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 /* MULTIBYTE_CHARS support only works for native compilers.
40 ??? Ideally what we want is to model widechar support after
41 the current floating point support. */
43 #undef MULTIBYTE_CHARS
46 #ifdef MULTIBYTE_CHARS
49 #endif /* MULTIBYTE_CHARS */
50 #ifndef GET_ENVIRONMENT
51 #define GET_ENVIRONMENT(ENV_VALUE,ENV_NAME) ((ENV_VALUE) = getenv (ENV_NAME))
56 extern cpp_reader parse_in
;
57 extern cpp_options parse_options
;
59 /* Stream for reading from the input file. */
63 extern void yyprint
PARAMS ((FILE *, int, YYSTYPE
));
65 /* The elements of `ridpointers' are identifier nodes
66 for the reserved type names and storage classes.
67 It is indexed by a RID_... value. */
68 tree ridpointers
[(int) RID_MAX
];
70 /* Cause the `yydebug' variable to be defined. */
74 extern unsigned char *yy_cur
, *yy_lim
;
75 extern enum cpp_token cpp_token
;
77 extern int yy_get_token ();
79 #define GETC() (yy_cur < yy_lim ? *yy_cur++ : yy_get_token ())
80 #define UNGETC(c) ((c) == EOF ? 0 : yy_cur--)
82 #else /* ! USE_CPPLIB */
84 #define GETC() getch ()
85 #define UNGETC(c) put_back (c)
87 struct putback_buffer
{
88 unsigned char *buffer
;
93 static struct putback_buffer putback
= {NULL
, 0, -1};
95 static inline int getch
PARAMS ((void));
100 if (putback
.index
!= -1)
102 int ch
= putback
.buffer
[putback
.index
];
106 return getc (finput
);
109 static inline void put_back
PARAMS ((int));
117 if (putback
.index
== putback
.buffer_size
- 1)
119 putback
.buffer_size
+= 16;
120 putback
.buffer
= xrealloc (putback
.buffer
, putback
.buffer_size
);
122 putback
.buffer
[++putback
.index
] = ch
;
125 #endif /* ! USE_CPPLIB */
129 /* the declaration found for the last IDENTIFIER token read in.
130 yylex must look this up to detect typedefs, which get token type TYPENAME,
131 so it is left around in case the identifier is not a typedef but is
132 used in a context which makes it a reference to a variable. */
137 /* File used for outputting assembler code. */
138 extern FILE *asm_out_file
;
140 #undef WCHAR_TYPE_SIZE
141 #define WCHAR_TYPE_SIZE TYPE_PRECISION (wchar_type_node)
143 /* Number of bytes in a wide character. */
144 #define WCHAR_BYTES (WCHAR_TYPE_SIZE / BITS_PER_UNIT)
146 static int maxtoken
; /* Current nominal length of token buffer. */
147 char *token_buffer
; /* Pointer to token buffer.
148 Actual allocated length is maxtoken + 2.
149 This is not static because objc-parse.y uses it. */
151 static int indent_level
; /* Number of { minus number of }. */
153 /* Nonzero tells yylex to ignore \ in string constants. */
154 static int ignore_escape_flag
;
156 /* Nonzero if end-of-file has been seen on input. */
157 static int end_of_file
;
159 #ifdef HANDLE_GENERIC_PRAGMAS
160 static int handle_generic_pragma
PARAMS ((int));
161 #endif /* HANDLE_GENERIC_PRAGMAS */
162 static int whitespace_cr
PARAMS ((int));
163 static int skip_white_space
PARAMS ((int));
164 static char *extend_token_buffer
PARAMS ((const char *));
165 static int readescape
PARAMS ((int *));
166 static void parse_float
PARAMS ((PTR
));
167 static void extend_token_buffer_to
PARAMS ((int));
168 static int read_line_number
PARAMS ((int *));
170 /* Do not insert generated code into the source, instead, include it.
171 This allows us to build gcc automatically even for targets that
172 need to add or modify the reserved keyword lists. */
175 /* Return something to represent absolute declarators containing a *.
176 TARGET is the absolute declarator that the * contains.
177 TYPE_QUALS is a list of modifiers such as const or volatile
178 to apply to the pointer type, represented as identifiers.
180 We return an INDIRECT_REF whose "contents" are TARGET
181 and whose type is the modifier list. */
184 make_pointer_declarator (type_quals
, target
)
185 tree type_quals
, target
;
187 return build1 (INDIRECT_REF
, type_quals
, target
);
191 forget_protocol_qualifiers ()
193 int i
, n
= sizeof wordlist
/ sizeof (struct resword
);
195 for (i
= 0; i
< n
; i
++)
196 if ((int) wordlist
[i
].rid
>= (int) RID_IN
197 && (int) wordlist
[i
].rid
<= (int) RID_ONEWAY
)
198 wordlist
[i
].name
= "";
202 remember_protocol_qualifiers ()
204 int i
, n
= sizeof wordlist
/ sizeof (struct resword
);
206 for (i
= 0; i
< n
; i
++)
207 if (wordlist
[i
].rid
== RID_IN
)
208 wordlist
[i
].name
= "in";
209 else if (wordlist
[i
].rid
== RID_OUT
)
210 wordlist
[i
].name
= "out";
211 else if (wordlist
[i
].rid
== RID_INOUT
)
212 wordlist
[i
].name
= "inout";
213 else if (wordlist
[i
].rid
== RID_BYCOPY
)
214 wordlist
[i
].name
= "bycopy";
215 else if (wordlist
[i
].rid
== RID_BYREF
)
216 wordlist
[i
].name
= "byref";
217 else if (wordlist
[i
].rid
== RID_ONEWAY
)
218 wordlist
[i
].name
= "oneway";
222 init_parse (filename
)
223 const char *filename
;
226 /* Open input file. */
227 if (filename
== 0 || !strcmp (filename
, "-"))
233 finput
= fopen (filename
, "r");
235 pfatal_with_name (filename
);
237 #ifdef IO_BUFFER_SIZE
238 setvbuf (finput
, (char *) xmalloc (IO_BUFFER_SIZE
), _IOFBF
, IO_BUFFER_SIZE
);
240 #else /* !USE_CPPLIB */
241 parse_in
.show_column
= 1;
242 if (! cpp_start_read (&parse_in
, filename
))
245 if (filename
== 0 || !strcmp (filename
, "-"))
248 /* cpp_start_read always puts at least one line directive into the
249 token buffer. We must arrange to read it out here. */
250 yy_cur
= parse_in
.token_buffer
;
251 yy_lim
= CPP_PWRITTEN (&parse_in
);
252 cpp_token
= CPP_DIRECTIVE
;
265 cpp_finish (&parse_in
);
266 errorcount
+= parse_in
.errors
;
275 /* Make identifier nodes long enough for the language-specific slots. */
276 set_identifier_size (sizeof (struct lang_identifier
));
278 /* Start it at 0, because check_newline is called at the very beginning
279 and will increment it to 1. */
282 #ifdef MULTIBYTE_CHARS
283 /* Change to the native locale for multibyte conversions. */
284 setlocale (LC_CTYPE
, "");
285 GET_ENVIRONMENT (literal_codeset
, "LANG");
289 token_buffer
= (char *) xmalloc (maxtoken
+ 2);
291 ridpointers
[(int) RID_INT
] = get_identifier ("int");
292 ridpointers
[(int) RID_CHAR
] = get_identifier ("char");
293 ridpointers
[(int) RID_VOID
] = get_identifier ("void");
294 ridpointers
[(int) RID_FLOAT
] = get_identifier ("float");
295 ridpointers
[(int) RID_DOUBLE
] = get_identifier ("double");
296 ridpointers
[(int) RID_SHORT
] = get_identifier ("short");
297 ridpointers
[(int) RID_LONG
] = get_identifier ("long");
298 ridpointers
[(int) RID_UNSIGNED
] = get_identifier ("unsigned");
299 ridpointers
[(int) RID_SIGNED
] = get_identifier ("signed");
300 ridpointers
[(int) RID_INLINE
] = get_identifier ("inline");
301 ridpointers
[(int) RID_CONST
] = get_identifier ("const");
302 ridpointers
[(int) RID_RESTRICT
] = get_identifier ("restrict");
303 ridpointers
[(int) RID_VOLATILE
] = get_identifier ("volatile");
304 ridpointers
[(int) RID_BOUNDED
] = get_identifier ("__bounded");
305 ridpointers
[(int) RID_UNBOUNDED
] = get_identifier ("__unbounded");
306 ridpointers
[(int) RID_AUTO
] = get_identifier ("auto");
307 ridpointers
[(int) RID_STATIC
] = get_identifier ("static");
308 ridpointers
[(int) RID_EXTERN
] = get_identifier ("extern");
309 ridpointers
[(int) RID_TYPEDEF
] = get_identifier ("typedef");
310 ridpointers
[(int) RID_REGISTER
] = get_identifier ("register");
311 ridpointers
[(int) RID_ITERATOR
] = get_identifier ("iterator");
312 ridpointers
[(int) RID_COMPLEX
] = get_identifier ("complex");
313 ridpointers
[(int) RID_ID
] = get_identifier ("id");
314 ridpointers
[(int) RID_IN
] = get_identifier ("in");
315 ridpointers
[(int) RID_OUT
] = get_identifier ("out");
316 ridpointers
[(int) RID_INOUT
] = get_identifier ("inout");
317 ridpointers
[(int) RID_BYCOPY
] = get_identifier ("bycopy");
318 ridpointers
[(int) RID_BYREF
] = get_identifier ("byref");
319 ridpointers
[(int) RID_ONEWAY
] = get_identifier ("oneway");
320 forget_protocol_qualifiers();
322 /* Some options inhibit certain reserved words.
323 Clear those words out of the hash table so they won't be recognized. */
324 #define UNSET_RESERVED_WORD(STRING) \
325 do { struct resword *s = is_reserved_word (STRING, sizeof (STRING) - 1); \
326 if (s) s->name = ""; } while (0)
328 if (! doing_objc_thang
)
329 UNSET_RESERVED_WORD ("id");
331 if (flag_traditional
)
333 UNSET_RESERVED_WORD ("const");
334 UNSET_RESERVED_WORD ("restrict");
335 UNSET_RESERVED_WORD ("volatile");
336 UNSET_RESERVED_WORD ("typeof");
337 UNSET_RESERVED_WORD ("signed");
338 UNSET_RESERVED_WORD ("inline");
339 UNSET_RESERVED_WORD ("iterator");
340 UNSET_RESERVED_WORD ("complex");
342 else if (!flag_isoc99
)
343 UNSET_RESERVED_WORD ("restrict");
347 UNSET_RESERVED_WORD ("asm");
348 UNSET_RESERVED_WORD ("typeof");
349 UNSET_RESERVED_WORD ("inline");
350 UNSET_RESERVED_WORD ("iterator");
351 UNSET_RESERVED_WORD ("complex");
356 reinit_parse_for_function ()
360 /* Function used when yydebug is set, to print a token in more detail. */
363 yyprint (file
, yychar
, yylval
)
375 if (IDENTIFIER_POINTER (t
))
376 fprintf (file
, " `%s'", IDENTIFIER_POINTER (t
));
381 if (TREE_CODE (t
) == INTEGER_CST
)
383 #if HOST_BITS_PER_WIDE_INT == 64
384 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
387 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
394 #if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT
400 TREE_INT_CST_HIGH (t
), TREE_INT_CST_LOW (t
));
405 /* Iff C is a carriage return, warn about it - if appropriate -
406 and return nonzero. */
412 static int newline_warning
= 0;
416 /* ANSI C says the effects of a carriage return in a source file
418 if (pedantic
&& !newline_warning
)
420 warning ("carriage return in source file");
421 warning ("(we only warn about the first carriage return)");
429 /* If C is not whitespace, return C.
430 Otherwise skip whitespace and return first nonwhite char read. */
440 /* We don't recognize comments here, because
441 cpp output can include / and * consecutively as operators.
442 Also, there's no need, since cpp removes all comments. */
450 c
= check_newline ();
459 /* While processing a # directive we don't get CPP_HSPACE
460 tokens, so we also need to handle whitespace the normal way. */
461 if (cpp_token
== CPP_HSPACE
)
478 error ("stray '\\' in program");
488 /* Skips all of the white space at the current location in the input file. */
491 position_after_white_space ()
497 UNGETC (skip_white_space (c
));
500 /* Make the token buffer longer, preserving the data in it.
501 P should point to just beyond the last valid character in the old buffer.
502 The value we return is a pointer to the new buffer
503 at a place corresponding to P. */
506 extend_token_buffer_to (size
)
510 maxtoken
= maxtoken
* 2 + 10;
511 while (maxtoken
< size
);
512 token_buffer
= (char *) xrealloc (token_buffer
, maxtoken
+ 2);
516 extend_token_buffer (p
)
519 int offset
= p
- token_buffer
;
520 extend_token_buffer_to (offset
);
521 return token_buffer
+ offset
;
524 #if defined HANDLE_PRAGMA
525 /* Local versions of these macros, that can be passed as function pointers. */
541 read_line_number (num
)
544 register int token
= yylex ();
546 if (token
== CONSTANT
547 && TREE_CODE (yylval
.ttype
) == INTEGER_CST
)
549 *num
= TREE_INT_CST_LOW (yylval
.ttype
);
554 if (token
!= END_OF_LINE
)
555 error ("invalid #-line");
560 /* At the beginning of a line, increment the line number
561 and process any #-directive on this line.
562 If the line is a #-directive, read the entire line and return a newline.
563 Otherwise, return the line's first non-whitespace character.
565 Note that in the case of USE_CPPLIB, we get the whole line as one
566 CPP_DIRECTIVE token. */
574 enum { act_none
, act_push
, act_pop
} action
;
575 int old_lineno
, action_number
, l
;
578 /* Read first nonwhite char on the line. */
582 /* In some cases where we're leaving an include file, we can get multiple
583 CPP_HSPACE tokens in a row, so we need to loop. */
584 while (cpp_token
== CPP_HSPACE
)
589 while (c
== ' ' || c
== '\t');
596 /* Sequences of multiple newlines are very common; optimize them. */
600 /* If not #, return it so caller will use it. */
604 /* Don't read beyond this line. */
609 if (cpp_token
== CPP_VSPACE
)
611 /* Format is "<space> <line number> <filename> <newline>".
612 Only the line number is interesting, and even that
613 we can get more efficiently than scanning the line. */
615 lineno
= parse_in
.lineno
- 1;
622 if (token
== IDENTIFIER
)
624 /* If a letter follows, then if the word here is `line', skip
625 it and ignore it; otherwise, ignore the line, with an error
626 if the word isn't `pragma'. */
628 const char *name
= IDENTIFIER_POINTER (yylval
.ttype
);
630 if (!strcmp (name
, "pragma"))
633 if (token
!= IDENTIFIER
634 || TREE_CODE (yylval
.ttype
) != IDENTIFIER_NODE
)
638 /* We invoke HANDLE_PRAGMA before HANDLE_GENERIC_PRAGMAS
639 (if both are defined), in order to give the back
640 end a chance to override the interpretation of
641 SYSV style pragmas. */
642 if (HANDLE_PRAGMA (pragma_getc
, pragma_ungetc
,
643 IDENTIFIER_POINTER (yylval
.ttype
)))
645 #endif /* HANDLE_PRAGMA */
647 #ifdef HANDLE_GENERIC_PRAGMAS
648 if (handle_generic_pragma (token
))
650 #endif /* HANDLE_GENERIC_PRAGMAS */
652 /* Issue a warning message if we have been asked to do so.
653 Ignoring unknown pragmas in system header file unless
654 an explcit -Wunknown-pragmas has been given. */
655 if (warn_unknown_pragmas
> 1
656 || (warn_unknown_pragmas
&& ! in_system_header
))
657 warning ("ignoring pragma: %s", token_buffer
);
661 else if (!strcmp (name
, "define"))
663 debug_define (lineno
, GET_DIRECTIVE_LINE ());
666 else if (!strcmp (name
, "undef"))
668 debug_undef (lineno
, GET_DIRECTIVE_LINE ());
671 else if (!strcmp (name
, "line"))
677 else if (!strcmp (name
, "ident"))
679 /* #ident. The pedantic warning is now in cpp. */
681 /* Here we have just seen `#ident '.
682 A string constant should follow. */
685 if (token
== END_OF_LINE
)
688 || TREE_CODE (yylval
.ttype
) != STRING_CST
)
690 error ("invalid #ident");
696 #ifdef ASM_OUTPUT_IDENT
697 ASM_OUTPUT_IDENT (asm_out_file
,
698 TREE_STRING_POINTER (yylval
.ttype
));
702 /* Skip the rest of this line. */
706 error ("undefined or invalid # directive `%s'", name
);
710 /* If the # is the only nonwhite char on the line,
711 just ignore it. Check the new newline. */
712 if (token
== END_OF_LINE
)
716 /* Here we have either `#line' or `# <nonletter>'.
717 In either case, it should be a line number; a digit should follow. */
719 if (token
!= CONSTANT
720 || TREE_CODE (yylval
.ttype
) != INTEGER_CST
)
722 error ("invalid #-line");
726 /* subtract one, because it is the following line that
727 gets the specified number */
729 l
= TREE_INT_CST_LOW (yylval
.ttype
) - 1;
731 /* More follows: it must be a string constant (filename).
732 It would be neat to use cpplib to quickly process the string, but
733 (1) we don't have a handy tokenization of the string, and
734 (2) I don't know how well that would work in the presense
735 of filenames that contain wide characters. */
739 /* Don't treat \ as special if we are processing #line 1 "...".
740 If you want it to be treated specially, use # 1 "...". */
741 ignore_escape_flag
= 1;
744 /* Read the string constant. */
747 ignore_escape_flag
= 0;
749 if (token
== END_OF_LINE
)
751 /* No more: store the line number and check following line. */
756 if (token
!= STRING
|| TREE_CODE (yylval
.ttype
) != STRING_CST
)
758 error ("invalid #line");
762 input_filename
= TREE_STRING_POINTER (yylval
.ttype
);
764 if (main_input_filename
== 0)
765 main_input_filename
= input_filename
;
772 /* Each change of file name
773 reinitializes whether we are now in a system header. */
774 in_system_header
= 0;
776 if (!read_line_number (&action_number
))
778 /* Update the name in the top element of input_file_stack. */
779 if (input_file_stack
)
780 input_file_stack
->name
= input_filename
;
783 /* `1' after file name means entering new file.
784 `2' after file name means just left a file. */
786 if (action_number
== 1)
789 read_line_number (&action_number
);
791 else if (action_number
== 2)
794 read_line_number (&action_number
);
796 if (action_number
== 3)
798 /* `3' after file name means this is a system header file. */
799 in_system_header
= 1;
800 read_line_number (&action_number
);
803 /* Do the actions implied by the preceding numbers. */
805 if (action
== act_push
)
807 /* Pushing to a new file. */
809 = (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
810 input_file_stack
->line
= old_lineno
;
811 p
->next
= input_file_stack
;
812 p
->name
= input_filename
;
813 p
->indent_level
= indent_level
;
814 input_file_stack
= p
;
815 input_file_stack_tick
++;
816 debug_start_source_file (input_filename
);
818 else if (action
== act_pop
)
820 /* Popping out of a file. */
821 if (input_file_stack
->next
)
823 struct file_stack
*p
= input_file_stack
;
824 if (indent_level
!= p
->indent_level
)
826 warning_with_file_and_line
827 (p
->name
, old_lineno
,
828 "This file contains more `%c's than `%c's.",
829 indent_level
> p
->indent_level
? '{' : '}',
830 indent_level
> p
->indent_level
? '}' : '{');
832 input_file_stack
= p
->next
;
834 input_file_stack_tick
++;
835 debug_end_source_file (input_file_stack
->line
);
838 error ("#-lines for entering and leaving files don't match");
841 /* Now that we've pushed or popped the input stack,
842 update the name in the top element. */
843 if (input_file_stack
)
844 input_file_stack
->name
= input_filename
;
846 /* skip the rest of this line. */
853 while (c
!= '\n' && c
!= EOF
);
857 #ifdef HANDLE_GENERIC_PRAGMAS
859 /* Handle a #pragma directive.
860 TOKEN is the token we read after `#pragma'. Processes the entire input
861 line and return non-zero iff the pragma has been successfully parsed. */
863 /* This function has to be in this file, in order to get at
867 handle_generic_pragma (token
)
878 handle_pragma_token (token_buffer
, yylval
.ttype
);
882 return handle_pragma_token (NULL_PTR
, NULL_TREE
);
885 handle_pragma_token (token_buffer
, NULL
);
892 #endif /* HANDLE_GENERIC_PRAGMAS */
894 #define ENDFILE -1 /* token that represents end-of-file */
896 /* Read an escape sequence, returning its equivalent as a character,
897 or store 1 in *ignore_ptr if it is backslash-newline. */
900 readescape (ignore_ptr
)
903 register int c
= GETC();
905 register unsigned count
;
906 unsigned firstdig
= 0;
912 if (warn_traditional
)
913 warning ("the meaning of `\\x' varies with -traditional");
915 if (flag_traditional
)
930 if (c
>= 'a' && c
<= 'f')
931 code
+= c
- 'a' + 10;
932 if (c
>= 'A' && c
<= 'F')
933 code
+= c
- 'A' + 10;
934 if (c
>= '0' && c
<= '9')
936 if (code
!= 0 || count
!= 0)
946 warning ("\\x used with no following hex digits");
950 /* Digits are all 0's. Ok. */
952 else if ((count
- 1) * 4 >= TYPE_PRECISION (integer_type_node
)
955 << (TYPE_PRECISION (integer_type_node
)
958 pedwarn ("hex escape out of range");
961 case '0': case '1': case '2': case '3': case '4':
962 case '5': case '6': case '7':
965 while ((c
<= '7') && (c
>= '0') && (count
++ < 3))
967 code
= (code
* 8) + (c
- '0');
973 case '\\': case '\'': case '"':
982 return TARGET_NEWLINE
;
997 if (warn_traditional
)
998 warning ("the meaning of `\\a' varies with -traditional");
1000 if (flag_traditional
)
1005 #if 0 /* Vertical tab is present in common usage compilers. */
1006 if (flag_traditional
)
1014 pedwarn ("non-ANSI-standard escape sequence, `\\%c'", c
);
1020 /* `\(', etc, are used at beginning of line to avoid confusing Emacs. */
1024 /* `\%' is used to prevent SCCS from getting confused. */
1027 pedwarn ("unknown escape sequence `\\%c'", c
);
1031 pedwarn ("unknown escape sequence `\\%c'", c
);
1033 pedwarn ("unknown escape sequence: `\\' followed by char code 0x%x", c
);
1041 const char *string
= _(msgid
);
1043 /* We can't print string and character constants well
1044 because the token_buffer contains the result of processing escapes. */
1046 error ("%s at end of input", string
);
1047 else if (token_buffer
[0] == 0)
1048 error ("%s at null character", string
);
1049 else if (token_buffer
[0] == '"')
1050 error ("%s before string constant", string
);
1051 else if (token_buffer
[0] == '\'')
1052 error ("%s before character constant", string
);
1053 else if (!ISGRAPH(token_buffer
[0]))
1054 error ("%s before character 0%o", string
, (unsigned char) token_buffer
[0]);
1056 error ("%s before `%s'", string
, token_buffer
);
1066 char long_long_flag
;
1069 struct try_type type_sequence
[] =
1071 { &integer_type_node
, 0, 0, 0},
1072 { &unsigned_type_node
, 1, 0, 0},
1073 { &long_integer_type_node
, 0, 1, 0},
1074 { &long_unsigned_type_node
, 1, 1, 0},
1075 { &long_long_integer_type_node
, 0, 1, 1},
1076 { &long_long_unsigned_type_node
, 1, 1, 1}
1090 int conversion_errno
;
1091 REAL_VALUE_TYPE value
;
1098 struct pf_args
* args
= (struct pf_args
*) data
;
1099 int fflag
= 0, lflag
= 0;
1100 /* Copy token_buffer now, while it has just the number
1101 and not the suffixes; once we add `f' or `i',
1102 REAL_VALUE_ATOF may not work any more. */
1103 char *copy
= (char *) alloca (args
->p
- token_buffer
+ 1);
1104 bcopy (token_buffer
, copy
, args
->p
- token_buffer
+ 1);
1106 args
->conversion_errno
= 0;
1107 args
->type
= double_type_node
;
1113 /* Read the suffixes to choose a data type. */
1118 error ("more than one `f' in numeric constant");
1124 error ("more than one `l' in numeric constant");
1130 error ("more than one `i' or `j' in numeric constant");
1132 pedwarn ("ANSI C forbids imaginary numeric constants");
1143 if (args
->p
>= token_buffer
+ maxtoken
- 3)
1144 args
->p
= extend_token_buffer (args
->p
);
1145 *(args
->p
++) = args
->c
;
1150 /* The second argument, machine_mode, of REAL_VALUE_ATOF
1151 tells the desired precision of the binary result
1152 of decimal-to-binary conversion. */
1157 error ("both `f' and `l' in floating constant");
1159 args
->type
= float_type_node
;
1161 if (args
->base
== 16)
1162 args
->value
= REAL_VALUE_HTOF (copy
, TYPE_MODE (args
->type
));
1164 args
->value
= REAL_VALUE_ATOF (copy
, TYPE_MODE (args
->type
));
1165 args
->conversion_errno
= errno
;
1166 /* A diagnostic is required here by some ANSI C testsuites.
1167 This is not pedwarn, because some people don't want
1168 an error for this. */
1169 if (REAL_VALUE_ISINF (args
->value
) && pedantic
)
1170 warning ("floating point number exceeds range of `float'");
1174 args
->type
= long_double_type_node
;
1176 if (args
->base
== 16)
1177 args
->value
= REAL_VALUE_HTOF (copy
, TYPE_MODE (args
->type
));
1179 args
->value
= REAL_VALUE_ATOF (copy
, TYPE_MODE (args
->type
));
1180 args
->conversion_errno
= errno
;
1181 if (REAL_VALUE_ISINF (args
->value
) && pedantic
)
1182 warning ("floating point number exceeds range of `long double'");
1187 if (args
->base
== 16)
1188 args
->value
= REAL_VALUE_HTOF (copy
, TYPE_MODE (args
->type
));
1190 args
->value
= REAL_VALUE_ATOF (copy
, TYPE_MODE (args
->type
));
1191 args
->conversion_errno
= errno
;
1192 if (REAL_VALUE_ISINF (args
->value
) && pedantic
)
1193 warning ("floating point number exceeds range of `double'");
1197 /* Get the next character, staying within the current token if possible.
1198 If we're lexing a token, we don't want to look beyond the end of the
1199 token cpplib has prepared for us; otherwise, we end up reading in the
1200 next token, which screws up feed_input. So just return a null
1203 static inline int token_getch
PARAMS ((void));
1209 if (yy_cur
== yy_lim
)
1215 static inline void token_put_back
PARAMS ((int));
1228 /* Read a single token from the input stream, and assign it lexical
1242 /* Effectively do c = skip_white_space (c)
1243 but do it faster in the usual cases. */
1253 if (cpp_token
== CPP_HSPACE
)
1254 c
= yy_get_token ();
1261 /* Call skip_white_space so we can warn if appropriate. */
1266 c
= skip_white_space (c
);
1268 goto found_nonwhite
;
1272 token_buffer
[0] = c
;
1273 token_buffer
[1] = 0;
1275 /* yylloc.first_line = lineno; */
1281 token_buffer
[0] = 0;
1283 value
= END_OF_LINE
;
1290 if (cpp_token
== CPP_NAME
)
1293 /* Capital L may start a wide-string or wide-character constant. */
1295 register int c
= token_getch();
1304 goto string_constant
;
1311 if (!doing_objc_thang
)
1318 /* '@' may start a constant string object. */
1319 register int c
= token_getch ();
1323 goto string_constant
;
1326 /* Fall through to treat '@' as the start of an identifier. */
1329 case 'A': case 'B': case 'C': case 'D': case 'E':
1330 case 'F': case 'G': case 'H': case 'I': case 'J':
1331 case 'K': case 'M': case 'N': case 'O':
1332 case 'P': case 'Q': case 'R': case 'S': case 'T':
1333 case 'U': case 'V': case 'W': case 'X': case 'Y':
1335 case 'a': case 'b': case 'c': case 'd': case 'e':
1336 case 'f': case 'g': case 'h': case 'i': case 'j':
1337 case 'k': case 'l': case 'm': case 'n': case 'o':
1338 case 'p': case 'q': case 'r': case 's': case 't':
1339 case 'u': case 'v': case 'w': case 'x': case 'y':
1345 if (cpp_token
== CPP_NAME
)
1347 /* Note that one character has already been read from
1348 yy_cur into token_buffer. Also, cpplib complains about
1349 $ in identifiers, so we don't have to. */
1351 int len
= yy_lim
- yy_cur
+ 1;
1352 if (len
>= maxtoken
)
1353 extend_token_buffer_to (len
+ 1);
1354 memcpy (token_buffer
+ 1, yy_cur
, len
);
1355 p
= token_buffer
+ len
;
1362 while (ISALNUM (c
) || c
== '_' || c
== '$' || c
== '@')
1364 /* Make sure this char really belongs in an identifier. */
1367 if (! dollars_in_ident
)
1368 error ("`$' in identifier");
1370 pedwarn ("`$' in identifier");
1373 if (p
>= token_buffer
+ maxtoken
)
1374 p
= extend_token_buffer (p
);
1387 /* Try to recognize a keyword. Uses minimum-perfect hash function */
1390 register struct resword
*ptr
;
1392 if ((ptr
= is_reserved_word (token_buffer
, p
- token_buffer
)))
1395 yylval
.ttype
= ridpointers
[(int) ptr
->rid
];
1396 value
= (int) ptr
->token
;
1398 /* Only return OBJECTNAME if it is a typedef. */
1399 if (doing_objc_thang
&& value
== OBJECTNAME
)
1401 lastiddecl
= lookup_name(yylval
.ttype
);
1403 if (lastiddecl
== NULL_TREE
1404 || TREE_CODE (lastiddecl
) != TYPE_DECL
)
1408 /* Even if we decided to recognize asm, still perhaps warn. */
1410 && (value
== ASM_KEYWORD
|| value
== TYPEOF
1411 || ptr
->rid
== RID_INLINE
)
1412 && token_buffer
[0] != '_')
1413 pedwarn ("ANSI does not permit the keyword `%s'",
1418 /* If we did not find a keyword, look for an identifier
1421 if (value
== IDENTIFIER
)
1423 if (token_buffer
[0] == '@')
1424 error("invalid identifier `%s'", token_buffer
);
1426 yylval
.ttype
= get_identifier (token_buffer
);
1427 lastiddecl
= lookup_name (yylval
.ttype
);
1429 if (lastiddecl
!= 0 && TREE_CODE (lastiddecl
) == TYPE_DECL
)
1431 /* A user-invisible read-only initialized variable
1432 should be replaced by its value.
1433 We handle only strings since that's the only case used in C. */
1434 else if (lastiddecl
!= 0 && TREE_CODE (lastiddecl
) == VAR_DECL
1435 && DECL_IGNORED_P (lastiddecl
)
1436 && TREE_READONLY (lastiddecl
)
1437 && DECL_INITIAL (lastiddecl
) != 0
1438 && TREE_CODE (DECL_INITIAL (lastiddecl
)) == STRING_CST
)
1440 tree stringval
= DECL_INITIAL (lastiddecl
);
1442 /* Copy the string value so that we won't clobber anything
1443 if we put something in the TREE_CHAIN of this one. */
1444 yylval
.ttype
= build_string (TREE_STRING_LENGTH (stringval
),
1445 TREE_STRING_POINTER (stringval
));
1448 else if (doing_objc_thang
)
1450 tree objc_interface_decl
= is_class_name (yylval
.ttype
);
1452 if (objc_interface_decl
)
1455 yylval
.ttype
= objc_interface_decl
;
1464 if (yy_cur
< yy_lim
)
1467 /* It's hard to preserve tokenization on '.' because
1468 it could be a symbol by itself, or it could be the
1469 start of a floating point number and cpp won't tell us. */
1470 register int c1
= token_getch ();
1471 token_buffer
[1] = c1
;
1474 c1
= token_getch ();
1477 token_buffer
[2] = c1
;
1478 token_buffer
[3] = 0;
1482 error ("parse error at `..'");
1486 token_put_back (c1
);
1489 token_put_back (c1
);
1492 token_buffer
[1] = 0;
1496 /* Optimize for most frequent case. */
1501 cond
= (yy_cur
== yy_lim
);
1503 register int c1
= token_getch ();
1504 token_put_back (c1
);
1505 cond
= (! ISALNUM (c1
) && c1
!= '.');
1509 yylval
.ttype
= (c
== '0') ? integer_zero_node
: integer_one_node
;
1515 case '2': case '3': case '4':
1516 case '5': case '6': case '7': case '8': case '9':
1521 int largest_digit
= 0;
1525 /* We actually store only HOST_BITS_PER_CHAR bits in each part.
1526 The code below which fills the parts array assumes that a host
1527 int is at least twice as wide as a host char, and that
1528 HOST_BITS_PER_WIDE_INT is an even multiple of HOST_BITS_PER_CHAR.
1529 Two HOST_WIDE_INTs is the largest int literal we can store.
1530 In order to detect overflow below, the number of parts (TOTAL_PARTS)
1531 must be exactly the number of parts needed to hold the bits
1532 of two HOST_WIDE_INTs. */
1533 #define TOTAL_PARTS ((HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR) * 2)
1534 unsigned int parts
[TOTAL_PARTS
];
1536 enum anon1
{ NOT_FLOAT
, AFTER_POINT
, TOO_MANY_POINTS
, AFTER_EXPON
}
1537 floatflag
= NOT_FLOAT
;
1539 for (count
= 0; count
< TOTAL_PARTS
; count
++)
1547 *p
++ = (c
= token_getch());
1548 if ((c
== 'x') || (c
== 'X'))
1551 *p
++ = (c
= token_getch());
1553 /* Leading 0 forces octal unless the 0 is the only digit. */
1554 else if (c
>= '0' && c
<= '9')
1563 /* Read all the digits-and-decimal-points. */
1566 || (ISALNUM (c
) && c
!= 'l' && c
!= 'L'
1567 && c
!= 'u' && c
!= 'U'
1568 && c
!= 'i' && c
!= 'I' && c
!= 'j' && c
!= 'J'
1569 && (floatflag
== NOT_FLOAT
1570 || ((base
!= 16) && (c
!= 'f') && (c
!= 'F'))
1575 if (base
== 16 && pedantic
)
1576 pedwarn ("floating constant may not be in radix 16");
1577 if (floatflag
== TOO_MANY_POINTS
)
1578 /* We have already emitted an error. Don't need another. */
1580 else if (floatflag
== AFTER_POINT
|| floatflag
== AFTER_EXPON
)
1582 error ("malformed floating constant");
1583 floatflag
= TOO_MANY_POINTS
;
1584 /* Avoid another error from atof by forcing all characters
1585 from here on to be ignored. */
1589 floatflag
= AFTER_POINT
;
1593 *p
++ = c
= token_getch();
1594 /* Accept '.' as the start of a floating-point number
1595 only when it is followed by a digit. */
1596 if (p
== token_buffer
+ 2 && !ISDIGIT (c
))
1601 /* It is not a decimal point.
1602 It should be a digit (perhaps a hex digit). */
1608 else if (base
<= 10)
1610 if (c
== 'e' || c
== 'E')
1613 floatflag
= AFTER_EXPON
;
1614 break; /* start of exponent */
1616 error ("nondigits in number and not hexadecimal");
1619 else if (base
== 16 && (c
== 'p' || c
== 'P'))
1621 floatflag
= AFTER_EXPON
;
1622 break; /* start of exponent */
1624 else if (c
>= 'a' && c
<= 'f')
1632 if (c
>= largest_digit
)
1636 for (count
= 0; count
< TOTAL_PARTS
; count
++)
1638 parts
[count
] *= base
;
1642 += (parts
[count
-1] >> HOST_BITS_PER_CHAR
);
1644 &= (1 << HOST_BITS_PER_CHAR
) - 1;
1650 /* If the highest-order part overflows (gets larger than
1651 a host char will hold) then the whole number has
1652 overflowed. Record this and truncate the highest-order
1654 if (parts
[TOTAL_PARTS
- 1] >> HOST_BITS_PER_CHAR
)
1657 parts
[TOTAL_PARTS
- 1] &= (1 << HOST_BITS_PER_CHAR
) - 1;
1660 if (p
>= token_buffer
+ maxtoken
- 3)
1661 p
= extend_token_buffer (p
);
1662 *p
++ = (c
= token_getch());
1666 /* This can happen on input like `int i = 0x;' */
1668 error ("numeric constant with no digits");
1670 if (largest_digit
>= base
)
1671 error ("numeric constant contains digits beyond the radix");
1673 /* Remove terminating char from the token buffer and delimit the
1677 if (floatflag
!= NOT_FLOAT
)
1680 int imag
, conversion_errno
;
1681 REAL_VALUE_TYPE value
;
1682 struct pf_args args
;
1684 /* Read explicit exponent if any, and put it in tokenbuf. */
1686 if ((base
== 10 && ((c
== 'e') || (c
== 'E')))
1687 || (base
== 16 && (c
== 'p' || c
== 'P')))
1689 if (p
>= token_buffer
+ maxtoken
- 3)
1690 p
= extend_token_buffer (p
);
1693 if ((c
== '+') || (c
== '-'))
1698 /* Exponent is decimal, even if string is a hex float. */
1700 error ("floating constant exponent has no digits");
1703 if (p
>= token_buffer
+ maxtoken
- 3)
1704 p
= extend_token_buffer (p
);
1709 if (base
== 16 && floatflag
!= AFTER_EXPON
)
1710 error ("hexadecimal floating constant has no exponent");
1714 /* Setup input for parse_float() */
1719 /* Convert string to a double, checking for overflow. */
1720 if (do_float_handler (parse_float
, (PTR
) &args
))
1722 /* Receive output from parse_float() */
1727 /* We got an exception from parse_float() */
1728 error ("floating constant out of range");
1732 /* Receive output from parse_float() */
1736 conversion_errno
= args
.conversion_errno
;
1739 /* ERANGE is also reported for underflow,
1740 so test the value to distinguish overflow from that. */
1741 if (conversion_errno
== ERANGE
&& !flag_traditional
&& pedantic
1742 && (REAL_VALUES_LESS (dconst1
, value
)
1743 || REAL_VALUES_LESS (value
, dconstm1
)))
1744 warning ("floating point number exceeds range of `double'");
1747 /* If the result is not a number, assume it must have been
1748 due to some error message above, so silently convert
1750 if (REAL_VALUE_ISNAN (value
))
1753 /* Create a node with determined type and value. */
1755 yylval
.ttype
= build_complex (NULL_TREE
,
1756 convert (type
, integer_zero_node
),
1757 build_real (type
, value
));
1759 yylval
.ttype
= build_real (type
, value
);
1763 tree traditional_type
, ansi_type
, type
;
1764 HOST_WIDE_INT high
, low
;
1765 int spec_unsigned
= 0;
1767 int spec_long_long
= 0;
1771 traditional_type
= ansi_type
= type
= NULL_TREE
;
1774 if (c
== 'u' || c
== 'U')
1777 error ("two `u's in integer constant");
1780 else if (c
== 'l' || c
== 'L')
1785 error ("three `l's in integer constant");
1786 else if (pedantic
&& ! in_system_header
&& warn_long_long
)
1787 pedwarn ("ANSI C forbids long long integer constants");
1792 else if (c
== 'i' || c
== 'j' || c
== 'I' || c
== 'J')
1795 error ("more than one `i' or `j' in numeric constant");
1797 pedwarn ("ANSI C forbids imaginary numeric constants");
1802 if (p
>= token_buffer
+ maxtoken
- 3)
1803 p
= extend_token_buffer (p
);
1808 /* If the literal overflowed, pedwarn about it now. */
1812 pedwarn ("integer constant is too large for this configuration of the compiler - truncated to %d bits", HOST_BITS_PER_WIDE_INT
* 2);
1815 /* This is simplified by the fact that our constant
1816 is always positive. */
1820 for (i
= 0; i
< HOST_BITS_PER_WIDE_INT
/ HOST_BITS_PER_CHAR
; i
++)
1822 high
|= ((HOST_WIDE_INT
) parts
[i
+ (HOST_BITS_PER_WIDE_INT
1823 / HOST_BITS_PER_CHAR
)]
1824 << (i
* HOST_BITS_PER_CHAR
));
1825 low
|= (HOST_WIDE_INT
) parts
[i
] << (i
* HOST_BITS_PER_CHAR
);
1828 yylval
.ttype
= build_int_2 (low
, high
);
1829 TREE_TYPE (yylval
.ttype
) = long_long_unsigned_type_node
;
1831 /* If warn_traditional, calculate both the ANSI type and the
1832 traditional type, then see if they disagree.
1833 Otherwise, calculate only the type for the dialect in use. */
1834 if (warn_traditional
|| flag_traditional
)
1836 /* Calculate the traditional type. */
1837 /* Traditionally, any constant is signed;
1838 but if unsigned is specified explicitly, obey that.
1839 Use the smallest size with the right number of bits,
1840 except for one special case with decimal constants. */
1841 if (! spec_long
&& base
!= 10
1842 && int_fits_type_p (yylval
.ttype
, unsigned_type_node
))
1843 traditional_type
= (spec_unsigned
? unsigned_type_node
1844 : integer_type_node
);
1845 /* A decimal constant must be long
1846 if it does not fit in type int.
1847 I think this is independent of whether
1848 the constant is signed. */
1849 else if (! spec_long
&& base
== 10
1850 && int_fits_type_p (yylval
.ttype
, integer_type_node
))
1851 traditional_type
= (spec_unsigned
? unsigned_type_node
1852 : integer_type_node
);
1853 else if (! spec_long_long
)
1854 traditional_type
= (spec_unsigned
? long_unsigned_type_node
1855 : long_integer_type_node
);
1856 else if (int_fits_type_p (yylval
.ttype
,
1858 ? long_long_unsigned_type_node
1859 : long_long_integer_type_node
))
1860 traditional_type
= (spec_unsigned
1861 ? long_long_unsigned_type_node
1862 : long_long_integer_type_node
);
1864 traditional_type
= (spec_unsigned
1865 ? widest_unsigned_literal_type_node
1866 : widest_integer_literal_type_node
);
1868 if (warn_traditional
|| ! flag_traditional
)
1870 /* Calculate the ANSI type. */
1871 if (! spec_long
&& ! spec_unsigned
1872 && int_fits_type_p (yylval
.ttype
, integer_type_node
))
1873 ansi_type
= integer_type_node
;
1874 else if (! spec_long
&& (base
!= 10 || spec_unsigned
)
1875 && int_fits_type_p (yylval
.ttype
, unsigned_type_node
))
1876 ansi_type
= unsigned_type_node
;
1877 else if (! spec_unsigned
&& !spec_long_long
1878 && int_fits_type_p (yylval
.ttype
, long_integer_type_node
))
1879 ansi_type
= long_integer_type_node
;
1880 else if (! spec_long_long
1881 && int_fits_type_p (yylval
.ttype
,
1882 long_unsigned_type_node
))
1883 ansi_type
= long_unsigned_type_node
;
1884 else if (! spec_unsigned
1885 && int_fits_type_p (yylval
.ttype
,
1886 long_long_integer_type_node
))
1887 ansi_type
= long_long_integer_type_node
;
1888 else if (int_fits_type_p (yylval
.ttype
,
1889 long_long_unsigned_type_node
))
1890 ansi_type
= long_long_unsigned_type_node
;
1891 else if (! spec_unsigned
1892 && int_fits_type_p (yylval
.ttype
,
1893 widest_integer_literal_type_node
))
1894 ansi_type
= widest_integer_literal_type_node
;
1896 ansi_type
= widest_unsigned_literal_type_node
;
1899 type
= flag_traditional
? traditional_type
: ansi_type
;
1901 /* We assume that constants specified in a non-decimal
1902 base are bit patterns, and that the programmer really
1903 meant what they wrote. */
1904 if (warn_traditional
&& base
== 10
1905 && traditional_type
!= ansi_type
)
1907 if (TYPE_PRECISION (traditional_type
)
1908 != TYPE_PRECISION (ansi_type
))
1909 warning ("width of integer constant changes with -traditional");
1910 else if (TREE_UNSIGNED (traditional_type
)
1911 != TREE_UNSIGNED (ansi_type
))
1912 warning ("integer constant is unsigned in ANSI C, signed with -traditional");
1914 warning ("width of integer constant may change on other systems with -traditional");
1917 if (pedantic
&& !flag_traditional
&& !spec_long_long
&& !warn
1918 && (TYPE_PRECISION (long_integer_type_node
)
1919 < TYPE_PRECISION (type
)))
1922 pedwarn ("integer constant larger than the maximum value of an unsigned long int");
1925 if (base
== 10 && ! spec_unsigned
&& TREE_UNSIGNED (type
))
1926 warning ("decimal constant is so large that it is unsigned");
1930 if (TYPE_PRECISION (type
)
1931 <= TYPE_PRECISION (integer_type_node
))
1933 = build_complex (NULL_TREE
, integer_zero_node
,
1934 convert (integer_type_node
,
1937 error ("complex integer constant is too wide for `complex int'");
1939 else if (flag_traditional
&& !int_fits_type_p (yylval
.ttype
, type
))
1940 /* The traditional constant 0x80000000 is signed
1941 but doesn't fit in the range of int.
1942 This will change it to -0x80000000, which does fit. */
1944 TREE_TYPE (yylval
.ttype
) = unsigned_type (type
);
1945 yylval
.ttype
= convert (type
, yylval
.ttype
);
1946 TREE_OVERFLOW (yylval
.ttype
)
1947 = TREE_CONSTANT_OVERFLOW (yylval
.ttype
) = 0;
1950 TREE_TYPE (yylval
.ttype
) = type
;
1953 /* If it's still an integer (not a complex), and it doesn't
1954 fit in the type we choose for it, then pedwarn. */
1957 && TREE_CODE (TREE_TYPE (yylval
.ttype
)) == INTEGER_TYPE
1958 && ! int_fits_type_p (yylval
.ttype
, TREE_TYPE (yylval
.ttype
)))
1959 pedwarn ("integer constant is larger than the maximum value for its type");
1965 if (ISALNUM (c
) || c
== '.' || c
== '_' || c
== '$'
1966 || (!flag_traditional
&& (c
== '-' || c
== '+')
1967 && (p
[-1] == 'e' || p
[-1] == 'E')))
1968 error ("missing white space after number `%s'", token_buffer
);
1970 value
= CONSTANT
; break;
1976 register int result
= 0;
1977 register int num_chars
= 0;
1979 unsigned width
= TYPE_PRECISION (char_type_node
);
1981 #ifdef MULTIBYTE_CHARS
1982 int longest_char
= local_mb_cur_max ();
1983 (void) local_mbtowc (NULL_PTR
, NULL_PTR
, 0);
1986 max_chars
= TYPE_PRECISION (integer_type_node
) / width
;
1988 width
= WCHAR_TYPE_SIZE
;
1995 if (c
== '\'' || c
== EOF
)
2002 c
= readescape (&ignore
);
2005 if (width
< HOST_BITS_PER_INT
2006 && (unsigned) c
>= ((unsigned)1 << width
))
2007 pedwarn ("escape sequence out of range for character");
2008 #ifdef MAP_CHARACTER
2010 c
= MAP_CHARACTER (c
);
2016 pedwarn ("ANSI C forbids newline in character constant");
2021 #ifdef MULTIBYTE_CHARS
2025 for (i
= 1; i
<= longest_char
; ++i
)
2027 if (i
> maxtoken
- 4)
2028 extend_token_buffer (token_buffer
);
2030 token_buffer
[i
] = c
;
2031 char_len
= local_mbtowc (& wc
,
2040 /* mbtowc sometimes needs an extra char before accepting */
2045 /* Merge character into result; ignore excess chars. */
2046 for (i
= 1; i
<= char_len
; ++i
)
2050 if (width
< HOST_BITS_PER_INT
)
2051 result
= (result
<< width
)
2053 & ((1 << width
) - 1));
2055 result
= token_buffer
[i
];
2057 num_chars
+= char_len
;
2066 warning ("Ignoring invalid multibyte character");
2067 /* Replace all but the first byte. */
2068 for (--i
; i
> 1; --i
)
2069 token_put_back (token_buffer
[i
]);
2070 wc
= token_buffer
[1];
2072 #ifdef MAP_CHARACTER
2073 c
= MAP_CHARACTER (wc
);
2078 #else /* ! MULTIBYTE_CHARS */
2079 #ifdef MAP_CHARACTER
2080 c
= MAP_CHARACTER (c
);
2082 #endif /* ! MULTIBYTE_CHARS */
2087 if (chars_seen
== 1) /* only keep the first one */
2092 /* Merge character into result; ignore excess chars. */
2093 num_chars
+= (width
/ TYPE_PRECISION (char_type_node
));
2094 if (num_chars
< max_chars
+ 1)
2096 if (width
< HOST_BITS_PER_INT
)
2097 result
= (result
<< width
) | (c
& ((1 << width
) - 1));
2104 error ("malformed character constant");
2105 else if (chars_seen
== 0)
2106 error ("empty character constant");
2107 else if (num_chars
> max_chars
)
2109 num_chars
= max_chars
;
2110 error ("character constant too long");
2112 else if (chars_seen
!= 1 && ! flag_traditional
&& warn_multichar
)
2113 warning ("multi-character character constant");
2115 /* If char type is signed, sign-extend the constant. */
2118 int num_bits
= num_chars
* width
;
2120 /* We already got an error; avoid invalid shift. */
2121 yylval
.ttype
= build_int_2 (0, 0);
2122 else if (TREE_UNSIGNED (char_type_node
)
2123 || ((result
>> (num_bits
- 1)) & 1) == 0)
2125 = build_int_2 (result
& (~(unsigned HOST_WIDE_INT
) 0
2126 >> (HOST_BITS_PER_WIDE_INT
- num_bits
)),
2130 = build_int_2 (result
| ~(~(unsigned HOST_WIDE_INT
) 0
2131 >> (HOST_BITS_PER_WIDE_INT
- num_bits
)),
2133 TREE_TYPE (yylval
.ttype
) = integer_type_node
;
2137 yylval
.ttype
= build_int_2 (result
, 0);
2138 TREE_TYPE (yylval
.ttype
) = wchar_type_node
;
2148 unsigned width
= wide_flag
? WCHAR_TYPE_SIZE
2149 : TYPE_PRECISION (char_type_node
);
2150 #ifdef MULTIBYTE_CHARS
2151 int longest_char
= local_mb_cur_max ();
2152 (void) local_mbtowc (NULL_PTR
, NULL_PTR
, 0);
2155 p
= token_buffer
+ 1;
2157 while (c
!= '"' && c
!= EOF
)
2159 /* ignore_escape_flag is set for reading the filename in #line. */
2160 if (!ignore_escape_flag
&& c
== '\\')
2163 c
= readescape (&ignore
);
2166 if (width
< HOST_BITS_PER_INT
2167 && (unsigned) c
>= ((unsigned)1 << width
))
2168 pedwarn ("escape sequence out of range for character");
2173 pedwarn ("ANSI C forbids newline in string constant");
2178 #ifdef MULTIBYTE_CHARS
2182 for (i
= 0; i
< longest_char
; ++i
)
2184 if (p
+ i
>= token_buffer
+ maxtoken
)
2185 p
= extend_token_buffer (p
);
2188 char_len
= local_mbtowc (& wc
, p
, i
+ 1);
2195 warning ("Ignoring invalid multibyte character");
2196 /* Replace all except the first byte. */
2198 for (--i
; i
> 0; --i
)
2199 token_put_back (p
[i
]);
2202 /* mbtowc sometimes needs an extra char before accepting */
2212 #endif /* MULTIBYTE_CHARS */
2215 /* Add this single character into the buffer either as a wchar_t
2216 or as a single byte. */
2219 unsigned width
= TYPE_PRECISION (char_type_node
);
2220 unsigned bytemask
= (1 << width
) - 1;
2223 if (p
+ WCHAR_BYTES
> token_buffer
+ maxtoken
)
2224 p
= extend_token_buffer (p
);
2226 for (byte
= 0; byte
< WCHAR_BYTES
; ++byte
)
2229 if (byte
>= (int) sizeof (c
))
2232 value
= (c
>> (byte
* width
)) & bytemask
;
2233 if (BYTES_BIG_ENDIAN
)
2234 p
[WCHAR_BYTES
- byte
- 1] = value
;
2242 if (p
>= token_buffer
+ maxtoken
)
2243 p
= extend_token_buffer (p
);
2251 /* Terminate the string value, either with a single byte zero
2252 or with a wide zero. */
2255 if (p
+ WCHAR_BYTES
> token_buffer
+ maxtoken
)
2256 p
= extend_token_buffer (p
);
2257 bzero (p
, WCHAR_BYTES
);
2262 if (p
>= token_buffer
+ maxtoken
)
2263 p
= extend_token_buffer (p
);
2268 error ("Unterminated string constant");
2270 /* We have read the entire constant.
2271 Construct a STRING_CST for the result. */
2275 yylval
.ttype
= build_string (p
- (token_buffer
+ 1),
2277 TREE_TYPE (yylval
.ttype
) = wchar_array_type_node
;
2282 /* Return an Objective-C @"..." constant string object. */
2283 yylval
.ttype
= build_objc_string (p
- (token_buffer
+ 1),
2285 TREE_TYPE (yylval
.ttype
) = char_array_type_node
;
2286 value
= OBJC_STRING
;
2290 yylval
.ttype
= build_string (p
- (token_buffer
+ 1),
2292 TREE_TYPE (yylval
.ttype
) = char_array_type_node
;
2320 yylval
.code
= PLUS_EXPR
; break;
2322 yylval
.code
= MINUS_EXPR
; break;
2324 yylval
.code
= BIT_AND_EXPR
; break;
2326 yylval
.code
= BIT_IOR_EXPR
; break;
2328 yylval
.code
= MULT_EXPR
; break;
2330 yylval
.code
= TRUNC_DIV_EXPR
; break;
2332 yylval
.code
= TRUNC_MOD_EXPR
; break;
2334 yylval
.code
= BIT_XOR_EXPR
; break;
2336 yylval
.code
= LSHIFT_EXPR
; break;
2338 yylval
.code
= RSHIFT_EXPR
; break;
2340 yylval
.code
= LT_EXPR
; break;
2342 yylval
.code
= GT_EXPR
; break;
2345 token_buffer
[1] = c1
= token_getch();
2346 token_buffer
[2] = 0;
2353 value
= ARITHCOMPARE
; yylval
.code
= LE_EXPR
; goto done
;
2355 value
= ARITHCOMPARE
; yylval
.code
= GE_EXPR
; goto done
;
2357 value
= EQCOMPARE
; yylval
.code
= NE_EXPR
; goto done
;
2359 value
= EQCOMPARE
; yylval
.code
= EQ_EXPR
; goto done
;
2361 value
= ASSIGN
; goto done
;
2367 value
= PLUSPLUS
; goto done
;
2369 value
= MINUSMINUS
; goto done
;
2371 value
= ANDAND
; goto done
;
2373 value
= OROR
; goto done
;
2386 { value
= POINTSAT
; goto done
; }
2392 { value
= ']'; goto done
; }
2396 { value
= '{'; indent_level
++; goto done
; }
2398 { value
= '['; goto done
; }
2402 { value
= '}'; indent_level
--; goto done
; }
2406 token_put_back (c1
);
2407 token_buffer
[1] = 0;
2409 if ((c
== '<') || (c
== '>'))
2410 value
= ARITHCOMPARE
;
2416 /* Don't make yyparse think this is eof. */
2435 /* yylloc.last_line = lineno; */
2440 /* Sets the value of the 'yydebug' variable to VALUE.
2441 This is a function so we don't have to have YYDEBUG defined
2442 in order to build the compiler. */
2451 warning ("YYDEBUG not defined.");