You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
532 lines
16 KiB
532 lines
16 KiB
// --------------------------------------------------------------------------
|
|
// Module Name: DynamicArray.cpp
|
|
//
|
|
// Copyright (c) 1999-2000, Microsoft Corporation
|
|
//
|
|
// This file contains related classes to manage dynamic arrays. The array is
|
|
// grown as required but never shrunk. The base class handles struct arrays.
|
|
// Subclasses handle special cases of these arrays (such as pointer or
|
|
// CCountedObject arrays).
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// 2000-02-01 vtan moved from Neptune to Whistler
|
|
// --------------------------------------------------------------------------
|
|
|
|
#include "StandardHeader.h"
|
|
#include "DynamicArray.h"
|
|
|
|
#include "CountedObject.h"
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicArray::CDynamicArray
|
|
//
|
|
// Arguments: iElementSize = Size of each array element.
|
|
//
|
|
// Returns: <none>
|
|
//
|
|
// Purpose: Constructor for CDynamicArray. Stores the element size and
|
|
// initializes the memory used to NULL.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
CDynamicArray::CDynamicArray (int iElementSize) :
|
|
_iElementSize(iElementSize),
|
|
_iArraySize(0),
|
|
_pvArray(NULL)
|
|
|
|
{
|
|
ASSERTMSG(iElementSize > 0, "Cannot have negative or zero length element size in CDynamicArray::CDynamicArray");
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicArray::~CDynamicArray
|
|
//
|
|
// Arguments: <none>
|
|
//
|
|
// Returns: <none>
|
|
//
|
|
// Purpose: Destructor for CDynamicArray. Frees the memory used by the
|
|
// array.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
CDynamicArray::~CDynamicArray (void)
|
|
|
|
{
|
|
ReleaseMemory(_pvArray);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicArray::Add
|
|
//
|
|
// Arguments: pvData = Pointer to the data to copy to the array.
|
|
//
|
|
// Returns: NTSTATUS
|
|
//
|
|
// Purpose: Allocates memory for the element to be added to the array. If
|
|
// there is no memory block it allocates an initial block. If
|
|
// there isn't enough memory in the block to hold the next
|
|
// element then it allocates a new larger block.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
NTSTATUS CDynamicArray::Add (const void *pvData)
|
|
|
|
{
|
|
NTSTATUS status;
|
|
|
|
static const int DEFAULT_ELEMENTS_PER_ALLOCATE = 16;
|
|
|
|
status = STATUS_NO_MEMORY;
|
|
|
|
// If no array exists then allocate the first
|
|
// block of memory for this array.
|
|
|
|
if (_pvArray == NULL)
|
|
{
|
|
_iArraySize = 0;
|
|
_iArrayAllocatedSize = DEFAULT_ELEMENTS_PER_ALLOCATE;
|
|
_pvArray = LocalAlloc(LPTR, _iElementSize * _iArrayAllocatedSize);
|
|
}
|
|
|
|
// If the array exists but the limit of the allocated size has
|
|
// been reached then allocate a new block, copy the current
|
|
// block contents and fall thru.
|
|
|
|
if (_pvArray != NULL)
|
|
{
|
|
if (_iArraySize == _iArrayAllocatedSize)
|
|
{
|
|
void *pvNewArray;
|
|
|
|
pvNewArray = LocalAlloc(LPTR, _iElementSize * (_iArrayAllocatedSize + DEFAULT_ELEMENTS_PER_ALLOCATE));
|
|
if (pvNewArray != NULL)
|
|
{
|
|
_iArrayAllocatedSize += DEFAULT_ELEMENTS_PER_ALLOCATE;
|
|
CopyMemory(pvNewArray, _pvArray, _iElementSize * _iArraySize);
|
|
(HLOCAL)LocalFree(_pvArray);
|
|
_pvArray = pvNewArray;
|
|
}
|
|
}
|
|
|
|
// Otherwise there is a spare slot in the array. Copy the
|
|
// data to the array. Increment the array size.
|
|
|
|
if (_iArraySize < _iArrayAllocatedSize)
|
|
{
|
|
CopyMemory(static_cast<char*>(_pvArray) + (_iElementSize * _iArraySize), pvData, _iElementSize);
|
|
++_iArraySize;
|
|
status = STATUS_SUCCESS;
|
|
}
|
|
}
|
|
return(status);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicArray::Remove
|
|
//
|
|
// Arguments: iElementIndex = Index of the element to remove.
|
|
//
|
|
// Returns: NTSTATUS
|
|
//
|
|
// Purpose: Removes the element from the array. Slides down all the
|
|
// members but does not reduce the size of the memory block used
|
|
// by the array.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
NTSTATUS CDynamicArray::Remove (int iElementIndex)
|
|
|
|
{
|
|
NTSTATUS status;
|
|
|
|
status = STATUS_SUCCESS;
|
|
if (_pvArray != NULL)
|
|
{
|
|
|
|
// Make sure the index is valid.
|
|
|
|
if (iElementIndex < _iArraySize)
|
|
{
|
|
int iMoveSize;
|
|
|
|
// Determine the amount of bytes to move when deleting this
|
|
// element and move the memory. Don't resize the array when
|
|
// shrinking. Just leave it alone.
|
|
|
|
iMoveSize = _iElementSize * (_iArraySize - iElementIndex - 1);
|
|
ASSERTMSG(iMoveSize >= 0, "Negative move memory size in CDynamicArray::Remove");
|
|
if (iMoveSize > 0)
|
|
{
|
|
MoveMemory(static_cast<char*>(_pvArray) + (_iElementSize * iElementIndex), static_cast<char*>(_pvArray) + (_iElementSize * (iElementIndex + 1)), iMoveSize);
|
|
}
|
|
ZeroMemory(static_cast<char*>(_pvArray) + (_iElementSize * (_iArraySize - 1)), _iElementSize);
|
|
--_iArraySize;
|
|
}
|
|
else
|
|
{
|
|
status = STATUS_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
return(status);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicArray::GetCount
|
|
//
|
|
// Arguments: <none>
|
|
//
|
|
// Returns: int
|
|
//
|
|
// Purpose: Returns the number of elements in the array.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
int CDynamicArray::GetCount (void) const
|
|
|
|
{
|
|
return(_iArraySize);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicArray::Get
|
|
//
|
|
// Arguments: pvData = Pointer to memory to receive element.
|
|
// iElementIndex = Index of element to retrieve in array.
|
|
//
|
|
// Returns: NTSTATUS
|
|
//
|
|
// Purpose: Copies the data for the specified element by index to the
|
|
// block of memory given. No checks for access violations.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
NTSTATUS CDynamicArray::Get (void *pvData, int iElementIndex)
|
|
|
|
{
|
|
NTSTATUS status;
|
|
|
|
if ((_pvArray != NULL) && (iElementIndex < _iArraySize))
|
|
{
|
|
CopyMemory(pvData, static_cast<char*>(_pvArray) + (_iElementSize * iElementIndex), _iElementSize);
|
|
status = STATUS_SUCCESS;
|
|
}
|
|
else
|
|
{
|
|
status = STATUS_INVALID_PARAMETER;
|
|
}
|
|
return(status);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicArray::Set
|
|
//
|
|
// Arguments: pvData = Pointer to memory to receive element.
|
|
// iElementIndex = Index of element to retrieve in array.
|
|
//
|
|
// Returns: NTSTATUS
|
|
//
|
|
// Purpose: Copies the data for the specified element by index from the
|
|
// block of memory given. No checks for access violations.
|
|
//
|
|
// History: 2000-11-11 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
NTSTATUS CDynamicArray::Set (const void* pvData, int iElementIndex)
|
|
|
|
{
|
|
NTSTATUS status;
|
|
|
|
status = STATUS_SUCCESS;
|
|
if (_pvArray != NULL)
|
|
{
|
|
if (iElementIndex < _iArraySize)
|
|
{
|
|
CopyMemory(static_cast<char*>(_pvArray) + (_iElementSize * iElementIndex), pvData, _iElementSize);
|
|
}
|
|
else
|
|
{
|
|
status = STATUS_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
return(status);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicArray::Iterate
|
|
//
|
|
// Arguments: pDynamicArrayCallback = Interface containing callback.
|
|
//
|
|
// Returns: NTSTATUS
|
|
//
|
|
// Purpose: Iterate the elements of the array. Call the callback function
|
|
// specified in the interface and give it a pointer to the
|
|
// element and the index. Adhere to the NTSTATUS returned from
|
|
// the callback and terminate on an unsuccessful result.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
NTSTATUS CDynamicArray::Iterate (CDynamicArrayCallback *pDynamicArrayCallback)
|
|
|
|
{
|
|
NTSTATUS status;
|
|
|
|
status = STATUS_SUCCESS;
|
|
if (_pvArray != NULL)
|
|
{
|
|
int i;
|
|
|
|
for (i = _iArraySize - 1; NT_SUCCESS(status) && (i >= 0); --i)
|
|
{
|
|
status = pDynamicArrayCallback->Callback(static_cast<char*>(_pvArray) + (_iElementSize * i), i);
|
|
}
|
|
}
|
|
return(status);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicPointerArray::CDynamicPointerArray
|
|
//
|
|
// Arguments: <none>
|
|
//
|
|
// Returns: <none>
|
|
//
|
|
// Purpose: Constructor for CDynamicPointerArray. All elements of this
|
|
// class are pointers that are allocated with LocalAlloc.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
CDynamicPointerArray::CDynamicPointerArray (void) :
|
|
CDynamicArray(sizeof(void*))
|
|
|
|
{
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicPointerArray::~CDynamicPointerArray
|
|
//
|
|
// Arguments: <none>
|
|
//
|
|
// Returns: <none>
|
|
//
|
|
// Purpose: Destructor for CDynamicPointerArray. Walk the entire array
|
|
// and free each pointer in the array before allowing the base
|
|
// class destructor to release the memory allocated for the
|
|
// actual array itself.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
CDynamicPointerArray::~CDynamicPointerArray (void)
|
|
|
|
{
|
|
if (_pvArray != NULL)
|
|
{
|
|
int i;
|
|
|
|
for (i = _iArraySize - 1; i >= 0; --i)
|
|
{
|
|
ReleaseMemory(static_cast<void**>(_pvArray)[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicPointerArray::Add
|
|
//
|
|
// Arguments: pvData = Pointer to add to the array.
|
|
//
|
|
// Returns: NTSTATUS
|
|
//
|
|
// Purpose: Add the given pointer to the array. The pointer is passed in
|
|
// to this function not a pointer to the pointer.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
NTSTATUS CDynamicPointerArray::Add (const void *pvData)
|
|
|
|
{
|
|
return(CDynamicArray::Add(&pvData));
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicPointerArray::Remove
|
|
//
|
|
// Arguments: iElementIndex = Index of the element to remove.
|
|
//
|
|
// Returns: NTSTATUS
|
|
//
|
|
// Purpose: Releases the memory occupied by the element and then removes
|
|
// the element from the array.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
NTSTATUS CDynamicPointerArray::Remove (int iElementIndex)
|
|
|
|
{
|
|
if ((_pvArray != NULL) && (iElementIndex < _iArraySize))
|
|
{
|
|
ReleaseMemory(static_cast<void**>(_pvArray)[iElementIndex]);
|
|
}
|
|
return(CDynamicArray::Remove(iElementIndex));
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicPointerArray::Get
|
|
//
|
|
// Arguments: iElementIndex = Index of the element to get.
|
|
//
|
|
// Returns: void*
|
|
//
|
|
// Purpose: Returns the address of the given element in the array. This
|
|
// applies only to pointer arrays.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
void* CDynamicPointerArray::Get (int iElementIndex)
|
|
|
|
{
|
|
void* pvData;
|
|
|
|
if (!NT_SUCCESS(CDynamicArray::Get(&pvData, iElementIndex)))
|
|
{
|
|
pvData = NULL;
|
|
}
|
|
return(pvData);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicCountedObjectArray::CDynamicCountedObjectArray
|
|
//
|
|
// Arguments: <none>
|
|
//
|
|
// Returns: <none>
|
|
//
|
|
// Purpose: Constructor for the CDynamicCountedObjectArray. All elements
|
|
// should be a subclass of CCountedObject in some way.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
CDynamicCountedObjectArray::CDynamicCountedObjectArray (void) :
|
|
CDynamicArray(sizeof(CCountedObject*))
|
|
|
|
{
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicCountedObjectArray::~CDynamicCountedObjectArray
|
|
//
|
|
// Arguments: <none>
|
|
//
|
|
// Returns: <none>
|
|
//
|
|
// Purpose: Destructor for CDynamicCountedObjectArray. Walk the entire
|
|
// array and release each CCountedObject in the array before
|
|
// allowing the base class destructor to release the memory
|
|
// allocated for the actual array itself.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
CDynamicCountedObjectArray::~CDynamicCountedObjectArray (void)
|
|
|
|
{
|
|
if (_pvArray != NULL)
|
|
{
|
|
int i;
|
|
|
|
for (i = _iArraySize - 1; i >= 0; --i)
|
|
{
|
|
reinterpret_cast<CCountedObject**>(_pvArray)[i]->Release();
|
|
}
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicCountedObjectArray::Add
|
|
//
|
|
// Arguments: pvData = CCountedObject* to add to the array.
|
|
//
|
|
// Returns: NTSTATUS
|
|
//
|
|
// Purpose: Adds the CCountedObject* to the array. Calls
|
|
// CCountedObject::AddRef to incremenet the reference count on
|
|
// the object. If the object cannot be added the reference is
|
|
// released.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
NTSTATUS CDynamicCountedObjectArray::Add (CCountedObject *pvData)
|
|
|
|
{
|
|
NTSTATUS status;
|
|
|
|
pvData->AddRef();
|
|
status = CDynamicArray::Add(&pvData);
|
|
if (!NT_SUCCESS(status))
|
|
{
|
|
pvData->Release();
|
|
}
|
|
return(status);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicCountedObjectArray::Remove
|
|
//
|
|
// Arguments: iElementIndex = Index of the element to remove.
|
|
//
|
|
// Returns: NTSTATUS
|
|
//
|
|
// Purpose: Releases the reference held on the CCountedObject* and then
|
|
// removes the element from the array.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
NTSTATUS CDynamicCountedObjectArray::Remove (int iElementIndex)
|
|
|
|
{
|
|
if ((_pvArray != NULL) && (iElementIndex < _iArraySize))
|
|
{
|
|
reinterpret_cast<CCountedObject**>(_pvArray)[iElementIndex]->Release();
|
|
}
|
|
return(CDynamicArray::Remove(iElementIndex));
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// CDynamicCountedObjectArray::Get
|
|
//
|
|
// Arguments: iElementIndex = Index of the element to get.
|
|
//
|
|
// Returns: CCountedObject*
|
|
//
|
|
// Purpose: Returns the address of the given element in the array. This
|
|
// applies only to CCountedObject* arrays. This does NOT call
|
|
// CCountedObject::AddRef on the returned pointer.
|
|
//
|
|
// History: 1999-11-16 vtan created
|
|
// --------------------------------------------------------------------------
|
|
|
|
CCountedObject* CDynamicCountedObjectArray::Get (int iElementIndex)
|
|
|
|
{
|
|
CCountedObject* pObject;
|
|
|
|
pObject = NULL;
|
|
(NTSTATUS)CDynamicArray::Get(&pObject, iElementIndex);
|
|
return(pObject);
|
|
}
|
|
|