Implementing NSString getBytes

[Luboš Doležel]

Hi,

GNUstep's NSString currently lacks 
getBytes:maxLength:usedLength:encoding:options:range:remainingRange:

(added in OS X 10.5).

I wanted to implement this function, but GSFromUnicode()'s behavior is 
not the best fit for this method:

1) it fails if the output buffer is too small - we don't want that in 
this case
2) it doesn't tell you how many input characters were converted (which 
is understandable because of 1)

So I decided to use iconv() directly, which has a pitfall. I'd need to 
access static members (EntrySupported) of Unicode.m to know the iconv 
encoding's name etc. So I guess the iconv-related code (as attached) 
should be moved into Unicode.m.

===============

So I have a question: is it OK to write a function with declaration:

BOOL GSFromUnicodePartial(NSStringEncoding enc, int options, unichar 
**inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft);

that wouldn't suffer from 1) and 2) and add it into 
Source/Additions/Unicode.m next to GSFromUnicode()?

--
Luboš Doležel

getBytes.patch
Description: Text Data