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- ;;;"scheme48.init" Initialisation for SLIB for Scheme48 -*-scheme-*-
- ;;; Copyright (C) 1992, 1993, 1994, 1995 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.
-
- ;;; If you know the magic incantation to make a "," command available
- ;;; as a scheme procedure, you can make a nifty slib function to do
- ;;; this (like `slib:dump' in "vscm.init"). But for now, type:
- ;;; make slib48
-
- ;;; (software-type) should be set to the generic operating system type.
- ;;; UNIX, VMS, MACOS, AMIGA and MS-DOS are supported.
-
- (define (software-type) 'UNIX)
-
- ;;; (scheme-implementation-type) should return the name of the scheme
- ;;; implementation loading this file.
-
- (define (scheme-implementation-type) 'Scheme48)
-
- ;;; (scheme-implementation-version) should return a string describing
- ;;; the version the scheme implementation loading this file.
-
- (define (scheme-implementation-version) "0.36")
-
- ;;; (implementation-vicinity) should be defined to be the pathname of
- ;;; the directory where any auxiliary files to your Scheme
- ;;; implementation reside.
- ; For scheme48, perhaps something like /usr/local/src/scheme48/misc/ ?
-
- (define (implementation-vicinity)
- (case (software-type)
- ((UNIX) "=scheme48/") ; Translated
- (else (slib:error "unrecognized software-type" software-type))))
-
- ;;; (library-vicinity) should be defined to be the pathname of the
- ;;; directory where files of Scheme library functions reside.
-
- (define (library-vicinity) "/usr/local/lib/slib/")
-
- ;;; *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*
- '(
- source ;can load scheme source files
- ;(slib:load-source "filename")
- ; compiled ;can load compiled files
- ;(slib:load-compiled "filename")
- rev4-report ;conforms to
- ieee-p1178 ;conforms to
- rev4-optional-procedures
- multiarg/and-
- multiarg-apply
- rationalize
- delay ;has delay and force
- with-file
- char-ready? ;has
- values ;proposed multiple values
- eval ;slib:eval is single argument eval.
- dynamic-wind ;proposed dynamic-wind
- full-continuation ;can return multiple times
- macro ;R4RS appendix's DEFINE-SYNTAX
- ))
-
- ;;; (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
- (access-scheme-48 'error-output-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)))))
-
- ;;; (FILE-EXISTS? <string>)
- (define (file-exists? f) #f)
-
- ;;; (DELETE-FILE <string>)
- (define (delete-file f) #f)
-
- ;;; 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)
- ((access-scheme-48 'force-output)
- (if (null? arg) (current-output-port) (car arg))))
-
- ;;; CHAR-CODE-LIMIT is one greater than the largest integer which can
- ;;; be returned by CHAR->INTEGER.
- (define integer->char (access-scheme-48 'ascii->char))
- (define char->integer
- (let ((char->integer char->integer)
- (code0 (char->integer (integer->char 0))))
- (lambda (char) (- (char->integer char) code0))))
- (define char-code-limit 256)
-
- ;;; Workaround MODULO bug
- (define modulo
- (let ((modulo modulo))
- (lambda (n1 n2)
- (let ((ans (modulo n1 n2)))
- (if (= ans n2) (- ans ans) ans)))))
-
- ;;; MOST-POSITIVE-FIXNUM is used in modular.scm
- (define most-positive-fixnum #x1FFFFFFF)
-
- ;;; 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
- (let ((eval eval)
- (interaction-environment interaction-environment))
- (lambda (form)
- (eval form (interaction-environment)))))
-
- ;;; 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 (access-scheme-48 'error))
-
- ;;; define these as appropriate for your system.
- (define slib:tab (integer->char 9))
- (define slib:form-feed (integer->char 12))
-
- ;;; Support for older versions of Scheme. Not enough code for its own file.
- (define (last-pair l) (if (pair? (cdr l)) (last-pair (cdr l)) l))
- (define t #t)
- (define nil #f)
-
- ;;; Define these if your implementation's syntax can support them and if
- ;;; they are not already defined.
-
- (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 #f))
-
- ;;; Here for backward compatability
- (define scheme-file-suffix
- (case (software-type)
- ((NOSVE) (lambda () "_scm"))
- (else (lambda () ".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 f) (load (string-append f (scheme-file-suffix))))
-
- ;;; (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"))
-