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/* $Id: subg.c,v 1.1.1.1 2004/12/23 04:02:35 ellson Exp $ $Revision: 1.1.1.1 $ */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2004 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
#include <aghdr.h>
#ifdef DMALLOC
#include "dmalloc.h"
#endif
static Agraph_t *agfindsubg_by_id(Agraph_t * g, unsigned long id)
{
Agraph_t template;
agdtdisc(g, g->g_dict, &Ag_obj_id_disc);
AGID(&template) = id;
return (Agraph_t *) dtsearch(g->g_dict, &template);
}
static Agraph_t *localsubg(Agraph_t * g, unsigned long id)
{
Agraph_t *subg;
subg = agfindsubg_by_id(g, id);
if (subg)
return subg;
subg = agalloc(g, sizeof(Agraph_t));
subg->clos = g->clos;
subg->desc = g->desc;
subg->desc.maingraph = FALSE;
subg->desc.flatlock = FALSE;
subg->parent = g;
subg->root = g->root;
AGID(subg) = id;
return agopen1(subg);
}
Agraph_t *agidsubg(Agraph_t * g, unsigned long id, int cflag)
{
Agraph_t *subg;
subg = agfindsubg_by_id(g, id);
if ((subg == NILgraph) && cflag && agallocid(g, AGRAPH, id))
subg = localsubg(g, id);
return subg;
}
Agraph_t *agsubg(Agraph_t * g, char *name, int cflag)
{
unsigned long id;
Agraph_t *subg;
if (name && agmapnametoid(g, AGRAPH, name, &id, FALSE)) {
/* might already exist */
if ((subg = agfindsubg_by_id(g, id)))
return subg;
}
if (cflag && agmapnametoid(g, AGRAPH, name, &id, TRUE)) /* reserve id */
return localsubg(g, id);
return NILgraph;
}
Agraph_t *agfstsubg(Agraph_t * g)
{
return (Agraph_t *) dtfirst(g->g_dict);
}
Agraph_t *agnxtsubg(Agraph_t * subg)
{
Agraph_t *g;
g = agparent(subg);
return (Agraph_t *) dtnext(g->g_dict, subg);
}
Agraph_t *agparent(Agraph_t * g)
{
return g->parent;
}
Agraph_t *agroot(Agraph_t * g)
{
return g->root;
}
/* this function is only responsible for deleting the entry
* in the parent's subg dict. the rest is done in agclose().
*/
long agdelsubg(Agraph_t * g, Agraph_t * subg)
{
return (long) dtdelete(g->g_dict, subg);
}
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