lib/anybase.rb in anybase-0.0.12 vs lib/anybase.rb in anybase-0.0.13

@@ -16,22 +16,35 @@
     @char_map = Hash.new{|h,k| raise UnrecognizedCharacterError.new("the character `#{k.chr}' is not included in #{@chars}")}
     @num_map = {}
     if ignore_case?
       @chars.downcase!
     end
+    regexp_str = '['
     @chars.split('').each_with_index do |c, i|
+      regexp_str << Regexp.quote(c)
       add_mapping(c, i)
       @num_map[i] = c
       if @synonyms && @synonyms[c]
         @synonyms[c].split('').each { |sc| 
+          regexp_str << Regexp.quote(sc)
           @synonyms_tr[1] << c
           @synonyms_tr[0] << sc
         }
       end
     end
+    regexp_str << ']+'
+    @regexp = @ignore_case ? Regexp.new(regexp_str, Regexp::IGNORECASE) : Regexp.new(regexp_str)
   end
 
+  def match(str)
+    if match = @regexp.match(str)
+      match.begin(0) == 0 ? match[0] : nil
+    else
+      nil
+    end
+  end
+
   def ignore_case?
     @ignore_case
   end
   
   def size(digits)
@@ -98,7 +111,6 @@
   Hex          = Anybase.new('0123456789abcdef', :ignore_case => true)
   Base62       = Anybase.new('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789')
   Base64       = Anybase.new('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/')
   Base64ForURL = Anybase.new('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_')
   Base73ForURL = Anybase.new('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789$-_.+!*\'(),')
-
 end