/* 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 "daemon.h"

#include <glibtop/error.h>

void

do_output (int s, glibtop_response *resp, off_t offset,

	   size_t data_size, const void *data)

{

	glibtop_debug ("Really writing %d bytes at offset %lu.",

		 sizeof (glibtop_response), offset);

	resp->offset = offset;

	resp->data_size = data_size;

	if (s == 0) {

		if (write (1, (const void *) resp, sizeof (glibtop_response)) < 0)

			glibtop_warn_io ("write");

	} else {

		if (send (s, (const void *) resp, sizeof (glibtop_response), 0) < 0)

			glibtop_warn_io ("send");

	}

	if (resp->data_size) {

		glibtop_debug ("Writing %d bytes of data.", resp->data_size);

		if (s == 0) {

			if (write (1, data, resp->data_size) < 0)

				glibtop_warn_io ("write");

		} else {

			if (send (s, data, resp->data_size, 0) , 0)

				glibtop_warn_io ("send");

		}

	}

}

int

do_read (int s, void *ptr, size_t total_size)

{

	int nread;

	char *tmp_ptr;

	size_t already_read = 0, remaining = total_size;

	while (already_read < total_size) {

		if (s)

			nread = recv (s, ptr, remaining, 0);

		else

			nread = read (0, ptr, remaining);

		if ((already_read == 0) && (nread == 0)) {

			glibtop_warn ("pid %d received eof.", getpid ());

			return 0;

		}

		if (nread <= 0) {

			glibtop_warn_io ("recv");

			return 0;

		}

		already_read += nread;

		remaining -= nread;

		/* (char *) ptr += nread; */

		tmp_ptr = ptr;

		tmp_ptr += nread;

		ptr = tmp_ptr;

		glibtop_debug ("READ (%d): %d - %d - %d",

			 nread, already_read, remaining, total_size);

	}

	return already_read;

}