From a04a74fec4b5e13e8464f1f3c9071fa0b56a13eb Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Wed, 12 Sep 2012 09:59:10 +0200
Subject: Improvements in building criteria string for IMAP SEARCH

---
 program/include/rcube_shared.inc | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'program/include/rcube_shared.inc')

diff --git a/program/include/rcube_shared.inc b/program/include/rcube_shared.inc
index c15305c08..4577c6df5 100644
--- a/program/include/rcube_shared.inc
+++ b/program/include/rcube_shared.inc
@@ -254,6 +254,21 @@ function asciiwords($str, $css_id = false, $replace_with = '')
 }
 
 
+/**
+ * Check if a string contains only ascii characters
+ *
+ * @param string $str           String to check
+ * @param bool   $control_chars Includes control characters
+ *
+ * @return bool
+ */
+function is_ascii($str, $control_chars = true)
+{
+    $regexp = $control_chars ? '/[^\x00-\x7F]/' : '/[^\x20-\x7E]/';
+    return preg_match($regexp, $str) ? false : true;
+}
+
+
 /**
  * Remove single and double quotes from a given string
  *
-- 
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