[bpt/emacs.git] / lisp / vms-patch.el

;;; vms-patch.el --- override parts of files.el for VMS.

;; Maintainer: FSF
;; Last-Modified: 06 May 1992

;; Copyright (C) 1986 Free Software Foundation, Inc.

;; This file is part of GNU Emacs.

;; GNU Emacs 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.

;; GNU Emacs 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, 675 Mass Ave, Cambridge, MA 02139, USA.

;;; Code:

;;; Functions that need redefinition

;;; VMS file names are upper case, but buffer names are more
;;; convenient in lower case.

(defun create-file-buffer (filename)
  "Create a suitably named buffer for visiting FILENAME, and return it.
FILENAME (sans directory) is used unchanged if that name is free;
otherwise a string <2> or <3> or ... is appended to get an unused name."
  (generate-new-buffer (downcase (file-name-nondirectory filename))))

;;; Given a string FN, return a similar name which is a legal VMS filename.
;;; This is used to avoid invalid auto save file names.
(defun make-legal-file-name (fn)
  (setq fn (copy-sequence fn))
  (let ((dot nil) (indx 0) (len (length fn)) chr)
    (while (< indx len)
      (setq chr (aref fn indx))
      (cond
       ((eq chr ?.) (if dot (aset fn indx ?_) (setq dot t)))
       ((not (or (and (>= chr ?a) (<= chr ?z)) (and (>= chr ?A) (<= chr ?Z))
		 (and (>= chr ?0) (<= chr ?9))
		 (eq chr ?$) (eq chr ?_) (and (eq chr ?-) (> indx 0))))
	(aset fn indx ?_)))
      (setq indx (1+ indx))))
  fn)

;;; Auto save filesnames start with _$ and end with $.

(defun make-auto-save-file-name ()
  "Return file name to use for auto-saves of current buffer.
Does not consider auto-save-visited-file-name; that is checked
before calling this function.
This is a separate function so your .emacs file or site-init.el can redefine it.
See also auto-save-file-name-p."
  (if buffer-file-name
      (concat (file-name-directory buffer-file-name)
	      "_$"
	      (file-name-nondirectory buffer-file-name)
	      "$")
    (expand-file-name (concat "_$_" (make-legal-file-name (buffer-name)) "$"))))

(defun auto-save-file-name-p (filename)
  "Return t if FILENAME can be yielded by make-auto-save-file-name.
FILENAME should lack slashes.
This is a separate function so your .emacs file or site-init.el can redefine it."
  (string-match "^_\\$.*\\$" filename))

(defun vms-suspend-resume-hook ()
  "When resuming suspended Emacs, check for file to be found.
If the logical name `EMACS_FILE_NAME' is defined, `find-file' that file."
  (let ((file (vms-system-info "LOGICAL" "EMACS_FILE_NAME")))
    (if file (find-file file))))

(setq suspend-resume-hook 'vms-suspend-resume-hook)

(defun vms-suspend-hook ()
  "Don't allow suspending if logical name `DONT_SUSPEND_EMACS' is defined."
  (if (vms-system-info "LOGICAL" "DONT_SUSPEND_EMACS")
      (error "Can't suspend this emacs"))
  nil)

(setq suspend-hook 'vms-suspend-hook)

(defun vms-read-directory (dirname switches buffer)
  (save-excursion
    (set-buffer buffer)
    (subprocess-command-to-buffer
     (concat "DIRECTORY " switches " " dirname)
     buffer)
    (goto-char (point-min))
    ;; Remove all the trailing blanks.
    (while (search-forward " \n")
      (forward-char -1)
      (delete-horizontal-space))
    (goto-char (point-min))))

(setq dired-listing-switches
      "/SIZE/DATE/OWNER/WIDTH=(FILENAME=32,SIZE=5)")

(setq print-region-function
      '(lambda (start end command ign1 ign2 ign3 &rest switches)
	 (write-region start end "sys$login:delete-me.txt")
	 (send-command-to-subprocess
	  1
	  (concat command
		  " sys$login:delete-me.txt/name=""GNUprintbuffer"" "
		  (mapconcat 'identity switches " "))
	  nil nil nil)))

;;; vms-patch.el ends here
Commit	Line	Data
d501f516 ER	1	;;; vms-patch.el --- override parts of files.el for VMS.
d501f516 ER	2
e5167999 ER	3	;; Maintainer: FSF
	4	;; Last-Modified: 06 May 1992
	5
a2535589 JA	6	;; Copyright (C) 1986 Free Software Foundation, Inc.
	7
	8	;; This file is part of GNU Emacs.
	9
	10	;; GNU Emacs is free software; you can redistribute it and/or modify
	11	;; it under the terms of the GNU General Public License as published by
e5167999	12	;; the Free Software Foundation; either version 2, or (at your option)
a2535589 JA	13	;; any later version.
	14
	15	;; GNU Emacs is distributed in the hope that it will be useful,
	16	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	;; GNU General Public License for more details.
	19
	20	;; You should have received a copy of the GNU General Public License
	21	;; along with GNU Emacs; see the file COPYING. If not, write to
	22	;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
	23
e5167999	24	;;; Code:
a2535589 JA	25
	26	;;; Functions that need redefinition
	27
	28	;;; VMS file names are upper case, but buffer names are more
	29	;;; convenient in lower case.
	30
	31	(defun create-file-buffer (filename)
	32	"Create a suitably named buffer for visiting FILENAME, and return it.
	33	FILENAME (sans directory) is used unchanged if that name is free;
	34	otherwise a string <2> or <3> or ... is appended to get an unused name."
	35	(generate-new-buffer (downcase (file-name-nondirectory filename))))
	36
	37	;;; Given a string FN, return a similar name which is a legal VMS filename.
	38	;;; This is used to avoid invalid auto save file names.
	39	(defun make-legal-file-name (fn)
	40	(setq fn (copy-sequence fn))
	41	(let ((dot nil) (indx 0) (len (length fn)) chr)
	42	(while (< indx len)
	43	(setq chr (aref fn indx))
	44	(cond
	45	((eq chr ?.) (if dot (aset fn indx ?_) (setq dot t)))
	46	((not (or (and (>= chr ?a) (<= chr ?z)) (and (>= chr ?A) (<= chr ?Z))
	47	(and (>= chr ?0) (<= chr ?9))
	48	(eq chr ?$) (eq chr ?_) (and (eq chr ?-) (> indx 0))))
	49	(aset fn indx ?_)))
	50	(setq indx (1+ indx))))
	51	fn)
	52
	53	;;; Auto save filesnames start with _$ and end with $.
	54
	55	(defun make-auto-save-file-name ()
	56	"Return file name to use for auto-saves of current buffer.
	57	Does not consider auto-save-visited-file-name; that is checked
	58	before calling this function.
	59	This is a separate function so your .emacs file or site-init.el can redefine it.
	60	See also auto-save-file-name-p."
	61	(if buffer-file-name
	62	(concat (file-name-directory buffer-file-name)
	63	"_$"
	64	(file-name-nondirectory buffer-file-name)
	65	"$")
	66	(expand-file-name (concat "_$_" (make-legal-file-name (buffer-name)) "$"))))
	67
	68	(defun auto-save-file-name-p (filename)
	69	"Return t if FILENAME can be yielded by make-auto-save-file-name.
	70	FILENAME should lack slashes.
	71	This is a separate function so your .emacs file or site-init.el can redefine it."
	72	(string-match "^_\\$.*\\$" filename))
	73
	74	(defun vms-suspend-resume-hook ()
	75	"When resuming suspended Emacs, check for file to be found.
	76	If the logical name `EMACS_FILE_NAME' is defined, `find-file' that file."
	77	(let ((file (vms-system-info "LOGICAL" "EMACS_FILE_NAME")))
	78	(if file (find-file file))))
	79
	80	(setq suspend-resume-hook 'vms-suspend-resume-hook)
	81
	82	(defun vms-suspend-hook ()
	83	"Don't allow suspending if logical name `DONT_SUSPEND_EMACS' is defined."
	84	(if (vms-system-info "LOGICAL" "DONT_SUSPEND_EMACS")
	85	(error "Can't suspend this emacs"))
	86	nil)
	87
	88	(setq suspend-hook 'vms-suspend-hook)
89
90	(defun vms-read-directory (dirname switches buffer)
91	(save-excursion
92	(set-buffer buffer)
93	(subprocess-command-to-buffer
94	(concat "DIRECTORY " switches " " dirname)
95	buffer)
96	(goto-char (point-min))
97	;; Remove all the trailing blanks.
98	(while (search-forward " \n")
99	(forward-char -1)
100	(delete-horizontal-space))
101	(goto-char (point-min))))
102
103	(setq dired-listing-switches
104	"/SIZE/DATE/OWNER/WIDTH=(FILENAME=32,SIZE=5)")
86581d96 JB	105
	106	(setq print-region-function
	107	'(lambda (start end command ign1 ign2 ign3 &rest switches)
	108	(write-region start end "sys$login:delete-me.txt")
	109	(send-command-to-subprocess
	110	1
	111	(concat command
	112	" sys$login:delete-me.txt/name=""GNUprintbuffer"" "
	113	(mapconcat 'identity switches " "))
	114	nil nil nil)))
d501f516 ER	115
d501f516 ER	116	;;; vms-patch.el ends here