15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2011 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/i18n/char_iterator.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch#include "third_party/icu/source/common/unicode/utf8.h" 8ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch#include "third_party/icu/source/common/unicode/utf16.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace i18n { 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)UTF8CharIterator::UTF8CharIterator(const std::string* str) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : str_(reinterpret_cast<const uint8_t*>(str->data())), 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) len_(str->size()), 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) array_pos_(0), 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) next_pos_(0), 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char_pos_(0), 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char_(0) { 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (len_) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) U8_NEXT(str_, next_pos_, len_, char_); 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)UTF8CharIterator::~UTF8CharIterator() { 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool UTF8CharIterator::Advance() { 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (array_pos_ >= len_) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) array_pos_ = next_pos_; 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char_pos_++; 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (next_pos_ < len_) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) U8_NEXT(str_, next_pos_, len_, char_); 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)UTF16CharIterator::UTF16CharIterator(const string16* str) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : str_(reinterpret_cast<const char16*>(str->data())), 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) len_(str->size()), 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) array_pos_(0), 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) next_pos_(0), 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char_pos_(0), 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char_(0) { 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (len_) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ReadChar(); 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)UTF16CharIterator::UTF16CharIterator(const char16* str, size_t str_len) 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : str_(str), 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) len_(str_len), 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) array_pos_(0), 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) next_pos_(0), 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char_pos_(0), 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char_(0) { 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (len_) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ReadChar(); 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)UTF16CharIterator::~UTF16CharIterator() { 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool UTF16CharIterator::Advance() { 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (array_pos_ >= len_) 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) array_pos_ = next_pos_; 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char_pos_++; 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (next_pos_ < len_) 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ReadChar(); 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void UTF16CharIterator::ReadChar() { 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This is actually a huge macro, so is worth having in a separate function. 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) U16_NEXT(str_, next_pos_, len_, char_); 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace i18n 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 83