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+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2005, 2006 Ciaran McCreesh <ciaranm@ciaranm.org>
+ *
+ * This file is part of the Paludis package manager. Paludis is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU General
+ * Public License version 2, as published by the Free Software Foundation.
+ *
+ * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef PALUDIS_GUARD_PALUDIS_STRINGIFY_HH
+#define PALUDIS_GUARD_PALUDIS_STRINGIFY_HH 1
+
+#include <sstream>
+#include <string>
+#include <paludis/util/attributes.hh>
+
+/** \file
+ * Stringify functions.
+ *
+ * \ingroup grpstringify
+ */
+
+namespace paludis
+{
+ template <typename T_, typename U_>
+ class CountedPtr;
+
+ /**
+ * For use by stringify.
+ *
+ * \ingroup grpstringify
+ */
+ namespace stringify_internals
+ {
+ /**
+ * Check that T_ is a sane type to be stringified.
+ *
+ * \ingroup grpstringify
+ */
+ template <typename T_>
+ struct CheckType
+ {
+ /// Yes, we are a sane type.
+ enum { value = 0 } Value;
+ };
+
+ /**
+ * Check that T_ is a sane type to be stringified, which it isn't
+ * if it's a pointer unless it's a char * pointer.
+ *
+ * \ingroup grpstringify
+ */
+ template <typename T_>
+ struct CheckType<T_ *>
+ {
+ };
+
+ /**
+ * Check that T_ is a sane type to be stringified, which it isn't
+ * if it's a CountedPtr.
+ *
+ * \ingroup grpstringify
+ */
+ template <typename T_, typename U_>
+ struct CheckType<CountedPtr<T_, U_> >
+ {
+ };
+
+ /**
+ * Check that T_ is a sane type to be stringified, which it isn't
+ * if it's a pointer unless it's a char * pointer.
+ *
+ * \ingroup grpstringify
+ */
+ template <>
+ struct CheckType<char *>
+ {
+ /// Yes, we are a sane type.
+ enum { value = 0 } Value;
+ };
+ }
+
+ /**
+ * Convert item to a string.
+ *
+ * \ingroup grpstringify
+ */
+ template <typename T_>
+ std::string
+ stringify(const T_ & item)
+ {
+ /* check that we're not trying to stringify a pointer or somesuch */
+ int check_for_stringifying_silly_things
+ PALUDIS_ATTRIBUTE((unused)) = stringify_internals::CheckType<T_>::value;
+
+ std::ostringstream s;
+ s << item;
+ return s.str();
+ }
+
+ /**
+ * Convert item to a string (overload for std::string).
+ *
+ * \ingroup grpstringify
+ */
+ inline std::string
+ stringify(const std::string & item)
+ {
+ return item;
+ }
+
+ /**
+ * Convert item to a string (overload for char).
+ *
+ * \ingroup grpstringify
+ */
+ inline std::string
+ stringify(const char & item)
+ {
+ return std::string(1, item);
+ }
+
+ /**
+ * Convert item to a string (overload for unsigned char).
+ *
+ * \ingroup grpstringify
+ */
+ inline std::string
+ stringify(const unsigned char & item)
+ {
+ return std::string(1, item);
+ }
+
+ /**
+ * Convert item to a string (overload for bool).
+ *
+ * \ingroup grpstringify
+ */
+ inline std::string
+ stringify(const bool & item)
+ {
+ return item ? "true" : "false";
+ }
+
+ /**
+ * Convert item to a string (overload for char *, which isn't a
+ * screwup like other pointers).
+ *
+ * \ingroup grpstringify
+ */
+ inline std::string
+ stringify(const char * const item)
+ {
+ return std::string(item);
+ }
+}
+
+#endif