117 lines
3.6 KiB
C
117 lines
3.6 KiB
C
/* ****************************************************************************
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* link/open.c -- link utilities.
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* Copyright (C) 2016-2017 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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* The `casio_open_link` is the function that really initializes
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* the communication using the given stream (once the stream is initialized).
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* It went public recently to give the possibility to the user to make a
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* custom stream, probably for its platform.
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* ************************************************************************* */
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#include "link.h"
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#include <stdlib.h>
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#include <string.h>
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/**
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* casio_open_link:
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* Open a link handle.
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*
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* @arg h the handle to create
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* @arg flags the flags.
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* @arg stream the stream to use.
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* @arg settings the stream settings to use.
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* @return the error (0 if ok)
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*/
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int CASIO_EXPORT casio_open_link(casio_link_t **h, unsigned long flags,
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casio_stream_t *stream, const casio_streamattrs_t *settings)
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{
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int err = 0;
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casio_link_t *handle;
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/* allocate handle */
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msg((ll_info, "Allocating and building the link handle!"));
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*h = NULL;
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if (!(*h = casio_alloc(1, sizeof(casio_link_t)))) {
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err = casio_error_alloc;
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goto fail;
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}
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/* initialize handle */
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handle = *h; memset(handle, 0, sizeof(casio_link_t)); /* important! */
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handle->casio_link_stream = stream;
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/* initialize flags */
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handle->casio_link_flags = 0;
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if (flags & CASIO_LINKFLAG_ACTIVE)
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handle->casio_link_flags |= casio_linkflag_active;
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if (flags & CASIO_LINKFLAG_TERM)
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handle->casio_link_flags |= casio_linkflag_term;
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if (flags & CASIO_LINKFLAG_CHECK)
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handle->casio_link_flags |= casio_linkflag_check;
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if (~flags & CASIO_LINKFLAG_NODISC)
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handle->casio_link_flags |= casio_linkflag_disc;
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msg((ll_info, "[Options] Active: %s",
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flags & CASIO_LINKFLAG_ACTIVE ? "yes" : "no"));
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msg((ll_info, "[Options] Check: %s",
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flags & CASIO_LINKFLAG_CHECK ? "yes" : "no"));
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ifmsg(flags & CASIO_LINKFLAG_CHECK, (ll_info,
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"[Options] Make discovery: %s",
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flags & CASIO_LINKFLAG_NODISC ? "no" : "yes"));
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msg((ll_info, "[Options] Terminate: %s",
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flags & CASIO_LINKFLAG_TERM ? "yes" : "no"));
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/* set communication thingies */
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msg((ll_info, "Initializing stream settings."));
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if (!settings) casio_init_attrs(handle->casio_link_stream);
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else casio_set_attrs(handle->casio_link_stream, settings);
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/* if active, start */
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err = casio_seven_start(handle);
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if (err) goto fail;
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/* initialization went alright */
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return (0);
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fail:
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if (*h) casio_close_link(*h);
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*h = NULL;
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return (err);
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}
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/**
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* casio_close_link:
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* De-initialize a link handle..
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*
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* @arg handle the handle to free.
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*/
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void CASIO_EXPORT casio_close_link(casio_link_t *handle)
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{
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/* check if handle is already freed */
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if (!handle) return ;
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msg((ll_info, "Let's end that mess."));
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/* end communication -- FIXME: check error? */
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casio_seven_end(handle);
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/* close stream */
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casio_close(handle->casio_link_stream);
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/* free handle */
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msg((ll_info, "freeing the handle!"));
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casio_free(handle);
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}
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