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v0.5.1
Revision 5c1b22b093f6adf6113b0063a543988e2e28c005 authored by cvs2svn on 10 January 2002, 16:25:57 UTC, committed by cvs2svn on 10 January 2002, 16:25:57 UTC 
This commit was manufactured by cvs2svn to create tag 'r212c1'.
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fmod.c 

/* Portable fmod(x, y) implementation for systems that don't have it */

#include "config.h"

#include "pyport.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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