1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef AAPT_TEXT_UTF8ITERATOR_H 18 #define AAPT_TEXT_UTF8ITERATOR_H 19 20 #include "android-base/macros.h" 21 #include "androidfw/StringPiece.h" 22 23 namespace aapt { 24 namespace text { 25 26 class Utf8Iterator { 27 public: 28 explicit Utf8Iterator(const android::StringPiece& str); 29 30 bool HasNext() const; 31 32 // Returns the current position of the iterator in bytes of the source UTF8 string. 33 // This position is the start of the codepoint returned by the next call to Next(). 34 size_t Position() const; 35 36 void Skip(int amount); 37 38 char32_t Next(); 39 40 private: 41 DISALLOW_COPY_AND_ASSIGN(Utf8Iterator); 42 43 void DoNext(); 44 45 android::StringPiece str_; 46 size_t current_pos_; 47 size_t next_pos_; 48 char32_t current_codepoint_; 49 }; 50 51 } // namespace text 52 } // namespace aapt 53 54 #endif // AAPT_TEXT_UTF8ITERATOR_H 55