util: refactor misc utility stuff

kernel/util.c

@@ -0,0 +1,29 @@
+/* See the end of this file for copyright and license terms. */
+
+#include <gay/types.h>
+#include <gay/util.h>
+
+void *ptr_align(void *ptr, int log)
+{
+	uintptr_t shifted = 1 << abs(log);
+	uintptr_t aligned = (uintptr_t)ptr & ~(shifted - 1);
+
+	if (log > 0 && aligned != (uintptr_t)ptr)
+		aligned += shifted;
+
+	return (void *)aligned;
+}
+
+/*
+ * This file is part of GayBSD.
+ * Copyright (c) 2021 fef <owo@fef.moe>.
+ *
+ * GayBSD is nonviolent software: you may only use, redistribute, and/or
+ * modify it under the terms of the Cooperative Nonviolent Public License
+ * (CNPL) as found in the LICENSE file in the source code root directory
+ * or at <https://git.pixie.town/thufie/npl-builder>; either version 7
+ * of the license, or (at your option) any later version.
+ *
+ * GayBSD comes with ABSOLUTELY NO WARRANTY, to the extent
+ * permitted by applicable law.  See the CNPL for details.
+ */