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-rw-r--r--libcommon/common/common.txx26
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diff --git a/libcommon/common/common.txx b/libcommon/common/common.txx
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+// file : libcommon/common/common.txx
+// author : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2005-2011 Code Synthesis Tools CC
+// license : GNU GPL v2; see accompanying LICENSE file
+
+// We have to use this helper function instead of just checking which
+// database is used because the DATABASE_* macro may not be defined
+// in a project that includes this header.
+//
+LIBCOMMON_EXPORT bool
+size_available ();
+
+template <typename T>
+std::size_t
+size (odb::result<T>& r)
+{
+ if (size_available ())
+ return r.size ();
+ else
+ {
+ std::size_t n (0);
+ for (typename odb::result<T>::iterator i (r.begin ()); i != r.end (); ++i)
+ n++;
+ return n;
+ }
+}