#
# round.rb
#

module Puppet::Parser::Functions
  newfunction(:round, :type => :rvalue, :doc => <<-EOS
  Rounds a number to the nearest integer

  *Examples:*

  round(2.9)

  returns: 3

  round(2.4)

  returns: 2

  EOS
  ) do |args|

    raise Puppet::ParseError, "round(): Wrong number of arguments given #{args.size} for 1" if args.size != 1
    raise Puppet::ParseError, "round(): Expected a Numeric, got #{args[0].class}" unless args[0].is_a? Numeric

    value = args[0]

    if value >= 0
      Integer(value + 0.5)
    else
      Integer(value - 0.5)
    end
  end
end