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

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

;; 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 1, 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.


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