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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.
+ */
+
+/**
+ * @file IndexIterator.h
+ * @brief This file contains IndexIterator class
+ * @ingroup COM_AI_RUNTIME
+ */
+
+#ifndef __NNFW_MISC_KERNEL_INDEX_ITERATOR_H__
+#define __NNFW_MISC_KERNEL_INDEX_ITERATOR_H__
+
+#include "misc/kernel/Shape.h"
+
+namespace nnfw
+{
+namespace misc
+{
+namespace kernel
+{
+
+/**
+ * @brief Class to iterate Callable with Index of kernel
+ */
+class IndexIterator
+{
+public:
+ /**
+ * @brief Construct IndexIterator object with Shape of kernel
+ * @param[in] shape Shape reference of feature
+ */
+ IndexIterator(const Shape &shape) : _shape{shape}
+ {
+ // DO NOTHING
+ }
+
+public:
+ /**
+ * @brief Call a function iterated
+ * @param[in] cb A callback function
+ * @return Current IndexIterator object
+ */
+ template <typename Callable> IndexIterator &iter(Callable cb)
+ {
+ for (int32_t nth = 0; nth < _shape.N; ++nth)
+ {
+ for (int32_t ch = 0; ch < _shape.C; ++ch)
+ {
+ for (int32_t row = 0; row < _shape.H; ++row)
+ {
+ for (int32_t col = 0; col < _shape.W; ++col)
+ {
+ cb(nth, ch, row, col);
+ }
+ }
+ }
+ }
+
+ return (*this);
+ }
+
+private:
+ const Shape _shape; /**< Shape for kernel */
+};
+
+/**
+ * @brief Create an object of IndexIterator for kernel
+ * @param[in] shape reference of feature
+ * @return Created IndexIterator object
+ */
+inline IndexIterator iterate(const Shape &shape) { return IndexIterator{shape}; }
+
+/**
+ * @brief Call a function iterated using IndexIterator of kernel
+ * Overloaded operator<<
+ * @param[in] it An IndexIterator reference
+ * @param[in] cb A callback function
+ * @return Created IndexIterator object
+ */
+template <typename Callable> IndexIterator &operator<<(IndexIterator &&it, Callable cb)
+{
+ return it.iter(cb);
+}
+
+} // namespace kernel
+} // namespace misc
+} // namespace nnfw
+
+#endif // __NNFW_MISC_FEATURE_INDEX_ITERATOR_H__