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- ;;; "obj2str.scm", write objects to a string.
- ;Copyright (C) 1993, 1994 Aubrey Jaffer
- ;
- ;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. I have made no warrantee or representation that the operation of
- ;this software will be error-free, and I am under no obligation to
- ;provide any services, by way of maintenance, update, or otherwise.
- ;
- ;3. In conjunction with products arising from the use of this
- ;material, there shall be no use of my name in any advertising,
- ;promotional, or sales literature without prior written consent in
- ;each case.
-
- (require 'string-port)
-
- (define (object->string obj)
- (cond ((symbol? obj) (symbol->string obj))
- ((number? obj) (number->string obj))
- (else
- (call-with-output-string
- (lambda (port) (write obj port))))))
-
- ; File: "obj2str.scm" (c) 1991, Marc Feeley
-
- ;(require 'generic-write)
-
- ; (object->string obj) returns the textual representation of 'obj' as a
- ; string.
- ;
- ; Note: (write obj) = (display (object->string obj))
-
- ;(define (object->string obj)
- ; (let ((result '()))
- ; (generic-write obj #f #f (lambda (str) (set! result (cons str result)) #t))
- ; (reverse-string-append result)))
-
- ; (object->limited-string obj limit) returns a string containing the first
- ; 'limit' characters of the textual representation of 'obj'.
-
- ;(define (object->limited-string obj limit)
- ; (let ((result '()) (left limit))
- ; (generic-write obj #f #f
- ; (lambda (str)
- ; (let ((len (string-length str)))
- ; (if (> len left)
- ; (begin
- ; (set! result (cons (substring str 0 left) result))
- ; (set! left 0)
- ; #f)
- ; (begin
- ; (set! result (cons str result))
- ; (set! left (- left len))
- ; #t)))))
- ; (reverse-string-append result)))
-