Module: Omnizip::Formats::XzConst

Included in:

Omnizip::Formats::Xz::Writer, Omnizip::Formats::XzImpl::BlockEncoder, Omnizip::Formats::XzImpl::IndexEncoder, Omnizip::Formats::XzImpl::StreamEncoder, Omnizip::Formats::XzImpl::StreamFooter, Omnizip::Formats::XzImpl::StreamHeader

Defined in:

lib/omnizip/formats/xz_const.rb

Overview

XZ Format Constants (from XZ Utils specification)

Constant Summary

MAGIC =

XZ Stream magic bytes

[0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00].freeze

FOOTER_MAGIC =

Footer magic bytes

[0x59, 0x5A].freeze

STREAM_HEADER_SIZE =

Header and footer sizes

12

STREAM_FOOTER_SIZE =

12

STREAM_FLAGS_SIZE =

Stream flags size

2

BLOCK_HEADER_SIZE_MIN =

Block header constraints

8

BLOCK_HEADER_SIZE_MAX =

1024

BACKWARD_SIZE_MIN =

Backward size constraints

4

BACKWARD_SIZE_MAX =

~17 GB

(1 << 34) - 4

CHECK_NONE =

Check types (from lzma/check.h)

0

CHECK_CRC32 =

1

CHECK_CRC64 =

4

CHECK_SHA256 =

10

VLI_UNKNOWN =

VLI (Variable Length Integer) constants

0xFFFFFFFFFFFFFFFF

VLI_BYTES_MAX =

LZMA_VLI_UNKNOWN

9

FILTER_LZMA2 =

Filter IDs (from lzma/check.h) XZ Utils uses LZMA_FILTER_LZMA2 = 0x21 (as defined in lzma/lzma12.h:61)

0x21

FILTERS_MAX =

Maximum number of filters in a chain

4

INDEX_INDICATOR =

Index indicator (byte value that signals start of index)

0x00