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Date: Mon, 20 Jul 2009 05:15:12 -0600
From: Eric Blake <ebb9@byu.net>
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To: cygwin@cygwin.com, newlib@sources.redhat.com
Subject: mbrtowc bug
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The gnulib unit tests are declaring that cygwin's mbrtowc is broken.  STC:

#include <locale.h>
#include <string.h>
#include <wchar.h>
int main ()
{
  if (setlocale (LC_ALL, "ja_JP.eucJP") != NULL)
    {
      char input[] = "B\217\253\344\217\251\316er";

      mbstate_t state;
      wchar_t wc;

      memset (&state, '\0', sizeof (mbstate_t));
      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
        {
          input[1] = '\0';
          if (mbrtowc (&wc, input + 2, 5, &state) != 2)
            return 1;
        }
    }
  return 0;
}


According to Bruno Haible[1], the bug is in the __eucjp_wctomb and
__eucjp_mbtowc implementations.

[1] http://lists.gnu.org/archive/html/bug-gnulib/2009-07/msg00051.html

- --
Don't work too hard, make some time for fun as well!

Eric Blake             ebb9@byu.net
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