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-rw-r--r--umbscheme.init50
1 files changed, 35 insertions, 15 deletions
diff --git a/umbscheme.init b/umbscheme.init
index 87c1638..605878c 100644
--- a/umbscheme.init
+++ b/umbscheme.init
@@ -9,30 +9,25 @@
;;; (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) 'umb-scheme)
;;; (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)
"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/")
@@ -41,7 +36,6 @@
;;; (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
@@ -59,20 +53,18 @@
;;; (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) "")
;;; *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
+; r4rs ;conforms to
+; r3rs ;conforms to
ieee-p1178 ;conforms to
; srfi ;srfi-0, COND-EXPAND finds all srfi-*
; sicp ;runs code from Structure and
@@ -92,7 +84,7 @@
rationalize
delay ;has DELAY and FORCE
with-file ;has WITH-INPUT-FROM-FILE and
- ;WITH-OUTPUT-FROM-FILE
+ ;WITH-OUTPUT-TO-FILE
; string-port ;has CALL-WITH-INPUT-STRING and
;CALL-WITH-OUTPUT-STRING
transcript ;TRANSCRIPT-ON and TRANSCRIPT-OFF
@@ -164,6 +156,37 @@
;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string
;;; port versions of CALL-WITH-*PUT-FILE.
+(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 '" "'")))
+
;;; "rationalize" adjunct procedures.
(define (find-ratio x e)
(let ((rat (rationalize x e)))
@@ -215,7 +238,7 @@
(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 . args)
@@ -253,17 +276,14 @@
;;; (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 ".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"))