OpenV2G/src/codec/EXIHeader.c

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/*
* Copyright (C) 2007-2010 Siemens AG
*
* This program 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 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*******************************************************************
*
* @author Daniel.Peintner.EXT@siemens.com
* @version 0.1
* @contact Joerg.Heuer@siemens.com
*
********************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include "EXIHeader.h"
#include "BitInputStream.h"
#include "BitOutputStream.h"
#include "BitDecoderChannel.h"
#include "BitEncoderChannel.h"
#ifndef EXI_HEADER_C
#define EXI_HEADER_C
int readEXIHeader(bitstream_t* stream) {
uint8_t header;
int errn = readBits(stream, 8, &header);
if (errn < 0) {
return errn;
}
if(header == '$') {
/* we do not support "EXI Cookie" */
errn = -1;
} else if ( header & 0x20 ) {
/* we do not support "Presence Bit for EXI Options" */
errn = -2;
} else {
/* Yes, a *simple* header */
errn = 0;
}
return errn;
}
int writeEXIHeader(bitstream_t* stream) {
return writeBits(stream, 144, 8);
}
#endif