/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 2000-2011 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
#include "ptlib.h"
/*
* return non-zero if table a is a subset of table b
*/
int
ptsubset(Pt_t* a, Pt_t* b)
{
Ptprefix_t* ap;
Ptprefix_t* bp;
ap = (Ptprefix_t*)dtfirst(a->dict);
bp = (Ptprefix_t*)dtfirst(b->dict);
while (ap)
{
if (!bp || ap->max < bp->min || ap->min < bp->min)
return 0;
if (ap->max < bp->max)
ap = (Ptprefix_t*)dtnext(a->dict, ap);
else if (ap->max > bp->max)
bp = (Ptprefix_t*)dtnext(b->dict, bp);
else
{
ap = (Ptprefix_t*)dtnext(a->dict, ap);
bp = (Ptprefix_t*)dtnext(b->dict, bp);
}
}
return 1;
}