big5_to_iso
n = big5_to_iso(st, unidx, cnscode,
int big5_to_iso(_iconv_st * st, int unidx, unsigned long cnscode, char * buf,
n = big5_to_iso(plane_no, unidx, cnscode,
static int big5_to_iso(int, int, unsigned long, char*, size_t);
n = big5_to_iso(idx, st, outbuf, outbytesleft);
static int big5_to_iso(int, _iconv_st*, char**, size_t*);