From 5ea85b08cb5ea14480d820dc69629f8725d3e0f9 Mon Sep 17 00:00:00 2001 From: "Guillermo J. Rozas" Date: Wed, 28 Aug 1991 14:53:32 +0000 Subject: [PATCH] Initial revision --- v7/src/edwin/telnet.scm | 188 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 188 insertions(+) create mode 100644 v7/src/edwin/telnet.scm diff --git a/v7/src/edwin/telnet.scm b/v7/src/edwin/telnet.scm new file mode 100644 index 000000000..299aaffdc --- /dev/null +++ b/v7/src/edwin/telnet.scm @@ -0,0 +1,188 @@ +#| -*-Scheme-*- + +$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/edwin/telnet.scm,v 1.1 1991/08/28 14:53:32 jinx Exp $ + +Copyright (c) 1991 Massachusetts Institute of Technology + +This material was developed by the Scheme project at the Massachusetts +Institute of Technology, Department of Electrical Engineering and +Computer Science. Permission to copy this software, to redistribute +it, and to use it for any purpose is granted, subject to the following +restrictions and understandings. + +1. Any copy made of this software must include this copyright notice +in full. + +2. Users of this software agree to make their best efforts (a) to +return to the MIT Scheme project any improvements or extensions that +they make, so that these may be included in future releases; and (b) +to inform MIT of noteworthy uses of this software. + +3. All materials developed as a consequence of the use of this +software shall duly acknowledge such use, in accordance with the usual +standards of acknowledging credit in academic research. + +4. MIT has made no warrantee or representation that the operation of +this software will be error-free, and MIT is under no obligation to +provide any services, by way of maintenance, update, or otherwise. + +5. In conjunction with products arising from the use of this material, +there shall be no use of the name of the Massachusetts Institute of +Technology nor of any adaptation thereof in any advertising, +promotional, or sales literature without prior written consent from +MIT in each case. +|# + +;;;; Run Telnet in a buffer + +(declare (usual-integrations)) + +(define-variable telnet-prompt-pattern + "#f or Regexp to match prompts in telnet buffers." + #f) + +(define-major-mode telnet comint "Telnet" + "Major mode for interacting with the telnet program. +Return after the end of the process' output sends the text from the + end of process to the end of the current line. +Return before end of process output copies rest of line to end (skipping + the prompt) and sends it. + +Customization: Entry to this mode runs the hooks on comint-mode-hook +and telnet-mode-hook, in that order." + + (set-variable! comint-prompt-regexp + (or (ref-variable telnet-prompt-pattern) + (ref-variable shell-prompt-pattern))) + (let ((process (current-process))) + (if process + (set-process-filter! process + (make-telnet-filter process)))) + (event-distributor/invoke! (ref-variable telnet-mode-hook))) + +(define-key 'telnet #\C-m 'telnet-send-input) +(define-key 'telnet '(#\C-c #\C-c) 'telnet-self-send) +(define-key 'telnet '(#\C-c #\C-g) 'telnet-self-send) +(define-key 'telnet '(#\C-c #\C-q) 'telnet-send-character) +(define-key 'telnet '(#\C-c #\C-z) 'telnet-self-send) +(define-key 'telnet '(#\C-c #\C-\\) 'telnet-self-send) + +(define-variable telnet-mode-hook + "An event distributor that is invoked when entering Telnet mode." + (make-event-distributor)) + +(define-command telnet + "Run telnet in a buffer. +With a prefix argument, it unconditionally creates a new telnet connection." + "sTelnet to Host\nP" + (lambda (host #!optional arg) + (select-buffer + (make-comint (ref-mode-object telnet) + (let ((default (string-append host "-telnet"))) + (if (or (default-object? arg) + (not arg)) + default + (list default))) + "telnet" + host)))) + +(define-command telnet-send-input + "Send input to telnet process. +The input is entered in the history ring." + () + (lambda () (comint-send-input "\n" true))) + +(define-command telnet-self-send + "Immediately send the last command key to the telnet process. +Typically bound to C-c where char is an interrupt key for the process +running remotely." + () + (lambda () + (process-send-char (current-process) + (last-command-key)))) + +(define-command telnet-send-character + "Reads a character and sends it to the telnet process." + "p" + (lambda (argument) + (let ((char (read-quoted-char "Send Character: ")) + (process (current-process))) + (if (= argument 1) + (process-send-char process char) + (process-send-string process + (make-string argument char)))))) + + +(define (telnet-filter-substring string start end) + (substring-substitute string start end + (ref-variable telnet-replacee) + (ref-variable telnet-replacement))) + +(define-variable telnet-replacee + "String to replace in telnet output." + (string #\return)) + +(define-variable telnet-replacement + "String to use as replacement in telnet output." + "") + +(define (make-telnet-filter process) + (lambda (string start end) + (let ((mark (process-mark process))) + (and mark + (let ((index (mark-index mark)) + (new-string (telnet-filter-substring string start end))) + (let ((new-length (string-length new-string))) + (group-insert-substring! (mark-group mark) + index new-string 0 new-length) + (set-mark-index! mark (+ index new-length)) + true)))))) + +(define (substring-substitute string start end source target) + (let ((length (fix:- end start)) + (slength (string-length source)) + (tlength (string-length target))) + (if (fix:zero? slength) + (error "substring-replace: Empty source" source)) + (let ((alloc-length + (fix:+ length + (fix:* (fix:quotient length slength) + tlength))) + (char (string-ref source 0))) + (let ((result (string-allocate alloc-length))) + + (define (done copy-index write-index) + (if (fix:< copy-index end) + (substring-move-right! string copy-index end + result write-index)) + (set-string-length! result + (fix:+ write-index + (fix:- end copy-index))) + result) + + (define (loop copy-index read-index write-index) + (if (fix:>= read-index end) + (done copy-index write-index) + (let ((index (substring-find-next-char string + read-index end + char))) + (cond ((not index) + (done copy-index write-index)) + ((or (fix:= slength 1) + (substring-prefix? source 0 slength string + index end)) + (substring-move-right! string copy-index index + result write-index) + (let ((next-write + (fix:+ write-index (fix:- index copy-index))) + (next-read (fix:+ index slength))) + (if (not (fix:= tlength 0)) + (substring-move-right! target 0 tlength + result next-write)) + (loop next-read + next-read + (fix:+ next-write tlength)))) + (else + (loop copy-index (fix:+ index 1) write-index)))))) + + (loop start start 0))))) \ No newline at end of file -- 2.25.1