;; version.el --- Record version number of Emacs.

;; Copyright (C) 1985, 1991-1994, 1997 Free Software Foundation, Inc.

;; Maintainer: XEmacs Development Team
;; Keywords: internal, dumped

;; This file is part of XEmacs.

;; XEmacs 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.

;; XEmacs 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 XEmacs; see the file COPYING.  If not, write to the
;; Free Software Foundation Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Synched up with: FSF 19.34.

;;; Commentary:

;; This file is dumped with XEmacs.

;;; Code:

(defconst xemacs-betaname
  (and emacs-beta-version (format "(beta%d)" emacs-beta-version))
  "Non-nil when this is a test (beta) version of XEmacs.
Warning, this variable did not exist in XEmacs versions prior to 20.3")

(defconst emacs-version
  (format "%d.%d %s%s%s%s%s"
	  emacs-major-version
	  emacs-minor-version
	  (if emacs-patch-level
	      (format "(patch %d)" emacs-patch-level)
	    "")
	  (if xemacs-betaname
	      (concat " " xemacs-betaname)
	    "")
	  (if xemacs-codename
	      (concat " \"" xemacs-codename "\"")
	    "")
	  (if xemacs-extra-name
	      (concat " " xemacs-extra-name)
	    "")
	  " XEmacs Lucid")
  "Version numbers of this version of XEmacs.")

(if (featurep 'infodock)
    (require 'id-vers))

;; Moved to C code as of XEmacs 20.3
;(defconst emacs-major-version
;  (progn (or (string-match "^[0-9]+" emacs-version)
;	     (error "emacs-version unparsable"))
;         (string-to-int (match-string 0 emacs-version)))
;  "Major version number of this version of Emacs, as an integer.
;Warning, this variable did not exist in Emacs versions earlier than:
;  FSF Emacs:   19.23
;  XEmacs:      19.10")

;; Moved to C code as of XEmacs 20.3
;(defconst emacs-minor-version
;  (progn (or (string-match "^[0-9]+\\.\\([0-9]+\\)" emacs-version)
;	     (error "emacs-version unparsable"))
;         (string-to-int (match-string 1 emacs-version)))
;  "Minor version number of this version of Emacs, as an integer.
;Warning, this variable did not exist in Emacs versions earlier than:
;  FSF Emacs:   19.23
;  XEmacs:      19.10")

(defconst emacs-build-time (current-time-string)
  "Time at which Emacs was dumped out.")

(defconst emacs-build-system (system-name))

(defun emacs-version  (&optional arg)
  "Return string describing the version of Emacs that is running.
When called interactively with a prefix argument, insert string at point.
Don't use this function in programs to choose actions according
to the system configuration; look at `system-configuration' instead."
  (interactive "p")
  (save-match-data
    (let ((version-string
	   (format
	    "XEmacs %s %s(%s%s) of %s %s on %s"
	    (substring emacs-version 0 (string-match " XEmacs" emacs-version))
	    (if (not (featurep 'infodock))
		"[Lucid] "
	      "")
	    system-configuration
	    (cond ((or (and (fboundp 'featurep)
			    (featurep 'mule))
		       (memq 'mule features)) ", Mule")
		  (t ""))
	    (substring emacs-build-time 0
		       (string-match " *[0-9]*:" emacs-build-time))
	    (substring emacs-build-time
		       (string-match "[0-9]*$" emacs-build-time))
	    emacs-build-system)))
      (cond
       ((null arg) version-string)
       ((eq arg 1) (message "%s" version-string))
       (t          (insert version-string))))))

;; from emacs-vers.el
(defun emacs-version>= (major &optional minor patch)
  "Return true if the Emacs version is >= to the given MAJOR, MINOR,
   and PATCH numbers.
The MAJOR version number argument is required, but the other arguments
argument are optional. Only the Non-nil arguments are used in the test."
  (let ((emacs-patch (or emacs-patch-level emacs-beta-version -1)))
    (cond ((> emacs-major-version major))
	  ((< emacs-major-version major) nil)
	  ((null minor))
	  ((> emacs-minor-version minor))
	  ((< emacs-minor-version minor) nil)
	  ((null patch))
	  ((>= emacs-patch patch)))))

;;; We hope that this alias is easier for people to find.
(define-function 'version 'emacs-version)

;; Put the emacs version number into the `pure[]' array in a form that
;; `what(1)' can extract from the executable or a core file.  We don't
;; actually need this to be pointed to from lisp; pure objects can't
;; be GCed.
(concat "\n@" "(#)" (emacs-version)
	"\n@" "(#)" "Configuration: "
	system-configuration "\n")

;;Local variables:
;;version-control: never
;;End:

;;; version.el ends here
