I don't know why I am doing.

listentry.cpp

/* -1 not found */
unsigned int findList(const unsigned int DATA_A, const unsigned int DATA_B){
  unsigned int prevEntry = NULL, curEntry = ListHead;

  while(curEntry != NULL) {
    if (ListArray[curEntry].DataH == DATA_A && ListArray[curEntry].DataL == DATA_B) {
      printf("FoundEntry = %d, PreEntry = %d\n", curEntry, prevEntry);
      return curEntry;
    }

    if((ListArray[curEntry].DataH << 16) + ListArray[curEntry].DataL > (DATA_A << 16) + DATA_B) {
      puts("not found");
      return -1;
    }

    preEntry = curEntry;
    curEntry = ListArray[curEntry].NextPtr;
  }

  puts("not found");
  return -1;
}