X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=universal.c;h=868fe5514000c79ced23ce46d6121a0c1ad793f5;hb=9b1c7707319e7631584ef9f5d258edf5657d488c;hp=476b60d3c02b38b228f70a8289b7cb71662b9e8e;hpb=6f08146e2c3ab87e9f70e612981a0771a8acb8fb;p=p5sagit%2Fp5-mst-13.2.git diff --git a/universal.c b/universal.c index 476b60d..868fe55 100644 --- a/universal.c +++ b/universal.c @@ -1,46 +1,57 @@ #include "EXTERN.h" +#define PERL_IN_UNIVERSAL_C #include "perl.h" -#include "XSUB.h" /* * Contributed by Graham Barr * The main guts of traverse_isa was actually copied from gv_fetchmeth */ -static SV * -isa_lookup(stash, name, len, level) -HV *stash; -char *name; -int len; -int level; +STATIC SV * +S_isa_lookup(pTHX_ HV *stash, const char *name, int len, int level) { AV* av; GV* gv; GV** gvp; HV* hv = Nullhv; + SV* subgen = Nullsv; if (!stash) - return &sv_undef; + return &PL_sv_undef; - if(strEQ(HvNAME(stash), name)) - return &sv_yes; + if (strEQ(HvNAME(stash), name)) + return &PL_sv_yes; if (level > 100) - croak("Recursive inheritance detected"); + 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*)&sv_undef && (hv = GvHV(gv))) { - SV* sv; - SV** svp = (SV**)hv_fetch(hv, name, len, FALSE); - if (svp && (sv = *svp) != (SV*)&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*)&sv_undef && (av = GvAV(gv))) { - if(!hv) { + + if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { + if (!hv || !subgen) { gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, TRUE); gv = *gvp; @@ -48,104 +59,160 @@ 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); - I32 items = AvFILL(av) + 1; + /* 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 (dowarn) - warn("Can't locate package %s for @%s::ISA", + if (ckWARN(WARN_MISC)) + Perl_warner(aTHX_ WARN_SYNTAX, + "Can't locate package %s for @%s::ISA", SvPVX(sv), HvNAME(stash)); continue; } - if(&sv_yes == isa_lookup(basestash, name, len, level + 1)) { - (void)hv_store(hv,name,len,&sv_yes,0); - return &sv_yes; + if (&PL_sv_yes == isa_lookup(basestash, name, len, level + 1)) { + (void)hv_store(hv,name,len,&PL_sv_yes,0); + return &PL_sv_yes; } } - (void)hv_store(hv,name,len,&sv_no,0); + (void)hv_store(hv,name,len,&PL_sv_no,0); } } - return &sv_no; + return boolSV(strEQ(name, "UNIVERSAL")); } +/* +=for apidoc sv_derived_from + +Returns a boolean indicating whether the SV is derived from the specified +class. This is the function that implements C. It works +for class names as well as for objects. + +=cut +*/ + bool -sv_derived_from(sv, name) -SV * sv ; -char * name ; +Perl_sv_derived_from(pTHX_ SV *sv, const char *name) { - SV *rv; char *type; HV *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); } - + return (type && strEQ(type,name)) || - (stash && isa_lookup(stash, name, strlen(name), 0) == &sv_yes) + (stash && isa_lookup(stash, name, strlen(name), 0) == &PL_sv_yes) ? TRUE : FALSE ; - +} + +#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); +XS(XS_access_readonly); + +void +Perl_boot_core_UNIVERSAL(pTHX) +{ + char *file = __FILE__; + + 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); + newXSproto("access::readonly",XS_access_readonly, file, "\\[$%@];$"); } -static XS(XS_UNIVERSAL_isa) { dXSARGS; SV *sv; char *name; + STRLEN n_a; if (items != 2) - croak("Usage: UNIVERSAL::isa(reference, kind)"); + Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)"); sv = ST(0); - name = (char *)SvPV(ST(1),na); - ST(0) = (sv_derived_from(sv, name) ? &sv_yes : &sv_no) ; + if (SvGMAGICAL(sv)) + mg_get(sv); + if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) + XSRETURN_UNDEF; + + name = (char *)SvPV(ST(1),n_a); + + ST(0) = boolSV(sv_derived_from(sv, name)); XSRETURN(1); } -static XS(XS_UNIVERSAL_can) { dXSARGS; SV *sv; char *name; SV *rv; - GV *gv; - CV *cvp; HV *pkg = NULL; + STRLEN n_a; if (items != 2) - croak("Usage: UNIVERSAL::can(object-ref, method)"); + Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)"); sv = ST(0); - name = (char *)SvPV(ST(1),na); - rv = &sv_undef; - if(SvROK(sv)) { + if (SvGMAGICAL(sv)) + mg_get(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)) { sv = (SV*)SvRV(sv); - if(SvOBJECT(sv)) + if (SvOBJECT(sv)) pkg = SvSTASH(sv); } else { @@ -153,43 +220,15 @@ XS(XS_UNIVERSAL_can) } if (pkg) { - gv = gv_fetchmethod(pkg, name); - - if(gv && GvCV(gv)) { - /* If the sub is only a stub then we may have a gv to AUTOLOAD */ - GV **gvp = (GV**)hv_fetch(GvSTASH(gv), name, strlen(name), TRUE); - if(gvp && (cvp = GvCV(*gvp))) { - rv = sv_newmortal(); - sv_setsv(rv, newRV((SV*)cvp)); - } - } + GV *gv = gv_fetchmethod_autoload(pkg, name, FALSE); + if (gv && isGV(gv)) + rv = sv_2mortal(newRV((SV*)GvCV(gv))); } ST(0) = rv; XSRETURN(1); } -static -XS(XS_UNIVERSAL_is_instance) -{ - dXSARGS; - ST(0) = SvROK(ST(0)) ? &sv_yes : &sv_no; - XSRETURN(1); -} - -static -XS(XS_UNIVERSAL_class) -{ - dXSARGS; - if(SvROK(ST(0)) && SvOBJECT(SvRV(ST(0)))) { - SV *sv = sv_newmortal(); - sv_setpv(sv, HvNAME(SvSTASH(SvRV(ST(0))))); - ST(0) = sv; - } - XSRETURN(1); -} - -static XS(XS_UNIVERSAL_VERSION) { dXSARGS; @@ -199,10 +238,10 @@ XS(XS_UNIVERSAL_VERSION) SV *sv; char *undef; - if(SvROK(ST(0))) { + if (SvROK(ST(0))) { sv = (SV*)SvRV(ST(0)); - if(!SvOBJECT(sv)) - croak("Cannot find version of an unblessed reference"); + if (!SvOBJECT(sv)) + Perl_croak(aTHX_ "Cannot find version of an unblessed reference"); pkg = SvSTASH(sv); } else { @@ -211,34 +250,199 @@ XS(XS_UNIVERSAL_VERSION) gvp = pkg ? (GV**)hv_fetch(pkg,"VERSION",7,FALSE) : Null(GV**); - if (gvp && (gv = *gvp) != (GV*)&sv_undef && (sv = GvSV(gv))) { + if (gvp && isGV(gv = *gvp) && SvOK(sv = GvSV(gv))) { SV *nsv = sv_newmortal(); sv_setsv(nsv, sv); sv = nsv; undef = Nullch; } else { - sv = (SV*)&sv_undef; + sv = (SV*)&PL_sv_undef; undef = "(undef)"; } - if(items > 1 && (undef || SvNV(ST(1)) > SvNV(sv))) - croak("%s version %s required--this is only version %s", - HvNAME(pkg),SvPV(ST(1),na),undef ? undef : SvPV(sv,na)); + if (items > 1) { + 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 (!SvNIOK(sv) && SvPOK(sv)) { + char *str = SvPVx(sv,len); + while (len) { + --len; + /* XXX could DWIM "1.2.3" here */ + if (!isDIGIT(str[len]) && str[len] != '.' && str[len] != '_') + break; + } + if (len) { + 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 v%"VDf" required--" + "this is only v%"VDf, + HvNAME(pkg), req, sv); + } + goto finish; + } + /* they said C and $Foo::VERSION + * doesn't look like a float: force numeric compare */ + (void)SvUPGRADE(sv, SVt_PVNV); + SvNVX(sv) = str_to_version(sv); + SvPOK_off(sv); + SvNOK_on(sv); + } + } + /* 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 (SvNOK(req) && SvPOK(req)) { + NV n = SvNV(req); + req = sv_newmortal(); + sv_setnv(req, n); + } + + if (SvNV(req) > SvNV(sv)) + Perl_croak(aTHX_ "%s version %s required--this is only version %s", + HvNAME(pkg), SvPV_nolen(req), SvPV_nolen(sv)); + } +finish: ST(0) = sv; XSRETURN(1); } -void -boot_core_UNIVERSAL() +XS(XS_utf8_valid) { - char *file = __FILE__; + 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; +} - newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file); - newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file); - newXS("UNIVERSAL::class", XS_UNIVERSAL_class, file); - newXS("UNIVERSAL::is_instance", XS_UNIVERSAL_is_instance, file); - newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file); +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); +} + +XS(XS_access_readonly) +{ + dXSARGS; + SV *sv = SvRV(ST(0)); + IV old = SvREADONLY(sv); + if (items == 2) { + if (SvTRUE(ST(1))) { + SvREADONLY_on(sv); + } + else { + SvREADONLY_off(sv); + } + } + if (old) + XSRETURN_YES; + else + XSRETURN_NO; +} +