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author | Ludovic Courtès <ludo@gnu.org> | 2009-05-27 18:18:07 +0200 |
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committer | Ludovic Courtès <ludo@gnu.org> | 2009-05-28 23:12:01 +0200 |
commit | 1ee2c72eafaae5f91f4c899bc4b4853af5c16f28 (patch) | |
tree | bdb474d8adc13a6b99358c8d79d988fdbd7401a7 /module/rnrs/io | |
parent | 24d56127bb0f07bcb477e2c73ccc3cac0c51ee73 (diff) | |
download | guile-1ee2c72eafaae5f91f4c899bc4b4853af5c16f28.tar.gz |
Import R6RS bytevectors and I/O ports from Guile-R6RS-Libs 0.2.
* README: Document dependency on GNU libunistring.
* benchmark-suite/Makefile.am (SCM_BENCHMARKS): Add
`benchmark/bytevectors.bm'.
* configure.in: Make sure we have libunistring; update $LIBS.
* libguile.h: Include "bytevectors.h" and "r6rs-ports.h".
* libguile/Makefile.am (libguile_la_SOURCES): Add `bytevectors.c' and
`r6rs-ports.c'
(DOT_X_FILES): Add `bytevectors.x' and `r6rs-ports.x'.
(DOT_DOC_FILES): Add `bytevectors.doc' and `r6rs-ports.doc'.
(noinst_HEADERS): Add `ieee-754.h'.
(modinclude_HEADERS): Add `bytevectors.h' and `r6rs-ports.h'
* libguile/validate.h (SCM_VALIDATE_BYTEVECTOR): New macro.
* module/Makefile.am (SOURCES): Add $(RNRS_SOURCES).
(RNRS_SOURCES): New variable.
* test-suite/Makefile.am (SCM_TESTS): Add `bytevectors.test' and
`r6rs-ports.test'.
Diffstat (limited to 'module/rnrs/io')
-rw-r--r-- | module/rnrs/io/ports.scm | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/module/rnrs/io/ports.scm b/module/rnrs/io/ports.scm new file mode 100644 index 000000000..73843ee55 --- /dev/null +++ b/module/rnrs/io/ports.scm @@ -0,0 +1,111 @@ +;;;; ports.scm --- R6RS port API + +;;;; Copyright (C) 2009 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 +;;;; License as published by the Free Software Foundation; either +;;;; version 2.1 of the License, or (at your option) any later version. +;;;; +;;;; This library is distributed in the hope that it will be useful, +;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +;;;; Lesser General Public License for more details. +;;;; +;;;; You should have received a copy of the GNU Lesser General Public +;;;; License along with this library; if not, write to the Free Software +;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + +;;; Author: Ludovic Courtès <ludo@gnu.org> + +;;; Commentary: +;;; +;;; The I/O port API of the R6RS is provided by this module. In many areas +;;; it complements or refines Guile's own historical port API. For instance, +;;; it allows for binary I/O with bytevectors. +;;; +;;; Code: + +(define-module (rnrs io ports) + :re-export (eof-object? port? input-port? output-port?) + :export (eof-object + + ;; input & output ports + port-transcoder binary-port? transcoded-port + port-position set-port-position! + port-has-port-position? port-has-set-port-position!? + call-with-port + + ;; input ports + open-bytevector-input-port + make-custom-binary-input-port + + ;; binary input + get-u8 lookahead-u8 + get-bytevector-n get-bytevector-n! + get-bytevector-some get-bytevector-all + + ;; output ports + open-bytevector-output-port + make-custom-binary-output-port + + ;; binary output + put-u8 put-bytevector)) + +(load-extension "libguile" "scm_init_r6rs_ports") + + + +;;; +;;; Input and output ports. +;;; + +(define (port-transcoder port) + (error "port transcoders are not supported" port)) + +(define (binary-port? port) + ;; So far, we don't support transcoders other than the binary transcoder. + #t) + +(define (transcoded-port port) + (error "port transcoders are not supported" port)) + +(define (port-position port) + "Return the offset (an integer) indicating where the next octet will be +read from/written to in @var{port}." + + ;; FIXME: We should raise an `&assertion' error when not supported. + (seek port 0 SEEK_CUR)) + +(define (set-port-position! port offset) + "Set the position where the next octet will be read from/written to +@var{port}." + + ;; FIXME: We should raise an `&assertion' error when not supported. + (seek port offset SEEK_SET)) + +(define (port-has-port-position? port) + "Return @code{#t} is @var{port} supports @code{port-position}." + (and (false-if-exception (port-position port)) #t)) + +(define (port-has-set-port-position!? port) + "Return @code{#t} is @var{port} supports @code{set-port-position!}." + (and (false-if-exception (set-port-position! port (port-position port))) + #t)) + +(define (call-with-port port proc) + "Call @var{proc}, passing it @var{port} and closing @var{port} upon exit of +@var{proc}. Return the return values of @var{proc}." + (dynamic-wind + (lambda () + #t) + (lambda () + (proc port)) + (lambda () + (close-port port)))) + +;;; Local Variables: +;;; coding: latin-1 +;;; End: + +;;; ports.scm ends here |