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Current Path: /usr/src/sys/contrib/xz-embedded/linux/lib/xz

usr / src / sys / contrib / xz-embedded / linux / lib / xz /

📁 ..
📄 Kconfig(1.23 KB)
📄 Makefile(178 B)
📄 xz_crc32.c(1.23 KB)
📄 xz_crc64.c(923 B)
📄 xz_dec_bcj.c(13.58 KB)
📄 xz_dec_lzma2.c(28.39 KB)
📄 xz_dec_stream.c(20.03 KB)
📄 xz_dec_syms.c(664 B)
📄 xz_dec_test.c(5.15 KB)
📄 xz_lzma2.h(5.97 KB)
📄 xz_private.h(4.47 KB)
📄 xz_stream.h(1.43 KB)

Editing: xz_crc32.c

/*
 * CRC32 using the polynomial from IEEE-802.3
 *
 * Authors: Lasse Collin <lasse.collin@tukaani.org>
 *          Igor Pavlov <http://7-zip.org/>
 *
 * This file has been put into the public domain.
 * You can do whatever you want with this file.
 */

/*
 * This is not the fastest implementation, but it is pretty compact.
 * The fastest versions of xz_crc32() on modern CPUs without hardware
 * accelerated CRC instruction are 3-5 times as fast as this version,
 * but they are bigger and use more memory for the lookup table.
 */

#include "xz_private.h"

/*
 * STATIC_RW_DATA is used in the pre-boot environment on some architectures.
 * See <linux/decompress/mm.h> for details.
 */
#ifndef STATIC_RW_DATA
#	define STATIC_RW_DATA static
#endif

STATIC_RW_DATA uint32_t xz_crc32_table[256];

XZ_EXTERN void xz_crc32_init(void)
{
	const uint32_t poly = 0xEDB88320;

uint32_t i;
	uint32_t j;
	uint32_t r;

for (i = 0; i < 256; ++i) {
		r = i;
		for (j = 0; j < 8; ++j)
			r = (r >> 1) ^ (poly & ~((r & 1) - 1));

xz_crc32_table[i] = r;
	}

return;
}

XZ_EXTERN uint32_t xz_crc32(const uint8_t *buf, size_t size, uint32_t crc)
{
	crc = ~crc;

while (size != 0) {
		crc = xz_crc32_table[*buf++ ^ (crc & 0xFF)] ^ (crc >> 8);
		--size;
	}

return ~crc;
}

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Editing: xz_crc32.c

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