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ole32: Don't use IEnumSTATSTG to search for elements of storages. 

We use it to do a linear search of a binary tree, which is overkill.
Replace it with a simple binary search.
This commit is contained in:
Vincent Povirk 2009-10-23 13:57:42 -05:00 committed by Alexandre Julliard
parent dce1ec06c8
commit ee6856d874
1 changed files with 68 additions and 113 deletions
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181
dlls/ole32/storage32.c
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@ -198,6 +198,11 @@ static LONG propertyNameCmp(
const OLECHAR *newProperty,
const OLECHAR *currentProperty);
static ULONG findElement(
StorageImpl *storage,
ULONG storageEntry,
const OLECHAR *name,
StgProperty *data);
/***********************************************************************
* Declaration of miscellaneous functions...
@ -244,8 +249,6 @@ static IEnumSTATSTGImpl* IEnumSTATSTGImpl_Construct(StorageImpl* This, ULONG fir
static void IEnumSTATSTGImpl_Destroy(IEnumSTATSTGImpl* This);
static void IEnumSTATSTGImpl_PushSearchNode(IEnumSTATSTGImpl* This, ULONG nodeToPush);
static ULONG IEnumSTATSTGImpl_PopSearchNode(IEnumSTATSTGImpl* This, BOOL remove);
static ULONG IEnumSTATSTGImpl_FindProperty(IEnumSTATSTGImpl* This, const OLECHAR* lpszPropName,
StgProperty* buffer);
static INT IEnumSTATSTGImpl_FindParentProperty(IEnumSTATSTGImpl *This, ULONG childProperty,
StgProperty *currentProperty, ULONG *propertyId);
@ -387,7 +390,6 @@ static HRESULT WINAPI StorageBaseImpl_OpenStream(
IStream** ppstm) /* [out] */
{
StorageBaseImpl *This = (StorageBaseImpl *)iface;
IEnumSTATSTGImpl* propertyEnumeration;
StgStreamImpl* newStream;
StgProperty currentProperty;
ULONG foundPropertyIndex;
@ -433,25 +435,14 @@ static HRESULT WINAPI StorageBaseImpl_OpenStream(
}
/*
* Create a property enumeration to search the properties
* Search for the element with the given name
*/
propertyEnumeration = IEnumSTATSTGImpl_Construct(
foundPropertyIndex = findElement(
This->ancestorStorage,
This->rootPropertySetIndex);
/*
* Search the enumeration for the property with the given name
*/
foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(
propertyEnumeration,
This->rootPropertySetIndex,
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.
*/
@ -502,7 +493,6 @@ static HRESULT WINAPI StorageBaseImpl_OpenStorage(
{
StorageBaseImpl *This = (StorageBaseImpl *)iface;
StorageInternalImpl* newStorage;
IEnumSTATSTGImpl* propertyEnumeration;
StgProperty currentProperty;
ULONG foundPropertyIndex;
HRESULT res = STG_E_UNKNOWN;
@ -555,17 +545,12 @@ static HRESULT WINAPI StorageBaseImpl_OpenStorage(
*ppstg = NULL;
propertyEnumeration = IEnumSTATSTGImpl_Construct(
This->ancestorStorage,
This->rootPropertySetIndex);
foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(
propertyEnumeration,
foundPropertyIndex = findElement(
This->ancestorStorage,
This->rootPropertySetIndex,
pwcsName,
&currentProperty);
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
if ( (foundPropertyIndex!=PROPERTY_NULL) &&
(currentProperty.propertyType==PROPTYPE_STORAGE) )
{
@ -708,39 +693,32 @@ static HRESULT WINAPI StorageBaseImpl_RenameElement(
const OLECHAR* pwcsNewName) /* [in] */
{
StorageBaseImpl *This = (StorageBaseImpl *)iface;
IEnumSTATSTGImpl* propertyEnumeration;
StgProperty currentProperty;
ULONG foundPropertyIndex;
TRACE("(%p, %s, %s)\n",
iface, debugstr_w(pwcsOldName), debugstr_w(pwcsNewName));
propertyEnumeration = IEnumSTATSTGImpl_Construct(This->ancestorStorage,
This->rootPropertySetIndex);
foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(propertyEnumeration,
pwcsNewName,
&currentProperty);
foundPropertyIndex = findElement(This->ancestorStorage,
This->rootPropertySetIndex,
pwcsNewName,
&currentProperty);
if (foundPropertyIndex != PROPERTY_NULL)
{
/*
* There is already a property with the new name
*/
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
return STG_E_FILEALREADYEXISTS;
}
IEnumSTATSTG_Reset((IEnumSTATSTG*)propertyEnumeration);
/*
* Search the enumeration for the old property name
* Search for the old element name
*/
foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(propertyEnumeration,
pwcsOldName,
&currentProperty);
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
foundPropertyIndex = findElement(This->ancestorStorage,
This->rootPropertySetIndex,
pwcsOldName,
&currentProperty);
if (foundPropertyIndex != PROPERTY_NULL)
{
@ -855,7 +833,6 @@ static HRESULT WINAPI StorageBaseImpl_CreateStream(
IStream** ppstm) /* [out] */
{
StorageBaseImpl *This = (StorageBaseImpl *)iface;
IEnumSTATSTGImpl* propertyEnumeration;
StgStreamImpl* newStream;
StgProperty currentProperty, newStreamProperty;
ULONG foundPropertyIndex, newPropertyIndex;
@ -904,14 +881,10 @@ static HRESULT WINAPI StorageBaseImpl_CreateStream(
*ppstm = 0;
propertyEnumeration = IEnumSTATSTGImpl_Construct(This->ancestorStorage,
This->rootPropertySetIndex);
foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(propertyEnumeration,
pwcsName,
&currentProperty);
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
foundPropertyIndex = findElement(This->ancestorStorage,
This->rootPropertySetIndex,
pwcsName,
&currentProperty);
if (foundPropertyIndex != PROPERTY_NULL)
{
@ -1068,7 +1041,6 @@ static HRESULT WINAPI StorageImpl_CreateStorage(
{
StorageImpl* const This=(StorageImpl*)iface;
IEnumSTATSTGImpl *propertyEnumeration;
StgProperty currentProperty;
StgProperty newProperty;
ULONG foundPropertyIndex;
@ -1103,16 +1075,10 @@ static HRESULT WINAPI StorageImpl_CreateStorage(
return STG_E_ACCESSDENIED;
}
/*
* Create a property enumeration and search the properties
*/
propertyEnumeration = IEnumSTATSTGImpl_Construct( This->base.ancestorStorage,
This->base.rootPropertySetIndex);
foundPropertyIndex = IEnumSTATSTGImpl_FindProperty(propertyEnumeration,
pwcsName,
&currentProperty);
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
foundPropertyIndex = findElement(This->base.ancestorStorage,
This->base.rootPropertySetIndex,
pwcsName,
&currentProperty);
if (foundPropertyIndex != PROPERTY_NULL)
{
@ -1440,6 +1406,44 @@ static void updatePropertyChain(
}
}
/****************************************************************************
*
* Internal Method
*
* Find and read the element of a storage with the given name.
*/
static ULONG findElement(StorageImpl *storage, ULONG storageEntry,
const OLECHAR *name, StgProperty *data)
{
ULONG currentEntry;
/* Read the storage entry to find the root of the tree. */
StorageImpl_ReadProperty(storage, storageEntry, data);
currentEntry = data->dirProperty;
while (currentEntry != PROPERTY_NULL)
{
LONG cmp;
StorageImpl_ReadProperty(storage, currentEntry, data);
cmp = propertyNameCmp(name, data->name);
if (cmp == 0)
/* found it */
break;
else if (cmp < 0)
currentEntry = data->leftChild;
else if (cmp > 0)
currentEntry = data->rightChild;
}
return currentEntry;
}
/*************************************************************************
* CopyTo (IStorage)
@ -1697,7 +1701,6 @@ static HRESULT WINAPI StorageImpl_DestroyElement(
{
StorageImpl* const This=(StorageImpl*)iface;
IEnumSTATSTGImpl* propertyEnumeration;
HRESULT hr = S_OK;
BOOL res;
StgProperty propertyToDelete;
@ -1715,17 +1718,12 @@ static HRESULT WINAPI StorageImpl_DestroyElement(
if ( STGM_ACCESS_MODE( This->base.openFlags ) == STGM_READ )
return STG_E_ACCESSDENIED;
propertyEnumeration = IEnumSTATSTGImpl_Construct(
foundPropertyIndexToDelete = findElement(
This->base.ancestorStorage,
This->base.rootPropertySetIndex);
foundPropertyIndexToDelete = IEnumSTATSTGImpl_FindProperty(
propertyEnumeration,
This->base.rootPropertySetIndex,
pwcsName,
&propertyToDelete);
IEnumSTATSTGImpl_Destroy(propertyEnumeration);
if ( foundPropertyIndexToDelete == PROPERTY_NULL )
{
return STG_E_FILENOTFOUND;
@ -3973,49 +3971,6 @@ static INT IEnumSTATSTGImpl_FindParentProperty(
return PROPERTY_NULL;
}
static ULONG IEnumSTATSTGImpl_FindProperty(
IEnumSTATSTGImpl* This,
const OLECHAR* lpszPropName,
StgProperty* currentProperty)
{
ULONG currentSearchNode;
/*
* Start with the node at the top of the stack.
*/
currentSearchNode = IEnumSTATSTGImpl_PopSearchNode(This, FALSE);
while (currentSearchNode!=PROPERTY_NULL)
{
/*
* Remove the top node from the stack
*/
IEnumSTATSTGImpl_PopSearchNode(This, TRUE);
/*
* Read the property from the storage.
*/
StorageImpl_ReadProperty(This->parentStorage,
currentSearchNode,
currentProperty);
if (propertyNameCmp(currentProperty->name, lpszPropName) == 0)
return currentSearchNode;
/*
* Push the next search node in the search stack.
*/
IEnumSTATSTGImpl_PushSearchNode(This, currentProperty->rightChild);
/*
* continue the iteration.
*/
currentSearchNode = IEnumSTATSTGImpl_PopSearchNode(This, FALSE);
}
return PROPERTY_NULL;
}
static void IEnumSTATSTGImpl_PushSearchNode(
IEnumSTATSTGImpl* This,
ULONG nodeToPush)