libunarchive/unxz/xz_stream.h

/*
 * Definitions for handling the .xz file format
 *
 * Author: Lasse Collin <lasse.collin@tukaani.org>
 *
 * This file has been put into the public domain.
 * You can do whatever you want with this file.
 */

#ifndef XZ_STREAM_H
#define XZ_STREAM_H

#if defined(__KERNEL__) && !XZ_INTERNAL_CRC32
#	include <linux/crc32.h>
#	undef crc32
#	define xz_crc32(buf, size, crc) \
		(~crc32_le(~(uint32_t)(crc), buf, size))
#endif

/*
 * See the .xz file format specification at
 * http://tukaani.org/xz/xz-file-format.txt
 * to understand the container format.
 */

#define STREAM_HEADER_SIZE 12

#define HEADER_MAGIC "\3757zXZ\0"
#define HEADER_MAGIC_SIZE 6

#define FOOTER_MAGIC "YZ"
#define FOOTER_MAGIC_SIZE 2

/*
 * Variable-length integer can hold a 63-bit unsigned integer, or a special
 * value to indicate that the value is unknown.
 */
typedef uint64_t vli_type;

#define VLI_MAX ((vli_type)-1 / 2)
#define VLI_UNKNOWN ((vli_type)-1)

/* Maximum encoded size of a VLI */
#define VLI_BYTES_MAX (sizeof(vli_type) * 8 / 7)

/* Integrity Check types */
enum xz_check {
	XZ_CHECK_NONE = 0,
	XZ_CHECK_CRC32 = 1,
	XZ_CHECK_CRC64 = 4,
	XZ_CHECK_SHA256 = 10
};

/* Maximum possible Check ID */
#define XZ_CHECK_MAX 15

#endif
1	niro	1123	/*
2			* Definitions for handling the .xz file format
3			*
4			* Author: Lasse Collin <lasse.collin@tukaani.org>
5			*
6			* This file has been put into the public domain.
7			* You can do whatever you want with this file.
8			*/
9
10			#ifndef XZ_STREAM_H
11			#define XZ_STREAM_H
12
13			#if defined(__KERNEL__) && !XZ_INTERNAL_CRC32
14			# include <linux/crc32.h>
15			# undef crc32
16			# define xz_crc32(buf, size, crc) \
17			(~crc32_le(~(uint32_t)(crc), buf, size))
18			#endif
19
20			/*
21			* See the .xz file format specification at
22			* http://tukaani.org/xz/xz-file-format.txt
23			* to understand the container format.
24			*/
25
26			#define STREAM_HEADER_SIZE 12
27
28			#define HEADER_MAGIC "\3757zXZ\0"
29			#define HEADER_MAGIC_SIZE 6
30
31			#define FOOTER_MAGIC "YZ"
32			#define FOOTER_MAGIC_SIZE 2
33
34			/*
35			* Variable-length integer can hold a 63-bit unsigned integer, or a special
36			* value to indicate that the value is unknown.
37			*/
38			typedef uint64_t vli_type;
39
40			#define VLI_MAX ((vli_type)-1 / 2)
41			#define VLI_UNKNOWN ((vli_type)-1)
42
43			/* Maximum encoded size of a VLI */
44			#define VLI_BYTES_MAX (sizeof(vli_type) * 8 / 7)
45
46			/* Integrity Check types */
47			enum xz_check {
48			XZ_CHECK_NONE = 0,
49			XZ_CHECK_CRC32 = 1,
50			XZ_CHECK_CRC64 = 4,
51			XZ_CHECK_SHA256 = 10
52			};
53
54			/* Maximum possible Check ID */
55			#define XZ_CHECK_MAX 15
56
57			#endif