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Merge from stable-2.2

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Andy Wingo 2019-08-02 15:04:14 +02:00
commit 663b26819e
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21
doc/ref/r6rs.texi
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@ -1,7 +1,7 @@
@c -*-texinfo-*-
@c This is part of the GNU Guile Reference Manual.
@c Copyright (C) 2010, 2011, 2012, 2013,
@c 2014 Free Software Foundation, Inc.
@c 2014, 2019 Free Software Foundation, Inc.
@c See the file guile.texi for copying conditions.
@node R6RS Support
@ -1680,9 +1680,22 @@ Return a transcoder associated with the encoding of @var{port}.
@end deffn
@deffn {Scheme Procedure} binary-port? port
@deffnx {Scheme Procedure} textual-port? port
Return @code{#t}, as all ports in Guile are suitable for binary and
textual I/O. @xref{Encoding}, for more details.
Return @code{#t} if @var{port} appears to be a binary port, else return
@code{#f}. Note that Guile does not currently distinguish between
binary and textual ports, so this predicate is not a reliable indicator
of whether the port was created as a binary port. Currently, it returns
@code{#t} if and only if the port encoding is ``ISO-8859-1'', because
Guile uses this encoding when creating a binary port. @xref{Encoding},
for more details.
@end deffn
@deffn {Scheme Procedure} textual-port? port
Return @code{#t} if @var{port} appears to be a textual port, else return
@code{#f}. Note that Guile does not currently distinguish between
binary and textual ports, so this predicate is not a reliable indicator
of whether the port was created as a textual port. Currently, it always
returns @code{#t}, because all ports can be used for textual I/O in
Guile. @xref{Encoding}, for more details.
@end deffn
@deffn {Scheme Procedure} transcoded-port binary-port transcoder

18
module/rnrs/io/ports.scm
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@ -1,6 +1,6 @@
;;;; ports.scm --- R6RS port API -*- coding: utf-8 -*-
;;;; Copyright (C) 2009, 2010, 2011, 2013 Free Software Foundation, Inc.
;;;; Copyright (C) 2009-2011, 2013, 2019 Free Software Foundation, Inc.
;;;;
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
@ -269,13 +269,21 @@ if the port has no transcoder."
"unsupported error handling mode"))))))
(define (binary-port? port)
"Always returns @code{#t}, as all ports can be used for binary I/O in
Guile."
"Return @code{#t} if @var{port} appears to be a binary port, else
return @code{#f}. Note that Guile does not currently distinguish
between binary and textual ports, so this predicate is not a reliable
indicator of whether the port was created as a binary port. Currently,
it returns @code{#t} if and only if the port encoding is ``ISO-8859-1'',
because Guile uses this encoding when creating a binary port."
(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
Guile."
"Return @code{#t} if @var{port} appears to be a textual port, else
return @code{#f}. Note that Guile does not currently distinguish
between binary and textual ports, so this predicate is not a reliable
indicator of whether the port was created as a textual port. Currently,
it always returns @code{#t}, because all ports can be used for textual
I/O in Guile."
#t)
(define (port-eof? port)