X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=universal.c;h=486b366f4aec947005874bf10144a2860b605e53;hb=b4bc5691c8dfad19b52d103e3b12af9342fcea38;hp=0899b1a6019993ff4156300bd716783a9d233201;hpb=22d4bb9ccb8701e68f9243547d7e3a3c55f70908;p=p5sagit%2Fp5-mst-13.2.git diff --git a/universal.c b/universal.c index 0899b1a..486b366 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" @@ -8,7 +23,8 @@ */ 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; @@ -16,8 +32,10 @@ S_isa_lookup(pTHX_ HV *stash, const char *name, int len, int level) 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)) return &PL_sv_yes; @@ -31,7 +49,7 @@ S_isa_lookup(pTHX_ HV *stash, const char *name, int len, int level) 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) { @@ -74,14 +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; } @@ -94,6 +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 @@ -108,6 +128,7 @@ Perl_sv_derived_from(pTHX_ SV *sv, const char *name) { char *type; HV *stash; + HV *name_stash; stash = Nullhv; type = Nullch; @@ -125,15 +146,36 @@ 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" + +void XS_UNIVERSAL_isa(pTHX_ CV *cv); +void XS_UNIVERSAL_can(pTHX_ CV *cv); +void XS_UNIVERSAL_VERSION(pTHX_ CV *cv); +XS(XS_version_new); +XS(XS_version_stringify); +XS(XS_version_numify); +XS(XS_version_vcmp); +XS(XS_version_boolean); +XS(XS_version_noop); +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); void Perl_boot_core_UNIVERSAL(pTHX) @@ -143,9 +185,40 @@ 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); + { + /* create the package stash for version objects */ + HV *hv = get_hv("version::OVERLOAD",TRUE); + SV *sv = *hv_fetch(hv,"register",8,1); + sv_inc(sv); + SvSETMAGIC(sv); + /* Make it findable via fetchmethod */ + newXS("version::()", NULL, 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::(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("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, "\\%"); } -#include "XSUB.h" XS(XS_UNIVERSAL_isa) { @@ -249,10 +322,18 @@ 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) { @@ -291,7 +372,7 @@ 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: @@ -300,3 +381,372 @@ finish: XSRETURN(1); } +XS(XS_version_new) +{ + dXSARGS; + if (items != 2) + Perl_croak(aTHX_ "Usage: version::new(class, version)"); + SP -= items; + { +/* char * class = (char *)SvPV_nolen(ST(0)); */ + SV * version = ST(1); + +{ + PUSHs(new_version(version)); +} + + PUTBACK; + return; + } +} + +XS(XS_version_stringify) +{ + dXSARGS; + if (items < 1) + Perl_croak(aTHX_ "Usage: version::stringify(lobj, ...)"); + SP -= items; + { + SV * lobj; + + if (sv_derived_from(ST(0), "version")) { + SV *tmp = SvRV(ST(0)); + lobj = tmp; + } + else + croak("lobj is not of type version"); + +{ + SV *vs = NEWSV(92,5); + if ( lobj == SvRV(PL_patchlevel) ) + sv_catsv(vs,lobj); + else + vstringify(vs,lobj); + PUSHs(vs); +} + + PUTBACK; + return; + } +} + +XS(XS_version_numify) +{ + dXSARGS; + if (items < 1) + Perl_croak(aTHX_ "Usage: version::numify(lobj, ...)"); + SP -= items; + { + SV * lobj; + + if (sv_derived_from(ST(0), "version")) { + SV *tmp = SvRV(ST(0)); + lobj = tmp; + } + else + croak("lobj is not of type version"); + +{ + SV *vs = NEWSV(92,5); + vnumify(vs,lobj); + PUSHs(vs); +} + + PUTBACK; + return; + } +} + +XS(XS_version_vcmp) +{ + dXSARGS; + if (items < 1) + Perl_croak(aTHX_ "Usage: version::vcmp(lobj, ...)"); + SP -= items; + { + SV * lobj; + + if (sv_derived_from(ST(0), "version")) { + SV *tmp = SvRV(ST(0)); + lobj = tmp; + } + else + croak("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(sv_cmp(rvs,lobj)); + } + else + { + rs = newSViv(sv_cmp(lobj,rvs)); + } + + PUSHs(rs); +} + + PUTBACK; + return; + } +} + +XS(XS_version_boolean) +{ + dXSARGS; + if (items < 1) + Perl_croak(aTHX_ "Usage: version::boolean(lobj, ...)"); + SP -= items; + { + SV * lobj; + + if (sv_derived_from(ST(0), "version")) { + SV *tmp = SvRV(ST(0)); + lobj = tmp; + } + else + croak("lobj is not of type version"); + +{ + SV *rs; + rs = newSViv(sv_cmp(lobj,Nullsv)); + PUSHs(rs); +} + + PUTBACK; + return; + } +} + +XS(XS_version_noop) +{ + dXSARGS; + if (items < 1) + Perl_croak(aTHX_ "Usage: version::noop(lobj, ...)"); + { + SV * lobj; + + if (sv_derived_from(ST(0), "version")) { + SV *tmp = SvRV(ST(0)); + lobj = tmp; + } + else + croak("lobj is not of type version"); + +{ + croak("operation not supported with version object"); +} + + } + XSRETURN_EMPTY; +} + +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); +} + +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. */ +} + +/* Maybe this should return the number of placeholders found in scalar context, + and a list of them in list context. */ +XS(XS_Internals_hv_clear_placehold) +{ + dXSARGS; + HV *hv = (HV *) SvRV(ST(0)); + + /* I don't care how many parameters were passed in, but I want to avoid + the unused variable warning. */ + + items = (I32)HvPLACEHOLDERS(hv); + + if (items) { + HE *entry; + I32 riter = HvRITER(hv); + HE *eiter = HvEITER(hv); + hv_iterinit(hv); + /* This may look suboptimal with the items *after* the iternext, but + it's quite deliberate. We only get here with items==0 if we've + just deleted the last placeholder in the hash. If we've just done + that then it means that the hash is in lazy delete mode, and the + HE is now only referenced in our iterator. If we just quit the loop + and discarded our iterator then the HE leaks. So we do the && the + other way to ensure iternext is called just one more time, which + has the side effect of triggering the lazy delete. */ + while ((entry = hv_iternext_flags(hv, HV_ITERNEXT_WANTPLACEHOLDERS)) + && items) { + SV *val = hv_iterval(hv, entry); + + if (val == &PL_sv_undef) { + + /* It seems that I have to go back in the front of the hash + API to delete a hash, even though I have a HE structure + pointing to the very entry I want to delete, and could hold + onto the previous HE that points to it. And it's easier to + go in with SVs as I can then specify the precomputed hash, + and don't have fun and games with utf8 keys. */ + SV *key = hv_iterkeysv(entry); + + hv_delete_ent (hv, key, G_DISCARD, HeHASH(entry)); + items--; + } + } + HvRITER(hv) = riter; + HvEITER(hv) = eiter; + } + + XSRETURN(0); +}