graphs

Collaboration diagram for graphs:

Modules
	callbacks
	virtual methods of initialization, modification, and finalization of graph objects
	subgraphs

Files
file	graph.c
file	write.c
	implements agwrite, agcanon, agstrcanon, and agcanonStr

Data Structures
struct	Agdesc_s
	graph descriptor More...
struct	Agdstate_s
	client state (closures) More...
struct	Agclos_s
	shared resources for Agraph_s More...
struct	Agraph_s
	graph or subgraph More...
struct	Agraphinfo_t

Macros
#define	GD_parent(g)   (((Agraphinfo_t*)AGDATA(g))->parent)
#define	GD_level(g)   (((Agraphinfo_t*)AGDATA(g))->level)
#define	GD_drawing(g)   (((Agraphinfo_t*)AGDATA(g))->drawing)
#define	GD_bb(g)   (((Agraphinfo_t*)AGDATA(g))->bb)
#define	GD_gvc(g)   (((Agraphinfo_t*)AGDATA(g))->gvc)
#define	GD_cleanup(g)   (((Agraphinfo_t*)AGDATA(g))->cleanup)
#define	GD_dist(g)   (((Agraphinfo_t*)AGDATA(g))->dist)
#define	GD_alg(g)   (((Agraphinfo_t*)AGDATA(g))->alg)
#define	GD_border(g)   (((Agraphinfo_t*)AGDATA(g))->border)
#define	GD_clust(g)   (((Agraphinfo_t*)AGDATA(g))->clust)
#define	GD_dotroot(g)   (((Agraphinfo_t*)AGDATA(g))->dotroot)
#define	GD_comp(g)   (((Agraphinfo_t*)AGDATA(g))->comp)
#define	GD_exact_ranksep(g)   (((Agraphinfo_t*)AGDATA(g))->exact_ranksep)
#define	GD_expanded(g)   (((Agraphinfo_t*)AGDATA(g))->expanded)
#define	GD_flags(g)   (((Agraphinfo_t*)AGDATA(g))->flags)
#define	GD_gui_state(g)   (((Agraphinfo_t*)AGDATA(g))->gui_state)
#define	GD_charset(g)   (((Agraphinfo_t*)AGDATA(g))->charset)
#define	GD_has_labels(g)   (((Agraphinfo_t*)AGDATA(g))->has_labels)
#define	GD_has_images(g)   (((Agraphinfo_t*)AGDATA(g))->has_images)
#define	GD_has_flat_edges(g)   (((Agraphinfo_t*)AGDATA(g))->has_flat_edges)
#define	GD_ht1(g)   (((Agraphinfo_t*)AGDATA(g))->ht1)
#define	GD_ht2(g)   (((Agraphinfo_t*)AGDATA(g))->ht2)
#define	GD_installed(g)   (((Agraphinfo_t*)AGDATA(g))->installed)
#define	GD_label(g)   (((Agraphinfo_t*)AGDATA(g))->label)
#define	GD_leader(g)   (((Agraphinfo_t*)AGDATA(g))->leader)
#define	GD_rankdir2(g)   (((Agraphinfo_t*)AGDATA(g))->rankdir)
#define	GD_rankdir(g)   (((Agraphinfo_t*)AGDATA(g))->rankdir & 0x3)
#define	GD_flip(g)   (GD_rankdir(g) & 1)
#define	GD_realrankdir(g)   ((((Agraphinfo_t*)AGDATA(g))->rankdir) >> 2)
#define	GD_realflip(g)   (GD_realrankdir(g) & 1)
#define	GD_ln(g)   (((Agraphinfo_t*)AGDATA(g))->ln)
#define	GD_maxrank(g)   (((Agraphinfo_t*)AGDATA(g))->maxrank)
#define	GD_maxset(g)   (((Agraphinfo_t*)AGDATA(g))->maxset)
#define	GD_minrank(g)   (((Agraphinfo_t*)AGDATA(g))->minrank)
#define	GD_minset(g)   (((Agraphinfo_t*)AGDATA(g))->minset)
#define	GD_minrep(g)   (((Agraphinfo_t*)AGDATA(g))->minrep)
#define	GD_maxrep(g)   (((Agraphinfo_t*)AGDATA(g))->maxrep)
#define	GD_move(g)   (((Agraphinfo_t*)AGDATA(g))->move)
#define	GD_n_cluster(g)   (((Agraphinfo_t*)AGDATA(g))->n_cluster)
#define	GD_ndim(g)   (((Agraphinfo_t*)AGDATA(g))->ndim)
#define	GD_odim(g)   (((Agraphinfo_t*)AGDATA(g))->odim)
#define	GD_neato_nlist(g)   (((Agraphinfo_t*)AGDATA(g))->neato_nlist)
#define	GD_nlist(g)   (((Agraphinfo_t*)AGDATA(g))->nlist)
#define	GD_nodesep(g)   (((Agraphinfo_t*)AGDATA(g))->nodesep)
#define	GD_rank(g)   (((Agraphinfo_t*)AGDATA(g))->rank)
#define	GD_rankleader(g)   (((Agraphinfo_t*)AGDATA(g))->rankleader)
#define	GD_ranksep(g)   (((Agraphinfo_t*)AGDATA(g))->ranksep)
#define	GD_rn(g)   (((Agraphinfo_t*)AGDATA(g))->rn)
#define	GD_set_type(g)   (((Agraphinfo_t*)AGDATA(g))->set_type)
#define	GD_label_pos(g)   (((Agraphinfo_t*)AGDATA(g))->label_pos)
#define	GD_showboxes(g)   (((Agraphinfo_t*)AGDATA(g))->showboxes)
#define	GD_fontnames(g)   (((Agraphinfo_t*)AGDATA(g))->fontnames)
#define	GD_spring(g)   (((Agraphinfo_t*)AGDATA(g))->spring)
#define	GD_sum_t(g)   (((Agraphinfo_t*)AGDATA(g))->sum_t)
#define	GD_t(g)   (((Agraphinfo_t*)AGDATA(g))->t)
#define	agfindgraphattr(g, a)   (agattr(g,AGRAPH,a,NULL))

Typedefs
typedef struct Agraph_s	Agraph_t
	graph, subgraph (or hyperedge)
typedef struct Agdesc_s	Agdesc_t
	graph descriptor
typedef struct Agdstate_s	Agdstate_t
	client state (closures)
typedef struct Agclos_s	Agclos_t
	common fields for graph/subgs
typedef void(*	agobjfn_t) (Agraph_t *g, Agobj_t *obj, void *arg)
typedef void(*	agobjupdfn_t) (Agraph_t *g, Agobj_t *obj, void *arg, Agsym_t *sym)
typedef struct Agraphinfo_t	Agraphinfo_t

Functions
Agraph_t *	agopen (char *name, Agdesc_t desc, Agdisc_t *disc)
	creates a new graph with the given name and kind
int	agclose (Agraph_t *g)
	deletes a graph, freeing its associated storage
Agraph_t *	agread (void *chan, Agdisc_t *disc)
	constructs a new graph
Agraph_t *	agmemread (const char *cp)
	reads a graph from the input string
Agraph_t *	agmemconcat (Agraph_t *g, const char *cp)
void	agsetfile (const char *)
	sets the current file name for subsequent error reporting
Agraph_t *	agconcat (Agraph_t *g, void *chan, Agdisc_t *disc)
	merges the file contents with a pre-existing graph
int	agwrite (Agraph_t *g, void *chan)
	Return 0 on success, EOF on failure.
int	agisdirected (Agraph_t *g)
int	agisundirected (Agraph_t *g)
int	agisstrict (Agraph_t *g)
int	agissimple (Agraph_t *g)

Variables
Agdesc_t	Agdirected
	directed
Agdesc_t	Agstrictdirected
	strict directed. A strict graph cannot have multi-edges or self-arcs.
Agdesc_t	Agundirected
	undirected
Agdesc_t	Agstrictundirected
	strict undirected

Detailed Description

The functions agisdirected, agisundirected, agisstrict, and agissimple can be used to query if a graph is directed, undirected, strict (at most one edge with a given tail and head), or simple (strict with no loops), respectively.

Macro Definition Documentation

agfindgraphattr

#define agfindgraphattr	(		g,
			a
	)		(agattr(g,AGRAPH,a,NULL))

Definition at line 613 of file types.h.

GD_alg

#define GD_alg

(

g

)

(((Agraphinfo_t*)AGDATA(g))->alg)

Definition at line 358 of file types.h.

GD_bb

#define GD_bb

(

g

)

(((Agraphinfo_t*)AGDATA(g))->bb)

Definition at line 354 of file types.h.

GD_border

#define GD_border

(

g

)

(((Agraphinfo_t*)AGDATA(g))->border)

Definition at line 359 of file types.h.

GD_charset

#define GD_charset

(

g

)

(((Agraphinfo_t*)AGDATA(g))->charset)

Definition at line 367 of file types.h.

GD_cleanup

#define GD_cleanup

(

g

)

(((Agraphinfo_t*)AGDATA(g))->cleanup)

Definition at line 356 of file types.h.

GD_clust

#define GD_clust

(

g

)

(((Agraphinfo_t*)AGDATA(g))->clust)

Definition at line 360 of file types.h.

GD_comp

#define GD_comp

(

g

)

(((Agraphinfo_t*)AGDATA(g))->comp)

Definition at line 362 of file types.h.

GD_dist

#define GD_dist

(

g

)

(((Agraphinfo_t*)AGDATA(g))->dist)

Definition at line 357 of file types.h.

GD_dotroot

#define GD_dotroot

(

g

)

(((Agraphinfo_t*)AGDATA(g))->dotroot)

Definition at line 361 of file types.h.

GD_drawing

#define GD_drawing

(

g

)

(((Agraphinfo_t*)AGDATA(g))->drawing)

Definition at line 353 of file types.h.

GD_exact_ranksep

#define GD_exact_ranksep

(

g

)

(((Agraphinfo_t*)AGDATA(g))->exact_ranksep)

Definition at line 363 of file types.h.

GD_expanded

#define GD_expanded

(

g

)

(((Agraphinfo_t*)AGDATA(g))->expanded)

Definition at line 364 of file types.h.

GD_flags

#define GD_flags

(

g

)

(((Agraphinfo_t*)AGDATA(g))->flags)

Definition at line 365 of file types.h.

GD_flip

#define GD_flip

(

g

)

(GD_rankdir(g) & 1)

Definition at line 378 of file types.h.

GD_fontnames

#define GD_fontnames

(

g

)

(((Agraphinfo_t*)AGDATA(g))->fontnames)

Definition at line 402 of file types.h.

GD_gui_state

#define GD_gui_state

(

g

)

(((Agraphinfo_t*)AGDATA(g))->gui_state)

Definition at line 366 of file types.h.

GD_gvc

#define GD_gvc

(

g

)

(((Agraphinfo_t*)AGDATA(g))->gvc)

Definition at line 355 of file types.h.

GD_has_flat_edges

#define GD_has_flat_edges

(

g

)

(((Agraphinfo_t*)AGDATA(g))->has_flat_edges)

Definition at line 370 of file types.h.

GD_has_images

#define GD_has_images

(

g

)

(((Agraphinfo_t*)AGDATA(g))->has_images)

Definition at line 369 of file types.h.

GD_has_labels

#define GD_has_labels

(

g

)

(((Agraphinfo_t*)AGDATA(g))->has_labels)

Definition at line 368 of file types.h.

GD_ht1

#define GD_ht1

(

g

)

(((Agraphinfo_t*)AGDATA(g))->ht1)

Definition at line 371 of file types.h.

GD_ht2

#define GD_ht2

(

g

)

(((Agraphinfo_t*)AGDATA(g))->ht2)

Definition at line 372 of file types.h.

GD_installed

#define GD_installed

(

g

)

(((Agraphinfo_t*)AGDATA(g))->installed)

Definition at line 373 of file types.h.

GD_label

#define GD_label

(

g

)

(((Agraphinfo_t*)AGDATA(g))->label)

Definition at line 374 of file types.h.

GD_label_pos

#define GD_label_pos

(

g

)

(((Agraphinfo_t*)AGDATA(g))->label_pos)

Definition at line 400 of file types.h.

GD_leader

#define GD_leader

(

g

)

(((Agraphinfo_t*)AGDATA(g))->leader)

Definition at line 375 of file types.h.

GD_level

#define GD_level

(

g

)

(((Agraphinfo_t*)AGDATA(g))->level)

Definition at line 352 of file types.h.

GD_ln

#define GD_ln

(

g

)

(((Agraphinfo_t*)AGDATA(g))->ln)

Definition at line 381 of file types.h.

GD_maxrank

#define GD_maxrank

(

g

)

(((Agraphinfo_t*)AGDATA(g))->maxrank)

Definition at line 382 of file types.h.

GD_maxrep

#define GD_maxrep

(

g

)

(((Agraphinfo_t*)AGDATA(g))->maxrep)

Definition at line 387 of file types.h.

GD_maxset

#define GD_maxset

(

g

)

(((Agraphinfo_t*)AGDATA(g))->maxset)

Definition at line 383 of file types.h.

GD_minrank

#define GD_minrank

(

g

)

(((Agraphinfo_t*)AGDATA(g))->minrank)

Definition at line 384 of file types.h.

GD_minrep

#define GD_minrep

(

g

)

(((Agraphinfo_t*)AGDATA(g))->minrep)

Definition at line 386 of file types.h.

GD_minset

#define GD_minset

(

g

)

(((Agraphinfo_t*)AGDATA(g))->minset)

Definition at line 385 of file types.h.

GD_move

#define GD_move

(

g

)

(((Agraphinfo_t*)AGDATA(g))->move)

Definition at line 388 of file types.h.

GD_n_cluster

#define GD_n_cluster

(

g

)

(((Agraphinfo_t*)AGDATA(g))->n_cluster)

Definition at line 389 of file types.h.

GD_ndim

#define GD_ndim

(

g

)

(((Agraphinfo_t*)AGDATA(g))->ndim)

Definition at line 390 of file types.h.

GD_neato_nlist

#define GD_neato_nlist

(

g

)

(((Agraphinfo_t*)AGDATA(g))->neato_nlist)

Definition at line 392 of file types.h.

GD_nlist

#define GD_nlist

(

g

)

(((Agraphinfo_t*)AGDATA(g))->nlist)

Definition at line 393 of file types.h.

GD_nodesep

#define GD_nodesep

(

g

)

(((Agraphinfo_t*)AGDATA(g))->nodesep)

Definition at line 394 of file types.h.

GD_odim

#define GD_odim

(

g

)

(((Agraphinfo_t*)AGDATA(g))->odim)

Definition at line 391 of file types.h.

GD_parent

#define GD_parent

(

g

)

(((Agraphinfo_t*)AGDATA(g))->parent)

Definition at line 351 of file types.h.

GD_rank

#define GD_rank

(

g

)

(((Agraphinfo_t*)AGDATA(g))->rank)

Definition at line 395 of file types.h.

GD_rankdir

#define GD_rankdir

(

g

)

(((Agraphinfo_t*)AGDATA(g))->rankdir & 0x3)

Definition at line 377 of file types.h.

GD_rankdir2

#define GD_rankdir2

(

g

)

(((Agraphinfo_t*)AGDATA(g))->rankdir)

Definition at line 376 of file types.h.

GD_rankleader

#define GD_rankleader

(

g

)

(((Agraphinfo_t*)AGDATA(g))->rankleader)

Definition at line 396 of file types.h.

GD_ranksep

#define GD_ranksep

(

g

)

(((Agraphinfo_t*)AGDATA(g))->ranksep)

Definition at line 397 of file types.h.

GD_realflip

#define GD_realflip

(

g

)

(GD_realrankdir(g) & 1)

Definition at line 380 of file types.h.

GD_realrankdir

#define GD_realrankdir

(

g

)

((((Agraphinfo_t*)AGDATA(g))->rankdir) >> 2)

Definition at line 379 of file types.h.

GD_rn

#define GD_rn

(

g

)

(((Agraphinfo_t*)AGDATA(g))->rn)

Definition at line 398 of file types.h.

GD_set_type

#define GD_set_type

(

g

)

(((Agraphinfo_t*)AGDATA(g))->set_type)

Definition at line 399 of file types.h.

GD_showboxes

#define GD_showboxes

(

g

)

(((Agraphinfo_t*)AGDATA(g))->showboxes)

Definition at line 401 of file types.h.

GD_spring

#define GD_spring

(

g

)

(((Agraphinfo_t*)AGDATA(g))->spring)

Definition at line 403 of file types.h.

GD_sum_t

#define GD_sum_t

(

g

)

(((Agraphinfo_t*)AGDATA(g))->sum_t)

Definition at line 404 of file types.h.

GD_t

#define GD_t

(

g

)

(((Agraphinfo_t*)AGDATA(g))->t)

Definition at line 405 of file types.h.

Typedef Documentation

Agclos_t

typedef struct Agclos_s Agclos_t

Definition at line 82 of file cgraph.h.

Agdesc_t

typedef struct Agdesc_s Agdesc_t

Definition at line 80 of file cgraph.h.

Agdstate_t

typedef struct Agdstate_s Agdstate_t

Definition at line 81 of file cgraph.h.

agobjfn_t

typedef void(* agobjfn_t) (Agraph_t *g, Agobj_t *obj, void *arg)

Definition at line 369 of file cgraph.h.

agobjupdfn_t

typedef void(* agobjupdfn_t) (Agraph_t *g, Agobj_t *obj, void *arg, Agsym_t *sym)

Definition at line 370 of file cgraph.h.

Agraph_t

typedef struct Agraph_s Agraph_t

Definition at line 79 of file cgraph.h.

Agraphinfo_t

typedef struct Agraphinfo_t Agraphinfo_t

Function Documentation

agclose()

int agclose

(

Agraph_t *

g

)

Definition at line 102 of file graph.c.

References AGCLOS, agclose(), agdelnode(), agdelsubg(), AGDISC, agdtclose(), agfreeid(), agfstnode(), agfstsubg(), AGID, aginternalmapclose(), agmethod_delete(), agnxtnode(), agnxtsubg(), agparent(), agpopdisc(), AGRAPH, agraphattr_delete(), agrecclose(), agstrclose(), Agclos_s::cb, Agraph_s::clos, Agraph_s::desc, dtsize(), Agraph_s::e_id, Agraph_s::e_seq, Agcbstack_s::f, FAILURE, free(), Agraph_s::g_id, Agraph_s::g_seq, g_seq2(), Agdesc_s::has_attrs, Agraph_s::n_id, Agraph_s::n_seq, node_set_free(), node_set_is_empty(), and SUCCESS.

Referenced by agclose(), agdelete(), cccomps(), checkLabelOrder(), chkClose(), cleanupCloneGraph(), clear_viewport(), closeDerivedGraph(), closeGraph(), deleteGraph(), deleteObj(), dot2_rank(), freeDerivedGraph(), gvevent_read(), layout_block(), loadGraph(), lockGraph(), main(), main(), main(), mkConstraintG(), process(), process(), processClusterEdges(), processClusters(), remove_pair_edges(), rm(), run_gvpr(), and undoClusterEdges().

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agconcat()

Agraph_t * agconcat	(	Agraph_t *	g,
		void *	chan,
		Agdisc_t *	disc
	)

Though I/O methods may be overridden, the default is that the channel argument is a stdio FILE pointer. In that case, if any of the streams are wide-oriented, the behavior is undefined.

Definition at line 2280 of file grammar.c.

References aagin, aagparse(), Ag_G_global, AgDefaultDisc, aglexbad(), aglexinit(), Disc, disc, G, G, and NULL.

Referenced by agmemread0(), agread(), and agread().

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agisdirected()

int agisdirected

(

Agraph_t *

g

)

Definition at line 190 of file graph.c.

References Agraph_s::desc, and Agdesc_s::directed.

Referenced by agisundirected(), arrow_flags(), cloneGraph(), edgecmd_internal(), emit_edge(), getval(), graph_init(), gv_to_gml(), gvToolTred(), initState(), lookup(), main(), main(), make_flat_adj_edges(), make_label(), multicolor(), nameOf(), nameOf(), strdup_and_subst_obj0(), taperfun(), tcldot_layout(), write_edge(), and write_hdr().

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agissimple()

int agissimple

(

Agraph_t *

g

)

Definition at line 205 of file graph.c.

References Agraph_s::desc, Agdesc_s::no_loop, and Agdesc_s::strict.

agisstrict()

int agisstrict

(

Agraph_t *

g

)

Definition at line 200 of file graph.c.

References Agraph_s::desc, and Agdesc_s::strict.

Referenced by agedge(), dfs(), getval(), lookup(), ok_to_make_edge(), readGraphs(), write_hdr(), write_hdr(), and writeHdr().

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agisundirected()

int agisundirected

(

Agraph_t *

g

)

Definition at line 195 of file graph.c.

References agisdirected().

Referenced by agedge(), and agidedge().

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agmemconcat()

Agraph_t * agmemconcat	(	Agraph_t *	g,
		const char *	cp
	)

Definition at line 102 of file io.c.

References agmemread0().

Referenced by graph_init().

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agmemread()

Agraph_t * agmemread

(

const char *

cp

)

Definition at line 97 of file io.c.

References agmemread0().

Referenced by readstring().

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agopen()

Agraph_t * agopen	(	char *	name,
		Agdesc_t	desc,
		Agdisc_t *	disc
	)

Parameters

desc	- graph kind, can be Agdirected, Agundirected, Agstrictdirected or Agstrictundirected. A strict graph cannot have multi-edges or self-arcs.
disc	- discipline structure which can be used to tailor I/O, memory allocation, and ID allocation. Typically, a NULL value will be used to indicate the default discipline AgDefaultDisc.

Definition at line 44 of file graph.c.

References agclos(), AGID, agmapnametoid(), agopen1(), AGRAPH, agregister(), AGTYPE, Agraph_s::clos, Agraph_s::desc, Agclos_s::disc, gv_calloc(), Agdisc_s::id, Agdstate_s::id, Agdesc_s::maingraph, Agiddisc_s::open, Agraph_s::root, and Agclos_s::state.

Referenced by agattr(), checkLabelOrder(), circomps(), clone_graph(), cloneGraph(), cloneGraph(), deriveGraph(), deriveGraph(), digraph(), dot2_rank(), dotnew_internal(), graph(), gvplugin_graph(), main(), main(), makeDotGraph(), mkConstraintG(), mkGraph(), mkGraph(), mkNConstraintG(), openG(), process(), process(), startgraph(), startgraph(), strictdigraph(), and strictgraph().

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agread()

Agraph_t * agread	(	void *	chan,
		Agdisc_t *	disc
	)

Definition at line 2292 of file grammar.c.

References agconcat(), disc, and NULL.

Referenced by agmemread0(), dflt_read(), dotread(), dotstring(), gvevent_read(), gvNextInputGraph(), init_viewport(), loadGraph(), main(), main(), read(), read(), and readG().

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agsetfile()

void agsetfile

(

const char *

f

)

Definition at line 2415 of file scan.c.

References InputFile, InputFile, line_num, and line_num.

Referenced by agmemread0(), gvNextInputGraph(), and nextFile().

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agwrite()

int agwrite	(	Agraph_t *	g,
		void *	chan
	)

Definition at line 730 of file write.c.

References AGDISC, agget(), CHKRV, gv_isdigit(), len(), Level, MAX_OUTPUTLINE, Max_outputline, MIN_OUTPUTLINE, NULL, set_attrwf(), write_body(), write_hdr(), and write_trl().

Referenced by clarify(), create_save_subgraph_from_filter(), dot_end_graph(), export_dot(), graphviz_acyclic(), graphviz_tred(), gwrite(), gwrite(), main(), main(), main(), plot_dot_map(), process(), save_graph_with_file_name(), sfioWrite(), visit(), write(), and write().

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Variable Documentation

Agdirected

Agdesc_t Agdirected

extern

Definition at line 284 of file graph.c.

Referenced by cloneGraph(), digraph(), dotnew_internal(), gvplugin_graph(), main(), main(), makeDotGraph(), mkGraph(), mkGraph(), process(), and xargs().

Agstrictdirected

Agdesc_t Agstrictdirected

extern

Definition at line 285 of file graph.c.

Referenced by checkLabelOrder(), deriveGraph(), dot2_rank(), dotnew_internal(), mkConstraintG(), mkNConstraintG(), and strictdigraph().

Agstrictundirected

Agdesc_t Agstrictundirected

extern

Definition at line 287 of file graph.c.

Referenced by circomps(), deriveGraph(), dotnew_internal(), process(), and strictgraph().

Agundirected

Agdesc_t Agundirected

extern

Definition at line 286 of file graph.c.

Referenced by cloneGraph(), dotnew_internal(), graph(), makeDotGraph(), mkGraph(), and mkGraph().