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- ;;;
- ;;; Copyright (c) 1985 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.
- ;;;
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;;
- ;;; Modified by Texas Instruments Inc 8/15/85
- ;;;
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
- ;;; Character Sets macros
-
- (macro make-char-set
- (lambda (e)
- (list->string (cdr e))))
-
- (define (%loop code chars predicate)
- (if (< code 256)
- (let ((char (integer->char code)))
- (%loop (1+ code)
- (if (predicate char)
- (cons char chars)
- chars)
- predicate))
- chars))
-
- (macro predicate->char-set
- (lambda (e)
- (list->string (%loop 0 '() (eval (cadr e))))))
-
-
- (macro char-set-invert
- (lambda (e)
- (list->string (%loop 0 '()
- (lambda (char)
- (not (char-set-member? (eval (cadr e)) char)))))))
-
- (macro char-set-union
- (lambda (e)
- (list->string (%loop 0 '()
- (lambda (char)
- (or (char-set-member? (eval (cadr e)) char)
- (char-set-member? (eval (caddr e)) char)))))))
-
- (macro make-non-graphic-char-set
- (lambda (e)
- (let ((set (make-string 32 (integer->char 128))))
- (do ((i 0 (1+ i)))
- ((= i 32) set)
- (string-set! set i (integer->char i))))))
-
-