NAME

stddef.h - standard type definitions

 SYNOPSIS

#include <stddef.h>

 DESCRIPTION

The <stddef.h> header defines the following:

NULL

Null pointer constant.

offsetof(type, member-designator)

Integral constant expression of type size_t, the value of which is the offset in bytes to the structure member (member-designator), from the beginning of its structure (type).

The <stddef.h> header defines through typedef:

ptrdiff_t

Signed integral type of the result of subtracting two pointers.

wchar_t

Integral type whose range of values can represent distinct wide-character codes for all members of the largest character set specified among the locales supported by the compilation environment: the null character has the code value 0 and each member of the Portable Character Set has a code value equal to its value when used as the lone character in an integer character constant.

size_t

Unsigned integral type of the result of the sizeof operator.

 APPLICATION USAGE

None.

 FUTURE DIRECTIONS

None.

 SEE ALSO

<wchar.h>, <sys/types.h>.