math.c
1.26 KB
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/**
* \file
* Common reusable definitions.
*
* \todo All public symbols need to be prefixed to make name clashes
* more unlikely.
*
* \author Georg Hopp
*
* \copyright
* Copyright © 2014 Georg Hopp
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "tr/math.h"
long
TR_euklidGcd(register long val1, register long val2)
{
register long mod;
if(val2 > val1) SWAP_XOR(val1, val2);
mod = val1 % val2;
while (mod != 0) {
val1 = val2;
val2 = mod;
mod = val1 % val2;
}
return val2;
}
long
TR_lcm(register long val1, register long val2)
{
return val1 * val2 / TR_euklidGcd(val1, val2);
}
// vim: set ts=4 sw=4: