<?php

/*

 This file should only ever be loaded on PHP 7+

 */

if (PHP_VERSION_ID < 70000) {

    return;

}

spl_autoload_register(function ($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;

});