source/libs/zziplib/zziplib-0.13.62/zzip/__hints.h

   1 #ifndef __ZZIP_INTERNAL_HINTS_H
   2 #define __ZZIP_INTERNAL_HINTS_H
   3 #include <zzip/conf.h>
   4
   5 #ifndef ZZIP_GNUC_ATLEAST
   6 # if defined __GNUC__ && defined __GNUC_MINOR__
   7 # define ZZIP_GNUC_ATLEAST(_M_,_N_) \
   8         ((__GNUC__ << 10) + __GNUC_MINOR__ >= ((_M_) << 10) + (_N_))
   9 # elif defined __GNUC__
  10 # define ZZIP_GNUC_ATLEAST(_M_,_N_) \
  11         ((__GNUC__ << 10) >= ((_M_) << 10))
  12 # else
  13 # define ZZIP_GNUC_ATLEAST(_M_, _N_) 0
  14 # endif
  15 #endif
  16
  17 #ifndef ZZIP_GNUC_EXTENSION
  18 # if ZZIP_GNUC_ATLEAST(2,8)
  19 # define ZZIP_GNUC_EXTENSION __extension__
  20 # else
  21 # define ZZIP_GNUC_EXTENSION
  22 # endif
  23 #endif
  24
  25 /* func has no side effects, return value depends only on params and globals */
  26 #ifndef ZZIP_GNUC_PURE
  27 # if ZZIP_GNUC_ATLEAST(2,8)
  28 # define ZZIP_GNUC_PURE __attribute__((__pure__))
  29 # else
  30 # define ZZIP_GNUC_PURE
  31 # endif
  32 #endif
  33
  34 /* func has no side effects, return value depends only on params */
  35 #ifndef ZZIP_GNUC_CONST
  36 # if ZZIP_GNUC_ATLEAST(2,4)
  37 # define ZZIP_GNUC_CONST __attribute__((__const__))
  38 # else
  39 # define ZZIP_GNUC_CONST
  40 # endif
  41 #endif
  42
  43 /* typename / variable / function possibly unused */
  44 #ifndef ZZIP_GNUC_UNUSED
  45 # if ZZIP_GNUC_ATLEAST(2,4)
  46 # define ZZIP_GNUC_UNUSED __attribute__((__unused__))
  47 # else
  48 # define ZZIP_GNUC_UNUSED
  49 # endif
  50 #endif
  51
  52 /* obvious. btw, a noreturn-func should return void */
  53 #ifndef ZZIP_GNUC_NORETURN
  54 # if ZZIP_GNUC_ATLEAST(2,5)
  55 # define ZZIP_GNUC_NORETURN __attribute__((__noreturn__))
  56 # else
  57 # define ZZIP_GNUC_NORETURN
  58 # endif
  59 #endif
  60
  61 /* omit function from profiling with -finstrument-functions */
  62 #ifndef ZZIP_GNUC_NO_INSTRUMENT
  63 # if ZZIP_GNUC_ATLEAST(2,4)
  64 # define ZZIP_GNUC_NO_INSTRUMENT __attribute__((__no_instrument_function__))
  65 # else
  66 # define ZZIP_GNUC_NO_INSTRUMENT
  67 # endif
  68 #endif
  69
  70 /* all pointer args must not be null, and allow optimiztons based on the fact*/
  71 #ifndef ZZIP_GNUC_NONNULL
  72 # if ZZIP_GNUC_ATLEAST(3,1)
  73 # define ZZIP_GNUC_NONNULL __attribute__((nonnull))
  74 # else
  75 # define ZZIP_GNUC_NONNULL
  76 # endif
  77 #endif
  78
  79 /* the function can not throw - the libc function are usually nothrow */
  80 #ifndef ZZIP_GNUC_NOTHROW
  81 # if ZZIP_GNUC_ATLEAST(3,2)
  82 # define ZZIP_GNUC_NOTHROW __attribute__((nothrow))
  83 # else
  84 # define ZZIP_GNUC_NOTHROW
  85 # endif
  86 #endif
  87
  88 /* typename / function / variable is obsolete but still listed in headers */
  89 #ifndef ZZIP_GNUC_DEPRECATED
  90 # if ZZIP_GNUC_ATLEAST(3,1)
  91 # define ZZIP_GNUC_DEPRECATED __attribute__((deprecated))
  92 # else
  93 # define ZZIP_GNUC_DEPRECATED
  94 # endif
  95 #endif
  96
  97 /* resolve references to this function during pre-linking the libary */
  98 #ifndef ZZIP_GNUC_LIB_PROTECTED
  99 # if ZZIP_GNUC_ATLEAST(3,1)
 100 # define ZZIP_GNUC_LIB_PROTECTED __attribute__((visiblity("protected")))
 101 # else
 102 # define ZZIP_GNUC_LIB_PROTECTED
 103 # endif
 104 #endif
 105
 106 /* func shall only be usable within the same lib (so, no entry in lib symtab)*/
 107 #ifndef ZZIP_GNUC_LIB_PRIVATE
 108 # if ZZIP_GNUC_ATLEAST(3,1)
 109 # define ZZIP_GNUC_LIB_PRIVATE __attribute__((visiblity("hidden")))
 110 # else
 111 # define ZZIP_GNUC_LIB_PRIVATE
 112 # endif
 113 #endif
 114
 115 /* ... and not even passed as a function pointer reference to outside the lib*/
 116 #ifndef ZZIP_GNUC_LIB_INTERNAL
 117 # if ZZIP_GNUC_ATLEAST(3,1)
 118 # define ZZIP_GNUC_LIB_INTERNAL __attribute__((visiblity("internal")))
 119 # else
 120 # define ZZIP_GNUC_LIB_INTERNAL
 121 # endif
 122 #endif
 123
 124
 125 #ifndef ZZIP_GNUC_FORMAT
 126 # if ZZIP_GNUC_ATLEAST(2,4)
 127 # define ZZIP_GNUC_FORMAT(_X_) __attribute__((__format_arg__(_X_)))
 128 # else
 129 # define ZZIP_GNUC_FORMAT(_X_)
 130 # endif
 131 #endif
 132
 133 #ifndef ZZIP_GNUC_SCANF
 134 # if ZZIP_GNUC_ATLEAST(2,4)
 135 # define ZZIP_GNUC_SCANF(_S_,_X_) __attribute__((__scanf__(_S_,_X_)))
 136 # else
 137 # define ZZIP_GNUC_SCANF(_S_,_X_)
 138 # endif
 139 #endif
 140
 141 #ifndef ZZIP_GNUC_PRINTF
 142 # if ZZIP_GNUC_ATLEAST(2,4)
 143 # define ZZIP_GNUC_PRINTF(_S_,_X_) __attribute__((__printf__(_S_,_X_)))
 144 # else
 145 # define ZZIP_GNUC_PRINTF(_S_,_X_)
 146 # endif
 147 #endif
 148
 149 #ifdef __GNUC__
 150 #define ZZIP_GNUC_PACKED __attribute__((packed))
 151 #else
 152 #define ZZIP_GNUC_PACKED
 153 #endif
 154
 155 #ifndef ZZIP_FUNCTION
 156 # if ZZIP_GNUC_ATLEAST(2,6)
 157 # define ZZIP_FUNC             __FUNCTION__
 158 # define ZZIP_FUNCTION         __FUNCTION__
 159 # elif  defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
 160 # define ZZIP_FUNC             __func__
 161 # define ZZIP_FUNCTION         ""
 162 # else
 163 # define ZZIP_FUNC             0
 164 # define ZZIP_FUNCTION         ""
 165 # endif
 166 #endif
 167
 168 #ifndef ZZIP_STRING
 169 #define ZZIP_STRING(_X_)   ZZIP_STRING_(_X_)
 170 #define ZZIP_STRING_(_Y_)  #_Y_
 171 #endif
 172
 173 #ifndef ZZIP_DIM
 174 #define ZZIP_DIM(_A_)  (sizeof(_A_) / sizeof ((_A_)[0]))
 175 #endif
 176
 177 #if !(defined ZZIP_FOR1 && defined ZZIP_END1)
 178 # if defined sun || defined __sun__
 179 # define ZZIP_FOR1  if (1)
 180 # define ZZIP_END1  else (void)0
 181 # else
 182 # define ZZIP_FOR1  do
 183 # define ZZIP_END1  while (0)
 184 # endif
 185 #endif
 186
 187 #ifndef ZZIP_BRANCH_OVER
 188 # if ZZIP_GNUC_ATLEAST(2,96)
 189 # define ZZIP_BRANCH_OVER(_X_) __builtin_expect((_X_),0)
 190 # else
 191 # define ZZIP_BRANCH_OVER(_X_) (_X_)
 192 # endif
 193 #endif
 194
 195 #endif