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; |
4cc783ef DD |
88 | SV * const sv = TOPs; |
89 | SETs(TARG); | |
90 | sv_copypv(TARG, sv); | |
91 | SvSETMAGIC(TARG); | |
92 | /* no PUTBACK, SETs doesn't inc/dec SP */ | |
93 | return NORMAL; | |
a0d0e21e LW |
94 | } |
95 | ||
96 | PP(pp_gv) | |
97 | { | |
97aff369 | 98 | dVAR; dSP; |
ad64d0ec | 99 | XPUSHs(MUTABLE_SV(cGVOP_gv)); |
a0d0e21e LW |
100 | RETURN; |
101 | } | |
102 | ||
103 | PP(pp_and) | |
104 | { | |
4cc783ef | 105 | dVAR; |
f410a211 | 106 | PERL_ASYNC_CHECK(); |
4cc783ef DD |
107 | { |
108 | /* SP is not used to remove a variable that is saved across the | |
109 | sv_2bool_flags call in SvTRUE_NN, if a RISC/CISC or low/high machine | |
110 | register or load/store vs direct mem ops macro is introduced, this | |
111 | should be a define block between direct PL_stack_sp and dSP operations, | |
112 | presently, using PL_stack_sp is bias towards CISC cpus */ | |
113 | SV * const sv = *PL_stack_sp; | |
114 | if (!SvTRUE_NN(sv)) | |
115 | return NORMAL; | |
116 | else { | |
117 | if (PL_op->op_type == OP_AND) | |
118 | --PL_stack_sp; | |
119 | return cLOGOP->op_other; | |
120 | } | |
a0d0e21e LW |
121 | } |
122 | } | |
123 | ||
124 | PP(pp_sassign) | |
125 | { | |
3e75a3c4 RU |
126 | dVAR; dSP; |
127 | /* sassign keeps its args in the optree traditionally backwards. | |
128 | So we pop them differently. | |
129 | */ | |
130 | SV *left = POPs; SV *right = TOPs; | |
748a9306 | 131 | |
533c011a | 132 | if (PL_op->op_private & OPpASSIGN_BACKWARDS) { |
0bd48802 AL |
133 | SV * const temp = left; |
134 | left = right; right = temp; | |
a0d0e21e | 135 | } |
284167a5 | 136 | if (TAINTING_get && TAINT_get && !SvTAINTED(right)) |
a0d0e21e | 137 | TAINT_NOT; |
e26df76a | 138 | if (PL_op->op_private & OPpASSIGN_CV_TO_GV) { |
3e75a3c4 | 139 | SV * const cv = SvRV(right); |
e26df76a | 140 | const U32 cv_type = SvTYPE(cv); |
3e75a3c4 | 141 | const bool is_gv = isGV_with_GP(left); |
6136c704 | 142 | const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM; |
e26df76a NC |
143 | |
144 | if (!got_coderef) { | |
145 | assert(SvROK(cv)); | |
146 | } | |
147 | ||
3e75a3c4 RU |
148 | /* Can do the optimisation if left (LVALUE) is not a typeglob, |
149 | right (RVALUE) is a reference to something, and we're in void | |
e26df76a | 150 | context. */ |
13be902c | 151 | if (!got_coderef && !is_gv && GIMME_V == G_VOID) { |
e26df76a | 152 | /* Is the target symbol table currently empty? */ |
3e75a3c4 | 153 | GV * const gv = gv_fetchsv_nomg(left, GV_NOINIT, SVt_PVGV); |
bb112e5a | 154 | if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) { |
e26df76a NC |
155 | /* Good. Create a new proxy constant subroutine in the target. |
156 | The gv becomes a(nother) reference to the constant. */ | |
157 | SV *const value = SvRV(cv); | |
158 | ||
ad64d0ec | 159 | SvUPGRADE(MUTABLE_SV(gv), SVt_IV); |
1ccdb730 | 160 | SvPCS_IMPORTED_on(gv); |
e26df76a | 161 | SvRV_set(gv, value); |
b37c2d43 | 162 | SvREFCNT_inc_simple_void(value); |
3e75a3c4 | 163 | SETs(left); |
e26df76a NC |
164 | RETURN; |
165 | } | |
166 | } | |
167 | ||
168 | /* Need to fix things up. */ | |
13be902c | 169 | if (!is_gv) { |
e26df76a | 170 | /* Need to fix GV. */ |
3e75a3c4 | 171 | left = MUTABLE_SV(gv_fetchsv_nomg(left,GV_ADD, SVt_PVGV)); |
e26df76a NC |
172 | } |
173 | ||
174 | if (!got_coderef) { | |
175 | /* We've been returned a constant rather than a full subroutine, | |
176 | but they expect a subroutine reference to apply. */ | |
53a42478 | 177 | if (SvROK(cv)) { |
d343c3ef | 178 | ENTER_with_name("sassign_coderef"); |
53a42478 NC |
179 | SvREFCNT_inc_void(SvRV(cv)); |
180 | /* newCONSTSUB takes a reference count on the passed in SV | |
181 | from us. We set the name to NULL, otherwise we get into | |
182 | all sorts of fun as the reference to our new sub is | |
183 | donated to the GV that we're about to assign to. | |
184 | */ | |
3e75a3c4 | 185 | SvRV_set(right, MUTABLE_SV(newCONSTSUB(GvSTASH(left), NULL, |
ad64d0ec | 186 | SvRV(cv)))); |
53a42478 | 187 | SvREFCNT_dec(cv); |
d343c3ef | 188 | LEAVE_with_name("sassign_coderef"); |
53a42478 NC |
189 | } else { |
190 | /* What can happen for the corner case *{"BONK"} = \&{"BONK"}; | |
191 | is that | |
192 | First: ops for \&{"BONK"}; return us the constant in the | |
193 | symbol table | |
194 | Second: ops for *{"BONK"} cause that symbol table entry | |
195 | (and our reference to it) to be upgraded from RV | |
196 | to typeblob) | |
197 | Thirdly: We get here. cv is actually PVGV now, and its | |
198 | GvCV() is actually the subroutine we're looking for | |
199 | ||
200 | So change the reference so that it points to the subroutine | |
201 | of that typeglob, as that's what they were after all along. | |
202 | */ | |
159b6efe | 203 | GV *const upgraded = MUTABLE_GV(cv); |
53a42478 NC |
204 | CV *const source = GvCV(upgraded); |
205 | ||
206 | assert(source); | |
207 | assert(CvFLAGS(source) & CVf_CONST); | |
208 | ||
209 | SvREFCNT_inc_void(source); | |
210 | SvREFCNT_dec(upgraded); | |
3e75a3c4 | 211 | SvRV_set(right, MUTABLE_SV(source)); |
53a42478 | 212 | } |
e26df76a | 213 | } |
53a42478 | 214 | |
e26df76a | 215 | } |
8fe85e3f | 216 | if ( |
3e75a3c4 RU |
217 | SvTEMP(left) && !SvSMAGICAL(left) && SvREFCNT(left) == 1 && |
218 | (!isGV_with_GP(left) || SvFAKE(left)) && ckWARN(WARN_MISC) | |
8fe85e3f FC |
219 | ) |
220 | Perl_warner(aTHX_ | |
221 | packWARN(WARN_MISC), "Useless assignment to a temporary" | |
222 | ); | |
3e75a3c4 RU |
223 | SvSetMagicSV(left, right); |
224 | SETs(left); | |
a0d0e21e LW |
225 | RETURN; |
226 | } | |
227 | ||
228 | PP(pp_cond_expr) | |
229 | { | |
97aff369 | 230 | dVAR; dSP; |
f410a211 | 231 | PERL_ASYNC_CHECK(); |
a0d0e21e | 232 | if (SvTRUEx(POPs)) |
1a67a97c | 233 | RETURNOP(cLOGOP->op_other); |
a0d0e21e | 234 | else |
1a67a97c | 235 | RETURNOP(cLOGOP->op_next); |
a0d0e21e LW |
236 | } |
237 | ||
238 | PP(pp_unstack) | |
239 | { | |
97aff369 | 240 | dVAR; |
8f3964af | 241 | PERL_ASYNC_CHECK(); |
a0d0e21e | 242 | TAINT_NOT; /* Each statement is presumed innocent */ |
3280af22 | 243 | PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp; |
a0d0e21e | 244 | FREETMPS; |
eae48c89 Z |
245 | if (!(PL_op->op_flags & OPf_SPECIAL)) { |
246 | I32 oldsave = PL_scopestack[PL_scopestack_ix - 1]; | |
247 | LEAVE_SCOPE(oldsave); | |
248 | } | |
a0d0e21e LW |
249 | return NORMAL; |
250 | } | |
251 | ||
a0d0e21e LW |
252 | PP(pp_concat) |
253 | { | |
6f1401dc | 254 | dVAR; dSP; dATARGET; tryAMAGICbin_MG(concat_amg, AMGf_assign); |
748a9306 LW |
255 | { |
256 | dPOPTOPssrl; | |
8d6d96c1 HS |
257 | bool lbyte; |
258 | STRLEN rlen; | |
d4c19fe8 | 259 | const char *rpv = NULL; |
a6b599c7 | 260 | bool rbyte = FALSE; |
a9c4fd4e | 261 | bool rcopied = FALSE; |
8d6d96c1 | 262 | |
6f1401dc DM |
263 | if (TARG == right && right != left) { /* $r = $l.$r */ |
264 | rpv = SvPV_nomg_const(right, rlen); | |
c75ab21a | 265 | rbyte = !DO_UTF8(right); |
59cd0e26 | 266 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
349d4f2f | 267 | rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */ |
db79b45b | 268 | rcopied = TRUE; |
8d6d96c1 | 269 | } |
7889fe52 | 270 | |
89734059 | 271 | if (TARG != left) { /* not $l .= $r */ |
a9c4fd4e | 272 | STRLEN llen; |
6f1401dc | 273 | const char* const lpv = SvPV_nomg_const(left, llen); |
90f5826e | 274 | lbyte = !DO_UTF8(left); |
8d6d96c1 HS |
275 | sv_setpvn(TARG, lpv, llen); |
276 | if (!lbyte) | |
277 | SvUTF8_on(TARG); | |
278 | else | |
279 | SvUTF8_off(TARG); | |
280 | } | |
89734059 | 281 | else { /* $l .= $r */ |
c75ab21a | 282 | if (!SvOK(TARG)) { |
89734059 | 283 | if (left == right && ckWARN(WARN_UNINITIALIZED)) /* $l .= $l */ |
c75ab21a | 284 | report_uninit(right); |
76f68e9b | 285 | sv_setpvs(left, ""); |
c75ab21a | 286 | } |
583a5589 FC |
287 | SvPV_force_nomg_nolen(left); |
288 | lbyte = !DO_UTF8(left); | |
90f5826e TS |
289 | if (IN_BYTES) |
290 | SvUTF8_off(TARG); | |
8d6d96c1 | 291 | } |
a12c0f56 | 292 | |
c75ab21a | 293 | if (!rcopied) { |
6f1401dc | 294 | if (left == right) |
89734059 | 295 | /* $r.$r: do magic twice: tied might return different 2nd time */ |
6f1401dc DM |
296 | SvGETMAGIC(right); |
297 | rpv = SvPV_nomg_const(right, rlen); | |
c75ab21a RH |
298 | rbyte = !DO_UTF8(right); |
299 | } | |
8d6d96c1 | 300 | if (lbyte != rbyte) { |
e3393f51 NT |
301 | /* sv_utf8_upgrade_nomg() may reallocate the stack */ |
302 | PUTBACK; | |
8d6d96c1 HS |
303 | if (lbyte) |
304 | sv_utf8_upgrade_nomg(TARG); | |
305 | else { | |
db79b45b | 306 | if (!rcopied) |
59cd0e26 | 307 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
8d6d96c1 | 308 | sv_utf8_upgrade_nomg(right); |
6f1401dc | 309 | rpv = SvPV_nomg_const(right, rlen); |
69b47968 | 310 | } |
e3393f51 | 311 | SPAGAIN; |
a0d0e21e | 312 | } |
8d6d96c1 | 313 | sv_catpvn_nomg(TARG, rpv, rlen); |
43ebc500 | 314 | |
a0d0e21e LW |
315 | SETTARG; |
316 | RETURN; | |
748a9306 | 317 | } |
a0d0e21e LW |
318 | } |
319 | ||
d5524600 DM |
320 | /* push the elements of av onto the stack. |
321 | * XXX Note that padav has similar code but without the mg_get(). | |
322 | * I suspect that the mg_get is no longer needed, but while padav | |
323 | * differs, it can't share this function */ | |
324 | ||
325 | void | |
326 | S_pushav(pTHX_ AV* const av) | |
327 | { | |
328 | dSP; | |
329 | const I32 maxarg = AvFILL(av) + 1; | |
330 | EXTEND(SP, maxarg); | |
331 | if (SvRMAGICAL(av)) { | |
332 | U32 i; | |
333 | for (i=0; i < (U32)maxarg; i++) { | |
334 | SV ** const svp = av_fetch(av, i, FALSE); | |
335 | /* See note in pp_helem, and bug id #27839 */ | |
336 | SP[i+1] = svp | |
337 | ? SvGMAGICAL(*svp) ? (mg_get(*svp), *svp) : *svp | |
338 | : &PL_sv_undef; | |
339 | } | |
340 | } | |
341 | else { | |
342 | Copy(AvARRAY(av), SP+1, maxarg, SV*); | |
343 | } | |
344 | SP += maxarg; | |
345 | PUTBACK; | |
346 | } | |
347 | ||
348 | ||
a7fd8ef6 DM |
349 | /* ($lex1,@lex2,...) or my ($lex1,@lex2,...) */ |
350 | ||
351 | PP(pp_padrange) | |
352 | { | |
353 | dVAR; dSP; | |
354 | PADOFFSET base = PL_op->op_targ; | |
355 | int count = (int)(PL_op->op_private) & OPpPADRANGE_COUNTMASK; | |
356 | int i; | |
d5524600 DM |
357 | if (PL_op->op_flags & OPf_SPECIAL) { |
358 | /* fake the RHS of my ($x,$y,..) = @_ */ | |
359 | PUSHMARK(SP); | |
360 | S_pushav(aTHX_ GvAVn(PL_defgv)); | |
361 | SPAGAIN; | |
362 | } | |
363 | ||
a7fd8ef6 DM |
364 | /* note, this is only skipped for compile-time-known void cxt */ |
365 | if ((PL_op->op_flags & OPf_WANT) != OPf_WANT_VOID) { | |
366 | EXTEND(SP, count); | |
367 | PUSHMARK(SP); | |
368 | for (i = 0; i <count; i++) | |
369 | *++SP = PAD_SV(base+i); | |
370 | } | |
371 | if (PL_op->op_private & OPpLVAL_INTRO) { | |
4e09461c DM |
372 | SV **svp = &(PAD_SVl(base)); |
373 | const UV payload = (UV)( | |
374 | (base << (OPpPADRANGE_COUNTSHIFT + SAVE_TIGHT_SHIFT)) | |
375 | | (count << SAVE_TIGHT_SHIFT) | |
376 | | SAVEt_CLEARPADRANGE); | |
377 | assert(OPpPADRANGE_COUNTMASK + 1 == (1 <<OPpPADRANGE_COUNTSHIFT)); | |
378 | assert((payload >> (OPpPADRANGE_COUNTSHIFT+SAVE_TIGHT_SHIFT)) == base); | |
379 | SSCHECK(1); | |
380 | SSPUSHUV(payload); | |
381 | ||
a7fd8ef6 | 382 | for (i = 0; i <count; i++) |
4e09461c | 383 | SvPADSTALE_off(*svp++); /* mark lexical as active */ |
a7fd8ef6 DM |
384 | } |
385 | RETURN; | |
386 | } | |
387 | ||
388 | ||
a0d0e21e LW |
389 | PP(pp_padsv) |
390 | { | |
6c28b496 DD |
391 | dVAR; dSP; |
392 | EXTEND(SP, 1); | |
393 | { | |
394 | OP * const op = PL_op; | |
395 | /* access PL_curpad once */ | |
396 | SV ** const padentry = &(PAD_SVl(op->op_targ)); | |
397 | { | |
398 | dTARG; | |
399 | TARG = *padentry; | |
400 | PUSHs(TARG); | |
401 | PUTBACK; /* no pop/push after this, TOPs ok */ | |
8ec5e241 | 402 | } |
6c28b496 DD |
403 | if (op->op_flags & OPf_MOD) { |
404 | if (op->op_private & OPpLVAL_INTRO) | |
405 | if (!(op->op_private & OPpPAD_STATE)) | |
406 | save_clearsv(padentry); | |
407 | if (op->op_private & OPpDEREF) { | |
8f90a16d FC |
408 | /* TOPs is equivalent to TARG here. Using TOPs (SP) rather |
409 | than TARG reduces the scope of TARG, so it does not | |
410 | span the call to save_clearsv, resulting in smaller | |
411 | machine code. */ | |
6c28b496 DD |
412 | TOPs = vivify_ref(TOPs, op->op_private & OPpDEREF); |
413 | } | |
414 | } | |
415 | return op->op_next; | |
4633a7c4 | 416 | } |
a0d0e21e LW |
417 | } |
418 | ||
419 | PP(pp_readline) | |
420 | { | |
97aff369 | 421 | dVAR; |
30901a8a FC |
422 | dSP; |
423 | if (TOPs) { | |
424 | SvGETMAGIC(TOPs); | |
67288365 | 425 | tryAMAGICunTARGETlist(iter_amg, 0, 0); |
30901a8a FC |
426 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
427 | } | |
428 | else PL_last_in_gv = PL_argvgv, PL_stack_sp--; | |
6e592b3a BM |
429 | if (!isGV_with_GP(PL_last_in_gv)) { |
430 | if (SvROK(PL_last_in_gv) && isGV_with_GP(SvRV(PL_last_in_gv))) | |
159b6efe | 431 | PL_last_in_gv = MUTABLE_GV(SvRV(PL_last_in_gv)); |
8efb3254 | 432 | else { |
f5284f61 | 433 | dSP; |
ad64d0ec | 434 | XPUSHs(MUTABLE_SV(PL_last_in_gv)); |
f5284f61 | 435 | PUTBACK; |
897d3989 | 436 | Perl_pp_rv2gv(aTHX); |
159b6efe | 437 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
f5284f61 IZ |
438 | } |
439 | } | |
a0d0e21e LW |
440 | return do_readline(); |
441 | } | |
442 | ||
443 | PP(pp_eq) | |
444 | { | |
6f1401dc | 445 | dVAR; dSP; |
33efebe6 DM |
446 | SV *left, *right; |
447 | ||
a42d0242 | 448 | tryAMAGICbin_MG(eq_amg, AMGf_set|AMGf_numeric); |
33efebe6 DM |
449 | right = POPs; |
450 | left = TOPs; | |
451 | SETs(boolSV( | |
452 | (SvIOK_notUV(left) && SvIOK_notUV(right)) | |
453 | ? (SvIVX(left) == SvIVX(right)) | |
454 | : ( do_ncmp(left, right) == 0) | |
455 | )); | |
456 | RETURN; | |
a0d0e21e LW |
457 | } |
458 | ||
459 | PP(pp_preinc) | |
460 | { | |
97aff369 | 461 | dVAR; dSP; |
17058fe0 FC |
462 | const bool inc = |
463 | PL_op->op_type == OP_PREINC || PL_op->op_type == OP_I_PREINC; | |
60092ce4 | 464 | if (SvTYPE(TOPs) >= SVt_PVAV || (isGV_with_GP(TOPs) && !SvFAKE(TOPs))) |
cb077ed2 | 465 | Perl_croak_no_modify(); |
4bac9ae4 | 466 | if (!SvREADONLY(TOPs) && !SvGMAGICAL(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) |
17058fe0 | 467 | && SvIVX(TOPs) != (inc ? IV_MAX : IV_MIN)) |
55497cff | 468 | { |
17058fe0 | 469 | SvIV_set(TOPs, SvIVX(TOPs) + (inc ? 1 : -1)); |
55497cff | 470 | SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK); |
748a9306 | 471 | } |
28e5dec8 | 472 | else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */ |
17058fe0 FC |
473 | if (inc) sv_inc(TOPs); |
474 | else sv_dec(TOPs); | |
a0d0e21e LW |
475 | SvSETMAGIC(TOPs); |
476 | return NORMAL; | |
477 | } | |
478 | ||
479 | PP(pp_or) | |
480 | { | |
97aff369 | 481 | dVAR; dSP; |
f410a211 | 482 | PERL_ASYNC_CHECK(); |
a0d0e21e LW |
483 | if (SvTRUE(TOPs)) |
484 | RETURN; | |
485 | else { | |
c960fc3b SP |
486 | if (PL_op->op_type == OP_OR) |
487 | --SP; | |
a0d0e21e LW |
488 | RETURNOP(cLOGOP->op_other); |
489 | } | |
490 | } | |
491 | ||
25a55bd7 | 492 | PP(pp_defined) |
c963b151 | 493 | { |
97aff369 | 494 | dVAR; dSP; |
eb578fdb | 495 | SV* sv; |
6136c704 | 496 | bool defined; |
25a55bd7 | 497 | const int op_type = PL_op->op_type; |
ea5195b7 | 498 | const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN); |
c963b151 | 499 | |
6136c704 | 500 | if (is_dor) { |
f410a211 | 501 | PERL_ASYNC_CHECK(); |
25a55bd7 SP |
502 | sv = TOPs; |
503 | if (!sv || !SvANY(sv)) { | |
2bd49cfc NC |
504 | if (op_type == OP_DOR) |
505 | --SP; | |
25a55bd7 SP |
506 | RETURNOP(cLOGOP->op_other); |
507 | } | |
b7c44293 RGS |
508 | } |
509 | else { | |
510 | /* OP_DEFINED */ | |
25a55bd7 SP |
511 | sv = POPs; |
512 | if (!sv || !SvANY(sv)) | |
513 | RETPUSHNO; | |
b7c44293 | 514 | } |
25a55bd7 | 515 | |
6136c704 | 516 | defined = FALSE; |
c963b151 BD |
517 | switch (SvTYPE(sv)) { |
518 | case SVt_PVAV: | |
519 | if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
25a55bd7 | 520 | defined = TRUE; |
c963b151 BD |
521 | break; |
522 | case SVt_PVHV: | |
523 | if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
25a55bd7 | 524 | defined = TRUE; |
c963b151 BD |
525 | break; |
526 | case SVt_PVCV: | |
527 | if (CvROOT(sv) || CvXSUB(sv)) | |
25a55bd7 | 528 | defined = TRUE; |
c963b151 BD |
529 | break; |
530 | default: | |
5b295bef | 531 | SvGETMAGIC(sv); |
c963b151 | 532 | if (SvOK(sv)) |
25a55bd7 | 533 | defined = TRUE; |
6136c704 | 534 | break; |
c963b151 | 535 | } |
6136c704 AL |
536 | |
537 | if (is_dor) { | |
c960fc3b SP |
538 | if(defined) |
539 | RETURN; | |
540 | if(op_type == OP_DOR) | |
541 | --SP; | |
25a55bd7 | 542 | RETURNOP(cLOGOP->op_other); |
25a55bd7 | 543 | } |
d9aa96a4 SP |
544 | /* assuming OP_DEFINED */ |
545 | if(defined) | |
546 | RETPUSHYES; | |
547 | RETPUSHNO; | |
c963b151 BD |
548 | } |
549 | ||
a0d0e21e LW |
550 | PP(pp_add) |
551 | { | |
800401ee | 552 | dVAR; dSP; dATARGET; bool useleft; SV *svl, *svr; |
6f1401dc DM |
553 | tryAMAGICbin_MG(add_amg, AMGf_assign|AMGf_numeric); |
554 | svr = TOPs; | |
555 | svl = TOPm1s; | |
556 | ||
800401ee | 557 | useleft = USE_LEFT(svl); |
28e5dec8 JH |
558 | #ifdef PERL_PRESERVE_IVUV |
559 | /* We must see if we can perform the addition with integers if possible, | |
560 | as the integer code detects overflow while the NV code doesn't. | |
561 | If either argument hasn't had a numeric conversion yet attempt to get | |
562 | the IV. It's important to do this now, rather than just assuming that | |
563 | it's not IOK as a PV of "9223372036854775806" may not take well to NV | |
564 | addition, and an SV which is NOK, NV=6.0 ought to be coerced to | |
565 | integer in case the second argument is IV=9223372036854775806 | |
566 | We can (now) rely on sv_2iv to do the right thing, only setting the | |
567 | public IOK flag if the value in the NV (or PV) slot is truly integer. | |
568 | ||
569 | A side effect is that this also aggressively prefers integer maths over | |
7dca457a NC |
570 | fp maths for integer values. |
571 | ||
a00b5bd3 | 572 | How to detect overflow? |
7dca457a NC |
573 | |
574 | C 99 section 6.2.6.1 says | |
575 | ||
576 | The range of nonnegative values of a signed integer type is a subrange | |
577 | of the corresponding unsigned integer type, and the representation of | |
578 | the same value in each type is the same. A computation involving | |
579 | unsigned operands can never overflow, because a result that cannot be | |
580 | represented by the resulting unsigned integer type is reduced modulo | |
581 | the number that is one greater than the largest value that can be | |
582 | represented by the resulting type. | |
583 | ||
584 | (the 9th paragraph) | |
585 | ||
586 | which I read as "unsigned ints wrap." | |
587 | ||
588 | signed integer overflow seems to be classed as "exception condition" | |
589 | ||
590 | If an exceptional condition occurs during the evaluation of an | |
591 | expression (that is, if the result is not mathematically defined or not | |
592 | in the range of representable values for its type), the behavior is | |
593 | undefined. | |
594 | ||
595 | (6.5, the 5th paragraph) | |
596 | ||
597 | I had assumed that on 2s complement machines signed arithmetic would | |
598 | wrap, hence coded pp_add and pp_subtract on the assumption that | |
599 | everything perl builds on would be happy. After much wailing and | |
600 | gnashing of teeth it would seem that irix64 knows its ANSI spec well, | |
601 | knows that it doesn't need to, and doesn't. Bah. Anyway, the all- | |
602 | unsigned code below is actually shorter than the old code. :-) | |
603 | */ | |
604 | ||
01f91bf2 | 605 | if (SvIV_please_nomg(svr)) { |
28e5dec8 JH |
606 | /* Unless the left argument is integer in range we are going to have to |
607 | use NV maths. Hence only attempt to coerce the right argument if | |
608 | we know the left is integer. */ | |
eb578fdb | 609 | UV auv = 0; |
9c5ffd7c | 610 | bool auvok = FALSE; |
7dca457a NC |
611 | bool a_valid = 0; |
612 | ||
28e5dec8 | 613 | if (!useleft) { |
7dca457a NC |
614 | auv = 0; |
615 | a_valid = auvok = 1; | |
616 | /* left operand is undef, treat as zero. + 0 is identity, | |
617 | Could SETi or SETu right now, but space optimise by not adding | |
618 | lots of code to speed up what is probably a rarish case. */ | |
619 | } else { | |
620 | /* Left operand is defined, so is it IV? */ | |
01f91bf2 | 621 | if (SvIV_please_nomg(svl)) { |
800401ee JH |
622 | if ((auvok = SvUOK(svl))) |
623 | auv = SvUVX(svl); | |
7dca457a | 624 | else { |
eb578fdb | 625 | const IV aiv = SvIVX(svl); |
7dca457a NC |
626 | if (aiv >= 0) { |
627 | auv = aiv; | |
628 | auvok = 1; /* Now acting as a sign flag. */ | |
629 | } else { /* 2s complement assumption for IV_MIN */ | |
630 | auv = (UV)-aiv; | |
631 | } | |
632 | } | |
633 | a_valid = 1; | |
28e5dec8 JH |
634 | } |
635 | } | |
7dca457a NC |
636 | if (a_valid) { |
637 | bool result_good = 0; | |
638 | UV result; | |
eb578fdb | 639 | UV buv; |
800401ee | 640 | bool buvok = SvUOK(svr); |
a00b5bd3 | 641 | |
7dca457a | 642 | if (buvok) |
800401ee | 643 | buv = SvUVX(svr); |
7dca457a | 644 | else { |
eb578fdb | 645 | const IV biv = SvIVX(svr); |
7dca457a NC |
646 | if (biv >= 0) { |
647 | buv = biv; | |
648 | buvok = 1; | |
649 | } else | |
650 | buv = (UV)-biv; | |
651 | } | |
652 | /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve, | |
602f51c4 | 653 | else "IV" now, independent of how it came in. |
7dca457a NC |
654 | if a, b represents positive, A, B negative, a maps to -A etc |
655 | a + b => (a + b) | |
656 | A + b => -(a - b) | |
657 | a + B => (a - b) | |
658 | A + B => -(a + b) | |
659 | all UV maths. negate result if A negative. | |
660 | add if signs same, subtract if signs differ. */ | |
661 | ||
662 | if (auvok ^ buvok) { | |
663 | /* Signs differ. */ | |
664 | if (auv >= buv) { | |
665 | result = auv - buv; | |
666 | /* Must get smaller */ | |
667 | if (result <= auv) | |
668 | result_good = 1; | |
669 | } else { | |
670 | result = buv - auv; | |
671 | if (result <= buv) { | |
672 | /* result really should be -(auv-buv). as its negation | |
673 | of true value, need to swap our result flag */ | |
674 | auvok = !auvok; | |
675 | result_good = 1; | |
28e5dec8 JH |
676 | } |
677 | } | |
7dca457a NC |
678 | } else { |
679 | /* Signs same */ | |
680 | result = auv + buv; | |
681 | if (result >= auv) | |
682 | result_good = 1; | |
683 | } | |
684 | if (result_good) { | |
685 | SP--; | |
686 | if (auvok) | |
28e5dec8 | 687 | SETu( result ); |
7dca457a NC |
688 | else { |
689 | /* Negate result */ | |
690 | if (result <= (UV)IV_MIN) | |
691 | SETi( -(IV)result ); | |
692 | else { | |
693 | /* result valid, but out of range for IV. */ | |
694 | SETn( -(NV)result ); | |
28e5dec8 JH |
695 | } |
696 | } | |
7dca457a NC |
697 | RETURN; |
698 | } /* Overflow, drop through to NVs. */ | |
28e5dec8 JH |
699 | } |
700 | } | |
701 | #endif | |
a0d0e21e | 702 | { |
6f1401dc | 703 | NV value = SvNV_nomg(svr); |
4efa5a16 | 704 | (void)POPs; |
28e5dec8 JH |
705 | if (!useleft) { |
706 | /* left operand is undef, treat as zero. + 0.0 is identity. */ | |
707 | SETn(value); | |
708 | RETURN; | |
709 | } | |
6f1401dc | 710 | SETn( value + SvNV_nomg(svl) ); |
28e5dec8 | 711 | RETURN; |
a0d0e21e LW |
712 | } |
713 | } | |
714 | ||
715 | PP(pp_aelemfast) | |
716 | { | |
97aff369 | 717 | dVAR; dSP; |
93bad3fd | 718 | AV * const av = PL_op->op_type == OP_AELEMFAST_LEX |
8f878375 | 719 | ? MUTABLE_AV(PAD_SV(PL_op->op_targ)) : GvAVn(cGVOP_gv); |
a3b680e6 | 720 | const U32 lval = PL_op->op_flags & OPf_MOD; |
0bd48802 | 721 | SV** const svp = av_fetch(av, PL_op->op_private, lval); |
3280af22 | 722 | SV *sv = (svp ? *svp : &PL_sv_undef); |
6ff81951 | 723 | EXTEND(SP, 1); |
39cf747a | 724 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
fd69380d | 725 | mg_get(sv); |
be6c24e0 | 726 | PUSHs(sv); |
a0d0e21e LW |
727 | RETURN; |
728 | } | |
729 | ||
730 | PP(pp_join) | |
731 | { | |
97aff369 | 732 | dVAR; dSP; dMARK; dTARGET; |
a0d0e21e LW |
733 | MARK++; |
734 | do_join(TARG, *MARK, MARK, SP); | |
735 | SP = MARK; | |
736 | SETs(TARG); | |
737 | RETURN; | |
738 | } | |
739 | ||
740 | PP(pp_pushre) | |
741 | { | |
97aff369 | 742 | dVAR; dSP; |
44a8e56a | 743 | #ifdef DEBUGGING |
744 | /* | |
745 | * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs | |
746 | * will be enough to hold an OP*. | |
747 | */ | |
c4420975 | 748 | SV* const sv = sv_newmortal(); |
44a8e56a | 749 | sv_upgrade(sv, SVt_PVLV); |
750 | LvTYPE(sv) = '/'; | |
533c011a | 751 | Copy(&PL_op, &LvTARGOFF(sv), 1, OP*); |
44a8e56a | 752 | XPUSHs(sv); |
753 | #else | |
ad64d0ec | 754 | XPUSHs(MUTABLE_SV(PL_op)); |
44a8e56a | 755 | #endif |
a0d0e21e LW |
756 | RETURN; |
757 | } | |
758 | ||
759 | /* Oversized hot code. */ | |
760 | ||
761 | PP(pp_print) | |
762 | { | |
27da23d5 | 763 | dVAR; dSP; dMARK; dORIGMARK; |
eb578fdb | 764 | PerlIO *fp; |
236988e4 | 765 | MAGIC *mg; |
159b6efe NC |
766 | GV * const gv |
767 | = (PL_op->op_flags & OPf_STACKED) ? MUTABLE_GV(*++MARK) : PL_defoutgv; | |
9c9f25b8 | 768 | IO *io = GvIO(gv); |
5b468f54 | 769 | |
9c9f25b8 | 770 | if (io |
ad64d0ec | 771 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
5b468f54 | 772 | { |
01bb7c6d | 773 | had_magic: |
68dc0745 | 774 | if (MARK == ORIGMARK) { |
1c846c1f | 775 | /* If using default handle then we need to make space to |
a60c0954 NIS |
776 | * pass object as 1st arg, so move other args up ... |
777 | */ | |
4352c267 | 778 | MEXTEND(SP, 1); |
68dc0745 | 779 | ++MARK; |
780 | Move(MARK, MARK + 1, (SP - MARK) + 1, SV*); | |
781 | ++SP; | |
782 | } | |
94bc412f NC |
783 | return Perl_tied_method(aTHX_ "PRINT", mark - 1, MUTABLE_SV(io), |
784 | mg, | |
785 | (G_SCALAR | TIED_METHOD_ARGUMENTS_ON_STACK | |
786 | | (PL_op->op_type == OP_SAY | |
787 | ? TIED_METHOD_SAY : 0)), sp - mark); | |
236988e4 | 788 | } |
9c9f25b8 | 789 | if (!io) { |
68b590d9 | 790 | if ( gv && GvEGVx(gv) && (io = GvIO(GvEGV(gv))) |
ad64d0ec | 791 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
01bb7c6d | 792 | goto had_magic; |
51087808 | 793 | report_evil_fh(gv); |
93189314 | 794 | SETERRNO(EBADF,RMS_IFI); |
a0d0e21e LW |
795 | goto just_say_no; |
796 | } | |
797 | else if (!(fp = IoOFP(io))) { | |
7716c5c5 NC |
798 | if (IoIFP(io)) |
799 | report_wrongway_fh(gv, '<'); | |
51087808 | 800 | else |
7716c5c5 | 801 | report_evil_fh(gv); |
93189314 | 802 | SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI); |
a0d0e21e LW |
803 | goto just_say_no; |
804 | } | |
805 | else { | |
e23d9e2f | 806 | SV * const ofs = GvSV(PL_ofsgv); /* $, */ |
a0d0e21e | 807 | MARK++; |
e23d9e2f | 808 | if (ofs && (SvGMAGICAL(ofs) || SvOK(ofs))) { |
a0d0e21e LW |
809 | while (MARK <= SP) { |
810 | if (!do_print(*MARK, fp)) | |
811 | break; | |
812 | MARK++; | |
813 | if (MARK <= SP) { | |
e23d9e2f CS |
814 | /* don't use 'ofs' here - it may be invalidated by magic callbacks */ |
815 | if (!do_print(GvSV(PL_ofsgv), fp)) { | |
a0d0e21e LW |
816 | MARK--; |
817 | break; | |
818 | } | |
819 | } | |
820 | } | |
821 | } | |
822 | else { | |
823 | while (MARK <= SP) { | |
824 | if (!do_print(*MARK, fp)) | |
825 | break; | |
826 | MARK++; | |
827 | } | |
828 | } | |
829 | if (MARK <= SP) | |
830 | goto just_say_no; | |
831 | else { | |
cfc4a7da GA |
832 | if (PL_op->op_type == OP_SAY) { |
833 | if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp)) | |
834 | goto just_say_no; | |
835 | } | |
836 | else if (PL_ors_sv && SvOK(PL_ors_sv)) | |
7889fe52 | 837 | if (!do_print(PL_ors_sv, fp)) /* $\ */ |
a0d0e21e LW |
838 | goto just_say_no; |
839 | ||
840 | if (IoFLAGS(io) & IOf_FLUSH) | |
760ac839 | 841 | if (PerlIO_flush(fp) == EOF) |
a0d0e21e LW |
842 | goto just_say_no; |
843 | } | |
844 | } | |
845 | SP = ORIGMARK; | |
e52fd6f4 | 846 | XPUSHs(&PL_sv_yes); |
a0d0e21e LW |
847 | RETURN; |
848 | ||
849 | just_say_no: | |
850 | SP = ORIGMARK; | |
e52fd6f4 | 851 | XPUSHs(&PL_sv_undef); |
a0d0e21e LW |
852 | RETURN; |
853 | } | |
854 | ||
855 | PP(pp_rv2av) | |
856 | { | |
97aff369 | 857 | dVAR; dSP; dTOPss; |
cde874ca | 858 | const I32 gimme = GIMME_V; |
17ab7946 NC |
859 | static const char an_array[] = "an ARRAY"; |
860 | static const char a_hash[] = "a HASH"; | |
861 | const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV; | |
d83b45b8 | 862 | const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV; |
a0d0e21e | 863 | |
9026059d | 864 | SvGETMAGIC(sv); |
a0d0e21e | 865 | if (SvROK(sv)) { |
93d7320b DM |
866 | if (SvAMAGIC(sv)) { |
867 | sv = amagic_deref_call(sv, is_pp_rv2av ? to_av_amg : to_hv_amg); | |
93d7320b | 868 | } |
17ab7946 NC |
869 | sv = SvRV(sv); |
870 | if (SvTYPE(sv) != type) | |
dcbac5bb | 871 | /* diag_listed_as: Not an ARRAY reference */ |
17ab7946 | 872 | DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash); |
3da99855 FC |
873 | else if (PL_op->op_flags & OPf_MOD |
874 | && PL_op->op_private & OPpLVAL_INTRO) | |
875 | Perl_croak(aTHX_ "%s", PL_no_localize_ref); | |
a0d0e21e | 876 | } |
9f527363 | 877 | else if (SvTYPE(sv) != type) { |
67955e0c | 878 | GV *gv; |
1c846c1f | 879 | |
6e592b3a | 880 | if (!isGV_with_GP(sv)) { |
dc3c76f8 NC |
881 | gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash, |
882 | type, &sp); | |
883 | if (!gv) | |
884 | RETURN; | |
35cd451c GS |
885 | } |
886 | else { | |
159b6efe | 887 | gv = MUTABLE_GV(sv); |
a0d0e21e | 888 | } |
ad64d0ec | 889 | sv = is_pp_rv2av ? MUTABLE_SV(GvAVn(gv)) : MUTABLE_SV(GvHVn(gv)); |
533c011a | 890 | if (PL_op->op_private & OPpLVAL_INTRO) |
ad64d0ec | 891 | sv = is_pp_rv2av ? MUTABLE_SV(save_ary(gv)) : MUTABLE_SV(save_hash(gv)); |
9f527363 FC |
892 | } |
893 | if (PL_op->op_flags & OPf_REF) { | |
17ab7946 | 894 | SETs(sv); |
a0d0e21e | 895 | RETURN; |
9f527363 FC |
896 | } |
897 | else if (PL_op->op_private & OPpMAYBE_LVSUB) { | |
40c94d11 FC |
898 | const I32 flags = is_lvalue_sub(); |
899 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
cde874ca | 900 | if (gimme != G_ARRAY) |
042560a6 | 901 | goto croak_cant_return; |
17ab7946 | 902 | SETs(sv); |
78f9721b | 903 | RETURN; |
40c94d11 | 904 | } |
a0d0e21e LW |
905 | } |
906 | ||
17ab7946 | 907 | if (is_pp_rv2av) { |
502c6561 | 908 | AV *const av = MUTABLE_AV(sv); |
486ec47a | 909 | /* The guts of pp_rv2av, with no intending change to preserve history |
17ab7946 NC |
910 | (until such time as we get tools that can do blame annotation across |
911 | whitespace changes. */ | |
96913b52 | 912 | if (gimme == G_ARRAY) { |
d5524600 DM |
913 | SP--; |
914 | PUTBACK; | |
915 | S_pushav(aTHX_ av); | |
916 | SPAGAIN; | |
1c846c1f | 917 | } |
96913b52 VP |
918 | else if (gimme == G_SCALAR) { |
919 | dTARGET; | |
920 | const I32 maxarg = AvFILL(av) + 1; | |
921 | SETi(maxarg); | |
93965878 | 922 | } |
17ab7946 NC |
923 | } else { |
924 | /* The guts of pp_rv2hv */ | |
96913b52 VP |
925 | if (gimme == G_ARRAY) { /* array wanted */ |
926 | *PL_stack_sp = sv; | |
981b7185 | 927 | return Perl_do_kv(aTHX); |
96913b52 | 928 | } |
c8fe3bdf | 929 | else if ((PL_op->op_private & OPpTRUEBOOL |
adc42c31 | 930 | || ( PL_op->op_private & OPpMAYBE_TRUEBOOL |
c8fe3bdf FC |
931 | && block_gimme() == G_VOID )) |
932 | && (!SvRMAGICAL(sv) || !mg_find(sv, PERL_MAGIC_tied))) | |
933 | SETs(HvUSEDKEYS(sv) ? &PL_sv_yes : sv_2mortal(newSViv(0))); | |
96913b52 VP |
934 | else if (gimme == G_SCALAR) { |
935 | dTARGET; | |
936 | TARG = Perl_hv_scalar(aTHX_ MUTABLE_HV(sv)); | |
937 | SPAGAIN; | |
938 | SETTARG; | |
939 | } | |
17ab7946 | 940 | } |
be85d344 | 941 | RETURN; |
042560a6 NC |
942 | |
943 | croak_cant_return: | |
944 | Perl_croak(aTHX_ "Can't return %s to lvalue scalar context", | |
945 | is_pp_rv2av ? "array" : "hash"); | |
77e217c6 | 946 | RETURN; |
a0d0e21e LW |
947 | } |
948 | ||
10c8fecd GS |
949 | STATIC void |
950 | S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem) | |
951 | { | |
97aff369 | 952 | dVAR; |
7918f24d NC |
953 | |
954 | PERL_ARGS_ASSERT_DO_ODDBALL; | |
955 | ||
10c8fecd GS |
956 | if (*relem) { |
957 | SV *tmpstr; | |
b464bac0 | 958 | const HE *didstore; |
6d822dc4 MS |
959 | |
960 | if (ckWARN(WARN_MISC)) { | |
a3b680e6 | 961 | const char *err; |
10c8fecd GS |
962 | if (relem == firstrelem && |
963 | SvROK(*relem) && | |
964 | (SvTYPE(SvRV(*relem)) == SVt_PVAV || | |
965 | SvTYPE(SvRV(*relem)) == SVt_PVHV)) | |
966 | { | |
a3b680e6 | 967 | err = "Reference found where even-sized list expected"; |
10c8fecd GS |
968 | } |
969 | else | |
a3b680e6 | 970 | err = "Odd number of elements in hash assignment"; |
f1f66076 | 971 | Perl_warner(aTHX_ packWARN(WARN_MISC), "%s", err); |
10c8fecd | 972 | } |
6d822dc4 | 973 | |
561b68a9 | 974 | tmpstr = newSV(0); |
6d822dc4 MS |
975 | didstore = hv_store_ent(hash,*relem,tmpstr,0); |
976 | if (SvMAGICAL(hash)) { | |
977 | if (SvSMAGICAL(tmpstr)) | |
978 | mg_set(tmpstr); | |
979 | if (!didstore) | |
980 | sv_2mortal(tmpstr); | |
981 | } | |
982 | TAINT_NOT; | |
10c8fecd GS |
983 | } |
984 | } | |
985 | ||
a0d0e21e LW |
986 | PP(pp_aassign) |
987 | { | |
27da23d5 | 988 | dVAR; dSP; |
3280af22 NIS |
989 | SV **lastlelem = PL_stack_sp; |
990 | SV **lastrelem = PL_stack_base + POPMARK; | |
991 | SV **firstrelem = PL_stack_base + POPMARK + 1; | |
a0d0e21e LW |
992 | SV **firstlelem = lastrelem + 1; |
993 | ||
eb578fdb KW |
994 | SV **relem; |
995 | SV **lelem; | |
a0d0e21e | 996 | |
eb578fdb KW |
997 | SV *sv; |
998 | AV *ary; | |
a0d0e21e | 999 | |
54310121 | 1000 | I32 gimme; |
a0d0e21e LW |
1001 | HV *hash; |
1002 | I32 i; | |
1003 | int magic; | |
ca65944e | 1004 | int duplicates = 0; |
cbbf8932 | 1005 | SV **firsthashrelem = NULL; /* "= 0" keeps gcc 2.95 quiet */ |
5637b936 | 1006 | |
3280af22 | 1007 | PL_delaymagic = DM_DELAY; /* catch simultaneous items */ |
ca65944e | 1008 | gimme = GIMME_V; |
a0d0e21e LW |
1009 | |
1010 | /* If there's a common identifier on both sides we have to take | |
1011 | * special care that assigning the identifier on the left doesn't | |
1012 | * clobber a value on the right that's used later in the list. | |
acdea6f0 | 1013 | * Don't bother if LHS is just an empty hash or array. |
a0d0e21e | 1014 | */ |
acdea6f0 DM |
1015 | |
1016 | if ( (PL_op->op_private & OPpASSIGN_COMMON) | |
1017 | && ( | |
1018 | firstlelem != lastlelem | |
1019 | || ! ((sv = *firstlelem)) | |
1020 | || SvMAGICAL(sv) | |
1021 | || ! (SvTYPE(sv) == SVt_PVAV || SvTYPE(sv) == SVt_PVHV) | |
1022 | || (SvTYPE(sv) == SVt_PVAV && AvFILL((AV*)sv) != -1) | |
1b95d04f | 1023 | || (SvTYPE(sv) == SVt_PVHV && HvUSEDKEYS((HV*)sv) != 0) |
acdea6f0 DM |
1024 | ) |
1025 | ) { | |
cc5e57d2 | 1026 | EXTEND_MORTAL(lastrelem - firstrelem + 1); |
10c8fecd | 1027 | for (relem = firstrelem; relem <= lastrelem; relem++) { |
155aba94 | 1028 | if ((sv = *relem)) { |
a1f49e72 | 1029 | TAINT_NOT; /* Each item is independent */ |
61e5f455 NC |
1030 | |
1031 | /* Dear TODO test in t/op/sort.t, I love you. | |
1032 | (It's relying on a panic, not a "semi-panic" from newSVsv() | |
1033 | and then an assertion failure below.) */ | |
1034 | if (SvIS_FREED(sv)) { | |
1035 | Perl_croak(aTHX_ "panic: attempt to copy freed scalar %p", | |
1036 | (void*)sv); | |
1037 | } | |
2203fb5a FC |
1038 | /* Not newSVsv(), as it does not allow copy-on-write, |
1039 | resulting in wasteful copies. We need a second copy of | |
1040 | a temp here, hence the SV_NOSTEAL. */ | |
1041 | *relem = sv_mortalcopy_flags(sv,SV_GMAGIC|SV_DO_COW_SVSETSV | |
1042 | |SV_NOSTEAL); | |
a1f49e72 | 1043 | } |
10c8fecd | 1044 | } |
a0d0e21e LW |
1045 | } |
1046 | ||
1047 | relem = firstrelem; | |
1048 | lelem = firstlelem; | |
4608196e RGS |
1049 | ary = NULL; |
1050 | hash = NULL; | |
10c8fecd | 1051 | |
a0d0e21e | 1052 | while (lelem <= lastlelem) { |
bbce6d69 | 1053 | TAINT_NOT; /* Each item stands on its own, taintwise. */ |
a0d0e21e LW |
1054 | sv = *lelem++; |
1055 | switch (SvTYPE(sv)) { | |
1056 | case SVt_PVAV: | |
60edcf09 | 1057 | ary = MUTABLE_AV(sv); |
748a9306 | 1058 | magic = SvMAGICAL(ary) != 0; |
60edcf09 FC |
1059 | ENTER; |
1060 | SAVEFREESV(SvREFCNT_inc_simple_NN(sv)); | |
a0d0e21e | 1061 | av_clear(ary); |
7e42bd57 | 1062 | av_extend(ary, lastrelem - relem); |
a0d0e21e LW |
1063 | i = 0; |
1064 | while (relem <= lastrelem) { /* gobble up all the rest */ | |
5117ca91 | 1065 | SV **didstore; |
a0d0e21e | 1066 | assert(*relem); |
18024492 FC |
1067 | SvGETMAGIC(*relem); /* before newSV, in case it dies */ |
1068 | sv = newSV(0); | |
1069 | sv_setsv_nomg(sv, *relem); | |
a0d0e21e | 1070 | *(relem++) = sv; |
5117ca91 GS |
1071 | didstore = av_store(ary,i++,sv); |
1072 | if (magic) { | |
18024492 FC |
1073 | if (!didstore) |
1074 | sv_2mortal(sv); | |
8ef24240 | 1075 | if (SvSMAGICAL(sv)) |
fb73857a | 1076 | mg_set(sv); |
5117ca91 | 1077 | } |
bbce6d69 | 1078 | TAINT_NOT; |
a0d0e21e | 1079 | } |
354b0578 | 1080 | if (PL_delaymagic & DM_ARRAY_ISA) |
ad64d0ec | 1081 | SvSETMAGIC(MUTABLE_SV(ary)); |
60edcf09 | 1082 | LEAVE; |
a0d0e21e | 1083 | break; |
10c8fecd | 1084 | case SVt_PVHV: { /* normal hash */ |
a0d0e21e | 1085 | SV *tmpstr; |
45960564 | 1086 | SV** topelem = relem; |
a0d0e21e | 1087 | |
60edcf09 | 1088 | hash = MUTABLE_HV(sv); |
748a9306 | 1089 | magic = SvMAGICAL(hash) != 0; |
60edcf09 FC |
1090 | ENTER; |
1091 | SAVEFREESV(SvREFCNT_inc_simple_NN(sv)); | |
a0d0e21e | 1092 | hv_clear(hash); |
ca65944e | 1093 | firsthashrelem = relem; |
a0d0e21e LW |
1094 | |
1095 | while (relem < lastrelem) { /* gobble up all the rest */ | |
5117ca91 | 1096 | HE *didstore; |
6136c704 AL |
1097 | sv = *relem ? *relem : &PL_sv_no; |
1098 | relem++; | |
9c744f4f | 1099 | tmpstr = sv_newmortal(); |
a0d0e21e LW |
1100 | if (*relem) |
1101 | sv_setsv(tmpstr,*relem); /* value */ | |
45960564 DM |
1102 | relem++; |
1103 | if (gimme != G_VOID) { | |
1104 | if (hv_exists_ent(hash, sv, 0)) | |
1105 | /* key overwrites an existing entry */ | |
1106 | duplicates += 2; | |
1107 | else | |
1108 | if (gimme == G_ARRAY) { | |
1109 | /* copy element back: possibly to an earlier | |
1110 | * stack location if we encountered dups earlier */ | |
1111 | *topelem++ = sv; | |
1112 | *topelem++ = tmpstr; | |
1113 | } | |
1114 | } | |
5117ca91 | 1115 | didstore = hv_store_ent(hash,sv,tmpstr,0); |
9c744f4f | 1116 | if (didstore) SvREFCNT_inc_simple_void_NN(tmpstr); |
5117ca91 | 1117 | if (magic) { |
8ef24240 | 1118 | if (SvSMAGICAL(tmpstr)) |
fb73857a | 1119 | mg_set(tmpstr); |
5117ca91 | 1120 | } |
bbce6d69 | 1121 | TAINT_NOT; |
8e07c86e | 1122 | } |
6a0deba8 | 1123 | if (relem == lastrelem) { |
10c8fecd | 1124 | do_oddball(hash, relem, firstrelem); |
6a0deba8 | 1125 | relem++; |
1930e939 | 1126 | } |
60edcf09 | 1127 | LEAVE; |
a0d0e21e LW |
1128 | } |
1129 | break; | |
1130 | default: | |
6fc92669 GS |
1131 | if (SvIMMORTAL(sv)) { |
1132 | if (relem <= lastrelem) | |
1133 | relem++; | |
1134 | break; | |
a0d0e21e LW |
1135 | } |
1136 | if (relem <= lastrelem) { | |
1c70fb82 FC |
1137 | if ( |
1138 | SvTEMP(sv) && !SvSMAGICAL(sv) && SvREFCNT(sv) == 1 && | |
1139 | (!isGV_with_GP(sv) || SvFAKE(sv)) && ckWARN(WARN_MISC) | |
1140 | ) | |
1141 | Perl_warner(aTHX_ | |
1142 | packWARN(WARN_MISC), | |
1143 | "Useless assignment to a temporary" | |
1144 | ); | |
a0d0e21e LW |
1145 | sv_setsv(sv, *relem); |
1146 | *(relem++) = sv; | |
1147 | } | |
1148 | else | |
3280af22 | 1149 | sv_setsv(sv, &PL_sv_undef); |
8ef24240 | 1150 | SvSETMAGIC(sv); |
a0d0e21e LW |
1151 | break; |
1152 | } | |
1153 | } | |
3280af22 | 1154 | if (PL_delaymagic & ~DM_DELAY) { |
985213f2 AB |
1155 | /* Will be used to set PL_tainting below */ |
1156 | UV tmp_uid = PerlProc_getuid(); | |
1157 | UV tmp_euid = PerlProc_geteuid(); | |
1158 | UV tmp_gid = PerlProc_getgid(); | |
1159 | UV tmp_egid = PerlProc_getegid(); | |
1160 | ||
3280af22 | 1161 | if (PL_delaymagic & DM_UID) { |
a0d0e21e | 1162 | #ifdef HAS_SETRESUID |
985213f2 AB |
1163 | (void)setresuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, |
1164 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1, | |
fb934a90 | 1165 | (Uid_t)-1); |
56febc5e AD |
1166 | #else |
1167 | # ifdef HAS_SETREUID | |
985213f2 AB |
1168 | (void)setreuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, |
1169 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1); | |
56febc5e AD |
1170 | # else |
1171 | # ifdef HAS_SETRUID | |
b28d0864 | 1172 | if ((PL_delaymagic & DM_UID) == DM_RUID) { |
985213f2 | 1173 | (void)setruid(PL_delaymagic_uid); |
b28d0864 | 1174 | PL_delaymagic &= ~DM_RUID; |
a0d0e21e | 1175 | } |
56febc5e AD |
1176 | # endif /* HAS_SETRUID */ |
1177 | # ifdef HAS_SETEUID | |
b28d0864 | 1178 | if ((PL_delaymagic & DM_UID) == DM_EUID) { |
985213f2 | 1179 | (void)seteuid(PL_delaymagic_euid); |
b28d0864 | 1180 | PL_delaymagic &= ~DM_EUID; |
a0d0e21e | 1181 | } |
56febc5e | 1182 | # endif /* HAS_SETEUID */ |
b28d0864 | 1183 | if (PL_delaymagic & DM_UID) { |
985213f2 | 1184 | if (PL_delaymagic_uid != PL_delaymagic_euid) |
cea2e8a9 | 1185 | DIE(aTHX_ "No setreuid available"); |
985213f2 | 1186 | (void)PerlProc_setuid(PL_delaymagic_uid); |
a0d0e21e | 1187 | } |
56febc5e AD |
1188 | # endif /* HAS_SETREUID */ |
1189 | #endif /* HAS_SETRESUID */ | |
985213f2 AB |
1190 | tmp_uid = PerlProc_getuid(); |
1191 | tmp_euid = PerlProc_geteuid(); | |
a0d0e21e | 1192 | } |
3280af22 | 1193 | if (PL_delaymagic & DM_GID) { |
a0d0e21e | 1194 | #ifdef HAS_SETRESGID |
985213f2 AB |
1195 | (void)setresgid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, |
1196 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1, | |
fb934a90 | 1197 | (Gid_t)-1); |
56febc5e AD |
1198 | #else |
1199 | # ifdef HAS_SETREGID | |
985213f2 AB |
1200 | (void)setregid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, |
1201 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1); | |
56febc5e AD |
1202 | # else |
1203 | # ifdef HAS_SETRGID | |
b28d0864 | 1204 | if ((PL_delaymagic & DM_GID) == DM_RGID) { |
985213f2 | 1205 | (void)setrgid(PL_delaymagic_gid); |
b28d0864 | 1206 | PL_delaymagic &= ~DM_RGID; |
a0d0e21e | 1207 | } |
56febc5e AD |
1208 | # endif /* HAS_SETRGID */ |
1209 | # ifdef HAS_SETEGID | |
b28d0864 | 1210 | if ((PL_delaymagic & DM_GID) == DM_EGID) { |
985213f2 | 1211 | (void)setegid(PL_delaymagic_egid); |
b28d0864 | 1212 | PL_delaymagic &= ~DM_EGID; |
a0d0e21e | 1213 | } |
56febc5e | 1214 | # endif /* HAS_SETEGID */ |
b28d0864 | 1215 | if (PL_delaymagic & DM_GID) { |
985213f2 | 1216 | if (PL_delaymagic_gid != PL_delaymagic_egid) |
cea2e8a9 | 1217 | DIE(aTHX_ "No setregid available"); |
985213f2 | 1218 | (void)PerlProc_setgid(PL_delaymagic_gid); |
a0d0e21e | 1219 | } |
56febc5e AD |
1220 | # endif /* HAS_SETREGID */ |
1221 | #endif /* HAS_SETRESGID */ | |
985213f2 AB |
1222 | tmp_gid = PerlProc_getgid(); |
1223 | tmp_egid = PerlProc_getegid(); | |
a0d0e21e | 1224 | } |
284167a5 | 1225 | TAINTING_set( TAINTING_get | (tmp_uid && (tmp_euid != tmp_uid || tmp_egid != tmp_gid)) ); |
a0d0e21e | 1226 | } |
3280af22 | 1227 | PL_delaymagic = 0; |
54310121 | 1228 | |
54310121 | 1229 | if (gimme == G_VOID) |
1230 | SP = firstrelem - 1; | |
1231 | else if (gimme == G_SCALAR) { | |
1232 | dTARGET; | |
1233 | SP = firstrelem; | |
ca65944e | 1234 | SETi(lastrelem - firstrelem + 1 - duplicates); |
54310121 | 1235 | } |
1236 | else { | |
ca65944e | 1237 | if (ary) |
a0d0e21e | 1238 | SP = lastrelem; |
ca65944e RGS |
1239 | else if (hash) { |
1240 | if (duplicates) { | |
45960564 DM |
1241 | /* at this point we have removed the duplicate key/value |
1242 | * pairs from the stack, but the remaining values may be | |
1243 | * wrong; i.e. with (a 1 a 2 b 3) on the stack we've removed | |
1244 | * the (a 2), but the stack now probably contains | |
1245 | * (a <freed> b 3), because { hv_save(a,1); hv_save(a,2) } | |
1246 | * obliterates the earlier key. So refresh all values. */ | |
ca65944e | 1247 | lastrelem -= duplicates; |
45960564 DM |
1248 | relem = firsthashrelem; |
1249 | while (relem < lastrelem) { | |
1250 | HE *he; | |
1251 | sv = *relem++; | |
1252 | he = hv_fetch_ent(hash, sv, 0, 0); | |
1253 | *relem++ = (he ? HeVAL(he) : &PL_sv_undef); | |
1254 | } | |
ca65944e RGS |
1255 | } |
1256 | SP = lastrelem; | |
1257 | } | |
a0d0e21e LW |
1258 | else |
1259 | SP = firstrelem + (lastlelem - firstlelem); | |
0c8c7a05 | 1260 | lelem = firstlelem + (relem - firstrelem); |
5f05dabc | 1261 | while (relem <= SP) |
3280af22 | 1262 | *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef; |
a0d0e21e | 1263 | } |
08aeb9f7 | 1264 | |
54310121 | 1265 | RETURN; |
a0d0e21e LW |
1266 | } |
1267 | ||
8782bef2 GB |
1268 | PP(pp_qr) |
1269 | { | |
97aff369 | 1270 | dVAR; dSP; |
eb578fdb | 1271 | PMOP * const pm = cPMOP; |
fe578d7f | 1272 | REGEXP * rx = PM_GETRE(pm); |
10599a69 | 1273 | SV * const pkg = rx ? CALLREG_PACKAGE(rx) : NULL; |
c4420975 | 1274 | SV * const rv = sv_newmortal(); |
d63c20f2 DM |
1275 | CV **cvp; |
1276 | CV *cv; | |
288b8c02 NC |
1277 | |
1278 | SvUPGRADE(rv, SVt_IV); | |
c2123ae3 NC |
1279 | /* For a subroutine describing itself as "This is a hacky workaround" I'm |
1280 | loathe to use it here, but it seems to be the right fix. Or close. | |
1281 | The key part appears to be that it's essential for pp_qr to return a new | |
1282 | object (SV), which implies that there needs to be an effective way to | |
1283 | generate a new SV from the existing SV that is pre-compiled in the | |
1284 | optree. */ | |
1285 | SvRV_set(rv, MUTABLE_SV(reg_temp_copy(NULL, rx))); | |
288b8c02 NC |
1286 | SvROK_on(rv); |
1287 | ||
8d919b0a | 1288 | cvp = &( ReANY((REGEXP *)SvRV(rv))->qr_anoncv); |
d63c20f2 DM |
1289 | if ((cv = *cvp) && CvCLONE(*cvp)) { |
1290 | *cvp = cv_clone(cv); | |
1291 | SvREFCNT_dec(cv); | |
1292 | } | |
1293 | ||
288b8c02 | 1294 | if (pkg) { |
f815daf2 | 1295 | HV *const stash = gv_stashsv(pkg, GV_ADD); |
a954f6ee | 1296 | SvREFCNT_dec(pkg); |
288b8c02 NC |
1297 | (void)sv_bless(rv, stash); |
1298 | } | |
1299 | ||
284167a5 | 1300 | if (RX_ISTAINTED(rx)) { |
e08e52cf | 1301 | SvTAINTED_on(rv); |
9274aefd DM |
1302 | SvTAINTED_on(SvRV(rv)); |
1303 | } | |
c8c13c22 JB |
1304 | XPUSHs(rv); |
1305 | RETURN; | |
8782bef2 GB |
1306 | } |
1307 | ||
a0d0e21e LW |
1308 | PP(pp_match) |
1309 | { | |
97aff369 | 1310 | dVAR; dSP; dTARG; |
eb578fdb | 1311 | PMOP *pm = cPMOP; |
d65afb4b | 1312 | PMOP *dynpm = pm; |
eb578fdb KW |
1313 | const char *t; |
1314 | const char *s; | |
5c144d81 | 1315 | const char *strend; |
a0d0e21e | 1316 | I32 global; |
1ed74d04 | 1317 | U8 r_flags = REXEC_CHECKED; |
5c144d81 | 1318 | const char *truebase; /* Start of string */ |
eb578fdb | 1319 | REGEXP *rx = PM_GETRE(pm); |
b3eb6a9b | 1320 | bool rxtainted; |
a3b680e6 | 1321 | const I32 gimme = GIMME; |
a0d0e21e | 1322 | STRLEN len; |
748a9306 | 1323 | I32 minmatch = 0; |
a3b680e6 | 1324 | const I32 oldsave = PL_savestack_ix; |
f86702cc | 1325 | I32 update_minmatch = 1; |
e60df1fa | 1326 | I32 had_zerolen = 0; |
58e23c8d | 1327 | U32 gpos = 0; |
a0d0e21e | 1328 | |
533c011a | 1329 | if (PL_op->op_flags & OPf_STACKED) |
a0d0e21e | 1330 | TARG = POPs; |
59f00321 RGS |
1331 | else if (PL_op->op_private & OPpTARGET_MY) |
1332 | GETTARGET; | |
a0d0e21e | 1333 | else { |
54b9620d | 1334 | TARG = DEFSV; |
a0d0e21e LW |
1335 | EXTEND(SP,1); |
1336 | } | |
d9f424b2 | 1337 | |
c277df42 | 1338 | PUTBACK; /* EVAL blocks need stack_sp. */ |
69dc4b30 FC |
1339 | /* Skip get-magic if this is a qr// clone, because regcomp has |
1340 | already done it. */ | |
8d919b0a | 1341 | s = ReANY(rx)->mother_re |
69dc4b30 FC |
1342 | ? SvPV_nomg_const(TARG, len) |
1343 | : SvPV_const(TARG, len); | |
a0d0e21e | 1344 | if (!s) |
2269b42e | 1345 | DIE(aTHX_ "panic: pp_match"); |
890ce7af | 1346 | strend = s + len; |
284167a5 S |
1347 | rxtainted = (RX_ISTAINTED(rx) || |
1348 | (TAINT_get && (pm->op_pmflags & PMf_RETAINT))); | |
9212bbba | 1349 | TAINT_NOT; |
a0d0e21e | 1350 | |
a30b2f1f | 1351 | RX_MATCH_UTF8_set(rx, DO_UTF8(TARG)); |
d9f424b2 | 1352 | |
d65afb4b | 1353 | /* PMdf_USED is set after a ?? matches once */ |
c737faaf YO |
1354 | if ( |
1355 | #ifdef USE_ITHREADS | |
1356 | SvREADONLY(PL_regex_pad[pm->op_pmoffset]) | |
1357 | #else | |
1358 | pm->op_pmflags & PMf_USED | |
1359 | #endif | |
1360 | ) { | |
e5dc5375 | 1361 | DEBUG_r(PerlIO_printf(Perl_debug_log, "?? already matched once")); |
c277df42 | 1362 | failure: |
e5dc5375 | 1363 | |
a0d0e21e LW |
1364 | if (gimme == G_ARRAY) |
1365 | RETURN; | |
1366 | RETPUSHNO; | |
1367 | } | |
1368 | ||
c737faaf YO |
1369 | |
1370 | ||
7e313637 FC |
1371 | /* empty pattern special-cased to use last successful pattern if |
1372 | possible, except for qr// */ | |
8d919b0a | 1373 | if (!ReANY(rx)->mother_re && !RX_PRELEN(rx) |
7e313637 | 1374 | && PL_curpm) { |
3280af22 | 1375 | pm = PL_curpm; |
aaa362c4 | 1376 | rx = PM_GETRE(pm); |
a0d0e21e | 1377 | } |
d65afb4b | 1378 | |
e5dc5375 KW |
1379 | if (RX_MINLEN(rx) > (I32)len) { |
1380 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String shorter than min possible regex match\n")); | |
d65afb4b | 1381 | goto failure; |
e5dc5375 | 1382 | } |
c277df42 | 1383 | |
a0d0e21e | 1384 | truebase = t = s; |
ad94a511 IZ |
1385 | |
1386 | /* XXXX What part of this is needed with true \G-support? */ | |
d65afb4b | 1387 | if ((global = dynpm->op_pmflags & PMf_GLOBAL)) { |
07bc277f | 1388 | RX_OFFS(rx)[0].start = -1; |
a0d0e21e | 1389 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) { |
c445ea15 | 1390 | MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global); |
565764a8 | 1391 | if (mg && mg->mg_len >= 0) { |
07bc277f NC |
1392 | if (!(RX_EXTFLAGS(rx) & RXf_GPOS_SEEN)) |
1393 | RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len; | |
1394 | else if (RX_EXTFLAGS(rx) & RXf_ANCH_GPOS) { | |
0ef3e39e | 1395 | r_flags |= REXEC_IGNOREPOS; |
07bc277f NC |
1396 | RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len; |
1397 | } else if (RX_EXTFLAGS(rx) & RXf_GPOS_FLOAT) | |
58e23c8d YO |
1398 | gpos = mg->mg_len; |
1399 | else | |
07bc277f NC |
1400 | RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len; |
1401 | minmatch = (mg->mg_flags & MGf_MINMATCH) ? RX_GOFS(rx) + 1 : 0; | |
f86702cc | 1402 | update_minmatch = 0; |
748a9306 | 1403 | } |
a0d0e21e LW |
1404 | } |
1405 | } | |
a41aa44d | 1406 | if ( RX_NPARENS(rx) |
6502e081 | 1407 | || PL_sawampersand |
6502e081 DM |
1408 | || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
1409 | ) { | |
1410 | r_flags |= (REXEC_COPY_STR|REXEC_COPY_SKIP_PRE); | |
1411 | /* in @a =~ /(.)/g, we iterate multiple times, but copy the buffer | |
1412 | * only on the first iteration. Therefore we need to copy $' as well | |
1413 | * as $&, to make the rest of the string available for captures in | |
1414 | * subsequent iterations */ | |
1415 | if (! (global && gimme == G_ARRAY)) | |
1416 | r_flags |= REXEC_COPY_SKIP_POST; | |
1417 | }; | |
22e551b9 | 1418 | |
d7be1480 | 1419 | play_it_again: |
07bc277f NC |
1420 | if (global && RX_OFFS(rx)[0].start != -1) { |
1421 | t = s = RX_OFFS(rx)[0].end + truebase - RX_GOFS(rx); | |
e5dc5375 KW |
1422 | if ((s + RX_MINLEN(rx)) > strend || s < truebase) { |
1423 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Regex match can't succeed, so not even tried\n")); | |
a0d0e21e | 1424 | goto nope; |
e5dc5375 | 1425 | } |
f86702cc | 1426 | if (update_minmatch++) |
e60df1fa | 1427 | minmatch = had_zerolen; |
a0d0e21e | 1428 | } |
07bc277f | 1429 | if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT && |
3c8556c3 | 1430 | DO_UTF8(TARG) == (RX_UTF8(rx) != 0)) { |
5c144d81 NC |
1431 | /* FIXME - can PL_bostr be made const char *? */ |
1432 | PL_bostr = (char *)truebase; | |
f9f4320a | 1433 | s = CALLREG_INTUIT_START(rx, TARG, (char *)s, (char *)strend, r_flags, NULL); |
f722798b IZ |
1434 | |
1435 | if (!s) | |
1436 | goto nope; | |
07bc277f | 1437 | if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL) |
14977893 | 1438 | && !PL_sawampersand |
07bc277f | 1439 | && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) |
05b4157f | 1440 | && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */ |
f722798b | 1441 | goto yup; |
a0d0e21e | 1442 | } |
77da2310 NC |
1443 | if (!CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase, |
1444 | minmatch, TARG, NUM2PTR(void*, gpos), r_flags)) | |
1445 | goto ret_no; | |
1446 | ||
1447 | PL_curpm = pm; | |
1448 | if (dynpm->op_pmflags & PMf_ONCE) { | |
c737faaf | 1449 | #ifdef USE_ITHREADS |
77da2310 | 1450 | SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]); |
c737faaf | 1451 | #else |
77da2310 | 1452 | dynpm->op_pmflags |= PMf_USED; |
c737faaf | 1453 | #endif |
a0d0e21e | 1454 | } |
a0d0e21e LW |
1455 | |
1456 | gotcha: | |
72311751 GS |
1457 | if (rxtainted) |
1458 | RX_MATCH_TAINTED_on(rx); | |
1459 | TAINT_IF(RX_MATCH_TAINTED(rx)); | |
a0d0e21e | 1460 | if (gimme == G_ARRAY) { |
07bc277f | 1461 | const I32 nparens = RX_NPARENS(rx); |
a3b680e6 | 1462 | I32 i = (global && !nparens) ? 1 : 0; |
a0d0e21e | 1463 | |
c277df42 | 1464 | SPAGAIN; /* EVAL blocks could move the stack. */ |
ffc61ed2 JH |
1465 | EXTEND(SP, nparens + i); |
1466 | EXTEND_MORTAL(nparens + i); | |
1467 | for (i = !i; i <= nparens; i++) { | |
a0d0e21e | 1468 | PUSHs(sv_newmortal()); |
07bc277f NC |
1469 | if ((RX_OFFS(rx)[i].start != -1) && RX_OFFS(rx)[i].end != -1 ) { |
1470 | const I32 len = RX_OFFS(rx)[i].end - RX_OFFS(rx)[i].start; | |
1471 | s = RX_OFFS(rx)[i].start + truebase; | |
1472 | if (RX_OFFS(rx)[i].end < 0 || RX_OFFS(rx)[i].start < 0 || | |
290deeac | 1473 | len < 0 || len > strend - s) |
5637ef5b NC |
1474 | DIE(aTHX_ "panic: pp_match start/end pointers, i=%ld, " |
1475 | "start=%ld, end=%ld, s=%p, strend=%p, len=%"UVuf, | |
1476 | (long) i, (long) RX_OFFS(rx)[i].start, | |
1477 | (long)RX_OFFS(rx)[i].end, s, strend, (UV) len); | |
a0d0e21e | 1478 | sv_setpvn(*SP, s, len); |
cce850e4 | 1479 | if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len)) |
a197cbdd | 1480 | SvUTF8_on(*SP); |
a0d0e21e LW |
1481 | } |
1482 | } | |
1483 | if (global) { | |
d65afb4b | 1484 | if (dynpm->op_pmflags & PMf_CONTINUE) { |
6136c704 | 1485 | MAGIC* mg = NULL; |
0af80b60 HS |
1486 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) |
1487 | mg = mg_find(TARG, PERL_MAGIC_regex_global); | |
1488 | if (!mg) { | |
d83f0a82 NC |
1489 | #ifdef PERL_OLD_COPY_ON_WRITE |
1490 | if (SvIsCOW(TARG)) | |
1491 | sv_force_normal_flags(TARG, 0); | |
1492 | #endif | |
1493 | mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global, | |
1494 | &PL_vtbl_mglob, NULL, 0); | |
0af80b60 | 1495 | } |
07bc277f NC |
1496 | if (RX_OFFS(rx)[0].start != -1) { |
1497 | mg->mg_len = RX_OFFS(rx)[0].end; | |
1498 | if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end) | |
0af80b60 HS |
1499 | mg->mg_flags |= MGf_MINMATCH; |
1500 | else | |
1501 | mg->mg_flags &= ~MGf_MINMATCH; | |
1502 | } | |
1503 | } | |
07bc277f NC |
1504 | had_zerolen = (RX_OFFS(rx)[0].start != -1 |
1505 | && (RX_OFFS(rx)[0].start + RX_GOFS(rx) | |
1506 | == (UV)RX_OFFS(rx)[0].end)); | |
c277df42 | 1507 | PUTBACK; /* EVAL blocks may use stack */ |
cf93c79d | 1508 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
a0d0e21e LW |
1509 | goto play_it_again; |
1510 | } | |
ffc61ed2 | 1511 | else if (!nparens) |
bde848c5 | 1512 | XPUSHs(&PL_sv_yes); |
4633a7c4 | 1513 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
1514 | RETURN; |
1515 | } | |
1516 | else { | |
1517 | if (global) { | |
cbbf8932 | 1518 | MAGIC* mg; |
a0d0e21e | 1519 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) |
14befaf4 | 1520 | mg = mg_find(TARG, PERL_MAGIC_regex_global); |
cbbf8932 AL |
1521 | else |
1522 | mg = NULL; | |
a0d0e21e | 1523 | if (!mg) { |
d83f0a82 NC |
1524 | #ifdef PERL_OLD_COPY_ON_WRITE |
1525 | if (SvIsCOW(TARG)) | |
1526 | sv_force_normal_flags(TARG, 0); | |
1527 | #endif | |
1528 | mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global, | |
1529 | &PL_vtbl_mglob, NULL, 0); | |
a0d0e21e | 1530 | } |
07bc277f NC |
1531 | if (RX_OFFS(rx)[0].start != -1) { |
1532 | mg->mg_len = RX_OFFS(rx)[0].end; | |
1533 | if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end) | |
748a9306 LW |
1534 | mg->mg_flags |= MGf_MINMATCH; |
1535 | else | |
1536 | mg->mg_flags &= ~MGf_MINMATCH; | |
1537 | } | |
a0d0e21e | 1538 | } |
4633a7c4 | 1539 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
1540 | RETPUSHYES; |
1541 | } | |
1542 | ||
f722798b | 1543 | yup: /* Confirmed by INTUIT */ |
72311751 GS |
1544 | if (rxtainted) |
1545 | RX_MATCH_TAINTED_on(rx); | |
1546 | TAINT_IF(RX_MATCH_TAINTED(rx)); | |
3280af22 | 1547 | PL_curpm = pm; |
c737faaf YO |
1548 | if (dynpm->op_pmflags & PMf_ONCE) { |
1549 | #ifdef USE_ITHREADS | |
1550 | SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]); | |
1551 | #else | |
1552 | dynpm->op_pmflags |= PMf_USED; | |
1553 | #endif | |
1554 | } | |
cf93c79d | 1555 | if (RX_MATCH_COPIED(rx)) |
07bc277f | 1556 | Safefree(RX_SUBBEG(rx)); |
cf93c79d | 1557 | RX_MATCH_COPIED_off(rx); |
07bc277f | 1558 | RX_SUBBEG(rx) = NULL; |
a0d0e21e | 1559 | if (global) { |
5c144d81 | 1560 | /* FIXME - should rx->subbeg be const char *? */ |
07bc277f | 1561 | RX_SUBBEG(rx) = (char *) truebase; |
6502e081 DM |
1562 | RX_SUBOFFSET(rx) = 0; |
1563 | RX_SUBCOFFSET(rx) = 0; | |
07bc277f | 1564 | RX_OFFS(rx)[0].start = s - truebase; |
a30b2f1f | 1565 | if (RX_MATCH_UTF8(rx)) { |
07bc277f NC |
1566 | char * const t = (char*)utf8_hop((U8*)s, RX_MINLENRET(rx)); |
1567 | RX_OFFS(rx)[0].end = t - truebase; | |
60aeb6fd NIS |
1568 | } |
1569 | else { | |
07bc277f | 1570 | RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx); |
60aeb6fd | 1571 | } |
07bc277f | 1572 | RX_SUBLEN(rx) = strend - truebase; |
a0d0e21e | 1573 | goto gotcha; |
1c846c1f | 1574 | } |
07bc277f | 1575 | if (PL_sawampersand || RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) { |
14977893 | 1576 | I32 off; |
f8c7b90f | 1577 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
1578 | if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) { |
1579 | if (DEBUG_C_TEST) { | |
1580 | PerlIO_printf(Perl_debug_log, | |
1581 | "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n", | |
6c9570dc | 1582 | (int) SvTYPE(TARG), (void*)truebase, (void*)t, |
ed252734 NC |
1583 | (int)(t-truebase)); |
1584 | } | |
bdd9a1b1 NC |
1585 | RX_SAVED_COPY(rx) = sv_setsv_cow(RX_SAVED_COPY(rx), TARG); |
1586 | RX_SUBBEG(rx) | |
1587 | = (char *) SvPVX_const(RX_SAVED_COPY(rx)) + (t - truebase); | |
1588 | assert (SvPOKp(RX_SAVED_COPY(rx))); | |
ed252734 NC |
1589 | } else |
1590 | #endif | |
1591 | { | |
14977893 | 1592 | |
07bc277f | 1593 | RX_SUBBEG(rx) = savepvn(t, strend - t); |
f8c7b90f | 1594 | #ifdef PERL_OLD_COPY_ON_WRITE |
bdd9a1b1 | 1595 | RX_SAVED_COPY(rx) = NULL; |
ed252734 NC |
1596 | #endif |
1597 | } | |
07bc277f | 1598 | RX_SUBLEN(rx) = strend - t; |
6502e081 DM |
1599 | RX_SUBOFFSET(rx) = 0; |
1600 | RX_SUBCOFFSET(rx) = 0; | |
14977893 | 1601 | RX_MATCH_COPIED_on(rx); |
07bc277f NC |
1602 | off = RX_OFFS(rx)[0].start = s - t; |
1603 | RX_OFFS(rx)[0].end = off + RX_MINLENRET(rx); | |
14977893 JH |
1604 | } |
1605 | else { /* startp/endp are used by @- @+. */ | |
07bc277f NC |
1606 | RX_OFFS(rx)[0].start = s - truebase; |
1607 | RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx); | |
14977893 | 1608 | } |
7e1a2c8d DM |
1609 | /* match via INTUIT shouldn't have any captures. Let @-, @+, $^N know */ |
1610 | assert(!RX_NPARENS(rx)); | |
1611 | RX_LASTPAREN(rx) = RX_LASTCLOSEPAREN(rx) = 0; | |
4633a7c4 | 1612 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
1613 | RETPUSHYES; |
1614 | ||
1615 | nope: | |
a0d0e21e | 1616 | ret_no: |
d65afb4b | 1617 | if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) { |
a0d0e21e | 1618 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) { |
6136c704 | 1619 | MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global); |
a0d0e21e | 1620 | if (mg) |
565764a8 | 1621 | mg->mg_len = -1; |
a0d0e21e LW |
1622 | } |
1623 | } | |
4633a7c4 | 1624 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
1625 | if (gimme == G_ARRAY) |
1626 | RETURN; | |
1627 | RETPUSHNO; | |
1628 | } | |
1629 | ||
1630 | OP * | |
864dbfa3 | 1631 | Perl_do_readline(pTHX) |
a0d0e21e | 1632 | { |
27da23d5 | 1633 | dVAR; dSP; dTARGETSTACKED; |
eb578fdb | 1634 | SV *sv; |
a0d0e21e LW |
1635 | STRLEN tmplen = 0; |
1636 | STRLEN offset; | |
760ac839 | 1637 | PerlIO *fp; |
eb578fdb KW |
1638 | IO * const io = GvIO(PL_last_in_gv); |
1639 | const I32 type = PL_op->op_type; | |
a3b680e6 | 1640 | const I32 gimme = GIMME_V; |
a0d0e21e | 1641 | |
6136c704 | 1642 | if (io) { |
50db69d8 | 1643 | const MAGIC *const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar); |
6136c704 | 1644 | if (mg) { |
50db69d8 | 1645 | Perl_tied_method(aTHX_ "READLINE", SP, MUTABLE_SV(io), mg, gimme, 0); |
6136c704 | 1646 | if (gimme == G_SCALAR) { |
50db69d8 NC |
1647 | SPAGAIN; |
1648 | SvSetSV_nosteal(TARG, TOPs); | |
1649 | SETTARG; | |
6136c704 | 1650 | } |
50db69d8 | 1651 | return NORMAL; |
0b7c7b4f | 1652 | } |
e79b0511 | 1653 | } |
4608196e | 1654 | fp = NULL; |
a0d0e21e LW |
1655 | if (io) { |
1656 | fp = IoIFP(io); | |
1657 | if (!fp) { | |
1658 | if (IoFLAGS(io) & IOf_ARGV) { | |
1659 | if (IoFLAGS(io) & IOf_START) { | |
a0d0e21e | 1660 | IoLINES(io) = 0; |
3280af22 | 1661 | if (av_len(GvAVn(PL_last_in_gv)) < 0) { |
1d7c1841 | 1662 | IoFLAGS(io) &= ~IOf_START; |
4608196e | 1663 | do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,NULL); |
4bac9ae4 | 1664 | SvTAINTED_off(GvSVn(PL_last_in_gv)); /* previous tainting irrelevant */ |
76f68e9b | 1665 | sv_setpvs(GvSVn(PL_last_in_gv), "-"); |
3280af22 | 1666 | SvSETMAGIC(GvSV(PL_last_in_gv)); |
a2008d6d GS |
1667 | fp = IoIFP(io); |
1668 | goto have_fp; | |
a0d0e21e LW |
1669 | } |
1670 | } | |
3280af22 | 1671 | fp = nextargv(PL_last_in_gv); |
a0d0e21e | 1672 | if (!fp) { /* Note: fp != IoIFP(io) */ |
3280af22 | 1673 | (void)do_close(PL_last_in_gv, FALSE); /* now it does*/ |
a0d0e21e LW |
1674 | } |
1675 | } | |
0d44d22b NC |
1676 | else if (type == OP_GLOB) |
1677 | fp = Perl_start_glob(aTHX_ POPs, io); | |
a0d0e21e LW |
1678 | } |
1679 | else if (type == OP_GLOB) | |
1680 | SP--; | |
7716c5c5 | 1681 | else if (IoTYPE(io) == IoTYPE_WRONLY) { |
a5390457 | 1682 | report_wrongway_fh(PL_last_in_gv, '>'); |
a00b5bd3 | 1683 | } |
a0d0e21e LW |
1684 | } |
1685 | if (!fp) { | |
041457d9 DM |
1686 | if ((!io || !(IoFLAGS(io) & IOf_START)) |
1687 | && ckWARN2(WARN_GLOB, WARN_CLOSED)) | |
1688 | { | |
3f4520fe | 1689 | if (type == OP_GLOB) |
63922903 | 1690 | Perl_ck_warner_d(aTHX_ packWARN(WARN_GLOB), |
af8c498a GS |
1691 | "glob failed (can't start child: %s)", |
1692 | Strerror(errno)); | |
69282e91 | 1693 | else |
831e4cc3 | 1694 | report_evil_fh(PL_last_in_gv); |
3f4520fe | 1695 | } |
54310121 | 1696 | if (gimme == G_SCALAR) { |
79628082 | 1697 | /* undef TARG, and push that undefined value */ |
ba92458f AE |
1698 | if (type != OP_RCATLINE) { |
1699 | SV_CHECK_THINKFIRST_COW_DROP(TARG); | |
0c34ef67 | 1700 | SvOK_off(TARG); |
ba92458f | 1701 | } |
a0d0e21e LW |
1702 | PUSHTARG; |
1703 | } | |
1704 | RETURN; | |
1705 | } | |
a2008d6d | 1706 | have_fp: |
54310121 | 1707 | if (gimme == G_SCALAR) { |
a0d0e21e | 1708 | sv = TARG; |
0f722b55 RGS |
1709 | if (type == OP_RCATLINE && SvGMAGICAL(sv)) |
1710 | mg_get(sv); | |
48de12d9 RGS |
1711 | if (SvROK(sv)) { |
1712 | if (type == OP_RCATLINE) | |
5668452f | 1713 | SvPV_force_nomg_nolen(sv); |
48de12d9 RGS |
1714 | else |
1715 | sv_unref(sv); | |
1716 | } | |
f7877b28 | 1717 | else if (isGV_with_GP(sv)) { |
5668452f | 1718 | SvPV_force_nomg_nolen(sv); |
f7877b28 | 1719 | } |
862a34c6 | 1720 | SvUPGRADE(sv, SVt_PV); |
a0d0e21e | 1721 | tmplen = SvLEN(sv); /* remember if already alloced */ |
e3918bb7 | 1722 | if (!tmplen && !SvREADONLY(sv) && !SvIsCOW(sv)) { |
f72e8700 JJ |
1723 | /* try short-buffering it. Please update t/op/readline.t |
1724 | * if you change the growth length. | |
1725 | */ | |
1726 | Sv_Grow(sv, 80); | |
1727 | } | |
2b5e58c4 AMS |
1728 | offset = 0; |
1729 | if (type == OP_RCATLINE && SvOK(sv)) { | |
1730 | if (!SvPOK(sv)) { | |
5668452f | 1731 | SvPV_force_nomg_nolen(sv); |
2b5e58c4 | 1732 | } |
a0d0e21e | 1733 | offset = SvCUR(sv); |
2b5e58c4 | 1734 | } |
a0d0e21e | 1735 | } |
54310121 | 1736 | else { |
561b68a9 | 1737 | sv = sv_2mortal(newSV(80)); |
54310121 | 1738 | offset = 0; |
1739 | } | |
fbad3eb5 | 1740 | |
3887d568 AP |
1741 | /* This should not be marked tainted if the fp is marked clean */ |
1742 | #define MAYBE_TAINT_LINE(io, sv) \ | |
1743 | if (!(IoFLAGS(io) & IOf_UNTAINT)) { \ | |
1744 | TAINT; \ | |
1745 | SvTAINTED_on(sv); \ | |
1746 | } | |
1747 | ||
684bef36 | 1748 | /* delay EOF state for a snarfed empty file */ |
fbad3eb5 | 1749 | #define SNARF_EOF(gimme,rs,io,sv) \ |
684bef36 | 1750 | (gimme != G_SCALAR || SvCUR(sv) \ |
b9fee9ba | 1751 | || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs)) |
fbad3eb5 | 1752 | |
a0d0e21e | 1753 | for (;;) { |
09e8efcc | 1754 | PUTBACK; |
fbad3eb5 | 1755 | if (!sv_gets(sv, fp, offset) |
2d726892 TF |
1756 | && (type == OP_GLOB |
1757 | || SNARF_EOF(gimme, PL_rs, io, sv) | |
1758 | || PerlIO_error(fp))) | |
fbad3eb5 | 1759 | { |
760ac839 | 1760 | PerlIO_clearerr(fp); |
a0d0e21e | 1761 | if (IoFLAGS(io) & IOf_ARGV) { |
3280af22 | 1762 | fp = nextargv(PL_last_in_gv); |
a0d0e21e LW |
1763 | if (fp) |
1764 | continue; | |
3280af22 | 1765 | (void)do_close(PL_last_in_gv, FALSE); |
a0d0e21e LW |
1766 | } |
1767 | else if (type == OP_GLOB) { | |
a2a5de95 NC |
1768 | if (!do_close(PL_last_in_gv, FALSE)) { |
1769 | Perl_ck_warner(aTHX_ packWARN(WARN_GLOB), | |
1770 | "glob failed (child exited with status %d%s)", | |
1771 | (int)(STATUS_CURRENT >> 8), | |
1772 | (STATUS_CURRENT & 0x80) ? ", core dumped" : ""); | |
4eb79ab5 | 1773 | } |
a0d0e21e | 1774 | } |
54310121 | 1775 | if (gimme == G_SCALAR) { |
ba92458f AE |
1776 | if (type != OP_RCATLINE) { |
1777 | SV_CHECK_THINKFIRST_COW_DROP(TARG); | |
0c34ef67 | 1778 | SvOK_off(TARG); |
ba92458f | 1779 | } |
09e8efcc | 1780 | SPAGAIN; |
a0d0e21e LW |
1781 | PUSHTARG; |
1782 | } | |
3887d568 | 1783 | MAYBE_TAINT_LINE(io, sv); |
a0d0e21e LW |
1784 | RETURN; |
1785 | } | |
3887d568 | 1786 | MAYBE_TAINT_LINE(io, sv); |
a0d0e21e | 1787 | IoLINES(io)++; |
b9fee9ba | 1788 | IoFLAGS(io) |= IOf_NOLINE; |
71be2cbc | 1789 | SvSETMAGIC(sv); |
09e8efcc | 1790 | SPAGAIN; |
a0d0e21e | 1791 | XPUSHs(sv); |
a0d0e21e | 1792 | if (type == OP_GLOB) { |
349d4f2f | 1793 | const char *t1; |
a0d0e21e | 1794 | |
3280af22 | 1795 | if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) { |
6136c704 | 1796 | char * const tmps = SvEND(sv) - 1; |
aa07b2f6 | 1797 | if (*tmps == *SvPVX_const(PL_rs)) { |
c07a80fd | 1798 | *tmps = '\0'; |
b162af07 | 1799 | SvCUR_set(sv, SvCUR(sv) - 1); |
c07a80fd | 1800 | } |
1801 | } | |
349d4f2f | 1802 | for (t1 = SvPVX_const(sv); *t1; t1++) |
937b2e03 | 1803 | if (!isALNUMC(*t1) && |
349d4f2f | 1804 | strchr("$&*(){}[]'\";\\|?<>~`", *t1)) |
a0d0e21e | 1805 | break; |
349d4f2f | 1806 | if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) { |
a0d0e21e LW |
1807 | (void)POPs; /* Unmatched wildcard? Chuck it... */ |
1808 | continue; | |
1809 | } | |
2d79bf7f | 1810 | } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */ |
d4c19fe8 AL |
1811 | if (ckWARN(WARN_UTF8)) { |
1812 | const U8 * const s = (const U8*)SvPVX_const(sv) + offset; | |
1813 | const STRLEN len = SvCUR(sv) - offset; | |
1814 | const U8 *f; | |
1815 | ||
1816 | if (!is_utf8_string_loc(s, len, &f)) | |
1817 | /* Emulate :encoding(utf8) warning in the same case. */ | |
1818 | Perl_warner(aTHX_ packWARN(WARN_UTF8), | |
1819 | "utf8 \"\\x%02X\" does not map to Unicode", | |
1820 | f < (U8*)SvEND(sv) ? *f : 0); | |
1821 | } | |
a0d0e21e | 1822 | } |
54310121 | 1823 | if (gimme == G_ARRAY) { |
a0d0e21e | 1824 | if (SvLEN(sv) - SvCUR(sv) > 20) { |
1da4ca5f | 1825 | SvPV_shrink_to_cur(sv); |
a0d0e21e | 1826 | } |
561b68a9 | 1827 | sv = sv_2mortal(newSV(80)); |
a0d0e21e LW |
1828 | continue; |
1829 | } | |
54310121 | 1830 | else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) { |
a0d0e21e | 1831 | /* try to reclaim a bit of scalar space (only on 1st alloc) */ |
d5b5861b NC |
1832 | const STRLEN new_len |
1833 | = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */ | |
1da4ca5f | 1834 | SvPV_renew(sv, new_len); |
a0d0e21e LW |
1835 | } |
1836 | RETURN; | |
1837 | } | |
1838 | } | |
1839 | ||
a0d0e21e LW |
1840 | PP(pp_helem) |
1841 | { | |
97aff369 | 1842 | dVAR; dSP; |
760ac839 | 1843 | HE* he; |
ae77835f | 1844 | SV **svp; |
c445ea15 | 1845 | SV * const keysv = POPs; |
85fbaab2 | 1846 | HV * const hv = MUTABLE_HV(POPs); |
a3b680e6 AL |
1847 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
1848 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
be6c24e0 | 1849 | SV *sv; |
92970b93 | 1850 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
d30e492c | 1851 | bool preeminent = TRUE; |
a0d0e21e | 1852 | |
d4c19fe8 | 1853 | if (SvTYPE(hv) != SVt_PVHV) |
a0d0e21e | 1854 | RETPUSHUNDEF; |
d4c19fe8 | 1855 | |
92970b93 | 1856 | if (localizing) { |
d4c19fe8 AL |
1857 | MAGIC *mg; |
1858 | HV *stash; | |
d30e492c VP |
1859 | |
1860 | /* If we can determine whether the element exist, | |
1861 | * Try to preserve the existenceness of a tied hash | |
1862 | * element by using EXISTS and DELETE if possible. | |
1863 | * Fallback to FETCH and STORE otherwise. */ | |
2c5f48c2 | 1864 | if (SvCANEXISTDELETE(hv)) |
d30e492c | 1865 | preeminent = hv_exists_ent(hv, keysv, 0); |
d4c19fe8 | 1866 | } |
d30e492c | 1867 | |
5f9d7e2b | 1868 | he = hv_fetch_ent(hv, keysv, lval && !defer, 0); |
d4c19fe8 | 1869 | svp = he ? &HeVAL(he) : NULL; |
a0d0e21e | 1870 | if (lval) { |
746f6409 | 1871 | if (!svp || !*svp || *svp == &PL_sv_undef) { |
68dc0745 | 1872 | SV* lv; |
1873 | SV* key2; | |
2d8e6c8d | 1874 | if (!defer) { |
be2597df | 1875 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); |
2d8e6c8d | 1876 | } |
68dc0745 | 1877 | lv = sv_newmortal(); |
1878 | sv_upgrade(lv, SVt_PVLV); | |
1879 | LvTYPE(lv) = 'y'; | |
6136c704 | 1880 | sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0); |
68dc0745 | 1881 | SvREFCNT_dec(key2); /* sv_magic() increments refcount */ |
b37c2d43 | 1882 | LvTARG(lv) = SvREFCNT_inc_simple(hv); |
68dc0745 | 1883 | LvTARGLEN(lv) = 1; |
1884 | PUSHs(lv); | |
1885 | RETURN; | |
1886 | } | |
92970b93 | 1887 | if (localizing) { |
bfcb3514 | 1888 | if (HvNAME_get(hv) && isGV(*svp)) |
159b6efe | 1889 | save_gp(MUTABLE_GV(*svp), !(PL_op->op_flags & OPf_SPECIAL)); |
47cfc530 VP |
1890 | else if (preeminent) |
1891 | save_helem_flags(hv, keysv, svp, | |
1892 | (PL_op->op_flags & OPf_SPECIAL) ? 0 : SAVEf_SETMAGIC); | |
1893 | else | |
1894 | SAVEHDELETE(hv, keysv); | |
5f05dabc | 1895 | } |
9026059d GG |
1896 | else if (PL_op->op_private & OPpDEREF) { |
1897 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
1898 | RETURN; | |
1899 | } | |
a0d0e21e | 1900 | } |
746f6409 | 1901 | sv = (svp && *svp ? *svp : &PL_sv_undef); |
fd69380d DM |
1902 | /* Originally this did a conditional C<sv = sv_mortalcopy(sv)>; this |
1903 | * was to make C<local $tied{foo} = $tied{foo}> possible. | |
1904 | * However, it seems no longer to be needed for that purpose, and | |
1905 | * introduced a new bug: stuff like C<while ($hash{taintedval} =~ /.../g> | |
1906 | * would loop endlessly since the pos magic is getting set on the | |
1907 | * mortal copy and lost. However, the copy has the effect of | |
1908 | * triggering the get magic, and losing it altogether made things like | |
1909 | * c<$tied{foo};> in void context no longer do get magic, which some | |
1910 | * code relied on. Also, delayed triggering of magic on @+ and friends | |
1911 | * meant the original regex may be out of scope by now. So as a | |
1912 | * compromise, do the get magic here. (The MGf_GSKIP flag will stop it | |
1913 | * being called too many times). */ | |
39cf747a | 1914 | if (!lval && SvRMAGICAL(hv) && SvGMAGICAL(sv)) |
fd69380d | 1915 | mg_get(sv); |
be6c24e0 | 1916 | PUSHs(sv); |
a0d0e21e LW |
1917 | RETURN; |
1918 | } | |
1919 | ||
a0d0e21e LW |
1920 | PP(pp_iter) |
1921 | { | |
97aff369 | 1922 | dVAR; dSP; |
eb578fdb | 1923 | PERL_CONTEXT *cx; |
7d6c2cef | 1924 | SV *oldsv; |
1d7c1841 | 1925 | SV **itersvp; |
a0d0e21e | 1926 | |
924508f0 | 1927 | EXTEND(SP, 1); |
a0d0e21e | 1928 | cx = &cxstack[cxstack_ix]; |
1d7c1841 | 1929 | itersvp = CxITERVAR(cx); |
a48ce6be DM |
1930 | |
1931 | switch (CxTYPE(cx)) { | |
17c91640 | 1932 | |
b552b52c DM |
1933 | case CXt_LOOP_LAZYSV: /* string increment */ |
1934 | { | |
1935 | SV* cur = cx->blk_loop.state_u.lazysv.cur; | |
1936 | SV *end = cx->blk_loop.state_u.lazysv.end; | |
1937 | /* If the maximum is !SvOK(), pp_enteriter substitutes PL_sv_no. | |
1938 | It has SvPVX of "" and SvCUR of 0, which is what we want. */ | |
1939 | STRLEN maxlen = 0; | |
1940 | const char *max = SvPV_const(end, maxlen); | |
1941 | if (SvNIOK(cur) || SvCUR(cur) > maxlen) | |
1942 | RETPUSHNO; | |
1943 | ||
1944 | oldsv = *itersvp; | |
1945 | if (SvREFCNT(oldsv) == 1 && !SvMAGICAL(oldsv)) { | |
1946 | /* safe to reuse old SV */ | |
1947 | sv_setsv(oldsv, cur); | |
a48ce6be | 1948 | } |
b552b52c DM |
1949 | else |
1950 | { | |
1951 | /* we need a fresh SV every time so that loop body sees a | |
1952 | * completely new SV for closures/references to work as | |
1953 | * they used to */ | |
1954 | *itersvp = newSVsv(cur); | |
1955 | SvREFCNT_dec(oldsv); | |
1956 | } | |
1957 | if (strEQ(SvPVX_const(cur), max)) | |
1958 | sv_setiv(cur, 0); /* terminate next time */ | |
1959 | else | |
1960 | sv_inc(cur); | |
1961 | break; | |
1962 | } | |
a48ce6be | 1963 | |
fcef60b4 DM |
1964 | case CXt_LOOP_LAZYIV: /* integer increment */ |
1965 | { | |
1966 | IV cur = cx->blk_loop.state_u.lazyiv.cur; | |
1967 | if (cur > cx->blk_loop.state_u.lazyiv.end) | |
89ea2908 | 1968 | RETPUSHNO; |
7f61b687 | 1969 | |
fcef60b4 | 1970 | oldsv = *itersvp; |
3db8f154 | 1971 | /* don't risk potential race */ |
fcef60b4 | 1972 | if (SvREFCNT(oldsv) == 1 && !SvMAGICAL(oldsv)) { |
eaa5c2d6 | 1973 | /* safe to reuse old SV */ |
fcef60b4 | 1974 | sv_setiv(oldsv, cur); |
eaa5c2d6 | 1975 | } |
1c846c1f | 1976 | else |
eaa5c2d6 GA |
1977 | { |
1978 | /* we need a fresh SV every time so that loop body sees a | |
1979 | * completely new SV for closures/references to work as they | |
1980 | * used to */ | |
fcef60b4 | 1981 | *itersvp = newSViv(cur); |
dc09a129 | 1982 | SvREFCNT_dec(oldsv); |
eaa5c2d6 | 1983 | } |
a2309040 | 1984 | |
fcef60b4 | 1985 | if (cur == IV_MAX) { |
cdc1aa42 NC |
1986 | /* Handle end of range at IV_MAX */ |
1987 | cx->blk_loop.state_u.lazyiv.end = IV_MIN; | |
1988 | } else | |
1989 | ++cx->blk_loop.state_u.lazyiv.cur; | |
a48ce6be | 1990 | break; |
fcef60b4 | 1991 | } |
a48ce6be | 1992 | |
b552b52c | 1993 | case CXt_LOOP_FOR: /* iterate array */ |
7d6c2cef | 1994 | { |
89ea2908 | 1995 | |
7d6c2cef DM |
1996 | AV *av = cx->blk_loop.state_u.ary.ary; |
1997 | SV *sv; | |
1998 | bool av_is_stack = FALSE; | |
a8a20bb6 | 1999 | IV ix; |
7d6c2cef | 2000 | |
de080daa DM |
2001 | if (!av) { |
2002 | av_is_stack = TRUE; | |
2003 | av = PL_curstack; | |
2004 | } | |
2005 | if (PL_op->op_private & OPpITER_REVERSED) { | |
a8a20bb6 DM |
2006 | ix = --cx->blk_loop.state_u.ary.ix; |
2007 | if (ix <= (av_is_stack ? cx->blk_loop.resetsp : -1)) | |
de080daa | 2008 | RETPUSHNO; |
de080daa DM |
2009 | } |
2010 | else { | |
a8a20bb6 DM |
2011 | ix = ++cx->blk_loop.state_u.ary.ix; |
2012 | if (ix > (av_is_stack ? cx->blk_oldsp : AvFILL(av))) | |
de080daa | 2013 | RETPUSHNO; |
a8a20bb6 | 2014 | } |
de080daa | 2015 | |
a8a20bb6 DM |
2016 | if (SvMAGICAL(av) || AvREIFY(av)) { |
2017 | SV * const * const svp = av_fetch(av, ix, FALSE); | |
2018 | sv = svp ? *svp : NULL; | |
2019 | } | |
2020 | else { | |
2021 | sv = AvARRAY(av)[ix]; | |
de080daa | 2022 | } |
ef3e5ea9 | 2023 | |
de080daa | 2024 | if (sv) { |
f38aa882 DM |
2025 | if (SvIS_FREED(sv)) { |
2026 | *itersvp = NULL; | |
2027 | Perl_croak(aTHX_ "Use of freed value in iteration"); | |
2028 | } | |
de080daa DM |
2029 | SvTEMP_off(sv); |
2030 | SvREFCNT_inc_simple_void_NN(sv); | |
2031 | } | |
2032 | else | |
2033 | sv = &PL_sv_undef; | |
f38aa882 | 2034 | |
de080daa DM |
2035 | if (!av_is_stack && sv == &PL_sv_undef) { |
2036 | SV *lv = newSV_type(SVt_PVLV); | |
2037 | LvTYPE(lv) = 'y'; | |
2038 | sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0); | |
2039 | LvTARG(lv) = SvREFCNT_inc_simple(av); | |
f38aa882 | 2040 | LvTARGOFF(lv) = ix; |
de080daa DM |
2041 | LvTARGLEN(lv) = (STRLEN)UV_MAX; |
2042 | sv = lv; | |
2043 | } | |
a0d0e21e | 2044 | |
de080daa DM |
2045 | oldsv = *itersvp; |
2046 | *itersvp = sv; | |
2047 | SvREFCNT_dec(oldsv); | |
de080daa | 2048 | break; |
7d6c2cef | 2049 | } |
a48ce6be DM |
2050 | |
2051 | default: | |
2052 | DIE(aTHX_ "panic: pp_iter, type=%u", CxTYPE(cx)); | |
2053 | } | |
b552b52c | 2054 | RETPUSHYES; |
a0d0e21e LW |
2055 | } |
2056 | ||
ef07e810 DM |
2057 | /* |
2058 | A description of how taint works in pattern matching and substitution. | |
2059 | ||
284167a5 S |
2060 | This is all conditional on NO_TAINT_SUPPORT not being defined. Under |
2061 | NO_TAINT_SUPPORT, taint-related operations should become no-ops. | |
2062 | ||
4e19c54b | 2063 | While the pattern is being assembled/concatenated and then compiled, |
284167a5 S |
2064 | PL_tainted will get set (via TAINT_set) if any component of the pattern |
2065 | is tainted, e.g. /.*$tainted/. At the end of pattern compilation, | |
2066 | the RXf_TAINTED flag is set on the pattern if PL_tainted is set (via | |
2067 | TAINT_get). | |
ef07e810 | 2068 | |
0ab462a6 DM |
2069 | When the pattern is copied, e.g. $r = qr/..../, the SV holding the ref to |
2070 | the pattern is marked as tainted. This means that subsequent usage, such | |
284167a5 S |
2071 | as /x$r/, will set PL_tainted using TAINT_set, and thus RXf_TAINTED, |
2072 | on the new pattern too. | |
ef07e810 DM |
2073 | |
2074 | During execution of a pattern, locale-variant ops such as ALNUML set the | |
2075 | local flag RF_tainted. At the end of execution, the engine sets the | |
0ab462a6 DM |
2076 | RXf_TAINTED_SEEN on the pattern if RF_tainted got set, or clears it |
2077 | otherwise. | |
ef07e810 DM |
2078 | |
2079 | In addition, RXf_TAINTED_SEEN is used post-execution by the get magic code | |
2080 | of $1 et al to indicate whether the returned value should be tainted. | |
2081 | It is the responsibility of the caller of the pattern (i.e. pp_match, | |
2082 | pp_subst etc) to set this flag for any other circumstances where $1 needs | |
2083 | to be tainted. | |
2084 | ||
2085 | The taint behaviour of pp_subst (and pp_substcont) is quite complex. | |
2086 | ||
2087 | There are three possible sources of taint | |
2088 | * the source string | |
2089 | * the pattern (both compile- and run-time, RXf_TAINTED / RXf_TAINTED_SEEN) | |
2090 | * the replacement string (or expression under /e) | |
2091 | ||
2092 | There are four destinations of taint and they are affected by the sources | |
2093 | according to the rules below: | |
2094 | ||
2095 | * the return value (not including /r): | |
2096 | tainted by the source string and pattern, but only for the | |
2097 | number-of-iterations case; boolean returns aren't tainted; | |
2098 | * the modified string (or modified copy under /r): | |
2099 | tainted by the source string, pattern, and replacement strings; | |
2100 | * $1 et al: | |
2101 | tainted by the pattern, and under 'use re "taint"', by the source | |
2102 | string too; | |
2103 | * PL_taint - i.e. whether subsequent code (e.g. in a /e block) is tainted: | |
2104 | should always be unset before executing subsequent code. | |
2105 | ||
2106 | The overall action of pp_subst is: | |
2107 | ||
2108 | * at the start, set bits in rxtainted indicating the taint status of | |
2109 | the various sources. | |
2110 | ||
2111 | * After each pattern execution, update the SUBST_TAINT_PAT bit in | |
2112 | rxtainted if RXf_TAINTED_SEEN has been set, to indicate that the | |
2113 | pattern has subsequently become tainted via locale ops. | |
2114 | ||
2115 | * If control is being passed to pp_substcont to execute a /e block, | |
2116 | save rxtainted in the CXt_SUBST block, for future use by | |
2117 | pp_substcont. | |
2118 | ||
2119 | * Whenever control is being returned to perl code (either by falling | |
2120 | off the "end" of pp_subst/pp_substcont, or by entering a /e block), | |
2121 | use the flag bits in rxtainted to make all the appropriate types of | |
0ab462a6 DM |
2122 | destination taint visible; e.g. set RXf_TAINTED_SEEN so that $1 |
2123 | et al will appear tainted. | |
ef07e810 DM |
2124 | |
2125 | pp_match is just a simpler version of the above. | |
2126 | ||
2127 | */ | |
2128 | ||
a0d0e21e LW |
2129 | PP(pp_subst) |
2130 | { | |
97aff369 | 2131 | dVAR; dSP; dTARG; |
eb578fdb | 2132 | PMOP *pm = cPMOP; |
a0d0e21e | 2133 | PMOP *rpm = pm; |
eb578fdb | 2134 | char *s; |
a0d0e21e | 2135 | char *strend; |
eb578fdb | 2136 | char *m; |
5c144d81 | 2137 | const char *c; |
eb578fdb | 2138 | char *d; |
a0d0e21e LW |
2139 | STRLEN clen; |
2140 | I32 iters = 0; | |
2141 | I32 maxiters; | |
eb578fdb | 2142 | I32 i; |
a0d0e21e | 2143 | bool once; |
ef07e810 DM |
2144 | U8 rxtainted = 0; /* holds various SUBST_TAINT_* flag bits. |
2145 | See "how taint works" above */ | |
a0d0e21e | 2146 | char *orig; |
1ed74d04 | 2147 | U8 r_flags; |
eb578fdb | 2148 | REGEXP *rx = PM_GETRE(pm); |
a0d0e21e LW |
2149 | STRLEN len; |
2150 | int force_on_match = 0; | |
0bcc34c2 | 2151 | const I32 oldsave = PL_savestack_ix; |
792b2c16 | 2152 | STRLEN slen; |
26a74523 | 2153 | bool doutf8 = FALSE; /* whether replacement is in utf8 */ |
f8c7b90f | 2154 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2155 | bool is_cow; |
2156 | #endif | |
a0714e2c | 2157 | SV *nsv = NULL; |
b770e143 | 2158 | /* known replacement string? */ |
eb578fdb | 2159 | SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL; |
a0d0e21e | 2160 | |
f410a211 NC |
2161 | PERL_ASYNC_CHECK(); |
2162 | ||
533c011a | 2163 | if (PL_op->op_flags & OPf_STACKED) |
a0d0e21e | 2164 | TARG = POPs; |
59f00321 RGS |
2165 | else if (PL_op->op_private & OPpTARGET_MY) |
2166 | GETTARGET; | |
a0d0e21e | 2167 | else { |
54b9620d | 2168 | TARG = DEFSV; |
a0d0e21e | 2169 | EXTEND(SP,1); |
1c846c1f | 2170 | } |
d9f424b2 | 2171 | |
64534138 | 2172 | SvGETMAGIC(TARG); /* must come before cow check */ |
f8c7b90f | 2173 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2174 | /* Awooga. Awooga. "bool" types that are actually char are dangerous, |
2175 | because they make integers such as 256 "false". */ | |
2176 | is_cow = SvIsCOW(TARG) ? TRUE : FALSE; | |
2177 | #else | |
765f542d NC |
2178 | if (SvIsCOW(TARG)) |
2179 | sv_force_normal_flags(TARG,0); | |
ed252734 | 2180 | #endif |
8ca8a454 | 2181 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT) |
f8c7b90f | 2182 | #ifdef PERL_OLD_COPY_ON_WRITE |
8ca8a454 | 2183 | && !is_cow |
ed252734 | 2184 | #endif |
8ca8a454 NC |
2185 | && (SvREADONLY(TARG) |
2186 | || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG)) | |
2187 | || SvTYPE(TARG) > SVt_PVLV) | |
2188 | && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))) | |
cb077ed2 | 2189 | Perl_croak_no_modify(); |
8ec5e241 NIS |
2190 | PUTBACK; |
2191 | ||
64534138 | 2192 | s = SvPV_nomg(TARG, len); |
4499db73 | 2193 | if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV || SvVOK(TARG)) |
a0d0e21e | 2194 | force_on_match = 1; |
20be6587 DM |
2195 | |
2196 | /* only replace once? */ | |
2197 | once = !(rpm->op_pmflags & PMf_GLOBAL); | |
2198 | ||
ef07e810 | 2199 | /* See "how taint works" above */ |
284167a5 | 2200 | if (TAINTING_get) { |
20be6587 DM |
2201 | rxtainted = ( |
2202 | (SvTAINTED(TARG) ? SUBST_TAINT_STR : 0) | |
284167a5 | 2203 | | (RX_ISTAINTED(rx) ? SUBST_TAINT_PAT : 0) |
20be6587 DM |
2204 | | ((pm->op_pmflags & PMf_RETAINT) ? SUBST_TAINT_RETAINT : 0) |
2205 | | ((once && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
2206 | ? SUBST_TAINT_BOOLRET : 0)); | |
2207 | TAINT_NOT; | |
2208 | } | |
a12c0f56 | 2209 | |
a30b2f1f | 2210 | RX_MATCH_UTF8_set(rx, DO_UTF8(TARG)); |
d9f424b2 | 2211 | |
a0d0e21e LW |
2212 | force_it: |
2213 | if (!pm || !s) | |
5637ef5b | 2214 | DIE(aTHX_ "panic: pp_subst, pm=%p, s=%p", pm, s); |
a0d0e21e LW |
2215 | |
2216 | strend = s + len; | |
a30b2f1f | 2217 | slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len; |
792b2c16 JH |
2218 | maxiters = 2 * slen + 10; /* We can match twice at each |
2219 | position, once with zero-length, | |
2220 | second time with non-zero. */ | |
a0d0e21e | 2221 | |
6a97c51d | 2222 | if (!RX_PRELEN(rx) && PL_curpm |
8d919b0a | 2223 | && !ReANY(rx)->mother_re) { |
3280af22 | 2224 | pm = PL_curpm; |
aaa362c4 | 2225 | rx = PM_GETRE(pm); |
a0d0e21e | 2226 | } |
6502e081 DM |
2227 | |
2228 | r_flags = ( RX_NPARENS(rx) | |
2229 | || PL_sawampersand | |
6502e081 DM |
2230 | || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
2231 | ) | |
2232 | ? REXEC_COPY_STR | |
2233 | : 0; | |
7fba1cd6 | 2234 | |
a0d0e21e | 2235 | orig = m = s; |
07bc277f | 2236 | if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT) { |
ee0b7718 | 2237 | PL_bostr = orig; |
f9f4320a | 2238 | s = CALLREG_INTUIT_START(rx, TARG, s, strend, r_flags, NULL); |
f722798b IZ |
2239 | |
2240 | if (!s) | |
df34c13a | 2241 | goto ret_no; |
f722798b | 2242 | /* How to do it in subst? */ |
07bc277f | 2243 | /* if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL) |
1c846c1f | 2244 | && !PL_sawampersand |
a91cc451 | 2245 | && !(RX_EXTFLAGS(rx) & RXf_KEEPCOPY)) |
f722798b IZ |
2246 | goto yup; |
2247 | */ | |
a0d0e21e | 2248 | } |
71be2cbc | 2249 | |
8b64c330 DM |
2250 | if (!CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL, |
2251 | r_flags | REXEC_CHECKED)) | |
2252 | { | |
5e79dfb9 DM |
2253 | ret_no: |
2254 | SPAGAIN; | |
2255 | PUSHs(rpm->op_pmflags & PMf_NONDESTRUCT ? TARG : &PL_sv_no); | |
2256 | LEAVE_SCOPE(oldsave); | |
2257 | RETURN; | |
2258 | } | |
2259 | ||
1754320d FC |
2260 | PL_curpm = pm; |
2261 | ||
71be2cbc | 2262 | /* known replacement string? */ |
f272994b | 2263 | if (dstr) { |
8514a05a JH |
2264 | /* replacement needing upgrading? */ |
2265 | if (DO_UTF8(TARG) && !doutf8) { | |
db79b45b | 2266 | nsv = sv_newmortal(); |
4a176938 | 2267 | SvSetSV(nsv, dstr); |
8514a05a JH |
2268 | if (PL_encoding) |
2269 | sv_recode_to_utf8(nsv, PL_encoding); | |
2270 | else | |
2271 | sv_utf8_upgrade(nsv); | |
5c144d81 | 2272 | c = SvPV_const(nsv, clen); |
4a176938 JH |
2273 | doutf8 = TRUE; |
2274 | } | |
2275 | else { | |
5c144d81 | 2276 | c = SvPV_const(dstr, clen); |
4a176938 | 2277 | doutf8 = DO_UTF8(dstr); |
8514a05a | 2278 | } |
bb933b9b FC |
2279 | |
2280 | if (SvTAINTED(dstr)) | |
2281 | rxtainted |= SUBST_TAINT_REPL; | |
f272994b A |
2282 | } |
2283 | else { | |
6136c704 | 2284 | c = NULL; |
f272994b A |
2285 | doutf8 = FALSE; |
2286 | } | |
2287 | ||
71be2cbc | 2288 | /* can do inplace substitution? */ |
ed252734 | 2289 | if (c |
f8c7b90f | 2290 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2291 | && !is_cow |
2292 | #endif | |
fbfb1899 DM |
2293 | && (I32)clen <= RX_MINLENRET(rx) |
2294 | && (once || !(r_flags & REXEC_COPY_STR)) | |
1754320d | 2295 | && !(RX_EXTFLAGS(rx) & (RXf_LOOKBEHIND_SEEN|RXf_MODIFIES_VARS)) |
8ca8a454 NC |
2296 | && (!doutf8 || SvUTF8(TARG)) |
2297 | && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
8b030b38 | 2298 | { |
ec911639 | 2299 | |
f8c7b90f | 2300 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2301 | if (SvIsCOW(TARG)) { |
2302 | assert (!force_on_match); | |
2303 | goto have_a_cow; | |
2304 | } | |
2305 | #endif | |
71be2cbc | 2306 | if (force_on_match) { |
2307 | force_on_match = 0; | |
5c1648b0 | 2308 | s = SvPV_force_nomg(TARG, len); |
71be2cbc | 2309 | goto force_it; |
2310 | } | |
71be2cbc | 2311 | d = s; |
71be2cbc | 2312 | if (once) { |
20be6587 DM |
2313 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
2314 | rxtainted |= SUBST_TAINT_PAT; | |
07bc277f NC |
2315 | m = orig + RX_OFFS(rx)[0].start; |
2316 | d = orig + RX_OFFS(rx)[0].end; | |
71be2cbc | 2317 | s = orig; |
2318 | if (m - s > strend - d) { /* faster to shorten from end */ | |
2319 | if (clen) { | |
2320 | Copy(c, m, clen, char); | |
2321 | m += clen; | |
a0d0e21e | 2322 | } |
71be2cbc | 2323 | i = strend - d; |
2324 | if (i > 0) { | |
2325 | Move(d, m, i, char); | |
2326 | m += i; | |
a0d0e21e | 2327 | } |
71be2cbc | 2328 | *m = '\0'; |
2329 | SvCUR_set(TARG, m - s); | |
2330 | } | |
155aba94 | 2331 | else if ((i = m - s)) { /* faster from front */ |
71be2cbc | 2332 | d -= clen; |
2333 | m = d; | |
0d3c21b0 | 2334 | Move(s, d - i, i, char); |
71be2cbc | 2335 | sv_chop(TARG, d-i); |
71be2cbc | 2336 | if (clen) |
2337 | Copy(c, m, clen, char); | |
2338 | } | |
2339 | else if (clen) { | |
2340 | d -= clen; | |
2341 | sv_chop(TARG, d); | |
2342 | Copy(c, d, clen, char); | |
2343 | } | |
2344 | else { | |
2345 | sv_chop(TARG, d); | |
2346 | } | |
8ec5e241 | 2347 | SPAGAIN; |
8ca8a454 | 2348 | PUSHs(&PL_sv_yes); |
71be2cbc | 2349 | } |
2350 | else { | |
71be2cbc | 2351 | do { |
2352 | if (iters++ > maxiters) | |
cea2e8a9 | 2353 | DIE(aTHX_ "Substitution loop"); |
20be6587 DM |
2354 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
2355 | rxtainted |= SUBST_TAINT_PAT; | |
07bc277f | 2356 | m = RX_OFFS(rx)[0].start + orig; |
155aba94 | 2357 | if ((i = m - s)) { |
71be2cbc | 2358 | if (s != d) |
2359 | Move(s, d, i, char); | |
2360 | d += i; | |
a0d0e21e | 2361 | } |
71be2cbc | 2362 | if (clen) { |
2363 | Copy(c, d, clen, char); | |
2364 | d += clen; | |
2365 | } | |
07bc277f | 2366 | s = RX_OFFS(rx)[0].end + orig; |
f9f4320a | 2367 | } while (CALLREGEXEC(rx, s, strend, orig, s == m, |
f722798b IZ |
2368 | TARG, NULL, |
2369 | /* don't match same null twice */ | |
2370 | REXEC_NOT_FIRST|REXEC_IGNOREPOS)); | |
71be2cbc | 2371 | if (s != d) { |
2372 | i = strend - s; | |
aa07b2f6 | 2373 | SvCUR_set(TARG, d - SvPVX_const(TARG) + i); |
71be2cbc | 2374 | Move(s, d, i+1, char); /* include the NUL */ |
a0d0e21e | 2375 | } |
8ec5e241 | 2376 | SPAGAIN; |
8ca8a454 | 2377 | mPUSHi((I32)iters); |
a0d0e21e LW |
2378 | } |
2379 | } | |
ff6e92e8 | 2380 | else { |
1754320d FC |
2381 | bool first; |
2382 | SV *repl; | |
a0d0e21e LW |
2383 | if (force_on_match) { |
2384 | force_on_match = 0; | |
0c1438a1 NC |
2385 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
2386 | /* I feel that it should be possible to avoid this mortal copy | |
2387 | given that the code below copies into a new destination. | |
2388 | However, I suspect it isn't worth the complexity of | |
2389 | unravelling the C<goto force_it> for the small number of | |
2390 | cases where it would be viable to drop into the copy code. */ | |
2391 | TARG = sv_2mortal(newSVsv(TARG)); | |
2392 | } | |
5c1648b0 | 2393 | s = SvPV_force_nomg(TARG, len); |
a0d0e21e LW |
2394 | goto force_it; |
2395 | } | |
f8c7b90f | 2396 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2397 | have_a_cow: |
2398 | #endif | |
20be6587 DM |
2399 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
2400 | rxtainted |= SUBST_TAINT_PAT; | |
1754320d | 2401 | repl = dstr; |
815dd406 | 2402 | dstr = newSVpvn_flags(m, s-m, SVs_TEMP | (DO_UTF8(TARG) ? SVf_UTF8 : 0)); |
a0d0e21e | 2403 | if (!c) { |
eb578fdb | 2404 | PERL_CONTEXT *cx; |
8ec5e241 | 2405 | SPAGAIN; |
20be6587 DM |
2406 | /* note that a whole bunch of local vars are saved here for |
2407 | * use by pp_substcont: here's a list of them in case you're | |
2408 | * searching for places in this sub that uses a particular var: | |
2409 | * iters maxiters r_flags oldsave rxtainted orig dstr targ | |
2410 | * s m strend rx once */ | |
a0d0e21e | 2411 | PUSHSUBST(cx); |
20e98b0f | 2412 | RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot); |
a0d0e21e | 2413 | } |
cf93c79d | 2414 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
1754320d | 2415 | first = TRUE; |
a0d0e21e LW |
2416 | do { |
2417 | if (iters++ > maxiters) | |
cea2e8a9 | 2418 | DIE(aTHX_ "Substitution loop"); |
20be6587 DM |
2419 | if (RX_MATCH_TAINTED(rx)) |
2420 | rxtainted |= SUBST_TAINT_PAT; | |
07bc277f | 2421 | if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) { |
a0d0e21e LW |
2422 | m = s; |
2423 | s = orig; | |
6502e081 | 2424 | assert(RX_SUBOFFSET(rx) == 0); |
07bc277f | 2425 | orig = RX_SUBBEG(rx); |
a0d0e21e LW |
2426 | s = orig + (m - s); |
2427 | strend = s + (strend - m); | |
2428 | } | |
07bc277f | 2429 | m = RX_OFFS(rx)[0].start + orig; |
64534138 | 2430 | sv_catpvn_nomg_maybeutf8(dstr, s, m - s, DO_UTF8(TARG)); |
07bc277f | 2431 | s = RX_OFFS(rx)[0].end + orig; |
1754320d FC |
2432 | if (first) { |
2433 | /* replacement already stringified */ | |
2434 | if (clen) | |
64534138 | 2435 | sv_catpvn_nomg_maybeutf8(dstr, c, clen, doutf8); |
1754320d FC |
2436 | first = FALSE; |
2437 | } | |
2438 | else { | |
1754320d FC |
2439 | if (PL_encoding) { |
2440 | if (!nsv) nsv = sv_newmortal(); | |
2441 | sv_copypv(nsv, repl); | |
2442 | if (!DO_UTF8(nsv)) sv_recode_to_utf8(nsv, PL_encoding); | |
2443 | sv_catsv(dstr, nsv); | |
2444 | } | |
2445 | else sv_catsv(dstr, repl); | |
bb933b9b FC |
2446 | if (SvTAINTED(repl)) |
2447 | rxtainted |= SUBST_TAINT_REPL; | |
1754320d | 2448 | } |
a0d0e21e LW |
2449 | if (once) |
2450 | break; | |
f9f4320a | 2451 | } while (CALLREGEXEC(rx, s, strend, orig, s == m, |
ffc61ed2 | 2452 | TARG, NULL, r_flags)); |
64534138 | 2453 | sv_catpvn_nomg_maybeutf8(dstr, s, strend - s, DO_UTF8(TARG)); |
748a9306 | 2454 | |
8ca8a454 NC |
2455 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
2456 | /* From here on down we're using the copy, and leaving the original | |
2457 | untouched. */ | |
2458 | TARG = dstr; | |
2459 | SPAGAIN; | |
2460 | PUSHs(dstr); | |
2461 | } else { | |
f8c7b90f | 2462 | #ifdef PERL_OLD_COPY_ON_WRITE |
8ca8a454 NC |
2463 | /* The match may make the string COW. If so, brilliant, because |
2464 | that's just saved us one malloc, copy and free - the regexp has | |
2465 | donated the old buffer, and we malloc an entirely new one, rather | |
2466 | than the regexp malloc()ing a buffer and copying our original, | |
2467 | only for us to throw it away here during the substitution. */ | |
2468 | if (SvIsCOW(TARG)) { | |
2469 | sv_force_normal_flags(TARG, SV_COW_DROP_PV); | |
2470 | } else | |
ed252734 | 2471 | #endif |
8ca8a454 NC |
2472 | { |
2473 | SvPV_free(TARG); | |
2474 | } | |
2475 | SvPV_set(TARG, SvPVX(dstr)); | |
2476 | SvCUR_set(TARG, SvCUR(dstr)); | |
2477 | SvLEN_set(TARG, SvLEN(dstr)); | |
64534138 | 2478 | SvFLAGS(TARG) |= SvUTF8(dstr); |
8ca8a454 | 2479 | SvPV_set(dstr, NULL); |
748a9306 | 2480 | |
8ca8a454 | 2481 | SPAGAIN; |
4f4d7508 | 2482 | mPUSHi((I32)iters); |
8ca8a454 NC |
2483 | } |
2484 | } | |
2485 | ||
2486 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT)) { | |
2487 | (void)SvPOK_only_UTF8(TARG); | |
a0d0e21e | 2488 | } |
20be6587 | 2489 | |
ef07e810 | 2490 | /* See "how taint works" above */ |
284167a5 | 2491 | if (TAINTING_get) { |
20be6587 DM |
2492 | if ((rxtainted & SUBST_TAINT_PAT) || |
2493 | ((rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) == | |
2494 | (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) | |
2495 | ) | |
2496 | (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */ | |
2497 | ||
2498 | if (!(rxtainted & SUBST_TAINT_BOOLRET) | |
2499 | && (rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT)) | |
2500 | ) | |
2501 | SvTAINTED_on(TOPs); /* taint return value */ | |
2502 | else | |
2503 | SvTAINTED_off(TOPs); /* may have got tainted earlier */ | |
2504 | ||
2505 | /* needed for mg_set below */ | |
284167a5 S |
2506 | TAINT_set( |
2507 | cBOOL(rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)) | |
2508 | ); | |
20be6587 DM |
2509 | SvTAINT(TARG); |
2510 | } | |
2511 | SvSETMAGIC(TARG); /* PL_tainted must be correctly set for this mg_set */ | |
2512 | TAINT_NOT; | |
f1a76097 DM |
2513 | LEAVE_SCOPE(oldsave); |
2514 | RETURN; | |
a0d0e21e LW |
2515 | } |
2516 | ||
2517 | PP(pp_grepwhile) | |
2518 | { | |
27da23d5 | 2519 | dVAR; dSP; |
a0d0e21e LW |
2520 | |
2521 | if (SvTRUEx(POPs)) | |
3280af22 NIS |
2522 | PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr]; |
2523 | ++*PL_markstack_ptr; | |
b2a2a901 | 2524 | FREETMPS; |
d343c3ef | 2525 | LEAVE_with_name("grep_item"); /* exit inner scope */ |
a0d0e21e LW |
2526 | |
2527 | /* All done yet? */ | |
3280af22 | 2528 | if (PL_stack_base + *PL_markstack_ptr > SP) { |
a0d0e21e | 2529 | I32 items; |
c4420975 | 2530 | const I32 gimme = GIMME_V; |
a0d0e21e | 2531 | |
d343c3ef | 2532 | LEAVE_with_name("grep"); /* exit outer scope */ |
a0d0e21e | 2533 | (void)POPMARK; /* pop src */ |
3280af22 | 2534 | items = --*PL_markstack_ptr - PL_markstack_ptr[-1]; |
a0d0e21e | 2535 | (void)POPMARK; /* pop dst */ |
3280af22 | 2536 | SP = PL_stack_base + POPMARK; /* pop original mark */ |
54310121 | 2537 | if (gimme == G_SCALAR) { |
7cc47870 | 2538 | if (PL_op->op_private & OPpGREP_LEX) { |
c4420975 | 2539 | SV* const sv = sv_newmortal(); |
7cc47870 RGS |
2540 | sv_setiv(sv, items); |
2541 | PUSHs(sv); | |
2542 | } | |
2543 | else { | |
2544 | dTARGET; | |
2545 | XPUSHi(items); | |
2546 | } | |
a0d0e21e | 2547 | } |
54310121 | 2548 | else if (gimme == G_ARRAY) |
2549 | SP += items; | |
a0d0e21e LW |
2550 | RETURN; |
2551 | } | |
2552 | else { | |
2553 | SV *src; | |
2554 | ||
d343c3ef | 2555 | ENTER_with_name("grep_item"); /* enter inner scope */ |
1d7c1841 | 2556 | SAVEVPTR(PL_curpm); |
a0d0e21e | 2557 | |
3280af22 | 2558 | src = PL_stack_base[*PL_markstack_ptr]; |
a0d0e21e | 2559 | SvTEMP_off(src); |
59f00321 RGS |
2560 | if (PL_op->op_private & OPpGREP_LEX) |
2561 | PAD_SVl(PL_op->op_targ) = src; | |
2562 | else | |
414bf5ae | 2563 | DEFSV_set(src); |
a0d0e21e LW |
2564 | |
2565 | RETURNOP(cLOGOP->op_other); | |
2566 | } | |
2567 | } | |
2568 | ||
2569 | PP(pp_leavesub) | |
2570 | { | |
27da23d5 | 2571 | dVAR; dSP; |
a0d0e21e LW |
2572 | SV **mark; |
2573 | SV **newsp; | |
2574 | PMOP *newpm; | |
2575 | I32 gimme; | |
eb578fdb | 2576 | PERL_CONTEXT *cx; |
b0d9ce38 | 2577 | SV *sv; |
a0d0e21e | 2578 | |
9850bf21 RH |
2579 | if (CxMULTICALL(&cxstack[cxstack_ix])) |
2580 | return 0; | |
2581 | ||
a0d0e21e | 2582 | POPBLOCK(cx,newpm); |
5dd42e15 | 2583 | cxstack_ix++; /* temporarily protect top context */ |
1c846c1f | 2584 | |
a1f49e72 | 2585 | TAINT_NOT; |
a0d0e21e LW |
2586 | if (gimme == G_SCALAR) { |
2587 | MARK = newsp + 1; | |
a29cdaf0 | 2588 | if (MARK <= SP) { |
a8bba7fa | 2589 | if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) { |
6f48390a FC |
2590 | if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1 |
2591 | && !SvMAGICAL(TOPs)) { | |
a29cdaf0 IZ |
2592 | *MARK = SvREFCNT_inc(TOPs); |
2593 | FREETMPS; | |
2594 | sv_2mortal(*MARK); | |
cd06dffe GS |
2595 | } |
2596 | else { | |
959e3673 | 2597 | sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */ |
a29cdaf0 | 2598 | FREETMPS; |
959e3673 GS |
2599 | *MARK = sv_mortalcopy(sv); |
2600 | SvREFCNT_dec(sv); | |
a29cdaf0 | 2601 | } |
cd06dffe | 2602 | } |
6f48390a FC |
2603 | else if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1 |
2604 | && !SvMAGICAL(TOPs)) { | |
767eda44 | 2605 | *MARK = TOPs; |
767eda44 | 2606 | } |
cd06dffe | 2607 | else |
767eda44 | 2608 | *MARK = sv_mortalcopy(TOPs); |
cd06dffe GS |
2609 | } |
2610 | else { | |
f86702cc | 2611 | MEXTEND(MARK, 0); |
3280af22 | 2612 | *MARK = &PL_sv_undef; |
a0d0e21e LW |
2613 | } |
2614 | SP = MARK; | |
2615 | } | |
54310121 | 2616 | else if (gimme == G_ARRAY) { |
f86702cc | 2617 | for (MARK = newsp + 1; MARK <= SP; MARK++) { |
6f48390a FC |
2618 | if (!SvTEMP(*MARK) || SvREFCNT(*MARK) != 1 |
2619 | || SvMAGICAL(*MARK)) { | |
f86702cc | 2620 | *MARK = sv_mortalcopy(*MARK); |
a1f49e72 CS |
2621 | TAINT_NOT; /* Each item is independent */ |
2622 | } | |
f86702cc | 2623 | } |
a0d0e21e | 2624 | } |
f86702cc | 2625 | PUTBACK; |
1c846c1f | 2626 | |
a57c6685 | 2627 | LEAVE; |
5dd42e15 | 2628 | cxstack_ix--; |
b0d9ce38 | 2629 | POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */ |
3280af22 | 2630 | PL_curpm = newpm; /* ... and pop $1 et al */ |
a0d0e21e | 2631 | |
b0d9ce38 | 2632 | LEAVESUB(sv); |
f39bc417 | 2633 | return cx->blk_sub.retop; |
a0d0e21e LW |
2634 | } |
2635 | ||
2636 | PP(pp_entersub) | |
2637 | { | |
27da23d5 | 2638 | dVAR; dSP; dPOPss; |
a0d0e21e | 2639 | GV *gv; |
eb578fdb KW |
2640 | CV *cv; |
2641 | PERL_CONTEXT *cx; | |
5d94fbed | 2642 | I32 gimme; |
a9c4fd4e | 2643 | const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0; |
a0d0e21e LW |
2644 | |
2645 | if (!sv) | |
cea2e8a9 | 2646 | DIE(aTHX_ "Not a CODE reference"); |
a0d0e21e | 2647 | switch (SvTYPE(sv)) { |
f1025168 NC |
2648 | /* This is overwhelming the most common case: */ |
2649 | case SVt_PVGV: | |
13be902c | 2650 | we_have_a_glob: |
159b6efe | 2651 | if (!(cv = GvCVu((const GV *)sv))) { |
f730a42d | 2652 | HV *stash; |
f2c0649b | 2653 | cv = sv_2cv(sv, &stash, &gv, 0); |
f730a42d | 2654 | } |
f1025168 | 2655 | if (!cv) { |
a57c6685 | 2656 | ENTER; |
f1025168 NC |
2657 | SAVETMPS; |
2658 | goto try_autoload; | |
2659 | } | |
2660 | break; | |
13be902c FC |
2661 | case SVt_PVLV: |
2662 | if(isGV_with_GP(sv)) goto we_have_a_glob; | |
2663 | /*FALLTHROUGH*/ | |
a0d0e21e | 2664 | default: |
7c75014e DM |
2665 | if (sv == &PL_sv_yes) { /* unfound import, ignore */ |
2666 | if (hasargs) | |
2667 | SP = PL_stack_base + POPMARK; | |
4d198de3 DM |
2668 | else |
2669 | (void)POPMARK; | |
7c75014e DM |
2670 | RETURN; |
2671 | } | |
2672 | SvGETMAGIC(sv); | |
2673 | if (SvROK(sv)) { | |
93d7320b DM |
2674 | if (SvAMAGIC(sv)) { |
2675 | sv = amagic_deref_call(sv, to_cv_amg); | |
2676 | /* Don't SPAGAIN here. */ | |
2677 | } | |
7c75014e DM |
2678 | } |
2679 | else { | |
a9c4fd4e | 2680 | const char *sym; |
780a5241 | 2681 | STRLEN len; |
79a3e5ea | 2682 | if (!SvOK(sv)) |
cea2e8a9 | 2683 | DIE(aTHX_ PL_no_usym, "a subroutine"); |
79a3e5ea | 2684 | sym = SvPV_nomg_const(sv, len); |
533c011a | 2685 | if (PL_op->op_private & HINT_STRICT_REFS) |
b375e37b | 2686 | DIE(aTHX_ "Can't use string (\"%" SVf32 "\"%s) as a subroutine ref while \"strict refs\" in use", sv, len>32 ? "..." : ""); |
780a5241 | 2687 | cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv)); |
a0d0e21e LW |
2688 | break; |
2689 | } | |
ea726b52 | 2690 | cv = MUTABLE_CV(SvRV(sv)); |
a0d0e21e LW |
2691 | if (SvTYPE(cv) == SVt_PVCV) |
2692 | break; | |
2693 | /* FALL THROUGH */ | |
2694 | case SVt_PVHV: | |
2695 | case SVt_PVAV: | |
cea2e8a9 | 2696 | DIE(aTHX_ "Not a CODE reference"); |
f1025168 | 2697 | /* This is the second most common case: */ |
a0d0e21e | 2698 | case SVt_PVCV: |
ea726b52 | 2699 | cv = MUTABLE_CV(sv); |
a0d0e21e | 2700 | break; |
a0d0e21e LW |
2701 | } |
2702 | ||
a57c6685 | 2703 | ENTER; |
a0d0e21e LW |
2704 | SAVETMPS; |
2705 | ||
2706 | retry: | |
541ed3a9 FC |
2707 | if (CvCLONE(cv) && ! CvCLONED(cv)) |
2708 | DIE(aTHX_ "Closure prototype called"); | |
a0d0e21e | 2709 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
2f349aa0 NC |
2710 | GV* autogv; |
2711 | SV* sub_name; | |
2712 | ||
2713 | /* anonymous or undef'd function leaves us no recourse */ | |
7d2057d8 FC |
2714 | if (CvANON(cv) || !(gv = CvGV(cv))) { |
2715 | if (CvNAMED(cv)) | |
2716 | DIE(aTHX_ "Undefined subroutine &%"HEKf" called", | |
2717 | HEKfARG(CvNAME_HEK(cv))); | |
2f349aa0 | 2718 | DIE(aTHX_ "Undefined subroutine called"); |
7d2057d8 | 2719 | } |
2f349aa0 NC |
2720 | |
2721 | /* autoloaded stub? */ | |
2722 | if (cv != GvCV(gv)) { | |
2723 | cv = GvCV(gv); | |
2724 | } | |
2725 | /* should call AUTOLOAD now? */ | |
2726 | else { | |
7e623da3 | 2727 | try_autoload: |
d1089224 BF |
2728 | if ((autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), |
2729 | GvNAMEUTF8(gv) ? SVf_UTF8 : 0))) | |
2f349aa0 NC |
2730 | { |
2731 | cv = GvCV(autogv); | |
2732 | } | |
2f349aa0 | 2733 | else { |
c220e1a1 | 2734 | sorry: |
2f349aa0 | 2735 | sub_name = sv_newmortal(); |
6136c704 | 2736 | gv_efullname3(sub_name, gv, NULL); |
be2597df | 2737 | DIE(aTHX_ "Undefined subroutine &%"SVf" called", SVfARG(sub_name)); |
2f349aa0 NC |
2738 | } |
2739 | } | |
2740 | if (!cv) | |
c220e1a1 | 2741 | goto sorry; |
2f349aa0 | 2742 | goto retry; |
a0d0e21e LW |
2743 | } |
2744 | ||
54310121 | 2745 | gimme = GIMME_V; |
67caa1fe | 2746 | if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) { |
005a8a35 | 2747 | Perl_get_db_sub(aTHX_ &sv, cv); |
a9ef256d NC |
2748 | if (CvISXSUB(cv)) |
2749 | PL_curcopdb = PL_curcop; | |
1ad62f64 BR |
2750 | if (CvLVALUE(cv)) { |
2751 | /* check for lsub that handles lvalue subroutines */ | |
ae5c1e95 | 2752 | cv = GvCV(gv_HVadd(gv_fetchpvs("DB::lsub", GV_ADDMULTI, SVt_PVHV))); |
1ad62f64 BR |
2753 | /* if lsub not found then fall back to DB::sub */ |
2754 | if (!cv) cv = GvCV(PL_DBsub); | |
2755 | } else { | |
2756 | cv = GvCV(PL_DBsub); | |
2757 | } | |
a9ef256d | 2758 | |
ccafdc96 RGS |
2759 | if (!cv || (!CvXSUB(cv) && !CvSTART(cv))) |
2760 | DIE(aTHX_ "No DB::sub routine defined"); | |
67caa1fe | 2761 | } |
a0d0e21e | 2762 | |
aed2304a | 2763 | if (!(CvISXSUB(cv))) { |
f1025168 | 2764 | /* This path taken at least 75% of the time */ |
a0d0e21e | 2765 | dMARK; |
eb578fdb | 2766 | I32 items = SP - MARK; |
b70d5558 | 2767 | PADLIST * const padlist = CvPADLIST(cv); |
a0d0e21e LW |
2768 | PUSHBLOCK(cx, CXt_SUB, MARK); |
2769 | PUSHSUB(cx); | |
f39bc417 | 2770 | cx->blk_sub.retop = PL_op->op_next; |
a0d0e21e | 2771 | CvDEPTH(cv)++; |
3a76ca88 RGS |
2772 | if (CvDEPTH(cv) >= 2) { |
2773 | PERL_STACK_OVERFLOW_CHECK(); | |
2774 | pad_push(padlist, CvDEPTH(cv)); | |
a0d0e21e | 2775 | } |
3a76ca88 RGS |
2776 | SAVECOMPPAD(); |
2777 | PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); | |
2778 | if (hasargs) { | |
10533ace | 2779 | AV *const av = MUTABLE_AV(PAD_SVl(0)); |
221373f0 GS |
2780 | if (AvREAL(av)) { |
2781 | /* @_ is normally not REAL--this should only ever | |
2782 | * happen when DB::sub() calls things that modify @_ */ | |
2783 | av_clear(av); | |
2784 | AvREAL_off(av); | |
2785 | AvREIFY_on(av); | |
2786 | } | |
3280af22 | 2787 | cx->blk_sub.savearray = GvAV(PL_defgv); |
502c6561 | 2788 | GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av)); |
dd2155a4 | 2789 | CX_CURPAD_SAVE(cx->blk_sub); |
6d4ff0d2 | 2790 | cx->blk_sub.argarray = av; |
a0d0e21e LW |
2791 | ++MARK; |
2792 | ||
2793 | if (items > AvMAX(av) + 1) { | |
504618e9 | 2794 | SV **ary = AvALLOC(av); |
a0d0e21e LW |
2795 | if (AvARRAY(av) != ary) { |
2796 | AvMAX(av) += AvARRAY(av) - AvALLOC(av); | |
9c6bc640 | 2797 | AvARRAY(av) = ary; |
a0d0e21e LW |
2798 | } |
2799 | if (items > AvMAX(av) + 1) { | |
2800 | AvMAX(av) = items - 1; | |
2801 | Renew(ary,items,SV*); | |
2802 | AvALLOC(av) = ary; | |
9c6bc640 | 2803 | AvARRAY(av) = ary; |
a0d0e21e LW |
2804 | } |
2805 | } | |
2806 | Copy(MARK,AvARRAY(av),items,SV*); | |
93965878 | 2807 | AvFILLp(av) = items - 1; |
1c846c1f | 2808 | |
a0d0e21e LW |
2809 | while (items--) { |
2810 | if (*MARK) | |
2811 | SvTEMP_off(*MARK); | |
2812 | MARK++; | |
2813 | } | |
2814 | } | |
da1dff94 FC |
2815 | if ((cx->blk_u16 & OPpENTERSUB_LVAL_MASK) == OPpLVAL_INTRO && |
2816 | !CvLVALUE(cv)) | |
2817 | DIE(aTHX_ "Can't modify non-lvalue subroutine call"); | |
4a925ff6 GS |
2818 | /* warning must come *after* we fully set up the context |
2819 | * stuff so that __WARN__ handlers can safely dounwind() | |
2820 | * if they want to | |
2821 | */ | |
2b9dff67 | 2822 | if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION) |
4a925ff6 GS |
2823 | && !(PERLDB_SUB && cv == GvCV(PL_DBsub))) |
2824 | sub_crush_depth(cv); | |
a0d0e21e LW |
2825 | RETURNOP(CvSTART(cv)); |
2826 | } | |
f1025168 | 2827 | else { |
3a76ca88 | 2828 | I32 markix = TOPMARK; |
f1025168 | 2829 | |
3a76ca88 | 2830 | PUTBACK; |
f1025168 | 2831 | |
3a76ca88 RGS |
2832 | if (!hasargs) { |
2833 | /* Need to copy @_ to stack. Alternative may be to | |
2834 | * switch stack to @_, and copy return values | |
2835 | * back. This would allow popping @_ in XSUB, e.g.. XXXX */ | |
2836 | AV * const av = GvAV(PL_defgv); | |
2837 | const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */ | |
2838 | ||
2839 | if (items) { | |
2840 | /* Mark is at the end of the stack. */ | |
2841 | EXTEND(SP, items); | |
2842 | Copy(AvARRAY(av), SP + 1, items, SV*); | |
2843 | SP += items; | |
2844 | PUTBACK ; | |
2845 | } | |
2846 | } | |
2847 | /* We assume first XSUB in &DB::sub is the called one. */ | |
2848 | if (PL_curcopdb) { | |
2849 | SAVEVPTR(PL_curcop); | |
2850 | PL_curcop = PL_curcopdb; | |
2851 | PL_curcopdb = NULL; | |
2852 | } | |
2853 | /* Do we need to open block here? XXXX */ | |
72df79cf GF |
2854 | |
2855 | /* CvXSUB(cv) must not be NULL because newXS() refuses NULL xsub address */ | |
2856 | assert(CvXSUB(cv)); | |
16c91539 | 2857 | CvXSUB(cv)(aTHX_ cv); |
3a76ca88 RGS |
2858 | |
2859 | /* Enforce some sanity in scalar context. */ | |
2860 | if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) { | |
2861 | if (markix > PL_stack_sp - PL_stack_base) | |
2862 | *(PL_stack_base + markix) = &PL_sv_undef; | |
2863 | else | |
2864 | *(PL_stack_base + markix) = *PL_stack_sp; | |
2865 | PL_stack_sp = PL_stack_base + markix; | |
2866 | } | |
a57c6685 | 2867 | LEAVE; |
f1025168 NC |
2868 | return NORMAL; |
2869 | } | |
a0d0e21e LW |
2870 | } |
2871 | ||
44a8e56a | 2872 | void |
864dbfa3 | 2873 | Perl_sub_crush_depth(pTHX_ CV *cv) |
44a8e56a | 2874 | { |
7918f24d NC |
2875 | PERL_ARGS_ASSERT_SUB_CRUSH_DEPTH; |
2876 | ||
44a8e56a | 2877 | if (CvANON(cv)) |
9014280d | 2878 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine"); |
44a8e56a | 2879 | else { |
aec46f14 | 2880 | SV* const tmpstr = sv_newmortal(); |
6136c704 | 2881 | gv_efullname3(tmpstr, CvGV(cv), NULL); |
35c1215d | 2882 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"", |
be2597df | 2883 | SVfARG(tmpstr)); |
44a8e56a | 2884 | } |
2885 | } | |
2886 | ||
a0d0e21e LW |
2887 | PP(pp_aelem) |
2888 | { | |
97aff369 | 2889 | dVAR; dSP; |
a0d0e21e | 2890 | SV** svp; |
a3b680e6 | 2891 | SV* const elemsv = POPs; |
d804643f | 2892 | IV elem = SvIV(elemsv); |
502c6561 | 2893 | AV *const av = MUTABLE_AV(POPs); |
e1ec3a88 AL |
2894 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
2895 | const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av)); | |
4ad10a0b VP |
2896 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
2897 | bool preeminent = TRUE; | |
be6c24e0 | 2898 | SV *sv; |
a0d0e21e | 2899 | |
e35c1634 | 2900 | if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC)) |
95b63a38 JH |
2901 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
2902 | "Use of reference \"%"SVf"\" as array index", | |
be2597df | 2903 | SVfARG(elemsv)); |
a0d0e21e LW |
2904 | if (SvTYPE(av) != SVt_PVAV) |
2905 | RETPUSHUNDEF; | |
4ad10a0b VP |
2906 | |
2907 | if (localizing) { | |
2908 | MAGIC *mg; | |
2909 | HV *stash; | |
2910 | ||
2911 | /* If we can determine whether the element exist, | |
2912 | * Try to preserve the existenceness of a tied array | |
2913 | * element by using EXISTS and DELETE if possible. | |
2914 | * Fallback to FETCH and STORE otherwise. */ | |
2915 | if (SvCANEXISTDELETE(av)) | |
2916 | preeminent = av_exists(av, elem); | |
2917 | } | |
2918 | ||
68dc0745 | 2919 | svp = av_fetch(av, elem, lval && !defer); |
a0d0e21e | 2920 | if (lval) { |
2b573ace | 2921 | #ifdef PERL_MALLOC_WRAP |
2b573ace | 2922 | if (SvUOK(elemsv)) { |
a9c4fd4e | 2923 | const UV uv = SvUV(elemsv); |
2b573ace JH |
2924 | elem = uv > IV_MAX ? IV_MAX : uv; |
2925 | } | |
2926 | else if (SvNOK(elemsv)) | |
2927 | elem = (IV)SvNV(elemsv); | |
a3b680e6 AL |
2928 | if (elem > 0) { |
2929 | static const char oom_array_extend[] = | |
2930 | "Out of memory during array extend"; /* Duplicated in av.c */ | |
2b573ace | 2931 | MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend); |
a3b680e6 | 2932 | } |
2b573ace | 2933 | #endif |
3280af22 | 2934 | if (!svp || *svp == &PL_sv_undef) { |
68dc0745 | 2935 | SV* lv; |
2936 | if (!defer) | |
cea2e8a9 | 2937 | DIE(aTHX_ PL_no_aelem, elem); |
68dc0745 | 2938 | lv = sv_newmortal(); |
2939 | sv_upgrade(lv, SVt_PVLV); | |
2940 | LvTYPE(lv) = 'y'; | |
a0714e2c | 2941 | sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0); |
b37c2d43 | 2942 | LvTARG(lv) = SvREFCNT_inc_simple(av); |
68dc0745 | 2943 | LvTARGOFF(lv) = elem; |
2944 | LvTARGLEN(lv) = 1; | |
2945 | PUSHs(lv); | |
2946 | RETURN; | |
2947 | } | |
4ad10a0b VP |
2948 | if (localizing) { |
2949 | if (preeminent) | |
2950 | save_aelem(av, elem, svp); | |
2951 | else | |
2952 | SAVEADELETE(av, elem); | |
2953 | } | |
9026059d GG |
2954 | else if (PL_op->op_private & OPpDEREF) { |
2955 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
2956 | RETURN; | |
2957 | } | |
a0d0e21e | 2958 | } |
3280af22 | 2959 | sv = (svp ? *svp : &PL_sv_undef); |
39cf747a | 2960 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
fd69380d | 2961 | mg_get(sv); |
be6c24e0 | 2962 | PUSHs(sv); |
a0d0e21e LW |
2963 | RETURN; |
2964 | } | |
2965 | ||
9026059d | 2966 | SV* |
864dbfa3 | 2967 | Perl_vivify_ref(pTHX_ SV *sv, U32 to_what) |
02a9e968 | 2968 | { |
7918f24d NC |
2969 | PERL_ARGS_ASSERT_VIVIFY_REF; |
2970 | ||
5b295bef | 2971 | SvGETMAGIC(sv); |
02a9e968 CS |
2972 | if (!SvOK(sv)) { |
2973 | if (SvREADONLY(sv)) | |
cb077ed2 | 2974 | Perl_croak_no_modify(); |
43230e26 | 2975 | prepare_SV_for_RV(sv); |
68dc0745 | 2976 | switch (to_what) { |
5f05dabc | 2977 | case OPpDEREF_SV: |
561b68a9 | 2978 | SvRV_set(sv, newSV(0)); |
5f05dabc | 2979 | break; |
2980 | case OPpDEREF_AV: | |
ad64d0ec | 2981 | SvRV_set(sv, MUTABLE_SV(newAV())); |
5f05dabc | 2982 | break; |
2983 | case OPpDEREF_HV: | |
ad64d0ec | 2984 | SvRV_set(sv, MUTABLE_SV(newHV())); |
5f05dabc | 2985 | break; |
2986 | } | |
02a9e968 CS |
2987 | SvROK_on(sv); |
2988 | SvSETMAGIC(sv); | |
7e482323 | 2989 | SvGETMAGIC(sv); |
02a9e968 | 2990 | } |
9026059d GG |
2991 | if (SvGMAGICAL(sv)) { |
2992 | /* copy the sv without magic to prevent magic from being | |
2993 | executed twice */ | |
2994 | SV* msv = sv_newmortal(); | |
2995 | sv_setsv_nomg(msv, sv); | |
2996 | return msv; | |
2997 | } | |
2998 | return sv; | |
02a9e968 CS |
2999 | } |
3000 | ||
a0d0e21e LW |
3001 | PP(pp_method) |
3002 | { | |
97aff369 | 3003 | dVAR; dSP; |
890ce7af | 3004 | SV* const sv = TOPs; |
f5d5a27c CS |
3005 | |
3006 | if (SvROK(sv)) { | |
890ce7af | 3007 | SV* const rsv = SvRV(sv); |
f5d5a27c CS |
3008 | if (SvTYPE(rsv) == SVt_PVCV) { |
3009 | SETs(rsv); | |
3010 | RETURN; | |
3011 | } | |
3012 | } | |
3013 | ||
4608196e | 3014 | SETs(method_common(sv, NULL)); |
f5d5a27c CS |
3015 | RETURN; |
3016 | } | |
3017 | ||
3018 | PP(pp_method_named) | |
3019 | { | |
97aff369 | 3020 | dVAR; dSP; |
890ce7af | 3021 | SV* const sv = cSVOP_sv; |
c158a4fd | 3022 | U32 hash = SvSHARED_HASH(sv); |
f5d5a27c CS |
3023 | |
3024 | XPUSHs(method_common(sv, &hash)); | |
3025 | RETURN; | |
3026 | } | |
3027 | ||
3028 | STATIC SV * | |
3029 | S_method_common(pTHX_ SV* meth, U32* hashp) | |
3030 | { | |
97aff369 | 3031 | dVAR; |
a0d0e21e LW |
3032 | SV* ob; |
3033 | GV* gv; | |
56304f61 | 3034 | HV* stash; |
a0714e2c | 3035 | SV *packsv = NULL; |
f226e9be FC |
3036 | SV * const sv = PL_stack_base + TOPMARK == PL_stack_sp |
3037 | ? (Perl_croak(aTHX_ "Can't call method \"%"SVf"\" without a " | |
3038 | "package or object reference", SVfARG(meth)), | |
3039 | (SV *)NULL) | |
3040 | : *(PL_stack_base + TOPMARK + 1); | |
f5d5a27c | 3041 | |
7918f24d NC |
3042 | PERL_ARGS_ASSERT_METHOD_COMMON; |
3043 | ||
4f1b7578 | 3044 | if (!sv) |
7156e69a | 3045 | undefined: |
a214957f VP |
3046 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" on an undefined value", |
3047 | SVfARG(meth)); | |
4f1b7578 | 3048 | |
5b295bef | 3049 | SvGETMAGIC(sv); |
a0d0e21e | 3050 | if (SvROK(sv)) |
ad64d0ec | 3051 | ob = MUTABLE_SV(SvRV(sv)); |
7156e69a | 3052 | else if (!SvOK(sv)) goto undefined; |
a0d0e21e | 3053 | else { |
89269094 | 3054 | /* this isn't a reference */ |
a0d0e21e | 3055 | GV* iogv; |
f937af42 | 3056 | STRLEN packlen; |
89269094 | 3057 | const char * const packname = SvPV_nomg_const(sv, packlen); |
b3ebc221 | 3058 | const bool packname_is_utf8 = !!SvUTF8(sv); |
89269094 | 3059 | const HE* const he = |
b3ebc221 NC |
3060 | (const HE *)hv_common( |
3061 | PL_stashcache, NULL, packname, packlen, | |
3062 | packname_is_utf8 ? HVhek_UTF8 : 0, 0, NULL, 0 | |
da6b625f FC |
3063 | ); |
3064 | ||
89269094 | 3065 | if (he) { |
5e6396ae | 3066 | stash = INT2PTR(HV*,SvIV(HeVAL(he))); |
103f5a36 NC |
3067 | DEBUG_o(Perl_deb(aTHX_ "PL_stashcache hit %p for '%"SVf"'\n", |
3068 | stash, sv)); | |
081fc587 | 3069 | goto fetch; |
081fc587 AB |
3070 | } |
3071 | ||
89269094 | 3072 | if (!(iogv = gv_fetchpvn_flags( |
da6b625f FC |
3073 | packname, packlen, SVf_UTF8 * packname_is_utf8, SVt_PVIO |
3074 | )) || | |
ad64d0ec | 3075 | !(ob=MUTABLE_SV(GvIO(iogv)))) |
a0d0e21e | 3076 | { |
af09ea45 | 3077 | /* this isn't the name of a filehandle either */ |
89269094 | 3078 | if (!packlen) |
834a4ddd | 3079 | { |
7156e69a FC |
3080 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" " |
3081 | "without a package or object reference", | |
3082 | SVfARG(meth)); | |
834a4ddd | 3083 | } |
af09ea45 | 3084 | /* assume it's a package name */ |
f937af42 | 3085 | stash = gv_stashpvn(packname, packlen, packname_is_utf8 ? SVf_UTF8 : 0); |
0dae17bd GS |
3086 | if (!stash) |
3087 | packsv = sv; | |
081fc587 | 3088 | else { |
d4c19fe8 | 3089 | SV* const ref = newSViv(PTR2IV(stash)); |
f937af42 | 3090 | (void)hv_store(PL_stashcache, packname, |
c60dbbc3 | 3091 | packname_is_utf8 ? -(I32)packlen : (I32)packlen, ref, 0); |
103f5a36 NC |
3092 | DEBUG_o(Perl_deb(aTHX_ "PL_stashcache caching %p for '%"SVf"'\n", |
3093 | stash, sv)); | |
7e8961ec | 3094 | } |
ac91690f | 3095 | goto fetch; |
a0d0e21e | 3096 | } |
af09ea45 | 3097 | /* it _is_ a filehandle name -- replace with a reference */ |
ad64d0ec | 3098 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(MUTABLE_SV(iogv))); |
a0d0e21e LW |
3099 | } |
3100 | ||
af09ea45 | 3101 | /* if we got here, ob should be a reference or a glob */ |
f0d43078 | 3102 | if (!ob || !(SvOBJECT(ob) |
6e592b3a BM |
3103 | || (SvTYPE(ob) == SVt_PVGV |
3104 | && isGV_with_GP(ob) | |
159b6efe | 3105 | && (ob = MUTABLE_SV(GvIO((const GV *)ob))) |
f0d43078 GS |
3106 | && SvOBJECT(ob)))) |
3107 | { | |
b375e37b BF |
3108 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" on unblessed reference", |
3109 | SVfARG((SvSCREAM(meth) && strEQ(SvPV_nolen_const(meth),"isa")) | |
3110 | ? newSVpvs_flags("DOES", SVs_TEMP) | |
3111 | : meth)); | |
f0d43078 | 3112 | } |
a0d0e21e | 3113 | |
56304f61 | 3114 | stash = SvSTASH(ob); |
a0d0e21e | 3115 | |
ac91690f | 3116 | fetch: |
af09ea45 IK |
3117 | /* NOTE: stash may be null, hope hv_fetch_ent and |
3118 | gv_fetchmethod can cope (it seems they can) */ | |
3119 | ||
f5d5a27c CS |
3120 | /* shortcut for simple names */ |
3121 | if (hashp) { | |
b464bac0 | 3122 | const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp); |
f5d5a27c | 3123 | if (he) { |
159b6efe | 3124 | gv = MUTABLE_GV(HeVAL(he)); |
f5d5a27c | 3125 | if (isGV(gv) && GvCV(gv) && |
e1a479c5 | 3126 | (!GvCVGEN(gv) || GvCVGEN(gv) |
dd69841b | 3127 | == (PL_sub_generation + HvMROMETA(stash)->cache_gen))) |
ad64d0ec | 3128 | return MUTABLE_SV(GvCV(gv)); |
f5d5a27c CS |
3129 | } |
3130 | } | |
3131 | ||
f937af42 BF |
3132 | gv = gv_fetchmethod_sv_flags(stash ? stash : MUTABLE_HV(packsv), |
3133 | meth, GV_AUTOLOAD | GV_CROAK); | |
9b9d0b15 | 3134 | |
256d1bb2 | 3135 | assert(gv); |
9b9d0b15 | 3136 | |
ad64d0ec | 3137 | return isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv); |
a0d0e21e | 3138 | } |
241d1a3b NC |
3139 | |
3140 | /* | |
3141 | * Local variables: | |
3142 | * c-indentation-style: bsd | |
3143 | * c-basic-offset: 4 | |
14d04a33 | 3144 | * indent-tabs-mode: nil |
241d1a3b NC |
3145 | * End: |
3146 | * | |
14d04a33 | 3147 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3148 | */ |