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-rw-r--r--elk.init69
1 files changed, 47 insertions, 22 deletions
diff --git a/elk.init b/elk.init
index 598b935..13fde42 100644
--- a/elk.init
+++ b/elk.init
@@ -1,4 +1,4 @@
-;;;"elk.init" Initialisation file for SLIB for ELK 2.1 -*- Scheme -*-
+;;;"elk.init" Initialisation file for SLIB for ELK 3.0 -*- Scheme -*-
;;; Author: Aubrey Jaffer
;;;
;;; This code is in the public domain.
@@ -16,39 +16,33 @@
;;; (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) 'Elk)
;;; (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.informatik.uni-bremen.de/~net/elk/")
;;; (scheme-implementation-version) should return a string describing
;;; the version the scheme implementation loading this file.
-
(define (scheme-implementation-version) "3.0")
;;; (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/lib/elk-2.1/scm/")
+ ((UNIX) "/usr/local/lib/elk/runtime/scm/")
((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.
-
(require 'unix)
(define getenv unix-getenv)
(define system unix-system)
@@ -67,14 +61,18 @@
;;; (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-path (getenv "HOME")))
- (lambda () home-path)))
+(define (home-vicinity)
+ (let ((home (getenv "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)))))
;;; *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
@@ -84,7 +82,7 @@
;; Scheme report features
-; rev5-report ;conforms to
+; r5rs ;conforms to
; eval ;R5RS two-argument eval
; values ;R5RS multiple values
; dynamic-wind ;R5RS dynamic-wind
@@ -98,11 +96,11 @@
;STRING-FILL!, LIST->VECTOR,
;VECTOR->LIST, and VECTOR-FILL!
- rev4-report ;conforms to
+ r4rs ;conforms to
ieee-p1178 ;conforms to
-; rev3-report ;conforms to
+; r3rs ;conforms to
rev2-procedures ;SUBSTRING-MOVE-LEFT!,
;SUBSTRING-MOVE-RIGHT!,
@@ -113,7 +111,7 @@
multiarg/and- ;/ and - can take more than 2 args.
; with-file ;has WITH-INPUT-FROM-FILE and
- ;WITH-OUTPUT-FROM-FILE
+ ;WITH-OUTPUT-TO-FILE
transcript ;TRANSCRIPT-ON and TRANSCRIPT-OFF
; ieee-floating-point ;conforms to IEEE Standard 754-1985
;IEEE Standard for Binary
@@ -152,7 +150,6 @@
; EXACT? appears to always return #f which isn't very useful.
; Approximating it with INTEGER? at least means that some
; of the code in the library will work correctly
-
(define exact? integer?) ; WARNING: redefining EXACT?
(define (inexact? arg)
@@ -202,6 +199,37 @@
(close-input-port insp)
res))
+(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? port) (output-port? port)))
+(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 '" "'")))
+
;;; CHAR-CODE-LIMIT is one greater than the largest integer which can
;;; be returned by CHAR->INTEGER.
(define char-code-limit 256)
@@ -268,7 +296,7 @@
(let ((cep (current-error-port)))
(if (provided? 'trace) (print-call-stack cep))
(display "Warn: " cep)
- (for-each (lambda (x) (display x cep)) args))))
+ (for-each (lambda (x) (display #\ cep) (write x cep)) args))))
;;; define an error procedure for the library
(define slib:error
@@ -323,7 +351,6 @@
; _(global-environment)_ if none is explicitly specified.
; If this is not done, definitions in files loaded by other files will
; not be loaded in the correct environment.
-
(define slib:load-source
(let ((primitive-load load))
(lambda (<pathname> . rest)
@@ -333,14 +360,12 @@
;;; (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
(let ((primitive-load load))
(lambda (<pathname> . rest)
(apply primitive-load (string->symbol (string-append name ".o")) rest))))
;;; At this point SLIB:LOAD must be able to load SLIB files.
-
(define slib:load slib:load-source) ;WARNING: redefining LOAD
(slib:load (in-vicinity (library-vicinity) "require"))