int32 CFile::Write(CMemoryStream& oStream, int32 nWriteSize)
{
if(nWriteSize <= 0)
return 0;
uint32 nRest = oStream.GetSize() - oStream.GetPosition();
if(nRest < (uint32)nWriteSize)
nWriteSize = nRest;
int32 nRet, nOldCopySize = nWriteSize;
while(nWriteSize)
{
uint32 nBlockSize;
char* pBuf = oStream.GetBuf(nBlockSize);
if(nBlockSize > (uint32)nWriteSize)
nBlockSize = nWriteSize;
nRet = Write(pBuf, nBlockSize);
if(nRet < 0)
{
if(nWriteSize == nOldCopySize)
return nRet;
break;
}
if(nRet == 0)
break;
nWriteSize -= nRet;
oStream.Seek(nRet);
}
return nOldCopySize - nWriteSize;
}
int32 CFile::Read(CMemoryStream& oStream, int32 nReadSize, uint32 nTimeOut)
{
if(nReadSize <= 0)
return 0;
if(oStream.GetSize() == oStream.GetPosition())
{
if(!oStream.ExtendSize(nReadSize))
return 0;
}
uint32 nBlockSize;
char* pBuf = oStream.GetBuf(nBlockSize);
if(nBlockSize > (uint32)nReadSize)
nBlockSize = nReadSize;
int32 nRet = Read(pBuf, nBlockSize, nTimeOut);//???????
if(nRet > 0)
oStream.Seek(nRet);
return nRet;
}
