mirror of https://github.com/bsnes-emu/bsnes.git
87 lines
3.8 KiB
C++
87 lines
3.8 KiB
C++
#pragma once
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namespace nall {
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template<uint Precision> struct Integer {
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static_assert(Precision >= 1 && Precision <= 64);
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static inline constexpr auto bits() -> uint { return Precision; }
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using stype =
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conditional_t<bits() <= 8, int8_t,
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conditional_t<bits() <= 16, int16_t,
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conditional_t<bits() <= 32, int32_t,
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conditional_t<bits() <= 64, int64_t,
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void>>>>;
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using utype = typename Natural<Precision>::utype;
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static inline constexpr auto mask() -> utype { return ~0ull >> 64 - Precision; }
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static inline constexpr auto sign() -> utype { return 1ull << Precision - 1; }
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inline Integer() : data(0) {}
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template<uint Bits> inline Integer(Integer<Bits> value) { data = cast(value); }
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template<typename T> inline Integer(const T& value) { data = cast(value); }
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explicit inline Integer(const char* value) { data = cast(toInteger(value)); }
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inline operator stype() const { return data; }
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inline auto operator++(int) { auto value = *this; data = cast(data + 1); return value; }
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inline auto operator--(int) { auto value = *this; data = cast(data - 1); return value; }
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inline auto& operator++() { data = cast(data + 1); return *this; }
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inline auto& operator--() { data = cast(data - 1); return *this; }
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template<typename T> inline auto& operator =(const T& value) { data = cast( value); return *this; }
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template<typename T> inline auto& operator *=(const T& value) { data = cast(data * value); return *this; }
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template<typename T> inline auto& operator /=(const T& value) { data = cast(data / value); return *this; }
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template<typename T> inline auto& operator %=(const T& value) { data = cast(data % value); return *this; }
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template<typename T> inline auto& operator +=(const T& value) { data = cast(data + value); return *this; }
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template<typename T> inline auto& operator -=(const T& value) { data = cast(data - value); return *this; }
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template<typename T> inline auto& operator<<=(const T& value) { data = cast(data << value); return *this; }
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template<typename T> inline auto& operator>>=(const T& value) { data = cast(data >> value); return *this; }
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template<typename T> inline auto& operator &=(const T& value) { data = cast(data & value); return *this; }
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template<typename T> inline auto& operator ^=(const T& value) { data = cast(data ^ value); return *this; }
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template<typename T> inline auto& operator |=(const T& value) { data = cast(data | value); return *this; }
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inline auto bit(int index) -> BitRange<Precision> { return {&data, index}; }
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inline auto bit(int index) const -> const BitRange<Precision> { return {&data, index}; }
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inline auto bit(int lo, int hi) -> BitRange<Precision> { return {&data, lo, hi}; }
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inline auto bit(int lo, int hi) const -> const BitRange<Precision> { return {&data, lo, hi}; }
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inline auto byte(int index) -> BitRange<Precision> { return {&data, index * 8 + 0, index * 8 + 7}; }
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inline auto byte(int index) const -> const BitRange<Precision> { return {&data, index * 8 + 0, index * 8 + 7}; }
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inline auto mask(int index) const -> utype {
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return data & 1 << index;
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}
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inline auto mask(int lo, int hi) const -> utype {
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return data & (~0ull >> 64 - (hi - lo + 1) << lo);
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}
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inline auto slice(int index) const { return Natural<>{bit(index)}; }
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inline auto slice(int lo, int hi) const { return Natural<>{bit(lo, hi)}; }
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inline auto clamp(uint bits) -> stype {
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const int64_t b = 1ull << bits - 1;
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const int64_t m = b - 1;
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return data > m ? m : data < -b ? -b : data;
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}
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inline auto clip(uint bits) -> stype {
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const uint64_t b = 1ull << bits - 1;
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const uint64_t m = b * 2 - 1;
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return (data & m ^ b) - b;
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}
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inline auto serialize(serializer& s) { s(data); }
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inline auto natural() const -> Natural<Precision>;
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private:
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inline auto cast(stype value) const -> stype {
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return (value & mask() ^ sign()) - sign();
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}
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stype data;
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};
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}
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