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/utils/patterns.php | 67 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 include/utf8/utils/patterns.php

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

diff --git a/include/utf8/utils/patterns.php b/include/utf8/utils/patterns.php
new file mode 100644
index 0000000..5a85a4f
--- /dev/null
+++ b/include/utf8/utils/patterns.php
@@ -0,0 +1,67 @@
+<?php
+
+/**
+* PCRE Regular expressions for UTF-8. Note this file is not actually used by
+* the rest of the library but these regular expressions can be useful to have
+* available.
+* @version $Id: patterns.php,v 1.1 2006/02/25 14:20:02 harryf Exp $
+* @see http://www.w3.org/International/questions/qa-forms-utf-8
+* @package utf8
+* @subpackage patterns
+*/
+
+/**
+* PCRE Pattern to check a UTF-8 string is valid
+* Comes from W3 FAQ: Multilingual Forms
+* Note: modified to include full ASCII range including control chars
+* @see http://www.w3.org/International/questions/qa-forms-utf-8
+* @package utf8
+* @subpackage patterns
+*/
+$UTF8_VALID = '^('.
+	'[\x00-\x7F]'.                          # ASCII (including control chars)
+	'|[\xC2-\xDF][\x80-\xBF]'.              # Non-overlong 2-byte
+	'|\xE0[\xA0-\xBF][\x80-\xBF]'.          # Excluding overlongs
+	'|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}'.   # Straight 3-byte
+	'|\xED[\x80-\x9F][\x80-\xBF]'.          # Excluding surrogates
+	'|\xF0[\x90-\xBF][\x80-\xBF]{2}'.       # Planes 1-3
+	'|[\xF1-\xF3][\x80-\xBF]{3}'.           # Planes 4-15
+	'|\xF4[\x80-\x8F][\x80-\xBF]{2}'.       # Plane 16
+	')*$';
+
+/**
+* PCRE Pattern to match single UTF-8 characters
+* Comes from W3 FAQ: Multilingual Forms
+* Note: modified to include full ASCII range including control chars
+* @see http://www.w3.org/International/questions/qa-forms-utf-8
+* @package utf8
+* @subpackage patterns
+*/
+$UTF8_MATCH =
+	'([\x00-\x7F])'.                          # ASCII (including control chars)
+	'|([\xC2-\xDF][\x80-\xBF])'.              # Non-overlong 2-byte
+	'|(\xE0[\xA0-\xBF][\x80-\xBF])'.          # Excluding overlongs
+	'|([\xE1-\xEC\xEE\xEF][\x80-\xBF]{2})'.   # Straight 3-byte
+	'|(\xED[\x80-\x9F][\x80-\xBF])'.          # Excluding surrogates
+	'|(\xF0[\x90-\xBF][\x80-\xBF]{2})'.       # Planes 1-3
+	'|([\xF1-\xF3][\x80-\xBF]{3})'.           # Planes 4-15
+	'|(\xF4[\x80-\x8F][\x80-\xBF]{2})';       # Plane 16
+
+/**
+* PCRE Pattern to locate bad bytes in a UTF-8 string
+* Comes from W3 FAQ: Multilingual Forms
+* Note: modified to include full ASCII range including control chars
+* @see http://www.w3.org/International/questions/qa-forms-utf-8
+* @package utf8
+* @subpackage patterns
+*/
+$UTF8_BAD =
+	'([\x00-\x7F]'.                          # ASCII (including control chars)
+	'|[\xC2-\xDF][\x80-\xBF]'.               # Non-overlong 2-byte
+	'|\xE0[\xA0-\xBF][\x80-\xBF]'.           # Excluding overlongs
+	'|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}'.    # Straight 3-byte
+	'|\xED[\x80-\x9F][\x80-\xBF]'.           # Excluding surrogates
+	'|\xF0[\x90-\xBF][\x80-\xBF]{2}'.        # Planes 1-3
+	'|[\xF1-\xF3][\x80-\xBF]{3}'.            # Planes 4-15
+	'|\xF4[\x80-\x8F][\x80-\xBF]{2}'.        # Plane 16
+	'|(.{1}))';                              # Invalid byte
-- 
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