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 if (filename
== 0 || !strcmp (filename
, "-"))
132 /* Start it at 0, because check_newline is called at the very beginning
133 and will increment it to 1. */
134 lineno
= lex_lineno
= 0;
139 /* A thin wrapper around the real parser that initializes the
140 integrated preprocessor after debug output has been initialized. */
145 if (! cpp_start_read (parse_in
, orig_filename
))
146 return 1; /* cpplib has emitted an error. */
156 struct c_fileinfo
*fi
;
158 n
= splay_tree_lookup (file_info_tree
, (splay_tree_key
) name
);
160 return (struct c_fileinfo
*) n
->value
;
162 fi
= (struct c_fileinfo
*) xmalloc (sizeof (struct c_fileinfo
));
164 fi
->interface_only
= 0;
165 fi
->interface_unknown
= 1;
166 splay_tree_insert (file_info_tree
, (splay_tree_key
) name
,
167 (splay_tree_value
) fi
);
172 update_header_times (name
)
175 /* Changing files again. This means currently collected time
176 is charged against header time, and body time starts back at 0. */
177 if (flag_detailed_statistics
)
179 int this_time
= get_run_time ();
180 struct c_fileinfo
*file
= get_fileinfo (name
);
181 header_time
+= this_time
- body_time
;
182 file
->time
+= this_time
- body_time
;
183 body_time
= this_time
;
188 dump_one_header (n
, dummy
)
190 void *dummy ATTRIBUTE_UNUSED
;
192 print_time ((const char *) n
->key
,
193 ((struct c_fileinfo
*) n
->value
)->time
);
198 dump_time_statistics ()
200 struct c_fileinfo
*file
= get_fileinfo (input_filename
);
201 int this_time
= get_run_time ();
202 file
->time
+= this_time
- body_time
;
204 fprintf (stderr
, "\n******\n");
205 print_time ("header files (total)", header_time
);
206 print_time ("main file (total)", this_time
- body_time
);
207 fprintf (stderr
, "ratio = %g : 1\n",
208 (double)header_time
/ (double)(this_time
- body_time
));
209 fprintf (stderr
, "\n******\n");
211 splay_tree_foreach (file_info_tree
, dump_one_header
, 0);
214 /* Not yet handled: #pragma, #define, #undef.
215 No need to deal with linemarkers under normal conditions. */
218 cb_ident (pfile
, str
)
219 cpp_reader
*pfile ATTRIBUTE_UNUSED
;
220 const cpp_string
*str ATTRIBUTE_UNUSED
;
222 #ifdef ASM_OUTPUT_IDENT
225 /* Convert escapes in the string. */
226 tree value
= lex_string ((const char *)str
->text
, str
->len
, 0);
227 ASM_OUTPUT_IDENT (asm_out_file
, TREE_STRING_POINTER (value
));
233 cb_change_file (pfile
, fc
)
234 cpp_reader
*pfile ATTRIBUTE_UNUSED
;
235 const cpp_file_change
*fc
;
237 if (fc
->from
.filename
== 0)
238 main_input_filename
= fc
->to
.filename
;
239 in_system_header
= fc
->sysp
;
241 /* Do the actions implied by the preceding numbers. */
242 if (fc
->reason
== FC_ENTER
)
244 /* FIXME. Don't stack the main buffer on the input stack. */
245 if (fc
->from
.filename
)
248 push_srcloc (fc
->to
.filename
, 1);
249 input_file_stack
->indent_level
= indent_level
;
250 debug_start_source_file (fc
->to
.filename
);
251 #ifndef NO_IMPLICIT_EXTERN_C
254 else if (fc
->externc
)
257 ++pending_lang_change
;
262 else if (fc
->reason
== FC_LEAVE
)
264 /* Popping out of a file. */
265 if (input_file_stack
->next
)
267 #ifndef NO_IMPLICIT_EXTERN_C
268 if (c_header_level
&& --c_header_level
== 0)
271 warning ("badly nested C headers from preprocessor");
272 --pending_lang_change
;
276 if (indent_level
!= input_file_stack
->indent_level
)
278 warning_with_file_and_line
279 (input_filename
, lex_lineno
,
280 "This file contains more '%c's than '%c's.",
281 indent_level
> input_file_stack
->indent_level
? '{' : '}',
282 indent_level
> input_file_stack
->indent_level
? '}' : '{');
286 debug_end_source_file (input_file_stack
->line
);
289 error ("leaving more files than we entered");
291 else if (fc
->reason
== FC_RENAME
)
292 input_filename
= fc
->to
.filename
;
294 update_header_times (fc
->to
.filename
);
296 input_filename
= fc
->to
.filename
;
297 lex_lineno
= fc
->to
.lineno
;
300 extract_interface_info ();
304 cb_def_pragma (pfile
)
307 /* Issue a warning message if we have been asked to do so. Ignore
308 unknown pragmas in system headers unless an explicit
309 -Wunknown-pragmas has been given. */
310 if (warn_unknown_pragmas
> in_system_header
)
312 const unsigned char *space
, *name
= 0;
315 cpp_get_token (pfile
, &s
);
316 space
= cpp_token_as_text (pfile
, &s
);
317 cpp_get_token (pfile
, &s
);
318 if (s
.type
== CPP_NAME
)
319 name
= cpp_token_as_text (pfile
, &s
);
322 warning ("ignoring #pragma %s %s", space
, name
);
324 warning ("ignoring #pragma %s", space
);
328 /* Parse a '\uNNNN' or '\UNNNNNNNN' sequence.
330 [lex.charset]: The character designated by the universal-character-name
331 \UNNNNNNNN is that character whose character short name in ISO/IEC 10646
332 is NNNNNNNN; the character designated by the universal-character-name
333 \uNNNN is that character whose character short name in ISO/IEC 10646 is
334 0000NNNN. If the hexadecimal value for a universal character name is
335 less than 0x20 or in the range 0x7F-0x9F (inclusive), or if the
336 universal character name designates a character in the basic source
337 character set, then the program is ill-formed.
339 We assume that wchar_t is Unicode, so we don't need to do any
340 mapping. Is this ever wrong? */
343 read_ucs (p
, limit
, cptr
, length
)
349 unsigned int code
= 0;
352 for (; length
; --length
)
356 error ("incomplete universal-character-name");
363 error ("non hex digit '%c' in universal-character-name", c
);
369 if (c
>= 'a' && c
<= 'f')
370 code
+= c
- 'a' + 10;
371 if (c
>= 'A' && c
<= 'F')
372 code
+= c
- 'A' + 10;
373 if (c
>= '0' && c
<= '9')
378 sorry ("universal-character-name on EBCDIC target");
379 *cptr
= 0x3f; /* EBCDIC invalid character */
383 if (code
> 0x9f && !(code
& 0x80000000))
384 /* True extended character, OK. */;
385 else if (code
>= 0x20 && code
< 0x7f)
387 /* ASCII printable character. The C character set consists of all of
388 these except $, @ and `. We use hex escapes so that this also
389 works with EBCDIC hosts. */
390 if (code
!= 0x24 && code
!= 0x40 && code
!= 0x60)
391 error ("universal-character-name used for '%c'", code
);
394 error ("invalid universal-character-name");
400 /* Read an escape sequence and write its character equivalent into *CPTR.
401 P is the input pointer, which is just after the backslash. LIMIT
402 is how much text we have.
403 Returns the updated input pointer. */
406 readescape (p
, limit
, cptr
)
411 unsigned int c
, code
, count
;
412 unsigned firstdig
= 0;
417 /* cpp has already issued an error for this. */
427 if (warn_traditional
&& !in_system_header
)
428 warning ("the meaning of `\\x' varies with -traditional");
430 if (flag_traditional
)
448 if (c
>= 'a' && c
<= 'f')
449 code
+= c
- 'a' + 10;
450 if (c
>= 'A' && c
<= 'F')
451 code
+= c
- 'A' + 10;
452 if (c
>= '0' && c
<= '9')
454 if (code
!= 0 || count
!= 0)
464 warning ("\\x used with no following hex digits");
469 /* Digits are all 0's. Ok. */
471 else if ((count
- 1) * 4 >= TYPE_PRECISION (integer_type_node
)
474 << (TYPE_PRECISION (integer_type_node
)
477 pedwarn ("hex escape out of range");
481 case '0': case '1': case '2': case '3': case '4':
482 case '5': case '6': case '7':
484 for (count
= 0; count
< 3; count
++)
486 if (c
< '0' || c
> '7')
491 code
= (code
* 8) + (c
- '0');
503 case '\\': case '\'': case '"': case '?':
507 case 'n': *cptr
= TARGET_NEWLINE
; return p
;
508 case 't': *cptr
= TARGET_TAB
; return p
;
509 case 'r': *cptr
= TARGET_CR
; return p
;
510 case 'f': *cptr
= TARGET_FF
; return p
;
511 case 'b': *cptr
= TARGET_BS
; return p
;
512 case 'v': *cptr
= TARGET_VT
; return p
;
514 if (warn_traditional
&& !in_system_header
)
515 warning ("the meaning of '\\a' varies with -traditional");
516 *cptr
= flag_traditional
? c
: TARGET_BELL
;
519 /* Warnings and support checks handled by read_ucs(). */
521 if (c_language
!= clk_cplusplus
&& !flag_isoc99
)
524 if (warn_traditional
&& !in_system_header
)
525 warning ("the meaning of '\\%c' varies with -traditional", c
);
527 return read_ucs (p
, limit
, cptr
, c
== 'u' ? 4 : 8);
531 pedwarn ("non-ISO-standard escape sequence, '\\%c'", c
);
532 *cptr
= TARGET_ESC
; return p
;
534 /* '\(', etc, are used at beginning of line to avoid confusing Emacs.
535 '\%' is used to prevent SCCS from getting confused. */
536 case '(': case '{': case '[': case '%':
538 pedwarn ("unknown escape sequence '\\%c'", c
);
544 pedwarn ("unknown escape sequence '\\%c'", c
);
546 pedwarn ("unknown escape sequence: '\\' followed by char 0x%x", c
);
553 /* Returns nonzero if C is a universal-character-name. Give an error if it
554 is not one which may appear in an identifier, as per [extendid].
556 Note that extended character support in identifiers has not yet been
557 implemented. It is my personal opinion that this is not a desirable
558 feature. Portable code cannot count on support for more than the basic
559 identifier character set. */
572 /* None of the valid chars are outside the Basic Multilingual Plane (the
576 error ("universal-character-name '\\U%08x' not valid in identifier", c
);
581 if ((c
>= 0x00c0 && c
<= 0x00d6)
582 || (c
>= 0x00d8 && c
<= 0x00f6)
583 || (c
>= 0x00f8 && c
<= 0x01f5)
584 || (c
>= 0x01fa && c
<= 0x0217)
585 || (c
>= 0x0250 && c
<= 0x02a8)
586 || (c
>= 0x1e00 && c
<= 0x1e9a)
587 || (c
>= 0x1ea0 && c
<= 0x1ef9))
592 || (c
>= 0x0388 && c
<= 0x038a)
594 || (c
>= 0x038e && c
<= 0x03a1)
595 || (c
>= 0x03a3 && c
<= 0x03ce)
596 || (c
>= 0x03d0 && c
<= 0x03d6)
601 || (c
>= 0x03e2 && c
<= 0x03f3)
602 || (c
>= 0x1f00 && c
<= 0x1f15)
603 || (c
>= 0x1f18 && c
<= 0x1f1d)
604 || (c
>= 0x1f20 && c
<= 0x1f45)
605 || (c
>= 0x1f48 && c
<= 0x1f4d)
606 || (c
>= 0x1f50 && c
<= 0x1f57)
610 || (c
>= 0x1f5f && c
<= 0x1f7d)
611 || (c
>= 0x1f80 && c
<= 0x1fb4)
612 || (c
>= 0x1fb6 && c
<= 0x1fbc)
613 || (c
>= 0x1fc2 && c
<= 0x1fc4)
614 || (c
>= 0x1fc6 && c
<= 0x1fcc)
615 || (c
>= 0x1fd0 && c
<= 0x1fd3)
616 || (c
>= 0x1fd6 && c
<= 0x1fdb)
617 || (c
>= 0x1fe0 && c
<= 0x1fec)
618 || (c
>= 0x1ff2 && c
<= 0x1ff4)
619 || (c
>= 0x1ff6 && c
<= 0x1ffc))
623 if ((c
>= 0x0401 && c
<= 0x040d)
624 || (c
>= 0x040f && c
<= 0x044f)
625 || (c
>= 0x0451 && c
<= 0x045c)
626 || (c
>= 0x045e && c
<= 0x0481)
627 || (c
>= 0x0490 && c
<= 0x04c4)
628 || (c
>= 0x04c7 && c
<= 0x04c8)
629 || (c
>= 0x04cb && c
<= 0x04cc)
630 || (c
>= 0x04d0 && c
<= 0x04eb)
631 || (c
>= 0x04ee && c
<= 0x04f5)
632 || (c
>= 0x04f8 && c
<= 0x04f9))
636 if ((c
>= 0x0531 && c
<= 0x0556)
637 || (c
>= 0x0561 && c
<= 0x0587))
641 if ((c
>= 0x05d0 && c
<= 0x05ea)
642 || (c
>= 0x05f0 && c
<= 0x05f4))
646 if ((c
>= 0x0621 && c
<= 0x063a)
647 || (c
>= 0x0640 && c
<= 0x0652)
648 || (c
>= 0x0670 && c
<= 0x06b7)
649 || (c
>= 0x06ba && c
<= 0x06be)
650 || (c
>= 0x06c0 && c
<= 0x06ce)
651 || (c
>= 0x06e5 && c
<= 0x06e7))
655 if ((c
>= 0x0905 && c
<= 0x0939)
656 || (c
>= 0x0958 && c
<= 0x0962))
660 if ((c
>= 0x0985 && c
<= 0x098c)
661 || (c
>= 0x098f && c
<= 0x0990)
662 || (c
>= 0x0993 && c
<= 0x09a8)
663 || (c
>= 0x09aa && c
<= 0x09b0)
665 || (c
>= 0x09b6 && c
<= 0x09b9)
666 || (c
>= 0x09dc && c
<= 0x09dd)
667 || (c
>= 0x09df && c
<= 0x09e1)
668 || (c
>= 0x09f0 && c
<= 0x09f1))
672 if ((c
>= 0x0a05 && c
<= 0x0a0a)
673 || (c
>= 0x0a0f && c
<= 0x0a10)
674 || (c
>= 0x0a13 && c
<= 0x0a28)
675 || (c
>= 0x0a2a && c
<= 0x0a30)
676 || (c
>= 0x0a32 && c
<= 0x0a33)
677 || (c
>= 0x0a35 && c
<= 0x0a36)
678 || (c
>= 0x0a38 && c
<= 0x0a39)
679 || (c
>= 0x0a59 && c
<= 0x0a5c)
684 if ((c
>= 0x0a85 && c
<= 0x0a8b)
686 || (c
>= 0x0a8f && c
<= 0x0a91)
687 || (c
>= 0x0a93 && c
<= 0x0aa8)
688 || (c
>= 0x0aaa && c
<= 0x0ab0)
689 || (c
>= 0x0ab2 && c
<= 0x0ab3)
690 || (c
>= 0x0ab5 && c
<= 0x0ab9)
695 if ((c
>= 0x0b05 && c
<= 0x0b0c)
696 || (c
>= 0x0b0f && c
<= 0x0b10)
697 || (c
>= 0x0b13 && c
<= 0x0b28)
698 || (c
>= 0x0b2a && c
<= 0x0b30)
699 || (c
>= 0x0b32 && c
<= 0x0b33)
700 || (c
>= 0x0b36 && c
<= 0x0b39)
701 || (c
>= 0x0b5c && c
<= 0x0b5d)
702 || (c
>= 0x0b5f && c
<= 0x0b61))
706 if ((c
>= 0x0b85 && c
<= 0x0b8a)
707 || (c
>= 0x0b8e && c
<= 0x0b90)
708 || (c
>= 0x0b92 && c
<= 0x0b95)
709 || (c
>= 0x0b99 && c
<= 0x0b9a)
711 || (c
>= 0x0b9e && c
<= 0x0b9f)
712 || (c
>= 0x0ba3 && c
<= 0x0ba4)
713 || (c
>= 0x0ba8 && c
<= 0x0baa)
714 || (c
>= 0x0bae && c
<= 0x0bb5)
715 || (c
>= 0x0bb7 && c
<= 0x0bb9))
719 if ((c
>= 0x0c05 && c
<= 0x0c0c)
720 || (c
>= 0x0c0e && c
<= 0x0c10)
721 || (c
>= 0x0c12 && c
<= 0x0c28)
722 || (c
>= 0x0c2a && c
<= 0x0c33)
723 || (c
>= 0x0c35 && c
<= 0x0c39)
724 || (c
>= 0x0c60 && c
<= 0x0c61))
728 if ((c
>= 0x0c85 && c
<= 0x0c8c)
729 || (c
>= 0x0c8e && c
<= 0x0c90)
730 || (c
>= 0x0c92 && c
<= 0x0ca8)
731 || (c
>= 0x0caa && c
<= 0x0cb3)
732 || (c
>= 0x0cb5 && c
<= 0x0cb9)
733 || (c
>= 0x0ce0 && c
<= 0x0ce1))
737 if ((c
>= 0x0d05 && c
<= 0x0d0c)
738 || (c
>= 0x0d0e && c
<= 0x0d10)
739 || (c
>= 0x0d12 && c
<= 0x0d28)
740 || (c
>= 0x0d2a && c
<= 0x0d39)
741 || (c
>= 0x0d60 && c
<= 0x0d61))
745 if ((c
>= 0x0e01 && c
<= 0x0e30)
746 || (c
>= 0x0e32 && c
<= 0x0e33)
747 || (c
>= 0x0e40 && c
<= 0x0e46)
748 || (c
>= 0x0e4f && c
<= 0x0e5b))
752 if ((c
>= 0x0e81 && c
<= 0x0e82)
758 || (c
>= 0x0e94 && c
<= 0x0e97)
759 || (c
>= 0x0e99 && c
<= 0x0e9f)
760 || (c
>= 0x0ea1 && c
<= 0x0ea3)
765 || (c
>= 0x0ead && c
<= 0x0eb0)
769 || (c
>= 0x0ec0 && c
<= 0x0ec4)
774 if ((c
>= 0x10a0 && c
<= 0x10c5)
775 || (c
>= 0x10d0 && c
<= 0x10f6))
779 if ((c
>= 0x3041 && c
<= 0x3094)
780 || (c
>= 0x309b && c
<= 0x309e))
784 if ((c
>= 0x30a1 && c
<= 0x30fe))
788 if ((c
>= 0x3105 && c
<= 0x312c))
792 if ((c
>= 0x1100 && c
<= 0x1159)
793 || (c
>= 0x1161 && c
<= 0x11a2)
794 || (c
>= 0x11a8 && c
<= 0x11f9))
797 /* CJK Unified Ideographs */
798 if ((c
>= 0xf900 && c
<= 0xfa2d)
799 || (c
>= 0xfb1f && c
<= 0xfb36)
800 || (c
>= 0xfb38 && c
<= 0xfb3c)
802 || (c
>= 0xfb40 && c
<= 0xfb41)
803 || (c
>= 0xfb42 && c
<= 0xfb44)
804 || (c
>= 0xfb46 && c
<= 0xfbb1)
805 || (c
>= 0xfbd3 && c
<= 0xfd3f)
806 || (c
>= 0xfd50 && c
<= 0xfd8f)
807 || (c
>= 0xfd92 && c
<= 0xfdc7)
808 || (c
>= 0xfdf0 && c
<= 0xfdfb)
809 || (c
>= 0xfe70 && c
<= 0xfe72)
811 || (c
>= 0xfe76 && c
<= 0xfefc)
812 || (c
>= 0xff21 && c
<= 0xff3a)
813 || (c
>= 0xff41 && c
<= 0xff5a)
814 || (c
>= 0xff66 && c
<= 0xffbe)
815 || (c
>= 0xffc2 && c
<= 0xffc7)
816 || (c
>= 0xffca && c
<= 0xffcf)
817 || (c
>= 0xffd2 && c
<= 0xffd7)
818 || (c
>= 0xffda && c
<= 0xffdc)
819 || (c
>= 0x4e00 && c
<= 0x9fa5))
822 error ("universal-character-name '\\u%04x' not valid in identifier", c
);
827 /* Add the UTF-8 representation of C to the token_buffer. */
830 utf8_extend_token (c
)
840 else if (c
<= 0x000007ff)
841 shift
= 6, mask
= 0xc0;
842 else if (c
<= 0x0000ffff)
843 shift
= 12, mask
= 0xe0;
844 else if (c
<= 0x001fffff)
845 shift
= 18, mask
= 0xf0;
846 else if (c
<= 0x03ffffff)
847 shift
= 24, mask
= 0xf8;
849 shift
= 30, mask
= 0xfc;
851 extend_token (mask
| (c
>> shift
));
855 extend_token ((unsigned char) (0x80 | (c
>> shift
)));
870 struct try_type type_sequence
[] =
872 { &integer_type_node
, 0, 0, 0},
873 { &unsigned_type_node
, 1, 0, 0},
874 { &long_integer_type_node
, 0, 1, 0},
875 { &long_unsigned_type_node
, 1, 1, 0},
876 { &long_long_integer_type_node
, 0, 1, 1},
877 { &long_long_unsigned_type_node
, 1, 1, 1}
889 int conversion_errno
;
890 REAL_VALUE_TYPE value
;
898 struct pf_args
* args
= (struct pf_args
*) data
;
899 const char *typename
;
901 args
->conversion_errno
= 0;
902 args
->type
= double_type_node
;
905 /* The second argument, machine_mode, of REAL_VALUE_ATOF
906 tells the desired precision of the binary result
907 of decimal-to-binary conversion. */
912 error ("both 'f' and 'l' suffixes on floating constant");
914 args
->type
= float_type_node
;
917 else if (args
->lflag
)
919 args
->type
= long_double_type_node
;
920 typename
= "long double";
922 else if (flag_single_precision_constant
)
924 args
->type
= float_type_node
;
929 if (args
->base
== 16)
930 args
->value
= REAL_VALUE_HTOF (args
->str
, TYPE_MODE (args
->type
));
932 args
->value
= REAL_VALUE_ATOF (args
->str
, TYPE_MODE (args
->type
));
934 args
->conversion_errno
= errno
;
935 /* A diagnostic is required here by some ISO C testsuites.
936 This is not pedwarn, because some people don't want
937 an error for this. */
938 if (REAL_VALUE_ISINF (args
->value
) && pedantic
)
939 warning ("floating point number exceeds range of '%s'", typename
);
950 timevar_push (TV_CPP
);
951 cpp_get_token (parse_in
, &tok
);
952 timevar_pop (TV_CPP
);
954 /* The C++ front end does horrible things with the current line
955 number. To ensure an accurate line number, we must reset it
956 every time we return a token. */
957 lex_lineno
= cpp_get_line (parse_in
)->line
;
964 case CPP_OPEN_BRACE
: indent_level
++; break;
965 case CPP_CLOSE_BRACE
: indent_level
--; break;
967 /* Issue this error here, where we can get at tok.val.c. */
969 if (ISGRAPH (tok
.val
.c
))
970 error ("stray '%c' in program", tok
.val
.c
);
972 error ("stray '\\%#o' in program", tok
.val
.c
);
976 *value
= get_identifier ((const char *)tok
.val
.node
->name
);
982 *value
= lex_number ((const char *)tok
.val
.str
.text
, tok
.val
.str
.len
);
987 *value
= lex_charconst ((const char *)tok
.val
.str
.text
,
988 tok
.val
.str
.len
, tok
.type
== CPP_WCHAR
);
994 *value
= lex_string ((const char *)tok
.val
.str
.text
,
995 tok
.val
.str
.len
, tok
.type
== CPP_WSTRING
);
998 /* These tokens should not be visible outside cpplib. */
999 case CPP_HEADER_NAME
:
1010 #define ERROR(msgid) do { error(msgid); goto syntax_error; } while(0)
1013 lex_number (str
, len
)
1019 int largest_digit
= 0;
1025 enum anon1
{ NOT_FLOAT
= 0, AFTER_POINT
, AFTER_EXPON
} floatflag
= NOT_FLOAT
;
1027 /* We actually store only HOST_BITS_PER_CHAR bits in each part.
1028 The code below which fills the parts array assumes that a host
1029 int is at least twice as wide as a host char, and that
1030 HOST_BITS_PER_WIDE_INT is an even multiple of HOST_BITS_PER_CHAR.
1031 Two HOST_WIDE_INTs is the largest int literal we can store.
1032 In order to detect overflow below, the number of parts (TOTAL_PARTS)
1033 must be exactly the number of parts needed to hold the bits
1034 of two HOST_WIDE_INTs. */
1035 #define TOTAL_PARTS ((HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR) * 2)
1036 unsigned int parts
[TOTAL_PARTS
];
1038 /* Optimize for most frequent case. */
1042 return integer_zero_node
;
1043 else if (*str
== '1')
1044 return integer_one_node
;
1046 return build_int_2 (*str
- '0', 0);
1049 for (count
= 0; count
< TOTAL_PARTS
; count
++)
1052 /* len is known to be >1 at this point. */
1055 if (len
> 2 && str
[0] == '0' && (str
[1] == 'x' || str
[1] == 'X'))
1060 /* The ISDIGIT check is so we are not confused by a suffix on 0. */
1061 else if (str
[0] == '0' && ISDIGIT (str
[1]))
1073 if (base
== 16 && pedantic
&& !flag_isoc99
)
1074 pedwarn ("floating constant may not be in radix 16");
1075 else if (floatflag
== AFTER_POINT
)
1076 ERROR ("too many decimal points in floating constant");
1077 else if (floatflag
== AFTER_EXPON
)
1078 ERROR ("decimal point in exponent - impossible!");
1080 floatflag
= AFTER_POINT
;
1086 /* Possible future extension: silently ignore _ in numbers,
1087 permitting cosmetic grouping - e.g. 0x8000_0000 == 0x80000000
1088 but somewhat easier to read. Ada has this? */
1089 ERROR ("underscore in number");
1093 /* It is not a decimal point.
1094 It should be a digit (perhaps a hex digit). */
1100 else if (base
<= 10 && (c
== 'e' || c
== 'E'))
1103 floatflag
= AFTER_EXPON
;
1106 else if (base
== 16 && (c
== 'p' || c
== 'P'))
1108 floatflag
= AFTER_EXPON
;
1109 break; /* start of exponent */
1111 else if (base
== 16 && c
>= 'a' && c
<= 'f')
1115 else if (base
== 16 && c
>= 'A' && c
<= 'F')
1122 break; /* start of suffix */
1125 if (n
>= largest_digit
)
1129 for (count
= 0; count
< TOTAL_PARTS
; count
++)
1131 parts
[count
] *= base
;
1135 += (parts
[count
-1] >> HOST_BITS_PER_CHAR
);
1137 &= (1 << HOST_BITS_PER_CHAR
) - 1;
1143 /* If the highest-order part overflows (gets larger than
1144 a host char will hold) then the whole number has
1145 overflowed. Record this and truncate the highest-order
1147 if (parts
[TOTAL_PARTS
- 1] >> HOST_BITS_PER_CHAR
)
1150 parts
[TOTAL_PARTS
- 1] &= (1 << HOST_BITS_PER_CHAR
) - 1;
1154 while (p
< str
+ len
);
1156 /* This can happen on input like `int i = 0x;' */
1158 ERROR ("numeric constant with no digits");
1160 if (largest_digit
>= base
)
1161 ERROR ("numeric constant contains digits beyond the radix");
1163 if (floatflag
!= NOT_FLOAT
)
1166 int imag
, fflag
, lflag
, conversion_errno
;
1167 REAL_VALUE_TYPE real
;
1168 struct pf_args args
;
1171 if (base
== 16 && floatflag
!= AFTER_EXPON
)
1172 ERROR ("hexadecimal floating constant has no exponent");
1174 /* Read explicit exponent if any, and put it in tokenbuf. */
1175 if ((base
== 10 && ((c
== 'e') || (c
== 'E')))
1176 || (base
== 16 && (c
== 'p' || c
== 'P')))
1180 if (p
< str
+ len
&& (c
== '+' || c
== '-'))
1182 /* Exponent is decimal, even if string is a hex float. */
1184 ERROR ("floating constant exponent has no digits");
1185 while (p
< str
+ len
&& ISDIGIT (c
))
1191 /* Copy the float constant now; we don't want any suffixes in the
1192 string passed to parse_float. */
1193 copy
= alloca (p
- str
+ 1);
1194 memcpy (copy
, str
, p
- str
);
1195 copy
[p
- str
] = '\0';
1197 /* Now parse suffixes. */
1198 fflag
= lflag
= imag
= 0;
1199 while (p
< str
+ len
)
1204 ERROR ("more than one 'f' suffix on floating constant");
1205 else if (warn_traditional
&& !in_system_header
)
1206 warning ("traditional C rejects the 'f' suffix");
1213 ERROR ("more than one 'l' suffix on floating constant");
1214 else if (warn_traditional
&& !in_system_header
)
1215 warning ("traditional C rejects the 'l' suffix");
1223 ERROR ("more than one 'i' or 'j' suffix on floating constant");
1225 pedwarn ("ISO C forbids imaginary numeric constants");
1230 ERROR ("invalid suffix on floating constant");
1233 /* Setup input for parse_float() */
1239 /* Convert string to a double, checking for overflow. */
1240 if (do_float_handler (parse_float
, (PTR
) &args
))
1242 /* Receive output from parse_float() */
1246 /* We got an exception from parse_float() */
1247 ERROR ("floating constant out of range");
1249 /* Receive output from parse_float() */
1250 conversion_errno
= args
.conversion_errno
;
1254 /* ERANGE is also reported for underflow,
1255 so test the value to distinguish overflow from that. */
1256 if (conversion_errno
== ERANGE
&& !flag_traditional
&& pedantic
1257 && (REAL_VALUES_LESS (dconst1
, real
)
1258 || REAL_VALUES_LESS (real
, dconstm1
)))
1259 warning ("floating point number exceeds range of 'double'");
1262 /* Create a node with determined type and value. */
1264 value
= build_complex (NULL_TREE
, convert (type
, integer_zero_node
),
1265 build_real (type
, real
));
1267 value
= build_real (type
, real
);
1271 tree trad_type
, ansi_type
, type
;
1272 HOST_WIDE_INT high
, low
;
1273 int spec_unsigned
= 0;
1275 int spec_long_long
= 0;
1280 trad_type
= ansi_type
= type
= NULL_TREE
;
1281 while (p
< str
+ len
)
1288 error ("two 'u' suffixes on integer constant");
1289 else if (warn_traditional
&& !in_system_header
)
1290 warning ("traditional C rejects the 'u' suffix");
1301 error ("three 'l' suffixes on integer constant");
1303 error ("'lul' is not a valid integer suffix");
1304 else if (c
!= spec_long
)
1305 error ("'Ll' and 'lL' are not valid integer suffixes");
1306 else if (pedantic
&& ! flag_isoc99
1307 && ! in_system_header
&& warn_long_long
)
1308 pedwarn ("ISO C89 forbids long long integer constants");
1314 case 'i': case 'I': case 'j': case 'J':
1316 error ("more than one 'i' or 'j' suffix on integer constant");
1318 pedwarn ("ISO C forbids imaginary numeric constants");
1323 ERROR ("invalid suffix on integer constant");
1327 /* If the literal overflowed, pedwarn about it now. */
1331 pedwarn ("integer constant is too large for this configuration of the compiler - truncated to %d bits", HOST_BITS_PER_WIDE_INT
* 2);
1334 /* This is simplified by the fact that our constant
1335 is always positive. */
1339 for (i
= 0; i
< HOST_BITS_PER_WIDE_INT
/ HOST_BITS_PER_CHAR
; i
++)
1341 high
|= ((HOST_WIDE_INT
) parts
[i
+ (HOST_BITS_PER_WIDE_INT
1342 / HOST_BITS_PER_CHAR
)]
1343 << (i
* HOST_BITS_PER_CHAR
));
1344 low
|= (HOST_WIDE_INT
) parts
[i
] << (i
* HOST_BITS_PER_CHAR
);
1347 value
= build_int_2 (low
, high
);
1348 TREE_TYPE (value
) = long_long_unsigned_type_node
;
1350 /* If warn_traditional, calculate both the ISO type and the
1351 traditional type, then see if they disagree.
1352 Otherwise, calculate only the type for the dialect in use. */
1353 if (warn_traditional
|| flag_traditional
)
1355 /* Calculate the traditional type. */
1356 /* Traditionally, any constant is signed; but if unsigned is
1357 specified explicitly, obey that. Use the smallest size
1358 with the right number of bits, except for one special
1359 case with decimal constants. */
1360 if (! spec_long
&& base
!= 10
1361 && int_fits_type_p (value
, unsigned_type_node
))
1362 trad_type
= spec_unsigned
? unsigned_type_node
: integer_type_node
;
1363 /* A decimal constant must be long if it does not fit in
1364 type int. I think this is independent of whether the
1365 constant is signed. */
1366 else if (! spec_long
&& base
== 10
1367 && int_fits_type_p (value
, integer_type_node
))
1368 trad_type
= spec_unsigned
? unsigned_type_node
: integer_type_node
;
1369 else if (! spec_long_long
)
1370 trad_type
= (spec_unsigned
1371 ? long_unsigned_type_node
1372 : long_integer_type_node
);
1373 else if (int_fits_type_p (value
,
1375 ? long_long_unsigned_type_node
1376 : long_long_integer_type_node
))
1377 trad_type
= (spec_unsigned
1378 ? long_long_unsigned_type_node
1379 : long_long_integer_type_node
);
1381 trad_type
= (spec_unsigned
1382 ? widest_unsigned_literal_type_node
1383 : widest_integer_literal_type_node
);
1385 if (warn_traditional
|| ! flag_traditional
)
1387 /* Calculate the ISO type. */
1388 if (! spec_long
&& ! spec_unsigned
1389 && int_fits_type_p (value
, integer_type_node
))
1390 ansi_type
= integer_type_node
;
1391 else if (! spec_long
&& (base
!= 10 || spec_unsigned
)
1392 && int_fits_type_p (value
, unsigned_type_node
))
1393 ansi_type
= unsigned_type_node
;
1394 else if (! spec_unsigned
&& !spec_long_long
1395 && int_fits_type_p (value
, long_integer_type_node
))
1396 ansi_type
= long_integer_type_node
;
1397 else if (! spec_long_long
1398 && int_fits_type_p (value
, long_unsigned_type_node
))
1399 ansi_type
= long_unsigned_type_node
;
1400 else if (! spec_unsigned
1401 && int_fits_type_p (value
, long_long_integer_type_node
))
1402 ansi_type
= long_long_integer_type_node
;
1403 else if (int_fits_type_p (value
, long_long_unsigned_type_node
))
1404 ansi_type
= long_long_unsigned_type_node
;
1405 else if (! spec_unsigned
1406 && int_fits_type_p (value
, widest_integer_literal_type_node
))
1407 ansi_type
= widest_integer_literal_type_node
;
1409 ansi_type
= widest_unsigned_literal_type_node
;
1412 type
= flag_traditional
? trad_type
: ansi_type
;
1414 /* We assume that constants specified in a non-decimal
1415 base are bit patterns, and that the programmer really
1416 meant what they wrote. */
1417 if (warn_traditional
&& !in_system_header
1418 && base
== 10 && trad_type
!= ansi_type
)
1420 if (TYPE_PRECISION (trad_type
) != TYPE_PRECISION (ansi_type
))
1421 warning ("width of integer constant changes with -traditional");
1422 else if (TREE_UNSIGNED (trad_type
) != TREE_UNSIGNED (ansi_type
))
1423 warning ("integer constant is unsigned in ISO C, signed with -traditional");
1425 warning ("width of integer constant may change on other systems with -traditional");
1428 if (pedantic
&& !flag_traditional
&& (flag_isoc99
|| !spec_long_long
)
1431 ? TYPE_PRECISION (long_long_integer_type_node
)
1432 : TYPE_PRECISION (long_integer_type_node
)) < TYPE_PRECISION (type
)))
1435 pedwarn ("integer constant larger than the maximum value of %s",
1437 ? (TREE_UNSIGNED (type
)
1438 ? "an unsigned long long int"
1439 : "a long long int")
1440 : "an unsigned long int"));
1443 if (base
== 10 && ! spec_unsigned
&& TREE_UNSIGNED (type
))
1444 warning ("decimal constant is so large that it is unsigned");
1448 if (TYPE_PRECISION (type
)
1449 <= TYPE_PRECISION (integer_type_node
))
1450 value
= build_complex (NULL_TREE
, integer_zero_node
,
1451 convert (integer_type_node
, value
));
1453 ERROR ("complex integer constant is too wide for 'complex int'");
1455 else if (flag_traditional
&& !int_fits_type_p (value
, type
))
1456 /* The traditional constant 0x80000000 is signed
1457 but doesn't fit in the range of int.
1458 This will change it to -0x80000000, which does fit. */
1460 TREE_TYPE (value
) = unsigned_type (type
);
1461 value
= convert (type
, value
);
1462 TREE_OVERFLOW (value
) = TREE_CONSTANT_OVERFLOW (value
) = 0;
1465 TREE_TYPE (value
) = type
;
1467 /* If it's still an integer (not a complex), and it doesn't
1468 fit in the type we choose for it, then pedwarn. */
1471 && TREE_CODE (TREE_TYPE (value
)) == INTEGER_TYPE
1472 && ! int_fits_type_p (value
, TREE_TYPE (value
)))
1473 pedwarn ("integer constant is larger than the maximum value for its type");
1477 error ("missing white space after number '%.*s'", (int) (p
- str
), str
);
1482 return integer_zero_node
;
1486 lex_string (str
, len
, wide
)
1492 char *buf
= alloca ((len
+ 1) * (wide
? WCHAR_BYTES
: 1));
1494 const char *p
= str
, *limit
= str
+ len
;
1496 unsigned width
= wide
? WCHAR_TYPE_SIZE
1497 : TYPE_PRECISION (char_type_node
);
1499 #ifdef MULTIBYTE_CHARS
1500 /* Reset multibyte conversion state. */
1501 (void) local_mbtowc (NULL_PTR
, NULL_PTR
, 0);
1506 #ifdef MULTIBYTE_CHARS
1510 char_len
= local_mbtowc (&wc
, p
, limit
- p
);
1513 warning ("Ignoring invalid multibyte character");
1526 if (c
== '\\' && !ignore_escape_flag
)
1528 p
= readescape (p
, limit
, &c
);
1529 if (width
< HOST_BITS_PER_INT
1530 && (unsigned) c
>= ((unsigned)1 << width
))
1531 pedwarn ("escape sequence out of range for character");
1534 /* Add this single character into the buffer either as a wchar_t
1535 or as a single byte. */
1538 unsigned charwidth
= TYPE_PRECISION (char_type_node
);
1539 unsigned bytemask
= (1 << charwidth
) - 1;
1542 for (byte
= 0; byte
< WCHAR_BYTES
; ++byte
)
1545 if (byte
>= (int) sizeof (c
))
1548 n
= (c
>> (byte
* charwidth
)) & bytemask
;
1549 if (BYTES_BIG_ENDIAN
)
1550 q
[WCHAR_BYTES
- byte
- 1] = n
;
1562 /* Terminate the string value, either with a single byte zero
1563 or with a wide zero. */
1567 memset (q
, 0, WCHAR_BYTES
);
1575 value
= build_string (q
- buf
, buf
);
1578 TREE_TYPE (value
) = wchar_array_type_node
;
1580 TREE_TYPE (value
) = char_array_type_node
;
1585 lex_charconst (str
, len
, wide
)
1590 const char *limit
= str
+ len
;
1594 unsigned width
= TYPE_PRECISION (char_type_node
);
1599 #ifdef MULTIBYTE_CHARS
1600 int longest_char
= local_mb_cur_max ();
1601 (void) local_mbtowc (NULL_PTR
, NULL_PTR
, 0);
1604 max_chars
= TYPE_PRECISION (integer_type_node
) / width
;
1606 width
= WCHAR_TYPE_SIZE
;
1610 #ifdef MULTIBYTE_CHARS
1614 char_len
= local_mbtowc (&wc
, str
, limit
- str
);
1617 warning ("Ignoring invalid multibyte character");
1633 str
= readescape (str
, limit
, &c
);
1634 if (width
< HOST_BITS_PER_INT
1635 && (unsigned) c
>= ((unsigned)1 << width
))
1636 pedwarn ("escape sequence out of range for character");
1638 #ifdef MAP_CHARACTER
1640 c
= MAP_CHARACTER (c
);
1643 /* Merge character into result; ignore excess chars. */
1644 num_chars
+= (width
/ TYPE_PRECISION (char_type_node
));
1645 if (num_chars
< max_chars
+ 1)
1647 if (width
< HOST_BITS_PER_INT
)
1648 result
= (result
<< width
) | (c
& ((1 << width
) - 1));
1654 if (chars_seen
== 0)
1655 error ("empty character constant");
1656 else if (num_chars
> max_chars
)
1658 num_chars
= max_chars
;
1659 error ("character constant too long");
1661 else if (chars_seen
!= 1 && ! flag_traditional
&& warn_multichar
)
1662 warning ("multi-character character constant");
1664 /* If char type is signed, sign-extend the constant. */
1667 int num_bits
= num_chars
* width
;
1669 /* We already got an error; avoid invalid shift. */
1670 value
= build_int_2 (0, 0);
1671 else if (TREE_UNSIGNED (char_type_node
)
1672 || ((result
>> (num_bits
- 1)) & 1) == 0)
1673 value
= build_int_2 (result
& (~(unsigned HOST_WIDE_INT
) 0
1674 >> (HOST_BITS_PER_WIDE_INT
- num_bits
)),
1677 value
= build_int_2 (result
| ~(~(unsigned HOST_WIDE_INT
) 0
1678 >> (HOST_BITS_PER_WIDE_INT
- num_bits
)),
1680 /* In C, a character constant has type 'int'; in C++, 'char'. */
1681 if (chars_seen
<= 1 && c_language
== clk_cplusplus
)
1682 TREE_TYPE (value
) = char_type_node
;
1684 TREE_TYPE (value
) = integer_type_node
;
1688 value
= build_int_2 (result
, 0);
1689 TREE_TYPE (value
) = wchar_type_node
;