/* -*- compile-command: "cd ../linux && make MEMDEBUG=TRUE -j3"; -*- */
/* 
 * Copyright 2020 by Eric House (xwords@eehouse.org).  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#include "device.h"
#include "comtypes.h"
#include "memstream.h"
#include "xwstream.h"

#ifdef XWFEATURE_DEVICE

# define KEY_DEVSTATE PERSIST_KEY("devState")

typedef struct _DevCtxt {
    XP_U16 devCount;
} DevCtxt;

static XWStreamCtxt*
mkStream( XW_DUtilCtxt* dutil )
{
    XWStreamCtxt* stream = mem_stream_make_raw( MPPARM(dutil->mpool)
                                                dutil_getVTManager(dutil) );
    return stream;
}

static DevCtxt*
load( XW_DUtilCtxt* dutil )
{
    LOG_FUNC();
    DevCtxt* state = (DevCtxt*)dutil->devCtxt;
    if ( NULL == state ) {
        XWStreamCtxt* stream = mkStream( dutil );
        dutil_loadStream( dutil, KEY_DEVSTATE, stream );

        state = XP_CALLOC( dutil->mpool, sizeof(*state) );
        dutil->devCtxt = state;

        if ( 0 < stream_getSize( stream ) ) {
            state->devCount = stream_getU16( stream );
            ++state->devCount;  /* for testing until something's there */
            /* XP_LOGF( "%s(): read devCount: %d", __func__, state->devCount ); */
        } else {
            XP_LOGF( "%s(): empty stream!!", __func__ );
        }
        stream_destroy( stream );
    }

    return state;
}

void
device_store( XW_DUtilCtxt* dutil )
{
    LOG_FUNC();
    DevCtxt* state = load( dutil );
    XWStreamCtxt* stream = mkStream( dutil );
    stream_putU16( stream, state->devCount );
    dutil_storeStream( dutil, KEY_DEVSTATE, stream );
    stream_destroy( stream );

    XP_FREEP( dutil->mpool, &dutil->devCtxt );
}

#endif