[ECOS] wcstombs

[Klaas Gadeyne]

On Wed, 9 Aug 2006, Jonathan Larmour wrote:
> Klaas Gadeyne wrote:
>> So the next question: Is there reason why the implementation is not
>> conform the Single unix spec?
>
> The short answer: eCos is not UNIX.
>
> The longer answer: eCos does try to comply with C90 and C99 (although it 
> doesn't by a long way with the latter), and selected parts of POSIX. UNIX 
> compatibility is a "would be nice" thing, but not if it means adding bells 
> and whistles that just bloat code until eCos slowly grows to be the size of 
> UNIX. Therefore bells and whistles that only exist in the SUS are unlikely to 
> be implemented.

Then, only for those who are interested:  The following patch works fine
for me (without too much code bloat I hope :-), but please check...

  cvs diff wcstombs.cxx
Index: wcstombs.cxx
===================================================================
RCS file:
/cvs/ecos/ecos/packages/language/c/libc/i18n/current/src/wcstombs.cxx,v
retrieving revision 1.3
diff -r1.3 wcstombs.cxx
88c88
< <[s]> is <<NULL>> or is the empty string;
---
> <[s]> is the empty string;
196,202c196,209
<
<   if (n != 0) {
<     do {
<       if ((*s++ = (char) *pwcs++) == 0)
<       break;
<       count++;
<     } while (--n != 0);
---
>
>   if (s == NULL){
>       while (*pwcs++ != 0){
>           count++;
>       }
>   }
>   else {
>       if (n != 0) {
>           do {
>               if ((*s++ = (char) *pwcs++) == 0)
>                   break;
>               count++;
>           } while (--n != 0);
>       }

Klaas

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