637 lines
17 KiB
C++
637 lines
17 KiB
C++
|
//+-------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// File: serial.cxx
|
||
|
|
//
|
||
|
|
// Contents: serialization support
|
||
|
|
//
|
||
|
|
// Classes: Serializer
|
||
|
|
//
|
||
|
|
// Functions: Helper class for serialization which holds
|
||
|
|
// serialization state like MES handles, position
|
||
|
|
// in buffer, stream etc. Provides a virtual
|
||
|
|
// buffer for operation but is created from and
|
||
|
|
// commited back to an IStream object.
|
||
|
|
//
|
||
|
|
// History: 24-Jan-98 vinaykr Created
|
||
|
|
// 17-Aug-98 vinaykr Made every method inline
|
||
|
|
// and non-COM class.
|
||
|
|
//
|
||
|
|
//--------------------------------------------------------------------
|
||
|
|
#ifndef __SERIAL_HXX
|
||
|
|
#define __SERIAL_HXX
|
||
|
|
|
||
|
|
|
||
|
|
#include <rpc.h>
|
||
|
|
#include <midles.h>
|
||
|
|
#include <actstrm.hxx>
|
||
|
|
#include <buffer.h>
|
||
|
|
#include <serializ.h>
|
||
|
|
#include <ole2int.h>
|
||
|
|
|
||
|
|
#ifdef _WIN64
|
||
|
|
|
||
|
|
// Flag used to signal the in-proc case for Serialization header marshalling
|
||
|
|
#define INTERNAL_SERIALIZATION_FLAG 0x487fabc
|
||
|
|
|
||
|
|
// Struct used to optimize calls to IStream::Write
|
||
|
|
typedef struct _SSerializationHeader64 {
|
||
|
|
DWORD dwSize;
|
||
|
|
DWORD dwFlag;
|
||
|
|
void *pvMarshalPtr;
|
||
|
|
} SerializationHeader64;
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
typedef struct _SSerializationHeader {
|
||
|
|
DWORD dwSize;
|
||
|
|
void *pvMarshalPtr;
|
||
|
|
} SerializationHeader;
|
||
|
|
|
||
|
|
class Serializer
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
DIRECTION_READ = 0x1,
|
||
|
|
DIRECTION_WRITE = 0x2
|
||
|
|
};
|
||
|
|
|
||
|
|
inline ~Serializer()
|
||
|
|
{
|
||
|
|
// Free MES handle
|
||
|
|
if (_handle!=0)
|
||
|
|
MesHandleFree(_handle);
|
||
|
|
|
||
|
|
// If we have a stream free it
|
||
|
|
if (_pStream)
|
||
|
|
{
|
||
|
|
_pIBuff->Release();
|
||
|
|
_pStream->Release();
|
||
|
|
}
|
||
|
|
|
||
|
|
// If original stream is different free it
|
||
|
|
if ((_pOriginalStream) && (_pOriginalStream != _pStream))
|
||
|
|
_pOriginalStream->Release();
|
||
|
|
}
|
||
|
|
|
||
|
|
inline Serializer()
|
||
|
|
{
|
||
|
|
_bufSize=0;
|
||
|
|
_operationSize=0;
|
||
|
|
_buffer = 0;
|
||
|
|
_nWritten = 0;
|
||
|
|
_position = 0;
|
||
|
|
_start = 0;
|
||
|
|
_pStream = NULL;
|
||
|
|
_pOriginalStream = NULL;
|
||
|
|
_pIBuff = NULL;
|
||
|
|
_handle = 0;
|
||
|
|
_clRefs = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline Serializer(DWORD dwMaxDestCtx, DWORD dwCurrCtx, DWORD dwMarshalFlags)
|
||
|
|
{
|
||
|
|
this->Serializer::Serializer();
|
||
|
|
_dwMaxDestCtx = dwMaxDestCtx;
|
||
|
|
_dwCurrentDestCtx = dwCurrCtx;
|
||
|
|
_dwMarshalFlags = dwMarshalFlags;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline ULONG Serializer::Release(void)
|
||
|
|
{
|
||
|
|
Win4Assert((_clRefs != 0) && "Serializer::Release");
|
||
|
|
|
||
|
|
if (InterlockedDecrement(&_clRefs) == 0)
|
||
|
|
{
|
||
|
|
delete this;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return _clRefs;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/***************************************************************************/
|
||
|
|
/** Initializes state based on stream for serialization **/
|
||
|
|
/** Assumes that we know the limits of our operation before hand if we **/
|
||
|
|
/** writing out to the stream. **/
|
||
|
|
/** Note that it is the responsibility of the caller to ensure that the **/
|
||
|
|
/** variable pMarshalPtr is only passed during in process marshalling **/
|
||
|
|
/** otherwise undefined errors may result. **/
|
||
|
|
/** Note that when writing pMarshalPtr and dwSize are input parameters **/
|
||
|
|
/** and while reading they are output.
|
||
|
|
/***************************************************************************/
|
||
|
|
inline HRESULT InitStream(IStream *pStream,DWORD &dwSize,
|
||
|
|
DWORD direction, void* &pMarshalPtr)
|
||
|
|
{
|
||
|
|
HRESULT hr;
|
||
|
|
DWORD nRead;
|
||
|
|
_direction = direction;
|
||
|
|
_pOriginalStream = pStream;
|
||
|
|
_pOriginalStream->AddRef();
|
||
|
|
|
||
|
|
// Either read or write initial protocol header
|
||
|
|
if (direction == DIRECTION_READ)
|
||
|
|
{
|
||
|
|
SerializationHeader hdr;
|
||
|
|
|
||
|
|
#ifdef _WIN64
|
||
|
|
|
||
|
|
// To maintain compatibility with 32 bit DCOM, we need to maintain the
|
||
|
|
// illusion that SerializationHeader's are 8 bytes in size
|
||
|
|
//
|
||
|
|
// For the in proc case, there will be a DWORD after the dwSize field
|
||
|
|
// that tells us if we are in proc or out of proc. If the DWORD is our
|
||
|
|
// special flag, then we are in-proc and there's an 8 byte pointer that
|
||
|
|
// we need to read from the stream.
|
||
|
|
// For the out of proc case, the DWORD will be zero and we can just ignore
|
||
|
|
// it and set the pvMarshalPtr field to NULL
|
||
|
|
//
|
||
|
|
// -mfeingol, 10/15/1999
|
||
|
|
|
||
|
|
// Read eight bytes from the stream
|
||
|
|
DWORD dwData[2];
|
||
|
|
if ((hr = _pOriginalStream->Read(dwData, 2 * sizeof (DWORD), &nRead)) != S_OK)
|
||
|
|
return hr;
|
||
|
|
|
||
|
|
// Assign the dwSize field
|
||
|
|
hdr.dwSize = dwData[0];
|
||
|
|
|
||
|
|
// Determine if we're in proc or out of proc
|
||
|
|
if (dwData[1] == INTERNAL_SERIALIZATION_FLAG) {
|
||
|
|
|
||
|
|
// In proc case: there's a pointer in the stream
|
||
|
|
if ((hr = _pOriginalStream->Read(&hdr.pvMarshalPtr, sizeof (void*), &nRead)) != S_OK)
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// Out of proc case; the DWORD we read is just a NULL
|
||
|
|
hdr.pvMarshalPtr = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
#else
|
||
|
|
if ((hr = _pOriginalStream->Read(&hdr, GetSize(), &nRead)) != S_OK)
|
||
|
|
return hr;
|
||
|
|
#endif
|
||
|
|
pMarshalPtr = hdr.pvMarshalPtr;
|
||
|
|
|
||
|
|
if (hdr.pvMarshalPtr)
|
||
|
|
{
|
||
|
|
_operationSize = hdr.dwSize;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
BYTE *pSrc = (BYTE*) &hdr.dwSize;
|
||
|
|
_operationSize = 0;
|
||
|
|
for (int i = 0; i<(sizeof(DWORD)/sizeof(BYTE)); i++)
|
||
|
|
{
|
||
|
|
_operationSize |= ((((DWORD)(*pSrc++)) & 0xFF) << (i*8));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
dwSize = _operationSize;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
_operationSize = dwSize;
|
||
|
|
SerializationHeader hdr;
|
||
|
|
hdr.pvMarshalPtr = pMarshalPtr;
|
||
|
|
if (pMarshalPtr)
|
||
|
|
{
|
||
|
|
hdr.dwSize = dwSize;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
BYTE *pDst = (BYTE*) &hdr.dwSize;
|
||
|
|
for (int i = 0; i<(sizeof(DWORD)/sizeof(BYTE)); i++)
|
||
|
|
{
|
||
|
|
*pDst++ = (BYTE)((dwSize>>(i*8)) & 0xFF);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#ifdef _WIN64
|
||
|
|
|
||
|
|
// To maintain compatibility with 32 bit DCOM, we need to maintain the
|
||
|
|
// illusion that SerializationHeader's are 8 bytes in size
|
||
|
|
//
|
||
|
|
// For the in proc case, we write a DWORD after the dwSize field
|
||
|
|
// that tells the reader of the stream that we are in proc. Then we serialize
|
||
|
|
// our 8 byte pointer into the stream.
|
||
|
|
// For the out of proc case, we just write a zero'd DWORD after the dwSize field
|
||
|
|
//
|
||
|
|
// -mfeingol, 10/15/1999
|
||
|
|
|
||
|
|
if (pMarshalPtr)
|
||
|
|
{
|
||
|
|
// Inproc: write the DWORD, a flag, then the ptr
|
||
|
|
SerializationHeader64 sh64Data =
|
||
|
|
{
|
||
|
|
hdr.dwSize,
|
||
|
|
INTERNAL_SERIALIZATION_FLAG,
|
||
|
|
pMarshalPtr
|
||
|
|
};
|
||
|
|
|
||
|
|
if ((hr = _pOriginalStream->Write(&sh64Data, sizeof (SerializationHeader64), &_nWritten)) != S_OK)
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
DWORD dwData[2] =
|
||
|
|
{
|
||
|
|
hdr.dwSize,
|
||
|
|
0
|
||
|
|
};
|
||
|
|
|
||
|
|
// Out of proc: write the DWORD and blank DWORD
|
||
|
|
if ((hr = _pOriginalStream->Write(&dwData, 2 * sizeof (DWORD), &_nWritten)) != S_OK)
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
if ((hr = _pOriginalStream->Write(&hdr, GetSize(), &_nWritten)) != S_OK)
|
||
|
|
return hr;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!_operationSize)
|
||
|
|
{
|
||
|
|
if (!pMarshalPtr)
|
||
|
|
return E_UNEXPECTED;
|
||
|
|
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
// See if given stream supports IBuffer otherwise create one that does
|
||
|
|
IBuffer *pibuff;
|
||
|
|
if (_pOriginalStream->QueryInterface(IID_IBuffer, (void**)&pibuff)!=S_OK)
|
||
|
|
{
|
||
|
|
// allocate more in case alignment needed
|
||
|
|
_bufSize = _operationSize + 8;
|
||
|
|
_pStream = new ActivationStream(_bufSize);
|
||
|
|
if (_pStream==NULL)
|
||
|
|
return E_OUTOFMEMORY;
|
||
|
|
|
||
|
|
hr = _pStream->QueryInterface(IID_IBuffer, (void**)&_pIBuff);
|
||
|
|
ASSERT(hr==S_OK);
|
||
|
|
pibuff = _pIBuff;
|
||
|
|
}
|
||
|
|
|
||
|
|
do // Loop until we get right buffer
|
||
|
|
{
|
||
|
|
// Invariant is that pibuff must exist by the time we get here
|
||
|
|
ASSERT(pibuff != 0);
|
||
|
|
|
||
|
|
// Set up our buffer appropriately
|
||
|
|
if (direction == DIRECTION_READ)
|
||
|
|
{
|
||
|
|
if (pibuff->GetBuffer(&_bufSize, &_buffer)!=S_OK)
|
||
|
|
return E_FAIL;
|
||
|
|
if (_bufSize < _operationSize)
|
||
|
|
return E_FAIL;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if (direction == DIRECTION_WRITE)
|
||
|
|
{
|
||
|
|
if (pibuff->GetOrCreateBuffer(_operationSize+GetSize(),
|
||
|
|
&_bufSize, &_buffer)!=S_OK)
|
||
|
|
return E_FAIL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(((LONG_PTR)_buffer)&0x7)
|
||
|
|
{
|
||
|
|
// If buffer is not 8 byte aligned, do it
|
||
|
|
if (pibuff != _pIBuff)
|
||
|
|
{
|
||
|
|
// Only get here if we are still using original
|
||
|
|
ASSERT(_pIBuff == 0);
|
||
|
|
// So release it and create a new aligned one
|
||
|
|
pibuff->Release();
|
||
|
|
_bufSize = _operationSize + 8;
|
||
|
|
_pStream = new ActivationStream(_bufSize);
|
||
|
|
if (_pStream==NULL)
|
||
|
|
return E_OUTOFMEMORY;
|
||
|
|
|
||
|
|
hr = _pStream->QueryInterface(IID_IBuffer, (void**)&_pIBuff);
|
||
|
|
ASSERT(hr==S_OK);
|
||
|
|
pibuff = _pIBuff; //Continue loop
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// Got a buffer which we can align
|
||
|
|
ASSERT(_pIBuff != 0);
|
||
|
|
pibuff = 0; //Signal end of loop
|
||
|
|
// Align buffer
|
||
|
|
_start = (DWORD)(8-(((DWORD_PTR)_buffer)&7));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// We have an original good one
|
||
|
|
_pIBuff = pibuff;
|
||
|
|
pibuff = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
while (pibuff);
|
||
|
|
|
||
|
|
ASSERT(_pIBuff!=0);
|
||
|
|
// Set position for next operations and set up
|
||
|
|
// internal state correctly
|
||
|
|
hr = _pIBuff->SetPosition(_bufSize, _start);
|
||
|
|
ASSERT(hr == S_OK);
|
||
|
|
_bufSize -= _start;
|
||
|
|
_buffer += _start;
|
||
|
|
_position = 0;
|
||
|
|
|
||
|
|
if (direction==DIRECTION_READ)
|
||
|
|
{
|
||
|
|
if ((_pStream) && (_pOriginalStream != _pStream))
|
||
|
|
{
|
||
|
|
//If what we have is not the original one then we
|
||
|
|
//need to copy data into aligned address from original
|
||
|
|
DWORD nOver=0;
|
||
|
|
do {
|
||
|
|
if ((hr=_pOriginalStream->Read(_buffer+nOver,
|
||
|
|
_operationSize-nOver, &nRead))!= S_OK)
|
||
|
|
return hr;
|
||
|
|
nOver += nRead;
|
||
|
|
}
|
||
|
|
while (nOver<_operationSize);
|
||
|
|
_pOriginalStream->Release();
|
||
|
|
_pOriginalStream = 0; // Don't need original any longer
|
||
|
|
}
|
||
|
|
else
|
||
|
|
_pStream = _pOriginalStream; // Set operating to original
|
||
|
|
|
||
|
|
ASSERT(_pStream!=0);
|
||
|
|
// Create decoding handle for MES operations
|
||
|
|
MesDecodeBufferHandleCreate((char*)_buffer, _bufSize, &_handle);
|
||
|
|
if (_handle == NULL)
|
||
|
|
return E_OUTOFMEMORY;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
_nWritten = 0;
|
||
|
|
// Check if we are still using the orignal stream
|
||
|
|
if (_pStream == 0)
|
||
|
|
_pStream = _pOriginalStream;
|
||
|
|
// Create encoding handle for MES operations
|
||
|
|
MesEncodeFixedBufferHandleCreate((char*)_buffer,
|
||
|
|
_bufSize, &_nWritten, &_handle);
|
||
|
|
if (_handle == NULL)
|
||
|
|
return E_OUTOFMEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/***************************************************************************/
|
||
|
|
/** Sets stream and state for further serialization operations **/
|
||
|
|
/** Assumes that a stream supporting IBuffer is provided. **/
|
||
|
|
/***************************************************************************/
|
||
|
|
inline HRESULT SetStream(IStream *pStream,DWORD dwOpSize,
|
||
|
|
DWORD direction)
|
||
|
|
{
|
||
|
|
// Set up internal state
|
||
|
|
_direction = direction;
|
||
|
|
_pOriginalStream = 0;
|
||
|
|
_pStream = pStream;
|
||
|
|
_operationSize = dwOpSize;
|
||
|
|
_pStream->AddRef();
|
||
|
|
|
||
|
|
// Assume IBuffer exists otherwise fail
|
||
|
|
if (_pStream->QueryInterface(IID_IBuffer, (void**)&_pIBuff)!=S_OK)
|
||
|
|
return E_FAIL;
|
||
|
|
if (_pIBuff->GetBuffer(&_bufSize, &_buffer)!=S_OK)
|
||
|
|
return E_FAIL;
|
||
|
|
if (_bufSize < _operationSize)
|
||
|
|
return E_FAIL;
|
||
|
|
|
||
|
|
// Set up MES handles
|
||
|
|
if (direction==DIRECTION_READ)
|
||
|
|
MesDecodeBufferHandleCreate((char*)_buffer, _bufSize, &_handle);
|
||
|
|
else
|
||
|
|
MesEncodeFixedBufferHandleCreate((char*)_buffer,
|
||
|
|
_bufSize, &_nWritten, &_handle);
|
||
|
|
|
||
|
|
if (_handle == NULL)
|
||
|
|
return E_OUTOFMEMORY;
|
||
|
|
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Gets MES handle
|
||
|
|
inline HRESULT GetSerializationHandle(void *pHandle)
|
||
|
|
{
|
||
|
|
*((handle_t*) pHandle) = _handle;
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Gets MES handle for sizing operations
|
||
|
|
inline HRESULT GetSizingHandle(void *pHandle)
|
||
|
|
{
|
||
|
|
char dummy[30], *dummybuff;
|
||
|
|
unsigned long encodedSize;
|
||
|
|
handle_t handle;
|
||
|
|
dummybuff = (char*)(((LONG_PTR)(&dummy[7])) & ~7);
|
||
|
|
MesEncodeFixedBufferHandleCreate(dummybuff, 100, &encodedSize, (handle_t*)pHandle);
|
||
|
|
if ( (*(handle_t*)pHandle) == NULL)
|
||
|
|
return E_OUTOFMEMORY;
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
//Signals end of operations on this object and commits
|
||
|
|
//operations to stream
|
||
|
|
inline HRESULT Commit()
|
||
|
|
{
|
||
|
|
// If we are not using original and we are writing,
|
||
|
|
// then we need to copy
|
||
|
|
if ((_pOriginalStream) && (_pOriginalStream != _pStream))
|
||
|
|
{
|
||
|
|
ASSERT(_direction==DIRECTION_WRITE);
|
||
|
|
HRESULT hr;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
_nWritten = 0;
|
||
|
|
hr = _pOriginalStream->Write(_buffer,
|
||
|
|
_operationSize, &_nWritten);
|
||
|
|
if (hr != S_OK)
|
||
|
|
break;
|
||
|
|
_operationSize -= _nWritten;
|
||
|
|
_buffer += _nWritten;
|
||
|
|
}
|
||
|
|
while (_operationSize);
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
return _pIBuff->SetPosition(_bufSize, _operationSize);
|
||
|
|
}
|
||
|
|
|
||
|
|
inline HRESULT SetPosition(DWORD dwPos)
|
||
|
|
{
|
||
|
|
// Sets position in buffer and creates appropriate MES handle
|
||
|
|
HRESULT hr = _pIBuff->SetPosition(_bufSize, dwPos);
|
||
|
|
if (hr!=S_OK)
|
||
|
|
return hr;
|
||
|
|
MesHandleFree(_handle);
|
||
|
|
if (_direction == DIRECTION_READ)
|
||
|
|
MesDecodeBufferHandleCreate((char*)(_buffer+dwPos), _bufSize, &_handle);
|
||
|
|
else
|
||
|
|
{
|
||
|
|
_nWritten = 0;
|
||
|
|
MesEncodeFixedBufferHandleCreate((char*)(_buffer+dwPos), _bufSize, &_nWritten, &_handle);
|
||
|
|
}
|
||
|
|
if (_handle == NULL)
|
||
|
|
return E_OUTOFMEMORY;
|
||
|
|
|
||
|
|
_position = dwPos;
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Gets current position in buffer
|
||
|
|
inline HRESULT GetPosition(DWORD *pdwPos)
|
||
|
|
{
|
||
|
|
*pdwPos = _position;
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Increment current position by specified amount in buffer
|
||
|
|
inline HRESULT IncrementPosition(DWORD dwInc)
|
||
|
|
{
|
||
|
|
return SetPosition(_position+dwInc);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Get buffers underlying stream object
|
||
|
|
inline HRESULT GetStream(IStream **ppStream)
|
||
|
|
{
|
||
|
|
_pStream->AddRef();
|
||
|
|
*ppStream = _pStream;
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Get a copy of this object
|
||
|
|
inline HRESULT GetCopy(Serializer **ppSer)
|
||
|
|
{
|
||
|
|
|
||
|
|
HRESULT hr=E_FAIL;
|
||
|
|
IStream *pNewStream;
|
||
|
|
if (_pStream)
|
||
|
|
{
|
||
|
|
ASSERT(_direction==DIRECTION_READ); //No need for any other case right now
|
||
|
|
hr = _pIBuff->SetPosition(_bufSize, 0);
|
||
|
|
ASSERT(hr==S_OK);
|
||
|
|
if (_pOriginalStream) // Still using original so clone
|
||
|
|
{
|
||
|
|
ASSERT(_start==0);
|
||
|
|
ASSERT(_pStream==_pOriginalStream);
|
||
|
|
hr = _pIBuff->SetCopyAlignment(8);
|
||
|
|
ASSERT(hr==S_OK);
|
||
|
|
hr = _pStream->Clone(&pNewStream);
|
||
|
|
if (hr != S_OK)
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
pNewStream = _pStream;
|
||
|
|
}
|
||
|
|
|
||
|
|
Serializer *ser = new Serializer(_dwMaxDestCtx, _dwCurrentDestCtx, _dwMarshalFlags);
|
||
|
|
|
||
|
|
if (ser==NULL)
|
||
|
|
return E_OUTOFMEMORY;
|
||
|
|
|
||
|
|
hr = ser->SetStream(pNewStream, _operationSize, _direction);
|
||
|
|
if (FAILED(hr))
|
||
|
|
goto exit_point;
|
||
|
|
|
||
|
|
hr = ser->SetPosition(_position);
|
||
|
|
if (FAILED(hr))
|
||
|
|
goto exit_point;
|
||
|
|
|
||
|
|
hr = _pIBuff->SetPosition(_bufSize, _position);
|
||
|
|
if (FAILED(hr))
|
||
|
|
goto exit_point;
|
||
|
|
|
||
|
|
*ppSer = ser;
|
||
|
|
|
||
|
|
exit_point:
|
||
|
|
if (pNewStream != _pStream)
|
||
|
|
pNewStream->Release();
|
||
|
|
|
||
|
|
if (FAILED(hr))
|
||
|
|
{
|
||
|
|
ser->Release();
|
||
|
|
*ppSer = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Write provided buffer into our buffer at current position
|
||
|
|
// and advance position
|
||
|
|
inline HRESULT Write(BYTE *buff, DWORD nBytes)
|
||
|
|
{
|
||
|
|
ASSERT(nBytes<=(_bufSize-_position));
|
||
|
|
memcpy(_buffer+_position,buff, (size_t) nBytes);
|
||
|
|
IncrementPosition(nBytes);
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Copy into provided Serializer our data at given position and length
|
||
|
|
inline HRESULT CopyTo(Serializer *pSer, DWORD dwPos, DWORD nBytes)
|
||
|
|
{
|
||
|
|
ASSERT(nBytes<=(_bufSize-dwPos));
|
||
|
|
return pSer->Write(_buffer+dwPos, nBytes);
|
||
|
|
}
|
||
|
|
|
||
|
|
// return buffer starting at current position
|
||
|
|
inline HRESULT GetBufferAtCurrent(BYTE **ppBuff)
|
||
|
|
{
|
||
|
|
*ppBuff = _buffer+_position;
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline void GetMaxDestCtx(OUT DWORD *pdwDestCtx)
|
||
|
|
{
|
||
|
|
*pdwDestCtx = _dwMaxDestCtx;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline void GetCurrDestCtx(OUT DWORD *pdwDestCtx)
|
||
|
|
{
|
||
|
|
*pdwDestCtx = _dwCurrentDestCtx;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline void GetMarshalFlags(OUT DWORD *pdwMarshalFlags)
|
||
|
|
{
|
||
|
|
*pdwMarshalFlags = _dwMarshalFlags;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline DWORD GetSize()
|
||
|
|
{
|
||
|
|
// fixed initialization length
|
||
|
|
return sizeof(SerializationHeader);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
private:
|
||
|
|
IStream *_pStream;
|
||
|
|
IStream *_pOriginalStream;
|
||
|
|
IBuffer *_pIBuff;
|
||
|
|
BYTE *_buffer;
|
||
|
|
DWORD _nWritten;
|
||
|
|
DWORD _bufSize;
|
||
|
|
DWORD _operationSize;
|
||
|
|
handle_t _handle;
|
||
|
|
LONG _clRefs;
|
||
|
|
DWORD _direction;
|
||
|
|
DWORD _position;
|
||
|
|
DWORD _start;
|
||
|
|
DWORD _dwMaxDestCtx;
|
||
|
|
DWORD _dwCurrentDestCtx;
|
||
|
|
DWORD _dwMarshalFlags;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif //__SERIAL_HXX__
|