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git.proxmox.com Git - mirror_edk2.git/blob - StdLib/Include/stddef.h
2 Common "Standard" Definitions.
4 The files stddef.h and stdlib.h are "catch all" headers for definitions and declarations
5 that don't fit well in the other headers. There are two separate header files because
6 the contents of <stddef.h> are valid in both freestanding and hosted environment, while the
7 header <stdlib.h> contains elements that are only valid in a hosted environment.
9 This means that the elements in this file may not impose dependencies on headers other than
10 <float.h>, <iso646.h>, <limits.h>, <stdarg.h>, <stdbool.h>, and (of course) <sys/EfiCdefs.h>.
12 Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
13 This program and the accompanying materials are licensed and made available under
14 the terms and conditions of the BSD License that accompanies this distribution.
15 The full text of the license may be found at
16 http://opensource.org/licenses/bsd-license.
18 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
19 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
23 #include <sys/EfiCdefs.h>
25 #ifdef _EFI_PTRDIFF_T_
26 /** ptrdiff_t is the signed integer type of the result of subtracting two pointers. **/
27 typedef _EFI_PTRDIFF_T_
ptrdiff_t;
28 #undef _EFI_PTRDIFF_T_
32 /** size_t is the unsigned integer type of the result of the sizeof operator. **/
33 typedef _EFI_SIZE_T_
size_t;
40 /** wchar_t is an integer type whose range of values can represent distinct
41 codes for all members of the largest extended character set specified among
42 the supported locales. The null character shall have the code value zero.
44 typedef _EFI_WCHAR_T
wchar_t;
51 A macro that expands to a null pointer constant.<BR>
52 NULL is defined in MdePkg/Include/Base.h which is automatically included
53 by the EDK II build tools.
56 /** The offsetof macro determines the offset of the beginning of a structure
57 member from the beginning of the structure.
59 The macro expands to an integer constant expression that has type size_t,
60 the value of which is the offset in bytes, to the structure member (Member),
61 from the beginning of its structure (StrucName).
63 Alliased to OFFSET_OF which is defined in MdePkg/Include/Base.h which is
64 automatically included by the EDK II build tools.
66 #define offsetof(StrucName, Member) OFFSET_OF(StrucName, Member)
68 #endif /* _STDDEF_H */