Graphviz 13.1.3~dev.20250829.0113
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rank.c File Reference
#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:

Go to the source code of this file.

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)
 
typedef LIST (edge_t *)
 
static int edge_ptr_cmp (const void *x, const void *y)
 
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_tfind (node_t *n)
 
static node_tunion_one (node_t *leader, node_t *n)
 
static node_tunion_all (graph_t *g)
 
static void compile_samerank (graph_t *ug, graph_t *parent_clust)
 
static graph_tdot_lca (graph_t *c0, graph_t *c1)
 
static bool is_internal_to_cluster (edge_t *e)
 
static node_tmakeXnode (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_tLast_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 541 of file rank.c.

◆ BOTNODE

#define BOTNODE   "\177bot"

Definition at line 546 of file rank.c.

◆ ND_comp

#define ND_comp (   n)    ND_hops(n)

Definition at line 551 of file rank.c.

◆ NORANK

#define NORANK   6

Definition at line 543 of file rank.c.

◆ ROOT

#define ROOT   "\177root"

Definition at line 544 of file rank.c.

◆ STRONG_CLUSTER_WEIGHT

#define STRONG_CLUSTER_WEIGHT   1000

Definition at line 542 of file rank.c.

◆ TOPNODE

#define TOPNODE   "\177top"

Definition at line 545 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 78 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, LIST_APPEND, LIST_FREE, LIST_GET, LIST_SIZE, LIST_SORT, ND_in, ND_mark, ND_next, ND_node_type, ND_out, ND_prev, NULL, prev, 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 294 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 325 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 177 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 344 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 806 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(), SWAP, 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 747 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 632 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 500 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 704 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 519 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 273 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 void *  x,
const void *  y 
)
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
aOne edge
bAnother 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 162 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 463 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 600 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 363 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 564 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 530 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 560 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 715 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 589 of file rank.c.

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

Referenced by compile_edges().

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◆ LIST()

typedef LIST ( edge_t )

Definition at line 38 of file rank.c.

References L, LIST_APPEND, NULL, and SIZE_MAX.

◆ make_new_cluster()

static int make_new_cluster ( graph_t g,
graph_t subg 
)
static

Definition at line 231 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 729 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 763 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 387 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 419 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 243 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 444 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 216 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 570 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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◆ 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 373 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 553 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 769 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 619 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 611 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 780 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 728 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().