Re: Getting a numerical rep of every byte of a UTF-8 string?

[Helge Hess]

On 17.03.2004, at 22:02, Christopher Culver wrote:
> If I have char * utf8String = [singleCharNSString UTF8String], how can 
> I get each byte of utf8String and display it as a hex number e.g. 
> 0x53? If anyone could show me working code, I would be most grateful. 
> Treating it as a normal C string doesn't seem to work. Once I see how 
> it's done I should be able to adapt it to displaying UTF-8 as octal.

Well, as mentioned in IRC, this should do:

  NSString      *s  = @"blah";
  unsigned char *cs = ;

  for (cs = [s UTF8String]; *cs != '\0'; cs++)
    printf("0x%02X", *cs);

Octal should be "%02o".

This might help with understanding what bytes you can expect in the 
output:
  http://www1.tip.nl/~t876506/utf8tbl.html

regards,
  Helge
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