LAPACKE_dtrsna()

lapack_int LAPACKE_dtrsna	(	int	matrix_layout,
		char	job,
		char	howmny,
		const lapack_logical *	select,
		lapack_int	n,
		const double *	t,
		lapack_int	ldt,
		const double *	vl,
		lapack_int	ldvl,
		const double *	vr,
		lapack_int	ldvr,
		double *	s,
		double *	sep,
		lapack_int	mm,
		lapack_int *	m
	)

Definition at line 35 of file lapacke_dtrsna.c.

{
    lapack_int info = 0;
    lapack_int ldwork =  LAPACKE_lsame( job, 'e' ) ? 1 : MAX(1,n) ;
    lapack_int* iwork = NULL;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dtrsna", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_dge_nancheck( matrix_layout, n, n, t, ldt ) ) {
            return -6;
        }
        if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
            if( LAPACKE_dge_nancheck( matrix_layout, n, mm, vl, ldvl ) ) {
                return -8;
            }
        }
        if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
            if( LAPACKE_dge_nancheck( matrix_layout, n, mm, vr, ldvr ) ) {
                return -10;
            }
        }
    }
#endif
    /* Allocate memory for working array(s) */
    if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
        iwork = (lapack_int*)
            LAPACKE_malloc( sizeof(lapack_int) * MAX(1,2*(n-1)) );
        if( iwork == NULL ) {
            info = LAPACK_WORK_MEMORY_ERROR;
            goto exit_level_0;
        }
    }
    if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
        work = (double*)LAPACKE_malloc( sizeof(double) * ldwork * MAX(1,n+6) );
        if( work == NULL ) {
            info = LAPACK_WORK_MEMORY_ERROR;
            goto exit_level_1;
        }
    }
    /* Call middle-level interface */
    info = LAPACKE_dtrsna_work( matrix_layout, job, howmny, select, n, t, ldt,
                                vl, ldvl, vr, ldvr, s, sep, mm, m, work, ldwork,
                                iwork );
    /* Release memory and exit */
    if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
        LAPACKE_free( work );
    }
exit_level_1:
    if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
        LAPACKE_free( iwork );
    }
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dtrsna", info );
    }
    return info;

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