// Copyright 2017 PDFium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com #include "core/fxcrt/cfx_utf8decoder.h" void CFX_UTF8Decoder::Clear() { m_Buffer.Clear(); m_PendingBytes = 0; } void CFX_UTF8Decoder::AppendCodePoint(uint32_t ch) { m_Buffer.AppendChar(static_cast<wchar_t>(ch)); } void CFX_UTF8Decoder::Input(uint8_t byte) { if (byte < 0x80) { m_PendingBytes = 0; m_Buffer.AppendChar(byte); } else if (byte < 0xc0) { if (m_PendingBytes == 0) { return; } m_PendingBytes--; m_PendingChar |= (byte & 0x3f) << (m_PendingBytes * 6); if (m_PendingBytes == 0) { AppendCodePoint(m_PendingChar); } } else if (byte < 0xe0) { m_PendingBytes = 1; m_PendingChar = (byte & 0x1f) << 6; } else if (byte < 0xf0) { m_PendingBytes = 2; m_PendingChar = (byte & 0x0f) << 12; } else if (byte < 0xf8) { m_PendingBytes = 3; m_PendingChar = (byte & 0x07) << 18; } else if (byte < 0xfc) { m_PendingBytes = 4; m_PendingChar = (byte & 0x03) << 24; } else if (byte < 0xfe) { m_PendingBytes = 5; m_PendingChar = (byte & 0x01) << 30; } }