Add common way to access bit ranges, log all NVMe devices on startup

src/lib/util.h

@@ -4,6 +4,10 @@
 
 #define NUL 0 // TODO Fix VSCode thinking `NULL` conflicts with some other definition.
 
+#define ONES(h, l) ((1ULL << ((h) - (l) + 1)) - 1)
+#define BITS_R(s, h, l) (((s) >> (l)) & ONES(h, l))
+#define BITS_W(s, h, l, v) ((s) = (__typeof__(s))(((s) & ~(ONES(h, l) << (l))) | (((v) & ONES(h, l)) << (l))))
+
 #define STDIN 0
 #define STDOUT 1
 #define STDERR 2