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source-engine/public/bitvec.h

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2020-04-22 16:56:21 +00:00
//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//===========================================================================//
#ifndef BITVEC_H
#define BITVEC_H
#ifdef _WIN32
#pragma once
#endif
#include <limits.h>
#include "tier0/dbg.h"
#include "tier0/basetypes.h"
class CBitVecAccessor
{
public:
CBitVecAccessor(uint32 *pDWords, int iBit);
void operator=(int val);
operator uint32();
private:
uint32 *m_pDWords;
int m_iBit;
};
//-----------------------------------------------------------------------------
// Support functions
//-----------------------------------------------------------------------------
#define LOG2_BITS_PER_INT 5
#define BITS_PER_INT 32
#if _WIN32 && !defined(_X360)
#include <intrin.h>
#pragma intrinsic(_BitScanForward)
#endif
inline int FirstBitInWord( unsigned int elem, int offset )
{
#if _WIN32
if ( !elem )
return -1;
#if defined( _X360 )
// this implements CountTrailingZeros() / BitScanForward()
unsigned int mask = elem-1;
unsigned int comp = ~elem;
elem = mask & comp;
return (32 - _CountLeadingZeros(elem)) + offset;
#else
unsigned long out;
_BitScanForward(&out, elem);
return out + offset;
#endif
#else
static unsigned firstBitLUT[256] =
{
0,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,5,0,1,0,2,0,1,0,
3,0,1,0,2,0,1,0,4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,6,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,5,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4,0,1,0,2,0,1,0,
3,0,1,0,2,0,1,0,7,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
5,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,6,0,1,0,2,0,1,0,
3,0,1,0,2,0,1,0,4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,5,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
};
unsigned elemByte;
elemByte = (elem & 0xFF);
if ( elemByte )
return offset + firstBitLUT[elemByte];
elem >>= 8;
offset += 8;
elemByte = (elem & 0xFF);
if ( elemByte )
return offset + firstBitLUT[elemByte];
elem >>= 8;
offset += 8;
elemByte = (elem & 0xFF);
if ( elemByte )
return offset + firstBitLUT[elemByte];
elem >>= 8;
offset += 8;
elemByte = (elem & 0xFF);
if ( elemByte )
return offset + firstBitLUT[elemByte];
return -1;
#endif
}
//-------------------------------------
inline unsigned GetEndMask( int numBits )
{
static unsigned bitStringEndMasks[] =
{
0xffffffff,
0x00000001,
0x00000003,
0x00000007,
0x0000000f,
0x0000001f,
0x0000003f,
0x0000007f,
0x000000ff,
0x000001ff,
0x000003ff,
0x000007ff,
0x00000fff,
0x00001fff,
0x00003fff,
0x00007fff,
0x0000ffff,
0x0001ffff,
0x0003ffff,
0x0007ffff,
0x000fffff,
0x001fffff,
0x003fffff,
0x007fffff,
0x00ffffff,
0x01ffffff,
0x03ffffff,
0x07ffffff,
0x0fffffff,
0x1fffffff,
0x3fffffff,
0x7fffffff,
};
return bitStringEndMasks[numBits % BITS_PER_INT];
}
fix some undefined behaviors
2020-11-18 14:30:58 +00:00
inline uint GetBitForBitnum( int bitNum )
1
2020-04-22 16:56:21 +00:00
{
static int bitsForBitnum[] =
{
( 1 << 0 ),
( 1 << 1 ),
( 1 << 2 ),
( 1 << 3 ),
( 1 << 4 ),
( 1 << 5 ),
( 1 << 6 ),
( 1 << 7 ),
( 1 << 8 ),
( 1 << 9 ),
( 1 << 10 ),
( 1 << 11 ),
( 1 << 12 ),
( 1 << 13 ),
( 1 << 14 ),
( 1 << 15 ),
( 1 << 16 ),
( 1 << 17 ),
( 1 << 18 ),
( 1 << 19 ),
( 1 << 20 ),
( 1 << 21 ),
( 1 << 22 ),
( 1 << 23 ),
( 1 << 24 ),
( 1 << 25 ),
( 1 << 26 ),
( 1 << 27 ),
( 1 << 28 ),
( 1 << 29 ),
( 1 << 30 ),
( 1 << 31 ),
};
return bitsForBitnum[ (bitNum) & (BITS_PER_INT-1) ];
}
inline int GetBitForBitnumByte( int bitNum )
{
static int bitsForBitnum[] =
{
( 1 << 0 ),
( 1 << 1 ),
( 1 << 2 ),
( 1 << 3 ),
( 1 << 4 ),
( 1 << 5 ),
( 1 << 6 ),
( 1 << 7 ),
};
return bitsForBitnum[ bitNum & 7 ];
}
inline int CalcNumIntsForBits( int numBits ) { return (numBits + (BITS_PER_INT-1)) / BITS_PER_INT; }
#ifdef _X360
#define BitVec_Bit( bitNum ) GetBitForBitnum( bitNum )
#define BitVec_BitInByte( bitNum ) GetBitForBitnumByte( bitNum )
#else
#define BitVec_Bit( bitNum ) ( 1 << ( (bitNum) & (BITS_PER_INT-1) ) )
#define BitVec_BitInByte( bitNum ) ( 1 << ( (bitNum) & 7 ) )
#endif
#define BitVec_Int( bitNum ) ( (bitNum) >> LOG2_BITS_PER_INT )
//-----------------------------------------------------------------------------
// template CBitVecT
//
// Defines the operations relevant to any bit array. Simply requires a base
// class that implements GetNumBits(), Base(), GetNumDWords() & ValidateOperand()
//
// CVarBitVec and CBitVec<int> are the actual classes generally used
// by clients
//
template <class BASE_OPS>
class CBitVecT : public BASE_OPS
{
public:
CBitVecT();
CBitVecT(int numBits); // Must be initialized with the number of bits
void Init(int val = 0);
// Access the bits like an array.
CBitVecAccessor operator[](int i);
// Do NOT override bitwise operators (see note in header)
void And(const CBitVecT &andStr, CBitVecT *out) const;
void Or(const CBitVecT &orStr, CBitVecT *out) const;
void Xor(const CBitVecT &orStr, CBitVecT *out) const;
void Not(CBitVecT *out) const;
void CopyTo(CBitVecT *out) const;
void Copy( const CBitVecT<BASE_OPS> &other, int nBits=-1 );
bool Compare( const CBitVecT<BASE_OPS> &other, int nBits=-1 ) const;
bool IsAllClear(void) const; // Are all bits zero?
bool IsAllSet(void) const; // Are all bits one?
uint32 Get( uint32 bitNum ) const;
bool IsBitSet( int bitNum ) const;
void Set( int bitNum );
void Set( int bitNum, bool bNewVal );
void Clear(int bitNum);
bool TestAndSet(int bitNum);
void Set( uint32 offset, uint32 mask );
void Clear( uint32 offset, uint32 mask );
uint32 Get( uint32 offset, uint32 mask );
void SetAll(void); // Sets all bits
void ClearAll(void); // Clears all bits
uint32 GetDWord(int i) const;
void SetDWord(int i, uint32 val);
CBitVecT<BASE_OPS>& operator=(const CBitVecT<BASE_OPS> &other) { other.CopyTo( this ); return *this; }
bool operator==(const CBitVecT<BASE_OPS> &other) { return Compare( other ); }
bool operator!=(const CBitVecT<BASE_OPS> &other) { return !operator==( other ); }
static void GetOffsetMaskForBit( uint32 bitNum, uint32 *pOffset, uint32 *pMask ) { *pOffset = BitVec_Int( bitNum ); *pMask = BitVec_Bit( bitNum ); }
};
//-----------------------------------------------------------------------------
// class CVarBitVecBase
//
// Defines the operations necessary for a variable sized bit array
template <typename BITCOUNTTYPE>
class CVarBitVecBase
{
public:
bool IsFixedSize() const { return false; }
int GetNumBits(void) const { return m_numBits; }
void Resize( int numBits, bool bClearAll = false ); // resizes bit array
int GetNumDWords() const { return m_numInts; }
uint32 *Base() { return m_pInt; }
const uint32 *Base() const { return m_pInt; }
void Attach( uint32 *pBits, int numBits );
bool Detach( uint32 **ppBits, int *pNumBits );
int FindNextSetBit(int iStartBit) const; // returns -1 if no set bit was found
protected:
CVarBitVecBase();
CVarBitVecBase(int numBits);
CVarBitVecBase( const CVarBitVecBase<BITCOUNTTYPE> &from );
CVarBitVecBase &operator=( const CVarBitVecBase<BITCOUNTTYPE> &from );
~CVarBitVecBase(void);
void ValidateOperand( const CVarBitVecBase<BITCOUNTTYPE> &operand ) const { Assert(GetNumBits() == operand.GetNumBits()); }
unsigned GetEndMask() const { return ::GetEndMask( GetNumBits() ); }
private:
BITCOUNTTYPE m_numBits; // Number of bits in the bitstring
BITCOUNTTYPE m_numInts; // Number of ints to needed to store bitstring
uint32 m_iBitStringStorage; // If the bit string fits in one int, it goes here
uint32 * m_pInt; // Array of ints containing the bitstring
void AllocInts( int numInts ); // Free the allocated bits
void ReallocInts( int numInts );
void FreeInts( void ); // Free the allocated bits
};
//-----------------------------------------------------------------------------
// class CFixedBitVecBase
//
// Defines the operations necessary for a fixed sized bit array.
//
template <int bits> struct BitCountToEndMask_t { };
template <> struct BitCountToEndMask_t< 0> { enum { MASK = 0xffffffff }; };
template <> struct BitCountToEndMask_t< 1> { enum { MASK = 0x00000001 }; };
template <> struct BitCountToEndMask_t< 2> { enum { MASK = 0x00000003 }; };
template <> struct BitCountToEndMask_t< 3> { enum { MASK = 0x00000007 }; };
template <> struct BitCountToEndMask_t< 4> { enum { MASK = 0x0000000f }; };
template <> struct BitCountToEndMask_t< 5> { enum { MASK = 0x0000001f }; };
template <> struct BitCountToEndMask_t< 6> { enum { MASK = 0x0000003f }; };
template <> struct BitCountToEndMask_t< 7> { enum { MASK = 0x0000007f }; };
template <> struct BitCountToEndMask_t< 8> { enum { MASK = 0x000000ff }; };
template <> struct BitCountToEndMask_t< 9> { enum { MASK = 0x000001ff }; };
template <> struct BitCountToEndMask_t<10> { enum { MASK = 0x000003ff }; };
template <> struct BitCountToEndMask_t<11> { enum { MASK = 0x000007ff }; };
template <> struct BitCountToEndMask_t<12> { enum { MASK = 0x00000fff }; };
template <> struct BitCountToEndMask_t<13> { enum { MASK = 0x00001fff }; };
template <> struct BitCountToEndMask_t<14> { enum { MASK = 0x00003fff }; };
template <> struct BitCountToEndMask_t<15> { enum { MASK = 0x00007fff }; };
template <> struct BitCountToEndMask_t<16> { enum { MASK = 0x0000ffff }; };
template <> struct BitCountToEndMask_t<17> { enum { MASK = 0x0001ffff }; };
template <> struct BitCountToEndMask_t<18> { enum { MASK = 0x0003ffff }; };
template <> struct BitCountToEndMask_t<19> { enum { MASK = 0x0007ffff }; };
template <> struct BitCountToEndMask_t<20> { enum { MASK = 0x000fffff }; };
template <> struct BitCountToEndMask_t<21> { enum { MASK = 0x001fffff }; };
template <> struct BitCountToEndMask_t<22> { enum { MASK = 0x003fffff }; };
template <> struct BitCountToEndMask_t<23> { enum { MASK = 0x007fffff }; };
template <> struct BitCountToEndMask_t<24> { enum { MASK = 0x00ffffff }; };
template <> struct BitCountToEndMask_t<25> { enum { MASK = 0x01ffffff }; };
template <> struct BitCountToEndMask_t<26> { enum { MASK = 0x03ffffff }; };
template <> struct BitCountToEndMask_t<27> { enum { MASK = 0x07ffffff }; };
template <> struct BitCountToEndMask_t<28> { enum { MASK = 0x0fffffff }; };
template <> struct BitCountToEndMask_t<29> { enum { MASK = 0x1fffffff }; };
template <> struct BitCountToEndMask_t<30> { enum { MASK = 0x3fffffff }; };
template <> struct BitCountToEndMask_t<31> { enum { MASK = 0x7fffffff }; };
//-------------------------------------
template <int NUM_BITS>
class CFixedBitVecBase
{
public:
bool IsFixedSize() const { return true; }
int GetNumBits(void) const { return NUM_BITS; }
void Resize( int numBits, bool bClearAll = false ) { Assert(numBits == NUM_BITS); if ( bClearAll ) Plat_FastMemset( m_Ints, 0, NUM_INTS * sizeof(uint32) ); }// for syntatic consistency (for when using templates)
int GetNumDWords() const { return NUM_INTS; }
uint32 * Base() { return m_Ints; }
const uint32 * Base() const { return m_Ints; }
int FindNextSetBit(int iStartBit) const; // returns -1 if no set bit was found
protected:
CFixedBitVecBase() {}
CFixedBitVecBase(int numBits) { Assert( numBits == NUM_BITS ); } // doesn't make sense, really. Supported to simplify templates & allow easy replacement of variable
void ValidateOperand( const CFixedBitVecBase<NUM_BITS> &operand ) const { } // no need, compiler does so statically
public: // for test code
unsigned GetEndMask() const { return static_cast<unsigned>( BitCountToEndMask_t<NUM_BITS % BITS_PER_INT>::MASK ); }
private:
enum
{
NUM_INTS = (NUM_BITS + (BITS_PER_INT-1)) / BITS_PER_INT
};
uint32 m_Ints[(NUM_BITS + (BITS_PER_INT-1)) / BITS_PER_INT];
};
//-----------------------------------------------------------------------------
//
// The actual classes used
//
// inheritance instead of typedef to allow forward declarations
class CVarBitVec : public CBitVecT< CVarBitVecBase<unsigned short> >
{
public:
CVarBitVec()
{
}
CVarBitVec(int numBits)
: CBitVecT< CVarBitVecBase<unsigned short> >(numBits)
{
}
};
class CLargeVarBitVec : public CBitVecT< CVarBitVecBase<int> >
{
public:
CLargeVarBitVec()
{
}
CLargeVarBitVec(int numBits)
: CBitVecT< CVarBitVecBase<int> >(numBits)
{
}
};
//-----------------------------------------------------------------------------
template < int NUM_BITS >
class CBitVec : public CBitVecT< CFixedBitVecBase<NUM_BITS> >
{
public:
CBitVec()
{
}
CBitVec(int numBits)
: CBitVecT< CFixedBitVecBase<NUM_BITS> >(numBits)
{
}
};
//-----------------------------------------------------------------------------
typedef CBitVec<32> CDWordBitVec;
//-----------------------------------------------------------------------------
template <typename BITCOUNTTYPE>
inline CVarBitVecBase<BITCOUNTTYPE>::CVarBitVecBase()
{
Plat_FastMemset( this, 0, sizeof( *this ) );
}
//-----------------------------------------------------------------------------
template <typename BITCOUNTTYPE>
inline CVarBitVecBase<BITCOUNTTYPE>::CVarBitVecBase(int numBits)
{
Assert( numBits );
m_numBits = numBits;
// Figure out how many ints are needed
m_numInts = CalcNumIntsForBits( numBits );
m_pInt = NULL;
AllocInts( m_numInts );
}
//-----------------------------------------------------------------------------
template <typename BITCOUNTTYPE>
inline CVarBitVecBase<BITCOUNTTYPE>::CVarBitVecBase( const CVarBitVecBase<BITCOUNTTYPE> &from )
{
if ( from.m_numInts )
{
m_numBits = from.m_numBits;
m_numInts = from.m_numInts;
m_pInt = NULL;
AllocInts( m_numInts );
memcpy( m_pInt, from.m_pInt, m_numInts * sizeof(int) );
}
else
memset( this, 0, sizeof( *this ) );
}
//-----------------------------------------------------------------------------
template <typename BITCOUNTTYPE>
inline CVarBitVecBase<BITCOUNTTYPE> &CVarBitVecBase<BITCOUNTTYPE>::operator=( const CVarBitVecBase<BITCOUNTTYPE> &from )
{
Resize( from.GetNumBits() );
if ( m_pInt )
memcpy( m_pInt, from.m_pInt, m_numInts * sizeof(int) );
return (*this);
}
//-----------------------------------------------------------------------------
// Purpose: Destructor
// Input :
// Output :
//-----------------------------------------------------------------------------
template <typename BITCOUNTTYPE>
inline CVarBitVecBase<BITCOUNTTYPE>::~CVarBitVecBase(void)
{
FreeInts();
}
//-----------------------------------------------------------------------------
template <typename BITCOUNTTYPE>
inline void CVarBitVecBase<BITCOUNTTYPE>::Attach( uint32 *pBits, int numBits )
{
FreeInts();
m_numBits = numBits;
m_numInts = CalcNumIntsForBits( numBits );
if ( m_numInts > 1 )
{
m_pInt = pBits;
}
else
{
m_iBitStringStorage = *pBits;
m_pInt = &m_iBitStringStorage;
free( pBits );
}
}
//-----------------------------------------------------------------------------
template <typename BITCOUNTTYPE>
inline bool CVarBitVecBase<BITCOUNTTYPE>::Detach( uint32 **ppBits, int *pNumBits )
{
if ( !m_numBits )
{
return false;
}
*pNumBits = m_numBits;
if ( m_numInts > 1 )
{
*ppBits = m_pInt;
}
else
{
*ppBits = (uint32 *)malloc( sizeof(uint32) );
**ppBits = m_iBitStringStorage;
free( m_pInt );
}
memset( this, 0, sizeof( *this ) );
return true;
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline CBitVecT<BASE_OPS>::CBitVecT()
{
// undef this is ints are not 4 bytes
// generate a compile error if sizeof(int) is not 4 (HACK: can't use the preprocessor so use the compiler)
COMPILE_TIME_ASSERT( sizeof(int)==4 );
// Initialize bitstring by clearing all bits
ClearAll();
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline CBitVecT<BASE_OPS>::CBitVecT(int numBits)
: BASE_OPS( numBits )
{
// undef this is ints are not 4 bytes
// generate a compile error if sizeof(int) is not 4 (HACK: can't use the preprocessor so use the compiler)
COMPILE_TIME_ASSERT( sizeof(int)==4 );
// Initialize bitstring by clearing all bits
ClearAll();
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline CBitVecAccessor CBitVecT<BASE_OPS>::operator[](int i)
{
Assert(i >= 0 && i < this->GetNumBits());
return CBitVecAccessor(this->Base(), i);
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::Init( int val )
{
if ( this->Base() )
Plat_FastMemset( this->Base(), ( val ) ? 0xff : 0, this->GetNumDWords() * sizeof(int) );
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline uint32 CBitVecT<BASE_OPS>::Get( uint32 bitNum ) const
{
Assert( bitNum < (uint32)this->GetNumBits() );
const uint32 *pInt = this->Base() + BitVec_Int( bitNum );
return ( *pInt & BitVec_Bit( bitNum ) );
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline bool CBitVecT<BASE_OPS>::IsBitSet( int bitNum ) const
{
Assert( bitNum >= 0 && bitNum < this->GetNumBits() );
const uint32 *pInt = this->Base() + BitVec_Int( bitNum );
return ( ( *pInt & BitVec_Bit( bitNum ) ) != 0 );
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::Set( int bitNum )
{
Assert( bitNum >= 0 && bitNum < this->GetNumBits() );
uint32 *pInt = this->Base() + BitVec_Int( bitNum );
*pInt |= BitVec_Bit( bitNum );
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline bool CBitVecT<BASE_OPS>::TestAndSet(int bitNum)
{
Assert( bitNum >= 0 && bitNum < this->GetNumBits() );
uint32 bitVecBit = BitVec_Bit( bitNum );
uint32 *pInt = this->Base() + BitVec_Int( bitNum );
bool bResult = ( ( *pInt & bitVecBit) != 0 );
*pInt |= bitVecBit;
return bResult;
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::Clear(int bitNum)
{
Assert( bitNum >= 0 && bitNum < this->GetNumBits() );
uint32 *pInt = this->Base() + BitVec_Int( bitNum );
*pInt &= ~BitVec_Bit( bitNum );
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::Set( int bitNum, bool bNewVal )
{
uint32 *pInt = this->Base() + BitVec_Int( bitNum );
uint32 bitMask = BitVec_Bit( bitNum );
if ( bNewVal )
{
*pInt |= bitMask;
}
else
{
*pInt &= ~bitMask;
}
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::Set( uint32 offset, uint32 mask )
{
uint32 *pInt = this->Base() + offset;
*pInt |= mask;
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::Clear( uint32 offset, uint32 mask )
{
uint32 *pInt = this->Base() + offset;
*pInt &= ~mask;
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline uint32 CBitVecT<BASE_OPS>::Get( uint32 offset, uint32 mask )
{
uint32 *pInt = this->Base() + offset;
return ( *pInt & mask );
}
//-----------------------------------------------------------------------------
// Purpose:
// Input :
// Output :
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::And(const CBitVecT &addStr, CBitVecT *out) const
{
this->ValidateOperand( addStr );
this->ValidateOperand( *out );
uint32 * pDest = out->Base();
const uint32 *pOperand1 = this->Base();
const uint32 *pOperand2 = addStr.Base();
for (int i = this->GetNumDWords() - 1; i >= 0 ; --i)
{
pDest[i] = pOperand1[i] & pOperand2[i];
}
}
//-----------------------------------------------------------------------------
// Purpose:
// Input :
// Output :
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::Or(const CBitVecT &orStr, CBitVecT *out) const
{
this->ValidateOperand( orStr );
this->ValidateOperand( *out );
uint32 * pDest = out->Base();
const uint32 *pOperand1 = this->Base();
const uint32 *pOperand2 = orStr.Base();
for (int i = this->GetNumDWords() - 1; i >= 0; --i)
{
pDest[i] = pOperand1[i] | pOperand2[i];
}
}
//-----------------------------------------------------------------------------
// Purpose:
// Input :
// Output :
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::Xor(const CBitVecT &xorStr, CBitVecT *out) const
{
uint32 * pDest = out->Base();
const uint32 *pOperand1 = this->Base();
const uint32 *pOperand2 = xorStr.Base();
for (int i = this->GetNumDWords() - 1; i >= 0; --i)
{
pDest[i] = pOperand1[i] ^ pOperand2[i];
}
}
//-----------------------------------------------------------------------------
// Purpose:
// Input :
// Output :
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::Not(CBitVecT *out) const
{
this->ValidateOperand( *out );
uint32 * pDest = out->Base();
const uint32 *pOperand = this->Base();
for (int i = this->GetNumDWords() - 1; i >= 0; --i)
{
pDest[i] = ~(pOperand[i]);
}
}
//-----------------------------------------------------------------------------
// Purpose: Copy a bit string
// Input :
// Output :
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::CopyTo(CBitVecT *out) const
{
out->Resize( this->GetNumBits() );
this->ValidateOperand( *out );
Assert( out != this );
memcpy( out->Base(), this->Base(), this->GetNumDWords() * sizeof( int ) );
}
//-----------------------------------------------------------------------------
// Purpose: Are all bits zero?
// Input :
// Output :
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline bool CBitVecT<BASE_OPS>::IsAllClear(void) const
{
// Number of available bits may be more than the number
// actually used, so make sure to mask out unused bits
// before testing for zero
(const_cast<CBitVecT *>(this))->Base()[this->GetNumDWords()-1] &= CBitVecT<BASE_OPS>::GetEndMask(); // external semantics of const retained
for (int i = this->GetNumDWords() - 1; i >= 0; --i)
{
if ( this->Base()[i] !=0 )
{
return false;
}
}
return true;
}
//-----------------------------------------------------------------------------
// Purpose: Are all bits set?
// Input :
// Output :
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline bool CBitVecT<BASE_OPS>::IsAllSet(void) const
{
// Number of available bits may be more than the number
// actually used, so make sure to mask out unused bits
// before testing for set bits
(const_cast<CBitVecT *>(this))->Base()[this->GetNumDWords()-1] |= ~CBitVecT<BASE_OPS>::GetEndMask(); // external semantics of const retained
for (int i = this->GetNumDWords() - 1; i >= 0; --i)
{
if ( this->Base()[i] != ~0 )
{
return false;
}
}
return true;
}
//-----------------------------------------------------------------------------
// Purpose: Sets all bits
// Input :
// Output :
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::SetAll(void)
{
if ( this->Base() )
Plat_FastMemset( this->Base(), 0xff, this->GetNumDWords() * sizeof(int) );
}
//-----------------------------------------------------------------------------
// Purpose: Clears all bits
// Input :
// Output :
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::ClearAll(void)
{
if ( this->Base() )
Plat_FastMemset( this->Base(), 0, this->GetNumDWords() * sizeof(int) );
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::Copy( const CBitVecT<BASE_OPS> &other, int nBits )
{
if ( nBits == - 1 )
{
nBits = other.GetNumBits();
}
this->Resize( nBits );
this->ValidateOperand( other );
Assert( &other != this );
memcpy( this->Base(), other.Base(), this->GetNumDWords() * sizeof( uint32 ) );
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline bool CBitVecT<BASE_OPS>::Compare( const CBitVecT<BASE_OPS> &other, int nBits ) const
{
if ( nBits == - 1 )
{
if ( other.GetNumBits() != this->GetNumBits() )
{
return false;
}
nBits = other.GetNumBits();
}
if ( nBits > other.GetNumBits() || nBits > this->GetNumBits() )
{
return false;
}
(const_cast<CBitVecT *>(this))->Base()[this->GetNumDWords()-1] &= CBitVecT<BASE_OPS>::GetEndMask(); // external semantics of const retained
(const_cast<CBitVecT *>(&other))->Base()[this->GetNumDWords()-1] &= other.CBitVecT<BASE_OPS>::GetEndMask(); // external semantics of const retained
int nBytes = PAD_NUMBER( nBits, 8 ) >> 3;
return ( memcmp( this->Base(), other.Base(), nBytes ) == 0 );
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline uint32 CBitVecT<BASE_OPS>::GetDWord(int i) const
{
Assert(i >= 0 && i < this->GetNumDWords());
return this->Base()[i];
}
//-----------------------------------------------------------------------------
template <class BASE_OPS>
inline void CBitVecT<BASE_OPS>::SetDWord(int i, uint32 val)
{
Assert(i >= 0 && i < this->GetNumDWords());
this->Base()[i] = val;
}
//-----------------------------------------------------------------------------
inline unsigned GetStartBitMask( int startBit )
{
static unsigned int g_StartMask[32] =
{
0xffffffff,
0xfffffffe,
0xfffffffc,
0xfffffff8,
0xfffffff0,
0xffffffe0,
0xffffffc0,
0xffffff80,
0xffffff00,
0xfffffe00,
0xfffffc00,
0xfffff800,
0xfffff000,
0xffffe000,
0xffffc000,
0xffff8000,
0xffff0000,
0xfffe0000,
0xfffc0000,
0xfff80000,
0xfff00000,
0xffe00000,
0xffc00000,
0xff800000,
0xff000000,
0xfe000000,
0xfc000000,
0xf8000000,
0xf0000000,
0xe0000000,
0xc0000000,
0x80000000,
};
return g_StartMask[ startBit & 31 ];
}
template <typename BITCOUNTTYPE>
inline int CVarBitVecBase<BITCOUNTTYPE>::FindNextSetBit( int startBit ) const
{
if ( startBit < GetNumBits() )
{
int wordIndex = BitVec_Int(startBit);
unsigned int startMask = GetStartBitMask( startBit );
int lastWord = GetNumDWords()-1;
// handle non dword lengths
if ( (GetNumBits() % BITS_PER_INT) != 0 )
{
unsigned int elem = Base()[wordIndex];
elem &= startMask;
if ( wordIndex == lastWord)
{
elem &= (GetEndMask());
// there's a bit remaining in this word
if ( elem )
return FirstBitInWord(elem, wordIndex << 5);
}
else
{
// there's a bit remaining in this word
if ( elem )
return FirstBitInWord(elem, wordIndex << 5);
// iterate the words
for ( int i = wordIndex+1; i < lastWord; i++ )
{
elem = Base()[i];
if ( elem )
return FirstBitInWord(elem, i << 5);
}
elem = Base()[lastWord] & GetEndMask();
if ( elem )
return FirstBitInWord(elem, lastWord << 5);
}
}
else
{
const uint32 * RESTRICT pCurElem = Base() + wordIndex;
unsigned int elem = *pCurElem;
elem &= startMask;
do
{
if ( elem )
return FirstBitInWord(elem, wordIndex << 5);
++pCurElem;
elem = *pCurElem;
++wordIndex;
} while( wordIndex <= lastWord );
}
}
return -1;
}
template <int NUM_BITS>
inline int CFixedBitVecBase<NUM_BITS>::FindNextSetBit( int startBit ) const
{
if ( startBit < NUM_BITS )
{
int wordIndex = BitVec_Int(startBit);
unsigned int startMask = GetStartBitMask( startBit );
// handle non dword lengths
if ( (NUM_BITS % BITS_PER_INT) != 0 )
{
unsigned int elem = Base()[wordIndex];
elem &= startMask;
if ( wordIndex == NUM_INTS-1)
{
elem &= (GetEndMask());
// there's a bit remaining in this word
if ( elem )
return FirstBitInWord(elem, wordIndex << 5);
}
else
{
// there's a bit remaining in this word
if ( elem )
return FirstBitInWord(elem, wordIndex << 5);
// iterate the words
for ( int i = wordIndex+1; i < NUM_INTS-1; i++ )
{
elem = Base()[i];
if ( elem )
return FirstBitInWord(elem, i << 5);
}
elem = Base()[NUM_INTS-1] & GetEndMask();
if ( elem )
return FirstBitInWord(elem, (NUM_INTS-1) << 5);
}
}
else
{
const uint32 * RESTRICT pCurElem = Base() + wordIndex;
unsigned int elem = *pCurElem;
elem &= startMask;
while ( wordIndex < NUM_INTS )
{
if ( elem )
{
return FirstBitInWord(elem, wordIndex << 5);
}
else if ( ++wordIndex < NUM_INTS )
{
++pCurElem;
elem = *pCurElem;
}
}
}
}
return -1;
}
//-----------------------------------------------------------------------------
// Unrolled loops for some common sizes
template<>
FORCEINLINE_TEMPLATE void CBitVecT< CFixedBitVecBase<256> >::And(const CBitVecT &addStr, CBitVecT *out) const
{
uint32 * pDest = out->Base();
const uint32 *pOperand1 = Base();
const uint32 *pOperand2 = addStr.Base();
pDest[0] = pOperand1[0] & pOperand2[0];
pDest[1] = pOperand1[1] & pOperand2[1];
pDest[2] = pOperand1[2] & pOperand2[2];
pDest[3] = pOperand1[3] & pOperand2[3];
pDest[4] = pOperand1[4] & pOperand2[4];
pDest[5] = pOperand1[5] & pOperand2[5];
pDest[6] = pOperand1[6] & pOperand2[6];
pDest[7] = pOperand1[7] & pOperand2[7];
}
template<>
FORCEINLINE_TEMPLATE bool CBitVecT< CFixedBitVecBase<256> >::IsAllClear(void) const
{
const uint32 *pInts = Base();
return ( pInts[0] == 0 && pInts[1] == 0 && pInts[2] == 0 && pInts[3] == 0 && pInts[4] == 0 && pInts[5] == 0 && pInts[6] == 0 && pInts[7] == 0 );
}
template<>
FORCEINLINE_TEMPLATE void CBitVecT< CFixedBitVecBase<256> >::CopyTo(CBitVecT *out) const
{
uint32 * pDest = out->Base();
const uint32 *pInts = Base();
pDest[0] = pInts[0];
pDest[1] = pInts[1];
pDest[2] = pInts[2];
pDest[3] = pInts[3];
pDest[4] = pInts[4];
pDest[5] = pInts[5];
pDest[6] = pInts[6];
pDest[7] = pInts[7];
}
template<>
FORCEINLINE_TEMPLATE void CBitVecT< CFixedBitVecBase<128> >::And(const CBitVecT &addStr, CBitVecT *out) const
{
uint32 * pDest = out->Base();
const uint32 *pOperand1 = Base();
const uint32 *pOperand2 = addStr.Base();
pDest[0] = pOperand1[0] & pOperand2[0];
pDest[1] = pOperand1[1] & pOperand2[1];
pDest[2] = pOperand1[2] & pOperand2[2];
pDest[3] = pOperand1[3] & pOperand2[3];
}
template<>
FORCEINLINE_TEMPLATE bool CBitVecT< CFixedBitVecBase<128> >::IsAllClear(void) const
{
const uint32 *pInts = Base();
return ( pInts[0] == 0 && pInts[1] == 0 && pInts[2] == 0 && pInts[3] == 0 );
}
template<>
FORCEINLINE_TEMPLATE void CBitVecT< CFixedBitVecBase<128> >::CopyTo(CBitVecT *out) const
{
uint32 * pDest = out->Base();
const uint32 *pInts = Base();
pDest[0] = pInts[0];
pDest[1] = pInts[1];
pDest[2] = pInts[2];
pDest[3] = pInts[3];
}
template<>
inline void CBitVecT< CFixedBitVecBase<96> >::And(const CBitVecT &addStr, CBitVecT *out) const
{
uint32 * pDest = out->Base();
const uint32 *pOperand1 = Base();
const uint32 *pOperand2 = addStr.Base();
pDest[0] = pOperand1[0] & pOperand2[0];
pDest[1] = pOperand1[1] & pOperand2[1];
pDest[2] = pOperand1[2] & pOperand2[2];
}
template<>
inline bool CBitVecT< CFixedBitVecBase<96> >::IsAllClear(void) const
{
const uint32 *pInts = Base();
return ( pInts[0] == 0 && pInts[1] == 0 && pInts[2] == 0 );
}
template<>
inline void CBitVecT< CFixedBitVecBase<96> >::CopyTo(CBitVecT *out) const
{
uint32 * pDest = out->Base();
const uint32 *pInts = Base();
pDest[0] = pInts[0];
pDest[1] = pInts[1];
pDest[2] = pInts[2];
}
template<>
inline void CBitVecT< CFixedBitVecBase<64> >::And(const CBitVecT &addStr, CBitVecT *out) const
{
uint32 * pDest = out->Base();
const uint32 *pOperand1 = Base();
const uint32 *pOperand2 = addStr.Base();
pDest[0] = pOperand1[0] & pOperand2[0];
pDest[1] = pOperand1[1] & pOperand2[1];
}
template<>
inline bool CBitVecT< CFixedBitVecBase<64> >::IsAllClear(void) const
{
const uint32 *pInts = Base();
return ( pInts[0] == 0 && pInts[1] == 0 );
}
template<>
inline void CBitVecT< CFixedBitVecBase<64> >::CopyTo(CBitVecT *out) const
{
uint32 * pDest = out->Base();
const uint32 *pInts = Base();
pDest[0] = pInts[0];
pDest[1] = pInts[1];
}
template<>
inline void CBitVecT< CFixedBitVecBase<32> >::And(const CBitVecT &addStr, CBitVecT *out) const
{
uint32 * pDest = out->Base();
const uint32 *pOperand1 = Base();
const uint32 *pOperand2 = addStr.Base();
pDest[0] = pOperand1[0] & pOperand2[0];
}
template<>
inline bool CBitVecT< CFixedBitVecBase<32> >::IsAllClear(void) const
{
const uint32 *pInts = Base();
return ( pInts[0] == 0 );
}
template<>
inline void CBitVecT< CFixedBitVecBase<32> >::CopyTo(CBitVecT *out) const
{
uint32 * pDest = out->Base();
const uint32 *pInts = Base();
pDest[0] = pInts[0];
}
//-----------------------------------------------------------------------------
template <>
inline uint32 CBitVecT< CFixedBitVecBase<32> >::Get( uint32 bitNum ) const
{
return ( *Base() & BitVec_Bit( bitNum ) );
}
//-----------------------------------------------------------------------------
template <>
inline bool CBitVecT< CFixedBitVecBase<32> >::IsBitSet( int bitNum ) const
{
return ( ( *Base() & BitVec_Bit( bitNum ) ) != 0 );
}
//-----------------------------------------------------------------------------
template <>
inline void CBitVecT< CFixedBitVecBase<32> >::Set( int bitNum )
{
*Base() |= BitVec_Bit( bitNum );
}
//-----------------------------------------------------------------------------
template <>
inline void CBitVecT< CFixedBitVecBase<32> >::Clear(int bitNum)
{
*Base() &= ~BitVec_Bit( bitNum );
}
//-----------------------------------------------------------------------------
template <>
inline void CBitVecT< CFixedBitVecBase<32> >::Set( int bitNum, bool bNewVal )
{
uint32 bitMask = BitVec_Bit( bitNum );
if ( bNewVal )
{
*Base() |= bitMask;
}
else
{
*Base() &= ~bitMask;
}
}
//-----------------------------------------------------------------------------
#include "tier0/memdbgon.h"
//-----------------------------------------------------------------------------
// Purpose: Resizes the bit string to a new number of bits
// Input : resizeNumBits -
//-----------------------------------------------------------------------------
template <typename BITCOUNTTYPE>
inline void CVarBitVecBase<BITCOUNTTYPE>::Resize( int resizeNumBits, bool bClearAll )
{
Assert( resizeNumBits >= 0 && ((BITCOUNTTYPE)resizeNumBits == resizeNumBits) );
int newIntCount = CalcNumIntsForBits( resizeNumBits );
if ( newIntCount != GetNumDWords() )
{
if ( Base() )
{
ReallocInts( newIntCount );
if ( !bClearAll && resizeNumBits >= GetNumBits() )
{
Base()[GetNumDWords() - 1] &= GetEndMask();
Plat_FastMemset( Base() + GetNumDWords(), 0, (newIntCount - GetNumDWords()) * sizeof(int) );
}
}
else
{
// Figure out how many ints are needed
AllocInts( newIntCount );
// Initialize bitstring by clearing all bits
bClearAll = true;
}
m_numInts = newIntCount;
}
else if ( !bClearAll && resizeNumBits >= GetNumBits() && Base() )
{
Base()[GetNumDWords() - 1] &= GetEndMask();
}
if ( bClearAll && Base() )
{
Plat_FastMemset( Base(), 0, newIntCount * sizeof(int) );
}
// store the new size and end mask
m_numBits = resizeNumBits;
}
//-----------------------------------------------------------------------------
// Purpose: Allocate the storage for the ints
// Input : numInts -
//-----------------------------------------------------------------------------
template <typename BITCOUNTTYPE>
inline void CVarBitVecBase<BITCOUNTTYPE>::AllocInts( int numInts )
{
Assert( !m_pInt );
if ( numInts == 0 )
return;
if ( numInts == 1 )
{
m_pInt = &m_iBitStringStorage;
return;
}
m_pInt = (uint32 *)malloc( numInts * sizeof(int) );
}
//-----------------------------------------------------------------------------
// Purpose: Reallocate the storage for the ints
// Input : numInts -
//-----------------------------------------------------------------------------
template <typename BITCOUNTTYPE>
inline void CVarBitVecBase<BITCOUNTTYPE>::ReallocInts( int numInts )
{
Assert( Base() );
if ( numInts == 0)
{
FreeInts();
return;
}
if ( m_pInt == &m_iBitStringStorage )
{
if ( numInts != 1 )
{
m_pInt = ((uint32 *)malloc( numInts * sizeof(int) ));
*m_pInt = m_iBitStringStorage;
}
return;
}
if ( numInts == 1 )
{
m_iBitStringStorage = *m_pInt;
free( m_pInt );
m_pInt = &m_iBitStringStorage;
return;
}
m_pInt = (uint32 *)realloc( m_pInt, numInts * sizeof(int) );
}
//-----------------------------------------------------------------------------
// Purpose: Free storage allocated with AllocInts
//-----------------------------------------------------------------------------
template <typename BITCOUNTTYPE>
inline void CVarBitVecBase<BITCOUNTTYPE>::FreeInts( void )
{
if ( m_numInts > 1 )
{
free( m_pInt );
}
m_pInt = NULL;
}
#include "tier0/memdbgoff.h"
// ------------------------------------------------------------------------ //
// CBitVecAccessor inlines.
// ------------------------------------------------------------------------ //
inline CBitVecAccessor::CBitVecAccessor(uint32 *pDWords, int iBit)
{
m_pDWords = pDWords;
m_iBit = iBit;
}
inline void CBitVecAccessor::operator=(int val)
{
if(val)
m_pDWords[m_iBit >> 5] |= (1 << (m_iBit & 31));
else
m_pDWords[m_iBit >> 5] &= ~(unsigned long)(1 << (m_iBit & 31));
}
inline CBitVecAccessor::operator uint32()
{
return m_pDWords[m_iBit >> 5] & (1 << (m_iBit & 31));
}
//=============================================================================
#endif // BITVEC_H
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