cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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xz_stream.h (1470B)

      1/*
      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 * https://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"
     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 indicating that the value is unknown.
     37 *
     38 * Experimental: vli_type can be defined to uint32_t to save a few bytes
     39 * in code size (no effect on speed). Doing so limits the uncompressed and
     40 * compressed size of the file to less than 256 MiB and may also weaken
     41 * error detection slightly.
     42 */
     43typedef uint64_t vli_type;
     44
     45#define VLI_MAX ((vli_type)-1 / 2)
     46#define VLI_UNKNOWN ((vli_type)-1)
     47
     48/* Maximum encoded size of a VLI */
     49#define VLI_BYTES_MAX (sizeof(vli_type) * 8 / 7)
     50
     51/* Integrity Check types */
     52enum xz_check {
     53	XZ_CHECK_NONE = 0,
     54	XZ_CHECK_CRC32 = 1,
     55	XZ_CHECK_CRC64 = 4,
     56	XZ_CHECK_SHA256 = 10
     57};
     58
     59/* Maximum possible Check ID */
     60#define XZ_CHECK_MAX 15
     61
     62#endif