misc/libphysfs/lzma/CPP/7zip/Compress/LZMA_Alone/LzmaRam.h
author nemo
Mon, 10 Apr 2017 12:06:43 -0400
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permissions -rw-r--r--
bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
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// LzmaRam.h
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#ifndef __LzmaRam_h
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#define __LzmaRam_h
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#include <stdlib.h>
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#include "../../../Common/Types.h"
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/*
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LzmaRamEncode: BCJ + LZMA RAM->RAM compressing.
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It uses .lzma format, but it writes one additional byte to .lzma file:
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  0: - no filter
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  1: - x86(BCJ) filter.
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To provide best compression ratio dictionarySize mustbe >= inSize
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LzmaRamEncode allocates Data with MyAlloc/BigAlloc functions.
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RAM Requirements:
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  RamSize = dictionarySize * 9.5 + 6MB + FilterBlockSize 
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    FilterBlockSize = 0, if useFilter == false
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    FilterBlockSize = inSize, if useFilter == true
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  Return code:
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    0 - OK
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    1 - Unspecified Error
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    2 - Memory allocating error
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    3 - Output buffer OVERFLOW
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If you use SZ_FILTER_AUTO mode, then encoder will use 2 or 3 passes:
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  2 passes when FILTER_NO provides better compression.
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  3 passes when FILTER_YES provides better compression.
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*/
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enum ESzFilterMode 
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{
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  SZ_FILTER_NO,
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  SZ_FILTER_YES,
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  SZ_FILTER_AUTO
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};
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int LzmaRamEncode(
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    const Byte *inBuffer, size_t inSize, 
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    Byte *outBuffer, size_t outSize, size_t *outSizeProcessed, 
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    UInt32 dictionarySize, ESzFilterMode filterMode);
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#endif