sgraph.h

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/*************************************************************************
 * 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
 *
 * Contributors: Details at https://graphviz.org
 *************************************************************************/
 
#pragma once
 
#include <ortho/structures.h>
#include <stdbool.h>
 
typedef struct snode snode;
typedef struct sedge sedge;
 
struct snode {
  int n_val, n_idx;
  snode* n_dad;
  sedge* n_edge;
  short   n_adj;
  short   save_n_adj;
  struct cell* cells[2]; 
 
  int* adj_edge_list;
  int index;
  bool isVert;  /* true if node corresponds to vertical segment */
};
 
struct sedge {
  double weight;    /* weight of edge */
  int cnt;          /* paths using edge */
      /* end-points of the edge 
       * -- stored as indices of the nodes vector in the graph
       */
  int v1, v2;
};
 
typedef struct {
  int nnodes, nedges;
  int save_nnodes, save_nedges;
  snode* nodes;
  sedge* edges;
} sgraph;
 
extern void reset(sgraph*);
extern void gsave(sgraph*);
extern sgraph* createSGraph(int);
extern void freeSGraph (sgraph*);
extern void initSEdges (sgraph* g, int maxdeg);
extern int shortPath (sgraph* g, snode* from, snode* to);
extern snode* createSNode (sgraph*);
extern sedge* createSEdge (sgraph* g, snode* v0, snode* v1, double wt);