/usr/share/acl2-6.3/books/xdoc/fmt-to-str.lisp is in acl2-books-source 6.3-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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; Copyright (C) 2009-2011 Centaur Technology
;
; Contact:
; Centaur Technology Formal Verification Group
; 7600-C N. Capital of Texas Highway, Suite 300, Austin, TX 78731, USA.
; http://www.centtech.com/
;
; 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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
;
; Original author: Jared Davis <jared@centtech.com>
; fmt-to-str.lisp -- alternative to fmt-to-string with narrower margins
; and downcased symbols
(in-package "XDOC")
(include-book "tools/bstar" :dir :system)
(set-state-ok t)
(program)
(defun fmt-to-str (x base-pkg state)
; Use ACL2's fancy new string-printing stuff to pretty-print an object into a
; string.
(b* ((hard-right-margin (f-get-global 'acl2::fmt-hard-right-margin state))
(soft-right-margin (f-get-global 'acl2::fmt-soft-right-margin state))
(print-case (f-get-global 'acl2::print-case state))
(pkg (current-package state))
(state (set-fmt-hard-right-margin 68 state))
(state (set-fmt-soft-right-margin 62 state))
(state (set-print-case :downcase state))
((mv er ?val state) (acl2::in-package-fn (symbol-package-name base-pkg) state))
((when er)
(er hard? 'fmt-to-str "Error switching to package ~x0~%"
(symbol-package-name base-pkg))
(mv "" state))
((mv channel state) (open-output-channel :string :character state))
((mv & state) (fmt1 "~x0" (list (cons #\0 x)) 0 channel state nil))
((mv er str state) (get-output-stream-string$ channel state))
((when er)
(er hard? 'fmt-to-str "Error with get-output-stream-string$???")
(mv "" state))
((mv er ?val state) (acl2::in-package-fn pkg state))
((when er)
(er hard? 'fmt-to-str "Error switching back to package ~x0~%" pkg)
(mv "" state))
(state (set-fmt-hard-right-margin hard-right-margin state))
(state (set-fmt-soft-right-margin soft-right-margin state))
(state (set-print-case print-case state)))
(mv str state)))
(defun simple-html-encode-str (x n xl acc)
; Revappend the HTML encoding of X (e.g., & --> &) onto ACC.
(b* (((when (int= n xl))
acc)
(char1 (char x n))
(acc (case char1
(#\< (list* #\; #\t #\l #\& acc)) ;; "<" (in reverse)
(#\> (list* #\; #\t #\g #\& acc)) ;; ">"
(#\& (list* #\; #\p #\m #\a #\& acc)) ;; "&"
(#\" (list* #\; #\t #\o #\u #\q #\& acc)) ;; """
(t (cons char1 acc)))))
(simple-html-encode-str x (+ 1 n) xl acc)))
(defun fmt-and-encode-to-acc (x base-pkg state acc)
;; Basic encoding of sexprs with no autolinking.
(b* (((mv str state) (fmt-to-str x base-pkg state))
(acc (simple-html-encode-str str 0 (length str) acc)))
(mv acc state)))
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