From 69e44dc073bae7f7f54923d306a52d809b1334d5 Mon Sep 17 00:00:00 2001
From: Moritz Pflanzer <moritz.pflanzer@arm.com>
Date: Wed, 5 Jul 2017 11:02:14 +0100
Subject: COMPMID-415: New framework - datasets [2/5]

Change-Id: Ice4e5d73f40ba2f105663924393afcc88db07973
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/79756
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
---
 framework/datasets/CartesianProductDataset.h | 163 +++++++++++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 framework/datasets/CartesianProductDataset.h

(limited to 'framework/datasets/CartesianProductDataset.h')

diff --git a/framework/datasets/CartesianProductDataset.h b/framework/datasets/CartesianProductDataset.h
new file mode 100644
index 0000000000..e03a45da1f
--- /dev/null
+++ b/framework/datasets/CartesianProductDataset.h
@@ -0,0 +1,163 @@
+/*
+ * Copyright (c) 2017 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_CARTESIAN_PRODUCT
+#define ARM_COMPUTE_TEST_DATASET_CARTESIAN_PRODUCT
+
+#include "Dataset.h"
+
+#include <string>
+#include <tuple>
+#include <utility>
+
+namespace arm_compute
+{
+namespace test
+{
+namespace framework
+{
+namespace dataset
+{
+/** Implementation of a dataset representing all combinations 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), (2, 3), (2, 4)}.
+ */
+template <typename T, typename U>
+class CartesianProductDataset : 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.
+     */
+    CartesianProductDataset(T &&dataset1, U &&dataset2)
+        : _dataset1{ std::forward<T>(dataset1) },
+          _dataset2{ std::forward<U>(dataset2) }
+    {
+    }
+
+    CartesianProductDataset(CartesianProductDataset &&) = 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
+    {
+        iterator(const T *dataset1, const U *dataset2)
+            : _iter1{ dataset1->begin() },
+              _dataset2{ dataset2 },
+              _iter2{ dataset2->begin() }
+        {
+        }
+
+        iterator(const iterator &) = default;
+        iterator &operator=(const iterator &) = default;
+        iterator(iterator &&)                 = default;
+        iterator &operator=(iterator &&) = default;
+
+        ~iterator() = default;
+
+        std::string description() const
+        {
+            return _iter1.description() + ":" + _iter2.description();
+        }
+
+        CartesianProductDataset::type operator*() const
+        {
+            return std::tuple_cat(*_iter1, *_iter2);
+        }
+
+        iterator &operator++()
+        {
+            ++_second_pos;
+
+            if(_second_pos < _dataset2->size())
+            {
+                ++_iter2;
+            }
+            else
+            {
+                _second_pos = 0;
+                _iter2      = _dataset2->begin();
+
+                ++_iter1;
+            }
+
+            return *this;
+        }
+
+    private:
+        iter1_type _iter1;
+        const U   *_dataset2;
+        iter2_type _iter2;
+        int        _first_pos{ 0 };
+        int        _second_pos{ 0 };
+    };
+
+    /** Iterator pointing at the begin of the dataset.
+     *
+     * @return Iterator for the dataset.
+     */
+    iterator begin() const
+    {
+        return iterator(&_dataset1, &_dataset2);
+    }
+
+    /** Size of the dataset.
+     *
+     * @return Number of values in the dataset.
+     */
+    int size() const
+    {
+        return _dataset1.size() * _dataset2.size();
+    }
+
+private:
+    T _dataset1;
+    U _dataset2;
+};
+
+/** Helper function to create a @ref CartesianProductDataset.
+ *
+ * @param[in] dataset1 First dataset.
+ * @param[in] dataset2 Second dataset.
+ *
+ * @return A grid dataset.
+ */
+template <typename T, typename U>
+CartesianProductDataset<T, U> combine(T &&dataset1, U &&dataset2)
+{
+    return CartesianProductDataset<T, U>(std::forward<T>(dataset1), std::forward<U>(dataset2));
+}
+} // namespace dataset
+} // namespace framework
+} // namespace test
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_TEST_DATASET_CARTESIAN_PRODUCT */
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