/* write_terminal(int32_tfd, const void*buf, int32_t nbytes)
  * DESCRIPTION: Should output a string to the terminal
  * INPUTS: file descriptor, buffer, and number of bytes read from buffer
  * OUTPUTS: Number of bytes written or -1 on fail
  */
 int32_t write_terminal(int32_t fd, const void * buf, int32_t nbytes){
   int32_t written=0; int32_t i=0;
   //create temp buffer of size of 1 byte
   uint8_t *temp_buf=(uint8_t *)buf;
   int count;

   // check if we previously have had 19 bytes (Starting 391 SHell\n)
   // also check if we have printed 1 instance of 391OS>
   if(prev_nbytes==LEN_PROMPT && prev_buf[0]=='S' && prev_buf[1]=='t' && _391OS_count==1){
     _391OS_count=0; // reset the flags
     return 0;
   }
   else{
     _391OS_count=1; // reset the flags
   }

   // if buff is NULL or nothing to be copied or less than 0 is requested copy, return
   if(buf==NULL || nbytes<0){
     return -1;
   }
  //cli();
  for(i=0; i<nbytes; i++){
    //print each character starting from index 0 to nbytes
    putc(temp_buf[i]);
    position(0,0,1);
    written++;
  }
   //sti();
   if(nbytes==written){
     // make sure to copy the right number of bytes to the prev_buf for checking
     // and not to overflow it
     if(nbytes<LEN_PROMPT){
       count=nbytes;
     }
     else{
       count=LEN_PROMPT;
     }
     // update the prev_buf to contain whatever was last entered
     for(i=0; i<count; i++){
       prev_buf[i]=temp_buf[i];
     }
     prev_nbytes=nbytes; // update prev_nbytes
     return nbytes;
   }
   else{
     prev_nbytes=-1;
     return -1;
   }
 }