Method getSlice

src/remote/client/interface.cpp:5796–5874

int Attachment::getSlice(CheckStatusWrapper* status, ITransaction* apiTra, ISC_QUAD* array_id,
						  unsigned int sdl_length, const unsigned char* sdl,
						  unsigned int param_length, const unsigned char* param,
						  int slice_length, unsigned char* slice)
{
/**************************************
 *
 *	g d s _ g e t _ s l i c e
 *
 **************************************
 *
 * Functional description
 *	Snatch a slice of an array.
 *
 **************************************/
	try
	{
		reset(status);

		CHECK_HANDLE(rdb, isc_bad_db_handle);
		rem_port* port = rdb->rdb_port;
		RefMutexGuard portGuard(*port->port_sync, FB_FUNCTION);

		Rtr* transaction = remoteTransaction(apiTra);
		CHECK_HANDLE(transaction, isc_bad_trans_handle);

		// Validate data length

		CHECK_LENGTH(port, sdl_length);
		CHECK_LENGTH(port, param_length);

		// Parse the sdl in case blr_d_float must be converted to blr_double

		const UCHAR* new_sdl = sdl;

		// CVC: Modified this horrible idea: don't touch input parameters!
		// The modified (perhaps) sdl is send to the remote connection.  The
		// original sdl is used to process the slice data when it is received.
		// (This is why both 'new_sdl' and 'sdl' are saved in the packet.)
		HalfStaticArray<UCHAR, 128> sdl_buffer;
		UCHAR* old_sdl = sdl_buffer.getBuffer(sdl_length);
		memcpy(old_sdl, sdl, sdl_length);

		PACKET* packet = &rdb->rdb_packet;
		packet->p_operation = op_get_slice;
		P_SLC* data = &packet->p_slc;
		data->p_slc_transaction = transaction->rtr_id;
		data->p_slc_id = *array_id;
		data->p_slc_length = slice_length;
		data->p_slc_sdl.cstr_length = sdl_length;
		data->p_slc_sdl.cstr_address = const_cast<UCHAR*>(new_sdl);
		data->p_slc_parameters.cstr_length = param_length;
		data->p_slc_parameters.cstr_address = const_cast<UCHAR*>(param);

		data->p_slc_slice.lstr_length = 0;
		data->p_slc_slice.lstr_address = slice;

		P_SLR* response = &packet->p_slr;