136 lines
4.0 KiB
C
136 lines
4.0 KiB
C
/* ****************************************************************************
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* stream/open.c -- open a stream.
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* Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
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*
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* This file is part of libcasio.
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* libcasio is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 3.0 of the License,
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* or (at your option) any later version.
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*
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* libcasio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU 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 License
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* along with libcasio; if not, see <http://www.gnu.org/licenses/>.
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* ************************************************************************* */
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#include "stream.h"
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/**
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* casio_open_stream:
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* Open a libcasio stream.
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*
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* @arg pstream the stream to open.
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* @arg mode the open mode.
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* @arg cookie the stream cookie.
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* @arg callbacks the stream callbacks.
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* @arg ioff the initial offset.
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* @return the error code (0 if ok).
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*/
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int CASIO_EXPORT casio_open_stream(casio_stream_t **pstream,
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casio_openmode_t mode, void *cookie,
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const casio_streamfuncs_t *callbacks,
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casio_off_t ioff)
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{
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int err; casio_stream_t *stream = NULL;
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casio_streamfuncs_t *c;
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/* Allocate the stream. */
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*pstream = casio_alloc(1, sizeof(casio_stream_t));
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if (!(stream = *pstream)) {
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err = casio_error_alloc;
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goto fail;
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}
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/* Initialize the stream callbacks. */
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stream->casio_stream_mode = 0;
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c = &stream->casio_stream_callbacks;
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c->casio_streamfuncs_close = callbacks->casio_streamfuncs_close;
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if ((mode & CASIO_OPENMODE_READ) && callbacks->casio_streamfuncs_read) {
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stream->casio_stream_mode |= CASIO_OPENMODE_READ;
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c->casio_streamfuncs_read = callbacks->casio_streamfuncs_read;
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} else
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c->casio_streamfuncs_read = NULL;
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if ((mode & CASIO_OPENMODE_WRITE) && callbacks->casio_streamfuncs_write) {
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stream->casio_stream_mode |= CASIO_OPENMODE_WRITE;
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c->casio_streamfuncs_write = callbacks->casio_streamfuncs_write;
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} else
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c->casio_streamfuncs_write = NULL;
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if (mode & (CASIO_OPENMODE_READ | CASIO_OPENMODE_WRITE))
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c->casio_streamfuncs_seek = callbacks->casio_streamfuncs_seek;
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else
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c->casio_streamfuncs_seek = NULL;
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if ((mode & CASIO_OPENMODE_SERIAL)
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&& callbacks->casio_streamfuncs_setattrs) {
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stream->casio_stream_mode |= CASIO_OPENMODE_SERIAL;
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c->casio_streamfuncs_setattrs = callbacks->casio_streamfuncs_setattrs;
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} else
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c->casio_streamfuncs_setattrs = NULL;
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if ((mode & CASIO_OPENMODE_SCSI) && callbacks->casio_streamfuncs_scsi) {
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stream->casio_stream_mode |= CASIO_OPENMODE_SCSI;
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c->casio_streamfuncs_scsi = callbacks->casio_streamfuncs_scsi;
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} else
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c->casio_streamfuncs_scsi = NULL;
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if ((mode & CASIO_OPENMODE_USB)
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&& callbacks->casio_streamfuncs_usb_send_bulk
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&& callbacks->casio_streamfuncs_usb_recv_bulk) {
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stream->casio_stream_mode |= CASIO_OPENMODE_USB;
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c->casio_streamfuncs_usb_send_bulk =
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callbacks->casio_streamfuncs_usb_send_bulk;
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c->casio_streamfuncs_usb_recv_bulk =
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callbacks->casio_streamfuncs_usb_recv_bulk;
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} else {
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c->casio_streamfuncs_usb_send_bulk = NULL;
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c->casio_streamfuncs_usb_recv_bulk = NULL;
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}
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/* Initialize the stream properties. */
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stream->casio_stream_cookie = cookie;
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stream->casio_stream_offset = ioff;
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stream->casio_stream_lasterr = 0;
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casio_init_attrs(stream);
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err = 0;
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fail:
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if (err) {
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casio_free(stream);
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(*callbacks->casio_streamfuncs_close)(cookie);
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}
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return (err);
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}
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/**
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* casio_close:
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* Close a libcasio stream.
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*
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* @arg stream the stream to close.
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* @return the error code (0 if ok).
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*/
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int CASIO_EXPORT casio_close(casio_stream_t *stream)
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{
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casio_stream_close_t *cl;
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if (!stream)
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return (0);
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if ((cl = stream->casio_stream_callbacks.casio_streamfuncs_close))
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(*cl)(stream->casio_stream_cookie);
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casio_free(stream);
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return (0);
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}
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