MATLAB: Is there any other way to realize Simulink Block of “Tapped Delay” function

Question

 I just want to realize some function ,store a series data into a array,just like this below: 
         double x;
         double y[200]; 
          int i=0; 
          step_interrupt(void) 
          { 
             y[i]=x; 
             i++; 
             if(i==200)
             i=0; 
          } 
So, I just realize it by Block of "Tapped Delay" in Discrete, like this <<http://xjtudownload.googlecode.com/files/1.jpg>>,but when I generated the code,it's so inefficiency,just like this:
     32   void test_step(void)
     33   {
     34     int_T i;
     35   
     36     /* S-Function (sfix_udelay): '<Root>/Tapped Delay' */
     37     memcpy(&y[0], &test_DWork.TappedDelay_X[0], 200U * sizeof(real_T));
     38   
     39     /* Update for S-Function (sfix_udelay): '<Root>/Tapped Delay' incorporates:
     40      *  Update for Inport: '<Root>/In1'
     41      */
     42     for (i = 0; i < 199; i++) {
     43       test_DWork.TappedDelay_X[i] = test_DWork.TappedDelay_X[i + 1];
     44     }
     45   
     46     test_DWork.TappedDelay_X[199] = x;
     47   
     48     /* End of Update for S-Function (sfix_udelay): '<Root>/Tapped Delay' */
     49   }

I think some Block like "Delay" in Discrete Library have the Circular buffer function,except "Tapped Delay" Block. how can I realize it ?

Answer 1

thank Ryan, you have encouraged me. I have solved it today by using the Delay Block.Connect the input to a Delay Block with Terminator Block instead "Tapped Delay" Block.