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diff --git a/unit/atf-src/tools/expand.hpp b/unit/atf-src/tools/expand.hpp
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+//
+// Automated Testing Framework (atf)
+//
+// Copyright (c) 2007 The NetBSD Foundation, Inc.
+// All rights reserved.
+//
+// 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.
+//
+// THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
+// CONTRIBUTORS ``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 FOUNDATION OR CONTRIBUTORS 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.
+//
+
+#if !defined(TOOLS_EXPAND_HPP)
+#define TOOLS_EXPAND_HPP
+
+#include <string>
+#include <vector>
+
+namespace tools {
+namespace expand {
+
+// ------------------------------------------------------------------------
+// Free functions.
+// ------------------------------------------------------------------------
+
+//!
+//! \brief Checks if the given string is a glob pattern.
+//!
+//! Returns true if the given string is a glob pattern; i.e. if it contains
+//! any character that will be expanded by expand_glob.
+//!
+bool is_glob(const std::string&);
+
+//!
+//! \brief Checks if a given string matches a glob pattern.
+//!
+//! Given a glob pattern and a string, checks whether the former matches
+//! the latter.  Returns a boolean indicating this condition.
+//!
+bool matches_glob(const std::string&, const std::string&);
+
+//!
+//! \brief Expands a glob pattern among multiple candidates.
+//!
+//! Given a glob pattern and a set of candidate strings, checks which of
+//! those strings match the glob pattern and returns them.
+//!
+template< class T >
+std::vector< std::string > expand_glob(const std::string& glob,
+                                       const T& candidates)
+{
+    std::vector< std::string > exps;
+
+    for (typename T::const_iterator iter = candidates.begin();
+         iter != candidates.end(); iter++)
+        if (matches_glob(glob, *iter))
+            exps.push_back(*iter);
+
+    return exps;
+}
+
+} // namespace expand
+} // namespace tools
+
+#endif // !defined(TOOLS_EXPAND_HPP)