Class: Racknga::ReverseLineReader

Inherits:

Object

• Object
• Racknga::ReverseLineReader

show all

Defined in:

lib/racknga/reverse_line_reader.rb

Constant Summary

BYTES_PER_READ =

4096

Instance Method Summary (collapse)

• - (Object) each {|@buffer| ... }
• - (ReverseLineReader) initialize(io) constructor

  A new instance of ReverseLineReader.

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# File 'lib/racknga/reverse_line_reader.rb', line 21

def initialize(io)
  @io = io
  @io.seek(0, IO::SEEK_END)
  @buffer = ""
  @data = ""
end

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# File 'lib/racknga/reverse_line_reader.rb', line 28

def each
  separator = $/
  separator_length = separator.length
  while read_to_buffer
    loop do
      index = @buffer.rindex(separator, @buffer.length - 1 - separator_length)
      break if index.nil? or index.zero?
      last_line = @buffer.slice!((index + separator_length)..-1)
      yield(last_line)
    end
  end
  yield(@buffer) unless @buffer.empty?
end