wm_userdata.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		: WM_UserData.c
Purpose 	: Implementation of WM_xxxUserData
----------------------------------------------------------------------
*/

#include "WM_Intern.h"
#include <string.h> 		  /* for memcpy, memset */

#if GUI_WINSUPPORT    /* If 0, WM will not generate any code */

/*********************************************************************
*
*   	Static code
*
**********************************************************************
*/
/*********************************************************************
*
*   	_Min
*/
static int Min(int v0, int v1)
{
	return (v0 < v1) ? v0 : v1;
}

/*********************************************************************
*
*   	_CalcNumBytes
*/
static int _CalcNumBytes(WM_HWIN hWin, int NumBytes)
{
	return Min(GUI_ALLOC_GetSize(hWin) - sizeof(WM_Obj), NumBytes);
}

/*********************************************************************
*
*   	Public code
*
**********************************************************************
*/
/*********************************************************************
*
*   	WM_GetUserData
*
*  Purpose
*    Get the User data (extra bytes) associated with a window
*    These bytes have typically been set using WM_SetUserData first.
*    (If not, they are 0)
*  Return value:
*    Number of bytes fetched. (<= SizeofBuffer)
*/
int WM_GetUserData(WM_HWIN hWin, void *pDest, int NumBytes)
{
	if (hWin)
	{
		WM_Obj *pWin;
		NumBytes = _CalcNumBytes(hWin, NumBytes);
		WM_LOCK();
		pWin = WM_H2P(hWin);
		memcpy(pDest, pWin + 1, NumBytes);
		WM_UNLOCK();
	}
	return NumBytes;
}

/*********************************************************************
*
*   	WM_SetUserData
*
*  Purpose
*    Set the User data (extra bytes) associated with a window
*  Return value:
*    Number of bytes fetched. (<= SizeofBuffer)
*/
int WM_SetUserData(WM_HWIN hWin, const void *pSrc, int NumBytes)
{
	if (hWin)
	{
		WM_Obj *pWin;
		NumBytes = _CalcNumBytes(hWin, NumBytes);
		WM_LOCK();
		pWin = WM_H2P(hWin);
		memcpy(pWin + 1, pSrc, NumBytes);
		WM_UNLOCK();
	}
	return NumBytes;
}

#else
void WM_UserData_C(void)
{
} /* avoid empty object files */
#endif

/*************************** End of file ****************************/