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/*
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) 2008-2008 - INRIA - Allan SIMON
*
* This file must be used under the terms of the CeCILL.
* This source file is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at
* http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
*
*/
#include <stdlib.h>
#include <string.h>
#include "matrixDivision.h"
#include "lapack.h"
void i8ldivma (int8* in1, int lines1, int columns1 ,
int8* in2, int lines2, int columns2 ,
int8* out ){
char cNorm = 0;
int iExit = 0;
/*temporary variables*/
int iWork = 0;
int iInfo = 0;
int iMax = 0;
int8 dblRcond = 0;
int8 dblEps = 0;
int8 dblAnorm = 0;
int8 *pAf = NULL;
int8 *pXb = NULL;
int8 *pDwork = NULL;
int *pRank = NULL;
int *pIpiv = NULL;
int *pJpvt = NULL;
int *pIwork = NULL;
iWork = max(4 * columns1, max(min(lines1, columns1) + 3 * lines1 + 1, 2 * min(lines1, columns1) + columns2));
lines2 = 0 ;
/* Array allocations*/
pAf = (int8*)malloc(sizeof(int8) * (unsigned int) lines1 * (unsigned int) columns1);
pXb = (int8*)malloc(sizeof(int8) * (unsigned int) max(lines1,columns1) * (unsigned int) columns2);
pRank = (int*)malloc(sizeof(int));
pIpiv = (int*)malloc(sizeof(int) *(unsigned int) columns1);
pJpvt = (int*)malloc(sizeof(int) *(unsigned int) columns1);
pIwork = (int*)malloc(sizeof(int) *(unsigned int) columns1);
cNorm = '1';
pDwork = (int8*)malloc(sizeof(int8) *(unsigned int)iWork);
dblEps = getRelativeMachinePrecision() ;
dblAnorm = dlange_(&cNorm, &lines1, &columns1, in1, &lines1, pDwork);
if(lines1 == columns1)
{
cNorm = 'F';
dlacpy_(&cNorm, &columns1, &columns1, in1, &columns1, pAf, &columns1);
dgetrf_(&columns1, &columns1, pAf, &columns1, pIpiv, &iInfo);
if(iInfo == 0)
{
cNorm = '1';
C2F(dgecon)(&cNorm, &columns1, pAf, &columns1, &dblAnorm, &dblRcond, pDwork, pIwork, &iInfo);
if(dblRcond > sqrt(dblEps))
{
cNorm = 'N';
C2F(dgetrs)(&cNorm, &columns1, &columns2, pAf, &columns1, pIpiv, in2, &columns1, &iInfo);
cNorm = 'F';
C2F(dlacpy)(&cNorm, &columns1, &columns2, in2, &columns1, out, &columns1);
iExit = 1;
}
}
}
if(iExit == 0)
{
dblRcond = sqrt(dblEps);
cNorm = 'F';
iMax = max(lines1, columns1);
C2F(dlacpy)(&cNorm, &lines1, &columns2, in2, &lines1, pXb, &iMax);
memset(pJpvt, 0x00,(unsigned int) sizeof(int) * (unsigned int) columns1);
C2F(dgelsy)( &lines1, &columns1, &columns2, in1, &lines1, pXb, &iMax,
pJpvt, &dblRcond, &pRank[0], pDwork, &iWork, &iInfo);
if(iInfo == 0)
{
cNorm = 'F';
C2F(dlacpy)(&cNorm, &columns1, &columns2, pXb, &iMax, out, &columns1);
}
}
free(pAf);
free(pXb);
free(pRank);
free(pIpiv);
free(pJpvt);
free(pIwork);
free(pDwork);
}
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