diff options
Diffstat (limited to 'umbscheme.init')
| -rw-r--r-- | umbscheme.init | 50 |
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")) |