OFFSETOF(3) BSD Library Functions Manual OFFSETOF(3)
NAME
offsetof -- offset of a structure member
SYNOPSIS
#include <stddef.h>
size_t
offsetof(type, member);
DESCRIPTION
The offsetof() macro expands to an integer constant expression of type size_t and yields the offset, in bytes, of the field member from the
start of the structure type.
A compiler error will result if member is not aligned to a byte boundary (i.e. it is a bit-field).
STANDARDS
The offsetof() macro conforms to ANSI X3.159-1989 (``ANSI C89'').
BSD
February 18, 2010 BSD
