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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
- ;;;
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-
- (define char<=
- (lambda (a1 c e1)
- (and (char<=? a1 c)
- (char<=? c e1))))
-
- (define (char-set-member? char-set char)
- (substring-find-next-char-in-set char-set 0 (string-length char-set) char))
-
- ;;; Character Sets
-
- (define char-set:whitespace
- (make-char-set #\Space #\Newline
- #\Tab #\Return #\Page
- ))
-
- (define char-set:not-whitespace
- (char-set-invert char-set:whitespace))
-
- (define char-set-predicate
- (lambda (char-set)
- (let ((len (string-length char-set)))
- (lambda (char)
- (substring-find-next-char-in-set char-set 0 len char)))))
-
- (define char-whitespace? (char-set-predicate char-set:whitespace))
-
- (define char-set:alphabetic
- (predicate->char-set
- (lambda (char)
- (or (char<= #\A char #\Z)
- (char<= #\a char #\z)))))
-
- (define char-alphabetic? (char-set-predicate char-set:alphabetic))
-
- (define char-set:alphanumeric
- (predicate->char-set
- (lambda (char)
- (or (char<= #\0 char #\9)
- (char<= #\A char #\Z)
- (char<= #\a char #\z)))))
-
- (define char-set:graphic
- (char-set-union char-set:alphanumeric
- (make-char-set #\! #\" #\# #\$ #\% #\& #\' #\( #\) #\*
- #\+ #\, #\- #\. #\/ #\: #\; #\< #\= #\>
- #\? #\@ #\[ #\\ #\] #\^ #\_ #\` #\{ #\|
- #\} #\~ #\Space)))
-
- (define char-graphic? (char-set-predicate char-set:graphic))
-
- (define sexp-delims (make-char-set #\( #\)))
-
- (define char-set:blanks (make-char-set #\Space #\Tab))
- (define char-blank? (char-set-predicate char-set:blanks))
- (define char-set:non-blanks (char-set-invert char-set:blanks))
- ;define find-next-blank (char-set-forward-search char-set:blanks))
- ;define find-previous-blank (char-set-backward-search char-set:blanks))
-
- (define word-constituent-chars
- (char-set-union char-set:alphanumeric
- (make-char-set #\$ #\% #\.)))
-
- (define word-delimiter-chars
- (char-set-invert word-constituent-chars))
-
- (define sexp-constituent-chars
- (char-set-union char-set:alphanumeric
- (make-char-set #\! #\$ #\% #\* #\/ #\: #\< #\= #\> #\? #\_
- #\- #\+ #\~ #\@ #\# #\^)))
-
- (define sexp-delimeter-chars (char-set-invert sexp-constituent-chars))
-
- (define char-set-sexp? (char-set-predicate sexp-constituent-chars))
-
-
- (define non-graphic-chars (make-non-graphic-char-set))
-
-
-
-