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/************
*
* This file is part of a tool for reading 3D content in the PRC format.
* Copyright (C) 2008 Orest Shardt <shardtor (at) gmail dot com>
*
* 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/>.
*
*************/
#ifndef __BITDATA_H
#define __BITDATA_H
#include <iostream>
#include <string>
struct BitPosition
{
unsigned int byteIndex;
unsigned int bitIndex;
};
class BitByBitData
{
public:
BitByBitData(char* s,unsigned int l) : start(s),data(s),length(l),
bitMask(0x80),showBits(false),failed(false) {}
void tellPosition();
BitPosition getPosition();
void setPosition(const BitPosition&);
void setPosition(unsigned int,unsigned int);
void setShowBits(bool);
bool readBit();
unsigned char readChar();
unsigned int readUnsignedInt();
std::string readString();
int readInt();
double readDouble();
private:
char *start; // first byte so we know where we are
char *data; // last byte read
unsigned int length;
unsigned char bitMask; // mask to read next bit of current byte
bool showBits; // show each bit read?
bool failed;
void nextBit(); // shift bit mask and get next byte if needed
};
#endif // __BITDATA_H
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