/usr/share/acl2-4.3/books/unicode/read-char.lisp is in acl2-books-source 4.3-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | ;; Processing Unicode Files with ACL2
;; Copyright (C) 2005-2006 by Jared Davis <jared@cs.utexas.edu>
;;
;; This program is free software; you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by the Free
;; Software Foundation; either version 2 of the License, or (at your option)
;; any later version.
;;
;; 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 for
;; more details.
;;
;; You should have received a copy of the GNU General Public License along with
;; this program; if not, write to the Free Software Foundation, Inc., 59 Temple
;; Place - Suite 330, Boston, MA 02111-1307, USA.
(in-package "ACL2")
(local (include-book "tools/mv-nth" :dir :system))
(local (include-book "update-state"))
(local (include-book "open-input-channels"))
; [Removed by Matt K. to handle changes to member, assoc, etc. after ACL2 4.2.]
; (local (defthm assoc-eq-is-assoc-equal
; (equal (assoc-eq a x)
; (assoc-equal a x))))
(defthm read-char$-state
(implies (and (force (state-p1 state))
(force (open-input-channel-p1 channel :character state))
(force (symbolp channel)))
(state-p1 (mv-nth 1 (read-char$ channel state))))
:hints(("Goal" :in-theory (disable statep-functions)
:use ((:instance state-p1
(x state))
(:instance state-p1
(x (mv-nth 1 (read-char$ channel state))))))))
(defthm read-char$-open-input-channel-p1
(implies (and (force (state-p1 state))
(force (open-input-channel-p1 channel :character state))
(force (symbolp channel)))
(open-input-channel-p1 channel
:character
(mv-nth 1 (read-char$ channel state))))
:hints(("Goal" :in-theory (disable statep-functions)
:use ((:instance state-p1
(x state))
(:instance state-p1
(x (mv-nth 1 (read-char$ channel state))))))))
(local (defthmd car-typed-io-list-char
(implies (and (typed-io-listp x :character)
(consp x))
(characterp (car x)))))
(defthm read-char$-character
(implies (and (mv-nth 0 (read-char$ channel state))
(force (state-p1 state))
(force (open-input-channel-p1 channel :character state)))
(characterp (mv-nth 0 (read-char$ channel state))))
:hints(("Goal" :in-theory (disable open-input-channel-p1
open-input-channels)
:use (:instance car-typed-io-list-char
(x (cddr (assoc-equal
channel
(open-input-channels state))))))))
(encapsulate
()
(local (defthm lemma
(implies (and (typed-io-listp x :character)
(not (car x)))
(not (cadr x)))))
(defthm read-char$-after-eof
(implies (and (not (mv-nth 0 (read-char$ channel state)))
(force (state-p state))
(force (symbolp channel))
(force (open-input-channel-p channel :character state)))
(not (mv-nth 0 (read-char$ channel (mv-nth 1 (read-byte$ channel state))))))
:hints(("Goal" :in-theory (e/d (read-char$)
(statep-functions))))))
(in-theory (disable state-p1 open-input-channel-p1 read-char$))
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