Make windows-console setup code re-usable

libs/pbd/pbd/win_console.h

@@ -0,0 +1,73 @@
+/* STATIC FUNCTIONS -- INCLUDE DIRECTLY BEFORE  main () */
+
+#if (!defined COMPILER_MSVC && defined PLATFORM_WINDOWS)
+
+static FILE* pStdOut = 0;
+static FILE* pStdErr = 0;
+static BOOL  bConsole;
+static HANDLE hStdOut;
+
+static bool
+IsAConsolePort (HANDLE handle)
+{
+	DWORD mode;
+	return (GetConsoleMode(handle, &mode) != 0);
+}
+
+static void
+console_madness_begin ()
+{
+	bConsole = AttachConsole(ATTACH_PARENT_PROCESS);
+	hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
+
+	/* re-attach to the console so we can see 'printf()' output etc.
+	 * for MSVC see  gtk2_ardour/msvc/winmain.cc
+	 */
+
+	if ((bConsole) && (IsAConsolePort(hStdOut))) {
+		pStdOut = freopen( "CONOUT$", "w", stdout );
+		pStdErr = freopen( "CONOUT$", "w", stderr );
+	}
+}
+
+static void
+console_madness_end ()
+{
+	if (pStdOut) {
+		fclose (pStdOut);
+	}
+	if (pStdErr) {
+		fclose (pStdErr);
+	}
+
+	if (bConsole) {
+		// Detach and free the console from our application
+		INPUT_RECORD input_record;
+
+		input_record.EventType = KEY_EVENT;
+		input_record.Event.KeyEvent.bKeyDown = TRUE;
+		input_record.Event.KeyEvent.dwControlKeyState = 0;
+		input_record.Event.KeyEvent.uChar.UnicodeChar = VK_RETURN;
+		input_record.Event.KeyEvent.wRepeatCount      = 1;
+		input_record.Event.KeyEvent.wVirtualKeyCode   = VK_RETURN;
+		input_record.Event.KeyEvent.wVirtualScanCode  = MapVirtualKey( VK_RETURN, 0 );
+
+		DWORD written = 0;
+		WriteConsoleInput( GetStdHandle( STD_INPUT_HANDLE ), &input_record, 1, &written );
+
+		FreeConsole();
+	}
+}
+
+#elif (defined(COMPILER_MSVC) && defined(NDEBUG) && !defined(RDC_BUILD))
+
+// these are not used here. for MSVC see gtk2_ardour/msvc/winmain.cc
+static void console_madness_begin () {}
+static void console_madness_end () {}
+
+#else
+
+static void console_madness_begin () {}
+static void console_madness_end () {}
+
+#endif