macro.h

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 #ifndef foomacrohfoo
   4 #define foomacrohfoo
   5
   6 #include <assert.h>
   7 #include <sys/types.h>
   8
   9 #define __printf_attr(a,b) __attribute__ ((format (printf, a, b)))
  10 #define __sentinel __attribute__ ((sentinel))
  11 #define __noreturn __attribute__((noreturn))
  12 #define __unused __attribute__ ((unused))
  13 #define __destructor __attribute__ ((destructor))
  14 #define __pure __attribute__ ((pure))
  15 #define __const __attribute__ ((const))
  16 #define __deprecated __attribute__ ((deprecated))
  17 #define __packed __attribute__ ((packed))
  18 #define __malloc __attribute__ ((malloc))
  19
  20 /* Rounds up */
  21 static inline size_t ALIGN(size_t l) {
  22         return ((l + sizeof(void*) - 1) & ~(sizeof(void*) - 1));
  23 }
  24
  25 #define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
  26
  27 #define MAX(a,b)                                \
  28         __extension__ ({                        \
  29                         typeof(a) _a = (a);     \
  30                         typeof(b) _b = (b);     \
  31                         _a > _b ? _a : _b;      \
  32                 })
  33
  34 #define MIN(a,b)                                \
  35         __extension__ ({                        \
  36                         typeof(a) _a = (a);     \
  37                         typeof(b) _b = (b);     \
  38                         _a < _b ? _a : _b;      \
  39                 })
  40
  41 #define CLAMP(x, low, high)                                             \
  42         __extension__ ({                                                \
  43                         typeof(x) _x = (x);                             \
  44                         typeof(low) _low = (low);                       \
  45                         typeof(high) _high = (high);                    \
  46                         ((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
  47                 })
  48
  49
  50
  51 #define assert_not_reached(t) assert(!(t))
  52
  53 #define assert_se(x) assert(x)
  54
  55 #define assert_cc(expr)                            \
  56         do {                                       \
  57                 switch (0) {                       \
  58                         case 0:                    \
  59                         case !!(expr):             \
  60                                 ;                  \
  61                 }                                  \
  62         } while (false)
  63
  64 #define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
  65 #define UINT_TO_PTR(u) ((void*) ((uintptr_t) (u)))
  66
  67 #define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
  68 #define UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u)))
  69
  70 #define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
  71 #define INT_TO_PTR(u) ((void*) ((intptr_t) (u)))
  72
  73 #define TO_INT32(p) ((int32_t) ((intptr_t) (p)))
  74 #define INT32_TO_PTR(u) ((void*) ((intptr_t) (u)))
  75
  76 #define memzero(x,l) (memset((x), 0, (l)))
  77 #define zero(x) (memzero(&(x), sizeof(x)))
  78
  79 #endif