worm.c

TCP-IP红宝书源代码

/* worm.c -- worm, worm2, playgame */
/* simple Xinu worm game by Shawn Ostermann */    

#include <conf.h>
#include <kernel.h>
#include <io.h>
#include <tty.h>
#include "game.h"
    
int mover(), plotter(), targeter(), referee(), robot();

int wormx, wormy;

int targetx, targety;

int worm2();

int pidmover, pidplotter, pidtargeter, pidreferee, pidmain, pidtimer, pidrobot;
int pids, pidr;

worm()
{
    resume(create(worm2,5000,20,"worm2",0));
}

worm2()
{
    terminit();
    msginit();

    while (TRUE) {
	playgame();
	clearscreen();
    }
}


playgame()
{
    int x,y;
    int l;

    pidmain = getpid();
    targetx = 0;
    targety = 0;

    resume(pidplotter = create(plotter,2000,50,"plotter",0));
    
    /* draw the border */
    for (l=1; l<=(XMAXFIELD/2)+1; ++l) {
	x = l;
	if (x>1) {
	    newsend(pidplotter,3,x,YMAXFIELD,'=');
	    newsend(pidplotter,3,x,1,'=');
	    newsend(pidplotter,3,XMAXFIELD-x+1,YMAXFIELD,'=');
	    newsend(pidplotter,3,XMAXFIELD-x+1,1,'=');
	}
	y = (l%3==0)?(l/3):YMAXFIELD;
	if (y<=(YMAXFIELD/2)) {
	    newsend(pidplotter,3,XMAXFIELD,y,'|');
	    newsend(pidplotter,3,1,y,'|');
	    newsend(pidplotter,3,XMAXFIELD,YMAXFIELD-y+1,'|');
	    newsend(pidplotter,3,1,YMAXFIELD-y+1,'|');
	}
    }

    resume(pidmover = create(mover,5000,12,"mover",0));
    resume(pidtargeter = create(targeter,5000,11,"targeter",0));
    resume(pidreferee = create(referee,5000,5,"referee",0));
    sleep10(1);
    resume(pidrobot = create(robot,5000,10,"robot",0));

    receive();
    kill(pidmover);
    kill(pidtargeter);
    kill(pidreferee);
    kill(pidtimer);
    kill(pidrobot);
    kill(pids);
    kill(pidr);
    printstring("Hit a wall!!!",XMAXFIELD/2-5,YMAXFIELD/2);
    sleep(2);
    kill(pidplotter);
}