/* Copyright (C) 1998-99 Martin Baulig

   This file is part of LibGTop 1.0.

   Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.

   LibGTop is free software; you can redistribute it and/or modify it

   under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License,

   or (at your option) any later version.

   LibGTop 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.

   You should have received a copy of the GNU General Public License

   along with LibGTop; see the file COPYING. If not, write to the

   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

   Boston, MA 02110-1301, USA.

*/

#include <config.h>

#include <glibtop.h>

#include <glibtop/parameter.h>

#include <glibtop/error.h>

#define _write_data(ptr,size)	\

	if ((data_ptr == NULL) || (data_size < size)) return -size; \

	if (ptr == NULL) { char * const p = data_ptr; *p = '\0'; return 1; } \

	memcpy (data_ptr, ptr, size);	\

	return size;

#define _check_data(size)	\

	if ((data_ptr == NULL) || (data_size != size)) { \

		glibtop_warn_r (server, "glibtop_set_parameter (%u): " \

				"Expected %lu bytes but got %lu.", \

				(unsigned) parameter, (unsigned long) size, (unsigned long) data_size); \

		return; \

	}

#define _strlen(ptr)	(ptr ? strlen (ptr) : 0)

size_t

glibtop_get_parameter_l (glibtop *server, const unsigned parameter,

			 void *data_ptr, size_t data_size)

{

	switch (parameter) {

	case GLIBTOP_PARAM_METHOD:

		_write_data (&server->method,

			     sizeof (server->method));

	case GLIBTOP_PARAM_FEATURES:

		_write_data (&server->features,

			     sizeof (server->features));

	case GLIBTOP_PARAM_COMMAND:

		_write_data (server->server_command,

			     _strlen(server->server_command));

	case GLIBTOP_PARAM_HOST:

		_write_data (server->server_host,

			     _strlen(server->server_host));

	case GLIBTOP_PARAM_PORT:

		_write_data (&server->server_port,

			     sizeof (server->server_port));

	case GLIBTOP_PARAM_ERROR_METHOD:

		_write_data (&server->error_method,

			     sizeof (server->error_method));

	case GLIBTOP_PARAM_REQUIRED:

		_write_data (&server->required,

			     sizeof (server->required));

	}

	return 0;

}

void

glibtop_set_parameter_l (glibtop *server, const unsigned parameter,

			 const void *data_ptr, size_t data_size)

{

	switch (parameter) {

	case GLIBTOP_PARAM_METHOD:

		_check_data (sizeof (server->method));

		memcpy (&server->method, data_ptr, data_size);

		break;

	case GLIBTOP_PARAM_FEATURES:

		/* You should not be allowed to set this field. */

		glibtop_warn_r (server, "glibtop_set_parameter (%u): " \

				"Cannot modify read-only value.",

				parameter);

		break;

	case GLIBTOP_PARAM_ERROR_METHOD:

		_check_data (sizeof (server->error_method));

		memcpy (&server->error_method, data_ptr, data_size);

		break;

	case GLIBTOP_PARAM_REQUIRED:

		_check_data (sizeof (server->required));

		memcpy (&server->required, data_ptr, data_size);

		break;

	}

}