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- ;;;"mitscheme.init" Initialization for SLIB for MITScheme -*-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.
-
- ;;; Make this part of your ~/.scheme.init file.
-
- ;;; (software-type) should be set to the generic operating system type.
- (define (software-type) 'UNIX)
-
- ;;; (scheme-implementation-type) should return the name of the scheme
- ;;; implementation loading this file.
-
- (define (scheme-implementation-type) 'MITScheme)
-
- ;;; (scheme-implementation-version) should return a string describing
- ;;; the version the scheme implementation loading this file.
-
- (define (scheme-implementation-version) "7.3.0")
-
- ;;; *features* should be set to a list of symbols describing features
- ;;; of this implementation. See Template.scm for the list of feature
- ;;; names.
-
- ;the following may not be the Right Thing for this application, since
- ;it causes an error (rather than just returning nil) when the environment
- ;variable is not defined.
- (define getenv get-environment-variable)
-
- ;;; (implementation-vicinity) should be defined to be the pathname of
- ;;; the directory where any auxillary files to your Scheme
- ;;; implementation reside.
-
- (define (implementation-vicinity)
- (case (software-type)
- ((UNIX) "/usr/local/src/scheme/")
- ((VMS) "scheme$src:")))
-
- ;;; (library-vicinity) should be defined to be the pathname of the
- ;;; directory where files of Scheme library functions reside.
-
- (define library-vicinity
- (let ((library-path
- (or (getenv "SCHEME_LIBRARY_PATH")
- ;; Use this path if your scheme does not support GETENV.
- (case (software-type)
- ((UNIX) "/usr/local/lib/slib/")
- ((VMS) "lib$scheme:")
- ((MS-DOS) "C:\\SLIB\\")
- (else "")))))
- (lambda () library-path)))
-
- (define *features*
- '(
- 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
- rationalize
- object-hash
- delay
- with-file
- string-port
- transcript
- char-ready?
- record
- values
- dynamic-wind
- ieee-floating-point
- full-continuation
- ; sort
- queue
- pretty-print
- object->string
- trace ;has macros: TRACE and UNTRACE
- compiler
- getenv
- Xwindows
- ))
-
- ;;; (OUTPUT-PORT-WIDTH <port>)
- (define output-port-width output-port/x-size)
-
- ;;; (OUTPUT-PORT-HEIGHT <port>)
- (define (output-port-height . arg) 24)
-
- ;;; (CURRENT-ERROR-PORT)
- (define current-error-port
- (let ((port console-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.
- (define force-output flush-output)
- ;;; MITScheme 7.2 is missing flush-output. Use this instead
- ;(define (force-output . arg) #t)
-
- ;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string
- ;;; port versions of CALL-WITH-*PUT-FILE.
- (define (call-with-output-string proc)
- (let ((co (current-output-port)))
- (with-output-to-string
- (lambda ()
- (let ((port (current-output-port)))
- (with-output-to-port co
- (lambda () (proc port))))))))
-
- (define (call-with-input-string string proc)
- (let ((ci (current-input-port)))
- (with-input-from-string string
- (lambda ()
- (let ((port (current-input-port)))
- (with-input-from-port ci
- (lambda () (proc port))))))))
-
- (define object->string write-to-string)
-
- ;;; CHAR-CODE-LIMIT is one greater than the largest integer which can
- ;;; be returned by CHAR->INTEGER. It is defined by MITScheme.
-
- ;;; MOST-POSITIVE-FIXNUM is used in modular.scm
- (define most-positive-fixnum #x03FFFFFF)
-
- ;;; 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 form) (eval form (repl/environment (nearest-repl))))
- (define (slib:eval form) (eval form user-initial-environment))
-
- (define *macros* '(defmacro))
- (define (defmacro? m) (and (memq m *macros*) #t))
-
- (syntax-table-define system-global-syntax-table 'defmacro
- (macro defmacargs
- (let ((macname (car defmacargs)) (macargs (cadr defmacargs))
- (macbdy (cddr defmacargs)))
- `(begin
- (set! *macros* (cons ',macname *macros*))
- (syntax-table-define system-global-syntax-table ',macname
- (macro ,macargs ,@macbdy))))))
-
- (define (macroexpand-1 e)
- (if (pair? e) (let ((a (car e)))
- (if (and (symbol? a) (defmacro? a))
- (apply (syntax-table-ref system-global-syntax-table a)
- (cdr e))
- e))
- e))
-
- (define (macroexpand e)
- (if (pair? e) (let ((a (car e)))
- (if (and (symbol? a) (defmacro? a))
- (macroexpand
- (apply (syntax-table-ref system-global-syntax-table a)
- (cdr e)))
- 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 defmacro:eval slib:eval)
- (define defmacro:load load)
- ;;; If your implementation provides R4RS macros:
- ;(define macro:eval slib:eval)
- ;(define macro:load load)
-
- (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 record-modifier record-updater) ;some versions need this?
-
- ;; define an error procedure for the library
- (define (slib:error . args)
- (apply error-procedure (append args (list (the-environment)))))
-
- ;; define these as appropriate for your system.
- (define slib:tab (integer->char 9))
- (define slib:form-feed (integer->char 12))
-
- (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
- (cond ((null? args) (exit))
- ((eqv? #t (car args)) (exit))
- ((and (number? (car args)) (integer? (car args))) (exit (car args)))
- (else (exit 1)))))
-
- ;;; Here for backward compatability
-
- (define (scheme-file-suffix) "")
-
- ;;; (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"))
-