public override bool Write(ref UdpBitStream bitstream, Frame frame)
{
// Base class does some forceUpdate checking, keep it around.
bool forceUpdate = IsUpdateForced(frame);
ElementFrame e = frames[frame.frameid];
e.compXform = Compress();
e.xform = Localized;
CompressedElement newComp = e.compXform;
if (rotationType == RotationType.Quaternion)
{
// For frames between forced updates, we need to first send a flag bit for if this element is being sent
if (!forceUpdate)
{
bool hasChanged = newComp.quat != lastSentCompressed.quat && sendCullMask.OnChanges();
bitstream.WriteBool(hasChanged);
// if no changes have occured we are done.
if (!hasChanged)
{
return(false);
}
}
bitstream.WriteULong(newComp.quat, totalBitsForQuat);
lastSentCompressed.quat = newComp.quat;
lastSentTransform = e.xform;
return(true);
}
else
{
// For frames between forced updates, we need to first send a flag bit for if this element is being sent
if (!forceUpdate)
{
bool hasChanged = !CompressedElement.Compare(newComp, lastSentCompressed) && sendCullMask.OnChanges();
bitstream.WriteBool(hasChanged);
// if no changes have occured we are done.
if (!hasChanged)
{
return(false);
}
}
for (int axis = 0; axis < 3; axis++)
{
if (includedAxes.IsXYZ(axis))
{
bitstream.WriteUInt(newComp[axis], axes[axis].bits);
lastSentCompressed[axis] = newComp[axis];
}
}
return(true);
}
}
public static void Send(ref UdpBitStream bitstream, int updateCounter)
{
// If this is the server and it is due to ping... ping
//TODO this hard coded 60 will likely go.
//TODO this should probably be offset by 1 to keep frame zero from becoming massive with all the keyframes of NST
if (MasterNetAdapter.ServerIsActive && updateCounter % 20 == 0 && updateCounter != 60)
{
svrPingInitiateTime = Time.time;
bitstream.WriteBool(true);
}
// If this is a client, and it has rcvd a server ping, it needs to respond next tick.
else if (clientNeedsToRespondToPing)
{
bitstream.WriteBool(true);
// write how long the client waited to reply in ms (1023 ms max with 10 bits)
bitstream.WriteInt((int)((Time.time - clntPingArriveTime) * 1000), 10);
clientNeedsToRespondToPing = false;
}
// nothing happening this pass.
else
{
bitstream.WriteBool(false);
}
}
public byte[] Pack()
{
var data = new byte[1200];
var stream = new UdpBitStream(data, data.Length);
//stream.WriteInt(state.index, 32);
UdpBitStreamExt.WriteVector3(ref stream, state.position);
UdpBitStreamExt.WriteQuaternion(ref stream, state.rotation);
UdpBitStreamExt.WriteVector3(ref stream, state.velocity);
UdpBitStreamExt.WriteVector2(ref stream, movementInput);
UdpBitStreamExt.WriteVector2(ref stream, lookInput);
stream.WriteBool(jumpInput);
stream.WriteBool(shootInput);
return(data);
}
public bool Write(ref UdpBitStream bitstream, Frame frame)
{
ElementFrame e = frames[frame.frameid];
e.compXform = Compress();
e.xform = Localized;
CompressedElement newComp = e.compXform;
bool forceUpdate = IsUpdateForced(frame);
// For frames between forced updates, we need to first send a flag bit for if this element is being sent
if (!forceUpdate)
{
bool hasChanged = !CompressedElement.Compare(newComp, lastSentCompressed) && sendCullMask.OnChanges();
bitstream.WriteBool(hasChanged);
// if no changes have occured we are done.
if (!hasChanged)
{
return(false);
}
}
crusher.Write(e.compXform, bitstream.Data, ref bitstream.ptr);
lastSentCompressed = newComp;
lastSentTransform = e.xform;
return(true);
}
/// <summary>
/// Ping all owned NSTs for any due updates. Passes the bitstream to that NST to write to.
/// </summary>
public static void PollAllForUpdates()
{
//Debug.Log("<b><color=green>Mstr Ping</color></b> " + (Time.time - tempMasterPollTime));
//tempMasterPollTime = Time.time;
UdpBitStream bitstream = new UdpBitStream(bitstreamByteArray);
UdpBitStream outstream = new UdpBitStream();
bool foundUpdate = false;
for (int i = 0; i < NetworkSyncTransform.allNsts.Count; i++)
{
foundUpdate |= NetworkSyncTransform.allNsts[i].PollForUpdate(ref bitstream);
}
// No Updates, we are done.
if (!foundUpdate)
{
return;
}
// Write the end of stream marker of 00
bitstream.WriteBool(false);
mna.SendUpdate(ref bitstream, ref outstream);
//Debug.Log("<b><color=blue>Mstr Snd</color></b> " + (Time.time - tempMasterSendTime));
//tempMasterSendTime = Time.time;
}
public bool Write(ref UdpBitStream bitstream, Frame frame)
{
ElementFrame e = frames[frame.frameid];
CompressedElement compXform = e.compXform;
Compress(compXform);
e.xform = Decompress(compXform); // Localized;
/// Experimental - Apply the outgoing lossy values to the GhostGO so owner/authority of object can use it to replicate lossy events like weapon fire.
if (ghostGO)
{
Apply(e.xform, ghostGO);
}
if (!nstElement.Enabled)
{
bitstream.WriteBool(false);
return(false);
}
bool forceUpdate = IsUpdateForced(frame);
// For frames between forced updates, we need to first send a flag bit for if this element is being sent
if (!forceUpdate)
{
bool hasChanged = !compXform.Equals(lastSentCompressed) && sendCullMask.OnChanges();
bitstream.WriteBool(hasChanged);
// if no changes have occured we are done.
if (!hasChanged)
{
return(false);
}
}
else
{
bitstream.WriteBool(true);
}
crusher.Write(compXform, bitstream.Data, ref bitstream.ptr);
lastSentCompressed.CopyFrom(compXform);
lastSentTransform = e.xform;
return(true);
}
public void MirrorToClients(ref UdpBitStream outstream, Frame frame, bool hasChanged)
{
//// Write the used flag (if this is not a forced update) and determine if an update needs to be written.
//if (WriteUpdateFlag(ref outstream, frame, hasChanged) == false)
// return;
outstream.WriteBool(hasChanged);
if (!hasChanged)
{
return;
}
ElementFrame e = frames[frame.frameid];
crusher.Write(e.compXform, outstream.Data, ref outstream.ptr);
}
/// <summary>
/// Write the flag bool if this is not a forced update, and return true if the element should be written to the stream (the value of the flag).
/// </summary>
protected bool WriteUpdateFlag(ref UdpBitStream outstream, Frame frame, bool hasChanged)
{
bool forcedUpdate = IsUpdateForced(frame);
// For non-forced updates we need to set the used flag.
if (!forcedUpdate)
{
outstream.WriteBool(hasChanged);
}
// exit if we are not writing a compressed value.
if (!hasChanged && !forcedUpdate)
{
return(false);
}
return(true);
}
/// <summary>
/// Ping all owned NSTs for any due updates (fires on network ticks, generated by the NSTMaster FixedUpdate()). Passes the bitstream to that NST.
/// </summary>
public static bool PollAllForNSTUpdates(ref UdpBitStream bitstream, List <NetworkSyncTransform> nsts, int updateCounter, bool isOfftick)
{
if (!MasterNetAdapter.ServerIsActive && !MasterNetAdapter.ClientIsActive)
{
return(false);
}
bool foundUpdate = false;
int count = nsts.Count;
for (int i = 0; i < count; ++i)
{
foundUpdate |= nsts[i].PollForUpdate(ref bitstream, updateCounter, isOfftick);
}
// Write the end of stream marker of 00
bitstream.WriteBool(false);
IntegrityCheck.WriteCheck(ref bitstream);
return(foundUpdate);
}
public static void Rcv(ref UdpBitStream bitstream, ref UdpBitStream outstream, bool mirror, int clientId)
{
bool isPing = bitstream.ReadBool();
// if this is a ping from a client, a time delta should follow (mirror means this is the server, and this pass is the server pass)
if (isPing && mirror && clientId != MasterNetAdapter.MasterClientId)
{
float clientHeldTime = .001f * bitstream.ReadInt(10);
float rtt = (Time.time - svrPingInitiateTime) - clientHeldTime;
if (RTT.ContainsKey(clientId))
{
RTT[clientId] = RTT[clientId] * OLD_SAMP_WEIGHT + rtt * NEW_SAMP_WEIGHT;
}
else
{
RTT.Add(clientId, rtt);
}
//Debug.Log(
DebugX.Log(!DebugX.logInfo ? null :
"MasterRTT ping result " + clientId + " <b>" + RTT[clientId] + " </b> plus " + clientHeldTime + " of client waiting for next outgoing tick.");
}
// this is a dumb client and it just got a ping from server
else if (isPing && !MasterNetAdapter.ServerIsActive)
{
clientNeedsToRespondToPing = true;
clntPingArriveTime = Time.time;
}
// We don't mirror out pings. The conversation is strictly Server > Player > Server
if (mirror)
{
outstream.WriteBool(false);
}
}
/// <summary>
/// Reads update headers for each NST frame update in the incoming bitstream, and passes the bitstream to that NST to read out its
/// update information.
/// </summary>
/// <param name="mirror">True if this is the server, and this is the incoming bitstream. Tells the server that the outstream
/// needs to be populated for retransmission to all clients. Also false if this is the server running its own outgoing update.</param>
public static void ReceiveUpdate(ref UdpBitStream bitstream, ref UdpBitStream outstream, bool mirror, int senderId)
{
// Create a new bitstream to ensure ptr is at 0. Same data as master though.
bitstream.ptr = 0;
int frameid = bitstream.ReadInt(6);
if (mirror)
{
outstream.WriteInt(frameid, 6);
}
bool isOfftick = frameid == 60;
// remove this safety once working
//TEST
int safety = 0;
UpdateType updateType;
do
{
safety++;
BandwidthUsage.Start(ref bitstream, BandwidthLogType.UpdateRcv);
//stop looking when header is EOS
bool notEOS = bitstream.ReadBool();
int mirrorUpdateStartPtr = outstream.ptr;
BandwidthUsage.AddUsage(ref bitstream, "NotEOS");
if (mirror)
{
outstream.WriteBool(notEOS);
}
if (!notEOS)
{
break;
}
// First three bits are the msgtype
//TODO this might only need to be two
updateType = (UpdateType)bitstream.ReadInt(3);
BandwidthUsage.AddUsage(ref bitstream, "UpdateType");
int updateBitstreamPos = outstream.ptr;
if (mirror)
{
outstream.WriteInt((int)updateType, 3);
}
// Next variable is the NstId - get it to know where to send the rest of the bitstream
uint nstid = bitstream.ReadUInt(HeaderSettings.single.BitsForNstId);
BandwidthUsage.AddUsage(ref bitstream, "NstId");
if (mirror)
{
outstream.WriteUInt(nstid, HeaderSettings.single.BitsForNstId);
}
lastNST = NSTTools.GetNstFromId(nstid);
BandwidthUsage.SetName(lastNST);
int updatelength = bitstream.ReadInt(UPDATELENGTH_BYTE_COUNT_SIZE);
if (mirror)
{
outstream.WriteInt(updatelength, UPDATELENGTH_BYTE_COUNT_SIZE);
}
BandwidthUsage.AddUsage(ref bitstream, "DataLength");
//Note the starting pos in stream
int bodyPtr = bitstream.ptr;
// The start pos for modifying update lenght for mirror
int mirrorBodyPtr = outstream.ptr;
// This mising NST handler is NOT FULLY TESTED. Uses the updatelength value to jump ahead in the bitstream if the NST it is
// addressed to doesn't exist for some reason.
if (lastNST == null)
{
//DebugX.LogWarning(!DebugX.logWarnings ? null :
DebugX.Log(
("Message for an NST Object " + nstid + " arrived but that object does not exist. (yet/anymore?) This is normal during startup and shutdown."));
// Forward to the next update start in the incoming stream.
bitstream.ptr = bodyPtr + (updatelength << 3);
// rewind to the EOS marker and pretend this arrival never occured for the outgoing mirror stream.
outstream.ptr = mirrorUpdateStartPtr;
continue;
}
// Tell this nst to read its mail. updateType may get modified by server receive for things like teleport.
Frame frame = lastNST.ReadUpdate(ref bitstream, ref outstream, frameid, isOfftick, updateType, updatelength, mirror);
updateType = frame.updateType;
// overwrite the updateType of the server outgoing in case it has changed.
if (mirror)
{
outstream.WriteIntAtPos((int)updateType, 3, updateBitstreamPos);
}
//Advance ptr to next update in stream by force, in case the last update wasn't read for any reason (such as the NST leaving the game)
bitstream.ptr = bodyPtr + (updatelength << 3);
// write the update byte length for the mirror (not the same value as the incoming due to server side adjustments)
if (mirror)
{
int holdPos = outstream.ptr;
outstream.ptr = mirrorBodyPtr - UPDATELENGTH_BYTE_COUNT_SIZE;
// get the bytesused rounded up.
int bytes = ((holdPos - mirrorBodyPtr) >> 3) + (((holdPos - mirrorBodyPtr) % 8 == 0) ? 0 : 1);
outstream.WriteInt(bytes, UPDATELENGTH_BYTE_COUNT_SIZE);
outstream.ptr = mirrorBodyPtr + (bytes << 3);
}
} while (safety < 100);
/// NST updates are finished - any data to append to the master update can go here
IntegrityCheck.ReadCheck(ref bitstream, ref outstream, "End of All Update Reads", mirror);
MasterRTT.Rcv(ref bitstream, ref outstream, mirror, senderId);
BandwidthUsage.AddUsage(ref bitstream, "RTT checks");
// Very last thing... report the bits that were used. This is conditional to the editor only
BandwidthUsage.ReportMasterBits(ref bitstream, BandwidthLogType.MasterIn);
}
public override void WriteToBitstream(ref UdpBitStream bitstream, MsgType msgType, bool forceUpdate, bool isKeyframe)
{
// Base class does some forceUpdate checking, keep it around.
//forceUpdate = base.WriteToBitstream(ref bitstream, msgType, forceUpdate);
//bool hasChanged = false;
if (rotationType == XType.Quaternion)
{
ulong compressedQuat = QuatCompress.CompressQuatToBitsBuffer(Localized, totalBitsForQuat);
// For frames between forced updates, we need to first send a flag bit for if this element is being sent
if (!forceUpdate)
{
bool hasChanged = compressedQuat != lastSentCompressed;
bitstream.WriteBool(hasChanged);
// if no changes have occured we are done.
if (!hasChanged)
{
return;
}
}
bitstream.WriteULong(compressedQuat, totalBitsForQuat);
lastSentCompressed = compressedQuat;
return;
}
else
{
// Euler types...
CompressedElement newValues = new CompressedElement(0, 0, 0);
// populate the new compressed position, and test if any of the axes have changed.
for (int axis = 0; axis < 3; axis++)
{
if (rotationType.IsXYZ(axis))
{
newValues[axis] = CompressFloat(((Vector3)Localized)[axis], axis);
}
}
// For frames between forced updates, we need to first send a flag bit for if this element is being sent
if (!forceUpdate)
{
bool hasChanged = !CompressedElement.Compare(newValues, lastSentCompressed);
bitstream.WriteBool(hasChanged);
// if no changes have occured we are done.
if (!hasChanged)
{
return;
}
}
for (int axis = 0; axis < 3; axis++)
{
if (rotationType.IsXYZ(axis))
{
bitstream.WriteUInt(newValues[axis], xyzBits[axis]);
lastSentCompressed[axis] = newValues[axis];
}
}
}
}
/// <summary>
/// Reads update headers for each NST frame update in the incoming bitstream, and passes the bitstream to that NST to read out its
/// update information.
/// </summary>
/// <param name="mirror">True if this is the server, and this is the incoming bitstream. Tells the server that the outstream
/// needs to be populated for retransmission to all clients. Also false if this is the server running its own outgoing update.</param>
public static void ReceiveUpdate(ref UdpBitStream bitstream, ref UdpBitStream outstream, bool mirror, int senderId)
{
// Create a new bitstream to ensure ptr is at 0. Same data as master though.
bitstream.ptr = 0;
int frameid = bitstream.ReadInt(6);
if (mirror)
{
outstream.WriteInt(frameid, 6);
}
bool isOfftick = frameid == FRAME_COUNT;
int sceneIndex = NSTSceneManager.Deserialize(ref bitstream, ref outstream, mirror);
bool sceneOutOfSync = HeaderSettings.single.includeSceneIndex && sceneIndex != NSTSceneManager.CurrentSceneIndex;
if (sceneOutOfSync)
{
Debug.LogWarning(frameid + " Out of sync " + sceneIndex + " " + NSTSceneManager.CurrentSceneIndex);
}
// remove this safety once working
//TEST
int safety = 0;
UpdateType updateType;
do
{
safety++;
BandwidthUsage.Start(ref bitstream, BandwidthLogType.UpdateRcv);
//stop looking when header is EOS
bool notEOS = bitstream.ReadBool();
int mirrorUpdateStartPtr = outstream.ptr;
BandwidthUsage.AddUsage(ref bitstream, "NotEOS");
if (mirror)
{
outstream.WriteBool(notEOS);
}
if (!notEOS)
{
break;
}
// First three bits are the msgtype
//TODO this might only need to be two
updateType = (UpdateType)bitstream.ReadInt(3);
BandwidthUsage.AddUsage(ref bitstream, "UpdateType");
int updateBitstreamPos = outstream.ptr;
if (mirror)
{
outstream.WriteInt((int)updateType, 3);
}
// Next variable is the NstId - get it to know where to send the rest of the bitstream
uint nstid = bitstream.ReadUInt(HeaderSettings.single.BitsForNstId);
BandwidthUsage.AddUsage(ref bitstream, "NstId");
if (mirror)
{
outstream.WriteUInt(nstid, HeaderSettings.single.BitsForNstId);
}
lastNST = NSTTools.GetNstFromId(nstid);
BandwidthUsage.SetName(lastNST);
int updatelength = bitstream.ReadInt(UPDATELENGTH_BYTE_COUNT_SIZE);
if (mirror)
{
outstream.WriteInt(updatelength, UPDATELENGTH_BYTE_COUNT_SIZE);
}
BandwidthUsage.AddUsage(ref bitstream, "DataLength");
//Note the starting pos in stream
int bodyPtr = bitstream.ptr;
// The start pos for modifying update lenght for mirror
int mirrorBodyPtr = outstream.ptr;
XDebug.LogWarning(!XDebug.logWarnings ? null :
("Incoming Update for nstid: " + nstid + " was from a different scene. Ignoring update to avoid data corruption due to different compression settings."), sceneOutOfSync);
XDebug.Log(!XDebug.logInfo ? null :
//Debug.Log(
("Message for an NST Object " + nstid + " arrived but that object does not exist. (yet/anymore?) This is normal during startup and shutdown."), lastNST == null);
/// Skip reading if the target NST doesn't exist, or if this we compressed with a different scene (codec mismatch likely)
if (lastNST == null || sceneOutOfSync)
{
if (sceneOutOfSync)
{
Debug.LogWarning(frameid + " skipped entirely due to sceneID mismatch");
}
// Forward to the next update start in the incoming stream.
bitstream.ptr = bodyPtr + (updatelength << 3);
// rewind to the EOS marker and pretend this arrival never occured for the outgoing mirror stream.
if (mirror)
{
/// TODO : Rather than jump ahead, Server should bulk copy the ignored data to outstream in case other clients can use it.
outstream.ptr = mirrorUpdateStartPtr;
}
continue;
}
// Tell this nst to read its mail. updateType may get modified by server receive for things like teleport.
Frame frame = lastNST.ReadUpdate(ref bitstream, ref outstream, frameid, isOfftick, updateType, updatelength, sceneIndex, sceneOutOfSync, mirror);
updateType = frame.updateType;
// overwrite the updateType of the server outgoing in case it has changed.
if (mirror)
{
outstream.WriteIntAtPos((int)updateType, 3, updateBitstreamPos);
}
//Advance ptr to next update in stream by force, in case the last update wasn't read for any reason (such as the NST leaving the game)
bitstream.ptr = bodyPtr + (updatelength << 3);
// write the update byte length for the mirror (not the same value as the incoming due to server side adjustments)
if (mirror)
{
int holdPos = outstream.ptr;
outstream.ptr = mirrorBodyPtr - UPDATELENGTH_BYTE_COUNT_SIZE;
// get the bytesused rounded up.
int bytes = ((holdPos - mirrorBodyPtr) >> 3) + (((holdPos - mirrorBodyPtr) % 8 == 0) ? 0 : 1);
outstream.WriteInt(bytes, UPDATELENGTH_BYTE_COUNT_SIZE);
outstream.ptr = mirrorBodyPtr + (bytes << 3);
}
} while (safety < 100);
/// NST updates are finished - any data to append to the master update can go here
IntegrityCheck.ReadCheck(ref bitstream, ref outstream, "End of All Update Reads", mirror);
if (!isOfftick)
{
MasterRTT.Rcv(ref bitstream, ref outstream, mirror, senderId);
}
BandwidthUsage.AddUsage(ref bitstream, "RTT checks");
// Very last thing... report the bits that were used. This is conditional to the editor only
BandwidthUsage.ReportMasterBits(ref bitstream, BandwidthLogType.MasterIn);
}
/// <summary>
/// Reads update headers for each NST frame update in the incoming bitstream, and passes the bitstream to that NST to read out its
/// update information.
/// </summary>
/// <param name="mirror">True if this is the server, and this is the incoming bitstream. Tells the server that the outstream
/// needs to be populated for retransmission to all clients. Also false if this is the server running its own outgoing update.</param>
public static void ReceiveUpdate(ref UdpBitStream bitstream, ref UdpBitStream outstream, bool mirror)
{
// Create a new bitstream to ensure ptr is at 0. Same data as master though.
bitstream.Ptr = 0;
// remove this safety once working
//TEST
int safety = 0;
UpdateType updateType;
do
{
safety++;
BandwidthUsage.Start(ref bitstream, BandwidthLogType.UpdateRcv);
//stop looking when header is EOS
bool notEOS = bitstream.ReadBool();
int mirrorUpdateStartPtr = outstream.Ptr;
BandwidthUsage.AddUsage(ref bitstream, "NotEOS");
if (mirror)
{
outstream.WriteBool(notEOS);
}
if (!notEOS)
{
break;
}
// First three bits are the msgtype
//TODO this might only need to be two
updateType = (UpdateType)bitstream.ReadInt(3);
BandwidthUsage.AddUsage(ref bitstream, "UpdateType");
int updateBitstreamPos = outstream.Ptr;
if (mirror)
{
outstream.WriteInt((int)updateType, 3);
}
// Next variable is the NstId - get it to know where to send the rest of the bitstream
uint nstid = bitstream.ReadUInt(NSTSettings.single.bitsForNstId);
BandwidthUsage.AddUsage(ref bitstream, "NstId");
if (mirror)
{
outstream.WriteUInt(nstid, NSTSettings.single.bitsForNstId);
}
NetworkSyncTransform nst = NetworkSyncTransform.GetNstFromId(nstid);
BandwidthUsage.SetName(nst);
int updatelength = bitstream.ReadInt(UPDATELENGTH_BYTE_COUNT_SIZE);
if (mirror)
{
outstream.WriteInt(updatelength, UPDATELENGTH_BYTE_COUNT_SIZE);
}
BandwidthUsage.AddUsage(ref bitstream, "DataLength");
//Note the starting pos in stream
int bodyPtr = bitstream.Ptr;
// The start pos for modifying update lenght for mirror
int mirrorBodyPtr = outstream.Ptr;
// This mising NST handler is NOT FULLY TESTED. Uses the updatelength value to jump ahead in the bitstream if the NST it is
// addressed to doesn't exist for some reason.
if (nst == null)
{
DebugX.LogWarning(!DebugX.logWarnings ? "" : ("Message for an NST Object arrived but that object does not exist."));
// Forward to the next update start in the incoming stream.
bitstream.Ptr = bodyPtr + (updatelength << 3);
// rewind to the EOS marker and pretend this arrival never occured for the outgoing mirror stream.
outstream.Ptr = mirrorUpdateStartPtr;
continue;
}
// Tell this nst to read its mail. updateType may get modified by server receive for things like teleport.
updateType = nst.ReceieveGeneric(ref bitstream, ref outstream, updateType, updatelength, mirror);
// overwrite the updateType of the server outgoing in case it has changed.
if (mirror)
{
outstream.WriteIntAtPos((int)updateType, 3, updateBitstreamPos);
}
//Advance ptr to next update in stream by force, in case the last update wasn't read for any reason (such as the NST leaving the game)
bitstream.Ptr = bodyPtr + (updatelength << 3);
// write the update byte length for the mirror (not the same value as the incoming due to server side adjustments)
if (mirror)
{
int holdPos = outstream.Ptr;
outstream.Ptr = mirrorBodyPtr - UPDATELENGTH_BYTE_COUNT_SIZE;
// get the bytesused rounded up.
int bytes = ((holdPos - mirrorBodyPtr) >> 3) + (((holdPos - mirrorBodyPtr) % 8 == 0) ? 0 : 1);
outstream.WriteInt(bytes, UPDATELENGTH_BYTE_COUNT_SIZE);
outstream.Ptr = mirrorBodyPtr + (bytes << 3);
}
} while (safety < 100);
}