home *** CD-ROM | disk | FTP | other *** search
- ;;; time-stamp.el --- Maintain last change time stamps in files edited by Emacs
-
- ;; Copyright 1989, 1993, 1994, 1995 Free Software Foundation, Inc.
-
- ;; Maintainer's Time-stamp: <95/12/28 19:48:49 gildea>
- ;; Maintainer: Stephen Gildea <gildea@lcs.mit.edu>
- ;; Keywords: tools
-
- ;; This file is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; This file is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; 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, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Commentary:
-
- ;; If you put a time stamp template anywhere in the first 8 lines of a file,
- ;; it can be updated every time you save the file. See the top of
- ;; time-stamp.el for a sample. The template looks like one of the following:
- ;; Time-stamp: <>
- ;; Time-stamp: " "
- ;; The time stamp is written between the brackets or quotes, resulting in
- ;; Time-stamp: <95/01/18 10:20:51 gildea>
- ;; Here is an example that puts the file name and time stamp in the binary:
- ;; static char *time_stamp = "sdmain.c Time-stamp: <>";
-
- ;; To activate automatic time stamping in GNU Emacs 19, add this code
- ;; to your .emacs file:
- ;; (add-hook 'write-file-hooks 'time-stamp)
- ;;
- ;; In Emacs 18 you will need to do this instead:
- ;; (if (not (memq 'time-stamp write-file-hooks))
- ;; (setq write-file-hooks
- ;; (cons 'time-stamp write-file-hooks)))
- ;; (autoload 'time-stamp "time-stamp" "Update the time stamp in a buffer." t)
-
- ;; See the documentation for the function `time-stamp' for more details.
-
- ;;; Change Log:
-
- ;; Originally based on the 19 Dec 88 version of
- ;; date.el by John Sturdy <mcvax!harlqn.co.uk!jcgs@uunet.uu.net>
- ;; version 2, January 1995: replaced functions with %-escapes
- ;; $Id: time-stamp.el,v 1.18 1996/01/20 02:49:02 erik Exp $
-
- ;;; Code:
-
- (defvar time-stamp-active t
- "*Non-nil to enable time-stamping of buffers by \\[time-stamp].
- Can be toggled by \\[time-stamp-toggle-active].
- See also the variable time-stamp-warn-inactive.")
-
- (defvar time-stamp-warn-inactive t
- "*Non-nil to have \\[time-stamp] warn if a buffer did not get time-stamped.
- A warning is printed if time-stamp-active is nil and the buffer contains
- a time stamp template that would otherwise have been updated.")
-
- (defvar time-stamp-format "%02y/%02m/%02d %02H:%02M:%02S %u"
- "*Template for the string inserted by \\[time-stamp].
- Value may be a string or a list. (Lists are supported only for
- backward compatibility.) A string is used verbatim except
- for character sequences beginning with %:
-
- %a weekday name: `Monday'. %A gives uppercase: `MONDAY'
- %b month name: `January'. %B gives uppercase: `JANUARY'
- %d day of month
- %H 24-hour clock hour
- %I 12-hour clock hour
- %m month number
- %M minute
- %p `am' or `pm'. %P gives uppercase: `AM' or `PM'
- %S seconds
- %w day number of week, Sunday is 0
- %y year: `1995'
- %z time zone name: `est'. %Z gives uppercase: `EST'
-
- Non-date items:
- %% a literal percent character: `%'
- %f file name without directory %F gives absolute pathname
- %s system name
- %u user's login name
- %h mail host name
-
- Decimal digits between the % and the type character specify the
- field width. Strings are truncated on the right; numbers on the left.
- A leading zero causes numbers to be zero-filled.
-
- For example, to get the format used by the `date' command,
- use \"%3a %3b %2d %02H:%02M:%02S %Z %y\"")
-
-
- ;;; Do not change time-stamp-line-limit, time-stamp-start, or
- ;;; time-stamp-end in your .emacs or you will be incompatible
- ;;; with other people's files! If you must change them,
- ;;; do so only in the local variables section of the file itself.
-
- (defvar time-stamp-line-limit 8 ;Do not change!
- "Lines of a file searched; positive counts from start, negative from end.
- The patterns `time-stamp-start' and `time-stamp-end' must be found on one
- of the first (last) `time-stamp-line-limit' lines of the file for the
- file to be time-stamped by \\[time-stamp].
-
- Do not change `time-stamp-line-limit', `time-stamp-start', or
- `time-stamp-end' for yourself or you will be incompatible
- with other people's files! If you must change them for some application,
- do so in the local variables section of the time-stamped file itself.")
-
-
- (defvar time-stamp-start "Time-stamp:[ \t]+\\\\?[\"<]+" ;Do not change!
- "Regexp after which the time stamp is written by \\[time-stamp].
- See also the variables `time-stamp-end' and `time-stamp-line-limit'.
-
- Do not change `time-stamp-line-limit', `time-stamp-start', or
- `time-stamp-end' for yourself or you will be incompatible
- with other people's files! If you must change them for some application,
- do so in the local variables section of the time-stamped file itself.")
-
-
- (defvar time-stamp-end "\\\\?[\">]" ;Do not change!
- "Regexp marking the text after the time stamp.
- \\[time-stamp] deletes the text between the first match of `time-stamp-start'
- and the following match of `time-stamp-end' on the same line,
- then writes the time stamp specified by `time-stamp-format' between them.
-
- Do not change `time-stamp-line-limit', `time-stamp-start', or
- `time-stamp-end' for yourself or you will be incompatible
- with other people's files! If you must change them for some application,
- do so in the local variables section of the time-stamped file itself.")
-
-
- ;;;###autoload
- (defun time-stamp ()
- "Update the time stamp string in the buffer.
- If you put a time stamp template anywhere in the first 8 lines of a file,
- it can be updated every time you save the file. See the top of
- `time-stamp.el' for a sample. The template looks like one of the following:
- Time-stamp: <>
- Time-stamp: \" \"
- The time stamp is written between the brackets or quotes, resulting in
- Time-stamp: <95/01/18 10:20:51 gildea>
- Only does its thing if the variable time-stamp-active is non-nil.
- Typically used on write-file-hooks for automatic time-stamping.
- The format of the time stamp is determined by the variable time-stamp-format.
- The variables time-stamp-line-limit, time-stamp-start, and time-stamp-end
- control finding the template."
- (interactive)
- (let ((case-fold-search nil)
- (need-to-warn nil)
- start search-end)
- (if (and (stringp time-stamp-start)
- (stringp time-stamp-end))
- (save-excursion
- (save-restriction
- (widen)
- (if (> time-stamp-line-limit 0)
- (progn
- (goto-char (setq start (point-min)))
- (forward-line time-stamp-line-limit)
- (setq search-end (point)))
- (goto-char (setq search-end (point-max)))
- (forward-line time-stamp-line-limit)
- (setq start (point)))
- (goto-char start)
- (while
- (and (< (point) search-end)
- (re-search-forward time-stamp-start search-end 'move))
- (setq start (point))
- (end-of-line)
- (let ((line-end (point)))
- (goto-char start)
- (if (re-search-forward time-stamp-end line-end 'move)
- (progn
- (if time-stamp-active
- (let ((end (match-beginning 0)))
- (delete-region start end)
- (goto-char start)
- (insert (time-stamp-string))
- (setq end (point))
- ;; remove any tabs used to format time stamp
- (goto-char start)
- (if (search-forward "\t" end t)
- (untabify start end)))
- (if time-stamp-warn-inactive
- ;; do warning outside save-excursion
- (setq need-to-warn t)))
- (setq search-end (point))))))))
- ;; don't signal an error in a write-file-hook
- (message "time-stamp-start or time-stamp-end is not a string")
- (sit-for 1))
- (if need-to-warn
- (progn
- (message "Warning: time-stamp-active is off; did not time-stamp buffer.")
- (sit-for 1))))
- ;; be sure to return nil so can be used on write-file-hooks
- nil)
-
- ;;;###autoload
- (defun time-stamp-toggle-active (&optional arg)
- "Toggle time-stamp-active, setting whether \\[time-stamp] updates a buffer.
- With arg, turn time stamping on if and only if arg is positive."
- (interactive "P")
- (setq time-stamp-active
- (if (null arg)
- (not time-stamp-active)
- (> (prefix-numeric-value arg) 0)))
- (message "time-stamp is now %s." (if time-stamp-active "active" "off")))
-
-
- (defun time-stamp-string ()
- "Generate the new string to be inserted by \\[time-stamp]."
- (if (stringp time-stamp-format)
- (time-stamp-strftime time-stamp-format)
- (time-stamp-fconcat time-stamp-format " "))) ;version 1 compatibility
-
- (defconst time-stamp-month-numbers
- '(("Jan" . 1) ("Feb" . 2) ("Mar" . 3) ("Apr" . 4) ("May" . 5) ("Jun" . 6)
- ("Jul" . 7) ("Aug" . 8) ("Sep" . 9) ("Oct" . 10) ("Nov" . 11) ("Dec" . 12))
- "Alist of months and their number.")
-
- (defconst time-stamp-month-full-names
- ["(zero)" "January" "February" "March" "April" "May" "June"
- "July" "August" "September" "October" "November" "December"])
-
- (defconst time-stamp-weekday-numbers
- '(("Sun" . 0) ("Mon" . 1) ("Tue" . 2) ("Wed" . 3)
- ("Thu" . 4) ("Fri" . 5) ("Sat" . 6))
- "Alist of weekdays and their number.")
-
- (defconst time-stamp-weekday-full-names
- ["Sunday" "Monday" "Tuesday" "Wednesday" "Thursday" "Friday" "Saturday"])
-
- (defconst time-stamp-am-pm '("am" "pm")
- "List of strings used to denote morning and afternoon.")
-
- (defconst time-stamp-no-file "(no file)"
- "String to use when the buffer is not associated with a file.")
-
- (defun time-stamp-strftime (format &optional time)
- "Uses a FORMAT to format date, time, file, and user information.
- Optional second argument TIME will be used instead of the current time.
- See the description of the variable `time-stamp-format' for a description
- of the format string."
- (let ((time-string (cond ((stringp time)
- time)
- (time
- (current-time-string time))
- (t
- (current-time-string))))
- (fmt-len (length format))
- (ind 0)
- cur-char
- (prev-char nil)
- (result "")
- field-index
- field-width
- field-result
- (paren-level 0))
- (while (< ind fmt-len)
- (setq cur-char (aref format ind))
- (setq
- result
- (concat result
- (cond
- ((eq cur-char ?%)
- (setq field-index (1+ ind))
- (while (progn
- (setq ind (1+ ind))
- (setq cur-char (if (< ind fmt-len)
- (aref format ind)
- ?\0))
- (and (<= ?0 cur-char) (>= ?9 cur-char))))
- (setq field-width (substring format field-index ind))
- ;; eat any additional args to allow for future expansion
- (while (or (and (<= ?0 cur-char) (>= ?9 cur-char)) (eq ?. cur-char)
- (eq ?, cur-char) (eq ?: cur-char) (eq ?@ cur-char)
- (eq ?- cur-char) (eq ?+ cur-char)
- (eq ?\ cur-char) (eq ?# cur-char)
- (and (eq ?\( cur-char)
- (not (eq prev-char ?\\))
- (setq paren-level (1+ paren-level)))
- (if (and (eq ?\) cur-char)
- (not (eq prev-char ?\\))
- (> paren-level 0))
- (setq paren-level (1- paren-level))
- (and (> paren-level 0)
- (< ind fmt-len))))
- (setq ind (1+ ind))
- (setq prev-char cur-char)
- (setq cur-char (if (< ind fmt-len)
- (aref format ind)
- ?\0)))
- (setq field-result
- (cond
- ((eq cur-char ?%)
- "%")
- ((or (eq cur-char ?a) ;weekday name
- (eq cur-char ?A))
- (let ((name
- (aref time-stamp-weekday-full-names
- (cdr (assoc (substring time-string 0 3)
- time-stamp-weekday-numbers)))))
- (if (eq cur-char ?a)
- name
- (upcase name))))
- ((or (eq cur-char ?b) ;month name
- (eq cur-char ?B))
- (let ((name
- (aref time-stamp-month-full-names
- (cdr (assoc (substring time-string 4 7)
- time-stamp-month-numbers)))))
- (if (eq cur-char ?b)
- name
- (upcase name))))
- ((eq cur-char ?d) ;day of month, 1-31
- (string-to-int (substring time-string 8 10)))
- ((eq cur-char ?H) ;hour, 0-23
- (string-to-int (substring time-string 11 13)))
- ((eq cur-char ?I) ;hour, 1-12
- (let ((hour (string-to-int (substring time-string 11 13))))
- (cond ((< hour 1)
- (+ hour 12))
- ((> hour 12)
- (- hour 12))
- (t
- hour))))
- ((eq cur-char ?m) ;month number, 1-12
- (cdr (assoc (substring time-string 4 7)
- time-stamp-month-numbers)))
- ((eq cur-char ?M) ;minute, 0-59
- (string-to-int (substring time-string 14 16)))
- ((or (eq cur-char ?p) ;am or pm
- (eq cur-char ?P))
- (let ((name
- (if (> 12 (string-to-int (substring time-string 11 13)))
- (car time-stamp-am-pm)
- (car (cdr time-stamp-am-pm)))))
- (if (eq cur-char ?p)
- name
- (upcase name))))
- ((eq cur-char ?S) ;seconds, 00-60
- (string-to-int (substring time-string 17 19)))
- ((eq cur-char ?w) ;weekday number, Sunday is 0
- (cdr (assoc (substring time-string 0 3) time-stamp-weekday-numbers)))
- ((eq cur-char ?y) ;year
- (string-to-int (substring time-string -4)))
- ((or (eq cur-char ?z) ;time zone
- (eq cur-char ?Z))
- (let ((name
- (if (fboundp 'current-time-zone)
- (car (cdr (current-time-zone time))))))
- (or name (setq name ""))
- (if (eq cur-char ?z)
- (downcase name)
- (upcase name))))
- ((eq cur-char ?f) ;buffer-file-name, base name only
- (if buffer-file-name
- (file-name-nondirectory buffer-file-name)
- time-stamp-no-file))
- ((eq cur-char ?F) ;buffer-file-name, full path
- (or buffer-file-name
- time-stamp-no-file))
- ((eq cur-char ?s) ;system name
- (system-name))
- ((eq cur-char ?u) ;user name
- (user-login-name))
- ((eq cur-char ?h) ;mail host name
- (time-stamp-mail-host-name))
- ))
- (if (string-equal field-width "")
- field-result
- (let ((padded-result
- (format (format "%%%s%c"
- field-width
- (if (numberp field-result) ?d ?s))
- (or field-result ""))))
- (let ((initial-length (length padded-result))
- (desired-length (string-to-int field-width)))
- (if (> initial-length desired-length)
- ;; truncate strings on right, numbers on left
- (if (stringp field-result)
- (substring padded-result 0 desired-length)
- (substring padded-result (- desired-length)))
- padded-result)))))
- (t
- (char-to-string cur-char)))))
- (setq ind (1+ ind)))
- result))
-
- (defun time-stamp-mail-host-name ()
- "Return the name of the host where the user receives mail.
- This is the value of `mail-host-address' if bound and a string,
- otherwise the value of `time-stamp-mail-host' (for versions of Emacs
- before 19.29) otherwise the value of the function system-name."
- (or (and (boundp 'mail-host-address)
- (stringp mail-host-address)
- mail-host-address)
- (and (boundp 'time-stamp-mail-host) ;for backward compatibility
- (stringp time-stamp-mail-host)
- time-stamp-mail-host)
- (system-name)))
-
- ;;; the rest of this file is for version 1 compatibility
-
- (defun time-stamp-fconcat (list sep)
- "Similar to (mapconcat 'funcall LIST SEP) but LIST allows literals.
- If an element of LIST is a symbol, it is funcalled to get the string to use;
- the separator SEP is used between two strings obtained by funcalling a
- symbol. Otherwise the element itself is inserted; no separator is used
- around literals."
- (let ((return-string "")
- (insert-sep-p nil))
- (while list
- (cond ((symbolp (car list))
- (if insert-sep-p
- (setq return-string (concat return-string sep)))
- (setq return-string (concat return-string (funcall (car list))))
- (setq insert-sep-p t))
- (t
- (setq return-string (concat return-string (car list)))
- (setq insert-sep-p nil)))
- (setq list (cdr list)))
- return-string))
-
-
- ;;; Some useful functions to use in time-stamp-format
-
- ;;; Could generate most of a message-id with
- ;;; '(time-stamp-yymmdd "" time-stamp-hhmm "@" time-stamp-mail-host-name)
-
- ;;; pretty form, suitable for a title page
-
- (defun time-stamp-month-dd-yyyy ()
- "Return the current date as a string in \"Month DD, YYYY\" form."
- (let ((date (current-time-string)))
- (format "%s %d, %s"
- (aref time-stamp-month-full-names
- (cdr (assoc (substring date 4 7) time-stamp-month-numbers)))
- (string-to-int (substring date 8 10))
- (substring date -4))))
-
- ;;; same as __DATE__ in ANSI C
-
- (defun time-stamp-mon-dd-yyyy ()
- "Return the current date as a string in \"Mon DD YYYY\" form.
- The first character of DD is space if the value is less than 10."
- (let ((date (current-time-string)))
- (format "%s %2d %s"
- (substring date 4 7)
- (string-to-int (substring date 8 10))
- (substring date -4))))
-
- ;;; RFC 822 date
-
- (defun time-stamp-dd-mon-yy ()
- "Return the current date as a string in \"DD Mon YY\" form."
- (let ((date (current-time-string)))
- (format "%02d %s %s"
- (string-to-int (substring date 8 10))
- (substring date 4 7)
- (substring date -2))))
-
- ;;; RCS 3 date
-
- (defun time-stamp-yy/mm/dd ()
- "Return the current date as a string in \"YY/MM/DD\" form."
- (let ((date (current-time-string)))
- (format "%s/%02d/%02d"
- (substring date -2)
- (cdr (assoc (substring date 4 7) time-stamp-month-numbers))
- (string-to-int (substring date 8 10)))))
-
- ;;; RCS 5 date
-
- (defun time-stamp-yyyy/mm/dd ()
- "Return the current date as a string in \"YYYY/MM/DD\" form."
- (let ((date (current-time-string)))
- (format "%s/%02d/%02d"
- (substring date -4)
- (cdr (assoc (substring date 4 7) time-stamp-month-numbers))
- (string-to-int (substring date 8 10)))))
-
- ;;; ISO 8601 date
-
- (defun time-stamp-yyyy-mm-dd ()
- "Return the current date as a string in \"YYYY-MM-DD\" form."
- (let ((date (current-time-string)))
- (format "%s-%02d-%02d"
- (substring date -4)
- (cdr (assoc (substring date 4 7) time-stamp-month-numbers))
- (string-to-int (substring date 8 10)))))
-
- (defun time-stamp-yymmdd ()
- "Return the current date as a string in \"YYMMDD\" form."
- (let ((date (current-time-string)))
- (format "%s%02d%02d"
- (substring date -2)
- (cdr (assoc (substring date 4 7) time-stamp-month-numbers))
- (string-to-int (substring date 8 10)))))
-
- (defun time-stamp-hh:mm:ss ()
- "Return the current time as a string in \"HH:MM:SS\" form."
- (substring (current-time-string) 11 19))
-
- (defun time-stamp-hhmm ()
- "Return the current time as a string in \"HHMM\" form."
- (let ((date (current-time-string)))
- (concat (substring date 11 13)
- (substring date 14 16))))
-
- (provide 'time-stamp)
-
- ;;; time-stamp.el ends here
-