ulut/ul_utdefs.h

   1 /*******************************************************************
   2   uLan Utilities Library - C library of basic reusable constructions
   3
   4   ul_utdefs.h   - common defines used in uLan utilities library
   5
   6  *******************************************************************/
   7
   8
   9 #ifndef _UL_UTDEFS_H
  10 #define _UL_UTDEFS_H
  11
  12 #ifdef __cplusplus
  13 extern "C" {
  14 #endif
  15
  16 #if defined(_WIN32)&&defined(_MSC_VER)&&!defined(inline)
  17 #define inline _inline
  18 #endif
  19
  20 #ifndef UL_OFFSETOF
  21 /* offset of structure field */
  22 #define UL_OFFSETOF(_type,_member) \
  23                 ((size_t)&(((_type*)0)->_member))
  24 #endif /*UL_OFFSET*/
  25
  26 #ifndef UL_CONTAINEROF
  27 #ifdef  __GNUC__
  28 #define UL_CONTAINEROF(_ptr, _type, _member) ({ \
  29         const typeof( ((_type *)0)->_member ) *__mptr = (_ptr); \
  30         (_type *)( (char *)__mptr - UL_OFFSETOF(_type,_member) );})
  31 #else /*!__GNUC__*/
  32 #define UL_CONTAINEROF(_ptr, _type, _member) \
  33         ((_type *)( (char *)_ptr - UL_OFFSETOF(_type,_member)))
  34 #endif /*__GNUC__*/
  35 #endif /*UL_CONTAINEROF*/
  36
  37 #ifndef UL_NOPSTATEMENT
  38 #define UL_NOPSTATEMENT do { } while(0)
  39 #endif
  40
  41 #ifndef ul_cyclic_gt
  42 #define ul_cyclic_gt(x,y) \
  43         ((sizeof(x)>=sizeof(long long))&&(sizeof(y)>=sizeof(long long))? \
  44                 (long long)((unsigned long long)(x)-(unsigned long long)(y))>0: \
  45          (sizeof(x)>=sizeof(long))&&(sizeof(y)>=sizeof(long))? \
  46                 (long)((unsigned long)(x)-(unsigned long)(y))>0: \
  47          (sizeof(x)>=sizeof(int))&&(sizeof(y)>=sizeof(int))? \
  48                 (int)((unsigned int)(x)-(unsigned int)(y))>0: \
  49          (sizeof(x)>=sizeof(short))&&(sizeof(y)>=sizeof(short))? \
  50                 (short)((unsigned short)(x)-(unsigned short)(y))>0: \
  51          (signed char)((unsigned char)(x)-(unsigned char)(y))>0 \
  52         )
  53 #endif /*ul_cyclic_gt*/
  54
  55 #ifndef ul_cyclic_ge
  56 #define ul_cyclic_ge(x,y) \
  57         ((sizeof(x)>=sizeof(long long))&&(sizeof(y)>=sizeof(long long))? \
  58                 (long long)((unsigned long long)(x)-(unsigned long long)(y))>=0: \
  59          (sizeof(x)>=sizeof(long))&&(sizeof(y)>=sizeof(long))? \
  60                 (long)((unsigned long)(x)-(unsigned long)(y))>=0: \
  61          (sizeof(x)>=sizeof(int))&&(sizeof(y)>=sizeof(int))? \
  62                 (int)((unsigned int)(x)-(unsigned int)(y))>=0: \
  63          (sizeof(x)>=sizeof(short))&&(sizeof(y)>=sizeof(short))? \
  64                 (short)((unsigned short)(x)-(unsigned short)(y))>=0: \
  65          (signed char)((unsigned char)(x)-(unsigned char)(y))>=0 \
  66         )
  67 #endif /*ul_cyclic_ge*/
  68
  69 /* GNUC neat features */
  70
  71 #ifdef  __GNUC__
  72 #ifndef UL_ATTR_UNUSED
  73 #define UL_ATTR_PRINTF( format_idx, arg_idx )   \
  74   __attribute__((format (printf, format_idx, arg_idx)))
  75 #define UL_ATTR_SCANF( format_idx, arg_idx )    \
  76   __attribute__((format (scanf, format_idx, arg_idx)))
  77 #define UL_ATTR_FORMAT( arg_idx )               \
  78   __attribute__((format_arg (arg_idx)))
  79 #define UL_ATTR_NORETURN                        \
  80   __attribute__((noreturn))
  81 #define UL_ATTR_CONST                           \
  82   __attribute__((const))
  83 #define UL_ATTR_UNUSED                          \
  84   __attribute__((unused))
  85 #define UL_ATTR_CONSTRUCTOR                     \
  86   __attribute__((constructor))
  87 #define UL_ATTR_DESCRUCTOR                      \
  88   __attribute__((destructor))
  89 #define UL_ATTR_ALWAYS_INLINE                   \
  90   __attribute__((always_inline))
  91 #define UL_ATTR_WEAK                            \
  92   __attribute__((weak))
  93 #endif  /*UL_ATTR_UNUSED*/
  94 #else   /* !__GNUC__ */
  95 #ifndef UL_ATTR_UNUSED
  96 #define UL_ATTR_PRINTF( format_idx, arg_idx )
  97 #define UL_ATTR_SCANF( format_idx, arg_idx )
  98 #define UL_ATTR_FORMAT( arg_idx )
  99 #define UL_ATTR_NORETURN
 100 #define UL_ATTR_CONST
 101 #define UL_ATTR_UNUSED
 102 #define UL_ATTR_CONSTRUCTOR
 103 #define UL_ATTR_DESCRUCTOR
 104 #define UL_ATTR_ALWAYS_INLINE
 105 #define UL_ATTR_WEAK
 106 #endif  /*UL_ATTR_UNUSED*/
 107 #endif  /* !__GNUC__ */
 108
 109 #ifndef UL_ATTR_REENTRANT
 110 #if (!defined(SDCC) && !defined(__SDCC)) || defined(SDCC_z80) || defined(__SDCC_z80)
 111   #define UL_ATTR_REENTRANT
 112 #else
 113   #define UL_ATTR_REENTRANT __reentrant
 114 #endif
 115 #endif /*UL_ATTR_REENTRANT*/
 116
 117 #ifdef __cplusplus
 118 } /* extern "C"*/
 119 #endif
 120
 121 #endif /* _UL_UTDEFS_H */