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    Length: 2968 (0xb98)
    Types: TextFile
    Names: »load.scm.4«

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

;;;; Program Loading

(declare (usual-integrations))
\f


(define load)
(define load-noisily)
(define load-noisily? #!FALSE)

(let ((eof-tag '(EOF-TAG)))
  (define (basic-load filename environment)
    (define (kernel filename)
      (with-open-input-stream
       filename
       (lambda (input-stream)
	 (if (character-equal? (tyipeek input-stream) 250)
	     (sequence (close-input-stream input-stream)
		       (scode-eval (binary-fasload filename) environment))
	     (let readloop ((object (read input-stream eof-tag))
			    (last-object *the-non-printing-object*))
	       (if (eq? object eof-tag)
		   last-object
		   (let ((value (eval object environment)))
		     (if load-noisily? (print value))
		     (readloop (read input-stream eof-tag)
			       value))))))))
    (if (pair? filename)
	(mapc kernel filename)
	(kernel filename)))

  (set! load
	(named-lambda (load filename #!optional environment)
	  (basic-load filename
		      (if (unassigned? environment)
			  (rep-environment)
			  environment))))

  (set! load-noisily
	(named-lambda (load filename #!optional environment)
	  (fluid-let ((load-noisily? #!TRUE))
	    (basic-load filename
			(if (unassigned? environment)
			    (rep-environment)
			    environment))))))

(define binary-fasload
  (let ((primitive (make-primitive-procedure 'BINARY-FASLOAD)))
    (named-lambda (binary-fasload filename)
      (primitive (canonicalize-filename filename)))))