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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2010 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* dtopen() with handle placed in specific vm region
*/
#include <dt.h>
typedef struct Dc_s
{
Dtdisc_t ndisc;
Dtdisc_t* odisc;
Vmalloc_t* vm;
} Dc_t;
static int
eventf(Dt_t* dt, int op, void* data, Dtdisc_t* disc)
{
Dc_t* dc = (Dc_t*)disc;
int r;
if (dc->odisc->eventf && (r = (*dc->odisc->eventf)(dt, op, data, dc->odisc)))
return r;
return op == DT_ENDOPEN ? 1 : 0;
}
static void*
memoryf(Dt_t* dt, void* addr, size_t size, Dtdisc_t* disc)
{
return vmresize(((Dc_t*)disc)->vm, addr, size, VM_RSMOVE);
}
/*
* open a dictionary using disc->memoryf if set or vm otherwise
*/
Dt_t*
dtnew(Vmalloc_t* vm, Dtdisc_t* disc, Dtmethod_t* meth)
{
Dt_t* dt;
Dc_t dc;
dc.odisc = disc;
dc.ndisc = *disc;
dc.ndisc.eventf = eventf;
if (!dc.ndisc.memoryf)
dc.ndisc.memoryf = memoryf;
dc.vm = vm;
if (dt = dtopen(&dc.ndisc, meth))
dtdisc(dt, disc, DT_SAMECMP|DT_SAMEHASH);
return dt;
}
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