npv/c_fixing.h

   1 #ifndef NPV_C_FIXING_H
   2 #define NPV_C_FIXING_H
   3 /*
   4  * code protected with a GNU affero GPLv3 license
   5  * copyright (C) 2020 Sylvain BERTRAND
   6  */
   7 #include <stdint.h>
   8 #include <limits.h>
   9 #if __GNUC__ > 4
  10         #include <stdatomic.h>
  11 #endif
  12 #define u8 uint8_t
  13 #define U8_MAX 0xff
  14 #define s8 int8_t
  15 #define u16 uint16_t
  16 #define U16_MAX 0xffff
  17 #define s16 int16_t
  18 #define u32 uint32_t
  19 #define u64 uint64_t
  20 #define U64_MAX 0xffffffffffffffff
  21 #define s64 int64_t
  22 #define S64_MIN 0x8000000000000000
  23 #define S64_MAX 0x7fffffffffffffff
  24 #define s64_abs labs
  25 #define s32 int32_t
  26 #define f32 float
  27 #define f64 double
  28
  29 #if UCHAR_WIDTH == 8
  30         #if __GNUC__ > 4
  31                 #define atomic_u8 atomic_uchar
  32         #else
  33                 #define atomic_u8 u8
  34         #endif
  35 #else
  36         #error "unable to find the right atomic for a 8 bits byte, be sure to have __STDC_WANT_IEC_60559_BFP_EXT__ defined"
  37 #endif
  38 #if SHRT_WIDTH == 16
  39         #if __GNUC__ > 4
  40                 #define atomic_u16 atomic_ushort
  41         #else
  42                 #define atomic_u16 u16
  43         #endif
  44 #else
  45         #error "unable to find the right atomic for an unsigned 16 bits word, be sure to have __STDC_WANT_IEC_60559_BFP_EXT__ defined"
  46 #endif
  47 #if UINT_WIDTH == 32
  48         #if __GNUC__ > 4
  49                 #define atomic_u32 atomic_uint
  50         #else
  51                 #define atomic_u32 u32
  52         #endif
  53 #elif ULONG_WIDTH == 32
  54         #if __GNUC__ > 4
  55                 #define atomic_u32 atomic_ulong
  56         #else
  57                 #define atomic_u32 u32
  58         #endif
  59 #else
  60         #error "unable to select the right atomic for an unsigned 32 bits word, be sure to have __STDC_WANT_IEC_60559_BFP_EXT__ defined"
  61 #endif
  62 #if LONG_WIDTH == 64
  63         #if __GNUC__ > 4
  64                 #define atomic_s64 atomic_long
  65         #else
  66                 #define atomic_s64 s64
  67         #endif
  68 #else
  69         #error "unable to select the right atomic for a 64 bits signed word, be sure to have __STDC_WANT_IEC_60559_BFP_EXT__ defined"
  70 #endif
  71 #if __GNUC__ <= 4
  72         #define atomic_load(x) __atomic_load_n(x,__ATOMIC_SEQ_CST)
  73         #define atomic_store(x,y) __atomic_store_n(x,y,__ATOMIC_SEQ_CST)
  74 #endif
  75
  76 #define loop for(;;)
  77 /*
  78  * we don't know how to handle enum from the C "standard" perspective. this
  79  * is based on empirical conclusions based on gcc.
  80  * this is for compiler constant, not compiler constant _variables_
  81  */
  82 #define constant_u32 enum
  83
  84 #define ARRAY_N(x) (sizeof(x) / sizeof((x)[0]))
  85 #endif