Initial import of Cocoa code

cocoa/NCCurrentCost.m

@@ -0,0 +1,154 @@
+//
+//  CCSerialPort.m
+//  CCSerialPort
+//
+//  Created by Neil on 02/12/2008.
+//  Copyright 2008 Neil Cowburn. All rights reserved.
+//
+
+#import "NCCurrentCost.h"
+
+@implementation NCCurrentCost
+
+@synthesize delegate;
+
+#pragma mark Constructors and destructors
+
+- (id)init:(NSString *)path withBaudRate:(int)baudRate
+{
+	if (self = [super init]) {
+		bsdPath = [path copy];
+		baud = baudRate;
+			
+		options = (struct termios*)malloc(sizeof(*options));
+		originalOptions = (struct termios*)malloc(sizeof(*originalOptions));
+	}
+	
+	return self;
+}
+
+- (void)dealloc 
+{
+	[self close];
+	
+	free(originalOptions);
+	free(options);
+	
+	[serviceType release];
+	[serviceName release];
+	[bsdPath release];
+	
+	[super dealloc];
+}
+
+#pragma mark Public Methods
+
+- (void)open
+{
+	const char *path = [bsdPath fileSystemRepresentation];
+	
+	fd = open(path, O_RDONLY | O_NOCTTY);
+	if (fd == -1) {
+		// Error opening the serial port
+		NSLog(@"Error opening serial port");
+		return;
+	}
+	
+	if (tcgetattr(fd, originalOptions) == -1) {
+		// Error getting options
+		NSLog(@"Error getting options");
+		return;
+	}
+	
+	*options = *originalOptions;
+	handle = [[NSFileHandle alloc] initWithFileDescriptor:fd];
+	
+	// Set the baud rate to 2400 bps
+	cfsetspeed(options, B2400);
+	
+	options->c_cc[VMIN] = 1;
+    options->c_cc[VTIME] = 10;
+	
+	// 8 data bits
+	options->c_cflag |= CS8;
+	
+	// No parity
+	options->c_cflag &= ~PARENB;
+	
+	// One stop bit
+	options->c_cflag &= ~CSTOPB;
+	
+	// No flow control
+	options->c_cflag &= ~(IXON | IXOFF | IXANY);
+	
+	if (tcsetattr(fd,TCSANOW, options) != 0) {
+		// Error setting options
+		NSLog(@"Error setting options");
+		return;
+	}
+	
+}
+
+- (void)close
+{
+	fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK);
+	
+	[handle closeFile];
+	[handle release];
+	handle = nil;
+	
+	close(fd);
+	fd = -1;
+}
+
+ - (void)read
+{
+	char    buffer[MAX_CC_BUFFER_SIZE];	
+    char    *bufPtr;					
+    ssize_t numBytes;					
+	
+	memset(&buffer, 0, sizeof(buffer));
+	bufPtr = buffer;
+	
+	do
+	{
+		numBytes = read(fd, bufPtr, MAX_CC_BUFFER_SIZE);
+		if (numBytes > 0)
+		{
+			bufPtr += numBytes;
+			
+			if (*(bufPtr - 1) == '\n')
+			{
+				NSRange range = [[NSString stringWithUTF8String:buffer] rangeOfString:@"\n"];
+				
+				if ([delegate respondsToSelector:@selector(dataWasReceived:)]) {
+					NSData *rawData  = [[NSData alloc] initWithBytes:buffer length:range.location];
+					NSXMLDocument *xml = [[NSXMLDocument alloc] initWithData:rawData options:0 error:nil];
+
+					if (xml != nil) {
+						[delegate performSelectorOnMainThread:@selector(dataWasReceived:) withObject:xml waitUntilDone:YES];
+					}
+					
+					[xml release];
+					[rawData release];
+				}
+				
+#ifdef CCDEBUG
+				NSString *sentence = [data substringToIndex:range.location - 1];
+				NSLog(@"%@", sentence);				
+				[sentence release];
+#endif
+				break;
+			}
+		}
+	} while (numBytes > 0);
+}
+
+- (void)setDelegate:(id)newDelegate
+{
+	[newDelegate retain];
+	[delegate release];
+	delegate = newDelegate;
+}
+
+@end