sdlbomber/bomber.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <signal.h>
#include "bomber.h"
#include "gfx.h"
#include "announce.h"
#include "sound.h"
#include <fcntl.h>
#include <stdarg.h>

static void domode(void);
static int iterate(void);
static int scaninvite(int size);

#define FRACTION 9
#define MAXMSG 4096
#define PORT 5521
#define SPEEDDELTA (1<<(FRACTION-1))
#define SPEEDMAX (10<<FRACTION)
#define SPEEDSTART (6<<FRACTION)
#define SPEEDTURTLE (3<<FRACTION)
#define SPEEDTURTLE_TIMEOUT 250

#define TEMPNODES 2


/* Animation specific #defines */
#define NUMBOMBFRAMES 10
#define NUMWALKFRAMES 60
#define NUMFLAMEFRAMES 80
#define NUMDEATHFRAMES 41
#define NUMCHARACTERS 50

#define MASTER 1
#define SLAVE 2

static unsigned char mesg[MAXMSG]="";
uchar needwhole=0;
static int gameframe;
static int netframe;
static int mydatacount;
static int myslot;
static int network;

static char *remapstring="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ.:!?\177/\\*-,>< =";

gfxset gfxsets[NUMGFX];
static char walkingname[256];
static char colorsetname[256];
static char backgroundname[256];
static char blocksname[256];
static char blocksxname[256];
static char bombs1name[256];
static char bombs2name[256];
static char flamesname[256];
static char tilesname[256];
static char deathname[256];
static char fontname[256];
static char bigfontname[256];

#define REGISTERLEN (1+4+4+4+16+1)

static char asciiremap[256];

figure walking[MAXSETS][NUMWALKFRAMES];
static solid background,backgroundoriginal;
static figure blocks[3];
static figure blocksx[9];
static figure bombs1[MAXSETS][NUMBOMBFRAMES];
static figure bombs2[MAXSETS][NUMBOMBFRAMES];
static figure flamefigs[MAXSETS][NUMFLAMEFRAMES];
static figure tiles[15];
static figure death[NUMDEATHFRAMES];
static figure font[NUMCHARACTERS];
static figure bigfont[NUMCHARACTERS];

int fontxsize,fontysize;
int textx,texty;
static int bigfontxsize,bigfontysize,bigfontyspace;

/* On screen array variables */
static int arraynumx=15;
static int arraynumy=11;
static int arraystartx=20;
static int arraystarty=70;
static int arrayspacex=40;
static int arrayspacey=36;

/* The playfield array, contains FIELD_* equates */
unsigned char field[32][32];
void *info[32][32];

static void *things=0;
static int thingsize,thingnum;

static list activebombs;
static list activedecays;
static list activebonus;
static list activegeneric;

static bomb *detonated[MAXBOMBSDETONATED];
static int detonateput=0;
static int detonatetake=0;

static list activeflames;
static list activeplayers;

static int dopcx(char *name,gfxset *gs);

sprite sprites[MAXSPRITES];
static int spritesused=0;

static int hc=0;
static char interrupted=0;
static int gamemode;
char exitflag=0;
static int framecount=0;

static unsigned char regpacket[64];
static uint32_t unique;
static unsigned char gameversion[4]={0xda,0x01,0x00,0x04};
static char playername[16];

static char havepulse=0;

#define MAXNETNODES 10


struct netnode {
	struct sockaddr_in netname;
	char name[16];
	char used;
	unsigned char unique[4];
};

static struct netnode netnodes[64];


static int numnetnodes=0;
static int myaction;
static unsigned char actions[MAXNETNODES];


static int udpsocket=-1;
static struct sockaddr_in myname={0},mastername={0};
static socklen_t senderlength;
static struct sockaddr_in sender={0};

static unsigned char configopts[]={2,1,0,2,0,0,0,0,0};

static Uint32 gtime() {
	return SDL_GetTicks();
}

static Uint32 longtime(void) {
	return gtime()/1000;
}

#define TAP1 250
#define TAP2 103
/*
#define TAP1 55
#define TAP2 31
*/

static unsigned char myrandblock[TAP1];
static int myrandtake;

static int myrand1(void) {
	int i;
	int val;

	i=myrandtake-TAP2;
	if(i<0) i+=TAP1;
	val=myrandblock[myrandtake++]^=myrandblock[i];
	if(myrandtake==TAP1) myrandtake=0;
	return val;
}
static int myrand(void) {
	int v;
	v=myrand1();
	return (v<<8) | myrand1();
}

static void initmyrand() {
	int i,j;
	unsigned char *p;
	int msb,msk;

	myrandtake=0;
	p=myrandblock;
	j=12345 ^ unique;
	i=TAP1;
	while(i--) {
		j=(j*1277)&0xffff;
		*p++=j>>8;
	}
	p=myrandblock+14;
	msk=0xff;
	msb=0x80;
	do {
		*p&=msk;
		*p|=msb;
		p+=11;
		msk>>=1;
		msb>>=1;
	} while(msk);
	i=500;
	while(i--) myrand();

}

#if defined (TEST_LATENCY)
#define NUMQ 512
struct message {
	int time;
	struct sockaddr_in *to;
	int tosize;
	unsigned char msg[512];
	int len;
} message[NUMQ]={0};


outmsgs() {
	int i;

	for(i=0;i<NUMQ;++i) {
		if(message[i].time) {
			--message[i].time;
			if(message[i].time) continue;
			sendto(udpsocket,message[i].msg,message[i].len,0,
				message[i].to,sizeof(struct sockaddr_in));
		}
	}
}
#endif

static int putmsg(struct sockaddr_in *toname,unsigned char *msg,int len) {
	int status;

#if defined (TEST_LATENCY)
	int i;

	for(i=0;i<NUMQ;++i) {
		if(!message[i].time) {
			message[i].time=10;
			message[i].to=toname;
			memcpy(message[i].msg,msg,len);
			message[i].len=len;
			break;
		}
	}
	return 0;
#else
	status=sendto(udpsocket,msg,len,0,
		(struct sockaddr *)toname,sizeof(struct sockaddr_in));
	return status;
#endif

}

int getmsg(int msec) {
	int size;

	memset(&sender,0,sizeof(sender));
	senderlength=sizeof(sender);
	if(msec) {
		struct timeval timeout;
		fd_set readfds;
		int res;

		memset(&timeout,0,sizeof(timeout));
		timeout.tv_sec=msec/1000;
		timeout.tv_usec=(msec%1000)*1000;
		FD_ZERO(&readfds);
		FD_SET(udpsocket,&readfds);
		res=select(udpsocket+1,&readfds,0,0,&timeout);
		if(res<=0) return -1;
	}
	size=recvfrom(udpsocket,mesg,MAXMSG,0,
		(struct sockaddr *)&sender,&senderlength);
	return size;
}

static int isvalidmsg() {
	int i;
	void *host;
	void *port;

	if(memcmp(mesg+1,regpacket+1,4)) return -1;
	host=&sender.sin_addr.s_addr;
	port=&sender.sin_port;
	for(i=1;i<MAXNETNODES;++i)
		if(netnodes[i].used && 
				!memcmp(&netnodes[i].netname.sin_addr.s_addr,host,4) &&
				!memcmp(&netnodes[i].netname.sin_port,port,2))
			return i;
	return -1;
}

static long longind(unsigned char *p) {
	return (p[0]<<24L) | (p[1]<<16L) | (p[2]<<8) | p[3];
}

static int tovideox(int x) {
	return (x>>FRACTION)+arraystartx;
}

static int tovideoy(int y) {
	return (y>>FRACTION)+arraystarty;
}

#define SGN(x) ((x)==0 ? 0 : ((x)<0 ? -1 : 1))

static int screentoarrayx(int x) {
	x+=arrayspacex << (FRACTION+2);
	return ((x>>FRACTION)+(arrayspacex>>1))/arrayspacex-4;
}

static int screentoarrayy(int y) {
	y+=arrayspacey << (FRACTION+2);
	return ((y>>FRACTION)+(arrayspacey>>1))/arrayspacey-4;
}

static int arraytoscreenx(int x) {
	return arrayspacex*x<<FRACTION;
}

static int arraytoscreeny(int y) {
	return arrayspacey*y<<FRACTION;
}


#define ACTIONHIST 20
unsigned char hist[ACTIONHIST][MAXNETNODES];
int actionput,actioncount,mycount,gountil;
unsigned char actionblock[ACTIONHIST*MAXNETNODES];

static void addactions(void) {
	memmove(hist[actionput],actions,MAXNETNODES);
	++actionput;
	if(actionput==ACTIONHIST)
		actionput=0;
	++actioncount;
}

static void buildactions(void) {
	unsigned char *p;
	int i,j;
	p=actionblock;
	i=0;
	while(i<20) {
		if(actioncount-i>0) {
			j=actionput-i-1;
			if(j<0) j+=ACTIONHIST;
			memmove(p,hist[j],MAXNETNODES);
		} else {
			memset(p,0,MAXNETNODES);
		}
		p+=MAXNETNODES;
		++i;
	}
}

static void sendactions(int which) {
	unsigned char msg[512];

	*msg = PKT_STEP;
	memmove(msg+1,regpacket+1,4);
	msg[5]=actioncount>>24L;
	msg[6]=actioncount>>16L;
	msg[7]=actioncount>>8L;
	msg[8]=actioncount;
	memcpy(msg+9,actionblock,MAXNETNODES*ACTIONHIST);
	putmsg(&netnodes[which].netname,msg,MAXNETNODES*ACTIONHIST+9);
}

static void sendmine(int frame) {
	unsigned char msg[64];

	*msg = PKT_MYDATA;
	memmove(msg+1,regpacket+1,4);
	msg[5]=frame>>24L;
	msg[6]=frame>>16L;
	msg[7]=frame>>8L;
	msg[8]=frame;
	msg[9]=myaction;
	putmsg(&mastername,msg,10);
}

static int informsize;

static void buildinform(unsigned char type) {
	unsigned char *put;
	int i;

	put=mesg;
	*put++=type;
	memmove(put,regpacket+1,4);
	put+=4;
	++put; // slot specific for each slave
	for (i = 0; i < MAXNETNODES; ++i) {
		if(!netnodes[i].used) continue;
		*put++=i;
		memmove(put,netnodes[i].name,16);
		put+=16;
	}
	*put++=0xff;
	memcpy(put, configopts, sizeof(configopts));
	put += sizeof(configopts);
	informsize=put-mesg;
}

static void inform1(int which) {
	mesg[5]=which;
	putmsg(&netnodes[which].netname,mesg,informsize);
}

static void inform(unsigned char type) {
	int i;
	buildinform(type);
	for(i=1;i<MAXNETNODES;++i)
		if(netnodes[i].used)
			inform1(i);
}

unsigned char latestactions[MAXNETNODES];
long latestcounts[MAXNETNODES];

static int networktraffic(void) {
	int i;
	int length;
	int whosent;
	unsigned char newactions[MAXNETNODES];
	long now;
	long count;

	if(!network) return -1;
	if(network==MASTER) {
		memcpy(newactions,latestactions,MAXNETNODES);
		newactions[0]=myaction;
		now=gtime();
		for(;;) {
			if(netframe && gtime()-now>15) break;
			if(!netframe && gtime()-now>=2000) {
				for(i=1;i<MAXNETNODES;++i) {
					buildinform(PKT_BEGIN);
					inform1(i);
				}
				break;
			}
			length=getmsg(5);
			if(length>0 && *mesg!=PKT_MYDATA) printf("Strange packet %d\n",*mesg);
// check for unexpected old packets...
// for example JOIN on frame 0, respond with BEGIN if player already in game
// respond with uninvite INVITE on JOIN from others
			if(length<10) continue;
			whosent=isvalidmsg();
			if(whosent<=0) continue;
			count=longind(mesg+5);
			if(count>latestcounts[whosent]) {
				latestcounts[whosent]=count;
				newactions[whosent]=mesg[9];
			}
		}
		if(myaction==ACT_QUIT) {
			for(i=1;i<MAXNETNODES;++i)
				if(netnodes[i].used)
					newactions[i]=ACT_QUIT;
		}

		memmove(actions,newactions,sizeof(actions));
		addactions();
		buildactions();
		for(i=1;i<MAXNETNODES;++i)
			if(netnodes[i].used)
				sendactions(i);
		for(i=1;i<MAXNETNODES;++i)
			if(netnodes[i].used && actions[i]==ACT_QUIT)
				netnodes[i].used=0;
		++netframe;
		return actioncount;
	} else { /* slave */
		long latest=-1;
		long lastsent;

		lastsent=now=gtime();
		++mydatacount;
		sendmine(mydatacount);
		for(;;) {
/*
			if(gtime()-lastsent>=1)
			{
				lastsent=gtime();
				sendmine(mydatacount);
			}
*/
			if(latest>=0 && gtime()-now>3) break;
			length=getmsg(3);
			if(length==MAXNETNODES*ACTIONHIST+9 && 
					sender.sin_addr.s_addr==mastername.sin_addr.s_addr &&
					sender.sin_port==mastername.sin_port) {
				i=longind(mesg+5);
				if(i<latest) continue;
				latest=i;
				memmove(actionblock,mesg+9,MAXNETNODES*ACTIONHIST);
			}
		}
		++netframe;
		return latest;
	}
}

int winsock=0;

static void getsocket(void) {
	int status;
	socklen_t slen = sizeof(myname);
#if defined(__WIN32__) || defined(WIN32)
char dummydata[128];

	if(WSAStartup(0x0101,(void *)dummydata)) {
		printf("Windows dumped\n");
		exit(1);
	}
	winsock=1;
#endif

	udpsocket=socket(PF_INET,SOCK_DGRAM,IPPROTO_UDP);
	if(udpsocket==-1) {
		perror("socket()");
		exit(1);
	}
	memset(&myname,0,sizeof(myname));
	myname.sin_family=AF_INET;
	myname.sin_addr.s_addr=htonl(INADDR_ANY);
	myname.sin_port=htons(0);
	status=bind(udpsocket,(struct sockaddr *) &myname,sizeof(myname));
	if(-1 == status) {
		perror("bind()");
		exit(1);
	}
	status = getsockname(udpsocket, (struct sockaddr *) &myname, &slen);
	if(-1 == status) {
		perror("getsockname()");
		exit(1);
	}
}

static void freesocket(void) {
#if defined(__WIN32__) || defined(WIN32)
	if(!winsock) return;
	WSACleanup();
#endif
}

static void freegfxset(gfxset *gs)
{
	if(gs->gs_pic) free(gs->gs_pic);
	gs->gs_pic=0;
}

static void nomem(char *str)
{
	printf("No memory!!![%s]\n",str);
	exit(1);
}


static void getgroup(char *name,gfxset *colorgs,figure *fig,int count)
{
int err;
int i;
gfxset gs;

	err=dopcx(name,&gs);
	if(err) exit(1000+err);
	createinout(&gs);
	for(i=0;i<MAXSETS;++i,fig+=count,++colorgs)
	{
		if(!colorgs->gs_pic) continue;
		memmove(gs.gs_colormap,colorgs->gs_colormap,
			sizeof(gs.gs_colormap));
		createinout(&gs);
		gfxfetch(&gs,fig,count);
	}
	freegfxset(&gs);
}
static void getsingle(char *name,figure *fig,int count)
{
gfxset gs;
int err;
	err=dopcx(name,&gs);
	if(err) exit(1000+err);
	createinout(&gs);
	gfxfetch(&gs,fig,count);
	freegfxset(&gs);
}
static void loadfonts(void)
{
int i,j;
char *p;

	getsingle(fontname,font,NUMCHARACTERS);
	getsingle(bigfontname,bigfont,NUMCHARACTERS);
	fontxsize=8;
	fontysize=12;
	bigfontxsize=16;
	bigfontysize=24;
	bigfontyspace=32;
	p=remapstring;
	j=0;while(*p && *p!=' ') ++p,++j;
	memset(asciiremap,j,sizeof(asciiremap));
	p=remapstring;
	i=0;
	while(*p && i<40)
		asciiremap[(int)*p++]=i++;
}

static void loadgfx()
{
gfxset *gs;
gfxset *colorgs;
int err;
int i;
char name[256];

	strcpy(walkingname,"walk");
	strcpy(colorsetname,"pal");
	strcpy(backgroundname,"field0");
	strcpy(blocksname,"blocks3");
	strcpy(blocksxname,"blocks3x");
	strcpy(bombs1name,"bomb1");
	strcpy(bombs2name,"bomb2");
	strcpy(flamesname,"flames");
	strcpy(tilesname,"tiles");
	strcpy(deathname,"death1");
	strcpy(fontname,"font");
	strcpy(bigfontname,"bigfont");

	gs=malloc((MAXSETS+1)*sizeof(gfxset));
	if(!gs)
		nomem("loadgfx");
	colorgs=gs+1;

	for(i=0;i<MAXSETS;++i)
	{
		sprintf(name,"%s%d",colorsetname,i);
		err=dopcx(name,colorgs+i);
		if(err) continue;
	}

	loadfonts();
	texthome();
	bigscrprintf("Loading graphics...\n");

	err=dopcx(backgroundname,gs);
	if(err) exit(1000+err);
	createinout(gs);
	solidfetch(gs,&background);
	solidfetch(gs,&backgroundoriginal);
	freegfxset(gs);

	bigscrprintf("Loading blocks\n");
	getsingle(blocksname,blocks,3);
	bigscrprintf("Loading block explosions\n");
	getsingle(blocksxname,blocksx,9);
	bigscrprintf("Loading walking figures\n");
	getgroup(walkingname,colorgs,walking[0],NUMWALKFRAMES);
	bigscrprintf("Loading normal bombs\n");
	getgroup(bombs1name,colorgs,bombs1[0],NUMBOMBFRAMES);
	bigscrprintf("Loading controlled bombs\n");
	getgroup(bombs2name,colorgs,bombs2[0],NUMBOMBFRAMES);
	bigscrprintf("Loading flames\n");
//	getgroup(flamesname,colorgs,flamefigs[0],NUMFLAMEFRAMES);
	getsingle(flamesname,flamefigs[0],NUMFLAMEFRAMES);
	bigscrprintf("Loading bonus tiles\n");
	getsingle(tilesname,tiles,15);
	bigscrprintf("Loading death sequence\n");
	getsingle(deathname,death,NUMDEATHFRAMES);

	for(i=0;i<MAXSETS;++i)
		freegfxset(colorgs+i);
	free(gs);
	bigscrprintf("Done loading graphics\n");
}

void texthome(void)
{
	textx=texty=10;
}

static void update(void)
{
	copyup();
}


void scrprintf(char *str,...)
{
char output[256],*p,*p2;
va_list ap;

	va_start(ap, str);

	vsprintf(output,str,ap);
	p=output;
	for(;;)
	{
		p2=p;
		while(*p2 && *p2!='\n') ++p2;
		if(*p2)
		{
			*p2=0;
			drawstring(textx,texty,p);
			texty+=fontysize;
			textx=10;
			p=p2+1;
		} else
		{
			drawstring(textx,texty,p);
			textx+=fontxsize*(p2-p);
			break;
		}
	}
	update();
}
void bigscrprintf(char *str,...)
{
char output[256],*p,*p2;
va_list ap;

	va_start(ap, str);
	vsprintf(output,str,ap);
	p=output;
	for(;;)
	{
		p2=p;
		while(*p2 && *p2!='\n') ++p2;
		if(*p2)
		{
			*p2=0;
			drawbigstring(textx,texty,p);
			texty+=bigfontysize;
			textx=10;
			p=p2+1;
		} else
		{
			drawbigstring(textx,texty,p);
			textx+=bigfontxsize*(p2-p);
			break;
		}
	}
	update();
}
static void centerbig(int y,char *str)
{
int w;

	w=strlen(str)*bigfontxsize;
	drawbigstring((IXSIZE-w)>>1,y,str);
}

static void addsprite(int x,int y,figure *fig)
{
sprite *sp;
	if(spritesused==MAXSPRITES) return;
	sp=sprites+spritesused++;
	sp->flags=0;
	sp->xpos=x;
	sp->ypos=y;
	sp->fig=fig;
}

void drawstring(int xpos,int ypos,char *str)
{
char ch;

	while((ch=*str++))
	{
		drawfigure(xpos,ypos,font+asciiremap[toupper(ch)]);
		xpos+=fontxsize;
	}
}
void drawbigstring(int xpos,int ypos,char *str)
{
char ch;

	while((ch=*str++))
	{
		drawfigure(xpos,ypos,bigfont+asciiremap[toupper(ch)]);
		xpos+=bigfontxsize;
	}
}


#define IBUFFLEN 1024
int ileft=0,ihand=0,byteswide;
unsigned char ibuff[IBUFFLEN],*itake;

static int myci()
{
	if(!ileft)
	{
		ileft=read(ihand,ibuff,IBUFFLEN);

		if(!ileft) return -1;
		itake=ibuff;
	}
	ileft--;
	return *itake++;
}


static int dopcxreal(char *name,gfxset *gs)
{
int xs,ys;
int i,j,k;
int totalsize;
int width,height;
unsigned char *bm,*lp;
char tname[256];


	memset(gs,0,sizeof(gfxset));
	ileft=0;
	sprintf(tname,DATADIR "/%s",name);
	ihand=open(tname,O_RDONLY);
	if(ihand<0)
	{
		char tname2[256];
		sprintf(tname2,"%s.pcx",tname);
		ihand=open(tname2,O_RDONLY);
		if(ihand<0)
			return 1;
	}
	if(myci()!=10) {close(ihand);return 2;} // 10=zsoft .pcx
	if(myci()!=5) {close(ihand);return 3;} // version 3.0
	if(myci()!=1) {close(ihand);return 4;} //encoding method
	if(myci()!=8) {close(ihand);return 5;} //bpp
	xs=myci();
	xs|=myci()<<8;
	ys=myci();
	ys|=myci()<<8;
	width=myci();
	width|=myci()<<8;
	height=myci();
	height|=myci()<<8;
	width=width+1-xs;
	height=height+1-ys;
	for(i=0;i<48+4;++i) myci();
	myci();
	if(myci()!=1) {close(ihand);return 6;} // # of planes
	byteswide=myci();
	byteswide|=myci()<<8;
	i=myci();
	i|=myci()<<8;
//	if(i!=1) {close(ihand);return 7;} // 1=color/bw,2=grey
	for(i=0;i<58;++i) myci();
	totalsize=height*byteswide;
	bm=malloc(totalsize+1);
	if(!bm) {close(ihand);return 8;} // no memory
	gs->gs_pic=bm;
	gs->gs_xsize=width;
	gs->gs_ysize=height;
	while(height--)
	{
		lp=bm;
		i=byteswide;
		while(i>0)
		{
			j=myci();
			if(j<0xc0)
			{
				*lp++=j;
				--i;
			} else
			{
				j&=0x3f;
				k=myci();
				while(j-- && i)
				{
					*lp++=k;
					--i;
				}
			}
		}
		bm+=width;
	}
	lseek(ihand,-0x300,SEEK_END);
	read(ihand,gs->gs_colormap,0x300);
	close(ihand);
	return 0;
	
}

int dopcx(char *name,gfxset *gs)
{
int err;
	err=dopcxreal(name,gs);
	if(err)
		printf("Error loading \"%s\":code %d\n",name,err);
	return err;
}



static void addflame(player *owner,int px,int py)
{
flame *fl,*fl2;

	fl=allocentry();
	if(!fl) return;
	addtail(&activeflames,fl);
	field[py][px]=FIELD_FLAME;
	info[py][px]=fl;
	fl->px=px;
	fl->py=py;
	fl->xpos=arraytoscreenx(px);
	fl->ypos=arraytoscreeny(py);
	fl->owner=owner;
	if(px && field[py][px-1]==FIELD_FLAME)
	{
		fl2=info[py][px-1];
		fl->lurd|=FL_LEFT;
		fl2->lurd|=FL_RIGHT;
	}
	if(py && field[py-1][px]==FIELD_FLAME)
	{
		fl2=info[py-1][px];
		fl->lurd|=FL_UP;
		fl2->lurd|=FL_DOWN;
	}
	if(px<arraynumx-1 && field[py][px+1]==FIELD_FLAME)
	{
		fl2=info[py][px+1];
		fl->lurd|=FL_RIGHT;
		fl2->lurd|=FL_LEFT;
	}
	if(py<arraynumy-1 && field[py+1][px]==FIELD_FLAME)
	{
		fl2=info[py+1][px];
		fl->lurd|=FL_DOWN;
		fl2->lurd|=FL_UP;
	}
}

void dropbomb(player *pl,int px,int py,int type)
{
bomb *bmb;

	if(field[py][px]!=FIELD_EMPTY) return;
	bmb=allocentry();
	if(!bmb) return;
	playsound(3);
	addtail(&activebombs,bmb);

	--(pl->bombsavailable);
	field[py][px]=FIELD_BOMB;
	info[py][px]=bmb;
	bmb->type=type;
	bmb->px=px;
	bmb->py=py;
	bmb->xpos=arraytoscreenx(px);
	bmb->ypos=arraytoscreeny(py);
	bmb->power=pl->flamelength;
	bmb->owner=pl;
}

static void processbombs()
{
bomb *bmb;
	bmb=activebombs.next;
	while(bmb)
	{
		switch(bmb->type)
		{
		case BOMB_NORMAL:
			++bmb->timer;
			if(bmb->timer==BOMBLIFE)
				adddetonate(bmb);
			++(bmb->figcount);
			break;
		case BOMB_CONTROLLED:
			++(bmb->figcount);
			break;
		}
		bmb=bmb->next;
	}
}
void adddetonate(bomb *bmb)
{
	if(bmb->type==BOMB_OFF) return;
	bmb->type=BOMB_OFF;
	field[bmb->py][bmb->px]=FIELD_EXPLODING;
	info[bmb->py][bmb->px]=0;
	detonated[detonateput++]=bmb;
	detonateput%=MAXBOMBSDETONATED;
}
void flameshaft(player *owner,int px,int py,int dx,int dy,int power)
{
int there;
bomb *bmb;
	while(power--)
	{
		px+=dx;
		py+=dy;
		if(px<0 || py<0 || px>=arraynumx || py>=arraynumy) break;
		there=field[py][px];
		switch(there)
		{
		case FIELD_BOMB:
			bmb=info[py][px];
			adddetonate(bmb);
			break;
		case FIELD_EMPTY:
			addflame(owner,px,py);
			break;
		case FIELD_BRICK:
			adddecay(px,py);
			power=0;
			break;
		case FIELD_BONUS:
			deletebonus(info[py][px]);
			power=0;
			break;
		case FIELD_BORDER:
		case FIELD_EXPLODING:
		default:
			power=0;
		case FIELD_FLAME:
			break;
		}
	}

}
void detonatebomb(bomb *bmb)
{
int px,py;
int power;
player *owner;

	++(bmb->owner->bombsavailable);
	px=bmb->px;
	py=bmb->py;
	power=bmb->power;
	owner=bmb->owner;
	delink(&activebombs,bmb);
	addflame(owner,px,py);
	flameshaft(owner,px,py,-1,0,power);
	flameshaft(owner,px,py,0,-1,power);
	flameshaft(owner,px,py,1,0,power);
	flameshaft(owner,px,py,0,1,power);
}
static void dodetonations(void)
{
int i=0;
	while(detonatetake!=detonateput)
	{
		++i;
		detonatebomb(detonated[detonatetake]);
		detonatetake=(detonatetake+1) % MAXBOMBSDETONATED;
	}
	if(i) playsound((myrand()&1) ? 0 : 4);
}

static void drawbombs(void)
{
int j;
bomb *bmb;
struct figure *figtab;
int color;
int xpos,ypos;

	bmb=activebombs.next;
	while(bmb)
	{
		color=bmb->owner->color;
		figtab=(bmb->type==BOMB_NORMAL) ? bombs1[color] : bombs2[color];
		j=bmb->figcount % (NUMBOMBFRAMES<<1);
		if(j>=NUMBOMBFRAMES) j=(NUMBOMBFRAMES<<1)-j-1;
		xpos=tovideox(bmb->xpos);
		ypos=tovideoy(bmb->ypos)-3;

		addsprite(xpos,ypos,figtab+j);
		bmb=bmb->next;
	}
}
static void processflames(void)
{
flame *fl,*fl2;
	fl=activeflames.next;
	while(fl)
	{
		++(fl->timer);
		fl=fl->next;
	}
	fl=activeflames.next;
	while(fl)
	{
		if(fl->timer==FLAMELIFE)
		{
			field[fl->py][fl->px]=FIELD_EMPTY;
			info[fl->py][fl->px]=0;
			fl2=fl;
			fl=fl->next;
			delink(&activeflames,fl2);
		} else
			fl=fl->next;
	}
}
static void drawflames(void)
{
flame *fl;
int xpos,ypos;
int color;
int fig;

	fl=activeflames.next;
	while(fl)
	{
		color=fl->owner->color;
		xpos=tovideox(fl->xpos);
		ypos=tovideoy(fl->ypos);
		fig=(fl->timer*10)/FLAMELIFE;
		if(fig>=5) fig=9-fig;
		fig+=5*fl->lurd;
		addsprite(xpos,ypos,flamefigs[0/* color */]+fig);
		fl=fl->next;
	}
}
void adddecay(int px,int py)
{
brickdecay *bd;
int xpos,ypos;
	bd=allocentry();
	if(!bd) return;
	field[py][px]=FIELD_EXPLODING;
	bd->xpos=arraytoscreenx(px);
	bd->ypos=arraytoscreeny(py);
	bd->px=px;
	bd->py=py;
	addtail(&activedecays,bd);
	xpos=tovideox(bd->xpos);
	ypos=tovideoy(bd->ypos);
	solidcopyany(&backgroundoriginal,&background,xpos,ypos,
		arrayspacex,arrayspacey);
	solidcopy(&background,xpos,ypos,arrayspacex,arrayspacey);

}
static void processdecays()
{
brickdecay *bd,*bd2;

	bd=activedecays.next;
	while(bd)
	{
		++(bd->timer);
		if(bd->timer==DECAYLIFE)
		{
			field[bd->py][bd->px]=FIELD_EMPTY;
			trybonus(bd->px,bd->py);
			bd2=bd;
			bd=bd->next;
			delink(&activedecays,bd2);
		} else
			bd=bd->next;
	}
}

static void drawdecays()
{
brickdecay *bd;

	bd=activedecays.next;
	while(bd)
	{
		addsprite(tovideox(bd->xpos),tovideoy(bd->ypos),
			blocksx+(bd->timer*9)/DECAYLIFE);
		bd=bd->next;
	}
}
int bonustotal;
int bonuschances[]=
{
TILE_BOMB,20,
TILE_FLAME,20,
TILE_CONTROL,2,
TILE_GOLDFLAME,2,
TILE_SKATES,20,
TILE_TURTLE,5,
TILE_NONE,160
};
void trybonus(int px,int py)
{
int i=0, *p,r;

	if(field[py][px]!=FIELD_EMPTY) return;
	p=bonuschances;
	r=myrand()%bonustotal;
	while(r>=0)
	{
		i=*p++;
		r-=*p++;
	}
	if(i==TILE_NONE) return;
	addbonus(px,py,i);
}
void deletebonus(bonustile *bonus)
{
int px,py;
	px=bonus->px;
	py=bonus->py;
	field[py][px]=0;
	info[py][px]=0;
	delink(&activebonus,bonus);
}
void addbonus(int px,int py,int type)
{
bonustile *bonus;
	bonus=allocentry();
	if(!bonus) return;
	addtail(&activebonus,bonus);
	bonus->px=px;
	bonus->py=py;
	bonus->xpos=arraytoscreenx(px);
	bonus->ypos=arraytoscreeny(py);
	bonus->type=type;
	field[py][px]=FIELD_BONUS;
	info[py][px]=bonus;
}
static void drawbonus()
{
bonustile *bonus;
	bonus=activebonus.next;
	while(bonus)
	{
		addsprite(tovideox(bonus->xpos),tovideoy(bonus->ypos),
			tiles+bonus->type);
		bonus=bonus->next;
	}
}

static void drawplayers()
{
player *pl;
int xpos,ypos;
	pl=activeplayers.next;

	while(pl)
	{
		if(!(pl->flags & FLG_DEAD))
		{
			if(!pl->figure)
				pl->figure=walking[pl->color]+30;
			xpos=tovideox(pl->xpos)+pl->fixx;
			ypos=tovideoy(pl->ypos)+pl->fixy;
			addsprite(xpos,ypos,pl->figure);
		}
		pl=pl->next;
	}
}
static void detonatecontrolled(player *pl)
{
bomb *bmb;
	bmb=activebombs.next;
	while(bmb)
	{
		if(bmb->owner==pl && bmb->type==BOMB_CONTROLLED)
			adddetonate(bmb);
		bmb=bmb->next;
	}
}
void killplayer(player *pl)
{
	pl->flags|=FLG_DEAD;
	playsound(2);
	adddeath(pl);
	detonatecontrolled(pl);
}
void adddeath(player *pl)
{
int xpos,ypos;
	xpos=tovideox(pl->xpos)+pl->fixx-10;
	ypos=tovideoy(pl->ypos)+pl->fixy;
	queuesequence(xpos,ypos,death,NUMDEATHFRAMES);
}
void queuesequence(int xpos,int ypos,figure *fig,int count)
{
generic *gen;
	gen=allocentry();
	if(!gen) return;
	gen->xpos=xpos;
	gen->ypos=ypos;
	gen->data1=count;
	gen->process=playonce;
	gen->draw=drawgeneric;
	gen->ptr1=fig;
	addtail(&activegeneric,gen);
}
void playonce(generic *gen)
{
	if(gen->timer==gen->data1)
		delink(&activegeneric,gen);
}
void drawgeneric(generic *gen)
{
	addsprite(gen->xpos,gen->ypos,((figure *)(gen->ptr1))+gen->timer);
}

void processgenerics(void)
{
generic *gen,*gen2;
	gen=activegeneric.next;
	while(gen)
	{
		gen2=gen;
		gen=gen->next;
		++(gen2->timer);
		gen2->process(gen2);
	}
}
void drawgenerics(void)
{
generic *gen;
	gen=activegeneric.next;
	while(gen)
	{
		gen->draw(gen);
		gen=gen->next;
	}
}


static void plotsprites(void)
{
int i;
sprite *sp;
figure *fig;

	sp=sprites;
	for(i=0;i<spritesused;++i)
	{
		fig=sp->fig;
		drawfigure(sp->xpos,sp->ypos,fig);
		++sp;
	}
}
static void erasesprites(void)
{
int i;
sprite *sp;
figure *fig;

	sp=sprites;
	for(i=0;i<spritesused;++i)
	{
		fig=sp->fig;

		solidcopy(&background,
			sp->xpos+fig->xdelta,sp->ypos+fig->ydelta,
			fig->xsize,fig->ysize);
		++sp;
	}
}

static void clearsprites(void) {
	int i;
	sprite *sp;
	figure *fig;

	sp=sprites;
	for(i=0;i<spritesused;++i) {
		fig=sp->fig;

		clearrect(sp->xpos+fig->xdelta,sp->ypos+fig->ydelta,
			fig->xsize,fig->ysize);
		++sp;
	}
}

static void clearspritelist(void) {
	spritesused=0;
}


static int centerxchange(player *pl) {
	int speed;
	int val;
	int line;
	int max;

	max=arrayspacex<<FRACTION;
	speed=pl->speed;
	val=pl->xpos+(max<<2);
	val%=max;
	line=max>>1;
	if(val<line) {
		if(val-speed<0)
			return -val;
		else
			return -speed;
	} else if(val>=line) {
		if(val+speed>max)
			return max-val;
		else
			return speed;
	}
	return 0;
}

void centerx(player *pl) {
	pl->xpos+=centerxchange(pl);
}

static int centerychange(player *pl) {
	int speed;
	int val;
	int line;
	int max;

	max=arrayspacey<<FRACTION;
	speed=pl->speed;
	val=pl->ypos+(max<<2);
	val%=max;
	line=max>>1;
	if(val<line)
	{
		if(val-speed<0)
			return -val;
		else
			return -speed;
	} else if(val>=line)
	{
		if(val+speed>max)
			return max-val;
		else
			return speed;
	}
	return 0;
}

void centery(player *pl) {
	pl->ypos+=centerychange(pl);
}

static void trymove(player *pl,int dx,int dy) {
	int wx,wy;
	int sx,sy;
	int there;
	int px,py;
	static int depth=0;
	int tx,ty;

	++depth;
	sx=(dx*(arrayspacex+1)) << (FRACTION-1);
	sy=(dy*(arrayspacey+1)) << (FRACTION-1);

	wx=screentoarrayx(pl->xpos+sx);
	wy=screentoarrayy(pl->ypos+sy);
	px=screentoarrayx(pl->xpos);
	py=screentoarrayy(pl->ypos);

	if(wx<0 || wx>=arraynumx || wy<0 || wy>=arraynumy) 	{
		--depth;
		return;
	}
	there=field[wy][wx];
	if((px!=wx || py!=wy) && 
		(there==FIELD_BRICK||there==FIELD_BOMB||there==FIELD_BORDER))
	{
		if(dx && !dy) {
			ty=centerychange(pl);
			if(ty && depth==1)
				trymove(pl,0,-SGN(ty));
				
		} else if(dy && !dx) {
			tx=centerxchange(pl);
			if(tx && depth==1)
				trymove(pl,-SGN(tx),0);
		}
		
	} else {
		pl->xpos+=dx*pl->speed;
		pl->ypos+=dy*pl->speed;
		if(dx && !dy) centery(pl);
		if(dy && !dx) centerx(pl);
	}
	--depth;
}


static void applybonus(player *pl,bonustile *bonus) {
	int type;
	int maxflame;

	maxflame=arraynumx>arraynumy ? arraynumx : arraynumy;
	type=bonus->type;
	deletebonus(bonus);
	switch(type)
	{
	case TILE_BOMB:
		++(pl->bombsavailable);
		break;
	case TILE_FLAME:
		if(pl->flamelength<maxflame)
			++(pl->flamelength);
		break;
	case TILE_GOLDFLAME:
		pl->flamelength=maxflame;
		break;
	case TILE_CONTROL:
		pl->flags|=FLG_CONTROL;
		break;
	case TILE_SKATES:
		if (pl->speed < SPEEDSTART) {
			pl->speed = SPEEDSTART;
		} else {
			pl->speed+=SPEEDDELTA;
		}
		if(pl->speed>SPEEDMAX) pl->speed=SPEEDMAX;
		break;
	case TILE_TURTLE:
		pl->speed=SPEEDTURTLE;
		pl->speedturtle_timeout=SPEEDTURTLE_TIMEOUT;
		break;
	}
}

static void doplayer(player *pl) {
	int last;
	int color;
	int speed;
	int px,py;
	int there;
	int flags;
	int what;

	if(pl->controller==-1)
		what=myaction;
	else
		what=actions[pl->controller];

	flags=pl->flags;
	if(flags&FLG_DEAD) return;
	color=pl->color;
	last=pl->doing;
	pl->doing=what;
	speed=pl->speed;
	px=screentoarrayx(pl->xpos);
	py=screentoarrayy(pl->ypos);
	there=field[py][px];

	if(what==ACT_QUIT) {
		killplayer(pl);
		return;
	}

	if(there==FIELD_BONUS) {
		playsound((myrand()&1) ? 1 : 5);
		applybonus(pl,info[py][px]);
	} else if(there==FIELD_FLAME) {
		killplayer(pl);
		return;
	}

//	if(what&ACT_TURBO) speed<<=2;
	if(what&ACT_PRIMARY) {
		if(there==FIELD_EMPTY && pl->bombsavailable)
			dropbomb(pl,px,py,
				(flags&FLG_CONTROL) ? BOMB_CONTROLLED :BOMB_NORMAL);
	}
	if(what&ACT_SECONDARY && (flags&FLG_CONTROL))
		detonatecontrolled(pl);

	switch(what&ACT_MASK) {
	case ACT_UP:
		trymove(pl,0,-1);
		pl->figcount=(pl->figcount+1)%15;
		pl->figure=walking[color]+pl->figcount+15;
		break;
	case ACT_DOWN:
		trymove(pl,0,1);
		pl->figcount=(pl->figcount+1)%15;
		pl->figure=walking[color]+pl->figcount+30;
		break;
	case ACT_LEFT:
		trymove(pl,-1,0);
		pl->figcount=(pl->figcount+1)%15;
		pl->figure=walking[color]+pl->figcount+45;
		break;
	case ACT_RIGHT:
		trymove(pl,1,0);
		pl->figcount=(pl->figcount+1)%15;
		pl->figure=walking[color]+pl->figcount;
		break;
	case ACT_NONE:
		break;
	}

	if (pl->speedturtle_timeout > 0) {
		pl->speedturtle_timeout--;
		if (0 == pl->speedturtle_timeout) {
			if (pl->speed < SPEEDSTART) pl->speed = SPEEDSTART;
		}
	}
}

static void initplayer(int color,int x,int y,int controller) {
	player *pl;

	pl=allocentry();
	if(!pl)
		nomem("Couldn't get player structure (allocentry())");
	addtail(&activeplayers,pl);
	memset(pl,0,sizeof(player));
	pl->xpos=arraytoscreenx(x);
	pl->ypos=arraytoscreeny(y);
	pl->color=color;
	pl->speed=SPEEDSTART;
	pl->flags=0;
	pl->fixx=-4;
	pl->fixy=-40;
	pl->flamelength=gameoptions[GO_FLAMES]+1;
	pl->bombsavailable=gameoptions[GO_BOMBS]+1;
	pl->controller=controller;
	field[y][x]=FIELD_EMPTY;
	if(x) field[y][x-1]=FIELD_EMPTY;
	if(y) field[y-1][x]=FIELD_EMPTY;
	if(x<arraynumx-1) field[y][x+1]=FIELD_EMPTY;
	if(y<arraynumy-1) field[y+1][x]=FIELD_EMPTY;
}

unsigned char playerpositions[] = {
2,0,0,
3,14,10,
4,14,0,
5,0,10,
1,6,0,
6,8,10,
7,0,6,
8,14,4,
};

static void initplayers(void) {
	int i;
	unsigned char *p;
	int c,x,y;

	if(!network)
	{
		initplayer(2,0,0,-1);
		return;
	}
	p=playerpositions;
	for(i=0;i<MAXNETNODES;++i)
	{
		if(!netnodes[i].used) continue;
		c=*p++;
		x=*p++;
		y=*p++;
		initplayer(c,x,y,i);
	}
}

void initlist(void *first,int size,int num) {
	unsigned char *p;
	int i;

	memset(first,0,size*num);
	for(i=0;i<num-1;++i)
	{
		p=first;
		p+=size;
		((list *)first)->next=(void *)p;
		first=p;
	}
	((list *)first)->next=0;
}

void *allocentry() {
list *entry;
	if(!(entry=((list *)things)->next)) return 0;
	((list *)things)->next=entry->next;
	memset(entry,0,thingsize);
	return entry;
}

void freeentry(void *entry) {
	((list *)entry)->next=((list *)things)->next;
	((list *)things)->next=entry;
}

void addtail(void *header,void *entry) {
	while(((list *)header)->next) header=((list *)header)->next;
	((list *)header)->next=entry;
	((list *)entry)->next=0;
}

void delink(void *header,void *entry) {
	while(((list *)header)->next != entry) header=((list *)header)->next;
	((list *)header)->next=((list *)entry)->next;
	((list *)entry)->next=0;
	freeentry(entry);
}

static void allocthings() {
	if(!things)
	{
		thingsize=sizeof(bomb);
		if((int)sizeof(flame)>thingsize) thingsize=sizeof(flame);
		if((int)sizeof(brickdecay)>thingsize) thingsize=sizeof(brickdecay);
		if((int)sizeof(player)>thingsize) thingsize=sizeof(player);
		thingnum=MAXTHINGS;
		things=malloc(thingsize*thingnum);
		if(!things) nomem("Trying to allocate thing memory");
	}
	initlist(things,thingsize,thingnum);
}

static void initheader(void *p) {
	memset(p,0,sizeof(list));
}

static void firstzero(void) {
	gountil=mycount=mydatacount=0;
	memset(latestactions,0,sizeof(latestactions));
	memset(latestcounts,0,sizeof(latestcounts));
	actionput=actioncount=0;
	netframe=0;
}

static void zerocounts(void) {
}

static void initgame() {
	int i,j;
	int x,y;
	int bl;
	int *p;
	int comp;

//	gountil=mycount=mydatacount=netframe=0;
	zerocounts();
	if (network != SLAVE)
		memmove(gameoptions,configopts,sizeof(gameoptions));
	gameframe=0;
	allocthings();
	initheader(&activebombs);
	initheader(&activeflames);
	initheader(&activedecays);
	initheader(&activebonus);
	initheader(&activeplayers);
	initheader(&activegeneric);

	detonateput=detonatetake=0;

	p=bonuschances;
	bonustotal=0;
	for(;;) {
		i=*p++;
		if(i==TILE_NONE) break;
		bonustotal+=*p++;
	}
	bonustotal+=*p=64*(3-gameoptions[GO_GENEROSITY]);
	memset(field,0,sizeof(field));
	comp=gameoptions[GO_DENSITY];
	for(j=0;j<arraynumy;++j)
		for(i=0;i<arraynumx;++i) {
/*			if((i&j)&1) {
				field[j][i]=FIELD_BORDER;
			} else*/
				field[j][i]=
				(myrand()&3)>=comp ? FIELD_BRICK : FIELD_EMPTY;
		}

	solidcopyany(&backgroundoriginal,&background,0,0,IXSIZE,IYSIZE);

	initplayers();

	for(j=0;j<arraynumy;++j) {
		y=arraystarty+j*arrayspacey;
		for(i=0;i<arraynumx;++i) {
			x=arraystartx+i*arrayspacex;
			bl=field[j][i];
			if(bl==FIELD_BORDER) bl=2;
			else if(bl==FIELD_BRICK) bl=1;
			else continue;
			drawfigureany(x,y,blocks+bl,&background);
		}
	}
	solidcopy(&background,0,0,IXSIZE,IYSIZE);
	copyup();
}

static Uint32 sdlhandler(Uint32 time) {
#if defined (SDL_LATENCY)
	outmsgs();
#endif
	interrupted=1;
	hc++;
	return time;
}

static void pulseon(void) {
	if(havepulse) return;
	havepulse=1;
	SDL_SetTimer(40,sdlhandler);
	hc=interrupted=0;
}

static void pulseoff(void) {
pulseon();
return;
	if(!havepulse) return;
	havepulse=0;
	SDL_SetTimer(0,0);
	
}

int main(int argc,char **argv) {
	char *p;

	strcpy(playername,"ANONYMOUS");
	p=getenv("USER");
	if(p) strncpy(playername,p,sizeof(playername));
	initmyrand();

	opengfx(argc, argv);
	network=0;
	getsocket();
	if (!initannouncer()) exit(1);

	soundopen();
	loadgfx();

	framecount=0;
	gamemode=0;
	exitflag=0;
	while(!exitflag)
		domode();

	soundclose();
	freeannouncer();
	freesocket();
	closegfx();
	return 0;
}

int menuhistory[32]={0};
char menustring[1024];
char *menuput,*menuitems[40],*menutitle;
int menunum;
int menudelta;

static void menustart() {
	menunum=-1;
	menuput=menustring;
	*menuput=0;
}

static void additem(char *item,...) {
	char output[256];
	va_list ap;

	va_start(ap, item);

	vsprintf(output,item,ap);
	if(menunum<0)
		menutitle=menuput;
	else
		menuitems[menunum]=menuput;
	++menunum;
	strcpy(menuput,output);
	menuput+=strlen(output)+1;
}

static void drawmenu(int selected) {
	int i,j;
	int tx,ty;

	clear();
	j=strlen(menutitle)*bigfontxsize;
	drawbigstring((IXSIZE-j) >> 1,20,menutitle);
	ty=((IYSIZE-(bigfontysize*menunum))>>1)-(IYSIZE>>3);
	for(i=0;i<menunum;++i)
	{
		j=strlen(menuitems[i])*bigfontxsize;
		tx=(IXSIZE-j) >> 1;
		if(i==selected)
		{
			greyrect(0,ty-1,tx-5,bigfontysize);
			greyrect(tx+j+3,ty-1,IXSIZE-(tx+j+3),bigfontysize);
		}
		drawbigstring(tx,ty,menuitems[i]);
		ty+=bigfontyspace;
	}
}

static void drawjoinscreen(void) {
int i;
char name[17];
char temp[64];

#define JX (IXSIZE/3)
#define JY (IYSIZE/4)

	clear();
	centerbig(20,"JOIN NETWORK GAME");
	drawbigstring(JX,JY,"SLOT    NAME");
	for(i=0;i<MAXNETNODES;++i)
	{
		if(!netnodes[i].used) continue;
		memmove(name,netnodes[i].name,16);
		name[16]=0;
		sprintf(temp,"  %d     %s",i+1,name);
		drawbigstring(JX,JY+(i+1)*bigfontyspace,temp);
	}
}

static int tryjoin(int which) {
	long now;
	int size;
	char amin;
	int res;

	pulseoff();
	memmove(&mastername, &gamelistentries[which].netname,sizeof(mastername));
	*regpacket=PKT_JOIN;
	memmove(regpacket+1, &gamelistentries[which].unique,4);
	unique = gamelistentries[which].unique;
	memmove(regpacket+5,playername,16);
	now=longtime();
	amin=0;
	size=0;
	while(longtime()-now<10 && !amin) {
		putmsg(&mastername,regpacket,1+4+16);
		size=getmsg(1000);
		res=scaninvite(size);
		if(!size) continue;
		if(size==1) return 0;
		amin=1;
	}
	if(!amin) return 0;
	scaninvite(size);
	drawjoinscreen();
	copyup();
	if(*mesg==PKT_BEGIN) amin=2;
	while(amin<2) {
		scaninput();
		while(anydown())
			switch(takedown()) {
			case 0x1b:
				*regpacket=PKT_QUIT;
				now=longtime();
				while(longtime()-now<10)
				{
					putmsg(&mastername,regpacket,5);
					size=getmsg(1000);
					if(size<6) continue;
					if(*mesg!=PKT_ACK) continue;
					if(!memcmp(mesg+1,regpacket,5))
						break;
				}
				return 0;
			}
		size=getmsg(200);
		if((res=scaninvite(size))) {
			drawjoinscreen();
			copyup();
			if(res==3) return 1;
			if(res==1) return 0;
		}
	}
	return 0;
}
//returns 0=ignore packet,1=we're rejected,2=INVITE,3=BEGIN
static int scaninvite(int size) {
	int i;
	unsigned char *take;

	if(size<7) return 0;
	if(*mesg!=PKT_INVITE && *mesg!=PKT_BEGIN) return 0;
	if(memcmp(mesg+1,regpacket+1,4)) return 0;
	myslot=mesg[5];
	if(mesg[6]==0xff) return 1;
	memset(netnodes,0,sizeof(netnodes));
	size-=6;
	take=mesg+6;
	while(*take!=0xff && size>=17) {
		if((i=*take)<MAXNETNODES) {
			netnodes[i].used=1;
			memmove(netnodes[i].name,take+1,16);
		}
		take+=17;
		size-=17;
	}
	take += 1;
	if(*mesg==PKT_INVITE) {
		return 2;
	} else { /* BEGIN */
		if (size != sizeof(gameoptions)) {
			fprintf(stderr, "PKT_BEGIN has wrong size: %i != %i\n", size, (int) sizeof(gameoptions));
			return 1; /* broken packet */
		}
		memmove(gameoptions,take,sizeof(gameoptions));
		return 3;
	}
}

static void mypause(void) {
	while(!interrupted) {
		pollinput();
		SDL_Delay(1);
	}
	interrupted=0;
}


static int domenu(int whichmenu) {
	char redraw;
	int selected;
	int mcount=0;

	if(whichmenu>=0)
		selected=menuhistory[whichmenu];
	else
		selected=0;

	redraw=1;
	clearspritelist();
	pulseon();
	while(!exitflag) {
		if(redraw) {
			drawmenu(selected);
			redraw=0;
		}
		mypause();
		scaninput();
		++mcount;

		clearsprites();
		clearspritelist();
		addsprite(IXSIZE/2-50-20,IYSIZE-80,walking[2]+(30+mcount%15));
		addsprite(IXSIZE/2+50-20,IYSIZE-80,walking[3]+(30+(mcount+7)%15));
		plotsprites();
		update();

		if(anydown()) playsound(3);
		while(anydown())
			switch(takedown()) {
			case MYLEFT:
				menudelta=-1;
				return selected;
			case MYRIGHT:
			case ' ':
			case 13:
				menudelta=1;
				return selected;
			case 'k':
			case MYUP:
				if(selected) --selected;
				else selected=menunum-1;
				if(whichmenu>=0)
					menuhistory[whichmenu]=selected;
				redraw=1;
				break;
			case 'j':
			case MYDOWN:
				++selected;
				if(selected==menunum) selected=0;
				if(whichmenu>=0)
					menuhistory[whichmenu]=selected;
				redraw=1;
				break;
			case 0x1b:
				if(!whichmenu && selected)
				{
					selected=0;
					redraw=1;
					break;
				}
				menudelta=1;
				return 0;
		}
	}
	return 0;
}


static void domode0(void) {
	int sel;

	pulseon();
	while(!exitflag) {
		menustart();
		additem("BOMBER MAIN MENU");
		additem("EXIT GAME");
		additem("START SINGLE PLAYER GAME");
		additem("OPTIONS");
// 		additem("REMAP MOVEMENT KEYS");
		additem("START NETWORK GAME");
		additem("JOIN NETWORK GAME");
		sel=domenu(0);
		if(!sel) {exitflag=1;break;}
		if(sel==1) {gamemode=1;break;}
		if(sel==2) {gamemode=2;break;}
		if(sel==3) {gamemode=3;break;}
		if(sel==4) {gamemode=4;break;}
	}
}


static void domode1(void) {
	int code;
	network=0;

	initgame();
	pulseon();
	while(!(code=iterate())) ++framecount;
	if(code==CODE_QUIT) gamemode=0;
}

unsigned char gameoptions[10];
char *densities[]={"PACKED","HIGH","MEDIUM","LOW"};
char *generosities[]={"LOW","MEDIUM","HIGH","RIDICULOUS"};

static void domode2(void) {
	int sel;

	for(;;) {
		menustart();
		additem("GAME OPTIONS");
		additem("RETURN TO MAIN MENU");
		additem("DENSITY: %s",densities[configopts[GO_DENSITY]]);
		additem("GENEROSITY: %s",generosities[configopts[GO_GENEROSITY]]);
		additem("INITIAL FLAME LENGTH: %d",configopts[GO_FLAMES]+1);
		additem("INITIAL NUMBER OF BOMBS: %d",configopts[GO_BOMBS]+1);
		sel=domenu(2);
		if(!sel) {gamemode=0;break;}
		if(sel==1) {
			configopts[GO_DENSITY]+=menudelta;
			configopts[GO_DENSITY]&=3;
		}
		if(sel==2) {
			configopts[GO_GENEROSITY]+=menudelta;
			configopts[GO_GENEROSITY]&=3;
		}
		if(sel==3) {
			configopts[GO_FLAMES]+=menudelta;
			configopts[GO_FLAMES]&=7;
		}
		if(sel==4) {
			configopts[GO_BOMBS]+=menudelta;
			configopts[GO_BOMBS]&=7;
		}
	}
}

static void failure(char *str,...) {
	gamemode=0;
}

static void drawmode3(void) {
	int i;
	char *name;
	char temp[64];

#define M3X (IXSIZE/3)
#define M3Y (IYSIZE/4)

	clear();
	centerbig(20,"HOST NETWORK GAME");
	drawbigstring(M3X,M3Y,"SLOT    NAME");
	for(i=0;i<MAXNETNODES;++i) {
		if(!netnodes[i].used) continue;
		name=netnodes[i].name;
		sprintf(temp,"  %d     %s",i+1,name);
		drawbigstring(M3X,M3Y+(i+2)*bigfontyspace,temp);
	}

}


static void domode3(void) {
	int size;
	int i,j;
	unsigned char temp[64];

	pulseoff();
	unique = gtime();
	if(!registergame(playername, myname.sin_port, unique, gameversion)) {failure("COULD NOT REGISTER GAME");return;}
	numnetnodes=1;
	memset(netnodes,0,sizeof(netnodes));
	netnodes[0].used=1;
	memmove(netnodes[0].name,playername,16);

	myslot=0;
	drawmode3();
	copyup();

	for(;;) {
		scaninput();
		while(anydown()) {
			switch(takedown()) {
			case 0x1b:
				unregistergame();
				gamemode=0;
				return;
			case ' ':
			case 13:
				initmyrand();
				unregistergame();
				inform(PKT_BEGIN);
				network=MASTER;
				firstzero();
				gamemode=5;
				return;
			}
		}
		size=getmsg(40);
		if(!((size>=21 && *mesg==PKT_JOIN) || (size>=5 && *mesg==PKT_QUIT)))
			continue;
		if(memcmp(mesg+1,regpacket+1,4)) continue;
		j=-1;
		for (i=1; i < MAXNETNODES; ++i) {
			if(!netnodes[i].used) {
				if(j==-1) j=i;
				continue;
			}
			if(memcmp(&netnodes[i].netname.sin_addr.s_addr,
				&sender.sin_addr.s_addr,4)) continue;
			if(memcmp(&netnodes[i].netname.sin_port,
				&sender.sin_port,2)) continue;
			break;
		}
		if(*mesg==PKT_QUIT) {
			if(i<MAXNETNODES)
				memset(netnodes+i,0,sizeof(struct netnode));
			*temp=PKT_ACK;
			memmove(temp+1,mesg,5);
			putmsg(&sender,temp,6);
		} else {
			if (i==MAXNETNODES && j==-1) {
				*mesg=PKT_INVITE;
				memmove(mesg+1,regpacket+1,4);
				mesg[5]=0xff;
				putmsg(&sender,mesg,6);
				continue;
			}
			if(i==MAXNETNODES) i=j;
			memmove(&netnodes[i].netname.sin_addr.s_addr,
				&sender.sin_addr.s_addr,4);
			memmove(&netnodes[i].netname.sin_port,
				&sender.sin_port,2);
			netnodes[i].netname.sin_family=AF_INET;
			netnodes[i].used=1;
			memmove(netnodes[i].name,mesg+5,16);
		}

		inform(PKT_INVITE);
		drawmode3();
		copyup();
	}

	gamemode=0;
}

static void domode4(void) {
	int i;
	int sel;

	pulseoff();
	if (!searchgames(gameversion)) {
		gamemode = 0;
		return;
	}
	if (gamelistsize == 0) {
		menustart();
		additem("NO GAMES AVAILABLE");
		domenu(-1);
		gamemode=0;
		return;
	}

	menustart();
	additem("JOIN NETWORK GAME");
	additem("EXIT");

	for (i = 0; i < gamelistsize; i++) {
		additem(gamelistentries[i].name);
	}

	sel=domenu(-1);
	if(!sel) {
		gamemode=0;
		return;
	}
	if(!tryjoin(sel-1)) {
		gamemode=0;
		return;
	}
	initmyrand();
	network=SLAVE;
	firstzero();
	gamemode=5;
}

static void domode5(void) { /* network game */
	int code;

	initgame();
	pulseon();
	while(!(code=iterate())) ++framecount;
	if(code==CODE_QUIT) {network=0;gamemode=0;}
}


void (*modefunctions[])()= {
	domode0,
	domode1,
	domode2,
	domode3,
	domode4,
	domode5,
};


static void domode(void) {
	modefunctions[gamemode]();
}


static int getaction(void) {
	int what;

	what=ACT_NONE;
	if(checkpressed(MYLEFT)) what=ACT_LEFT;
	else if(checkpressed(MYRIGHT)) what=ACT_RIGHT;
	else if(checkpressed(MYDOWN)) what=ACT_DOWN;
	else if(checkpressed(MYUP)) what=ACT_UP;
	else if(checkdown(13)) what=ACT_ENTER;
	else if(checkdown(0x1b)) what=ACT_QUIT;

	if(checkdown(' '))
		what|=ACT_PRIMARY;
	if(checkdown('b'))
		what|=ACT_SECONDARY;

	return what;
}

static void processplayers(void) {
	player *pl,*pl2;

	pl=activeplayers.next;
	while(pl) {
		pl2=pl;
		pl=pl->next;
		doplayer(pl2);
	}
}

static void processquits(void) {
	int i;

	if(network!=SLAVE) return;
	for(i=0;i<MAXNETNODES;++i)
	{
		if(netnodes[i].used && actions[i]==ACT_QUIT)
			netnodes[i].used=0;
	}
}

static int iterate(void) {
	int i;
	static int deathcount=0;

	mypause();
	scaninput();

	erasesprites();
	clearspritelist();
	gfxunlock();

	myaction=getaction();
	if(!network && myaction==ACT_QUIT) return CODE_QUIT;
	i=networktraffic();
	if(i<0)
		gountil=mycount+1;
	else
		gountil=i;

	while(mycount<gountil) {
		++mycount;
		if(network) {
			i=gountil-mycount;
			if(i>=ACTIONHIST) // too far behind
				return CODE_QUIT;
			memcpy(actions,actionblock+i*MAXNETNODES,MAXNETNODES);
			if(actions[myslot]==ACT_QUIT) return CODE_QUIT;
		}
		processbombs();
		dodetonations();
		processdecays();
		processflames();
		processgenerics();
		processquits();
		processplayers();
	}

/*
	if(!(rand()&127))
	{
		i=gtime();
		while(gtime()-i<100);
	}
*/

	drawbombs();
	drawbonus();
	drawgenerics();
	drawdecays();
	drawflames();
	drawplayers();
	plotsprites();
	update();
	if(!activegeneric.next) {
		player *pl;
		int deadplayers = 0;
		pl=activeplayers.next;
		i=0;
		while(pl) {
			if(!(pl->flags & FLG_DEAD))
				++i;
			else
				deadplayers++;
			pl=pl->next;
		}
		if (deadplayers > 0 && (!i || (network && i==1))) {
			++deathcount;
			if(deathcount==25)
				return CODE_ALLDEAD;
		} else
			deathcount=0;
	}
	return CODE_CONT;
}