FC_MemorySwap - General Information

Overview

Type:	Function
Available as of:	SystemInterface_1.32.6.0
Versions:	Current version

Task

Swap the elements of a memory area.

Description

With this function, you can swap the elements of a memory area. The elements are inverted byte-by-byte, i. e., the first element is swapped with the last, the second with the second to last, and so on.

Interface

Input	Data type	Description
i_dwAddress	DWORD	Initial address of the memory area
i_diSize	DINT	Not used
i_diCount	DINT	Number of bytes to be swapped

Return Value

Data type	Description
BOOL	TRUE: Return value is always TRUE

Examples

xResult : BOOL;
abyData : ARRAY[1..10] OF BYTE;
pbyAddresse : POINTER TO BYTE;
pbyAddresse := ADR(abyData);
xResult := FC_MemorySwap(pbyAddresse,0,SIZEOF(abyData));

If the array contained the elements [0,1,2,3,4,5,6,7,8,9] before calling up the FC_MemorySwap(), then the array has the following contents after the function call-up: [9,8,7,6.5,4,3,2,1,0].