*(*s)++ = ch;
s[0] = ch;
ucs4_to_jisx0201 (wchar_t wch, char **s, size_t avail __attribute__ ((unused))){  char ch;  if (wch == 0xa5)    ch = '\x5c';  else if (wch == 0x203e)    ch = '\x7e';  else if (wch < 0x7e)    ch = wch;  else if (wch >= 0xff61 && wch <= 0xff9f)    ch = wch - 0xfec0;  else    return 0;  *(*s)++ = ch;  return 1;}