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diff --git a/drivers/scan_results.hpp b/drivers/scan_results.hpp
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+// Copyright 2011 The Kyua Authors.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+//   notice, this list of conditions and the following disclaimer.
+// * 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.
+// * Neither the name of Google Inc. nor the names of its contributors
+//   may be used to endorse or promote products derived from this software
+//   without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
+// OWNER 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.
+
+/// \file drivers/scan_results.hpp
+/// Driver to scan the contents of a results file.
+///
+/// This driver module implements the logic to scan the contents of a results
+/// file and to notify the presentation layer as soon as data becomes
+/// available.  This is to prevent reading all the data from the file at once,
+/// which could take too much memory.
+
+#if !defined(DRIVERS_SCAN_RESULTS_HPP)
+#define DRIVERS_SCAN_RESULTS_HPP
+
+extern "C" {
+#include <stdint.h>
+}
+
+#include <set>
+
+#include "engine/filters.hpp"
+#include "model/context_fwd.hpp"
+#include "store/read_transaction_fwd.hpp"
+#include "utils/datetime_fwd.hpp"
+#include "utils/fs/path_fwd.hpp"
+
+namespace drivers {
+namespace scan_results {
+
+
+/// Tuple containing the results of this driver.
+class result {
+public:
+    /// Filters that did not match any available test case.
+    ///
+    /// The presence of any filters here probably indicates a usage error.  If a
+    /// test filter does not match any test case, it is probably a typo.
+    std::set< engine::test_filter > unused_filters;
+
+    /// Initializer for the tuple's fields.
+    ///
+    /// \param unused_filters_ The filters that did not match any test case.
+    result(const std::set< engine::test_filter >& unused_filters_) :
+        unused_filters(unused_filters_)
+    {
+    }
+};
+
+
+/// Abstract definition of the hooks for this driver.
+class base_hooks {
+public:
+    virtual ~base_hooks(void) = 0;
+
+    virtual void begin(void);
+
+    /// Callback executed when the context is loaded.
+    ///
+    /// \param context The context loaded from the database.
+    virtual void got_context(const model::context& context) = 0;
+
+    /// Callback executed when a test results is found.
+    ///
+    /// \param iter Container for the test result's data.  Some of the data are
+    ///     lazily fetched, hence why we receive the object instead of the
+    ///     individual elements.
+    virtual void got_result(store::results_iterator& iter) = 0;
+
+    virtual void end(const result& r);
+};
+
+
+result drive(const utils::fs::path&, const std::set< engine::test_filter >&,
+             base_hooks&);
+
+
+}  // namespace scan_results
+}  // namespace drivers
+
+#endif  // !defined(DRIVERS_SCAN_RESULTS_HPP)