Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: chez-srfi
Source: https://github.com/arcfide/chez-srfi
Files-Excluded: %3a38/with-shared-structure.ironscheme.sls
Comment:
 The SRFI process declares, since relatively recently, that the
 license of SRFIs shall be the Expat license. Much of the code in
 this project is taken verbatim from SRFI reference implementations.
 .
 All SRFI documents carry a copyright notice and license, typically
 the Expat license, but some reference implementations lack explicit
 notices. Here is how that situation is intended to be interpreted:
 .
 > From: "Arthur A. Gleckler" <srfi@speechcode.com>
 > Date: Sun, 26 Jan 2020 09:47:36 -0800
 > Message-ID: <CALnw4LJtnFmiqqVivw_yYpMApEKY+9JXopfuOK-iqmHp9MzPnA@mail.gmail.com>
 > Subject: Re: SRFI licenses
 > To: "G... Weinholt" <...@weinholt.se>
 > Cc: SRFI Editors <srfi-editors@srfi.schemers.org>
 >
 > On Sun, Jan 26, 2020 at 4:25 AM G... Weinholt <...@weinholt.se> wrote:
 >
 >  In particular I would like to know if, given that a SRFI document
 >  carries this license, is it implied that the reference implementation
 >  also is covered by the same license if there is nothing else written
 >  in the files?
 >
 > Yes, that is the intent.
 >
 > — Arthur A. Gleckler, SRFI Editor
 .
 Please note that the code written by Andrew W. Keep has the license
 text only in the "%3aNN.sls" file, omitting it from the "%3aNN/*"
 files for brevity.

Files: %3a0/*
       %3a1/lists.sls
       %3a2/and-let%2a.sls
       %3a6/basic-string-ports.sls
       %3a6/basic-string-ports.mzscheme.sls
       %3a6/basic-string-ports/compat.ikarus.sls
       %3a6/basic-string-ports/compat.ironscheme.sls
       %3a6/basic-string-ports/compat.larceny.sls
       %3a6/basic-string-ports/compat.ypsilon.sls
       %3a8/receive.sls
       %3a9/records.sls
       %3a11/let-values.sls
       %3a13/strings.sls
       %3a16/case-lambda.sls
       %3a19/time.sls
       %3a19/time/compat.ikarus.sls
       %3a19/time/compat.ironscheme.sls
       %3a19/time/compat.larceny.sls
       %3a19/time/compat.mzscheme.sls
       %3a19/time/compat.ypsilon.sls
       %3a19/time/not-implemented.sls
       %3a23/*
       %3a25/multi-dimensional-arrays.sls
       %3a25/multi-dimensional-arrays/all.sls
       %3a25/multi-dimensional-arrays/arlib.sls
       %3a26/cut.sls
       %3a27/random-bits.sls
       %3a31/rec.sls
       %3a37/args-fold.sls
       %3a38/with-shared-structure.ikarus.sls
       %3a38/with-shared-structure.ypsilon.sls
       %3a39/*
       %3a42/*.sls
       %3a43/vectors.sls
       %3a48/intermediate-format-strings/*.sls
       %3a61/cond.sls
       %3a64/testing.sls
       %3a67/compare-procedures.sls
       %3a78/lightweight-testing.sls
       %3a78/lightweight-testing/*.sls
       %3a98/*.sls
       %3a*.sls
       private/*
       tests/and-let%2a.sps
       tests/compare-procedures.sps
       tests/cut.sps
       tests/eager-comprehensions.sps
       tests/lightweight-testing.sps
       tests/multi-dimensional-arrays--arlib.sps
       tests/multi-dimensional-arrays.sps
       tests/os-environment-variables.sps
       tests/random-bits.sps
       tests/rec.sps
       tests/records.sps
       tests/testing.sps
       tests/time.sps
       compile-all.ikarus.sps
       README.upstream
       .gitignore
Copyright: 2008-2010 Derick Eddington
License: eddington

Files: .github/workflows/ci.yml
Copyright: 2020 Amirouche Boubekki
License: eddington

Files: %3a6/basic-string-ports/compat.chezscheme.sls
       %3a19/time/compat.chezscheme.sls
       %3a38/with-shared-structure.chezscheme.sls
       %3a39/parameters.chezscheme.sls
       %3a48/intermediate-format-strings/compat.chezscheme.sls
       %3a78/lightweight-testing/compat.chezscheme.sls
       %3a98/os-environment-variables.chezscheme.sls
       private/platform-features.chezscheme.sls
       private/include/compat.chezscheme.sls
       tests/intermediate-format-strings.sps
       link-dirs.chezscheme.sps
       README.md
Copyright: 2012 Aaron W. Hsu <arcfide@sacrideo.us>
License: hsu

Files: %3a6/basic-string-ports/compat.loko.sls
       %3a19/time/compat.loko.sls
       tests/char-sets.sps
       private/platform-features.loko.sls
       private/include/compat.loko.sls
Copyright: 2018-2019 Gwen Weinholt
License: Expat

Files: %3a1/srfi-1-reference.scm
Copyright: 1998-1999 Olin Shivers
           2018 Jéssica Milaré
License: shivers

Files: %3a4.sls
       %3a4/numeric-vectors.sls
Copyright: 2018-2020 Andrew W. Keep
License: Expat

Files: %3a5/let.sls
       tests/let.sps
Copyright: 2020 Gwen Weinholt
License: Expat

Files: %3a13/srfi-13.scm
Copyright: 1988-1994 Massachusetts Institute of Technology
           1998-2000 Olin Shivers
License: srfi-13

Files: %3a14/*
Copyright: 2005-2006 Basis Technology Corporation
           1994-2003 Olin Shivers
           2018 Gwen Weinholt
License: BSD-3-Clause

Files: %3a17.sls
       %3a17/*
Copyright: 2018-2020 Andrew W. Keep
License: Expat

Files: %3a19/srfi-19.scm
       %3a19/srfi-19-test-suite.scm
Copyright: 2000-2003 I/NET, Inc.
License: Expat

Files: %3a25/*.scm
Copyright: 2001 Jussi Piitulainen
License: Expat
Comment:
 This is the reference implementation of the SRFI. As per the SRFI
 Editor's statement at the top of this file, it is licensed the same
 as the document: <https://srfi.schemers.org/srfi-25/srfi-25.html>

Files: %3a26/*.scm
Copyright: 2002 Sebastian Egner
License: egner-public-domain
Comment:
 The author's statement in response to inclusion in GNU Kawa:
 https://srfi.schemers.org/srfi-26/mail-archive/msg00077.html
 > I hereby place into the public domain all the code I posted to the
 > SRFI-26 mailing list.
 >
 > (The June 4 message is the one from which the reference implementation
 > was trivially derived.)
 >
 > -al
 .
 It is also the Expat-licensed reference implementation:
 <https://srfi.schemers.org/srfi-26/srfi-26.html>

Files: %3a27/*.scm
Copyright: 2002 Sebastian Egner
License: Expat
Comment:
 This is the reference implementation of the SRFI. As per the SRFI
 Editor's statement at the top of this file, it is licensed the same
 as the document: <https://srfi.schemers.org/srfi-27/srfi-27.html>

Files: %3a28/basic-format-strings.sls
       %3a29/localization.sls
Copyright: 2002 Scott G. Miller
License: Expat

Files: %3a34/exception-handling.sls
       %3a35/conditions.sls
Copyright: 2002 Richard Kelsey, Michael Sperber
License: Expat

Files: %3a37/srfi-37-reference.scm
Copyright: 2002 Anthony Carrico
License: BSD-3-Clause

Files: %3a41/*
Copyright: 2007 Philip L. Bewig
License: Expat

Files: %3a42/*.scm
Copyright: 2003-2007 Sebastian Egner
License: Expat
Comment:
 This is the reference implementation of the SRFI. As per the SRFI
 Editor's statement at the top of this file, it is licensed the same
 as the document: <https://srfi.schemers.org/srfi-42/srfi-42.html>

Files: %3a43/*.scm
Copyright: 2003 Taylor Campbell
License: taylor-public-domain
Comment:
 This is also the Expat-licensed reference implementation:
 <https://srfi.schemers.org/srfi-43/srfi-43.html>

Files: %3a45/*
       tests/lazy.sps
Copyright: 2003 André van Tonder
License: Expat

Files: %3a48/intermediate-format-strings.sls
Copyright: 2003 Kenneth A Dickey
License: Expat

Files: %3a51/*
       %3a54/*
Copyright: 2004 Joo ChurlSoo
License: Expat

Files: %3a60.sls
       %3a60/*
Copyright: 2018-2020 Andrew W. Keep
License: Expat

Files: %3a64/*.scm
Copyright: 2005-2006 Per Bothner
License: Expat

Files: %3a67/*.scm
Copyright: 2005 Sebastian Egner and Jens Axel S{\o}gaard
License: Expat

Files: %3a69/basic-hash-tables.sls
Copyright: 2009 Andreas Rottmann
License: eddington

Files: %3a78/*.scm
Copyright: 2005-2006 Sebastian Egner
License: Expat

Files: %3a98/os-environment-variables.ironscheme.sls
Copyright: 2019 Llewellyn Pritchard
License: BSD-3-Clause
Comment:
 This file is from IronScheme in which everything by default is
 BSD-3-Clause. <https://github.com/IronScheme/IronScheme/blob/master/
 IronScheme/IronScheme.Console/docs/license.txt>

Files: %3a99/*
Copyright: 2008 William D Clinger
License: clinger-joke

Files: %3a111/*
       tests/boxes.sps
Copyright: 2020 Amirouche Boubekki
License: Expat

Files: %3a115/*
       tests/regexp.sps
Copyright: 2013-2016 Alex Shinn
License: BSD-3-Clause

Files: %3a117/*
       tests/list-queues.sps
Copyright: 2015-2016 John Cowan
License: Expat

Files: %3a125/*
Copyright: 2015 William D Clinger
License: clinger-short

Files: %3a126/*
       tests/r6rs-hashtables.*
Copyright: 2015-2016 Taylan Ulrich Bayırlı/Kammer
License: Expat
Comment:
 This is the reference implementation of the SRFI. As per the SRFI
 Editor's statement at the top of this file, it is licensed the same
 as the document: <https://srfi.schemers.org/srfi-42/srfi-42.html>

Files: %3a127/*
       %3a128/*
       %3a129/*
Copyright: 2016 John Cowan
License: Expat

Files: %3a130/*
Copyright: 2016 William D Clinger
License: Expat

Files: %3a131/*
Copyright: 2015 John Cowan, Will Clinger
License: Expat

Files: %3a132/*
Copyright: 1998 Olin Shivers
License: Expat

Files: %3a133/*
Copyright: 2003 Taylor Campbell
           2016 John Cowan
License: Expat

Files: %3a141/*
Copyright: 2010-2011 Taylor R. Campbell
           2015 William D Clinger
License: BSD-2-Clause and clinger-short

Files: %3a143.sls
       %3a143/*
Copyright: 2018-2020 Andrew W. Keep
License: Expat

Files: %3a145.sls
       %3a145/*
Copyright: 2018-2020 Andrew W. Keep
           2016 Marc Nieper-Wißkirchen
License: Expat

Files: %3a151.sls
       %3a151/*
Copyright: 2018-2020 Andrew W. Keep
           2016 John Cowan
License: Expat

Files: tests/bitwise-operations.sps
Copyright: 2017 John Cowan
           2020 Amirouche Boubekki
License: Expat

Files: %3a152/*
Copyright: 1988-1994 Massachusetts Institute of Technology
           1998-2000 Olin Shivers
           2016 John Cowan
           2017 Sudarshan S Chawathe <chaw@eip10.org>
License: srfi-13 and expat

Files: %3a156/*
Copyright: 2017 Panicz Maciej Godek
License: Expat

Files: %3a158/*
Copyright: 2015 Shiro Kawai, John Cowan, Thomas Gilray
License: Expat

Files: %3a175.sls
       tests/ascii.sps
       private/registry-names-update.sps
Copyright: 2019 Lassi Kortela
License: Expat

Files: private/let-opt.sls
Copyright: 1993-2003 Richard Kelsey and Jonathan Rees
           1994-2003 Olin Shivers and Brian D. Carlstrom
           1999-2003 Martin Gasbichler
           2001-2003 Michael Sperber
License: BSD-3-Clause

Files: tests/lists.sps
       tests/vectors.sps
Copyright: 2009-2012 William D Clinger
License: Expat
Comment:
 These tests are copied from the Larceny SRFI tests, namely the files
 lib/SRFI/test/srfi-1-test.sps and lib/SRFI/test/srfi-43-test.sps.
 .
 Larceny itself is not DFSG-free. However, these particular files
 are covered by the statement below.
 .
 > In lib/SRFI, most files include a variation of the standard SRFI
 > copyright notice.  Regardless of the specific wording of copyright
 > notices that may appear in that directory, all authors of the
 > source code in that directory have agreed to the permission notice
 > that is part of the standard SRFI copyright statement, which is
 > found in http://srfi.schemers.org/srfi-process.html:
 >
 >     Copyright (C) AUTHOR (YEAR). All Rights Reserved.
 >
 >     Permission is hereby granted, free of charge, to any
 >     person obtaining a copy of this software and associated
 >     documentation files (the "Software"), to deal in the
 >     Software without restriction, including without limitation
 >     the rights to use, copy, modify, merge, publish, distribute,
 >     sublicense, and/or sell copies of the Software, and to permit
 >     persons to whom the Software is furnished to do so, subject
 >     to the following conditions:
 >
 >     The above copyright notice and this permission notice shall
 >     be included in all copies or substantial portions of the
 >     Software.
 >
 >     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
 >     KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 >     WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 >     PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
 >     OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 >     OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 >     OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 >     SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 .
 Reference: <https://github.com/larcenists/larceny/blob/
 fef550c7d3923deb7a5a1ccd5a628e54cf231c75/COPYRIGHT#L216>

Files: tests/tables-test.*
Copyright: 2015 William D Clinger
License: Expat

Files: private/install/sipp.chezscheme.sls
       tests/test_all.sh
Copyright: 2020 Akce
License: Unlicense

Files: install.chezscheme.sps
Copyright: 2020 Akce
           2012 Aaron W. Hsu <arcfide@sacrideo.us>
License: hsu

Files: debian/*
Copyright: 2020 Gwen Weinholt <weinholt@debian.org>
License: Expat

License: Expat
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the "Software"),
 to deal in the Software without restriction, including without limitation
 the rights to use, copy, modify, merge, publish, distribute, sublicense,
 and/or sell copies of the Software, and to permit persons to whom the
 Software is furnished to do so, subject to the following conditions:
 .
 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 .
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 DEALINGS IN THE SOFTWARE.

License: hsu
 Permission to use, copy, modify, and distribute this software for
 any purpose with or without fee is hereby granted, provided that the
 above copyright notice and this permission notice appear in all
 copies.
 .
 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
 WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
 AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
 OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 PERFORMANCE OF THIS SOFTWARE.

License: clinger-joke
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 .
 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 .
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. REMEMBER, THERE IS NO
 SCHEME UNDERGROUND. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

License: clinger-short
 Permission to copy this software, in whole or in part, to use this
 software for any lawful purpose, and to redistribute this software
 is granted subject to the restriction that all copies made of this
 software must include this copyright and permission notice in full.
 .
 I also request that you send me a copy of any improvements that you
 make to this software so that they may be incorporated within it to
 the benefit of the Scheme community.

License: BSD-2-Clause
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.
 .
 THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 SUCH DAMAGE.

License: BSD-3-Clause
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:
  1. Redistributions of source code must retain the above copyright
     notices, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright
     notices, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
  3. The name of the authors may not be used to endorse or promote products
     derived from this software without specific prior written permission.
  .
  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

License: eddington
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the "Software"),
 to deal in the Software without restriction, including without limitation
 the rights to use, copy, modify, merge, publish, distribute, sublicense,
 and/or sell copies of the Software, and to permit persons to whom the
 Software is furnished to do so, subject to the following conditions:
 .
 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 .
 Except as contained in this notice, the name(s) of the above copyright
 holders shall not be used in advertising or otherwise to promote the sale,
 use or other dealings in this Software without prior written authorization.
 .
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 DEALINGS IN THE SOFTWARE.

License: srfi-13
 Note for the reviewer: copies of SRFI-13 under this license already exist
 in the archive, such as the one in scheme48.
 .
 ;;; The prefix/suffix and comparison routines in this code had (extremely
 ;;; distant) origins in MIT Scheme's string lib, and was substantially
 ;;; reworked by Olin Shivers (shivers@ai.mit.edu) 9/98. As such, it is
 ;;; covered by MIT Scheme's open source copyright. See below for details.
 ;;;
 ;;; The KMP string-search code was influenced by implementations written
 ;;; by Stephen Bevan, Brian Dehneyer and Will Fitzgerald. However, this
 ;;; version was written from scratch by myself.
 ;;;
 ;;; The remainder of this code was written from scratch by myself for scsh.
 ;;; The scsh copyright is a BSD-style open source copyright. See below for
 ;;; details.
 ;;;     -Olin Shivers
 .
 ;;; MIT Scheme copyright terms
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;; This material was developed by the Scheme project at the Massachusetts
 ;;; Institute of Technology, Department of Electrical Engineering and
 ;;; Computer Science.  Permission to copy and modify this software, to
 ;;; redistribute either the original software or a modified version, and
 ;;; to use this software for any purpose is granted, subject to the
 ;;; following restrictions and understandings.
 ;;;
 ;;; 1. Any copy made of this software must include this copyright notice
 ;;; in full.
 ;;;
 ;;; 2. Users of this software agree to make their best efforts (a) to
 ;;; return to the MIT Scheme project any improvements or extensions that
 ;;; they make, so that these may be included in future releases; and (b)
 ;;; to inform MIT of noteworthy uses of this software.
 ;;;
 ;;; 3. All materials developed as a consequence of the use of this
 ;;; software shall duly acknowledge such use, in accordance with the usual
 ;;; standards of acknowledging credit in academic research.
 ;;;
 ;;; 4. MIT has made no warrantee or representation that the operation of
 ;;; this software will be error-free, and MIT is under no obligation to
 ;;; provide any services, by way of maintenance, update, or otherwise.
 ;;;
 ;;; 5. In conjunction with products arising from the use of this material,
 ;;; there shall be no use of the name of the Massachusetts Institute of
 ;;; Technology nor of any adaptation thereof in any advertising,
 ;;; promotional, or sales literature without prior written consent from
 ;;; MIT in each case.
 .
 ;;; Scsh copyright terms
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;; All rights reserved.
 ;;;
 ;;; Redistribution and use in source and binary forms, with or without
 ;;; modification, are permitted provided that the following conditions
 ;;; are met:
 ;;; 1. Redistributions of source code must retain the above copyright
 ;;;    notice, this list of conditions and the following disclaimer.
 ;;; 2. Redistributions in binary form must reproduce the above copyright
 ;;;    notice, this list of conditions and the following disclaimer in the
 ;;;    documentation and/or other materials provided with the distribution.
 ;;; 3. The name of the authors may not be used to endorse or promote products
 ;;;    derived from this software without specific prior written permission.
 ;;;
 ;;; THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
 ;;; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 ;;; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 ;;; IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 ;;; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 ;;; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ;;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ;;; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ;;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 ;;; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

License: shivers
 You may do as you please with this code as long as you do not remove
 this copyright notice or hold me liable for its use. Please send bug
 reports to shivers@ai.mit.edu.

License: egner-public-domain
 Sebastian.Egner@philips.com, 5-Jun-2002.
 adapted from the posting by Al Petrofsky <al@petrofsky.org>
 placed in the public domain

License: taylor-public-domain
 Taylor Campbell wrote this code; he places it in the public domain.
 Will Clinger [wdc] made some corrections, also in the public domain.

License: Unlicense
 This is free and unencumbered software released into the public domain.
 .
 Anyone is free to copy, modify, publish, use, compile, sell, or
 distribute this software, either in source code form or as a compiled
 binary, for any purpose, commercial or non-commercial, and by any
 means.
 .
 In jurisdictions that recognize copyright laws, the author or authors
 of this software dedicate any and all copyright interest in the
 software to the public domain. We make this dedication for the benefit
 of the public at large and to the detriment of our heirs and
 successors. We intend this dedication to be an overt act of
 relinquishment in perpetuity of all present and future rights to this
 software under copyright law.
 .
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 OTHER DEALINGS IN THE SOFTWARE.
 .
 For more information, please refer to <http://unlicense.org/>
