gui_array_deleteitem.c

MCB2300_ucgui_LCD320240.rar LPC2368的uc/gui的移植

/*
*********************************************************************************************************
*   											 uC/GUI
*   					 Universal graphic software for embedded applications
*
*   					(c) Copyright 2002, Micrium Inc., Weston, FL
*   					(c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*   		   礐/GUI is protected by international copyright laws. Knowledge of the
*   		   source code may not be used to write a similar product. This file may
*   		   only be used in accordance with a license and should not be redistributed
*   		   in any way. We appreciate your understanding and fairness.
*
----------------------------------------------------------------------
File		: GUI_ARRAY_DeleteItem.c
Purpose 	: Array handling routines
---------------------------END-OF-HEADER------------------------------
*/

#include "GUI_ARRAY.h"
#include <string.h>

#if GUI_WINSUPPORT

/*********************************************************************
*
*   	public code
*
**********************************************************************
*/
/*********************************************************************
*
*   	GUI_ARRAY_DeleteItem
*
* Purpose:
*   Eliminate one element in a GUI_ARRAY.
*   This means:
*     - freeing the memory block
*     - moving the last item to the position of the deleted item
*     - possible reducing the size of the memory used for management (opt)
*
*/
void GUI_ARRAY_DeleteItem(GUI_ARRAY *pThis, unsigned int Index)
{
	WM_HMEM ha;
	WM_HMEM* pa;
	int i;
	if (Index < (unsigned) pThis->NumItems)
	{
		ha = pThis->haHandle;
		if (ha)
		{
			int NumItems;
			WM_LOCK();
			pa = (WM_HMEM *) GUI_ALLOC_h2p(ha);
			/* Free the attached item */
			GUI_ALLOC_FreePtr(pa + Index);
			/* Move the last items to the position of the deleted item */
			NumItems = --pThis->NumItems;
			for (i = Index; i <= NumItems - 1; i++)
			{
				*(pa + i) = *(pa + i + 1);
			}
			WM_UNLOCK();
		}
	}
}

#else

void GUI_ARRAY_DeleteItem(void)
{
}

#endif