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-rw-r--r--lib/puppet/parser/functions/abs.rb36
1 files changed, 36 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/abs.rb b/lib/puppet/parser/functions/abs.rb
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+++ b/lib/puppet/parser/functions/abs.rb
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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 :