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Current Path: /usr/src/contrib/xz/src/liblzma/lzma

usr / src / contrib / xz / src / liblzma / lzma /

📁 ..
📄 fastpos.h(3.9 KB)
📄 fastpos_table.c(33.16 KB)
📄 fastpos_tablegen.c(1.24 KB)
📄 lzma2_decoder.c(7.4 KB)
📄 lzma2_decoder.h(819 B)
📄 lzma2_encoder.c(10.25 KB)
📄 lzma2_encoder.h(1.16 KB)
📄 lzma_common.h(6.78 KB)
📄 lzma_decoder.c(26.68 KB)
📄 lzma_decoder.h(1.52 KB)
📄 lzma_encoder.c(18.08 KB)
📄 lzma_encoder.h(1.57 KB)
📄 lzma_encoder_optimum_fast.c(4.3 KB)
📄 lzma_encoder_optimum_normal.c(22.74 KB)
📄 lzma_encoder_presets.c(1.72 KB)
📄 lzma_encoder_private.h(3.82 KB)

Editing: lzma_encoder_presets.c

///////////////////////////////////////////////////////////////////////////////
//
/// \file       lzma_encoder_presets.c
/// \brief      Encoder presets
/// \note       xz needs this even when only decoding is enabled.
//
//  Author:     Lasse Collin
//
//  This file has been put into the public domain.
//  You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////

#include "common.h"

extern LZMA_API(lzma_bool)
lzma_lzma_preset(lzma_options_lzma *options, uint32_t preset)
{
	const uint32_t level = preset & LZMA_PRESET_LEVEL_MASK;
	const uint32_t flags = preset & ~LZMA_PRESET_LEVEL_MASK;
	const uint32_t supported_flags = LZMA_PRESET_EXTREME;

if (level > 9 || (flags & ~supported_flags))
		return true;

options->preset_dict = NULL;
	options->preset_dict_size = 0;

options->lc = LZMA_LC_DEFAULT;
	options->lp = LZMA_LP_DEFAULT;
	options->pb = LZMA_PB_DEFAULT;

static const uint8_t dict_pow2[]
			= { 18, 20, 21, 22, 22, 23, 23, 24, 25, 26 };
	options->dict_size = UINT32_C(1) << dict_pow2[level];

if (level <= 3) {
		options->mode = LZMA_MODE_FAST;
		options->mf = level == 0 ? LZMA_MF_HC3 : LZMA_MF_HC4;
		options->nice_len = level <= 1 ? 128 : 273;
		static const uint8_t depths[] = { 4, 8, 24, 48 };
		options->depth = depths[level];
	} else {
		options->mode = LZMA_MODE_NORMAL;
		options->mf = LZMA_MF_BT4;
		options->nice_len = level == 4 ? 16 : level == 5 ? 32 : 64;
		options->depth = 0;
	}

if (flags & LZMA_PRESET_EXTREME) {
		options->mode = LZMA_MODE_NORMAL;
		options->mf = LZMA_MF_BT4;
		if (level == 3 || level == 5) {
			options->nice_len = 192;
			options->depth = 0;
		} else {
			options->nice_len = 273;
			options->depth = 512;
		}
	}

return false;
}

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Editing: lzma_encoder_presets.c

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