acyclic.c File Reference

make directed graph acyclic, implements graphviz_acyclic, used in cmd/tools/acyclic.c More...

#include <cgraph/cghdr.h>
#include <stdbool.h>
#include <stddef.h>

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Data Structures
struct	Agnodeinfo_t

Macros
#define	ND_mark(n)   (((Agnodeinfo_t *)((n)->base.data))->mark)
#define	ND_onstack(n)   (((Agnodeinfo_t *)((n)->base.data))->onstack)
#define	graphName(g)   (agnameof(g))

Functions
static void	addRevEdge (Agraph_t *g, Agedge_t *e)
static bool	dfs (Agraph_t *g, Agnode_t *t, bool hasCycle, size_t *num_rev)
	Return true if the graph has a cycle.
bool	graphviz_acyclic (Agraph_t *g, const graphviz_acyclic_options_t *opts, size_t *num_rev)

Detailed Description

Copyright (c) 2011 AT&T Intellectual Property All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at https://www.eclipse.org/legal/epl-v10.html

Authors: Stephen North, Emden Gansner Contributors: Details at https://graphviz.org

Definition in file acyclic.c.

Macro Definition Documentation

graphName

#define graphName

(

g

)

(agnameof(g))

Definition at line 30 of file acyclic.c.

ND_mark

#define ND_mark

(

n

)

(((Agnodeinfo_t *)((n)->base.data))->mark)

Definition at line 28 of file acyclic.c.

ND_onstack

#define ND_onstack

(

n

)

(((Agnodeinfo_t *)((n)->base.data))->onstack)

Definition at line 29 of file acyclic.c.

Function Documentation

addRevEdge()

static void addRevEdge ( Agraph_t *  g, Agedge_t *  e  )

static

Definition at line 37 of file acyclic.c.

References agattr(), agcopyattr(), AGEDGE, agedge(), aghead, agnameof(), agsafeset(), agtail, agxget(), HEADPORT_ID, and TAILPORT_ID.

Referenced by dfs().

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dfs()

static bool dfs ( Agraph_t *  g, Agnode_t *  t, bool  hasCycle, size_t *  num_rev  )

static

Definition at line 52 of file acyclic.c.

References addRevEdge(), agdelete(), agedge(), agfstout(), aghead, agisstrict(), agnameof(), agnxtout(), agtail, dfs(), key, ND_mark, and ND_onstack.

Referenced by acyclic(), dfs(), dfs(), and graphviz_acyclic().

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