* ----------------------------------------------------------------------
* Copyright (c) 1993, 1994, 1995 Matthias Mutz
* Copyright (c) 1999 Michael Vanier and the Free Software Foundation
+ * Copyright (c) 2008, 2013, 2014 Yann Dirson and the Free Software Foundation
*
* GNU SHOGI is based on GNU CHESS
*
inline static void
-Link(short side, short piece,
+Link(short side,
short from, short to, unsigned short local_flag, short s)
{
if (*TrP == TREE)
return false;
}
- /* FIXME: this can be simplified... */
- switch (p)
- {
- case pawn:
-#ifndef MINISHOGI
- case lance:
- case knight:
-#endif
- case silver:
- case bishop:
- case rook:
- return true;
- };
-
- return false;
+ return (typeMask[p] & (T_PAWN|T_LANCE|T_KNIGHT|T_SILVER|T_BISHOP|T_ROOK)) != 0;
}
-inline int
-NonPromotionPossible(short color, short f,
+static inline int
+NonPromotionPossible(short color,
short t, short p)
{
switch (p)
case pawn :
if (color == black)
{
+#ifdef MINISHOGI
+ return ((t < 20)
+#else
return ((t < 72)
+#endif
? true
: (generate_move_flags ? ILLEGAL_TRAPPED : false));
}
else
{
+#ifdef MINISHOGI
+ return ((t > 4)
+#else
return ((t > 8)
+#endif
? true
: (generate_move_flags ? ILLEGAL_TRAPPED : false));
}
/* bonus for possible next moves */
inline static short
-field_bonus(short ply, short side, short piece,
+field_bonus(short side, short piece,
short f, short t, unsigned short *local_flag)
{
short s, u, ptyp;
/* CHECKME: is this right? */
if (((rvupiece == rvuboard) && (upiece == pawn))
- || (upiece == bishop)
-#ifndef MINISHOGI
- || (upiece == knight)
-#endif
+ || typeMask[upiece] & (T_BISHOP | T_KNIGHT)
)
{
s++; /* The opposing pawn (piece) */
if (score_if_impossible < 0)
{
/* The move is flagged as illegal. */
- Link(side, piece,
+ Link(side,
f, t, local_flag, score_if_impossible);
return;
s -= 16 / Captured[side][silver];
#if defined DROPBONUS
- s += field_bonus(ply, side, piece, f, t, &local_flag);
+ s += field_bonus(side, piece, f, t, &local_flag);
if (s == 10 && piece != pawn)
local_flag |= questionable;
{
#ifdef TESUJIBONUS
/* Look at non-promoting silver or knight */
- if (piece == silver
-#ifndef MINISHOGI
- || piece == knight
-#endif
- )
+ if (typeMask[piece] & (T_SILVER | T_KNIGHT))
{
local_flag |= tesuji; /* Non-promotion */
s++;
else
{
#if defined FIELDBONUS
- s += field_bonus(ply, side, piece, f, t, &local_flag);
+ s += field_bonus(side, piece, f, t, &local_flag);
#endif
}
}
if (try_link || GenerateAllMoves)
{
- Link(side, piece, f, t, local_flag,
+ Link(side, f, t, local_flag,
s - ((SCORE_LIMIT + 1000) * 2));
}
LinkMove(ply, sq, u, local_flag | promote, xside, true);
if ((possible
- = NonPromotionPossible(color[sq], sq, u, piece)))
+ = NonPromotionPossible(color[sq], u, piece)))
{
LinkMove(ply, sq, u, local_flag, xside, possible);
}
for (piece = pawn+1; piece <= rook; piece++)
{
- if (
-#ifndef MINISHOGI
- piece == lance ||
-#endif
- piece == bishop || piece == rook)
+ if (typeMask[piece] & (T_LANCE | T_BISHOP | T_ROOK))
{
/* check for threat of xside piece */
ptyp = ptype[side][piece];
if ((PP = PromotionPossible(color[sq], sq, u, piece)))
{
- Link(side, piece,
+ Link(side,
sq, u, capture | promote,
(*value)[stage][board[u]]
#if !defined SAVE_SVALUE
if (!PP || flag.tsume)
{
- Link(side, piece,
+ Link(side,
sq, u, capture,
(*value)[stage][board[u]]
#if !defined SAVE_SVALUE