1 /* mpq_set_str -- string to mpq conversion. 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 the GNU Lesser General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or (at your 10 option) any later version. 11 12 The GNU MP Library is distributed in the hope that it will be useful, but 13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15 License for more details. 16 17 You should have received a copy of the GNU Lesser General Public License 18 along 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 30 int 31 mpq_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