diff options
Diffstat (limited to 'pscheme.init')
| -rw-r--r-- | pscheme.init | 44 |
1 files changed, 36 insertions, 8 deletions
diff --git a/pscheme.init b/pscheme.init index 841f191..b791df6 100644 --- a/pscheme.init +++ b/pscheme.init @@ -2,7 +2,7 @@ ;;; Author: Ben Goetter <goetter@mazama.net> ;;; last revised for 1.1.0 on 16 October 2000 ;;; Initial work for 0.2.3 by Robert Goldman (goldman@htc.honeywell.com) -;;; SLIB orig Author: Aubrey Jaffer (jaffer@ai.mit.edu) +;;; SLIB orig Author: Aubrey Jaffer (agj @ alum.mit.edu) ;;; ;;; This code is in the public domain. @@ -38,7 +38,7 @@ ;; Scheme report features -; rev5-report ;conforms to +; r5rs ;conforms to eval ;R5RS two-argument eval ; values ;R5RS multiple values dynamic-wind ;R5RS dynamic-wind @@ -52,11 +52,11 @@ ;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!, @@ -67,7 +67,7 @@ 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 @@ -120,6 +120,37 @@ ;; pscheme: current-error-port, delete-file, force-output already defined +(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'"))) + ;;; CHAR-CODE-LIMIT is one greater than the largest integer which can ;;; be returned by CHAR->INTEGER. ;(define char-code-limit @@ -231,7 +262,6 @@ ;;; (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) (if (not (file-exists? f)) (set! f (string-append f (scheme-file-suffix)))) @@ -240,11 +270,9 @@ ;;; (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) ;;; Pscheme and SLIB both define REQUIRE, so dispatch on argument type. |