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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 ---