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- ;;; "umbscheme.init" Initialization for SLIB for umb-scheme -*-scheme-*-
- ;;; Author: Aubrey Jaffer
- ;;;
- ;;; This code is in the public domain.
-
- ; MODIFIED BY Bill Campbell for UMB Scheme.
-
- ; Further modified by Radey Shouman, for inclusion in SLIB.
-
- ;;; (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) 'umb-scheme)
-
- ;;; (scheme-implementation-home-page) should return a (string) URL
- ;;; (Uniform Resource Locator) for this scheme implementation's home
- ;;; page; or false if there isn't one.
-
- (define (scheme-implementation-home-page)
- "ftp://ftp.cs.umb.edu:/pub/scheme/")
-
- ;;; (scheme-implementation-version) should return a string describing
- ;;; the version the scheme implementation loading this file.
-
- (define (scheme-implementation-version) "3.2")
-
- ;;; (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/share/umb-scheme/")
- ((VMS) "scheme$src:")
- ((MS-DOS) "C:\\scheme\\")))
-
- ;;; (library-vicinity) should be defined to be the pathname of the
- ;;; directory where files of Scheme library functions reside.
-
- (define library-vicinity
- (let ((library-path
- (or
- ;; Use this getenv if your implementation supports it.
- ;;(getenv "SCHEME_LIBRARY_PATH")
- ;; Use this path if your scheme does not support GETENV
- ;; or if SCHEME_LIBRARY_PATH is not set.
- (case (software-type)
- ((UNIX) "/usr/share/umb-scheme/slib/")
- ((VMS) "lib$scheme:")
- ((MS-DOS) "C:\\SLIB\\")
- (else "")))))
- (lambda () library-path)))
-
- ;;; (home-vicinity) should return the vicinity of the user's HOME
- ;;; directory, the directory which typically contains files which
- ;;; customize a computer environment for a user.
-
- (define (home-vicinity) "")
-
- ;;; *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!
- ; 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
- ; trace ;has macros: TRACE and UNTRACE
- ; 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
- ; current-time ;returns time in seconds since 1/1/1970
- ))
-
- ;;; (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)
- (define file-exists?
- (case (software-type)
- ((UNIX)
- (lambda (f)
- (zero? (system (string-append "test -r " f)))))
- (else
- (lambda (f) #f))))
-
- ;;; (DELETE-FILE <string>)
- ;;(define (delete-file f) #f)
- (define delete-file
- (case (software-type)
- ((UNIX)
- (lambda (f)
- (zero? (system (string-append "rm " f)))))
- (else
- (lambda (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) #t)
-
- ;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string
- ;;; port versions of CALL-WITH-*PUT-FILE.
-
- ;;; "rationalize" adjunct procedures.
- (define (find-ratio x e)
- (let ((rat (rationalize x e)))
- (list (numerator rat) (denominator rat))))
- (define (find-ratio-between x y)
- (find-ratio (/ (+ x y) 2) (/ (- x y) 2)))
-
- ;;; 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 #x08000)
-
- ;;; 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)
-
- (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)
-
- (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 slib:warn
- (lambda args
- (let ((cep (current-error-port)))
- (if (provided? 'trace) (print-call-stack cep))
- (display "Warn: " cep)
- (for-each (lambda (x) (display x cep)) args))))
-
- ;;; define an error procedure for the library
- (define (slib:error . args)
- (if (provided? 'trace) (print-call-stack (current-error-port)))
- (apply error args))
-
- ;;; 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 it 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
- (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"))
-