Buffer to string

BUFFER_TO_STRING

Type Function	STRING
Input PT	POINTER TO BYTE (address of the Buffer )
SIZE	UINT (size of the buffer)
START	UINT (position from which the String will be from the buffer
	copied)
STOP	UINT (end of Strings in the buffer)
Output	STRING (a string that was copied from the buffer)
The function BUFFER_To_STRING extracts a String from any array of Byte. The String is copied from any position START from the buffer and ends at the STOP position. The first element in the array is at position number 0. When called aPointer to the array and its size in bytes is passed to the function. Under CoDeSys the call reads	BUFFER_TO_STRING (ADR (Array), SIZEOF (ARRAY), START, STOP), ARRAY is the name of the array. ADR() is a standard function which identifies the pointer to the array and SIZEOF() is a standard function, which determines the size of the array. The function returns the string copied from the buffer as STRING. This type of processing arrays is very efficient because no additional memory is required and no surrender values must be copied. Example: BUFFER_TO_STRING(ADR(Array), SIZEOF(ARRAY), START, STOP)