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vfscanf.c

/* Copyright (C) 1991-2006, 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>
#include <gnu/option-groups.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            0x0001      /* l: long or double */
#define LONGDBL         0x0002      /* L: long long or long double */
#define SHORT           0x0004      /* h: short */
#define SUPPRESS  0x0008      /* *: suppress assignment */
#define POINTER         0x0010      /* weird %p pointer (`fake hex') */
#define NOSKIP          0x0020      /* do not skip blanks */
#define NUMBER_SIGNED   0x0040      /* signed integer */
#define GROUP           0x0080      /* ': group numbers */
#define GNU_MALLOC      0x0100      /* a: malloc strings */
#define CHAR            0x0200      /* hh: char */
#define I18N            0x0400      /* I: use locale's digits */
#define HEXA_FLOAT      0x0800      /* hexadecimal float */
#define READ_POINTER    0x1000      /* this is a pointer value */
#define POSIX_MALLOC    0x2000      /* m: malloc strings */
#define MALLOC          (GNU_MALLOC | POSIX_MALLOC)

#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

#if __OPTION_POSIX_C_LANG_WIDE_CHAR
# define MULTIBYTE_SUPPORT (1)
#else
# define MULTIBYTE_SUPPORT (0)
#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 add_ptr_to_free(ptr)                                      \
  do                                                        \
    {                                                       \
      if (ptrs_to_free == NULL                                          \
        || ptrs_to_free->count == (sizeof (ptrs_to_free->ptrs)          \
                             / sizeof (ptrs_to_free->ptrs[0])))         \
      {                                                     \
        struct ptrs_to_free *new_ptrs = alloca (sizeof (*ptrs_to_free));    \
        new_ptrs->count = 0;                                      \
        new_ptrs->next = ptrs_to_free;                            \
        ptrs_to_free = new_ptrs;                                  \
      }                                                     \
      ptrs_to_free->ptrs[ptrs_to_free->count++] = (ptr);                \
    }                                                       \
  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)

struct ptrs_to_free
{
  size_t count;
  struct ptrs_to_free *next;
  char **ptrs[32];
};

/* 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;
  /* 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
  struct ptrs_to_free *ptrs_to_free = NULL;
  /* 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;
  /* 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 (CHAR_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);

 {
#if __OPTION_EGLIBC_LOCALE_CODE && !defined (COMPILE_WSCANF)
   struct locale_data *const curnumeric = loc->__locales[LC_NUMERIC];
#endif

#if __OPTION_EGLIBC_LOCALE_CODE
   /* 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
#else /* if ! __OPTION_EGLIBC_LOCALE_CODE */
   /* Hard-code values from the C locale.  */
# ifdef COMPILE_WSCANF
   decimal = L'.';
   thousands = L'\0';
# else
   decimal = ".";
   thousands = NULL;
# endif
#endif /* __OPTION_EGLIBC_LOCALE_CODE */
 }

  /* 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))
      {
          assert (MULTIBYTE_SUPPORT);

        /* 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;

      /* 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_('\''):
#ifdef COMPILE_WSCANF
          if (thousands != L'\0')
#else
          if (thousands != NULL)
#endif
            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;
          }
        /* In __isoc99_*scanf %as, %aS and %a[ extension is not
           supported at all.  */
        if (s->_flags2 & _IO_FLAGS2_SCANF_STD)
          {
            --f;
            break;
          }
        /* String conversions (%s, %[) take a `char **'
           arg and fill it in with a malloc'd pointer.  */
        flags |= GNU_MALLOC;
        break;
      case L_('m'):
        flags |= POSIX_MALLOC;
        if (*f == L_('l'))
          {
            ++f;
            flags |= LONG;
          }
        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;
        __set_errno (0);
        do
          /* We add the additional test for EOF here since otherwise
             inchar will restore the old errno value which might be
             EINTR but does not indicate an interrupt since nothing
             was read at this time.  */
          if (__builtin_expect ((c == EOF || inchar () == EOF)
                          && errno == EINTR, 0))
            input_error ();
        while (ISSPACE (c));
        __set_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 (width == -1)
            width = 1;

#define STRING_ARG(Str, Type, Width)                                    \
            do if (!(flags & SUPPRESS))                           \
            {                                               \
              if (flags & MALLOC)                                 \
                {                                           \
                  /* The string is to be stored in a malloc'd buffer.  */ \
                  /* For %mS using char ** is actually wrong, but       \
                   shouldn't make a difference on any arch glibc        \
                   supports and would unnecessarily complicate          \
                   things. */                               \
                  strptr = ARG (char **);                         \
                  if (strptr == NULL)                             \
                  conv_error ();                                  \
                  /* Allocate an initial buffer.  */              \
                  strsize = Width;                                \
                  *strptr = (char *) malloc (strsize * sizeof (Type));    \
                  Str = (Type *) *strptr;                         \
                  if (Str != NULL)                                \
                  add_ptr_to_free (strptr);                       \
                  else if (flags & POSIX_MALLOC)                        \
                  goto reteof;                                    \
                }                                           \
              else                                                \
                Str = ARG (Type *);                               \
              if (Str == NULL)                                    \
                conv_error ();                                    \
            } while (0)
#ifdef COMPILE_WSCANF
            STRING_ARG (str, char, 100);
#else
            STRING_ARG (str, char, (width > 1024 ? 1024 : width));
#endif

            c = inchar ();
            if (__builtin_expect (c == EOF, 0))
            input_error ();

#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;

              if (!(flags & SUPPRESS) && (flags & POSIX_MALLOC)
                  && str + MB_CUR_MAX >= *strptr + strsize)
                {
                  /* We have to enlarge the buffer if the `m' 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)
                      /* c can't have `a' flag, only `m'.  */
                      goto reteof;
                    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))
                /* 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
                {
                  if ((flags & MALLOC)
                    && (char *) str == *strptr + strsize)
                  {
                    /* Enlarge the buffer.  */
                    size_t newsize
                      = strsize
                        + (strsize >= width ? width - 1 : strsize);

                    str = (char *) realloc (*strptr, newsize);
                    if (str == NULL)
                      {
                        /* Can't allocate that much.  Last-ditch
                         effort.  */
                        str = (char *) realloc (*strptr, strsize + 1);
                        if (str == NULL)
                        /* c can't have `a' flag, only `m'.  */
                        goto reteof;
                        else
                        {
                          *strptr = (char *) str;
                          str += strsize;
                          ++strsize;
                        }
                      }
                    else
                      {
                        *strptr = (char *) str;
                        str += strsize;
                        strsize = newsize;
                      }
                  }
                  *str++ = c;
                }
              while (--width > 0 && inchar () != EOF);
            }
            else
            while (--width > 0 && inchar () != EOF);
#endif

            if (!(flags & SUPPRESS))
            {
              if ((flags & MALLOC) && str - *strptr != strsize)
                {
                  char *cp = (char *) realloc (*strptr, str - *strptr);
                  if (cp != NULL)
                  *strptr = cp;
                }
              strptr = NULL;
              ++done;
            }

            break;
          }
        /* FALLTHROUGH */
      case L_('C'):
          assert (MULTIBYTE_SUPPORT);

        if (width == -1)
          width = 1;

        STRING_ARG (wstr, wchar_t, (width > 1024 ? 1024 : width));

        c = inchar ();
        if (__builtin_expect (c == EOF, 0))
          input_error ();

#ifdef COMPILE_WSCANF
        /* Just store the incoming wide characters.  */
        if (!(flags & SUPPRESS))
          {
            do
            {
              if ((flags & MALLOC)
                  && wstr == (wchar_t *) *strptr + strsize)
                {
                  size_t newsize
                  = strsize + (strsize > width ? width - 1 : strsize);
                  /* Enlarge the buffer.  */
                  wstr = (wchar_t *) realloc (*strptr,
                                      newsize * 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)
                      /* C or lc can't have `a' flag, only `m' flag.  */
                      goto reteof;
                    else
                      {
                        *strptr = (char *) wstr;
                        wstr += strsize;
                        ++strsize;
                      }
                  }
                  else
                  {
                    *strptr = (char *) wstr;
                    wstr += strsize;
                    strsize = newsize;
                  }
                }
              *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;

            if (!(flags & SUPPRESS) && (flags & MALLOC)
                && wstr == (wchar_t *) *strptr + strsize)
              {
                size_t newsize
                  = strsize + (strsize > width ? width - 1 : strsize);
                /* Enlarge the buffer.  */
                wstr = (wchar_t *) realloc (*strptr,
                                    newsize * 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)
                    /* C or lc can't have `a' flag, only `m' flag.  */
                    goto reteof;
                  else
                    {
                      *strptr = (char *) wstr;
                      wstr += strsize;
                      ++strsize;
                    }
                  }
                else
                  {
                  *strptr = (char *) wstr;
                  wstr += strsize;
                  strsize = newsize;
                  }
              }

            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))
          {
            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;
            }
            strptr = NULL;

            ++done;
          }

        break;

      case L_('s'):           /* Read a string.  */
        if (!(flags & LONG))
          {
            STRING_ARG (str, char, 100);

            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' or `m'
                     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)
                        {
                        if (flags & POSIX_MALLOC)
                          goto reteof;
                        /* We lose.  Oh well.  Terminate the
                           string and stop converting,
                           so at least we don't skip any input.  */
                        ((char *) (*strptr))[strleng] = '\0';
                        strptr = NULL;
                        ++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)
                        {
                          if (flags & POSIX_MALLOC)
                            goto reteof;
                          /* We lose.  Oh well.  Terminate the
                             string and stop converting,
                             so at least we don't skip any input.  */
                          ((char *) (*strptr))[strsize - 1] = '\0';
                          strptr = NULL;
                          ++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)
                  {
                    if (flags & POSIX_MALLOC)
                      goto reteof;
                    /* We lose.  Oh well.  Terminate the string
                       and stop converting, so at least we don't
                       skip any input.  */
                    ((char *) (*strptr))[strleng] = '\0';
                    strptr = NULL;
                    ++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;
                }
              strptr = NULL;

              ++done;
            }
            break;
          }
        /* FALLTHROUGH */

      case L_('S'):
          assert (MULTIBYTE_SUPPORT);

        {
#ifndef COMPILE_WSCANF
          mbstate_t cstate;
#endif

          /* Wide character string.  */
          STRING_ARG (wstr, wchar_t, 100);

          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)
                        {
                        if (flags & POSIX_MALLOC)
                          goto reteof;
                        /* 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';
                        strptr = NULL;
                        ++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)
                      {
                        if (flags & POSIX_MALLOC)
                        goto reteof;
                        /* 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';
                        strptr = NULL;
                        ++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;
              }
            strptr = NULL;

            ++done;
            }
        }
        break;

      case L_('x'):     /* Hexadecimal integer.  */
      case L_('X'):     /* Ditto.  */
        base = 16;
        goto number;

      case L_('o'):     /* Octal integer.  */
        base = 8;
        goto number;

      case L_('u'):     /* Unsigned decimal integer.  */
        base = 10;
        goto number;

      case L_('d'):     /* Signed decimal integer.  */
        base = 10;
        flags |= NUMBER_SIGNED;
        goto number;

      case L_('i'):     /* Generic number.  */
        base = 0;
        flags |= NUMBER_SIGNED;

      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
#if __OPTION_EGLIBC_LOCALE_CODE
            /*  "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");
#else
              /* This will always be the case when
                 OPTION_EGLIBC_LOCALE_CODE is disabled, but the
                 compiler can't figure that out.  */
              wctrans_t map = NULL;
#endif
            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 (avail == 0 || 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 (avail == 0 || 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)
                {
                  /* 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 (avail == 0 || 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))
                  {
                  /* 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 (avail == 0 || 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
                            && (flags & 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 (flags & NUMBER_SIGNED)
            num.q = __strtoll_internal (wp, &tw, base, flags & GROUP);
            else
            num.uq = __strtoull_internal (wp, &tw, base, flags & GROUP);
          }
        else
          {
            if (flags & 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 (flags & NUMBER_SIGNED)
            {
              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;
            }
            else
            {
              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;
            }
            ++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 (width > 0)
          --width;
        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;
          }

        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);

              flags |= HEXA_FLOAT;
              exp_char = L_('p');

              /* Grouping is not allowed.  */
              flags &= ~GROUP;
              c = inchar ();
              if (width > 0)
                --width;
            }
          }

        while (1)
          {
            if (ISDIGIT (c))
            ADDW (c);
            else if (!got_e && (flags & HEXA_FLOAT) && 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 && ! 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 (avail == 0 || 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 && ! 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 (avail == 0 || 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 || inchar () == EOF)
            break;

            if (width > 0)
            --width;
          }

#if __OPTION_EGLIBC_LOCALE_CODE
        wctrans_t map;
        if (__builtin_expect ((flags & I18N) != 0, 0)
            /* Hexadecimal floats make no sense, fixing localized
             digits with ASCII letters.  */
            && !(flags & HEXA_FLOAT)
            /* Minimum requirement.  */
            && (wpsize == 0 || got_dot)
            && (map = __wctrans ("to_inpunct")) != NULL)
          {
            /* Reget the first character.  */
            inchar ();

            /* Localized digits, decimal points, and thousands
             separator.  */
            wint_t wcdigits[12];

            /* First get decimal equivalent to check if we read it
             or not.  */
            wcdigits[11] = __towctrans (L'.', map);

            /* If we have not read any character or have just read
               locale decimal point which matches the decimal point
               for localized FP numbers, then we may have localized
               digits.  Note, we test GOT_DOT above.  */
#ifdef COMPILE_WSCANF
            if (wpsize == 0 || (wpsize == 1 && wcdigits[11] == decimal))
#else
            char mbdigits[12][MB_LEN_MAX + 1];

            mbstate_t state;
            memset (&state, '\0', sizeof (state));

            bool match_so_far = wpsize == 0;
            size_t mblen = __wcrtomb (mbdigits[11], wcdigits[11], &state);
            if (mblen != (size_t) -1)
            {
              mbdigits[11][mblen] = '\0';
              match_so_far |= (wpsize == strlen (decimal)
                           && strcmp (decimal, mbdigits[11]) == 0);
            }
            else
            {
              size_t decimal_len = strlen (decimal);
              /* This should always be the case but the data comes
                 from a file.  */
              if (decimal_len <= MB_LEN_MAX)
                {
                  match_so_far |= wpsize == decimal_len;
                  memcpy (mbdigits[11], decimal, decimal_len + 1);
                }
              else
                match_so_far = false;
            }

            if (match_so_far)
#endif
            {
              bool have_locthousands = (flags & GROUP) != 0;

              /* Now get the digits and the thousands-sep equivalents.  */
                for (int n = 0; n < 11; ++n)
                {
                  if (n < 10)
                  wcdigits[n] = __towctrans (L'0' + n, map);
                  else if (n == 10)
                  {
                    wcdigits[10] = __towctrans (L',', map);
                    have_locthousands &= wcdigits[10] != L'\0';
                  }

#ifndef COMPILE_WSCANF
                  memset (&state, '\0', sizeof (state));

                  size_t mblen = __wcrtomb (mbdigits[n], wcdigits[n],
                                    &state);
                  if (mblen == (size_t) -1)
                  {
                    if (n == 10)
                      {
                        if (have_locthousands)
                        {
                          size_t thousands_len = strlen (thousands);
                          if (thousands_len <= MB_LEN_MAX)
                            memcpy (mbdigits[10], thousands,
                                  thousands_len + 1);
                          else
                            have_locthousands = false;
                        }
                      }
                    else
                      /* Ignore checking against localized digits.  */
                      goto no_i18nflt;
                  }
                  else
                  mbdigits[n][mblen] = '\0';
#endif
                }

              /* Start checking against localized digits, if
                 convertion is done correctly. */
              while (1)
                {
                  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
                  {
                    /* Check against localized digits, decimal point,
                       and thousands separator.  */
                    int n;
                    for (n = 0; n < 12; ++n)
                      {
#ifdef COMPILE_WSCANF
                        if (c == wcdigits[n])
                        {
                          if (n < 10)
                            ADDW (L_('0') + n);
                          else if (n == 11 && !got_dot)
                            {
                              ADDW (decimal);
                              got_dot = 1;
                            }
                          else if (n == 10 && have_locthousands
                                 && ! got_dot)
                            ADDW (thousands);
                          else
                            /* The last read character is not part
                               of the number anymore.  */
                            n = 12;

                          break;
                        }
#else
                        const char *cmpp = mbdigits[n];
                        int avail = width > 0 ? width : INT_MAX;

                        while ((unsigned char) *cmpp == c && avail >= 0)
                        if (*++cmpp == '\0')
                          break;
                        else
                          {
                            if (avail == 0 || inchar () == EOF)
                              break;
                            --avail;
                          }
                        if (*cmpp == '\0')
                        {
                          if (width > 0)
                            width = avail;

                          if (n < 10)
                            ADDW (L_('0') + n);
                          else if (n == 11 && !got_dot)
                            {
                              /* Add all the characters.  */
                              for (cmpp = decimal; *cmpp != '\0';
                                 ++cmpp)
                              ADDW ((unsigned char) *cmpp);

                              got_dot = 1;
                            }
                          else if (n == 10 && (flags & GROUP) != 0
                                 && ! got_dot)
                            {
                              /* Add all the characters.  */
                              for (cmpp = thousands; *cmpp != '\0';
                                 ++cmpp)
                              ADDW ((unsigned char) *cmpp);
                            }
                          else
                            /* The last read character is not part
                               of the number anymore.  */
                              n = 12;

                          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;
                        }
#endif
                      }

                    if (n >= 12)
                      {
                        /* The last read character is not part
                         of the number anymore.  */
                        ungetc (c, s);
                        break;
                      }
                  }

                  if (width == 0 || inchar () == EOF)
                  break;

                  if (width > 0)
                  --width;
                }
            }

#ifndef COMPILE_WSCANF
          no_i18nflt:
            ;
#endif
          }
#endif /* __OPTION_EGLIBC_LOCALE_CODE */

        /* 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 (__builtin_expect (wpsize == 0
                        || ((flags & HEXA_FLOAT) && wpsize == 2), 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)
            {
              assert (MULTIBYTE_SUPPORT);
              STRING_ARG (wstr, wchar_t, 100);
            }
        else
          STRING_ARG (str, char, 100);

        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 ();
        wchar_t *twend = (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;
              assert (MULTIBYTE_SUPPORT);
#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 < twend)
                {
                  if (runp[0] == L'-' && runp[1] != '\0'
                    && runp + 1 != twend
                    && 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 == twend && !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)
                        {
                          if (flags & POSIX_MALLOC)
                            goto reteof;
                          /* 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';
                          strptr = NULL;
                          ++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)
                        {
                          if (flags & POSIX_MALLOC)
                            goto reteof;
                          /* 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';
                          strptr = NULL;
                          ++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;
                }
              strptr = NULL;

              ++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 < twend)
                {
                  if (runp[0] == L'-' && runp[1] != '\0'
                    && runp + 1 != twend
                    && 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 == twend && !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)
                        {
                          if (flags & POSIX_MALLOC)
                            goto reteof;
                          /* We lose.  Oh well.  Terminate the string
                             and stop converting, so at least we don't
                             skip any input.  */
                          ((char *) (*strptr))[strleng] = '\0';
                          strptr = NULL;
                          ++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;
                        }
                        if (flags & POSIX_MALLOC)
                        goto reteof;
                        /* We lose.  Oh well.  Terminate the
                         string and stop converting,
                         so at least we don't skip any input.  */
                        ((char *) (*strptr))[strsize - 1] = '\0';
                        strptr = NULL;
                        ++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)
                  {
                    if (flags & POSIX_MALLOC)
                      goto reteof;
                    /* We lose.  Oh well.  Terminate the string
                       and stop converting, so at least we don't
                       skip any input.  */
                    ((char *) (*strptr))[strleng] = '\0';
                    strptr = NULL;
                    ++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;
                }
              strptr = NULL;

              ++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;
        flags |= READ_POINTER;
        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;

  if (done == EOF)
    {
  reteof:
      if (__builtin_expect (ptrs_to_free != NULL, 0))
      {
        struct ptrs_to_free *p = ptrs_to_free;
        while (p != NULL)
          {
            for (size_t cnt = 0; cnt < p->count; ++cnt)
            {
              free (*p->ptrs[cnt]);
              *p->ptrs[cnt] = NULL;
            }
            p = p->next;
            ptrs_to_free = p;
          }
      }
      return EOF;
    }
  else if (__builtin_expect (strptr != NULL, 0))
    {
      free (*strptr);
      *strptr = NULL;
    }
  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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