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    Length: 2246 (0x8c6)
    Types: TextFile
    Names: »photo.scm.4«

└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
    └─⟦this⟧ »EUUGD11/gnu-31mar87/scheme/scm/photo.scm.4« 

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.
;;;

;;;; PHOTO/TOFU

(declare (usual-integrations))

(define photo-default-filename ":OUTPUT.TEXT")
(define photo)
(define tofu)

(let ((primitive (make-primitive-procedure 'INTERNAL-PHOTO)))
  (set! photo
	(named-lambda (photo #!optional filename)
	  (if (unassigned? filename)
	      (sequence (newline) (princ "Photo file is :OUTPUT.TEXT") (newline)
			(set! filename photo-default-filename)))
	  (if (not (primitive filename #!TRUE))
	      (error "Could not open photo file" 'PHOTO filename))
	  *the-non-printing-object*))
  (set! tofu
	(named-lambda (tofu)
	  (if (not (primitive photo-default-filename #!FALSE))
	      (error "Could not close photo file" 'TOFU #!FALSE))
	  *the-non-printing-object*)))