LICENSE

# Serena

The Serena project contains code that is covered by various licenses, which are listed below.

## Serena Project (MIT License)

This license covers all code (irrespective of the implementation language), resource and documentation files that together constitute the Serena project and that are not covered by any of the specific license sections listed below.

```
MIT License

Copyright (c) 2022 - 2026 Dietmar Planitzer

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.
```

## Libc - strtod(), dtoa() and Bigint Functions (Permissive License)

These are all the code files that contain this specific license at the top of the file and are used to  implement the conversion of a double precision IEEE binary floating point value to a string and from a string back to a floating point value. The code is derived from the code available on the newlib/fp website.

```
The author of this software is David M. Gay.

Copyright (c) 1991, 2000, 2001 by Lucent Technologies.

Permission to use, copy, modify, and distribute this software for any
purpose without fee is hereby granted, provided that this entire notice
is included in all copies of any software which is or includes a copy
or modification of this software and in all copies of the supporting
documentation for such software.

THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
WARRANTY.  IN PARTICULAR, NEITHER THE AUTHOR NOR LUCENT MAKES ANY
REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
```

## Libc - __fmt_fp.c Code File (BSD License)

This code file implements the floating point related format options for the `printf()` formatter. The code is derived from the newlib/libc/stdio/vfprintf.c file.

```
Copyright (c) 1990 The Regents of the University of California.
All rights reserved.
 
This code is derived from software contributed to Berkeley by
Chris Torek.

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. Neither the name of the University nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
```

## Libm / Openlibm

OpenLibm contains code that is covered by various licenses.

The OpenLibm code derives from the FreeBSD msun and OpenBSD libm
implementations, which in turn derives from FDLIBM 5.3. As a result, it
has a number of fixes and updates that have accumulated over the years
in msun, and also optimized assembly versions of many functions. These
improvements are provided under the BSD and ISC licenses. The msun
library also includes work placed under the public domain, which is
noted in the individual files. Further work on making a standalone
OpenLibm library from msun, as part of the Julia project is covered
under the MIT license. The test files, test-double.c and test-float.c
are under the LGPL (*).

(*) Please note that the test files are not part of the Serena OS repository.

## Parts copyrighted by the Julia project (MIT License)

>       Copyright (c) 2011-14 The Julia Project.
>       https://github.com/JuliaMath/openlibm/graphs/contributors
>
>       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.

## Parts copyrighted by Stephen L. Moshier (ISC License)

> Copyright (c) 2008 Stephen L. Moshier <steve@moshier.net>
>
> 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.

## FREEBSD MSUN (FreeBSD/2-clause BSD/Simplified BSD License)

>       Copyright 1992-2011 The FreeBSD Project. 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 FREEBSD PROJECT ``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 FREEBSD PROJECT 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.
>
>       The views and conclusions contained in the software and documentation
>       are those of the authors and should not be interpreted as representing
>       official policies, either expressed or implied, of the FreeBSD
>       Project.

## FDLIBM

>      Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
>
>      Developed at SunPro, a Sun Microsystems, Inc. business.
>      Permission to use, copy, modify, and distribute this
>      software is freely granted, provided that this notice
>      is preserved.