Move source into separate sub directories.

persistent-data/error_set.h

@@ -0,0 +1,71 @@
+// Copyright (C) 2011 Red Hat, Inc. All rights reserved.
+//
+// This file is part of the thin-provisioning-tools source.
+//
+// thin-provisioning-tools is free software: you can redistribute it
+// and/or modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// thin-provisioning-tools 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 thin-provisioning-tools.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+#ifndef ERROR_SET_H
+#define ERROR_SET_H
+
+#include <boost/optional.hpp>
+#include <boost/shared_ptr.hpp>
+#include <list>
+#include <iosfwd>
+#include <string>
+
+//----------------------------------------------------------------
+
+namespace persistent_data {
+	// When checking the metadata for a thin device we don't want to
+	// stop at the first error.  Instead should collect as much
+	// information as possible.  The errors are hierarchical, so the
+	// user can control how much detail is displayed.
+	class error_set {
+	public:
+		typedef boost::shared_ptr<error_set> ptr;
+
+		error_set(std::string const &err);
+
+		std::string const &get_description() const;
+		std::list<error_set::ptr> const &get_children() const;
+		void add_child(error_set::ptr err);
+		void add_child(boost::optional<error_set::ptr> maybe_errs);
+		void add_child(std::string const &err);
+		bool empty() const;
+
+	private:
+		std::string err_;
+		std::list<error_set::ptr> children_;
+	};
+
+	// The error_selector is a little proxy class used when printing
+	// errors to a stream.
+	class error_selector {
+	public:
+		error_selector(error_set::ptr errs, unsigned depth);
+
+		void print(std::ostream &out) const;
+
+	private:
+		error_set::ptr errs_;
+		unsigned depth_;
+	};
+
+	std::ostream &operator << (std::ostream &out, error_selector const &errs);
+}
+
+//----------------------------------------------------------------
+
+#endif