--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/zip/libzip/lib/zip_source_supports.c	Wed Jun 01 17:36:52 2016 +0200
@@ -0,0 +1,68 @@
+/*
+  zip_source_supports.c -- check for supported functions
+  Copyright (C) 2014-2015 Dieter Baron and Thomas Klausner
+
+  This file is part of libzip, a library to manipulate ZIP archives.
+  The authors can be contacted at <libzip@nih.at>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+  1. Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+  2. Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in
+     the documentation and/or other materials provided with the
+     distribution.
+  3. The names of the authors may not be used to endorse or promote
+     products derived from this software without specific prior
+     written permission.
+ 
+  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
+  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include <stdarg.h>
+
+#include "zipint.h"
+
+
+zip_int64_t
+zip_source_supports(zip_source_t *src)
+{
+    return src->supports;
+}
+
+
+ZIP_EXTERN zip_int64_t
+zip_source_make_command_bitmap(zip_source_cmd_t cmd0, ...)
+{
+    zip_int64_t bitmap;
+    va_list ap;
+    
+    bitmap = ZIP_SOURCE_MAKE_COMMAND_BITMASK(cmd0);
+    
+    
+    
+    va_start(ap, cmd0);
+    for (;;) {
+        int cmd = va_arg(ap, int);
+        if (cmd < 0) {
+            break;
+        }
+        bitmap |= ZIP_SOURCE_MAKE_COMMAND_BITMASK(cmd);
+    }
+    va_end(ap);
+    
+    return bitmap;
+}