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