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module Puppet::Parser::Functions
newfunction(:to_bytes, :type => :rvalue, :doc => <<-EOS
Converts the argument into bytes, for example 4 kB becomes 4096.
Takes a single string value as an argument.
EOS
) do |arguments|
raise(Puppet::ParseError, "to_bytes(): Wrong number of arguments " +
"given (#{arguments.size} for 1)") if arguments.size != 1
arg = arguments[0]
return arg if arg.is_a? Numeric
value,prefix = */([0-9.e+-]*)\s*([^bB]?)/.match(arg)[1,2]
value = value.to_f
case prefix
when '' then return value.to_i
when 'k' then return (value*(1<<10)).to_i
when 'M' then return (value*(1<<20)).to_i
when 'G' then return (value*(1<<30)).to_i
when 'T' then return (value*(1<<40)).to_i
when 'E' then return (value*(1<<50)).to_i
else raise Puppet::ParseError, "to_bytes(): Unknown prefix #{prefix}"
end
end
end
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