CSSZombieEscape/demboyz
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Code cleanup

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This commit is contained in:
Jordan Cristiano 2015-05-03 22:40:41 -04:00
parent 066b9fe269
commit 271a22f148
3 changed files with 205 additions and 162 deletions
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112
demboyz/demboyz.cpp
View File

@ -8,31 +8,63 @@
void ParsePacket(const std::vector<unsigned char>& packet)
{
assert(packet.size() <= NET_MAX_PAYLOAD);
CBitRead bitBuf(packet.data(), packet.size());
while (bitBuf.GetNumBitsLeft() >= NETMSG_TYPE_BITS)
CBitRead bitbuf(packet.data(), packet.size());
while (bitbuf.GetNumBitsLeft() >= NETMSG_TYPE_BITS)
{
uint32 typeId = bitBuf.ReadUBitLong(NETMSG_TYPE_BITS);
uint32 typeId = bitbuf.ReadUBitLong(NETMSG_TYPE_BITS);
printf("%i\n", typeId);
ProcessNetMsg(typeId, bitBuf);
ProcessNetMsg(typeId, bitbuf);
}
}
void ParseSignonData(const std::vector<unsigned char>& signonData)
void ParseDemoSequence(const std::vector<unsigned char>& sequenceData)
{
CBitRead bitbuf(signonData.data(), signonData.size());
const char cmd = bitbuf.ReadChar();
assert(cmd == dem_signon);
const int32 tick = bitbuf.ReadLong();
bitbuf.SeekRelative(sizeof(democmdinfo_t) * 8);
const int32 seq1 = bitbuf.ReadLong();
const int32 seq2 = bitbuf.ReadLong();
assert(seq1 == seq2);
unsigned char cmd;
int32 tick;
int32 sequenceInfo1;
int32 sequenceInfo2;
democmdinfo_t cmdInfo;
std::vector<unsigned char> buffer;
const int32 numBytes = bitbuf.ReadLong();
std::vector<unsigned char> packet;
packet.resize(numBytes);
bitbuf.ReadBytes(&packet[0], numBytes);
ParsePacket(packet);
DemoSequenceReader reader(sequenceData);
for (;;)
{
reader.ReadCmdHeader(cmd, tick);
switch (cmd)
{
case dem_signon:
case dem_packet:
reader.ReadCmdInfo(cmdInfo);
reader.ReadSequenceInfo(sequenceInfo1, sequenceInfo2);
assert(sequenceInfo1 == sequenceInfo2);
reader.ReadRawData(buffer);
ParsePacket(buffer);
break;
case dem_synctick:
// nothing
break;
case dem_consolecmd:
break;
case dem_usercmd:
reader.ReadUserCmd(buffer);
break;
case dem_datatables:
// TODO: datatables
reader.ReadRawData(nullptr, 0);
break;
case dem_stop:
// TODO assert frame and tick numbers
break;
case dem_customdata:
reader.ReadRawData(nullptr, 0);
break;
case dem_stringtables:
break;
default:
assert(false);
break;
}
}
}
int main(const int argc, const char* argv[])
@ -49,48 +81,8 @@ int main(const int argc, const char* argv[])
}
auto demoHeader = demoFile.GetDemoHeader();
ParseSignonData(demoFile.GetSignOnData());
unsigned char cmd;
int32 tick;
int32 sequenceInfo1;
int32 sequenceInfo2;
democmdinfo_t cmdInfo;
std::vector<unsigned char> packet;
demoFile.ReadCmdHeader(cmd, tick);
assert(cmd == dem_synctick && tick == 0);
const int numFrames = demoHeader->playback_frames;
const int numTicks = demoHeader->playback_ticks;
for (int i = 0; i <= numFrames; ++i)
{
demoFile.ReadCmdHeader(cmd, tick);
//printf("tick: %i\n", tick);
switch (cmd)
{
case dem_packet:
demoFile.ReadCmdInfo(cmdInfo);
demoFile.ReadSequenceInfo(sequenceInfo1, sequenceInfo2);
assert(sequenceInfo1 == sequenceInfo2);
demoFile.ReadRawData(packet);
ParsePacket(packet);
break;
case dem_stop:
assert(i == numFrames && tick == numTicks);
break;
case dem_synctick:
case dem_consolecmd:
case dem_usercmd:
case dem_datatables:
default:
assert(false);
break;
}
}
ParseDemoSequence(demoFile.GetSignOnData());
ParseDemoSequence(demoFile.GetDemoData());
demoFile.Close();
return 0;
}

212
demboyz/demofile.cpp
View File

@ -27,129 +27,169 @@
#include <assert.h>
#include "demofile.h"
CDemoFile::CDemoFile():
m_DemoHeader(),
m_fileBufferPos(0)
DemoSequenceReader::DemoSequenceReader(const std::vector<unsigned char>& sequenceData):
m_sequenceData(sequenceData),
m_dataReadOffset(0)
{
}
CDemoFile::~CDemoFile()
int32 DemoSequenceReader::ReadRawData(char *buffer, int32 length)
{
Close();
}
void CDemoFile::ReadSequenceInfo( int32 &nSeqNrIn, int32 &nSeqNrOut )
{
if ( !m_fileBuffer.size() )
return;
nSeqNrIn = *( int32 * )( &m_fileBuffer[ m_fileBufferPos ] );
m_fileBufferPos += sizeof( int32 );
nSeqNrOut = *( int32 * )( &m_fileBuffer[ m_fileBufferPos ] );
m_fileBufferPos += sizeof( int32 );
}
void CDemoFile::ReadCmdInfo( democmdinfo_t& info )
{
if ( !m_fileBuffer.size() )
return;
memcpy( &info, &m_fileBuffer[ m_fileBufferPos ], sizeof( democmdinfo_t ) );
m_fileBufferPos += sizeof( democmdinfo_t );
}
void CDemoFile::ReadCmdHeader( unsigned char& cmd, int32& tick )
{
if ( !m_fileBuffer.size() )
return;
// Read the command
cmd = *( unsigned char * )( &m_fileBuffer[ m_fileBufferPos ] );
m_fileBufferPos += sizeof( unsigned char );
if ( cmd <=0 )
if (m_sequenceData.empty())
{
fprintf( stderr, "CDemoFile::ReadCmdHeader: Missing end tag in demo file.\n");
cmd = dem_stop;
return;
return 0;
}
assert( cmd >= 1 && cmd <= dem_lastcmd );
// Read the timestamp
tick = *( int32 * )( &m_fileBuffer[ m_fileBufferPos ] );
m_fileBufferPos += sizeof( int32 );
}
int32 CDemoFile::ReadUserCmd( char *buffer, int32 &size )
{
if ( !m_fileBuffer.size() )
return 0;
int32 outgoing_sequence = *( int32 * )( &m_fileBuffer[ m_fileBufferPos ] );
m_fileBufferPos += sizeof( int32 );
size = ReadRawData( buffer, size );
return outgoing_sequence;
}
int32 CDemoFile::ReadRawData( char *buffer, int32 length )
{
if ( !m_fileBuffer.size() )
return 0;
const unsigned char* sequenceData = m_sequenceData.data();
size_t currentReadOffset = m_dataReadOffset;
// read length of data block
int32 size = *( int32 * )( &m_fileBuffer[ m_fileBufferPos ] );
m_fileBufferPos += sizeof( int32 );
if ( buffer && (length < size) )
const int32 size = *reinterpret_cast<const int32*>(sequenceData + currentReadOffset);
currentReadOffset += sizeof(int32);
if (buffer && (length < size))
{
fprintf( stderr, "CDemoFile::ReadRawData: buffer overflow (%i).\n", size );
fprintf(stderr, "CDemoFile::ReadRawData: buffer overflow (%i).\n", size);
return -1;
}
if ( buffer )
if (buffer)
{
// read data into buffer
memcpy( buffer, &m_fileBuffer[ m_fileBufferPos ], size );
m_fileBufferPos += size;
}
else
{
// just skip it
m_fileBufferPos += size;
memcpy(buffer, sequenceData + currentReadOffset, size);
}
currentReadOffset += size;
m_dataReadOffset = currentReadOffset;
return size;
}
bool CDemoFile::ReadRawData(std::vector<unsigned char>& buf)
bool DemoSequenceReader::ReadRawData(std::vector<unsigned char>& buf,
const int32 maxReadSize /*= MAX_READ_SIZE*/)
{
if (!m_fileBuffer.size())
if (m_sequenceData.empty())
{
return false;
}
const unsigned char* sequenceData = m_sequenceData.data();
size_t currentReadOffset = m_dataReadOffset;
// read length of data block
int32 size = *(int32 *)(&m_fileBuffer[m_fileBufferPos]);
m_fileBufferPos += sizeof(int32);
const int32 size = *reinterpret_cast<const int32*>(sequenceData + currentReadOffset);
currentReadOffset += sizeof(int32);
if (size < 0)
{
fprintf(stderr, "CDemoFile::ReadRawData: invalid size (%i).\n", size);
fprintf(stderr, "DemoSequenceReader::ReadRawData: invalid size (%i).\n", size);
return false;
}
if (maxReadSize < 0 || size > maxReadSize)
{
fprintf(stderr, "DemoSequenceReader::ReadRawData: invalid size (%i) with max (%i).\n", size, maxReadSize);
return false;
}
buf.resize(size);
// read data into buffer
memcpy(&buf[0], &m_fileBuffer[m_fileBufferPos], size);
m_fileBufferPos += size;
memcpy(buf.data(), sequenceData + currentReadOffset, size);
currentReadOffset += size;
m_dataReadOffset = currentReadOffset;
return true;
}
void DemoSequenceReader::ReadSequenceInfo(int32 &nSeqNrIn, int32 &nSeqNrOut)
{
if (m_sequenceData.empty())
{
return;
}
const unsigned char* sequenceData = m_sequenceData.data();
size_t currentReadOffset = m_dataReadOffset;
nSeqNrIn = *reinterpret_cast<const int32*>(sequenceData + currentReadOffset);
currentReadOffset += sizeof(int32);
nSeqNrOut = *reinterpret_cast<const int32*>(sequenceData + currentReadOffset);
currentReadOffset += sizeof(int32);
m_dataReadOffset = currentReadOffset;
}
void DemoSequenceReader::ReadCmdInfo(democmdinfo_t& info)
{
if (m_sequenceData.empty())
{
return;
}
size_t currentReadOffset = m_dataReadOffset;
memcpy(&info, m_sequenceData.data() + currentReadOffset, sizeof(democmdinfo_t));
currentReadOffset += sizeof(democmdinfo_t);
m_dataReadOffset = currentReadOffset;
}
void DemoSequenceReader::ReadCmdHeader(unsigned char& cmd, int32& tick)
{
if (m_sequenceData.empty())
{
return;
}
const unsigned char* sequenceData = m_sequenceData.data();
size_t currentReadOffset = m_dataReadOffset;
// Read the command
cmd = sequenceData[currentReadOffset];
currentReadOffset += sizeof(unsigned char);
if (cmd > 0)
{
assert(cmd <= dem_lastcmd);
// Read the timestamp
tick = *reinterpret_cast<const int32*>(sequenceData + currentReadOffset);
currentReadOffset += sizeof(int32);
}
else
{
fprintf(stderr, "CDemoFile::ReadCmdHeader: Missing end tag in demo file.\n");
cmd = dem_stop;
}
m_dataReadOffset = currentReadOffset;
}
int32 DemoSequenceReader::ReadUserCmd(std::vector<unsigned char>& buf)
{
if (m_sequenceData.empty())
{
return 0;
}
const int32 outgoing_sequence = *reinterpret_cast<const int32*>(m_sequenceData.data() + m_dataReadOffset);
m_dataReadOffset += sizeof(int32);
if (!ReadRawData(buf))
{
return 0;
}
return outgoing_sequence;
}
CDemoFile::CDemoFile():
m_DemoHeader()
{
}
CDemoFile::~CDemoFile()
{
Close();
}
bool CDemoFile::Open( const char *name )
{
Close();
@ -209,8 +249,6 @@ bool CDemoFile::Open( const char *name )
Close();
return false;
}
m_fileBufferPos = 0;
return true;
}
@ -218,6 +256,4 @@ void CDemoFile::Close()
{
m_signOnData.clear();
m_fileBuffer.clear();
m_fileBufferPos = 0;
}

43
demboyz/demofile.h
View File

@ -218,6 +218,29 @@ struct democmdinfo_t
Split_t u[ MAX_SPLITSCREEN_CLIENTS ];
};
class DemoSequenceReader
{
static const int32 MAX_READ_SIZE = 1024 * 1024;
public:
DemoSequenceReader(const std::vector<unsigned char>& sequenceData);
int32 ReadRawData(char *buffer, int32 length);
bool ReadRawData(std::vector<unsigned char>& buf, const int32 maxReadSize = MAX_READ_SIZE);
void ReadSequenceInfo(int32 &nSeqNrIn, int32 &nSeqNrOutAck);
void ReadCmdInfo(democmdinfo_t& info);
void ReadCmdHeader(unsigned char &cmd, int32 &tick);
int32 ReadUserCmd(std::vector<unsigned char>& buf);
private:
const std::vector<unsigned char>& m_sequenceData;
size_t m_dataReadOffset;
};
class CDemoFile
{
public:
@ -227,29 +250,16 @@ public:
bool Open( const char *name );
void Close();
int32 ReadRawData( char *buffer, int32 length );
bool ReadRawData(std::vector<unsigned char>& buf);
void ReadSequenceInfo( int32 &nSeqNrIn, int32 &nSeqNrOutAck );
void ReadCmdInfo( democmdinfo_t& info );
void ReadCmdHeader( unsigned char &cmd, int32 &tick );
int32 ReadUserCmd( char *buffer, int32 &size );
const demoheader_t *GetDemoHeader() const;
const std::vector<unsigned char>& GetSignOnData() const;
const std::vector<unsigned char>& GetDemoData() const;
private:
demoheader_t m_DemoHeader; //general demo info
std::vector<unsigned char> m_signOnData;
std::vector<unsigned char> m_fileBuffer;
size_t m_fileBufferPos;
};
inline const demoheader_t *CDemoFile::GetDemoHeader() const
@ -262,4 +272,9 @@ inline const std::vector<unsigned char>& CDemoFile::GetSignOnData() const
return m_signOnData;
}
inline const std::vector<unsigned char>& CDemoFile::GetDemoData() const
{
return m_fileBuffer;
}
#endif // DEMOFILE_H