Main Loop, IO Channels and my CLI

[Øystein Johansen <oystein gnubg org>]

Hi,

I've just made a small glib code that read commands from from a command
line interface prompt. It uses g_main_loop and a g_io_channel. I've
attached the code.

First:
It nearly works as expected. The callback is called each time I enter a
command, and it's parsed to the command handler. However, I want to
expand this to system to use automatic string completion, (the system
provided in glib), for all available commands. Now it only handles
command as I press enter. I guess I need a extra callback for each
keypress. This callback can check if I press <TAB> and then call
g_completion_complete(), but how do I attach such a signal to the main loop?

Then:
Can this be a bug? It work fine unless I use a special scandinavian
letter in my commands. Do I have to convert my string at any time? How?
(I'm using win32 command prompt window)

Example:
myprompt> hello
You typed: hello
myprompt> Æsop

** (gnubg.exe:3128): WARNING **: Something went wrong
Invalid byte sequence in conversion input

-Øystein

#include <glib.h>
#include <glib/gprintf.h>

static void
prompt(){
	g_printf("myprompt> ");
}

static void
handlecommand( gchar *sz ){
	g_printf( "You typed: %s", sz );
	prompt();
}

static gboolean
mycallback( GIOChannel *channel, GIOCondition cond, gpointer data)
{

	gchar *str_return;
	gsize length, terminator_pos;
	GError *error = NULL;
		
        if( g_io_channel_read_line( channel, &str_return, &length, &terminator_pos, &error) == G_IO_STATUS_ERROR )
		g_warning("Something went wrong");

	if ( error != NULL ) {
		g_printf(error->message);
		exit(1);
	}

	handlecommand( str_return );
	g_free( str_return );
	return TRUE;
}	

int
main(int argc, char* argv[])
{

	GMainLoop *mainloop = g_main_loop_new( NULL, FALSE);	
#ifdef G_OS_WIN32
	GIOChannel *channel = g_io_channel_win32_new_fd( STDIN_FILENO );
#else
	GIOChannel *channel = g_io_channel_unix_new( STDIN_FILENO );
#endif
	prompt();
	
	g_io_add_watch( channel, G_IO_IN, mycallback, NULL );
	g_main_loop_run(mainloop);
	
	return 0;
}

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