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/*
* Copyright (c) 2017-2018 Arm Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef ARM_COMPUTE_TEST_DATASET_ZIP
#define ARM_COMPUTE_TEST_DATASET_ZIP
#include "Dataset.h"
#include <string>
#include <tuple>
#include <utility>
namespace arm_compute
{
namespace test
{
namespace framework
{
namespace dataset
{
/** Implementation of a dataset representing pairs of values of the input datasets.
*
* For example, for the inputs {1, 2} and {3, 4} this dataset virtually
* represents the values {(1, 3), (1, 4)}.
*/
template <typename T, typename U>
class ZipDataset : public Dataset
{
private:
using iter1_type = typename T::iterator;
using iter2_type = typename U::iterator;
public:
/** Construct dataset from the given datasets.
*
* @param[in] dataset1 First dataset.
* @param[in] dataset2 Second dataset.
*/
ZipDataset(T &&dataset1, U &&dataset2)
: _dataset1{ std::forward<T>(dataset1) },
_dataset2{ std::forward<U>(dataset2) }
{
}
/** Allow instances of this class to be move constructed */
ZipDataset(ZipDataset &&) = default;
/** Type of the dataset. */
using type = decltype(std::tuple_cat(*std::declval<iter1_type>(), *std::declval<iter2_type>()));
/** Iterator for the dataset. */
struct iterator
{
/** Construct an iterator.
*
* @param[in] iter1 Iterator 1.
* @param[in] iter2 Iterator 2.
*/
iterator(iter1_type iter1, iter2_type iter2)
: _iter1{ std::move(iter1) }, _iter2{ std::move(iter2) }
{
}
/** Get the description of the current value.
*
* @return description of the current value.
*/
std::string description() const
{
return _iter1.description() + ":" + _iter2.description();
}
/** Get the value of the iterator.
*
* @return the value of the iterator.
*/
ZipDataset::type operator*() const
{
return std::tuple_cat(*_iter1, *_iter2);
}
/** Inrement the iterator.
*
* @return *this;
*/
iterator &operator++()
{
++_iter1;
++_iter2;
return *this;
}
private:
iter1_type _iter1;
iter2_type _iter2;
};
/** Iterator pointing at the begin of the dataset.
*
* @return Iterator for the dataset.
*/
iterator begin() const
{
return iterator(_dataset1.begin(), _dataset2.begin());
}
/** Size of the dataset.
*
* @return Number of values in the dataset.
*/
int size() const
{
return std::min(_dataset1.size(), _dataset2.size());
}
private:
T _dataset1;
U _dataset2;
};
/** Helper function to create a @ref ZipDataset.
*
* @param[in] dataset1 First dataset.
* @param[in] dataset2 Second dataset.
*
* @return A zip dataset.
*/
template <typename T, typename U>
ZipDataset<T, U> zip(T &&dataset1, U &&dataset2)
{
return ZipDataset<T, U>(std::forward<T>(dataset1), std::forward<U>(dataset2));
}
} // namespace dataset
} // namespace framework
} // namespace test
} // namespace arm_compute
#endif /* ARM_COMPUTE_TEST_DATASET_ZIP */
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