/usr/share/acl2-4.3/books/str/pad.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 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 | ; ACL2 String Library
; Copyright (C) 2009-2010 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 "doc")
(local (include-book "arithmetic"))
(defund rpadchars (x len)
(declare (xargs :guard (and (character-listp x)
(natp len))
:guard-hints (("Goal" :in-theory (enable acl2::repeat))))
(type integer len))
(mbe :logic
(append x (make-list (nfix (- (nfix len) (len x)))
:initial-element #\Space))
:exec
(let* ((x-len (length (the list x)))
(diff (- len x-len)))
(if (> diff 0)
(append x (make-list diff :initial-element #\Space))
x))))
(defthm character-listp-of-rpadchars
(implies (force (character-listp x))
(character-listp (rpadchars x len)))
:hints(("Goal" :in-theory (enable rpadchars))))
(defthm len-of-rpadchars
(equal (len (rpadchars x len))
(max (len x) (nfix len)))
:hints(("Goal" :in-theory (enable rpadchars))))
(defund rpadstr (x len)
":Doc-Section Str
Pad a string to some width by adding whitespace on the right.~/
Example:
~bv[]
(rpadstr \"foo\" 5) --> \"foo \"
~ev[]
This is completely dumb: there's no accounting for newlines or anything, it
just adds however many spaces are needed to reach the desired width. If the
string is already longer than the desired width, it's not changed.~/~/"
(declare (xargs :guard (and (stringp x)
(natp len)))
(type string x)
(type integer len))
(coerce (rpadchars (coerce x 'list) len) 'string))
(defthm stringp-of-rpadstr
(stringp (rpadstr x len))
:rule-classes :type-prescription )
(defthm len-of-coerce-of-rpadstr
(implies (force (stringp x))
(equal (len (coerce (rpadstr x len) 'list))
(max (length x)
(nfix len))))
:hints(("Goal" :in-theory (enable rpadstr))))
(defund lpadchars-aux (x n)
(declare (xargs :guard (and (character-listp x)
(natp n))
:guard-hints (("Goal" :in-theory (enable lpadchars-aux acl2::repeat))))
(type integer n))
(mbe :logic
(append (make-list n :initial-element #\Space)
x)
:exec
(if (= n 0)
x
(lpadchars-aux (cons #\Space x) (- n 1)))))
(defund lpadchars (x len)
(declare (xargs :guard (and (character-listp x)
(natp len))
:guard-hints (("Goal" :in-theory (enable lpadchars-aux))))
(type integer len))
(mbe :logic
(append (make-list (nfix (- (nfix len) (len x)))
:initial-element #\Space)
x)
:exec
(let* ((x-len (length x))
(diff (- len x-len)))
(if (< 0 diff)
(lpadchars-aux x diff)
x))))
(defthm character-listp-of-lpadchars
(implies (force (character-listp x))
(character-listp (lpadchars x len)))
:hints(("Goal" :in-theory (enable lpadchars))))
(defthm len-of-lpadchars
(equal (len (lpadchars x len))
(max (len x) (nfix len)))
:hints(("Goal" :in-theory (enable lpadchars))))
(defund lpadstr (x len)
":Doc-Section Str
Pad a string to some width by adding whitespace on the left.~/
Example:
~bv[]
(lpadstr \"foo\" 5) --> \" foo\"
~ev[]
This is completely dumb: there's no accounting for newlines or anything, it
just adds however many spaces are needed to reach the desired width. If the
string is already longer than the desired width, it's not changed.~/~/"
(declare (xargs :guard (and (stringp x)
(natp len)))
(type string x)
(type integer len))
(coerce (lpadchars (coerce x 'list) len) 'string))
(defthm stringp-of-lpadstr
(stringp (lpadstr x len))
:rule-classes :type-prescription)
(defthm len-of-coerce-of-lpadstr
(implies (force (stringp x))
(equal (len (coerce (lpadstr x len) 'list))
(max (length x)
(nfix len))))
:hints(("Goal" :in-theory (enable lpadstr))))
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