| /* |
| * 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 |
