GV * Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) { GV *gv = gv_fetchmeth(stash, name, len, level); if (!gv) { char autoload[] = "AUTOLOAD"; STRLEN autolen = sizeof(autoload)-1; CV *cv; GV **gvp; if (!stash) return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */ if (len == autolen && strnEQ(name, autoload, autolen)) return Nullgv; if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) return Nullgv; cv = GvCV(gv); if (!(CvROOT(cv) || CvXSUB(cv))) return Nullgv; /* Have an autoload */ if (level < 0) /* Cannot do without a stub */ gv_fetchmeth(stash, name, len, 0); gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); if (!gvp) return Nullgv; return *gvp; } return gv; }
GV * Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) { register const char *nend; const char *nsplit = 0; GV* gv; for (nend = name; *nend; nend++) { if (*nend == '\'') nsplit = nend; else if (*nend == ':' && *(nend + 1) == ':') nsplit = ++nend; } if (nsplit) { const char *origname = name; name = nsplit + 1; if (*nsplit == ':') --nsplit; if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { /* ->SUPER::method should really be looked up in original stash */ SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", CopSTASHPV(PL_curcop))); stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", origname, HvNAME(stash), name) ); } else stash = gv_stashpvn(origname, nsplit - origname, TRUE); } gv = gv_fetchmeth(stash, name, nend - name, 0); if (!gv) { if (strEQ(name,"import") || strEQ(name,"unimport")) gv = (GV*)&PL_sv_yes; else if (autoload) gv = gv_autoload4(stash, name, nend - name, TRUE); } else if (autoload) { CV* cv = GvCV(gv); if (!CvROOT(cv) && !CvXSUB(cv)) { GV* stubgv; GV* autogv; if (CvANON(cv)) stubgv = gv; else { stubgv = CvGV(cv); if (GvCV(stubgv) != cv) /* orphaned import */ stubgv = gv; } autogv = gv_autoload4(GvSTASH(stubgv), GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); if (autogv) gv = autogv; } } return gv; }
GV* Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) { char autoload[] = "AUTOLOAD"; STRLEN autolen = sizeof(autoload)-1; GV* gv; CV* cv; HV* varstash; GV* vargv; SV* varsv; if (len == autolen && strnEQ(name, autoload, autolen)) return Nullgv; if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) return Nullgv; cv = GvCV(gv); if (!CvROOT(cv)) return Nullgv; /* * Inheriting AUTOLOAD for non-methods works ... for now. */ if (ckWARN(WARN_DEPRECATED) && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash)) Perl_warner(aTHX_ WARN_DEPRECATED, "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", HvNAME(stash), (int)len, name); /* * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. * The subroutine's original name may not be "AUTOLOAD", so we don't * use that, but for lack of anything better we will use the sub's * original package to look up $AUTOLOAD. */ varstash = GvSTASH(CvGV(cv)); vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); ENTER; #ifdef USE_THREADS sv_lock((SV *)varstash); #endif if (!isGV(vargv)) gv_init(vargv, varstash, autoload, autolen, FALSE); LEAVE; varsv = GvSV(vargv); #ifdef USE_THREADS sv_lock(varsv); #endif sv_setpv(varsv, HvNAME(stash)); sv_catpvn(varsv, "::", 2); sv_catpvn(varsv, name, len); SvTAINTED_off(varsv); return gv; }
CV * PerlIOVia_fetchmethod(pTHX_ PerlIOVia * s, char *method, CV ** save) { GV *gv = gv_fetchmeth(s->stash, method, strlen(method), 0); #if 0 Perl_warn(aTHX_ "Lookup %s::%s => %p", HvNAME(s->stash), method, gv); #endif if (gv) { return *save = GvCV(gv); } else { return *save = (CV *) - 1; } }
GV * Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) { AV* av; GV* topgv; GV* gv; GV** gvp; CV* cv; if (!stash) return 0; if ((level > 100) || (level < -100)) Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", name, HvNAME(stash)); DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) ); gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); if (!gvp) topgv = Nullgv; else { topgv = *gvp; if (SvTYPE(topgv) != SVt_PVGV) gv_init(topgv, stash, name, len, TRUE); if ((cv = GvCV(topgv))) { /* If genuine method or valid cache entry, use it */ if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) return topgv; /* Stale cached entry: junk it */ SvREFCNT_dec(cv); GvCV(topgv) = cv = Nullcv; GvCVGEN(topgv) = 0; } else if (GvCVGEN(topgv) == PL_sub_generation) return 0; /* cache indicates sub doesn't exist */ } gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; /* create and re-create @.*::SUPER::ISA on demand */ if (!av || !SvMAGIC(av)) { char* packname = HvNAME(stash); STRLEN packlen = strlen(packname); if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { HV* basestash; packlen -= 7; basestash = gv_stashpvn(packname, packlen, TRUE); gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); if (!gvp || !(gv = *gvp)) Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash)); if (SvTYPE(gv) != SVt_PVGV) gv_init(gv, stash, "ISA", 3, TRUE); SvREFCNT_dec(GvAV(gv)); GvAV(gv) = (AV*)SvREFCNT_inc(av); } } } if (av) { SV** svp = AvARRAY(av); /* NOTE: No support for tied ISA */ I32 items = AvFILLp(av) + 1; while (items--) { SV* sv = *svp++; HV* basestash = gv_stashsv(sv, FALSE); if (!basestash) { if (ckWARN(WARN_MISC)) Perl_warner(aTHX_ WARN_MISC, "Can't locate package %s for @%s::ISA", SvPVX(sv), HvNAME(stash)); continue; } gv = gv_fetchmeth(basestash, name, len, (level >= 0) ? level + 1 : level - 1); if (gv) goto gotcha; } } /* if at top level, try UNIVERSAL */ if (level == 0 || level == -1) { HV* lastchance; if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) { if ((gv = gv_fetchmeth(lastchance, name, len, (level >= 0) ? level + 1 : level - 1))) { gotcha: /* * Cache method in topgv if: * 1. topgv has no synonyms (else inheritance crosses wires) * 2. method isn't a stub (else AUTOLOAD fails spectacularly) */ if (topgv && GvREFCNT(topgv) == 1 && (cv = GvCV(gv)) && (CvROOT(cv) || CvXSUB(cv))) { if ((cv = GvCV(topgv))) SvREFCNT_dec(cv); GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); GvCVGEN(topgv) = PL_sub_generation; } return gv; } else if (topgv && GvREFCNT(topgv) == 1) { /* cache the fact that the method is not defined */ GvCVGEN(topgv) = PL_sub_generation; } } } return 0; }
GV* Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) { char autoload[] = "AUTOLOAD"; STRLEN autolen = sizeof(autoload)-1; GV* gv; CV* cv; HV* varstash; GV* vargv; SV* varsv; char *packname = ""; if (len == autolen && strnEQ(name, autoload, autolen)) return Nullgv; if (stash) { if (SvTYPE(stash) < SVt_PVHV) { packname = SvPV_nolen((SV*)stash); stash = Nullhv; } else { packname = HvNAME(stash); } } if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) return Nullgv; cv = GvCV(gv); if (!(CvROOT(cv) || CvXSUB(cv))) return Nullgv; /* * Inheriting AUTOLOAD for non-methods works ... for now. */ if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash)) Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", packname, (int)len, name); if (CvXSUB(cv)) { /* rather than lookup/init $AUTOLOAD here * only to have the XSUB do another lookup for $AUTOLOAD * and split that value on the last '::', * pass along the same data via some unused fields in the CV */ CvSTASH(cv) = stash; SvPVX(cv) = (char *)name; /* cast to lose constness warning */ SvCUR(cv) = len; return gv; } /* * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. * The subroutine's original name may not be "AUTOLOAD", so we don't * use that, but for lack of anything better we will use the sub's * original package to look up $AUTOLOAD. */ varstash = GvSTASH(CvGV(cv)); vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); ENTER; if (!isGV(vargv)) gv_init(vargv, varstash, autoload, autolen, FALSE); LEAVE; varsv = GvSV(vargv); sv_setpv(varsv, packname); sv_catpvn(varsv, "::", 2); sv_catpvn(varsv, name, len); SvTAINTED_off(varsv); return gv; }
GV * Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) { register const char *nend; const char *nsplit = 0; GV* gv; HV* ostash = stash; if (stash && SvTYPE(stash) < SVt_PVHV) stash = Nullhv; for (nend = name; *nend; nend++) { if (*nend == '\'') nsplit = nend; else if (*nend == ':' && *(nend + 1) == ':') nsplit = ++nend; } if (nsplit) { const char *origname = name; name = nsplit + 1; if (*nsplit == ':') --nsplit; if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { /* ->SUPER::method should really be looked up in original stash */ SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", CopSTASHPV(PL_curcop))); /* __PACKAGE__::SUPER stash should be autovivified */ stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", origname, HvNAME(stash), name) ); } else { /* don't autovifify if ->NoSuchStash::method */ stash = gv_stashpvn(origname, nsplit - origname, FALSE); /* however, explicit calls to Pkg::SUPER::method may happen, and may require autovivification to work */ if (!stash && (nsplit - origname) >= 7 && strnEQ(nsplit - 7, "::SUPER", 7) && gv_stashpvn(origname, nsplit - origname - 7, FALSE)) stash = gv_stashpvn(origname, nsplit - origname, TRUE); } ostash = stash; } gv = gv_fetchmeth(stash, name, nend - name, 0); if (!gv) { if (strEQ(name,"import") || strEQ(name,"unimport")) gv = (GV*)&PL_sv_yes; else if (autoload) gv = gv_autoload4(ostash, name, nend - name, TRUE); } else if (autoload) { CV* cv = GvCV(gv); if (!CvROOT(cv) && !CvXSUB(cv)) { GV* stubgv; GV* autogv; if (CvANON(cv)) stubgv = gv; else { stubgv = CvGV(cv); if (GvCV(stubgv) != cv) /* orphaned import */ stubgv = gv; } autogv = gv_autoload4(GvSTASH(stubgv), GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); if (autogv) gv = autogv; } } return gv; }