From: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Date: Sat, 25 Jun 2016 05:22:30 +0000 (+0200)
Subject: grep/icase: avoid kwsset on literal non-ascii strings
X-Git-Tag: v2.9.3~47^2~8
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/5c1ebcca4d1df3b2a84d01b3f32ec13bf8f760f8?hp=5c1ebcca4d1df3b2a84d01b3f32ec13bf8f760f8

grep/icase: avoid kwsset on literal non-ascii strings

When we detect the pattern is just a literal string, we avoid heavy
regex engine and use fast substring search implemented in kwsset.c.
But kws uses git-ctype which is locale-independent so it does not know
how to fold case properly outside ascii range. Let regcomp or pcre
take care of this case instead. Slower, but accurate.

Noticed-by: Plamen Totev <plamen.totev@abv.bg>
Helped-by: René Scharfe <l.s.r@web.de>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---