PERL_CALLCONV U32 Perl_to_uni_upper_lc(pTHX_ U32 c);
PERL_CALLCONV U32 Perl_to_uni_title_lc(pTHX_ U32 c);
PERL_CALLCONV U32 Perl_to_uni_lower_lc(pTHX_ U32 c);
+PERL_CALLCONV int Perl_is_utf8_char(pTHX_ U8 *p);
PERL_CALLCONV bool Perl_is_utf8_alnum(pTHX_ U8 *p);
PERL_CALLCONV bool Perl_is_utf8_alnumc(pTHX_ U8 *p);
PERL_CALLCONV bool Perl_is_utf8_idfirst(pTHX_ U8 *p);