usrmarshal.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

        *(ULONG *)pBuffer = WDT_REMOTE_CALL;
        pBuffer += sizeof(ULONG);
        *(ULONG *)pBuffer = (ULONG)(ULONG_PTR)*phmf;
        pBuffer += sizeof(ULONG);

        if (*phmf)
        {
            UINT mfsize = GetMetaFileBitsEx(*phmf, 0, NULL);

            *(ULONG *)pBuffer = mfsize;
            pBuffer += sizeof(ULONG);
            *(ULONG *)pBuffer = mfsize;
            pBuffer += sizeof(ULONG);
            GetMetaFileBitsEx(*phmf, mfsize, pBuffer);
            pBuffer += mfsize;
        }
    }

    return pBuffer;
}

/******************************************************************************
 *           HMETAFILE_UserUnmarshal [OLE32.@]
 *
 * Unmarshals a metafile from a buffer.
 *
 * PARAMS
 *  pFlags   [I] Flags. See notes.
 *  pBuffer  [I] Buffer to marshal the clip format from.
 *  phmf     [O] Address that receive the unmarshaled metafile.
 *
 * RETURNS
 *  The end of the marshaled data in the buffer.
 *
 * NOTES
 *  Even though the function is documented to take a pointer to an ULONG in
 *  pFlags, it actually takes a pointer to a USER_MARSHAL_CB structure, of which
 *  the first parameter is an ULONG.
 *  This function is only intended to be called by the RPC runtime.
 */
unsigned char * __RPC_USER HMETAFILE_UserUnmarshal(ULONG *pFlags, unsigned char *pBuffer, HMETAFILE *phmf)
{
    ULONG fContext;

    TRACE("(%s, %p, %p\n", debugstr_user_flags(pFlags), pBuffer, phmf);

    ALIGN_POINTER(pBuffer, 3);

    fContext = *(ULONG *)pBuffer;
    pBuffer += sizeof(ULONG);

    if (((fContext == WDT_INPROC_CALL) && (sizeof(*phmf) < 8)) ||
        ((fContext == WDT_INPROC64_CALL) && (sizeof(*phmf) == 8)))
    {
        *phmf = *(HMETAFILE *)pBuffer;
        pBuffer += sizeof(*phmf);
    }
    else if (fContext == WDT_REMOTE_CALL)
    {
        ULONG handle;

        handle = *(ULONG *)pBuffer;
        pBuffer += sizeof(ULONG);

        if (handle)
        {
            ULONG size;
            size = *(ULONG *)pBuffer;
            pBuffer += sizeof(ULONG);
            if (size != *(ULONG *)pBuffer)
            {
                RaiseException(RPC_X_BAD_STUB_DATA, 0, 0, NULL);
                return pBuffer;
            }
            pBuffer += sizeof(ULONG);
            *phmf = SetMetaFileBitsEx(size, pBuffer);
            pBuffer += size;
        }
        else
            *phmf = NULL;
    }
    else
        RaiseException(RPC_S_INVALID_TAG, 0, 0, NULL);

    return pBuffer;
}

/******************************************************************************
 *           HMETAFILE_UserFree [OLE32.@]
 *
 * Frees an unmarshaled metafile.
 *
 * PARAMS
 *  pFlags   [I] Flags. See notes.
 *  phmf     [I] Metafile to free.
 *
 * RETURNS
 *  The end of the marshaled data in the buffer.
 *
 * NOTES
 *  Even though the function is documented to take a pointer to a ULONG in
 *  pFlags, it actually takes a pointer to a USER_MARSHAL_CB structure, of
 *  which the first parameter is a ULONG.
 *  This function is only intended to be called by the RPC runtime.
 */
void __RPC_USER HMETAFILE_UserFree(ULONG *pFlags, HMETAFILE *phmf)
{
    TRACE("(%s, &%p\n", debugstr_user_flags(pFlags), *phmf);

    if (LOWORD(*pFlags) != MSHCTX_INPROC)
        DeleteMetaFile(*phmf);
}

/******************************************************************************
*           HENHMETAFILE_UserSize [OLE32.@]
*
* Calculates the buffer size required to marshal an enhanced metafile.
*
* PARAMS
*  pFlags       [I] Flags. See notes.
*  StartingSize [I] Starting size of the buffer. This value is added on to
*                   the buffer size required for the clip format.
*  phEmf        [I] Enhanced metafile to size.
*
* RETURNS
*  The buffer size required to marshal an enhanced metafile plus the starting size.
*
* NOTES
*  Even though the function is documented to take a pointer to a ULONG in
*  pFlags, it actually takes a pointer to a USER_MARSHAL_CB structure, of which
*  the first parameter is a ULONG.
*  This function is only intended to be called by the RPC runtime.
*/
ULONG __RPC_USER HENHMETAFILE_UserSize(ULONG *pFlags, ULONG StartingSize, HENHMETAFILE *phEmf)
{
    ULONG size = StartingSize;

    TRACE("(%s, %d, %p\n", debugstr_user_flags(pFlags), StartingSize, *phEmf);

    size += sizeof(ULONG);
    if (LOWORD(*pFlags) == MSHCTX_INPROC)
        size += sizeof(ULONG_PTR);
    else
    {
        size += sizeof(ULONG);

        if (*phEmf)
        {
            UINT emfsize;
    
            size += 2 * sizeof(ULONG);
            emfsize = GetEnhMetaFileBits(*phEmf, 0, NULL);
            size += emfsize;
        }
    }

    return size;
}

/******************************************************************************
 *           HENHMETAFILE_UserMarshal [OLE32.@]
 *
 * Marshals an enhance metafile into a buffer.
 *
 * PARAMS
 *  pFlags  [I] Flags. See notes.
 *  pBuffer [I] Buffer to marshal the clip format into.
 *  phEmf   [I] Enhanced metafile to marshal.
 *
 * RETURNS
 *  The end of the marshaled data in the buffer.
 *
 * NOTES
 *  Even though the function is documented to take a pointer to a ULONG in
 *  pFlags, it actually takes a pointer to a USER_MARSHAL_CB structure, of which
 *  the first parameter is a ULONG.
 *  This function is only intended to be called by the RPC runtime.
 */
unsigned char * __RPC_USER HENHMETAFILE_UserMarshal(ULONG *pFlags, unsigned char *pBuffer, HENHMETAFILE *phEmf)
{
    TRACE("(%s, %p, &%p\n", debugstr_user_flags(pFlags), pBuffer, *phEmf);

    if (LOWORD(*pFlags) == MSHCTX_INPROC)
    {
        if (sizeof(*phEmf) == 8)
            *(ULONG *)pBuffer = WDT_INPROC64_CALL;
        else
            *(ULONG *)pBuffer = WDT_INPROC_CALL;
        pBuffer += sizeof(ULONG);
        *(HENHMETAFILE *)pBuffer = *phEmf;
        pBuffer += sizeof(HENHMETAFILE);
    }
    else
    {
        *(ULONG *)pBuffer = WDT_REMOTE_CALL;
        pBuffer += sizeof(ULONG);
        *(ULONG *)pBuffer = (ULONG)(ULONG_PTR)*phEmf;
        pBuffer += sizeof(ULONG);
    
        if (*phEmf)
        {
            UINT emfsize = GetEnhMetaFileBits(*phEmf, 0, NULL);
    
            *(ULONG *)pBuffer = emfsize;
            pBuffer += sizeof(ULONG);
            *(ULONG *)pBuffer = emfsize;
            pBuffer += sizeof(ULONG);
            GetEnhMetaFileBits(*phEmf, emfsize, pBuffer);
            pBuffer += emfsize;
        }
    }

    return pBuffer;
}

/******************************************************************************
 *           HENHMETAFILE_UserUnmarshal [OLE32.@]
 *
 * Unmarshals an enhanced metafile from a buffer.
 *
 * PARAMS
 *  pFlags   [I] Flags. See notes.
 *  pBuffer  [I] Buffer to marshal the clip format from.
 *  phEmf    [O] Address that receive the unmarshaled enhanced metafile.
 *
 * RETURNS
 *  The end of the marshaled data in the buffer.
 *
 * NOTES
 *  Even though the function is documented to take a pointer to an ULONG in
 *  pFlags, it actually takes a pointer to a USER_MARSHAL_CB structure, of which
 *  the first parameter is an ULONG.
 *  This function is only intended to be called by the RPC runtime.
 */
unsigned char * __RPC_USER HENHMETAFILE_UserUnmarshal(ULONG *pFlags, unsigned char *pBuffer, HENHMETAFILE *phEmf)
{
    ULONG fContext;

    TRACE("(%s, %p, %p\n", debugstr_user_flags(pFlags), pBuffer, phEmf);

    fContext = *(ULONG *)pBuffer;
    pBuffer += sizeof(ULONG);

    if (((fContext == WDT_INPROC_CALL) && (sizeof(*phEmf) < 8)) ||
        ((fContext == WDT_INPROC64_CALL) && (sizeof(*phEmf) == 8)))
    {
        *phEmf = *(HENHMETAFILE *)pBuffer;
        pBuffer += sizeof(*phEmf);
    }
    else if (fContext == WDT_REMOTE_CALL)
    {
        ULONG handle;

        handle = *(ULONG *)pBuffer;
        pBuffer += sizeof(ULONG);

        if (handle)
        {
            ULONG size;
            size = *(ULONG *)pBuffer;
            pBuffer += sizeof(ULONG);
            if (size != *(ULONG *)pBuffer)
            {
                RaiseException(RPC_X_BAD_STUB_DATA, 0, 0, NULL);
                return pBuffer;
            }
            pBuffer += sizeof(ULONG);
            *phEmf = SetEnhMetaFileBits(size, pBuffer);
            pBuffer += size;
        }
        else 
            *phEmf = NULL;
    }
    else
        RaiseException(RPC_S_INVALID_TAG, 0, 0, NULL);

    return pBuffer;
}

/******************************************************************************
 *           HENHMETAFILE_UserFree [OLE32.@]
 *
 * Frees an unmarshaled enhanced metafile.
 *
 * PARAMS
 *  pFlags   [I] Flags. See notes.
 *  phEmf    [I] Enhanced metafile to free.
 *
 * RETURNS
 *  The end of the marshaled data in the buffer.
 *
 * NOTES
 *  Even though the function is documented to take a pointer to a ULONG in
 *  pFlags, it actually takes a pointer to a USER_MARSHAL_CB structure, of
 *  which the first parameter is a ULONG.
 *  This function is only intended to be called by the RPC runtime.
 */
void __RPC_USER HENHMETAFILE_UserFree(ULONG *pFlags, HENHMETAFILE *phEmf)
{
    TRACE("(%s, &%p\n", debugstr_user_flags(pFlags), *phEmf);

    if (LOWORD(*pFlags) != MSHCTX_INPROC)
        DeleteEnhMetaFile(*phEmf);
}

/******************************************************************************
 *           HMETAFILEPICT_UserSize [OLE32.@]
 *
 * Calculates the buffer size required to marshal an metafile pict.
 *
 * PARAMS
 *  pFlags       [I] Flags. See notes.
 *  StartingSize [I] Starting size of the buffer. This value is added on to
 *                   the buffer size required for the clip format.
 *  phMfp        [I] Metafile pict to size.
 *
 * RETURNS
 *  The buffer size required to marshal a metafile pict plus the starting size.
 *
 * NOTES
 *  Even though the function is documented to take a pointer to a ULONG in
 *  pFlags, it actually takes a pointer to a USER_MARSHAL_CB structure, of which
 *  the first parameter is a ULONG.
 *  This function is only intended to be called by the RPC runtime.
 */
ULONG __RPC_USER HMETAFILEPICT_UserSize(ULONG *pFlags, ULONG StartingSize, HMETAFILEPICT *phMfp)
{
    ULONG size = StartingSize;

    TRACE("(%s, %d, &%p)\n", debugstr_user_flags(pFlags), StartingSize, *phMfp);

    size += sizeof(ULONG);
    size += sizeof(HMETAFILEPICT);

    if ((LOWORD(*pFlags) != MSHCTX_INPROC) && *phMfp)
    {
        METAFILEPICT *mfpict = GlobalLock(*phMfp);

        /* FIXME: raise an exception if mfpict is NULL? */
        size += FIELD_OFFSET(remoteMETAFILEPICT, hMF);
        size += sizeof(ULONG);

        size = HMETAFILE_UserSize(pFlags, size, &mfpict->hMF);

        GlobalUnlock(*phMfp);
    }

    return size;
}

/******************************************************************************
 *           HMETAFILEPICT_UserMarshal [OLE32.@]
 *
 * Marshals a metafile pict into a buffer.
 *
 * PARAMS
 *  pFlags  [I] Flags. See notes.
 *  pBuffer [I] Buffer to marshal the clip format into.
 *  phMfp   [I] Metafile pict to marshal.
 *
 * RETURNS
 *  The end of the marshaled data in the buffer.
 *
 * NOTES
 *  Even though the function is documented to take a pointer to a ULONG in
 *  pFlags, it actually takes a pointer to a USER_MARSHAL_CB structure, of which
 *  the first parameter is a ULONG.
 *  This function is only intended to be called by the RPC runtime.
 */
unsigned char * __RPC_USER HMETAFILEPICT_UserMarshal(ULONG *pFlags, unsigned char *pBuffer, HMETAFILEPICT *phMfp)
{
    TRACE("(%s, %p, &%p)\n", debugstr_user_flags(pFlags), pBuffer, *phMfp);

    if (LOWORD(*pFlags) == MSHCTX_INPROC)
        *(ULONG *)pBuffer = WDT_INPROC_CALL;
    else
        *(ULONG *)pBuffer = WDT_REMOTE_CALL;
    pBuffer += sizeof(ULONG);

    *(HMETAFILEPICT *)pBuffer = *phMfp;
    pBuffer += sizeof(HMETAFILEPICT);

    if ((LOWORD(*pFlags) != MSHCTX_INPROC) && *phMfp)
    {
        METAFILEPICT *mfpict = GlobalLock(*phMfp);
        remoteMETAFILEPICT * remmfpict = (remoteMETAFILEPICT *)pBuffer;

        /* FIXME: raise an exception if mfpict is NULL? */
        remmfpict->mm = mfpict->mm;
        remmfpict->xExt = mfpict->xExt;
        remmfpict->yExt = mfpict->yExt;
        pBuffer += FIELD_OFFSET(remoteMETAFILEPICT, hMF);
        *(ULONG *)pBuffer = USER_MARSHAL_PTR_PREFIX;
        pBuffer += sizeof(ULONG);

        pBuffer = HMETAFILE_UserMarshal(pFlags, pBuffer, &mfpict->hMF);

        GlobalUnlock(*phMfp);
    }

    return pBuffer;
}

/******************************************************************************
 *           HMETAFILEPICT_UserUnmarshal [OLE32.@]
 *
 * Unmarshals an metafile pict from a buffer.
 *
 * PARAMS
 *  pFlags   [I] Flags. See notes.
 *  pBuffer  [I] Buffer to marshal the clip format from.
 *  phMfp    [O] Address that receive the unmarshaled metafile pict.
 *
 * RETURNS
 *  The end of the marshaled data in the buffer.
 *
 * NOTES
 *  Even though the function is documented to take a pointer to an ULONG in
 *  pFlags, it actually takes a pointer to a USER_MARSHAL_CB structure, of which
 *  the first parameter is an ULONG.
 *  This function is only intended to be called by the RPC runtime.
 */
unsigned char * __RPC_USER HMETAFILEPICT_UserUnmarshal(ULONG *pFlags, unsigned char *pBuffer, HMETAFILEPICT *phMfp)
{
    ULONG fContext;

    TRACE("(%s, %p, %p)\n", debugstr_user_flags(pFlags), pBuffer, phMfp);

    fContext = *(ULONG *)pBuffer;
    pBuffer += sizeof(ULONG);

    if ((fContext == WDT_INPROC_CALL) || !*(HMETAFILEPICT *)pBuffer)
    {
        *phMfp = *(HMETAFILEPICT *)pBuffer;
        pBuffer += sizeof(HMETAFILEPICT);
    }
    else
    {
        METAFILEPICT *mfpict;
        const remoteMETAFILEPICT *remmfpict;
        ULONG user_marshal_prefix;

        pBuffer += sizeof(HMETAFILEPICT);
        remmfpict = (const remoteMETAFILEPICT *)pBuffer;

        *phMfp = GlobalAlloc(GMEM_MOVEABLE, sizeof(METAFILEPICT));
        if (!*phMfp)
            RpcRaiseException(E_OUTOFMEMORY);

        mfpict = GlobalLock(*phMfp);
        mfpict->mm = remmfpict->mm;
        mfpict->xExt = remmfpict->xExt;
        mfpict->yExt = remmfpict->yExt;
        pBuffer += FIELD_OFFSET(remoteMETAFILEPICT, hMF);
        user_marshal_prefix = *(ULONG *)pBuffer;
        pBuffer += sizeof(ULONG);

        if (user_marshal_prefix != USER_MARSHAL_PTR_PREFIX)
            RpcRaiseException(RPC_X_INVALID_TAG);

        pBuffer = HMETAFILE_UserUnmarshal(pFlags, pBuffer, &mfpict->hMF);

        GlobalUnlock(*phMfp);
    }

    return pBuffer;