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/*	$Id$	*/
/*
 * Copyright (c) 2004 Dimitri Sokolyuk <demon@vhost.dymdns.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <curses.h>
#include "main.h"
#define ASTAT 30
#define XPOS 10
extern int LINES;

u_long delta(u_long, u_long *);
void av(u_long, u_long, u_int);
u_int getmax(u_long *);

u_long ani[ASTAT];
u_long ano[ASTAT];
u_long api[ASTAT];
u_long apo[ASTAT];
u_long ilast = 0, olast = 0;

int out(struct ifdata *diff) {
    extern struct ifdata ifdata;
    u_long dli, dlo;
    WINDOW *scr;

    move(0,0);

    dli = delta(diff->ibytes, ani);
    dlo = delta(diff->obytes, ano);

    mvprintw(LINES / 3 - 1, XPOS,
	"/0   /.1  /.2  /.3  /.4  /.5  /.6  /.7  /.8  /.9  /1 x %3lu kBps\n",
	getmax(ani) / 1024);
    mvprintw(LINES / 3, XPOS - 3,
	"RX ---------------------------------------------------    %3lu kBps\n",
	diff->ibytes / 1024);
    move(LINES / 3, XPOS);
    av(diff->ibytes / 1024, ilast, getmax(ani) / 1024);

    mvprintw(2 * LINES / 3 - 1, XPOS,
	"/0   /.1  /.2  /.3  /.4  /.5  /.6  /.7  /.8  /.9  /1 x %3lu kBps\n",
	getmax(ano) / 1024);
    mvprintw(2 * LINES / 3, XPOS - 3,
    	"TX ---------------------------------------------------    %3lu kBps\n",
	diff->obytes / 1024);
    move(2 * LINES / 3, XPOS);
    av(diff->obytes / 1024, olast, getmax(ano) / 1024);

    ilast = diff->ibytes / 1024;
    olast = diff->obytes / 1024;

    refresh();
}

u_long delta(u_long n, u_long *an) {
    u_long nsum = 0;
    int i, del = ASTAT;
    for (i=ASTAT - 1; i>0; i--) {
	an[i] = an[i-1];
	nsum += an[i];
	if (an[i] == 0)
	    del -= 1;
    }
    an[0] = n;
    nsum += n;
    return (nsum / del);
}

void av(u_long bytes, u_long avbytes, u_int max) {
    u_int b, avb, i, min;
    if (max != 0) {
	b = bytes * 50 / max;
	avb = avbytes * 50 / max;
	min = (b < avb)?b:avb;
	if (b != 0 || avb != 0) {
	    for (i = 0; i < min; i++)
		addch('=');
	    if (b < avb)
    		for (i = min; i <= avb; i++)
		    addch(ACS_LARROW);
	    else if (b > avb)
    		for (i = min; i <= b; i++)
		    addch(ACS_RARROW);
	    else
		addch('=');
	}
    }
}

u_int getmax(u_long *an) {
    int i;
    u_int max = 0;
    for (i=0; i<ASTAT; i++) {
	if(an[i] > max)
	    max = an[i];
    }
    return max;
}