/* generate pawn captures and promotions */
void genattacksp(int f, int r, int c)
{
int forward = dir(c);
square loc = SQ(f,r);
r += forward;
if (f<7)
{
chesspiece p = getpiece(f+1, r);
if (p&&chesspiececolor(p)!=c)
pushmove(MV(loc, SQ(f+1, r)));
}
if (f>0)
{
chesspiece p = getpiece(f-1,r);
if (p&&chesspiececolor(p)!=c)
pushmove(MV(loc, SQ(f-1, r)));
}
if (c==WHITE)
{
if ((r==6)&&emptyp(f,r))
pushmove(MV(loc, SQ(f,r)));
}
else
{
if ((r==1)&&emptyp(f,r))
pushmove(MV(loc, SQ(f,r)));
}
/* get en passante */
if (doublepushp())
{
square start;
square end;
move m;
m = lastmove();
start = FR(m);
end = TO(m);
r -= forward; /* restore to original r */
if (R(end) == r)
{
if (((f+1) == F(start))||
((f-1) == F(start)))
pushmove(MV(loc, SQ(F(start),forward+r)));
}
}
}
void genmoves_nocastles()
{
int f,r;
int col = tomove();
for (f=0;f<8;f++)
{
for (r=0;r<8;r++)
{
chesspiece p = getpiece(f,r);
if (p && (chesspiececolor(p) == col))
{
int v = chesspiecevalue(p);
if (v==king)
{
getmovesk_nocastles(f,r,col);
}
else
{
generators[v](f,r,col);
}
}
}
}
}
void getmovesn(int f, int r, int c)
{
int i, nf, nr;
int o;
chesspiece p;
square s1;
s1 = SQ(f,r);
o = opp(c);
for (i=0;i<8;i++)
{
nf = f+df[i];
nr = r+dr[i];
if (offboardp(nf,nr))
continue;
p = getpiece(nf, nr);
if (!p || (c != chesspiececolor(p)))
{
pushmove(MV(s1, SQ(nf, nr)));
}
}
}
void getsliders(int f, int r, int df, int dr, int color)
{
square s1 = SQ(f,r);
chesspiece p;
for (;;)
{
f += df;
r += dr;
if (offboardp(f,r)) return;
p = getpiece(f,r);
if (p == empty)
pushmove(MV(s1, SQ(f,r)));
else if (chesspiececolor(p)==color)
return;
else
{
pushmove(MV(s1, SQ(f,r)));
return;
}
}
}
void gensliderattacksDEC(square s, int dd, int color)
{
chesspiece p;
square s2 = s;
for (;;)
{
s2 += dd; /* dd should be negative */
if ((s2&001)==0) /* if at RANK 8 then we have looped */
break;
if ((s2&~(077))!=0)
break;
p = getpiece__(s2);
if (p)
{
if (chesspiececolor(p) != color)
{
pushmove(MV(s, s2));
return;
}
return;
}
}
}
void gensliderattacksINC(square s, int dd, int color)
{
chesspiece p;
square s2 = s;
for (;;)
{
s2 += dd;
if ((s2&007)==0) /* if at RANK 1 we have looped */
break;
if ((s2&~(077))!=0)
break;
p = getpiece__(s2);
if (p)
{
if (chesspiececolor(p) != color)
{
pushmove(MV(s, s2));
return;
}
return;
}
}
}
void gensliderattacks(int f, int r, int df, int dr, int color)
{
chesspiece p;
square s1=SQ(f,r);
for (;;)
{
f += df;
r += dr;
if (offboardp (f,r)) return;
p = getpiece(f,r);
if (p)
{
if (chesspiececolor(p) != color)
{
pushmove(MV(s1, SQ(f,r)));
return;
}
return;
}
}
}
void genmoves()
{
int f,r;
int col = tomove();
for (f=0; f<8; f++)
for (r=0; r<8; r++)
{
chesspiece p = getpiece(f,r);
if (p && (chesspiececolor(p) == col))
{
int v = chesspiecevalue(p);
generators[v](f,r,col);
}
}
}
void genattacks()
{
int f,r;
int col = tomove();
for (f=0; f<8; f++)
for (r=0; r<8; r++)
{
chesspiece p = getpiece(f,r);
if (p && (chesspiececolor(p)==col))
{
int v;
v = chesspiecevalue(p);
attackgens[v](f,r,col);
}
}
}
void cmd_board(char *s)
{
int f,r;
for (r=7;r>=0;r--)
{
for (f=0;f<8;f++)
{
chesspiece p=getpiece(f,r);
printf("%c %2d %2d\t", rep(p),
chesspiececolor(p), chesspiecevalue(p));
}
printf("\n");
}
printf("piece counts [%2d %2d]\n", board->piececount[0], board->piececount[1]);
for (f=WPAWN;f<=BKING;f++)
{
printf("%c = %2d\n", rep(f), board->pieces[f]);
}
}
void getmovesk_nocastles(int f, int r, int c)
{
int df, dr, nf, nr;
int o;
chesspiece p;
square s1 = SQ(f,r);
o = opp(c);
for (df=-1;df<2;df++)
for (dr=-1;dr<2;dr++)
{
if (!df && !dr) continue;
nf = f+df;
nr = r+dr;
p = getpiece(nf, nr);
if (!offboardp(nf, nr) && (!p || (c != chesspiececolor(p))))
pushmove(MV(s1, SQ(nf, nr)));
}
}
void getmovesk(int f, int r, int c)
{
int df, dr, nf, nr;
int o;
chesspiece p;
square s1 = SQ(f,r);
o = opp(c);
for (df=-1; df<2; df++)
for (dr=-1; dr<2; dr++)
{
if (!df && !dr) continue;
nf = f+df;
nr = r+dr;
p = getpiece(nf, nr);
if (!offboardp(nf, nr) && (!p || (c != chesspiececolor(p))))
pushmove(MV(s1, SQ(nf, nr)));
}
if (c==WHITE)
{
if (wqcastlep()&&
!getpiece__(D1)&&
!getpiece__(C1)&&
!getpiece__(B1)&&
!incheckp(c)&&
!wouldbeincheckp(THRUWQ))
{
pushmove(WQC);
}
if (wkcastlep()&&
!getpiece__(F1)&&
!getpiece__(G1)&&
!incheckp(c)&&
!wouldbeincheckp(THRUWK))
{
pushmove(WKC);
}
}
else
{
if (bqcastlep()&&
!getpiece__(D8)&&
!getpiece__(C8)&&
!getpiece__(B8)&&
!incheckp(c)&&
!wouldbeincheckp(THRUBQ))
{
pushmove(BQC);
}
if (bkcastlep()&&
!getpiece__(F8)&&
!getpiece__(G8)&&
!incheckp(c)&&
!wouldbeincheckp(THRUBK))
{
pushmove(BKC);
}
}
}
