NAME

offsetof − offset of structure member

SYNOPSIS

#include <stddef.h>

size_t offsetof(type, member-designator);

MT-LEVEL

MT-Safe

DESCRIPTION

offsetof() is a macro defined in <stddef.h> which expands to an integral constant expression that has type size_t, the value of which is the offset in bytes, to the structure member (designated by member-designator), from the beginning of its structure (designated by type). 

SunOS 5.2  —  Last change: 22 Jan 1993