C++ (Cpp) command_context_init Examples

Example #1

File: main.c Project: Reilithion/xmms2-reilithion

/* Parse the argv array with GOptionContext, using the given argument
 * definitions, and return a command context structure containing
 * argument values.
 * Note: The lib doesn't like argv starting with a flag, so keep a
 * token before that to avoid problems.
 */
static command_context_t *
init_context_from_args (argument_t *argdefs, gint argc, gchar **argv)
{
	/* FIXME: look at the error! */
	command_context_t *ctx;
	GOptionContext *context;
	GError *error = NULL;
	gint i;

	ctx = command_context_init (argc, argv);

	for (i = 0; argdefs && argdefs[i].long_name; ++i) {
		command_argument_t *arg = g_new (command_argument_t, 1);

		switch (argdefs[i].arg) {
		case G_OPTION_ARG_NONE:
			arg->type = COMMAND_ARGUMENT_TYPE_BOOLEAN;
			arg->value.vbool = FALSE;
			argdefs[i].arg_data = &arg->value.vbool;
			break;

		case G_OPTION_ARG_INT:
			arg->type = COMMAND_ARGUMENT_TYPE_INT;
			arg->value.vint = -1;
			argdefs[i].arg_data = &arg->value.vint;
			break;

		case G_OPTION_ARG_STRING:
			arg->type = COMMAND_ARGUMENT_TYPE_STRING;
			arg->value.vstring = NULL;
			argdefs[i].arg_data = &arg->value.vstring;
			break;

		default:
			g_printf (_("Trying to register a flag '%s' of invalid type!"),
			          argdefs[i].long_name);
			break;
		}

		g_hash_table_insert (ctx->flags,
		                     g_strdup (argdefs[i].long_name), arg);
	}

	context = g_option_context_new (NULL);
	g_option_context_set_help_enabled (context, FALSE);  /* runs exit(0)! */
	g_option_context_add_main_entries (context, argdefs, NULL);
	g_option_context_parse (context, &ctx->argc, &ctx->argv, &error);
	g_option_context_free (context);

	return ctx;
}

Example #2

File: main.c Project: chrippa/xmms2

/* Parse the argv array with GOptionContext, using the given argument
 * definitions, and return a command context structure containing
 * argument values.
 * Note: The lib doesn't like argv starting with a flag, so keep a
 * token before that to avoid problems.
 *
 * The passed argv should be an array of length argc+1. (So that a terminating
 * NULL-pointer can be added in argv[argc].)
 */
static command_context_t *
init_context_from_args (argument_t *argdefs, gint argc, gchar **argv)
{
	command_context_t *ctx;
	GOptionContext *context;
	GError *error = NULL;
	gint i;

	ctx = command_context_init (argc, argv);

	for (i = 0; argdefs && argdefs[i].long_name; ++i) {
		command_argument_t *arg = g_new (command_argument_t, 1);

		switch (argdefs[i].arg) {
		case G_OPTION_ARG_NONE:
			arg->type = COMMAND_ARGUMENT_TYPE_BOOLEAN;
			arg->value.vbool = FALSE;
			argdefs[i].arg_data = &arg->value.vbool;
			break;

		case G_OPTION_ARG_INT:
			arg->type = COMMAND_ARGUMENT_TYPE_INT;
			arg->value.vint = -1;
			argdefs[i].arg_data = &arg->value.vint;
			break;

		case G_OPTION_ARG_STRING:
			arg->type = COMMAND_ARGUMENT_TYPE_STRING;
			arg->value.vstring = NULL;
			argdefs[i].arg_data = &arg->value.vstring;
			break;

		case G_OPTION_ARG_STRING_ARRAY:
			arg->type = COMMAND_ARGUMENT_TYPE_STRING_ARRAY;
			arg->value.vstringv = NULL;
			argdefs[i].arg_data = &arg->value.vstringv;
			break;

		default:
			g_printf (_("Trying to register a flag '%s' of invalid type!"),
			          argdefs[i].long_name);
			break;
		}

		g_hash_table_insert (ctx->flags,
		                     g_strdup (argdefs[i].long_name), arg);
	}

	context = g_option_context_new (NULL);
	g_option_context_set_help_enabled (context, FALSE);  /* runs exit(0)! */
	g_option_context_set_ignore_unknown_options (context, TRUE);
	g_option_context_add_main_entries (context, argdefs, NULL);
	g_option_context_parse (context, &ctx->argc, &ctx->argv, &error);
	g_option_context_free (context);

	if (error) {
		g_printf (_("Error: %s\n"), error->message);
		g_error_free (error);
		command_context_free (ctx);
		return NULL;
	}

	/* strip --, check for unknown options before it */
	/* FIXME: We do not parse options elsewhere, do we? */
	for (i = 0; i < ctx->argc; i++) {
		if (strcmp (ctx->argv[i], "--") == 0) {
			break;
		}
		if (ctx->argv[i][0] == '-' && ctx->argv[i][1] != '\0' &&
		    !(ctx->argv[i][1] >= '0' && ctx->argv[i][1] <= '9')) {

			g_printf (_("Error: Unknown option '%s'\n"), ctx->argv[i]);
			command_context_free (ctx);
			return NULL;
		}
	}
	if (i != ctx->argc) {
		for (i++; i < ctx->argc; i++) {
			argv[i-1] = argv[i];
		}
		ctx->argc--;
	}

	/* Some functions rely on NULL-termination. */
	ctx->argv[ctx->argc] = NULL;
	return ctx;
}