Graphviz: lib/dotgen/rank.c File Reference

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#include <dotgen/dot.h>
#include <limits.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
#include <util/alloc.h>
#include <util/list.h>
#include <util/gv_math.h>

Include dependency graph for rank.c:

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Macros
#define	BACKWARD_PENALTY 1000

#define	STRONG_CLUSTER_WEIGHT 1000

#define	NORANK 6

#define	ROOT "\177root"

#define	TOPNODE "\177top"

#define	BOTNODE "\177bot"

#define	ND_comp(n) ND_hops(n)

Functions
static void	dot1_rank (graph_t *g)

static void	dot2_rank (graph_t *g)

static void	renewlist (elist L, edge_set_t track)

static int	edge_ptr_cmp (const edge_t a, const edge_t b)

static void	cleanup1 (graph_t *g)

static void	edgelabel_ranks (graph_t *g)

static void	collapse_rankset (graph_t g, graph_t subg, int kind)

static int	rank_set_class (graph_t *g)

static int	make_new_cluster (graph_t g, graph_t subg)

static void	node_induce (graph_t par, graph_t g)

void	dot_scan_ranks (graph_t *g)

static void	cluster_leader (graph_t *clust)

static void	collapse_cluster (graph_t g, graph_t subg)

static void	collapse_sets (graph_t rg, graph_t g)

static void	find_clusters (graph_t *g)

static void	set_minmax (graph_t *g)

static point	minmax_edges (graph_t *g)

static int	minmax_edges2 (graph_t *g, point slen)

void	rank1 (graph_t *g)

static void	expand_ranksets (graph_t *g)

void	dot_rank (graph_t *g)

bool	is_cluster (graph_t *g)

static void	set_parent (graph_t g, graph_t p)

static bool	is_empty (graph_t *g)

static bool	is_a_strong_cluster (graph_t *g)

static int	rankset_kind (graph_t *g)

static bool	is_nonconstraint (edge_t *e)

static node_t *	find (node_t *n)

static node_t *	union_one (node_t leader, node_t n)

static node_t *	union_all (graph_t *g)

static void	compile_samerank (graph_t ug, graph_t parent_clust)

static graph_t *	dot_lca (graph_t c0, graph_t c1)

static bool	is_internal_to_cluster (edge_t *e)

static node_t *	makeXnode (graph_t G, char name)

static void	compile_nodes (graph_t g, graph_t Xg)

static void	merge (edge_t *e, int minlen, int weight)

static void	strong (graph_t g, node_t t, node_t h, edge_t orig)

static void	weak (graph_t g, node_t t, node_t h, edge_t orig)

static void	compile_edges (graph_t ug, graph_t Xg)

static void	compile_clusters (graph_t g, graph_t Xg, node_t top, node_t bot)

static void	reverse_edge2 (graph_t g, edge_t e)

static void	dfs (graph_t g, node_t v)

static void	break_cycles (graph_t *g)

static void	setMinMax (graph_t *g, int doRoot)

static void	readout_levels (graph_t g, graph_t Xg, int ncc)

static void	dfscc (graph_t g, node_t n, int cc)

static int	connect_components (graph_t *g)

static void	add_fast_edges (graph_t *g)

static void	my_init_graph (Agraph_t g, Agobj_t graph, void *arg)

static void	my_init_node (Agraph_t g, Agobj_t node, void *arg)

static void	my_init_edge (Agraph_t g, Agobj_t edge, void *arg)

Variables
static node_t *	Last_node

static Agcbdisc_t	mydisc = { {my_init_graph,0,0}, {my_init_node,0,0}, {my_init_edge,0,0} }

int	infosizes []

Macro Definition Documentation

◆ BACKWARD_PENALTY

#define BACKWARD_PENALTY 1000

Definition at line 539 of file rank.c.

◆ BOTNODE

#define BOTNODE "\177bot"

Definition at line 544 of file rank.c.

◆ ND_comp

#define ND_comp ( n ) ND_hops(n)

Definition at line 549 of file rank.c.

◆ NORANK

#define NORANK 6

Definition at line 541 of file rank.c.

◆ ROOT

#define ROOT "\177root"

Definition at line 542 of file rank.c.

◆ STRONG_CLUSTER_WEIGHT

#define STRONG_CLUSTER_WEIGHT 1000

Definition at line 540 of file rank.c.

◆ TOPNODE

#define TOPNODE "\177top"

Definition at line 543 of file rank.c.

Function Documentation

◆ add_fast_edges()

static void add_fast_edges ( graph_t * g )

static

Definition at line 1047 of file rank.c.

References agfstnode(), agfstout(), aghead, agnxtnode(), agnxtout(), elist_append, ND_in, and ND_out.

Referenced by dot2_rank().

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◆ break_cycles()

static void break_cycles ( graph_t * g )

static

Definition at line 907 of file rank.c.

References agfstnode(), agnxtnode(), dfs(), ND_mark, and ND_onstack.

Referenced by dot2_rank().

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◆ cleanup1()

static void cleanup1 ( graph_t * g )

static

Definition at line 76 of file rank.c.

References agfstnode(), agfstout(), agnxtnode(), agnxtout(), Agedge_s::base, Agobj_s::data, ED_to_orig, ED_to_virt, edge_ptr_cmp(), free(), free_list, GD_comp, GD_nlist, ND_in, ND_mark, ND_next, ND_node_type, ND_out, ND_prev, NULL, prev, renewlist(), and SLACKNODE.

Referenced by conjugate_gradient_f(), and dot1_rank().

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◆ cluster_leader()

static void cluster_leader ( graph_t * clust )

static

Definition at line 292 of file rank.c.

References agfstnode(), agnxtnode(), CLUSTER, GD_leader, GD_nlist, ND_next, ND_node_type, ND_rank, ND_ranktype, ND_UF_size, NORMAL, NULL, and UF_union().

Referenced by collapse_cluster().

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◆ collapse_cluster()

static void collapse_cluster	(	graph_t *	g,
		graph_t *	subg
	)

static

Definition at line 323 of file rank.c.

References agfstnode(), CL_type, cluster_leader(), dot1_rank(), dot_scan_ranks(), GD_parent, LOCAL, make_new_cluster(), node_induce(), and NULL.

Referenced by collapse_sets(), and find_clusters().

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◆ collapse_rankset()

static void collapse_rankset	(	graph_t *	g,
		graph_t *	subg,
		int	kind
	)

static

Definition at line 175 of file rank.c.

References agfstnode(), agnxtnode(), GD_maxset, GD_minset, MAXRANK, MINRANK, ND_ranktype, NULL, SINKRANK, SOURCERANK, and UF_union().

Referenced by collapse_sets().

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◆ collapse_sets()

static void collapse_sets	(	graph_t *	rg,
		graph_t *	g
	)

static

Definition at line 342 of file rank.c.

References agfstsubg(), agnxtsubg(), CL_type, CLUSTER, collapse_cluster(), collapse_rankset(), collapse_sets(), LOCAL, and rank_set_class().

Referenced by collapse_sets(), and dot1_rank().

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◆ compile_clusters()

static void compile_clusters	(	graph_t *	g,
		graph_t *	Xg,
		node_t *	top,
		node_t *	bot
	)

static

Definition at line 845 of file rank.c.

References agedge(), agfstin(), agfstnode(), agfstout(), agfstsubg(), agnxtnode(), agnxtsubg(), BOTNODE, compile_clusters(), find(), is_a_cluster(), is_a_strong_cluster(), makeXnode(), merge(), ND_rep, STRONG_CLUSTER_WEIGHT, sub, top(), and TOPNODE.

Referenced by compile_clusters(), and dot2_rank().

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◆ compile_edges()

static void compile_edges	(	graph_t *	ug,
		graph_t *	Xg
	)

static

Definition at line 804 of file rank.c.

References agfstnode(), agfstout(), aghead, agnxtnode(), agnxtout(), agtail, find(), GD_maxrep, GD_minrep, is_a_strong_cluster(), is_internal_to_cluster(), is_nonconstraint(), ND_clust, ND_rep, NULL, strong(), and weak().

Referenced by dot2_rank().

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◆ compile_nodes()

static void compile_nodes	(	graph_t *	g,
		graph_t *	Xg
	)

static

Definition at line 745 of file rank.c.

References agfstnode(), agnameof(), agnxtnode(), find(), Last_node, makeXnode(), ND_rep, and NULL.

Referenced by dot2_rank().

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◆ compile_samerank()

static void compile_samerank	(	graph_t *	ug,
		graph_t *	parent_clust
	)

static

Definition at line 630 of file rank.c.

References agfstnode(), agfstsubg(), agget(), agnameof(), agnxtnode(), agnxtsubg(), agwarningf(), compile_samerank(), GD_level, GD_maxrep, GD_minrep, is_a_cluster(), is_empty(), MAXRANK, MINRANK, ND_clust, NORANK, NULL, rankset_kind(), SAMERANK, set_parent(), SINKRANK, SOURCERANK, union_all(), and union_one().

Referenced by compile_samerank(), and dot2_rank().

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◆ connect_components()

static int connect_components ( graph_t * g )

static

Definition at line 1024 of file rank.c.

References agedge(), agfstnode(), agnxtnode(), dfscc(), makeXnode(), ND_comp, and ROOT.

Referenced by dot2_rank().

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◆ dfs()

static void dfs	(	graph_t *	g,
		node_t *	v
	)

static

Definition at line 885 of file rank.c.

References agfstout(), aghead, agnxtout(), dfs(), ND_mark, ND_onstack, and reverse_edge2().

Referenced by break_cycles(), and dfs().

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◆ dfscc()

static void dfscc	(	graph_t *	g,
		node_t *	n,
		int	cc
	)

static

Definition at line 1012 of file rank.c.

References agfstin(), agfstout(), aghead, agnxtin(), agnxtout(), agtail, dfscc(), and ND_comp.

Referenced by connect_components(), and dfscc().

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◆ dot1_rank()

static void dot1_rank ( graph_t * g )

static

Definition at line 498 of file rank.c.

References acyclic(), class1(), cleanup1(), collapse_sets(), decompose(), edgelabel_ranks(), expand_ranksets(), minmax_edges(), minmax_edges2(), and rank1().

Referenced by collapse_cluster(), and dot_rank().

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◆ dot2_rank()

void dot2_rank ( graph_t * g )

static

Definition at line 1073 of file rank.c.

References add_fast_edges(), agbindrec(), agclose(), agget(), agnedges(), agnnodes(), agopen(), agpushdisc(), Agstrictdirected, break_cycles(), compile_clusters(), compile_edges(), compile_nodes(), compile_samerank(), connect_components(), edgelabel_ranks(), infosizes, Last_node, mydisc, NULL, rank2(), readout_levels(), and scale_clamp().

Referenced by dot_rank().

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◆ dot_lca()

static graph_t * dot_lca	(	graph_t *	c0,
		graph_t *	c1
	)

static

Definition at line 702 of file rank.c.

References GD_level, and GD_parent.

Referenced by is_internal_to_cluster().

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◆ dot_rank()

void dot_rank ( graph_t * g )

Definition at line 517 of file rank.c.

References agget(), dot1_rank(), dot2_rank(), GD_flags, GD_maxrank, GD_minrank, mapbool(), NEW_RANK, and Verbose.

Referenced by dotLayout(), and make_flat_adj_edges().

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◆ dot_scan_ranks()

void dot_scan_ranks ( graph_t * g )

Definition at line 271 of file rank.c.

References agfstnode(), agnxtnode(), GD_leader, GD_maxrank, GD_minrank, ND_rank, and NULL.

Referenced by collapse_cluster(), and rebuild_vlists().

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◆ edge_ptr_cmp()

static int edge_ptr_cmp	(	const edge_t **	a,
		const edge_t **	b
	)

static

compare two edge pointers

This function assumes the two edge pointers may have differing provenance, and thus cannot be directly compared. It also assumes the caller is primarily comparing in order to put equal elements next to each other in a sorting operation. Relying on, e.g. an earlier allocated edge pointer to compare as less than a later allocated edge pointer is not a good idea.

Parameters

a	One edge
b	Another edge

Returns: A comparator value suitable for sorting algorithms

Definition at line 63 of file rank.c.

Referenced by cleanup1().

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◆ edgelabel_ranks()

static void edgelabel_ranks ( graph_t * g )

static

Definition at line 160 of file rank.c.

References agfstnode(), agfstout(), agnxtnode(), agnxtout(), ED_minlen, EDGE_LABEL, GD_has_labels, and GD_ranksep.

Referenced by dot1_rank(), and dot2_rank().

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◆ expand_ranksets()

static void expand_ranksets ( graph_t * g )

static

Definition at line 461 of file rank.c.

References agfstnode(), agnxtnode(), CL_type, dot_root(), find_clusters(), GD_clust, GD_maxrank, GD_minrank, GD_n_cluster, LEAFSET, LOCAL, ND_rank, ND_ranktype, set_minmax(), UF_find(), and UF_singleton().

Referenced by dot1_rank().

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◆ find()

static node_t * find ( node_t * n )

static

Definition at line 598 of file rank.c.

References find(), and ND_set.

Referenced by compile_clusters(), compile_edges(), compile_nodes(), find(), readout_levels(), union_all(), and union_one().

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◆ find_clusters()

static void find_clusters ( graph_t * g )

static

Definition at line 361 of file rank.c.

References agfstsubg(), agnxtsubg(), CLUSTER, collapse_cluster(), dot_root(), and GD_set_type.

Referenced by expand_ranksets().

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◆ is_a_strong_cluster()

static bool is_a_strong_cluster ( graph_t * g )

static

Definition at line 562 of file rank.c.

References agget(), mapbool(), and str.

Referenced by compile_clusters(), and compile_edges().

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◆ is_cluster()

bool is_cluster ( graph_t * g )

Definition at line 528 of file rank.c.

References is_a_cluster().

Referenced by ordered_edges(), and rank_set_class().

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◆ is_empty()

static bool is_empty ( graph_t * g )

static

Definition at line 558 of file rank.c.

References agfstnode().

Referenced by compile_samerank().

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◆ is_internal_to_cluster()

static bool is_internal_to_cluster ( edge_t * e )

static

Definition at line 713 of file rank.c.

References aghead, agtail, dot_lca(), and ND_clust.

Referenced by compile_edges().

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◆ is_nonconstraint()

static bool is_nonconstraint ( edge_t * e )

static

Definition at line 587 of file rank.c.

References agxget(), constr, E_constr, and mapbool().

Referenced by compile_edges().

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◆ make_new_cluster()

static int make_new_cluster	(	graph_t *	g,
		graph_t *	subg
	)

static

Definition at line 229 of file rank.c.

References do_graph_label(), GD_clust, GD_n_cluster, and gv_recalloc().

Referenced by collapse_cluster(), and set_parent().

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◆ makeXnode()

static node_t * makeXnode	(	graph_t *	G,
		char *	name
	)

static

Definition at line 727 of file rank.c.

References agnode(), alloc_elist, G, GD_nlist, Last_node, ND_in, ND_next, ND_out, ND_prev, and NULL.

Referenced by compile_clusters(), compile_nodes(), connect_components(), and weak().

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◆ merge()

static void merge	(	edge_t *	e,
		int	minlen,
		int	weight
	)

static

Definition at line 761 of file rank.c.

References ED_minlen, ED_weight, and MAX.

Referenced by beginpath(), compile_clusters(), endpath(), reverse_edge2(), and strong().

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◆ minmax_edges()

static point minmax_edges ( graph_t * g )

static

Definition at line 385 of file rank.c.

References aghead, agtail, GD_maxset, GD_minset, ND_in, ND_out, ND_ranktype, NULL, reverse_edge(), SINKRANK, SOURCERANK, UF_find(), point::x, and point::y.

Referenced by dot1_rank().

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◆ minmax_edges2()

static int minmax_edges2	(	graph_t *	g,
		point	slen
	)

static

Definition at line 417 of file rank.c.

References agfstnode(), agnxtnode(), ED_minlen, ED_weight, GD_maxset, GD_minset, ND_in, ND_out, NULL, UF_find(), virtual_edge(), point::x, and point::y.

Referenced by dot1_rank().

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◆ my_init_edge()

static void my_init_edge	(	Agraph_t *	g,
		Agobj_t *	edge,
		void *	arg
	)

static

Definition at line 1063 of file rank.c.

References agbindrec(), and edge.

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◆ my_init_graph()

static void my_init_graph	(	Agraph_t *	g,
		Agobj_t *	graph,
		void *	arg
	)

static

Definition at line 1059 of file rank.c.

References agbindrec(), and graph().

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◆ my_init_node()

static void my_init_node	(	Agraph_t *	g,
		Agobj_t *	node,
		void *	arg
	)

static

Definition at line 1061 of file rank.c.

References agbindrec().

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◆ node_induce()

static void node_induce	(	graph_t *	par,
		graph_t *	g
	)

static

Definition at line 241 of file rank.c.

References agcontains(), agdelete(), agfstnode(), agfstout(), aghead, agnxtnode(), agnxtout(), agsubedge(), dot_root(), GD_clust, GD_n_cluster, ND_clust, ND_ranktype, and NULL.

Referenced by collapse_cluster(), and set_parent().

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◆ rank1()

void rank1 ( graph_t * g )

Definition at line 442 of file rank.c.

References agget(), agnnodes(), GD_comp, GD_n_cluster, GD_nlist, rank(), and scale_clamp().

Referenced by dot1_rank().

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◆ rank_set_class()

static int rank_set_class ( graph_t * g )

static

Definition at line 214 of file rank.c.

References agget(), CLUSTER, GD_set_type, is_cluster(), maptoken(), MAXRANK, MINRANK, NULL, SAMERANK, SINKRANK, and SOURCERANK.

Referenced by collapse_sets().

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◆ rankset_kind()

static int rankset_kind ( graph_t * g )

static

Definition at line 568 of file rank.c.

References agget(), MAXRANK, MINRANK, NORANK, SAMERANK, SINKRANK, SOURCERANK, and str.

Referenced by compile_samerank().

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◆ readout_levels()

static void readout_levels	(	graph_t *	g,
		graph_t *	Xg,
		int	ncc
	)

static

Definition at line 956 of file rank.c.

References agfstnode(), agnxtnode(), delta, find(), free(), free_list, GD_maxrank, GD_minrank, gv_calloc(), MIN, ND_alg, ND_comp, ND_in, ND_out, ND_rank, ND_rep, NULL, and setMinMax().

Referenced by dot2_rank().

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◆ renewlist()

static void renewlist	(	elist *	L,
		edge_set_t *	track
	)

static

Parameters

track An optional collection in which to record non-null entries we removed

Definition at line 42 of file rank.c.

References L, NULL, and SIZE_MAX.

Referenced by cleanup1().

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◆ reverse_edge2()

static void reverse_edge2	(	graph_t *	g,
		edge_t *	e
	)

static

Definition at line 874 of file rank.c.

References agdelete(), agedge(), agfindedge, aghead, agtail, ED_minlen, ED_weight, and merge().

Referenced by dfs().

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◆ set_minmax()

static void set_minmax ( graph_t * g )

static

Definition at line 371 of file rank.c.

References GD_clust, GD_leader, GD_maxrank, GD_minrank, GD_n_cluster, ND_rank, and set_minmax().

Referenced by expand_ranksets(), and set_minmax().

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◆ set_parent()

static void set_parent	(	graph_t *	g,
		graph_t *	p
	)

static

Definition at line 551 of file rank.c.

References GD_parent, make_new_cluster(), and node_induce().

Referenced by compile_samerank().

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◆ setMinMax()

static void setMinMax	(	graph_t *	g,
		int	doRoot
	)

static

Definition at line 923 of file rank.c.

References agfstnode(), agnxtnode(), GD_clust, GD_leader, GD_maxrank, GD_minrank, GD_n_cluster, GD_parent, ND_rank, NULL, and setMinMax().

Referenced by readout_levels(), and setMinMax().

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◆ strong()

static void strong	(	graph_t *	g,
		node_t *	t,
		node_t *	h,
		edge_t *	orig
	)

static

Definition at line 767 of file rank.c.

References agedge(), agerrorf(), agfindedge, agnameof(), ED_minlen, ED_weight, and merge().

Referenced by compile_edges().

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◆ union_all()

static node_t * union_all ( graph_t * g )

static

Definition at line 617 of file rank.c.

References agfstnode(), agnxtnode(), find(), and union_one().

Referenced by compile_samerank().

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◆ union_one()

static node_t * union_one	(	node_t *	leader,
		node_t *	n
	)

static

Definition at line 609 of file rank.c.

References find(), and ND_set.

Referenced by compile_samerank(), and union_all().

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◆ weak()

static void weak	(	graph_t *	g,
		node_t *	t,
		node_t *	h,
		edge_t *	orig
	)

static

Definition at line 778 of file rank.c.

References agedge(), agfstin(), agfstout(), aghead, agnxtin(), agtail, BACKWARD_PENALTY, ED_minlen, ED_weight, id, makeXnode(), and MAX.

Referenced by compile_edges().

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Variable Documentation

◆ infosizes

int infosizes[]

Initial value:

= {
    sizeof(Agraphinfo_t), 
    sizeof(Agnodeinfo_t),
    sizeof(Agedgeinfo_t)
}

Definition at line 1067 of file rank.c.

Referenced by dot2_rank().

◆ Last_node

node_t* Last_node

static

Definition at line 726 of file rank.c.

Referenced by compile_nodes(), dot2_rank(), and makeXnode().

◆ mydisc

Agcbdisc_t mydisc = { {my_init_graph,0,0}, {my_init_node,0,0}, {my_init_edge,0,0} }

static

Definition at line 1065 of file rank.c.

Referenced by dot2_rank(), and myiddisc_open().

Macros

Functions

Variables

Macro Definition Documentation

◆ BACKWARD_PENALTY

◆ BOTNODE

◆ ND_comp

◆ NORANK

◆ ROOT

◆ STRONG_CLUSTER_WEIGHT

◆ TOPNODE

Function Documentation

◆ add_fast_edges()

◆ break_cycles()

◆ cleanup1()

◆ cluster_leader()

◆ collapse_cluster()

◆ collapse_rankset()

◆ collapse_sets()

◆ compile_clusters()

◆ compile_edges()

◆ compile_nodes()

◆ compile_samerank()

◆ connect_components()

◆ dfs()

◆ dfscc()

◆ dot1_rank()

◆ dot2_rank()

◆ dot_lca()

◆ dot_rank()

◆ dot_scan_ranks()

◆ edge_ptr_cmp()

◆ edgelabel_ranks()

◆ expand_ranksets()

◆ find()

◆ find_clusters()

◆ is_a_strong_cluster()

◆ is_cluster()

◆ is_empty()

◆ is_internal_to_cluster()

◆ is_nonconstraint()

◆ make_new_cluster()

◆ makeXnode()

◆ merge()

◆ minmax_edges()

◆ minmax_edges2()

◆ my_init_edge()

◆ my_init_graph()

◆ my_init_node()

◆ node_induce()

◆ rank1()

◆ rank_set_class()

◆ rankset_kind()

◆ readout_levels()

◆ renewlist()

◆ reverse_edge2()

◆ set_minmax()

◆ set_parent()

◆ setMinMax()

◆ strong()

◆ union_all()

◆ union_one()

◆ weak()

Variable Documentation

◆ infosizes

◆ Last_node

◆ mydisc