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

usr / src / contrib / xz / src / liblzma / check /

📁 ..
📄 check.c(2.84 KB)
📄 check.h(4.61 KB)
📄 crc32_fast.c(2.22 KB)
📄 crc32_small.c(1.02 KB)
📄 crc32_table.c(641 B)
📄 crc32_table_be.h(25.15 KB)
📄 crc32_table_le.h(25.15 KB)
📄 crc32_tablegen.c(2.19 KB)
📄 crc32_x86.S(7.08 KB)
📄 crc64_fast.c(1.6 KB)
📄 crc64_small.c(966 B)
📄 crc64_table.c(641 B)
📄 crc64_table_be.h(31.13 KB)
📄 crc64_table_le.h(31.13 KB)
📄 crc64_tablegen.c(1.7 KB)
📄 crc64_x86.S(6.63 KB)
📄 crc_macros.h(787 B)

Editing: crc64_fast.c

///////////////////////////////////////////////////////////////////////////////
//
/// \file       crc64.c
/// \brief      CRC64 calculation
///
/// Calculate the CRC64 using the slice-by-four algorithm. This is the same
/// idea that is used in crc32_fast.c, but for CRC64 we use only four tables
/// instead of eight to avoid increasing CPU cache usage.
//
//  Author:     Lasse Collin
//
//  This file has been put into the public domain.
//  You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////

#include "check.h"
#include "crc_macros.h"

#ifdef WORDS_BIGENDIAN
#	define A1(x) ((x) >> 56)
#else
#	define A1 A
#endif

// See the comments in crc32_fast.c. They aren't duplicated here.
extern LZMA_API(uint64_t)
lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc)
{
	crc = ~crc;

#ifdef WORDS_BIGENDIAN
	crc = bswap64(crc);
#endif

if (size > 4) {
		while ((uintptr_t)(buf) & 3) {
			crc = lzma_crc64_table[0][*buf++ ^ A1(crc)] ^ S8(crc);
			--size;
		}

const uint8_t *const limit = buf + (size & ~(size_t)(3));
		size &= (size_t)(3);

while (buf < limit) {
#ifdef WORDS_BIGENDIAN
			const uint32_t tmp = (crc >> 32)
					^ aligned_read32ne(buf);
#else
			const uint32_t tmp = crc ^ aligned_read32ne(buf);
#endif
			buf += 4;

crc = lzma_crc64_table[3][A(tmp)]
			    ^ lzma_crc64_table[2][B(tmp)]
			    ^ S32(crc)
			    ^ lzma_crc64_table[1][C(tmp)]
			    ^ lzma_crc64_table[0][D(tmp)];
		}
	}

while (size-- != 0)
		crc = lzma_crc64_table[0][*buf++ ^ A1(crc)] ^ S8(crc);

#ifdef WORDS_BIGENDIAN
	crc = bswap64(crc);
#endif

return ~crc;
}

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Editing: crc64_fast.c

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