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Command: offsetof | Section: 3 | Source: FreeBSD | File: offsetof.3.gz
OFFSETOF(3) FreeBSD 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").
FreeBSD 14.1-RELEASE-p8 February 18, 2010 FreeBSD 14.1-RELEASE-p8