From patchwork Sun Jan 20 08:47:11 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: TAMUKI Shoichi X-Patchwork-Id: 1028121 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=sourceware.org (client-ip=209.132.180.131; helo=sourceware.org; envelope-from=libc-alpha-return-99447-incoming=patchwork.ozlabs.org@sourceware.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linet.gr.jp Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; secure) header.d=sourceware.org header.i=@sourceware.org header.b="G1dfE2oc"; dkim-atps=neutral Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 43j7hJ1W36z9sBZ for ; Sun, 20 Jan 2019 19:51:27 +1100 (AEDT) DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:message-id:from:date:to:subject:in-reply-to :references:mime-version:content-type; q=dns; s=default; b=d4fr2 fxiU/gaJPcl72c1uGnDAvYtTGgpyruOtUJnSbEXRF3ldrIgG95XtXiEr4Frl9C4s AQxmOi4VkQYdesme1TW1cwtoQb2hCMzQsxPvpSQ+j5XqDhBnpTv56oRSNxdJ/oef YcaUAM6z0bHBg3unEuPSq076m4zx4d+4yLT92s= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:message-id:from:date:to:subject:in-reply-to :references:mime-version:content-type; s=default; bh=P/x/rZdUnIP sQnoZCqspDTLKShw=; b=G1dfE2ocisWPsIAPggXi4YSUH1054RmjEhfdyuyupDn kOTRQskksrGd7o+s4Pao2guaE5u5Z1sCk1uBSM/NMDJYeEhSe5Jvde8U4dYBe5HH NHD5bqZnYIl/gzC62ddU1ZuWR8n9ROae4BLSvvsghkE0t0n0nHpYcFNhmeRjZd4E = Received: (qmail 2849 invoked by alias); 20 Jan 2019 08:51:22 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 2839 invoked by uid 89); 20 Jan 2019 08:51:21 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-25.9 required=5.0 tests=BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, KAM_LAZY_DOMAIN_SECURITY, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.2 spammy=calendars, nine, H*MI:sk:2019012, dates X-HELO: mail.linet.jp Message-Id: <201901200847.AA04198@tamuki.linet.gr.jp> From: TAMUKI Shoichi Date: Sun, 20 Jan 2019 17:47:11 +0900 To: libc-alpha@sourceware.org Subject: [PATCH v8 1/2] strftime: Set the default width of "%Ey" to 2 [BZ #23758] In-Reply-To: <201901200844.AA04197@tamuki.linet.gr.jp> References: <201901200844.AA04197@tamuki.linet.gr.jp> MIME-Version: 1.0 In Japanese locales, strftime's alternative year format (%Ey) produces a year numbered within a time period called an _era_. A new era typically begins when a new emperor is enthroned. The result of "%Ey" is therefore usually a one- or two-digit number. Many programs that display Japanese era dates assume that the era year is two digits wide. To improve how these programs display dates during the first nine years of a new era, change "%Ey" to pad one- digit numbers on the left with a zero. This change applies to all locales. It is expected to be harmless for other locales that use the alternative year format (e.g. lo_LA and th_TH, in which "%Ey" produces the year of the Buddhist calendar) as those calendars' year numbers are already more than two digits wide, and this is not expected to change. This change needs to be in place before 2019-05-01 CE, as a new era is scheduled to begin on that date. ChangeLog: [BZ #23758] * manual/time.texi (strftime): Document "%Ey". * time/strftime_l.c (__strftime_internal): Set the default width padding with zero of "%Ey" to 2. --- NEWS | 8 ++++++++ manual/time.texi | 7 +++++++ time/strftime_l.c | 2 +- 3 files changed, 16 insertions(+), 1 deletion(-) diff --git a/NEWS b/NEWS index cc20102fda..06e64ddb48 100644 --- a/NEWS +++ b/NEWS @@ -52,6 +52,14 @@ Major new features: - C-SKY ABIV2 soft-float little-endian - C-SKY ABIV2 hard-float little-endian +* strftime's default formatting of a locale's alternative year (%Ey) + has been changed to zero-pad the year to a minimum of two digits, + like "%y". This improves the display of Japanese era years during + the first nine years of a new era, and is expected to be harmless + for all other locales (only Japanese locales regularly have + alternative year numbers less than 10). Zero-padding can be + overridden with the '_' or '-' flags (which are GNU extensions). + Deprecated and removed features, and other changes affecting compatibility: * The glibc.tune tunable namespace has been renamed to glibc.cpu and the diff --git a/manual/time.texi b/manual/time.texi index fd7781c531..03a8a0e10f 100644 --- a/manual/time.texi +++ b/manual/time.texi @@ -1568,6 +1568,13 @@ The preferred time of day representation for the current locale. The year without a century as a decimal number (range @code{00} through @code{99}). This is equivalent to the year modulo 100. +If the @code{E} modifier is specified (@code{%Ey}), instead produces +the year number according to a locale-specific alternative calendar. +Unlike @code{%y}, the number is @emph{not} reduced modulo 100. +However, by default it is zero-padded to a minimum of two digits (this +can be overridden by an explicit field width or by the @code{_} and +@code{-} flags). + @item %Y The year as a decimal number, using the Gregorian calendar. Years before the year @code{1} are numbered @code{0}, @code{-1}, and so on. diff --git a/time/strftime_l.c b/time/strftime_l.c index 7ba4179de3..cbe08e7afb 100644 --- a/time/strftime_l.c +++ b/time/strftime_l.c @@ -1294,7 +1294,7 @@ __strftime_internal (CHAR_T *s, size_t maxsize, const CHAR_T *format, if (era) { int delta = tp->tm_year - era->start_date[0]; - DO_NUMBER (1, (era->offset + DO_NUMBER (2, (era->offset + delta * era->absolute_direction)); } #else