Cube  Check-in [4d3e209260]

		@try {
			stream = (OFSeekableStream *)[[OFIRIHandler
			    handlerForIRI:IRI] openItemAtIRI:IRI mode:@"r"];
		} @catch (id e) {
			return false;
		}

		if (![stream isKindOfClass:OFSeekableStream.class])
			return false;

		md2_header header;
		[stream readIntoBuffer:&header exactLength:sizeof(md2_header)];
		endianswap(
		    &header, sizeof(int), sizeof(md2_header) / sizeof(int));

	return self;
}

- (OFComparisonResult)compare:(id)otherObject
{
	MenuItem *otherItem;

	if (![otherObject isKindOfClass:MenuItem.class])
		@throw [OFInvalidArgumentException exception];

	int x = (int)_text.longLongValue;
	int y = (int)otherItem.text.longLongValue;

	if (x > y)
		return OFOrderedAscending;

		                          persisted:true];

		if (identifiers == nil)
			identifiers = [[OFMutableDictionary alloc] init];

		identifiers[name] = alias;
	} else {
		if ([alias isKindOfClass:Alias.class])
			alias.action = action;
		else
			conoutf(
			    @"cannot redefine builtin %@ with an alias", name);
	}
}
COMMAND(alias, ARG_2STR)

}

OFString *
getalias(OFString *name)
{
	Alias *alias = identifiers[name];

	if ([alias isKindOfClass:Alias.class])
		return alias.action;

	return nil;
}

bool
addcommand(OFString *name, void (*function)(), int argumentsTypes)

OFString *
lookup(OFString *n) // find value of ident referenced with $ in exp
{
	@autoreleasepool {
		__kindof Identifier *identifier =
		    identifiers[[n substringFromIndex:1]];

		if ([identifier isKindOfClass:Variable.class]) {
			return [OFString
			    stringWithFormat:@"%d", *[identifier storage]];
		} else if ([identifier isKindOfClass:Alias.class])
			return [identifier action];
	}

	conoutf(@"unknown alias lookup: %@", [n substringFromIndex:1]);
	return n;
}

			if (identifier == nil) {
				@try {
					val = (int)[c longLongValueWithBase:0];
				} @catch (OFInvalidFormatException *e) {
					conoutf(@"unknown command: %@", c);
				}
			} else {
				if ([identifier isKindOfClass:Command.class]) {

					// game defined commands use very
					// ad-hoc function signature, and just
					// call it
					OFArray<OFString *> *arguments =
					    [[OFArray alloc]
					        initWithObjects:w
					                  count:numargs];
					val = [identifier
					    callWithArguments:arguments
					               isDown:isDown];
				} else if ([identifier
				               isKindOfClass:Variable.class]) {

					// game defined variables
					if (isDown) {
						if (w[1].length == 0)
							[identifier printValue];
						else
							[identifier
							    setValue:
							        (int)[w[1]
							            longLongValueWithBase:
							                0]];
					}
				} else if ([identifier
				               isKindOfClass:Alias.class]) {
					// alias, also used as functions and
					// (global) variables
					for (int i = 1; i < numargs; i++) {
						// set any arguments as
						// (global) arg values so
						// functions can access them
						OFString *t = [OFString

	            @"autoexec.cfg to override anything\n"
	            @"\n"];
	writeclientinfo(stream);
	[stream writeString:@"\n"];

	[identifiers enumerateKeysAndObjectsUsingBlock:^(
	    OFString *name, __kindof Identifier *identifier, bool *stop) {
		if (![identifier isKindOfClass:Variable.class] ||
		    ![identifier persisted])
			return;

		[stream writeFormat:@"%@ %d\n", identifier.name,
		        *[identifier storage]];
	}];
	[stream writeString:@"\n"];

	writebinds(stream);
	[stream writeString:@"\n"];

	[identifiers enumerateKeysAndObjectsUsingBlock:^(
	    OFString *name, __kindof Identifier *identifier, bool *stop) {
		if (![identifier isKindOfClass:Alias.class] ||
		    [identifier.name hasPrefix:@"nextmap_"])
			return;

		[stream writeFormat:@"alias \"%@\" [%@]\n", identifier.name,
		        [identifier action]];
	}];

// serverbrowser.cpp: eihrul's concurrent resolver, and server browser window
// management

#include "SDL_thread.h"
#include "cube.h"

@interface ResolverThread: OFThread
{
	volatile bool _stop;
}

@property (copy, nonatomic) OFString *query;
@property (nonatomic) int starttime;

@end

@interface ResolverResult: OFObject
@property (readonly, nonatomic) OFString *query;
@property (readonly, nonatomic) ENetAddress address;

- (instancetype)init OF_UNAVAILABLE;
- (instancetype)initWithQuery:(OFString *)query address:(ENetAddress)address;
@end

static OFMutableArray<ResolverThread *> *resolverthreads;
static OFMutableArray<OFString *> *resolverqueries;
static OFMutableArray<ResolverResult *> *resolverresults;

static SDL_sem *resolversem;
static int resolverlimit = 1000;

@implementation ResolverThread
- (id)main
{

	while (!_stop) {
		SDL_SemWait(resolversem);

		@synchronized(ResolverThread.class) {
			if (resolverqueries.count == 0)

				continue;

			_query = resolverqueries.lastObject;
			[resolverqueries
			    removeObjectAtIndex:resolverqueries.count - 1];
			_starttime = lastmillis;
		}

		ENetAddress address = { ENET_HOST_ANY, CUBE_SERVINFO_PORT };
		enet_address_set_host(&address, _query.UTF8String);

		@synchronized(ResolverThread.class) {
			[resolverresults addObject:[[ResolverResult alloc]
			                               initWithQuery:_query
			                                     address:address]];

			_query = NULL;
			_starttime = 0;
		}
	}

	return nil;
}

- (void)stop
{
	_stop = true;
}
@end

@implementation ResolverResult
- (instancetype)initWithQuery:(OFString *)query address:(ENetAddress)address
{
	self = [super init];

	_query = query;
	_address = address;

	return self;
}
@end

void
resolverinit(int threads, int limit)
{
	resolverthreads = [[OFMutableArray alloc] init];
	resolverqueries = [[OFMutableArray alloc] init];
	resolverresults = [[OFMutableArray alloc] init];
	resolverlimit = limit;
	resolversem = SDL_CreateSemaphore(0);


	while (threads > 0) {
		ResolverThread *rt = [[ResolverThread alloc] init];
		rt.name = @"resolverthread";
		[resolverthreads addObject:rt];
		[rt start];


		--threads;
	}
}

void
resolverstop(size_t i, bool restart)
{
	@synchronized(ResolverThread.class) {
		ResolverThread *rt = resolverthreads[i];
		[rt stop];


		if (restart) {
			rt = [[ResolverThread alloc] init];
			rt.name = @"resolverthread";

			resolverthreads[i] = rt;

			[rt start];
		} else
			[resolverthreads removeObjectAtIndex:i];
	}
}

void
resolverclear()
{
	@synchronized(ResolverThread.class) {
		[resolverqueries removeAllObjects];
		[resolverresults removeAllObjects];

		while (SDL_SemTryWait(resolversem) == 0)
			;


		for (size_t i = 0; i < resolverthreads.count; i++)
			resolverstop(i, true);
	}

}

void
resolverquery(OFString *name)
{
	@synchronized(ResolverThread.class) {
		[resolverqueries addObject:name];
		SDL_SemPost(resolversem);

	}
}

bool
resolvercheck(OFString **name, ENetAddress *address)
{
	@synchronized(ResolverThread.class) {
		if (resolverresults.count > 0) {
			ResolverResult *rr = resolverresults.lastObject;
			*name = rr.query;
			*address = rr.address;
			[resolverresults
			    removeObjectAtIndex:resolverresults.count - 1];
			return true;
		}


		for (size_t i = 0; i < resolverthreads.count; i++) {
			ResolverThread *rt = resolverthreads[i];

			if (rt.query) {
				if (lastmillis - rt.starttime > resolverlimit) {
					resolverstop(i, true);
					*name = rt.query;
					return true;
				}
			}
		}
	}

	return false;
}

@interface ServerInfo: OFObject <OFComparing>
@property (nonatomic) OFString *name;
@property (nonatomic) OFString *full;
@property (nonatomic) OFString *map;
@property (nonatomic) OFString *sdesc;
@property (nonatomic) int mode, numplayers, ping, protocol, minremain;
@property (nonatomic) ENetAddress address;
@end

@implementation ServerInfo
- (OFComparisonResult)compare:(id)otherObject
{
	if (![otherObject isKindOfClass:ServerInfo.class])
		@throw [OFInvalidArgumentException exception];


	if (_ping > [otherObject ping])
		return OFOrderedDescending;
	if (_ping < [otherObject ping])
		return OFOrderedAscending;

	return [_name compare:[otherObject name]];
}



@end





static OFMutableArray<ServerInfo *> *servers;
static ENetSocket pingsock = ENET_SOCKET_NULL;
static int lastinfo = 0;

OFString *
getservername(int n)
{

	return servers[n].name;
}


void
addserver(OFString *servername)
{
	@autoreleasepool {
		for (ServerInfo *si in servers)
			if ([si.name isEqual:servername])
				return;

		ServerInfo *si = [[ServerInfo alloc] init];
		si.name = servername;
		si.full = @"";
		si.mode = 0;
		si.numplayers = 0;
		si.ping = 9999;
		si.protocol = 0;
		si.minremain = 0;
		si.map = @"";
		si.sdesc = @"";
		ENetAddress address = { .host = ENET_HOST_ANY,
			.port = CUBE_SERVINFO_PORT };
		si.address = address;

		if (servers == nil)
			servers = [[OFMutableArray alloc] init];

		[servers addObject:si];
	}
}

void
pingservers()
{
	ENetBuffer buf;
	uchar ping[MAXTRANS];
	uchar *p;


	for (ServerInfo *si in servers) {
		if (si.address.host == ENET_HOST_ANY)
			continue;

		p = ping;
		putint(p, lastmillis);
		buf.data = ping;
		buf.dataLength = p - ping;
		ENetAddress address = si.address;
		enet_socket_send(pingsock, &address, &buf, 1);
	}

	lastinfo = lastmillis;
}

void
checkresolver()
{
	OFString *name = nil;
	ENetAddress addr = { ENET_HOST_ANY, CUBE_SERVINFO_PORT };
	while (resolvercheck(&name, &addr)) {
		if (addr.host == ENET_HOST_ANY)
			continue;


		for (ServerInfo *si in servers) {
			if ([name isEqual:si.name]) {
				si.address = addr;
				addr.host = ENET_HOST_ANY;
				break;
			}
		}
	}
}

void
checkpings()
{
	enet_uint32 events = ENET_SOCKET_WAIT_RECEIVE;
	ENetBuffer buf;
	ENetAddress addr;
	uchar ping[MAXTRANS], *p;
	char text[MAXTRANS];
	buf.data = ping;
	buf.dataLength = sizeof(ping);

	while (enet_socket_wait(pingsock, &events, 0) >= 0 && events) {
		if (enet_socket_receive(pingsock, &addr, &buf, 1) <= 0)
			return;


		for (ServerInfo *si in servers) {
			if (addr.host == si.address.host) {
				p = ping;
				si.ping = lastmillis - getint(p);
				si.protocol = getint(p);
				if (si.protocol != PROTOCOL_VERSION)
					si.ping = 9998;
				si.mode = getint(p);
				si.numplayers = getint(p);
				si.minremain = getint(p);
				sgetstr();
				@autoreleasepool {
					si.map = @(text);
				}
				sgetstr();
				@autoreleasepool {
					si.sdesc = @(text);
				}
				break;
			}
		}
	}
}









void
refreshservers()
{
	checkresolver();
	checkpings();
	if (lastmillis - lastinfo >= 5000)
		pingservers();
	[servers sort];
	int maxmenu = 16;


	size_t i = 0;
	for (ServerInfo *si in servers) {
		if (si.address.host != ENET_HOST_ANY && si.ping != 9999) {
			if (si.protocol != PROTOCOL_VERSION)
				si.full = [[OFString alloc]
				    initWithFormat:
				        @"%@ [different cube protocol]",
				    si.name];
			else

				si.full = [[OFString alloc]
				    initWithFormat:@"%d\t%d\t%@, %@: %@ %@",
				    si.ping, si.numplayers,
				    si.map.length > 0 ? si.map : @"[unknown]",
				    modestr(si.mode), si.name, si.sdesc];



		} else
			si.full = [[OFString alloc]
			    initWithFormat:
			        (si.address.host != ENET_HOST_ANY
			                ? @"%@ [waiting for server response]"
			                : @"%@ [unknown host]\t"),
			    si.name];

		// cut off too long server descriptions
		@autoreleasepool {
			if (si.full.length > 50)
				si.full = [si.full substringToIndex:50];
		}

		menumanual(1, i, si.full);

		if (!--maxmenu)
			return;

		i++;
	}
}

void
servermenu()
{
	if (pingsock == ENET_SOCKET_NULL) {
		pingsock = enet_socket_create(ENET_SOCKET_TYPE_DATAGRAM, NULL);
		resolverinit(1, 1000);
	}

	resolverclear();

	for (ServerInfo *si in servers)
		resolverquery(si.name);

	refreshservers();
	menuset(1);
}

void
updatefrommaster()
{
	const int MAXUPD = 32000;
	uchar buf[MAXUPD];
	uchar *reply = retrieveservers(buf, MAXUPD);
	if (!*reply || strstr((char *)reply, "<html>") ||
	    strstr((char *)reply, "<HTML>"))
		conoutf(@"master server not replying");
	else {
		[servers removeAllObjects];
		@autoreleasepool {
			execute(@((char *)reply));
		}
	}
	servermenu();
}

COMMAND(addserver, ARG_1STR)
COMMAND(servermenu, ARG_NONE)
COMMAND(updatefrommaster, ARG_NONE)

void
writeservercfg()
{
	FILE *f = fopen("servers.cfg", "w");
	if (!f)
		return;
	fprintf(f, "// servers connected to are added here automatically\n\n");
	@autoreleasepool {
		for (ServerInfo *si in servers.reversedArray)
			fprintf(f, "addserver %s\n", si.name.UTF8String);
	}
	fclose(f);
}