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+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * 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.
+ */
+
+#ifndef _MIR_INDEX_H_
+#define _MIR_INDEX_H_
+
+#include <initializer_list>
+#include <cstdint>
+#include <ostream>
+
+#include "mir/Common.h"
+
+#include "adtidas/SmallVector.h"
+
+namespace mir
+{
+
+class Index
+{
+public:
+ Index() = default;
+
+ Index(std::initializer_list<int32_t> &&l) noexcept : _indices(std::move(l))
+ {
+ // DO NOTHING
+ }
+
+ explicit Index(size_t rank) : _indices(rank) {}
+
+ int32_t rank() const { return static_cast<int32_t>(_indices.size()); }
+
+ /**
+ * @brief resize index to given dimension number
+ * @param size new number of dimensions
+ * @return *this
+ * @warning if new size is greater than old, new dimensions are undefined
+ */
+ Index &resize(int32_t size);
+
+ /**
+ * @brief fill all axis with `index`
+ * @return `*this`
+ */
+ Index &fill(int32_t index);
+
+ /**
+ * @brief return position on given axis
+ * @param axis index of axis to get index on. If axis is negative returns axis from the last
+ * @return
+ */
+ int32_t &at(int32_t axis) { return _indices[wrap_index(axis, _indices.size())]; }
+
+ /**
+ * @brief return position on given axis
+ * @param axis index of axis to get index on. If axis is negative returns axis from the last
+ * @return
+ */
+ int32_t at(int32_t axis) const { return _indices[wrap_index(axis, _indices.size())]; }
+
+private:
+ adt::small_vector<int32_t, MAX_DIMENSION_COUNT> _indices;
+};
+
+std::ostream &operator<<(std::ostream &s, const Index &idx);
+
+} // namespace mir
+
+#endif //_MIR_INDEX_H_