Class: Resolv::LOC::Coord

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

Overview

A Resolv::LOC::Coord

Constant Summary collapse

Regex = 
/^(\d+)\s(\d+)\s(\d+\.\d+)\s([NESW])$/

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(coordinates, orientation) ⇒ Coord

Returns a new instance of Coord.



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# File 'lib/resolv.rb', line 2715

def initialize(coordinates,orientation)
  unless coordinates.kind_of?(String)
    raise ArgumentError.new("Coord must be a 32bit unsigned integer in hex format: #{coordinates.inspect}")
  end
  unless orientation.kind_of?(String) && orientation[/^lon$|^lat$/]
    raise ArgumentError.new('Coord expects orientation to be a String argument of "lat" or "lon"')
  end
  @coordinates = coordinates
  @orientation = orientation
end

Instance Attribute Details

#coordinates ⇒ Object (readonly)

The raw coordinates



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# File 'lib/resolv.rb', line 2729

def coordinates
  @coordinates
end

#orientation ⇒ Object (readonly)

The orientation of the hemisphere as ‘lat’ or ‘lon’



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# File 'lib/resolv.rb', line 2733

def orientation
  @orientation
end

Class Method Details

.create(arg) ⇒ Object

Creates a new LOC::Coord from arg which may be:

LOC::Coord

returns arg.

String

arg must match the LOC::Coord::Regex constant



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# File 'lib/resolv.rb', line 2696

def self.create(arg)
  case arg
  when Coord
    return arg
  when String
    coordinates = ''
    if Regex =~ arg &&  $1<180
      hemi = ($4[/([NE])/,1]) || ($4[/([SW])/,1]) ? 1 : -1
      coordinates = [(($1.to_i*(36e5))+($2.to_i*(6e4))+($3.to_f*(1e3)))*hemi+(2**31)].pack("N")
      (orientation ||= '') << $4[[/NS/],1] ? 'lat' : 'lon'
    else
      raise ArgumentError.new("not a properly formed Coord string: " + arg)
    end
    return Coord.new(coordinates,orientation)
  else
    raise ArgumentError.new("cannot interpret as Coord: #{arg.inspect}")
  end
end

Instance Method Details

#==(other) ⇒ Object

:nodoc:



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# File 'lib/resolv.rb', line 2758

def ==(other) # :nodoc:
  return @coordinates == other.coordinates
end

#eql?(other) ⇒ Boolean

:nodoc:

Returns:

  • (Boolean) 


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# File 'lib/resolv.rb', line 2762

def eql?(other) # :nodoc:
  return self == other
end

#hash ⇒ Object

:nodoc:



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# File 'lib/resolv.rb', line 2766

def hash # :nodoc:
  return @coordinates.hash
end

#inspect ⇒ Object

:nodoc:



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# File 'lib/resolv.rb', line 2754

def inspect # :nodoc:
  return "#<#{self.class} #{self}>"
end

#to_s ⇒ Object

:nodoc:



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# File 'lib/resolv.rb', line 2735

def to_s # :nodoc:
    c = @coordinates.unpack("N").join.to_i
    val      = (c - (2**31)).abs
    fracsecs = (val % 1e3).to_i.to_s
    val      = val / 1e3
    secs     = (val % 60).to_i.to_s
    val      = val / 60
    mins     = (val % 60).to_i.to_s
    degs     = (val / 60).to_i.to_s
    posi = (c >= 2**31)
    case posi
    when true
      hemi = @orientation[/^lat$/] ? "N" : "E"
    else
      hemi = @orientation[/^lon$/] ? "W" : "S"
    end
    return degs << " " << mins << " " << secs << "." << fracsecs << " " << hemi
end