Method: Zip::ZipEntry#read_c_dir_entry

Defined in:

lib/ruby_archive/handlers/rubyzip/zip/zip.rb

#read_c_dir_entry(io) ⇒ Object

:nodoc:all

# File 'lib/ruby_archive/handlers/rubyzip/zip/zip.rb', line 589

def read_c_dir_entry(io)  #:nodoc:all
  staticSizedFieldsBuf = io.read(CDIR_ENTRY_STATIC_HEADER_LENGTH)
  unless (staticSizedFieldsBuf.size == CDIR_ENTRY_STATIC_HEADER_LENGTH)
  raise ZipError, "Premature end of file. Not enough data for zip cdir entry header"
  end

  @header_signature          ,
  @version               , # version of encoding software
    @fstype                , # filesystem type
  @versionNeededToExtract,
  @gp_flags               ,
  @compression_method     ,
  lastModTime            ,
  lastModDate            ,
  @crc                   ,
  @compressed_size        ,
  @size                  ,
  nameLength             ,
  extraLength            ,
  commentLength          ,
  diskNumberStart        ,
  @internalFileAttributes,
  @externalFileAttributes,
  @localHeaderOffset     ,
  @name                  ,
  @extra                 ,
  @comment               = staticSizedFieldsBuf.unpack('VCCvvvvvVVVvvvvvVV')

  unless (@header_signature == CENTRAL_DIRECTORY_ENTRY_SIGNATURE)
  raise ZipError, "Zip local header magic not found at location '#{localHeaderOffset}'"
  end
  set_time(lastModDate, lastModTime)
  
  @name                  = io.read(nameLength)
  if ZipExtraField === @extra
    @extra.merge(io.read(extraLength))
  else
    @extra = ZipExtraField.new(io.read(extraLength))
  end
  @comment               = io.read(commentLength)
  unless (@comment && @comment.length == commentLength)
  raise ZipError, "Truncated cdir zip entry header"
  end

  case @fstype
  when FSTYPE_UNIX
    @unix_perms = (@externalFileAttributes >> 16) & 07777

    case (@externalFileAttributes >> 28)
    when 04
      @ftype = :directory
    when 010
      @ftype = :file
    when 012
      @ftype = :symlink
    else
      raise ZipInternalError, "unknown file type #{'0%o' % (@externalFileAttributes >> 28)}"
    end
  else
    if name_is_directory?
      @ftype = :directory
    else
      @ftype = :file
    end
  end
  @local_header_size = calculate_local_header_size
end