EXTERNAL_HEADERS/stddef.h

   1 /*===---- stddef.h - Basic type definitions --------------------------------===
   2  *
   3  * Copyright (c) 2008 Eli Friedman
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to deal
   7  * in the Software without restriction, including without limitation the rights
   8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9  * copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21  * THE SOFTWARE.
  22  *
  23  *===-----------------------------------------------------------------------===
  24  */
  25
  26 #ifndef __STDDEF_H
  27 #define __STDDEF_H
  28
  29 #ifndef _PTRDIFF_T
  30 #define _PTRDIFF_T
  31 typedef __typeof__(((int*)0)-((int*)0)) ptrdiff_t;
  32 #endif
  33 #ifndef _SIZE_T
  34 #define _SIZE_T
  35 typedef __typeof__(sizeof(int)) size_t;
  36 #endif
  37 #ifndef __cplusplus
  38 #ifndef _WCHAR_T
  39 #define _WCHAR_T
  40 typedef __WCHAR_TYPE__ wchar_t;
  41 #endif
  42 #endif
  43
  44 #undef NULL
  45 #ifdef __cplusplus
  46 #undef __null  // VC++ hack.
  47 #define NULL __null
  48 #else
  49 #define NULL ((void*)0)
  50 #endif
  51
  52 #define offsetof(t, d) __builtin_offsetof(t, d)
  53
  54 #endif /* __STDDEF_H */
  55
  56 /* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use
  57 __WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */
  58 #if defined(__need_wint_t)
  59 #if !defined(_WINT_T)
  60 #define _WINT_T
  61 typedef __WINT_TYPE__ wint_t;
  62 #endif /* _WINT_T */
  63 #undef __need_wint_t
  64 #endif /* __need_wint_t */