Extract out FindMatch

csharp/BrainmessShort/Main.cs

@@ -59,42 +59,37 @@ public static void Run(string program)

       private static int JumpForward(string program, int pc)
       {
           int nestLevel = 1;
           while (nestLevel > 0)
           {
               char instruction = program[pc];
               if (instruction == '[')
               {
                   nestLevel++;
               }
               else if (instruction == ']')
               {
                   nestLevel--;
               }
               pc++;
           }
           return pc;
           const int increment = 1;
           return FindMatch(program, pc - 1, increment) + 1;
       }

       private static int JumpBackward(string program, int pc)
       {
           pc -= 2;
           const int increment = -1;
           return FindMatch(program, pc - 1, increment);
       }

       /// <summary>
       /// Finds the match for the bracket pointed to by
       /// pc in the program. Increment tells the algorithm
       /// which way to search.
       /// </summary>
       /// <param name="program"></param>
       /// <param name="pc"></param>
       /// <param name="increment"></param>
       /// <returns></returns>
       private static int FindMatch(string program, int pc, int increment)
       {
           int nestLevel = 1;
           pc += increment;
           while (nestLevel > 0)
           {
               char instruction = program[pc];
               if (instruction == '[')
               {
                   nestLevel--;
               }
               else if (instruction == ']')
               {
                   nestLevel++;
               }
               pc--;
               if (instruction == '[') nestLevel += increment;
               else if (instruction == ']') nestLevel -= increment;
               pc += increment;
           }
           pc++;
           return pc;
           return pc - increment;
       }
   }
}