/* * Compound Storage (32 bit version) * Storage implementation * * This file contains the compound file implementation * of the storage interface. * * Copyright 1999 Francis Beaudet * Copyright 1999 Sylvain St-Germain * Copyright 1999 Thuy Nguyen */ #include #include #include #include #include "winbase.h" /* for lstrlenW() and the likes */ #include "debugtools.h" #include "storage32.h" #include "ole2.h" /* For Write/ReadClassStm */ DEFAULT_DEBUG_CHANNEL(storage) #define FILE_BEGIN 0 static const char rootPropertyName[] = "Root Entry"; /*********************************************************************** * Forward declaration of internal functions used by the method DestroyElement */ static HRESULT deleteStorageProperty( StorageImpl *parentStorage, OLECHAR *propertyToDeleteName); static HRESULT deleteStreamProperty( StorageImpl *parentStorage, ULONG foundPropertyIndexToDelete, StgProperty propertyToDelete); static HRESULT findPlaceholder( StorageImpl *storage, ULONG propertyIndexToStore, ULONG storagePropertyIndex, INT typeOfRelation); static HRESULT adjustPropertyChain( StorageImpl *This, StgProperty propertyToDelete, StgProperty parentProperty, ULONG parentPropertyId, INT typeOfRelation); /*********************************************************************** * Declaration of the functions used to manipulate StgProperty */ static ULONG getFreeProperty( StorageImpl *storage); static void updatePropertyChain( StorageImpl *storage, ULONG newPropertyIndex, StgProperty newProperty); static LONG propertyNameCmp( OLECHAR *newProperty, OLECHAR *currentProperty); /*********************************************************************** * Declaration of miscellaneous functions... */ static HRESULT validateSTGM(DWORD stgmValue); static DWORD GetShareModeFromSTGM(DWORD stgm); static DWORD GetAccessModeFromSTGM(DWORD stgm); static DWORD GetCreationModeFromSTGM(DWORD stgm); /* * Virtual function table for the IStorage32Impl class. */ static ICOM_VTABLE(IStorage) Storage32Impl_Vtbl = { ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE StorageBaseImpl_QueryInterface, StorageBaseImpl_AddRef, StorageBaseImpl_Release, StorageBaseImpl_CreateStream, StorageBaseImpl_OpenStream, StorageImpl_CreateStorage, StorageBaseImpl_OpenStorage, StorageImpl_CopyTo, StorageImpl_MoveElementTo, StorageImpl_Commit, StorageImpl_Revert, StorageBaseImpl_EnumElements, StorageImpl_DestroyElement, StorageBaseImpl_RenameElement, StorageImpl_SetElementTimes, StorageBaseImpl_SetClass, StorageImpl_SetStateBits, StorageBaseImpl_Stat }; /* * Virtual function table for the Storage32InternalImpl class. */ static ICOM_VTABLE(IStorage) Storage32InternalImpl_Vtbl = { ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE StorageBaseImpl_QueryInterface, StorageBaseImpl_AddRef, StorageBaseImpl_Release, StorageBaseImpl_CreateStream, StorageBaseImpl_OpenStream, StorageImpl_CreateStorage, StorageBaseImpl_OpenStorage, StorageImpl_CopyTo, StorageImpl_MoveElementTo, StorageInternalImpl_Commit, StorageInternalImpl_Revert, StorageBaseImpl_EnumElements, StorageImpl_DestroyElement, StorageBaseImpl_RenameElement, StorageImpl_SetElementTimes, StorageBaseImpl_SetClass, StorageImpl_SetStateBits, StorageBaseImpl_Stat }; /* * Virtual function table for the IEnumSTATSTGImpl class. */ static ICOM_VTABLE(IEnumSTATSTG) IEnumSTATSTGImpl_Vtbl = { ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE IEnumSTATSTGImpl_QueryInterface, IEnumSTATSTGImpl_AddRef, IEnumSTATSTGImpl_Release, IEnumSTATSTGImpl_Next, IEnumSTATSTGImpl_Skip, IEnumSTATSTGImpl_Reset, IEnumSTATSTGImpl_Clone }; /************************************************************************ ** Storage32BaseImpl implementatiion */ /************************************************************************ * Storage32BaseImpl_QueryInterface (IUnknown) * * This method implements the common QueryInterface for all IStorage32 * implementations contained in this file. * * See Windows documentation for more details on IUnknown methods. */ HRESULT WINAPI StorageBaseImpl_QueryInterface( IStorage* iface, REFIID riid, void** ppvObject) { ICOM_THIS(StorageBaseImpl,iface); /* * Perform a sanity check on the parameters. */ if ( (This==0) || (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 = (IStorage*)This; } else if (memcmp(&IID_IStorage, riid, sizeof(IID_IStorage)) == 0) { *ppvObject = (IStorage*)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 */ StorageBaseImpl_AddRef(iface); return S_OK; } /************************************************************************ * Storage32BaseImpl_AddRef (IUnknown) * * This method implements the common AddRef for all IStorage32 * implementations contained in this file. * * See Windows documentation for more details on IUnknown methods. */ ULONG WINAPI StorageBaseImpl_AddRef( IStorage* iface) { ICOM_THIS(StorageBaseImpl,iface); This->ref++; return This->ref; } /************************************************************************ * Storage32BaseImpl_Release (IUnknown) * * This method implements the common Release for all IStorage32 * implementations contained in this file. * * See Windows documentation for more details on IUnknown methods. */ ULONG WINAPI StorageBaseImpl_Release( IStorage* iface) { ICOM_THIS(StorageBaseImpl,iface); /* * Decrease the reference count on this object. */ This->ref--; /* * If the reference count goes down to 0, perform suicide. */ if (This->ref==0) { /* * Since we are using a system of base-classes, we want to call the * destructor of the appropriate derived class. To do this, we are * using virtual functions to implement the destructor. */ This->v_destructor(This); return 0; } return This->ref; } /************************************************************************ * Storage32BaseImpl_OpenStream (IStorage) * * This method will open the specified stream object from the current storage. * * See Windows documentation for more details on IStorage methods. */ HRESULT WINAPI StorageBaseImpl_OpenStream( IStorage* iface, const OLECHAR* pwcsName, /* [string][in] */ void* reserved1, /* [unique][in] */ DWORD grfMode, /* [in] */ DWORD reserved2, /* [in] */ IStream** ppstm) /* [out] */ { ICOM_THIS(StorageBaseImpl,iface); IEnumSTATSTGImpl* propertyEnumeration; StgStreamImpl* newStream; StgProperty currentProperty; ULONG foundPropertyIndex; TRACE("(%p, %s, %p, %lx, %ld, %p)\n", iface, debugstr_w(pwcsName), reserved1, grfMode, reserved2, ppstm); /* * Perform a sanity check on the parameters. */ if ( (pwcsName==NULL) || (ppstm==0) ) return E_INVALIDARG; /* * Initialize the out parameter */ *ppstm = 0; /* * 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; /* * Create a property enumeration to search the properties */ propertyEnumeration = IEnumSTATSTGImpl_Construct( This->ancestorStorage, This->rootPropertySetIndex); /* * Search the enumeration for the property with the given name */ foundPropertyIndex = IEnumSTATSTGImpl_FindProperty( propertyEnumeration, pwcsName, ¤tProperty); /* * Delete the property enumeration since we don't need it anymore */ IEnumSTATSTGImpl_Destroy(propertyEnumeration); /* * If it was found, construct the stream object and return a pointer to it. */ if ( (foundPropertyIndex!=PROPERTY_NULL) && (currentProperty.propertyType==PROPTYPE_STREAM) ) { newStream = StgStreamImpl_Construct(This, foundPropertyIndex); 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); return S_OK; } return E_OUTOFMEMORY; } return STG_E_FILENOTFOUND; } /************************************************************************ * Storage32BaseImpl_OpenStorage (IStorage) * * This method will open a new storage object from the current storage. * * See Windows documentation for more details on IStorage methods. */ HRESULT WINAPI StorageBaseImpl_OpenStorage( IStorage* iface, const OLECHAR* pwcsName, /* [string][unique][in] */ IStorage* pstgPriority, /* [unique][in] */ DWORD grfMode, /* [in] */ SNB snbExclude, /* [unique][in] */ DWORD reserved, /* [in] */ IStorage** ppstg) /* [out] */ { ICOM_THIS(StorageBaseImpl,iface); StorageInternalImpl* newStorage; IEnumSTATSTGImpl* propertyEnumeration; StgProperty currentProperty; ULONG foundPropertyIndex; TRACE("(%p, %s, %p, %lx, %p, %ld, %p)\n", iface, debugstr_w(pwcsName), pstgPriority, grfMode, snbExclude, reserved, ppstg); /* * Perform a sanity check on the parameters. */ if ( (This==0) || (pwcsName==NULL) || (ppstg==0) ) return E_INVALIDARG; /* * Validate the STGM flags */ if ( FAILED( validateSTGM(grfMode) )) return STG_E_INVALIDFLAG; /* * As documented. */ if ( !(grfMode & STGM_SHARE_EXCLUSIVE) || (grfMode & STGM_DELETEONRELEASE) || (grfMode & STGM_PRIORITY) ) return STG_E_INVALIDFUNCTION; /* * Initialize the out parameter */ *ppstg = 0; /* * Create a property enumeration to search the properties */ propertyEnumeration = IEnumSTATSTGImpl_Construct( This->ancestorStorage, This->rootPropertySetIndex); /* * Search the enumeration for the property with the given name */ foundPropertyIndex = IEnumSTATSTGImpl_FindProperty( propertyEnumeration, pwcsName, ¤tProperty); /* * Delete the property enumeration since we don't need it anymore */ IEnumSTATSTGImpl_Destroy(propertyEnumeration); /* * If it was found, construct the stream object and return a pointer to it. */ if ( (foundPropertyIndex!=PROPERTY_NULL) && (currentProperty.propertyType==PROPTYPE_STORAGE) ) { /* * Construct a new Storage object */ newStorage = StorageInternalImpl_Construct( This->ancestorStorage, foundPropertyIndex); if (newStorage != 0) { *ppstg = (IStorage*)newStorage; /* * Since we are returning a pointer to the interface, * we have to nail down the reference. */ StorageBaseImpl_AddRef(*ppstg); return S_OK; } return STG_E_INSUFFICIENTMEMORY; } return STG_E_FILENOTFOUND; } /************************************************************************ * Storage32BaseImpl_EnumElements (IStorage) * * This method will create an enumerator object that can be used to * retrieve informatino about all the properties in the storage object. * * See Windows documentation for more details on IStorage methods. */ HRESULT WINAPI StorageBaseImpl_EnumElements( IStorage* iface, DWORD reserved1, /* [in] */ void* reserved2, /* [size_is][unique][in] */ DWORD reserved3, /* [in] */ IEnumSTATSTG** ppenum) /* [out] */ { ICOM_THIS(StorageBaseImpl,iface); IEnumSTATSTGImpl* newEnum; TRACE("(%p, %ld, %p, %ld, %p)\n", iface, reserved1, reserved2, reserved3, ppenum); /* * Perform a sanity check on the parameters. */ if ( (This==0) || (ppenum==0)) return E_INVALIDARG; /* * Construct the enumerator. */ newEnum = IEnumSTATSTGImpl_Construct( This->ancestorStorage, This->rootPropertySetIndex); if (newEnum!=0) { *ppenum = (IEnumSTATSTG*)newEnum; /* * Don't forget to nail down a reference to the new object before * returning it. */ IEnumSTATSTGImpl_AddRef(*ppenum); return S_OK; } return E_OUTOFMEMORY; } /************************************************************************ * Storage32BaseImpl_Stat (IStorage) * * This method will retrieve information about this storage object. * * See Windows documentation for more details on IStorage methods. */ HRESULT WINAPI StorageBaseImpl_Stat( IStorage* iface, STATSTG* pstatstg, /* [out] */ DWORD grfStatFlag) /* [in] */ { ICOM_THIS(StorageBaseImpl,iface); StgProperty curProperty; BOOL readSucessful; TRACE("(%p, %p, %lx)\n", iface, pstatstg, grfStatFlag); /* * Perform a sanity check on the parameters. */ if ( (This==0) || (pstatstg==0)) return E_INVALIDARG; /* * Read the information from the property. */ readSucessful = StorageImpl_ReadProperty( 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; TRACE("(%p, %s, %s)\n", iface, debugstr_w(pwcsOldName), debugstr_w(pwcsNewName)); /* * 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; TRACE("(%p, %s, %lx, %ld, %ld, %p)\n", iface, debugstr_w(pwcsName), grfMode, reserved1, reserved2, ppstm); /* * 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) { IStorage_DestroyElement(iface, 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; TRACE("(%p, %p)\n", iface, clsid); 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; TRACE("(%p, %s, %lx, %ld, %ld, %p)\n", iface, debugstr_w(pwcsName), grfMode, reserved1, reserved2, ppstg); /* * 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) IStorage_DestroyElement(iface, 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 = IStorage_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 diff = lstrlenW(newProperty) - lstrlenW(currentProperty); if (diff == 0) { /* * We compare the string themselves only when they are of the same lenght */ diff = lstrcmpiW( newProperty, currentProperty); } 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 (diff > 0) { if (next != PROPERTY_NULL) { StorageImpl_ReadProperty(storage->ancestorStorage, next, ¤tProperty); current = next; } else { currentProperty.nextProperty = newPropertyIndex; StorageImpl_WriteProperty(storage->ancestorStorage, current, ¤tProperty); found = 1; } } else { /* * Trying to insert an item with the same name in the * subtree structure. */ assert(FALSE); } 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] */ { IEnumSTATSTG *elements = 0; STATSTG curElement, strStat; HRESULT hr; IStorage *pstgTmp, *pstgChild; IStream *pstrTmp, *pstrChild; if ((ciidExclude != 0) || (rgiidExclude != NULL) || (snbExclude != NULL)) FIXME("Exclude option not implemented\n"); TRACE("(%p, %ld, %p, %p, %p)\n", iface, ciidExclude, rgiidExclude, snbExclude, pstgDest); /* * Perform a sanity check */ if ( pstgDest == 0 ) return STG_E_INVALIDPOINTER; /* * Enumerate the elements */ hr = IStorage_EnumElements( iface, 0, 0, 0, &elements ); if ( hr != S_OK ) return hr; /* * set the class ID */ IStorage_Stat( iface, &curElement, STATFLAG_NONAME); IStorage_SetClass( pstgDest, &curElement.clsid ); do { /* * Obtain the next element */ hr = IEnumSTATSTG_Next( elements, 1, &curElement, NULL ); if ( hr == S_FALSE ) { hr = S_OK; /* done, every element has been copied */ break; } if (curElement.type == STGTY_STORAGE) { /* * open child source storage */ hr = IStorage_OpenStorage( iface, curElement.pwcsName, NULL, STGM_READ|STGM_SHARE_EXCLUSIVE, NULL, 0, &pstgChild ); if (hr != S_OK) break; /* * Check if destination storage is not a child of the source * storage, which will cause an infinite loop */ if (pstgChild == pstgDest) { IEnumSTATSTG_Release(elements); return STG_E_ACCESSDENIED; } /* * create a new storage in destination storage */ hr = IStorage_CreateStorage( pstgDest, curElement.pwcsName, STGM_FAILIFTHERE|STGM_WRITE|STGM_SHARE_EXCLUSIVE, 0, 0, &pstgTmp ); /* * if it already exist, don't create a new one use this one */ if (hr == STG_E_FILEALREADYEXISTS) { hr = IStorage_OpenStorage( pstgDest, curElement.pwcsName, NULL, STGM_WRITE|STGM_SHARE_EXCLUSIVE, NULL, 0, &pstgTmp ); } if (hr != S_OK) break; /* * do the copy recursively */ hr = IStorage_CopyTo( pstgChild, ciidExclude, rgiidExclude, snbExclude, pstgTmp ); IStorage_Release( pstgTmp ); IStorage_Release( pstgChild ); } else if (curElement.type == STGTY_STREAM) { /* * create a new stream in destination storage. If the stream already * exist, it will be deleted and a new one will be created. */ hr = IStorage_CreateStream( pstgDest, curElement.pwcsName, STGM_CREATE|STGM_WRITE|STGM_SHARE_EXCLUSIVE, 0, 0, &pstrTmp ); if (hr != S_OK) break; /* * open child stream storage */ hr = IStorage_OpenStream( iface, curElement.pwcsName, NULL, STGM_READ|STGM_SHARE_EXCLUSIVE, 0, &pstrChild ); if (hr != S_OK) break; /* * Get the size of the source stream */ IStream_Stat( pstrChild, &strStat, STATFLAG_NONAME ); /* * Set the size of the destination stream. */ IStream_SetSize(pstrTmp, strStat.cbSize); /* * do the copy */ hr = IStream_CopyTo( pstrChild, pstrTmp, strStat.cbSize, NULL, NULL ); IStream_Release( pstrTmp ); IStream_Release( pstrChild ); } else { WARN("unknown element type: %ld\n", curElement.type); } } while (hr == S_OK); /* * Clean-up */ IEnumSTATSTG_Release(elements); return hr; } /************************************************************************* * 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] */ { FIXME("not implemented!\n"); return E_NOTIMPL; } /************************************************************************* * Commit (IStorage) */ HRESULT WINAPI StorageImpl_Commit( IStorage* iface, DWORD grfCommitFlags)/* [in] */ { FIXME("(%ld): stub!\n", grfCommitFlags); return S_OK; } /************************************************************************* * Revert (IStorage) */ HRESULT WINAPI StorageImpl_Revert( IStorage* iface) { FIXME("not implemented!\n"); 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; TRACE("(%p, %s)\n", iface, debugstr_w(pwcsName)); /* * 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; } /* * Release the stream object. */ IStream_Release(pis); /* * 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] */ { FIXME("not implemented!\n"); return E_NOTIMPL; } /****************************************************************************** * SetStateBits (IStorage) */ HRESULT WINAPI StorageImpl_SetStateBits( IStorage* iface, DWORD grfStateBits,/* [in] */ DWORD grfMask) /* [in] */ { FIXME("not implemented!\n"); return E_NOTIMPL; } HRESULT StorageImpl_Construct( StorageImpl* This, HANDLE hFile, ILockBytes* pLkbyt, DWORD openFlags, BOOL fileBased) { 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, pLkbyt, openFlags, This->bigBlockSize, fileBased); 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. */ hr = StorageImpl_LoadFileHeader(This); if (FAILED(hr)) { BIGBLOCKFILE_Destructor(This->bigBlockFile); return hr; } } /* * 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) { TRACE("(%p)\n", 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); hr = S_OK; } 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; 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; buffer = (BYTE *) malloc(DEF_SMALL_BLOCK_SIZE); do { successRead = SmallBlockChainStream_ReadAt(*ppsbChain, offset, DEF_SMALL_BLOCK_SIZE, buffer, &cbRead); cbTotalRead += cbRead; successWrite = BlockChainStream_WriteAt(bbTempChain, offset, cbRead, buffer, &cbWritten); cbTotalWritten += cbWritten; offset.LowPart += This->smallBlockSize; } while (successRead && successWrite); free(buffer); 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; /* * Find the first block in the stream that contains part of the buffer. */ if ( (This->lastBlockNoInSequence == 0xFFFFFFFF) || (This->lastBlockNoInSequenceIndex == BLOCK_END_OF_CHAIN) || (blockNoInSequence < This->lastBlockNoInSequence) ) { blockIndex = BlockChainStream_GetHeadOfChain(This); This->lastBlockNoInSequence = blockNoInSequence; } else { ULONG temp = blockNoInSequence; blockIndex = This->lastBlockNoInSequenceIndex; blockNoInSequence -= This->lastBlockNoInSequence; This->lastBlockNoInSequence = temp; } 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; /* * Find the first block in the stream that contains part of the buffer. */ if ( (This->lastBlockNoInSequence == 0xFFFFFFFF) || (This->lastBlockNoInSequenceIndex == BLOCK_END_OF_CHAIN) || (blockNoInSequence < This->lastBlockNoInSequence) ) { blockIndex = BlockChainStream_GetHeadOfChain(This); This->lastBlockNoInSequence = blockNoInSequence; } else { ULONG temp = blockNoInSequence; blockIndex = This->lastBlockNoInSequenceIndex; blockNoInSequence -= This->lastBlockNoInSequence; This->lastBlockNoInSequence = temp; } 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; /* * Reset the last accessed block cache. */ This->lastBlockNoInSequence = 0xFFFFFFFF; This->lastBlockNoInSequenceIndex = BLOCK_END_OF_CHAIN; /* * 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 */ if (oldNumBlocks < newNumBlocks) { 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 = 0; 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++; } /* * If the count is 0, we have a special case, the head of the chain was * just freed. */ if (count == 0) { StgProperty chainProp; StorageImpl_ReadProperty(This->parentStorage, This->ownerPropertyIndex, &chainProp); chainProp.startingBlock = BLOCK_END_OF_CHAIN; StorageImpl_WriteProperty(This->parentStorage, This->ownerPropertyIndex, &chainProp); /* * We start freeing the chain at the head block. */ extraBlock = blockIndex; } else { /* 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] */ 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]; TRACE("(%s, %lx, %ld, %p)\n", debugstr_w(pwcsName), grfMode, reserved, ppstgOpen); /* * 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("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, NULL, grfMode, TRUE); if (FAILED(hr)) { HeapFree(GetProcessHeap(), 0, newStorage); 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; TRACE("(%s, %p, %lx, %p, %ld, %p)\n", debugstr_w(pwcsName), pstgPriority, grfMode, snbExclude, reserved, ppstgOpen); /* * 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, NULL, grfMode, TRUE); if (FAILED(hr)) { HeapFree(GetProcessHeap(), 0, newStorage); return hr; } /* * Get an "out" pointer for the caller. */ hr = StorageBaseImpl_QueryInterface( (IStorage*)newStorage, (REFIID)&IID_IStorage, (void**)ppstgOpen); return hr; } /****************************************************************************** * StgCreateDocfileOnILockBytes [OLE32.145] */ HRESULT WINAPI StgCreateDocfileOnILockBytes( ILockBytes *plkbyt, DWORD grfMode, DWORD reserved, IStorage** ppstgOpen) { StorageImpl* newStorage = 0; HRESULT hr = S_OK; /* * Validate the parameters */ if ((ppstgOpen == 0) || (plkbyt == 0)) return STG_E_INVALIDPOINTER; /* * Allocate and initialize the new IStorage object. */ newStorage = HeapAlloc(GetProcessHeap(), 0, sizeof(StorageImpl)); if (newStorage == 0) return STG_E_INSUFFICIENTMEMORY; hr = StorageImpl_Construct( newStorage, 0, plkbyt, grfMode, FALSE); if (FAILED(hr)) { HeapFree(GetProcessHeap(), 0, newStorage); return hr; } /* * Get an "out" pointer for the caller. */ hr = StorageBaseImpl_QueryInterface( (IStorage*)newStorage, (REFIID)&IID_IStorage, (void**)ppstgOpen); return hr; } /****************************************************************************** * StgOpenStorageOnILockBytes [OLE32.149] */ HRESULT WINAPI StgOpenStorageOnILockBytes( ILockBytes *plkbyt, IStorage *pstgPriority, DWORD grfMode, SNB snbExclude, DWORD reserved, IStorage **ppstgOpen) { StorageImpl* newStorage = 0; HRESULT hr = S_OK; /* * Perform a sanity check */ if ((plkbyt == 0) || (ppstgOpen == 0)) return STG_E_INVALIDPOINTER; /* * Validate the STGM flags */ if ( FAILED( validateSTGM(grfMode) )) return STG_E_INVALIDFLAG; /* * Initialize the "out" parameter. */ *ppstgOpen = 0; /* * Allocate and initialize the new IStorage object. */ newStorage = HeapAlloc(GetProcessHeap(), 0, sizeof(StorageImpl)); if (newStorage == 0) return STG_E_INSUFFICIENTMEMORY; hr = StorageImpl_Construct( newStorage, 0, plkbyt, grfMode, FALSE); if (FAILED(hr)) { HeapFree(GetProcessHeap(), 0, newStorage); return hr; } /* * Get an "out" pointer for the caller. */ hr = StorageBaseImpl_QueryInterface( (IStorage*)newStorage, (REFIID)&IID_IStorage, (void**)ppstgOpen); return hr; } /****************************************************************************** * StgIsStorageILockBytes [OLE32.147] * * Determines if the ILockBytes contains a storage object. */ HRESULT WINAPI StgIsStorageILockBytes(ILockBytes *plkbyt) { BYTE sig[8]; ULARGE_INTEGER offset; offset.HighPart = 0; offset.LowPart = 0; ILockBytes_ReadAt(plkbyt, offset, sig, sizeof(sig), NULL); if (memcmp(sig, STORAGE_magic, sizeof(STORAGE_magic)) == 0) return S_OK; return S_FALSE; } /****************************************************************************** * WriteClassStg32 [OLE32.158] * * 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; } /******************************************************************************************* * ReadClassStg * * This method reads the CLSID previously written to a storage object with the WriteClassStg. */ HRESULT WINAPI ReadClassStg(IStorage *pstg,CLSID *pclsid){ STATSTG pstatstg; HRESULT hRes; TRACE("()\n"); if(pclsid==NULL) return E_POINTER; /* * read a STATSTG structure (contains the clsid) from the storage */ hRes=IStorage_Stat(pstg,&pstatstg,STATFLAG_DEFAULT); if(SUCCEEDED(hRes)) *pclsid=pstatstg.clsid; return hRes; } /************************************************************************************* * OleLoadFromStream * * This function loads an object from stream */ HRESULT WINAPI OleLoadFromStream(IStream *pStm,REFIID iidInterface,void** ppvObj) { CLSID clsid; HRESULT res; FIXME("(),stub!\n"); res=ReadClassStm(pStm,&clsid); if (SUCCEEDED(res)){ res=CoCreateInstance(&clsid,NULL,CLSCTX_INPROC_SERVER,iidInterface,ppvObj); if (SUCCEEDED(res)) res=IPersistStream_Load((IPersistStream*)ppvObj,pStm); } return res; } /************************************************************************************************ * OleSaveToStream * * This function saves an object with the IPersistStream interface on it to the specified stream */ HRESULT WINAPI OleSaveToStream(IPersistStream *pPStm,IStream *pStm) { CLSID clsid; HRESULT res; TRACE("(%p,%p)\n",pPStm,pStm); res=IPersistStream_GetClassID(pPStm,&clsid); if (SUCCEEDED(res)){ res=WriteClassStm(pStm,&clsid); if (SUCCEEDED(res)) res=IPersistStream_Save(pPStm,pStm,FALSE); } return res; } /**************************************************************************** * 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 = GENERIC_READ; 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("STGM_CONVERT not implemented!\n"); return CREATE_NEW; } /* All other cases */ if (stgm & ~ (STGM_CREATE|STGM_CONVERT)) FIXME("unhandled storage mode : 0x%08lx\n",stgm & ~ (STGM_CREATE|STGM_CONVERT)); return CREATE_NEW; }