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/*
* Copyright (C) 2012 Tobias Brunner
* Hochschule fuer Technik Rapperswil
*
* Copyright (C) 2010 Martin Willi
* Copyright (C) 2010 revosec AG
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
/**
* @defgroup bio_reader bio_reader
* @{ @ingroup bio
*/
#ifndef BIO_READER_H_
#define BIO_READER_H_
typedef struct bio_reader_t bio_reader_t;
#include <library.h>
/**
* Buffered input parser.
*
* @note Integers are returned in host byte order.
*/
struct bio_reader_t {
/**
* Get the number of remaining bytes.
*
* @return number of remaining bytes in buffer
*/
u_int32_t (*remaining)(bio_reader_t *this);
/**
* Peek the remaining data, not consuming any bytes.
*
* @return remaining data
*/
chunk_t (*peek)(bio_reader_t *this);
/**
* Read a 8-bit integer from the buffer, advance.
*
* @param res pointer to result
* @return TRUE if integer read successfully
*/
bool (*read_uint8)(bio_reader_t *this, u_int8_t *res);
/**
* Read a 16-bit integer from the buffer, advance.
*
* @param res pointer to result
* @return TRUE if integer read successfully
*/
bool (*read_uint16)(bio_reader_t *this, u_int16_t *res);
/**
* Read a 24-bit integer from the buffer, advance.
*
* @param res pointer to result
* @return TRUE if integer read successfully
*/
bool (*read_uint24)(bio_reader_t *this, u_int32_t *res);
/**
* Read a 32-bit integer from the buffer, advance.
*
* @param res pointer to result
* @return TRUE if integer read successfully
*/
bool (*read_uint32)(bio_reader_t *this, u_int32_t *res);
/**
* Read a 64-bit integer from the buffer, advance.
*
* @param res pointer to result
* @return TRUE if integer read successfully
*/
bool (*read_uint64)(bio_reader_t *this, u_int64_t *res);
/**
* Read a chunk of len bytes, advance.
*
* @param len number of bytes to read
* @param res pointer to result, not cloned
* @return TRUE if data read successfully
*/
bool (*read_data)(bio_reader_t *this, u_int32_t len, chunk_t *res);
/**
* Read a 8-bit integer from the end of the buffer, reduce remaining.
*
* @param res pointer to result
* @return TRUE if integer read successfully
*/
bool (*read_uint8_end)(bio_reader_t *this, u_int8_t *res);
/**
* Read a 16-bit integer from the end of the buffer, reduce remaining.
*
* @param res pointer to result
* @return TRUE if integer read successfully
*/
bool (*read_uint16_end)(bio_reader_t *this, u_int16_t *res);
/**
* Read a 24-bit integer from the end of the buffer, reduce remaining.
*
* @param res pointer to result
* @return TRUE if integer read successfully
*/
bool (*read_uint24_end)(bio_reader_t *this, u_int32_t *res);
/**
* Read a 32-bit integer from the end of the buffer, reduce remaining.
*
* @param res pointer to result
* @return TRUE if integer read successfully
*/
bool (*read_uint32_end)(bio_reader_t *this, u_int32_t *res);
/**
* Read a 64-bit integer from the end of the buffer, reduce remaining.
*
* @param res pointer to result
* @return TRUE if integer read successfully
*/
bool (*read_uint64_end)(bio_reader_t *this, u_int64_t *res);
/**
* Read a chunk of len bytes from the end of the buffer, reduce remaining.
*
* @param len number of bytes to read
* @param res ponter to result, not cloned
* @return TRUE if data read successfully
*/
bool (*read_data_end)(bio_reader_t *this, u_int32_t len, chunk_t *res);
/**
* Read a chunk of bytes with a 8-bit length header, advance.
*
* @param res pointer to result, not cloned
* @return TRUE if data read successfully
*/
bool (*read_data8)(bio_reader_t *this, chunk_t *res);
/**
* Read a chunk of bytes with a 16-bit length header, advance.
*
* @param res pointer to result, not cloned
* @return TRUE if data read successfully
*/
bool (*read_data16)(bio_reader_t *this, chunk_t *res);
/**
* Read a chunk of bytes with a 24-bit length header, advance.
*
* @param res pointer to result, not cloned
* @return TRUE if data read successfully
*/
bool (*read_data24)(bio_reader_t *this, chunk_t *res);
/**
* Read a chunk of bytes with a 32-bit length header, advance.
*
* @param res pointer to result, not cloned
* @return TRUE if data read successfully
*/
bool (*read_data32)(bio_reader_t *this, chunk_t *res);
/**
* Destroy a bio_reader_t.
*/
void (*destroy)(bio_reader_t *this);
};
/**
* Create a bio_reader instance.
*/
bio_reader_t *bio_reader_create(chunk_t data);
#endif /** bio_reader_H_ @}*/
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