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a430bdb132
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12139 6f19259b-4bc3-4df7-8a09-765794883524
69 lines
2.7 KiB
C
69 lines
2.7 KiB
C
/** @file
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Common "Standard" Definitions.
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The files stddef.h and stdlib.h are "catch all" headers for definitions and declarations
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that don't fit well in the other headers. There are two separate header files because
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the contents of <stddef.h> are valid in both freestanding and hosted environment, while the
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header <stdlib.h> contains elements that are only valid in a hosted environment.
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This means that the elements in this file may not impose dependencies on headers other than
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<float.h>, <iso646.h>, <limits.h>, <stdarg.h>, <stdbool.h>, and (of course) <sys/EfiCdefs.h>.
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Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef _STDDEF_H
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#define _STDDEF_H
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#include <sys/EfiCdefs.h>
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#ifdef _EFI_PTRDIFF_T_
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/** ptrdiff_t is the signed integer type of the result of subtracting two pointers. **/
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typedef _EFI_PTRDIFF_T_ ptrdiff_t;
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#undef _EFI_PTRDIFF_T_
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#endif
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#ifdef _EFI_SIZE_T_
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/** size_t is the unsigned integer type of the result of the sizeof operator. **/
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typedef _EFI_SIZE_T_ size_t;
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#undef _EFI_SIZE_T_
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#undef _BSD_SIZE_T_
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#endif
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#ifndef __cplusplus
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#ifdef _EFI_WCHAR_T
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/** wchar_t is an integer type whose range of values can represent distinct
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codes for all members of the largest extended character set specified among
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the supported locales. The null character shall have the code value zero.
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**/
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typedef _EFI_WCHAR_T wchar_t;
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#undef _EFI_WCHAR_T
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#undef _BSD_WCHAR_T_
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#endif
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#endif
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/** @def NULL
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A macro that expands to a null pointer constant.<BR>
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NULL is defined in MdePkg/Include/Base.h which is automatically included
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by the EDK II build tools.
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**/
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/** The offsetof macro determines the offset of the beginning of a structure
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member from the beginning of the structure.
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The macro expands to an integer constant expression that has type size_t,
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the value of which is the offset in bytes, to the structure member (Member),
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from the beginning of its structure (StrucName).
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Alliased to OFFSET_OF which is defined in MdePkg/Include/Base.h which is
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automatically included by the EDK II build tools.
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**/
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#define offsetof(StrucName, Member) OFFSET_OF(StrucName, Member)
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#endif /* _STDDEF_H */
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