gcc/gmp/scanf/vsscanf.c

/* gmp_vsscanf -- formatted input from a string.

Copyright 2001, 2002 Free Software Foundation, Inc.

This file is part of the GNU MP Library.

The GNU MP 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 3 of the License, or (at your
option) any later version.

The GNU MP 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 MP Library.  If not, see http://www.gnu.org/licenses/.  */

#include "config.h"

#if HAVE_STDARG
#include <stdarg.h>
#else
#include <varargs.h>
#endif

#include <string.h>

#include "gmp.h"
#include "gmp-impl.h"


int
gmp_vsscanf (const char *s, const char *fmt, va_list ap)
{
#if SSCANF_WRITABLE_INPUT
  /* We only actually need this if there's standard C types in fmt, and if
     "s" is not already writable, but it's too much trouble to check that,
     and in any case this writable sscanf input business is only for a few
     old systems. */
  size_t size;
  char   *alloc;
  int    ret;
  size = strlen (s) + 1;
  alloc = (char *) (*__gmp_allocate_func) (size);
  memcpy (alloc, s, size);
  s = alloc;
  ret = __gmp_doscan (&__gmp_sscanf_funs, (void *) &s, fmt, ap);
  (*__gmp_free_func) (alloc, size);
  return ret;

#else
  return __gmp_doscan (&__gmp_sscanf_funs, (void *) &s, fmt, ap);
#endif
}