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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 ---
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