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#
# abs.rb
#
module Puppet::Parser::Functions
newfunction(:abs, :type => :rvalue, :doc => <<-EOS
Returns the absolute value of a number, for example -34.56 becomes
34.56. Takes a single integer and float value as an argument.
EOS
) do |arguments|
raise(Puppet::ParseError, "abs(): Wrong number of arguments " +
"given (#{arguments.size} for 1)") if arguments.size < 1
value = arguments[0]
# Numbers in Puppet are often string-encoded which is troublesome ...
if value.is_a?(String)
if value.match(/^-?(?:\d+)(?:\.\d+){1}$/)
value = value.to_f
elsif value.match(/^-?\d+$/)
value = value.to_i
else
raise(Puppet::ParseError, 'abs(): Requires float or ' +
'integer to work with')
end
end
# We have numeric value to handle ...
result = value.abs
return result
end
end
# vim: set ts=2 sw=2 et :
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