1278 lines
31 KiB
C
1278 lines
31 KiB
C
/* Copyright (C) 1991,92,93,94,95,96,97,98 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <limits.h>
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#include <ctype.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wctype.h>
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#include <bits/libc-lock.h>
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#include <locale/localeinfo.h>
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#ifdef __GNUC__
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# define HAVE_LONGLONG
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# define LONGLONG long long
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#else
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# define LONGLONG long
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#endif
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/* Those are flags in the conversion format. */
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# define LONG 0x001 /* l: long or double */
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# define LONGDBL 0x002 /* L: long long or long double */
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# define SHORT 0x004 /* h: short */
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# define SUPPRESS 0x008 /* *: suppress assignment */
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# define POINTER 0x010 /* weird %p pointer (`fake hex') */
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# define NOSKIP 0x020 /* do not skip blanks */
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# define WIDTH 0x040 /* width was given */
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# define GROUP 0x080 /* ': group numbers */
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# define MALLOC 0x100 /* a: malloc strings */
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# define CHAR 0x200 /* hh: char */
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#ifdef USE_IN_LIBIO
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# include <libioP.h>
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# include <libio.h>
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# undef va_list
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# define va_list _IO_va_list
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# define ungetc(c, s) ((void) ((int) c == EOF \
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|| (--read_in, \
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_IO_sputbackc (s, (unsigned char) c))))
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# define inchar() (c == EOF ? EOF \
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: ((c = _IO_getc_unlocked (s)), \
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(void) (c != EOF && ++read_in), c))
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# define encode_error() do { \
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if (errp != NULL) *errp |= 4; \
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_IO_funlockfile (s); \
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__libc_cleanup_end (0); \
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__set_errno (EILSEQ); \
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return done; \
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} while (0)
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# define conv_error() do { \
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if (errp != NULL) *errp |= 2; \
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_IO_funlockfile (s); \
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__libc_cleanup_end (0); \
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return done; \
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} while (0)
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# define input_error() do { \
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_IO_funlockfile (s); \
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if (errp != NULL) *errp |= 1; \
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__libc_cleanup_end (0); \
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return done ?: EOF; \
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} while (0)
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# define memory_error() do { \
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_IO_funlockfile (s); \
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__set_errno (ENOMEM); \
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__libc_cleanup_end (0); \
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return EOF; \
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} while (0)
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# define ARGCHECK(s, format) \
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do \
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{ \
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/* Check file argument for consistence. */ \
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CHECK_FILE (s, EOF); \
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if (s->_flags & _IO_NO_READS) \
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{ \
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__set_errno (EBADF); \
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return EOF; \
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} \
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else if (format == NULL) \
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{ \
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MAYBE_SET_EINVAL; \
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return EOF; \
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} \
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} while (0)
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# define LOCK_STREAM(S) \
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__libc_cleanup_region_start ((void (*) (void *)) &_IO_funlockfile, (S)); \
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_IO_flockfile (S)
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# define UNLOCK_STREAM(S) \
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_IO_funlockfile (S); \
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__libc_cleanup_region_end (0)
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#else
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# define ungetc(c, s) ((void) (c != EOF && --read_in), ungetc (c, s))
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# define inchar() (c == EOF ? EOF \
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: ((c = getc (s)), (void) (c != EOF && ++read_in), c))
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# define encode_error() do { \
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funlockfile (s); \
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__set_errno (EILSEQ); \
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return done; \
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} while (0)
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# define conv_error() do { \
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funlockfile (s); \
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return done; \
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} while (0)
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# define input_error() do { \
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funlockfile (s); \
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return done ?: EOF; \
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} while (0)
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# define memory_error() do { \
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funlockfile (s); \
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__set_errno (ENOMEM); \
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return EOF; \
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} while (0)
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# define ARGCHECK(s, format) \
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do \
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{ \
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/* Check file argument for consistence. */ \
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if (!__validfp (s) || !s->__mode.__read) \
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{ \
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__set_errno (EBADF); \
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return EOF; \
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} \
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else if (format == NULL) \
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{ \
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__set_errno (EINVAL); \
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return EOF; \
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} \
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} while (0)
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#if 1
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/* XXX For now !!! */
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# define flockfile(S) /* nothing */
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# define funlockfile(S) /* nothing */
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# define LOCK_STREAM(S)
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# define UNLOCK_STREAM(S)
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#else
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# define LOCK_STREAM(S) \
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__libc_cleanup_region_start (&__funlockfile, (S)); \
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__flockfile (S)
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# define UNLOCK_STREAM(S) \
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__funlockfile (S); \
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__libc_cleanup_region_end (0)
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#endif
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#endif
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/* Read formatted input from S according to the format string
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FORMAT, using the argument list in ARG.
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Return the number of assignments made, or -1 for an input error. */
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#ifdef USE_IN_LIBIO
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int
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_IO_vfscanf (s, format, argptr, errp)
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_IO_FILE *s;
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const char *format;
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_IO_va_list argptr;
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int *errp;
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#else
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int
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__vfscanf (FILE *s, const char *format, va_list argptr)
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#endif
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{
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va_list arg;
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register const char *f = format;
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register unsigned char fc; /* Current character of the format. */
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register size_t done = 0; /* Assignments done. */
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register size_t read_in = 0; /* Chars read in. */
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register int c = 0; /* Last char read. */
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register int width; /* Maximum field width. */
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register int flags; /* Modifiers for current format element. */
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/* Status for reading F-P nums. */
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char got_dot, got_e, negative;
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/* If a [...] is a [^...]. */
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char not_in;
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#define exp_char not_in
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/* Base for integral numbers. */
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int base;
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/* Signedness for integral numbers. */
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int number_signed;
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#define is_hexa number_signed
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/* Decimal point character. */
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wchar_t decimal;
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/* The thousands character of the current locale. */
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wchar_t thousands;
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/* Integral holding variables. */
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union
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{
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long long int q;
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unsigned long long int uq;
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long int l;
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unsigned long int ul;
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} num;
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/* Character-buffer pointer. */
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char *str = NULL;
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wchar_t *wstr = NULL;
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char **strptr = NULL;
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size_t strsize = 0;
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/* We must not react on white spaces immediately because they can
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possibly be matched even if in the input stream no character is
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available anymore. */
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int skip_space = 0;
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/* Nonzero if we are reading a pointer. */
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int read_pointer;
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/* Workspace. */
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char *tw; /* Temporary pointer. */
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char *wp = NULL; /* Workspace. */
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size_t wpmax = 0; /* Maximal size of workspace. */
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size_t wpsize; /* Currently used bytes in workspace. */
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#define ADDW(Ch) \
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do \
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{ \
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if (wpsize == wpmax) \
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{ \
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char *old = wp; \
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wpmax = UCHAR_MAX > 2 * wpmax ? UCHAR_MAX : 2 * wpmax; \
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wp = (char *) alloca (wpmax); \
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if (old != NULL) \
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memcpy (wp, old, wpsize); \
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} \
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wp[wpsize++] = (Ch); \
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} \
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while (0)
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#ifdef __va_copy
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__va_copy (arg, argptr);
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#else
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arg = (va_list) argptr;
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#endif
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ARGCHECK (s, format);
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/* Figure out the decimal point character. */
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if (mbtowc (&decimal, _NL_CURRENT (LC_NUMERIC, DECIMAL_POINT),
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strlen (_NL_CURRENT (LC_NUMERIC, DECIMAL_POINT))) <= 0)
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decimal = (wchar_t) *_NL_CURRENT (LC_NUMERIC, DECIMAL_POINT);
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/* Figure out the thousands separator character. */
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if (mbtowc (&thousands, _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP),
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strlen (_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP))) <= 0)
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thousands = (wchar_t) *_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
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/* Lock the stream. */
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LOCK_STREAM (s);
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/* Run through the format string. */
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while (*f != '\0')
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{
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unsigned int argpos;
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/* Extract the next argument, which is of type TYPE.
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For a %N$... spec, this is the Nth argument from the beginning;
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otherwise it is the next argument after the state now in ARG. */
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#ifdef __va_copy
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# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
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({ unsigned int pos = argpos; \
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va_list arg; \
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__va_copy (arg, argptr); \
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while (--pos > 0) \
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(void) va_arg (arg, void *); \
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va_arg (arg, type); \
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}))
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#else
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# if 0
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/* XXX Possible optimization. */
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# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
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({ va_list arg = (va_list) argptr; \
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arg = (va_list) ((char *) arg \
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+ (argpos - 1) \
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* __va_rounded_size (void *)); \
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va_arg (arg, type); \
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}))
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# else
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# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
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({ unsigned int pos = argpos; \
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va_list arg = (va_list) argptr; \
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while (--pos > 0) \
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(void) va_arg (arg, void *); \
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va_arg (arg, type); \
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}))
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# endif
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#endif
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if (!isascii (*f))
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{
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/* Non-ASCII, may be a multibyte. */
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int len = mblen (f, strlen (f));
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if (len > 0)
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{
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do
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{
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c = inchar ();
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if (c == EOF)
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input_error ();
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else if (c != *f++)
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{
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ungetc (c, s);
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conv_error ();
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}
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}
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while (--len > 0);
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continue;
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}
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}
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fc = *f++;
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if (fc != '%')
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{
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/* Remember to skip spaces. */
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if (isspace (fc))
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{
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skip_space = 1;
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continue;
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}
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/* Read a character. */
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c = inchar ();
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/* Characters other than format specs must just match. */
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if (c == EOF)
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input_error ();
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/* We saw white space char as the last character in the format
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string. Now it's time to skip all leading white space. */
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if (skip_space)
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{
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while (isspace (c))
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if (inchar () == EOF && errno == EINTR)
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conv_error ();
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skip_space = 0;
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}
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if (c != fc)
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{
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ungetc (c, s);
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conv_error ();
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}
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continue;
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}
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/* This is the start of the conversion string. */
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flags = 0;
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/* Not yet decided whether we read a pointer or not. */
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read_pointer = 0;
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/* Initialize state of modifiers. */
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argpos = 0;
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/* Prepare temporary buffer. */
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wpsize = 0;
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/* Check for a positional parameter specification. */
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if (isdigit (*f))
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{
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argpos = *f++ - '0';
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while (isdigit (*f))
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argpos = argpos * 10 + (*f++ - '0');
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if (*f == '$')
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++f;
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else
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{
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/* Oops; that was actually the field width. */
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width = argpos;
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flags |= WIDTH;
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argpos = 0;
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goto got_width;
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}
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}
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/* Check for the assignment-suppressing and the number grouping flag. */
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while (*f == '*' || *f == '\'')
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switch (*f++)
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{
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case '*':
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flags |= SUPPRESS;
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break;
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case '\'':
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flags |= GROUP;
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break;
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}
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|
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/* We have seen width. */
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if (isdigit (*f))
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flags |= WIDTH;
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|
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/* Find the maximum field width. */
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width = 0;
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while (isdigit (*f))
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{
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width *= 10;
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width += *f++ - '0';
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}
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got_width:
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if (width == 0)
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width = -1;
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|
|
/* Check for type modifiers. */
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switch (*f++)
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{
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case 'h':
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/* ints are short ints or chars. */
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if (*f == 'h')
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{
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++f;
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flags |= CHAR;
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}
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else
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flags |= SHORT;
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break;
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case 'l':
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if (*f == 'l')
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{
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/* A double `l' is equivalent to an `L'. */
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++f;
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flags |= LONGDBL;
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}
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else
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/* ints are long ints. */
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flags |= LONG;
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break;
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case 'q':
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case 'L':
|
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/* doubles are long doubles, and ints are long long ints. */
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flags |= LONGDBL;
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break;
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case 'a':
|
|
/* The `a' is used as a flag only if followed by `s', `S' or
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`['. */
|
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if (*f != 's' && *f != 'S' && *f != '[')
|
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{
|
|
--f;
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break;
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}
|
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/* String conversions (%s, %[) take a `char **'
|
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arg and fill it in with a malloc'd pointer. */
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flags |= MALLOC;
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break;
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case 'z':
|
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if (sizeof (size_t) > sizeof (unsigned long int))
|
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flags |= LONGDBL;
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else if (sizeof (size_t) > sizeof (unsigned int))
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flags |= LONG;
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break;
|
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case 'j':
|
|
if (sizeof (uintmax_t) > sizeof (unsigned long int))
|
|
flags |= LONGDBL;
|
|
else if (sizeof (uintmax_t) > sizeof (unsigned int))
|
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flags |= LONG;
|
|
break;
|
|
case 't':
|
|
if (sizeof (ptrdiff_t) > sizeof (long int))
|
|
flags |= LONGDBL;
|
|
else if (sizeof (ptrdiff_t) > sizeof (int))
|
|
flags |= LONG;
|
|
break;
|
|
default:
|
|
/* Not a recognized modifier. Backup. */
|
|
--f;
|
|
break;
|
|
}
|
|
|
|
/* End of the format string? */
|
|
if (*f == '\0')
|
|
conv_error ();
|
|
|
|
/* Find the conversion specifier. */
|
|
fc = *f++;
|
|
if (skip_space || (fc != '[' && fc != 'c' && fc != 'C' && fc != 'n'))
|
|
{
|
|
/* Eat whitespace. */
|
|
int save_errno = errno;
|
|
errno = 0;
|
|
do
|
|
if (inchar () == EOF && errno == EINTR)
|
|
input_error ();
|
|
while (isspace (c));
|
|
errno = save_errno;
|
|
ungetc (c, s);
|
|
skip_space = 0;
|
|
}
|
|
|
|
switch (fc)
|
|
{
|
|
case '%': /* Must match a literal '%'. */
|
|
c = inchar ();
|
|
if (c == EOF)
|
|
input_error ();
|
|
if (c != fc)
|
|
{
|
|
ungetc (c, s);
|
|
conv_error ();
|
|
}
|
|
break;
|
|
|
|
case 'n': /* Answer number of assignments done. */
|
|
/* Corrigendum 1 to ISO C 1990 describes the allowed flags
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|
with the 'n' conversion specifier. */
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
/* Don't count the read-ahead. */
|
|
if (flags & LONGDBL)
|
|
*ARG (long long int *) = read_in;
|
|
else if (flags & LONG)
|
|
*ARG (long int *) = read_in;
|
|
else if (flags & SHORT)
|
|
*ARG (short int *) = read_in;
|
|
else
|
|
*ARG (int *) = read_in;
|
|
|
|
#ifdef NO_BUG_IN_ISO_C_CORRIGENDUM_1
|
|
/* We have a severe problem here. The ISO C standard
|
|
contradicts itself in explaining the effect of the %n
|
|
format in `scanf'. While in ISO C:1990 and the ISO C
|
|
Amendement 1:1995 the result is described as
|
|
|
|
Execution of a %n directive does not effect the
|
|
assignment count returned at the completion of
|
|
execution of the f(w)scanf function.
|
|
|
|
in ISO C Corrigendum 1:1994 the following was added:
|
|
|
|
Subclause 7.9.6.2
|
|
Add the following fourth example:
|
|
In:
|
|
#include <stdio.h>
|
|
int d1, d2, n1, n2, i;
|
|
i = sscanf("123", "%d%n%n%d", &d1, &n1, &n2, &d2);
|
|
the value 123 is assigned to d1 and the value3 to n1.
|
|
Because %n can never get an input failure the value
|
|
of 3 is also assigned to n2. The value of d2 is not
|
|
affected. The value 3 is assigned to i.
|
|
|
|
We go for now with the historically correct code from ISO C,
|
|
i.e., we don't count the %n assignments. When it ever
|
|
should proof to be wrong just remove the #ifdef above. */
|
|
++done;
|
|
#endif
|
|
}
|
|
break;
|
|
|
|
case 'c': /* Match characters. */
|
|
if ((flags & LONG) == 0)
|
|
{
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
str = ARG (char *);
|
|
if (str == NULL)
|
|
conv_error ();
|
|
}
|
|
|
|
c = inchar ();
|
|
if (c == EOF)
|
|
input_error ();
|
|
|
|
if (width == -1)
|
|
width = 1;
|
|
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
do
|
|
*str++ = c;
|
|
while (--width > 0 && inchar () != EOF);
|
|
}
|
|
else
|
|
while (--width > 0 && inchar () != EOF);
|
|
|
|
if (!(flags & SUPPRESS))
|
|
++done;
|
|
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
case 'C':
|
|
/* Get UTF-8 encoded wide character. Here we assume (as in
|
|
other parts of the libc) that we only have to handle
|
|
UTF-8. */
|
|
{
|
|
wint_t val;
|
|
size_t cnt = 0;
|
|
int first = 1;
|
|
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
wstr = ARG (wchar_t *);
|
|
if (str == NULL)
|
|
conv_error ();
|
|
}
|
|
|
|
do
|
|
{
|
|
#define NEXT_WIDE_CHAR(First) \
|
|
c = inchar (); \
|
|
if (c == EOF) \
|
|
{ \
|
|
/* EOF is only an error for the first character. */ \
|
|
if (First) \
|
|
input_error (); \
|
|
else \
|
|
break; \
|
|
} \
|
|
val = c; \
|
|
if (val >= 0x80) \
|
|
{ \
|
|
if ((c & 0xc0) == 0x80 || (c & 0xfe) == 0xfe) \
|
|
encode_error (); \
|
|
if ((c & 0xe0) == 0xc0) \
|
|
{ \
|
|
/* We expect two bytes. */ \
|
|
cnt = 1; \
|
|
val &= 0x1f; \
|
|
} \
|
|
else if ((c & 0xf0) == 0xe0) \
|
|
{ \
|
|
/* We expect three bytes. */ \
|
|
cnt = 2; \
|
|
val &= 0x0f; \
|
|
} \
|
|
else if ((c & 0xf8) == 0xf0) \
|
|
{ \
|
|
/* We expect four bytes. */ \
|
|
cnt = 3; \
|
|
val &= 0x07; \
|
|
} \
|
|
else if ((c & 0xfc) == 0xf8) \
|
|
{ \
|
|
/* We expect five bytes. */ \
|
|
cnt = 4; \
|
|
val &= 0x03; \
|
|
} \
|
|
else \
|
|
{ \
|
|
/* We expect six bytes. */ \
|
|
cnt = 5; \
|
|
val &= 0x01; \
|
|
} \
|
|
\
|
|
do \
|
|
{ \
|
|
c = inchar (); \
|
|
if (c == EOF \
|
|
|| (c & 0xc0) == 0x80 || (c & 0xfe) == 0xfe) \
|
|
encode_error (); \
|
|
val <<= 6; \
|
|
val |= c & 0x3f; \
|
|
} \
|
|
while (--cnt > 0); \
|
|
} \
|
|
\
|
|
if (!(flags & SUPPRESS)) \
|
|
*wstr++ = val; \
|
|
First = 0
|
|
|
|
NEXT_WIDE_CHAR (first);
|
|
}
|
|
while (--width > 0);
|
|
|
|
if (!(flags & SUPPRESS))
|
|
++done;
|
|
}
|
|
break;
|
|
|
|
case 's': /* Read a string. */
|
|
if (flags & LONG)
|
|
/* We have to process a wide character string. */
|
|
goto wide_char_string;
|
|
|
|
#define STRING_ARG(Str, Type) \
|
|
if (!(flags & SUPPRESS)) \
|
|
{ \
|
|
if (flags & MALLOC) \
|
|
{ \
|
|
/* The string is to be stored in a malloc'd buffer. */ \
|
|
strptr = ARG (char **); \
|
|
if (strptr == NULL) \
|
|
conv_error (); \
|
|
/* Allocate an initial buffer. */ \
|
|
strsize = 100; \
|
|
*strptr = malloc (strsize * sizeof (Type)); \
|
|
Str = (Type *) *strptr; \
|
|
} \
|
|
else \
|
|
Str = ARG (Type *); \
|
|
if (Str == NULL) \
|
|
conv_error (); \
|
|
}
|
|
STRING_ARG (str, char);
|
|
|
|
c = inchar ();
|
|
if (c == EOF)
|
|
input_error ();
|
|
|
|
do
|
|
{
|
|
if (isspace (c))
|
|
{
|
|
ungetc (c, s);
|
|
break;
|
|
}
|
|
#define STRING_ADD_CHAR(Str, c, Type) \
|
|
if (!(flags & SUPPRESS)) \
|
|
{ \
|
|
*Str++ = c; \
|
|
if ((flags & MALLOC) && (char *) Str == *strptr + strsize) \
|
|
{ \
|
|
/* Enlarge the buffer. */ \
|
|
Str = realloc (*strptr, strsize * 2 * sizeof (Type)); \
|
|
if (Str == NULL) \
|
|
{ \
|
|
/* Can't allocate that much. Last-ditch effort. */\
|
|
Str = realloc (*strptr, \
|
|
(strsize + 1) * sizeof (Type)); \
|
|
if (Str == NULL) \
|
|
{ \
|
|
/* We lose. Oh well. \
|
|
Terminate the string and stop converting, \
|
|
so at least we don't skip any input. */ \
|
|
((Type *) (*strptr))[strsize] = '\0'; \
|
|
++done; \
|
|
conv_error (); \
|
|
} \
|
|
else \
|
|
{ \
|
|
*strptr = (char *) Str; \
|
|
Str = ((Type *) *strptr) + strsize; \
|
|
++strsize; \
|
|
} \
|
|
} \
|
|
else \
|
|
{ \
|
|
*strptr = (char *) Str; \
|
|
Str = ((Type *) *strptr) + strsize; \
|
|
strsize *= 2; \
|
|
} \
|
|
} \
|
|
}
|
|
STRING_ADD_CHAR (str, c, char);
|
|
} while ((width <= 0 || --width > 0) && inchar () != EOF);
|
|
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
*str = '\0';
|
|
++done;
|
|
}
|
|
break;
|
|
|
|
case 'S':
|
|
/* Wide character string. */
|
|
wide_char_string:
|
|
{
|
|
wint_t val;
|
|
int first = 1;
|
|
STRING_ARG (wstr, wchar_t);
|
|
|
|
do
|
|
{
|
|
size_t cnt = 0;
|
|
NEXT_WIDE_CHAR (first);
|
|
|
|
if (iswspace (val))
|
|
{
|
|
/* XXX We would have to push back the whole wide char
|
|
with possibly many bytes. But since scanf does
|
|
not make a difference for white space characters
|
|
we can simply push back a simple <SP> which is
|
|
guaranteed to be in the [:space:] class. */
|
|
ungetc (' ', s);
|
|
break;
|
|
}
|
|
|
|
STRING_ADD_CHAR (wstr, val, wchar_t);
|
|
first = 0;
|
|
}
|
|
while (width <= 0 || --width > 0);
|
|
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
*wstr = L'\0';
|
|
++done;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 'x': /* Hexadecimal integer. */
|
|
case 'X': /* Ditto. */
|
|
base = 16;
|
|
number_signed = 0;
|
|
goto number;
|
|
|
|
case 'o': /* Octal integer. */
|
|
base = 8;
|
|
number_signed = 0;
|
|
goto number;
|
|
|
|
case 'u': /* Unsigned decimal integer. */
|
|
base = 10;
|
|
number_signed = 0;
|
|
goto number;
|
|
|
|
case 'd': /* Signed decimal integer. */
|
|
base = 10;
|
|
number_signed = 1;
|
|
goto number;
|
|
|
|
case 'i': /* Generic number. */
|
|
base = 0;
|
|
number_signed = 1;
|
|
|
|
number:
|
|
c = inchar ();
|
|
if (c == EOF)
|
|
input_error ();
|
|
|
|
/* Check for a sign. */
|
|
if (c == '-' || c == '+')
|
|
{
|
|
ADDW (c);
|
|
if (width > 0)
|
|
--width;
|
|
c = inchar ();
|
|
}
|
|
|
|
/* Look for a leading indication of base. */
|
|
if (width != 0 && c == '0')
|
|
{
|
|
if (width > 0)
|
|
--width;
|
|
|
|
ADDW (c);
|
|
c = inchar ();
|
|
|
|
if (width != 0 && tolower (c) == 'x')
|
|
{
|
|
if (base == 0)
|
|
base = 16;
|
|
if (base == 16)
|
|
{
|
|
if (width > 0)
|
|
--width;
|
|
c = inchar ();
|
|
}
|
|
}
|
|
else if (base == 0)
|
|
base = 8;
|
|
}
|
|
|
|
if (base == 0)
|
|
base = 10;
|
|
|
|
/* Read the number into workspace. */
|
|
while (c != EOF && width != 0)
|
|
{
|
|
if (base == 16 ? !isxdigit (c) :
|
|
((!isdigit (c) || c - '0' >= base) &&
|
|
!((flags & GROUP) && base == 10 && c == thousands)))
|
|
break;
|
|
ADDW (c);
|
|
if (width > 0)
|
|
--width;
|
|
|
|
c = inchar ();
|
|
}
|
|
|
|
if (wpsize == 0 ||
|
|
(wpsize == 1 && (wp[0] == '+' || wp[0] == '-')))
|
|
{
|
|
/* There was no number. If we are supposed to read a pointer
|
|
we must recognize "(nil)" as well. */
|
|
if (wpsize == 0 && read_pointer && (width < 0 || width >= 0)
|
|
&& c == '('
|
|
&& tolower (inchar ()) == 'n'
|
|
&& tolower (inchar ()) == 'i'
|
|
&& tolower (inchar ()) == 'l'
|
|
&& inchar () == ')')
|
|
/* We must produce the value of a NULL pointer. A single
|
|
'0' digit is enough. */
|
|
ADDW ('0');
|
|
else
|
|
{
|
|
/* The last read character is not part of the number
|
|
anymore. */
|
|
ungetc (c, s);
|
|
|
|
conv_error ();
|
|
}
|
|
}
|
|
else
|
|
/* The just read character is not part of the number anymore. */
|
|
ungetc (c, s);
|
|
|
|
/* Convert the number. */
|
|
ADDW ('\0');
|
|
if (flags & LONGDBL)
|
|
{
|
|
if (number_signed)
|
|
num.q = __strtoll_internal (wp, &tw, base, flags & GROUP);
|
|
else
|
|
num.uq = __strtoull_internal (wp, &tw, base, flags & GROUP);
|
|
}
|
|
else
|
|
{
|
|
if (number_signed)
|
|
num.l = __strtol_internal (wp, &tw, base, flags & GROUP);
|
|
else
|
|
num.ul = __strtoul_internal (wp, &tw, base, flags & GROUP);
|
|
}
|
|
if (wp == tw)
|
|
conv_error ();
|
|
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
if (! number_signed)
|
|
{
|
|
if (flags & LONGDBL)
|
|
*ARG (unsigned LONGLONG int *) = num.uq;
|
|
else if (flags & LONG)
|
|
*ARG (unsigned long int *) = num.ul;
|
|
else if (flags & SHORT)
|
|
*ARG (unsigned short int *)
|
|
= (unsigned short int) num.ul;
|
|
else if (flags & CHAR)
|
|
*ARG (unsigned char *) = (unsigned char) num.ul;
|
|
else
|
|
*ARG (unsigned int *) = (unsigned int) num.ul;
|
|
}
|
|
else
|
|
{
|
|
if (flags & LONGDBL)
|
|
*ARG (LONGLONG int *) = num.q;
|
|
else if (flags & LONG)
|
|
*ARG (long int *) = num.l;
|
|
else if (flags & SHORT)
|
|
*ARG (short int *) = (short int) num.l;
|
|
else if (flags & CHAR)
|
|
*ARG (signed char *) = (signed char) num.ul;
|
|
else
|
|
*ARG (int *) = (int) num.l;
|
|
}
|
|
++done;
|
|
}
|
|
break;
|
|
|
|
case 'e': /* Floating-point numbers. */
|
|
case 'E':
|
|
case 'f':
|
|
case 'g':
|
|
case 'G':
|
|
case 'a':
|
|
case 'A':
|
|
c = inchar ();
|
|
if (c == EOF)
|
|
input_error ();
|
|
|
|
/* Check for a sign. */
|
|
if (c == '-' || c == '+')
|
|
{
|
|
negative = c == '-';
|
|
if (inchar () == EOF)
|
|
/* EOF is only an input error before we read any chars. */
|
|
conv_error ();
|
|
if (width > 0)
|
|
--width;
|
|
}
|
|
else
|
|
negative = 0;
|
|
|
|
/* Take care for the special arguments "nan" and "inf". */
|
|
if (tolower (c) == 'n')
|
|
{
|
|
/* Maybe "nan". */
|
|
ADDW (c);
|
|
if (inchar () == EOF || tolower (c) != 'a')
|
|
input_error ();
|
|
ADDW (c);
|
|
if (inchar () == EOF || tolower (c) != 'n')
|
|
input_error ();
|
|
ADDW (c);
|
|
/* It is "nan". */
|
|
goto scan_float;
|
|
}
|
|
else if (tolower (c) == 'i')
|
|
{
|
|
/* Maybe "inf" or "infinity". */
|
|
ADDW (c);
|
|
if (inchar () == EOF || tolower (c) != 'n')
|
|
input_error ();
|
|
ADDW (c);
|
|
if (inchar () == EOF || tolower (c) != 'f')
|
|
input_error ();
|
|
ADDW (c);
|
|
/* It is as least "inf". */
|
|
if (inchar () != EOF)
|
|
{
|
|
if (tolower (c) == 'i')
|
|
{
|
|
/* No we have to read the rest as well. */
|
|
ADDW (c);
|
|
if (inchar () == EOF || tolower (c) != 'n')
|
|
input_error ();
|
|
ADDW (c);
|
|
if (inchar () == EOF || tolower (c) != 'i')
|
|
input_error ();
|
|
ADDW (c);
|
|
if (inchar () == EOF || tolower (c) != 't')
|
|
input_error ();
|
|
ADDW (c);
|
|
if (inchar () == EOF || tolower (c) != 'y')
|
|
input_error ();
|
|
ADDW (c);
|
|
}
|
|
else
|
|
/* Never mind. */
|
|
ungetc (c, s);
|
|
}
|
|
goto scan_float;
|
|
}
|
|
|
|
is_hexa = 0;
|
|
exp_char = 'e';
|
|
if (c == '0')
|
|
{
|
|
ADDW (c);
|
|
c = inchar ();
|
|
if (tolower (c) == 'x')
|
|
{
|
|
/* It is a number in hexadecimal format. */
|
|
ADDW (c);
|
|
|
|
is_hexa = 1;
|
|
exp_char = 'p';
|
|
|
|
/* Grouping is not allowed. */
|
|
flags &= ~GROUP;
|
|
c = inchar ();
|
|
}
|
|
}
|
|
|
|
got_dot = got_e = 0;
|
|
do
|
|
{
|
|
if (isdigit (c))
|
|
ADDW (c);
|
|
else if (!got_e && is_hexa && isxdigit (c))
|
|
ADDW (c);
|
|
else if (got_e && wp[wpsize - 1] == exp_char
|
|
&& (c == '-' || c == '+'))
|
|
ADDW (c);
|
|
else if (wpsize > 0 && !got_e && tolower (c) == exp_char)
|
|
{
|
|
ADDW (exp_char);
|
|
got_e = got_dot = 1;
|
|
}
|
|
else if (c == decimal && !got_dot)
|
|
{
|
|
ADDW (c);
|
|
got_dot = 1;
|
|
}
|
|
else if ((flags & GROUP) && c == thousands && !got_dot)
|
|
ADDW (c);
|
|
else
|
|
{
|
|
/* The last read character is not part of the number
|
|
anymore. */
|
|
ungetc (c, s);
|
|
break;
|
|
}
|
|
if (width > 0)
|
|
--width;
|
|
}
|
|
while (width != 0 && inchar () != EOF);
|
|
|
|
/* Have we read any character? If we try to read a number
|
|
in hexadecimal notation and we have read only the `0x'
|
|
prefix this is an error. */
|
|
if (wpsize == 0 || (is_hexa && wpsize == 2))
|
|
conv_error ();
|
|
|
|
scan_float:
|
|
/* Convert the number. */
|
|
ADDW ('\0');
|
|
if (flags & LONGDBL)
|
|
{
|
|
long double d = __strtold_internal (wp, &tw, flags & GROUP);
|
|
if (!(flags & SUPPRESS) && tw != wp)
|
|
*ARG (long double *) = negative ? -d : d;
|
|
}
|
|
else if (flags & LONG)
|
|
{
|
|
double d = __strtod_internal (wp, &tw, flags & GROUP);
|
|
if (!(flags & SUPPRESS) && tw != wp)
|
|
*ARG (double *) = negative ? -d : d;
|
|
}
|
|
else
|
|
{
|
|
float d = __strtof_internal (wp, &tw, flags & GROUP);
|
|
if (!(flags & SUPPRESS) && tw != wp)
|
|
*ARG (float *) = negative ? -d : d;
|
|
}
|
|
|
|
if (tw == wp)
|
|
conv_error ();
|
|
|
|
if (!(flags & SUPPRESS))
|
|
++done;
|
|
break;
|
|
|
|
case '[': /* Character class. */
|
|
if (flags & LONG)
|
|
{
|
|
STRING_ARG (wstr, wchar_t);
|
|
c = '\0'; /* This is to keep gcc quiet. */
|
|
}
|
|
else
|
|
{
|
|
STRING_ARG (str, char);
|
|
|
|
c = inchar ();
|
|
if (c == EOF)
|
|
input_error ();
|
|
}
|
|
|
|
if (*f == '^')
|
|
{
|
|
++f;
|
|
not_in = 1;
|
|
}
|
|
else
|
|
not_in = 0;
|
|
|
|
/* Fill WP with byte flags indexed by character.
|
|
We will use this flag map for matching input characters. */
|
|
if (wpmax < UCHAR_MAX)
|
|
{
|
|
wpmax = UCHAR_MAX;
|
|
wp = (char *) alloca (wpmax);
|
|
}
|
|
memset (wp, 0, UCHAR_MAX);
|
|
|
|
fc = *f;
|
|
if (fc == ']' || fc == '-')
|
|
{
|
|
/* If ] or - appears before any char in the set, it is not
|
|
the terminator or separator, but the first char in the
|
|
set. */
|
|
wp[fc] = 1;
|
|
++f;
|
|
}
|
|
|
|
while ((fc = *f++) != '\0' && fc != ']')
|
|
{
|
|
if (fc == '-' && *f != '\0' && *f != ']' &&
|
|
(unsigned char) f[-2] <= (unsigned char) *f)
|
|
{
|
|
/* Add all characters from the one before the '-'
|
|
up to (but not including) the next format char. */
|
|
for (fc = f[-2]; fc < *f; ++fc)
|
|
wp[fc] = 1;
|
|
}
|
|
else
|
|
/* Add the character to the flag map. */
|
|
wp[fc] = 1;
|
|
}
|
|
if (fc == '\0')
|
|
{
|
|
if (!(flags & LONG))
|
|
ungetc (c, s);
|
|
conv_error();
|
|
}
|
|
|
|
if (flags & LONG)
|
|
{
|
|
wint_t val;
|
|
int first = 1;
|
|
|
|
do
|
|
{
|
|
size_t cnt = 0;
|
|
NEXT_WIDE_CHAR (first);
|
|
if (val <= 255 && wp[val] == not_in)
|
|
{
|
|
ungetc (val, s);
|
|
break;
|
|
}
|
|
STRING_ADD_CHAR (wstr, val, wchar_t);
|
|
if (width > 0)
|
|
--width;
|
|
first = 0;
|
|
}
|
|
while (width != 0);
|
|
|
|
if (first)
|
|
conv_error ();
|
|
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
*wstr = L'\0';
|
|
++done;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
num.ul = read_in - 1; /* -1 because we already read one char. */
|
|
do
|
|
{
|
|
if (wp[c] == not_in)
|
|
{
|
|
ungetc (c, s);
|
|
break;
|
|
}
|
|
STRING_ADD_CHAR (str, c, char);
|
|
if (width > 0)
|
|
--width;
|
|
}
|
|
while (width != 0 && inchar () != EOF);
|
|
|
|
if (read_in == num.ul)
|
|
conv_error ();
|
|
|
|
if (!(flags & SUPPRESS))
|
|
{
|
|
*str = '\0';
|
|
++done;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 'p': /* Generic pointer. */
|
|
base = 16;
|
|
/* A PTR must be the same size as a `long int'. */
|
|
flags &= ~(SHORT|LONGDBL);
|
|
flags |= LONG;
|
|
number_signed = 0;
|
|
read_pointer = 1;
|
|
goto number;
|
|
}
|
|
}
|
|
|
|
/* The last thing we saw int the format string was a white space.
|
|
Consume the last white spaces. */
|
|
if (skip_space)
|
|
{
|
|
do
|
|
c = inchar ();
|
|
while (isspace (c));
|
|
ungetc (c, s);
|
|
}
|
|
|
|
/* Unlock stream. */
|
|
UNLOCK_STREAM (s);
|
|
|
|
return done;
|
|
}
|
|
|
|
#ifdef USE_IN_LIBIO
|
|
int
|
|
__vfscanf (FILE *s, const char *format, va_list argptr)
|
|
{
|
|
return _IO_vfscanf (s, format, argptr, NULL);
|
|
}
|
|
#endif
|
|
|
|
weak_alias (__vfscanf, vfscanf)
|