/*
 * infinities - handle infinities symbolically, a little helper file
 *
 * Copyright (C) 2013 Christoph Zurnieden
 *
 * Calc is open software; you can redistribute it and/or modify it under
 * the terms of the version 2.1 of the GNU Lesser General Public License
 * as published by the Free Software Foundation.
 *
 * Calc is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General
 * Public License for more details.
 *
 * A copy of version 2.1 of the GNU Lesser General Public License is
 * distributed with calc under the filename COPYING-LGPL.  You should have
 * received a copy with calc; if not, write to Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */


static resource_debug_level;
resource_debug_level = config("resource_debug", 0);


define isinfinite(x)
{
    if (isstr(x)) {
	if (strncmp(x, "cinf", 4) == 0
	    || strncmp(x, "pinf", 4) == 0 || strncmp(x, "ninf", 4) == 0)
	    return 1;
    }
    return 0;
}

define iscinf(x)
{
    if (isstr(x)) {
	if (strncmp(x, "cinf", 4) == 0)
	    return 1;
    }
    return 0;
}

define ispinf(x)
{
    if (isstr(x)) {
	if (strncmp(x, "pinf", 4) == 0)
	    return 1;
    }
    return 0;
}

define isninf(x)
{
    if (isstr(x)) {
	if (strncmp(x, "ninf", 4) == 0)
	    return 1;
    }
    return 0;
}

define cinf()
{
    return "cinf";
}

define ninf()
{
    return "ninf";
}

define pinf()
{
    return "pinf";
}


config("resource_debug", resource_debug_level),;
if (config("resource_debug") & 3) {
    print "isinfinite(x)";
    print "iscinf(x)";
    print "ispinf(x)";
    print "isninf(x)";
    print "cinf()";
    print "ninf()";
    print "pinf()";
}