src/first.h

   1 #ifndef LI_FIRST_H
   2 #define LI_FIRST_H
   3
   4 #ifdef HAVE_CONFIG_H
   5 # include "config.h"
   6 #else
   7 # ifndef _GNU_SOURCE
   8 #  define _GNU_SOURCE
   9 # endif
  10 #endif
  11
  12 #ifndef __STDC_WANT_LIB_EXT1__
  13 #define __STDC_WANT_LIB_EXT1__ 1
  14 #endif
  15
  16 #ifdef __COVERITY__
  17 #define _Float128 long double
  18 #define _Float64x long double
  19 #define _Float64  double
  20 #define _Float32x double
  21 #define _Float32  float
  22 #endif
  23
  24
  25 #include <sys/types.h>
  26 #include <stddef.h>
  27
  28 #if defined HAVE_STDINT_H
  29 # include <stdint.h>
  30 #elif defined HAVE_INTTYPES_H
  31 # include <inttypes.h>
  32 #endif
  33
  34
  35 /* solaris and NetBSD 1.3.x again */
  36 #if (!defined(HAVE_STDINT_H)) && (!defined(HAVE_INTTYPES_H)) && (!defined(uint32_t))
  37 # define uint32_t u_int32_t
  38 #endif
  39
  40
  41 #include <limits.h>
  42
  43 #ifndef SIZE_MAX
  44 # ifdef SIZE_T_MAX
  45 #  define SIZE_MAX SIZE_T_MAX
  46 # else
  47 #  define SIZE_MAX (~(size_t)0u)
  48 # endif
  49 #endif
  50
  51 #ifndef SSIZE_MAX
  52 # define SSIZE_MAX ((ssize_t)(SIZE_MAX >> 1))
  53 #endif
  54
  55
  56 #define UNUSED(x) ( (void)(x) )
  57
  58
  59 #ifndef __has_attribute       /* clang */
  60 #define __has_attribute(x) 0
  61 #endif
  62
  63 #ifdef __GNUC__
  64 #ifndef __GNUC_PREREQ
  65 #  ifdef __GNUC_PREREQ__
  66 #    define __GNUC_PREREQ __GNUC_PREREQ__
  67 #  elif defined __GNUC__ && defined __GNUC_MINOR__
  68 #    define __GNUC_PREREQ(maj, min) \
  69        ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
  70 #  else
  71 #    define __GNUC_PREREQ(maj, min) 0
  72 #  endif
  73 #endif
  74 #else
  75 #define __GNUC_PREREQ(maj,min) 0
  76 #endif
  77
  78 #ifndef __attribute_noinline__
  79 #if __has_attribute(noinline) \
  80  || __GNUC_PREREQ(3,1)
  81 #define __attribute_noinline__  __attribute__((__noinline__))
  82 #else
  83 #define __attribute_noinline__
  84 #endif
  85 #endif
  86
  87 #ifndef __attribute_cold__
  88 #if __has_attribute(cold) \
  89  || __GNUC_PREREQ(4,3)
  90 #define __attribute_cold__  __attribute__((__cold__))
  91 #else
  92 #define __attribute_cold__
  93 #endif
  94 #endif
  95
  96 #ifndef __attribute_hot__
  97 #if __has_attribute(hot) \
  98  || __GNUC_PREREQ(4,3)
  99 #define __attribute_hot__  __attribute__((__hot__))
 100 #else
 101 #define __attribute_hot__
 102 #endif
 103 #endif
 104
 105 #ifndef __attribute_noreturn__
 106 #if __has_attribute(noreturn) \
 107  || __GNUC_PREREQ(2,5)
 108 #define __attribute_noreturn__  __attribute__((__noreturn__))
 109 #else
 110 #define __attribute_noreturn__
 111 #endif
 112 #endif
 113
 114 #ifndef __attribute_fallthrough__
 115 #if __has_attribute(fallthrough) \
 116  || __GNUC_PREREQ(7,0)
 117 #define __attribute_fallthrough__  __attribute__((__fallthrough__));
 118 #else
 119 #define __attribute_fallthrough__  /* fall through */
 120 #endif
 121 #endif
 122
 123 #ifndef __attribute_format__
 124 #if __has_attribute(format) \
 125  || __GNUC_PREREQ(2,95) /*(maybe earlier gcc, too)*/
 126 #define __attribute_format__(x)  __attribute__((__format__ x))
 127 #else
 128 #define __attribute_format__(x)
 129 #endif
 130 #endif
 131
 132
 133 #endif