Some libraries written for, or converted to run in, R7RS Scheme. https://peterlane.codeberg.page/r7rs-libs/
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README.adoc

= R7RS Libraries


Some libraries written for, or converted to run in, R7RS Scheme.

Information and downloads at: https://peterlane.codeberg.page/r7rs-libs

* Requires:
** R7RS-large bitwise, comparator, hash-table, list and sort
** SRFIs 27, 64 and 152 (or 13).

* Tested against:
** Gauche 0.9.11: https://practical-scheme.net/gauche/
** Kawa 3.1.1: https://www.gnu.org/software/kawa/
** Sagittarius 0.9.8: https://bitbucket.org/ktakashi/sagittarius-scheme/wiki/Home

== Contents

nltk:: A repackaging of the https://sourceforge.net/projects/snltk/[Natural Language ToolKit], originally written for R6RS Scheme.
pfds:: A repackaging of https://github.com/ijp/pfds[Purely Functional Data Structures], originally written for R6RS Scheme.
rebottled:: A repackaging of some smaller libraries, containing a single or few files, ported from various sources.
robin:: A set of libraries written by myself for R7RS Scheme.
slib:: http://people.csail.mit.edu/jaffer/SLIB[SLIB] is a long-established library containing around 30,000 lines of Scheme code, working with many Scheme implementations. The version here repackages as much of SLIB (version 3b5) as possible into reusable R7RS libraries, and includes many tests and examples.

There are also some supporting SRFIs, libraries for Kawa and Sagittarius.

== Licences

=== NLTK

GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007

Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.


This version of the GNU Lesser General Public License incorporates
the terms and conditions of version 3 of the GNU General Public
License, supplemented by the additional permissions listed below.

0. Additional Definitions.

As used herein, "this License" refers to version 3 of the GNU Lesser
General Public License, and the "GNU GPL" refers to version 3 of the GNU
General Public License.

"The Library" refers to a covered work governed by this License,
other than an Application or a Combined Work as defined below.

An "Application" is any work that makes use of an interface provided
by the Library, but which is not otherwise based on the Library.
Defining a subclass of a class defined by the Library is deemed a mode
of using an interface provided by the Library.

A "Combined Work" is a work produced by combining or linking an
Application with the Library. The particular version of the Library
with which the Combined Work was made is also called the "Linked
Version".

The "Minimal Corresponding Source" for a Combined Work means the
Corresponding Source for the Combined Work, excluding any source code
for portions of the Combined Work that, considered in isolation, are
based on the Application, and not on the Linked Version.

The "Corresponding Application Code" for a Combined Work means the
object code and/or source code for the Application, including any data
and utility programs needed for reproducing the Combined Work from the
Application, but excluding the System Libraries of the Combined Work.

1. Exception to Section 3 of the GNU GPL.

You may convey a covered work under sections 3 and 4 of this License
without being bound by section 3 of the GNU GPL.

2. Conveying Modified Versions.

If you modify a copy of the Library, and, in your modifications, a
facility refers to a function or data to be supplied by an Application
that uses the facility (other than as an argument passed when the
facility is invoked), then you may convey a copy of the modified
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a) under this License, provided that you make a good faith effort to
ensure that, in the event an Application does not supply the
function or data, the facility still operates, and performs
whatever part of its purpose remains meaningful, or

b) under the GNU GPL, with none of the additional permissions of
this License applicable to that copy.

3. Object Code Incorporating Material from Library Header Files.

The object code form of an Application may incorporate material from
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a) Give prominent notice with each copy of the object code that the
Library is used in it and that the Library and its use are
covered by this License.

b) Accompany the object code with a copy of the GNU GPL and this license
document.

4. Combined Works.

You may convey a Combined Work under terms of your choice that,
taken together, effectively do not restrict modification of the
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b) Accompany the Combined Work with a copy of the GNU GPL and this license
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these notices, as well as a reference directing the user to the
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License, and the Corresponding Application Code in a form
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Corresponding Source.

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you use option 4d0, the Installation Information must accompany
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Code. If you use option 4d1, you must provide the Installation
Information in the manner specified by section 6 of the GNU GPL
for conveying Corresponding Source.)

5. Combined Libraries.

You may place library facilities that are a work based on the
Library side by side in a single library together with other library
facilities that are not Applications and are not covered by this
License, and convey such a combined library under terms of your
choice, if you do both of the following:

a) Accompany the combined library with a copy of the same work based
on the Library, uncombined with any other library facilities,
conveyed under the terms of this License.

b) Give prominent notice with the combined library that part of it
is a work based on the Library, and explaining where to find the
accompanying uncombined form of the same work.

6. Revised Versions of the GNU Lesser General Public License.

The Free Software Foundation may publish revised and/or new versions
of the GNU Lesser General Public License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.

Each version is given a distinguishing version number. If the
Library as you received it specifies that a certain numbered version
of the GNU Lesser General Public License "or any later version"
applies to it, you have the option of following the terms and
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received it does not specify a version number of the GNU Lesser
General Public License, you may choose any version of the GNU Lesser
General Public License ever published by the Free Software Foundation.

If the Library as you received it specifies that a proxy can decide
whether future versions of the GNU Lesser General Public License shall
apply, that proxy's public statement of acceptance of any version is
permanent authorization for you to choose that version for the
Library.


=== PFDS

Purely Functional Data Structures, originally written for R6RS Scheme:
https://github.com/ijp/pfds

The license is the BSD 3-clause License: https://opensource.org/licenses/BSD-3-Clause

Copyright (C) 2011-2014 Ian Price <ianprice90@googlemail.com>
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 author may not be used to endorse or promote products
derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.

=== Rebottled

* cl-pdf

cl-pdf is a Common Lisp library for generating PDF files.

It is distributed under a FreeBSD style license
(if you want another license contact me) marc.battyani@fractalconcept.com

Copyright (c) 2002 Marc Battyani. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are
permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of
conditions and the following disclaimer.

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 MARC BATTYANI ``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 MARC BATTYANI 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.

* pregexp

pregexp.sps
Portable regular expressions for Scheme
Dorai Sitaram
http://www.ccs.neu.edu/~dorai
dorai AT ccs DOT neu DOT edu
Oct 2, 1999
Copyright (c) 1999-2005, Dorai Sitaram.
All rights reserved.

Permission to copy, modify, distribute, and use this work or
a modified copy of this work, for any purpose, is hereby
granted, provided that the copy includes this copyright
notice, and in the case of a modified copy, also includes a
notice of modification. This work is provided as is, with
no warranty of any kind.

* pstk

Copyright (C) 2008 Kenneth A Dickey
Copyright (C) 2006-2008 Nils M Holm
Copyright (C) 2004 Wolf-Dieter Busch
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.

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.

=== Robin

MIT Licence

Copyright (c) 2017-22, Peter Lane

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.

=== SLIB

The libraries here have been written or collected by Aubrey Jaffer:
http://people.csail.mit.edu/jaffer/SLIB
The individual libraries have varying licences - all licence information is
preserved on the source code.

The usual licence on these files is:

Copyright YEAR Aubrey Jaffer

Permission to copy this software, to modify it, to redistribute it,
to distribute modified versions, and to use it 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. I have made no warranty or representation that the operation of
this software will be error-free, and I am under no obligation to
provide any services, by way of maintenance, update, or otherwise.

3. In conjunction with products arising from the use of this
material, there shall be no use of my name in any advertising,
promotional, or sales literature without prior written consent in
each case.

Some libraries are by other authors, and have usually been placed in the
public domain. These include: format, minimize, object, queue, scanf,
sierpinksi, soundex, string-case, string-search, topological-sort, tree,
xml-parse, and yasos.

The resene database of colours requires specific acknowledgement, if used.

wt-tree is copyright MIT and released under the GNU GPL (version 2 or later).

== SRFI

SRFI 63 Homogeneous and Heterogeneous Arrays

Implementation of slib/array.scm

"array.scm" Arrays for Scheme

Copyright (C) 2001, 2003, 2005, 2006 Aubrey Jaffer

Permission to copy this software, to modify it, to redistribute it,
to distribute modified versions, and to use it 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. I have made no warranty or representation that the operation of
this software will be error-free, and I am under no obligation to
provide any services, by way of maintenance, update, or otherwise.

3. In conjunction with products arising from the use of this
material, there shall be no use of my name in any advertising,
promotional, or sales literature without prior written consent in
each case.

Repackaged for R7RS Scheme by Peter Lane, 2017