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