diff options
Diffstat (limited to 'elk.init')
| -rw-r--r-- | elk.init | 69 |
1 files changed, 47 insertions, 22 deletions
@@ -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")) |