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