/*
 *  Copyright 2008-2010 NVIDIA Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */


/*! \file reduce.h
 *  \brief Device implementations for reduce.
 */

#pragma once

#include <thrust/detail/device/dispatch/reduce.h>
#include <thrust/detail/device/generic/reduce_by_key.h>

#include <thrust/iterator/iterator_traits.h>

namespace thrust
{
namespace detail
{
namespace device
{

template<typename InputIterator, 
         typename OutputType,
         typename BinaryFunction>
  OutputType reduce(InputIterator first,
                    InputIterator last,
                    OutputType init,
                    BinaryFunction binary_op)
{
    // dispatch on space
    return thrust::detail::device::dispatch::reduce(first, last, init, binary_op,
            typename thrust::iterator_space<InputIterator>::type());
}

template <typename InputIterator1,
          typename InputIterator2,
          typename OutputIterator1,
          typename OutputIterator2,
          typename BinaryPredicate,
          typename BinaryFunction>
  thrust::pair<OutputIterator1,OutputIterator2>
  reduce_by_key(InputIterator1 keys_first, 
                     InputIterator1 keys_last,
                     InputIterator2 values_first,
                     OutputIterator1 keys_output,
                     OutputIterator2 values_output,
                     BinaryPredicate binary_pred,
                     BinaryFunction binary_op)
{
    // use generic path
    return thrust::detail::device::generic::reduce_by_key(keys_first, keys_last, values_first, keys_output, values_output, binary_pred, binary_op);
}

} // end namespace device
} // end namespace detail
} // end namespace thrust