| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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 MINIKIN_U16STRING_PIECE_H |
| #define MINIKIN_U16STRING_PIECE_H |
| |
| #include <vector> |
| |
| #include "minikin/Range.h" |
| |
| namespace minikin { |
| |
| class U16StringPiece { |
| public: |
| U16StringPiece() : mData(nullptr), mLength(0) {} |
| U16StringPiece(const uint16_t* data, uint32_t length) : mData(data), mLength(length) {} |
| U16StringPiece(const std::vector<uint16_t>& v) // Intentionally not explicit. |
| : mData(v.data()), mLength(static_cast<uint32_t>(v.size())) {} |
| template <uint32_t length> |
| U16StringPiece(uint16_t const (&data)[length]) : mData(data), mLength(length) {} |
| |
| U16StringPiece(const U16StringPiece&) = default; |
| U16StringPiece& operator=(const U16StringPiece&) = default; |
| |
| inline const uint16_t* data() const { return mData; } |
| inline uint32_t size() const { return mLength; } |
| inline uint32_t length() const { return mLength; } |
| |
| // Undefined behavior if pos is out of range. |
| inline const uint16_t& at(uint32_t pos) const { return mData[pos]; } |
| inline const uint16_t& operator[](uint32_t pos) const { return mData[pos]; } |
| |
| inline U16StringPiece substr(const Range& range) const { |
| return U16StringPiece(mData + range.getStart(), range.getLength()); |
| } |
| |
| inline bool hasChar(uint16_t c) const { |
| const uint16_t* end = mData + mLength; |
| return std::find(mData, end, c) != end; |
| } |
| |
| private: |
| const uint16_t* mData; |
| uint32_t mLength; |
| }; |
| |
| } // namespace minikin |
| |
| #endif // MINIKIN_U16STRING_PIECE_H |