rollback to 3428, before the mysterious removal of libs/* at 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/ardour/session_state_utils.cc

@@ -0,0 +1,76 @@
+/*
+	Copyright (C) 2007 Tim Mayberry 
+
+	This program 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 2 of the License, or
+	(at your option) any later version.
+
+	This program 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <algorithm>
+
+#include <pbd/compose.h>
+#include <pbd/error.h>
+#include <pbd/file_utils.h>
+
+#include <ardour/session_state_utils.h>
+#include <ardour/filename_extensions.h>
+
+#include "i18n.h"
+
+namespace ARDOUR {
+
+bool
+create_backup_file (const sys::path & file_path)
+{
+	if (!sys::exists (file_path)) return false;
+
+	sys::path backup_path(file_path.to_string() + backup_suffix);
+
+	try
+	{
+		sys::copy_file (file_path, backup_path);
+	}
+	catch(sys::filesystem_error& ex)
+	{
+		error << string_compose (_("Unable to create a backup copy of file %1 (%2)"),
+				file_path.to_string(), ex.what())
+			<< endmsg;
+		return false;
+	}
+	return true;
+}
+
+void
+get_state_files_in_directory (const sys::path & directory_path,
+		vector<sys::path> & result)
+{
+	Glib::PatternSpec state_file_pattern('*' + string(statefile_suffix));
+	
+	find_matching_files_in_directory (directory_path, state_file_pattern,
+			result);
+}
+
+vector<string>
+get_file_names_no_extension (const vector<sys::path> & file_paths)
+{
+	vector<string> result;
+
+	std::transform (file_paths.begin(), file_paths.end(),
+			std::back_inserter(result), sys::basename);
+
+	sort (result.begin(), result.end(), std::less<string>());
+
+	return result;
+}
+
+} // namespace ARDOUR