lapacke_dgtcon.c

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* Contents: Native high-level C interface to LAPACK function dgtcon
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_dgtcon( char norm, lapack_int n, const double* dl,
                           const double* d, const double* du, const double* du2,
                           const lapack_int* ipiv, double anorm, double* rcond )
{
    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, &anorm, 1 ) ) {
            return -8;
        }
        if( LAPACKE_d_nancheck( n, d, 1 ) ) {
            return -4;
        }
        if( LAPACKE_d_nancheck( n-1, dl, 1 ) ) {
            return -3;
        }
        if( LAPACKE_d_nancheck( n-1, du, 1 ) ) {
            return -5;
        }
        if( LAPACKE_d_nancheck( n-2, du2, 1 ) ) {
            return -6;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
    if( iwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,2*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_dgtcon_work( norm, n, dl, d, du, du2, ipiv, anorm, rcond,
                                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_dgtcon", info );
    }
    return info;
}