1/* mpq_set_str -- string to mpq conversion.
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 <stdio.h>
21#include <string.h>
22#include "gmp.h"
23#include "gmp-impl.h"
24
25
26/* FIXME: Would like an mpz_set_mem (or similar) accepting a pointer and
27   length so we wouldn't have to copy the numerator just to null-terminate
28   it.  */
29
30int
31mpq_set_str (mpq_ptr q, const char *str, int base)
32{
33  const char  *slash;
34  char        *num;
35  size_t      numlen;
36  int         ret;
37
38  slash = strchr (str, '/');
39  if (slash == NULL)
40    {
41      q->_mp_den._mp_size = 1;
42      q->_mp_den._mp_d[0] = 1;
43
44      return mpz_set_str (mpq_numref(q), str, base);
45    }
46
47  numlen = slash - str;
48  num = __GMP_ALLOCATE_FUNC_TYPE (numlen+1, char);
49  memcpy (num, str, numlen);
50  num[numlen] = '\0';
51  ret = mpz_set_str (mpq_numref(q), num, base);
52  (*__gmp_free_func) (num, numlen+1);
53
54  if (ret != 0)
55    return ret;
56
57  return mpz_set_str (mpq_denref(q), slash+1, base);
58}
59