From ada3beb0a6c649bd9bfc6a87b2fe69ee8ae563f7 Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sat, 1 Feb 2020 08:57:06 +0100
Subject: initial checkin

---
 include/utf8/utf8.php | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 include/utf8/utf8.php

(limited to 'include/utf8/utf8.php')

diff --git a/include/utf8/utf8.php b/include/utf8/utf8.php
new file mode 100644
index 0000000..661b2d7
--- /dev/null
+++ b/include/utf8/utf8.php
@@ -0,0 +1,72 @@
+<?php
+
+/**
+* This is the dynamic loader for the library. It checks whether you have
+* the mbstring extension available and includes relevant files
+* on that basis, falling back to the native (as in written in PHP) version
+* if mbstring is unavailabe.
+*
+* It's probably easiest to use this, if you don't want to understand
+* the dependencies involved, in conjunction with PHP versions etc. At
+* the same time, you might get better performance by managing loading
+* yourself. The smartest way to do this, bearing in mind performance,
+* is probably to "load on demand" - i.e. just before you use these
+* functions in your code, load the version you need.
+*
+* It makes sure the the following functions are available;
+* utf8_strlen, utf8_strpos, utf8_strrpos, utf8_substr,
+* utf8_strtolower, utf8_strtoupper
+* Other functions in the ./native directory depend on these
+* six functions being available
+* @package utf8
+*/
+
+// Check whether PCRE has been compiled with UTF-8 support
+$UTF8_ar = array();
+if (preg_match('/^.{1}$/u', "ñ", $UTF8_ar) != 1)
+	trigger_error('PCRE is not compiled with UTF-8 support', E_USER_ERROR);
+
+unset($UTF8_ar);
+
+// Put the current directory in this constant
+if (!defined('UTF8'))
+	define('UTF8', dirname(__FILE__));
+
+if (extension_loaded('mbstring') && !defined('UTF8_USE_MBSTRING') && !defined('UTF8_USE_NATIVE'))
+	define('UTF8_USE_MBSTRING', true);
+else if (!defined('UTF8_USE_NATIVE'))
+	define('UTF8_USE_NATIVE', true);
+
+// utf8_strpos() and utf8_strrpos() need utf8_bad_strip() to strip invalid
+// characters. Mbstring doesn't do this while the Native implementation does.
+require UTF8.'/utils/bad.php';
+
+if (defined('UTF8_USE_MBSTRING'))
+{
+	/**
+	* If string overloading is active, it will break many of the
+	* native implementations. mbstring.func_overload must be set
+	* to 0, 1 or 4 in php.ini (string overloading disabled).
+	* Also need to check we have the correct internal mbstring
+	* encoding
+	*/
+	if (ini_get('mbstring.func_overload') & MB_OVERLOAD_STRING)
+		trigger_error('String functions are overloaded by mbstring', E_USER_ERROR);
+
+	mb_language('uni');
+	mb_internal_encoding('UTF-8');
+
+	if (!defined('UTF8_CORE'))
+		require UTF8.'/mbstring/core.php';
+}
+elseif (defined('UTF8_USE_NATIVE'))
+{
+	if (!defined('UTF8_CORE'))
+	{
+		require UTF8.'/utils/unicode.php';
+		require UTF8.'/native/core.php';
+	}
+}
+
+// Load the native implementation of utf8_trim
+require UTF8.'/trim.php';
-- 
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