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glibc/stdio-common/vfscanf.c
Ulrich Drepper 9df541684a Update. 
1999-09-22  Andreas Jaeger  <aj@suse.de>

	* stdio-common/tstscanf.c (main): Add test case from PR libc/1313
	reported by Ben Caradoc-Davies <bmcd@physics.otago.ac.nz>.
		
1999-09-22  Andreas Schwab  <schwab@suse.de>

	* stdio-common/vfscanf.c: Fix width handling when scanning floats.

1999-04-02  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* elf/Makefile (CFLAGS-multiload.c): Change to allow building in
	the source directory.  Fixes PR libc/1059.
1999-09-22 16:03:46 +00:00

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/* Copyright (C) 1991,92,93,94,95,96,97,98,99 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. 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 WIDTH 0x040 /* width was given */
#define GROUP 0x080 /* ': group numbers */
#define MALLOC 0x100 /* a: malloc strings */
#define CHAR 0x200 /* hh: char */
#ifdef USE_IN_LIBIO
# include <libioP.h>
# include <libio.h>
# undef va_list
# define va_list _IO_va_list
# ifdef COMPILE_WPRINTF
# define ungetc(c, s) ((void) (c == WEOF \
|| (--read_in, \
_IO_sputbackwc (s, c))))
# define inchar() (c == WEOF ? WEOF \
: ((c = _IO_getwc_unlocked (s)), \
(void) (c != WEOF && ++read_in), 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 (s->_vtable_offset == 0 && _IO_fwide (s, 1) != 1)\
return EOF
# 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
# else
# define ungetc(c, s) ((void) ((int) c == EOF \
|| (--read_in, \
_IO_sputbackc (s, (unsigned char) c))))
# define inchar() (c == EOF ? EOF \
: ((c = _IO_getc_unlocked (s)), \
(void) (c != EOF && ++read_in), c))
# define MEMCPY(d, s, n) memcpy (d, s, n)
# define ISSPACE(Ch) isspace (Ch)
# define ISDIGIT(Ch) isdigit (Ch)
# define ISXDIGIT(Ch) isxdigit (Ch)
# define TOLOWER(Ch) tolower (Ch)
# define ORIENT if (_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 { \
if (errp != NULL) *errp |= 4; \
_IO_funlockfile (s); \
__libc_cleanup_end (0); \
__set_errno (EILSEQ); \
return done; \
} while (0)
# define conv_error() do { \
if (errp != NULL) *errp |= 2; \
_IO_funlockfile (s); \
__libc_cleanup_end (0); \
return done; \
} while (0)
# define input_error() do { \
_IO_funlockfile (s); \
if (errp != NULL) *errp |= 1; \
__libc_cleanup_end (0); \
return done ?: EOF; \
} while (0)
# define memory_error() do { \
_IO_funlockfile (s); \
__set_errno (ENOMEM); \
__libc_cleanup_end (0); \
return EOF; \
} 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 ((void (*) (void *)) &_IO_funlockfile, (S)); \
_IO_flockfile (S)
# define UNLOCK_STREAM(S) \
_IO_funlockfile (S); \
__libc_cleanup_region_end (0)
#else
# define ungetc(c, s) ((void) (c != EOF && --read_in), ungetc (c, s))
# define inchar() (c == EOF ? EOF \
: ((c = getc (s)), (void) (c != EOF && ++read_in), c))
# define MEMCPY(d, s, n) memcpy (d, s, n)
# define ISSPACE(Ch) isspace (Ch)
# define ISDIGIT(Ch) isdigit (Ch)
# define ISXDIGIT(Ch) isxdigit (Ch)
# define TOLOWER(Ch) tolower (Ch)
# define L_(Str) Str
# define CHAR_T char
# define UCHAR_T unsigned char
# define WINT_T int
# define encode_error() do { \
funlockfile (s); \
__set_errno (EILSEQ); \
return done; \
} while (0)
# define conv_error() do { \
funlockfile (s); \
return done; \
} while (0)
# define input_error() do { \
funlockfile (s); \
return done ?: EOF; \
} while (0)
# define memory_error() do { \
funlockfile (s); \
__set_errno (ENOMEM); \
return EOF; \
} while (0)
# define ARGCHECK(s, format) \
do \
{ \
/* Check file argument for consistence. */ \
if (!__validfp (s) || !s->__mode.__read) \
{ \
__set_errno (EBADF); \
return EOF; \
} \
else if (format == NULL) \
{ \
__set_errno (EINVAL); \
return EOF; \
} \
} while (0)
#if 1
/* XXX For now !!! */
# define flockfile(S) /* nothing */
# define funlockfile(S) /* nothing */
# define LOCK_STREAM(S)
# define UNLOCK_STREAM(S)
#else
# define LOCK_STREAM(S) \
__libc_cleanup_region_start (&__funlockfile, (S)); \
__flockfile (S)
# define UNLOCK_STREAM(S) \
__funlockfile (S); \
__libc_cleanup_region_end (0)
#endif
#endif
/* 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 USE_IN_LIBIO
# ifdef COMPILE_WPRINTF
int
_IO_vfwscanf (s, format, argptr, errp)
_IO_FILE *s;
const wchar_t *format;
_IO_va_list argptr;
int *errp;
# else
int
_IO_vfscanf (s, format, argptr, errp)
_IO_FILE *s;
const char *format;
_IO_va_list argptr;
int *errp;
# endif
#else
int
__vfscanf (FILE *s, const char *format, va_list argptr)
#endif
{
va_list arg;
register const CHAR_T *f = format;
register UCHAR_T fc; /* Current character of the format. */
register size_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. */
/* 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. */
wchar_t decimal;
/* The thousands character of the current locale. */
wchar_t thousands;
/* 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;
size_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 > 2 * wpmax ? UCHAR_MAX : 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);
/* Figure out the decimal point character. */
memset (&state, '\0', sizeof (state));
if (__mbrtowc (&decimal, _NL_CURRENT (LC_NUMERIC, DECIMAL_POINT),
strlen (_NL_CURRENT (LC_NUMERIC, DECIMAL_POINT)), &state)
<= 0)
decimal = (wchar_t) *_NL_CURRENT (LC_NUMERIC, DECIMAL_POINT);
/* Figure out the thousands separator character. */
memset (&state, '\0', sizeof (state));
if (__mbrtowc (&thousands, _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP),
strlen (_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP)),
&state) <= 0)
thousands = (wchar_t) *_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
/* Lock the stream. */
LOCK_STREAM (s);
#ifndef COMPILE_WPRINTF
/* 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_WPRINTF
if (!isascii (*f))
{
/* Non-ASCII, may be a multibyte. */
int len = __mbrlen (f, strlen (f), &state);
if (len > 0)
{
do
{
c = inchar ();
if (c == EOF)
input_error ();
else if (c != *f++)
{
ungetc (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 (c == EOF)
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 (inchar () == EOF && errno == EINTR)
conv_error ();
skip_space = 0;
}
if (c != fc)
{
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 (*f))
{
argpos = *f++ - L_('0');
while (ISDIGIT (*f))
argpos = argpos * 10 + (*f++ - L_('0'));
if (*f == L_('$'))
++f;
else
{
/* Oops; that was actually the field width. */
width = argpos;
flags |= WIDTH;
argpos = 0;
goto got_width;
}
}
/* Check for the assignment-suppressing and the number grouping flag. */
while (*f == L_('*') || *f == L_('\''))
switch (*f++)
{
case L_('*'):
flags |= SUPPRESS;
break;
case L_('\''):
flags |= GROUP;
break;
}
/* We have seen width. */
if (ISDIGIT (*f))
flags |= WIDTH;
/* Find the maximum field width. */
width = 0;
while (ISDIGIT (*f))
{
width *= 10;
width += *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 (*f == L_('\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 (inchar () == EOF && errno == EINTR)
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 (c == EOF)
input_error ();
if (c != fc)
{
ungetc (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 (c == EOF)
input_error ();
if (width == -1)
width = 1;
#ifdef COMPILE_WPRINTF
/* 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 (n == (size_t) -1)
/* 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 (str == NULL)
conv_error ();
}
c = inchar ();
if (c == EOF)
input_error ();
#ifdef COMPILE_WPRINTF
/* 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[MB_LEN_MAX];
mbstate_t cstate;
memset (&cstate, '\0', sizeof (cstate));
do
{
size_t cnt;
/* This is what we present the mbrtowc function first. */
buf[0] = c;
cnt = 1;
while (1)
{
size_t n;
n = __mbrtowc (!(flags & SUPPRESS) ? wstr : NULL,
buf, cnt, &cstate);
if (n == (size_t) -2)
{
/* Possibly correct character, just not enough
input. */
assert (cnt < MB_CUR_MAX);
if (inchar () == EOF)
encode_error ();
buf[cnt++] = c;
continue;
}
if (n != cnt)
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 (c == EOF)
input_error ();
#ifdef COMPILE_WPRINTF
memset (&state, '\0', sizeof (state));
#endif
do
{
if (ISSPACE (c))
{
ungetc (c, s);
break;
}
#ifdef COMPILE_WPRINTF
/* 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. */
str = (char *) realloc (*strptr, strsize * 2);
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;
}
}
n = wcrtomb (!(flags & SUPPRESS) ? str : NULL, c, &state);
if (n == (size_t) -1)
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_WPRINTF
/* We have to emit the code to get into the intial
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. */
str = (char *) realloc (*strptr,
(str + n + 1) - *strptr);
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 = ((char *) *strptr) + strsize;
strsize = (str + n + 1) - *strptr;
}
}
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_WPRINTF
mbstate_t cstate;
#endif
/* Wide character string. */
STRING_ARG (wstr, wchar_t);
c = inchar ();
if (c == EOF)
input_error ();
#ifndef COMPILE_WPRINTF
memset (&cstate, '\0', sizeof (cstate));
#endif
do
{
if (ISSPACE (c))
{
ungetc (c, s);
break;
}
#ifdef COMPILE_WPRINTF
/* 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
+ 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[MB_LEN_MAX];
size_t cnt;
buf[0] = c;
cnt = 1;
while (1)
{
size_t n;
n = __mbrtowc (!(flags & SUPPRESS) ? wstr : NULL,
buf, cnt, &cstate);
if (n == (size_t) -2)
{
/* Possibly correct character, just not enough
input. */
assert (cnt < MB_CUR_MAX);
if (inchar () == EOF)
encode_error ();
buf[cnt++] = c;
continue;
}
if (n != cnt)
encode_error ();
/* We have a match. */
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 (c == EOF)
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;
/* Read the number into workspace. */
while (c != EOF && width != 0)
{
if (base == 16 ? !ISXDIGIT (c) :
((!ISDIGIT (c) || c - L_('0') >= base) &&
!((flags & GROUP) && base == 10 && c == thousands)))
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 (wpsize == 0 && read_pointer && (width < 0 || width >= 0)
&& c == '('
&& TOLOWER (inchar ()) == L_('n')
&& TOLOWER (inchar ()) == L_('i')
&& TOLOWER (inchar ()) == L_('l')
&& inchar () == L_(')'))
/* 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 (wp == tw)
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_('g'):
case L_('G'):
case L_('a'):
case L_('A'):
c = inchar ();
if (c == EOF)
input_error ();
/* Check for a sign. */
if (c == L_('-') || c == L_('+'))
{
negative = c == L_('-');
if (width == 0 || inchar () == EOF)
/* EOF is only an input error before we read any chars. */
conv_error ();
if (! ISDIGIT (c) && c != decimal)
{
/* This is no valid number. */
ungetc (c, s);
input_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 (width == 0 || inchar () == EOF || TOLOWER (c) != L_('a'))
input_error ();
if (width > 0)
--width;
ADDW (c);
if (width == 0 || inchar () == EOF || TOLOWER (c) != L_('n'))
input_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 (width == 0 || inchar () == EOF || TOLOWER (c) != L_('n'))
input_error ();
if (width > 0)
--width;
ADDW (c);
if (width == 0 || inchar () == EOF || TOLOWER (c) != L_('f'))
input_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 (width == 0 || inchar () == EOF
|| TOLOWER (c) != L_('n'))
input_error ();
if (width > 0)
--width;
ADDW (c);
if (width == 0 || inchar () == EOF
|| TOLOWER (c) != L_('i'))
input_error ();
if (width > 0)
--width;
ADDW (c);
if (width == 0 || inchar () == EOF
|| TOLOWER (c) != L_('t'))
input_error ();
if (width > 0)
--width;
ADDW (c);
if (width == 0 || inchar () == EOF
|| TOLOWER (c) != L_('y'))
input_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;
}
}
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 == L_('-') || c == L_('+')))
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 or no exponent this is an error. */
if (wpsize == 0 || (is_hexa && (wpsize == 2 || ! got_e)))
conv_error ();
scan_float:
/* Convert the number. */
ADDW (L_('\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 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_WPRINTF
/* 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 == ']' || *f == '-')
++f;
while ((fc = *f++) != L'\0' && fc != L']');
if (fc == L'\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)
{
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;
}
tw = (char *) f;
while ((fc = *f++) != '\0' && fc != ']')
if (fc == '-' && *f != '\0' && *f != ']' && f - 2 != tw
&& (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')
conv_error();
#endif
if (flags & LONG)
{
size_t now = read_in;
#ifdef COMPILE_WPRINTF
do
{
wchar_t *runp;
if (inchar () == WEOF)
break;
/* Test whether it's in the scanlist. */
runp = tw;
while (runp < wp)
{
if (runp[0] == L'-' && runp[1] != '\0' && runp[1] != ']'
&& 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 (wc == c)
break;
if (wc == runp[1] && !not_in)
break;
if (wc == runp[1] && not_in)
{
/* The current character is not in the
scanset. */
ungetwc (c, s);
goto out;
}
}
else
{
if (*runp == runp[1] && !not_in)
break;
if (*runp != runp[1] && not_in)
{
ungetwc (c ,s);
goto out;
}
}
++runp;
}
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
+ 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);
out:
#else
char buf[MB_LEN_MAX];
size_t cnt = 0;
mbstate_t cstate;
memset (&cstate, '\0', sizeof (cstate));
do
{
again:
if (inchar () == EOF)
break;
if (wp[c] == not_in)
{
ungetc (c, s);
break;
}
/* This is easy. */
if (!(flags & SUPPRESS))
{
size_t n;
/* Convert it into a wide character. */
n = __mbrtowc (wstr, buf, cnt, &cstate);
if (n == (size_t) -2)
{
/* Possibly correct character, just not enough
input. */
assert (cnt < MB_CUR_MAX);
goto again;
}
if (n != cnt)
encode_error ();
++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;
}
}
}
}
while (--width > 0);
if (cnt != 0)
/* We stopped in the middle of recognizing another
character. That's a problem. */
encode_error ();
#endif
if (now == read_in)
/* 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;
#ifdef COMPILE_WPRINTF
memset (&state, '\0', sizeof (state));
do
{
wchar_t *runp;
size_t n;
if (inchar () == WEOF)
break;
/* Test whether it's in the scanlist. */
runp = tw;
while (runp < wp)
{
if (runp[0] == L'-' && runp[1] != '\0' && runp[1] != ']'
&& 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 (wc == c)
break;
if (wc == runp[1] && !not_in)
break;
if (wc == runp[1] && not_in)
{
/* The current character is not in the
scanset. */
ungetwc (c, s);
goto out2;
}
}
else
{
if (*runp == runp[1] && !not_in)
break;
if (*runp != runp[1] && not_in)
{
ungetwc (c ,s);
goto out2;
}
}
++runp;
}
if (!(flags & SUPPRESS))
{
if ((flags & MALLOC)
&& str + MB_CUR_MAX >= *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. */
(*strptr)[strsize - 1] = '\0';
++done;
conv_error ();
}
else
{
*strptr = str;
str += strsize;
++strsize;
}
}
else
{
*strptr = str;
str += strsize;
strsize *= 2;
}
}
}
n = wcrtomb (!(flags & SUPPRESS) ? str : NULL, c, &state);
if (n == (size_t) -1)
encode_error ();
assert (n <= MB_CUR_MAX);
str += n;
}
while (--width > 0);
out2:
#else
do
{
if (inchar () == EOF)
break;
if (wp[c] == not_in)
{
ungetc (c, s);
break;
}
/* 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;
}
}
}
}
while (--width > 0);
#endif
if (now == read_in)
/* We haven't succesfully read any character. */
conv_error ();
if (!(flags & SUPPRESS))
{
#ifdef COMPILE_WPRINTF
/* We have to emit the code to get into the intial
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. */
str = (char *) realloc (*strptr,
(str + n + 1) - *strptr);
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 = ((char *) *strptr) + strsize;
strsize = (str + n + 1) - *strptr;
}
}
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);
}
/* Unlock stream. */
UNLOCK_STREAM (s);
return done;
}
#ifdef USE_IN_LIBIO
# ifdef COMPILE_WPRINTF
int
__vfwscanf (FILE *s, const wchar_t *format, va_list argptr)
{
return _IO_vfwscanf (s, format, argptr, NULL);
}
# else
int
__vfscanf (FILE *s, const char *format, va_list argptr)
{
return _IO_vfscanf (s, format, argptr, NULL);
}
# endif
#endif
#ifdef COMPILE_WPRINTF
weak_alias (__vfwscanf, vfwscanf)
#else
weak_alias (__vfscanf, vfscanf)
#endif
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