mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-27 06:12:15 +00:00
196 lines
9.3 KiB
C++
196 lines
9.3 KiB
C++
/*
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#pragma once
|
|
#include <vapours/common.hpp>
|
|
#include <vapours/assert.hpp>
|
|
#include <vapours/util/util_alignment.hpp>
|
|
#include <vapours/util/util_bitutil.hpp>
|
|
|
|
namespace ams::util {
|
|
|
|
namespace impl {
|
|
|
|
template<size_t Count, typename Storage>
|
|
constexpr void NegateImpl(Storage arr[]) {
|
|
for (size_t i = 0; i < Count; i++) {
|
|
arr[i] = ~arr[i];
|
|
}
|
|
}
|
|
|
|
template<size_t Count, typename Storage>
|
|
constexpr void AndImpl(Storage dst[], const Storage src[]) {
|
|
for (size_t i = 0; i < Count; i++) {
|
|
dst[i] &= src[i];
|
|
}
|
|
}
|
|
|
|
template<size_t Count, typename Storage>
|
|
constexpr void OrImpl(Storage dst[], const Storage src[]) {
|
|
for (size_t i = 0; i < Count; i++) {
|
|
dst[i] |= src[i];
|
|
}
|
|
}
|
|
|
|
template<size_t Count, typename Storage>
|
|
constexpr void XorImpl(Storage dst[], const Storage src[]) {
|
|
for (size_t i = 0; i < Count; i++) {
|
|
dst[i] ^= src[i];
|
|
}
|
|
}
|
|
|
|
template<size_t Count, typename Storage>
|
|
constexpr bool IsEqual(const Storage lhs[], const Storage rhs[]) {
|
|
for (size_t i = 0; i < Count; i++) {
|
|
if (lhs[i] != rhs[i]) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
template<size_t Count, typename Storage>
|
|
constexpr bool IsAnySet(const Storage arr[]) {
|
|
for (size_t i = 0; i < Count; i++) {
|
|
if (arr[i]) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
template<size_t Count, typename Storage>
|
|
constexpr int PopCount(const Storage arr[]) {
|
|
int count = 0;
|
|
for (size_t i = 0; i < Count; i++) {
|
|
count += ::ams::util::PopCount(arr[i]);
|
|
}
|
|
return count;
|
|
}
|
|
|
|
}
|
|
|
|
template<size_t N, typename T = void>
|
|
struct BitFlagSet {
|
|
static_assert(N > 0);
|
|
using Storage = typename std::conditional<N <= BITSIZEOF(u32), u32, u64>::type;
|
|
static constexpr size_t StorageBitCount = BITSIZEOF(Storage);
|
|
static constexpr size_t StorageCount = util::AlignUp(N, StorageBitCount) / StorageBitCount;
|
|
Storage _storage[StorageCount];
|
|
private:
|
|
constexpr BitFlagSet<N, T> &SetImpl(s32 idx, Storage mask, bool en) {
|
|
if (en) {
|
|
this->_storage[idx] |= mask;
|
|
} else {
|
|
this->_storage[idx] &= ~mask;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
constexpr bool TestImpl(s32 idx, Storage mask) const { return (this->_storage[idx] & mask) != 0; }
|
|
constexpr void Truncate() { TruncateIf(std::integral_constant<bool, N % StorageBitCount != 0>{}); }
|
|
constexpr void TruncateIf(std::true_type) { this->_storage[StorageCount - 1] &= MakeStorageMask(N) - 1; }
|
|
constexpr void TruncateIf(std::false_type) { /* ... */ }
|
|
|
|
static constexpr s32 GetStorageIndex(s32 idx) { return idx / StorageBitCount; }
|
|
static constexpr Storage MakeStorageMask(s32 idx) { return static_cast<Storage>(1) << (idx % StorageBitCount); }
|
|
public:
|
|
class Reference {
|
|
friend struct BitFlagSet<N, T>;
|
|
private:
|
|
BitFlagSet<N, T> *set;
|
|
s32 idx;
|
|
private:
|
|
constexpr Reference() : set(nullptr), idx(0) { /* ... */ }
|
|
constexpr Reference(BitFlagSet<N, T> &s, s32 i) : set(std::addressof(s)), idx(i) { /* ... */ }
|
|
public:
|
|
constexpr Reference &operator=(bool en) { this->set->Set(this->idx, en); return *this; }
|
|
constexpr Reference &operator=(const Reference &r) { this->set->Set(this->idx, r); return *this; }
|
|
constexpr Reference &Negate() { this->set->Negate(this->idx); return *this; }
|
|
constexpr operator bool() const { return this->set->Test(this->idx); }
|
|
constexpr bool operator~() const { return !this->set->Test(this->idx); }
|
|
};
|
|
|
|
template<s32 _Index>
|
|
struct Flag {
|
|
static_assert(_Index < static_cast<s32>(N));
|
|
friend struct BitFlagSet<N, T>;
|
|
static constexpr s32 Index = _Index;
|
|
static const BitFlagSet<N, T> Mask;
|
|
private:
|
|
static constexpr s32 StorageIndex = Index / StorageBitCount;
|
|
static constexpr Storage StorageMask = static_cast<Storage>(1) << (Index % StorageBitCount);
|
|
|
|
template<size_t StorageCount>
|
|
struct SingleStorageTrait {
|
|
static_assert(StorageCount == 1);
|
|
using Type = Storage;
|
|
};
|
|
};
|
|
|
|
template<typename FlagType>
|
|
constexpr bool Test() const { return this->TestImpl(FlagType::StorageIndex, FlagType::StorageMask); }
|
|
constexpr bool Test(s32 idx) const { return this->TestImpl(GetStorageIndex(idx), MakeStorageMask(idx)); }
|
|
|
|
template<typename FlagType>
|
|
constexpr BitFlagSet<N, T> &Set(bool en = true) { return this->SetImpl(FlagType::StorageIndex, FlagType::StorageMask, en); }
|
|
constexpr BitFlagSet<N, T> &Set(s32 idx, bool en = true) { return this->SetImpl(GetStorageIndex(idx), MakeStorageMask(idx), en); }
|
|
constexpr BitFlagSet<N, T> &Set() { std::memset(this->_storage, ~0, sizeof(this->_storage)); this->Truncate(); return *this; }
|
|
|
|
template<typename FlagType>
|
|
constexpr BitFlagSet<N, T> &Reset() { return this->Set<FlagType>(false); }
|
|
constexpr BitFlagSet<N, T> &Reset(s32 idx) { return this->Set(idx, false); }
|
|
constexpr BitFlagSet<N, T> &Reset() { std::memset(this->_storage, 0, sizeof(this->_storage)); this->Truncate(); return *this; }
|
|
|
|
template<typename FlagType>
|
|
constexpr BitFlagSet<N, T> &Negate() { return this->Set<FlagType>(!this->Test<FlagType>()); }
|
|
constexpr BitFlagSet<N, T> &Negate(s32 idx) { return this->Set(idx, !this->Test(idx)); }
|
|
constexpr BitFlagSet<N, T> &Negate() { ams::util::impl::NegateImpl<StorageCount>(this->_storage); this->Truncate(); return *this; }
|
|
|
|
constexpr int GetCount() const { return static_cast<int>(N); }
|
|
constexpr bool IsAnySet() const { return ams::util::impl::IsAnySet<StorageCount>(this->_storage); }
|
|
constexpr int PopCount() const { return ams::util::impl::PopCount<StorageCount>(this->_storage); }
|
|
constexpr bool IsAllSet() const { return this->PopCount() == this->GetCount(); }
|
|
constexpr bool IsAllOff() const { return !this->IsAnySet(); }
|
|
|
|
constexpr bool operator[](s32 idx) const { return this->Test(idx); }
|
|
constexpr Reference operator[](s32 idx) { return Reference(*this, idx); }
|
|
|
|
constexpr bool operator==(const BitFlagSet<N, T> &rhs) const { return ams::util::impl::IsEqual<StorageCount>(this->_storage, rhs._storage); }
|
|
constexpr bool operator!=(const BitFlagSet<N, T> &rhs) const { return !(*this == rhs); }
|
|
|
|
constexpr BitFlagSet<N, T> operator~() const { BitFlagSet<N, T> tmp = *this; return tmp.Negate(); }
|
|
|
|
constexpr BitFlagSet<N, T> operator&(const BitFlagSet<N, T> &rhs) const { BitFlagSet<N, T> v = *this; v &= rhs; return v; }
|
|
constexpr BitFlagSet<N, T> operator^(const BitFlagSet<N, T> &rhs) const { BitFlagSet<N, T> v = *this; v ^= rhs; return v; }
|
|
constexpr BitFlagSet<N, T> operator|(const BitFlagSet<N, T> &rhs) const { BitFlagSet<N, T> v = *this; v |= rhs; return v; }
|
|
|
|
constexpr BitFlagSet<N, T> &operator&=(const BitFlagSet<N, T> &rhs) { ams::util::impl::AndImpl<StorageCount>(this->_storage, rhs._storage); return *this; }
|
|
constexpr BitFlagSet<N, T> &operator^=(const BitFlagSet<N, T> &rhs) { ams::util::impl::XorImpl<StorageCount>(this->_storage, rhs._storage); return *this; }
|
|
constexpr BitFlagSet<N, T> &operator|=(const BitFlagSet<N, T> &rhs) { ams::util::impl::OrImpl<StorageCount>(this->_storage, rhs._storage); return *this; }
|
|
};
|
|
|
|
template<size_t N, typename T>
|
|
template<s32 Index>
|
|
constexpr inline const BitFlagSet<N, T> BitFlagSet<N, T>::Flag<Index>::Mask = { { static_cast<typename SingleStorageTrait<BitFlagSet<N, T>::StorageCount>::Type>(1) << Index } };
|
|
|
|
template<size_t N, typename T>
|
|
constexpr BitFlagSet<N, T> MakeBitFlagSet() { return BitFlagSet<N, T>{}; }
|
|
|
|
template<size_t N>
|
|
constexpr BitFlagSet<N, void> MakeBitFlagSet() { return MakeBitFlagSet<N, void>(); }
|
|
|
|
}
|