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/* ****************************************************************************
* stream/attrs.c -- streams management.
* Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
*
* This file is part of libcasio.
* libcasio 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 3.0 of the License,
* or (at your option) any later version.
*
* libcasio 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 libcasio; if not, see <http://www.gnu.org/licenses/>.
* ************************************************************************* */
#include "stream.h"
/* ************************************************************************* */
/* Manage attributes */
/* ************************************************************************* */
/**
* casio_make_attrs:
* Make attributes from a string.
*
* @arg attrs the attributes to make.
* @arg raw the string.
* @return the error code (0 if ok).
*/
int CASIO_EXPORT casio_make_attrs(casio_streamattrs_t *attrs, const char *raw)
{
unsigned int speed; char par; int stop;
/* check if we just want to initialize */
if (!raw) {
memset(attrs, 0, sizeof(casio_streamattrs_t)); /* ABI XXX */
attrs->casio_streamattrs_flags =
CASIO_TWOSTOPBITS | CASIO_DTRCTL_ENABLE | CASIO_RTSCTL_ENABLE;
attrs->casio_streamattrs_speed = CASIO_B9600;
return (0);
}
/* extract data from the string */
if (sscanf(raw, "%u%c%d", &speed, &par, &stop) < 3
|| (par != 'N' && par != 'E' && par != 'O')
|| (stop != 1 && stop != 2)) {
msg((ll_error, "Invalid format!"));
return (casio_error_op);
}
/* get the speed */
switch (speed) {
case 1200: speed = CASIO_B1200; break;
case 2400: speed = CASIO_B2400; break;
case 4800: speed = CASIO_B4800; break;
case 9600: speed = CASIO_B9600; break;
case 19200: speed = CASIO_B19200; break;
case 38400: speed = CASIO_B38400; break;
case 57600: speed = CASIO_B57600; break;
case 115200: speed = CASIO_B115200; break;
default:
msg((ll_error, "%u isn't a valid speed!", speed));
return (casio_error_op);
}
/* set the settings */
casio_make_attrs(attrs, NULL);
attrs->casio_streamattrs_speed = speed;
attrs->casio_streamattrs_flags &= ~(CASIO_TWOSTOPBITS | CASIO_PARMASK);
attrs->casio_streamattrs_flags |= --stop
? CASIO_TWOSTOPBITS : CASIO_ONESTOPBIT;
attrs->casio_streamattrs_flags |= par == 'N' ? CASIO_PARDIS
: par == 'E' ? CASIO_PARENB | CASIO_PAREVEN
: CASIO_PARENB | CASIO_PARODD;
return (0);
}
/* ************************************************************************* */
/* Set the attributes of a stream */
/* ************************************************************************* */
/**
* casio_init_attrs:
* Initialize the attributes.
*
* @arg attrs the settings to initialize.
* @return the error.
*/
int CASIO_EXPORT casio_init_attrs(casio_stream_t *stream)
{
int err; casio_stream_setattrs_t *s;
casio_streamattrs_t attrs;
if (!stream) return (casio_error_op);
s = getcb(stream, setattrs);
if (!s) return (casio_error_op);
casio_make_attrs(&attrs, NULL);
err = (*s)(stream->casio_stream_cookie, &attrs);
if (err) return (err);
memcpy(&stream->casio_stream_attrs, &attrs,
sizeof(casio_streamattrs_t));
return (0);
}
/**
* casio_set_attrs:
* Set the attributes of a libcasio stream.
*
* @arg stream the stream to set the attributes of.
* @arg attrs the attributes to set.
* @return the error code (0 if ok).
*/
int CASIO_EXPORT casio_set_attrs(casio_stream_t *stream,
const casio_streamattrs_t *attrs)
{
int err; casio_stream_setattrs_t *s;
/* check if the attributes aren't valid */
if (!attrs) return (casio_error_invalid);
/* check if the callback exists */
if (!stream) return (casio_error_op);
s = getcb(stream, setattrs);
failure(!s, casio_error_op)
/* call it */
err = (*s)(stream->casio_stream_cookie, attrs);
failure(err, err)
memcpy(&stream->casio_stream_attrs, attrs, sizeof(casio_streamattrs_t));
err = 0;
fail:
stream->casio_stream_lasterr = err;
return (err);
}
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