Method ExtractString

cpp/src/command_classes/NodeNaming.cpp:398–468

----------------------------------------------------------------------------- Extract a string from the report data -----------------------------------------------------------------------------

// Extract a string from the report data
//-----------------------------------------------------------------------------
string OpenZWave::ExtractString
(
	uint8 const* _data,
	uint32 const _length
)
{
	uint8 i;
	char str[32];
	uint32 pos = 0;

	str[0] = 0;
	StringEncoding encoding = (StringEncoding)( _data[1] & 0x07 );

	if( _length >= 3 )
	{
		// Get the length of the string (maximum allowed is 16 bytes)
		uint8 numBytes = _length - 3;
		if( numBytes > 16 )
		{
			numBytes = 16;
		}

		switch( encoding )
		{
			case StringEncoding_ASCII:
			{
				// Copy data as-is
				for( i=0; i<numBytes; ++i )
				{
					str[pos++] = _data[i+2];
				}
				break;
			}
			case StringEncoding_ExtendedASCII:
			{
				// Convert Extended ASCII characters to UTF-8
				for( i=0; i<numBytes; ++i )
				{
					uint8 ch = _data[i+2];
					if( ch >= 0x80 )
					{
						uint16 utf16 = c_extendedAsciiToUnicode[ch-0x80];
						pos = ConvertUFT16ToUTF8( utf16, str, pos );
					}
					else
					{
						str[pos++] = (char)ch;
					}
				}
				break;
			}
			case StringEncoding_UTF16:
			{
				// Convert UTF-16 characters to UTF-8
				for( i=0; i<numBytes; i+=2 )
				{
					uint16 utf16 = (((uint16)_data[i+2])<<8) | (uint16)_data[i+3];
					pos = ConvertUFT16ToUTF8( utf16, str, pos );