move prompt + help

src/chess.c

@@ -1,3 +1,4 @@
+#include <stdio.h>
 #include "chess.h"
 #include "util.h"
 
@@ -22,7 +23,49 @@ void select_player(player_e *player, unsigned int round_count) {
     }
 }
 
-bool get_move(move_t *move);
+void show_help() {
+    puts(
+        "movement help:\n\
+        there is a prompt asking for where to move a piece every turn\n\
+        format: e.g. you want to move a knight from b1 to a3:\n\
+        you'd type -> b1 a3 <- (without the arrows)\n"
+    );
+}
+
+// returns false if the numbers of letters are out of bounds
+bool is_move_in_bounds(move_t move) {
+    if (
+        is_int_in_range(move.from.x, 0, 7) &&
+        is_int_in_range(move.from.y, 0, 7) &&
+        is_int_in_range(move.to.x, 0, 7) &&
+        is_int_in_range(move.to.y, 0, 7)
+    ) {
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool get_move(move_t *move) {
+    clear_stdin();
+    
+    char _x_from, _x_to;
+    int _y_from, _y_to;
+    scanf("%c%d %c%d", 
+        &_x_from,
+        &_y_from,
+        &_x_to,
+        &_y_to
+    );
+
+    move->from.x = _x_from-96-1; // char to int conversion
+    move->from.y = _y_from-1;
+
+    move->to.x = _x_to-96-1;
+    move->to.y = _y_to-1;
+
+    return is_move_in_bounds(*move);
+}
 
 bool perform_move(player_e player, move_t move);