lapacke_dgeqpf.c

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* Contents: Native high-level C interface to LAPACK function dgeqpf
* Author: Intel Corporation
* Generated November 2015
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_dgeqpf( int matrix_layout, lapack_int m, lapack_int n,
                           double* a, lapack_int lda, lapack_int* jpvt,
                           double* tau )
{
    lapack_int info = 0;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dgeqpf", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_dge_nancheck( matrix_layout, m, n, a, lda ) ) {
            return -4;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,3*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_dgeqpf_work( matrix_layout, m, n, a, lda, jpvt, tau, work );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dgeqpf", info );
    }
    return info;
}