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libscheme.init
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libscheme.init
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;;;; Template for configuration of *features* for Scheme -*-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.
;;; (software-type) should be set to the generic operating system type.
;;; UNIX, VMS, MACOS, AMIGA and MSDOS are supported.
(define (software-type) 'UNIX)
;;; *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,
;LIST->STRING, STRING-COPY,
;STRING-FILL!, LIST->VECTOR,
;VECTOR->LIST, and VECTOR-FILL!
; rev3-procedures ;LAST-PAIR, T, and NIL
; rev2-procedures ;SUBSTRING-MOVE-LEFT!,
;SUBSTRING-MOVE-RIGHT!,
;SUBSTRING-FILL!,
;STRING-NULL?, APPEND!, 1+,
;-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
;WITH-OUTPUT-FROM-FILE
; string-port ;has CALL-WITH-INPUT-STRING and
;CALL-WITH-OUTPUT-STRING
; transcript ;TRANSCRIPT-ON and TRANSCRIPT-OFF
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
; 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)
;;; (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))
(string-append "slib_" (number->string cntr)))))
;;; (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)
(flush-output (if (null? arg) (current-output-port) (car arg))))
;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string
;;; port versions of CALL-WITH-*PUT-FILE.
;;; 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 #x7FFFFFFF)
;;; 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 *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>)
(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))
(defmacro:eval 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 these if your implementation's syntax can support it and if
;;; they are not already defined.
;(define (1+ n) (+ n 1))
;(define (-1+ n) (+ n -1))
;(define 1- -1+)
;;; (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/")
((UNIX) "/jade2/ccg/brent/misc/libscheme/")
((VMS) "scheme$src:")
((MSDOS) "C:\\scheme\\")))
;;; (library-vicinity) should be defined to be the pathname of the
;;; directory where files of Scheme library functions reside.
(define library-vicinity
(let ((library-path
(or (and (memq 'getenv *features*)
(getenv "SCHEME_LIBRARY_PATH"))
;;; Uses this path if your scheme does not support GETENV.
(case (software-type)
; ((UNIX) "/usr/local/lib/slib/")
((UNIX) "/amb9/lp/brent/lib/slib/")
((VMS) "lib$scheme:")
((MSDOS) "C:\\SLIB\\")
(else "")))))
(lambda () library-path)))
(define in-vicinity string-append)
;;; 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 f) (load (string-append f ".scm")))
;;; (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"))