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/***************************************************************************
LineObject.m
-------------------
begin : Thu May 30 02:19:30 UTC 2002
copyright : (C) 2003 by Andy Ruder
email : aeruder@yahoo.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
/**
* <title>LineObject class reference</title>
* <author name="Andrew Ruder">
* <email address="aeruder@ksu.edu" />
* <url url="http://aeruder.gnustep.us/index.html" />
* </author>
* <version>Revision 1</version>
* <date>November 8, 2003</date>
* <copy>Andrew Ruder</copy>
*/
#import "LineObject.h"
#import <Foundation/NSData.h>
#import <Foundation/NSString.h>
#include <string.h>
static inline NSData *chomp_line(NSMutableData *data)
{
char *memory = [data mutableBytes];
char *memoryEnd = memory + [data length];
char *lineEndWithControls;
char *lineEnd;
int tempLength;
id lineData;
lineEndWithControls = lineEnd =
memchr(memory, '\n', memoryEnd - memory);
if (!lineEnd)
{
return nil;
}
while (((*lineEnd == '\n') || (*lineEnd == '\r'))
&& (lineEnd >= memory))
{
lineEnd--;
}
lineData = [NSData dataWithBytes: memory length: lineEnd - memory + 1];
tempLength = memoryEnd - lineEndWithControls - 1;
memmove(memory, lineEndWithControls + 1,
tempLength);
[data setLength: tempLength];
return lineData;
}
/**
* LineObject is used for line-buffered connections (end in \r\n or just \n).
* To use, simply override lineReceived: in a subclass of LineObject. By
* default, LineObject does absolutely nothing with lineReceived except throw
* the line away. Use line object if you simply want line-buffered input.
* This can be used on IRC, telnet, etc.
*/
@implementation LineObject
/**
* Cleans up the instance variables and closes/releases the transport.
*/
- (void)connectionLost
{
[transport close];
DESTROY(transport);
RELEASE(_readData);
}
/**
* Initializes data and retains <var>aTransport</var>
* <var>aTransport</var> should conform to the [(NetTransport)]
* protocol.
*/
- connectionEstablished: (id <NetTransport>)aTransport
{
transport = RETAIN(aTransport);
[[NetApplication sharedInstance] connectObject: self];
_readData = [NSMutableData new];
return self;
}
/**
* Adds the data to a buffer. Then calls -lineReceived: for all
* full lines currently in the buffer. Don't override this, override
* -lineReceived:.
*/
- dataReceived: (NSData *)newData
{
id newLine;
[_readData appendData: newData];
while ((newLine = chomp_line(_readData))) [self lineReceived: newLine];
return self;
}
/**
* Returns the transport
*/
- (id <NetTransport>)transport
{
return transport;
}
/**
* <override-subclass />
* <var>aLine</var> contains a full line of text (without the ending newline)
*/
- lineReceived: (NSData *)aLine
{
return self;
}
@end
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