98 lines
4.0 KiB
Scheme
98 lines
4.0 KiB
Scheme
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;;;
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;;; Copyright (c) 1985 Massachusetts Institute of Technology
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;;;
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;;; This material was developed by the Scheme project at the
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;;; Massachusetts Institute of Technology, Department of
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;;; Electrical Engineering and Computer Science. Permission to
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;;; copy this software, to redistribute it, and to use it for any
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;;; purpose is granted, subject to the following restrictions and
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;;; understandings.
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;;;
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;;; 1. Any copy made of this software must include this copyright
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;;; notice in full.
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;;;
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;;; 2. Users of this software agree to make their best efforts (a)
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;;; to return to the MIT Scheme project any improvements or
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;;; extensions that they make, so that these may be included in
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;;; future releases; and (b) to inform MIT of noteworthy uses of
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;;; this software.
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;;;
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;;; 3. All materials developed as a consequence of the use of
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;;; this software shall duly acknowledge such use, in accordance
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;;; with the usual standards of acknowledging credit in academic
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;;; research.
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;;;
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;;; 4. MIT has made no warrantee or representation that the
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;;; operation of this software will be error-free, and MIT is
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;;; under no obligation to provide any services, by way of
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;;; maintenance, update, or otherwise.
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;;;
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;;; 5. In conjunction with products arising from the use of this
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;;; material, there shall be no use of the name of the
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;;; Massachusetts Institute of Technology nor of any adaptation
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;;; thereof in any advertising, promotional, or sales literature
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;;; without prior written consent from MIT in each case.
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;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;
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;;; Modified by Texas Instruments Inc 8/15/85
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;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define define-initial-key
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(letrec
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((%prefix
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(lambda (alists char)
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(let ((upcase (char-upcase char)))
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(%set-comtab-entry! alists upcase %command)
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(if (char-alphabetic? char)
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(%set-comtab-entry! alists (char-downcase char) %command)))))
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(%command '()))
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(lambda (char command)
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(cond ((char? char)
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(%set-comtab-key comtab (char-upcase char) command)
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(if (char-alphabetic? char)
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(%set-comtab-key comtab (char-downcase char) command)))
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((and (pair? char) (null? (cdr char)))
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(%set-comtab-key comtab (char-upcase (car char)) command)
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(if (char-alphabetic? (car char))
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(%set-comtab-key comtab (char-downcase (car char)) command)))
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((pair? char)
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(set! %command command)
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(comtab-lookup-prefix char %prefix))
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((char-set? char)
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(mapc (lambda (char) (set-comtab-entry! char command))
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(char-set-members char)))
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(else (error "Unknown character" char)))
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char)))
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(define define-initial-prefix-key
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(letrec
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((%prefix
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(lambda (alists char)
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(let ((upcase (char-upcase char)))
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(if (pair? %char)
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(%set-comtab-entry! alists upcase %command)
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(%set-comtab-key alists upcase %command))
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(%comtab-make-prefix-char! alists upcase (cons '() '()))
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(if (char-alphabetic? char)
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(%comtab-make-synonym-char! alists (char-downcase char)
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alists upcase)))))
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(%char '())
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(%command '()))
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(lambda (char command)
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(cond ((or (char? char) (pair? char))
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(set! %command command)
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(set! %char char)
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(comtab-lookup-prefix char %prefix))
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(else (error "Unknown character" char)))
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char)))
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(define (define-initial-default-key command)
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(set! default-key command)
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(set-cdr! comtab (make-vector 256 command)))
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;;; change to 256 for internationalize
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