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0f42fef119
* module/ice-9/binary-ports.scm (call-with-input-bytevector): (call-with-output-bytevector): New functions. * module/ice-9/iconv.scm: Remove superfluous copies of call-with-output-string* and call-with-output-bytevector*, now that the former closes the port and the latter exists. (call-with-encoded-output-string): Adapt. * module/web/uri.scm: Use (ice-9 iconv) instead of local bytevector/string conversion procedures.
73 lines
2.7 KiB
Scheme
73 lines
2.7 KiB
Scheme
;;; binary-ports.scm --- Binary IO on ports
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;;; Copyright (C) 2009-2011,2013,2016,2019,2021 Free Software Foundation, Inc.
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;;;
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;;; This library is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU Lesser General Public License as
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;;; published by the Free Software Foundation, either version 3 of the
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;;; License, or (at your option) any later version.
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;;;
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;;; This library is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;; Lesser General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU Lesser General Public
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;;; License along with this program. If not, see
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;;; <http://www.gnu.org/licenses/>.
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;;; Author: Ludovic Courtès <ludo@gnu.org>
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;;; Commentary:
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;;;
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;;; The I/O port API of the R6RS is provided by this module. In many areas
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;;; it complements or refines Guile's own historical port API. For instance,
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;;; it allows for binary I/O with bytevectors.
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;;;
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;;; Code:
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(define-module (ice-9 binary-ports)
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#:use-module (rnrs bytevectors)
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#:export (eof-object
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open-bytevector-input-port
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make-custom-binary-input-port
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get-u8
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lookahead-u8
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get-bytevector-n
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get-bytevector-n!
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get-bytevector-some
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get-bytevector-some! ; Guile extension, not in R6RS
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get-bytevector-all
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get-string-n!
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put-u8
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put-bytevector
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unget-bytevector
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open-bytevector-output-port
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make-custom-binary-output-port
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make-custom-binary-input/output-port
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call-with-input-bytevector
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call-with-output-bytevector))
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;; Note that this extension also defines %make-transcoded-port, which is
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;; not exported but is used by (rnrs io ports).
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(load-extension (string-append "libguile-" (effective-version))
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"scm_init_r6rs_ports")
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(define (call-with-input-bytevector bv proc)
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"Call the one-argument procedure @var{proc} with a newly created
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binary input port from which the bytevector @var{bv}'s contents may be
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read. All values yielded by @var{proc} are returned."
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(proc (open-bytevector-input-port bv)))
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(define (call-with-output-bytevector proc)
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"Call the one-argument procedure @var{proc} with a newly created
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binary output port. When the function returns, port is closed and the
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bytevector composed of the bytes written into the port is returned."
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(call-with-values
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(lambda ()
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(open-bytevector-output-port))
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(lambda (port get-bytevector)
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(proc port)
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(let ((bv (get-bytevector)))
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(close-port port)
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bv))))
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