integer constant is larger than the maximum value for its type"); | |
1282 | } | |
fbb18613 | 1283 | |
0e5921e8 ZW |
1284 | if (p < str + len) |
1285 | error ("missing white space after number '%.*s'", (int) (p - str), str); | |
e8bbfc4e | 1286 | |
0e5921e8 | 1287 | return value; |
e8bbfc4e | 1288 | |
0e5921e8 ZW |
1289 | syntax_error: |
1290 | return integer_zero_node; | |
1291 | } | |
e8bbfc4e | 1292 | |
0e5921e8 ZW |
1293 | static tree |
1294 | lex_string (str, len, wide) | |
1295 | const char *str; | |
1296 | unsigned int len; | |
1297 | int wide; | |
1298 | { | |
1299 | tree value; | |
1300 | char *buf = alloca ((len + 1) * (wide ? WCHAR_BYTES : 1)); | |
1301 | char *q = buf; | |
1302 | const char *p = str, *limit = str + len; | |
1303 | unsigned int c; | |
1304 | unsigned width = wide ? WCHAR_TYPE_SIZE | |
1305 | : TYPE_PRECISION (char_type_node); | |
e9a25f70 | 1306 | |
0e5921e8 ZW |
1307 | #ifdef MULTIBYTE_CHARS |
1308 | /* Reset multibyte conversion state. */ | |
9714cf43 | 1309 | (void) local_mbtowc (NULL, NULL, 0); |
0e5921e8 | 1310 | #endif |
e9a25f70 | 1311 | |
0e5921e8 ZW |
1312 | while (p < limit) |
1313 | { | |
1314 | #ifdef MULTIBYTE_CHARS | |
1315 | wchar_t wc; | |
1316 | int char_len; | |
1317 | ||
1318 | char_len = local_mbtowc (&wc, p, limit - p); | |
1319 | if (char_len == -1) | |
1320 | { | |
1321 | warning ("Ignoring invalid multibyte character"); | |
1322 | char_len = 1; | |
1323 | c = *p++; | |
1324 | } | |
1325 | else | |
1326 | { | |
1327 | p += char_len; | |
1328 | c = wc; | |
1329 | } | |
1330 | #else | |
1331 | c = *p++; | |
1332 | #endif | |
1333 | ||
1334 | if (c == '\\' && !ignore_escape_flag) | |
1335 | { | |
62729350 NB |
1336 | unsigned int mask; |
1337 | ||
1338 | if (width < HOST_BITS_PER_INT) | |
1339 | mask = ((unsigned int) 1 << width) - 1; | |
1340 | else | |
1341 | mask = ~0; | |
1342 | c = cpp_parse_escape (parse_in, (const unsigned char **) &p, | |
1343 | (const unsigned char *) limit, | |
1344 | mask, flag_traditional); | |
0e5921e8 ZW |
1345 | } |
1346 | ||
1347 | /* Add this single character into the buffer either as a wchar_t | |
1348 | or as a single byte. */ | |
1349 | if (wide) | |
1350 | { | |
1351 | unsigned charwidth = TYPE_PRECISION (char_type_node); | |
5c80f6e6 | 1352 | unsigned bytemask = (1 << charwidth) - 1; |
0e5921e8 ZW |
1353 | int byte; |
1354 | ||
1355 | for (byte = 0; byte < WCHAR_BYTES; ++byte) | |
1356 | { | |
1357 | int n; | |
1358 | if (byte >= (int) sizeof (c)) | |
1359 | n = 0; | |
1360 | else | |
1361 | n = (c >> (byte * charwidth)) & bytemask; | |
1362 | if (BYTES_BIG_ENDIAN) | |
1363 | q[WCHAR_BYTES - byte - 1] = n; | |
1364 | else | |
1365 | q[byte] = n; | |
1366 | } | |
1367 | q += WCHAR_BYTES; | |
1368 | } | |
1369 | else | |
1370 | { | |
1371 | *q++ = c; | |
1372 | } | |
e8bbfc4e RK |
1373 | } |
1374 | ||
0e5921e8 ZW |
1375 | /* Terminate the string value, either with a single byte zero |
1376 | or with a wide zero. */ | |
e8bbfc4e | 1377 | |
0e5921e8 ZW |
1378 | if (wide) |
1379 | { | |
1380 | memset (q, 0, WCHAR_BYTES); | |
1381 | q += WCHAR_BYTES; | |
1382 | } | |
1383 | else | |
1384 | { | |
1385 | *q++ = '\0'; | |
1386 | } | |
1387 | ||
1388 | value = build_string (q - buf, buf); | |
1389 | ||
1390 | if (wide) | |
1391 | TREE_TYPE (value) = wchar_array_type_node; | |
1392 | else | |
1393 | TREE_TYPE (value) = char_array_type_node; | |
e8bbfc4e RK |
1394 | return value; |
1395 | } | |
1396 | ||
c8a96070 | 1397 | /* Converts a (possibly wide) character constant token into a tree. */ |
0e5921e8 | 1398 | static tree |
c8a96070 NB |
1399 | lex_charconst (token) |
1400 | const cpp_token *token; | |
e8bbfc4e | 1401 | { |
c8a96070 | 1402 | HOST_WIDE_INT result; |
0e5921e8 | 1403 | tree value; |
c8a96070 NB |
1404 | unsigned int chars_seen; |
1405 | ||
1406 | result = cpp_interpret_charconst (parse_in, token, warn_multichar, | |
1407 | flag_traditional, &chars_seen); | |
1408 | if (token->type == CPP_WCHAR) | |
0e5921e8 | 1409 | { |
c8a96070 NB |
1410 | value = build_int_2 (result, 0); |
1411 | TREE_TYPE (value) = wchar_type_node; | |
0e5921e8 | 1412 | } |
c8a96070 | 1413 | else |
0e5921e8 | 1414 | { |
c8a96070 NB |
1415 | if (result < 0) |
1416 | value = build_int_2 (result, -1); | |
0e5921e8 | 1417 | else |
c8a96070 NB |
1418 | value = build_int_2 (result, 0); |
1419 | ||
1420 | /* In C, a character constant has type 'int'. | |
1421 | In C++ 'char', but multi-char charconsts have type 'int'. */ | |
1422 | if (c_language == clk_cplusplus && chars_seen <= 1) | |
1423 | TREE_TYPE (value) = char_type_node; | |
0e5921e8 | 1424 | else |
c8a96070 | 1425 | TREE_TYPE (value) = integer_type_node; |
0e5921e8 | 1426 | } |
c8a96070 | 1427 | |
0e5921e8 | 1428 | return value; |
e8bbfc4e | 1429 | } |