diff --git a/src/include/marr.h b/src/include/marr.h
new file mode 100644
index 0000000..6f82073
--- /dev/null
+++ b/src/include/marr.h
@@ -0,0 +1,43 @@
+#ifndef _H_MARR
+#define _H_MARR
+
+#include <stddef.h>
+
+#define MARR_DEFAULT_CAP 32
+
+typedef struct marr_da_s {
+    void* data;
+    size_t cap;
+    size_t len;
+    size_t stride;
+} marr_da_t;
+
+marr_da_t* _marr_new(size_t stride, size_t cap);
+int _marr_push_front(marr_da_t* da, void* val);
+int _marr_push_back(marr_da_t* da, void* val);
+int _marr_pop_front(marr_da_t* da, void* dest);
+int _marr_pop_back(marr_da_t* da, void* dest);
+int _marr_append(marr_da_t* to, marr_da_t* from);
+int _marr_resize(marr_da_t* da, size_t new_cap);
+int _marr_remove(marr_da_t* da, size_t idx);
+bool _marr_contains(marr_da_t* da, void* val);
+bool _marr_map(marr_da_t* da, marr_da_t* da_out, bool (*func)(void* item, void* data), void* data);
+
+#define marr_new(type) (type*)_marr_new(sizeof(type), MARR_DEFAULT_CAP);
+#define marr_new_with_capacity(type, cap) (type*)_marr_new(sizeof(type), cap);
+#define marr_push_front(da, val) _marr_push_front((marr_da_t)da, val);
+#define marr_push_back(da, val) _marr_push_back((marr_da_t)da, val);
+#define marr_pop_front(da, dest) _marr_pop_front((marr_da_t)da, dest);
+#define marr_pop_back(da, dest) _marr_pop_back((marr_da_t)da, dest);
+#define marr_append(to, from) _marr_append((marr_da_t)to, (marr_da_t)from);
+#define marr_resize(da, new_size) _marr_resize((marr_da_t)da, new_size);
+#define marr_remove(da, idx) _marr_remove((marr_da_t)da, idx);
+#define marr_contains(da, val) _marr_contains((marr_da_t)da, val);
+#define marr_map(da, da_out, fnc, data) _marr_map((marr_da_t)da, (marr_da_t)da_out, fnc, data);
+
+#define marr_len(da) (((marr_da_t*)(da))->len)
+#define marr_cap(da) (((marr_da_t*)(da))->cap)
+#define marr_stride(da) (((marr_da_t*)(da))->stride)
+#define marr_as_ptr(type, da) (type*)(((marr_da_t*)(da))->data)
+
+#endif // !_H_MARR
diff --git a/src/marr.c b/src/marr.c
new file mode 100644
index 0000000..e2b587a
--- /dev/null
+++ b/src/marr.c
@@ -0,0 +1,35 @@
+#include <marr.h>
+#include <stdlib.h>
+
+marr_da_t* _marr_new(size_t stride, size_t cap) {
+    marr_da_t* da = malloc(sizeof(marr_da_t));
+    da->data = malloc(stride * cap);
+    if (!da->data) {
+        return NULL;
+    }
+    da->cap = cap;
+    da->len = 0;
+    return da;
+}
+
+int _marr_push_front(marr_da_t* da, void* val) {}
+
+int _marr_push_back(marr_da_t* da, void* val);
+int _marr_pop_front(marr_da_t* da, void* dest);
+int _marr_pop_back(marr_da_t* da, void* dest);
+int _marr_append(marr_da_t* to, marr_da_t* from);
+
+int _marr_resize(marr_da_t* da, size_t new_cap) {
+    if (new_cap <= da->cap) {
+        return 1;
+    }
+    da->data = realloc(da->data, new_cap * da->stride);
+    if (!da->data) {
+        return 1;
+    }
+    return 0;
+}
+
+int _marr_remove(marr_da_t* da, size_t idx);
+bool _marr_contains(marr_da_t* da, void* val);
+bool _marr_map(marr_da_t* da, marr_da_t* da_out, bool (*func)(void* item, void* data), void* data);