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/* Copyright 2007 ENSEIRB, 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".
**
** As a counterpart to the access to the source code and rights to copy,
** modify and redistribute granted by the license, users are provided
** only with a limited warranty and the software's author, the holder of
** the economic rights, and the successive licensors have only limited
** liability.
**
** In this respect, the user's attention is drawn to the risks associated
** with loading, using, modifying and/or developing or reproducing the
** software by the user in light of its specific status of free software,
** that may mean that it is complicated to manipulate, and that also
** therefore means that it is reserved for developers and experienced
** professionals having in-depth computer knowledge. Users are therefore
** encouraged to load and test the software's suitability as regards
** their requirements in conditions enabling the security of their
** systems and/or data to be ensured and, more generally, to use and
** operate it in the same conditions as regards security.
**
** The fact that you are presently reading this means that you have had
** knowledge of the CeCILL-C license and that you accept its terms.
*/
/************************************************************/
/** **/
/** NAME : metis_graph_order.c **/
/** **/
/** AUTHOR : Francois PELLEGRINI **/
/** **/
/** FUNCTION : This module is the compatibility **/
/** library for the MeTiS ordering **/
/** routines. **/
/** **/
/** DATES : # Version 5.0 : from : 08 sep 2006 **/
/** to 07 jun 2007 **/
/** **/
/************************************************************/
/*
** The defines and includes.
*/
#define LIBRARY
#include "common.h"
#include "scotch.h"
#include "metis.h" /* Our "metis.h" file */
/************************************/
/* */
/* These routines are the C API for */
/* MeTiS graph ordering routines. */
/* */
/************************************/
/*
**
*/
void
METIS_EdgeND (
const int * const n,
const int * const xadj,
const int * const adjncy,
const int * const numflag,
const int * const options,
int * const perm,
int * const iperm)
{
METIS_NodeWND (n, xadj, adjncy, NULL, numflag, options, perm, iperm);
}
/*
**
*/
void
METIS_NodeND (
const int * const n,
const int * const xadj,
const int * const adjncy,
const int * const numflag,
const int * const options,
int * const perm,
int * const iperm)
{
METIS_NodeWND (n, xadj, adjncy, NULL, numflag, options, perm, iperm);
}
/*
**
*/
void
METIS_NodeWND (
const int * const n,
const int * const xadj,
const int * const adjncy,
const int * const vwgt,
const int * const numflag,
const int * const options,
int * const perm,
int * const iperm)
{
SCOTCH_Graph grafdat; /* Scotch graph object to interface with libScotch */
SCOTCH_Ordering ordedat; /* Scotch ordering object to interface with libScotch */
SCOTCH_Strat stradat;
if (sizeof (SCOTCH_Num) != sizeof (int)) {
SCOTCH_errorPrint ("METIS_*ND (as of SCOTCH): SCOTCH_Num type should equate to int");
return;
}
SCOTCH_graphInit (&grafdat);
if (SCOTCH_graphBuild (&grafdat,
*numflag, *n, xadj, xadj + 1, vwgt, NULL,
xadj[*n] - *numflag, adjncy, NULL) == 0) {
SCOTCH_stratInit (&stradat);
#ifdef SCOTCH_DEBUG_ALL
if (SCOTCH_graphCheck (&grafdat) == 0) /* TRICK: next instruction called only if graph is consistent */
#endif /* SCOTCH_DEBUG_ALL */
{
if (SCOTCH_graphOrderInit (&grafdat, &ordedat, iperm, perm, /* MeTiS and Scotch have opposite definitions for (inverse) permutations */
NULL, NULL, NULL) == 0) {
SCOTCH_graphOrderCompute (&grafdat, &ordedat, &stradat);
SCOTCH_graphOrderExit (&grafdat, &ordedat);
}
}
SCOTCH_stratExit (&stradat);
}
SCOTCH_graphExit (&grafdat);
}
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