700 lines
20 KiB
C++
700 lines
20 KiB
C++
//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 2000.
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//
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// File: hglobal.cxx
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//
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// Contents: Support for Windows/OLE data types for oleprx32.dll.
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// Used to be transmit_as routines, now user_marshal routines.
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//
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// This file contains support for HGLOBAL.
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//
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// Functions:
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// HGLOBAL_UserSize
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// HGLOBAL_UserMarshal
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// HGLOBAL_UserUnmarshal
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// HGLOBAL_UserFree
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// HGLOBAL_UserSize64
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// HGLOBAL_UserMarshal64
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// HGLOBAL_UserUnmarshal64
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// HGLOBAL_UserFree64
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//
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// History: 13-Dec-00 JohnDoty Migrated from transmit.cxx
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//
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//--------------------------------------------------------------------------
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#include "stdrpc.hxx"
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#pragma hdrstop
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#include <oleauto.h>
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#include <objbase.h>
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#include "transmit.hxx"
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#include <rpcwdt.h>
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#include <storext.h>
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#include "widewrap.h"
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#include <valid.h>
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#include <obase.h>
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#include <stream.hxx>
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#include "carefulreader.hxx"
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//+-------------------------------------------------------------------------
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//
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// Function: HGLOBAL_UserSize
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//
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// Synopsis: Get the wire size the HGLOBAL handle and data.
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//
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// Derivation: Conformant struct with a flag field:
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// align + 12 + data size.
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//
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// history: May-95 Ryszardk Created.
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// Dec-98 Ryszardk Ported to 64b.
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//
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//--------------------------------------------------------------------------
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unsigned long __RPC_USER
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HGLOBAL_UserSize (
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unsigned long * pFlags,
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unsigned long Offset,
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HGLOBAL * pGlobal)
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{
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if ( !pGlobal )
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return Offset;
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// userHGLOBAL: the encapsulated union.
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// Discriminant and then handle or pointer from the union arm.
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LENGTH_ALIGN( Offset, 3 );
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// Union discriminent is 4 bytes
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Offset += sizeof( long );
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// Handle represented by a polymorphic type - for inproc case only!
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if ( HGLOBAL_HANDLE_PASSING(*pFlags) )
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{
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LENGTH_ALIGN( Offset, sizeof( HGLOBAL )-1 );
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Offset += sizeof( HGLOBAL );
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}
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else
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Offset += ( sizeof(long) + sizeof(HGLOBAL) );
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if ( ! *pGlobal )
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return Offset;
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if ( HGLOBAL_DATA_PASSING(*pFlags) )
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{
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unsigned long ulDataSize = (ULONG) GlobalSize( *pGlobal );
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Offset += 3 * sizeof(long) + ulDataSize;
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}
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return( Offset );
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}
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//+-------------------------------------------------------------------------
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//
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// Function: HGLOBAL_UserMarshall
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//
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// Synopsis: Marshalls an HGLOBAL object into the RPC buffer.
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//
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// Derivation: Conformant struct with a flag field:
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// align, size, null flag, size, data (bytes, if any)
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//
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// history: May-95 Ryszardk Created.
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// Dec-98 Ryszardk Ported to 64b.
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//
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//--------------------------------------------------------------------------
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unsigned char __RPC_FAR * __RPC_USER
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HGLOBAL_UserMarshal (
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unsigned long * pFlags,
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unsigned char * pBuffer,
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HGLOBAL * pGlobal)
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{
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if ( !pGlobal )
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return pBuffer;
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// We marshal a null handle, too.
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UserNdrDebugOut((UNDR_OUT4, "HGLOBAL_UserMarshal\n"));
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ALIGN( pBuffer, 3 );
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// Discriminant of the encapsulated union and union arm.
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if ( HGLOBAL_DATA_PASSING(*pFlags) )
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{
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unsigned long ulDataSize;
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// userHGLOBAL
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*( PULONG_LV_CAST pBuffer)++ = WDT_DATA_MARKER;
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*( PLONG_LV_CAST pBuffer)++ = HandleToLong( *pGlobal );
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if ( ! *pGlobal )
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return pBuffer;
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// FLAGGED_BYTE_BLOB
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ulDataSize = (ULONG) GlobalSize( *pGlobal );
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*( PULONG_LV_CAST pBuffer)++ = ulDataSize;
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// Handle is the non-null flag
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*( PLONG_LV_CAST pBuffer)++ = HandleToLong( *pGlobal );
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*( PULONG_LV_CAST pBuffer)++ = ulDataSize;
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if( ulDataSize )
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{
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void * pData = GlobalLock( *pGlobal);
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memcpy( pBuffer, pData, ulDataSize );
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GlobalUnlock( *pGlobal);
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}
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pBuffer += ulDataSize;
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}
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else
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{
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// Sending a handle.
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// For WIN64 HGLOBALs, 64 bits may by significant (e.i. GPTR).
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#if defined(_WIN64)
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*( PULONG_LV_CAST pBuffer)++ = WDT_HANDLE64_MARKER;
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ALIGN( pBuffer, 7 );
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*( PHYPER_LV_CAST pBuffer)++ = *(__int64 *)pGlobal;
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#else
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*( PULONG_LV_CAST pBuffer)++ = WDT_HANDLE_MARKER;
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*( PLONG_LV_CAST pBuffer)++ = HandleToLong( *pGlobal );
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#endif
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}
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return( pBuffer );
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}
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//+-------------------------------------------------------------------------
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//
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// Function: WdtpGlobalUnmarshal
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//
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// Synopsis: Unmarshalls an HGLOBAL object from the RPC buffer.
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//
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// Derivation: Conformant struct with a flag field:
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// align, size, null flag, size, data (bytes, if any)
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//
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// Note: Reallocation is forbidden when the hglobal is part of
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// an [in,out] STGMEDIUM in IDataObject::GetDataHere.
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// This affects only data passing with old handles being
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// non null.
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//
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// history: May-95 Ryszardk Created.
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//
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//--------------------------------------------------------------------------
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unsigned char __RPC_FAR * __RPC_USER
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WdtpGlobalUnmarshal (
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unsigned long * pFlags,
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unsigned char * pBuffer,
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HGLOBAL * pGlobal,
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BOOL fCanReallocate,
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ULONG_PTR BufferSize )
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{
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unsigned long ulDataSize, fHandle, UnionDisc;
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HGLOBAL hGlobal;
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// Align the buffer and save the fixup size.
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UCHAR* pBufferStart = pBuffer;
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ALIGN( pBuffer, 3 );
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ULONG_PTR cbFixup = (ULONG_PTR)(pBuffer - pBufferStart);
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// Check for EOB before accessing discriminant and handle.
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CHECK_BUFFER_SIZE( BufferSize, cbFixup + (2 * sizeof( ULONG )) );
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// Get the tag from buffer.
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UnionDisc = *( PULONG_LV_CAST pBuffer)++;
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if ( IS_DATA_MARKER( UnionDisc) )
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{
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// Get the marker from the buffer.
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hGlobal = (HGLOBAL) LongToHandle( *( PLONG_LV_CAST pBuffer)++ );
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// If handle is NULL, we are done.
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if ( ! hGlobal )
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{
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if ( *pGlobal )
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GlobalFree( *pGlobal );
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*pGlobal = NULL;
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return pBuffer;
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}
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// Check for EOB before accessing header.
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CHECK_BUFFER_SIZE( BufferSize, cbFixup + (5 * sizeof( ULONG )) );
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// Get the rest of the header from the buffer.
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ulDataSize = *( PULONG_LV_CAST pBuffer)++;
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HGLOBAL hGlobalDup = (HGLOBAL) LongToHandle( *( PLONG_LV_CAST pBuffer)++ );
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ULONG ulDataSizeDup = *( PULONG_LV_CAST pBuffer)++;
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// Validate the header: handle and size are put on wire twice, make
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// sure both instances of each are the same.
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if ( (hGlobalDup != hGlobal) ||
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(ulDataSizeDup != ulDataSize) )
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RAISE_RPC_EXCEPTION( RPC_X_BAD_STUB_DATA );
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if ( *pGlobal )
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{
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// Check for reallocation
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if ( GlobalSize( *pGlobal ) == ulDataSize )
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hGlobal = *pGlobal;
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else
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{
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if ( fCanReallocate )
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{
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GlobalFree( *pGlobal );
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hGlobal = GlobalAlloc( GMEM_MOVEABLE, ulDataSize );
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}
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else
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{
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if ( GlobalSize(*pGlobal) < ulDataSize )
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{
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RAISE_RPC_EXCEPTION( STG_E_MEDIUMFULL );
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}
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else
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hGlobal = *pGlobal;
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}
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}
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}
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else
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{
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// allocate a new block
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hGlobal = GlobalAlloc( GMEM_MOVEABLE, ulDataSize );
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}
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if ( hGlobal == NULL )
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{
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RAISE_RPC_EXCEPTION(E_OUTOFMEMORY);
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}
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else
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{
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// Check for EOB before accessing data.
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CHECK_BUFFER_SIZE( BufferSize,
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cbFixup + (5 * sizeof( ULONG )) + ulDataSize );
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// Get the data from the buffer.
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void * pData = GlobalLock( hGlobal);
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memcpy( pData, pBuffer, ulDataSize );
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pBuffer += ulDataSize;
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GlobalUnlock( hGlobal);
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}
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}
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else
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{
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// Sending a handle only.
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// Reallocation problem doesn't apply to handle passing.
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if ( IS_HANDLE_MARKER( UnionDisc ) )
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{
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hGlobal = (HGLOBAL) LongToHandle( *( PLONG_LV_CAST pBuffer)++ );
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}
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else if (IS_HANDLE64_MARKER( UnionDisc ) )
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{
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ALIGN( pBuffer, 7 );
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// Must be enough buffer to do alignment fixup.
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CHECK_BUFFER_SIZE( BufferSize, cbFixup +
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(ULONG_PTR) (pBuffer - pBufferStart) + sizeof( __int64 ));
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hGlobal = (HGLOBAL) ( *( PHYPER_LV_CAST pBuffer)++ );
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}
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else
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{
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RAISE_RPC_EXCEPTION( RPC_S_INVALID_TAG );
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}
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if ( *pGlobal != hGlobal && *pGlobal )
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GlobalFree( *pGlobal );
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}
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*pGlobal = hGlobal;
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return( pBuffer );
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}
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//+-------------------------------------------------------------------------
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//
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// Function: HGLOBAL_UserUnmarshall
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//
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// Synopsis: Unmarshalls an HGLOBAL object from the RPC buffer.
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//
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// Derivation: Conformant struct with a flag field:
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// align, size, null flag, size, data (bytes, if any)
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//
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// history: May-95 Ryszardk Created.
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//
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//--------------------------------------------------------------------------
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unsigned char __RPC_FAR * __RPC_USER
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HGLOBAL_UserUnmarshal (
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unsigned long * pFlags,
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unsigned char * pBuffer,
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HGLOBAL * pGlobal)
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{
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// Get the buffer size and the start of the buffer.
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CUserMarshalInfo MarshalInfo( pFlags, pBuffer );
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ULONG_PTR BufferSize = MarshalInfo.GetBufferSize();
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UCHAR* pBufferStart = MarshalInfo.GetBuffer();
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pBuffer = WdtpGlobalUnmarshal( pFlags,
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pBufferStart,
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pGlobal,
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TRUE, // reallocation possible
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BufferSize );
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return( pBuffer );
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}
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//+-------------------------------------------------------------------------
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//
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// Function: HGLOBAL_UserFree
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//
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// Synopsis: Free an HGLOBAL.
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//
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// history: May-95 Ryszardk Created.
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//
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//--------------------------------------------------------------------------
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void __RPC_USER
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HGLOBAL_UserFree(
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unsigned long * pFlags,
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HGLOBAL * pGlobal)
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{
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if( pGlobal && *pGlobal )
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{
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if ( HGLOBAL_DATA_PASSING(*pFlags) )
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GlobalFree( *pGlobal);
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}
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}
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#if defined(_WIN64)
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//+-------------------------------------------------------------------------
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//
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// Function: HGLOBAL_UserSize64
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//
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// Synopsis: Get the wire size the HGLOBAL handle and data.
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//
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// Derivation: Union around a pointer to a conformant struct with a
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// flag field.
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//
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// history: Dec-00 JohnDoty Created from 32bit function
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//
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//--------------------------------------------------------------------------
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unsigned long __RPC_USER
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HGLOBAL_UserSize64 (
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unsigned long * pFlags,
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unsigned long Offset,
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HGLOBAL * pGlobal)
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{
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if ( !pGlobal )
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return Offset;
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// userHGLOBAL: the encapsulated union.
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// Discriminant and then handle or pointer from the union arm.
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// Union discriminent is 4 bytes, but it contains a pointer, so
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// align on union is 8 bytes.
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LENGTH_ALIGN( Offset, 7 );
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Offset += sizeof( long );
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LENGTH_ALIGN( Offset, 7 );
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// Handle represented by a polymorphic type - for inproc case only!
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if ( HGLOBAL_HANDLE_PASSING(*pFlags) )
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{
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// Doesn't matter which arm we take inproc, it's size of native
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// HGLOBAL.
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Offset += sizeof( HGLOBAL );
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}
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else
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{
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// Pointer representation...
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Offset += 8;
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}
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if ( ! *pGlobal )
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return Offset;
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if ( HGLOBAL_DATA_PASSING(*pFlags) )
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{
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// Struct must be aligned on 8, but already aligned on
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// 8...
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unsigned long ulDataSize = (ULONG) GlobalSize( *pGlobal );
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Offset += 8 + 2 * sizeof(long) + ulDataSize;
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}
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return( Offset );
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}
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//+-------------------------------------------------------------------------
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//
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// Function: HGLOBAL_UserMarshal64
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//
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// Synopsis: Marshalls an HGLOBAL object into the RPC buffer.
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//
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// Derivation: Conformant struct with a flag field:
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// align, size, null flag, size, data (bytes, if any)
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//
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// history: Dec-00 JohnDoty Created from 32bit function
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//
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//--------------------------------------------------------------------------
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unsigned char __RPC_FAR * __RPC_USER
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HGLOBAL_UserMarshal64 (
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unsigned long * pFlags,
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unsigned char * pBuffer,
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HGLOBAL * pGlobal)
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{
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if ( !pGlobal )
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return pBuffer;
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// We marshal a null handle, too.
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UserNdrDebugOut((UNDR_OUT4, "HGLOBAL_UserMarshal\n"));
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ALIGN( pBuffer, 7 );
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// Discriminant of the encapsulated union and union arm.
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if ( HGLOBAL_DATA_PASSING(*pFlags) )
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{
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unsigned long ulDataSize;
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// userHGLOBAL
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*( PULONG_LV_CAST pBuffer)++ = WDT_DATA_MARKER;
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ALIGN( pBuffer, 7 );
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*( PHYPER_LV_CAST pBuffer)++ = (hyper)*pGlobal;
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if ( ! *pGlobal )
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return pBuffer;
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// FLAGGED_BYTE_BLOB
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ulDataSize = (ULONG) GlobalSize( *pGlobal );
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*( PHYPER_LV_CAST pBuffer)++ = ulDataSize;
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// Handle is the non-null flag
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*( PLONG_LV_CAST pBuffer)++ = HandleToLong( *pGlobal );
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*( PULONG_LV_CAST pBuffer)++ = ulDataSize;
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if( ulDataSize )
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{
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void * pData = GlobalLock( *pGlobal);
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memcpy( pBuffer, pData, ulDataSize );
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GlobalUnlock( *pGlobal);
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}
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pBuffer += ulDataSize;
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}
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else
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{
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// Sending a handle.
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// For WIN64 HGLOBALs, 64 bits may by significant (e.i. GPTR).
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*( PULONG_LV_CAST pBuffer)++ = WDT_HANDLE64_MARKER;
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ALIGN( pBuffer, 7 );
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*( PHYPER_LV_CAST pBuffer)++ = *(__int64 *)pGlobal;
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}
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return( pBuffer );
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}
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//+-------------------------------------------------------------------------
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//
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// Function: WdtpGlobalUnmarshal64
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//
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// Synopsis: Unmarshalls an HGLOBAL object from the RPC buffer.
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//
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// Derivation: Conformant struct with a flag field:
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// align, size, null flag, size, data (bytes, if any)
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//
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// Note: Reallocation is forbidden when the hglobal is part of
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// an [in,out] STGMEDIUM in IDataObject::GetDataHere.
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|
// This affects only data passing with old handles being
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|
// non null.
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|
//
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|
// history: Dec-00 JohnDoty Created from 32bit function
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//
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//--------------------------------------------------------------------------
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unsigned char __RPC_FAR * __RPC_USER
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WdtpGlobalUnmarshal64 (
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unsigned long * pFlags,
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unsigned char * pBuffer,
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HGLOBAL * pGlobal,
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BOOL fCanReallocate,
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ULONG_PTR BufferSize )
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{
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CarefulBufferReader stream(pBuffer, BufferSize);
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unsigned long ulDataSize, fHandle, UnionDisc;
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HGLOBAL hGlobal;
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// Align the buffer and save the fixup size.
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stream.Align(8);
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// Get the tag from buffer.
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UnionDisc = stream.ReadULONGNA();
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// Get the marker from the buffer.
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hGlobal = (HGLOBAL)stream.ReadHYPER();
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if ( IS_DATA_MARKER(UnionDisc) )
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{
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// If the handle was NULL, return out now.
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if (!hGlobal)
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{
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if (*pGlobal)
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GlobalFree(*pGlobal);
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*pGlobal = NULL;
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return stream.GetBuffer();
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}
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// Get the rest of the header from the buffer.
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ulDataSize = (ULONG)stream.ReadHYPERNA();
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LONG hGlobalDup = stream.ReadLONGNA();
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ULONG ulDataSizeDup = stream.ReadULONGNA();
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// Validate the header: handle and size are put on wire twice, make
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// sure both instances of each are the same.
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if ( (hGlobalDup != HandleToLong(hGlobal)) ||
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(ulDataSizeDup != ulDataSize) )
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RAISE_RPC_EXCEPTION( RPC_X_BAD_STUB_DATA );
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if ( *pGlobal )
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{
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|
// Check for reallocation
|
|
if ( GlobalSize( *pGlobal ) == ulDataSize )
|
|
hGlobal = *pGlobal;
|
|
else
|
|
{
|
|
if ( fCanReallocate )
|
|
{
|
|
GlobalFree( *pGlobal );
|
|
hGlobal = GlobalAlloc( GMEM_MOVEABLE, ulDataSize );
|
|
}
|
|
else
|
|
{
|
|
if ( GlobalSize(*pGlobal) < ulDataSize )
|
|
{
|
|
RAISE_RPC_EXCEPTION( STG_E_MEDIUMFULL );
|
|
}
|
|
else
|
|
hGlobal = *pGlobal;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// allocate a new block
|
|
hGlobal = GlobalAlloc( GMEM_MOVEABLE, ulDataSize );
|
|
}
|
|
|
|
if ( hGlobal == NULL )
|
|
{
|
|
RAISE_RPC_EXCEPTION(E_OUTOFMEMORY);
|
|
}
|
|
else
|
|
{
|
|
// Check for EOB before accessing data.
|
|
stream.CheckSize(ulDataSize);
|
|
|
|
// Get the data from the buffer.
|
|
void * pData = GlobalLock( hGlobal);
|
|
memcpy( pData, stream.GetBuffer(), ulDataSize );
|
|
GlobalUnlock( hGlobal);
|
|
|
|
stream.Advance(ulDataSize);
|
|
}
|
|
}
|
|
else if (IS_HANDLE64_MARKER( UnionDisc ))
|
|
{
|
|
// Make sure the old stuff is cleaned up...
|
|
if ( *pGlobal != hGlobal && *pGlobal )
|
|
GlobalFree( *pGlobal );
|
|
}
|
|
else
|
|
{
|
|
RAISE_RPC_EXCEPTION( RPC_S_INVALID_TAG );
|
|
}
|
|
|
|
*pGlobal = hGlobal;
|
|
|
|
return( stream.GetBuffer() );
|
|
}
|
|
|
|
//+-------------------------------------------------------------------------
|
|
//
|
|
// Function: HGLOBAL_UserUnmarshal64
|
|
//
|
|
// Synopsis: Unmarshalls an HGLOBAL object from the RPC buffer.
|
|
//
|
|
// Derivation: Conformant struct with a flag field:
|
|
// align, size, null flag, size, data (bytes, if any)
|
|
//
|
|
// history: Dec-00 JohnDoty Created from 32bit function
|
|
//
|
|
//--------------------------------------------------------------------------
|
|
|
|
unsigned char __RPC_FAR * __RPC_USER
|
|
HGLOBAL_UserUnmarshal64 (
|
|
unsigned long * pFlags,
|
|
unsigned char * pBuffer,
|
|
HGLOBAL * pGlobal)
|
|
{
|
|
// Get the buffer size and the start of the buffer.
|
|
CUserMarshalInfo MarshalInfo( pFlags, pBuffer );
|
|
ULONG_PTR BufferSize = MarshalInfo.GetBufferSize();
|
|
UCHAR* pBufferStart = MarshalInfo.GetBuffer();
|
|
|
|
pBuffer = WdtpGlobalUnmarshal64( pFlags,
|
|
pBufferStart,
|
|
pGlobal,
|
|
TRUE, // reallocation possible
|
|
BufferSize );
|
|
return( pBuffer );
|
|
}
|
|
|
|
//+-------------------------------------------------------------------------
|
|
//
|
|
// Function: HGLOBAL_UserFree64
|
|
//
|
|
// Synopsis: Free an HGLOBAL.
|
|
//
|
|
// history: Dec-00 JohnDoty Created from 32bit function
|
|
//
|
|
//--------------------------------------------------------------------------
|
|
|
|
void __RPC_USER
|
|
HGLOBAL_UserFree64 (
|
|
unsigned long * pFlags,
|
|
HGLOBAL * pGlobal)
|
|
{
|
|
if( pGlobal && *pGlobal )
|
|
{
|
|
if ( HGLOBAL_DATA_PASSING(*pFlags) )
|
|
GlobalFree( *pGlobal);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|