1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/i18n/char_iterator.h" 6 7 #include "unicode/utf8.h" 8 #include "unicode/utf16.h" 9 10 namespace base { 11 namespace i18n { 12 13 UTF8CharIterator::UTF8CharIterator(const std::string* str) 14 : str_(reinterpret_cast<const uint8_t*>(str->data())), 15 len_(str->size()), 16 array_pos_(0), 17 next_pos_(0), 18 char_pos_(0), 19 char_(0) { 20 if (len_) 21 U8_NEXT(str_, next_pos_, len_, char_); 22 } 23 24 UTF8CharIterator::~UTF8CharIterator() { 25 } 26 27 bool UTF8CharIterator::Advance() { 28 if (array_pos_ >= len_) 29 return false; 30 31 array_pos_ = next_pos_; 32 char_pos_++; 33 if (next_pos_ < len_) 34 U8_NEXT(str_, next_pos_, len_, char_); 35 36 return true; 37 } 38 39 UTF16CharIterator::UTF16CharIterator(const string16* str) 40 : str_(reinterpret_cast<const char16*>(str->data())), 41 len_(str->size()), 42 array_pos_(0), 43 next_pos_(0), 44 char_pos_(0), 45 char_(0) { 46 if (len_) 47 ReadChar(); 48 } 49 50 UTF16CharIterator::UTF16CharIterator(const char16* str, size_t str_len) 51 : str_(str), 52 len_(str_len), 53 array_pos_(0), 54 next_pos_(0), 55 char_pos_(0), 56 char_(0) { 57 if (len_) 58 ReadChar(); 59 } 60 61 UTF16CharIterator::~UTF16CharIterator() { 62 } 63 64 bool UTF16CharIterator::Advance() { 65 if (array_pos_ >= len_) 66 return false; 67 68 array_pos_ = next_pos_; 69 char_pos_++; 70 if (next_pos_ < len_) 71 ReadChar(); 72 73 return true; 74 } 75 76 void UTF16CharIterator::ReadChar() { 77 // This is actually a huge macro, so is worth having in a separate function. 78 U16_NEXT(str_, next_pos_, len_, char_); 79 } 80 81 } // namespace i18n 82 } // namespace base 83
