LAPACKE_dlangb()

double LAPACKE_dlangb	(	int	matrix_layout,
		char	norm,
		lapack_int	n,
		lapack_int	kl,
		lapack_int	ku,
		const double *	ab,
		lapack_int	ldab
	)

Definition at line 35 of file lapacke_dlangb.c.

{
    lapack_int info = 0;
    double res = 0.;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dlangb", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_dgb_nancheck( matrix_layout, n, n, kl, ku, ab, ldab ) ) {
            return -6;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    if( LAPACKE_lsame( norm, 'i' ) ) {
        work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,n) );
        if( work == NULL ) {
            info = LAPACK_WORK_MEMORY_ERROR;
            goto exit_level_0;
        }
    }
    /* Call middle-level interface */
    res = LAPACKE_dlangb_work( matrix_layout, norm, n, kl, ku, ab, ldab, work );
    /* Release memory and exit */
    if( LAPACKE_lsame( norm, 'i' ) ) {
        LAPACKE_free( work );
    }
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dlangb", info );
    }
    return res;
}

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