Class: SpeedFormat

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

Constant Summary collapse

@@units = 
[nil, :k, :M, :G, :T, :P, :E]

Class Method Summary collapse

Class Method Details

.format(bps, unit = nil, bytes = nil) ⇒ Object

Get bps in unit and format it, if bytes is provided, the output is in bytes instead of bits



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# File 'lib/speed_format.rb', line 20

def self.format(bps, unit=nil, bytes=nil)
    if not @@units.include?(unit)
      raise ArgumentError, "Not a valid prefix"
    end
    bps = BigDecimal(bps.to_s).abs
    if bytes == :bytes
      bps /= 8
    end
    index = @@units.index(unit)
    d = bps % 1 != 0.0 ? 1 : -1 # If there's right side digits, should move the comma right, otherwise left
    if bps != 0.0
      if d == 1 # Move to the right (non-integers)
        while (bps % 1 != 0.0) and (index-d >= 0) and (index-d < @@units.length)
            bps *= 10.0**(d*3)
            index -= d
        end
      else # Move to the left
        next_v = (bps*10.0**(d*3)) # Calculating the next
        while (next_v % 1 == 0.0) and (index-d >= 0) and (index-d < @@units.length)
            bps *= 10.0**(d*3)
            index -= d
            next_v = bps*10.0**(d*3)
        end
      end
    else
      index = 0
    end
    bps = bps.to_s("F")
    return bps[-2,2] == ".0" ? bps[0..-3].to_i : Float(bps), @@units[index]
end

.format_string(*args) ⇒ Object 



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# File 'lib/speed_format.rb', line 51

def self.format_string(*args)
  out = self.format(*args)
  out[0] = out[0] % 1 == 0.0 ? out[0].to_i : out[0]
  suffix = args.include?(:bytes) ? "B/s" : "bit/s"
  out.join(" ") + suffix
end

.units ⇒ Object 



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# File 'lib/speed_format.rb', line 58

def self.units
  @@units
end