add error constants

git-svn-id: http://svn.php.net/repository/pear/packages/Text_LanguageDetect/trunk@322322 c90b9560-bf6c-de11-be94-00142212c4b1

Author: cweiske

Text/LanguageDetect/Exception.php

@@ -1,2 +1,57 @@
 <?php
-class Text_LanguageDetect_Exception extends Exception {}
+class Text_LanguageDetect_Exception extends Exception
+{
+    /**
+     * Database file could not be found
+     */
+    const DB_NOT_FOUND = 10;
+
+    /**
+     * Database file found, but not readable
+     */
+    const DB_NOT_READABLE = 11;
+
+    /**
+     * Database file is empty
+     */
+    const DB_EMPTY = 12;
+
+    /**
+     * Database contents is not a PHP array
+     */
+    const DB_NOT_ARRAY = 13;
+
+    /**
+     * Magic quotes are activated
+     */
+    const MAGIC_QUOTES = 14;
+
+
+    /**
+     * Parameter of invalid type passed to method
+     */
+    const PARAM_TYPE = 20;
+
+    /**
+     * Character in parameter is invalid
+     */
+    const INVALID_CHAR = 21;
+
+
+    /**
+     * Language is not in the database
+     */
+    const UNKNOWN_LANGUAGE = 30;
+
+
+    /**
+     * Error during block detection
+     */
+    const BLOCK_DETECTION = 40;
+
+
+    /**
+     * Error while clustering languages
+     */
+    const NO_HIGHEST_KEY = 50;
+}