1/* mpq_set_ui(dest,ulong_num,ulong_den) -- Set DEST to the rational number 2 ULONG_NUM/ULONG_DEN. 3 4Copyright 1991, 1994, 1995, 2001, 2002, 2003 Free Software Foundation, Inc. 5 6This file is part of the GNU MP Library. 7 8The GNU MP Library is free software; you can redistribute it and/or modify 9it under the terms of the GNU Lesser General Public License as published by 10the Free Software Foundation; either version 3 of the License, or (at your 11option) any later version. 12 13The GNU MP Library is distributed in the hope that it will be useful, but 14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16License for more details. 17 18You should have received a copy of the GNU Lesser General Public License 19along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ 20 21#include "gmp.h" 22#include "gmp-impl.h" 23 24void 25mpq_set_ui (MP_RAT *dest, unsigned long int num, unsigned long int den) 26{ 27 if (GMP_NUMB_BITS < BITS_PER_ULONG) 28 { 29 if (num == 0) /* Canonicalize 0/d to 0/1. */ 30 den = 1; 31 mpz_set_ui (mpq_numref (dest), num); 32 mpz_set_ui (mpq_denref (dest), den); 33 return; 34 } 35 36 if (num == 0) 37 { 38 /* Canonicalize 0/n to 0/1. */ 39 den = 1; 40 dest->_mp_num._mp_size = 0; 41 } 42 else 43 { 44 dest->_mp_num._mp_d[0] = num; 45 dest->_mp_num._mp_size = 1; 46 } 47 48 dest->_mp_den._mp_d[0] = den; 49 dest->_mp_den._mp_size = (den != 0); 50} 51