class MultiGzReader

Public Class Methods

new(file_name) click to toggle source

# File lib/scbi_multi_gz_reader/multi_gz_reader.rb, line 5
def initialize(file_name)
        @file_name=file_name

        @file = File.open(@file_name)
        @io = Zlib::GzipReader.new @file
end

Public Instance Methods

close() click to toggle source

# File lib/scbi_multi_gz_reader/multi_gz_reader.rb, line 52
def close
        #@io.finish
        @file.close
end

eof() click to toggle source

# File lib/scbi_multi_gz_reader/multi_gz_reader.rb, line 48
def eof
        eof?
end

eof?() click to toggle source

# File lib/scbi_multi_gz_reader/multi_gz_reader.rb, line 43
def eof?
        #nothing more to read
        @io.unused.nil? && (@io.closed? || @io.eof?) && (@file.closed? || @file.eof?)
end

readline() click to toggle source

# File lib/scbi_multi_gz_reader/multi_gz_reader.rb, line 12
def readline

        res=nil

        begin
                res=@io.readline
        rescue EOFError => e

                #reached END, check if there is more data to read
                unused = @io.unused

                @io.finish

                # there is something left to read, open another stream
                if !unused.nil?
                        #puts "FIN1, fpos: #{@file.pos}, unused: #{unused.length}, io_eof: #{@io.eof}, eof: #{@file.eof}"
                
                        @file.pos -= unused.length
                        @io = Zlib::GzipReader.new @file
                        #repeat the read so there is no eof error
                        res=readline

                else
                        #no more data to read, return nil
                        res=nil
                end
        end

        return res
end

rewind() click to toggle source

# File lib/scbi_multi_gz_reader/multi_gz_reader.rb, line 57
def rewind
        close
        @file = File.open(@file_name)
        @io = Zlib::GzipReader.new @file
end