Re: Need help with serialization/deserialization interface.

[Renaud Molla]

Hi Tima,
	I know this may not be "pure" OpenStep, but did you check Apple's  
"Stream Programming Guide for Cocoa" at
	http://developer.apple.com/documentation/Cocoa/Conceptual/Streams/ 
index.html?http://developer.apple.com/documentation/Cocoa/Conceptual/ 
Streams/Articles/CocoaStreamsOverview.html

	I think you can read bytes from the stream using the NSInputStream  
subclass,
        the - (BOOL)getBuffer:(uint8_t **)buffer length:(unsigned int *)len
        and - (int)read:(uint8_t *)buffer maxLength:(unsigned int)len
        methods seem quite interesting.

	If I had to read a stream then I'd go this way, but this is a  
personal opinion.

Renaud.

On Jan 21, 2007, at 11:28 PM, Tima wrote:

> Hi list,
>
> I'm going to write a serializer/decerialiser pair of procedures for  
> a data
> description format (more specifically, for JSON, see http:// 
> json.org and http://json-rpc.org ).
>
> BJSONAdditions (http://blakeseely.com/blog/archives/2006/03/29/ 
> bsjsonadditions-12/,
> the lates version is actually 1.3 at http://blakeseely.com/source/ 
> BJSONAdditions.zip )
> suggests
>
>
> @interface NSDictionary (BSJSONAdditions)
>
> + (NSDictionary *)dictionaryWithJSONString:(NSString *)jsonString;
> - (NSString *)jsonStringValue;
>
> @end
>
> One thing I do not understand is: is it the best to read from  
> NSString?
>
> Most of the time JSON will be read from stream socket, sometimes  
> from file,
> therefore I was seeking for some universal object that provides per- 
> character read
> access without requiring any knowledge of the media.
>
> In C++ there are input and output streams (<iostream>) that are  
> widely used for
> I/O when a programmer wants to detach the API from a particular media.
>
> I was reading about NSStream and its subclasses and got confused. I  
> realized I can get
> them for socket, file or memory buffer, but I did not realize how  
> to use them for
> per-character input or output.
>
> What is the recommended way to do buffered I/O in NextStep?
>
> Thanks a lot,
> Tima
>
>
>
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