1 /* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If
16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
17 Cambridge, MA 02139, USA. */
19 #include "../locale/localeinfo.h"
30 #define LONGLONG long long
35 /* Those are flags in the conversion format. */
36 # define LONG 0x001 /* l: long or double */
37 # define LONGDBL 0x002 /* L: long long or long double */
38 # define SHORT 0x004 /* h: short */
39 # define SUPPRESS 0x008 /* *: suppress assignment */
40 # define POINTER 0x010 /* weird %p pointer (`fake hex') */
41 # define NOSKIP 0x020 /* do not skip blanks */
42 # define WIDTH 0x040 /* width was given */
43 # define GROUP 0x080 /* ': group numbers */
44 # define MALLOC 0x100 /* a: malloc strings */
46 # define TYPEMOD (LONG|LONGDBL|SHORT)
53 # define va_list _IO_va_list
54 # define ungetc(c, s) (--read_in, _IO_ungetc (c, s))
55 # define inchar() ((c = _IO_getc_unlocked (s)), (void) ++read_in, c)
56 # define conv_error() do { \
57 if (errp != NULL) *errp |= 2; \
58 _IO_funlockfile (s); \
61 # define input_error() do { \
62 _IO_funlockfile (s); \
63 if (errp != NULL) *errp |= 1; \
66 # define memory_error() do { \
67 _IO_funlockfile (s); \
71 # define ARGCHECK(s, format) \
74 /* Check file argument for consistence. */ \
75 CHECK_FILE (s, EOF); \
76 if (s->_flags & _IO_NO_READS || format == NULL) \
82 # define LOCK_STREAM(S) \
83 __libc_cleanup_region_start ((void (*) (void *)) &_IO_funlockfile, (S)); \
85 # define UNLOCK_STREAM __libc_cleanup_region_end (1)
87 # define ungetc(c, s) (--read_in, ungetc (c, s))
88 # define inchar() ((c = getc (s)), (void) ++read_in, c)
89 # define conv_error() do { \
93 # define input_error() do { \
97 # define memory_error() do { \
102 # define ARGCHECK(s, format) \
105 /* Check file argument for consistence. */ \
106 if (!__validfp (s) || !s->__mode.__read || format == NULL) \
113 /* XXX For now !!! */
114 # define flockfile(S) /* nothing */
115 # define funlockfile(S) /* nothing */
116 # define LOCK_STREAM(S)
117 # define UNLOCK_STREAM
119 # define LOCK_STREAM(S) \
120 __libc_cleanup_region_start (&__funlockfile, (S)); \
122 # define UNLOCK_STREAM __libc_cleanup_region_start (1)
127 /* Read formatted input from S according to the format string
128 FORMAT, using the argument list in ARG.
129 Return the number of assignments made, or -1 for an input error. */
132 _IO_vfscanf (s
, format
, argptr
, errp
)
139 __vfscanf (FILE *s
, const char *format
, va_list argptr
)
142 va_list arg
= (va_list) argptr
;
144 register const char *f
= format
;
145 register unsigned char fc
; /* Current character of the format. */
146 register size_t done
= 0; /* Assignments done. */
147 register size_t read_in
= 0; /* Chars read in. */
148 register int c
; /* Last char read. */
149 register int width
; /* Maximum field width. */
150 register int flags
; /* Modifiers for current format element. */
152 /* Status for reading F-P nums. */
153 char got_dot
, got_e
, negative
;
154 /* If a [...] is a [^...]. */
156 /* Base for integral numbers. */
158 /* Signedness for integral numbers. */
160 /* Decimal point character. */
162 /* The thousands character of the current locale. */
164 /* Integral holding variables. */
168 unsigned long long int uq
;
170 unsigned long int ul
;
172 /* Character-buffer pointer. */
173 register char *str
, **strptr
;
175 /* We must not react on white spaces immediately because they can
176 possibly be matched even if in the input stream no character is
177 available anymore. */
180 char *tw
; /* Temporary pointer. */
181 char *wp
= NULL
; /* Workspace. */
182 size_t wpmax
= 0; /* Maximal size of workspace. */
183 size_t wpsize
; /* Currently used bytes in workspace. */
187 if (wpsize == wpmax) \
190 wpmax = UCHAR_MAX > 2 * wpmax ? UCHAR_MAX : 2 * wpmax; \
191 wp = (char *) alloca (wpmax); \
193 memcpy (wp, old, wpsize); \
195 wp[wpsize++] = (Ch); \
199 ARGCHECK (s
, format
);
201 /* Figure out the decimal point character. */
202 if (mbtowc (&decimal
, _NL_CURRENT (LC_NUMERIC
, DECIMAL_POINT
),
203 strlen (_NL_CURRENT (LC_NUMERIC
, DECIMAL_POINT
))) <= 0)
204 decimal
= (wchar_t) *_NL_CURRENT (LC_NUMERIC
, DECIMAL_POINT
);
205 /* Figure out the thousands separator character. */
206 if (mbtowc (&thousands
, _NL_CURRENT (LC_NUMERIC
, THOUSANDS_SEP
),
207 strlen (_NL_CURRENT (LC_NUMERIC
, THOUSANDS_SEP
))) <= 0)
208 thousands
= (wchar_t) *_NL_CURRENT (LC_NUMERIC
, THOUSANDS_SEP
);
210 /* Lock the stream. */
213 /* Run through the format string. */
217 /* Extract the next argument, which is of type TYPE.
218 For a %N$... spec, this is the Nth argument from the beginning;
219 otherwise it is the next argument after the state now in ARG. */
221 /* XXX Possible optimization. */
222 # define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
223 ({ va_list arg = (va_list) argptr; \
224 arg = (va_list) ((char *) arg \
226 * __va_rounded_size (void *)); \
227 va_arg (arg, type); \
230 # define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
231 ({ unsigned int pos = argpos; \
232 va_list arg = (va_list) argptr; \
234 (void) va_arg (arg, void *); \
235 va_arg (arg, type); \
241 /* Non-ASCII, may be a multibyte. */
242 int len
= mblen (f
, strlen (f
));
264 /* Remember to skip spaces. */
271 /* Read a character. */
274 /* Characters other than format specs must just match. */
278 /* We saw white space char as the last character in the format
279 string. Now it's time to skip all leading white space. */
296 /* This is the start of the conversion string. */
299 /* Initialize state of modifiers. */
302 /* Prepare temporary buffer. */
305 /* Check for a positional parameter specification. */
310 argpos
= argpos
* 10 + (*f
++ - '0');
315 /* Oops; that was actually the field width. */
323 /* Check for the assignment-suppressant and the number grouping flag. */
324 while (*f
== '*' || *f
== '\'')
335 /* We have seen width. */
339 /* Find the maximum field width. */
350 /* Check for type modifiers. */
351 while (*f
== 'h' || *f
== 'l' || *f
== 'L' || *f
== 'a' || *f
== 'q')
355 /* int's are short int's. */
357 /* Signal illegal format element. */
362 if (flags
& (SHORT
|LONGDBL
))
364 else if (flags
& LONG
)
366 /* A double `l' is equivalent to an `L'. */
371 /* int's are long int's. */
376 /* double's are long double's, and int's are long long int's. */
378 /* Signal illegal format element. */
384 /* Signal illegal format element. */
386 /* String conversions (%s, %[) take a `char **'
387 arg and fill it in with a malloc'd pointer. */
392 /* End of the format string? */
396 /* Find the conversion specifier. */
398 if (skip_space
|| (fc
!= '[' && fc
!= 'c' && fc
!= 'n'))
400 /* Eat whitespace. */
410 case '%': /* Must match a literal '%'. */
419 case 'n': /* Answer number of assignments done. */
420 /* Corrigendum 1 to ISO C 1990 describes the allowed flags
421 with the 'n' conversion specifier. */
422 if (!(flags
& SUPPRESS
))
423 /* Don't count the read-ahead. */
425 *ARG (long long int *) = read_in
;
426 else if (flags
& LONG
)
427 *ARG (long int *) = read_in
;
428 else if (flags
& SHORT
)
429 *ARG (short int *) = read_in
;
431 *ARG (int *) = read_in
;
434 case 'c': /* Match characters. */
435 if (!(flags
& SUPPRESS
))
449 if (!(flags
& SUPPRESS
))
453 while (--width
> 0 && inchar () != EOF
);
456 while (--width
> 0 && inchar () != EOF
);
459 /* I.e., EOF was read. */
462 if (!(flags
& SUPPRESS
))
467 case 's': /* Read a string. */
469 if (!(flags & SUPPRESS)) \
471 if (flags & MALLOC) \
473 /* The string is to be stored in a malloc'd buffer. */ \
474 strptr = ARG (char **); \
475 if (strptr == NULL) \
477 /* Allocate an initial buffer. */ \
479 *strptr = str = malloc (strsize); \
482 str = ARG (char *); \
499 #define STRING_ADD_CHAR(c) \
500 if (!(flags & SUPPRESS)) \
503 if ((flags & MALLOC) && str == *strptr + strsize) \
505 /* Enlarge the buffer. */ \
506 str = realloc (*strptr, strsize * 2); \
509 /* Can't allocate that much. Last-ditch effort. */\
510 str = realloc (*strptr, strsize + 1); \
513 /* We lose. Oh well. \
514 Terminate the string and stop converting, \
515 so at least we don't skip any input. */ \
516 (*strptr)[strsize] = '\0'; \
536 } while ((width
<= 0 || --width
> 0) && inchar () != EOF
);
538 if (!(flags
& SUPPRESS
))
545 case 'x': /* Hexadecimal integer. */
546 case 'X': /* Ditto. */
551 case 'o': /* Octal integer. */
556 case 'u': /* Unsigned decimal integer. */
561 case 'd': /* Signed decimal integer. */
566 case 'i': /* Generic number. */
575 /* Check for a sign. */
576 if (c
== '-' || c
== '+')
584 /* Look for a leading indication of base. */
585 if (width
!= 0 && c
== '0')
593 if (width
!= 0 && tolower (c
) == 'x')
611 /* Read the number into workspace. */
612 while (c
!= EOF
&& width
!= 0)
614 if (base
== 16 ? !isxdigit (c
) :
615 ((!isdigit (c
) || c
- '0' >= base
) &&
616 !((flags
& GROUP
) && base
== 10 && c
== thousands
)))
625 /* The just read character is not part of the number anymore. */
629 (wpsize
== 1 && (wp
[0] == '+' || wp
[0] == '-')))
630 /* There was no number. */
633 /* Convert the number. */
638 num
.q
= __strtoq_internal (wp
, &tw
, base
, flags
& GROUP
);
640 num
.uq
= __strtouq_internal (wp
, &tw
, base
, flags
& GROUP
);
645 num
.l
= __strtol_internal (wp
, &tw
, base
, flags
& GROUP
);
647 num
.ul
= __strtoul_internal (wp
, &tw
, base
, flags
& GROUP
);
652 if (!(flags
& SUPPRESS
))
657 *ARG (unsigned LONGLONG
int *) = num
.uq
;
658 else if (flags
& LONG
)
659 *ARG (unsigned long int *) = num
.ul
;
660 else if (flags
& SHORT
)
661 *ARG (unsigned short int *)
662 = (unsigned short int) num
.ul
;
664 *ARG (unsigned int *) = (unsigned int) num
.ul
;
669 *ARG (LONGLONG
int *) = num
.q
;
670 else if (flags
& LONG
)
671 *ARG (long int *) = num
.l
;
672 else if (flags
& SHORT
)
673 *ARG (short int *) = (short int) num
.l
;
675 *ARG (int *) = (int) num
.l
;
681 case 'e': /* Floating-point numbers. */
690 /* Check for a sign. */
691 if (c
== '-' || c
== '+')
694 if (inchar () == EOF
)
695 /* EOF is only an input error before we read any chars. */
708 else if (got_e
&& wp
[wpsize
- 1] == 'e'
709 && (c
== '-' || c
== '+'))
711 else if (wpsize
> 0 && !got_e
&& tolower (c
) == 'e')
716 else if (c
== decimal
&& !got_dot
)
721 else if ((flags
& GROUP
) && c
== thousands
&& !got_dot
)
728 while (inchar () != EOF
&& width
!= 0);
730 /* The last read character is not part of the number anymore. */
736 /* Convert the number. */
740 long double d
= __strtold_internal (wp
, &tw
, flags
& GROUP
);
741 if (!(flags
& SUPPRESS
) && tw
!= wp
)
742 *ARG (long double *) = negative
? -d
: d
;
744 else if (flags
& LONG
)
746 double d
= __strtod_internal (wp
, &tw
, flags
& GROUP
);
747 if (!(flags
& SUPPRESS
) && tw
!= wp
)
748 *ARG (double *) = negative
? -d
: d
;
752 float d
= __strtof_internal (wp
, &tw
, flags
& GROUP
);
753 if (!(flags
& SUPPRESS
) && tw
!= wp
)
754 *ARG (float *) = negative
? -d
: d
;
760 if (!(flags
& SUPPRESS
))
764 case '[': /* Character class. */
779 /* Fill WP with byte flags indexed by character.
780 We will use this flag map for matching input characters. */
781 if (wpmax
< UCHAR_MAX
)
784 wp
= (char *) alloca (wpmax
);
786 memset (wp
, 0, UCHAR_MAX
);
789 if (fc
== ']' || fc
== '-')
791 /* If ] or - appears before any char in the set, it is not
792 the terminator or separator, but the first char in the
798 while ((fc
= *f
++) != '\0' && fc
!= ']')
800 if (fc
== '-' && *f
!= '\0' && *f
!= ']' &&
801 (unsigned char) f
[-2] <= (unsigned char) *f
)
803 /* Add all characters from the one before the '-'
804 up to (but not including) the next format char. */
805 for (fc
= f
[-2]; fc
< *f
; ++fc
)
809 /* Add the character to the flag map. */
818 num
.ul
= read_in
- 1; /* -1 because we already read one char. */
830 while (width
!= 0 && inchar () != EOF
);
832 if (read_in
== num
.ul
)
835 if (!(flags
& SUPPRESS
))
842 case 'p': /* Generic pointer. */
844 /* A PTR must be the same size as a `long int'. */
845 flags
&= ~(SHORT
|LONGDBL
);
852 /* The last thing we saw int the format string was a white space.
853 Consume the last white spaces. */
870 __vfscanf (FILE *s
, const char *format
, va_list argptr
)
872 return _IO_vfscanf (s
, format
, argptr
, NULL
);
876 weak_alias (__vfscanf
, vfscanf
)