5331 lines
137 KiB
C
5331 lines
137 KiB
C
/*
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* Compound Storage (32 bit version)
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* Storage implementation
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*
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* This file contains the compound file implementation
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* of the storage interface.
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*
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* Copyright 1999 Francis Beaudet
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* Copyright 1999 Sylvain St-Germain
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* Copyright 1999 Thuy Nguyen
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*/
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#include <assert.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "winbase.h"
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#include "winerror.h"
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#include "wine/obj_storage.h"
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#include "wine/winestring.h"
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#include "crtdll.h"
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#include "tchar.h"
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#include "debug.h"
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#include "windef.h"
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#include "storage32.h"
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#define FILE_BEGIN 0
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static const char rootPropertyName[] = "Root Entry";
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/***********************************************************************
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* Forward declaration of internal functions used by the method DestroyElement
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*/
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static HRESULT deleteStorageProperty(
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StorageImpl *parentStorage,
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OLECHAR *propertyToDeleteName);
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static HRESULT deleteStreamProperty(
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StorageImpl *parentStorage,
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ULONG foundPropertyIndexToDelete,
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StgProperty propertyToDelete);
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static HRESULT findPlaceholder(
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StorageImpl *storage,
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ULONG propertyIndexToStore,
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ULONG storagePropertyIndex,
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INT typeOfRelation);
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static HRESULT adjustPropertyChain(
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StorageImpl *This,
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StgProperty propertyToDelete,
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StgProperty parentProperty,
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ULONG parentPropertyId,
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INT typeOfRelation);
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/***********************************************************************
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* Declaration of the functions used to manipulate StgProperty
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*/
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static ULONG getFreeProperty(
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StorageImpl *storage);
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static void updatePropertyChain(
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StorageImpl *storage,
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ULONG newPropertyIndex,
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StgProperty newProperty);
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static LONG propertyNameCmp(
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OLECHAR *newProperty,
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OLECHAR *currentProperty);
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/***********************************************************************
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* Declaration of miscellaneous functions...
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*/
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static HRESULT validateSTGM(DWORD stgmValue);
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static DWORD GetShareModeFromSTGM(DWORD stgm);
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static DWORD GetAccessModeFromSTGM(DWORD stgm);
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static DWORD GetCreationModeFromSTGM(DWORD stgm);
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/*
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* Virtual function table for the IStorage32Impl class.
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*/
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static ICOM_VTABLE(IStorage) Storage32Impl_Vtbl =
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{
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StorageBaseImpl_QueryInterface,
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StorageBaseImpl_AddRef,
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StorageBaseImpl_Release,
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StorageBaseImpl_CreateStream,
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StorageBaseImpl_OpenStream,
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StorageImpl_CreateStorage,
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StorageBaseImpl_OpenStorage,
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StorageImpl_CopyTo,
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StorageImpl_MoveElementTo,
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StorageImpl_Commit,
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StorageImpl_Revert,
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StorageBaseImpl_EnumElements,
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StorageImpl_DestroyElement,
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StorageBaseImpl_RenameElement,
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StorageImpl_SetElementTimes,
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StorageBaseImpl_SetClass,
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StorageImpl_SetStateBits,
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StorageBaseImpl_Stat
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};
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/*
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* Virtual function table for the Storage32InternalImpl class.
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*/
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static ICOM_VTABLE(IStorage) Storage32InternalImpl_Vtbl =
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{
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StorageBaseImpl_QueryInterface,
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StorageBaseImpl_AddRef,
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StorageBaseImpl_Release,
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StorageBaseImpl_CreateStream,
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StorageBaseImpl_OpenStream,
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StorageImpl_CreateStorage,
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StorageBaseImpl_OpenStorage,
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StorageImpl_CopyTo,
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StorageImpl_MoveElementTo,
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StorageInternalImpl_Commit,
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StorageInternalImpl_Revert,
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StorageBaseImpl_EnumElements,
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StorageImpl_DestroyElement,
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StorageBaseImpl_RenameElement,
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StorageImpl_SetElementTimes,
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StorageBaseImpl_SetClass,
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StorageImpl_SetStateBits,
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StorageBaseImpl_Stat
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};
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/*
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* Virtual function table for the IEnumSTATSTGImpl class.
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*/
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static ICOM_VTABLE(IEnumSTATSTG) IEnumSTATSTGImpl_Vtbl =
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{
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IEnumSTATSTGImpl_QueryInterface,
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IEnumSTATSTGImpl_AddRef,
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IEnumSTATSTGImpl_Release,
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IEnumSTATSTGImpl_Next,
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IEnumSTATSTGImpl_Skip,
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IEnumSTATSTGImpl_Reset,
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IEnumSTATSTGImpl_Clone
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};
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/************************************************************************
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** Storage32BaseImpl implementatiion
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*/
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/************************************************************************
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* Storage32BaseImpl_QueryInterface (IUnknown)
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*
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* This method implements the common QueryInterface for all IStorage32
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* implementations contained in this file.
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*
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* See Windows documentation for more details on IUnknown methods.
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*/
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HRESULT WINAPI StorageBaseImpl_QueryInterface(
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IStorage* iface,
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REFIID riid,
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void** ppvObject)
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{
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ICOM_THIS(StorageBaseImpl,iface);
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/*
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* Perform a sanity check on the parameters.
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*/
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if ( (This==0) || (ppvObject==0) )
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return E_INVALIDARG;
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/*
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* Initialize the return parameter.
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*/
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*ppvObject = 0;
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/*
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* Compare the riid with the interface IDs implemented by this object.
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*/
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if (memcmp(&IID_IUnknown, riid, sizeof(IID_IUnknown)) == 0)
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{
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*ppvObject = (IStorage*)This;
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}
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else if (memcmp(&IID_IStorage, riid, sizeof(IID_IStorage)) == 0)
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{
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*ppvObject = (IStorage*)This;
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}
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/*
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* Check that we obtained an interface.
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*/
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if ((*ppvObject)==0)
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return E_NOINTERFACE;
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/*
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* Query Interface always increases the reference count by one when it is
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* successful
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*/
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StorageBaseImpl_AddRef(iface);
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return S_OK;
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}
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/************************************************************************
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* Storage32BaseImpl_AddRef (IUnknown)
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*
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* This method implements the common AddRef for all IStorage32
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* implementations contained in this file.
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*
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* See Windows documentation for more details on IUnknown methods.
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*/
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ULONG WINAPI StorageBaseImpl_AddRef(
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IStorage* iface)
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{
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ICOM_THIS(StorageBaseImpl,iface);
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This->ref++;
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return This->ref;
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}
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/************************************************************************
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* Storage32BaseImpl_Release (IUnknown)
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*
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* This method implements the common Release for all IStorage32
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* implementations contained in this file.
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*
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* See Windows documentation for more details on IUnknown methods.
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*/
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ULONG WINAPI StorageBaseImpl_Release(
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IStorage* iface)
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{
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ICOM_THIS(StorageBaseImpl,iface);
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/*
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* Decrease the reference count on this object.
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*/
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This->ref--;
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/*
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* If the reference count goes down to 0, perform suicide.
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*/
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if (This->ref==0)
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{
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/*
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* Since we are using a system of base-classes, we want to call the
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* destructor of the appropriate derived class. To do this, we are
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* using virtual functions to implement the destructor.
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*/
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This->v_destructor(This);
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return 0;
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}
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return This->ref;
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}
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/************************************************************************
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* Storage32BaseImpl_OpenStream (IStorage)
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*
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* This method will open the specified stream object from the current storage.
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*
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* See Windows documentation for more details on IStorage methods.
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*/
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HRESULT WINAPI StorageBaseImpl_OpenStream(
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IStorage* iface,
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const OLECHAR* pwcsName, /* [string][in] */
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void* reserved1, /* [unique][in] */
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DWORD grfMode, /* [in] */
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DWORD reserved2, /* [in] */
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IStream** ppstm) /* [out] */
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{
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ICOM_THIS(StorageBaseImpl,iface);
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IEnumSTATSTGImpl* propertyEnumeration;
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StgStreamImpl* newStream;
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StgProperty currentProperty;
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ULONG foundPropertyIndex;
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/*
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* Perform a sanity check on the parameters.
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*/
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if ( (pwcsName==NULL) || (ppstm==0) )
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return E_INVALIDARG;
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/*
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* Initialize the out parameter
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*/
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*ppstm = 0;
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/*
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* Validate the STGM flags
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*/
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if ( FAILED( validateSTGM(grfMode) ))
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return STG_E_INVALIDFLAG;
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/*
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* As documented.
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*/
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if ( !(grfMode & STGM_SHARE_EXCLUSIVE) ||
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(grfMode & STGM_DELETEONRELEASE) ||
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(grfMode & STGM_TRANSACTED) )
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return STG_E_INVALIDFUNCTION;
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/*
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* Create a property enumeration to search the properties
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*/
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propertyEnumeration = IEnumSTATSTGImpl_Construct(
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This->ancestorStorage,
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This->rootPropertySetIndex);
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/*
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* Search the enumeration for the property with the given name
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*/
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foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(
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propertyEnumeration,
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pwcsName,
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¤tProperty);
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/*
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* Delete the property enumeration since we don't need it anymore
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*/
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IEnumSTATSTGImpl_Destroy(propertyEnumeration);
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/*
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* If it was found, construct the stream object and return a pointer to it.
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*/
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if ( (foundPropertyIndex!=PROPERTY_NULL) &&
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(currentProperty.propertyType==PROPTYPE_STREAM) )
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{
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newStream = StgStreamImpl_Construct(This, foundPropertyIndex);
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if (newStream!=0)
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{
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*ppstm = (IStream*)newStream;
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/*
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* Since we are returning a pointer to the interface, we have to
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* nail down the reference.
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*/
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StgStreamImpl_AddRef(*ppstm);
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return S_OK;
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}
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return E_OUTOFMEMORY;
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}
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return STG_E_FILENOTFOUND;
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}
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/************************************************************************
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* Storage32BaseImpl_OpenStorage (IStorage)
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*
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* This method will open a new storage object from the current storage.
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*
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* See Windows documentation for more details on IStorage methods.
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*/
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HRESULT WINAPI StorageBaseImpl_OpenStorage(
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IStorage* iface,
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const OLECHAR* pwcsName, /* [string][unique][in] */
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IStorage* pstgPriority, /* [unique][in] */
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DWORD grfMode, /* [in] */
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SNB snbExclude, /* [unique][in] */
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DWORD reserved, /* [in] */
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IStorage** ppstg) /* [out] */
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{
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ICOM_THIS(StorageBaseImpl,iface);
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StorageInternalImpl* newStorage;
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IEnumSTATSTGImpl* propertyEnumeration;
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StgProperty currentProperty;
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ULONG foundPropertyIndex;
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/*
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* Perform a sanity check on the parameters.
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*/
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if ( (This==0) || (pwcsName==NULL) || (ppstg==0) )
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return E_INVALIDARG;
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/*
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* Validate the STGM flags
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*/
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if ( FAILED( validateSTGM(grfMode) ))
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return STG_E_INVALIDFLAG;
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/*
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* As documented.
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*/
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if ( !(grfMode & STGM_SHARE_EXCLUSIVE) ||
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(grfMode & STGM_DELETEONRELEASE) ||
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(grfMode & STGM_PRIORITY) )
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return STG_E_INVALIDFUNCTION;
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/*
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* Initialize the out parameter
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*/
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*ppstg = 0;
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/*
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* Create a property enumeration to search the properties
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*/
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propertyEnumeration = IEnumSTATSTGImpl_Construct(
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This->ancestorStorage,
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This->rootPropertySetIndex);
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/*
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* Search the enumeration for the property with the given name
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*/
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foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(
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propertyEnumeration,
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pwcsName,
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¤tProperty);
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/*
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* Delete the property enumeration since we don't need it anymore
|
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*/
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IEnumSTATSTGImpl_Destroy(propertyEnumeration);
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/*
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* If it was found, construct the stream object and return a pointer to it.
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*/
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if ( (foundPropertyIndex!=PROPERTY_NULL) &&
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(currentProperty.propertyType==PROPTYPE_STORAGE) )
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{
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/*
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* Construct a new Storage object
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*/
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newStorage = StorageInternalImpl_Construct(
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This->ancestorStorage,
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foundPropertyIndex);
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if (newStorage != 0)
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{
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*ppstg = (IStorage*)newStorage;
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/*
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* Since we are returning a pointer to the interface,
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* we have to nail down the reference.
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*/
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StorageBaseImpl_AddRef(*ppstg);
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return S_OK;
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}
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return STG_E_INSUFFICIENTMEMORY;
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}
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return STG_E_FILENOTFOUND;
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}
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/************************************************************************
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* Storage32BaseImpl_EnumElements (IStorage)
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*
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* This method will create an enumerator object that can be used to
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* retrieve informatino about all the properties in the storage object.
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*
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* See Windows documentation for more details on IStorage methods.
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*/
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HRESULT WINAPI StorageBaseImpl_EnumElements(
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IStorage* iface,
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DWORD reserved1, /* [in] */
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void* reserved2, /* [size_is][unique][in] */
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DWORD reserved3, /* [in] */
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IEnumSTATSTG** ppenum) /* [out] */
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{
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ICOM_THIS(StorageBaseImpl,iface);
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IEnumSTATSTGImpl* newEnum;
|
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|
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/*
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* Perform a sanity check on the parameters.
|
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*/
|
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if ( (This==0) || (ppenum==0))
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return E_INVALIDARG;
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|
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/*
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* Construct the enumerator.
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*/
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newEnum = IEnumSTATSTGImpl_Construct(
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This->ancestorStorage,
|
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This->rootPropertySetIndex);
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|
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if (newEnum!=0)
|
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{
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*ppenum = (IEnumSTATSTG*)newEnum;
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|
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/*
|
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* Don't forget to nail down a reference to the new object before
|
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* returning it.
|
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*/
|
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IEnumSTATSTGImpl_AddRef(*ppenum);
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|
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return S_OK;
|
|
}
|
|
|
|
return E_OUTOFMEMORY;
|
|
}
|
|
|
|
/************************************************************************
|
|
* Storage32BaseImpl_Stat (IStorage)
|
|
*
|
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* This method will retrieve information about this storage object.
|
|
*
|
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* See Windows documentation for more details on IStorage methods.
|
|
*/
|
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HRESULT WINAPI StorageBaseImpl_Stat(
|
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IStorage* iface,
|
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STATSTG* pstatstg, /* [out] */
|
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DWORD grfStatFlag) /* [in] */
|
|
{
|
|
ICOM_THIS(StorageBaseImpl,iface);
|
|
StgProperty curProperty;
|
|
BOOL readSucessful;
|
|
|
|
/*
|
|
* Perform a sanity check on the parameters.
|
|
*/
|
|
if ( (This==0) || (pstatstg==0))
|
|
return E_INVALIDARG;
|
|
|
|
/*
|
|
* Read the information from the property.
|
|
*/
|
|
readSucessful = StorageImpl_ReadProperty(
|
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This->ancestorStorage,
|
|
This->rootPropertySetIndex,
|
|
&curProperty);
|
|
|
|
if (readSucessful)
|
|
{
|
|
StorageUtl_CopyPropertyToSTATSTG(
|
|
pstatstg,
|
|
&curProperty,
|
|
grfStatFlag);
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
return E_FAIL;
|
|
}
|
|
|
|
/************************************************************************
|
|
* Storage32BaseImpl_RenameElement (IStorage)
|
|
*
|
|
* This method will rename the specified element.
|
|
*
|
|
* See Windows documentation for more details on IStorage methods.
|
|
*
|
|
* Implementation notes: The method used to rename consists of creating a clone
|
|
* of the deleted StgProperty object setting it with the new name and to
|
|
* perform a DestroyElement of the old StgProperty.
|
|
*/
|
|
HRESULT WINAPI StorageBaseImpl_RenameElement(
|
|
IStorage* iface,
|
|
const OLECHAR* pwcsOldName, /* [in] */
|
|
const OLECHAR* pwcsNewName) /* [in] */
|
|
{
|
|
ICOM_THIS(StorageBaseImpl,iface);
|
|
IEnumSTATSTGImpl* propertyEnumeration;
|
|
StgProperty currentProperty;
|
|
ULONG foundPropertyIndex;
|
|
|
|
/*
|
|
* Create a property enumeration to search the properties
|
|
*/
|
|
propertyEnumeration = IEnumSTATSTGImpl_Construct(This->ancestorStorage,
|
|
This->rootPropertySetIndex);
|
|
|
|
/*
|
|
* Search the enumeration for the new property name
|
|
*/
|
|
foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(propertyEnumeration,
|
|
pwcsNewName,
|
|
¤tProperty);
|
|
|
|
if (foundPropertyIndex != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* There is already a property with the new name
|
|
*/
|
|
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
|
|
return STG_E_FILEALREADYEXISTS;
|
|
}
|
|
|
|
IEnumSTATSTGImpl_Reset((IEnumSTATSTG*)propertyEnumeration);
|
|
|
|
/*
|
|
* Search the enumeration for the old property name
|
|
*/
|
|
foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(propertyEnumeration,
|
|
pwcsOldName,
|
|
¤tProperty);
|
|
|
|
/*
|
|
* Delete the property enumeration since we don't need it anymore
|
|
*/
|
|
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
|
|
|
|
if (foundPropertyIndex != PROPERTY_NULL)
|
|
{
|
|
StgProperty renamedProperty;
|
|
ULONG renamedPropertyIndex;
|
|
|
|
/*
|
|
* Setup a new property for the renamed property
|
|
*/
|
|
renamedProperty.sizeOfNameString =
|
|
( lstrlenW(pwcsNewName)+1 ) * sizeof(WCHAR);
|
|
|
|
if (renamedProperty.sizeOfNameString > PROPERTY_NAME_BUFFER_LEN)
|
|
return STG_E_INVALIDNAME;
|
|
|
|
lstrcpyW(renamedProperty.name, pwcsNewName);
|
|
|
|
renamedProperty.propertyType = currentProperty.propertyType;
|
|
renamedProperty.startingBlock = currentProperty.startingBlock;
|
|
renamedProperty.size.LowPart = currentProperty.size.LowPart;
|
|
renamedProperty.size.HighPart = currentProperty.size.HighPart;
|
|
|
|
renamedProperty.previousProperty = PROPERTY_NULL;
|
|
renamedProperty.nextProperty = PROPERTY_NULL;
|
|
|
|
/*
|
|
* Bring the dirProperty link in case it is a storage and in which
|
|
* case the renamed storage elements don't require to be reorganized.
|
|
*/
|
|
renamedProperty.dirProperty = currentProperty.dirProperty;
|
|
|
|
/* call CoFileTime to get the current time
|
|
renamedProperty.timeStampS1
|
|
renamedProperty.timeStampD1
|
|
renamedProperty.timeStampS2
|
|
renamedProperty.timeStampD2
|
|
renamedProperty.propertyUniqueID
|
|
*/
|
|
|
|
/*
|
|
* Obtain a free property in the property chain
|
|
*/
|
|
renamedPropertyIndex = getFreeProperty(This->ancestorStorage);
|
|
|
|
/*
|
|
* Save the new property into the new property spot
|
|
*/
|
|
StorageImpl_WriteProperty(
|
|
This->ancestorStorage,
|
|
renamedPropertyIndex,
|
|
&renamedProperty);
|
|
|
|
/*
|
|
* Find a spot in the property chain for our newly created property.
|
|
*/
|
|
updatePropertyChain(
|
|
(StorageImpl*)This,
|
|
renamedPropertyIndex,
|
|
renamedProperty);
|
|
|
|
/*
|
|
* At this point the renamed property has been inserted in the tree,
|
|
* now, before to Destroy the old property we must zeroed it's dirProperty
|
|
* otherwise the DestroyProperty below will zap it all and we do not want
|
|
* this to happen.
|
|
* Also, we fake that the old property is a storage so the DestroyProperty
|
|
* will not do a SetSize(0) on the stream data.
|
|
*
|
|
* This means that we need to tweek the StgProperty if it is a stream or a
|
|
* non empty storage.
|
|
*/
|
|
currentProperty.dirProperty = PROPERTY_NULL;
|
|
currentProperty.propertyType = PROPTYPE_STORAGE;
|
|
StorageImpl_WriteProperty(
|
|
This->ancestorStorage,
|
|
foundPropertyIndex,
|
|
¤tProperty);
|
|
|
|
/*
|
|
* Invoke Destroy to get rid of the ole property and automatically redo
|
|
* the linking of it's previous and next members...
|
|
*/
|
|
StorageImpl_DestroyElement((IStorage*)This->ancestorStorage, pwcsOldName);
|
|
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* There is no property with the old name
|
|
*/
|
|
return STG_E_FILENOTFOUND;
|
|
}
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
/************************************************************************
|
|
* Storage32BaseImpl_CreateStream (IStorage)
|
|
*
|
|
* This method will create a stream object within this storage
|
|
*
|
|
* See Windows documentation for more details on IStorage methods.
|
|
*/
|
|
HRESULT WINAPI StorageBaseImpl_CreateStream(
|
|
IStorage* iface,
|
|
const OLECHAR* pwcsName, /* [string][in] */
|
|
DWORD grfMode, /* [in] */
|
|
DWORD reserved1, /* [in] */
|
|
DWORD reserved2, /* [in] */
|
|
IStream** ppstm) /* [out] */
|
|
{
|
|
ICOM_THIS(StorageBaseImpl,iface);
|
|
IEnumSTATSTGImpl* propertyEnumeration;
|
|
StgStreamImpl* newStream;
|
|
StgProperty currentProperty, newStreamProperty;
|
|
ULONG foundPropertyIndex, newPropertyIndex;
|
|
|
|
/*
|
|
* Validate parameters
|
|
*/
|
|
if (ppstm == 0)
|
|
return STG_E_INVALIDPOINTER;
|
|
|
|
if (pwcsName == 0)
|
|
return STG_E_INVALIDNAME;
|
|
|
|
/*
|
|
* Validate the STGM flags
|
|
*/
|
|
if ( FAILED( validateSTGM(grfMode) ))
|
|
return STG_E_INVALIDFLAG;
|
|
|
|
/*
|
|
* As documented.
|
|
*/
|
|
if ( !(grfMode & STGM_SHARE_EXCLUSIVE) ||
|
|
(grfMode & STGM_DELETEONRELEASE) ||
|
|
(grfMode & STGM_TRANSACTED) )
|
|
return STG_E_INVALIDFUNCTION;
|
|
|
|
/*
|
|
* Initialize the out parameter
|
|
*/
|
|
*ppstm = 0;
|
|
|
|
/*
|
|
* Create a property enumeration to search the properties
|
|
*/
|
|
propertyEnumeration = IEnumSTATSTGImpl_Construct(This->ancestorStorage,
|
|
This->rootPropertySetIndex);
|
|
|
|
foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(propertyEnumeration,
|
|
pwcsName,
|
|
¤tProperty);
|
|
|
|
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
|
|
|
|
if (foundPropertyIndex != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* An element with this name already exists
|
|
*/
|
|
if (grfMode & STGM_CREATE)
|
|
StorageImpl_DestroyElement((IStorage*)This->ancestorStorage, pwcsName);
|
|
else
|
|
return STG_E_FILEALREADYEXISTS;
|
|
}
|
|
|
|
/*
|
|
* memset the empty property
|
|
*/
|
|
memset(&newStreamProperty, 0, sizeof(StgProperty));
|
|
|
|
newStreamProperty.sizeOfNameString =
|
|
( lstrlenW(pwcsName)+1 ) * sizeof(WCHAR);
|
|
|
|
if (newStreamProperty.sizeOfNameString > PROPERTY_NAME_BUFFER_LEN)
|
|
return STG_E_INVALIDNAME;
|
|
|
|
lstrcpyW(newStreamProperty.name, pwcsName);
|
|
|
|
newStreamProperty.propertyType = PROPTYPE_STREAM;
|
|
newStreamProperty.startingBlock = BLOCK_END_OF_CHAIN;
|
|
newStreamProperty.size.LowPart = 0;
|
|
newStreamProperty.size.HighPart = 0;
|
|
|
|
newStreamProperty.previousProperty = PROPERTY_NULL;
|
|
newStreamProperty.nextProperty = PROPERTY_NULL;
|
|
newStreamProperty.dirProperty = PROPERTY_NULL;
|
|
|
|
/* call CoFileTime to get the current time
|
|
newStreamProperty.timeStampS1
|
|
newStreamProperty.timeStampD1
|
|
newStreamProperty.timeStampS2
|
|
newStreamProperty.timeStampD2
|
|
*/
|
|
|
|
/* newStreamProperty.propertyUniqueID */
|
|
|
|
/*
|
|
* Get a free property or create a new one
|
|
*/
|
|
newPropertyIndex = getFreeProperty(This->ancestorStorage);
|
|
|
|
/*
|
|
* Save the new property into the new property spot
|
|
*/
|
|
StorageImpl_WriteProperty(
|
|
This->ancestorStorage,
|
|
newPropertyIndex,
|
|
&newStreamProperty);
|
|
|
|
/*
|
|
* Find a spot in the property chain for our newly created property.
|
|
*/
|
|
updatePropertyChain(
|
|
(StorageImpl*)This,
|
|
newPropertyIndex,
|
|
newStreamProperty);
|
|
|
|
/*
|
|
* Open the stream to return it.
|
|
*/
|
|
newStream = StgStreamImpl_Construct(This, newPropertyIndex);
|
|
|
|
if (newStream != 0)
|
|
{
|
|
*ppstm = (IStream*)newStream;
|
|
|
|
/*
|
|
* Since we are returning a pointer to the interface, we have to nail down
|
|
* the reference.
|
|
*/
|
|
StgStreamImpl_AddRef(*ppstm);
|
|
}
|
|
else
|
|
{
|
|
return STG_E_INSUFFICIENTMEMORY;
|
|
}
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
/************************************************************************
|
|
* Storage32BaseImpl_SetClass (IStorage)
|
|
*
|
|
* This method will write the specified CLSID in the property of this
|
|
* storage.
|
|
*
|
|
* See Windows documentation for more details on IStorage methods.
|
|
*/
|
|
HRESULT WINAPI StorageBaseImpl_SetClass(
|
|
IStorage* iface,
|
|
REFCLSID clsid) /* [in] */
|
|
{
|
|
ICOM_THIS(StorageBaseImpl,iface);
|
|
HRESULT hRes = E_FAIL;
|
|
StgProperty curProperty;
|
|
BOOL success;
|
|
|
|
success = StorageImpl_ReadProperty(This->ancestorStorage,
|
|
This->rootPropertySetIndex,
|
|
&curProperty);
|
|
if (success)
|
|
{
|
|
curProperty.propertyUniqueID = *clsid;
|
|
|
|
success = StorageImpl_WriteProperty(This->ancestorStorage,
|
|
This->rootPropertySetIndex,
|
|
&curProperty);
|
|
if (success)
|
|
hRes = S_OK;
|
|
}
|
|
|
|
return hRes;
|
|
}
|
|
|
|
/************************************************************************
|
|
** Storage32Impl implementation
|
|
*/
|
|
|
|
/************************************************************************
|
|
* Storage32Impl_CreateStorage (IStorage)
|
|
*
|
|
* This method will create the storage object within the provided storage.
|
|
*
|
|
* See Windows documentation for more details on IStorage methods.
|
|
*/
|
|
HRESULT WINAPI StorageImpl_CreateStorage(
|
|
IStorage* iface,
|
|
const OLECHAR *pwcsName, /* [string][in] */
|
|
DWORD grfMode, /* [in] */
|
|
DWORD reserved1, /* [in] */
|
|
DWORD reserved2, /* [in] */
|
|
IStorage **ppstg) /* [out] */
|
|
{
|
|
StorageImpl* const This=(StorageImpl*)iface;
|
|
|
|
IEnumSTATSTGImpl *propertyEnumeration;
|
|
StgProperty currentProperty;
|
|
StgProperty newProperty;
|
|
ULONG foundPropertyIndex;
|
|
ULONG newPropertyIndex;
|
|
HRESULT hr;
|
|
|
|
/*
|
|
* Validate parameters
|
|
*/
|
|
if (ppstg == 0)
|
|
return STG_E_INVALIDPOINTER;
|
|
|
|
if (pwcsName == 0)
|
|
return STG_E_INVALIDNAME;
|
|
|
|
/*
|
|
* Validate the STGM flags
|
|
*/
|
|
if ( FAILED( validateSTGM(grfMode) ) ||
|
|
(grfMode & STGM_DELETEONRELEASE) )
|
|
return STG_E_INVALIDFLAG;
|
|
|
|
/*
|
|
* Initialize the out parameter
|
|
*/
|
|
*ppstg = 0;
|
|
|
|
/*
|
|
* Create a property enumeration and search the properties
|
|
*/
|
|
propertyEnumeration = IEnumSTATSTGImpl_Construct( This->ancestorStorage,
|
|
This->rootPropertySetIndex);
|
|
|
|
foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(propertyEnumeration,
|
|
pwcsName,
|
|
¤tProperty);
|
|
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
|
|
|
|
if (foundPropertyIndex != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* An element with this name already exists
|
|
*/
|
|
if (grfMode & STGM_CREATE)
|
|
StorageImpl_DestroyElement((IStorage*)This->ancestorStorage, pwcsName);
|
|
else
|
|
return STG_E_FILEALREADYEXISTS;
|
|
}
|
|
|
|
/*
|
|
* memset the empty property
|
|
*/
|
|
memset(&newProperty, 0, sizeof(StgProperty));
|
|
|
|
newProperty.sizeOfNameString = (lstrlenW(pwcsName)+1)*sizeof(WCHAR);
|
|
|
|
if (newProperty.sizeOfNameString > PROPERTY_NAME_BUFFER_LEN)
|
|
return STG_E_INVALIDNAME;
|
|
|
|
lstrcpyW(newProperty.name, pwcsName);
|
|
|
|
newProperty.propertyType = PROPTYPE_STORAGE;
|
|
newProperty.startingBlock = BLOCK_END_OF_CHAIN;
|
|
newProperty.size.LowPart = 0;
|
|
newProperty.size.HighPart = 0;
|
|
|
|
newProperty.previousProperty = PROPERTY_NULL;
|
|
newProperty.nextProperty = PROPERTY_NULL;
|
|
newProperty.dirProperty = PROPERTY_NULL;
|
|
|
|
/* call CoFileTime to get the current time
|
|
newProperty.timeStampS1
|
|
newProperty.timeStampD1
|
|
newProperty.timeStampS2
|
|
newProperty.timeStampD2
|
|
*/
|
|
|
|
/* newStorageProperty.propertyUniqueID */
|
|
|
|
/*
|
|
* Obtain a free property in the property chain
|
|
*/
|
|
newPropertyIndex = getFreeProperty(This->ancestorStorage);
|
|
|
|
/*
|
|
* Save the new property into the new property spot
|
|
*/
|
|
StorageImpl_WriteProperty(
|
|
This->ancestorStorage,
|
|
newPropertyIndex,
|
|
&newProperty);
|
|
|
|
/*
|
|
* Find a spot in the property chain for our newly created property.
|
|
*/
|
|
updatePropertyChain(
|
|
This,
|
|
newPropertyIndex,
|
|
newProperty);
|
|
|
|
/*
|
|
* Open it to get a pointer to return.
|
|
*/
|
|
hr = StorageBaseImpl_OpenStorage(
|
|
iface,
|
|
(OLECHAR*)pwcsName,
|
|
0,
|
|
grfMode,
|
|
0,
|
|
0,
|
|
ppstg);
|
|
|
|
if( (hr != S_OK) || (*ppstg == NULL))
|
|
{
|
|
return hr;
|
|
}
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
|
|
/***************************************************************************
|
|
*
|
|
* Internal Method
|
|
*
|
|
* Get a free property or create a new one.
|
|
*/
|
|
static ULONG getFreeProperty(
|
|
StorageImpl *storage)
|
|
{
|
|
ULONG currentPropertyIndex = 0;
|
|
ULONG newPropertyIndex = PROPERTY_NULL;
|
|
BOOL readSucessful = TRUE;
|
|
StgProperty currentProperty;
|
|
|
|
do
|
|
{
|
|
/*
|
|
* Start by reading the root property
|
|
*/
|
|
readSucessful = StorageImpl_ReadProperty(storage->ancestorStorage,
|
|
currentPropertyIndex,
|
|
¤tProperty);
|
|
if (readSucessful)
|
|
{
|
|
if (currentProperty.sizeOfNameString == 0)
|
|
{
|
|
/*
|
|
* The property existis and is available, we found it.
|
|
*/
|
|
newPropertyIndex = currentPropertyIndex;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* We exhausted the property list, we will create more space below
|
|
*/
|
|
newPropertyIndex = currentPropertyIndex;
|
|
}
|
|
currentPropertyIndex++;
|
|
|
|
} while (newPropertyIndex == PROPERTY_NULL);
|
|
|
|
/*
|
|
* grow the property chain
|
|
*/
|
|
if (! readSucessful)
|
|
{
|
|
StgProperty emptyProperty;
|
|
ULARGE_INTEGER newSize;
|
|
ULONG propertyIndex;
|
|
ULONG lastProperty = 0;
|
|
ULONG blockCount = 0;
|
|
|
|
/*
|
|
* obtain the new count of property blocks
|
|
*/
|
|
blockCount = BlockChainStream_GetCount(
|
|
storage->ancestorStorage->rootBlockChain)+1;
|
|
|
|
/*
|
|
* initialize the size used by the property stream
|
|
*/
|
|
newSize.HighPart = 0;
|
|
newSize.LowPart = storage->bigBlockSize * blockCount;
|
|
|
|
/*
|
|
* add a property block to the property chain
|
|
*/
|
|
BlockChainStream_SetSize(storage->ancestorStorage->rootBlockChain, newSize);
|
|
|
|
/*
|
|
* memset the empty property in order to initialize the unused newly
|
|
* created property
|
|
*/
|
|
memset(&emptyProperty, 0, sizeof(StgProperty));
|
|
|
|
/*
|
|
* initialize them
|
|
*/
|
|
lastProperty = storage->bigBlockSize / PROPSET_BLOCK_SIZE * blockCount;
|
|
|
|
for(
|
|
propertyIndex = newPropertyIndex;
|
|
propertyIndex < lastProperty;
|
|
propertyIndex++)
|
|
{
|
|
StorageImpl_WriteProperty(
|
|
storage->ancestorStorage,
|
|
propertyIndex,
|
|
&emptyProperty);
|
|
}
|
|
}
|
|
|
|
return newPropertyIndex;
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* Internal Method
|
|
*
|
|
* Case insensitive comparaison of StgProperty.name by first considering
|
|
* their size.
|
|
*
|
|
* Returns <0 when newPrpoerty < currentProperty
|
|
* >0 when newPrpoerty > currentProperty
|
|
* 0 when newPrpoerty == currentProperty
|
|
*/
|
|
static LONG propertyNameCmp(
|
|
OLECHAR *newProperty,
|
|
OLECHAR *currentProperty)
|
|
{
|
|
LONG sizeOfNew = (lstrlenW(newProperty) +1) * sizeof(WCHAR);
|
|
LONG sizeOfCur = (lstrlenW(currentProperty)+1) * sizeof(WCHAR);
|
|
LONG diff = sizeOfNew - sizeOfCur;
|
|
|
|
if (diff == 0)
|
|
{
|
|
/*
|
|
* We compare the string themselves only when they are of the same lenght
|
|
*/
|
|
WCHAR wsnew[PROPERTY_NAME_MAX_LEN];
|
|
WCHAR wscur[PROPERTY_NAME_MAX_LEN];
|
|
|
|
diff = lstrcmpW( (LPCWSTR)CRTDLL__wcsupr(
|
|
lstrcpynW(wsnew, newProperty, sizeOfNew)),
|
|
(LPCWSTR)CRTDLL__wcsupr(
|
|
lstrcpynW(wscur, currentProperty, sizeOfCur)));
|
|
}
|
|
|
|
return diff;
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* Internal Method
|
|
*
|
|
* Properly link this new element in the property chain.
|
|
*/
|
|
static void updatePropertyChain(
|
|
StorageImpl *storage,
|
|
ULONG newPropertyIndex,
|
|
StgProperty newProperty)
|
|
{
|
|
StgProperty currentProperty;
|
|
|
|
/*
|
|
* Read the root property
|
|
*/
|
|
StorageImpl_ReadProperty(storage->ancestorStorage,
|
|
storage->rootPropertySetIndex,
|
|
¤tProperty);
|
|
|
|
if (currentProperty.dirProperty != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* The root storage contains some element, therefore, start the research
|
|
* for the appropriate location.
|
|
*/
|
|
BOOL found = 0;
|
|
ULONG current, next, previous, currentPropertyId;
|
|
|
|
/*
|
|
* Keep the StgProperty sequence number of the storage first property
|
|
*/
|
|
currentPropertyId = currentProperty.dirProperty;
|
|
|
|
/*
|
|
* Read
|
|
*/
|
|
StorageImpl_ReadProperty(storage->ancestorStorage,
|
|
currentProperty.dirProperty,
|
|
¤tProperty);
|
|
|
|
previous = currentProperty.previousProperty;
|
|
next = currentProperty.nextProperty;
|
|
current = currentPropertyId;
|
|
|
|
while (found == 0)
|
|
{
|
|
LONG diff = propertyNameCmp( newProperty.name, currentProperty.name);
|
|
|
|
if (diff < 0)
|
|
{
|
|
if (previous != PROPERTY_NULL)
|
|
{
|
|
StorageImpl_ReadProperty(storage->ancestorStorage,
|
|
previous,
|
|
¤tProperty);
|
|
current = previous;
|
|
}
|
|
else
|
|
{
|
|
currentProperty.previousProperty = newPropertyIndex;
|
|
StorageImpl_WriteProperty(storage->ancestorStorage,
|
|
current,
|
|
¤tProperty);
|
|
found = 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (next != PROPERTY_NULL)
|
|
{
|
|
StorageImpl_ReadProperty(storage->ancestorStorage,
|
|
next,
|
|
¤tProperty);
|
|
current = next;
|
|
}
|
|
else
|
|
{
|
|
currentProperty.nextProperty = newPropertyIndex;
|
|
StorageImpl_WriteProperty(storage->ancestorStorage,
|
|
current,
|
|
¤tProperty);
|
|
found = 1;
|
|
}
|
|
}
|
|
|
|
previous = currentProperty.previousProperty;
|
|
next = currentProperty.nextProperty;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* The root storage is empty, link the new property to it's dir property
|
|
*/
|
|
currentProperty.dirProperty = newPropertyIndex;
|
|
StorageImpl_WriteProperty(storage->ancestorStorage,
|
|
storage->rootPropertySetIndex,
|
|
¤tProperty);
|
|
}
|
|
}
|
|
|
|
|
|
/*************************************************************************
|
|
* CopyTo (IStorage)
|
|
*/
|
|
HRESULT WINAPI StorageImpl_CopyTo(
|
|
IStorage* iface,
|
|
DWORD ciidExclude, /* [in] */
|
|
const IID *rgiidExclude,/* [size_is][unique][in] */
|
|
SNB snbExclude, /* [unique][in] */
|
|
IStorage *pstgDest) /* [unique][in] */
|
|
{
|
|
return E_NOTIMPL;
|
|
}
|
|
|
|
/*************************************************************************
|
|
* MoveElementTo (IStorage)
|
|
*/
|
|
HRESULT WINAPI StorageImpl_MoveElementTo(
|
|
IStorage* iface,
|
|
const OLECHAR *pwcsName, /* [string][in] */
|
|
IStorage *pstgDest, /* [unique][in] */
|
|
const OLECHAR *pwcsNewName,/* [string][in] */
|
|
DWORD grfFlags) /* [in] */
|
|
{
|
|
return E_NOTIMPL;
|
|
}
|
|
|
|
/*************************************************************************
|
|
* Commit (IStorage)
|
|
*/
|
|
HRESULT WINAPI StorageImpl_Commit(
|
|
IStorage* iface,
|
|
DWORD grfCommitFlags)/* [in] */
|
|
{
|
|
FIXME(ole, "(%ld): stub!\n", grfCommitFlags);
|
|
return S_OK;
|
|
}
|
|
|
|
/*************************************************************************
|
|
* Revert (IStorage)
|
|
*/
|
|
HRESULT WINAPI StorageImpl_Revert(
|
|
IStorage* iface)
|
|
{
|
|
return E_NOTIMPL;
|
|
}
|
|
|
|
/*************************************************************************
|
|
* DestroyElement (IStorage)
|
|
*
|
|
* Stategy: This implementation is build this way for simplicity not for speed.
|
|
* I always delete the top most element of the enumeration and adjust
|
|
* the deleted element pointer all the time. This takes longer to
|
|
* do but allow to reinvoke DestroyElement whenever we encounter a
|
|
* storage object. The optimisation reside in the usage of another
|
|
* enumeration stategy that would give all the leaves of a storage
|
|
* first. (postfix order)
|
|
*/
|
|
HRESULT WINAPI StorageImpl_DestroyElement(
|
|
IStorage* iface,
|
|
const OLECHAR *pwcsName)/* [string][in] */
|
|
{
|
|
StorageImpl* const This=(StorageImpl*)iface;
|
|
|
|
IEnumSTATSTGImpl* propertyEnumeration;
|
|
HRESULT hr = S_OK;
|
|
BOOL res;
|
|
StgProperty propertyToDelete;
|
|
StgProperty parentProperty;
|
|
ULONG foundPropertyIndexToDelete;
|
|
ULONG typeOfRelation;
|
|
ULONG parentPropertyId;
|
|
|
|
/*
|
|
* Perform a sanity check on the parameters.
|
|
*/
|
|
if (pwcsName==NULL)
|
|
return STG_E_INVALIDPOINTER;
|
|
|
|
/*
|
|
* Create a property enumeration to search the property with the given name
|
|
*/
|
|
propertyEnumeration = IEnumSTATSTGImpl_Construct(
|
|
This->ancestorStorage,
|
|
This->rootPropertySetIndex);
|
|
|
|
foundPropertyIndexToDelete = IEnumSTATSTGImpl_FindProperty(
|
|
propertyEnumeration,
|
|
pwcsName,
|
|
&propertyToDelete);
|
|
|
|
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
|
|
|
|
if ( foundPropertyIndexToDelete == PROPERTY_NULL )
|
|
{
|
|
return STG_E_FILENOTFOUND;
|
|
}
|
|
|
|
/*
|
|
* Find the parent property of the property to delete (the one that
|
|
* link to it). If This->dirProperty == foundPropertyIndexToDelete,
|
|
* the parent is This. Otherwise, the parent is one of it's sibling...
|
|
*/
|
|
|
|
/*
|
|
* First, read This's StgProperty..
|
|
*/
|
|
res = StorageImpl_ReadProperty(
|
|
This->ancestorStorage,
|
|
This->rootPropertySetIndex,
|
|
&parentProperty);
|
|
|
|
assert(res==TRUE);
|
|
|
|
/*
|
|
* Second, check to see if by any chance the actual storage (This) is not
|
|
* the parent of the property to delete... We never know...
|
|
*/
|
|
if ( parentProperty.dirProperty == foundPropertyIndexToDelete )
|
|
{
|
|
/*
|
|
* Set data as it would have been done in the else part...
|
|
*/
|
|
typeOfRelation = PROPERTY_RELATION_DIR;
|
|
parentPropertyId = This->rootPropertySetIndex;
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Create a property enumeration to search the parent properties, and
|
|
* delete it once done.
|
|
*/
|
|
IEnumSTATSTGImpl* propertyEnumeration2;
|
|
|
|
propertyEnumeration2 = IEnumSTATSTGImpl_Construct(
|
|
This->ancestorStorage,
|
|
This->rootPropertySetIndex);
|
|
|
|
typeOfRelation = IEnumSTATSTGImpl_FindParentProperty(
|
|
propertyEnumeration2,
|
|
foundPropertyIndexToDelete,
|
|
&parentProperty,
|
|
&parentPropertyId);
|
|
|
|
IEnumSTATSTGImpl_Destroy(propertyEnumeration2);
|
|
}
|
|
|
|
if ( propertyToDelete.propertyType == PROPTYPE_STORAGE )
|
|
{
|
|
hr = deleteStorageProperty(
|
|
This,
|
|
propertyToDelete.name);
|
|
}
|
|
else if ( propertyToDelete.propertyType == PROPTYPE_STREAM )
|
|
{
|
|
hr = deleteStreamProperty(
|
|
This,
|
|
foundPropertyIndexToDelete,
|
|
propertyToDelete);
|
|
}
|
|
|
|
if (hr!=S_OK)
|
|
return hr;
|
|
|
|
/*
|
|
* Adjust the property chain
|
|
*/
|
|
hr = adjustPropertyChain(
|
|
This,
|
|
propertyToDelete,
|
|
parentProperty,
|
|
parentPropertyId,
|
|
typeOfRelation);
|
|
|
|
return hr;
|
|
}
|
|
|
|
|
|
/*********************************************************************
|
|
*
|
|
* Internal Method
|
|
*
|
|
* Perform the deletion of a complete storage node
|
|
*
|
|
*/
|
|
static HRESULT deleteStorageProperty(
|
|
StorageImpl *parentStorage,
|
|
OLECHAR *propertyToDeleteName)
|
|
{
|
|
IEnumSTATSTG *elements = 0;
|
|
IStorage *childStorage = 0;
|
|
STATSTG currentElement;
|
|
HRESULT hr;
|
|
HRESULT destroyHr = S_OK;
|
|
|
|
/*
|
|
* Open the storage and enumerate it
|
|
*/
|
|
hr = StorageBaseImpl_OpenStorage(
|
|
(IStorage*)parentStorage,
|
|
propertyToDeleteName,
|
|
0,
|
|
STGM_SHARE_EXCLUSIVE,
|
|
0,
|
|
0,
|
|
&childStorage);
|
|
|
|
if (hr != S_OK)
|
|
{
|
|
return hr;
|
|
}
|
|
|
|
/*
|
|
* Enumerate the elements
|
|
*/
|
|
IStorage_EnumElements( childStorage, 0, 0, 0, &elements);
|
|
|
|
do
|
|
{
|
|
/*
|
|
* Obtain the next element
|
|
*/
|
|
hr = IEnumSTATSTG_Next(elements, 1, ¤tElement, NULL);
|
|
if (hr==S_OK)
|
|
{
|
|
destroyHr = StorageImpl_DestroyElement(
|
|
(IStorage*)childStorage,
|
|
(OLECHAR*)currentElement.pwcsName);
|
|
|
|
CoTaskMemFree(currentElement.pwcsName);
|
|
}
|
|
|
|
/*
|
|
* We need to Reset the enumeration every time because we delete elements
|
|
* and the enumeration could be invalid
|
|
*/
|
|
IEnumSTATSTG_Reset(elements);
|
|
|
|
} while ((hr == S_OK) && (destroyHr == S_OK));
|
|
|
|
IStorage_Release(childStorage);
|
|
IEnumSTATSTG_Release(elements);
|
|
|
|
return destroyHr;
|
|
}
|
|
|
|
/*********************************************************************
|
|
*
|
|
* Internal Method
|
|
*
|
|
* Perform the deletion of a stream node
|
|
*
|
|
*/
|
|
static HRESULT deleteStreamProperty(
|
|
StorageImpl *parentStorage,
|
|
ULONG indexOfPropertyToDelete,
|
|
StgProperty propertyToDelete)
|
|
{
|
|
IStream *pis;
|
|
HRESULT hr;
|
|
ULARGE_INTEGER size;
|
|
|
|
size.HighPart = 0;
|
|
size.LowPart = 0;
|
|
|
|
hr = StorageBaseImpl_OpenStream(
|
|
(IStorage*)parentStorage,
|
|
(OLECHAR*)propertyToDelete.name,
|
|
NULL,
|
|
STGM_SHARE_EXCLUSIVE,
|
|
0,
|
|
&pis);
|
|
|
|
if (hr!=S_OK)
|
|
{
|
|
return(hr);
|
|
}
|
|
|
|
/*
|
|
* Zap the stream
|
|
*/
|
|
hr = IStream_SetSize(pis, size);
|
|
|
|
if(hr != S_OK)
|
|
{
|
|
return hr;
|
|
}
|
|
|
|
/*
|
|
* Invalidate the property by zeroing it's name member.
|
|
*/
|
|
propertyToDelete.sizeOfNameString = 0;
|
|
|
|
/*
|
|
* Here we should re-read the property so we get the updated pointer
|
|
* but since we are here to zap it, I don't do it...
|
|
*/
|
|
|
|
StorageImpl_WriteProperty(
|
|
parentStorage->ancestorStorage,
|
|
indexOfPropertyToDelete,
|
|
&propertyToDelete);
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
/*********************************************************************
|
|
*
|
|
* Internal Method
|
|
*
|
|
* Finds a placeholder for the StgProperty within the Storage
|
|
*
|
|
*/
|
|
static HRESULT findPlaceholder(
|
|
StorageImpl *storage,
|
|
ULONG propertyIndexToStore,
|
|
ULONG storePropertyIndex,
|
|
INT typeOfRelation)
|
|
{
|
|
StgProperty storeProperty;
|
|
HRESULT hr = S_OK;
|
|
BOOL res = TRUE;
|
|
|
|
/*
|
|
* Read the storage property
|
|
*/
|
|
res = StorageImpl_ReadProperty(
|
|
storage->ancestorStorage,
|
|
storePropertyIndex,
|
|
&storeProperty);
|
|
|
|
if(! res)
|
|
{
|
|
return E_FAIL;
|
|
}
|
|
|
|
if (typeOfRelation == PROPERTY_RELATION_PREVIOUS)
|
|
{
|
|
if (storeProperty.previousProperty != PROPERTY_NULL)
|
|
{
|
|
return findPlaceholder(
|
|
storage,
|
|
propertyIndexToStore,
|
|
storeProperty.previousProperty,
|
|
typeOfRelation);
|
|
}
|
|
else
|
|
{
|
|
storeProperty.previousProperty = propertyIndexToStore;
|
|
}
|
|
}
|
|
else if (typeOfRelation == PROPERTY_RELATION_NEXT)
|
|
{
|
|
if (storeProperty.nextProperty != PROPERTY_NULL)
|
|
{
|
|
return findPlaceholder(
|
|
storage,
|
|
propertyIndexToStore,
|
|
storeProperty.nextProperty,
|
|
typeOfRelation);
|
|
}
|
|
else
|
|
{
|
|
storeProperty.nextProperty = propertyIndexToStore;
|
|
}
|
|
}
|
|
else if (typeOfRelation == PROPERTY_RELATION_DIR)
|
|
{
|
|
if (storeProperty.dirProperty != PROPERTY_NULL)
|
|
{
|
|
return findPlaceholder(
|
|
storage,
|
|
propertyIndexToStore,
|
|
storeProperty.dirProperty,
|
|
typeOfRelation);
|
|
}
|
|
else
|
|
{
|
|
storeProperty.dirProperty = propertyIndexToStore;
|
|
}
|
|
}
|
|
|
|
hr = StorageImpl_WriteProperty(
|
|
storage->ancestorStorage,
|
|
storePropertyIndex,
|
|
&storeProperty);
|
|
|
|
if(! hr)
|
|
{
|
|
return E_FAIL;
|
|
}
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
/*************************************************************************
|
|
*
|
|
* Internal Method
|
|
*
|
|
* This method takes the previous and the next property link of a property
|
|
* to be deleted and find them a place in the Storage.
|
|
*/
|
|
static HRESULT adjustPropertyChain(
|
|
StorageImpl *This,
|
|
StgProperty propertyToDelete,
|
|
StgProperty parentProperty,
|
|
ULONG parentPropertyId,
|
|
INT typeOfRelation)
|
|
{
|
|
ULONG newLinkProperty = PROPERTY_NULL;
|
|
BOOL needToFindAPlaceholder = FALSE;
|
|
ULONG storeNode = PROPERTY_NULL;
|
|
ULONG toStoreNode = PROPERTY_NULL;
|
|
INT relationType = 0;
|
|
HRESULT hr = S_OK;
|
|
BOOL res = TRUE;
|
|
|
|
if (typeOfRelation == PROPERTY_RELATION_PREVIOUS)
|
|
{
|
|
if (propertyToDelete.previousProperty != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* Set the parent previous to the property to delete previous
|
|
*/
|
|
newLinkProperty = propertyToDelete.previousProperty;
|
|
|
|
if (propertyToDelete.nextProperty != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* We also need to find a storage for the other link, setup variables
|
|
* to do this at the end...
|
|
*/
|
|
needToFindAPlaceholder = TRUE;
|
|
storeNode = propertyToDelete.previousProperty;
|
|
toStoreNode = propertyToDelete.nextProperty;
|
|
relationType = PROPERTY_RELATION_NEXT;
|
|
}
|
|
}
|
|
else if (propertyToDelete.nextProperty != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* Set the parent previous to the property to delete next
|
|
*/
|
|
newLinkProperty = propertyToDelete.nextProperty;
|
|
}
|
|
|
|
/*
|
|
* Link it for real...
|
|
*/
|
|
parentProperty.previousProperty = newLinkProperty;
|
|
|
|
}
|
|
else if (typeOfRelation == PROPERTY_RELATION_NEXT)
|
|
{
|
|
if (propertyToDelete.previousProperty != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* Set the parent next to the property to delete next previous
|
|
*/
|
|
newLinkProperty = propertyToDelete.previousProperty;
|
|
|
|
if (propertyToDelete.nextProperty != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* We also need to find a storage for the other link, setup variables
|
|
* to do this at the end...
|
|
*/
|
|
needToFindAPlaceholder = TRUE;
|
|
storeNode = propertyToDelete.previousProperty;
|
|
toStoreNode = propertyToDelete.nextProperty;
|
|
relationType = PROPERTY_RELATION_NEXT;
|
|
}
|
|
}
|
|
else if (propertyToDelete.nextProperty != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* Set the parent next to the property to delete next
|
|
*/
|
|
newLinkProperty = propertyToDelete.nextProperty;
|
|
}
|
|
|
|
/*
|
|
* Link it for real...
|
|
*/
|
|
parentProperty.nextProperty = newLinkProperty;
|
|
}
|
|
else /* (typeOfRelation == PROPERTY_RELATION_DIR) */
|
|
{
|
|
if (propertyToDelete.previousProperty != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* Set the parent dir to the property to delete previous
|
|
*/
|
|
newLinkProperty = propertyToDelete.previousProperty;
|
|
|
|
if (propertyToDelete.nextProperty != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* We also need to find a storage for the other link, setup variables
|
|
* to do this at the end...
|
|
*/
|
|
needToFindAPlaceholder = TRUE;
|
|
storeNode = propertyToDelete.previousProperty;
|
|
toStoreNode = propertyToDelete.nextProperty;
|
|
relationType = PROPERTY_RELATION_NEXT;
|
|
}
|
|
}
|
|
else if (propertyToDelete.nextProperty != PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* Set the parent dir to the property to delete next
|
|
*/
|
|
newLinkProperty = propertyToDelete.nextProperty;
|
|
}
|
|
|
|
/*
|
|
* Link it for real...
|
|
*/
|
|
parentProperty.dirProperty = newLinkProperty;
|
|
}
|
|
|
|
/*
|
|
* Write back the parent property
|
|
*/
|
|
res = StorageImpl_WriteProperty(
|
|
This->ancestorStorage,
|
|
parentPropertyId,
|
|
&parentProperty);
|
|
if(! res)
|
|
{
|
|
return E_FAIL;
|
|
}
|
|
|
|
/*
|
|
* If a placeholder is required for the other link, then, find one and
|
|
* get out of here...
|
|
*/
|
|
if (needToFindAPlaceholder)
|
|
{
|
|
hr = findPlaceholder(
|
|
This,
|
|
toStoreNode,
|
|
storeNode,
|
|
relationType);
|
|
}
|
|
|
|
return hr;
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* SetElementTimes (IStorage)
|
|
*/
|
|
HRESULT WINAPI StorageImpl_SetElementTimes(
|
|
IStorage* iface,
|
|
const OLECHAR *pwcsName,/* [string][in] */
|
|
const FILETIME *pctime, /* [in] */
|
|
const FILETIME *patime, /* [in] */
|
|
const FILETIME *pmtime) /* [in] */
|
|
{
|
|
return E_NOTIMPL;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SetStateBits (IStorage)
|
|
*/
|
|
HRESULT WINAPI StorageImpl_SetStateBits(
|
|
IStorage* iface,
|
|
DWORD grfStateBits,/* [in] */
|
|
DWORD grfMask) /* [in] */
|
|
{
|
|
return E_NOTIMPL;
|
|
}
|
|
|
|
HRESULT StorageImpl_Construct(
|
|
StorageImpl* This,
|
|
HANDLE hFile,
|
|
DWORD openFlags)
|
|
{
|
|
HRESULT hr = S_OK;
|
|
StgProperty currentProperty;
|
|
BOOL readSucessful;
|
|
ULONG currentPropertyIndex;
|
|
|
|
if ( FAILED( validateSTGM(openFlags) ))
|
|
return STG_E_INVALIDFLAG;
|
|
|
|
memset(This, 0, sizeof(StorageImpl));
|
|
|
|
/*
|
|
* Initialize the virtual fgunction table.
|
|
*/
|
|
This->lpvtbl = &Storage32Impl_Vtbl;
|
|
This->v_destructor = &StorageImpl_Destroy;
|
|
|
|
/*
|
|
* This is the top-level storage so initialize the ancester pointer
|
|
* to this.
|
|
*/
|
|
This->ancestorStorage = This;
|
|
|
|
/*
|
|
* Initialize the physical support of the storage.
|
|
*/
|
|
This->hFile = hFile;
|
|
|
|
/*
|
|
* Initialize the big block cache.
|
|
*/
|
|
This->bigBlockSize = DEF_BIG_BLOCK_SIZE;
|
|
This->smallBlockSize = DEF_SMALL_BLOCK_SIZE;
|
|
This->bigBlockFile = BIGBLOCKFILE_Construct(hFile,
|
|
openFlags,
|
|
This->bigBlockSize);
|
|
|
|
if (This->bigBlockFile == 0)
|
|
return E_FAIL;
|
|
|
|
if (openFlags & STGM_CREATE)
|
|
{
|
|
ULARGE_INTEGER size;
|
|
BYTE* bigBlockBuffer;
|
|
|
|
/*
|
|
* Initialize all header variables:
|
|
* - The big block depot consists of one block and it is at block 0
|
|
* - The properties start at block 1
|
|
* - There is no small block depot
|
|
*/
|
|
memset( This->bigBlockDepotStart,
|
|
BLOCK_UNUSED,
|
|
sizeof(This->bigBlockDepotStart));
|
|
|
|
This->bigBlockDepotCount = 1;
|
|
This->bigBlockDepotStart[0] = 0;
|
|
This->rootStartBlock = 1;
|
|
This->smallBlockDepotStart = BLOCK_END_OF_CHAIN;
|
|
This->bigBlockSizeBits = DEF_BIG_BLOCK_SIZE_BITS;
|
|
This->smallBlockSizeBits = DEF_SMALL_BLOCK_SIZE_BITS;
|
|
This->extBigBlockDepotStart = BLOCK_END_OF_CHAIN;
|
|
This->extBigBlockDepotCount = 0;
|
|
|
|
StorageImpl_SaveFileHeader(This);
|
|
|
|
/*
|
|
* Add one block for the big block depot and one block for the properties
|
|
*/
|
|
size.HighPart = 0;
|
|
size.LowPart = This->bigBlockSize * 3;
|
|
BIGBLOCKFILE_SetSize(This->bigBlockFile, size);
|
|
|
|
/*
|
|
* Initialize the big block depot
|
|
*/
|
|
bigBlockBuffer = StorageImpl_GetBigBlock(This, 0);
|
|
memset(bigBlockBuffer, BLOCK_UNUSED, This->bigBlockSize);
|
|
StorageUtl_WriteDWord(bigBlockBuffer, 0, BLOCK_SPECIAL);
|
|
StorageUtl_WriteDWord(bigBlockBuffer, sizeof(ULONG), BLOCK_END_OF_CHAIN);
|
|
StorageImpl_ReleaseBigBlock(This, bigBlockBuffer);
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Load the header for the file.
|
|
*/
|
|
StorageImpl_LoadFileHeader(This);
|
|
}
|
|
|
|
/*
|
|
* There is no block depot cached yet.
|
|
*/
|
|
This->indexBlockDepotCached = 0xFFFFFFFF;
|
|
|
|
/*
|
|
* Start searching for free blocks with block 0.
|
|
*/
|
|
This->prevFreeBlock = 0;
|
|
|
|
/*
|
|
* Create the block chain abstractions.
|
|
*/
|
|
This->rootBlockChain =
|
|
BlockChainStream_Construct(This, &This->rootStartBlock, PROPERTY_NULL);
|
|
|
|
This->smallBlockDepotChain = BlockChainStream_Construct(
|
|
This,
|
|
&This->smallBlockDepotStart,
|
|
PROPERTY_NULL);
|
|
|
|
/*
|
|
* Write the root property
|
|
*/
|
|
if (openFlags & STGM_CREATE)
|
|
{
|
|
StgProperty rootProp;
|
|
/*
|
|
* Initialize the property chain
|
|
*/
|
|
memset(&rootProp, 0, sizeof(rootProp));
|
|
lstrcpyAtoW(rootProp.name, rootPropertyName);
|
|
|
|
rootProp.sizeOfNameString = (lstrlenW(rootProp.name)+1) * sizeof(WCHAR);
|
|
rootProp.propertyType = PROPTYPE_ROOT;
|
|
rootProp.previousProperty = PROPERTY_NULL;
|
|
rootProp.nextProperty = PROPERTY_NULL;
|
|
rootProp.dirProperty = PROPERTY_NULL;
|
|
rootProp.startingBlock = BLOCK_END_OF_CHAIN;
|
|
rootProp.size.HighPart = 0;
|
|
rootProp.size.LowPart = 0;
|
|
|
|
StorageImpl_WriteProperty(This, 0, &rootProp);
|
|
}
|
|
|
|
/*
|
|
* Find the ID of the root int he property sets.
|
|
*/
|
|
currentPropertyIndex = 0;
|
|
|
|
do
|
|
{
|
|
readSucessful = StorageImpl_ReadProperty(
|
|
This,
|
|
currentPropertyIndex,
|
|
¤tProperty);
|
|
|
|
if (readSucessful)
|
|
{
|
|
if ( (currentProperty.sizeOfNameString != 0 ) &&
|
|
(currentProperty.propertyType == PROPTYPE_ROOT) )
|
|
{
|
|
This->rootPropertySetIndex = currentPropertyIndex;
|
|
}
|
|
}
|
|
|
|
currentPropertyIndex++;
|
|
|
|
} while (readSucessful && (This->rootPropertySetIndex == PROPERTY_NULL) );
|
|
|
|
if (!readSucessful)
|
|
{
|
|
/* TODO CLEANUP */
|
|
return E_FAIL;
|
|
}
|
|
|
|
/*
|
|
* Create the block chain abstraction for the small block root chain.
|
|
*/
|
|
This->smallBlockRootChain = BlockChainStream_Construct(
|
|
This,
|
|
NULL,
|
|
This->rootPropertySetIndex);
|
|
|
|
return hr;
|
|
}
|
|
|
|
void StorageImpl_Destroy(
|
|
StorageImpl* This)
|
|
{
|
|
BlockChainStream_Destroy(This->smallBlockRootChain);
|
|
BlockChainStream_Destroy(This->rootBlockChain);
|
|
BlockChainStream_Destroy(This->smallBlockDepotChain);
|
|
|
|
BIGBLOCKFILE_Destructor(This->bigBlockFile);
|
|
return;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Storage32Impl_GetNextFreeBigBlock
|
|
*
|
|
* Returns the index of the next free big block.
|
|
* If the big block depot is filled, this method will enlarge it.
|
|
*
|
|
*/
|
|
ULONG StorageImpl_GetNextFreeBigBlock(
|
|
StorageImpl* This)
|
|
{
|
|
ULONG depotBlockIndexPos;
|
|
void *depotBuffer;
|
|
ULONG depotBlockOffset;
|
|
ULONG blocksPerDepot = This->bigBlockSize / sizeof(ULONG);
|
|
ULONG nextBlockIndex = BLOCK_SPECIAL;
|
|
int depotIndex = 0;
|
|
ULONG freeBlock = BLOCK_UNUSED;
|
|
|
|
depotIndex = This->prevFreeBlock / blocksPerDepot;
|
|
depotBlockOffset = (This->prevFreeBlock % blocksPerDepot) * sizeof(ULONG);
|
|
|
|
/*
|
|
* Scan the entire big block depot until we find a block marked free
|
|
*/
|
|
while (nextBlockIndex != BLOCK_UNUSED)
|
|
{
|
|
if (depotIndex < COUNT_BBDEPOTINHEADER)
|
|
{
|
|
depotBlockIndexPos = This->bigBlockDepotStart[depotIndex];
|
|
|
|
/*
|
|
* Grow the primary depot.
|
|
*/
|
|
if (depotBlockIndexPos == BLOCK_UNUSED)
|
|
{
|
|
depotBlockIndexPos = depotIndex*blocksPerDepot;
|
|
|
|
/*
|
|
* Add a block depot.
|
|
*/
|
|
Storage32Impl_AddBlockDepot(This, depotBlockIndexPos);
|
|
This->bigBlockDepotCount++;
|
|
This->bigBlockDepotStart[depotIndex] = depotBlockIndexPos;
|
|
|
|
/*
|
|
* Flag it as a block depot.
|
|
*/
|
|
StorageImpl_SetNextBlockInChain(This,
|
|
depotBlockIndexPos,
|
|
BLOCK_SPECIAL);
|
|
|
|
/* Save new header information.
|
|
*/
|
|
StorageImpl_SaveFileHeader(This);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
depotBlockIndexPos = Storage32Impl_GetExtDepotBlock(This, depotIndex);
|
|
|
|
if (depotBlockIndexPos == BLOCK_UNUSED)
|
|
{
|
|
/*
|
|
* Grow the extended depot.
|
|
*/
|
|
ULONG extIndex = BLOCK_UNUSED;
|
|
ULONG numExtBlocks = depotIndex - COUNT_BBDEPOTINHEADER;
|
|
ULONG extBlockOffset = numExtBlocks % (blocksPerDepot - 1);
|
|
|
|
if (extBlockOffset == 0)
|
|
{
|
|
/* We need an extended block.
|
|
*/
|
|
extIndex = Storage32Impl_AddExtBlockDepot(This);
|
|
This->extBigBlockDepotCount++;
|
|
depotBlockIndexPos = extIndex + 1;
|
|
}
|
|
else
|
|
depotBlockIndexPos = depotIndex * blocksPerDepot;
|
|
|
|
/*
|
|
* Add a block depot and mark it in the extended block.
|
|
*/
|
|
Storage32Impl_AddBlockDepot(This, depotBlockIndexPos);
|
|
This->bigBlockDepotCount++;
|
|
Storage32Impl_SetExtDepotBlock(This, depotIndex, depotBlockIndexPos);
|
|
|
|
/* Flag the block depot.
|
|
*/
|
|
StorageImpl_SetNextBlockInChain(This,
|
|
depotBlockIndexPos,
|
|
BLOCK_SPECIAL);
|
|
|
|
/* If necessary, flag the extended depot block.
|
|
*/
|
|
if (extIndex != BLOCK_UNUSED)
|
|
StorageImpl_SetNextBlockInChain(This, extIndex, BLOCK_EXTBBDEPOT);
|
|
|
|
/* Save header information.
|
|
*/
|
|
StorageImpl_SaveFileHeader(This);
|
|
}
|
|
}
|
|
|
|
depotBuffer = StorageImpl_GetROBigBlock(This, depotBlockIndexPos);
|
|
|
|
if (depotBuffer != 0)
|
|
{
|
|
while ( ( (depotBlockOffset/sizeof(ULONG) ) < blocksPerDepot) &&
|
|
( nextBlockIndex != BLOCK_UNUSED))
|
|
{
|
|
StorageUtl_ReadDWord(depotBuffer, depotBlockOffset, &nextBlockIndex);
|
|
|
|
if (nextBlockIndex == BLOCK_UNUSED)
|
|
{
|
|
freeBlock = (depotIndex * blocksPerDepot) +
|
|
(depotBlockOffset/sizeof(ULONG));
|
|
}
|
|
|
|
depotBlockOffset += sizeof(ULONG);
|
|
}
|
|
|
|
StorageImpl_ReleaseBigBlock(This, depotBuffer);
|
|
}
|
|
|
|
depotIndex++;
|
|
depotBlockOffset = 0;
|
|
}
|
|
|
|
This->prevFreeBlock = freeBlock;
|
|
|
|
return freeBlock;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Storage32Impl_AddBlockDepot
|
|
*
|
|
* This will create a depot block, essentially it is a block initialized
|
|
* to BLOCK_UNUSEDs.
|
|
*/
|
|
void Storage32Impl_AddBlockDepot(StorageImpl* This, ULONG blockIndex)
|
|
{
|
|
BYTE* blockBuffer;
|
|
|
|
blockBuffer = StorageImpl_GetBigBlock(This, blockIndex);
|
|
|
|
/*
|
|
* Initialize blocks as free
|
|
*/
|
|
memset(blockBuffer, BLOCK_UNUSED, This->bigBlockSize);
|
|
|
|
StorageImpl_ReleaseBigBlock(This, blockBuffer);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Storage32Impl_GetExtDepotBlock
|
|
*
|
|
* Returns the index of the block that corresponds to the specified depot
|
|
* index. This method is only for depot indexes equal or greater than
|
|
* COUNT_BBDEPOTINHEADER.
|
|
*/
|
|
ULONG Storage32Impl_GetExtDepotBlock(StorageImpl* This, ULONG depotIndex)
|
|
{
|
|
ULONG depotBlocksPerExtBlock = (This->bigBlockSize / sizeof(ULONG)) - 1;
|
|
ULONG numExtBlocks = depotIndex - COUNT_BBDEPOTINHEADER;
|
|
ULONG extBlockCount = numExtBlocks / depotBlocksPerExtBlock;
|
|
ULONG extBlockOffset = numExtBlocks % depotBlocksPerExtBlock;
|
|
ULONG blockIndex = BLOCK_UNUSED;
|
|
ULONG extBlockIndex = This->extBigBlockDepotStart;
|
|
|
|
assert(depotIndex >= COUNT_BBDEPOTINHEADER);
|
|
|
|
if (This->extBigBlockDepotStart == BLOCK_END_OF_CHAIN)
|
|
return BLOCK_UNUSED;
|
|
|
|
while (extBlockCount > 0)
|
|
{
|
|
extBlockIndex = Storage32Impl_GetNextExtendedBlock(This, extBlockIndex);
|
|
extBlockCount--;
|
|
}
|
|
|
|
if (extBlockIndex != BLOCK_UNUSED)
|
|
{
|
|
BYTE* depotBuffer;
|
|
|
|
depotBuffer = StorageImpl_GetROBigBlock(This, extBlockIndex);
|
|
|
|
if (depotBuffer != 0)
|
|
{
|
|
StorageUtl_ReadDWord(depotBuffer,
|
|
extBlockOffset * sizeof(ULONG),
|
|
&blockIndex);
|
|
|
|
StorageImpl_ReleaseBigBlock(This, depotBuffer);
|
|
}
|
|
}
|
|
|
|
return blockIndex;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Storage32Impl_SetExtDepotBlock
|
|
*
|
|
* Associates the specified block index to the specified depot index.
|
|
* This method is only for depot indexes equal or greater than
|
|
* COUNT_BBDEPOTINHEADER.
|
|
*/
|
|
void Storage32Impl_SetExtDepotBlock(StorageImpl* This,
|
|
ULONG depotIndex,
|
|
ULONG blockIndex)
|
|
{
|
|
ULONG depotBlocksPerExtBlock = (This->bigBlockSize / sizeof(ULONG)) - 1;
|
|
ULONG numExtBlocks = depotIndex - COUNT_BBDEPOTINHEADER;
|
|
ULONG extBlockCount = numExtBlocks / depotBlocksPerExtBlock;
|
|
ULONG extBlockOffset = numExtBlocks % depotBlocksPerExtBlock;
|
|
ULONG extBlockIndex = This->extBigBlockDepotStart;
|
|
|
|
assert(depotIndex >= COUNT_BBDEPOTINHEADER);
|
|
|
|
while (extBlockCount > 0)
|
|
{
|
|
extBlockIndex = Storage32Impl_GetNextExtendedBlock(This, extBlockIndex);
|
|
extBlockCount--;
|
|
}
|
|
|
|
if (extBlockIndex != BLOCK_UNUSED)
|
|
{
|
|
BYTE* depotBuffer;
|
|
|
|
depotBuffer = StorageImpl_GetBigBlock(This, extBlockIndex);
|
|
|
|
if (depotBuffer != 0)
|
|
{
|
|
StorageUtl_WriteDWord(depotBuffer,
|
|
extBlockOffset * sizeof(ULONG),
|
|
blockIndex);
|
|
|
|
StorageImpl_ReleaseBigBlock(This, depotBuffer);
|
|
}
|
|
}
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Storage32Impl_AddExtBlockDepot
|
|
*
|
|
* Creates an extended depot block.
|
|
*/
|
|
ULONG Storage32Impl_AddExtBlockDepot(StorageImpl* This)
|
|
{
|
|
ULONG numExtBlocks = This->extBigBlockDepotCount;
|
|
ULONG nextExtBlock = This->extBigBlockDepotStart;
|
|
BYTE* depotBuffer = NULL;
|
|
ULONG index = BLOCK_UNUSED;
|
|
ULONG nextBlockOffset = This->bigBlockSize - sizeof(ULONG);
|
|
ULONG blocksPerDepotBlock = This->bigBlockSize / sizeof(ULONG);
|
|
ULONG depotBlocksPerExtBlock = blocksPerDepotBlock - 1;
|
|
|
|
index = (COUNT_BBDEPOTINHEADER + (numExtBlocks * depotBlocksPerExtBlock)) *
|
|
blocksPerDepotBlock;
|
|
|
|
if ((numExtBlocks == 0) && (nextExtBlock == BLOCK_END_OF_CHAIN))
|
|
{
|
|
/*
|
|
* The first extended block.
|
|
*/
|
|
This->extBigBlockDepotStart = index;
|
|
}
|
|
else
|
|
{
|
|
int i;
|
|
/*
|
|
* Follow the chain to the last one.
|
|
*/
|
|
for (i = 0; i < (numExtBlocks - 1); i++)
|
|
{
|
|
nextExtBlock = Storage32Impl_GetNextExtendedBlock(This, nextExtBlock);
|
|
}
|
|
|
|
/*
|
|
* Add the new extended block to the chain.
|
|
*/
|
|
depotBuffer = StorageImpl_GetBigBlock(This, nextExtBlock);
|
|
StorageUtl_WriteDWord(depotBuffer, nextBlockOffset, index);
|
|
StorageImpl_ReleaseBigBlock(This, depotBuffer);
|
|
}
|
|
|
|
/*
|
|
* Initialize this block.
|
|
*/
|
|
depotBuffer = StorageImpl_GetBigBlock(This, index);
|
|
memset(depotBuffer, BLOCK_UNUSED, This->bigBlockSize);
|
|
StorageImpl_ReleaseBigBlock(This, depotBuffer);
|
|
|
|
return index;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Storage32Impl_FreeBigBlock
|
|
*
|
|
* This method will flag the specified block as free in the big block depot.
|
|
*/
|
|
void StorageImpl_FreeBigBlock(
|
|
StorageImpl* This,
|
|
ULONG blockIndex)
|
|
{
|
|
StorageImpl_SetNextBlockInChain(This, blockIndex, BLOCK_UNUSED);
|
|
|
|
if (blockIndex < This->prevFreeBlock)
|
|
This->prevFreeBlock = blockIndex;
|
|
}
|
|
|
|
/************************************************************************
|
|
* Storage32Impl_GetNextBlockInChain
|
|
*
|
|
* This method will retrieve the block index of the next big block in
|
|
* in the chain.
|
|
*
|
|
* Params: This - Pointer to the Storage object.
|
|
* blockIndex - Index of the block to retrieve the chain
|
|
* for.
|
|
*
|
|
* Returns: This method returns the index of the next block in the chain.
|
|
* It will return the constants:
|
|
* BLOCK_SPECIAL - If the block given was not part of a
|
|
* chain.
|
|
* BLOCK_END_OF_CHAIN - If the block given was the last in
|
|
* a chain.
|
|
* BLOCK_UNUSED - If the block given was not past of a chain
|
|
* and is available.
|
|
* BLOCK_EXTBBDEPOT - This block is part of the extended
|
|
* big block depot.
|
|
*
|
|
* See Windows documentation for more details on IStorage methods.
|
|
*/
|
|
ULONG StorageImpl_GetNextBlockInChain(
|
|
StorageImpl* This,
|
|
ULONG blockIndex)
|
|
{
|
|
ULONG offsetInDepot = blockIndex * sizeof (ULONG);
|
|
ULONG depotBlockCount = offsetInDepot / This->bigBlockSize;
|
|
ULONG depotBlockOffset = offsetInDepot % This->bigBlockSize;
|
|
ULONG nextBlockIndex = BLOCK_SPECIAL;
|
|
void* depotBuffer;
|
|
ULONG depotBlockIndexPos;
|
|
|
|
assert(depotBlockCount < This->bigBlockDepotCount);
|
|
|
|
/*
|
|
* Cache the currently accessed depot block.
|
|
*/
|
|
if (depotBlockCount != This->indexBlockDepotCached)
|
|
{
|
|
This->indexBlockDepotCached = depotBlockCount;
|
|
|
|
if (depotBlockCount < COUNT_BBDEPOTINHEADER)
|
|
{
|
|
depotBlockIndexPos = This->bigBlockDepotStart[depotBlockCount];
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* We have to look in the extended depot.
|
|
*/
|
|
depotBlockIndexPos = Storage32Impl_GetExtDepotBlock(This, depotBlockCount);
|
|
}
|
|
|
|
depotBuffer = StorageImpl_GetROBigBlock(This, depotBlockIndexPos);
|
|
|
|
if (depotBuffer!=0)
|
|
{
|
|
int index;
|
|
|
|
for (index = 0; index < NUM_BLOCKS_PER_DEPOT_BLOCK; index++)
|
|
{
|
|
StorageUtl_ReadDWord(depotBuffer, index*sizeof(ULONG), &nextBlockIndex);
|
|
This->blockDepotCached[index] = nextBlockIndex;
|
|
}
|
|
|
|
StorageImpl_ReleaseBigBlock(This, depotBuffer);
|
|
}
|
|
}
|
|
|
|
nextBlockIndex = This->blockDepotCached[depotBlockOffset/sizeof(ULONG)];
|
|
|
|
return nextBlockIndex;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Storage32Impl_GetNextExtendedBlock
|
|
*
|
|
* Given an extended block this method will return the next extended block.
|
|
*
|
|
* NOTES:
|
|
* The last ULONG of an extended block is the block index of the next
|
|
* extended block. Extended blocks are marked as BLOCK_EXTBBDEPOT in the
|
|
* depot.
|
|
*
|
|
* Return values:
|
|
* - The index of the next extended block
|
|
* - BLOCK_UNUSED: there is no next extended block.
|
|
* - Any other return values denotes failure.
|
|
*/
|
|
ULONG Storage32Impl_GetNextExtendedBlock(StorageImpl* This, ULONG blockIndex)
|
|
{
|
|
ULONG nextBlockIndex = BLOCK_SPECIAL;
|
|
ULONG depotBlockOffset = This->bigBlockSize - sizeof(ULONG);
|
|
void* depotBuffer;
|
|
|
|
depotBuffer = StorageImpl_GetROBigBlock(This, blockIndex);
|
|
|
|
if (depotBuffer!=0)
|
|
{
|
|
StorageUtl_ReadDWord(depotBuffer, depotBlockOffset, &nextBlockIndex);
|
|
|
|
StorageImpl_ReleaseBigBlock(This, depotBuffer);
|
|
}
|
|
|
|
return nextBlockIndex;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Storage32Impl_SetNextBlockInChain
|
|
*
|
|
* This method will write the index of the specified block's next block
|
|
* in the big block depot.
|
|
*
|
|
* For example: to create the chain 3 -> 1 -> 7 -> End of Chain
|
|
* do the following
|
|
*
|
|
* Storage32Impl_SetNextBlockInChain(This, 3, 1);
|
|
* Storage32Impl_SetNextBlockInChain(This, 1, 7);
|
|
* Storage32Impl_SetNextBlockInChain(This, 7, BLOCK_END_OF_CHAIN);
|
|
*
|
|
*/
|
|
void StorageImpl_SetNextBlockInChain(
|
|
StorageImpl* This,
|
|
ULONG blockIndex,
|
|
ULONG nextBlock)
|
|
{
|
|
ULONG offsetInDepot = blockIndex * sizeof (ULONG);
|
|
ULONG depotBlockCount = offsetInDepot / This->bigBlockSize;
|
|
ULONG depotBlockOffset = offsetInDepot % This->bigBlockSize;
|
|
ULONG depotBlockIndexPos;
|
|
void* depotBuffer;
|
|
|
|
assert(depotBlockCount < This->bigBlockDepotCount);
|
|
assert(blockIndex != nextBlock);
|
|
|
|
if (depotBlockCount < COUNT_BBDEPOTINHEADER)
|
|
{
|
|
depotBlockIndexPos = This->bigBlockDepotStart[depotBlockCount];
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* We have to look in the extended depot.
|
|
*/
|
|
depotBlockIndexPos = Storage32Impl_GetExtDepotBlock(This, depotBlockCount);
|
|
}
|
|
|
|
depotBuffer = StorageImpl_GetBigBlock(This, depotBlockIndexPos);
|
|
|
|
if (depotBuffer!=0)
|
|
{
|
|
StorageUtl_WriteDWord(depotBuffer, depotBlockOffset, nextBlock);
|
|
StorageImpl_ReleaseBigBlock(This, depotBuffer);
|
|
}
|
|
|
|
/*
|
|
* Update the cached block depot, if necessary.
|
|
*/
|
|
if (depotBlockCount == This->indexBlockDepotCached)
|
|
{
|
|
This->blockDepotCached[depotBlockOffset/sizeof(ULONG)] = nextBlock;
|
|
}
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Storage32Impl_LoadFileHeader
|
|
*
|
|
* This method will read in the file header, i.e. big block index -1.
|
|
*/
|
|
HRESULT StorageImpl_LoadFileHeader(
|
|
StorageImpl* This)
|
|
{
|
|
HRESULT hr = STG_E_FILENOTFOUND;
|
|
void* headerBigBlock = NULL;
|
|
int index;
|
|
|
|
/*
|
|
* Get a pointer to the big block of data containing the header.
|
|
*/
|
|
headerBigBlock = StorageImpl_GetROBigBlock(This, -1);
|
|
|
|
/*
|
|
* Extract the information from the header.
|
|
*/
|
|
if (headerBigBlock!=0)
|
|
{
|
|
/*
|
|
* Check for the "magic number" signature and return an error if it is not
|
|
* found.
|
|
*/
|
|
if (memcmp(headerBigBlock, STORAGE_oldmagic, sizeof(STORAGE_oldmagic))==0)
|
|
{
|
|
StorageImpl_ReleaseBigBlock(This, headerBigBlock);
|
|
return STG_E_OLDFORMAT;
|
|
}
|
|
|
|
if (memcmp(headerBigBlock, STORAGE_magic, sizeof(STORAGE_magic))!=0)
|
|
{
|
|
StorageImpl_ReleaseBigBlock(This, headerBigBlock);
|
|
return STG_E_INVALIDHEADER;
|
|
}
|
|
|
|
StorageUtl_ReadWord(
|
|
headerBigBlock,
|
|
OFFSET_BIGBLOCKSIZEBITS,
|
|
&This->bigBlockSizeBits);
|
|
|
|
StorageUtl_ReadWord(
|
|
headerBigBlock,
|
|
OFFSET_SMALLBLOCKSIZEBITS,
|
|
&This->smallBlockSizeBits);
|
|
|
|
StorageUtl_ReadDWord(
|
|
headerBigBlock,
|
|
OFFSET_BBDEPOTCOUNT,
|
|
&This->bigBlockDepotCount);
|
|
|
|
StorageUtl_ReadDWord(
|
|
headerBigBlock,
|
|
OFFSET_ROOTSTARTBLOCK,
|
|
&This->rootStartBlock);
|
|
|
|
StorageUtl_ReadDWord(
|
|
headerBigBlock,
|
|
OFFSET_SBDEPOTSTART,
|
|
&This->smallBlockDepotStart);
|
|
|
|
StorageUtl_ReadDWord(
|
|
headerBigBlock,
|
|
OFFSET_EXTBBDEPOTSTART,
|
|
&This->extBigBlockDepotStart);
|
|
|
|
StorageUtl_ReadDWord(
|
|
headerBigBlock,
|
|
OFFSET_EXTBBDEPOTCOUNT,
|
|
&This->extBigBlockDepotCount);
|
|
|
|
for (index = 0; index < COUNT_BBDEPOTINHEADER; index ++)
|
|
{
|
|
StorageUtl_ReadDWord(
|
|
headerBigBlock,
|
|
OFFSET_BBDEPOTSTART + (sizeof(ULONG)*index),
|
|
&(This->bigBlockDepotStart[index]));
|
|
}
|
|
|
|
/*
|
|
* Make the bitwise arithmetic to get the size of the blocks in bytes.
|
|
*/
|
|
if ((1 << 2) == 4)
|
|
{
|
|
This->bigBlockSize = 0x000000001 << (DWORD)This->bigBlockSizeBits;
|
|
This->smallBlockSize = 0x000000001 << (DWORD)This->smallBlockSizeBits;
|
|
}
|
|
else
|
|
{
|
|
This->bigBlockSize = 0x000000001 >> (DWORD)This->bigBlockSizeBits;
|
|
This->smallBlockSize = 0x000000001 >> (DWORD)This->smallBlockSizeBits;
|
|
}
|
|
|
|
/*
|
|
* Right now, the code is making some assumptions about the size of the
|
|
* blocks, just make sure they are what we're expecting.
|
|
*/
|
|
assert( (This->bigBlockSize==DEF_BIG_BLOCK_SIZE) &&
|
|
(This->smallBlockSize==DEF_SMALL_BLOCK_SIZE));
|
|
|
|
/*
|
|
* Release the block.
|
|
*/
|
|
StorageImpl_ReleaseBigBlock(This, headerBigBlock);
|
|
}
|
|
|
|
return hr;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Storage32Impl_SaveFileHeader
|
|
*
|
|
* This method will save to the file the header, i.e. big block -1.
|
|
*/
|
|
void StorageImpl_SaveFileHeader(
|
|
StorageImpl* This)
|
|
{
|
|
BYTE headerBigBlock[BIG_BLOCK_SIZE];
|
|
int index;
|
|
BOOL success;
|
|
|
|
/*
|
|
* Get a pointer to the big block of data containing the header.
|
|
*/
|
|
success = StorageImpl_ReadBigBlock(This, -1, headerBigBlock);
|
|
|
|
/*
|
|
* If the block read failed, the file is probably new.
|
|
*/
|
|
if (!success)
|
|
{
|
|
/*
|
|
* Initialize for all unknown fields.
|
|
*/
|
|
memset(headerBigBlock, 0, BIG_BLOCK_SIZE);
|
|
|
|
/*
|
|
* Initialize the magic number.
|
|
*/
|
|
memcpy(headerBigBlock, STORAGE_magic, sizeof(STORAGE_magic));
|
|
|
|
/*
|
|
* And a bunch of things we don't know what they mean
|
|
*/
|
|
StorageUtl_WriteWord(headerBigBlock, 0x18, 0x3b);
|
|
StorageUtl_WriteWord(headerBigBlock, 0x1a, 0x3);
|
|
StorageUtl_WriteWord(headerBigBlock, 0x1c, (WORD)-2);
|
|
StorageUtl_WriteDWord(headerBigBlock, 0x38, (DWORD)0x1000);
|
|
StorageUtl_WriteDWord(headerBigBlock, 0x40, (DWORD)0x0001);
|
|
}
|
|
|
|
/*
|
|
* Write the information to the header.
|
|
*/
|
|
if (headerBigBlock!=0)
|
|
{
|
|
StorageUtl_WriteWord(
|
|
headerBigBlock,
|
|
OFFSET_BIGBLOCKSIZEBITS,
|
|
This->bigBlockSizeBits);
|
|
|
|
StorageUtl_WriteWord(
|
|
headerBigBlock,
|
|
OFFSET_SMALLBLOCKSIZEBITS,
|
|
This->smallBlockSizeBits);
|
|
|
|
StorageUtl_WriteDWord(
|
|
headerBigBlock,
|
|
OFFSET_BBDEPOTCOUNT,
|
|
This->bigBlockDepotCount);
|
|
|
|
StorageUtl_WriteDWord(
|
|
headerBigBlock,
|
|
OFFSET_ROOTSTARTBLOCK,
|
|
This->rootStartBlock);
|
|
|
|
StorageUtl_WriteDWord(
|
|
headerBigBlock,
|
|
OFFSET_SBDEPOTSTART,
|
|
This->smallBlockDepotStart);
|
|
|
|
StorageUtl_WriteDWord(
|
|
headerBigBlock,
|
|
OFFSET_EXTBBDEPOTSTART,
|
|
This->extBigBlockDepotStart);
|
|
|
|
StorageUtl_WriteDWord(
|
|
headerBigBlock,
|
|
OFFSET_EXTBBDEPOTCOUNT,
|
|
This->extBigBlockDepotCount);
|
|
|
|
for (index = 0; index < COUNT_BBDEPOTINHEADER; index ++)
|
|
{
|
|
StorageUtl_WriteDWord(
|
|
headerBigBlock,
|
|
OFFSET_BBDEPOTSTART + (sizeof(ULONG)*index),
|
|
(This->bigBlockDepotStart[index]));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Write the big block back to the file.
|
|
*/
|
|
StorageImpl_WriteBigBlock(This, -1, headerBigBlock);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Storage32Impl_ReadProperty
|
|
*
|
|
* This method will read the specified property from the property chain.
|
|
*/
|
|
BOOL StorageImpl_ReadProperty(
|
|
StorageImpl* This,
|
|
ULONG index,
|
|
StgProperty* buffer)
|
|
{
|
|
BYTE currentProperty[PROPSET_BLOCK_SIZE];
|
|
ULARGE_INTEGER offsetInPropSet;
|
|
BOOL readSucessful;
|
|
ULONG bytesRead;
|
|
|
|
offsetInPropSet.HighPart = 0;
|
|
offsetInPropSet.LowPart = index * PROPSET_BLOCK_SIZE;
|
|
|
|
readSucessful = BlockChainStream_ReadAt(
|
|
This->rootBlockChain,
|
|
offsetInPropSet,
|
|
PROPSET_BLOCK_SIZE,
|
|
currentProperty,
|
|
&bytesRead);
|
|
|
|
if (readSucessful)
|
|
{
|
|
memset(buffer->name, 0, sizeof(buffer->name));
|
|
memcpy(
|
|
buffer->name,
|
|
currentProperty+OFFSET_PS_NAME,
|
|
PROPERTY_NAME_BUFFER_LEN );
|
|
|
|
memcpy(&buffer->propertyType, currentProperty + OFFSET_PS_PROPERTYTYPE, 1);
|
|
|
|
StorageUtl_ReadWord(
|
|
currentProperty,
|
|
OFFSET_PS_NAMELENGTH,
|
|
&buffer->sizeOfNameString);
|
|
|
|
StorageUtl_ReadDWord(
|
|
currentProperty,
|
|
OFFSET_PS_PREVIOUSPROP,
|
|
&buffer->previousProperty);
|
|
|
|
StorageUtl_ReadDWord(
|
|
currentProperty,
|
|
OFFSET_PS_NEXTPROP,
|
|
&buffer->nextProperty);
|
|
|
|
StorageUtl_ReadDWord(
|
|
currentProperty,
|
|
OFFSET_PS_DIRPROP,
|
|
&buffer->dirProperty);
|
|
|
|
StorageUtl_ReadGUID(
|
|
currentProperty,
|
|
OFFSET_PS_GUID,
|
|
&buffer->propertyUniqueID);
|
|
|
|
StorageUtl_ReadDWord(
|
|
currentProperty,
|
|
OFFSET_PS_TSS1,
|
|
&buffer->timeStampS1);
|
|
|
|
StorageUtl_ReadDWord(
|
|
currentProperty,
|
|
OFFSET_PS_TSD1,
|
|
&buffer->timeStampD1);
|
|
|
|
StorageUtl_ReadDWord(
|
|
currentProperty,
|
|
OFFSET_PS_TSS2,
|
|
&buffer->timeStampS2);
|
|
|
|
StorageUtl_ReadDWord(
|
|
currentProperty,
|
|
OFFSET_PS_TSD2,
|
|
&buffer->timeStampD2);
|
|
|
|
StorageUtl_ReadDWord(
|
|
currentProperty,
|
|
OFFSET_PS_STARTBLOCK,
|
|
&buffer->startingBlock);
|
|
|
|
StorageUtl_ReadDWord(
|
|
currentProperty,
|
|
OFFSET_PS_SIZE,
|
|
&buffer->size.LowPart);
|
|
|
|
buffer->size.HighPart = 0;
|
|
}
|
|
|
|
return readSucessful;
|
|
}
|
|
|
|
/*********************************************************************
|
|
* Write the specified property into the property chain
|
|
*/
|
|
BOOL StorageImpl_WriteProperty(
|
|
StorageImpl* This,
|
|
ULONG index,
|
|
StgProperty* buffer)
|
|
{
|
|
BYTE currentProperty[PROPSET_BLOCK_SIZE];
|
|
ULARGE_INTEGER offsetInPropSet;
|
|
BOOL writeSucessful;
|
|
ULONG bytesWritten;
|
|
|
|
offsetInPropSet.HighPart = 0;
|
|
offsetInPropSet.LowPart = index * PROPSET_BLOCK_SIZE;
|
|
|
|
memset(currentProperty, 0, PROPSET_BLOCK_SIZE);
|
|
|
|
memcpy(
|
|
currentProperty + OFFSET_PS_NAME,
|
|
buffer->name,
|
|
PROPERTY_NAME_BUFFER_LEN );
|
|
|
|
memcpy(currentProperty + OFFSET_PS_PROPERTYTYPE, &buffer->propertyType, 1);
|
|
|
|
/*
|
|
* Reassign the size in case of mistake....
|
|
*/
|
|
buffer->sizeOfNameString = (lstrlenW(buffer->name)+1) * sizeof(WCHAR);
|
|
|
|
StorageUtl_WriteWord(
|
|
currentProperty,
|
|
OFFSET_PS_NAMELENGTH,
|
|
buffer->sizeOfNameString);
|
|
|
|
StorageUtl_WriteDWord(
|
|
currentProperty,
|
|
OFFSET_PS_PREVIOUSPROP,
|
|
buffer->previousProperty);
|
|
|
|
StorageUtl_WriteDWord(
|
|
currentProperty,
|
|
OFFSET_PS_NEXTPROP,
|
|
buffer->nextProperty);
|
|
|
|
StorageUtl_WriteDWord(
|
|
currentProperty,
|
|
OFFSET_PS_DIRPROP,
|
|
buffer->dirProperty);
|
|
|
|
StorageUtl_WriteGUID(
|
|
currentProperty,
|
|
OFFSET_PS_GUID,
|
|
&buffer->propertyUniqueID);
|
|
|
|
StorageUtl_WriteDWord(
|
|
currentProperty,
|
|
OFFSET_PS_TSS1,
|
|
buffer->timeStampS1);
|
|
|
|
StorageUtl_WriteDWord(
|
|
currentProperty,
|
|
OFFSET_PS_TSD1,
|
|
buffer->timeStampD1);
|
|
|
|
StorageUtl_WriteDWord(
|
|
currentProperty,
|
|
OFFSET_PS_TSS2,
|
|
buffer->timeStampS2);
|
|
|
|
StorageUtl_WriteDWord(
|
|
currentProperty,
|
|
OFFSET_PS_TSD2,
|
|
buffer->timeStampD2);
|
|
|
|
StorageUtl_WriteDWord(
|
|
currentProperty,
|
|
OFFSET_PS_STARTBLOCK,
|
|
buffer->startingBlock);
|
|
|
|
StorageUtl_WriteDWord(
|
|
currentProperty,
|
|
OFFSET_PS_SIZE,
|
|
buffer->size.LowPart);
|
|
|
|
writeSucessful = BlockChainStream_WriteAt(This->rootBlockChain,
|
|
offsetInPropSet,
|
|
PROPSET_BLOCK_SIZE,
|
|
currentProperty,
|
|
&bytesWritten);
|
|
return writeSucessful;
|
|
}
|
|
|
|
BOOL StorageImpl_ReadBigBlock(
|
|
StorageImpl* This,
|
|
ULONG blockIndex,
|
|
void* buffer)
|
|
{
|
|
void* bigBlockBuffer;
|
|
|
|
bigBlockBuffer = StorageImpl_GetROBigBlock(This, blockIndex);
|
|
|
|
if (bigBlockBuffer!=0)
|
|
{
|
|
memcpy(buffer, bigBlockBuffer, This->bigBlockSize);
|
|
|
|
StorageImpl_ReleaseBigBlock(This, bigBlockBuffer);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
BOOL StorageImpl_WriteBigBlock(
|
|
StorageImpl* This,
|
|
ULONG blockIndex,
|
|
void* buffer)
|
|
{
|
|
void* bigBlockBuffer;
|
|
|
|
bigBlockBuffer = StorageImpl_GetBigBlock(This, blockIndex);
|
|
|
|
if (bigBlockBuffer!=0)
|
|
{
|
|
memcpy(bigBlockBuffer, buffer, This->bigBlockSize);
|
|
|
|
StorageImpl_ReleaseBigBlock(This, bigBlockBuffer);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
void* StorageImpl_GetROBigBlock(
|
|
StorageImpl* This,
|
|
ULONG blockIndex)
|
|
{
|
|
return BIGBLOCKFILE_GetROBigBlock(This->bigBlockFile, blockIndex);
|
|
}
|
|
|
|
void* StorageImpl_GetBigBlock(
|
|
StorageImpl* This,
|
|
ULONG blockIndex)
|
|
{
|
|
return BIGBLOCKFILE_GetBigBlock(This->bigBlockFile, blockIndex);
|
|
}
|
|
|
|
void StorageImpl_ReleaseBigBlock(
|
|
StorageImpl* This,
|
|
void* pBigBlock)
|
|
{
|
|
BIGBLOCKFILE_ReleaseBigBlock(This->bigBlockFile, pBigBlock);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Storage32Impl_SmallBlocksToBigBlocks
|
|
*
|
|
* This method will convert a small block chain to a big block chain.
|
|
* The small block chain will be destroyed.
|
|
*/
|
|
BlockChainStream* Storage32Impl_SmallBlocksToBigBlocks(
|
|
StorageImpl* This,
|
|
SmallBlockChainStream** ppsbChain)
|
|
{
|
|
ULONG bbHeadOfChain = BLOCK_END_OF_CHAIN;
|
|
ULARGE_INTEGER size, offset;
|
|
ULONG cbRead, cbWritten, cbTotalRead, cbTotalWritten;
|
|
ULONG propertyIndex;
|
|
BOOL successRead, successWrite;
|
|
StgProperty chainProperty;
|
|
BYTE buffer[DEF_SMALL_BLOCK_SIZE];
|
|
BlockChainStream *bbTempChain = NULL;
|
|
BlockChainStream *bigBlockChain = NULL;
|
|
|
|
/*
|
|
* Create a temporary big block chain that doesn't have
|
|
* an associated property. This temporary chain will be
|
|
* used to copy data from small blocks to big blocks.
|
|
*/
|
|
bbTempChain = BlockChainStream_Construct(This,
|
|
&bbHeadOfChain,
|
|
PROPERTY_NULL);
|
|
|
|
/*
|
|
* Grow the big block chain.
|
|
*/
|
|
size = SmallBlockChainStream_GetSize(*ppsbChain);
|
|
BlockChainStream_SetSize(bbTempChain, size);
|
|
|
|
/*
|
|
* Copy the contents of the small block chain to the big block chain
|
|
* by small block size increments.
|
|
*/
|
|
offset.LowPart = 0;
|
|
offset.HighPart = 0;
|
|
cbTotalRead = 0;
|
|
cbTotalWritten = 0;
|
|
|
|
do
|
|
{
|
|
successRead = SmallBlockChainStream_ReadAt(*ppsbChain,
|
|
offset,
|
|
sizeof(buffer),
|
|
buffer,
|
|
&cbRead);
|
|
cbTotalRead += cbRead;
|
|
|
|
successWrite = BlockChainStream_WriteAt(bbTempChain,
|
|
offset,
|
|
cbRead,
|
|
buffer,
|
|
&cbWritten);
|
|
cbTotalWritten += cbWritten;
|
|
|
|
offset.LowPart += This->smallBlockSize;
|
|
|
|
} while (successRead && successWrite);
|
|
|
|
assert(cbTotalRead == cbTotalWritten);
|
|
|
|
/*
|
|
* Destroy the small block chain.
|
|
*/
|
|
propertyIndex = (*ppsbChain)->ownerPropertyIndex;
|
|
size.HighPart = 0;
|
|
size.LowPart = 0;
|
|
SmallBlockChainStream_SetSize(*ppsbChain, size);
|
|
SmallBlockChainStream_Destroy(*ppsbChain);
|
|
*ppsbChain = 0;
|
|
|
|
/*
|
|
* Change the property information. This chain is now a big block chain
|
|
* and it doesn't reside in the small blocks chain anymore.
|
|
*/
|
|
StorageImpl_ReadProperty(This, propertyIndex, &chainProperty);
|
|
|
|
chainProperty.startingBlock = bbHeadOfChain;
|
|
|
|
StorageImpl_WriteProperty(This, propertyIndex, &chainProperty);
|
|
|
|
/*
|
|
* Destroy the temporary propertyless big block chain.
|
|
* Create a new big block chain associated with this property.
|
|
*/
|
|
BlockChainStream_Destroy(bbTempChain);
|
|
bigBlockChain = BlockChainStream_Construct(This,
|
|
NULL,
|
|
propertyIndex);
|
|
|
|
return bigBlockChain;
|
|
}
|
|
|
|
/******************************************************************************
|
|
** Storage32InternalImpl implementation
|
|
*/
|
|
|
|
StorageInternalImpl* StorageInternalImpl_Construct(
|
|
StorageImpl* ancestorStorage,
|
|
ULONG rootPropertyIndex)
|
|
{
|
|
StorageInternalImpl* newStorage;
|
|
|
|
/*
|
|
* Allocate space for the new storage object
|
|
*/
|
|
newStorage = HeapAlloc(GetProcessHeap(), 0, sizeof(StorageInternalImpl));
|
|
|
|
if (newStorage!=0)
|
|
{
|
|
memset(newStorage, 0, sizeof(StorageInternalImpl));
|
|
|
|
/*
|
|
* Initialize the virtual function table.
|
|
*/
|
|
newStorage->lpvtbl = &Storage32InternalImpl_Vtbl;
|
|
newStorage->v_destructor = &StorageInternalImpl_Destroy;
|
|
|
|
/*
|
|
* Keep the ancestor storage pointer and nail a reference to it.
|
|
*/
|
|
newStorage->ancestorStorage = ancestorStorage;
|
|
StorageBaseImpl_AddRef((IStorage*)(newStorage->ancestorStorage));
|
|
|
|
/*
|
|
* Keep the index of the root property set for this storage,
|
|
*/
|
|
newStorage->rootPropertySetIndex = rootPropertyIndex;
|
|
|
|
return newStorage;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void StorageInternalImpl_Destroy(
|
|
StorageInternalImpl* This)
|
|
{
|
|
StorageBaseImpl_Release((IStorage*)This->ancestorStorage);
|
|
HeapFree(GetProcessHeap(), 0, This);
|
|
}
|
|
|
|
/******************************************************************************
|
|
**
|
|
** Storage32InternalImpl_Commit
|
|
**
|
|
** The non-root storages cannot be opened in transacted mode thus this function
|
|
** does nothing.
|
|
*/
|
|
HRESULT WINAPI StorageInternalImpl_Commit(
|
|
IStorage* iface,
|
|
DWORD grfCommitFlags) /* [in] */
|
|
{
|
|
return S_OK;
|
|
}
|
|
|
|
/******************************************************************************
|
|
**
|
|
** Storage32InternalImpl_Revert
|
|
**
|
|
** The non-root storages cannot be opened in transacted mode thus this function
|
|
** does nothing.
|
|
*/
|
|
HRESULT WINAPI StorageInternalImpl_Revert(
|
|
IStorage* iface)
|
|
{
|
|
return S_OK;
|
|
}
|
|
|
|
/******************************************************************************
|
|
** IEnumSTATSTGImpl implementation
|
|
*/
|
|
|
|
IEnumSTATSTGImpl* IEnumSTATSTGImpl_Construct(
|
|
StorageImpl* parentStorage,
|
|
ULONG firstPropertyNode)
|
|
{
|
|
IEnumSTATSTGImpl* newEnumeration;
|
|
|
|
newEnumeration = HeapAlloc(GetProcessHeap(), 0, sizeof(IEnumSTATSTGImpl));
|
|
|
|
if (newEnumeration!=0)
|
|
{
|
|
/*
|
|
* Set-up the virtual function table and reference count.
|
|
*/
|
|
newEnumeration->lpvtbl = &IEnumSTATSTGImpl_Vtbl;
|
|
newEnumeration->ref = 0;
|
|
|
|
/*
|
|
* We want to nail-down the reference to the storage in case the
|
|
* enumeration out-lives the storage in the client application.
|
|
*/
|
|
newEnumeration->parentStorage = parentStorage;
|
|
IStorage_AddRef((IStorage*)newEnumeration->parentStorage);
|
|
|
|
newEnumeration->firstPropertyNode = firstPropertyNode;
|
|
|
|
/*
|
|
* Initialize the search stack
|
|
*/
|
|
newEnumeration->stackSize = 0;
|
|
newEnumeration->stackMaxSize = ENUMSTATSGT_SIZE_INCREMENT;
|
|
newEnumeration->stackToVisit =
|
|
HeapAlloc(GetProcessHeap(), 0, sizeof(ULONG)*ENUMSTATSGT_SIZE_INCREMENT);
|
|
|
|
/*
|
|
* Make sure the current node of the iterator is the first one.
|
|
*/
|
|
IEnumSTATSTGImpl_Reset((IEnumSTATSTG*)newEnumeration);
|
|
}
|
|
|
|
return newEnumeration;
|
|
}
|
|
|
|
void IEnumSTATSTGImpl_Destroy(IEnumSTATSTGImpl* This)
|
|
{
|
|
IStorage_Release((IStorage*)This->parentStorage);
|
|
HeapFree(GetProcessHeap(), 0, This->stackToVisit);
|
|
HeapFree(GetProcessHeap(), 0, This);
|
|
}
|
|
|
|
HRESULT WINAPI IEnumSTATSTGImpl_QueryInterface(
|
|
IEnumSTATSTG* iface,
|
|
REFIID riid,
|
|
void** ppvObject)
|
|
{
|
|
IEnumSTATSTGImpl* const This=(IEnumSTATSTGImpl*)iface;
|
|
|
|
/*
|
|
* Perform a sanity check on the parameters.
|
|
*/
|
|
if (ppvObject==0)
|
|
return E_INVALIDARG;
|
|
|
|
/*
|
|
* Initialize the return parameter.
|
|
*/
|
|
*ppvObject = 0;
|
|
|
|
/*
|
|
* Compare the riid with the interface IDs implemented by this object.
|
|
*/
|
|
if (memcmp(&IID_IUnknown, riid, sizeof(IID_IUnknown)) == 0)
|
|
{
|
|
*ppvObject = (IEnumSTATSTG*)This;
|
|
}
|
|
else if (memcmp(&IID_IStorage, riid, sizeof(IID_IEnumSTATSTG)) == 0)
|
|
{
|
|
*ppvObject = (IEnumSTATSTG*)This;
|
|
}
|
|
|
|
/*
|
|
* Check that we obtained an interface.
|
|
*/
|
|
if ((*ppvObject)==0)
|
|
return E_NOINTERFACE;
|
|
|
|
/*
|
|
* Query Interface always increases the reference count by one when it is
|
|
* successful
|
|
*/
|
|
IEnumSTATSTGImpl_AddRef((IEnumSTATSTG*)This);
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
ULONG WINAPI IEnumSTATSTGImpl_AddRef(
|
|
IEnumSTATSTG* iface)
|
|
{
|
|
IEnumSTATSTGImpl* const This=(IEnumSTATSTGImpl*)iface;
|
|
|
|
This->ref++;
|
|
return This->ref;
|
|
}
|
|
|
|
ULONG WINAPI IEnumSTATSTGImpl_Release(
|
|
IEnumSTATSTG* iface)
|
|
{
|
|
IEnumSTATSTGImpl* const This=(IEnumSTATSTGImpl*)iface;
|
|
|
|
ULONG newRef;
|
|
|
|
This->ref--;
|
|
newRef = This->ref;
|
|
|
|
/*
|
|
* If the reference count goes down to 0, perform suicide.
|
|
*/
|
|
if (newRef==0)
|
|
{
|
|
IEnumSTATSTGImpl_Destroy(This);
|
|
}
|
|
|
|
return newRef;;
|
|
}
|
|
|
|
HRESULT WINAPI IEnumSTATSTGImpl_Next(
|
|
IEnumSTATSTG* iface,
|
|
ULONG celt,
|
|
STATSTG* rgelt,
|
|
ULONG* pceltFetched)
|
|
{
|
|
IEnumSTATSTGImpl* const This=(IEnumSTATSTGImpl*)iface;
|
|
|
|
StgProperty currentProperty;
|
|
STATSTG* currentReturnStruct = rgelt;
|
|
ULONG objectFetched = 0;
|
|
ULONG currentSearchNode;
|
|
|
|
/*
|
|
* Perform a sanity check on the parameters.
|
|
*/
|
|
if ( (rgelt==0) || ( (celt!=1) && (pceltFetched==0) ) )
|
|
return E_INVALIDARG;
|
|
|
|
/*
|
|
* To avoid the special case, get another pointer to a ULONG value if
|
|
* the caller didn't supply one.
|
|
*/
|
|
if (pceltFetched==0)
|
|
pceltFetched = &objectFetched;
|
|
|
|
/*
|
|
* Start the iteration, we will iterate until we hit the end of the
|
|
* linked list or until we hit the number of items to iterate through
|
|
*/
|
|
*pceltFetched = 0;
|
|
|
|
/*
|
|
* Start with the node at the top of the stack.
|
|
*/
|
|
currentSearchNode = IEnumSTATSTGImpl_PopSearchNode(This, FALSE);
|
|
|
|
while ( ( *pceltFetched < celt) &&
|
|
( currentSearchNode!=PROPERTY_NULL) )
|
|
{
|
|
/*
|
|
* Remove the top node from the stack
|
|
*/
|
|
IEnumSTATSTGImpl_PopSearchNode(This, TRUE);
|
|
|
|
/*
|
|
* Read the property from the storage.
|
|
*/
|
|
StorageImpl_ReadProperty(This->parentStorage,
|
|
currentSearchNode,
|
|
¤tProperty);
|
|
|
|
/*
|
|
* Copy the information to the return buffer.
|
|
*/
|
|
StorageUtl_CopyPropertyToSTATSTG(currentReturnStruct,
|
|
¤tProperty,
|
|
STATFLAG_DEFAULT);
|
|
|
|
/*
|
|
* Step to the next item in the iteration
|
|
*/
|
|
(*pceltFetched)++;
|
|
currentReturnStruct++;
|
|
|
|
/*
|
|
* Push the next search node in the search stack.
|
|
*/
|
|
IEnumSTATSTGImpl_PushSearchNode(This, currentProperty.nextProperty);
|
|
|
|
/*
|
|
* continue the iteration.
|
|
*/
|
|
currentSearchNode = IEnumSTATSTGImpl_PopSearchNode(This, FALSE);
|
|
}
|
|
|
|
if (*pceltFetched == celt)
|
|
return S_OK;
|
|
|
|
return S_FALSE;
|
|
}
|
|
|
|
|
|
HRESULT WINAPI IEnumSTATSTGImpl_Skip(
|
|
IEnumSTATSTG* iface,
|
|
ULONG celt)
|
|
{
|
|
IEnumSTATSTGImpl* const This=(IEnumSTATSTGImpl*)iface;
|
|
|
|
StgProperty currentProperty;
|
|
ULONG objectFetched = 0;
|
|
ULONG currentSearchNode;
|
|
|
|
/*
|
|
* Start with the node at the top of the stack.
|
|
*/
|
|
currentSearchNode = IEnumSTATSTGImpl_PopSearchNode(This, FALSE);
|
|
|
|
while ( (objectFetched < celt) &&
|
|
(currentSearchNode!=PROPERTY_NULL) )
|
|
{
|
|
/*
|
|
* Remove the top node from the stack
|
|
*/
|
|
IEnumSTATSTGImpl_PopSearchNode(This, TRUE);
|
|
|
|
/*
|
|
* Read the property from the storage.
|
|
*/
|
|
StorageImpl_ReadProperty(This->parentStorage,
|
|
currentSearchNode,
|
|
¤tProperty);
|
|
|
|
/*
|
|
* Step to the next item in the iteration
|
|
*/
|
|
objectFetched++;
|
|
|
|
/*
|
|
* Push the next search node in the search stack.
|
|
*/
|
|
IEnumSTATSTGImpl_PushSearchNode(This, currentProperty.nextProperty);
|
|
|
|
/*
|
|
* continue the iteration.
|
|
*/
|
|
currentSearchNode = IEnumSTATSTGImpl_PopSearchNode(This, FALSE);
|
|
}
|
|
|
|
if (objectFetched == celt)
|
|
return S_OK;
|
|
|
|
return S_FALSE;
|
|
}
|
|
|
|
HRESULT WINAPI IEnumSTATSTGImpl_Reset(
|
|
IEnumSTATSTG* iface)
|
|
{
|
|
IEnumSTATSTGImpl* const This=(IEnumSTATSTGImpl*)iface;
|
|
|
|
StgProperty rootProperty;
|
|
BOOL readSucessful;
|
|
|
|
/*
|
|
* Re-initialize the search stack to an empty stack
|
|
*/
|
|
This->stackSize = 0;
|
|
|
|
/*
|
|
* Read the root property from the storage.
|
|
*/
|
|
readSucessful = StorageImpl_ReadProperty(
|
|
This->parentStorage,
|
|
This->firstPropertyNode,
|
|
&rootProperty);
|
|
|
|
if (readSucessful)
|
|
{
|
|
assert(rootProperty.sizeOfNameString!=0);
|
|
|
|
/*
|
|
* Push the search node in the search stack.
|
|
*/
|
|
IEnumSTATSTGImpl_PushSearchNode(This, rootProperty.dirProperty);
|
|
}
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
HRESULT WINAPI IEnumSTATSTGImpl_Clone(
|
|
IEnumSTATSTG* iface,
|
|
IEnumSTATSTG** ppenum)
|
|
{
|
|
IEnumSTATSTGImpl* const This=(IEnumSTATSTGImpl*)iface;
|
|
|
|
IEnumSTATSTGImpl* newClone;
|
|
|
|
/*
|
|
* Perform a sanity check on the parameters.
|
|
*/
|
|
if (ppenum==0)
|
|
return E_INVALIDARG;
|
|
|
|
newClone = IEnumSTATSTGImpl_Construct(This->parentStorage,
|
|
This->firstPropertyNode);
|
|
|
|
|
|
/*
|
|
* The new clone enumeration must point to the same current node as
|
|
* the ole one.
|
|
*/
|
|
newClone->stackSize = This->stackSize ;
|
|
newClone->stackMaxSize = This->stackMaxSize ;
|
|
newClone->stackToVisit =
|
|
HeapAlloc(GetProcessHeap(), 0, sizeof(ULONG) * newClone->stackMaxSize);
|
|
|
|
memcpy(
|
|
newClone->stackToVisit,
|
|
This->stackToVisit,
|
|
sizeof(ULONG) * newClone->stackSize);
|
|
|
|
*ppenum = (IEnumSTATSTG*)newClone;
|
|
|
|
/*
|
|
* Don't forget to nail down a reference to the clone before
|
|
* returning it.
|
|
*/
|
|
IEnumSTATSTGImpl_AddRef(*ppenum);
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
INT IEnumSTATSTGImpl_FindParentProperty(
|
|
IEnumSTATSTGImpl *This,
|
|
ULONG childProperty,
|
|
StgProperty *currentProperty,
|
|
ULONG *thisNodeId)
|
|
{
|
|
ULONG currentSearchNode;
|
|
ULONG foundNode;
|
|
|
|
/*
|
|
* To avoid the special case, get another pointer to a ULONG value if
|
|
* the caller didn't supply one.
|
|
*/
|
|
if (thisNodeId==0)
|
|
thisNodeId = &foundNode;
|
|
|
|
/*
|
|
* Start with the node at the top of the stack.
|
|
*/
|
|
currentSearchNode = IEnumSTATSTGImpl_PopSearchNode(This, FALSE);
|
|
|
|
|
|
while (currentSearchNode!=PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* Store the current node in the returned parameters
|
|
*/
|
|
*thisNodeId = currentSearchNode;
|
|
|
|
/*
|
|
* Remove the top node from the stack
|
|
*/
|
|
IEnumSTATSTGImpl_PopSearchNode(This, TRUE);
|
|
|
|
/*
|
|
* Read the property from the storage.
|
|
*/
|
|
StorageImpl_ReadProperty(
|
|
This->parentStorage,
|
|
currentSearchNode,
|
|
currentProperty);
|
|
|
|
if (currentProperty->previousProperty == childProperty)
|
|
return PROPERTY_RELATION_PREVIOUS;
|
|
|
|
else if (currentProperty->nextProperty == childProperty)
|
|
return PROPERTY_RELATION_NEXT;
|
|
|
|
else if (currentProperty->dirProperty == childProperty)
|
|
return PROPERTY_RELATION_DIR;
|
|
|
|
/*
|
|
* Push the next search node in the search stack.
|
|
*/
|
|
IEnumSTATSTGImpl_PushSearchNode(This, currentProperty->nextProperty);
|
|
|
|
/*
|
|
* continue the iteration.
|
|
*/
|
|
currentSearchNode = IEnumSTATSTGImpl_PopSearchNode(This, FALSE);
|
|
}
|
|
|
|
return PROPERTY_NULL;
|
|
}
|
|
|
|
ULONG IEnumSTATSTGImpl_FindProperty(
|
|
IEnumSTATSTGImpl* This,
|
|
const OLECHAR* lpszPropName,
|
|
StgProperty* currentProperty)
|
|
{
|
|
ULONG currentSearchNode;
|
|
|
|
/*
|
|
* Start with the node at the top of the stack.
|
|
*/
|
|
currentSearchNode = IEnumSTATSTGImpl_PopSearchNode(This, FALSE);
|
|
|
|
while (currentSearchNode!=PROPERTY_NULL)
|
|
{
|
|
/*
|
|
* Remove the top node from the stack
|
|
*/
|
|
IEnumSTATSTGImpl_PopSearchNode(This, TRUE);
|
|
|
|
/*
|
|
* Read the property from the storage.
|
|
*/
|
|
StorageImpl_ReadProperty(This->parentStorage,
|
|
currentSearchNode,
|
|
currentProperty);
|
|
|
|
if ( propertyNameCmp(
|
|
(OLECHAR*)currentProperty->name,
|
|
(OLECHAR*)lpszPropName) == 0)
|
|
return currentSearchNode;
|
|
|
|
/*
|
|
* Push the next search node in the search stack.
|
|
*/
|
|
IEnumSTATSTGImpl_PushSearchNode(This, currentProperty->nextProperty);
|
|
|
|
/*
|
|
* continue the iteration.
|
|
*/
|
|
currentSearchNode = IEnumSTATSTGImpl_PopSearchNode(This, FALSE);
|
|
}
|
|
|
|
return PROPERTY_NULL;
|
|
}
|
|
|
|
void IEnumSTATSTGImpl_PushSearchNode(
|
|
IEnumSTATSTGImpl* This,
|
|
ULONG nodeToPush)
|
|
{
|
|
StgProperty rootProperty;
|
|
BOOL readSucessful;
|
|
|
|
/*
|
|
* First, make sure we're not trying to push an unexisting node.
|
|
*/
|
|
if (nodeToPush==PROPERTY_NULL)
|
|
return;
|
|
|
|
/*
|
|
* First push the node to the stack
|
|
*/
|
|
if (This->stackSize == This->stackMaxSize)
|
|
{
|
|
This->stackMaxSize += ENUMSTATSGT_SIZE_INCREMENT;
|
|
|
|
This->stackToVisit = HeapReAlloc(
|
|
GetProcessHeap(),
|
|
0,
|
|
This->stackToVisit,
|
|
sizeof(ULONG) * This->stackMaxSize);
|
|
}
|
|
|
|
This->stackToVisit[This->stackSize] = nodeToPush;
|
|
This->stackSize++;
|
|
|
|
/*
|
|
* Read the root property from the storage.
|
|
*/
|
|
readSucessful = StorageImpl_ReadProperty(
|
|
This->parentStorage,
|
|
nodeToPush,
|
|
&rootProperty);
|
|
|
|
if (readSucessful)
|
|
{
|
|
assert(rootProperty.sizeOfNameString!=0);
|
|
|
|
/*
|
|
* Push the previous search node in the search stack.
|
|
*/
|
|
IEnumSTATSTGImpl_PushSearchNode(This, rootProperty.previousProperty);
|
|
}
|
|
}
|
|
|
|
ULONG IEnumSTATSTGImpl_PopSearchNode(
|
|
IEnumSTATSTGImpl* This,
|
|
BOOL remove)
|
|
{
|
|
ULONG topNode;
|
|
|
|
if (This->stackSize == 0)
|
|
return PROPERTY_NULL;
|
|
|
|
topNode = This->stackToVisit[This->stackSize-1];
|
|
|
|
if (remove)
|
|
This->stackSize--;
|
|
|
|
return topNode;
|
|
}
|
|
|
|
/******************************************************************************
|
|
** StorageUtl implementation
|
|
*/
|
|
|
|
void StorageUtl_ReadWord(void* buffer, ULONG offset, WORD* value)
|
|
{
|
|
memcpy(value, (BYTE*)buffer+offset, sizeof(WORD));
|
|
}
|
|
|
|
void StorageUtl_WriteWord(void* buffer, ULONG offset, WORD value)
|
|
{
|
|
memcpy((BYTE*)buffer+offset, &value, sizeof(WORD));
|
|
}
|
|
|
|
void StorageUtl_ReadDWord(void* buffer, ULONG offset, DWORD* value)
|
|
{
|
|
memcpy(value, (BYTE*)buffer+offset, sizeof(DWORD));
|
|
}
|
|
|
|
void StorageUtl_WriteDWord(void* buffer, ULONG offset, DWORD value)
|
|
{
|
|
memcpy((BYTE*)buffer+offset, &value, sizeof(DWORD));
|
|
}
|
|
|
|
void StorageUtl_ReadGUID(void* buffer, ULONG offset, GUID* value)
|
|
{
|
|
StorageUtl_ReadDWord(buffer, offset, &(value->Data1));
|
|
StorageUtl_ReadWord(buffer, offset+4, &(value->Data2));
|
|
StorageUtl_ReadWord(buffer, offset+6, &(value->Data3));
|
|
|
|
memcpy(value->Data4, (BYTE*)buffer+offset+8, sizeof(value->Data4));
|
|
}
|
|
|
|
void StorageUtl_WriteGUID(void* buffer, ULONG offset, GUID* value)
|
|
{
|
|
StorageUtl_WriteDWord(buffer, offset, value->Data1);
|
|
StorageUtl_WriteWord(buffer, offset+4, value->Data2);
|
|
StorageUtl_WriteWord(buffer, offset+6, value->Data3);
|
|
|
|
memcpy((BYTE*)buffer+offset+8, value->Data4, sizeof(value->Data4));
|
|
}
|
|
|
|
void StorageUtl_CopyPropertyToSTATSTG(
|
|
STATSTG* destination,
|
|
StgProperty* source,
|
|
int statFlags)
|
|
{
|
|
/*
|
|
* The copy of the string occurs only when the flag is not set
|
|
*/
|
|
if ((statFlags & STATFLAG_NONAME) != 0)
|
|
{
|
|
destination->pwcsName = 0;
|
|
}
|
|
else
|
|
{
|
|
destination->pwcsName =
|
|
CoTaskMemAlloc((lstrlenW(source->name)+1)*sizeof(WCHAR));
|
|
|
|
lstrcpyW((LPWSTR)destination->pwcsName, source->name);
|
|
}
|
|
|
|
switch (source->propertyType)
|
|
{
|
|
case PROPTYPE_STORAGE:
|
|
case PROPTYPE_ROOT:
|
|
destination->type = STGTY_STORAGE;
|
|
break;
|
|
case PROPTYPE_STREAM:
|
|
destination->type = STGTY_STREAM;
|
|
break;
|
|
default:
|
|
destination->type = STGTY_STREAM;
|
|
break;
|
|
}
|
|
|
|
destination->cbSize = source->size;
|
|
/*
|
|
currentReturnStruct->mtime = {0}; TODO
|
|
currentReturnStruct->ctime = {0};
|
|
currentReturnStruct->atime = {0};
|
|
*/
|
|
destination->grfMode = 0;
|
|
destination->grfLocksSupported = 0;
|
|
destination->clsid = source->propertyUniqueID;
|
|
destination->grfStateBits = 0;
|
|
destination->reserved = 0;
|
|
}
|
|
|
|
/******************************************************************************
|
|
** BlockChainStream implementation
|
|
*/
|
|
|
|
BlockChainStream* BlockChainStream_Construct(
|
|
StorageImpl* parentStorage,
|
|
ULONG* headOfStreamPlaceHolder,
|
|
ULONG propertyIndex)
|
|
{
|
|
BlockChainStream* newStream;
|
|
ULONG blockIndex;
|
|
|
|
newStream = HeapAlloc(GetProcessHeap(), 0, sizeof(BlockChainStream));
|
|
|
|
newStream->parentStorage = parentStorage;
|
|
newStream->headOfStreamPlaceHolder = headOfStreamPlaceHolder;
|
|
newStream->ownerPropertyIndex = propertyIndex;
|
|
newStream->lastBlockNoInSequence = 0xFFFFFFFF;
|
|
newStream->tailIndex = BLOCK_END_OF_CHAIN;
|
|
newStream->numBlocks = 0;
|
|
|
|
blockIndex = BlockChainStream_GetHeadOfChain(newStream);
|
|
|
|
while (blockIndex != BLOCK_END_OF_CHAIN)
|
|
{
|
|
newStream->numBlocks++;
|
|
newStream->tailIndex = blockIndex;
|
|
|
|
blockIndex = StorageImpl_GetNextBlockInChain(
|
|
parentStorage,
|
|
blockIndex);
|
|
}
|
|
|
|
return newStream;
|
|
}
|
|
|
|
void BlockChainStream_Destroy(BlockChainStream* This)
|
|
{
|
|
HeapFree(GetProcessHeap(), 0, This);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* BlockChainStream_GetHeadOfChain
|
|
*
|
|
* Returns the head of this stream chain.
|
|
* Some special chains don't have properties, their heads are kept in
|
|
* This->headOfStreamPlaceHolder.
|
|
*
|
|
*/
|
|
ULONG BlockChainStream_GetHeadOfChain(BlockChainStream* This)
|
|
{
|
|
StgProperty chainProperty;
|
|
BOOL readSucessful;
|
|
|
|
if (This->headOfStreamPlaceHolder != 0)
|
|
return *(This->headOfStreamPlaceHolder);
|
|
|
|
if (This->ownerPropertyIndex != PROPERTY_NULL)
|
|
{
|
|
readSucessful = StorageImpl_ReadProperty(
|
|
This->parentStorage,
|
|
This->ownerPropertyIndex,
|
|
&chainProperty);
|
|
|
|
if (readSucessful)
|
|
{
|
|
return chainProperty.startingBlock;
|
|
}
|
|
}
|
|
|
|
return BLOCK_END_OF_CHAIN;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* BlockChainStream_GetCount
|
|
*
|
|
* Returns the number of blocks that comprises this chain.
|
|
* This is not the size of the stream as the last block may not be full!
|
|
*
|
|
*/
|
|
ULONG BlockChainStream_GetCount(BlockChainStream* This)
|
|
{
|
|
ULONG blockIndex;
|
|
ULONG count = 0;
|
|
|
|
blockIndex = BlockChainStream_GetHeadOfChain(This);
|
|
|
|
while (blockIndex != BLOCK_END_OF_CHAIN)
|
|
{
|
|
count++;
|
|
|
|
blockIndex = StorageImpl_GetNextBlockInChain(
|
|
This->parentStorage,
|
|
blockIndex);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* BlockChainStream_ReadAt
|
|
*
|
|
* Reads a specified number of bytes from this chain at the specified offset.
|
|
* bytesRead may be NULL.
|
|
* Failure will be returned if the specified number of bytes has not been read.
|
|
*/
|
|
BOOL BlockChainStream_ReadAt(BlockChainStream* This,
|
|
ULARGE_INTEGER offset,
|
|
ULONG size,
|
|
void* buffer,
|
|
ULONG* bytesRead)
|
|
{
|
|
ULONG blockNoInSequence = offset.LowPart / This->parentStorage->bigBlockSize;
|
|
ULONG offsetInBlock = offset.LowPart % This->parentStorage->bigBlockSize;
|
|
ULONG bytesToReadInBuffer;
|
|
ULONG blockIndex;
|
|
BYTE* bufferWalker;
|
|
BYTE* bigBlockBuffer;
|
|
|
|
if (This->lastBlockNoInSequence == 0xFFFFFFFF)
|
|
This->lastBlockNoInSequence = blockNoInSequence;
|
|
/*
|
|
* Find the first block in the stream that contains part of the buffer.
|
|
*/
|
|
if (blockNoInSequence > This->lastBlockNoInSequence)
|
|
{
|
|
ULONG temp = blockNoInSequence;
|
|
|
|
blockIndex = This->lastBlockNoInSequenceIndex;
|
|
blockNoInSequence -= This->lastBlockNoInSequence;
|
|
This->lastBlockNoInSequence = temp;
|
|
}
|
|
else
|
|
{
|
|
blockIndex = BlockChainStream_GetHeadOfChain(This);
|
|
This->lastBlockNoInSequence = blockNoInSequence;
|
|
}
|
|
|
|
while ( (blockNoInSequence > 0) && (blockIndex != BLOCK_END_OF_CHAIN))
|
|
{
|
|
blockIndex =
|
|
StorageImpl_GetNextBlockInChain(This->parentStorage, blockIndex);
|
|
|
|
blockNoInSequence--;
|
|
}
|
|
|
|
This->lastBlockNoInSequenceIndex = blockIndex;
|
|
|
|
/*
|
|
* Start reading the buffer.
|
|
*/
|
|
*bytesRead = 0;
|
|
bufferWalker = buffer;
|
|
|
|
while ( (size > 0) && (blockIndex != BLOCK_END_OF_CHAIN) )
|
|
{
|
|
/*
|
|
* Calculate how many bytes we can copy from this big block.
|
|
*/
|
|
bytesToReadInBuffer =
|
|
MIN(This->parentStorage->bigBlockSize - offsetInBlock, size);
|
|
|
|
/*
|
|
* Copy those bytes to the buffer
|
|
*/
|
|
bigBlockBuffer =
|
|
StorageImpl_GetROBigBlock(This->parentStorage, blockIndex);
|
|
|
|
memcpy(bufferWalker, bigBlockBuffer + offsetInBlock, bytesToReadInBuffer);
|
|
|
|
StorageImpl_ReleaseBigBlock(This->parentStorage, bigBlockBuffer);
|
|
|
|
/*
|
|
* Step to the next big block.
|
|
*/
|
|
blockIndex =
|
|
StorageImpl_GetNextBlockInChain(This->parentStorage, blockIndex);
|
|
|
|
bufferWalker += bytesToReadInBuffer;
|
|
size -= bytesToReadInBuffer;
|
|
*bytesRead += bytesToReadInBuffer;
|
|
offsetInBlock = 0; /* There is no offset on the next block */
|
|
|
|
}
|
|
|
|
return (size == 0);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* BlockChainStream_WriteAt
|
|
*
|
|
* Writes the specified number of bytes to this chain at the specified offset.
|
|
* bytesWritten may be NULL.
|
|
* Will fail if not all specified number of bytes have been written.
|
|
*/
|
|
BOOL BlockChainStream_WriteAt(BlockChainStream* This,
|
|
ULARGE_INTEGER offset,
|
|
ULONG size,
|
|
const void* buffer,
|
|
ULONG* bytesWritten)
|
|
{
|
|
ULONG blockNoInSequence = offset.LowPart / This->parentStorage->bigBlockSize;
|
|
ULONG offsetInBlock = offset.LowPart % This->parentStorage->bigBlockSize;
|
|
ULONG bytesToWrite;
|
|
ULONG blockIndex;
|
|
BYTE* bufferWalker;
|
|
BYTE* bigBlockBuffer;
|
|
|
|
if (This->lastBlockNoInSequence == 0xFFFFFFFF)
|
|
This->lastBlockNoInSequence = blockNoInSequence;
|
|
|
|
/*
|
|
* Find the first block in the stream that contains part of the buffer.
|
|
*/
|
|
if (blockNoInSequence > This->lastBlockNoInSequence)
|
|
{
|
|
ULONG temp = blockNoInSequence;
|
|
|
|
blockIndex = This->lastBlockNoInSequenceIndex;
|
|
blockNoInSequence -= This->lastBlockNoInSequence;
|
|
This->lastBlockNoInSequence = temp;
|
|
}
|
|
else
|
|
{
|
|
blockIndex = BlockChainStream_GetHeadOfChain(This);
|
|
This->lastBlockNoInSequence = blockNoInSequence;
|
|
}
|
|
|
|
while ( (blockNoInSequence > 0) && (blockIndex != BLOCK_END_OF_CHAIN))
|
|
{
|
|
blockIndex =
|
|
StorageImpl_GetNextBlockInChain(This->parentStorage, blockIndex);
|
|
|
|
blockNoInSequence--;
|
|
}
|
|
|
|
This->lastBlockNoInSequenceIndex = blockIndex;
|
|
|
|
/*
|
|
* Here, I'm casting away the constness on the buffer variable
|
|
* This is OK since we don't intend to modify that buffer.
|
|
*/
|
|
*bytesWritten = 0;
|
|
bufferWalker = (BYTE*)buffer;
|
|
|
|
while ( (size > 0) && (blockIndex != BLOCK_END_OF_CHAIN) )
|
|
{
|
|
/*
|
|
* Calculate how many bytes we can copy from this big block.
|
|
*/
|
|
bytesToWrite =
|
|
MIN(This->parentStorage->bigBlockSize - offsetInBlock, size);
|
|
|
|
/*
|
|
* Copy those bytes to the buffer
|
|
*/
|
|
bigBlockBuffer = StorageImpl_GetBigBlock(This->parentStorage, blockIndex);
|
|
|
|
memcpy(bigBlockBuffer + offsetInBlock, bufferWalker, bytesToWrite);
|
|
|
|
StorageImpl_ReleaseBigBlock(This->parentStorage, bigBlockBuffer);
|
|
|
|
/*
|
|
* Step to the next big block.
|
|
*/
|
|
blockIndex =
|
|
StorageImpl_GetNextBlockInChain(This->parentStorage, blockIndex);
|
|
|
|
bufferWalker += bytesToWrite;
|
|
size -= bytesToWrite;
|
|
*bytesWritten += bytesToWrite;
|
|
offsetInBlock = 0; /* There is no offset on the next block */
|
|
}
|
|
|
|
return (size == 0);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* BlockChainStream_Shrink
|
|
*
|
|
* Shrinks this chain in the big block depot.
|
|
*/
|
|
BOOL BlockChainStream_Shrink(BlockChainStream* This,
|
|
ULARGE_INTEGER newSize)
|
|
{
|
|
ULONG blockIndex, extraBlock;
|
|
ULONG numBlocks;
|
|
ULONG count = 1;
|
|
|
|
/*
|
|
* Figure out how many blocks are needed to contain the new size
|
|
*/
|
|
numBlocks = newSize.LowPart / This->parentStorage->bigBlockSize;
|
|
|
|
if ((newSize.LowPart % This->parentStorage->bigBlockSize) != 0)
|
|
numBlocks++;
|
|
|
|
blockIndex = BlockChainStream_GetHeadOfChain(This);
|
|
|
|
/*
|
|
* Go to the new end of chain
|
|
*/
|
|
while (count < numBlocks)
|
|
{
|
|
blockIndex =
|
|
StorageImpl_GetNextBlockInChain(This->parentStorage, blockIndex);
|
|
|
|
count++;
|
|
}
|
|
|
|
/* Get the next block before marking the new end */
|
|
extraBlock =
|
|
StorageImpl_GetNextBlockInChain(This->parentStorage, blockIndex);
|
|
|
|
/* Mark the new end of chain */
|
|
StorageImpl_SetNextBlockInChain(
|
|
This->parentStorage,
|
|
blockIndex,
|
|
BLOCK_END_OF_CHAIN);
|
|
|
|
This->tailIndex = blockIndex;
|
|
This->numBlocks = numBlocks;
|
|
|
|
/*
|
|
* Mark the extra blocks as free
|
|
*/
|
|
while (extraBlock != BLOCK_END_OF_CHAIN)
|
|
{
|
|
blockIndex =
|
|
StorageImpl_GetNextBlockInChain(This->parentStorage, extraBlock);
|
|
|
|
StorageImpl_FreeBigBlock(This->parentStorage, extraBlock);
|
|
extraBlock = blockIndex;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* BlockChainStream_Enlarge
|
|
*
|
|
* Grows this chain in the big block depot.
|
|
*/
|
|
BOOL BlockChainStream_Enlarge(BlockChainStream* This,
|
|
ULARGE_INTEGER newSize)
|
|
{
|
|
ULONG blockIndex, currentBlock;
|
|
ULONG newNumBlocks;
|
|
ULONG oldNumBlocks = 0;
|
|
|
|
blockIndex = BlockChainStream_GetHeadOfChain(This);
|
|
|
|
/*
|
|
* Empty chain. Create the head.
|
|
*/
|
|
if (blockIndex == BLOCK_END_OF_CHAIN)
|
|
{
|
|
blockIndex = StorageImpl_GetNextFreeBigBlock(This->parentStorage);
|
|
StorageImpl_SetNextBlockInChain(This->parentStorage,
|
|
blockIndex,
|
|
BLOCK_END_OF_CHAIN);
|
|
|
|
if (This->headOfStreamPlaceHolder != 0)
|
|
{
|
|
*(This->headOfStreamPlaceHolder) = blockIndex;
|
|
}
|
|
else
|
|
{
|
|
StgProperty chainProp;
|
|
assert(This->ownerPropertyIndex != PROPERTY_NULL);
|
|
|
|
StorageImpl_ReadProperty(
|
|
This->parentStorage,
|
|
This->ownerPropertyIndex,
|
|
&chainProp);
|
|
|
|
chainProp.startingBlock = blockIndex;
|
|
|
|
StorageImpl_WriteProperty(
|
|
This->parentStorage,
|
|
This->ownerPropertyIndex,
|
|
&chainProp);
|
|
}
|
|
|
|
This->tailIndex = blockIndex;
|
|
This->numBlocks = 1;
|
|
}
|
|
|
|
/*
|
|
* Figure out how many blocks are needed to contain this stream
|
|
*/
|
|
newNumBlocks = newSize.LowPart / This->parentStorage->bigBlockSize;
|
|
|
|
if ((newSize.LowPart % This->parentStorage->bigBlockSize) != 0)
|
|
newNumBlocks++;
|
|
|
|
/*
|
|
* Go to the current end of chain
|
|
*/
|
|
if (This->tailIndex == BLOCK_END_OF_CHAIN)
|
|
{
|
|
currentBlock = blockIndex;
|
|
|
|
while (blockIndex != BLOCK_END_OF_CHAIN)
|
|
{
|
|
This->numBlocks++;
|
|
currentBlock = blockIndex;
|
|
|
|
blockIndex =
|
|
StorageImpl_GetNextBlockInChain(This->parentStorage, currentBlock);
|
|
}
|
|
|
|
This->tailIndex = currentBlock;
|
|
}
|
|
|
|
currentBlock = This->tailIndex;
|
|
oldNumBlocks = This->numBlocks;
|
|
|
|
/*
|
|
* Add new blocks to the chain
|
|
*/
|
|
while (oldNumBlocks < newNumBlocks)
|
|
{
|
|
blockIndex = StorageImpl_GetNextFreeBigBlock(This->parentStorage);
|
|
|
|
StorageImpl_SetNextBlockInChain(
|
|
This->parentStorage,
|
|
currentBlock,
|
|
blockIndex);
|
|
|
|
StorageImpl_SetNextBlockInChain(
|
|
This->parentStorage,
|
|
blockIndex,
|
|
BLOCK_END_OF_CHAIN);
|
|
|
|
currentBlock = blockIndex;
|
|
oldNumBlocks++;
|
|
}
|
|
|
|
This->tailIndex = blockIndex;
|
|
This->numBlocks = newNumBlocks;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* BlockChainStream_SetSize
|
|
*
|
|
* Sets the size of this stream. The big block depot will be updated.
|
|
* The file will grow if we grow the chain.
|
|
*
|
|
* TODO: Free the actual blocks in the file when we shrink the chain.
|
|
* Currently, the blocks are still in the file. So the file size
|
|
* doesn't shrink even if we shrink streams.
|
|
*/
|
|
BOOL BlockChainStream_SetSize(
|
|
BlockChainStream* This,
|
|
ULARGE_INTEGER newSize)
|
|
{
|
|
ULARGE_INTEGER size = BlockChainStream_GetSize(This);
|
|
|
|
if (newSize.LowPart == size.LowPart)
|
|
return TRUE;
|
|
|
|
if (newSize.LowPart < size.LowPart)
|
|
{
|
|
BlockChainStream_Shrink(This, newSize);
|
|
}
|
|
else
|
|
{
|
|
ULARGE_INTEGER fileSize =
|
|
BIGBLOCKFILE_GetSize(This->parentStorage->bigBlockFile);
|
|
|
|
ULONG diff = newSize.LowPart - size.LowPart;
|
|
|
|
/*
|
|
* Make sure the file stays a multiple of blocksize
|
|
*/
|
|
if ((diff % This->parentStorage->bigBlockSize) != 0)
|
|
diff += (This->parentStorage->bigBlockSize -
|
|
(diff % This->parentStorage->bigBlockSize) );
|
|
|
|
fileSize.LowPart += diff;
|
|
BIGBLOCKFILE_SetSize(This->parentStorage->bigBlockFile, fileSize);
|
|
|
|
BlockChainStream_Enlarge(This, newSize);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* BlockChainStream_GetSize
|
|
*
|
|
* Returns the size of this chain.
|
|
* Will return the block count if this chain doesn't have a property.
|
|
*/
|
|
ULARGE_INTEGER BlockChainStream_GetSize(BlockChainStream* This)
|
|
{
|
|
StgProperty chainProperty;
|
|
|
|
if(This->headOfStreamPlaceHolder == NULL)
|
|
{
|
|
/*
|
|
* This chain is a data stream read the property and return
|
|
* the appropriate size
|
|
*/
|
|
StorageImpl_ReadProperty(
|
|
This->parentStorage,
|
|
This->ownerPropertyIndex,
|
|
&chainProperty);
|
|
|
|
return chainProperty.size;
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* this chain is a chain that does not have a property, figure out the
|
|
* size by making the product number of used blocks times the
|
|
* size of them
|
|
*/
|
|
ULARGE_INTEGER result;
|
|
result.HighPart = 0;
|
|
|
|
result.LowPart =
|
|
BlockChainStream_GetCount(This) *
|
|
This->parentStorage->bigBlockSize;
|
|
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/******************************************************************************
|
|
** SmallBlockChainStream implementation
|
|
*/
|
|
|
|
SmallBlockChainStream* SmallBlockChainStream_Construct(
|
|
StorageImpl* parentStorage,
|
|
ULONG propertyIndex)
|
|
{
|
|
SmallBlockChainStream* newStream;
|
|
|
|
newStream = HeapAlloc(GetProcessHeap(), 0, sizeof(SmallBlockChainStream));
|
|
|
|
newStream->parentStorage = parentStorage;
|
|
newStream->ownerPropertyIndex = propertyIndex;
|
|
|
|
return newStream;
|
|
}
|
|
|
|
void SmallBlockChainStream_Destroy(
|
|
SmallBlockChainStream* This)
|
|
{
|
|
HeapFree(GetProcessHeap(), 0, This);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SmallBlockChainStream_GetHeadOfChain
|
|
*
|
|
* Returns the head of this chain of small blocks.
|
|
*/
|
|
ULONG SmallBlockChainStream_GetHeadOfChain(
|
|
SmallBlockChainStream* This)
|
|
{
|
|
StgProperty chainProperty;
|
|
BOOL readSucessful;
|
|
|
|
if (This->ownerPropertyIndex)
|
|
{
|
|
readSucessful = StorageImpl_ReadProperty(
|
|
This->parentStorage,
|
|
This->ownerPropertyIndex,
|
|
&chainProperty);
|
|
|
|
if (readSucessful)
|
|
{
|
|
return chainProperty.startingBlock;
|
|
}
|
|
|
|
}
|
|
|
|
return BLOCK_END_OF_CHAIN;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SmallBlockChainStream_GetNextBlockInChain
|
|
*
|
|
* Returns the index of the next small block in this chain.
|
|
*
|
|
* Return Values:
|
|
* - BLOCK_END_OF_CHAIN: end of this chain
|
|
* - BLOCK_UNUSED: small block 'blockIndex' is free
|
|
*/
|
|
ULONG SmallBlockChainStream_GetNextBlockInChain(
|
|
SmallBlockChainStream* This,
|
|
ULONG blockIndex)
|
|
{
|
|
ULARGE_INTEGER offsetOfBlockInDepot;
|
|
DWORD buffer;
|
|
ULONG nextBlockInChain = BLOCK_END_OF_CHAIN;
|
|
ULONG bytesRead;
|
|
BOOL success;
|
|
|
|
offsetOfBlockInDepot.HighPart = 0;
|
|
offsetOfBlockInDepot.LowPart = blockIndex * sizeof(ULONG);
|
|
|
|
/*
|
|
* Read those bytes in the buffer from the small block file.
|
|
*/
|
|
success = BlockChainStream_ReadAt(
|
|
This->parentStorage->smallBlockDepotChain,
|
|
offsetOfBlockInDepot,
|
|
sizeof(DWORD),
|
|
&buffer,
|
|
&bytesRead);
|
|
|
|
if (success)
|
|
{
|
|
StorageUtl_ReadDWord(&buffer, 0, &nextBlockInChain);
|
|
}
|
|
|
|
return nextBlockInChain;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SmallBlockChainStream_SetNextBlockInChain
|
|
*
|
|
* Writes the index of the next block of the specified block in the small
|
|
* block depot.
|
|
* To set the end of chain use BLOCK_END_OF_CHAIN as nextBlock.
|
|
* To flag a block as free use BLOCK_UNUSED as nextBlock.
|
|
*/
|
|
void SmallBlockChainStream_SetNextBlockInChain(
|
|
SmallBlockChainStream* This,
|
|
ULONG blockIndex,
|
|
ULONG nextBlock)
|
|
{
|
|
ULARGE_INTEGER offsetOfBlockInDepot;
|
|
DWORD buffer;
|
|
ULONG bytesWritten;
|
|
|
|
offsetOfBlockInDepot.HighPart = 0;
|
|
offsetOfBlockInDepot.LowPart = blockIndex * sizeof(ULONG);
|
|
|
|
StorageUtl_WriteDWord(&buffer, 0, nextBlock);
|
|
|
|
/*
|
|
* Read those bytes in the buffer from the small block file.
|
|
*/
|
|
BlockChainStream_WriteAt(
|
|
This->parentStorage->smallBlockDepotChain,
|
|
offsetOfBlockInDepot,
|
|
sizeof(DWORD),
|
|
&buffer,
|
|
&bytesWritten);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SmallBlockChainStream_FreeBlock
|
|
*
|
|
* Flag small block 'blockIndex' as free in the small block depot.
|
|
*/
|
|
void SmallBlockChainStream_FreeBlock(
|
|
SmallBlockChainStream* This,
|
|
ULONG blockIndex)
|
|
{
|
|
SmallBlockChainStream_SetNextBlockInChain(This, blockIndex, BLOCK_UNUSED);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SmallBlockChainStream_GetNextFreeBlock
|
|
*
|
|
* Returns the index of a free small block. The small block depot will be
|
|
* enlarged if necessary. The small block chain will also be enlarged if
|
|
* necessary.
|
|
*/
|
|
ULONG SmallBlockChainStream_GetNextFreeBlock(
|
|
SmallBlockChainStream* This)
|
|
{
|
|
ULARGE_INTEGER offsetOfBlockInDepot;
|
|
DWORD buffer;
|
|
ULONG bytesRead;
|
|
ULONG blockIndex = 0;
|
|
ULONG nextBlockIndex = BLOCK_END_OF_CHAIN;
|
|
BOOL success = TRUE;
|
|
ULONG smallBlocksPerBigBlock;
|
|
|
|
offsetOfBlockInDepot.HighPart = 0;
|
|
|
|
/*
|
|
* Scan the small block depot for a free block
|
|
*/
|
|
while (nextBlockIndex != BLOCK_UNUSED)
|
|
{
|
|
offsetOfBlockInDepot.LowPart = blockIndex * sizeof(ULONG);
|
|
|
|
success = BlockChainStream_ReadAt(
|
|
This->parentStorage->smallBlockDepotChain,
|
|
offsetOfBlockInDepot,
|
|
sizeof(DWORD),
|
|
&buffer,
|
|
&bytesRead);
|
|
|
|
/*
|
|
* If we run out of space for the small block depot, enlarge it
|
|
*/
|
|
if (success)
|
|
{
|
|
StorageUtl_ReadDWord(&buffer, 0, &nextBlockIndex);
|
|
|
|
if (nextBlockIndex != BLOCK_UNUSED)
|
|
blockIndex++;
|
|
}
|
|
else
|
|
{
|
|
ULONG count =
|
|
BlockChainStream_GetCount(This->parentStorage->smallBlockDepotChain);
|
|
|
|
ULONG sbdIndex = This->parentStorage->smallBlockDepotStart;
|
|
ULONG nextBlock, newsbdIndex;
|
|
BYTE* smallBlockDepot;
|
|
|
|
nextBlock = sbdIndex;
|
|
while (nextBlock != BLOCK_END_OF_CHAIN)
|
|
{
|
|
sbdIndex = nextBlock;
|
|
nextBlock =
|
|
StorageImpl_GetNextBlockInChain(This->parentStorage, sbdIndex);
|
|
}
|
|
|
|
newsbdIndex = StorageImpl_GetNextFreeBigBlock(This->parentStorage);
|
|
if (sbdIndex != BLOCK_END_OF_CHAIN)
|
|
StorageImpl_SetNextBlockInChain(
|
|
This->parentStorage,
|
|
sbdIndex,
|
|
newsbdIndex);
|
|
|
|
StorageImpl_SetNextBlockInChain(
|
|
This->parentStorage,
|
|
newsbdIndex,
|
|
BLOCK_END_OF_CHAIN);
|
|
|
|
/*
|
|
* Initialize all the small blocks to free
|
|
*/
|
|
smallBlockDepot =
|
|
StorageImpl_GetBigBlock(This->parentStorage, newsbdIndex);
|
|
|
|
memset(smallBlockDepot, BLOCK_UNUSED, This->parentStorage->bigBlockSize);
|
|
StorageImpl_ReleaseBigBlock(This->parentStorage, smallBlockDepot);
|
|
|
|
if (count == 0)
|
|
{
|
|
/*
|
|
* We have just created the small block depot.
|
|
*/
|
|
StgProperty rootProp;
|
|
ULONG sbStartIndex;
|
|
|
|
/*
|
|
* Save it in the header
|
|
*/
|
|
This->parentStorage->smallBlockDepotStart = newsbdIndex;
|
|
StorageImpl_SaveFileHeader(This->parentStorage);
|
|
|
|
/*
|
|
* And allocate the first big block that will contain small blocks
|
|
*/
|
|
sbStartIndex =
|
|
StorageImpl_GetNextFreeBigBlock(This->parentStorage);
|
|
|
|
StorageImpl_SetNextBlockInChain(
|
|
This->parentStorage,
|
|
sbStartIndex,
|
|
BLOCK_END_OF_CHAIN);
|
|
|
|
StorageImpl_ReadProperty(
|
|
This->parentStorage,
|
|
This->parentStorage->rootPropertySetIndex,
|
|
&rootProp);
|
|
|
|
rootProp.startingBlock = sbStartIndex;
|
|
rootProp.size.HighPart = 0;
|
|
rootProp.size.LowPart = This->parentStorage->bigBlockSize;
|
|
|
|
StorageImpl_WriteProperty(
|
|
This->parentStorage,
|
|
This->parentStorage->rootPropertySetIndex,
|
|
&rootProp);
|
|
}
|
|
}
|
|
}
|
|
|
|
smallBlocksPerBigBlock =
|
|
This->parentStorage->bigBlockSize / This->parentStorage->smallBlockSize;
|
|
|
|
/*
|
|
* Verify if we have to allocate big blocks to contain small blocks
|
|
*/
|
|
if (blockIndex % smallBlocksPerBigBlock == 0)
|
|
{
|
|
StgProperty rootProp;
|
|
ULONG blocksRequired = (blockIndex / smallBlocksPerBigBlock) + 1;
|
|
|
|
StorageImpl_ReadProperty(
|
|
This->parentStorage,
|
|
This->parentStorage->rootPropertySetIndex,
|
|
&rootProp);
|
|
|
|
if (rootProp.size.LowPart <
|
|
(blocksRequired * This->parentStorage->bigBlockSize))
|
|
{
|
|
rootProp.size.LowPart += This->parentStorage->bigBlockSize;
|
|
|
|
BlockChainStream_SetSize(
|
|
This->parentStorage->smallBlockRootChain,
|
|
rootProp.size);
|
|
|
|
StorageImpl_WriteProperty(
|
|
This->parentStorage,
|
|
This->parentStorage->rootPropertySetIndex,
|
|
&rootProp);
|
|
}
|
|
}
|
|
|
|
return blockIndex;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SmallBlockChainStream_ReadAt
|
|
*
|
|
* Reads a specified number of bytes from this chain at the specified offset.
|
|
* bytesRead may be NULL.
|
|
* Failure will be returned if the specified number of bytes has not been read.
|
|
*/
|
|
BOOL SmallBlockChainStream_ReadAt(
|
|
SmallBlockChainStream* This,
|
|
ULARGE_INTEGER offset,
|
|
ULONG size,
|
|
void* buffer,
|
|
ULONG* bytesRead)
|
|
{
|
|
ULARGE_INTEGER offsetInBigBlockFile;
|
|
ULONG blockNoInSequence =
|
|
offset.LowPart / This->parentStorage->smallBlockSize;
|
|
|
|
ULONG offsetInBlock = offset.LowPart % This->parentStorage->smallBlockSize;
|
|
ULONG bytesToReadInBuffer;
|
|
ULONG blockIndex;
|
|
ULONG bytesReadFromBigBlockFile;
|
|
BYTE* bufferWalker;
|
|
|
|
/*
|
|
* This should never happen on a small block file.
|
|
*/
|
|
assert(offset.HighPart==0);
|
|
|
|
/*
|
|
* Find the first block in the stream that contains part of the buffer.
|
|
*/
|
|
blockIndex = SmallBlockChainStream_GetHeadOfChain(This);
|
|
|
|
while ( (blockNoInSequence > 0) && (blockIndex != BLOCK_END_OF_CHAIN))
|
|
{
|
|
blockIndex = SmallBlockChainStream_GetNextBlockInChain(This, blockIndex);
|
|
|
|
blockNoInSequence--;
|
|
}
|
|
|
|
/*
|
|
* Start reading the buffer.
|
|
*/
|
|
*bytesRead = 0;
|
|
bufferWalker = buffer;
|
|
|
|
while ( (size > 0) && (blockIndex != BLOCK_END_OF_CHAIN) )
|
|
{
|
|
/*
|
|
* Calculate how many bytes we can copy from this small block.
|
|
*/
|
|
bytesToReadInBuffer =
|
|
MIN(This->parentStorage->smallBlockSize - offsetInBlock, size);
|
|
|
|
/*
|
|
* Calculate the offset of the small block in the small block file.
|
|
*/
|
|
offsetInBigBlockFile.HighPart = 0;
|
|
offsetInBigBlockFile.LowPart =
|
|
blockIndex * This->parentStorage->smallBlockSize;
|
|
|
|
offsetInBigBlockFile.LowPart += offsetInBlock;
|
|
|
|
/*
|
|
* Read those bytes in the buffer from the small block file.
|
|
*/
|
|
BlockChainStream_ReadAt(This->parentStorage->smallBlockRootChain,
|
|
offsetInBigBlockFile,
|
|
bytesToReadInBuffer,
|
|
bufferWalker,
|
|
&bytesReadFromBigBlockFile);
|
|
|
|
assert(bytesReadFromBigBlockFile == bytesToReadInBuffer);
|
|
|
|
/*
|
|
* Step to the next big block.
|
|
*/
|
|
blockIndex = SmallBlockChainStream_GetNextBlockInChain(This, blockIndex);
|
|
bufferWalker += bytesToReadInBuffer;
|
|
size -= bytesToReadInBuffer;
|
|
*bytesRead += bytesToReadInBuffer;
|
|
offsetInBlock = 0; /* There is no offset on the next block */
|
|
}
|
|
|
|
return (size == 0);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SmallBlockChainStream_WriteAt
|
|
*
|
|
* Writes the specified number of bytes to this chain at the specified offset.
|
|
* bytesWritten may be NULL.
|
|
* Will fail if not all specified number of bytes have been written.
|
|
*/
|
|
BOOL SmallBlockChainStream_WriteAt(
|
|
SmallBlockChainStream* This,
|
|
ULARGE_INTEGER offset,
|
|
ULONG size,
|
|
const void* buffer,
|
|
ULONG* bytesWritten)
|
|
{
|
|
ULARGE_INTEGER offsetInBigBlockFile;
|
|
ULONG blockNoInSequence =
|
|
offset.LowPart / This->parentStorage->smallBlockSize;
|
|
|
|
ULONG offsetInBlock = offset.LowPart % This->parentStorage->smallBlockSize;
|
|
ULONG bytesToWriteInBuffer;
|
|
ULONG blockIndex;
|
|
ULONG bytesWrittenFromBigBlockFile;
|
|
BYTE* bufferWalker;
|
|
|
|
/*
|
|
* This should never happen on a small block file.
|
|
*/
|
|
assert(offset.HighPart==0);
|
|
|
|
/*
|
|
* Find the first block in the stream that contains part of the buffer.
|
|
*/
|
|
blockIndex = SmallBlockChainStream_GetHeadOfChain(This);
|
|
|
|
while ( (blockNoInSequence > 0) && (blockIndex != BLOCK_END_OF_CHAIN))
|
|
{
|
|
blockIndex = SmallBlockChainStream_GetNextBlockInChain(This, blockIndex);
|
|
|
|
blockNoInSequence--;
|
|
}
|
|
|
|
/*
|
|
* Start writing the buffer.
|
|
*
|
|
* Here, I'm casting away the constness on the buffer variable
|
|
* This is OK since we don't intend to modify that buffer.
|
|
*/
|
|
*bytesWritten = 0;
|
|
bufferWalker = (BYTE*)buffer;
|
|
while ( (size > 0) && (blockIndex != BLOCK_END_OF_CHAIN) )
|
|
{
|
|
/*
|
|
* Calculate how many bytes we can copy to this small block.
|
|
*/
|
|
bytesToWriteInBuffer =
|
|
MIN(This->parentStorage->smallBlockSize - offsetInBlock, size);
|
|
|
|
/*
|
|
* Calculate the offset of the small block in the small block file.
|
|
*/
|
|
offsetInBigBlockFile.HighPart = 0;
|
|
offsetInBigBlockFile.LowPart =
|
|
blockIndex * This->parentStorage->smallBlockSize;
|
|
|
|
offsetInBigBlockFile.LowPart += offsetInBlock;
|
|
|
|
/*
|
|
* Write those bytes in the buffer to the small block file.
|
|
*/
|
|
BlockChainStream_WriteAt(This->parentStorage->smallBlockRootChain,
|
|
offsetInBigBlockFile,
|
|
bytesToWriteInBuffer,
|
|
bufferWalker,
|
|
&bytesWrittenFromBigBlockFile);
|
|
|
|
assert(bytesWrittenFromBigBlockFile == bytesToWriteInBuffer);
|
|
|
|
/*
|
|
* Step to the next big block.
|
|
*/
|
|
blockIndex = SmallBlockChainStream_GetNextBlockInChain(This, blockIndex);
|
|
bufferWalker += bytesToWriteInBuffer;
|
|
size -= bytesToWriteInBuffer;
|
|
*bytesWritten += bytesToWriteInBuffer;
|
|
offsetInBlock = 0; /* There is no offset on the next block */
|
|
}
|
|
|
|
return (size == 0);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SmallBlockChainStream_Shrink
|
|
*
|
|
* Shrinks this chain in the small block depot.
|
|
*/
|
|
BOOL SmallBlockChainStream_Shrink(
|
|
SmallBlockChainStream* This,
|
|
ULARGE_INTEGER newSize)
|
|
{
|
|
ULONG blockIndex, extraBlock;
|
|
ULONG numBlocks;
|
|
ULONG count = 1;
|
|
|
|
numBlocks = newSize.LowPart / This->parentStorage->smallBlockSize;
|
|
|
|
if ((newSize.LowPart % This->parentStorage->smallBlockSize) != 0)
|
|
numBlocks++;
|
|
|
|
blockIndex = SmallBlockChainStream_GetHeadOfChain(This);
|
|
|
|
/*
|
|
* Go to the new end of chain
|
|
*/
|
|
while (count < numBlocks)
|
|
{
|
|
blockIndex = SmallBlockChainStream_GetNextBlockInChain(This, blockIndex);
|
|
count++;
|
|
}
|
|
|
|
/* Get the next block before marking the new end */
|
|
extraBlock = SmallBlockChainStream_GetNextBlockInChain(This, blockIndex);
|
|
|
|
/* Mark the new end of chain */
|
|
SmallBlockChainStream_SetNextBlockInChain(
|
|
This,
|
|
blockIndex,
|
|
BLOCK_END_OF_CHAIN);
|
|
|
|
/*
|
|
* Mark the extra blocks as free
|
|
*/
|
|
while (extraBlock != BLOCK_END_OF_CHAIN)
|
|
{
|
|
blockIndex = SmallBlockChainStream_GetNextBlockInChain(This, extraBlock);
|
|
SmallBlockChainStream_FreeBlock(This, extraBlock);
|
|
extraBlock = blockIndex;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SmallBlockChainStream_Enlarge
|
|
*
|
|
* Grows this chain in the small block depot.
|
|
*/
|
|
BOOL SmallBlockChainStream_Enlarge(
|
|
SmallBlockChainStream* This,
|
|
ULARGE_INTEGER newSize)
|
|
{
|
|
ULONG blockIndex, currentBlock;
|
|
ULONG newNumBlocks;
|
|
ULONG oldNumBlocks = 0;
|
|
|
|
blockIndex = SmallBlockChainStream_GetHeadOfChain(This);
|
|
|
|
/*
|
|
* Empty chain
|
|
*/
|
|
if (blockIndex == BLOCK_END_OF_CHAIN)
|
|
{
|
|
StgProperty chainProp;
|
|
|
|
StorageImpl_ReadProperty(This->parentStorage, This->ownerPropertyIndex,
|
|
&chainProp);
|
|
|
|
chainProp.startingBlock = SmallBlockChainStream_GetNextFreeBlock(This);
|
|
|
|
StorageImpl_WriteProperty(This->parentStorage, This->ownerPropertyIndex,
|
|
&chainProp);
|
|
|
|
blockIndex = chainProp.startingBlock;
|
|
SmallBlockChainStream_SetNextBlockInChain(
|
|
This,
|
|
blockIndex,
|
|
BLOCK_END_OF_CHAIN);
|
|
}
|
|
|
|
currentBlock = blockIndex;
|
|
|
|
/*
|
|
* Figure out how many blocks are needed to contain this stream
|
|
*/
|
|
newNumBlocks = newSize.LowPart / This->parentStorage->smallBlockSize;
|
|
|
|
if ((newSize.LowPart % This->parentStorage->smallBlockSize) != 0)
|
|
newNumBlocks++;
|
|
|
|
/*
|
|
* Go to the current end of chain
|
|
*/
|
|
while (blockIndex != BLOCK_END_OF_CHAIN)
|
|
{
|
|
oldNumBlocks++;
|
|
currentBlock = blockIndex;
|
|
blockIndex = SmallBlockChainStream_GetNextBlockInChain(This, currentBlock);
|
|
}
|
|
|
|
/*
|
|
* Add new blocks to the chain
|
|
*/
|
|
while (oldNumBlocks < newNumBlocks)
|
|
{
|
|
blockIndex = SmallBlockChainStream_GetNextFreeBlock(This);
|
|
SmallBlockChainStream_SetNextBlockInChain(This, currentBlock, blockIndex);
|
|
|
|
SmallBlockChainStream_SetNextBlockInChain(
|
|
This,
|
|
blockIndex,
|
|
BLOCK_END_OF_CHAIN);
|
|
|
|
currentBlock = blockIndex;
|
|
oldNumBlocks++;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SmallBlockChainStream_GetCount
|
|
*
|
|
* Returns the number of blocks that comprises this chain.
|
|
* This is not the size of this chain as the last block may not be full!
|
|
*/
|
|
ULONG SmallBlockChainStream_GetCount(SmallBlockChainStream* This)
|
|
{
|
|
ULONG blockIndex;
|
|
ULONG count = 0;
|
|
|
|
blockIndex = SmallBlockChainStream_GetHeadOfChain(This);
|
|
|
|
while (blockIndex != BLOCK_END_OF_CHAIN)
|
|
{
|
|
count++;
|
|
|
|
blockIndex = SmallBlockChainStream_GetNextBlockInChain(This, blockIndex);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SmallBlockChainStream_SetSize
|
|
*
|
|
* Sets the size of this stream.
|
|
* The file will grow if we grow the chain.
|
|
*
|
|
* TODO: Free the actual blocks in the file when we shrink the chain.
|
|
* Currently, the blocks are still in the file. So the file size
|
|
* doesn't shrink even if we shrink streams.
|
|
*/
|
|
BOOL SmallBlockChainStream_SetSize(
|
|
SmallBlockChainStream* This,
|
|
ULARGE_INTEGER newSize)
|
|
{
|
|
ULARGE_INTEGER size = SmallBlockChainStream_GetSize(This);
|
|
|
|
if (newSize.LowPart == size.LowPart)
|
|
return TRUE;
|
|
|
|
if (newSize.LowPart < size.LowPart)
|
|
{
|
|
SmallBlockChainStream_Shrink(This, newSize);
|
|
}
|
|
else
|
|
{
|
|
SmallBlockChainStream_Enlarge(This, newSize);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* SmallBlockChainStream_GetSize
|
|
*
|
|
* Returns the size of this chain.
|
|
*/
|
|
ULARGE_INTEGER SmallBlockChainStream_GetSize(SmallBlockChainStream* This)
|
|
{
|
|
StgProperty chainProperty;
|
|
|
|
StorageImpl_ReadProperty(
|
|
This->parentStorage,
|
|
This->ownerPropertyIndex,
|
|
&chainProperty);
|
|
|
|
return chainProperty.size;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* StgCreateDocfile32 [OLE32.144]
|
|
* TODO Validate grfMode (STGM)
|
|
*/
|
|
HRESULT WINAPI StgCreateDocfile(
|
|
LPCOLESTR pwcsName,
|
|
DWORD grfMode,
|
|
DWORD reserved,
|
|
IStorage **ppstgOpen)
|
|
{
|
|
StorageImpl* newStorage = 0;
|
|
HANDLE hFile = INVALID_HANDLE_VALUE;
|
|
HRESULT hr = S_OK;
|
|
DWORD shareMode;
|
|
DWORD accessMode;
|
|
DWORD creationMode;
|
|
DWORD fileAttributes;
|
|
WCHAR tempFileName[MAX_PATH];
|
|
|
|
/*
|
|
* Validate the parameters
|
|
*/
|
|
if (ppstgOpen == 0)
|
|
return STG_E_INVALIDPOINTER;
|
|
|
|
/*
|
|
* Validate the STGM flags
|
|
*/
|
|
if ( FAILED( validateSTGM(grfMode) ))
|
|
return STG_E_INVALIDFLAG;
|
|
|
|
/*
|
|
* Generate a unique name.
|
|
*/
|
|
if (pwcsName == 0)
|
|
{
|
|
WCHAR tempPath[MAX_PATH];
|
|
WCHAR prefix[] = { 'S', 'T', 'O', 0 };
|
|
|
|
memset(tempPath, 0, sizeof(tempPath));
|
|
memset(tempFileName, 0, sizeof(tempFileName));
|
|
|
|
if ((GetTempPathW(MAX_PATH, tempPath)) == 0 )
|
|
tempPath[0] = '.';
|
|
|
|
if (GetTempFileNameW(tempPath, prefix, 0, tempFileName) != 0)
|
|
pwcsName = tempFileName;
|
|
else
|
|
return STG_E_INSUFFICIENTMEMORY;
|
|
}
|
|
|
|
/*
|
|
* Interpret the STGM value grfMode
|
|
*/
|
|
shareMode = GetShareModeFromSTGM(grfMode);
|
|
accessMode = GetAccessModeFromSTGM(grfMode);
|
|
creationMode = GetCreationModeFromSTGM(grfMode);
|
|
|
|
if (grfMode & STGM_DELETEONRELEASE)
|
|
fileAttributes = FILE_FLAG_RANDOM_ACCESS | FILE_FLAG_DELETE_ON_CLOSE;
|
|
else
|
|
fileAttributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS;
|
|
|
|
if (grfMode & STGM_TRANSACTED)
|
|
FIXME(ole, "Transacted mode not implemented.\n");
|
|
|
|
/*
|
|
* Initialize the "out" parameter.
|
|
*/
|
|
*ppstgOpen = 0;
|
|
|
|
hFile = CreateFileW(pwcsName,
|
|
accessMode,
|
|
shareMode,
|
|
NULL,
|
|
creationMode,
|
|
fileAttributes,
|
|
0);
|
|
|
|
if (hFile == INVALID_HANDLE_VALUE)
|
|
{
|
|
return E_FAIL;
|
|
}
|
|
|
|
/*
|
|
* Allocate and initialize the new IStorage32object.
|
|
*/
|
|
newStorage = HeapAlloc(GetProcessHeap(), 0, sizeof(StorageImpl));
|
|
|
|
if (newStorage == 0)
|
|
return STG_E_INSUFFICIENTMEMORY;
|
|
|
|
hr = StorageImpl_Construct(
|
|
newStorage,
|
|
hFile,
|
|
grfMode);
|
|
|
|
if (FAILED(hr))
|
|
return hr;
|
|
|
|
/*
|
|
* Get an "out" pointer for the caller.
|
|
*/
|
|
hr = StorageBaseImpl_QueryInterface(
|
|
(IStorage*)newStorage,
|
|
(REFIID)&IID_IStorage,
|
|
(void**)ppstgOpen);
|
|
|
|
return hr;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* StgOpenStorage32 [OLE32.148]
|
|
*/
|
|
HRESULT WINAPI StgOpenStorage(
|
|
const OLECHAR *pwcsName,
|
|
IStorage *pstgPriority,
|
|
DWORD grfMode,
|
|
SNB snbExclude,
|
|
DWORD reserved,
|
|
IStorage **ppstgOpen)
|
|
{
|
|
StorageImpl* newStorage = 0;
|
|
HRESULT hr = S_OK;
|
|
HANDLE hFile = 0;
|
|
DWORD shareMode;
|
|
DWORD accessMode;
|
|
|
|
/*
|
|
* Perform a sanity check
|
|
*/
|
|
if (( pwcsName == 0) || (ppstgOpen == 0) )
|
|
return STG_E_INVALIDPOINTER;
|
|
|
|
/*
|
|
* Validate the STGM flags
|
|
*/
|
|
if ( FAILED( validateSTGM(grfMode) ))
|
|
return STG_E_INVALIDFLAG;
|
|
|
|
/*
|
|
* Interpret the STGM value grfMode
|
|
*/
|
|
shareMode = GetShareModeFromSTGM(grfMode);
|
|
accessMode = GetAccessModeFromSTGM(grfMode);
|
|
|
|
/*
|
|
* Initialize the "out" parameter.
|
|
*/
|
|
*ppstgOpen = 0;
|
|
|
|
hFile = CreateFileW( pwcsName,
|
|
accessMode,
|
|
shareMode,
|
|
NULL,
|
|
OPEN_EXISTING,
|
|
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS,
|
|
0);
|
|
|
|
|
|
if (hFile==INVALID_HANDLE_VALUE)
|
|
{
|
|
return E_FAIL;
|
|
}
|
|
|
|
/*
|
|
* Allocate and initialize the new IStorage32object.
|
|
*/
|
|
newStorage = HeapAlloc(GetProcessHeap(), 0, sizeof(StorageImpl));
|
|
|
|
if (newStorage == 0)
|
|
return STG_E_INSUFFICIENTMEMORY;
|
|
|
|
hr = StorageImpl_Construct(
|
|
newStorage,
|
|
hFile,
|
|
grfMode);
|
|
|
|
if (FAILED(hr))
|
|
return hr;
|
|
|
|
/*
|
|
* Get an "out" pointer for the caller.
|
|
*/
|
|
hr = StorageBaseImpl_QueryInterface(
|
|
(IStorage*)newStorage,
|
|
(REFIID)&IID_IStorage,
|
|
(void**)ppstgOpen);
|
|
|
|
return hr;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* WriteClassStg32 [OLE32.148]
|
|
*
|
|
* This method will store the specified CLSID in the specified storage object
|
|
*/
|
|
HRESULT WINAPI WriteClassStg(IStorage* pStg, REFCLSID rclsid)
|
|
{
|
|
HRESULT hRes;
|
|
|
|
assert(pStg != 0);
|
|
|
|
hRes = IStorage_SetClass(pStg, rclsid);
|
|
|
|
return hRes;
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
* This method validate a STGM parameter that can contain the values below
|
|
*
|
|
* STGM_DIRECT 0x00000000
|
|
* STGM_TRANSACTED 0x00010000
|
|
* STGM_SIMPLE 0x08000000
|
|
*
|
|
* STGM_READ 0x00000000
|
|
* STGM_WRITE 0x00000001
|
|
* STGM_READWRITE 0x00000002
|
|
*
|
|
* STGM_SHARE_DENY_NONE 0x00000040
|
|
* STGM_SHARE_DENY_READ 0x00000030
|
|
* STGM_SHARE_DENY_WRITE 0x00000020
|
|
* STGM_SHARE_EXCLUSIVE 0x00000010
|
|
*
|
|
* STGM_PRIORITY 0x00040000
|
|
* STGM_DELETEONRELEASE 0x04000000
|
|
*
|
|
* STGM_CREATE 0x00001000
|
|
* STGM_CONVERT 0x00020000
|
|
* STGM_FAILIFTHERE 0x00000000
|
|
*
|
|
* STGM_NOSCRATCH 0x00100000
|
|
* STGM_NOSNAPSHOT 0x00200000
|
|
*/
|
|
static HRESULT validateSTGM(DWORD stgm)
|
|
{
|
|
BOOL bSTGM_TRANSACTED = ((stgm & STGM_TRANSACTED) == STGM_TRANSACTED);
|
|
BOOL bSTGM_SIMPLE = ((stgm & STGM_SIMPLE) == STGM_SIMPLE);
|
|
BOOL bSTGM_DIRECT = ! (bSTGM_TRANSACTED || bSTGM_SIMPLE);
|
|
|
|
BOOL bSTGM_WRITE = ((stgm & STGM_WRITE) == STGM_WRITE);
|
|
BOOL bSTGM_READWRITE = ((stgm & STGM_READWRITE) == STGM_READWRITE);
|
|
BOOL bSTGM_READ = ! (bSTGM_WRITE || bSTGM_READWRITE);
|
|
|
|
BOOL bSTGM_SHARE_DENY_NONE =
|
|
((stgm & STGM_SHARE_DENY_NONE) == STGM_SHARE_DENY_NONE);
|
|
|
|
BOOL bSTGM_SHARE_DENY_READ =
|
|
((stgm & STGM_SHARE_DENY_READ) == STGM_SHARE_DENY_READ);
|
|
|
|
BOOL bSTGM_SHARE_DENY_WRITE =
|
|
((stgm & STGM_SHARE_DENY_WRITE) == STGM_SHARE_DENY_WRITE);
|
|
|
|
BOOL bSTGM_SHARE_EXCLUSIVE =
|
|
((stgm & STGM_SHARE_EXCLUSIVE) == STGM_SHARE_EXCLUSIVE);
|
|
|
|
BOOL bSTGM_CREATE = ((stgm & STGM_CREATE) == STGM_CREATE);
|
|
BOOL bSTGM_CONVERT = ((stgm & STGM_CONVERT) == STGM_CONVERT);
|
|
|
|
BOOL bSTGM_NOSCRATCH = ((stgm & STGM_NOSCRATCH) == STGM_NOSCRATCH);
|
|
BOOL bSTGM_NOSNAPSHOT = ((stgm & STGM_NOSNAPSHOT) == STGM_NOSNAPSHOT);
|
|
|
|
/*
|
|
* STGM_DIRECT | STGM_TRANSACTED | STGM_SIMPLE
|
|
*/
|
|
if ( ! bSTGM_DIRECT )
|
|
if( bSTGM_TRANSACTED && bSTGM_SIMPLE )
|
|
return E_FAIL;
|
|
|
|
/*
|
|
* STGM_WRITE | STGM_READWRITE | STGM_READ
|
|
*/
|
|
if ( ! bSTGM_READ )
|
|
if( bSTGM_WRITE && bSTGM_READWRITE )
|
|
return E_FAIL;
|
|
|
|
/*
|
|
* STGM_SHARE_DENY_NONE | others
|
|
* (I assume here that DENY_READ implies DENY_WRITE)
|
|
*/
|
|
if ( bSTGM_SHARE_DENY_NONE )
|
|
if ( bSTGM_SHARE_DENY_READ ||
|
|
bSTGM_SHARE_DENY_WRITE ||
|
|
bSTGM_SHARE_EXCLUSIVE)
|
|
return E_FAIL;
|
|
|
|
/*
|
|
* STGM_CREATE | STGM_CONVERT
|
|
* if both are false, STGM_FAILIFTHERE is set to TRUE
|
|
*/
|
|
if ( bSTGM_CREATE && bSTGM_CONVERT )
|
|
return E_FAIL;
|
|
|
|
/*
|
|
* STGM_NOSCRATCH requires STGM_TRANSACTED
|
|
*/
|
|
if ( bSTGM_NOSCRATCH && ! bSTGM_TRANSACTED )
|
|
return E_FAIL;
|
|
|
|
/*
|
|
* STGM_NOSNAPSHOT requires STGM_TRANSACTED and
|
|
* not STGM_SHARE_EXCLUSIVE or STGM_SHARE_DENY_WRITE`
|
|
*/
|
|
if (bSTGM_NOSNAPSHOT)
|
|
{
|
|
if ( ! ( bSTGM_TRANSACTED &&
|
|
!(bSTGM_SHARE_EXCLUSIVE || bSTGM_SHARE_DENY_WRITE)) )
|
|
return E_FAIL;
|
|
}
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* GetShareModeFromSTGM
|
|
*
|
|
* This method will return a share mode flag from a STGM value.
|
|
* The STGM value is assumed valid.
|
|
*/
|
|
static DWORD GetShareModeFromSTGM(DWORD stgm)
|
|
{
|
|
DWORD dwShareMode = 0;
|
|
BOOL bSTGM_SHARE_DENY_NONE =
|
|
((stgm & STGM_SHARE_DENY_NONE) == STGM_SHARE_DENY_NONE);
|
|
|
|
BOOL bSTGM_SHARE_DENY_READ =
|
|
((stgm & STGM_SHARE_DENY_READ) == STGM_SHARE_DENY_READ);
|
|
|
|
BOOL bSTGM_SHARE_DENY_WRITE =
|
|
((stgm & STGM_SHARE_DENY_WRITE) == STGM_SHARE_DENY_WRITE);
|
|
|
|
BOOL bSTGM_SHARE_EXCLUSIVE =
|
|
((stgm & STGM_SHARE_EXCLUSIVE) == STGM_SHARE_EXCLUSIVE);
|
|
|
|
if ((bSTGM_SHARE_EXCLUSIVE) || (bSTGM_SHARE_DENY_READ))
|
|
dwShareMode = 0;
|
|
|
|
if (bSTGM_SHARE_DENY_NONE)
|
|
dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
|
|
|
|
if (bSTGM_SHARE_DENY_WRITE)
|
|
dwShareMode = FILE_SHARE_READ;
|
|
|
|
return dwShareMode;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* GetAccessModeFromSTGM
|
|
*
|
|
* This method will return an access mode flag from a STGM value.
|
|
* The STGM value is assumed valid.
|
|
*/
|
|
static DWORD GetAccessModeFromSTGM(DWORD stgm)
|
|
{
|
|
DWORD dwDesiredAccess = 0;
|
|
BOOL bSTGM_WRITE = ((stgm & STGM_WRITE) == STGM_WRITE);
|
|
BOOL bSTGM_READWRITE = ((stgm & STGM_READWRITE) == STGM_READWRITE);
|
|
BOOL bSTGM_READ = ! (bSTGM_WRITE || bSTGM_READWRITE);
|
|
|
|
if (bSTGM_READ)
|
|
dwDesiredAccess = GENERIC_READ;
|
|
|
|
if (bSTGM_WRITE)
|
|
dwDesiredAccess |= GENERIC_WRITE;
|
|
|
|
if (bSTGM_READWRITE)
|
|
dwDesiredAccess = GENERIC_READ | GENERIC_WRITE;
|
|
|
|
return dwDesiredAccess;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* GetCreationModeFromSTGM
|
|
*
|
|
* This method will return a creation mode flag from a STGM value.
|
|
* The STGM value is assumed valid.
|
|
*/
|
|
static DWORD GetCreationModeFromSTGM(DWORD stgm)
|
|
{
|
|
if ( stgm & STGM_CREATE)
|
|
return CREATE_ALWAYS;
|
|
if (stgm & STGM_CONVERT) {
|
|
FIXME(ole, "STGM_CONVERT not implemented!\n");
|
|
return CREATE_NEW;
|
|
}
|
|
/* All other cases */
|
|
if (stgm & ~ (STGM_CREATE|STGM_CONVERT))
|
|
FIXME(ole,"unhandled storage mode : 0x%08lx\n",stgm & ~ (STGM_CREATE|STGM_CONVERT));
|
|
return CREATE_NEW;
|
|
}
|