1 files changed, 35 insertions, 0 deletions
diff --git a/src/array.h b/src/array.h
new file mode 100644
index 0000000..75d88d0
--- /dev/null
+++ b/src/array.h
@@ -0,0 +1,35 @@
+#ifndef ARRAY_H
+#define ARRAY_H
+#include <stddef.h>
+
+#define ARRAY_INITIAL_CAPACITY 4
+
+#define array(T) (T *)array_new(sizeof(T))
+
+#define array_append(arr, item) do {               \
+        array_header_t *h = array_get_header(arr); \
+        if (h->capacity < h->length + 1) {         \
+            arr = array_grow(arr);                 \
+		}                                          \
+        arr[h->length++] = item;                   \
+    } while (0)
+
+typedef struct array_header {
+    size_t capacity;
+    size_t item_size;
+    size_t length;
+} array_header_t;
+
+void *
+array_new(size_t item_size);
+
+array_header_t *
+array_get_header(void *arr);
+
+void *
+array_grow(void *arr);
+
+size_t
+array_length(void *arr);
+
+#endif /* ARRAY_H */