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/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.
All Rights Reserved
Copyright (c) 2000, BeOpen.com.
Copyright (c) 1995-2000, Corporation for National Research Initiatives.
Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
All rights reserved.
See the file "Misc/COPYRIGHT" for information on usage and
redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
******************************************************************/
/* Portable fmod(x, y) implementation for systems that don't have it */
#include "config.h"
#include "mymath.h"
#include <errno.h>
double
fmod(double x, double y)
{
double i, f;
if (y == 0.0) {
errno = EDOM;
return 0.0;
}
/* return f such that x = i*y + f for some integer i
such that |f| < |y| and f has the same sign as x */
i = floor(x/y);
f = x - i*y;
if ((x < 0.0) != (y < 0.0))
f = f-y;
return f;
}
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