109 lines
2.0 KiB
C++
109 lines
2.0 KiB
C++
/*
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* Copyright (C) 2018-2019 Intel Corporation
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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#pragma once
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#include <cstddef>
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#include <type_traits>
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#include <utility>
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template <typename DataType>
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class ArrayRef {
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public:
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using iterator = DataType *;
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using const_iterator = const DataType *;
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template <typename IteratorType>
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ArrayRef(IteratorType b, IteratorType e) {
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if (b != nullptr) {
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this->b = &*b;
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this->e = &*(e - 1) + 1;
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} else {
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this->b = nullptr;
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this->e = nullptr;
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}
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}
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template <typename IteratorType>
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ArrayRef(IteratorType b, size_t s)
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: ArrayRef(b, b + s) {
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}
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template <typename SequentialContainerType>
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ArrayRef(SequentialContainerType &ctr)
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: b(&*ctr.begin()), e(&*(ctr.end() - 1) + 1) {
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}
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template <size_t Size>
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ArrayRef(DataType (&array)[Size])
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: b(&array[0]), e(&array[Size]) {
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}
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ArrayRef() = default;
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size_t size() const {
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return e - b;
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}
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DataType &operator[](std::size_t idx) {
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return b[idx];
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}
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const DataType &operator[](std::size_t idx) const {
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return b[idx];
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}
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iterator begin() {
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return b;
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}
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const_iterator begin() const {
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return b;
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}
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iterator end() {
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return e;
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}
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const_iterator end() const {
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return e;
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}
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void swap(ArrayRef &rhs) {
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std::swap(b, rhs.b);
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std::swap(e, rhs.e);
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}
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operator ArrayRef<const DataType>() {
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return ArrayRef<const DataType>(b, e);
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}
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private:
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DataType *b = nullptr;
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DataType *e = nullptr;
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};
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template <typename T>
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bool operator==(const ArrayRef<T> &lhs,
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const ArrayRef<T> &rhs) {
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if (lhs.size() != rhs.size()) {
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return false;
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}
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auto lhsIt = lhs.begin();
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auto lhsEnd = lhs.end();
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auto rhsIt = rhs.begin();
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for (; lhsIt != lhsEnd; ++lhsIt, ++rhsIt) {
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if (*lhsIt != *rhsIt) {
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return false;
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}
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}
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return true;
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}
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