Function descToUTF8

src/jrd/trace/TraceObjects.cpp:64–116

Convert text descriptor into UTF8 string. Binary data converted into HEX representation.

// Convert text descriptor into UTF8 string.
// Binary data converted into HEX representation.
bool descToUTF8(const dsc* param, string& result)
{
	UCHAR* address;
	USHORT length;

	switch (param->dsc_dtype)
	{
	case dtype_text:
		address = param->dsc_address;
		length = param->dsc_length;
		break;

	case dtype_varying:
		address = param->dsc_address + sizeof(USHORT);
		length = *(USHORT*) param->dsc_address;
		fb_assert(length <= param->dsc_length - 2);
		break;

	default:
		return false;
	}

	if (param->getCharSet() == CS_BINARY)
	{
		// Convert OCTETS and [VAR]BINARY to HEX string

		char* hex = result.getBuffer(length * 2);

		for (const UCHAR* p = address; p < address + length; p++)
		{
			UCHAR c = (*p & 0xF0) >> 4;
			*hex++ = c + (c < 10 ? '0' : 'A' - 10);

			c = (*p & 0x0F);
			*hex++ = c + (c < 10 ? '0' : 'A' - 10);
		}
		return result.c_str();
	}

	string src(address, length);

	try
	{
		if (!Jrd::DataTypeUtil::convertToUTF8(src, result, param->dsc_sub_type, status_exception::raise))
			result = src;
	}
	catch (const Firebird::Exception&)
	{
		result = src;
	}

	return true;
}

} // namespace