1 /** @file 2 Common "Standard" Definitions. 3 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. 8 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>. 11 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. 17 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. 20 **/ 21 #ifndef _STDDEF_H 22 #define _STDDEF_H 23 #include <sys/EfiCdefs.h> 24 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_ 29 #endif 30 31 #ifdef _EFI_SIZE_T_ 32 /** size_t is the unsigned integer type of the result of the sizeof operator. **/ 33 typedef _EFI_SIZE_T_ size_t; 34 #undef _EFI_SIZE_T_ 35 #undef _BSD_SIZE_T_ 36 #endif 37 38 #ifndef __cplusplus 39 #ifdef _EFI_WCHAR_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. 43 **/ 44 typedef _EFI_WCHAR_T wchar_t; 45 #undef _EFI_WCHAR_T 46 #undef _BSD_WCHAR_T_ 47 #endif 48 #endif 49 50 /** @def NULL 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. 54 **/ 55 56 /** The offsetof macro determines the offset of the beginning of a structure 57 member from the beginning of the structure. 58 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). 62 63 Alliased to OFFSET_OF which is defined in MdePkg/Include/Base.h which is 64 automatically included by the EDK II build tools. 65 **/ 66 #define offsetof(StrucName, Member) OFFSET_OF(StrucName, Member) 67 68 #endif /* _STDDEF_H */ 69
