| 1 | /* universal.c |
| 2 | * |
| 3 | * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
| 4 | * 2005, 2006, 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 story |
| 15 | */ |
| 16 | |
| 17 | /* This file contains the code that implements the functions in Perl's |
| 18 | * UNIVERSAL package, such as UNIVERSAL->can(). |
| 19 | */ |
| 20 | |
| 21 | #include "EXTERN.h" |
| 22 | #define PERL_IN_UNIVERSAL_C |
| 23 | #include "perl.h" |
| 24 | |
| 25 | #ifdef USE_PERLIO |
| 26 | #include "perliol.h" /* For the PERLIO_F_XXX */ |
| 27 | #endif |
| 28 | |
| 29 | /* |
| 30 | * Contributed by Graham Barr <Graham.Barr@tiuk.ti.com> |
| 31 | * The main guts of traverse_isa was actually copied from gv_fetchmeth |
| 32 | */ |
| 33 | |
| 34 | STATIC SV * |
| 35 | S_isa_lookup(pTHX_ HV *stash, const char *name, HV* name_stash, |
| 36 | int len, int level) |
| 37 | { |
| 38 | dVAR; |
| 39 | AV* av; |
| 40 | GV* gv; |
| 41 | GV** gvp; |
| 42 | HV* hv = NULL; |
| 43 | SV* subgen = NULL; |
| 44 | const char *hvname; |
| 45 | |
| 46 | /* A stash/class can go by many names (ie. User == main::User), so |
| 47 | we compare the stash itself just in case */ |
| 48 | if (name_stash && (stash == name_stash)) |
| 49 | return &PL_sv_yes; |
| 50 | |
| 51 | hvname = HvNAME_get(stash); |
| 52 | |
| 53 | if (strEQ(hvname, name)) |
| 54 | return &PL_sv_yes; |
| 55 | |
| 56 | if (strEQ(name, "UNIVERSAL")) |
| 57 | return &PL_sv_yes; |
| 58 | |
| 59 | if (level > 100) |
| 60 | Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", |
| 61 | hvname); |
| 62 | |
| 63 | gvp = (GV**)hv_fetchs(stash, "::ISA::CACHE::", FALSE); |
| 64 | |
| 65 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (subgen = GvSV(gv)) |
| 66 | && (hv = GvHV(gv))) |
| 67 | { |
| 68 | if (SvIV(subgen) == (IV)PL_sub_generation) { |
| 69 | SV* sv; |
| 70 | SV** const svp = (SV**)hv_fetch(hv, name, len, FALSE); |
| 71 | if (svp && (sv = *svp) != (SV*)&PL_sv_undef) { |
| 72 | DEBUG_o( Perl_deb(aTHX_ "Using cached ISA %s for package %s\n", |
| 73 | name, hvname) ); |
| 74 | return sv; |
| 75 | } |
| 76 | } |
| 77 | else { |
| 78 | DEBUG_o( Perl_deb(aTHX_ "ISA Cache in package %s is stale\n", |
| 79 | hvname) ); |
| 80 | hv_clear(hv); |
| 81 | sv_setiv(subgen, PL_sub_generation); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | gvp = (GV**)hv_fetchs(stash, "ISA", FALSE); |
| 86 | |
| 87 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
| 88 | if (!hv || !subgen) { |
| 89 | gvp = (GV**)hv_fetchs(stash, "::ISA::CACHE::", TRUE); |
| 90 | |
| 91 | gv = *gvp; |
| 92 | |
| 93 | if (SvTYPE(gv) != SVt_PVGV) |
| 94 | gv_init(gv, stash, "::ISA::CACHE::", 14, TRUE); |
| 95 | |
| 96 | if (!hv) |
| 97 | hv = GvHVn(gv); |
| 98 | if (!subgen) { |
| 99 | subgen = newSViv(PL_sub_generation); |
| 100 | GvSV(gv) = subgen; |
| 101 | } |
| 102 | } |
| 103 | if (hv) { |
| 104 | SV** svp = AvARRAY(av); |
| 105 | /* NOTE: No support for tied ISA */ |
| 106 | I32 items = AvFILLp(av) + 1; |
| 107 | while (items--) { |
| 108 | SV* const sv = *svp++; |
| 109 | HV* const basestash = gv_stashsv(sv, FALSE); |
| 110 | if (!basestash) { |
| 111 | if (ckWARN(WARN_MISC)) |
| 112 | Perl_warner(aTHX_ packWARN(WARN_SYNTAX), |
| 113 | "Can't locate package %"SVf" for @%s::ISA", |
| 114 | sv, hvname); |
| 115 | continue; |
| 116 | } |
| 117 | if (&PL_sv_yes == isa_lookup(basestash, name, name_stash, |
| 118 | len, level + 1)) { |
| 119 | (void)hv_store(hv,name,len,&PL_sv_yes,0); |
| 120 | return &PL_sv_yes; |
| 121 | } |
| 122 | } |
| 123 | (void)hv_store(hv,name,len,&PL_sv_no,0); |
| 124 | } |
| 125 | } |
| 126 | return &PL_sv_no; |
| 127 | } |
| 128 | |
| 129 | /* |
| 130 | =head1 SV Manipulation Functions |
| 131 | |
| 132 | =for apidoc sv_derived_from |
| 133 | |
| 134 | Returns a boolean indicating whether the SV is derived from the specified |
| 135 | class. This is the function that implements C<UNIVERSAL::isa>. It works |
| 136 | for class names as well as for objects. |
| 137 | |
| 138 | =cut |
| 139 | */ |
| 140 | |
| 141 | bool |
| 142 | Perl_sv_derived_from(pTHX_ SV *sv, const char *name) |
| 143 | { |
| 144 | dVAR; |
| 145 | HV *stash; |
| 146 | |
| 147 | SvGETMAGIC(sv); |
| 148 | |
| 149 | if (SvROK(sv)) { |
| 150 | const char *type; |
| 151 | sv = SvRV(sv); |
| 152 | type = sv_reftype(sv,0); |
| 153 | if (type && strEQ(type,name)) |
| 154 | return TRUE; |
| 155 | stash = SvOBJECT(sv) ? SvSTASH(sv) : NULL; |
| 156 | } |
| 157 | else { |
| 158 | stash = gv_stashsv(sv, FALSE); |
| 159 | } |
| 160 | |
| 161 | if (stash) { |
| 162 | HV * const name_stash = gv_stashpv(name, FALSE); |
| 163 | return isa_lookup(stash, name, name_stash, strlen(name), 0) == &PL_sv_yes; |
| 164 | } |
| 165 | else |
| 166 | return FALSE; |
| 167 | |
| 168 | } |
| 169 | |
| 170 | #include "XSUB.h" |
| 171 | |
| 172 | PERL_XS_EXPORT_C void XS_UNIVERSAL_isa(pTHX_ CV *cv); |
| 173 | PERL_XS_EXPORT_C void XS_UNIVERSAL_can(pTHX_ CV *cv); |
| 174 | PERL_XS_EXPORT_C void XS_UNIVERSAL_VERSION(pTHX_ CV *cv); |
| 175 | XS(XS_version_new); |
| 176 | XS(XS_version_stringify); |
| 177 | XS(XS_version_numify); |
| 178 | XS(XS_version_normal); |
| 179 | XS(XS_version_vcmp); |
| 180 | XS(XS_version_boolean); |
| 181 | #ifdef HASATTRIBUTE_NORETURN |
| 182 | XS(XS_version_noop) __attribute__noreturn__; |
| 183 | #else |
| 184 | XS(XS_version_noop); |
| 185 | #endif |
| 186 | XS(XS_version_is_alpha); |
| 187 | XS(XS_version_qv); |
| 188 | XS(XS_utf8_is_utf8); |
| 189 | XS(XS_utf8_valid); |
| 190 | XS(XS_utf8_encode); |
| 191 | XS(XS_utf8_decode); |
| 192 | XS(XS_utf8_upgrade); |
| 193 | XS(XS_utf8_downgrade); |
| 194 | XS(XS_utf8_unicode_to_native); |
| 195 | XS(XS_utf8_native_to_unicode); |
| 196 | XS(XS_Internals_SvREADONLY); |
| 197 | XS(XS_Internals_SvREFCNT); |
| 198 | XS(XS_Internals_hv_clear_placehold); |
| 199 | XS(XS_PerlIO_get_layers); |
| 200 | XS(XS_Regexp_DESTROY); |
| 201 | XS(XS_Internals_hash_seed); |
| 202 | XS(XS_Internals_rehash_seed); |
| 203 | XS(XS_Internals_HvREHASH); |
| 204 | XS(XS_Internals_inc_sub_generation); |
| 205 | |
| 206 | void |
| 207 | Perl_boot_core_UNIVERSAL(pTHX) |
| 208 | { |
| 209 | dVAR; |
| 210 | static const char file[] = __FILE__; |
| 211 | |
| 212 | newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file); |
| 213 | newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file); |
| 214 | newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file); |
| 215 | { |
| 216 | /* register the overloading (type 'A') magic */ |
| 217 | PL_amagic_generation++; |
| 218 | /* Make it findable via fetchmethod */ |
| 219 | newXS("version::()", XS_version_noop, file); |
| 220 | newXS("version::new", XS_version_new, file); |
| 221 | newXS("version::(\"\"", XS_version_stringify, file); |
| 222 | newXS("version::stringify", XS_version_stringify, file); |
| 223 | newXS("version::(0+", XS_version_numify, file); |
| 224 | newXS("version::numify", XS_version_numify, file); |
| 225 | newXS("version::normal", XS_version_normal, file); |
| 226 | newXS("version::(cmp", XS_version_vcmp, file); |
| 227 | newXS("version::(<=>", XS_version_vcmp, file); |
| 228 | newXS("version::vcmp", XS_version_vcmp, file); |
| 229 | newXS("version::(bool", XS_version_boolean, file); |
| 230 | newXS("version::boolean", XS_version_boolean, file); |
| 231 | newXS("version::(nomethod", XS_version_noop, file); |
| 232 | newXS("version::noop", XS_version_noop, file); |
| 233 | newXS("version::is_alpha", XS_version_is_alpha, file); |
| 234 | newXS("version::qv", XS_version_qv, file); |
| 235 | } |
| 236 | newXS("utf8::is_utf8", XS_utf8_is_utf8, file); |
| 237 | newXS("utf8::valid", XS_utf8_valid, file); |
| 238 | newXS("utf8::encode", XS_utf8_encode, file); |
| 239 | newXS("utf8::decode", XS_utf8_decode, file); |
| 240 | newXS("utf8::upgrade", XS_utf8_upgrade, file); |
| 241 | newXS("utf8::downgrade", XS_utf8_downgrade, file); |
| 242 | newXS("utf8::native_to_unicode", XS_utf8_native_to_unicode, file); |
| 243 | newXS("utf8::unicode_to_native", XS_utf8_unicode_to_native, file); |
| 244 | newXSproto("Internals::SvREADONLY",XS_Internals_SvREADONLY, file, "\\[$%@];$"); |
| 245 | newXSproto("Internals::SvREFCNT",XS_Internals_SvREFCNT, file, "\\[$%@];$"); |
| 246 | newXSproto("Internals::hv_clear_placeholders", |
| 247 | XS_Internals_hv_clear_placehold, file, "\\%"); |
| 248 | newXSproto("PerlIO::get_layers", |
| 249 | XS_PerlIO_get_layers, file, "*;@"); |
| 250 | newXS("Regexp::DESTROY", XS_Regexp_DESTROY, file); |
| 251 | newXSproto("Internals::hash_seed",XS_Internals_hash_seed, file, ""); |
| 252 | newXSproto("Internals::rehash_seed",XS_Internals_rehash_seed, file, ""); |
| 253 | newXSproto("Internals::HvREHASH", XS_Internals_HvREHASH, file, "\\%"); |
| 254 | newXSproto("Internals::inc_sub_generation",XS_Internals_inc_sub_generation, |
| 255 | file, ""); |
| 256 | } |
| 257 | |
| 258 | |
| 259 | XS(XS_UNIVERSAL_isa) |
| 260 | { |
| 261 | dVAR; |
| 262 | dXSARGS; |
| 263 | |
| 264 | if (items != 2) |
| 265 | Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)"); |
| 266 | else { |
| 267 | SV * const sv = ST(0); |
| 268 | const char *name; |
| 269 | |
| 270 | SvGETMAGIC(sv); |
| 271 | |
| 272 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) |
| 273 | || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) |
| 274 | XSRETURN_UNDEF; |
| 275 | |
| 276 | name = SvPV_nolen_const(ST(1)); |
| 277 | |
| 278 | ST(0) = boolSV(sv_derived_from(sv, name)); |
| 279 | XSRETURN(1); |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | XS(XS_UNIVERSAL_can) |
| 284 | { |
| 285 | dVAR; |
| 286 | dXSARGS; |
| 287 | SV *sv; |
| 288 | const char *name; |
| 289 | SV *rv; |
| 290 | HV *pkg = NULL; |
| 291 | |
| 292 | if (items != 2) |
| 293 | Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)"); |
| 294 | |
| 295 | sv = ST(0); |
| 296 | |
| 297 | SvGETMAGIC(sv); |
| 298 | |
| 299 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) |
| 300 | || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) |
| 301 | XSRETURN_UNDEF; |
| 302 | |
| 303 | name = SvPV_nolen_const(ST(1)); |
| 304 | rv = &PL_sv_undef; |
| 305 | |
| 306 | if (SvROK(sv)) { |
| 307 | sv = (SV*)SvRV(sv); |
| 308 | if (SvOBJECT(sv)) |
| 309 | pkg = SvSTASH(sv); |
| 310 | } |
| 311 | else { |
| 312 | pkg = gv_stashsv(sv, FALSE); |
| 313 | } |
| 314 | |
| 315 | if (pkg) { |
| 316 | GV * const gv = gv_fetchmethod_autoload(pkg, name, FALSE); |
| 317 | if (gv && isGV(gv)) |
| 318 | rv = sv_2mortal(newRV((SV*)GvCV(gv))); |
| 319 | } |
| 320 | |
| 321 | ST(0) = rv; |
| 322 | XSRETURN(1); |
| 323 | } |
| 324 | |
| 325 | XS(XS_UNIVERSAL_VERSION) |
| 326 | { |
| 327 | dVAR; |
| 328 | dXSARGS; |
| 329 | HV *pkg; |
| 330 | GV **gvp; |
| 331 | GV *gv; |
| 332 | SV *sv; |
| 333 | const char *undef; |
| 334 | |
| 335 | if (SvROK(ST(0))) { |
| 336 | sv = (SV*)SvRV(ST(0)); |
| 337 | if (!SvOBJECT(sv)) |
| 338 | Perl_croak(aTHX_ "Cannot find version of an unblessed reference"); |
| 339 | pkg = SvSTASH(sv); |
| 340 | } |
| 341 | else { |
| 342 | pkg = gv_stashsv(ST(0), FALSE); |
| 343 | } |
| 344 | |
| 345 | gvp = pkg ? (GV**)hv_fetchs(pkg, "VERSION", FALSE) : NULL; |
| 346 | |
| 347 | if (gvp && isGV(gv = *gvp) && (sv = GvSV(gv)) && SvOK(sv)) { |
| 348 | SV * const nsv = sv_newmortal(); |
| 349 | sv_setsv(nsv, sv); |
| 350 | sv = nsv; |
| 351 | if ( !sv_derived_from(sv, "version")) |
| 352 | upg_version(sv); |
| 353 | undef = NULL; |
| 354 | } |
| 355 | else { |
| 356 | sv = (SV*)&PL_sv_undef; |
| 357 | undef = "(undef)"; |
| 358 | } |
| 359 | |
| 360 | if (items > 1) { |
| 361 | SV *req = ST(1); |
| 362 | |
| 363 | if (undef) { |
| 364 | if (pkg) { |
| 365 | const char * const name = HvNAME_get(pkg); |
| 366 | Perl_croak(aTHX_ |
| 367 | "%s does not define $%s::VERSION--version check failed", |
| 368 | name, name); |
| 369 | } else { |
| 370 | Perl_croak(aTHX_ |
| 371 | "%s defines neither package nor VERSION--version check failed", |
| 372 | SvPVx_nolen_const(ST(0)) ); |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | if ( !sv_derived_from(req, "version")) { |
| 377 | /* req may very well be R/O, so create a new object */ |
| 378 | SV * const nsv = sv_newmortal(); |
| 379 | sv_setsv(nsv, req); |
| 380 | req = nsv; |
| 381 | upg_version(req); |
| 382 | } |
| 383 | |
| 384 | if ( vcmp( req, sv ) > 0 ) |
| 385 | Perl_croak(aTHX_ "%s version %"SVf" (%"SVf") required--" |
| 386 | "this is only version %"SVf" (%"SVf")", HvNAME_get(pkg), |
| 387 | vnumify(req),vnormal(req),vnumify(sv),vnormal(sv)); |
| 388 | } |
| 389 | |
| 390 | if ( SvOK(sv) && sv_derived_from(sv, "version") ) { |
| 391 | ST(0) = vnumify(sv); |
| 392 | } else { |
| 393 | ST(0) = sv; |
| 394 | } |
| 395 | |
| 396 | XSRETURN(1); |
| 397 | } |
| 398 | |
| 399 | XS(XS_version_new) |
| 400 | { |
| 401 | dVAR; |
| 402 | dXSARGS; |
| 403 | if (items > 3) |
| 404 | Perl_croak(aTHX_ "Usage: version::new(class, version)"); |
| 405 | SP -= items; |
| 406 | { |
| 407 | SV *vs = ST(1); |
| 408 | SV *rv; |
| 409 | const char * const classname = |
| 410 | sv_isobject(ST(0)) /* get the class if called as an object method */ |
| 411 | ? HvNAME(SvSTASH(SvRV(ST(0)))) |
| 412 | : (char *)SvPV_nolen(ST(0)); |
| 413 | |
| 414 | if ( items == 1 ) { |
| 415 | /* no parameter provided */ |
| 416 | if ( sv_isobject(ST(0)) ) { |
| 417 | /* copy existing object */ |
| 418 | vs = ST(0); |
| 419 | } |
| 420 | else { |
| 421 | /* create empty object */ |
| 422 | vs = sv_newmortal(); |
| 423 | sv_setpvn(vs,"",0); |
| 424 | } |
| 425 | } |
| 426 | else if ( items == 3 ) { |
| 427 | vs = sv_newmortal(); |
| 428 | Perl_sv_setpvf(aTHX_ vs,"v%s",SvPV_nolen_const(ST(2))); |
| 429 | } |
| 430 | |
| 431 | rv = new_version(vs); |
| 432 | if ( strcmp(classname,"version") != 0 ) /* inherited new() */ |
| 433 | sv_bless(rv, gv_stashpv(classname,TRUE)); |
| 434 | |
| 435 | PUSHs(sv_2mortal(rv)); |
| 436 | PUTBACK; |
| 437 | return; |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | XS(XS_version_stringify) |
| 442 | { |
| 443 | dVAR; |
| 444 | dXSARGS; |
| 445 | if (items < 1) |
| 446 | Perl_croak(aTHX_ "Usage: version::stringify(lobj, ...)"); |
| 447 | SP -= items; |
| 448 | { |
| 449 | SV * lobj; |
| 450 | |
| 451 | if (sv_derived_from(ST(0), "version")) { |
| 452 | lobj = SvRV(ST(0)); |
| 453 | } |
| 454 | else |
| 455 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 456 | |
| 457 | PUSHs(sv_2mortal(vstringify(lobj))); |
| 458 | |
| 459 | PUTBACK; |
| 460 | return; |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | XS(XS_version_numify) |
| 465 | { |
| 466 | dVAR; |
| 467 | dXSARGS; |
| 468 | if (items < 1) |
| 469 | Perl_croak(aTHX_ "Usage: version::numify(lobj, ...)"); |
| 470 | SP -= items; |
| 471 | { |
| 472 | SV * lobj; |
| 473 | |
| 474 | if (sv_derived_from(ST(0), "version")) { |
| 475 | lobj = SvRV(ST(0)); |
| 476 | } |
| 477 | else |
| 478 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 479 | |
| 480 | PUSHs(sv_2mortal(vnumify(lobj))); |
| 481 | |
| 482 | PUTBACK; |
| 483 | return; |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | XS(XS_version_normal) |
| 488 | { |
| 489 | dVAR; |
| 490 | dXSARGS; |
| 491 | if (items < 1) |
| 492 | Perl_croak(aTHX_ "Usage: version::normal(lobj, ...)"); |
| 493 | SP -= items; |
| 494 | { |
| 495 | SV * lobj; |
| 496 | |
| 497 | if (sv_derived_from(ST(0), "version")) { |
| 498 | lobj = SvRV(ST(0)); |
| 499 | } |
| 500 | else |
| 501 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 502 | |
| 503 | PUSHs(sv_2mortal(vnormal(lobj))); |
| 504 | |
| 505 | PUTBACK; |
| 506 | return; |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | XS(XS_version_vcmp) |
| 511 | { |
| 512 | dVAR; |
| 513 | dXSARGS; |
| 514 | if (items < 1) |
| 515 | Perl_croak(aTHX_ "Usage: version::vcmp(lobj, ...)"); |
| 516 | SP -= items; |
| 517 | { |
| 518 | SV * lobj; |
| 519 | |
| 520 | if (sv_derived_from(ST(0), "version")) { |
| 521 | lobj = SvRV(ST(0)); |
| 522 | } |
| 523 | else |
| 524 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 525 | |
| 526 | { |
| 527 | SV *rs; |
| 528 | SV *rvs; |
| 529 | SV * robj = ST(1); |
| 530 | const IV swap = (IV)SvIV(ST(2)); |
| 531 | |
| 532 | if ( ! sv_derived_from(robj, "version") ) |
| 533 | { |
| 534 | robj = new_version(robj); |
| 535 | } |
| 536 | rvs = SvRV(robj); |
| 537 | |
| 538 | if ( swap ) |
| 539 | { |
| 540 | rs = newSViv(vcmp(rvs,lobj)); |
| 541 | } |
| 542 | else |
| 543 | { |
| 544 | rs = newSViv(vcmp(lobj,rvs)); |
| 545 | } |
| 546 | |
| 547 | PUSHs(sv_2mortal(rs)); |
| 548 | } |
| 549 | |
| 550 | PUTBACK; |
| 551 | return; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | XS(XS_version_boolean) |
| 556 | { |
| 557 | dVAR; |
| 558 | dXSARGS; |
| 559 | if (items < 1) |
| 560 | Perl_croak(aTHX_ "Usage: version::boolean(lobj, ...)"); |
| 561 | SP -= items; |
| 562 | if (sv_derived_from(ST(0), "version")) { |
| 563 | SV * const lobj = SvRV(ST(0)); |
| 564 | SV * const rs = newSViv( vcmp(lobj,new_version(newSVpvs("0"))) ); |
| 565 | PUSHs(sv_2mortal(rs)); |
| 566 | PUTBACK; |
| 567 | return; |
| 568 | } |
| 569 | else |
| 570 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 571 | } |
| 572 | |
| 573 | XS(XS_version_noop) |
| 574 | { |
| 575 | dVAR; |
| 576 | dXSARGS; |
| 577 | if (items < 1) |
| 578 | Perl_croak(aTHX_ "Usage: version::noop(lobj, ...)"); |
| 579 | if (sv_derived_from(ST(0), "version")) |
| 580 | Perl_croak(aTHX_ "operation not supported with version object"); |
| 581 | else |
| 582 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 583 | #ifndef HASATTRIBUTE_NORETURN |
| 584 | XSRETURN_EMPTY; |
| 585 | #endif |
| 586 | } |
| 587 | |
| 588 | XS(XS_version_is_alpha) |
| 589 | { |
| 590 | dVAR; |
| 591 | dXSARGS; |
| 592 | if (items != 1) |
| 593 | Perl_croak(aTHX_ "Usage: version::is_alpha(lobj)"); |
| 594 | SP -= items; |
| 595 | if (sv_derived_from(ST(0), "version")) { |
| 596 | SV * const lobj = ST(0); |
| 597 | if ( hv_exists((HV*)SvRV(lobj), "alpha", 5 ) ) |
| 598 | XSRETURN_YES; |
| 599 | else |
| 600 | XSRETURN_NO; |
| 601 | PUTBACK; |
| 602 | return; |
| 603 | } |
| 604 | else |
| 605 | Perl_croak(aTHX_ "lobj is not of type version"); |
| 606 | } |
| 607 | |
| 608 | XS(XS_version_qv) |
| 609 | { |
| 610 | dVAR; |
| 611 | dXSARGS; |
| 612 | if (items != 1) |
| 613 | Perl_croak(aTHX_ "Usage: version::qv(ver)"); |
| 614 | SP -= items; |
| 615 | { |
| 616 | SV * ver = ST(0); |
| 617 | if ( !SvVOK(ver) ) { /* only need to do with if not already v-string */ |
| 618 | SV * const vs = sv_newmortal(); |
| 619 | char *version; |
| 620 | if ( SvNOK(ver) ) /* may get too much accuracy */ |
| 621 | { |
| 622 | char tbuf[64]; |
| 623 | const STRLEN len = my_sprintf(tbuf,"%.9"NVgf, SvNVX(ver)); |
| 624 | version = savepvn(tbuf, len); |
| 625 | } |
| 626 | else |
| 627 | { |
| 628 | version = savesvpv(ver); |
| 629 | } |
| 630 | (void)scan_version(version,vs,TRUE); |
| 631 | Safefree(version); |
| 632 | |
| 633 | PUSHs(vs); |
| 634 | } |
| 635 | else |
| 636 | { |
| 637 | PUSHs(sv_2mortal(new_version(ver))); |
| 638 | } |
| 639 | |
| 640 | PUTBACK; |
| 641 | return; |
| 642 | } |
| 643 | } |
| 644 | |
| 645 | XS(XS_utf8_is_utf8) |
| 646 | { |
| 647 | dVAR; |
| 648 | dXSARGS; |
| 649 | if (items != 1) |
| 650 | Perl_croak(aTHX_ "Usage: utf8::is_utf8(sv)"); |
| 651 | else { |
| 652 | const SV * const sv = ST(0); |
| 653 | if (SvUTF8(sv)) |
| 654 | XSRETURN_YES; |
| 655 | else |
| 656 | XSRETURN_NO; |
| 657 | } |
| 658 | XSRETURN_EMPTY; |
| 659 | } |
| 660 | |
| 661 | XS(XS_utf8_valid) |
| 662 | { |
| 663 | dVAR; |
| 664 | dXSARGS; |
| 665 | if (items != 1) |
| 666 | Perl_croak(aTHX_ "Usage: utf8::valid(sv)"); |
| 667 | else { |
| 668 | SV * const sv = ST(0); |
| 669 | STRLEN len; |
| 670 | const char * const s = SvPV_const(sv,len); |
| 671 | if (!SvUTF8(sv) || is_utf8_string((const U8*)s,len)) |
| 672 | XSRETURN_YES; |
| 673 | else |
| 674 | XSRETURN_NO; |
| 675 | } |
| 676 | XSRETURN_EMPTY; |
| 677 | } |
| 678 | |
| 679 | XS(XS_utf8_encode) |
| 680 | { |
| 681 | dVAR; |
| 682 | dXSARGS; |
| 683 | if (items != 1) |
| 684 | Perl_croak(aTHX_ "Usage: utf8::encode(sv)"); |
| 685 | sv_utf8_encode(ST(0)); |
| 686 | XSRETURN_EMPTY; |
| 687 | } |
| 688 | |
| 689 | XS(XS_utf8_decode) |
| 690 | { |
| 691 | dVAR; |
| 692 | dXSARGS; |
| 693 | if (items != 1) |
| 694 | Perl_croak(aTHX_ "Usage: utf8::decode(sv)"); |
| 695 | else { |
| 696 | SV * const sv = ST(0); |
| 697 | const bool RETVAL = sv_utf8_decode(sv); |
| 698 | ST(0) = boolSV(RETVAL); |
| 699 | sv_2mortal(ST(0)); |
| 700 | } |
| 701 | XSRETURN(1); |
| 702 | } |
| 703 | |
| 704 | XS(XS_utf8_upgrade) |
| 705 | { |
| 706 | dVAR; |
| 707 | dXSARGS; |
| 708 | if (items != 1) |
| 709 | Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)"); |
| 710 | else { |
| 711 | SV * const sv = ST(0); |
| 712 | STRLEN RETVAL; |
| 713 | dXSTARG; |
| 714 | |
| 715 | RETVAL = sv_utf8_upgrade(sv); |
| 716 | XSprePUSH; PUSHi((IV)RETVAL); |
| 717 | } |
| 718 | XSRETURN(1); |
| 719 | } |
| 720 | |
| 721 | XS(XS_utf8_downgrade) |
| 722 | { |
| 723 | dVAR; |
| 724 | dXSARGS; |
| 725 | if (items < 1 || items > 2) |
| 726 | Perl_croak(aTHX_ "Usage: utf8::downgrade(sv, failok=0)"); |
| 727 | else { |
| 728 | SV * const sv = ST(0); |
| 729 | const bool failok = (items < 2) ? 0 : (int)SvIV(ST(1)); |
| 730 | const bool RETVAL = sv_utf8_downgrade(sv, failok); |
| 731 | |
| 732 | ST(0) = boolSV(RETVAL); |
| 733 | sv_2mortal(ST(0)); |
| 734 | } |
| 735 | XSRETURN(1); |
| 736 | } |
| 737 | |
| 738 | XS(XS_utf8_native_to_unicode) |
| 739 | { |
| 740 | dVAR; |
| 741 | dXSARGS; |
| 742 | const UV uv = SvUV(ST(0)); |
| 743 | |
| 744 | if (items > 1) |
| 745 | Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)"); |
| 746 | |
| 747 | ST(0) = sv_2mortal(newSViv(NATIVE_TO_UNI(uv))); |
| 748 | XSRETURN(1); |
| 749 | } |
| 750 | |
| 751 | XS(XS_utf8_unicode_to_native) |
| 752 | { |
| 753 | dVAR; |
| 754 | dXSARGS; |
| 755 | const UV uv = SvUV(ST(0)); |
| 756 | |
| 757 | if (items > 1) |
| 758 | Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)"); |
| 759 | |
| 760 | ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv))); |
| 761 | XSRETURN(1); |
| 762 | } |
| 763 | |
| 764 | XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */ |
| 765 | { |
| 766 | dVAR; |
| 767 | dXSARGS; |
| 768 | SV * const sv = SvRV(ST(0)); |
| 769 | |
| 770 | if (items == 1) { |
| 771 | if (SvREADONLY(sv)) |
| 772 | XSRETURN_YES; |
| 773 | else |
| 774 | XSRETURN_NO; |
| 775 | } |
| 776 | else if (items == 2) { |
| 777 | if (SvTRUE(ST(1))) { |
| 778 | SvREADONLY_on(sv); |
| 779 | XSRETURN_YES; |
| 780 | } |
| 781 | else { |
| 782 | /* I hope you really know what you are doing. */ |
| 783 | SvREADONLY_off(sv); |
| 784 | XSRETURN_NO; |
| 785 | } |
| 786 | } |
| 787 | XSRETURN_UNDEF; /* Can't happen. */ |
| 788 | } |
| 789 | |
| 790 | XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */ |
| 791 | { |
| 792 | dVAR; |
| 793 | dXSARGS; |
| 794 | SV * const sv = SvRV(ST(0)); |
| 795 | |
| 796 | if (items == 1) |
| 797 | XSRETURN_IV(SvREFCNT(sv) - 1); /* Minus the ref created for us. */ |
| 798 | else if (items == 2) { |
| 799 | /* I hope you really know what you are doing. */ |
| 800 | SvREFCNT(sv) = SvIV(ST(1)); |
| 801 | XSRETURN_IV(SvREFCNT(sv)); |
| 802 | } |
| 803 | XSRETURN_UNDEF; /* Can't happen. */ |
| 804 | } |
| 805 | |
| 806 | XS(XS_Internals_hv_clear_placehold) |
| 807 | { |
| 808 | dVAR; |
| 809 | dXSARGS; |
| 810 | |
| 811 | if (items != 1) |
| 812 | Perl_croak(aTHX_ "Usage: UNIVERSAL::hv_clear_placeholders(hv)"); |
| 813 | else { |
| 814 | HV * const hv = (HV *) SvRV(ST(0)); |
| 815 | hv_clear_placeholders(hv); |
| 816 | XSRETURN(0); |
| 817 | } |
| 818 | } |
| 819 | |
| 820 | XS(XS_Regexp_DESTROY) |
| 821 | { |
| 822 | PERL_UNUSED_CONTEXT; |
| 823 | PERL_UNUSED_ARG(cv); |
| 824 | } |
| 825 | |
| 826 | XS(XS_PerlIO_get_layers) |
| 827 | { |
| 828 | dVAR; |
| 829 | dXSARGS; |
| 830 | if (items < 1 || items % 2 == 0) |
| 831 | Perl_croak(aTHX_ "Usage: PerlIO_get_layers(filehandle[,args])"); |
| 832 | #ifdef USE_PERLIO |
| 833 | { |
| 834 | SV * sv; |
| 835 | GV * gv; |
| 836 | IO * io; |
| 837 | bool input = TRUE; |
| 838 | bool details = FALSE; |
| 839 | |
| 840 | if (items > 1) { |
| 841 | SV * const *svp; |
| 842 | for (svp = MARK + 2; svp <= SP; svp += 2) { |
| 843 | SV * const * const varp = svp; |
| 844 | SV * const * const valp = svp + 1; |
| 845 | STRLEN klen; |
| 846 | const char * const key = SvPV_const(*varp, klen); |
| 847 | |
| 848 | switch (*key) { |
| 849 | case 'i': |
| 850 | if (klen == 5 && memEQ(key, "input", 5)) { |
| 851 | input = SvTRUE(*valp); |
| 852 | break; |
| 853 | } |
| 854 | goto fail; |
| 855 | case 'o': |
| 856 | if (klen == 6 && memEQ(key, "output", 6)) { |
| 857 | input = !SvTRUE(*valp); |
| 858 | break; |
| 859 | } |
| 860 | goto fail; |
| 861 | case 'd': |
| 862 | if (klen == 7 && memEQ(key, "details", 7)) { |
| 863 | details = SvTRUE(*valp); |
| 864 | break; |
| 865 | } |
| 866 | goto fail; |
| 867 | default: |
| 868 | fail: |
| 869 | Perl_croak(aTHX_ |
| 870 | "get_layers: unknown argument '%s'", |
| 871 | key); |
| 872 | } |
| 873 | } |
| 874 | |
| 875 | SP -= (items - 1); |
| 876 | } |
| 877 | |
| 878 | sv = POPs; |
| 879 | gv = (GV*)sv; |
| 880 | |
| 881 | if (!isGV(sv)) { |
| 882 | if (SvROK(sv) && isGV(SvRV(sv))) |
| 883 | gv = (GV*)SvRV(sv); |
| 884 | else if (SvPOKp(sv)) |
| 885 | gv = gv_fetchsv(sv, 0, SVt_PVIO); |
| 886 | } |
| 887 | |
| 888 | if (gv && (io = GvIO(gv))) { |
| 889 | dTARGET; |
| 890 | AV* const av = PerlIO_get_layers(aTHX_ input ? |
| 891 | IoIFP(io) : IoOFP(io)); |
| 892 | I32 i; |
| 893 | const I32 last = av_len(av); |
| 894 | I32 nitem = 0; |
| 895 | |
| 896 | for (i = last; i >= 0; i -= 3) { |
| 897 | SV * const * const namsvp = av_fetch(av, i - 2, FALSE); |
| 898 | SV * const * const argsvp = av_fetch(av, i - 1, FALSE); |
| 899 | SV * const * const flgsvp = av_fetch(av, i, FALSE); |
| 900 | |
| 901 | const bool namok = namsvp && *namsvp && SvPOK(*namsvp); |
| 902 | const bool argok = argsvp && *argsvp && SvPOK(*argsvp); |
| 903 | const bool flgok = flgsvp && *flgsvp && SvIOK(*flgsvp); |
| 904 | |
| 905 | if (details) { |
| 906 | XPUSHs(namok |
| 907 | ? newSVpvn(SvPVX_const(*namsvp), SvCUR(*namsvp)) |
| 908 | : &PL_sv_undef); |
| 909 | XPUSHs(argok |
| 910 | ? newSVpvn(SvPVX_const(*argsvp), SvCUR(*argsvp)) |
| 911 | : &PL_sv_undef); |
| 912 | if (flgok) |
| 913 | XPUSHi(SvIVX(*flgsvp)); |
| 914 | else |
| 915 | XPUSHs(&PL_sv_undef); |
| 916 | nitem += 3; |
| 917 | } |
| 918 | else { |
| 919 | if (namok && argok) |
| 920 | XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf"(%"SVf")", |
| 921 | *namsvp, *argsvp)); |
| 922 | else if (namok) |
| 923 | XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf, *namsvp)); |
| 924 | else |
| 925 | XPUSHs(&PL_sv_undef); |
| 926 | nitem++; |
| 927 | if (flgok) { |
| 928 | const IV flags = SvIVX(*flgsvp); |
| 929 | |
| 930 | if (flags & PERLIO_F_UTF8) { |
| 931 | XPUSHs(newSVpvs("utf8")); |
| 932 | nitem++; |
| 933 | } |
| 934 | } |
| 935 | } |
| 936 | } |
| 937 | |
| 938 | SvREFCNT_dec(av); |
| 939 | |
| 940 | XSRETURN(nitem); |
| 941 | } |
| 942 | } |
| 943 | #endif |
| 944 | |
| 945 | XSRETURN(0); |
| 946 | } |
| 947 | |
| 948 | XS(XS_Internals_hash_seed) |
| 949 | { |
| 950 | dVAR; |
| 951 | /* Using dXSARGS would also have dITEM and dSP, |
| 952 | * which define 2 unused local variables. */ |
| 953 | dAXMARK; |
| 954 | PERL_UNUSED_ARG(cv); |
| 955 | PERL_UNUSED_VAR(mark); |
| 956 | XSRETURN_UV(PERL_HASH_SEED); |
| 957 | } |
| 958 | |
| 959 | XS(XS_Internals_rehash_seed) |
| 960 | { |
| 961 | dVAR; |
| 962 | /* Using dXSARGS would also have dITEM and dSP, |
| 963 | * which define 2 unused local variables. */ |
| 964 | dAXMARK; |
| 965 | PERL_UNUSED_ARG(cv); |
| 966 | PERL_UNUSED_VAR(mark); |
| 967 | XSRETURN_UV(PL_rehash_seed); |
| 968 | } |
| 969 | |
| 970 | XS(XS_Internals_HvREHASH) /* Subject to change */ |
| 971 | { |
| 972 | dVAR; |
| 973 | dXSARGS; |
| 974 | if (SvROK(ST(0))) { |
| 975 | const HV * const hv = (HV *) SvRV(ST(0)); |
| 976 | if (items == 1 && SvTYPE(hv) == SVt_PVHV) { |
| 977 | if (HvREHASH(hv)) |
| 978 | XSRETURN_YES; |
| 979 | else |
| 980 | XSRETURN_NO; |
| 981 | } |
| 982 | } |
| 983 | Perl_croak(aTHX_ "Internals::HvREHASH $hashref"); |
| 984 | } |
| 985 | |
| 986 | XS(XS_Internals_inc_sub_generation) |
| 987 | { |
| 988 | dVAR; |
| 989 | /* Using dXSARGS would also have dITEM and dSP, |
| 990 | * which define 2 unused local variables. */ |
| 991 | dAXMARK; |
| 992 | PERL_UNUSED_ARG(cv); |
| 993 | PERL_UNUSED_VAR(mark); |
| 994 | ++PL_sub_generation; |
| 995 | XSRETURN_EMPTY; |
| 996 | } |
| 997 | |
| 998 | /* |
| 999 | * Local variables: |
| 1000 | * c-indentation-style: bsd |
| 1001 | * c-basic-offset: 4 |
| 1002 | * indent-tabs-mode: t |
| 1003 | * End: |
| 1004 | * |
| 1005 | * ex: set ts=8 sts=4 sw=4 noet: |
| 1006 | */ |