package org.bukkit.craftbukkit.util;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

public class VarInt {
    public static long read(DataInputStream stream) throws IOException {
        long value = 0;
        byte b;
        while((b = stream.readByte()) >= 0) {
            value = (value << 8) + b;
        }
        return  (value << 8) + b + 128;
    }

    public static void write(DataOutputStream stream, long l) throws IOException {
        int count = 64 - Long.numberOfLeadingZeros(l);
        count -= count % 7;
        for (int i = count; i > 0; i -=7) {
            stream.writeByte((int) ((l >>> i) & 0x3F));
        }
        stream.write((int) ((l & 0x3F) - 128));
    }
}