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    Length: 2912 (0xb60)
    Types: TextFile
    Names: »uio.scm.3«

└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
    └─⟦this⟧ »EUUGD11/gnu-31mar87/scheme/scm/uio.scm.3« 

TextFile

;;; -*-Scheme-*-
;;;
;;;	Copyright (c) 1984 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.
;;;

;;;; Useful I/O Procedures

(declare (usual-integrations))
\f


(define (read-file filename)
  (with-input-from-file filename
    (lambda ()
      (with-eof-action (lambda () read-file)
	(lambda ()
	  (define (readloop object)
	    (if (eq? object read-file)
		'()
		(cons object
		      (readloop (read)))))
	  (readloop (read)))))))

(define (prin1-to-string object #!optional max)
  (if (unassigned? max)
      (with-output-to-string
       (lambda ()
	 (*unparse-object object)))
      (with-output-to-truncated-string max
	(lambda ()
	  (*unparse-object object)))))
\f


;;;; Simple File Operations

(define copy-file
  (let ((p-copy-file (make-primitive-procedure 'COPY-FILE)))
    (named-lambda (copy-file from to)
      (p-copy-file (canonicalize-filename from)
		   (canonicalize-filename to)))))

(define rename-file
  (let ((p-rename-file (make-primitive-procedure 'RENAME-FILE)))
    (named-lambda (rename-file from to)
      (p-rename-file (canonicalize-filename from)
		     (canonicalize-filename to)))))

(define delete-file
  (let ((p-delete-file (make-primitive-procedure 'REMOVE-FILE)))
    (named-lambda (delete-file name)
      (p-delete-file (canonicalize-filename name)))))

(define file-exists?
  (let ((p-file-exists? (make-primitive-procedure 'FILE-EXISTS?)))
    (named-lambda (file-exists? name)
      (p-file-exists? (canonicalize-filename name)))))