66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
/* ****************************************************************************
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* stream/usb_stream.c -- open a “serial” USB stream using bulk reads and
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* writes (as used in Protocol 7).
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* Copyright (C) 2019 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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TIO_HOOK(void) serial_usb_close(void *cookie)
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{
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/* Nothing. */
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}
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TIO_HOOK(int) serial_usb_read(void *cookie, unsigned char *buffer, size_t size)
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{
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/* Nothing. */
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}
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TIO_HOOK(int) serial_usb_write(void *cookie,
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unsigned char const *buffer, size_t size)
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{
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/* Nothing. */
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}
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CASIO_LOCAL tio_functions_t const serial_usb_funcs = {
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(tio_close_t *)&serial_usb_close,
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(tio_read_t *)&serial_usb_read,
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(tio_write_t *)&serial_usb_write,
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NULL
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};
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int CASIO_EXPORT casio_open_serial_usb_stream(tio_stream_t **streamp,
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tio_stream_t *original)
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{
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int terr;
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if (tio_get_type(original) != TIO_TYPE_USB) {
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msg((ll_error, "original stream wasn't a usb stream"));
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return (casio_error_arg);
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}
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terr = tio_open(streamp, original, NULL,
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TIO_OPENFLAG_READ | TIO_OPENFLAG_WRITE, &serial_usb_funcs, 0);
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if (terr) {
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msg((ll_error, "tio_open failed with error %s: %s",
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tio_error_name(terr), tio_error_desc(terr)));
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return (casio_error_unknown);
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}
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return (0);
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}
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