[Diggory Laycock]

Hi,

I am currently working on an application that extracts info from specific kinds of Binary files (which are encoded LittleEndian).

I have got Ints out of the Data fine - using CFSwapInt32LittleToHost or CFSwapInt16LittleToHost

However I am having problems extracting a String.
I know the offset into the data where the string is, and the length of the string:

Code:
        nameData = [symbianFileData subdataWithRange: NSMakeRange( componentNameOffset , componentNameSize) ];
        NSLog(@"nameData: %@", nameData);

gives:

Code:
	nameData: <4f007000 65007200 6100>

(notice the alternating 00s)

When I try to convert that data into a string however, I get a string separated by spaces:

Code:
            componentName = [[NSString alloc] initWithData: nameData encoding: NSNonLossyASCIIStringEncoding ];

gives:

Code:
componentName: O\\000p\\000e\\000r\\000a\\000

I've tried various NSStringEncodings - but they all end up the same (with the Spaces (\\000) between each character.)


Is this something to do with the fact that the original data is Little-Endian?

Do I need to do some kind of byteSwapping on the Data?


Thanks,
Diggory

[proton]

There's a lot of Unicode questions and answers here: http://www.unicode.org/unicode/faq/utf_bom.html

Note that UTF-8 strings do not need to be byte swapped at all. Ever. Other UTF formats may need it however.

- proton

[smeger]

Your string data looks like its Unichar16, not UTF8. Two bytes per character. Try using the method that creates an NSString using a buffer of unichars.

[Diggory Laycock]

Originally posted by smeger:
Your string data looks like its Unichar16, not UTF8. Two bytes per character. Try using the method that creates an NSString using a buffer of unichars.

You Star it worked! Thank-you very much.