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;;;; 	Copyright (C) 2000, 2001, 2004, 2006, 2010 Free Software Foundation, Inc.
;;;; 
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;; 
;;;; This library is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;;;; Lesser General Public License for more details.
;;;; 
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;;;; 

;;;; Safe subset of R5RS bindings

(define-module (ice-9 safe-r5rs)
  :re-export (eqv? eq? equal?
	      number?	complex? real? rational? integer?
	      exact? inexact?
	      = < > <= >=
	      zero? positive?	negative? odd? even?
	      max min
	      + * - /
	      abs
	      quotient remainder modulo
	      gcd lcm
	      numerator denominator
	      rationalize
	      floor ceiling truncate round
	      exp log sin cos tan asin acos atan
	      sqrt
	      expt
	      make-rectangular make-polar real-part imag-part magnitude angle
	      exact->inexact inexact->exact
	      
	      number->string string->number
	   
	      boolean?
	      not
	   
	      pair?
	      cons car cdr
	      set-car! set-cdr!
	      caar cadr cdar cddr
	      caaar caadr cadar caddr cdaar cdadr cddar cdddr
	      caaaar caaadr caadar caaddr cadaar cadadr caddar cadddr
	      cdaaar cdaadr cdadar cdaddr cddaar cddadr cdddar cddddr
	      null?
	      list?
	      list
	      length
	      append
	      reverse
	      list-tail list-ref
	      memq memv member
	      assq assv assoc
	   
	      symbol?
	      symbol->string string->symbol
	   
	      char?
	      char=? char<? char>? char<=? char>=?
	      char-ci=? char-ci<? char-ci>? char-ci<=? char-ci>=?
	      char-alphabetic? char-numeric? char-whitespace?
	      char-upper-case? char-lower-case?
	      char->integer integer->char
	      char-upcase
	      char-downcase
	   
	      string?
	      make-string
	      string
	      string-length
	      string-ref string-set!
	      string=? string-ci=?
	      string<? string>? string<=? string>=?
	      string-ci<? string-ci>? string-ci<=? string-ci>=?
	      substring
	      string-length
	      string-append
	      string->list list->string
	      string-copy string-fill!
	   
	      vector?
	      make-vector
	      vector
	      vector-length
	      vector-ref vector-set!
	      vector->list list->vector
	      vector-fill!
	   
	      procedure?
	      apply
	      map
	      for-each
	      force
	   
	      call-with-current-continuation
	   
	      values
	      call-with-values
	      dynamic-wind
	   
	      eval

	      input-port? output-port?
	      current-input-port current-output-port
	   
	      read
	      read-char
	      peek-char
	      eof-object?
	      char-ready?
	   
	      write
	      display
	      newline
	      write-char

	      ;;transcript-on
	      ;;transcript-off
	      )

  :export (null-environment))

(define null-interface (resolve-interface '(ice-9 null)))

(module-use! (module-public-interface (current-module))
             null-interface)

(define (null-environment n)
  (if (not (= n 5))
      (scm-error 'misc-error 'null-environment
		 "~A is not a valid version"
		 (list n)
		 '()))
  ;; Note that we need to create a *fresh* interface
  (let ((interface (make-module 31)))
    (set-module-kind! interface 'interface)
    (module-use! interface null-interface)
    interface))