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*****************************************************************************
* Contents: Native high-level C interface to LAPACK function strexc
* Author: Intel Corporation
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_strexc( int matrix_layout, char compq, lapack_int n, float* t,
                           lapack_int ldt, float* q, lapack_int ldq,
                           lapack_int* ifst, lapack_int* ilst )
{
    lapack_int info = 0;
    float* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_strexc", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_lsame( compq, 'v' ) ) {
            if( LAPACKE_sge_nancheck( matrix_layout, n, n, q, ldq ) ) {
                return -6;
            }
        }
        if( LAPACKE_sge_nancheck( matrix_layout, n, n, t, ldt ) ) {
            return -4;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    work = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_strexc_work( matrix_layout, compq, n, t, ldt, q, ldq, ifst,
                                ilst, work );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_strexc", info );
    }
    return info;
}
