X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=universal.c;h=1564b59eaab8ac27ab6b75ed988db6dd13ffe492;hb=9137345a080bfc646c2f9440cdb7bd90b8b37428;hp=6c555a1347d3d53fed32895f507d13c307f5c5c2;hpb=92d29cee5ff815b05b81b877528e4c77e73881c9;p=p5sagit%2Fp5-mst-13.2.git diff --git a/universal.c b/universal.c index 6c555a1..1564b59 100644 --- a/universal.c +++ b/universal.c @@ -1,48 +1,81 @@ +/* universal.c + * + * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, + * 2005, by Larry Wall and others + * + * 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 + */ + +/* This file contains the code that implements the functions in Perl's + * UNIVERSAL package, such as UNIVERSAL->can(). + */ + #include "EXTERN.h" #define PERL_IN_UNIVERSAL_C #include "perl.h" +#ifdef USE_PERLIO +#include "perliol.h" /* For the PERLIO_F_XXX */ +#endif + /* * Contributed by Graham Barr * The main guts of traverse_isa was actually copied from gv_fetchmeth */ 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; + const char *hvname; + + /* 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 (!stash) - return &PL_sv_undef; + hvname = HvNAME_get(stash); + + if (strEQ(hvname, name)) + return &PL_sv_yes; - if (strEQ(HvNAME(stash), name)) + if (strEQ(name, "UNIVERSAL")) return &PL_sv_yes; if (level > 100) Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", - HvNAME(stash)); + hvname); gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, FALSE); if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (subgen = GvSV(gv)) && (hv = GvHV(gv))) { - if (SvIV(subgen) == PL_sub_generation) { + if (SvIV(subgen) == (IV)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)) ); + name, hvname) ); return sv; } } else { DEBUG_o( Perl_deb(aTHX_ "ISA Cache in package %s is stale\n", - HvNAME(stash)) ); + hvname) ); hv_clear(hv); sv_setiv(subgen, PL_sub_generation); } @@ -74,14 +107,14 @@ 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, - "Can't locate package %s for @%s::ISA", - SvPVX(sv), HvNAME(stash)); + Perl_warner(aTHX_ packWARN(WARN_SYNTAX), + "Can't locate package %"SVf" for @%s::ISA", + sv, hvname); 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; } @@ -89,11 +122,12 @@ S_isa_lookup(pTHX_ HV *stash, const char *name, int len, int level) (void)hv_store(hv,name,len,&PL_sv_no,0); } } - - return boolSV(strEQ(name, "UNIVERSAL")); + return &PL_sv_no; } /* +=head1 SV Manipulation Functions + =for apidoc sv_derived_from Returns a boolean indicating whether the SV is derived from the specified @@ -106,11 +140,9 @@ for class names as well as for objects. bool Perl_sv_derived_from(pTHX_ SV *sv, const char *name) { - char *type; - HV *stash; - - stash = Nullhv; - type = Nullch; + const char *type = Nullch; + HV *stash = Nullhv; + HV *name_stash; if (SvGMAGICAL(sv)) mg_get(sv) ; @@ -125,34 +157,105 @@ Perl_sv_derived_from(pTHX_ SV *sv, const char *name) 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" + +PERL_XS_EXPORT_C void XS_UNIVERSAL_isa(pTHX_ CV *cv); +PERL_XS_EXPORT_C void XS_UNIVERSAL_can(pTHX_ CV *cv); +PERL_XS_EXPORT_C void XS_UNIVERSAL_VERSION(pTHX_ CV *cv); +XS(XS_version_new); +XS(XS_version_stringify); +XS(XS_version_numify); +XS(XS_version_normal); +XS(XS_version_vcmp); +XS(XS_version_boolean); +#ifdef HASATTRIBUTE_NORETURN +XS(XS_version_noop) __attribute__noreturn__; +#else +XS(XS_version_noop); +#endif +XS(XS_version_is_alpha); +XS(XS_version_qv); +XS(XS_utf8_is_utf8); +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_Internals_SvREADONLY); +XS(XS_Internals_SvREFCNT); +XS(XS_Internals_hv_clear_placehold); +XS(XS_PerlIO_get_layers); +XS(XS_Regexp_DESTROY); +XS(XS_Internals_hash_seed); +XS(XS_Internals_rehash_seed); +XS(XS_Internals_HvREHASH); void Perl_boot_core_UNIVERSAL(pTHX) { - char *file = __FILE__; + const char file[] = __FILE__; newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file); newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file); newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file); + { + /* register the overloading (type 'A') magic */ + PL_amagic_generation++; + /* Make it findable via fetchmethod */ + newXS("version::()", XS_version_noop, file); + newXS("version::new", XS_version_new, file); + newXS("version::(\"\"", XS_version_stringify, file); + newXS("version::stringify", XS_version_stringify, file); + newXS("version::(0+", XS_version_numify, file); + newXS("version::numify", XS_version_numify, file); + newXS("version::normal", XS_version_normal, file); + newXS("version::(cmp", XS_version_vcmp, file); + newXS("version::(<=>", XS_version_vcmp, file); + newXS("version::vcmp", XS_version_vcmp, file); + newXS("version::(bool", XS_version_boolean, file); + newXS("version::boolean", XS_version_boolean, file); + newXS("version::(nomethod", XS_version_noop, file); + newXS("version::noop", XS_version_noop, file); + newXS("version::is_alpha", XS_version_is_alpha, file); + newXS("version::qv", XS_version_qv, file); + } + newXS("utf8::is_utf8", XS_utf8_is_utf8, 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("Internals::SvREADONLY",XS_Internals_SvREADONLY, file, "\\[$%@];$"); + newXSproto("Internals::SvREFCNT",XS_Internals_SvREFCNT, file, "\\[$%@];$"); + newXSproto("Internals::hv_clear_placeholders", + XS_Internals_hv_clear_placehold, file, "\\%"); + newXSproto("PerlIO::get_layers", + XS_PerlIO_get_layers, file, "*;@"); + newXS("Regexp::DESTROY", XS_Regexp_DESTROY, file); + newXSproto("Internals::hash_seed",XS_Internals_hash_seed, file, ""); + newXSproto("Internals::rehash_seed",XS_Internals_rehash_seed, file, ""); + newXSproto("Internals::HvREHASH", XS_Internals_HvREHASH, file, "\\%"); } -#include "XSUB.h" XS(XS_UNIVERSAL_isa) { dXSARGS; SV *sv; - char *name; - STRLEN n_a; + const char *name; if (items != 2) Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)"); @@ -162,10 +265,11 @@ XS(XS_UNIVERSAL_isa) if (SvGMAGICAL(sv)) mg_get(sv); - if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) + if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) + || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) XSRETURN_UNDEF; - name = (char *)SvPV(ST(1),n_a); + name = SvPV_nolen_const(ST(1)); ST(0) = boolSV(sv_derived_from(sv, name)); XSRETURN(1); @@ -175,10 +279,9 @@ XS(XS_UNIVERSAL_can) { dXSARGS; SV *sv; - char *name; + const char *name; SV *rv; HV *pkg = NULL; - STRLEN n_a; if (items != 2) Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)"); @@ -188,10 +291,11 @@ XS(XS_UNIVERSAL_can) if (SvGMAGICAL(sv)) mg_get(sv); - if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) + if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) + || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) XSRETURN_UNDEF; - name = (char *)SvPV(ST(1),n_a); + name = SvPV_nolen_const(ST(1)); rv = &PL_sv_undef; if (SvROK(sv)) { @@ -220,7 +324,7 @@ XS(XS_UNIVERSAL_VERSION) GV **gvp; GV *gv; SV *sv; - char *undef; + const char *undef; if (SvROK(ST(0))) { sv = (SV*)SvRV(ST(0)); @@ -238,6 +342,8 @@ XS(XS_UNIVERSAL_VERSION) SV *nsv = sv_newmortal(); sv_setsv(nsv, sv); sv = nsv; + if ( !sv_derived_from(sv, "version")) + upg_version(sv); undef = Nullch; } else { @@ -246,57 +352,639 @@ XS(XS_UNIVERSAL_VERSION) } 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 (undef) { + if (pkg) { + const char *name = HvNAME_get(pkg); + Perl_croak(aTHX_ + "%s does not define $%s::VERSION--version check failed", + name, name); + } else { + Perl_croak(aTHX_ + "%s defines neither package nor VERSION--version check failed", + SvPVx_nolen_const(ST(0)) ); + } + } + + if ( !sv_derived_from(req, "version")) { + /* req may very well be R/O, so create a new object */ + SV *nsv = sv_newmortal(); + sv_setsv(nsv, req); + req = nsv; + upg_version(req); + } + + if ( vcmp( req, sv ) > 0 ) + Perl_croak(aTHX_ "%s version %"SVf" (%"SVf") required--" + "this is only version %"SVf" (%"SVf")", HvNAME_get(pkg), + vnumify(req),vnormal(req),vnumify(sv),vnormal(sv)); + } + + if ( SvOK(sv) && sv_derived_from(sv, "version") ) { + ST(0) = vnumify(sv); + } else { + ST(0) = sv; + } + + XSRETURN(1); +} + +XS(XS_version_new) +{ + dXSARGS; + if (items > 3) + Perl_croak(aTHX_ "Usage: version::new(class, version)"); + SP -= items; + { + SV *vs = ST(1); + SV *rv; + const char *classname; + + /* get the class if called as an object method */ + if ( sv_isobject(ST(0)) ) { + classname = HvNAME(SvSTASH(SvRV(ST(0)))); + } + else { + classname = (char *)SvPV_nolen(ST(0)); + } + + if ( items == 1 ) { + /* no parameter provided */ + if ( sv_isobject(ST(0)) ) { + /* copy existing object */ + vs = ST(0); } - 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%vd required--" - "this is only v%vd", - 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); + else { + /* create empty object */ + vs = sv_newmortal(); + sv_setpv(vs,""); + } + } + else if ( items == 3 ) { + vs = sv_newmortal(); + Perl_sv_setpvf(aTHX_ vs,"v%s",SvPV_nolen_const(ST(2))); + } + + rv = new_version(vs); + if ( strcmp(classname,"version") != 0 ) /* inherited new() */ + sv_bless(rv, gv_stashpv(classname,TRUE)); + + PUSHs(sv_2mortal(rv)); + PUTBACK; + return; + } +} + +XS(XS_version_stringify) +{ + dXSARGS; + if (items < 1) + Perl_croak(aTHX_ "Usage: version::stringify(lobj, ...)"); + SP -= items; + { + SV * lobj = Nullsv; + + if (sv_derived_from(ST(0), "version")) { + lobj = SvRV(ST(0)); + } + else + Perl_croak(aTHX_ "lobj is not of type version"); + + PUSHs(sv_2mortal(vstringify(lobj))); + + PUTBACK; + return; + } +} + +XS(XS_version_numify) +{ + dXSARGS; + if (items < 1) + Perl_croak(aTHX_ "Usage: version::numify(lobj, ...)"); + SP -= items; + { + SV * lobj = Nullsv; + + if (sv_derived_from(ST(0), "version")) { + lobj = SvRV(ST(0)); + } + else + Perl_croak(aTHX_ "lobj is not of type version"); + + PUSHs(sv_2mortal(vnumify(lobj))); + + PUTBACK; + return; + } +} + +XS(XS_version_normal) +{ + dXSARGS; + if (items < 1) + Perl_croak(aTHX_ "Usage: version::normal(lobj, ...)"); + SP -= items; + { + SV * lobj = Nullsv; + + if (sv_derived_from(ST(0), "version")) { + lobj = SvRV(ST(0)); + } + else + Perl_croak(aTHX_ "lobj is not of type version"); + + PUSHs(sv_2mortal(vnormal(lobj))); + + PUTBACK; + return; + } +} + +XS(XS_version_vcmp) +{ + dXSARGS; + if (items < 1) + Perl_croak(aTHX_ "Usage: version::vcmp(lobj, ...)"); + SP -= items; + { + SV * lobj = Nullsv; + + if (sv_derived_from(ST(0), "version")) { + lobj = SvRV(ST(0)); + } + else + Perl_croak(aTHX_ "lobj is not of type version"); + + { + SV *rs; + SV *rvs; + SV * robj = ST(1); + IV swap = (IV)SvIV(ST(2)); + + if ( ! sv_derived_from(robj, "version") ) + { + robj = new_version(robj); + } + rvs = SvRV(robj); + + if ( swap ) + { + rs = newSViv(vcmp(rvs,lobj)); + } + else + { + rs = newSViv(vcmp(lobj,rvs)); + } + + PUSHs(sv_2mortal(rs)); + } + + PUTBACK; + return; + } +} + +XS(XS_version_boolean) +{ + dXSARGS; + if (items < 1) + Perl_croak(aTHX_ "Usage: version::boolean(lobj, ...)"); + SP -= items; + { + SV * lobj = Nullsv; + + if (sv_derived_from(ST(0), "version")) { + lobj = SvRV(ST(0)); + } + else + Perl_croak(aTHX_ "lobj is not of type version"); + + { + SV *rs; + rs = newSViv( vcmp(lobj,new_version(newSVpvn("0",1))) ); + PUSHs(sv_2mortal(rs)); + } + + PUTBACK; + return; + } +} + +XS(XS_version_noop) +{ + dXSARGS; + if (items < 1) + Perl_croak(aTHX_ "Usage: version::noop(lobj, ...)"); + if (sv_derived_from(ST(0), "version")) + Perl_croak(aTHX_ "operation not supported with version object"); + else + Perl_croak(aTHX_ "lobj is not of type version"); +#ifndef HASATTRIBUTE_NORETURN + XSRETURN_EMPTY; +#endif +} + +XS(XS_version_is_alpha) +{ + dXSARGS; + if (items != 1) + Perl_croak(aTHX_ "Usage: version::is_alpha(lobj)"); + SP -= items; + { + SV * lobj = Nullsv; + + if (sv_derived_from(ST(0), "version")) + lobj = ST(0); + else + Perl_croak(aTHX_ "lobj is not of type version"); +{ + if ( hv_exists((HV*)SvRV(lobj), "alpha", 5 ) ) + XSRETURN_YES; + else + XSRETURN_NO; +} + PUTBACK; + return; + } +} + +XS(XS_version_qv) +{ + dXSARGS; + if (items != 1) + Perl_croak(aTHX_ "Usage: version::qv(ver)"); + SP -= items; + { + SV * ver = ST(0); + if ( !SvVOK(ver) ) /* only need to do with if not already v-string */ + { + SV *vs = sv_newmortal(); + char *version; + if ( SvNOK(ver) ) /* may get too much accuracy */ + { + char tbuf[64]; + sprintf(tbuf,"%.9"NVgf, SvNVX(ver)); + version = savepv(tbuf); + } + else + { + version = savesvpv(ver); } + (void)scan_version(version,vs,TRUE); + Safefree(version); + + PUSHs(vs); } - /* 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); + else + { + PUSHs(sv_2mortal(new_version(ver))); } - 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)); + PUTBACK; + return; } +} -finish: - ST(0) = sv; +XS(XS_utf8_is_utf8) +{ + dXSARGS; + if (items != 1) + Perl_croak(aTHX_ "Usage: utf8::is_utf8(sv)"); + { + const SV *sv = ST(0); + { + if (SvUTF8(sv)) + XSRETURN_YES; + else + XSRETURN_NO; + } + } + XSRETURN_EMPTY; +} +XS(XS_utf8_valid) +{ + dXSARGS; + if (items != 1) + Perl_croak(aTHX_ "Usage: utf8::valid(sv)"); + { + SV * sv = ST(0); + { + STRLEN len; + const char *s = SvPV_const(sv,len); + if (!SvUTF8(sv) || is_utf8_string((const 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); + const bool 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); + const bool failok = (items < 2) ? 0 : (int)SvIV(ST(1)); + const bool RETVAL = sv_utf8_downgrade(sv, failok); + + ST(0) = boolSV(RETVAL); + sv_2mortal(ST(0)); + } XSRETURN(1); } +XS(XS_utf8_native_to_unicode) +{ + dXSARGS; + const 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; + const 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_Internals_SvREADONLY) /* This is dangerous stuff. */ +{ + dXSARGS; + SV *sv = SvRV(ST(0)); + + if (items == 1) { + if (SvREADONLY(sv)) + XSRETURN_YES; + else + XSRETURN_NO; + } + else if (items == 2) { + if (SvTRUE(ST(1))) { + SvREADONLY_on(sv); + XSRETURN_YES; + } + else { + /* I hope you really know what you are doing. */ + SvREADONLY_off(sv); + XSRETURN_NO; + } + } + XSRETURN_UNDEF; /* Can't happen. */ +} + +XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */ +{ + dXSARGS; + SV *sv = SvRV(ST(0)); + + if (items == 1) + XSRETURN_IV(SvREFCNT(sv) - 1); /* Minus the ref created for us. */ + else if (items == 2) { + /* I hope you really know what you are doing. */ + SvREFCNT(sv) = SvIV(ST(1)); + XSRETURN_IV(SvREFCNT(sv)); + } + XSRETURN_UNDEF; /* Can't happen. */ +} + +XS(XS_Internals_hv_clear_placehold) +{ + dXSARGS; + HV *hv = (HV *) SvRV(ST(0)); + + if (items != 1) + Perl_croak(aTHX_ "Usage: UNIVERSAL::hv_clear_placeholders(hv)"); + hv_clear_placeholders(hv); + XSRETURN(0); +} + +XS(XS_Regexp_DESTROY) +{ +} + +XS(XS_PerlIO_get_layers) +{ + dXSARGS; + if (items < 1 || items % 2 == 0) + Perl_croak(aTHX_ "Usage: PerlIO_get_layers(filehandle[,args])"); +#ifdef USE_PERLIO + { + SV * sv; + GV * gv; + IO * io; + bool input = TRUE; + bool details = FALSE; + + if (items > 1) { + SV **svp; + + for (svp = MARK + 2; svp <= SP; svp += 2) { + SV **varp = svp; + SV **valp = svp + 1; + STRLEN klen; + const char *key = SvPV_const(*varp, klen); + + switch (*key) { + case 'i': + if (klen == 5 && memEQ(key, "input", 5)) { + input = SvTRUE(*valp); + break; + } + goto fail; + case 'o': + if (klen == 6 && memEQ(key, "output", 6)) { + input = !SvTRUE(*valp); + break; + } + goto fail; + case 'd': + if (klen == 7 && memEQ(key, "details", 7)) { + details = SvTRUE(*valp); + break; + } + goto fail; + default: + fail: + Perl_croak(aTHX_ + "get_layers: unknown argument '%s'", + key); + } + } + + SP -= (items - 1); + } + + sv = POPs; + gv = (GV*)sv; + + if (!isGV(sv)) { + if (SvROK(sv) && isGV(SvRV(sv))) + gv = (GV*)SvRV(sv); + else + gv = gv_fetchsv(sv, FALSE, SVt_PVIO); + } + + if (gv && (io = GvIO(gv))) { + dTARGET; + AV* av = PerlIO_get_layers(aTHX_ input ? + IoIFP(io) : IoOFP(io)); + I32 i; + I32 last = av_len(av); + I32 nitem = 0; + + for (i = last; i >= 0; i -= 3) { + SV **namsvp; + SV **argsvp; + SV **flgsvp; + bool namok, argok, flgok; + + namsvp = av_fetch(av, i - 2, FALSE); + argsvp = av_fetch(av, i - 1, FALSE); + flgsvp = av_fetch(av, i, FALSE); + + namok = namsvp && *namsvp && SvPOK(*namsvp); + argok = argsvp && *argsvp && SvPOK(*argsvp); + flgok = flgsvp && *flgsvp && SvIOK(*flgsvp); + + if (details) { + XPUSHs(namok ? + newSVpv(SvPVX_const(*namsvp), 0) : &PL_sv_undef); + XPUSHs(argok ? + newSVpv(SvPVX_const(*argsvp), 0) : &PL_sv_undef); + if (flgok) + XPUSHi(SvIVX(*flgsvp)); + else + XPUSHs(&PL_sv_undef); + nitem += 3; + } + else { + if (namok && argok) + XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf"(%"SVf")", + *namsvp, *argsvp)); + else if (namok) + XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf, *namsvp)); + else + XPUSHs(&PL_sv_undef); + nitem++; + if (flgok) { + IV flags = SvIVX(*flgsvp); + + if (flags & PERLIO_F_UTF8) { + XPUSHs(newSVpvn("utf8", 4)); + nitem++; + } + } + } + } + + SvREFCNT_dec(av); + + XSRETURN(nitem); + } + } +#endif + + XSRETURN(0); +} + +XS(XS_Internals_hash_seed) +{ + /* Using dXSARGS would also have dITEM and dSP, + * which define 2 unused local variables. */ + dAXMARK; + (void)mark; + XSRETURN_UV(PERL_HASH_SEED); +} + +XS(XS_Internals_rehash_seed) +{ + /* Using dXSARGS would also have dITEM and dSP, + * which define 2 unused local variables. */ + dAXMARK; + (void)mark; + XSRETURN_UV(PL_rehash_seed); +} + +XS(XS_Internals_HvREHASH) /* Subject to change */ +{ + dXSARGS; + if (SvROK(ST(0))) { + const HV *hv = (HV *) SvRV(ST(0)); + if (items == 1 && SvTYPE(hv) == SVt_PVHV) { + if (HvREHASH(hv)) + XSRETURN_YES; + else + XSRETURN_NO; + } + } + Perl_croak(aTHX_ "Internals::HvREHASH $hashref"); +} + +/* + * Local variables: + * c-indentation-style: bsd + * c-basic-offset: 4 + * indent-tabs-mode: t + * End: + * + * ex: set ts=8 sts=4 sw=4 noet: + */