It seems there is a excerpt of code in src/base/PdfString.cpp coming from Unicode, Inc. The license of that code is as follow:
/*
* Copyright 2001-2004 Unicode, Inc.
*
* Disclaimer
*
* This source code is provided as is by Unicode, Inc. No claims are
* made as to fitness for any particular purpose. No warranties of any
* kind are expressed or implied. The recipient agrees to determine
* applicability of information provided. If this file has been
* purchased on magnetic or optical media from Unicode, Inc., the
* sole remedy for any claim will be exchange of defective media
* within 90 days of receipt.
*
* Limitations on Rights to Redistribute This Code
*
* Unicode, Inc. hereby grants the right to freely use the information
* supplied in this file in the creation of products supporting the
* Unicode Standard, and to make copies of this file in any form
* for internal or external distribution as long as this notice
* remains attached.
*/
Such license is not free, as:
1) it doesn't grant right to modify the code (which you did, so
technically you'd be in violation)
2) it is worded in a way that seems to limit the usage of the code,
only in works aimed at supporting the Unicode standard.
Now, apparently Unicode, Inc changed its standard licenses few years
ago, and so if there is a new version of that code it might be possible
to pull that and have a really free license (I don't know how feasible
it is, according to your local changes).
Another way would be of course to reimplement those functions. Or to
depend on similar implementations coming from external libraries.
--
regards,
Mattia Rizzolo
GPG Key: 66AE 2B4A FCCF 3F52 DA18 4D18 4B04 3FCD B944 4540 .''`.
more about me: https://mapreri.org : :' :
Launchpad user: https://launchpad.net/~mapreri `. `'`
Debian QA page: https://qa.debian.org/developer.php?login=mattia `-
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