lapacke_zupgtr.c

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* Contents: Native high-level C interface to LAPACK function zupgtr
* Author: Intel Corporation
* Generated November 2015
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_zupgtr( int matrix_layout, char uplo, lapack_int n,
                           const lapack_complex_double* ap,
                           const lapack_complex_double* tau,
                           lapack_complex_double* q, lapack_int ldq )
{
    lapack_int info = 0;
    lapack_complex_double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_zupgtr", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_zpp_nancheck( n, ap ) ) {
        return -4;
    }
    if( LAPACKE_z_nancheck( n-1, tau, 1 ) ) {
        return -5;
    }
#endif
    /* Allocate memory for working array(s) */
    work = (lapack_complex_double*)
        LAPACKE_malloc( sizeof(lapack_complex_double) * MAX(1,n-1) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_zupgtr_work( matrix_layout, uplo, n, ap, tau, q, ldq, work );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_zupgtr", info );
    }
    return info;
}