Sha256: c74309947271c78ebd84ceb941265b3261e0c6188c83021b33572bc138e7789c
Contents?: true
Size: 1.54 KB
Versions: 66
Compression:
Stored size: 1.54 KB
Contents
require 'fs/xfs/directory'
require 'fs/xfs/directory2_data_header'
require 'fs/xfs/directory3_data_header'
require 'fs/xfs/superblock'
module XFS
DIRECTORY_DATA_FREE = BinaryStruct.new([
'S>', 'offset', # start of freespace
'S>', 'length', # length of freespace
])
SIZEOF_DIRECTORY_DATA_FREE = DIRECTORY_DATA_FREE.size
class DirectoryDataHeader
XFS_DIR2_DATA_FD_COUNT = 3
attr_reader :data_header, :header_end, :version_3
def decode_directory_header(data, header)
template = header.template
@data_header = template.decode(data)
header.magic_numbers.each { |magic_number| return template.size if @data_header['magic'] == magic_number }
raise "XFS::DirectoryDataHeader: Invalid Magic Number #{@data_header['magic']}"
end
def initialize(data, sb)
@sb = sb
if @sb.version_has_crc?
version_header = Directory3DataHeader.new
else
version_header = Directory2DataHeader.new
end
@version_3 = version_header.version_3
header_size = decode_directory_header(data, version_header)
free_offset = header_size
@data_free = []
@free_end = 0
(1..XFS_DIR2_DATA_FD_COUNT).each do |i|
@free_end = header_size + SIZEOF_DIRECTORY_DATA_FREE * i
@data_free[i] = DIRECTORY_DATA_FREE.decode(data[free_offset..@free_end])
free_offset = @free_end
end
@header_end = @free_end
@header_end += version_header.pad
end
end # class DirectoryDataHeader
end # module XFS
Version data entries
66 entries across 66 versions & 1 rubygems