X-Git-Url: https://scripts.mit.edu/gitweb/autoinstallsdev/mediawiki.git/blobdiff_plain/19e297c21b10b1b8a3acad5e73fc71dcb35db44a..6932310fd58ebef145fa01eb76edf7150284d8ea:/vendor/wikimedia/cdb/src/Reader.php

diff --git a/vendor/wikimedia/cdb/src/Reader.php b/vendor/wikimedia/cdb/src/Reader.php
new file mode 100644
index 00000000..b1aaa022
--- /dev/null
+++ b/vendor/wikimedia/cdb/src/Reader.php
@@ -0,0 +1,102 @@
+<?php
+
+namespace Cdb;
+
+/**
+ * Native CDB file reader and writer.
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * Read from a CDB file.
+ * Native and pure PHP implementations are provided.
+ * http://cr.yp.to/cdb.html
+ */
+abstract class Reader {
+	/**
+	 * The file handle
+	 */
+	protected $handle;
+
+	/**
+	 * Open a file and return a subclass instance
+	 *
+	 * @param string $fileName
+	 *
+	 * @return Reader
+	 */
+	public static function open( $fileName ) {
+		return self::haveExtension() ?
+			new Reader\DBA( $fileName ) :
+			new Reader\PHP( $fileName );
+	}
+
+	/**
+	 * Returns true if the native extension is available
+	 *
+	 * @return bool
+	 */
+	public static function haveExtension() {
+		if ( !function_exists( 'dba_handlers' ) ) {
+			return false;
+		}
+		$handlers = dba_handlers();
+		if ( !in_array( 'cdb', $handlers ) || !in_array( 'cdb_make', $handlers ) ) {
+			return false;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Create the object and open the file
+	 *
+	 * @param string $fileName
+	 */
+	abstract public function __construct( $fileName );
+
+	/**
+	 * Close the file. Optional, you can just let the variable go out of scope.
+	 */
+	abstract public function close();
+
+	/**
+	 * Get a value with a given key. Only string values are supported.
+	 *
+	 * @param string $key
+	 */
+	abstract public function get( $key );
+
+	/**
+	 * Check whether key exists
+	 *
+	 * @param string $key
+	 */
+	abstract public function exists( $key );
+
+	/**
+	 * Fetch first key
+	 */
+	abstract public function firstkey();
+
+	/**
+	 * Fetch next key
+	 */
+	abstract public function nextkey();
+}