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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
+ */
+
+#include <paludis/util/exception.hh>
+#include <paludis/util/strip.hh>
+#include <paludis/util/stringify.hh>
+
+/** \file
+ * Implementation of strip things.
+ *
+ * \ingroup grpstrippers
+ */
+
+namespace paludis
+{
+ std::string strip_leading_string(const std::string & s, const std::string & prefix)
+ {
+ try
+ {
+ if (0 == s.compare(0, prefix.length(), prefix))
+ return s.substr(prefix.length());
+ else
+ return s;
+ }
+ catch (const std::exception & e)
+ {
+ throw InternalError(PALUDIS_HERE, "Caught unexpected exception " +
+ stringify(e.what()));
+ }
+ }
+
+ std::string strip_leading(const std::string & s, const std::string & remove)
+ {
+ try
+ {
+ std::string::size_type p(s.find_first_not_of(remove));
+ if (std::string::npos == p)
+ return std::string();
+ else
+ return s.substr(p);
+ }
+ catch (const std::exception & e)
+ {
+ throw InternalError(PALUDIS_HERE, "Caught unexpected exception " +
+ stringify(e.what()));
+ }
+ }
+
+ std::string strip_trailing_string(const std::string & s, const std::string & suffix)
+ {
+ try
+ {
+ if (suffix.length() > s.length())
+ return s;
+ else if (0 == s.compare(s.length() - suffix.length(), suffix.length(), suffix))
+ return s.substr(0, s.length() - suffix.length());
+ else
+ return s;
+ }
+ catch (const std::exception & e)
+ {
+ throw InternalError(PALUDIS_HERE, "Caught unexpected exception " +
+ stringify(e.what()) + " with s='" + s + "', suffix='" + suffix + "'");
+ }
+ }
+
+ std::string strip_trailing(const std::string & s, const std::string & remove)
+ {
+ try
+ {
+ std::string::size_type p(s.find_last_not_of(remove));
+ if (std::string::npos == p)
+ return std::string();
+ else
+ return s.substr(0, p + 1);
+ }
+ catch (const std::exception & e)
+ {
+ throw InternalError(PALUDIS_HERE, "Caught unexpected exception " +
+ stringify(e.what()));
+ }
+ }
+}
+