/usr/share/acl2-6.3/books/str/substrp.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.
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 | ; ACL2 String Library
; Copyright (C) 2009-2013 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>
(in-package "STR")
(include-book "strpos")
(local (include-book "arithmetic"))
(defsection substrp
:parents (substrings)
:short "Case-sensitive test for the existence of a substring."
:long "<p>@(call substrp) determines if x ever occurs as a substring of y.
The test is case-sensitive.</p>
<p>See also @(see isubstrp) for a case-insensitive version, and @(see strpos)
or @(see strrpos) for alternatives that say where a match occurs.</p>"
(definline substrp (x y)
(declare (type string x y))
(mbe :logic (sublistp (explode x) (explode y))
:exec (if (strpos x y)
t
nil)))
(defcong streqv equal (substrp x y) 1)
(defcong streqv equal (substrp x y) 2))
|