mb_convert_case (Was: Re: #19257 [Bgs]: strtolower & strtoupper does not work for UTF-8 strings)

All: I've just committed a php-style version of the ucdata package that Stig directed me to. usage: proto string mb_convert_case(string str, int mode [, string encoding]); mode can be one of MB_CASE_UPPER, MB_CASE_LOWER or MB_CASE_TITLE. encoding specifies the encoding of str; if omitted, the mbstring.internal_encoding value will be used. The return value is str with the appropriate case folding applied. The function works by internally converting the string into UCS-4 format and applying php_unicode_to(upper|lower|title) to each unicode character, and then converts the string back into the original encoding. Stig: Rather than generate binary data files at configure time, based on a bundled UnicodeData.txt file which is quite large, causes problems for win32 builds, and has run-time thread safety and data file location issues (for freshly built but not installed php binaries), I settled on having ucgendat generate a header file with the ctype and case data tables declared within it. All that is needed is to add these files to the build and voila! it works :-) Yasuo: I know that there is development going on on sf.net; to save problems with merging I've tried to keep as much of this new code separate from existing files as possible, and also to keep the changes to mbstring.c to a minimum. There are some interesting functions available in the ucdata package; some of them might benefit mbstring, so perhaps it is worth a look? --Wez.