Mercurial > hg > terminal-chess / file comparison
comparison: src/chess/knight.c
src/chess/knight.c
- changeset 169
- 9962f5d98764
- parent 163
- 2a6d83f4677e
- child 170
- bde99d803caf
equal
deleted
inserted
replaced
| 168:663676cfef6e | 169:9962f5d98764 |
|---|---|
| 35 int dx = abs(move->fromfile - move->tofile); | 35 int dx = abs(move->fromfile - move->tofile); |
| 36 int dy = abs(move->fromrow - move->torow); | 36 int dy = abs(move->fromrow - move->torow); |
| 37 | 37 |
| 38 return (dx == 2 && dy == 1) || (dx == 1 && dy == 2); | 38 return (dx == 2 && dy == 1) || (dx == 1 && dy == 2); |
| 39 } | 39 } |
| 40 | |
| 41 size_t knight_moves(GameState *gamestate, Color c, Row r, File f, Move *moves) { | |
| 42 | |
| 43 size_t count = 0; | |
| 44 const int offsets[8][2] = { | |
| 45 { 2, 1}, | |
| 46 { 2, -1}, | |
| 47 {-2, 1}, | |
| 48 {-2, -1}, | |
| 49 { 1, 2}, | |
| 50 { 1, -2}, | |
| 51 {-1, 2}, | |
| 52 {-1, -2} | |
| 53 }; | |
| 54 | |
| 55 for (size_t i = 0 ; i < 8 ; i++) { | |
| 56 int row = r + offsets[i][0]; | |
| 57 int file = f + offsets[i][1]; | |
| 58 | |
| 59 if (isidx(row) && isidx(file)) { | |
| 60 moves[count] = (Move){0}; | |
| 61 moves[count].piece = mkpiece(KNIGHT, c); | |
| 62 moves[count].fromrow = r; | |
| 63 moves[count].fromfile = f; | |
| 64 moves[count].torow = row; | |
| 65 moves[count].tofile = file; | |
| 66 moves[count].capture = piece_at(gamestate, row, file) != 0; | |
| 67 count++; | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 return count; | |
| 72 } |
