Initial implementation

vec.c

@@ -0,0 +1,38 @@
+/* Copyright (C) 2025 Aryadev Chavali
+
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License Version 2 for
+ * details.
+
+ * You may distribute and modify this code under the terms of the GNU General
+ * Public License Version 2, which you should have received a copy of along with
+ * this program.  If not, please go to <https://www.gnu.org/licenses/>.
+
+ * Created: 2025-04-15
+ * Description: Vector implementation
+ */
+
+#include "./vec.h"
+
+#include <malloc.h>
+#include <string.h>
+
+void vec_reserve(arena_t *allocator, vec_t *vec, u32 size)
+{
+  if (vec->cap - vec->size < size)
+  {
+    u32 old_cap = vec->cap;
+    vec->cap    = MAX(vec->cap * 1.5, vec->size + size);
+    vec->data   = arena_realloc(allocator, vec->data, old_cap, vec->cap);
+  }
+}
+
+u32 vec_append(arena_t *allocator, vec_t *vec, const void *data, u32 size)
+{
+  vec_reserve(allocator, vec, size);
+  memcpy(vec->data + vec->size, data, size);
+  u32 ptr = vec->size;
+  vec->size += size;
+  return ptr;
+}