131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
/*
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* $Id$
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*
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* Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
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* Copyright (c) 2002-2014, 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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#include <stddef.h>
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#include "openjpeg.h"
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#include "opj_stdint.h"
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typedef uint8_t Byte_t;
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typedef uint16_t Byte2_t;
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typedef uint32_t Byte4_t;
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typedef uint64_t 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, OPJ_OFF_T offset, OPJ_SIZE_T 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, OPJ_OFF_T 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, OPJ_OFF_T 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, OPJ_OFF_T 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, OPJ_OFF_T 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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/**
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* modify 4Byte code in a codestream
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*
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* @param[in] code code value
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* @param[out] stream modifying codestream
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*/
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void modify_4Bytecode(Byte4_t code, Byte_t *stream);
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/**
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* Get file size
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*
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* @param[in] fd file discriptor
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* @return file size
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*/
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OPJ_OFF_T get_filesize(int fd);
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#endif /* !BYTE_MANAGER_H_ */
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