added solving logic

toh_solver.c

@@ -27,8 +27,19 @@
  * @param target The rod to which the disk shall be moved.
  * @return True if the move was successful and according to the rules, false otherwise.
  */
-static bool ts_move_disk(Rod source, Rod target) {
+static bool ts_move_disk(RodName source, RodName target) {
+    TohBoard board = tb_get_board();
+    if (!tb_is_valid(board)) {
         return false;
+    }
+
+    Disk disk = tb_pop_disk(board, source);
+
+    if (!td_is_valid(disk)) {
+        return false;
+    }
+
+    return tb_push_disk(tb_get_board(), target, disk);
 }
 
 /**
@@ -43,8 +54,39 @@ static bool ts_move_disk(Rod source, Rod target) {
  * @param target The rod to which the disks shall be moved.
  * @return True if the move was successful and according to the rules, false otherwise.
  */
-static bool ts_move_stack(unsigned short size, Rod source, Rod intermediate, Rod target) {
+static bool ts_move_stack(unsigned short size, RodName source, RodName intermediate, RodName target) {
+    // inefficient implementation as it makes lots of unnecessary moves, if the number of disks is large
+    // but it's easier to implement
+    if (size == 1) {
+        return ts_move_disk(source, target);
+    }
+    
+    if (!ts_move_stack(size - 1, source, target, intermediate)) {
         return false;
+    }
+    
+    if (!ts_move_disk(source, target)) {
+        return false;
+    }
+    
+    return ts_move_stack(size - 1, intermediate, source, target);
+}
+
+static unsigned short ts_get_used_disks(RodName rod) {
+    TohBoard board = tb_get_board();
+    if (!tb_is_valid(board)) {
+        return 0;
+    }
+
+    unsigned short count = 0;
+    for (unsigned short i = 0; i < MAX_DISKS; i++) {
+        Disk disk = tb_get_disk(board, rod, i);
+        if (td_is_valid(disk)) {
+            count++;
+        }
+    }
+
+    return count;
 }
 
 /* ========================================================= */
@@ -81,5 +123,10 @@ void ts_init(unsigned short disk_count) {
  * 
  */
 void ts_solve() {
+    TohBoard board = tb_get_board();
+    if (!tb_is_valid(board)) {
         return;
+    }
+
+    ts_move_stack(ts_get_used_disks(LEFT), LEFT, MIDDLE, RIGHT);
 }