BitStream_NoTemplate.cpp

/// \depreciated

#if defined(_MSC_VER) && _MSC_VER < 1299 // VC6 doesn't support template specialization

#include "RakNetDefines.h"
#include "BitStream.h"
#include <stdlib.h>
#include <assert.h>
#include <memory.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <float.h>

#if defined ( __APPLE__ ) || defined ( __APPLE_CC__ )
	#include <malloc/malloc.h>
#else
	#include <malloc.h>
#endif

#ifdef __BITSTREAM_BIG_END
// Set up the read/write routines to produce Big-End network streams.
#define B16_1 0
#define B16_0 1

#define B32_3 0
#define B32_2 1
#define B32_1 2
#define B32_0 3

#define B64_7 0
#define B64_6 1
#define B64_5 2
#define B64_4 3
#define B64_3 4
#define B64_2 5
#define B64_1 6
#define B64_0 7

#else
// Default to producing Little-End network streams.
#define B16_1 1
#define B16_0 0

#define B32_3 3
#define B32_2 2
#define B32_1 1
#define B32_0 0

#define B64_7 7
#define B64_6 6
#define B64_5 5
#define B64_4 4
#define B64_3 3
#define B64_2 2
#define B64_1 1
#define B64_0 0
#endif

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( 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;
}

// Use this if you pass a pointer copy to the constructor (_copyData==false) and want to overallocate to prevent reallocation
void BitStream::SetNumberOfBitsAllocated( const unsigned int lengthInBits )
{
#ifdef _DEBUG
	assert( lengthInBits >= ( unsigned int ) numberOfBitsAllocated );
#endif	
	numberOfBitsAllocated = lengthInBits;
}

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
}

void BitStream::Reset( void )
{
	// Note:  Do NOT reallocate memory because BitStream is used
	// in places to serialize/deserialize a buffer. Reallocation
	// is a dangerous operation (may result in leaks).
	
	if ( numberOfBitsUsed > 0 )
	{
		//  memset(data, 0, BITS_TO_BYTES(numberOfBitsUsed));
	}
	
	// Don't free memory here for speed efficiency
	//free(data);  // Use realloc and free so we are more efficient than delete and new for resizing
	numberOfBitsUsed = 0;
	
	//numberOfBitsAllocated=8;
	readOffset = 0;
	
	//data=(unsigned char*)malloc(1);
	// if (numberOfBitsAllocated>0)
	//  memset(data, 0, BITS_TO_BYTES(numberOfBitsAllocated));
}

// Write the native types to the end of the buffer
void BitStream::Write( const bool input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 0;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
	if ( input )
		Write1();
	else
		Write0();
}

void BitStream::Write( const unsigned char input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 1;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
	WriteBits( ( unsigned char* ) & input, sizeof( input ) * 8, true );
}

void BitStream::Write( const char input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 2;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
	WriteBits( ( unsigned char* ) & input, sizeof( input ) * 8, true );
}

void BitStream::Write( const unsigned short input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 3;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif

#ifdef __BITSTREAM_NATIVE_END
	WriteBits( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else	
	static unsigned char uint16w[2];
	uint16w[B16_1] =  (input >> 8)&(0xff);
	uint16w[B16_0] = input&(0xff);

	WriteBits( uint16w, sizeof( input ) * 8, true );
#endif
}

void BitStream::Write( const short input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 4;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	WriteBits( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	static unsigned char int16w[2];
	int16w[B16_1] =  (input >> 8)&(0xff);
	int16w[B16_0] = input&(0xff);
	
	WriteBits( int16w, sizeof( input ) * 8, true );
#endif
}

void BitStream::Write( const unsigned int input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 5;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	WriteBits( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	static unsigned char uint32w[4];
	uint32w[B32_3] = (input >> 24)&(0x000000ff);
	uint32w[B32_2] = (input >> 16)&(0x000000ff);
	uint32w[B32_1] = (input >> 8)&(0x000000ff);
	uint32w[B32_0] = (input)&(0x000000ff);
	
	WriteBits( uint32w, sizeof( input ) * 8, true );
#endif
}

void BitStream::Write( const int input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 6;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	WriteBits( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	static unsigned char int32w[4];
	int32w[B32_3] = (input >> 24)&(0x000000ff);
	int32w[B32_2] = (input >> 16)&(0x000000ff);
	int32w[B32_1] = (input >> 8)&(0x000000ff);
	int32w[B32_0] = (input)&(0x000000ff);
	
	WriteBits( int32w, sizeof( input ) * 8, true );
#endif
}

// This doesn't compile on windows.  Find another way to output the warning
#if defined ( __APPLE__ ) || defined ( __APPLE_CC__ )|| defined ( _WIN32 )
//#warning Do NOT use 'long' for network data  - it is not cross-compiler nor 32/64-bit safe
void BitStream::Write( const unsigned long input )
{
	printf("*** WARNING: Do not use 'long' to declare network data.\n");
	printf("*** It is not safe betwen compilers or between 32/64-bit systems.\n");
	Write( (const unsigned int) input );
}
void BitStream::Write( const long input )
{
	printf("*** WARNING: Do not use 'long' to declare network data.\n");
	printf("*** It is not safe betwen compilers or between 32/64-bit systems.\n");
	Write( (const int) input );
}
#endif

#ifdef HAS_INT64
void BitStream::Write( const uint64_t input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 7;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	WriteBits( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	static unsigned char uint64w[8];
	uint64w[B64_7] = (input >> 56) & 0xff;
	uint64w[B64_6] = (input >> 48) & 0xff;
	uint64w[B64_5] = (input >> 40) & 0xff;
	uint64w[B64_4] = (input >> 32) & 0xff;
	uint64w[B64_3] = (input >> 24) & 0xff;
	uint64w[B64_2] = (input >> 16) & 0xff;
	uint64w[B64_1] = (input >> 8) & 0xff;
	uint64w[B64_0] = input & 0xff;
	
	WriteBits( uint64w, sizeof( input ) * 8, true );
#endif
}

void BitStream::Write( const int64_t input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 8;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	WriteBits( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	static unsigned char int64w[8];
	int64w[B64_7] = (input >> 56) & 0xff;
	int64w[B64_6] = (input >> 48) & 0xff;
	int64w[B64_5] = (input >> 40) & 0xff;
	int64w[B64_4] = (input >> 32) & 0xff;
	int64w[B64_3] = (input >> 24) & 0xff;
	int64w[B64_2] = (input >> 16) & 0xff;
	int64w[B64_1] = (input >> 8) & 0xff;
	int64w[B64_0] = input & 0xff;
	
	WriteBits( int64w, sizeof( input ) * 8, true );
#endif
}

#endif

void BitStream::Write( const float input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 9;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif

#ifndef __BITSTREAM_NATIVE_END
	unsigned int intval = *((unsigned int *)(&input));
	Write(intval);
#else
	WriteBits( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#endif
}

void BitStream::Write( const double input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 10;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif

#if defined ( __BITSTREAM_NATIVE_END ) || ( ! defined (HAS_INT64) )
	WriteBits( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	uint64_t intval = *((uint64_t *)(&input));
	Write(intval);
#endif
}
// Write an array or casted stream
void BitStream::Write( const char* input, const int numberOfBytes )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 11;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
	WriteBits( ( unsigned char* ) & numberOfBytes, sizeof( int ) * 8, true );
#endif
	
	WriteBits( ( unsigned char* ) input, numberOfBytes * 8, true );
}
void BitStream::Write( const BitStream *bitStream )
{
	WriteBits(bitStream->GetData(), bitStream->GetNumberOfBitsUsed(), false);
}

void BitStream::Write( const NetworkID networkId )
{
	Write(networkId.playerId.binaryAddress);
	Write(networkId.playerId.port);
	Write(networkId.localSystemId);
}

// Write the native types with simple compression.
// Best used with  negatives and positives close to 0
void BitStream::WriteCompressed( const unsigned char input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 12;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
	WriteCompressed( ( unsigned char* ) & input, sizeof( input ) * 8, true );
}

void BitStream::WriteCompressed( const char input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 13;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
	WriteCompressed( ( unsigned char* ) & input, sizeof( input ) * 8, false );
}

void BitStream::WriteCompressed( const unsigned short input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 14;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	WriteCompressed( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	static unsigned char uint16wc[2];
	uint16wc[B16_1] =  (input >> 8)&(0xff);
	uint16wc[B16_0] = input&(0xff);
	
	WriteCompressed( uint16wc, sizeof( input ) * 8, true );
#endif
}

void BitStream::WriteCompressed( const short input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 15;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	WriteCompressed( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	static unsigned char int16wc[2];
	int16wc[B16_1] =  (input >> 8)&(0xff);
	int16wc[B16_0] = input&(0xff);
	
	WriteCompressed( int16wc, sizeof( input ) * 8, false );
#endif
}

void BitStream::WriteCompressed( const unsigned int input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 16;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	WriteCompressed( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	static unsigned char uint32wc[4];
	uint32wc[B32_3] = (input >> 24)&(0x000000ff);
	uint32wc[B32_2] = (input >> 16)&(0x000000ff);
	uint32wc[B32_1] = (input >> 8)&(0x000000ff);
	uint32wc[B32_0] = (input)&(0x000000ff);
	
	WriteCompressed( uint32wc, sizeof( input ) * 8, true );
#endif
}

void BitStream::WriteCompressed( const int input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 17;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	WriteCompressed( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	static unsigned char int32wc[4];
	int32wc[B32_3] = (input >> 24)&(0x000000ff);
	int32wc[B32_2] = (input >> 16)&(0x000000ff);
	int32wc[B32_1] = (input >> 8)&(0x000000ff);
	int32wc[B32_0] = (input)&(0x000000ff);
	
	WriteCompressed( int32wc, sizeof( input ) * 8, false );
#endif
}

// Doesn't work on windows.  Find another way to output the warning
#if defined ( __APPLE__ ) || defined ( __APPLE_CC__ )|| defined ( _WIN32 )
void BitStream::WriteCompressed( const unsigned long input )
{
	printf("*** WARNING: Do not use 'long' to declare network data.\n");
	printf("*** It is not safe betwen compilers or between 32/64-bit systems.\n");
	WriteCompressed( (const unsigned int) input );
}
void BitStream::WriteCompressed( const long input )
{
	printf("*** WARNING: Do not use 'long' to declare network data.\n");
	printf("*** It is not safe betwen compilers or between 32/64-bit systems.\n");
	WriteCompressed( (const int) input );
}
#endif

#ifdef HAS_INT64
void BitStream::WriteCompressed( const uint64_t input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 18;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	WriteCompressed( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	static unsigned char uint64wc[8];
	uint64wc[B64_7] = (input >> 56) & 0xff;
	uint64wc[B64_6] = (input >> 48) & 0xff;
	uint64wc[B64_5] = (input >> 40) & 0xff;
	uint64wc[B64_4] = (input >> 32) & 0xff;
	uint64wc[B64_3] = (input >> 24) & 0xff;
	uint64wc[B64_2] = (input >> 16) & 0xff;
	uint64wc[B64_1] = (input >> 8) & 0xff;
	uint64wc[B64_0] = input & 0xff;
	
	WriteCompressed( uint64wc, sizeof( input ) * 8, true );
#endif
}

void BitStream::WriteCompressed( const int64_t input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 19;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	WriteCompressed( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	static unsigned char int64wc[8];
	int64wc[B64_7] = (input >> 56) & 0xff;
	int64wc[B64_6] = (input >> 48) & 0xff;
	int64wc[B64_5] = (input >> 40) & 0xff;
	int64wc[B64_4] = (input >> 32) & 0xff;
	int64wc[B64_3] = (input >> 24) & 0xff;
	int64wc[B64_2] = (input >> 16) & 0xff;
	int64wc[B64_1] = (input >> 8) & 0xff;
	int64wc[B64_0] = input & 0xff;
	
	WriteCompressed( int64wc, sizeof( input ) * 8, false );
#endif
}
#endif


void BitStream::WriteCompressed( const float input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 20;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif

// Not yet implemented (no compression)
#if defined ( __BITSTREAM_NATIVE_END )
	WriteBits( ( unsigned char* ) &input, sizeof( input ) * 8, true );
#else
	Write( input );
#endif
}

void BitStream::WriteNormVector( float x, float y, float z )
{
#ifdef _DEBUG
	assert(x <= 1.01f && y <= 1.01f && z <= 1.01f && x >= -1.01f && y >= -1.01f && z >= -1.01f);
#endif
	if (x>1.0f)
		x=1.0f;
	if (y>1.0f)
		y=1.0f;
	if (z>1.0f)
		z=1.0f;
	if (x<-1.0f)
		x=-1.0f;
	if (y<-1.0f)
		y=-1.0f;
	if (z<-1.0f)
		z=-1.0f;

	Write((bool) (x < 0.0f));

	if (y==0.0f)
		Write(true);
	else
	{
		Write(false);
		Write((unsigned short)((y+1.0f)*32767.5f));
	}
	if (z==0.0f)
		Write(true);
	else
	{
		Write(false);
		Write((unsigned short)((z+1.0f)*32767.5f));
	}
}
void BitStream::WriteVector( float x, float y, float z )
{
	float magnitude = sqrtf(x * x + y * y + z * z);
	Write(magnitude);
	if (magnitude > 0.0f)
	{
		Write((unsigned short)((x/magnitude+1.0f)*32767.5f));
		Write((unsigned short)((y/magnitude+1.0f)*32767.5f));
		Write((unsigned short)((z/magnitude+1.0f)*32767.5f));
	}
}
void BitStream::WriteNormQuat( float w, float x, float y, float z)
{
	Write((bool)(w<0.0f));
	Write((bool)(x<0.0f));
	Write((bool)(y<0.0f));
	Write((bool)(z<0.0f));
    Write((unsigned short)(fabs(x)*65535.0));
	Write((unsigned short)(fabs(y)*65535.0));
	Write((unsigned short)(fabs(z)*65535.0));
	// Leave out w and calcuate it on the target
}
void BitStream::WriteOrthMatrix( 
					 float m00, float m01, float m02,
					 float m10, float m11, float m12,
					 float m20, float m21, float m22 )
{
	double qw;
	double qx;
	double qy;
	double qz;

	// Convert matrix to quat
	// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/
	qw = sqrt( 1 + m00 + m11 + m22  ) / 2; 
	qx = sqrt( 1 + m00 - m11 - m22  ) / 2; 
	qy = sqrt( 1 - m00 + m11 - m22  ) / 2; 
	qz = sqrt( 1 - m00 - m11 + m22  ) / 2;
	if (qw < 0.0) qw=0.0;
	if (qx < 0.0) qx=0.0;
	if (qy < 0.0) qy=0.0;
	if (qz < 0.0) qz=0.0;
	qx = _copysign( qx, m21 - m12 );
	qy = _copysign( qy, m02 - m20 );
	qz = _copysign( qz, m20 - m02 );

	WriteNormQuat((float)qw,(float)qx,(float)qy,(float)qz);
}

void BitStream::WriteCompressed( const double input )
{
#ifdef TYPE_CHECKING
	unsigned char ID = 21;
	WriteBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8, true );
#endif
	
	// Not yet implemented (no compression)
#if defined ( __BITSTREAM_NATIVE_END )
	WriteBits( ( unsigned char* ) & input, sizeof( input ) * 8, true );
#else
	Write( input );
#endif
}

// Read the native types from the front of the buffer
// Write the native types to the end of the buffer
bool BitStream::Read( bool& output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
#ifdef _DEBUG
		
	assert( ID == 0 );
	
#endif
#endif
	
	//assert(readOffset+1 <=numberOfBitsUsed); // If this assert is hit the stream wasn't long enough to read from
	if ( readOffset + 1 > numberOfBitsUsed )
		return false;
		
	//if (ReadBit()) // Check that bit
	if ( data[ readOffset >> 3 ] & ( 0x80 >> ( readOffset++ % 8 ) ) )   // Is it faster to just write it out here?
		output = true;
	else
		output = false;
		
	return true;
}

bool BitStream::Read( unsigned char &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 1 );
	
#endif
	
	return ReadBits( ( unsigned char* ) & output, sizeof( output ) * 8 );
}

bool BitStream::Read( char &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 2 );
	
#endif
	
	return ReadBits( ( unsigned char* ) & output, sizeof( output ) * 8 );
}

bool BitStream::Read( unsigned short &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 3 );
	
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	return ReadBits( ( unsigned char* ) & output, sizeof( output ) * 8 );
#else
	static unsigned char uint16r[2];
	if (ReadBits( uint16r, sizeof( output ) * 8 ) != true) return false;
	output = (((unsigned short) uint16r[B16_1])<<8)|((unsigned short)uint16r[B16_0]);
	return true;
#endif
}

bool BitStream::Read( short &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 4 );
	
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	return ReadBits( ( unsigned char* ) & output, sizeof( output ) * 8 );
#else
	static unsigned char int16r[2];
	if (ReadBits( int16r, sizeof( output ) * 8 ) != true) return false;
	output = (((unsigned short) int16r[B16_1])<<8)|((unsigned short)int16r[B16_0]);
	return true;
#endif
}

bool BitStream::Read( unsigned int &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 5 );
	
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	return ReadBits( ( unsigned char* ) & output, sizeof( output ) * 8 );
#else
	static unsigned char uint32r[4];
	if(ReadBits( uint32r, sizeof( output ) * 8 ) != true)
		return false;
	output = (((unsigned int) uint32r[B32_3])<<24)|
		(((unsigned int) uint32r[B32_2])<<16)|
		(((unsigned int) uint32r[B32_1])<<8)|
		((unsigned int) uint32r[B32_0]);
	return true;
#endif
}

bool BitStream::Read( int &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 6 );
	
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	return ReadBits( ( unsigned char* ) & output, sizeof( output ) * 8 );
#else
	static unsigned char int32r[4];
	if(ReadBits( int32r, sizeof( output ) * 8 ) != true)
		return false;
	output = (((unsigned int) int32r[B32_3])<<24)|
		(((unsigned int) int32r[B32_2])<<16)|
		(((unsigned int) int32r[B32_1])<<8)|
		((unsigned int) int32r[B32_0]);
	return true;
#endif
}

// This doesn't compile on windows.  Find another way to output the warning
#if defined ( __APPLE__ ) || defined ( __APPLE_CC__ )|| defined ( _WIN32 )
//#warning Do NOT use 'long' for network data  - it is not cross-compiler nor 32/64-bit safe
bool BitStream::Read( unsigned long &output )
{
	printf("*** WARNING: Do not use 'long' to declare network data.\n");
	printf("*** It is not safe betwen compilers or between 32/64-bit systems.\n");
	unsigned int tmp;
	if ( !Read(tmp) ) return false;
	output = tmp;
	return true;
}
bool BitStream::Read( long &output )
{
	printf("*** WARNING: Do not use 'long' to declare network data.\n");
	printf("*** It is not safe betwen compilers or between 32/64-bit systems.\n");
	int tmp;
	if ( !Read(tmp) ) return false;
	output = tmp;
	return true;
}
#endif

#ifdef HAS_INT64
bool BitStream::Read( uint64_t &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 7 );
	
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	return ReadBits( ( unsigned char* ) & output, sizeof( output ) * 8 );
#else
	static unsigned char uint64r[8];
	if(ReadBits( uint64r, sizeof( output ) * 8 ) != true)
		return false;
	output = (((uint64_t) uint64r[B64_7])<<56)|(((uint64_t) uint64r[B64_6])<<48)|
		(((uint64_t) uint64r[B64_5])<<40)|(((uint64_t) uint64r[B64_4])<<32)|
		(((uint64_t) uint64r[B64_3])<<24)|(((uint64_t) uint64r[B64_2])<<16)|
		(((uint64_t) uint64r[B64_1])<<8)|((uint64_t) uint64r[B64_0]);
	return true;
#endif
}

bool BitStream::Read( int64_t &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 8 );
	
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	return ReadBits( ( unsigned char* ) & output, sizeof( output ) * 8 );
#else
	static unsigned char int64r[8];
	if(ReadBits( int64r, sizeof( output ) * 8 ) != true)
		return false;
	output = (((uint64_t) int64r[B64_7])<<56)|(((uint64_t) int64r[B64_6])<<48)|
		(((uint64_t) int64r[B64_5])<<40)|(((uint64_t) int64r[B64_4])<<32)|
		(((uint64_t) int64r[B64_3])<<24)|(((uint64_t) int64r[B64_2])<<16)|
		(((uint64_t) int64r[B64_1])<<8)|((uint64_t) int64r[B64_0]);
	return true;
#endif
}
#endif

bool BitStream::Read( float &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 9 );
	
#endif

#ifdef __BITSTREAM_NATIVE_END
	return ReadBits( ( unsigned char* ) & output, sizeof( output ) * 8 );
#else
	unsigned int val;
	if (Read(val) == false) return false;
	output = *((float *)(&val));
	return true;
#endif
}

bool BitStream::Read( double &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 10 );
	
#endif
	
#if defined ( __BITSTREAM_NATIVE_END ) || ( ! defined ( HAS_INT64 ) )
	return ReadBits( ( unsigned char* ) & output, sizeof( output ) * 8 );
#else
	uint64_t val;
	if (Read(val) == false) return false;
	output = *((double *)(&val));
	return true;
#endif
}
// Read an array or casted stream
bool BitStream::Read( char* output, const int numberOfBytes )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 11 );
	
	int NOB;
	
	ReadBits( ( unsigned char* ) & NOB, sizeof( int ) * 8 );
	
	assert( NOB == numberOfBytes );
	
#endif
	
	return ReadBits( ( unsigned char* ) output, numberOfBytes * 8 );
}

bool BitStream::Read( NetworkID &output)
{
	Read(output.playerId.binaryAddress);
	Read(output.playerId.port);
	return Read(output.localSystemId);
}
// Read the types you wrote with WriteCompressed
bool BitStream::ReadCompressed( unsigned char & output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 12 );
	
#endif
	
	return ReadCompressed( ( unsigned char* ) & output, sizeof( output ) * 8, true );
}

bool BitStream::ReadCompressed( char &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 13 );
	
#endif
	
	return ReadCompressed( ( unsigned char* ) & output, sizeof( output ) * 8, false );
}

bool BitStream::ReadCompressed( unsigned short &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 14 );
	
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	return ReadCompressed( ( unsigned char* ) & output, sizeof( output ) * 8, true );
#else
	static unsigned char uint16rc[2];
	if (ReadCompressed( uint16rc, sizeof( output ) * 8, true ) != true) return false;
	output = (((unsigned short) uint16rc[B16_1])<<8)|
		((unsigned short)uint16rc[B16_0]);
	return true;
#endif
}

bool BitStream::ReadCompressed( short &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 15 );
	
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	return ReadCompressed( ( unsigned char* ) & output, sizeof( output ) * 8, true );
#else
	static unsigned char int16rc[2];
	if (ReadCompressed( int16rc, sizeof( output ) * 8, false ) != true) return false;
	output = (((unsigned short) int16rc[B16_1])<<8)|((unsigned short)int16rc[B16_0]);
	return true;
#endif
}

bool BitStream::ReadCompressed( unsigned int &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 16 );
	
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	return ReadCompressed( ( unsigned char* ) & output, sizeof( output ) * 8, true );
#else
	static unsigned char uint32rc[4];
	if(ReadCompressed( uint32rc, sizeof( output ) * 8, true ) != true)
		return false;
	output = (((unsigned int) uint32rc[B32_3])<<24)|
		(((unsigned int) uint32rc[B32_2])<<16)|
		(((unsigned int) uint32rc[B32_1])<<8)|
		((unsigned int) uint32rc[B32_0]);
	return true;
#endif
}

bool BitStream::ReadCompressed( int &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 17 );
	
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	return ReadCompressed( ( unsigned char* ) & output, sizeof( output ) * 8, true );
#else
	static unsigned char int32rc[4];
	if(ReadCompressed( int32rc, sizeof( output ) * 8, false ) != true)
		return false;
	output = (((unsigned int) int32rc[B32_3])<<24)|
		(((unsigned int) int32rc[B32_2])<<16)|
		(((unsigned int) int32rc[B32_1])<<8)|
		((unsigned int) int32rc[B32_0]);
	return true;
#endif
}

// This doesn't compile on windows.  Find another way to output the warning
#if defined ( __APPLE__ ) || defined ( __APPLE_CC__ )|| defined ( _WIN32 )
//#warning Do NOT use 'long' for network data  - it is not cross-compiler nor 32/64-bit safe
bool BitStream::ReadCompressed( unsigned long &output )
{
	printf("*** WARNING: Do not use 'long' to declare network data.\n");
	printf("*** It is not safe betwen compilers or between 32/64-bit systems.\n");
	unsigned int tmp;
	if ( !ReadCompressed(tmp) ) return false;
	output = tmp;
	return true;
}
bool BitStream::ReadCompressed( long &output )
{
	printf("*** WARNING: Do not use 'long' to declare network data.\n");
	printf("*** It is not safe betwen compilers or between 32/64-bit systems.\n");
	int tmp;
	if ( !ReadCompressed(tmp) ) return false;
	output = tmp;
	return true;
}
#endif

#ifdef HAS_INT64
bool BitStream::ReadCompressed( uint64_t &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 18 );
	
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	return ReadCompressed( ( unsigned char* ) & output, sizeof( output ) * 8, true );
#else
	static unsigned char uint64rc[8];
	if(ReadCompressed( uint64rc, sizeof( output ) * 8, true ) != true)
		return false;
	output = (((uint64_t) uint64rc[B64_7])<<56)|(((uint64_t) uint64rc[B64_6])<<48)|
		(((uint64_t) uint64rc[B64_5])<<40)|(((uint64_t) uint64rc[B64_4])<<32)|
		(((uint64_t) uint64rc[B64_3])<<24)|(((uint64_t) uint64rc[B64_2])<<16)|
		(((uint64_t) uint64rc[B64_1])<<8)|((uint64_t) uint64rc[B64_0]);
	return true;
#endif
}

bool BitStream::ReadCompressed( int64_t& output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 19 );
	
#endif
	
#ifdef __BITSTREAM_NATIVE_END
	return ReadCompressed( ( unsigned char* ) & output, sizeof( output ) * 8, true );
#else
	static unsigned char int64rc[8];
	if(ReadCompressed( int64rc, sizeof( output ) * 8, false ) != true)
		return false;
	output = (((uint64_t) int64rc[B64_7])<<56)|(((uint64_t) int64rc[B64_6])<<48)|
		(((uint64_t) int64rc[B64_5])<<40)|(((uint64_t) int64rc[B64_4])<<32)|
		(((uint64_t) int64rc[B64_3])<<24)|(((uint64_t) int64rc[B64_2])<<16)|
		(((uint64_t) int64rc[B64_1])<<8)|((uint64_t) int64rc[B64_0]);
	return true;
#endif
}
#endif

bool BitStream::ReadCompressed( float &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 20 );
	
#endif
	

	// Not yet implemented
#ifdef __BITSTREAM_NATIVE_END
	return ReadBits( ( unsigned char* ) & output, sizeof( output ) * 8 );
#else
	return Read( output );
#endif
}
bool BitStream::ReadNormVector( float &x, float &y, float &z )
{
	unsigned short sy, sz;
	bool yZero, zZero;
	bool xNeg;

	Read(xNeg);

	Read(yZero);
	if (yZero)
		y=0.0f;
	else
	{
		Read(sy);
		y=((float)sy / 32767.5f - 1.0f);
	}

	if (!Read(zZero))
		return false;

	if (zZero)
		z=0.0f;
	else
	{
		if (!Read(sz))
			return false;

		z=((float)sz / 32767.5f - 1.0f);
	}

	x = sqrtf(1.0f - y*y - z*z);
	if (xNeg)
		x=-x;
	return true;
}
bool BitStream::ReadVector( float &x, float &y, float &z )
{
	float magnitude;
	unsigned short sx,sy,sz;
	if (!Read(magnitude))
		return false;
	if (magnitude!=0.0f)
	{
		Read(sx);
		Read(sy);
		if (!Read(sz))
			return false;
		x=((float)sx / 32767.5f - 1.0f) * magnitude;
		y=((float)sy / 32767.5f - 1.0f) * magnitude;
		z=((float)sz / 32767.5f - 1.0f) * magnitude;
	}
	else
	{
		x=0.0f;
		y=0.0f;
		z=0.0f;
	}
	return true;
}
bool BitStream::ReadNormQuat( float &w, float &x, float &y, float &z)
{
	bool cwNeg, cxNeg, cyNeg, czNeg;
	unsigned short cx,cy,cz;
	Read(cwNeg);
	Read(cxNeg);
	Read(cyNeg);
	Read(czNeg);
	Read(cx);
	Read(cy);
	if (!Read(cz))
		return false;

	// Calculate w from x,y,z
	x=cx/65535.0f;
	y=cy/65535.0f;
	z=cz/65535.0f;
	if (cxNeg) x=-x;
	if (cyNeg) y=-y;
	if (czNeg) z=-z;
	w = sqrt(1.0f - x*x - y*y - z*z);
	if (cwNeg)
		w=-w;
	return true;
}
bool BitStream::ReadOrthMatrix( 
					float &m00, float &m01, float &m02,
					float &m10, float &m11, float &m12,
					float &m20, float &m21, float &m22 )
{
	float qw,qx,qy,qz;
	if (!ReadNormQuat(qw,qx,qy,qz))
		return false;

	// Quat to orthogonal rotation matrix
	// http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToMatrix/index.htm
	double sqw = (double)qw*(double)qw;
	double sqx = (double)qx*(double)qx;
	double sqy = (double)qy*(double)qy;
	double sqz = (double)qz*(double)qz;
	m00 =  (float)(sqx - sqy - sqz + sqw); // since sqw + sqx + sqy + sqz =1
	m11 = (float)(-sqx + sqy - sqz + sqw);
	m22 = (float)(-sqx - sqy + sqz + sqw);

	double tmp1 = (double)qx*(double)qy;
	double tmp2 = (double)qz*(double)qw;
	m10 = (float)(2.0 * (tmp1 + tmp2));
	m01 = (float)(2.0 * (tmp1 - tmp2));

	tmp1 = (double)qx*(double)qz;
	tmp2 = (double)qy*(double)qw;
	m20 =(float)(2.0 * (tmp1 - tmp2));
	m02 = (float)(2.0 * (tmp1 + tmp2));
	tmp1 = (double)qy*(double)qz;
	tmp2 = (double)qx*(double)qw;
	m21 = (float)(2.0 * (tmp1 + tmp2));
	m12 = (float)(2.0 * (tmp1 - tmp2));

	return true;
}

bool BitStream::ReadCompressed( double &output )
{
#ifdef TYPE_CHECKING
	unsigned char ID;
	
	if ( ReadBits( ( unsigned char* ) & ID, sizeof(unsigned char) * 8 ) == false )
		return false;
		
	assert( ID == 21 );
	
#endif

// ReadCompressed using int has no effect on this data format and would make the data bigger!
#ifdef __BITSTREAM_NATIVE_END
	return ReadBits( ( unsigned char* ) & output, sizeof( output ) * 8 );
#else
	return Read( output );
#endif
}

// Sets the read pointer back to the beginning of your data.
void BitStream::ResetReadPointer( void )
{
	readOffset = 0;
}

// Sets the write pointer back to the beginning of your data.
void BitStream::ResetWritePointer( void )
{
	numberOfBitsUsed = 0;
}

// Write a 0
void BitStream::Write0( void )
{
	AddBitsAndReallocate( 1 );
	
	// New bytes need to be zeroed
	
	if ( ( numberOfBitsUsed % 8 ) == 0 )
		data[ numberOfBitsUsed >> 3 ] = 0;
		
	numberOfBitsUsed++;
}

// Write a 1
void BitStream::Write1( void )
{
	AddBitsAndReallocate( 1 );
	
	int numberOfBitsMod8 = numberOfBitsUsed % 8;
	
	if ( numberOfBitsMod8 == 0 )
		data[ numberOfBitsUsed >> 3 ] = 0x80;
	else
		data[ numberOfBitsUsed >> 3 ] |= 0x80 >> ( numberOfBitsMod8 ); // Set the bit to 1
		
	numberOfBitsUsed++;
}

// Returns true if the next data read is a 1, false if it is a 0
bool BitStream::ReadBit( void )
{
#pragma warning( disable : 4800 )
	return ( bool ) ( data[ readOffset >> 3 ] & ( 0x80 >> ( readOffset++ % 8 ) ) );
#pragma warning( default : 4800 )
}

// Align the bitstream to the byte boundary and then write the specified number of bits.
// This is faster than WriteBits but wastes the bits to do the alignment and requires you to call
// SetReadToByteAlignment at the corresponding read position
void BitStream::WriteAlignedBytes( const unsigned char* input,
	const int numberOfBytesToWrite )
{
#ifdef _DEBUG
	assert( numberOfBytesToWrite > 0 );
#endif
	
	AlignWriteToByteBoundary();
	// Allocate enough memory to hold everything
	AddBitsAndReallocate( numberOfBytesToWrite << 3 );
	
	// Write the data
	memcpy( data + ( numberOfBitsUsed >> 3 ), input, numberOfBytesToWrite );
	
	numberOfBitsUsed += numberOfBytesToWrite << 3;
}

// Read bits, starting at the next aligned bits. Note that the modulus 8 starting offset of the
// sequence must be the same as was used with WriteBits. This will be a problem with packet coalescence
// unless you byte align the coalesced packets.
bool BitStream::ReadAlignedBytes( unsigned char* output,
	const int numberOfBytesToRead )
{
#ifdef _DEBUG
	assert( numberOfBytesToRead > 0 );
#endif
	
	if ( numberOfBytesToRead <= 0 )
		return false;
		
	// Byte align
	AlignReadToByteBoundary();
	
	if ( readOffset + ( numberOfBytesToRead << 3 ) > numberOfBitsUsed )
		return false;
		
	// Write the data
	memcpy( output, data + ( readOffset >> 3 ), numberOfBytesToRead );
	
	readOffset += numberOfBytesToRead << 3;
	
	return true;
}

// Align the next write and/or read to a byte boundary.  This can be used to 'waste' bits to byte align for efficiency reasons
void BitStream::AlignWriteToByteBoundary( void )
{
	if ( numberOfBitsUsed )
		numberOfBitsUsed += 8 - ( ( numberOfBitsUsed - 1 ) % 8 + 1 );
}

// Align the next write and/or read to a byte boundary.  This can be used to 'waste' bits to byte align for efficiency reasons
void BitStream::AlignReadToByteBoundary( void )
{
	if ( readOffset )
		readOffset += 8 - ( ( readOffset - 1 ) % 8 + 1 );
}

// Write numberToWrite bits from the input source
void BitStream::WriteBits( const unsigned char *input,
	int numberOfBitsToWrite, const bool rightAlignedBits )
{
	// if (numberOfBitsToWrite<=0)
	//  return;
	
	AddBitsAndReallocate( numberOfBitsToWrite );
	int offset = 0;
	unsigned char dataByte;
	int numberOfBitsUsedMod8;
	
	numberOfBitsUsedMod8 = numberOfBitsUsed % 8;
	
	// Faster to put the while at the top surprisingly enough
	while ( numberOfBitsToWrite > 0 )
		//do
	{
		dataByte = *( input + offset );
		
		if ( numberOfBitsToWrite < 8 && rightAlignedBits )   // rightAlignedBits means in the case of a partial byte, the bits are aligned from the right (bit 0) rather than the left (as in the normal internal representation)
			dataByte <<= 8 - numberOfBitsToWrite;  // shift left to get the bits on the left, as in our internal representation
			
		// Writing to a new byte each time
		if ( numberOfBitsUsedMod8 == 0 )
			* ( data + ( numberOfBitsUsed >> 3 ) ) = dataByte;
		else
		{
			// Copy over the new data.
			*( data + ( numberOfBitsUsed >> 3 ) ) |= dataByte >> ( numberOfBitsUsedMod8 ); // First half
			
			if ( 8 - ( numberOfBitsUsedMod8 ) < 8 && 8 - ( numberOfBitsUsedMod8 ) < numberOfBitsToWrite )   // If we didn't write it all out in the first half (8 - (numberOfBitsUsed%8) is the number we wrote in the first half)
			{
				*( data + ( numberOfBitsUsed >> 3 ) + 1 ) = (unsigned char) ( dataByte << ( 8 - ( numberOfBitsUsedMod8 ) ) ); // Second half (overlaps byte boundary)
			}
		}
		
		if ( numberOfBitsToWrite >= 8 )
			numberOfBitsUsed += 8;
		else
			numberOfBitsUsed += numberOfBitsToWrite;
		
		numberOfBitsToWrite -= 8;
		
		offset++;
	}
	// } while(numberOfBitsToWrite>0);
}

// Set the stream to some initial data.  For internal use
void BitStream::SetData( const unsigned char* input, const int numberOfBits )
{
#ifdef _DEBUG
	assert( numberOfBitsUsed == 0 ); // Make sure the stream is clear
#endif
	
	if ( numberOfBits <= 0 )
		return ;
		
	AddBitsAndReallocate( numberOfBits );
	
	memcpy( data, input, BITS_TO_BYTES( numberOfBits ) );
	
	numberOfBitsUsed = numberOfBits;
}

// Assume the input source points to a native type, compress and write it
void BitStream::WriteCompressed( const unsigned char* input,
	const int size, const bool unsignedData )
{
	int currentByte = ( size >> 3 ) - 1; // PCs
	
	unsigned char byteMatch;
	
	if ( unsignedData )
	{
		byteMatch = 0;
	}
	
	else
	{
		byteMatch = 0xFF;
	}
	
	// Write upper bytes with a single 1
	// From high byte to low byte, if high byte is a byteMatch then write a 1 bit. Otherwise write a 0 bit and then write the remaining bytes
	while ( currentByte > 0 )
	{
		if ( input[ currentByte ] == byteMatch )   // If high byte is byteMatch (0 of 0xff) then it would have the same value shifted
		{
			bool b = true;
			Write( b );
		}
		else
		{
			// Write the remainder of the data after writing 0
			bool b = false;
			Write( b );
			
			WriteBits( input, ( currentByte + 1 ) << 3, true );
			//  currentByte--;
			
			
			return ;
		}
		
		currentByte--;
	}
	
	// If the upper half of the last byte is a 0 (positive) or 16 (negative) then write a 1 and the remaining 4 bits.  Otherwise write a 0 and the 8 bites.
	if ( ( unsignedData && ( ( *( input + currentByte ) ) & 0xF0 ) == 0x00 ) ||
		( unsignedData == false && ( ( *( input + currentByte ) ) & 0xF0 ) == 0xF0 ) )
	{
		bool b = true;
		Write( b );
		WriteBits( input + currentByte, 4, true );
	}
	
	else
	{
		bool b = false;
		Write( b );
		WriteBits( input + currentByte, 8, true );
	}
}

// Read numberOfBitsToRead bits to the output source
// alignBitsToRight should be set to true to convert internal bitstream data to userdata
// It should be false if you used WriteBits with rightAlignedBits false
bool BitStream::ReadBits( unsigned char* output,
	int numberOfBitsToRead, const bool alignBitsToRight )
{
#ifdef _DEBUG
	assert( numberOfBitsToRead > 0 );
#endif
	// if (numberOfBitsToRead<=0)
	//  return false;
	
	if ( readOffset + numberOfBitsToRead > numberOfBitsUsed )
		return false;
		
	int readOffsetMod8;
	
	int offset = 0;
	
	memset( output, 0, BITS_TO_BYTES( numberOfBitsToRead ) );
	
	readOffsetMod8 = readOffset % 8;
	
	// do
	// Faster to put the while at the top surprisingly enough
	while ( numberOfBitsToRead > 0 )
	{
		*( output + offset ) |= *( data + ( readOffset >> 3 ) ) << ( readOffsetMod8 ); // First half
		
		if ( readOffsetMod8 > 0 && numberOfBitsToRead > 8 - ( readOffsetMod8 ) )   // If we have a second half, we didn't read enough bytes in the first half
			*( output + offset ) |= *( data + ( readOffset >> 3 ) + 1 ) >> ( 8 - ( readOffsetMod8 ) ); // Second half (overlaps byte boundary)
			
		numberOfBitsToRead -= 8;
		
		if ( numberOfBitsToRead < 0 )   // Reading a partial byte for the last byte, shift right so the data is aligned on the right
		{
		
			if ( alignBitsToRight )
				* ( output + offset ) >>= -numberOfBitsToRead;
				
			readOffset += 8 + numberOfBitsToRead;
		}
		else
			readOffset += 8;
			
		offset++;
		
	}
	
	//} while(numberOfBitsToRead>0);
	
	return true;
}

// Assume the input source points to a compressed native type. Decompress and read it
bool BitStream::ReadCompressed( unsigned char* output,
	const int size, const bool unsignedData )
{
	int currentByte = ( size >> 3 ) - 1;
	
	
	unsigned char byteMatch, halfByteMatch;
	
	if ( unsignedData )
	{
		byteMatch = 0;
		halfByteMatch = 0;
	}
	
	else
	{
		byteMatch = 0xFF;
		halfByteMatch = 0xF0;
	}
	
	// Upper bytes are specified with a single 1 if they match byteMatch
	// From high byte to low byte, if high byte is a byteMatch then write a 1 bit. Otherwise write a 0 bit and then write the remaining bytes
	while ( currentByte > 0 )
	{
		// If we read a 1 then the data is byteMatch.
		
		bool b;
		
		if ( Read( b ) == false )
			return false;
			
		if ( b )   // Check that bit
		{
			output[ currentByte ] = byteMatch;
			currentByte--;
		}
		else
		{
			// Read the rest of the bytes
			
			if ( ReadBits( output, ( currentByte + 1 ) << 3 ) == false )
				return false;
				
			return true;
		}
	}
	
	// All but the first bytes are byteMatch.  If the upper half of the last byte is a 0 (positive) or 16 (negative) then what we read will be a 1 and the remaining 4 bits.
	// Otherwise we read a 0 and the 8 bytes
	//assert(readOffset+1 <=numberOfBitsUsed); // If this assert is hit the stream wasn't long enough to read from
	if ( readOffset + 1 > numberOfBitsUsed )
		return false;
		
	bool b;
	
	if ( Read( b ) == false )
		return false;
		
	if ( b )   // Check that bit
	{
	
		if ( ReadBits( output + currentByte, 4 ) == false )
			return false;
			
		output[ currentByte ] |= halfByteMatch; // We have to set the high 4 bits since these are set to 0 by ReadBits
	}
	else
	{
		if ( ReadBits( output + currentByte, 8 ) == false )
			return false;
	}
	
	return true;
}

// Reallocates (if necessary) in preparation of writing numberOfBitsToWrite
void BitStream::AddBitsAndReallocate( const int numberOfBitsToWrite )
{
	if ( numberOfBitsToWrite <= 0 )
		return;

	int newNumberOfBitsAllocated = numberOfBitsToWrite + numberOfBitsUsed;
	
	if ( numberOfBitsToWrite + numberOfBitsUsed > 0 && ( ( numberOfBitsAllocated - 1 ) >> 3 ) < ( ( newNumberOfBitsAllocated - 1 ) >> 3 ) )   // If we need to allocate 1 or more new bytes
	{
#ifdef _DEBUG
		// If this assert hits then we need to specify true for the third parameter in the constructor
		// It needs to reallocate to hold all the data and can't do it unless we allocated to begin with
		assert( copyData == true );
#endif

		// Less memory efficient but saves on news and deletes
		newNumberOfBitsAllocated = ( numberOfBitsToWrite + numberOfBitsUsed ) * 2;
//		int newByteOffset = BITS_TO_BYTES( numberOfBitsAllocated );
		// Use realloc and free so we are more efficient than delete and new for resizing
		int amountToAllocate = BITS_TO_BYTES( newNumberOfBitsAllocated );
		if (data==(unsigned char*)stackData)
		{
			 if (amountToAllocate > BITSTREAM_STACK_ALLOCATION_SIZE)
			 {
				 data = ( unsigned char* ) malloc( amountToAllocate );

				 // need to copy the stack data over to our new memory area too
				 memcpy ((void *)data, (void *)stackData, BITS_TO_BYTES( numberOfBitsAllocated )); 
			 }
		}
		else
		{
			data = ( unsigned char* ) realloc( data, amountToAllocate );
		}

#ifdef _DEBUG
		assert( data ); // Make sure realloc succeeded
#endif
		//  memset(data+newByteOffset, 0,  ((newNumberOfBitsAllocated-1)>>3) - ((numberOfBitsAllocated-1)>>3)); // Set the new data block to 0
	}
	
	if ( newNumberOfBitsAllocated > numberOfBitsAllocated )
		numberOfBitsAllocated = newNumberOfBitsAllocated;
}

// Should hit if reads didn't match writes
void BitStream::AssertStreamEmpty( void )
{
	assert( readOffset == numberOfBitsUsed );
}

void BitStream::PrintBits( void ) const
{
	if ( numberOfBitsUsed <= 0 )
	{
		printf( "No bits\n" );
		return ;
	}
	
	for ( int counter = 0; counter < BITS_TO_BYTES( numberOfBitsUsed ); counter++ )
	{
		int stop;
		
		if ( counter == ( numberOfBitsUsed - 1 ) >> 3 )
			stop = 8 - ( ( ( numberOfBitsUsed - 1 ) % 8 ) + 1 );
		else
			stop = 0;
			
		for ( int counter2 = 7; counter2 >= stop; counter2-- )
		{
			if ( ( data[ counter ] >> counter2 ) & 1 )
				putchar( '1' );
			else
				putchar( '0' );
		}
		
		putchar( ' ' );
	}
	
	putchar( '\n' );
}


// Exposes the data for you to look at, like PrintBits does.
// Data will point to the stream.  Returns the length in bits of the stream.
int BitStream::CopyData( unsigned char** _data ) const
{
#ifdef _DEBUG
	assert( numberOfBitsUsed > 0 );
#endif
	
	*_data = new unsigned char [ BITS_TO_BYTES( numberOfBitsUsed ) ];
	memcpy( *_data, data, sizeof(unsigned char) * ( BITS_TO_BYTES( numberOfBitsUsed ) ) );
	return numberOfBitsUsed;
}

// Ignore data we don't intend to read
void BitStream::IgnoreBits( const int numberOfBits )
{
	readOffset += numberOfBits;
}

// Move the write pointer to a position on the array.  Dangerous if you don't know what you are doing!
void BitStream::SetWriteOffset( const int offset )
{
	numberOfBitsUsed = offset;
}

// Returns the length in bits of the stream
int BitStream::GetNumberOfBitsUsed( void ) const
{
	return numberOfBitsUsed;
}

// Returns the length in bytes of the stream
int BitStream::GetNumberOfBytesUsed( void ) const
{
	return BITS_TO_BYTES( numberOfBitsUsed );
}

// Returns the number of bits into the stream that we have read
int BitStream::GetReadOffset( void ) const
{
	return readOffset;
}

// Returns the number of bits left in the stream that haven't been read
int BitStream::GetNumberOfUnreadBits( void ) const
{
	return numberOfBitsUsed - readOffset;
}

// Exposes the internal data
unsigned char* BitStream::GetData( void ) const
{
	return data;
}

// If we used the constructor version with copy data off, this makes sure it is set to on and the data pointed to is copied.
void BitStream::AssertCopyData( void )
{
	if ( copyData == false )
	{
		copyData = true;
		
		if ( numberOfBitsAllocated > 0 )
		{
			unsigned char * newdata = ( unsigned char* ) malloc( BITS_TO_BYTES( numberOfBitsAllocated ) );
#ifdef _DEBUG
			
			assert( data );
#endif
			
			memcpy( newdata, data, BITS_TO_BYTES( numberOfBitsAllocated ) );
			data = newdata;
		}
		
		else
			data = 0;
	}
}

#endif