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+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 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_STRIP_HH
+#define PALUDIS_GUARD_PALUDIS_STRIP_HH 1
+
+#include <functional>
+#include <string>
+#include <paludis/util/attributes.hh>
+
+/** \file
+ * Strip functions and adapters.
+ *
+ * \ingroup grpstrippers
+ */
+
+namespace paludis
+{
+ /**
+ * Return a string equal to s minus any leading characters that are
+ * contained in prefix.
+ *
+ * \ingroup grpstrippers
+ */
+ std::string strip_leading_string(const std::string & s, const std::string & prefix) PALUDIS_VISIBLE;
+
+ /**
+ * Return a string equal to s, minus the string remove if remove occurs at
+ * the start of s.
+ *
+ * \ingroup grpstrippers
+ */
+ std::string strip_leading(const std::string & s, const std::string & remove) PALUDIS_VISIBLE;
+
+ /**
+ * Return a string equal to s minus any trailing characters that are
+ * contained in suffix.
+ *
+ * \ingroup grpstrippers
+ */
+ std::string strip_trailing_string(const std::string & s, const std::string & suffix) PALUDIS_VISIBLE;
+
+ /**
+ * Return a string equal to s, minus the string remove if remove occurs at
+ * the end of s.
+ *
+ * \ingroup grpstrippers
+ */
+ std::string strip_trailing(const std::string & s, const std::string & remove) PALUDIS_VISIBLE;
+
+ /**
+ * Adapt one of the strip_ functions for use as a std::unary_function by
+ * binding a value to the second parameter (avoids the reference to const
+ * issue with std::bind2nd).
+ *
+ * \ingroup grpstrippers
+ */
+ template <std::string (* f_)(const std::string &, const std::string &)>
+ class StripAdapter :
+ public std::unary_function<std::string, const std::string>
+ {
+ private:
+ const std::string _second;
+
+ public:
+ ///\name Basic operations
+ ///\{
+
+ StripAdapter(const std::string & second) :
+ _second(second)
+ {
+ }
+
+ ///\}
+
+ /**
+ * Operation.
+ */
+ std::string operator() (const std::string & first) const
+ {
+ return (*f_)(first, _second);
+ }
+ };
+
+ /**
+ * Adapt strip_leading_string to a functor by binding its second argument.
+ *
+ * \ingroup grpstrippers
+ */
+ typedef StripAdapter<&strip_leading_string> StripLeadingString;
+
+ /**
+ * Adapt strip_leading to a functor by binding its second argument.
+ *
+ * \ingroup grpstrippers
+ */
+ typedef StripAdapter<&strip_leading> StripLeading;
+
+ /**
+ * Adapt strip_trailing_string to a functor by binding its second argument.
+ *
+ * \ingroup grpstrippers
+ */
+ typedef StripAdapter<&strip_trailing_string> StripTrailingString;
+
+ /**
+ * Adapt strip_trailing to a functor by binding its second argument.
+ *
+ * \ingroup grpstrippers
+ */
+ typedef StripAdapter<&strip_trailing> StripTrailing;
+}
+
+#endif