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-rw-r--r--vscm.init66
1 files changed, 45 insertions, 21 deletions
diff --git a/vscm.init b/vscm.init
index b45fa7e..840df39 100644
--- a/vscm.init
+++ b/vscm.init
@@ -36,30 +36,25 @@
;;; (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) 'Vscm)
;;; (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.cs.princeton.edu/~blume/vscm/vscm.html")
;;; (scheme-implementation-version) should return a string describing the
;;; version the scheme implementation loading this file.
-
(define (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/scheme/")
@@ -68,7 +63,6 @@
;;; (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 (getenv "SCHEME_LIBRARY_PATH")
@@ -83,14 +77,18 @@
;;; (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
@@ -100,7 +98,7 @@
;; Scheme report features
-; rev5-report ;conforms to
+; r5rs ;conforms to
; eval ;R5RS 2-argument eval
values ;R5RS multiple values
; dynamic-wind ;R5RS dynamic-wind
@@ -114,11 +112,11 @@
;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!,
@@ -129,7 +127,7 @@
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
@@ -191,7 +189,6 @@
;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string
;;; port versions of CALL-WITH-*PUT-FILE.
-
(define (call-with-output-string proc)
(let ((outsp (open-output-string)))
(proc outsp)
@@ -203,6 +200,37 @@
(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) (eqv? 0 (system (sprintf #f cmd url))))
+ (or (try "netscape-remote -remote 'openURL(%s)'")
+ (try "netscape -remote 'openURL(%s)'")
+ (try "netscape '%s'&")
+ (try "netscape '%s'")))
+
;;; Implementation of string ports using generic ports
(define (open-input-string s)
@@ -339,7 +367,7 @@
(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 . argl)
@@ -357,7 +385,6 @@
;;; 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+)
@@ -382,17 +409,14 @@
;;; (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 (scheme-file-suffix))))
;;; (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"))