view Python/fmod.c @ 17503:327efb59dbcd legacy-trunk

I am TENTATIVELY checking in Martin von Loewis's patch for the SSL problem reported by Neil Schemenauer on python-dev on 4/12/01, wth subject "Problem with SSL and socketmodule on Debian Potato?". It's tentative because Moshe objected, but Martin rebutted, and Moshe seems unavailable for comments. (Note that with OpenSSL 0.9.6a, I get a lot of compilation warnings for socketmodule.c -- I'm assuming I can safely ignore these until 2.1 is released.)
author Guido van Rossum <guido@python.org>
date Fri, 13 Apr 2001 17:54:04 +0000
parents 6f6f965c5e2d
children 2dea40e40d9d
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/* 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;
}