1.1 --- a/src/rules/pawn.c Wed Mar 26 14:12:59 2014 +0100
1.2 +++ b/src/rules/pawn.c Wed Mar 26 14:53:15 2014 +0100
1.3 @@ -30,28 +30,44 @@
1.4 #include "pawn.h"
1.5
1.6 _Bool pawn_chkrules(Board board, Move *move) {
1.7 - // TODO: implement
1.8 - return TRUE;
1.9 + int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1);
1.10 + if (move->capture) {
1.11 + if (move->fromrow == move->torow + d && (
1.12 + move->fromfile == move->tofile + 1 ||
1.13 + move->fromfile == move->tofile - 1)) {
1.14 + // TODO: en passant
1.15 + return mdst(board,move) != 0; /* color has been checked */
1.16 + } else {
1.17 + return FALSE;
1.18 + }
1.19 + } else {
1.20 + if (move->fromfile == move->tofile) {
1.21 + return (move->fromrow == move->torow + d) ||
1.22 + (move->fromrow == (d < 0 ? 1 : 6) && /* advanced first move */
1.23 + move->fromrow == move->torow + d*2);
1.24 + } else {
1.25 + return FALSE;
1.26 + }
1.27 + }
1.28 }
1.29
1.30 _Bool pawn_isblocked(Board board, Move *move) {
1.31 - // TODO: implement
1.32 - return FALSE;
1.33 + return mdst(board,move) && !move->capture;
1.34 }
1.35
1.36 _Bool pawn_getlocation(Board board, Move *move) {
1.37 int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1);
1.38
1.39 - // TODO: battle moves
1.40 -
1.41 - move->fromfile = move->tofile;
1.42 + if (move->fromfile == POS_UNSPECIFIED) {
1.43 + move->fromfile = move->tofile;
1.44 + }
1.45 move->fromrow = move->torow + d;
1.46 if (move->fromrow > 6) {
1.47 return FALSE;
1.48 } else {
1.49 /* advanced first move */
1.50 if (move->fromrow == (d < 0 ? 2 : 5) &&
1.51 - board[move->fromrow][move->fromfile] != move->piece) {
1.52 + msrc(board,move) != move->piece) {
1.53
1.54 move->fromrow += d;
1.55 if (move->fromrow > 6) {
