/***********************************************************************
* *
* 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 a copy of table a with prefixes limited to a maximum of m bits
*/
Pt_t*
ptrebit(Pt_t* a, int m)
{
Pt_t* b;
Ptprefix_t* ap;
if (b = ptopen(a->disc))
for (ap = (Ptprefix_t*)dtfirst(a->dict); ap; ap = (Ptprefix_t*)dtnext(a->dict, ap))
if (!ptinsert(b, PTMIN(ap->min, m), PTMAX(ap->max, m)))
{
ptclose(b);
return 0;
}
return b;
}