lapacke_dggbal.c

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* Contents: Native high-level C interface to LAPACK function dggbal
* Author: Intel Corporation
* Generated October, 2010
*****************************************************************************/

#include "lapacke.h"
#include "lapacke_utils.h"

lapack_int LAPACKE_dggbal( int matrix_order, char job, lapack_int n, double* a,
                           lapack_int lda, double* b, lapack_int ldb,
                           lapack_int* ilo, lapack_int* ihi, double* lscale,
                           double* rscale )
{
    lapack_int info = 0;
    /* Additional scalars declarations for work arrays */
    lapack_int lwork;
    double* work = NULL;
    if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dggbal", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
        LAPACKE_lsame( job, 'b' ) ) {
        if( LAPACKE_dge_nancheck( matrix_order, n, n, a, lda ) ) {
            return -4;
        }
    }
    if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
        LAPACKE_lsame( job, 'b' ) ) {
        if( LAPACKE_dge_nancheck( matrix_order, n, n, b, ldb ) ) {
            return -6;
        }
    }
#endif
    /* Additional scalars initializations for work arrays */
    if( LAPACKE_lsame( job, 's' ) || LAPACKE_lsame( job, 'b' ) ) {
        lwork = MAX(1,6*n);
    } else {
        lwork = 1;
    }
    /* Allocate memory for working array(s) */
    work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_dggbal_work( matrix_order, job, n, a, lda, b, ldb, ilo, ihi,
                                lscale, rscale, work );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dggbal", info );
    }
    return info;
}