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-rw-r--r--lib/puppet/parser/functions/to_bytes.rb28
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/to_bytes.rb b/lib/puppet/parser/functions/to_bytes.rb
new file mode 100644
index 0000000..8ff73d1
--- /dev/null
+++ b/lib/puppet/parser/functions/to_bytes.rb
@@ -0,0 +1,28 @@
+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