| 1 | /* pp.c |
| 2 | * |
| 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 4 | * 2001, 2002, 2003, 2004, 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 | * 'It's a big house this, and very peculiar. Always a bit more |
| 13 | * to discover, and no knowing what you'll find round a corner. |
| 14 | * And Elves, sir!' --Samwise Gamgee |
| 15 | * |
| 16 | * [p.225 of _The Lord of the Rings_, II/i: "Many Meetings"] |
| 17 | */ |
| 18 | |
| 19 | /* This file contains general pp ("push/pop") functions that execute the |
| 20 | * opcodes that make up a perl program. A typical pp function expects to |
| 21 | * find its arguments on the stack, and usually pushes its results onto |
| 22 | * the stack, hence the 'pp' terminology. Each OP structure contains |
| 23 | * a pointer to the relevant pp_foo() function. |
| 24 | */ |
| 25 | |
| 26 | #include "EXTERN.h" |
| 27 | #define PERL_IN_PP_C |
| 28 | #include "perl.h" |
| 29 | #include "keywords.h" |
| 30 | |
| 31 | #include "reentr.h" |
| 32 | |
| 33 | /* XXX I can't imagine anyone who doesn't have this actually _needs_ |
| 34 | it, since pid_t is an integral type. |
| 35 | --AD 2/20/1998 |
| 36 | */ |
| 37 | #ifdef NEED_GETPID_PROTO |
| 38 | extern Pid_t getpid (void); |
| 39 | #endif |
| 40 | |
| 41 | /* |
| 42 | * Some BSDs and Cygwin default to POSIX math instead of IEEE. |
| 43 | * This switches them over to IEEE. |
| 44 | */ |
| 45 | #if defined(LIBM_LIB_VERSION) |
| 46 | _LIB_VERSION_TYPE _LIB_VERSION = _IEEE_; |
| 47 | #endif |
| 48 | |
| 49 | /* variations on pp_null */ |
| 50 | |
| 51 | PP(pp_stub) |
| 52 | { |
| 53 | dVAR; |
| 54 | dSP; |
| 55 | if (GIMME_V == G_SCALAR) |
| 56 | XPUSHs(&PL_sv_undef); |
| 57 | RETURN; |
| 58 | } |
| 59 | |
| 60 | /* Pushy stuff. */ |
| 61 | |
| 62 | PP(pp_padav) |
| 63 | { |
| 64 | dVAR; dSP; dTARGET; |
| 65 | I32 gimme; |
| 66 | assert(SvTYPE(TARG) == SVt_PVAV); |
| 67 | if (PL_op->op_private & OPpLVAL_INTRO) |
| 68 | if (!(PL_op->op_private & OPpPAD_STATE)) |
| 69 | SAVECLEARSV(PAD_SVl(PL_op->op_targ)); |
| 70 | EXTEND(SP, 1); |
| 71 | if (PL_op->op_flags & OPf_REF) { |
| 72 | PUSHs(TARG); |
| 73 | RETURN; |
| 74 | } else if (PL_op->op_private & OPpMAYBE_LVSUB) { |
| 75 | const I32 flags = is_lvalue_sub(); |
| 76 | if (flags && !(flags & OPpENTERSUB_INARGS)) { |
| 77 | if (GIMME == G_SCALAR) |
| 78 | /* diag_listed_as: Can't return %s to lvalue scalar context */ |
| 79 | Perl_croak(aTHX_ "Can't return array to lvalue scalar context"); |
| 80 | PUSHs(TARG); |
| 81 | RETURN; |
| 82 | } |
| 83 | } |
| 84 | gimme = GIMME_V; |
| 85 | if (gimme == G_ARRAY) { |
| 86 | const I32 maxarg = AvFILL(MUTABLE_AV(TARG)) + 1; |
| 87 | EXTEND(SP, maxarg); |
| 88 | if (SvMAGICAL(TARG)) { |
| 89 | U32 i; |
| 90 | for (i=0; i < (U32)maxarg; i++) { |
| 91 | SV * const * const svp = av_fetch(MUTABLE_AV(TARG), i, FALSE); |
| 92 | SP[i+1] = (svp) ? *svp : &PL_sv_undef; |
| 93 | } |
| 94 | } |
| 95 | else { |
| 96 | Copy(AvARRAY((const AV *)TARG), SP+1, maxarg, SV*); |
| 97 | } |
| 98 | SP += maxarg; |
| 99 | } |
| 100 | else if (gimme == G_SCALAR) { |
| 101 | SV* const sv = sv_newmortal(); |
| 102 | const I32 maxarg = AvFILL(MUTABLE_AV(TARG)) + 1; |
| 103 | sv_setiv(sv, maxarg); |
| 104 | PUSHs(sv); |
| 105 | } |
| 106 | RETURN; |
| 107 | } |
| 108 | |
| 109 | PP(pp_padhv) |
| 110 | { |
| 111 | dVAR; dSP; dTARGET; |
| 112 | I32 gimme; |
| 113 | |
| 114 | assert(SvTYPE(TARG) == SVt_PVHV); |
| 115 | XPUSHs(TARG); |
| 116 | if (PL_op->op_private & OPpLVAL_INTRO) |
| 117 | if (!(PL_op->op_private & OPpPAD_STATE)) |
| 118 | SAVECLEARSV(PAD_SVl(PL_op->op_targ)); |
| 119 | if (PL_op->op_flags & OPf_REF) |
| 120 | RETURN; |
| 121 | else if (PL_op->op_private & OPpMAYBE_LVSUB) { |
| 122 | const I32 flags = is_lvalue_sub(); |
| 123 | if (flags && !(flags & OPpENTERSUB_INARGS)) { |
| 124 | if (GIMME == G_SCALAR) |
| 125 | /* diag_listed_as: Can't return %s to lvalue scalar context */ |
| 126 | Perl_croak(aTHX_ "Can't return hash to lvalue scalar context"); |
| 127 | RETURN; |
| 128 | } |
| 129 | } |
| 130 | gimme = GIMME_V; |
| 131 | if (gimme == G_ARRAY) { |
| 132 | RETURNOP(Perl_do_kv(aTHX)); |
| 133 | } |
| 134 | else if (gimme == G_SCALAR) { |
| 135 | SV* const sv = Perl_hv_scalar(aTHX_ MUTABLE_HV(TARG)); |
| 136 | SETs(sv); |
| 137 | } |
| 138 | RETURN; |
| 139 | } |
| 140 | |
| 141 | /* Translations. */ |
| 142 | |
| 143 | static const char S_no_symref_sv[] = |
| 144 | "Can't use string (\"%" SVf32 "\"%s) as %s ref while \"strict refs\" in use"; |
| 145 | |
| 146 | /* In some cases this function inspects PL_op. If this function is called |
| 147 | for new op types, more bool parameters may need to be added in place of |
| 148 | the checks. |
| 149 | |
| 150 | When noinit is true, the absence of a gv will cause a retval of undef. |
| 151 | This is unrelated to the cv-to-gv assignment case. |
| 152 | */ |
| 153 | |
| 154 | static SV * |
| 155 | S_rv2gv(pTHX_ SV *sv, const bool vivify_sv, const bool strict, |
| 156 | const bool noinit) |
| 157 | { |
| 158 | dVAR; |
| 159 | if (!isGV(sv) || SvFAKE(sv)) SvGETMAGIC(sv); |
| 160 | if (SvROK(sv)) { |
| 161 | if (SvAMAGIC(sv)) { |
| 162 | sv = amagic_deref_call(sv, to_gv_amg); |
| 163 | } |
| 164 | wasref: |
| 165 | sv = SvRV(sv); |
| 166 | if (SvTYPE(sv) == SVt_PVIO) { |
| 167 | GV * const gv = MUTABLE_GV(sv_newmortal()); |
| 168 | gv_init(gv, 0, "__ANONIO__", 10, 0); |
| 169 | GvIOp(gv) = MUTABLE_IO(sv); |
| 170 | SvREFCNT_inc_void_NN(sv); |
| 171 | sv = MUTABLE_SV(gv); |
| 172 | } |
| 173 | else if (!isGV_with_GP(sv)) |
| 174 | return (SV *)Perl_die(aTHX_ "Not a GLOB reference"); |
| 175 | } |
| 176 | else { |
| 177 | if (!isGV_with_GP(sv)) { |
| 178 | if (!SvOK(sv)) { |
| 179 | /* If this is a 'my' scalar and flag is set then vivify |
| 180 | * NI-S 1999/05/07 |
| 181 | */ |
| 182 | if (vivify_sv && sv != &PL_sv_undef) { |
| 183 | GV *gv; |
| 184 | if (SvREADONLY(sv)) |
| 185 | Perl_croak_no_modify(aTHX); |
| 186 | if (cUNOP->op_targ) { |
| 187 | SV * const namesv = PAD_SV(cUNOP->op_targ); |
| 188 | gv = MUTABLE_GV(newSV(0)); |
| 189 | gv_init_sv(gv, CopSTASH(PL_curcop), namesv, 0); |
| 190 | } |
| 191 | else { |
| 192 | const char * const name = CopSTASHPV(PL_curcop); |
| 193 | gv = newGVgen_flags(name, |
| 194 | HvNAMEUTF8(CopSTASH(PL_curcop)) ? SVf_UTF8 : 0 ); |
| 195 | } |
| 196 | prepare_SV_for_RV(sv); |
| 197 | SvRV_set(sv, MUTABLE_SV(gv)); |
| 198 | SvROK_on(sv); |
| 199 | SvSETMAGIC(sv); |
| 200 | goto wasref; |
| 201 | } |
| 202 | if (PL_op->op_flags & OPf_REF || strict) |
| 203 | return (SV *)Perl_die(aTHX_ PL_no_usym, "a symbol"); |
| 204 | if (ckWARN(WARN_UNINITIALIZED)) |
| 205 | report_uninit(sv); |
| 206 | return &PL_sv_undef; |
| 207 | } |
| 208 | if (noinit) |
| 209 | { |
| 210 | if (!(sv = MUTABLE_SV(gv_fetchsv_nomg( |
| 211 | sv, GV_ADDMG, SVt_PVGV |
| 212 | )))) |
| 213 | return &PL_sv_undef; |
| 214 | } |
| 215 | else { |
| 216 | if (strict) |
| 217 | return |
| 218 | (SV *)Perl_die(aTHX_ |
| 219 | S_no_symref_sv, |
| 220 | sv, |
| 221 | (SvPOK(sv) && SvCUR(sv)>32 ? "..." : ""), |
| 222 | "a symbol" |
| 223 | ); |
| 224 | if ((PL_op->op_private & (OPpLVAL_INTRO|OPpDONT_INIT_GV)) |
| 225 | == OPpDONT_INIT_GV) { |
| 226 | /* We are the target of a coderef assignment. Return |
| 227 | the scalar unchanged, and let pp_sasssign deal with |
| 228 | things. */ |
| 229 | return sv; |
| 230 | } |
| 231 | sv = MUTABLE_SV(gv_fetchsv_nomg(sv, GV_ADD, SVt_PVGV)); |
| 232 | } |
| 233 | /* FAKE globs in the symbol table cause weird bugs (#77810) */ |
| 234 | SvFAKE_off(sv); |
| 235 | } |
| 236 | } |
| 237 | if (SvFAKE(sv) && !(PL_op->op_private & OPpALLOW_FAKE)) { |
| 238 | SV *newsv = sv_newmortal(); |
| 239 | sv_setsv_flags(newsv, sv, 0); |
| 240 | SvFAKE_off(newsv); |
| 241 | sv = newsv; |
| 242 | } |
| 243 | return sv; |
| 244 | } |
| 245 | |
| 246 | PP(pp_rv2gv) |
| 247 | { |
| 248 | dVAR; dSP; dTOPss; |
| 249 | |
| 250 | sv = S_rv2gv(aTHX_ |
| 251 | sv, PL_op->op_private & OPpDEREF, |
| 252 | PL_op->op_private & HINT_STRICT_REFS, |
| 253 | ((PL_op->op_flags & OPf_SPECIAL) && !(PL_op->op_flags & OPf_MOD)) |
| 254 | || PL_op->op_type == OP_READLINE |
| 255 | ); |
| 256 | if (PL_op->op_private & OPpLVAL_INTRO) |
| 257 | save_gp(MUTABLE_GV(sv), !(PL_op->op_flags & OPf_SPECIAL)); |
| 258 | SETs(sv); |
| 259 | RETURN; |
| 260 | } |
| 261 | |
| 262 | /* Helper function for pp_rv2sv and pp_rv2av */ |
| 263 | GV * |
| 264 | Perl_softref2xv(pTHX_ SV *const sv, const char *const what, |
| 265 | const svtype type, SV ***spp) |
| 266 | { |
| 267 | dVAR; |
| 268 | GV *gv; |
| 269 | |
| 270 | PERL_ARGS_ASSERT_SOFTREF2XV; |
| 271 | |
| 272 | if (PL_op->op_private & HINT_STRICT_REFS) { |
| 273 | if (SvOK(sv)) |
| 274 | Perl_die(aTHX_ S_no_symref_sv, sv, (SvPOK(sv) && SvCUR(sv)>32 ? "..." : ""), what); |
| 275 | else |
| 276 | Perl_die(aTHX_ PL_no_usym, what); |
| 277 | } |
| 278 | if (!SvOK(sv)) { |
| 279 | if ( |
| 280 | PL_op->op_flags & OPf_REF && |
| 281 | PL_op->op_next->op_type != OP_BOOLKEYS |
| 282 | ) |
| 283 | Perl_die(aTHX_ PL_no_usym, what); |
| 284 | if (ckWARN(WARN_UNINITIALIZED)) |
| 285 | report_uninit(sv); |
| 286 | if (type != SVt_PV && GIMME_V == G_ARRAY) { |
| 287 | (*spp)--; |
| 288 | return NULL; |
| 289 | } |
| 290 | **spp = &PL_sv_undef; |
| 291 | return NULL; |
| 292 | } |
| 293 | if ((PL_op->op_flags & OPf_SPECIAL) && |
| 294 | !(PL_op->op_flags & OPf_MOD)) |
| 295 | { |
| 296 | if (!(gv = gv_fetchsv_nomg(sv, GV_ADDMG, type))) |
| 297 | { |
| 298 | **spp = &PL_sv_undef; |
| 299 | return NULL; |
| 300 | } |
| 301 | } |
| 302 | else { |
| 303 | gv = gv_fetchsv_nomg(sv, GV_ADD, type); |
| 304 | } |
| 305 | return gv; |
| 306 | } |
| 307 | |
| 308 | PP(pp_rv2sv) |
| 309 | { |
| 310 | dVAR; dSP; dTOPss; |
| 311 | GV *gv = NULL; |
| 312 | |
| 313 | SvGETMAGIC(sv); |
| 314 | if (SvROK(sv)) { |
| 315 | if (SvAMAGIC(sv)) { |
| 316 | sv = amagic_deref_call(sv, to_sv_amg); |
| 317 | } |
| 318 | |
| 319 | sv = SvRV(sv); |
| 320 | switch (SvTYPE(sv)) { |
| 321 | case SVt_PVAV: |
| 322 | case SVt_PVHV: |
| 323 | case SVt_PVCV: |
| 324 | case SVt_PVFM: |
| 325 | case SVt_PVIO: |
| 326 | DIE(aTHX_ "Not a SCALAR reference"); |
| 327 | default: NOOP; |
| 328 | } |
| 329 | } |
| 330 | else { |
| 331 | gv = MUTABLE_GV(sv); |
| 332 | |
| 333 | if (!isGV_with_GP(gv)) { |
| 334 | gv = Perl_softref2xv(aTHX_ sv, "a SCALAR", SVt_PV, &sp); |
| 335 | if (!gv) |
| 336 | RETURN; |
| 337 | } |
| 338 | sv = GvSVn(gv); |
| 339 | } |
| 340 | if (PL_op->op_flags & OPf_MOD) { |
| 341 | if (PL_op->op_private & OPpLVAL_INTRO) { |
| 342 | if (cUNOP->op_first->op_type == OP_NULL) |
| 343 | sv = save_scalar(MUTABLE_GV(TOPs)); |
| 344 | else if (gv) |
| 345 | sv = save_scalar(gv); |
| 346 | else |
| 347 | Perl_croak(aTHX_ "%s", PL_no_localize_ref); |
| 348 | } |
| 349 | else if (PL_op->op_private & OPpDEREF) |
| 350 | sv = vivify_ref(sv, PL_op->op_private & OPpDEREF); |
| 351 | } |
| 352 | SETs(sv); |
| 353 | RETURN; |
| 354 | } |
| 355 | |
| 356 | PP(pp_av2arylen) |
| 357 | { |
| 358 | dVAR; dSP; |
| 359 | AV * const av = MUTABLE_AV(TOPs); |
| 360 | const I32 lvalue = PL_op->op_flags & OPf_MOD || LVRET; |
| 361 | if (lvalue) { |
| 362 | SV ** const sv = Perl_av_arylen_p(aTHX_ MUTABLE_AV(av)); |
| 363 | if (!*sv) { |
| 364 | *sv = newSV_type(SVt_PVMG); |
| 365 | sv_magic(*sv, MUTABLE_SV(av), PERL_MAGIC_arylen, NULL, 0); |
| 366 | } |
| 367 | SETs(*sv); |
| 368 | } else { |
| 369 | SETs(sv_2mortal(newSViv(AvFILL(MUTABLE_AV(av))))); |
| 370 | } |
| 371 | RETURN; |
| 372 | } |
| 373 | |
| 374 | PP(pp_pos) |
| 375 | { |
| 376 | dVAR; dSP; dPOPss; |
| 377 | |
| 378 | if (PL_op->op_flags & OPf_MOD || LVRET) { |
| 379 | SV * const ret = sv_2mortal(newSV_type(SVt_PVLV)); /* Not TARG RT#67838 */ |
| 380 | sv_magic(ret, NULL, PERL_MAGIC_pos, NULL, 0); |
| 381 | LvTYPE(ret) = '.'; |
| 382 | LvTARG(ret) = SvREFCNT_inc_simple(sv); |
| 383 | PUSHs(ret); /* no SvSETMAGIC */ |
| 384 | RETURN; |
| 385 | } |
| 386 | else { |
| 387 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) { |
| 388 | const MAGIC * const mg = mg_find(sv, PERL_MAGIC_regex_global); |
| 389 | if (mg && mg->mg_len >= 0) { |
| 390 | dTARGET; |
| 391 | I32 i = mg->mg_len; |
| 392 | if (DO_UTF8(sv)) |
| 393 | sv_pos_b2u(sv, &i); |
| 394 | PUSHi(i); |
| 395 | RETURN; |
| 396 | } |
| 397 | } |
| 398 | RETPUSHUNDEF; |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | PP(pp_rv2cv) |
| 403 | { |
| 404 | dVAR; dSP; |
| 405 | GV *gv; |
| 406 | HV *stash_unused; |
| 407 | const I32 flags = (PL_op->op_flags & OPf_SPECIAL) |
| 408 | ? GV_ADDMG |
| 409 | : ((PL_op->op_private & (OPpLVAL_INTRO|OPpMAY_RETURN_CONSTANT)) == OPpMAY_RETURN_CONSTANT) |
| 410 | ? GV_ADD|GV_NOEXPAND |
| 411 | : GV_ADD; |
| 412 | /* We usually try to add a non-existent subroutine in case of AUTOLOAD. */ |
| 413 | /* (But not in defined().) */ |
| 414 | |
| 415 | CV *cv = sv_2cv(TOPs, &stash_unused, &gv, flags); |
| 416 | if (cv) { |
| 417 | if (CvCLONE(cv)) |
| 418 | cv = MUTABLE_CV(sv_2mortal(MUTABLE_SV(cv_clone(cv)))); |
| 419 | } |
| 420 | else if ((flags == (GV_ADD|GV_NOEXPAND)) && gv && SvROK(gv)) { |
| 421 | cv = MUTABLE_CV(gv); |
| 422 | } |
| 423 | else |
| 424 | cv = MUTABLE_CV(&PL_sv_undef); |
| 425 | SETs(MUTABLE_SV(cv)); |
| 426 | RETURN; |
| 427 | } |
| 428 | |
| 429 | PP(pp_prototype) |
| 430 | { |
| 431 | dVAR; dSP; |
| 432 | CV *cv; |
| 433 | HV *stash; |
| 434 | GV *gv; |
| 435 | SV *ret = &PL_sv_undef; |
| 436 | |
| 437 | if (SvPOK(TOPs) && SvCUR(TOPs) >= 7) { |
| 438 | const char * s = SvPVX_const(TOPs); |
| 439 | if (strnEQ(s, "CORE::", 6)) { |
| 440 | const int code = keyword(s + 6, SvCUR(TOPs) - 6, 1); |
| 441 | if (!code || code == -KEY_CORE) |
| 442 | DIE(aTHX_ "Can't find an opnumber for \"%s\"", s+6); |
| 443 | if (code < 0) { /* Overridable. */ |
| 444 | SV * const sv = core_prototype(NULL, s + 6, code, NULL); |
| 445 | if (sv) ret = sv; |
| 446 | } |
| 447 | goto set; |
| 448 | } |
| 449 | } |
| 450 | cv = sv_2cv(TOPs, &stash, &gv, 0); |
| 451 | if (cv && SvPOK(cv)) |
| 452 | ret = newSVpvn_flags( |
| 453 | CvPROTO(cv), CvPROTOLEN(cv), SVs_TEMP | SvUTF8(cv) |
| 454 | ); |
| 455 | set: |
| 456 | SETs(ret); |
| 457 | RETURN; |
| 458 | } |
| 459 | |
| 460 | PP(pp_anoncode) |
| 461 | { |
| 462 | dVAR; dSP; |
| 463 | CV *cv = MUTABLE_CV(PAD_SV(PL_op->op_targ)); |
| 464 | if (CvCLONE(cv)) |
| 465 | cv = MUTABLE_CV(sv_2mortal(MUTABLE_SV(cv_clone(cv)))); |
| 466 | EXTEND(SP,1); |
| 467 | PUSHs(MUTABLE_SV(cv)); |
| 468 | RETURN; |
| 469 | } |
| 470 | |
| 471 | PP(pp_srefgen) |
| 472 | { |
| 473 | dVAR; dSP; |
| 474 | *SP = refto(*SP); |
| 475 | RETURN; |
| 476 | } |
| 477 | |
| 478 | PP(pp_refgen) |
| 479 | { |
| 480 | dVAR; dSP; dMARK; |
| 481 | if (GIMME != G_ARRAY) { |
| 482 | if (++MARK <= SP) |
| 483 | *MARK = *SP; |
| 484 | else |
| 485 | *MARK = &PL_sv_undef; |
| 486 | *MARK = refto(*MARK); |
| 487 | SP = MARK; |
| 488 | RETURN; |
| 489 | } |
| 490 | EXTEND_MORTAL(SP - MARK); |
| 491 | while (++MARK <= SP) |
| 492 | *MARK = refto(*MARK); |
| 493 | RETURN; |
| 494 | } |
| 495 | |
| 496 | STATIC SV* |
| 497 | S_refto(pTHX_ SV *sv) |
| 498 | { |
| 499 | dVAR; |
| 500 | SV* rv; |
| 501 | |
| 502 | PERL_ARGS_ASSERT_REFTO; |
| 503 | |
| 504 | if (SvTYPE(sv) == SVt_PVLV && LvTYPE(sv) == 'y') { |
| 505 | if (LvTARGLEN(sv)) |
| 506 | vivify_defelem(sv); |
| 507 | if (!(sv = LvTARG(sv))) |
| 508 | sv = &PL_sv_undef; |
| 509 | else |
| 510 | SvREFCNT_inc_void_NN(sv); |
| 511 | } |
| 512 | else if (SvTYPE(sv) == SVt_PVAV) { |
| 513 | if (!AvREAL((const AV *)sv) && AvREIFY((const AV *)sv)) |
| 514 | av_reify(MUTABLE_AV(sv)); |
| 515 | SvTEMP_off(sv); |
| 516 | SvREFCNT_inc_void_NN(sv); |
| 517 | } |
| 518 | else if (SvPADTMP(sv) && !IS_PADGV(sv)) |
| 519 | sv = newSVsv(sv); |
| 520 | else { |
| 521 | SvTEMP_off(sv); |
| 522 | SvREFCNT_inc_void_NN(sv); |
| 523 | } |
| 524 | rv = sv_newmortal(); |
| 525 | sv_upgrade(rv, SVt_IV); |
| 526 | SvRV_set(rv, sv); |
| 527 | SvROK_on(rv); |
| 528 | return rv; |
| 529 | } |
| 530 | |
| 531 | PP(pp_ref) |
| 532 | { |
| 533 | dVAR; dSP; dTARGET; |
| 534 | SV * const sv = POPs; |
| 535 | |
| 536 | if (sv) |
| 537 | SvGETMAGIC(sv); |
| 538 | |
| 539 | if (!sv || !SvROK(sv)) |
| 540 | RETPUSHNO; |
| 541 | |
| 542 | (void)sv_ref(TARG,SvRV(sv),TRUE); |
| 543 | PUSHTARG; |
| 544 | RETURN; |
| 545 | } |
| 546 | |
| 547 | PP(pp_bless) |
| 548 | { |
| 549 | dVAR; dSP; |
| 550 | HV *stash; |
| 551 | |
| 552 | if (MAXARG == 1) |
| 553 | curstash: |
| 554 | stash = CopSTASH(PL_curcop); |
| 555 | else { |
| 556 | SV * const ssv = POPs; |
| 557 | STRLEN len; |
| 558 | const char *ptr; |
| 559 | |
| 560 | if (!ssv) goto curstash; |
| 561 | if (!SvGMAGICAL(ssv) && !SvAMAGIC(ssv) && SvROK(ssv)) |
| 562 | Perl_croak(aTHX_ "Attempt to bless into a reference"); |
| 563 | ptr = SvPV_const(ssv,len); |
| 564 | if (len == 0) |
| 565 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), |
| 566 | "Explicit blessing to '' (assuming package main)"); |
| 567 | stash = gv_stashpvn(ptr, len, GV_ADD|SvUTF8(ssv)); |
| 568 | } |
| 569 | |
| 570 | (void)sv_bless(TOPs, stash); |
| 571 | RETURN; |
| 572 | } |
| 573 | |
| 574 | PP(pp_gelem) |
| 575 | { |
| 576 | dVAR; dSP; |
| 577 | |
| 578 | SV *sv = POPs; |
| 579 | STRLEN len; |
| 580 | const char * const elem = SvPV_const(sv, len); |
| 581 | GV * const gv = MUTABLE_GV(POPs); |
| 582 | SV * tmpRef = NULL; |
| 583 | |
| 584 | sv = NULL; |
| 585 | if (elem) { |
| 586 | /* elem will always be NUL terminated. */ |
| 587 | const char * const second_letter = elem + 1; |
| 588 | switch (*elem) { |
| 589 | case 'A': |
| 590 | if (len == 5 && strEQ(second_letter, "RRAY")) |
| 591 | tmpRef = MUTABLE_SV(GvAV(gv)); |
| 592 | break; |
| 593 | case 'C': |
| 594 | if (len == 4 && strEQ(second_letter, "ODE")) |
| 595 | tmpRef = MUTABLE_SV(GvCVu(gv)); |
| 596 | break; |
| 597 | case 'F': |
| 598 | if (len == 10 && strEQ(second_letter, "ILEHANDLE")) { |
| 599 | /* finally deprecated in 5.8.0 */ |
| 600 | deprecate("*glob{FILEHANDLE}"); |
| 601 | tmpRef = MUTABLE_SV(GvIOp(gv)); |
| 602 | } |
| 603 | else |
| 604 | if (len == 6 && strEQ(second_letter, "ORMAT")) |
| 605 | tmpRef = MUTABLE_SV(GvFORM(gv)); |
| 606 | break; |
| 607 | case 'G': |
| 608 | if (len == 4 && strEQ(second_letter, "LOB")) |
| 609 | tmpRef = MUTABLE_SV(gv); |
| 610 | break; |
| 611 | case 'H': |
| 612 | if (len == 4 && strEQ(second_letter, "ASH")) |
| 613 | tmpRef = MUTABLE_SV(GvHV(gv)); |
| 614 | break; |
| 615 | case 'I': |
| 616 | if (*second_letter == 'O' && !elem[2] && len == 2) |
| 617 | tmpRef = MUTABLE_SV(GvIOp(gv)); |
| 618 | break; |
| 619 | case 'N': |
| 620 | if (len == 4 && strEQ(second_letter, "AME")) |
| 621 | sv = newSVhek(GvNAME_HEK(gv)); |
| 622 | break; |
| 623 | case 'P': |
| 624 | if (len == 7 && strEQ(second_letter, "ACKAGE")) { |
| 625 | const HV * const stash = GvSTASH(gv); |
| 626 | const HEK * const hek = stash ? HvNAME_HEK(stash) : NULL; |
| 627 | sv = hek ? newSVhek(hek) : newSVpvs("__ANON__"); |
| 628 | } |
| 629 | break; |
| 630 | case 'S': |
| 631 | if (len == 6 && strEQ(second_letter, "CALAR")) |
| 632 | tmpRef = GvSVn(gv); |
| 633 | break; |
| 634 | } |
| 635 | } |
| 636 | if (tmpRef) |
| 637 | sv = newRV(tmpRef); |
| 638 | if (sv) |
| 639 | sv_2mortal(sv); |
| 640 | else |
| 641 | sv = &PL_sv_undef; |
| 642 | XPUSHs(sv); |
| 643 | RETURN; |
| 644 | } |
| 645 | |
| 646 | /* Pattern matching */ |
| 647 | |
| 648 | PP(pp_study) |
| 649 | { |
| 650 | dVAR; dSP; dPOPss; |
| 651 | register unsigned char *s; |
| 652 | char *sfirst_raw; |
| 653 | STRLEN len; |
| 654 | MAGIC *mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_study) : NULL; |
| 655 | U8 quanta; |
| 656 | STRLEN size; |
| 657 | |
| 658 | if (mg && SvSCREAM(sv)) |
| 659 | RETPUSHYES; |
| 660 | |
| 661 | s = (unsigned char*)(SvPV(sv, len)); |
| 662 | if (len == 0 || len > I32_MAX || !SvPOK(sv) || SvUTF8(sv) || SvVALID(sv)) { |
| 663 | /* No point in studying a zero length string, and not safe to study |
| 664 | anything that doesn't appear to be a simple scalar (and hence might |
| 665 | change between now and when the regexp engine runs without our set |
| 666 | magic ever running) such as a reference to an object with overloaded |
| 667 | stringification. Also refuse to study an FBM scalar, as this gives |
| 668 | more flexibility in SV flag usage. No real-world code would ever |
| 669 | end up studying an FBM scalar, so this isn't a real pessimisation. |
| 670 | Endemic use of I32 in Perl_screaminstr makes it hard to safely push |
| 671 | the study length limit from I32_MAX to U32_MAX - 1. |
| 672 | */ |
| 673 | RETPUSHNO; |
| 674 | } |
| 675 | |
| 676 | if (len < 0xFF) { |
| 677 | quanta = 1; |
| 678 | } else if (len < 0xFFFF) { |
| 679 | quanta = 2; |
| 680 | } else |
| 681 | quanta = 4; |
| 682 | |
| 683 | size = (256 + len) * quanta; |
| 684 | sfirst_raw = (char *)safemalloc(size); |
| 685 | |
| 686 | if (!sfirst_raw) |
| 687 | DIE(aTHX_ "do_study: out of memory"); |
| 688 | |
| 689 | SvSCREAM_on(sv); |
| 690 | if (!mg) |
| 691 | mg = sv_magicext(sv, NULL, PERL_MAGIC_study, &PL_vtbl_regexp, NULL, 0); |
| 692 | mg->mg_ptr = sfirst_raw; |
| 693 | mg->mg_len = size; |
| 694 | mg->mg_private = quanta; |
| 695 | |
| 696 | memset(sfirst_raw, ~0, 256 * quanta); |
| 697 | |
| 698 | /* The assumption here is that most studied strings are fairly short, hence |
| 699 | the pain of the extra code is worth it, given the memory savings. |
| 700 | 80 character string, 336 bytes as U8, down from 1344 as U32 |
| 701 | 800 character string, 2112 bytes as U16, down from 4224 as U32 |
| 702 | */ |
| 703 | |
| 704 | if (quanta == 1) { |
| 705 | U8 *const sfirst = (U8 *)sfirst_raw; |
| 706 | U8 *const snext = sfirst + 256; |
| 707 | while (len-- > 0) { |
| 708 | const U8 ch = s[len]; |
| 709 | snext[len] = sfirst[ch]; |
| 710 | sfirst[ch] = len; |
| 711 | } |
| 712 | } else if (quanta == 2) { |
| 713 | U16 *const sfirst = (U16 *)sfirst_raw; |
| 714 | U16 *const snext = sfirst + 256; |
| 715 | while (len-- > 0) { |
| 716 | const U8 ch = s[len]; |
| 717 | snext[len] = sfirst[ch]; |
| 718 | sfirst[ch] = len; |
| 719 | } |
| 720 | } else { |
| 721 | U32 *const sfirst = (U32 *)sfirst_raw; |
| 722 | U32 *const snext = sfirst + 256; |
| 723 | while (len-- > 0) { |
| 724 | const U8 ch = s[len]; |
| 725 | snext[len] = sfirst[ch]; |
| 726 | sfirst[ch] = len; |
| 727 | } |
| 728 | } |
| 729 | |
| 730 | RETPUSHYES; |
| 731 | } |
| 732 | |
| 733 | PP(pp_trans) |
| 734 | { |
| 735 | dVAR; dSP; dTARG; |
| 736 | SV *sv; |
| 737 | |
| 738 | if (PL_op->op_flags & OPf_STACKED) |
| 739 | sv = POPs; |
| 740 | else if (PL_op->op_private & OPpTARGET_MY) |
| 741 | sv = GETTARGET; |
| 742 | else { |
| 743 | sv = DEFSV; |
| 744 | EXTEND(SP,1); |
| 745 | } |
| 746 | TARG = sv_newmortal(); |
| 747 | if(PL_op->op_type == OP_TRANSR) { |
| 748 | STRLEN len; |
| 749 | const char * const pv = SvPV(sv,len); |
| 750 | SV * const newsv = newSVpvn_flags(pv, len, SVs_TEMP|SvUTF8(sv)); |
| 751 | do_trans(newsv); |
| 752 | PUSHs(newsv); |
| 753 | } |
| 754 | else PUSHi(do_trans(sv)); |
| 755 | RETURN; |
| 756 | } |
| 757 | |
| 758 | /* Lvalue operators. */ |
| 759 | |
| 760 | static void |
| 761 | S_do_chomp(pTHX_ SV *retval, SV *sv, bool chomping) |
| 762 | { |
| 763 | dVAR; |
| 764 | STRLEN len; |
| 765 | char *s; |
| 766 | |
| 767 | PERL_ARGS_ASSERT_DO_CHOMP; |
| 768 | |
| 769 | if (chomping && (RsSNARF(PL_rs) || RsRECORD(PL_rs))) |
| 770 | return; |
| 771 | if (SvTYPE(sv) == SVt_PVAV) { |
| 772 | I32 i; |
| 773 | AV *const av = MUTABLE_AV(sv); |
| 774 | const I32 max = AvFILL(av); |
| 775 | |
| 776 | for (i = 0; i <= max; i++) { |
| 777 | sv = MUTABLE_SV(av_fetch(av, i, FALSE)); |
| 778 | if (sv && ((sv = *(SV**)sv), sv != &PL_sv_undef)) |
| 779 | do_chomp(retval, sv, chomping); |
| 780 | } |
| 781 | return; |
| 782 | } |
| 783 | else if (SvTYPE(sv) == SVt_PVHV) { |
| 784 | HV* const hv = MUTABLE_HV(sv); |
| 785 | HE* entry; |
| 786 | (void)hv_iterinit(hv); |
| 787 | while ((entry = hv_iternext(hv))) |
| 788 | do_chomp(retval, hv_iterval(hv,entry), chomping); |
| 789 | return; |
| 790 | } |
| 791 | else if (SvREADONLY(sv)) { |
| 792 | if (SvFAKE(sv)) { |
| 793 | /* SV is copy-on-write */ |
| 794 | sv_force_normal_flags(sv, 0); |
| 795 | } |
| 796 | else |
| 797 | Perl_croak_no_modify(aTHX); |
| 798 | } |
| 799 | |
| 800 | if (PL_encoding) { |
| 801 | if (!SvUTF8(sv)) { |
| 802 | /* XXX, here sv is utf8-ized as a side-effect! |
| 803 | If encoding.pm is used properly, almost string-generating |
| 804 | operations, including literal strings, chr(), input data, etc. |
| 805 | should have been utf8-ized already, right? |
| 806 | */ |
| 807 | sv_recode_to_utf8(sv, PL_encoding); |
| 808 | } |
| 809 | } |
| 810 | |
| 811 | s = SvPV(sv, len); |
| 812 | if (chomping) { |
| 813 | char *temp_buffer = NULL; |
| 814 | SV *svrecode = NULL; |
| 815 | |
| 816 | if (s && len) { |
| 817 | s += --len; |
| 818 | if (RsPARA(PL_rs)) { |
| 819 | if (*s != '\n') |
| 820 | goto nope; |
| 821 | ++SvIVX(retval); |
| 822 | while (len && s[-1] == '\n') { |
| 823 | --len; |
| 824 | --s; |
| 825 | ++SvIVX(retval); |
| 826 | } |
| 827 | } |
| 828 | else { |
| 829 | STRLEN rslen, rs_charlen; |
| 830 | const char *rsptr = SvPV_const(PL_rs, rslen); |
| 831 | |
| 832 | rs_charlen = SvUTF8(PL_rs) |
| 833 | ? sv_len_utf8(PL_rs) |
| 834 | : rslen; |
| 835 | |
| 836 | if (SvUTF8(PL_rs) != SvUTF8(sv)) { |
| 837 | /* Assumption is that rs is shorter than the scalar. */ |
| 838 | if (SvUTF8(PL_rs)) { |
| 839 | /* RS is utf8, scalar is 8 bit. */ |
| 840 | bool is_utf8 = TRUE; |
| 841 | temp_buffer = (char*)bytes_from_utf8((U8*)rsptr, |
| 842 | &rslen, &is_utf8); |
| 843 | if (is_utf8) { |
| 844 | /* Cannot downgrade, therefore cannot possibly match |
| 845 | */ |
| 846 | assert (temp_buffer == rsptr); |
| 847 | temp_buffer = NULL; |
| 848 | goto nope; |
| 849 | } |
| 850 | rsptr = temp_buffer; |
| 851 | } |
| 852 | else if (PL_encoding) { |
| 853 | /* RS is 8 bit, encoding.pm is used. |
| 854 | * Do not recode PL_rs as a side-effect. */ |
| 855 | svrecode = newSVpvn(rsptr, rslen); |
| 856 | sv_recode_to_utf8(svrecode, PL_encoding); |
| 857 | rsptr = SvPV_const(svrecode, rslen); |
| 858 | rs_charlen = sv_len_utf8(svrecode); |
| 859 | } |
| 860 | else { |
| 861 | /* RS is 8 bit, scalar is utf8. */ |
| 862 | temp_buffer = (char*)bytes_to_utf8((U8*)rsptr, &rslen); |
| 863 | rsptr = temp_buffer; |
| 864 | } |
| 865 | } |
| 866 | if (rslen == 1) { |
| 867 | if (*s != *rsptr) |
| 868 | goto nope; |
| 869 | ++SvIVX(retval); |
| 870 | } |
| 871 | else { |
| 872 | if (len < rslen - 1) |
| 873 | goto nope; |
| 874 | len -= rslen - 1; |
| 875 | s -= rslen - 1; |
| 876 | if (memNE(s, rsptr, rslen)) |
| 877 | goto nope; |
| 878 | SvIVX(retval) += rs_charlen; |
| 879 | } |
| 880 | } |
| 881 | s = SvPV_force_nomg_nolen(sv); |
| 882 | SvCUR_set(sv, len); |
| 883 | *SvEND(sv) = '\0'; |
| 884 | SvNIOK_off(sv); |
| 885 | SvSETMAGIC(sv); |
| 886 | } |
| 887 | nope: |
| 888 | |
| 889 | SvREFCNT_dec(svrecode); |
| 890 | |
| 891 | Safefree(temp_buffer); |
| 892 | } else { |
| 893 | if (len && !SvPOK(sv)) |
| 894 | s = SvPV_force_nomg(sv, len); |
| 895 | if (DO_UTF8(sv)) { |
| 896 | if (s && len) { |
| 897 | char * const send = s + len; |
| 898 | char * const start = s; |
| 899 | s = send - 1; |
| 900 | while (s > start && UTF8_IS_CONTINUATION(*s)) |
| 901 | s--; |
| 902 | if (is_utf8_string((U8*)s, send - s)) { |
| 903 | sv_setpvn(retval, s, send - s); |
| 904 | *s = '\0'; |
| 905 | SvCUR_set(sv, s - start); |
| 906 | SvNIOK_off(sv); |
| 907 | SvUTF8_on(retval); |
| 908 | } |
| 909 | } |
| 910 | else |
| 911 | sv_setpvs(retval, ""); |
| 912 | } |
| 913 | else if (s && len) { |
| 914 | s += --len; |
| 915 | sv_setpvn(retval, s, 1); |
| 916 | *s = '\0'; |
| 917 | SvCUR_set(sv, len); |
| 918 | SvUTF8_off(sv); |
| 919 | SvNIOK_off(sv); |
| 920 | } |
| 921 | else |
| 922 | sv_setpvs(retval, ""); |
| 923 | SvSETMAGIC(sv); |
| 924 | } |
| 925 | } |
| 926 | |
| 927 | PP(pp_schop) |
| 928 | { |
| 929 | dVAR; dSP; dTARGET; |
| 930 | const bool chomping = PL_op->op_type == OP_SCHOMP; |
| 931 | |
| 932 | if (chomping) |
| 933 | sv_setiv(TARG, 0); |
| 934 | do_chomp(TARG, TOPs, chomping); |
| 935 | SETTARG; |
| 936 | RETURN; |
| 937 | } |
| 938 | |
| 939 | PP(pp_chop) |
| 940 | { |
| 941 | dVAR; dSP; dMARK; dTARGET; dORIGMARK; |
| 942 | const bool chomping = PL_op->op_type == OP_CHOMP; |
| 943 | |
| 944 | if (chomping) |
| 945 | sv_setiv(TARG, 0); |
| 946 | while (MARK < SP) |
| 947 | do_chomp(TARG, *++MARK, chomping); |
| 948 | SP = ORIGMARK; |
| 949 | XPUSHTARG; |
| 950 | RETURN; |
| 951 | } |
| 952 | |
| 953 | PP(pp_undef) |
| 954 | { |
| 955 | dVAR; dSP; |
| 956 | SV *sv; |
| 957 | |
| 958 | if (!PL_op->op_private) { |
| 959 | EXTEND(SP, 1); |
| 960 | RETPUSHUNDEF; |
| 961 | } |
| 962 | |
| 963 | sv = POPs; |
| 964 | if (!sv) |
| 965 | RETPUSHUNDEF; |
| 966 | |
| 967 | SV_CHECK_THINKFIRST_COW_DROP(sv); |
| 968 | |
| 969 | switch (SvTYPE(sv)) { |
| 970 | case SVt_NULL: |
| 971 | break; |
| 972 | case SVt_PVAV: |
| 973 | av_undef(MUTABLE_AV(sv)); |
| 974 | break; |
| 975 | case SVt_PVHV: |
| 976 | hv_undef(MUTABLE_HV(sv)); |
| 977 | break; |
| 978 | case SVt_PVCV: |
| 979 | if (cv_const_sv((const CV *)sv)) |
| 980 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), |
| 981 | "Constant subroutine %"SVf" undefined", |
| 982 | SVfARG(CvANON((const CV *)sv) |
| 983 | ? newSVpvs_flags("(anonymous)", SVs_TEMP) |
| 984 | : sv_2mortal(newSVhek(GvENAME_HEK(CvGV((const CV *)sv)))))); |
| 985 | /* FALLTHROUGH */ |
| 986 | case SVt_PVFM: |
| 987 | { |
| 988 | /* let user-undef'd sub keep its identity */ |
| 989 | GV* const gv = CvGV((const CV *)sv); |
| 990 | cv_undef(MUTABLE_CV(sv)); |
| 991 | CvGV_set(MUTABLE_CV(sv), gv); |
| 992 | } |
| 993 | break; |
| 994 | case SVt_PVGV: |
| 995 | if (SvFAKE(sv)) { |
| 996 | SvSetMagicSV(sv, &PL_sv_undef); |
| 997 | break; |
| 998 | } |
| 999 | else if (isGV_with_GP(sv)) { |
| 1000 | GP *gp; |
| 1001 | HV *stash; |
| 1002 | |
| 1003 | /* undef *Pkg::meth_name ... */ |
| 1004 | bool method_changed |
| 1005 | = GvCVu((const GV *)sv) && (stash = GvSTASH((const GV *)sv)) |
| 1006 | && HvENAME_get(stash); |
| 1007 | /* undef *Foo:: */ |
| 1008 | if((stash = GvHV((const GV *)sv))) { |
| 1009 | if(HvENAME_get(stash)) |
| 1010 | SvREFCNT_inc_simple_void_NN(sv_2mortal((SV *)stash)); |
| 1011 | else stash = NULL; |
| 1012 | } |
| 1013 | |
| 1014 | gp_free(MUTABLE_GV(sv)); |
| 1015 | Newxz(gp, 1, GP); |
| 1016 | GvGP_set(sv, gp_ref(gp)); |
| 1017 | GvSV(sv) = newSV(0); |
| 1018 | GvLINE(sv) = CopLINE(PL_curcop); |
| 1019 | GvEGV(sv) = MUTABLE_GV(sv); |
| 1020 | GvMULTI_on(sv); |
| 1021 | |
| 1022 | if(stash) |
| 1023 | mro_package_moved(NULL, stash, (const GV *)sv, 0); |
| 1024 | stash = NULL; |
| 1025 | /* undef *Foo::ISA */ |
| 1026 | if( strEQ(GvNAME((const GV *)sv), "ISA") |
| 1027 | && (stash = GvSTASH((const GV *)sv)) |
| 1028 | && (method_changed || HvENAME(stash)) ) |
| 1029 | mro_isa_changed_in(stash); |
| 1030 | else if(method_changed) |
| 1031 | mro_method_changed_in( |
| 1032 | GvSTASH((const GV *)sv) |
| 1033 | ); |
| 1034 | |
| 1035 | break; |
| 1036 | } |
| 1037 | /* FALL THROUGH */ |
| 1038 | default: |
| 1039 | if (SvTYPE(sv) >= SVt_PV && SvPVX_const(sv) && SvLEN(sv)) { |
| 1040 | SvPV_free(sv); |
| 1041 | SvPV_set(sv, NULL); |
| 1042 | SvLEN_set(sv, 0); |
| 1043 | } |
| 1044 | SvOK_off(sv); |
| 1045 | SvSETMAGIC(sv); |
| 1046 | } |
| 1047 | |
| 1048 | RETPUSHUNDEF; |
| 1049 | } |
| 1050 | |
| 1051 | PP(pp_postinc) |
| 1052 | { |
| 1053 | dVAR; dSP; dTARGET; |
| 1054 | const bool inc = |
| 1055 | PL_op->op_type == OP_POSTINC || PL_op->op_type == OP_I_POSTINC; |
| 1056 | if (SvTYPE(TOPs) >= SVt_PVAV || (isGV_with_GP(TOPs) && !SvFAKE(TOPs))) |
| 1057 | Perl_croak_no_modify(aTHX); |
| 1058 | if (SvROK(TOPs)) |
| 1059 | TARG = sv_newmortal(); |
| 1060 | sv_setsv(TARG, TOPs); |
| 1061 | if (!SvREADONLY(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) |
| 1062 | && SvIVX(TOPs) != (inc ? IV_MAX : IV_MIN)) |
| 1063 | { |
| 1064 | SvIV_set(TOPs, SvIVX(TOPs) + (inc ? 1 : -1)); |
| 1065 | SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK); |
| 1066 | } |
| 1067 | else if (inc) |
| 1068 | sv_inc_nomg(TOPs); |
| 1069 | else sv_dec_nomg(TOPs); |
| 1070 | SvSETMAGIC(TOPs); |
| 1071 | /* special case for undef: see thread at 2003-03/msg00536.html in archive */ |
| 1072 | if (inc && !SvOK(TARG)) |
| 1073 | sv_setiv(TARG, 0); |
| 1074 | SETs(TARG); |
| 1075 | return NORMAL; |
| 1076 | } |
| 1077 | |
| 1078 | /* Ordinary operators. */ |
| 1079 | |
| 1080 | PP(pp_pow) |
| 1081 | { |
| 1082 | dVAR; dSP; dATARGET; SV *svl, *svr; |
| 1083 | #ifdef PERL_PRESERVE_IVUV |
| 1084 | bool is_int = 0; |
| 1085 | #endif |
| 1086 | tryAMAGICbin_MG(pow_amg, AMGf_assign|AMGf_numeric); |
| 1087 | svr = TOPs; |
| 1088 | svl = TOPm1s; |
| 1089 | #ifdef PERL_PRESERVE_IVUV |
| 1090 | /* For integer to integer power, we do the calculation by hand wherever |
| 1091 | we're sure it is safe; otherwise we call pow() and try to convert to |
| 1092 | integer afterwards. */ |
| 1093 | { |
| 1094 | SvIV_please_nomg(svr); |
| 1095 | if (SvIOK(svr)) { |
| 1096 | SvIV_please_nomg(svl); |
| 1097 | if (SvIOK(svl)) { |
| 1098 | UV power; |
| 1099 | bool baseuok; |
| 1100 | UV baseuv; |
| 1101 | |
| 1102 | if (SvUOK(svr)) { |
| 1103 | power = SvUVX(svr); |
| 1104 | } else { |
| 1105 | const IV iv = SvIVX(svr); |
| 1106 | if (iv >= 0) { |
| 1107 | power = iv; |
| 1108 | } else { |
| 1109 | goto float_it; /* Can't do negative powers this way. */ |
| 1110 | } |
| 1111 | } |
| 1112 | |
| 1113 | baseuok = SvUOK(svl); |
| 1114 | if (baseuok) { |
| 1115 | baseuv = SvUVX(svl); |
| 1116 | } else { |
| 1117 | const IV iv = SvIVX(svl); |
| 1118 | if (iv >= 0) { |
| 1119 | baseuv = iv; |
| 1120 | baseuok = TRUE; /* effectively it's a UV now */ |
| 1121 | } else { |
| 1122 | baseuv = -iv; /* abs, baseuok == false records sign */ |
| 1123 | } |
| 1124 | } |
| 1125 | /* now we have integer ** positive integer. */ |
| 1126 | is_int = 1; |
| 1127 | |
| 1128 | /* foo & (foo - 1) is zero only for a power of 2. */ |
| 1129 | if (!(baseuv & (baseuv - 1))) { |
| 1130 | /* We are raising power-of-2 to a positive integer. |
| 1131 | The logic here will work for any base (even non-integer |
| 1132 | bases) but it can be less accurate than |
| 1133 | pow (base,power) or exp (power * log (base)) when the |
| 1134 | intermediate values start to spill out of the mantissa. |
| 1135 | With powers of 2 we know this can't happen. |
| 1136 | And powers of 2 are the favourite thing for perl |
| 1137 | programmers to notice ** not doing what they mean. */ |
| 1138 | NV result = 1.0; |
| 1139 | NV base = baseuok ? baseuv : -(NV)baseuv; |
| 1140 | |
| 1141 | if (power & 1) { |
| 1142 | result *= base; |
| 1143 | } |
| 1144 | while (power >>= 1) { |
| 1145 | base *= base; |
| 1146 | if (power & 1) { |
| 1147 | result *= base; |
| 1148 | } |
| 1149 | } |
| 1150 | SP--; |
| 1151 | SETn( result ); |
| 1152 | SvIV_please_nomg(svr); |
| 1153 | RETURN; |
| 1154 | } else { |
| 1155 | register unsigned int highbit = 8 * sizeof(UV); |
| 1156 | register unsigned int diff = 8 * sizeof(UV); |
| 1157 | while (diff >>= 1) { |
| 1158 | highbit -= diff; |
| 1159 | if (baseuv >> highbit) { |
| 1160 | highbit += diff; |
| 1161 | } |
| 1162 | } |
| 1163 | /* we now have baseuv < 2 ** highbit */ |
| 1164 | if (power * highbit <= 8 * sizeof(UV)) { |
| 1165 | /* result will definitely fit in UV, so use UV math |
| 1166 | on same algorithm as above */ |
| 1167 | register UV result = 1; |
| 1168 | register UV base = baseuv; |
| 1169 | const bool odd_power = cBOOL(power & 1); |
| 1170 | if (odd_power) { |
| 1171 | result *= base; |
| 1172 | } |
| 1173 | while (power >>= 1) { |
| 1174 | base *= base; |
| 1175 | if (power & 1) { |
| 1176 | result *= base; |
| 1177 | } |
| 1178 | } |
| 1179 | SP--; |
| 1180 | if (baseuok || !odd_power) |
| 1181 | /* answer is positive */ |
| 1182 | SETu( result ); |
| 1183 | else if (result <= (UV)IV_MAX) |
| 1184 | /* answer negative, fits in IV */ |
| 1185 | SETi( -(IV)result ); |
| 1186 | else if (result == (UV)IV_MIN) |
| 1187 | /* 2's complement assumption: special case IV_MIN */ |
| 1188 | SETi( IV_MIN ); |
| 1189 | else |
| 1190 | /* answer negative, doesn't fit */ |
| 1191 | SETn( -(NV)result ); |
| 1192 | RETURN; |
| 1193 | } |
| 1194 | } |
| 1195 | } |
| 1196 | } |
| 1197 | } |
| 1198 | float_it: |
| 1199 | #endif |
| 1200 | { |
| 1201 | NV right = SvNV_nomg(svr); |
| 1202 | NV left = SvNV_nomg(svl); |
| 1203 | (void)POPs; |
| 1204 | |
| 1205 | #if defined(USE_LONG_DOUBLE) && defined(HAS_AIX_POWL_NEG_BASE_BUG) |
| 1206 | /* |
| 1207 | We are building perl with long double support and are on an AIX OS |
| 1208 | afflicted with a powl() function that wrongly returns NaNQ for any |
| 1209 | negative base. This was reported to IBM as PMR #23047-379 on |
| 1210 | 03/06/2006. The problem exists in at least the following versions |
| 1211 | of AIX and the libm fileset, and no doubt others as well: |
| 1212 | |
| 1213 | AIX 4.3.3-ML10 bos.adt.libm 4.3.3.50 |
| 1214 | AIX 5.1.0-ML04 bos.adt.libm 5.1.0.29 |
| 1215 | AIX 5.2.0 bos.adt.libm 5.2.0.85 |
| 1216 | |
| 1217 | So, until IBM fixes powl(), we provide the following workaround to |
| 1218 | handle the problem ourselves. Our logic is as follows: for |
| 1219 | negative bases (left), we use fmod(right, 2) to check if the |
| 1220 | exponent is an odd or even integer: |
| 1221 | |
| 1222 | - if odd, powl(left, right) == -powl(-left, right) |
| 1223 | - if even, powl(left, right) == powl(-left, right) |
| 1224 | |
| 1225 | If the exponent is not an integer, the result is rightly NaNQ, so |
| 1226 | we just return that (as NV_NAN). |
| 1227 | */ |
| 1228 | |
| 1229 | if (left < 0.0) { |
| 1230 | NV mod2 = Perl_fmod( right, 2.0 ); |
| 1231 | if (mod2 == 1.0 || mod2 == -1.0) { /* odd integer */ |
| 1232 | SETn( -Perl_pow( -left, right) ); |
| 1233 | } else if (mod2 == 0.0) { /* even integer */ |
| 1234 | SETn( Perl_pow( -left, right) ); |
| 1235 | } else { /* fractional power */ |
| 1236 | SETn( NV_NAN ); |
| 1237 | } |
| 1238 | } else { |
| 1239 | SETn( Perl_pow( left, right) ); |
| 1240 | } |
| 1241 | #else |
| 1242 | SETn( Perl_pow( left, right) ); |
| 1243 | #endif /* HAS_AIX_POWL_NEG_BASE_BUG */ |
| 1244 | |
| 1245 | #ifdef PERL_PRESERVE_IVUV |
| 1246 | if (is_int) |
| 1247 | SvIV_please_nomg(svr); |
| 1248 | #endif |
| 1249 | RETURN; |
| 1250 | } |
| 1251 | } |
| 1252 | |
| 1253 | PP(pp_multiply) |
| 1254 | { |
| 1255 | dVAR; dSP; dATARGET; SV *svl, *svr; |
| 1256 | tryAMAGICbin_MG(mult_amg, AMGf_assign|AMGf_numeric); |
| 1257 | svr = TOPs; |
| 1258 | svl = TOPm1s; |
| 1259 | #ifdef PERL_PRESERVE_IVUV |
| 1260 | SvIV_please_nomg(svr); |
| 1261 | if (SvIOK(svr)) { |
| 1262 | /* Unless the left argument is integer in range we are going to have to |
| 1263 | use NV maths. Hence only attempt to coerce the right argument if |
| 1264 | we know the left is integer. */ |
| 1265 | /* Left operand is defined, so is it IV? */ |
| 1266 | SvIV_please_nomg(svl); |
| 1267 | if (SvIOK(svl)) { |
| 1268 | bool auvok = SvUOK(svl); |
| 1269 | bool buvok = SvUOK(svr); |
| 1270 | const UV topmask = (~ (UV)0) << (4 * sizeof (UV)); |
| 1271 | const UV botmask = ~((~ (UV)0) << (4 * sizeof (UV))); |
| 1272 | UV alow; |
| 1273 | UV ahigh; |
| 1274 | UV blow; |
| 1275 | UV bhigh; |
| 1276 | |
| 1277 | if (auvok) { |
| 1278 | alow = SvUVX(svl); |
| 1279 | } else { |
| 1280 | const IV aiv = SvIVX(svl); |
| 1281 | if (aiv >= 0) { |
| 1282 | alow = aiv; |
| 1283 | auvok = TRUE; /* effectively it's a UV now */ |
| 1284 | } else { |
| 1285 | alow = -aiv; /* abs, auvok == false records sign */ |
| 1286 | } |
| 1287 | } |
| 1288 | if (buvok) { |
| 1289 | blow = SvUVX(svr); |
| 1290 | } else { |
| 1291 | const IV biv = SvIVX(svr); |
| 1292 | if (biv >= 0) { |
| 1293 | blow = biv; |
| 1294 | buvok = TRUE; /* effectively it's a UV now */ |
| 1295 | } else { |
| 1296 | blow = -biv; /* abs, buvok == false records sign */ |
| 1297 | } |
| 1298 | } |
| 1299 | |
| 1300 | /* If this does sign extension on unsigned it's time for plan B */ |
| 1301 | ahigh = alow >> (4 * sizeof (UV)); |
| 1302 | alow &= botmask; |
| 1303 | bhigh = blow >> (4 * sizeof (UV)); |
| 1304 | blow &= botmask; |
| 1305 | if (ahigh && bhigh) { |
| 1306 | NOOP; |
| 1307 | /* eg 32 bit is at least 0x10000 * 0x10000 == 0x100000000 |
| 1308 | which is overflow. Drop to NVs below. */ |
| 1309 | } else if (!ahigh && !bhigh) { |
| 1310 | /* eg 32 bit is at most 0xFFFF * 0xFFFF == 0xFFFE0001 |
| 1311 | so the unsigned multiply cannot overflow. */ |
| 1312 | const UV product = alow * blow; |
| 1313 | if (auvok == buvok) { |
| 1314 | /* -ve * -ve or +ve * +ve gives a +ve result. */ |
| 1315 | SP--; |
| 1316 | SETu( product ); |
| 1317 | RETURN; |
| 1318 | } else if (product <= (UV)IV_MIN) { |
| 1319 | /* 2s complement assumption that (UV)-IV_MIN is correct. */ |
| 1320 | /* -ve result, which could overflow an IV */ |
| 1321 | SP--; |
| 1322 | SETi( -(IV)product ); |
| 1323 | RETURN; |
| 1324 | } /* else drop to NVs below. */ |
| 1325 | } else { |
| 1326 | /* One operand is large, 1 small */ |
| 1327 | UV product_middle; |
| 1328 | if (bhigh) { |
| 1329 | /* swap the operands */ |
| 1330 | ahigh = bhigh; |
| 1331 | bhigh = blow; /* bhigh now the temp var for the swap */ |
| 1332 | blow = alow; |
| 1333 | alow = bhigh; |
| 1334 | } |
| 1335 | /* now, ((ahigh * blow) << half_UV_len) + (alow * blow) |
| 1336 | multiplies can't overflow. shift can, add can, -ve can. */ |
| 1337 | product_middle = ahigh * blow; |
| 1338 | if (!(product_middle & topmask)) { |
| 1339 | /* OK, (ahigh * blow) won't lose bits when we shift it. */ |
| 1340 | UV product_low; |
| 1341 | product_middle <<= (4 * sizeof (UV)); |
| 1342 | product_low = alow * blow; |
| 1343 | |
| 1344 | /* as for pp_add, UV + something mustn't get smaller. |
| 1345 | IIRC ANSI mandates this wrapping *behaviour* for |
| 1346 | unsigned whatever the actual representation*/ |
| 1347 | product_low += product_middle; |
| 1348 | if (product_low >= product_middle) { |
| 1349 | /* didn't overflow */ |
| 1350 | if (auvok == buvok) { |
| 1351 | /* -ve * -ve or +ve * +ve gives a +ve result. */ |
| 1352 | SP--; |
| 1353 | SETu( product_low ); |
| 1354 | RETURN; |
| 1355 | } else if (product_low <= (UV)IV_MIN) { |
| 1356 | /* 2s complement assumption again */ |
| 1357 | /* -ve result, which could overflow an IV */ |
| 1358 | SP--; |
| 1359 | SETi( -(IV)product_low ); |
| 1360 | RETURN; |
| 1361 | } /* else drop to NVs below. */ |
| 1362 | } |
| 1363 | } /* product_middle too large */ |
| 1364 | } /* ahigh && bhigh */ |
| 1365 | } /* SvIOK(svl) */ |
| 1366 | } /* SvIOK(svr) */ |
| 1367 | #endif |
| 1368 | { |
| 1369 | NV right = SvNV_nomg(svr); |
| 1370 | NV left = SvNV_nomg(svl); |
| 1371 | (void)POPs; |
| 1372 | SETn( left * right ); |
| 1373 | RETURN; |
| 1374 | } |
| 1375 | } |
| 1376 | |
| 1377 | PP(pp_divide) |
| 1378 | { |
| 1379 | dVAR; dSP; dATARGET; SV *svl, *svr; |
| 1380 | tryAMAGICbin_MG(div_amg, AMGf_assign|AMGf_numeric); |
| 1381 | svr = TOPs; |
| 1382 | svl = TOPm1s; |
| 1383 | /* Only try to do UV divide first |
| 1384 | if ((SLOPPYDIVIDE is true) or |
| 1385 | (PERL_PRESERVE_IVUV is true and one or both SV is a UV too large |
| 1386 | to preserve)) |
| 1387 | The assumption is that it is better to use floating point divide |
| 1388 | whenever possible, only doing integer divide first if we can't be sure. |
| 1389 | If NV_PRESERVES_UV is true then we know at compile time that no UV |
| 1390 | can be too large to preserve, so don't need to compile the code to |
| 1391 | test the size of UVs. */ |
| 1392 | |
| 1393 | #ifdef SLOPPYDIVIDE |
| 1394 | # define PERL_TRY_UV_DIVIDE |
| 1395 | /* ensure that 20./5. == 4. */ |
| 1396 | #else |
| 1397 | # ifdef PERL_PRESERVE_IVUV |
| 1398 | # ifndef NV_PRESERVES_UV |
| 1399 | # define PERL_TRY_UV_DIVIDE |
| 1400 | # endif |
| 1401 | # endif |
| 1402 | #endif |
| 1403 | |
| 1404 | #ifdef PERL_TRY_UV_DIVIDE |
| 1405 | SvIV_please_nomg(svr); |
| 1406 | if (SvIOK(svr)) { |
| 1407 | SvIV_please_nomg(svl); |
| 1408 | if (SvIOK(svl)) { |
| 1409 | bool left_non_neg = SvUOK(svl); |
| 1410 | bool right_non_neg = SvUOK(svr); |
| 1411 | UV left; |
| 1412 | UV right; |
| 1413 | |
| 1414 | if (right_non_neg) { |
| 1415 | right = SvUVX(svr); |
| 1416 | } |
| 1417 | else { |
| 1418 | const IV biv = SvIVX(svr); |
| 1419 | if (biv >= 0) { |
| 1420 | right = biv; |
| 1421 | right_non_neg = TRUE; /* effectively it's a UV now */ |
| 1422 | } |
| 1423 | else { |
| 1424 | right = -biv; |
| 1425 | } |
| 1426 | } |
| 1427 | /* historically undef()/0 gives a "Use of uninitialized value" |
| 1428 | warning before dieing, hence this test goes here. |
| 1429 | If it were immediately before the second SvIV_please, then |
| 1430 | DIE() would be invoked before left was even inspected, so |
| 1431 | no inspection would give no warning. */ |
| 1432 | if (right == 0) |
| 1433 | DIE(aTHX_ "Illegal division by zero"); |
| 1434 | |
| 1435 | if (left_non_neg) { |
| 1436 | left = SvUVX(svl); |
| 1437 | } |
| 1438 | else { |
| 1439 | const IV aiv = SvIVX(svl); |
| 1440 | if (aiv >= 0) { |
| 1441 | left = aiv; |
| 1442 | left_non_neg = TRUE; /* effectively it's a UV now */ |
| 1443 | } |
| 1444 | else { |
| 1445 | left = -aiv; |
| 1446 | } |
| 1447 | } |
| 1448 | |
| 1449 | if (left >= right |
| 1450 | #ifdef SLOPPYDIVIDE |
| 1451 | /* For sloppy divide we always attempt integer division. */ |
| 1452 | #else |
| 1453 | /* Otherwise we only attempt it if either or both operands |
| 1454 | would not be preserved by an NV. If both fit in NVs |
| 1455 | we fall through to the NV divide code below. However, |
| 1456 | as left >= right to ensure integer result here, we know that |
| 1457 | we can skip the test on the right operand - right big |
| 1458 | enough not to be preserved can't get here unless left is |
| 1459 | also too big. */ |
| 1460 | |
| 1461 | && (left > ((UV)1 << NV_PRESERVES_UV_BITS)) |
| 1462 | #endif |
| 1463 | ) { |
| 1464 | /* Integer division can't overflow, but it can be imprecise. */ |
| 1465 | const UV result = left / right; |
| 1466 | if (result * right == left) { |
| 1467 | SP--; /* result is valid */ |
| 1468 | if (left_non_neg == right_non_neg) { |
| 1469 | /* signs identical, result is positive. */ |
| 1470 | SETu( result ); |
| 1471 | RETURN; |
| 1472 | } |
| 1473 | /* 2s complement assumption */ |
| 1474 | if (result <= (UV)IV_MIN) |
| 1475 | SETi( -(IV)result ); |
| 1476 | else { |
| 1477 | /* It's exact but too negative for IV. */ |
| 1478 | SETn( -(NV)result ); |
| 1479 | } |
| 1480 | RETURN; |
| 1481 | } /* tried integer divide but it was not an integer result */ |
| 1482 | } /* else (PERL_ABS(result) < 1.0) or (both UVs in range for NV) */ |
| 1483 | } /* left wasn't SvIOK */ |
| 1484 | } /* right wasn't SvIOK */ |
| 1485 | #endif /* PERL_TRY_UV_DIVIDE */ |
| 1486 | { |
| 1487 | NV right = SvNV_nomg(svr); |
| 1488 | NV left = SvNV_nomg(svl); |
| 1489 | (void)POPs;(void)POPs; |
| 1490 | #if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan) |
| 1491 | if (! Perl_isnan(right) && right == 0.0) |
| 1492 | #else |
| 1493 | if (right == 0.0) |
| 1494 | #endif |
| 1495 | DIE(aTHX_ "Illegal division by zero"); |
| 1496 | PUSHn( left / right ); |
| 1497 | RETURN; |
| 1498 | } |
| 1499 | } |
| 1500 | |
| 1501 | PP(pp_modulo) |
| 1502 | { |
| 1503 | dVAR; dSP; dATARGET; |
| 1504 | tryAMAGICbin_MG(modulo_amg, AMGf_assign|AMGf_numeric); |
| 1505 | { |
| 1506 | UV left = 0; |
| 1507 | UV right = 0; |
| 1508 | bool left_neg = FALSE; |
| 1509 | bool right_neg = FALSE; |
| 1510 | bool use_double = FALSE; |
| 1511 | bool dright_valid = FALSE; |
| 1512 | NV dright = 0.0; |
| 1513 | NV dleft = 0.0; |
| 1514 | SV * const svr = TOPs; |
| 1515 | SV * const svl = TOPm1s; |
| 1516 | SvIV_please_nomg(svr); |
| 1517 | if (SvIOK(svr)) { |
| 1518 | right_neg = !SvUOK(svr); |
| 1519 | if (!right_neg) { |
| 1520 | right = SvUVX(svr); |
| 1521 | } else { |
| 1522 | const IV biv = SvIVX(svr); |
| 1523 | if (biv >= 0) { |
| 1524 | right = biv; |
| 1525 | right_neg = FALSE; /* effectively it's a UV now */ |
| 1526 | } else { |
| 1527 | right = -biv; |
| 1528 | } |
| 1529 | } |
| 1530 | } |
| 1531 | else { |
| 1532 | dright = SvNV_nomg(svr); |
| 1533 | right_neg = dright < 0; |
| 1534 | if (right_neg) |
| 1535 | dright = -dright; |
| 1536 | if (dright < UV_MAX_P1) { |
| 1537 | right = U_V(dright); |
| 1538 | dright_valid = TRUE; /* In case we need to use double below. */ |
| 1539 | } else { |
| 1540 | use_double = TRUE; |
| 1541 | } |
| 1542 | } |
| 1543 | |
| 1544 | /* At this point use_double is only true if right is out of range for |
| 1545 | a UV. In range NV has been rounded down to nearest UV and |
| 1546 | use_double false. */ |
| 1547 | SvIV_please_nomg(svl); |
| 1548 | if (!use_double && SvIOK(svl)) { |
| 1549 | if (SvIOK(svl)) { |
| 1550 | left_neg = !SvUOK(svl); |
| 1551 | if (!left_neg) { |
| 1552 | left = SvUVX(svl); |
| 1553 | } else { |
| 1554 | const IV aiv = SvIVX(svl); |
| 1555 | if (aiv >= 0) { |
| 1556 | left = aiv; |
| 1557 | left_neg = FALSE; /* effectively it's a UV now */ |
| 1558 | } else { |
| 1559 | left = -aiv; |
| 1560 | } |
| 1561 | } |
| 1562 | } |
| 1563 | } |
| 1564 | else { |
| 1565 | dleft = SvNV_nomg(svl); |
| 1566 | left_neg = dleft < 0; |
| 1567 | if (left_neg) |
| 1568 | dleft = -dleft; |
| 1569 | |
| 1570 | /* This should be exactly the 5.6 behaviour - if left and right are |
| 1571 | both in range for UV then use U_V() rather than floor. */ |
| 1572 | if (!use_double) { |
| 1573 | if (dleft < UV_MAX_P1) { |
| 1574 | /* right was in range, so is dleft, so use UVs not double. |
| 1575 | */ |
| 1576 | left = U_V(dleft); |
| 1577 | } |
| 1578 | /* left is out of range for UV, right was in range, so promote |
| 1579 | right (back) to double. */ |
| 1580 | else { |
| 1581 | /* The +0.5 is used in 5.6 even though it is not strictly |
| 1582 | consistent with the implicit +0 floor in the U_V() |
| 1583 | inside the #if 1. */ |
| 1584 | dleft = Perl_floor(dleft + 0.5); |
| 1585 | use_double = TRUE; |
| 1586 | if (dright_valid) |
| 1587 | dright = Perl_floor(dright + 0.5); |
| 1588 | else |
| 1589 | dright = right; |
| 1590 | } |
| 1591 | } |
| 1592 | } |
| 1593 | sp -= 2; |
| 1594 | if (use_double) { |
| 1595 | NV dans; |
| 1596 | |
| 1597 | if (!dright) |
| 1598 | DIE(aTHX_ "Illegal modulus zero"); |
| 1599 | |
| 1600 | dans = Perl_fmod(dleft, dright); |
| 1601 | if ((left_neg != right_neg) && dans) |
| 1602 | dans = dright - dans; |
| 1603 | if (right_neg) |
| 1604 | dans = -dans; |
| 1605 | sv_setnv(TARG, dans); |
| 1606 | } |
| 1607 | else { |
| 1608 | UV ans; |
| 1609 | |
| 1610 | if (!right) |
| 1611 | DIE(aTHX_ "Illegal modulus zero"); |
| 1612 | |
| 1613 | ans = left % right; |
| 1614 | if ((left_neg != right_neg) && ans) |
| 1615 | ans = right - ans; |
| 1616 | if (right_neg) { |
| 1617 | /* XXX may warn: unary minus operator applied to unsigned type */ |
| 1618 | /* could change -foo to be (~foo)+1 instead */ |
| 1619 | if (ans <= ~((UV)IV_MAX)+1) |
| 1620 | sv_setiv(TARG, ~ans+1); |
| 1621 | else |
| 1622 | sv_setnv(TARG, -(NV)ans); |
| 1623 | } |
| 1624 | else |
| 1625 | sv_setuv(TARG, ans); |
| 1626 | } |
| 1627 | PUSHTARG; |
| 1628 | RETURN; |
| 1629 | } |
| 1630 | } |
| 1631 | |
| 1632 | PP(pp_repeat) |
| 1633 | { |
| 1634 | dVAR; dSP; dATARGET; |
| 1635 | register IV count; |
| 1636 | SV *sv; |
| 1637 | |
| 1638 | if (GIMME == G_ARRAY && PL_op->op_private & OPpREPEAT_DOLIST) { |
| 1639 | /* TODO: think of some way of doing list-repeat overloading ??? */ |
| 1640 | sv = POPs; |
| 1641 | SvGETMAGIC(sv); |
| 1642 | } |
| 1643 | else { |
| 1644 | tryAMAGICbin_MG(repeat_amg, AMGf_assign); |
| 1645 | sv = POPs; |
| 1646 | } |
| 1647 | |
| 1648 | if (SvIOKp(sv)) { |
| 1649 | if (SvUOK(sv)) { |
| 1650 | const UV uv = SvUV_nomg(sv); |
| 1651 | if (uv > IV_MAX) |
| 1652 | count = IV_MAX; /* The best we can do? */ |
| 1653 | else |
| 1654 | count = uv; |
| 1655 | } else { |
| 1656 | const IV iv = SvIV_nomg(sv); |
| 1657 | if (iv < 0) |
| 1658 | count = 0; |
| 1659 | else |
| 1660 | count = iv; |
| 1661 | } |
| 1662 | } |
| 1663 | else if (SvNOKp(sv)) { |
| 1664 | const NV nv = SvNV_nomg(sv); |
| 1665 | if (nv < 0.0) |
| 1666 | count = 0; |
| 1667 | else |
| 1668 | count = (IV)nv; |
| 1669 | } |
| 1670 | else |
| 1671 | count = SvIV_nomg(sv); |
| 1672 | |
| 1673 | if (GIMME == G_ARRAY && PL_op->op_private & OPpREPEAT_DOLIST) { |
| 1674 | dMARK; |
| 1675 | static const char oom_list_extend[] = "Out of memory during list extend"; |
| 1676 | const I32 items = SP - MARK; |
| 1677 | const I32 max = items * count; |
| 1678 | |
| 1679 | MEM_WRAP_CHECK_1(max, SV*, oom_list_extend); |
| 1680 | /* Did the max computation overflow? */ |
| 1681 | if (items > 0 && max > 0 && (max < items || max < count)) |
| 1682 | Perl_croak(aTHX_ oom_list_extend); |
| 1683 | MEXTEND(MARK, max); |
| 1684 | if (count > 1) { |
| 1685 | while (SP > MARK) { |
| 1686 | #if 0 |
| 1687 | /* This code was intended to fix 20010809.028: |
| 1688 | |
| 1689 | $x = 'abcd'; |
| 1690 | for (($x =~ /./g) x 2) { |
| 1691 | print chop; # "abcdabcd" expected as output. |
| 1692 | } |
| 1693 | |
| 1694 | * but that change (#11635) broke this code: |
| 1695 | |
| 1696 | $x = [("foo")x2]; # only one "foo" ended up in the anonlist. |
| 1697 | |
| 1698 | * I can't think of a better fix that doesn't introduce |
| 1699 | * an efficiency hit by copying the SVs. The stack isn't |
| 1700 | * refcounted, and mortalisation obviously doesn't |
| 1701 | * Do The Right Thing when the stack has more than |
| 1702 | * one pointer to the same mortal value. |
| 1703 | * .robin. |
| 1704 | */ |
| 1705 | if (*SP) { |
| 1706 | *SP = sv_2mortal(newSVsv(*SP)); |
| 1707 | SvREADONLY_on(*SP); |
| 1708 | } |
| 1709 | #else |
| 1710 | if (*SP) |
| 1711 | SvTEMP_off((*SP)); |
| 1712 | #endif |
| 1713 | SP--; |
| 1714 | } |
| 1715 | MARK++; |
| 1716 | repeatcpy((char*)(MARK + items), (char*)MARK, |
| 1717 | items * sizeof(const SV *), count - 1); |
| 1718 | SP += max; |
| 1719 | } |
| 1720 | else if (count <= 0) |
| 1721 | SP -= items; |
| 1722 | } |
| 1723 | else { /* Note: mark already snarfed by pp_list */ |
| 1724 | SV * const tmpstr = POPs; |
| 1725 | STRLEN len; |
| 1726 | bool isutf; |
| 1727 | static const char oom_string_extend[] = |
| 1728 | "Out of memory during string extend"; |
| 1729 | |
| 1730 | if (TARG != tmpstr) |
| 1731 | sv_setsv_nomg(TARG, tmpstr); |
| 1732 | SvPV_force_nomg(TARG, len); |
| 1733 | isutf = DO_UTF8(TARG); |
| 1734 | if (count != 1) { |
| 1735 | if (count < 1) |
| 1736 | SvCUR_set(TARG, 0); |
| 1737 | else { |
| 1738 | const STRLEN max = (UV)count * len; |
| 1739 | if (len > MEM_SIZE_MAX / count) |
| 1740 | Perl_croak(aTHX_ oom_string_extend); |
| 1741 | MEM_WRAP_CHECK_1(max, char, oom_string_extend); |
| 1742 | SvGROW(TARG, max + 1); |
| 1743 | repeatcpy(SvPVX(TARG) + len, SvPVX(TARG), len, count - 1); |
| 1744 | SvCUR_set(TARG, SvCUR(TARG) * count); |
| 1745 | } |
| 1746 | *SvEND(TARG) = '\0'; |
| 1747 | } |
| 1748 | if (isutf) |
| 1749 | (void)SvPOK_only_UTF8(TARG); |
| 1750 | else |
| 1751 | (void)SvPOK_only(TARG); |
| 1752 | |
| 1753 | if (PL_op->op_private & OPpREPEAT_DOLIST) { |
| 1754 | /* The parser saw this as a list repeat, and there |
| 1755 | are probably several items on the stack. But we're |
| 1756 | in scalar context, and there's no pp_list to save us |
| 1757 | now. So drop the rest of the items -- robin@kitsite.com |
| 1758 | */ |
| 1759 | dMARK; |
| 1760 | SP = MARK; |
| 1761 | } |
| 1762 | PUSHTARG; |
| 1763 | } |
| 1764 | RETURN; |
| 1765 | } |
| 1766 | |
| 1767 | PP(pp_subtract) |
| 1768 | { |
| 1769 | dVAR; dSP; dATARGET; bool useleft; SV *svl, *svr; |
| 1770 | tryAMAGICbin_MG(subtr_amg, AMGf_assign|AMGf_numeric); |
| 1771 | svr = TOPs; |
| 1772 | svl = TOPm1s; |
| 1773 | useleft = USE_LEFT(svl); |
| 1774 | #ifdef PERL_PRESERVE_IVUV |
| 1775 | /* See comments in pp_add (in pp_hot.c) about Overflow, and how |
| 1776 | "bad things" happen if you rely on signed integers wrapping. */ |
| 1777 | SvIV_please_nomg(svr); |
| 1778 | if (SvIOK(svr)) { |
| 1779 | /* Unless the left argument is integer in range we are going to have to |
| 1780 | use NV maths. Hence only attempt to coerce the right argument if |
| 1781 | we know the left is integer. */ |
| 1782 | register UV auv = 0; |
| 1783 | bool auvok = FALSE; |
| 1784 | bool a_valid = 0; |
| 1785 | |
| 1786 | if (!useleft) { |
| 1787 | auv = 0; |
| 1788 | a_valid = auvok = 1; |
| 1789 | /* left operand is undef, treat as zero. */ |
| 1790 | } else { |
| 1791 | /* Left operand is defined, so is it IV? */ |
| 1792 | SvIV_please_nomg(svl); |
| 1793 | if (SvIOK(svl)) { |
| 1794 | if ((auvok = SvUOK(svl))) |
| 1795 | auv = SvUVX(svl); |
| 1796 | else { |
| 1797 | register const IV aiv = SvIVX(svl); |
| 1798 | if (aiv >= 0) { |
| 1799 | auv = aiv; |
| 1800 | auvok = 1; /* Now acting as a sign flag. */ |
| 1801 | } else { /* 2s complement assumption for IV_MIN */ |
| 1802 | auv = (UV)-aiv; |
| 1803 | } |
| 1804 | } |
| 1805 | a_valid = 1; |
| 1806 | } |
| 1807 | } |
| 1808 | if (a_valid) { |
| 1809 | bool result_good = 0; |
| 1810 | UV result; |
| 1811 | register UV buv; |
| 1812 | bool buvok = SvUOK(svr); |
| 1813 | |
| 1814 | if (buvok) |
| 1815 | buv = SvUVX(svr); |
| 1816 | else { |
| 1817 | register const IV biv = SvIVX(svr); |
| 1818 | if (biv >= 0) { |
| 1819 | buv = biv; |
| 1820 | buvok = 1; |
| 1821 | } else |
| 1822 | buv = (UV)-biv; |
| 1823 | } |
| 1824 | /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve, |
| 1825 | else "IV" now, independent of how it came in. |
| 1826 | if a, b represents positive, A, B negative, a maps to -A etc |
| 1827 | a - b => (a - b) |
| 1828 | A - b => -(a + b) |
| 1829 | a - B => (a + b) |
| 1830 | A - B => -(a - b) |
| 1831 | all UV maths. negate result if A negative. |
| 1832 | subtract if signs same, add if signs differ. */ |
| 1833 | |
| 1834 | if (auvok ^ buvok) { |
| 1835 | /* Signs differ. */ |
| 1836 | result = auv + buv; |
| 1837 | if (result >= auv) |
| 1838 | result_good = 1; |
| 1839 | } else { |
| 1840 | /* Signs same */ |
| 1841 | if (auv >= buv) { |
| 1842 | result = auv - buv; |
| 1843 | /* Must get smaller */ |
| 1844 | if (result <= auv) |
| 1845 | result_good = 1; |
| 1846 | } else { |
| 1847 | result = buv - auv; |
| 1848 | if (result <= buv) { |
| 1849 | /* result really should be -(auv-buv). as its negation |
| 1850 | of true value, need to swap our result flag */ |
| 1851 | auvok = !auvok; |
| 1852 | result_good = 1; |
| 1853 | } |
| 1854 | } |
| 1855 | } |
| 1856 | if (result_good) { |
| 1857 | SP--; |
| 1858 | if (auvok) |
| 1859 | SETu( result ); |
| 1860 | else { |
| 1861 | /* Negate result */ |
| 1862 | if (result <= (UV)IV_MIN) |
| 1863 | SETi( -(IV)result ); |
| 1864 | else { |
| 1865 | /* result valid, but out of range for IV. */ |
| 1866 | SETn( -(NV)result ); |
| 1867 | } |
| 1868 | } |
| 1869 | RETURN; |
| 1870 | } /* Overflow, drop through to NVs. */ |
| 1871 | } |
| 1872 | } |
| 1873 | #endif |
| 1874 | { |
| 1875 | NV value = SvNV_nomg(svr); |
| 1876 | (void)POPs; |
| 1877 | |
| 1878 | if (!useleft) { |
| 1879 | /* left operand is undef, treat as zero - value */ |
| 1880 | SETn(-value); |
| 1881 | RETURN; |
| 1882 | } |
| 1883 | SETn( SvNV_nomg(svl) - value ); |
| 1884 | RETURN; |
| 1885 | } |
| 1886 | } |
| 1887 | |
| 1888 | PP(pp_left_shift) |
| 1889 | { |
| 1890 | dVAR; dSP; dATARGET; SV *svl, *svr; |
| 1891 | tryAMAGICbin_MG(lshift_amg, AMGf_assign|AMGf_numeric); |
| 1892 | svr = POPs; |
| 1893 | svl = TOPs; |
| 1894 | { |
| 1895 | const IV shift = SvIV_nomg(svr); |
| 1896 | if (PL_op->op_private & HINT_INTEGER) { |
| 1897 | const IV i = SvIV_nomg(svl); |
| 1898 | SETi(i << shift); |
| 1899 | } |
| 1900 | else { |
| 1901 | const UV u = SvUV_nomg(svl); |
| 1902 | SETu(u << shift); |
| 1903 | } |
| 1904 | RETURN; |
| 1905 | } |
| 1906 | } |
| 1907 | |
| 1908 | PP(pp_right_shift) |
| 1909 | { |
| 1910 | dVAR; dSP; dATARGET; SV *svl, *svr; |
| 1911 | tryAMAGICbin_MG(rshift_amg, AMGf_assign|AMGf_numeric); |
| 1912 | svr = POPs; |
| 1913 | svl = TOPs; |
| 1914 | { |
| 1915 | const IV shift = SvIV_nomg(svr); |
| 1916 | if (PL_op->op_private & HINT_INTEGER) { |
| 1917 | const IV i = SvIV_nomg(svl); |
| 1918 | SETi(i >> shift); |
| 1919 | } |
| 1920 | else { |
| 1921 | const UV u = SvUV_nomg(svl); |
| 1922 | SETu(u >> shift); |
| 1923 | } |
| 1924 | RETURN; |
| 1925 | } |
| 1926 | } |
| 1927 | |
| 1928 | PP(pp_lt) |
| 1929 | { |
| 1930 | dVAR; dSP; |
| 1931 | SV *left, *right; |
| 1932 | |
| 1933 | tryAMAGICbin_MG(lt_amg, AMGf_set|AMGf_numeric); |
| 1934 | right = POPs; |
| 1935 | left = TOPs; |
| 1936 | SETs(boolSV( |
| 1937 | (SvIOK_notUV(left) && SvIOK_notUV(right)) |
| 1938 | ? (SvIVX(left) < SvIVX(right)) |
| 1939 | : (do_ncmp(left, right) == -1) |
| 1940 | )); |
| 1941 | RETURN; |
| 1942 | } |
| 1943 | |
| 1944 | PP(pp_gt) |
| 1945 | { |
| 1946 | dVAR; dSP; |
| 1947 | SV *left, *right; |
| 1948 | |
| 1949 | tryAMAGICbin_MG(gt_amg, AMGf_set|AMGf_numeric); |
| 1950 | right = POPs; |
| 1951 | left = TOPs; |
| 1952 | SETs(boolSV( |
| 1953 | (SvIOK_notUV(left) && SvIOK_notUV(right)) |
| 1954 | ? (SvIVX(left) > SvIVX(right)) |
| 1955 | : (do_ncmp(left, right) == 1) |
| 1956 | )); |
| 1957 | RETURN; |
| 1958 | } |
| 1959 | |
| 1960 | PP(pp_le) |
| 1961 | { |
| 1962 | dVAR; dSP; |
| 1963 | SV *left, *right; |
| 1964 | |
| 1965 | tryAMAGICbin_MG(le_amg, AMGf_set|AMGf_numeric); |
| 1966 | right = POPs; |
| 1967 | left = TOPs; |
| 1968 | SETs(boolSV( |
| 1969 | (SvIOK_notUV(left) && SvIOK_notUV(right)) |
| 1970 | ? (SvIVX(left) <= SvIVX(right)) |
| 1971 | : (do_ncmp(left, right) <= 0) |
| 1972 | )); |
| 1973 | RETURN; |
| 1974 | } |
| 1975 | |
| 1976 | PP(pp_ge) |
| 1977 | { |
| 1978 | dVAR; dSP; |
| 1979 | SV *left, *right; |
| 1980 | |
| 1981 | tryAMAGICbin_MG(ge_amg, AMGf_set|AMGf_numeric); |
| 1982 | right = POPs; |
| 1983 | left = TOPs; |
| 1984 | SETs(boolSV( |
| 1985 | (SvIOK_notUV(left) && SvIOK_notUV(right)) |
| 1986 | ? (SvIVX(left) >= SvIVX(right)) |
| 1987 | : ( (do_ncmp(left, right) & 2) == 0) |
| 1988 | )); |
| 1989 | RETURN; |
| 1990 | } |
| 1991 | |
| 1992 | PP(pp_ne) |
| 1993 | { |
| 1994 | dVAR; dSP; |
| 1995 | SV *left, *right; |
| 1996 | |
| 1997 | tryAMAGICbin_MG(ne_amg, AMGf_set|AMGf_numeric); |
| 1998 | right = POPs; |
| 1999 | left = TOPs; |
| 2000 | SETs(boolSV( |
| 2001 | (SvIOK_notUV(left) && SvIOK_notUV(right)) |
| 2002 | ? (SvIVX(left) != SvIVX(right)) |
| 2003 | : (do_ncmp(left, right) != 0) |
| 2004 | )); |
| 2005 | RETURN; |
| 2006 | } |
| 2007 | |
| 2008 | /* compare left and right SVs. Returns: |
| 2009 | * -1: < |
| 2010 | * 0: == |
| 2011 | * 1: > |
| 2012 | * 2: left or right was a NaN |
| 2013 | */ |
| 2014 | I32 |
| 2015 | Perl_do_ncmp(pTHX_ SV* const left, SV * const right) |
| 2016 | { |
| 2017 | dVAR; |
| 2018 | |
| 2019 | PERL_ARGS_ASSERT_DO_NCMP; |
| 2020 | #ifdef PERL_PRESERVE_IVUV |
| 2021 | SvIV_please_nomg(right); |
| 2022 | /* Fortunately it seems NaN isn't IOK */ |
| 2023 | if (SvIOK(right)) { |
| 2024 | SvIV_please_nomg(left); |
| 2025 | if (SvIOK(left)) { |
| 2026 | if (!SvUOK(left)) { |
| 2027 | const IV leftiv = SvIVX(left); |
| 2028 | if (!SvUOK(right)) { |
| 2029 | /* ## IV <=> IV ## */ |
| 2030 | const IV rightiv = SvIVX(right); |
| 2031 | return (leftiv > rightiv) - (leftiv < rightiv); |
| 2032 | } |
| 2033 | /* ## IV <=> UV ## */ |
| 2034 | if (leftiv < 0) |
| 2035 | /* As (b) is a UV, it's >=0, so it must be < */ |
| 2036 | return -1; |
| 2037 | { |
| 2038 | const UV rightuv = SvUVX(right); |
| 2039 | return ((UV)leftiv > rightuv) - ((UV)leftiv < rightuv); |
| 2040 | } |
| 2041 | } |
| 2042 | |
| 2043 | if (SvUOK(right)) { |
| 2044 | /* ## UV <=> UV ## */ |
| 2045 | const UV leftuv = SvUVX(left); |
| 2046 | const UV rightuv = SvUVX(right); |
| 2047 | return (leftuv > rightuv) - (leftuv < rightuv); |
| 2048 | } |
| 2049 | /* ## UV <=> IV ## */ |
| 2050 | { |
| 2051 | const IV rightiv = SvIVX(right); |
| 2052 | if (rightiv < 0) |
| 2053 | /* As (a) is a UV, it's >=0, so it cannot be < */ |
| 2054 | return 1; |
| 2055 | { |
| 2056 | const UV leftuv = SvUVX(left); |
| 2057 | return (leftuv > (UV)rightiv) - (leftuv < (UV)rightiv); |
| 2058 | } |
| 2059 | } |
| 2060 | /* NOTREACHED */ |
| 2061 | } |
| 2062 | } |
| 2063 | #endif |
| 2064 | { |
| 2065 | NV const rnv = SvNV_nomg(right); |
| 2066 | NV const lnv = SvNV_nomg(left); |
| 2067 | |
| 2068 | #if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan) |
| 2069 | if (Perl_isnan(lnv) || Perl_isnan(rnv)) { |
| 2070 | return 2; |
| 2071 | } |
| 2072 | return (lnv > rnv) - (lnv < rnv); |
| 2073 | #else |
| 2074 | if (lnv < rnv) |
| 2075 | return -1; |
| 2076 | if (lnv > rnv) |
| 2077 | return 1; |
| 2078 | if (lnv == rnv) |
| 2079 | return 0; |
| 2080 | return 2; |
| 2081 | #endif |
| 2082 | } |
| 2083 | } |
| 2084 | |
| 2085 | |
| 2086 | PP(pp_ncmp) |
| 2087 | { |
| 2088 | dVAR; dSP; |
| 2089 | SV *left, *right; |
| 2090 | I32 value; |
| 2091 | tryAMAGICbin_MG(ncmp_amg, AMGf_numeric); |
| 2092 | right = POPs; |
| 2093 | left = TOPs; |
| 2094 | value = do_ncmp(left, right); |
| 2095 | if (value == 2) { |
| 2096 | SETs(&PL_sv_undef); |
| 2097 | } |
| 2098 | else { |
| 2099 | dTARGET; |
| 2100 | SETi(value); |
| 2101 | } |
| 2102 | RETURN; |
| 2103 | } |
| 2104 | |
| 2105 | PP(pp_sle) |
| 2106 | { |
| 2107 | dVAR; dSP; |
| 2108 | |
| 2109 | int amg_type = sle_amg; |
| 2110 | int multiplier = 1; |
| 2111 | int rhs = 1; |
| 2112 | |
| 2113 | switch (PL_op->op_type) { |
| 2114 | case OP_SLT: |
| 2115 | amg_type = slt_amg; |
| 2116 | /* cmp < 0 */ |
| 2117 | rhs = 0; |
| 2118 | break; |
| 2119 | case OP_SGT: |
| 2120 | amg_type = sgt_amg; |
| 2121 | /* cmp > 0 */ |
| 2122 | multiplier = -1; |
| 2123 | rhs = 0; |
| 2124 | break; |
| 2125 | case OP_SGE: |
| 2126 | amg_type = sge_amg; |
| 2127 | /* cmp >= 0 */ |
| 2128 | multiplier = -1; |
| 2129 | break; |
| 2130 | } |
| 2131 | |
| 2132 | tryAMAGICbin_MG(amg_type, AMGf_set); |
| 2133 | { |
| 2134 | dPOPTOPssrl; |
| 2135 | const int cmp = (IN_LOCALE_RUNTIME |
| 2136 | ? sv_cmp_locale_flags(left, right, 0) |
| 2137 | : sv_cmp_flags(left, right, 0)); |
| 2138 | SETs(boolSV(cmp * multiplier < rhs)); |
| 2139 | RETURN; |
| 2140 | } |
| 2141 | } |
| 2142 | |
| 2143 | PP(pp_seq) |
| 2144 | { |
| 2145 | dVAR; dSP; |
| 2146 | tryAMAGICbin_MG(seq_amg, AMGf_set); |
| 2147 | { |
| 2148 | dPOPTOPssrl; |
| 2149 | SETs(boolSV(sv_eq_flags(left, right, 0))); |
| 2150 | RETURN; |
| 2151 | } |
| 2152 | } |
| 2153 | |
| 2154 | PP(pp_sne) |
| 2155 | { |
| 2156 | dVAR; dSP; |
| 2157 | tryAMAGICbin_MG(sne_amg, AMGf_set); |
| 2158 | { |
| 2159 | dPOPTOPssrl; |
| 2160 | SETs(boolSV(!sv_eq_flags(left, right, 0))); |
| 2161 | RETURN; |
| 2162 | } |
| 2163 | } |
| 2164 | |
| 2165 | PP(pp_scmp) |
| 2166 | { |
| 2167 | dVAR; dSP; dTARGET; |
| 2168 | tryAMAGICbin_MG(scmp_amg, 0); |
| 2169 | { |
| 2170 | dPOPTOPssrl; |
| 2171 | const int cmp = (IN_LOCALE_RUNTIME |
| 2172 | ? sv_cmp_locale_flags(left, right, 0) |
| 2173 | : sv_cmp_flags(left, right, 0)); |
| 2174 | SETi( cmp ); |
| 2175 | RETURN; |
| 2176 | } |
| 2177 | } |
| 2178 | |
| 2179 | PP(pp_bit_and) |
| 2180 | { |
| 2181 | dVAR; dSP; dATARGET; |
| 2182 | tryAMAGICbin_MG(band_amg, AMGf_assign); |
| 2183 | { |
| 2184 | dPOPTOPssrl; |
| 2185 | if (SvNIOKp(left) || SvNIOKp(right)) { |
| 2186 | const bool left_ro_nonnum = !SvNIOKp(left) && SvREADONLY(left); |
| 2187 | const bool right_ro_nonnum = !SvNIOKp(right) && SvREADONLY(right); |
| 2188 | if (PL_op->op_private & HINT_INTEGER) { |
| 2189 | const IV i = SvIV_nomg(left) & SvIV_nomg(right); |
| 2190 | SETi(i); |
| 2191 | } |
| 2192 | else { |
| 2193 | const UV u = SvUV_nomg(left) & SvUV_nomg(right); |
| 2194 | SETu(u); |
| 2195 | } |
| 2196 | if (left_ro_nonnum) SvNIOK_off(left); |
| 2197 | if (right_ro_nonnum) SvNIOK_off(right); |
| 2198 | } |
| 2199 | else { |
| 2200 | do_vop(PL_op->op_type, TARG, left, right); |
| 2201 | SETTARG; |
| 2202 | } |
| 2203 | RETURN; |
| 2204 | } |
| 2205 | } |
| 2206 | |
| 2207 | PP(pp_bit_or) |
| 2208 | { |
| 2209 | dVAR; dSP; dATARGET; |
| 2210 | const int op_type = PL_op->op_type; |
| 2211 | |
| 2212 | tryAMAGICbin_MG((op_type == OP_BIT_OR ? bor_amg : bxor_amg), AMGf_assign); |
| 2213 | { |
| 2214 | dPOPTOPssrl; |
| 2215 | if (SvNIOKp(left) || SvNIOKp(right)) { |
| 2216 | const bool left_ro_nonnum = !SvNIOKp(left) && SvREADONLY(left); |
| 2217 | const bool right_ro_nonnum = !SvNIOKp(right) && SvREADONLY(right); |
| 2218 | if (PL_op->op_private & HINT_INTEGER) { |
| 2219 | const IV l = (USE_LEFT(left) ? SvIV_nomg(left) : 0); |
| 2220 | const IV r = SvIV_nomg(right); |
| 2221 | const IV result = op_type == OP_BIT_OR ? (l | r) : (l ^ r); |
| 2222 | SETi(result); |
| 2223 | } |
| 2224 | else { |
| 2225 | const UV l = (USE_LEFT(left) ? SvUV_nomg(left) : 0); |
| 2226 | const UV r = SvUV_nomg(right); |
| 2227 | const UV result = op_type == OP_BIT_OR ? (l | r) : (l ^ r); |
| 2228 | SETu(result); |
| 2229 | } |
| 2230 | if (left_ro_nonnum) SvNIOK_off(left); |
| 2231 | if (right_ro_nonnum) SvNIOK_off(right); |
| 2232 | } |
| 2233 | else { |
| 2234 | do_vop(op_type, TARG, left, right); |
| 2235 | SETTARG; |
| 2236 | } |
| 2237 | RETURN; |
| 2238 | } |
| 2239 | } |
| 2240 | |
| 2241 | PP(pp_negate) |
| 2242 | { |
| 2243 | dVAR; dSP; dTARGET; |
| 2244 | tryAMAGICun_MG(neg_amg, AMGf_numeric); |
| 2245 | { |
| 2246 | SV * const sv = TOPs; |
| 2247 | const int flags = SvFLAGS(sv); |
| 2248 | |
| 2249 | if( !SvNIOK( sv ) && looks_like_number( sv ) ){ |
| 2250 | SvIV_please( sv ); |
| 2251 | } |
| 2252 | |
| 2253 | if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) { |
| 2254 | /* It's publicly an integer, or privately an integer-not-float */ |
| 2255 | oops_its_an_int: |
| 2256 | if (SvIsUV(sv)) { |
| 2257 | if (SvIVX(sv) == IV_MIN) { |
| 2258 | /* 2s complement assumption. */ |
| 2259 | SETi(SvIVX(sv)); /* special case: -((UV)IV_MAX+1) == IV_MIN */ |
| 2260 | RETURN; |
| 2261 | } |
| 2262 | else if (SvUVX(sv) <= IV_MAX) { |
| 2263 | SETi(-SvIVX(sv)); |
| 2264 | RETURN; |
| 2265 | } |
| 2266 | } |
| 2267 | else if (SvIVX(sv) != IV_MIN) { |
| 2268 | SETi(-SvIVX(sv)); |
| 2269 | RETURN; |
| 2270 | } |
| 2271 | #ifdef PERL_PRESERVE_IVUV |
| 2272 | else { |
| 2273 | SETu((UV)IV_MIN); |
| 2274 | RETURN; |
| 2275 | } |
| 2276 | #endif |
| 2277 | } |
| 2278 | if (SvNIOKp(sv)) |
| 2279 | SETn(-SvNV_nomg(sv)); |
| 2280 | else if (SvPOKp(sv)) { |
| 2281 | STRLEN len; |
| 2282 | const char * const s = SvPV_nomg_const(sv, len); |
| 2283 | if (isIDFIRST(*s)) { |
| 2284 | sv_setpvs(TARG, "-"); |
| 2285 | sv_catsv(TARG, sv); |
| 2286 | } |
| 2287 | else if (*s == '+' || *s == '-') { |
| 2288 | sv_setsv_nomg(TARG, sv); |
| 2289 | *SvPV_force_nomg(TARG, len) = *s == '-' ? '+' : '-'; |
| 2290 | } |
| 2291 | else if (DO_UTF8(sv)) { |
| 2292 | SvIV_please_nomg(sv); |
| 2293 | if (SvIOK(sv)) |
| 2294 | goto oops_its_an_int; |
| 2295 | if (SvNOK(sv)) |
| 2296 | sv_setnv(TARG, -SvNV_nomg(sv)); |
| 2297 | else { |
| 2298 | sv_setpvs(TARG, "-"); |
| 2299 | sv_catsv(TARG, sv); |
| 2300 | } |
| 2301 | } |
| 2302 | else { |
| 2303 | SvIV_please_nomg(sv); |
| 2304 | if (SvIOK(sv)) |
| 2305 | goto oops_its_an_int; |
| 2306 | sv_setnv(TARG, -SvNV_nomg(sv)); |
| 2307 | } |
| 2308 | SETTARG; |
| 2309 | } |
| 2310 | else |
| 2311 | SETn(-SvNV_nomg(sv)); |
| 2312 | } |
| 2313 | RETURN; |
| 2314 | } |
| 2315 | |
| 2316 | PP(pp_not) |
| 2317 | { |
| 2318 | dVAR; dSP; |
| 2319 | tryAMAGICun_MG(not_amg, AMGf_set); |
| 2320 | *PL_stack_sp = boolSV(!SvTRUE_nomg(*PL_stack_sp)); |
| 2321 | return NORMAL; |
| 2322 | } |
| 2323 | |
| 2324 | PP(pp_complement) |
| 2325 | { |
| 2326 | dVAR; dSP; dTARGET; |
| 2327 | tryAMAGICun_MG(compl_amg, AMGf_numeric); |
| 2328 | { |
| 2329 | dTOPss; |
| 2330 | if (SvNIOKp(sv)) { |
| 2331 | if (PL_op->op_private & HINT_INTEGER) { |
| 2332 | const IV i = ~SvIV_nomg(sv); |
| 2333 | SETi(i); |
| 2334 | } |
| 2335 | else { |
| 2336 | const UV u = ~SvUV_nomg(sv); |
| 2337 | SETu(u); |
| 2338 | } |
| 2339 | } |
| 2340 | else { |
| 2341 | register U8 *tmps; |
| 2342 | register I32 anum; |
| 2343 | STRLEN len; |
| 2344 | |
| 2345 | (void)SvPV_nomg_const(sv,len); /* force check for uninit var */ |
| 2346 | sv_setsv_nomg(TARG, sv); |
| 2347 | tmps = (U8*)SvPV_force_nomg(TARG, len); |
| 2348 | anum = len; |
| 2349 | if (SvUTF8(TARG)) { |
| 2350 | /* Calculate exact length, let's not estimate. */ |
| 2351 | STRLEN targlen = 0; |
| 2352 | STRLEN l; |
| 2353 | UV nchar = 0; |
| 2354 | UV nwide = 0; |
| 2355 | U8 * const send = tmps + len; |
| 2356 | U8 * const origtmps = tmps; |
| 2357 | const UV utf8flags = UTF8_ALLOW_ANYUV; |
| 2358 | |
| 2359 | while (tmps < send) { |
| 2360 | const UV c = utf8n_to_uvchr(tmps, send-tmps, &l, utf8flags); |
| 2361 | tmps += l; |
| 2362 | targlen += UNISKIP(~c); |
| 2363 | nchar++; |
| 2364 | if (c > 0xff) |
| 2365 | nwide++; |
| 2366 | } |
| 2367 | |
| 2368 | /* Now rewind strings and write them. */ |
| 2369 | tmps = origtmps; |
| 2370 | |
| 2371 | if (nwide) { |
| 2372 | U8 *result; |
| 2373 | U8 *p; |
| 2374 | |
| 2375 | Newx(result, targlen + 1, U8); |
| 2376 | p = result; |
| 2377 | while (tmps < send) { |
| 2378 | const UV c = utf8n_to_uvchr(tmps, send-tmps, &l, utf8flags); |
| 2379 | tmps += l; |
| 2380 | p = uvchr_to_utf8_flags(p, ~c, UNICODE_ALLOW_ANY); |
| 2381 | } |
| 2382 | *p = '\0'; |
| 2383 | sv_usepvn_flags(TARG, (char*)result, targlen, |
| 2384 | SV_HAS_TRAILING_NUL); |
| 2385 | SvUTF8_on(TARG); |
| 2386 | } |
| 2387 | else { |
| 2388 | U8 *result; |
| 2389 | U8 *p; |
| 2390 | |
| 2391 | Newx(result, nchar + 1, U8); |
| 2392 | p = result; |
| 2393 | while (tmps < send) { |
| 2394 | const U8 c = (U8)utf8n_to_uvchr(tmps, send-tmps, &l, utf8flags); |
| 2395 | tmps += l; |
| 2396 | *p++ = ~c; |
| 2397 | } |
| 2398 | *p = '\0'; |
| 2399 | sv_usepvn_flags(TARG, (char*)result, nchar, SV_HAS_TRAILING_NUL); |
| 2400 | SvUTF8_off(TARG); |
| 2401 | } |
| 2402 | SETTARG; |
| 2403 | RETURN; |
| 2404 | } |
| 2405 | #ifdef LIBERAL |
| 2406 | { |
| 2407 | register long *tmpl; |
| 2408 | for ( ; anum && (unsigned long)tmps % sizeof(long); anum--, tmps++) |
| 2409 | *tmps = ~*tmps; |
| 2410 | tmpl = (long*)tmps; |
| 2411 | for ( ; anum >= (I32)sizeof(long); anum -= (I32)sizeof(long), tmpl++) |
| 2412 | *tmpl = ~*tmpl; |
| 2413 | tmps = (U8*)tmpl; |
| 2414 | } |
| 2415 | #endif |
| 2416 | for ( ; anum > 0; anum--, tmps++) |
| 2417 | *tmps = ~*tmps; |
| 2418 | SETTARG; |
| 2419 | } |
| 2420 | RETURN; |
| 2421 | } |
| 2422 | } |
| 2423 | |
| 2424 | /* integer versions of some of the above */ |
| 2425 | |
| 2426 | PP(pp_i_multiply) |
| 2427 | { |
| 2428 | dVAR; dSP; dATARGET; |
| 2429 | tryAMAGICbin_MG(mult_amg, AMGf_assign); |
| 2430 | { |
| 2431 | dPOPTOPiirl_nomg; |
| 2432 | SETi( left * right ); |
| 2433 | RETURN; |
| 2434 | } |
| 2435 | } |
| 2436 | |
| 2437 | PP(pp_i_divide) |
| 2438 | { |
| 2439 | IV num; |
| 2440 | dVAR; dSP; dATARGET; |
| 2441 | tryAMAGICbin_MG(div_amg, AMGf_assign); |
| 2442 | { |
| 2443 | dPOPTOPssrl; |
| 2444 | IV value = SvIV_nomg(right); |
| 2445 | if (value == 0) |
| 2446 | DIE(aTHX_ "Illegal division by zero"); |
| 2447 | num = SvIV_nomg(left); |
| 2448 | |
| 2449 | /* avoid FPE_INTOVF on some platforms when num is IV_MIN */ |
| 2450 | if (value == -1) |
| 2451 | value = - num; |
| 2452 | else |
| 2453 | value = num / value; |
| 2454 | SETi(value); |
| 2455 | RETURN; |
| 2456 | } |
| 2457 | } |
| 2458 | |
| 2459 | #if defined(__GLIBC__) && IVSIZE == 8 |
| 2460 | STATIC |
| 2461 | PP(pp_i_modulo_0) |
| 2462 | #else |
| 2463 | PP(pp_i_modulo) |
| 2464 | #endif |
| 2465 | { |
| 2466 | /* This is the vanilla old i_modulo. */ |
| 2467 | dVAR; dSP; dATARGET; |
| 2468 | tryAMAGICbin_MG(modulo_amg, AMGf_assign); |
| 2469 | { |
| 2470 | dPOPTOPiirl_nomg; |
| 2471 | if (!right) |
| 2472 | DIE(aTHX_ "Illegal modulus zero"); |
| 2473 | /* avoid FPE_INTOVF on some platforms when left is IV_MIN */ |
| 2474 | if (right == -1) |
| 2475 | SETi( 0 ); |
| 2476 | else |
| 2477 | SETi( left % right ); |
| 2478 | RETURN; |
| 2479 | } |
| 2480 | } |
| 2481 | |
| 2482 | #if defined(__GLIBC__) && IVSIZE == 8 |
| 2483 | STATIC |
| 2484 | PP(pp_i_modulo_1) |
| 2485 | |
| 2486 | { |
| 2487 | /* This is the i_modulo with the workaround for the _moddi3 bug |
| 2488 | * in (at least) glibc 2.2.5 (the PERL_ABS() the workaround). |
| 2489 | * See below for pp_i_modulo. */ |
| 2490 | dVAR; dSP; dATARGET; |
| 2491 | tryAMAGICbin_MG(modulo_amg, AMGf_assign); |
| 2492 | { |
| 2493 | dPOPTOPiirl_nomg; |
| 2494 | if (!right) |
| 2495 | DIE(aTHX_ "Illegal modulus zero"); |
| 2496 | /* avoid FPE_INTOVF on some platforms when left is IV_MIN */ |
| 2497 | if (right == -1) |
| 2498 | SETi( 0 ); |
| 2499 | else |
| 2500 | SETi( left % PERL_ABS(right) ); |
| 2501 | RETURN; |
| 2502 | } |
| 2503 | } |
| 2504 | |
| 2505 | PP(pp_i_modulo) |
| 2506 | { |
| 2507 | dVAR; dSP; dATARGET; |
| 2508 | tryAMAGICbin_MG(modulo_amg, AMGf_assign); |
| 2509 | { |
| 2510 | dPOPTOPiirl_nomg; |
| 2511 | if (!right) |
| 2512 | DIE(aTHX_ "Illegal modulus zero"); |
| 2513 | /* The assumption is to use hereafter the old vanilla version... */ |
| 2514 | PL_op->op_ppaddr = |
| 2515 | PL_ppaddr[OP_I_MODULO] = |
| 2516 | Perl_pp_i_modulo_0; |
| 2517 | /* .. but if we have glibc, we might have a buggy _moddi3 |
| 2518 | * (at least glicb 2.2.5 is known to have this bug), in other |
| 2519 | * words our integer modulus with negative quad as the second |
| 2520 | * argument might be broken. Test for this and re-patch the |
| 2521 | * opcode dispatch table if that is the case, remembering to |
| 2522 | * also apply the workaround so that this first round works |
| 2523 | * right, too. See [perl #9402] for more information. */ |
| 2524 | { |
| 2525 | IV l = 3; |
| 2526 | IV r = -10; |
| 2527 | /* Cannot do this check with inlined IV constants since |
| 2528 | * that seems to work correctly even with the buggy glibc. */ |
| 2529 | if (l % r == -3) { |
| 2530 | /* Yikes, we have the bug. |
| 2531 | * Patch in the workaround version. */ |
| 2532 | PL_op->op_ppaddr = |
| 2533 | PL_ppaddr[OP_I_MODULO] = |
| 2534 | &Perl_pp_i_modulo_1; |
| 2535 | /* Make certain we work right this time, too. */ |
| 2536 | right = PERL_ABS(right); |
| 2537 | } |
| 2538 | } |
| 2539 | /* avoid FPE_INTOVF on some platforms when left is IV_MIN */ |
| 2540 | if (right == -1) |
| 2541 | SETi( 0 ); |
| 2542 | else |
| 2543 | SETi( left % right ); |
| 2544 | RETURN; |
| 2545 | } |
| 2546 | } |
| 2547 | #endif |
| 2548 | |
| 2549 | PP(pp_i_add) |
| 2550 | { |
| 2551 | dVAR; dSP; dATARGET; |
| 2552 | tryAMAGICbin_MG(add_amg, AMGf_assign); |
| 2553 | { |
| 2554 | dPOPTOPiirl_ul_nomg; |
| 2555 | SETi( left + right ); |
| 2556 | RETURN; |
| 2557 | } |
| 2558 | } |
| 2559 | |
| 2560 | PP(pp_i_subtract) |
| 2561 | { |
| 2562 | dVAR; dSP; dATARGET; |
| 2563 | tryAMAGICbin_MG(subtr_amg, AMGf_assign); |
| 2564 | { |
| 2565 | dPOPTOPiirl_ul_nomg; |
| 2566 | SETi( left - right ); |
| 2567 | RETURN; |
| 2568 | } |
| 2569 | } |
| 2570 | |
| 2571 | PP(pp_i_lt) |
| 2572 | { |
| 2573 | dVAR; dSP; |
| 2574 | tryAMAGICbin_MG(lt_amg, AMGf_set); |
| 2575 | { |
| 2576 | dPOPTOPiirl_nomg; |
| 2577 | SETs(boolSV(left < right)); |
| 2578 | RETURN; |
| 2579 | } |
| 2580 | } |
| 2581 | |
| 2582 | PP(pp_i_gt) |
| 2583 | { |
| 2584 | dVAR; dSP; |
| 2585 | tryAMAGICbin_MG(gt_amg, AMGf_set); |
| 2586 | { |
| 2587 | dPOPTOPiirl_nomg; |
| 2588 | SETs(boolSV(left > right)); |
| 2589 | RETURN; |
| 2590 | } |
| 2591 | } |
| 2592 | |
| 2593 | PP(pp_i_le) |
| 2594 | { |
| 2595 | dVAR; dSP; |
| 2596 | tryAMAGICbin_MG(le_amg, AMGf_set); |
| 2597 | { |
| 2598 | dPOPTOPiirl_nomg; |
| 2599 | SETs(boolSV(left <= right)); |
| 2600 | RETURN; |
| 2601 | } |
| 2602 | } |
| 2603 | |
| 2604 | PP(pp_i_ge) |
| 2605 | { |
| 2606 | dVAR; dSP; |
| 2607 | tryAMAGICbin_MG(ge_amg, AMGf_set); |
| 2608 | { |
| 2609 | dPOPTOPiirl_nomg; |
| 2610 | SETs(boolSV(left >= right)); |
| 2611 | RETURN; |
| 2612 | } |
| 2613 | } |
| 2614 | |
| 2615 | PP(pp_i_eq) |
| 2616 | { |
| 2617 | dVAR; dSP; |
| 2618 | tryAMAGICbin_MG(eq_amg, AMGf_set); |
| 2619 | { |
| 2620 | dPOPTOPiirl_nomg; |
| 2621 | SETs(boolSV(left == right)); |
| 2622 | RETURN; |
| 2623 | } |
| 2624 | } |
| 2625 | |
| 2626 | PP(pp_i_ne) |
| 2627 | { |
| 2628 | dVAR; dSP; |
| 2629 | tryAMAGICbin_MG(ne_amg, AMGf_set); |
| 2630 | { |
| 2631 | dPOPTOPiirl_nomg; |
| 2632 | SETs(boolSV(left != right)); |
| 2633 | RETURN; |
| 2634 | } |
| 2635 | } |
| 2636 | |
| 2637 | PP(pp_i_ncmp) |
| 2638 | { |
| 2639 | dVAR; dSP; dTARGET; |
| 2640 | tryAMAGICbin_MG(ncmp_amg, 0); |
| 2641 | { |
| 2642 | dPOPTOPiirl_nomg; |
| 2643 | I32 value; |
| 2644 | |
| 2645 | if (left > right) |
| 2646 | value = 1; |
| 2647 | else if (left < right) |
| 2648 | value = -1; |
| 2649 | else |
| 2650 | value = 0; |
| 2651 | SETi(value); |
| 2652 | RETURN; |
| 2653 | } |
| 2654 | } |
| 2655 | |
| 2656 | PP(pp_i_negate) |
| 2657 | { |
| 2658 | dVAR; dSP; dTARGET; |
| 2659 | tryAMAGICun_MG(neg_amg, 0); |
| 2660 | { |
| 2661 | SV * const sv = TOPs; |
| 2662 | IV const i = SvIV_nomg(sv); |
| 2663 | SETi(-i); |
| 2664 | RETURN; |
| 2665 | } |
| 2666 | } |
| 2667 | |
| 2668 | /* High falutin' math. */ |
| 2669 | |
| 2670 | PP(pp_atan2) |
| 2671 | { |
| 2672 | dVAR; dSP; dTARGET; |
| 2673 | tryAMAGICbin_MG(atan2_amg, 0); |
| 2674 | { |
| 2675 | dPOPTOPnnrl_nomg; |
| 2676 | SETn(Perl_atan2(left, right)); |
| 2677 | RETURN; |
| 2678 | } |
| 2679 | } |
| 2680 | |
| 2681 | PP(pp_sin) |
| 2682 | { |
| 2683 | dVAR; dSP; dTARGET; |
| 2684 | int amg_type = sin_amg; |
| 2685 | const char *neg_report = NULL; |
| 2686 | NV (*func)(NV) = Perl_sin; |
| 2687 | const int op_type = PL_op->op_type; |
| 2688 | |
| 2689 | switch (op_type) { |
| 2690 | case OP_COS: |
| 2691 | amg_type = cos_amg; |
| 2692 | func = Perl_cos; |
| 2693 | break; |
| 2694 | case OP_EXP: |
| 2695 | amg_type = exp_amg; |
| 2696 | func = Perl_exp; |
| 2697 | break; |
| 2698 | case OP_LOG: |
| 2699 | amg_type = log_amg; |
| 2700 | func = Perl_log; |
| 2701 | neg_report = "log"; |
| 2702 | break; |
| 2703 | case OP_SQRT: |
| 2704 | amg_type = sqrt_amg; |
| 2705 | func = Perl_sqrt; |
| 2706 | neg_report = "sqrt"; |
| 2707 | break; |
| 2708 | } |
| 2709 | |
| 2710 | |
| 2711 | tryAMAGICun_MG(amg_type, 0); |
| 2712 | { |
| 2713 | SV * const arg = POPs; |
| 2714 | const NV value = SvNV_nomg(arg); |
| 2715 | if (neg_report) { |
| 2716 | if (op_type == OP_LOG ? (value <= 0.0) : (value < 0.0)) { |
| 2717 | SET_NUMERIC_STANDARD(); |
| 2718 | /* diag_listed_as: Can't take log of %g */ |
| 2719 | DIE(aTHX_ "Can't take %s of %"NVgf, neg_report, value); |
| 2720 | } |
| 2721 | } |
| 2722 | XPUSHn(func(value)); |
| 2723 | RETURN; |
| 2724 | } |
| 2725 | } |
| 2726 | |
| 2727 | /* Support Configure command-line overrides for rand() functions. |
| 2728 | After 5.005, perhaps we should replace this by Configure support |
| 2729 | for drand48(), random(), or rand(). For 5.005, though, maintain |
| 2730 | compatibility by calling rand() but allow the user to override it. |
| 2731 | See INSTALL for details. --Andy Dougherty 15 July 1998 |
| 2732 | */ |
| 2733 | /* Now it's after 5.005, and Configure supports drand48() and random(), |
| 2734 | in addition to rand(). So the overrides should not be needed any more. |
| 2735 | --Jarkko Hietaniemi 27 September 1998 |
| 2736 | */ |
| 2737 | |
| 2738 | #ifndef HAS_DRAND48_PROTO |
| 2739 | extern double drand48 (void); |
| 2740 | #endif |
| 2741 | |
| 2742 | PP(pp_rand) |
| 2743 | { |
| 2744 | dVAR; dSP; dTARGET; |
| 2745 | NV value; |
| 2746 | if (MAXARG < 1) |
| 2747 | value = 1.0; |
| 2748 | else if (!TOPs) { |
| 2749 | value = 1.0; (void)POPs; |
| 2750 | } |
| 2751 | else |
| 2752 | value = POPn; |
| 2753 | if (value == 0.0) |
| 2754 | value = 1.0; |
| 2755 | if (!PL_srand_called) { |
| 2756 | (void)seedDrand01((Rand_seed_t)seed()); |
| 2757 | PL_srand_called = TRUE; |
| 2758 | } |
| 2759 | value *= Drand01(); |
| 2760 | XPUSHn(value); |
| 2761 | RETURN; |
| 2762 | } |
| 2763 | |
| 2764 | PP(pp_srand) |
| 2765 | { |
| 2766 | dVAR; dSP; dTARGET; |
| 2767 | const UV anum = (MAXARG < 1 || (!TOPs && !POPs)) ? seed() : POPu; |
| 2768 | (void)seedDrand01((Rand_seed_t)anum); |
| 2769 | PL_srand_called = TRUE; |
| 2770 | if (anum) |
| 2771 | XPUSHu(anum); |
| 2772 | else { |
| 2773 | /* Historically srand always returned true. We can avoid breaking |
| 2774 | that like this: */ |
| 2775 | sv_setpvs(TARG, "0 but true"); |
| 2776 | XPUSHTARG; |
| 2777 | } |
| 2778 | RETURN; |
| 2779 | } |
| 2780 | |
| 2781 | PP(pp_int) |
| 2782 | { |
| 2783 | dVAR; dSP; dTARGET; |
| 2784 | tryAMAGICun_MG(int_amg, AMGf_numeric); |
| 2785 | { |
| 2786 | SV * const sv = TOPs; |
| 2787 | const IV iv = SvIV_nomg(sv); |
| 2788 | /* XXX it's arguable that compiler casting to IV might be subtly |
| 2789 | different from modf (for numbers inside (IV_MIN,UV_MAX)) in which |
| 2790 | else preferring IV has introduced a subtle behaviour change bug. OTOH |
| 2791 | relying on floating point to be accurate is a bug. */ |
| 2792 | |
| 2793 | if (!SvOK(sv)) { |
| 2794 | SETu(0); |
| 2795 | } |
| 2796 | else if (SvIOK(sv)) { |
| 2797 | if (SvIsUV(sv)) |
| 2798 | SETu(SvUV_nomg(sv)); |
| 2799 | else |
| 2800 | SETi(iv); |
| 2801 | } |
| 2802 | else { |
| 2803 | const NV value = SvNV_nomg(sv); |
| 2804 | if (value >= 0.0) { |
| 2805 | if (value < (NV)UV_MAX + 0.5) { |
| 2806 | SETu(U_V(value)); |
| 2807 | } else { |
| 2808 | SETn(Perl_floor(value)); |
| 2809 | } |
| 2810 | } |
| 2811 | else { |
| 2812 | if (value > (NV)IV_MIN - 0.5) { |
| 2813 | SETi(I_V(value)); |
| 2814 | } else { |
| 2815 | SETn(Perl_ceil(value)); |
| 2816 | } |
| 2817 | } |
| 2818 | } |
| 2819 | } |
| 2820 | RETURN; |
| 2821 | } |
| 2822 | |
| 2823 | PP(pp_abs) |
| 2824 | { |
| 2825 | dVAR; dSP; dTARGET; |
| 2826 | tryAMAGICun_MG(abs_amg, AMGf_numeric); |
| 2827 | { |
| 2828 | SV * const sv = TOPs; |
| 2829 | /* This will cache the NV value if string isn't actually integer */ |
| 2830 | const IV iv = SvIV_nomg(sv); |
| 2831 | |
| 2832 | if (!SvOK(sv)) { |
| 2833 | SETu(0); |
| 2834 | } |
| 2835 | else if (SvIOK(sv)) { |
| 2836 | /* IVX is precise */ |
| 2837 | if (SvIsUV(sv)) { |
| 2838 | SETu(SvUV_nomg(sv)); /* force it to be numeric only */ |
| 2839 | } else { |
| 2840 | if (iv >= 0) { |
| 2841 | SETi(iv); |
| 2842 | } else { |
| 2843 | if (iv != IV_MIN) { |
| 2844 | SETi(-iv); |
| 2845 | } else { |
| 2846 | /* 2s complement assumption. Also, not really needed as |
| 2847 | IV_MIN and -IV_MIN should both be %100...00 and NV-able */ |
| 2848 | SETu(IV_MIN); |
| 2849 | } |
| 2850 | } |
| 2851 | } |
| 2852 | } else{ |
| 2853 | const NV value = SvNV_nomg(sv); |
| 2854 | if (value < 0.0) |
| 2855 | SETn(-value); |
| 2856 | else |
| 2857 | SETn(value); |
| 2858 | } |
| 2859 | } |
| 2860 | RETURN; |
| 2861 | } |
| 2862 | |
| 2863 | PP(pp_oct) |
| 2864 | { |
| 2865 | dVAR; dSP; dTARGET; |
| 2866 | const char *tmps; |
| 2867 | I32 flags = PERL_SCAN_ALLOW_UNDERSCORES; |
| 2868 | STRLEN len; |
| 2869 | NV result_nv; |
| 2870 | UV result_uv; |
| 2871 | SV* const sv = POPs; |
| 2872 | |
| 2873 | tmps = (SvPV_const(sv, len)); |
| 2874 | if (DO_UTF8(sv)) { |
| 2875 | /* If Unicode, try to downgrade |
| 2876 | * If not possible, croak. */ |
| 2877 | SV* const tsv = sv_2mortal(newSVsv(sv)); |
| 2878 | |
| 2879 | SvUTF8_on(tsv); |
| 2880 | sv_utf8_downgrade(tsv, FALSE); |
| 2881 | tmps = SvPV_const(tsv, len); |
| 2882 | } |
| 2883 | if (PL_op->op_type == OP_HEX) |
| 2884 | goto hex; |
| 2885 | |
| 2886 | while (*tmps && len && isSPACE(*tmps)) |
| 2887 | tmps++, len--; |
| 2888 | if (*tmps == '0') |
| 2889 | tmps++, len--; |
| 2890 | if (*tmps == 'x' || *tmps == 'X') { |
| 2891 | hex: |
| 2892 | result_uv = grok_hex (tmps, &len, &flags, &result_nv); |
| 2893 | } |
| 2894 | else if (*tmps == 'b' || *tmps == 'B') |
| 2895 | result_uv = grok_bin (tmps, &len, &flags, &result_nv); |
| 2896 | else |
| 2897 | result_uv = grok_oct (tmps, &len, &flags, &result_nv); |
| 2898 | |
| 2899 | if (flags & PERL_SCAN_GREATER_THAN_UV_MAX) { |
| 2900 | XPUSHn(result_nv); |
| 2901 | } |
| 2902 | else { |
| 2903 | XPUSHu(result_uv); |
| 2904 | } |
| 2905 | RETURN; |
| 2906 | } |
| 2907 | |
| 2908 | /* String stuff. */ |
| 2909 | |
| 2910 | PP(pp_length) |
| 2911 | { |
| 2912 | dVAR; dSP; dTARGET; |
| 2913 | SV * const sv = TOPs; |
| 2914 | |
| 2915 | if (SvGAMAGIC(sv)) { |
| 2916 | /* For an overloaded or magic scalar, we can't know in advance if |
| 2917 | it's going to be UTF-8 or not. Also, we can't call sv_len_utf8 as |
| 2918 | it likes to cache the length. Maybe that should be a documented |
| 2919 | feature of it. |
| 2920 | */ |
| 2921 | STRLEN len; |
| 2922 | const char *const p |
| 2923 | = sv_2pv_flags(sv, &len, |
| 2924 | SV_UNDEF_RETURNS_NULL|SV_CONST_RETURN|SV_GMAGIC); |
| 2925 | |
| 2926 | if (!p) { |
| 2927 | if (!SvPADTMP(TARG)) { |
| 2928 | sv_setsv(TARG, &PL_sv_undef); |
| 2929 | SETTARG; |
| 2930 | } |
| 2931 | SETs(&PL_sv_undef); |
| 2932 | } |
| 2933 | else if (DO_UTF8(sv)) { |
| 2934 | SETi(utf8_length((U8*)p, (U8*)p + len)); |
| 2935 | } |
| 2936 | else |
| 2937 | SETi(len); |
| 2938 | } else if (SvOK(sv)) { |
| 2939 | /* Neither magic nor overloaded. */ |
| 2940 | if (DO_UTF8(sv)) |
| 2941 | SETi(sv_len_utf8(sv)); |
| 2942 | else |
| 2943 | SETi(sv_len(sv)); |
| 2944 | } else { |
| 2945 | if (!SvPADTMP(TARG)) { |
| 2946 | sv_setsv_nomg(TARG, &PL_sv_undef); |
| 2947 | SETTARG; |
| 2948 | } |
| 2949 | SETs(&PL_sv_undef); |
| 2950 | } |
| 2951 | RETURN; |
| 2952 | } |
| 2953 | |
| 2954 | /* Returns false if substring is completely outside original string. |
| 2955 | No length is indicated by len_iv = 0 and len_is_uv = 0. len_is_uv must |
| 2956 | always be true for an explicit 0. |
| 2957 | */ |
| 2958 | bool |
| 2959 | Perl_translate_substr_offsets(pTHX_ STRLEN curlen, IV pos1_iv, |
| 2960 | bool pos1_is_uv, IV len_iv, |
| 2961 | bool len_is_uv, STRLEN *posp, |
| 2962 | STRLEN *lenp) |
| 2963 | { |
| 2964 | IV pos2_iv; |
| 2965 | int pos2_is_uv; |
| 2966 | |
| 2967 | PERL_ARGS_ASSERT_TRANSLATE_SUBSTR_OFFSETS; |
| 2968 | |
| 2969 | if (!pos1_is_uv && pos1_iv < 0 && curlen) { |
| 2970 | pos1_is_uv = curlen-1 > ~(UV)pos1_iv; |
| 2971 | pos1_iv += curlen; |
| 2972 | } |
| 2973 | if ((pos1_is_uv || pos1_iv > 0) && (UV)pos1_iv > curlen) |
| 2974 | return FALSE; |
| 2975 | |
| 2976 | if (len_iv || len_is_uv) { |
| 2977 | if (!len_is_uv && len_iv < 0) { |
| 2978 | pos2_iv = curlen + len_iv; |
| 2979 | if (curlen) |
| 2980 | pos2_is_uv = curlen-1 > ~(UV)len_iv; |
| 2981 | else |
| 2982 | pos2_is_uv = 0; |
| 2983 | } else { /* len_iv >= 0 */ |
| 2984 | if (!pos1_is_uv && pos1_iv < 0) { |
| 2985 | pos2_iv = pos1_iv + len_iv; |
| 2986 | pos2_is_uv = (UV)len_iv > (UV)IV_MAX; |
| 2987 | } else { |
| 2988 | if ((UV)len_iv > curlen-(UV)pos1_iv) |
| 2989 | pos2_iv = curlen; |
| 2990 | else |
| 2991 | pos2_iv = pos1_iv+len_iv; |
| 2992 | pos2_is_uv = 1; |
| 2993 | } |
| 2994 | } |
| 2995 | } |
| 2996 | else { |
| 2997 | pos2_iv = curlen; |
| 2998 | pos2_is_uv = 1; |
| 2999 | } |
| 3000 | |
| 3001 | if (!pos2_is_uv && pos2_iv < 0) { |
| 3002 | if (!pos1_is_uv && pos1_iv < 0) |
| 3003 | return FALSE; |
| 3004 | pos2_iv = 0; |
| 3005 | } |
| 3006 | else if (!pos1_is_uv && pos1_iv < 0) |
| 3007 | pos1_iv = 0; |
| 3008 | |
| 3009 | if ((UV)pos2_iv < (UV)pos1_iv) |
| 3010 | pos2_iv = pos1_iv; |
| 3011 | if ((UV)pos2_iv > curlen) |
| 3012 | pos2_iv = curlen; |
| 3013 | |
| 3014 | /* pos1_iv and pos2_iv both in 0..curlen, so the cast is safe */ |
| 3015 | *posp = (STRLEN)( (UV)pos1_iv ); |
| 3016 | *lenp = (STRLEN)( (UV)pos2_iv - (UV)pos1_iv ); |
| 3017 | |
| 3018 | return TRUE; |
| 3019 | } |
| 3020 | |
| 3021 | PP(pp_substr) |
| 3022 | { |
| 3023 | dVAR; dSP; dTARGET; |
| 3024 | SV *sv; |
| 3025 | STRLEN curlen; |
| 3026 | STRLEN utf8_curlen; |
| 3027 | SV * pos_sv; |
| 3028 | IV pos1_iv; |
| 3029 | int pos1_is_uv; |
| 3030 | SV * len_sv; |
| 3031 | IV len_iv = 0; |
| 3032 | int len_is_uv = 0; |
| 3033 | I32 lvalue = PL_op->op_flags & OPf_MOD || LVRET; |
| 3034 | const bool rvalue = (GIMME_V != G_VOID); |
| 3035 | const char *tmps; |
| 3036 | SV *repl_sv = NULL; |
| 3037 | const char *repl = NULL; |
| 3038 | STRLEN repl_len; |
| 3039 | int num_args = PL_op->op_private & 7; |
| 3040 | bool repl_need_utf8_upgrade = FALSE; |
| 3041 | bool repl_is_utf8 = FALSE; |
| 3042 | |
| 3043 | if (num_args > 2) { |
| 3044 | if (num_args > 3) { |
| 3045 | if(!(repl_sv = POPs)) num_args--; |
| 3046 | } |
| 3047 | if ((len_sv = POPs)) { |
| 3048 | len_iv = SvIV(len_sv); |
| 3049 | len_is_uv = len_iv ? SvIOK_UV(len_sv) : 1; |
| 3050 | } |
| 3051 | else num_args--; |
| 3052 | } |
| 3053 | pos_sv = POPs; |
| 3054 | pos1_iv = SvIV(pos_sv); |
| 3055 | pos1_is_uv = SvIOK_UV(pos_sv); |
| 3056 | sv = POPs; |
| 3057 | if (PL_op->op_private & OPpSUBSTR_REPL_FIRST) { |
| 3058 | assert(!repl_sv); |
| 3059 | repl_sv = POPs; |
| 3060 | } |
| 3061 | PUTBACK; |
| 3062 | if (repl_sv) { |
| 3063 | repl = SvPV_const(repl_sv, repl_len); |
| 3064 | repl_is_utf8 = DO_UTF8(repl_sv) && repl_len; |
| 3065 | if (repl_is_utf8) { |
| 3066 | if (!DO_UTF8(sv)) |
| 3067 | sv_utf8_upgrade(sv); |
| 3068 | } |
| 3069 | else if (DO_UTF8(sv)) |
| 3070 | repl_need_utf8_upgrade = TRUE; |
| 3071 | } |
| 3072 | else if (lvalue) { |
| 3073 | SV * ret; |
| 3074 | ret = sv_2mortal(newSV_type(SVt_PVLV)); /* Not TARG RT#67838 */ |
| 3075 | sv_magic(ret, NULL, PERL_MAGIC_substr, NULL, 0); |
| 3076 | LvTYPE(ret) = 'x'; |
| 3077 | LvTARG(ret) = SvREFCNT_inc_simple(sv); |
| 3078 | LvTARGOFF(ret) = |
| 3079 | pos1_is_uv || pos1_iv >= 0 |
| 3080 | ? (STRLEN)(UV)pos1_iv |
| 3081 | : (LvFLAGS(ret) |= 1, (STRLEN)(UV)-pos1_iv); |
| 3082 | LvTARGLEN(ret) = |
| 3083 | len_is_uv || len_iv > 0 |
| 3084 | ? (STRLEN)(UV)len_iv |
| 3085 | : (LvFLAGS(ret) |= 2, (STRLEN)(UV)-len_iv); |
| 3086 | |
| 3087 | SPAGAIN; |
| 3088 | PUSHs(ret); /* avoid SvSETMAGIC here */ |
| 3089 | RETURN; |
| 3090 | } |
| 3091 | tmps = SvPV_const(sv, curlen); |
| 3092 | if (DO_UTF8(sv)) { |
| 3093 | utf8_curlen = sv_len_utf8(sv); |
| 3094 | if (utf8_curlen == curlen) |
| 3095 | utf8_curlen = 0; |
| 3096 | else |
| 3097 | curlen = utf8_curlen; |
| 3098 | } |
| 3099 | else |
| 3100 | utf8_curlen = 0; |
| 3101 | |
| 3102 | { |
| 3103 | STRLEN pos, len, byte_len, byte_pos; |
| 3104 | |
| 3105 | if (!translate_substr_offsets( |
| 3106 | curlen, pos1_iv, pos1_is_uv, len_iv, len_is_uv, &pos, &len |
| 3107 | )) goto bound_fail; |
| 3108 | |
| 3109 | byte_len = len; |
| 3110 | byte_pos = utf8_curlen |
| 3111 | ? sv_pos_u2b_flags(sv, pos, &byte_len, SV_CONST_RETURN) : pos; |
| 3112 | |
| 3113 | tmps += byte_pos; |
| 3114 | |
| 3115 | if (rvalue) { |
| 3116 | SvTAINTED_off(TARG); /* decontaminate */ |
| 3117 | SvUTF8_off(TARG); /* decontaminate */ |
| 3118 | sv_setpvn(TARG, tmps, byte_len); |
| 3119 | #ifdef USE_LOCALE_COLLATE |
| 3120 | sv_unmagic(TARG, PERL_MAGIC_collxfrm); |
| 3121 | #endif |
| 3122 | if (utf8_curlen) |
| 3123 | SvUTF8_on(TARG); |
| 3124 | } |
| 3125 | |
| 3126 | if (repl) { |
| 3127 | SV* repl_sv_copy = NULL; |
| 3128 | |
| 3129 | if (repl_need_utf8_upgrade) { |
| 3130 | repl_sv_copy = newSVsv(repl_sv); |
| 3131 | sv_utf8_upgrade(repl_sv_copy); |
| 3132 | repl = SvPV_const(repl_sv_copy, repl_len); |
| 3133 | repl_is_utf8 = DO_UTF8(repl_sv_copy) && repl_len; |
| 3134 | } |
| 3135 | if (SvROK(sv)) |
| 3136 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), |
| 3137 | "Attempt to use reference as lvalue in substr" |
| 3138 | ); |
| 3139 | if (!SvOK(sv)) |
| 3140 | sv_setpvs(sv, ""); |
| 3141 | sv_insert_flags(sv, byte_pos, byte_len, repl, repl_len, 0); |
| 3142 | if (repl_is_utf8) |
| 3143 | SvUTF8_on(sv); |
| 3144 | SvREFCNT_dec(repl_sv_copy); |
| 3145 | } |
| 3146 | } |
| 3147 | SPAGAIN; |
| 3148 | if (rvalue) { |
| 3149 | SvSETMAGIC(TARG); |
| 3150 | PUSHs(TARG); |
| 3151 | } |
| 3152 | RETURN; |
| 3153 | |
| 3154 | bound_fail: |
| 3155 | if (repl) |
| 3156 | Perl_croak(aTHX_ "substr outside of string"); |
| 3157 | Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string"); |
| 3158 | RETPUSHUNDEF; |
| 3159 | } |
| 3160 | |
| 3161 | PP(pp_vec) |
| 3162 | { |
| 3163 | dVAR; dSP; |
| 3164 | register const IV size = POPi; |
| 3165 | register const IV offset = POPi; |
| 3166 | register SV * const src = POPs; |
| 3167 | const I32 lvalue = PL_op->op_flags & OPf_MOD || LVRET; |
| 3168 | SV * ret; |
| 3169 | |
| 3170 | if (lvalue) { /* it's an lvalue! */ |
| 3171 | ret = sv_2mortal(newSV_type(SVt_PVLV)); /* Not TARG RT#67838 */ |
| 3172 | sv_magic(ret, NULL, PERL_MAGIC_vec, NULL, 0); |
| 3173 | LvTYPE(ret) = 'v'; |
| 3174 | LvTARG(ret) = SvREFCNT_inc_simple(src); |
| 3175 | LvTARGOFF(ret) = offset; |
| 3176 | LvTARGLEN(ret) = size; |
| 3177 | } |
| 3178 | else { |
| 3179 | dTARGET; |
| 3180 | SvTAINTED_off(TARG); /* decontaminate */ |
| 3181 | ret = TARG; |
| 3182 | } |
| 3183 | |
| 3184 | sv_setuv(ret, do_vecget(src, offset, size)); |
| 3185 | PUSHs(ret); |
| 3186 | RETURN; |
| 3187 | } |
| 3188 | |
| 3189 | PP(pp_index) |
| 3190 | { |
| 3191 | dVAR; dSP; dTARGET; |
| 3192 | SV *big; |
| 3193 | SV *little; |
| 3194 | SV *temp = NULL; |
| 3195 | STRLEN biglen; |
| 3196 | STRLEN llen = 0; |
| 3197 | I32 offset; |
| 3198 | I32 retval; |
| 3199 | const char *big_p; |
| 3200 | const char *little_p; |
| 3201 | bool big_utf8; |
| 3202 | bool little_utf8; |
| 3203 | const bool is_index = PL_op->op_type == OP_INDEX; |
| 3204 | const bool threeargs = MAXARG >= 3 && (TOPs || ((void)POPs,0)); |
| 3205 | |
| 3206 | if (threeargs) |
| 3207 | offset = POPi; |
| 3208 | little = POPs; |
| 3209 | big = POPs; |
| 3210 | big_p = SvPV_const(big, biglen); |
| 3211 | little_p = SvPV_const(little, llen); |
| 3212 | |
| 3213 | big_utf8 = DO_UTF8(big); |
| 3214 | little_utf8 = DO_UTF8(little); |
| 3215 | if (big_utf8 ^ little_utf8) { |
| 3216 | /* One needs to be upgraded. */ |
| 3217 | if (little_utf8 && !PL_encoding) { |
| 3218 | /* Well, maybe instead we might be able to downgrade the small |
| 3219 | string? */ |
| 3220 | char * const pv = (char*)bytes_from_utf8((U8 *)little_p, &llen, |
| 3221 | &little_utf8); |
| 3222 | if (little_utf8) { |
| 3223 | /* If the large string is ISO-8859-1, and it's not possible to |
| 3224 | convert the small string to ISO-8859-1, then there is no |
| 3225 | way that it could be found anywhere by index. */ |
| 3226 | retval = -1; |
| 3227 | goto fail; |
| 3228 | } |
| 3229 | |
| 3230 | /* At this point, pv is a malloc()ed string. So donate it to temp |
| 3231 | to ensure it will get free()d */ |
| 3232 | little = temp = newSV(0); |
| 3233 | sv_usepvn(temp, pv, llen); |
| 3234 | little_p = SvPVX(little); |
| 3235 | } else { |
| 3236 | temp = little_utf8 |
| 3237 | ? newSVpvn(big_p, biglen) : newSVpvn(little_p, llen); |
| 3238 | |
| 3239 | if (PL_encoding) { |
| 3240 | sv_recode_to_utf8(temp, PL_encoding); |
| 3241 | } else { |
| 3242 | sv_utf8_upgrade(temp); |
| 3243 | } |
| 3244 | if (little_utf8) { |
| 3245 | big = temp; |
| 3246 | big_utf8 = TRUE; |
| 3247 | big_p = SvPV_const(big, biglen); |
| 3248 | } else { |
| 3249 | little = temp; |
| 3250 | little_p = SvPV_const(little, llen); |
| 3251 | } |
| 3252 | } |
| 3253 | } |
| 3254 | if (SvGAMAGIC(big)) { |
| 3255 | /* Life just becomes a lot easier if I use a temporary here. |
| 3256 | Otherwise I need to avoid calls to sv_pos_u2b(), which (dangerously) |
| 3257 | will trigger magic and overloading again, as will fbm_instr() |
| 3258 | */ |
| 3259 | big = newSVpvn_flags(big_p, biglen, |
| 3260 | SVs_TEMP | (big_utf8 ? SVf_UTF8 : 0)); |
| 3261 | big_p = SvPVX(big); |
| 3262 | } |
| 3263 | if (SvGAMAGIC(little) || (is_index && !SvOK(little))) { |
| 3264 | /* index && SvOK() is a hack. fbm_instr() calls SvPV_const, which will |
| 3265 | warn on undef, and we've already triggered a warning with the |
| 3266 | SvPV_const some lines above. We can't remove that, as we need to |
| 3267 | call some SvPV to trigger overloading early and find out if the |
| 3268 | string is UTF-8. |
| 3269 | This is all getting to messy. The API isn't quite clean enough, |
| 3270 | because data access has side effects. |
| 3271 | */ |
| 3272 | little = newSVpvn_flags(little_p, llen, |
| 3273 | SVs_TEMP | (little_utf8 ? SVf_UTF8 : 0)); |
| 3274 | little_p = SvPVX(little); |
| 3275 | } |
| 3276 | |
| 3277 | if (!threeargs) |
| 3278 | offset = is_index ? 0 : biglen; |
| 3279 | else { |
| 3280 | if (big_utf8 && offset > 0) |
| 3281 | sv_pos_u2b(big, &offset, 0); |
| 3282 | if (!is_index) |
| 3283 | offset += llen; |
| 3284 | } |
| 3285 | if (offset < 0) |
| 3286 | offset = 0; |
| 3287 | else if (offset > (I32)biglen) |
| 3288 | offset = biglen; |
| 3289 | if (!(little_p = is_index |
| 3290 | ? fbm_instr((unsigned char*)big_p + offset, |
| 3291 | (unsigned char*)big_p + biglen, little, 0) |
| 3292 | : rninstr(big_p, big_p + offset, |
| 3293 | little_p, little_p + llen))) |
| 3294 | retval = -1; |
| 3295 | else { |
| 3296 | retval = little_p - big_p; |
| 3297 | if (retval > 0 && big_utf8) |
| 3298 | sv_pos_b2u(big, &retval); |
| 3299 | } |
| 3300 | SvREFCNT_dec(temp); |
| 3301 | fail: |
| 3302 | PUSHi(retval); |
| 3303 | RETURN; |
| 3304 | } |
| 3305 | |
| 3306 | PP(pp_sprintf) |
| 3307 | { |
| 3308 | dVAR; dSP; dMARK; dORIGMARK; dTARGET; |
| 3309 | SvTAINTED_off(TARG); |
| 3310 | do_sprintf(TARG, SP-MARK, MARK+1); |
| 3311 | TAINT_IF(SvTAINTED(TARG)); |
| 3312 | SP = ORIGMARK; |
| 3313 | PUSHTARG; |
| 3314 | RETURN; |
| 3315 | } |
| 3316 | |
| 3317 | PP(pp_ord) |
| 3318 | { |
| 3319 | dVAR; dSP; dTARGET; |
| 3320 | |
| 3321 | SV *argsv = POPs; |
| 3322 | STRLEN len; |
| 3323 | const U8 *s = (U8*)SvPV_const(argsv, len); |
| 3324 | |
| 3325 | if (PL_encoding && SvPOK(argsv) && !DO_UTF8(argsv)) { |
| 3326 | SV * const tmpsv = sv_2mortal(newSVsv(argsv)); |
| 3327 | s = (U8*)sv_recode_to_utf8(tmpsv, PL_encoding); |
| 3328 | argsv = tmpsv; |
| 3329 | } |
| 3330 | |
| 3331 | XPUSHu(DO_UTF8(argsv) ? |
| 3332 | utf8n_to_uvchr(s, UTF8_MAXBYTES, 0, UTF8_ALLOW_ANYUV) : |
| 3333 | (UV)(*s & 0xff)); |
| 3334 | |
| 3335 | RETURN; |
| 3336 | } |
| 3337 | |
| 3338 | PP(pp_chr) |
| 3339 | { |
| 3340 | dVAR; dSP; dTARGET; |
| 3341 | char *tmps; |
| 3342 | UV value; |
| 3343 | |
| 3344 | if (((SvIOK_notUV(TOPs) && SvIV(TOPs) < 0) |
| 3345 | || |
| 3346 | (SvNOK(TOPs) && SvNV(TOPs) < 0.0))) { |
| 3347 | if (IN_BYTES) { |
| 3348 | value = POPu; /* chr(-1) eq chr(0xff), etc. */ |
| 3349 | } else { |
| 3350 | (void) POPs; /* Ignore the argument value. */ |
| 3351 | value = UNICODE_REPLACEMENT; |
| 3352 | } |
| 3353 | } else { |
| 3354 | value = POPu; |
| 3355 | } |
| 3356 | |
| 3357 | SvUPGRADE(TARG,SVt_PV); |
| 3358 | |
| 3359 | if (value > 255 && !IN_BYTES) { |
| 3360 | SvGROW(TARG, (STRLEN)UNISKIP(value)+1); |
| 3361 | tmps = (char*)uvchr_to_utf8_flags((U8*)SvPVX(TARG), value, 0); |
| 3362 | SvCUR_set(TARG, tmps - SvPVX_const(TARG)); |
| 3363 | *tmps = '\0'; |
| 3364 | (void)SvPOK_only(TARG); |
| 3365 | SvUTF8_on(TARG); |
| 3366 | XPUSHs(TARG); |
| 3367 | RETURN; |
| 3368 | } |
| 3369 | |
| 3370 | SvGROW(TARG,2); |
| 3371 | SvCUR_set(TARG, 1); |
| 3372 | tmps = SvPVX(TARG); |
| 3373 | *tmps++ = (char)value; |
| 3374 | *tmps = '\0'; |
| 3375 | (void)SvPOK_only(TARG); |
| 3376 | |
| 3377 | if (PL_encoding && !IN_BYTES) { |
| 3378 | sv_recode_to_utf8(TARG, PL_encoding); |
| 3379 | tmps = SvPVX(TARG); |
| 3380 | if (SvCUR(TARG) == 0 || !is_utf8_string((U8*)tmps, SvCUR(TARG)) || |
| 3381 | UNICODE_IS_REPLACEMENT(utf8_to_uvchr((U8*)tmps, NULL))) { |
| 3382 | SvGROW(TARG, 2); |
| 3383 | tmps = SvPVX(TARG); |
| 3384 | SvCUR_set(TARG, 1); |
| 3385 | *tmps++ = (char)value; |
| 3386 | *tmps = '\0'; |
| 3387 | SvUTF8_off(TARG); |
| 3388 | } |
| 3389 | } |
| 3390 | |
| 3391 | XPUSHs(TARG); |
| 3392 | RETURN; |
| 3393 | } |
| 3394 | |
| 3395 | PP(pp_crypt) |
| 3396 | { |
| 3397 | #ifdef HAS_CRYPT |
| 3398 | dVAR; dSP; dTARGET; |
| 3399 | dPOPTOPssrl; |
| 3400 | STRLEN len; |
| 3401 | const char *tmps = SvPV_const(left, len); |
| 3402 | |
| 3403 | if (DO_UTF8(left)) { |
| 3404 | /* If Unicode, try to downgrade. |
| 3405 | * If not possible, croak. |
| 3406 | * Yes, we made this up. */ |
| 3407 | SV* const tsv = sv_2mortal(newSVsv(left)); |
| 3408 | |
| 3409 | SvUTF8_on(tsv); |
| 3410 | sv_utf8_downgrade(tsv, FALSE); |
| 3411 | tmps = SvPV_const(tsv, len); |
| 3412 | } |
| 3413 | # ifdef USE_ITHREADS |
| 3414 | # ifdef HAS_CRYPT_R |
| 3415 | if (!PL_reentrant_buffer->_crypt_struct_buffer) { |
| 3416 | /* This should be threadsafe because in ithreads there is only |
| 3417 | * one thread per interpreter. If this would not be true, |
| 3418 | * we would need a mutex to protect this malloc. */ |
| 3419 | PL_reentrant_buffer->_crypt_struct_buffer = |
| 3420 | (struct crypt_data *)safemalloc(sizeof(struct crypt_data)); |
| 3421 | #if defined(__GLIBC__) || defined(__EMX__) |
| 3422 | if (PL_reentrant_buffer->_crypt_struct_buffer) { |
| 3423 | PL_reentrant_buffer->_crypt_struct_buffer->initialized = 0; |
| 3424 | /* work around glibc-2.2.5 bug */ |
| 3425 | PL_reentrant_buffer->_crypt_struct_buffer->current_saltbits = 0; |
| 3426 | } |
| 3427 | #endif |
| 3428 | } |
| 3429 | # endif /* HAS_CRYPT_R */ |
| 3430 | # endif /* USE_ITHREADS */ |
| 3431 | # ifdef FCRYPT |
| 3432 | sv_setpv(TARG, fcrypt(tmps, SvPV_nolen_const(right))); |
| 3433 | # else |
| 3434 | sv_setpv(TARG, PerlProc_crypt(tmps, SvPV_nolen_const(right))); |
| 3435 | # endif |
| 3436 | SETTARG; |
| 3437 | RETURN; |
| 3438 | #else |
| 3439 | DIE(aTHX_ |
| 3440 | "The crypt() function is unimplemented due to excessive paranoia."); |
| 3441 | #endif |
| 3442 | } |
| 3443 | |
| 3444 | /* Generally UTF-8 and UTF-EBCDIC are indistinguishable at this level. So |
| 3445 | * most comments below say UTF-8, when in fact they mean UTF-EBCDIC as well */ |
| 3446 | |
| 3447 | /* Generates code to store a unicode codepoint c that is known to occupy |
| 3448 | * exactly two UTF-8 and UTF-EBCDIC bytes; it is stored into p and p+1, |
| 3449 | * and p is advanced to point to the next available byte after the two bytes */ |
| 3450 | #define CAT_UNI_TO_UTF8_TWO_BYTE(p, c) \ |
| 3451 | STMT_START { \ |
| 3452 | *(p)++ = UTF8_TWO_BYTE_HI(c); \ |
| 3453 | *((p)++) = UTF8_TWO_BYTE_LO(c); \ |
| 3454 | } STMT_END |
| 3455 | |
| 3456 | PP(pp_ucfirst) |
| 3457 | { |
| 3458 | /* Actually is both lcfirst() and ucfirst(). Only the first character |
| 3459 | * changes. This means that possibly we can change in-place, ie., just |
| 3460 | * take the source and change that one character and store it back, but not |
| 3461 | * if read-only etc, or if the length changes */ |
| 3462 | |
| 3463 | dVAR; |
| 3464 | dSP; |
| 3465 | SV *source = TOPs; |
| 3466 | STRLEN slen; /* slen is the byte length of the whole SV. */ |
| 3467 | STRLEN need; |
| 3468 | SV *dest; |
| 3469 | bool inplace; /* ? Convert first char only, in-place */ |
| 3470 | bool doing_utf8 = FALSE; /* ? using utf8 */ |
| 3471 | bool convert_source_to_utf8 = FALSE; /* ? need to convert */ |
| 3472 | const int op_type = PL_op->op_type; |
| 3473 | const U8 *s; |
| 3474 | U8 *d; |
| 3475 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1]; |
| 3476 | STRLEN ulen; /* ulen is the byte length of the original Unicode character |
| 3477 | * stored as UTF-8 at s. */ |
| 3478 | STRLEN tculen; /* tculen is the byte length of the freshly titlecased (or |
| 3479 | * lowercased) character stored in tmpbuf. May be either |
| 3480 | * UTF-8 or not, but in either case is the number of bytes */ |
| 3481 | bool tainted = FALSE; |
| 3482 | |
| 3483 | SvGETMAGIC(source); |
| 3484 | if (SvOK(source)) { |
| 3485 | s = (const U8*)SvPV_nomg_const(source, slen); |
| 3486 | } else { |
| 3487 | if (ckWARN(WARN_UNINITIALIZED)) |
| 3488 | report_uninit(source); |
| 3489 | s = (const U8*)""; |
| 3490 | slen = 0; |
| 3491 | } |
| 3492 | |
| 3493 | /* We may be able to get away with changing only the first character, in |
| 3494 | * place, but not if read-only, etc. Later we may discover more reasons to |
| 3495 | * not convert in-place. */ |
| 3496 | inplace = SvPADTMP(source) && !SvREADONLY(source) && SvTEMP(source); |
| 3497 | |
| 3498 | /* First calculate what the changed first character should be. This affects |
| 3499 | * whether we can just swap it out, leaving the rest of the string unchanged, |
| 3500 | * or even if have to convert the dest to UTF-8 when the source isn't */ |
| 3501 | |
| 3502 | if (! slen) { /* If empty */ |
| 3503 | need = 1; /* still need a trailing NUL */ |
| 3504 | ulen = 0; |
| 3505 | } |
| 3506 | else if (DO_UTF8(source)) { /* Is the source utf8? */ |
| 3507 | doing_utf8 = TRUE; |
| 3508 | ulen = UTF8SKIP(s); |
| 3509 | if (op_type == OP_UCFIRST) { |
| 3510 | _to_utf8_title_flags(s, tmpbuf, &tculen, |
| 3511 | cBOOL(IN_LOCALE_RUNTIME), &tainted); |
| 3512 | } |
| 3513 | else { |
| 3514 | _to_utf8_lower_flags(s, tmpbuf, &tculen, |
| 3515 | cBOOL(IN_LOCALE_RUNTIME), &tainted); |
| 3516 | } |
| 3517 | |
| 3518 | /* we can't do in-place if the length changes. */ |
| 3519 | if (ulen != tculen) inplace = FALSE; |
| 3520 | need = slen + 1 - ulen + tculen; |
| 3521 | } |
| 3522 | else { /* Non-zero length, non-UTF-8, Need to consider locale and if |
| 3523 | * latin1 is treated as caseless. Note that a locale takes |
| 3524 | * precedence */ |
| 3525 | ulen = 1; /* Original character is 1 byte */ |
| 3526 | tculen = 1; /* Most characters will require one byte, but this will |
| 3527 | * need to be overridden for the tricky ones */ |
| 3528 | need = slen + 1; |
| 3529 | |
| 3530 | if (op_type == OP_LCFIRST) { |
| 3531 | |
| 3532 | /* lower case the first letter: no trickiness for any character */ |
| 3533 | *tmpbuf = (IN_LOCALE_RUNTIME) ? toLOWER_LC(*s) : |
| 3534 | ((IN_UNI_8_BIT) ? toLOWER_LATIN1(*s) : toLOWER(*s)); |
| 3535 | } |
| 3536 | /* is ucfirst() */ |
| 3537 | else if (IN_LOCALE_RUNTIME) { |
| 3538 | *tmpbuf = toUPPER_LC(*s); /* This would be a bug if any locales |
| 3539 | * have upper and title case different |
| 3540 | */ |
| 3541 | } |
| 3542 | else if (! IN_UNI_8_BIT) { |
| 3543 | *tmpbuf = toUPPER(*s); /* Returns caseless for non-ascii, or |
| 3544 | * on EBCDIC machines whatever the |
| 3545 | * native function does */ |
| 3546 | } |
| 3547 | else { /* is ucfirst non-UTF-8, not in locale, and cased latin1 */ |
| 3548 | UV title_ord = _to_upper_title_latin1(*s, tmpbuf, &tculen, 's'); |
| 3549 | if (tculen > 1) { |
| 3550 | assert(tculen == 2); |
| 3551 | |
| 3552 | /* If the result is an upper Latin1-range character, it can |
| 3553 | * still be represented in one byte, which is its ordinal */ |
| 3554 | if (UTF8_IS_DOWNGRADEABLE_START(*tmpbuf)) { |
| 3555 | *tmpbuf = (U8) title_ord; |
| 3556 | tculen = 1; |
| 3557 | } |
| 3558 | else { |
| 3559 | /* Otherwise it became more than one ASCII character (in |
| 3560 | * the case of LATIN_SMALL_LETTER_SHARP_S) or changed to |
| 3561 | * beyond Latin1, so the number of bytes changed, so can't |
| 3562 | * replace just the first character in place. */ |
| 3563 | inplace = FALSE; |
| 3564 | |
| 3565 | /* If the result won't fit in a byte, the entire result will |
| 3566 | * have to be in UTF-8. Assume worst case sizing in |
| 3567 | * conversion. (all latin1 characters occupy at most two bytes |
| 3568 | * in utf8) */ |
| 3569 | if (title_ord > 255) { |
| 3570 | doing_utf8 = TRUE; |
| 3571 | convert_source_to_utf8 = TRUE; |
| 3572 | need = slen * 2 + 1; |
| 3573 | |
| 3574 | /* The (converted) UTF-8 and UTF-EBCDIC lengths of all |
| 3575 | * (both) characters whose title case is above 255 is |
| 3576 | * 2. */ |
| 3577 | ulen = 2; |
| 3578 | } |
| 3579 | else { /* LATIN_SMALL_LETTER_SHARP_S expands by 1 byte */ |
| 3580 | need = slen + 1 + 1; |
| 3581 | } |
| 3582 | } |
| 3583 | } |
| 3584 | } /* End of use Unicode (Latin1) semantics */ |
| 3585 | } /* End of changing the case of the first character */ |
| 3586 | |
| 3587 | /* Here, have the first character's changed case stored in tmpbuf. Ready to |
| 3588 | * generate the result */ |
| 3589 | if (inplace) { |
| 3590 | |
| 3591 | /* We can convert in place. This means we change just the first |
| 3592 | * character without disturbing the rest; no need to grow */ |
| 3593 | dest = source; |
| 3594 | s = d = (U8*)SvPV_force_nomg(source, slen); |
| 3595 | } else { |
| 3596 | dTARGET; |
| 3597 | |
| 3598 | dest = TARG; |
| 3599 | |
| 3600 | /* Here, we can't convert in place; we earlier calculated how much |
| 3601 | * space we will need, so grow to accommodate that */ |
| 3602 | SvUPGRADE(dest, SVt_PV); |
| 3603 | d = (U8*)SvGROW(dest, need); |
| 3604 | (void)SvPOK_only(dest); |
| 3605 | |
| 3606 | SETs(dest); |
| 3607 | } |
| 3608 | |
| 3609 | if (doing_utf8) { |
| 3610 | if (! inplace) { |
| 3611 | if (! convert_source_to_utf8) { |
| 3612 | |
| 3613 | /* Here both source and dest are in UTF-8, but have to create |
| 3614 | * the entire output. We initialize the result to be the |
| 3615 | * title/lower cased first character, and then append the rest |
| 3616 | * of the string. */ |
| 3617 | sv_setpvn(dest, (char*)tmpbuf, tculen); |
| 3618 | if (slen > ulen) { |
| 3619 | sv_catpvn(dest, (char*)(s + ulen), slen - ulen); |
| 3620 | } |
| 3621 | } |
| 3622 | else { |
| 3623 | const U8 *const send = s + slen; |
| 3624 | |
| 3625 | /* Here the dest needs to be in UTF-8, but the source isn't, |
| 3626 | * except we earlier UTF-8'd the first character of the source |
| 3627 | * into tmpbuf. First put that into dest, and then append the |
| 3628 | * rest of the source, converting it to UTF-8 as we go. */ |
| 3629 | |
| 3630 | /* Assert tculen is 2 here because the only two characters that |
| 3631 | * get to this part of the code have 2-byte UTF-8 equivalents */ |
| 3632 | *d++ = *tmpbuf; |
| 3633 | *d++ = *(tmpbuf + 1); |
| 3634 | s++; /* We have just processed the 1st char */ |
| 3635 | |
| 3636 | for (; s < send; s++) { |
| 3637 | d = uvchr_to_utf8(d, *s); |
| 3638 | } |
| 3639 | *d = '\0'; |
| 3640 | SvCUR_set(dest, d - (U8*)SvPVX_const(dest)); |
| 3641 | } |
| 3642 | SvUTF8_on(dest); |
| 3643 | } |
| 3644 | else { /* in-place UTF-8. Just overwrite the first character */ |
| 3645 | Copy(tmpbuf, d, tculen, U8); |
| 3646 | SvCUR_set(dest, need - 1); |
| 3647 | } |
| 3648 | |
| 3649 | if (tainted) { |
| 3650 | TAINT; |
| 3651 | SvTAINTED_on(dest); |
| 3652 | } |
| 3653 | } |
| 3654 | else { /* Neither source nor dest are in or need to be UTF-8 */ |
| 3655 | if (slen) { |
| 3656 | if (IN_LOCALE_RUNTIME) { |
| 3657 | TAINT; |
| 3658 | SvTAINTED_on(dest); |
| 3659 | } |
| 3660 | if (inplace) { /* in-place, only need to change the 1st char */ |
| 3661 | *d = *tmpbuf; |
| 3662 | } |
| 3663 | else { /* Not in-place */ |
| 3664 | |
| 3665 | /* Copy the case-changed character(s) from tmpbuf */ |
| 3666 | Copy(tmpbuf, d, tculen, U8); |
| 3667 | d += tculen - 1; /* Code below expects d to point to final |
| 3668 | * character stored */ |
| 3669 | } |
| 3670 | } |
| 3671 | else { /* empty source */ |
| 3672 | /* See bug #39028: Don't taint if empty */ |
| 3673 | *d = *s; |
| 3674 | } |
| 3675 | |
| 3676 | /* In a "use bytes" we don't treat the source as UTF-8, but, still want |
| 3677 | * the destination to retain that flag */ |
| 3678 | if (SvUTF8(source)) |
| 3679 | SvUTF8_on(dest); |
| 3680 | |
| 3681 | if (!inplace) { /* Finish the rest of the string, unchanged */ |
| 3682 | /* This will copy the trailing NUL */ |
| 3683 | Copy(s + 1, d + 1, slen, U8); |
| 3684 | SvCUR_set(dest, need - 1); |
| 3685 | } |
| 3686 | } |
| 3687 | if (dest != source && SvTAINTED(source)) |
| 3688 | SvTAINT(dest); |
| 3689 | SvSETMAGIC(dest); |
| 3690 | RETURN; |
| 3691 | } |
| 3692 | |
| 3693 | /* There's so much setup/teardown code common between uc and lc, I wonder if |
| 3694 | it would be worth merging the two, and just having a switch outside each |
| 3695 | of the three tight loops. There is less and less commonality though */ |
| 3696 | PP(pp_uc) |
| 3697 | { |
| 3698 | dVAR; |
| 3699 | dSP; |
| 3700 | SV *source = TOPs; |
| 3701 | STRLEN len; |
| 3702 | STRLEN min; |
| 3703 | SV *dest; |
| 3704 | const U8 *s; |
| 3705 | U8 *d; |
| 3706 | |
| 3707 | SvGETMAGIC(source); |
| 3708 | |
| 3709 | if (SvPADTMP(source) && !SvREADONLY(source) && !SvAMAGIC(source) |
| 3710 | && SvTEMP(source) && !DO_UTF8(source) |
| 3711 | && (IN_LOCALE_RUNTIME || ! IN_UNI_8_BIT)) { |
| 3712 | |
| 3713 | /* We can convert in place. The reason we can't if in UNI_8_BIT is to |
| 3714 | * make the loop tight, so we overwrite the source with the dest before |
| 3715 | * looking at it, and we need to look at the original source |
| 3716 | * afterwards. There would also need to be code added to handle |
| 3717 | * switching to not in-place in midstream if we run into characters |
| 3718 | * that change the length. |
| 3719 | */ |
| 3720 | dest = source; |
| 3721 | s = d = (U8*)SvPV_force_nomg(source, len); |
| 3722 | min = len + 1; |
| 3723 | } else { |
| 3724 | dTARGET; |
| 3725 | |
| 3726 | dest = TARG; |
| 3727 | |
| 3728 | /* The old implementation would copy source into TARG at this point. |
| 3729 | This had the side effect that if source was undef, TARG was now |
| 3730 | an undefined SV with PADTMP set, and they don't warn inside |
| 3731 | sv_2pv_flags(). However, we're now getting the PV direct from |
| 3732 | source, which doesn't have PADTMP set, so it would warn. Hence the |
| 3733 | little games. */ |
| 3734 | |
| 3735 | if (SvOK(source)) { |
| 3736 | s = (const U8*)SvPV_nomg_const(source, len); |
| 3737 | } else { |
| 3738 | if (ckWARN(WARN_UNINITIALIZED)) |
| 3739 | report_uninit(source); |
| 3740 | s = (const U8*)""; |
| 3741 | len = 0; |
| 3742 | } |
| 3743 | min = len + 1; |
| 3744 | |
| 3745 | SvUPGRADE(dest, SVt_PV); |
| 3746 | d = (U8*)SvGROW(dest, min); |
| 3747 | (void)SvPOK_only(dest); |
| 3748 | |
| 3749 | SETs(dest); |
| 3750 | } |
| 3751 | |
| 3752 | /* Overloaded values may have toggled the UTF-8 flag on source, so we need |
| 3753 | to check DO_UTF8 again here. */ |
| 3754 | |
| 3755 | if (DO_UTF8(source)) { |
| 3756 | const U8 *const send = s + len; |
| 3757 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
| 3758 | bool tainted = FALSE; |
| 3759 | |
| 3760 | /* All occurrences of these are to be moved to follow any other marks. |
| 3761 | * This is context-dependent. We may not be passed enough context to |
| 3762 | * move the iota subscript beyond all of them, but we do the best we can |
| 3763 | * with what we're given. The result is always better than if we |
| 3764 | * hadn't done this. And, the problem would only arise if we are |
| 3765 | * passed a character without all its combining marks, which would be |
| 3766 | * the caller's mistake. The information this is based on comes from a |
| 3767 | * comment in Unicode SpecialCasing.txt, (and the Standard's text |
| 3768 | * itself) and so can't be checked properly to see if it ever gets |
| 3769 | * revised. But the likelihood of it changing is remote */ |
| 3770 | bool in_iota_subscript = FALSE; |
| 3771 | |
| 3772 | while (s < send) { |
| 3773 | STRLEN u; |
| 3774 | STRLEN ulen; |
| 3775 | UV uv; |
| 3776 | if (in_iota_subscript && ! is_utf8_mark(s)) { |
| 3777 | |
| 3778 | /* A non-mark. Time to output the iota subscript */ |
| 3779 | #define GREEK_CAPITAL_LETTER_IOTA 0x0399 |
| 3780 | #define COMBINING_GREEK_YPOGEGRAMMENI 0x0345 |
| 3781 | |
| 3782 | CAT_UNI_TO_UTF8_TWO_BYTE(d, GREEK_CAPITAL_LETTER_IOTA); |
| 3783 | in_iota_subscript = FALSE; |
| 3784 | } |
| 3785 | |
| 3786 | /* Then handle the current character. Get the changed case value |
| 3787 | * and copy it to the output buffer */ |
| 3788 | |
| 3789 | u = UTF8SKIP(s); |
| 3790 | uv = _to_utf8_upper_flags(s, tmpbuf, &ulen, |
| 3791 | cBOOL(IN_LOCALE_RUNTIME), &tainted); |
| 3792 | if (uv == GREEK_CAPITAL_LETTER_IOTA |
| 3793 | && utf8_to_uvchr(s, 0) == COMBINING_GREEK_YPOGEGRAMMENI) |
| 3794 | { |
| 3795 | in_iota_subscript = TRUE; |
| 3796 | } |
| 3797 | else { |
| 3798 | if (ulen > u && (SvLEN(dest) < (min += ulen - u))) { |
| 3799 | /* If the eventually required minimum size outgrows the |
| 3800 | * available space, we need to grow. */ |
| 3801 | const UV o = d - (U8*)SvPVX_const(dest); |
| 3802 | |
| 3803 | /* If someone uppercases one million U+03B0s we SvGROW() |
| 3804 | * one million times. Or we could try guessing how much to |
| 3805 | * allocate without allocating too much. Such is life. |
| 3806 | * See corresponding comment in lc code for another option |
| 3807 | * */ |
| 3808 | SvGROW(dest, min); |
| 3809 | d = (U8*)SvPVX(dest) + o; |
| 3810 | } |
| 3811 | Copy(tmpbuf, d, ulen, U8); |
| 3812 | d += ulen; |
| 3813 | } |
| 3814 | s += u; |
| 3815 | } |
| 3816 | if (in_iota_subscript) { |
| 3817 | CAT_UNI_TO_UTF8_TWO_BYTE(d, GREEK_CAPITAL_LETTER_IOTA); |
| 3818 | } |
| 3819 | SvUTF8_on(dest); |
| 3820 | *d = '\0'; |
| 3821 | |
| 3822 | SvCUR_set(dest, d - (U8*)SvPVX_const(dest)); |
| 3823 | if (tainted) { |
| 3824 | TAINT; |
| 3825 | SvTAINTED_on(dest); |
| 3826 | } |
| 3827 | } |
| 3828 | else { /* Not UTF-8 */ |
| 3829 | if (len) { |
| 3830 | const U8 *const send = s + len; |
| 3831 | |
| 3832 | /* Use locale casing if in locale; regular style if not treating |
| 3833 | * latin1 as having case; otherwise the latin1 casing. Do the |
| 3834 | * whole thing in a tight loop, for speed, */ |
| 3835 | if (IN_LOCALE_RUNTIME) { |
| 3836 | TAINT; |
| 3837 | SvTAINTED_on(dest); |
| 3838 | for (; s < send; d++, s++) |
| 3839 | *d = toUPPER_LC(*s); |
| 3840 | } |
| 3841 | else if (! IN_UNI_8_BIT) { |
| 3842 | for (; s < send; d++, s++) { |
| 3843 | *d = toUPPER(*s); |
| 3844 | } |
| 3845 | } |
| 3846 | else { |
| 3847 | for (; s < send; d++, s++) { |
| 3848 | *d = toUPPER_LATIN1_MOD(*s); |
| 3849 | if (LIKELY(*d != LATIN_SMALL_LETTER_Y_WITH_DIAERESIS)) continue; |
| 3850 | |
| 3851 | /* The mainstream case is the tight loop above. To avoid |
| 3852 | * extra tests in that, all three characters that require |
| 3853 | * special handling are mapped by the MOD to the one tested |
| 3854 | * just above. |
| 3855 | * Use the source to distinguish between the three cases */ |
| 3856 | |
| 3857 | if (*s == LATIN_SMALL_LETTER_SHARP_S) { |
| 3858 | |
| 3859 | /* uc() of this requires 2 characters, but they are |
| 3860 | * ASCII. If not enough room, grow the string */ |
| 3861 | if (SvLEN(dest) < ++min) { |
| 3862 | const UV o = d - (U8*)SvPVX_const(dest); |
| 3863 | SvGROW(dest, min); |
| 3864 | d = (U8*)SvPVX(dest) + o; |
| 3865 | } |
| 3866 | *d++ = 'S'; *d = 'S'; /* upper case is 'SS' */ |
| 3867 | continue; /* Back to the tight loop; still in ASCII */ |
| 3868 | } |
| 3869 | |
| 3870 | /* The other two special handling characters have their |
| 3871 | * upper cases outside the latin1 range, hence need to be |
| 3872 | * in UTF-8, so the whole result needs to be in UTF-8. So, |
| 3873 | * here we are somewhere in the middle of processing a |
| 3874 | * non-UTF-8 string, and realize that we will have to convert |
| 3875 | * the whole thing to UTF-8. What to do? There are |
| 3876 | * several possibilities. The simplest to code is to |
| 3877 | * convert what we have so far, set a flag, and continue on |
| 3878 | * in the loop. The flag would be tested each time through |
| 3879 | * the loop, and if set, the next character would be |
| 3880 | * converted to UTF-8 and stored. But, I (khw) didn't want |
| 3881 | * to slow down the mainstream case at all for this fairly |
| 3882 | * rare case, so I didn't want to add a test that didn't |
| 3883 | * absolutely have to be there in the loop, besides the |
| 3884 | * possibility that it would get too complicated for |
| 3885 | * optimizers to deal with. Another possibility is to just |
| 3886 | * give up, convert the source to UTF-8, and restart the |
| 3887 | * function that way. Another possibility is to convert |
| 3888 | * both what has already been processed and what is yet to |
| 3889 | * come separately to UTF-8, then jump into the loop that |
| 3890 | * handles UTF-8. But the most efficient time-wise of the |
| 3891 | * ones I could think of is what follows, and turned out to |
| 3892 | * not require much extra code. */ |
| 3893 | |
| 3894 | /* Convert what we have so far into UTF-8, telling the |
| 3895 | * function that we know it should be converted, and to |
| 3896 | * allow extra space for what we haven't processed yet. |
| 3897 | * Assume the worst case space requirements for converting |
| 3898 | * what we haven't processed so far: that it will require |
| 3899 | * two bytes for each remaining source character, plus the |
| 3900 | * NUL at the end. This may cause the string pointer to |
| 3901 | * move, so re-find it. */ |
| 3902 | |
| 3903 | len = d - (U8*)SvPVX_const(dest); |
| 3904 | SvCUR_set(dest, len); |
| 3905 | len = sv_utf8_upgrade_flags_grow(dest, |
| 3906 | SV_GMAGIC|SV_FORCE_UTF8_UPGRADE, |
| 3907 | (send -s) * 2 + 1); |
| 3908 | d = (U8*)SvPVX(dest) + len; |
| 3909 | |
| 3910 | /* Now process the remainder of the source, converting to |
| 3911 | * upper and UTF-8. If a resulting byte is invariant in |
| 3912 | * UTF-8, output it as-is, otherwise convert to UTF-8 and |
| 3913 | * append it to the output. */ |
| 3914 | for (; s < send; s++) { |
| 3915 | (void) _to_upper_title_latin1(*s, d, &len, 'S'); |
| 3916 | d += len; |
| 3917 | } |
| 3918 | |
| 3919 | /* Here have processed the whole source; no need to continue |
| 3920 | * with the outer loop. Each character has been converted |
| 3921 | * to upper case and converted to UTF-8 */ |
| 3922 | |
| 3923 | break; |
| 3924 | } /* End of processing all latin1-style chars */ |
| 3925 | } /* End of processing all chars */ |
| 3926 | } /* End of source is not empty */ |
| 3927 | |
| 3928 | if (source != dest) { |
| 3929 | *d = '\0'; /* Here d points to 1 after last char, add NUL */ |
| 3930 | SvCUR_set(dest, d - (U8*)SvPVX_const(dest)); |
| 3931 | } |
| 3932 | } /* End of isn't utf8 */ |
| 3933 | if (dest != source && SvTAINTED(source)) |
| 3934 | SvTAINT(dest); |
| 3935 | SvSETMAGIC(dest); |
| 3936 | RETURN; |
| 3937 | } |
| 3938 | |
| 3939 | PP(pp_lc) |
| 3940 | { |
| 3941 | dVAR; |
| 3942 | dSP; |
| 3943 | SV *source = TOPs; |
| 3944 | STRLEN len; |
| 3945 | STRLEN min; |
| 3946 | SV *dest; |
| 3947 | const U8 *s; |
| 3948 | U8 *d; |
| 3949 | |
| 3950 | SvGETMAGIC(source); |
| 3951 | |
| 3952 | if (SvPADTMP(source) && !SvREADONLY(source) && !SvAMAGIC(source) |
| 3953 | && SvTEMP(source) && !DO_UTF8(source)) { |
| 3954 | |
| 3955 | /* We can convert in place, as lowercasing anything in the latin1 range |
| 3956 | * (or else DO_UTF8 would have been on) doesn't lengthen it */ |
| 3957 | dest = source; |
| 3958 | s = d = (U8*)SvPV_force_nomg(source, len); |
| 3959 | min = len + 1; |
| 3960 | } else { |
| 3961 | dTARGET; |
| 3962 | |
| 3963 | dest = TARG; |
| 3964 | |
| 3965 | /* The old implementation would copy source into TARG at this point. |
| 3966 | This had the side effect that if source was undef, TARG was now |
| 3967 | an undefined SV with PADTMP set, and they don't warn inside |
| 3968 | sv_2pv_flags(). However, we're now getting the PV direct from |
| 3969 | source, which doesn't have PADTMP set, so it would warn. Hence the |
| 3970 | little games. */ |
| 3971 | |
| 3972 | if (SvOK(source)) { |
| 3973 | s = (const U8*)SvPV_nomg_const(source, len); |
| 3974 | } else { |
| 3975 | if (ckWARN(WARN_UNINITIALIZED)) |
| 3976 | report_uninit(source); |
| 3977 | s = (const U8*)""; |
| 3978 | len = 0; |
| 3979 | } |
| 3980 | min = len + 1; |
| 3981 | |
| 3982 | SvUPGRADE(dest, SVt_PV); |
| 3983 | d = (U8*)SvGROW(dest, min); |
| 3984 | (void)SvPOK_only(dest); |
| 3985 | |
| 3986 | SETs(dest); |
| 3987 | } |
| 3988 | |
| 3989 | /* Overloaded values may have toggled the UTF-8 flag on source, so we need |
| 3990 | to check DO_UTF8 again here. */ |
| 3991 | |
| 3992 | if (DO_UTF8(source)) { |
| 3993 | const U8 *const send = s + len; |
| 3994 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1]; |
| 3995 | bool tainted = FALSE; |
| 3996 | |
| 3997 | while (s < send) { |
| 3998 | const STRLEN u = UTF8SKIP(s); |
| 3999 | STRLEN ulen; |
| 4000 | |
| 4001 | _to_utf8_lower_flags(s, tmpbuf, &ulen, |
| 4002 | cBOOL(IN_LOCALE_RUNTIME), &tainted); |
| 4003 | |
| 4004 | /* Here is where we would do context-sensitive actions. See the |
| 4005 | * commit message for this comment for why there isn't any */ |
| 4006 | |
| 4007 | if (ulen > u && (SvLEN(dest) < (min += ulen - u))) { |
| 4008 | |
| 4009 | /* If the eventually required minimum size outgrows the |
| 4010 | * available space, we need to grow. */ |
| 4011 | const UV o = d - (U8*)SvPVX_const(dest); |
| 4012 | |
| 4013 | /* If someone lowercases one million U+0130s we SvGROW() one |
| 4014 | * million times. Or we could try guessing how much to |
| 4015 | * allocate without allocating too much. Such is life. |
| 4016 | * Another option would be to grow an extra byte or two more |
| 4017 | * each time we need to grow, which would cut down the million |
| 4018 | * to 500K, with little waste */ |
| 4019 | SvGROW(dest, min); |
| 4020 | d = (U8*)SvPVX(dest) + o; |
| 4021 | } |
| 4022 | |
| 4023 | /* Copy the newly lowercased letter to the output buffer we're |
| 4024 | * building */ |
| 4025 | Copy(tmpbuf, d, ulen, U8); |
| 4026 | d += ulen; |
| 4027 | s += u; |
| 4028 | } /* End of looping through the source string */ |
| 4029 | SvUTF8_on(dest); |
| 4030 | *d = '\0'; |
| 4031 | SvCUR_set(dest, d - (U8*)SvPVX_const(dest)); |
| 4032 | if (tainted) { |
| 4033 | TAINT; |
| 4034 | SvTAINTED_on(dest); |
| 4035 | } |
| 4036 | } else { /* Not utf8 */ |
| 4037 | if (len) { |
| 4038 | const U8 *const send = s + len; |
| 4039 | |
| 4040 | /* Use locale casing if in locale; regular style if not treating |
| 4041 | * latin1 as having case; otherwise the latin1 casing. Do the |
| 4042 | * whole thing in a tight loop, for speed, */ |
| 4043 | if (IN_LOCALE_RUNTIME) { |
| 4044 | TAINT; |
| 4045 | SvTAINTED_on(dest); |
| 4046 | for (; s < send; d++, s++) |
| 4047 | *d = toLOWER_LC(*s); |
| 4048 | } |
| 4049 | else if (! IN_UNI_8_BIT) { |
| 4050 | for (; s < send; d++, s++) { |
| 4051 | *d = toLOWER(*s); |
| 4052 | } |
| 4053 | } |
| 4054 | else { |
| 4055 | for (; s < send; d++, s++) { |
| 4056 | *d = toLOWER_LATIN1(*s); |
| 4057 | } |
| 4058 | } |
| 4059 | } |
| 4060 | if (source != dest) { |
| 4061 | *d = '\0'; |
| 4062 | SvCUR_set(dest, d - (U8*)SvPVX_const(dest)); |
| 4063 | } |
| 4064 | } |
| 4065 | if (dest != source && SvTAINTED(source)) |
| 4066 | SvTAINT(dest); |
| 4067 | SvSETMAGIC(dest); |
| 4068 | RETURN; |
| 4069 | } |
| 4070 | |
| 4071 | PP(pp_quotemeta) |
| 4072 | { |
| 4073 | dVAR; dSP; dTARGET; |
| 4074 | SV * const sv = TOPs; |
| 4075 | STRLEN len; |
| 4076 | register const char *s = SvPV_const(sv,len); |
| 4077 | |
| 4078 | SvUTF8_off(TARG); /* decontaminate */ |
| 4079 | if (len) { |
| 4080 | register char *d; |
| 4081 | SvUPGRADE(TARG, SVt_PV); |
| 4082 | SvGROW(TARG, (len * 2) + 1); |
| 4083 | d = SvPVX(TARG); |
| 4084 | if (DO_UTF8(sv)) { |
| 4085 | while (len) { |
| 4086 | if (UTF8_IS_CONTINUED(*s)) { |
| 4087 | STRLEN ulen = UTF8SKIP(s); |
| 4088 | if (ulen > len) |
| 4089 | ulen = len; |
| 4090 | len -= ulen; |
| 4091 | while (ulen--) |
| 4092 | *d++ = *s++; |
| 4093 | } |
| 4094 | else { |
| 4095 | if (!isALNUM(*s)) |
| 4096 | *d++ = '\\'; |
| 4097 | *d++ = *s++; |
| 4098 | len--; |
| 4099 | } |
| 4100 | } |
| 4101 | SvUTF8_on(TARG); |
| 4102 | } |
| 4103 | else { |
| 4104 | while (len--) { |
| 4105 | if (!isALNUM(*s)) |
| 4106 | *d++ = '\\'; |
| 4107 | *d++ = *s++; |
| 4108 | } |
| 4109 | } |
| 4110 | *d = '\0'; |
| 4111 | SvCUR_set(TARG, d - SvPVX_const(TARG)); |
| 4112 | (void)SvPOK_only_UTF8(TARG); |
| 4113 | } |
| 4114 | else |
| 4115 | sv_setpvn(TARG, s, len); |
| 4116 | SETTARG; |
| 4117 | RETURN; |
| 4118 | } |
| 4119 | |
| 4120 | /* Arrays. */ |
| 4121 | |
| 4122 | PP(pp_aslice) |
| 4123 | { |
| 4124 | dVAR; dSP; dMARK; dORIGMARK; |
| 4125 | register AV *const av = MUTABLE_AV(POPs); |
| 4126 | register const I32 lval = (PL_op->op_flags & OPf_MOD || LVRET); |
| 4127 | |
| 4128 | if (SvTYPE(av) == SVt_PVAV) { |
| 4129 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
| 4130 | bool can_preserve = FALSE; |
| 4131 | |
| 4132 | if (localizing) { |
| 4133 | MAGIC *mg; |
| 4134 | HV *stash; |
| 4135 | |
| 4136 | can_preserve = SvCANEXISTDELETE(av); |
| 4137 | } |
| 4138 | |
| 4139 | if (lval && localizing) { |
| 4140 | register SV **svp; |
| 4141 | I32 max = -1; |
| 4142 | for (svp = MARK + 1; svp <= SP; svp++) { |
| 4143 | const I32 elem = SvIV(*svp); |
| 4144 | if (elem > max) |
| 4145 | max = elem; |
| 4146 | } |
| 4147 | if (max > AvMAX(av)) |
| 4148 | av_extend(av, max); |
| 4149 | } |
| 4150 | |
| 4151 | while (++MARK <= SP) { |
| 4152 | register SV **svp; |
| 4153 | I32 elem = SvIV(*MARK); |
| 4154 | bool preeminent = TRUE; |
| 4155 | |
| 4156 | if (localizing && can_preserve) { |
| 4157 | /* If we can determine whether the element exist, |
| 4158 | * Try to preserve the existenceness of a tied array |
| 4159 | * element by using EXISTS and DELETE if possible. |
| 4160 | * Fallback to FETCH and STORE otherwise. */ |
| 4161 | preeminent = av_exists(av, elem); |
| 4162 | } |
| 4163 | |
| 4164 | svp = av_fetch(av, elem, lval); |
| 4165 | if (lval) { |
| 4166 | if (!svp || *svp == &PL_sv_undef) |
| 4167 | DIE(aTHX_ PL_no_aelem, elem); |
| 4168 | if (localizing) { |
| 4169 | if (preeminent) |
| 4170 | save_aelem(av, elem, svp); |
| 4171 | else |
| 4172 | SAVEADELETE(av, elem); |
| 4173 | } |
| 4174 | } |
| 4175 | *MARK = svp ? *svp : &PL_sv_undef; |
| 4176 | } |
| 4177 | } |
| 4178 | if (GIMME != G_ARRAY) { |
| 4179 | MARK = ORIGMARK; |
| 4180 | *++MARK = SP > ORIGMARK ? *SP : &PL_sv_undef; |
| 4181 | SP = MARK; |
| 4182 | } |
| 4183 | RETURN; |
| 4184 | } |
| 4185 | |
| 4186 | /* Smart dereferencing for keys, values and each */ |
| 4187 | PP(pp_rkeys) |
| 4188 | { |
| 4189 | dVAR; |
| 4190 | dSP; |
| 4191 | dPOPss; |
| 4192 | |
| 4193 | SvGETMAGIC(sv); |
| 4194 | |
| 4195 | if ( |
| 4196 | !SvROK(sv) |
| 4197 | || (sv = SvRV(sv), |
| 4198 | (SvTYPE(sv) != SVt_PVHV && SvTYPE(sv) != SVt_PVAV) |
| 4199 | || SvOBJECT(sv) |
| 4200 | ) |
| 4201 | ) { |
| 4202 | DIE(aTHX_ |
| 4203 | "Type of argument to %s must be unblessed hashref or arrayref", |
| 4204 | PL_op_desc[PL_op->op_type] ); |
| 4205 | } |
| 4206 | |
| 4207 | if (PL_op->op_flags & OPf_SPECIAL && SvTYPE(sv) == SVt_PVAV) |
| 4208 | DIE(aTHX_ |
| 4209 | "Can't modify %s in %s", |
| 4210 | PL_op_desc[PL_op->op_type], PL_op_desc[PL_op->op_next->op_type] |
| 4211 | ); |
| 4212 | |
| 4213 | /* Delegate to correct function for op type */ |
| 4214 | PUSHs(sv); |
| 4215 | if (PL_op->op_type == OP_RKEYS || PL_op->op_type == OP_RVALUES) { |
| 4216 | return (SvTYPE(sv) == SVt_PVHV) ? Perl_do_kv(aTHX) : Perl_pp_akeys(aTHX); |
| 4217 | } |
| 4218 | else { |
| 4219 | return (SvTYPE(sv) == SVt_PVHV) ? Perl_pp_each(aTHX) : Perl_pp_aeach(aTHX); |
| 4220 | } |
| 4221 | } |
| 4222 | |
| 4223 | PP(pp_aeach) |
| 4224 | { |
| 4225 | dVAR; |
| 4226 | dSP; |
| 4227 | AV *array = MUTABLE_AV(POPs); |
| 4228 | const I32 gimme = GIMME_V; |
| 4229 | IV *iterp = Perl_av_iter_p(aTHX_ array); |
| 4230 | const IV current = (*iterp)++; |
| 4231 | |
| 4232 | if (current > av_len(array)) { |
| 4233 | *iterp = 0; |
| 4234 | if (gimme == G_SCALAR) |
| 4235 | RETPUSHUNDEF; |
| 4236 | else |
| 4237 | RETURN; |
| 4238 | } |
| 4239 | |
| 4240 | EXTEND(SP, 2); |
| 4241 | mPUSHi(current); |
| 4242 | if (gimme == G_ARRAY) { |
| 4243 | SV **const element = av_fetch(array, current, 0); |
| 4244 | PUSHs(element ? *element : &PL_sv_undef); |
| 4245 | } |
| 4246 | RETURN; |
| 4247 | } |
| 4248 | |
| 4249 | PP(pp_akeys) |
| 4250 | { |
| 4251 | dVAR; |
| 4252 | dSP; |
| 4253 | AV *array = MUTABLE_AV(POPs); |
| 4254 | const I32 gimme = GIMME_V; |
| 4255 | |
| 4256 | *Perl_av_iter_p(aTHX_ array) = 0; |
| 4257 | |
| 4258 | if (gimme == G_SCALAR) { |
| 4259 | dTARGET; |
| 4260 | PUSHi(av_len(array) + 1); |
| 4261 | } |
| 4262 | else if (gimme == G_ARRAY) { |
| 4263 | IV n = Perl_av_len(aTHX_ array); |
| 4264 | IV i; |
| 4265 | |
| 4266 | EXTEND(SP, n + 1); |
| 4267 | |
| 4268 | if (PL_op->op_type == OP_AKEYS || PL_op->op_type == OP_RKEYS) { |
| 4269 | for (i = 0; i <= n; i++) { |
| 4270 | mPUSHi(i); |
| 4271 | } |
| 4272 | } |
| 4273 | else { |
| 4274 | for (i = 0; i <= n; i++) { |
| 4275 | SV *const *const elem = Perl_av_fetch(aTHX_ array, i, 0); |
| 4276 | PUSHs(elem ? *elem : &PL_sv_undef); |
| 4277 | } |
| 4278 | } |
| 4279 | } |
| 4280 | RETURN; |
| 4281 | } |
| 4282 | |
| 4283 | /* Associative arrays. */ |
| 4284 | |
| 4285 | PP(pp_each) |
| 4286 | { |
| 4287 | dVAR; |
| 4288 | dSP; |
| 4289 | HV * hash = MUTABLE_HV(POPs); |
| 4290 | HE *entry; |
| 4291 | const I32 gimme = GIMME_V; |
| 4292 | |
| 4293 | PUTBACK; |
| 4294 | /* might clobber stack_sp */ |
| 4295 | entry = hv_iternext(hash); |
| 4296 | SPAGAIN; |
| 4297 | |
| 4298 | EXTEND(SP, 2); |
| 4299 | if (entry) { |
| 4300 | SV* const sv = hv_iterkeysv(entry); |
| 4301 | PUSHs(sv); /* won't clobber stack_sp */ |
| 4302 | if (gimme == G_ARRAY) { |
| 4303 | SV *val; |
| 4304 | PUTBACK; |
| 4305 | /* might clobber stack_sp */ |
| 4306 | val = hv_iterval(hash, entry); |
| 4307 | SPAGAIN; |
| 4308 | PUSHs(val); |
| 4309 | } |
| 4310 | } |
| 4311 | else if (gimme == G_SCALAR) |
| 4312 | RETPUSHUNDEF; |
| 4313 | |
| 4314 | RETURN; |
| 4315 | } |
| 4316 | |
| 4317 | STATIC OP * |
| 4318 | S_do_delete_local(pTHX) |
| 4319 | { |
| 4320 | dVAR; |
| 4321 | dSP; |
| 4322 | const I32 gimme = GIMME_V; |
| 4323 | const MAGIC *mg; |
| 4324 | HV *stash; |
| 4325 | |
| 4326 | if (PL_op->op_private & OPpSLICE) { |
| 4327 | dMARK; dORIGMARK; |
| 4328 | SV * const osv = POPs; |
| 4329 | const bool tied = SvRMAGICAL(osv) |
| 4330 | && mg_find((const SV *)osv, PERL_MAGIC_tied); |
| 4331 | const bool can_preserve = SvCANEXISTDELETE(osv) |
| 4332 | || mg_find((const SV *)osv, PERL_MAGIC_env); |
| 4333 | const U32 type = SvTYPE(osv); |
| 4334 | if (type == SVt_PVHV) { /* hash element */ |
| 4335 | HV * const hv = MUTABLE_HV(osv); |
| 4336 | while (++MARK <= SP) { |
| 4337 | SV * const keysv = *MARK; |
| 4338 | SV *sv = NULL; |
| 4339 | bool preeminent = TRUE; |
| 4340 | if (can_preserve) |
| 4341 | preeminent = hv_exists_ent(hv, keysv, 0); |
| 4342 | if (tied) { |
| 4343 | HE *he = hv_fetch_ent(hv, keysv, 1, 0); |
| 4344 | if (he) |
| 4345 | sv = HeVAL(he); |
| 4346 | else |
| 4347 | preeminent = FALSE; |
| 4348 | } |
| 4349 | else { |
| 4350 | sv = hv_delete_ent(hv, keysv, 0, 0); |
| 4351 | SvREFCNT_inc_simple_void(sv); /* De-mortalize */ |
| 4352 | } |
| 4353 | if (preeminent) { |
| 4354 | save_helem_flags(hv, keysv, &sv, SAVEf_KEEPOLDELEM); |
| 4355 | if (tied) { |
| 4356 | *MARK = sv_mortalcopy(sv); |
| 4357 | mg_clear(sv); |
| 4358 | } else |
| 4359 | *MARK = sv; |
| 4360 | } |
| 4361 | else { |
| 4362 | SAVEHDELETE(hv, keysv); |
| 4363 | *MARK = &PL_sv_undef; |
| 4364 | } |
| 4365 | } |
| 4366 | } |
| 4367 | else if (type == SVt_PVAV) { /* array element */ |
| 4368 | if (PL_op->op_flags & OPf_SPECIAL) { |
| 4369 | AV * const av = MUTABLE_AV(osv); |
| 4370 | while (++MARK <= SP) { |
| 4371 | I32 idx = SvIV(*MARK); |
| 4372 | SV *sv = NULL; |
| 4373 | bool preeminent = TRUE; |
| 4374 | if (can_preserve) |
| 4375 | preeminent = av_exists(av, idx); |
| 4376 | if (tied) { |
| 4377 | SV **svp = av_fetch(av, idx, 1); |
| 4378 | if (svp) |
| 4379 | sv = *svp; |
| 4380 | else |
| 4381 | preeminent = FALSE; |
| 4382 | } |
| 4383 | else { |
| 4384 | sv = av_delete(av, idx, 0); |
| 4385 | SvREFCNT_inc_simple_void(sv); /* De-mortalize */ |
| 4386 | } |
| 4387 | if (preeminent) { |
| 4388 | save_aelem_flags(av, idx, &sv, SAVEf_KEEPOLDELEM); |
| 4389 | if (tied) { |
| 4390 | *MARK = sv_mortalcopy(sv); |
| 4391 | mg_clear(sv); |
| 4392 | } else |
| 4393 | *MARK = sv; |
| 4394 | } |
| 4395 | else { |
| 4396 | SAVEADELETE(av, idx); |
| 4397 | *MARK = &PL_sv_undef; |
| 4398 | } |
| 4399 | } |
| 4400 | } |
| 4401 | } |
| 4402 | else |
| 4403 | DIE(aTHX_ "Not a HASH reference"); |
| 4404 | if (gimme == G_VOID) |
| 4405 | SP = ORIGMARK; |
| 4406 | else if (gimme == G_SCALAR) { |
| 4407 | MARK = ORIGMARK; |
| 4408 | if (SP > MARK) |
| 4409 | *++MARK = *SP; |
| 4410 | else |
| 4411 | *++MARK = &PL_sv_undef; |
| 4412 | SP = MARK; |
| 4413 | } |
| 4414 | } |
| 4415 | else { |
| 4416 | SV * const keysv = POPs; |
| 4417 | SV * const osv = POPs; |
| 4418 | const bool tied = SvRMAGICAL(osv) |
| 4419 | && mg_find((const SV *)osv, PERL_MAGIC_tied); |
| 4420 | const bool can_preserve = SvCANEXISTDELETE(osv) |
| 4421 | || mg_find((const SV *)osv, PERL_MAGIC_env); |
| 4422 | const U32 type = SvTYPE(osv); |
| 4423 | SV *sv = NULL; |
| 4424 | if (type == SVt_PVHV) { |
| 4425 | HV * const hv = MUTABLE_HV(osv); |
| 4426 | bool preeminent = TRUE; |
| 4427 | if (can_preserve) |
| 4428 | preeminent = hv_exists_ent(hv, keysv, 0); |
| 4429 | if (tied) { |
| 4430 | HE *he = hv_fetch_ent(hv, keysv, 1, 0); |
| 4431 | if (he) |
| 4432 | sv = HeVAL(he); |
| 4433 | else |
| 4434 | preeminent = FALSE; |
| 4435 | } |
| 4436 | else { |
| 4437 | sv = hv_delete_ent(hv, keysv, 0, 0); |
| 4438 | SvREFCNT_inc_simple_void(sv); /* De-mortalize */ |
| 4439 | } |
| 4440 | if (preeminent) { |
| 4441 | save_helem_flags(hv, keysv, &sv, SAVEf_KEEPOLDELEM); |
| 4442 | if (tied) { |
| 4443 | SV *nsv = sv_mortalcopy(sv); |
| 4444 | mg_clear(sv); |
| 4445 | sv = nsv; |
| 4446 | } |
| 4447 | } |
| 4448 | else |
| 4449 | SAVEHDELETE(hv, keysv); |
| 4450 | } |
| 4451 | else if (type == SVt_PVAV) { |
| 4452 | if (PL_op->op_flags & OPf_SPECIAL) { |
| 4453 | AV * const av = MUTABLE_AV(osv); |
| 4454 | I32 idx = SvIV(keysv); |
| 4455 | bool preeminent = TRUE; |
| 4456 | if (can_preserve) |
| 4457 | preeminent = av_exists(av, idx); |
| 4458 | if (tied) { |
| 4459 | SV **svp = av_fetch(av, idx, 1); |
| 4460 | if (svp) |
| 4461 | sv = *svp; |
| 4462 | else |
| 4463 | preeminent = FALSE; |
| 4464 | } |
| 4465 | else { |
| 4466 | sv = av_delete(av, idx, 0); |
| 4467 | SvREFCNT_inc_simple_void(sv); /* De-mortalize */ |
| 4468 | } |
| 4469 | if (preeminent) { |
| 4470 | save_aelem_flags(av, idx, &sv, SAVEf_KEEPOLDELEM); |
| 4471 | if (tied) { |
| 4472 | SV *nsv = sv_mortalcopy(sv); |
| 4473 | mg_clear(sv); |
| 4474 | sv = nsv; |
| 4475 | } |
| 4476 | } |
| 4477 | else |
| 4478 | SAVEADELETE(av, idx); |
| 4479 | } |
| 4480 | else |
| 4481 | DIE(aTHX_ "panic: avhv_delete no longer supported"); |
| 4482 | } |
| 4483 | else |
| 4484 | DIE(aTHX_ "Not a HASH reference"); |
| 4485 | if (!sv) |
| 4486 | sv = &PL_sv_undef; |
| 4487 | if (gimme != G_VOID) |
| 4488 | PUSHs(sv); |
| 4489 | } |
| 4490 | |
| 4491 | RETURN; |
| 4492 | } |
| 4493 | |
| 4494 | PP(pp_delete) |
| 4495 | { |
| 4496 | dVAR; |
| 4497 | dSP; |
| 4498 | I32 gimme; |
| 4499 | I32 discard; |
| 4500 | |
| 4501 | if (PL_op->op_private & OPpLVAL_INTRO) |
| 4502 | return do_delete_local(); |
| 4503 | |
| 4504 | gimme = GIMME_V; |
| 4505 | discard = (gimme == G_VOID) ? G_DISCARD : 0; |
| 4506 | |
| 4507 | if (PL_op->op_private & OPpSLICE) { |
| 4508 | dMARK; dORIGMARK; |
| 4509 | HV * const hv = MUTABLE_HV(POPs); |
| 4510 | const U32 hvtype = SvTYPE(hv); |
| 4511 | if (hvtype == SVt_PVHV) { /* hash element */ |
| 4512 | while (++MARK <= SP) { |
| 4513 | SV * const sv = hv_delete_ent(hv, *MARK, discard, 0); |
| 4514 | *MARK = sv ? sv : &PL_sv_undef; |
| 4515 | } |
| 4516 | } |
| 4517 | else if (hvtype == SVt_PVAV) { /* array element */ |
| 4518 | if (PL_op->op_flags & OPf_SPECIAL) { |
| 4519 | while (++MARK <= SP) { |
| 4520 | SV * const sv = av_delete(MUTABLE_AV(hv), SvIV(*MARK), discard); |
| 4521 | *MARK = sv ? sv : &PL_sv_undef; |
| 4522 | } |
| 4523 | } |
| 4524 | } |
| 4525 | else |
| 4526 | DIE(aTHX_ "Not a HASH reference"); |
| 4527 | if (discard) |
| 4528 | SP = ORIGMARK; |
| 4529 | else if (gimme == G_SCALAR) { |
| 4530 | MARK = ORIGMARK; |
| 4531 | if (SP > MARK) |
| 4532 | *++MARK = *SP; |
| 4533 | else |
| 4534 | *++MARK = &PL_sv_undef; |
| 4535 | SP = MARK; |
| 4536 | } |
| 4537 | } |
| 4538 | else { |
| 4539 | SV *keysv = POPs; |
| 4540 | HV * const hv = MUTABLE_HV(POPs); |
| 4541 | SV *sv = NULL; |
| 4542 | if (SvTYPE(hv) == SVt_PVHV) |
| 4543 | sv = hv_delete_ent(hv, keysv, discard, 0); |
| 4544 | else if (SvTYPE(hv) == SVt_PVAV) { |
| 4545 | if (PL_op->op_flags & OPf_SPECIAL) |
| 4546 | sv = av_delete(MUTABLE_AV(hv), SvIV(keysv), discard); |
| 4547 | else |
| 4548 | DIE(aTHX_ "panic: avhv_delete no longer supported"); |
| 4549 | } |
| 4550 | else |
| 4551 | DIE(aTHX_ "Not a HASH reference"); |
| 4552 | if (!sv) |
| 4553 | sv = &PL_sv_undef; |
| 4554 | if (!discard) |
| 4555 | PUSHs(sv); |
| 4556 | } |
| 4557 | RETURN; |
| 4558 | } |
| 4559 | |
| 4560 | PP(pp_exists) |
| 4561 | { |
| 4562 | dVAR; |
| 4563 | dSP; |
| 4564 | SV *tmpsv; |
| 4565 | HV *hv; |
| 4566 | |
| 4567 | if (PL_op->op_private & OPpEXISTS_SUB) { |
| 4568 | GV *gv; |
| 4569 | SV * const sv = POPs; |
| 4570 | CV * const cv = sv_2cv(sv, &hv, &gv, 0); |
| 4571 | if (cv) |
| 4572 | RETPUSHYES; |
| 4573 | if (gv && isGV(gv) && GvCV(gv) && !GvCVGEN(gv)) |
| 4574 | RETPUSHYES; |
| 4575 | RETPUSHNO; |
| 4576 | } |
| 4577 | tmpsv = POPs; |
| 4578 | hv = MUTABLE_HV(POPs); |
| 4579 | if (SvTYPE(hv) == SVt_PVHV) { |
| 4580 | if (hv_exists_ent(hv, tmpsv, 0)) |
| 4581 | RETPUSHYES; |
| 4582 | } |
| 4583 | else if (SvTYPE(hv) == SVt_PVAV) { |
| 4584 | if (PL_op->op_flags & OPf_SPECIAL) { /* array element */ |
| 4585 | if (av_exists(MUTABLE_AV(hv), SvIV(tmpsv))) |
| 4586 | RETPUSHYES; |
| 4587 | } |
| 4588 | } |
| 4589 | else { |
| 4590 | DIE(aTHX_ "Not a HASH reference"); |
| 4591 | } |
| 4592 | RETPUSHNO; |
| 4593 | } |
| 4594 | |
| 4595 | PP(pp_hslice) |
| 4596 | { |
| 4597 | dVAR; dSP; dMARK; dORIGMARK; |
| 4598 | register HV * const hv = MUTABLE_HV(POPs); |
| 4599 | register const I32 lval = (PL_op->op_flags & OPf_MOD || LVRET); |
| 4600 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
| 4601 | bool can_preserve = FALSE; |
| 4602 | |
| 4603 | if (localizing) { |
| 4604 | MAGIC *mg; |
| 4605 | HV *stash; |
| 4606 | |
| 4607 | if (SvCANEXISTDELETE(hv) || mg_find((const SV *)hv, PERL_MAGIC_env)) |
| 4608 | can_preserve = TRUE; |
| 4609 | } |
| 4610 | |
| 4611 | while (++MARK <= SP) { |
| 4612 | SV * const keysv = *MARK; |
| 4613 | SV **svp; |
| 4614 | HE *he; |
| 4615 | bool preeminent = TRUE; |
| 4616 | |
| 4617 | if (localizing && can_preserve) { |
| 4618 | /* If we can determine whether the element exist, |
| 4619 | * try to preserve the existenceness of a tied hash |
| 4620 | * element by using EXISTS and DELETE if possible. |
| 4621 | * Fallback to FETCH and STORE otherwise. */ |
| 4622 | preeminent = hv_exists_ent(hv, keysv, 0); |
| 4623 | } |
| 4624 | |
| 4625 | he = hv_fetch_ent(hv, keysv, lval, 0); |
| 4626 | svp = he ? &HeVAL(he) : NULL; |
| 4627 | |
| 4628 | if (lval) { |
| 4629 | if (!svp || !*svp || *svp == &PL_sv_undef) { |
| 4630 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); |
| 4631 | } |
| 4632 | if (localizing) { |
| 4633 | if (HvNAME_get(hv) && isGV(*svp)) |
| 4634 | save_gp(MUTABLE_GV(*svp), !(PL_op->op_flags & OPf_SPECIAL)); |
| 4635 | else if (preeminent) |
| 4636 | save_helem_flags(hv, keysv, svp, |
| 4637 | (PL_op->op_flags & OPf_SPECIAL) ? 0 : SAVEf_SETMAGIC); |
| 4638 | else |
| 4639 | SAVEHDELETE(hv, keysv); |
| 4640 | } |
| 4641 | } |
| 4642 | *MARK = svp && *svp ? *svp : &PL_sv_undef; |
| 4643 | } |
| 4644 | if (GIMME != G_ARRAY) { |
| 4645 | MARK = ORIGMARK; |
| 4646 | *++MARK = SP > ORIGMARK ? *SP : &PL_sv_undef; |
| 4647 | SP = MARK; |
| 4648 | } |
| 4649 | RETURN; |
| 4650 | } |
| 4651 | |
| 4652 | /* List operators. */ |
| 4653 | |
| 4654 | PP(pp_list) |
| 4655 | { |
| 4656 | dVAR; dSP; dMARK; |
| 4657 | if (GIMME != G_ARRAY) { |
| 4658 | if (++MARK <= SP) |
| 4659 | *MARK = *SP; /* unwanted list, return last item */ |
| 4660 | else |
| 4661 | *MARK = &PL_sv_undef; |
| 4662 | SP = MARK; |
| 4663 | } |
| 4664 | RETURN; |
| 4665 | } |
| 4666 | |
| 4667 | PP(pp_lslice) |
| 4668 | { |
| 4669 | dVAR; |
| 4670 | dSP; |
| 4671 | SV ** const lastrelem = PL_stack_sp; |
| 4672 | SV ** const lastlelem = PL_stack_base + POPMARK; |
| 4673 | SV ** const firstlelem = PL_stack_base + POPMARK + 1; |
| 4674 | register SV ** const firstrelem = lastlelem + 1; |
| 4675 | I32 is_something_there = FALSE; |
| 4676 | |
| 4677 | register const I32 max = lastrelem - lastlelem; |
| 4678 | register SV **lelem; |
| 4679 | |
| 4680 | if (GIMME != G_ARRAY) { |
| 4681 | I32 ix = SvIV(*lastlelem); |
| 4682 | if (ix < 0) |
| 4683 | ix += max; |
| 4684 | if (ix < 0 || ix >= max) |
| 4685 | *firstlelem = &PL_sv_undef; |
| 4686 | else |
| 4687 | *firstlelem = firstrelem[ix]; |
| 4688 | SP = firstlelem; |
| 4689 | RETURN; |
| 4690 | } |
| 4691 | |
| 4692 | if (max == 0) { |
| 4693 | SP = firstlelem - 1; |
| 4694 | RETURN; |
| 4695 | } |
| 4696 | |
| 4697 | for (lelem = firstlelem; lelem <= lastlelem; lelem++) { |
| 4698 | I32 ix = SvIV(*lelem); |
| 4699 | if (ix < 0) |
| 4700 | ix += max; |
| 4701 | if (ix < 0 || ix >= max) |
| 4702 | *lelem = &PL_sv_undef; |
| 4703 | else { |
| 4704 | is_something_there = TRUE; |
| 4705 | if (!(*lelem = firstrelem[ix])) |
| 4706 | *lelem = &PL_sv_undef; |
| 4707 | } |
| 4708 | } |
| 4709 | if (is_something_there) |
| 4710 | SP = lastlelem; |
| 4711 | else |
| 4712 | SP = firstlelem - 1; |
| 4713 | RETURN; |
| 4714 | } |
| 4715 | |
| 4716 | PP(pp_anonlist) |
| 4717 | { |
| 4718 | dVAR; dSP; dMARK; dORIGMARK; |
| 4719 | const I32 items = SP - MARK; |
| 4720 | SV * const av = MUTABLE_SV(av_make(items, MARK+1)); |
| 4721 | SP = ORIGMARK; /* av_make() might realloc stack_sp */ |
| 4722 | mXPUSHs((PL_op->op_flags & OPf_SPECIAL) |
| 4723 | ? newRV_noinc(av) : av); |
| 4724 | RETURN; |
| 4725 | } |
| 4726 | |
| 4727 | PP(pp_anonhash) |
| 4728 | { |
| 4729 | dVAR; dSP; dMARK; dORIGMARK; |
| 4730 | HV* const hv = newHV(); |
| 4731 | |
| 4732 | while (MARK < SP) { |
| 4733 | SV * const key = *++MARK; |
| 4734 | SV * const val = newSV(0); |
| 4735 | if (MARK < SP) |
| 4736 | sv_setsv(val, *++MARK); |
| 4737 | else |
| 4738 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "Odd number of elements in anonymous hash"); |
| 4739 | (void)hv_store_ent(hv,key,val,0); |
| 4740 | } |
| 4741 | SP = ORIGMARK; |
| 4742 | mXPUSHs((PL_op->op_flags & OPf_SPECIAL) |
| 4743 | ? newRV_noinc(MUTABLE_SV(hv)) : MUTABLE_SV(hv)); |
| 4744 | RETURN; |
| 4745 | } |
| 4746 | |
| 4747 | static AV * |
| 4748 | S_deref_plain_array(pTHX_ AV *ary) |
| 4749 | { |
| 4750 | if (SvTYPE(ary) == SVt_PVAV) return ary; |
| 4751 | SvGETMAGIC((SV *)ary); |
| 4752 | if (!SvROK(ary) || SvTYPE(SvRV(ary)) != SVt_PVAV) |
| 4753 | Perl_die(aTHX_ "Not an ARRAY reference"); |
| 4754 | else if (SvOBJECT(SvRV(ary))) |
| 4755 | Perl_die(aTHX_ "Not an unblessed ARRAY reference"); |
| 4756 | return (AV *)SvRV(ary); |
| 4757 | } |
| 4758 | |
| 4759 | #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN) |
| 4760 | # define DEREF_PLAIN_ARRAY(ary) \ |
| 4761 | ({ \ |
| 4762 | AV *aRrRay = ary; \ |
| 4763 | SvTYPE(aRrRay) == SVt_PVAV \ |
| 4764 | ? aRrRay \ |
| 4765 | : S_deref_plain_array(aTHX_ aRrRay); \ |
| 4766 | }) |
| 4767 | #else |
| 4768 | # define DEREF_PLAIN_ARRAY(ary) \ |
| 4769 | ( \ |
| 4770 | PL_Sv = (SV *)(ary), \ |
| 4771 | SvTYPE(PL_Sv) == SVt_PVAV \ |
| 4772 | ? (AV *)PL_Sv \ |
| 4773 | : S_deref_plain_array(aTHX_ (AV *)PL_Sv) \ |
| 4774 | ) |
| 4775 | #endif |
| 4776 | |
| 4777 | PP(pp_splice) |
| 4778 | { |
| 4779 | dVAR; dSP; dMARK; dORIGMARK; |
| 4780 | int num_args = (SP - MARK); |
| 4781 | register AV *ary = DEREF_PLAIN_ARRAY(MUTABLE_AV(*++MARK)); |
| 4782 | register SV **src; |
| 4783 | register SV **dst; |
| 4784 | register I32 i; |
| 4785 | register I32 offset; |
| 4786 | register I32 length; |
| 4787 | I32 newlen; |
| 4788 | I32 after; |
| 4789 | I32 diff; |
| 4790 | const MAGIC * const mg = SvTIED_mg((const SV *)ary, PERL_MAGIC_tied); |
| 4791 | |
| 4792 | if (mg) { |
| 4793 | return Perl_tied_method(aTHX_ "SPLICE", mark - 1, MUTABLE_SV(ary), mg, |
| 4794 | GIMME_V | TIED_METHOD_ARGUMENTS_ON_STACK, |
| 4795 | sp - mark); |
| 4796 | } |
| 4797 | |
| 4798 | SP++; |
| 4799 | |
| 4800 | if (++MARK < SP) { |
| 4801 | offset = i = SvIV(*MARK); |
| 4802 | if (offset < 0) |
| 4803 | offset += AvFILLp(ary) + 1; |
| 4804 | if (offset < 0) |
| 4805 | DIE(aTHX_ PL_no_aelem, i); |
| 4806 | if (++MARK < SP) { |
| 4807 | length = SvIVx(*MARK++); |
| 4808 | if (length < 0) { |
| 4809 | length += AvFILLp(ary) - offset + 1; |
| 4810 | if (length < 0) |
| 4811 | length = 0; |
| 4812 | } |
| 4813 | } |
| 4814 | else |
| 4815 | length = AvMAX(ary) + 1; /* close enough to infinity */ |
| 4816 | } |
| 4817 | else { |
| 4818 | offset = 0; |
| 4819 | length = AvMAX(ary) + 1; |
| 4820 | } |
| 4821 | if (offset > AvFILLp(ary) + 1) { |
| 4822 | if (num_args > 2) |
| 4823 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "splice() offset past end of array" ); |
| 4824 | offset = AvFILLp(ary) + 1; |
| 4825 | } |
| 4826 | after = AvFILLp(ary) + 1 - (offset + length); |
| 4827 | if (after < 0) { /* not that much array */ |
| 4828 | length += after; /* offset+length now in array */ |
| 4829 | after = 0; |
| 4830 | if (!AvALLOC(ary)) |
| 4831 | av_extend(ary, 0); |
| 4832 | } |
| 4833 | |
| 4834 | /* At this point, MARK .. SP-1 is our new LIST */ |
| 4835 | |
| 4836 | newlen = SP - MARK; |
| 4837 | diff = newlen - length; |
| 4838 | if (newlen && !AvREAL(ary) && AvREIFY(ary)) |
| 4839 | av_reify(ary); |
| 4840 | |
| 4841 | /* make new elements SVs now: avoid problems if they're from the array */ |
| 4842 | for (dst = MARK, i = newlen; i; i--) { |
| 4843 | SV * const h = *dst; |
| 4844 | *dst++ = newSVsv(h); |
| 4845 | } |
| 4846 | |
| 4847 | if (diff < 0) { /* shrinking the area */ |
| 4848 | SV **tmparyval = NULL; |
| 4849 | if (newlen) { |
| 4850 | Newx(tmparyval, newlen, SV*); /* so remember insertion */ |
| 4851 | Copy(MARK, tmparyval, newlen, SV*); |
| 4852 | } |
| 4853 | |
| 4854 | MARK = ORIGMARK + 1; |
| 4855 | if (GIMME == G_ARRAY) { /* copy return vals to stack */ |
| 4856 | MEXTEND(MARK, length); |
| 4857 | Copy(AvARRAY(ary)+offset, MARK, length, SV*); |
| 4858 | if (AvREAL(ary)) { |
| 4859 | EXTEND_MORTAL(length); |
| 4860 | for (i = length, dst = MARK; i; i--) { |
| 4861 | sv_2mortal(*dst); /* free them eventually */ |
| 4862 | dst++; |
| 4863 | } |
| 4864 | } |
| 4865 | MARK += length - 1; |
| 4866 | } |
| 4867 | else { |
| 4868 | *MARK = AvARRAY(ary)[offset+length-1]; |
| 4869 | if (AvREAL(ary)) { |
| 4870 | sv_2mortal(*MARK); |
| 4871 | for (i = length - 1, dst = &AvARRAY(ary)[offset]; i > 0; i--) |
| 4872 | SvREFCNT_dec(*dst++); /* free them now */ |
| 4873 | } |
| 4874 | } |
| 4875 | AvFILLp(ary) += diff; |
| 4876 | |
| 4877 | /* pull up or down? */ |
| 4878 | |
| 4879 | if (offset < after) { /* easier to pull up */ |
| 4880 | if (offset) { /* esp. if nothing to pull */ |
| 4881 | src = &AvARRAY(ary)[offset-1]; |
| 4882 | dst = src - diff; /* diff is negative */ |
| 4883 | for (i = offset; i > 0; i--) /* can't trust Copy */ |
| 4884 | *dst-- = *src--; |
| 4885 | } |
| 4886 | dst = AvARRAY(ary); |
| 4887 | AvARRAY(ary) = AvARRAY(ary) - diff; /* diff is negative */ |
| 4888 | AvMAX(ary) += diff; |
| 4889 | } |
| 4890 | else { |
| 4891 | if (after) { /* anything to pull down? */ |
| 4892 | src = AvARRAY(ary) + offset + length; |
| 4893 | dst = src + diff; /* diff is negative */ |
| 4894 | Move(src, dst, after, SV*); |
| 4895 | } |
| 4896 | dst = &AvARRAY(ary)[AvFILLp(ary)+1]; |
| 4897 | /* avoid later double free */ |
| 4898 | } |
| 4899 | i = -diff; |
| 4900 | while (i) |
| 4901 | dst[--i] = &PL_sv_undef; |
| 4902 | |
| 4903 | if (newlen) { |
| 4904 | Copy( tmparyval, AvARRAY(ary) + offset, newlen, SV* ); |
| 4905 | Safefree(tmparyval); |
| 4906 | } |
| 4907 | } |
| 4908 | else { /* no, expanding (or same) */ |
| 4909 | SV** tmparyval = NULL; |
| 4910 | if (length) { |
| 4911 | Newx(tmparyval, length, SV*); /* so remember deletion */ |
| 4912 | Copy(AvARRAY(ary)+offset, tmparyval, length, SV*); |
| 4913 | } |
| 4914 | |
| 4915 | if (diff > 0) { /* expanding */ |
| 4916 | /* push up or down? */ |
| 4917 | if (offset < after && diff <= AvARRAY(ary) - AvALLOC(ary)) { |
| 4918 | if (offset) { |
| 4919 | src = AvARRAY(ary); |
| 4920 | dst = src - diff; |
| 4921 | Move(src, dst, offset, SV*); |
| 4922 | } |
| 4923 | AvARRAY(ary) = AvARRAY(ary) - diff;/* diff is positive */ |
| 4924 | AvMAX(ary) += diff; |
| 4925 | AvFILLp(ary) += diff; |
| 4926 | } |
| 4927 | else { |
| 4928 | if (AvFILLp(ary) + diff >= AvMAX(ary)) /* oh, well */ |
| 4929 | av_extend(ary, AvFILLp(ary) + diff); |
| 4930 | AvFILLp(ary) += diff; |
| 4931 | |
| 4932 | if (after) { |
| 4933 | dst = AvARRAY(ary) + AvFILLp(ary); |
| 4934 | src = dst - diff; |
| 4935 | for (i = after; i; i--) { |
| 4936 | *dst-- = *src--; |
| 4937 | } |
| 4938 | } |
| 4939 | } |
| 4940 | } |
| 4941 | |
| 4942 | if (newlen) { |
| 4943 | Copy( MARK, AvARRAY(ary) + offset, newlen, SV* ); |
| 4944 | } |
| 4945 | |
| 4946 | MARK = ORIGMARK + 1; |
| 4947 | if (GIMME == G_ARRAY) { /* copy return vals to stack */ |
| 4948 | if (length) { |
| 4949 | Copy(tmparyval, MARK, length, SV*); |
| 4950 | if (AvREAL(ary)) { |
| 4951 | EXTEND_MORTAL(length); |
| 4952 | for (i = length, dst = MARK; i; i--) { |
| 4953 | sv_2mortal(*dst); /* free them eventually */ |
| 4954 | dst++; |
| 4955 | } |
| 4956 | } |
| 4957 | } |
| 4958 | MARK += length - 1; |
| 4959 | } |
| 4960 | else if (length--) { |
| 4961 | *MARK = tmparyval[length]; |
| 4962 | if (AvREAL(ary)) { |
| 4963 | sv_2mortal(*MARK); |
| 4964 | while (length-- > 0) |
| 4965 | SvREFCNT_dec(tmparyval[length]); |
| 4966 | } |
| 4967 | } |
| 4968 | else |
| 4969 | *MARK = &PL_sv_undef; |
| 4970 | Safefree(tmparyval); |
| 4971 | } |
| 4972 | |
| 4973 | if (SvMAGICAL(ary)) |
| 4974 | mg_set(MUTABLE_SV(ary)); |
| 4975 | |
| 4976 | SP = MARK; |
| 4977 | RETURN; |
| 4978 | } |
| 4979 | |
| 4980 | PP(pp_push) |
| 4981 | { |
| 4982 | dVAR; dSP; dMARK; dORIGMARK; dTARGET; |
| 4983 | register AV * const ary = DEREF_PLAIN_ARRAY(MUTABLE_AV(*++MARK)); |
| 4984 | const MAGIC * const mg = SvTIED_mg((const SV *)ary, PERL_MAGIC_tied); |
| 4985 | |
| 4986 | if (mg) { |
| 4987 | *MARK-- = SvTIED_obj(MUTABLE_SV(ary), mg); |
| 4988 | PUSHMARK(MARK); |
| 4989 | PUTBACK; |
| 4990 | ENTER_with_name("call_PUSH"); |
| 4991 | call_method("PUSH",G_SCALAR|G_DISCARD); |
| 4992 | LEAVE_with_name("call_PUSH"); |
| 4993 | SPAGAIN; |
| 4994 | } |
| 4995 | else { |
| 4996 | PL_delaymagic = DM_DELAY; |
| 4997 | for (++MARK; MARK <= SP; MARK++) { |
| 4998 | SV * const sv = newSV(0); |
| 4999 | if (*MARK) |
| 5000 | sv_setsv(sv, *MARK); |
| 5001 | av_store(ary, AvFILLp(ary)+1, sv); |
| 5002 | } |
| 5003 | if (PL_delaymagic & DM_ARRAY_ISA) |
| 5004 | mg_set(MUTABLE_SV(ary)); |
| 5005 | |
| 5006 | PL_delaymagic = 0; |
| 5007 | } |
| 5008 | SP = ORIGMARK; |
| 5009 | if (OP_GIMME(PL_op, 0) != G_VOID) { |
| 5010 | PUSHi( AvFILL(ary) + 1 ); |
| 5011 | } |
| 5012 | RETURN; |
| 5013 | } |
| 5014 | |
| 5015 | PP(pp_shift) |
| 5016 | { |
| 5017 | dVAR; |
| 5018 | dSP; |
| 5019 | AV * const av = PL_op->op_flags & OPf_SPECIAL |
| 5020 | ? MUTABLE_AV(GvAV(PL_defgv)) : DEREF_PLAIN_ARRAY(MUTABLE_AV(POPs)); |
| 5021 | SV * const sv = PL_op->op_type == OP_SHIFT ? av_shift(av) : av_pop(av); |
| 5022 | EXTEND(SP, 1); |
| 5023 | assert (sv); |
| 5024 | if (AvREAL(av)) |
| 5025 | (void)sv_2mortal(sv); |
| 5026 | PUSHs(sv); |
| 5027 | RETURN; |
| 5028 | } |
| 5029 | |
| 5030 | PP(pp_unshift) |
| 5031 | { |
| 5032 | dVAR; dSP; dMARK; dORIGMARK; dTARGET; |
| 5033 | register AV *ary = DEREF_PLAIN_ARRAY(MUTABLE_AV(*++MARK)); |
| 5034 | const MAGIC * const mg = SvTIED_mg((const SV *)ary, PERL_MAGIC_tied); |
| 5035 | |
| 5036 | if (mg) { |
| 5037 | *MARK-- = SvTIED_obj(MUTABLE_SV(ary), mg); |
| 5038 | PUSHMARK(MARK); |
| 5039 | PUTBACK; |
| 5040 | ENTER_with_name("call_UNSHIFT"); |
| 5041 | call_method("UNSHIFT",G_SCALAR|G_DISCARD); |
| 5042 | LEAVE_with_name("call_UNSHIFT"); |
| 5043 | SPAGAIN; |
| 5044 | } |
| 5045 | else { |
| 5046 | register I32 i = 0; |
| 5047 | av_unshift(ary, SP - MARK); |
| 5048 | while (MARK < SP) { |
| 5049 | SV * const sv = newSVsv(*++MARK); |
| 5050 | (void)av_store(ary, i++, sv); |
| 5051 | } |
| 5052 | } |
| 5053 | SP = ORIGMARK; |
| 5054 | if (OP_GIMME(PL_op, 0) != G_VOID) { |
| 5055 | PUSHi( AvFILL(ary) + 1 ); |
| 5056 | } |
| 5057 | RETURN; |
| 5058 | } |
| 5059 | |
| 5060 | PP(pp_reverse) |
| 5061 | { |
| 5062 | dVAR; dSP; dMARK; |
| 5063 | |
| 5064 | if (GIMME == G_ARRAY) { |
| 5065 | if (PL_op->op_private & OPpREVERSE_INPLACE) { |
| 5066 | AV *av; |
| 5067 | |
| 5068 | /* See pp_sort() */ |
| 5069 | assert( MARK+1 == SP && *SP && SvTYPE(*SP) == SVt_PVAV); |
| 5070 | (void)POPMARK; /* remove mark associated with ex-OP_AASSIGN */ |
| 5071 | av = MUTABLE_AV((*SP)); |
| 5072 | /* In-place reversing only happens in void context for the array |
| 5073 | * assignment. We don't need to push anything on the stack. */ |
| 5074 | SP = MARK; |
| 5075 | |
| 5076 | if (SvMAGICAL(av)) { |
| 5077 | I32 i, j; |
| 5078 | register SV *tmp = sv_newmortal(); |
| 5079 | /* For SvCANEXISTDELETE */ |
| 5080 | HV *stash; |
| 5081 | const MAGIC *mg; |
| 5082 | bool can_preserve = SvCANEXISTDELETE(av); |
| 5083 | |
| 5084 | for (i = 0, j = av_len(av); i < j; ++i, --j) { |
| 5085 | register SV *begin, *end; |
| 5086 | |
| 5087 | if (can_preserve) { |
| 5088 | if (!av_exists(av, i)) { |
| 5089 | if (av_exists(av, j)) { |
| 5090 | register SV *sv = av_delete(av, j, 0); |
| 5091 | begin = *av_fetch(av, i, TRUE); |
| 5092 | sv_setsv_mg(begin, sv); |
| 5093 | } |
| 5094 | continue; |
| 5095 | } |
| 5096 | else if (!av_exists(av, j)) { |
| 5097 | register SV *sv = av_delete(av, i, 0); |
| 5098 | end = *av_fetch(av, j, TRUE); |
| 5099 | sv_setsv_mg(end, sv); |
| 5100 | continue; |
| 5101 | } |
| 5102 | } |
| 5103 | |
| 5104 | begin = *av_fetch(av, i, TRUE); |
| 5105 | end = *av_fetch(av, j, TRUE); |
| 5106 | sv_setsv(tmp, begin); |
| 5107 | sv_setsv_mg(begin, end); |
| 5108 | sv_setsv_mg(end, tmp); |
| 5109 | } |
| 5110 | } |
| 5111 | else { |
| 5112 | SV **begin = AvARRAY(av); |
| 5113 | |
| 5114 | if (begin) { |
| 5115 | SV **end = begin + AvFILLp(av); |
| 5116 | |
| 5117 | while (begin < end) { |
| 5118 | register SV * const tmp = *begin; |
| 5119 | *begin++ = *end; |
| 5120 | *end-- = tmp; |
| 5121 | } |
| 5122 | } |
| 5123 | } |
| 5124 | } |
| 5125 | else { |
| 5126 | SV **oldsp = SP; |
| 5127 | MARK++; |
| 5128 | while (MARK < SP) { |
| 5129 | register SV * const tmp = *MARK; |
| 5130 | *MARK++ = *SP; |
| 5131 | *SP-- = tmp; |
| 5132 | } |
| 5133 | /* safe as long as stack cannot get extended in the above */ |
| 5134 | SP = oldsp; |
| 5135 | } |
| 5136 | } |
| 5137 | else { |
| 5138 | register char *up; |
| 5139 | register char *down; |
| 5140 | register I32 tmp; |
| 5141 | dTARGET; |
| 5142 | STRLEN len; |
| 5143 | |
| 5144 | SvUTF8_off(TARG); /* decontaminate */ |
| 5145 | if (SP - MARK > 1) |
| 5146 | do_join(TARG, &PL_sv_no, MARK, SP); |
| 5147 | else { |
| 5148 | sv_setsv(TARG, SP > MARK ? *SP : find_rundefsv()); |
| 5149 | if (! SvOK(TARG) && ckWARN(WARN_UNINITIALIZED)) |
| 5150 | report_uninit(TARG); |
| 5151 | } |
| 5152 | |
| 5153 | up = SvPV_force(TARG, len); |
| 5154 | if (len > 1) { |
| 5155 | if (DO_UTF8(TARG)) { /* first reverse each character */ |
| 5156 | U8* s = (U8*)SvPVX(TARG); |
| 5157 | const U8* send = (U8*)(s + len); |
| 5158 | while (s < send) { |
| 5159 | if (UTF8_IS_INVARIANT(*s)) { |
| 5160 | s++; |
| 5161 | continue; |
| 5162 | } |
| 5163 | else { |
| 5164 | if (!utf8_to_uvchr(s, 0)) |
| 5165 | break; |
| 5166 | up = (char*)s; |
| 5167 | s += UTF8SKIP(s); |
| 5168 | down = (char*)(s - 1); |
| 5169 | /* reverse this character */ |
| 5170 | while (down > up) { |
| 5171 | tmp = *up; |
| 5172 | *up++ = *down; |
| 5173 | *down-- = (char)tmp; |
| 5174 | } |
| 5175 | } |
| 5176 | } |
| 5177 | up = SvPVX(TARG); |
| 5178 | } |
| 5179 | down = SvPVX(TARG) + len - 1; |
| 5180 | while (down > up) { |
| 5181 | tmp = *up; |
| 5182 | *up++ = *down; |
| 5183 | *down-- = (char)tmp; |
| 5184 | } |
| 5185 | (void)SvPOK_only_UTF8(TARG); |
| 5186 | } |
| 5187 | SP = MARK + 1; |
| 5188 | SETTARG; |
| 5189 | } |
| 5190 | RETURN; |
| 5191 | } |
| 5192 | |
| 5193 | PP(pp_split) |
| 5194 | { |
| 5195 | dVAR; dSP; dTARG; |
| 5196 | AV *ary; |
| 5197 | register IV limit = POPi; /* note, negative is forever */ |
| 5198 | SV * const sv = POPs; |
| 5199 | STRLEN len; |
| 5200 | register const char *s = SvPV_const(sv, len); |
| 5201 | const bool do_utf8 = DO_UTF8(sv); |
| 5202 | const char *strend = s + len; |
| 5203 | register PMOP *pm; |
| 5204 | register REGEXP *rx; |
| 5205 | register SV *dstr; |
| 5206 | register const char *m; |
| 5207 | I32 iters = 0; |
| 5208 | const STRLEN slen = do_utf8 ? utf8_length((U8*)s, (U8*)strend) : (STRLEN)(strend - s); |
| 5209 | I32 maxiters = slen + 10; |
| 5210 | I32 trailing_empty = 0; |
| 5211 | const char *orig; |
| 5212 | const I32 origlimit = limit; |
| 5213 | I32 realarray = 0; |
| 5214 | I32 base; |
| 5215 | const I32 gimme = GIMME_V; |
| 5216 | bool gimme_scalar; |
| 5217 | const I32 oldsave = PL_savestack_ix; |
| 5218 | U32 make_mortal = SVs_TEMP; |
| 5219 | bool multiline = 0; |
| 5220 | MAGIC *mg = NULL; |
| 5221 | |
| 5222 | #ifdef DEBUGGING |
| 5223 | Copy(&LvTARGOFF(POPs), &pm, 1, PMOP*); |
| 5224 | #else |
| 5225 | pm = (PMOP*)POPs; |
| 5226 | #endif |
| 5227 | if (!pm || !s) |
| 5228 | DIE(aTHX_ "panic: pp_split"); |
| 5229 | rx = PM_GETRE(pm); |
| 5230 | |
| 5231 | TAINT_IF(get_regex_charset(RX_EXTFLAGS(rx)) == REGEX_LOCALE_CHARSET && |
| 5232 | (RX_EXTFLAGS(rx) & (RXf_WHITE | RXf_SKIPWHITE))); |
| 5233 | |
| 5234 | RX_MATCH_UTF8_set(rx, do_utf8); |
| 5235 | |
| 5236 | #ifdef USE_ITHREADS |
| 5237 | if (pm->op_pmreplrootu.op_pmtargetoff) { |
| 5238 | ary = GvAVn(MUTABLE_GV(PAD_SVl(pm->op_pmreplrootu.op_pmtargetoff))); |
| 5239 | } |
| 5240 | #else |
| 5241 | if (pm->op_pmreplrootu.op_pmtargetgv) { |
| 5242 | ary = GvAVn(pm->op_pmreplrootu.op_pmtargetgv); |
| 5243 | } |
| 5244 | #endif |
| 5245 | else |
| 5246 | ary = NULL; |
| 5247 | if (ary && (gimme != G_ARRAY || (pm->op_pmflags & PMf_ONCE))) { |
| 5248 | realarray = 1; |
| 5249 | PUTBACK; |
| 5250 | av_extend(ary,0); |
| 5251 | av_clear(ary); |
| 5252 | SPAGAIN; |
| 5253 | if ((mg = SvTIED_mg((const SV *)ary, PERL_MAGIC_tied))) { |
| 5254 | PUSHMARK(SP); |
| 5255 | XPUSHs(SvTIED_obj(MUTABLE_SV(ary), mg)); |
| 5256 | } |
| 5257 | else { |
| 5258 | if (!AvREAL(ary)) { |
| 5259 | I32 i; |
| 5260 | AvREAL_on(ary); |
| 5261 | AvREIFY_off(ary); |
| 5262 | for (i = AvFILLp(ary); i >= 0; i--) |
| 5263 | AvARRAY(ary)[i] = &PL_sv_undef; /* don't free mere refs */ |
| 5264 | } |
| 5265 | /* temporarily switch stacks */ |
| 5266 | SAVESWITCHSTACK(PL_curstack, ary); |
| 5267 | make_mortal = 0; |
| 5268 | } |
| 5269 | } |
| 5270 | base = SP - PL_stack_base; |
| 5271 | orig = s; |
| 5272 | if (RX_EXTFLAGS(rx) & RXf_SKIPWHITE) { |
| 5273 | if (do_utf8) { |
| 5274 | while (*s == ' ' || is_utf8_space((U8*)s)) |
| 5275 | s += UTF8SKIP(s); |
| 5276 | } |
| 5277 | else if (get_regex_charset(RX_EXTFLAGS(rx)) == REGEX_LOCALE_CHARSET) { |
| 5278 | while (isSPACE_LC(*s)) |
| 5279 | s++; |
| 5280 | } |
| 5281 | else { |
| 5282 | while (isSPACE(*s)) |
| 5283 | s++; |
| 5284 | } |
| 5285 | } |
| 5286 | if (RX_EXTFLAGS(rx) & RXf_PMf_MULTILINE) { |
| 5287 | multiline = 1; |
| 5288 | } |
| 5289 | |
| 5290 | gimme_scalar = gimme == G_SCALAR && !ary; |
| 5291 | |
| 5292 | if (!limit) |
| 5293 | limit = maxiters + 2; |
| 5294 | if (RX_EXTFLAGS(rx) & RXf_WHITE) { |
| 5295 | while (--limit) { |
| 5296 | m = s; |
| 5297 | /* this one uses 'm' and is a negative test */ |
| 5298 | if (do_utf8) { |
| 5299 | while (m < strend && !( *m == ' ' || is_utf8_space((U8*)m) )) { |
| 5300 | const int t = UTF8SKIP(m); |
| 5301 | /* is_utf8_space returns FALSE for malform utf8 */ |
| 5302 | if (strend - m < t) |
| 5303 | m = strend; |
| 5304 | else |
| 5305 | m += t; |
| 5306 | } |
| 5307 | } |
| 5308 | else if (get_regex_charset(RX_EXTFLAGS(rx)) == REGEX_LOCALE_CHARSET) { |
| 5309 | while (m < strend && !isSPACE_LC(*m)) |
| 5310 | ++m; |
| 5311 | } else { |
| 5312 | while (m < strend && !isSPACE(*m)) |
| 5313 | ++m; |
| 5314 | } |
| 5315 | if (m >= strend) |
| 5316 | break; |
| 5317 | |
| 5318 | if (gimme_scalar) { |
| 5319 | iters++; |
| 5320 | if (m-s == 0) |
| 5321 | trailing_empty++; |
| 5322 | else |
| 5323 | trailing_empty = 0; |
| 5324 | } else { |
| 5325 | dstr = newSVpvn_flags(s, m-s, |
| 5326 | (do_utf8 ? SVf_UTF8 : 0) | make_mortal); |
| 5327 | XPUSHs(dstr); |
| 5328 | } |
| 5329 | |
| 5330 | /* skip the whitespace found last */ |
| 5331 | if (do_utf8) |
| 5332 | s = m + UTF8SKIP(m); |
| 5333 | else |
| 5334 | s = m + 1; |
| 5335 | |
| 5336 | /* this one uses 's' and is a positive test */ |
| 5337 | if (do_utf8) { |
| 5338 | while (s < strend && ( *s == ' ' || is_utf8_space((U8*)s) )) |
| 5339 | s += UTF8SKIP(s); |
| 5340 | } |
| 5341 | else if (get_regex_charset(RX_EXTFLAGS(rx)) == REGEX_LOCALE_CHARSET) { |
| 5342 | while (s < strend && isSPACE_LC(*s)) |
| 5343 | ++s; |
| 5344 | } else { |
| 5345 | while (s < strend && isSPACE(*s)) |
| 5346 | ++s; |
| 5347 | } |
| 5348 | } |
| 5349 | } |
| 5350 | else if (RX_EXTFLAGS(rx) & RXf_START_ONLY) { |
| 5351 | while (--limit) { |
| 5352 | for (m = s; m < strend && *m != '\n'; m++) |
| 5353 | ; |
| 5354 | m++; |
| 5355 | if (m >= strend) |
| 5356 | break; |
| 5357 | |
| 5358 | if (gimme_scalar) { |
| 5359 | iters++; |
| 5360 | if (m-s == 0) |
| 5361 | trailing_empty++; |
| 5362 | else |
| 5363 | trailing_empty = 0; |
| 5364 | } else { |
| 5365 | dstr = newSVpvn_flags(s, m-s, |
| 5366 | (do_utf8 ? SVf_UTF8 : 0) | make_mortal); |
| 5367 | XPUSHs(dstr); |
| 5368 | } |
| 5369 | s = m; |
| 5370 | } |
| 5371 | } |
| 5372 | else if (RX_EXTFLAGS(rx) & RXf_NULL && !(s >= strend)) { |
| 5373 | /* |
| 5374 | Pre-extend the stack, either the number of bytes or |
| 5375 | characters in the string or a limited amount, triggered by: |
| 5376 | |
| 5377 | my ($x, $y) = split //, $str; |
| 5378 | or |
| 5379 | split //, $str, $i; |
| 5380 | */ |
| 5381 | if (!gimme_scalar) { |
| 5382 | const U32 items = limit - 1; |
| 5383 | if (items < slen) |
| 5384 | EXTEND(SP, items); |
| 5385 | else |
| 5386 | EXTEND(SP, slen); |
| 5387 | } |
| 5388 | |
| 5389 | if (do_utf8) { |
| 5390 | while (--limit) { |
| 5391 | /* keep track of how many bytes we skip over */ |
| 5392 | m = s; |
| 5393 | s += UTF8SKIP(s); |
| 5394 | if (gimme_scalar) { |
| 5395 | iters++; |
| 5396 | if (s-m == 0) |
| 5397 | trailing_empty++; |
| 5398 | else |
| 5399 | trailing_empty = 0; |
| 5400 | } else { |
| 5401 | dstr = newSVpvn_flags(m, s-m, SVf_UTF8 | make_mortal); |
| 5402 | |
| 5403 | PUSHs(dstr); |
| 5404 | } |
| 5405 | |
| 5406 | if (s >= strend) |
| 5407 | break; |
| 5408 | } |
| 5409 | } else { |
| 5410 | while (--limit) { |
| 5411 | if (gimme_scalar) { |
| 5412 | iters++; |
| 5413 | } else { |
| 5414 | dstr = newSVpvn(s, 1); |
| 5415 | |
| 5416 | |
| 5417 | if (make_mortal) |
| 5418 | sv_2mortal(dstr); |
| 5419 | |
| 5420 | PUSHs(dstr); |
| 5421 | } |
| 5422 | |
| 5423 | s++; |
| 5424 | |
| 5425 | if (s >= strend) |
| 5426 | break; |
| 5427 | } |
| 5428 | } |
| 5429 | } |
| 5430 | else if (do_utf8 == (RX_UTF8(rx) != 0) && |
| 5431 | (RX_EXTFLAGS(rx) & RXf_USE_INTUIT) && !RX_NPARENS(rx) |
| 5432 | && (RX_EXTFLAGS(rx) & RXf_CHECK_ALL) |
| 5433 | && !(RX_EXTFLAGS(rx) & RXf_ANCH)) { |
| 5434 | const int tail = (RX_EXTFLAGS(rx) & RXf_INTUIT_TAIL); |
| 5435 | SV * const csv = CALLREG_INTUIT_STRING(rx); |
| 5436 | |
| 5437 | len = RX_MINLENRET(rx); |
| 5438 | if (len == 1 && !RX_UTF8(rx) && !tail) { |
| 5439 | const char c = *SvPV_nolen_const(csv); |
| 5440 | while (--limit) { |
| 5441 | for (m = s; m < strend && *m != c; m++) |
| 5442 | ; |
| 5443 | if (m >= strend) |
| 5444 | break; |
| 5445 | if (gimme_scalar) { |
| 5446 | iters++; |
| 5447 | if (m-s == 0) |
| 5448 | trailing_empty++; |
| 5449 | else |
| 5450 | trailing_empty = 0; |
| 5451 | } else { |
| 5452 | dstr = newSVpvn_flags(s, m-s, |
| 5453 | (do_utf8 ? SVf_UTF8 : 0) | make_mortal); |
| 5454 | XPUSHs(dstr); |
| 5455 | } |
| 5456 | /* The rx->minlen is in characters but we want to step |
| 5457 | * s ahead by bytes. */ |
| 5458 | if (do_utf8) |
| 5459 | s = (char*)utf8_hop((U8*)m, len); |
| 5460 | else |
| 5461 | s = m + len; /* Fake \n at the end */ |
| 5462 | } |
| 5463 | } |
| 5464 | else { |
| 5465 | while (s < strend && --limit && |
| 5466 | (m = fbm_instr((unsigned char*)s, (unsigned char*)strend, |
| 5467 | csv, multiline ? FBMrf_MULTILINE : 0)) ) |
| 5468 | { |
| 5469 | if (gimme_scalar) { |
| 5470 | iters++; |
| 5471 | if (m-s == 0) |
| 5472 | trailing_empty++; |
| 5473 | else |
| 5474 | trailing_empty = 0; |
| 5475 | } else { |
| 5476 | dstr = newSVpvn_flags(s, m-s, |
| 5477 | (do_utf8 ? SVf_UTF8 : 0) | make_mortal); |
| 5478 | XPUSHs(dstr); |
| 5479 | } |
| 5480 | /* The rx->minlen is in characters but we want to step |
| 5481 | * s ahead by bytes. */ |
| 5482 | if (do_utf8) |
| 5483 | s = (char*)utf8_hop((U8*)m, len); |
| 5484 | else |
| 5485 | s = m + len; /* Fake \n at the end */ |
| 5486 | } |
| 5487 | } |
| 5488 | } |
| 5489 | else { |
| 5490 | maxiters += slen * RX_NPARENS(rx); |
| 5491 | while (s < strend && --limit) |
| 5492 | { |
| 5493 | I32 rex_return; |
| 5494 | PUTBACK; |
| 5495 | rex_return = CALLREGEXEC(rx, (char*)s, (char*)strend, (char*)orig, 1 , |
| 5496 | sv, NULL, SvSCREAM(sv) ? REXEC_SCREAM : 0); |
| 5497 | SPAGAIN; |
| 5498 | if (rex_return == 0) |
| 5499 | break; |
| 5500 | TAINT_IF(RX_MATCH_TAINTED(rx)); |
| 5501 | if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) { |
| 5502 | m = s; |
| 5503 | s = orig; |
| 5504 | orig = RX_SUBBEG(rx); |
| 5505 | s = orig + (m - s); |
| 5506 | strend = s + (strend - m); |
| 5507 | } |
| 5508 | m = RX_OFFS(rx)[0].start + orig; |
| 5509 | |
| 5510 | if (gimme_scalar) { |
| 5511 | iters++; |
| 5512 | if (m-s == 0) |
| 5513 | trailing_empty++; |
| 5514 | else |
| 5515 | trailing_empty = 0; |
| 5516 | } else { |
| 5517 | dstr = newSVpvn_flags(s, m-s, |
| 5518 | (do_utf8 ? SVf_UTF8 : 0) | make_mortal); |
| 5519 | XPUSHs(dstr); |
| 5520 | } |
| 5521 | if (RX_NPARENS(rx)) { |
| 5522 | I32 i; |
| 5523 | for (i = 1; i <= (I32)RX_NPARENS(rx); i++) { |
| 5524 | s = RX_OFFS(rx)[i].start + orig; |
| 5525 | m = RX_OFFS(rx)[i].end + orig; |
| 5526 | |
| 5527 | /* japhy (07/27/01) -- the (m && s) test doesn't catch |
| 5528 | parens that didn't match -- they should be set to |
| 5529 | undef, not the empty string */ |
| 5530 | if (gimme_scalar) { |
| 5531 | iters++; |
| 5532 | if (m-s == 0) |
| 5533 | trailing_empty++; |
| 5534 | else |
| 5535 | trailing_empty = 0; |
| 5536 | } else { |
| 5537 | if (m >= orig && s >= orig) { |
| 5538 | dstr = newSVpvn_flags(s, m-s, |
| 5539 | (do_utf8 ? SVf_UTF8 : 0) |
| 5540 | | make_mortal); |
| 5541 | } |
| 5542 | else |
| 5543 | dstr = &PL_sv_undef; /* undef, not "" */ |
| 5544 | XPUSHs(dstr); |
| 5545 | } |
| 5546 | |
| 5547 | } |
| 5548 | } |
| 5549 | s = RX_OFFS(rx)[0].end + orig; |
| 5550 | } |
| 5551 | } |
| 5552 | |
| 5553 | if (!gimme_scalar) { |
| 5554 | iters = (SP - PL_stack_base) - base; |
| 5555 | } |
| 5556 | if (iters > maxiters) |
| 5557 | DIE(aTHX_ "Split loop"); |
| 5558 | |
| 5559 | /* keep field after final delim? */ |
| 5560 | if (s < strend || (iters && origlimit)) { |
| 5561 | if (!gimme_scalar) { |
| 5562 | const STRLEN l = strend - s; |
| 5563 | dstr = newSVpvn_flags(s, l, (do_utf8 ? SVf_UTF8 : 0) | make_mortal); |
| 5564 | XPUSHs(dstr); |
| 5565 | } |
| 5566 | iters++; |
| 5567 | } |
| 5568 | else if (!origlimit) { |
| 5569 | if (gimme_scalar) { |
| 5570 | iters -= trailing_empty; |
| 5571 | } else { |
| 5572 | while (iters > 0 && (!TOPs || !SvANY(TOPs) || SvCUR(TOPs) == 0)) { |
| 5573 | if (TOPs && !make_mortal) |
| 5574 | sv_2mortal(TOPs); |
| 5575 | *SP-- = &PL_sv_undef; |
| 5576 | iters--; |
| 5577 | } |
| 5578 | } |
| 5579 | } |
| 5580 | |
| 5581 | PUTBACK; |
| 5582 | LEAVE_SCOPE(oldsave); /* may undo an earlier SWITCHSTACK */ |
| 5583 | SPAGAIN; |
| 5584 | if (realarray) { |
| 5585 | if (!mg) { |
| 5586 | if (SvSMAGICAL(ary)) { |
| 5587 | PUTBACK; |
| 5588 | mg_set(MUTABLE_SV(ary)); |
| 5589 | SPAGAIN; |
| 5590 | } |
| 5591 | if (gimme == G_ARRAY) { |
| 5592 | EXTEND(SP, iters); |
| 5593 | Copy(AvARRAY(ary), SP + 1, iters, SV*); |
| 5594 | SP += iters; |
| 5595 | RETURN; |
| 5596 | } |
| 5597 | } |
| 5598 | else { |
| 5599 | PUTBACK; |
| 5600 | ENTER_with_name("call_PUSH"); |
| 5601 | call_method("PUSH",G_SCALAR|G_DISCARD); |
| 5602 | LEAVE_with_name("call_PUSH"); |
| 5603 | SPAGAIN; |
| 5604 | if (gimme == G_ARRAY) { |
| 5605 | I32 i; |
| 5606 | /* EXTEND should not be needed - we just popped them */ |
| 5607 | EXTEND(SP, iters); |
| 5608 | for (i=0; i < iters; i++) { |
| 5609 | SV **svp = av_fetch(ary, i, FALSE); |
| 5610 | PUSHs((svp) ? *svp : &PL_sv_undef); |
| 5611 | } |
| 5612 | RETURN; |
| 5613 | } |
| 5614 | } |
| 5615 | } |
| 5616 | else { |
| 5617 | if (gimme == G_ARRAY) |
| 5618 | RETURN; |
| 5619 | } |
| 5620 | |
| 5621 | GETTARGET; |
| 5622 | PUSHi(iters); |
| 5623 | RETURN; |
| 5624 | } |
| 5625 | |
| 5626 | PP(pp_once) |
| 5627 | { |
| 5628 | dSP; |
| 5629 | SV *const sv = PAD_SVl(PL_op->op_targ); |
| 5630 | |
| 5631 | if (SvPADSTALE(sv)) { |
| 5632 | /* First time. */ |
| 5633 | SvPADSTALE_off(sv); |
| 5634 | RETURNOP(cLOGOP->op_other); |
| 5635 | } |
| 5636 | RETURNOP(cLOGOP->op_next); |
| 5637 | } |
| 5638 | |
| 5639 | PP(pp_lock) |
| 5640 | { |
| 5641 | dVAR; |
| 5642 | dSP; |
| 5643 | dTOPss; |
| 5644 | SV *retsv = sv; |
| 5645 | SvLOCK(sv); |
| 5646 | if (SvTYPE(retsv) == SVt_PVAV || SvTYPE(retsv) == SVt_PVHV |
| 5647 | || SvTYPE(retsv) == SVt_PVCV) { |
| 5648 | retsv = refto(retsv); |
| 5649 | } |
| 5650 | SETs(retsv); |
| 5651 | RETURN; |
| 5652 | } |
| 5653 | |
| 5654 | |
| 5655 | PP(unimplemented_op) |
| 5656 | { |
| 5657 | dVAR; |
| 5658 | const Optype op_type = PL_op->op_type; |
| 5659 | /* Using OP_NAME() isn't going to be helpful here. Firstly, it doesn't cope |
| 5660 | with out of range op numbers - it only "special" cases op_custom. |
| 5661 | Secondly, as the three ops we "panic" on are padmy, mapstart and custom, |
| 5662 | if we get here for a custom op then that means that the custom op didn't |
| 5663 | have an implementation. Given that OP_NAME() looks up the custom op |
| 5664 | by its pp_addr, likely it will return NULL, unless someone (unhelpfully) |
| 5665 | registers &PL_unimplemented_op as the address of their custom op. |
| 5666 | NULL doesn't generate a useful error message. "custom" does. */ |
| 5667 | const char *const name = op_type >= OP_max |
| 5668 | ? "[out of range]" : PL_op_name[PL_op->op_type]; |
| 5669 | if(OP_IS_SOCKET(op_type)) |
| 5670 | DIE(aTHX_ PL_no_sock_func, name); |
| 5671 | DIE(aTHX_ "panic: unimplemented op %s (#%d) called", name, op_type); |
| 5672 | } |
| 5673 | |
| 5674 | PP(pp_boolkeys) |
| 5675 | { |
| 5676 | dVAR; |
| 5677 | dSP; |
| 5678 | HV * const hv = (HV*)POPs; |
| 5679 | |
| 5680 | if (SvTYPE(hv) != SVt_PVHV) { XPUSHs(&PL_sv_no); RETURN; } |
| 5681 | |
| 5682 | if (SvRMAGICAL(hv)) { |
| 5683 | MAGIC * const mg = mg_find((SV*)hv, PERL_MAGIC_tied); |
| 5684 | if (mg) { |
| 5685 | XPUSHs(magic_scalarpack(hv, mg)); |
| 5686 | RETURN; |
| 5687 | } |
| 5688 | } |
| 5689 | |
| 5690 | XPUSHs(boolSV(HvUSEDKEYS(hv) != 0)); |
| 5691 | RETURN; |
| 5692 | } |
| 5693 | |
| 5694 | /* For sorting out arguments passed to a &CORE:: subroutine */ |
| 5695 | PP(pp_coreargs) |
| 5696 | { |
| 5697 | dSP; |
| 5698 | int opnum = SvIOK(cSVOP_sv) ? (int)SvUV(cSVOP_sv) : 0; |
| 5699 | int defgv = PL_opargs[opnum] & OA_DEFGV, whicharg = 0; |
| 5700 | AV * const at_ = GvAV(PL_defgv); |
| 5701 | SV **svp = AvARRAY(at_); |
| 5702 | I32 minargs = 0, maxargs = 0, numargs = AvFILLp(at_)+1; |
| 5703 | I32 oa = opnum ? PL_opargs[opnum] >> OASHIFT : 0; |
| 5704 | bool seen_question = 0; |
| 5705 | const char *err = NULL; |
| 5706 | const bool pushmark = PL_op->op_private & OPpCOREARGS_PUSHMARK; |
| 5707 | |
| 5708 | /* Count how many args there are first, to get some idea how far to |
| 5709 | extend the stack. */ |
| 5710 | while (oa) { |
| 5711 | if ((oa & 7) == OA_LIST) { maxargs = I32_MAX; break; } |
| 5712 | maxargs++; |
| 5713 | if (oa & OA_OPTIONAL) seen_question = 1; |
| 5714 | if (!seen_question) minargs++; |
| 5715 | oa >>= 4; |
| 5716 | } |
| 5717 | |
| 5718 | if(numargs < minargs) err = "Not enough"; |
| 5719 | else if(numargs > maxargs) err = "Too many"; |
| 5720 | if (err) |
| 5721 | /* diag_listed_as: Too many arguments for %s */ |
| 5722 | Perl_croak(aTHX_ |
| 5723 | "%s arguments for %s", err, |
| 5724 | opnum ? OP_DESC(PL_op->op_next) : SvPV_nolen_const(cSVOP_sv) |
| 5725 | ); |
| 5726 | |
| 5727 | /* Reset the stack pointer. Without this, we end up returning our own |
| 5728 | arguments in list context, in addition to the values we are supposed |
| 5729 | to return. nextstate usually does this on sub entry, but we need |
| 5730 | to run the next op with the caller's hints, so we cannot have a |
| 5731 | nextstate. */ |
| 5732 | SP = PL_stack_base + cxstack[cxstack_ix].blk_oldsp; |
| 5733 | |
| 5734 | if(!maxargs) RETURN; |
| 5735 | |
| 5736 | /* We do this here, rather than with a separate pushmark op, as it has |
| 5737 | to come in between two things this function does (stack reset and |
| 5738 | arg pushing). This seems the easiest way to do it. */ |
| 5739 | if (pushmark) { |
| 5740 | PUTBACK; |
| 5741 | (void)Perl_pp_pushmark(aTHX); |
| 5742 | } |
| 5743 | |
| 5744 | EXTEND(SP, maxargs == I32_MAX ? numargs : maxargs); |
| 5745 | PUTBACK; /* The code below can die in various places. */ |
| 5746 | |
| 5747 | oa = PL_opargs[opnum] >> OASHIFT; |
| 5748 | for (; oa&&(numargs||!pushmark); (void)(numargs&&(++svp,--numargs))) { |
| 5749 | whicharg++; |
| 5750 | switch (oa & 7) { |
| 5751 | case OA_SCALAR: |
| 5752 | if (!numargs && defgv && whicharg == minargs + 1) { |
| 5753 | PERL_SI * const oldsi = PL_curstackinfo; |
| 5754 | I32 const oldcxix = oldsi->si_cxix; |
| 5755 | CV *caller; |
| 5756 | if (oldcxix) oldsi->si_cxix--; |
| 5757 | else PL_curstackinfo = oldsi->si_prev; |
| 5758 | caller = find_runcv(NULL); |
| 5759 | PL_curstackinfo = oldsi; |
| 5760 | oldsi->si_cxix = oldcxix; |
| 5761 | PUSHs(find_rundefsv2( |
| 5762 | caller,cxstack[cxstack_ix].blk_oldcop->cop_seq |
| 5763 | )); |
| 5764 | } |
| 5765 | else PUSHs(numargs ? svp && *svp ? *svp : &PL_sv_undef : NULL); |
| 5766 | break; |
| 5767 | case OA_LIST: |
| 5768 | while (numargs--) { |
| 5769 | PUSHs(svp && *svp ? *svp : &PL_sv_undef); |
| 5770 | svp++; |
| 5771 | } |
| 5772 | RETURN; |
| 5773 | case OA_HVREF: |
| 5774 | if (!svp || !*svp || !SvROK(*svp) |
| 5775 | || SvTYPE(SvRV(*svp)) != SVt_PVHV) |
| 5776 | DIE(aTHX_ |
| 5777 | /* diag_listed_as: Type of arg %d to &CORE::%s must be %s*/ |
| 5778 | "Type of arg %d to &CORE::%s must be hash reference", |
| 5779 | whicharg, OP_DESC(PL_op->op_next) |
| 5780 | ); |
| 5781 | PUSHs(SvRV(*svp)); |
| 5782 | break; |
| 5783 | case OA_FILEREF: |
| 5784 | if (!numargs) PUSHs(NULL); |
| 5785 | else if(svp && *svp && SvROK(*svp) && isGV_with_GP(SvRV(*svp))) |
| 5786 | /* no magic here, as the prototype will have added an extra |
| 5787 | refgen and we just want what was there before that */ |
| 5788 | PUSHs(SvRV(*svp)); |
| 5789 | else { |
| 5790 | const bool constr = PL_op->op_private & whicharg; |
| 5791 | PUSHs(S_rv2gv(aTHX_ |
| 5792 | svp && *svp ? *svp : &PL_sv_undef, |
| 5793 | constr, CopHINTS_get(PL_curcop) & HINT_STRICT_REFS, |
| 5794 | !constr |
| 5795 | )); |
| 5796 | } |
| 5797 | break; |
| 5798 | case OA_SCALARREF: |
| 5799 | { |
| 5800 | const bool wantscalar = |
| 5801 | PL_op->op_private & OPpCOREARGS_SCALARMOD; |
| 5802 | if (!svp || !*svp || !SvROK(*svp) |
| 5803 | /* We have to permit globrefs even for the \$ proto, as |
| 5804 | *foo is indistinguishable from ${\*foo}, and the proto- |
| 5805 | type permits the latter. */ |
| 5806 | || SvTYPE(SvRV(*svp)) > ( |
| 5807 | wantscalar ? SVt_PVLV |
| 5808 | : opnum == OP_LOCK ? SVt_PVCV |
| 5809 | : SVt_PVHV |
| 5810 | ) |
| 5811 | ) |
| 5812 | DIE(aTHX_ |
| 5813 | /* diag_listed_as: Type of arg %d to &CORE::%s must be %s*/ |
| 5814 | "Type of arg %d to &CORE::%s must be %s", |
| 5815 | whicharg, OP_DESC(PL_op->op_next), |
| 5816 | wantscalar |
| 5817 | ? "scalar reference" |
| 5818 | : opnum == OP_LOCK |
| 5819 | ? "reference to one of [$@%&*]" |
| 5820 | : "reference to one of [$@%*]" |
| 5821 | ); |
| 5822 | PUSHs(SvRV(*svp)); |
| 5823 | break; |
| 5824 | } |
| 5825 | default: |
| 5826 | DIE(aTHX_ "panic: unknown OA_*: %x", (unsigned)(oa&7)); |
| 5827 | } |
| 5828 | oa = oa >> 4; |
| 5829 | } |
| 5830 | |
| 5831 | RETURN; |
| 5832 | } |
| 5833 | |
| 5834 | PP(pp_runcv) |
| 5835 | { |
| 5836 | dSP; |
| 5837 | CV *cv; |
| 5838 | if (PL_op->op_private & OPpOFFBYONE) { |
| 5839 | PERL_SI * const oldsi = PL_curstackinfo; |
| 5840 | I32 const oldcxix = oldsi->si_cxix; |
| 5841 | if (oldcxix) oldsi->si_cxix--; |
| 5842 | else PL_curstackinfo = oldsi->si_prev; |
| 5843 | cv = find_runcv(NULL); |
| 5844 | PL_curstackinfo = oldsi; |
| 5845 | oldsi->si_cxix = oldcxix; |
| 5846 | } |
| 5847 | else cv = find_runcv(NULL); |
| 5848 | XPUSHs(CvUNIQUE(cv) ? &PL_sv_undef : sv_2mortal(newRV((SV *)cv))); |
| 5849 | RETURN; |
| 5850 | } |
| 5851 | |
| 5852 | |
| 5853 | /* |
| 5854 | * Local variables: |
| 5855 | * c-indentation-style: bsd |
| 5856 | * c-basic-offset: 4 |
| 5857 | * indent-tabs-mode: t |
| 5858 | * End: |
| 5859 | * |
| 5860 | * ex: set ts=8 sts=4 sw=4 noet: |
| 5861 | */ |