<?php

if (!is_callable('sodiumCompatAutoloader')) {

    /**

     * Sodium_Compat autoloader.

     *

     * @param string $class Class name to be autoloaded.

     *

     * @return bool         Stop autoloading?

     */

    function sodiumCompatAutoloader($class)

    {

        $namespace = 'ParagonIE_Sodium_';

        // Does the class use the namespace prefix?

        $len = strlen($namespace);

        if (strncmp($namespace, $class, $len) !== 0) {

            // no, move to the next registered autoloader

            return false;

        }

        // Get the relative class name

        $relative_class = substr($class, $len);

        // Replace the namespace prefix with the base directory, replace namespace

        // separators with directory separators in the relative class name, append

        // with .php

        $file = dirname(__FILE__) . '/src/' . str_replace('_', '/', $relative_class) . '.php';

        // if the file exists, require it

        if (file_exists($file)) {

            require_once $file;

            return true;

        }

        return false;

    }

    // Now that we have an autoloader, let's register it!

    spl_autoload_register('sodiumCompatAutoloader');

}

require_once dirname(__FILE__) . '/src/SodiumException.php';

if (PHP_VERSION_ID >= 50300) {

    // Namespaces didn't exist before 5.3.0, so don't even try to use this

    // unless PHP >= 5.3.0

    require_once dirname(__FILE__) . '/lib/namespaced.php';

    require_once dirname(__FILE__) . '/lib/sodium_compat.php';

}

if (PHP_VERSION_ID < 70200 || !extension_loaded('sodium')) {

    require_once dirname(__FILE__) . '/lib/php72compat.php';

}