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+;;;"gambit.init" Initialisation for SLIB for Gambit	-*-scheme-*-
+;;; Copyright (C) 1991, 1992, 1993 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.
+
+;;; Updated 1992 February 1 for Gambit v1.71 -- by Ken Dickey
+;;; Date: Wed, 12 Jan 1994 15:03:12 -0500
+;;; From: barnett@armadillo.urich.edu (Lewis Barnett)
+;;; Relative pathnames for Slib in MacGambit
+
+(define (SOFTWARE-TYPE) 'UNIX)		; 'MACOS for MacGambit.
+
+(define (scheme-implementation-type) 'gambit)
+
+(define (scheme-implementation-version) "?")
+
+(define SYSTEM ##unix-system)		; Comment out for 'MACOS
+
+;;; (implementation-vicinity) should be defined to be the pathname of
+;;; the directory where any auxillary files to your Scheme
+;;; implementation reside.
+
+(define implementation-vicinity
+  (let ((arg0 (vector-ref ##argv 0)))
+    (let loop ((i (- (string-length arg0) 1)))
+      (cond ((negative? i) "")
+	    ((char=? #\: (string-ref arg0 i))
+	     (lambda ()
+	       (substring arg0 0 (+ i 1))))
+	    (else (loop (- i 1)))))))
+
+;;; (library-vicinity) should be defined to be the pathname of the
+;;; directory where files of Scheme library functions reside.
+
+;;; This assumes that the slib files are in a folder
+;;; called slib in the same directory as the MacGambit Interpreter.
+
+(define library-vicinity
+  (let ((library-path
+	 (case (software-type)
+	   ((UNIX) "/usr/local/lib/slib/")
+	   ((MACOS) (string-append (implementation-vicinity) ":slib:"))
+	   ((AMIGA)	"dh0:scm/Library/")
+	   ((VMS) "lib$scheme:")
+	   ((MS-DOS) "C:\\SLIB\\")
+	   (else ""))))
+    (lambda () library-path)))
+
+;;; *features* should be set to a list of symbols describing features
+;;; of this implementation.  See Template.scm for the list of feature
+;;; names.
+
+(define *features*
+     ((lambda (l)
+	(if (eq? (SOFTWARE-TYPE) 'MACOS) l (cons 'system l)))
+      '(
+	source				;can load scheme source files
+					;(slib:load-source "filename")
+	compiled			;can load compiled files
+					;(slib:load-compiled "filename")
+	rev4-report
+	ieee-p1178
+	sicp
+	rev4-optional-procedures
+	rev3-procedures
+	rev2-procedures
+	multiarg/and-
+	multiarg-apply
+	object-hash
+	rationalize
+	delay
+	with-file
+	transcript
+	char-ready?
+	ieee-floating-point
+	full-continuation
+	)))
+
+;;; (OUTPUT-PORT-WIDTH <port>)
+(define (output-port-width . arg) 79)
+
+;;; (OUTPUT-PORT-HEIGHT <port>)
+(define (output-port-height . arg) 24)
+
+;;; (CURRENT-ERROR-PORT)
+(define current-error-port
+  (let ((port (current-output-port)))
+    (lambda () port)))
+
+;;; (TMPNAM) makes a temporary file name.
+(define tmpnam
+  (let ((cntr 100))
+    (lambda () (set! cntr (+ 1 cntr))
+	    (let ((tmp (string-append "slib_" (number->string cntr))))
+	      (if (file-exists? tmp) (tmpnam) tmp)))))
+
+;;; FORCE-OUTPUT flushes any pending output on optional arg output port
+;;; use this definition if your system doesn't have such a procedure.
+(define (force-output . arg) #t)
+
+;;; CHAR-CODE-LIMIT is one greater than the largest integer which can
+;;; be returned by CHAR->INTEGER.
+(define char-code-limit 256)
+
+;; MOST-POSITIVE-FIXNUM is used in modular.scm
+(define most-positive-fixnum #x1FFFFFFF)  ;; 3-bit tag for 68K
+
+;;; Return argument
+(define (identity x) x)
+
+;;; If your implementation provides eval, SLIB:EVAL is single argument
+;;; eval using the top-level (user) environment.
+(define SLIB:EVAL ##eval-global);; Gambit v1.71
+
+;;; If your implementation provides R4RS macros:
+;(define macro:eval slib:eval)
+;(define macro:load load)
+
+(define *defmacros*
+  (list (cons 'defmacro
+	      (lambda (name parms . body)
+		`(set! *defmacros* (cons (cons ',name (lambda ,parms ,@body))
+				      *defmacros*))))))
+(define (defmacro? m) (and (assq m *defmacros*) #t))
+
+(define (macroexpand-1 e)
+  (if (pair? e) (let ((a (car e)))
+		  (cond ((symbol? a) (set! a (assq a *defmacros*))
+				     (if a (apply (cdr a) (cdr e)) e))
+			(else e)))
+      e))
+
+(define (macroexpand e)
+  (if (pair? e) (let ((a (car e)))
+		  (cond ((symbol? a)
+			 (set! a (assq a *defmacros*))
+			 (if a (macroexpand (apply (cdr a) (cdr e))) e))
+			(else e)))
+      e))
+
+(define gentemp
+  (let ((*gensym-counter* -1))
+    (lambda ()
+      (set! *gensym-counter* (+ *gensym-counter* 1))
+      (string->symbol
+       (string-append "slib:G" (number->string *gensym-counter*))))))
+
+(define base:eval slib:eval)
+(define (defmacro:eval x) (base:eval (defmacro:expand* x)))
+(define (defmacro:expand* x)
+  (require 'defmacroexpand) (apply defmacro:expand* x '()))
+
+(define (defmacro:load <pathname>)
+  (slib:eval-load <pathname> defmacro:eval))
+
+(define (slib:eval-load <pathname> evl)
+  (if (not (file-exists? <pathname>))
+      (set! <pathname> (string-append <pathname> (scheme-file-suffix))))
+  (call-with-input-file <pathname>
+    (lambda (port)
+      (let ((old-load-pathname *load-pathname*))
+	(set! *load-pathname* <pathname>)
+	(do ((o (read port) (read port)))
+	    ((eof-object? o))
+	  (evl o))
+	(set! *load-pathname* old-load-pathname)))))
+
+;; define an error procedure for the library
+(define SLIB:ERROR error)
+
+;; define these as appropriate for your system.
+(define slib:tab (integer->char 9))
+(define slib:form-feed (integer->char 12))
+
+(define (1+ n) (+ n 1))
+(define (-1+ n) (- n 1))
+(define 1- -1+)
+
+(define in-vicinity string-append)
+
+;;; Define SLIB:EXIT to be the implementation procedure to exit or
+;;; return if exitting not supported.
+(define slib:exit (lambda args (exit)))
+
+;;; Here for backward compatability
+
+(define (scheme-file-suffix) ".scm")
+
+;;; (SLIB:LOAD-SOURCE "foo") should load "foo.scm" or with whatever
+;;; suffix all the module files in SLIB have.  See feature 'SOURCE.
+
+(define slib:load-source load)
+
+;;; (SLIB:LOAD-COMPILED "foo") should load the file that was produced
+;;; by compiling "foo.scm" if this implementation can compile files.
+;;; See feature 'COMPILED.
+
+(define slib:load-compiled load)
+
+;;; At this point SLIB:LOAD must be able to load SLIB files.
+
+(define slib:load slib:load-source)
+
+(slib:load (in-vicinity (library-vicinity) "require"))
+;;;			--- E O F ---