1  /* gmp_vsscanf -- formatted input from a string.
       2  
       3  Copyright 2001, 2002 Free Software Foundation, Inc.
       4  
       5  This file is part of the GNU MP Library.
       6  
       7  The GNU MP Library is free software; you can redistribute it and/or modify
       8  it under the terms of either:
       9  
      10    * the GNU Lesser General Public License as published by the Free
      11      Software Foundation; either version 3 of the License, or (at your
      12      option) any later version.
      13  
      14  or
      15  
      16    * the GNU General Public License as published by the Free Software
      17      Foundation; either version 2 of the License, or (at your option) any
      18      later version.
      19  
      20  or both in parallel, as here.
      21  
      22  The GNU MP Library is distributed in the hope that it will be useful, but
      23  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
      24  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      25  for more details.
      26  
      27  You should have received copies of the GNU General Public License and the
      28  GNU Lesser General Public License along with the GNU MP Library.  If not,
      29  see https://www.gnu.org/licenses/.  */
      30  
      31  #include <stdarg.h>
      32  
      33  #include <string.h>
      34  
      35  #include "gmp-impl.h"
      36  
      37  
      38  int
      39  gmp_vsscanf (const char *s, const char *fmt, va_list ap)
      40  {
      41  #if SSCANF_WRITABLE_INPUT
      42    /* We only actually need this if there's standard C types in fmt, and if
      43       "s" is not already writable, but it's too much trouble to check that,
      44       and in any case this writable sscanf input business is only for a few
      45       old systems. */
      46    size_t size;
      47    char   *alloc;
      48    int    ret;
      49    size = strlen (s) + 1;
      50    alloc = __GMP_ALLOCATE_FUNC_TYPE (size, char);
      51    memcpy (alloc, s, size);
      52    s = alloc;
      53    ret = __gmp_doscan (&__gmp_sscanf_funs, (void *) &s, fmt, ap);
      54    (*__gmp_free_func) (alloc, size);
      55    return ret;
      56  
      57  #else
      58    return __gmp_doscan (&__gmp_sscanf_funs, (void *) &s, fmt, ap);
      59  #endif
      60  }