60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*=============================================================================
|
|
|
|
This file is part of FLINT.
|
|
|
|
FLINT is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
FLINT 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with FLINT; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
=============================================================================*/
|
|
/******************************************************************************
|
|
|
|
Copyright (C) 2011 Fredrik Johansson
|
|
|
|
******************************************************************************/
|
|
|
|
#include <gmp.h>
|
|
#include "flint.h"
|
|
#include "fmpz.h"
|
|
|
|
void
|
|
fmpz_lcm(fmpz_t f, const fmpz_t g, const fmpz_t h)
|
|
{
|
|
fmpz_t t;
|
|
|
|
if (fmpz_is_zero(g) || fmpz_is_zero(h))
|
|
{
|
|
fmpz_zero(f);
|
|
return;
|
|
}
|
|
|
|
if (fmpz_is_pm1(g))
|
|
{
|
|
fmpz_abs(f, h);
|
|
return;
|
|
}
|
|
|
|
if (fmpz_is_pm1(h))
|
|
{
|
|
fmpz_abs(f, g);
|
|
return;
|
|
}
|
|
|
|
fmpz_init(t);
|
|
fmpz_gcd(t, g, h);
|
|
fmpz_divexact(t, g, t);
|
|
fmpz_mul(f, t, h);
|
|
fmpz_abs(f, f);
|
|
fmpz_clear(t);
|
|
}
|