Class: DatacenterLookup::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/datacenter_lookup/parser.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/datacenter_lookup/parser.rb', line 6

def initialize
  @starts = Array.new
  @ends = Array.new
  @urls = Array.new
  File.open(DatacenterLookup::DefaultDatacentersPath, "r").readlines.map do |line|
    add(*CSV.parse_line(line))
  end
end

Instance Method Details

#add(start, stop, name, url = nil) ⇒ Object 



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# File 'lib/datacenter_lookup/parser.rb', line 15

def add(start, stop, name, url=nil)
  @starts << IPAddr.new(start).to_i
  @ends << IPAddr.new(stop).to_i
  @urls << url
end

#find(ipstring) ⇒ Object 



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# File 'lib/datacenter_lookup/parser.rb', line 25

def find(ipstring)
  ip = IPAddr.new(ipstring).to_i
  high = length
  low = 0
  while high >= low do
    probe = ((high+low)/2).floor.to_i
    if @starts[probe] > ip
      high = probe - 1
    elsif @ends[probe] < ip
      low = probe + 1
    else
      return @urls[probe]
    end
  end
  return nil
end

#length ⇒ Object 



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# File 'lib/datacenter_lookup/parser.rb', line 21

def length
  @starts.length
end