some moves dynamic array setup & starting position

1 files changed, 44 insertions, 0 deletions

diff --git a/src/search/moves.c b/src/search/moves.c
new file mode 100644
index 0000000..57797e7
--- /dev/null
+++ b/src/search/moves.c
@@ -0,0 +1,44 @@
+#include "../search.h"
+#include <stdlib.h>
+
+moves_t init_moves() {
+  return init_moves_wcapacity(16);
+}
+
+moves_t init_moves_wcapacity(u32 capacity) {
+  move_t* moves = malloc(capacity * sizeof(*moves));
+  return (moves_t) {
+    .moves = moves,
+    .capacity = capacity,
+    .length = 0,
+  };
+}
+
+moves_t empty_moves() {
+  return (moves_t) {
+    .moves = 0,
+    .capacity = 0,
+    .length = 0,
+  };
+}
+
+int min(int a, int b) {
+  if (a > b) return b;
+  return a;
+}
+
+void add_move(moves_t* moves, square_t from, square_t to) {
+  if (moves->moves == 0) return;
+  if (moves->length + 1 >= moves->capacity) {
+    moves->capacity += min(32, moves->capacity);
+    moves->moves = realloc(
+      moves->moves,
+      moves->capacity * sizeof(*moves->moves)
+    );
+  }
+  moves->moves[moves->length] = (move_t){
+    .from = from,
+    .to = to
+  };
+  moves->length++;
+}