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da50f00107
glibc/stdio-common/vfscanf.c
Ulrich Drepper da50f00107 .. 
More simplifications of floating-point reader.
2007-02-18 09:43:44 +00:00

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/* Copyright (C) 1991-2002, 2003, 2004, 2005, 2006, 2007
Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>
#include <bits/libc-lock.h>
#include <locale/localeinfo.h>
#ifdef __GNUC__
# define HAVE_LONGLONG
# define LONGLONG long long
#else
# define LONGLONG long
#endif
/* Determine whether we have to handle `long long' at all. */
#if LONG_MAX == LONG_LONG_MAX
# define need_longlong 0
#else
# define need_longlong 1
#endif
/* Determine whether we have to handle `long'. */
#if INT_MAX == LONG_MAX
# define need_long 0
#else
# define need_long 1
#endif
/* Those are flags in the conversion format. */
#define LONG 0x001 /* l: long or double */
#define LONGDBL 0x002 /* L: long long or long double */
#define SHORT 0x004 /* h: short */
#define SUPPRESS 0x008 /* *: suppress assignment */
#define POINTER 0x010 /* weird %p pointer (`fake hex') */
#define NOSKIP 0x020 /* do not skip blanks */
#define GROUP 0x080 /* ': group numbers */
#define MALLOC 0x100 /* a: malloc strings */
#define CHAR 0x200 /* hh: char */
#define I18N 0x400 /* I: use locale's digits */
#include <locale/localeinfo.h>
#include <libioP.h>
#include <libio.h>
#undef va_list
#define va_list _IO_va_list
#ifdef COMPILE_WSCANF
# define ungetc(c, s) ((void) (c == WEOF \
|| (--read_in, \
INTUSE(_IO_sputbackwc) (s, c))))
# define ungetc_not_eof(c, s) ((void) (--read_in, \
INTUSE(_IO_sputbackwc) (s, c)))
# define inchar() (c == WEOF ? ((errno = inchar_errno), WEOF) \
: ((c = _IO_getwc_unlocked (s)), \
(void) (c != WEOF \
? ++read_in \
: (size_t) (inchar_errno = errno)), c))
# define MEMCPY(d, s, n) __wmemcpy (d, s, n)
# define ISSPACE(Ch) iswspace (Ch)
# define ISDIGIT(Ch) iswdigit (Ch)
# define ISXDIGIT(Ch) iswxdigit (Ch)
# define TOLOWER(Ch) towlower (Ch)
# define ORIENT if (_IO_fwide (s, 1) != 1) return WEOF
# define __strtoll_internal __wcstoll_internal
# define __strtoull_internal __wcstoull_internal
# define __strtol_internal __wcstol_internal
# define __strtoul_internal __wcstoul_internal
# define __strtold_internal __wcstold_internal
# define __strtod_internal __wcstod_internal
# define __strtof_internal __wcstof_internal
# define L_(Str) L##Str
# define CHAR_T wchar_t
# define UCHAR_T unsigned int
# define WINT_T wint_t
# undef EOF
# define EOF WEOF
#else
# define ungetc(c, s) ((void) ((int) c == EOF \
|| (--read_in, \
INTUSE(_IO_sputbackc) (s, (unsigned char) c))))
# define ungetc_not_eof(c, s) ((void) (--read_in, \
INTUSE(_IO_sputbackc) (s, (unsigned char) c)))
# define inchar() (c == EOF ? ((errno = inchar_errno), EOF) \
: ((c = _IO_getc_unlocked (s)), \
(void) (c != EOF \
? ++read_in \
: (size_t) (inchar_errno = errno)), c))
# define MEMCPY(d, s, n) memcpy (d, s, n)
# define ISSPACE(Ch) __isspace_l (Ch, loc)
# define ISDIGIT(Ch) __isdigit_l (Ch, loc)
# define ISXDIGIT(Ch) __isxdigit_l (Ch, loc)
# define TOLOWER(Ch) __tolower_l ((unsigned char) (Ch), loc)
# define ORIENT if (_IO_vtable_offset (s) == 0 \
&& _IO_fwide (s, -1) != -1) \
return EOF
# define L_(Str) Str
# define CHAR_T char
# define UCHAR_T unsigned char
# define WINT_T int
#endif
#define encode_error() do { \
errval = 4; \
__set_errno (EILSEQ); \
goto errout; \
} while (0)
#define conv_error() do { \
errval = 2; \
goto errout; \
} while (0)
#define input_error() do { \
errval = 1; \
if (done == 0) done = EOF; \
goto errout; \
} while (0)
#define ARGCHECK(s, format) \
do \
{ \
/* Check file argument for consistence. */ \
CHECK_FILE (s, EOF); \
if (s->_flags & _IO_NO_READS) \
{ \
__set_errno (EBADF); \
return EOF; \
} \
else if (format == NULL) \
{ \
MAYBE_SET_EINVAL; \
return EOF; \
} \
} while (0)
#define LOCK_STREAM(S) \
__libc_cleanup_region_start (1, (void (*) (void *)) &_IO_funlockfile, (S)); \
_IO_flockfile (S)
#define UNLOCK_STREAM(S) \
_IO_funlockfile (S); \
__libc_cleanup_region_end (0)
/* Read formatted input from S according to the format string
FORMAT, using the argument list in ARG.
Return the number of assignments made, or -1 for an input error. */
#ifdef COMPILE_WSCANF
int
_IO_vfwscanf (_IO_FILE *s, const wchar_t *format, _IO_va_list argptr,
int *errp)
#else
int
_IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
int *errp)
#endif
{
va_list arg;
register const CHAR_T *f = format;
register UCHAR_T fc; /* Current character of the format. */
register WINT_T done = 0; /* Assignments done. */
register size_t read_in = 0; /* Chars read in. */
register WINT_T c = 0; /* Last char read. */
register int width; /* Maximum field width. */
register int flags; /* Modifiers for current format element. */
int errval = 0;
#ifndef COMPILE_WSCANF
__locale_t loc = _NL_CURRENT_LOCALE;
struct locale_data *const curctype = loc->__locales[LC_CTYPE];
#endif
/* Errno of last failed inchar call. */
int inchar_errno = 0;
/* Status for reading F-P nums. */
char got_dot, got_e, negative;
/* If a [...] is a [^...]. */
CHAR_T not_in;
#define exp_char not_in
/* Base for integral numbers. */
int base;
/* Signedness for integral numbers. */
int number_signed;
#define is_hexa number_signed
/* Decimal point character. */
#ifdef COMPILE_WSCANF
wint_t decimal;
#else
const char *decimal;
#endif
/* The thousands character of the current locale. */
#ifdef COMPILE_WSCANF
wint_t thousands;
#else
const char *thousands;
#endif
/* State for the conversions. */
mbstate_t state;
/* Integral holding variables. */
union
{
long long int q;
unsigned long long int uq;
long int l;
unsigned long int ul;
} num;
/* Character-buffer pointer. */
char *str = NULL;
wchar_t *wstr = NULL;
char **strptr = NULL;
ssize_t strsize = 0;
/* We must not react on white spaces immediately because they can
possibly be matched even if in the input stream no character is
available anymore. */
int skip_space = 0;
/* Nonzero if we are reading a pointer. */
int read_pointer;
/* Workspace. */
CHAR_T *tw; /* Temporary pointer. */
CHAR_T *wp = NULL; /* Workspace. */
size_t wpmax = 0; /* Maximal size of workspace. */
size_t wpsize; /* Currently used bytes in workspace. */
#define ADDW(Ch) \
do \
{ \
if (wpsize == wpmax) \
{ \
CHAR_T *old = wp; \
wpmax = (UCHAR_MAX + 1 > 2 * wpmax ? UCHAR_MAX + 1 : 2 * wpmax); \
wp = (CHAR_T *) alloca (wpmax * sizeof (wchar_t)); \
if (old != NULL) \
MEMCPY (wp, old, wpsize); \
} \
wp[wpsize++] = (Ch); \
} \
while (0)
#ifdef __va_copy
__va_copy (arg, argptr);
#else
arg = (va_list) argptr;
#endif
#ifdef ORIENT
ORIENT;
#endif
ARGCHECK (s, format);
{
#ifndef COMPILE_WSCANF
struct locale_data *const curnumeric = loc->__locales[LC_NUMERIC];
#endif
/* Figure out the decimal point character. */
#ifdef COMPILE_WSCANF
decimal = _NL_CURRENT_WORD (LC_NUMERIC, _NL_NUMERIC_DECIMAL_POINT_WC);
#else
decimal = curnumeric->values[_NL_ITEM_INDEX (DECIMAL_POINT)].string;
#endif
/* Figure out the thousands separator character. */
#ifdef COMPILE_WSCANF
thousands = _NL_CURRENT_WORD (LC_NUMERIC, _NL_NUMERIC_THOUSANDS_SEP_WC);
#else
thousands = curnumeric->values[_NL_ITEM_INDEX (THOUSANDS_SEP)].string;
if (*thousands == '\0')
thousands = NULL;
#endif
}
/* Lock the stream. */
LOCK_STREAM (s);
#ifndef COMPILE_WSCANF
/* From now on we use `state' to convert the format string. */
memset (&state, '\0', sizeof (state));
#endif
/* Run through the format string. */
while (*f != '\0')
{
unsigned int argpos;
/* Extract the next argument, which is of type TYPE.
For a %N$... spec, this is the Nth argument from the beginning;
otherwise it is the next argument after the state now in ARG. */
#ifdef __va_copy
# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
({ unsigned int pos = argpos; \
va_list arg; \
__va_copy (arg, argptr); \
while (--pos > 0) \
(void) va_arg (arg, void *); \
va_arg (arg, type); \
}))
#else
# if 0
/* XXX Possible optimization. */
# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
({ va_list arg = (va_list) argptr; \
arg = (va_list) ((char *) arg \
+ (argpos - 1) \
* __va_rounded_size (void *)); \
va_arg (arg, type); \
}))
# else
# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
({ unsigned int pos = argpos; \
va_list arg = (va_list) argptr; \
while (--pos > 0) \
(void) va_arg (arg, void *); \
va_arg (arg, type); \
}))
# endif
#endif
#ifndef COMPILE_WSCANF
if (!isascii ((unsigned char) *f))
{
/* Non-ASCII, may be a multibyte. */
int len = __mbrlen (f, strlen (f), &state);
if (len > 0)
{
do
{
c = inchar ();
if (__builtin_expect (c == EOF, 0))
input_error ();
else if (c != (unsigned char) *f++)
{
ungetc_not_eof (c, s);
conv_error ();
}
}
while (--len > 0);
continue;
}
}
#endif
fc = *f++;
if (fc != '%')
{
/* Remember to skip spaces. */
if (ISSPACE (fc))
{
skip_space = 1;
continue;
}
/* Read a character. */
c = inchar ();
/* Characters other than format specs must just match. */
if (__builtin_expect (c == EOF, 0))
input_error ();
/* We saw white space char as the last character in the format
string. Now it's time to skip all leading white space. */
if (skip_space)
{
while (ISSPACE (c))
if (__builtin_expect (inchar () == EOF, 0))
input_error ();
skip_space = 0;
}
if (__builtin_expect (c != fc, 0))
{
ungetc (c, s);
conv_error ();
}
continue;
}
/* This is the start of the conversion string. */
flags = 0;
/* Not yet decided whether we read a pointer or not. */
read_pointer = 0;
/* Initialize state of modifiers. */
argpos = 0;
/* Prepare temporary buffer. */
wpsize = 0;
/* Check for a positional parameter specification. */
if (ISDIGIT ((UCHAR_T) *f))
{
argpos = (UCHAR_T) *f++ - L_('0');
while (ISDIGIT ((UCHAR_T) *f))
argpos = argpos * 10 + ((UCHAR_T) *f++ - L_('0'));
if (*f == L_('$'))
++f;
else
{
/* Oops; that was actually the field width. */
width = argpos;
argpos = 0;
goto got_width;
}
}
/* Check for the assignment-suppressing, the number grouping flag,
and the signal to use the locale's digit representation. */
while (*f == L_('*') || *f == L_('\'') || *f == L_('I'))
switch (*f++)
{
case L_('*'):
flags |= SUPPRESS;
break;
case L_('\''):
flags |= GROUP;
break;
case L_('I'):
flags |= I18N;
break;
}
/* Find the maximum field width. */
width = 0;
while (ISDIGIT ((UCHAR_T) *f))
{
width *= 10;
width += (UCHAR_T) *f++ - L_('0');
}
got_width:
if (width == 0)
width = -1;
/* Check for type modifiers. */
switch (*f++)
{
case L_('h'):
/* ints are short ints or chars. */
if (*f == L_('h'))
{
++f;
flags |= CHAR;
}
else
flags |= SHORT;
break;
case L_('l'):
if (*f == L_('l'))
{
/* A double `l' is equivalent to an `L'. */
++f;
flags |= LONGDBL | LONG;
}
else
/* ints are long ints. */
flags |= LONG;
break;
case L_('q'):
case L_('L'):
/* doubles are long doubles, and ints are long long ints. */
flags |= LONGDBL | LONG;
break;
case L_('a'):
/* The `a' is used as a flag only if followed by `s', `S' or
`['. */
if (*f != L_('s') && *f != L_('S') && *f != L_('['))
{
--f;
break;
}
/* String conversions (%s, %[) take a `char **'
arg and fill it in with a malloc'd pointer. */
flags |= MALLOC;
break;
case L_('z'):
if (need_longlong && sizeof (size_t) > sizeof (unsigned long int))
flags |= LONGDBL;
else if (sizeof (size_t) > sizeof (unsigned int))
flags |= LONG;
break;
case L_('j'):
if (need_longlong && sizeof (uintmax_t) > sizeof (unsigned long int))
flags |= LONGDBL;
else if (sizeof (uintmax_t) > sizeof (unsigned int))
flags |= LONG;
break;
case L_('t'):
if (need_longlong && 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 (__builtin_expect (*f == L_('\0'), 0))
conv_error ();
/* Find the conversion specifier. */
fc = *f++;
if (skip_space || (fc != L_('[') && fc != L_('c')
&& fc != L_('C') && fc != L_('n')))
{
/* Eat whitespace. */
int save_errno = errno;
errno = 0;
do
if (__builtin_expect (inchar () == EOF && errno == EINTR, 0))
input_error ();
while (ISSPACE (c));
errno = save_errno;
ungetc (c, s);
skip_space = 0;
}
switch (fc)
{
case L_('%'): /* Must match a literal '%'. */
c = inchar ();
if (__builtin_expect (c == EOF, 0))
input_error ();
if (__builtin_expect (c != fc, 0))
{
ungetc_not_eof (c, s);
conv_error ();
}
break;
case L_('n'): /* Answer number of assignments done. */
/* Corrigendum 1 to ISO C 1990 describes the allowed flags
with the 'n' conversion specifier. */
if (!(flags & SUPPRESS))
{
/* Don't count the read-ahead. */
if (need_longlong && (flags & LONGDBL))
*ARG (long long int *) = read_in;
else if (need_long && (flags & LONG))
*ARG (long int *) = read_in;
else if (flags & SHORT)
*ARG (short int *) = read_in;
else if (!(flags & CHAR))
*ARG (int *) = read_in;
else
*ARG (char *) = 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 L_('c'): /* Match characters. */
if ((flags & LONG) == 0)
{
if (!(flags & SUPPRESS))
{
str = ARG (char *);
if (str == NULL)
conv_error ();
}
c = inchar ();
if (__builtin_expect (c == EOF, 0))
input_error ();
if (width == -1)
width = 1;
#ifdef COMPILE_WSCANF
/* We have to convert the wide character(s) into multibyte
characters and store the result. */
memset (&state, '\0', sizeof (state));
do
{
size_t n;
n = __wcrtomb (!(flags & SUPPRESS) ? str : NULL, c, &state);
if (__builtin_expect (n == (size_t) -1, 0))
/* No valid wide character. */
input_error ();
/* Increment the output pointer. Even if we don't
write anything. */
str += n;
}
while (--width > 0 && inchar () != EOF);
#else
if (!(flags & SUPPRESS))
{
do
*str++ = c;
while (--width > 0 && inchar () != EOF);
}
else
while (--width > 0 && inchar () != EOF);
#endif
if (!(flags & SUPPRESS))
++done;
break;
}
/* FALLTHROUGH */
case L_('C'):
if (!(flags & SUPPRESS))
{
wstr = ARG (wchar_t *);
if (wstr == NULL)
conv_error ();
}
c = inchar ();
if (__builtin_expect (c == EOF, 0))
input_error ();
#ifdef COMPILE_WSCANF
/* Just store the incoming wide characters. */
if (!(flags & SUPPRESS))
{
do
*wstr++ = c;
while (--width > 0 && inchar () != EOF);
}
else
while (--width > 0 && inchar () != EOF);
#else
{
/* We have to convert the multibyte input sequence to wide
characters. */
char buf[1];
mbstate_t cstate;
memset (&cstate, '\0', sizeof (cstate));
do
{
/* This is what we present the mbrtowc function first. */
buf[0] = c;
while (1)
{
size_t n;
n = __mbrtowc (!(flags & SUPPRESS) ? wstr : NULL,
buf, 1, &cstate);
if (n == (size_t) -2)
{
/* Possibly correct character, just not enough
input. */
if (__builtin_expect (inchar () == EOF, 0))
encode_error ();
buf[0] = c;
continue;
}
if (__builtin_expect (n != 1, 0))
encode_error ();
/* We have a match. */
break;
}
/* Advance the result pointer. */
++wstr;
}
while (--width > 0 && inchar () != EOF);
}
#endif
if (!(flags & SUPPRESS))
++done;
break;
case L_('s'): /* Read a string. */
if (!(flags & LONG))
{
#define STRING_ARG(Str, Type) \
do 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 = (char *) malloc (strsize * sizeof (Type)); \
Str = (Type *) *strptr; \
} \
else \
Str = ARG (Type *); \
if (Str == NULL) \
conv_error (); \
} while (0)
STRING_ARG (str, char);
c = inchar ();
if (__builtin_expect (c == EOF, 0))
input_error ();
#ifdef COMPILE_WSCANF
memset (&state, '\0', sizeof (state));
#endif
do
{
if (ISSPACE (c))
{
ungetc_not_eof (c, s);
break;
}
#ifdef COMPILE_WSCANF
/* This is quite complicated. We have to convert the
wide characters into multibyte characters and then
store them. */
{
size_t n;
if (!(flags & SUPPRESS) && (flags & MALLOC)
&& str + MB_CUR_MAX >= *strptr + strsize)
{
/* We have to enlarge the buffer if the `a' flag
was given. */
size_t strleng = str - *strptr;
char *newstr;
newstr = (char *) realloc (*strptr, strsize * 2);
if (newstr == NULL)
{
/* Can't allocate that much. Last-ditch
effort. */
newstr = (char *) realloc (*strptr,
strleng + MB_CUR_MAX);
if (newstr == NULL)
{
/* We lose. Oh well. Terminate the
string and stop converting,
so at least we don't skip any input. */
((char *) (*strptr))[strleng] = '\0';
++done;
conv_error ();
}
else
{
*strptr = newstr;
str = newstr + strleng;
strsize = strleng + MB_CUR_MAX;
}
}
else
{
*strptr = newstr;
str = newstr + strleng;
strsize *= 2;
}
}
n = __wcrtomb (!(flags & SUPPRESS) ? str : NULL, c,
&state);
if (__builtin_expect (n == (size_t) -1, 0))
encode_error ();
assert (n <= MB_CUR_MAX);
str += n;
}
#else
/* This is easy. */
if (!(flags & SUPPRESS))
{
*str++ = c;
if ((flags & MALLOC)
&& (char *) str == *strptr + strsize)
{
/* Enlarge the buffer. */
str = (char *) realloc (*strptr, 2 * strsize);
if (str == NULL)
{
/* Can't allocate that much. Last-ditch
effort. */
str = (char *) realloc (*strptr, strsize + 1);
if (str == NULL)
{
/* We lose. Oh well. Terminate the
string and stop converting,
so at least we don't skip any input. */
((char *) (*strptr))[strsize - 1] = '\0';
++done;
conv_error ();
}
else
{
*strptr = (char *) str;
str += strsize;
++strsize;
}
}
else
{
*strptr = (char *) str;
str += strsize;
strsize *= 2;
}
}
}
#endif
}
while ((width <= 0 || --width > 0) && inchar () != EOF);
if (!(flags & SUPPRESS))
{
#ifdef COMPILE_WSCANF
/* We have to emit the code to get into the initial
state. */
char buf[MB_LEN_MAX];
size_t n = __wcrtomb (buf, L'\0', &state);
if (n > 0 && (flags & MALLOC)
&& str + n >= *strptr + strsize)
{
/* Enlarge the buffer. */
size_t strleng = str - *strptr;
char *newstr;
newstr = (char *) realloc (*strptr, strleng + n + 1);
if (newstr == NULL)
{
/* We lose. Oh well. Terminate the string
and stop converting, so at least we don't
skip any input. */
((char *) (*strptr))[strleng] = '\0';
++done;
conv_error ();
}
else
{
*strptr = newstr;
str = newstr + strleng;
strsize = strleng + n + 1;
}
}
str = __mempcpy (str, buf, n);
#endif
*str++ = '\0';
if ((flags & MALLOC) && str - *strptr != strsize)
{
char *cp = (char *) realloc (*strptr, str - *strptr);
if (cp != NULL)
*strptr = cp;
}
++done;
}
break;
}
/* FALLTHROUGH */
case L_('S'):
{
#ifndef COMPILE_WSCANF
mbstate_t cstate;
#endif
/* Wide character string. */
STRING_ARG (wstr, wchar_t);
c = inchar ();
if (__builtin_expect (c == EOF, 0))
input_error ();
#ifndef COMPILE_WSCANF
memset (&cstate, '\0', sizeof (cstate));
#endif
do
{
if (ISSPACE (c))
{
ungetc_not_eof (c, s);
break;
}
#ifdef COMPILE_WSCANF
/* This is easy. */
if (!(flags & SUPPRESS))
{
*wstr++ = c;
if ((flags & MALLOC)
&& wstr == (wchar_t *) *strptr + strsize)
{
/* Enlarge the buffer. */
wstr = (wchar_t *) realloc (*strptr,
(2 * strsize)
* sizeof (wchar_t));
if (wstr == NULL)
{
/* Can't allocate that much. Last-ditch
effort. */
wstr = (wchar_t *) realloc (*strptr,
(strsize + 1)
* sizeof (wchar_t));
if (wstr == NULL)
{
/* We lose. Oh well. Terminate the string
and stop converting, so at least we don't
skip any input. */
((wchar_t *) (*strptr))[strsize - 1] = L'\0';
++done;
conv_error ();
}
else
{
*strptr = (char *) wstr;
wstr += strsize;
++strsize;
}
}
else
{
*strptr = (char *) wstr;
wstr += strsize;
strsize *= 2;
}
}
}
#else
{
char buf[1];
buf[0] = c;
while (1)
{
size_t n;
n = __mbrtowc (!(flags & SUPPRESS) ? wstr : NULL,
buf, 1, &cstate);
if (n == (size_t) -2)
{
/* Possibly correct character, just not enough
input. */
if (__builtin_expect (inchar () == EOF, 0))
encode_error ();
buf[0] = c;
continue;
}
if (__builtin_expect (n != 1, 0))
encode_error ();
/* We have a match. */
++wstr;
break;
}
if (!(flags & SUPPRESS) && (flags & MALLOC)
&& wstr == (wchar_t *) *strptr + strsize)
{
/* Enlarge the buffer. */
wstr = (wchar_t *) realloc (*strptr,
(2 * strsize
* sizeof (wchar_t)));
if (wstr == NULL)
{
/* Can't allocate that much. Last-ditch effort. */
wstr = (wchar_t *) realloc (*strptr,
((strsize + 1)
* sizeof (wchar_t)));
if (wstr == NULL)
{
/* We lose. Oh well. Terminate the
string and stop converting, so at
least we don't skip any input. */
((wchar_t *) (*strptr))[strsize - 1] = L'\0';
++done;
conv_error ();
}
else
{
*strptr = (char *) wstr;
wstr += strsize;
++strsize;
}
}
else
{
*strptr = (char *) wstr;
wstr += strsize;
strsize *= 2;
}
}
}
#endif
}
while ((width <= 0 || --width > 0) && inchar () != EOF);
if (!(flags & SUPPRESS))
{
*wstr++ = L'\0';
if ((flags & MALLOC) && wstr - (wchar_t *) *strptr != strsize)
{
wchar_t *cp = (wchar_t *) realloc (*strptr,
((wstr
- (wchar_t *) *strptr)
* sizeof(wchar_t)));
if (cp != NULL)
*strptr = (char *) cp;
}
++done;
}
}
break;
case L_('x'): /* Hexadecimal integer. */
case L_('X'): /* Ditto. */
base = 16;
number_signed = 0;
goto number;
case L_('o'): /* Octal integer. */
base = 8;
number_signed = 0;
goto number;
case L_('u'): /* Unsigned decimal integer. */
base = 10;
number_signed = 0;
goto number;
case L_('d'): /* Signed decimal integer. */
base = 10;
number_signed = 1;
goto number;
case L_('i'): /* Generic number. */
base = 0;
number_signed = 1;
number:
c = inchar ();
if (__builtin_expect (c == EOF, 0))
input_error ();
/* Check for a sign. */
if (c == L_('-') || c == L_('+'))
{
ADDW (c);
if (width > 0)
--width;
c = inchar ();
}
/* Look for a leading indication of base. */
if (width != 0 && c == L_('0'))
{
if (width > 0)
--width;
ADDW (c);
c = inchar ();
if (width != 0 && TOLOWER (c) == L_('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;
if (base == 10 && __builtin_expect ((flags & I18N) != 0, 0))
{
int from_level;
int to_level;
int level;
#ifdef COMPILE_WSCANF
const wchar_t *wcdigits[10];
const wchar_t *wcdigits_extended[10];
#else
const char *mbdigits[10];
const char *mbdigits_extended[10];
#endif
/* "to_inpunct" is a map from ASCII digits to their
equivalent in locale. This is defined for locales
which use an extra digits set. */
wctrans_t map = __wctrans ("to_inpunct");
int n;
from_level = 0;
#ifdef COMPILE_WSCANF
to_level = _NL_CURRENT_WORD (LC_CTYPE,
_NL_CTYPE_INDIGITS_WC_LEN) - 1;
#else
to_level = (uint32_t) curctype->values[_NL_ITEM_INDEX (_NL_CTYPE_INDIGITS_MB_LEN)].word - 1;
#endif
/* Get the alternative digit forms if there are any. */
if (__builtin_expect (map != NULL, 0))
{
/* Adding new level for extra digits set in locale file. */
++to_level;
for (n = 0; n < 10; ++n)
{
#ifdef COMPILE_WSCANF
wcdigits[n] = (const wchar_t *)
_NL_CURRENT (LC_CTYPE, _NL_CTYPE_INDIGITS0_WC + n);
wchar_t *wc_extended = (wchar_t *)
alloca ((to_level + 2) * sizeof (wchar_t));
__wmemcpy (wc_extended, wcdigits[n], to_level);
wc_extended[to_level] = __towctrans (L'0' + n, map);
wc_extended[to_level + 1] = '\0';
wcdigits_extended[n] = wc_extended;
#else
mbdigits[n]
= curctype->values[_NL_CTYPE_INDIGITS0_MB + n].string;
/* Get the equivalent wide char in map. */
wint_t extra_wcdigit = __towctrans (L'0' + n, map);
/* Convert it to multibyte representation. */
mbstate_t state;
memset (&state, '\0', sizeof (state));
char extra_mbdigit[MB_LEN_MAX];
size_t mblen
= __wcrtomb (extra_mbdigit, extra_wcdigit, &state);
if (mblen == (size_t) -1)
{
/* Ignore this new level. */
map = NULL;
break;
}
/* Calculate the length of mbdigits[n]. */
const char *last_char = mbdigits[n];
for (level = 0; level < to_level; ++level)
last_char = strchr (last_char, '\0') + 1;
size_t mbdigits_len = last_char - mbdigits[n];
/* Allocate memory for extended multibyte digit. */
char *mb_extended;
mb_extended = (char *) alloca (mbdigits_len + mblen + 1);
/* And get the mbdigits + extra_digit string. */
*(char *) __mempcpy (__mempcpy (mb_extended, mbdigits[n],
mbdigits_len),
extra_mbdigit, mblen) = '\0';
mbdigits_extended[n] = mb_extended;
#endif
}
}
/* Read the number into workspace. */
while (c != EOF && width != 0)
{
/* In this round we get the pointer to the digit strings
and also perform the first round of comparisons. */
for (n = 0; n < 10; ++n)
{
/* Get the string for the digits with value N. */
#ifdef COMPILE_WSCANF
if (__builtin_expect (map != NULL, 0))
wcdigits[n] = wcdigits_extended[n];
else
wcdigits[n] = (const wchar_t *)
_NL_CURRENT (LC_CTYPE, _NL_CTYPE_INDIGITS0_WC + n);
wcdigits[n] += from_level;
if (c == (wint_t) *wcdigits[n])
{
to_level = from_level;
break;
}
/* Advance the pointer to the next string. */
++wcdigits[n];
#else
const char *cmpp;
int avail = width > 0 ? width : INT_MAX;
if (__builtin_expect (map != NULL, 0))
mbdigits[n] = mbdigits_extended[n];
else
mbdigits[n]
= curctype->values[_NL_CTYPE_INDIGITS0_MB + n].string;
for (level = 0; level < from_level; level++)
mbdigits[n] = strchr (mbdigits[n], '\0') + 1;
cmpp = mbdigits[n];
while ((unsigned char) *cmpp == c && avail > 0)
{
if (*++cmpp == '\0')
break;
else
{
if ((c = inchar ()) == EOF)
break;
--avail;
}
}
if (*cmpp == '\0')
{
if (width > 0)
width = avail;
to_level = from_level;
break;
}
/* We are pushing all read characters back. */
if (cmpp > mbdigits[n])
{
ungetc (c, s);
while (--cmpp > mbdigits[n])
ungetc_not_eof ((unsigned char) *cmpp, s);
c = (unsigned char) *cmpp;
}
/* Advance the pointer to the next string. */
mbdigits[n] = strchr (mbdigits[n], '\0') + 1;
#endif
}
if (n == 10)
{
/* Have not yet found the digit. */
for (level = from_level + 1; level <= to_level; ++level)
{
/* Search all ten digits of this level. */
for (n = 0; n < 10; ++n)
{
#ifdef COMPILE_WSCANF
if (c == (wint_t) *wcdigits[n])
break;
/* Advance the pointer to the next string. */
++wcdigits[n];
#else
const char *cmpp;
int avail = width > 0 ? width : INT_MAX;
cmpp = mbdigits[n];
while ((unsigned char) *cmpp == c && avail > 0)
{
if (*++cmpp == '\0')
break;
else
{
if ((c = inchar ()) == EOF)
break;
--avail;
}
}
if (*cmpp == '\0')
{
if (width > 0)
width = avail;
break;
}
/* We are pushing all read characters back. */
if (cmpp > mbdigits[n])
{
ungetc (c, s);
while (--cmpp > mbdigits[n])
ungetc_not_eof ((unsigned char) *cmpp, s);
c = (unsigned char) *cmpp;
}
/* Advance the pointer to the next string. */
mbdigits[n] = strchr (mbdigits[n], '\0') + 1;
#endif
}
if (n < 10)
{
/* Found it. */
from_level = level;
to_level = level;
break;
}
}
}
if (n < 10)
c = L_('0') + n;
else if ((flags & GROUP)
#ifdef COMPILE_WSCANF
&& thousands != L'\0'
#else
&& thousands != NULL
#endif
)
{
/* Try matching against the thousands separator. */
#ifdef COMPILE_WSCANF
if (c != thousands)
break;
#else
const char *cmpp = thousands;
int avail = width > 0 ? width : INT_MAX;
while ((unsigned char) *cmpp == c && avail > 0)
{
ADDW (c);
if (*++cmpp == '\0')
break;
else
{
if ((c = inchar ()) == EOF)
break;
--avail;
}
}
if (*cmpp != '\0')
{
/* We are pushing all read characters back. */
if (cmpp > thousands)
{
wpsize -= cmpp - thousands;
ungetc (c, s);
while (--cmpp > thousands)
ungetc_not_eof ((unsigned char) *cmpp, s);
c = (unsigned char) *cmpp;
}
break;
}
if (width > 0)
width = avail;
/* The last thousands character will be added back by
the ADDW below. */
--wpsize;
#endif
}
else
break;
ADDW (c);
if (width > 0)
--width;
c = inchar ();
}
}
else
/* Read the number into workspace. */
while (c != EOF && width != 0)
{
if (base == 16)
{
if (!ISXDIGIT (c))
break;
}
else if (!ISDIGIT (c) || (int) (c - L_('0')) >= base)
{
if (base == 10 && (flags & GROUP)
#ifdef COMPILE_WSCANF
&& thousands != L'\0'
#else
&& thousands != NULL
#endif
)
{
/* Try matching against the thousands separator. */
#ifdef COMPILE_WSCANF
if (c != thousands)
break;
#else
const char *cmpp = thousands;
int avail = width > 0 ? width : INT_MAX;
while ((unsigned char) *cmpp == c && avail > 0)
{
ADDW (c);
if (*++cmpp == '\0')
break;
else
{
if ((c = inchar ()) == EOF)
break;
--avail;
}
}
if (*cmpp != '\0')
{
/* We are pushing all read characters back. */
if (cmpp > thousands)
{
wpsize -= cmpp - thousands;
ungetc (c, s);
while (--cmpp > thousands)
ungetc_not_eof ((unsigned char) *cmpp, s);
c = (unsigned char) *cmpp;
}
break;
}
if (width > 0)
width = avail;
/* The last thousands character will be added back by
the ADDW below. */
--wpsize;
#endif
}
else
break;
}
ADDW (c);
if (width > 0)
--width;
c = inchar ();
}
if (wpsize == 0
|| (wpsize == 1 && (wp[0] == L_('+') || wp[0] == L_('-'))))
{
/* There was no number. If we are supposed to read a pointer
we must recognize "(nil)" as well. */
if (__builtin_expect (wpsize == 0
&& read_pointer
&& (width < 0 || width >= 0)
&& c == '('
&& TOLOWER (inchar ()) == L_('n')
&& TOLOWER (inchar ()) == L_('i')
&& TOLOWER (inchar ()) == L_('l')
&& inchar () == L_(')'), 1))
/* We must produce the value of a NULL pointer. A single
'0' digit is enough. */
ADDW (L_('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 (L_('\0'));
if (need_longlong && (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 (__builtin_expect (wp == tw, 0))
conv_error ();
if (!(flags & SUPPRESS))
{
if (! number_signed)
{
if (need_longlong && (flags & LONGDBL))
*ARG (unsigned LONGLONG int *) = num.uq;
else if (need_long && (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 int *) = (unsigned int) num.ul;
else
*ARG (unsigned char *) = (unsigned char) num.ul;
}
else
{
if (need_longlong && (flags & LONGDBL))
*ARG (LONGLONG int *) = num.q;
else if (need_long && (flags & LONG))
*ARG (long int *) = num.l;
else if (flags & SHORT)
*ARG (short int *) = (short int) num.l;
else if (!(flags & CHAR))
*ARG (int *) = (int) num.l;
else
*ARG (signed char *) = (signed char) num.ul;
}
++done;
}
break;
case L_('e'): /* Floating-point numbers. */
case L_('E'):
case L_('f'):
case L_('F'):
case L_('g'):
case L_('G'):
case L_('a'):
case L_('A'):
c = inchar ();
if (__builtin_expect (c == EOF, 0))
input_error ();
got_dot = got_e = 0;
/* Check for a sign. */
if (c == L_('-') || c == L_('+'))
{
negative = c == L_('-');
if (__builtin_expect (width == 0 || inchar () == EOF, 0))
/* 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) == L_('n'))
{
/* Maybe "nan". */
ADDW (c);
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('a'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('n'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
/* It is "nan". */
goto scan_float;
}
else if (TOLOWER (c) == L_('i'))
{
/* Maybe "inf" or "infinity". */
ADDW (c);
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('n'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('f'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
/* It is as least "inf". */
if (width != 0 && inchar () != EOF)
{
if (TOLOWER (c) == L_('i'))
{
if (width > 0)
--width;
/* Now we have to read the rest as well. */
ADDW (c);
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('n'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('i'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('t'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('y'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
}
else
/* Never mind. */
ungetc (c, s);
}
goto scan_float;
}
is_hexa = 0;
exp_char = L_('e');
if (width != 0 && c == L_('0'))
{
ADDW (c);
c = inchar ();
if (width > 0)
--width;
if (width != 0 && TOLOWER (c) == L_('x'))
{
/* It is a number in hexadecimal format. */
ADDW (c);
is_hexa = 1;
exp_char = L_('p');
/* Grouping is not allowed. */
flags &= ~GROUP;
c = inchar ();
if (width > 0)
--width;
}
}
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 == L_('-') || c == L_('+')))
ADDW (c);
else if (wpsize > 0 && !got_e
&& (CHAR_T) TOLOWER (c) == exp_char)
{
ADDW (exp_char);
got_e = got_dot = 1;
}
else
{
#ifdef COMPILE_WSCANF
if (! got_dot && c == decimal)
{
ADDW (c);
got_dot = 1;
}
else if ((flags & GROUP) != 0 && thousands != L'\0'
&& ! got_dot && c == thousands)
ADDW (c);
else
{
/* The last read character is not part of the number
anymore. */
ungetc (c, s);
break;
}
#else
const char *cmpp = decimal;
int avail = width > 0 ? width : INT_MAX;
if (! got_dot)
{
while ((unsigned char) *cmpp == c && avail > 0)
if (*++cmpp == '\0')
break;
else
{
if (inchar () == EOF)
break;
--avail;
}
}
if (*cmpp == '\0')
{
/* Add all the characters. */
for (cmpp = decimal; *cmpp != '\0'; ++cmpp)
ADDW ((unsigned char) *cmpp);
if (width > 0)
width = avail;
got_dot = 1;
}
else
{
/* Figure out whether it is a thousands separator.
There is one problem: we possibly read more than
one character. We cannot push them back but since
we know that parts of the `decimal' string matched,
we can compare against it. */
const char *cmp2p = thousands;
if ((flags & GROUP) != 0 && thousands != NULL
&& ! got_dot)
{
while (cmp2p - thousands < cmpp - decimal
&& *cmp2p == decimal[cmp2p - thousands])
++cmp2p;
if (cmp2p - thousands == cmpp - decimal)
{
while ((unsigned char) *cmp2p == c && avail > 0)
if (*++cmp2p == '\0')
break;
else
{
if (inchar () == EOF)
break;
--avail;
}
}
}
if (cmp2p != NULL && *cmp2p == '\0')
{
/* Add all the characters. */
for (cmpp = thousands; *cmpp != '\0'; ++cmpp)
ADDW ((unsigned char) *cmpp);
if (width > 0)
width = avail;
}
else
{
/* The last read character is not part of the number
anymore. */
ungetc (c, s);
break;
}
}
#endif
}
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 or no exponent this is an error. */
if (__builtin_expect (wpsize == 0
|| (is_hexa && (wpsize == 2 || ! got_e)), 0))
conv_error ();
scan_float:
/* Convert the number. */
ADDW (L_('\0'));
if ((flags & LONGDBL) && !__ldbl_is_dbl)
{
long double d = __strtold_internal (wp, &tw, flags & GROUP);
if (!(flags & SUPPRESS) && tw != wp)
*ARG (long double *) = negative ? -d : d;
}
else if (flags & (LONG | LONGDBL))
{
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 (__builtin_expect (tw == wp, 0))
conv_error ();
if (!(flags & SUPPRESS))
++done;
break;
case L_('['): /* Character class. */
if (flags & LONG)
STRING_ARG (wstr, wchar_t);
else
STRING_ARG (str, char);
if (*f == L_('^'))
{
++f;
not_in = 1;
}
else
not_in = 0;
if (width < 0)
/* There is no width given so there is also no limit on the
number of characters we read. Therefore we set width to
a very high value to make the algorithm easier. */
width = INT_MAX;
#ifdef COMPILE_WSCANF
/* Find the beginning and the end of the scanlist. We are not
creating a lookup table since it would have to be too large.
Instead we search each time through the string. This is not
a constant lookup time but who uses this feature deserves to
be punished. */
tw = (wchar_t *) f; /* Marks the beginning. */
if (*f == L']')
++f;
while ((fc = *f++) != L'\0' && fc != L']');
if (__builtin_expect (fc == L'\0', 0))
conv_error ();
wp = (wchar_t *) f - 1;
#else
/* Fill WP with byte flags indexed by character.
We will use this flag map for matching input characters. */
if (wpmax < UCHAR_MAX + 1)
{
wpmax = UCHAR_MAX + 1;
wp = (char *) alloca (wpmax);
}
memset (wp, '\0', UCHAR_MAX + 1);
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 = (unsigned char) f[-2]; fc < (unsigned char) *f; ++fc)
wp[fc] = 1;
}
else
/* Add the character to the flag map. */
wp[fc] = 1;
if (__builtin_expect (fc == '\0', 0))
conv_error();
#endif
if (flags & LONG)
{
size_t now = read_in;
#ifdef COMPILE_WSCANF
if (__builtin_expect (inchar () == WEOF, 0))
input_error ();
do
{
wchar_t *runp;
/* Test whether it's in the scanlist. */
runp = tw;
while (runp < wp)
{
if (runp[0] == L'-' && runp[1] != '\0' && runp + 1 != wp
&& runp != tw
&& (unsigned int) runp[-1] <= (unsigned int) runp[1])
{
/* Match against all characters in between the
first and last character of the sequence. */
wchar_t wc;
for (wc = runp[-1] + 1; wc <= runp[1]; ++wc)
if ((wint_t) wc == c)
break;
if (wc <= runp[1] && !not_in)
break;
if (wc <= runp[1] && not_in)
{
/* The current character is not in the
scanset. */
ungetc (c, s);
goto out;
}
runp += 2;
}
else
{
if ((wint_t) *runp == c && !not_in)
break;
if ((wint_t) *runp == c && not_in)
{
ungetc (c, s);
goto out;
}
++runp;
}
}
if (runp == wp && !not_in)
{
ungetc (c, s);
goto out;
}
if (!(flags & SUPPRESS))
{
*wstr++ = c;
if ((flags & MALLOC)
&& wstr == (wchar_t *) *strptr + strsize)
{
/* Enlarge the buffer. */
wstr = (wchar_t *) realloc (*strptr,
(2 * strsize)
* sizeof (wchar_t));
if (wstr == NULL)
{
/* Can't allocate that much. Last-ditch
effort. */
wstr = (wchar_t *)
realloc (*strptr, (strsize + 1)
* sizeof (wchar_t));
if (wstr == NULL)
{
/* We lose. Oh well. Terminate the string
and stop converting, so at least we don't
skip any input. */
((wchar_t *) (*strptr))[strsize - 1] = L'\0';
++done;
conv_error ();
}
else
{
*strptr = (char *) wstr;
wstr += strsize;
++strsize;
}
}
else
{
*strptr = (char *) wstr;
wstr += strsize;
strsize *= 2;
}
}
}
}
while (--width > 0 && inchar () != WEOF);
out:
#else
char buf[MB_LEN_MAX];
size_t cnt = 0;
mbstate_t cstate;
if (__builtin_expect (inchar () == EOF, 0))
input_error ();
memset (&cstate, '\0', sizeof (cstate));
do
{
if (wp[c] == not_in)
{
ungetc_not_eof (c, s);
break;
}
/* This is easy. */
if (!(flags & SUPPRESS))
{
size_t n;
/* Convert it into a wide character. */
buf[0] = c;
n = __mbrtowc (wstr, buf, 1, &cstate);
if (n == (size_t) -2)
{
/* Possibly correct character, just not enough
input. */
++cnt;
assert (cnt < MB_CUR_MAX);
continue;
}
cnt = 0;
++wstr;
if ((flags & MALLOC)
&& wstr == (wchar_t *) *strptr + strsize)
{
/* Enlarge the buffer. */
wstr = (wchar_t *) realloc (*strptr,
(2 * strsize
* sizeof (wchar_t)));
if (wstr == NULL)
{
/* Can't allocate that much. Last-ditch
effort. */
wstr = (wchar_t *)
realloc (*strptr, ((strsize + 1)
* sizeof (wchar_t)));
if (wstr == NULL)
{
/* We lose. Oh well. Terminate the
string and stop converting,
so at least we don't skip any input. */
((wchar_t *) (*strptr))[strsize - 1] = L'\0';
++done;
conv_error ();
}
else
{
*strptr = (char *) wstr;
wstr += strsize;
++strsize;
}
}
else
{
*strptr = (char *) wstr;
wstr += strsize;
strsize *= 2;
}
}
}
if (--width <= 0)
break;
}
while (inchar () != EOF);
if (__builtin_expect (cnt != 0, 0))
/* We stopped in the middle of recognizing another
character. That's a problem. */
encode_error ();
#endif
if (__builtin_expect (now == read_in, 0))
/* We haven't succesfully read any character. */
conv_error ();
if (!(flags & SUPPRESS))
{
*wstr++ = L'\0';
if ((flags & MALLOC)
&& wstr - (wchar_t *) *strptr != strsize)
{
wchar_t *cp = (wchar_t *)
realloc (*strptr, ((wstr - (wchar_t *) *strptr)
* sizeof(wchar_t)));
if (cp != NULL)
*strptr = (char *) cp;
}
++done;
}
}
else
{
size_t now = read_in;
if (__builtin_expect (inchar () == EOF, 0))
input_error ();
#ifdef COMPILE_WSCANF
memset (&state, '\0', sizeof (state));
do
{
wchar_t *runp;
size_t n;
/* Test whether it's in the scanlist. */
runp = tw;
while (runp < wp)
{
if (runp[0] == L'-' && runp[1] != '\0' && runp + 1 != wp
&& runp != tw
&& (unsigned int) runp[-1] <= (unsigned int) runp[1])
{
/* Match against all characters in between the
first and last character of the sequence. */
wchar_t wc;
for (wc = runp[-1] + 1; wc <= runp[1]; ++wc)
if ((wint_t) wc == c)
break;
if (wc <= runp[1] && !not_in)
break;
if (wc <= runp[1] && not_in)
{
/* The current character is not in the
scanset. */
ungetc (c, s);
goto out2;
}
runp += 2;
}
else
{
if ((wint_t) *runp == c && !not_in)
break;
if ((wint_t) *runp == c && not_in)
{
ungetc (c, s);
goto out2;
}
++runp;
}
}
if (runp == wp && !not_in)
{
ungetc (c, s);
goto out2;
}
if (!(flags & SUPPRESS))
{
if ((flags & MALLOC)
&& str + MB_CUR_MAX >= *strptr + strsize)
{
/* Enlarge the buffer. */
size_t strleng = str - *strptr;
char *newstr;
newstr = (char *) realloc (*strptr, 2 * strsize);
if (newstr == NULL)
{
/* Can't allocate that much. Last-ditch
effort. */
newstr = (char *) realloc (*strptr,
strleng + MB_CUR_MAX);
if (newstr == NULL)
{
/* We lose. Oh well. Terminate the string
and stop converting, so at least we don't
skip any input. */
((char *) (*strptr))[strleng] = '\0';
++done;
conv_error ();
}
else
{
*strptr = newstr;
str = newstr + strleng;
strsize = strleng + MB_CUR_MAX;
}
}
else
{
*strptr = newstr;
str = newstr + strleng;
strsize *= 2;
}
}
}
n = __wcrtomb (!(flags & SUPPRESS) ? str : NULL, c, &state);
if (__builtin_expect (n == (size_t) -1, 0))
encode_error ();
assert (n <= MB_CUR_MAX);
str += n;
}
while (--width > 0 && inchar () != WEOF);
out2:
#else
do
{
if (wp[c] == not_in)
{
ungetc_not_eof (c, s);
break;
}
/* This is easy. */
if (!(flags & SUPPRESS))
{
*str++ = c;
if ((flags & MALLOC)
&& (char *) str == *strptr + strsize)
{
/* Enlarge the buffer. */
size_t newsize = 2 * strsize;
allocagain:
str = (char *) realloc (*strptr, newsize);
if (str == NULL)
{
/* Can't allocate that much. Last-ditch
effort. */
if (newsize > strsize + 1)
{
newsize = strsize + 1;
goto allocagain;
}
/* We lose. Oh well. Terminate the
string and stop converting,
so at least we don't skip any input. */
((char *) (*strptr))[strsize - 1] = '\0';
++done;
conv_error ();
}
else
{
*strptr = (char *) str;
str += strsize;
strsize = newsize;
}
}
}
}
while (--width > 0 && inchar () != EOF);
#endif
if (__builtin_expect (now == read_in, 0))
/* We haven't succesfully read any character. */
conv_error ();
if (!(flags & SUPPRESS))
{
#ifdef COMPILE_WSCANF
/* We have to emit the code to get into the initial
state. */
char buf[MB_LEN_MAX];
size_t n = __wcrtomb (buf, L'\0', &state);
if (n > 0 && (flags & MALLOC)
&& str + n >= *strptr + strsize)
{
/* Enlarge the buffer. */
size_t strleng = str - *strptr;
char *newstr;
newstr = (char *) realloc (*strptr, strleng + n + 1);
if (newstr == NULL)
{
/* We lose. Oh well. Terminate the string
and stop converting, so at least we don't
skip any input. */
((char *) (*strptr))[strleng] = '\0';
++done;
conv_error ();
}
else
{
*strptr = newstr;
str = newstr + strleng;
strsize = strleng + n + 1;
}
}
str = __mempcpy (str, buf, n);
#endif
*str++ = '\0';
if ((flags & MALLOC) && str - *strptr != strsize)
{
char *cp = (char *) realloc (*strptr, str - *strptr);
if (cp != NULL)
*strptr = cp;
}
++done;
}
}
break;
case L_('p'): /* Generic pointer. */
base = 16;
/* A PTR must be the same size as a `long int'. */
flags &= ~(SHORT|LONGDBL);
if (need_long)
flags |= LONG;
number_signed = 0;
read_pointer = 1;
goto number;
default:
/* If this is an unknown format character punt. */
conv_error ();
}
}
/* 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);
}
errout:
/* Unlock stream. */
UNLOCK_STREAM (s);
if (errp != NULL)
*errp |= errval;
return done;
}
#ifdef COMPILE_WSCANF
int
__vfwscanf (FILE *s, const wchar_t *format, va_list argptr)
{
return _IO_vfwscanf (s, format, argptr, NULL);
}
ldbl_weak_alias (__vfwscanf, vfwscanf)
#else
int
___vfscanf (FILE *s, const char *format, va_list argptr)
{
return _IO_vfscanf_internal (s, format, argptr, NULL);
}
ldbl_strong_alias (_IO_vfscanf_internal, _IO_vfscanf)
ldbl_strong_alias (___vfscanf, __vfscanf)
ldbl_hidden_def (___vfscanf, __vfscanf)
ldbl_weak_alias (___vfscanf, vfscanf)
#endif
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