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#include "UnityPrefix.h"
#if ENABLE_PHYSICS
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "nxmemorystream.h"
#include "Runtime/Allocator/MemoryMacros.h"
#define BLOCKSIZE 4096
MemoryStream::MemoryStream(NxU8* data,NxU32 len)
{
if ( data )
{
mBuffer = data;
mMyAlloc = false;
}
else
{
mBuffer = (NxU8 *) UNITY_MALLOC(kMemFile, sizeof(NxU8)*len);
mMyAlloc = true;
}
mReadLoc = 0;
mWriteLoc = 0;
mLen = len;
}
MemoryStream::~MemoryStream(void)
{
if ( mMyAlloc )
{
UNITY_FREE(kMemFile, mBuffer);
}
}
NxU8 MemoryStream::readByte(void) const
{
NxU8 ret = 0;
readBuffer(&ret, sizeof(NxU8) );
return ret;
}
NxU16 MemoryStream::readWord(void) const
{
NxU16 ret = 0;
readBuffer(&ret,sizeof(NxU16));
return ret;
}
NxU32 MemoryStream::readDword(void) const
{
NxU32 ret = 0;
readBuffer(&ret,sizeof(NxU32));
return ret;
}
float MemoryStream::readFloat(void) const
{
float ret = 0;
readBuffer(&ret,sizeof(float));
return ret;
}
double MemoryStream::readDouble(void) const
{
double ret = 0;
readBuffer(&ret,sizeof(double));
return ret;
}
void MemoryStream::readBuffer(void* buffer, NxU32 size) const
{
if ( (mReadLoc+size) <= mLen )
{
memcpy( buffer, &mBuffer[mReadLoc], size );
mReadLoc+=size;
}
}
NxStream& MemoryStream::storeByte(NxU8 b)
{
storeBuffer(&b, sizeof(NxU8) );
return *this;
}
NxStream& MemoryStream::storeWord(NxU16 w)
{
storeBuffer(&w,sizeof(NxU16));
return *this;
}
NxStream& MemoryStream::storeDword(NxU32 d)
{
storeBuffer(&d,sizeof(NxU32));
return *this;
}
NxStream& MemoryStream::storeFloat(NxReal f)
{
storeBuffer(&f,sizeof(NxReal));
return *this;
}
NxStream& MemoryStream::storeDouble(NxF64 f)
{
storeBuffer(&f,sizeof(NxF64));
return *this;
}
NxStream& MemoryStream::storeBuffer(const void* buffer, NxU32 size)
{
if ( (mWriteLoc+size) >= mLen )
{
unsigned int blocksize = BLOCKSIZE;
if ( size > BLOCKSIZE ) blocksize = size*2;
NxU8 *buf = (NxU8 *)UNITY_MALLOC(kMemFile, mLen+blocksize);
memcpy(buf,mBuffer,mWriteLoc);
UNITY_FREE(kMemFile, mBuffer);
mBuffer = buf;
mLen+=blocksize;
}
memcpy(&mBuffer[mWriteLoc], buffer, size );
mWriteLoc+=size;
return *this;
}
#endif //ENABLE_PHYSICS
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