home *** CD-ROM | disk | FTP | other *** search
- ;;;"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 ---
-