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