• Torsten Bögershausen's avatar
    utf8: make it easier to auto-update git_wcwidth() · 9c94389c
    Torsten Bögershausen authored
    The function git_wcwidth() returns for a given unicode code point the
    width on the display:
    
     -1 for control characters,
      0 for combining or other non-visible code points
      1 for e.g. ASCII
      2 for double-width code points.
    
    This table had been originally been extracted for one Unicode
    version, probably 3.2.
    
    We now use two tables these days, one for zero-width and another for
    double-width.  Make it easier to update these tables to a later
    version of Unicode by factoring out the table from utf8.c into
    unicode_width.h and add the script update_unicode.sh to update the
    table based on the latest Unicode specification files.
    
    Thanks to Peter Krefting <peter@softwolves.pp.se> and Kevin Bracey
    <kevin@bracey.fi> for helping with their Unicode knowledge.
    Signed-off-by: default avatarTorsten Bögershausen <tboegi@web.de>
    Signed-off-by: default avatarJunio C Hamano <gitster@pobox.com>
    9c94389c
update_unicode.sh 1.14 KB