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wine-wine/dlls/comctl32/dsa.c

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/*
* Dynamic structure array (DSA) implementation
*
* Copyright 1998 Eric Kohl
* 1998 Juergen Schmied <j.schmied@metronet.de>
* 2000 Eric Kohl for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* NOTES
* These functions were involuntarily documented by Microsoft in 2002 as
* the outcome of an anti-trust suit brought by various U.S. governments.
* As a result the specifications on MSDN are inaccurate, incomplete
* and misleading. A much more complete (unofficial) documentation is
* available at:
*
* http://members.ozemail.com.au/~geoffch/samples/win32/shell/comctl32
*/
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "commctrl.h"
#include "comctl32.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(dsa);
struct _DSA
{
INT nItemCount;
LPVOID pData;
INT nMaxCount;
INT nItemSize;
INT nGrow;
};
/**************************************************************************
* DSA_Create [COMCTL32.320]
*
* Creates a dynamic storage array
*
* PARAMS
* nSize [I] size of the array elements
* nGrow [I] number of elements by which the array grows when it is filled
*
* RETURNS
* Success: pointer to an array control structure. Use this like a handle.
* Failure: NULL
*
* NOTES
* The DSA_ functions can be used to create and manipulate arrays of
* fixed-size memory blocks. These arrays can store any kind of data
* (e.g. strings and icons).
*/
HDSA WINAPI DSA_Create (INT nSize, INT nGrow)
{
HDSA hdsa;
TRACE("(size=%d grow=%d)\n", nSize, nGrow);
hdsa = Alloc (sizeof(*hdsa));
if (hdsa)
{
hdsa->nItemCount = 0;
hdsa->pData = NULL;
hdsa->nMaxCount = 0;
hdsa->nItemSize = nSize;
hdsa->nGrow = max(1, nGrow);
}
return hdsa;
}
/**************************************************************************
* DSA_Destroy [COMCTL32.321]
*
* Destroys a dynamic storage array
*
* PARAMS
* hdsa [I] pointer to the array control structure
*
* RETURNS
* Success: TRUE
* Failure: FALSE
*/
BOOL WINAPI DSA_Destroy (HDSA hdsa)
{
TRACE("(%p)\n", hdsa);
if (!hdsa)
return FALSE;
if (hdsa->pData && (!Free (hdsa->pData)))
return FALSE;
return Free (hdsa);
}
/**************************************************************************
* DSA_GetItem [COMCTL32.322]
*
* Copies the specified item into a caller-supplied buffer.
*
* PARAMS
* hdsa [I] pointer to the array control structure
* nIndex [I] number of the Item to get
* pDest [O] destination buffer. Has to be >= dwElementSize.
*
* RETURNS
* Success: TRUE
* Failure: FALSE
*/
BOOL WINAPI DSA_GetItem (HDSA hdsa, INT nIndex, LPVOID pDest)
{
LPVOID pSrc;
TRACE("(%p %d %p)\n", hdsa, nIndex, pDest);
if (!hdsa)
return FALSE;
if ((nIndex < 0) || (nIndex >= hdsa->nItemCount))
return FALSE;
pSrc = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
memmove (pDest, pSrc, hdsa->nItemSize);
return TRUE;
}
/**************************************************************************
* DSA_GetItemPtr [COMCTL32.323]
*
* Retrieves a pointer to the specified item.
*
* PARAMS
* hdsa [I] pointer to the array control structure
* nIndex [I] index of the desired item
*
* RETURNS
* Success: pointer to an item
* Failure: NULL
*/
LPVOID WINAPI DSA_GetItemPtr (HDSA hdsa, INT nIndex)
{
LPVOID pSrc;
TRACE("(%p %d)\n", hdsa, nIndex);
if (!hdsa)
return NULL;
if ((nIndex < 0) || (nIndex >= hdsa->nItemCount))
return NULL;
pSrc = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
TRACE("-- ret=%p\n", pSrc);
return pSrc;
}
/**************************************************************************
* DSA_SetItem [COMCTL32.325]
*
* Sets the contents of an item in the array.
*
* PARAMS
* hdsa [I] pointer to the array control structure
* nIndex [I] index for the item
* pSrc [I] pointer to the new item data
*
* RETURNS
* Success: TRUE
* Failure: FALSE
*/
BOOL WINAPI DSA_SetItem (HDSA hdsa, INT nIndex, LPVOID pSrc)
{
INT nSize, nNewItems;
LPVOID pDest, lpTemp;
TRACE("(%p %d %p)\n", hdsa, nIndex, pSrc);
if ((!hdsa) || nIndex < 0)
return FALSE;
if (hdsa->nItemCount <= nIndex) {
/* within the old array */
if (hdsa->nMaxCount > nIndex) {
/* within the allocated space, set a new boundary */
hdsa->nItemCount = nIndex + 1;
}
else {
/* resize the block of memory */
nNewItems =
hdsa->nGrow * ((((nIndex + 1) - 1) / hdsa->nGrow) + 1);
nSize = hdsa->nItemSize * nNewItems;
lpTemp = ReAlloc (hdsa->pData, nSize);
if (!lpTemp)
return FALSE;
hdsa->nMaxCount = nNewItems;
hdsa->nItemCount = nIndex + 1;
hdsa->pData = lpTemp;
}
}
/* put the new entry in */
pDest = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
TRACE("-- move dest=%p src=%p size=%d\n",
pDest, pSrc, hdsa->nItemSize);
memmove (pDest, pSrc, hdsa->nItemSize);
return TRUE;
}
/**************************************************************************
* DSA_InsertItem [COMCTL32.324]
*
* Inserts an item into the array at the specified index.
*
* PARAMS
* hdsa [I] pointer to the array control structure
* nIndex [I] index for the new item
* pSrc [I] pointer to the element
*
* RETURNS
* Success: position of the new item
* Failure: -1
*/
INT WINAPI DSA_InsertItem (HDSA hdsa, INT nIndex, LPVOID pSrc)
{
INT nNewItems, nSize;
LPVOID lpTemp, lpDest;
TRACE("(%p %d %p)\n", hdsa, nIndex, pSrc);
if ((!hdsa) || nIndex < 0)
return -1;
/* when nIndex >= nItemCount then append */
if (nIndex >= hdsa->nItemCount)
nIndex = hdsa->nItemCount;
/* do we need to resize ? */
if (hdsa->nItemCount >= hdsa->nMaxCount) {
nNewItems = hdsa->nMaxCount + hdsa->nGrow;
nSize = hdsa->nItemSize * nNewItems;
if (nSize / hdsa->nItemSize != nNewItems)
return -1;
lpTemp = ReAlloc (hdsa->pData, nSize);
if (!lpTemp)
return -1;
hdsa->nMaxCount = nNewItems;
hdsa->pData = lpTemp;
}
/* do we need to move elements ? */
if (nIndex < hdsa->nItemCount) {
lpTemp = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
lpDest = (char *) lpTemp + hdsa->nItemSize;
nSize = (hdsa->nItemCount - nIndex) * hdsa->nItemSize;
TRACE("-- move dest=%p src=%p size=%d\n",
lpDest, lpTemp, nSize);
memmove (lpDest, lpTemp, nSize);
}
/* ok, we can put the new Item in */
hdsa->nItemCount++;
lpDest = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
TRACE("-- move dest=%p src=%p size=%d\n",
lpDest, pSrc, hdsa->nItemSize);
memmove (lpDest, pSrc, hdsa->nItemSize);
return nIndex;
}
/**************************************************************************
* DSA_DeleteItem [COMCTL32.326]
*
* Deletes the specified item from the array.
*
* PARAMS
* hdsa [I] pointer to the array control structure
* nIndex [I] index for the element to delete
*
* RETURNS
* Success: number of the deleted element
* Failure: -1
*/
INT WINAPI DSA_DeleteItem (HDSA hdsa, INT nIndex)
{
LPVOID lpDest,lpSrc;
INT nSize;
TRACE("(%p %d)\n", hdsa, nIndex);
if (!hdsa)
return -1;
if (nIndex < 0 || nIndex >= hdsa->nItemCount)
return -1;
/* do we need to move ? */
if (nIndex < hdsa->nItemCount - 1) {
lpDest = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
lpSrc = (char *) lpDest + hdsa->nItemSize;
nSize = hdsa->nItemSize * (hdsa->nItemCount - nIndex - 1);
TRACE("-- move dest=%p src=%p size=%d\n",
lpDest, lpSrc, nSize);
memmove (lpDest, lpSrc, nSize);
}
hdsa->nItemCount--;
/* free memory ? */
if ((hdsa->nMaxCount - hdsa->nItemCount) >= hdsa->nGrow) {
nSize = hdsa->nItemSize * hdsa->nItemCount;
lpDest = ReAlloc (hdsa->pData, nSize);
if (!lpDest)
return -1;
hdsa->nMaxCount = hdsa->nItemCount;
hdsa->pData = lpDest;
}
return nIndex;
}
/**************************************************************************
* DSA_DeleteAllItems [COMCTL32.327]
*
* Removes all items and reinitializes the array.
*
* PARAMS
* hdsa [I] pointer to the array control structure
*
* RETURNS
* Success: TRUE
* Failure: FALSE
*/
BOOL WINAPI DSA_DeleteAllItems (HDSA hdsa)
{
TRACE("(%p)\n", hdsa);
if (!hdsa)
return FALSE;
if (hdsa->pData && (!Free (hdsa->pData)))
return FALSE;
hdsa->nItemCount = 0;
hdsa->pData = NULL;
hdsa->nMaxCount = 0;
return TRUE;
}
/**************************************************************************
* DSA_EnumCallback [COMCTL32.387]
*
* Enumerates all items in a dynamic storage array.
*
* PARAMS
* hdsa [I] handle to the dynamic storage array
* enumProc [I]
* lParam [I]
*
* RETURNS
* none
*/
VOID WINAPI DSA_EnumCallback (HDSA hdsa, PFNDSAENUMCALLBACK enumProc,
LPVOID lParam)
{
INT i;
TRACE("(%p %p %p)\n", hdsa, enumProc, lParam);
if (!hdsa)
return;
if (hdsa->nItemCount <= 0)
return;
for (i = 0; i < hdsa->nItemCount; i++) {
LPVOID lpItem = DSA_GetItemPtr (hdsa, i);
if ((enumProc)(lpItem, lParam) == 0)
return;
}
return;
}
/**************************************************************************
* DSA_DestroyCallback [COMCTL32.388]
*
* Enumerates all items in a dynamic storage array and destroys it.
*
* PARAMS
* hdsa [I] handle to the dynamic storage array
* enumProc [I]
* lParam [I]
*
* RETURNS
* none
*/
void WINAPI DSA_DestroyCallback (HDSA hdsa, PFNDSAENUMCALLBACK enumProc,
LPVOID lParam)
{
TRACE("(%p %p %p)\n", hdsa, enumProc, lParam);
DSA_EnumCallback (hdsa, enumProc, lParam);
DSA_Destroy (hdsa);
}
/**************************************************************************
* DSA_Clone [COMCTL32.@]
*
* Creates a copy of a dsa
*
* PARAMS
* hdsa [I] handle to the dynamic storage array
*
* RETURNS
* Cloned dsa
*/
HDSA WINAPI DSA_Clone(HDSA hdsa)
{
HDSA dest;
INT i;
TRACE("(%p)\n", hdsa);
if (!hdsa)
return NULL;
dest = DSA_Create (hdsa->nItemSize, hdsa->nGrow);
if (!dest)
return NULL;
for (i = 0; i < hdsa->nItemCount; i++) {
void *ptr = DSA_GetItemPtr (hdsa, i);
if (DSA_InsertItem (dest, DA_LAST, ptr) == -1) {
DSA_Destroy (dest);
return NULL;
}
}
return dest;
}
/**************************************************************************
* DSA_GetSize [COMCTL32.@]
*
* Returns allocated memory size for this array
*
* PARAMS
* hdsa [I] handle to the dynamic storage array
*
* RETURNS
* Size
*/
ULONGLONG WINAPI DSA_GetSize(HDSA hdsa)
{
TRACE("(%p)\n", hdsa);
if (!hdsa) return 0;
return sizeof(*hdsa) + (ULONGLONG)hdsa->nMaxCount*hdsa->nItemSize;
}
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