/*
 * Copyright (c) 1995 Landon Curt Noll
 * Permission is granted to use, distribute, or modify this source,
 * provided that this copyright notice remains intact.
 *
 * By:	Landon Curt Noll
 *	http://reality.sgi.com/chongo/
 *
 *	chongo <was here> /\../\
 *
 * This library is used by the 2300 series of the regress.cal test suite.
 */


obj matrix {m}


/*
 * matrix_inc - increment the matrix inside the object
 */
define matrix_inc(a)
{
	local i;

	/* increment each matrix member */
	for (i= 0; i < size(a.m); i++)
		++a.m[[i]];
	return a;
}

/*
 * matrix_dec - decrement the matrix inside the object
 */
define matrix_dec(a)
{
	local i;

	/* decrement each matrix member */
	for (i= 0; i < size(a.m); i++)
		--a.m[[i]];
	return a;
}

/*
 * mkmat - load the matrix inside the object
 */
define mkmat()
{
	local s, M, i, v;

	/* firewall */
	s = param(0);
	if (s == 0)
		quit "Need at least one argument";

	/* create the matrix */
	mat M[s];

	/* load the matrix with the args */
	for (i = 0; i < s; i++)
		M[i] = param(i + 1);

	/* create the object with the matrix */
	obj matrix v;
	v.m = M;
	return v;
}

/*
 * ckmat - check if the matrix inside an object has a set of given values
 */
define ckmat()
{
	local s, a, i;

	/* firewall */
	s = param(0);
	if (s < 2)
		quit "Need at least two arguments";

	/* get the object to test */
	a = param(1);

	/* verify the matrix in the object is the right size */
	if (size(a.m) != s-1) {
		return 0;
	}

	/* check each matrix element with the args passed */
	for (i = 2; i <= s; i++) {
		if (a.m[i-2] != param(i)) {
			/* args do not match */
			return 0;
		}
	}

	/* args match the matrix in the object */
	return 1;
}