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/*
* 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 <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "windows.h"
#include "winerror.h"
#include "file.h"
#include "ole.h"
#include "ole2.h"
#include "objbase.h"
#include "crtdll.h"
#include "tchar.h"
#include "heap.h"
#include "winnt.h"
#include "winbase.h"
#include "debug.h"
#include "storage32.h"
#define FILE_BEGIN 0
static const char rootPropertyName[] = "Root Entry";
/***********************************************************************
* Forward declaration of internal functions used by the method DestroyElement
*/
static HRESULT deleteStorageProperty(
Storage32Impl *parentStorage,
OLECHAR32 *propertyToDeleteName);
static HRESULT deleteStreamProperty(
Storage32Impl *parentStorage,
ULONG foundPropertyIndexToDelete,
StgProperty propertyToDelete);
static HRESULT findPlaceholder(
Storage32Impl *storage,
ULONG propertyIndexToStore,
ULONG storagePropertyIndex,
INT32 typeOfRelation);
static HRESULT adjustPropertyChain(
Storage32Impl *This,
StgProperty propertyToDelete,
StgProperty parentProperty,
ULONG parentPropertyId,
INT32 typeOfRelation);
/***********************************************************************
* Declaration of the functions used to manipulate StgProperty
*/
static ULONG getFreeProperty(
Storage32Impl *storage);
static void updatePropertyChain(
Storage32Impl *storage,
ULONG newPropertyIndex,
StgProperty newProperty);
static LONG propertyNameCmp(
OLECHAR32 *newProperty,
OLECHAR32 *currentProperty);
/*
* Virtual function table for the IStorage32Impl class.
*/
static ICOM_VTABLE(IStorage32) Storage32Impl_VTable =
{
{
VTABLE_FUNC(Storage32BaseImpl_QueryInterface),
VTABLE_FUNC(Storage32BaseImpl_AddRef),
VTABLE_FUNC(Storage32BaseImpl_Release)
},
VTABLE_FUNC(Storage32BaseImpl_CreateStream),
VTABLE_FUNC(Storage32BaseImpl_OpenStream),
VTABLE_FUNC(Storage32Impl_CreateStorage),
VTABLE_FUNC(Storage32BaseImpl_OpenStorage),
VTABLE_FUNC(Storage32Impl_CopyTo),
VTABLE_FUNC(Storage32Impl_MoveElementTo),
VTABLE_FUNC(Storage32Impl_Commit),
VTABLE_FUNC(Storage32Impl_Revert),
VTABLE_FUNC(Storage32BaseImpl_EnumElements),
VTABLE_FUNC(Storage32Impl_DestroyElement),
VTABLE_FUNC(Storage32BaseImpl_RenameElement),
VTABLE_FUNC(Storage32Impl_SetElementTimes),
VTABLE_FUNC(Storage32BaseImpl_SetClass),
VTABLE_FUNC(Storage32Impl_SetStateBits),
VTABLE_FUNC(Storage32BaseImpl_Stat)
};
/*
* Virtual function table for the Storage32InternalImpl class.
*/
static ICOM_VTABLE(IStorage32) Storage32InternalImpl_VTable =
{
{
VTABLE_FUNC(Storage32BaseImpl_QueryInterface),
VTABLE_FUNC(Storage32BaseImpl_AddRef),
VTABLE_FUNC(Storage32BaseImpl_Release)
},
VTABLE_FUNC(Storage32BaseImpl_CreateStream),
VTABLE_FUNC(Storage32BaseImpl_OpenStream),
VTABLE_FUNC(Storage32Impl_CreateStorage),
VTABLE_FUNC(Storage32BaseImpl_OpenStorage),
VTABLE_FUNC(Storage32Impl_CopyTo),
VTABLE_FUNC(Storage32Impl_MoveElementTo),
VTABLE_FUNC(Storage32InternalImpl_Commit),
VTABLE_FUNC(Storage32InternalImpl_Revert),
VTABLE_FUNC(Storage32BaseImpl_EnumElements),
VTABLE_FUNC(Storage32Impl_DestroyElement),
VTABLE_FUNC(Storage32BaseImpl_RenameElement),
VTABLE_FUNC(Storage32Impl_SetElementTimes),
VTABLE_FUNC(Storage32BaseImpl_SetClass),
VTABLE_FUNC(Storage32Impl_SetStateBits),
VTABLE_FUNC(Storage32BaseImpl_Stat)
};
/*
* Virtual function table for the IEnumSTATSTGImpl class.
*/
static ICOM_VTABLE(IEnumSTATSTG) IEnumSTATSTGImpl_Vtbl =
{
{
VTABLE_FUNC(IEnumSTATSTGImpl_QueryInterface),
VTABLE_FUNC(IEnumSTATSTGImpl_AddRef),
VTABLE_FUNC(IEnumSTATSTGImpl_Release)
},
VTABLE_FUNC(IEnumSTATSTGImpl_Next),
VTABLE_FUNC(IEnumSTATSTGImpl_Skip),
VTABLE_FUNC(IEnumSTATSTGImpl_Reset),
VTABLE_FUNC(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 Storage32BaseImpl_QueryInterface(
Storage32BaseImpl* This,
REFIID riid,
void** ppvObject)
{
/*
* 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 = (IStorage32*)This;
}
else if (memcmp(&IID_IStorage, riid, sizeof(IID_IStorage)) == 0)
{
*ppvObject = (IStorage32*)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
*/
Storage32BaseImpl_AddRef(This);
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 Storage32BaseImpl_AddRef(
Storage32BaseImpl* This)
{
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 Storage32BaseImpl_Release(
Storage32BaseImpl* This)
{
/*
* 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 Storage32BaseImpl_OpenStream(
Storage32BaseImpl* This,
const OLECHAR32* pwcsName, /* [string][in] */
void* reserved1, /* [unique][in] */
DWORD grfMode, /* [in] */
DWORD reserved2, /* [in] */
IStream32** ppstm) /* [out] */
{
IEnumSTATSTGImpl* propertyEnumeration;
StgStreamImpl* newStream;
StgProperty currentProperty;
ULONG foundPropertyIndex;
/*
* Perform a sanity check on the parameters.
*/
if ( (pwcsName==NULL) || (ppstm==0) )
return E_INVALIDARG;
/*
* Initialize the out parameter
*/
*ppstm = 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,
&currentProperty);
/*
* 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)
{
/*
* Since we are returning a pointer to the interface, we have to
* nail down the reference.
*/
StgStreamImpl_AddRef(newStream);
*ppstm = (IStream32*)newStream;
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 Storage32BaseImpl_OpenStorage(
Storage32BaseImpl* This,
const OLECHAR32* pwcsName, /* [string][unique][in] */
IStorage32* pstgPriority, /* [unique][in] */
DWORD grfMode, /* [in] */
SNB32 snbExclude, /* [unique][in] */
DWORD reserved, /* [in] */
IStorage32** ppstg) /* [out] */
{
Storage32InternalImpl* newStorage;
IEnumSTATSTGImpl* propertyEnumeration;
StgProperty currentProperty;
ULONG foundPropertyIndex;
/*
* Perform a sanity check on the parameters.
*/
if ( (This==0) || (pwcsName==NULL) || (ppstg==0) )
return E_INVALIDARG;
/*
* 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,
&currentProperty);
/*
* 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 = Storage32InternalImpl_Construct(
This->ancestorStorage,
foundPropertyIndex);
if (newStorage != 0)
{
/*
* Since we are returning a pointer to the interface,
* we have to nail down the reference.
*/
Storage32BaseImpl_AddRef((Storage32BaseImpl*)newStorage);
*ppstg = (IStorage32*)newStorage;
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 Storage32BaseImpl_EnumElements(
Storage32BaseImpl* This,
DWORD reserved1, /* [in] */
void* reserved2, /* [size_is][unique][in] */
DWORD reserved3, /* [in] */
IEnumSTATSTG** ppenum) /* [out] */
{
IEnumSTATSTGImpl* newEnum;
/*
* 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)
{
/*
* Don't forget to nail down a reference to the new object before
* returning it.
*/
IEnumSTATSTGImpl_AddRef(newEnum);
*ppenum = (IEnumSTATSTG*)newEnum;
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 Storage32BaseImpl_Stat(
Storage32BaseImpl* This,
STATSTG* pstatstg, /* [out] */
DWORD grfStatFlag) /* [in] */
{
StgProperty curProperty;
BOOL32 readSucessful;
/*
* Perform a sanity check on the parameters.
*/
if ( (This==0) || (pstatstg==0))
return E_INVALIDARG;
/*
* Read the information from the property.
*/
readSucessful = Storage32Impl_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 Storage32BaseImpl_RenameElement(
Storage32BaseImpl* This,
const OLECHAR32* pwcsOldName, /* [in] */
const OLECHAR32* pwcsNewName) /* [in] */
{
IEnumSTATSTGImpl* propertyEnumeration;
StgProperty currentProperty;
ULONG foundPropertyIndex;
/*
* Create a property enumeration to search the properties
*/
propertyEnumeration = IEnumSTATSTGImpl_Construct(This->ancestorStorage,
This->rootPropertySetIndex);
/*
* Search the enumeration for the new property name
*/
foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(propertyEnumeration,
pwcsNewName,
&currentProperty);
if (foundPropertyIndex != PROPERTY_NULL)
{
/*
* There is already a property with the new name
*/
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
return STG_E_FILEALREADYEXISTS;
}
IEnumSTATSTGImpl_Reset(propertyEnumeration);
/*
* Search the enumeration for the old property name
*/
foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(propertyEnumeration,
pwcsOldName,
&currentProperty);
/*
* 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 =
( lstrlen32W(pwcsNewName)+1 ) * sizeof(WCHAR);
if (renamedProperty.sizeOfNameString > PROPERTY_NAME_BUFFER_LEN)
return STG_E_INVALIDNAME;
lstrcpy32W(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
*/
Storage32Impl_WriteProperty(
This->ancestorStorage,
renamedPropertyIndex,
&renamedProperty);
/*
* Find a spot in the property chain for our newly created property.
*/
updatePropertyChain(
(Storage32Impl*)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;
Storage32Impl_WriteProperty(
This->ancestorStorage,
foundPropertyIndex,
&currentProperty);
/*
* Invoke Destroy to get rid of the ole property and automatically redo
* the linking of it's previous and next members...
*/
Storage32Impl_DestroyElement(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 Storage32BaseImpl_CreateStream(
Storage32BaseImpl* This,
const OLECHAR32* pwcsName, /* [string][in] */
DWORD grfMode, /* [in] */
DWORD reserved1, /* [in] */
DWORD reserved2, /* [in] */
IStream32** ppstm) /* [out] */
{
IEnumSTATSTGImpl* propertyEnumeration;
StgStreamImpl* newStream;
StgProperty currentProperty, newStreamProperty;
ULONG foundPropertyIndex, newPropertyIndex;
/*
* Validate parameters
*/
if (ppstm == 0)
return STG_E_INVALIDPOINTER;
if (pwcsName == 0)
return STG_E_INVALIDNAME;
/*
* 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,
&currentProperty);
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
if (foundPropertyIndex != PROPERTY_NULL)
{
/*
* An element with this name already exists
*/
if (grfMode & STGM_CREATE)
Storage32Impl_DestroyElement(This->ancestorStorage, pwcsName);
else
return STG_E_FILEALREADYEXISTS;
}
/*
* memset the empty property
*/
memset(&newStreamProperty, 0, sizeof(StgProperty));
newStreamProperty.sizeOfNameString =
( lstrlen32W(pwcsName)+1 ) * sizeof(WCHAR);
if (newStreamProperty.sizeOfNameString > PROPERTY_NAME_BUFFER_LEN)
return STG_E_INVALIDNAME;
lstrcpy32W(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
*/
Storage32Impl_WriteProperty(
This->ancestorStorage,
newPropertyIndex,
&newStreamProperty);
/*
* Find a spot in the property chain for our newly created property.
*/
updatePropertyChain(
(Storage32Impl*)This,
newPropertyIndex,
newStreamProperty);
/*
* Open the stream to return it.
*/
newStream = StgStreamImpl_Construct(This, newPropertyIndex);
if (newStream != 0)
{
/*
* Since we are returning a pointer to the interface, we have to nail down
* the reference.
*/
StgStreamImpl_AddRef(newStream);
*ppstm = (IStream32*)newStream;
}
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 Storage32BaseImpl_SetClass(
Storage32BaseImpl* This,
REFCLSID clsid) /* [in] */
{
HRESULT hRes = E_FAIL;
StgProperty curProperty;
BOOL32 success;
success = Storage32Impl_ReadProperty(This->ancestorStorage,
This->rootPropertySetIndex,
&curProperty);
if (success)
{
curProperty.propertyUniqueID = *clsid;
success = Storage32Impl_WriteProperty(This->ancestorStorage,
This->rootPropertySetIndex,
&curProperty);
if (success)
hRes = S_OK;
}
return hRes;
}
/************************************************************************
** Storage32Impl implementation
*/
/************************************************************************
* Storage32Impl_CreateStorage
*
* This method will create the storage object within the provided storage.
*
* See Windows documentation for more details on IStorage methods.
*/
HRESULT WINAPI Storage32Impl_CreateStorage(
Storage32Impl *This,
const OLECHAR32 *pwcsName, /* [string][in] */
DWORD grfMode, /* [in] */
DWORD reserved1, /* [in] */
DWORD reserved2, /* [in] */
IStorage32 **ppstg) /* [out] */
{
IEnumSTATSTGImpl *propertyEnumeration;
StgProperty currentProperty;
StgProperty newProperty;
ULONG foundPropertyIndex;
ULONG newPropertyIndex;
HRESULT hr;
/*
* Validate parameters
*/
if (ppstg == 0)
return STG_E_INVALIDPOINTER;
if (pwcsName == 0)
return STG_E_INVALIDNAME;
/*
* 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,
&currentProperty);
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
if (foundPropertyIndex != PROPERTY_NULL)
{
/*
* An element with this name already exists
*/
if (grfMode & STGM_CREATE)
Storage32Impl_DestroyElement(This->ancestorStorage, pwcsName);
else
return STG_E_FILEALREADYEXISTS;
}
/*
* memset the empty property
*/
memset(&newProperty, 0, sizeof(StgProperty));
newProperty.sizeOfNameString = (lstrlen32W(pwcsName)+1)*sizeof(WCHAR);
if (newProperty.sizeOfNameString > PROPERTY_NAME_BUFFER_LEN)
return STG_E_INVALIDNAME;
lstrcpy32W(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
*/
Storage32Impl_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 = Storage32BaseImpl_OpenStorage(
(Storage32BaseImpl*)This,
(OLECHAR32*)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(
Storage32Impl *storage)
{
ULONG currentPropertyIndex = 0;
ULONG newPropertyIndex = PROPERTY_NULL;
BOOL32 readSucessful = TRUE;
StgProperty currentProperty;
do
{
/*
* Start by reading the root property
*/
readSucessful = Storage32Impl_ReadProperty(storage->ancestorStorage,
currentPropertyIndex,
&currentProperty);
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++)
{
Storage32Impl_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(
OLECHAR32 *newProperty,
OLECHAR32 *currentProperty)
{
LONG sizeOfNew = (lstrlen32W(newProperty) +1) * sizeof(WCHAR);
LONG sizeOfCur = (lstrlen32W(currentProperty)+1) * sizeof(WCHAR);
LONG diff = sizeOfNew - sizeOfCur;
if (diff == 0)
{
/*
* We compare the string themselves only when they are of the same lenght
*/
WCHAR wsnew[PROPERTY_NAME_MAX_LEN];
WCHAR wscur[PROPERTY_NAME_MAX_LEN];
diff = lstrcmp32W( (LPCWSTR)CRTDLL__wcsupr(
lstrcpyn32W(wsnew, newProperty, sizeOfNew)),
(LPCWSTR)CRTDLL__wcsupr(
lstrcpyn32W(wscur, currentProperty, sizeOfCur)));
}
return diff;
}
/****************************************************************************
*
* Internal Method
*
* Properly link this new element in the property chain.
*/
static void updatePropertyChain(
Storage32Impl *storage,
ULONG newPropertyIndex,
StgProperty newProperty)
{
StgProperty currentProperty;
/*
* Read the root property
*/
Storage32Impl_ReadProperty(storage->ancestorStorage,
storage->rootPropertySetIndex,
&currentProperty);
if (currentProperty.dirProperty != PROPERTY_NULL)
{
/*
* The root storage contains some element, therefore, start the research
* for the appropriate location.
*/
BOOL32 found = 0;
ULONG current, next, previous, currentPropertyId;
/*
* Keep the StgProperty sequence number of the storage first property
*/
currentPropertyId = currentProperty.dirProperty;
/*
* Read
*/
Storage32Impl_ReadProperty(storage->ancestorStorage,
currentProperty.dirProperty,
&currentProperty);
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)
{
Storage32Impl_ReadProperty(storage->ancestorStorage,
previous,
&currentProperty);
current = previous;
}
else
{
currentProperty.previousProperty = newPropertyIndex;
Storage32Impl_WriteProperty(storage->ancestorStorage,
current,
&currentProperty);
found = 1;
}
}
else
{
if (next != PROPERTY_NULL)
{
Storage32Impl_ReadProperty(storage->ancestorStorage,
next,
&currentProperty);
current = next;
}
else
{
currentProperty.nextProperty = newPropertyIndex;
Storage32Impl_WriteProperty(storage->ancestorStorage,
current,
&currentProperty);
found = 1;
}
}
previous = currentProperty.previousProperty;
next = currentProperty.nextProperty;
}
}
else
{
/*
* The root storage is empty, link the new property to it's dir property
*/
currentProperty.dirProperty = newPropertyIndex;
Storage32Impl_WriteProperty(storage->ancestorStorage,
storage->rootPropertySetIndex,
&currentProperty);
}
}
HRESULT WINAPI Storage32Impl_CopyTo(
Storage32Impl *This,
DWORD ciidExclude, /* [in] */
const IID *rgiidExclude,/* [size_is][unique][in] */
SNB32 snbExclude, /* [unique][in] */
IStorage32 *pstgDest) /* [unique][in] */
{
return E_NOTIMPL;
}
HRESULT WINAPI Storage32Impl_MoveElementTo(
Storage32Impl *This,
const OLECHAR32 *pwcsName, /* [string][in] */
IStorage32 *pstgDest, /* [unique][in] */
const OLECHAR32 *pwcsNewName,/* [string][in] */
DWORD grfFlags) /* [in] */
{
return E_NOTIMPL;
}
HRESULT WINAPI Storage32Impl_Commit(
Storage32Impl *This,
DWORD grfCommitFlags)/* [in] */
{
return E_NOTIMPL;
}
HRESULT WINAPI Storage32Impl_Revert(
Storage32Impl* This)
{
return E_NOTIMPL;
}
/*************************************************************************
* DestroyElement.
*
* Stategy: This implementation is build this way for simplicity not for speed.
* I allways 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 Storage32Impl_DestroyElement(
Storage32Impl *This,
const OLECHAR32 *pwcsName)/* [string][in] */
{
IEnumSTATSTGImpl* propertyEnumeration;
HRESULT hr = S_OK;
BOOL32 res;
StgProperty propertyToDelete;
StgProperty parentProperty;
ULONG foundPropertyIndexToDelete;
ULONG typeOfRelation;
ULONG parentPropertyId;
/*
* Perform a sanity check on the parameters.
*/
if (pwcsName==NULL)
return STG_E_INVALIDPOINTER;
/*
* Create a property enumeration to search the property with the given name
*/
propertyEnumeration = IEnumSTATSTGImpl_Construct(
This->ancestorStorage,
This->rootPropertySetIndex);
foundPropertyIndexToDelete = IEnumSTATSTGImpl_FindProperty(
propertyEnumeration,
pwcsName,
&propertyToDelete);
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
if ( foundPropertyIndexToDelete == PROPERTY_NULL )
{
return STG_E_FILENOTFOUND;
}
/*
* Find the parent property of the property to delete (the one that
* link to it). If This->dirProperty == foundPropertyIndexToDelete,
* the parent is This. Otherwise, the parent is one of it's sibling...
*/
/*
* First, read This's StgProperty..
*/
res = Storage32Impl_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(
Storage32Impl *parentStorage,
OLECHAR32 *propertyToDeleteName)
{
IEnumSTATSTG *elements = 0;
IStorage32 *childStorage = 0;
STATSTG currentElement;
HRESULT hr;
HRESULT destroyHr = S_OK;
/*
* Open the storage and enumerate it
*/
hr = Storage32BaseImpl_OpenStorage(
(Storage32BaseImpl*)parentStorage,
propertyToDeleteName,
0,
STGM_SHARE_EXCLUSIVE,
0,
0,
&childStorage);
if (hr != S_OK)
{
return hr;
}
/*
* Enumerate the elements
*/
IStorage32_EnumElements( childStorage, 0, 0, 0, &elements);
do
{
/*
* Obtain the next element
*/
hr = IEnumSTATSTG_Next(elements, 1, &currentElement, NULL);
if (hr==S_OK)
{
destroyHr = Storage32Impl_DestroyElement(
(Storage32Impl*)childStorage,
(OLECHAR32*)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));
IStorage32_Release(childStorage);
IEnumSTATSTG_Release(elements);
return destroyHr;
}
/*********************************************************************
*
* Internal Method
*
* Perform the deletion of a stream node
*
*/
static HRESULT deleteStreamProperty(
Storage32Impl *parentStorage,
ULONG indexOfPropertyToDelete,
StgProperty propertyToDelete)
{
IStream32 *pis;
HRESULT hr;
ULARGE_INTEGER size;
size.HighPart = 0;
size.LowPart = 0;
hr = Storage32BaseImpl_OpenStream(
(Storage32BaseImpl*)parentStorage,
(OLECHAR32*)propertyToDelete.name,
NULL,
0,
0,
&pis);
if (hr!=S_OK)
{
return(hr);
}
/*
* Zap the stream
*/
hr = IStream32_SetSize(pis, size);
if(hr != S_OK)
{
return hr;
}
/*
* Invalidate the property by zeroing it's name member.
*/
propertyToDelete.sizeOfNameString = 0;
/*
* Here we should re-read the property so we get the updated pointer
* but since we are here to zap it, I don't do it...
*/
Storage32Impl_WriteProperty(
parentStorage->ancestorStorage,
indexOfPropertyToDelete,
&propertyToDelete);
return S_OK;
}
/*********************************************************************
*
* Internal Method
*
* Finds a placeholder for the StgProperty within the Storage
*
*/
static HRESULT findPlaceholder(
Storage32Impl *storage,
ULONG propertyIndexToStore,
ULONG storePropertyIndex,
INT32 typeOfRelation)
{
StgProperty storeProperty;
HRESULT hr = S_OK;
BOOL32 res = TRUE;
/*
* Read the storage property
*/
res = Storage32Impl_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 = Storage32Impl_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(
Storage32Impl *This,
StgProperty propertyToDelete,
StgProperty parentProperty,
ULONG parentPropertyId,
INT32 typeOfRelation)
{
ULONG newLinkProperty = PROPERTY_NULL;
BOOL32 needToFindAPlaceholder = FALSE;
ULONG storeNode = PROPERTY_NULL;
ULONG toStoreNode = PROPERTY_NULL;
INT32 relationType = 0;
HRESULT hr = S_OK;
BOOL32 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 = Storage32Impl_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;
}
HRESULT WINAPI Storage32Impl_SetElementTimes(
Storage32Impl *This,
const OLECHAR32 *pwcsName,/* [string][in] */
const FILETIME *pctime, /* [in] */
const FILETIME *patime, /* [in] */
const FILETIME *pmtime) /* [in] */
{
return E_NOTIMPL;
}
HRESULT WINAPI Storage32Impl_SetStateBits(
Storage32Impl *This,
DWORD grfStateBits,/* [in] */
DWORD grfMask) /* [in] */
{
return E_NOTIMPL;
}
HRESULT Storage32Impl_Construct(
Storage32Impl* This,
HANDLE32 hFile,
DWORD openFlags)
{
HRESULT hr = S_OK;
StgProperty currentProperty;
BOOL32 readSucessful;
ULONG currentPropertyIndex;
memset(This, 0, sizeof(Storage32Impl));
/*
* Initialize the virtual fgunction table.
*/
This->lpvtbl = &Storage32Impl_VTable;
This->v_destructor = &Storage32Impl_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, This->bigBlockSize);
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;
Storage32Impl_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 = Storage32Impl_GetBigBlock(This, 0);
memset(bigBlockBuffer, BLOCK_UNUSED, This->bigBlockSize);
StorageUtl_WriteDWord(bigBlockBuffer, 0, BLOCK_SPECIAL);
StorageUtl_WriteDWord(bigBlockBuffer, sizeof(ULONG), BLOCK_END_OF_CHAIN);
Storage32Impl_ReleaseBigBlock(This, bigBlockBuffer);
}
else
{
/*
* Load the header for the file.
*/
Storage32Impl_LoadFileHeader(This);
}
/*
* 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 = (lstrlen32W(rootProp.name)+1) * sizeof(WCHAR);
rootProp.blockType = BIG_BLOCK_TYPE;
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;
Storage32Impl_WriteProperty(This, 0, &rootProp);
}
/*
* Find the ID of the root int he property sets.
*/
currentPropertyIndex = 0;
do
{
readSucessful = Storage32Impl_ReadProperty(
This,
currentPropertyIndex,
&currentProperty);
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 Storage32Impl_Destroy(
Storage32Impl* 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.
*
* TODO: Handle the case when the big block depot becomes bigger
* than COUNT_BBDEPOTINHEADER.
*/
ULONG Storage32Impl_GetNextFreeBigBlock(
Storage32Impl* This)
{
ULONG depotBlockIndexPos;
void *depotBuffer;
ULONG depotBlockOffset;
ULONG blocksPerDepot = This->bigBlockSize / sizeof(ULONG);
ULONG nextBlockIndex = BLOCK_SPECIAL;
int depotIndex = 0;
ULONG blockNoInSequence = 0;
/*
* Scan the entire big block depot until we find a block marked free
*/
while ( (depotIndex < COUNT_BBDEPOTINHEADER) &&
(nextBlockIndex != BLOCK_UNUSED))
{
depotBlockIndexPos = This->bigBlockDepotStart[depotIndex];
if (depotBlockIndexPos == BLOCK_UNUSED)
{
/*
* No more space in the big block depot, we have to enlarge it
*/
depotBlockIndexPos = depotIndex*blocksPerDepot;
depotBuffer = Storage32Impl_GetBigBlock(This, depotBlockIndexPos);
depotBlockOffset = 0;
/* mark this block as being part of the big block depot
*/
StorageUtl_WriteDWord(depotBuffer, depotBlockOffset, BLOCK_SPECIAL);
depotBlockOffset += sizeof(ULONG);
/* initialize blocks as free
*/
while ((depotBlockOffset < blocksPerDepot))
{
StorageUtl_WriteDWord(depotBuffer, depotBlockOffset, BLOCK_UNUSED);
depotBlockOffset += sizeof(ULONG);
}
Storage32Impl_ReleaseBigBlock(This, depotBuffer);
/* Save the information to the file header
*/
This->bigBlockDepotStart[depotIndex] = depotBlockIndexPos;
This->bigBlockDepotCount++;
Storage32Impl_SaveFileHeader(This);
}
depotBuffer = Storage32Impl_GetROBigBlock(This, depotBlockIndexPos);
if (depotBuffer != 0)
{
depotBlockOffset = 0;
while ( ( (depotBlockOffset/sizeof(ULONG) ) < blocksPerDepot) &&
( nextBlockIndex != BLOCK_UNUSED))
{
StorageUtl_ReadDWord(depotBuffer, depotBlockOffset, &nextBlockIndex);
if (nextBlockIndex != BLOCK_UNUSED)
blockNoInSequence++;
depotBlockOffset += sizeof(ULONG);
}
Storage32Impl_ReleaseBigBlock(This, depotBuffer);
}
depotIndex++;
}
return blockNoInSequence;
}
/******************************************************************************
* Storage32Impl_FreeBigBlock
*
* This method will flag the specified block as free in the big block depot.
*/
void Storage32Impl_FreeBigBlock(
Storage32Impl* This,
ULONG blockIndex)
{
Storage32Impl_SetNextBlockInChain(This, blockIndex, BLOCK_UNUSED);
}
/************************************************************************
* 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.
*
* See Windows documentation for more details on IStorage methods.
*/
ULONG Storage32Impl_GetNextBlockInChain(
Storage32Impl* 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);
assert(depotBlockCount < COUNT_BBDEPOTINHEADER);
depotBlockIndexPos = This->bigBlockDepotStart[depotBlockCount];
depotBuffer = Storage32Impl_GetROBigBlock(This, depotBlockIndexPos);
if (depotBuffer!=0)
{
StorageUtl_ReadDWord(depotBuffer, depotBlockOffset, &nextBlockIndex);
Storage32Impl_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 Storage32Impl_SetNextBlockInChain(
Storage32Impl* 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(depotBlockCount < COUNT_BBDEPOTINHEADER);
depotBlockIndexPos = This->bigBlockDepotStart[depotBlockCount];
depotBuffer = Storage32Impl_GetBigBlock(This, depotBlockIndexPos);
if (depotBuffer!=0)
{
StorageUtl_WriteDWord(depotBuffer, depotBlockOffset, nextBlock);
Storage32Impl_ReleaseBigBlock(This, depotBuffer);
}
return;
}
/******************************************************************************
* Storage32Impl_LoadFileHeader
*
* This method will read in the file header, i.e. big block index -1.
*/
HRESULT Storage32Impl_LoadFileHeader(
Storage32Impl* This)
{
HRESULT hr = STG_E_FILENOTFOUND;
void* headerBigBlock = NULL;
int index;
/*
* Get a pointer to the big block of data containing the header.
*/
headerBigBlock = Storage32Impl_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)
{
Storage32Impl_ReleaseBigBlock(This, headerBigBlock);
return STG_E_OLDFORMAT;
}
if (memcmp(headerBigBlock, STORAGE_magic, sizeof(STORAGE_magic))!=0)
{
Storage32Impl_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.
*/
Storage32Impl_ReleaseBigBlock(This, headerBigBlock);
}
return hr;
}
/******************************************************************************
* Storage32Impl_SaveFileHeader
*
* This method will save to the file the header, i.e. big block -1.
*/
void Storage32Impl_SaveFileHeader(
Storage32Impl* This)
{
BYTE headerBigBlock[BIG_BLOCK_SIZE];
int index;
BOOL32 success;
/*
* Get a pointer to the big block of data containing the header.
*/
success = Storage32Impl_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.
*/
Storage32Impl_WriteBigBlock(This, -1, headerBigBlock);
}
/******************************************************************************
* Storage32Impl_ReadProperty
*
* This method will read the specified property from the property chain.
*/
BOOL32 Storage32Impl_ReadProperty(
Storage32Impl* This,
ULONG index,
StgProperty* buffer)
{
BYTE currentProperty[PROPSET_BLOCK_SIZE];
ULARGE_INTEGER offsetInPropSet;
BOOL32 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);
memcpy(&buffer->blockType, currentProperty + OFFSET_PS_BLOCKTYPE, 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
*/
BOOL32 Storage32Impl_WriteProperty(
Storage32Impl* This,
ULONG index,
StgProperty* buffer)
{
BYTE currentProperty[PROPSET_BLOCK_SIZE];
ULARGE_INTEGER offsetInPropSet;
BOOL32 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);
memcpy(currentProperty + OFFSET_PS_BLOCKTYPE, &buffer->blockType, 1);
/*
* Reassign the size in case of mistake....
*/
buffer->sizeOfNameString = (lstrlen32W(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;
}
BOOL32 Storage32Impl_ReadBigBlock(
Storage32Impl* This,
ULONG blockIndex,
void* buffer)
{
void* bigBlockBuffer;
bigBlockBuffer = Storage32Impl_GetROBigBlock(This, blockIndex);
if (bigBlockBuffer!=0)
{
memcpy(buffer, bigBlockBuffer, This->bigBlockSize);
Storage32Impl_ReleaseBigBlock(This, bigBlockBuffer);
return TRUE;
}
return FALSE;
}
BOOL32 Storage32Impl_WriteBigBlock(
Storage32Impl* This,
ULONG blockIndex,
void* buffer)
{
void* bigBlockBuffer;
bigBlockBuffer = Storage32Impl_GetBigBlock(This, blockIndex);
if (bigBlockBuffer!=0)
{
memcpy(bigBlockBuffer, buffer, This->bigBlockSize);
Storage32Impl_ReleaseBigBlock(This, bigBlockBuffer);
return TRUE;
}
return FALSE;
}
void* Storage32Impl_GetROBigBlock(
Storage32Impl* This,
ULONG blockIndex)
{
return BIGBLOCKFILE_GetROBigBlock(This->bigBlockFile, blockIndex);
}
void* Storage32Impl_GetBigBlock(
Storage32Impl* This,
ULONG blockIndex)
{
return BIGBLOCKFILE_GetBigBlock(This->bigBlockFile, blockIndex);
}
void Storage32Impl_ReleaseBigBlock(
Storage32Impl* This,
void* pBigBlock)
{
BIGBLOCKFILE_ReleaseBigBlock(This->bigBlockFile, pBigBlock);
}
/******************************************************************************
** Storage32InternalImpl implementation
*/
Storage32InternalImpl* Storage32InternalImpl_Construct(
Storage32Impl* ancestorStorage,
ULONG rootPropertyIndex)
{
Storage32InternalImpl* newStorage;
/*
* Allocate space for the new storage object
*/
newStorage = HeapAlloc(GetProcessHeap(), 0, sizeof(Storage32InternalImpl));
if (newStorage!=0)
{
memset(newStorage, 0, sizeof(Storage32InternalImpl));
/*
* Initialize the virtual function table.
*/
newStorage->lpvtbl = &Storage32InternalImpl_VTable;
newStorage->v_destructor = &Storage32InternalImpl_Destroy;
/*
* Keep the ancestor storage pointer and nail a reference to it.
*/
newStorage->ancestorStorage = ancestorStorage;
Storage32BaseImpl_AddRef((Storage32BaseImpl*)(newStorage->ancestorStorage));
/*
* Keep the index of the root property set for this storage,
*/
newStorage->rootPropertySetIndex = rootPropertyIndex;
return newStorage;
}
return 0;
}
void Storage32InternalImpl_Destroy(
Storage32InternalImpl* This)
{
HeapFree(GetProcessHeap(), 0, This);
}
/******************************************************************************
**
** Storage32InternalImpl_Commit
**
** The non-root storages cannot be opened in transacted mode thus this function
** does nothing.
*/
HRESULT WINAPI Storage32InternalImpl_Commit(
Storage32InternalImpl* This,
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 Storage32InternalImpl_Revert(
Storage32InternalImpl* This)
{
return S_OK;
}
/******************************************************************************
** IEnumSTATSTGImpl implementation
*/
IEnumSTATSTGImpl* IEnumSTATSTGImpl_Construct(
Storage32Impl* 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;
IStorage32_AddRef(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(newEnumeration);
}
return newEnumeration;
}
void IEnumSTATSTGImpl_Destroy(IEnumSTATSTGImpl* This)
{
IStorage32_Release(This->parentStorage);
HeapFree(GetProcessHeap(), 0, This->stackToVisit);
HeapFree(GetProcessHeap(), 0, This);
}
HRESULT WINAPI IEnumSTATSTGImpl_QueryInterface(
IEnumSTATSTGImpl* This,
REFIID riid,
void** ppvObject)
{
/*
* 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(This);
return S_OK;;
}
ULONG WINAPI IEnumSTATSTGImpl_AddRef(
IEnumSTATSTGImpl* This)
{
This->ref++;
return This->ref;
}
ULONG WINAPI IEnumSTATSTGImpl_Release(
IEnumSTATSTGImpl* This)
{
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(
IEnumSTATSTGImpl* This,
ULONG celt,
STATSTG* rgelt,
ULONG* pceltFetched)
{
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.
*/
Storage32Impl_ReadProperty(This->parentStorage,
currentSearchNode,
&currentProperty);
/*
* Copy the information to the return buffer.
*/
StorageUtl_CopyPropertyToSTATSTG(currentReturnStruct,
&currentProperty,
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(
IEnumSTATSTGImpl* This,
ULONG celt)
{
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.
*/
Storage32Impl_ReadProperty(This->parentStorage,
currentSearchNode,
&currentProperty);
/*
* 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(
IEnumSTATSTGImpl* This)
{
StgProperty rootProperty;
BOOL32 readSucessful;
/*
* Re-initialize the search stack to an empty stack
*/
This->stackSize = 0;
/*
* Read the root property from the storage.
*/
readSucessful = Storage32Impl_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(
IEnumSTATSTGImpl* This,
IEnumSTATSTG** ppenum)
{
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);
/*
* Don't forget to nail down a reference to the clone before
* returning it.
*/
IEnumSTATSTGImpl_AddRef(newClone);
*ppenum = (IEnumSTATSTG*)newClone;
return S_OK;
}
INT32 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.
*/
Storage32Impl_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 OLECHAR32* 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.
*/
Storage32Impl_ReadProperty(This->parentStorage,
currentSearchNode,
currentProperty);
if ( propertyNameCmp(
(OLECHAR32*)currentProperty->name,
(OLECHAR32*)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;
BOOL32 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 = Storage32Impl_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,
BOOL32 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((lstrlen32W(source->name)+1)*sizeof(WCHAR));
lstrcpy32W((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(
Storage32Impl* parentStorage,
ULONG* headOfStreamPlaceHolder,
ULONG propertyIndex)
{
BlockChainStream* newStream;
newStream = HeapAlloc(GetProcessHeap(), 0, sizeof(BlockChainStream));
newStream->parentStorage = parentStorage;
newStream->headOfStreamPlaceHolder = headOfStreamPlaceHolder;
newStream->ownerPropertyIndex = propertyIndex;
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;
BOOL32 readSucessful;
if (This->headOfStreamPlaceHolder != 0)
return *(This->headOfStreamPlaceHolder);
if (This->ownerPropertyIndex != PROPERTY_NULL)
{
readSucessful = Storage32Impl_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 = Storage32Impl_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.
*/
BOOL32 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.
*/
blockIndex = BlockChainStream_GetHeadOfChain(This);
while ( (blockNoInSequence > 0) && (blockIndex != BLOCK_END_OF_CHAIN))
{
blockIndex =
Storage32Impl_GetNextBlockInChain(This->parentStorage, 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 big block.
*/
bytesToReadInBuffer =
MIN(This->parentStorage->bigBlockSize - offsetInBlock, size);
/*
* Copy those bytes to the buffer
*/
bigBlockBuffer =
Storage32Impl_GetROBigBlock(This->parentStorage, blockIndex);
memcpy(bufferWalker, bigBlockBuffer + offsetInBlock, bytesToReadInBuffer);
Storage32Impl_ReleaseBigBlock(This->parentStorage, bigBlockBuffer);
/*
* Step to the next big block.
*/
blockIndex =
Storage32Impl_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.
*/
BOOL32 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.
*/
blockIndex = BlockChainStream_GetHeadOfChain(This);
while ( (blockNoInSequence > 0) && (blockIndex != BLOCK_END_OF_CHAIN))
{
blockIndex =
Storage32Impl_GetNextBlockInChain(This->parentStorage, blockIndex);
blockNoInSequence--;
}
/*
* 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 = Storage32Impl_GetBigBlock(This->parentStorage, blockIndex);
memcpy(bigBlockBuffer + offsetInBlock, bufferWalker, bytesToWrite);
Storage32Impl_ReleaseBigBlock(This->parentStorage, bigBlockBuffer);
/*
* Step to the next big block.
*/
blockIndex =
Storage32Impl_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.
*/
BOOL32 BlockChainStream_Shrink(BlockChainStream* This,
ULARGE_INTEGER newSize)
{
ULONG blockIndex, extraBlock;
ULONG numBlocks;
ULONG count = 1;
/*
* Figure out how many blocks are needed to contain the new size
*/
numBlocks = newSize.LowPart / This->parentStorage->bigBlockSize;
if ((newSize.LowPart % This->parentStorage->bigBlockSize) != 0)
numBlocks++;
blockIndex = BlockChainStream_GetHeadOfChain(This);
/*
* Go to the new end of chain
*/
while (count < numBlocks)
{
blockIndex =
Storage32Impl_GetNextBlockInChain(This->parentStorage, blockIndex);
count++;
}
/* Get the next block before marking the new end */
extraBlock =
Storage32Impl_GetNextBlockInChain(This->parentStorage, blockIndex);
/* Mark the new end of chain */
Storage32Impl_SetNextBlockInChain(
This->parentStorage,
blockIndex,
BLOCK_END_OF_CHAIN);
/*
* Mark the extra blocks as free
*/
while (extraBlock != BLOCK_END_OF_CHAIN)
{
blockIndex =
Storage32Impl_GetNextBlockInChain(This->parentStorage, extraBlock);
Storage32Impl_FreeBigBlock(This->parentStorage, extraBlock);
extraBlock = blockIndex;
}
return TRUE;
}
/******************************************************************************
* BlockChainStream_Enlarge
*
* Grows this chain in the big block depot.
*/
BOOL32 BlockChainStream_Enlarge(BlockChainStream* This,
ULARGE_INTEGER newSize)
{
ULONG blockIndex, currentBlock;
ULONG newNumBlocks;
ULONG oldNumBlocks = 0;
blockIndex = BlockChainStream_GetHeadOfChain(This);
/*
* Empty chain
*/
if (blockIndex == BLOCK_END_OF_CHAIN)
{
StgProperty chainProp;
assert(This->ownerPropertyIndex != PROPERTY_NULL);
Storage32Impl_ReadProperty(
This->parentStorage,
This->ownerPropertyIndex,
&chainProp);
chainProp.startingBlock = Storage32Impl_GetNextFreeBigBlock(
This->parentStorage);
blockIndex = chainProp.startingBlock;
Storage32Impl_SetNextBlockInChain(
This->parentStorage,
blockIndex,
BLOCK_END_OF_CHAIN);
Storage32Impl_WriteProperty(
This->parentStorage,
This->ownerPropertyIndex,
&chainProp);
}
currentBlock = blockIndex;
/*
* 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
*/
while (blockIndex != BLOCK_END_OF_CHAIN)
{
oldNumBlocks++;
currentBlock = blockIndex;
blockIndex =
Storage32Impl_GetNextBlockInChain(This->parentStorage, currentBlock);
}
/*
* Add new blocks to the chain
*/
while (oldNumBlocks < newNumBlocks)
{
blockIndex = Storage32Impl_GetNextFreeBigBlock(This->parentStorage);
Storage32Impl_SetNextBlockInChain(
This->parentStorage,
currentBlock,
blockIndex);
Storage32Impl_SetNextBlockInChain(
This->parentStorage,
blockIndex,
BLOCK_END_OF_CHAIN);
currentBlock = blockIndex;
oldNumBlocks++;
}
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.
*/
BOOL32 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
*/
Storage32Impl_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(
Storage32Impl* 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;
BOOL32 readSucessful;
if (This->ownerPropertyIndex)
{
readSucessful = Storage32Impl_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;
BOOL32 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;
BOOL32 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 =
Storage32Impl_GetNextBlockInChain(This->parentStorage, sbdIndex);
}
newsbdIndex = Storage32Impl_GetNextFreeBigBlock(This->parentStorage);
if (sbdIndex != BLOCK_END_OF_CHAIN)
Storage32Impl_SetNextBlockInChain(
This->parentStorage,
sbdIndex,
newsbdIndex);
Storage32Impl_SetNextBlockInChain(
This->parentStorage,
newsbdIndex,
BLOCK_END_OF_CHAIN);
/*
* Initialize all the small blocks to free
*/
smallBlockDepot =
Storage32Impl_GetBigBlock(This->parentStorage, newsbdIndex);
memset(smallBlockDepot, BLOCK_UNUSED, This->parentStorage->bigBlockSize);
Storage32Impl_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;
Storage32Impl_SaveFileHeader(This->parentStorage);
/*
* And allocate the first big block that will contain small blocks
*/
sbStartIndex =
Storage32Impl_GetNextFreeBigBlock(This->parentStorage);
Storage32Impl_SetNextBlockInChain(
This->parentStorage,
sbStartIndex,
BLOCK_END_OF_CHAIN);
Storage32Impl_ReadProperty(
This->parentStorage,
This->parentStorage->rootPropertySetIndex,
&rootProp);
rootProp.startingBlock = sbStartIndex;
rootProp.size.HighPart = 0;
rootProp.size.LowPart = This->parentStorage->bigBlockSize;
Storage32Impl_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;
Storage32Impl_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);
Storage32Impl_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.
*/
BOOL32 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.
*/
BOOL32 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.
*/
BOOL32 SmallBlockChainStream_Shrink(
SmallBlockChainStream* This,
ULARGE_INTEGER newSize)
{
ULONG blockIndex, extraBlock;
ULONG numBlocks;
ULONG count = 1;
numBlocks = newSize.LowPart / This->parentStorage->smallBlockSize;
if ((newSize.LowPart % This->parentStorage->smallBlockSize) != 0)
numBlocks++;
blockIndex = SmallBlockChainStream_GetHeadOfChain(This);
/*
* Go to the new end of chain
*/
while (count < numBlocks)
{
blockIndex = SmallBlockChainStream_GetNextBlockInChain(This, blockIndex);
count++;
}
/* Get the next block before marking the new end */
extraBlock = SmallBlockChainStream_GetNextBlockInChain(This, blockIndex);
/* Mark the new end of chain */
SmallBlockChainStream_SetNextBlockInChain(
This,
blockIndex,
BLOCK_END_OF_CHAIN);
/*
* Mark the extra blocks as free
*/
while (extraBlock != BLOCK_END_OF_CHAIN)
{
blockIndex = SmallBlockChainStream_GetNextBlockInChain(This, extraBlock);
SmallBlockChainStream_FreeBlock(This, extraBlock);
extraBlock = blockIndex;
}
return TRUE;
}
/******************************************************************************
* SmallBlockChainStream_Enlarge
*
* Grows this chain in the small block depot.
*/
BOOL32 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;
Storage32Impl_ReadProperty(This->parentStorage, This->ownerPropertyIndex,
&chainProp);
chainProp.startingBlock = SmallBlockChainStream_GetNextFreeBlock(This);
Storage32Impl_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.
*/
BOOL32 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
{
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);
SmallBlockChainStream_Enlarge(This, newSize);
}
return TRUE;
}
/******************************************************************************
* SmallBlockChainStream_GetSize
*
* Returns the size of this chain.
*/
ULARGE_INTEGER SmallBlockChainStream_GetSize(SmallBlockChainStream* This)
{
StgProperty chainProperty;
Storage32Impl_ReadProperty(
This->parentStorage,
This->ownerPropertyIndex,
&chainProperty);
return chainProperty.size;
}
/******************************************************************************
* StgCreateDocfile32 [OLE32.144]
* TODO Validate grfMode (STGM)
*/
HRESULT WINAPI StgCreateDocfile32(
LPCOLESTR32 pwcsName,
DWORD grfMode,
DWORD reserved,
IStorage32 **ppstgOpen)
{
Storage32Impl* newStorage = 0;
HANDLE32 hFile = INVALID_HANDLE_VALUE32;
HRESULT hr = S_OK;
if ((ppstgOpen == 0) || (pwcsName == 0))
return STG_E_INVALIDPOINTER;
/*
* Initialize the "out" parameter.
*/
*ppstgOpen = 0;
hFile = CreateFile32W(pwcsName,
GENERIC_READ | GENERIC_WRITE,
0, /*FILE_SHARE_READ,*/
NULL,
CREATE_NEW,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS,
0);
if (hFile == INVALID_HANDLE_VALUE32)
{
return E_FAIL;
}
/*
* Allocate and initialize the new IStorage32object.
*/
newStorage = HeapAlloc(GetProcessHeap(), 0, sizeof(Storage32Impl));
if (newStorage == 0)
return STG_E_INSUFFICIENTMEMORY;
hr = Storage32Impl_Construct(
newStorage,
hFile,
grfMode);
if (FAILED(hr))
return hr;
/*
* Get an "out" pointer for the caller.
*/
hr = Storage32BaseImpl_QueryInterface(
(Storage32BaseImpl*)newStorage,
&IID_IStorage,
(void**)ppstgOpen);
return hr;
}
/******************************************************************************
* StgOpenStorage32 [OLE32.148]
*/
HRESULT WINAPI StgOpenStorage32(
const OLECHAR32 *pwcsName,
IStorage32 *pstgPriority,
DWORD grfMode,
SNB32 snbExclude,
DWORD reserved,
IStorage32 **ppstgOpen)
{
Storage32Impl* newStorage = 0;
HRESULT hr = S_OK;
HANDLE32 hFile = 0;
/*
* Perform a sanity check
*/
if (( pwcsName == 0) || (ppstgOpen == 0) )
return STG_E_INVALIDPOINTER;
/*
* Initialize the "out" parameter.
*/
*ppstgOpen = 0;
hFile = CreateFile32W( pwcsName,
GENERIC_READ | GENERIC_WRITE,
0, /*FILE_SHARE_READ,*/
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS,
0);
if (hFile==INVALID_HANDLE_VALUE32)
{
return E_FAIL;
}
/*
* Allocate and initialize the new IStorage32object.
*/
newStorage = HeapAlloc(GetProcessHeap(), 0, sizeof(Storage32Impl));
if (newStorage == 0)
return STG_E_INSUFFICIENTMEMORY;
hr = Storage32Impl_Construct(
newStorage,
hFile,
grfMode);
if (FAILED(hr))
return hr;
/*
* Get an "out" pointer for the caller.
*/
hr = Storage32BaseImpl_QueryInterface(
(Storage32BaseImpl*)newStorage,
&IID_IStorage,
(void**)ppstgOpen);
return hr;
}
/******************************************************************************
* WriteClassStg32 [OLE32.148]
*
* This method will store the specified CLSID in the specified storage object
*/
HRESULT WINAPI WriteClassStg32(IStorage32* pStg, REFCLSID rclsid)
{
HRESULT hRes;
assert(pStg != 0);
hRes = IStorage32_SetClass(pStg, rclsid);
return hRes;
}
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