(define (port-transcoder port)
"Return the transcoder object associated with @var{port}, or @code{#f}
if the port has no transcoder."
- (cond ((port-encoding port)
- => (lambda (encoding)
- (make-transcoder
- encoding
- (native-eol-style)
- (case (port-conversion-strategy port)
- ((error) 'raise)
- ((substitute) 'replace)
- (else
- (assertion-violation 'port-transcoder
- "unsupported error handling mode"))))))
- (else
- #f)))
+ (and (textual-port? port)
+ ;; All textual ports have transcoders.
+ (make-transcoder
+ (port-encoding port)
+ (native-eol-style)
+ (case (port-conversion-strategy port)
+ ((error) 'raise)
+ ((substitute) 'replace)
+ (else
+ (assertion-violation 'port-transcoder
+ "unsupported error handling mode"))))))
(define (binary-port? port)
- "Returns @code{#t} if @var{port} does not have an associated encoding,
-@code{#f} otherwise."
- (not (port-encoding port)))
+ "Always returns @code{#t}, as all ports can be used for binary I/O in
+Guile."
+ (equal? (port-encoding port) "ISO-8859-1"))
(define (textual-port? port)
"Always returns @code{#t}, as all ports can be used for textual I/O in
(put-string tp "The letter λ cannot be represented in Latin-1.")
#f))))
- (pass-if "port-transcoder [binary port]"
- (not (port-transcoder (open-bytevector-input-port #vu8()))))
-
(pass-if "port-transcoder [transcoded port]"
(let* ((p (transcoded-port (open-bytevector-input-port (string->utf8 "foo"))
(make-transcoder (utf-8-codec))))