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#include <stdlib.h>

#include <wchar.h>

size_t

_DEFUN (_wcstombs_r, (reent, s, pwcs, n, state),

        struct _reent *r    _AND

        char          *s    _AND

        const wchar_t *pwcs _AND

        size_t         n    _AND

        mbstate_t     *state)

{

  char *ptr = s;

  size_t max = n;

  char buff[8];

  int i, num_to_copy;

  if (s == NULL)

    {

      size_t num_bytes = 0;

      while (*pwcs != 0)

         num_bytes += _wctomb_r (r, buff, *pwcs++, state);

      return num_bytes;

    }

  else

    {

      while (n > 0)

        {

          int bytes = _wctomb_r (r, buff, *pwcs, state);

          if (bytes == -1)

            return -1;

          num_to_copy = (n > bytes ? bytes : (int)n);

          for (i = 0; i < num_to_copy; ++i)

            *ptr++ = buff[i];

          if (*pwcs == 0x00)

            return ptr - s - (n >= bytes);

          ++pwcs;

          n -= num_to_copy;

        }

      return max;

    }

}