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author | bunnei <bunneidev@gmail.com> | 2019-03-21 04:44:20 +0100 |
---|---|---|
committer | GitHub <noreply@github.com> | 2019-03-21 04:44:20 +0100 |
commit | 3e930304fe6fb29a2421dd0fdfef6e66ebb213ad (patch) | |
tree | 3298c05a68692803d9124b919f7f3fe284d535c8 /src/common/bit_field.h | |
parent | Merge pull request #2262 from lioncash/enum (diff) | |
parent | Make bitfield assignment operator public (diff) | |
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Diffstat (limited to 'src/common/bit_field.h')
-rw-r--r-- | src/common/bit_field.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/common/bit_field.h b/src/common/bit_field.h index 7433c39ba..8e35c463f 100644 --- a/src/common/bit_field.h +++ b/src/common/bit_field.h @@ -34,6 +34,7 @@ #include <limits> #include <type_traits> #include "common/common_funcs.h" +#include "common/swap.h" /* * Abstract bitfield class @@ -108,7 +109,7 @@ * symptoms. */ #pragma pack(1) -template <std::size_t Position, std::size_t Bits, typename T> +template <std::size_t Position, std::size_t Bits, typename T, typename EndianTag = LETag> struct BitField { private: // UnderlyingType is T for non-enum types and the underlying type of T if @@ -121,7 +122,11 @@ private: // We store the value as the unsigned type to avoid undefined behaviour on value shifting using StorageType = std::make_unsigned_t<UnderlyingType>; + using StorageTypeWithEndian = typename AddEndian<StorageType, EndianTag>::type; + public: + BitField& operator=(const BitField&) = default; + /// Constants to allow limited introspection of fields if needed static constexpr std::size_t position = Position; static constexpr std::size_t bits = Bits; @@ -170,7 +175,7 @@ public: } constexpr FORCE_INLINE void Assign(const T& value) { - storage = (storage & ~mask) | FormatValue(value); + storage = (static_cast<StorageType>(storage) & ~mask) | FormatValue(value); } constexpr T Value() const { @@ -182,7 +187,7 @@ public: } private: - StorageType storage; + StorageTypeWithEndian storage; static_assert(bits + position <= 8 * sizeof(T), "Bitfield out of range"); @@ -193,3 +198,6 @@ private: static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable in a BitField"); }; #pragma pack() + +template <std::size_t Position, std::size_t Bits, typename T> +using BitFieldBE = BitField<Position, Bits, T, BETag>; |