2002-12-10 Gonzalo Paniagua Javier <gonzalo@ximian.com>

* glib/Log.cs: New file. Wraps a few logging functions. Useful for
	debugging.

svn path=/trunk/gtk-sharp/; revision=9517

ChangeLog

@@ -1,3 +1,8 @@
+2002-12-10  Gonzalo Paniagua Javier <gonzalo@ximian.com>
+
+	* glib/Log.cs: New file. Wraps a few logging functions. Useful for
+	debugging.
+
 2002-12-10  Gonzalo Paniagua Javier <gonzalo@ximian.com>
 
 	* generator/Signal.cs: generate correct type name for EventArgs.

glib/Log.cs

@@ -0,0 +1,153 @@
+// Log.cs - Wrapper for message logging functions
+//
+// Authors:
+//	Gonzalo Paniagua Javier (gonzalo@ximian.com)
+//	
+//
+// (c) 2002 Gonzalo Paniagua
+//
+
+namespace GLib {
+
+	using System;
+	using System.Runtime.InteropServices;
+
+	public delegate void LogFunc (string log_domain,
+				      LogLevelFlags log_level,
+				      string message,
+				      IntPtr user_data);
+
+	public delegate void PrintFunc (string message);
+
+	[Flags]
+	public enum LogLevelFlags : uint
+	{
+		/* log flags */
+		FlagRecursion          = 1 << 0,
+		FlagFatal              = 1 << 1,
+
+		/* GLib log levels */
+		Error                  = 1 << 2,       /* always fatal */
+		Critical               = 1 << 3,
+		Warning                = 1 << 4,
+		Message                = 1 << 5,
+		Info                   = 1 << 6,
+		Debug                  = 1 << 7,
+
+		/* Convenience values */
+		AllButFatal            = 253,
+		AllButRecursion        = 254,
+		All                    = 255,
+
+		FlagMask               = 3,
+		LevelMask              = (uint) ~3
+	}
+
+	public class Log {
+
+		[DllImport("glib-2.0")]
+		static extern void g_logv (string log_domain, LogLevelFlags flags, string message);
+		
+		public void WriteLog (string logDomain, LogLevelFlags flags, string format, params object [] args)
+		{
+			g_logv (logDomain, flags, String.Format (format, args));
+		}
+
+		[DllImport("glib-2.0")]
+		static extern uint g_log_set_handler (string log_domain,
+						      LogLevelFlags flags,
+						      LogFunc log_func,
+						      IntPtr user_data);
+		
+		public static uint SetLogHandler (string logDomain,
+						  LogLevelFlags flags,
+						  LogFunc logFunc,
+						  IntPtr userData)
+		{
+			return g_log_set_handler (logDomain, flags, logFunc, userData);
+		}
+
+		[DllImport("glib-2.0")]
+		static extern uint g_log_remove_handler (string log_domain, uint handler_id);
+
+		public static void RemoveLogHandler (string logDomain, uint handlerID)
+		{
+			g_log_remove_handler (logDomain, handlerID);
+		}
+
+
+		[DllImport("glib-2.0")]
+		static extern PrintFunc g_set_print_handler (PrintFunc handler);
+
+		public static PrintFunc SetPrintHandler (PrintFunc handler)
+		{
+			return g_set_print_handler (handler);
+		}
+		
+		[DllImport("glib-2.0")]
+		static extern PrintFunc g_set_printerr_handler (PrintFunc handler);
+
+		public static PrintFunc SetPrintErrorHandler (PrintFunc handler)
+		{
+			return g_set_printerr_handler (handler);
+		}
+		
+		[DllImport("glib-2.0")]
+		static extern void g_log_default_handler (string log_domain,
+							  LogLevelFlags log_level,
+							  string message,
+							  IntPtr unused_data);
+
+		public static void DefaultHandler (string logDomain,
+						   LogLevelFlags logLevel,
+						   string message,
+						   IntPtr unusedData)
+		{
+			g_log_default_handler (logDomain, logLevel, message, unusedData);
+		}
+
+		[DllImport("glib-2.0")]
+		extern static LogLevelFlags g_log_set_always_fatal (LogLevelFlags fatal_mask);
+		
+		public static LogLevelFlags SetAlwaysFatal (LogLevelFlags fatalMask)
+		{
+			return g_log_set_always_fatal (fatalMask);
+		}
+
+		[DllImport("glib-2.0")]
+		extern static LogLevelFlags g_log_set_fatal_mask (string log_domain, LogLevelFlags fatal_mask);
+		
+		public static LogLevelFlags SetAlwaysFatal (string logDomain, LogLevelFlags fatalMask)
+		{
+			return g_log_set_fatal_mask (logDomain, fatalMask);
+		}
+
+		/*
+		 * Some common logging methods.
+		 *
+		 * Sample usage:
+		 *
+		 *	// Print the messages for the NULL domain
+		 *	LogFunc logFunc = new GLib.LogFunc (Glib.Log.PrintLogFunction);
+		 *	Log.SetLogHandler (null, GLib.LogLevelFlags.All, logFunc, IntPtr.Zero);
+		 *
+		 *	// Print messages and stack trace for Gtk critical messages
+		 *	logFunc = new GLib.LogFunc (Glib.Log.PrintTraceLogFunction);
+		 *	Log.SetLogHandler ("Gtk", Glib.LogLevelFlags.Critical, logFunc, IntPtr.Zero);
+		 *
+		 */
+
+		public static void PrintLogFunction (string domain, LogLevelFlags level, string message, IntPtr data)
+		{
+			Console.WriteLine ("Domain: '{0}' Level: {1}", domain, level);
+			Console.WriteLine ("Message: {0}", message);
+		}
+
+		public static void PrintTraceLogFunction (string domain, LogLevelFlags level, string message, IntPtr data)
+		{
+			PrintLogFunction (domain, level, message, data);
+			Console.WriteLine ("Trace follows:\n{0}", new System.Diagnostics.StackTrace ());
+		}
+	}
+}
+