lib/fugit/nat.rb in fugit-1.11.0 vs lib/fugit/nat.rb in fugit-1.11.1

@@ -5,20 +5,32 @@
   # A natural language set of parsers for fugit.
   # Focuses on cron expressions. The rest is better left to Chronic and friends.
   #
   module Nat
 
+    MAX_INPUT_LENGTH = 256
+
     class << self
 
       def parse(s, opts={})
 
         return s if s.is_a?(Fugit::Cron) || s.is_a?(Fugit::Duration)
 
         return nil unless s.is_a?(String)
 
         s = s.strip
 
+        if s.length > MAX_INPUT_LENGTH
+
+          fail ArgumentError.new(
+            "input too long for a nat string, " +
+            "#{s.length} > #{MAX_INPUT_LENGTH}"
+          ) if opts[:do_parse]
+
+          return nil
+        end
+
 #p s; Raabro.pp(Parser.parse(s, debug: 3), colours: true)
 #(p s; Raabro.pp(Parser.parse(s, debug: 1), colours: true)) rescue nil
 
         if slots = Parser.parse(s)
           slots.to_crons(opts.merge(_s: s))
@@ -27,10 +39,10 @@
         end
       end
 
       def do_parse(s, opts={})
 
-        parse(s, opts) ||
+        parse(s, opts.merge(do_parse: true)) ||
         fail(ArgumentError.new("could not parse a nat #{s.inspect}"))
       end
     end
 
     module Parser include Raabro