Fix more null termination bugs

IRCClient/IRCClientSession.m

 		_version = [NSString stringWithFormat:@"IRCClient Framework v%s (Said Achmiz) - libirc v%d.%d (George Yunaev)", IRCCLIENTVERSION, high, low];
 		
 		_channels = [[NSMutableDictionary alloc] init];
+		_encoding = NSUTF8StringEncoding;
     }
     return self;
 }
 {
 	IRCClientSession* clientSession = (__bridge IRCClientSession *) irc_get_ctx(session);
 	NSString *nick = @(origin);
-	NSData *channelName = [NSData dataWithBytes:params[0] length:strlen(params[0])];
+	NSData *channelName = [NSData dataWithBytes:params[0] length:strlen(params[0]) + 1];
 	
 	[clientSession userJoined:nick channel:channelName];
 }
 {
 	IRCClientSession *clientSession = (__bridge IRCClientSession *) irc_get_ctx(session);
 	NSString *nick = @(origin);
-	NSData *channelName = [NSData dataWithBytes:params[0] length:strlen(params[0])];
+	NSData *channelName = [NSData dataWithBytes:params[0] length:strlen(params[0]) + 1];
 	NSData *reason = nil;
 	
 	if (count > 1)
 	{
-		reason = [NSData dataWithBytes:params[1] length:strlen(params[1])];
+		reason = [NSData dataWithBytes:params[1] length:strlen(params[1]) + 1];
 	}
 	
 	[clientSession userParted:nick channel:channelName withReason:reason];
 {
 	IRCClientSession *clientSession = (__bridge IRCClientSession *) irc_get_ctx(session);
 	NSString *nick = @(origin);
-	NSData *channelName = [NSData dataWithBytes:params[0] length:strlen(params[0])];
+	NSData *channelName = [NSData dataWithBytes:params[0] length:strlen(params[0]) + 1];
 	NSString *mode = @(params[1]);
 	NSString *modeParams = nil;
 	
 {
 	IRCClientSession *clientSession = (__bridge IRCClientSession *) irc_get_ctx(session);
 	NSString *nick = @(origin);
-	NSData *channelName = [NSData dataWithBytes:params[0] length:strlen(params[0])];
+	NSData *channelName = [NSData dataWithBytes:params[0] length:strlen(params[0]) + 1];
 	NSData *topic = nil;
 	
 	if (count > 1)

NSData+SA_NSDataExtensions/NSData+SA_NSDataExtensions.m

 //
-//  NSData+SA_NSDataExtensions.h
+//  NSData+SA_NSDataExtensions.m
 //
 //  Copyright (c) 2015 Said Achmiz.
 //
 		[self getBytes:terminated_string_buffer length:self.length];
 		terminated_string_buffer[self.length] = '\0';
 		
-		return [NSData dataWithBytesNoCopy:terminated_string_buffer length:self.length + 1 freeWhenDone:YES];
+		return [NSData dataWithBytesNoCopy:terminated_string_buffer length:(self.length + 1) freeWhenDone:YES];
 	}
 }
 
 		char* unterminated_string_buffer = malloc(self.length - 1);
 		[self getBytes:unterminated_string_buffer length:self.length - 1];
 		
-		return [NSData dataWithBytesNoCopy:unterminated_string_buffer length:self.length - 1 freeWhenDone:YES];
+		return [NSData dataWithBytesNoCopy:unterminated_string_buffer length:(self.length - 1) freeWhenDone:YES];
 	}
 }
 

NSData+SA_NSDataExtensions/README.md

+NSData+SA_NSDataExtensions
+
+Adds utility functions to NSData, that help deal with null termination of C strings.
+
+This category on NSData adds properties that allow you to get the null-terminated or non-null-terminated versions of byte arrays stored as NSData objects, and to easily check whether an NSData's byte array is, or is not, null-terminated (that is, whether its last byte is a null).
+
+Copyright (c) 2015 Said Achmiz.