.NULL - null function.

Usage:

B:
   x = .null(x);

C:
   #equate _null .null
   int _null(int x);

Description:

.NULL does no actual processing. It merely returns its argument. It is intended for use in those situations where you need a function, but the function does not need to do anything. For example,

extrn .wrap, .null;
...
.wrap = .null; /* turn off user wrapup */

The above code changes the user wrap-up function .WRAP into the .NULL function.