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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#ifndef bitSetAsUint64_DEFINED
#define bitSetAsUint64_DEFINED 1
#include "bitset.h"
template <typename Env, typename BitSetTraits>
class BitSetOps</*BitSetType*/ UINT64,
/*Brand*/ BSUInt64,
/*Env*/ Env,
/*BitSetTraits*/ BitSetTraits>
{
public:
typedef UINT64 Rep;
private:
static UINT64 Singleton(unsigned bitNum)
{
assert(bitNum < sizeof(UINT64) * BitSetSupport::BitsInByte);
return (UINT64)1 << bitNum;
}
public:
static void Assign(Env env, UINT64& lhs, UINT64 rhs)
{
lhs = rhs;
}
static void AssignNouninit(Env env, UINT64& lhs, UINT64 rhs)
{
lhs = rhs;
}
static void AssignAllowUninitRhs(Env env, UINT64& lhs, UINT64 rhs)
{
lhs = rhs;
}
static void AssignNoCopy(Env env, UINT64& lhs, UINT64 rhs)
{
lhs = rhs;
}
static void OldStyleClearD(Env env, UINT64& bs)
{
bs = 0;
}
static void ClearD(Env env, UINT64& bs)
{
bs = 0;
}
static UINT64 MakeSingleton(Env env, unsigned bitNum)
{
assert(bitNum < BitSetTraits::GetSize(env));
return Singleton(bitNum);
}
static UINT64 MakeCopy(Env env, UINT64 bs)
{
return bs;
}
static bool IsEmpty(Env env, UINT64 bs)
{
return bs == 0;
}
static unsigned Count(Env env, UINT64 bs)
{
return BitSetSupport::CountBitsInIntegral(bs);
}
static void UnionD(Env env, UINT64& bs1, UINT64 bs2)
{
bs1 |= bs2;
}
static UINT64 Union(Env env, UINT64& bs1, UINT64 bs2)
{
return bs1 | bs2;
}
static void DiffD(Env env, UINT64& bs1, UINT64 bs2)
{
bs1 = bs1 & ~bs2;
}
static UINT64 Diff(Env env, UINT64 bs1, UINT64 bs2)
{
return bs1 & ~bs2;
}
static void RemoveElemD(Env env, UINT64& bs1, unsigned i)
{
assert(i < BitSetTraits::GetSize(env));
bs1 &= ~Singleton(i);
}
static UINT64 RemoveElem(Env env, UINT64 bs1, unsigned i)
{
return bs1 & ~Singleton(i);
}
static void AddElemD(Env env, UINT64& bs1, unsigned i)
{
assert(i < BitSetTraits::GetSize(env));
bs1 |= Singleton(i);
}
static UINT64 AddElem(Env env, UINT64 bs1, unsigned i)
{
assert(i < BitSetTraits::GetSize(env));
return bs1 | Singleton(i);
}
static bool IsMember(Env env, const UINT64 bs1, unsigned i)
{
assert(i < BitSetTraits::GetSize(env));
return (bs1 & Singleton(i)) != 0;
}
static void IntersectionD(Env env, UINT64& bs1, UINT64 bs2)
{
bs1 &= bs2;
}
static UINT64 Intersection(Env env, UINT64 bs1, UINT64 bs2)
{
return bs1 & bs2;
}
static bool IsEmptyIntersection(Env env, UINT64 bs1, UINT64 bs2)
{
return (bs1 & bs2) == 0;
}
static bool IsSubset(Env env, UINT64 bs1, UINT64 bs2)
{
return ((bs1 & bs2) == bs1);
}
static bool Equal(Env env, UINT64 bs1, UINT64 bs2)
{
return bs1 == bs2;
}
static UINT64 MakeEmpty(Env env)
{
return 0;
}
static UINT64 MakeFull(Env env)
{
unsigned sz = BitSetTraits::GetSize(env);
if (sz == sizeof(UINT64) * 8)
{
return UINT64(-1);
}
else
{
return (UINT64(1) << sz) - 1;
}
}
#ifdef DEBUG
static const char* ToString(Env env, UINT64 bs)
{
IAllocator* alloc = BitSetTraits::GetDebugOnlyAllocator(env);
const int CharsForUINT64 = sizeof(UINT64) * 2;
char* res = nullptr;
const int AllocSize = CharsForUINT64 + 4;
res = (char*)alloc->Alloc(AllocSize);
UINT64 bits = bs;
unsigned remaining = AllocSize;
char* ptr = res;
for (unsigned bytesDone = 0; bytesDone < sizeof(UINT64); bytesDone += sizeof(unsigned))
{
unsigned bits0 = (unsigned)bits;
sprintf_s(ptr, remaining, "%08X", bits0);
ptr += 8;
remaining -= 8;
bytesDone += 4;
assert(sizeof(unsigned) == 4);
// Doing this twice by 16, rather than once by 32, avoids warnings when size_t == unsigned.
bits = bits >> 16;
bits = bits >> 16;
}
return res;
}
#endif
static UINT64 UninitVal()
{
return 0;
}
static bool MayBeUninit(UINT64 bs)
{
return bs == UninitVal();
}
class Iter
{
UINT64 m_bits;
public:
Iter(Env env, const UINT64& bits) : m_bits(bits)
{
}
bool NextElem(Env env, unsigned* pElem)
{
if (m_bits)
{
unsigned bitNum = *pElem;
while ((m_bits & 0x1) == 0)
{
bitNum++;
m_bits >>= 1;
}
*pElem = bitNum;
m_bits &= ~0x1;
return true;
}
else
{
return false;
}
}
};
typedef UINT64 ValArgType;
typedef UINT64 RetValType;
};
#endif // bitSetAsUint64_DEFINED
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