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[raknet] Add BitStream ctor/dtor

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RD42
2023-12-07 23:17:19 +08:00
parent 3019bf70c1
commit c15853af35
2 changed files with 190 additions and 0 deletions
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121
raknet/BitStream.cpp Normal file
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// TODO: Implement BitStream.cpp
#include "BitStream.h"
#include <stdlib.h>
#include <string.h>
using namespace RakNet;
BitStream::BitStream()
{
numberOfBitsUsed = 0;
//numberOfBitsAllocated = 32 * 8;
numberOfBitsAllocated = BITSTREAM_STACK_ALLOCATION_SIZE * 8;
readOffset = 0;
//data = ( unsigned char* ) malloc( 32 );
data = ( unsigned char* ) stackData;
#ifdef _DEBUG
// assert( data );
#endif
//memset(data, 0, 32);
copyData = true;
}
BitStream::BitStream( int initialBytesToAllocate )
{
numberOfBitsUsed = 0;
readOffset = 0;
if (initialBytesToAllocate <= BITSTREAM_STACK_ALLOCATION_SIZE)
{
data = ( unsigned char* ) stackData;
numberOfBitsAllocated = BITSTREAM_STACK_ALLOCATION_SIZE * 8;
}
else
{
data = ( unsigned char* ) malloc( initialBytesToAllocate );
numberOfBitsAllocated = initialBytesToAllocate << 3;
}
#ifdef _DEBUG
assert( data );
#endif
// memset(data, 0, initialBytesToAllocate);
copyData = true;
}
BitStream::BitStream( unsigned char* _data, unsigned int lengthInBytes, bool _copyData )
{
numberOfBitsUsed = lengthInBytes << 3;
readOffset = 0;
copyData = _copyData;
numberOfBitsAllocated = lengthInBytes << 3;
if ( copyData )
{
if ( lengthInBytes > 0 )
{
if (lengthInBytes < BITSTREAM_STACK_ALLOCATION_SIZE)
{
data = ( unsigned char* ) stackData;
numberOfBitsAllocated = BITSTREAM_STACK_ALLOCATION_SIZE << 3;
}
else
{
data = ( unsigned char* ) malloc( lengthInBytes );
}
#ifdef _DEBUG
assert( data );
#endif
memcpy( data, _data, lengthInBytes );
}
else
data = 0;
}
else
data = ( unsigned char* ) _data;
}
// SAMPSRV (adding this just as a tag for next RakNet upgrade)
BitStream::BitStream( char* _dataC, unsigned int lengthInBytes, bool _copyData )
{
unsigned char* _data = reinterpret_cast<unsigned char*>(_dataC);
numberOfBitsUsed = lengthInBytes << 3;
readOffset = 0;
copyData = _copyData;
numberOfBitsAllocated = lengthInBytes << 3;
if ( copyData )
{
if ( lengthInBytes > 0 )
{
if (lengthInBytes < BITSTREAM_STACK_ALLOCATION_SIZE)
{
data = ( unsigned char* ) stackData;
numberOfBitsAllocated = BITSTREAM_STACK_ALLOCATION_SIZE << 3;
}
else
{
data = ( unsigned char* ) malloc( lengthInBytes );
}
#ifdef _DEBUG
assert( data );
#endif
memcpy( data, _data, lengthInBytes );
}
else
data = 0;
}
else
data = ( unsigned char* ) _data;
}
BitStream::~BitStream()
{
if ( copyData && numberOfBitsAllocated > BITSTREAM_STACK_ALLOCATION_SIZE << 3)
free( data ); // Use realloc and free so we are more efficient than delete and new for resizing
}