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| 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 "third_party/icu/source/common/unicode/utf8.h" | |
| 8 #include "third_party/icu/source/common/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 | |
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