#include <stdio.h>
#include "hash.h"

#define BUFSIZE 100

char buf [BUFSIZE];
int bufp = 0;

int getch(void) {
   return (bufp > 0) ? buf[--bufp] : getchar();
}

void ungetch(int c) {
   if (bufp >= BUFSIZE) {
      printf("ungetch: too many characters\n");
   }
   else {
      buf[bufp++] = c;
  }
}