Refactored some platform dependent code into a new library,

lib/arch.  This should make porting easier.  Will probably
continue to refactor a little more, moving platform dependent
event handling stuff into lib/platform.

lib/common/common.h

@@ -0,0 +1,74 @@
+/*
+ * synergy -- mouse and keyboard sharing utility
+ * Copyright (C) 2002 Chris Schoeneman
+ * 
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file COPYING that should have accompanied this file.
+ * 
+ * This package 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.
+ */
+
+#ifndef COMMON_H
+#define COMMON_H
+
+// this file should be included, directly or indirectly by every other.
+
+#if HAVE_CONFIG_H
+#	include "config.h"
+#endif
+
+// check if win32 platform
+#if defined(_WIN32)
+#	define WINDOWS_LIKE 1
+
+	// VC++ specific
+#	if (_MSC_VER >= 1200)
+		// work around for statement scoping bug
+#		define for if (false) { } else for
+
+		// turn off bonehead warnings
+#		pragma warning(disable: 4786) // identifier truncated in debug info
+#		pragma warning(disable: 4514) // unreferenced inline function removed
+
+		// this one's a little too aggressive
+#		pragma warning(disable: 4127) // conditional expression is constant
+
+		// emitted incorrectly under release build in some circumstances
+#		if defined(NDEBUG)
+#			pragma warning(disable: 4702) // unreachable code
+#			pragma warning(disable: 4701) // variable maybe used uninitialized
+#		endif
+
+#	endif // (_MSC_VER >= 1200)
+
+	// VC++ has built-in sized types
+#	if defined(_MSC_VER)
+#		define TYPE_OF_SIZE_1 __int8
+#		define TYPE_OF_SIZE_2 __int16
+#		define TYPE_OF_SIZE_4 __int32
+#	else
+#		define SIZE_OF_CHAR		1
+#		define SIZE_OF_SHORT	2
+#		define SIZE_OF_INT		4
+#		define SIZE_OF_LONG		4
+#	endif
+#endif // defined(_WIN32)
+
+// unix-like if not like anything else
+#if (!defined(WINDOWS_LIKE) || WINDOWS_LIKE == 0)
+#	define UNIX_LIKE 1
+#endif
+
+// define NULL
+#ifndef NULL
+#define NULL 0
+#endif
+
+// make assert available since we use it a lot
+#include <assert.h>
+
+#endif