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/***************************************************************************
*
* Project: OpenCPN
*
***************************************************************************
* Copyright (C) 2010 by David S. Register *
* *
* 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************
*/
#ifndef __AIS_BITSTRING_H__
#define __AIS_BITSTRING_H__
#define AIS_MAX_MESSAGE_LEN (10 * 82) // AIS Spec allows up to 9 sentences per message, 82 bytes each
class AIS_Bitstring
{
public:
AIS_Bitstring(const char *str);
unsigned char to_6bit(const char c);
/// sp is starting bit, 1-based
int GetInt(int sp, int len, bool signed_flag = false);
int GetStr(int sp, int bit_len, char *dest, int max_len);
int GetBitCount();
private:
unsigned char bitbytes[AIS_MAX_MESSAGE_LEN];
int byte_length;
};
#endif
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