databits_ascii.c

/*
* databits_ascii.c
*
* Copyright (C) 2012 Kamal Mostafa <kamal@whence.com>
*
*  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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include "databits.h"
#include <jo/jo.h>

#define UNUSED(x) (void)(x)

/*
* ASCII 8-bit data databits decoder/encoder (passthrough)
*/

/* returns the number of datawords stuffed into *databits_outp */
int
databits_encode_ascii8( unsigned int *databits_outp, char char_out )
{
    UNUSED(char_out);

    *databits_outp = char_out;
    return 1;
}

/* returns nbytes decoded */
unsigned int
databits_decode_ascii8( char *dataout_p, unsigned int dataout_size,
    unsigned long long bits, unsigned int n_databits )
{
    UNUSED(dataout_size);
    UNUSED(n_databits);

    if ( ! dataout_p ) // databits processor reset: noop
        return 0;

    bits &= 0xFF;
    *dataout_p = bits;
    return 1;
}