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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that 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/>.
Additional permissions under GNU GPL version 3 section 7
If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
#ifndef hsBitVector_inc
#define hsBitVector_inc
#include "hsTypes.h"
template <class T> class hsTArray;
class hsStream;
class hsBitVector {
protected:
UInt32* fBitVectors;
UInt32 fNumBitVectors;
void IGrow(UInt32 newNumBitVectors);
friend class hsBitIterator;
public:
hsBitVector(const hsBitVector& other);
hsBitVector(UInt32 which) : fBitVectors(nil), fNumBitVectors(0) { SetBit(which); }
hsBitVector(int b, ...); // list of one or more integer bits to set. -1 (or any negative) terminates the list (e.g. hsBitVector(0,1,4,-1);
hsBitVector(const hsTArray<Int16>& list); // sets bit for each int in list
hsBitVector() : fBitVectors(nil), fNumBitVectors(0) {}
virtual ~hsBitVector() { Reset(); }
hsBitVector& Reset() { delete [] fBitVectors; fBitVectors = nil; fNumBitVectors = 0; return *this; }
hsBitVector& Clear(); // everyone clear, but no dealloc
hsBitVector& Set(int upToBit=-1); // WARNING - see comments at function
int operator==(const hsBitVector& other) const; // unset (ie uninitialized) bits are clear,
int operator!=(const hsBitVector& other) const { return !(*this == other); }
hsBitVector& operator=(const hsBitVector& other); // will wind up identical
hsBool ClearBit(UInt32 which) { return SetBit(which, 0); } // returns previous state
hsBool SetBit(UInt32 which, hsBool on = true); // returns previous state
hsBool IsBitSet(UInt32 which) const; // returns current state
hsBool ToggleBit(UInt32 which); // returns previous state
hsBitVector& RemoveBit(UInt32 which); // removes bit, sliding higher bits down to fill the gap.
friend inline int Overlap(const hsBitVector& lhs, const hsBitVector& rhs) { return lhs.Overlap(rhs); }
hsBool Overlap(const hsBitVector& other) const;
hsBool Empty() const;
hsBool operator[](UInt32 which) const { return IsBitSet(which); }
friend inline hsBitVector operator&(const hsBitVector& lhs, const hsBitVector& rhs); // See Overlap()
friend inline hsBitVector operator|(const hsBitVector& lhs, const hsBitVector& rhs);
friend inline hsBitVector operator^(const hsBitVector& lhs, const hsBitVector& rhs);
friend inline hsBitVector operator-(const hsBitVector& lhs, const hsBitVector& rhs); // return lhs w/ rhs's bits turned off
hsBitVector& operator&=(const hsBitVector& other); // See Overlap()
hsBitVector& operator|=(const hsBitVector& other);
hsBitVector& operator^=(const hsBitVector& other);
hsBitVector& operator-=(const hsBitVector& other); // return me w/ other's bits turned off
hsBitVector& Compact();
hsBitVector& SetSize(UInt32 numBits) { ClearBit(numBits+1); return *this; }
UInt32 GetSize() { return fNumBitVectors << 5; }
// integer level access
UInt32 GetNumBitVectors() const { return fNumBitVectors; }
UInt32 GetBitVector(int i) const { return fBitVectors[i]; }
void SetNumBitVectors(UInt32 n) { Reset(); fNumBitVectors=n; fBitVectors = TRACKED_NEW UInt32[n]; }
void SetBitVector(int i, UInt32 val) { fBitVectors[i]=val; }
// Do dst.SetCount(0), then add each set bit's index into dst, returning dst.
hsTArray<Int16>& Enumerate(hsTArray<Int16>& dst) const;
// this->Clear(), then set all bits listed in src, returning *this.
hsBitVector& FromList(const hsTArray<Int16>& src);
void Read(hsStream* s);
void Write(hsStream* s) const;
};
inline hsBitVector::hsBitVector(const hsBitVector& other)
{
if( 0 != (fNumBitVectors = other.fNumBitVectors) )
{
fBitVectors = TRACKED_NEW UInt32[fNumBitVectors];
int i;
for( i = 0; i < fNumBitVectors; i++ )
fBitVectors[i] = other.fBitVectors[i];
}
else
fBitVectors = nil;
}
inline hsBool hsBitVector::Empty() const
{
int i;
for( i = 0; i < fNumBitVectors; i++ )
{
if( fBitVectors[i] )
return false;
}
return true;
}
inline hsBool hsBitVector::Overlap(const hsBitVector& other) const
{
if( fNumBitVectors > other.fNumBitVectors )
return other.Overlap(*this);
int i;
for( i = 0; i < fNumBitVectors; i++ )
{
if( fBitVectors[i] & other.fBitVectors[i] )
return true;
}
return false;
}
inline hsBitVector& hsBitVector::operator=(const hsBitVector& other)
{
if( this != &other )
{
if( fNumBitVectors < other.fNumBitVectors )
{
Reset();
fNumBitVectors = other.fNumBitVectors;
fBitVectors = TRACKED_NEW UInt32[fNumBitVectors];
}
else
{
Clear();
}
int i;
for( i = 0; i < other.fNumBitVectors; i++ )
fBitVectors[i] = other.fBitVectors[i];
}
return *this;
}
inline int hsBitVector::operator==(const hsBitVector& other) const
{
if( fNumBitVectors < other.fNumBitVectors )
return other.operator==(*this);
int i;
for( i = 0; i < other.fNumBitVectors; i++ )
if( fBitVectors[i] ^ other.fBitVectors[i] )
return false;
for( ; i < fNumBitVectors; i++ )
if( fBitVectors[i] )
return false;
return true;
}
inline hsBitVector& hsBitVector::operator&=(const hsBitVector& other)
{
if( this == &other )
return *this;
if( fNumBitVectors > other.fNumBitVectors )
{
fNumBitVectors = other.fNumBitVectors;
}
int i;
for( i = 0; i < fNumBitVectors; i++ )
fBitVectors[i] &= other.fBitVectors[i];
return *this;
}
inline hsBitVector& hsBitVector::operator|=(const hsBitVector& other)
{
if( this == &other )
return *this;
if( fNumBitVectors < other.fNumBitVectors )
{
IGrow(other.fNumBitVectors);
}
int i;
for( i = 0; i < other.fNumBitVectors; i++ )
fBitVectors[i] |= other.fBitVectors[i];
return *this;
}
inline hsBitVector& hsBitVector::operator^=(const hsBitVector& other)
{
if( this == &other )
{
Clear();
return *this;
}
if( fNumBitVectors < other.fNumBitVectors )
{
IGrow(other.fNumBitVectors);
}
int i;
for( i = 0; i < other.fNumBitVectors; i++ )
fBitVectors[i] ^= other.fBitVectors[i];
return *this;
}
inline hsBitVector& hsBitVector::operator-=(const hsBitVector& other)
{
if( this == &other )
{
Clear();
return *this;
}
int minNum = fNumBitVectors < other.fNumBitVectors ? fNumBitVectors : other.fNumBitVectors;
int i;
for( i = 0; i < minNum; i++ )
fBitVectors[i] &= ~other.fBitVectors[i];
return *this;
}
inline hsBitVector operator&(const hsBitVector& rhs, const hsBitVector& lhs)
{
hsBitVector ret(rhs);
return ret &= lhs;
}
inline hsBitVector operator|(const hsBitVector& rhs, const hsBitVector& lhs)
{
hsBitVector ret(rhs);
return ret |= lhs;
}
inline hsBitVector operator^(const hsBitVector& rhs, const hsBitVector& lhs)
{
hsBitVector ret(rhs);
return ret ^= lhs;
}
inline hsBitVector operator-(const hsBitVector& rhs, const hsBitVector& lhs)
{
hsBitVector ret(rhs);
return ret -= lhs;
}
inline hsBitVector& hsBitVector::Clear()
{
int i;
for( i = 0; i < fNumBitVectors; i++ )
fBitVectors[i] = 0;
return *this;
}
// WARNING - since the bitvector is conceptually infinitely long,
// we can't actually set all the bits. If you pass in a non-negative
// upToBit, this sets all bits up to and including that one, otherwise
// it just sets however many bits are currently allocated. You can
// assure this is as many as you want by first calling SetSize, but
// if there are more bits than the requested size, these will also
// get set. Calling Set with a non-negative upToBit will only set
// the bits from 0 to upToBit, but won't clear any higher bits.
inline hsBitVector& hsBitVector::Set(int upToBit)
{
if( upToBit >= 0 )
{
UInt32 major = upToBit >> 5;
UInt32 minor = 1 << (upToBit & 0x1f);
if( major >= fNumBitVectors )
IGrow(major+1);
UInt32 i;
for( i = 0; i < major; i++ )
fBitVectors[i] = 0xffffffff;
for( i = 1; i <= minor && i > 0; i <<= 1 )
fBitVectors[major] |= i;
}
else
{
int i;
for( i = 0; i < fNumBitVectors; i++ )
fBitVectors[i] = 0xffffffff;
}
return *this;
}
inline hsBool hsBitVector::IsBitSet(UInt32 which) const
{
UInt32 major = which >> 5;
return
(major < fNumBitVectors)
&& (0 != (fBitVectors[major] & 1 << (which & 0x1f)));
}
inline hsBool hsBitVector::SetBit(UInt32 which, hsBool on)
{
UInt32 major = which >> 5;
UInt32 minor = 1 << (which & 0x1f);
if( major >= fNumBitVectors )
IGrow(major+1);
hsBool ret = 0 != (fBitVectors[major] & minor);
if( ret != on )
{
if( on )
fBitVectors[major] |= minor;
else
fBitVectors[major] &= ~minor;
}
return ret;
}
inline hsBool hsBitVector::ToggleBit(UInt32 which)
{
UInt32 major = which >> 5;
UInt32 minor = 1 << (which & 0x1f);
if( major >= fNumBitVectors )
IGrow(major);
hsBool ret = 0 != (fBitVectors[major] & minor);
if( ret )
fBitVectors[major] &= ~minor;
else
fBitVectors[major] |= minor;
return ret;
}
inline hsBitVector& hsBitVector::RemoveBit(UInt32 which)
{
UInt32 major = which >> 5;
if( major >= fNumBitVectors )
return *this;
UInt32 minor = 1 << (which & 0x1f);
UInt32 lowMask = minor-1;
UInt32 hiMask = ~(lowMask);
fBitVectors[major] = (fBitVectors[major] & lowMask)
| ((fBitVectors[major] >> 1) & hiMask);
while( major < fNumBitVectors-1 )
{
if( fBitVectors[major+1] & 0x1 )
fBitVectors[major] |= 0x80000000;
else
fBitVectors[major] &= ~0x80000000;
major++;
fBitVectors[major] >>= 1;
}
fBitVectors[major] &= ~0x80000000;
return *this;
}
class hsBitIterator
{
protected:
const hsBitVector& fBits;
int fCurrent;
int fCurrVec;
int fCurrBit;
int IAdvanceBit();
int IAdvanceVec();
public:
// Must call begin after instanciating.
hsBitIterator(const hsBitVector& bits) : fBits(bits) {}
int Begin();
int Current() const { return fCurrent; }
int Advance();
int End() const { return fCurrVec < 0; }
};
#endif // hsBitVector_inc