| /* mpq_set_si(dest,ulong_num,ulong_den) -- Set DEST to the retional number |
| ULONG_NUM/ULONG_DEN. |
| |
| Copyright 1991, 1994, 1995, 2001, 2003 Free Software Foundation, Inc. |
| |
| This file is part of the GNU MP Library. |
| |
| The GNU MP Library is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or (at your |
| option) any later version. |
| |
| The GNU MP Library is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ |
| |
| #include "gmp.h" |
| #include "gmp-impl.h" |
| |
| void |
| mpq_set_si (MP_RAT *dest, signed long int num, unsigned long int den) |
| { |
| unsigned long int abs_num; |
| |
| if (GMP_NUMB_BITS < BITS_PER_ULONG) |
| { |
| if (num == 0) /* Canonicalize 0/d to 0/1. */ |
| den = 1; |
| mpz_set_si (mpq_numref (dest), num); |
| mpz_set_ui (mpq_denref (dest), den); |
| return; |
| } |
| |
| abs_num = ABS (num); |
| |
| if (num == 0) |
| { |
| /* Canonicalize 0/d to 0/1. */ |
| den = 1; |
| dest->_mp_num._mp_size = 0; |
| } |
| else |
| { |
| dest->_mp_num._mp_d[0] = abs_num; |
| dest->_mp_num._mp_size = num > 0 ? 1 : -1; |
| } |
| |
| dest->_mp_den._mp_d[0] = den; |
| dest->_mp_den._mp_size = (den != 0); |
| } |