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BitBoard.c
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C/C++ Source or Header
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1990-05-19
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3KB
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124 lines
/* BitBoard.c -- member functions of class BitBoard
THIS SOFTWARE FITS THE DESCRIPTION IN THE U.S. COPYRIGHT ACT OF A
"UNITED STATES GOVERNMENT WORK". IT WAS WRITTEN AS A PART OF THE
AUTHOR'S OFFICIAL DUTIES AS A GOVERNMENT EMPLOYEE. THIS MEANS IT
CANNOT BE COPYRIGHTED. THIS SOFTWARE IS FREELY AVAILABLE TO THE
PUBLIC FOR USE WITHOUT A COPYRIGHT NOTICE, AND THERE ARE NO
RESTRICTIONS ON ITS USE, NOW OR SUBSEQUENTLY.
Author:
K. E. Gorlen
Bg. 12A, Rm. 2033
Computer Systems Laboratory
Division of Computer Research and Technology
National Institutes of Health
Bethesda, Maryland 20892
Phone: (301) 496-1111
uucp: uunet!nih-csl!kgorlen
Internet: kgorlen@alw.nih.gov
January, 1986
Function:
$Log: BitBoard.c,v $
* Revision 3.0 90/05/20 00:19:09 kgorlen
* Release for 1st edition.
*
*/
#include "BitBoard.h"
#include "nihclIO.h"
#define THIS BitBoard
#define BASE Object
#define BASE_CLASSES BASE::desc()
#define MEMBER_CLASSES
#define VIRTUAL_BASE_CLASSES Object::desc()
DEFINE_CLASS(BitBoard,1,"$Header: /afs/alw.nih.gov/unix/sun4_40c/usr/local/src/nihcl-3.0/share/lib/RCS/BitBoard.c,v 3.0 90/05/20 00:19:09 kgorlen Rel $",BitBoard::init,NULL);
BitBoard squareBitBoard[64];
BitBoard rankBitBoard[8];
BitBoard fileBitBoard[8];
unsigned char bit_count[256];
void BitBoard::init(const Class&)
{
register BitBoard* p = squareBitBoard;
register unsigned i,j,k;
for (i=0; i<8; i++) {
for (j=0, k=1; j<8; j++, k+=k) {
(*p++).c[i] = k;
}
}
p = rankBitBoard;
register BitBoard* q = fileBitBoard;
for (i=0, k=1; i<8; i++, k+=k) {
(*p++).c[i] = 0xFF;
for (j=0; j<8; j++) {
(*q).c[j] = k;
}
q++;
}
}
unsigned BitBoard::capacity() const { return sizeof(BitBoard)*8; }
void BitBoard::deepenShallowCopy() {}
unsigned BitBoard::hash() const { return m[0]^m[1]; }
bool BitBoard::isEmpty() const { return m[0]==0 && m[1]==0; }
bool BitBoard::isEqual(const Object& ob) const
{
return ob.isSpecies(classDesc) && *this==castdown(ob);
}
const Class* BitBoard::species() const { return &classDesc; }
void BitBoard::printOn(ostream& strm) const
{
for (register i=0; i<8; i++) {
strm << '\n';
for (register j=7; j>=0; j--) {
if (includes(8*i+j)) strm << " *";
else strm << " .";
}
}
}
unsigned BitBoard::size() const { return count(); }
BitBoard::BitBoard(OIOin& strm)
: BASE(strm)
{
strm >> m[0] >> m[1];
}
void BitBoard::storer(OIOout& strm) const
{
BASE::storer(strm);
strm << m[0] << m[1];
}
BitBoard::BitBoard(OIOifd& fd)
: BASE(fd)
{
fd.get((char*)c,8);
}
void BitBoard::storer(OIOofd& fd) const
{
BASE::storer(fd);
fd.put((char*)c,8);
}
int BitBoard::compare(const Object&) const
{
shouldNotImplement("compare");
return 0;
}