lapacke_zhecon_3.c

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* Contents: Native high-level C interface to LAPACK function zhecon_3
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_zhecon_3( int matrix_layout, char uplo, lapack_int n,
                           const lapack_complex_double* a, lapack_int lda,
                           const lapack_complex_double* e,
                           const lapack_int* ipiv, double anorm, double* rcond )
{
    lapack_int info = 0;
    lapack_complex_double* work = NULL;
    lapack_int e_start = LAPACKE_lsame( uplo, 'U' ) ? 1 : 0;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_zhecon_3", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_zhe_nancheck( matrix_layout, uplo, n, a, lda ) ) {
            return -4;
        }
        if( LAPACKE_z_nancheck( n-1, e + e_start, 1 ) ) {
            return -6;
        }
        if( LAPACKE_d_nancheck( 1, &anorm, 1 ) ) {
            return -8;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    work = (lapack_complex_double*)
        LAPACKE_malloc( sizeof(lapack_complex_double) * MAX(1,2*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_zhecon_3_work( matrix_layout, uplo, n, a, lda, e, ipiv, anorm,
                                rcond, work );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_zhecon_3", info );
    }
    return info;
}