lapacke_dstebz.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_dstebz (char range, char order, lapack_int n, double vl, double vu, lapack_int il, lapack_int iu, double abstol, const double *d, const double *e, lapack_int *m, lapack_int *nsplit, double *w, lapack_int *iblock, lapack_int *isplit)

Function Documentation

LAPACKE_dstebz()

lapack_int LAPACKE_dstebz	(	char	range,
		char	order,
		lapack_int	n,
		double	vl,
		double	vu,
		lapack_int	il,
		lapack_int	iu,
		double	abstol,
		const double *	d,
		const double *	e,
		lapack_int *	m,
		lapack_int *	nsplit,
		double *	w,
		lapack_int *	iblock,
		lapack_int *	isplit )

Definition at line 35 of file lapacke_dstebz.c.

{
    lapack_int info = 0;
    lapack_int* iwork = NULL;
    double* work = NULL;
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_d_nancheck( 1, &abstol, 1 ) ) {
            return -8;
        }
        if( LAPACKE_d_nancheck( n, d, 1 ) ) {
            return -9;
        }
        if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
            return -10;
        }
        if( LAPACKE_lsame( range, 'v' ) ) {
            if( LAPACKE_d_nancheck( 1, &vl, 1 ) ) {
                return -4;
            }
        }
        if( LAPACKE_lsame( range, 'v' ) ) {
            if( LAPACKE_d_nancheck( 1, &vu, 1 ) ) {
                return -5;
            }
        }
    }
#endif
    /* Allocate memory for working array(s) */
    iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,3*n) );
    if( iwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,4*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_dstebz_work( range, order, n, vl, vu, il, iu, abstol, d, e,
                                m, nsplit, w, iblock, isplit, work, iwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_1:
    LAPACKE_free( iwork );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dstebz", info );
    }
    return info;
}