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/*
* $Id$
*
* Copyright (c) 2002-2011, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
* Copyright (c) 2002-2011, Professor Benoit Macq
* Copyright (c) 2010-2011, Kaori Hagihara
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef BYTE_MANAGER_H_
#define BYTE_MANAGER_H_
#include <stddef.h>
#include "opj_stdint.h"
typedef uint8_t Byte_t;
typedef uint16_t Byte2_t;
typedef uint32_t Byte4_t;
typedef uint64_t Byte8_t;
/**
* fetch bytes of data in file stream
*
* @param[in] fd file discriptor
* @param[in] offset start Byte position
* @param[in] size Byte length
* @return pointer to the fetched data
*/
Byte_t * fetch_bytes( int fd, OPJ_OFF_T offset, OPJ_SIZE_T size);
/**
* fetch a 1-byte Byte codes in file stream
*
* @param[in] fd file discriptor
* @param[in] offset start Byte position
* @return fetched codes
*/
Byte_t fetch_1byte( int fd, OPJ_OFF_T offset);
/**
* fetch a 2-byte big endian Byte codes in file stream
*
* @param[in] fd file discriptor
* @param[in] offset start Byte position
* @return fetched codes
*/
Byte2_t fetch_2bytebigendian( int fd, OPJ_OFF_T offset);
/**
* fetch a 4-byte big endian Byte codes in file stream
*
* @param[in] fd file discriptor
* @param[in] offset start Byte position
* @return fetched codes
*/
Byte4_t fetch_4bytebigendian( int fd, OPJ_OFF_T offset);
/**
* fetch a 8-byte big endian Byte codes in file stream
*
* @param[in] fd file discriptor
* @param[in] offset start Byte position
* @return fetched codes
*/
Byte8_t fetch_8bytebigendian( int fd, OPJ_OFF_T offset);
/**
* convert 2-byte big endian Byte codes to number
*
* @param[in] buf Byte codes
* @return resolved number
*/
Byte2_t big2( Byte_t *buf);
/**
* convert 4-byte big endian Byte codes to number
*
* @param[in] buf Byte codes
* @return resolved number
*/
Byte4_t big4( Byte_t *buf);
/**
* convert 8-byte big endian Byte codes to number
*
* @param[in] buf Byte codes
* @return resolved number
*/
Byte8_t big8( Byte_t *buf);
/**
* modify 4Byte code in a codestream
*
* @param[in] code code value
* @param[out] stream modifying codestream
*/
void modify_4Bytecode( Byte4_t code, Byte_t *stream);
/**
* Get file size
*
* @param[in] fd file discriptor
* @return file size
*/
OPJ_OFF_T get_filesize( int fd);
#endif /* !BYTE_MANAGER_H_ */
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