170 lines
3.3 KiB
C++
Executable File
170 lines
3.3 KiB
C++
Executable File
//-----------------------------------------------------------------------------
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// Torque Game Engine
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// Copyright (C) GarageGames.com, Inc.
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//-----------------------------------------------------------------------------
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#ifndef _BITVECTOR_H_
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#define _BITVECTOR_H_
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#ifndef _PLATFORM_H_
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#include "platform/platform.h"
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#endif
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/// Manage a vector of bits of arbitrary size.
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class BitVector
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{
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U8* mBits;
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U32 mByteSize;
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U32 mSize;
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static U32 calcByteSize(const U32 numBits);
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public:
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BitVector();
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BitVector(const U32 _size);
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~BitVector();
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/// @name Size Management
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/// @{
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void setSize(const U32 _size);
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U32 getSize() const;
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U32 getByteSize() const;
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U32 getAllocatedByteSize() const { return mByteSize; }
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const U8* getBits() const { return mBits; }
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U8* getNCBits() { return mBits; }
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/// @}
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bool copy(const BitVector& from);
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/// @name Mutators
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/// Note that bits are specified by index, unlike BitSet32.
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/// @{
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/// Clear all the bits.
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void clear();
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/// Set all the bits.
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void set();
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/// Set the specified bit.
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void set(U32 bit);
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/// Clear the specified bit.
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void clear(U32 bit);
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/// Test that the specified bit is set.
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bool test(U32 bit) const;
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/// @}
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};
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inline BitVector::BitVector()
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{
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mBits = NULL;
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mByteSize = 0;
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mSize = 0;
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}
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inline BitVector::BitVector(const U32 _size)
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{
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mBits = NULL;
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mByteSize = 0;
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mSize = 0;
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setSize(_size);
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}
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inline BitVector::~BitVector()
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{
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delete [] mBits;
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mBits = NULL;
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mByteSize = 0;
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mSize = 0;
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}
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inline U32 BitVector::calcByteSize(const U32 numBits)
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{
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// Make sure that we are 32 bit aligned
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//
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return (((numBits + 0x7) >> 3) + 0x3) & ~0x3;
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}
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inline void BitVector::setSize(const U32 _size)
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{
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if (_size != 0) {
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U32 newSize = calcByteSize(_size);
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if (mByteSize < newSize) {
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delete [] mBits;
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mBits = new U8[newSize];
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mByteSize = newSize;
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}
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} else {
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delete [] mBits;
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mBits = NULL;
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mByteSize = 0;
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}
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mSize = _size;
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}
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inline U32 BitVector::getSize() const
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{
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return mSize;
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}
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inline U32 BitVector::getByteSize() const
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{
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return calcByteSize(mSize);
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}
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inline void BitVector::clear()
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{
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if (mSize != 0)
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dMemset(mBits, 0x00, calcByteSize(mSize));
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}
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inline bool BitVector::copy(const BitVector& from)
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{
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U32 sourceSize = from.getSize();
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if (sourceSize) {
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setSize(sourceSize);
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dMemcpy(mBits, from.getBits(), getByteSize());
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return true;
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}
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return false;
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}
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inline void BitVector::set()
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{
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if (mSize != 0)
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dMemset(mBits, 0xFF, calcByteSize(mSize));
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}
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inline void BitVector::set(U32 bit)
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{
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AssertFatal(bit < mSize, "Error, out of range bit");
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mBits[bit >> 3] |= U8(1 << (bit & 0x7));
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}
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inline void BitVector::clear(U32 bit)
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{
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AssertFatal(bit < mSize, "Error, out of range bit");
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mBits[bit >> 3] &= U8(~(1 << (bit & 0x7)));
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}
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inline bool BitVector::test(U32 bit) const
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{
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AssertFatal(bit < mSize, "Error, out of range bit");
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return (mBits[bit >> 3] & U8(1 << (bit & 0x7))) != 0;
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}
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#endif //_BITVECTOR_H_
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