| 1 | /* pp_hot.c |
| 2 | * |
| 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 4 | * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others |
| 5 | * |
| 6 | * You may distribute under the terms of either the GNU General Public |
| 7 | * License or the Artistic License, as specified in the README file. |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | /* |
| 12 | * Then he heard Merry change the note, and up went the Horn-cry of Buckland, |
| 13 | * shaking the air. |
| 14 | * |
| 15 | * Awake! Awake! Fear, Fire, Foes! Awake! |
| 16 | * Fire, Foes! Awake! |
| 17 | */ |
| 18 | |
| 19 | /* This file contains 'hot' pp ("push/pop") functions that |
| 20 | * execute the opcodes that make up a perl program. A typical pp function |
| 21 | * expects to find its arguments on the stack, and usually pushes its |
| 22 | * results onto the stack, hence the 'pp' terminology. Each OP structure |
| 23 | * contains a pointer to the relevant pp_foo() function. |
| 24 | * |
| 25 | * By 'hot', we mean common ops whose execution speed is critical. |
| 26 | * By gathering them together into a single file, we encourage |
| 27 | * CPU cache hits on hot code. Also it could be taken as a warning not to |
| 28 | * change any code in this file unless you're sure it won't affect |
| 29 | * performance. |
| 30 | */ |
| 31 | |
| 32 | #include "EXTERN.h" |
| 33 | #define PERL_IN_PP_HOT_C |
| 34 | #include "perl.h" |
| 35 | |
| 36 | /* Hot code. */ |
| 37 | |
| 38 | PP(pp_const) |
| 39 | { |
| 40 | dSP; |
| 41 | XPUSHs(cSVOP_sv); |
| 42 | RETURN; |
| 43 | } |
| 44 | |
| 45 | PP(pp_nextstate) |
| 46 | { |
| 47 | PL_curcop = (COP*)PL_op; |
| 48 | TAINT_NOT; /* Each statement is presumed innocent */ |
| 49 | PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp; |
| 50 | FREETMPS; |
| 51 | return NORMAL; |
| 52 | } |
| 53 | |
| 54 | PP(pp_gvsv) |
| 55 | { |
| 56 | dSP; |
| 57 | EXTEND(SP,1); |
| 58 | if (PL_op->op_private & OPpLVAL_INTRO) |
| 59 | PUSHs(save_scalar(cGVOP_gv)); |
| 60 | else |
| 61 | PUSHs(GvSVn(cGVOP_gv)); |
| 62 | RETURN; |
| 63 | } |
| 64 | |
| 65 | PP(pp_null) |
| 66 | { |
| 67 | return NORMAL; |
| 68 | } |
| 69 | |
| 70 | PP(pp_setstate) |
| 71 | { |
| 72 | PL_curcop = (COP*)PL_op; |
| 73 | return NORMAL; |
| 74 | } |
| 75 | |
| 76 | PP(pp_pushmark) |
| 77 | { |
| 78 | PUSHMARK(PL_stack_sp); |
| 79 | return NORMAL; |
| 80 | } |
| 81 | |
| 82 | PP(pp_stringify) |
| 83 | { |
| 84 | dSP; dTARGET; |
| 85 | sv_copypv(TARG,TOPs); |
| 86 | SETTARG; |
| 87 | RETURN; |
| 88 | } |
| 89 | |
| 90 | PP(pp_gv) |
| 91 | { |
| 92 | dSP; |
| 93 | XPUSHs((SV*)cGVOP_gv); |
| 94 | RETURN; |
| 95 | } |
| 96 | |
| 97 | PP(pp_and) |
| 98 | { |
| 99 | dSP; |
| 100 | if (!SvTRUE(TOPs)) |
| 101 | RETURN; |
| 102 | else { |
| 103 | if (PL_op->op_type == OP_AND) |
| 104 | --SP; |
| 105 | RETURNOP(cLOGOP->op_other); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | PP(pp_sassign) |
| 110 | { |
| 111 | dSP; dPOPTOPssrl; |
| 112 | |
| 113 | if (PL_op->op_private & OPpASSIGN_BACKWARDS) { |
| 114 | SV * const temp = left; |
| 115 | left = right; right = temp; |
| 116 | } |
| 117 | if (PL_tainting && PL_tainted && !SvTAINTED(left)) |
| 118 | TAINT_NOT; |
| 119 | if (PL_op->op_private & OPpASSIGN_CV_TO_GV) { |
| 120 | SV *cv = SvRV(left); |
| 121 | const U32 cv_type = SvTYPE(cv); |
| 122 | const U32 gv_type = SvTYPE(right); |
| 123 | bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM; |
| 124 | |
| 125 | if (!got_coderef) { |
| 126 | assert(SvROK(cv)); |
| 127 | } |
| 128 | |
| 129 | /* Can do the optimisation if right (LVAUE) is not a typeglob, |
| 130 | left (RVALUE) is a reference to something, and we're in void |
| 131 | context. */ |
| 132 | if (!got_coderef && gv_type != SVt_PVGV && GIMME_V == G_VOID) { |
| 133 | /* Is the target symbol table currently empty? */ |
| 134 | GV *gv = gv_fetchsv(right, GV_NOINIT, SVt_PVGV); |
| 135 | if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) { |
| 136 | /* Good. Create a new proxy constant subroutine in the target. |
| 137 | The gv becomes a(nother) reference to the constant. */ |
| 138 | SV *const value = SvRV(cv); |
| 139 | |
| 140 | SvUPGRADE((SV *)gv, SVt_RV); |
| 141 | SvROK_on(gv); |
| 142 | SvRV_set(gv, value); |
| 143 | SvREFCNT_inc(value); |
| 144 | SETs(right); |
| 145 | RETURN; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | /* Need to fix things up. */ |
| 150 | if (gv_type != SVt_PVGV) { |
| 151 | /* Need to fix GV. */ |
| 152 | right = (SV*)gv_fetchsv(right, GV_ADD, SVt_PVGV); |
| 153 | } |
| 154 | |
| 155 | if (!got_coderef) { |
| 156 | /* We've been returned a constant rather than a full subroutine, |
| 157 | but they expect a subroutine reference to apply. */ |
| 158 | ENTER; |
| 159 | SvREFCNT_inc(SvRV(cv)); |
| 160 | /* newCONSTSUB takes a reference count on the passed in SV |
| 161 | from us. We set the name to NULL, otherwise we get into |
| 162 | all sorts of fun as the reference to our new sub is |
| 163 | donated to the GV that we're about to assign to. |
| 164 | */ |
| 165 | SvRV_set(left, (SV *)newCONSTSUB(GvSTASH(right), NULL, |
| 166 | SvRV(cv))); |
| 167 | SvREFCNT_dec(cv); |
| 168 | LEAVE; |
| 169 | } |
| 170 | |
| 171 | } |
| 172 | SvSetMagicSV(right, left); |
| 173 | SETs(right); |
| 174 | RETURN; |
| 175 | } |
| 176 | |
| 177 | PP(pp_cond_expr) |
| 178 | { |
| 179 | dSP; |
| 180 | if (SvTRUEx(POPs)) |
| 181 | RETURNOP(cLOGOP->op_other); |
| 182 | else |
| 183 | RETURNOP(cLOGOP->op_next); |
| 184 | } |
| 185 | |
| 186 | PP(pp_unstack) |
| 187 | { |
| 188 | I32 oldsave; |
| 189 | TAINT_NOT; /* Each statement is presumed innocent */ |
| 190 | PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp; |
| 191 | FREETMPS; |
| 192 | oldsave = PL_scopestack[PL_scopestack_ix - 1]; |
| 193 | LEAVE_SCOPE(oldsave); |
| 194 | return NORMAL; |
| 195 | } |
| 196 | |
| 197 | PP(pp_concat) |
| 198 | { |
| 199 | dSP; dATARGET; tryAMAGICbin(concat,opASSIGN); |
| 200 | { |
| 201 | dPOPTOPssrl; |
| 202 | bool lbyte; |
| 203 | STRLEN rlen; |
| 204 | const char *rpv; |
| 205 | bool rbyte; |
| 206 | bool rcopied = FALSE; |
| 207 | |
| 208 | if (TARG == right && right != left) { |
| 209 | /* mg_get(right) may happen here ... */ |
| 210 | rpv = SvPV_const(right, rlen); |
| 211 | rbyte = !DO_UTF8(right); |
| 212 | right = sv_2mortal(newSVpvn(rpv, rlen)); |
| 213 | rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */ |
| 214 | rcopied = TRUE; |
| 215 | } |
| 216 | |
| 217 | if (TARG != left) { |
| 218 | STRLEN llen; |
| 219 | const char* const lpv = SvPV_const(left, llen); /* mg_get(left) may happen here */ |
| 220 | lbyte = !DO_UTF8(left); |
| 221 | sv_setpvn(TARG, lpv, llen); |
| 222 | if (!lbyte) |
| 223 | SvUTF8_on(TARG); |
| 224 | else |
| 225 | SvUTF8_off(TARG); |
| 226 | } |
| 227 | else { /* TARG == left */ |
| 228 | STRLEN llen; |
| 229 | SvGETMAGIC(left); /* or mg_get(left) may happen here */ |
| 230 | if (!SvOK(TARG)) { |
| 231 | if (left == right && ckWARN(WARN_UNINITIALIZED)) |
| 232 | report_uninit(right); |
| 233 | sv_setpvn(left, "", 0); |
| 234 | } |
| 235 | (void)SvPV_nomg_const(left, llen); /* Needed to set UTF8 flag */ |
| 236 | lbyte = !DO_UTF8(left); |
| 237 | if (IN_BYTES) |
| 238 | SvUTF8_off(TARG); |
| 239 | } |
| 240 | |
| 241 | /* or mg_get(right) may happen here */ |
| 242 | if (!rcopied) { |
| 243 | rpv = SvPV_const(right, rlen); |
| 244 | rbyte = !DO_UTF8(right); |
| 245 | } |
| 246 | if (lbyte != rbyte) { |
| 247 | if (lbyte) |
| 248 | sv_utf8_upgrade_nomg(TARG); |
| 249 | else { |
| 250 | if (!rcopied) |
| 251 | right = sv_2mortal(newSVpvn(rpv, rlen)); |
| 252 | sv_utf8_upgrade_nomg(right); |
| 253 | rpv = SvPV_const(right, rlen); |
| 254 | } |
| 255 | } |
| 256 | sv_catpvn_nomg(TARG, rpv, rlen); |
| 257 | |
| 258 | SETTARG; |
| 259 | RETURN; |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | PP(pp_padsv) |
| 264 | { |
| 265 | dSP; dTARGET; |
| 266 | XPUSHs(TARG); |
| 267 | if (PL_op->op_flags & OPf_MOD) { |
| 268 | if (PL_op->op_private & OPpLVAL_INTRO) |
| 269 | SAVECLEARSV(PAD_SVl(PL_op->op_targ)); |
| 270 | if (PL_op->op_private & OPpDEREF) { |
| 271 | PUTBACK; |
| 272 | vivify_ref(PAD_SVl(PL_op->op_targ), PL_op->op_private & OPpDEREF); |
| 273 | SPAGAIN; |
| 274 | } |
| 275 | } |
| 276 | RETURN; |
| 277 | } |
| 278 | |
| 279 | PP(pp_readline) |
| 280 | { |
| 281 | tryAMAGICunTARGET(iter, 0); |
| 282 | PL_last_in_gv = (GV*)(*PL_stack_sp--); |
| 283 | if (SvTYPE(PL_last_in_gv) != SVt_PVGV) { |
| 284 | if (SvROK(PL_last_in_gv) && SvTYPE(SvRV(PL_last_in_gv)) == SVt_PVGV) |
| 285 | PL_last_in_gv = (GV*)SvRV(PL_last_in_gv); |
| 286 | else { |
| 287 | dSP; |
| 288 | XPUSHs((SV*)PL_last_in_gv); |
| 289 | PUTBACK; |
| 290 | pp_rv2gv(); |
| 291 | PL_last_in_gv = (GV*)(*PL_stack_sp--); |
| 292 | } |
| 293 | } |
| 294 | return do_readline(); |
| 295 | } |
| 296 | |
| 297 | PP(pp_eq) |
| 298 | { |
| 299 | dSP; tryAMAGICbinSET(eq,0); |
| 300 | #ifndef NV_PRESERVES_UV |
| 301 | if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) { |
| 302 | SP--; |
| 303 | SETs(boolSV(SvRV(TOPs) == SvRV(TOPp1s))); |
| 304 | RETURN; |
| 305 | } |
| 306 | #endif |
| 307 | #ifdef PERL_PRESERVE_IVUV |
| 308 | SvIV_please(TOPs); |
| 309 | if (SvIOK(TOPs)) { |
| 310 | /* Unless the left argument is integer in range we are going |
| 311 | to have to use NV maths. Hence only attempt to coerce the |
| 312 | right argument if we know the left is integer. */ |
| 313 | SvIV_please(TOPm1s); |
| 314 | if (SvIOK(TOPm1s)) { |
| 315 | const bool auvok = SvUOK(TOPm1s); |
| 316 | const bool buvok = SvUOK(TOPs); |
| 317 | |
| 318 | if (auvok == buvok) { /* ## IV == IV or UV == UV ## */ |
| 319 | /* Casting IV to UV before comparison isn't going to matter |
| 320 | on 2s complement. On 1s complement or sign&magnitude |
| 321 | (if we have any of them) it could to make negative zero |
| 322 | differ from normal zero. As I understand it. (Need to |
| 323 | check - is negative zero implementation defined behaviour |
| 324 | anyway?). NWC */ |
| 325 | const UV buv = SvUVX(POPs); |
| 326 | const UV auv = SvUVX(TOPs); |
| 327 | |
| 328 | SETs(boolSV(auv == buv)); |
| 329 | RETURN; |
| 330 | } |
| 331 | { /* ## Mixed IV,UV ## */ |
| 332 | SV *ivp, *uvp; |
| 333 | IV iv; |
| 334 | |
| 335 | /* == is commutative so doesn't matter which is left or right */ |
| 336 | if (auvok) { |
| 337 | /* top of stack (b) is the iv */ |
| 338 | ivp = *SP; |
| 339 | uvp = *--SP; |
| 340 | } else { |
| 341 | uvp = *SP; |
| 342 | ivp = *--SP; |
| 343 | } |
| 344 | iv = SvIVX(ivp); |
| 345 | if (iv < 0) { |
| 346 | /* As uv is a UV, it's >0, so it cannot be == */ |
| 347 | SETs(&PL_sv_no); |
| 348 | RETURN; |
| 349 | } |
| 350 | /* we know iv is >= 0 */ |
| 351 | SETs(boolSV((UV)iv == SvUVX(uvp))); |
| 352 | RETURN; |
| 353 | } |
| 354 | } |
| 355 | } |
| 356 | #endif |
| 357 | { |
| 358 | dPOPnv; |
| 359 | SETs(boolSV(TOPn == value)); |
| 360 | RETURN; |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | PP(pp_preinc) |
| 365 | { |
| 366 | dSP; |
| 367 | if (SvTYPE(TOPs) >= SVt_PVGV && SvTYPE(TOPs) != SVt_PVLV) |
| 368 | DIE(aTHX_ PL_no_modify); |
| 369 | if (!SvREADONLY(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) |
| 370 | && SvIVX(TOPs) != IV_MAX) |
| 371 | { |
| 372 | SvIV_set(TOPs, SvIVX(TOPs) + 1); |
| 373 | SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK); |
| 374 | } |
| 375 | else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */ |
| 376 | sv_inc(TOPs); |
| 377 | SvSETMAGIC(TOPs); |
| 378 | return NORMAL; |
| 379 | } |
| 380 | |
| 381 | PP(pp_or) |
| 382 | { |
| 383 | dSP; |
| 384 | if (SvTRUE(TOPs)) |
| 385 | RETURN; |
| 386 | else { |
| 387 | if (PL_op->op_type == OP_OR) |
| 388 | --SP; |
| 389 | RETURNOP(cLOGOP->op_other); |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | PP(pp_defined) |
| 394 | { |
| 395 | dSP; |
| 396 | register SV* sv = NULL; |
| 397 | bool defined = FALSE; |
| 398 | const int op_type = PL_op->op_type; |
| 399 | |
| 400 | if(op_type == OP_DOR || op_type == OP_DORASSIGN) { |
| 401 | sv = TOPs; |
| 402 | if (!sv || !SvANY(sv)) { |
| 403 | if (op_type == OP_DOR) |
| 404 | --SP; |
| 405 | RETURNOP(cLOGOP->op_other); |
| 406 | } |
| 407 | } else if (op_type == OP_DEFINED) { |
| 408 | sv = POPs; |
| 409 | if (!sv || !SvANY(sv)) |
| 410 | RETPUSHNO; |
| 411 | } else |
| 412 | DIE(aTHX_ "panic: Invalid op (%s) in pp_defined()", OP_NAME(PL_op)); |
| 413 | |
| 414 | switch (SvTYPE(sv)) { |
| 415 | case SVt_PVAV: |
| 416 | if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) |
| 417 | defined = TRUE; |
| 418 | break; |
| 419 | case SVt_PVHV: |
| 420 | if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) |
| 421 | defined = TRUE; |
| 422 | break; |
| 423 | case SVt_PVCV: |
| 424 | if (CvROOT(sv) || CvXSUB(sv)) |
| 425 | defined = TRUE; |
| 426 | break; |
| 427 | default: |
| 428 | SvGETMAGIC(sv); |
| 429 | if (SvOK(sv)) |
| 430 | defined = TRUE; |
| 431 | } |
| 432 | |
| 433 | if(op_type == OP_DOR || op_type == OP_DORASSIGN) { |
| 434 | if(defined) |
| 435 | RETURN; |
| 436 | if(op_type == OP_DOR) |
| 437 | --SP; |
| 438 | RETURNOP(cLOGOP->op_other); |
| 439 | } |
| 440 | /* assuming OP_DEFINED */ |
| 441 | if(defined) |
| 442 | RETPUSHYES; |
| 443 | RETPUSHNO; |
| 444 | } |
| 445 | |
| 446 | PP(pp_add) |
| 447 | { |
| 448 | dSP; dATARGET; bool useleft; tryAMAGICbin(add,opASSIGN); |
| 449 | useleft = USE_LEFT(TOPm1s); |
| 450 | #ifdef PERL_PRESERVE_IVUV |
| 451 | /* We must see if we can perform the addition with integers if possible, |
| 452 | as the integer code detects overflow while the NV code doesn't. |
| 453 | If either argument hasn't had a numeric conversion yet attempt to get |
| 454 | the IV. It's important to do this now, rather than just assuming that |
| 455 | it's not IOK as a PV of "9223372036854775806" may not take well to NV |
| 456 | addition, and an SV which is NOK, NV=6.0 ought to be coerced to |
| 457 | integer in case the second argument is IV=9223372036854775806 |
| 458 | We can (now) rely on sv_2iv to do the right thing, only setting the |
| 459 | public IOK flag if the value in the NV (or PV) slot is truly integer. |
| 460 | |
| 461 | A side effect is that this also aggressively prefers integer maths over |
| 462 | fp maths for integer values. |
| 463 | |
| 464 | How to detect overflow? |
| 465 | |
| 466 | C 99 section 6.2.6.1 says |
| 467 | |
| 468 | The range of nonnegative values of a signed integer type is a subrange |
| 469 | of the corresponding unsigned integer type, and the representation of |
| 470 | the same value in each type is the same. A computation involving |
| 471 | unsigned operands can never overflow, because a result that cannot be |
| 472 | represented by the resulting unsigned integer type is reduced modulo |
| 473 | the number that is one greater than the largest value that can be |
| 474 | represented by the resulting type. |
| 475 | |
| 476 | (the 9th paragraph) |
| 477 | |
| 478 | which I read as "unsigned ints wrap." |
| 479 | |
| 480 | signed integer overflow seems to be classed as "exception condition" |
| 481 | |
| 482 | If an exceptional condition occurs during the evaluation of an |
| 483 | expression (that is, if the result is not mathematically defined or not |
| 484 | in the range of representable values for its type), the behavior is |
| 485 | undefined. |
| 486 | |
| 487 | (6.5, the 5th paragraph) |
| 488 | |
| 489 | I had assumed that on 2s complement machines signed arithmetic would |
| 490 | wrap, hence coded pp_add and pp_subtract on the assumption that |
| 491 | everything perl builds on would be happy. After much wailing and |
| 492 | gnashing of teeth it would seem that irix64 knows its ANSI spec well, |
| 493 | knows that it doesn't need to, and doesn't. Bah. Anyway, the all- |
| 494 | unsigned code below is actually shorter than the old code. :-) |
| 495 | */ |
| 496 | |
| 497 | SvIV_please(TOPs); |
| 498 | if (SvIOK(TOPs)) { |
| 499 | /* Unless the left argument is integer in range we are going to have to |
| 500 | use NV maths. Hence only attempt to coerce the right argument if |
| 501 | we know the left is integer. */ |
| 502 | register UV auv = 0; |
| 503 | bool auvok = FALSE; |
| 504 | bool a_valid = 0; |
| 505 | |
| 506 | if (!useleft) { |
| 507 | auv = 0; |
| 508 | a_valid = auvok = 1; |
| 509 | /* left operand is undef, treat as zero. + 0 is identity, |
| 510 | Could SETi or SETu right now, but space optimise by not adding |
| 511 | lots of code to speed up what is probably a rarish case. */ |
| 512 | } else { |
| 513 | /* Left operand is defined, so is it IV? */ |
| 514 | SvIV_please(TOPm1s); |
| 515 | if (SvIOK(TOPm1s)) { |
| 516 | if ((auvok = SvUOK(TOPm1s))) |
| 517 | auv = SvUVX(TOPm1s); |
| 518 | else { |
| 519 | register const IV aiv = SvIVX(TOPm1s); |
| 520 | if (aiv >= 0) { |
| 521 | auv = aiv; |
| 522 | auvok = 1; /* Now acting as a sign flag. */ |
| 523 | } else { /* 2s complement assumption for IV_MIN */ |
| 524 | auv = (UV)-aiv; |
| 525 | } |
| 526 | } |
| 527 | a_valid = 1; |
| 528 | } |
| 529 | } |
| 530 | if (a_valid) { |
| 531 | bool result_good = 0; |
| 532 | UV result; |
| 533 | register UV buv; |
| 534 | bool buvok = SvUOK(TOPs); |
| 535 | |
| 536 | if (buvok) |
| 537 | buv = SvUVX(TOPs); |
| 538 | else { |
| 539 | register const IV biv = SvIVX(TOPs); |
| 540 | if (biv >= 0) { |
| 541 | buv = biv; |
| 542 | buvok = 1; |
| 543 | } else |
| 544 | buv = (UV)-biv; |
| 545 | } |
| 546 | /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve, |
| 547 | else "IV" now, independent of how it came in. |
| 548 | if a, b represents positive, A, B negative, a maps to -A etc |
| 549 | a + b => (a + b) |
| 550 | A + b => -(a - b) |
| 551 | a + B => (a - b) |
| 552 | A + B => -(a + b) |
| 553 | all UV maths. negate result if A negative. |
| 554 | add if signs same, subtract if signs differ. */ |
| 555 | |
| 556 | if (auvok ^ buvok) { |
| 557 | /* Signs differ. */ |
| 558 | if (auv >= buv) { |
| 559 | result = auv - buv; |
| 560 | /* Must get smaller */ |
| 561 | if (result <= auv) |
| 562 | result_good = 1; |
| 563 | } else { |
| 564 | result = buv - auv; |
| 565 | if (result <= buv) { |
| 566 | /* result really should be -(auv-buv). as its negation |
| 567 | of true value, need to swap our result flag */ |
| 568 | auvok = !auvok; |
| 569 | result_good = 1; |
| 570 | } |
| 571 | } |
| 572 | } else { |
| 573 | /* Signs same */ |
| 574 | result = auv + buv; |
| 575 | if (result >= auv) |
| 576 | result_good = 1; |
| 577 | } |
| 578 | if (result_good) { |
| 579 | SP--; |
| 580 | if (auvok) |
| 581 | SETu( result ); |
| 582 | else { |
| 583 | /* Negate result */ |
| 584 | if (result <= (UV)IV_MIN) |
| 585 | SETi( -(IV)result ); |
| 586 | else { |
| 587 | /* result valid, but out of range for IV. */ |
| 588 | SETn( -(NV)result ); |
| 589 | } |
| 590 | } |
| 591 | RETURN; |
| 592 | } /* Overflow, drop through to NVs. */ |
| 593 | } |
| 594 | } |
| 595 | #endif |
| 596 | { |
| 597 | dPOPnv; |
| 598 | if (!useleft) { |
| 599 | /* left operand is undef, treat as zero. + 0.0 is identity. */ |
| 600 | SETn(value); |
| 601 | RETURN; |
| 602 | } |
| 603 | SETn( value + TOPn ); |
| 604 | RETURN; |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | PP(pp_aelemfast) |
| 609 | { |
| 610 | dSP; |
| 611 | AV *av = PL_op->op_flags & OPf_SPECIAL ? |
| 612 | (AV*)PAD_SV(PL_op->op_targ) : GvAV(cGVOP_gv); |
| 613 | const U32 lval = PL_op->op_flags & OPf_MOD; |
| 614 | SV** const svp = av_fetch(av, PL_op->op_private, lval); |
| 615 | SV *sv = (svp ? *svp : &PL_sv_undef); |
| 616 | EXTEND(SP, 1); |
| 617 | if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
| 618 | sv = sv_mortalcopy(sv); |
| 619 | PUSHs(sv); |
| 620 | RETURN; |
| 621 | } |
| 622 | |
| 623 | PP(pp_join) |
| 624 | { |
| 625 | dSP; dMARK; dTARGET; |
| 626 | MARK++; |
| 627 | do_join(TARG, *MARK, MARK, SP); |
| 628 | SP = MARK; |
| 629 | SETs(TARG); |
| 630 | RETURN; |
| 631 | } |
| 632 | |
| 633 | PP(pp_pushre) |
| 634 | { |
| 635 | dSP; |
| 636 | #ifdef DEBUGGING |
| 637 | /* |
| 638 | * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs |
| 639 | * will be enough to hold an OP*. |
| 640 | */ |
| 641 | SV* const sv = sv_newmortal(); |
| 642 | sv_upgrade(sv, SVt_PVLV); |
| 643 | LvTYPE(sv) = '/'; |
| 644 | Copy(&PL_op, &LvTARGOFF(sv), 1, OP*); |
| 645 | XPUSHs(sv); |
| 646 | #else |
| 647 | XPUSHs((SV*)PL_op); |
| 648 | #endif |
| 649 | RETURN; |
| 650 | } |
| 651 | |
| 652 | /* Oversized hot code. */ |
| 653 | |
| 654 | PP(pp_print) |
| 655 | { |
| 656 | dVAR; dSP; dMARK; dORIGMARK; |
| 657 | IO *io; |
| 658 | register PerlIO *fp; |
| 659 | MAGIC *mg; |
| 660 | GV * const gv = (PL_op->op_flags & OPf_STACKED) ? (GV*)*++MARK : PL_defoutgv; |
| 661 | |
| 662 | if (gv && (io = GvIO(gv)) |
| 663 | && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar))) |
| 664 | { |
| 665 | had_magic: |
| 666 | if (MARK == ORIGMARK) { |
| 667 | /* If using default handle then we need to make space to |
| 668 | * pass object as 1st arg, so move other args up ... |
| 669 | */ |
| 670 | MEXTEND(SP, 1); |
| 671 | ++MARK; |
| 672 | Move(MARK, MARK + 1, (SP - MARK) + 1, SV*); |
| 673 | ++SP; |
| 674 | } |
| 675 | PUSHMARK(MARK - 1); |
| 676 | *MARK = SvTIED_obj((SV*)io, mg); |
| 677 | PUTBACK; |
| 678 | ENTER; |
| 679 | call_method("PRINT", G_SCALAR); |
| 680 | LEAVE; |
| 681 | SPAGAIN; |
| 682 | MARK = ORIGMARK + 1; |
| 683 | *MARK = *SP; |
| 684 | SP = MARK; |
| 685 | RETURN; |
| 686 | } |
| 687 | if (!(io = GvIO(gv))) { |
| 688 | if ((GvEGV(gv)) && (io = GvIO(GvEGV(gv))) |
| 689 | && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar))) |
| 690 | goto had_magic; |
| 691 | if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) |
| 692 | report_evil_fh(gv, io, PL_op->op_type); |
| 693 | SETERRNO(EBADF,RMS_IFI); |
| 694 | goto just_say_no; |
| 695 | } |
| 696 | else if (!(fp = IoOFP(io))) { |
| 697 | if (ckWARN2(WARN_CLOSED, WARN_IO)) { |
| 698 | if (IoIFP(io)) |
| 699 | report_evil_fh(gv, io, OP_phoney_INPUT_ONLY); |
| 700 | else if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) |
| 701 | report_evil_fh(gv, io, PL_op->op_type); |
| 702 | } |
| 703 | SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI); |
| 704 | goto just_say_no; |
| 705 | } |
| 706 | else { |
| 707 | MARK++; |
| 708 | if (PL_ofs_sv && SvOK(PL_ofs_sv)) { |
| 709 | while (MARK <= SP) { |
| 710 | if (!do_print(*MARK, fp)) |
| 711 | break; |
| 712 | MARK++; |
| 713 | if (MARK <= SP) { |
| 714 | if (!do_print(PL_ofs_sv, fp)) { /* $, */ |
| 715 | MARK--; |
| 716 | break; |
| 717 | } |
| 718 | } |
| 719 | } |
| 720 | } |
| 721 | else { |
| 722 | while (MARK <= SP) { |
| 723 | if (!do_print(*MARK, fp)) |
| 724 | break; |
| 725 | MARK++; |
| 726 | } |
| 727 | } |
| 728 | if (MARK <= SP) |
| 729 | goto just_say_no; |
| 730 | else { |
| 731 | if (PL_ors_sv && SvOK(PL_ors_sv)) |
| 732 | if (!do_print(PL_ors_sv, fp)) /* $\ */ |
| 733 | goto just_say_no; |
| 734 | |
| 735 | if (IoFLAGS(io) & IOf_FLUSH) |
| 736 | if (PerlIO_flush(fp) == EOF) |
| 737 | goto just_say_no; |
| 738 | } |
| 739 | } |
| 740 | SP = ORIGMARK; |
| 741 | XPUSHs(&PL_sv_yes); |
| 742 | RETURN; |
| 743 | |
| 744 | just_say_no: |
| 745 | SP = ORIGMARK; |
| 746 | XPUSHs(&PL_sv_undef); |
| 747 | RETURN; |
| 748 | } |
| 749 | |
| 750 | PP(pp_rv2av) |
| 751 | { |
| 752 | dSP; dTOPss; |
| 753 | AV *av; |
| 754 | |
| 755 | if (SvROK(sv)) { |
| 756 | wasref: |
| 757 | tryAMAGICunDEREF(to_av); |
| 758 | |
| 759 | av = (AV*)SvRV(sv); |
| 760 | if (SvTYPE(av) != SVt_PVAV) |
| 761 | DIE(aTHX_ "Not an ARRAY reference"); |
| 762 | if (PL_op->op_flags & OPf_REF) { |
| 763 | SETs((SV*)av); |
| 764 | RETURN; |
| 765 | } |
| 766 | else if (LVRET) { |
| 767 | if (GIMME == G_SCALAR) |
| 768 | Perl_croak(aTHX_ "Can't return array to lvalue scalar context"); |
| 769 | SETs((SV*)av); |
| 770 | RETURN; |
| 771 | } |
| 772 | else if (PL_op->op_flags & OPf_MOD |
| 773 | && PL_op->op_private & OPpLVAL_INTRO) |
| 774 | Perl_croak(aTHX_ PL_no_localize_ref); |
| 775 | } |
| 776 | else { |
| 777 | if (SvTYPE(sv) == SVt_PVAV) { |
| 778 | av = (AV*)sv; |
| 779 | if (PL_op->op_flags & OPf_REF) { |
| 780 | SETs((SV*)av); |
| 781 | RETURN; |
| 782 | } |
| 783 | else if (LVRET) { |
| 784 | if (GIMME == G_SCALAR) |
| 785 | Perl_croak(aTHX_ "Can't return array to lvalue" |
| 786 | " scalar context"); |
| 787 | SETs((SV*)av); |
| 788 | RETURN; |
| 789 | } |
| 790 | } |
| 791 | else { |
| 792 | GV *gv; |
| 793 | |
| 794 | if (SvTYPE(sv) != SVt_PVGV) { |
| 795 | if (SvGMAGICAL(sv)) { |
| 796 | mg_get(sv); |
| 797 | if (SvROK(sv)) |
| 798 | goto wasref; |
| 799 | } |
| 800 | if (!SvOK(sv)) { |
| 801 | if (PL_op->op_flags & OPf_REF || |
| 802 | PL_op->op_private & HINT_STRICT_REFS) |
| 803 | DIE(aTHX_ PL_no_usym, "an ARRAY"); |
| 804 | if (ckWARN(WARN_UNINITIALIZED)) |
| 805 | report_uninit(sv); |
| 806 | if (GIMME == G_ARRAY) { |
| 807 | (void)POPs; |
| 808 | RETURN; |
| 809 | } |
| 810 | RETSETUNDEF; |
| 811 | } |
| 812 | if ((PL_op->op_flags & OPf_SPECIAL) && |
| 813 | !(PL_op->op_flags & OPf_MOD)) |
| 814 | { |
| 815 | gv = (GV*)gv_fetchsv(sv, 0, SVt_PVAV); |
| 816 | if (!gv |
| 817 | && (!is_gv_magical_sv(sv,0) |
| 818 | || !(gv = (GV*)gv_fetchsv(sv, GV_ADD, SVt_PVAV)))) |
| 819 | { |
| 820 | RETSETUNDEF; |
| 821 | } |
| 822 | } |
| 823 | else { |
| 824 | if (PL_op->op_private & HINT_STRICT_REFS) |
| 825 | DIE(aTHX_ PL_no_symref_sv, sv, "an ARRAY"); |
| 826 | gv = (GV*)gv_fetchsv(sv, GV_ADD, SVt_PVAV); |
| 827 | } |
| 828 | } |
| 829 | else { |
| 830 | gv = (GV*)sv; |
| 831 | } |
| 832 | av = GvAVn(gv); |
| 833 | if (PL_op->op_private & OPpLVAL_INTRO) |
| 834 | av = save_ary(gv); |
| 835 | if (PL_op->op_flags & OPf_REF) { |
| 836 | SETs((SV*)av); |
| 837 | RETURN; |
| 838 | } |
| 839 | else if (LVRET) { |
| 840 | if (GIMME == G_SCALAR) |
| 841 | Perl_croak(aTHX_ "Can't return array to lvalue" |
| 842 | " scalar context"); |
| 843 | SETs((SV*)av); |
| 844 | RETURN; |
| 845 | } |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | if (GIMME == G_ARRAY) { |
| 850 | const I32 maxarg = AvFILL(av) + 1; |
| 851 | (void)POPs; /* XXXX May be optimized away? */ |
| 852 | EXTEND(SP, maxarg); |
| 853 | if (SvRMAGICAL(av)) { |
| 854 | U32 i; |
| 855 | for (i=0; i < (U32)maxarg; i++) { |
| 856 | SV ** const svp = av_fetch(av, i, FALSE); |
| 857 | /* See note in pp_helem, and bug id #27839 */ |
| 858 | SP[i+1] = svp |
| 859 | ? SvGMAGICAL(*svp) ? sv_mortalcopy(*svp) : *svp |
| 860 | : &PL_sv_undef; |
| 861 | } |
| 862 | } |
| 863 | else { |
| 864 | Copy(AvARRAY(av), SP+1, maxarg, SV*); |
| 865 | } |
| 866 | SP += maxarg; |
| 867 | } |
| 868 | else if (GIMME_V == G_SCALAR) { |
| 869 | dTARGET; |
| 870 | const I32 maxarg = AvFILL(av) + 1; |
| 871 | SETi(maxarg); |
| 872 | } |
| 873 | RETURN; |
| 874 | } |
| 875 | |
| 876 | PP(pp_rv2hv) |
| 877 | { |
| 878 | dSP; dTOPss; |
| 879 | HV *hv; |
| 880 | const I32 gimme = GIMME_V; |
| 881 | static const char return_hash_to_lvalue_scalar[] = "Can't return hash to lvalue scalar context"; |
| 882 | |
| 883 | if (SvROK(sv)) { |
| 884 | wasref: |
| 885 | tryAMAGICunDEREF(to_hv); |
| 886 | |
| 887 | hv = (HV*)SvRV(sv); |
| 888 | if (SvTYPE(hv) != SVt_PVHV) |
| 889 | DIE(aTHX_ "Not a HASH reference"); |
| 890 | if (PL_op->op_flags & OPf_REF) { |
| 891 | SETs((SV*)hv); |
| 892 | RETURN; |
| 893 | } |
| 894 | else if (LVRET) { |
| 895 | if (gimme != G_ARRAY) |
| 896 | Perl_croak(aTHX_ return_hash_to_lvalue_scalar ); |
| 897 | SETs((SV*)hv); |
| 898 | RETURN; |
| 899 | } |
| 900 | else if (PL_op->op_flags & OPf_MOD |
| 901 | && PL_op->op_private & OPpLVAL_INTRO) |
| 902 | Perl_croak(aTHX_ PL_no_localize_ref); |
| 903 | } |
| 904 | else { |
| 905 | if (SvTYPE(sv) == SVt_PVHV) { |
| 906 | hv = (HV*)sv; |
| 907 | if (PL_op->op_flags & OPf_REF) { |
| 908 | SETs((SV*)hv); |
| 909 | RETURN; |
| 910 | } |
| 911 | else if (LVRET) { |
| 912 | if (gimme != G_ARRAY) |
| 913 | Perl_croak(aTHX_ return_hash_to_lvalue_scalar ); |
| 914 | SETs((SV*)hv); |
| 915 | RETURN; |
| 916 | } |
| 917 | } |
| 918 | else { |
| 919 | GV *gv; |
| 920 | |
| 921 | if (SvTYPE(sv) != SVt_PVGV) { |
| 922 | if (SvGMAGICAL(sv)) { |
| 923 | mg_get(sv); |
| 924 | if (SvROK(sv)) |
| 925 | goto wasref; |
| 926 | } |
| 927 | if (!SvOK(sv)) { |
| 928 | if (PL_op->op_flags & OPf_REF || |
| 929 | PL_op->op_private & HINT_STRICT_REFS) |
| 930 | DIE(aTHX_ PL_no_usym, "a HASH"); |
| 931 | if (ckWARN(WARN_UNINITIALIZED)) |
| 932 | report_uninit(sv); |
| 933 | if (gimme == G_ARRAY) { |
| 934 | SP--; |
| 935 | RETURN; |
| 936 | } |
| 937 | RETSETUNDEF; |
| 938 | } |
| 939 | if ((PL_op->op_flags & OPf_SPECIAL) && |
| 940 | !(PL_op->op_flags & OPf_MOD)) |
| 941 | { |
| 942 | gv = (GV*)gv_fetchsv(sv, 0, SVt_PVHV); |
| 943 | if (!gv |
| 944 | && (!is_gv_magical_sv(sv,0) |
| 945 | || !(gv = (GV*)gv_fetchsv(sv, GV_ADD, SVt_PVHV)))) |
| 946 | { |
| 947 | RETSETUNDEF; |
| 948 | } |
| 949 | } |
| 950 | else { |
| 951 | if (PL_op->op_private & HINT_STRICT_REFS) |
| 952 | DIE(aTHX_ PL_no_symref_sv, sv, "a HASH"); |
| 953 | gv = (GV*)gv_fetchsv(sv, GV_ADD, SVt_PVHV); |
| 954 | } |
| 955 | } |
| 956 | else { |
| 957 | gv = (GV*)sv; |
| 958 | } |
| 959 | hv = GvHVn(gv); |
| 960 | if (PL_op->op_private & OPpLVAL_INTRO) |
| 961 | hv = save_hash(gv); |
| 962 | if (PL_op->op_flags & OPf_REF) { |
| 963 | SETs((SV*)hv); |
| 964 | RETURN; |
| 965 | } |
| 966 | else if (LVRET) { |
| 967 | if (gimme != G_ARRAY) |
| 968 | Perl_croak(aTHX_ return_hash_to_lvalue_scalar ); |
| 969 | SETs((SV*)hv); |
| 970 | RETURN; |
| 971 | } |
| 972 | } |
| 973 | } |
| 974 | |
| 975 | if (gimme == G_ARRAY) { /* array wanted */ |
| 976 | *PL_stack_sp = (SV*)hv; |
| 977 | return do_kv(); |
| 978 | } |
| 979 | else if (gimme == G_SCALAR) { |
| 980 | dTARGET; |
| 981 | TARG = Perl_hv_scalar(aTHX_ hv); |
| 982 | SETTARG; |
| 983 | } |
| 984 | RETURN; |
| 985 | } |
| 986 | |
| 987 | STATIC void |
| 988 | S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem) |
| 989 | { |
| 990 | if (*relem) { |
| 991 | SV *tmpstr; |
| 992 | const HE *didstore; |
| 993 | |
| 994 | if (ckWARN(WARN_MISC)) { |
| 995 | const char *err; |
| 996 | if (relem == firstrelem && |
| 997 | SvROK(*relem) && |
| 998 | (SvTYPE(SvRV(*relem)) == SVt_PVAV || |
| 999 | SvTYPE(SvRV(*relem)) == SVt_PVHV)) |
| 1000 | { |
| 1001 | err = "Reference found where even-sized list expected"; |
| 1002 | } |
| 1003 | else |
| 1004 | err = "Odd number of elements in hash assignment"; |
| 1005 | Perl_warner(aTHX_ packWARN(WARN_MISC), err); |
| 1006 | } |
| 1007 | |
| 1008 | tmpstr = NEWSV(29,0); |
| 1009 | didstore = hv_store_ent(hash,*relem,tmpstr,0); |
| 1010 | if (SvMAGICAL(hash)) { |
| 1011 | if (SvSMAGICAL(tmpstr)) |
| 1012 | mg_set(tmpstr); |
| 1013 | if (!didstore) |
| 1014 | sv_2mortal(tmpstr); |
| 1015 | } |
| 1016 | TAINT_NOT; |
| 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | PP(pp_aassign) |
| 1021 | { |
| 1022 | dVAR; dSP; |
| 1023 | SV **lastlelem = PL_stack_sp; |
| 1024 | SV **lastrelem = PL_stack_base + POPMARK; |
| 1025 | SV **firstrelem = PL_stack_base + POPMARK + 1; |
| 1026 | SV **firstlelem = lastrelem + 1; |
| 1027 | |
| 1028 | register SV **relem; |
| 1029 | register SV **lelem; |
| 1030 | |
| 1031 | register SV *sv; |
| 1032 | register AV *ary; |
| 1033 | |
| 1034 | I32 gimme; |
| 1035 | HV *hash; |
| 1036 | I32 i; |
| 1037 | int magic; |
| 1038 | int duplicates = 0; |
| 1039 | SV **firsthashrelem = 0; /* "= 0" keeps gcc 2.95 quiet */ |
| 1040 | |
| 1041 | |
| 1042 | PL_delaymagic = DM_DELAY; /* catch simultaneous items */ |
| 1043 | gimme = GIMME_V; |
| 1044 | |
| 1045 | /* If there's a common identifier on both sides we have to take |
| 1046 | * special care that assigning the identifier on the left doesn't |
| 1047 | * clobber a value on the right that's used later in the list. |
| 1048 | */ |
| 1049 | if (PL_op->op_private & (OPpASSIGN_COMMON)) { |
| 1050 | EXTEND_MORTAL(lastrelem - firstrelem + 1); |
| 1051 | for (relem = firstrelem; relem <= lastrelem; relem++) { |
| 1052 | if ((sv = *relem)) { |
| 1053 | TAINT_NOT; /* Each item is independent */ |
| 1054 | *relem = sv_mortalcopy(sv); |
| 1055 | } |
| 1056 | } |
| 1057 | } |
| 1058 | |
| 1059 | relem = firstrelem; |
| 1060 | lelem = firstlelem; |
| 1061 | ary = Null(AV*); |
| 1062 | hash = Null(HV*); |
| 1063 | |
| 1064 | while (lelem <= lastlelem) { |
| 1065 | TAINT_NOT; /* Each item stands on its own, taintwise. */ |
| 1066 | sv = *lelem++; |
| 1067 | switch (SvTYPE(sv)) { |
| 1068 | case SVt_PVAV: |
| 1069 | ary = (AV*)sv; |
| 1070 | magic = SvMAGICAL(ary) != 0; |
| 1071 | av_clear(ary); |
| 1072 | av_extend(ary, lastrelem - relem); |
| 1073 | i = 0; |
| 1074 | while (relem <= lastrelem) { /* gobble up all the rest */ |
| 1075 | SV **didstore; |
| 1076 | assert(*relem); |
| 1077 | sv = newSVsv(*relem); |
| 1078 | *(relem++) = sv; |
| 1079 | didstore = av_store(ary,i++,sv); |
| 1080 | if (magic) { |
| 1081 | if (SvSMAGICAL(sv)) |
| 1082 | mg_set(sv); |
| 1083 | if (!didstore) |
| 1084 | sv_2mortal(sv); |
| 1085 | } |
| 1086 | TAINT_NOT; |
| 1087 | } |
| 1088 | break; |
| 1089 | case SVt_PVHV: { /* normal hash */ |
| 1090 | SV *tmpstr; |
| 1091 | |
| 1092 | hash = (HV*)sv; |
| 1093 | magic = SvMAGICAL(hash) != 0; |
| 1094 | hv_clear(hash); |
| 1095 | firsthashrelem = relem; |
| 1096 | |
| 1097 | while (relem < lastrelem) { /* gobble up all the rest */ |
| 1098 | HE *didstore; |
| 1099 | if (*relem) |
| 1100 | sv = *(relem++); |
| 1101 | else |
| 1102 | sv = &PL_sv_no, relem++; |
| 1103 | tmpstr = NEWSV(29,0); |
| 1104 | if (*relem) |
| 1105 | sv_setsv(tmpstr,*relem); /* value */ |
| 1106 | *(relem++) = tmpstr; |
| 1107 | if (gimme != G_VOID && hv_exists_ent(hash, sv, 0)) |
| 1108 | /* key overwrites an existing entry */ |
| 1109 | duplicates += 2; |
| 1110 | didstore = hv_store_ent(hash,sv,tmpstr,0); |
| 1111 | if (magic) { |
| 1112 | if (SvSMAGICAL(tmpstr)) |
| 1113 | mg_set(tmpstr); |
| 1114 | if (!didstore) |
| 1115 | sv_2mortal(tmpstr); |
| 1116 | } |
| 1117 | TAINT_NOT; |
| 1118 | } |
| 1119 | if (relem == lastrelem) { |
| 1120 | do_oddball(hash, relem, firstrelem); |
| 1121 | relem++; |
| 1122 | } |
| 1123 | } |
| 1124 | break; |
| 1125 | default: |
| 1126 | if (SvIMMORTAL(sv)) { |
| 1127 | if (relem <= lastrelem) |
| 1128 | relem++; |
| 1129 | break; |
| 1130 | } |
| 1131 | if (relem <= lastrelem) { |
| 1132 | sv_setsv(sv, *relem); |
| 1133 | *(relem++) = sv; |
| 1134 | } |
| 1135 | else |
| 1136 | sv_setsv(sv, &PL_sv_undef); |
| 1137 | SvSETMAGIC(sv); |
| 1138 | break; |
| 1139 | } |
| 1140 | } |
| 1141 | if (PL_delaymagic & ~DM_DELAY) { |
| 1142 | if (PL_delaymagic & DM_UID) { |
| 1143 | #ifdef HAS_SETRESUID |
| 1144 | (void)setresuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1, |
| 1145 | (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1, |
| 1146 | (Uid_t)-1); |
| 1147 | #else |
| 1148 | # ifdef HAS_SETREUID |
| 1149 | (void)setreuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1, |
| 1150 | (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1); |
| 1151 | # else |
| 1152 | # ifdef HAS_SETRUID |
| 1153 | if ((PL_delaymagic & DM_UID) == DM_RUID) { |
| 1154 | (void)setruid(PL_uid); |
| 1155 | PL_delaymagic &= ~DM_RUID; |
| 1156 | } |
| 1157 | # endif /* HAS_SETRUID */ |
| 1158 | # ifdef HAS_SETEUID |
| 1159 | if ((PL_delaymagic & DM_UID) == DM_EUID) { |
| 1160 | (void)seteuid(PL_euid); |
| 1161 | PL_delaymagic &= ~DM_EUID; |
| 1162 | } |
| 1163 | # endif /* HAS_SETEUID */ |
| 1164 | if (PL_delaymagic & DM_UID) { |
| 1165 | if (PL_uid != PL_euid) |
| 1166 | DIE(aTHX_ "No setreuid available"); |
| 1167 | (void)PerlProc_setuid(PL_uid); |
| 1168 | } |
| 1169 | # endif /* HAS_SETREUID */ |
| 1170 | #endif /* HAS_SETRESUID */ |
| 1171 | PL_uid = PerlProc_getuid(); |
| 1172 | PL_euid = PerlProc_geteuid(); |
| 1173 | } |
| 1174 | if (PL_delaymagic & DM_GID) { |
| 1175 | #ifdef HAS_SETRESGID |
| 1176 | (void)setresgid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1, |
| 1177 | (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1, |
| 1178 | (Gid_t)-1); |
| 1179 | #else |
| 1180 | # ifdef HAS_SETREGID |
| 1181 | (void)setregid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1, |
| 1182 | (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1); |
| 1183 | # else |
| 1184 | # ifdef HAS_SETRGID |
| 1185 | if ((PL_delaymagic & DM_GID) == DM_RGID) { |
| 1186 | (void)setrgid(PL_gid); |
| 1187 | PL_delaymagic &= ~DM_RGID; |
| 1188 | } |
| 1189 | # endif /* HAS_SETRGID */ |
| 1190 | # ifdef HAS_SETEGID |
| 1191 | if ((PL_delaymagic & DM_GID) == DM_EGID) { |
| 1192 | (void)setegid(PL_egid); |
| 1193 | PL_delaymagic &= ~DM_EGID; |
| 1194 | } |
| 1195 | # endif /* HAS_SETEGID */ |
| 1196 | if (PL_delaymagic & DM_GID) { |
| 1197 | if (PL_gid != PL_egid) |
| 1198 | DIE(aTHX_ "No setregid available"); |
| 1199 | (void)PerlProc_setgid(PL_gid); |
| 1200 | } |
| 1201 | # endif /* HAS_SETREGID */ |
| 1202 | #endif /* HAS_SETRESGID */ |
| 1203 | PL_gid = PerlProc_getgid(); |
| 1204 | PL_egid = PerlProc_getegid(); |
| 1205 | } |
| 1206 | PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid)); |
| 1207 | } |
| 1208 | PL_delaymagic = 0; |
| 1209 | |
| 1210 | if (gimme == G_VOID) |
| 1211 | SP = firstrelem - 1; |
| 1212 | else if (gimme == G_SCALAR) { |
| 1213 | dTARGET; |
| 1214 | SP = firstrelem; |
| 1215 | SETi(lastrelem - firstrelem + 1 - duplicates); |
| 1216 | } |
| 1217 | else { |
| 1218 | if (ary) |
| 1219 | SP = lastrelem; |
| 1220 | else if (hash) { |
| 1221 | if (duplicates) { |
| 1222 | /* Removes from the stack the entries which ended up as |
| 1223 | * duplicated keys in the hash (fix for [perl #24380]) */ |
| 1224 | Move(firsthashrelem + duplicates, |
| 1225 | firsthashrelem, duplicates, SV**); |
| 1226 | lastrelem -= duplicates; |
| 1227 | } |
| 1228 | SP = lastrelem; |
| 1229 | } |
| 1230 | else |
| 1231 | SP = firstrelem + (lastlelem - firstlelem); |
| 1232 | lelem = firstlelem + (relem - firstrelem); |
| 1233 | while (relem <= SP) |
| 1234 | *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef; |
| 1235 | } |
| 1236 | RETURN; |
| 1237 | } |
| 1238 | |
| 1239 | PP(pp_qr) |
| 1240 | { |
| 1241 | dSP; |
| 1242 | register PMOP * const pm = cPMOP; |
| 1243 | SV * const rv = sv_newmortal(); |
| 1244 | SV * const sv = newSVrv(rv, "Regexp"); |
| 1245 | if (pm->op_pmdynflags & PMdf_TAINTED) |
| 1246 | SvTAINTED_on(rv); |
| 1247 | sv_magic(sv,(SV*)ReREFCNT_inc(PM_GETRE(pm)), PERL_MAGIC_qr,0,0); |
| 1248 | RETURNX(PUSHs(rv)); |
| 1249 | } |
| 1250 | |
| 1251 | PP(pp_match) |
| 1252 | { |
| 1253 | dSP; dTARG; |
| 1254 | register PMOP *pm = cPMOP; |
| 1255 | PMOP *dynpm = pm; |
| 1256 | register const char *t; |
| 1257 | register const char *s; |
| 1258 | const char *strend; |
| 1259 | I32 global; |
| 1260 | I32 r_flags = REXEC_CHECKED; |
| 1261 | const char *truebase; /* Start of string */ |
| 1262 | register REGEXP *rx = PM_GETRE(pm); |
| 1263 | bool rxtainted; |
| 1264 | const I32 gimme = GIMME; |
| 1265 | STRLEN len; |
| 1266 | I32 minmatch = 0; |
| 1267 | const I32 oldsave = PL_savestack_ix; |
| 1268 | I32 update_minmatch = 1; |
| 1269 | I32 had_zerolen = 0; |
| 1270 | |
| 1271 | if (PL_op->op_flags & OPf_STACKED) |
| 1272 | TARG = POPs; |
| 1273 | else if (PL_op->op_private & OPpTARGET_MY) |
| 1274 | GETTARGET; |
| 1275 | else { |
| 1276 | TARG = DEFSV; |
| 1277 | EXTEND(SP,1); |
| 1278 | } |
| 1279 | |
| 1280 | PUTBACK; /* EVAL blocks need stack_sp. */ |
| 1281 | s = SvPV_const(TARG, len); |
| 1282 | if (!s) |
| 1283 | DIE(aTHX_ "panic: pp_match"); |
| 1284 | strend = s + len; |
| 1285 | rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) || |
| 1286 | (PL_tainted && (pm->op_pmflags & PMf_RETAINT))); |
| 1287 | TAINT_NOT; |
| 1288 | |
| 1289 | RX_MATCH_UTF8_set(rx, DO_UTF8(TARG)); |
| 1290 | |
| 1291 | /* PMdf_USED is set after a ?? matches once */ |
| 1292 | if (pm->op_pmdynflags & PMdf_USED) { |
| 1293 | failure: |
| 1294 | if (gimme == G_ARRAY) |
| 1295 | RETURN; |
| 1296 | RETPUSHNO; |
| 1297 | } |
| 1298 | |
| 1299 | /* empty pattern special-cased to use last successful pattern if possible */ |
| 1300 | if (!rx->prelen && PL_curpm) { |
| 1301 | pm = PL_curpm; |
| 1302 | rx = PM_GETRE(pm); |
| 1303 | } |
| 1304 | |
| 1305 | if (rx->minlen > (I32)len) |
| 1306 | goto failure; |
| 1307 | |
| 1308 | truebase = t = s; |
| 1309 | |
| 1310 | /* XXXX What part of this is needed with true \G-support? */ |
| 1311 | if ((global = dynpm->op_pmflags & PMf_GLOBAL)) { |
| 1312 | rx->startp[0] = -1; |
| 1313 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) { |
| 1314 | MAGIC* mg = mg_find(TARG, PERL_MAGIC_regex_global); |
| 1315 | if (mg && mg->mg_len >= 0) { |
| 1316 | if (!(rx->reganch & ROPT_GPOS_SEEN)) |
| 1317 | rx->endp[0] = rx->startp[0] = mg->mg_len; |
| 1318 | else if (rx->reganch & ROPT_ANCH_GPOS) { |
| 1319 | r_flags |= REXEC_IGNOREPOS; |
| 1320 | rx->endp[0] = rx->startp[0] = mg->mg_len; |
| 1321 | } |
| 1322 | minmatch = (mg->mg_flags & MGf_MINMATCH); |
| 1323 | update_minmatch = 0; |
| 1324 | } |
| 1325 | } |
| 1326 | } |
| 1327 | if ((!global && rx->nparens) |
| 1328 | || SvTEMP(TARG) || PL_sawampersand) |
| 1329 | r_flags |= REXEC_COPY_STR; |
| 1330 | if (SvSCREAM(TARG)) |
| 1331 | r_flags |= REXEC_SCREAM; |
| 1332 | |
| 1333 | play_it_again: |
| 1334 | if (global && rx->startp[0] != -1) { |
| 1335 | t = s = rx->endp[0] + truebase; |
| 1336 | if ((s + rx->minlen) > strend) |
| 1337 | goto nope; |
| 1338 | if (update_minmatch++) |
| 1339 | minmatch = had_zerolen; |
| 1340 | } |
| 1341 | if (rx->reganch & RE_USE_INTUIT && |
| 1342 | DO_UTF8(TARG) == ((rx->reganch & ROPT_UTF8) != 0)) { |
| 1343 | /* FIXME - can PL_bostr be made const char *? */ |
| 1344 | PL_bostr = (char *)truebase; |
| 1345 | s = CALLREG_INTUIT_START(aTHX_ rx, TARG, (char *)s, (char *)strend, r_flags, NULL); |
| 1346 | |
| 1347 | if (!s) |
| 1348 | goto nope; |
| 1349 | if ( (rx->reganch & ROPT_CHECK_ALL) |
| 1350 | && !PL_sawampersand |
| 1351 | && ((rx->reganch & ROPT_NOSCAN) |
| 1352 | || !((rx->reganch & RE_INTUIT_TAIL) |
| 1353 | && (r_flags & REXEC_SCREAM))) |
| 1354 | && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */ |
| 1355 | goto yup; |
| 1356 | } |
| 1357 | if (CALLREGEXEC(aTHX_ rx, (char*)s, (char *)strend, (char*)truebase, minmatch, TARG, NULL, r_flags)) |
| 1358 | { |
| 1359 | PL_curpm = pm; |
| 1360 | if (dynpm->op_pmflags & PMf_ONCE) |
| 1361 | dynpm->op_pmdynflags |= PMdf_USED; |
| 1362 | goto gotcha; |
| 1363 | } |
| 1364 | else |
| 1365 | goto ret_no; |
| 1366 | /*NOTREACHED*/ |
| 1367 | |
| 1368 | gotcha: |
| 1369 | if (rxtainted) |
| 1370 | RX_MATCH_TAINTED_on(rx); |
| 1371 | TAINT_IF(RX_MATCH_TAINTED(rx)); |
| 1372 | if (gimme == G_ARRAY) { |
| 1373 | const I32 nparens = rx->nparens; |
| 1374 | I32 i = (global && !nparens) ? 1 : 0; |
| 1375 | |
| 1376 | SPAGAIN; /* EVAL blocks could move the stack. */ |
| 1377 | EXTEND(SP, nparens + i); |
| 1378 | EXTEND_MORTAL(nparens + i); |
| 1379 | for (i = !i; i <= nparens; i++) { |
| 1380 | PUSHs(sv_newmortal()); |
| 1381 | if ((rx->startp[i] != -1) && rx->endp[i] != -1 ) { |
| 1382 | const I32 len = rx->endp[i] - rx->startp[i]; |
| 1383 | s = rx->startp[i] + truebase; |
| 1384 | if (rx->endp[i] < 0 || rx->startp[i] < 0 || |
| 1385 | len < 0 || len > strend - s) |
| 1386 | DIE(aTHX_ "panic: pp_match start/end pointers"); |
| 1387 | sv_setpvn(*SP, s, len); |
| 1388 | if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len)) |
| 1389 | SvUTF8_on(*SP); |
| 1390 | } |
| 1391 | } |
| 1392 | if (global) { |
| 1393 | if (dynpm->op_pmflags & PMf_CONTINUE) { |
| 1394 | MAGIC* mg = 0; |
| 1395 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) |
| 1396 | mg = mg_find(TARG, PERL_MAGIC_regex_global); |
| 1397 | if (!mg) { |
| 1398 | sv_magic(TARG, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0); |
| 1399 | mg = mg_find(TARG, PERL_MAGIC_regex_global); |
| 1400 | } |
| 1401 | if (rx->startp[0] != -1) { |
| 1402 | mg->mg_len = rx->endp[0]; |
| 1403 | if (rx->startp[0] == rx->endp[0]) |
| 1404 | mg->mg_flags |= MGf_MINMATCH; |
| 1405 | else |
| 1406 | mg->mg_flags &= ~MGf_MINMATCH; |
| 1407 | } |
| 1408 | } |
| 1409 | had_zerolen = (rx->startp[0] != -1 |
| 1410 | && rx->startp[0] == rx->endp[0]); |
| 1411 | PUTBACK; /* EVAL blocks may use stack */ |
| 1412 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
| 1413 | goto play_it_again; |
| 1414 | } |
| 1415 | else if (!nparens) |
| 1416 | XPUSHs(&PL_sv_yes); |
| 1417 | LEAVE_SCOPE(oldsave); |
| 1418 | RETURN; |
| 1419 | } |
| 1420 | else { |
| 1421 | if (global) { |
| 1422 | MAGIC* mg = 0; |
| 1423 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) |
| 1424 | mg = mg_find(TARG, PERL_MAGIC_regex_global); |
| 1425 | if (!mg) { |
| 1426 | sv_magic(TARG, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0); |
| 1427 | mg = mg_find(TARG, PERL_MAGIC_regex_global); |
| 1428 | } |
| 1429 | if (rx->startp[0] != -1) { |
| 1430 | mg->mg_len = rx->endp[0]; |
| 1431 | if (rx->startp[0] == rx->endp[0]) |
| 1432 | mg->mg_flags |= MGf_MINMATCH; |
| 1433 | else |
| 1434 | mg->mg_flags &= ~MGf_MINMATCH; |
| 1435 | } |
| 1436 | } |
| 1437 | LEAVE_SCOPE(oldsave); |
| 1438 | RETPUSHYES; |
| 1439 | } |
| 1440 | |
| 1441 | yup: /* Confirmed by INTUIT */ |
| 1442 | if (rxtainted) |
| 1443 | RX_MATCH_TAINTED_on(rx); |
| 1444 | TAINT_IF(RX_MATCH_TAINTED(rx)); |
| 1445 | PL_curpm = pm; |
| 1446 | if (dynpm->op_pmflags & PMf_ONCE) |
| 1447 | dynpm->op_pmdynflags |= PMdf_USED; |
| 1448 | if (RX_MATCH_COPIED(rx)) |
| 1449 | Safefree(rx->subbeg); |
| 1450 | RX_MATCH_COPIED_off(rx); |
| 1451 | rx->subbeg = Nullch; |
| 1452 | if (global) { |
| 1453 | /* FIXME - should rx->subbeg be const char *? */ |
| 1454 | rx->subbeg = (char *) truebase; |
| 1455 | rx->startp[0] = s - truebase; |
| 1456 | if (RX_MATCH_UTF8(rx)) { |
| 1457 | char * const t = (char*)utf8_hop((U8*)s, rx->minlen); |
| 1458 | rx->endp[0] = t - truebase; |
| 1459 | } |
| 1460 | else { |
| 1461 | rx->endp[0] = s - truebase + rx->minlen; |
| 1462 | } |
| 1463 | rx->sublen = strend - truebase; |
| 1464 | goto gotcha; |
| 1465 | } |
| 1466 | if (PL_sawampersand) { |
| 1467 | I32 off; |
| 1468 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 1469 | if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) { |
| 1470 | if (DEBUG_C_TEST) { |
| 1471 | PerlIO_printf(Perl_debug_log, |
| 1472 | "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n", |
| 1473 | (int) SvTYPE(TARG), truebase, t, |
| 1474 | (int)(t-truebase)); |
| 1475 | } |
| 1476 | rx->saved_copy = sv_setsv_cow(rx->saved_copy, TARG); |
| 1477 | rx->subbeg = (char *) SvPVX_const(rx->saved_copy) + (t - truebase); |
| 1478 | assert (SvPOKp(rx->saved_copy)); |
| 1479 | } else |
| 1480 | #endif |
| 1481 | { |
| 1482 | |
| 1483 | rx->subbeg = savepvn(t, strend - t); |
| 1484 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 1485 | rx->saved_copy = Nullsv; |
| 1486 | #endif |
| 1487 | } |
| 1488 | rx->sublen = strend - t; |
| 1489 | RX_MATCH_COPIED_on(rx); |
| 1490 | off = rx->startp[0] = s - t; |
| 1491 | rx->endp[0] = off + rx->minlen; |
| 1492 | } |
| 1493 | else { /* startp/endp are used by @- @+. */ |
| 1494 | rx->startp[0] = s - truebase; |
| 1495 | rx->endp[0] = s - truebase + rx->minlen; |
| 1496 | } |
| 1497 | rx->nparens = rx->lastparen = rx->lastcloseparen = 0; /* used by @-, @+, and $^N */ |
| 1498 | LEAVE_SCOPE(oldsave); |
| 1499 | RETPUSHYES; |
| 1500 | |
| 1501 | nope: |
| 1502 | ret_no: |
| 1503 | if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) { |
| 1504 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) { |
| 1505 | MAGIC* mg = mg_find(TARG, PERL_MAGIC_regex_global); |
| 1506 | if (mg) |
| 1507 | mg->mg_len = -1; |
| 1508 | } |
| 1509 | } |
| 1510 | LEAVE_SCOPE(oldsave); |
| 1511 | if (gimme == G_ARRAY) |
| 1512 | RETURN; |
| 1513 | RETPUSHNO; |
| 1514 | } |
| 1515 | |
| 1516 | OP * |
| 1517 | Perl_do_readline(pTHX) |
| 1518 | { |
| 1519 | dVAR; dSP; dTARGETSTACKED; |
| 1520 | register SV *sv; |
| 1521 | STRLEN tmplen = 0; |
| 1522 | STRLEN offset; |
| 1523 | PerlIO *fp; |
| 1524 | register IO * const io = GvIO(PL_last_in_gv); |
| 1525 | register const I32 type = PL_op->op_type; |
| 1526 | const I32 gimme = GIMME_V; |
| 1527 | MAGIC *mg; |
| 1528 | |
| 1529 | if (io && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar))) { |
| 1530 | PUSHMARK(SP); |
| 1531 | XPUSHs(SvTIED_obj((SV*)io, mg)); |
| 1532 | PUTBACK; |
| 1533 | ENTER; |
| 1534 | call_method("READLINE", gimme); |
| 1535 | LEAVE; |
| 1536 | SPAGAIN; |
| 1537 | if (gimme == G_SCALAR) { |
| 1538 | SV* result = POPs; |
| 1539 | SvSetSV_nosteal(TARG, result); |
| 1540 | PUSHTARG; |
| 1541 | } |
| 1542 | RETURN; |
| 1543 | } |
| 1544 | fp = Nullfp; |
| 1545 | if (io) { |
| 1546 | fp = IoIFP(io); |
| 1547 | if (!fp) { |
| 1548 | if (IoFLAGS(io) & IOf_ARGV) { |
| 1549 | if (IoFLAGS(io) & IOf_START) { |
| 1550 | IoLINES(io) = 0; |
| 1551 | if (av_len(GvAVn(PL_last_in_gv)) < 0) { |
| 1552 | IoFLAGS(io) &= ~IOf_START; |
| 1553 | do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,Nullfp); |
| 1554 | sv_setpvn(GvSVn(PL_last_in_gv), "-", 1); |
| 1555 | SvSETMAGIC(GvSV(PL_last_in_gv)); |
| 1556 | fp = IoIFP(io); |
| 1557 | goto have_fp; |
| 1558 | } |
| 1559 | } |
| 1560 | fp = nextargv(PL_last_in_gv); |
| 1561 | if (!fp) { /* Note: fp != IoIFP(io) */ |
| 1562 | (void)do_close(PL_last_in_gv, FALSE); /* now it does*/ |
| 1563 | } |
| 1564 | } |
| 1565 | else if (type == OP_GLOB) |
| 1566 | fp = Perl_start_glob(aTHX_ POPs, io); |
| 1567 | } |
| 1568 | else if (type == OP_GLOB) |
| 1569 | SP--; |
| 1570 | else if (ckWARN(WARN_IO) && IoTYPE(io) == IoTYPE_WRONLY) { |
| 1571 | report_evil_fh(PL_last_in_gv, io, OP_phoney_OUTPUT_ONLY); |
| 1572 | } |
| 1573 | } |
| 1574 | if (!fp) { |
| 1575 | if ((!io || !(IoFLAGS(io) & IOf_START)) |
| 1576 | && ckWARN2(WARN_GLOB, WARN_CLOSED)) |
| 1577 | { |
| 1578 | if (type == OP_GLOB) |
| 1579 | Perl_warner(aTHX_ packWARN(WARN_GLOB), |
| 1580 | "glob failed (can't start child: %s)", |
| 1581 | Strerror(errno)); |
| 1582 | else |
| 1583 | report_evil_fh(PL_last_in_gv, io, PL_op->op_type); |
| 1584 | } |
| 1585 | if (gimme == G_SCALAR) { |
| 1586 | /* undef TARG, and push that undefined value */ |
| 1587 | if (type != OP_RCATLINE) { |
| 1588 | SV_CHECK_THINKFIRST_COW_DROP(TARG); |
| 1589 | SvOK_off(TARG); |
| 1590 | } |
| 1591 | PUSHTARG; |
| 1592 | } |
| 1593 | RETURN; |
| 1594 | } |
| 1595 | have_fp: |
| 1596 | if (gimme == G_SCALAR) { |
| 1597 | sv = TARG; |
| 1598 | if (SvROK(sv)) |
| 1599 | sv_unref(sv); |
| 1600 | SvUPGRADE(sv, SVt_PV); |
| 1601 | tmplen = SvLEN(sv); /* remember if already alloced */ |
| 1602 | if (!tmplen && !SvREADONLY(sv)) |
| 1603 | Sv_Grow(sv, 80); /* try short-buffering it */ |
| 1604 | offset = 0; |
| 1605 | if (type == OP_RCATLINE && SvOK(sv)) { |
| 1606 | if (!SvPOK(sv)) { |
| 1607 | SvPV_force_nolen(sv); |
| 1608 | } |
| 1609 | offset = SvCUR(sv); |
| 1610 | } |
| 1611 | } |
| 1612 | else { |
| 1613 | sv = sv_2mortal(NEWSV(57, 80)); |
| 1614 | offset = 0; |
| 1615 | } |
| 1616 | |
| 1617 | /* This should not be marked tainted if the fp is marked clean */ |
| 1618 | #define MAYBE_TAINT_LINE(io, sv) \ |
| 1619 | if (!(IoFLAGS(io) & IOf_UNTAINT)) { \ |
| 1620 | TAINT; \ |
| 1621 | SvTAINTED_on(sv); \ |
| 1622 | } |
| 1623 | |
| 1624 | /* delay EOF state for a snarfed empty file */ |
| 1625 | #define SNARF_EOF(gimme,rs,io,sv) \ |
| 1626 | (gimme != G_SCALAR || SvCUR(sv) \ |
| 1627 | || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs)) |
| 1628 | |
| 1629 | for (;;) { |
| 1630 | PUTBACK; |
| 1631 | if (!sv_gets(sv, fp, offset) |
| 1632 | && (type == OP_GLOB |
| 1633 | || SNARF_EOF(gimme, PL_rs, io, sv) |
| 1634 | || PerlIO_error(fp))) |
| 1635 | { |
| 1636 | PerlIO_clearerr(fp); |
| 1637 | if (IoFLAGS(io) & IOf_ARGV) { |
| 1638 | fp = nextargv(PL_last_in_gv); |
| 1639 | if (fp) |
| 1640 | continue; |
| 1641 | (void)do_close(PL_last_in_gv, FALSE); |
| 1642 | } |
| 1643 | else if (type == OP_GLOB) { |
| 1644 | if (!do_close(PL_last_in_gv, FALSE) && ckWARN(WARN_GLOB)) { |
| 1645 | Perl_warner(aTHX_ packWARN(WARN_GLOB), |
| 1646 | "glob failed (child exited with status %d%s)", |
| 1647 | (int)(STATUS_CURRENT >> 8), |
| 1648 | (STATUS_CURRENT & 0x80) ? ", core dumped" : ""); |
| 1649 | } |
| 1650 | } |
| 1651 | if (gimme == G_SCALAR) { |
| 1652 | if (type != OP_RCATLINE) { |
| 1653 | SV_CHECK_THINKFIRST_COW_DROP(TARG); |
| 1654 | SvOK_off(TARG); |
| 1655 | } |
| 1656 | SPAGAIN; |
| 1657 | PUSHTARG; |
| 1658 | } |
| 1659 | MAYBE_TAINT_LINE(io, sv); |
| 1660 | RETURN; |
| 1661 | } |
| 1662 | MAYBE_TAINT_LINE(io, sv); |
| 1663 | IoLINES(io)++; |
| 1664 | IoFLAGS(io) |= IOf_NOLINE; |
| 1665 | SvSETMAGIC(sv); |
| 1666 | SPAGAIN; |
| 1667 | XPUSHs(sv); |
| 1668 | if (type == OP_GLOB) { |
| 1669 | char *tmps; |
| 1670 | const char *t1; |
| 1671 | |
| 1672 | if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) { |
| 1673 | tmps = SvEND(sv) - 1; |
| 1674 | if (*tmps == *SvPVX_const(PL_rs)) { |
| 1675 | *tmps = '\0'; |
| 1676 | SvCUR_set(sv, SvCUR(sv) - 1); |
| 1677 | } |
| 1678 | } |
| 1679 | for (t1 = SvPVX_const(sv); *t1; t1++) |
| 1680 | if (!isALPHA(*t1) && !isDIGIT(*t1) && |
| 1681 | strchr("$&*(){}[]'\";\\|?<>~`", *t1)) |
| 1682 | break; |
| 1683 | if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) { |
| 1684 | (void)POPs; /* Unmatched wildcard? Chuck it... */ |
| 1685 | continue; |
| 1686 | } |
| 1687 | } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */ |
| 1688 | const U8 *s = (const U8*)SvPVX_const(sv) + offset; |
| 1689 | const STRLEN len = SvCUR(sv) - offset; |
| 1690 | const U8 *f; |
| 1691 | |
| 1692 | if (ckWARN(WARN_UTF8) && |
| 1693 | !is_utf8_string_loc(s, len, &f)) |
| 1694 | /* Emulate :encoding(utf8) warning in the same case. */ |
| 1695 | Perl_warner(aTHX_ packWARN(WARN_UTF8), |
| 1696 | "utf8 \"\\x%02X\" does not map to Unicode", |
| 1697 | f < (U8*)SvEND(sv) ? *f : 0); |
| 1698 | } |
| 1699 | if (gimme == G_ARRAY) { |
| 1700 | if (SvLEN(sv) - SvCUR(sv) > 20) { |
| 1701 | SvPV_shrink_to_cur(sv); |
| 1702 | } |
| 1703 | sv = sv_2mortal(NEWSV(58, 80)); |
| 1704 | continue; |
| 1705 | } |
| 1706 | else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) { |
| 1707 | /* try to reclaim a bit of scalar space (only on 1st alloc) */ |
| 1708 | const STRLEN new_len |
| 1709 | = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */ |
| 1710 | SvPV_renew(sv, new_len); |
| 1711 | } |
| 1712 | RETURN; |
| 1713 | } |
| 1714 | } |
| 1715 | |
| 1716 | PP(pp_enter) |
| 1717 | { |
| 1718 | dVAR; dSP; |
| 1719 | register PERL_CONTEXT *cx; |
| 1720 | I32 gimme = OP_GIMME(PL_op, -1); |
| 1721 | |
| 1722 | if (gimme == -1) { |
| 1723 | if (cxstack_ix >= 0) |
| 1724 | gimme = cxstack[cxstack_ix].blk_gimme; |
| 1725 | else |
| 1726 | gimme = G_SCALAR; |
| 1727 | } |
| 1728 | |
| 1729 | ENTER; |
| 1730 | |
| 1731 | SAVETMPS; |
| 1732 | PUSHBLOCK(cx, CXt_BLOCK, SP); |
| 1733 | |
| 1734 | RETURN; |
| 1735 | } |
| 1736 | |
| 1737 | PP(pp_helem) |
| 1738 | { |
| 1739 | dSP; |
| 1740 | HE* he; |
| 1741 | SV **svp; |
| 1742 | SV *keysv = POPs; |
| 1743 | HV *hv = (HV*)POPs; |
| 1744 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
| 1745 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; |
| 1746 | SV *sv; |
| 1747 | const U32 hash = (SvIsCOW_shared_hash(keysv)) ? SvSHARED_HASH(keysv) : 0; |
| 1748 | I32 preeminent = 0; |
| 1749 | |
| 1750 | if (SvTYPE(hv) == SVt_PVHV) { |
| 1751 | if (PL_op->op_private & OPpLVAL_INTRO) { |
| 1752 | MAGIC *mg; |
| 1753 | HV *stash; |
| 1754 | /* does the element we're localizing already exist? */ |
| 1755 | preeminent = |
| 1756 | /* can we determine whether it exists? */ |
| 1757 | ( !SvRMAGICAL(hv) |
| 1758 | || mg_find((SV*)hv, PERL_MAGIC_env) |
| 1759 | || ( (mg = mg_find((SV*)hv, PERL_MAGIC_tied)) |
| 1760 | /* Try to preserve the existenceness of a tied hash |
| 1761 | * element by using EXISTS and DELETE if possible. |
| 1762 | * Fallback to FETCH and STORE otherwise */ |
| 1763 | && (stash = SvSTASH(SvRV(SvTIED_obj((SV*)hv, mg)))) |
| 1764 | && gv_fetchmethod_autoload(stash, "EXISTS", TRUE) |
| 1765 | && gv_fetchmethod_autoload(stash, "DELETE", TRUE) |
| 1766 | ) |
| 1767 | ) ? hv_exists_ent(hv, keysv, 0) : 1; |
| 1768 | |
| 1769 | } |
| 1770 | he = hv_fetch_ent(hv, keysv, lval && !defer, hash); |
| 1771 | svp = he ? &HeVAL(he) : 0; |
| 1772 | } |
| 1773 | else { |
| 1774 | RETPUSHUNDEF; |
| 1775 | } |
| 1776 | if (lval) { |
| 1777 | if (!svp || *svp == &PL_sv_undef) { |
| 1778 | SV* lv; |
| 1779 | SV* key2; |
| 1780 | if (!defer) { |
| 1781 | DIE(aTHX_ PL_no_helem_sv, keysv); |
| 1782 | } |
| 1783 | lv = sv_newmortal(); |
| 1784 | sv_upgrade(lv, SVt_PVLV); |
| 1785 | LvTYPE(lv) = 'y'; |
| 1786 | sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, Nullch, 0); |
| 1787 | SvREFCNT_dec(key2); /* sv_magic() increments refcount */ |
| 1788 | LvTARG(lv) = SvREFCNT_inc(hv); |
| 1789 | LvTARGLEN(lv) = 1; |
| 1790 | PUSHs(lv); |
| 1791 | RETURN; |
| 1792 | } |
| 1793 | if (PL_op->op_private & OPpLVAL_INTRO) { |
| 1794 | if (HvNAME_get(hv) && isGV(*svp)) |
| 1795 | save_gp((GV*)*svp, !(PL_op->op_flags & OPf_SPECIAL)); |
| 1796 | else { |
| 1797 | if (!preeminent) { |
| 1798 | STRLEN keylen; |
| 1799 | const char * const key = SvPV_const(keysv, keylen); |
| 1800 | SAVEDELETE(hv, savepvn(key,keylen), keylen); |
| 1801 | } else |
| 1802 | save_helem(hv, keysv, svp); |
| 1803 | } |
| 1804 | } |
| 1805 | else if (PL_op->op_private & OPpDEREF) |
| 1806 | vivify_ref(*svp, PL_op->op_private & OPpDEREF); |
| 1807 | } |
| 1808 | sv = (svp ? *svp : &PL_sv_undef); |
| 1809 | /* This makes C<local $tied{foo} = $tied{foo}> possible. |
| 1810 | * Pushing the magical RHS on to the stack is useless, since |
| 1811 | * that magic is soon destined to be misled by the local(), |
| 1812 | * and thus the later pp_sassign() will fail to mg_get() the |
| 1813 | * old value. This should also cure problems with delayed |
| 1814 | * mg_get()s. GSAR 98-07-03 */ |
| 1815 | if (!lval && SvGMAGICAL(sv)) |
| 1816 | sv = sv_mortalcopy(sv); |
| 1817 | PUSHs(sv); |
| 1818 | RETURN; |
| 1819 | } |
| 1820 | |
| 1821 | PP(pp_leave) |
| 1822 | { |
| 1823 | dVAR; dSP; |
| 1824 | register PERL_CONTEXT *cx; |
| 1825 | SV **newsp; |
| 1826 | PMOP *newpm; |
| 1827 | I32 gimme; |
| 1828 | |
| 1829 | if (PL_op->op_flags & OPf_SPECIAL) { |
| 1830 | cx = &cxstack[cxstack_ix]; |
| 1831 | cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */ |
| 1832 | } |
| 1833 | |
| 1834 | POPBLOCK(cx,newpm); |
| 1835 | |
| 1836 | gimme = OP_GIMME(PL_op, -1); |
| 1837 | if (gimme == -1) { |
| 1838 | if (cxstack_ix >= 0) |
| 1839 | gimme = cxstack[cxstack_ix].blk_gimme; |
| 1840 | else |
| 1841 | gimme = G_SCALAR; |
| 1842 | } |
| 1843 | |
| 1844 | TAINT_NOT; |
| 1845 | if (gimme == G_VOID) |
| 1846 | SP = newsp; |
| 1847 | else if (gimme == G_SCALAR) { |
| 1848 | register SV **mark; |
| 1849 | MARK = newsp + 1; |
| 1850 | if (MARK <= SP) { |
| 1851 | if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP)) |
| 1852 | *MARK = TOPs; |
| 1853 | else |
| 1854 | *MARK = sv_mortalcopy(TOPs); |
| 1855 | } else { |
| 1856 | MEXTEND(mark,0); |
| 1857 | *MARK = &PL_sv_undef; |
| 1858 | } |
| 1859 | SP = MARK; |
| 1860 | } |
| 1861 | else if (gimme == G_ARRAY) { |
| 1862 | /* in case LEAVE wipes old return values */ |
| 1863 | register SV **mark; |
| 1864 | for (mark = newsp + 1; mark <= SP; mark++) { |
| 1865 | if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) { |
| 1866 | *mark = sv_mortalcopy(*mark); |
| 1867 | TAINT_NOT; /* Each item is independent */ |
| 1868 | } |
| 1869 | } |
| 1870 | } |
| 1871 | PL_curpm = newpm; /* Don't pop $1 et al till now */ |
| 1872 | |
| 1873 | LEAVE; |
| 1874 | |
| 1875 | RETURN; |
| 1876 | } |
| 1877 | |
| 1878 | PP(pp_iter) |
| 1879 | { |
| 1880 | dSP; |
| 1881 | register PERL_CONTEXT *cx; |
| 1882 | SV *sv, *oldsv; |
| 1883 | AV* av; |
| 1884 | SV **itersvp; |
| 1885 | |
| 1886 | EXTEND(SP, 1); |
| 1887 | cx = &cxstack[cxstack_ix]; |
| 1888 | if (CxTYPE(cx) != CXt_LOOP) |
| 1889 | DIE(aTHX_ "panic: pp_iter"); |
| 1890 | |
| 1891 | itersvp = CxITERVAR(cx); |
| 1892 | av = cx->blk_loop.iterary; |
| 1893 | if (SvTYPE(av) != SVt_PVAV) { |
| 1894 | /* iterate ($min .. $max) */ |
| 1895 | if (cx->blk_loop.iterlval) { |
| 1896 | /* string increment */ |
| 1897 | register SV* cur = cx->blk_loop.iterlval; |
| 1898 | STRLEN maxlen = 0; |
| 1899 | const char *max = SvOK((SV*)av) ? SvPV_const((SV*)av, maxlen) : ""; |
| 1900 | if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) { |
| 1901 | if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) { |
| 1902 | /* safe to reuse old SV */ |
| 1903 | sv_setsv(*itersvp, cur); |
| 1904 | } |
| 1905 | else |
| 1906 | { |
| 1907 | /* we need a fresh SV every time so that loop body sees a |
| 1908 | * completely new SV for closures/references to work as |
| 1909 | * they used to */ |
| 1910 | oldsv = *itersvp; |
| 1911 | *itersvp = newSVsv(cur); |
| 1912 | SvREFCNT_dec(oldsv); |
| 1913 | } |
| 1914 | if (strEQ(SvPVX_const(cur), max)) |
| 1915 | sv_setiv(cur, 0); /* terminate next time */ |
| 1916 | else |
| 1917 | sv_inc(cur); |
| 1918 | RETPUSHYES; |
| 1919 | } |
| 1920 | RETPUSHNO; |
| 1921 | } |
| 1922 | /* integer increment */ |
| 1923 | if (cx->blk_loop.iterix > cx->blk_loop.itermax) |
| 1924 | RETPUSHNO; |
| 1925 | |
| 1926 | /* don't risk potential race */ |
| 1927 | if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) { |
| 1928 | /* safe to reuse old SV */ |
| 1929 | sv_setiv(*itersvp, cx->blk_loop.iterix++); |
| 1930 | } |
| 1931 | else |
| 1932 | { |
| 1933 | /* we need a fresh SV every time so that loop body sees a |
| 1934 | * completely new SV for closures/references to work as they |
| 1935 | * used to */ |
| 1936 | oldsv = *itersvp; |
| 1937 | *itersvp = newSViv(cx->blk_loop.iterix++); |
| 1938 | SvREFCNT_dec(oldsv); |
| 1939 | } |
| 1940 | RETPUSHYES; |
| 1941 | } |
| 1942 | |
| 1943 | /* iterate array */ |
| 1944 | if (PL_op->op_private & OPpITER_REVERSED) { |
| 1945 | /* In reverse, use itermax as the min :-) */ |
| 1946 | if (cx->blk_loop.iterix <= cx->blk_loop.itermax) |
| 1947 | RETPUSHNO; |
| 1948 | |
| 1949 | if (SvMAGICAL(av) || AvREIFY(av)) { |
| 1950 | SV ** const svp = av_fetch(av, --cx->blk_loop.iterix, FALSE); |
| 1951 | sv = svp ? *svp : Nullsv; |
| 1952 | } |
| 1953 | else { |
| 1954 | sv = AvARRAY(av)[--cx->blk_loop.iterix]; |
| 1955 | } |
| 1956 | } |
| 1957 | else { |
| 1958 | if (cx->blk_loop.iterix >= (av == PL_curstack ? cx->blk_oldsp : |
| 1959 | AvFILL(av))) |
| 1960 | RETPUSHNO; |
| 1961 | |
| 1962 | if (SvMAGICAL(av) || AvREIFY(av)) { |
| 1963 | SV ** const svp = av_fetch(av, ++cx->blk_loop.iterix, FALSE); |
| 1964 | sv = svp ? *svp : Nullsv; |
| 1965 | } |
| 1966 | else { |
| 1967 | sv = AvARRAY(av)[++cx->blk_loop.iterix]; |
| 1968 | } |
| 1969 | } |
| 1970 | |
| 1971 | if (sv && SvIS_FREED(sv)) { |
| 1972 | *itersvp = Nullsv; |
| 1973 | Perl_croak(aTHX_ "Use of freed value in iteration"); |
| 1974 | } |
| 1975 | |
| 1976 | if (sv) |
| 1977 | SvTEMP_off(sv); |
| 1978 | else |
| 1979 | sv = &PL_sv_undef; |
| 1980 | if (av != PL_curstack && sv == &PL_sv_undef) { |
| 1981 | SV *lv = cx->blk_loop.iterlval; |
| 1982 | if (lv && SvREFCNT(lv) > 1) { |
| 1983 | SvREFCNT_dec(lv); |
| 1984 | lv = Nullsv; |
| 1985 | } |
| 1986 | if (lv) |
| 1987 | SvREFCNT_dec(LvTARG(lv)); |
| 1988 | else { |
| 1989 | lv = cx->blk_loop.iterlval = NEWSV(26, 0); |
| 1990 | sv_upgrade(lv, SVt_PVLV); |
| 1991 | LvTYPE(lv) = 'y'; |
| 1992 | sv_magic(lv, Nullsv, PERL_MAGIC_defelem, Nullch, 0); |
| 1993 | } |
| 1994 | LvTARG(lv) = SvREFCNT_inc(av); |
| 1995 | LvTARGOFF(lv) = cx->blk_loop.iterix; |
| 1996 | LvTARGLEN(lv) = (STRLEN)UV_MAX; |
| 1997 | sv = (SV*)lv; |
| 1998 | } |
| 1999 | |
| 2000 | oldsv = *itersvp; |
| 2001 | *itersvp = SvREFCNT_inc(sv); |
| 2002 | SvREFCNT_dec(oldsv); |
| 2003 | |
| 2004 | RETPUSHYES; |
| 2005 | } |
| 2006 | |
| 2007 | PP(pp_subst) |
| 2008 | { |
| 2009 | dSP; dTARG; |
| 2010 | register PMOP *pm = cPMOP; |
| 2011 | PMOP *rpm = pm; |
| 2012 | register SV *dstr; |
| 2013 | register char *s; |
| 2014 | char *strend; |
| 2015 | register char *m; |
| 2016 | const char *c; |
| 2017 | register char *d; |
| 2018 | STRLEN clen; |
| 2019 | I32 iters = 0; |
| 2020 | I32 maxiters; |
| 2021 | register I32 i; |
| 2022 | bool once; |
| 2023 | bool rxtainted; |
| 2024 | char *orig; |
| 2025 | I32 r_flags; |
| 2026 | register REGEXP *rx = PM_GETRE(pm); |
| 2027 | STRLEN len; |
| 2028 | int force_on_match = 0; |
| 2029 | const I32 oldsave = PL_savestack_ix; |
| 2030 | STRLEN slen; |
| 2031 | bool doutf8 = FALSE; |
| 2032 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 2033 | bool is_cow; |
| 2034 | #endif |
| 2035 | SV *nsv = Nullsv; |
| 2036 | |
| 2037 | /* known replacement string? */ |
| 2038 | dstr = (pm->op_pmflags & PMf_CONST) ? POPs : Nullsv; |
| 2039 | if (PL_op->op_flags & OPf_STACKED) |
| 2040 | TARG = POPs; |
| 2041 | else if (PL_op->op_private & OPpTARGET_MY) |
| 2042 | GETTARGET; |
| 2043 | else { |
| 2044 | TARG = DEFSV; |
| 2045 | EXTEND(SP,1); |
| 2046 | } |
| 2047 | |
| 2048 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 2049 | /* Awooga. Awooga. "bool" types that are actually char are dangerous, |
| 2050 | because they make integers such as 256 "false". */ |
| 2051 | is_cow = SvIsCOW(TARG) ? TRUE : FALSE; |
| 2052 | #else |
| 2053 | if (SvIsCOW(TARG)) |
| 2054 | sv_force_normal_flags(TARG,0); |
| 2055 | #endif |
| 2056 | if ( |
| 2057 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 2058 | !is_cow && |
| 2059 | #endif |
| 2060 | (SvREADONLY(TARG) |
| 2061 | || ( (SvTYPE(TARG) == SVt_PVGV || SvTYPE(TARG) > SVt_PVLV) |
| 2062 | && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))) |
| 2063 | DIE(aTHX_ PL_no_modify); |
| 2064 | PUTBACK; |
| 2065 | |
| 2066 | s = SvPV_mutable(TARG, len); |
| 2067 | if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV) |
| 2068 | force_on_match = 1; |
| 2069 | rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) || |
| 2070 | (PL_tainted && (pm->op_pmflags & PMf_RETAINT))); |
| 2071 | if (PL_tainted) |
| 2072 | rxtainted |= 2; |
| 2073 | TAINT_NOT; |
| 2074 | |
| 2075 | RX_MATCH_UTF8_set(rx, DO_UTF8(TARG)); |
| 2076 | |
| 2077 | force_it: |
| 2078 | if (!pm || !s) |
| 2079 | DIE(aTHX_ "panic: pp_subst"); |
| 2080 | |
| 2081 | strend = s + len; |
| 2082 | slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len; |
| 2083 | maxiters = 2 * slen + 10; /* We can match twice at each |
| 2084 | position, once with zero-length, |
| 2085 | second time with non-zero. */ |
| 2086 | |
| 2087 | if (!rx->prelen && PL_curpm) { |
| 2088 | pm = PL_curpm; |
| 2089 | rx = PM_GETRE(pm); |
| 2090 | } |
| 2091 | r_flags = (rx->nparens || SvTEMP(TARG) || PL_sawampersand) |
| 2092 | ? REXEC_COPY_STR : 0; |
| 2093 | if (SvSCREAM(TARG)) |
| 2094 | r_flags |= REXEC_SCREAM; |
| 2095 | |
| 2096 | orig = m = s; |
| 2097 | if (rx->reganch & RE_USE_INTUIT) { |
| 2098 | PL_bostr = orig; |
| 2099 | s = CALLREG_INTUIT_START(aTHX_ rx, TARG, s, strend, r_flags, NULL); |
| 2100 | |
| 2101 | if (!s) |
| 2102 | goto nope; |
| 2103 | /* How to do it in subst? */ |
| 2104 | /* if ( (rx->reganch & ROPT_CHECK_ALL) |
| 2105 | && !PL_sawampersand |
| 2106 | && ((rx->reganch & ROPT_NOSCAN) |
| 2107 | || !((rx->reganch & RE_INTUIT_TAIL) |
| 2108 | && (r_flags & REXEC_SCREAM)))) |
| 2109 | goto yup; |
| 2110 | */ |
| 2111 | } |
| 2112 | |
| 2113 | /* only replace once? */ |
| 2114 | once = !(rpm->op_pmflags & PMf_GLOBAL); |
| 2115 | |
| 2116 | /* known replacement string? */ |
| 2117 | if (dstr) { |
| 2118 | /* replacement needing upgrading? */ |
| 2119 | if (DO_UTF8(TARG) && !doutf8) { |
| 2120 | nsv = sv_newmortal(); |
| 2121 | SvSetSV(nsv, dstr); |
| 2122 | if (PL_encoding) |
| 2123 | sv_recode_to_utf8(nsv, PL_encoding); |
| 2124 | else |
| 2125 | sv_utf8_upgrade(nsv); |
| 2126 | c = SvPV_const(nsv, clen); |
| 2127 | doutf8 = TRUE; |
| 2128 | } |
| 2129 | else { |
| 2130 | c = SvPV_const(dstr, clen); |
| 2131 | doutf8 = DO_UTF8(dstr); |
| 2132 | } |
| 2133 | } |
| 2134 | else { |
| 2135 | c = Nullch; |
| 2136 | doutf8 = FALSE; |
| 2137 | } |
| 2138 | |
| 2139 | /* can do inplace substitution? */ |
| 2140 | if (c |
| 2141 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 2142 | && !is_cow |
| 2143 | #endif |
| 2144 | && (I32)clen <= rx->minlen && (once || !(r_flags & REXEC_COPY_STR)) |
| 2145 | && !(rx->reganch & ROPT_LOOKBEHIND_SEEN) |
| 2146 | && (!doutf8 || SvUTF8(TARG))) { |
| 2147 | if (!CALLREGEXEC(aTHX_ rx, s, strend, orig, 0, TARG, NULL, |
| 2148 | r_flags | REXEC_CHECKED)) |
| 2149 | { |
| 2150 | SPAGAIN; |
| 2151 | PUSHs(&PL_sv_no); |
| 2152 | LEAVE_SCOPE(oldsave); |
| 2153 | RETURN; |
| 2154 | } |
| 2155 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 2156 | if (SvIsCOW(TARG)) { |
| 2157 | assert (!force_on_match); |
| 2158 | goto have_a_cow; |
| 2159 | } |
| 2160 | #endif |
| 2161 | if (force_on_match) { |
| 2162 | force_on_match = 0; |
| 2163 | s = SvPV_force(TARG, len); |
| 2164 | goto force_it; |
| 2165 | } |
| 2166 | d = s; |
| 2167 | PL_curpm = pm; |
| 2168 | SvSCREAM_off(TARG); /* disable possible screamer */ |
| 2169 | if (once) { |
| 2170 | rxtainted |= RX_MATCH_TAINTED(rx); |
| 2171 | m = orig + rx->startp[0]; |
| 2172 | d = orig + rx->endp[0]; |
| 2173 | s = orig; |
| 2174 | if (m - s > strend - d) { /* faster to shorten from end */ |
| 2175 | if (clen) { |
| 2176 | Copy(c, m, clen, char); |
| 2177 | m += clen; |
| 2178 | } |
| 2179 | i = strend - d; |
| 2180 | if (i > 0) { |
| 2181 | Move(d, m, i, char); |
| 2182 | m += i; |
| 2183 | } |
| 2184 | *m = '\0'; |
| 2185 | SvCUR_set(TARG, m - s); |
| 2186 | } |
| 2187 | else if ((i = m - s)) { /* faster from front */ |
| 2188 | d -= clen; |
| 2189 | m = d; |
| 2190 | sv_chop(TARG, d-i); |
| 2191 | s += i; |
| 2192 | while (i--) |
| 2193 | *--d = *--s; |
| 2194 | if (clen) |
| 2195 | Copy(c, m, clen, char); |
| 2196 | } |
| 2197 | else if (clen) { |
| 2198 | d -= clen; |
| 2199 | sv_chop(TARG, d); |
| 2200 | Copy(c, d, clen, char); |
| 2201 | } |
| 2202 | else { |
| 2203 | sv_chop(TARG, d); |
| 2204 | } |
| 2205 | TAINT_IF(rxtainted & 1); |
| 2206 | SPAGAIN; |
| 2207 | PUSHs(&PL_sv_yes); |
| 2208 | } |
| 2209 | else { |
| 2210 | do { |
| 2211 | if (iters++ > maxiters) |
| 2212 | DIE(aTHX_ "Substitution loop"); |
| 2213 | rxtainted |= RX_MATCH_TAINTED(rx); |
| 2214 | m = rx->startp[0] + orig; |
| 2215 | if ((i = m - s)) { |
| 2216 | if (s != d) |
| 2217 | Move(s, d, i, char); |
| 2218 | d += i; |
| 2219 | } |
| 2220 | if (clen) { |
| 2221 | Copy(c, d, clen, char); |
| 2222 | d += clen; |
| 2223 | } |
| 2224 | s = rx->endp[0] + orig; |
| 2225 | } while (CALLREGEXEC(aTHX_ rx, s, strend, orig, s == m, |
| 2226 | TARG, NULL, |
| 2227 | /* don't match same null twice */ |
| 2228 | REXEC_NOT_FIRST|REXEC_IGNOREPOS)); |
| 2229 | if (s != d) { |
| 2230 | i = strend - s; |
| 2231 | SvCUR_set(TARG, d - SvPVX_const(TARG) + i); |
| 2232 | Move(s, d, i+1, char); /* include the NUL */ |
| 2233 | } |
| 2234 | TAINT_IF(rxtainted & 1); |
| 2235 | SPAGAIN; |
| 2236 | PUSHs(sv_2mortal(newSViv((I32)iters))); |
| 2237 | } |
| 2238 | (void)SvPOK_only_UTF8(TARG); |
| 2239 | TAINT_IF(rxtainted); |
| 2240 | if (SvSMAGICAL(TARG)) { |
| 2241 | PUTBACK; |
| 2242 | mg_set(TARG); |
| 2243 | SPAGAIN; |
| 2244 | } |
| 2245 | SvTAINT(TARG); |
| 2246 | if (doutf8) |
| 2247 | SvUTF8_on(TARG); |
| 2248 | LEAVE_SCOPE(oldsave); |
| 2249 | RETURN; |
| 2250 | } |
| 2251 | |
| 2252 | if (CALLREGEXEC(aTHX_ rx, s, strend, orig, 0, TARG, NULL, |
| 2253 | r_flags | REXEC_CHECKED)) |
| 2254 | { |
| 2255 | if (force_on_match) { |
| 2256 | force_on_match = 0; |
| 2257 | s = SvPV_force(TARG, len); |
| 2258 | goto force_it; |
| 2259 | } |
| 2260 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 2261 | have_a_cow: |
| 2262 | #endif |
| 2263 | rxtainted |= RX_MATCH_TAINTED(rx); |
| 2264 | dstr = newSVpvn(m, s-m); |
| 2265 | if (DO_UTF8(TARG)) |
| 2266 | SvUTF8_on(dstr); |
| 2267 | PL_curpm = pm; |
| 2268 | if (!c) { |
| 2269 | register PERL_CONTEXT *cx; |
| 2270 | SPAGAIN; |
| 2271 | (void)ReREFCNT_inc(rx); |
| 2272 | PUSHSUBST(cx); |
| 2273 | RETURNOP(cPMOP->op_pmreplroot); |
| 2274 | } |
| 2275 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
| 2276 | do { |
| 2277 | if (iters++ > maxiters) |
| 2278 | DIE(aTHX_ "Substitution loop"); |
| 2279 | rxtainted |= RX_MATCH_TAINTED(rx); |
| 2280 | if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) { |
| 2281 | m = s; |
| 2282 | s = orig; |
| 2283 | orig = rx->subbeg; |
| 2284 | s = orig + (m - s); |
| 2285 | strend = s + (strend - m); |
| 2286 | } |
| 2287 | m = rx->startp[0] + orig; |
| 2288 | if (doutf8 && !SvUTF8(dstr)) |
| 2289 | sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv); |
| 2290 | else |
| 2291 | sv_catpvn(dstr, s, m-s); |
| 2292 | s = rx->endp[0] + orig; |
| 2293 | if (clen) |
| 2294 | sv_catpvn(dstr, c, clen); |
| 2295 | if (once) |
| 2296 | break; |
| 2297 | } while (CALLREGEXEC(aTHX_ rx, s, strend, orig, s == m, |
| 2298 | TARG, NULL, r_flags)); |
| 2299 | if (doutf8 && !DO_UTF8(TARG)) |
| 2300 | sv_catpvn_utf8_upgrade(dstr, s, strend - s, nsv); |
| 2301 | else |
| 2302 | sv_catpvn(dstr, s, strend - s); |
| 2303 | |
| 2304 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 2305 | /* The match may make the string COW. If so, brilliant, because that's |
| 2306 | just saved us one malloc, copy and free - the regexp has donated |
| 2307 | the old buffer, and we malloc an entirely new one, rather than the |
| 2308 | regexp malloc()ing a buffer and copying our original, only for |
| 2309 | us to throw it away here during the substitution. */ |
| 2310 | if (SvIsCOW(TARG)) { |
| 2311 | sv_force_normal_flags(TARG, SV_COW_DROP_PV); |
| 2312 | } else |
| 2313 | #endif |
| 2314 | { |
| 2315 | SvPV_free(TARG); |
| 2316 | } |
| 2317 | SvPV_set(TARG, SvPVX(dstr)); |
| 2318 | SvCUR_set(TARG, SvCUR(dstr)); |
| 2319 | SvLEN_set(TARG, SvLEN(dstr)); |
| 2320 | doutf8 |= DO_UTF8(dstr); |
| 2321 | SvPV_set(dstr, (char*)0); |
| 2322 | sv_free(dstr); |
| 2323 | |
| 2324 | TAINT_IF(rxtainted & 1); |
| 2325 | SPAGAIN; |
| 2326 | PUSHs(sv_2mortal(newSViv((I32)iters))); |
| 2327 | |
| 2328 | (void)SvPOK_only(TARG); |
| 2329 | if (doutf8) |
| 2330 | SvUTF8_on(TARG); |
| 2331 | TAINT_IF(rxtainted); |
| 2332 | SvSETMAGIC(TARG); |
| 2333 | SvTAINT(TARG); |
| 2334 | LEAVE_SCOPE(oldsave); |
| 2335 | RETURN; |
| 2336 | } |
| 2337 | goto ret_no; |
| 2338 | |
| 2339 | nope: |
| 2340 | ret_no: |
| 2341 | SPAGAIN; |
| 2342 | PUSHs(&PL_sv_no); |
| 2343 | LEAVE_SCOPE(oldsave); |
| 2344 | RETURN; |
| 2345 | } |
| 2346 | |
| 2347 | PP(pp_grepwhile) |
| 2348 | { |
| 2349 | dVAR; dSP; |
| 2350 | |
| 2351 | if (SvTRUEx(POPs)) |
| 2352 | PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr]; |
| 2353 | ++*PL_markstack_ptr; |
| 2354 | LEAVE; /* exit inner scope */ |
| 2355 | |
| 2356 | /* All done yet? */ |
| 2357 | if (PL_stack_base + *PL_markstack_ptr > SP) { |
| 2358 | I32 items; |
| 2359 | const I32 gimme = GIMME_V; |
| 2360 | |
| 2361 | LEAVE; /* exit outer scope */ |
| 2362 | (void)POPMARK; /* pop src */ |
| 2363 | items = --*PL_markstack_ptr - PL_markstack_ptr[-1]; |
| 2364 | (void)POPMARK; /* pop dst */ |
| 2365 | SP = PL_stack_base + POPMARK; /* pop original mark */ |
| 2366 | if (gimme == G_SCALAR) { |
| 2367 | if (PL_op->op_private & OPpGREP_LEX) { |
| 2368 | SV* const sv = sv_newmortal(); |
| 2369 | sv_setiv(sv, items); |
| 2370 | PUSHs(sv); |
| 2371 | } |
| 2372 | else { |
| 2373 | dTARGET; |
| 2374 | XPUSHi(items); |
| 2375 | } |
| 2376 | } |
| 2377 | else if (gimme == G_ARRAY) |
| 2378 | SP += items; |
| 2379 | RETURN; |
| 2380 | } |
| 2381 | else { |
| 2382 | SV *src; |
| 2383 | |
| 2384 | ENTER; /* enter inner scope */ |
| 2385 | SAVEVPTR(PL_curpm); |
| 2386 | |
| 2387 | src = PL_stack_base[*PL_markstack_ptr]; |
| 2388 | SvTEMP_off(src); |
| 2389 | if (PL_op->op_private & OPpGREP_LEX) |
| 2390 | PAD_SVl(PL_op->op_targ) = src; |
| 2391 | else |
| 2392 | DEFSV = src; |
| 2393 | |
| 2394 | RETURNOP(cLOGOP->op_other); |
| 2395 | } |
| 2396 | } |
| 2397 | |
| 2398 | PP(pp_leavesub) |
| 2399 | { |
| 2400 | dVAR; dSP; |
| 2401 | SV **mark; |
| 2402 | SV **newsp; |
| 2403 | PMOP *newpm; |
| 2404 | I32 gimme; |
| 2405 | register PERL_CONTEXT *cx; |
| 2406 | SV *sv; |
| 2407 | |
| 2408 | if (CxMULTICALL(&cxstack[cxstack_ix])) |
| 2409 | return 0; |
| 2410 | |
| 2411 | POPBLOCK(cx,newpm); |
| 2412 | cxstack_ix++; /* temporarily protect top context */ |
| 2413 | |
| 2414 | TAINT_NOT; |
| 2415 | if (gimme == G_SCALAR) { |
| 2416 | MARK = newsp + 1; |
| 2417 | if (MARK <= SP) { |
| 2418 | if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) { |
| 2419 | if (SvTEMP(TOPs)) { |
| 2420 | *MARK = SvREFCNT_inc(TOPs); |
| 2421 | FREETMPS; |
| 2422 | sv_2mortal(*MARK); |
| 2423 | } |
| 2424 | else { |
| 2425 | sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */ |
| 2426 | FREETMPS; |
| 2427 | *MARK = sv_mortalcopy(sv); |
| 2428 | SvREFCNT_dec(sv); |
| 2429 | } |
| 2430 | } |
| 2431 | else |
| 2432 | *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs); |
| 2433 | } |
| 2434 | else { |
| 2435 | MEXTEND(MARK, 0); |
| 2436 | *MARK = &PL_sv_undef; |
| 2437 | } |
| 2438 | SP = MARK; |
| 2439 | } |
| 2440 | else if (gimme == G_ARRAY) { |
| 2441 | for (MARK = newsp + 1; MARK <= SP; MARK++) { |
| 2442 | if (!SvTEMP(*MARK)) { |
| 2443 | *MARK = sv_mortalcopy(*MARK); |
| 2444 | TAINT_NOT; /* Each item is independent */ |
| 2445 | } |
| 2446 | } |
| 2447 | } |
| 2448 | PUTBACK; |
| 2449 | |
| 2450 | LEAVE; |
| 2451 | cxstack_ix--; |
| 2452 | POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */ |
| 2453 | PL_curpm = newpm; /* ... and pop $1 et al */ |
| 2454 | |
| 2455 | LEAVESUB(sv); |
| 2456 | return cx->blk_sub.retop; |
| 2457 | } |
| 2458 | |
| 2459 | /* This duplicates the above code because the above code must not |
| 2460 | * get any slower by more conditions */ |
| 2461 | PP(pp_leavesublv) |
| 2462 | { |
| 2463 | dVAR; dSP; |
| 2464 | SV **mark; |
| 2465 | SV **newsp; |
| 2466 | PMOP *newpm; |
| 2467 | I32 gimme; |
| 2468 | register PERL_CONTEXT *cx; |
| 2469 | SV *sv; |
| 2470 | |
| 2471 | if (CxMULTICALL(&cxstack[cxstack_ix])) |
| 2472 | return 0; |
| 2473 | |
| 2474 | POPBLOCK(cx,newpm); |
| 2475 | cxstack_ix++; /* temporarily protect top context */ |
| 2476 | |
| 2477 | TAINT_NOT; |
| 2478 | |
| 2479 | if (cx->blk_sub.lval & OPpENTERSUB_INARGS) { |
| 2480 | /* We are an argument to a function or grep(). |
| 2481 | * This kind of lvalueness was legal before lvalue |
| 2482 | * subroutines too, so be backward compatible: |
| 2483 | * cannot report errors. */ |
| 2484 | |
| 2485 | /* Scalar context *is* possible, on the LHS of -> only, |
| 2486 | * as in f()->meth(). But this is not an lvalue. */ |
| 2487 | if (gimme == G_SCALAR) |
| 2488 | goto temporise; |
| 2489 | if (gimme == G_ARRAY) { |
| 2490 | if (!CvLVALUE(cx->blk_sub.cv)) |
| 2491 | goto temporise_array; |
| 2492 | EXTEND_MORTAL(SP - newsp); |
| 2493 | for (mark = newsp + 1; mark <= SP; mark++) { |
| 2494 | if (SvTEMP(*mark)) |
| 2495 | /* empty */ ; |
| 2496 | else if (SvFLAGS(*mark) & (SVs_PADTMP | SVf_READONLY)) |
| 2497 | *mark = sv_mortalcopy(*mark); |
| 2498 | else { |
| 2499 | /* Can be a localized value subject to deletion. */ |
| 2500 | PL_tmps_stack[++PL_tmps_ix] = *mark; |
| 2501 | (void)SvREFCNT_inc(*mark); |
| 2502 | } |
| 2503 | } |
| 2504 | } |
| 2505 | } |
| 2506 | else if (cx->blk_sub.lval) { /* Leave it as it is if we can. */ |
| 2507 | /* Here we go for robustness, not for speed, so we change all |
| 2508 | * the refcounts so the caller gets a live guy. Cannot set |
| 2509 | * TEMP, so sv_2mortal is out of question. */ |
| 2510 | if (!CvLVALUE(cx->blk_sub.cv)) { |
| 2511 | LEAVE; |
| 2512 | cxstack_ix--; |
| 2513 | POPSUB(cx,sv); |
| 2514 | PL_curpm = newpm; |
| 2515 | LEAVESUB(sv); |
| 2516 | DIE(aTHX_ "Can't modify non-lvalue subroutine call"); |
| 2517 | } |
| 2518 | if (gimme == G_SCALAR) { |
| 2519 | MARK = newsp + 1; |
| 2520 | EXTEND_MORTAL(1); |
| 2521 | if (MARK == SP) { |
| 2522 | /* Temporaries are bad unless they happen to be elements |
| 2523 | * of a tied hash or array */ |
| 2524 | if (SvFLAGS(TOPs) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY) && |
| 2525 | !(SvRMAGICAL(TOPs) && mg_find(TOPs, PERL_MAGIC_tiedelem))) { |
| 2526 | LEAVE; |
| 2527 | cxstack_ix--; |
| 2528 | POPSUB(cx,sv); |
| 2529 | PL_curpm = newpm; |
| 2530 | LEAVESUB(sv); |
| 2531 | DIE(aTHX_ "Can't return %s from lvalue subroutine", |
| 2532 | SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef" |
| 2533 | : "a readonly value" : "a temporary"); |
| 2534 | } |
| 2535 | else { /* Can be a localized value |
| 2536 | * subject to deletion. */ |
| 2537 | PL_tmps_stack[++PL_tmps_ix] = *mark; |
| 2538 | (void)SvREFCNT_inc(*mark); |
| 2539 | } |
| 2540 | } |
| 2541 | else { /* Should not happen? */ |
| 2542 | LEAVE; |
| 2543 | cxstack_ix--; |
| 2544 | POPSUB(cx,sv); |
| 2545 | PL_curpm = newpm; |
| 2546 | LEAVESUB(sv); |
| 2547 | DIE(aTHX_ "%s returned from lvalue subroutine in scalar context", |
| 2548 | (MARK > SP ? "Empty array" : "Array")); |
| 2549 | } |
| 2550 | SP = MARK; |
| 2551 | } |
| 2552 | else if (gimme == G_ARRAY) { |
| 2553 | EXTEND_MORTAL(SP - newsp); |
| 2554 | for (mark = newsp + 1; mark <= SP; mark++) { |
| 2555 | if (*mark != &PL_sv_undef |
| 2556 | && SvFLAGS(*mark) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) { |
| 2557 | /* Might be flattened array after $#array = */ |
| 2558 | PUTBACK; |
| 2559 | LEAVE; |
| 2560 | cxstack_ix--; |
| 2561 | POPSUB(cx,sv); |
| 2562 | PL_curpm = newpm; |
| 2563 | LEAVESUB(sv); |
| 2564 | DIE(aTHX_ "Can't return a %s from lvalue subroutine", |
| 2565 | SvREADONLY(TOPs) ? "readonly value" : "temporary"); |
| 2566 | } |
| 2567 | else { |
| 2568 | /* Can be a localized value subject to deletion. */ |
| 2569 | PL_tmps_stack[++PL_tmps_ix] = *mark; |
| 2570 | (void)SvREFCNT_inc(*mark); |
| 2571 | } |
| 2572 | } |
| 2573 | } |
| 2574 | } |
| 2575 | else { |
| 2576 | if (gimme == G_SCALAR) { |
| 2577 | temporise: |
| 2578 | MARK = newsp + 1; |
| 2579 | if (MARK <= SP) { |
| 2580 | if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) { |
| 2581 | if (SvTEMP(TOPs)) { |
| 2582 | *MARK = SvREFCNT_inc(TOPs); |
| 2583 | FREETMPS; |
| 2584 | sv_2mortal(*MARK); |
| 2585 | } |
| 2586 | else { |
| 2587 | sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */ |
| 2588 | FREETMPS; |
| 2589 | *MARK = sv_mortalcopy(sv); |
| 2590 | SvREFCNT_dec(sv); |
| 2591 | } |
| 2592 | } |
| 2593 | else |
| 2594 | *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs); |
| 2595 | } |
| 2596 | else { |
| 2597 | MEXTEND(MARK, 0); |
| 2598 | *MARK = &PL_sv_undef; |
| 2599 | } |
| 2600 | SP = MARK; |
| 2601 | } |
| 2602 | else if (gimme == G_ARRAY) { |
| 2603 | temporise_array: |
| 2604 | for (MARK = newsp + 1; MARK <= SP; MARK++) { |
| 2605 | if (!SvTEMP(*MARK)) { |
| 2606 | *MARK = sv_mortalcopy(*MARK); |
| 2607 | TAINT_NOT; /* Each item is independent */ |
| 2608 | } |
| 2609 | } |
| 2610 | } |
| 2611 | } |
| 2612 | PUTBACK; |
| 2613 | |
| 2614 | LEAVE; |
| 2615 | cxstack_ix--; |
| 2616 | POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */ |
| 2617 | PL_curpm = newpm; /* ... and pop $1 et al */ |
| 2618 | |
| 2619 | LEAVESUB(sv); |
| 2620 | return cx->blk_sub.retop; |
| 2621 | } |
| 2622 | |
| 2623 | |
| 2624 | STATIC CV * |
| 2625 | S_get_db_sub(pTHX_ SV **svp, CV *cv) |
| 2626 | { |
| 2627 | SV * const dbsv = GvSVn(PL_DBsub); |
| 2628 | |
| 2629 | save_item(dbsv); |
| 2630 | if (!PERLDB_SUB_NN) { |
| 2631 | GV *gv = CvGV(cv); |
| 2632 | |
| 2633 | if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED)) |
| 2634 | || strEQ(GvNAME(gv), "END") |
| 2635 | || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */ |
| 2636 | !( (SvTYPE(*svp) == SVt_PVGV) && (GvCV((GV*)*svp) == cv) |
| 2637 | && (gv = (GV*)*svp) ))) { |
| 2638 | /* Use GV from the stack as a fallback. */ |
| 2639 | /* GV is potentially non-unique, or contain different CV. */ |
| 2640 | SV * const tmp = newRV((SV*)cv); |
| 2641 | sv_setsv(dbsv, tmp); |
| 2642 | SvREFCNT_dec(tmp); |
| 2643 | } |
| 2644 | else { |
| 2645 | gv_efullname3(dbsv, gv, Nullch); |
| 2646 | } |
| 2647 | } |
| 2648 | else { |
| 2649 | const int type = SvTYPE(dbsv); |
| 2650 | if (type < SVt_PVIV && type != SVt_IV) |
| 2651 | sv_upgrade(dbsv, SVt_PVIV); |
| 2652 | (void)SvIOK_on(dbsv); |
| 2653 | SvIV_set(dbsv, PTR2IV(cv)); /* Do it the quickest way */ |
| 2654 | } |
| 2655 | |
| 2656 | if (CvXSUB(cv)) |
| 2657 | PL_curcopdb = PL_curcop; |
| 2658 | cv = GvCV(PL_DBsub); |
| 2659 | return cv; |
| 2660 | } |
| 2661 | |
| 2662 | PP(pp_entersub) |
| 2663 | { |
| 2664 | dVAR; dSP; dPOPss; |
| 2665 | GV *gv; |
| 2666 | register CV *cv; |
| 2667 | register PERL_CONTEXT *cx; |
| 2668 | I32 gimme; |
| 2669 | const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0; |
| 2670 | |
| 2671 | if (!sv) |
| 2672 | DIE(aTHX_ "Not a CODE reference"); |
| 2673 | switch (SvTYPE(sv)) { |
| 2674 | /* This is overwhelming the most common case: */ |
| 2675 | case SVt_PVGV: |
| 2676 | if (!(cv = GvCVu((GV*)sv))) { |
| 2677 | HV *stash; |
| 2678 | cv = sv_2cv(sv, &stash, &gv, 0); |
| 2679 | } |
| 2680 | if (!cv) { |
| 2681 | ENTER; |
| 2682 | SAVETMPS; |
| 2683 | goto try_autoload; |
| 2684 | } |
| 2685 | break; |
| 2686 | default: |
| 2687 | if (!SvROK(sv)) { |
| 2688 | const char *sym; |
| 2689 | if (sv == &PL_sv_yes) { /* unfound import, ignore */ |
| 2690 | if (hasargs) |
| 2691 | SP = PL_stack_base + POPMARK; |
| 2692 | RETURN; |
| 2693 | } |
| 2694 | if (SvGMAGICAL(sv)) { |
| 2695 | mg_get(sv); |
| 2696 | if (SvROK(sv)) |
| 2697 | goto got_rv; |
| 2698 | sym = SvPOKp(sv) ? SvPVX_const(sv) : Nullch; |
| 2699 | } |
| 2700 | else { |
| 2701 | sym = SvPV_nolen_const(sv); |
| 2702 | } |
| 2703 | if (!sym) |
| 2704 | DIE(aTHX_ PL_no_usym, "a subroutine"); |
| 2705 | if (PL_op->op_private & HINT_STRICT_REFS) |
| 2706 | DIE(aTHX_ PL_no_symref, sym, "a subroutine"); |
| 2707 | cv = get_cv(sym, TRUE); |
| 2708 | break; |
| 2709 | } |
| 2710 | got_rv: |
| 2711 | { |
| 2712 | SV * const * sp = &sv; /* Used in tryAMAGICunDEREF macro. */ |
| 2713 | tryAMAGICunDEREF(to_cv); |
| 2714 | } |
| 2715 | cv = (CV*)SvRV(sv); |
| 2716 | if (SvTYPE(cv) == SVt_PVCV) |
| 2717 | break; |
| 2718 | /* FALL THROUGH */ |
| 2719 | case SVt_PVHV: |
| 2720 | case SVt_PVAV: |
| 2721 | DIE(aTHX_ "Not a CODE reference"); |
| 2722 | /* This is the second most common case: */ |
| 2723 | case SVt_PVCV: |
| 2724 | cv = (CV*)sv; |
| 2725 | break; |
| 2726 | } |
| 2727 | |
| 2728 | ENTER; |
| 2729 | SAVETMPS; |
| 2730 | |
| 2731 | retry: |
| 2732 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
| 2733 | GV* autogv; |
| 2734 | SV* sub_name; |
| 2735 | |
| 2736 | /* anonymous or undef'd function leaves us no recourse */ |
| 2737 | if (CvANON(cv) || !(gv = CvGV(cv))) |
| 2738 | DIE(aTHX_ "Undefined subroutine called"); |
| 2739 | |
| 2740 | /* autoloaded stub? */ |
| 2741 | if (cv != GvCV(gv)) { |
| 2742 | cv = GvCV(gv); |
| 2743 | } |
| 2744 | /* should call AUTOLOAD now? */ |
| 2745 | else { |
| 2746 | try_autoload: |
| 2747 | if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), |
| 2748 | FALSE))) |
| 2749 | { |
| 2750 | cv = GvCV(autogv); |
| 2751 | } |
| 2752 | /* sorry */ |
| 2753 | else { |
| 2754 | sub_name = sv_newmortal(); |
| 2755 | gv_efullname3(sub_name, gv, Nullch); |
| 2756 | DIE(aTHX_ "Undefined subroutine &%"SVf" called", sub_name); |
| 2757 | } |
| 2758 | } |
| 2759 | if (!cv) |
| 2760 | DIE(aTHX_ "Not a CODE reference"); |
| 2761 | goto retry; |
| 2762 | } |
| 2763 | |
| 2764 | gimme = GIMME_V; |
| 2765 | if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) { |
| 2766 | if (CvASSERTION(cv) && PL_DBassertion) |
| 2767 | sv_setiv(PL_DBassertion, 1); |
| 2768 | |
| 2769 | cv = get_db_sub(&sv, cv); |
| 2770 | if (!cv || (!CvXSUB(cv) && !CvSTART(cv))) |
| 2771 | DIE(aTHX_ "No DB::sub routine defined"); |
| 2772 | } |
| 2773 | |
| 2774 | if (!(CvXSUB(cv))) { |
| 2775 | /* This path taken at least 75% of the time */ |
| 2776 | dMARK; |
| 2777 | register I32 items = SP - MARK; |
| 2778 | AV* const padlist = CvPADLIST(cv); |
| 2779 | PUSHBLOCK(cx, CXt_SUB, MARK); |
| 2780 | PUSHSUB(cx); |
| 2781 | cx->blk_sub.retop = PL_op->op_next; |
| 2782 | CvDEPTH(cv)++; |
| 2783 | /* XXX This would be a natural place to set C<PL_compcv = cv> so |
| 2784 | * that eval'' ops within this sub know the correct lexical space. |
| 2785 | * Owing the speed considerations, we choose instead to search for |
| 2786 | * the cv using find_runcv() when calling doeval(). |
| 2787 | */ |
| 2788 | if (CvDEPTH(cv) >= 2) { |
| 2789 | PERL_STACK_OVERFLOW_CHECK(); |
| 2790 | pad_push(padlist, CvDEPTH(cv)); |
| 2791 | } |
| 2792 | SAVECOMPPAD(); |
| 2793 | PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); |
| 2794 | if (hasargs) |
| 2795 | { |
| 2796 | AV* const av = (AV*)PAD_SVl(0); |
| 2797 | if (AvREAL(av)) { |
| 2798 | /* @_ is normally not REAL--this should only ever |
| 2799 | * happen when DB::sub() calls things that modify @_ */ |
| 2800 | av_clear(av); |
| 2801 | AvREAL_off(av); |
| 2802 | AvREIFY_on(av); |
| 2803 | } |
| 2804 | cx->blk_sub.savearray = GvAV(PL_defgv); |
| 2805 | GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av); |
| 2806 | CX_CURPAD_SAVE(cx->blk_sub); |
| 2807 | cx->blk_sub.argarray = av; |
| 2808 | ++MARK; |
| 2809 | |
| 2810 | if (items > AvMAX(av) + 1) { |
| 2811 | SV **ary = AvALLOC(av); |
| 2812 | if (AvARRAY(av) != ary) { |
| 2813 | AvMAX(av) += AvARRAY(av) - AvALLOC(av); |
| 2814 | SvPV_set(av, (char*)ary); |
| 2815 | } |
| 2816 | if (items > AvMAX(av) + 1) { |
| 2817 | AvMAX(av) = items - 1; |
| 2818 | Renew(ary,items,SV*); |
| 2819 | AvALLOC(av) = ary; |
| 2820 | SvPV_set(av, (char*)ary); |
| 2821 | } |
| 2822 | } |
| 2823 | Copy(MARK,AvARRAY(av),items,SV*); |
| 2824 | AvFILLp(av) = items - 1; |
| 2825 | |
| 2826 | while (items--) { |
| 2827 | if (*MARK) |
| 2828 | SvTEMP_off(*MARK); |
| 2829 | MARK++; |
| 2830 | } |
| 2831 | } |
| 2832 | /* warning must come *after* we fully set up the context |
| 2833 | * stuff so that __WARN__ handlers can safely dounwind() |
| 2834 | * if they want to |
| 2835 | */ |
| 2836 | if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION) |
| 2837 | && !(PERLDB_SUB && cv == GvCV(PL_DBsub))) |
| 2838 | sub_crush_depth(cv); |
| 2839 | #if 0 |
| 2840 | DEBUG_S(PerlIO_printf(Perl_debug_log, |
| 2841 | "%p entersub returning %p\n", thr, CvSTART(cv))); |
| 2842 | #endif |
| 2843 | RETURNOP(CvSTART(cv)); |
| 2844 | } |
| 2845 | else { |
| 2846 | #ifdef PERL_XSUB_OLDSTYLE |
| 2847 | if (CvOLDSTYLE(cv)) { |
| 2848 | I32 (*fp3)(int,int,int); |
| 2849 | dMARK; |
| 2850 | register I32 items = SP - MARK; |
| 2851 | /* We dont worry to copy from @_. */ |
| 2852 | while (SP > mark) { |
| 2853 | SP[1] = SP[0]; |
| 2854 | SP--; |
| 2855 | } |
| 2856 | PL_stack_sp = mark + 1; |
| 2857 | fp3 = (I32(*)(int,int,int))CvXSUB(cv); |
| 2858 | items = (*fp3)(CvXSUBANY(cv).any_i32, |
| 2859 | MARK - PL_stack_base + 1, |
| 2860 | items); |
| 2861 | PL_stack_sp = PL_stack_base + items; |
| 2862 | } |
| 2863 | else |
| 2864 | #endif /* PERL_XSUB_OLDSTYLE */ |
| 2865 | { |
| 2866 | I32 markix = TOPMARK; |
| 2867 | |
| 2868 | PUTBACK; |
| 2869 | |
| 2870 | if (!hasargs) { |
| 2871 | /* Need to copy @_ to stack. Alternative may be to |
| 2872 | * switch stack to @_, and copy return values |
| 2873 | * back. This would allow popping @_ in XSUB, e.g.. XXXX */ |
| 2874 | AV * const av = GvAV(PL_defgv); |
| 2875 | const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */ |
| 2876 | |
| 2877 | if (items) { |
| 2878 | /* Mark is at the end of the stack. */ |
| 2879 | EXTEND(SP, items); |
| 2880 | Copy(AvARRAY(av), SP + 1, items, SV*); |
| 2881 | SP += items; |
| 2882 | PUTBACK ; |
| 2883 | } |
| 2884 | } |
| 2885 | /* We assume first XSUB in &DB::sub is the called one. */ |
| 2886 | if (PL_curcopdb) { |
| 2887 | SAVEVPTR(PL_curcop); |
| 2888 | PL_curcop = PL_curcopdb; |
| 2889 | PL_curcopdb = NULL; |
| 2890 | } |
| 2891 | /* Do we need to open block here? XXXX */ |
| 2892 | (void)(*CvXSUB(cv))(aTHX_ cv); |
| 2893 | |
| 2894 | /* Enforce some sanity in scalar context. */ |
| 2895 | if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) { |
| 2896 | if (markix > PL_stack_sp - PL_stack_base) |
| 2897 | *(PL_stack_base + markix) = &PL_sv_undef; |
| 2898 | else |
| 2899 | *(PL_stack_base + markix) = *PL_stack_sp; |
| 2900 | PL_stack_sp = PL_stack_base + markix; |
| 2901 | } |
| 2902 | } |
| 2903 | LEAVE; |
| 2904 | return NORMAL; |
| 2905 | } |
| 2906 | } |
| 2907 | |
| 2908 | void |
| 2909 | Perl_sub_crush_depth(pTHX_ CV *cv) |
| 2910 | { |
| 2911 | if (CvANON(cv)) |
| 2912 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine"); |
| 2913 | else { |
| 2914 | SV* const tmpstr = sv_newmortal(); |
| 2915 | gv_efullname3(tmpstr, CvGV(cv), Nullch); |
| 2916 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"", |
| 2917 | tmpstr); |
| 2918 | } |
| 2919 | } |
| 2920 | |
| 2921 | PP(pp_aelem) |
| 2922 | { |
| 2923 | dSP; |
| 2924 | SV** svp; |
| 2925 | SV* const elemsv = POPs; |
| 2926 | IV elem = SvIV(elemsv); |
| 2927 | AV* const av = (AV*)POPs; |
| 2928 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
| 2929 | const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av)); |
| 2930 | SV *sv; |
| 2931 | |
| 2932 | if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC)) |
| 2933 | Perl_warner(aTHX_ packWARN(WARN_MISC), "Use of reference \"%"SVf"\" as array index", elemsv); |
| 2934 | if (elem > 0) |
| 2935 | elem -= PL_curcop->cop_arybase; |
| 2936 | if (SvTYPE(av) != SVt_PVAV) |
| 2937 | RETPUSHUNDEF; |
| 2938 | svp = av_fetch(av, elem, lval && !defer); |
| 2939 | if (lval) { |
| 2940 | #ifdef PERL_MALLOC_WRAP |
| 2941 | if (SvUOK(elemsv)) { |
| 2942 | const UV uv = SvUV(elemsv); |
| 2943 | elem = uv > IV_MAX ? IV_MAX : uv; |
| 2944 | } |
| 2945 | else if (SvNOK(elemsv)) |
| 2946 | elem = (IV)SvNV(elemsv); |
| 2947 | if (elem > 0) { |
| 2948 | static const char oom_array_extend[] = |
| 2949 | "Out of memory during array extend"; /* Duplicated in av.c */ |
| 2950 | MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend); |
| 2951 | } |
| 2952 | #endif |
| 2953 | if (!svp || *svp == &PL_sv_undef) { |
| 2954 | SV* lv; |
| 2955 | if (!defer) |
| 2956 | DIE(aTHX_ PL_no_aelem, elem); |
| 2957 | lv = sv_newmortal(); |
| 2958 | sv_upgrade(lv, SVt_PVLV); |
| 2959 | LvTYPE(lv) = 'y'; |
| 2960 | sv_magic(lv, Nullsv, PERL_MAGIC_defelem, Nullch, 0); |
| 2961 | LvTARG(lv) = SvREFCNT_inc(av); |
| 2962 | LvTARGOFF(lv) = elem; |
| 2963 | LvTARGLEN(lv) = 1; |
| 2964 | PUSHs(lv); |
| 2965 | RETURN; |
| 2966 | } |
| 2967 | if (PL_op->op_private & OPpLVAL_INTRO) |
| 2968 | save_aelem(av, elem, svp); |
| 2969 | else if (PL_op->op_private & OPpDEREF) |
| 2970 | vivify_ref(*svp, PL_op->op_private & OPpDEREF); |
| 2971 | } |
| 2972 | sv = (svp ? *svp : &PL_sv_undef); |
| 2973 | if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
| 2974 | sv = sv_mortalcopy(sv); |
| 2975 | PUSHs(sv); |
| 2976 | RETURN; |
| 2977 | } |
| 2978 | |
| 2979 | void |
| 2980 | Perl_vivify_ref(pTHX_ SV *sv, U32 to_what) |
| 2981 | { |
| 2982 | SvGETMAGIC(sv); |
| 2983 | if (!SvOK(sv)) { |
| 2984 | if (SvREADONLY(sv)) |
| 2985 | Perl_croak(aTHX_ PL_no_modify); |
| 2986 | if (SvTYPE(sv) < SVt_RV) |
| 2987 | sv_upgrade(sv, SVt_RV); |
| 2988 | else if (SvTYPE(sv) >= SVt_PV) { |
| 2989 | SvPV_free(sv); |
| 2990 | SvLEN_set(sv, 0); |
| 2991 | SvCUR_set(sv, 0); |
| 2992 | } |
| 2993 | switch (to_what) { |
| 2994 | case OPpDEREF_SV: |
| 2995 | SvRV_set(sv, NEWSV(355,0)); |
| 2996 | break; |
| 2997 | case OPpDEREF_AV: |
| 2998 | SvRV_set(sv, (SV*)newAV()); |
| 2999 | break; |
| 3000 | case OPpDEREF_HV: |
| 3001 | SvRV_set(sv, (SV*)newHV()); |
| 3002 | break; |
| 3003 | } |
| 3004 | SvROK_on(sv); |
| 3005 | SvSETMAGIC(sv); |
| 3006 | } |
| 3007 | } |
| 3008 | |
| 3009 | PP(pp_method) |
| 3010 | { |
| 3011 | dSP; |
| 3012 | SV* const sv = TOPs; |
| 3013 | |
| 3014 | if (SvROK(sv)) { |
| 3015 | SV* const rsv = SvRV(sv); |
| 3016 | if (SvTYPE(rsv) == SVt_PVCV) { |
| 3017 | SETs(rsv); |
| 3018 | RETURN; |
| 3019 | } |
| 3020 | } |
| 3021 | |
| 3022 | SETs(method_common(sv, Null(U32*))); |
| 3023 | RETURN; |
| 3024 | } |
| 3025 | |
| 3026 | PP(pp_method_named) |
| 3027 | { |
| 3028 | dSP; |
| 3029 | SV* const sv = cSVOP_sv; |
| 3030 | U32 hash = SvSHARED_HASH(sv); |
| 3031 | |
| 3032 | XPUSHs(method_common(sv, &hash)); |
| 3033 | RETURN; |
| 3034 | } |
| 3035 | |
| 3036 | STATIC SV * |
| 3037 | S_method_common(pTHX_ SV* meth, U32* hashp) |
| 3038 | { |
| 3039 | SV* ob; |
| 3040 | GV* gv; |
| 3041 | HV* stash; |
| 3042 | STRLEN namelen; |
| 3043 | const char* packname = Nullch; |
| 3044 | SV *packsv = Nullsv; |
| 3045 | STRLEN packlen; |
| 3046 | const char * const name = SvPV_const(meth, namelen); |
| 3047 | SV * const sv = *(PL_stack_base + TOPMARK + 1); |
| 3048 | |
| 3049 | if (!sv) |
| 3050 | Perl_croak(aTHX_ "Can't call method \"%s\" on an undefined value", name); |
| 3051 | |
| 3052 | SvGETMAGIC(sv); |
| 3053 | if (SvROK(sv)) |
| 3054 | ob = (SV*)SvRV(sv); |
| 3055 | else { |
| 3056 | GV* iogv; |
| 3057 | |
| 3058 | /* this isn't a reference */ |
| 3059 | if(SvOK(sv) && (packname = SvPV_const(sv, packlen))) { |
| 3060 | const HE* const he = hv_fetch_ent(PL_stashcache, sv, 0, 0); |
| 3061 | if (he) { |
| 3062 | stash = INT2PTR(HV*,SvIV(HeVAL(he))); |
| 3063 | goto fetch; |
| 3064 | } |
| 3065 | } |
| 3066 | |
| 3067 | if (!SvOK(sv) || |
| 3068 | !(packname) || |
| 3069 | !(iogv = gv_fetchsv(sv, 0, SVt_PVIO)) || |
| 3070 | !(ob=(SV*)GvIO(iogv))) |
| 3071 | { |
| 3072 | /* this isn't the name of a filehandle either */ |
| 3073 | if (!packname || |
| 3074 | ((UTF8_IS_START(*packname) && DO_UTF8(sv)) |
| 3075 | ? !isIDFIRST_utf8((U8*)packname) |
| 3076 | : !isIDFIRST(*packname) |
| 3077 | )) |
| 3078 | { |
| 3079 | Perl_croak(aTHX_ "Can't call method \"%s\" %s", name, |
| 3080 | SvOK(sv) ? "without a package or object reference" |
| 3081 | : "on an undefined value"); |
| 3082 | } |
| 3083 | /* assume it's a package name */ |
| 3084 | stash = gv_stashpvn(packname, packlen, FALSE); |
| 3085 | if (!stash) |
| 3086 | packsv = sv; |
| 3087 | else { |
| 3088 | SV* ref = newSViv(PTR2IV(stash)); |
| 3089 | hv_store(PL_stashcache, packname, packlen, ref, 0); |
| 3090 | } |
| 3091 | goto fetch; |
| 3092 | } |
| 3093 | /* it _is_ a filehandle name -- replace with a reference */ |
| 3094 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv)); |
| 3095 | } |
| 3096 | |
| 3097 | /* if we got here, ob should be a reference or a glob */ |
| 3098 | if (!ob || !(SvOBJECT(ob) |
| 3099 | || (SvTYPE(ob) == SVt_PVGV && (ob = (SV*)GvIO((GV*)ob)) |
| 3100 | && SvOBJECT(ob)))) |
| 3101 | { |
| 3102 | Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference", |
| 3103 | name); |
| 3104 | } |
| 3105 | |
| 3106 | stash = SvSTASH(ob); |
| 3107 | |
| 3108 | fetch: |
| 3109 | /* NOTE: stash may be null, hope hv_fetch_ent and |
| 3110 | gv_fetchmethod can cope (it seems they can) */ |
| 3111 | |
| 3112 | /* shortcut for simple names */ |
| 3113 | if (hashp) { |
| 3114 | const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp); |
| 3115 | if (he) { |
| 3116 | gv = (GV*)HeVAL(he); |
| 3117 | if (isGV(gv) && GvCV(gv) && |
| 3118 | (!GvCVGEN(gv) || GvCVGEN(gv) == PL_sub_generation)) |
| 3119 | return (SV*)GvCV(gv); |
| 3120 | } |
| 3121 | } |
| 3122 | |
| 3123 | gv = gv_fetchmethod(stash ? stash : (HV*)packsv, name); |
| 3124 | |
| 3125 | if (!gv) { |
| 3126 | /* This code tries to figure out just what went wrong with |
| 3127 | gv_fetchmethod. It therefore needs to duplicate a lot of |
| 3128 | the internals of that function. We can't move it inside |
| 3129 | Perl_gv_fetchmethod_autoload(), however, since that would |
| 3130 | cause UNIVERSAL->can("NoSuchPackage::foo") to croak, and we |
| 3131 | don't want that. |
| 3132 | */ |
| 3133 | const char* leaf = name; |
| 3134 | const char* sep = Nullch; |
| 3135 | const char* p; |
| 3136 | |
| 3137 | for (p = name; *p; p++) { |
| 3138 | if (*p == '\'') |
| 3139 | sep = p, leaf = p + 1; |
| 3140 | else if (*p == ':' && *(p + 1) == ':') |
| 3141 | sep = p, leaf = p + 2; |
| 3142 | } |
| 3143 | if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) { |
| 3144 | /* the method name is unqualified or starts with SUPER:: */ |
| 3145 | bool need_strlen = 1; |
| 3146 | if (sep) { |
| 3147 | packname = CopSTASHPV(PL_curcop); |
| 3148 | } |
| 3149 | else if (stash) { |
| 3150 | HEK * const packhek = HvNAME_HEK(stash); |
| 3151 | if (packhek) { |
| 3152 | packname = HEK_KEY(packhek); |
| 3153 | packlen = HEK_LEN(packhek); |
| 3154 | need_strlen = 0; |
| 3155 | } else { |
| 3156 | goto croak; |
| 3157 | } |
| 3158 | } |
| 3159 | |
| 3160 | if (!packname) { |
| 3161 | croak: |
| 3162 | Perl_croak(aTHX_ |
| 3163 | "Can't use anonymous symbol table for method lookup"); |
| 3164 | } |
| 3165 | else if (need_strlen) |
| 3166 | packlen = strlen(packname); |
| 3167 | |
| 3168 | } |
| 3169 | else { |
| 3170 | /* the method name is qualified */ |
| 3171 | packname = name; |
| 3172 | packlen = sep - name; |
| 3173 | } |
| 3174 | |
| 3175 | /* we're relying on gv_fetchmethod not autovivifying the stash */ |
| 3176 | if (gv_stashpvn(packname, packlen, FALSE)) { |
| 3177 | Perl_croak(aTHX_ |
| 3178 | "Can't locate object method \"%s\" via package \"%.*s\"", |
| 3179 | leaf, (int)packlen, packname); |
| 3180 | } |
| 3181 | else { |
| 3182 | Perl_croak(aTHX_ |
| 3183 | "Can't locate object method \"%s\" via package \"%.*s\"" |
| 3184 | " (perhaps you forgot to load \"%.*s\"?)", |
| 3185 | leaf, (int)packlen, packname, (int)packlen, packname); |
| 3186 | } |
| 3187 | } |
| 3188 | return isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv; |
| 3189 | } |
| 3190 | |
| 3191 | /* |
| 3192 | * Local variables: |
| 3193 | * c-indentation-style: bsd |
| 3194 | * c-basic-offset: 4 |
| 3195 | * indent-tabs-mode: t |
| 3196 | * End: |
| 3197 | * |
| 3198 | * ex: set ts=8 sts=4 sw=4 noet: |
| 3199 | */ |