/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */

/* $Id$ */

/* 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 <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/proctime.h>

static const unsigned long _glibtop_sysdeps_proc_time =
(1L << GLIBTOP_PROC_TIME_UTIME) + (1L << GLIBTOP_PROC_TIME_CUTIME) +
(1L << GLIBTOP_PROC_TIME_STIME) + (1L << GLIBTOP_PROC_TIME_CSTIME) +
(1L << GLIBTOP_PROC_TIME_FREQUENCY) + (1L << GLIBTOP_PROC_TIME_TIMEOUT) +
(1L << GLIBTOP_PROC_TIME_IT_REAL_VALUE) + (1L << GLIBTOP_PROC_TIME_START_TIME);

static const unsigned long _glibtop_sysdeps_proc_time_smp =
(1L << GLIBTOP_PROC_TIME_XCPU_UTIME) + (1L << GLIBTOP_PROC_TIME_XCPU_STIME);

/* Init function. */

int
glibtop_init_proc_time_s (glibtop *server)
{
    server->sysdeps.proc_time = _glibtop_sysdeps_proc_time;

    if (server->ncpu)
	server->sysdeps.proc_time |= _glibtop_sysdeps_proc_time_smp;

    return 0;
}

/* Provides detailed information about a process. */

int
glibtop_get_proc_time_s (glibtop *server, glibtop_proc_time *buf, pid_t pid)
{
    char buffer [BUFSIZ], *p;
    int i;
	
    glibtop_init_s (&server, GLIBTOP_SYSDEPS_PROC_TIME, 0);

    memset (buf, 0, sizeof (glibtop_proc_time));

    if (proc_stat_to_buffer (buffer, pid))
	return -1;

    p = proc_stat_after_cmd (buffer);
    if (!p) return -1;

    p = skip_multiple_token (p, 11);

    buf->utime  = strtoul (p, &p, 0);
    buf->stime  = strtoul (p, &p, 0);
    buf->cutime = strtoul (p, &p, 0);
    buf->cstime = strtoul (p, &p, 0);

    p = skip_multiple_token (p, 2);

    buf->timeout = strtoul (p, &p, 0);
    buf->it_real_value = strtoul (p, &p, 0);
    buf->start_time = strtoul (p, &p, 0);

    buf->frequency = 100;

    buf->flags = _glibtop_sysdeps_proc_time;

    if (!server->ncpu)
	return 0;

    if (proc_file_to_buffer (buffer, "/proc/%d/cpu", pid))
	return -1;

    p = skip_token (buffer);
    buf->utime  = strtoul (p, &p, 0);
    buf->stime  = strtoul (p, &p, 0);

    for (i = 0; i < GLIBTOP_NCPU; i++) {
	if (strncmp (p+1, "cpu", 3) || !isdigit (p [4]))
	    break;

	p += 6;
	buf->xcpu_utime [i] = strtoul (p, &p, 0);
	buf->xcpu_stime [i] = strtoul (p, &p, 0);
    }

    buf->flags |= _glibtop_sysdeps_proc_time_smp;

    return 0;
}