1 files changed, 27 insertions, 0 deletions
diff --git a/src/std/vec.c b/src/std/vec.c
new file mode 100644
index 0000000..077e64a
--- /dev/null
+++ b/src/std/vec.c
@@ -0,0 +1,27 @@
+#include <string.h>
+
+#include "assert.h"
+#include "types.h"
+#include "vec.h"
+
+Vec _Vec_new(Arena *a, size tsize, size cap, size align) {
+    assert(cap > 0, "negative cap");
+    Vec v = {0};
+    v.tsize = tsize;
+    v.cap = cap;
+    v.align = align;
+    v.len = 0;
+    v.data = alloc(a, cap, tsize, align);
+    return v;
+}
+
+void Vec_push(Arena *a, Vec *v, void *data) {
+    if (v->len == v->cap) {
+        void *cpy = alloc(a, v->cap * 2, v->tsize, v->align);
+        memcpy(cpy, v->data, v->len * v->tsize);
+        v->cap *= 2;
+        v->data = cpy;
+    }
+    memcpy(v->data + v->len * v->tsize, data, v->tsize);
+    v->len++;
+}