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move_do_alt: use &state (as move_do)

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Bruno Raoult
2024-06-17 07:37:22 +02:00
parent 2fbad1319e
commit e61e1518f4
2 changed files with 12 additions and 8 deletions
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15
src/move-do.c
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@@ -101,7 +101,7 @@ pos_t *move_do(pos_t *pos, const move_t move, state_t *state)
} else if (ptype == PAWN) { /* pawn non capture or e.p. */
pos->clock_50 = 0;
if (from + up + up == to) { /* if pawn double push, set e.p. */
square_t ep = from + up;;
square_t ep = from + up;
if (bb_pawn_attacks[us][ep] & pos->bb[them][PAWN]) {
pos->en_passant = ep;
key ^= zobrist_ep[EP_ZOBRIST_IDX(pos->en_passant)];
@@ -215,7 +215,7 @@ pos_t *move_undo(pos_t *pos, const move_t move, const state_t *state)
/**
* move_{do,undo}_alt - alternative move_do/move_undo (to experiment)
*/
pos_t *move_do_alt(pos_t *pos, const move_t move) //, state_t *state)
pos_t *move_do_alt(pos_t *pos, const move_t move, state_t *state)
{
color_t us = pos->turn, them = OPPONENT(us);
square_t from = move_from(move), to = move_to(move);
@@ -226,6 +226,8 @@ pos_t *move_do_alt(pos_t *pos, const move_t move) //, state_t *state)
int up = sq_up(us);
hkey_t key = pos->key;
*state = pos->state; /* save irreversible changes */
/* update key: switch turn, reset castling and ep */
key ^= zobrist_turn;
key ^= zobrist_castling[pos->castle];
@@ -267,14 +269,15 @@ pos_t *move_do_alt(pos_t *pos, const move_t move) //, state_t *state)
} else if (ptype == PAWN) { /* pawn non capture or e.p. */
pos->clock_50 = 0;
if (from + up + up == to) { /* if pawn double push, set e.p. */
square_t ep = from + up;;
square_t ep = from + up;
if (bb_pawn_attacks[us][ep] & pos->bb[them][PAWN]) {
pos->en_passant = ep;
key ^= zobrist_ep[EP_ZOBRIST_IDX(pos->en_passant)];
}
} else if (is_enpassant(move)) { /* clear grabbed pawn */
square_t grabbed = to - up;
key ^= zobrist_pieces[pos->board[grabbed]][grabbed];
piece_t pc = pos->board[grabbed];
key ^= zobrist_pieces[pc][grabbed];
pos_clr_sq(pos, grabbed);
}
}
@@ -321,7 +324,7 @@ pos_t *move_do_alt(pos_t *pos, const move_t move) //, state_t *state)
return pos;
}
pos_t *move_undo_alt(pos_t *pos, const move_t move)
pos_t *move_undo_alt(pos_t *pos, const move_t move, const state_t *state)
{
color_t them = pos->turn, us = OPPONENT(them);
square_t from = move_from(move), to = move_to(move);
@@ -355,7 +358,7 @@ pos_t *move_undo_alt(pos_t *pos, const move_t move)
pos_set_sq(pos, grabbed, MAKE_PIECE(PAWN, them));
}
//pos->state = *state; /* restore irreversible changes */
pos->state = *state; /* restore irreversible changes */
pos->turn = us;
return pos;
}

5
src/move-do.h
View File

@@ -19,7 +19,8 @@
pos_t *move_do(pos_t *pos, const move_t move, state_t *state);
pos_t *move_undo(pos_t *pos, const move_t move, const state_t *state);
pos_t *move_do_alt(pos_t *pos, const move_t move);//, state_t *state);
pos_t *move_undo_alt(pos_t *pos, const move_t move);//, const state_t *state);
/* new version testing */
pos_t *move_do_alt(pos_t *pos, const move_t move, state_t *state);
pos_t *move_undo_alt(pos_t *pos, const move_t move, const state_t *state);
#endif /* MOVE_DO_H */