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1996-09-27 06:29:02 -04:00
;;;; Template for configuration of *features* for STk -*-scheme-*-
;;; Copyright (C) 1991, 1992, 1993 Aubrey Jaffer.
;; Author Erick Gallesio (
(require "unix")
;;; (software-type) should be set to the generic operating system type.
;;; UNIX, VMS, MACOS, AMIGA and MSDOS are supported.
(define (software-type) 'UNIX)
;;; (scheme-implementation-type) should return the name of the scheme
;;; implementation loading this file.
(define (scheme-implementation-type) '|STk|)
;;; (scheme-implementation-version) should return a string describing
;;; the version the scheme implementation loading this file.
(define (scheme-implementation-version) (version))
;;; (implementation-vicinity) should be defined to be the pathname of
;;; the directory where any auxillary files to your Scheme
;;; implementation reside.
(define (implementation-vicinity) "/usr/local/lib/stk/")
;;; (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") "/usr/local/lib/slib/")))
(lambda () library-path)))
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(define home-vicinity
(let ((home-path (or (getenv "HOME") "/")))
(lambda () home-path)))
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;;; *FEATURES* should be set to a list of symbols describing features
;;; of this implementation. Suggestions for features are:
(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
; rev3-report ;conforms to
; ieee-p1178 ;conforms to
; sicp ;runs code from Structure and
;Interpretation of Computer
;Programs by Abelson and Sussman.
rev4-optional-procedures ;LIST-TAIL, STRING->LIST,
; rev3-procedures ;LAST-PAIR, T, and NIL
; rev2-procedures ;SUBSTRING-MOVE-LEFT!,
;-1+, <?, <=?, =?, >?, >=?
multiarg/and- ;/ and - can take more than 2 args.
multiarg-apply ;APPLY can take more than 2 args.
; rationalize
delay ;has DELAY and FORCE
with-file ;has WITH-INPUT-FROM-FILE and
string-port ;has CALL-WITH-INPUT-STRING and
; char-ready?
; macro ;has R4RS high level macros
; defmacro ;has Common Lisp DEFMACRO
eval ;SLIB:EVAL is single argument eval
; record ;has user defined data structures
; values ;proposed multiple values
dynamic-wind ;proposed dynamic-wind
ieee-floating-point ;conforms to
full-continuation ;can return multiple times
; object-hash ;has OBJECT-HASH
; sort ; commented because icomplete
; queue ;queues
; pretty-print
; object->string
; format
; compiler ;has (COMPILER)
ed ;(ED) is editor
system ;posix (system <string>)
getenv ;posix (getenv <string>)
; program-arguments ;returns list of strings (argv)
; Xwindows ;X support
; curses ;screen management package
; termcap ;terminal description package
; terminfo ;sysV terminal description
;;; (OUTPUT-PORT-WIDTH <port>)
(define (output-port-width . arg) 79)
(define (output-port-height . arg) 24)
;;; (TMPNAM) makes a temporary file name.
(define tmpnam (let ((cntr 100))
(lambda () (set! cntr (+ 1 cntr))
(string-append "slib_" (number->string cntr)))))
;;; (DELETE-FILE <string>)
(define (delete-file f) (system (format #f "/bin/rm ~A" 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) (apply flush arg))
;;; 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 #x0fffffff)
;;; If your implementation provides eval SLIB:EVAL is single argument
;;; eval using the top-level (user) environment.
(define slib:eval eval)
;;; If your implementation provides R4RS macros:
;(define macro:eval slib:eval)
;(define macro:load load)
(define *macros* '())
(define-macro (defmacro name args . body)
(define-macro (,name ,@args) ,@body)
(set! *macros* (cons ,name *macros*))))
(define (defmacro? m) (and (memv m *macros*) #t))
(define macroexpand-1 MACRO-EXPAND-1)
(define macroexpand MACRO-EXPAND)
(define gentemp GENSYM)
(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 . args)
(error (apply string-append (map (lambda (x) (format #f " ~a" x)) args))))
;;; define these as appropriate for your system.
(define slib:tab (integer->char 9))
(define slib:form-feed (integer->char 12))
;;; Define these if your implementation's syntax can support it and if
;;; they are not already defined.
(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 exit)
;;; Here for backward compatability
(define scheme-file-suffix
(let ((suffix (case (software-type)
((NOSVE) "_scm")
(else ".scm"))))
(lambda () 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)
;;; Retain original require/provide before loading "require.scm"
(define stk:require require)
(define stk:provide provide)
(define stk:provided? provided?)
(define slib:load slib:load-source)
(slib:load (in-vicinity (library-vicinity) "require"))
;;; Redefine require/provide so that symbols use SLIB one and strings use STk one
(define require
(let ((slib:require require))
(lambda (item)
((if (symbol? item) slib:require stk:require) item ))))
(define provide
(let ((slib:provide provide))
(lambda (item)
((if (symbol? item) slib:provide stk:provide) item))))
(define provided?
(let ((slib:provided? provided?))
(lambda (item)
((if (symbol? item) slib:provided? stk:provided?) item))))
(define identity (lambda (x) x))