first commit

src/utils/defs.h

@@ -0,0 +1,17 @@
+#include <assert.h>
+
+#ifndef MAX
+#define MAX(x, y) ((x) > (y) ? (x) : (y))
+#endif
+
+#ifndef MIN
+#define MIN(x, y) ((x) < (y) ? (x) : (y))
+#endif
+
+#ifndef NULL
+#define NULL ((void*) 0)
+#endif
+
+#define UNREACHABLE assert(0);
+
+#define membersizeof(type, member) (sizeof(((type*) 0)->member))