Objective c tcp communication instance

TCP communication instance Communicator. h [cpp] # import <Foundation/Foundation. h> @ interface Communicator: NSObject <NSStreamDelegate >{@ public NSString * host; int port ;}- (void) setup;-(void) open;-(void) close; -(void) stream :( NSStream *) stream handleEvent :( NSStreamEvent) event;-(void) readIn :( NSString *) s;-(void) writeOut :( NSString *) s; @ end Communicator. m [cpp] # import "Communicator. h "CFReadStreamRef readStr Eam; CFWriteStreamRef writeStream; NSInputStream * inputStream; NSOutputStream * outputStream; @ implementation Communicator-(void) setup {NSURL * url = [NSURL URLWithString: host]; NSLog (@ "Setting up connection to % @: % I", [url absoluteString], port); CFStreamCreatePairWithSocketToHost (kCFAllocatorDefault, (CFStringRef) [url host], port, & readStream, & writeStream); if (! CFWriteStreamOpen (writeStream) {NSLog (@ "Error, writeStream not open"); return;} [self open]; NSLog (@ "Status of outputStream: % I ", [outputStream streamStatus]); return;}-(void) open {NSLog (@ "Opening streams. "); inputStream = (NSInputStream *) readStream; outputStream = (NSOutputStream *) writeStream; [inputStream retain]; [outputStream retain]; [inputStream setDelegate: self]; [outputStream setDelegate: self]; [inputStream scheduleInRunLoop: [nsunloop currentRunLoop] forMode: Unknown]; [outputStream restart: [nsunloop currentRunLoop] forMode: Unknown]; [inputStream open]; [outputStream open];} -(void) close {NSLog (@ "Closing streams. "); [inputStream close]; [outputStream close]; [inputStream closing: [nsunloop currentRunLoop] forMode: Unknown]; [outputStream removeFromRunLoop: [nsunloop currentRunLoop] forMode: Unknown]; [inputStream setDelegate: nil]; [outputStream setDelegate: nil]; [inputStream release]; [outputStream release]; inputStream = nil; outputStream = nil;}-(void) stream :( NSStream *) stream handleEvent :( NSStreamEvent) event {NSLog (@ "Stream triggered. "); switch (event) {case NSStreamEventHasSpaceAvailable: {if (stream = outputStream) {NSLog (@" outputStream is ready. ");} break;} case NSStreamEventHasBytesAvailable: {if (stream = inputStream) {NSLog (@" inputStream is ready. "); uint8_t buf [1024]; unsigned int len = 0; len = [inputStream read: buf maxLength: 1024]; if (len> 0) {NSMutableData * data = [[NSMutableData alloc] initWithLength: 0]; [data appendBytes: (const void *) buf length: len]; NSString * s = [[NSString alloc] initWithData: data encoding: NSASCIIStringEncoding]; [self readIn: s]; [data release] ;}} break;} default: {NSLog (@ "Stream is sending an Event: % I", event); break ;}}- (void) readIn :( NSString *) s {NSLog (@ "Reading in the following:"); NSLog (@ "% @", s) ;}- (void) writeOut :( NSString *) s {uint8_t * buf = (uint8_t *) [s UTF8String]; [outputStream write: buf maxLength: strlen (char *) buf)]; NSLog (@ "Writing out the following:"); NSLog (@ "% @", s) ;}@ end StreamExample. m [cpp] # import <Foundation/Foundation. h> # import "Communicator. h "int main (int argc, const char * argv []) {ngutoreleasepool * pool = [[ngutoreleasepool alloc] init]; Communicator * c = [Communicator alloc] init]; c-> host = @ "http: // 127.0.0.1"; c-> port = 6789; [c setup]; [c open]; [pool drain]; return 0 ;}