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 | ||
| a7fd8ef6 DM |
309 | /* ($lex1,@lex2,...) or my ($lex1,@lex2,...) */ |
| 310 | ||
| 311 | PP(pp_padrange) | |
| 312 | { | |
| 313 | dVAR; dSP; | |
| 314 | PADOFFSET base = PL_op->op_targ; | |
| 315 | int count = (int)(PL_op->op_private) & OPpPADRANGE_COUNTMASK; | |
| 316 | int i; | |
| 317 | /* note, this is only skipped for compile-time-known void cxt */ | |
| 318 | if ((PL_op->op_flags & OPf_WANT) != OPf_WANT_VOID) { | |
| 319 | EXTEND(SP, count); | |
| 320 | PUSHMARK(SP); | |
| 321 | for (i = 0; i <count; i++) | |
| 322 | *++SP = PAD_SV(base+i); | |
| 323 | } | |
| 324 | if (PL_op->op_private & OPpLVAL_INTRO) { | |
| 325 | for (i = 0; i <count; i++) | |
| 326 | SAVECLEARSV(PAD_SVl(base+i)); | |
| 327 | } | |
| 328 | RETURN; | |
| 329 | } | |
| 330 | ||
| 331 | ||
| a0d0e21e LW |
332 | PP(pp_padsv) |
| 333 | { | |
| 97aff369 | 334 | dVAR; dSP; dTARGET; |
| a0d0e21e | 335 | XPUSHs(TARG); |
| 533c011a NIS |
336 | if (PL_op->op_flags & OPf_MOD) { |
| 337 | if (PL_op->op_private & OPpLVAL_INTRO) | |
| 952306ac RGS |
338 | if (!(PL_op->op_private & OPpPAD_STATE)) |
| 339 | SAVECLEARSV(PAD_SVl(PL_op->op_targ)); | |
| a62b51b8 | 340 | if (PL_op->op_private & OPpDEREF) { |
| 8ec5e241 | 341 | PUTBACK; |
| 9026059d | 342 | TOPs = vivify_ref(TOPs, PL_op->op_private & OPpDEREF); |
| 8ec5e241 NIS |
343 | SPAGAIN; |
| 344 | } | |
| 4633a7c4 | 345 | } |
| a0d0e21e LW |
346 | RETURN; |
| 347 | } | |
| 348 | ||
| 349 | PP(pp_readline) | |
| 350 | { | |
| 97aff369 | 351 | dVAR; |
| 30901a8a FC |
352 | dSP; |
| 353 | if (TOPs) { | |
| 354 | SvGETMAGIC(TOPs); | |
| 67288365 | 355 | tryAMAGICunTARGETlist(iter_amg, 0, 0); |
| 30901a8a FC |
356 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
| 357 | } | |
| 358 | else PL_last_in_gv = PL_argvgv, PL_stack_sp--; | |
| 6e592b3a BM |
359 | if (!isGV_with_GP(PL_last_in_gv)) { |
| 360 | if (SvROK(PL_last_in_gv) && isGV_with_GP(SvRV(PL_last_in_gv))) | |
| 159b6efe | 361 | PL_last_in_gv = MUTABLE_GV(SvRV(PL_last_in_gv)); |
| 8efb3254 | 362 | else { |
| f5284f61 | 363 | dSP; |
| ad64d0ec | 364 | XPUSHs(MUTABLE_SV(PL_last_in_gv)); |
| f5284f61 | 365 | PUTBACK; |
| 897d3989 | 366 | Perl_pp_rv2gv(aTHX); |
| 159b6efe | 367 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
| f5284f61 IZ |
368 | } |
| 369 | } | |
| a0d0e21e LW |
370 | return do_readline(); |
| 371 | } | |
| 372 | ||
| 373 | PP(pp_eq) | |
| 374 | { | |
| 6f1401dc | 375 | dVAR; dSP; |
| 33efebe6 DM |
376 | SV *left, *right; |
| 377 | ||
| a42d0242 | 378 | tryAMAGICbin_MG(eq_amg, AMGf_set|AMGf_numeric); |
| 33efebe6 DM |
379 | right = POPs; |
| 380 | left = TOPs; | |
| 381 | SETs(boolSV( | |
| 382 | (SvIOK_notUV(left) && SvIOK_notUV(right)) | |
| 383 | ? (SvIVX(left) == SvIVX(right)) | |
| 384 | : ( do_ncmp(left, right) == 0) | |
| 385 | )); | |
| 386 | RETURN; | |
| a0d0e21e LW |
387 | } |
| 388 | ||
| 389 | PP(pp_preinc) | |
| 390 | { | |
| 97aff369 | 391 | dVAR; dSP; |
| 17058fe0 FC |
392 | const bool inc = |
| 393 | PL_op->op_type == OP_PREINC || PL_op->op_type == OP_I_PREINC; | |
| 60092ce4 | 394 | if (SvTYPE(TOPs) >= SVt_PVAV || (isGV_with_GP(TOPs) && !SvFAKE(TOPs))) |
| 6ad8f254 | 395 | Perl_croak_no_modify(aTHX); |
| 4bac9ae4 | 396 | if (!SvREADONLY(TOPs) && !SvGMAGICAL(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) |
| 17058fe0 | 397 | && SvIVX(TOPs) != (inc ? IV_MAX : IV_MIN)) |
| 55497cff | 398 | { |
| 17058fe0 | 399 | SvIV_set(TOPs, SvIVX(TOPs) + (inc ? 1 : -1)); |
| 55497cff | 400 | SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK); |
| 748a9306 | 401 | } |
| 28e5dec8 | 402 | else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */ |
| 17058fe0 FC |
403 | if (inc) sv_inc(TOPs); |
| 404 | else sv_dec(TOPs); | |
| a0d0e21e LW |
405 | SvSETMAGIC(TOPs); |
| 406 | return NORMAL; | |
| 407 | } | |
| 408 | ||
| 409 | PP(pp_or) | |
| 410 | { | |
| 97aff369 | 411 | dVAR; dSP; |
| f410a211 | 412 | PERL_ASYNC_CHECK(); |
| a0d0e21e LW |
413 | if (SvTRUE(TOPs)) |
| 414 | RETURN; | |
| 415 | else { | |
| c960fc3b SP |
416 | if (PL_op->op_type == OP_OR) |
| 417 | --SP; | |
| a0d0e21e LW |
418 | RETURNOP(cLOGOP->op_other); |
| 419 | } | |
| 420 | } | |
| 421 | ||
| 25a55bd7 | 422 | PP(pp_defined) |
| c963b151 | 423 | { |
| 97aff369 | 424 | dVAR; dSP; |
| eb578fdb | 425 | SV* sv; |
| 6136c704 | 426 | bool defined; |
| 25a55bd7 | 427 | const int op_type = PL_op->op_type; |
| ea5195b7 | 428 | const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN); |
| c963b151 | 429 | |
| 6136c704 | 430 | if (is_dor) { |
| f410a211 | 431 | PERL_ASYNC_CHECK(); |
| 25a55bd7 SP |
432 | sv = TOPs; |
| 433 | if (!sv || !SvANY(sv)) { | |
| 2bd49cfc NC |
434 | if (op_type == OP_DOR) |
| 435 | --SP; | |
| 25a55bd7 SP |
436 | RETURNOP(cLOGOP->op_other); |
| 437 | } | |
| b7c44293 RGS |
438 | } |
| 439 | else { | |
| 440 | /* OP_DEFINED */ | |
| 25a55bd7 SP |
441 | sv = POPs; |
| 442 | if (!sv || !SvANY(sv)) | |
| 443 | RETPUSHNO; | |
| b7c44293 | 444 | } |
| 25a55bd7 | 445 | |
| 6136c704 | 446 | defined = FALSE; |
| c963b151 BD |
447 | switch (SvTYPE(sv)) { |
| 448 | case SVt_PVAV: | |
| 449 | if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
| 25a55bd7 | 450 | defined = TRUE; |
| c963b151 BD |
451 | break; |
| 452 | case SVt_PVHV: | |
| 453 | if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
| 25a55bd7 | 454 | defined = TRUE; |
| c963b151 BD |
455 | break; |
| 456 | case SVt_PVCV: | |
| 457 | if (CvROOT(sv) || CvXSUB(sv)) | |
| 25a55bd7 | 458 | defined = TRUE; |
| c963b151 BD |
459 | break; |
| 460 | default: | |
| 5b295bef | 461 | SvGETMAGIC(sv); |
| c963b151 | 462 | if (SvOK(sv)) |
| 25a55bd7 | 463 | defined = TRUE; |
| 6136c704 | 464 | break; |
| c963b151 | 465 | } |
| 6136c704 AL |
466 | |
| 467 | if (is_dor) { | |
| c960fc3b SP |
468 | if(defined) |
| 469 | RETURN; | |
| 470 | if(op_type == OP_DOR) | |
| 471 | --SP; | |
| 25a55bd7 | 472 | RETURNOP(cLOGOP->op_other); |
| 25a55bd7 | 473 | } |
| d9aa96a4 SP |
474 | /* assuming OP_DEFINED */ |
| 475 | if(defined) | |
| 476 | RETPUSHYES; | |
| 477 | RETPUSHNO; | |
| c963b151 BD |
478 | } |
| 479 | ||
| a0d0e21e LW |
480 | PP(pp_add) |
| 481 | { | |
| 800401ee | 482 | dVAR; dSP; dATARGET; bool useleft; SV *svl, *svr; |
| 6f1401dc DM |
483 | tryAMAGICbin_MG(add_amg, AMGf_assign|AMGf_numeric); |
| 484 | svr = TOPs; | |
| 485 | svl = TOPm1s; | |
| 486 | ||
| 800401ee | 487 | useleft = USE_LEFT(svl); |
| 28e5dec8 JH |
488 | #ifdef PERL_PRESERVE_IVUV |
| 489 | /* We must see if we can perform the addition with integers if possible, | |
| 490 | as the integer code detects overflow while the NV code doesn't. | |
| 491 | If either argument hasn't had a numeric conversion yet attempt to get | |
| 492 | the IV. It's important to do this now, rather than just assuming that | |
| 493 | it's not IOK as a PV of "9223372036854775806" may not take well to NV | |
| 494 | addition, and an SV which is NOK, NV=6.0 ought to be coerced to | |
| 495 | integer in case the second argument is IV=9223372036854775806 | |
| 496 | We can (now) rely on sv_2iv to do the right thing, only setting the | |
| 497 | public IOK flag if the value in the NV (or PV) slot is truly integer. | |
| 498 | ||
| 499 | A side effect is that this also aggressively prefers integer maths over | |
| 7dca457a NC |
500 | fp maths for integer values. |
| 501 | ||
| a00b5bd3 | 502 | How to detect overflow? |
| 7dca457a NC |
503 | |
| 504 | C 99 section 6.2.6.1 says | |
| 505 | ||
| 506 | The range of nonnegative values of a signed integer type is a subrange | |
| 507 | of the corresponding unsigned integer type, and the representation of | |
| 508 | the same value in each type is the same. A computation involving | |
| 509 | unsigned operands can never overflow, because a result that cannot be | |
| 510 | represented by the resulting unsigned integer type is reduced modulo | |
| 511 | the number that is one greater than the largest value that can be | |
| 512 | represented by the resulting type. | |
| 513 | ||
| 514 | (the 9th paragraph) | |
| 515 | ||
| 516 | which I read as "unsigned ints wrap." | |
| 517 | ||
| 518 | signed integer overflow seems to be classed as "exception condition" | |
| 519 | ||
| 520 | If an exceptional condition occurs during the evaluation of an | |
| 521 | expression (that is, if the result is not mathematically defined or not | |
| 522 | in the range of representable values for its type), the behavior is | |
| 523 | undefined. | |
| 524 | ||
| 525 | (6.5, the 5th paragraph) | |
| 526 | ||
| 527 | I had assumed that on 2s complement machines signed arithmetic would | |
| 528 | wrap, hence coded pp_add and pp_subtract on the assumption that | |
| 529 | everything perl builds on would be happy. After much wailing and | |
| 530 | gnashing of teeth it would seem that irix64 knows its ANSI spec well, | |
| 531 | knows that it doesn't need to, and doesn't. Bah. Anyway, the all- | |
| 532 | unsigned code below is actually shorter than the old code. :-) | |
| 533 | */ | |
| 534 | ||
| 01f91bf2 | 535 | if (SvIV_please_nomg(svr)) { |
| 28e5dec8 JH |
536 | /* Unless the left argument is integer in range we are going to have to |
| 537 | use NV maths. Hence only attempt to coerce the right argument if | |
| 538 | we know the left is integer. */ | |
| eb578fdb | 539 | UV auv = 0; |
| 9c5ffd7c | 540 | bool auvok = FALSE; |
| 7dca457a NC |
541 | bool a_valid = 0; |
| 542 | ||
| 28e5dec8 | 543 | if (!useleft) { |
| 7dca457a NC |
544 | auv = 0; |
| 545 | a_valid = auvok = 1; | |
| 546 | /* left operand is undef, treat as zero. + 0 is identity, | |
| 547 | Could SETi or SETu right now, but space optimise by not adding | |
| 548 | lots of code to speed up what is probably a rarish case. */ | |
| 549 | } else { | |
| 550 | /* Left operand is defined, so is it IV? */ | |
| 01f91bf2 | 551 | if (SvIV_please_nomg(svl)) { |
| 800401ee JH |
552 | if ((auvok = SvUOK(svl))) |
| 553 | auv = SvUVX(svl); | |
| 7dca457a | 554 | else { |
| eb578fdb | 555 | const IV aiv = SvIVX(svl); |
| 7dca457a NC |
556 | if (aiv >= 0) { |
| 557 | auv = aiv; | |
| 558 | auvok = 1; /* Now acting as a sign flag. */ | |
| 559 | } else { /* 2s complement assumption for IV_MIN */ | |
| 560 | auv = (UV)-aiv; | |
| 561 | } | |
| 562 | } | |
| 563 | a_valid = 1; | |
| 28e5dec8 JH |
564 | } |
| 565 | } | |
| 7dca457a NC |
566 | if (a_valid) { |
| 567 | bool result_good = 0; | |
| 568 | UV result; | |
| eb578fdb | 569 | UV buv; |
| 800401ee | 570 | bool buvok = SvUOK(svr); |
| a00b5bd3 | 571 | |
| 7dca457a | 572 | if (buvok) |
| 800401ee | 573 | buv = SvUVX(svr); |
| 7dca457a | 574 | else { |
| eb578fdb | 575 | const IV biv = SvIVX(svr); |
| 7dca457a NC |
576 | if (biv >= 0) { |
| 577 | buv = biv; | |
| 578 | buvok = 1; | |
| 579 | } else | |
| 580 | buv = (UV)-biv; | |
| 581 | } | |
| 582 | /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve, | |
| 602f51c4 | 583 | else "IV" now, independent of how it came in. |
| 7dca457a NC |
584 | if a, b represents positive, A, B negative, a maps to -A etc |
| 585 | a + b => (a + b) | |
| 586 | A + b => -(a - b) | |
| 587 | a + B => (a - b) | |
| 588 | A + B => -(a + b) | |
| 589 | all UV maths. negate result if A negative. | |
| 590 | add if signs same, subtract if signs differ. */ | |
| 591 | ||
| 592 | if (auvok ^ buvok) { | |
| 593 | /* Signs differ. */ | |
| 594 | if (auv >= buv) { | |
| 595 | result = auv - buv; | |
| 596 | /* Must get smaller */ | |
| 597 | if (result <= auv) | |
| 598 | result_good = 1; | |
| 599 | } else { | |
| 600 | result = buv - auv; | |
| 601 | if (result <= buv) { | |
| 602 | /* result really should be -(auv-buv). as its negation | |
| 603 | of true value, need to swap our result flag */ | |
| 604 | auvok = !auvok; | |
| 605 | result_good = 1; | |
| 28e5dec8 JH |
606 | } |
| 607 | } | |
| 7dca457a NC |
608 | } else { |
| 609 | /* Signs same */ | |
| 610 | result = auv + buv; | |
| 611 | if (result >= auv) | |
| 612 | result_good = 1; | |
| 613 | } | |
| 614 | if (result_good) { | |
| 615 | SP--; | |
| 616 | if (auvok) | |
| 28e5dec8 | 617 | SETu( result ); |
| 7dca457a NC |
618 | else { |
| 619 | /* Negate result */ | |
| 620 | if (result <= (UV)IV_MIN) | |
| 621 | SETi( -(IV)result ); | |
| 622 | else { | |
| 623 | /* result valid, but out of range for IV. */ | |
| 624 | SETn( -(NV)result ); | |
| 28e5dec8 JH |
625 | } |
| 626 | } | |
| 7dca457a NC |
627 | RETURN; |
| 628 | } /* Overflow, drop through to NVs. */ | |
| 28e5dec8 JH |
629 | } |
| 630 | } | |
| 631 | #endif | |
| a0d0e21e | 632 | { |
| 6f1401dc | 633 | NV value = SvNV_nomg(svr); |
| 4efa5a16 | 634 | (void)POPs; |
| 28e5dec8 JH |
635 | if (!useleft) { |
| 636 | /* left operand is undef, treat as zero. + 0.0 is identity. */ | |
| 637 | SETn(value); | |
| 638 | RETURN; | |
| 639 | } | |
| 6f1401dc | 640 | SETn( value + SvNV_nomg(svl) ); |
| 28e5dec8 | 641 | RETURN; |
| a0d0e21e LW |
642 | } |
| 643 | } | |
| 644 | ||
| 645 | PP(pp_aelemfast) | |
| 646 | { | |
| 97aff369 | 647 | dVAR; dSP; |
| 93bad3fd | 648 | AV * const av = PL_op->op_type == OP_AELEMFAST_LEX |
| 8f878375 | 649 | ? MUTABLE_AV(PAD_SV(PL_op->op_targ)) : GvAVn(cGVOP_gv); |
| a3b680e6 | 650 | const U32 lval = PL_op->op_flags & OPf_MOD; |
| 0bd48802 | 651 | SV** const svp = av_fetch(av, PL_op->op_private, lval); |
| 3280af22 | 652 | SV *sv = (svp ? *svp : &PL_sv_undef); |
| 6ff81951 | 653 | EXTEND(SP, 1); |
| 39cf747a | 654 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
| fd69380d | 655 | mg_get(sv); |
| be6c24e0 | 656 | PUSHs(sv); |
| a0d0e21e LW |
657 | RETURN; |
| 658 | } | |
| 659 | ||
| 660 | PP(pp_join) | |
| 661 | { | |
| 97aff369 | 662 | dVAR; dSP; dMARK; dTARGET; |
| a0d0e21e LW |
663 | MARK++; |
| 664 | do_join(TARG, *MARK, MARK, SP); | |
| 665 | SP = MARK; | |
| 666 | SETs(TARG); | |
| 667 | RETURN; | |
| 668 | } | |
| 669 | ||
| 670 | PP(pp_pushre) | |
| 671 | { | |
| 97aff369 | 672 | dVAR; dSP; |
| 44a8e56a | 673 | #ifdef DEBUGGING |
| 674 | /* | |
| 675 | * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs | |
| 676 | * will be enough to hold an OP*. | |
| 677 | */ | |
| c4420975 | 678 | SV* const sv = sv_newmortal(); |
| 44a8e56a | 679 | sv_upgrade(sv, SVt_PVLV); |
| 680 | LvTYPE(sv) = '/'; | |
| 533c011a | 681 | Copy(&PL_op, &LvTARGOFF(sv), 1, OP*); |
| 44a8e56a | 682 | XPUSHs(sv); |
| 683 | #else | |
| ad64d0ec | 684 | XPUSHs(MUTABLE_SV(PL_op)); |
| 44a8e56a | 685 | #endif |
| a0d0e21e LW |
686 | RETURN; |
| 687 | } | |
| 688 | ||
| 689 | /* Oversized hot code. */ | |
| 690 | ||
| 691 | PP(pp_print) | |
| 692 | { | |
| 27da23d5 | 693 | dVAR; dSP; dMARK; dORIGMARK; |
| eb578fdb | 694 | PerlIO *fp; |
| 236988e4 | 695 | MAGIC *mg; |
| 159b6efe NC |
696 | GV * const gv |
| 697 | = (PL_op->op_flags & OPf_STACKED) ? MUTABLE_GV(*++MARK) : PL_defoutgv; | |
| 9c9f25b8 | 698 | IO *io = GvIO(gv); |
| 5b468f54 | 699 | |
| 9c9f25b8 | 700 | if (io |
| ad64d0ec | 701 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
| 5b468f54 | 702 | { |
| 01bb7c6d | 703 | had_magic: |
| 68dc0745 | 704 | if (MARK == ORIGMARK) { |
| 1c846c1f | 705 | /* If using default handle then we need to make space to |
| a60c0954 NIS |
706 | * pass object as 1st arg, so move other args up ... |
| 707 | */ | |
| 4352c267 | 708 | MEXTEND(SP, 1); |
| 68dc0745 | 709 | ++MARK; |
| 710 | Move(MARK, MARK + 1, (SP - MARK) + 1, SV*); | |
| 711 | ++SP; | |
| 712 | } | |
| 94bc412f NC |
713 | return Perl_tied_method(aTHX_ "PRINT", mark - 1, MUTABLE_SV(io), |
| 714 | mg, | |
| 715 | (G_SCALAR | TIED_METHOD_ARGUMENTS_ON_STACK | |
| 716 | | (PL_op->op_type == OP_SAY | |
| 717 | ? TIED_METHOD_SAY : 0)), sp - mark); | |
| 236988e4 | 718 | } |
| 9c9f25b8 | 719 | if (!io) { |
| 68b590d9 | 720 | if ( gv && GvEGVx(gv) && (io = GvIO(GvEGV(gv))) |
| ad64d0ec | 721 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
| 01bb7c6d | 722 | goto had_magic; |
| 51087808 | 723 | report_evil_fh(gv); |
| 93189314 | 724 | SETERRNO(EBADF,RMS_IFI); |
| a0d0e21e LW |
725 | goto just_say_no; |
| 726 | } | |
| 727 | else if (!(fp = IoOFP(io))) { | |
| 7716c5c5 NC |
728 | if (IoIFP(io)) |
| 729 | report_wrongway_fh(gv, '<'); | |
| 51087808 | 730 | else |
| 7716c5c5 | 731 | report_evil_fh(gv); |
| 93189314 | 732 | SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI); |
| a0d0e21e LW |
733 | goto just_say_no; |
| 734 | } | |
| 735 | else { | |
| e23d9e2f | 736 | SV * const ofs = GvSV(PL_ofsgv); /* $, */ |
| a0d0e21e | 737 | MARK++; |
| e23d9e2f | 738 | if (ofs && (SvGMAGICAL(ofs) || SvOK(ofs))) { |
| a0d0e21e LW |
739 | while (MARK <= SP) { |
| 740 | if (!do_print(*MARK, fp)) | |
| 741 | break; | |
| 742 | MARK++; | |
| 743 | if (MARK <= SP) { | |
| e23d9e2f CS |
744 | /* don't use 'ofs' here - it may be invalidated by magic callbacks */ |
| 745 | if (!do_print(GvSV(PL_ofsgv), fp)) { | |
| a0d0e21e LW |
746 | MARK--; |
| 747 | break; | |
| 748 | } | |
| 749 | } | |
| 750 | } | |
| 751 | } | |
| 752 | else { | |
| 753 | while (MARK <= SP) { | |
| 754 | if (!do_print(*MARK, fp)) | |
| 755 | break; | |
| 756 | MARK++; | |
| 757 | } | |
| 758 | } | |
| 759 | if (MARK <= SP) | |
| 760 | goto just_say_no; | |
| 761 | else { | |
| cfc4a7da GA |
762 | if (PL_op->op_type == OP_SAY) { |
| 763 | if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp)) | |
| 764 | goto just_say_no; | |
| 765 | } | |
| 766 | else if (PL_ors_sv && SvOK(PL_ors_sv)) | |
| 7889fe52 | 767 | if (!do_print(PL_ors_sv, fp)) /* $\ */ |
| a0d0e21e LW |
768 | goto just_say_no; |
| 769 | ||
| 770 | if (IoFLAGS(io) & IOf_FLUSH) | |
| 760ac839 | 771 | if (PerlIO_flush(fp) == EOF) |
| a0d0e21e LW |
772 | goto just_say_no; |
| 773 | } | |
| 774 | } | |
| 775 | SP = ORIGMARK; | |
| e52fd6f4 | 776 | XPUSHs(&PL_sv_yes); |
| a0d0e21e LW |
777 | RETURN; |
| 778 | ||
| 779 | just_say_no: | |
| 780 | SP = ORIGMARK; | |
| e52fd6f4 | 781 | XPUSHs(&PL_sv_undef); |
| a0d0e21e LW |
782 | RETURN; |
| 783 | } | |
| 784 | ||
| 785 | PP(pp_rv2av) | |
| 786 | { | |
| 97aff369 | 787 | dVAR; dSP; dTOPss; |
| cde874ca | 788 | const I32 gimme = GIMME_V; |
| 17ab7946 NC |
789 | static const char an_array[] = "an ARRAY"; |
| 790 | static const char a_hash[] = "a HASH"; | |
| 791 | const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV; | |
| d83b45b8 | 792 | const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV; |
| a0d0e21e | 793 | |
| 9026059d | 794 | SvGETMAGIC(sv); |
| a0d0e21e | 795 | if (SvROK(sv)) { |
| 93d7320b DM |
796 | if (SvAMAGIC(sv)) { |
| 797 | sv = amagic_deref_call(sv, is_pp_rv2av ? to_av_amg : to_hv_amg); | |
| 93d7320b | 798 | } |
| 17ab7946 NC |
799 | sv = SvRV(sv); |
| 800 | if (SvTYPE(sv) != type) | |
| dcbac5bb | 801 | /* diag_listed_as: Not an ARRAY reference */ |
| 17ab7946 | 802 | DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash); |
| 3da99855 FC |
803 | else if (PL_op->op_flags & OPf_MOD |
| 804 | && PL_op->op_private & OPpLVAL_INTRO) | |
| 805 | Perl_croak(aTHX_ "%s", PL_no_localize_ref); | |
| a0d0e21e | 806 | } |
| 9f527363 | 807 | else if (SvTYPE(sv) != type) { |
| 67955e0c | 808 | GV *gv; |
| 1c846c1f | 809 | |
| 6e592b3a | 810 | if (!isGV_with_GP(sv)) { |
| dc3c76f8 NC |
811 | gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash, |
| 812 | type, &sp); | |
| 813 | if (!gv) | |
| 814 | RETURN; | |
| 35cd451c GS |
815 | } |
| 816 | else { | |
| 159b6efe | 817 | gv = MUTABLE_GV(sv); |
| a0d0e21e | 818 | } |
| ad64d0ec | 819 | sv = is_pp_rv2av ? MUTABLE_SV(GvAVn(gv)) : MUTABLE_SV(GvHVn(gv)); |
| 533c011a | 820 | if (PL_op->op_private & OPpLVAL_INTRO) |
| ad64d0ec | 821 | sv = is_pp_rv2av ? MUTABLE_SV(save_ary(gv)) : MUTABLE_SV(save_hash(gv)); |
| 9f527363 FC |
822 | } |
| 823 | if (PL_op->op_flags & OPf_REF) { | |
| 17ab7946 | 824 | SETs(sv); |
| a0d0e21e | 825 | RETURN; |
| 9f527363 FC |
826 | } |
| 827 | else if (PL_op->op_private & OPpMAYBE_LVSUB) { | |
| 40c94d11 FC |
828 | const I32 flags = is_lvalue_sub(); |
| 829 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
| cde874ca | 830 | if (gimme != G_ARRAY) |
| 042560a6 | 831 | goto croak_cant_return; |
| 17ab7946 | 832 | SETs(sv); |
| 78f9721b | 833 | RETURN; |
| 40c94d11 | 834 | } |
| a0d0e21e LW |
835 | } |
| 836 | ||
| 17ab7946 | 837 | if (is_pp_rv2av) { |
| 502c6561 | 838 | AV *const av = MUTABLE_AV(sv); |
| 486ec47a | 839 | /* The guts of pp_rv2av, with no intending change to preserve history |
| 17ab7946 NC |
840 | (until such time as we get tools that can do blame annotation across |
| 841 | whitespace changes. */ | |
| 96913b52 VP |
842 | if (gimme == G_ARRAY) { |
| 843 | const I32 maxarg = AvFILL(av) + 1; | |
| 844 | (void)POPs; /* XXXX May be optimized away? */ | |
| 845 | EXTEND(SP, maxarg); | |
| 846 | if (SvRMAGICAL(av)) { | |
| 847 | U32 i; | |
| 848 | for (i=0; i < (U32)maxarg; i++) { | |
| 849 | SV ** const svp = av_fetch(av, i, FALSE); | |
| 850 | /* See note in pp_helem, and bug id #27839 */ | |
| 851 | SP[i+1] = svp | |
| 852 | ? SvGMAGICAL(*svp) ? (mg_get(*svp), *svp) : *svp | |
| 853 | : &PL_sv_undef; | |
| 854 | } | |
| 855 | } | |
| 856 | else { | |
| 857 | Copy(AvARRAY(av), SP+1, maxarg, SV*); | |
| 93965878 | 858 | } |
| 96913b52 | 859 | SP += maxarg; |
| 1c846c1f | 860 | } |
| 96913b52 VP |
861 | else if (gimme == G_SCALAR) { |
| 862 | dTARGET; | |
| 863 | const I32 maxarg = AvFILL(av) + 1; | |
| 864 | SETi(maxarg); | |
| 93965878 | 865 | } |
| 17ab7946 NC |
866 | } else { |
| 867 | /* The guts of pp_rv2hv */ | |
| 96913b52 VP |
868 | if (gimme == G_ARRAY) { /* array wanted */ |
| 869 | *PL_stack_sp = sv; | |
| 981b7185 | 870 | return Perl_do_kv(aTHX); |
| 96913b52 | 871 | } |
| c8fe3bdf | 872 | else if ((PL_op->op_private & OPpTRUEBOOL |
| adc42c31 | 873 | || ( PL_op->op_private & OPpMAYBE_TRUEBOOL |
| c8fe3bdf FC |
874 | && block_gimme() == G_VOID )) |
| 875 | && (!SvRMAGICAL(sv) || !mg_find(sv, PERL_MAGIC_tied))) | |
| 876 | SETs(HvUSEDKEYS(sv) ? &PL_sv_yes : sv_2mortal(newSViv(0))); | |
| 96913b52 VP |
877 | else if (gimme == G_SCALAR) { |
| 878 | dTARGET; | |
| 879 | TARG = Perl_hv_scalar(aTHX_ MUTABLE_HV(sv)); | |
| 880 | SPAGAIN; | |
| 881 | SETTARG; | |
| 882 | } | |
| 17ab7946 | 883 | } |
| be85d344 | 884 | RETURN; |
| 042560a6 NC |
885 | |
| 886 | croak_cant_return: | |
| 887 | Perl_croak(aTHX_ "Can't return %s to lvalue scalar context", | |
| 888 | is_pp_rv2av ? "array" : "hash"); | |
| 77e217c6 | 889 | RETURN; |
| a0d0e21e LW |
890 | } |
| 891 | ||
| 10c8fecd GS |
892 | STATIC void |
| 893 | S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem) | |
| 894 | { | |
| 97aff369 | 895 | dVAR; |
| 7918f24d NC |
896 | |
| 897 | PERL_ARGS_ASSERT_DO_ODDBALL; | |
| 898 | ||
| 10c8fecd GS |
899 | if (*relem) { |
| 900 | SV *tmpstr; | |
| b464bac0 | 901 | const HE *didstore; |
| 6d822dc4 MS |
902 | |
| 903 | if (ckWARN(WARN_MISC)) { | |
| a3b680e6 | 904 | const char *err; |
| 10c8fecd GS |
905 | if (relem == firstrelem && |
| 906 | SvROK(*relem) && | |
| 907 | (SvTYPE(SvRV(*relem)) == SVt_PVAV || | |
| 908 | SvTYPE(SvRV(*relem)) == SVt_PVHV)) | |
| 909 | { | |
| a3b680e6 | 910 | err = "Reference found where even-sized list expected"; |
| 10c8fecd GS |
911 | } |
| 912 | else | |
| a3b680e6 | 913 | err = "Odd number of elements in hash assignment"; |
| f1f66076 | 914 | Perl_warner(aTHX_ packWARN(WARN_MISC), "%s", err); |
| 10c8fecd | 915 | } |
| 6d822dc4 | 916 | |
| 561b68a9 | 917 | tmpstr = newSV(0); |
| 6d822dc4 MS |
918 | didstore = hv_store_ent(hash,*relem,tmpstr,0); |
| 919 | if (SvMAGICAL(hash)) { | |
| 920 | if (SvSMAGICAL(tmpstr)) | |
| 921 | mg_set(tmpstr); | |
| 922 | if (!didstore) | |
| 923 | sv_2mortal(tmpstr); | |
| 924 | } | |
| 925 | TAINT_NOT; | |
| 10c8fecd GS |
926 | } |
| 927 | } | |
| 928 | ||
| a0d0e21e LW |
929 | PP(pp_aassign) |
| 930 | { | |
| 27da23d5 | 931 | dVAR; dSP; |
| 3280af22 NIS |
932 | SV **lastlelem = PL_stack_sp; |
| 933 | SV **lastrelem = PL_stack_base + POPMARK; | |
| 934 | SV **firstrelem = PL_stack_base + POPMARK + 1; | |
| a0d0e21e LW |
935 | SV **firstlelem = lastrelem + 1; |
| 936 | ||
| eb578fdb KW |
937 | SV **relem; |
| 938 | SV **lelem; | |
| a0d0e21e | 939 | |
| eb578fdb KW |
940 | SV *sv; |
| 941 | AV *ary; | |
| a0d0e21e | 942 | |
| 54310121 | 943 | I32 gimme; |
| a0d0e21e LW |
944 | HV *hash; |
| 945 | I32 i; | |
| 946 | int magic; | |
| ca65944e | 947 | int duplicates = 0; |
| cbbf8932 | 948 | SV **firsthashrelem = NULL; /* "= 0" keeps gcc 2.95 quiet */ |
| 5637b936 | 949 | |
| 3280af22 | 950 | PL_delaymagic = DM_DELAY; /* catch simultaneous items */ |
| ca65944e | 951 | gimme = GIMME_V; |
| a0d0e21e LW |
952 | |
| 953 | /* If there's a common identifier on both sides we have to take | |
| 954 | * special care that assigning the identifier on the left doesn't | |
| 955 | * clobber a value on the right that's used later in the list. | |
| acdea6f0 | 956 | * Don't bother if LHS is just an empty hash or array. |
| a0d0e21e | 957 | */ |
| acdea6f0 DM |
958 | |
| 959 | if ( (PL_op->op_private & OPpASSIGN_COMMON) | |
| 960 | && ( | |
| 961 | firstlelem != lastlelem | |
| 962 | || ! ((sv = *firstlelem)) | |
| 963 | || SvMAGICAL(sv) | |
| 964 | || ! (SvTYPE(sv) == SVt_PVAV || SvTYPE(sv) == SVt_PVHV) | |
| 965 | || (SvTYPE(sv) == SVt_PVAV && AvFILL((AV*)sv) != -1) | |
| 1b95d04f | 966 | || (SvTYPE(sv) == SVt_PVHV && HvUSEDKEYS((HV*)sv) != 0) |
| acdea6f0 DM |
967 | ) |
| 968 | ) { | |
| cc5e57d2 | 969 | EXTEND_MORTAL(lastrelem - firstrelem + 1); |
| 10c8fecd | 970 | for (relem = firstrelem; relem <= lastrelem; relem++) { |
| 155aba94 | 971 | if ((sv = *relem)) { |
| a1f49e72 | 972 | TAINT_NOT; /* Each item is independent */ |
| 61e5f455 NC |
973 | |
| 974 | /* Dear TODO test in t/op/sort.t, I love you. | |
| 975 | (It's relying on a panic, not a "semi-panic" from newSVsv() | |
| 976 | and then an assertion failure below.) */ | |
| 977 | if (SvIS_FREED(sv)) { | |
| 978 | Perl_croak(aTHX_ "panic: attempt to copy freed scalar %p", | |
| 979 | (void*)sv); | |
| 980 | } | |
| 2203fb5a FC |
981 | /* Not newSVsv(), as it does not allow copy-on-write, |
| 982 | resulting in wasteful copies. We need a second copy of | |
| 983 | a temp here, hence the SV_NOSTEAL. */ | |
| 984 | *relem = sv_mortalcopy_flags(sv,SV_GMAGIC|SV_DO_COW_SVSETSV | |
| 985 | |SV_NOSTEAL); | |
| a1f49e72 | 986 | } |
| 10c8fecd | 987 | } |
| a0d0e21e LW |
988 | } |
| 989 | ||
| 990 | relem = firstrelem; | |
| 991 | lelem = firstlelem; | |
| 4608196e RGS |
992 | ary = NULL; |
| 993 | hash = NULL; | |
| 10c8fecd | 994 | |
| a0d0e21e | 995 | while (lelem <= lastlelem) { |
| bbce6d69 | 996 | TAINT_NOT; /* Each item stands on its own, taintwise. */ |
| a0d0e21e LW |
997 | sv = *lelem++; |
| 998 | switch (SvTYPE(sv)) { | |
| 999 | case SVt_PVAV: | |
| 60edcf09 | 1000 | ary = MUTABLE_AV(sv); |
| 748a9306 | 1001 | magic = SvMAGICAL(ary) != 0; |
| 60edcf09 FC |
1002 | ENTER; |
| 1003 | SAVEFREESV(SvREFCNT_inc_simple_NN(sv)); | |
| a0d0e21e | 1004 | av_clear(ary); |
| 7e42bd57 | 1005 | av_extend(ary, lastrelem - relem); |
| a0d0e21e LW |
1006 | i = 0; |
| 1007 | while (relem <= lastrelem) { /* gobble up all the rest */ | |
| 5117ca91 | 1008 | SV **didstore; |
| a0d0e21e | 1009 | assert(*relem); |
| 18024492 FC |
1010 | SvGETMAGIC(*relem); /* before newSV, in case it dies */ |
| 1011 | sv = newSV(0); | |
| 1012 | sv_setsv_nomg(sv, *relem); | |
| a0d0e21e | 1013 | *(relem++) = sv; |
| 5117ca91 GS |
1014 | didstore = av_store(ary,i++,sv); |
| 1015 | if (magic) { | |
| 18024492 FC |
1016 | if (!didstore) |
| 1017 | sv_2mortal(sv); | |
| 8ef24240 | 1018 | if (SvSMAGICAL(sv)) |
| fb73857a | 1019 | mg_set(sv); |
| 5117ca91 | 1020 | } |
| bbce6d69 | 1021 | TAINT_NOT; |
| a0d0e21e | 1022 | } |
| 354b0578 | 1023 | if (PL_delaymagic & DM_ARRAY_ISA) |
| ad64d0ec | 1024 | SvSETMAGIC(MUTABLE_SV(ary)); |
| 60edcf09 | 1025 | LEAVE; |
| a0d0e21e | 1026 | break; |
| 10c8fecd | 1027 | case SVt_PVHV: { /* normal hash */ |
| a0d0e21e | 1028 | SV *tmpstr; |
| 45960564 | 1029 | SV** topelem = relem; |
| a0d0e21e | 1030 | |
| 60edcf09 | 1031 | hash = MUTABLE_HV(sv); |
| 748a9306 | 1032 | magic = SvMAGICAL(hash) != 0; |
| 60edcf09 FC |
1033 | ENTER; |
| 1034 | SAVEFREESV(SvREFCNT_inc_simple_NN(sv)); | |
| a0d0e21e | 1035 | hv_clear(hash); |
| ca65944e | 1036 | firsthashrelem = relem; |
| a0d0e21e LW |
1037 | |
| 1038 | while (relem < lastrelem) { /* gobble up all the rest */ | |
| 5117ca91 | 1039 | HE *didstore; |
| 6136c704 AL |
1040 | sv = *relem ? *relem : &PL_sv_no; |
| 1041 | relem++; | |
| 9c744f4f | 1042 | tmpstr = sv_newmortal(); |
| a0d0e21e LW |
1043 | if (*relem) |
| 1044 | sv_setsv(tmpstr,*relem); /* value */ | |
| 45960564 DM |
1045 | relem++; |
| 1046 | if (gimme != G_VOID) { | |
| 1047 | if (hv_exists_ent(hash, sv, 0)) | |
| 1048 | /* key overwrites an existing entry */ | |
| 1049 | duplicates += 2; | |
| 1050 | else | |
| 1051 | if (gimme == G_ARRAY) { | |
| 1052 | /* copy element back: possibly to an earlier | |
| 1053 | * stack location if we encountered dups earlier */ | |
| 1054 | *topelem++ = sv; | |
| 1055 | *topelem++ = tmpstr; | |
| 1056 | } | |
| 1057 | } | |
| 5117ca91 | 1058 | didstore = hv_store_ent(hash,sv,tmpstr,0); |
| 9c744f4f | 1059 | if (didstore) SvREFCNT_inc_simple_void_NN(tmpstr); |
| 5117ca91 | 1060 | if (magic) { |
| 8ef24240 | 1061 | if (SvSMAGICAL(tmpstr)) |
| fb73857a | 1062 | mg_set(tmpstr); |
| 5117ca91 | 1063 | } |
| bbce6d69 | 1064 | TAINT_NOT; |
| 8e07c86e | 1065 | } |
| 6a0deba8 | 1066 | if (relem == lastrelem) { |
| 10c8fecd | 1067 | do_oddball(hash, relem, firstrelem); |
| 6a0deba8 | 1068 | relem++; |
| 1930e939 | 1069 | } |
| 60edcf09 | 1070 | LEAVE; |
| a0d0e21e LW |
1071 | } |
| 1072 | break; | |
| 1073 | default: | |
| 6fc92669 GS |
1074 | if (SvIMMORTAL(sv)) { |
| 1075 | if (relem <= lastrelem) | |
| 1076 | relem++; | |
| 1077 | break; | |
| a0d0e21e LW |
1078 | } |
| 1079 | if (relem <= lastrelem) { | |
| 1c70fb82 FC |
1080 | if ( |
| 1081 | SvTEMP(sv) && !SvSMAGICAL(sv) && SvREFCNT(sv) == 1 && | |
| 1082 | (!isGV_with_GP(sv) || SvFAKE(sv)) && ckWARN(WARN_MISC) | |
| 1083 | ) | |
| 1084 | Perl_warner(aTHX_ | |
| 1085 | packWARN(WARN_MISC), | |
| 1086 | "Useless assignment to a temporary" | |
| 1087 | ); | |
| a0d0e21e LW |
1088 | sv_setsv(sv, *relem); |
| 1089 | *(relem++) = sv; | |
| 1090 | } | |
| 1091 | else | |
| 3280af22 | 1092 | sv_setsv(sv, &PL_sv_undef); |
| 8ef24240 | 1093 | SvSETMAGIC(sv); |
| a0d0e21e LW |
1094 | break; |
| 1095 | } | |
| 1096 | } | |
| 3280af22 | 1097 | if (PL_delaymagic & ~DM_DELAY) { |
| 985213f2 AB |
1098 | /* Will be used to set PL_tainting below */ |
| 1099 | UV tmp_uid = PerlProc_getuid(); | |
| 1100 | UV tmp_euid = PerlProc_geteuid(); | |
| 1101 | UV tmp_gid = PerlProc_getgid(); | |
| 1102 | UV tmp_egid = PerlProc_getegid(); | |
| 1103 | ||
| 3280af22 | 1104 | if (PL_delaymagic & DM_UID) { |
| a0d0e21e | 1105 | #ifdef HAS_SETRESUID |
| 985213f2 AB |
1106 | (void)setresuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, |
| 1107 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1, | |
| fb934a90 | 1108 | (Uid_t)-1); |
| 56febc5e AD |
1109 | #else |
| 1110 | # ifdef HAS_SETREUID | |
| 985213f2 AB |
1111 | (void)setreuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, |
| 1112 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1); | |
| 56febc5e AD |
1113 | # else |
| 1114 | # ifdef HAS_SETRUID | |
| b28d0864 | 1115 | if ((PL_delaymagic & DM_UID) == DM_RUID) { |
| 985213f2 | 1116 | (void)setruid(PL_delaymagic_uid); |
| b28d0864 | 1117 | PL_delaymagic &= ~DM_RUID; |
| a0d0e21e | 1118 | } |
| 56febc5e AD |
1119 | # endif /* HAS_SETRUID */ |
| 1120 | # ifdef HAS_SETEUID | |
| b28d0864 | 1121 | if ((PL_delaymagic & DM_UID) == DM_EUID) { |
| 985213f2 | 1122 | (void)seteuid(PL_delaymagic_euid); |
| b28d0864 | 1123 | PL_delaymagic &= ~DM_EUID; |
| a0d0e21e | 1124 | } |
| 56febc5e | 1125 | # endif /* HAS_SETEUID */ |
| b28d0864 | 1126 | if (PL_delaymagic & DM_UID) { |
| 985213f2 | 1127 | if (PL_delaymagic_uid != PL_delaymagic_euid) |
| cea2e8a9 | 1128 | DIE(aTHX_ "No setreuid available"); |
| 985213f2 | 1129 | (void)PerlProc_setuid(PL_delaymagic_uid); |
| a0d0e21e | 1130 | } |
| 56febc5e AD |
1131 | # endif /* HAS_SETREUID */ |
| 1132 | #endif /* HAS_SETRESUID */ | |
| 985213f2 AB |
1133 | tmp_uid = PerlProc_getuid(); |
| 1134 | tmp_euid = PerlProc_geteuid(); | |
| a0d0e21e | 1135 | } |
| 3280af22 | 1136 | if (PL_delaymagic & DM_GID) { |
| a0d0e21e | 1137 | #ifdef HAS_SETRESGID |
| 985213f2 AB |
1138 | (void)setresgid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, |
| 1139 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1, | |
| fb934a90 | 1140 | (Gid_t)-1); |
| 56febc5e AD |
1141 | #else |
| 1142 | # ifdef HAS_SETREGID | |
| 985213f2 AB |
1143 | (void)setregid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, |
| 1144 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1); | |
| 56febc5e AD |
1145 | # else |
| 1146 | # ifdef HAS_SETRGID | |
| b28d0864 | 1147 | if ((PL_delaymagic & DM_GID) == DM_RGID) { |
| 985213f2 | 1148 | (void)setrgid(PL_delaymagic_gid); |
| b28d0864 | 1149 | PL_delaymagic &= ~DM_RGID; |
| a0d0e21e | 1150 | } |
| 56febc5e AD |
1151 | # endif /* HAS_SETRGID */ |
| 1152 | # ifdef HAS_SETEGID | |
| b28d0864 | 1153 | if ((PL_delaymagic & DM_GID) == DM_EGID) { |
| 985213f2 | 1154 | (void)setegid(PL_delaymagic_egid); |
| b28d0864 | 1155 | PL_delaymagic &= ~DM_EGID; |
| a0d0e21e | 1156 | } |
| 56febc5e | 1157 | # endif /* HAS_SETEGID */ |
| b28d0864 | 1158 | if (PL_delaymagic & DM_GID) { |
| 985213f2 | 1159 | if (PL_delaymagic_gid != PL_delaymagic_egid) |
| cea2e8a9 | 1160 | DIE(aTHX_ "No setregid available"); |
| 985213f2 | 1161 | (void)PerlProc_setgid(PL_delaymagic_gid); |
| a0d0e21e | 1162 | } |
| 56febc5e AD |
1163 | # endif /* HAS_SETREGID */ |
| 1164 | #endif /* HAS_SETRESGID */ | |
| 985213f2 AB |
1165 | tmp_gid = PerlProc_getgid(); |
| 1166 | tmp_egid = PerlProc_getegid(); | |
| a0d0e21e | 1167 | } |
| 284167a5 | 1168 | TAINTING_set( TAINTING_get | (tmp_uid && (tmp_euid != tmp_uid || tmp_egid != tmp_gid)) ); |
| a0d0e21e | 1169 | } |
| 3280af22 | 1170 | PL_delaymagic = 0; |
| 54310121 | 1171 | |
| 54310121 | 1172 | if (gimme == G_VOID) |
| 1173 | SP = firstrelem - 1; | |
| 1174 | else if (gimme == G_SCALAR) { | |
| 1175 | dTARGET; | |
| 1176 | SP = firstrelem; | |
| ca65944e | 1177 | SETi(lastrelem - firstrelem + 1 - duplicates); |
| 54310121 | 1178 | } |
| 1179 | else { | |
| ca65944e | 1180 | if (ary) |
| a0d0e21e | 1181 | SP = lastrelem; |
| ca65944e RGS |
1182 | else if (hash) { |
| 1183 | if (duplicates) { | |
| 45960564 DM |
1184 | /* at this point we have removed the duplicate key/value |
| 1185 | * pairs from the stack, but the remaining values may be | |
| 1186 | * wrong; i.e. with (a 1 a 2 b 3) on the stack we've removed | |
| 1187 | * the (a 2), but the stack now probably contains | |
| 1188 | * (a <freed> b 3), because { hv_save(a,1); hv_save(a,2) } | |
| 1189 | * obliterates the earlier key. So refresh all values. */ | |
| ca65944e | 1190 | lastrelem -= duplicates; |
| 45960564 DM |
1191 | relem = firsthashrelem; |
| 1192 | while (relem < lastrelem) { | |
| 1193 | HE *he; | |
| 1194 | sv = *relem++; | |
| 1195 | he = hv_fetch_ent(hash, sv, 0, 0); | |
| 1196 | *relem++ = (he ? HeVAL(he) : &PL_sv_undef); | |
| 1197 | } | |
| ca65944e RGS |
1198 | } |
| 1199 | SP = lastrelem; | |
| 1200 | } | |
| a0d0e21e LW |
1201 | else |
| 1202 | SP = firstrelem + (lastlelem - firstlelem); | |
| 0c8c7a05 | 1203 | lelem = firstlelem + (relem - firstrelem); |
| 5f05dabc | 1204 | while (relem <= SP) |
| 3280af22 | 1205 | *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef; |
| a0d0e21e | 1206 | } |
| 08aeb9f7 | 1207 | |
| 54310121 | 1208 | RETURN; |
| a0d0e21e LW |
1209 | } |
| 1210 | ||
| 8782bef2 GB |
1211 | PP(pp_qr) |
| 1212 | { | |
| 97aff369 | 1213 | dVAR; dSP; |
| eb578fdb | 1214 | PMOP * const pm = cPMOP; |
| fe578d7f | 1215 | REGEXP * rx = PM_GETRE(pm); |
| 10599a69 | 1216 | SV * const pkg = rx ? CALLREG_PACKAGE(rx) : NULL; |
| c4420975 | 1217 | SV * const rv = sv_newmortal(); |
| d63c20f2 DM |
1218 | CV **cvp; |
| 1219 | CV *cv; | |
| 288b8c02 NC |
1220 | |
| 1221 | SvUPGRADE(rv, SVt_IV); | |
| c2123ae3 NC |
1222 | /* For a subroutine describing itself as "This is a hacky workaround" I'm |
| 1223 | loathe to use it here, but it seems to be the right fix. Or close. | |
| 1224 | The key part appears to be that it's essential for pp_qr to return a new | |
| 1225 | object (SV), which implies that there needs to be an effective way to | |
| 1226 | generate a new SV from the existing SV that is pre-compiled in the | |
| 1227 | optree. */ | |
| 1228 | SvRV_set(rv, MUTABLE_SV(reg_temp_copy(NULL, rx))); | |
| 288b8c02 NC |
1229 | SvROK_on(rv); |
| 1230 | ||
| 8d919b0a | 1231 | cvp = &( ReANY((REGEXP *)SvRV(rv))->qr_anoncv); |
| d63c20f2 DM |
1232 | if ((cv = *cvp) && CvCLONE(*cvp)) { |
| 1233 | *cvp = cv_clone(cv); | |
| 1234 | SvREFCNT_dec(cv); | |
| 1235 | } | |
| 1236 | ||
| 288b8c02 | 1237 | if (pkg) { |
| f815daf2 | 1238 | HV *const stash = gv_stashsv(pkg, GV_ADD); |
| a954f6ee | 1239 | SvREFCNT_dec(pkg); |
| 288b8c02 NC |
1240 | (void)sv_bless(rv, stash); |
| 1241 | } | |
| 1242 | ||
| 284167a5 | 1243 | if (RX_ISTAINTED(rx)) { |
| e08e52cf | 1244 | SvTAINTED_on(rv); |
| 9274aefd DM |
1245 | SvTAINTED_on(SvRV(rv)); |
| 1246 | } | |
| c8c13c22 JB |
1247 | XPUSHs(rv); |
| 1248 | RETURN; | |
| 8782bef2 GB |
1249 | } |
| 1250 | ||
| a0d0e21e LW |
1251 | PP(pp_match) |
| 1252 | { | |
| 97aff369 | 1253 | dVAR; dSP; dTARG; |
| eb578fdb | 1254 | PMOP *pm = cPMOP; |
| d65afb4b | 1255 | PMOP *dynpm = pm; |
| eb578fdb KW |
1256 | const char *t; |
| 1257 | const char *s; | |
| 5c144d81 | 1258 | const char *strend; |
| a0d0e21e | 1259 | I32 global; |
| 1ed74d04 | 1260 | U8 r_flags = REXEC_CHECKED; |
| 5c144d81 | 1261 | const char *truebase; /* Start of string */ |
| eb578fdb | 1262 | REGEXP *rx = PM_GETRE(pm); |
| b3eb6a9b | 1263 | bool rxtainted; |
| a3b680e6 | 1264 | const I32 gimme = GIMME; |
| a0d0e21e | 1265 | STRLEN len; |
| 748a9306 | 1266 | I32 minmatch = 0; |
| a3b680e6 | 1267 | const I32 oldsave = PL_savestack_ix; |
| f86702cc | 1268 | I32 update_minmatch = 1; |
| e60df1fa | 1269 | I32 had_zerolen = 0; |
| 58e23c8d | 1270 | U32 gpos = 0; |
| a0d0e21e | 1271 | |
| 533c011a | 1272 | if (PL_op->op_flags & OPf_STACKED) |
| a0d0e21e | 1273 | TARG = POPs; |
| 59f00321 RGS |
1274 | else if (PL_op->op_private & OPpTARGET_MY) |
| 1275 | GETTARGET; | |
| a0d0e21e | 1276 | else { |
| 54b9620d | 1277 | TARG = DEFSV; |
| a0d0e21e LW |
1278 | EXTEND(SP,1); |
| 1279 | } | |
| d9f424b2 | 1280 | |
| c277df42 | 1281 | PUTBACK; /* EVAL blocks need stack_sp. */ |
| 69dc4b30 FC |
1282 | /* Skip get-magic if this is a qr// clone, because regcomp has |
| 1283 | already done it. */ | |
| 8d919b0a | 1284 | s = ReANY(rx)->mother_re |
| 69dc4b30 FC |
1285 | ? SvPV_nomg_const(TARG, len) |
| 1286 | : SvPV_const(TARG, len); | |
| a0d0e21e | 1287 | if (!s) |
| 2269b42e | 1288 | DIE(aTHX_ "panic: pp_match"); |
| 890ce7af | 1289 | strend = s + len; |
| 284167a5 S |
1290 | rxtainted = (RX_ISTAINTED(rx) || |
| 1291 | (TAINT_get && (pm->op_pmflags & PMf_RETAINT))); | |
| 9212bbba | 1292 | TAINT_NOT; |
| a0d0e21e | 1293 | |
| a30b2f1f | 1294 | RX_MATCH_UTF8_set(rx, DO_UTF8(TARG)); |
| d9f424b2 | 1295 | |
| d65afb4b | 1296 | /* PMdf_USED is set after a ?? matches once */ |
| c737faaf YO |
1297 | if ( |
| 1298 | #ifdef USE_ITHREADS | |
| 1299 | SvREADONLY(PL_regex_pad[pm->op_pmoffset]) | |
| 1300 | #else | |
| 1301 | pm->op_pmflags & PMf_USED | |
| 1302 | #endif | |
| 1303 | ) { | |
| e5dc5375 | 1304 | DEBUG_r(PerlIO_printf(Perl_debug_log, "?? already matched once")); |
| c277df42 | 1305 | failure: |
| e5dc5375 | 1306 | |
| a0d0e21e LW |
1307 | if (gimme == G_ARRAY) |
| 1308 | RETURN; | |
| 1309 | RETPUSHNO; | |
| 1310 | } | |
| 1311 | ||
| c737faaf YO |
1312 | |
| 1313 | ||
| 7e313637 FC |
1314 | /* empty pattern special-cased to use last successful pattern if |
| 1315 | possible, except for qr// */ | |
| 8d919b0a | 1316 | if (!ReANY(rx)->mother_re && !RX_PRELEN(rx) |
| 7e313637 | 1317 | && PL_curpm) { |
| 3280af22 | 1318 | pm = PL_curpm; |
| aaa362c4 | 1319 | rx = PM_GETRE(pm); |
| a0d0e21e | 1320 | } |
| d65afb4b | 1321 | |
| e5dc5375 KW |
1322 | if (RX_MINLEN(rx) > (I32)len) { |
| 1323 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String shorter than min possible regex match\n")); | |
| d65afb4b | 1324 | goto failure; |
| e5dc5375 | 1325 | } |
| c277df42 | 1326 | |
| a0d0e21e | 1327 | truebase = t = s; |
| ad94a511 IZ |
1328 | |
| 1329 | /* XXXX What part of this is needed with true \G-support? */ | |
| d65afb4b | 1330 | if ((global = dynpm->op_pmflags & PMf_GLOBAL)) { |
| 07bc277f | 1331 | RX_OFFS(rx)[0].start = -1; |
| a0d0e21e | 1332 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) { |
| c445ea15 | 1333 | MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global); |
| 565764a8 | 1334 | if (mg && mg->mg_len >= 0) { |
| 07bc277f NC |
1335 | if (!(RX_EXTFLAGS(rx) & RXf_GPOS_SEEN)) |
| 1336 | RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len; | |
| 1337 | else if (RX_EXTFLAGS(rx) & RXf_ANCH_GPOS) { | |
| 0ef3e39e | 1338 | r_flags |= REXEC_IGNOREPOS; |
| 07bc277f NC |
1339 | RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len; |
| 1340 | } else if (RX_EXTFLAGS(rx) & RXf_GPOS_FLOAT) | |
| 58e23c8d YO |
1341 | gpos = mg->mg_len; |
| 1342 | else | |
| 07bc277f NC |
1343 | RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len; |
| 1344 | minmatch = (mg->mg_flags & MGf_MINMATCH) ? RX_GOFS(rx) + 1 : 0; | |
| f86702cc | 1345 | update_minmatch = 0; |
| 748a9306 | 1346 | } |
| a0d0e21e LW |
1347 | } |
| 1348 | } | |
| a41aa44d | 1349 | if ( RX_NPARENS(rx) |
| 6502e081 | 1350 | || PL_sawampersand |
| 6502e081 DM |
1351 | || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
| 1352 | ) { | |
| 1353 | r_flags |= (REXEC_COPY_STR|REXEC_COPY_SKIP_PRE); | |
| 1354 | /* in @a =~ /(.)/g, we iterate multiple times, but copy the buffer | |
| 1355 | * only on the first iteration. Therefore we need to copy $' as well | |
| 1356 | * as $&, to make the rest of the string available for captures in | |
| 1357 | * subsequent iterations */ | |
| 1358 | if (! (global && gimme == G_ARRAY)) | |
| 1359 | r_flags |= REXEC_COPY_SKIP_POST; | |
| 1360 | }; | |
| 22e551b9 | 1361 | |
| d7be1480 | 1362 | play_it_again: |
| 07bc277f NC |
1363 | if (global && RX_OFFS(rx)[0].start != -1) { |
| 1364 | t = s = RX_OFFS(rx)[0].end + truebase - RX_GOFS(rx); | |
| e5dc5375 KW |
1365 | if ((s + RX_MINLEN(rx)) > strend || s < truebase) { |
| 1366 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Regex match can't succeed, so not even tried\n")); | |
| a0d0e21e | 1367 | goto nope; |
| e5dc5375 | 1368 | } |
| f86702cc | 1369 | if (update_minmatch++) |
| e60df1fa | 1370 | minmatch = had_zerolen; |
| a0d0e21e | 1371 | } |
| 07bc277f | 1372 | if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT && |
| 3c8556c3 | 1373 | DO_UTF8(TARG) == (RX_UTF8(rx) != 0)) { |
| 5c144d81 NC |
1374 | /* FIXME - can PL_bostr be made const char *? */ |
| 1375 | PL_bostr = (char *)truebase; | |
| f9f4320a | 1376 | s = CALLREG_INTUIT_START(rx, TARG, (char *)s, (char *)strend, r_flags, NULL); |
| f722798b IZ |
1377 | |
| 1378 | if (!s) | |
| 1379 | goto nope; | |
| 07bc277f | 1380 | if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL) |
| 14977893 | 1381 | && !PL_sawampersand |
| 07bc277f | 1382 | && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) |
| 05b4157f | 1383 | && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */ |
| f722798b | 1384 | goto yup; |
| a0d0e21e | 1385 | } |
| 77da2310 NC |
1386 | if (!CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase, |
| 1387 | minmatch, TARG, NUM2PTR(void*, gpos), r_flags)) | |
| 1388 | goto ret_no; | |
| 1389 | ||
| 1390 | PL_curpm = pm; | |
| 1391 | if (dynpm->op_pmflags & PMf_ONCE) { | |
| c737faaf | 1392 | #ifdef USE_ITHREADS |
| 77da2310 | 1393 | SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]); |
| c737faaf | 1394 | #else |
| 77da2310 | 1395 | dynpm->op_pmflags |= PMf_USED; |
| c737faaf | 1396 | #endif |
| a0d0e21e | 1397 | } |
| a0d0e21e LW |
1398 | |
| 1399 | gotcha: | |
| 72311751 GS |
1400 | if (rxtainted) |
| 1401 | RX_MATCH_TAINTED_on(rx); | |
| 1402 | TAINT_IF(RX_MATCH_TAINTED(rx)); | |
| a0d0e21e | 1403 | if (gimme == G_ARRAY) { |
| 07bc277f | 1404 | const I32 nparens = RX_NPARENS(rx); |
| a3b680e6 | 1405 | I32 i = (global && !nparens) ? 1 : 0; |
| a0d0e21e | 1406 | |
| c277df42 | 1407 | SPAGAIN; /* EVAL blocks could move the stack. */ |
| ffc61ed2 JH |
1408 | EXTEND(SP, nparens + i); |
| 1409 | EXTEND_MORTAL(nparens + i); | |
| 1410 | for (i = !i; i <= nparens; i++) { | |
| a0d0e21e | 1411 | PUSHs(sv_newmortal()); |
| 07bc277f NC |
1412 | if ((RX_OFFS(rx)[i].start != -1) && RX_OFFS(rx)[i].end != -1 ) { |
| 1413 | const I32 len = RX_OFFS(rx)[i].end - RX_OFFS(rx)[i].start; | |
| 1414 | s = RX_OFFS(rx)[i].start + truebase; | |
| 1415 | if (RX_OFFS(rx)[i].end < 0 || RX_OFFS(rx)[i].start < 0 || | |
| 290deeac | 1416 | len < 0 || len > strend - s) |
| 5637ef5b NC |
1417 | DIE(aTHX_ "panic: pp_match start/end pointers, i=%ld, " |
| 1418 | "start=%ld, end=%ld, s=%p, strend=%p, len=%"UVuf, | |
| 1419 | (long) i, (long) RX_OFFS(rx)[i].start, | |
| 1420 | (long)RX_OFFS(rx)[i].end, s, strend, (UV) len); | |
| a0d0e21e | 1421 | sv_setpvn(*SP, s, len); |
| cce850e4 | 1422 | if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len)) |
| a197cbdd | 1423 | SvUTF8_on(*SP); |
| a0d0e21e LW |
1424 | } |
| 1425 | } | |
| 1426 | if (global) { | |
| d65afb4b | 1427 | if (dynpm->op_pmflags & PMf_CONTINUE) { |
| 6136c704 | 1428 | MAGIC* mg = NULL; |
| 0af80b60 HS |
1429 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) |
| 1430 | mg = mg_find(TARG, PERL_MAGIC_regex_global); | |
| 1431 | if (!mg) { | |
| d83f0a82 NC |
1432 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 1433 | if (SvIsCOW(TARG)) | |
| 1434 | sv_force_normal_flags(TARG, 0); | |
| 1435 | #endif | |
| 1436 | mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global, | |
| 1437 | &PL_vtbl_mglob, NULL, 0); | |
| 0af80b60 | 1438 | } |
| 07bc277f NC |
1439 | if (RX_OFFS(rx)[0].start != -1) { |
| 1440 | mg->mg_len = RX_OFFS(rx)[0].end; | |
| 1441 | if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end) | |
| 0af80b60 HS |
1442 | mg->mg_flags |= MGf_MINMATCH; |
| 1443 | else | |
| 1444 | mg->mg_flags &= ~MGf_MINMATCH; | |
| 1445 | } | |
| 1446 | } | |
| 07bc277f NC |
1447 | had_zerolen = (RX_OFFS(rx)[0].start != -1 |
| 1448 | && (RX_OFFS(rx)[0].start + RX_GOFS(rx) | |
| 1449 | == (UV)RX_OFFS(rx)[0].end)); | |
| c277df42 | 1450 | PUTBACK; /* EVAL blocks may use stack */ |
| cf93c79d | 1451 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
| a0d0e21e LW |
1452 | goto play_it_again; |
| 1453 | } | |
| ffc61ed2 | 1454 | else if (!nparens) |
| bde848c5 | 1455 | XPUSHs(&PL_sv_yes); |
| 4633a7c4 | 1456 | LEAVE_SCOPE(oldsave); |
| a0d0e21e LW |
1457 | RETURN; |
| 1458 | } | |
| 1459 | else { | |
| 1460 | if (global) { | |
| cbbf8932 | 1461 | MAGIC* mg; |
| a0d0e21e | 1462 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) |
| 14befaf4 | 1463 | mg = mg_find(TARG, PERL_MAGIC_regex_global); |
| cbbf8932 AL |
1464 | else |
| 1465 | mg = NULL; | |
| a0d0e21e | 1466 | if (!mg) { |
| d83f0a82 NC |
1467 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 1468 | if (SvIsCOW(TARG)) | |
| 1469 | sv_force_normal_flags(TARG, 0); | |
| 1470 | #endif | |
| 1471 | mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global, | |
| 1472 | &PL_vtbl_mglob, NULL, 0); | |
| a0d0e21e | 1473 | } |
| 07bc277f NC |
1474 | if (RX_OFFS(rx)[0].start != -1) { |
| 1475 | mg->mg_len = RX_OFFS(rx)[0].end; | |
| 1476 | if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end) | |
| 748a9306 LW |
1477 | mg->mg_flags |= MGf_MINMATCH; |
| 1478 | else | |
| 1479 | mg->mg_flags &= ~MGf_MINMATCH; | |
| 1480 | } | |
| a0d0e21e | 1481 | } |
| 4633a7c4 | 1482 | LEAVE_SCOPE(oldsave); |
| a0d0e21e LW |
1483 | RETPUSHYES; |
| 1484 | } | |
| 1485 | ||
| f722798b | 1486 | yup: /* Confirmed by INTUIT */ |
| 72311751 GS |
1487 | if (rxtainted) |
| 1488 | RX_MATCH_TAINTED_on(rx); | |
| 1489 | TAINT_IF(RX_MATCH_TAINTED(rx)); | |
| 3280af22 | 1490 | PL_curpm = pm; |
| c737faaf YO |
1491 | if (dynpm->op_pmflags & PMf_ONCE) { |
| 1492 | #ifdef USE_ITHREADS | |
| 1493 | SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]); | |
| 1494 | #else | |
| 1495 | dynpm->op_pmflags |= PMf_USED; | |
| 1496 | #endif | |
| 1497 | } | |
| cf93c79d | 1498 | if (RX_MATCH_COPIED(rx)) |
| 07bc277f | 1499 | Safefree(RX_SUBBEG(rx)); |
| cf93c79d | 1500 | RX_MATCH_COPIED_off(rx); |
| 07bc277f | 1501 | RX_SUBBEG(rx) = NULL; |
| a0d0e21e | 1502 | if (global) { |
| 5c144d81 | 1503 | /* FIXME - should rx->subbeg be const char *? */ |
| 07bc277f | 1504 | RX_SUBBEG(rx) = (char *) truebase; |
| 6502e081 DM |
1505 | RX_SUBOFFSET(rx) = 0; |
| 1506 | RX_SUBCOFFSET(rx) = 0; | |
| 07bc277f | 1507 | RX_OFFS(rx)[0].start = s - truebase; |
| a30b2f1f | 1508 | if (RX_MATCH_UTF8(rx)) { |
| 07bc277f NC |
1509 | char * const t = (char*)utf8_hop((U8*)s, RX_MINLENRET(rx)); |
| 1510 | RX_OFFS(rx)[0].end = t - truebase; | |
| 60aeb6fd NIS |
1511 | } |
| 1512 | else { | |
| 07bc277f | 1513 | RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx); |
| 60aeb6fd | 1514 | } |
| 07bc277f | 1515 | RX_SUBLEN(rx) = strend - truebase; |
| a0d0e21e | 1516 | goto gotcha; |
| 1c846c1f | 1517 | } |
| 07bc277f | 1518 | if (PL_sawampersand || RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) { |
| 14977893 | 1519 | I32 off; |
| f8c7b90f | 1520 | #ifdef PERL_OLD_COPY_ON_WRITE |
| ed252734 NC |
1521 | if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) { |
| 1522 | if (DEBUG_C_TEST) { | |
| 1523 | PerlIO_printf(Perl_debug_log, | |
| 1524 | "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n", | |
| 6c9570dc | 1525 | (int) SvTYPE(TARG), (void*)truebase, (void*)t, |
| ed252734 NC |
1526 | (int)(t-truebase)); |
| 1527 | } | |
| bdd9a1b1 NC |
1528 | RX_SAVED_COPY(rx) = sv_setsv_cow(RX_SAVED_COPY(rx), TARG); |
| 1529 | RX_SUBBEG(rx) | |
| 1530 | = (char *) SvPVX_const(RX_SAVED_COPY(rx)) + (t - truebase); | |
| 1531 | assert (SvPOKp(RX_SAVED_COPY(rx))); | |
| ed252734 NC |
1532 | } else |
| 1533 | #endif | |
| 1534 | { | |
| 14977893 | 1535 | |
| 07bc277f | 1536 | RX_SUBBEG(rx) = savepvn(t, strend - t); |
| f8c7b90f | 1537 | #ifdef PERL_OLD_COPY_ON_WRITE |
| bdd9a1b1 | 1538 | RX_SAVED_COPY(rx) = NULL; |
| ed252734 NC |
1539 | #endif |
| 1540 | } | |
| 07bc277f | 1541 | RX_SUBLEN(rx) = strend - t; |
| 6502e081 DM |
1542 | RX_SUBOFFSET(rx) = 0; |
| 1543 | RX_SUBCOFFSET(rx) = 0; | |
| 14977893 | 1544 | RX_MATCH_COPIED_on(rx); |
| 07bc277f NC |
1545 | off = RX_OFFS(rx)[0].start = s - t; |
| 1546 | RX_OFFS(rx)[0].end = off + RX_MINLENRET(rx); | |
| 14977893 JH |
1547 | } |
| 1548 | else { /* startp/endp are used by @- @+. */ | |
| 07bc277f NC |
1549 | RX_OFFS(rx)[0].start = s - truebase; |
| 1550 | RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx); | |
| 14977893 | 1551 | } |
| 7e1a2c8d DM |
1552 | /* match via INTUIT shouldn't have any captures. Let @-, @+, $^N know */ |
| 1553 | assert(!RX_NPARENS(rx)); | |
| 1554 | RX_LASTPAREN(rx) = RX_LASTCLOSEPAREN(rx) = 0; | |
| 4633a7c4 | 1555 | LEAVE_SCOPE(oldsave); |
| a0d0e21e LW |
1556 | RETPUSHYES; |
| 1557 | ||
| 1558 | nope: | |
| a0d0e21e | 1559 | ret_no: |
| d65afb4b | 1560 | if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) { |
| a0d0e21e | 1561 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) { |
| 6136c704 | 1562 | MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global); |
| a0d0e21e | 1563 | if (mg) |
| 565764a8 | 1564 | mg->mg_len = -1; |
| a0d0e21e LW |
1565 | } |
| 1566 | } | |
| 4633a7c4 | 1567 | LEAVE_SCOPE(oldsave); |
| a0d0e21e LW |
1568 | if (gimme == G_ARRAY) |
| 1569 | RETURN; | |
| 1570 | RETPUSHNO; | |
| 1571 | } | |
| 1572 | ||
| 1573 | OP * | |
| 864dbfa3 | 1574 | Perl_do_readline(pTHX) |
| a0d0e21e | 1575 | { |
| 27da23d5 | 1576 | dVAR; dSP; dTARGETSTACKED; |
| eb578fdb | 1577 | SV *sv; |
| a0d0e21e LW |
1578 | STRLEN tmplen = 0; |
| 1579 | STRLEN offset; | |
| 760ac839 | 1580 | PerlIO *fp; |
| eb578fdb KW |
1581 | IO * const io = GvIO(PL_last_in_gv); |
| 1582 | const I32 type = PL_op->op_type; | |
| a3b680e6 | 1583 | const I32 gimme = GIMME_V; |
| a0d0e21e | 1584 | |
| 6136c704 | 1585 | if (io) { |
| 50db69d8 | 1586 | const MAGIC *const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar); |
| 6136c704 | 1587 | if (mg) { |
| 50db69d8 | 1588 | Perl_tied_method(aTHX_ "READLINE", SP, MUTABLE_SV(io), mg, gimme, 0); |
| 6136c704 | 1589 | if (gimme == G_SCALAR) { |
| 50db69d8 NC |
1590 | SPAGAIN; |
| 1591 | SvSetSV_nosteal(TARG, TOPs); | |
| 1592 | SETTARG; | |
| 6136c704 | 1593 | } |
| 50db69d8 | 1594 | return NORMAL; |
| 0b7c7b4f | 1595 | } |
| e79b0511 | 1596 | } |
| 4608196e | 1597 | fp = NULL; |
| a0d0e21e LW |
1598 | if (io) { |
| 1599 | fp = IoIFP(io); | |
| 1600 | if (!fp) { | |
| 1601 | if (IoFLAGS(io) & IOf_ARGV) { | |
| 1602 | if (IoFLAGS(io) & IOf_START) { | |
| a0d0e21e | 1603 | IoLINES(io) = 0; |
| 3280af22 | 1604 | if (av_len(GvAVn(PL_last_in_gv)) < 0) { |
| 1d7c1841 | 1605 | IoFLAGS(io) &= ~IOf_START; |
| 4608196e | 1606 | do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,NULL); |
| 4bac9ae4 | 1607 | SvTAINTED_off(GvSVn(PL_last_in_gv)); /* previous tainting irrelevant */ |
| 76f68e9b | 1608 | sv_setpvs(GvSVn(PL_last_in_gv), "-"); |
| 3280af22 | 1609 | SvSETMAGIC(GvSV(PL_last_in_gv)); |
| a2008d6d GS |
1610 | fp = IoIFP(io); |
| 1611 | goto have_fp; | |
| a0d0e21e LW |
1612 | } |
| 1613 | } | |
| 3280af22 | 1614 | fp = nextargv(PL_last_in_gv); |
| a0d0e21e | 1615 | if (!fp) { /* Note: fp != IoIFP(io) */ |
| 3280af22 | 1616 | (void)do_close(PL_last_in_gv, FALSE); /* now it does*/ |
| a0d0e21e LW |
1617 | } |
| 1618 | } | |
| 0d44d22b NC |
1619 | else if (type == OP_GLOB) |
| 1620 | fp = Perl_start_glob(aTHX_ POPs, io); | |
| a0d0e21e LW |
1621 | } |
| 1622 | else if (type == OP_GLOB) | |
| 1623 | SP--; | |
| 7716c5c5 | 1624 | else if (IoTYPE(io) == IoTYPE_WRONLY) { |
| a5390457 | 1625 | report_wrongway_fh(PL_last_in_gv, '>'); |
| a00b5bd3 | 1626 | } |
| a0d0e21e LW |
1627 | } |
| 1628 | if (!fp) { | |
| 041457d9 DM |
1629 | if ((!io || !(IoFLAGS(io) & IOf_START)) |
| 1630 | && ckWARN2(WARN_GLOB, WARN_CLOSED)) | |
| 1631 | { | |
| 3f4520fe | 1632 | if (type == OP_GLOB) |
| 63922903 | 1633 | Perl_ck_warner_d(aTHX_ packWARN(WARN_GLOB), |
| af8c498a GS |
1634 | "glob failed (can't start child: %s)", |
| 1635 | Strerror(errno)); | |
| 69282e91 | 1636 | else |
| 831e4cc3 | 1637 | report_evil_fh(PL_last_in_gv); |
| 3f4520fe | 1638 | } |
| 54310121 | 1639 | if (gimme == G_SCALAR) { |
| 79628082 | 1640 | /* undef TARG, and push that undefined value */ |
| ba92458f AE |
1641 | if (type != OP_RCATLINE) { |
| 1642 | SV_CHECK_THINKFIRST_COW_DROP(TARG); | |
| 0c34ef67 | 1643 | SvOK_off(TARG); |
| ba92458f | 1644 | } |
| a0d0e21e LW |
1645 | PUSHTARG; |
| 1646 | } | |
| 1647 | RETURN; | |
| 1648 | } | |
| a2008d6d | 1649 | have_fp: |
| 54310121 | 1650 | if (gimme == G_SCALAR) { |
| a0d0e21e | 1651 | sv = TARG; |
| 0f722b55 RGS |
1652 | if (type == OP_RCATLINE && SvGMAGICAL(sv)) |
| 1653 | mg_get(sv); | |
| 48de12d9 RGS |
1654 | if (SvROK(sv)) { |
| 1655 | if (type == OP_RCATLINE) | |
| 5668452f | 1656 | SvPV_force_nomg_nolen(sv); |
| 48de12d9 RGS |
1657 | else |
| 1658 | sv_unref(sv); | |
| 1659 | } | |
| f7877b28 | 1660 | else if (isGV_with_GP(sv)) { |
| 5668452f | 1661 | SvPV_force_nomg_nolen(sv); |
| f7877b28 | 1662 | } |
| 862a34c6 | 1663 | SvUPGRADE(sv, SVt_PV); |
| a0d0e21e | 1664 | tmplen = SvLEN(sv); /* remember if already alloced */ |
| f72e8700 JJ |
1665 | if (!tmplen && !SvREADONLY(sv)) { |
| 1666 | /* try short-buffering it. Please update t/op/readline.t | |
| 1667 | * if you change the growth length. | |
| 1668 | */ | |
| 1669 | Sv_Grow(sv, 80); | |
| 1670 | } | |
| 2b5e58c4 AMS |
1671 | offset = 0; |
| 1672 | if (type == OP_RCATLINE && SvOK(sv)) { | |
| 1673 | if (!SvPOK(sv)) { | |
| 5668452f | 1674 | SvPV_force_nomg_nolen(sv); |
| 2b5e58c4 | 1675 | } |
| a0d0e21e | 1676 | offset = SvCUR(sv); |
| 2b5e58c4 | 1677 | } |
| a0d0e21e | 1678 | } |
| 54310121 | 1679 | else { |
| 561b68a9 | 1680 | sv = sv_2mortal(newSV(80)); |
| 54310121 | 1681 | offset = 0; |
| 1682 | } | |
| fbad3eb5 | 1683 | |
| 3887d568 AP |
1684 | /* This should not be marked tainted if the fp is marked clean */ |
| 1685 | #define MAYBE_TAINT_LINE(io, sv) \ | |
| 1686 | if (!(IoFLAGS(io) & IOf_UNTAINT)) { \ | |
| 1687 | TAINT; \ | |
| 1688 | SvTAINTED_on(sv); \ | |
| 1689 | } | |
| 1690 | ||
| 684bef36 | 1691 | /* delay EOF state for a snarfed empty file */ |
| fbad3eb5 | 1692 | #define SNARF_EOF(gimme,rs,io,sv) \ |
| 684bef36 | 1693 | (gimme != G_SCALAR || SvCUR(sv) \ |
| b9fee9ba | 1694 | || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs)) |
| fbad3eb5 | 1695 | |
| a0d0e21e | 1696 | for (;;) { |
| 09e8efcc | 1697 | PUTBACK; |
| fbad3eb5 | 1698 | if (!sv_gets(sv, fp, offset) |
| 2d726892 TF |
1699 | && (type == OP_GLOB |
| 1700 | || SNARF_EOF(gimme, PL_rs, io, sv) | |
| 1701 | || PerlIO_error(fp))) | |
| fbad3eb5 | 1702 | { |
| 760ac839 | 1703 | PerlIO_clearerr(fp); |
| a0d0e21e | 1704 | if (IoFLAGS(io) & IOf_ARGV) { |
| 3280af22 | 1705 | fp = nextargv(PL_last_in_gv); |
| a0d0e21e LW |
1706 | if (fp) |
| 1707 | continue; | |
| 3280af22 | 1708 | (void)do_close(PL_last_in_gv, FALSE); |
| a0d0e21e LW |
1709 | } |
| 1710 | else if (type == OP_GLOB) { | |
| a2a5de95 NC |
1711 | if (!do_close(PL_last_in_gv, FALSE)) { |
| 1712 | Perl_ck_warner(aTHX_ packWARN(WARN_GLOB), | |
| 1713 | "glob failed (child exited with status %d%s)", | |
| 1714 | (int)(STATUS_CURRENT >> 8), | |
| 1715 | (STATUS_CURRENT & 0x80) ? ", core dumped" : ""); | |
| 4eb79ab5 | 1716 | } |
| a0d0e21e | 1717 | } |
| 54310121 | 1718 | if (gimme == G_SCALAR) { |
| ba92458f AE |
1719 | if (type != OP_RCATLINE) { |
| 1720 | SV_CHECK_THINKFIRST_COW_DROP(TARG); | |
| 0c34ef67 | 1721 | SvOK_off(TARG); |
| ba92458f | 1722 | } |
| 09e8efcc | 1723 | SPAGAIN; |
| a0d0e21e LW |
1724 | PUSHTARG; |
| 1725 | } | |
| 3887d568 | 1726 | MAYBE_TAINT_LINE(io, sv); |
| a0d0e21e LW |
1727 | RETURN; |
| 1728 | } | |
| 3887d568 | 1729 | MAYBE_TAINT_LINE(io, sv); |
| a0d0e21e | 1730 | IoLINES(io)++; |
| b9fee9ba | 1731 | IoFLAGS(io) |= IOf_NOLINE; |
| 71be2cbc | 1732 | SvSETMAGIC(sv); |
| 09e8efcc | 1733 | SPAGAIN; |
| a0d0e21e | 1734 | XPUSHs(sv); |
| a0d0e21e | 1735 | if (type == OP_GLOB) { |
| 349d4f2f | 1736 | const char *t1; |
| a0d0e21e | 1737 | |
| 3280af22 | 1738 | if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) { |
| 6136c704 | 1739 | char * const tmps = SvEND(sv) - 1; |
| aa07b2f6 | 1740 | if (*tmps == *SvPVX_const(PL_rs)) { |
| c07a80fd | 1741 | *tmps = '\0'; |
| b162af07 | 1742 | SvCUR_set(sv, SvCUR(sv) - 1); |
| c07a80fd | 1743 | } |
| 1744 | } | |
| 349d4f2f | 1745 | for (t1 = SvPVX_const(sv); *t1; t1++) |
| 937b2e03 | 1746 | if (!isALNUMC(*t1) && |
| 349d4f2f | 1747 | strchr("$&*(){}[]'\";\\|?<>~`", *t1)) |
| a0d0e21e | 1748 | break; |
| 349d4f2f | 1749 | if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) { |
| a0d0e21e LW |
1750 | (void)POPs; /* Unmatched wildcard? Chuck it... */ |
| 1751 | continue; | |
| 1752 | } | |
| 2d79bf7f | 1753 | } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */ |
| d4c19fe8 AL |
1754 | if (ckWARN(WARN_UTF8)) { |
| 1755 | const U8 * const s = (const U8*)SvPVX_const(sv) + offset; | |
| 1756 | const STRLEN len = SvCUR(sv) - offset; | |
| 1757 | const U8 *f; | |
| 1758 | ||
| 1759 | if (!is_utf8_string_loc(s, len, &f)) | |
| 1760 | /* Emulate :encoding(utf8) warning in the same case. */ | |
| 1761 | Perl_warner(aTHX_ packWARN(WARN_UTF8), | |
| 1762 | "utf8 \"\\x%02X\" does not map to Unicode", | |
| 1763 | f < (U8*)SvEND(sv) ? *f : 0); | |
| 1764 | } | |
| a0d0e21e | 1765 | } |
| 54310121 | 1766 | if (gimme == G_ARRAY) { |
| a0d0e21e | 1767 | if (SvLEN(sv) - SvCUR(sv) > 20) { |
| 1da4ca5f | 1768 | SvPV_shrink_to_cur(sv); |
| a0d0e21e | 1769 | } |
| 561b68a9 | 1770 | sv = sv_2mortal(newSV(80)); |
| a0d0e21e LW |
1771 | continue; |
| 1772 | } | |
| 54310121 | 1773 | else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) { |
| a0d0e21e | 1774 | /* try to reclaim a bit of scalar space (only on 1st alloc) */ |
| d5b5861b NC |
1775 | const STRLEN new_len |
| 1776 | = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */ | |
| 1da4ca5f | 1777 | SvPV_renew(sv, new_len); |
| a0d0e21e LW |
1778 | } |
| 1779 | RETURN; | |
| 1780 | } | |
| 1781 | } | |
| 1782 | ||
| a0d0e21e LW |
1783 | PP(pp_helem) |
| 1784 | { | |
| 97aff369 | 1785 | dVAR; dSP; |
| 760ac839 | 1786 | HE* he; |
| ae77835f | 1787 | SV **svp; |
| c445ea15 | 1788 | SV * const keysv = POPs; |
| 85fbaab2 | 1789 | HV * const hv = MUTABLE_HV(POPs); |
| a3b680e6 AL |
1790 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
| 1791 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
| be6c24e0 | 1792 | SV *sv; |
| 92970b93 | 1793 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
| d30e492c | 1794 | bool preeminent = TRUE; |
| a0d0e21e | 1795 | |
| d4c19fe8 | 1796 | if (SvTYPE(hv) != SVt_PVHV) |
| a0d0e21e | 1797 | RETPUSHUNDEF; |
| d4c19fe8 | 1798 | |
| 92970b93 | 1799 | if (localizing) { |
| d4c19fe8 AL |
1800 | MAGIC *mg; |
| 1801 | HV *stash; | |
| d30e492c VP |
1802 | |
| 1803 | /* If we can determine whether the element exist, | |
| 1804 | * Try to preserve the existenceness of a tied hash | |
| 1805 | * element by using EXISTS and DELETE if possible. | |
| 1806 | * Fallback to FETCH and STORE otherwise. */ | |
| 2c5f48c2 | 1807 | if (SvCANEXISTDELETE(hv)) |
| d30e492c | 1808 | preeminent = hv_exists_ent(hv, keysv, 0); |
| d4c19fe8 | 1809 | } |
| d30e492c | 1810 | |
| 5f9d7e2b | 1811 | he = hv_fetch_ent(hv, keysv, lval && !defer, 0); |
| d4c19fe8 | 1812 | svp = he ? &HeVAL(he) : NULL; |
| a0d0e21e | 1813 | if (lval) { |
| 746f6409 | 1814 | if (!svp || !*svp || *svp == &PL_sv_undef) { |
| 68dc0745 | 1815 | SV* lv; |
| 1816 | SV* key2; | |
| 2d8e6c8d | 1817 | if (!defer) { |
| be2597df | 1818 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); |
| 2d8e6c8d | 1819 | } |
| 68dc0745 | 1820 | lv = sv_newmortal(); |
| 1821 | sv_upgrade(lv, SVt_PVLV); | |
| 1822 | LvTYPE(lv) = 'y'; | |
| 6136c704 | 1823 | sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0); |
| 68dc0745 | 1824 | SvREFCNT_dec(key2); /* sv_magic() increments refcount */ |
| b37c2d43 | 1825 | LvTARG(lv) = SvREFCNT_inc_simple(hv); |
| 68dc0745 | 1826 | LvTARGLEN(lv) = 1; |
| 1827 | PUSHs(lv); | |
| 1828 | RETURN; | |
| 1829 | } | |
| 92970b93 | 1830 | if (localizing) { |
| bfcb3514 | 1831 | if (HvNAME_get(hv) && isGV(*svp)) |
| 159b6efe | 1832 | save_gp(MUTABLE_GV(*svp), !(PL_op->op_flags & OPf_SPECIAL)); |
| 47cfc530 VP |
1833 | else if (preeminent) |
| 1834 | save_helem_flags(hv, keysv, svp, | |
| 1835 | (PL_op->op_flags & OPf_SPECIAL) ? 0 : SAVEf_SETMAGIC); | |
| 1836 | else | |
| 1837 | SAVEHDELETE(hv, keysv); | |
| 5f05dabc | 1838 | } |
| 9026059d GG |
1839 | else if (PL_op->op_private & OPpDEREF) { |
| 1840 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
| 1841 | RETURN; | |
| 1842 | } | |
| a0d0e21e | 1843 | } |
| 746f6409 | 1844 | sv = (svp && *svp ? *svp : &PL_sv_undef); |
| fd69380d DM |
1845 | /* Originally this did a conditional C<sv = sv_mortalcopy(sv)>; this |
| 1846 | * was to make C<local $tied{foo} = $tied{foo}> possible. | |
| 1847 | * However, it seems no longer to be needed for that purpose, and | |
| 1848 | * introduced a new bug: stuff like C<while ($hash{taintedval} =~ /.../g> | |
| 1849 | * would loop endlessly since the pos magic is getting set on the | |
| 1850 | * mortal copy and lost. However, the copy has the effect of | |
| 1851 | * triggering the get magic, and losing it altogether made things like | |
| 1852 | * c<$tied{foo};> in void context no longer do get magic, which some | |
| 1853 | * code relied on. Also, delayed triggering of magic on @+ and friends | |
| 1854 | * meant the original regex may be out of scope by now. So as a | |
| 1855 | * compromise, do the get magic here. (The MGf_GSKIP flag will stop it | |
| 1856 | * being called too many times). */ | |
| 39cf747a | 1857 | if (!lval && SvRMAGICAL(hv) && SvGMAGICAL(sv)) |
| fd69380d | 1858 | mg_get(sv); |
| be6c24e0 | 1859 | PUSHs(sv); |
| a0d0e21e LW |
1860 | RETURN; |
| 1861 | } | |
| 1862 | ||
| a0d0e21e LW |
1863 | PP(pp_iter) |
| 1864 | { | |
| 97aff369 | 1865 | dVAR; dSP; |
| eb578fdb | 1866 | PERL_CONTEXT *cx; |
| dc09a129 | 1867 | SV *sv, *oldsv; |
| 1d7c1841 | 1868 | SV **itersvp; |
| d01136d6 BS |
1869 | AV *av = NULL; /* used for LOOP_FOR on arrays and the stack */ |
| 1870 | bool av_is_stack = FALSE; | |
| a0d0e21e | 1871 | |
| 924508f0 | 1872 | EXTEND(SP, 1); |
| a0d0e21e | 1873 | cx = &cxstack[cxstack_ix]; |
| 3b719c58 | 1874 | if (!CxTYPE_is_LOOP(cx)) |
| 5637ef5b | 1875 | DIE(aTHX_ "panic: pp_iter, type=%u", CxTYPE(cx)); |
| a0d0e21e | 1876 | |
| 1d7c1841 | 1877 | itersvp = CxITERVAR(cx); |
| d01136d6 | 1878 | if (CxTYPE(cx) == CXt_LOOP_LAZYSV) { |
| 89ea2908 | 1879 | /* string increment */ |
| d01136d6 BS |
1880 | SV* cur = cx->blk_loop.state_u.lazysv.cur; |
| 1881 | SV *end = cx->blk_loop.state_u.lazysv.end; | |
| 267cc4a8 NC |
1882 | /* If the maximum is !SvOK(), pp_enteriter substitutes PL_sv_no. |
| 1883 | It has SvPVX of "" and SvCUR of 0, which is what we want. */ | |
| 4fe3f0fa | 1884 | STRLEN maxlen = 0; |
| d01136d6 | 1885 | const char *max = SvPV_const(end, maxlen); |
| 89ea2908 | 1886 | if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) { |
| 1d7c1841 | 1887 | if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) { |
| eaa5c2d6 | 1888 | /* safe to reuse old SV */ |
| 1d7c1841 | 1889 | sv_setsv(*itersvp, cur); |
| eaa5c2d6 | 1890 | } |
| 1c846c1f | 1891 | else |
| eaa5c2d6 GA |
1892 | { |
| 1893 | /* we need a fresh SV every time so that loop body sees a | |
| 1894 | * completely new SV for closures/references to work as | |
| 1895 | * they used to */ | |
| dc09a129 | 1896 | oldsv = *itersvp; |
| 1d7c1841 | 1897 | *itersvp = newSVsv(cur); |
| dc09a129 | 1898 | SvREFCNT_dec(oldsv); |
| eaa5c2d6 | 1899 | } |
| aa07b2f6 | 1900 | if (strEQ(SvPVX_const(cur), max)) |
| 89ea2908 GA |
1901 | sv_setiv(cur, 0); /* terminate next time */ |
| 1902 | else | |
| 1903 | sv_inc(cur); | |
| 1904 | RETPUSHYES; | |
| 1905 | } | |
| 1906 | RETPUSHNO; | |
| d01136d6 BS |
1907 | } |
| 1908 | else if (CxTYPE(cx) == CXt_LOOP_LAZYIV) { | |
| 89ea2908 | 1909 | /* integer increment */ |
| d01136d6 | 1910 | if (cx->blk_loop.state_u.lazyiv.cur > cx->blk_loop.state_u.lazyiv.end) |
| 89ea2908 | 1911 | RETPUSHNO; |
| 7f61b687 | 1912 | |
| 3db8f154 | 1913 | /* don't risk potential race */ |
| 1d7c1841 | 1914 | if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) { |
| eaa5c2d6 | 1915 | /* safe to reuse old SV */ |
| cdc1aa42 | 1916 | sv_setiv(*itersvp, cx->blk_loop.state_u.lazyiv.cur); |
| eaa5c2d6 | 1917 | } |
| 1c846c1f | 1918 | else |
| eaa5c2d6 GA |
1919 | { |
| 1920 | /* we need a fresh SV every time so that loop body sees a | |
| 1921 | * completely new SV for closures/references to work as they | |
| 1922 | * used to */ | |
| dc09a129 | 1923 | oldsv = *itersvp; |
| cdc1aa42 | 1924 | *itersvp = newSViv(cx->blk_loop.state_u.lazyiv.cur); |
| dc09a129 | 1925 | SvREFCNT_dec(oldsv); |
| eaa5c2d6 | 1926 | } |
| a2309040 | 1927 | |
| cdc1aa42 NC |
1928 | if (cx->blk_loop.state_u.lazyiv.cur == IV_MAX) { |
| 1929 | /* Handle end of range at IV_MAX */ | |
| 1930 | cx->blk_loop.state_u.lazyiv.end = IV_MIN; | |
| 1931 | } else | |
| 1932 | ++cx->blk_loop.state_u.lazyiv.cur; | |
| a2309040 | 1933 | |
| 89ea2908 GA |
1934 | RETPUSHYES; |
| 1935 | } | |
| 1936 | ||
| 1937 | /* iterate array */ | |
| d01136d6 BS |
1938 | assert(CxTYPE(cx) == CXt_LOOP_FOR); |
| 1939 | av = cx->blk_loop.state_u.ary.ary; | |
| 1940 | if (!av) { | |
| 1941 | av_is_stack = TRUE; | |
| 1942 | av = PL_curstack; | |
| 1943 | } | |
| ef3e5ea9 | 1944 | if (PL_op->op_private & OPpITER_REVERSED) { |
| d01136d6 BS |
1945 | if (cx->blk_loop.state_u.ary.ix <= (av_is_stack |
| 1946 | ? cx->blk_loop.resetsp + 1 : 0)) | |
| ef3e5ea9 | 1947 | RETPUSHNO; |
| a0d0e21e | 1948 | |
| ef3e5ea9 | 1949 | if (SvMAGICAL(av) || AvREIFY(av)) { |
| d01136d6 | 1950 | SV * const * const svp = av_fetch(av, --cx->blk_loop.state_u.ary.ix, FALSE); |
| a0714e2c | 1951 | sv = svp ? *svp : NULL; |
| ef3e5ea9 NC |
1952 | } |
| 1953 | else { | |
| d01136d6 | 1954 | sv = AvARRAY(av)[--cx->blk_loop.state_u.ary.ix]; |
| ef3e5ea9 | 1955 | } |
| d42935ef JH |
1956 | } |
| 1957 | else { | |
| d01136d6 | 1958 | if (cx->blk_loop.state_u.ary.ix >= (av_is_stack ? cx->blk_oldsp : |
| ef3e5ea9 NC |
1959 | AvFILL(av))) |
| 1960 | RETPUSHNO; | |
| 1961 | ||
| 1962 | if (SvMAGICAL(av) || AvREIFY(av)) { | |
| d01136d6 | 1963 | SV * const * const svp = av_fetch(av, ++cx->blk_loop.state_u.ary.ix, FALSE); |
| a0714e2c | 1964 | sv = svp ? *svp : NULL; |
| ef3e5ea9 NC |
1965 | } |
| 1966 | else { | |
| d01136d6 | 1967 | sv = AvARRAY(av)[++cx->blk_loop.state_u.ary.ix]; |
| ef3e5ea9 | 1968 | } |
| d42935ef | 1969 | } |
| ef3e5ea9 | 1970 | |
| 0565a181 | 1971 | if (sv && SvIS_FREED(sv)) { |
| a0714e2c | 1972 | *itersvp = NULL; |
| b6c83531 | 1973 | Perl_croak(aTHX_ "Use of freed value in iteration"); |
| cccede53 DM |
1974 | } |
| 1975 | ||
| d01136d6 | 1976 | if (sv) { |
| a0d0e21e | 1977 | SvTEMP_off(sv); |
| d01136d6 BS |
1978 | SvREFCNT_inc_simple_void_NN(sv); |
| 1979 | } | |
| a0d0e21e | 1980 | else |
| 3280af22 | 1981 | sv = &PL_sv_undef; |
| d01136d6 BS |
1982 | if (!av_is_stack && sv == &PL_sv_undef) { |
| 1983 | SV *lv = newSV_type(SVt_PVLV); | |
| 1984 | LvTYPE(lv) = 'y'; | |
| 1985 | sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0); | |
| b37c2d43 | 1986 | LvTARG(lv) = SvREFCNT_inc_simple(av); |
| d01136d6 | 1987 | LvTARGOFF(lv) = cx->blk_loop.state_u.ary.ix; |
| 42718184 | 1988 | LvTARGLEN(lv) = (STRLEN)UV_MAX; |
| d01136d6 | 1989 | sv = lv; |
| 5f05dabc | 1990 | } |
| a0d0e21e | 1991 | |
| dc09a129 | 1992 | oldsv = *itersvp; |
| d01136d6 | 1993 | *itersvp = sv; |
| dc09a129 DM |
1994 | SvREFCNT_dec(oldsv); |
| 1995 | ||
| a0d0e21e LW |
1996 | RETPUSHYES; |
| 1997 | } | |
| 1998 | ||
| ef07e810 DM |
1999 | /* |
| 2000 | A description of how taint works in pattern matching and substitution. | |
| 2001 | ||
| 284167a5 S |
2002 | This is all conditional on NO_TAINT_SUPPORT not being defined. Under |
| 2003 | NO_TAINT_SUPPORT, taint-related operations should become no-ops. | |
| 2004 | ||
| 4e19c54b | 2005 | While the pattern is being assembled/concatenated and then compiled, |
| 284167a5 S |
2006 | PL_tainted will get set (via TAINT_set) if any component of the pattern |
| 2007 | is tainted, e.g. /.*$tainted/. At the end of pattern compilation, | |
| 2008 | the RXf_TAINTED flag is set on the pattern if PL_tainted is set (via | |
| 2009 | TAINT_get). | |
| ef07e810 | 2010 | |
| 0ab462a6 DM |
2011 | When the pattern is copied, e.g. $r = qr/..../, the SV holding the ref to |
| 2012 | the pattern is marked as tainted. This means that subsequent usage, such | |
| 284167a5 S |
2013 | as /x$r/, will set PL_tainted using TAINT_set, and thus RXf_TAINTED, |
| 2014 | on the new pattern too. | |
| ef07e810 DM |
2015 | |
| 2016 | During execution of a pattern, locale-variant ops such as ALNUML set the | |
| 2017 | local flag RF_tainted. At the end of execution, the engine sets the | |
| 0ab462a6 DM |
2018 | RXf_TAINTED_SEEN on the pattern if RF_tainted got set, or clears it |
| 2019 | otherwise. | |
| ef07e810 DM |
2020 | |
| 2021 | In addition, RXf_TAINTED_SEEN is used post-execution by the get magic code | |
| 2022 | of $1 et al to indicate whether the returned value should be tainted. | |
| 2023 | It is the responsibility of the caller of the pattern (i.e. pp_match, | |
| 2024 | pp_subst etc) to set this flag for any other circumstances where $1 needs | |
| 2025 | to be tainted. | |
| 2026 | ||
| 2027 | The taint behaviour of pp_subst (and pp_substcont) is quite complex. | |
| 2028 | ||
| 2029 | There are three possible sources of taint | |
| 2030 | * the source string | |
| 2031 | * the pattern (both compile- and run-time, RXf_TAINTED / RXf_TAINTED_SEEN) | |
| 2032 | * the replacement string (or expression under /e) | |
| 2033 | ||
| 2034 | There are four destinations of taint and they are affected by the sources | |
| 2035 | according to the rules below: | |
| 2036 | ||
| 2037 | * the return value (not including /r): | |
| 2038 | tainted by the source string and pattern, but only for the | |
| 2039 | number-of-iterations case; boolean returns aren't tainted; | |
| 2040 | * the modified string (or modified copy under /r): | |
| 2041 | tainted by the source string, pattern, and replacement strings; | |
| 2042 | * $1 et al: | |
| 2043 | tainted by the pattern, and under 'use re "taint"', by the source | |
| 2044 | string too; | |
| 2045 | * PL_taint - i.e. whether subsequent code (e.g. in a /e block) is tainted: | |
| 2046 | should always be unset before executing subsequent code. | |
| 2047 | ||
| 2048 | The overall action of pp_subst is: | |
| 2049 | ||
| 2050 | * at the start, set bits in rxtainted indicating the taint status of | |
| 2051 | the various sources. | |
| 2052 | ||
| 2053 | * After each pattern execution, update the SUBST_TAINT_PAT bit in | |
| 2054 | rxtainted if RXf_TAINTED_SEEN has been set, to indicate that the | |
| 2055 | pattern has subsequently become tainted via locale ops. | |
| 2056 | ||
| 2057 | * If control is being passed to pp_substcont to execute a /e block, | |
| 2058 | save rxtainted in the CXt_SUBST block, for future use by | |
| 2059 | pp_substcont. | |
| 2060 | ||
| 2061 | * Whenever control is being returned to perl code (either by falling | |
| 2062 | off the "end" of pp_subst/pp_substcont, or by entering a /e block), | |
| 2063 | use the flag bits in rxtainted to make all the appropriate types of | |
| 0ab462a6 DM |
2064 | destination taint visible; e.g. set RXf_TAINTED_SEEN so that $1 |
| 2065 | et al will appear tainted. | |
| ef07e810 DM |
2066 | |
| 2067 | pp_match is just a simpler version of the above. | |
| 2068 | ||
| 2069 | */ | |
| 2070 | ||
| a0d0e21e LW |
2071 | PP(pp_subst) |
| 2072 | { | |
| 97aff369 | 2073 | dVAR; dSP; dTARG; |
| eb578fdb | 2074 | PMOP *pm = cPMOP; |
| a0d0e21e | 2075 | PMOP *rpm = pm; |
| eb578fdb | 2076 | char *s; |
| a0d0e21e | 2077 | char *strend; |
| eb578fdb | 2078 | char *m; |
| 5c144d81 | 2079 | const char *c; |
| eb578fdb | 2080 | char *d; |
| a0d0e21e LW |
2081 | STRLEN clen; |
| 2082 | I32 iters = 0; | |
| 2083 | I32 maxiters; | |
| eb578fdb | 2084 | I32 i; |
| a0d0e21e | 2085 | bool once; |
| ef07e810 DM |
2086 | U8 rxtainted = 0; /* holds various SUBST_TAINT_* flag bits. |
| 2087 | See "how taint works" above */ | |
| a0d0e21e | 2088 | char *orig; |
| 1ed74d04 | 2089 | U8 r_flags; |
| eb578fdb | 2090 | REGEXP *rx = PM_GETRE(pm); |
| a0d0e21e LW |
2091 | STRLEN len; |
| 2092 | int force_on_match = 0; | |
| 0bcc34c2 | 2093 | const I32 oldsave = PL_savestack_ix; |
| 792b2c16 | 2094 | STRLEN slen; |
| 26a74523 | 2095 | bool doutf8 = FALSE; /* whether replacement is in utf8 */ |
| f8c7b90f | 2096 | #ifdef PERL_OLD_COPY_ON_WRITE |
| ed252734 NC |
2097 | bool is_cow; |
| 2098 | #endif | |
| a0714e2c | 2099 | SV *nsv = NULL; |
| b770e143 | 2100 | /* known replacement string? */ |
| eb578fdb | 2101 | SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL; |
| a0d0e21e | 2102 | |
| f410a211 NC |
2103 | PERL_ASYNC_CHECK(); |
| 2104 | ||
| 533c011a | 2105 | if (PL_op->op_flags & OPf_STACKED) |
| a0d0e21e | 2106 | TARG = POPs; |
| 59f00321 RGS |
2107 | else if (PL_op->op_private & OPpTARGET_MY) |
| 2108 | GETTARGET; | |
| a0d0e21e | 2109 | else { |
| 54b9620d | 2110 | TARG = DEFSV; |
| a0d0e21e | 2111 | EXTEND(SP,1); |
| 1c846c1f | 2112 | } |
| d9f424b2 | 2113 | |
| 64534138 | 2114 | SvGETMAGIC(TARG); /* must come before cow check */ |
| f8c7b90f | 2115 | #ifdef PERL_OLD_COPY_ON_WRITE |
| ed252734 NC |
2116 | /* Awooga. Awooga. "bool" types that are actually char are dangerous, |
| 2117 | because they make integers such as 256 "false". */ | |
| 2118 | is_cow = SvIsCOW(TARG) ? TRUE : FALSE; | |
| 2119 | #else | |
| 765f542d NC |
2120 | if (SvIsCOW(TARG)) |
| 2121 | sv_force_normal_flags(TARG,0); | |
| ed252734 | 2122 | #endif |
| 8ca8a454 | 2123 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT) |
| f8c7b90f | 2124 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 8ca8a454 | 2125 | && !is_cow |
| ed252734 | 2126 | #endif |
| 8ca8a454 NC |
2127 | && (SvREADONLY(TARG) |
| 2128 | || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG)) | |
| 2129 | || SvTYPE(TARG) > SVt_PVLV) | |
| 2130 | && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))) | |
| 6ad8f254 | 2131 | Perl_croak_no_modify(aTHX); |
| 8ec5e241 NIS |
2132 | PUTBACK; |
| 2133 | ||
| 64534138 | 2134 | s = SvPV_nomg(TARG, len); |
| 4499db73 | 2135 | if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV || SvVOK(TARG)) |
| a0d0e21e | 2136 | force_on_match = 1; |
| 20be6587 DM |
2137 | |
| 2138 | /* only replace once? */ | |
| 2139 | once = !(rpm->op_pmflags & PMf_GLOBAL); | |
| 2140 | ||
| ef07e810 | 2141 | /* See "how taint works" above */ |
| 284167a5 | 2142 | if (TAINTING_get) { |
| 20be6587 DM |
2143 | rxtainted = ( |
| 2144 | (SvTAINTED(TARG) ? SUBST_TAINT_STR : 0) | |
| 284167a5 | 2145 | | (RX_ISTAINTED(rx) ? SUBST_TAINT_PAT : 0) |
| 20be6587 DM |
2146 | | ((pm->op_pmflags & PMf_RETAINT) ? SUBST_TAINT_RETAINT : 0) |
| 2147 | | ((once && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
| 2148 | ? SUBST_TAINT_BOOLRET : 0)); | |
| 2149 | TAINT_NOT; | |
| 2150 | } | |
| a12c0f56 | 2151 | |
| a30b2f1f | 2152 | RX_MATCH_UTF8_set(rx, DO_UTF8(TARG)); |
| d9f424b2 | 2153 | |
| a0d0e21e LW |
2154 | force_it: |
| 2155 | if (!pm || !s) | |
| 5637ef5b | 2156 | DIE(aTHX_ "panic: pp_subst, pm=%p, s=%p", pm, s); |
| a0d0e21e LW |
2157 | |
| 2158 | strend = s + len; | |
| a30b2f1f | 2159 | slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len; |
| 792b2c16 JH |
2160 | maxiters = 2 * slen + 10; /* We can match twice at each |
| 2161 | position, once with zero-length, | |
| 2162 | second time with non-zero. */ | |
| a0d0e21e | 2163 | |
| 6a97c51d | 2164 | if (!RX_PRELEN(rx) && PL_curpm |
| 8d919b0a | 2165 | && !ReANY(rx)->mother_re) { |
| 3280af22 | 2166 | pm = PL_curpm; |
| aaa362c4 | 2167 | rx = PM_GETRE(pm); |
| a0d0e21e | 2168 | } |
| 6502e081 DM |
2169 | |
| 2170 | r_flags = ( RX_NPARENS(rx) | |
| 2171 | || PL_sawampersand | |
| 6502e081 DM |
2172 | || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
| 2173 | ) | |
| 2174 | ? REXEC_COPY_STR | |
| 2175 | : 0; | |
| 7fba1cd6 | 2176 | |
| a0d0e21e | 2177 | orig = m = s; |
| 07bc277f | 2178 | if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT) { |
| ee0b7718 | 2179 | PL_bostr = orig; |
| f9f4320a | 2180 | s = CALLREG_INTUIT_START(rx, TARG, s, strend, r_flags, NULL); |
| f722798b IZ |
2181 | |
| 2182 | if (!s) | |
| df34c13a | 2183 | goto ret_no; |
| f722798b | 2184 | /* How to do it in subst? */ |
| 07bc277f | 2185 | /* if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL) |
| 1c846c1f | 2186 | && !PL_sawampersand |
| a91cc451 | 2187 | && !(RX_EXTFLAGS(rx) & RXf_KEEPCOPY)) |
| f722798b IZ |
2188 | goto yup; |
| 2189 | */ | |
| a0d0e21e | 2190 | } |
| 71be2cbc | 2191 | |
| 8b64c330 DM |
2192 | if (!CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL, |
| 2193 | r_flags | REXEC_CHECKED)) | |
| 2194 | { | |
| 5e79dfb9 DM |
2195 | ret_no: |
| 2196 | SPAGAIN; | |
| 2197 | PUSHs(rpm->op_pmflags & PMf_NONDESTRUCT ? TARG : &PL_sv_no); | |
| 2198 | LEAVE_SCOPE(oldsave); | |
| 2199 | RETURN; | |
| 2200 | } | |
| 2201 | ||
| 1754320d FC |
2202 | PL_curpm = pm; |
| 2203 | ||
| 71be2cbc | 2204 | /* known replacement string? */ |
| f272994b | 2205 | if (dstr) { |
| 8514a05a JH |
2206 | /* replacement needing upgrading? */ |
| 2207 | if (DO_UTF8(TARG) && !doutf8) { | |
| db79b45b | 2208 | nsv = sv_newmortal(); |
| 4a176938 | 2209 | SvSetSV(nsv, dstr); |
| 8514a05a JH |
2210 | if (PL_encoding) |
| 2211 | sv_recode_to_utf8(nsv, PL_encoding); | |
| 2212 | else | |
| 2213 | sv_utf8_upgrade(nsv); | |
| 5c144d81 | 2214 | c = SvPV_const(nsv, clen); |
| 4a176938 JH |
2215 | doutf8 = TRUE; |
| 2216 | } | |
| 2217 | else { | |
| 5c144d81 | 2218 | c = SvPV_const(dstr, clen); |
| 4a176938 | 2219 | doutf8 = DO_UTF8(dstr); |
| 8514a05a | 2220 | } |
| bb933b9b FC |
2221 | |
| 2222 | if (SvTAINTED(dstr)) | |
| 2223 | rxtainted |= SUBST_TAINT_REPL; | |
| f272994b A |
2224 | } |
| 2225 | else { | |
| 6136c704 | 2226 | c = NULL; |
| f272994b A |
2227 | doutf8 = FALSE; |
| 2228 | } | |
| 2229 | ||
| 71be2cbc | 2230 | /* can do inplace substitution? */ |
| ed252734 | 2231 | if (c |
| f8c7b90f | 2232 | #ifdef PERL_OLD_COPY_ON_WRITE |
| ed252734 NC |
2233 | && !is_cow |
| 2234 | #endif | |
| fbfb1899 DM |
2235 | && (I32)clen <= RX_MINLENRET(rx) |
| 2236 | && (once || !(r_flags & REXEC_COPY_STR)) | |
| 1754320d | 2237 | && !(RX_EXTFLAGS(rx) & (RXf_LOOKBEHIND_SEEN|RXf_MODIFIES_VARS)) |
| 8ca8a454 NC |
2238 | && (!doutf8 || SvUTF8(TARG)) |
| 2239 | && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
| 8b030b38 | 2240 | { |
| ec911639 | 2241 | |
| f8c7b90f | 2242 | #ifdef PERL_OLD_COPY_ON_WRITE |
| ed252734 NC |
2243 | if (SvIsCOW(TARG)) { |
| 2244 | assert (!force_on_match); | |
| 2245 | goto have_a_cow; | |
| 2246 | } | |
| 2247 | #endif | |
| 71be2cbc | 2248 | if (force_on_match) { |
| 2249 | force_on_match = 0; | |
| 5c1648b0 | 2250 | s = SvPV_force_nomg(TARG, len); |
| 71be2cbc | 2251 | goto force_it; |
| 2252 | } | |
| 71be2cbc | 2253 | d = s; |
| 71be2cbc | 2254 | if (once) { |
| 20be6587 DM |
2255 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
| 2256 | rxtainted |= SUBST_TAINT_PAT; | |
| 07bc277f NC |
2257 | m = orig + RX_OFFS(rx)[0].start; |
| 2258 | d = orig + RX_OFFS(rx)[0].end; | |
| 71be2cbc | 2259 | s = orig; |
| 2260 | if (m - s > strend - d) { /* faster to shorten from end */ | |
| 2261 | if (clen) { | |
| 2262 | Copy(c, m, clen, char); | |
| 2263 | m += clen; | |
| a0d0e21e | 2264 | } |
| 71be2cbc | 2265 | i = strend - d; |
| 2266 | if (i > 0) { | |
| 2267 | Move(d, m, i, char); | |
| 2268 | m += i; | |
| a0d0e21e | 2269 | } |
| 71be2cbc | 2270 | *m = '\0'; |
| 2271 | SvCUR_set(TARG, m - s); | |
| 2272 | } | |
| 155aba94 | 2273 | else if ((i = m - s)) { /* faster from front */ |
| 71be2cbc | 2274 | d -= clen; |
| 2275 | m = d; | |
| 0d3c21b0 | 2276 | Move(s, d - i, i, char); |
| 71be2cbc | 2277 | sv_chop(TARG, d-i); |
| 71be2cbc | 2278 | if (clen) |
| 2279 | Copy(c, m, clen, char); | |
| 2280 | } | |
| 2281 | else if (clen) { | |
| 2282 | d -= clen; | |
| 2283 | sv_chop(TARG, d); | |
| 2284 | Copy(c, d, clen, char); | |
| 2285 | } | |
| 2286 | else { | |
| 2287 | sv_chop(TARG, d); | |
| 2288 | } | |
| 8ec5e241 | 2289 | SPAGAIN; |
| 8ca8a454 | 2290 | PUSHs(&PL_sv_yes); |
| 71be2cbc | 2291 | } |
| 2292 | else { | |
| 71be2cbc | 2293 | do { |
| 2294 | if (iters++ > maxiters) | |
| cea2e8a9 | 2295 | DIE(aTHX_ "Substitution loop"); |
| 20be6587 DM |
2296 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
| 2297 | rxtainted |= SUBST_TAINT_PAT; | |
| 07bc277f | 2298 | m = RX_OFFS(rx)[0].start + orig; |
| 155aba94 | 2299 | if ((i = m - s)) { |
| 71be2cbc | 2300 | if (s != d) |
| 2301 | Move(s, d, i, char); | |
| 2302 | d += i; | |
| a0d0e21e | 2303 | } |
| 71be2cbc | 2304 | if (clen) { |
| 2305 | Copy(c, d, clen, char); | |
| 2306 | d += clen; | |
| 2307 | } | |
| 07bc277f | 2308 | s = RX_OFFS(rx)[0].end + orig; |
| f9f4320a | 2309 | } while (CALLREGEXEC(rx, s, strend, orig, s == m, |
| f722798b IZ |
2310 | TARG, NULL, |
| 2311 | /* don't match same null twice */ | |
| 2312 | REXEC_NOT_FIRST|REXEC_IGNOREPOS)); | |
| 71be2cbc | 2313 | if (s != d) { |
| 2314 | i = strend - s; | |
| aa07b2f6 | 2315 | SvCUR_set(TARG, d - SvPVX_const(TARG) + i); |
| 71be2cbc | 2316 | Move(s, d, i+1, char); /* include the NUL */ |
| a0d0e21e | 2317 | } |
| 8ec5e241 | 2318 | SPAGAIN; |
| 8ca8a454 | 2319 | mPUSHi((I32)iters); |
| a0d0e21e LW |
2320 | } |
| 2321 | } | |
| ff6e92e8 | 2322 | else { |
| 1754320d FC |
2323 | bool first; |
| 2324 | SV *repl; | |
| a0d0e21e LW |
2325 | if (force_on_match) { |
| 2326 | force_on_match = 0; | |
| 0c1438a1 NC |
2327 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
| 2328 | /* I feel that it should be possible to avoid this mortal copy | |
| 2329 | given that the code below copies into a new destination. | |
| 2330 | However, I suspect it isn't worth the complexity of | |
| 2331 | unravelling the C<goto force_it> for the small number of | |
| 2332 | cases where it would be viable to drop into the copy code. */ | |
| 2333 | TARG = sv_2mortal(newSVsv(TARG)); | |
| 2334 | } | |
| 5c1648b0 | 2335 | s = SvPV_force_nomg(TARG, len); |
| a0d0e21e LW |
2336 | goto force_it; |
| 2337 | } | |
| f8c7b90f | 2338 | #ifdef PERL_OLD_COPY_ON_WRITE |
| ed252734 NC |
2339 | have_a_cow: |
| 2340 | #endif | |
| 20be6587 DM |
2341 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
| 2342 | rxtainted |= SUBST_TAINT_PAT; | |
| 1754320d | 2343 | repl = dstr; |
| 815dd406 | 2344 | dstr = newSVpvn_flags(m, s-m, SVs_TEMP | (DO_UTF8(TARG) ? SVf_UTF8 : 0)); |
| a0d0e21e | 2345 | if (!c) { |
| eb578fdb | 2346 | PERL_CONTEXT *cx; |
| 8ec5e241 | 2347 | SPAGAIN; |
| 20be6587 DM |
2348 | /* note that a whole bunch of local vars are saved here for |
| 2349 | * use by pp_substcont: here's a list of them in case you're | |
| 2350 | * searching for places in this sub that uses a particular var: | |
| 2351 | * iters maxiters r_flags oldsave rxtainted orig dstr targ | |
| 2352 | * s m strend rx once */ | |
| a0d0e21e | 2353 | PUSHSUBST(cx); |
| 20e98b0f | 2354 | RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot); |
| a0d0e21e | 2355 | } |
| cf93c79d | 2356 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
| 1754320d | 2357 | first = TRUE; |
| a0d0e21e LW |
2358 | do { |
| 2359 | if (iters++ > maxiters) | |
| cea2e8a9 | 2360 | DIE(aTHX_ "Substitution loop"); |
| 20be6587 DM |
2361 | if (RX_MATCH_TAINTED(rx)) |
| 2362 | rxtainted |= SUBST_TAINT_PAT; | |
| 07bc277f | 2363 | if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) { |
| a0d0e21e LW |
2364 | m = s; |
| 2365 | s = orig; | |
| 6502e081 | 2366 | assert(RX_SUBOFFSET(rx) == 0); |
| 07bc277f | 2367 | orig = RX_SUBBEG(rx); |
| a0d0e21e LW |
2368 | s = orig + (m - s); |
| 2369 | strend = s + (strend - m); | |
| 2370 | } | |
| 07bc277f | 2371 | m = RX_OFFS(rx)[0].start + orig; |
| 64534138 | 2372 | sv_catpvn_nomg_maybeutf8(dstr, s, m - s, DO_UTF8(TARG)); |
| 07bc277f | 2373 | s = RX_OFFS(rx)[0].end + orig; |
| 1754320d FC |
2374 | if (first) { |
| 2375 | /* replacement already stringified */ | |
| 2376 | if (clen) | |
| 64534138 | 2377 | sv_catpvn_nomg_maybeutf8(dstr, c, clen, doutf8); |
| 1754320d FC |
2378 | first = FALSE; |
| 2379 | } | |
| 2380 | else { | |
| 1754320d FC |
2381 | if (PL_encoding) { |
| 2382 | if (!nsv) nsv = sv_newmortal(); | |
| 2383 | sv_copypv(nsv, repl); | |
| 2384 | if (!DO_UTF8(nsv)) sv_recode_to_utf8(nsv, PL_encoding); | |
| 2385 | sv_catsv(dstr, nsv); | |
| 2386 | } | |
| 2387 | else sv_catsv(dstr, repl); | |
| bb933b9b FC |
2388 | if (SvTAINTED(repl)) |
| 2389 | rxtainted |= SUBST_TAINT_REPL; | |
| 1754320d | 2390 | } |
| a0d0e21e LW |
2391 | if (once) |
| 2392 | break; | |
| f9f4320a | 2393 | } while (CALLREGEXEC(rx, s, strend, orig, s == m, |
| ffc61ed2 | 2394 | TARG, NULL, r_flags)); |
| 64534138 | 2395 | sv_catpvn_nomg_maybeutf8(dstr, s, strend - s, DO_UTF8(TARG)); |
| 748a9306 | 2396 | |
| 8ca8a454 NC |
2397 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
| 2398 | /* From here on down we're using the copy, and leaving the original | |
| 2399 | untouched. */ | |
| 2400 | TARG = dstr; | |
| 2401 | SPAGAIN; | |
| 2402 | PUSHs(dstr); | |
| 2403 | } else { | |
| f8c7b90f | 2404 | #ifdef PERL_OLD_COPY_ON_WRITE |
| 8ca8a454 NC |
2405 | /* The match may make the string COW. If so, brilliant, because |
| 2406 | that's just saved us one malloc, copy and free - the regexp has | |
| 2407 | donated the old buffer, and we malloc an entirely new one, rather | |
| 2408 | than the regexp malloc()ing a buffer and copying our original, | |
| 2409 | only for us to throw it away here during the substitution. */ | |
| 2410 | if (SvIsCOW(TARG)) { | |
| 2411 | sv_force_normal_flags(TARG, SV_COW_DROP_PV); | |
| 2412 | } else | |
| ed252734 | 2413 | #endif |
| 8ca8a454 NC |
2414 | { |
| 2415 | SvPV_free(TARG); | |
| 2416 | } | |
| 2417 | SvPV_set(TARG, SvPVX(dstr)); | |
| 2418 | SvCUR_set(TARG, SvCUR(dstr)); | |
| 2419 | SvLEN_set(TARG, SvLEN(dstr)); | |
| 64534138 | 2420 | SvFLAGS(TARG) |= SvUTF8(dstr); |
| 8ca8a454 | 2421 | SvPV_set(dstr, NULL); |
| 748a9306 | 2422 | |
| 8ca8a454 | 2423 | SPAGAIN; |
| 4f4d7508 | 2424 | mPUSHi((I32)iters); |
| 8ca8a454 NC |
2425 | } |
| 2426 | } | |
| 2427 | ||
| 2428 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT)) { | |
| 2429 | (void)SvPOK_only_UTF8(TARG); | |
| a0d0e21e | 2430 | } |
| 20be6587 | 2431 | |
| ef07e810 | 2432 | /* See "how taint works" above */ |
| 284167a5 | 2433 | if (TAINTING_get) { |
| 20be6587 DM |
2434 | if ((rxtainted & SUBST_TAINT_PAT) || |
| 2435 | ((rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) == | |
| 2436 | (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) | |
| 2437 | ) | |
| 2438 | (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */ | |
| 2439 | ||
| 2440 | if (!(rxtainted & SUBST_TAINT_BOOLRET) | |
| 2441 | && (rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT)) | |
| 2442 | ) | |
| 2443 | SvTAINTED_on(TOPs); /* taint return value */ | |
| 2444 | else | |
| 2445 | SvTAINTED_off(TOPs); /* may have got tainted earlier */ | |
| 2446 | ||
| 2447 | /* needed for mg_set below */ | |
| 284167a5 S |
2448 | TAINT_set( |
| 2449 | cBOOL(rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)) | |
| 2450 | ); | |
| 20be6587 DM |
2451 | SvTAINT(TARG); |
| 2452 | } | |
| 2453 | SvSETMAGIC(TARG); /* PL_tainted must be correctly set for this mg_set */ | |
| 2454 | TAINT_NOT; | |
| f1a76097 DM |
2455 | LEAVE_SCOPE(oldsave); |
| 2456 | RETURN; | |
| a0d0e21e LW |
2457 | } |
| 2458 | ||
| 2459 | PP(pp_grepwhile) | |
| 2460 | { | |
| 27da23d5 | 2461 | dVAR; dSP; |
| a0d0e21e LW |
2462 | |
| 2463 | if (SvTRUEx(POPs)) | |
| 3280af22 NIS |
2464 | PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr]; |
| 2465 | ++*PL_markstack_ptr; | |
| b2a2a901 | 2466 | FREETMPS; |
| d343c3ef | 2467 | LEAVE_with_name("grep_item"); /* exit inner scope */ |
| a0d0e21e LW |
2468 | |
| 2469 | /* All done yet? */ | |
| 3280af22 | 2470 | if (PL_stack_base + *PL_markstack_ptr > SP) { |
| a0d0e21e | 2471 | I32 items; |
| c4420975 | 2472 | const I32 gimme = GIMME_V; |
| a0d0e21e | 2473 | |
| d343c3ef | 2474 | LEAVE_with_name("grep"); /* exit outer scope */ |
| a0d0e21e | 2475 | (void)POPMARK; /* pop src */ |
| 3280af22 | 2476 | items = --*PL_markstack_ptr - PL_markstack_ptr[-1]; |
| a0d0e21e | 2477 | (void)POPMARK; /* pop dst */ |
| 3280af22 | 2478 | SP = PL_stack_base + POPMARK; /* pop original mark */ |
| 54310121 | 2479 | if (gimme == G_SCALAR) { |
| 7cc47870 | 2480 | if (PL_op->op_private & OPpGREP_LEX) { |
| c4420975 | 2481 | SV* const sv = sv_newmortal(); |
| 7cc47870 RGS |
2482 | sv_setiv(sv, items); |
| 2483 | PUSHs(sv); | |
| 2484 | } | |
| 2485 | else { | |
| 2486 | dTARGET; | |
| 2487 | XPUSHi(items); | |
| 2488 | } | |
| a0d0e21e | 2489 | } |
| 54310121 | 2490 | else if (gimme == G_ARRAY) |
| 2491 | SP += items; | |
| a0d0e21e LW |
2492 | RETURN; |
| 2493 | } | |
| 2494 | else { | |
| 2495 | SV *src; | |
| 2496 | ||
| d343c3ef | 2497 | ENTER_with_name("grep_item"); /* enter inner scope */ |
| 1d7c1841 | 2498 | SAVEVPTR(PL_curpm); |
| a0d0e21e | 2499 | |
| 3280af22 | 2500 | src = PL_stack_base[*PL_markstack_ptr]; |
| a0d0e21e | 2501 | SvTEMP_off(src); |
| 59f00321 RGS |
2502 | if (PL_op->op_private & OPpGREP_LEX) |
| 2503 | PAD_SVl(PL_op->op_targ) = src; | |
| 2504 | else | |
| 414bf5ae | 2505 | DEFSV_set(src); |
| a0d0e21e LW |
2506 | |
| 2507 | RETURNOP(cLOGOP->op_other); | |
| 2508 | } | |
| 2509 | } | |
| 2510 | ||
| 2511 | PP(pp_leavesub) | |
| 2512 | { | |
| 27da23d5 | 2513 | dVAR; dSP; |
| a0d0e21e LW |
2514 | SV **mark; |
| 2515 | SV **newsp; | |
| 2516 | PMOP *newpm; | |
| 2517 | I32 gimme; | |
| eb578fdb | 2518 | PERL_CONTEXT *cx; |
| b0d9ce38 | 2519 | SV *sv; |
| a0d0e21e | 2520 | |
| 9850bf21 RH |
2521 | if (CxMULTICALL(&cxstack[cxstack_ix])) |
| 2522 | return 0; | |
| 2523 | ||
| a0d0e21e | 2524 | POPBLOCK(cx,newpm); |
| 5dd42e15 | 2525 | cxstack_ix++; /* temporarily protect top context */ |
| 1c846c1f | 2526 | |
| a1f49e72 | 2527 | TAINT_NOT; |
| a0d0e21e LW |
2528 | if (gimme == G_SCALAR) { |
| 2529 | MARK = newsp + 1; | |
| a29cdaf0 | 2530 | if (MARK <= SP) { |
| a8bba7fa | 2531 | if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) { |
| 6f48390a FC |
2532 | if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1 |
| 2533 | && !SvMAGICAL(TOPs)) { | |
| a29cdaf0 IZ |
2534 | *MARK = SvREFCNT_inc(TOPs); |
| 2535 | FREETMPS; | |
| 2536 | sv_2mortal(*MARK); | |
| cd06dffe GS |
2537 | } |
| 2538 | else { | |
| 959e3673 | 2539 | sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */ |
| a29cdaf0 | 2540 | FREETMPS; |
| 959e3673 GS |
2541 | *MARK = sv_mortalcopy(sv); |
| 2542 | SvREFCNT_dec(sv); | |
| a29cdaf0 | 2543 | } |
| cd06dffe | 2544 | } |
| 6f48390a FC |
2545 | else if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1 |
| 2546 | && !SvMAGICAL(TOPs)) { | |
| 767eda44 | 2547 | *MARK = TOPs; |
| 767eda44 | 2548 | } |
| cd06dffe | 2549 | else |
| 767eda44 | 2550 | *MARK = sv_mortalcopy(TOPs); |
| cd06dffe GS |
2551 | } |
| 2552 | else { | |
| f86702cc | 2553 | MEXTEND(MARK, 0); |
| 3280af22 | 2554 | *MARK = &PL_sv_undef; |
| a0d0e21e LW |
2555 | } |
| 2556 | SP = MARK; | |
| 2557 | } | |
| 54310121 | 2558 | else if (gimme == G_ARRAY) { |
| f86702cc | 2559 | for (MARK = newsp + 1; MARK <= SP; MARK++) { |
| 6f48390a FC |
2560 | if (!SvTEMP(*MARK) || SvREFCNT(*MARK) != 1 |
| 2561 | || SvMAGICAL(*MARK)) { | |
| f86702cc | 2562 | *MARK = sv_mortalcopy(*MARK); |
| a1f49e72 CS |
2563 | TAINT_NOT; /* Each item is independent */ |
| 2564 | } | |
| f86702cc | 2565 | } |
| a0d0e21e | 2566 | } |
| f86702cc | 2567 | PUTBACK; |
| 1c846c1f | 2568 | |
| a57c6685 | 2569 | LEAVE; |
| 5dd42e15 | 2570 | cxstack_ix--; |
| b0d9ce38 | 2571 | POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */ |
| 3280af22 | 2572 | PL_curpm = newpm; /* ... and pop $1 et al */ |
| a0d0e21e | 2573 | |
| b0d9ce38 | 2574 | LEAVESUB(sv); |
| f39bc417 | 2575 | return cx->blk_sub.retop; |
| a0d0e21e LW |
2576 | } |
| 2577 | ||
| 2578 | PP(pp_entersub) | |
| 2579 | { | |
| 27da23d5 | 2580 | dVAR; dSP; dPOPss; |
| a0d0e21e | 2581 | GV *gv; |
| eb578fdb KW |
2582 | CV *cv; |
| 2583 | PERL_CONTEXT *cx; | |
| 5d94fbed | 2584 | I32 gimme; |
| a9c4fd4e | 2585 | const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0; |
| a0d0e21e LW |
2586 | |
| 2587 | if (!sv) | |
| cea2e8a9 | 2588 | DIE(aTHX_ "Not a CODE reference"); |
| a0d0e21e | 2589 | switch (SvTYPE(sv)) { |
| f1025168 NC |
2590 | /* This is overwhelming the most common case: */ |
| 2591 | case SVt_PVGV: | |
| 13be902c | 2592 | we_have_a_glob: |
| 159b6efe | 2593 | if (!(cv = GvCVu((const GV *)sv))) { |
| f730a42d | 2594 | HV *stash; |
| f2c0649b | 2595 | cv = sv_2cv(sv, &stash, &gv, 0); |
| f730a42d | 2596 | } |
| f1025168 | 2597 | if (!cv) { |
| a57c6685 | 2598 | ENTER; |
| f1025168 NC |
2599 | SAVETMPS; |
| 2600 | goto try_autoload; | |
| 2601 | } | |
| 2602 | break; | |
| 13be902c FC |
2603 | case SVt_PVLV: |
| 2604 | if(isGV_with_GP(sv)) goto we_have_a_glob; | |
| 2605 | /*FALLTHROUGH*/ | |
| a0d0e21e | 2606 | default: |
| 7c75014e DM |
2607 | if (sv == &PL_sv_yes) { /* unfound import, ignore */ |
| 2608 | if (hasargs) | |
| 2609 | SP = PL_stack_base + POPMARK; | |
| 4d198de3 DM |
2610 | else |
| 2611 | (void)POPMARK; | |
| 7c75014e DM |
2612 | RETURN; |
| 2613 | } | |
| 2614 | SvGETMAGIC(sv); | |
| 2615 | if (SvROK(sv)) { | |
| 93d7320b DM |
2616 | if (SvAMAGIC(sv)) { |
| 2617 | sv = amagic_deref_call(sv, to_cv_amg); | |
| 2618 | /* Don't SPAGAIN here. */ | |
| 2619 | } | |
| 7c75014e DM |
2620 | } |
| 2621 | else { | |
| a9c4fd4e | 2622 | const char *sym; |
| 780a5241 | 2623 | STRLEN len; |
| 79a3e5ea | 2624 | if (!SvOK(sv)) |
| cea2e8a9 | 2625 | DIE(aTHX_ PL_no_usym, "a subroutine"); |
| 79a3e5ea | 2626 | sym = SvPV_nomg_const(sv, len); |
| 533c011a | 2627 | if (PL_op->op_private & HINT_STRICT_REFS) |
| b375e37b | 2628 | DIE(aTHX_ "Can't use string (\"%" SVf32 "\"%s) as a subroutine ref while \"strict refs\" in use", sv, len>32 ? "..." : ""); |
| 780a5241 | 2629 | cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv)); |
| a0d0e21e LW |
2630 | break; |
| 2631 | } | |
| ea726b52 | 2632 | cv = MUTABLE_CV(SvRV(sv)); |
| a0d0e21e LW |
2633 | if (SvTYPE(cv) == SVt_PVCV) |
| 2634 | break; | |
| 2635 | /* FALL THROUGH */ | |
| 2636 | case SVt_PVHV: | |
| 2637 | case SVt_PVAV: | |
| cea2e8a9 | 2638 | DIE(aTHX_ "Not a CODE reference"); |
| f1025168 | 2639 | /* This is the second most common case: */ |
| a0d0e21e | 2640 | case SVt_PVCV: |
| ea726b52 | 2641 | cv = MUTABLE_CV(sv); |
| a0d0e21e | 2642 | break; |
| a0d0e21e LW |
2643 | } |
| 2644 | ||
| a57c6685 | 2645 | ENTER; |
| a0d0e21e LW |
2646 | SAVETMPS; |
| 2647 | ||
| 2648 | retry: | |
| 541ed3a9 FC |
2649 | if (CvCLONE(cv) && ! CvCLONED(cv)) |
| 2650 | DIE(aTHX_ "Closure prototype called"); | |
| a0d0e21e | 2651 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
| 2f349aa0 NC |
2652 | GV* autogv; |
| 2653 | SV* sub_name; | |
| 2654 | ||
| 2655 | /* anonymous or undef'd function leaves us no recourse */ | |
| 7d2057d8 FC |
2656 | if (CvANON(cv) || !(gv = CvGV(cv))) { |
| 2657 | if (CvNAMED(cv)) | |
| 2658 | DIE(aTHX_ "Undefined subroutine &%"HEKf" called", | |
| 2659 | HEKfARG(CvNAME_HEK(cv))); | |
| 2f349aa0 | 2660 | DIE(aTHX_ "Undefined subroutine called"); |
| 7d2057d8 | 2661 | } |
| 2f349aa0 NC |
2662 | |
| 2663 | /* autoloaded stub? */ | |
| 2664 | if (cv != GvCV(gv)) { | |
| 2665 | cv = GvCV(gv); | |
| 2666 | } | |
| 2667 | /* should call AUTOLOAD now? */ | |
| 2668 | else { | |
| 7e623da3 | 2669 | try_autoload: |
| d1089224 BF |
2670 | if ((autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), |
| 2671 | GvNAMEUTF8(gv) ? SVf_UTF8 : 0))) | |
| 2f349aa0 NC |
2672 | { |
| 2673 | cv = GvCV(autogv); | |
| 2674 | } | |
| 2f349aa0 | 2675 | else { |
| c220e1a1 | 2676 | sorry: |
| 2f349aa0 | 2677 | sub_name = sv_newmortal(); |
| 6136c704 | 2678 | gv_efullname3(sub_name, gv, NULL); |
| be2597df | 2679 | DIE(aTHX_ "Undefined subroutine &%"SVf" called", SVfARG(sub_name)); |
| 2f349aa0 NC |
2680 | } |
| 2681 | } | |
| 2682 | if (!cv) | |
| c220e1a1 | 2683 | goto sorry; |
| 2f349aa0 | 2684 | goto retry; |
| a0d0e21e LW |
2685 | } |
| 2686 | ||
| 54310121 | 2687 | gimme = GIMME_V; |
| 67caa1fe | 2688 | if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) { |
| 005a8a35 | 2689 | Perl_get_db_sub(aTHX_ &sv, cv); |
| a9ef256d NC |
2690 | if (CvISXSUB(cv)) |
| 2691 | PL_curcopdb = PL_curcop; | |
| 1ad62f64 BR |
2692 | if (CvLVALUE(cv)) { |
| 2693 | /* check for lsub that handles lvalue subroutines */ | |
| ae5c1e95 | 2694 | cv = GvCV(gv_HVadd(gv_fetchpvs("DB::lsub", GV_ADDMULTI, SVt_PVHV))); |
| 1ad62f64 BR |
2695 | /* if lsub not found then fall back to DB::sub */ |
| 2696 | if (!cv) cv = GvCV(PL_DBsub); | |
| 2697 | } else { | |
| 2698 | cv = GvCV(PL_DBsub); | |
| 2699 | } | |
| a9ef256d | 2700 | |
| ccafdc96 RGS |
2701 | if (!cv || (!CvXSUB(cv) && !CvSTART(cv))) |
| 2702 | DIE(aTHX_ "No DB::sub routine defined"); | |
| 67caa1fe | 2703 | } |
| a0d0e21e | 2704 | |
| aed2304a | 2705 | if (!(CvISXSUB(cv))) { |
| f1025168 | 2706 | /* This path taken at least 75% of the time */ |
| a0d0e21e | 2707 | dMARK; |
| eb578fdb | 2708 | I32 items = SP - MARK; |
| b70d5558 | 2709 | PADLIST * const padlist = CvPADLIST(cv); |
| a0d0e21e LW |
2710 | PUSHBLOCK(cx, CXt_SUB, MARK); |
| 2711 | PUSHSUB(cx); | |
| f39bc417 | 2712 | cx->blk_sub.retop = PL_op->op_next; |
| a0d0e21e | 2713 | CvDEPTH(cv)++; |
| 3a76ca88 RGS |
2714 | if (CvDEPTH(cv) >= 2) { |
| 2715 | PERL_STACK_OVERFLOW_CHECK(); | |
| 2716 | pad_push(padlist, CvDEPTH(cv)); | |
| a0d0e21e | 2717 | } |
| 3a76ca88 RGS |
2718 | SAVECOMPPAD(); |
| 2719 | PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); | |
| 2720 | if (hasargs) { | |
| 10533ace | 2721 | AV *const av = MUTABLE_AV(PAD_SVl(0)); |
| 221373f0 GS |
2722 | if (AvREAL(av)) { |
| 2723 | /* @_ is normally not REAL--this should only ever | |
| 2724 | * happen when DB::sub() calls things that modify @_ */ | |
| 2725 | av_clear(av); | |
| 2726 | AvREAL_off(av); | |
| 2727 | AvREIFY_on(av); | |
| 2728 | } | |
| 3280af22 | 2729 | cx->blk_sub.savearray = GvAV(PL_defgv); |
| 502c6561 | 2730 | GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av)); |
| dd2155a4 | 2731 | CX_CURPAD_SAVE(cx->blk_sub); |
| 6d4ff0d2 | 2732 | cx->blk_sub.argarray = av; |
| a0d0e21e LW |
2733 | ++MARK; |
| 2734 | ||
| 2735 | if (items > AvMAX(av) + 1) { | |
| 504618e9 | 2736 | SV **ary = AvALLOC(av); |
| a0d0e21e LW |
2737 | if (AvARRAY(av) != ary) { |
| 2738 | AvMAX(av) += AvARRAY(av) - AvALLOC(av); | |
| 9c6bc640 | 2739 | AvARRAY(av) = ary; |
| a0d0e21e LW |
2740 | } |
| 2741 | if (items > AvMAX(av) + 1) { | |
| 2742 | AvMAX(av) = items - 1; | |
| 2743 | Renew(ary,items,SV*); | |
| 2744 | AvALLOC(av) = ary; | |
| 9c6bc640 | 2745 | AvARRAY(av) = ary; |
| a0d0e21e LW |
2746 | } |
| 2747 | } | |
| 2748 | Copy(MARK,AvARRAY(av),items,SV*); | |
| 93965878 | 2749 | AvFILLp(av) = items - 1; |
| 1c846c1f | 2750 | |
| a0d0e21e LW |
2751 | while (items--) { |
| 2752 | if (*MARK) | |
| 2753 | SvTEMP_off(*MARK); | |
| 2754 | MARK++; | |
| 2755 | } | |
| 2756 | } | |
| da1dff94 FC |
2757 | if ((cx->blk_u16 & OPpENTERSUB_LVAL_MASK) == OPpLVAL_INTRO && |
| 2758 | !CvLVALUE(cv)) | |
| 2759 | DIE(aTHX_ "Can't modify non-lvalue subroutine call"); | |
| 4a925ff6 GS |
2760 | /* warning must come *after* we fully set up the context |
| 2761 | * stuff so that __WARN__ handlers can safely dounwind() | |
| 2762 | * if they want to | |
| 2763 | */ | |
| 2b9dff67 | 2764 | if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION) |
| 4a925ff6 GS |
2765 | && !(PERLDB_SUB && cv == GvCV(PL_DBsub))) |
| 2766 | sub_crush_depth(cv); | |
| a0d0e21e LW |
2767 | RETURNOP(CvSTART(cv)); |
| 2768 | } | |
| f1025168 | 2769 | else { |
| 3a76ca88 | 2770 | I32 markix = TOPMARK; |
| f1025168 | 2771 | |
| 3a76ca88 | 2772 | PUTBACK; |
| f1025168 | 2773 | |
| 3a76ca88 RGS |
2774 | if (!hasargs) { |
| 2775 | /* Need to copy @_ to stack. Alternative may be to | |
| 2776 | * switch stack to @_, and copy return values | |
| 2777 | * back. This would allow popping @_ in XSUB, e.g.. XXXX */ | |
| 2778 | AV * const av = GvAV(PL_defgv); | |
| 2779 | const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */ | |
| 2780 | ||
| 2781 | if (items) { | |
| 2782 | /* Mark is at the end of the stack. */ | |
| 2783 | EXTEND(SP, items); | |
| 2784 | Copy(AvARRAY(av), SP + 1, items, SV*); | |
| 2785 | SP += items; | |
| 2786 | PUTBACK ; | |
| 2787 | } | |
| 2788 | } | |
| 2789 | /* We assume first XSUB in &DB::sub is the called one. */ | |
| 2790 | if (PL_curcopdb) { | |
| 2791 | SAVEVPTR(PL_curcop); | |
| 2792 | PL_curcop = PL_curcopdb; | |
| 2793 | PL_curcopdb = NULL; | |
| 2794 | } | |
| 2795 | /* Do we need to open block here? XXXX */ | |
| 72df79cf GF |
2796 | |
| 2797 | /* CvXSUB(cv) must not be NULL because newXS() refuses NULL xsub address */ | |
| 2798 | assert(CvXSUB(cv)); | |
| 16c91539 | 2799 | CvXSUB(cv)(aTHX_ cv); |
| 3a76ca88 RGS |
2800 | |
| 2801 | /* Enforce some sanity in scalar context. */ | |
| 2802 | if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) { | |
| 2803 | if (markix > PL_stack_sp - PL_stack_base) | |
| 2804 | *(PL_stack_base + markix) = &PL_sv_undef; | |
| 2805 | else | |
| 2806 | *(PL_stack_base + markix) = *PL_stack_sp; | |
| 2807 | PL_stack_sp = PL_stack_base + markix; | |
| 2808 | } | |
| a57c6685 | 2809 | LEAVE; |
| f1025168 NC |
2810 | return NORMAL; |
| 2811 | } | |
| a0d0e21e LW |
2812 | } |
| 2813 | ||
| 44a8e56a | 2814 | void |
| 864dbfa3 | 2815 | Perl_sub_crush_depth(pTHX_ CV *cv) |
| 44a8e56a | 2816 | { |
| 7918f24d NC |
2817 | PERL_ARGS_ASSERT_SUB_CRUSH_DEPTH; |
| 2818 | ||
| 44a8e56a | 2819 | if (CvANON(cv)) |
| 9014280d | 2820 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine"); |
| 44a8e56a | 2821 | else { |
| aec46f14 | 2822 | SV* const tmpstr = sv_newmortal(); |
| 6136c704 | 2823 | gv_efullname3(tmpstr, CvGV(cv), NULL); |
| 35c1215d | 2824 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"", |
| be2597df | 2825 | SVfARG(tmpstr)); |
| 44a8e56a | 2826 | } |
| 2827 | } | |
| 2828 | ||
| a0d0e21e LW |
2829 | PP(pp_aelem) |
| 2830 | { | |
| 97aff369 | 2831 | dVAR; dSP; |
| a0d0e21e | 2832 | SV** svp; |
| a3b680e6 | 2833 | SV* const elemsv = POPs; |
| d804643f | 2834 | IV elem = SvIV(elemsv); |
| 502c6561 | 2835 | AV *const av = MUTABLE_AV(POPs); |
| e1ec3a88 AL |
2836 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
| 2837 | const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av)); | |
| 4ad10a0b VP |
2838 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
| 2839 | bool preeminent = TRUE; | |
| be6c24e0 | 2840 | SV *sv; |
| a0d0e21e | 2841 | |
| e35c1634 | 2842 | if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC)) |
| 95b63a38 JH |
2843 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
| 2844 | "Use of reference \"%"SVf"\" as array index", | |
| be2597df | 2845 | SVfARG(elemsv)); |
| a0d0e21e LW |
2846 | if (SvTYPE(av) != SVt_PVAV) |
| 2847 | RETPUSHUNDEF; | |
| 4ad10a0b VP |
2848 | |
| 2849 | if (localizing) { | |
| 2850 | MAGIC *mg; | |
| 2851 | HV *stash; | |
| 2852 | ||
| 2853 | /* If we can determine whether the element exist, | |
| 2854 | * Try to preserve the existenceness of a tied array | |
| 2855 | * element by using EXISTS and DELETE if possible. | |
| 2856 | * Fallback to FETCH and STORE otherwise. */ | |
| 2857 | if (SvCANEXISTDELETE(av)) | |
| 2858 | preeminent = av_exists(av, elem); | |
| 2859 | } | |
| 2860 | ||
| 68dc0745 | 2861 | svp = av_fetch(av, elem, lval && !defer); |
| a0d0e21e | 2862 | if (lval) { |
| 2b573ace | 2863 | #ifdef PERL_MALLOC_WRAP |
| 2b573ace | 2864 | if (SvUOK(elemsv)) { |
| a9c4fd4e | 2865 | const UV uv = SvUV(elemsv); |
| 2b573ace JH |
2866 | elem = uv > IV_MAX ? IV_MAX : uv; |
| 2867 | } | |
| 2868 | else if (SvNOK(elemsv)) | |
| 2869 | elem = (IV)SvNV(elemsv); | |
| a3b680e6 AL |
2870 | if (elem > 0) { |
| 2871 | static const char oom_array_extend[] = | |
| 2872 | "Out of memory during array extend"; /* Duplicated in av.c */ | |
| 2b573ace | 2873 | MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend); |
| a3b680e6 | 2874 | } |
| 2b573ace | 2875 | #endif |
| 3280af22 | 2876 | if (!svp || *svp == &PL_sv_undef) { |
| 68dc0745 | 2877 | SV* lv; |
| 2878 | if (!defer) | |
| cea2e8a9 | 2879 | DIE(aTHX_ PL_no_aelem, elem); |
| 68dc0745 | 2880 | lv = sv_newmortal(); |
| 2881 | sv_upgrade(lv, SVt_PVLV); | |
| 2882 | LvTYPE(lv) = 'y'; | |
| a0714e2c | 2883 | sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0); |
| b37c2d43 | 2884 | LvTARG(lv) = SvREFCNT_inc_simple(av); |
| 68dc0745 | 2885 | LvTARGOFF(lv) = elem; |
| 2886 | LvTARGLEN(lv) = 1; | |
| 2887 | PUSHs(lv); | |
| 2888 | RETURN; | |
| 2889 | } | |
| 4ad10a0b VP |
2890 | if (localizing) { |
| 2891 | if (preeminent) | |
| 2892 | save_aelem(av, elem, svp); | |
| 2893 | else | |
| 2894 | SAVEADELETE(av, elem); | |
| 2895 | } | |
| 9026059d GG |
2896 | else if (PL_op->op_private & OPpDEREF) { |
| 2897 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
| 2898 | RETURN; | |
| 2899 | } | |
| a0d0e21e | 2900 | } |
| 3280af22 | 2901 | sv = (svp ? *svp : &PL_sv_undef); |
| 39cf747a | 2902 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
| fd69380d | 2903 | mg_get(sv); |
| be6c24e0 | 2904 | PUSHs(sv); |
| a0d0e21e LW |
2905 | RETURN; |
| 2906 | } | |
| 2907 | ||
| 9026059d | 2908 | SV* |
| 864dbfa3 | 2909 | Perl_vivify_ref(pTHX_ SV *sv, U32 to_what) |
| 02a9e968 | 2910 | { |
| 7918f24d NC |
2911 | PERL_ARGS_ASSERT_VIVIFY_REF; |
| 2912 | ||
| 5b295bef | 2913 | SvGETMAGIC(sv); |
| 02a9e968 CS |
2914 | if (!SvOK(sv)) { |
| 2915 | if (SvREADONLY(sv)) | |
| 6ad8f254 | 2916 | Perl_croak_no_modify(aTHX); |
| 43230e26 | 2917 | prepare_SV_for_RV(sv); |
| 68dc0745 | 2918 | switch (to_what) { |
| 5f05dabc | 2919 | case OPpDEREF_SV: |
| 561b68a9 | 2920 | SvRV_set(sv, newSV(0)); |
| 5f05dabc | 2921 | break; |
| 2922 | case OPpDEREF_AV: | |
| ad64d0ec | 2923 | SvRV_set(sv, MUTABLE_SV(newAV())); |
| 5f05dabc | 2924 | break; |
| 2925 | case OPpDEREF_HV: | |
| ad64d0ec | 2926 | SvRV_set(sv, MUTABLE_SV(newHV())); |
| 5f05dabc | 2927 | break; |
| 2928 | } | |
| 02a9e968 CS |
2929 | SvROK_on(sv); |
| 2930 | SvSETMAGIC(sv); | |
| 7e482323 | 2931 | SvGETMAGIC(sv); |
| 02a9e968 | 2932 | } |
| 9026059d GG |
2933 | if (SvGMAGICAL(sv)) { |
| 2934 | /* copy the sv without magic to prevent magic from being | |
| 2935 | executed twice */ | |
| 2936 | SV* msv = sv_newmortal(); | |
| 2937 | sv_setsv_nomg(msv, sv); | |
| 2938 | return msv; | |
| 2939 | } | |
| 2940 | return sv; | |
| 02a9e968 CS |
2941 | } |
| 2942 | ||
| a0d0e21e LW |
2943 | PP(pp_method) |
| 2944 | { | |
| 97aff369 | 2945 | dVAR; dSP; |
| 890ce7af | 2946 | SV* const sv = TOPs; |
| f5d5a27c CS |
2947 | |
| 2948 | if (SvROK(sv)) { | |
| 890ce7af | 2949 | SV* const rsv = SvRV(sv); |
| f5d5a27c CS |
2950 | if (SvTYPE(rsv) == SVt_PVCV) { |
| 2951 | SETs(rsv); | |
| 2952 | RETURN; | |
| 2953 | } | |
| 2954 | } | |
| 2955 | ||
| 4608196e | 2956 | SETs(method_common(sv, NULL)); |
| f5d5a27c CS |
2957 | RETURN; |
| 2958 | } | |
| 2959 | ||
| 2960 | PP(pp_method_named) | |
| 2961 | { | |
| 97aff369 | 2962 | dVAR; dSP; |
| 890ce7af | 2963 | SV* const sv = cSVOP_sv; |
| c158a4fd | 2964 | U32 hash = SvSHARED_HASH(sv); |
| f5d5a27c CS |
2965 | |
| 2966 | XPUSHs(method_common(sv, &hash)); | |
| 2967 | RETURN; | |
| 2968 | } | |
| 2969 | ||
| 2970 | STATIC SV * | |
| 2971 | S_method_common(pTHX_ SV* meth, U32* hashp) | |
| 2972 | { | |
| 97aff369 | 2973 | dVAR; |
| a0d0e21e LW |
2974 | SV* ob; |
| 2975 | GV* gv; | |
| 56304f61 | 2976 | HV* stash; |
| a0714e2c | 2977 | SV *packsv = NULL; |
| f226e9be FC |
2978 | SV * const sv = PL_stack_base + TOPMARK == PL_stack_sp |
| 2979 | ? (Perl_croak(aTHX_ "Can't call method \"%"SVf"\" without a " | |
| 2980 | "package or object reference", SVfARG(meth)), | |
| 2981 | (SV *)NULL) | |
| 2982 | : *(PL_stack_base + TOPMARK + 1); | |
| f5d5a27c | 2983 | |
| 7918f24d NC |
2984 | PERL_ARGS_ASSERT_METHOD_COMMON; |
| 2985 | ||
| 4f1b7578 | 2986 | if (!sv) |
| 7156e69a | 2987 | undefined: |
| a214957f VP |
2988 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" on an undefined value", |
| 2989 | SVfARG(meth)); | |
| 4f1b7578 | 2990 | |
| 5b295bef | 2991 | SvGETMAGIC(sv); |
| a0d0e21e | 2992 | if (SvROK(sv)) |
| ad64d0ec | 2993 | ob = MUTABLE_SV(SvRV(sv)); |
| 7156e69a | 2994 | else if (!SvOK(sv)) goto undefined; |
| a0d0e21e | 2995 | else { |
| 89269094 | 2996 | /* this isn't a reference */ |
| a0d0e21e | 2997 | GV* iogv; |
| f937af42 | 2998 | STRLEN packlen; |
| 89269094 | 2999 | const char * const packname = SvPV_nomg_const(sv, packlen); |
| b3ebc221 | 3000 | const bool packname_is_utf8 = !!SvUTF8(sv); |
| 89269094 | 3001 | const HE* const he = |
| b3ebc221 NC |
3002 | (const HE *)hv_common( |
| 3003 | PL_stashcache, NULL, packname, packlen, | |
| 3004 | packname_is_utf8 ? HVhek_UTF8 : 0, 0, NULL, 0 | |
| da6b625f FC |
3005 | ); |
| 3006 | ||
| 89269094 | 3007 | if (he) { |
| 5e6396ae | 3008 | stash = INT2PTR(HV*,SvIV(HeVAL(he))); |
| 103f5a36 NC |
3009 | DEBUG_o(Perl_deb(aTHX_ "PL_stashcache hit %p for '%"SVf"'\n", |
| 3010 | stash, sv)); | |
| 081fc587 | 3011 | goto fetch; |
| 081fc587 AB |
3012 | } |
| 3013 | ||
| 89269094 | 3014 | if (!(iogv = gv_fetchpvn_flags( |
| da6b625f FC |
3015 | packname, packlen, SVf_UTF8 * packname_is_utf8, SVt_PVIO |
| 3016 | )) || | |
| ad64d0ec | 3017 | !(ob=MUTABLE_SV(GvIO(iogv)))) |
| a0d0e21e | 3018 | { |
| af09ea45 | 3019 | /* this isn't the name of a filehandle either */ |
| 89269094 | 3020 | if (!packlen) |
| 834a4ddd | 3021 | { |
| 7156e69a FC |
3022 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" " |
| 3023 | "without a package or object reference", | |
| 3024 | SVfARG(meth)); | |
| 834a4ddd | 3025 | } |
| af09ea45 | 3026 | /* assume it's a package name */ |
| f937af42 | 3027 | stash = gv_stashpvn(packname, packlen, packname_is_utf8 ? SVf_UTF8 : 0); |
| 0dae17bd GS |
3028 | if (!stash) |
| 3029 | packsv = sv; | |
| 081fc587 | 3030 | else { |
| d4c19fe8 | 3031 | SV* const ref = newSViv(PTR2IV(stash)); |
| f937af42 | 3032 | (void)hv_store(PL_stashcache, packname, |
| c60dbbc3 | 3033 | packname_is_utf8 ? -(I32)packlen : (I32)packlen, ref, 0); |
| 103f5a36 NC |
3034 | DEBUG_o(Perl_deb(aTHX_ "PL_stashcache caching %p for '%"SVf"'\n", |
| 3035 | stash, sv)); | |
| 7e8961ec | 3036 | } |
| ac91690f | 3037 | goto fetch; |
| a0d0e21e | 3038 | } |
| af09ea45 | 3039 | /* it _is_ a filehandle name -- replace with a reference */ |
| ad64d0ec | 3040 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(MUTABLE_SV(iogv))); |
| a0d0e21e LW |
3041 | } |
| 3042 | ||
| af09ea45 | 3043 | /* if we got here, ob should be a reference or a glob */ |
| f0d43078 | 3044 | if (!ob || !(SvOBJECT(ob) |
| 6e592b3a BM |
3045 | || (SvTYPE(ob) == SVt_PVGV |
| 3046 | && isGV_with_GP(ob) | |
| 159b6efe | 3047 | && (ob = MUTABLE_SV(GvIO((const GV *)ob))) |
| f0d43078 GS |
3048 | && SvOBJECT(ob)))) |
| 3049 | { | |
| b375e37b BF |
3050 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" on unblessed reference", |
| 3051 | SVfARG((SvSCREAM(meth) && strEQ(SvPV_nolen_const(meth),"isa")) | |
| 3052 | ? newSVpvs_flags("DOES", SVs_TEMP) | |
| 3053 | : meth)); | |
| f0d43078 | 3054 | } |
| a0d0e21e | 3055 | |
| 56304f61 | 3056 | stash = SvSTASH(ob); |
| a0d0e21e | 3057 | |
| ac91690f | 3058 | fetch: |
| af09ea45 IK |
3059 | /* NOTE: stash may be null, hope hv_fetch_ent and |
| 3060 | gv_fetchmethod can cope (it seems they can) */ | |
| 3061 | ||
| f5d5a27c CS |
3062 | /* shortcut for simple names */ |
| 3063 | if (hashp) { | |
| b464bac0 | 3064 | const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp); |
| f5d5a27c | 3065 | if (he) { |
| 159b6efe | 3066 | gv = MUTABLE_GV(HeVAL(he)); |
| f5d5a27c | 3067 | if (isGV(gv) && GvCV(gv) && |
| e1a479c5 | 3068 | (!GvCVGEN(gv) || GvCVGEN(gv) |
| dd69841b | 3069 | == (PL_sub_generation + HvMROMETA(stash)->cache_gen))) |
| ad64d0ec | 3070 | return MUTABLE_SV(GvCV(gv)); |
| f5d5a27c CS |
3071 | } |
| 3072 | } | |
| 3073 | ||
| f937af42 BF |
3074 | gv = gv_fetchmethod_sv_flags(stash ? stash : MUTABLE_HV(packsv), |
| 3075 | meth, GV_AUTOLOAD | GV_CROAK); | |
| 9b9d0b15 | 3076 | |
| 256d1bb2 | 3077 | assert(gv); |
| 9b9d0b15 | 3078 | |
| ad64d0ec | 3079 | return isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv); |
| a0d0e21e | 3080 | } |
| 241d1a3b NC |
3081 | |
| 3082 | /* | |
| 3083 | * Local variables: | |
| 3084 | * c-indentation-style: bsd | |
| 3085 | * c-basic-offset: 4 | |
| 14d04a33 | 3086 | * indent-tabs-mode: nil |
| 241d1a3b NC |
3087 | * End: |
| 3088 | * | |
| 14d04a33 | 3089 | * ex: set ts=8 sts=4 sw=4 et: |
| 37442d52 | 3090 | */ |