package org.psjava.util;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.StringTokenizer;

public class FastScanner {

private StringTokenizer tokenizer;

public FastScanner(InputStream is) {

read(is, "\n\r\t ");

}

public FastScanner(InputStream is, String delimiters) {

read(is, delimiters);

}

private void read(InputStream is, String delimiters) {

try {

ByteArrayOutputStream bos = new ByteArrayOutputStream();

byte[] buf = new byte[1024];

while (true) {

int read = is.read(buf);

if (read == -1)

break;

bos.write(buf, 0, read);

}

tokenizer = new StringTokenizer(new String(bos.toByteArray()), delimiters);

} catch (IOException e) {

throw new RuntimeException(e);

}

}

public boolean hasNext() {

return tokenizer.hasMoreTokens();

}

public int nextInt() {

return Integer.parseInt(tokenizer.nextToken());

}

public long nextLong() {

return Long.parseLong(tokenizer.nextToken());

}

public double nextDouble() {

return Double.parseDouble(tokenizer.nextToken());

}

public String next() {

return tokenizer.nextToken();

}

}