diff options
Diffstat (limited to 'src/bit.h')
| -rw-r--r-- | src/bit.h | 43 |
1 files changed, 34 insertions, 9 deletions
@@ -198,15 +198,35 @@ static inline uint8_t bswap_u8(uint8_t n) { return n; } -/** - * Reverse the byte order of an integer. - */ -#define bswap(n) \ - _Generic((n), \ - uint8_t: bswap_u8, \ - uint16_t: bswap_u16, \ - uint32_t: bswap_u32, \ - uint64_t: bswap_u64)(n) +#if UCHAR_WIDTH == 8 +# define bswap_uc bswap_u8 +#endif + +#if USHRT_WIDTH == 16 +# define bswap_us bswap_u16 +#elif USHRT_WIDTH == 32 +# define bswap_us bswap_u32 +#elif USHRT_WIDTH == 64 +# define bswap_us bswap_u64 +#endif + +#if UINT_WIDTH == 16 +# define bswap_ui bswap_u16 +#elif UINT_WIDTH == 32 +# define bswap_ui bswap_u32 +#elif UINT_WIDTH == 64 +# define bswap_ui bswap_u64 +#endif + +#if ULONG_WIDTH == 32 +# define bswap_ul bswap_u32 +#elif ULONG_WIDTH == 64 +# define bswap_ul bswap_u64 +#endif + +#if ULLONG_WIDTH == 64 +# define bswap_ull bswap_u64 +#endif // Define an overload for each unsigned type #define UINT_OVERLOADS(macro) \ @@ -225,6 +245,11 @@ static inline uint8_t bswap_u8(uint8_t n) { unsigned long: name##_ul, \ unsigned long long: name##_ull) +/** + * Reverse the byte order of an integer. + */ +#define bswap(n) UINT_SELECT(n, bswap)(n) + // C23 polyfill: bit utilities #if __STDC_VERSION_STDBIT_H__ >= C23 |