3 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 * 2005, 2006, 2007, 2008 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * '"The roots of those mountains must be roots indeed; there must be
13 * great secrets buried there which have not been discovered since the
14 * beginning."' --Gandalf, relating Gollum's history
16 * [p.54 of _The Lord of the Rings_, I/ii: "The Shadow of the Past"]
19 /* This file contains the code that implements the functions in Perl's
20 * UNIVERSAL package, such as UNIVERSAL->can().
22 * It is also used to store XS functions that need to be present in
23 * miniperl for a lack of a better place to put them. It might be
24 * clever to move them to seperate XS files which would then be pulled
25 * in by some to-be-written build process.
29 #define PERL_IN_UNIVERSAL_C
33 #include "perliol.h" /* For the PERLIO_F_XXX */
37 S_get_isa_hash(pTHX_ HV *const stash)
40 struct mro_meta *const meta = HvMROMETA(stash);
42 PERL_ARGS_ASSERT_GET_ISA_HASH;
45 AV *const isa = mro_get_linear_isa(stash);
47 HV *const isa_hash = newHV();
48 /* Linearisation didn't build it for us, so do it here. */
49 SV *const *svp = AvARRAY(isa);
50 SV *const *const svp_end = svp + AvFILLp(isa) + 1;
51 const HEK *const canon_name = HvNAME_HEK(stash);
53 while (svp < svp_end) {
54 (void) hv_store_ent(isa_hash, *svp++, &PL_sv_undef, 0);
57 (void) hv_common(isa_hash, NULL, HEK_KEY(canon_name),
58 HEK_LEN(canon_name), HEK_FLAGS(canon_name),
59 HV_FETCH_ISSTORE, &PL_sv_undef,
60 HEK_HASH(canon_name));
61 (void) hv_store(isa_hash, "UNIVERSAL", 9, &PL_sv_undef, 0);
63 SvREADONLY_on(isa_hash);
72 * Contributed by Graham Barr <Graham.Barr@tiuk.ti.com>
73 * The main guts of traverse_isa was actually copied from gv_fetchmeth
77 S_isa_lookup(pTHX_ HV *stash, const char * const name)
80 const struct mro_meta *const meta = HvMROMETA(stash);
81 HV *const isa = meta->isa ? meta->isa : S_get_isa_hash(aTHX_ stash);
82 STRLEN len = strlen(name);
85 PERL_ARGS_ASSERT_ISA_LOOKUP;
87 if (hv_common(isa, NULL, name, len, 0 /* No "UTF-8" flag possible with only
89 HV_FETCH_ISEXISTS, NULL, 0)) {
90 /* Direct name lookup worked. */
94 /* A stash/class can go by many names (ie. User == main::User), so
95 we use the name in the stash itself, which is canonical. */
96 our_stash = gv_stashpvn(name, len, 0);
99 HEK *const canon_name = HvNAME_HEK(our_stash);
101 if (hv_common(isa, NULL, HEK_KEY(canon_name), HEK_LEN(canon_name),
102 HEK_FLAGS(canon_name),
103 HV_FETCH_ISEXISTS, NULL, HEK_HASH(canon_name))) {
112 =head1 SV Manipulation Functions
114 =for apidoc sv_derived_from
116 Returns a boolean indicating whether the SV is derived from the specified class
117 I<at the C level>. To check derivation at the Perl level, call C<isa()> as a
124 Perl_sv_derived_from(pTHX_ SV *sv, const char *const name)
129 PERL_ARGS_ASSERT_SV_DERIVED_FROM;
136 type = sv_reftype(sv,0);
137 if (type && strEQ(type,name))
139 stash = SvOBJECT(sv) ? SvSTASH(sv) : NULL;
142 stash = gv_stashsv(sv, 0);
145 return stash ? isa_lookup(stash, name) : FALSE;
151 Returns a boolean indicating whether the SV performs a specific, named role.
152 The SV can be a Perl object or the name of a Perl class.
160 Perl_sv_does(pTHX_ SV *sv, const char *const name)
162 const char *classname;
167 PERL_ARGS_ASSERT_SV_DOES;
174 if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))
175 || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv))))
178 if (sv_isobject(sv)) {
179 classname = sv_reftype(SvRV(sv),TRUE);
181 classname = SvPV_nolen(sv);
184 if (strEQ(name,classname))
189 mXPUSHs(newSVpv(name, 0));
192 methodname = newSVpvs_flags("isa", SVs_TEMP);
193 /* ugly hack: use the SvSCREAM flag so S_method_common
194 * can figure out we're calling DOES() and not isa(),
195 * and report eventual errors correctly. --rgs */
196 SvSCREAM_on(methodname);
197 call_sv(methodname, G_SCALAR | G_METHOD);
200 does_it = SvTRUE( TOPs );
207 PERL_XS_EXPORT_C void XS_UNIVERSAL_isa(pTHX_ CV *cv);
208 PERL_XS_EXPORT_C void XS_UNIVERSAL_can(pTHX_ CV *cv);
209 PERL_XS_EXPORT_C void XS_UNIVERSAL_DOES(pTHX_ CV *cv);
210 PERL_XS_EXPORT_C void XS_UNIVERSAL_VERSION(pTHX_ CV *cv);
212 XS(XS_version_stringify);
213 XS(XS_version_numify);
214 XS(XS_version_normal);
216 XS(XS_version_boolean);
217 #ifdef HASATTRIBUTE_NORETURN
218 XS(XS_version_noop) __attribute__noreturn__;
222 XS(XS_version_is_alpha);
229 XS(XS_utf8_downgrade);
230 XS(XS_utf8_unicode_to_native);
231 XS(XS_utf8_native_to_unicode);
232 XS(XS_Internals_SvREADONLY);
233 XS(XS_Internals_SvREFCNT);
234 XS(XS_Internals_hv_clear_placehold);
235 XS(XS_PerlIO_get_layers);
236 XS(XS_Internals_hash_seed);
237 XS(XS_Internals_rehash_seed);
238 XS(XS_Internals_HvREHASH);
242 XS(XS_re_regnames_count);
243 XS(XS_re_regexp_pattern);
244 XS(XS_Tie_Hash_NamedCapture_FETCH);
245 XS(XS_Tie_Hash_NamedCapture_STORE);
246 XS(XS_Tie_Hash_NamedCapture_DELETE);
247 XS(XS_Tie_Hash_NamedCapture_CLEAR);
248 XS(XS_Tie_Hash_NamedCapture_EXISTS);
249 XS(XS_Tie_Hash_NamedCapture_FIRSTK);
250 XS(XS_Tie_Hash_NamedCapture_NEXTK);
251 XS(XS_Tie_Hash_NamedCapture_SCALAR);
252 XS(XS_Tie_Hash_NamedCapture_flags);
255 Perl_boot_core_UNIVERSAL(pTHX)
258 static const char file[] = __FILE__;
260 newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file);
261 newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file);
262 newXS("UNIVERSAL::DOES", XS_UNIVERSAL_DOES, file);
263 newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file);
265 /* register the overloading (type 'A') magic */
266 PL_amagic_generation++;
267 /* Make it findable via fetchmethod */
268 newXS("version::()", XS_version_noop, file);
269 newXS("version::new", XS_version_new, file);
270 newXS("version::(\"\"", XS_version_stringify, file);
271 newXS("version::stringify", XS_version_stringify, file);
272 newXS("version::(0+", XS_version_numify, file);
273 newXS("version::numify", XS_version_numify, file);
274 newXS("version::normal", XS_version_normal, file);
275 newXS("version::(cmp", XS_version_vcmp, file);
276 newXS("version::(<=>", XS_version_vcmp, file);
277 newXS("version::vcmp", XS_version_vcmp, file);
278 newXS("version::(bool", XS_version_boolean, file);
279 newXS("version::boolean", XS_version_boolean, file);
280 newXS("version::(nomethod", XS_version_noop, file);
281 newXS("version::noop", XS_version_noop, file);
282 newXS("version::is_alpha", XS_version_is_alpha, file);
283 newXS("version::qv", XS_version_qv, file);
285 newXS("utf8::is_utf8", XS_utf8_is_utf8, file);
286 newXS("utf8::valid", XS_utf8_valid, file);
287 newXS("utf8::encode", XS_utf8_encode, file);
288 newXS("utf8::decode", XS_utf8_decode, file);
289 newXS("utf8::upgrade", XS_utf8_upgrade, file);
290 newXS("utf8::downgrade", XS_utf8_downgrade, file);
291 newXS("utf8::native_to_unicode", XS_utf8_native_to_unicode, file);
292 newXS("utf8::unicode_to_native", XS_utf8_unicode_to_native, file);
293 newXSproto("Internals::SvREADONLY",XS_Internals_SvREADONLY, file, "\\[$%@];$");
294 newXSproto("Internals::SvREFCNT",XS_Internals_SvREFCNT, file, "\\[$%@];$");
295 newXSproto("Internals::hv_clear_placeholders",
296 XS_Internals_hv_clear_placehold, file, "\\%");
297 newXSproto("PerlIO::get_layers",
298 XS_PerlIO_get_layers, file, "*;@");
299 /* Providing a Regexp::DESTROY fixes #21347. See test in t/op/ref.t */
300 CvFILE(newCONSTSUB(get_hv("Regexp::", GV_ADD), "DESTROY", NULL))
302 newXSproto("Internals::hash_seed",XS_Internals_hash_seed, file, "");
303 newXSproto("Internals::rehash_seed",XS_Internals_rehash_seed, file, "");
304 newXSproto("Internals::HvREHASH", XS_Internals_HvREHASH, file, "\\%");
305 newXSproto("re::is_regexp", XS_re_is_regexp, file, "$");
306 newXSproto("re::regname", XS_re_regname, file, ";$$");
307 newXSproto("re::regnames", XS_re_regnames, file, ";$");
308 newXSproto("re::regnames_count", XS_re_regnames_count, file, "");
309 newXSproto("re::regexp_pattern", XS_re_regexp_pattern, file, "$");
310 newXS("Tie::Hash::NamedCapture::FETCH", XS_Tie_Hash_NamedCapture_FETCH, file);
311 newXS("Tie::Hash::NamedCapture::STORE", XS_Tie_Hash_NamedCapture_STORE, file);
312 newXS("Tie::Hash::NamedCapture::DELETE", XS_Tie_Hash_NamedCapture_DELETE, file);
313 newXS("Tie::Hash::NamedCapture::CLEAR", XS_Tie_Hash_NamedCapture_CLEAR, file);
314 newXS("Tie::Hash::NamedCapture::EXISTS", XS_Tie_Hash_NamedCapture_EXISTS, file);
315 newXS("Tie::Hash::NamedCapture::FIRSTKEY", XS_Tie_Hash_NamedCapture_FIRSTK, file);
316 newXS("Tie::Hash::NamedCapture::NEXTKEY", XS_Tie_Hash_NamedCapture_NEXTK, file);
317 newXS("Tie::Hash::NamedCapture::SCALAR", XS_Tie_Hash_NamedCapture_SCALAR, file);
318 newXS("Tie::Hash::NamedCapture::flags", XS_Tie_Hash_NamedCapture_flags, file);
322 =for apidoc croak_xs_usage
324 A specialised variant of C<croak()> for emitting the usage message for xsubs
326 croak_xs_usage(cv, "eee_yow");
328 works out the package name and subroutine name from C<cv>, and then calls
329 C<croak()>. Hence if C<cv> is C<&ouch::awk>, it would call C<croak> as:
331 Perl_croak(aTHX_ "Usage %s::%s(%s)", "ouch" "awk", "eee_yow");
337 Perl_croak_xs_usage(pTHX_ const CV *const cv, const char *const params)
339 const GV *const gv = CvGV(cv);
341 PERL_ARGS_ASSERT_CROAK_XS_USAGE;
344 const char *const gvname = GvNAME(gv);
345 const HV *const stash = GvSTASH(gv);
346 const char *const hvname = stash ? HvNAME_get(stash) : NULL;
349 Perl_croak(aTHX_ "Usage: %s::%s(%s)", hvname, gvname, params);
351 Perl_croak(aTHX_ "Usage: %s(%s)", gvname, params);
353 /* Pants. I don't think that it should be possible to get here. */
354 Perl_croak(aTHX_ "Usage: CODE(0x%"UVxf")(%s)", PTR2UV(cv), params);
364 croak_xs_usage(cv, "reference, kind");
366 SV * const sv = ST(0);
371 if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))
372 || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv))))
375 name = SvPV_nolen_const(ST(1));
377 ST(0) = boolSV(sv_derived_from(sv, name));
392 croak_xs_usage(cv, "object-ref, method");
398 if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))
399 || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv))))
402 name = SvPV_nolen_const(ST(1));
406 sv = MUTABLE_SV(SvRV(sv));
411 pkg = gv_stashsv(sv, 0);
415 GV * const gv = gv_fetchmethod_autoload(pkg, name, FALSE);
417 rv = sv_2mortal(newRV(MUTABLE_SV(GvCV(gv))));
424 XS(XS_UNIVERSAL_DOES)
431 Perl_croak(aTHX_ "Usage: invocant->DOES(kind)");
433 SV * const sv = ST(0);
436 name = SvPV_nolen_const(ST(1));
437 if (sv_does( sv, name ))
444 XS(XS_UNIVERSAL_VERSION)
456 sv = MUTABLE_SV(SvRV(ST(0)));
458 Perl_croak(aTHX_ "Cannot find version of an unblessed reference");
462 pkg = gv_stashsv(ST(0), 0);
465 gvp = pkg ? (GV**)hv_fetchs(pkg, "VERSION", FALSE) : NULL;
467 if (gvp && isGV(gv = *gvp) && (sv = GvSV(gv)) && SvOK(sv)) {
468 SV * const nsv = sv_newmortal();
471 if ( !sv_derived_from(sv, "version"))
472 upg_version(sv, FALSE);
485 const char * const name = HvNAME_get(pkg);
487 "%s does not define $%s::VERSION--version check failed",
491 "%s defines neither package nor VERSION--version check failed",
492 SvPVx_nolen_const(ST(0)) );
496 if ( !sv_derived_from(req, "version")) {
497 /* req may very well be R/O, so create a new object */
498 req = sv_2mortal( new_version(req) );
501 if ( vcmp( req, sv ) > 0 ) {
502 if ( hv_exists(MUTABLE_HV(SvRV(req)), "qv", 2 ) ) {
503 Perl_croak(aTHX_ "%s version %"SVf" required--"
504 "this is only version %"SVf"", HvNAME_get(pkg),
505 SVfARG(vnormal(req)),
506 SVfARG(vnormal(sv)));
508 Perl_croak(aTHX_ "%s version %"SVf" required--"
509 "this is only version %"SVf"", HvNAME_get(pkg),
510 SVfARG(vstringify(req)),
511 SVfARG(vstringify(sv)));
517 if ( SvOK(sv) && sv_derived_from(sv, "version") ) {
518 ST(0) = vstringify(sv);
531 croak_xs_usage(cv, "class, version");
536 const char * const classname =
537 sv_isobject(ST(0)) /* get the class if called as an object method */
538 ? HvNAME(SvSTASH(SvRV(ST(0))))
539 : (char *)SvPV_nolen(ST(0));
541 if ( items == 1 || vs == &PL_sv_undef ) { /* no param or explicit undef */
542 /* create empty object */
546 else if ( items == 3 ) {
548 Perl_sv_setpvf(aTHX_ vs,"v%s",SvPV_nolen_const(ST(2)));
551 rv = new_version(vs);
552 if ( strcmp(classname,"version") != 0 ) /* inherited new() */
553 sv_bless(rv, gv_stashpv(classname, GV_ADD));
561 XS(XS_version_stringify)
566 croak_xs_usage(cv, "lobj, ...");
571 if (sv_derived_from(ST(0), "version")) {
575 Perl_croak(aTHX_ "lobj is not of type version");
577 mPUSHs(vstringify(lobj));
584 XS(XS_version_numify)
589 croak_xs_usage(cv, "lobj, ...");
594 if (sv_derived_from(ST(0), "version")) {
598 Perl_croak(aTHX_ "lobj is not of type version");
600 mPUSHs(vnumify(lobj));
607 XS(XS_version_normal)
612 croak_xs_usage(cv, "lobj, ...");
617 if (sv_derived_from(ST(0), "version")) {
621 Perl_croak(aTHX_ "lobj is not of type version");
623 mPUSHs(vnormal(lobj));
635 croak_xs_usage(cv, "lobj, ...");
640 if (sv_derived_from(ST(0), "version")) {
644 Perl_croak(aTHX_ "lobj is not of type version");
650 const IV swap = (IV)SvIV(ST(2));
652 if ( ! sv_derived_from(robj, "version") )
654 robj = new_version(robj);
660 rs = newSViv(vcmp(rvs,lobj));
664 rs = newSViv(vcmp(lobj,rvs));
675 XS(XS_version_boolean)
680 croak_xs_usage(cv, "lobj, ...");
682 if (sv_derived_from(ST(0), "version")) {
683 SV * const lobj = SvRV(ST(0));
684 SV * const rs = newSViv( vcmp(lobj,new_version(newSVpvs("0"))) );
690 Perl_croak(aTHX_ "lobj is not of type version");
698 croak_xs_usage(cv, "lobj, ...");
699 if (sv_derived_from(ST(0), "version"))
700 Perl_croak(aTHX_ "operation not supported with version object");
702 Perl_croak(aTHX_ "lobj is not of type version");
703 #ifndef HASATTRIBUTE_NORETURN
708 XS(XS_version_is_alpha)
713 croak_xs_usage(cv, "lobj");
715 if (sv_derived_from(ST(0), "version")) {
716 SV * const lobj = ST(0);
717 if ( hv_exists(MUTABLE_HV(SvRV(lobj)), "alpha", 5 ) )
725 Perl_croak(aTHX_ "lobj is not of type version");
733 croak_xs_usage(cv, "ver");
737 if ( !SvVOK(ver) ) { /* only need to do with if not already v-string */
738 SV * const rv = sv_newmortal();
739 sv_setsv(rv,ver); /* make a duplicate */
740 upg_version(rv, TRUE);
745 mPUSHs(new_version(ver));
758 croak_xs_usage(cv, "sv");
760 const SV * const sv = ST(0);
774 croak_xs_usage(cv, "sv");
776 SV * const sv = ST(0);
778 const char * const s = SvPV_const(sv,len);
779 if (!SvUTF8(sv) || is_utf8_string((const U8*)s,len))
792 croak_xs_usage(cv, "sv");
793 sv_utf8_encode(ST(0));
802 croak_xs_usage(cv, "sv");
804 SV * const sv = ST(0);
805 const bool RETVAL = sv_utf8_decode(sv);
806 ST(0) = boolSV(RETVAL);
817 croak_xs_usage(cv, "sv");
819 SV * const sv = ST(0);
823 RETVAL = sv_utf8_upgrade(sv);
824 XSprePUSH; PUSHi((IV)RETVAL);
829 XS(XS_utf8_downgrade)
833 if (items < 1 || items > 2)
834 croak_xs_usage(cv, "sv, failok=0");
836 SV * const sv = ST(0);
837 const bool failok = (items < 2) ? 0 : (int)SvIV(ST(1));
838 const bool RETVAL = sv_utf8_downgrade(sv, failok);
840 ST(0) = boolSV(RETVAL);
846 XS(XS_utf8_native_to_unicode)
850 const UV uv = SvUV(ST(0));
853 croak_xs_usage(cv, "sv");
855 ST(0) = sv_2mortal(newSViv(NATIVE_TO_UNI(uv)));
859 XS(XS_utf8_unicode_to_native)
863 const UV uv = SvUV(ST(0));
866 croak_xs_usage(cv, "sv");
868 ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv)));
872 XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */
876 SV * const sv = SvRV(ST(0));
885 else if (items == 2) {
891 /* I hope you really know what you are doing. */
896 XSRETURN_UNDEF; /* Can't happen. */
899 XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */
903 SV * const sv = SvRV(ST(0));
907 XSRETURN_IV(SvREFCNT(sv) - 1); /* Minus the ref created for us. */
908 else if (items == 2) {
909 /* I hope you really know what you are doing. */
910 SvREFCNT(sv) = SvIV(ST(1));
911 XSRETURN_IV(SvREFCNT(sv));
913 XSRETURN_UNDEF; /* Can't happen. */
916 XS(XS_Internals_hv_clear_placehold)
922 croak_xs_usage(cv, "hv");
924 HV * const hv = MUTABLE_HV(SvRV(ST(0)));
925 hv_clear_placeholders(hv);
930 XS(XS_PerlIO_get_layers)
934 if (items < 1 || items % 2 == 0)
935 croak_xs_usage(cv, "filehandle[,args]");
942 bool details = FALSE;
946 for (svp = MARK + 2; svp <= SP; svp += 2) {
947 SV * const * const varp = svp;
948 SV * const * const valp = svp + 1;
950 const char * const key = SvPV_const(*varp, klen);
954 if (klen == 5 && memEQ(key, "input", 5)) {
955 input = SvTRUE(*valp);
960 if (klen == 6 && memEQ(key, "output", 6)) {
961 input = !SvTRUE(*valp);
966 if (klen == 7 && memEQ(key, "details", 7)) {
967 details = SvTRUE(*valp);
974 "get_layers: unknown argument '%s'",
986 if (SvROK(sv) && isGV(SvRV(sv)))
987 gv = MUTABLE_GV(SvRV(sv));
989 gv = gv_fetchsv(sv, 0, SVt_PVIO);
992 if (gv && (io = GvIO(gv))) {
993 AV* const av = PerlIO_get_layers(aTHX_ input ?
994 IoIFP(io) : IoOFP(io));
996 const I32 last = av_len(av);
999 for (i = last; i >= 0; i -= 3) {
1000 SV * const * const namsvp = av_fetch(av, i - 2, FALSE);
1001 SV * const * const argsvp = av_fetch(av, i - 1, FALSE);
1002 SV * const * const flgsvp = av_fetch(av, i, FALSE);
1004 const bool namok = namsvp && *namsvp && SvPOK(*namsvp);
1005 const bool argok = argsvp && *argsvp && SvPOK(*argsvp);
1006 const bool flgok = flgsvp && *flgsvp && SvIOK(*flgsvp);
1009 /* Indents of 5? Yuck. */
1010 /* We know that PerlIO_get_layers creates a new SV for
1011 the name and flags, so we can just take a reference
1012 and "steal" it when we free the AV below. */
1014 ? sv_2mortal(SvREFCNT_inc_simple_NN(*namsvp))
1017 ? newSVpvn_flags(SvPVX_const(*argsvp),
1019 (SvUTF8(*argsvp) ? SVf_UTF8 : 0)
1023 ? sv_2mortal(SvREFCNT_inc_simple_NN(*flgsvp))
1029 XPUSHs(sv_2mortal(Perl_newSVpvf(aTHX_ "%"SVf"(%"SVf")",
1033 XPUSHs(sv_2mortal(SvREFCNT_inc_simple_NN(*namsvp)));
1035 XPUSHs(&PL_sv_undef);
1038 const IV flags = SvIVX(*flgsvp);
1040 if (flags & PERLIO_F_UTF8) {
1041 XPUSHs(newSVpvs_flags("utf8", SVs_TEMP));
1058 XS(XS_Internals_hash_seed)
1061 /* Using dXSARGS would also have dITEM and dSP,
1062 * which define 2 unused local variables. */
1064 PERL_UNUSED_ARG(cv);
1065 PERL_UNUSED_VAR(mark);
1066 XSRETURN_UV(PERL_HASH_SEED);
1069 XS(XS_Internals_rehash_seed)
1072 /* Using dXSARGS would also have dITEM and dSP,
1073 * which define 2 unused local variables. */
1075 PERL_UNUSED_ARG(cv);
1076 PERL_UNUSED_VAR(mark);
1077 XSRETURN_UV(PL_rehash_seed);
1080 XS(XS_Internals_HvREHASH) /* Subject to change */
1084 PERL_UNUSED_ARG(cv);
1086 const HV * const hv = (const HV *) SvRV(ST(0));
1087 if (items == 1 && SvTYPE(hv) == SVt_PVHV) {
1094 Perl_croak(aTHX_ "Internals::HvREHASH $hashref");
1101 PERL_UNUSED_VAR(cv);
1104 croak_xs_usage(cv, "sv");
1108 if (SvRXOK(ST(0))) {
1115 XS(XS_re_regnames_count)
1117 REGEXP *rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
1123 croak_xs_usage(cv, "");
1130 ret = CALLREG_NAMED_BUFF_COUNT(rx);
1151 if (items < 1 || items > 2)
1152 croak_xs_usage(cv, "name[, all ]");
1156 rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
1161 if (items == 2 && SvTRUE(ST(1))) {
1166 ret = CALLREG_NAMED_BUFF_FETCH(rx, ST(0), (flags | RXapif_REGNAME));
1189 croak_xs_usage(cv, "[all]");
1191 rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
1196 if (items == 1 && SvTRUE(ST(0))) {
1204 ret = CALLREG_NAMED_BUFF_ALL(rx, (flags | RXapif_REGNAMES));
1213 av = MUTABLE_AV(SvRV(ret));
1214 length = av_len(av);
1216 for (i = 0; i <= length; i++) {
1217 entry = av_fetch(av, i, FALSE);
1220 Perl_croak(aTHX_ "NULL array element in re::regnames()");
1222 mXPUSHs(SvREFCNT_inc_simple_NN(*entry));
1231 XS(XS_re_regexp_pattern)
1238 croak_xs_usage(cv, "sv");
1243 Checks if a reference is a regex or not. If the parameter is
1244 not a ref, or is not the result of a qr// then returns false
1245 in scalar context and an empty list in list context.
1246 Otherwise in list context it returns the pattern and the
1247 modifiers, in scalar context it returns the pattern just as it
1248 would if the qr// was stringified normally, regardless as
1249 to the class of the variable and any strigification overloads
1253 if ((re = SvRX(ST(0)))) /* assign deliberate */
1255 /* Housten, we have a regex! */
1260 if ( GIMME_V == G_ARRAY ) {
1262 we are in list context so stringify
1263 the modifiers that apply. We ignore "negative
1264 modifiers" in this scenario.
1267 const char *fptr = INT_PAT_MODS;
1269 U16 match_flags = (U16)((RX_EXTFLAGS(re) & PMf_COMPILETIME)
1270 >> RXf_PMf_STD_PMMOD_SHIFT);
1272 while((ch = *fptr++)) {
1273 if(match_flags & 1) {
1274 reflags[left++] = ch;
1279 pattern = newSVpvn_flags(RX_PRECOMP(re),RX_PRELEN(re),
1280 (RX_UTF8(re) ? SVf_UTF8 : 0) | SVs_TEMP);
1282 /* return the pattern and the modifiers */
1284 XPUSHs(newSVpvn_flags(reflags, left, SVs_TEMP));
1287 /* Scalar, so use the string that Perl would return */
1288 /* return the pattern in (?msix:..) format */
1289 #if PERL_VERSION >= 11
1290 pattern = sv_2mortal(newSVsv(MUTABLE_SV(re)));
1292 pattern = newSVpvn_flags(RX_WRAPPED(re), RX_WRAPLEN(re),
1293 (RX_UTF8(re) ? SVf_UTF8 : 0) | SVs_TEMP);
1299 /* It ain't a regexp folks */
1300 if ( GIMME_V == G_ARRAY ) {
1301 /* return the empty list */
1304 /* Because of the (?:..) wrapping involved in a
1305 stringified pattern it is impossible to get a
1306 result for a real regexp that would evaluate to
1307 false. Therefore we can return PL_sv_no to signify
1308 that the object is not a regex, this means that one
1311 if (regex($might_be_a_regex) eq '(?:foo)') { }
1313 and not worry about undefined values.
1321 XS(XS_Tie_Hash_NamedCapture_FETCH)
1330 croak_xs_usage(cv, "$key, $flags");
1332 rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
1339 flags = (U32)INT2PTR(IV,SvIV(SvRV(MUTABLE_SV(ST(0)))));
1340 ret = CALLREG_NAMED_BUFF_FETCH(rx, ST(1), flags);
1352 XS(XS_Tie_Hash_NamedCapture_STORE)
1360 croak_xs_usage(cv, "$key, $value, $flags");
1362 rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
1366 Perl_croak(aTHX_ "%s", PL_no_modify);
1373 flags = (U32)INT2PTR(IV,SvIV(SvRV(MUTABLE_SV(ST(0)))));
1374 CALLREG_NAMED_BUFF_STORE(rx,ST(1), ST(2), flags);
1377 XS(XS_Tie_Hash_NamedCapture_DELETE)
1381 REGEXP * rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
1385 croak_xs_usage(cv, "$key, $flags");
1388 Perl_croak(aTHX_ "%s", PL_no_modify);
1392 flags = (U32)INT2PTR(IV,SvIV(SvRV(MUTABLE_SV(ST(0)))));
1393 CALLREG_NAMED_BUFF_DELETE(rx, ST(1), flags);
1396 XS(XS_Tie_Hash_NamedCapture_CLEAR)
1404 croak_xs_usage(cv, "$flags");
1406 rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
1409 Perl_croak(aTHX_ "%s", PL_no_modify);
1413 flags = (U32)INT2PTR(IV,SvIV(SvRV(MUTABLE_SV(ST(0)))));
1414 CALLREG_NAMED_BUFF_CLEAR(rx, flags);
1417 XS(XS_Tie_Hash_NamedCapture_EXISTS)
1426 croak_xs_usage(cv, "$key, $flags");
1428 rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
1435 flags = (U32)INT2PTR(IV,SvIV(SvRV(MUTABLE_SV(ST(0)))));
1436 ret = CALLREG_NAMED_BUFF_EXISTS(rx, ST(1), flags);
1445 XS(XS_Tie_Hash_NamedCapture_FIRSTK)
1454 croak_xs_usage(cv, "");
1456 rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
1463 flags = (U32)INT2PTR(IV,SvIV(SvRV(MUTABLE_SV(ST(0)))));
1464 ret = CALLREG_NAMED_BUFF_FIRSTKEY(rx, flags);
1477 XS(XS_Tie_Hash_NamedCapture_NEXTK)
1486 croak_xs_usage(cv, "$lastkey");
1488 rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
1495 flags = (U32)INT2PTR(IV,SvIV(SvRV(MUTABLE_SV(ST(0)))));
1496 ret = CALLREG_NAMED_BUFF_NEXTKEY(rx, ST(1), flags);
1508 XS(XS_Tie_Hash_NamedCapture_SCALAR)
1517 croak_xs_usage(cv, "");
1519 rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
1526 flags = (U32)INT2PTR(IV,SvIV(SvRV(MUTABLE_SV(ST(0)))));
1527 ret = CALLREG_NAMED_BUFF_SCALAR(rx, flags);
1540 XS(XS_Tie_Hash_NamedCapture_flags)
1546 croak_xs_usage(cv, "");
1548 mXPUSHu(RXapif_ONE);
1549 mXPUSHu(RXapif_ALL);
1557 * c-indentation-style: bsd
1559 * indent-tabs-mode: t
1562 * ex: set ts=8 sts=4 sw=4 noet: