3 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 * 2005, 2006, 2007, 2008 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * '"The roots of those mountains must be roots indeed; there must be
13 * great secrets buried there which have not been discovered since the
14 * beginning."' --Gandalf, relating Gollum's history
16 * [p.54 of _The Lord of the Rings_, I/ii: "The Shadow of the Past"]
19 /* This file contains the code that implements the functions in Perl's
20 * UNIVERSAL package, such as UNIVERSAL->can().
22 * It is also used to store XS functions that need to be present in
23 * miniperl for a lack of a better place to put them. It might be
24 * clever to move them to separate XS files which would then be pulled
25 * in by some to-be-written build process.
29 #define PERL_IN_UNIVERSAL_C
32 #if defined(USE_PERLIO)
33 #include "perliol.h" /* For the PERLIO_F_XXX */
37 * Contributed by Graham Barr <Graham.Barr@tiuk.ti.com>
38 * The main guts of traverse_isa was actually copied from gv_fetchmeth
42 S_isa_lookup(pTHX_ HV *stash, const char * const name, STRLEN len, U32 flags)
44 const struct mro_meta *const meta = HvMROMETA(stash);
48 PERL_ARGS_ASSERT_ISA_LOOKUP;
51 (void)mro_get_linear_isa(stash);
55 if (hv_common(isa, NULL, name, len, ( flags & SVf_UTF8 ? HVhek_UTF8 : 0),
56 HV_FETCH_ISEXISTS, NULL, 0)) {
57 /* Direct name lookup worked. */
61 /* A stash/class can go by many names (ie. User == main::User), so
62 we use the HvENAME in the stash itself, which is canonical, falling
63 back to HvNAME if necessary. */
64 our_stash = gv_stashpvn(name, len, flags);
67 HEK *canon_name = HvENAME_HEK(our_stash);
68 if (!canon_name) canon_name = HvNAME_HEK(our_stash);
70 if (hv_common(isa, NULL, HEK_KEY(canon_name), HEK_LEN(canon_name),
71 HEK_FLAGS(canon_name),
72 HV_FETCH_ISEXISTS, NULL, HEK_HASH(canon_name))) {
81 =head1 SV Manipulation Functions
83 =for apidoc sv_derived_from_pvn
85 Returns a boolean indicating whether the SV is derived from the specified class
86 I<at the C level>. To check derivation at the Perl level, call C<isa()> as a
89 Currently, the only significant value for C<flags> is SVf_UTF8.
93 =for apidoc sv_derived_from_sv
95 Exactly like L</sv_derived_from_pvn>, but takes the name string in the form
96 of an SV instead of a string/length pair.
103 Perl_sv_derived_from_sv(pTHX_ SV *sv, SV *namesv, U32 flags)
107 PERL_ARGS_ASSERT_SV_DERIVED_FROM_SV;
108 namepv = SvPV(namesv, namelen);
111 return sv_derived_from_pvn(sv, namepv, namelen, flags);
115 =for apidoc sv_derived_from
117 Exactly like L</sv_derived_from_pv>, but doesn't take a C<flags> parameter.
123 Perl_sv_derived_from(pTHX_ SV *sv, const char *const name)
125 PERL_ARGS_ASSERT_SV_DERIVED_FROM;
126 return sv_derived_from_pvn(sv, name, strlen(name), 0);
130 =for apidoc sv_derived_from_pv
132 Exactly like L</sv_derived_from_pvn>, but takes a nul-terminated string
133 instead of a string/length pair.
140 Perl_sv_derived_from_pv(pTHX_ SV *sv, const char *const name, U32 flags)
142 PERL_ARGS_ASSERT_SV_DERIVED_FROM_PV;
143 return sv_derived_from_pvn(sv, name, strlen(name), flags);
147 Perl_sv_derived_from_pvn(pTHX_ SV *sv, const char *const name, const STRLEN len, U32 flags)
151 PERL_ARGS_ASSERT_SV_DERIVED_FROM_PVN;
158 type = sv_reftype(sv,0);
159 if (type && strEQ(type,name))
166 stash = gv_stashsv(sv, 0);
169 if (stash && isa_lookup(stash, name, len, flags))
172 stash = gv_stashpvs("UNIVERSAL", 0);
173 return stash && isa_lookup(stash, name, len, flags);
177 =for apidoc sv_does_sv
179 Returns a boolean indicating whether the SV performs a specific, named role.
180 The SV can be a Perl object or the name of a Perl class.
188 Perl_sv_does_sv(pTHX_ SV *sv, SV *namesv, U32 flags)
195 PERL_ARGS_ASSERT_SV_DOES_SV;
196 PERL_UNUSED_ARG(flags);
203 if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) {
208 if (SvROK(sv) && SvOBJECT(SvRV(sv))) {
209 classname = sv_ref(NULL,SvRV(sv),TRUE);
214 if (sv_eq(classname, namesv)) {
225 methodname = newSVpvs_flags("isa", SVs_TEMP);
226 /* ugly hack: use the SvSCREAM flag so S_method_common
227 * can figure out we're calling DOES() and not isa(),
228 * and report eventual errors correctly. --rgs */
229 SvSCREAM_on(methodname);
230 call_sv(methodname, G_SCALAR | G_METHOD);
233 does_it = SvTRUE( TOPs );
243 Like L</sv_does_pv>, but doesn't take a C<flags> parameter.
249 Perl_sv_does(pTHX_ SV *sv, const char *const name)
251 PERL_ARGS_ASSERT_SV_DOES;
252 return sv_does_sv(sv, newSVpvn_flags(name, strlen(name), SVs_TEMP), 0);
256 =for apidoc sv_does_pv
258 Like L</sv_does_sv>, but takes a nul-terminated string instead of an SV.
265 Perl_sv_does_pv(pTHX_ SV *sv, const char *const name, U32 flags)
267 PERL_ARGS_ASSERT_SV_DOES_PV;
268 return sv_does_sv(sv, newSVpvn_flags(name, strlen(name), SVs_TEMP | flags), flags);
272 =for apidoc sv_does_pvn
274 Like L</sv_does_sv>, but takes a string/length pair instead of an SV.
280 Perl_sv_does_pvn(pTHX_ SV *sv, const char *const name, const STRLEN len, U32 flags)
282 PERL_ARGS_ASSERT_SV_DOES_PVN;
284 return sv_does_sv(sv, newSVpvn_flags(name, len, flags | SVs_TEMP), flags);
288 =for apidoc croak_xs_usage
290 A specialised variant of C<croak()> for emitting the usage message for xsubs
292 croak_xs_usage(cv, "eee_yow");
294 works out the package name and subroutine name from C<cv>, and then calls
295 C<croak()>. Hence if C<cv> is C<&ouch::awk>, it would call C<croak> as:
297 Perl_croak(aTHX_ "Usage: %"SVf"::%"SVf"(%s)", "ouch" "awk",
304 Perl_croak_xs_usage(const CV *const cv, const char *const params)
306 /* Avoid CvGV as it requires aTHX. */
307 const GV *gv = CvNAMED(cv) ? NULL : cv->sv_any->xcv_gv_u.xcv_gv;
309 PERL_ARGS_ASSERT_CROAK_XS_USAGE;
312 const HV *const stash = GvSTASH(gv);
314 if (HvNAME_get(stash))
315 /* diag_listed_as: SKIPME */
316 Perl_croak_nocontext("Usage: %"HEKf"::%"HEKf"(%s)",
317 HEKfARG(HvNAME_HEK(stash)),
318 HEKfARG(GvNAME_HEK(gv)),
321 /* diag_listed_as: SKIPME */
322 Perl_croak_nocontext("Usage: %"HEKf"(%s)",
323 HEKfARG(GvNAME_HEK(gv)), params);
326 if ((gv = CvGV(cv))) goto got_gv;
328 /* Pants. I don't think that it should be possible to get here. */
329 /* diag_listed_as: SKIPME */
330 Perl_croak(aTHX_ "Usage: CODE(0x%"UVxf")(%s)", PTR2UV(cv), params);
334 XS(XS_UNIVERSAL_isa); /* prototype to pass -Wmissing-prototypes */
340 croak_xs_usage(cv, "reference, kind");
342 SV * const sv = ST(0);
346 if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))))
349 ST(0) = boolSV(sv_derived_from_sv(sv, ST(1), 0));
354 XS(XS_UNIVERSAL_can); /* prototype to pass -Wmissing-prototypes */
364 croak_xs_usage(cv, "object-ref, method");
370 /* Reject undef and empty string. Note that the string form takes
371 precedence here over the numeric form, as (!1)->foo treats the
372 invocant as the empty string, though it is a dualvar. */
373 if (!SvOK(sv) || (SvPOK(sv) && !SvCUR(sv)))
379 sv = MUTABLE_SV(SvRV(sv));
382 else if (isGV_with_GP(sv) && GvIO(sv))
383 pkg = SvSTASH(GvIO(sv));
385 else if (isGV_with_GP(sv) && GvIO(sv))
386 pkg = SvSTASH(GvIO(sv));
387 else if ((iogv = gv_fetchsv_nomg(sv, 0, SVt_PVIO)) && GvIO(iogv))
388 pkg = SvSTASH(GvIO(iogv));
390 pkg = gv_stashsv(sv, 0);
392 pkg = gv_stashpvs("UNIVERSAL", 0);
396 GV * const gv = gv_fetchmethod_sv_flags(pkg, ST(1), 0);
398 rv = sv_2mortal(newRV(MUTABLE_SV(GvCV(gv))));
405 XS(XS_UNIVERSAL_DOES); /* prototype to pass -Wmissing-prototypes */
406 XS(XS_UNIVERSAL_DOES)
412 Perl_croak(aTHX_ "Usage: invocant->DOES(kind)");
414 SV * const sv = ST(0);
415 if (sv_does_sv( sv, ST(1), 0 ))
422 XS(XS_utf8_is_utf8); /* prototype to pass -Wmissing-prototypes */
427 croak_xs_usage(cv, "sv");
429 SV * const sv = ST(0);
439 XS(XS_utf8_valid); /* prototype to pass -Wmissing-prototypes */
444 croak_xs_usage(cv, "sv");
446 SV * const sv = ST(0);
448 const char * const s = SvPV_const(sv,len);
449 if (!SvUTF8(sv) || is_utf8_string((const U8*)s,len))
457 XS(XS_utf8_encode); /* prototype to pass -Wmissing-prototypes */
462 croak_xs_usage(cv, "sv");
463 sv_utf8_encode(ST(0));
468 XS(XS_utf8_decode); /* prototype to pass -Wmissing-prototypes */
473 croak_xs_usage(cv, "sv");
475 SV * const sv = ST(0);
477 SvPV_force_nolen(sv);
478 RETVAL = sv_utf8_decode(sv);
480 ST(0) = boolSV(RETVAL);
485 XS(XS_utf8_upgrade); /* prototype to pass -Wmissing-prototypes */
490 croak_xs_usage(cv, "sv");
492 SV * const sv = ST(0);
496 RETVAL = sv_utf8_upgrade(sv);
497 XSprePUSH; PUSHi((IV)RETVAL);
502 XS(XS_utf8_downgrade); /* prototype to pass -Wmissing-prototypes */
503 XS(XS_utf8_downgrade)
506 if (items < 1 || items > 2)
507 croak_xs_usage(cv, "sv, failok=0");
509 SV * const sv = ST(0);
510 const bool failok = (items < 2) ? 0 : SvTRUE(ST(1)) ? 1 : 0;
511 const bool RETVAL = sv_utf8_downgrade(sv, failok);
513 ST(0) = boolSV(RETVAL);
518 XS(XS_utf8_native_to_unicode); /* prototype to pass -Wmissing-prototypes */
519 XS(XS_utf8_native_to_unicode)
522 const UV uv = SvUV(ST(0));
525 croak_xs_usage(cv, "sv");
527 ST(0) = sv_2mortal(newSVuv(NATIVE_TO_UNI(uv)));
531 XS(XS_utf8_unicode_to_native); /* prototype to pass -Wmissing-prototypes */
532 XS(XS_utf8_unicode_to_native)
535 const UV uv = SvUV(ST(0));
538 croak_xs_usage(cv, "sv");
540 ST(0) = sv_2mortal(newSVuv(UNI_TO_NATIVE(uv)));
544 XS(XS_Internals_SvREADONLY); /* prototype to pass -Wmissing-prototypes */
545 XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */
548 SV * const svz = ST(0);
552 /* [perl #77776] - called as &foo() not foo() */
554 croak_xs_usage(cv, "SCALAR[, ON]");
564 else if (items == 2) {
566 SvFLAGS(sv) |= SVf_READONLY;
570 /* I hope you really know what you are doing. */
571 SvFLAGS(sv) &=~ SVf_READONLY;
575 XSRETURN_UNDEF; /* Can't happen. */
578 XS(XS_constant__make_const); /* prototype to pass -Wmissing-prototypes */
579 XS(XS_constant__make_const) /* This is dangerous stuff. */
582 SV * const svz = ST(0);
586 /* [perl #77776] - called as &foo() not foo() */
587 if (!SvROK(svz) || items != 1)
588 croak_xs_usage(cv, "SCALAR");
593 if (SvTYPE(sv) == SVt_PVAV && AvFILLp(sv) != -1) {
594 /* for constant.pm; nobody else should be calling this
597 for (svp = AvARRAY(sv) + AvFILLp(sv)
600 if (*svp) SvPADTMP_on(*svp);
605 XS(XS_Internals_SvREFCNT); /* prototype to pass -Wmissing-prototypes */
606 XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */
609 SV * const svz = ST(0);
614 /* [perl #77776] - called as &foo() not foo() */
615 if ((items != 1 && items != 2) || !SvROK(svz))
616 croak_xs_usage(cv, "SCALAR[, REFCOUNT]");
620 /* I hope you really know what you are doing. */
621 /* idea is for SvREFCNT(sv) to be accessed only once */
622 refcnt = items == 2 ?
623 /* we free one ref on exit */
624 (SvREFCNT(sv) = SvUV(ST(1)) + 1)
626 XSRETURN_UV(refcnt - 1); /* Minus the ref created for us. */
630 XS(XS_Internals_hv_clear_placehold); /* prototype to pass -Wmissing-prototypes */
631 XS(XS_Internals_hv_clear_placehold)
635 if (items != 1 || !SvROK(ST(0)))
636 croak_xs_usage(cv, "hv");
638 HV * const hv = MUTABLE_HV(SvRV(ST(0)));
639 hv_clear_placeholders(hv);
644 XS(XS_PerlIO_get_layers); /* prototype to pass -Wmissing-prototypes */
645 XS(XS_PerlIO_get_layers)
648 if (items < 1 || items % 2 == 0)
649 croak_xs_usage(cv, "filehandle[,args]");
650 #if defined(USE_PERLIO)
656 bool details = FALSE;
660 for (svp = MARK + 2; svp <= SP; svp += 2) {
661 SV * const * const varp = svp;
662 SV * const * const valp = svp + 1;
664 const char * const key = SvPV_const(*varp, klen);
668 if (klen == 5 && memEQ(key, "input", 5)) {
669 input = SvTRUE(*valp);
674 if (klen == 6 && memEQ(key, "output", 6)) {
675 input = !SvTRUE(*valp);
680 if (klen == 7 && memEQ(key, "details", 7)) {
681 details = SvTRUE(*valp);
688 "get_layers: unknown argument '%s'",
697 gv = MAYBE_DEREF_GV(sv);
699 if (!gv && !SvROK(sv))
700 gv = gv_fetchsv_nomg(sv, 0, SVt_PVIO);
702 if (gv && (io = GvIO(gv))) {
703 AV* const av = PerlIO_get_layers(aTHX_ input ?
704 IoIFP(io) : IoOFP(io));
706 const SSize_t last = av_tindex(av);
709 for (i = last; i >= 0; i -= 3) {
710 SV * const * const namsvp = av_fetch(av, i - 2, FALSE);
711 SV * const * const argsvp = av_fetch(av, i - 1, FALSE);
712 SV * const * const flgsvp = av_fetch(av, i, FALSE);
714 const bool namok = namsvp && *namsvp && SvPOK(*namsvp);
715 const bool argok = argsvp && *argsvp && SvPOK(*argsvp);
716 const bool flgok = flgsvp && *flgsvp && SvIOK(*flgsvp);
718 EXTEND(SP, 3); /* Three is the max in all branches: better check just once */
720 /* Indents of 5? Yuck. */
721 /* We know that PerlIO_get_layers creates a new SV for
722 the name and flags, so we can just take a reference
723 and "steal" it when we free the AV below. */
725 ? sv_2mortal(SvREFCNT_inc_simple_NN(*namsvp))
728 ? newSVpvn_flags(SvPVX_const(*argsvp),
730 (SvUTF8(*argsvp) ? SVf_UTF8 : 0)
734 ? sv_2mortal(SvREFCNT_inc_simple_NN(*flgsvp))
740 PUSHs(sv_2mortal(Perl_newSVpvf(aTHX_ "%"SVf"(%"SVf")",
744 PUSHs(sv_2mortal(SvREFCNT_inc_simple_NN(*namsvp)));
749 const IV flags = SvIVX(*flgsvp);
751 if (flags & PERLIO_F_UTF8) {
752 PUSHs(newSVpvs_flags("utf8", SVs_TEMP));
770 XS(XS_re_is_regexp); /* prototype to pass -Wmissing-prototypes */
777 croak_xs_usage(cv, "sv");
786 XS(XS_re_regnames_count); /* prototype to pass -Wmissing-prototypes */
787 XS(XS_re_regnames_count)
789 REGEXP *rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
794 croak_xs_usage(cv, "");
802 ret = CALLREG_NAMED_BUFF_COUNT(rx);
805 PUSHs(ret ? sv_2mortal(ret) : &PL_sv_undef);
809 XS(XS_re_regname); /* prototype to pass -Wmissing-prototypes */
817 if (items < 1 || items > 2)
818 croak_xs_usage(cv, "name[, all ]");
823 rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
828 if (items == 2 && SvTRUE(ST(1))) {
833 ret = CALLREG_NAMED_BUFF_FETCH(rx, ST(0), (flags | RXapif_REGNAME));
836 PUSHs(ret ? sv_2mortal(ret) : &PL_sv_undef);
841 XS(XS_re_regnames); /* prototype to pass -Wmissing-prototypes */
854 croak_xs_usage(cv, "[all]");
856 rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
861 if (items == 1 && SvTRUE(ST(0))) {
870 ret = CALLREG_NAMED_BUFF_ALL(rx, (flags | RXapif_REGNAMES));
877 av = MUTABLE_AV(SvRV(ret));
878 length = av_tindex(av);
880 EXTEND(SP, length+1); /* better extend stack just once */
881 for (i = 0; i <= length; i++) {
882 entry = av_fetch(av, i, FALSE);
885 Perl_croak(aTHX_ "NULL array element in re::regnames()");
887 mPUSHs(SvREFCNT_inc_simple_NN(*entry));
896 XS(XS_re_regexp_pattern); /* prototype to pass -Wmissing-prototypes */
897 XS(XS_re_regexp_pattern)
901 U8 const gimme = GIMME_V;
906 croak_xs_usage(cv, "sv");
909 Checks if a reference is a regex or not. If the parameter is
910 not a ref, or is not the result of a qr// then returns false
911 in scalar context and an empty list in list context.
912 Otherwise in list context it returns the pattern and the
913 modifiers, in scalar context it returns the pattern just as it
914 would if the qr// was stringified normally, regardless as
915 to the class of the variable and any stringification overloads
919 if ((re = SvRX(ST(0)))) /* assign deliberate */
921 /* Houston, we have a regex! */
924 if ( gimme == G_ARRAY ) {
926 char reflags[sizeof(INT_PAT_MODS) + MAX_CHARSET_NAME_LENGTH];
932 we are in list context so stringify
933 the modifiers that apply. We ignore "negative
934 modifiers" in this scenario, and the default character set
937 if (get_regex_charset(RX_EXTFLAGS(re)) != REGEX_DEPENDS_CHARSET) {
939 const char* const name = get_regex_charset_name(RX_EXTFLAGS(re),
941 Copy(name, reflags + left, len, char);
945 match_flags = (U16)((RX_EXTFLAGS(re) & RXf_PMf_COMPILETIME)
946 >> RXf_PMf_STD_PMMOD_SHIFT);
948 while((ch = *fptr++)) {
949 if(match_flags & 1) {
950 reflags[left++] = ch;
955 pattern = newSVpvn_flags(RX_PRECOMP(re),RX_PRELEN(re),
956 (RX_UTF8(re) ? SVf_UTF8 : 0) | SVs_TEMP);
958 /* return the pattern and the modifiers */
960 PUSHs(newSVpvn_flags(reflags, left, SVs_TEMP));
963 /* Scalar, so use the string that Perl would return */
964 /* return the pattern in (?msixn:..) format */
965 #if PERL_VERSION >= 11
966 pattern = sv_2mortal(newSVsv(MUTABLE_SV(re)));
968 pattern = newSVpvn_flags(RX_WRAPPED(re), RX_WRAPLEN(re),
969 (RX_UTF8(re) ? SVf_UTF8 : 0) | SVs_TEMP);
975 /* It ain't a regexp folks */
976 if ( gimme == G_ARRAY ) {
977 /* return the empty list */
980 /* Because of the (?:..) wrapping involved in a
981 stringified pattern it is impossible to get a
982 result for a real regexp that would evaluate to
983 false. Therefore we can return PL_sv_no to signify
984 that the object is not a regex, this means that one
987 if (regex($might_be_a_regex) eq '(?:foo)') { }
989 and not worry about undefined values.
994 NOT_REACHED; /* NOTREACHED */
1000 struct xsub_details {
1006 static const struct xsub_details details[] = {
1007 {"UNIVERSAL::isa", XS_UNIVERSAL_isa, NULL},
1008 {"UNIVERSAL::can", XS_UNIVERSAL_can, NULL},
1009 {"UNIVERSAL::DOES", XS_UNIVERSAL_DOES, NULL},
1010 #define VXS_XSUB_DETAILS
1012 #undef VXS_XSUB_DETAILS
1013 {"utf8::is_utf8", XS_utf8_is_utf8, NULL},
1014 {"utf8::valid", XS_utf8_valid, NULL},
1015 {"utf8::encode", XS_utf8_encode, NULL},
1016 {"utf8::decode", XS_utf8_decode, NULL},
1017 {"utf8::upgrade", XS_utf8_upgrade, NULL},
1018 {"utf8::downgrade", XS_utf8_downgrade, NULL},
1019 {"utf8::native_to_unicode", XS_utf8_native_to_unicode, NULL},
1020 {"utf8::unicode_to_native", XS_utf8_unicode_to_native, NULL},
1021 {"Internals::SvREADONLY", XS_Internals_SvREADONLY, "\\[$%@];$"},
1022 {"constant::_make_const", XS_constant__make_const, "\\[$@]"},
1023 {"Internals::SvREFCNT", XS_Internals_SvREFCNT, "\\[$%@];$"},
1024 {"Internals::hv_clear_placeholders", XS_Internals_hv_clear_placehold, "\\%"},
1025 {"PerlIO::get_layers", XS_PerlIO_get_layers, "*;@"},
1026 {"re::is_regexp", XS_re_is_regexp, "$"},
1027 {"re::regname", XS_re_regname, ";$$"},
1028 {"re::regnames", XS_re_regnames, ";$"},
1029 {"re::regnames_count", XS_re_regnames_count, ""},
1030 {"re::regexp_pattern", XS_re_regexp_pattern, "$"},
1034 optimize_out_native_convert_function(pTHX_ OP* entersubop,
1038 /* Optimizes out an identity function, i.e., one that just returns its
1039 * argument. The passed in function is assumed to be an identity function,
1040 * with no checking. This is designed to be called for utf8_to_native()
1041 * and native_to_utf8() on ASCII platforms, as they just return their
1042 * arguments, but it could work on any such function.
1044 * The code is mostly just cargo-culted from Memoize::Lift */
1048 SV* prototype = newSVpvs("$");
1050 PERL_UNUSED_ARG(protosv);
1052 assert(entersubop->op_type == OP_ENTERSUB);
1054 entersubop = ck_entersub_args_proto(entersubop, namegv, prototype);
1055 parent = entersubop;
1057 SvREFCNT_dec(prototype);
1059 pushop = cUNOPx(entersubop)->op_first;
1060 if (! OpHAS_SIBLING(pushop)) {
1062 pushop = cUNOPx(pushop)->op_first;
1064 argop = OpSIBLING(pushop);
1066 /* Carry on without doing the optimization if it is not something we're
1067 * expecting, so continues to work */
1069 || ! OpHAS_SIBLING(argop)
1070 || OpHAS_SIBLING(OpSIBLING(argop))
1075 /* cut argop from the subtree */
1076 (void)op_sibling_splice(parent, pushop, 1, NULL);
1078 op_free(entersubop);
1083 Perl_boot_core_UNIVERSAL(pTHX)
1085 static const char file[] = __FILE__;
1086 const struct xsub_details *xsub = details;
1087 const struct xsub_details *end = C_ARRAY_END(details);
1090 newXS_flags(xsub->name, xsub->xsub, file, xsub->proto, 0);
1091 } while (++xsub < end);
1094 { /* On ASCII platforms these functions just return their argument, so can
1095 be optimized away */
1097 CV* to_native_cv = get_cv("utf8::unicode_to_native", 0);
1098 CV* to_unicode_cv = get_cv("utf8::native_to_unicode", 0);
1100 cv_set_call_checker(to_native_cv,
1101 optimize_out_native_convert_function,
1102 (SV*) to_native_cv);
1103 cv_set_call_checker(to_unicode_cv,
1104 optimize_out_native_convert_function,
1105 (SV*) to_unicode_cv);
1109 /* Providing a Regexp::DESTROY fixes #21347. See test in t/op/ref.t */
1112 newCONSTSUB(get_hv("Regexp::", GV_ADD), "DESTROY", NULL);
1113 char ** cvfile = &CvFILE(cv);
1114 char * oldfile = *cvfile;
1116 *cvfile = (char *)file;
1122 * ex: set ts=8 sts=4 sw=4 et: