1 files changed, 33 insertions, 0 deletions
diff --git a/common/dyn_arr.h b/common/dyn_arr.h
new file mode 100644
index 0000000..85e6c15
--- /dev/null
+++ b/common/dyn_arr.h
@@ -0,0 +1,33 @@
+#ifndef __MICRO_VEC_H__
+#define __MICRO_VEC_H__
+
+#include "common.h"
+
+#define DA_MIN_CAP 8
+#define DA_GROW_RATE 2
+
+#define da_create(T, init_capacity) \
+        ((T*)_da_create(sizeof(T), init_capacity))
+
+#define da_len_ptr(arr) ((int*)arr - 2)
+#define da_len(arr) (*da_len_ptr(arr))
+
+#define da_cap_ptr(arr) ((int*)arr - 1)
+#define da_cap(arr) (*da_cap_ptr(arr))
+
+#define da_base(arr) ((void*)da_len_ptr(arr))
+
+#define da_append_slot(T, arr) \
+        ((T*)_da_append_slot(sizeof(T), (void**)arr))
+
+#define da_append(T, arr, elem) \
+        (*da_append_slot(T, arr) = elem)
+
+#define da_clear(arr) \
+        (*da_len_ptr(arr) = 0)
+
+void *_da_create(size_t type_size, int init_cap);
+void *_da_append_slot(size_t type_size, void **arr);
+void da_free(void *arr);
+
+#endif // __MICRO_VEC_H__