attempt to fix DateTime.Now issue

ClassicalSharp/Blocks/BlockInfo.cs

@@ -250,7 +250,6 @@ namespace ClassicalSharp {
 			"_Gold_Iron_Double slab_Slab_Brick_TNT_Bookshelf_Mossy rocks_Obsidian_Cobblestone slab_Rope_Sandstone" +
 			"_Snow_Fire_Light pink_Forest green_Brown_Deep blue_Turquoise_Ice_Ceramic tile_Magma_Pillar_Crate_Stone brick";	
 		
-		static StringBuffer buffer = new StringBuffer(64);
 		static string DefaultName(BlockID block) {
 			if (block >= Block.CpeCount) return "Invalid";
 			
@@ -258,14 +257,11 @@ namespace ClassicalSharp {
 			int start = 0;
 			for (int i = 0; i < block; i++)
 				start = RawNames.IndexOf('_', start) + 1;
+			
 			int end = RawNames.IndexOf('_', start);
 			if (end == -1) end = RawNames.Length;
 			
-			buffer.Clear();
-			for (int i = start; i < end; i++) {
-				buffer.Append(RawNames[i]);
-			}
-			return buffer.ToString();
+			return RawNames.Substring(start, end - start);
 		}
 		
 		

ClassicalSharp/Game/ChatLog.cs

@@ -96,7 +96,7 @@ namespace ClassicalSharp {
 		StreamWriter writer = null;
 		void LogChatToFile(string text) {
 			if (logName == null || !game.ChatLogging) return;
-			DateTime now = DateTime.Now;
+			DateTime now = Utils.LocalNow();
 			
 			if (now.Day != last.Day || now.Month != last.Month || now.Year != last.Year) {
 				Dispose();

ClassicalSharp/Game/Game.cs

@@ -379,7 +379,7 @@ namespace ClassicalSharp {
 				Platform.DirectoryCreate("screenshots");
 			}
 			
-			string timestamp = DateTime.Now.ToString("dd-MM-yyyy-HH-mm-ss");
+			string timestamp = Utils.LocalNow().ToString("dd-MM-yyyy-HH-mm-ss");
 			string file = "screenshot_" + timestamp + ".png";
 			string path = PathIO.Combine("screenshots", file);
 			

ClassicalSharp/Network/Utils/AsyncDownloader.cs

@@ -216,7 +216,7 @@ namespace ClassicalSharp.Network {
 		
 		static DateTime GetLastModified(HttpWebResponse response) {
 			// System.NotSupportedException: Can't get timezone name.
-			// gets thrown on some platforms with DateTime.Now
+			// Gets thrown on some platforms with DateTime.Now
 			try {
 				if (response.Headers.Get("Last-Modified") != null)
 					return response.LastModified;

ClassicalSharp/Utils/ErrorHandler.cs

@@ -47,7 +47,7 @@ namespace ClassicalSharp {
 					using (StreamWriter w = new StreamWriter(fs))
 				{
 					w.WriteLine("=== crash occurred ===");
-					w.WriteLine("Time: " + DateTime.Now);
+					w.WriteLine("Time: " + Utils.LocalNow());
 					
 					string platform = Configuration.RunningOnMono ? "Mono " : ".NET ";
 					platform += Environment.Version;

ClassicalSharp/Utils/Utils.cs

@@ -2,6 +2,8 @@
 using System;
 using System.Drawing;
 using System.Globalization;
+using System.Runtime.InteropServices;
+using System.Security;
 #if !LAUNCHER
 using ClassicalSharp.Model;
 #endif
@@ -29,6 +31,32 @@ namespace ClassicalSharp {
 		
 		public const int StringLength = 64;
 		
+		[StructLayout(LayoutKind.Sequential, Pack=2)]
+		internal struct SYSTEMTIME {
+			public ushort Year, Month, DayOfWeek, Day;
+			public ushort Hour, Minute, Second, Millis;
+		}
+		
+		[DllImport("kernel32.dll"), SuppressUnmanagedCodeSecurity]
+		static extern void GetLocalTime(out SYSTEMTIME st);	
+		
+		static DateTime LocalNow_Windows() {
+			SYSTEMTIME st; GetLocalTime(out st);
+			return new DateTime(st.Year, st.Month, st.Day, st.Hour, st.Minute, 
+			                    st.Second, st.Millis, DateTimeKind.Local);
+		}
+		
+		public static DateTime LocalNow() {
+			// System.NotSupportedException: Can't get timezone name.
+			// Gets thrown on some platforms with DateTime.Now
+			try {
+				// avoid pinvoke-ing GetLocalTime function on non-windows OS
+				if (OpenTK.Configuration.RunningOnWindows) return LocalNow_Windows();
+			} catch { }
+			return DateTime.Now;
+		}
+
+		
 		public static string StripColours(string value) {
 			if (value.IndexOf('&') == -1) return value;
 			char[] output = new char[value.Length];

Launcher2/Patcher/ZipWriter.cs

@@ -18,7 +18,7 @@ namespace Launcher.Patcher {
 		public ZipWriter(Stream stream) {
 			this.stream = stream;
 			writer = new BinaryWriter(stream);
-			now = DateTime.Now;
+			now = Utils.LocalNow();
 		}
 		
 		internal ZipEntry[] entries;