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