1 /* Lexical analyzer for C and Objective C.
2 Copyright (C) 1987, 1988, 1989, 1992, 1994, 1995, 1996, 1997
3 1998, 1999, 2000 Free Software Foundation, Inc.
5 This file is part of GNU CC.
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)
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.
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
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
39 #include "splay-tree.h"
41 /* MULTIBYTE_CHARS support only works for native compilers.
42 ??? Ideally what we want is to model widechar support after
43 the current floating point support. */
45 #undef MULTIBYTE_CHARS
48 #ifdef MULTIBYTE_CHARS
51 #endif /* MULTIBYTE_CHARS */
52 #ifndef GET_ENVIRONMENT
53 #define GET_ENVIRONMENT(ENV_VALUE,ENV_NAME) ((ENV_VALUE) = getenv (ENV_NAME))
56 /* The original file name, before changing "-" to "stdin". */
57 static const char *orig_filename;
59 /* Private idea of the line number. See discussion in c_lex(). */
60 static int lex_lineno;
62 /* We may keep statistics about how long which files took to compile. */
63 static int header_time, body_time;
64 static splay_tree file_info_tree;
66 /* Cause the `yydebug' variable to be defined. */
69 /* File used for outputting assembler code. */
70 extern FILE *asm_out_file;
72 #undef WCHAR_TYPE_SIZE
73 #define WCHAR_TYPE_SIZE TYPE_PRECISION (wchar_type_node)
75 /* Number of bytes in a wide character. */
76 #define WCHAR_BYTES (WCHAR_TYPE_SIZE / BITS_PER_UNIT)
78 int indent_level; /* Number of { minus number of }. */
79 int pending_lang_change; /* If we need to switch languages - C++ only */
80 int c_header_level; /* depth in C headers - C++ only */
82 /* Nonzero tells yylex to ignore \ in string constants. */
83 static int ignore_escape_flag;
85 static const char *readescape PARAMS ((const char *, const char *,
87 static const char *read_ucs PARAMS ((const char *, const char *,
88 unsigned int *, int));
89 static void parse_float PARAMS ((PTR));
90 static tree lex_number PARAMS ((const char *, unsigned int));
91 static tree lex_string PARAMS ((const char *, unsigned int, int));
92 static tree lex_charconst PARAMS ((const char *, unsigned int, int));
93 static void update_header_times PARAMS ((const char *));
94 static int dump_one_header PARAMS ((splay_tree_node, void *));
95 static void cb_ident PARAMS ((cpp_reader *, const cpp_string *));
96 static void cb_change_file PARAMS ((cpp_reader *, const cpp_file_change *));
97 static void cb_def_pragma PARAMS ((cpp_reader *));
100 init_c_lex (filename)
101 const char *filename;
103 struct c_fileinfo *toplevel;
105 orig_filename = filename;
107 /* Set up filename timing. Must happen before cpp_start_read. */
108 file_info_tree = splay_tree_new ((splay_tree_compare_fn)strcmp,
110 (splay_tree_delete_value_fn)free);
111 toplevel = get_fileinfo ("<top level>");
112 if (flag_detailed_statistics)
115 body_time = get_run_time ();
116 toplevel->time = body_time;
119 #ifdef MULTIBYTE_CHARS
120 /* Change to the native locale for multibyte conversions. */
121 setlocale (LC_CTYPE, "");
122 GET_ENVIRONMENT (literal_codeset, "LANG");
125 parse_in.cb.ident = cb_ident;
126 parse_in.cb.change_file = cb_change_file;
127 parse_in.cb.def_pragma = cb_def_pragma;
129 /* Make sure parse_in.digraphs matches flag_digraphs. */
130 CPP_OPTION (&parse_in, digraphs) = flag_digraphs;
132 if (filename == 0 || !strcmp (filename, "-"))
135 /* Start it at 0, because check_newline is called at the very beginning
136 and will increment it to 1. */
137 lineno = lex_lineno = 0;
142 /* A thin wrapper around the real parser that initializes the
143 integrated preprocessor after debug output has been initialized. */
148 if (! cpp_start_read (&parse_in, orig_filename))
149 return 1; /* cpplib has emitted an error. */
159 struct c_fileinfo *fi;
161 n = splay_tree_lookup (file_info_tree, (splay_tree_key) name);
163 return (struct c_fileinfo *) n->value;
165 fi = (struct c_fileinfo *) xmalloc (sizeof (struct c_fileinfo));
167 fi->interface_only = 0;
168 fi->interface_unknown = 1;
169 splay_tree_insert (file_info_tree, (splay_tree_key) name,
170 (splay_tree_value) fi);
175 update_header_times (name)
178 /* Changing files again. This means currently collected time
179 is charged against header time, and body time starts back at 0. */
180 if (flag_detailed_statistics)
182 int this_time = get_run_time ();
183 struct c_fileinfo *file = get_fileinfo (name);
184 header_time += this_time - body_time;
185 file->time += this_time - body_time;
186 body_time = this_time;
191 dump_one_header (n, dummy)
193 void *dummy ATTRIBUTE_UNUSED;
195 print_time ((const char *) n->key,
196 ((struct c_fileinfo *) n->value)->time);
201 dump_time_statistics ()
203 struct c_fileinfo *file = get_fileinfo (input_filename);
204 int this_time = get_run_time ();
205 file->time += this_time - body_time;
207 fprintf (stderr, "\n******\n");
208 print_time ("header files (total)", header_time);
209 print_time ("main file (total)", this_time - body_time);
210 fprintf (stderr, "ratio = %g : 1\n",
211 (double)header_time / (double)(this_time - body_time));
212 fprintf (stderr, "\n******\n");
214 splay_tree_foreach (file_info_tree, dump_one_header, 0);
217 /* Not yet handled: #pragma, #define, #undef.
218 No need to deal with linemarkers under normal conditions. */
221 cb_ident (pfile, str)
222 cpp_reader *pfile ATTRIBUTE_UNUSED;
223 const cpp_string *str;
225 #ifdef ASM_OUTPUT_IDENT
228 /* Convert escapes in the string. */
229 tree value = lex_string ((const char *)str->text, str->len, 0);
230 ASM_OUTPUT_IDENT (asm_out_file, TREE_STRING_POINTER (value));
236 cb_change_file (pfile, fc)
237 cpp_reader *pfile ATTRIBUTE_UNUSED;
238 const cpp_file_change *fc;
240 if (fc->from.filename == 0)
241 main_input_filename = fc->to.filename;
242 in_system_header = fc->sysp;
244 /* Do the actions implied by the preceding numbers. */
245 if (fc->reason == FC_ENTER)
247 /* FIXME. Don't stack the main buffer on the input stack. */
248 if (fc->from.filename)
251 push_srcloc (fc->to.filename, 1);
252 input_file_stack->indent_level = indent_level;
253 debug_start_source_file (fc->to.filename);
254 #ifndef NO_IMPLICIT_EXTERN_C
257 else if (fc->externc)
260 ++pending_lang_change;
265 else if (fc->reason == FC_LEAVE)
267 /* Popping out of a file. */
268 if (input_file_stack->next)
270 #ifndef NO_IMPLICIT_EXTERN_C
271 if (c_header_level && --c_header_level == 0)
274 warning ("badly nested C headers from preprocessor");
275 --pending_lang_change;
279 if (indent_level != input_file_stack->indent_level)
281 warning_with_file_and_line
282 (input_filename, lex_lineno,
283 "This file contains more '%c's than '%c's.",
284 indent_level > input_file_stack->indent_level ? '{' : '}',
285 indent_level > input_file_stack->indent_level ? '}' : '{');
289 debug_end_source_file (input_file_stack->line);
292 error ("leaving more files than we entered");
294 else if (fc->reason == FC_RENAME)
295 input_filename = fc->to.filename;
297 update_header_times (fc->to.filename);
299 input_filename = fc->to.filename;
300 lex_lineno = fc->to.lineno;
303 extract_interface_info ();
307 cb_def_pragma (pfile)
310 /* Issue a warning message if we have been asked to do so. Ignore
311 unknown pragmas in system headers unless an explicit
312 -Wunknown-pragmas has been given. */
313 if (warn_unknown_pragmas > in_system_header)
315 const unsigned char *space, *name = 0;
318 cpp_get_token (pfile, &s);
319 space = cpp_token_as_text (pfile, &s);
320 cpp_get_token (pfile, &s);
321 if (s.type == CPP_NAME)
322 name = cpp_token_as_text (pfile, &s);
325 warning ("ignoring #pragma %s %s", space, name);
327 warning ("ignoring #pragma %s", space);
331 /* Parse a '\uNNNN' or '\UNNNNNNNN' sequence.
333 [lex.charset]: The character designated by the universal-character-name
334 \UNNNNNNNN is that character whose character short name in ISO/IEC 10646
335 is NNNNNNNN; the character designated by the universal-character-name
336 \uNNNN is that character whose character short name in ISO/IEC 10646 is
337 0000NNNN. If the hexadecimal value for a universal character name is
338 less than 0x20 or in the range 0x7F-0x9F (inclusive), or if the
339 universal character name designates a character in the basic source
340 character set, then the program is ill-formed.
342 We assume that wchar_t is Unicode, so we don't need to do any
343 mapping. Is this ever wrong? */
346 read_ucs (p, limit, cptr, length)
352 unsigned int code = 0;
355 for (; length; --length)
359 error ("incomplete universal-character-name");
366 error ("non hex digit '%c' in universal-character-name", c);
372 if (c >= 'a' && c <= 'f')
373 code += c - 'a' + 10;
374 if (c >= 'A' && c <= 'F')
375 code += c - 'A' + 10;
376 if (c >= '0' && c <= '9')
381 sorry ("universal-character-name on EBCDIC target");
382 *cptr = 0x3f; /* EBCDIC invalid character */
386 if (code > 0x9f && !(code & 0x80000000))
387 /* True extended character, OK. */;
388 else if (code >= 0x20 && code < 0x7f)
390 /* ASCII printable character. The C character set consists of all of
391 these except $, @ and `. We use hex escapes so that this also
392 works with EBCDIC hosts. */
393 if (code != 0x24 && code != 0x40 && code != 0x60)
394 error ("universal-character-name used for '%c'", code);
397 error ("invalid universal-character-name");
403 /* Read an escape sequence and write its character equivalent into *CPTR.
404 P is the input pointer, which is just after the backslash. LIMIT
405 is how much text we have.
406 Returns the updated input pointer. */
409 readescape (p, limit, cptr)
414 unsigned int c, code, count;
415 unsigned firstdig = 0;
420 /* cpp has already issued an error for this. */
430 if (warn_traditional && !in_system_header)
431 warning ("the meaning of `\\x' varies with -traditional");
433 if (flag_traditional)
451 if (c >= 'a' && c <= 'f')
452 code += c - 'a' + 10;
453 if (c >= 'A' && c <= 'F')
454 code += c - 'A' + 10;
455 if (c >= '0' && c <= '9')
457 if (code != 0 || count != 0)
467 warning ("\\x used with no following hex digits");
472 /* Digits are all 0's. Ok. */
474 else if ((count - 1) * 4 >= TYPE_PRECISION (integer_type_node)
477 << (TYPE_PRECISION (integer_type_node)
480 pedwarn ("hex escape out of range");
484 case '0': case '1': case '2': case '3': case '4':
485 case '5': case '6': case '7':
487 for (count = 0; count < 3; count++)
489 if (c < '0' || c > '7')
494 code = (code * 8) + (c - '0');
506 case '\\': case '\'': case '"': case '?':
510 case 'n': *cptr = TARGET_NEWLINE; return p;
511 case 't': *cptr = TARGET_TAB; return p;
512 case 'r': *cptr = TARGET_CR; return p;
513 case 'f': *cptr = TARGET_FF; return p;
514 case 'b': *cptr = TARGET_BS; return p;
515 case 'v': *cptr = TARGET_VT; return p;
517 if (warn_traditional && !in_system_header)
518 warning ("the meaning of '\\a' varies with -traditional");
519 *cptr = flag_traditional ? c : TARGET_BELL;
522 /* Warnings and support checks handled by read_ucs(). */
524 if (c_language != clk_cplusplus && !flag_isoc99)
527 if (warn_traditional && !in_system_header)
528 warning ("the meaning of '\\%c' varies with -traditional", c);
530 return read_ucs (p, limit, cptr, c == 'u' ? 4 : 8);
534 pedwarn ("non-ISO-standard escape sequence, '\\%c'", c);
535 *cptr = TARGET_ESC; return p;
537 /* '\(', etc, are used at beginning of line to avoid confusing Emacs.
538 '\%' is used to prevent SCCS from getting confused. */
539 case '(': case '{': case '[': case '%':
541 pedwarn ("unknown escape sequence '\\%c'", c);
547 pedwarn ("unknown escape sequence '\\%c'", c);
549 pedwarn ("unknown escape sequence: '\\' followed by char 0x%x", c);
556 /* Returns nonzero if C is a universal-character-name. Give an error if it
557 is not one which may appear in an identifier, as per [extendid].
559 Note that extended character support in identifiers has not yet been
560 implemented. It is my personal opinion that this is not a desirable
561 feature. Portable code cannot count on support for more than the basic
562 identifier character set. */
575 /* None of the valid chars are outside the Basic Multilingual Plane (the
579 error ("universal-character-name '\\U%08x' not valid in identifier", c);
584 if ((c >= 0x00c0 && c <= 0x00d6)
585 || (c >= 0x00d8 && c <= 0x00f6)
586 || (c >= 0x00f8 && c <= 0x01f5)
587 || (c >= 0x01fa && c <= 0x0217)
588 || (c >= 0x0250 && c <= 0x02a8)
589 || (c >= 0x1e00 && c <= 0x1e9a)
590 || (c >= 0x1ea0 && c <= 0x1ef9))
595 || (c >= 0x0388 && c <= 0x038a)
597 || (c >= 0x038e && c <= 0x03a1)
598 || (c >= 0x03a3 && c <= 0x03ce)
599 || (c >= 0x03d0 && c <= 0x03d6)
604 || (c >= 0x03e2 && c <= 0x03f3)
605 || (c >= 0x1f00 && c <= 0x1f15)
606 || (c >= 0x1f18 && c <= 0x1f1d)
607 || (c >= 0x1f20 && c <= 0x1f45)
608 || (c >= 0x1f48 && c <= 0x1f4d)
609 || (c >= 0x1f50 && c <= 0x1f57)
613 || (c >= 0x1f5f && c <= 0x1f7d)
614 || (c >= 0x1f80 && c <= 0x1fb4)
615 || (c >= 0x1fb6 && c <= 0x1fbc)
616 || (c >= 0x1fc2 && c <= 0x1fc4)
617 || (c >= 0x1fc6 && c <= 0x1fcc)
618 || (c >= 0x1fd0 && c <= 0x1fd3)
619 || (c >= 0x1fd6 && c <= 0x1fdb)
620 || (c >= 0x1fe0 && c <= 0x1fec)
621 || (c >= 0x1ff2 && c <= 0x1ff4)
622 || (c >= 0x1ff6 && c <= 0x1ffc))
626 if ((c >= 0x0401 && c <= 0x040d)
627 || (c >= 0x040f && c <= 0x044f)
628 || (c >= 0x0451 && c <= 0x045c)
629 || (c >= 0x045e && c <= 0x0481)
630 || (c >= 0x0490 && c <= 0x04c4)
631 || (c >= 0x04c7 && c <= 0x04c8)
632 || (c >= 0x04cb && c <= 0x04cc)
633 || (c >= 0x04d0 && c <= 0x04eb)
634 || (c >= 0x04ee && c <= 0x04f5)
635 || (c >= 0x04f8 && c <= 0x04f9))
639 if ((c >= 0x0531 && c <= 0x0556)
640 || (c >= 0x0561 && c <= 0x0587))
644 if ((c >= 0x05d0 && c <= 0x05ea)
645 || (c >= 0x05f0 && c <= 0x05f4))
649 if ((c >= 0x0621 && c <= 0x063a)
650 || (c >= 0x0640 && c <= 0x0652)
651 || (c >= 0x0670 && c <= 0x06b7)
652 || (c >= 0x06ba && c <= 0x06be)
653 || (c >= 0x06c0 && c <= 0x06ce)
654 || (c >= 0x06e5 && c <= 0x06e7))
658 if ((c >= 0x0905 && c <= 0x0939)
659 || (c >= 0x0958 && c <= 0x0962))
663 if ((c >= 0x0985 && c <= 0x098c)
664 || (c >= 0x098f && c <= 0x0990)
665 || (c >= 0x0993 && c <= 0x09a8)
666 || (c >= 0x09aa && c <= 0x09b0)
668 || (c >= 0x09b6 && c <= 0x09b9)
669 || (c >= 0x09dc && c <= 0x09dd)
670 || (c >= 0x09df && c <= 0x09e1)
671 || (c >= 0x09f0 && c <= 0x09f1))
675 if ((c >= 0x0a05 && c <= 0x0a0a)
676 || (c >= 0x0a0f && c <= 0x0a10)
677 || (c >= 0x0a13 && c <= 0x0a28)
678 || (c >= 0x0a2a && c <= 0x0a30)
679 || (c >= 0x0a32 && c <= 0x0a33)
680 || (c >= 0x0a35 && c <= 0x0a36)
681 || (c >= 0x0a38 && c <= 0x0a39)
682 || (c >= 0x0a59 && c <= 0x0a5c)
687 if ((c >= 0x0a85 && c <= 0x0a8b)
689 || (c >= 0x0a8f && c <= 0x0a91)
690 || (c >= 0x0a93 && c <= 0x0aa8)
691 || (c >= 0x0aaa && c <= 0x0ab0)
692 || (c >= 0x0ab2 && c <= 0x0ab3)
693 || (c >= 0x0ab5 && c <= 0x0ab9)
698 if ((c >= 0x0b05 && c <= 0x0b0c)
699 || (c >= 0x0b0f && c <= 0x0b10)
700 || (c >= 0x0b13 && c <= 0x0b28)
701 || (c >= 0x0b2a && c <= 0x0b30)
702 || (c >= 0x0b32 && c <= 0x0b33)
703 || (c >= 0x0b36 && c <= 0x0b39)
704 || (c >= 0x0b5c && c <= 0x0b5d)
705 || (c >= 0x0b5f && c <= 0x0b61))
709 if ((c >= 0x0b85 && c <= 0x0b8a)
710 || (c >= 0x0b8e && c <= 0x0b90)
711 || (c >= 0x0b92 && c <= 0x0b95)
712 || (c >= 0x0b99 && c <= 0x0b9a)
714 || (c >= 0x0b9e && c <= 0x0b9f)
715 || (c >= 0x0ba3 && c <= 0x0ba4)
716 || (c >= 0x0ba8 && c <= 0x0baa)
717 || (c >= 0x0bae && c <= 0x0bb5)
718 || (c >= 0x0bb7 && c <= 0x0bb9))
722 if ((c >= 0x0c05 && c <= 0x0c0c)
723 || (c >= 0x0c0e && c <= 0x0c10)
724 || (c >= 0x0c12 && c <= 0x0c28)
725 || (c >= 0x0c2a && c <= 0x0c33)
726 || (c >= 0x0c35 && c <= 0x0c39)
727 || (c >= 0x0c60 && c <= 0x0c61))
731 if ((c >= 0x0c85 && c <= 0x0c8c)
732 || (c >= 0x0c8e && c <= 0x0c90)
733 || (c >= 0x0c92 && c <= 0x0ca8)
734 || (c >= 0x0caa && c <= 0x0cb3)
735 || (c >= 0x0cb5 && c <= 0x0cb9)
736 || (c >= 0x0ce0 && c <= 0x0ce1))
740 if ((c >= 0x0d05 && c <= 0x0d0c)
741 || (c >= 0x0d0e && c <= 0x0d10)
742 || (c >= 0x0d12 && c <= 0x0d28)
743 || (c >= 0x0d2a && c <= 0x0d39)
744 || (c >= 0x0d60 && c <= 0x0d61))
748 if ((c >= 0x0e01 && c <= 0x0e30)
749 || (c >= 0x0e32 && c <= 0x0e33)
750 || (c >= 0x0e40 && c <= 0x0e46)
751 || (c >= 0x0e4f && c <= 0x0e5b))
755 if ((c >= 0x0e81 && c <= 0x0e82)
761 || (c >= 0x0e94 && c <= 0x0e97)
762 || (c >= 0x0e99 && c <= 0x0e9f)
763 || (c >= 0x0ea1 && c <= 0x0ea3)
768 || (c >= 0x0ead && c <= 0x0eb0)
772 || (c >= 0x0ec0 && c <= 0x0ec4)
777 if ((c >= 0x10a0 && c <= 0x10c5)
778 || (c >= 0x10d0 && c <= 0x10f6))
782 if ((c >= 0x3041 && c <= 0x3094)
783 || (c >= 0x309b && c <= 0x309e))
787 if ((c >= 0x30a1 && c <= 0x30fe))
791 if ((c >= 0x3105 && c <= 0x312c))
795 if ((c >= 0x1100 && c <= 0x1159)
796 || (c >= 0x1161 && c <= 0x11a2)
797 || (c >= 0x11a8 && c <= 0x11f9))
800 /* CJK Unified Ideographs */
801 if ((c >= 0xf900 && c <= 0xfa2d)
802 || (c >= 0xfb1f && c <= 0xfb36)
803 || (c >= 0xfb38 && c <= 0xfb3c)
805 || (c >= 0xfb40 && c <= 0xfb41)
806 || (c >= 0xfb42 && c <= 0xfb44)
807 || (c >= 0xfb46 && c <= 0xfbb1)
808 || (c >= 0xfbd3 && c <= 0xfd3f)
809 || (c >= 0xfd50 && c <= 0xfd8f)
810 || (c >= 0xfd92 && c <= 0xfdc7)
811 || (c >= 0xfdf0 && c <= 0xfdfb)
812 || (c >= 0xfe70 && c <= 0xfe72)
814 || (c >= 0xfe76 && c <= 0xfefc)
815 || (c >= 0xff21 && c <= 0xff3a)
816 || (c >= 0xff41 && c <= 0xff5a)
817 || (c >= 0xff66 && c <= 0xffbe)
818 || (c >= 0xffc2 && c <= 0xffc7)
819 || (c >= 0xffca && c <= 0xffcf)
820 || (c >= 0xffd2 && c <= 0xffd7)
821 || (c >= 0xffda && c <= 0xffdc)
822 || (c >= 0x4e00 && c <= 0x9fa5))
825 error ("universal-character-name '\\u%04x' not valid in identifier", c);
830 /* Add the UTF-8 representation of C to the token_buffer. */
833 utf8_extend_token (c)
843 else if (c <= 0x000007ff)
844 shift = 6, mask = 0xc0;
845 else if (c <= 0x0000ffff)
846 shift = 12, mask = 0xe0;
847 else if (c <= 0x001fffff)
848 shift = 18, mask = 0xf0;
849 else if (c <= 0x03ffffff)
850 shift = 24, mask = 0xf8;
852 shift = 30, mask = 0xfc;
854 extend_token (mask | (c >> shift));
858 extend_token ((unsigned char) (0x80 | (c >> shift)));
873 struct try_type type_sequence[] =
875 { &integer_type_node, 0, 0, 0},
876 { &unsigned_type_node, 1, 0, 0},
877 { &long_integer_type_node, 0, 1, 0},
878 { &long_unsigned_type_node, 1, 1, 0},
879 { &long_long_integer_type_node, 0, 1, 1},
880 { &long_long_unsigned_type_node, 1, 1, 1}
892 int conversion_errno;
893 REAL_VALUE_TYPE value;
901 struct pf_args * args = (struct pf_args *) data;
902 const char *typename;
904 args->conversion_errno = 0;
905 args->type = double_type_node;
908 /* The second argument, machine_mode, of REAL_VALUE_ATOF
909 tells the desired precision of the binary result
910 of decimal-to-binary conversion. */
915 error ("both 'f' and 'l' suffixes on floating constant");
917 args->type = float_type_node;
920 else if (args->lflag)
922 args->type = long_double_type_node;
923 typename = "long double";
925 else if (flag_single_precision_constant)
927 args->type = float_type_node;
932 if (args->base == 16)
933 args->value = REAL_VALUE_HTOF (args->str, TYPE_MODE (args->type));
935 args->value = REAL_VALUE_ATOF (args->str, TYPE_MODE (args->type));
937 args->conversion_errno = errno;
938 /* A diagnostic is required here by some ISO C testsuites.
939 This is not pedwarn, because some people don't want
940 an error for this. */
941 if (REAL_VALUE_ISINF (args->value) && pedantic)
942 warning ("floating point number exceeds range of '%s'", typename);
953 timevar_push (TV_CPP);
954 cpp_get_token (&parse_in, &tok);
955 timevar_pop (TV_CPP);
957 /* The C++ front end does horrible things with the current line
958 number. To ensure an accurate line number, we must reset it
959 every time we return a token. */
960 lex_lineno = cpp_get_line (&parse_in)->line;
967 case CPP_OPEN_BRACE: indent_level++; break;
968 case CPP_CLOSE_BRACE: indent_level--; break;
970 /* Issue this error here, where we can get at tok.val.c. */
972 if (ISGRAPH (tok.val.c))
973 error ("stray '%c' in program", tok.val.c);
975 error ("stray '\\%#o' in program", tok.val.c);
979 *value = get_identifier ((const char *)tok.val.node->name);
985 *value = lex_number ((const char *)tok.val.str.text, tok.val.str.len);
990 *value = lex_charconst ((const char *)tok.val.str.text,
991 tok.val.str.len, tok.type == CPP_WCHAR);
997 *value = lex_string ((const char *)tok.val.str.text,
998 tok.val.str.len, tok.type == CPP_WSTRING);
1001 /* These tokens should not be visible outside cpplib. */
1002 case CPP_HEADER_NAME:
1013 #define ERROR(msgid) do { error(msgid); goto syntax_error; } while(0)
1016 lex_number (str, len)
1022 int largest_digit = 0;
1028 enum anon1 { NOT_FLOAT = 0, AFTER_POINT, AFTER_EXPON } floatflag = NOT_FLOAT;
1030 /* We actually store only HOST_BITS_PER_CHAR bits in each part.
1031 The code below which fills the parts array assumes that a host
1032 int is at least twice as wide as a host char, and that
1033 HOST_BITS_PER_WIDE_INT is an even multiple of HOST_BITS_PER_CHAR.
1034 Two HOST_WIDE_INTs is the largest int literal we can store.
1035 In order to detect overflow below, the number of parts (TOTAL_PARTS)
1036 must be exactly the number of parts needed to hold the bits
1037 of two HOST_WIDE_INTs. */
1038 #define TOTAL_PARTS ((HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR) * 2)
1039 unsigned int parts[TOTAL_PARTS];
1041 /* Optimize for most frequent case. */
1045 return integer_zero_node;
1046 else if (*str == '1')
1047 return integer_one_node;
1049 return build_int_2 (*str - '0', 0);
1052 for (count = 0; count < TOTAL_PARTS; count++)
1055 /* len is known to be >1 at this point. */
1058 if (len > 2 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
1063 /* The ISDIGIT check is so we are not confused by a suffix on 0. */
1064 else if (str[0] == '0' && ISDIGIT (str[1]))
1076 if (base == 16 && pedantic && !flag_isoc99)
1077 pedwarn ("floating constant may not be in radix 16");
1078 else if (floatflag == AFTER_POINT)
1079 ERROR ("too many decimal points in floating constant");
1080 else if (floatflag == AFTER_EXPON)
1081 ERROR ("decimal point in exponent - impossible!");
1083 floatflag = AFTER_POINT;
1089 /* Possible future extension: silently ignore _ in numbers,
1090 permitting cosmetic grouping - e.g. 0x8000_0000 == 0x80000000
1091 but somewhat easier to read. Ada has this? */
1092 ERROR ("underscore in number");
1096 /* It is not a decimal point.
1097 It should be a digit (perhaps a hex digit). */
1103 else if (base <= 10 && (c == 'e' || c == 'E'))
1106 floatflag = AFTER_EXPON;
1109 else if (base == 16 && (c == 'p' || c == 'P'))
1111 floatflag = AFTER_EXPON;
1112 break; /* start of exponent */
1114 else if (base == 16 && c >= 'a' && c <= 'f')
1118 else if (base == 16 && c >= 'A' && c <= 'F')
1125 break; /* start of suffix */
1128 if (n >= largest_digit)
1132 for (count = 0; count < TOTAL_PARTS; count++)
1134 parts[count] *= base;
1138 += (parts[count-1] >> HOST_BITS_PER_CHAR);
1140 &= (1 << HOST_BITS_PER_CHAR) - 1;
1146 /* If the highest-order part overflows (gets larger than
1147 a host char will hold) then the whole number has
1148 overflowed. Record this and truncate the highest-order
1150 if (parts[TOTAL_PARTS - 1] >> HOST_BITS_PER_CHAR)
1153 parts[TOTAL_PARTS - 1] &= (1 << HOST_BITS_PER_CHAR) - 1;
1157 while (p < str + len);
1159 /* This can happen on input like `int i = 0x;' */
1161 ERROR ("numeric constant with no digits");
1163 if (largest_digit >= base)
1164 ERROR ("numeric constant contains digits beyond the radix");
1166 if (floatflag != NOT_FLOAT)
1169 int imag, fflag, lflag, conversion_errno;
1170 REAL_VALUE_TYPE real;
1171 struct pf_args args;
1174 if (base == 16 && floatflag != AFTER_EXPON)
1175 ERROR ("hexadecimal floating constant has no exponent");
1177 /* Read explicit exponent if any, and put it in tokenbuf. */
1178 if ((base == 10 && ((c == 'e') || (c == 'E')))
1179 || (base == 16 && (c == 'p' || c == 'P')))
1183 if (p < str + len && (c == '+' || c == '-'))
1185 /* Exponent is decimal, even if string is a hex float. */
1187 ERROR ("floating constant exponent has no digits");
1188 while (p < str + len && ISDIGIT (c))
1194 /* Copy the float constant now; we don't want any suffixes in the
1195 string passed to parse_float. */
1196 copy = alloca (p - str + 1);
1197 memcpy (copy, str, p - str);
1198 copy[p - str] = '\0';
1200 /* Now parse suffixes. */
1201 fflag = lflag = imag = 0;
1202 while (p < str + len)
1207 ERROR ("more than one 'f' suffix on floating constant");
1208 else if (warn_traditional && !in_system_header)
1209 warning ("traditional C rejects the 'f' suffix");
1216 ERROR ("more than one 'l' suffix on floating constant");
1217 else if (warn_traditional && !in_system_header)
1218 warning ("traditional C rejects the 'l' suffix");
1226 ERROR ("more than one 'i' or 'j' suffix on floating constant");
1228 pedwarn ("ISO C forbids imaginary numeric constants");
1233 ERROR ("invalid suffix on floating constant");
1236 /* Setup input for parse_float() */
1242 /* Convert string to a double, checking for overflow. */
1243 if (do_float_handler (parse_float, (PTR) &args))
1245 /* Receive output from parse_float() */
1249 /* We got an exception from parse_float() */
1250 ERROR ("floating constant out of range");
1252 /* Receive output from parse_float() */
1253 conversion_errno = args.conversion_errno;
1257 /* ERANGE is also reported for underflow,
1258 so test the value to distinguish overflow from that. */
1259 if (conversion_errno == ERANGE && !flag_traditional && pedantic
1260 && (REAL_VALUES_LESS (dconst1, real)
1261 || REAL_VALUES_LESS (real, dconstm1)))
1262 warning ("floating point number exceeds range of 'double'");
1265 /* Create a node with determined type and value. */
1267 value = build_complex (NULL_TREE, convert (type, integer_zero_node),
1268 build_real (type, real));
1270 value = build_real (type, real);
1274 tree trad_type, ansi_type, type;
1275 HOST_WIDE_INT high, low;
1276 int spec_unsigned = 0;
1278 int spec_long_long = 0;
1283 trad_type = ansi_type = type = NULL_TREE;
1284 while (p < str + len)
1291 error ("two 'u' suffixes on integer constant");
1292 else if (warn_traditional && !in_system_header)
1293 warning ("traditional C rejects the 'u' suffix");
1304 error ("three 'l' suffixes on integer constant");
1306 error ("'lul' is not a valid integer suffix");
1307 else if (c != spec_long)
1308 error ("'Ll' and 'lL' are not valid integer suffixes");
1309 else if (pedantic && ! flag_isoc99
1310 && ! in_system_header && warn_long_long)
1311 pedwarn ("ISO C89 forbids long long integer constants");
1317 case 'i': case 'I': case 'j': case 'J':
1319 error ("more than one 'i' or 'j' suffix on integer constant");
1321 pedwarn ("ISO C forbids imaginary numeric constants");
1326 ERROR ("invalid suffix on integer constant");
1330 /* If the literal overflowed, pedwarn about it now. */
1334 pedwarn ("integer constant is too large for this configuration of the compiler - truncated to %d bits", HOST_BITS_PER_WIDE_INT * 2);
1337 /* This is simplified by the fact that our constant
1338 is always positive. */
1342 for (i = 0; i < HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR; i++)
1344 high |= ((HOST_WIDE_INT) parts[i + (HOST_BITS_PER_WIDE_INT
1345 / HOST_BITS_PER_CHAR)]
1346 << (i * HOST_BITS_PER_CHAR));
1347 low |= (HOST_WIDE_INT) parts[i] << (i * HOST_BITS_PER_CHAR);
1350 value = build_int_2 (low, high);
1351 TREE_TYPE (value) = long_long_unsigned_type_node;
1353 /* If warn_traditional, calculate both the ISO type and the
1354 traditional type, then see if they disagree.
1355 Otherwise, calculate only the type for the dialect in use. */
1356 if (warn_traditional || flag_traditional)
1358 /* Calculate the traditional type. */
1359 /* Traditionally, any constant is signed; but if unsigned is
1360 specified explicitly, obey that. Use the smallest size
1361 with the right number of bits, except for one special
1362 case with decimal constants. */
1363 if (! spec_long && base != 10
1364 && int_fits_type_p (value, unsigned_type_node))
1365 trad_type = spec_unsigned ? unsigned_type_node : integer_type_node;
1366 /* A decimal constant must be long if it does not fit in
1367 type int. I think this is independent of whether the
1368 constant is signed. */
1369 else if (! spec_long && base == 10
1370 && int_fits_type_p (value, integer_type_node))
1371 trad_type = spec_unsigned ? unsigned_type_node : integer_type_node;
1372 else if (! spec_long_long)
1373 trad_type = (spec_unsigned
1374 ? long_unsigned_type_node
1375 : long_integer_type_node);
1376 else if (int_fits_type_p (value,
1378 ? long_long_unsigned_type_node
1379 : long_long_integer_type_node))
1380 trad_type = (spec_unsigned
1381 ? long_long_unsigned_type_node
1382 : long_long_integer_type_node);
1384 trad_type = (spec_unsigned
1385 ? widest_unsigned_literal_type_node
1386 : widest_integer_literal_type_node);
1388 if (warn_traditional || ! flag_traditional)
1390 /* Calculate the ISO type. */
1391 if (! spec_long && ! spec_unsigned
1392 && int_fits_type_p (value, integer_type_node))
1393 ansi_type = integer_type_node;
1394 else if (! spec_long && (base != 10 || spec_unsigned)
1395 && int_fits_type_p (value, unsigned_type_node))
1396 ansi_type = unsigned_type_node;
1397 else if (! spec_unsigned && !spec_long_long
1398 && int_fits_type_p (value, long_integer_type_node))
1399 ansi_type = long_integer_type_node;
1400 else if (! spec_long_long
1401 && int_fits_type_p (value, long_unsigned_type_node))
1402 ansi_type = long_unsigned_type_node;
1403 else if (! spec_unsigned
1404 && int_fits_type_p (value, long_long_integer_type_node))
1405 ansi_type = long_long_integer_type_node;
1406 else if (int_fits_type_p (value, long_long_unsigned_type_node))
1407 ansi_type = long_long_unsigned_type_node;
1408 else if (! spec_unsigned
1409 && int_fits_type_p (value, widest_integer_literal_type_node))
1410 ansi_type = widest_integer_literal_type_node;
1412 ansi_type = widest_unsigned_literal_type_node;
1415 type = flag_traditional ? trad_type : ansi_type;
1417 /* We assume that constants specified in a non-decimal
1418 base are bit patterns, and that the programmer really
1419 meant what they wrote. */
1420 if (warn_traditional && !in_system_header
1421 && base == 10 && trad_type != ansi_type)
1423 if (TYPE_PRECISION (trad_type) != TYPE_PRECISION (ansi_type))
1424 warning ("width of integer constant changes with -traditional");
1425 else if (TREE_UNSIGNED (trad_type) != TREE_UNSIGNED (ansi_type))
1426 warning ("integer constant is unsigned in ISO C, signed with -traditional");
1428 warning ("width of integer constant may change on other systems with -traditional");
1431 if (pedantic && !flag_traditional && (flag_isoc99 || !spec_long_long)
1434 ? TYPE_PRECISION (long_long_integer_type_node)
1435 : TYPE_PRECISION (long_integer_type_node)) < TYPE_PRECISION (type)))
1438 pedwarn ("integer constant larger than the maximum value of %s",
1440 ? (TREE_UNSIGNED (type)
1441 ? "an unsigned long long int"
1442 : "a long long int")
1443 : "an unsigned long int"));
1446 if (base == 10 && ! spec_unsigned && TREE_UNSIGNED (type))
1447 warning ("decimal constant is so large that it is unsigned");
1451 if (TYPE_PRECISION (type)
1452 <= TYPE_PRECISION (integer_type_node))
1453 value = build_complex (NULL_TREE, integer_zero_node,
1454 convert (integer_type_node, value));
1456 ERROR ("complex integer constant is too wide for 'complex int'");
1458 else if (flag_traditional && !int_fits_type_p (value, type))
1459 /* The traditional constant 0x80000000 is signed
1460 but doesn't fit in the range of int.
1461 This will change it to -0x80000000, which does fit. */
1463 TREE_TYPE (value) = unsigned_type (type);
1464 value = convert (type, value);
1465 TREE_OVERFLOW (value) = TREE_CONSTANT_OVERFLOW (value) = 0;
1468 TREE_TYPE (value) = type;
1470 /* If it's still an integer (not a complex), and it doesn't
1471 fit in the type we choose for it, then pedwarn. */
1474 && TREE_CODE (TREE_TYPE (value)) == INTEGER_TYPE
1475 && ! int_fits_type_p (value, TREE_TYPE (value)))
1476 pedwarn ("integer constant is larger than the maximum value for its type");
1480 error ("missing white space after number '%.*s'", (int) (p - str), str);
1485 return integer_zero_node;
1489 lex_string (str, len, wide)
1495 char *buf = alloca ((len + 1) * (wide ? WCHAR_BYTES : 1));
1497 const char *p = str, *limit = str + len;
1499 unsigned width = wide ? WCHAR_TYPE_SIZE
1500 : TYPE_PRECISION (char_type_node);
1502 #ifdef MULTIBYTE_CHARS
1503 /* Reset multibyte conversion state. */
1504 (void) local_mbtowc (NULL_PTR, NULL_PTR, 0);
1509 #ifdef MULTIBYTE_CHARS
1513 char_len = local_mbtowc (&wc, p, limit - p);
1516 warning ("Ignoring invalid multibyte character");
1529 if (c == '\\' && !ignore_escape_flag)
1531 p = readescape (p, limit, &c);
1532 if (width < HOST_BITS_PER_INT
1533 && (unsigned) c >= ((unsigned)1 << width))
1534 pedwarn ("escape sequence out of range for character");
1537 /* Add this single character into the buffer either as a wchar_t
1538 or as a single byte. */
1541 unsigned charwidth = TYPE_PRECISION (char_type_node);
1542 unsigned bytemask = (1 << charwidth) - 1;
1545 for (byte = 0; byte < WCHAR_BYTES; ++byte)
1548 if (byte >= (int) sizeof (c))
1551 n = (c >> (byte * charwidth)) & bytemask;
1552 if (BYTES_BIG_ENDIAN)
1553 q[WCHAR_BYTES - byte - 1] = n;
1565 /* Terminate the string value, either with a single byte zero
1566 or with a wide zero. */
1570 memset (q, 0, WCHAR_BYTES);
1578 value = build_string (q - buf, buf);
1581 TREE_TYPE (value) = wchar_array_type_node;
1583 TREE_TYPE (value) = char_array_type_node;
1588 lex_charconst (str, len, wide)
1593 const char *limit = str + len;
1597 unsigned width = TYPE_PRECISION (char_type_node);
1602 #ifdef MULTIBYTE_CHARS
1603 int longest_char = local_mb_cur_max ();
1604 (void) local_mbtowc (NULL_PTR, NULL_PTR, 0);
1607 max_chars = TYPE_PRECISION (integer_type_node) / width;
1609 width = WCHAR_TYPE_SIZE;
1613 #ifdef MULTIBYTE_CHARS
1617 char_len = local_mbtowc (&wc, str, limit - str);
1620 warning ("Ignoring invalid multibyte character");
1636 str = readescape (str, limit, &c);
1637 if (width < HOST_BITS_PER_INT
1638 && (unsigned) c >= ((unsigned)1 << width))
1639 pedwarn ("escape sequence out of range for character");
1641 #ifdef MAP_CHARACTER
1643 c = MAP_CHARACTER (c);
1646 /* Merge character into result; ignore excess chars. */
1647 num_chars += (width / TYPE_PRECISION (char_type_node));
1648 if (num_chars < max_chars + 1)
1650 if (width < HOST_BITS_PER_INT)
1651 result = (result << width) | (c & ((1 << width) - 1));
1657 if (chars_seen == 0)
1658 error ("empty character constant");
1659 else if (num_chars > max_chars)
1661 num_chars = max_chars;
1662 error ("character constant too long");
1664 else if (chars_seen != 1 && ! flag_traditional && warn_multichar)
1665 warning ("multi-character character constant");
1667 /* If char type is signed, sign-extend the constant. */
1670 int num_bits = num_chars * width;
1672 /* We already got an error; avoid invalid shift. */
1673 value = build_int_2 (0, 0);
1674 else if (TREE_UNSIGNED (char_type_node)
1675 || ((result >> (num_bits - 1)) & 1) == 0)
1676 value = build_int_2 (result & (~(unsigned HOST_WIDE_INT) 0
1677 >> (HOST_BITS_PER_WIDE_INT - num_bits)),
1680 value = build_int_2 (result | ~(~(unsigned HOST_WIDE_INT) 0
1681 >> (HOST_BITS_PER_WIDE_INT - num_bits)),
1683 /* In C, a character constant has type 'int'; in C++, 'char'. */
1684 if (chars_seen <= 1 && c_language == clk_cplusplus)
1685 TREE_TYPE (value) = char_type_node;
1687 TREE_TYPE (value) = integer_type_node;
1691 value = build_int_2 (result, 0);
1692 TREE_TYPE (value) = wchar_type_node;