offsetof - get offset of structure component from start of structure (BS2000)

Syntax	#include <stddef.h> size_t offsetof(type, component);
Description	offsetof() returns the offset in bytes between the named structure component and thestart of the structure of the specified type. offsetof() is a macro. type is the name of the structure type (label). component is the name of the structure component.
Return val.	Offset of the structure component from the start of the structure in bytes if successful.
Notes	If the specified structure component is a bit field, the behavior is undefined.