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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/lib/umb-scheme/")
+ ((VMS) "scheme$src:")
+ ((MS-DOS) "C:\\scheme\\")))
+
+;;; (library-vicinity) should be defined to be the pathname of the
+;;; directory where files of Scheme library functions reside.
+
+(define library-vicinity
+ (let ((library-path
+ (or
+ ;; Use this getenv if your implementation supports it.
+ ;;(getenv "SCHEME_LIBRARY_PATH")
+ ;; Use this path if your scheme does not support GETENV
+ ;; or if SCHEME_LIBRARY_PATH is not set.
+ (case (software-type)
+ ((UNIX) "/usr/lib/umb-scheme/slib/")
+ ((VMS) "lib$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.
+
+;;; 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 ((port (current-error-port)))
+ (display "Warn: " port)
+ (for-each (lambda (x) (display x port)) args))))
+
+;;; 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))
+
+;;; 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"))