1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/* $Id: subg.c,v 1.4 2009/06/03 01:10:51 ellson Exp $ $Revision: 1.4 $ */
/* 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 <cghdr.h>
static Agraph_t *agfindsubg_by_id(Agraph_t * g, unsigned long id)
{
Agraph_t template;
agdtdisc(g, g->g_dict, &Ag_subgraph_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->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;
}
/* 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);
}
|
