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#
# clamp.rb
#
module Puppet::Parser::Functions
newfunction(:clamp, :type => :rvalue, :arity => -2, :doc => <<-EOS
Clamps value to a range.
EOS
) do |args|
args.flatten!
raise(Puppet::ParseError, 'clamp(): Wrong number of arguments, ' +
'need three to clamp') if args.size != 3
# check values out
args.each do |value|
case [value.class]
when [String]
raise(Puppet::ParseError, "clamp(): Required explicit numeric (#{value}:String)") unless value =~ /^\d+$/
when [Hash]
raise(Puppet::ParseError, "clamp(): The Hash type is not allowed (#{value})")
end
end
# convert to numeric each element
# then sort them and get a middle value
args.map{ |n| n.to_i }.sort[1]
end
end
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