73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
/*
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* Copyright (c) 2003 The Regents of The University of Michigan
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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 are
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* met: 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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* 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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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __NULL_COMPRESSION_HH__
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#define __NULL_COMPRESSION_HH__
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/**
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* @file
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* This file defines a doNothing compression algorithm.
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*/
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/**
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* A dummy compression class to use when no data compression is desired.
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*/
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class NullCompression
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{
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public:
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/**
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* Uncompress the data, causes a fatal since no data should be compressed.
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* @param dest The output buffer.
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* @param src The compressed data.
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* @param size The number of bytes in src.
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*
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* @retval The size of the uncompressed data.
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*/
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static int uncompress(uint8_t * dest, uint8_t *src, int size)
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{
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fatal("Can't uncompress data");
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}
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/**
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* Compress the data, just returns the source data.
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* @param dest The output buffer.
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* @param src The data to be compressed.
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* @param size The number of bytes in src.
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*
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* @retval The size of the compressed data.
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*/
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static int compress(uint8_t *dest, uint8_t *src, int size)
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{
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memcpy(dest,src,size);
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return size;
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}
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};
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#endif //__NULL_COMPRESSION_HH__
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