X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/d3f7f2b292e54c14f8b24c9e784edc6ace9d7abf..2a3d532f608c7c5e0c317bfba640d088125b93a3:/universal.c diff --git a/universal.c b/universal.c index 28e0896..ae12e27 100644 --- a/universal.c +++ b/universal.c @@ -1,3 +1,18 @@ +/* universal.c + * + * Copyright (c) 1997-2002, Larry Wall + * + * You may distribute under the terms of either the GNU General Public + * License or the Artistic License, as specified in the README file. + * + */ + +/* + * "The roots of those mountains must be roots indeed; there must be + * great secrets buried there which have not been discovered since the + * beginning." --Gandalf, relating Gollum's story + */ + #include "EXTERN.h" #define PERL_IN_UNIVERSAL_C #include "perl.h" @@ -8,35 +23,53 @@ */ STATIC SV * -S_isa_lookup(pTHX_ HV *stash, const char *name, int len, int level) +S_isa_lookup(pTHX_ HV *stash, const char *name, HV* name_stash, + int len, int level) { AV* av; GV* gv; GV** gvp; HV* hv = Nullhv; + SV* subgen = Nullsv; - if (!stash) - return &PL_sv_undef; + /* A stash/class can go by many names (ie. User == main::User), so + we compare the stash itself just in case */ + if (name_stash && (stash == name_stash)) + return &PL_sv_yes; - if(strEQ(HvNAME(stash), name)) + if (strEQ(HvNAME(stash), name)) return &PL_sv_yes; if (level > 100) - Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", HvNAME(stash)); + Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", + HvNAME(stash)); gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, FALSE); - if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv))) { - SV* sv; - SV** svp = (SV**)hv_fetch(hv, name, len, FALSE); - if (svp && (sv = *svp) != (SV*)&PL_sv_undef) - return sv; + if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (subgen = GvSV(gv)) + && (hv = GvHV(gv))) + { + if (SvIV(subgen) == PL_sub_generation) { + SV* sv; + SV** svp = (SV**)hv_fetch(hv, name, len, FALSE); + if (svp && (sv = *svp) != (SV*)&PL_sv_undef) { + DEBUG_o( Perl_deb(aTHX_ "Using cached ISA %s for package %s\n", + name, HvNAME(stash)) ); + return sv; + } + } + else { + DEBUG_o( Perl_deb(aTHX_ "ISA Cache in package %s is stale\n", + HvNAME(stash)) ); + hv_clear(hv); + sv_setiv(subgen, PL_sub_generation); + } } gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE); - + if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { - if(!hv) { + if (!hv || !subgen) { gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, TRUE); gv = *gvp; @@ -44,9 +77,14 @@ S_isa_lookup(pTHX_ HV *stash, const char *name, int len, int level) if (SvTYPE(gv) != SVt_PVGV) gv_init(gv, stash, "::ISA::CACHE::", 14, TRUE); - hv = GvHVn(gv); + if (!hv) + hv = GvHVn(gv); + if (!subgen) { + subgen = newSViv(PL_sub_generation); + GvSV(gv) = subgen; + } } - if(hv) { + if (hv) { SV** svp = AvARRAY(av); /* NOTE: No support for tied ISA */ I32 items = AvFILLp(av) + 1; @@ -54,14 +92,14 @@ S_isa_lookup(pTHX_ HV *stash, const char *name, int len, int level) SV* sv = *svp++; HV* basestash = gv_stashsv(sv, FALSE); if (!basestash) { - dTHR; if (ckWARN(WARN_MISC)) - Perl_warner(aTHX_ WARN_SYNTAX, + Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Can't locate package %s for @%s::ISA", SvPVX(sv), HvNAME(stash)); continue; } - if(&PL_sv_yes == isa_lookup(basestash, name, len, level + 1)) { + if (&PL_sv_yes == isa_lookup(basestash, name, name_stash, + len, level + 1)) { (void)hv_store(hv,name,len,&PL_sv_yes,0); return &PL_sv_yes; } @@ -74,6 +112,8 @@ S_isa_lookup(pTHX_ HV *stash, const char *name, int len, int level) } /* +=head1 SV Manipulation Functions + =for apidoc sv_derived_from Returns a boolean indicating whether the SV is derived from the specified @@ -88,32 +128,45 @@ Perl_sv_derived_from(pTHX_ SV *sv, const char *name) { char *type; HV *stash; - + HV *name_stash; + stash = Nullhv; type = Nullch; - + if (SvGMAGICAL(sv)) mg_get(sv) ; if (SvROK(sv)) { sv = SvRV(sv); type = sv_reftype(sv,0); - if(SvOBJECT(sv)) + if (SvOBJECT(sv)) stash = SvSTASH(sv); } else { stash = gv_stashsv(sv, FALSE); } - + + name_stash = gv_stashpv(name, FALSE); + return (type && strEQ(type,name)) || - (stash && isa_lookup(stash, name, strlen(name), 0) == &PL_sv_yes) + (stash && isa_lookup(stash, name, name_stash, strlen(name), 0) + == &PL_sv_yes) ? TRUE : FALSE ; } -void XS_UNIVERSAL_isa(pTHXo_ CV *cv); -void XS_UNIVERSAL_can(pTHXo_ CV *cv); -void XS_UNIVERSAL_VERSION(pTHXo_ CV *cv); +#include "XSUB.h" + +void XS_UNIVERSAL_isa(pTHX_ CV *cv); +void XS_UNIVERSAL_can(pTHX_ CV *cv); +void XS_UNIVERSAL_VERSION(pTHX_ CV *cv); +XS(XS_utf8_valid); +XS(XS_utf8_encode); +XS(XS_utf8_decode); +XS(XS_utf8_upgrade); +XS(XS_utf8_downgrade); +XS(XS_utf8_unicode_to_native); +XS(XS_utf8_native_to_unicode); void Perl_boot_core_UNIVERSAL(pTHX) @@ -123,9 +176,15 @@ Perl_boot_core_UNIVERSAL(pTHX) newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file); newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file); newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file); + newXS("utf8::valid", XS_utf8_valid, file); + newXS("utf8::encode", XS_utf8_encode, file); + newXS("utf8::decode", XS_utf8_decode, file); + newXS("utf8::upgrade", XS_utf8_upgrade, file); + newXS("utf8::downgrade", XS_utf8_downgrade, file); + newXS("utf8::native_to_unicode", XS_utf8_native_to_unicode, file); + newXS("utf8::unicode_to_native", XS_utf8_unicode_to_native, file); } -#include "XSUB.h" XS(XS_UNIVERSAL_isa) { @@ -142,7 +201,7 @@ XS(XS_UNIVERSAL_isa) if (SvGMAGICAL(sv)) mg_get(sv); - if (!SvOK(sv) || !(SvROK(sv) || SvCUR(sv))) + if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) XSRETURN_UNDEF; name = (char *)SvPV(ST(1),n_a); @@ -168,15 +227,15 @@ XS(XS_UNIVERSAL_can) if (SvGMAGICAL(sv)) mg_get(sv); - if (!SvOK(sv) || !(SvROK(sv) || SvCUR(sv))) + if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) XSRETURN_UNDEF; name = (char *)SvPV(ST(1),n_a); rv = &PL_sv_undef; - if(SvROK(sv)) { + if (SvROK(sv)) { sv = (SV*)SvRV(sv); - if(SvOBJECT(sv)) + if (SvOBJECT(sv)) pkg = SvSTASH(sv); } else { @@ -229,10 +288,18 @@ XS(XS_UNIVERSAL_VERSION) STRLEN len; SV *req = ST(1); - if (undef) - Perl_croak(aTHX_ "%s does not define $%s::VERSION--version check failed", - HvNAME(pkg), HvNAME(pkg)); - + if (undef) { + if (pkg) + Perl_croak(aTHX_ + "%s does not define $%s::VERSION--version check failed", + HvNAME(pkg), HvNAME(pkg)); + else { + char *str = SvPVx(ST(0), len); + + Perl_croak(aTHX_ + "%s defines neither package nor VERSION--version check failed", str); + } + } if (!SvNIOK(sv) && SvPOK(sv)) { char *str = SvPVx(sv,len); while (len) { @@ -242,12 +309,12 @@ XS(XS_UNIVERSAL_VERSION) break; } if (len) { - if (SvNIOKp(req) && SvPOK(req)) { + if (SvNOK(req) && SvPOK(req)) { /* they said C and $Foo::VERSION * doesn't look like a float: do string compare */ if (sv_cmp(req,sv) == 1) { - Perl_croak(aTHX_ "%s version v%vd required--" - "this is only version v%vd", + Perl_croak(aTHX_ "%s v%"VDf" required--" + "this is only v%"VDf, HvNAME(pkg), req, sv); } goto finish; @@ -263,7 +330,7 @@ XS(XS_UNIVERSAL_VERSION) /* if we get here, we're looking for a numeric comparison, * so force the required version into a float, even if they * said C */ - if (SvNIOKp(req) && SvPOK(req)) { + if (SvNOK(req) && SvPOK(req)) { NV n = SvNV(req); req = sv_newmortal(); sv_setnv(req, n); @@ -271,7 +338,7 @@ XS(XS_UNIVERSAL_VERSION) if (SvNV(req) > SvNV(sv)) Perl_croak(aTHX_ "%s version %s required--this is only version %s", - HvNAME(pkg), SvPV(req,len), SvPV(sv,len)); + HvNAME(pkg), SvPV_nolen(req), SvPV_nolen(sv)); } finish: @@ -280,3 +347,114 @@ finish: XSRETURN(1); } +XS(XS_utf8_valid) +{ + dXSARGS; + if (items != 1) + Perl_croak(aTHX_ "Usage: utf8::valid(sv)"); + { + SV * sv = ST(0); + { + STRLEN len; + char *s = SvPV(sv,len); + if (!SvUTF8(sv) || is_utf8_string((U8*)s,len)) + XSRETURN_YES; + else + XSRETURN_NO; + } + } + XSRETURN_EMPTY; +} + +XS(XS_utf8_encode) +{ + dXSARGS; + if (items != 1) + Perl_croak(aTHX_ "Usage: utf8::encode(sv)"); + { + SV * sv = ST(0); + + sv_utf8_encode(sv); + } + XSRETURN_EMPTY; +} + +XS(XS_utf8_decode) +{ + dXSARGS; + if (items != 1) + Perl_croak(aTHX_ "Usage: utf8::decode(sv)"); + { + SV * sv = ST(0); + bool RETVAL; + + RETVAL = sv_utf8_decode(sv); + ST(0) = boolSV(RETVAL); + sv_2mortal(ST(0)); + } + XSRETURN(1); +} + +XS(XS_utf8_upgrade) +{ + dXSARGS; + if (items != 1) + Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)"); + { + SV * sv = ST(0); + STRLEN RETVAL; + dXSTARG; + + RETVAL = sv_utf8_upgrade(sv); + XSprePUSH; PUSHi((IV)RETVAL); + } + XSRETURN(1); +} + +XS(XS_utf8_downgrade) +{ + dXSARGS; + if (items < 1 || items > 2) + Perl_croak(aTHX_ "Usage: utf8::downgrade(sv, failok=0)"); + { + SV * sv = ST(0); + bool failok; + bool RETVAL; + + if (items < 2) + failok = 0; + else { + failok = (int)SvIV(ST(1)); + } + + RETVAL = sv_utf8_downgrade(sv, failok); + ST(0) = boolSV(RETVAL); + sv_2mortal(ST(0)); + } + XSRETURN(1); +} + +XS(XS_utf8_native_to_unicode) +{ + dXSARGS; + UV uv = SvUV(ST(0)); + + if (items > 1) + Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)"); + + ST(0) = sv_2mortal(newSViv(NATIVE_TO_UNI(uv))); + XSRETURN(1); +} + +XS(XS_utf8_unicode_to_native) +{ + dXSARGS; + UV uv = SvUV(ST(0)); + + if (items > 1) + Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)"); + + ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv))); + XSRETURN(1); +} +