lib/ext2fs/crc32c.c

/*
 * crc32c.c
 *
 * August 26, 2011 Darrick J. Wong <djwong at us.ibm.com>
 * Reuse Bob Pearson's slice-by-8 implementation for e2fsprogs.
 *
 * July 20, 2011 Bob Pearson <rpearson at systemfabricworks.com>
 * added slice by 8 algorithm to the existing conventional and
 * slice by 4 algorithms.
 *
 * Oct 15, 2000 Matt Domsch <Matt_Domsch@dell.com>
 * Nicer crc32 functions/docs submitted by linux@horizon.com.  Thanks!
 * Code was from the public domain, copyright abandoned.  Code was
 * subsequently included in the kernel, thus was re-licensed under the
 * GNU GPL v2.
 *
 * Oct 12, 2000 Matt Domsch <Matt_Domsch@dell.com>
 * Same crc32 function was used in 5 other places in the kernel.
 * I made one version, and deleted the others.
 * There are various incantations of crc32().  Some use a seed of 0 or ~0.
 * Some xor at the end with ~0.  The generic crc32() function takes
 * seed as an argument, and doesn't xor at the end.  Then individual
 * users can do whatever they need.
 *   drivers/net/smc9194.c uses seed ~0, doesn't xor with ~0.
 *   fs/jffs2 uses seed 0, doesn't xor with ~0.
 *   fs/partitions/efi.c uses seed ~0, xor's with ~0.
 *
 * This source code is licensed under the GNU General Public License,
 * Version 2.  See the file COPYING for more details.
 */
#include "config.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#define __force
#define min(x, y)		((x) > (y) ? (y) : (x))
#define __ALIGN_KERNEL_MASK(x, mask)	(((x) + (mask)) & ~(mask))
#define __ALIGN_KERNEL(x, a)	__ALIGN_KERNEL_MASK(x, (__typeof__(x))(a) - 1)
#define ALIGN(x, a)		__ALIGN_KERNEL((x), (a))
#define PTR_ALIGN(p, a)		((__typeof__(p))ALIGN((unsigned long)(p), (a)))
#include "crc32c_defs.h"

#include "ext2fs.h"
#ifdef WORDS_BIGENDIAN
#define __constant_cpu_to_le32(x) ___constant_swab32((x))
#define __constant_cpu_to_be32(x) (x)
#define __be32_to_cpu(x) (x)
#define __cpu_to_be32(x) (x)
#define __cpu_to_le32(x) (ext2fs_cpu_to_le32((x)))
#define __le32_to_cpu(x) (ext2fs_le32_to_cpu((x)))
#else
#define __constant_cpu_to_le32(x) (x)
#define __constant_cpu_to_be32(x) ___constant_swab32((x))
#define __be32_to_cpu(x) (ext2fs_be32_to_cpu((x)))
#define __cpu_to_be32(x) (ext2fs_cpu_to_be32((x)))
#define __cpu_to_le32(x) (x)
#define __le32_to_cpu(x) (x)
#endif

#if CRC_LE_BITS > 8
# define tole(x) (__force uint32_t) __constant_cpu_to_le32(x)
#else
# define tole(x) (x)
#endif

#if CRC_BE_BITS > 8
# define tobe(x) (__force uint32_t) __constant_cpu_to_be32(x)
#else
# define tobe(x) (x)
#endif

#include "crc32c_table.h"

#if CRC_LE_BITS == 32
/* slice by 4 algorithm */
static uint32_t crc32c_le_body(uint32_t crc, uint8_t const *buf, size_t len)
{
	const uint8_t *p8;
	const uint32_t *p32;
	size_t init_bytes;
	size_t words;
	size_t end_bytes;
	size_t i;
	uint32_t q;
	uint8_t i0, i1, i2, i3;

	crc = (__force uint32_t) __cpu_to_le32(crc);

	/* unroll loop into 'init_bytes' odd bytes followed by
	 * 'words' aligned 4 byte words followed by
	 * 'end_bytes' odd bytes at the end */
	p8 = buf;
	p32 = (uint32_t *)PTR_ALIGN(p8, 4);
	init_bytes = min((uintptr_t)p32 - (uintptr_t)p8, len);
	words = (len - init_bytes) >> 2;
	end_bytes = (len - init_bytes) & 3;

	for (i = 0; i < init_bytes; i++) {
#ifndef WORDS_BIGENDIAN
		i0 = *p8++ ^ crc;
		crc = t0_le[i0] ^ (crc >> 8);
#else
		i0 = *p8++ ^ (crc >> 24);
		crc = t0_le[i0] ^ (crc << 8);
#endif
	}

	/* using pre-increment below slightly faster */
	p32--;

	for (i = 0; i < words; i++) {
#ifndef WORDS_BIGENDIAN
		q = *++p32 ^ crc;
		i3 = q;
		i2 = q >> 8;
		i1 = q >> 16;
		i0 = q >> 24;
		crc = t3_le[i3] ^ t2_le[i2] ^ t1_le[i1] ^ t0_le[i0];
#else
		q = *++p32 ^ crc;
		i3 = q >> 24;
		i2 = q >> 16;
		i1 = q >> 8;
		i0 = q;
		crc = t3_le[i3] ^ t2_le[i2] ^ t1_le[i1] ^ t0_le[i0];
#endif
	}

	p8 = (uint8_t *)(++p32);

	for (i = 0; i < end_bytes; i++) {
#ifndef WORDS_BIGENDIAN
		i0 = *p8++ ^ crc;
		crc = t0_le[i0] ^ (crc >> 8);
#else
		i0 = *p8++ ^ (crc >> 24);
		crc = t0_le[i0] ^ (crc << 8);
#endif
	}

	return __le32_to_cpu((__force __le32)crc);
}
#endif

#if CRC_BE_BITS == 32
static uint32_t crc32c_be_body(uint32_t crc, uint8_t const *buf, size_t len)
{
	const uint8_t *p8;
	const uint32_t *p32;
	size_t init_bytes;
	size_t words;
	size_t end_bytes;
	size_t i;
	uint32_t q;
	uint8_t i0, i1, i2, i3;

	crc = (__force uint32_t) __cpu_to_be32(crc);

	p8 = buf;
	p32 = (uint32_t *)PTR_ALIGN(p8, 4);
	init_bytes = min((uintptr_t)p32 - (uintptr_t)p8, len);
	words = (len - init_bytes) >> 2;
	end_bytes = (len - init_bytes) & 3;

	for (i = 0; i < init_bytes; i++) {
#ifndef WORDS_BIGENDIAN
		i0 = *p8++ ^ crc;
		crc = t0_be[i0] ^ (crc >> 8);
#else
		i0 = *p8++ ^ (crc >> 24);
		crc = t0_be[i0] ^ (crc << 8);
#endif
	}

	p32--;

	for (i = 0; i < words; i++) {
#ifndef WORDS_BIGENDIAN
		q = *++p32 ^ crc;
		i3 = q;
		i2 = q >> 8;
		i1 = q >> 16;
		i0 = q >> 24;
		crc = t3_be[i3] ^ t2_be[i2] ^ t1_be[i1] ^ t0_be[i0];
#else
		q = *++p32 ^ crc;
		i3 = q >> 24;
		i2 = q >> 16;
		i1 = q >> 8;
		i0 = q;
		crc = t3_be[i3] ^ t2_be[i2] ^ t1_be[i1] ^ t0_be[i0];
#endif
	}

	p8 = (uint8_t *)(++p32);

	for (i = 0; i < end_bytes; i++) {
#ifndef WORDS_BIGENDIAN
		i0 = *p8++ ^ crc;
		crc = t0_be[i0] ^ (crc >> 8);
#else
		i0 = *p8++ ^ (crc >> 24);
		crc = t0_be[i0] ^ (crc << 8);
#endif
	}

	return __be32_to_cpu((__force __be32)crc);
}
#endif

#if CRC_LE_BITS == 64
/* slice by 8 algorithm */
static uint32_t crc32c_le_body(uint32_t crc, uint8_t const *buf, size_t len)
{
	const uint8_t *p8;
	const uint32_t *p32;
	size_t init_bytes;
	size_t words;
	size_t end_bytes;
	size_t i;
	uint32_t q;
	uint8_t i0, i1, i2, i3;

	crc = (__force uint32_t) __cpu_to_le32(crc);

	p8 = buf;
	p32 = (const uint32_t *)PTR_ALIGN(p8, 8);
	init_bytes = min((uintptr_t)p32 - (uintptr_t)p8, len);
	words = (len - init_bytes) >> 3;
	end_bytes = (len - init_bytes) & 7;

	for (i = 0; i < init_bytes; i++) {
#ifndef WORDS_BIGENDIAN
		i0 = *p8++ ^ crc;
		crc = t0_le[i0] ^ (crc >> 8);
#else
		i0 = *p8++ ^ (crc >> 24);
		crc = t0_le[i0] ^ (crc << 8);
#endif
	}

	p32--;

	for (i = 0; i < words; i++) {
#ifndef WORDS_BIGENDIAN
		q = *++p32 ^ crc;
		i3 = q;
		i2 = q >> 8;
		i1 = q >> 16;
		i0 = q >> 24;
		crc = t7_le[i3] ^ t6_le[i2] ^ t5_le[i1] ^ t4_le[i0];

		q = *++p32;
		i3 = q;
		i2 = q >> 8;
		i1 = q >> 16;
		i0 = q >> 24;
		crc ^= t3_le[i3] ^ t2_le[i2] ^ t1_le[i1] ^ t0_le[i0];
#else
		q = *++p32 ^ crc;
		i3 = q >> 24;
		i2 = q >> 16;
		i1 = q >> 8;
		i0 = q;
		crc = t7_le[i3] ^ t6_le[i2] ^ t5_le[i1] ^ t4_le[i0];

		q = *++p32;
		i3 = q >> 24;
		i2 = q >> 16;
		i1 = q >> 8;
		i0 = q;
		crc ^= t3_le[i3] ^ t2_le[i2] ^ t1_le[i1] ^ t0_le[i0];
#endif
	}

	p8 = (const uint8_t *)(++p32);

	for (i = 0; i < end_bytes; i++) {
#ifndef WORDS_BIGENDIAN
		i0 = *p8++ ^ crc;
		crc = t0_le[i0] ^ (crc >> 8);
#else
		i0 = *p8++ ^ (crc >> 24);
		crc = t0_le[i0] ^ (crc << 8);
#endif
	}

	return __le32_to_cpu(crc);
}
#endif

#if CRC_BE_BITS == 64
static uint32_t crc32c_be_body(uint32_t crc, uint8_t const *buf, size_t len)
{
	const uint8_t *p8;
	const uint32_t *p32;
	size_t init_bytes;
	size_t words;
	size_t end_bytes;
	size_t i;
	uint32_t q;
	uint8_t i0, i1, i2, i3;

	crc = (__force uint32_t) __cpu_to_be32(crc);

	p8 = buf;
	p32 = (const uint32_t *)PTR_ALIGN(p8, 8);
	init_bytes = min((uintptr_t)p32 - (uintptr_t)p8, len);
	words = (len - init_bytes) >> 3;
	end_bytes = (len - init_bytes) & 7;

	for (i = 0; i < init_bytes; i++) {
#ifndef WORDS_BIGENDIAN
		i0 = *p8++ ^ crc;
		crc = t0_be[i0] ^ (crc >> 8);
#else
		i0 = *p8++ ^ (crc >> 24);
		crc = t0_be[i0] ^ (crc << 8);
#endif
	}

	p32--;

	for (i = 0; i < words; i++) {
#ifndef WORDS_BIGENDIAN
		q = *++p32 ^ crc;
		i3 = q;
		i2 = q >> 8;
		i1 = q >> 16;
		i0 = q >> 24;
		crc = t7_be[i3] ^ t6_be[i2] ^ t5_be[i1] ^ t4_be[i0];

		q = *++p32;
		i3 = q;
		i2 = q >> 8;
		i1 = q >> 16;
		i0 = q >> 24;
		crc ^= t3_be[i3] ^ t2_be[i2] ^ t1_be[i1] ^ t0_be[i0];
#else
		q = *++p32 ^ crc;
		i3 = q >> 24;
		i2 = q >> 16;
		i1 = q >> 8;
		i0 = q;
		crc = t7_be[i3] ^ t6_be[i2] ^ t5_be[i1] ^ t4_be[i0];

		q = *++p32;
		i3 = q >> 24;
		i2 = q >> 16;
		i1 = q >> 8;
		i0 = q;
		crc ^= t3_be[i3] ^ t2_be[i2] ^ t1_be[i1] ^ t0_be[i0];
#endif
	}

	p8 = (const uint8_t *)(++p32);

	for (i = 0; i < end_bytes; i++) {
#ifndef WORDS_BIGENDIAN
		i0 = *p8++ ^ crc;
		crc = t0_be[i0] ^ (crc >> 8);
#else
		i0 = *p8++ ^ (crc >> 24);
		crc = t0_be[i0] ^ (crc << 8);
#endif
	}

	return __be32_to_cpu(crc);
}
#endif

/**
 * crc32c_le() - Calculate bitwise little-endian CRC32c.
 * @crc: seed value for computation.  ~0 for ext4, sometimes 0 for
 *	other uses, or the previous crc32c value if computing incrementally.
 * @p: pointer to buffer over which CRC is run
 * @len: length of buffer @p
 */
uint32_t ext2fs_crc32c_le(uint32_t crc, unsigned char const *p, size_t len)
{
#if CRC_LE_BITS == 1
	int i;
	while (len--) {
		crc ^= *p++;
		for (i = 0; i < 8; i++)
			crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
	}
# elif CRC_LE_BITS == 2
	while (len--) {
		crc ^= *p++;
		crc = (crc >> 2) ^ t0_le[crc & 0x03];
		crc = (crc >> 2) ^ t0_le[crc & 0x03];
		crc = (crc >> 2) ^ t0_le[crc & 0x03];
		crc = (crc >> 2) ^ t0_le[crc & 0x03];
	}
# elif CRC_LE_BITS == 4
	while (len--) {
		crc ^= *p++;
		crc = (crc >> 4) ^ t0_le[crc & 0x0f];
		crc = (crc >> 4) ^ t0_le[crc & 0x0f];
	}
# elif CRC_LE_BITS == 8
	while (len--) {
		crc ^= *p++;
		crc = (crc >> 8) ^ t0_le[crc & 0xff];
	}
# else
	crc = crc32c_le_body(crc, p, len);
# endif
	return crc;
}

/**
 * crc32c_be() - Calculate bitwise big-endian CRC32c.
 * @crc: seed value for computation.  ~0 for ext4, sometimes 0 for
 *	other uses, or the previous crc32c value if computing incrementally.
 * @p: pointer to buffer over which CRC is run
 * @len: length of buffer @p
 */
uint32_t ext2fs_crc32c_be(uint32_t crc, unsigned char const *p, size_t len)
{
#if CRC_BE_BITS == 1
	int i;
	while (len--) {
		crc ^= *p++ << 24;
		for (i = 0; i < 8; i++)
			crc = (crc << 1) ^
			      ((crc & 0x80000000) ? CRCPOLY_BE : 0);
	}
# elif CRC_BE_BITS == 2
	while (len--) {
		crc ^= *p++ << 24;
		crc = (crc << 2) ^ t0_be[crc >> 30];
		crc = (crc << 2) ^ t0_be[crc >> 30];
		crc = (crc << 2) ^ t0_be[crc >> 30];
		crc = (crc << 2) ^ t0_be[crc >> 30];
	}
# elif CRC_BE_BITS == 4
	while (len--) {
		crc ^= *p++ << 24;
		crc = (crc << 4) ^ t0_be[crc >> 28];
		crc = (crc << 4) ^ t0_be[crc >> 28];
	}
# elif CRC_BE_BITS == 8
	while (len--) {
		crc ^= *p++ << 24;
		crc = (crc << 8) ^ t0_be[crc >> 24];
	}
# else
	crc = crc32c_be_body(crc, p, len);
# endif
	return crc;
}

#ifdef UNITTEST
static uint8_t test_buf[] = {
	0xd9, 0xd7, 0x6a, 0x13, 0x3a, 0xb1, 0x05, 0x48,
	0xda, 0xad, 0x14, 0xbd, 0x03, 0x3a, 0x58, 0x5e,
	0x6e, 0xd1, 0x56, 0xc9, 0x2e, 0xc4, 0xcb, 0x6b,
	0xe8, 0x77, 0x52, 0x37, 0x4e, 0x0f, 0x55, 0xd2,
	0x12, 0x65, 0x90, 0xc2, 0x41, 0x49, 0x81, 0x01,
	0xf5, 0x01, 0xeb, 0x2d, 0x78, 0x74, 0x23, 0x5d,
	0x84, 0x5c, 0x81, 0x92, 0x21, 0xe9, 0x8d, 0x1d,
	0x89, 0xf2, 0x4a, 0xac, 0xdd, 0xf9, 0xaf, 0xee,
	0x44, 0xe7, 0x6e, 0xed, 0xfb, 0xd8, 0x89, 0x0e,
	0x96, 0x62, 0xcd, 0xa4, 0x4b, 0xa9, 0xe5, 0x45,
	0xb1, 0x29, 0x9b, 0x0f, 0xfc, 0xbd, 0x83, 0xab,
	0xa8, 0x54, 0x96, 0x44, 0x2c, 0x7f, 0xbb, 0xe7,
	0x52, 0x29, 0x08, 0xee, 0x14, 0xc5, 0xc2, 0xec,
	0x5a, 0xeb, 0x40, 0x40, 0xea, 0xd1, 0x3d, 0x15,
	0x73, 0xaa, 0x8c, 0x73, 0xfc, 0xf2, 0x2b, 0x49,
	0x0b, 0x13, 0x96, 0xd9, 0x8e, 0x4b, 0xbc, 0xe0,
	0xf4, 0xd2, 0xe0, 0x2e, 0x7a, 0xf0, 0x5d, 0x1f,
	0xd2, 0x92, 0x97, 0xe0, 0xaa, 0x59, 0xab, 0xc9,
	0x5c, 0xa6, 0x51, 0x1a, 0xe3, 0xd6, 0x06, 0xb9,
	0xae, 0xb8, 0x76, 0x36, 0x79, 0x37, 0x52, 0xf6,
	0x34, 0xaf, 0x27, 0x19, 0xe1, 0xc0, 0x2b, 0xdd,
	0x01, 0x15, 0xcd, 0xce, 0x44, 0xf6, 0x4c, 0x18,
	0x92, 0x69, 0xbe, 0x8a, 0x76, 0x23, 0x52, 0x13,
	0x3f, 0xf9, 0xe0, 0xf5, 0x06, 0x28, 0x7c, 0xc7,
	0xf3, 0x42, 0x0f, 0xdd, 0x40, 0x33, 0xf7, 0x99,
	0xe2, 0xad, 0x26, 0xd9, 0x53, 0x10, 0x72, 0x0c,
	0x4e, 0x43, 0x4c, 0x61, 0xfe, 0xd9, 0xc1, 0x16,
	0xa1, 0x93, 0xca, 0x3c, 0x75, 0x7f, 0x07, 0x7a,
	0x65, 0xb3, 0x53, 0x2a, 0x52, 0x00, 0xa0, 0x62,
	0xe0, 0xa3, 0x1f, 0xad, 0xd7, 0xbb, 0xc0, 0x83,
	0x5d, 0x54, 0x87, 0x5f, 0xc8, 0x2f, 0xc8, 0xbf,
	0x69, 0x04, 0x91, 0xc8, 0xa6, 0x1d, 0x4d, 0x46,
	0x91, 0xfc, 0x26, 0xf4, 0x16, 0xd1, 0xa4, 0xbf,
	0x5c, 0xa2, 0x6c, 0xdd, 0xb4, 0x40, 0xf2, 0x2e,
	0xa2, 0xad, 0xf7, 0xf4, 0xa5, 0x8a, 0x3e, 0x23,
	0x64, 0x08, 0xc8, 0xa1, 0xa0, 0xf0, 0x5d, 0x70,
	0xd2, 0x77, 0xfd, 0xc8, 0x50, 0x83, 0x0f, 0xd6,
	0x2b, 0xe4, 0x1f, 0x52, 0x34, 0x33, 0x68, 0xfd,
	0x92, 0xbe, 0x9f, 0x97, 0x6b, 0x8d, 0x81, 0x91,
	0x0f, 0xef, 0x65, 0xc8, 0x0d, 0x15, 0x01, 0x77,
	0x58, 0xb2, 0xf4, 0x1b, 0x06, 0x7e, 0xf5, 0xca,
	0x15, 0x2e, 0x38, 0xd8, 0x81, 0x1c, 0x1c, 0xa0,
	0xb6, 0x13, 0x6a, 0x2b, 0x71, 0x34, 0x52, 0xd7,
	0x1d, 0xbd, 0x37, 0x59, 0xbc, 0x86, 0x25, 0x2b,
	0xa8, 0x93, 0xce, 0x1a, 0x03, 0x16, 0xfe, 0x01,
	0x57, 0x99, 0x24, 0x25, 0x2c, 0xb3, 0xab, 0x1e,
	0x2d, 0x65, 0x20, 0x89, 0x17, 0x02, 0x0e, 0x0a,
	0xf5, 0x1e, 0xc7, 0xff, 0x1f, 0x61, 0xa9, 0x54,
	0x18, 0xd4, 0xba, 0x50, 0x57, 0x02, 0xa1, 0xab,
	0x22, 0x2e, 0x07, 0xea, 0xa9, 0xa3, 0x83, 0x4f,
	0x27, 0xf5, 0xc5, 0xee, 0x3c, 0x3b, 0x10, 0xad,
	0x32, 0x2b, 0x1c, 0x03, 0xcb, 0xaf, 0x98, 0x83,
	0x54, 0xc3, 0x68, 0x63, 0xd4, 0xe0, 0x0e, 0x3c,
	0x1a, 0x4e, 0xc0, 0x81, 0xd0, 0xe8, 0x6a, 0x62,
	0x6b, 0x3e, 0x6f, 0xc4, 0xc6, 0x33, 0x4e, 0x26,
	0x21, 0xf5, 0x04, 0xdf, 0xfa, 0xce, 0x45, 0xaf,
	0xdc, 0x5e, 0x1b, 0xad, 0x93, 0xca, 0xf5, 0xcf,
	0xd7, 0xee, 0x0c, 0x5c, 0x5e, 0xb4, 0xf0, 0x92,
	0xd2, 0xf2, 0xf0, 0xa9, 0x1e, 0xab, 0x80, 0x68,
	0x46, 0xef, 0xcc, 0x26, 0x0c, 0x5c, 0xdd, 0x4e,
	0x83, 0xb8, 0xb9, 0x53, 0x6e, 0xf8, 0x93, 0x38,
	0x67, 0xa4, 0x41, 0x87, 0x72, 0xe7, 0x7e, 0x86,
	0xc9, 0x49, 0x00, 0x33, 0xb1, 0x38, 0x6c, 0x71,
	0xd7, 0x1d, 0x8e, 0x61, 0x01, 0xb6, 0x57, 0xa9,
	0xf1, 0xac, 0x15, 0xc2, 0x83, 0x77, 0xca, 0x64,
	0xca, 0x7b, 0x6c, 0xa1, 0x10, 0x1b, 0x13, 0xd0,
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	0xb0, 0xcc, 0xc4, 0xe3, 0x33, 0xf3, 0x18, 0xba,
	0xec, 0x56, 0xd9, 0x1c, 0x40, 0x70, 0x0d, 0x4e,
	0x97, 0x01, 0x23, 0xf3, 0x5a, 0xdc, 0xbf, 0x68,
	0x93, 0xc2, 0x1d, 0x8a, 0x96, 0xb7, 0xac, 0x18,
	0x6f, 0xf7, 0x84, 0x71, 0x0d, 0x3d, 0xf8, 0xba,
	0xdf, 0xb6, 0x89, 0x1d, 0x78, 0x19, 0xf2, 0x59,
	0xe9, 0x15, 0x55, 0x29, 0x73, 0x50, 0x59, 0x14,
	0x02, 0x21, 0x16, 0x8f, 0x0f, 0xdf, 0xa5, 0xf0,
};

static struct crc_test {
	uint32_t crc;		/* random starting crc */
	uint32_t start;		/* random offset in buf */
	uint32_t length;	/* random length of test */
	uint32_t crc_le;	/* expected crc32_le result */
	uint32_t crc_be;	/* expected crc32_be result */
} test[] = {
	{0xffffffff, 0x00000000, 0x00001000, 0x13934bef, 0x14f3b75f},
	{0xfe7328ea, 0x00000763, 0x00000717, 0xed2c0d70, 0x57531214},
	{0x4c40684e, 0x00000721, 0x0000011e, 0xd7f46ccc, 0xedf12ec3},
	{0x6b487f90, 0x00000264, 0x000007bc, 0x759e9939, 0x9af8e387},
	{0x9f5810db, 0x00000afa, 0x00000255, 0x2685197f, 0x716de6ed},
	{0xb15c4755, 0x00000d5b, 0x000002a4, 0xd8fadcb5, 0xfc34ae3f},
	{0x06518253, 0x00000ffb, 0x00000004, 0xabee2433, 0xfa30ac9e},
	{0xd9e71c55, 0x00000a2a, 0x00000259, 0x96682af2, 0xe5907ea3},
	{0x0c1ae843, 0x00000ce4, 0x0000031b, 0x7b637c43, 0xe7f71b04},
	{0xec3cd517, 0x000002ff, 0x00000566, 0x5d719a77, 0xed16e045},
	{0x77828e95, 0x0000067f, 0x0000038f, 0x43ee5b6c, 0x35999927},
	{0xec87b4e3, 0x00000d1c, 0x000002e3, 0x2ddd2eee, 0x9452d3f8},
	{0x412158bb, 0x00000eee, 0x00000111, 0x67b38ba2, 0x177976d0},
	{0x2e52de3e, 0x00000c4a, 0x000003b5, 0xbcc5d61d, 0xf60fee71},
	{0x6ddaae8b, 0x00000d99, 0x00000266, 0x8b535544, 0x1dab8596},
	{0x049b6cb1, 0x000009c5, 0x000000b0, 0xfc22cabc, 0x47ebc954},
	{0x77d4b954, 0x0000028a, 0x000007fa, 0x71d00923, 0x905585ef},
	{0x5e192355, 0x00000ac1, 0x000001fa, 0xb966b81a, 0x33c12903},
	{0x7d80b71d, 0x00000213, 0x000001e0, 0x2bba371a, 0x5f4bd8d9},
	{0x01f6f1e4, 0x000001d6, 0x00000395, 0xb7e8a647, 0x2a7943a1},
	{0x1dfabb13, 0x00000e14, 0x000001eb, 0x53917fba, 0x8dee1e5d},
	{0xb00a4449, 0x00000bf6, 0x00000409, 0xedecb577, 0x628e087d},
	{0x7ecd3981, 0x0000083f, 0x0000016b, 0xefef62b9, 0xda4f94e6},
	{0xf8f330d2, 0x000004be, 0x00000757, 0x9357c9f3, 0x8e2d5c2f},
	{0x03c38af2, 0x00000d23, 0x000002dc, 0x360fa8c0, 0x6294c0d6},
	{0x687bb79b, 0x00000f3d, 0x000000c2, 0x448d3be2, 0x08f48f3a},
	{0x6710f550, 0x000009e9, 0x00000603, 0xdbfd1998, 0xc950ac29},
	{0x873171d1, 0x00000787, 0x000004d5, 0xab7f1b62, 0xe66896ab},
	{0x373b1314, 0x00000f0f, 0x000000f0, 0x184098ab, 0x4038e674},
	{0x90fad9cd, 0x00000ead, 0x00000152, 0x23ce52ff, 0x9eff3974},
	{0x19676fe7, 0x0000007d, 0x0000070d, 0xf8a76f1e, 0xfbc5c8a9},
	{0x89facd45, 0x000005f3, 0x00000473, 0x4331a006, 0xb8f0f0cc},
	{0x6f173747, 0x00000fc3, 0x0000003c, 0xb012f08e, 0x5126e378},
	{0x4b44a106, 0x0000075a, 0x0000008b, 0xf6f7ac38, 0xf9b1781b},
	{0xb620ad06, 0x00000774, 0x0000017e, 0xd34558e6, 0xb175edd3},
	{0x976f21e9, 0x000008d7, 0x0000034a, 0xe533aa3a, 0x1e4367b9},
	{0x687628c0, 0x000006c5, 0x0000061b, 0x3a840b15, 0xfb5989a0},
	{0xe24ac108, 0x00000cd0, 0x0000032f, 0x51010ae8, 0xcdd8f182},
	{0x361c44a3, 0x00000304, 0x00000719, 0xfd7bd481, 0x12de540f},
	{0xd93ff95e, 0x00000db7, 0x0000008e, 0xcfbbc304, 0x42eecd5a},
	{0xed752d12, 0x00000883, 0x00000091, 0x65a6c868, 0x9ebfa578},
	{0xb4ff4b54, 0x000003d3, 0x000001c1, 0xf82597e7, 0xa8ad2b19},
	{0x111b520f, 0x00000708, 0x000000eb, 0xc3e109f3, 0x323ace17},
	{0x62c806f2, 0x00000ba3, 0x0000045c, 0x874d3a72, 0xaf1a1360},
	{0x40d97470, 0x000005e1, 0x0000058d, 0x87a9684f, 0x524244a8},
	{0x4312179c, 0x00000056, 0x0000070e, 0x809a00f5, 0xf9e940b0},
	{0x13d5f84c, 0x00000a2d, 0x00000104, 0xf3d27578, 0x5d33341c},
	{0x1f302cb2, 0x00000151, 0x00000014, 0x1e162693, 0x53c3cfc3},
	{0xe491db24, 0x00000600, 0x000006f6, 0x7ff09615, 0xa300ecf7},
	{0xf9a98069, 0x000002ba, 0x000002ad, 0x01af7387, 0x31c0911e},
	{0xe9c477ad, 0x0000015f, 0x00000778, 0x6facf9a0, 0x1993b688},
	{0x353f32b2, 0x0000087c, 0x00000783, 0x6cc964ea, 0x418db561},
	{0x78e1b24f, 0x00000650, 0x000006a8, 0xb3bb7c27, 0xf2aad006},
	{0x61aa400e, 0x00000049, 0x00000254, 0xb8cd1681, 0x79150b15},
	{0xb84b10b0, 0x00000f73, 0x0000008c, 0x406a6450, 0x0c705222},
	{0x9fa99c9c, 0x00000a7c, 0x000004d7, 0xfb3d21b4, 0xe4e789df},
	{0x3fc9ebe3, 0x00000cd9, 0x000000d6, 0x43803f9c, 0x5a152be5},
	{0x529879cd, 0x000002f2, 0x00000595, 0x78b4c6a6, 0xf7236ec4},
	{0x3a933019, 0x00000516, 0x00000266, 0xdcb45436, 0x2c7935f5},
	{0x887b4977, 0x00000227, 0x0000038d, 0xc5f7c3d9, 0x0d6d7df6},
	{0x770745de, 0x000008c6, 0x00000739, 0xf69145e8, 0x47d5efc9},
	{0x28be3b47, 0x00000c46, 0x0000032b, 0x764c028f, 0x1eb70d64},
	{0x5013a050, 0x00000cf6, 0x00000309, 0xea8fe164, 0x186affa4},
	{0x2ec4c9ba, 0x000006e8, 0x0000078d, 0xa35557a9, 0xb41f49ec},
	{0xa9f950c9, 0x00000d33, 0x000002cc, 0x41ea8618, 0xab8dfae3},
	{0x5b520229, 0x000007b2, 0x00000484, 0x44569f1f, 0x607a8052},
	{0xd8dcbbfc, 0x0000002f, 0x0000048c, 0xdb88ab8b, 0xf1c411f1},
	{0x25529792, 0x00000d1d, 0x000002e2, 0x20cda404, 0x32683a2d},
	{0x9f3f6d71, 0x00000238, 0x0000079a, 0x0720443e, 0x4b8ba2ff},
	{0x64121215, 0x000007ff, 0x0000038f, 0x6aacff2c, 0x3b84233b},
	{0xfb6cdde0, 0x00000ef8, 0x00000107, 0xbd43a0f1, 0x926624d0},
	{0x221c9d6f, 0x000007b6, 0x0000014f, 0xb67f834b, 0x2bdedda4},
	{0x030e1de4, 0x00000836, 0x000004b4, 0x0d67d26a, 0x75a73b73},
	{0xb56fa6cf, 0x00000c07, 0x000003f8, 0x60601ac1, 0x10a43f35},
	{0xb55c89f5, 0x0000098e, 0x000001d4, 0x2400efbe, 0x006e28eb},
	{0x5e90b6d5, 0x0000070b, 0x000003ea, 0x3bb5d6ea, 0xb175fa6b},
	{0x2a7045ae, 0x00000961, 0x00000633, 0xfca89e4b, 0x962cd6d2},
	{0x8b374ea9, 0x000006ba, 0x00000780, 0xbce036ed, 0x4dc8279b},
	{0x8bd90bc9, 0x00000562, 0x00000369, 0xcb26a24b, 0x50dee743},
	{0x5b1b1762, 0x000000fd, 0x0000051a, 0x33cdda07, 0xee75ff7b},
	{0xa4153555, 0x0000058f, 0x000005c7, 0xbe50eeca, 0xe73fffcc},
	{0x0be1f931, 0x00000651, 0x00000672, 0x95a25753, 0x4ad6270f},
	{0xb7e78618, 0x00000a7f, 0x000002bb, 0xe06bcc1c, 0x1a35ee59},
	{0x4a9bc41b, 0x00000e51, 0x000001ae, 0x709e8d2c, 0x75080ca8},
	{0xfc359d13, 0x00000440, 0x000002f8, 0x0a58451f, 0x6fa3cfbf},
	{0x5aa48619, 0x000006d1, 0x00000284, 0x928ead83, 0xbd600efc},
	{0xa609afa8, 0x0000053e, 0x00000272, 0xb048c141, 0x184f80bb},
	{0x3f108afb, 0x00000949, 0x00000150, 0x9a6bb5bc, 0x0ea02be1},
	{0x79bec2d3, 0x000008ed, 0x00000712, 0x32692d57, 0x2eb13289},
	{0x9429e067, 0x00000bc3, 0x0000043c, 0x5295ceff, 0x8a9014a7},
	{0xae58b96a, 0x0000082d, 0x000007d2, 0xc2a681ba, 0x6af94089},
	{0x95df24be, 0x00000985, 0x000004c1, 0x3a287765, 0x379fcb42},
	{0x5e94976f, 0x00000596, 0x000004ed, 0xff00c489, 0x991fc1f5},
	{0xf5e5f1de, 0x00000d31, 0x000002ce, 0x35f28e91, 0x543def1a},
	{0xa2c219cf, 0x00000a3c, 0x00000374, 0x707d21eb, 0xa6d28bc1},
	{0xf21b6ceb, 0x00000919, 0x00000135, 0x0847fb8b, 0x224468c2},
	{0xaa988728, 0x00000787, 0x00000771, 0x885aeaa4, 0x814db00b},
	{0xaa5dfaac, 0x000003e5, 0x0000051b, 0x52c48ab7, 0x725bef8a},
	{0x0a053968, 0x00000d2a, 0x000002d5, 0x7a90256d, 0xc53b9402},
	{0x1421dc20, 0x00000eef, 0x00000110, 0x97d6da24, 0x10846935},
	{0xb47c2166, 0x00000a6a, 0x00000209, 0xcfd6cc52, 0x46e2797e},
	{0x77dd1955, 0x000000de, 0x00000266, 0xba74bcaa, 0x4fa3fe9c},
	{0x68a03cc2, 0x0000082f, 0x000007b0, 0x752bd5d8, 0x4f760c63},
	{0x0226b0a3, 0x00000a5f, 0x000005a0, 0x82de4970, 0x8ee1310e},
	{0x637bf3b1, 0x00000d93, 0x0000026c, 0x5c7115cb, 0x9f6a0ced},
	{0x3b120edf, 0x00000c13, 0x000003ec, 0x80d7d20f, 0x241657d5},
	{0xe2456780, 0x000002eb, 0x00000641, 0xc0a5d289, 0x74df96b4},
	{0x9b2e7125, 0x00000c0c, 0x000003f3, 0xcc15f57e, 0x03e290bf},
	{0x153033ef, 0x00000787, 0x000006b6, 0x3cde443b, 0x7bf1d121},
	{0x18458b3f, 0x0000066c, 0x00000561, 0x9a2bd8c6, 0x9d564bef},
	{0x4ff9d4b9, 0x00000c8f, 0x0000033a, 0xd0ee6d6d, 0xee00aa0b},
	{0xdf84b5d9, 0x00000802, 0x0000029a, 0xdab0d74a, 0xd0cb63dc},
	{0x81ee15df, 0x000003ce, 0x00000725, 0x9942e2de, 0xe48fb26b},
	{0x5c768e04, 0x00000afd, 0x00000160, 0x36110831, 0x8dc74483},
	{0xe5e18094, 0x00000b4b, 0x000000a0, 0xffa3e4a7, 0xc0145e1b},
	{0xed7263b6, 0x00000d0d, 0x000002f2, 0xb0006a35, 0x5468ae3a},
	{0x5bfde7d7, 0x000006fb, 0x00000554, 0xa4193b76, 0xb73d34b2},
	{0x67f4a743, 0x00000b85, 0x0000047a, 0xf05c8d8f, 0x4f843e49},
	{0xf13bdf22, 0x00000ff7, 0x00000008, 0x816351eb, 0x41f537f6},
	{0x08ecc608, 0x00000d5d, 0x00000098, 0x90492772, 0xf5172204},
	{0x296f52ba, 0x000004f9, 0x00000788, 0x5e5a4896, 0xe01d5b46},
	{0xbe4624c2, 0x00000427, 0x000004ef, 0xcd267b94, 0x7b9069f4},
	{0x906f7c7c, 0x00000a05, 0x0000003f, 0x03fcfc33, 0x7b6ff563},
	{0x8f7b323e, 0x00000458, 0x000004c7, 0xcd4969c8, 0xd4c22ada},
	{0x88d6593d, 0x00000597, 0x000005b5, 0xf199cd3b, 0x5c3e8ca2},
	{0x978a7768, 0x00000268, 0x000001d3, 0xb28c95bd, 0x49a2cc67},
	{0x857a621e, 0x000007a7, 0x000003a8, 0xf4bf84ab, 0xde26f369},
	{0xb0e121ef, 0x000005be, 0x00000644, 0x28747c14, 0x61d4dc6b},
	{0, 0, 0, 0, 0},
};

static int test_crc32c(void)
{
	struct crc_test *t = test;
	int failures = 0;

	while (t->length) {
		uint32_t be, le;
		le = ext2fs_crc32c_le(t->crc, test_buf + t->start, t->length);
		be = ext2fs_crc32c_be(t->crc, test_buf + t->start, t->length);
		if (le != t->crc_le) {
			printf("Test %d LE fails, %x != %x\n",
			       (int) (t - test), le, t->crc_le);
			failures++;
		}
		if (be != t->crc_be) {
			printf("Test %d BE fails, %x != %x\n",
			       (int) (t - test), be, t->crc_be);
			failures++;
		}
		t++;
	}

	return failures;
}

int main(int argc, char *argv[])
{
	int ret;

	ret = test_crc32c();
	if (!ret)
		printf("No failures.\n");

	return ret;
}
#endif /* UNITTEST */