Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

public class Main {
    /**
     * An array mapping legal base 64 characters [a-zA-Z0-9$_] to their associated
     * 6-bit values. The source indices will be given by 7-bit ASCII characters,
     * thus the array size needs to be 128 (actually 123 would suffice for the
     * given set of characters in use).
     */
    private static final byte[] base64Values = new byte[128];

    /**
     * Decode a base64 string into a long value.
     */
    public static long longFromBase64(String value) {
        int pos = 0;
        long longVal = base64Values[value.charAt(pos++)];
        int len = value.length();
        while (pos < len) {
            longVal <<= 6;
            longVal |= base64Values[value.charAt(pos++)];
        }
        return longVal;
    }
}