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This is a reimplementation of Lua's string library with support for UTF-8. The entire ustring library is implemented in pure Lua. PHP callbacks are also available for overrides: in LuaSandbox these are used for almost all functions, while in LuaStandalone they are used only for the pattern matching. Also, ustring.upper and ustring.lower are overridden using mw.language's .uc and .lc if available. It also includes a bunch of unit tests. Note that if you download the normalization tests, they may fail under LuaSandbox if you have PHP's intl extension installed and libicu on your system is too old. Change-Id: Ie76fdf8d3a85d0a3d2a41b0d3b7afe433f247af0
52 lines
2.3 KiB
Plaintext
52 lines
2.3 KiB
Plaintext
This is ustring, a pure-Lua library to handle UTF-8 strings.
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It implements generally the same interface as the standard string library, with
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the following differences:
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* Most functions work on codepoints rather than bytes or characters. Yes, this
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means that even though "á" and "á" should appear identical and represent the
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same character, the former is one codepoint (U+00E1) while the latter is two
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(U+0061 U+0301).
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* Added functions isutf8, byteoffset, codepoint, gcodepoint, toNFC, toNFD.
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* No workalike for string.reverse is provided.
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Contents:
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* README - This file.
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* ustring.lua - The main file for the library.
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* string.lua - Extend the string metatable with methods from this library.
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* upper.lua - Data table for ustring.upper.
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* lower.lua - Data table for ustring.lower.
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* charsets.lua - Data tables for pattern matching functions.
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* make-tables.php - Regenerate upper.lua and lower.lua using PHP's multibyte
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string library, and charsets.lua using PCRE.
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* normalization-data.lua - Data tables for toNFC and toNFD.
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* make-normalization-table.php - Regenerate normalization-data.lua based on the
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file includes/normal/UtfNormalData.inc from MediaWiki core.
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This library (consisting of the files described above) is released under the MIT
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License:
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Copyright (C) 2012 Brad Jorsch <bjorsch@wikimedia.org>
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use,
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copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following
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conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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