| 1 | /* universal.c |
| 2 | * |
| 3 | * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
| 4 | * 2005, 2006, 2007, 2008 by Larry Wall and others |
| 5 | * |
| 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. |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | /* |
| 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 |
| 15 | * |
| 16 | * [p.54 of _The Lord of the Rings_, I/ii: "The Shadow of the Past"] |
| 17 | */ |
| 18 | |
| 19 | /* This file contains the code that implements the functions in Perl's |
| 20 | * UNIVERSAL package, such as UNIVERSAL->can(). |
| 21 | * |
| 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 separate XS files which would then be pulled |
| 25 | * in by some to-be-written build process. |
| 26 | */ |
| 27 | |
| 28 | #include "EXTERN.h" |
| 29 | #define PERL_IN_UNIVERSAL_C |
| 30 | #include "perl.h" |
| 31 | |
| 32 | #ifdef USE_PERLIO |
| 33 | #include "perliol.h" /* For the PERLIO_F_XXX */ |
| 34 | #endif |
| 35 | |
| 36 | /* |
| 37 | * Contributed by Graham Barr <Graham.Barr@tiuk.ti.com> |
| 38 | * The main guts of traverse_isa was actually copied from gv_fetchmeth |
| 39 | */ |
| 40 | |
| 41 | STATIC bool |
| 42 | S_isa_lookup(pTHX_ HV *stash, const char * const name, STRLEN len, U32 flags) |
| 43 | { |
| 44 | dVAR; |
| 45 | const struct mro_meta *const meta = HvMROMETA(stash); |
| 46 | HV *isa = meta->isa; |
| 47 | const HV *our_stash; |
| 48 | |
| 49 | PERL_ARGS_ASSERT_ISA_LOOKUP; |
| 50 | |
| 51 | if (!isa) { |
| 52 | (void)mro_get_linear_isa(stash); |
| 53 | isa = meta->isa; |
| 54 | } |
| 55 | |
| 56 | if (hv_common(isa, NULL, name, len, ( flags & SVf_UTF8 ? HVhek_UTF8 : 0), |
| 57 | HV_FETCH_ISEXISTS, NULL, 0)) { |
| 58 | /* Direct name lookup worked. */ |
| 59 | return TRUE; |
| 60 | } |
| 61 | |
| 62 | /* A stash/class can go by many names (ie. User == main::User), so |
| 63 | we use the HvENAME in the stash itself, which is canonical, falling |
| 64 | back to HvNAME if necessary. */ |
| 65 | our_stash = gv_stashpvn(name, len, flags); |
| 66 | |
| 67 | if (our_stash) { |
| 68 | HEK *canon_name = HvENAME_HEK(our_stash); |
| 69 | if (!canon_name) canon_name = HvNAME_HEK(our_stash); |
| 70 | |
| 71 | if (hv_common(isa, NULL, HEK_KEY(canon_name), HEK_LEN(canon_name), |
| 72 | HEK_FLAGS(canon_name), |
| 73 | HV_FETCH_ISEXISTS, NULL, HEK_HASH(canon_name))) { |
| 74 | return TRUE; |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | return FALSE; |
| 79 | } |
| 80 | |
| 81 | /* |
| 82 | =head1 SV Manipulation Functions |
| 83 | |
| 84 | =for apidoc sv_derived_from_pvn |
| 85 | |
| 86 | Returns a boolean indicating whether the SV is derived from the specified class |
| 87 | I<at the C level>. To check derivation at the Perl level, call C<isa()> as a |
| 88 | normal Perl method. |
| 89 | |
| 90 | Currently, the only significant value for C<flags> is SVf_UTF8. |
| 91 | |
| 92 | =cut |
| 93 | |
| 94 | =for apidoc sv_derived_from_sv |
| 95 | |
| 96 | Exactly like L</sv_derived_from_pvn>, but takes the name string in the form |
| 97 | of an SV instead of a string/length pair. |
| 98 | |
| 99 | =cut |
| 100 | |
| 101 | */ |
| 102 | |
| 103 | bool |
| 104 | Perl_sv_derived_from_sv(pTHX_ SV *sv, SV *namesv, U32 flags) |
| 105 | { |
| 106 | char *namepv; |
| 107 | STRLEN namelen; |
| 108 | PERL_ARGS_ASSERT_SV_DERIVED_FROM_SV; |
| 109 | namepv = SvPV(namesv, namelen); |
| 110 | if (SvUTF8(namesv)) |
| 111 | flags |= SVf_UTF8; |
| 112 | return sv_derived_from_pvn(sv, namepv, namelen, flags); |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | =for apidoc sv_derived_from |
| 117 | |
| 118 | Exactly like L</sv_derived_from_pv>, but doesn't take a C<flags> parameter. |
| 119 | |
| 120 | =cut |
| 121 | */ |
| 122 | |
| 123 | bool |
| 124 | Perl_sv_derived_from(pTHX_ SV *sv, const char *const name) |
| 125 | { |
| 126 | PERL_ARGS_ASSERT_SV_DERIVED_FROM; |
| 127 | return sv_derived_from_pvn(sv, name, strlen(name), 0); |
| 128 | } |
| 129 | |
| 130 | /* |
| 131 | =for apidoc sv_derived_from_pv |
| 132 | |
| 133 | Exactly like L</sv_derived_from_pvn>, but takes a nul-terminated string |
| 134 | instead of a string/length pair. |
| 135 | |
| 136 | =cut |
| 137 | */ |
| 138 | |
| 139 | |
| 140 | bool |
| 141 | Perl_sv_derived_from_pv(pTHX_ SV *sv, const char *const name, U32 flags) |
| 142 | { |
| 143 | PERL_ARGS_ASSERT_SV_DERIVED_FROM_PV; |
| 144 | return sv_derived_from_pvn(sv, name, strlen(name), flags); |
| 145 | } |
| 146 | |
| 147 | bool |
| 148 | Perl_sv_derived_from_pvn(pTHX_ SV *sv, const char *const name, const STRLEN len, U32 flags) |
| 149 | { |
| 150 | dVAR; |
| 151 | HV *stash; |
| 152 | |
| 153 | PERL_ARGS_ASSERT_SV_DERIVED_FROM_PVN; |
| 154 | |
| 155 | SvGETMAGIC(sv); |
| 156 | |
| 157 | if (SvROK(sv)) { |
| 158 | const char *type; |
| 159 | sv = SvRV(sv); |
| 160 | type = sv_reftype(sv,0); |
| 161 | if (type && strEQ(type,name)) |
| 162 | return TRUE; |
| 163 | stash = SvOBJECT(sv) ? SvSTASH(sv) : NULL; |
| 164 | } |
| 165 | else { |
| 166 | stash = gv_stashsv(sv, 0); |
| 167 | if (!stash) |
| 168 | stash = gv_stashpv("UNIVERSAL", 0); |
| 169 | } |
| 170 | |
| 171 | return stash ? isa_lookup(stash, name, len, flags) : FALSE; |
| 172 | } |
| 173 | |
| 174 | /* |
| 175 | =for apidoc sv_does_sv |
| 176 | |
| 177 | Returns a boolean indicating whether the SV performs a specific, named role. |
| 178 | The SV can be a Perl object or the name of a Perl class. |
| 179 | |
| 180 | =cut |
| 181 | */ |
| 182 | |
| 183 | #include "XSUB.h" |
| 184 | |
| 185 | bool |
| 186 | Perl_sv_does_sv(pTHX_ SV *sv, SV *namesv, U32 flags) |
| 187 | { |
| 188 | SV *classname; |
| 189 | bool does_it; |
| 190 | SV *methodname; |
| 191 | dSP; |
| 192 | |
| 193 | PERL_ARGS_ASSERT_SV_DOES_SV; |
| 194 | PERL_UNUSED_ARG(flags); |
| 195 | |
| 196 | ENTER; |
| 197 | SAVETMPS; |
| 198 | |
| 199 | SvGETMAGIC(sv); |
| 200 | |
| 201 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) { |
| 202 | LEAVE; |
| 203 | return FALSE; |
| 204 | } |
| 205 | |
| 206 | if (sv_isobject(sv)) { |
| 207 | classname = sv_ref(NULL,SvRV(sv),TRUE); |
| 208 | } else { |
| 209 | classname = sv; |
| 210 | } |
| 211 | |
| 212 | if (sv_eq(classname, namesv)) { |
| 213 | LEAVE; |
| 214 | return TRUE; |
| 215 | } |
| 216 | |
| 217 | PUSHMARK(SP); |
| 218 | EXTEND(SP, 2); |
| 219 | PUSHs(sv); |
| 220 | PUSHs(namesv); |
| 221 | PUTBACK; |
| 222 | |
| 223 | methodname = newSVpvs_flags("isa", SVs_TEMP); |
| 224 | /* ugly hack: use the SvSCREAM flag so S_method_common |
| 225 | * can figure out we're calling DOES() and not isa(), |
| 226 | * and report eventual errors correctly. --rgs */ |
| 227 | SvSCREAM_on(methodname); |
| 228 | call_sv(methodname, G_SCALAR | G_METHOD); |
| 229 | SPAGAIN; |
| 230 | |
| 231 | does_it = SvTRUE( TOPs ); |
| 232 | FREETMPS; |
| 233 | LEAVE; |
| 234 | |
| 235 | return does_it; |
| 236 | } |
| 237 | |
| 238 | /* |
| 239 | =for apidoc sv_does |
| 240 | |
| 241 | Like L</sv_does_pv>, but doesn't take a C<flags> parameter. |
| 242 | |
| 243 | =cut |
| 244 | */ |
| 245 | |
| 246 | bool |
| 247 | Perl_sv_does(pTHX_ SV *sv, const char *const name) |
| 248 | { |
| 249 | PERL_ARGS_ASSERT_SV_DOES; |
| 250 | return sv_does_sv(sv, newSVpvn_flags(name, strlen(name), SVs_TEMP), 0); |
| 251 | } |
| 252 | |
| 253 | /* |
| 254 | =for apidoc sv_does_pv |
| 255 | |
| 256 | Like L</sv_does_sv>, but takes a nul-terminated string instead of an SV. |
| 257 | |
| 258 | =cut |
| 259 | */ |
| 260 | |
| 261 | |
| 262 | bool |
| 263 | Perl_sv_does_pv(pTHX_ SV *sv, const char *const name, U32 flags) |
| 264 | { |
| 265 | PERL_ARGS_ASSERT_SV_DOES_PV; |
| 266 | return sv_does_sv(sv, newSVpvn_flags(name, strlen(name), SVs_TEMP | flags), flags); |
| 267 | } |
| 268 | |
| 269 | /* |
| 270 | =for apidoc sv_does_pvn |
| 271 | |
| 272 | Like L</sv_does_sv>, but takes a string/length pair instead of an SV. |
| 273 | |
| 274 | =cut |
| 275 | */ |
| 276 | |
| 277 | bool |
| 278 | Perl_sv_does_pvn(pTHX_ SV *sv, const char *const name, const STRLEN len, U32 flags) |
| 279 | { |
| 280 | PERL_ARGS_ASSERT_SV_DOES_PVN; |
| 281 | |
| 282 | return sv_does_sv(sv, newSVpvn_flags(name, len, flags | SVs_TEMP), flags); |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | =for apidoc croak_xs_usage |
| 287 | |
| 288 | A specialised variant of C<croak()> for emitting the usage message for xsubs |
| 289 | |
| 290 | croak_xs_usage(cv, "eee_yow"); |
| 291 | |
| 292 | works out the package name and subroutine name from C<cv>, and then calls |
| 293 | C<croak()>. Hence if C<cv> is C<&ouch::awk>, it would call C<croak> as: |
| 294 | |
| 295 | Perl_croak(aTHX_ "Usage: %"SVf"::%"SVf"(%s)", "ouch" "awk", "eee_yow"); |
| 296 | |
| 297 | =cut |
| 298 | */ |
| 299 | |
| 300 | void |
| 301 | Perl_croak_xs_usage(pTHX_ const CV *const cv, const char *const params) |
| 302 | { |
| 303 | const GV *const gv = CvGV(cv); |
| 304 | |
| 305 | PERL_ARGS_ASSERT_CROAK_XS_USAGE; |
| 306 | |
| 307 | if (gv) { |
| 308 | const HV *const stash = GvSTASH(gv); |
| 309 | |
| 310 | if (HvNAME_get(stash)) |
| 311 | Perl_croak(aTHX_ "Usage: %"HEKf"::%"HEKf"(%s)", |
| 312 | HEKfARG(HvNAME_HEK(stash)), |
| 313 | HEKfARG(GvNAME_HEK(gv)), |
| 314 | params); |
| 315 | else |
| 316 | Perl_croak(aTHX_ "Usage: %"HEKf"(%s)", |
| 317 | HEKfARG(GvNAME_HEK(gv)), params); |
| 318 | } else { |
| 319 | /* Pants. I don't think that it should be possible to get here. */ |
| 320 | Perl_croak(aTHX_ "Usage: CODE(0x%"UVxf")(%s)", PTR2UV(cv), params); |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | XS(XS_UNIVERSAL_isa) |
| 325 | { |
| 326 | dVAR; |
| 327 | dXSARGS; |
| 328 | |
| 329 | if (items != 2) |
| 330 | croak_xs_usage(cv, "reference, kind"); |
| 331 | else { |
| 332 | SV * const sv = ST(0); |
| 333 | |
| 334 | SvGETMAGIC(sv); |
| 335 | |
| 336 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) |
| 337 | XSRETURN_UNDEF; |
| 338 | |
| 339 | ST(0) = boolSV(sv_derived_from_sv(sv, ST(1), 0)); |
| 340 | XSRETURN(1); |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | XS(XS_UNIVERSAL_can) |
| 345 | { |
| 346 | dVAR; |
| 347 | dXSARGS; |
| 348 | SV *sv; |
| 349 | SV *rv; |
| 350 | HV *pkg = NULL; |
| 351 | |
| 352 | if (items != 2) |
| 353 | croak_xs_usage(cv, "object-ref, method"); |
| 354 | |
| 355 | sv = ST(0); |
| 356 | |
| 357 | SvGETMAGIC(sv); |
| 358 | |
| 359 | if (!SvOK(sv) || !(SvROK(sv) || SvNIOK(sv) || (SvPOK(sv) && SvCUR(sv)) |
| 360 | )) |
| 361 | XSRETURN_UNDEF; |
| 362 | |
| 363 | rv = &PL_sv_undef; |
| 364 | |
| 365 | if (SvROK(sv)) { |
| 366 | sv = MUTABLE_SV(SvRV(sv)); |
| 367 | if (SvOBJECT(sv)) |
| 368 | pkg = SvSTASH(sv); |
| 369 | } |
| 370 | else { |
| 371 | pkg = gv_stashsv(sv, 0); |
| 372 | if (!pkg) |
| 373 | pkg = gv_stashpv("UNIVERSAL", 0); |
| 374 | } |
| 375 | |
| 376 | if (pkg) { |
| 377 | GV * const gv = gv_fetchmethod_sv_flags(pkg, ST(1), 0); |
| 378 | if (gv && isGV(gv)) |
| 379 | rv = sv_2mortal(newRV(MUTABLE_SV(GvCV(gv)))); |
| 380 | } |
| 381 | |
| 382 | ST(0) = rv; |
| 383 | XSRETURN(1); |
| 384 | } |
| 385 | |
| 386 | XS(XS_UNIVERSAL_DOES) |
| 387 | { |
| 388 | dVAR; |
| 389 | dXSARGS; |
| 390 | PERL_UNUSED_ARG(cv); |
| 391 | |
| 392 | if (items != 2) |
| 393 | Perl_croak(aTHX_ "Usage: invocant->DOES(kind)"); |
| 394 | else { |
| 395 | SV * const sv = ST(0); |
| 396 | if (sv_does_sv( sv, ST(1), 0 )) |
| 397 | XSRETURN_YES; |
| 398 | |
| 399 | XSRETURN_NO; |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | XS(XS_UNIVERSAL_VERSION) |
| 404 | { |
| 405 | dVAR; |
| 406 | dXSARGS; |
| 407 | HV *pkg; |
| 408 | GV **gvp; |
| 409 | GV *gv; |
| 410 | SV *sv; |
| 411 | const char *undef; |
| 412 | PERL_UNUSED_ARG(cv); |
| 413 | |
| 414 | if (SvROK(ST(0))) { |
| 415 | sv = MUTABLE_SV(SvRV(ST(0))); |
| 416 | if (!SvOBJECT(sv)) |
| 417 | Perl_croak(aTHX_ "Cannot find version of an unblessed reference"); |
| 418 | pkg = SvSTASH(sv); |
| 419 | } |
| 420 | else { |
| 421 | pkg = gv_stashsv(ST(0), 0); |
| 422 | } |
| 423 | |
| 424 | gvp = pkg ? (GV**)hv_fetchs(pkg, "VERSION", FALSE) : NULL; |
| 425 | |
| 426 | if (gvp && isGV(gv = *gvp) && (sv = GvSV(gv)) && SvOK(sv)) { |
| 427 | SV * const nsv = sv_newmortal(); |
| 428 | sv_setsv(nsv, sv); |
| 429 | sv = nsv; |
| 430 | if ( !sv_isobject(sv) || !sv_derived_from(sv, "version")) |
| 431 | upg_version(sv, FALSE); |
| 432 | |
| 433 | undef = NULL; |
| 434 | } |
| 435 | else { |
| 436 | sv = &PL_sv_undef; |
| 437 | undef = "(undef)"; |
| 438 | } |
| 439 | |
| 440 | if (items > 1) { |
| 441 | SV *req = ST(1); |
| 442 | |
| 443 | if (undef) { |
| 444 | if (pkg) { |
| 445 | const HEK * const name = HvNAME_HEK(pkg); |
| 446 | Perl_croak(aTHX_ |
| 447 | "%"HEKf" does not define $%"HEKf |
| 448 | "::VERSION--version check failed", |
| 449 | HEKfARG(name), HEKfARG(name)); |
| 450 | } else { |
| 451 | Perl_croak(aTHX_ |
| 452 | "%"SVf" defines neither package nor VERSION--version check failed", |
| 453 | SVfARG(ST(0)) ); |
| 454 | } |
| 455 | } |
| 456 | |
| 457 | if ( !sv_isobject(req) || !sv_derived_from(req, "version")) { |
| 458 | /* req may very well be R/O, so create a new object */ |
| 459 | req = sv_2mortal( new_version(req) ); |
| 460 | } |
| 461 | |
| 462 | if ( vcmp( req, sv ) > 0 ) { |
| 463 | if ( hv_exists(MUTABLE_HV(SvRV(req)), "qv", 2 ) ) { |
| 464 | Perl_croak(aTHX_ "%"HEKf" version %"SVf" required--" |
| 465 | "this is only version %"SVf"", |
| 466 | HEKfARG(HvNAME_HEK(pkg)), |
| 467 | SVfARG(sv_2mortal(vnormal(req))), |
| 468 | SVfARG(sv_2mortal(vnormal(sv)))); |
| 469 | } else { |
| 470 | Perl_croak(aTHX_ "%"HEKf" version %"SVf" required--" |
| 471 | "this is only version %"SVf, |
| 472 | HEKfARG(HvNAME_HEK(pkg)), |
| 473 | SVfARG(sv_2mortal(vstringify(req))), |
| 474 | SVfARG(sv_2mortal(vstringify(sv)))); |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | } |
| 479 | |
| 480 | if ( SvOK(sv) && sv_derived_from(sv, "version") ) { |
| 481 | ST(0) = sv_2mortal(vstringify(sv)); |
| 482 | } else { |
| 483 | ST(0) = sv; |
| 484 | } |
| 485 | |
| 486 | XSRETURN(1); |
| 487 | } |
| 488 | |
| 489 | XS(XS_version_new) |
| 490 | { |
| 491 | dVAR; |
| 492 | dXSARGS; |
| 493 | if (items > 3) |
| 494 | croak_xs_usage(cv, "class, version"); |
| 495 | SP -= items; |
| 496 | { |
| 497 | SV *vs = ST(1); |
| 498 | SV *rv; |
| 499 | STRLEN len; |
| 500 | const char *classname; |
| 501 | U32 flags; |
| 502 | if ( sv_isobject(ST(0)) ) { /* get the class if called as an object method */ |
| 503 | const HV * stash = SvSTASH(SvRV(ST(0))); |
| 504 | classname = HvNAME(stash); |
| 505 | len = HvNAMELEN(stash); |
| 506 | flags = HvNAMEUTF8(stash) ? SVf_UTF8 : 0; |
| 507 | } |
| 508 | else { |
| 509 | classname = SvPV(ST(0), len); |
| 510 | flags = SvUTF8(ST(0)); |
| 511 | } |
| 512 | |
| 513 | if ( items == 1 || ! SvOK(vs) ) { /* no param or explicit undef */ |
| 514 | /* create empty object */ |
| 515 | vs = sv_newmortal(); |
| 516 | sv_setpvs(vs, "0"); |
| 517 | } |
| 518 | else if ( items == 3 ) { |
| 519 | vs = sv_newmortal(); |
| 520 | Perl_sv_setpvf(aTHX_ vs,"v%s",SvPV_nolen_const(ST(2))); |
| 521 | } |
| 522 | |
| 523 | rv = new_version(vs); |
| 524 | if ( strnNE(classname,"version", len) ) /* inherited new() */ |
| 525 | sv_bless(rv, gv_stashpvn(classname, len, GV_ADD | flags)); |
| 526 | |
| 527 | mPUSHs(rv); |
| 528 | PUTBACK; |
| 529 | return; |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | XS(XS_version_stringify) |
| 534 | { |
| 535 | dVAR; |
| 536 | dXSARGS; |
| 537 | if (items < 1) |
| 538 | croak_xs_usage(cv, "lobj, ..."); |
| 539 | SP -= items; |
| 540 | { |
| 541 | SV * lobj = ST(0); |
| 542 | |
| 543 | if (sv_isobject(lobj) && sv_derived_from(lobj, "version")) { |
| 544 | lobj = SvRV(lobj); |
| 545 | } |
| 546 | else |
| 547 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 548 | |
| 549 | mPUSHs(vstringify(lobj)); |
| 550 | |
| 551 | PUTBACK; |
| 552 | return; |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | XS(XS_version_numify) |
| 557 | { |
| 558 | dVAR; |
| 559 | dXSARGS; |
| 560 | if (items < 1) |
| 561 | croak_xs_usage(cv, "lobj, ..."); |
| 562 | SP -= items; |
| 563 | { |
| 564 | SV * lobj = ST(0); |
| 565 | |
| 566 | if (sv_isobject(lobj) && sv_derived_from(lobj, "version")) { |
| 567 | lobj = SvRV(lobj); |
| 568 | } |
| 569 | else |
| 570 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 571 | |
| 572 | mPUSHs(vnumify(lobj)); |
| 573 | |
| 574 | PUTBACK; |
| 575 | return; |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | XS(XS_version_normal) |
| 580 | { |
| 581 | dVAR; |
| 582 | dXSARGS; |
| 583 | if (items < 1) |
| 584 | croak_xs_usage(cv, "lobj, ..."); |
| 585 | SP -= items; |
| 586 | { |
| 587 | SV * lobj = ST(0); |
| 588 | |
| 589 | if (sv_isobject(lobj) && sv_derived_from(lobj, "version")) { |
| 590 | lobj = SvRV(lobj); |
| 591 | } |
| 592 | else |
| 593 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 594 | |
| 595 | mPUSHs(vnormal(lobj)); |
| 596 | |
| 597 | PUTBACK; |
| 598 | return; |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | XS(XS_version_vcmp) |
| 603 | { |
| 604 | dVAR; |
| 605 | dXSARGS; |
| 606 | if (items < 1) |
| 607 | croak_xs_usage(cv, "lobj, ..."); |
| 608 | SP -= items; |
| 609 | { |
| 610 | SV * lobj = ST(0); |
| 611 | |
| 612 | if (sv_isobject(lobj) && sv_derived_from(lobj, "version")) { |
| 613 | lobj = SvRV(lobj); |
| 614 | } |
| 615 | else |
| 616 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 617 | |
| 618 | { |
| 619 | SV *rs; |
| 620 | SV *rvs; |
| 621 | SV * robj = ST(1); |
| 622 | const IV swap = (IV)SvIV(ST(2)); |
| 623 | |
| 624 | if ( !sv_isobject(robj) || !sv_derived_from(robj, "version") ) |
| 625 | { |
| 626 | robj = new_version(SvOK(robj) ? robj : newSVpvs_flags("0", SVs_TEMP)); |
| 627 | sv_2mortal(robj); |
| 628 | } |
| 629 | rvs = SvRV(robj); |
| 630 | |
| 631 | if ( swap ) |
| 632 | { |
| 633 | rs = newSViv(vcmp(rvs,lobj)); |
| 634 | } |
| 635 | else |
| 636 | { |
| 637 | rs = newSViv(vcmp(lobj,rvs)); |
| 638 | } |
| 639 | |
| 640 | mPUSHs(rs); |
| 641 | } |
| 642 | |
| 643 | PUTBACK; |
| 644 | return; |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | XS(XS_version_boolean) |
| 649 | { |
| 650 | dVAR; |
| 651 | dXSARGS; |
| 652 | if (items < 1) |
| 653 | croak_xs_usage(cv, "lobj, ..."); |
| 654 | SP -= items; |
| 655 | if (sv_isobject(ST(0)) && sv_derived_from(ST(0), "version")) { |
| 656 | SV * const lobj = SvRV(ST(0)); |
| 657 | SV * const rs = |
| 658 | newSViv( vcmp(lobj, |
| 659 | sv_2mortal(new_version( |
| 660 | sv_2mortal(newSVpvs("0")) |
| 661 | )) |
| 662 | ) |
| 663 | ); |
| 664 | mPUSHs(rs); |
| 665 | PUTBACK; |
| 666 | return; |
| 667 | } |
| 668 | else |
| 669 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 670 | } |
| 671 | |
| 672 | XS(XS_version_noop) |
| 673 | { |
| 674 | dVAR; |
| 675 | dXSARGS; |
| 676 | if (items < 1) |
| 677 | croak_xs_usage(cv, "lobj, ..."); |
| 678 | if (sv_isobject(ST(0)) && sv_derived_from(ST(0), "version")) |
| 679 | Perl_croak(aTHX_ "operation not supported with version object"); |
| 680 | else |
| 681 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 682 | #ifndef HASATTRIBUTE_NORETURN |
| 683 | XSRETURN_EMPTY; |
| 684 | #endif |
| 685 | } |
| 686 | |
| 687 | XS(XS_version_is_alpha) |
| 688 | { |
| 689 | dVAR; |
| 690 | dXSARGS; |
| 691 | if (items != 1) |
| 692 | croak_xs_usage(cv, "lobj"); |
| 693 | SP -= items; |
| 694 | if (sv_isobject(ST(0)) && sv_derived_from(ST(0), "version")) { |
| 695 | SV * const lobj = ST(0); |
| 696 | if ( hv_exists(MUTABLE_HV(SvRV(lobj)), "alpha", 5 ) ) |
| 697 | XSRETURN_YES; |
| 698 | else |
| 699 | XSRETURN_NO; |
| 700 | PUTBACK; |
| 701 | return; |
| 702 | } |
| 703 | else |
| 704 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 705 | } |
| 706 | |
| 707 | XS(XS_version_qv) |
| 708 | { |
| 709 | dVAR; |
| 710 | dXSARGS; |
| 711 | PERL_UNUSED_ARG(cv); |
| 712 | SP -= items; |
| 713 | { |
| 714 | SV * ver = ST(0); |
| 715 | SV * rv; |
| 716 | STRLEN len = 0; |
| 717 | const char * classname = ""; |
| 718 | U32 flags = 0; |
| 719 | if ( items == 2 && SvOK(ST(1)) ) { |
| 720 | ver = ST(1); |
| 721 | if ( sv_isobject(ST(0)) ) { /* class called as an object method */ |
| 722 | const HV * stash = SvSTASH(SvRV(ST(0))); |
| 723 | classname = HvNAME(stash); |
| 724 | len = HvNAMELEN(stash); |
| 725 | flags = HvNAMEUTF8(stash) ? SVf_UTF8 : 0; |
| 726 | } |
| 727 | else { |
| 728 | classname = SvPV(ST(0), len); |
| 729 | flags = SvUTF8(ST(0)); |
| 730 | } |
| 731 | } |
| 732 | if ( !SvVOK(ver) ) { /* not already a v-string */ |
| 733 | rv = sv_newmortal(); |
| 734 | sv_setsv(rv,ver); /* make a duplicate */ |
| 735 | upg_version(rv, TRUE); |
| 736 | } else { |
| 737 | rv = sv_2mortal(new_version(ver)); |
| 738 | } |
| 739 | if ( items == 2 |
| 740 | && strnNE(classname,"version", len) ) { /* inherited new() */ |
| 741 | sv_bless(rv, gv_stashpvn(classname, len, GV_ADD | flags)); |
| 742 | } |
| 743 | PUSHs(rv); |
| 744 | } |
| 745 | PUTBACK; |
| 746 | return; |
| 747 | } |
| 748 | |
| 749 | XS(XS_version_is_qv) |
| 750 | { |
| 751 | dVAR; |
| 752 | dXSARGS; |
| 753 | if (items != 1) |
| 754 | croak_xs_usage(cv, "lobj"); |
| 755 | SP -= items; |
| 756 | if (sv_isobject(ST(0)) && sv_derived_from(ST(0), "version")) { |
| 757 | SV * const lobj = ST(0); |
| 758 | if ( hv_exists(MUTABLE_HV(SvRV(lobj)), "qv", 2 ) ) |
| 759 | XSRETURN_YES; |
| 760 | else |
| 761 | XSRETURN_NO; |
| 762 | PUTBACK; |
| 763 | return; |
| 764 | } |
| 765 | else |
| 766 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 767 | } |
| 768 | |
| 769 | XS(XS_utf8_is_utf8) |
| 770 | { |
| 771 | dVAR; |
| 772 | dXSARGS; |
| 773 | if (items != 1) |
| 774 | croak_xs_usage(cv, "sv"); |
| 775 | else { |
| 776 | SV * const sv = ST(0); |
| 777 | SvGETMAGIC(sv); |
| 778 | if (SvUTF8(sv)) |
| 779 | XSRETURN_YES; |
| 780 | else |
| 781 | XSRETURN_NO; |
| 782 | } |
| 783 | XSRETURN_EMPTY; |
| 784 | } |
| 785 | |
| 786 | XS(XS_utf8_valid) |
| 787 | { |
| 788 | dVAR; |
| 789 | dXSARGS; |
| 790 | if (items != 1) |
| 791 | croak_xs_usage(cv, "sv"); |
| 792 | else { |
| 793 | SV * const sv = ST(0); |
| 794 | STRLEN len; |
| 795 | const char * const s = SvPV_const(sv,len); |
| 796 | if (!SvUTF8(sv) || is_utf8_string((const U8*)s,len)) |
| 797 | XSRETURN_YES; |
| 798 | else |
| 799 | XSRETURN_NO; |
| 800 | } |
| 801 | XSRETURN_EMPTY; |
| 802 | } |
| 803 | |
| 804 | XS(XS_utf8_encode) |
| 805 | { |
| 806 | dVAR; |
| 807 | dXSARGS; |
| 808 | if (items != 1) |
| 809 | croak_xs_usage(cv, "sv"); |
| 810 | sv_utf8_encode(ST(0)); |
| 811 | SvSETMAGIC(ST(0)); |
| 812 | XSRETURN_EMPTY; |
| 813 | } |
| 814 | |
| 815 | XS(XS_utf8_decode) |
| 816 | { |
| 817 | dVAR; |
| 818 | dXSARGS; |
| 819 | if (items != 1) |
| 820 | croak_xs_usage(cv, "sv"); |
| 821 | else { |
| 822 | SV * const sv = ST(0); |
| 823 | bool RETVAL; |
| 824 | SvPV_force_nolen(sv); |
| 825 | RETVAL = sv_utf8_decode(sv); |
| 826 | ST(0) = boolSV(RETVAL); |
| 827 | } |
| 828 | XSRETURN(1); |
| 829 | } |
| 830 | |
| 831 | XS(XS_utf8_upgrade) |
| 832 | { |
| 833 | dVAR; |
| 834 | dXSARGS; |
| 835 | if (items != 1) |
| 836 | croak_xs_usage(cv, "sv"); |
| 837 | else { |
| 838 | SV * const sv = ST(0); |
| 839 | STRLEN RETVAL; |
| 840 | dXSTARG; |
| 841 | |
| 842 | RETVAL = sv_utf8_upgrade(sv); |
| 843 | XSprePUSH; PUSHi((IV)RETVAL); |
| 844 | } |
| 845 | XSRETURN(1); |
| 846 | } |
| 847 | |
| 848 | XS(XS_utf8_downgrade) |
| 849 | { |
| 850 | dVAR; |
| 851 | dXSARGS; |
| 852 | if (items < 1 || items > 2) |
| 853 | croak_xs_usage(cv, "sv, failok=0"); |
| 854 | else { |
| 855 | SV * const sv = ST(0); |
| 856 | const bool failok = (items < 2) ? 0 : (int)SvIV(ST(1)); |
| 857 | const bool RETVAL = sv_utf8_downgrade(sv, failok); |
| 858 | |
| 859 | ST(0) = boolSV(RETVAL); |
| 860 | } |
| 861 | XSRETURN(1); |
| 862 | } |
| 863 | |
| 864 | XS(XS_utf8_native_to_unicode) |
| 865 | { |
| 866 | dVAR; |
| 867 | dXSARGS; |
| 868 | const UV uv = SvUV(ST(0)); |
| 869 | |
| 870 | if (items > 1) |
| 871 | croak_xs_usage(cv, "sv"); |
| 872 | |
| 873 | ST(0) = sv_2mortal(newSViv(NATIVE_TO_UNI(uv))); |
| 874 | XSRETURN(1); |
| 875 | } |
| 876 | |
| 877 | XS(XS_utf8_unicode_to_native) |
| 878 | { |
| 879 | dVAR; |
| 880 | dXSARGS; |
| 881 | const UV uv = SvUV(ST(0)); |
| 882 | |
| 883 | if (items > 1) |
| 884 | croak_xs_usage(cv, "sv"); |
| 885 | |
| 886 | ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv))); |
| 887 | XSRETURN(1); |
| 888 | } |
| 889 | |
| 890 | XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */ |
| 891 | { |
| 892 | dVAR; |
| 893 | dXSARGS; |
| 894 | SV * const svz = ST(0); |
| 895 | SV * sv; |
| 896 | PERL_UNUSED_ARG(cv); |
| 897 | |
| 898 | /* [perl #77776] - called as &foo() not foo() */ |
| 899 | if (!SvROK(svz)) |
| 900 | croak_xs_usage(cv, "SCALAR[, ON]"); |
| 901 | |
| 902 | sv = SvRV(svz); |
| 903 | |
| 904 | if (items == 1) { |
| 905 | if (SvREADONLY(sv) && !SvIsCOW(sv)) |
| 906 | XSRETURN_YES; |
| 907 | else |
| 908 | XSRETURN_NO; |
| 909 | } |
| 910 | else if (items == 2) { |
| 911 | if (SvTRUE(ST(1))) { |
| 912 | if (SvIsCOW(sv)) sv_force_normal(sv); |
| 913 | SvREADONLY_on(sv); |
| 914 | XSRETURN_YES; |
| 915 | } |
| 916 | else { |
| 917 | /* I hope you really know what you are doing. */ |
| 918 | if (!SvIsCOW(sv)) SvREADONLY_off(sv); |
| 919 | XSRETURN_NO; |
| 920 | } |
| 921 | } |
| 922 | XSRETURN_UNDEF; /* Can't happen. */ |
| 923 | } |
| 924 | |
| 925 | XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */ |
| 926 | { |
| 927 | dVAR; |
| 928 | dXSARGS; |
| 929 | SV * const svz = ST(0); |
| 930 | SV * sv; |
| 931 | PERL_UNUSED_ARG(cv); |
| 932 | |
| 933 | /* [perl #77776] - called as &foo() not foo() */ |
| 934 | if (!SvROK(svz)) |
| 935 | croak_xs_usage(cv, "SCALAR[, REFCOUNT]"); |
| 936 | |
| 937 | sv = SvRV(svz); |
| 938 | |
| 939 | if (items == 1) |
| 940 | XSRETURN_UV(SvREFCNT(sv) - 1); /* Minus the ref created for us. */ |
| 941 | else if (items == 2) { |
| 942 | /* I hope you really know what you are doing. */ |
| 943 | SvREFCNT(sv) = SvUV(ST(1)) + 1; /* we free one ref on exit */ |
| 944 | XSRETURN_UV(SvREFCNT(sv) - 1); |
| 945 | } |
| 946 | XSRETURN_UNDEF; /* Can't happen. */ |
| 947 | } |
| 948 | |
| 949 | XS(XS_Internals_hv_clear_placehold) |
| 950 | { |
| 951 | dVAR; |
| 952 | dXSARGS; |
| 953 | |
| 954 | if (items != 1 || !SvROK(ST(0))) |
| 955 | croak_xs_usage(cv, "hv"); |
| 956 | else { |
| 957 | HV * const hv = MUTABLE_HV(SvRV(ST(0))); |
| 958 | hv_clear_placeholders(hv); |
| 959 | XSRETURN(0); |
| 960 | } |
| 961 | } |
| 962 | |
| 963 | XS(XS_PerlIO_get_layers) |
| 964 | { |
| 965 | dVAR; |
| 966 | dXSARGS; |
| 967 | if (items < 1 || items % 2 == 0) |
| 968 | croak_xs_usage(cv, "filehandle[,args]"); |
| 969 | #ifdef USE_PERLIO |
| 970 | { |
| 971 | SV * sv; |
| 972 | GV * gv; |
| 973 | IO * io; |
| 974 | bool input = TRUE; |
| 975 | bool details = FALSE; |
| 976 | |
| 977 | if (items > 1) { |
| 978 | SV * const *svp; |
| 979 | for (svp = MARK + 2; svp <= SP; svp += 2) { |
| 980 | SV * const * const varp = svp; |
| 981 | SV * const * const valp = svp + 1; |
| 982 | STRLEN klen; |
| 983 | const char * const key = SvPV_const(*varp, klen); |
| 984 | |
| 985 | switch (*key) { |
| 986 | case 'i': |
| 987 | if (klen == 5 && memEQ(key, "input", 5)) { |
| 988 | input = SvTRUE(*valp); |
| 989 | break; |
| 990 | } |
| 991 | goto fail; |
| 992 | case 'o': |
| 993 | if (klen == 6 && memEQ(key, "output", 6)) { |
| 994 | input = !SvTRUE(*valp); |
| 995 | break; |
| 996 | } |
| 997 | goto fail; |
| 998 | case 'd': |
| 999 | if (klen == 7 && memEQ(key, "details", 7)) { |
| 1000 | details = SvTRUE(*valp); |
| 1001 | break; |
| 1002 | } |
| 1003 | goto fail; |
| 1004 | default: |
| 1005 | fail: |
| 1006 | Perl_croak(aTHX_ |
| 1007 | "get_layers: unknown argument '%s'", |
| 1008 | key); |
| 1009 | } |
| 1010 | } |
| 1011 | |
| 1012 | SP -= (items - 1); |
| 1013 | } |
| 1014 | |
| 1015 | sv = POPs; |
| 1016 | gv = MAYBE_DEREF_GV(sv); |
| 1017 | |
| 1018 | if (!gv && !SvROK(sv)) |
| 1019 | gv = gv_fetchsv_nomg(sv, 0, SVt_PVIO); |
| 1020 | |
| 1021 | if (gv && (io = GvIO(gv))) { |
| 1022 | AV* const av = PerlIO_get_layers(aTHX_ input ? |
| 1023 | IoIFP(io) : IoOFP(io)); |
| 1024 | I32 i; |
| 1025 | const I32 last = av_len(av); |
| 1026 | I32 nitem = 0; |
| 1027 | |
| 1028 | for (i = last; i >= 0; i -= 3) { |
| 1029 | SV * const * const namsvp = av_fetch(av, i - 2, FALSE); |
| 1030 | SV * const * const argsvp = av_fetch(av, i - 1, FALSE); |
| 1031 | SV * const * const flgsvp = av_fetch(av, i, FALSE); |
| 1032 | |
| 1033 | const bool namok = namsvp && *namsvp && SvPOK(*namsvp); |
| 1034 | const bool argok = argsvp && *argsvp && SvPOK(*argsvp); |
| 1035 | const bool flgok = flgsvp && *flgsvp && SvIOK(*flgsvp); |
| 1036 | |
| 1037 | if (details) { |
| 1038 | /* Indents of 5? Yuck. */ |
| 1039 | /* We know that PerlIO_get_layers creates a new SV for |
| 1040 | the name and flags, so we can just take a reference |
| 1041 | and "steal" it when we free the AV below. */ |
| 1042 | XPUSHs(namok |
| 1043 | ? sv_2mortal(SvREFCNT_inc_simple_NN(*namsvp)) |
| 1044 | : &PL_sv_undef); |
| 1045 | XPUSHs(argok |
| 1046 | ? newSVpvn_flags(SvPVX_const(*argsvp), |
| 1047 | SvCUR(*argsvp), |
| 1048 | (SvUTF8(*argsvp) ? SVf_UTF8 : 0) |
| 1049 | | SVs_TEMP) |
| 1050 | : &PL_sv_undef); |
| 1051 | XPUSHs(flgok |
| 1052 | ? sv_2mortal(SvREFCNT_inc_simple_NN(*flgsvp)) |
| 1053 | : &PL_sv_undef); |
| 1054 | nitem += 3; |
| 1055 | } |
| 1056 | else { |
| 1057 | if (namok && argok) |
| 1058 | XPUSHs(sv_2mortal(Perl_newSVpvf(aTHX_ "%"SVf"(%"SVf")", |
| 1059 | SVfARG(*namsvp), |
| 1060 | SVfARG(*argsvp)))); |
| 1061 | else if (namok) |
| 1062 | XPUSHs(sv_2mortal(SvREFCNT_inc_simple_NN(*namsvp))); |
| 1063 | else |
| 1064 | XPUSHs(&PL_sv_undef); |
| 1065 | nitem++; |
| 1066 | if (flgok) { |
| 1067 | const IV flags = SvIVX(*flgsvp); |
| 1068 | |
| 1069 | if (flags & PERLIO_F_UTF8) { |
| 1070 | XPUSHs(newSVpvs_flags("utf8", SVs_TEMP)); |
| 1071 | nitem++; |
| 1072 | } |
| 1073 | } |
| 1074 | } |
| 1075 | } |
| 1076 | |
| 1077 | SvREFCNT_dec(av); |
| 1078 | |
| 1079 | XSRETURN(nitem); |
| 1080 | } |
| 1081 | } |
| 1082 | #endif |
| 1083 | |
| 1084 | XSRETURN(0); |
| 1085 | } |
| 1086 | |
| 1087 | XS(XS_Internals_hash_seed) |
| 1088 | { |
| 1089 | dVAR; |
| 1090 | /* Using dXSARGS would also have dITEM and dSP, |
| 1091 | * which define 2 unused local variables. */ |
| 1092 | dAXMARK; |
| 1093 | PERL_UNUSED_ARG(cv); |
| 1094 | PERL_UNUSED_VAR(mark); |
| 1095 | XSRETURN_UV(PERL_HASH_SEED); |
| 1096 | } |
| 1097 | |
| 1098 | XS(XS_Internals_rehash_seed) |
| 1099 | { |
| 1100 | dVAR; |
| 1101 | /* Using dXSARGS would also have dITEM and dSP, |
| 1102 | * which define 2 unused local variables. */ |
| 1103 | dAXMARK; |
| 1104 | PERL_UNUSED_ARG(cv); |
| 1105 | PERL_UNUSED_VAR(mark); |
| 1106 | XSRETURN_UV(PL_rehash_seed); |
| 1107 | } |
| 1108 | |
| 1109 | XS(XS_Internals_HvREHASH) /* Subject to change */ |
| 1110 | { |
| 1111 | dVAR; |
| 1112 | dXSARGS; |
| 1113 | PERL_UNUSED_ARG(cv); |
| 1114 | if (SvROK(ST(0))) { |
| 1115 | const HV * const hv = (const HV *) SvRV(ST(0)); |
| 1116 | if (items == 1 && SvTYPE(hv) == SVt_PVHV) { |
| 1117 | if (HvREHASH(hv)) |
| 1118 | XSRETURN_YES; |
| 1119 | else |
| 1120 | XSRETURN_NO; |
| 1121 | } |
| 1122 | } |
| 1123 | Perl_croak(aTHX_ "Internals::HvREHASH $hashref"); |
| 1124 | } |
| 1125 | |
| 1126 | XS(XS_re_is_regexp) |
| 1127 | { |
| 1128 | dVAR; |
| 1129 | dXSARGS; |
| 1130 | PERL_UNUSED_VAR(cv); |
| 1131 | |
| 1132 | if (items != 1) |
| 1133 | croak_xs_usage(cv, "sv"); |
| 1134 | |
| 1135 | if (SvRXOK(ST(0))) { |
| 1136 | XSRETURN_YES; |
| 1137 | } else { |
| 1138 | XSRETURN_NO; |
| 1139 | } |
| 1140 | } |
| 1141 | |
| 1142 | XS(XS_re_regnames_count) |
| 1143 | { |
| 1144 | REGEXP *rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL; |
| 1145 | SV * ret; |
| 1146 | dVAR; |
| 1147 | dXSARGS; |
| 1148 | |
| 1149 | if (items != 0) |
| 1150 | croak_xs_usage(cv, ""); |
| 1151 | |
| 1152 | SP -= items; |
| 1153 | PUTBACK; |
| 1154 | |
| 1155 | if (!rx) |
| 1156 | XSRETURN_UNDEF; |
| 1157 | |
| 1158 | ret = CALLREG_NAMED_BUFF_COUNT(rx); |
| 1159 | |
| 1160 | SPAGAIN; |
| 1161 | PUSHs(ret ? sv_2mortal(ret) : &PL_sv_undef); |
| 1162 | XSRETURN(1); |
| 1163 | } |
| 1164 | |
| 1165 | XS(XS_re_regname) |
| 1166 | { |
| 1167 | dVAR; |
| 1168 | dXSARGS; |
| 1169 | REGEXP * rx; |
| 1170 | U32 flags; |
| 1171 | SV * ret; |
| 1172 | |
| 1173 | if (items < 1 || items > 2) |
| 1174 | croak_xs_usage(cv, "name[, all ]"); |
| 1175 | |
| 1176 | SP -= items; |
| 1177 | PUTBACK; |
| 1178 | |
| 1179 | rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL; |
| 1180 | |
| 1181 | if (!rx) |
| 1182 | XSRETURN_UNDEF; |
| 1183 | |
| 1184 | if (items == 2 && SvTRUE(ST(1))) { |
| 1185 | flags = RXapif_ALL; |
| 1186 | } else { |
| 1187 | flags = RXapif_ONE; |
| 1188 | } |
| 1189 | ret = CALLREG_NAMED_BUFF_FETCH(rx, ST(0), (flags | RXapif_REGNAME)); |
| 1190 | |
| 1191 | SPAGAIN; |
| 1192 | PUSHs(ret ? sv_2mortal(ret) : &PL_sv_undef); |
| 1193 | XSRETURN(1); |
| 1194 | } |
| 1195 | |
| 1196 | |
| 1197 | XS(XS_re_regnames) |
| 1198 | { |
| 1199 | dVAR; |
| 1200 | dXSARGS; |
| 1201 | REGEXP * rx; |
| 1202 | U32 flags; |
| 1203 | SV *ret; |
| 1204 | AV *av; |
| 1205 | I32 length; |
| 1206 | I32 i; |
| 1207 | SV **entry; |
| 1208 | |
| 1209 | if (items > 1) |
| 1210 | croak_xs_usage(cv, "[all]"); |
| 1211 | |
| 1212 | rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL; |
| 1213 | |
| 1214 | if (!rx) |
| 1215 | XSRETURN_UNDEF; |
| 1216 | |
| 1217 | if (items == 1 && SvTRUE(ST(0))) { |
| 1218 | flags = RXapif_ALL; |
| 1219 | } else { |
| 1220 | flags = RXapif_ONE; |
| 1221 | } |
| 1222 | |
| 1223 | SP -= items; |
| 1224 | PUTBACK; |
| 1225 | |
| 1226 | ret = CALLREG_NAMED_BUFF_ALL(rx, (flags | RXapif_REGNAMES)); |
| 1227 | |
| 1228 | SPAGAIN; |
| 1229 | |
| 1230 | if (!ret) |
| 1231 | XSRETURN_UNDEF; |
| 1232 | |
| 1233 | av = MUTABLE_AV(SvRV(ret)); |
| 1234 | length = av_len(av); |
| 1235 | |
| 1236 | for (i = 0; i <= length; i++) { |
| 1237 | entry = av_fetch(av, i, FALSE); |
| 1238 | |
| 1239 | if (!entry) |
| 1240 | Perl_croak(aTHX_ "NULL array element in re::regnames()"); |
| 1241 | |
| 1242 | mXPUSHs(SvREFCNT_inc_simple_NN(*entry)); |
| 1243 | } |
| 1244 | |
| 1245 | SvREFCNT_dec(ret); |
| 1246 | |
| 1247 | PUTBACK; |
| 1248 | return; |
| 1249 | } |
| 1250 | |
| 1251 | XS(XS_re_regexp_pattern) |
| 1252 | { |
| 1253 | dVAR; |
| 1254 | dXSARGS; |
| 1255 | REGEXP *re; |
| 1256 | |
| 1257 | if (items != 1) |
| 1258 | croak_xs_usage(cv, "sv"); |
| 1259 | |
| 1260 | SP -= items; |
| 1261 | |
| 1262 | /* |
| 1263 | Checks if a reference is a regex or not. If the parameter is |
| 1264 | not a ref, or is not the result of a qr// then returns false |
| 1265 | in scalar context and an empty list in list context. |
| 1266 | Otherwise in list context it returns the pattern and the |
| 1267 | modifiers, in scalar context it returns the pattern just as it |
| 1268 | would if the qr// was stringified normally, regardless as |
| 1269 | to the class of the variable and any stringification overloads |
| 1270 | on the object. |
| 1271 | */ |
| 1272 | |
| 1273 | if ((re = SvRX(ST(0)))) /* assign deliberate */ |
| 1274 | { |
| 1275 | /* Houston, we have a regex! */ |
| 1276 | SV *pattern; |
| 1277 | |
| 1278 | if ( GIMME_V == G_ARRAY ) { |
| 1279 | STRLEN left = 0; |
| 1280 | char reflags[sizeof(INT_PAT_MODS) + MAX_CHARSET_NAME_LENGTH]; |
| 1281 | const char *fptr; |
| 1282 | char ch; |
| 1283 | U16 match_flags; |
| 1284 | |
| 1285 | /* |
| 1286 | we are in list context so stringify |
| 1287 | the modifiers that apply. We ignore "negative |
| 1288 | modifiers" in this scenario, and the default character set |
| 1289 | */ |
| 1290 | |
| 1291 | if (get_regex_charset(RX_EXTFLAGS(re)) != REGEX_DEPENDS_CHARSET) { |
| 1292 | STRLEN len; |
| 1293 | const char* const name = get_regex_charset_name(RX_EXTFLAGS(re), |
| 1294 | &len); |
| 1295 | Copy(name, reflags + left, len, char); |
| 1296 | left += len; |
| 1297 | } |
| 1298 | fptr = INT_PAT_MODS; |
| 1299 | match_flags = (U16)((RX_EXTFLAGS(re) & RXf_PMf_COMPILETIME) |
| 1300 | >> RXf_PMf_STD_PMMOD_SHIFT); |
| 1301 | |
| 1302 | while((ch = *fptr++)) { |
| 1303 | if(match_flags & 1) { |
| 1304 | reflags[left++] = ch; |
| 1305 | } |
| 1306 | match_flags >>= 1; |
| 1307 | } |
| 1308 | |
| 1309 | pattern = newSVpvn_flags(RX_PRECOMP(re),RX_PRELEN(re), |
| 1310 | (RX_UTF8(re) ? SVf_UTF8 : 0) | SVs_TEMP); |
| 1311 | |
| 1312 | /* return the pattern and the modifiers */ |
| 1313 | XPUSHs(pattern); |
| 1314 | XPUSHs(newSVpvn_flags(reflags, left, SVs_TEMP)); |
| 1315 | XSRETURN(2); |
| 1316 | } else { |
| 1317 | /* Scalar, so use the string that Perl would return */ |
| 1318 | /* return the pattern in (?msix:..) format */ |
| 1319 | #if PERL_VERSION >= 11 |
| 1320 | pattern = sv_2mortal(newSVsv(MUTABLE_SV(re))); |
| 1321 | #else |
| 1322 | pattern = newSVpvn_flags(RX_WRAPPED(re), RX_WRAPLEN(re), |
| 1323 | (RX_UTF8(re) ? SVf_UTF8 : 0) | SVs_TEMP); |
| 1324 | #endif |
| 1325 | XPUSHs(pattern); |
| 1326 | XSRETURN(1); |
| 1327 | } |
| 1328 | } else { |
| 1329 | /* It ain't a regexp folks */ |
| 1330 | if ( GIMME_V == G_ARRAY ) { |
| 1331 | /* return the empty list */ |
| 1332 | XSRETURN_UNDEF; |
| 1333 | } else { |
| 1334 | /* Because of the (?:..) wrapping involved in a |
| 1335 | stringified pattern it is impossible to get a |
| 1336 | result for a real regexp that would evaluate to |
| 1337 | false. Therefore we can return PL_sv_no to signify |
| 1338 | that the object is not a regex, this means that one |
| 1339 | can say |
| 1340 | |
| 1341 | if (regex($might_be_a_regex) eq '(?:foo)') { } |
| 1342 | |
| 1343 | and not worry about undefined values. |
| 1344 | */ |
| 1345 | XSRETURN_NO; |
| 1346 | } |
| 1347 | } |
| 1348 | /* NOT-REACHED */ |
| 1349 | } |
| 1350 | |
| 1351 | struct xsub_details { |
| 1352 | const char *name; |
| 1353 | XSUBADDR_t xsub; |
| 1354 | const char *proto; |
| 1355 | }; |
| 1356 | |
| 1357 | struct xsub_details details[] = { |
| 1358 | {"UNIVERSAL::isa", XS_UNIVERSAL_isa, NULL}, |
| 1359 | {"UNIVERSAL::can", XS_UNIVERSAL_can, NULL}, |
| 1360 | {"UNIVERSAL::DOES", XS_UNIVERSAL_DOES, NULL}, |
| 1361 | {"UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, NULL}, |
| 1362 | {"version::()", XS_version_noop, NULL}, |
| 1363 | {"version::new", XS_version_new, NULL}, |
| 1364 | {"version::parse", XS_version_new, NULL}, |
| 1365 | {"version::(\"\"", XS_version_stringify, NULL}, |
| 1366 | {"version::stringify", XS_version_stringify, NULL}, |
| 1367 | {"version::(0+", XS_version_numify, NULL}, |
| 1368 | {"version::numify", XS_version_numify, NULL}, |
| 1369 | {"version::normal", XS_version_normal, NULL}, |
| 1370 | {"version::(cmp", XS_version_vcmp, NULL}, |
| 1371 | {"version::(<=>", XS_version_vcmp, NULL}, |
| 1372 | {"version::vcmp", XS_version_vcmp, NULL}, |
| 1373 | {"version::(bool", XS_version_boolean, NULL}, |
| 1374 | {"version::boolean", XS_version_boolean, NULL}, |
| 1375 | {"version::(+", XS_version_noop, NULL}, |
| 1376 | {"version::(-", XS_version_noop, NULL}, |
| 1377 | {"version::(*", XS_version_noop, NULL}, |
| 1378 | {"version::(/", XS_version_noop, NULL}, |
| 1379 | {"version::(+=", XS_version_noop, NULL}, |
| 1380 | {"version::(-=", XS_version_noop, NULL}, |
| 1381 | {"version::(*=", XS_version_noop, NULL}, |
| 1382 | {"version::(/=", XS_version_noop, NULL}, |
| 1383 | {"version::(abs", XS_version_noop, NULL}, |
| 1384 | {"version::(nomethod", XS_version_noop, NULL}, |
| 1385 | {"version::noop", XS_version_noop, NULL}, |
| 1386 | {"version::is_alpha", XS_version_is_alpha, NULL}, |
| 1387 | {"version::qv", XS_version_qv, NULL}, |
| 1388 | {"version::declare", XS_version_qv, NULL}, |
| 1389 | {"version::is_qv", XS_version_is_qv, NULL}, |
| 1390 | {"utf8::is_utf8", XS_utf8_is_utf8, NULL}, |
| 1391 | {"utf8::valid", XS_utf8_valid, NULL}, |
| 1392 | {"utf8::encode", XS_utf8_encode, NULL}, |
| 1393 | {"utf8::decode", XS_utf8_decode, NULL}, |
| 1394 | {"utf8::upgrade", XS_utf8_upgrade, NULL}, |
| 1395 | {"utf8::downgrade", XS_utf8_downgrade, NULL}, |
| 1396 | {"utf8::native_to_unicode", XS_utf8_native_to_unicode, NULL}, |
| 1397 | {"utf8::unicode_to_native", XS_utf8_unicode_to_native, NULL}, |
| 1398 | {"Internals::SvREADONLY", XS_Internals_SvREADONLY, "\\[$%@];$"}, |
| 1399 | {"Internals::SvREFCNT", XS_Internals_SvREFCNT, "\\[$%@];$"}, |
| 1400 | {"Internals::hv_clear_placeholders", XS_Internals_hv_clear_placehold, "\\%"}, |
| 1401 | {"PerlIO::get_layers", XS_PerlIO_get_layers, "*;@"}, |
| 1402 | {"Internals::hash_seed", XS_Internals_hash_seed, ""}, |
| 1403 | {"Internals::rehash_seed", XS_Internals_rehash_seed, ""}, |
| 1404 | {"Internals::HvREHASH", XS_Internals_HvREHASH, "\\%"}, |
| 1405 | {"re::is_regexp", XS_re_is_regexp, "$"}, |
| 1406 | {"re::regname", XS_re_regname, ";$$"}, |
| 1407 | {"re::regnames", XS_re_regnames, ";$"}, |
| 1408 | {"re::regnames_count", XS_re_regnames_count, ""}, |
| 1409 | {"re::regexp_pattern", XS_re_regexp_pattern, "$"}, |
| 1410 | }; |
| 1411 | |
| 1412 | void |
| 1413 | Perl_boot_core_UNIVERSAL(pTHX) |
| 1414 | { |
| 1415 | dVAR; |
| 1416 | static const char file[] = __FILE__; |
| 1417 | struct xsub_details *xsub = details; |
| 1418 | const struct xsub_details *end |
| 1419 | = details + sizeof(details) / sizeof(details[0]); |
| 1420 | |
| 1421 | do { |
| 1422 | newXS_flags(xsub->name, xsub->xsub, file, xsub->proto, 0); |
| 1423 | } while (++xsub < end); |
| 1424 | |
| 1425 | /* Providing a Regexp::DESTROY fixes #21347. See test in t/op/ref.t */ |
| 1426 | { |
| 1427 | CV * const cv = |
| 1428 | newCONSTSUB(get_hv("Regexp::", GV_ADD), "DESTROY", NULL); |
| 1429 | Safefree(CvFILE(cv)); |
| 1430 | CvFILE(cv) = (char *)file; |
| 1431 | CvDYNFILE_off(cv); |
| 1432 | } |
| 1433 | } |
| 1434 | |
| 1435 | /* |
| 1436 | * Local variables: |
| 1437 | * c-indentation-style: bsd |
| 1438 | * c-basic-offset: 4 |
| 1439 | * indent-tabs-mode: nil |
| 1440 | * End: |
| 1441 | * |
| 1442 | * ex: set ts=8 sts=4 sw=4 et: |
| 1443 | */ |