X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/8c54a3ce68830ff53bc78528a6889fd847516ef0..dc3eeeb48af706de824b7b8bae62dc868d26637e:/lisp/timezone.el diff --git a/lisp/timezone.el b/lisp/timezone.el index 9eef8b1814..2529f7da86 100644 --- a/lisp/timezone.el +++ b/lisp/timezone.el @@ -1,10 +1,11 @@ -;;; Timezone package for GNU Emacs +;;; timezone.el --- time zone package for GNU Emacs -;; Copyright (C) 1990, 1991, 1992, 1993 Free Software Foundation, Inc. +;; Copyright (C) 1990, 1991, 1992, 1993, 1996, 1999, 2002, 2003, +;; 2004, 2005, 2006 Free Software Foundation, Inc. -;;; Author: Masanobu Umeda -;;; Maintainer: umerin@mse.kyutech.ac.jp -;;; Keywords: news +;; Author: Masanobu Umeda +;; Maintainer: umerin@mse.kyutech.ac.jp +;; Keywords: news ;; This file is part of GNU Emacs. @@ -19,12 +20,13 @@ ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License -;; along with GNU Emacs; see the file COPYING. If not, write to -;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. +;; along with GNU Emacs; see the file COPYING. If not, write to the +;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, +;; Boston, MA 02110-1301, USA. -;;; Code: +;;; Commentary: -(provide 'timezone) +;;; Code: (defvar timezone-world-timezones '(("PST" . -800) @@ -37,6 +39,7 @@ ("EDT" . -400) ("AST" . -400) ;by ("NST" . -330) ;by + ("UT" . +000) ("GMT" . +000) ("BST" . +100) ("MET" . +100) @@ -64,9 +67,9 @@ Use `current-time-zone' instead.") (defun timezone-make-date-arpa-standard (date &optional local timezone) "Convert DATE to an arpanet standard date. -Optional 1st argument LOCAL specifies the default local timezone of the DATE; +Optional 2nd argument LOCAL specifies the default local timezone of the DATE; if nil, GMT is assumed. -Optional 2nd argument TIMEZONE specifies a time zone to be represented in; +Optional 3rd argument TIMEZONE specifies a time zone to be represented in; if nil, the local time zone is assumed." (let ((new (timezone-fix-time date local timezone))) (timezone-make-arpa-date (aref new 0) (aref new 1) (aref new 2) @@ -77,9 +80,9 @@ if nil, the local time zone is assumed." (defun timezone-make-date-sortable (date &optional local timezone) "Convert DATE to a sortable date string. -Optional 1st argument LOCAL specifies the default local timezone of the DATE; +Optional 2nd argument LOCAL specifies the default local timezone of the DATE; if nil, GMT is assumed. -Optional 2nd argument TIMEZONE specifies a timezone to be represented in; +Optional 3rd argument TIMEZONE specifies a timezone to be represented in; if nil, the local time zone is assumed." (let ((new (timezone-fix-time date local timezone))) (timezone-make-sortable-date (aref new 0) (aref new 1) (aref new 2) @@ -120,13 +123,26 @@ Optional argument TIMEZONE specifies a time zone." (defun timezone-parse-date (date) "Parse DATE and return a vector [YEAR MONTH DAY TIME TIMEZONE]. -19 is prepended to year if necessary. Timezone may be nil if nothing. +Two-digit dates are `windowed'. Those <69 have 2000 added; otherwise 1900 +is added. Three-digit dates have 1900 added. +TIMEZONE is nil for DATEs without a zone field. + Understands the following styles: (1) 14 Apr 89 03:20[:12] [GMT] (2) Fri, 17 Mar 89 4:01[:33] [GMT] (3) Mon Jan 16 16:12[:37] [GMT] 1989 (4) 6 May 1992 1641-JST (Wednesday) - (5) 22-AUG-1993 10:59:12.82" + (5) 22-AUG-1993 10:59:12.82 + (6) Thu, 11 Apr 16:17:12 91 [MET] + (7) Mon, 6 Jul 16:47:20 T 1992 [MET] + (8) 1996-06-24 21:13:12 [GMT] + (9) 1996-06-24 21:13-ZONE" + ;; Get rid of any text properties. + (and (stringp date) + (or (text-properties-at 0 date) + (next-property-change 0 date)) + (setq date (copy-sequence date)) + (set-text-properties 0 (length date) nil date)) (let ((date (or date "")) (year nil) (month nil) @@ -134,13 +150,23 @@ Understands the following styles: (time nil) (zone nil)) ;This may be nil. (cond ((string-match + "\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]+\\([-+a-zA-Z0-9]+\\)" date) + ;; Styles: (1) and (2) with timezone and buggy timezone + ;; This is most common in mail and news, + ;; so it is worth trying first. + (setq year 3 month 2 day 1 time 4 zone 5)) + ((string-match "\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]*\\'" date) ;; Styles: (1) and (2) without timezone (setq year 3 month 2 day 1 time 4 zone nil)) ((string-match - "\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]*\\([-+a-zA-Z0-9]+\\)" date) - ;; Styles: (1) and (2) with timezone and buggy timezone - (setq year 3 month 2 day 1 time 4 zone 5)) + "\\([^ \t,]+\\),[ \t]+\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]+\\(T[ \t]+\\|\\)\\([0-9]+\\)[ \t]*\\'" date) + ;; Styles: (6) and (7) without timezone + (setq year 6 month 3 day 2 time 4 zone nil)) + ((string-match + "\\([^ \t,]+\\),[ \t]+\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]+\\(T[ \t]+\\|\\)\\([0-9]+\\)[ \t]*\\([-+a-zA-Z0-9]+\\)" date) + ;; Styles: (6) and (7) with timezone and buggy timezone + (setq year 6 month 3 day 2 time 4 zone 7)) ((string-match "\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]+\\([0-9]+\\)" date) ;; Styles: (3) without timezone @@ -154,48 +180,62 @@ Understands the following styles: ;; Styles: (4) with timezone (setq year 3 month 2 day 1 time 4 zone 5)) ((string-match - "\\([0-9]+\\)-\\([A-Za-z]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)\\.[0-9]+" date) + "\\([0-9]+\\)-\\([A-Za-z]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)\\(\\.[0-9]+\\)?[ \t]+\\([-+a-zA-Z0-9]+\\)" date) + ;; Styles: (5) with timezone. + (setq year 3 month 2 day 1 time 4 zone 6)) + ((string-match + "\\([0-9]+\\)-\\([A-Za-z]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)\\(\\.[0-9]+\\)?" date) ;; Styles: (5) without timezone. (setq year 3 month 2 day 1 time 4 zone nil)) + ((string-match + "\\([0-9]+\\)-\\([0-9]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)[ \t]+\\([-+a-zA-Z0-9]+\\)" date) + ;; Styles: (8) with timezone. + (setq year 1 month 2 day 3 time 4 zone 5)) + ((string-match + "\\([0-9]+\\)-\\([0-9]+\\)-\\([0-9]+\\)[T \t]+\\([0-9]+:[0-9]+\\)[ \t]+\\([-+a-zA-Z0-9:]+\\)" date) + ;; Styles: (8) with timezone with a colon in it. + (setq year 1 month 2 day 3 time 4 zone 5)) + ((string-match + "\\([0-9]+\\)-\\([0-9]+\\)-\\([0-9]+\\)[T \t]+\\([0-9]+:[0-9]+:[0-9]+\\)" date) + ;; Styles: (8) without timezone. + (setq year 1 month 2 day 3 time 4 zone nil)) ) - (if year - (progn - (setq year - (substring date (match-beginning year) (match-end year))) - ;; It is now Dec 1992. 8 years before the end of the World. - (if (< (length year) 4) - (setq year (concat "19" (substring year -2 nil)))) - (setq month - (int-to-string - (cdr - (assoc - (upcase - ;; Don't use `match-end' in order to take 3 - ;; letters from the beginning. - (substring date - (match-beginning month) - (+ (match-beginning month) 3))) - timezone-months-assoc)))) - (setq day - (substring date (match-beginning day) (match-end day))) - (setq time - (substring date (match-beginning time) (match-end time))))) - (if zone - (setq zone - (substring date (match-beginning zone) (match-end zone)))) + (when year + (setq year (match-string year date)) + ;; Guess ambiguous years. Assume years < 69 don't predate the + ;; Unix Epoch, so are 2000+. Three-digit years are assumed to + ;; be relative to 1900. + (if (< (length year) 4) + (let ((y (string-to-number year))) + (if (< y 69) + (setq y (+ y 100))) + (setq year (int-to-string (+ 1900 y))))) + (setq month + (if (= (aref date (+ (match-beginning month) 2)) ?-) + ;; Handle numeric months, spanning exactly two digits. + (substring date + (match-beginning month) + (+ (match-beginning month) 2)) + (let* ((string (substring date + (match-beginning month) + (+ (match-beginning month) 3))) + (monthnum + (cdr (assoc (upcase string) timezone-months-assoc)))) + (if monthnum + (int-to-string monthnum))))) + (setq day (match-string day date)) + (setq time (match-string time date))) + (if zone (setq zone (match-string zone date))) ;; Return a vector. - (if year + (if (and year month) (vector year month day time zone) - (vector "0" "0" "0" "0" nil)) - )) + (vector "0" "0" "0" "0" nil)))) (defun timezone-parse-time (time) "Parse TIME (HH:MM:SS) and return a vector [hour minute second]. Recognize HH:MM:SS, HH:MM, HHMMSS, HHMM." (let ((time (or time "")) - (hour nil) - (minute nil) - (second nil)) + hour minute second) (cond ((string-match "\\`\\([0-9]+\\):\\([0-9]+\\):\\([0-9]+\\)\\'" time) ;; HH:MM:SS (setq hour 1 minute 2 second 3)) @@ -211,13 +251,9 @@ Recognize HH:MM:SS, HH:MM, HHMMSS, HHMM." ) ;; Return [hour minute second] (vector - (if hour - (substring time (match-beginning hour) (match-end hour)) "0") - (if minute - (substring time (match-beginning minute) (match-end minute)) "0") - (if second - (substring time (match-beginning second) (match-end second)) "0")) - )) + (if hour (match-string hour time) "0") + (if minute (match-string minute time) "0") + (if second (match-string second time) "0")))) ;; Miscellaneous @@ -236,7 +272,7 @@ or an integer of the form +-HHMM, or a time zone name." ;; +900 timezone)) (if (stringp timezone) - (setq timezone (string-to-int timezone))) + (setq timezone (string-to-number timezone))) ;; Taking account of minute in timezone. ;; HHMM -> MM (let* ((abszone (abs timezone)) @@ -250,7 +286,7 @@ Return a list suitable as an argument to current-time-zone, or nil if the date cannot be thus represented. DATE is the number of days elapsed since the (imaginary) Gregorian date Sunday, December 31, 1 BC." - (let* ((current-time-origin 719162) + (let* ((current-time-origin 719163) ;; (timezone-absolute-from-gregorian 1 1 1970) (days (- date current-time-origin)) (seconds-per-day (float 86400)) @@ -279,14 +315,20 @@ Gregorian date Sunday, December 31, 1 BC." If LOCAL is nil, it is assumed to be GMT. If TIMEZONE is nil, use the local time zone." (let* ((date (timezone-parse-date date)) - (year (string-to-int (aref date 0))) - (year (if (< year 100) (+ year 1900) year)) - (month (string-to-int (aref date 1))) - (day (string-to-int (aref date 2))) + (year (string-to-number (aref date 0))) + (year (cond ((< year 69) + (+ year 2000)) + ((< year 100) + (+ year 1900)) + ((< year 1000) ; possible 3-digit years. + (+ year 1900)) + (t year))) + (month (string-to-number (aref date 1))) + (day (string-to-number (aref date 2))) (time (timezone-parse-time (aref date 3))) - (hour (string-to-int (aref time 0))) - (minute (string-to-int (aref time 1))) - (second (string-to-int (aref time 2))) + (hour (string-to-number (aref time 0))) + (minute (string-to-number (aref time 1))) + (second (string-to-number (aref time 2))) (local (or (aref date 4) local)) ;Use original if defined (timezone (or timezone @@ -303,30 +345,21 @@ If TIMEZONE is nil, use the local time zone." (cond ((<= 24 hour) ;24 -> 00 (setq hour (- hour 24)) (setq day (1+ day)) - (if (< (timezone-last-day-of-month month year) day) - (progn - (setq month (1+ month)) - (setq day 1) - (if (< 12 month) - (progn - (setq month 1) - (setq year (1+ year)) - )) - ))) + (when (< (timezone-last-day-of-month month year) day) + (setq month (1+ month)) + (setq day 1) + (when (< 12 month) + (setq month 1) + (setq year (1+ year))))) ((> 0 hour) (setq hour (+ hour 24)) (setq day (1- day)) - (if (> 1 day) - (progn - (setq month (1- month)) - (if (> 1 month) - (progn - (setq month 12) - (setq year (1- year)) - )) - (setq day (timezone-last-day-of-month month year)) - ))) - ) + (when (> 1 day) + (setq month (1- month)) + (when (> 1 month) + (setq month 12) + (setq year (1- year))) + (setq day (timezone-last-day-of-month month year))))) (vector year month day hour minute second timezone))) ;; Partly copied from Calendar program by Edward M. Reingold. @@ -363,4 +396,7 @@ The Gregorian date Sunday, December 31, 1 BC is imaginary." (- (/ (1- year) 100));; - century years (/ (1- year) 400)));; + Gregorian leap years +(provide 'timezone) + +;;; arch-tag: e23d5bc6-f32d-48ba-8996-323e9d654b3f ;;; timezone.el ends here