new

static VALUE
iconv_initialize(int argc, VALUE *argv, VALUE self)
{
    VALUE to, from, options;
    struct rb_iconv_opt_t opt;
    int idx;

    rb_scan_args(argc, argv, "21", &to, &from, &options);
    get_iconv_opt(&opt, options);
    iconv_free(check_iconv(self));
    DATA_PTR(self) = NULL;
    DATA_PTR(self) = (void *)ICONV2VALUE(iconv_create(to, from, &opt, &idx));
    if (idx >= 0) ENCODING_SET(self, idx);
    return self;
}