/***********************************************************************
* *
* 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 "ptvlib.h"
/*
* return a copy of table a with prefixes limited to a maximum of m bits
*/
Ptv_t*
ptvrebit(Ptv_t* a, int m)
{
Ptv_t* b;
Ptvprefix_t* ap;
if (b = ptvopen(a->disc, a->size))
for (ap = (Ptvprefix_t*)dtfirst(a->dict); ap; ap = (Ptvprefix_t*)dtnext(a->dict, ap))
if (!ptvinsert(b, ptvmin(a->size, b->r[0], ap->min, m), ptvmin(a->size, b->r[1], ap->max, m)))
{
ptvclose(b);
return 0;
}
return b;
}