Third-party notices for charr ============================= Scope of this file ------------------ Charr's original code and documentation are copyright (c) 2026 Travers Ching and are distributed under the MIT License recorded in `DESCRIPTION` and `LICENSE`. Material derived from stringr is also distributed under the MIT License, with the upstream copyright notice reproduced below. This file collects the copyright and license notices for material included in charr from stringr and stringi. The complete ICU4C notice is supplied in the separate `icu/LICENSE` file because it includes the Unicode License v3 and all third-party component notices from the ICU distribution. stringi ------- Charr's optimized backends contain R and C++ code copied or adapted from stringi. The package's original ICU4C vendoring layout and parts of its build configuration were also adapted from stringi. Copied files that carried upstream copyright and BSD notices retain them. This aggregate notice also applies to stringi-derived code that charr has since reorganized or rewritten. The pinned source is stringi 1.8.9 at commit 68fe9b91cee2ca959d72a75660add028531d6af1 (2026-07-30). Copyright (c) 2013-2025, Marek Gagolewski 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. Neither the name of the copyright holder 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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. ICU4C ----- Charr bundles ICU4C 78.3 source code and data from Unicode, Inc. and others. The primary notice is copyright (c) 2016-2025 Unicode, Inc. under the Unicode License v3, SPDX identifier Unicode-3.0. ICU also contains components with their own copyright holders and compatible terms. The complete Unicode License v3 and every third-party notice supplied with ICU4C 78.3 are included in `icu/LICENSE` in the installed package and `src/icu78/LICENSE` in the repository and source package. Those files are retained verbatim from ICU's distribution. Charr carries twelve small source adjustments for compiler diagnostics and portability. They do not alter ICU's license terms. The adjusted files and changes are listed under "Source-package adjustments" in `src/icu78/UPSTREAM.md` in the source package, which also records source archive hashes and data provenance. stringr ------- Charr is a fork of stringr, and its R interface, documentation, and tests contain material derived from it. Current stringr metadata identifies Hadley Wickham and Posit Software, PBC as copyright holders. Copyright (c) 2023 stringr authors 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. Tatoeba ------- Charr's benchmark measures against sentences from the Tatoeba Project (), released under Creative Commons Attribution 2.0 France with attribution to Tatoeba. Some sentences are additionally available under CC0 1.0, and sentences from the Tanaka Corpus are in the public domain. No Tatoeba data is included in this package or in its repository. The benchmark reads a sentence export the maintainer supplies locally, and the corpus it derives from that export is untracked. External package dependencies ----------------------------- Charr calls the installed stringi package for its reference backend and uses the installed charport package for ALTREP interoperability. Those package distributions are not bundled in charr and retain their own licenses. This does not change the notices above for stringi-derived source that is included directly in charr.