1 files changed, 40 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/num2bool.rb b/lib/puppet/parser/functions/num2bool.rb
new file mode 100644
index 0000000..874db22
--- /dev/null
+++ b/lib/puppet/parser/functions/num2bool.rb
@@ -0,0 +1,40 @@
+#
+# num2bool.rb
+#
+
+# TODO(Krzysztof Wilczynski): We probably need to approach numeric values differently ...
+
+module Puppet::Parser::Functions
+  newfunction(:num2bool, :type => :rvalue, :doc => <<-EOS
+This function converts a number into a true boolean. Zero becomes false. Numbers
+higher then 0 become true.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "num2bool(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    number = arguments[0]
+
+    # Only numbers allowed ...
+    unless number.match(/^\-?\d+$/)
+      raise(Puppet::ParseError, 'num2bool(): Requires integer to work with')
+    end
+
+    result = case number
+      when /^0$/
+        false
+      when /^\-?\d+$/
+        # Numbers in Puppet are often string-encoded which is troublesome ...
+        number = number.to_i
+        # We yield true for any positive number and false otherwise ...
+        number > 0 ? true : false
+      else
+        raise(Puppet::ParseError, 'num2bool(): Unknown numeric format given')
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :