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/* host.c */
/* avr.host - Host fonctions modules. {{{
 *
 * Copyright (C) 2005 Nicolas Schodet
 *
 * Robot APB Team/Efrei 2006.
 *        Web: http://assos.efrei.fr/robot/
 *      Email: robot AT efrei DOT fr
 *
 * 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.
 *
 * }}} */
#define _GNU_SOURCE
#include "host.h"

#include <errno.h>
#include <assert.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

/** Initialise host modules. */
void
host_init (int argc, char **argv)
{
}

/** Register a host integer. */
void
host_register_integer (const char *name, int val)
{
    char sval[256];
    /* Convert to string, and register the string. */
    assert (snprintf (sval, sizeof (sval), "%d", val) < (int) sizeof (sval));
    host_register_string (name, sval);
}

/** Register a host string. */
void
host_register_string (const char *name, const char *val)
{
    assert (setenv (name, val, 1) == 0);
}

/** Fetch a host integer, return -1 if non existant. */
int
host_fetch_integer (const char *name)
{
    const char *sval = host_fetch_string (name);
    return sval ? atoi (sval) : -1;
}

/** Fetch a host string, return 0 if non existant. */
const char *
host_fetch_string (const char *name)
{
    return getenv (name);
}

/** Reset the program. */
void
host_reset (void)
{
    execlp (program_invocation_name, program_invocation_name, 0);
    assert_perror (errno);
    abort ();
}