add setters and getters for the board squares using Coord

2 files changed, 29 insertions, 0 deletions

diff --git a/include/board.h b/include/board.h
index 0cfdb70..5fd714a 100644
--- a/include/board.h
+++ b/include/board.h
@@ -6,4 +6,7 @@
 Board board_init();
 int board_delete(Board);
 
+Square board_get_square(Board, Coord);
+Board board_set_square(Board, Coord, Square);
+
 #endif
diff --git a/lib/board.c b/lib/board.c
index 134cfa8..c4a4f2d 100644
--- a/lib/board.c
+++ b/lib/board.c
@@ -84,6 +84,16 @@ static Board _initial_setup(Board b) {
     return _setup_pieces(_setup_colors(b));
 }
 
+static short _from_col(char col) {
+    // col is a character between 'a' and 'h'
+    return col - 'a';
+}
+
+static short _from_row(char row) {
+    // row is an ASCII digit between '1' and '8'
+    return row - '1';
+}
+
 Board board_init() {
     int i, j;
 
@@ -112,3 +122,19 @@ int board_delete(Board b) {
 
     return 0;
 }
+
+Square board_get_square(Board b, Coord c) {
+    short x = _from_col(c.col);
+    short y = _from_row(c.row);
+
+    return b[x][y];
+}
+
+Board board_set_square(Board b, Coord c, Square s) {
+    short x = _from_col(c.col);
+    short y = _from_row(c.row);
+
+    b[x][y] = s;
+
+    return b;
+}