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/* Copyright (c) 2006-2007, 2009-2014. The SimGrid Team.
 * All rights reserved.                                                     */

/* This program is free software; you can redistribute it and/or modify it
 * under the terms of the license (GNU LGPL) which comes with this package. */

#ifndef _XBT_GRAPH_H
#define _XBT_GRAPH_H
#include "xbt/misc.h"           /* SG_BEGIN_DECL */
#include "xbt/dynar.h"
SG_BEGIN_DECL()

  /** @addtogroup XBT_graph
   *  @brief A graph data type with several interesting algorithms
   *
   * @{
   */

typedef struct xbt_node *xbt_node_t;
typedef struct xbt_edge *xbt_edge_t;
typedef struct xbt_graph *xbt_graph_t;

/* Node structure */
/* Be careful of what you do with this structure */
/* typedef struct xbt_node *xbt_node_t; */
typedef struct xbt_node {
  xbt_dynar_t out;
  xbt_dynar_t in;               /* not used when the graph is directed */
  double position_x;            /* positive value: negative means undefined */
  double position_y;            /* positive value: negative means undefined */
  void *data;                   /* user data */
  void *xbtdata;                /* private xbt data: should be reinitialized at the
                                   beginning of your algorithm if you need to use it */
} s_xbt_node_t;

/* edge structure */
/* Be careful of what you do with this structure */
/* typedef struct xbt_edge *xbt_edge_t; */
typedef struct xbt_edge {
  xbt_node_t src;
  xbt_node_t dst;
  void *data;                   /* user data */
  void *xbtdata;                /* private xbt data: should be reinitialized at the
                                   beginning of your algorithm if you need to use it */
  double length;                /* positive value: negative means undefined */
} s_xbt_edge_t;

/* Graph structure */
/* Be careful of what you do with this structure */
/* typedef struct xbt_graph *xbt_graph_t; */
typedef struct xbt_graph {
  xbt_dynar_t nodes;
  xbt_dynar_t edges;
  unsigned short int directed;
  void *data;                   /* user data */
  void *xbtdata;                /* private xbt data: should be reinitialized at the
                                   beginning of your algorithm if you need to use it */
} s_xbt_graph_t;

/* API */
XBT_PUBLIC(xbt_graph_t) xbt_graph_new_graph(unsigned short int directed, void *data);
XBT_PUBLIC(xbt_node_t) xbt_graph_new_node(xbt_graph_t g, void *data);
XBT_PUBLIC(xbt_edge_t) xbt_graph_new_edge(xbt_graph_t g, xbt_node_t src, xbt_node_t dst, void *data);
XBT_PUBLIC(void *) xbt_graph_node_get_data(xbt_node_t node);
XBT_PUBLIC(void) xbt_graph_node_set_data(xbt_node_t node, void *data);
XBT_PUBLIC(void *) xbt_graph_edge_get_data(xbt_edge_t edge);
XBT_PUBLIC(void) xbt_graph_edge_set_data(xbt_edge_t edge, void *data);

XBT_PUBLIC(xbt_edge_t) xbt_graph_get_edge(xbt_graph_t g, xbt_node_t src, xbt_node_t dst);

XBT_PUBLIC(void) xbt_graph_edge_set_length(xbt_edge_t e, double length);
XBT_PUBLIC(double) xbt_graph_edge_get_length(xbt_edge_t e);

XBT_PUBLIC(void) xbt_graph_free_graph(xbt_graph_t g,
    void_f_pvoid_t node_free_function, void_f_pvoid_t edge_free_function, void_f_pvoid_t graph_free_function);

XBT_PUBLIC(xbt_dynar_t) xbt_graph_get_nodes(xbt_graph_t g);
XBT_PUBLIC(xbt_dynar_t) xbt_graph_get_edges(xbt_graph_t g);
XBT_PUBLIC(xbt_dynar_t) xbt_graph_node_get_outedges(xbt_node_t n);
XBT_PUBLIC(xbt_node_t) xbt_graph_edge_get_source(xbt_edge_t e);
XBT_PUBLIC(xbt_node_t) xbt_graph_edge_get_target(xbt_edge_t e);

XBT_PUBLIC(void) xbt_graph_export_graphviz(xbt_graph_t g, const char *filename,
    const char *(node_name) (xbt_node_t), const char *(edge_name) (xbt_edge_t));

SG_END_DECL()
#endif                          /* _XBT_GRAPH_H */
/** @} */