Add src files for CoreLibs composer all package

src/Language/Core/CachedFileReader.php

@@ -0,0 +1,58 @@
+<?php
+
+/*
+	Copyright (c) 2003, 2005, 2006, 2009 Danilo Segan <danilo@kvota.net>.
+
+	This file is part of PHP-gettext.
+
+	PHP-gettext is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	PHP-gettext is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with PHP-gettext; if not, write to the Free Software
+	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+declare(strict_types=1);
+
+namespace CoreLibs\Language\Core;
+
+// Preloads entire file in memory first, then creates a StringReader
+// over it (it assumes knowledge of StringReader internals)
+class CachedFileReader extends \CoreLibs\Language\Core\StringReader
+{
+	/** @var int */
+	public $error = 0;
+	/** @var string */
+	public $fd_str = '';
+
+	/**
+	 * Undocumented function
+	 *
+	 * @param string $filename
+	 */
+	public function __construct(string $filename)
+	{
+		parent::__construct();
+		if (file_exists($filename)) {
+			$fd = fopen($filename, 'rb');
+			if (!is_resource($fd)) {
+				$this->error = 3; // Cannot read file, probably permissions
+			} else {
+				$this->fd_str = fread($fd, filesize($filename) ?: 0) ?: '';
+				fclose($fd);
+			}
+		} else {
+			$this->error = 2; // File doesn't exist
+		}
+	}
+}
+
+// __END__