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+;;; "kawa.init" SLIB initialization for Kawa	-*-scheme-*-
+;;; Author: Aubrey Jaffer
+;;;
+;;; This code is in the public domain.
+
+;;@ (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) 'kawa)
+
+;;@ (scheme-implementation-home-page) should return a (string) URI
+;;; (Uniform Resource Identifier) for this scheme implementation's home
+;;; page; or false if there isn't one.
+(define (scheme-implementation-home-page)
+  "http://www.gnu.org/software/kawa")
+
+;;@ (scheme-implementation-version) should return a string describing
+;;; the version the scheme implementation loading this file.
+(define scheme-implementation-version scheme-implementation-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)
+  (case (software-type)
+    ((unix) "/usr/local/src/kawa/")
+    ;;((vms)	"scheme$src:")
+    ((ms-dos) "C:\\kawa\\")))
+
+;;@ (library-vicinity) should be defined to be the pathname of the
+;;; directory where files of Scheme library functions reside.
+(define library-vicinity
+  (let ((library-path
+	 (or
+	  ;; Use this getenv if your implementation supports it.
+	  ;;(getenv "SCHEME_LIBRARY_PATH")
+	  ;; Use this path if your scheme does not support GETENV
+	  ;; or if SCHEME_LIBRARY_PATH is not set.
+	  (case (software-type)
+	    ((unix) "/usr/local/lib/slib/")
+	    ((vms) "lib$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)
+  (let ((home ((primitive-static-method <java.lang.System> "getProperty"
+					<String> (<String>))
+	       'user.home)))
+    (and home
+	 (case (software-type)
+	   ((unix coherent ms-dos)	;V7 unix has a / on HOME
+	    (if (eqv? #\/ (string-ref home (+ -1 (string-length home))))
+		home
+		(string-append home "/")))
+	   (else home)))))
+
+;@
+(define in-vicinity string-append)
+;@
+(define (user-vicinity)
+  (case (software-type)
+    ((vms)	"[.]")
+    (else	"")))
+
+(define *load-pathname* #f)
+;@
+(define vicinity:suffix?
+  (let ((suffi
+	 (case (software-type)
+	   ((amiga)				'(#\: #\/))
+	   ((macos thinkc)			'(#\:))
+	   ((ms-dos windows atarist os/2)	'(#\\ #\/))
+	   ((nosve)				'(#\: #\.))
+	   ((unix coherent plan9)		'(#\/))
+	   ((vms)				'(#\: #\]))
+	   (else
+	    (slib:warn "require.scm" 'unknown 'software-type (software-type))
+	    "/"))))
+    (lambda (chr) (and (memv chr suffi) #t))))
+;@
+(define (pathname->vicinity pathname)
+  (let loop ((i (- (string-length pathname) 1)))
+    (cond ((negative? i) "")
+	  ((vicinity:suffix? (string-ref pathname i))
+	   (substring pathname 0 (+ i 1)))
+	  (else (loop (- i 1))))))
+(define (program-vicinity)
+  (if *load-pathname*
+      (pathname->vicinity *load-pathname*)
+      (slib:error 'program-vicinity " called; use slib:load to load")))
+;@
+(define sub-vicinity
+  (case (software-type)
+    ((vms) (lambda
+	       (vic name)
+	     (let ((l (string-length vic)))
+	       (if (or (zero? (string-length vic))
+		       (not (char=? #\] (string-ref vic (- l 1)))))
+		   (string-append vic "[" name "]")
+		   (string-append (substring vic 0 (- l 1))
+				  "." name "]")))))
+    (else (let ((*vicinity-suffix*
+		 (case (software-type)
+		   ((nosve) ".")
+		   ((macos thinkc) ":")
+		   ((ms-dos windows atarist os/2) "\\")
+		   ((unix coherent plan9 amiga) "/"))))
+	    (lambda (vic name)
+	      (string-append vic name *vicinity-suffix*))))))
+;@
+(define (make-vicinity <pathname>) <pathname>)
+;@
+(define with-load-pathname
+  (let ((exchange
+	 (lambda (new)
+	   (let ((old *load-pathname*))
+	     (set! *load-pathname* new)
+	     old))))
+    (lambda (path thunk)
+      (let ((old #f))
+	(dynamic-wind
+	    (lambda () (set! old (exchange path)))
+	    thunk
+	    (lambda () (exchange old)))))))
+
+;;@ SLIB:FEATURES is a list of symbols naming the (SLIB) features
+;;; initially supported by this implementation.
+(define slib:features
+      '(
+	source				;can load scheme source files
+					;(SLIB:LOAD-SOURCE "filename")
+;;;	compiled			;can load compiled files
+					;(SLIB:LOAD-COMPILED "filename")
+	vicinity
+	srfi-59
+
+		       ;; Scheme report features
+   ;; R5RS-compliant implementations should provide all 9 features.
+
+	r5rs				;conforms to
+	eval				;R5RS two-argument eval
+	values				;R5RS multiple values
+	dynamic-wind			;R5RS dynamic-wind
+	macro				;R5RS high level macros
+	delay				;has DELAY and FORCE
+	multiarg-apply			;APPLY can take more than 2 args.
+	char-ready?
+	rev4-optional-procedures	;LIST-TAIL, STRING-COPY,
+					;STRING-FILL!, and VECTOR-FILL!
+
+      ;; These four features are optional in both R4RS and R5RS
+
+	multiarg/and-			;/ and - can take more than 2 args.
+	rationalize
+	transcript			;TRANSCRIPT-ON and TRANSCRIPT-OFF
+	with-file			;has WITH-INPUT-FROM-FILE and
+					;WITH-OUTPUT-TO-FILE
+
+	r4rs				;conforms to
+	ieee-p1178			;conforms to
+	r3rs				;conforms to
+
+;;;	rev2-procedures			;SUBSTRING-MOVE-LEFT!,
+					;SUBSTRING-MOVE-RIGHT!,
+					;SUBSTRING-FILL!,
+					;STRING-NULL?, APPEND!, 1+,
+					;-1+, <?, <=?, =?, >?, >=?
+;;;	object-hash			;has OBJECT-HASH
+
+;;;	full-continuation		;can return multiple times
+;;;	ieee-floating-point		;conforms to IEEE Standard 754-1985
+					;IEEE Standard for Binary
+					;Floating-Point Arithmetic.
+
+			;; Other common features
+
+	srfi				;srfi-0, COND-EXPAND finds all srfi-*
+;;;	sicp				;runs code from Structure and
+					;Interpretation of Computer
+					;Programs by Abelson and Sussman.
+	defmacro			;has Common Lisp DEFMACRO
+	record				;has user defined data structures
+	string-port			;has CALL-WITH-INPUT-STRING and
+					;CALL-WITH-OUTPUT-STRING
+	fluid-let
+;;;	sort
+;;;	pretty-print
+;;;	object->string
+	format				;Common-lisp output formatting
+	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)
+;;;	current-time			;returns time in seconds since 1/1/1970
+
+		  ;; Implementation Specific features
+
+	))
+
+;;@ (FILE-POSITION <port> . <k>)
+(define (file-position . args) #f)
+
+;;@ (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) #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 #xFFFFFFFF)
+
+;;@ Return argument
+(define (identity x) x)
+
+;;@ 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)
+  (slib:require 'defmacroexpand) (apply defmacro:expand* x '()))
+;@
+(define (defmacro:load <pathname>)
+  (slib:eval-load <pathname> defmacro:eval))
+;; slib:eval-load definition moved to "require.scm"
+;@
+(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 #\space cep) (write x cep)) args)
+      (newline cep))))
+
+;;@ define an error procedure for the library
+(define slib:error
+  (let ((error error))
+    (lambda args
+      (if (provided? 'trace) (print-call-stack (current-error-port)))
+      (apply error args))))
+;@
+(define (make-exchanger obj)
+  (lambda (rep) (let ((old obj)) (set! obj rep) old)))
+(define (open-file filename modes)
+  (case modes
+    ((r rb) (open-input-file filename))
+    ((w wb) (open-output-file filename))
+    (else (slib:error 'open-file 'mode? modes))))
+(define (port? obj) (or (input-port? obj) (output-port? obj)))
+(define (call-with-open-ports . ports)
+  (define proc (car ports))
+  (cond ((procedure? proc) (set! ports (cdr ports)))
+	(else (set! ports (reverse ports))
+	      (set! proc (car ports))
+	      (set! ports (reverse (cdr ports)))))
+  (let ((ans (apply proc ports)))
+    (for-each close-port ports)
+    ans))
+(define (close-port port)
+  (cond ((input-port? port)
+	 (close-input-port port)
+	 (if (output-port? port) (close-output-port port)))
+	((output-port? port) (close-output-port port))
+	(else (slib:error 'close-port 'port? port))))
+;@
+(define (browse-url url)
+  (define (try cmd end) (zero? (system (string-append cmd url end))))
+  (or (try "netscape-remote -remote 'openURL(" ")'")
+      (try "netscape -remote 'openURL(" ")'")
+      (try "netscape '" "'&")
+      (try "netscape '" "'")))
+
+;;@ 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 SLIB:EXIT to be the implementation procedure to exit or
+;;; return if exiting 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"))