/* * Copyright (C) 2013 Igalia S.L. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY IGALIA AND ITS CONTRIBUTORS "AS IS" AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef UTF16UChar32Iterator_h #define UTF16UChar32Iterator_h namespace WebCore { class UTF16UChar32Iterator { WTF_MAKE_NONCOPYABLE(UTF16UChar32Iterator); public: UTF16UChar32Iterator(const UChar* buffer, unsigned bufferLength) : m_buffer(buffer) , m_bufferLength(bufferLength) , m_currentOffset(0) { } static UChar32 end() { return static_cast<UChar32>(-1); } UChar32 next() { if (m_currentOffset >= m_bufferLength) return end(); const UChar32 character = m_buffer[m_currentOffset++]; if (U16_IS_SURROGATE_LEAD(character) && m_currentOffset != m_bufferLength && U16_IS_TRAIL(m_buffer[m_currentOffset])) { return U16_GET_SUPPLEMENTARY(character, m_buffer[m_currentOffset++]); } return character; } private: const UChar* m_buffer; unsigned m_bufferLength; unsigned m_currentOffset; }; } // namespace WebCore #endif // UTF16UChar32Iterator_h