src/cc-compat.h

   1 /*
   2  * Copyright (C) the libgit2 contributors. All rights reserved.
   3  *
   4  * This file is part of libgit2, distributed under the GNU GPL v2 with
   5  * a Linking Exception. For full terms see the included COPYING file.
   6  */
   7 #ifndef INCLUDE_cc_compat_h__
   8 #define INCLUDE_cc_compat_h__
   9
  10 #include <stdarg.h>
  11
  12 /*
  13  * See if our compiler is known to support flexible array members.
  14  */
  15 #ifndef GIT_FLEX_ARRAY
  16 #       if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
  17 #               define GIT_FLEX_ARRAY /* empty */
  18 #       elif defined(__GNUC__)
  19 #               if (__GNUC__ >= 3)
  20 #                       define GIT_FLEX_ARRAY /* empty */
  21 #               else
  22 #                       define GIT_FLEX_ARRAY 0 /* older GNU extension */
  23 #               endif
  24 #       endif
  25
  26 /* Default to safer but a bit wasteful traditional style */
  27 #       ifndef GIT_FLEX_ARRAY
  28 #               define GIT_FLEX_ARRAY 1
  29 #       endif
  30 #endif
  31
  32 #ifdef __GNUC__
  33 #       define GIT_TYPEOF(x) (__typeof__(x))
  34 #else
  35 #       define GIT_TYPEOF(x)
  36 #endif
  37
  38 #if defined(__GNUC__)
  39 #       define GIT_ALIGN(x,size) x __attribute__ ((aligned(size)))
  40 #elif defined(_MSC_VER)
  41 #       define GIT_ALIGN(x,size) __declspec(align(size)) x
  42 #else
  43 #       define GIT_ALIGN(x,size) x
  44 #endif
  45
  46 #define GIT_UNUSED(x) ((void)(x))
  47
  48 /* Define the printf format specifer to use for size_t output */
  49 #if defined(_MSC_VER) || defined(__MINGW32__)
  50 #       define PRIuZ "Iu"
  51 #       define PRIxZ "Ix"
  52 #       define PRIdZ "Id"
  53 #else
  54 #       define PRIuZ "zu"
  55 #       define PRIxZ "zx"
  56 #       define PRIdZ "zd"
  57 #endif
  58
  59 /* Micosoft Visual C/C++ */
  60 #if defined(_MSC_VER)
  61 /* disable "deprecated function" warnings */
  62 #       pragma warning ( disable : 4996 )
  63 /* disable "conditional expression is constant" level 4 warnings */
  64 #       pragma warning ( disable : 4127 )
  65 #endif
  66
  67 #if defined (_MSC_VER)
  68         typedef unsigned char bool;
  69 #       ifndef true
  70 #               define true 1
  71 #       endif
  72 #       ifndef false
  73 #               define false 0
  74 #       endif
  75 #else
  76 #       include <stdbool.h>
  77 #endif
  78
  79 #ifndef va_copy
  80 #       ifdef __va_copy
  81 #               define va_copy(dst, src) __va_copy(dst, src)
  82 #       else
  83 #               define va_copy(dst, src) ((dst) = (src))
  84 #       endif
  85 #endif
  86
  87 #endif