121 lines
3.5 KiB
C
121 lines
3.5 KiB
C
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/*
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* $Id: byte_manager.h 44 2011-02-15 12:32:29Z kaori $
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*
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* Copyright (c) 2002-2011, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
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* Copyright (c) 2002-2011, Professor Benoit Macq
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* Copyright (c) 2010-2011, Kaori Hagihara
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef BYTE_MANAGER_H_
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# define BYTE_MANAGER_H_
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//! 1Byte parameter type
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typedef unsigned char Byte_t;
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//! 2Byte parameter type
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typedef unsigned short int Byte2_t;
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//! 4Byte parameter type
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typedef unsigned int Byte4_t;
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//! 8Byte parameter type
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typedef unsigned long long int Byte8_t;
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/**
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* fetch bytes of data in file stream
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*
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* @param[in] fd file discriptor
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* @param[in] offset start Byte position
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* @param[in] size Byte length
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* @return pointer to the fetched data
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*/
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Byte_t * fetch_bytes( int fd, long offset, int size);
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/**
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* fetch a 1-byte Byte codes in file stream
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*
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* @param[in] fd file discriptor
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* @param[in] offset start Byte position
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* @return fetched codes
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*/
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Byte_t fetch_1byte( int fd, long offset);
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/**
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* fetch a 2-byte big endian Byte codes in file stream
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*
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* @param[in] fd file discriptor
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* @param[in] offset start Byte position
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* @return fetched codes
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*/
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Byte2_t fetch_2bytebigendian( int fd, long offset);
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/**
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* fetch a 4-byte big endian Byte codes in file stream
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*
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* @param[in] fd file discriptor
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* @param[in] offset start Byte position
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* @return fetched codes
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*/
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Byte4_t fetch_4bytebigendian( int fd, long offset);
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/**
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* fetch a 8-byte big endian Byte codes in file stream
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*
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* @param[in] fd file discriptor
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* @param[in] offset start Byte position
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* @return fetched codes
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*/
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Byte8_t fetch_8bytebigendian( int fd, long offset);
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/**
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* convert 2-byte big endian Byte codes to number
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*
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* @param[in] buf Byte codes
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* @return resolved number
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*/
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Byte2_t big2( Byte_t *buf);
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/**
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* convert 4-byte big endian Byte codes to number
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*
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* @param[in] buf Byte codes
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* @return resolved number
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*/
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Byte4_t big4( Byte_t *buf);
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/**
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* convert 8-byte big endian Byte codes to number
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*
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* @param[in] buf Byte codes
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* @return resolved number
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*/
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Byte8_t big8( Byte_t *buf);
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#endif /* !BYTE_MANAGER_H_ */
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