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* Contents: Native high-level C interface to LAPACK function zgesvj
* Author: Intel Corporation
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_zgesvj( int matrix_layout, char joba, char jobu, char jobv,
                           lapack_int m, lapack_int n,
                           lapack_complex_double * a, lapack_int lda,
                           double* sva, lapack_int mv,
                           lapack_complex_double* v, lapack_int ldv, double* stat )
{
    lapack_int info = 0;
    lapack_int lwork = m+n;
    lapack_int lrwork = MAX(6,m+n);
    double* rwork = NULL;
    lapack_complex_double* cwork = NULL;
    lapack_int i;
    lapack_int nrows_v;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_zgesvj", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        nrows_v = LAPACKE_lsame( jobv, 'v' ) ? MAX(0,n) :
                ( LAPACKE_lsame( jobv, 'a' ) ? MAX(0,mv) : 0);
        if( LAPACKE_zge_nancheck( matrix_layout, m, n, a, lda ) ) {
            return -7;
        }
        if( LAPACKE_lsame( jobv, 'a' ) || LAPACKE_lsame( jobv, 'v' ) ) {
            if( LAPACKE_zge_nancheck( matrix_layout, nrows_v, n, v, ldv ) ) {
                return -11;
            }
        }
    }
#endif
    /* Allocate memory for working array(s) */
    cwork = (lapack_complex_double*)
        LAPACKE_malloc( sizeof(lapack_complex_double)  * lwork );
    if( cwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
    if( rwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    rwork[0] = stat[0];  /* Significant if jobu = 'c' */
    /* Call middle-level interface */
    info = LAPACKE_zgesvj_work( matrix_layout, joba, jobu, jobv, m, n, a, lda,
                                sva, mv, v, ldv, cwork, lwork, rwork, lrwork );
    /* Backup significant data from working array(s) */
    for( i=0; i<6; i++ ) {
        stat[i] = rwork[i];
    }

    /* Release memory and exit */
    LAPACKE_free( rwork );
exit_level_1:
    LAPACKE_free( cwork );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_zgesvj", info );
    }
    return info;
}
