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 #undef NULL
  30 #ifdef __cplusplus
  31 #if __cplusplus >= 201103L
  32 #define NULL nullptr
  33 #else
  34 #undef __null  // VC++ hack.
  35 #define NULL __null
  36 #endif
  37 #else
  38 #define NULL ((void*)0)
  39 #endif
  40
  41 #ifndef _PTRDIFF_T
  42 #define _PTRDIFF_T
  43 typedef __typeof__(((int*)NULL)-((int*)NULL)) ptrdiff_t;
  44 #endif
  45 #ifndef _SIZE_T
  46 #define _SIZE_T
  47 typedef __typeof__(sizeof(int)) size_t;
  48 #endif
  49 #ifndef __cplusplus
  50 #ifndef _WCHAR_T
  51 #define _WCHAR_T
  52 typedef __WCHAR_TYPE__ wchar_t;
  53 #endif
  54 #endif
  55
  56 #ifndef offsetof
  57 #define offsetof(t, d) __builtin_offsetof(t, d)
  58 #endif
  59
  60 #endif /* __STDDEF_H */
  61
  62 /* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use
  63 __WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */
  64 #if defined(__need_wint_t)
  65 #if !defined(_WINT_T)
  66 #define _WINT_T
  67 typedef __WINT_TYPE__ wint_t;
  68 #endif /* _WINT_T */
  69 #undef __need_wint_t
  70 #endif /* __need_wint_t */