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#include "genetic/phenotypebinary.h"
#include <bu/random.h>
#include <bu/sio.h>
using namespace Bu;
// Bits per word
#define BPW (sizeof(uint_fast32_t)*8)
#define wordsForBits( x ) (((x)/BPW)+(((x)%BPW)?1:0))
#define wordWithBit( x ) ((x)/BPW)
Genetic::PhenotypeBinary::PhenotypeBinary( int iSize, bool bRandom ) :
iSize( iSize ),
iWords( wordsForBits(iSize) ),
aGenes( NULL )
{
aGenes = new uint_fast32_t[iWords];
if( bRandom )
randomize();
}
Genetic::PhenotypeBinary::~PhenotypeBinary()
{
delete[] aGenes;
}
Genetic::Phenotype &Genetic::PhenotypeBinary::randomize()
{
for( int j = 0; j < iWords*sizeof(uint_fast32_t); j++ )
{
((uint8_t *)aGenes)[j] = (uint8_t)Bu::Random::rand();
}
return *this;
}
void Genetic::PhenotypeBinary::mutate( int iLocation, float fMagnitude )
{
if( fMagnitude > -0.5 && fMagnitude < 0.5 )
return;
aGenes[wordWithBit(iLocation)] =
(aGenes[wordWithBit(iLocation)]&(~(1<<((iLocation)%BPW)))) |
((~aGenes[wordWithBit(iLocation)])&((1<<((iLocation)%BPW))));
}
Genetic::Phenotype *Genetic::PhenotypeBinary::makeEmptyOffspring(
int iNewSize )
{
if( iNewSize < 0 )
iNewSize = iSize;
return new PhenotypeBinary( iSize );
}
Genetic::Phenotype &Genetic::PhenotypeBinary::copyFrom( const Phenotype &rSrc,
int iStart, int iCount, int iDest )
{
const PhenotypeBinary &rbSrc =
dynamic_cast<const Genetic::PhenotypeBinary &>(rSrc);
if( iDest < 0 )
iDest = iStart;
// Fist draft, very sloppy: bit by bit copy, this is stupid, but easy
for( int j = 0; j < iCount; j++ )
{
int wd = wordWithBit(j+iDest);
int ws = wordWithBit(j+iStart);
if( (rbSrc.aGenes[ws]&(1<<((j+iStart)%BPW))) == 0)
{
aGenes[wd] &= ~(1<<((j+iDest)%BPW));
}
else
{
aGenes[wd] |= (1<<((j+iDest)%BPW));
}
}
/*
iStart%BPW
int iWords = wordsForBits(iCount);
for( int j = wordWithBit(iStart); j < iWords; j++ )
{
}
*/
return *this;
}
Bu::String Genetic::PhenotypeBinary::toString()
{
Bu::String sRet;
for( int j = 0; j < iSize; j++ )
{
sRet += (aGenes[j/BPW]&(1<<(j%BPW)))?'1':'0';
}
return sRet;
}
void Genetic::PhenotypeBinary::extractBits( uint32_t &rTarget, int iStart,
int iBits )
{
rTarget = 0;
if( iBits > sizeof(rTarget)*8 )
iBits = sizeof(rTarget)*8;
// This is pretty much the same problem as copyFrom, so I'm doing it the
// same way for now.
for( int j = 0; j < iBits; j++ )
{
int ws = wordWithBit(j+iStart);
if( (aGenes[ws]&(1<<((j+iStart)%BPW))) != 0 )
rTarget |= (1<<(j%BPW));
}
}
void Genetic::PhenotypeBinary::extractBits( uint64_t &rTarget, int iStart,
int iBits )
{
rTarget = 0;
if( iBits > sizeof(rTarget)*8 )
iBits = sizeof(rTarget)*8;
// This is pretty much the same problem as copyFrom, so I'm doing it the
// same way for now.
for( int j = 0; j < iBits; j++ )
{
int ws = wordWithBit(j+iStart);
if( (aGenes[ws]&(1<<((j+iStart)%BPW))) != 0 )
rTarget |= (1ll<<(j));
}
}
void Genetic::PhenotypeBinary::write( Bu::Stream &rStream )
{
rStream.write( aGenes, sizeof(uint_fast32_t)*iWords );
}
void Genetic::PhenotypeBinary::read( Bu::Stream &rStream )
{
rStream.read( aGenes, sizeof(uint_fast32_t)*iWords );
}
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