https://perl5.git.perl.org / perl5.git / blame
| Commit | Line | Data |
|---|---|---|
| a0d0e21e LW |
1 | /* pp_hot.c |
| 2 | * | |
| 1129b882 NC |
3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others | |
| a0d0e21e LW |
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 | * | |
| 4ac71550 TC |
15 | * Awake! Awake! Fear, Fire, Foes! Awake! |
| 16 | * Fire, Foes! Awake! | |
| 17 | * | |
| 18 | * [p.1007 of _The Lord of the Rings_, VI/viii: "The Scouring of the Shire"] | |
| a0d0e21e LW |
19 | */ |
| 20 | ||
| 166f8a29 DM |
21 | /* This file contains 'hot' pp ("push/pop") functions that |
| 22 | * execute the opcodes that make up a perl program. A typical pp function | |
| 23 | * expects to find its arguments on the stack, and usually pushes its | |
| 24 | * results onto the stack, hence the 'pp' terminology. Each OP structure | |
| 25 | * contains a pointer to the relevant pp_foo() function. | |
| 26 | * | |
| 27 | * By 'hot', we mean common ops whose execution speed is critical. | |
| 28 | * By gathering them together into a single file, we encourage | |
| 29 | * CPU cache hits on hot code. Also it could be taken as a warning not to | |
| 30 | * change any code in this file unless you're sure it won't affect | |
| 31 | * performance. | |
| 32 | */ | |
| 33 | ||
| a0d0e21e | 34 | #include "EXTERN.h" |
| 864dbfa3 | 35 | #define PERL_IN_PP_HOT_C |
| a0d0e21e LW |
36 | #include "perl.h" |
| 37 | ||
| 38 | /* Hot code. */ | |
| 39 | ||
| 40 | PP(pp_const) | |
| 41 | { | |
| 97aff369 | 42 | dVAR; |
| 39644a26 | 43 | dSP; |
| 996c9baa | 44 | XPUSHs(cSVOP_sv); |
| a0d0e21e LW |
45 | RETURN; |
| 46 | } | |
| 47 | ||
| 48 | PP(pp_nextstate) | |
| 49 | { | |
| 97aff369 | 50 | dVAR; |
| 533c011a | 51 | PL_curcop = (COP*)PL_op; |
| a0d0e21e | 52 | TAINT_NOT; /* Each statement is presumed innocent */ |
| 3280af22 | 53 | PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp; |
| a0d0e21e | 54 | FREETMPS; |
| f410a211 | 55 | PERL_ASYNC_CHECK(); |
| a0d0e21e LW |
56 | return NORMAL; |
| 57 | } | |
| 58 | ||
| 59 | PP(pp_gvsv) | |
| 60 | { | |
| 97aff369 | 61 | dVAR; |
| 39644a26 | 62 | dSP; |
| 924508f0 | 63 | EXTEND(SP,1); |
| 533c011a | 64 | if (PL_op->op_private & OPpLVAL_INTRO) |
| 1d7c1841 | 65 | PUSHs(save_scalar(cGVOP_gv)); |
| a0d0e21e | 66 | else |
| c69033f2 | 67 | PUSHs(GvSVn(cGVOP_gv)); |
| a0d0e21e LW |
68 | RETURN; |
| 69 | } | |
| 70 | ||
| 71 | PP(pp_null) | |
| 72 | { | |
| 97aff369 | 73 | dVAR; |
| a0d0e21e LW |
74 | return NORMAL; |
| 75 | } | |
| 76 | ||
| 5d8673bc | 77 | /* This is sometimes called directly by pp_coreargs and pp_grepstart. */ |
| a0d0e21e LW |
78 | PP(pp_pushmark) |
| 79 | { | |
| 97aff369 | 80 | dVAR; |
| 3280af22 | 81 | PUSHMARK(PL_stack_sp); |
| a0d0e21e LW |
82 | return NORMAL; |
| 83 | } | |
| 84 | ||
| 85 | PP(pp_stringify) | |
| 86 | { | |
| 97aff369 | 87 | dVAR; dSP; dTARGET; |
| 6050d10e | 88 | sv_copypv(TARG,TOPs); |
| a0d0e21e LW |
89 | SETTARG; |
| 90 | RETURN; | |
| 91 | } | |
| 92 | ||
| 93 | PP(pp_gv) | |
| 94 | { | |
| 97aff369 | 95 | dVAR; dSP; |
| ad64d0ec | 96 | XPUSHs(MUTABLE_SV(cGVOP_gv)); |
| a0d0e21e LW |
97 | RETURN; |
| 98 | } | |
| 99 | ||
| 100 | PP(pp_and) | |
| 101 | { | |
| 97aff369 | 102 | dVAR; dSP; |
| f410a211 | 103 | PERL_ASYNC_CHECK(); |
| a0d0e21e LW |
104 | if (!SvTRUE(TOPs)) |
| 105 | RETURN; | |
| 106 | else { | |
| c960fc3b SP |
107 | if (PL_op->op_type == OP_AND) |
| 108 | --SP; | |
| a0d0e21e LW |
109 | RETURNOP(cLOGOP->op_other); |
| 110 | } | |
| 111 | } | |
| 112 | ||
| 113 | PP(pp_sassign) | |
| 114 | { | |
| 3e75a3c4 RU |
115 | dVAR; dSP; |
| 116 | /* sassign keeps its args in the optree traditionally backwards. | |
| 117 | So we pop them differently. | |
| 118 | */ | |
| 119 | SV *left = POPs; SV *right = TOPs; | |
| 748a9306 | 120 | |
| 533c011a | 121 | if (PL_op->op_private & OPpASSIGN_BACKWARDS) { |
| 0bd48802 AL |
122 | SV * const temp = left; |
| 123 | left = right; right = temp; | |
| a0d0e21e | 124 | } |
| 284167a5 | 125 | if (TAINTING_get && TAINT_get && !SvTAINTED(right)) |
| a0d0e21e | 126 | TAINT_NOT; |
| e26df76a | 127 | if (PL_op->op_private & OPpASSIGN_CV_TO_GV) { |
| 3e75a3c4 | 128 | SV * const cv = SvRV(right); |
| e26df76a | 129 | const U32 cv_type = SvTYPE(cv); |
| 3e75a3c4 | 130 | const bool is_gv = isGV_with_GP(left); |
| 6136c704 | 131 | const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM; |
| e26df76a NC |
132 | |
| 133 | if (!got_coderef) { | |
| 134 | assert(SvROK(cv)); | |
| 135 | } | |
| 136 | ||
| 3e75a3c4 RU |
137 | /* Can do the optimisation if left (LVALUE) is not a typeglob, |
| 138 | right (RVALUE) is a reference to something, and we're in void | |
| e26df76a | 139 | context. */ |
| 13be902c | 140 | if (!got_coderef && !is_gv && GIMME_V == G_VOID) { |
| e26df76a | 141 | /* Is the target symbol table currently empty? */ |
| 3e75a3c4 | 142 | GV * const gv = gv_fetchsv_nomg(left, GV_NOINIT, SVt_PVGV); |
| bb112e5a | 143 | if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) { |
| e26df76a NC |
144 | /* Good. Create a new proxy constant subroutine in the target. |
| 145 | The gv becomes a(nother) reference to the constant. */ | |
| 146 | SV *const value = SvRV(cv); | |
| 147 | ||
| ad64d0ec | 148 | SvUPGRADE(MUTABLE_SV(gv), SVt_IV); |
| 1ccdb730 | 149 | SvPCS_IMPORTED_on(gv); |
| e26df76a | 150 | SvRV_set(gv, value); |
| b37c2d43 | 151 | SvREFCNT_inc_simple_void(value); |
| 3e75a3c4 | 152 | SETs(left); |
| e26df76a NC |
153 | RETURN; |
| 154 | } | |
| 155 | } | |
| 156 | ||
| 157 | /* Need to fix things up. */ | |
| 13be902c | 158 | if (!is_gv) { |
| e26df76a | 159 | /* Need to fix GV. */ |
| 3e75a3c4 | 160 | left = MUTABLE_SV(gv_fetchsv_nomg(left,GV_ADD, SVt_PVGV)); |
| e26df76a NC |
161 | } |
| 162 | ||
| 163 | if (!got_coderef) { | |
| 164 | /* We've been returned a constant rather than a full subroutine, | |
| 165 | but they expect a subroutine reference to apply. */ | |
| 53a42478 | 166 | if (SvROK(cv)) { |
| d343c3ef | 167 | ENTER_with_name("sassign_coderef"); |
| 53a42478 NC |
168 | SvREFCNT_inc_void(SvRV(cv)); |
| 169 | /* newCONSTSUB takes a reference count on the passed in SV | |
| 170 | from us. We set the name to NULL, otherwise we get into | |
| 171 | all sorts of fun as the reference to our new sub is | |
| 172 | donated to the GV that we're about to assign to. | |
| 173 | */ | |
| 3e75a3c4 | 174 | SvRV_set(right, MUTABLE_SV(newCONSTSUB(GvSTASH(left), NULL, |
| ad64d0ec | 175 | SvRV(cv)))); |
| 53a42478 | 176 | SvREFCNT_dec(cv); |
| d343c3ef | 177 | LEAVE_with_name("sassign_coderef"); |
| 53a42478 NC |
178 | } else { |
| 179 | /* What can happen for the corner case *{"BONK"} = \&{"BONK"}; | |
| 180 | is that | |
| 181 | First: ops for \&{"BONK"}; return us the constant in the | |
| 182 | symbol table | |
| 183 | Second: ops for *{"BONK"} cause that symbol table entry | |
| 184 | (and our reference to it) to be upgraded from RV | |
| 185 | to typeblob) | |
| 186 | Thirdly: We get here. cv is actually PVGV now, and its | |
| 187 | GvCV() is actually the subroutine we're looking for | |
| 188 | ||
| 189 | So change the reference so that it points to the subroutine | |
| 190 | of that typeglob, as that's what they were after all along. | |
| 191 | */ | |
| 159b6efe | 192 | GV *const upgraded = MUTABLE_GV(cv); |
| 53a42478 NC |
193 | CV *const source = GvCV(upgraded); |
| 194 | ||
| 195 | assert(source); | |
| 196 | assert(CvFLAGS(source) & CVf_CONST); | |
| 197 | ||
| 198 | SvREFCNT_inc_void(source); | |
| 199 | SvREFCNT_dec(upgraded); | |
| 3e75a3c4 | 200 | SvRV_set(right, MUTABLE_SV(source)); |
| 53a42478 | 201 | } |
| e26df76a | 202 | } |
| 53a42478 | 203 | |
| e26df76a | 204 | } |
| 8fe85e3f | 205 | if ( |
| 3e75a3c4 RU |
206 | SvTEMP(left) && !SvSMAGICAL(left) && SvREFCNT(left) == 1 && |
| 207 | (!isGV_with_GP(left) || SvFAKE(left)) && ckWARN(WARN_MISC) | |
| 8fe85e3f FC |
208 | ) |
| 209 | Perl_warner(aTHX_ | |
| 210 | packWARN(WARN_MISC), "Useless assignment to a temporary" | |
| 211 | ); | |
| 3e75a3c4 RU |
212 | SvSetMagicSV(left, right); |
| 213 | SETs(left); | |
| a0d0e21e LW |
214 | RETURN; |
| 215 | } | |
| 216 | ||
| 217 | PP(pp_cond_expr) | |
| 218 | { | |
| 97aff369 | 219 | dVAR; dSP; |
| f410a211 | 220 | PERL_ASYNC_CHECK(); |
| a0d0e21e | 221 | if (SvTRUEx(POPs)) |
| 1a67a97c | 222 | RETURNOP(cLOGOP->op_other); |
| a0d0e21e | 223 | else |
| 1a67a97c | 224 | RETURNOP(cLOGOP->op_next); |
| a0d0e21e LW |
225 | } |
| 226 | ||
| 227 | PP(pp_unstack) | |
| 228 | { | |
| 97aff369 | 229 | dVAR; |
| 8f3964af | 230 | PERL_ASYNC_CHECK(); |
| a0d0e21e | 231 | TAINT_NOT; /* Each statement is presumed innocent */ |
| 3280af22 | 232 | PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp; |
| a0d0e21e | 233 | FREETMPS; |
| eae48c89 Z |
234 | if (!(PL_op->op_flags & OPf_SPECIAL)) { |
| 235 | I32 oldsave = PL_scopestack[PL_scopestack_ix - 1]; | |
| 236 | LEAVE_SCOPE(oldsave); | |
| 237 | } | |
| a0d0e21e LW |
238 | return NORMAL; |
| 239 | } | |
| 240 | ||
| a0d0e21e LW |
241 | PP(pp_concat) |
| 242 | { | |
| 6f1401dc | 243 | dVAR; dSP; dATARGET; tryAMAGICbin_MG(concat_amg, AMGf_assign); |
| 748a9306 LW |
244 | { |
| 245 | dPOPTOPssrl; | |
| 8d6d96c1 HS |
246 | bool lbyte; |
| 247 | STRLEN rlen; | |
| d4c19fe8 | 248 | const char *rpv = NULL; |
| a6b599c7 | 249 | bool rbyte = FALSE; |
| a9c4fd4e | 250 | bool rcopied = FALSE; |
| 8d6d96c1 | 251 | |
| 6f1401dc DM |
252 | if (TARG == right && right != left) { /* $r = $l.$r */ |
| 253 | rpv = SvPV_nomg_const(right, rlen); | |
| c75ab21a | 254 | rbyte = !DO_UTF8(right); |
| 59cd0e26 | 255 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
| 349d4f2f | 256 | rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */ |
| db79b45b | 257 | rcopied = TRUE; |
| 8d6d96c1 | 258 | } |
| 7889fe52 | 259 | |
| 89734059 | 260 | if (TARG != left) { /* not $l .= $r */ |
| a9c4fd4e | 261 | STRLEN llen; |
| 6f1401dc | 262 | const char* const lpv = SvPV_nomg_const(left, llen); |
| 90f5826e | 263 | lbyte = !DO_UTF8(left); |
| 8d6d96c1 HS |
264 | sv_setpvn(TARG, lpv, llen); |
| 265 | if (!lbyte) | |
| 266 | SvUTF8_on(TARG); | |
| 267 | else | |
| 268 | SvUTF8_off(TARG); | |
| 269 | } | |
| 89734059 | 270 | else { /* $l .= $r */ |
| c75ab21a | 271 | if (!SvOK(TARG)) { |
| 89734059 | 272 | if (left == right && ckWARN(WARN_UNINITIALIZED)) /* $l .= $l */ |
| c75ab21a | 273 | report_uninit(right); |
| 76f68e9b | 274 | sv_setpvs(left, ""); |
| c75ab21a | 275 | } |
| 583a5589 FC |
276 | SvPV_force_nomg_nolen(left); |
| 277 | lbyte = !DO_UTF8(left); | |
| 90f5826e TS |
278 | if (IN_BYTES) |
| 279 | SvUTF8_off(TARG); | |
| 8d6d96c1 | 280 | } |
| a12c0f56 | 281 | |
| c75ab21a | 282 | if (!rcopied) { |
| 6f1401dc | 283 | if (left == right) |
| 89734059 | 284 | /* $r.$r: do magic twice: tied might return different 2nd time */ |
| 6f1401dc DM |
285 | SvGETMAGIC(right); |
| 286 | rpv = SvPV_nomg_const(right, rlen); | |
| c75ab21a RH |
287 | rbyte = !DO_UTF8(right); |
| 288 | } | |
| 8d6d96c1 | 289 | if (lbyte != rbyte) { |
| e3393f51 NT |
290 | /* sv_utf8_upgrade_nomg() may reallocate the stack */ |
| 291 | PUTBACK; | |
| 8d6d96c1 HS |
292 | if (lbyte) |
| 293 | sv_utf8_upgrade_nomg(TARG); | |
| 294 | else { | |
| db79b45b | 295 | if (!rcopied) |
| 59cd0e26 | 296 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
| 8d6d96c1 | 297 | sv_utf8_upgrade_nomg(right); |
| 6f1401dc | 298 | rpv = SvPV_nomg_const(right, rlen); |
| 69b47968 | 299 | } |
| e3393f51 | 300 | SPAGAIN; |
| a0d0e21e | 301 | } |
| 8d6d96c1 | 302 | sv_catpvn_nomg(TARG, rpv, rlen); |
| 43ebc500 | 303 | |
| a0d0e21e LW |
304 | SETTARG; |
| 305 | RETURN; | |
| 748a9306 | 306 | } |
| a0d0e21e LW |
307 | } |
| 308 | ||
| d5524600 DM |
309 | /* push the elements of av onto the stack. |
| 310 | * XXX Note that padav has similar code but without the mg_get(). | |
| 311 | * I suspect that the mg_get is no longer needed, but while padav | |
| 312 | * differs, it can't share this function */ | |
| 313 | ||
| 314 | void | |
| 315 | S_pushav(pTHX_ AV* const av) | |
| 316 | { | |
| 317 | dSP; | |
| 318 | const I32 maxarg = AvFILL(av) + 1; | |
| 319 | EXTEND(SP, maxarg); | |
| 320 | if (SvRMAGICAL(av)) { | |
| 321 | U32 i; | |
| 322 | for (i=0; i < (U32)maxarg; i++) { | |
| 323 | SV ** const svp = av_fetch(av, i, FALSE); | |
| 324 | /* See note in pp_helem, and bug id #27839 */ | |
| 325 | SP[i+1] = svp | |
| 326 | ? SvGMAGICAL(*svp) ? (mg_get(*svp), *svp) : *svp | |
| 327 | : &PL_sv_undef; | |
| 328 | } | |
| 329 | } | |
| 330 | else { | |
| 331 | Copy(AvARRAY(av), SP+1, maxarg, SV*); | |
| 332 | } | |
| 333 | SP += maxarg; | |
| 334 | PUTBACK; | |
| 335 | } | |
| 336 | ||
| 337 | ||
| a7fd8ef6 DM |
338 | /* ($lex1,@lex2,...) or my ($lex1,@lex2,...) */ |
| 339 | ||
| 340 | PP(pp_padrange) | |
| 341 | { | |
| 342 | dVAR; dSP; | |
| 343 | PADOFFSET base = PL_op->op_targ; | |
| 344 | int count = (int)(PL_op->op_private) & OPpPADRANGE_COUNTMASK; | |
| 345 | int i; | |
| d5524600 DM |
346 | if (PL_op->op_flags & OPf_SPECIAL) { |
| 347 | /* fake the RHS of my ($x,$y,..) = @_ */ | |
| 348 | PUSHMARK(SP); | |
| 349 | S_pushav(aTHX_ GvAVn(PL_defgv)); | |
| 350 | SPAGAIN; | |
| 351 | } | |
| 352 | ||
| a7fd8ef6 DM |
353 | /* note, this is only skipped for compile-time-known void cxt */ |
| 354 | if ((PL_op->op_flags & OPf_WANT) != OPf_WANT_VOID) { | |
| 355 | EXTEND(SP, count); | |
| 356 | PUSHMARK(SP); | |
| 357 | for (i = 0; i <count; i++) | |
| 358 | *++SP = PAD_SV(base+i); | |
| 359 | } | |
| 360 | if (PL_op->op_private & OPpLVAL_INTRO) { | |
| 4e09461c DM |
361 | SV **svp = &(PAD_SVl(base)); |
| 362 | const UV payload = (UV)( | |
| 363 | (base << (OPpPADRANGE_COUNTSHIFT + SAVE_TIGHT_SHIFT)) | |
| 364 | | (count << SAVE_TIGHT_SHIFT) | |
| 365 | | SAVEt_CLEARPADRANGE); | |
| 366 | assert(OPpPADRANGE_COUNTMASK + 1 == (1 <<OPpPADRANGE_COUNTSHIFT)); | |
| 367 | assert((payload >> (OPpPADRANGE_COUNTSHIFT+SAVE_TIGHT_SHIFT)) == base); | |
| 368 | SSCHECK(1); | |
| 369 | SSPUSHUV(payload); | |
| 370 | ||
| a7fd8ef6 | 371 | for (i = 0; i <count; i++) |
| 4e09461c | 372 | SvPADSTALE_off(*svp++); /* mark lexical as active */ |
| a7fd8ef6 DM |
373 | } |
| 374 | RETURN; | |
| 375 | } | |
| 376 | ||
| 377 | ||
| a0d0e21e LW |
378 | PP(pp_padsv) |
| 379 | { | |
| 97aff369 | 380 | dVAR; dSP; dTARGET; |
| a0d0e21e | 381 | XPUSHs(TARG); |
| 533c011a NIS |
382 | if (PL_op->op_flags & OPf_MOD) { |
| 383 | if (PL_op->op_private & OPpLVAL_INTRO) | |
| 952306ac RGS |
384 | if (!(PL_op->op_private & OPpPAD_STATE)) |
| 385 | SAVECLEARSV(PAD_SVl(PL_op->op_targ)); | |
| a62b51b8 | 386 | if (PL_op->op_private & OPpDEREF) { |
| 8ec5e241 | 387 | PUTBACK; |
| 9026059d | 388 | TOPs = vivify_ref(TOPs, PL_op->op_private & OPpDEREF); |
| 8ec5e241 NIS |
389 | SPAGAIN; |
| 390 | } | |
| 4633a7c4 | 391 | } |
| a0d0e21e LW |
392 | RETURN; |
| 393 | } | |
| 394 | ||
| 395 | PP(pp_readline) | |
| 396 | { | |
| 97aff369 | 397 | dVAR; |
| 30901a8a FC |
398 | dSP; |
| 399 | if (TOPs) { | |
| 400 | SvGETMAGIC(TOPs); | |
| 67288365 | 401 | tryAMAGICunTARGETlist(iter_amg, 0, 0); |
| 30901a8a FC |
402 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
| 403 | } | |
| 404 | else PL_last_in_gv = PL_argvgv, PL_stack_sp--; | |
| 6e592b3a BM |
405 | if (!isGV_with_GP(PL_last_in_gv)) { |
| 406 | if (SvROK(PL_last_in_gv) && isGV_with_GP(SvRV(PL_last_in_gv))) | |
| 159b6efe | 407 | PL_last_in_gv = MUTABLE_GV(SvRV(PL_last_in_gv)); |
| 8efb3254 | 408 | else { |
| f5284f61 | 409 | dSP; |
| ad64d0ec | 410 | XPUSHs(MUTABLE_SV(PL_last_in_gv)); |
| f5284f61 | 411 | PUTBACK; |
| 897d3989 | 412 | Perl_pp_rv2gv(aTHX); |
| 159b6efe | 413 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
| f5284f61 IZ |
414 | } |
| 415 | } | |
| a0d0e21e LW |
416 | return do_readline(); |
| 417 | } | |
| 418 | ||
| 419 | PP(pp_eq) | |
| 420 | { | |
| 6f1401dc | 421 | dVAR; dSP; |
| 33efebe6 DM |
422 | SV *left, *right; |
| 423 | ||
| a42d0242 | 424 | tryAMAGICbin_MG(eq_amg, AMGf_set|AMGf_numeric); |
| 33efebe6 DM |
425 | right = POPs; |
| 426 | left = TOPs; | |
| 427 | SETs(boolSV( | |
| 428 | (SvIOK_notUV(left) && SvIOK_notUV(right)) | |
| 429 | ? (SvIVX(left) == SvIVX(right)) | |
| 430 | : ( do_ncmp(left, right) == 0) | |
| 431 | )); | |
| 432 | RETURN; | |
| a0d0e21e LW |
433 | } |
| 434 | ||
| 435 | PP(pp_preinc) | |
| 436 | { | |
| 97aff369 | 437 | dVAR; dSP; |
| 17058fe0 FC |
438 | const bool inc = |
| 439 | PL_op->op_type == OP_PREINC || PL_op->op_type == OP_I_PREINC; | |
| 60092ce4 | 440 | if (SvTYPE(TOPs) >= SVt_PVAV || (isGV_with_GP(TOPs) && !SvFAKE(TOPs))) |
| cb077ed2 | 441 | Perl_croak_no_modify(); |
| 4bac9ae4 | 442 | if (!SvREADONLY(TOPs) && !SvGMAGICAL(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) |
| 17058fe0 | 443 | && SvIVX(TOPs) != (inc ? IV_MAX : IV_MIN)) |
| 55497cff | 444 | { |
| 17058fe0 | 445 | SvIV_set(TOPs, SvIVX(TOPs) + (inc ? 1 : -1)); |
| 55497cff | 446 | SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK); |
| 748a9306 | 447 | } |
| 28e5dec8 | 448 | else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */ |
| 17058fe0 FC |
449 | if (inc) sv_inc(TOPs); |
| 450 | else sv_dec(TOPs); | |
| a0d0e21e LW |
451 | SvSETMAGIC(TOPs); |
| 452 | return NORMAL; | |
| 453 | } | |
| 454 | ||
| 455 | PP(pp_or) | |
| 456 | { | |
| 97aff369 | 457 | dVAR; dSP; |
| f410a211 | 458 | PERL_ASYNC_CHECK(); |
| a0d0e21e LW |
459 | if (SvTRUE(TOPs)) |
| 460 | RETURN; | |
| 461 | else { | |
| c960fc3b SP |
462 | if (PL_op->op_type == OP_OR) |
| 463 | --SP; | |
| a0d0e21e LW |
464 | RETURNOP(cLOGOP->op_other); |
| 465 | } | |
| 466 | } | |
| 467 | ||
| 25a55bd7 | 468 | PP(pp_defined) |
| c963b151 | 469 | { |
| 97aff369 | 470 | dVAR; dSP; |
| eb578fdb | 471 | SV* sv; |
| 6136c704 | 472 | bool defined; |
| 25a55bd7 | 473 | const int op_type = PL_op->op_type; |
| ea5195b7 | 474 | const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN); |
| c963b151 | 475 | |
| 6136c704 | 476 | if (is_dor) { |
| f410a211 | 477 | PERL_ASYNC_CHECK(); |
| 25a55bd7 SP |
478 | sv = TOPs; |
| 479 | if (!sv || !SvANY(sv)) { | |
| 2bd49cfc NC |
480 | if (op_type == OP_DOR) |
| 481 | --SP; | |
| 25a55bd7 SP |
482 | RETURNOP(cLOGOP->op_other); |
| 483 | } | |
| b7c44293 RGS |
484 | } |
| 485 | else { | |
| 486 | /* OP_DEFINED */ | |
| 25a55bd7 SP |
487 | sv = POPs; |
| 488 | if (!sv || !SvANY(sv)) | |
| 489 | RETPUSHNO; | |
| b7c44293 | 490 | } |
| 25a55bd7 | 491 | |
| 6136c704 | 492 | defined = FALSE; |
| c963b151 BD |
493 | switch (SvTYPE(sv)) { |
| 494 | case SVt_PVAV: | |
| 495 | if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
| 25a55bd7 | 496 | defined = TRUE; |
| c963b151 BD |
497 | break; |
| 498 | case SVt_PVHV: | |
| 499 | if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
| 25a55bd7 | 500 | defined = TRUE; |
| c963b151 BD |
501 | break; |
| 502 | case SVt_PVCV: | |
| 503 | if (CvROOT(sv) || CvXSUB(sv)) | |
| 25a55bd7 | 504 | defined = TRUE; |
| c963b151 BD |
505 | break; |
| 506 | default: | |
| 5b295bef | 507 | SvGETMAGIC(sv); |
| c963b151 | 508 | if (SvOK(sv)) |
| 25a55bd7 | 509 | defined = TRUE; |
| 6136c704 | 510 | break; |
| c963b151 | 511 | } |
| 6136c704 AL |
512 | |
| 513 | if (is_dor) { | |
| c960fc3b SP |
514 | if(defined) |
| 515 | RETURN; | |
| 516 | if(op_type == OP_DOR) | |
| 517 | --SP; | |
| 25a55bd7 | 518 | RETURNOP(cLOGOP->op_other); |
| 25a55bd7 | 519 | } |
| d9aa96a4 SP |
520 | /* assuming OP_DEFINED */ |
| 521 | if(defined) | |
| 522 | RETPUSHYES; | |
| 523 | RETPUSHNO; | |
| c963b151 BD |
524 | } |
| 525 | ||
| a0d0e21e LW |
526 | PP(pp_add) |
| 527 | { | |
| 800401ee | 528 | dVAR; dSP; dATARGET; bool useleft; SV *svl, *svr; |
| 6f1401dc DM |
529 | tryAMAGICbin_MG(add_amg, AMGf_assign|AMGf_numeric); |
| 530 | svr = TOPs; | |
| 531 | svl = TOPm1s; | |
| 532 | ||
| 800401ee | 533 | useleft = USE_LEFT(svl); |
| 28e5dec8 JH |
534 | #ifdef PERL_PRESERVE_IVUV |
| 535 | /* We must see if we can perform the addition with integers if possible, | |
| 536 | as the integer code detects overflow while the NV code doesn't. | |
| 537 | If either argument hasn't had a numeric conversion yet attempt to get | |
| 538 | the IV. It's important to do this now, rather than just assuming that | |
| 539 | it's not IOK as a PV of "9223372036854775806" may not take well to NV | |
| 540 | addition, and an SV which is NOK, NV=6.0 ought to be coerced to | |
| 541 | integer in case the second argument is IV=9223372036854775806 | |
| 542 | We can (now) rely on sv_2iv to do the right thing, only setting the | |
| 543 | public IOK flag if the value in the NV (or PV) slot is truly integer. | |
| 544 | ||
| 545 | A side effect is that this also aggressively prefers integer maths over | |
| 7dca457a NC |
546 | fp maths for integer values. |
| 547 | ||
| a00b5bd3 | 548 | How to detect overflow? |
| 7dca457a NC |
549 | |
| 550 | C 99 section 6.2.6.1 says | |
| 551 | ||
| 552 | The range of nonnegative values of a signed integer type is a subrange | |
| 553 | of the corresponding unsigned integer type, and the representation of | |
| 554 | the same value in each type is the same. A computation involving | |
| 555 | unsigned operands can never overflow, because a result that cannot be | |
| 556 | represented by the resulting unsigned integer type is reduced modulo | |
| 557 | the number that is one greater than the largest value that can be | |
| 558 | represented by the resulting type. | |
| 559 | ||
| 560 | (the 9th paragraph) | |
| 561 | ||
| 562 | which I read as "unsigned ints wrap." | |
| 563 | ||
| 564 | signed integer overflow seems to be classed as "exception condition" | |
| 565 | ||
| 566 | If an exceptional condition occurs during the evaluation of an | |
| 567 | expression (that is, if the result is not mathematically defined or not | |
| 568 | in the range of representable values for its type), the behavior is | |
| 569 | undefined. | |
| 570 | ||
| 571 | (6.5, the 5th paragraph) | |
| 572 | ||
| 573 | I had assumed that on 2s complement machines signed arithmetic would | |
| 574 | wrap, hence coded pp_add and pp_subtract on the assumption that | |
| 575 | everything perl builds on would be happy. After much wailing and | |
| 576 | gnashing of teeth it would seem that irix64 knows its ANSI spec well, | |
| 577 | knows that it doesn't need to, and doesn't. Bah. Anyway, the all- | |
| 578 | unsigned code below is actually shorter than the old code. :-) | |
| 579 | */ | |
| 580 | ||
| 01f91bf2 | 581 | if (SvIV_please_nomg(svr)) { |
| 28e5dec8 JH |
582 | /* Unless the left argument is integer in range we are going to have to |
| 583 | use NV maths. Hence only attempt to coerce the right argument if | |
| 584 | we know the left is integer. */ | |
| eb578fdb | 585 | UV auv = 0; |
| 9c5ffd7c | 586 | bool auvok = FALSE; |
| 7dca457a NC |
587 | bool a_valid = 0; |
| 588 | ||
| 28e5dec8 | 589 | if (!useleft) { |
| 7dca457a NC |
590 | auv = 0; |
| 591 | a_valid = auvok = 1; | |
| 592 | /* left operand is undef, treat as zero. + 0 is identity, | |
| 593 | Could SETi or SETu right now, but space optimise by not adding | |
| 594 | lots of code to speed up what is probably a rarish case. */ | |
| 595 | } else { | |
| 596 | /* Left operand is defined, so is it IV? */ | |
| 01f91bf2 | 597 | if (SvIV_please_nomg(svl)) { |
| 800401ee JH |
598 | if ((auvok = SvUOK(svl))) |
| 599 | auv = SvUVX(svl); | |
| 7dca457a | 600 | else { |
| eb578fdb | 601 | const IV aiv = SvIVX(svl); |
| 7dca457a NC |
602 | if (aiv >= 0) { |
| 603 | auv = aiv; | |
| 604 | auvok = 1; /* Now acting as a sign flag. */ | |
| 605 | } else { /* 2s complement assumption for IV_MIN */ | |
| 606 | auv = (UV)-aiv; | |
| 607 | } | |
| 608 | } | |
| 609 | a_valid = 1; | |
| 28e5dec8 JH |
610 | } |
| 611 | } | |
| 7dca457a NC |
612 | if (a_valid) { |
| 613 | bool result_good = 0; | |
| 614 | UV result; | |
| eb578fdb | 615 | UV buv; |
| 800401ee | 616 | bool buvok = SvUOK(svr); |
| a00b5bd3 | 617 | |
| 7dca457a | 618 | if (buvok) |
| 800401ee | 619 | buv = SvUVX(svr); |
| 7dca457a | 620 | else { |
| eb578fdb | 621 | const IV biv = SvIVX(svr); |
| 7dca457a NC |
622 | if (biv >= 0) { |
| 623 | buv = biv; | |
| 624 | buvok = 1; | |
| 625 | } else | |
| 626 | buv = (UV)-biv; | |
| 627 | } | |
| 628 | /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve, | |
| 602f51c4 | 629 | else "IV" now, independent of how it came in. |
| 7dca457a NC |
630 | if a, b represents positive, A, B negative, a maps to -A etc |
| 631 | a + b => (a + b) | |
| 632 | A + b => -(a - b) | |
| 633 | a + B => (a - b) | |
| 634 | A + B => -(a + b) | |
| 635 | all UV maths. negate result if A negative. | |
| 636 | add if signs same, subtract if signs differ. */ | |
| 637 | ||
| 638 | if (auvok ^ buvok) { | |
| 639 | /* Signs differ. */ | |
| 640 | if (auv >= buv) { | |
| 641 | result = auv - buv; | |
| 642 | /* Must get smaller */ | |
| 643 | if (result <= auv) | |
| 644 | result_good = 1; | |
| 645 | } else { | |
| 646 | result = buv - auv; | |
| 647 | if (result <= buv) { | |
| 648 | /* result really should be -(auv-buv). as its negation | |
| 649 | of true value, need to swap our result flag */ | |
| 650 | auvok = !auvok; | |
| 651 | result_good = 1; | |
| 28e5dec8 JH |
652 | } |
| 653 | } | |
| 7dca457a NC |
654 | } else { |
| 655 | /* Signs same */ | |
| 656 | result = auv + buv; | |
| 657 | if (result >= auv) | |
| 658 | result_good = 1; | |
| 659 | } | |
| 660 | if (result_good) { | |
| 661 | SP--; | |
| 662 | if (auvok) | |
| 28e5dec8 | 663 | SETu( result ); |
| 7dca457a NC |
664 | else { |
| 665 | /* Negate result */ | |
| 666 | if (result <= (UV)IV_MIN) | |
| 667 | SETi( -(IV)result ); | |
| 668 | else { | |
| 669 | /* result valid, but out of range for IV. */ | |
| 670 | SETn( -(NV)result ); | |
| 28e5dec8 JH |
671 | } |
| 672 | } | |
| 7dca457a NC |
673 | RETURN; |
| 674 | } /* Overflow, drop through to NVs. */ | |
| 28e5dec8 JH |
675 | } |
| 676 | } | |
| 677 | #endif | |
| a0d0e21e | 678 | { |
| 6f1401dc | 679 | NV value = SvNV_nomg(svr); |
| 4efa5a16 | 680 | (void)POPs; |
| 28e5dec8 JH |
681 | if (!useleft) { |
| 682 | /* left operand is undef, treat as zero. + 0.0 is identity. */ | |
| 683 | SETn(value); | |
| 684 | RETURN; | |
| 685 | } | |
| 6f1401dc | 686 | SETn( value + SvNV_nomg(svl) ); |
| 28e5dec8 | 687 | RETURN; |
| a0d0e21e LW |
688 | } |
| 689 | } | |
| 690 | ||
| 691 | PP(pp_aelemfast) | |
| 692 | { | |
| 97aff369 | 693 | dVAR; dSP; |
| 93bad3fd | 694 | AV * const av = PL_op->op_type == OP_AELEMFAST_LEX |
| 8f878375 | 695 | ? MUTABLE_AV(PAD_SV(PL_op->op_targ)) : GvAVn(cGVOP_gv); |
| a3b680e6 | 696 | const U32 lval = PL_op->op_flags & OPf_MOD; |
| 0bd48802 | 697 | SV** const svp = av_fetch(av, PL_op->op_private, lval); |
| 3280af22 | 698 | SV *sv = (svp ? *svp : &PL_sv_undef); |
| 6ff81951 | 699 | EXTEND(SP, 1); |
| 39cf747a | 700 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
| fd69380d | 701 | mg_get(sv); |
| be6c24e0 | 702 | PUSHs(sv); |
| a0d0e21e LW |
703 | RETURN; |
| 704 | } | |
| 705 | ||
| 706 | PP(pp_join) | |
| 707 | { | |
| 97aff369 | 708 | dVAR; dSP; dMARK; dTARGET; |
| a0d0e21e LW |
709 | MARK++; |
| 710 | do_join(TARG, *MARK, MARK, SP); | |
| 711 | SP = MARK; | |
| 712 | SETs(TARG); | |
| 713 | RETURN; | |
| 714 | } | |
| 715 | ||
| 716 | PP(pp_pushre) | |
| 717 | { | |
| 97aff369 | 718 | dVAR; dSP; |
| 44a8e56a | 719 | #ifdef DEBUGGING |
| 720 | /* | |
| 721 | * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs | |
| 722 | * will be enough to hold an OP*. | |
| 723 | */ | |
| c4420975 | 724 | SV* const sv = sv_newmortal(); |
| 44a8e56a | 725 | sv_upgrade(sv, SVt_PVLV); |
| 726 | LvTYPE(sv) = '/'; | |
| 533c011a | 727 | Copy(&PL_op, &LvTARGOFF(sv), 1, OP*); |
| 44a8e56a | 728 | XPUSHs(sv); |
| 729 | #else | |
| ad64d0ec | 730 | XPUSHs(MUTABLE_SV(PL_op)); |
| 44a8e56a | 731 | #endif |
| a0d0e21e LW |
732 | RETURN; |
| 733 | } | |
| 734 | ||
| 735 | /* Oversized hot code. */ | |
| 736 | ||
| 737 | PP(pp_print) | |
| 738 | { | |
| 27da23d5 | 739 | dVAR; dSP; dMARK; dORIGMARK; |
| eb578fdb | 740 | PerlIO *fp; |
| 236988e4 | 741 | MAGIC *mg; |
| 159b6efe NC |
742 | GV * const gv |
| 743 | = (PL_op->op_flags & OPf_STACKED) ? MUTABLE_GV(*++MARK) : PL_defoutgv; | |
| 9c9f25b8 | 744 | IO *io = GvIO(gv); |
| 5b468f54 | 745 | |
| 9c9f25b8 | 746 | if (io |
| ad64d0ec | 747 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
| 5b468f54 | 748 | { |
| 01bb7c6d | 749 | had_magic: |
| 68dc0745 | 750 | if (MARK == ORIGMARK) { |
| 1c846c1f | 751 | /* If using default handle then we need to make space to |
| a60c0954 NIS |
752 | * pass object as 1st arg, so move other args up ... |
| 753 | */ | |
| 4352c267 | 754 | MEXTEND(SP, 1); |
| 68dc0745 | 755 | ++MARK; |
| 756 | Move(MARK, MARK + 1, (SP - MARK) + 1, SV*); | |
| 757 | ++SP; | |
| 758 | } | |
| 94bc412f NC |
759 | return Perl_tied_method(aTHX_ "PRINT", mark - 1, MUTABLE_SV(io), |
| 760 | mg, | |
| 761 | (G_SCALAR | TIED_METHOD_ARGUMENTS_ON_STACK | |
| 762 | | (PL_op->op_type == OP_SAY | |
| 763 | ? TIED_METHOD_SAY : 0)), sp - mark); | |
| 236988e4 | 764 | } |
| 9c9f25b8 | 765 | if (!io) { |
| 68b590d9 | 766 | if ( gv && GvEGVx(gv) && (io = GvIO(GvEGV(gv))) |
| ad64d0ec | 767 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
| 01bb7c6d | 768 | goto had_magic; |
| 51087808 | 769 | report_evil_fh(gv); |
| 93189314 | 770 | SETERRNO(EBADF,RMS_IFI); |
| a0d0e21e LW |
771 | goto just_say_no; |
| 772 | } | |
| 773 | else if (!(fp = IoOFP(io))) { | |
| 7716c5c5 NC |
774 | if (IoIFP(io)) |
| 775 | report_wrongway_fh(gv, '<'); | |
| 51087808 | 776 | else |
| 7716c5c5 | 777 | report_evil_fh(gv); |
| 93189314 | 778 | SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI); |
| a0d0e21e LW |
779 | goto just_say_no; |
| 780 | } | |
| 781 | else { | |
| e23d9e2f | 782 | SV * const ofs = GvSV(PL_ofsgv); /* $, */ |
| a0d0e21e | 783 | MARK++; |
| e23d9e2f | 784 | if (ofs && (SvGMAGICAL(ofs) || SvOK(ofs))) { |
| a0d0e21e LW |
785 | while (MARK <= SP) { |
| 786 | if (!do_print(*MARK, fp)) | |
| 787 | break; | |
| 788 | MARK++; | |
| 789 | if (MARK <= SP) { | |
| e23d9e2f CS |
790 | /* don't use 'ofs' here - it may be invalidated by magic callbacks */ |
| 791 | if (!do_print(GvSV(PL_ofsgv), fp)) { | |
| a0d0e21e LW |
792 | MARK--; |
| 793 | break; | |
| 794 | } | |
| 795 | } | |
| 796 | } | |
| 797 | } | |
| 798 | else { | |
| 799 | while (MARK <= SP) { | |
| 800 | if (!do_print(*MARK, fp)) | |
| 801 | break; | |
| 802 | MARK++; | |
| 803 | } | |
| 804 | } | |
| 805 | if (MARK <= SP) | |
| 806 | goto just_say_no; | |
| 807 | else { | |
| cfc4a7da GA |
808 | if (PL_op->op_type == OP_SAY) { |
| 809 | if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp)) | |
| 810 | goto just_say_no; | |
| 811 | } | |
| 812 | else if (PL_ors_sv && SvOK(PL_ors_sv)) | |
| 7889fe52 | 813 | if (!do_print(PL_ors_sv, fp)) /* $\ */ |
| a0d0e21e LW |
814 | goto just_say_no; |
| 815 | ||
| 816 | if (IoFLAGS(io) & IOf_FLUSH) | |
| 760ac839 | 817 | if (PerlIO_flush(fp) == EOF) |
| a0d0e21e LW |
818 | goto just_say_no; |
| 819 | } | |
| 820 | } | |
| 821 | SP = ORIGMARK; | |
| e52fd6f4 | 822 | XPUSHs(&PL_sv_yes); |
| a0d0e21e LW |
823 | RETURN; |
| 824 | ||
| 825 | just_say_no: | |
| 826 | SP = ORIGMARK; | |
| e52fd6f4 | 827 | XPUSHs(&PL_sv_undef); |
| a0d0e21e LW |
828 | RETURN; |
| 829 | } | |
| 830 | ||
| 831 | PP(pp_rv2av) | |
| 832 | { | |
| 97aff369 | 833 | dVAR; dSP; dTOPss; |
| cde874ca | 834 | const I32 gimme = GIMME_V; |
| 17ab7946 NC |
835 | static const char an_array[] = "an ARRAY"; |
| 836 | static const char a_hash[] = "a HASH"; | |
| 837 | const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV; | |
| d83b45b8 | 838 | const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV; |
| a0d0e21e | 839 | |
| 9026059d | 840 | SvGETMAGIC(sv); |
| a0d0e21e | 841 | if (SvROK(sv)) { |
| 93d7320b DM |
842 | if (SvAMAGIC(sv)) { |
| 843 | sv = amagic_deref_call(sv, is_pp_rv2av ? to_av_amg : to_hv_amg); | |
| 93d7320b | 844 | } |
| 17ab7946 NC |
845 | sv = SvRV(sv); |
| 846 | if (SvTYPE(sv) != type) | |
| dcbac5bb | 847 | /* diag_listed_as: Not an ARRAY reference */ |
| 17ab7946 | 848 | DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash); |
| 3da99855 FC |
849 | else if (PL_op->op_flags & OPf_MOD |
| 850 | && PL_op->op_private & OPpLVAL_INTRO) | |
| 851 | Perl_croak(aTHX_ "%s", PL_no_localize_ref); | |
| a0d0e21e | 852 | } |
| 9f527363 | 853 | else if (SvTYPE(sv) != type) { |
| 67955e0c | 854 | GV *gv; |
| 1c846c1f | 855 | |
| 6e592b3a | 856 | if (!isGV_with_GP(sv)) { |
| dc3c76f8 NC |
857 | gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash, |
| 858 | type, &sp); | |
| 859 | if (!gv) | |
| 860 | RETURN; | |
| 35cd451c GS |
861 | } |
| 862 | else { | |
| 159b6efe | 863 | gv = MUTABLE_GV(sv); |
| a0d0e21e | 864 | } |
| ad64d0ec | 865 | sv = is_pp_rv2av ? MUTABLE_SV(GvAVn(gv)) : MUTABLE_SV(GvHVn(gv)); |
| 533c011a | 866 | if (PL_op->op_private & OPpLVAL_INTRO) |
| ad64d0ec | 867 | sv = is_pp_rv2av ? MUTABLE_SV(save_ary(gv)) : MUTABLE_SV(save_hash(gv)); |
| 9f527363 FC |
868 | } |
| 869 | if (PL_op->op_flags & OPf_REF) { | |
| 17ab7946 | 870 | SETs(sv); |
| a0d0e21e | 871 | RETURN; |
| 9f527363 FC |
872 | } |
| 873 | else if (PL_op->op_private & OPpMAYBE_LVSUB) { | |
| 40c94d11 FC |
874 | const I32 flags = is_lvalue_sub(); |
| 875 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
| cde874ca | 876 | if (gimme != G_ARRAY) |
| 042560a6 | 877 | goto croak_cant_return; |
| 17ab7946 | 878 | SETs(sv); |
| 78f9721b | 879 | RETURN; |
| 40c94d11 | 880 | } |
| a0d0e21e LW |
881 | } |
| 882 | ||
| 17ab7946 | 883 | if (is_pp_rv2av) { |
| 502c6561 | 884 | AV *const av = MUTABLE_AV(sv); |
| 486ec47a | 885 | /* The guts of pp_rv2av, with no intending change to preserve history |
| 17ab7946 NC |
886 | (until such time as we get tools that can do blame annotation across |
| 887 | whitespace changes. */ | |
| 96913b52 | 888 | if (gimme == G_ARRAY) { |
| d5524600 DM |
889 | SP--; |
| 890 | PUTBACK; | |
| 891 | S_pushav(aTHX_ av); | |
| 892 | SPAGAIN; | |
| 1c846c1f | 893 | } |
| 96913b52 VP |
894 | else if (gimme == G_SCALAR) { |
| 895 | dTARGET; | |
| 896 | const I32 maxarg = AvFILL(av) + 1; | |
| 897 | SETi(maxarg); | |
| 93965878 | 898 | } |
| 17ab7946 NC |
899 | } else { |
| 900 | /* The guts of pp_rv2hv */ | |
| 96913b52 VP |
901 | if (gimme == G_ARRAY) { /* array wanted */ |
| 902 | *PL_stack_sp = sv; | |
| 981b7185 | 903 | return Perl_do_kv(aTHX); |
| 96913b52 | 904 | } |
| c8fe3bdf | 905 | else if ((PL_op->op_private & OPpTRUEBOOL |
| adc42c31 | 906 | || ( PL_op->op_private & OPpMAYBE_TRUEBOOL |
| c8fe3bdf FC |
907 | && block_gimme() == G_VOID )) |
| 908 | && (!SvRMAGICAL(sv) || !mg_find(sv, PERL_MAGIC_tied))) | |
| 909 | SETs(HvUSEDKEYS(sv) ? &PL_sv_yes : sv_2mortal(newSViv(0))); | |
| 96913b52 VP |
910 | else if (gimme == G_SCALAR) { |
| 911 | dTARGET; | |
| 912 | TARG = Perl_hv_scalar(aTHX_ MUTABLE_HV(sv)); | |
| 913 | SPAGAIN; | |
| 914 | SETTARG; | |
| 915 | } | |
| 17ab7946 | 916 | } |
| be85d344 | 917 | RETURN; |
| 042560a6 NC |
918 | |
| 919 | croak_cant_return: | |
| 920 | Perl_croak(aTHX_ "Can't return %s to lvalue scalar context", | |
| 921 | is_pp_rv2av ? "array" : "hash"); | |
| 77e217c6 | 922 | RETURN; |
| a0d0e21e LW |
923 | } |
| 924 | ||
| 10c8fecd GS |
925 | STATIC void |
| 926 | S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem) | |
| 927 | { | |
| 97aff369 | 928 | dVAR; |
| 7918f24d NC |
929 | |
| 930 | PERL_ARGS_ASSERT_DO_ODDBALL; | |
| 931 | ||
| 10c8fecd GS |
932 | if (*relem) { |
| 933 | SV *tmpstr; | |
| b464bac0 | 934 | const HE *didstore; |
| 6d822dc4 MS |
935 | |
| 936 | if (ckWARN(WARN_MISC)) { | |
| a3b680e6 | 937 | const char *err; |
| 10c8fecd GS |
938 | if (relem == firstrelem && |
| 939 | SvROK(*relem) && | |
| 940 | (SvTYPE(SvRV(*relem)) == SVt_PVAV || | |
| 941 | SvTYPE(SvRV(*relem)) == SVt_PVHV)) | |
| 942 | { | |
| a3b680e6 | 943 | err = "Reference found where even-sized list expected"; |
| 10c8fecd GS |
944 | } |
| 945 | else | |
| a3b680e6 | 946 | err = "Odd number of elements in hash assignment"; |
| f1f66076 | 947 | Perl_warner(aTHX_ packWARN(WARN_MISC), "%s", err); |
| 10c8fecd | 948 | } |
| 6d822dc4 | 949 | |
| 561b68a9 | 950 | tmpstr = newSV(0); |
| 6d822dc4 MS |
951 | didstore = hv_store_ent(hash,*relem,tmpstr,0); |
| 952 | if (SvMAGICAL(hash)) { | |
| 953 | if (SvSMAGICAL(tmpstr)) | |
| 954 | mg_set(tmpstr); | |
| 955 | if (!didstore) | |
| 956 | sv_2mortal(tmpstr); | |
| 957 | } | |
| 958 | TAINT_NOT; | |
| 10c8fecd GS |
959 | } |
| 960 | } | |
| 961 | ||
| a0d0e21e LW |
962 | PP(pp_aassign) |
| 963 | { | |
| 27da23d5 | 964 | dVAR; dSP; |
| 3280af22 NIS |
965 | SV **lastlelem = PL_stack_sp; |
| 966 | SV **lastrelem = PL_stack_base + POPMARK; | |
| 967 | SV **firstrelem = PL_stack_base + POPMARK + 1; | |
| a0d0e21e LW |
968 | SV **firstlelem = lastrelem + 1; |
| 969 | ||
| eb578fdb KW |
970 | SV **relem; |
| 971 | SV **lelem; | |
| a0d0e21e | 972 | |
| eb578fdb KW |
973 | SV *sv; |
| 974 | AV *ary; | |
| a0d0e21e | 975 | |
| 54310121 | 976 | I32 gimme; |
| a0d0e21e LW |
977 | HV *hash; |
| 978 | I32 i; | |
| 979 | int magic; | |
| ca65944e | 980 | int duplicates = 0; |
| cbbf8932 | 981 | SV **firsthashrelem = NULL; /* "= 0" keeps gcc 2.95 quiet */ |
| 5637b936 | 982 | |
| 3280af22 | 983 | PL_delaymagic = DM_DELAY; /* catch simultaneous items */ |
| ca65944e | 984 | gimme = GIMME_V; |
| a0d0e21e LW |
985 | |
| 986 | /* If there's a common identifier on both sides we have to take | |
| 987 | * special care that assigning the identifier on the left doesn't | |
| 988 | * clobber a value on the right that's used later in the list. | |
| acdea6f0 | 989 | * Don't bother if LHS is just an empty hash or array. |
| a0d0e21e | 990 | */ |
| acdea6f0 DM |
991 | |
| 992 | if ( (PL_op->op_private & OPpASSIGN_COMMON) | |
| 993 | && ( | |
| 994 | firstlelem != lastlelem | |
| 995 | || ! ((sv = *firstlelem)) | |
| 996 | || SvMAGICAL(sv) | |
| 997 | || ! (SvTYPE(sv) == SVt_PVAV || SvTYPE(sv) == SVt_PVHV) | |
| 998 | || (SvTYPE(sv) == SVt_PVAV && AvFILL((AV*)sv) != -1) | |
| 1b95d04f | 999 | || (SvTYPE(sv) == SVt_PVHV && HvUSEDKEYS((HV*)sv) != 0) |
| acdea6f0 DM |
1000 | ) |
| 1001 | ) { | |
| cc5e57d2 | 1002 | EXTEND_MORTAL(lastrelem - firstrelem + 1); |
| 10c8fecd | 1003 | for (relem = firstrelem; relem <= lastrelem; relem++) { |
| 155aba94 | 1004 | if ((sv = *relem)) { |
| a1f49e72 | 1005 | TAINT_NOT; /* Each item is independent */ |
| 61e5f455 NC |
1006 | |
| 1007 | /* Dear TODO test in t/op/sort.t, I love you. | |
| 1008 | (It's relying on a panic, not a "semi-panic" from newSVsv() | |
| 1009 | and then an assertion failure below.) */ | |
| 1010 | if (SvIS_FREED(sv)) { | |
| 1011 | Perl_croak(aTHX_ "panic: attempt to copy freed scalar %p", | |
| 1012 | (void*)sv); | |
| 1013 | } | |
| 2203fb5a FC |
1014 | /* Not newSVsv(), as it does not allow copy-on-write, |
| 1015 | resulting in wasteful copies. We need a second copy of | |
| 1016 | a temp here, hence the SV_NOSTEAL. */ | |
| 1017 | *relem = sv_mortalcopy_flags(sv,SV_GMAGIC|SV_DO_COW_SVSETSV | |
| 1018 | |SV_NOSTEAL); | |
| a1f49e72 | 1019 | } |
| 10c8fecd | 1020 | } |
| a0d0e21e LW |
1021 | } |
| 1022 | ||
| 1023 | relem = firstrelem; | |
| 1024 | lelem = firstlelem; | |
| 4608196e RGS |
1025 | ary = NULL; |
| 1026 | hash = NULL; | |
| 10c8fecd | 1027 | |
| a0d0e21e | 1028 | while (lelem <= lastlelem) { |
| bbce6d69 | 1029 | TAINT_NOT; /* Each item stands on its own, taintwise. */ |
| a0d0e21e LW |
1030 | sv = *lelem++; |
| 1031 | switch (SvTYPE(sv)) { | |
| 1032 | case SVt_PVAV: | |
| 60edcf09 | 1033 | ary = MUTABLE_AV(sv); |
| 748a9306 | 1034 | magic = SvMAGICAL(ary) != 0; |
| 60edcf09 FC |
1035 | ENTER; |
| 1036 | SAVEFREESV(SvREFCNT_inc_simple_NN(sv)); | |
| a0d0e21e | 1037 | av_clear(ary); |
| 7e42bd57 | 1038 | av_extend(ary, lastrelem - relem); |
| a0d0e21e LW |
1039 | i = 0; |
| 1040 | while (relem <= lastrelem) { /* gobble up all the rest */ | |
| 5117ca91 | 1041 | SV **didstore; |
| a0d0e21e | 1042 | assert(*relem); |
| 18024492 FC |
1043 | SvGETMAGIC(*relem); /* before newSV, in case it dies */ |
| 1044 | sv = newSV(0); | |
| 1045 | sv_setsv_nomg(sv, *relem); | |
| a0d0e21e | 1046 | *(relem++) = sv; |
| 5117ca91 GS |
1047 | didstore = av_store(ary,i++,sv); |
| 1048 | if (magic) { | |
| 18024492 FC |
1049 | if (!didstore) |
| 1050 | sv_2mortal(sv); | |
| 8ef24240 | 1051 | if (SvSMAGICAL(sv)) |
| fb73857a | 1052 | mg_set(sv); |
| 5117ca91 | 1053 | } |
| bbce6d69 | 1054 | TAINT_NOT; |
| a0d0e21e | 1055 | } |
| 354b0578 | 1056 | if (PL_delaymagic & DM_ARRAY_ISA) |
| ad64d0ec | 1057 | SvSETMAGIC(MUTABLE_SV(ary)); |
| 60edcf09 | 1058 | LEAVE; |
| a0d0e21e | 1059 | break; |
| 10c8fecd | 1060 | case SVt_PVHV: { /* normal hash */ |
| a0d0e21e | 1061 | SV *tmpstr; |
| 45960564 | 1062 | SV** topelem = relem; |
| a0d0e21e | 1063 | |
| 60edcf09 | 1064 | hash = MUTABLE_HV(sv); |
| 748a9306 | 1065 | magic = SvMAGICAL(hash) != 0; |
| 60edcf09 FC |
1066 | ENTER; |
| 1067 | SAVEFREESV(SvREFCNT_inc_simple_NN(sv)); | |
| a0d0e21e | 1068 | hv_clear(hash); |
| ca65944e | 1069 | firsthashrelem = relem; |
| a0d0e21e LW |
1070 | |
| 1071 | while (relem < lastrelem) { /* gobble up all the rest */ | |
| 5117ca91 | 1072 | HE *didstore; |
| 6136c704 AL |
1073 | sv = *relem ? *relem : &PL_sv_no; |
| 1074 | relem++; | |
| 9c744f4f | 1075 | tmpstr = sv_newmortal(); |
| a0d0e21e LW |
1076 | if (*relem) |
| 1077 | sv_setsv(tmpstr,*relem); /* value */ | |
| 45960564 DM |
1078 | relem++; |
| 1079 | if (gimme != G_VOID) { | |
| 1080 | if (hv_exists_ent(hash, sv, 0)) | |
| 1081 | /* key overwrites an existing entry */ | |
| 1082 | duplicates += 2; | |
| 1083 | else | |
| 1084 | if (gimme == G_ARRAY) { | |
| 1085 | /* copy element back: possibly to an earlier | |
| 1086 | * stack location if we encountered dups earlier */ | |
| 1087 | *topelem++ = sv; | |
| 1088 | *topelem++ = tmpstr; | |
| 1089 | } | |
| 1090 | } | |
| 5117ca91 | 1091 | didstore = hv_store_ent(hash,sv,tmpstr,0); |
| 9c744f4f | 1092 | if (didstore) SvREFCNT_inc_simple_void_NN(tmpstr); |
| 5117ca91 | 1093 | if (magic) { |
| 8ef24240 | 1094 | if (SvSMAGICAL(tmpstr)) |
| fb73857a | 1095 | mg_set(tmpstr); |
| 5117ca91 | 1096 | } |
| bbce6d69 | 1097 | TAINT_NOT; |
| 8e07c86e | 1098 | } |
| 6a0deba8 | 1099 | if (relem == lastrelem) { |
| 10c8fecd | 1100 | do_oddball(hash, relem, firstrelem); |
| 6a0deba8 | 1101 | relem++; |
| 1930e939 | 1102 | } |
| 60edcf09 | 1103 | LEAVE; |
| a0d0e21e LW |
1104 | } |
| 1105 | break; | |
| 1106 | default: | |
| 6fc92669 GS |
1107 | if (SvIMMORTAL(sv)) { |
| 1108 | if (relem <= lastrelem) | |
| 1109 | relem++; | |
| 1110 | break; | |
| a0d0e21e LW |
1111 | } |
| 1112 | if (relem <= lastrelem) { | |
| 1c70fb82 FC |
1113 | if ( |
| 1114 | SvTEMP(sv) && !SvSMAGICAL(sv) && SvREFCNT(sv) == 1 && | |
| 1115 | (!isGV_with_GP(sv) || SvFAKE(sv)) && ckWARN(WARN_MISC) | |
| 1116 | ) | |
| 1117 | Perl_warner(aTHX_ | |
| 1118 | packWARN(WARN_MISC), | |
| 1119 | "Useless assignment to a temporary" | |
| 1120 | ); | |
| a0d0e21e LW |
1121 | sv_setsv(sv, *relem); |
| 1122 | *(relem++) = sv; | |
| 1123 | } | |
| 1124 | else | |
| 3280af22 | 1125 | sv_setsv(sv, &PL_sv_undef); |
| 8ef24240 | 1126 | SvSETMAGIC(sv); |
| a0d0e21e LW |
1127 | break; |
| 1128 | } | |
| 1129 | } | |
| 3280af22 | 1130 | if (PL_delaymagic & ~DM_DELAY) { |
| 985213f2 AB |
1131 | /* Will be used to set PL_tainting below */ |
| 1132 | UV tmp_uid = PerlProc_getuid(); | |
| 1133 | UV tmp_euid = PerlProc_geteuid(); | |
| 1134 | UV tmp_gid = PerlProc_getgid(); | |
| 1135 | UV tmp_egid = PerlProc_getegid(); | |
| 1136 | ||
| 3280af22 | 1137 | if (PL_delaymagic & DM_UID) { |
| a0d0e21e | 1138 | #ifdef HAS_SETRESUID |
| 985213f2 AB |
1139 | (void)setresuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, |
| 1140 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1, | |
| fb934a90 | 1141 | (Uid_t)-1); |
| 56febc5e AD |
1142 | #else |
| 1143 | # ifdef HAS_SETREUID | |
| 985213f2 AB |
1144 | (void)setreuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, |
| 1145 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1); | |
| 56febc5e AD |
1146 | # else |
| 1147 | # ifdef HAS_SETRUID | |
| b28d0864 | 1148 | if ((PL_delaymagic & DM_UID) == DM_RUID) { |
| 985213f2 | 1149 | (void)setruid(PL_delaymagic_uid); |
| b28d0864 | 1150 | PL_delaymagic &= ~DM_RUID; |
| a0d0e21e | 1151 | } |
| 56febc5e AD |
1152 | # endif /* HAS_SETRUID */ |
| 1153 | # ifdef HAS_SETEUID | |
| b28d0864 | 1154 | if ((PL_delaymagic & DM_UID) == DM_EUID) { |
| 985213f2 | 1155 | (void)seteuid(PL_delaymagic_euid); |
| b28d0864 | 1156 | PL_delaymagic &= ~DM_EUID; |
| a0d0e21e | 1157 | } |
| 56febc5e | 1158 | # endif /* HAS_SETEUID */ |
| b28d0864 | 1159 | if (PL_delaymagic & DM_UID) { |
| 985213f2 | 1160 | if (PL_delaymagic_uid != PL_delaymagic_euid) |
| cea2e8a9 | 1161 | DIE(aTHX_ "No setreuid available"); |
| 985213f2 | 1162 | (void)PerlProc_setuid(PL_delaymagic_uid); |
| a0d0e21e | 1163 | } |
| 56febc5e AD |
1164 | # endif /* HAS_SETREUID */ |
| 1165 | #endif /* HAS_SETRESUID */ | |
| 985213f2 AB |
1166 | tmp_uid = PerlProc_getuid(); |
| 1167 | tmp_euid = PerlProc_geteuid(); | |
| a0d0e21e | 1168 | } |
| 3280af22 | 1169 | if (PL_delaymagic & DM_GID) { |
| a0d0e21e | 1170 | #ifdef HAS_SETRESGID |
| 985213f2 AB |
1171 | (void)setresgid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, |
| 1172 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1, | |
| fb934a90 | 1173 | (Gid_t)-1); |
| 56febc5e AD |
1174 | #else |
| 1175 | # ifdef HAS_SETREGID | |
| 985213f2 AB |
1176 | (void)setregid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, |
| 1177 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1); | |
| 56febc5e AD |
1178 | # else |
| 1179 | # ifdef HAS_SETRGID | |
| b28d0864 | 1180 | if ((PL_delaymagic & DM_GID) == DM_RGID) { |
| 985213f2 | 1181 | (void)setrgid(PL_delaymagic_gid); |
| b28d0864 | 1182 | PL_delaymagic &= ~DM_RGID; |
| a0d0e21e | 1183 | } |
| 56febc5e AD |
1184 | # endif /* HAS_SETRGID */ |
| 1185 | # ifdef HAS_SETEGID | |
| b28d0864 | 1186 | if ((PL_delaymagic & DM_GID) == DM_EGID) { |
| 985213f2 | 1187 | (void)setegid(PL_delaymagic_egid); |
| b28d0864 | 1188 | PL_delaymagic &= ~DM_EGID; |
| a0d0e21e | 1189 | } |
| 56febc5e | 1190 | # endif /* HAS_SETEGID */ |
| b28d0864 | 1191 | if (PL_delaymagic & DM_GID) { |
| 985213f2 | 1192 | if (PL_delaymagic_gid != PL_delaymagic_egid) |
| cea2e8a9 | 1193 | DIE(aTHX_ "No setregid available"); |
| 985213f2 | 1194 | (void)PerlProc_setgid(PL_delaymagic_gid); |
| a0d0e21e | 1195 | } |
| 56febc5e AD |
1196 | # endif /* HAS_SETREGID */ |
| 1197 | #endif /* HAS_SETRESGID */ | |
| 985213f2 AB |
1198 | tmp_gid = PerlProc_getgid(); |
| 1199 | tmp_egid = PerlProc_getegid(); | |
| a0d0e21e | 1200 | } |
| 284167a5 | 1201 | TAINTING_set( TAINTING_get | (tmp_uid && (tmp_euid != tmp_uid || tmp_egid != tmp_gid)) ); |
| a0d0e21e | 1202 | } |
| 3280af22 | 1203 | PL_delaymagic = 0; |
| 54310121 | 1204 | |
| 54310121 | 1205 | if (gimme == G_VOID) |
| 1206 | SP = firstrelem - 1; | |
| 1207 | else if (gimme == G_SCALAR) { | |
| 1208 | dTARGET; | |
| 1209 | SP = firstrelem; | |
| ca65944e | 1210 | SETi(lastrelem - firstrelem + 1 - duplicates); |
| 54310121 | 1211 | } |
| 1212 | else { | |
| ca65944e | 1213 | if (ary) |
| a0d0e21e | 1214 | SP = lastrelem; |
| ca65944e RGS |
1215 | else if (hash) { |
| 1216 | if (duplicates) { | |
| 45960564 DM |
1217 | /* at this point we have removed the duplicate key/value |
| 1218 | * pairs from the stack, but the remaining values may be | |
| 1219 | * wrong; i.e. with (a 1 a 2 b 3) on the stack we've removed | |
| 1220 | * the (a 2), but the stack now probably contains | |
| 1221 | * (a <freed> b 3), because { hv_save(a,1); hv_save(a,2) } | |
| 1222 | * obliterates the earlier key. So refresh all values. */ | |
| ca65944e | 1223 | lastrelem -= duplicates; |
| 45960564 DM |
1224 | relem = firsthashrelem; |
| 1225 | while (relem < lastrelem) { | |
| 1226 | HE *he; | |
| 1227 | sv = *relem++; | |
| 1228 | he = hv_fetch_ent(hash, sv, 0, 0); | |
| 1229 | *relem++ = (he ? HeVAL(he) : &PL_sv_undef); | |
| 1230 | } | |
| ca65944e RGS |
1231 | } |
| 1232 | SP = lastrelem; | |
| 1233 | } | |
| a0d0e21e LW |
1234 | else |
| 1235 | SP = firstrelem + (lastlelem - firstlelem); | |
| 0c8c7a05 | 1236 | lelem = firstlelem + (relem - firstrelem); |
| 5f05dabc | 1237 | while (relem <= SP) |
| 3280af22 | 1238 | *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef; |
| a0d0e21e | 1239 | } |
| 08aeb9f7 | 1240 | |
| 54310121 | 1241 | RETURN; |
| a0d0e21e LW |
1242 | } |
| 1243 | ||
| 8782bef2 GB |
1244 | PP(pp_qr) |
| 1245 | { | |
| 97aff369 | 1246 | dVAR; dSP; |
| eb578fdb | 1247 | PMOP * const pm = cPMOP; |
| fe578d7f | 1248 | REGEXP * rx = PM_GETRE(pm); |
| 10599a69 | 1249 | SV * const pkg = rx ? CALLREG_PACKAGE(rx) : NULL; |
| c4420975 | 1250 | SV * const rv = sv_newmortal(); |
| d63c20f2 DM |
1251 | CV **cvp; |
| 1252 | CV *cv; | |
| 288b8c02 NC |
1253 | |
| 1254 | SvUPGRADE(rv, SVt_IV); | |
| c2123ae3 NC |
1255 | /* For a subroutine describing itself as "This is a hacky workaround" I'm |
| 1256 | loathe to use it here, but it seems to be the right fix. Or close. | |
| 1257 | The key part appears to be that it's essential for pp_qr to return a new | |
| 1258 | object (SV), which implies that there needs to be an effective way to | |
| 1259 | generate a new SV from the existing SV that is pre-compiled in the | |
| 1260 | optree. */ | |
| 1261 | SvRV_set(rv, MUTABLE_SV(reg_temp_copy(NULL, rx))); | |
| 288b8c02 NC |
1262 | SvROK_on(rv); |
| 1263 | ||
| 8d919b0a | 1264 | cvp = &( ReANY((REGEXP *)SvRV(rv))->qr_anoncv); |
| d63c20f2 DM |
1265 | if ((cv = *cvp) && CvCLONE(*cvp)) { |
| 1266 | *cvp = cv_clone(cv); | |
| 1267 | SvREFCNT_dec(cv); | |
| 1268 | } | |
| 1269 | ||
| 288b8c02 | 1270 | if (pkg) { |
| f815daf2 | 1271 | HV *const stash = gv_stashsv(pkg, GV_ADD); |
| a954f6ee | 1272 | SvREFCNT_dec(pkg); |
| 288b8c02 NC |
1273 | (void)sv_bless(rv, stash); |
| 1274 | } | |
| 1275 | ||
| 284167a5 | 1276 | if (RX_ISTAINTED(rx)) { |
| e08e52cf | 1277 | SvTAINTED_on(rv); |
| 9274aefd DM |
1278 | SvTAINTED_on(SvRV(rv)); |
| 1279 | } | |
| c8c13c22 JB |
1280 | XPUSHs(rv); |
| 1281 | RETURN; | |
| 8782bef2 GB |
1282 | } |
| 1283 | ||
| a0d0e21e LW |
1284 | PP(pp_match) |
| 1285 | { | |
| 97aff369 | 1286 | dVAR; dSP; dTARG; |
| eb578fdb | 1287 | PMOP *pm = cPMOP; |
| d65afb4b | 1288 | PMOP *dynpm = pm; |
| eb578fdb KW |
1289 | const char *t; |
| 1290 | const char *s; | |
| 5c144d81 | 1291 | const char *strend; |
| a0d0e21e | 1292 | I32 global; |
| 1ed74d04 | 1293 | U8 r_flags = REXEC_CHECKED; |
| 5c144d81 | 1294 | const char *truebase; /* Start of string */ |
| eb578fdb | 1295 | REGEXP *rx = PM_GETRE(pm); |
| b3eb6a9b | 1296 | bool rxtainted; |
| a3b680e6 | 1297 | const I32 gimme = GIMME; |
| a0d0e21e | 1298 | STRLEN len; |
| 748a9306 | 1299 | I32 minmatch = 0; |
| a3b680e6 | 1300 | const I32 oldsave = PL_savestack_ix; |
| f86702cc | 1301 | I32 update_minmatch = 1; |
| e60df1fa | 1302 | I32 had_zerolen = 0; |
| 58e23c8d | 1303 | U32 gpos = 0; |
| a0d0e21e | 1304 | |
| 533c011a | 1305 | if (PL_op->op_flags & OPf_STACKED) |
| a0d0e21e | 1306 | TARG = POPs; |
| 59f00321 RGS |
1307 | else if (PL_op->op_private & OPpTARGET_MY) |
| 1308 | GETTARGET; | |
| a0d0e21e | 1309 | else { |
| 54b9620d | 1310 | TARG = DEFSV; |
| a0d0e21e LW |
1311 | EXTEND(SP,1); |
| 1312 | } | |
| d9f424b2 | 1313 | |
| c277df42 | 1314 | PUTBACK; /* EVAL blocks need stack_sp. */ |
| 69dc4b30 FC |
1315 | /* Skip get-magic if this is a qr// clone, because regcomp has |
| 1316 | already done it. */ | |
| 8d919b0a | 1317 | s = ReANY(rx)->mother_re |
| 69dc4b30 FC |
1318 | ? SvPV_nomg_const(TARG, len) |
| 1319 | : SvPV_const(TARG, len); | |
| a0d0e21e | 1320 | if (!s) |
| 2269b42e | 1321 | DIE(aTHX_ "panic: pp_match"); |
| 890ce7af | 1322 | strend = s + len; |
| 284167a5 S |
1323 | rxtainted = (RX_ISTAINTED(rx) || |
| 1324 | (TAINT_get && (pm->op_pmflags & PMf_RETAINT))); | |
| 9212bbba | 1325 | TAINT_NOT; |
| a0d0e21e | 1326 | |
| a30b2f1f | 1327 | RX_MATCH_UTF8_set(rx, DO_UTF8(TARG)); |
| d9f424b2 | 1328 | |
| d65afb4b | 1329 | /* PMdf_USED is set after a ?? matches once */ |
| c737faaf YO |
1330 | if ( |
| 1331 | #ifdef USE_ITHREADS | |
| 1332 | SvREADONLY(PL_regex_pad[pm->op_pmoffset]) | |
| 1333 | #else | |
| 1334 | pm->op_pmflags & PMf_USED | |
| 1335 | #endif | |
| 1336 | ) { | |
| e5dc5375 | 1337 | DEBUG_r(PerlIO_printf(Perl_debug_log, "?? already matched once")); |
| c277df42 | 1338 | failure: |
| e5dc5375 | 1339 | |
| a0d0e21e LW |
1340 | if (gimme == G_ARRAY) |
| 1341 | RETURN; | |
| 1342 | RETPUSHNO; | |
| 1343 | } | |
| 1344 | ||
| c737faaf YO |
1345 | |
| 1346 | ||
| 7e313637 FC |
1347 | /* empty pattern special-cased to use last successful pattern if |
| 1348 | possible, except for qr// */ | |
| 8d919b0a | 1349 | if (!ReANY(rx)->mother_re && !RX_PRELEN(rx) |
| 7e313637 | 1350 | && PL_curpm) { |
| 3280af22 | 1351 | pm = PL_curpm; |
| aaa362c4 | 1352 | rx = PM_GETRE(pm); |
| a0d0e21e | 1353 | } |
| d65afb4b | 1354 | |
| e5dc5375 KW |
1355 | if (RX_MINLEN(rx) > (I32)len) { |
| 1356 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String shorter than min possible regex match\n")); | |
| d65afb4b | 1357 | goto failure; |
| e5dc5375 | 1358 | } |
| c277df42 | 1359 | |
| a0d0e21e | 1360 | truebase = t = s; |
| ad94a511 IZ |
1361 | |
| 1362 | /* XXXX What part of this is needed with true \G-support? */ | |
| d65afb4b | 1363 | if ((global = dynpm->op_pmflags & PMf_GLOBAL)) { |
| 07bc277f | 1364 | RX_OFFS(rx)[0].start = -1; |
| a0d0e21e | 1365 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) { |
| c445ea15 | 1366 | MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global); |
| 565764a8 | 1367 | if (mg && mg->mg_len >= 0) { |
| 07bc277f NC |
1368 | if (!(RX_EXTFLAGS(rx) & RXf_GPOS_SEEN)) |
| 1369 | RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len; | |
| 1370 | else if (RX_EXTFLAGS(rx) & RXf_ANCH_GPOS) { | |
| 0ef3e39e | 1371 | r_flags |= REXEC_IGNOREPOS; |
| 07bc277f NC |
1372 | RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len; |
| 1373 | } else if (RX_EXTFLAGS(rx) & RXf_GPOS_FLOAT) | |
| 58e23c8d YO |
1374 | gpos = mg->mg_len; |
| 1375 | else | |
| 07bc277f NC |
1376 | RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len; |
| 1377 | minmatch = (mg->mg_flags & MGf_MINMATCH) ? RX_GOFS(rx) + 1 : 0; | |
| f86702cc | 1378 | update_minmatch = 0; |
| 748a9306 | 1379 | } |
| a0d0e21e LW |
1380 | } |
| 1381 | } | |
| a41aa44d | 1382 | if ( RX_NPARENS(rx) |
| 6502e081 | 1383 | || PL_sawampersand |
| 6502e081 DM |
1384 | || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
| 1385 | ) { | |
| 1386 | r_flags |= (REXEC_COPY_STR|REXEC_COPY_SKIP_PRE); | |
| 1387 | /* in @a =~ /(.)/g, we iterate multiple times, but copy the buffer | |
| 1388 | * only on the first iteration. Therefore we need to copy $' as well | |
| 1389 | * as $&, to make the rest of the string available for captures in | |
| 1390 | * subsequent iterations */ | |
| 1391 | if (! (global && gimme == G_ARRAY)) | |
| 1392 | r_flags |= REXEC_COPY_SKIP_POST; | |
| 1393 | }; | |
| 22e551b9 | 1394 | |
| d7be1480 | 1395 | play_it_again: |
| 07bc277f NC |
1396 | if (global && RX_OFFS(rx)[0].start != -1) { |
| 1397 | t = s = RX_OFFS(rx)[0].end + truebase - RX_GOFS(rx); | |
| e5dc5375 KW |
1398 | if ((s + RX_MINLEN(rx)) > strend || s < truebase) { |
| 1399 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Regex match can't succeed, so not even tried\n")); | |
| a0d0e21e | 1400 | goto nope; |
| e5dc5375 | 1401 | } |
| f86702cc | 1402 | if (update_minmatch++) |
| e60df1fa | 1403 | minmatch = had_zerolen; |
| a0d0e21e | 1404 | } |
| 07bc277f | 1405 | if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT && |
| 3c8556c3 | 1406 | DO_UTF8(TARG) == (RX_UTF8(rx) != 0)) { |
| 5c144d81 NC |
1407 | /* FIXME - can PL_bostr be made const char *? */ |
| 1408 | PL_bostr = (char *)truebase; | |
| f9f4320a | 1409 | s = CALLREG_INTUIT_START(rx, TARG, (char *)s, (char *)strend, r_flags, NULL); |
| f722798b IZ |
1410 | |
| 1411 | if (!s) | |
| 1412 | goto nope; | |
| 07bc277f | 1413 | if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL) |
| 14977893 | 1414 | && !PL_sawampersand |
| 07bc277f | 1415 | && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) |
| 05b4157f | 1416 | && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */ |
| f722798b | 1417 | goto yup; |
| a0d0e21e | 1418 | } |
| 77da2310 NC |
1419 | if (!CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase, |
| 1420 | minmatch, TARG, NUM2PTR(void*, gpos), r_flags)) | |
| 1421 | goto ret_no; | |
| 1422 | ||
| 1423 | PL_curpm = pm; | |
| 1424 | if (dynpm->op_pmflags & PMf_ONCE) { | |
| c737faaf | 1425 | #ifdef USE_ITHREADS |
| 77da2310 | 1426 | SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]); |
| c737faaf | 1427 | #else |
| 77da2310 | 1428 | dynpm->op_pmflags |= PMf_USED; |
| c737faaf | 1429 | #endif |
| a0d0e21e | 1430 | } |
| a0d0e21e LW |
1431 | |
| 1432 | gotcha: | |
| 72311751 GS |
1433 | if (rxtainted) |
| 1434 | RX_MATCH_TAINTED_on(rx); | |
| 1435 | TAINT_IF(RX_MATCH_TAINTED(rx)); | |
| a0d0e21e | 1436 | if (gimme == G_ARRAY) { |
| 07bc277f | 1437 | const I32 nparens = RX_NPARENS(rx); |
| a3b680e6 | 1438 | I32 i = (global && !nparens) ? 1 : 0; |
| a0d0e21e | 1439 | |
| c277df42 | 1440 | SPAGAIN; /* EVAL blocks could move the stack. */ |
| ffc61ed2 JH |
1441 | EXTEND(SP, nparens + i); |
| 1442 | EXTEND_MORTAL(nparens + i); | |
| 1443 | for (i = !i; i <= nparens; i++) { | |
| a0d0e21e | 1444 | PUSHs(sv_newmortal()); |
| 07bc277f NC |
1445 | if ((RX_OFFS(rx)[i].start != -1) && RX_OFFS(rx)[i].end != -1 ) { |
| 1446 | const I32 len = RX_OFFS(rx)[i].end - RX_OFFS(rx)[i].start; | |
| 1447 | s = RX_OFFS(rx)[i].start + truebase; | |
| 1448 | if (RX_OFFS(rx)[i].end < 0 || RX_OFFS(rx)[i].start < 0 || | |
| 290deeac | 1449 | len < 0 || len > strend - s) |
| 5637ef5b NC |
1450 | DIE(aTHX_ "panic: pp_match start/end pointers, i=%ld, " |
| 1451 | "start=%ld, end=%ld, s=%p, strend=%p, len=%"UVuf, | |
| 1452 | (long) i, (long) RX_OFFS(rx)[i].start, | |
| 1453 | (long)RX_OFFS(rx)[i].end, s, strend, (UV) len); | |
| a0d0e21e | 1454 | sv_setpvn(*SP, s, len); |
| cce850e4 | 1455 | if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len)) |
| a197cbdd | 1456 | SvUTF8_on(*SP); |
| a0d0e21e LW |
1457 | } |
| 1458 | } | |
| 1459 | if (global) { | |
| d65afb4b | 1460 | if (dynpm->op_pmflags & PMf_CONTINUE) { |
| 6136c704 | 1461 | MAGIC* mg = NULL; |
| 0af80b60 HS |
1462 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) |
| 1463 | mg = mg_find(TARG, PERL_MAGIC_regex_global); | |
| 1464 | if (!mg) { | |
| d83f0a82 NC |
1465 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 1466 | if (SvIsCOW(TARG)) | |
| 1467 | sv_force_normal_flags(TARG, 0); | |
| 1468 | #endif | |
| 1469 | mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global, | |
| 1470 | &PL_vtbl_mglob, NULL, 0); | |
| 0af80b60 | 1471 | } |
| 07bc277f NC |
1472 | if (RX_OFFS(rx)[0].start != -1) { |
| 1473 | mg->mg_len = RX_OFFS(rx)[0].end; | |
| 1474 | if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end) | |
| 0af80b60 HS |
1475 | mg->mg_flags |= MGf_MINMATCH; |
| 1476 | else | |
| 1477 | mg->mg_flags &= ~MGf_MINMATCH; | |
| 1478 | } | |
| 1479 | } | |
| 07bc277f NC |
1480 | had_zerolen = (RX_OFFS(rx)[0].start != -1 |
| 1481 | && (RX_OFFS(rx)[0].start + RX_GOFS(rx) | |
| 1482 | == (UV)RX_OFFS(rx)[0].end)); | |
| c277df42 | 1483 | PUTBACK; /* EVAL blocks may use stack */ |
| cf93c79d | 1484 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
| a0d0e21e LW |
1485 | goto play_it_again; |
| 1486 | } | |
| ffc61ed2 | 1487 | else if (!nparens) |
| bde848c5 | 1488 | XPUSHs(&PL_sv_yes); |
| 4633a7c4 | 1489 | LEAVE_SCOPE(oldsave); |
| a0d0e21e LW |
1490 | RETURN; |
| 1491 | } | |
| 1492 | else { | |
| 1493 | if (global) { | |
| cbbf8932 | 1494 | MAGIC* mg; |
| a0d0e21e | 1495 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) |
| 14befaf4 | 1496 | mg = mg_find(TARG, PERL_MAGIC_regex_global); |
| cbbf8932 AL |
1497 | else |
| 1498 | mg = NULL; | |
| a0d0e21e | 1499 | if (!mg) { |
| d83f0a82 NC |
1500 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 1501 | if (SvIsCOW(TARG)) | |
| 1502 | sv_force_normal_flags(TARG, 0); | |
| 1503 | #endif | |
| 1504 | mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global, | |
| 1505 | &PL_vtbl_mglob, NULL, 0); | |
| a0d0e21e | 1506 | } |
| 07bc277f NC |
1507 | if (RX_OFFS(rx)[0].start != -1) { |
| 1508 | mg->mg_len = RX_OFFS(rx)[0].end; | |
| 1509 | if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end) | |
| 748a9306 LW |
1510 | mg->mg_flags |= MGf_MINMATCH; |
| 1511 | else | |
| 1512 | mg->mg_flags &= ~MGf_MINMATCH; | |
| 1513 | } | |
| a0d0e21e | 1514 | } |
| 4633a7c4 | 1515 | LEAVE_SCOPE(oldsave); |
| a0d0e21e LW |
1516 | RETPUSHYES; |
| 1517 | } | |
| 1518 | ||
| f722798b | 1519 | yup: /* Confirmed by INTUIT */ |
| 72311751 GS |
1520 | if (rxtainted) |
| 1521 | RX_MATCH_TAINTED_on(rx); | |
| 1522 | TAINT_IF(RX_MATCH_TAINTED(rx)); | |
| 3280af22 | 1523 | PL_curpm = pm; |
| c737faaf YO |
1524 | if (dynpm->op_pmflags & PMf_ONCE) { |
| 1525 | #ifdef USE_ITHREADS | |
| 1526 | SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]); | |
| 1527 | #else | |
| 1528 | dynpm->op_pmflags |= PMf_USED; | |
| 1529 | #endif | |
| 1530 | } | |
| cf93c79d | 1531 | if (RX_MATCH_COPIED(rx)) |
| 07bc277f | 1532 | Safefree(RX_SUBBEG(rx)); |
| cf93c79d | 1533 | RX_MATCH_COPIED_off(rx); |
| 07bc277f | 1534 | RX_SUBBEG(rx) = NULL; |
| a0d0e21e | 1535 | if (global) { |
| 5c144d81 | 1536 | /* FIXME - should rx->subbeg be const char *? */ |
| 07bc277f | 1537 | RX_SUBBEG(rx) = (char *) truebase; |
| 6502e081 DM |
1538 | RX_SUBOFFSET(rx) = 0; |
| 1539 | RX_SUBCOFFSET(rx) = 0; | |
| 07bc277f | 1540 | RX_OFFS(rx)[0].start = s - truebase; |
| a30b2f1f | 1541 | if (RX_MATCH_UTF8(rx)) { |
| 07bc277f NC |
1542 | char * const t = (char*)utf8_hop((U8*)s, RX_MINLENRET(rx)); |
| 1543 | RX_OFFS(rx)[0].end = t - truebase; | |
| 60aeb6fd NIS |
1544 | } |
| 1545 | else { | |
| 07bc277f | 1546 | RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx); |
| 60aeb6fd | 1547 | } |
| 07bc277f | 1548 | RX_SUBLEN(rx) = strend - truebase; |
| a0d0e21e | 1549 | goto gotcha; |
| 1c846c1f | 1550 | } |
| 07bc277f | 1551 | if (PL_sawampersand || RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) { |
| 14977893 | 1552 | I32 off; |
| f8c7b90f | 1553 | #ifdef PERL_OLD_COPY_ON_WRITE |
| ed252734 NC |
1554 | if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) { |
| 1555 | if (DEBUG_C_TEST) { | |
| 1556 | PerlIO_printf(Perl_debug_log, | |
| 1557 | "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n", | |
| 6c9570dc | 1558 | (int) SvTYPE(TARG), (void*)truebase, (void*)t, |
| ed252734 NC |
1559 | (int)(t-truebase)); |
| 1560 | } | |
| bdd9a1b1 NC |
1561 | RX_SAVED_COPY(rx) = sv_setsv_cow(RX_SAVED_COPY(rx), TARG); |
| 1562 | RX_SUBBEG(rx) | |
| 1563 | = (char *) SvPVX_const(RX_SAVED_COPY(rx)) + (t - truebase); | |
| 1564 | assert (SvPOKp(RX_SAVED_COPY(rx))); | |
| ed252734 NC |
1565 | } else |
| 1566 | #endif | |
| 1567 | { | |
| 14977893 | 1568 | |
| 07bc277f | 1569 | RX_SUBBEG(rx) = savepvn(t, strend - t); |
| f8c7b90f | 1570 | #ifdef PERL_OLD_COPY_ON_WRITE |
| bdd9a1b1 | 1571 | RX_SAVED_COPY(rx) = NULL; |
| ed252734 NC |
1572 | #endif |
| 1573 | } | |
| 07bc277f | 1574 | RX_SUBLEN(rx) = strend - t; |
| 6502e081 DM |
1575 | RX_SUBOFFSET(rx) = 0; |
| 1576 | RX_SUBCOFFSET(rx) = 0; | |
| 14977893 | 1577 | RX_MATCH_COPIED_on(rx); |
| 07bc277f NC |
1578 | off = RX_OFFS(rx)[0].start = s - t; |
| 1579 | RX_OFFS(rx)[0].end = off + RX_MINLENRET(rx); | |
| 14977893 JH |
1580 | } |
| 1581 | else { /* startp/endp are used by @- @+. */ | |
| 07bc277f NC |
1582 | RX_OFFS(rx)[0].start = s - truebase; |
| 1583 | RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx); | |
| 14977893 | 1584 | } |
| 7e1a2c8d DM |
1585 | /* match via INTUIT shouldn't have any captures. Let @-, @+, $^N know */ |
| 1586 | assert(!RX_NPARENS(rx)); | |
| 1587 | RX_LASTPAREN(rx) = RX_LASTCLOSEPAREN(rx) = 0; | |
| 4633a7c4 | 1588 | LEAVE_SCOPE(oldsave); |
| a0d0e21e LW |
1589 | RETPUSHYES; |
| 1590 | ||
| 1591 | nope: | |
| a0d0e21e | 1592 | ret_no: |
| d65afb4b | 1593 | if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) { |
| a0d0e21e | 1594 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) { |
| 6136c704 | 1595 | MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global); |
| a0d0e21e | 1596 | if (mg) |
| 565764a8 | 1597 | mg->mg_len = -1; |
| a0d0e21e LW |
1598 | } |
| 1599 | } | |
| 4633a7c4 | 1600 | LEAVE_SCOPE(oldsave); |
| a0d0e21e LW |
1601 | if (gimme == G_ARRAY) |
| 1602 | RETURN; | |
| 1603 | RETPUSHNO; | |
| 1604 | } | |
| 1605 | ||
| 1606 | OP * | |
| 864dbfa3 | 1607 | Perl_do_readline(pTHX) |
| a0d0e21e | 1608 | { |
| 27da23d5 | 1609 | dVAR; dSP; dTARGETSTACKED; |
| eb578fdb | 1610 | SV *sv; |
| a0d0e21e LW |
1611 | STRLEN tmplen = 0; |
| 1612 | STRLEN offset; | |
| 760ac839 | 1613 | PerlIO *fp; |
| eb578fdb KW |
1614 | IO * const io = GvIO(PL_last_in_gv); |
| 1615 | const I32 type = PL_op->op_type; | |
| a3b680e6 | 1616 | const I32 gimme = GIMME_V; |
| a0d0e21e | 1617 | |
| 6136c704 | 1618 | if (io) { |
| 50db69d8 | 1619 | const MAGIC *const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar); |
| 6136c704 | 1620 | if (mg) { |
| 50db69d8 | 1621 | Perl_tied_method(aTHX_ "READLINE", SP, MUTABLE_SV(io), mg, gimme, 0); |
| 6136c704 | 1622 | if (gimme == G_SCALAR) { |
| 50db69d8 NC |
1623 | SPAGAIN; |
| 1624 | SvSetSV_nosteal(TARG, TOPs); | |
| 1625 | SETTARG; | |
| 6136c704 | 1626 | } |
| 50db69d8 | 1627 | return NORMAL; |
| 0b7c7b4f | 1628 | } |
| e79b0511 | 1629 | } |
| 4608196e | 1630 | fp = NULL; |
| a0d0e21e LW |
1631 | if (io) { |
| 1632 | fp = IoIFP(io); | |
| 1633 | if (!fp) { | |
| 1634 | if (IoFLAGS(io) & IOf_ARGV) { | |
| 1635 | if (IoFLAGS(io) & IOf_START) { | |
| a0d0e21e | 1636 | IoLINES(io) = 0; |
| 3280af22 | 1637 | if (av_len(GvAVn(PL_last_in_gv)) < 0) { |
| 1d7c1841 | 1638 | IoFLAGS(io) &= ~IOf_START; |
| 4608196e | 1639 | do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,NULL); |
| 4bac9ae4 | 1640 | SvTAINTED_off(GvSVn(PL_last_in_gv)); /* previous tainting irrelevant */ |
| 76f68e9b | 1641 | sv_setpvs(GvSVn(PL_last_in_gv), "-"); |
| 3280af22 | 1642 | SvSETMAGIC(GvSV(PL_last_in_gv)); |
| a2008d6d GS |
1643 | fp = IoIFP(io); |
| 1644 | goto have_fp; | |
| a0d0e21e LW |
1645 | } |
| 1646 | } | |
| 3280af22 | 1647 | fp = nextargv(PL_last_in_gv); |
| a0d0e21e | 1648 | if (!fp) { /* Note: fp != IoIFP(io) */ |
| 3280af22 | 1649 | (void)do_close(PL_last_in_gv, FALSE); /* now it does*/ |
| a0d0e21e LW |
1650 | } |
| 1651 | } | |
| 0d44d22b NC |
1652 | else if (type == OP_GLOB) |
| 1653 | fp = Perl_start_glob(aTHX_ POPs, io); | |
| a0d0e21e LW |
1654 | } |
| 1655 | else if (type == OP_GLOB) | |
| 1656 | SP--; | |
| 7716c5c5 | 1657 | else if (IoTYPE(io) == IoTYPE_WRONLY) { |
| a5390457 | 1658 | report_wrongway_fh(PL_last_in_gv, '>'); |
| a00b5bd3 | 1659 | } |
| a0d0e21e LW |
1660 | } |
| 1661 | if (!fp) { | |
| 041457d9 DM |
1662 | if ((!io || !(IoFLAGS(io) & IOf_START)) |
| 1663 | && ckWARN2(WARN_GLOB, WARN_CLOSED)) | |
| 1664 | { | |
| 3f4520fe | 1665 | if (type == OP_GLOB) |
| 63922903 | 1666 | Perl_ck_warner_d(aTHX_ packWARN(WARN_GLOB), |
| af8c498a GS |
1667 | "glob failed (can't start child: %s)", |
| 1668 | Strerror(errno)); | |
| 69282e91 | 1669 | else |
| 831e4cc3 | 1670 | report_evil_fh(PL_last_in_gv); |
| 3f4520fe | 1671 | } |
| 54310121 | 1672 | if (gimme == G_SCALAR) { |
| 79628082 | 1673 | /* undef TARG, and push that undefined value */ |
| ba92458f AE |
1674 | if (type != OP_RCATLINE) { |
| 1675 | SV_CHECK_THINKFIRST_COW_DROP(TARG); | |
| 0c34ef67 | 1676 | SvOK_off(TARG); |
| ba92458f | 1677 | } |
| a0d0e21e LW |
1678 | PUSHTARG; |
| 1679 | } | |
| 1680 | RETURN; | |
| 1681 | } | |
| a2008d6d | 1682 | have_fp: |
| 54310121 | 1683 | if (gimme == G_SCALAR) { |
| a0d0e21e | 1684 | sv = TARG; |
| 0f722b55 RGS |
1685 | if (type == OP_RCATLINE && SvGMAGICAL(sv)) |
| 1686 | mg_get(sv); | |
| 48de12d9 RGS |
1687 | if (SvROK(sv)) { |
| 1688 | if (type == OP_RCATLINE) | |
| 5668452f | 1689 | SvPV_force_nomg_nolen(sv); |
| 48de12d9 RGS |
1690 | else |
| 1691 | sv_unref(sv); | |
| 1692 | } | |
| f7877b28 | 1693 | else if (isGV_with_GP(sv)) { |
| 5668452f | 1694 | SvPV_force_nomg_nolen(sv); |
| f7877b28 | 1695 | } |
| 862a34c6 | 1696 | SvUPGRADE(sv, SVt_PV); |
| a0d0e21e | 1697 | tmplen = SvLEN(sv); /* remember if already alloced */ |
| e3918bb7 | 1698 | if (!tmplen && !SvREADONLY(sv) && !SvIsCOW(sv)) { |
| f72e8700 JJ |
1699 | /* try short-buffering it. Please update t/op/readline.t |
| 1700 | * if you change the growth length. | |
| 1701 | */ | |
| 1702 | Sv_Grow(sv, 80); | |
| 1703 | } | |
| 2b5e58c4 AMS |
1704 | offset = 0; |
| 1705 | if (type == OP_RCATLINE && SvOK(sv)) { | |
| 1706 | if (!SvPOK(sv)) { | |
| 5668452f | 1707 | SvPV_force_nomg_nolen(sv); |
| 2b5e58c4 | 1708 | } |
| a0d0e21e | 1709 | offset = SvCUR(sv); |
| 2b5e58c4 | 1710 | } |
| a0d0e21e | 1711 | } |
| 54310121 | 1712 | else { |
| 561b68a9 | 1713 | sv = sv_2mortal(newSV(80)); |
| 54310121 | 1714 | offset = 0; |
| 1715 | } | |
| fbad3eb5 | 1716 | |
| 3887d568 AP |
1717 | /* This should not be marked tainted if the fp is marked clean */ |
| 1718 | #define MAYBE_TAINT_LINE(io, sv) \ | |
| 1719 | if (!(IoFLAGS(io) & IOf_UNTAINT)) { \ | |
| 1720 | TAINT; \ | |
| 1721 | SvTAINTED_on(sv); \ | |
| 1722 | } | |
| 1723 | ||
| 684bef36 | 1724 | /* delay EOF state for a snarfed empty file */ |
| fbad3eb5 | 1725 | #define SNARF_EOF(gimme,rs,io,sv) \ |
| 684bef36 | 1726 | (gimme != G_SCALAR || SvCUR(sv) \ |
| b9fee9ba | 1727 | || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs)) |
| fbad3eb5 | 1728 | |
| a0d0e21e | 1729 | for (;;) { |
| 09e8efcc | 1730 | PUTBACK; |
| fbad3eb5 | 1731 | if (!sv_gets(sv, fp, offset) |
| 2d726892 TF |
1732 | && (type == OP_GLOB |
| 1733 | || SNARF_EOF(gimme, PL_rs, io, sv) | |
| 1734 | || PerlIO_error(fp))) | |
| fbad3eb5 | 1735 | { |
| 760ac839 | 1736 | PerlIO_clearerr(fp); |
| a0d0e21e | 1737 | if (IoFLAGS(io) & IOf_ARGV) { |
| 3280af22 | 1738 | fp = nextargv(PL_last_in_gv); |
| a0d0e21e LW |
1739 | if (fp) |
| 1740 | continue; | |
| 3280af22 | 1741 | (void)do_close(PL_last_in_gv, FALSE); |
| a0d0e21e LW |
1742 | } |
| 1743 | else if (type == OP_GLOB) { | |
| a2a5de95 NC |
1744 | if (!do_close(PL_last_in_gv, FALSE)) { |
| 1745 | Perl_ck_warner(aTHX_ packWARN(WARN_GLOB), | |
| 1746 | "glob failed (child exited with status %d%s)", | |
| 1747 | (int)(STATUS_CURRENT >> 8), | |
| 1748 | (STATUS_CURRENT & 0x80) ? ", core dumped" : ""); | |
| 4eb79ab5 | 1749 | } |
| a0d0e21e | 1750 | } |
| 54310121 | 1751 | if (gimme == G_SCALAR) { |
| ba92458f AE |
1752 | if (type != OP_RCATLINE) { |
| 1753 | SV_CHECK_THINKFIRST_COW_DROP(TARG); | |
| 0c34ef67 | 1754 | SvOK_off(TARG); |
| ba92458f | 1755 | } |
| 09e8efcc | 1756 | SPAGAIN; |
| a0d0e21e LW |
1757 | PUSHTARG; |
| 1758 | } | |
| 3887d568 | 1759 | MAYBE_TAINT_LINE(io, sv); |
| a0d0e21e LW |
1760 | RETURN; |
| 1761 | } | |
| 3887d568 | 1762 | MAYBE_TAINT_LINE(io, sv); |
| a0d0e21e | 1763 | IoLINES(io)++; |
| b9fee9ba | 1764 | IoFLAGS(io) |= IOf_NOLINE; |
| 71be2cbc | 1765 | SvSETMAGIC(sv); |
| 09e8efcc | 1766 | SPAGAIN; |
| a0d0e21e | 1767 | XPUSHs(sv); |
| a0d0e21e | 1768 | if (type == OP_GLOB) { |
| 349d4f2f | 1769 | const char *t1; |
| a0d0e21e | 1770 | |
| 3280af22 | 1771 | if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) { |
| 6136c704 | 1772 | char * const tmps = SvEND(sv) - 1; |
| aa07b2f6 | 1773 | if (*tmps == *SvPVX_const(PL_rs)) { |
| c07a80fd | 1774 | *tmps = '\0'; |
| b162af07 | 1775 | SvCUR_set(sv, SvCUR(sv) - 1); |
| c07a80fd | 1776 | } |
| 1777 | } | |
| 349d4f2f | 1778 | for (t1 = SvPVX_const(sv); *t1; t1++) |
| 937b2e03 | 1779 | if (!isALNUMC(*t1) && |
| 349d4f2f | 1780 | strchr("$&*(){}[]'\";\\|?<>~`", *t1)) |
| a0d0e21e | 1781 | break; |
| 349d4f2f | 1782 | if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) { |
| a0d0e21e LW |
1783 | (void)POPs; /* Unmatched wildcard? Chuck it... */ |
| 1784 | continue; | |
| 1785 | } | |
| 2d79bf7f | 1786 | } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */ |
| d4c19fe8 AL |
1787 | if (ckWARN(WARN_UTF8)) { |
| 1788 | const U8 * const s = (const U8*)SvPVX_const(sv) + offset; | |
| 1789 | const STRLEN len = SvCUR(sv) - offset; | |
| 1790 | const U8 *f; | |
| 1791 | ||
| 1792 | if (!is_utf8_string_loc(s, len, &f)) | |
| 1793 | /* Emulate :encoding(utf8) warning in the same case. */ | |
| 1794 | Perl_warner(aTHX_ packWARN(WARN_UTF8), | |
| 1795 | "utf8 \"\\x%02X\" does not map to Unicode", | |
| 1796 | f < (U8*)SvEND(sv) ? *f : 0); | |
| 1797 | } | |
| a0d0e21e | 1798 | } |
| 54310121 | 1799 | if (gimme == G_ARRAY) { |
| a0d0e21e | 1800 | if (SvLEN(sv) - SvCUR(sv) > 20) { |
| 1da4ca5f | 1801 | SvPV_shrink_to_cur(sv); |
| a0d0e21e | 1802 | } |
| 561b68a9 | 1803 | sv = sv_2mortal(newSV(80)); |
| a0d0e21e LW |
1804 | continue; |
| 1805 | } | |
| 54310121 | 1806 | else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) { |
| a0d0e21e | 1807 | /* try to reclaim a bit of scalar space (only on 1st alloc) */ |
| d5b5861b NC |
1808 | const STRLEN new_len |
| 1809 | = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */ | |
| 1da4ca5f | 1810 | SvPV_renew(sv, new_len); |
| a0d0e21e LW |
1811 | } |
| 1812 | RETURN; | |
| 1813 | } | |
| 1814 | } | |
| 1815 | ||
| a0d0e21e LW |
1816 | PP(pp_helem) |
| 1817 | { | |
| 97aff369 | 1818 | dVAR; dSP; |
| 760ac839 | 1819 | HE* he; |
| ae77835f | 1820 | SV **svp; |
| c445ea15 | 1821 | SV * const keysv = POPs; |
| 85fbaab2 | 1822 | HV * const hv = MUTABLE_HV(POPs); |
| a3b680e6 AL |
1823 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
| 1824 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
| be6c24e0 | 1825 | SV *sv; |
| 92970b93 | 1826 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
| d30e492c | 1827 | bool preeminent = TRUE; |
| a0d0e21e | 1828 | |
| d4c19fe8 | 1829 | if (SvTYPE(hv) != SVt_PVHV) |
| a0d0e21e | 1830 | RETPUSHUNDEF; |
| d4c19fe8 | 1831 | |
| 92970b93 | 1832 | if (localizing) { |
| d4c19fe8 AL |
1833 | MAGIC *mg; |
| 1834 | HV *stash; | |
| d30e492c VP |
1835 | |
| 1836 | /* If we can determine whether the element exist, | |
| 1837 | * Try to preserve the existenceness of a tied hash | |
| 1838 | * element by using EXISTS and DELETE if possible. | |
| 1839 | * Fallback to FETCH and STORE otherwise. */ | |
| 2c5f48c2 | 1840 | if (SvCANEXISTDELETE(hv)) |
| d30e492c | 1841 | preeminent = hv_exists_ent(hv, keysv, 0); |
| d4c19fe8 | 1842 | } |
| d30e492c | 1843 | |
| 5f9d7e2b | 1844 | he = hv_fetch_ent(hv, keysv, lval && !defer, 0); |
| d4c19fe8 | 1845 | svp = he ? &HeVAL(he) : NULL; |
| a0d0e21e | 1846 | if (lval) { |
| 746f6409 | 1847 | if (!svp || !*svp || *svp == &PL_sv_undef) { |
| 68dc0745 | 1848 | SV* lv; |
| 1849 | SV* key2; | |
| 2d8e6c8d | 1850 | if (!defer) { |
| be2597df | 1851 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); |
| 2d8e6c8d | 1852 | } |
| 68dc0745 | 1853 | lv = sv_newmortal(); |
| 1854 | sv_upgrade(lv, SVt_PVLV); | |
| 1855 | LvTYPE(lv) = 'y'; | |
| 6136c704 | 1856 | sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0); |
| 68dc0745 | 1857 | SvREFCNT_dec(key2); /* sv_magic() increments refcount */ |
| b37c2d43 | 1858 | LvTARG(lv) = SvREFCNT_inc_simple(hv); |
| 68dc0745 | 1859 | LvTARGLEN(lv) = 1; |
| 1860 | PUSHs(lv); | |
| 1861 | RETURN; | |
| 1862 | } | |
| 92970b93 | 1863 | if (localizing) { |
| bfcb3514 | 1864 | if (HvNAME_get(hv) && isGV(*svp)) |
| 159b6efe | 1865 | save_gp(MUTABLE_GV(*svp), !(PL_op->op_flags & OPf_SPECIAL)); |
| 47cfc530 VP |
1866 | else if (preeminent) |
| 1867 | save_helem_flags(hv, keysv, svp, | |
| 1868 | (PL_op->op_flags & OPf_SPECIAL) ? 0 : SAVEf_SETMAGIC); | |
| 1869 | else | |
| 1870 | SAVEHDELETE(hv, keysv); | |
| 5f05dabc | 1871 | } |
| 9026059d GG |
1872 | else if (PL_op->op_private & OPpDEREF) { |
| 1873 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
| 1874 | RETURN; | |
| 1875 | } | |
| a0d0e21e | 1876 | } |
| 746f6409 | 1877 | sv = (svp && *svp ? *svp : &PL_sv_undef); |
| fd69380d DM |
1878 | /* Originally this did a conditional C<sv = sv_mortalcopy(sv)>; this |
| 1879 | * was to make C<local $tied{foo} = $tied{foo}> possible. | |
| 1880 | * However, it seems no longer to be needed for that purpose, and | |
| 1881 | * introduced a new bug: stuff like C<while ($hash{taintedval} =~ /.../g> | |
| 1882 | * would loop endlessly since the pos magic is getting set on the | |
| 1883 | * mortal copy and lost. However, the copy has the effect of | |
| 1884 | * triggering the get magic, and losing it altogether made things like | |
| 1885 | * c<$tied{foo};> in void context no longer do get magic, which some | |
| 1886 | * code relied on. Also, delayed triggering of magic on @+ and friends | |
| 1887 | * meant the original regex may be out of scope by now. So as a | |
| 1888 | * compromise, do the get magic here. (The MGf_GSKIP flag will stop it | |
| 1889 | * being called too many times). */ | |
| 39cf747a | 1890 | if (!lval && SvRMAGICAL(hv) && SvGMAGICAL(sv)) |
| fd69380d | 1891 | mg_get(sv); |
| be6c24e0 | 1892 | PUSHs(sv); |
| a0d0e21e LW |
1893 | RETURN; |
| 1894 | } | |
| 1895 | ||
| a0d0e21e LW |
1896 | PP(pp_iter) |
| 1897 | { | |
| 97aff369 | 1898 | dVAR; dSP; |
| eb578fdb | 1899 | PERL_CONTEXT *cx; |
| 7d6c2cef | 1900 | SV *oldsv; |
| 1d7c1841 | 1901 | SV **itersvp; |
| a0d0e21e | 1902 | |
| 924508f0 | 1903 | EXTEND(SP, 1); |
| a0d0e21e | 1904 | cx = &cxstack[cxstack_ix]; |
| 1d7c1841 | 1905 | itersvp = CxITERVAR(cx); |
| a48ce6be DM |
1906 | |
| 1907 | switch (CxTYPE(cx)) { | |
| 17c91640 | 1908 | |
| b552b52c DM |
1909 | case CXt_LOOP_LAZYSV: /* string increment */ |
| 1910 | { | |
| 1911 | SV* cur = cx->blk_loop.state_u.lazysv.cur; | |
| 1912 | SV *end = cx->blk_loop.state_u.lazysv.end; | |
| 1913 | /* If the maximum is !SvOK(), pp_enteriter substitutes PL_sv_no. | |
| 1914 | It has SvPVX of "" and SvCUR of 0, which is what we want. */ | |
| 1915 | STRLEN maxlen = 0; | |
| 1916 | const char *max = SvPV_const(end, maxlen); | |
| 1917 | if (SvNIOK(cur) || SvCUR(cur) > maxlen) | |
| 1918 | RETPUSHNO; | |
| 1919 | ||
| 1920 | oldsv = *itersvp; | |
| 1921 | if (SvREFCNT(oldsv) == 1 && !SvMAGICAL(oldsv)) { | |
| 1922 | /* safe to reuse old SV */ | |
| 1923 | sv_setsv(oldsv, cur); | |
| a48ce6be | 1924 | } |
| b552b52c DM |
1925 | else |
| 1926 | { | |
| 1927 | /* we need a fresh SV every time so that loop body sees a | |
| 1928 | * completely new SV for closures/references to work as | |
| 1929 | * they used to */ | |
| 1930 | *itersvp = newSVsv(cur); | |
| 1931 | SvREFCNT_dec(oldsv); | |
| 1932 | } | |
| 1933 | if (strEQ(SvPVX_const(cur), max)) | |
| 1934 | sv_setiv(cur, 0); /* terminate next time */ | |
| 1935 | else | |
| 1936 | sv_inc(cur); | |
| 1937 | break; | |
| 1938 | } | |
| a48ce6be | 1939 | |
| fcef60b4 DM |
1940 | case CXt_LOOP_LAZYIV: /* integer increment */ |
| 1941 | { | |
| 1942 | IV cur = cx->blk_loop.state_u.lazyiv.cur; | |
| 1943 | if (cur > cx->blk_loop.state_u.lazyiv.end) | |
| 89ea2908 | 1944 | RETPUSHNO; |
| 7f61b687 | 1945 | |
| fcef60b4 | 1946 | oldsv = *itersvp; |
| 3db8f154 | 1947 | /* don't risk potential race */ |
| fcef60b4 | 1948 | if (SvREFCNT(oldsv) == 1 && !SvMAGICAL(oldsv)) { |
| eaa5c2d6 | 1949 | /* safe to reuse old SV */ |
| fcef60b4 | 1950 | sv_setiv(oldsv, cur); |
| eaa5c2d6 | 1951 | } |
| 1c846c1f | 1952 | else |
| eaa5c2d6 GA |
1953 | { |
| 1954 | /* we need a fresh SV every time so that loop body sees a | |
| 1955 | * completely new SV for closures/references to work as they | |
| 1956 | * used to */ | |
| fcef60b4 | 1957 | *itersvp = newSViv(cur); |
| dc09a129 | 1958 | SvREFCNT_dec(oldsv); |
| eaa5c2d6 | 1959 | } |
| a2309040 | 1960 | |
| fcef60b4 | 1961 | if (cur == IV_MAX) { |
| cdc1aa42 NC |
1962 | /* Handle end of range at IV_MAX */ |
| 1963 | cx->blk_loop.state_u.lazyiv.end = IV_MIN; | |
| 1964 | } else | |
| 1965 | ++cx->blk_loop.state_u.lazyiv.cur; | |
| a48ce6be | 1966 | break; |
| fcef60b4 | 1967 | } |
| a48ce6be | 1968 | |
| b552b52c | 1969 | case CXt_LOOP_FOR: /* iterate array */ |
| 7d6c2cef | 1970 | { |
| 89ea2908 | 1971 | |
| 7d6c2cef DM |
1972 | AV *av = cx->blk_loop.state_u.ary.ary; |
| 1973 | SV *sv; | |
| 1974 | bool av_is_stack = FALSE; | |
| a8a20bb6 | 1975 | IV ix; |
| 7d6c2cef | 1976 | |
| de080daa DM |
1977 | if (!av) { |
| 1978 | av_is_stack = TRUE; | |
| 1979 | av = PL_curstack; | |
| 1980 | } | |
| 1981 | if (PL_op->op_private & OPpITER_REVERSED) { | |
| a8a20bb6 DM |
1982 | ix = --cx->blk_loop.state_u.ary.ix; |
| 1983 | if (ix <= (av_is_stack ? cx->blk_loop.resetsp : -1)) | |
| de080daa | 1984 | RETPUSHNO; |
| de080daa DM |
1985 | } |
| 1986 | else { | |
| a8a20bb6 DM |
1987 | ix = ++cx->blk_loop.state_u.ary.ix; |
| 1988 | if (ix > (av_is_stack ? cx->blk_oldsp : AvFILL(av))) | |
| de080daa | 1989 | RETPUSHNO; |
| a8a20bb6 | 1990 | } |
| de080daa | 1991 | |
| a8a20bb6 DM |
1992 | if (SvMAGICAL(av) || AvREIFY(av)) { |
| 1993 | SV * const * const svp = av_fetch(av, ix, FALSE); | |
| 1994 | sv = svp ? *svp : NULL; | |
| 1995 | } | |
| 1996 | else { | |
| 1997 | sv = AvARRAY(av)[ix]; | |
| de080daa | 1998 | } |
| ef3e5ea9 | 1999 | |
| de080daa | 2000 | if (sv) { |
| f38aa882 DM |
2001 | if (SvIS_FREED(sv)) { |
| 2002 | *itersvp = NULL; | |
| 2003 | Perl_croak(aTHX_ "Use of freed value in iteration"); | |
| 2004 | } | |
| de080daa DM |
2005 | SvTEMP_off(sv); |
| 2006 | SvREFCNT_inc_simple_void_NN(sv); | |
| 2007 | } | |
| 2008 | else | |
| 2009 | sv = &PL_sv_undef; | |
| f38aa882 | 2010 | |
| de080daa DM |
2011 | if (!av_is_stack && sv == &PL_sv_undef) { |
| 2012 | SV *lv = newSV_type(SVt_PVLV); | |
| 2013 | LvTYPE(lv) = 'y'; | |
| 2014 | sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0); | |
| 2015 | LvTARG(lv) = SvREFCNT_inc_simple(av); | |
| f38aa882 | 2016 | LvTARGOFF(lv) = ix; |
| de080daa DM |
2017 | LvTARGLEN(lv) = (STRLEN)UV_MAX; |
| 2018 | sv = lv; | |
| 2019 | } | |
| a0d0e21e | 2020 | |
| de080daa DM |
2021 | oldsv = *itersvp; |
| 2022 | *itersvp = sv; | |
| 2023 | SvREFCNT_dec(oldsv); | |
| de080daa | 2024 | break; |
| 7d6c2cef | 2025 | } |
| a48ce6be DM |
2026 | |
| 2027 | default: | |
| 2028 | DIE(aTHX_ "panic: pp_iter, type=%u", CxTYPE(cx)); | |
| 2029 | } | |
| b552b52c | 2030 | RETPUSHYES; |
| a0d0e21e LW |
2031 | } |
| 2032 | ||
| ef07e810 DM |
2033 | /* |
| 2034 | A description of how taint works in pattern matching and substitution. | |
| 2035 | ||
| 284167a5 S |
2036 | This is all conditional on NO_TAINT_SUPPORT not being defined. Under |
| 2037 | NO_TAINT_SUPPORT, taint-related operations should become no-ops. | |
| 2038 | ||
| 4e19c54b | 2039 | While the pattern is being assembled/concatenated and then compiled, |
| 284167a5 S |
2040 | PL_tainted will get set (via TAINT_set) if any component of the pattern |
| 2041 | is tainted, e.g. /.*$tainted/. At the end of pattern compilation, | |
| 2042 | the RXf_TAINTED flag is set on the pattern if PL_tainted is set (via | |
| 2043 | TAINT_get). | |
| ef07e810 | 2044 | |
| 0ab462a6 DM |
2045 | When the pattern is copied, e.g. $r = qr/..../, the SV holding the ref to |
| 2046 | the pattern is marked as tainted. This means that subsequent usage, such | |
| 284167a5 S |
2047 | as /x$r/, will set PL_tainted using TAINT_set, and thus RXf_TAINTED, |
| 2048 | on the new pattern too. | |
| ef07e810 DM |
2049 | |
| 2050 | During execution of a pattern, locale-variant ops such as ALNUML set the | |
| 2051 | local flag RF_tainted. At the end of execution, the engine sets the | |
| 0ab462a6 DM |
2052 | RXf_TAINTED_SEEN on the pattern if RF_tainted got set, or clears it |
| 2053 | otherwise. | |
| ef07e810 DM |
2054 | |
| 2055 | In addition, RXf_TAINTED_SEEN is used post-execution by the get magic code | |
| 2056 | of $1 et al to indicate whether the returned value should be tainted. | |
| 2057 | It is the responsibility of the caller of the pattern (i.e. pp_match, | |
| 2058 | pp_subst etc) to set this flag for any other circumstances where $1 needs | |
| 2059 | to be tainted. | |
| 2060 | ||
| 2061 | The taint behaviour of pp_subst (and pp_substcont) is quite complex. | |
| 2062 | ||
| 2063 | There are three possible sources of taint | |
| 2064 | * the source string | |
| 2065 | * the pattern (both compile- and run-time, RXf_TAINTED / RXf_TAINTED_SEEN) | |
| 2066 | * the replacement string (or expression under /e) | |
| 2067 | ||
| 2068 | There are four destinations of taint and they are affected by the sources | |
| 2069 | according to the rules below: | |
| 2070 | ||
| 2071 | * the return value (not including /r): | |
| 2072 | tainted by the source string and pattern, but only for the | |
| 2073 | number-of-iterations case; boolean returns aren't tainted; | |
| 2074 | * the modified string (or modified copy under /r): | |
| 2075 | tainted by the source string, pattern, and replacement strings; | |
| 2076 | * $1 et al: | |
| 2077 | tainted by the pattern, and under 'use re "taint"', by the source | |
| 2078 | string too; | |
| 2079 | * PL_taint - i.e. whether subsequent code (e.g. in a /e block) is tainted: | |
| 2080 | should always be unset before executing subsequent code. | |
| 2081 | ||
| 2082 | The overall action of pp_subst is: | |
| 2083 | ||
| 2084 | * at the start, set bits in rxtainted indicating the taint status of | |
| 2085 | the various sources. | |
| 2086 | ||
| 2087 | * After each pattern execution, update the SUBST_TAINT_PAT bit in | |
| 2088 | rxtainted if RXf_TAINTED_SEEN has been set, to indicate that the | |
| 2089 | pattern has subsequently become tainted via locale ops. | |
| 2090 | ||
| 2091 | * If control is being passed to pp_substcont to execute a /e block, | |
| 2092 | save rxtainted in the CXt_SUBST block, for future use by | |
| 2093 | pp_substcont. | |
| 2094 | ||
| 2095 | * Whenever control is being returned to perl code (either by falling | |
| 2096 | off the "end" of pp_subst/pp_substcont, or by entering a /e block), | |
| 2097 | use the flag bits in rxtainted to make all the appropriate types of | |
| 0ab462a6 DM |
2098 | destination taint visible; e.g. set RXf_TAINTED_SEEN so that $1 |
| 2099 | et al will appear tainted. | |
| ef07e810 DM |
2100 | |
| 2101 | pp_match is just a simpler version of the above. | |
| 2102 | ||
| 2103 | */ | |
| 2104 | ||
| a0d0e21e LW |
2105 | PP(pp_subst) |
| 2106 | { | |
| 97aff369 | 2107 | dVAR; dSP; dTARG; |
| eb578fdb | 2108 | PMOP *pm = cPMOP; |
| a0d0e21e | 2109 | PMOP *rpm = pm; |
| eb578fdb | 2110 | char *s; |
| a0d0e21e | 2111 | char *strend; |
| eb578fdb | 2112 | char *m; |
| 5c144d81 | 2113 | const char *c; |
| eb578fdb | 2114 | char *d; |
| a0d0e21e LW |
2115 | STRLEN clen; |
| 2116 | I32 iters = 0; | |
| 2117 | I32 maxiters; | |
| eb578fdb | 2118 | I32 i; |
| a0d0e21e | 2119 | bool once; |
| ef07e810 DM |
2120 | U8 rxtainted = 0; /* holds various SUBST_TAINT_* flag bits. |
| 2121 | See "how taint works" above */ | |
| a0d0e21e | 2122 | char *orig; |
| 1ed74d04 | 2123 | U8 r_flags; |
| eb578fdb | 2124 | REGEXP *rx = PM_GETRE(pm); |
| a0d0e21e LW |
2125 | STRLEN len; |
| 2126 | int force_on_match = 0; | |
| 0bcc34c2 | 2127 | const I32 oldsave = PL_savestack_ix; |
| 792b2c16 | 2128 | STRLEN slen; |
| 26a74523 | 2129 | bool doutf8 = FALSE; /* whether replacement is in utf8 */ |
| f8c7b90f | 2130 | #ifdef PERL_OLD_COPY_ON_WRITE |
| ed252734 NC |
2131 | bool is_cow; |
| 2132 | #endif | |
| a0714e2c | 2133 | SV *nsv = NULL; |
| b770e143 | 2134 | /* known replacement string? */ |
| eb578fdb | 2135 | SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL; |
| a0d0e21e | 2136 | |
| f410a211 NC |
2137 | PERL_ASYNC_CHECK(); |
| 2138 | ||
| 533c011a | 2139 | if (PL_op->op_flags & OPf_STACKED) |
| a0d0e21e | 2140 | TARG = POPs; |
| 59f00321 RGS |
2141 | else if (PL_op->op_private & OPpTARGET_MY) |
| 2142 | GETTARGET; | |
| a0d0e21e | 2143 | else { |
| 54b9620d | 2144 | TARG = DEFSV; |
| a0d0e21e | 2145 | EXTEND(SP,1); |
| 1c846c1f | 2146 | } |
| d9f424b2 | 2147 | |
| 64534138 | 2148 | SvGETMAGIC(TARG); /* must come before cow check */ |
| f8c7b90f | 2149 | #ifdef PERL_OLD_COPY_ON_WRITE |
| ed252734 NC |
2150 | /* Awooga. Awooga. "bool" types that are actually char are dangerous, |
| 2151 | because they make integers such as 256 "false". */ | |
| 2152 | is_cow = SvIsCOW(TARG) ? TRUE : FALSE; | |
| 2153 | #else | |
| 765f542d NC |
2154 | if (SvIsCOW(TARG)) |
| 2155 | sv_force_normal_flags(TARG,0); | |
| ed252734 | 2156 | #endif |
| 8ca8a454 | 2157 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT) |
| f8c7b90f | 2158 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 8ca8a454 | 2159 | && !is_cow |
| ed252734 | 2160 | #endif |
| 8ca8a454 NC |
2161 | && (SvREADONLY(TARG) |
| 2162 | || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG)) | |
| 2163 | || SvTYPE(TARG) > SVt_PVLV) | |
| 2164 | && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))) | |
| cb077ed2 | 2165 | Perl_croak_no_modify(); |
| 8ec5e241 NIS |
2166 | PUTBACK; |
| 2167 | ||
| 64534138 | 2168 | s = SvPV_nomg(TARG, len); |
| 4499db73 | 2169 | if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV || SvVOK(TARG)) |
| a0d0e21e | 2170 | force_on_match = 1; |
| 20be6587 DM |
2171 | |
| 2172 | /* only replace once? */ | |
| 2173 | once = !(rpm->op_pmflags & PMf_GLOBAL); | |
| 2174 | ||
| ef07e810 | 2175 | /* See "how taint works" above */ |
| 284167a5 | 2176 | if (TAINTING_get) { |
| 20be6587 DM |
2177 | rxtainted = ( |
| 2178 | (SvTAINTED(TARG) ? SUBST_TAINT_STR : 0) | |
| 284167a5 | 2179 | | (RX_ISTAINTED(rx) ? SUBST_TAINT_PAT : 0) |
| 20be6587 DM |
2180 | | ((pm->op_pmflags & PMf_RETAINT) ? SUBST_TAINT_RETAINT : 0) |
| 2181 | | ((once && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
| 2182 | ? SUBST_TAINT_BOOLRET : 0)); | |
| 2183 | TAINT_NOT; | |
| 2184 | } | |
| a12c0f56 | 2185 | |
| a30b2f1f | 2186 | RX_MATCH_UTF8_set(rx, DO_UTF8(TARG)); |
| d9f424b2 | 2187 | |
| a0d0e21e LW |
2188 | force_it: |
| 2189 | if (!pm || !s) | |
| 5637ef5b | 2190 | DIE(aTHX_ "panic: pp_subst, pm=%p, s=%p", pm, s); |
| a0d0e21e LW |
2191 | |
| 2192 | strend = s + len; | |
| a30b2f1f | 2193 | slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len; |
| 792b2c16 JH |
2194 | maxiters = 2 * slen + 10; /* We can match twice at each |
| 2195 | position, once with zero-length, | |
| 2196 | second time with non-zero. */ | |
| a0d0e21e | 2197 | |
| 6a97c51d | 2198 | if (!RX_PRELEN(rx) && PL_curpm |
| 8d919b0a | 2199 | && !ReANY(rx)->mother_re) { |
| 3280af22 | 2200 | pm = PL_curpm; |
| aaa362c4 | 2201 | rx = PM_GETRE(pm); |
| a0d0e21e | 2202 | } |
| 6502e081 DM |
2203 | |
| 2204 | r_flags = ( RX_NPARENS(rx) | |
| 2205 | || PL_sawampersand | |
| 6502e081 DM |
2206 | || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
| 2207 | ) | |
| 2208 | ? REXEC_COPY_STR | |
| 2209 | : 0; | |
| 7fba1cd6 | 2210 | |
| a0d0e21e | 2211 | orig = m = s; |
| 07bc277f | 2212 | if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT) { |
| ee0b7718 | 2213 | PL_bostr = orig; |
| f9f4320a | 2214 | s = CALLREG_INTUIT_START(rx, TARG, s, strend, r_flags, NULL); |
| f722798b IZ |
2215 | |
| 2216 | if (!s) | |
| df34c13a | 2217 | goto ret_no; |
| f722798b | 2218 | /* How to do it in subst? */ |
| 07bc277f | 2219 | /* if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL) |
| 1c846c1f | 2220 | && !PL_sawampersand |
| a91cc451 | 2221 | && !(RX_EXTFLAGS(rx) & RXf_KEEPCOPY)) |
| f722798b IZ |
2222 | goto yup; |
| 2223 | */ | |
| a0d0e21e | 2224 | } |
| 71be2cbc | 2225 | |
| 8b64c330 DM |
2226 | if (!CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL, |
| 2227 | r_flags | REXEC_CHECKED)) | |
| 2228 | { | |
| 5e79dfb9 DM |
2229 | ret_no: |
| 2230 | SPAGAIN; | |
| 2231 | PUSHs(rpm->op_pmflags & PMf_NONDESTRUCT ? TARG : &PL_sv_no); | |
| 2232 | LEAVE_SCOPE(oldsave); | |
| 2233 | RETURN; | |
| 2234 | } | |
| 2235 | ||
| 1754320d FC |
2236 | PL_curpm = pm; |
| 2237 | ||
| 71be2cbc | 2238 | /* known replacement string? */ |
| f272994b | 2239 | if (dstr) { |
| 8514a05a JH |
2240 | /* replacement needing upgrading? */ |
| 2241 | if (DO_UTF8(TARG) && !doutf8) { | |
| db79b45b | 2242 | nsv = sv_newmortal(); |
| 4a176938 | 2243 | SvSetSV(nsv, dstr); |
| 8514a05a JH |
2244 | if (PL_encoding) |
| 2245 | sv_recode_to_utf8(nsv, PL_encoding); | |
| 2246 | else | |
| 2247 | sv_utf8_upgrade(nsv); | |
| 5c144d81 | 2248 | c = SvPV_const(nsv, clen); |
| 4a176938 JH |
2249 | doutf8 = TRUE; |
| 2250 | } | |
| 2251 | else { | |
| 5c144d81 | 2252 | c = SvPV_const(dstr, clen); |
| 4a176938 | 2253 | doutf8 = DO_UTF8(dstr); |
| 8514a05a | 2254 | } |
| bb933b9b FC |
2255 | |
| 2256 | if (SvTAINTED(dstr)) | |
| 2257 | rxtainted |= SUBST_TAINT_REPL; | |
| f272994b A |
2258 | } |
| 2259 | else { | |
| 6136c704 | 2260 | c = NULL; |
| f272994b A |
2261 | doutf8 = FALSE; |
| 2262 | } | |
| 2263 | ||
| 71be2cbc | 2264 | /* can do inplace substitution? */ |
| ed252734 | 2265 | if (c |
| f8c7b90f | 2266 | #ifdef PERL_OLD_COPY_ON_WRITE |
| ed252734 NC |
2267 | && !is_cow |
| 2268 | #endif | |
| fbfb1899 DM |
2269 | && (I32)clen <= RX_MINLENRET(rx) |
| 2270 | && (once || !(r_flags & REXEC_COPY_STR)) | |
| 1754320d | 2271 | && !(RX_EXTFLAGS(rx) & (RXf_LOOKBEHIND_SEEN|RXf_MODIFIES_VARS)) |
| 8ca8a454 NC |
2272 | && (!doutf8 || SvUTF8(TARG)) |
| 2273 | && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
| 8b030b38 | 2274 | { |
| ec911639 | 2275 | |
| f8c7b90f | 2276 | #ifdef PERL_OLD_COPY_ON_WRITE |
| ed252734 NC |
2277 | if (SvIsCOW(TARG)) { |
| 2278 | assert (!force_on_match); | |
| 2279 | goto have_a_cow; | |
| 2280 | } | |
| 2281 | #endif | |
| 71be2cbc | 2282 | if (force_on_match) { |
| 2283 | force_on_match = 0; | |
| 5c1648b0 | 2284 | s = SvPV_force_nomg(TARG, len); |
| 71be2cbc | 2285 | goto force_it; |
| 2286 | } | |
| 71be2cbc | 2287 | d = s; |
| 71be2cbc | 2288 | if (once) { |
| 20be6587 DM |
2289 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
| 2290 | rxtainted |= SUBST_TAINT_PAT; | |
| 07bc277f NC |
2291 | m = orig + RX_OFFS(rx)[0].start; |
| 2292 | d = orig + RX_OFFS(rx)[0].end; | |
| 71be2cbc | 2293 | s = orig; |
| 2294 | if (m - s > strend - d) { /* faster to shorten from end */ | |
| 2295 | if (clen) { | |
| 2296 | Copy(c, m, clen, char); | |
| 2297 | m += clen; | |
| a0d0e21e | 2298 | } |
| 71be2cbc | 2299 | i = strend - d; |
| 2300 | if (i > 0) { | |
| 2301 | Move(d, m, i, char); | |
| 2302 | m += i; | |
| a0d0e21e | 2303 | } |
| 71be2cbc | 2304 | *m = '\0'; |
| 2305 | SvCUR_set(TARG, m - s); | |
| 2306 | } | |
| 155aba94 | 2307 | else if ((i = m - s)) { /* faster from front */ |
| 71be2cbc | 2308 | d -= clen; |
| 2309 | m = d; | |
| 0d3c21b0 | 2310 | Move(s, d - i, i, char); |
| 71be2cbc | 2311 | sv_chop(TARG, d-i); |
| 71be2cbc | 2312 | if (clen) |
| 2313 | Copy(c, m, clen, char); | |
| 2314 | } | |
| 2315 | else if (clen) { | |
| 2316 | d -= clen; | |
| 2317 | sv_chop(TARG, d); | |
| 2318 | Copy(c, d, clen, char); | |
| 2319 | } | |
| 2320 | else { | |
| 2321 | sv_chop(TARG, d); | |
| 2322 | } | |
| 8ec5e241 | 2323 | SPAGAIN; |
| 8ca8a454 | 2324 | PUSHs(&PL_sv_yes); |
| 71be2cbc | 2325 | } |
| 2326 | else { | |
| 71be2cbc | 2327 | do { |
| 2328 | if (iters++ > maxiters) | |
| cea2e8a9 | 2329 | DIE(aTHX_ "Substitution loop"); |
| 20be6587 DM |
2330 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
| 2331 | rxtainted |= SUBST_TAINT_PAT; | |
| 07bc277f | 2332 | m = RX_OFFS(rx)[0].start + orig; |
| 155aba94 | 2333 | if ((i = m - s)) { |
| 71be2cbc | 2334 | if (s != d) |
| 2335 | Move(s, d, i, char); | |
| 2336 | d += i; | |
| a0d0e21e | 2337 | } |
| 71be2cbc | 2338 | if (clen) { |
| 2339 | Copy(c, d, clen, char); | |
| 2340 | d += clen; | |
| 2341 | } | |
| 07bc277f | 2342 | s = RX_OFFS(rx)[0].end + orig; |
| f9f4320a | 2343 | } while (CALLREGEXEC(rx, s, strend, orig, s == m, |
| f722798b IZ |
2344 | TARG, NULL, |
| 2345 | /* don't match same null twice */ | |
| 2346 | REXEC_NOT_FIRST|REXEC_IGNOREPOS)); | |
| 71be2cbc | 2347 | if (s != d) { |
| 2348 | i = strend - s; | |
| aa07b2f6 | 2349 | SvCUR_set(TARG, d - SvPVX_const(TARG) + i); |
| 71be2cbc | 2350 | Move(s, d, i+1, char); /* include the NUL */ |
| a0d0e21e | 2351 | } |
| 8ec5e241 | 2352 | SPAGAIN; |
| 8ca8a454 | 2353 | mPUSHi((I32)iters); |
| a0d0e21e LW |
2354 | } |
| 2355 | } | |
| ff6e92e8 | 2356 | else { |
| 1754320d FC |
2357 | bool first; |
| 2358 | SV *repl; | |
| a0d0e21e LW |
2359 | if (force_on_match) { |
| 2360 | force_on_match = 0; | |
| 0c1438a1 NC |
2361 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
| 2362 | /* I feel that it should be possible to avoid this mortal copy | |
| 2363 | given that the code below copies into a new destination. | |
| 2364 | However, I suspect it isn't worth the complexity of | |
| 2365 | unravelling the C<goto force_it> for the small number of | |
| 2366 | cases where it would be viable to drop into the copy code. */ | |
| 2367 | TARG = sv_2mortal(newSVsv(TARG)); | |
| 2368 | } | |
| 5c1648b0 | 2369 | s = SvPV_force_nomg(TARG, len); |
| a0d0e21e LW |
2370 | goto force_it; |
| 2371 | } | |
| f8c7b90f | 2372 | #ifdef PERL_OLD_COPY_ON_WRITE |
| ed252734 NC |
2373 | have_a_cow: |
| 2374 | #endif | |
| 20be6587 DM |
2375 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
| 2376 | rxtainted |= SUBST_TAINT_PAT; | |
| 1754320d | 2377 | repl = dstr; |
| 815dd406 | 2378 | dstr = newSVpvn_flags(m, s-m, SVs_TEMP | (DO_UTF8(TARG) ? SVf_UTF8 : 0)); |
| a0d0e21e | 2379 | if (!c) { |
| eb578fdb | 2380 | PERL_CONTEXT *cx; |
| 8ec5e241 | 2381 | SPAGAIN; |
| 20be6587 DM |
2382 | /* note that a whole bunch of local vars are saved here for |
| 2383 | * use by pp_substcont: here's a list of them in case you're | |
| 2384 | * searching for places in this sub that uses a particular var: | |
| 2385 | * iters maxiters r_flags oldsave rxtainted orig dstr targ | |
| 2386 | * s m strend rx once */ | |
| a0d0e21e | 2387 | PUSHSUBST(cx); |
| 20e98b0f | 2388 | RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot); |
| a0d0e21e | 2389 | } |
| cf93c79d | 2390 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
| 1754320d | 2391 | first = TRUE; |
| a0d0e21e LW |
2392 | do { |
| 2393 | if (iters++ > maxiters) | |
| cea2e8a9 | 2394 | DIE(aTHX_ "Substitution loop"); |
| 20be6587 DM |
2395 | if (RX_MATCH_TAINTED(rx)) |
| 2396 | rxtainted |= SUBST_TAINT_PAT; | |
| 07bc277f | 2397 | if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) { |
| a0d0e21e LW |
2398 | m = s; |
| 2399 | s = orig; | |
| 6502e081 | 2400 | assert(RX_SUBOFFSET(rx) == 0); |
| 07bc277f | 2401 | orig = RX_SUBBEG(rx); |
| a0d0e21e LW |
2402 | s = orig + (m - s); |
| 2403 | strend = s + (strend - m); | |
| 2404 | } | |
| 07bc277f | 2405 | m = RX_OFFS(rx)[0].start + orig; |
| 64534138 | 2406 | sv_catpvn_nomg_maybeutf8(dstr, s, m - s, DO_UTF8(TARG)); |
| 07bc277f | 2407 | s = RX_OFFS(rx)[0].end + orig; |
| 1754320d FC |
2408 | if (first) { |
| 2409 | /* replacement already stringified */ | |
| 2410 | if (clen) | |
| 64534138 | 2411 | sv_catpvn_nomg_maybeutf8(dstr, c, clen, doutf8); |
| 1754320d FC |
2412 | first = FALSE; |
| 2413 | } | |
| 2414 | else { | |
| 1754320d FC |
2415 | if (PL_encoding) { |
| 2416 | if (!nsv) nsv = sv_newmortal(); | |
| 2417 | sv_copypv(nsv, repl); | |
| 2418 | if (!DO_UTF8(nsv)) sv_recode_to_utf8(nsv, PL_encoding); | |
| 2419 | sv_catsv(dstr, nsv); | |
| 2420 | } | |
| 2421 | else sv_catsv(dstr, repl); | |
| bb933b9b FC |
2422 | if (SvTAINTED(repl)) |
| 2423 | rxtainted |= SUBST_TAINT_REPL; | |
| 1754320d | 2424 | } |
| a0d0e21e LW |
2425 | if (once) |
| 2426 | break; | |
| f9f4320a | 2427 | } while (CALLREGEXEC(rx, s, strend, orig, s == m, |
| ffc61ed2 | 2428 | TARG, NULL, r_flags)); |
| 64534138 | 2429 | sv_catpvn_nomg_maybeutf8(dstr, s, strend - s, DO_UTF8(TARG)); |
| 748a9306 | 2430 | |
| 8ca8a454 NC |
2431 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
| 2432 | /* From here on down we're using the copy, and leaving the original | |
| 2433 | untouched. */ | |
| 2434 | TARG = dstr; | |
| 2435 | SPAGAIN; | |
| 2436 | PUSHs(dstr); | |
| 2437 | } else { | |
| f8c7b90f | 2438 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 8ca8a454 NC |
2439 | /* The match may make the string COW. If so, brilliant, because |
| 2440 | that's just saved us one malloc, copy and free - the regexp has | |
| 2441 | donated the old buffer, and we malloc an entirely new one, rather | |
| 2442 | than the regexp malloc()ing a buffer and copying our original, | |
| 2443 | only for us to throw it away here during the substitution. */ | |
| 2444 | if (SvIsCOW(TARG)) { | |
| 2445 | sv_force_normal_flags(TARG, SV_COW_DROP_PV); | |
| 2446 | } else | |
| ed252734 | 2447 | #endif |
| 8ca8a454 NC |
2448 | { |
| 2449 | SvPV_free(TARG); | |
| 2450 | } | |
| 2451 | SvPV_set(TARG, SvPVX(dstr)); | |
| 2452 | SvCUR_set(TARG, SvCUR(dstr)); | |
| 2453 | SvLEN_set(TARG, SvLEN(dstr)); | |
| 64534138 | 2454 | SvFLAGS(TARG) |= SvUTF8(dstr); |
| 8ca8a454 | 2455 | SvPV_set(dstr, NULL); |
| 748a9306 | 2456 | |
| 8ca8a454 | 2457 | SPAGAIN; |
| 4f4d7508 | 2458 | mPUSHi((I32)iters); |
| 8ca8a454 NC |
2459 | } |
| 2460 | } | |
| 2461 | ||
| 2462 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT)) { | |
| 2463 | (void)SvPOK_only_UTF8(TARG); | |
| a0d0e21e | 2464 | } |
| 20be6587 | 2465 | |
| ef07e810 | 2466 | /* See "how taint works" above */ |
| 284167a5 | 2467 | if (TAINTING_get) { |
| 20be6587 DM |
2468 | if ((rxtainted & SUBST_TAINT_PAT) || |
| 2469 | ((rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) == | |
| 2470 | (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) | |
| 2471 | ) | |
| 2472 | (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */ | |
| 2473 | ||
| 2474 | if (!(rxtainted & SUBST_TAINT_BOOLRET) | |
| 2475 | && (rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT)) | |
| 2476 | ) | |
| 2477 | SvTAINTED_on(TOPs); /* taint return value */ | |
| 2478 | else | |
| 2479 | SvTAINTED_off(TOPs); /* may have got tainted earlier */ | |
| 2480 | ||
| 2481 | /* needed for mg_set below */ | |
| 284167a5 S |
2482 | TAINT_set( |
| 2483 | cBOOL(rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)) | |
| 2484 | ); | |
| 20be6587 DM |
2485 | SvTAINT(TARG); |
| 2486 | } | |
| 2487 | SvSETMAGIC(TARG); /* PL_tainted must be correctly set for this mg_set */ | |
| 2488 | TAINT_NOT; | |
| f1a76097 DM |
2489 | LEAVE_SCOPE(oldsave); |
| 2490 | RETURN; | |
| a0d0e21e LW |
2491 | } |
| 2492 | ||
| 2493 | PP(pp_grepwhile) | |
| 2494 | { | |
| 27da23d5 | 2495 | dVAR; dSP; |
| a0d0e21e LW |
2496 | |
| 2497 | if (SvTRUEx(POPs)) | |
| 3280af22 NIS |
2498 | PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr]; |
| 2499 | ++*PL_markstack_ptr; | |
| b2a2a901 | 2500 | FREETMPS; |
| d343c3ef | 2501 | LEAVE_with_name("grep_item"); /* exit inner scope */ |
| a0d0e21e LW |
2502 | |
| 2503 | /* All done yet? */ | |
| 3280af22 | 2504 | if (PL_stack_base + *PL_markstack_ptr > SP) { |
| a0d0e21e | 2505 | I32 items; |
| c4420975 | 2506 | const I32 gimme = GIMME_V; |
| a0d0e21e | 2507 | |
| d343c3ef | 2508 | LEAVE_with_name("grep"); /* exit outer scope */ |
| a0d0e21e | 2509 | (void)POPMARK; /* pop src */ |
| 3280af22 | 2510 | items = --*PL_markstack_ptr - PL_markstack_ptr[-1]; |
| a0d0e21e | 2511 | (void)POPMARK; /* pop dst */ |
| 3280af22 | 2512 | SP = PL_stack_base + POPMARK; /* pop original mark */ |
| 54310121 | 2513 | if (gimme == G_SCALAR) { |
| 7cc47870 | 2514 | if (PL_op->op_private & OPpGREP_LEX) { |
| c4420975 | 2515 | SV* const sv = sv_newmortal(); |
| 7cc47870 RGS |
2516 | sv_setiv(sv, items); |
| 2517 | PUSHs(sv); | |
| 2518 | } | |
| 2519 | else { | |
| 2520 | dTARGET; | |
| 2521 | XPUSHi(items); | |
| 2522 | } | |
| a0d0e21e | 2523 | } |
| 54310121 | 2524 | else if (gimme == G_ARRAY) |
| 2525 | SP += items; | |
| a0d0e21e LW |
2526 | RETURN; |
| 2527 | } | |
| 2528 | else { | |
| 2529 | SV *src; | |
| 2530 | ||
| d343c3ef | 2531 | ENTER_with_name("grep_item"); /* enter inner scope */ |
| 1d7c1841 | 2532 | SAVEVPTR(PL_curpm); |
| a0d0e21e | 2533 | |
| 3280af22 | 2534 | src = PL_stack_base[*PL_markstack_ptr]; |
| a0d0e21e | 2535 | SvTEMP_off(src); |
| 59f00321 RGS |
2536 | if (PL_op->op_private & OPpGREP_LEX) |
| 2537 | PAD_SVl(PL_op->op_targ) = src; | |
| 2538 | else | |
| 414bf5ae | 2539 | DEFSV_set(src); |
| a0d0e21e LW |
2540 | |
| 2541 | RETURNOP(cLOGOP->op_other); | |
| 2542 | } | |
| 2543 | } | |
| 2544 | ||
| 2545 | PP(pp_leavesub) | |
| 2546 | { | |
| 27da23d5 | 2547 | dVAR; dSP; |
| a0d0e21e LW |
2548 | SV **mark; |
| 2549 | SV **newsp; | |
| 2550 | PMOP *newpm; | |
| 2551 | I32 gimme; | |
| eb578fdb | 2552 | PERL_CONTEXT *cx; |
| b0d9ce38 | 2553 | SV *sv; |
| a0d0e21e | 2554 | |
| 9850bf21 RH |
2555 | if (CxMULTICALL(&cxstack[cxstack_ix])) |
| 2556 | return 0; | |
| 2557 | ||
| a0d0e21e | 2558 | POPBLOCK(cx,newpm); |
| 5dd42e15 | 2559 | cxstack_ix++; /* temporarily protect top context */ |
| 1c846c1f | 2560 | |
| a1f49e72 | 2561 | TAINT_NOT; |
| a0d0e21e LW |
2562 | if (gimme == G_SCALAR) { |
| 2563 | MARK = newsp + 1; | |
| a29cdaf0 | 2564 | if (MARK <= SP) { |
| a8bba7fa | 2565 | if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) { |
| 6f48390a FC |
2566 | if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1 |
| 2567 | && !SvMAGICAL(TOPs)) { | |
| a29cdaf0 IZ |
2568 | *MARK = SvREFCNT_inc(TOPs); |
| 2569 | FREETMPS; | |
| 2570 | sv_2mortal(*MARK); | |
| cd06dffe GS |
2571 | } |
| 2572 | else { | |
| 959e3673 | 2573 | sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */ |
| a29cdaf0 | 2574 | FREETMPS; |
| 959e3673 GS |
2575 | *MARK = sv_mortalcopy(sv); |
| 2576 | SvREFCNT_dec(sv); | |
| a29cdaf0 | 2577 | } |
| cd06dffe | 2578 | } |
| 6f48390a FC |
2579 | else if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1 |
| 2580 | && !SvMAGICAL(TOPs)) { | |
| 767eda44 | 2581 | *MARK = TOPs; |
| 767eda44 | 2582 | } |
| cd06dffe | 2583 | else |
| 767eda44 | 2584 | *MARK = sv_mortalcopy(TOPs); |
| cd06dffe GS |
2585 | } |
| 2586 | else { | |
| f86702cc | 2587 | MEXTEND(MARK, 0); |
| 3280af22 | 2588 | *MARK = &PL_sv_undef; |
| a0d0e21e LW |
2589 | } |
| 2590 | SP = MARK; | |
| 2591 | } | |
| 54310121 | 2592 | else if (gimme == G_ARRAY) { |
| f86702cc | 2593 | for (MARK = newsp + 1; MARK <= SP; MARK++) { |
| 6f48390a FC |
2594 | if (!SvTEMP(*MARK) || SvREFCNT(*MARK) != 1 |
| 2595 | || SvMAGICAL(*MARK)) { | |
| f86702cc | 2596 | *MARK = sv_mortalcopy(*MARK); |
| a1f49e72 CS |
2597 | TAINT_NOT; /* Each item is independent */ |
| 2598 | } | |
| f86702cc | 2599 | } |
| a0d0e21e | 2600 | } |
| f86702cc | 2601 | PUTBACK; |
| 1c846c1f | 2602 | |
| a57c6685 | 2603 | LEAVE; |
| 5dd42e15 | 2604 | cxstack_ix--; |
| b0d9ce38 | 2605 | POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */ |
| 3280af22 | 2606 | PL_curpm = newpm; /* ... and pop $1 et al */ |
| a0d0e21e | 2607 | |
| b0d9ce38 | 2608 | LEAVESUB(sv); |
| f39bc417 | 2609 | return cx->blk_sub.retop; |
| a0d0e21e LW |
2610 | } |
| 2611 | ||
| 2612 | PP(pp_entersub) | |
| 2613 | { | |
| 27da23d5 | 2614 | dVAR; dSP; dPOPss; |
| a0d0e21e | 2615 | GV *gv; |
| eb578fdb KW |
2616 | CV *cv; |
| 2617 | PERL_CONTEXT *cx; | |
| 5d94fbed | 2618 | I32 gimme; |
| a9c4fd4e | 2619 | const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0; |
| a0d0e21e LW |
2620 | |
| 2621 | if (!sv) | |
| cea2e8a9 | 2622 | DIE(aTHX_ "Not a CODE reference"); |
| a0d0e21e | 2623 | switch (SvTYPE(sv)) { |
| f1025168 NC |
2624 | /* This is overwhelming the most common case: */ |
| 2625 | case SVt_PVGV: | |
| 13be902c | 2626 | we_have_a_glob: |
| 159b6efe | 2627 | if (!(cv = GvCVu((const GV *)sv))) { |
| f730a42d | 2628 | HV *stash; |
| f2c0649b | 2629 | cv = sv_2cv(sv, &stash, &gv, 0); |
| f730a42d | 2630 | } |
| f1025168 | 2631 | if (!cv) { |
| a57c6685 | 2632 | ENTER; |
| f1025168 NC |
2633 | SAVETMPS; |
| 2634 | goto try_autoload; | |
| 2635 | } | |
| 2636 | break; | |
| 13be902c FC |
2637 | case SVt_PVLV: |
| 2638 | if(isGV_with_GP(sv)) goto we_have_a_glob; | |
| 2639 | /*FALLTHROUGH*/ | |
| a0d0e21e | 2640 | default: |
| 7c75014e DM |
2641 | if (sv == &PL_sv_yes) { /* unfound import, ignore */ |
| 2642 | if (hasargs) | |
| 2643 | SP = PL_stack_base + POPMARK; | |
| 4d198de3 DM |
2644 | else |
| 2645 | (void)POPMARK; | |
| 7c75014e DM |
2646 | RETURN; |
| 2647 | } | |
| 2648 | SvGETMAGIC(sv); | |
| 2649 | if (SvROK(sv)) { | |
| 93d7320b DM |
2650 | if (SvAMAGIC(sv)) { |
| 2651 | sv = amagic_deref_call(sv, to_cv_amg); | |
| 2652 | /* Don't SPAGAIN here. */ | |
| 2653 | } | |
| 7c75014e DM |
2654 | } |
| 2655 | else { | |
| a9c4fd4e | 2656 | const char *sym; |
| 780a5241 | 2657 | STRLEN len; |
| 79a3e5ea | 2658 | if (!SvOK(sv)) |
| cea2e8a9 | 2659 | DIE(aTHX_ PL_no_usym, "a subroutine"); |
| 79a3e5ea | 2660 | sym = SvPV_nomg_const(sv, len); |
| 533c011a | 2661 | if (PL_op->op_private & HINT_STRICT_REFS) |
| b375e37b | 2662 | DIE(aTHX_ "Can't use string (\"%" SVf32 "\"%s) as a subroutine ref while \"strict refs\" in use", sv, len>32 ? "..." : ""); |
| 780a5241 | 2663 | cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv)); |
| a0d0e21e LW |
2664 | break; |
| 2665 | } | |
| ea726b52 | 2666 | cv = MUTABLE_CV(SvRV(sv)); |
| a0d0e21e LW |
2667 | if (SvTYPE(cv) == SVt_PVCV) |
| 2668 | break; | |
| 2669 | /* FALL THROUGH */ | |
| 2670 | case SVt_PVHV: | |
| 2671 | case SVt_PVAV: | |
| cea2e8a9 | 2672 | DIE(aTHX_ "Not a CODE reference"); |
| f1025168 | 2673 | /* This is the second most common case: */ |
| a0d0e21e | 2674 | case SVt_PVCV: |
| ea726b52 | 2675 | cv = MUTABLE_CV(sv); |
| a0d0e21e | 2676 | break; |
| a0d0e21e LW |
2677 | } |
| 2678 | ||
| a57c6685 | 2679 | ENTER; |
| a0d0e21e LW |
2680 | SAVETMPS; |
| 2681 | ||
| 2682 | retry: | |
| 541ed3a9 FC |
2683 | if (CvCLONE(cv) && ! CvCLONED(cv)) |
| 2684 | DIE(aTHX_ "Closure prototype called"); | |
| a0d0e21e | 2685 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
| 2f349aa0 NC |
2686 | GV* autogv; |
| 2687 | SV* sub_name; | |
| 2688 | ||
| 2689 | /* anonymous or undef'd function leaves us no recourse */ | |
| 7d2057d8 FC |
2690 | if (CvANON(cv) || !(gv = CvGV(cv))) { |
| 2691 | if (CvNAMED(cv)) | |
| 2692 | DIE(aTHX_ "Undefined subroutine &%"HEKf" called", | |
| 2693 | HEKfARG(CvNAME_HEK(cv))); | |
| 2f349aa0 | 2694 | DIE(aTHX_ "Undefined subroutine called"); |
| 7d2057d8 | 2695 | } |
| 2f349aa0 NC |
2696 | |
| 2697 | /* autoloaded stub? */ | |
| 2698 | if (cv != GvCV(gv)) { | |
| 2699 | cv = GvCV(gv); | |
| 2700 | } | |
| 2701 | /* should call AUTOLOAD now? */ | |
| 2702 | else { | |
| 7e623da3 | 2703 | try_autoload: |
| d1089224 BF |
2704 | if ((autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), |
| 2705 | GvNAMEUTF8(gv) ? SVf_UTF8 : 0))) | |
| 2f349aa0 NC |
2706 | { |
| 2707 | cv = GvCV(autogv); | |
| 2708 | } | |
| 2f349aa0 | 2709 | else { |
| c220e1a1 | 2710 | sorry: |
| 2f349aa0 | 2711 | sub_name = sv_newmortal(); |
| 6136c704 | 2712 | gv_efullname3(sub_name, gv, NULL); |
| be2597df | 2713 | DIE(aTHX_ "Undefined subroutine &%"SVf" called", SVfARG(sub_name)); |
| 2f349aa0 NC |
2714 | } |
| 2715 | } | |
| 2716 | if (!cv) | |
| c220e1a1 | 2717 | goto sorry; |
| 2f349aa0 | 2718 | goto retry; |
| a0d0e21e LW |
2719 | } |
| 2720 | ||
| 54310121 | 2721 | gimme = GIMME_V; |
| 67caa1fe | 2722 | if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) { |
| 005a8a35 | 2723 | Perl_get_db_sub(aTHX_ &sv, cv); |
| a9ef256d NC |
2724 | if (CvISXSUB(cv)) |
| 2725 | PL_curcopdb = PL_curcop; | |
| 1ad62f64 BR |
2726 | if (CvLVALUE(cv)) { |
| 2727 | /* check for lsub that handles lvalue subroutines */ | |
| ae5c1e95 | 2728 | cv = GvCV(gv_HVadd(gv_fetchpvs("DB::lsub", GV_ADDMULTI, SVt_PVHV))); |
| 1ad62f64 BR |
2729 | /* if lsub not found then fall back to DB::sub */ |
| 2730 | if (!cv) cv = GvCV(PL_DBsub); | |
| 2731 | } else { | |
| 2732 | cv = GvCV(PL_DBsub); | |
| 2733 | } | |
| a9ef256d | 2734 | |
| ccafdc96 RGS |
2735 | if (!cv || (!CvXSUB(cv) && !CvSTART(cv))) |
| 2736 | DIE(aTHX_ "No DB::sub routine defined"); | |
| 67caa1fe | 2737 | } |
| a0d0e21e | 2738 | |
| aed2304a | 2739 | if (!(CvISXSUB(cv))) { |
| f1025168 | 2740 | /* This path taken at least 75% of the time */ |
| a0d0e21e | 2741 | dMARK; |
| eb578fdb | 2742 | I32 items = SP - MARK; |
| b70d5558 | 2743 | PADLIST * const padlist = CvPADLIST(cv); |
| a0d0e21e LW |
2744 | PUSHBLOCK(cx, CXt_SUB, MARK); |
| 2745 | PUSHSUB(cx); | |
| f39bc417 | 2746 | cx->blk_sub.retop = PL_op->op_next; |
| a0d0e21e | 2747 | CvDEPTH(cv)++; |
| 3a76ca88 RGS |
2748 | if (CvDEPTH(cv) >= 2) { |
| 2749 | PERL_STACK_OVERFLOW_CHECK(); | |
| 2750 | pad_push(padlist, CvDEPTH(cv)); | |
| a0d0e21e | 2751 | } |
| 3a76ca88 RGS |
2752 | SAVECOMPPAD(); |
| 2753 | PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); | |
| 2754 | if (hasargs) { | |
| 10533ace | 2755 | AV *const av = MUTABLE_AV(PAD_SVl(0)); |
| 221373f0 GS |
2756 | if (AvREAL(av)) { |
| 2757 | /* @_ is normally not REAL--this should only ever | |
| 2758 | * happen when DB::sub() calls things that modify @_ */ | |
| 2759 | av_clear(av); | |
| 2760 | AvREAL_off(av); | |
| 2761 | AvREIFY_on(av); | |
| 2762 | } | |
| 3280af22 | 2763 | cx->blk_sub.savearray = GvAV(PL_defgv); |
| 502c6561 | 2764 | GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av)); |
| dd2155a4 | 2765 | CX_CURPAD_SAVE(cx->blk_sub); |
| 6d4ff0d2 | 2766 | cx->blk_sub.argarray = av; |
| a0d0e21e LW |
2767 | ++MARK; |
| 2768 | ||
| 2769 | if (items > AvMAX(av) + 1) { | |
| 504618e9 | 2770 | SV **ary = AvALLOC(av); |
| a0d0e21e LW |
2771 | if (AvARRAY(av) != ary) { |
| 2772 | AvMAX(av) += AvARRAY(av) - AvALLOC(av); | |
| 9c6bc640 | 2773 | AvARRAY(av) = ary; |
| a0d0e21e LW |
2774 | } |
| 2775 | if (items > AvMAX(av) + 1) { | |
| 2776 | AvMAX(av) = items - 1; | |
| 2777 | Renew(ary,items,SV*); | |
| 2778 | AvALLOC(av) = ary; | |
| 9c6bc640 | 2779 | AvARRAY(av) = ary; |
| a0d0e21e LW |
2780 | } |
| 2781 | } | |
| 2782 | Copy(MARK,AvARRAY(av),items,SV*); | |
| 93965878 | 2783 | AvFILLp(av) = items - 1; |
| 1c846c1f | 2784 | |
| a0d0e21e LW |
2785 | while (items--) { |
| 2786 | if (*MARK) | |
| 2787 | SvTEMP_off(*MARK); | |
| 2788 | MARK++; | |
| 2789 | } | |
| 2790 | } | |
| da1dff94 FC |
2791 | if ((cx->blk_u16 & OPpENTERSUB_LVAL_MASK) == OPpLVAL_INTRO && |
| 2792 | !CvLVALUE(cv)) | |
| 2793 | DIE(aTHX_ "Can't modify non-lvalue subroutine call"); | |
| 4a925ff6 GS |
2794 | /* warning must come *after* we fully set up the context |
| 2795 | * stuff so that __WARN__ handlers can safely dounwind() | |
| 2796 | * if they want to | |
| 2797 | */ | |
| 2b9dff67 | 2798 | if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION) |
| 4a925ff6 GS |
2799 | && !(PERLDB_SUB && cv == GvCV(PL_DBsub))) |
| 2800 | sub_crush_depth(cv); | |
| a0d0e21e LW |
2801 | RETURNOP(CvSTART(cv)); |
| 2802 | } | |
| f1025168 | 2803 | else { |
| 3a76ca88 | 2804 | I32 markix = TOPMARK; |
| f1025168 | 2805 | |
| 3a76ca88 | 2806 | PUTBACK; |
| f1025168 | 2807 | |
| 3a76ca88 RGS |
2808 | if (!hasargs) { |
| 2809 | /* Need to copy @_ to stack. Alternative may be to | |
| 2810 | * switch stack to @_, and copy return values | |
| 2811 | * back. This would allow popping @_ in XSUB, e.g.. XXXX */ | |
| 2812 | AV * const av = GvAV(PL_defgv); | |
| 2813 | const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */ | |
| 2814 | ||
| 2815 | if (items) { | |
| 2816 | /* Mark is at the end of the stack. */ | |
| 2817 | EXTEND(SP, items); | |
| 2818 | Copy(AvARRAY(av), SP + 1, items, SV*); | |
| 2819 | SP += items; | |
| 2820 | PUTBACK ; | |
| 2821 | } | |
| 2822 | } | |
| 2823 | /* We assume first XSUB in &DB::sub is the called one. */ | |
| 2824 | if (PL_curcopdb) { | |
| 2825 | SAVEVPTR(PL_curcop); | |
| 2826 | PL_curcop = PL_curcopdb; | |
| 2827 | PL_curcopdb = NULL; | |
| 2828 | } | |
| 2829 | /* Do we need to open block here? XXXX */ | |
| 72df79cf GF |
2830 | |
| 2831 | /* CvXSUB(cv) must not be NULL because newXS() refuses NULL xsub address */ | |
| 2832 | assert(CvXSUB(cv)); | |
| 16c91539 | 2833 | CvXSUB(cv)(aTHX_ cv); |
| 3a76ca88 RGS |
2834 | |
| 2835 | /* Enforce some sanity in scalar context. */ | |
| 2836 | if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) { | |
| 2837 | if (markix > PL_stack_sp - PL_stack_base) | |
| 2838 | *(PL_stack_base + markix) = &PL_sv_undef; | |
| 2839 | else | |
| 2840 | *(PL_stack_base + markix) = *PL_stack_sp; | |
| 2841 | PL_stack_sp = PL_stack_base + markix; | |
| 2842 | } | |
| a57c6685 | 2843 | LEAVE; |
| f1025168 NC |
2844 | return NORMAL; |
| 2845 | } | |
| a0d0e21e LW |
2846 | } |
| 2847 | ||
| 44a8e56a | 2848 | void |
| 864dbfa3 | 2849 | Perl_sub_crush_depth(pTHX_ CV *cv) |
| 44a8e56a | 2850 | { |
| 7918f24d NC |
2851 | PERL_ARGS_ASSERT_SUB_CRUSH_DEPTH; |
| 2852 | ||
| 44a8e56a | 2853 | if (CvANON(cv)) |
| 9014280d | 2854 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine"); |
| 44a8e56a | 2855 | else { |
| aec46f14 | 2856 | SV* const tmpstr = sv_newmortal(); |
| 6136c704 | 2857 | gv_efullname3(tmpstr, CvGV(cv), NULL); |
| 35c1215d | 2858 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"", |
| be2597df | 2859 | SVfARG(tmpstr)); |
| 44a8e56a | 2860 | } |
| 2861 | } | |
| 2862 | ||
| a0d0e21e LW |
2863 | PP(pp_aelem) |
| 2864 | { | |
| 97aff369 | 2865 | dVAR; dSP; |
| a0d0e21e | 2866 | SV** svp; |
| a3b680e6 | 2867 | SV* const elemsv = POPs; |
| d804643f | 2868 | IV elem = SvIV(elemsv); |
| 502c6561 | 2869 | AV *const av = MUTABLE_AV(POPs); |
| e1ec3a88 AL |
2870 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
| 2871 | const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av)); | |
| 4ad10a0b VP |
2872 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
| 2873 | bool preeminent = TRUE; | |
| be6c24e0 | 2874 | SV *sv; |
| a0d0e21e | 2875 | |
| e35c1634 | 2876 | if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC)) |
| 95b63a38 JH |
2877 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
| 2878 | "Use of reference \"%"SVf"\" as array index", | |
| be2597df | 2879 | SVfARG(elemsv)); |
| a0d0e21e LW |
2880 | if (SvTYPE(av) != SVt_PVAV) |
| 2881 | RETPUSHUNDEF; | |
| 4ad10a0b VP |
2882 | |
| 2883 | if (localizing) { | |
| 2884 | MAGIC *mg; | |
| 2885 | HV *stash; | |
| 2886 | ||
| 2887 | /* If we can determine whether the element exist, | |
| 2888 | * Try to preserve the existenceness of a tied array | |
| 2889 | * element by using EXISTS and DELETE if possible. | |
| 2890 | * Fallback to FETCH and STORE otherwise. */ | |
| 2891 | if (SvCANEXISTDELETE(av)) | |
| 2892 | preeminent = av_exists(av, elem); | |
| 2893 | } | |
| 2894 | ||
| 68dc0745 | 2895 | svp = av_fetch(av, elem, lval && !defer); |
| a0d0e21e | 2896 | if (lval) { |
| 2b573ace | 2897 | #ifdef PERL_MALLOC_WRAP |
| 2b573ace | 2898 | if (SvUOK(elemsv)) { |
| a9c4fd4e | 2899 | const UV uv = SvUV(elemsv); |
| 2b573ace JH |
2900 | elem = uv > IV_MAX ? IV_MAX : uv; |
| 2901 | } | |
| 2902 | else if (SvNOK(elemsv)) | |
| 2903 | elem = (IV)SvNV(elemsv); | |
| a3b680e6 AL |
2904 | if (elem > 0) { |
| 2905 | static const char oom_array_extend[] = | |
| 2906 | "Out of memory during array extend"; /* Duplicated in av.c */ | |
| 2b573ace | 2907 | MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend); |
| a3b680e6 | 2908 | } |
| 2b573ace | 2909 | #endif |
| 3280af22 | 2910 | if (!svp || *svp == &PL_sv_undef) { |
| 68dc0745 | 2911 | SV* lv; |
| 2912 | if (!defer) | |
| cea2e8a9 | 2913 | DIE(aTHX_ PL_no_aelem, elem); |
| 68dc0745 | 2914 | lv = sv_newmortal(); |
| 2915 | sv_upgrade(lv, SVt_PVLV); | |
| 2916 | LvTYPE(lv) = 'y'; | |
| a0714e2c | 2917 | sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0); |
| b37c2d43 | 2918 | LvTARG(lv) = SvREFCNT_inc_simple(av); |
| 68dc0745 | 2919 | LvTARGOFF(lv) = elem; |
| 2920 | LvTARGLEN(lv) = 1; | |
| 2921 | PUSHs(lv); | |
| 2922 | RETURN; | |
| 2923 | } | |
| 4ad10a0b VP |
2924 | if (localizing) { |
| 2925 | if (preeminent) | |
| 2926 | save_aelem(av, elem, svp); | |
| 2927 | else | |
| 2928 | SAVEADELETE(av, elem); | |
| 2929 | } | |
| 9026059d GG |
2930 | else if (PL_op->op_private & OPpDEREF) { |
| 2931 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
| 2932 | RETURN; | |
| 2933 | } | |
| a0d0e21e | 2934 | } |
| 3280af22 | 2935 | sv = (svp ? *svp : &PL_sv_undef); |
| 39cf747a | 2936 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
| fd69380d | 2937 | mg_get(sv); |
| be6c24e0 | 2938 | PUSHs(sv); |
| a0d0e21e LW |
2939 | RETURN; |
| 2940 | } | |
| 2941 | ||
| 9026059d | 2942 | SV* |
| 864dbfa3 | 2943 | Perl_vivify_ref(pTHX_ SV *sv, U32 to_what) |
| 02a9e968 | 2944 | { |
| 7918f24d NC |
2945 | PERL_ARGS_ASSERT_VIVIFY_REF; |
| 2946 | ||
| 5b295bef | 2947 | SvGETMAGIC(sv); |
| 02a9e968 CS |
2948 | if (!SvOK(sv)) { |
| 2949 | if (SvREADONLY(sv)) | |
| cb077ed2 | 2950 | Perl_croak_no_modify(); |
| 43230e26 | 2951 | prepare_SV_for_RV(sv); |
| 68dc0745 | 2952 | switch (to_what) { |
| 5f05dabc | 2953 | case OPpDEREF_SV: |
| 561b68a9 | 2954 | SvRV_set(sv, newSV(0)); |
| 5f05dabc | 2955 | break; |
| 2956 | case OPpDEREF_AV: | |
| ad64d0ec | 2957 | SvRV_set(sv, MUTABLE_SV(newAV())); |
| 5f05dabc | 2958 | break; |
| 2959 | case OPpDEREF_HV: | |
| ad64d0ec | 2960 | SvRV_set(sv, MUTABLE_SV(newHV())); |
| 5f05dabc | 2961 | break; |
| 2962 | } | |
| 02a9e968 CS |
2963 | SvROK_on(sv); |
| 2964 | SvSETMAGIC(sv); | |
| 7e482323 | 2965 | SvGETMAGIC(sv); |
| 02a9e968 | 2966 | } |
| 9026059d GG |
2967 | if (SvGMAGICAL(sv)) { |
| 2968 | /* copy the sv without magic to prevent magic from being | |
| 2969 | executed twice */ | |
| 2970 | SV* msv = sv_newmortal(); | |
| 2971 | sv_setsv_nomg(msv, sv); | |
| 2972 | return msv; | |
| 2973 | } | |
| 2974 | return sv; | |
| 02a9e968 CS |
2975 | } |
| 2976 | ||
| a0d0e21e LW |
2977 | PP(pp_method) |
| 2978 | { | |
| 97aff369 | 2979 | dVAR; dSP; |
| 890ce7af | 2980 | SV* const sv = TOPs; |
| f5d5a27c CS |
2981 | |
| 2982 | if (SvROK(sv)) { | |
| 890ce7af | 2983 | SV* const rsv = SvRV(sv); |
| f5d5a27c CS |
2984 | if (SvTYPE(rsv) == SVt_PVCV) { |
| 2985 | SETs(rsv); | |
| 2986 | RETURN; | |
| 2987 | } | |
| 2988 | } | |
| 2989 | ||
| 4608196e | 2990 | SETs(method_common(sv, NULL)); |
| f5d5a27c CS |
2991 | RETURN; |
| 2992 | } | |
| 2993 | ||
| 2994 | PP(pp_method_named) | |
| 2995 | { | |
| 97aff369 | 2996 | dVAR; dSP; |
| 890ce7af | 2997 | SV* const sv = cSVOP_sv; |
| c158a4fd | 2998 | U32 hash = SvSHARED_HASH(sv); |
| f5d5a27c CS |
2999 | |
| 3000 | XPUSHs(method_common(sv, &hash)); | |
| 3001 | RETURN; | |
| 3002 | } | |
| 3003 | ||
| 3004 | STATIC SV * | |
| 3005 | S_method_common(pTHX_ SV* meth, U32* hashp) | |
| 3006 | { | |
| 97aff369 | 3007 | dVAR; |
| a0d0e21e LW |
3008 | SV* ob; |
| 3009 | GV* gv; | |
| 56304f61 | 3010 | HV* stash; |
| a0714e2c | 3011 | SV *packsv = NULL; |
| f226e9be FC |
3012 | SV * const sv = PL_stack_base + TOPMARK == PL_stack_sp |
| 3013 | ? (Perl_croak(aTHX_ "Can't call method \"%"SVf"\" without a " | |
| 3014 | "package or object reference", SVfARG(meth)), | |
| 3015 | (SV *)NULL) | |
| 3016 | : *(PL_stack_base + TOPMARK + 1); | |
| f5d5a27c | 3017 | |
| 7918f24d NC |
3018 | PERL_ARGS_ASSERT_METHOD_COMMON; |
| 3019 | ||
| 4f1b7578 | 3020 | if (!sv) |
| 7156e69a | 3021 | undefined: |
| a214957f VP |
3022 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" on an undefined value", |
| 3023 | SVfARG(meth)); | |
| 4f1b7578 | 3024 | |
| 5b295bef | 3025 | SvGETMAGIC(sv); |
| a0d0e21e | 3026 | if (SvROK(sv)) |
| ad64d0ec | 3027 | ob = MUTABLE_SV(SvRV(sv)); |
| 7156e69a | 3028 | else if (!SvOK(sv)) goto undefined; |
| a0d0e21e | 3029 | else { |
| 89269094 | 3030 | /* this isn't a reference */ |
| a0d0e21e | 3031 | GV* iogv; |
| f937af42 | 3032 | STRLEN packlen; |
| 89269094 | 3033 | const char * const packname = SvPV_nomg_const(sv, packlen); |
| b3ebc221 | 3034 | const bool packname_is_utf8 = !!SvUTF8(sv); |
| 89269094 | 3035 | const HE* const he = |
| b3ebc221 NC |
3036 | (const HE *)hv_common( |
| 3037 | PL_stashcache, NULL, packname, packlen, | |
| 3038 | packname_is_utf8 ? HVhek_UTF8 : 0, 0, NULL, 0 | |
| da6b625f FC |
3039 | ); |
| 3040 | ||
| 89269094 | 3041 | if (he) { |
| 5e6396ae | 3042 | stash = INT2PTR(HV*,SvIV(HeVAL(he))); |
| 103f5a36 NC |
3043 | DEBUG_o(Perl_deb(aTHX_ "PL_stashcache hit %p for '%"SVf"'\n", |
| 3044 | stash, sv)); | |
| 081fc587 | 3045 | goto fetch; |
| 081fc587 AB |
3046 | } |
| 3047 | ||
| 89269094 | 3048 | if (!(iogv = gv_fetchpvn_flags( |
| da6b625f FC |
3049 | packname, packlen, SVf_UTF8 * packname_is_utf8, SVt_PVIO |
| 3050 | )) || | |
| ad64d0ec | 3051 | !(ob=MUTABLE_SV(GvIO(iogv)))) |
| a0d0e21e | 3052 | { |
| af09ea45 | 3053 | /* this isn't the name of a filehandle either */ |
| 89269094 | 3054 | if (!packlen) |
| 834a4ddd | 3055 | { |
| 7156e69a FC |
3056 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" " |
| 3057 | "without a package or object reference", | |
| 3058 | SVfARG(meth)); | |
| 834a4ddd | 3059 | } |
| af09ea45 | 3060 | /* assume it's a package name */ |
| f937af42 | 3061 | stash = gv_stashpvn(packname, packlen, packname_is_utf8 ? SVf_UTF8 : 0); |
| 0dae17bd GS |
3062 | if (!stash) |
| 3063 | packsv = sv; | |
| 081fc587 | 3064 | else { |
| d4c19fe8 | 3065 | SV* const ref = newSViv(PTR2IV(stash)); |
| f937af42 | 3066 | (void)hv_store(PL_stashcache, packname, |
| c60dbbc3 | 3067 | packname_is_utf8 ? -(I32)packlen : (I32)packlen, ref, 0); |
| 103f5a36 NC |
3068 | DEBUG_o(Perl_deb(aTHX_ "PL_stashcache caching %p for '%"SVf"'\n", |
| 3069 | stash, sv)); | |
| 7e8961ec | 3070 | } |
| ac91690f | 3071 | goto fetch; |
| a0d0e21e | 3072 | } |
| af09ea45 | 3073 | /* it _is_ a filehandle name -- replace with a reference */ |
| ad64d0ec | 3074 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(MUTABLE_SV(iogv))); |
| a0d0e21e LW |
3075 | } |
| 3076 | ||
| af09ea45 | 3077 | /* if we got here, ob should be a reference or a glob */ |
| f0d43078 | 3078 | if (!ob || !(SvOBJECT(ob) |
| 6e592b3a BM |
3079 | || (SvTYPE(ob) == SVt_PVGV |
| 3080 | && isGV_with_GP(ob) | |
| 159b6efe | 3081 | && (ob = MUTABLE_SV(GvIO((const GV *)ob))) |
| f0d43078 GS |
3082 | && SvOBJECT(ob)))) |
| 3083 | { | |
| b375e37b BF |
3084 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" on unblessed reference", |
| 3085 | SVfARG((SvSCREAM(meth) && strEQ(SvPV_nolen_const(meth),"isa")) | |
| 3086 | ? newSVpvs_flags("DOES", SVs_TEMP) | |
| 3087 | : meth)); | |
| f0d43078 | 3088 | } |
| a0d0e21e | 3089 | |
| 56304f61 | 3090 | stash = SvSTASH(ob); |
| a0d0e21e | 3091 | |
| ac91690f | 3092 | fetch: |
| af09ea45 IK |
3093 | /* NOTE: stash may be null, hope hv_fetch_ent and |
| 3094 | gv_fetchmethod can cope (it seems they can) */ | |
| 3095 | ||
| f5d5a27c CS |
3096 | /* shortcut for simple names */ |
| 3097 | if (hashp) { | |
| b464bac0 | 3098 | const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp); |
| f5d5a27c | 3099 | if (he) { |
| 159b6efe | 3100 | gv = MUTABLE_GV(HeVAL(he)); |
| f5d5a27c | 3101 | if (isGV(gv) && GvCV(gv) && |
| e1a479c5 | 3102 | (!GvCVGEN(gv) || GvCVGEN(gv) |
| dd69841b | 3103 | == (PL_sub_generation + HvMROMETA(stash)->cache_gen))) |
| ad64d0ec | 3104 | return MUTABLE_SV(GvCV(gv)); |
| f5d5a27c CS |
3105 | } |
| 3106 | } | |
| 3107 | ||
| f937af42 BF |
3108 | gv = gv_fetchmethod_sv_flags(stash ? stash : MUTABLE_HV(packsv), |
| 3109 | meth, GV_AUTOLOAD | GV_CROAK); | |
| 9b9d0b15 | 3110 | |
| 256d1bb2 | 3111 | assert(gv); |
| 9b9d0b15 | 3112 | |
| ad64d0ec | 3113 | return isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv); |
| a0d0e21e | 3114 | } |
| 241d1a3b NC |
3115 | |
| 3116 | /* | |
| 3117 | * Local variables: | |
| 3118 | * c-indentation-style: bsd | |
| 3119 | * c-basic-offset: 4 | |
| 14d04a33 | 3120 | * indent-tabs-mode: nil |
| 241d1a3b NC |
3121 | * End: |
| 3122 | * | |
| 14d04a33 | 3123 | * ex: set ts=8 sts=4 sw=4 et: |
| 37442d52 | 3124 | */ |