(* byte → byte ricorsivi *)
ndefinition b8_to_recb8_aux1 : Πn.rec_byte8 〈n,x0〉 → rec_byte8 〈succ_ex n,x0〉 ≝
λn.λrecb:rec_byte8 〈n,x0〉.
- b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (
- b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb))))))))))))))).
+ b8_S 〈n,xF〉 (b8_S 〈n,xE〉 (b8_S 〈n,xD〉 (b8_S 〈n,xC〉 (
+ b8_S 〈n,xB〉 (b8_S 〈n,xA〉 (b8_S 〈n,x9〉 (b8_S 〈n,x8〉 (
+ b8_S 〈n,x7〉 (b8_S 〈n,x6〉 (b8_S 〈n,x5〉 (b8_S 〈n,x4〉 (
+ b8_S 〈n,x3〉 (b8_S 〈n,x2〉 (b8_S 〈n,x1〉 (b8_S 〈n,x0〉 recb))))))))))))))).
(* ... cifra esadecimale superiore *)
nlet rec b8_to_recb8_aux2 (n:exadecim) (r:rec_exadecim n) on r ≝
λn1,n2.λrecb:rec_byte8 〈n1,x0〉.
match n2 return λx.rec_byte8 〈n1,x〉 with
[ x0 ⇒ recb
- | x1 ⇒ b8_S ? recb
- | x2 ⇒ b8_S ? (b8_S ? recb)
- | x3 ⇒ b8_S ? (b8_S ? (b8_S ? recb))
- | x4 ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? recb)))
- | x5 ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb))))
- | x6 ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb)))))
- | x7 ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb))))))
- | x8 ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb)))))))
- | x9 ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb))))))))
- | xA ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb)))))))))
- | xB ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb))))))))))
- | xC ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb)))))))))))
- | xD ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb))))))))))))
- | xE ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb)))))))))))))
- | xF ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb))))))))))))))
+ | x1 ⇒ b8_S 〈n1,x0〉 recb
+ | x2 ⇒ b8_S 〈n1,x1〉 (b8_S 〈n1,x0〉 recb)
+ | x3 ⇒ b8_S 〈n1,x2〉 (b8_S 〈n1,x1〉 (b8_S 〈n1,x0〉 recb))
+ | x4 ⇒ b8_S 〈n1,x3〉 (b8_S 〈n1,x2〉 (b8_S 〈n1,x1〉 (b8_S 〈n1,x0〉 recb)))
+ | x5 ⇒ b8_S 〈n1,x4〉 (b8_S 〈n1,x3〉 (b8_S 〈n1,x2〉 (b8_S 〈n1,x1〉 (
+ b8_S 〈n1,x0〉 recb))))
+ | x6 ⇒ b8_S 〈n1,x5〉 (b8_S 〈n1,x4〉 (b8_S 〈n1,x3〉 (b8_S 〈n1,x2〉 (
+ b8_S 〈n1,x1〉 (b8_S 〈n1,x0〉 recb)))))
+ | x7 ⇒ b8_S 〈n1,x6〉 (b8_S 〈n1,x5〉 (b8_S 〈n1,x4〉 (b8_S 〈n1,x3〉 (
+ b8_S 〈n1,x2〉 (b8_S 〈n1,x1〉 (b8_S 〈n1,x0〉 recb))))))
+ | x8 ⇒ b8_S 〈n1,x7〉 (b8_S 〈n1,x6〉 (b8_S 〈n1,x5〉 (b8_S 〈n1,x4〉 (
+ b8_S 〈n1,x3〉 (b8_S 〈n1,x2〉 (b8_S 〈n1,x1〉 (b8_S 〈n1,x0〉 recb)))))))
+ | x9 ⇒ b8_S 〈n1,x8〉 (b8_S 〈n1,x7〉 (b8_S 〈n1,x6〉 (b8_S 〈n1,x5〉 (
+ b8_S 〈n1,x4〉 (b8_S 〈n1,x3〉 (b8_S 〈n1,x2〉 (b8_S 〈n1,x1〉 (
+ b8_S 〈n1,x0〉 recb))))))))
+ | xA ⇒ b8_S 〈n1,x9〉 (b8_S 〈n1,x8〉 (b8_S 〈n1,x7〉 (b8_S 〈n1,x6〉 (
+ b8_S 〈n1,x5〉 (b8_S 〈n1,x4〉 (b8_S 〈n1,x3〉 (b8_S 〈n1,x2〉 (
+ b8_S 〈n1,x1〉 (b8_S 〈n1,x0〉 recb)))))))))
+ | xB ⇒ b8_S 〈n1,xA〉 (b8_S 〈n1,x9〉 (b8_S 〈n1,x8〉 (b8_S 〈n1,x7〉 (
+ b8_S 〈n1,x6〉 (b8_S 〈n1,x5〉 (b8_S 〈n1,x4〉 (b8_S 〈n1,x3〉 (
+ b8_S 〈n1,x2〉 (b8_S 〈n1,x1〉 (b8_S 〈n1,x0〉 recb))))))))))
+ | xC ⇒ b8_S 〈n1,xB〉 (b8_S 〈n1,xA〉 (b8_S 〈n1,x9〉 (b8_S 〈n1,x8〉 (
+ b8_S 〈n1,x7〉 (b8_S 〈n1,x6〉 (b8_S 〈n1,x5〉 (b8_S 〈n1,x4〉 (
+ b8_S 〈n1,x3〉 (b8_S 〈n1,x2〉 (b8_S 〈n1,x1〉 (b8_S 〈n1,x0〉 recb)))))))))))
+ | xD ⇒ b8_S 〈n1,xC〉 (b8_S 〈n1,xB〉 (b8_S 〈n1,xA〉 (b8_S 〈n1,x9〉 (
+ b8_S 〈n1,x8〉 (b8_S 〈n1,x7〉 (b8_S 〈n1,x6〉 (b8_S 〈n1,x5〉 (
+ b8_S 〈n1,x4〉 (b8_S 〈n1,x3〉 (b8_S 〈n1,x2〉 (b8_S 〈n1,x1〉 (
+ b8_S 〈n1,x0〉 recb))))))))))))
+ | xE ⇒ b8_S 〈n1,xD〉 (b8_S 〈n1,xC〉 (b8_S 〈n1,xB〉 (b8_S 〈n1,xA〉 (
+ b8_S 〈n1,x9〉 (b8_S 〈n1,x8〉 (b8_S 〈n1,x7〉 (b8_S 〈n1,x6〉 (
+ b8_S 〈n1,x5〉 (b8_S 〈n1,x4〉 (b8_S 〈n1,x3〉 (b8_S 〈n1,x2〉 (
+ b8_S 〈n1,x1〉 (b8_S 〈n1,x0〉 recb)))))))))))))
+ | xF ⇒ b8_S 〈n1,xE〉 (b8_S 〈n1,xD〉 (b8_S 〈n1,xC〉 (b8_S 〈n1,xB〉 (
+ b8_S 〈n1,xA〉 (b8_S 〈n1,x9〉 (b8_S 〈n1,x8〉 (b8_S 〈n1,x7〉 (
+ b8_S 〈n1,x6〉 (b8_S 〈n1,x5〉 (b8_S 〈n1,x4〉 (b8_S 〈n1,x3〉 (
+ b8_S 〈n1,x2〉 (b8_S 〈n1,x1〉 (b8_S 〈n1,x0〉 recb))))))))))))))
].
-ndefinition b8_to_recb8 : Πb.rec_byte8 b.
- #b;
- nletin K ≝ (b8_to_recb8_aux3 (b8h b) (b8l b) (b8_to_recb8_aux2 (b8h b) (ex_to_recex (b8h b))));
- nelim b in K:(%) ⊢ %;
- #e1; #e2; nnormalize; #H; napply H.
+(*
+nlemma b8_to_recb8 : Πb.rec_byte8 b.
+ #b; nletin K ≝ (b8_to_recb8_aux3
+ (b8h b) (b8l b) (b8_to_recb8_aux2 (b8h b) (ex_to_recex (b8h b))));
+ ncases b in K; #e1; #e2; #K; napply K;
nqed.
+*)
+
+ndefinition b8_to_recb8 : Πb.rec_byte8 b ≝
+λb.match b with [ mk_byte8 h l ⇒ b8_to_recb8_aux3 h l (b8_to_recb8_aux2 h (ex_to_recex h)) ].
(* ottali → esadecimali *)
ndefinition b8_of_bit ≝