aa9bc17601
BMakefiles and other bits will follow. Requested by: Andrey Chernov Made world by: Chuck Robey
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/* mpq_canonicalize(op) -- Remove common factors of the denominator and
|
|
numerator in OP.
|
|
|
|
Copyright (C) 1991, 1994, 1995, 1996 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 Library General Public License as published by
|
|
the Free Software Foundation; either version 2 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 Library General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public License
|
|
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
|
|
MA 02111-1307, USA. */
|
|
|
|
#include "gmp.h"
|
|
#include "gmp-impl.h"
|
|
|
|
void
|
|
#if __STDC__
|
|
mpq_canonicalize (MP_RAT *op)
|
|
#else
|
|
mpq_canonicalize (op)
|
|
MP_RAT *op;
|
|
#endif
|
|
{
|
|
mpz_t gcd;
|
|
TMP_DECL (marker);
|
|
|
|
TMP_MARK (marker);
|
|
|
|
/* ??? Dunno if the 1+ is needed. */
|
|
MPZ_TMP_INIT (gcd, 1 + MAX (ABS (op->_mp_num._mp_size),
|
|
ABS (op->_mp_den._mp_size)));
|
|
|
|
mpz_gcd (gcd, &(op->_mp_num), &(op->_mp_den));
|
|
mpz_divexact (&(op->_mp_num), &(op->_mp_num), gcd);
|
|
mpz_divexact (&(op->_mp_den), &(op->_mp_den), gcd);
|
|
|
|
if (op->_mp_den._mp_size < 0)
|
|
{
|
|
op->_mp_num._mp_size = -op->_mp_num._mp_size;
|
|
op->_mp_den._mp_size = -op->_mp_den._mp_size;
|
|
}
|
|
TMP_FREE (marker);
|
|
}
|