path: root/sorting.c

/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST


int
doublepcmp(const void *avp, const void *bvp)
{
	const double *ap = avp;
	const double *bp = bvp;
	return (*ap > *bp) - (*ap < *bp);
}


#else


int
main(void)
{
	double a, b;

	a = 1.0, b = 1.0;
	ASSERT(doublepcmp(&a, &b) == 0);
	ASSERT(doublepcmp(&b, &a) == -doublepcmp(&a, &b));

	a = -1.0, b = 1.0;
	ASSERT(doublepcmp(&a, &b) == -1);
	ASSERT(doublepcmp(&b, &a) == -doublepcmp(&a, &b));

	a = 1.0, b = -1.0;
	ASSERT(doublepcmp(&a, &b) == +1);
	ASSERT(doublepcmp(&b, &a) == -doublepcmp(&a, &b));

	a = 0.0, b = 0.0;
	ASSERT(doublepcmp(&a, &b) == 0);
	ASSERT(doublepcmp(&b, &a) == -doublepcmp(&a, &b));

	a = -1.0, b = 2.5;
	ASSERT(doublepcmp(&a, &b) == -1);
	ASSERT(doublepcmp(&b, &a) == -doublepcmp(&a, &b));

	a = 1.0, b = -2.5;
	ASSERT(doublepcmp(&a, &b) == +1);
	ASSERT(doublepcmp(&b, &a) == -doublepcmp(&a, &b));

	return 0;
}


#endif