X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=data%2Frbot%2Fplugins%2Fmath.rb;h=a6baa7090bb014b737776abbbd85d49906fb41b0;hb=38ce7c2531807e9575a207d9c0c7594778946c89;hp=9dd35c985fabdb2f53be5e942b1a4644aab6a4f5;hpb=282909e0ef97ab3045254920dcee5eab2be25505;p=user%2Fhenk%2Fcode%2Fruby%2Frbot.git

diff --git a/data/rbot/plugins/math.rb b/data/rbot/plugins/math.rb
index 9dd35c98..a6baa709 100644
--- a/data/rbot/plugins/math.rb
+++ b/data/rbot/plugins/math.rb
@@ -39,12 +39,17 @@ class MathPlugin < Plugin
       expr.gsub!(/\b#{k}\b/, v)
     }
 
+    # ruby doesn't like floating-point values without a 0
+    # in front of them, so find any non-digit followed by
+    # a .<digits> and insert a 0 before the .
+    expr.gsub!(/(\D|^)(\.\d+)/,'\10\2')
+
     while expr =~ /(exp ([\w\d]+))/
       exp = $1
       val = Math.exp($2).to_s
       expr.gsub!(/#{Regexp.escape exp}/, "+#{val}")
     end
-    
+
     while expr =~ /^\s*(dec2hex\s*(\d+))\s*\?*/
       exp = $1
       val = sprintf("%x", $2)
@@ -56,13 +61,13 @@ class MathPlugin < Plugin
     while expr =~ /(log\s*((\d+\.?\d*)|\d*\.?\d+))\s*/
       exp = $1
       res = $2
-      
+
       if res == 0
         val = "Infinity"
       else
         val = Math.log(res).to_s
       end
-      
+
       expr.gsub!(/#{Regexp.escape exp}/, "+#{val}")
     end