From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: util-linux-owner@vger.kernel.org Received: from mail-we0-f172.google.com ([74.125.82.172]:33551 "EHLO mail-we0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760451Ab3EBSwD (ORCPT ); Thu, 2 May 2013 14:52:03 -0400 Received: by mail-we0-f172.google.com with SMTP id s10so736198wey.31 for ; Thu, 02 May 2013 11:52:02 -0700 (PDT) From: Sami Kerola To: util-linux@vger.kernel.org Cc: kerolasa@iki.fi Subject: [PATCH 05/16] cal: simplify calendar reformat calculations Date: Thu, 2 May 2013 19:51:30 +0100 Message-Id: <1367520701-14962-6-git-send-email-kerolasa@iki.fi> In-Reply-To: <1367520701-14962-1-git-send-email-kerolasa@iki.fi> References: <1367520701-14962-1-git-send-email-kerolasa@iki.fi> Sender: util-linux-owner@vger.kernel.org List-ID: The only September 1752 offset calculation that is necessary is whether Sun or Mon is the first day of the week. Signed-off-by: Sami Kerola --- misc-utils/cal.c | 41 +++++++++++++++-------------------------- 1 file changed, 15 insertions(+), 26 deletions(-) diff --git a/misc-utils/cal.c b/misc-utils/cal.c index 433db72..a89ca76 100644 --- a/misc-utils/cal.c +++ b/misc-utils/cal.c @@ -200,27 +200,16 @@ static int days_in_month[2][13] = { {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}, }; -#define SEP1752_OFS 4 /* sep1752[4] is a Sunday */ - -/* 1 Sep 1752 is represented by sep1752[6] and j_sep1752[6] */ -int sep1752[MAXDAYS+6] = { - SPACE, SPACE, SPACE, SPACE, +/* September 1752 is special, and has static assignments for both date + * and Julian representations. */ + int d_sep1752[MAXDAYS / 2] = { SPACE, SPACE, 1, 2, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, - 24, 25, 26, 27, 28, 29, 30, - SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, - SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, - SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, - SPACE, SPACE -}, j_sep1752[MAXDAYS+6] = { - SPACE, SPACE, SPACE, SPACE, + 24, 25, 26, 27, 28, 29, 30 +}, j_sep1752[MAXDAYS / 2] = { SPACE, SPACE, 245, 246, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, - 268, 269, 270, 271, 272, 273, 274, - SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, - SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, - SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, - SPACE, SPACE + 268, 269, 270, 271, 272, 273, 274 }, empty[MAXDAYS] = { SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, @@ -670,18 +659,18 @@ yearly(int day, int year) { void day_array(int day, int month, int year, int *days) { int julday, daynum, dw, dm; - int *d_sep1752; - - if (month == REFORMATION_MONTH && year == REFORMATION_YEAR) { - int sep1752_ofs = (weekstart + SEP1752_OFS) % 7; - d_sep1752 = julian ? j_sep1752 : sep1752; - memcpy(days, d_sep1752 + sep1752_ofs, MAXDAYS * sizeof(int)); - for (dm=0; dm