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#include "UnityPrefix.h"
#include "NetworkViewID.h"
#if ENABLE_NETWORK
#include "Runtime/Serialize/SwapEndianBytes.h"
enum {
k4Bits = (1 << 4) - 1,
k10Bits = (1 << 10) - 1,
k14Bits = (1 << 14) - 1,
k15Bits = (1 << 15) - 1,
k29Bits = (1 << 29) - 1
};
void NetworkViewID::Write (RakNet::BitStream& stream)
{
UInt32 endianSceneID = m_ID;
UInt32 endianLevelPrefix = m_LevelPrefix;
#if UNITY_BIG_ENDIAN
SwapEndianBytes(endianSceneID);
SwapEndianBytes(endianLevelPrefix);
#endif
if (m_Type == kAllocatedID)
{
// 16 bit mode
if (m_ID <= k14Bits)
{
stream.Write0();// 16 bit mode
stream.Write1();// allocated
stream.WriteBits(reinterpret_cast<UInt8*>(&endianSceneID), 14);
}
// 32 bit mode
else if (m_ID <= k29Bits)
{
stream.Write1();// 32 bit mode
stream.Write0();// 32 bit mode
stream.Write1();// allocated
stream.WriteBits(reinterpret_cast<UInt8*>(&endianSceneID), 29);
}
// 64 bit mode
else
{
AssertString("64 bit mode not supported yet");
}
}
else
{
// 16 bit mode
if (m_ID <= k10Bits && m_LevelPrefix <= k4Bits)
{
stream.Write0();// 16 bit mode
stream.Write0();// allocated
stream.WriteBits(reinterpret_cast<UInt8*>(&endianLevelPrefix), 4);
stream.WriteBits(reinterpret_cast<UInt8*>(&endianSceneID), 10);
}
// 32 bit mode
else if (m_ID <= k14Bits && m_LevelPrefix <= k15Bits)
{
stream.Write1();// 32 bit mode
stream.Write0();// 32 bit mode
stream.Write0();// allocated
stream.WriteBits(reinterpret_cast<UInt8*>(&endianLevelPrefix), 15);
stream.WriteBits(reinterpret_cast<UInt8*>(&endianSceneID), 14);
}
// 64 bit mode
else
{
AssertString("64 bit mode not supported yet");
}
}
}
bool NetworkViewID::Read (RakNet::BitStream& stream)
{
m_ID = 0;
m_LevelPrefix = 0;
m_Type = 0;
if (stream.GetNumberOfUnreadBits() < 16)
return false;
int size = 16;
int bitsRead = 1;
if (stream.ReadBit())
{
size = 32;
bitsRead++;
if (stream.ReadBit())
size = 64;
if (stream.GetNumberOfUnreadBits() < size-bitsRead)
{
AssertString(Format("Only %d bits left, but expected %d\n", stream.GetNumberOfUnreadBits(), size-bitsRead));
return false;
}
}
bool isAllocated = stream.ReadBit();
if (isAllocated)
{
m_Type = kAllocatedID;
if (size == 16)
stream.ReadBits(reinterpret_cast<UInt8*>(&m_ID), 14);
else if (size == 32)
stream.ReadBits(reinterpret_cast<UInt8*>(&m_ID), 29);
else
AssertString("Unsupported allocated view ID size");
}
else
{
m_Type = kSceneID;
if (size == 16)
{
stream.ReadBits(reinterpret_cast<UInt8*>(&m_LevelPrefix), 4);
stream.ReadBits(reinterpret_cast<UInt8*>(&m_ID), 10);
}
else if (size == 32)
{
stream.ReadBits(reinterpret_cast<UInt8*>(&m_LevelPrefix), 15);
stream.ReadBits(reinterpret_cast<UInt8*>(&m_ID), 14);
}
else
{
AssertString("Unsupported scene view ID size");
}
}
#if UNITY_BIG_ENDIAN
SwapEndianBytes(m_LevelPrefix);
SwapEndianBytes(m_ID);
#endif
return true;
}
void NetworkViewID::SetSceneID (UInt32 sceneID)
{
m_Type = kSceneID;
m_LevelPrefix = 0;
m_ID = sceneID;
}
void NetworkViewID::SetAllocatedID (UInt32 sceneID)
{
m_Type = kAllocatedID;
m_LevelPrefix = 0;
m_ID = sceneID;
}
void NetworkViewID::ReplaceLevelPrefix (UInt32 levelPrefix)
{
AssertIf(m_Type != kSceneID);
m_LevelPrefix = levelPrefix;
}
bool operator < (const NetworkViewID& lhs, const NetworkViewID& rhs)
{
if (lhs.m_ID != rhs.m_ID)
return lhs.m_ID < rhs.m_ID;
else
{
if (lhs.m_LevelPrefix != rhs.m_LevelPrefix)
return lhs.m_LevelPrefix < rhs.m_LevelPrefix;
else
return lhs.m_Type < rhs.m_Type;
}
}
std::string NetworkViewID::ToString () const
{
char buffer[128];
if (m_Type == kSceneID)
sprintf(buffer, "SceneID: %lu Level Prefix: %lu", m_ID, m_LevelPrefix);
else
sprintf(buffer, "AllocatedID: %ld", m_ID);
return buffer;
}
bool operator == (const NetworkViewID& lhs, const NetworkViewID& rhs)
{
return lhs.m_ID == rhs.m_ID && lhs.m_LevelPrefix == rhs.m_LevelPrefix && lhs.m_Type == rhs.m_Type;
}
bool operator != (const NetworkViewID& lhs, const NetworkViewID& rhs)
{
return lhs.m_ID != rhs.m_ID || lhs.m_LevelPrefix != rhs.m_LevelPrefix || lhs.m_Type != rhs.m_Type;
}
#endif
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