[lkml]   [2020]   [Mar]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: why do we need utf8 normalization when compare name?
On 2020-03-02, lampahome <> wrote:
> According to case insensitive since kernel 5.2, d_compare will
> transform string into normalized form and then compare.
> But why do we need this normalization function? Could we just compare
> by utf8 string?

The problem is that there are multiple ways to represent the same glyph
in Unicode -- for instance, you can represent Å (the symbol for
angstrom) as both U+212B and U+0041 U+030A (the latin letter "A"
followed by the ring-above symbol "°"). Different software may choose to
represent the same glyphs in different Unicode forms, hence the need for

[1] is the Wikipedia article that describes this problem and what the
different kinds of Unicode normalisation are.


Aleksa Sarai
Senior Software Engineer (Containers)
SUSE Linux GmbH
[unhandled content-type:application/pgp-signature]
 \ /
  Last update: 2020-03-02 11:38    [W:0.061 / U:22.764 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site