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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
bitstream.h
Helper classes for reading/writing at the bit level.
***************************************************************************/
#pragma once
#ifndef __BITSTREAM_H__
#define __BITSTREAM_H__
#include <stdint.h>
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// helper class for reading from a bit buffer
struct bitstream
{
uint32_t buffer; // current bit accumulator
int bits; // number of bits in the accumulator
const uint8_t * read; // read pointer
uint32_t doffset; // byte offset within the data
uint32_t dlength; // length of the data
};
struct bitstream* create_bitstream(const void *src, uint32_t srclength);
int bitstream_overflow(struct bitstream* bitstream);
uint32_t bitstream_read_offset(struct bitstream* bitstream);
uint32_t bitstream_read(struct bitstream* bitstream, int numbits);
uint32_t bitstream_peek(struct bitstream* bitstream, int numbits);
void bitstream_remove(struct bitstream* bitstream, int numbits);
uint32_t bitstream_flush(struct bitstream* bitstream);
#endif
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