desktop: Add function to obtain OS version string

Highly unreliable and generally useless, see the Doxygen documentation.
Also missing the actual Windows implementation for the moment. Also,
since uname() is highly useless on most platforms, I'll need to think up
a better OS X implementation later down the road.

projectfiles/CodeBlocks/wesnoth.cbp

@@ -249,6 +249,8 @@
 		<Unit filename="../../src/desktop/notifications.hpp" />
 		<Unit filename="../../src/desktop/open.cpp" />
 		<Unit filename="../../src/desktop/open.hpp" />
+		<Unit filename="../../src/desktop/version.cpp" />
+		<Unit filename="../../src/desktop/version.hpp" />
 		<Unit filename="../../src/desktop/windows_console.cpp" />
 		<Unit filename="../../src/desktop/windows_console.hpp" />
 		<Unit filename="../../src/desktop/windows_tray_notification.cpp" />

src/CMakeLists.txt

@@ -775,6 +775,7 @@ set(wesnoth-main_SRC
 	game_initialization/depcheck.cpp
 	desktop/notifications.cpp
 	desktop/open.cpp
+	desktop/version.cpp
 	dialogs.cpp
 	display_chat_manager.cpp
 	editor/action/action.cpp

src/SConscript

@@ -261,6 +261,7 @@ wesnoth_sources = Split("""
     game_initialization/create_engine.cpp
     desktop/notifications.cpp
     desktop/open.cpp
+    desktop/version.cpp
     game_initialization/depcheck.cpp
     dialogs.cpp
     display_chat_manager.cpp

src/desktop/version.cpp

@@ -0,0 +1,79 @@
+/*
+   Copyright (C) 2015 by Ignacio Riquelme Morelle <shadowm2006@gmail.com>
+   Part of the Battle for Wesnoth Project http://www.wesnoth.org/
+
+   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.
+
+   See the COPYING file for more details.
+*/
+
+#define GETTEXT_DOMAIN "wesnoth-lib"
+
+#include "desktop/version.hpp"
+
+#include "formatter.hpp"
+#include "gettext.hpp"
+#include "log.hpp"
+
+#if defined(_X11) || defined(__APPLE__)
+
+#include <cerrno>
+#include <cstring>
+
+#include <sys/utsname.h>
+
+#endif
+
+#ifdef _WIN32
+
+#ifndef UNICODE
+#define UNICODE
+#endif
+#define WIN32_LEAN_AND_MEAN
+
+#include <windows.h>
+
+#endif
+
+static lg::log_domain log_desktop("desktop");
+#define ERR_DU LOG_STREAM(err, log_desktop)
+#define LOG_DU LOG_STREAM(info, log_desktop)
+
+namespace desktop
+{
+
+std::string os_version()
+{
+#if defined(_X11) || defined(__APPLE__)
+
+	utsname u;
+
+	if(uname(&u) != 0) {
+		ERR_DU << "os_version: uname error (" << strerror(errno) << ")\n";
+	}
+
+	return (formatter() << u.sysname << ' '
+						<< u.release << ' '
+						<< u.version << ' '
+						<< u.machine).str();
+
+#elif defined(_WIN32)
+
+	ERR_DU << "os_version: STUB!\n";
+	return "Microsoft Windows";
+
+#else
+
+	ERR_DU << "os_version(): unsupported platform\n";
+	return _("operating_system^<unknown>");
+
+#endif
+}
+
+} // end namespace desktop
+

src/desktop/version.hpp

@@ -0,0 +1,42 @@
+/*
+   Copyright (C) 2015 by Ignacio Riquelme Morelle <shadowm2006@gmail.com>
+   Part of the Battle for Wesnoth Project http://www.wesnoth.org/
+
+   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.
+
+   See the COPYING file for more details.
+*/
+
+/**
+ * @file
+ * Platform identification and version information functions.
+ */
+
+#ifndef DESKTOP_VERSION_HPP_INCLUDED
+#define DESKTOP_VERSION_HPP_INCLUDED
+
+#include <string>
+
+namespace desktop
+{
+
+/**
+ * Returns a string with the running OS name and version information.
+ *
+ * On Unix-type platforms, this will be the uname information (which is rarely
+ * useful). On Windows, this is a string we generate ourselves by processing
+ * GetVersionEx's output data.
+ *
+ * Needless to say, this is a highly experimental and unreliable function and
+ * odds are its output is not particularly useful most of the time.
+ */
+std::string os_version();
+
+}
+
+#endif