32 lines
1.1 KiB
Ruby
32 lines
1.1 KiB
Ruby
module Puppet::Parser::Functions
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newfunction(:to_bytes, :type => :rvalue, :doc => <<-EOS
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Converts the argument into bytes, for example 4 kB becomes 4096.
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Takes a single string value as an argument.
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These conversions reflect a layperson's understanding of
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1 MB = 1024 KB, when in fact 1 MB = 1000 KB, and 1 MiB = 1024 KiB.
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EOS
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) do |arguments|
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raise(Puppet::ParseError, "to_bytes(): Wrong number of arguments " +
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"given (#{arguments.size} for 1)") if arguments.size != 1
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arg = arguments[0]
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return arg if arg.is_a? Numeric
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value,prefix = */([0-9.e+-]*)\s*([^bB]?)/.match(arg)[1,2]
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value = value.to_f
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case prefix
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when '' then return value.to_i
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when 'k' then return (value*(1<<10)).to_i
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when 'M' then return (value*(1<<20)).to_i
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when 'G' then return (value*(1<<30)).to_i
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when 'T' then return (value*(1<<40)).to_i
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when 'P' then return (value*(1<<50)).to_i
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when 'E' then return (value*(1<<60)).to_i
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else raise Puppet::ParseError, "to_bytes(): Unknown prefix #{prefix}"
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end
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end
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end
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