PERL_CALLCONV void Perl_save_pptr(pTHX_ char** pptr);
PERL_CALLCONV void Perl_save_vptr(pTHX_ void* pptr);
PERL_CALLCONV void Perl_save_re_context(pTHX);
+PERL_CALLCONV void Perl_save_padsv(pTHX_ PADOFFSET off);
PERL_CALLCONV void Perl_save_sptr(pTHX_ SV** sptr);
PERL_CALLCONV SV* Perl_save_svref(pTHX_ SV** sptr);
PERL_CALLCONV SV** Perl_save_threadsv(pTHX_ PADOFFSET i);
PERL_CALLCONV void Perl_utilize(pTHX_ int aver, I32 floor, OP* version, OP* id, OP* arg);
PERL_CALLCONV U8* Perl_utf16_to_utf8(pTHX_ U8* p, U8 *d, I32 bytelen, I32 *newlen);
PERL_CALLCONV U8* Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8 *d, I32 bytelen, I32 *newlen);
-PERL_CALLCONV I32 Perl_utf8_distance(pTHX_ U8 *a, U8 *b);
+PERL_CALLCONV STRLEN Perl_utf8_length(pTHX_ U8* s, U8 *e);
+PERL_CALLCONV IV Perl_utf8_distance(pTHX_ U8 *a, U8 *b);
PERL_CALLCONV U8* Perl_utf8_hop(pTHX_ U8 *s, I32 off);
PERL_CALLCONV U8* Perl_utf8_to_bytes(pTHX_ U8 *s, STRLEN *len);
PERL_CALLCONV U8* Perl_bytes_to_utf8(pTHX_ U8 *s, STRLEN *len);