b9cd1cdb4f
The performance gain from this change depends on the text encoding and input string size. For very small strings, other overheads tend to swamp the performance gains to some extent, such that the speedup is less than 2x. For medium-length strings (~100 bytes or so), the speedup is typically around 2.5x. The greatest performance gains are for UTF-8 strings which have already been marked as valid (using the GC flags on the zend_string object); for those, the speedup is more than 10x in many cases. The previous implementation first converted the haystack and needle to wchars, then searched for matches between the two sequences of wchars. Because we use -1 as an error marker when converting to wchars, error markers from invalid byte sequences in the haystack would match error markers from invalid byte sequences in the needle, even if the specific invalid byte sequence was different. I am not sure whether this behavior is really desirable or not, but anyways, this new implementation follows the same behavior so as not to cause BC breaks.
libmbfl
This is libmbfl, a streamable multibyte character code filter and converter library, written by Shigeru Kanemoto.
The original version of libmbfl is developed and distributed at https://github.com/moriyoshi/libmbfl under the LGPL 2.1 license. See the LICENSE file for licensing information.
The libmbfl library is bundled with PHP as a fork of the original repository and is not in sync with the upstream. As such, the libmbfl directory is directly modified in the php-src repository.
Changelog
October 2017
- Since 2017, it is forked and bundled in the php-src repository. For the list of changes related to PHP see the PHP NEWS change logs.
Version 1.3.2 August 20, 2011
- Added JISX-0213:2004 based encoding : Shift_JIS-2004, EUC-JP-2004, ISO-2022-JP-2004 (rui).
- Added gb18030 encoding (rui).
- Added CP950 with user user defined area based on Big5 (rui).
- Added mapping for user defined character area to CP936 (rui).
- Added UTF-8-Mobile to support the pictogram characters defined by mobile phone carrier in Japan (rui).
Version 1.3.1 August 5, 2011
- Added check for invalid/obsolete utf-8 encoding (rui).
Version 1.3.0 August 1, 2011
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Added encoding conversion between Shift_JIS and Unicode (6.0 or PUA) for pictogram characters defined by mobile phone carrier in Japan (rui).
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Fixed encoding conversion of cp5022x for user defined area (rui).
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Added MacJapanese (SJIS-mac) for legacy encoding support (rui).
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Backport from PHP 5.2 (rui).
Version 1.1.0 March 02, 2010
- Added cp5022x encoding (moriyoshi)
- Added ISO-2022-JP-MS (moriyoshi)
- Moved to github.com from sourceforge.jp (moriyoshi)
Earlier versions
- 1998/11/10 sgk implementation in C++
- Rewriting with sgk C 1999/4/25.
- 1999/4/26 Implemented sgk input filter. Add filter while estimating kanji code.
- 1999/6 Unicode support.
- 1999/6/22 Changed sgk license to LGPL.
Credits
Marcus Boerger helly@php.net Hayk Chamyan hamshen@gmail.com Wez Furlong wez@thebrainroom.com Rui Hirokawa hirokawa@php.net Shigeru Kanemoto sgk@happysize.co.jp U. Kenkichi kenkichi@axes.co.jp Moriyoshi Koizumi moriyoshi@php.net Hironori Sato satoh@jpnnet.com Tsukada Takuya tsukada@fminn.nagano.nagano.jp Tateyama tateyan@amy.hi-ho.ne.jp Den V. Tsopa tdv@edisoft.ru Maksym Veremeyenko verem@m1stereo.tv Haluk AKIN halukakin@gmail.com