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-rw-r--r--calendar/lib/SabreDAV/lib/OldSabre/DAV/PartialUpdate/IPatchSupport.php48
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diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/PartialUpdate/IPatchSupport.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/PartialUpdate/IPatchSupport.php
new file mode 100644
index 0000000..e6e0989
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+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/PartialUpdate/IPatchSupport.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace OldSabre\DAV\PartialUpdate;
+
+use OldSabre\DAV;
+
+/**
+ * This interface provides a way to modify only part of a target resource
+ * It may be used to update a file chunk, upload big a file into smaller
+ * chunks or resume an upload
+ *
+ * @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
+ * @author Jean-Tiare LE BIGOT (http://www.jtlebi.fr/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface IPatchSupport extends DAV\IFile {
+
+ /**
+ * Updates the file based on a range specification.
+ *
+ * The first argument is the data, which is either a readable stream
+ * resource or a string.
+ *
+ * The second argument is the type of update we're doing.
+ * This is either:
+ * * 1. append
+ * * 2. update based on a start byte
+ * * 3. update based on an end byte
+ *;
+ * The third argument is the start or end byte.
+ *
+ * After a successful put operation, you may choose to return an ETag. The
+ * etag must always be surrounded by double-quotes. These quotes must
+ * appear in the actual string you're returning.
+ *
+ * Clients may use the ETag from a PUT request to later on make sure that
+ * when they update the file, the contents haven't changed in the mean
+ * time.
+ *
+ * @param resource|string $data
+ * @param int $rangeType
+ * @param int $offset
+ * @return string|null
+ */
+ function patch($data, $rangeType, $offset = null);
+
+}
+

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