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Reorganizing source code. Created util dir

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2012-10-20 10:19:38 -07:00
parent 630ba0c675
commit 2c464d413d
153 changed files with 0 additions and 0 deletions
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52
lib/ext_gcd.h
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@ -1,52 +0,0 @@
/*++
Copyright (c) 2006 Microsoft Corporation
Module Name:
ext_gcd.h
Abstract:
<abstract>
Author:
Leonardo de Moura (leonardo) 2007-06-09.
Revision History:
--*/
#ifndef _EXT_GCD_H_
#define _EXT_GCD_H_
template<typename numeral>
void extended_gcd(const numeral & in_a, const numeral & in_b, numeral & gcd, numeral & x, numeral & y) {
numeral a = in_a;
numeral b = in_b;
x = numeral(0);
y = numeral(1);
numeral lastx(1);
numeral lasty(0);
numeral tmp;
numeral quotient;
while (!b.is_zero()) {
tmp = b;
quotient = div(a, b);
b = mod(a, b);
a = tmp;
tmp = x;
x = lastx - (quotient * x);
lastx = tmp;
tmp = y;
y = lasty - (quotient * y);
lasty = tmp;
}
gcd = a;
x = lastx;
y = lasty;
}
#endif /* _EXT_GCD_H_ */