;;; time-date.el --- Date and time handling functions
-;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
-;; 2007, 2008, 2009 Free Software Foundation, Inc.
+;; Copyright (C) 1998-2012 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Masanobu Umeda <umerin@mse.kyutech.ac.jp>
;;; Code:
-;; Only necessary for `declare' when compiling Gnus with Emacs 21.
-(eval-when-compile (require 'cl))
-
(defmacro with-decoded-time-value (varlist &rest body)
"Decode a time value and bind it according to VARLIST, then eval BODY.
(autoload 'timezone-make-date-arpa-standard "timezone")
;;;###autoload
+;; `parse-time-string' isn't sufficiently general or robust. It fails
+;; to grok some of the formats that timezone does (e.g. dodgy
+;; post-2000 stuff from some Elms) and either fails or returns bogus
+;; values. timezone-make-date-arpa-standard should help.
(defun date-to-time (date)
- "Parse a string DATE that represents a date-time and return a time value."
+ "Parse a string DATE that represents a date-time and return a time value.
+If DATE lacks timezone information, GMT is assumed."
(condition-case ()
- (apply 'encode-time
- (parse-time-string
- ;; `parse-time-string' isn't sufficiently general or
- ;; robust. It fails to grok some of the formats that
- ;; timezone does (e.g. dodgy post-2000 stuff from some
- ;; Elms) and either fails or returns bogus values. Lars
- ;; reverted this change, but that loses non-trivially
- ;; often for me. -- fx
- (timezone-make-date-arpa-standard date)))
- (error (error "Invalid date: %s" date))))
-
-;;;###autoload
-(defun time-to-seconds (time)
- "Convert time value TIME to a floating point number.
-You can use `float-time' instead."
- (with-decoded-time-value ((high low micro time))
- (+ (* 1.0 high 65536)
- low
- (/ micro 1000000.0))))
+ (apply 'encode-time (parse-time-string date))
+ (error (condition-case ()
+ (apply 'encode-time
+ (parse-time-string
+ (timezone-make-date-arpa-standard date)))
+ (error (error "Invalid date: %s" date))))))
+
+;; Bit of a mess. Emacs has float-time since at least 21.1.
+;; This file is synced to Gnus, and XEmacs packages may have been written
+;; using time-to-seconds from the Gnus library.
+;;;###autoload(if (or (featurep 'emacs)
+;;;###autoload (and (fboundp 'float-time)
+;;;###autoload (subrp (symbol-function 'float-time))))
+;;;###autoload (progn
+;;;###autoload (defalias 'time-to-seconds 'float-time)
+;;;###autoload (make-obsolete 'time-to-seconds 'float-time "21.1"))
+;;;###autoload (autoload 'time-to-seconds "time-date"))
+
+(eval-when-compile
+ (or (featurep 'emacs)
+ (and (fboundp 'float-time)
+ (subrp (symbol-function 'float-time)))
+ (defun time-to-seconds (time)
+ "Convert time value TIME to a floating point number."
+ (with-decoded-time-value ((high low micro time))
+ (+ (* 1.0 high 65536)
+ low
+ (/ micro 1000000.0))))))
;;;###autoload
(defun seconds-to-time (seconds)
;;;###autoload
(defun time-less-p (t1 t2)
- "Say whether time value T1 is less than time value T2."
+ "Return non-nil if time value T1 is earlier than time value T2."
(with-decoded-time-value ((high1 low1 micro1 t1)
(high2 low2 micro2 t2))
(or (< high1 high2)
TIME should be a time value.
The Gregorian date Sunday, December 31, 1bce is imaginary."
(let* ((tim (decode-time time))
- (month (nth 4 tim))
- (day (nth 3 tim))
(year (nth 5 tim)))
- (+ (time-to-day-in-year time) ; Days this year
+ (+ (time-to-day-in-year time) ; Days this year
(* 365 (1- year)) ; + Days in prior years
(/ (1- year) 4) ; + Julian leap years
(- (/ (1- year) 100)) ; - century years
(defun time-to-number-of-days (time)
"Return the number of days represented by TIME.
-The number of days will be returned as a floating point number."
- (/ (time-to-seconds time) (* 60 60 24)))
+Returns a floating point number."
+ (/ (funcall (eval-when-compile
+ (if (or (featurep 'emacs)
+ (and (fboundp 'float-time)
+ (subrp (symbol-function 'float-time))))
+ 'float-time
+ 'time-to-seconds)) time) (* 60 60 24)))
;;;###autoload
(defun safe-date-to-time (date)
(setq start (match-end 0)
spec (match-string 1 string))
(unless (string-equal spec "%")
- ;; `assoc-string' is not available in Emacs 21. So when compiling
- ;; Gnus (`time-date.el' is part of Gnus) with Emacs 21, we get a
- ;; warning here. But `format-seconds' is not used anywhere in Gnus so
- ;; it's not a real problem. --rsteib
- (or (setq match (assoc-string spec units t))
+ (or (setq match (assoc (downcase spec) units))
(error "Bad format specifier: `%s'" spec))
- (if (assoc-string spec usedunits t)
+ (if (assoc (downcase spec) usedunits)
(error "Multiple instances of specifier: `%s'" spec))
(if (string-equal (car match) "z")
(setq zeroflag t)
(provide 'time-date)
-;; arch-tag: addcf07b-b20a-465b-af72-550b8ac5190f
;;; time-date.el ends here
projects / gnus / blobdiff