Method operator()

LuaSTGPlus/UnicodeStringEncoding.cpp:13–77

	char32_t m_incpChar = 0;
public:
	bool operator() (uint8_t input, char32_t& output)
	{
		// ״̬��
		if (m_iState == 0)
		{
			// ǰ���ֽ�
			if (input >= 0xFCu && input <= 0xFDu)  // UCS4 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
			{
				m_incpChar = input & 0x01u;
				m_iState = 5;
			}
			else if (input >= 0xF8u && input <= 0xFBu) // UCS4 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
			{
				m_incpChar = input & 0x03u;
				m_iState = 4;
			}
			else if (input >= 0xF0u && input <= 0xF7u) // UCS4 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
			{
				m_incpChar = input & 0x07u;
				m_iState = 3;
			}
			else if (input >= 0xE0u && input <= 0xEFu) // 0800~FFFF: 1110xxxx 10xxxxxx 10xxxxxx
			{
				m_incpChar = input & 0x0Fu;
				m_iState = 2;
			}
			else if (input >= 0xC0u && input <= 0xDFu) // 0080~07FF: 110xxxxx 10xxxxxx
			{
				m_incpChar = input & 0x1Fu;
				m_iState = 1;
			}
			else if (/*input >= 0x00u &&*/ input <= 0x7Fu) // 0000~007F: 0xxxxxxx
			{
				m_incpChar = input;
				m_iState = 0;
			}
			else
			{
				m_incpChar = (char32_t)'?';
				m_iState = 0;
			}
		}
		else
		{
			if (input >= 0x80u && input <= 0xBFu)
			{
				m_incpChar = (m_incpChar << 6) | (input & 0x3Fu);
				--m_iState;
			}
			else
			{
				m_incpChar = (char32_t)'?';
				m_iState = 0;
			}
		}

		// ���
		if (m_iState == 0)