74 lines
3.2 KiB
C++
74 lines
3.2 KiB
C++
//bytes_rle.h
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//快速解压的一个通用字节流压缩rle算法.
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//
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/*
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The MIT License (MIT)
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Copyright (c) 2012-2021 HouSisong
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use,
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copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following
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conditions:
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The above copyright notice and this permission notice shall be
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included in all copies of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __BYTES_RLE_H_
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#define __BYTES_RLE_H_
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#include <string.h>
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#include <vector>
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#include "../../HPatch/patch_types.h" //hpatch_TStreamInput
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namespace hdiff_private{
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#ifndef kMaxBytesRleLen
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static const size_t kMaxBytesRleLen =(size_t)(((size_t)1<<31)-1);
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#endif
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enum TRleParameter{ kRle_bestSize=1, kRle_default=3, kRle_bestUnRleSpeed=32 };
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void bytesRLE_save(std::vector<unsigned char>& out_code,
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const unsigned char* src,const unsigned char* src_end,
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int rle_parameter=kRle_default);
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void bytesRLE_save(std::vector<unsigned char>& out_code,
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const hpatch_TStreamInput* src,//sequential read
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int rle_parameter=kRle_default);
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void bytesRLE_save(std::vector<unsigned char>& out_ctrlBuf,std::vector<unsigned char>& out_codeBuf,
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const unsigned char* src,const unsigned char* src_end,int rle_parameter);
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void bytesRLE_save(std::vector<unsigned char>& out_ctrlBuf,std::vector<unsigned char>& out_codeBuf,
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const hpatch_TStreamInput* src,//sequential read
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int rle_parameter);
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struct TSingleStreamRLE0{
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std::vector<unsigned char> fixed_code;
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std::vector<unsigned char> uncompressData;
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hpatch_StreamPos_t len0;
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inline TSingleStreamRLE0():len0(0){}
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inline hpatch_StreamPos_t curCodeSize() const { return maxCodeSize(0,0); }
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hpatch_StreamPos_t maxCodeSize(const unsigned char* appendData,const unsigned char* appendData_end) const;
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hpatch_StreamPos_t maxCodeSize(const hpatch_TStreamInput* appendData) const;//sequential read
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hpatch_StreamPos_t maxCodeSizeByZeroLen(hpatch_StreamPos_t appendZeroLen) const;
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void append(const unsigned char* appendData,const unsigned char* appendData_end);
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void append(const hpatch_TStreamInput* appendData);//sequential read
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void appendByZeroLen(hpatch_StreamPos_t appendZeroLen);
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void finishAppend();
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inline void clear() { fixed_code.clear(); uncompressData.clear(); len0=0; }
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};
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}//namespace hdiff_private
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#endif //__BYTES_RLE_H_
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