/* Copyright 2004,2007,2020,2021 IPB, Universite de Bordeaux, INRIA & CNRS
**
** This file is part of the Scotch software package for static mapping,
** graph partitioning and sparse matrix ordering.
**
** This software is governed by the CeCILL-C license under French law
** and abiding by the rules of distribution of free software. You can
** use, modify and/or redistribute the software under the terms of the
** CeCILL-C license as circulated by CEA, CNRS and INRIA at the following
** URL: "http://www.cecill.info".
**
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** only with a limited warranty and the software's author, the holder of
** the economic rights, and the successive licensors have only limited
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**
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**
** The fact that you are presently reading this means that you have had
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*/
/************************************************************/
/**                                                        **/
/**   NAME       : mesh_graph.h                            **/
/**                                                        **/
/**   AUTHOR     : Francois PELLEGRINI                     **/
/**                                                        **/
/**   FUNCTION   : These lines are the data declarations   **/
/**                for the source mesh to source graph     **/
/**                building routine.                       **/
/**                                                        **/
/**   DATES      : # Version 4.0  : from : 13 oct 2003     **/
/**                                 to   : 13 oct 2003     **/
/**                # Version 6.1  : from : 20 nov 2020     **/
/**                                 to   : 28 feb 2021     **/
/**                                                        **/
/************************************************************/

/*
**  The defines.
*/

/** Prime number for cache-friendly perturbations. **/

#define MESHGRAPHHASHPRIME          37            /* Prime number */

/*
**  The type and structure definitions.
*/

/*+ A table made of such elements is used during
    graph building to build the edge array of the
    graph from the one of the mesh.               +*/

typedef struct MeshGraphHash_ {
  Gnum                      vertnum;              /*+ Origin vertex (i.e. pass) number in mesh +*/
  Gnum                      vertend;              /*+ End vertex number in mesh                +*/
} MeshGraphHash;

typedef struct MeshGraphDualHash_ {
  Gnum                      vertnum;              /*+ Origin vertex (i.e. pass) number in mesh                 +*/
  Gnum                      vertend;              /*+ End vertex number in mesh                                +*/
  Gnum                      nghbnbr;              /*+ number of neighbours to define relation between elements +*/
} MeshGraphDualHash;
