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From:	Esa A E Peuha <esa DOT peuha AT helsinki DOT fi>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Bug in mbstowcs() in DJGPP's C library
Date:	25 Jun 2007 01:52:00 +0300
Organization:	University of Helsinki
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Simon Tatham <anakin AT pobox DOT com> writes:

> I believe mbstowcs() in DJGPP's C library is behaving incorrectly.
> It appears to be unwilling to fill its entire output buffer with
> non-zero wide characters, preferring to stop one character short of
> the end of the buffer

That's correct.

> and write a NUL.

But this isn't; from the current source

size_t
mbstowcs(wchar_t *wcs, const char *s, size_t n)
{
  size_t i;
  for (i=0; (i+1<n) && s[i]; i++)
    wcs[i] = s[i];
  if (i+1<n)
    wcs[i] = 0;
  return i;
}

it's obvious that the function simply treats its numeric argument as
one less than it actually is.

-- 
Esa Peuha
student of mathematics at the University of Helsinki
http://www.helsinki.fi/~peuha/

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