source: trunk/third/libgtop/lib/read.c @ 20897

/* $Id: read.c,v 1.1.1.2 2004-10-03 04:59:56 ghudson Exp $ */

/* 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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.
*/

#include <config.h>
#include <glibtop/read.h>
#include "libgtop-i18n.h"


/* Reads some data from server. */

static void
do_read (int s, void *ptr, size_t total_size)
{
        ssize_t nread;

        if(!total_size) return;

        while (total_size && (nread = recv (s, ptr, total_size, 0)) > 0) {
                total_size -= nread;
                ptr = (char*)ptr + nread;
        }

        if(nread == 0)
                close (s);

        if (nread < 0)
                glibtop_error_io ("recv");
}

void
glibtop_read_l (glibtop *server, size_t size, void *buf)
{
        glibtop_init_r (&server, 0, 0);

#ifdef DEBUG
        fprintf (stderr, "LIBRARY: really reading %d bytes.\n", size);
#endif

        if (server->socket) {
                do_read (server->socket, buf, size);
        } else {
                if(read (server->input [0], buf, size) < 0)
                        glibtop_error_io_r (
                                server,
                                ngettext ("read %d byte",
                                          "read %d bytes", size),
                                size);
        }
}