From 87701a58e291bd7ac3b407d10a829dac52c9c16e Mon Sep 17 00:00:00 2001 From: Carlos O'Donell Date: Thu, 8 Oct 2015 16:34:53 -0400 Subject: strcoll: Remove incorrect STRDIFF-based optimization (Bug 18589). The optimization introduced in commit f13c2a8dff2329c6692a80176262ceaaf8a6f74e, causes regressions in sorting for languages that have digraphs that change sort order, like cs_CZ which sorts ch between h and i. My analysis shows the fast-forwarding optimization in STRCOLL advances through a digraph while possibly stopping in the middle which results in a subsequent skipping of the digraph and incorrect sorting. The optimization is incorrect as implemented and because of that I'm removing it for 2.23, and I will also commit this fix for 2.22 where it was originally introduced. This patch reverts the optimization, introduces a new bug-strcoll2.c regression test that tests both cs_CZ.UTF-8 and da_DK.ISO-8859-1 and ensures they sort one digraph each correctly. The optimization can't be applied without regressing this test. Checked on x86_64, bug-strcoll2.c fails without this patch and passes after. This will also get a fix on 2.22 which has the same bug. --- locale/categories.def | 1 - 1 file changed, 1 deletion(-) (limited to 'locale/categories.def') diff --git a/locale/categories.def b/locale/categories.def index 045489d..a8dda53 100644 --- a/locale/categories.def +++ b/locale/categories.def @@ -58,7 +58,6 @@ DEFINE_CATEGORY DEFINE_ELEMENT (_NL_COLLATE_COLLSEQMB, "collate-collseqmb", std, wstring) DEFINE_ELEMENT (_NL_COLLATE_COLLSEQWC, "collate-collseqwc", std, wstring) DEFINE_ELEMENT (_NL_COLLATE_CODESET, "collate-codeset", std, string) - DEFINE_ELEMENT (_NL_COLLATE_ENCODING_TYPE, "collate-encoding-type", std, word) ), NO_POSTLOAD) -- cgit v1.1