arb/mag/cmp.c
2016-04-26 17:20:05 +02:00

37 lines
860 B
C

/*
Copyright (C) 2014 Fredrik Johansson
This file is part of Arb.
Arb is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "mag.h"
int
mag_cmp(const mag_t x, const mag_t y)
{
int c;
if (mag_equal(x, y))
return 0;
if (mag_is_special(x) || mag_is_special(y))
{
if (mag_is_zero(x)) return -1;
if (mag_is_zero(y)) return 1;
if (mag_is_inf(x)) return 1;
if (mag_is_inf(y)) return -1;
}
c = fmpz_cmp(MAG_EXPREF(x), MAG_EXPREF(y));
if (c == 0)
return (MAG_MAN(x) < MAG_MAN(y)) ? -1 : 1;
return (c < 0) ? -1 : 1;
}