diff options
Diffstat (limited to 'common/albyte.h')
| -rw-r--r-- | common/albyte.h | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/common/albyte.h b/common/albyte.h index 40a10d04..b74659ba 100644 --- a/common/albyte.h +++ b/common/albyte.h @@ -59,29 +59,35 @@ inline constexpr al::byte operator~(al::byte b) noexcept template<size_t N> class bitfield { + template<size_t> struct ElemT { }; + template<> struct ElemT<1> { using type = uint8_t; }; + template<> struct ElemT<2> { using type = uint16_t; }; + template<> struct ElemT<3> { using type = uint32_t; }; + template<> struct ElemT<4> { using type = uint32_t; }; + static constexpr size_t bits_per_byte{std::numeric_limits<unsigned char>::digits}; static constexpr size_t NumElems{(N+bits_per_byte-1) / bits_per_byte}; - byte vals[NumElems]{}; + typename ElemT<NumElems>::type vals{}; public: template<size_t b> inline void set() noexcept { static_assert(b < N, "Bit index out of range"); - vals[b/bits_per_byte] |= 1 << (b%bits_per_byte); + vals |= 1 << b; } template<size_t b> inline void unset() noexcept { static_assert(b < N, "Bit index out of range"); - vals[b/bits_per_byte] &= ~(1 << (b%bits_per_byte)); + vals &= ~(1 << b); } template<size_t b> inline bool get() const noexcept { static_assert(b < N, "Bit index out of range"); - return (vals[b/bits_per_byte] & (1 << (b%bits_per_byte))) != byte{}; + return (vals & (1 << b)) != 0; } template<size_t b, size_t ...args, REQUIRES(sizeof...(args) > 0)> |