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 | ||
77 | PP(pp_pushmark) | |
78 | { | |
97aff369 | 79 | dVAR; |
3280af22 | 80 | PUSHMARK(PL_stack_sp); |
a0d0e21e LW |
81 | return NORMAL; |
82 | } | |
83 | ||
84 | PP(pp_stringify) | |
85 | { | |
97aff369 | 86 | dVAR; dSP; dTARGET; |
6050d10e | 87 | sv_copypv(TARG,TOPs); |
a0d0e21e LW |
88 | SETTARG; |
89 | RETURN; | |
90 | } | |
91 | ||
92 | PP(pp_gv) | |
93 | { | |
97aff369 | 94 | dVAR; dSP; |
ad64d0ec | 95 | XPUSHs(MUTABLE_SV(cGVOP_gv)); |
a0d0e21e LW |
96 | RETURN; |
97 | } | |
98 | ||
99 | PP(pp_and) | |
100 | { | |
97aff369 | 101 | dVAR; dSP; |
f410a211 | 102 | PERL_ASYNC_CHECK(); |
a0d0e21e LW |
103 | if (!SvTRUE(TOPs)) |
104 | RETURN; | |
105 | else { | |
c960fc3b SP |
106 | if (PL_op->op_type == OP_AND) |
107 | --SP; | |
a0d0e21e LW |
108 | RETURNOP(cLOGOP->op_other); |
109 | } | |
110 | } | |
111 | ||
112 | PP(pp_sassign) | |
113 | { | |
97aff369 | 114 | dVAR; dSP; dPOPTOPssrl; |
748a9306 | 115 | |
533c011a | 116 | if (PL_op->op_private & OPpASSIGN_BACKWARDS) { |
0bd48802 AL |
117 | SV * const temp = left; |
118 | left = right; right = temp; | |
a0d0e21e | 119 | } |
3280af22 | 120 | if (PL_tainting && PL_tainted && !SvTAINTED(left)) |
a0d0e21e | 121 | TAINT_NOT; |
e26df76a | 122 | if (PL_op->op_private & OPpASSIGN_CV_TO_GV) { |
6136c704 | 123 | SV * const cv = SvRV(left); |
e26df76a | 124 | const U32 cv_type = SvTYPE(cv); |
13be902c | 125 | const bool is_gv = isGV_with_GP(right); |
6136c704 | 126 | const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM; |
e26df76a NC |
127 | |
128 | if (!got_coderef) { | |
129 | assert(SvROK(cv)); | |
130 | } | |
131 | ||
ae6d515f | 132 | /* Can do the optimisation if right (LVALUE) is not a typeglob, |
e26df76a NC |
133 | left (RVALUE) is a reference to something, and we're in void |
134 | context. */ | |
13be902c | 135 | if (!got_coderef && !is_gv && GIMME_V == G_VOID) { |
e26df76a | 136 | /* Is the target symbol table currently empty? */ |
6136c704 | 137 | GV * const gv = gv_fetchsv(right, GV_NOINIT, SVt_PVGV); |
bb112e5a | 138 | if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) { |
e26df76a NC |
139 | /* Good. Create a new proxy constant subroutine in the target. |
140 | The gv becomes a(nother) reference to the constant. */ | |
141 | SV *const value = SvRV(cv); | |
142 | ||
ad64d0ec | 143 | SvUPGRADE(MUTABLE_SV(gv), SVt_IV); |
1ccdb730 | 144 | SvPCS_IMPORTED_on(gv); |
e26df76a | 145 | SvRV_set(gv, value); |
b37c2d43 | 146 | SvREFCNT_inc_simple_void(value); |
e26df76a NC |
147 | SETs(right); |
148 | RETURN; | |
149 | } | |
150 | } | |
151 | ||
152 | /* Need to fix things up. */ | |
13be902c | 153 | if (!is_gv) { |
e26df76a | 154 | /* Need to fix GV. */ |
ad64d0ec | 155 | right = MUTABLE_SV(gv_fetchsv(right, GV_ADD, SVt_PVGV)); |
e26df76a NC |
156 | } |
157 | ||
158 | if (!got_coderef) { | |
159 | /* We've been returned a constant rather than a full subroutine, | |
160 | but they expect a subroutine reference to apply. */ | |
53a42478 | 161 | if (SvROK(cv)) { |
d343c3ef | 162 | ENTER_with_name("sassign_coderef"); |
53a42478 NC |
163 | SvREFCNT_inc_void(SvRV(cv)); |
164 | /* newCONSTSUB takes a reference count on the passed in SV | |
165 | from us. We set the name to NULL, otherwise we get into | |
166 | all sorts of fun as the reference to our new sub is | |
167 | donated to the GV that we're about to assign to. | |
168 | */ | |
ad64d0ec NC |
169 | SvRV_set(left, MUTABLE_SV(newCONSTSUB(GvSTASH(right), NULL, |
170 | SvRV(cv)))); | |
53a42478 | 171 | SvREFCNT_dec(cv); |
d343c3ef | 172 | LEAVE_with_name("sassign_coderef"); |
53a42478 NC |
173 | } else { |
174 | /* What can happen for the corner case *{"BONK"} = \&{"BONK"}; | |
175 | is that | |
176 | First: ops for \&{"BONK"}; return us the constant in the | |
177 | symbol table | |
178 | Second: ops for *{"BONK"} cause that symbol table entry | |
179 | (and our reference to it) to be upgraded from RV | |
180 | to typeblob) | |
181 | Thirdly: We get here. cv is actually PVGV now, and its | |
182 | GvCV() is actually the subroutine we're looking for | |
183 | ||
184 | So change the reference so that it points to the subroutine | |
185 | of that typeglob, as that's what they were after all along. | |
186 | */ | |
159b6efe | 187 | GV *const upgraded = MUTABLE_GV(cv); |
53a42478 NC |
188 | CV *const source = GvCV(upgraded); |
189 | ||
190 | assert(source); | |
191 | assert(CvFLAGS(source) & CVf_CONST); | |
192 | ||
193 | SvREFCNT_inc_void(source); | |
194 | SvREFCNT_dec(upgraded); | |
ad64d0ec | 195 | SvRV_set(left, MUTABLE_SV(source)); |
53a42478 | 196 | } |
e26df76a | 197 | } |
53a42478 | 198 | |
e26df76a | 199 | } |
8fe85e3f FC |
200 | if ( |
201 | SvTEMP(right) && !SvSMAGICAL(right) && SvREFCNT(right) == 1 && | |
202 | (!isGV_with_GP(right) || SvFAKE(right)) && ckWARN(WARN_MISC) | |
203 | ) | |
204 | Perl_warner(aTHX_ | |
205 | packWARN(WARN_MISC), "Useless assignment to a temporary" | |
206 | ); | |
54310121 | 207 | SvSetMagicSV(right, left); |
a0d0e21e LW |
208 | SETs(right); |
209 | RETURN; | |
210 | } | |
211 | ||
212 | PP(pp_cond_expr) | |
213 | { | |
97aff369 | 214 | dVAR; dSP; |
f410a211 | 215 | PERL_ASYNC_CHECK(); |
a0d0e21e | 216 | if (SvTRUEx(POPs)) |
1a67a97c | 217 | RETURNOP(cLOGOP->op_other); |
a0d0e21e | 218 | else |
1a67a97c | 219 | RETURNOP(cLOGOP->op_next); |
a0d0e21e LW |
220 | } |
221 | ||
222 | PP(pp_unstack) | |
223 | { | |
97aff369 | 224 | dVAR; |
8f3964af | 225 | PERL_ASYNC_CHECK(); |
a0d0e21e | 226 | TAINT_NOT; /* Each statement is presumed innocent */ |
3280af22 | 227 | PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp; |
a0d0e21e | 228 | FREETMPS; |
eae48c89 Z |
229 | if (!(PL_op->op_flags & OPf_SPECIAL)) { |
230 | I32 oldsave = PL_scopestack[PL_scopestack_ix - 1]; | |
231 | LEAVE_SCOPE(oldsave); | |
232 | } | |
a0d0e21e LW |
233 | return NORMAL; |
234 | } | |
235 | ||
a0d0e21e LW |
236 | PP(pp_concat) |
237 | { | |
6f1401dc | 238 | dVAR; dSP; dATARGET; tryAMAGICbin_MG(concat_amg, AMGf_assign); |
748a9306 LW |
239 | { |
240 | dPOPTOPssrl; | |
8d6d96c1 HS |
241 | bool lbyte; |
242 | STRLEN rlen; | |
d4c19fe8 | 243 | const char *rpv = NULL; |
a6b599c7 | 244 | bool rbyte = FALSE; |
a9c4fd4e | 245 | bool rcopied = FALSE; |
8d6d96c1 | 246 | |
6f1401dc DM |
247 | if (TARG == right && right != left) { /* $r = $l.$r */ |
248 | rpv = SvPV_nomg_const(right, rlen); | |
c75ab21a | 249 | rbyte = !DO_UTF8(right); |
59cd0e26 | 250 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
349d4f2f | 251 | rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */ |
db79b45b | 252 | rcopied = TRUE; |
8d6d96c1 | 253 | } |
7889fe52 | 254 | |
89734059 | 255 | if (TARG != left) { /* not $l .= $r */ |
a9c4fd4e | 256 | STRLEN llen; |
6f1401dc | 257 | const char* const lpv = SvPV_nomg_const(left, llen); |
90f5826e | 258 | lbyte = !DO_UTF8(left); |
8d6d96c1 HS |
259 | sv_setpvn(TARG, lpv, llen); |
260 | if (!lbyte) | |
261 | SvUTF8_on(TARG); | |
262 | else | |
263 | SvUTF8_off(TARG); | |
264 | } | |
89734059 | 265 | else { /* $l .= $r */ |
c75ab21a | 266 | if (!SvOK(TARG)) { |
89734059 | 267 | if (left == right && ckWARN(WARN_UNINITIALIZED)) /* $l .= $l */ |
c75ab21a | 268 | report_uninit(right); |
76f68e9b | 269 | sv_setpvs(left, ""); |
c75ab21a | 270 | } |
c5aa2872 DM |
271 | lbyte = (SvROK(left) && SvTYPE(SvRV(left)) == SVt_REGEXP) |
272 | ? !DO_UTF8(SvRV(left)) : !DO_UTF8(left); | |
90f5826e TS |
273 | if (IN_BYTES) |
274 | SvUTF8_off(TARG); | |
8d6d96c1 | 275 | } |
a12c0f56 | 276 | |
c75ab21a | 277 | if (!rcopied) { |
6f1401dc | 278 | if (left == right) |
89734059 | 279 | /* $r.$r: do magic twice: tied might return different 2nd time */ |
6f1401dc DM |
280 | SvGETMAGIC(right); |
281 | rpv = SvPV_nomg_const(right, rlen); | |
c75ab21a RH |
282 | rbyte = !DO_UTF8(right); |
283 | } | |
8d6d96c1 | 284 | if (lbyte != rbyte) { |
e3393f51 NT |
285 | /* sv_utf8_upgrade_nomg() may reallocate the stack */ |
286 | PUTBACK; | |
8d6d96c1 HS |
287 | if (lbyte) |
288 | sv_utf8_upgrade_nomg(TARG); | |
289 | else { | |
db79b45b | 290 | if (!rcopied) |
59cd0e26 | 291 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
8d6d96c1 | 292 | sv_utf8_upgrade_nomg(right); |
6f1401dc | 293 | rpv = SvPV_nomg_const(right, rlen); |
69b47968 | 294 | } |
e3393f51 | 295 | SPAGAIN; |
a0d0e21e | 296 | } |
8d6d96c1 | 297 | sv_catpvn_nomg(TARG, rpv, rlen); |
43ebc500 | 298 | |
a0d0e21e LW |
299 | SETTARG; |
300 | RETURN; | |
748a9306 | 301 | } |
a0d0e21e LW |
302 | } |
303 | ||
304 | PP(pp_padsv) | |
305 | { | |
97aff369 | 306 | dVAR; dSP; dTARGET; |
a0d0e21e | 307 | XPUSHs(TARG); |
533c011a NIS |
308 | if (PL_op->op_flags & OPf_MOD) { |
309 | if (PL_op->op_private & OPpLVAL_INTRO) | |
952306ac RGS |
310 | if (!(PL_op->op_private & OPpPAD_STATE)) |
311 | SAVECLEARSV(PAD_SVl(PL_op->op_targ)); | |
a62b51b8 | 312 | if (PL_op->op_private & OPpDEREF) { |
8ec5e241 | 313 | PUTBACK; |
dd2155a4 | 314 | vivify_ref(PAD_SVl(PL_op->op_targ), PL_op->op_private & OPpDEREF); |
8ec5e241 NIS |
315 | SPAGAIN; |
316 | } | |
4633a7c4 | 317 | } |
a0d0e21e LW |
318 | RETURN; |
319 | } | |
320 | ||
321 | PP(pp_readline) | |
322 | { | |
97aff369 | 323 | dVAR; |
9e27fd70 | 324 | dSP; SvGETMAGIC(TOPs); |
9426e1a5 | 325 | tryAMAGICunTARGET(iter_amg, 0, 0); |
159b6efe | 326 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
6e592b3a BM |
327 | if (!isGV_with_GP(PL_last_in_gv)) { |
328 | if (SvROK(PL_last_in_gv) && isGV_with_GP(SvRV(PL_last_in_gv))) | |
159b6efe | 329 | PL_last_in_gv = MUTABLE_GV(SvRV(PL_last_in_gv)); |
8efb3254 | 330 | else { |
f5284f61 | 331 | dSP; |
ad64d0ec | 332 | XPUSHs(MUTABLE_SV(PL_last_in_gv)); |
f5284f61 | 333 | PUTBACK; |
897d3989 | 334 | Perl_pp_rv2gv(aTHX); |
159b6efe | 335 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
f5284f61 IZ |
336 | } |
337 | } | |
a0d0e21e LW |
338 | return do_readline(); |
339 | } | |
340 | ||
341 | PP(pp_eq) | |
342 | { | |
6f1401dc | 343 | dVAR; dSP; |
a42d0242 | 344 | tryAMAGICbin_MG(eq_amg, AMGf_set|AMGf_numeric); |
4c9fe80f | 345 | #ifndef NV_PRESERVES_UV |
ed3b9b3c | 346 | if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) { |
e61d22ef NC |
347 | SP--; |
348 | SETs(boolSV(SvRV(TOPs) == SvRV(TOPp1s))); | |
4c9fe80f AS |
349 | RETURN; |
350 | } | |
351 | #endif | |
28e5dec8 | 352 | #ifdef PERL_PRESERVE_IVUV |
6f1401dc | 353 | SvIV_please_nomg(TOPs); |
28e5dec8 | 354 | if (SvIOK(TOPs)) { |
4c9fe80f AS |
355 | /* Unless the left argument is integer in range we are going |
356 | to have to use NV maths. Hence only attempt to coerce the | |
357 | right argument if we know the left is integer. */ | |
6f1401dc | 358 | SvIV_please_nomg(TOPm1s); |
28e5dec8 | 359 | if (SvIOK(TOPm1s)) { |
0bd48802 AL |
360 | const bool auvok = SvUOK(TOPm1s); |
361 | const bool buvok = SvUOK(TOPs); | |
a12c0f56 | 362 | |
1605159e NC |
363 | if (auvok == buvok) { /* ## IV == IV or UV == UV ## */ |
364 | /* Casting IV to UV before comparison isn't going to matter | |
365 | on 2s complement. On 1s complement or sign&magnitude | |
366 | (if we have any of them) it could to make negative zero | |
367 | differ from normal zero. As I understand it. (Need to | |
368 | check - is negative zero implementation defined behaviour | |
369 | anyway?). NWC */ | |
0bd48802 AL |
370 | const UV buv = SvUVX(POPs); |
371 | const UV auv = SvUVX(TOPs); | |
28e5dec8 | 372 | |
28e5dec8 JH |
373 | SETs(boolSV(auv == buv)); |
374 | RETURN; | |
375 | } | |
376 | { /* ## Mixed IV,UV ## */ | |
1605159e | 377 | SV *ivp, *uvp; |
28e5dec8 | 378 | IV iv; |
28e5dec8 | 379 | |
1605159e | 380 | /* == is commutative so doesn't matter which is left or right */ |
28e5dec8 | 381 | if (auvok) { |
1605159e NC |
382 | /* top of stack (b) is the iv */ |
383 | ivp = *SP; | |
384 | uvp = *--SP; | |
385 | } else { | |
386 | uvp = *SP; | |
387 | ivp = *--SP; | |
388 | } | |
389 | iv = SvIVX(ivp); | |
d4c19fe8 | 390 | if (iv < 0) |
1605159e NC |
391 | /* As uv is a UV, it's >0, so it cannot be == */ |
392 | SETs(&PL_sv_no); | |
d4c19fe8 AL |
393 | else |
394 | /* we know iv is >= 0 */ | |
395 | SETs(boolSV((UV)iv == SvUVX(uvp))); | |
28e5dec8 JH |
396 | RETURN; |
397 | } | |
398 | } | |
399 | } | |
400 | #endif | |
a0d0e21e | 401 | { |
cab190d4 | 402 | #if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan) |
6f1401dc | 403 | dPOPTOPnnrl_nomg; |
cab190d4 JD |
404 | if (Perl_isnan(left) || Perl_isnan(right)) |
405 | RETSETNO; | |
406 | SETs(boolSV(left == right)); | |
407 | #else | |
6f1401dc DM |
408 | dPOPnv_nomg; |
409 | SETs(boolSV(SvNV_nomg(TOPs) == value)); | |
cab190d4 | 410 | #endif |
a0d0e21e LW |
411 | RETURN; |
412 | } | |
413 | } | |
414 | ||
415 | PP(pp_preinc) | |
416 | { | |
97aff369 | 417 | dVAR; dSP; |
6e592b3a | 418 | if (SvTYPE(TOPs) >= SVt_PVAV || isGV_with_GP(TOPs)) |
6ad8f254 | 419 | Perl_croak_no_modify(aTHX); |
3510b4a1 NC |
420 | if (!SvREADONLY(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) |
421 | && SvIVX(TOPs) != IV_MAX) | |
55497cff | 422 | { |
45977657 | 423 | SvIV_set(TOPs, SvIVX(TOPs) + 1); |
55497cff | 424 | SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK); |
748a9306 | 425 | } |
28e5dec8 | 426 | else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */ |
748a9306 | 427 | sv_inc(TOPs); |
a0d0e21e LW |
428 | SvSETMAGIC(TOPs); |
429 | return NORMAL; | |
430 | } | |
431 | ||
432 | PP(pp_or) | |
433 | { | |
97aff369 | 434 | dVAR; dSP; |
f410a211 | 435 | PERL_ASYNC_CHECK(); |
a0d0e21e LW |
436 | if (SvTRUE(TOPs)) |
437 | RETURN; | |
438 | else { | |
c960fc3b SP |
439 | if (PL_op->op_type == OP_OR) |
440 | --SP; | |
a0d0e21e LW |
441 | RETURNOP(cLOGOP->op_other); |
442 | } | |
443 | } | |
444 | ||
25a55bd7 | 445 | PP(pp_defined) |
c963b151 | 446 | { |
97aff369 | 447 | dVAR; dSP; |
6136c704 AL |
448 | register SV* sv; |
449 | bool defined; | |
25a55bd7 | 450 | const int op_type = PL_op->op_type; |
ea5195b7 | 451 | const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN); |
c963b151 | 452 | |
6136c704 | 453 | if (is_dor) { |
f410a211 | 454 | PERL_ASYNC_CHECK(); |
25a55bd7 SP |
455 | sv = TOPs; |
456 | if (!sv || !SvANY(sv)) { | |
2bd49cfc NC |
457 | if (op_type == OP_DOR) |
458 | --SP; | |
25a55bd7 SP |
459 | RETURNOP(cLOGOP->op_other); |
460 | } | |
b7c44293 RGS |
461 | } |
462 | else { | |
463 | /* OP_DEFINED */ | |
25a55bd7 SP |
464 | sv = POPs; |
465 | if (!sv || !SvANY(sv)) | |
466 | RETPUSHNO; | |
b7c44293 | 467 | } |
25a55bd7 | 468 | |
6136c704 | 469 | defined = FALSE; |
c963b151 BD |
470 | switch (SvTYPE(sv)) { |
471 | case SVt_PVAV: | |
472 | if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
25a55bd7 | 473 | defined = TRUE; |
c963b151 BD |
474 | break; |
475 | case SVt_PVHV: | |
476 | if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
25a55bd7 | 477 | defined = TRUE; |
c963b151 BD |
478 | break; |
479 | case SVt_PVCV: | |
480 | if (CvROOT(sv) || CvXSUB(sv)) | |
25a55bd7 | 481 | defined = TRUE; |
c963b151 BD |
482 | break; |
483 | default: | |
5b295bef | 484 | SvGETMAGIC(sv); |
c963b151 | 485 | if (SvOK(sv)) |
25a55bd7 | 486 | defined = TRUE; |
6136c704 | 487 | break; |
c963b151 | 488 | } |
6136c704 AL |
489 | |
490 | if (is_dor) { | |
c960fc3b SP |
491 | if(defined) |
492 | RETURN; | |
493 | if(op_type == OP_DOR) | |
494 | --SP; | |
25a55bd7 | 495 | RETURNOP(cLOGOP->op_other); |
25a55bd7 | 496 | } |
d9aa96a4 SP |
497 | /* assuming OP_DEFINED */ |
498 | if(defined) | |
499 | RETPUSHYES; | |
500 | RETPUSHNO; | |
c963b151 BD |
501 | } |
502 | ||
a0d0e21e LW |
503 | PP(pp_add) |
504 | { | |
800401ee | 505 | dVAR; dSP; dATARGET; bool useleft; SV *svl, *svr; |
6f1401dc DM |
506 | tryAMAGICbin_MG(add_amg, AMGf_assign|AMGf_numeric); |
507 | svr = TOPs; | |
508 | svl = TOPm1s; | |
509 | ||
800401ee | 510 | useleft = USE_LEFT(svl); |
28e5dec8 JH |
511 | #ifdef PERL_PRESERVE_IVUV |
512 | /* We must see if we can perform the addition with integers if possible, | |
513 | as the integer code detects overflow while the NV code doesn't. | |
514 | If either argument hasn't had a numeric conversion yet attempt to get | |
515 | the IV. It's important to do this now, rather than just assuming that | |
516 | it's not IOK as a PV of "9223372036854775806" may not take well to NV | |
517 | addition, and an SV which is NOK, NV=6.0 ought to be coerced to | |
518 | integer in case the second argument is IV=9223372036854775806 | |
519 | We can (now) rely on sv_2iv to do the right thing, only setting the | |
520 | public IOK flag if the value in the NV (or PV) slot is truly integer. | |
521 | ||
522 | A side effect is that this also aggressively prefers integer maths over | |
7dca457a NC |
523 | fp maths for integer values. |
524 | ||
a00b5bd3 | 525 | How to detect overflow? |
7dca457a NC |
526 | |
527 | C 99 section 6.2.6.1 says | |
528 | ||
529 | The range of nonnegative values of a signed integer type is a subrange | |
530 | of the corresponding unsigned integer type, and the representation of | |
531 | the same value in each type is the same. A computation involving | |
532 | unsigned operands can never overflow, because a result that cannot be | |
533 | represented by the resulting unsigned integer type is reduced modulo | |
534 | the number that is one greater than the largest value that can be | |
535 | represented by the resulting type. | |
536 | ||
537 | (the 9th paragraph) | |
538 | ||
539 | which I read as "unsigned ints wrap." | |
540 | ||
541 | signed integer overflow seems to be classed as "exception condition" | |
542 | ||
543 | If an exceptional condition occurs during the evaluation of an | |
544 | expression (that is, if the result is not mathematically defined or not | |
545 | in the range of representable values for its type), the behavior is | |
546 | undefined. | |
547 | ||
548 | (6.5, the 5th paragraph) | |
549 | ||
550 | I had assumed that on 2s complement machines signed arithmetic would | |
551 | wrap, hence coded pp_add and pp_subtract on the assumption that | |
552 | everything perl builds on would be happy. After much wailing and | |
553 | gnashing of teeth it would seem that irix64 knows its ANSI spec well, | |
554 | knows that it doesn't need to, and doesn't. Bah. Anyway, the all- | |
555 | unsigned code below is actually shorter than the old code. :-) | |
556 | */ | |
557 | ||
6f1401dc DM |
558 | SvIV_please_nomg(svr); |
559 | ||
800401ee | 560 | if (SvIOK(svr)) { |
28e5dec8 JH |
561 | /* Unless the left argument is integer in range we are going to have to |
562 | use NV maths. Hence only attempt to coerce the right argument if | |
563 | we know the left is integer. */ | |
9c5ffd7c JH |
564 | register UV auv = 0; |
565 | bool auvok = FALSE; | |
7dca457a NC |
566 | bool a_valid = 0; |
567 | ||
28e5dec8 | 568 | if (!useleft) { |
7dca457a NC |
569 | auv = 0; |
570 | a_valid = auvok = 1; | |
571 | /* left operand is undef, treat as zero. + 0 is identity, | |
572 | Could SETi or SETu right now, but space optimise by not adding | |
573 | lots of code to speed up what is probably a rarish case. */ | |
574 | } else { | |
575 | /* Left operand is defined, so is it IV? */ | |
6f1401dc | 576 | SvIV_please_nomg(svl); |
800401ee JH |
577 | if (SvIOK(svl)) { |
578 | if ((auvok = SvUOK(svl))) | |
579 | auv = SvUVX(svl); | |
7dca457a | 580 | else { |
800401ee | 581 | register const IV aiv = SvIVX(svl); |
7dca457a NC |
582 | if (aiv >= 0) { |
583 | auv = aiv; | |
584 | auvok = 1; /* Now acting as a sign flag. */ | |
585 | } else { /* 2s complement assumption for IV_MIN */ | |
586 | auv = (UV)-aiv; | |
587 | } | |
588 | } | |
589 | a_valid = 1; | |
28e5dec8 JH |
590 | } |
591 | } | |
7dca457a NC |
592 | if (a_valid) { |
593 | bool result_good = 0; | |
594 | UV result; | |
595 | register UV buv; | |
800401ee | 596 | bool buvok = SvUOK(svr); |
a00b5bd3 | 597 | |
7dca457a | 598 | if (buvok) |
800401ee | 599 | buv = SvUVX(svr); |
7dca457a | 600 | else { |
800401ee | 601 | register const IV biv = SvIVX(svr); |
7dca457a NC |
602 | if (biv >= 0) { |
603 | buv = biv; | |
604 | buvok = 1; | |
605 | } else | |
606 | buv = (UV)-biv; | |
607 | } | |
608 | /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve, | |
602f51c4 | 609 | else "IV" now, independent of how it came in. |
7dca457a NC |
610 | if a, b represents positive, A, B negative, a maps to -A etc |
611 | a + b => (a + b) | |
612 | A + b => -(a - b) | |
613 | a + B => (a - b) | |
614 | A + B => -(a + b) | |
615 | all UV maths. negate result if A negative. | |
616 | add if signs same, subtract if signs differ. */ | |
617 | ||
618 | if (auvok ^ buvok) { | |
619 | /* Signs differ. */ | |
620 | if (auv >= buv) { | |
621 | result = auv - buv; | |
622 | /* Must get smaller */ | |
623 | if (result <= auv) | |
624 | result_good = 1; | |
625 | } else { | |
626 | result = buv - auv; | |
627 | if (result <= buv) { | |
628 | /* result really should be -(auv-buv). as its negation | |
629 | of true value, need to swap our result flag */ | |
630 | auvok = !auvok; | |
631 | result_good = 1; | |
28e5dec8 JH |
632 | } |
633 | } | |
7dca457a NC |
634 | } else { |
635 | /* Signs same */ | |
636 | result = auv + buv; | |
637 | if (result >= auv) | |
638 | result_good = 1; | |
639 | } | |
640 | if (result_good) { | |
641 | SP--; | |
642 | if (auvok) | |
28e5dec8 | 643 | SETu( result ); |
7dca457a NC |
644 | else { |
645 | /* Negate result */ | |
646 | if (result <= (UV)IV_MIN) | |
647 | SETi( -(IV)result ); | |
648 | else { | |
649 | /* result valid, but out of range for IV. */ | |
650 | SETn( -(NV)result ); | |
28e5dec8 JH |
651 | } |
652 | } | |
7dca457a NC |
653 | RETURN; |
654 | } /* Overflow, drop through to NVs. */ | |
28e5dec8 JH |
655 | } |
656 | } | |
657 | #endif | |
a0d0e21e | 658 | { |
6f1401dc | 659 | NV value = SvNV_nomg(svr); |
4efa5a16 | 660 | (void)POPs; |
28e5dec8 JH |
661 | if (!useleft) { |
662 | /* left operand is undef, treat as zero. + 0.0 is identity. */ | |
663 | SETn(value); | |
664 | RETURN; | |
665 | } | |
6f1401dc | 666 | SETn( value + SvNV_nomg(svl) ); |
28e5dec8 | 667 | RETURN; |
a0d0e21e LW |
668 | } |
669 | } | |
670 | ||
671 | PP(pp_aelemfast) | |
672 | { | |
97aff369 | 673 | dVAR; dSP; |
502c6561 | 674 | AV * const av = PL_op->op_flags & OPf_SPECIAL |
8f878375 | 675 | ? MUTABLE_AV(PAD_SV(PL_op->op_targ)) : GvAVn(cGVOP_gv); |
a3b680e6 | 676 | const U32 lval = PL_op->op_flags & OPf_MOD; |
0bd48802 | 677 | SV** const svp = av_fetch(av, PL_op->op_private, lval); |
3280af22 | 678 | SV *sv = (svp ? *svp : &PL_sv_undef); |
6ff81951 | 679 | EXTEND(SP, 1); |
39cf747a | 680 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
fd69380d | 681 | mg_get(sv); |
be6c24e0 | 682 | PUSHs(sv); |
a0d0e21e LW |
683 | RETURN; |
684 | } | |
685 | ||
686 | PP(pp_join) | |
687 | { | |
97aff369 | 688 | dVAR; dSP; dMARK; dTARGET; |
a0d0e21e LW |
689 | MARK++; |
690 | do_join(TARG, *MARK, MARK, SP); | |
691 | SP = MARK; | |
692 | SETs(TARG); | |
693 | RETURN; | |
694 | } | |
695 | ||
696 | PP(pp_pushre) | |
697 | { | |
97aff369 | 698 | dVAR; dSP; |
44a8e56a | 699 | #ifdef DEBUGGING |
700 | /* | |
701 | * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs | |
702 | * will be enough to hold an OP*. | |
703 | */ | |
c4420975 | 704 | SV* const sv = sv_newmortal(); |
44a8e56a | 705 | sv_upgrade(sv, SVt_PVLV); |
706 | LvTYPE(sv) = '/'; | |
533c011a | 707 | Copy(&PL_op, &LvTARGOFF(sv), 1, OP*); |
44a8e56a | 708 | XPUSHs(sv); |
709 | #else | |
ad64d0ec | 710 | XPUSHs(MUTABLE_SV(PL_op)); |
44a8e56a | 711 | #endif |
a0d0e21e LW |
712 | RETURN; |
713 | } | |
714 | ||
715 | /* Oversized hot code. */ | |
716 | ||
717 | PP(pp_print) | |
718 | { | |
27da23d5 | 719 | dVAR; dSP; dMARK; dORIGMARK; |
760ac839 | 720 | register PerlIO *fp; |
236988e4 | 721 | MAGIC *mg; |
159b6efe NC |
722 | GV * const gv |
723 | = (PL_op->op_flags & OPf_STACKED) ? MUTABLE_GV(*++MARK) : PL_defoutgv; | |
9c9f25b8 | 724 | IO *io = GvIO(gv); |
5b468f54 | 725 | |
9c9f25b8 | 726 | if (io |
ad64d0ec | 727 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
5b468f54 | 728 | { |
01bb7c6d | 729 | had_magic: |
68dc0745 | 730 | if (MARK == ORIGMARK) { |
1c846c1f | 731 | /* If using default handle then we need to make space to |
a60c0954 NIS |
732 | * pass object as 1st arg, so move other args up ... |
733 | */ | |
4352c267 | 734 | MEXTEND(SP, 1); |
68dc0745 | 735 | ++MARK; |
736 | Move(MARK, MARK + 1, (SP - MARK) + 1, SV*); | |
737 | ++SP; | |
738 | } | |
94bc412f NC |
739 | return Perl_tied_method(aTHX_ "PRINT", mark - 1, MUTABLE_SV(io), |
740 | mg, | |
741 | (G_SCALAR | TIED_METHOD_ARGUMENTS_ON_STACK | |
742 | | (PL_op->op_type == OP_SAY | |
743 | ? TIED_METHOD_SAY : 0)), sp - mark); | |
236988e4 | 744 | } |
9c9f25b8 | 745 | if (!io) { |
68b590d9 | 746 | if ( gv && GvEGVx(gv) && (io = GvIO(GvEGV(gv))) |
ad64d0ec | 747 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
01bb7c6d | 748 | goto had_magic; |
51087808 | 749 | report_evil_fh(gv); |
93189314 | 750 | SETERRNO(EBADF,RMS_IFI); |
a0d0e21e LW |
751 | goto just_say_no; |
752 | } | |
753 | else if (!(fp = IoOFP(io))) { | |
7716c5c5 NC |
754 | if (IoIFP(io)) |
755 | report_wrongway_fh(gv, '<'); | |
51087808 | 756 | else |
7716c5c5 | 757 | report_evil_fh(gv); |
93189314 | 758 | SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI); |
a0d0e21e LW |
759 | goto just_say_no; |
760 | } | |
761 | else { | |
e23d9e2f | 762 | SV * const ofs = GvSV(PL_ofsgv); /* $, */ |
a0d0e21e | 763 | MARK++; |
e23d9e2f | 764 | if (ofs && (SvGMAGICAL(ofs) || SvOK(ofs))) { |
a0d0e21e LW |
765 | while (MARK <= SP) { |
766 | if (!do_print(*MARK, fp)) | |
767 | break; | |
768 | MARK++; | |
769 | if (MARK <= SP) { | |
e23d9e2f CS |
770 | /* don't use 'ofs' here - it may be invalidated by magic callbacks */ |
771 | if (!do_print(GvSV(PL_ofsgv), fp)) { | |
a0d0e21e LW |
772 | MARK--; |
773 | break; | |
774 | } | |
775 | } | |
776 | } | |
777 | } | |
778 | else { | |
779 | while (MARK <= SP) { | |
780 | if (!do_print(*MARK, fp)) | |
781 | break; | |
782 | MARK++; | |
783 | } | |
784 | } | |
785 | if (MARK <= SP) | |
786 | goto just_say_no; | |
787 | else { | |
cfc4a7da GA |
788 | if (PL_op->op_type == OP_SAY) { |
789 | if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp)) | |
790 | goto just_say_no; | |
791 | } | |
792 | else if (PL_ors_sv && SvOK(PL_ors_sv)) | |
7889fe52 | 793 | if (!do_print(PL_ors_sv, fp)) /* $\ */ |
a0d0e21e LW |
794 | goto just_say_no; |
795 | ||
796 | if (IoFLAGS(io) & IOf_FLUSH) | |
760ac839 | 797 | if (PerlIO_flush(fp) == EOF) |
a0d0e21e LW |
798 | goto just_say_no; |
799 | } | |
800 | } | |
801 | SP = ORIGMARK; | |
e52fd6f4 | 802 | XPUSHs(&PL_sv_yes); |
a0d0e21e LW |
803 | RETURN; |
804 | ||
805 | just_say_no: | |
806 | SP = ORIGMARK; | |
e52fd6f4 | 807 | XPUSHs(&PL_sv_undef); |
a0d0e21e LW |
808 | RETURN; |
809 | } | |
810 | ||
811 | PP(pp_rv2av) | |
812 | { | |
97aff369 | 813 | dVAR; dSP; dTOPss; |
cde874ca | 814 | const I32 gimme = GIMME_V; |
17ab7946 NC |
815 | static const char an_array[] = "an ARRAY"; |
816 | static const char a_hash[] = "a HASH"; | |
817 | const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV; | |
d83b45b8 | 818 | const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV; |
a0d0e21e | 819 | |
0824d667 DM |
820 | if (!(PL_op->op_private & OPpDEREFed)) |
821 | SvGETMAGIC(sv); | |
a0d0e21e | 822 | if (SvROK(sv)) { |
93d7320b DM |
823 | if (SvAMAGIC(sv)) { |
824 | sv = amagic_deref_call(sv, is_pp_rv2av ? to_av_amg : to_hv_amg); | |
825 | SPAGAIN; | |
826 | } | |
17ab7946 NC |
827 | sv = SvRV(sv); |
828 | if (SvTYPE(sv) != type) | |
829 | DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash); | |
533c011a | 830 | if (PL_op->op_flags & OPf_REF) { |
17ab7946 | 831 | SETs(sv); |
a0d0e21e LW |
832 | RETURN; |
833 | } | |
40c94d11 FC |
834 | else if (PL_op->op_private & OPpMAYBE_LVSUB) { |
835 | const I32 flags = is_lvalue_sub(); | |
836 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
cde874ca | 837 | if (gimme != G_ARRAY) |
042560a6 | 838 | goto croak_cant_return; |
17ab7946 | 839 | SETs(sv); |
78f9721b | 840 | RETURN; |
40c94d11 | 841 | } |
78f9721b | 842 | } |
82d03984 RGS |
843 | else if (PL_op->op_flags & OPf_MOD |
844 | && PL_op->op_private & OPpLVAL_INTRO) | |
f1f66076 | 845 | Perl_croak(aTHX_ "%s", PL_no_localize_ref); |
a0d0e21e LW |
846 | } |
847 | else { | |
17ab7946 | 848 | if (SvTYPE(sv) == type) { |
533c011a | 849 | if (PL_op->op_flags & OPf_REF) { |
17ab7946 | 850 | SETs(sv); |
a0d0e21e LW |
851 | RETURN; |
852 | } | |
78f9721b | 853 | else if (LVRET) { |
cde874ca | 854 | if (gimme != G_ARRAY) |
042560a6 | 855 | goto croak_cant_return; |
17ab7946 | 856 | SETs(sv); |
78f9721b SM |
857 | RETURN; |
858 | } | |
a0d0e21e LW |
859 | } |
860 | else { | |
67955e0c | 861 | GV *gv; |
1c846c1f | 862 | |
6e592b3a | 863 | if (!isGV_with_GP(sv)) { |
dc3c76f8 NC |
864 | gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash, |
865 | type, &sp); | |
866 | if (!gv) | |
867 | RETURN; | |
35cd451c GS |
868 | } |
869 | else { | |
159b6efe | 870 | gv = MUTABLE_GV(sv); |
a0d0e21e | 871 | } |
ad64d0ec | 872 | sv = is_pp_rv2av ? MUTABLE_SV(GvAVn(gv)) : MUTABLE_SV(GvHVn(gv)); |
533c011a | 873 | if (PL_op->op_private & OPpLVAL_INTRO) |
ad64d0ec | 874 | sv = is_pp_rv2av ? MUTABLE_SV(save_ary(gv)) : MUTABLE_SV(save_hash(gv)); |
533c011a | 875 | if (PL_op->op_flags & OPf_REF) { |
17ab7946 | 876 | SETs(sv); |
a0d0e21e LW |
877 | RETURN; |
878 | } | |
40c94d11 FC |
879 | else if (PL_op->op_private & OPpMAYBE_LVSUB) { |
880 | const I32 flags = is_lvalue_sub(); | |
881 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
cde874ca | 882 | if (gimme != G_ARRAY) |
042560a6 | 883 | goto croak_cant_return; |
17ab7946 | 884 | SETs(sv); |
78f9721b | 885 | RETURN; |
40c94d11 | 886 | } |
78f9721b | 887 | } |
a0d0e21e LW |
888 | } |
889 | } | |
890 | ||
17ab7946 | 891 | if (is_pp_rv2av) { |
502c6561 | 892 | AV *const av = MUTABLE_AV(sv); |
486ec47a | 893 | /* The guts of pp_rv2av, with no intending change to preserve history |
17ab7946 NC |
894 | (until such time as we get tools that can do blame annotation across |
895 | whitespace changes. */ | |
96913b52 VP |
896 | if (gimme == G_ARRAY) { |
897 | const I32 maxarg = AvFILL(av) + 1; | |
898 | (void)POPs; /* XXXX May be optimized away? */ | |
899 | EXTEND(SP, maxarg); | |
900 | if (SvRMAGICAL(av)) { | |
901 | U32 i; | |
902 | for (i=0; i < (U32)maxarg; i++) { | |
903 | SV ** const svp = av_fetch(av, i, FALSE); | |
904 | /* See note in pp_helem, and bug id #27839 */ | |
905 | SP[i+1] = svp | |
906 | ? SvGMAGICAL(*svp) ? (mg_get(*svp), *svp) : *svp | |
907 | : &PL_sv_undef; | |
908 | } | |
909 | } | |
910 | else { | |
911 | Copy(AvARRAY(av), SP+1, maxarg, SV*); | |
93965878 | 912 | } |
96913b52 | 913 | SP += maxarg; |
1c846c1f | 914 | } |
96913b52 VP |
915 | else if (gimme == G_SCALAR) { |
916 | dTARGET; | |
917 | const I32 maxarg = AvFILL(av) + 1; | |
918 | SETi(maxarg); | |
93965878 | 919 | } |
17ab7946 NC |
920 | } else { |
921 | /* The guts of pp_rv2hv */ | |
96913b52 VP |
922 | if (gimme == G_ARRAY) { /* array wanted */ |
923 | *PL_stack_sp = sv; | |
981b7185 | 924 | return Perl_do_kv(aTHX); |
96913b52 VP |
925 | } |
926 | else if (gimme == G_SCALAR) { | |
927 | dTARGET; | |
928 | TARG = Perl_hv_scalar(aTHX_ MUTABLE_HV(sv)); | |
929 | SPAGAIN; | |
930 | SETTARG; | |
931 | } | |
17ab7946 | 932 | } |
be85d344 | 933 | RETURN; |
042560a6 NC |
934 | |
935 | croak_cant_return: | |
936 | Perl_croak(aTHX_ "Can't return %s to lvalue scalar context", | |
937 | is_pp_rv2av ? "array" : "hash"); | |
77e217c6 | 938 | RETURN; |
a0d0e21e LW |
939 | } |
940 | ||
10c8fecd GS |
941 | STATIC void |
942 | S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem) | |
943 | { | |
97aff369 | 944 | dVAR; |
7918f24d NC |
945 | |
946 | PERL_ARGS_ASSERT_DO_ODDBALL; | |
947 | ||
10c8fecd GS |
948 | if (*relem) { |
949 | SV *tmpstr; | |
b464bac0 | 950 | const HE *didstore; |
6d822dc4 MS |
951 | |
952 | if (ckWARN(WARN_MISC)) { | |
a3b680e6 | 953 | const char *err; |
10c8fecd GS |
954 | if (relem == firstrelem && |
955 | SvROK(*relem) && | |
956 | (SvTYPE(SvRV(*relem)) == SVt_PVAV || | |
957 | SvTYPE(SvRV(*relem)) == SVt_PVHV)) | |
958 | { | |
a3b680e6 | 959 | err = "Reference found where even-sized list expected"; |
10c8fecd GS |
960 | } |
961 | else | |
a3b680e6 | 962 | err = "Odd number of elements in hash assignment"; |
f1f66076 | 963 | Perl_warner(aTHX_ packWARN(WARN_MISC), "%s", err); |
10c8fecd | 964 | } |
6d822dc4 | 965 | |
561b68a9 | 966 | tmpstr = newSV(0); |
6d822dc4 MS |
967 | didstore = hv_store_ent(hash,*relem,tmpstr,0); |
968 | if (SvMAGICAL(hash)) { | |
969 | if (SvSMAGICAL(tmpstr)) | |
970 | mg_set(tmpstr); | |
971 | if (!didstore) | |
972 | sv_2mortal(tmpstr); | |
973 | } | |
974 | TAINT_NOT; | |
10c8fecd GS |
975 | } |
976 | } | |
977 | ||
a0d0e21e LW |
978 | PP(pp_aassign) |
979 | { | |
27da23d5 | 980 | dVAR; dSP; |
3280af22 NIS |
981 | SV **lastlelem = PL_stack_sp; |
982 | SV **lastrelem = PL_stack_base + POPMARK; | |
983 | SV **firstrelem = PL_stack_base + POPMARK + 1; | |
a0d0e21e LW |
984 | SV **firstlelem = lastrelem + 1; |
985 | ||
986 | register SV **relem; | |
987 | register SV **lelem; | |
988 | ||
989 | register SV *sv; | |
990 | register AV *ary; | |
991 | ||
54310121 | 992 | I32 gimme; |
a0d0e21e LW |
993 | HV *hash; |
994 | I32 i; | |
995 | int magic; | |
ca65944e | 996 | int duplicates = 0; |
cbbf8932 | 997 | SV **firsthashrelem = NULL; /* "= 0" keeps gcc 2.95 quiet */ |
5637b936 | 998 | |
3280af22 | 999 | PL_delaymagic = DM_DELAY; /* catch simultaneous items */ |
ca65944e | 1000 | gimme = GIMME_V; |
a0d0e21e LW |
1001 | |
1002 | /* If there's a common identifier on both sides we have to take | |
1003 | * special care that assigning the identifier on the left doesn't | |
1004 | * clobber a value on the right that's used later in the list. | |
acdea6f0 | 1005 | * Don't bother if LHS is just an empty hash or array. |
a0d0e21e | 1006 | */ |
acdea6f0 DM |
1007 | |
1008 | if ( (PL_op->op_private & OPpASSIGN_COMMON) | |
1009 | && ( | |
1010 | firstlelem != lastlelem | |
1011 | || ! ((sv = *firstlelem)) | |
1012 | || SvMAGICAL(sv) | |
1013 | || ! (SvTYPE(sv) == SVt_PVAV || SvTYPE(sv) == SVt_PVHV) | |
1014 | || (SvTYPE(sv) == SVt_PVAV && AvFILL((AV*)sv) != -1) | |
1b95d04f | 1015 | || (SvTYPE(sv) == SVt_PVHV && HvUSEDKEYS((HV*)sv) != 0) |
acdea6f0 DM |
1016 | ) |
1017 | ) { | |
cc5e57d2 | 1018 | EXTEND_MORTAL(lastrelem - firstrelem + 1); |
10c8fecd | 1019 | for (relem = firstrelem; relem <= lastrelem; relem++) { |
155aba94 | 1020 | if ((sv = *relem)) { |
a1f49e72 | 1021 | TAINT_NOT; /* Each item is independent */ |
61e5f455 NC |
1022 | |
1023 | /* Dear TODO test in t/op/sort.t, I love you. | |
1024 | (It's relying on a panic, not a "semi-panic" from newSVsv() | |
1025 | and then an assertion failure below.) */ | |
1026 | if (SvIS_FREED(sv)) { | |
1027 | Perl_croak(aTHX_ "panic: attempt to copy freed scalar %p", | |
1028 | (void*)sv); | |
1029 | } | |
1030 | /* Specifically *not* sv_mortalcopy(), as that will steal TEMPs, | |
1031 | and we need a second copy of a temp here. */ | |
1032 | *relem = sv_2mortal(newSVsv(sv)); | |
a1f49e72 | 1033 | } |
10c8fecd | 1034 | } |
a0d0e21e LW |
1035 | } |
1036 | ||
1037 | relem = firstrelem; | |
1038 | lelem = firstlelem; | |
4608196e RGS |
1039 | ary = NULL; |
1040 | hash = NULL; | |
10c8fecd | 1041 | |
a0d0e21e | 1042 | while (lelem <= lastlelem) { |
bbce6d69 | 1043 | TAINT_NOT; /* Each item stands on its own, taintwise. */ |
a0d0e21e LW |
1044 | sv = *lelem++; |
1045 | switch (SvTYPE(sv)) { | |
1046 | case SVt_PVAV: | |
502c6561 | 1047 | ary = MUTABLE_AV(sv); |
748a9306 | 1048 | magic = SvMAGICAL(ary) != 0; |
a0d0e21e | 1049 | av_clear(ary); |
7e42bd57 | 1050 | av_extend(ary, lastrelem - relem); |
a0d0e21e LW |
1051 | i = 0; |
1052 | while (relem <= lastrelem) { /* gobble up all the rest */ | |
5117ca91 | 1053 | SV **didstore; |
a0d0e21e | 1054 | assert(*relem); |
4f0556e9 NC |
1055 | sv = newSV(0); |
1056 | sv_setsv(sv, *relem); | |
a0d0e21e | 1057 | *(relem++) = sv; |
5117ca91 GS |
1058 | didstore = av_store(ary,i++,sv); |
1059 | if (magic) { | |
8ef24240 | 1060 | if (SvSMAGICAL(sv)) |
fb73857a | 1061 | mg_set(sv); |
5117ca91 | 1062 | if (!didstore) |
8127e0e3 | 1063 | sv_2mortal(sv); |
5117ca91 | 1064 | } |
bbce6d69 | 1065 | TAINT_NOT; |
a0d0e21e | 1066 | } |
354b0578 | 1067 | if (PL_delaymagic & DM_ARRAY_ISA) |
ad64d0ec | 1068 | SvSETMAGIC(MUTABLE_SV(ary)); |
a0d0e21e | 1069 | break; |
10c8fecd | 1070 | case SVt_PVHV: { /* normal hash */ |
a0d0e21e | 1071 | SV *tmpstr; |
45960564 | 1072 | SV** topelem = relem; |
a0d0e21e | 1073 | |
85fbaab2 | 1074 | hash = MUTABLE_HV(sv); |
748a9306 | 1075 | magic = SvMAGICAL(hash) != 0; |
a0d0e21e | 1076 | hv_clear(hash); |
ca65944e | 1077 | firsthashrelem = relem; |
a0d0e21e LW |
1078 | |
1079 | while (relem < lastrelem) { /* gobble up all the rest */ | |
5117ca91 | 1080 | HE *didstore; |
6136c704 AL |
1081 | sv = *relem ? *relem : &PL_sv_no; |
1082 | relem++; | |
561b68a9 | 1083 | tmpstr = newSV(0); |
a0d0e21e LW |
1084 | if (*relem) |
1085 | sv_setsv(tmpstr,*relem); /* value */ | |
45960564 DM |
1086 | relem++; |
1087 | if (gimme != G_VOID) { | |
1088 | if (hv_exists_ent(hash, sv, 0)) | |
1089 | /* key overwrites an existing entry */ | |
1090 | duplicates += 2; | |
1091 | else | |
1092 | if (gimme == G_ARRAY) { | |
1093 | /* copy element back: possibly to an earlier | |
1094 | * stack location if we encountered dups earlier */ | |
1095 | *topelem++ = sv; | |
1096 | *topelem++ = tmpstr; | |
1097 | } | |
1098 | } | |
5117ca91 GS |
1099 | didstore = hv_store_ent(hash,sv,tmpstr,0); |
1100 | if (magic) { | |
8ef24240 | 1101 | if (SvSMAGICAL(tmpstr)) |
fb73857a | 1102 | mg_set(tmpstr); |
5117ca91 | 1103 | if (!didstore) |
8127e0e3 | 1104 | sv_2mortal(tmpstr); |
5117ca91 | 1105 | } |
bbce6d69 | 1106 | TAINT_NOT; |
8e07c86e | 1107 | } |
6a0deba8 | 1108 | if (relem == lastrelem) { |
10c8fecd | 1109 | do_oddball(hash, relem, firstrelem); |
6a0deba8 | 1110 | relem++; |
1930e939 | 1111 | } |
a0d0e21e LW |
1112 | } |
1113 | break; | |
1114 | default: | |
6fc92669 GS |
1115 | if (SvIMMORTAL(sv)) { |
1116 | if (relem <= lastrelem) | |
1117 | relem++; | |
1118 | break; | |
a0d0e21e LW |
1119 | } |
1120 | if (relem <= lastrelem) { | |
1c70fb82 FC |
1121 | if ( |
1122 | SvTEMP(sv) && !SvSMAGICAL(sv) && SvREFCNT(sv) == 1 && | |
1123 | (!isGV_with_GP(sv) || SvFAKE(sv)) && ckWARN(WARN_MISC) | |
1124 | ) | |
1125 | Perl_warner(aTHX_ | |
1126 | packWARN(WARN_MISC), | |
1127 | "Useless assignment to a temporary" | |
1128 | ); | |
a0d0e21e LW |
1129 | sv_setsv(sv, *relem); |
1130 | *(relem++) = sv; | |
1131 | } | |
1132 | else | |
3280af22 | 1133 | sv_setsv(sv, &PL_sv_undef); |
8ef24240 | 1134 | SvSETMAGIC(sv); |
a0d0e21e LW |
1135 | break; |
1136 | } | |
1137 | } | |
3280af22 NIS |
1138 | if (PL_delaymagic & ~DM_DELAY) { |
1139 | if (PL_delaymagic & DM_UID) { | |
a0d0e21e | 1140 | #ifdef HAS_SETRESUID |
fb934a90 RD |
1141 | (void)setresuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1, |
1142 | (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1, | |
1143 | (Uid_t)-1); | |
56febc5e AD |
1144 | #else |
1145 | # ifdef HAS_SETREUID | |
fb934a90 RD |
1146 | (void)setreuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1, |
1147 | (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1); | |
56febc5e AD |
1148 | # else |
1149 | # ifdef HAS_SETRUID | |
b28d0864 NIS |
1150 | if ((PL_delaymagic & DM_UID) == DM_RUID) { |
1151 | (void)setruid(PL_uid); | |
1152 | PL_delaymagic &= ~DM_RUID; | |
a0d0e21e | 1153 | } |
56febc5e AD |
1154 | # endif /* HAS_SETRUID */ |
1155 | # ifdef HAS_SETEUID | |
b28d0864 | 1156 | if ((PL_delaymagic & DM_UID) == DM_EUID) { |
fb934a90 | 1157 | (void)seteuid(PL_euid); |
b28d0864 | 1158 | PL_delaymagic &= ~DM_EUID; |
a0d0e21e | 1159 | } |
56febc5e | 1160 | # endif /* HAS_SETEUID */ |
b28d0864 NIS |
1161 | if (PL_delaymagic & DM_UID) { |
1162 | if (PL_uid != PL_euid) | |
cea2e8a9 | 1163 | DIE(aTHX_ "No setreuid available"); |
b28d0864 | 1164 | (void)PerlProc_setuid(PL_uid); |
a0d0e21e | 1165 | } |
56febc5e AD |
1166 | # endif /* HAS_SETREUID */ |
1167 | #endif /* HAS_SETRESUID */ | |
d8eceb89 JH |
1168 | PL_uid = PerlProc_getuid(); |
1169 | PL_euid = PerlProc_geteuid(); | |
a0d0e21e | 1170 | } |
3280af22 | 1171 | if (PL_delaymagic & DM_GID) { |
a0d0e21e | 1172 | #ifdef HAS_SETRESGID |
fb934a90 RD |
1173 | (void)setresgid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1, |
1174 | (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1, | |
1175 | (Gid_t)-1); | |
56febc5e AD |
1176 | #else |
1177 | # ifdef HAS_SETREGID | |
fb934a90 RD |
1178 | (void)setregid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1, |
1179 | (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1); | |
56febc5e AD |
1180 | # else |
1181 | # ifdef HAS_SETRGID | |
b28d0864 NIS |
1182 | if ((PL_delaymagic & DM_GID) == DM_RGID) { |
1183 | (void)setrgid(PL_gid); | |
1184 | PL_delaymagic &= ~DM_RGID; | |
a0d0e21e | 1185 | } |
56febc5e AD |
1186 | # endif /* HAS_SETRGID */ |
1187 | # ifdef HAS_SETEGID | |
b28d0864 | 1188 | if ((PL_delaymagic & DM_GID) == DM_EGID) { |
fb934a90 | 1189 | (void)setegid(PL_egid); |
b28d0864 | 1190 | PL_delaymagic &= ~DM_EGID; |
a0d0e21e | 1191 | } |
56febc5e | 1192 | # endif /* HAS_SETEGID */ |
b28d0864 NIS |
1193 | if (PL_delaymagic & DM_GID) { |
1194 | if (PL_gid != PL_egid) | |
cea2e8a9 | 1195 | DIE(aTHX_ "No setregid available"); |
b28d0864 | 1196 | (void)PerlProc_setgid(PL_gid); |
a0d0e21e | 1197 | } |
56febc5e AD |
1198 | # endif /* HAS_SETREGID */ |
1199 | #endif /* HAS_SETRESGID */ | |
d8eceb89 JH |
1200 | PL_gid = PerlProc_getgid(); |
1201 | PL_egid = PerlProc_getegid(); | |
a0d0e21e | 1202 | } |
3280af22 | 1203 | PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid)); |
a0d0e21e | 1204 | } |
3280af22 | 1205 | PL_delaymagic = 0; |
54310121 | 1206 | |
54310121 | 1207 | if (gimme == G_VOID) |
1208 | SP = firstrelem - 1; | |
1209 | else if (gimme == G_SCALAR) { | |
1210 | dTARGET; | |
1211 | SP = firstrelem; | |
ca65944e | 1212 | SETi(lastrelem - firstrelem + 1 - duplicates); |
54310121 | 1213 | } |
1214 | else { | |
ca65944e | 1215 | if (ary) |
a0d0e21e | 1216 | SP = lastrelem; |
ca65944e RGS |
1217 | else if (hash) { |
1218 | if (duplicates) { | |
45960564 DM |
1219 | /* at this point we have removed the duplicate key/value |
1220 | * pairs from the stack, but the remaining values may be | |
1221 | * wrong; i.e. with (a 1 a 2 b 3) on the stack we've removed | |
1222 | * the (a 2), but the stack now probably contains | |
1223 | * (a <freed> b 3), because { hv_save(a,1); hv_save(a,2) } | |
1224 | * obliterates the earlier key. So refresh all values. */ | |
ca65944e | 1225 | lastrelem -= duplicates; |
45960564 DM |
1226 | relem = firsthashrelem; |
1227 | while (relem < lastrelem) { | |
1228 | HE *he; | |
1229 | sv = *relem++; | |
1230 | he = hv_fetch_ent(hash, sv, 0, 0); | |
1231 | *relem++ = (he ? HeVAL(he) : &PL_sv_undef); | |
1232 | } | |
ca65944e RGS |
1233 | } |
1234 | SP = lastrelem; | |
1235 | } | |
a0d0e21e LW |
1236 | else |
1237 | SP = firstrelem + (lastlelem - firstlelem); | |
0c8c7a05 | 1238 | lelem = firstlelem + (relem - firstrelem); |
5f05dabc | 1239 | while (relem <= SP) |
3280af22 | 1240 | *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef; |
a0d0e21e | 1241 | } |
08aeb9f7 | 1242 | |
54310121 | 1243 | RETURN; |
a0d0e21e LW |
1244 | } |
1245 | ||
8782bef2 GB |
1246 | PP(pp_qr) |
1247 | { | |
97aff369 | 1248 | dVAR; dSP; |
c4420975 | 1249 | register PMOP * const pm = cPMOP; |
fe578d7f | 1250 | REGEXP * rx = PM_GETRE(pm); |
10599a69 | 1251 | SV * const pkg = rx ? CALLREG_PACKAGE(rx) : NULL; |
c4420975 | 1252 | SV * const rv = sv_newmortal(); |
288b8c02 NC |
1253 | |
1254 | SvUPGRADE(rv, SVt_IV); | |
c2123ae3 NC |
1255 | /* For a subroutine describing itself as "This is a hacky workaround" I'm |
1256 | loathe to use it here, but it seems to be the right fix. Or close. | |
1257 | The key part appears to be that it's essential for pp_qr to return a new | |
1258 | object (SV), which implies that there needs to be an effective way to | |
1259 | generate a new SV from the existing SV that is pre-compiled in the | |
1260 | optree. */ | |
1261 | SvRV_set(rv, MUTABLE_SV(reg_temp_copy(NULL, rx))); | |
288b8c02 NC |
1262 | SvROK_on(rv); |
1263 | ||
1264 | if (pkg) { | |
f815daf2 | 1265 | HV *const stash = gv_stashsv(pkg, GV_ADD); |
a954f6ee | 1266 | SvREFCNT_dec(pkg); |
288b8c02 NC |
1267 | (void)sv_bless(rv, stash); |
1268 | } | |
1269 | ||
9274aefd | 1270 | if (RX_EXTFLAGS(rx) & RXf_TAINTED) { |
e08e52cf | 1271 | SvTAINTED_on(rv); |
9274aefd DM |
1272 | SvTAINTED_on(SvRV(rv)); |
1273 | } | |
c8c13c22 JB |
1274 | XPUSHs(rv); |
1275 | RETURN; | |
8782bef2 GB |
1276 | } |
1277 | ||
a0d0e21e LW |
1278 | PP(pp_match) |
1279 | { | |
97aff369 | 1280 | dVAR; dSP; dTARG; |
a0d0e21e | 1281 | register PMOP *pm = cPMOP; |
d65afb4b | 1282 | PMOP *dynpm = pm; |
0d46e09a SP |
1283 | register const char *t; |
1284 | register const char *s; | |
5c144d81 | 1285 | const char *strend; |
a0d0e21e | 1286 | I32 global; |
1ed74d04 | 1287 | U8 r_flags = REXEC_CHECKED; |
5c144d81 | 1288 | const char *truebase; /* Start of string */ |
aaa362c4 | 1289 | register REGEXP *rx = PM_GETRE(pm); |
b3eb6a9b | 1290 | bool rxtainted; |
a3b680e6 | 1291 | const I32 gimme = GIMME; |
a0d0e21e | 1292 | STRLEN len; |
748a9306 | 1293 | I32 minmatch = 0; |
a3b680e6 | 1294 | const I32 oldsave = PL_savestack_ix; |
f86702cc | 1295 | I32 update_minmatch = 1; |
e60df1fa | 1296 | I32 had_zerolen = 0; |
58e23c8d | 1297 | U32 gpos = 0; |
a0d0e21e | 1298 | |
533c011a | 1299 | if (PL_op->op_flags & OPf_STACKED) |
a0d0e21e | 1300 | TARG = POPs; |
59f00321 RGS |
1301 | else if (PL_op->op_private & OPpTARGET_MY) |
1302 | GETTARGET; | |
a0d0e21e | 1303 | else { |
54b9620d | 1304 | TARG = DEFSV; |
a0d0e21e LW |
1305 | EXTEND(SP,1); |
1306 | } | |
d9f424b2 | 1307 | |
c277df42 | 1308 | PUTBACK; /* EVAL blocks need stack_sp. */ |
69dc4b30 FC |
1309 | /* Skip get-magic if this is a qr// clone, because regcomp has |
1310 | already done it. */ | |
1311 | s = ((struct regexp *)SvANY(rx))->mother_re | |
1312 | ? SvPV_nomg_const(TARG, len) | |
1313 | : SvPV_const(TARG, len); | |
a0d0e21e | 1314 | if (!s) |
2269b42e | 1315 | DIE(aTHX_ "panic: pp_match"); |
890ce7af | 1316 | strend = s + len; |
07bc277f | 1317 | rxtainted = ((RX_EXTFLAGS(rx) & RXf_TAINTED) || |
3280af22 | 1318 | (PL_tainted && (pm->op_pmflags & PMf_RETAINT))); |
9212bbba | 1319 | TAINT_NOT; |
a0d0e21e | 1320 | |
a30b2f1f | 1321 | RX_MATCH_UTF8_set(rx, DO_UTF8(TARG)); |
d9f424b2 | 1322 | |
d65afb4b | 1323 | /* PMdf_USED is set after a ?? matches once */ |
c737faaf YO |
1324 | if ( |
1325 | #ifdef USE_ITHREADS | |
1326 | SvREADONLY(PL_regex_pad[pm->op_pmoffset]) | |
1327 | #else | |
1328 | pm->op_pmflags & PMf_USED | |
1329 | #endif | |
1330 | ) { | |
c277df42 | 1331 | failure: |
a0d0e21e LW |
1332 | if (gimme == G_ARRAY) |
1333 | RETURN; | |
1334 | RETPUSHNO; | |
1335 | } | |
1336 | ||
c737faaf YO |
1337 | |
1338 | ||
d65afb4b | 1339 | /* empty pattern special-cased to use last successful pattern if possible */ |
220fc49f | 1340 | if (!RX_PRELEN(rx) && PL_curpm) { |
3280af22 | 1341 | pm = PL_curpm; |
aaa362c4 | 1342 | rx = PM_GETRE(pm); |
a0d0e21e | 1343 | } |
d65afb4b | 1344 | |
07bc277f | 1345 | if (RX_MINLEN(rx) > (I32)len) |
d65afb4b | 1346 | goto failure; |
c277df42 | 1347 | |
a0d0e21e | 1348 | truebase = t = s; |
ad94a511 IZ |
1349 | |
1350 | /* XXXX What part of this is needed with true \G-support? */ | |
d65afb4b | 1351 | if ((global = dynpm->op_pmflags & PMf_GLOBAL)) { |
07bc277f | 1352 | RX_OFFS(rx)[0].start = -1; |
a0d0e21e | 1353 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) { |
c445ea15 | 1354 | MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global); |
565764a8 | 1355 | if (mg && mg->mg_len >= 0) { |
07bc277f NC |
1356 | if (!(RX_EXTFLAGS(rx) & RXf_GPOS_SEEN)) |
1357 | RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len; | |
1358 | else if (RX_EXTFLAGS(rx) & RXf_ANCH_GPOS) { | |
0ef3e39e | 1359 | r_flags |= REXEC_IGNOREPOS; |
07bc277f NC |
1360 | RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len; |
1361 | } else if (RX_EXTFLAGS(rx) & RXf_GPOS_FLOAT) | |
58e23c8d YO |
1362 | gpos = mg->mg_len; |
1363 | else | |
07bc277f NC |
1364 | RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len; |
1365 | minmatch = (mg->mg_flags & MGf_MINMATCH) ? RX_GOFS(rx) + 1 : 0; | |
f86702cc | 1366 | update_minmatch = 0; |
748a9306 | 1367 | } |
a0d0e21e LW |
1368 | } |
1369 | } | |
a229a030 | 1370 | /* XXX: comment out !global get safe $1 vars after a |
62e7980d | 1371 | match, BUT be aware that this leads to dramatic slowdowns on |
a229a030 YO |
1372 | /g matches against large strings. So far a solution to this problem |
1373 | appears to be quite tricky. | |
1374 | Test for the unsafe vars are TODO for now. */ | |
0d8a731b DM |
1375 | if ( (!global && RX_NPARENS(rx)) |
1376 | || SvTEMP(TARG) || SvAMAGIC(TARG) || PL_sawampersand | |
1377 | || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY))) | |
14977893 | 1378 | r_flags |= REXEC_COPY_STR; |
1c846c1f | 1379 | if (SvSCREAM(TARG)) |
22e551b9 IZ |
1380 | r_flags |= REXEC_SCREAM; |
1381 | ||
d7be1480 | 1382 | play_it_again: |
07bc277f NC |
1383 | if (global && RX_OFFS(rx)[0].start != -1) { |
1384 | t = s = RX_OFFS(rx)[0].end + truebase - RX_GOFS(rx); | |
1385 | if ((s + RX_MINLEN(rx)) > strend || s < truebase) | |
a0d0e21e | 1386 | goto nope; |
f86702cc | 1387 | if (update_minmatch++) |
e60df1fa | 1388 | minmatch = had_zerolen; |
a0d0e21e | 1389 | } |
07bc277f | 1390 | if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT && |
3c8556c3 | 1391 | DO_UTF8(TARG) == (RX_UTF8(rx) != 0)) { |
5c144d81 NC |
1392 | /* FIXME - can PL_bostr be made const char *? */ |
1393 | PL_bostr = (char *)truebase; | |
f9f4320a | 1394 | s = CALLREG_INTUIT_START(rx, TARG, (char *)s, (char *)strend, r_flags, NULL); |
f722798b IZ |
1395 | |
1396 | if (!s) | |
1397 | goto nope; | |
07bc277f | 1398 | if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL) |
14977893 | 1399 | && !PL_sawampersand |
07bc277f NC |
1400 | && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) |
1401 | && ((RX_EXTFLAGS(rx) & RXf_NOSCAN) | |
1402 | || !((RX_EXTFLAGS(rx) & RXf_INTUIT_TAIL) | |
05b4157f GS |
1403 | && (r_flags & REXEC_SCREAM))) |
1404 | && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */ | |
f722798b | 1405 | goto yup; |
a0d0e21e | 1406 | } |
1f36f092 RB |
1407 | if (CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase, |
1408 | minmatch, TARG, NUM2PTR(void*, gpos), r_flags)) | |
bbce6d69 | 1409 | { |
3280af22 | 1410 | PL_curpm = pm; |
c737faaf YO |
1411 | if (dynpm->op_pmflags & PMf_ONCE) { |
1412 | #ifdef USE_ITHREADS | |
1413 | SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]); | |
1414 | #else | |
1415 | dynpm->op_pmflags |= PMf_USED; | |
1416 | #endif | |
1417 | } | |
a0d0e21e LW |
1418 | goto gotcha; |
1419 | } | |
1420 | else | |
1421 | goto ret_no; | |
1422 | /*NOTREACHED*/ | |
1423 | ||
1424 | gotcha: | |
72311751 GS |
1425 | if (rxtainted) |
1426 | RX_MATCH_TAINTED_on(rx); | |
1427 | TAINT_IF(RX_MATCH_TAINTED(rx)); | |
a0d0e21e | 1428 | if (gimme == G_ARRAY) { |
07bc277f | 1429 | const I32 nparens = RX_NPARENS(rx); |
a3b680e6 | 1430 | I32 i = (global && !nparens) ? 1 : 0; |
a0d0e21e | 1431 | |
c277df42 | 1432 | SPAGAIN; /* EVAL blocks could move the stack. */ |
ffc61ed2 JH |
1433 | EXTEND(SP, nparens + i); |
1434 | EXTEND_MORTAL(nparens + i); | |
1435 | for (i = !i; i <= nparens; i++) { | |
a0d0e21e | 1436 | PUSHs(sv_newmortal()); |
07bc277f NC |
1437 | if ((RX_OFFS(rx)[i].start != -1) && RX_OFFS(rx)[i].end != -1 ) { |
1438 | const I32 len = RX_OFFS(rx)[i].end - RX_OFFS(rx)[i].start; | |
1439 | s = RX_OFFS(rx)[i].start + truebase; | |
1440 | if (RX_OFFS(rx)[i].end < 0 || RX_OFFS(rx)[i].start < 0 || | |
290deeac A |
1441 | len < 0 || len > strend - s) |
1442 | DIE(aTHX_ "panic: pp_match start/end pointers"); | |
a0d0e21e | 1443 | sv_setpvn(*SP, s, len); |
cce850e4 | 1444 | if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len)) |
a197cbdd | 1445 | SvUTF8_on(*SP); |
a0d0e21e LW |
1446 | } |
1447 | } | |
1448 | if (global) { | |
d65afb4b | 1449 | if (dynpm->op_pmflags & PMf_CONTINUE) { |
6136c704 | 1450 | MAGIC* mg = NULL; |
0af80b60 HS |
1451 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) |
1452 | mg = mg_find(TARG, PERL_MAGIC_regex_global); | |
1453 | if (!mg) { | |
d83f0a82 NC |
1454 | #ifdef PERL_OLD_COPY_ON_WRITE |
1455 | if (SvIsCOW(TARG)) | |
1456 | sv_force_normal_flags(TARG, 0); | |
1457 | #endif | |
1458 | mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global, | |
1459 | &PL_vtbl_mglob, NULL, 0); | |
0af80b60 | 1460 | } |
07bc277f NC |
1461 | if (RX_OFFS(rx)[0].start != -1) { |
1462 | mg->mg_len = RX_OFFS(rx)[0].end; | |
1463 | if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end) | |
0af80b60 HS |
1464 | mg->mg_flags |= MGf_MINMATCH; |
1465 | else | |
1466 | mg->mg_flags &= ~MGf_MINMATCH; | |
1467 | } | |
1468 | } | |
07bc277f NC |
1469 | had_zerolen = (RX_OFFS(rx)[0].start != -1 |
1470 | && (RX_OFFS(rx)[0].start + RX_GOFS(rx) | |
1471 | == (UV)RX_OFFS(rx)[0].end)); | |
c277df42 | 1472 | PUTBACK; /* EVAL blocks may use stack */ |
cf93c79d | 1473 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
a0d0e21e LW |
1474 | goto play_it_again; |
1475 | } | |
ffc61ed2 | 1476 | else if (!nparens) |
bde848c5 | 1477 | XPUSHs(&PL_sv_yes); |
4633a7c4 | 1478 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
1479 | RETURN; |
1480 | } | |
1481 | else { | |
1482 | if (global) { | |
cbbf8932 | 1483 | MAGIC* mg; |
a0d0e21e | 1484 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) |
14befaf4 | 1485 | mg = mg_find(TARG, PERL_MAGIC_regex_global); |
cbbf8932 AL |
1486 | else |
1487 | mg = NULL; | |
a0d0e21e | 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); | |
a0d0e21e | 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) | |
748a9306 LW |
1499 | mg->mg_flags |= MGf_MINMATCH; |
1500 | else | |
1501 | mg->mg_flags &= ~MGf_MINMATCH; | |
1502 | } | |
a0d0e21e | 1503 | } |
4633a7c4 | 1504 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
1505 | RETPUSHYES; |
1506 | } | |
1507 | ||
f722798b | 1508 | yup: /* Confirmed by INTUIT */ |
72311751 GS |
1509 | if (rxtainted) |
1510 | RX_MATCH_TAINTED_on(rx); | |
1511 | TAINT_IF(RX_MATCH_TAINTED(rx)); | |
3280af22 | 1512 | PL_curpm = pm; |
c737faaf YO |
1513 | if (dynpm->op_pmflags & PMf_ONCE) { |
1514 | #ifdef USE_ITHREADS | |
1515 | SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]); | |
1516 | #else | |
1517 | dynpm->op_pmflags |= PMf_USED; | |
1518 | #endif | |
1519 | } | |
cf93c79d | 1520 | if (RX_MATCH_COPIED(rx)) |
07bc277f | 1521 | Safefree(RX_SUBBEG(rx)); |
cf93c79d | 1522 | RX_MATCH_COPIED_off(rx); |
07bc277f | 1523 | RX_SUBBEG(rx) = NULL; |
a0d0e21e | 1524 | if (global) { |
5c144d81 | 1525 | /* FIXME - should rx->subbeg be const char *? */ |
07bc277f NC |
1526 | RX_SUBBEG(rx) = (char *) truebase; |
1527 | RX_OFFS(rx)[0].start = s - truebase; | |
a30b2f1f | 1528 | if (RX_MATCH_UTF8(rx)) { |
07bc277f NC |
1529 | char * const t = (char*)utf8_hop((U8*)s, RX_MINLENRET(rx)); |
1530 | RX_OFFS(rx)[0].end = t - truebase; | |
60aeb6fd NIS |
1531 | } |
1532 | else { | |
07bc277f | 1533 | RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx); |
60aeb6fd | 1534 | } |
07bc277f | 1535 | RX_SUBLEN(rx) = strend - truebase; |
a0d0e21e | 1536 | goto gotcha; |
1c846c1f | 1537 | } |
07bc277f | 1538 | if (PL_sawampersand || RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) { |
14977893 | 1539 | I32 off; |
f8c7b90f | 1540 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
1541 | if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) { |
1542 | if (DEBUG_C_TEST) { | |
1543 | PerlIO_printf(Perl_debug_log, | |
1544 | "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n", | |
6c9570dc | 1545 | (int) SvTYPE(TARG), (void*)truebase, (void*)t, |
ed252734 NC |
1546 | (int)(t-truebase)); |
1547 | } | |
bdd9a1b1 NC |
1548 | RX_SAVED_COPY(rx) = sv_setsv_cow(RX_SAVED_COPY(rx), TARG); |
1549 | RX_SUBBEG(rx) | |
1550 | = (char *) SvPVX_const(RX_SAVED_COPY(rx)) + (t - truebase); | |
1551 | assert (SvPOKp(RX_SAVED_COPY(rx))); | |
ed252734 NC |
1552 | } else |
1553 | #endif | |
1554 | { | |
14977893 | 1555 | |
07bc277f | 1556 | RX_SUBBEG(rx) = savepvn(t, strend - t); |
f8c7b90f | 1557 | #ifdef PERL_OLD_COPY_ON_WRITE |
bdd9a1b1 | 1558 | RX_SAVED_COPY(rx) = NULL; |
ed252734 NC |
1559 | #endif |
1560 | } | |
07bc277f | 1561 | RX_SUBLEN(rx) = strend - t; |
14977893 | 1562 | RX_MATCH_COPIED_on(rx); |
07bc277f NC |
1563 | off = RX_OFFS(rx)[0].start = s - t; |
1564 | RX_OFFS(rx)[0].end = off + RX_MINLENRET(rx); | |
14977893 JH |
1565 | } |
1566 | else { /* startp/endp are used by @- @+. */ | |
07bc277f NC |
1567 | RX_OFFS(rx)[0].start = s - truebase; |
1568 | RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx); | |
14977893 | 1569 | } |
07bc277f | 1570 | /* including RX_NPARENS(rx) in the below code seems highly suspicious. |
cde0cee5 | 1571 | -dmq */ |
07bc277f | 1572 | RX_NPARENS(rx) = RX_LASTPAREN(rx) = RX_LASTCLOSEPAREN(rx) = 0; /* used by @-, @+, and $^N */ |
4633a7c4 | 1573 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
1574 | RETPUSHYES; |
1575 | ||
1576 | nope: | |
a0d0e21e | 1577 | ret_no: |
d65afb4b | 1578 | if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) { |
a0d0e21e | 1579 | if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) { |
6136c704 | 1580 | MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global); |
a0d0e21e | 1581 | if (mg) |
565764a8 | 1582 | mg->mg_len = -1; |
a0d0e21e LW |
1583 | } |
1584 | } | |
4633a7c4 | 1585 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
1586 | if (gimme == G_ARRAY) |
1587 | RETURN; | |
1588 | RETPUSHNO; | |
1589 | } | |
1590 | ||
1591 | OP * | |
864dbfa3 | 1592 | Perl_do_readline(pTHX) |
a0d0e21e | 1593 | { |
27da23d5 | 1594 | dVAR; dSP; dTARGETSTACKED; |
a0d0e21e LW |
1595 | register SV *sv; |
1596 | STRLEN tmplen = 0; | |
1597 | STRLEN offset; | |
760ac839 | 1598 | PerlIO *fp; |
a3b680e6 AL |
1599 | register IO * const io = GvIO(PL_last_in_gv); |
1600 | register const I32 type = PL_op->op_type; | |
1601 | const I32 gimme = GIMME_V; | |
a0d0e21e | 1602 | |
6136c704 | 1603 | if (io) { |
50db69d8 | 1604 | const MAGIC *const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar); |
6136c704 | 1605 | if (mg) { |
50db69d8 | 1606 | Perl_tied_method(aTHX_ "READLINE", SP, MUTABLE_SV(io), mg, gimme, 0); |
6136c704 | 1607 | if (gimme == G_SCALAR) { |
50db69d8 NC |
1608 | SPAGAIN; |
1609 | SvSetSV_nosteal(TARG, TOPs); | |
1610 | SETTARG; | |
6136c704 | 1611 | } |
50db69d8 | 1612 | return NORMAL; |
0b7c7b4f | 1613 | } |
e79b0511 | 1614 | } |
4608196e | 1615 | fp = NULL; |
a0d0e21e LW |
1616 | if (io) { |
1617 | fp = IoIFP(io); | |
1618 | if (!fp) { | |
1619 | if (IoFLAGS(io) & IOf_ARGV) { | |
1620 | if (IoFLAGS(io) & IOf_START) { | |
a0d0e21e | 1621 | IoLINES(io) = 0; |
3280af22 | 1622 | if (av_len(GvAVn(PL_last_in_gv)) < 0) { |
1d7c1841 | 1623 | IoFLAGS(io) &= ~IOf_START; |
4608196e | 1624 | do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,NULL); |
76f68e9b | 1625 | sv_setpvs(GvSVn(PL_last_in_gv), "-"); |
3280af22 | 1626 | SvSETMAGIC(GvSV(PL_last_in_gv)); |
a2008d6d GS |
1627 | fp = IoIFP(io); |
1628 | goto have_fp; | |
a0d0e21e LW |
1629 | } |
1630 | } | |
3280af22 | 1631 | fp = nextargv(PL_last_in_gv); |
a0d0e21e | 1632 | if (!fp) { /* Note: fp != IoIFP(io) */ |
3280af22 | 1633 | (void)do_close(PL_last_in_gv, FALSE); /* now it does*/ |
a0d0e21e LW |
1634 | } |
1635 | } | |
0d44d22b NC |
1636 | else if (type == OP_GLOB) |
1637 | fp = Perl_start_glob(aTHX_ POPs, io); | |
a0d0e21e LW |
1638 | } |
1639 | else if (type == OP_GLOB) | |
1640 | SP--; | |
7716c5c5 | 1641 | else if (IoTYPE(io) == IoTYPE_WRONLY) { |
a5390457 | 1642 | report_wrongway_fh(PL_last_in_gv, '>'); |
a00b5bd3 | 1643 | } |
a0d0e21e LW |
1644 | } |
1645 | if (!fp) { | |
041457d9 DM |
1646 | if ((!io || !(IoFLAGS(io) & IOf_START)) |
1647 | && ckWARN2(WARN_GLOB, WARN_CLOSED)) | |
1648 | { | |
3f4520fe | 1649 | if (type == OP_GLOB) |
9014280d | 1650 | Perl_warner(aTHX_ packWARN(WARN_GLOB), |
af8c498a GS |
1651 | "glob failed (can't start child: %s)", |
1652 | Strerror(errno)); | |
69282e91 | 1653 | else |
831e4cc3 | 1654 | report_evil_fh(PL_last_in_gv); |
3f4520fe | 1655 | } |
54310121 | 1656 | if (gimme == G_SCALAR) { |
79628082 | 1657 | /* undef TARG, and push that undefined value */ |
ba92458f AE |
1658 | if (type != OP_RCATLINE) { |
1659 | SV_CHECK_THINKFIRST_COW_DROP(TARG); | |
0c34ef67 | 1660 | SvOK_off(TARG); |
ba92458f | 1661 | } |
a0d0e21e LW |
1662 | PUSHTARG; |
1663 | } | |
1664 | RETURN; | |
1665 | } | |
a2008d6d | 1666 | have_fp: |
54310121 | 1667 | if (gimme == G_SCALAR) { |
a0d0e21e | 1668 | sv = TARG; |
0f722b55 RGS |
1669 | if (type == OP_RCATLINE && SvGMAGICAL(sv)) |
1670 | mg_get(sv); | |
48de12d9 RGS |
1671 | if (SvROK(sv)) { |
1672 | if (type == OP_RCATLINE) | |
1673 | SvPV_force_nolen(sv); | |
1674 | else | |
1675 | sv_unref(sv); | |
1676 | } | |
f7877b28 NC |
1677 | else if (isGV_with_GP(sv)) { |
1678 | SvPV_force_nolen(sv); | |
1679 | } | |
862a34c6 | 1680 | SvUPGRADE(sv, SVt_PV); |
a0d0e21e | 1681 | tmplen = SvLEN(sv); /* remember if already alloced */ |
f72e8700 JJ |
1682 | if (!tmplen && !SvREADONLY(sv)) { |
1683 | /* try short-buffering it. Please update t/op/readline.t | |
1684 | * if you change the growth length. | |
1685 | */ | |
1686 | Sv_Grow(sv, 80); | |
1687 | } | |
2b5e58c4 AMS |
1688 | offset = 0; |
1689 | if (type == OP_RCATLINE && SvOK(sv)) { | |
1690 | if (!SvPOK(sv)) { | |
8b6b16e7 | 1691 | SvPV_force_nolen(sv); |
2b5e58c4 | 1692 | } |
a0d0e21e | 1693 | offset = SvCUR(sv); |
2b5e58c4 | 1694 | } |
a0d0e21e | 1695 | } |
54310121 | 1696 | else { |
561b68a9 | 1697 | sv = sv_2mortal(newSV(80)); |
54310121 | 1698 | offset = 0; |
1699 | } | |
fbad3eb5 | 1700 | |
3887d568 AP |
1701 | /* This should not be marked tainted if the fp is marked clean */ |
1702 | #define MAYBE_TAINT_LINE(io, sv) \ | |
1703 | if (!(IoFLAGS(io) & IOf_UNTAINT)) { \ | |
1704 | TAINT; \ | |
1705 | SvTAINTED_on(sv); \ | |
1706 | } | |
1707 | ||
684bef36 | 1708 | /* delay EOF state for a snarfed empty file */ |
fbad3eb5 | 1709 | #define SNARF_EOF(gimme,rs,io,sv) \ |
684bef36 | 1710 | (gimme != G_SCALAR || SvCUR(sv) \ |
b9fee9ba | 1711 | || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs)) |
fbad3eb5 | 1712 | |
a0d0e21e | 1713 | for (;;) { |
09e8efcc | 1714 | PUTBACK; |
fbad3eb5 | 1715 | if (!sv_gets(sv, fp, offset) |
2d726892 TF |
1716 | && (type == OP_GLOB |
1717 | || SNARF_EOF(gimme, PL_rs, io, sv) | |
1718 | || PerlIO_error(fp))) | |
fbad3eb5 | 1719 | { |
760ac839 | 1720 | PerlIO_clearerr(fp); |
a0d0e21e | 1721 | if (IoFLAGS(io) & IOf_ARGV) { |
3280af22 | 1722 | fp = nextargv(PL_last_in_gv); |
a0d0e21e LW |
1723 | if (fp) |
1724 | continue; | |
3280af22 | 1725 | (void)do_close(PL_last_in_gv, FALSE); |
a0d0e21e LW |
1726 | } |
1727 | else if (type == OP_GLOB) { | |
a2a5de95 NC |
1728 | if (!do_close(PL_last_in_gv, FALSE)) { |
1729 | Perl_ck_warner(aTHX_ packWARN(WARN_GLOB), | |
1730 | "glob failed (child exited with status %d%s)", | |
1731 | (int)(STATUS_CURRENT >> 8), | |
1732 | (STATUS_CURRENT & 0x80) ? ", core dumped" : ""); | |
4eb79ab5 | 1733 | } |
a0d0e21e | 1734 | } |
54310121 | 1735 | if (gimme == G_SCALAR) { |
ba92458f AE |
1736 | if (type != OP_RCATLINE) { |
1737 | SV_CHECK_THINKFIRST_COW_DROP(TARG); | |
0c34ef67 | 1738 | SvOK_off(TARG); |
ba92458f | 1739 | } |
09e8efcc | 1740 | SPAGAIN; |
a0d0e21e LW |
1741 | PUSHTARG; |
1742 | } | |
3887d568 | 1743 | MAYBE_TAINT_LINE(io, sv); |
a0d0e21e LW |
1744 | RETURN; |
1745 | } | |
3887d568 | 1746 | MAYBE_TAINT_LINE(io, sv); |
a0d0e21e | 1747 | IoLINES(io)++; |
b9fee9ba | 1748 | IoFLAGS(io) |= IOf_NOLINE; |
71be2cbc | 1749 | SvSETMAGIC(sv); |
09e8efcc | 1750 | SPAGAIN; |
a0d0e21e | 1751 | XPUSHs(sv); |
a0d0e21e | 1752 | if (type == OP_GLOB) { |
349d4f2f | 1753 | const char *t1; |
a0d0e21e | 1754 | |
3280af22 | 1755 | if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) { |
6136c704 | 1756 | char * const tmps = SvEND(sv) - 1; |
aa07b2f6 | 1757 | if (*tmps == *SvPVX_const(PL_rs)) { |
c07a80fd | 1758 | *tmps = '\0'; |
b162af07 | 1759 | SvCUR_set(sv, SvCUR(sv) - 1); |
c07a80fd | 1760 | } |
1761 | } | |
349d4f2f NC |
1762 | for (t1 = SvPVX_const(sv); *t1; t1++) |
1763 | if (!isALPHA(*t1) && !isDIGIT(*t1) && | |
1764 | strchr("$&*(){}[]'\";\\|?<>~`", *t1)) | |
a0d0e21e | 1765 | break; |
349d4f2f | 1766 | if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) { |
a0d0e21e LW |
1767 | (void)POPs; /* Unmatched wildcard? Chuck it... */ |
1768 | continue; | |
1769 | } | |
2d79bf7f | 1770 | } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */ |
d4c19fe8 AL |
1771 | if (ckWARN(WARN_UTF8)) { |
1772 | const U8 * const s = (const U8*)SvPVX_const(sv) + offset; | |
1773 | const STRLEN len = SvCUR(sv) - offset; | |
1774 | const U8 *f; | |
1775 | ||
1776 | if (!is_utf8_string_loc(s, len, &f)) | |
1777 | /* Emulate :encoding(utf8) warning in the same case. */ | |
1778 | Perl_warner(aTHX_ packWARN(WARN_UTF8), | |
1779 | "utf8 \"\\x%02X\" does not map to Unicode", | |
1780 | f < (U8*)SvEND(sv) ? *f : 0); | |
1781 | } | |
a0d0e21e | 1782 | } |
54310121 | 1783 | if (gimme == G_ARRAY) { |
a0d0e21e | 1784 | if (SvLEN(sv) - SvCUR(sv) > 20) { |
1da4ca5f | 1785 | SvPV_shrink_to_cur(sv); |
a0d0e21e | 1786 | } |
561b68a9 | 1787 | sv = sv_2mortal(newSV(80)); |
a0d0e21e LW |
1788 | continue; |
1789 | } | |
54310121 | 1790 | else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) { |
a0d0e21e | 1791 | /* try to reclaim a bit of scalar space (only on 1st alloc) */ |
d5b5861b NC |
1792 | const STRLEN new_len |
1793 | = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */ | |
1da4ca5f | 1794 | SvPV_renew(sv, new_len); |
a0d0e21e LW |
1795 | } |
1796 | RETURN; | |
1797 | } | |
1798 | } | |
1799 | ||
1800 | PP(pp_enter) | |
1801 | { | |
27da23d5 | 1802 | dVAR; dSP; |
c09156bb | 1803 | register PERL_CONTEXT *cx; |
533c011a | 1804 | I32 gimme = OP_GIMME(PL_op, -1); |
a0d0e21e | 1805 | |
54310121 | 1806 | if (gimme == -1) { |
e91684bf VP |
1807 | if (cxstack_ix >= 0) { |
1808 | /* If this flag is set, we're just inside a return, so we should | |
1809 | * store the caller's context */ | |
1810 | gimme = (PL_op->op_flags & OPf_SPECIAL) | |
1811 | ? block_gimme() | |
1812 | : cxstack[cxstack_ix].blk_gimme; | |
1813 | } else | |
54310121 | 1814 | gimme = G_SCALAR; |
1815 | } | |
a0d0e21e | 1816 | |
d343c3ef | 1817 | ENTER_with_name("block"); |
a0d0e21e LW |
1818 | |
1819 | SAVETMPS; | |
924508f0 | 1820 | PUSHBLOCK(cx, CXt_BLOCK, SP); |
a0d0e21e LW |
1821 | |
1822 | RETURN; | |
1823 | } | |
1824 | ||
1825 | PP(pp_helem) | |
1826 | { | |
97aff369 | 1827 | dVAR; dSP; |
760ac839 | 1828 | HE* he; |
ae77835f | 1829 | SV **svp; |
c445ea15 | 1830 | SV * const keysv = POPs; |
85fbaab2 | 1831 | HV * const hv = MUTABLE_HV(POPs); |
a3b680e6 AL |
1832 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
1833 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
be6c24e0 | 1834 | SV *sv; |
c158a4fd | 1835 | const U32 hash = (SvIsCOW_shared_hash(keysv)) ? SvSHARED_HASH(keysv) : 0; |
92970b93 | 1836 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
d30e492c | 1837 | bool preeminent = TRUE; |
a0d0e21e | 1838 | |
d4c19fe8 | 1839 | if (SvTYPE(hv) != SVt_PVHV) |
a0d0e21e | 1840 | RETPUSHUNDEF; |
d4c19fe8 | 1841 | |
92970b93 | 1842 | if (localizing) { |
d4c19fe8 AL |
1843 | MAGIC *mg; |
1844 | HV *stash; | |
d30e492c VP |
1845 | |
1846 | /* If we can determine whether the element exist, | |
1847 | * Try to preserve the existenceness of a tied hash | |
1848 | * element by using EXISTS and DELETE if possible. | |
1849 | * Fallback to FETCH and STORE otherwise. */ | |
1850 | if (SvCANEXISTDELETE(hv) || mg_find((const SV *)hv, PERL_MAGIC_env)) | |
1851 | preeminent = hv_exists_ent(hv, keysv, 0); | |
d4c19fe8 | 1852 | } |
d30e492c | 1853 | |
d4c19fe8 AL |
1854 | he = hv_fetch_ent(hv, keysv, lval && !defer, hash); |
1855 | svp = he ? &HeVAL(he) : NULL; | |
a0d0e21e | 1856 | if (lval) { |
3280af22 | 1857 | if (!svp || *svp == &PL_sv_undef) { |
68dc0745 | 1858 | SV* lv; |
1859 | SV* key2; | |
2d8e6c8d | 1860 | if (!defer) { |
be2597df | 1861 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); |
2d8e6c8d | 1862 | } |
68dc0745 | 1863 | lv = sv_newmortal(); |
1864 | sv_upgrade(lv, SVt_PVLV); | |
1865 | LvTYPE(lv) = 'y'; | |
6136c704 | 1866 | sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0); |
68dc0745 | 1867 | SvREFCNT_dec(key2); /* sv_magic() increments refcount */ |
b37c2d43 | 1868 | LvTARG(lv) = SvREFCNT_inc_simple(hv); |
68dc0745 | 1869 | LvTARGLEN(lv) = 1; |
1870 | PUSHs(lv); | |
1871 | RETURN; | |
1872 | } | |
92970b93 | 1873 | if (localizing) { |
bfcb3514 | 1874 | if (HvNAME_get(hv) && isGV(*svp)) |
159b6efe | 1875 | save_gp(MUTABLE_GV(*svp), !(PL_op->op_flags & OPf_SPECIAL)); |
47cfc530 VP |
1876 | else if (preeminent) |
1877 | save_helem_flags(hv, keysv, svp, | |
1878 | (PL_op->op_flags & OPf_SPECIAL) ? 0 : SAVEf_SETMAGIC); | |
1879 | else | |
1880 | SAVEHDELETE(hv, keysv); | |
5f05dabc | 1881 | } |
533c011a NIS |
1882 | else if (PL_op->op_private & OPpDEREF) |
1883 | vivify_ref(*svp, PL_op->op_private & OPpDEREF); | |
a0d0e21e | 1884 | } |
3280af22 | 1885 | sv = (svp ? *svp : &PL_sv_undef); |
fd69380d DM |
1886 | /* Originally this did a conditional C<sv = sv_mortalcopy(sv)>; this |
1887 | * was to make C<local $tied{foo} = $tied{foo}> possible. | |
1888 | * However, it seems no longer to be needed for that purpose, and | |
1889 | * introduced a new bug: stuff like C<while ($hash{taintedval} =~ /.../g> | |
1890 | * would loop endlessly since the pos magic is getting set on the | |
1891 | * mortal copy and lost. However, the copy has the effect of | |
1892 | * triggering the get magic, and losing it altogether made things like | |
1893 | * c<$tied{foo};> in void context no longer do get magic, which some | |
1894 | * code relied on. Also, delayed triggering of magic on @+ and friends | |
1895 | * meant the original regex may be out of scope by now. So as a | |
1896 | * compromise, do the get magic here. (The MGf_GSKIP flag will stop it | |
1897 | * being called too many times). */ | |
39cf747a | 1898 | if (!lval && SvRMAGICAL(hv) && SvGMAGICAL(sv)) |
fd69380d | 1899 | mg_get(sv); |
be6c24e0 | 1900 | PUSHs(sv); |
a0d0e21e LW |
1901 | RETURN; |
1902 | } | |
1903 | ||
1904 | PP(pp_leave) | |
1905 | { | |
27da23d5 | 1906 | dVAR; dSP; |
c09156bb | 1907 | register PERL_CONTEXT *cx; |
a0d0e21e LW |
1908 | SV **newsp; |
1909 | PMOP *newpm; | |
1910 | I32 gimme; | |
1911 | ||
533c011a | 1912 | if (PL_op->op_flags & OPf_SPECIAL) { |
a0d0e21e | 1913 | cx = &cxstack[cxstack_ix]; |
3280af22 | 1914 | cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */ |
a0d0e21e LW |
1915 | } |
1916 | ||
1917 | POPBLOCK(cx,newpm); | |
1918 | ||
e91684bf | 1919 | gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR); |
a0d0e21e | 1920 | |
a1f49e72 | 1921 | TAINT_NOT; |
54310121 | 1922 | if (gimme == G_VOID) |
1923 | SP = newsp; | |
1924 | else if (gimme == G_SCALAR) { | |
a3b680e6 | 1925 | register SV **mark; |
54310121 | 1926 | MARK = newsp + 1; |
09256e2f | 1927 | if (MARK <= SP) { |
54310121 | 1928 | if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP)) |
1929 | *MARK = TOPs; | |
1930 | else | |
1931 | *MARK = sv_mortalcopy(TOPs); | |
09256e2f | 1932 | } else { |
54310121 | 1933 | MEXTEND(mark,0); |
3280af22 | 1934 | *MARK = &PL_sv_undef; |
a0d0e21e | 1935 | } |
54310121 | 1936 | SP = MARK; |
a0d0e21e | 1937 | } |
54310121 | 1938 | else if (gimme == G_ARRAY) { |
a1f49e72 | 1939 | /* in case LEAVE wipes old return values */ |
a3b680e6 | 1940 | register SV **mark; |
a1f49e72 CS |
1941 | for (mark = newsp + 1; mark <= SP; mark++) { |
1942 | if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) { | |
a0d0e21e | 1943 | *mark = sv_mortalcopy(*mark); |
a1f49e72 CS |
1944 | TAINT_NOT; /* Each item is independent */ |
1945 | } | |
1946 | } | |
a0d0e21e | 1947 | } |
3280af22 | 1948 | PL_curpm = newpm; /* Don't pop $1 et al till now */ |
a0d0e21e | 1949 | |
d343c3ef | 1950 | LEAVE_with_name("block"); |
a0d0e21e LW |
1951 | |
1952 | RETURN; | |
1953 | } | |
1954 | ||
1955 | PP(pp_iter) | |
1956 | { | |
97aff369 | 1957 | dVAR; dSP; |
c09156bb | 1958 | register PERL_CONTEXT *cx; |
dc09a129 | 1959 | SV *sv, *oldsv; |
1d7c1841 | 1960 | SV **itersvp; |
d01136d6 BS |
1961 | AV *av = NULL; /* used for LOOP_FOR on arrays and the stack */ |
1962 | bool av_is_stack = FALSE; | |
a0d0e21e | 1963 | |
924508f0 | 1964 | EXTEND(SP, 1); |
a0d0e21e | 1965 | cx = &cxstack[cxstack_ix]; |
3b719c58 | 1966 | if (!CxTYPE_is_LOOP(cx)) |
cea2e8a9 | 1967 | DIE(aTHX_ "panic: pp_iter"); |
a0d0e21e | 1968 | |
1d7c1841 | 1969 | itersvp = CxITERVAR(cx); |
d01136d6 | 1970 | if (CxTYPE(cx) == CXt_LOOP_LAZYSV) { |
89ea2908 | 1971 | /* string increment */ |
d01136d6 BS |
1972 | SV* cur = cx->blk_loop.state_u.lazysv.cur; |
1973 | SV *end = cx->blk_loop.state_u.lazysv.end; | |
267cc4a8 NC |
1974 | /* If the maximum is !SvOK(), pp_enteriter substitutes PL_sv_no. |
1975 | It has SvPVX of "" and SvCUR of 0, which is what we want. */ | |
4fe3f0fa | 1976 | STRLEN maxlen = 0; |
d01136d6 | 1977 | const char *max = SvPV_const(end, maxlen); |
89ea2908 | 1978 | if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) { |
1d7c1841 | 1979 | if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) { |
eaa5c2d6 | 1980 | /* safe to reuse old SV */ |
1d7c1841 | 1981 | sv_setsv(*itersvp, cur); |
eaa5c2d6 | 1982 | } |
1c846c1f | 1983 | else |
eaa5c2d6 GA |
1984 | { |
1985 | /* we need a fresh SV every time so that loop body sees a | |
1986 | * completely new SV for closures/references to work as | |
1987 | * they used to */ | |
dc09a129 | 1988 | oldsv = *itersvp; |
1d7c1841 | 1989 | *itersvp = newSVsv(cur); |
dc09a129 | 1990 | SvREFCNT_dec(oldsv); |
eaa5c2d6 | 1991 | } |
aa07b2f6 | 1992 | if (strEQ(SvPVX_const(cur), max)) |
89ea2908 GA |
1993 | sv_setiv(cur, 0); /* terminate next time */ |
1994 | else | |
1995 | sv_inc(cur); | |
1996 | RETPUSHYES; | |
1997 | } | |
1998 | RETPUSHNO; | |
d01136d6 BS |
1999 | } |
2000 | else if (CxTYPE(cx) == CXt_LOOP_LAZYIV) { | |
89ea2908 | 2001 | /* integer increment */ |
d01136d6 | 2002 | if (cx->blk_loop.state_u.lazyiv.cur > cx->blk_loop.state_u.lazyiv.end) |
89ea2908 | 2003 | RETPUSHNO; |
7f61b687 | 2004 | |
3db8f154 | 2005 | /* don't risk potential race */ |
1d7c1841 | 2006 | if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) { |
eaa5c2d6 | 2007 | /* safe to reuse old SV */ |
d01136d6 | 2008 | sv_setiv(*itersvp, cx->blk_loop.state_u.lazyiv.cur++); |
eaa5c2d6 | 2009 | } |
1c846c1f | 2010 | else |
eaa5c2d6 GA |
2011 | { |
2012 | /* we need a fresh SV every time so that loop body sees a | |
2013 | * completely new SV for closures/references to work as they | |
2014 | * used to */ | |
dc09a129 | 2015 | oldsv = *itersvp; |
d01136d6 | 2016 | *itersvp = newSViv(cx->blk_loop.state_u.lazyiv.cur++); |
dc09a129 | 2017 | SvREFCNT_dec(oldsv); |
eaa5c2d6 | 2018 | } |
a2309040 JH |
2019 | |
2020 | /* Handle end of range at IV_MAX */ | |
d01136d6 BS |
2021 | if ((cx->blk_loop.state_u.lazyiv.cur == IV_MIN) && |
2022 | (cx->blk_loop.state_u.lazyiv.end == IV_MAX)) | |
a2309040 | 2023 | { |
d01136d6 BS |
2024 | cx->blk_loop.state_u.lazyiv.cur++; |
2025 | cx->blk_loop.state_u.lazyiv.end++; | |
a2309040 JH |
2026 | } |
2027 | ||
89ea2908 GA |
2028 | RETPUSHYES; |
2029 | } | |
2030 | ||
2031 | /* iterate array */ | |
d01136d6 BS |
2032 | assert(CxTYPE(cx) == CXt_LOOP_FOR); |
2033 | av = cx->blk_loop.state_u.ary.ary; | |
2034 | if (!av) { | |
2035 | av_is_stack = TRUE; | |
2036 | av = PL_curstack; | |
2037 | } | |
ef3e5ea9 | 2038 | if (PL_op->op_private & OPpITER_REVERSED) { |
d01136d6 BS |
2039 | if (cx->blk_loop.state_u.ary.ix <= (av_is_stack |
2040 | ? cx->blk_loop.resetsp + 1 : 0)) | |
ef3e5ea9 | 2041 | RETPUSHNO; |
a0d0e21e | 2042 | |
ef3e5ea9 | 2043 | if (SvMAGICAL(av) || AvREIFY(av)) { |
d01136d6 | 2044 | SV * const * const svp = av_fetch(av, --cx->blk_loop.state_u.ary.ix, FALSE); |
a0714e2c | 2045 | sv = svp ? *svp : NULL; |
ef3e5ea9 NC |
2046 | } |
2047 | else { | |
d01136d6 | 2048 | sv = AvARRAY(av)[--cx->blk_loop.state_u.ary.ix]; |
ef3e5ea9 | 2049 | } |
d42935ef JH |
2050 | } |
2051 | else { | |
d01136d6 | 2052 | if (cx->blk_loop.state_u.ary.ix >= (av_is_stack ? cx->blk_oldsp : |
ef3e5ea9 NC |
2053 | AvFILL(av))) |
2054 | RETPUSHNO; | |
2055 | ||
2056 | if (SvMAGICAL(av) || AvREIFY(av)) { | |
d01136d6 | 2057 | SV * const * const svp = av_fetch(av, ++cx->blk_loop.state_u.ary.ix, FALSE); |
a0714e2c | 2058 | sv = svp ? *svp : NULL; |
ef3e5ea9 NC |
2059 | } |
2060 | else { | |
d01136d6 | 2061 | sv = AvARRAY(av)[++cx->blk_loop.state_u.ary.ix]; |
ef3e5ea9 | 2062 | } |
d42935ef | 2063 | } |
ef3e5ea9 | 2064 | |
0565a181 | 2065 | if (sv && SvIS_FREED(sv)) { |
a0714e2c | 2066 | *itersvp = NULL; |
b6c83531 | 2067 | Perl_croak(aTHX_ "Use of freed value in iteration"); |
cccede53 DM |
2068 | } |
2069 | ||
d01136d6 | 2070 | if (sv) { |
a0d0e21e | 2071 | SvTEMP_off(sv); |
d01136d6 BS |
2072 | SvREFCNT_inc_simple_void_NN(sv); |
2073 | } | |
a0d0e21e | 2074 | else |
3280af22 | 2075 | sv = &PL_sv_undef; |
d01136d6 BS |
2076 | if (!av_is_stack && sv == &PL_sv_undef) { |
2077 | SV *lv = newSV_type(SVt_PVLV); | |
2078 | LvTYPE(lv) = 'y'; | |
2079 | sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0); | |
b37c2d43 | 2080 | LvTARG(lv) = SvREFCNT_inc_simple(av); |
d01136d6 | 2081 | LvTARGOFF(lv) = cx->blk_loop.state_u.ary.ix; |
42718184 | 2082 | LvTARGLEN(lv) = (STRLEN)UV_MAX; |
d01136d6 | 2083 | sv = lv; |
5f05dabc | 2084 | } |
a0d0e21e | 2085 | |
dc09a129 | 2086 | oldsv = *itersvp; |
d01136d6 | 2087 | *itersvp = sv; |
dc09a129 DM |
2088 | SvREFCNT_dec(oldsv); |
2089 | ||
a0d0e21e LW |
2090 | RETPUSHYES; |
2091 | } | |
2092 | ||
ef07e810 DM |
2093 | /* |
2094 | A description of how taint works in pattern matching and substitution. | |
2095 | ||
0ab462a6 DM |
2096 | While the pattern is being assembled/concatenated and them compiled, |
2097 | PL_tainted will get set if any component of the pattern is tainted, e.g. | |
2098 | /.*$tainted/. At the end of pattern compilation, the RXf_TAINTED flag | |
2099 | is set on the pattern if PL_tainted is set. | |
ef07e810 | 2100 | |
0ab462a6 DM |
2101 | When the pattern is copied, e.g. $r = qr/..../, the SV holding the ref to |
2102 | the pattern is marked as tainted. This means that subsequent usage, such | |
2103 | as /x$r/, will set PL_tainted, and thus RXf_TAINTED, on the new pattern too. | |
ef07e810 DM |
2104 | |
2105 | During execution of a pattern, locale-variant ops such as ALNUML set the | |
2106 | local flag RF_tainted. At the end of execution, the engine sets the | |
0ab462a6 DM |
2107 | RXf_TAINTED_SEEN on the pattern if RF_tainted got set, or clears it |
2108 | otherwise. | |
ef07e810 DM |
2109 | |
2110 | In addition, RXf_TAINTED_SEEN is used post-execution by the get magic code | |
2111 | of $1 et al to indicate whether the returned value should be tainted. | |
2112 | It is the responsibility of the caller of the pattern (i.e. pp_match, | |
2113 | pp_subst etc) to set this flag for any other circumstances where $1 needs | |
2114 | to be tainted. | |
2115 | ||
2116 | The taint behaviour of pp_subst (and pp_substcont) is quite complex. | |
2117 | ||
2118 | There are three possible sources of taint | |
2119 | * the source string | |
2120 | * the pattern (both compile- and run-time, RXf_TAINTED / RXf_TAINTED_SEEN) | |
2121 | * the replacement string (or expression under /e) | |
2122 | ||
2123 | There are four destinations of taint and they are affected by the sources | |
2124 | according to the rules below: | |
2125 | ||
2126 | * the return value (not including /r): | |
2127 | tainted by the source string and pattern, but only for the | |
2128 | number-of-iterations case; boolean returns aren't tainted; | |
2129 | * the modified string (or modified copy under /r): | |
2130 | tainted by the source string, pattern, and replacement strings; | |
2131 | * $1 et al: | |
2132 | tainted by the pattern, and under 'use re "taint"', by the source | |
2133 | string too; | |
2134 | * PL_taint - i.e. whether subsequent code (e.g. in a /e block) is tainted: | |
2135 | should always be unset before executing subsequent code. | |
2136 | ||
2137 | The overall action of pp_subst is: | |
2138 | ||
2139 | * at the start, set bits in rxtainted indicating the taint status of | |
2140 | the various sources. | |
2141 | ||
2142 | * After each pattern execution, update the SUBST_TAINT_PAT bit in | |
2143 | rxtainted if RXf_TAINTED_SEEN has been set, to indicate that the | |
2144 | pattern has subsequently become tainted via locale ops. | |
2145 | ||
2146 | * If control is being passed to pp_substcont to execute a /e block, | |
2147 | save rxtainted in the CXt_SUBST block, for future use by | |
2148 | pp_substcont. | |
2149 | ||
2150 | * Whenever control is being returned to perl code (either by falling | |
2151 | off the "end" of pp_subst/pp_substcont, or by entering a /e block), | |
2152 | use the flag bits in rxtainted to make all the appropriate types of | |
0ab462a6 DM |
2153 | destination taint visible; e.g. set RXf_TAINTED_SEEN so that $1 |
2154 | et al will appear tainted. | |
ef07e810 DM |
2155 | |
2156 | pp_match is just a simpler version of the above. | |
2157 | ||
2158 | */ | |
2159 | ||
a0d0e21e LW |
2160 | PP(pp_subst) |
2161 | { | |
97aff369 | 2162 | dVAR; dSP; dTARG; |
a0d0e21e LW |
2163 | register PMOP *pm = cPMOP; |
2164 | PMOP *rpm = pm; | |
a0d0e21e LW |
2165 | register char *s; |
2166 | char *strend; | |
2167 | register char *m; | |
5c144d81 | 2168 | const char *c; |
a0d0e21e LW |
2169 | register char *d; |
2170 | STRLEN clen; | |
2171 | I32 iters = 0; | |
2172 | I32 maxiters; | |
2173 | register I32 i; | |
2174 | bool once; | |
ef07e810 DM |
2175 | U8 rxtainted = 0; /* holds various SUBST_TAINT_* flag bits. |
2176 | See "how taint works" above */ | |
a0d0e21e | 2177 | char *orig; |
1ed74d04 | 2178 | U8 r_flags; |
aaa362c4 | 2179 | register REGEXP *rx = PM_GETRE(pm); |
a0d0e21e LW |
2180 | STRLEN len; |
2181 | int force_on_match = 0; | |
0bcc34c2 | 2182 | const I32 oldsave = PL_savestack_ix; |
792b2c16 | 2183 | STRLEN slen; |
f272994b | 2184 | bool doutf8 = FALSE; |
f8c7b90f | 2185 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2186 | bool is_cow; |
2187 | #endif | |
a0714e2c | 2188 | SV *nsv = NULL; |
b770e143 NC |
2189 | /* known replacement string? */ |
2190 | register SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL; | |
a0d0e21e | 2191 | |
f410a211 NC |
2192 | PERL_ASYNC_CHECK(); |
2193 | ||
533c011a | 2194 | if (PL_op->op_flags & OPf_STACKED) |
a0d0e21e | 2195 | TARG = POPs; |
59f00321 RGS |
2196 | else if (PL_op->op_private & OPpTARGET_MY) |
2197 | GETTARGET; | |
a0d0e21e | 2198 | else { |
54b9620d | 2199 | TARG = DEFSV; |
a0d0e21e | 2200 | EXTEND(SP,1); |
1c846c1f | 2201 | } |
d9f424b2 | 2202 | |
4f4d7508 DC |
2203 | /* In non-destructive replacement mode, duplicate target scalar so it |
2204 | * remains unchanged. */ | |
2205 | if (rpm->op_pmflags & PMf_NONDESTRUCT) | |
4eedab49 | 2206 | TARG = sv_2mortal(newSVsv(TARG)); |
4f4d7508 | 2207 | |
f8c7b90f | 2208 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2209 | /* Awooga. Awooga. "bool" types that are actually char are dangerous, |
2210 | because they make integers such as 256 "false". */ | |
2211 | is_cow = SvIsCOW(TARG) ? TRUE : FALSE; | |
2212 | #else | |
765f542d NC |
2213 | if (SvIsCOW(TARG)) |
2214 | sv_force_normal_flags(TARG,0); | |
ed252734 NC |
2215 | #endif |
2216 | if ( | |
f8c7b90f | 2217 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2218 | !is_cow && |
2219 | #endif | |
2220 | (SvREADONLY(TARG) | |
cecf5685 NC |
2221 | || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG)) |
2222 | || SvTYPE(TARG) > SVt_PVLV) | |
4ce457a6 | 2223 | && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))) |
6ad8f254 | 2224 | Perl_croak_no_modify(aTHX); |
8ec5e241 NIS |
2225 | PUTBACK; |
2226 | ||
3e462cdc | 2227 | setup_match: |
d5263905 | 2228 | s = SvPV_mutable(TARG, len); |
68dc0745 | 2229 | if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV) |
a0d0e21e | 2230 | force_on_match = 1; |
20be6587 DM |
2231 | |
2232 | /* only replace once? */ | |
2233 | once = !(rpm->op_pmflags & PMf_GLOBAL); | |
2234 | ||
ef07e810 | 2235 | /* See "how taint works" above */ |
20be6587 DM |
2236 | if (PL_tainting) { |
2237 | rxtainted = ( | |
2238 | (SvTAINTED(TARG) ? SUBST_TAINT_STR : 0) | |
2239 | | ((RX_EXTFLAGS(rx) & RXf_TAINTED) ? SUBST_TAINT_PAT : 0) | |
2240 | | ((pm->op_pmflags & PMf_RETAINT) ? SUBST_TAINT_RETAINT : 0) | |
2241 | | ((once && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
2242 | ? SUBST_TAINT_BOOLRET : 0)); | |
2243 | TAINT_NOT; | |
2244 | } | |
a12c0f56 | 2245 | |
a30b2f1f | 2246 | RX_MATCH_UTF8_set(rx, DO_UTF8(TARG)); |
d9f424b2 | 2247 | |
a0d0e21e LW |
2248 | force_it: |
2249 | if (!pm || !s) | |
2269b42e | 2250 | DIE(aTHX_ "panic: pp_subst"); |
a0d0e21e LW |
2251 | |
2252 | strend = s + len; | |
a30b2f1f | 2253 | slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len; |
792b2c16 JH |
2254 | maxiters = 2 * slen + 10; /* We can match twice at each |
2255 | position, once with zero-length, | |
2256 | second time with non-zero. */ | |
a0d0e21e | 2257 | |
220fc49f | 2258 | if (!RX_PRELEN(rx) && PL_curpm) { |
3280af22 | 2259 | pm = PL_curpm; |
aaa362c4 | 2260 | rx = PM_GETRE(pm); |
a0d0e21e | 2261 | } |
07bc277f NC |
2262 | r_flags = (RX_NPARENS(rx) || SvTEMP(TARG) || PL_sawampersand |
2263 | || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) ) | |
ed252734 | 2264 | ? REXEC_COPY_STR : 0; |
f722798b | 2265 | if (SvSCREAM(TARG)) |
22e551b9 | 2266 | r_flags |= REXEC_SCREAM; |
7fba1cd6 | 2267 | |
a0d0e21e | 2268 | orig = m = s; |
07bc277f | 2269 | if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT) { |
ee0b7718 | 2270 | PL_bostr = orig; |
f9f4320a | 2271 | s = CALLREG_INTUIT_START(rx, TARG, s, strend, r_flags, NULL); |
f722798b IZ |
2272 | |
2273 | if (!s) | |
df34c13a | 2274 | goto ret_no; |
f722798b | 2275 | /* How to do it in subst? */ |
07bc277f | 2276 | /* if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL) |
1c846c1f | 2277 | && !PL_sawampersand |
07bc277f NC |
2278 | && !(RX_EXTFLAGS(rx) & RXf_KEEPCOPY) |
2279 | && ((RX_EXTFLAGS(rx) & RXf_NOSCAN) | |
2280 | || !((RX_EXTFLAGS(rx) & RXf_INTUIT_TAIL) | |
f722798b IZ |
2281 | && (r_flags & REXEC_SCREAM)))) |
2282 | goto yup; | |
2283 | */ | |
a0d0e21e | 2284 | } |
71be2cbc | 2285 | |
8b64c330 DM |
2286 | if (!CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL, |
2287 | r_flags | REXEC_CHECKED)) | |
2288 | { | |
5e79dfb9 DM |
2289 | ret_no: |
2290 | SPAGAIN; | |
2291 | PUSHs(rpm->op_pmflags & PMf_NONDESTRUCT ? TARG : &PL_sv_no); | |
2292 | LEAVE_SCOPE(oldsave); | |
2293 | RETURN; | |
2294 | } | |
2295 | ||
71be2cbc | 2296 | /* known replacement string? */ |
f272994b | 2297 | if (dstr) { |
20be6587 DM |
2298 | if (SvTAINTED(dstr)) |
2299 | rxtainted |= SUBST_TAINT_REPL; | |
3e462cdc KW |
2300 | |
2301 | /* Upgrade the source if the replacement is utf8 but the source is not, | |
2302 | * but only if it matched; see | |
2303 | * http://www.nntp.perl.org/group/perl.perl5.porters/2010/04/msg158809.html | |
2304 | */ | |
5e79dfb9 | 2305 | if (DO_UTF8(dstr) && ! DO_UTF8(TARG)) { |
c95ca9b8 DM |
2306 | char * const orig_pvx = SvPVX(TARG); |
2307 | const STRLEN new_len = sv_utf8_upgrade_nomg(TARG); | |
3e462cdc KW |
2308 | |
2309 | /* If the lengths are the same, the pattern contains only | |
2310 | * invariants, can keep going; otherwise, various internal markers | |
2311 | * could be off, so redo */ | |
c95ca9b8 | 2312 | if (new_len != len || orig_pvx != SvPVX(TARG)) { |
3e462cdc KW |
2313 | goto setup_match; |
2314 | } | |
2315 | } | |
2316 | ||
8514a05a JH |
2317 | /* replacement needing upgrading? */ |
2318 | if (DO_UTF8(TARG) && !doutf8) { | |
db79b45b | 2319 | nsv = sv_newmortal(); |
4a176938 | 2320 | SvSetSV(nsv, dstr); |
8514a05a JH |
2321 | if (PL_encoding) |
2322 | sv_recode_to_utf8(nsv, PL_encoding); | |
2323 | else | |
2324 | sv_utf8_upgrade(nsv); | |
5c144d81 | 2325 | c = SvPV_const(nsv, clen); |
4a176938 JH |
2326 | doutf8 = TRUE; |
2327 | } | |
2328 | else { | |
5c144d81 | 2329 | c = SvPV_const(dstr, clen); |
4a176938 | 2330 | doutf8 = DO_UTF8(dstr); |
8514a05a | 2331 | } |
f272994b A |
2332 | } |
2333 | else { | |
6136c704 | 2334 | c = NULL; |
f272994b A |
2335 | doutf8 = FALSE; |
2336 | } | |
2337 | ||
71be2cbc | 2338 | /* can do inplace substitution? */ |
ed252734 | 2339 | if (c |
f8c7b90f | 2340 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2341 | && !is_cow |
2342 | #endif | |
07bc277f NC |
2343 | && (I32)clen <= RX_MINLENRET(rx) && (once || !(r_flags & REXEC_COPY_STR)) |
2344 | && !(RX_EXTFLAGS(rx) & RXf_LOOKBEHIND_SEEN) | |
8b030b38 DM |
2345 | && (!doutf8 || SvUTF8(TARG))) |
2346 | { | |
ec911639 | 2347 | |
f8c7b90f | 2348 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2349 | if (SvIsCOW(TARG)) { |
2350 | assert (!force_on_match); | |
2351 | goto have_a_cow; | |
2352 | } | |
2353 | #endif | |
71be2cbc | 2354 | if (force_on_match) { |
2355 | force_on_match = 0; | |
2356 | s = SvPV_force(TARG, len); | |
2357 | goto force_it; | |
2358 | } | |
71be2cbc | 2359 | d = s; |
3280af22 | 2360 | PL_curpm = pm; |
71be2cbc | 2361 | SvSCREAM_off(TARG); /* disable possible screamer */ |
2362 | if (once) { | |
20be6587 DM |
2363 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
2364 | rxtainted |= SUBST_TAINT_PAT; | |
07bc277f NC |
2365 | m = orig + RX_OFFS(rx)[0].start; |
2366 | d = orig + RX_OFFS(rx)[0].end; | |
71be2cbc | 2367 | s = orig; |
2368 | if (m - s > strend - d) { /* faster to shorten from end */ | |
2369 | if (clen) { | |
2370 | Copy(c, m, clen, char); | |
2371 | m += clen; | |
a0d0e21e | 2372 | } |
71be2cbc | 2373 | i = strend - d; |
2374 | if (i > 0) { | |
2375 | Move(d, m, i, char); | |
2376 | m += i; | |
a0d0e21e | 2377 | } |
71be2cbc | 2378 | *m = '\0'; |
2379 | SvCUR_set(TARG, m - s); | |
2380 | } | |
155aba94 | 2381 | else if ((i = m - s)) { /* faster from front */ |
71be2cbc | 2382 | d -= clen; |
2383 | m = d; | |
0d3c21b0 | 2384 | Move(s, d - i, i, char); |
71be2cbc | 2385 | sv_chop(TARG, d-i); |
71be2cbc | 2386 | if (clen) |
2387 | Copy(c, m, clen, char); | |
2388 | } | |
2389 | else if (clen) { | |
2390 | d -= clen; | |
2391 | sv_chop(TARG, d); | |
2392 | Copy(c, d, clen, char); | |
2393 | } | |
2394 | else { | |
2395 | sv_chop(TARG, d); | |
2396 | } | |
8ec5e241 | 2397 | SPAGAIN; |
af050d75 | 2398 | PUSHs(rpm->op_pmflags & PMf_NONDESTRUCT ? TARG : &PL_sv_yes); |
71be2cbc | 2399 | } |
2400 | else { | |
71be2cbc | 2401 | do { |
2402 | if (iters++ > maxiters) | |
cea2e8a9 | 2403 | DIE(aTHX_ "Substitution loop"); |
20be6587 DM |
2404 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
2405 | rxtainted |= SUBST_TAINT_PAT; | |
07bc277f | 2406 | m = RX_OFFS(rx)[0].start + orig; |
155aba94 | 2407 | if ((i = m - s)) { |
71be2cbc | 2408 | if (s != d) |
2409 | Move(s, d, i, char); | |
2410 | d += i; | |
a0d0e21e | 2411 | } |
71be2cbc | 2412 | if (clen) { |
2413 | Copy(c, d, clen, char); | |
2414 | d += clen; | |
2415 | } | |
07bc277f | 2416 | s = RX_OFFS(rx)[0].end + orig; |
f9f4320a | 2417 | } while (CALLREGEXEC(rx, s, strend, orig, s == m, |
f722798b IZ |
2418 | TARG, NULL, |
2419 | /* don't match same null twice */ | |
2420 | REXEC_NOT_FIRST|REXEC_IGNOREPOS)); | |
71be2cbc | 2421 | if (s != d) { |
2422 | i = strend - s; | |
aa07b2f6 | 2423 | SvCUR_set(TARG, d - SvPVX_const(TARG) + i); |
71be2cbc | 2424 | Move(s, d, i+1, char); /* include the NUL */ |
a0d0e21e | 2425 | } |
8ec5e241 | 2426 | SPAGAIN; |
4f4d7508 DC |
2427 | if (rpm->op_pmflags & PMf_NONDESTRUCT) |
2428 | PUSHs(TARG); | |
2429 | else | |
2430 | mPUSHi((I32)iters); | |
a0d0e21e LW |
2431 | } |
2432 | } | |
ff6e92e8 | 2433 | else { |
a0d0e21e LW |
2434 | if (force_on_match) { |
2435 | force_on_match = 0; | |
2436 | s = SvPV_force(TARG, len); | |
2437 | goto force_it; | |
2438 | } | |
f8c7b90f | 2439 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2440 | have_a_cow: |
2441 | #endif | |
20be6587 DM |
2442 | if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */ |
2443 | rxtainted |= SUBST_TAINT_PAT; | |
740cce10 | 2444 | dstr = newSVpvn_utf8(m, s-m, DO_UTF8(TARG)); |
cff085c1 | 2445 | SAVEFREESV(dstr); |
3280af22 | 2446 | PL_curpm = pm; |
a0d0e21e | 2447 | if (!c) { |
c09156bb | 2448 | register PERL_CONTEXT *cx; |
8ec5e241 | 2449 | SPAGAIN; |
20be6587 DM |
2450 | /* note that a whole bunch of local vars are saved here for |
2451 | * use by pp_substcont: here's a list of them in case you're | |
2452 | * searching for places in this sub that uses a particular var: | |
2453 | * iters maxiters r_flags oldsave rxtainted orig dstr targ | |
2454 | * s m strend rx once */ | |
a0d0e21e | 2455 | PUSHSUBST(cx); |
20e98b0f | 2456 | RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot); |
a0d0e21e | 2457 | } |
cf93c79d | 2458 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
a0d0e21e LW |
2459 | do { |
2460 | if (iters++ > maxiters) | |
cea2e8a9 | 2461 | DIE(aTHX_ "Substitution loop"); |
20be6587 DM |
2462 | if (RX_MATCH_TAINTED(rx)) |
2463 | rxtainted |= SUBST_TAINT_PAT; | |
07bc277f | 2464 | if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) { |
a0d0e21e LW |
2465 | m = s; |
2466 | s = orig; | |
07bc277f | 2467 | orig = RX_SUBBEG(rx); |
a0d0e21e LW |
2468 | s = orig + (m - s); |
2469 | strend = s + (strend - m); | |
2470 | } | |
07bc277f | 2471 | m = RX_OFFS(rx)[0].start + orig; |
db79b45b JH |
2472 | if (doutf8 && !SvUTF8(dstr)) |
2473 | sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv); | |
2474 | else | |
2475 | sv_catpvn(dstr, s, m-s); | |
07bc277f | 2476 | s = RX_OFFS(rx)[0].end + orig; |
a0d0e21e LW |
2477 | if (clen) |
2478 | sv_catpvn(dstr, c, clen); | |
2479 | if (once) | |
2480 | break; | |
f9f4320a | 2481 | } while (CALLREGEXEC(rx, s, strend, orig, s == m, |
ffc61ed2 | 2482 | TARG, NULL, r_flags)); |
db79b45b JH |
2483 | if (doutf8 && !DO_UTF8(TARG)) |
2484 | sv_catpvn_utf8_upgrade(dstr, s, strend - s, nsv); | |
89afcb60 A |
2485 | else |
2486 | sv_catpvn(dstr, s, strend - s); | |
748a9306 | 2487 | |
f8c7b90f | 2488 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2489 | /* The match may make the string COW. If so, brilliant, because that's |
2490 | just saved us one malloc, copy and free - the regexp has donated | |
2491 | the old buffer, and we malloc an entirely new one, rather than the | |
2492 | regexp malloc()ing a buffer and copying our original, only for | |
2493 | us to throw it away here during the substitution. */ | |
2494 | if (SvIsCOW(TARG)) { | |
2495 | sv_force_normal_flags(TARG, SV_COW_DROP_PV); | |
2496 | } else | |
2497 | #endif | |
2498 | { | |
8bd4d4c5 | 2499 | SvPV_free(TARG); |
ed252734 | 2500 | } |
f880fe2f | 2501 | SvPV_set(TARG, SvPVX(dstr)); |
748a9306 LW |
2502 | SvCUR_set(TARG, SvCUR(dstr)); |
2503 | SvLEN_set(TARG, SvLEN(dstr)); | |
f272994b | 2504 | doutf8 |= DO_UTF8(dstr); |
6136c704 | 2505 | SvPV_set(dstr, NULL); |
748a9306 | 2506 | |
f878fbec | 2507 | SPAGAIN; |
4f4d7508 DC |
2508 | if (rpm->op_pmflags & PMf_NONDESTRUCT) |
2509 | PUSHs(TARG); | |
2510 | else | |
2511 | mPUSHi((I32)iters); | |
a0d0e21e | 2512 | } |
f1a76097 DM |
2513 | (void)SvPOK_only_UTF8(TARG); |
2514 | if (doutf8) | |
2515 | SvUTF8_on(TARG); | |
20be6587 | 2516 | |
ef07e810 | 2517 | /* See "how taint works" above */ |
20be6587 DM |
2518 | if (PL_tainting) { |
2519 | if ((rxtainted & SUBST_TAINT_PAT) || | |
2520 | ((rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) == | |
2521 | (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) | |
2522 | ) | |
2523 | (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */ | |
2524 | ||
2525 | if (!(rxtainted & SUBST_TAINT_BOOLRET) | |
2526 | && (rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT)) | |
2527 | ) | |
2528 | SvTAINTED_on(TOPs); /* taint return value */ | |
2529 | else | |
2530 | SvTAINTED_off(TOPs); /* may have got tainted earlier */ | |
2531 | ||
2532 | /* needed for mg_set below */ | |
2533 | PL_tainted = | |
2534 | cBOOL(rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)); | |
2535 | SvTAINT(TARG); | |
2536 | } | |
2537 | SvSETMAGIC(TARG); /* PL_tainted must be correctly set for this mg_set */ | |
2538 | TAINT_NOT; | |
f1a76097 DM |
2539 | LEAVE_SCOPE(oldsave); |
2540 | RETURN; | |
a0d0e21e LW |
2541 | } |
2542 | ||
2543 | PP(pp_grepwhile) | |
2544 | { | |
27da23d5 | 2545 | dVAR; dSP; |
a0d0e21e LW |
2546 | |
2547 | if (SvTRUEx(POPs)) | |
3280af22 NIS |
2548 | PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr]; |
2549 | ++*PL_markstack_ptr; | |
b2a2a901 | 2550 | FREETMPS; |
d343c3ef | 2551 | LEAVE_with_name("grep_item"); /* exit inner scope */ |
a0d0e21e LW |
2552 | |
2553 | /* All done yet? */ | |
3280af22 | 2554 | if (PL_stack_base + *PL_markstack_ptr > SP) { |
a0d0e21e | 2555 | I32 items; |
c4420975 | 2556 | const I32 gimme = GIMME_V; |
a0d0e21e | 2557 | |
d343c3ef | 2558 | LEAVE_with_name("grep"); /* exit outer scope */ |
a0d0e21e | 2559 | (void)POPMARK; /* pop src */ |
3280af22 | 2560 | items = --*PL_markstack_ptr - PL_markstack_ptr[-1]; |
a0d0e21e | 2561 | (void)POPMARK; /* pop dst */ |
3280af22 | 2562 | SP = PL_stack_base + POPMARK; /* pop original mark */ |
54310121 | 2563 | if (gimme == G_SCALAR) { |
7cc47870 | 2564 | if (PL_op->op_private & OPpGREP_LEX) { |
c4420975 | 2565 | SV* const sv = sv_newmortal(); |
7cc47870 RGS |
2566 | sv_setiv(sv, items); |
2567 | PUSHs(sv); | |
2568 | } | |
2569 | else { | |
2570 | dTARGET; | |
2571 | XPUSHi(items); | |
2572 | } | |
a0d0e21e | 2573 | } |
54310121 | 2574 | else if (gimme == G_ARRAY) |
2575 | SP += items; | |
a0d0e21e LW |
2576 | RETURN; |
2577 | } | |
2578 | else { | |
2579 | SV *src; | |
2580 | ||
d343c3ef | 2581 | ENTER_with_name("grep_item"); /* enter inner scope */ |
1d7c1841 | 2582 | SAVEVPTR(PL_curpm); |
a0d0e21e | 2583 | |
3280af22 | 2584 | src = PL_stack_base[*PL_markstack_ptr]; |
a0d0e21e | 2585 | SvTEMP_off(src); |
59f00321 RGS |
2586 | if (PL_op->op_private & OPpGREP_LEX) |
2587 | PAD_SVl(PL_op->op_targ) = src; | |
2588 | else | |
414bf5ae | 2589 | DEFSV_set(src); |
a0d0e21e LW |
2590 | |
2591 | RETURNOP(cLOGOP->op_other); | |
2592 | } | |
2593 | } | |
2594 | ||
2595 | PP(pp_leavesub) | |
2596 | { | |
27da23d5 | 2597 | dVAR; dSP; |
a0d0e21e LW |
2598 | SV **mark; |
2599 | SV **newsp; | |
2600 | PMOP *newpm; | |
2601 | I32 gimme; | |
c09156bb | 2602 | register PERL_CONTEXT *cx; |
b0d9ce38 | 2603 | SV *sv; |
767eda44 | 2604 | bool gmagic; |
a0d0e21e | 2605 | |
9850bf21 RH |
2606 | if (CxMULTICALL(&cxstack[cxstack_ix])) |
2607 | return 0; | |
2608 | ||
a0d0e21e | 2609 | POPBLOCK(cx,newpm); |
5dd42e15 | 2610 | cxstack_ix++; /* temporarily protect top context */ |
767eda44 | 2611 | gmagic = CxLVAL(cx) & OPpENTERSUB_DEREF; |
1c846c1f | 2612 | |
a1f49e72 | 2613 | TAINT_NOT; |
a0d0e21e LW |
2614 | if (gimme == G_SCALAR) { |
2615 | MARK = newsp + 1; | |
a29cdaf0 | 2616 | if (MARK <= SP) { |
a8bba7fa | 2617 | if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) { |
a29cdaf0 IZ |
2618 | if (SvTEMP(TOPs)) { |
2619 | *MARK = SvREFCNT_inc(TOPs); | |
2620 | FREETMPS; | |
2621 | sv_2mortal(*MARK); | |
767eda44 | 2622 | if (gmagic) SvGETMAGIC(*MARK); |
cd06dffe GS |
2623 | } |
2624 | else { | |
959e3673 | 2625 | sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */ |
a29cdaf0 | 2626 | FREETMPS; |
959e3673 GS |
2627 | *MARK = sv_mortalcopy(sv); |
2628 | SvREFCNT_dec(sv); | |
a29cdaf0 | 2629 | } |
cd06dffe | 2630 | } |
767eda44 FC |
2631 | else if (SvTEMP(TOPs)) { |
2632 | *MARK = TOPs; | |
2633 | if (gmagic) SvGETMAGIC(TOPs); | |
2634 | } | |
cd06dffe | 2635 | else |
767eda44 | 2636 | *MARK = sv_mortalcopy(TOPs); |
cd06dffe GS |
2637 | } |
2638 | else { | |
f86702cc | 2639 | MEXTEND(MARK, 0); |
3280af22 | 2640 | *MARK = &PL_sv_undef; |
a0d0e21e LW |
2641 | } |
2642 | SP = MARK; | |
2643 | } | |
54310121 | 2644 | else if (gimme == G_ARRAY) { |
f86702cc | 2645 | for (MARK = newsp + 1; MARK <= SP; MARK++) { |
a1f49e72 | 2646 | if (!SvTEMP(*MARK)) { |
f86702cc | 2647 | *MARK = sv_mortalcopy(*MARK); |
a1f49e72 CS |
2648 | TAINT_NOT; /* Each item is independent */ |
2649 | } | |
f86702cc | 2650 | } |
a0d0e21e | 2651 | } |
f86702cc | 2652 | PUTBACK; |
1c846c1f | 2653 | |
a57c6685 | 2654 | LEAVE; |
5dd42e15 | 2655 | cxstack_ix--; |
b0d9ce38 | 2656 | POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */ |
3280af22 | 2657 | PL_curpm = newpm; /* ... and pop $1 et al */ |
a0d0e21e | 2658 | |
b0d9ce38 | 2659 | LEAVESUB(sv); |
f39bc417 | 2660 | return cx->blk_sub.retop; |
a0d0e21e LW |
2661 | } |
2662 | ||
cd06dffe GS |
2663 | /* This duplicates the above code because the above code must not |
2664 | * get any slower by more conditions */ | |
2665 | PP(pp_leavesublv) | |
2666 | { | |
27da23d5 | 2667 | dVAR; dSP; |
cd06dffe GS |
2668 | SV **mark; |
2669 | SV **newsp; | |
2670 | PMOP *newpm; | |
2671 | I32 gimme; | |
2672 | register PERL_CONTEXT *cx; | |
b0d9ce38 | 2673 | SV *sv; |
cd06dffe | 2674 | |
9850bf21 RH |
2675 | if (CxMULTICALL(&cxstack[cxstack_ix])) |
2676 | return 0; | |
2677 | ||
cd06dffe | 2678 | POPBLOCK(cx,newpm); |
5dd42e15 | 2679 | cxstack_ix++; /* temporarily protect top context */ |
1c846c1f | 2680 | |
cd06dffe GS |
2681 | TAINT_NOT; |
2682 | ||
bafb2adc | 2683 | if (CxLVAL(cx) & OPpENTERSUB_INARGS) { |
cd06dffe GS |
2684 | /* We are an argument to a function or grep(). |
2685 | * This kind of lvalueness was legal before lvalue | |
2686 | * subroutines too, so be backward compatible: | |
2687 | * cannot report errors. */ | |
2688 | ||
bf8fb5eb | 2689 | /* Scalar context *is* possible, on the LHS of ->. */ |
cd06dffe | 2690 | if (gimme == G_SCALAR) |
bf8fb5eb | 2691 | goto rvalue; |
cd06dffe | 2692 | if (gimme == G_ARRAY) { |
91e34d82 | 2693 | mark = newsp + 1; |
a8bba7fa | 2694 | if (!CvLVALUE(cx->blk_sub.cv)) |
bf8fb5eb | 2695 | goto rvalue_array; |
cd06dffe GS |
2696 | EXTEND_MORTAL(SP - newsp); |
2697 | for (mark = newsp + 1; mark <= SP; mark++) { | |
2698 | if (SvTEMP(*mark)) | |
6f207bd3 | 2699 | NOOP; |
a1302723 FC |
2700 | else if (SvFLAGS(*mark) & SVs_PADTMP |
2701 | || (SvFLAGS(*mark) & (SVf_READONLY|SVf_FAKE)) | |
2702 | == SVf_READONLY) | |
cd06dffe GS |
2703 | *mark = sv_mortalcopy(*mark); |
2704 | else { | |
2705 | /* Can be a localized value subject to deletion. */ | |
2706 | PL_tmps_stack[++PL_tmps_ix] = *mark; | |
b37c2d43 | 2707 | SvREFCNT_inc_void(*mark); |
cd06dffe GS |
2708 | } |
2709 | } | |
2710 | } | |
2711 | } | |
bafb2adc | 2712 | else if (CxLVAL(cx)) { /* Leave it as it is if we can. */ |
cd06dffe GS |
2713 | /* Here we go for robustness, not for speed, so we change all |
2714 | * the refcounts so the caller gets a live guy. Cannot set | |
2715 | * TEMP, so sv_2mortal is out of question. */ | |
a8bba7fa | 2716 | if (!CvLVALUE(cx->blk_sub.cv)) { |
a57c6685 | 2717 | LEAVE; |
5dd42e15 | 2718 | cxstack_ix--; |
b0d9ce38 | 2719 | POPSUB(cx,sv); |
d470f89e | 2720 | PL_curpm = newpm; |
b0d9ce38 | 2721 | LEAVESUB(sv); |
d470f89e GS |
2722 | DIE(aTHX_ "Can't modify non-lvalue subroutine call"); |
2723 | } | |
cd06dffe GS |
2724 | if (gimme == G_SCALAR) { |
2725 | MARK = newsp + 1; | |
2726 | EXTEND_MORTAL(1); | |
2727 | if (MARK == SP) { | |
fd6c41ce | 2728 | if ((SvPADTMP(TOPs) || |
c73030b8 FC |
2729 | (SvFLAGS(TOPs) & (SVf_READONLY | SVf_FAKE)) |
2730 | == SVf_READONLY | |
2731 | ) && | |
2732 | !SvSMAGICAL(TOPs)) { | |
2733 | LEAVE; | |
2734 | cxstack_ix--; | |
2735 | POPSUB(cx,sv); | |
2736 | PL_curpm = newpm; | |
2737 | LEAVESUB(sv); | |
2738 | DIE(aTHX_ "Can't return %s from lvalue subroutine", | |
2739 | SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef" | |
2740 | : "a readonly value" : "a temporary"); | |
2741 | } | |
2742 | else { /* Can be a localized value | |
2743 | * subject to deletion. */ | |
cd06dffe | 2744 | PL_tmps_stack[++PL_tmps_ix] = *mark; |
b37c2d43 | 2745 | SvREFCNT_inc_void(*mark); |
c73030b8 | 2746 | } |
cd06dffe | 2747 | } |
69b22cd1 FC |
2748 | else { |
2749 | /* sub:lvalue{} will take us here. | |
2750 | Presumably the case of a non-empty array never happens. | |
2751 | */ | |
a57c6685 | 2752 | LEAVE; |
5dd42e15 | 2753 | cxstack_ix--; |
b0d9ce38 | 2754 | POPSUB(cx,sv); |
d470f89e | 2755 | PL_curpm = newpm; |
b0d9ce38 | 2756 | LEAVESUB(sv); |
69b22cd1 FC |
2757 | DIE(aTHX_ "%s", |
2758 | (MARK > SP | |
2759 | ? "Can't return undef from lvalue subroutine" | |
2760 | : "Array returned from lvalue subroutine in scalar " | |
2761 | "context" | |
2762 | ) | |
2763 | ); | |
d470f89e | 2764 | } |
cd06dffe GS |
2765 | SP = MARK; |
2766 | } | |
2767 | else if (gimme == G_ARRAY) { | |
2768 | EXTEND_MORTAL(SP - newsp); | |
2769 | for (mark = newsp + 1; mark <= SP; mark++) { | |
f206cdda | 2770 | if (*mark != &PL_sv_undef |
fd6c41ce | 2771 | && (SvPADTMP(*mark) |
a0aa6076 FC |
2772 | || (SvFLAGS(*mark) & (SVf_READONLY|SVf_FAKE)) |
2773 | == SVf_READONLY | |
2774 | ) | |
2775 | ) { | |
d470f89e GS |
2776 | /* Might be flattened array after $#array = */ |
2777 | PUTBACK; | |
a57c6685 | 2778 | LEAVE; |
5dd42e15 | 2779 | cxstack_ix--; |
b0d9ce38 | 2780 | POPSUB(cx,sv); |
d470f89e | 2781 | PL_curpm = newpm; |
b0d9ce38 | 2782 | LEAVESUB(sv); |
f206cdda AMS |
2783 | DIE(aTHX_ "Can't return a %s from lvalue subroutine", |
2784 | SvREADONLY(TOPs) ? "readonly value" : "temporary"); | |
d470f89e | 2785 | } |
cd06dffe | 2786 | else { |
cd06dffe GS |
2787 | /* Can be a localized value subject to deletion. */ |
2788 | PL_tmps_stack[++PL_tmps_ix] = *mark; | |
b37c2d43 | 2789 | SvREFCNT_inc_void(*mark); |
cd06dffe GS |
2790 | } |
2791 | } | |
2792 | } | |
2793 | } | |
2794 | else { | |
2795 | if (gimme == G_SCALAR) { | |
bf8fb5eb | 2796 | rvalue: |
cd06dffe GS |
2797 | MARK = newsp + 1; |
2798 | if (MARK <= SP) { | |
a8bba7fa | 2799 | if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) { |
cd06dffe GS |
2800 | *MARK = SvREFCNT_inc(TOPs); |
2801 | FREETMPS; | |
2802 | sv_2mortal(*MARK); | |
cd06dffe GS |
2803 | } |
2804 | else | |
bf8fb5eb | 2805 | *MARK = TOPs; |
cd06dffe GS |
2806 | } |
2807 | else { | |
2808 | MEXTEND(MARK, 0); | |
2809 | *MARK = &PL_sv_undef; | |
2810 | } | |
2811 | SP = MARK; | |
2812 | } | |
cd06dffe | 2813 | } |
767eda44 FC |
2814 | |
2815 | if (CxLVAL(cx) & OPpENTERSUB_DEREF) { | |
2816 | assert(gimme == G_SCALAR); | |
2817 | SvGETMAGIC(TOPs); | |
2818 | if (!SvOK(TOPs)) { | |
2819 | U8 deref_type; | |
2820 | if (cx->blk_sub.retop->op_type == OP_RV2SV) | |
2821 | deref_type = OPpDEREF_SV; | |
2822 | else if (cx->blk_sub.retop->op_type == OP_RV2AV) | |
2823 | deref_type = OPpDEREF_AV; | |
2824 | else { | |
2825 | assert(cx->blk_sub.retop->op_type == OP_RV2HV); | |
2826 | deref_type = OPpDEREF_HV; | |
2827 | } | |
2828 | vivify_ref(TOPs, deref_type); | |
2829 | } | |
2830 | } | |
2831 | ||
bf8fb5eb | 2832 | rvalue_array: |
cd06dffe | 2833 | PUTBACK; |
1c846c1f | 2834 | |
a57c6685 | 2835 | LEAVE; |
5dd42e15 | 2836 | cxstack_ix--; |
b0d9ce38 | 2837 | POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */ |
cd06dffe GS |
2838 | PL_curpm = newpm; /* ... and pop $1 et al */ |
2839 | ||
b0d9ce38 | 2840 | LEAVESUB(sv); |
f39bc417 | 2841 | return cx->blk_sub.retop; |
cd06dffe GS |
2842 | } |
2843 | ||
a0d0e21e LW |
2844 | PP(pp_entersub) |
2845 | { | |
27da23d5 | 2846 | dVAR; dSP; dPOPss; |
a0d0e21e | 2847 | GV *gv; |
a0d0e21e | 2848 | register CV *cv; |
c09156bb | 2849 | register PERL_CONTEXT *cx; |
5d94fbed | 2850 | I32 gimme; |
a9c4fd4e | 2851 | const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0; |
a0d0e21e LW |
2852 | |
2853 | if (!sv) | |
cea2e8a9 | 2854 | DIE(aTHX_ "Not a CODE reference"); |
a0d0e21e | 2855 | switch (SvTYPE(sv)) { |
f1025168 NC |
2856 | /* This is overwhelming the most common case: */ |
2857 | case SVt_PVGV: | |
6e592b3a BM |
2858 | if (!isGV_with_GP(sv)) |
2859 | DIE(aTHX_ "Not a CODE reference"); | |
13be902c | 2860 | we_have_a_glob: |
159b6efe | 2861 | if (!(cv = GvCVu((const GV *)sv))) { |
f730a42d | 2862 | HV *stash; |
f2c0649b | 2863 | cv = sv_2cv(sv, &stash, &gv, 0); |
f730a42d | 2864 | } |
f1025168 | 2865 | if (!cv) { |
a57c6685 | 2866 | ENTER; |
f1025168 NC |
2867 | SAVETMPS; |
2868 | goto try_autoload; | |
2869 | } | |
2870 | break; | |
13be902c FC |
2871 | case SVt_PVLV: |
2872 | if(isGV_with_GP(sv)) goto we_have_a_glob; | |
2873 | /*FALLTHROUGH*/ | |
a0d0e21e | 2874 | default: |
7c75014e DM |
2875 | if (sv == &PL_sv_yes) { /* unfound import, ignore */ |
2876 | if (hasargs) | |
2877 | SP = PL_stack_base + POPMARK; | |
4d198de3 DM |
2878 | else |
2879 | (void)POPMARK; | |
7c75014e DM |
2880 | RETURN; |
2881 | } | |
2882 | SvGETMAGIC(sv); | |
2883 | if (SvROK(sv)) { | |
93d7320b DM |
2884 | if (SvAMAGIC(sv)) { |
2885 | sv = amagic_deref_call(sv, to_cv_amg); | |
2886 | /* Don't SPAGAIN here. */ | |
2887 | } | |
7c75014e DM |
2888 | } |
2889 | else { | |
a9c4fd4e | 2890 | const char *sym; |
780a5241 | 2891 | STRLEN len; |
7c75014e | 2892 | sym = SvPV_nomg_const(sv, len); |
15ff848f | 2893 | if (!sym) |
cea2e8a9 | 2894 | DIE(aTHX_ PL_no_usym, "a subroutine"); |
533c011a | 2895 | if (PL_op->op_private & HINT_STRICT_REFS) |
973a7615 | 2896 | DIE(aTHX_ "Can't use string (\"%.32s\"%s) as a subroutine ref while \"strict refs\" in use", sym, len>32 ? "..." : ""); |
780a5241 | 2897 | cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv)); |
a0d0e21e LW |
2898 | break; |
2899 | } | |
ea726b52 | 2900 | cv = MUTABLE_CV(SvRV(sv)); |
a0d0e21e LW |
2901 | if (SvTYPE(cv) == SVt_PVCV) |
2902 | break; | |
2903 | /* FALL THROUGH */ | |
2904 | case SVt_PVHV: | |
2905 | case SVt_PVAV: | |
cea2e8a9 | 2906 | DIE(aTHX_ "Not a CODE reference"); |
f1025168 | 2907 | /* This is the second most common case: */ |
a0d0e21e | 2908 | case SVt_PVCV: |
ea726b52 | 2909 | cv = MUTABLE_CV(sv); |
a0d0e21e | 2910 | break; |
a0d0e21e LW |
2911 | } |
2912 | ||
a57c6685 | 2913 | ENTER; |
a0d0e21e LW |
2914 | SAVETMPS; |
2915 | ||
2916 | retry: | |
541ed3a9 FC |
2917 | if (CvCLONE(cv) && ! CvCLONED(cv)) |
2918 | DIE(aTHX_ "Closure prototype called"); | |
a0d0e21e | 2919 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
2f349aa0 NC |
2920 | GV* autogv; |
2921 | SV* sub_name; | |
2922 | ||
2923 | /* anonymous or undef'd function leaves us no recourse */ | |
2924 | if (CvANON(cv) || !(gv = CvGV(cv))) | |
2925 | DIE(aTHX_ "Undefined subroutine called"); | |
2926 | ||
2927 | /* autoloaded stub? */ | |
2928 | if (cv != GvCV(gv)) { | |
2929 | cv = GvCV(gv); | |
2930 | } | |
2931 | /* should call AUTOLOAD now? */ | |
2932 | else { | |
7e623da3 | 2933 | try_autoload: |
2f349aa0 | 2934 | if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), |
7e623da3 | 2935 | FALSE))) |
2f349aa0 NC |
2936 | { |
2937 | cv = GvCV(autogv); | |
2938 | } | |
2939 | /* sorry */ | |
2940 | else { | |
2941 | sub_name = sv_newmortal(); | |
6136c704 | 2942 | gv_efullname3(sub_name, gv, NULL); |
be2597df | 2943 | DIE(aTHX_ "Undefined subroutine &%"SVf" called", SVfARG(sub_name)); |
2f349aa0 NC |
2944 | } |
2945 | } | |
2946 | if (!cv) | |
2947 | DIE(aTHX_ "Not a CODE reference"); | |
2948 | goto retry; | |
a0d0e21e LW |
2949 | } |
2950 | ||
54310121 | 2951 | gimme = GIMME_V; |
67caa1fe | 2952 | if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) { |
005a8a35 | 2953 | Perl_get_db_sub(aTHX_ &sv, cv); |
a9ef256d NC |
2954 | if (CvISXSUB(cv)) |
2955 | PL_curcopdb = PL_curcop; | |
1ad62f64 BR |
2956 | if (CvLVALUE(cv)) { |
2957 | /* check for lsub that handles lvalue subroutines */ | |
ae5c1e95 | 2958 | cv = GvCV(gv_HVadd(gv_fetchpvs("DB::lsub", GV_ADDMULTI, SVt_PVHV))); |
1ad62f64 BR |
2959 | /* if lsub not found then fall back to DB::sub */ |
2960 | if (!cv) cv = GvCV(PL_DBsub); | |
2961 | } else { | |
2962 | cv = GvCV(PL_DBsub); | |
2963 | } | |
a9ef256d | 2964 | |
ccafdc96 RGS |
2965 | if (!cv || (!CvXSUB(cv) && !CvSTART(cv))) |
2966 | DIE(aTHX_ "No DB::sub routine defined"); | |
67caa1fe | 2967 | } |
a0d0e21e | 2968 | |
aed2304a | 2969 | if (!(CvISXSUB(cv))) { |
f1025168 | 2970 | /* This path taken at least 75% of the time */ |
a0d0e21e LW |
2971 | dMARK; |
2972 | register I32 items = SP - MARK; | |
0bcc34c2 | 2973 | AV* const padlist = CvPADLIST(cv); |
a0d0e21e LW |
2974 | PUSHBLOCK(cx, CXt_SUB, MARK); |
2975 | PUSHSUB(cx); | |
f39bc417 | 2976 | cx->blk_sub.retop = PL_op->op_next; |
a0d0e21e | 2977 | CvDEPTH(cv)++; |
6b35e009 GS |
2978 | /* XXX This would be a natural place to set C<PL_compcv = cv> so |
2979 | * that eval'' ops within this sub know the correct lexical space. | |
a3985cdc DM |
2980 | * Owing the speed considerations, we choose instead to search for |
2981 | * the cv using find_runcv() when calling doeval(). | |
6b35e009 | 2982 | */ |
3a76ca88 RGS |
2983 | if (CvDEPTH(cv) >= 2) { |
2984 | PERL_STACK_OVERFLOW_CHECK(); | |
2985 | pad_push(padlist, CvDEPTH(cv)); | |
a0d0e21e | 2986 | } |
3a76ca88 RGS |
2987 | SAVECOMPPAD(); |
2988 | PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); | |
2989 | if (hasargs) { | |
10533ace | 2990 | AV *const av = MUTABLE_AV(PAD_SVl(0)); |
221373f0 GS |
2991 | if (AvREAL(av)) { |
2992 | /* @_ is normally not REAL--this should only ever | |
2993 | * happen when DB::sub() calls things that modify @_ */ | |
2994 | av_clear(av); | |
2995 | AvREAL_off(av); | |
2996 | AvREIFY_on(av); | |
2997 | } | |
3280af22 | 2998 | cx->blk_sub.savearray = GvAV(PL_defgv); |
502c6561 | 2999 | GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av)); |
dd2155a4 | 3000 | CX_CURPAD_SAVE(cx->blk_sub); |
6d4ff0d2 | 3001 | cx->blk_sub.argarray = av; |
a0d0e21e LW |
3002 | ++MARK; |
3003 | ||
3004 | if (items > AvMAX(av) + 1) { | |
504618e9 | 3005 | SV **ary = AvALLOC(av); |
a0d0e21e LW |
3006 | if (AvARRAY(av) != ary) { |
3007 | AvMAX(av) += AvARRAY(av) - AvALLOC(av); | |
9c6bc640 | 3008 | AvARRAY(av) = ary; |
a0d0e21e LW |
3009 | } |
3010 | if (items > AvMAX(av) + 1) { | |
3011 | AvMAX(av) = items - 1; | |
3012 | Renew(ary,items,SV*); | |
3013 | AvALLOC(av) = ary; | |
9c6bc640 | 3014 | AvARRAY(av) = ary; |
a0d0e21e LW |
3015 | } |
3016 | } | |
3017 | Copy(MARK,AvARRAY(av),items,SV*); | |
93965878 | 3018 | AvFILLp(av) = items - 1; |
1c846c1f | 3019 | |
a0d0e21e LW |
3020 | while (items--) { |
3021 | if (*MARK) | |
3022 | SvTEMP_off(*MARK); | |
3023 | MARK++; | |
3024 | } | |
3025 | } | |
4a925ff6 GS |
3026 | /* warning must come *after* we fully set up the context |
3027 | * stuff so that __WARN__ handlers can safely dounwind() | |
3028 | * if they want to | |
3029 | */ | |
2b9dff67 | 3030 | if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION) |
4a925ff6 GS |
3031 | && !(PERLDB_SUB && cv == GvCV(PL_DBsub))) |
3032 | sub_crush_depth(cv); | |
a0d0e21e LW |
3033 | RETURNOP(CvSTART(cv)); |
3034 | } | |
f1025168 | 3035 | else { |
3a76ca88 | 3036 | I32 markix = TOPMARK; |
f1025168 | 3037 | |
3a76ca88 | 3038 | PUTBACK; |
f1025168 | 3039 | |
3a76ca88 RGS |
3040 | if (!hasargs) { |
3041 | /* Need to copy @_ to stack. Alternative may be to | |
3042 | * switch stack to @_, and copy return values | |
3043 | * back. This would allow popping @_ in XSUB, e.g.. XXXX */ | |
3044 | AV * const av = GvAV(PL_defgv); | |
3045 | const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */ | |
3046 | ||
3047 | if (items) { | |
3048 | /* Mark is at the end of the stack. */ | |
3049 | EXTEND(SP, items); | |
3050 | Copy(AvARRAY(av), SP + 1, items, SV*); | |
3051 | SP += items; | |
3052 | PUTBACK ; | |
3053 | } | |
3054 | } | |
3055 | /* We assume first XSUB in &DB::sub is the called one. */ | |
3056 | if (PL_curcopdb) { | |
3057 | SAVEVPTR(PL_curcop); | |
3058 | PL_curcop = PL_curcopdb; | |
3059 | PL_curcopdb = NULL; | |
3060 | } | |
3061 | /* Do we need to open block here? XXXX */ | |
72df79cf GF |
3062 | |
3063 | /* CvXSUB(cv) must not be NULL because newXS() refuses NULL xsub address */ | |
3064 | assert(CvXSUB(cv)); | |
16c91539 | 3065 | CvXSUB(cv)(aTHX_ cv); |
3a76ca88 RGS |
3066 | |
3067 | /* Enforce some sanity in scalar context. */ | |
3068 | if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) { | |
3069 | if (markix > PL_stack_sp - PL_stack_base) | |
3070 | *(PL_stack_base + markix) = &PL_sv_undef; | |
3071 | else | |
3072 | *(PL_stack_base + markix) = *PL_stack_sp; | |
3073 | PL_stack_sp = PL_stack_base + markix; | |
3074 | } | |
a57c6685 | 3075 | LEAVE; |
f1025168 NC |
3076 | return NORMAL; |
3077 | } | |
a0d0e21e LW |
3078 | } |
3079 | ||
44a8e56a | 3080 | void |
864dbfa3 | 3081 | Perl_sub_crush_depth(pTHX_ CV *cv) |
44a8e56a | 3082 | { |
7918f24d NC |
3083 | PERL_ARGS_ASSERT_SUB_CRUSH_DEPTH; |
3084 | ||
44a8e56a | 3085 | if (CvANON(cv)) |
9014280d | 3086 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine"); |
44a8e56a | 3087 | else { |
aec46f14 | 3088 | SV* const tmpstr = sv_newmortal(); |
6136c704 | 3089 | gv_efullname3(tmpstr, CvGV(cv), NULL); |
35c1215d | 3090 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"", |
be2597df | 3091 | SVfARG(tmpstr)); |
44a8e56a | 3092 | } |
3093 | } | |
3094 | ||
a0d0e21e LW |
3095 | PP(pp_aelem) |
3096 | { | |
97aff369 | 3097 | dVAR; dSP; |
a0d0e21e | 3098 | SV** svp; |
a3b680e6 | 3099 | SV* const elemsv = POPs; |
d804643f | 3100 | IV elem = SvIV(elemsv); |
502c6561 | 3101 | AV *const av = MUTABLE_AV(POPs); |
e1ec3a88 AL |
3102 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
3103 | const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av)); | |
4ad10a0b VP |
3104 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
3105 | bool preeminent = TRUE; | |
be6c24e0 | 3106 | SV *sv; |
a0d0e21e | 3107 | |
e35c1634 | 3108 | if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC)) |
95b63a38 JH |
3109 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
3110 | "Use of reference \"%"SVf"\" as array index", | |
be2597df | 3111 | SVfARG(elemsv)); |
748a9306 | 3112 | if (elem > 0) |
fc15ae8f | 3113 | elem -= CopARYBASE_get(PL_curcop); |
a0d0e21e LW |
3114 | if (SvTYPE(av) != SVt_PVAV) |
3115 | RETPUSHUNDEF; | |
4ad10a0b VP |
3116 | |
3117 | if (localizing) { | |
3118 | MAGIC *mg; | |
3119 | HV *stash; | |
3120 | ||
3121 | /* If we can determine whether the element exist, | |
3122 | * Try to preserve the existenceness of a tied array | |
3123 | * element by using EXISTS and DELETE if possible. | |
3124 | * Fallback to FETCH and STORE otherwise. */ | |
3125 | if (SvCANEXISTDELETE(av)) | |
3126 | preeminent = av_exists(av, elem); | |
3127 | } | |
3128 | ||
68dc0745 | 3129 | svp = av_fetch(av, elem, lval && !defer); |
a0d0e21e | 3130 | if (lval) { |
2b573ace | 3131 | #ifdef PERL_MALLOC_WRAP |
2b573ace | 3132 | if (SvUOK(elemsv)) { |
a9c4fd4e | 3133 | const UV uv = SvUV(elemsv); |
2b573ace JH |
3134 | elem = uv > IV_MAX ? IV_MAX : uv; |
3135 | } | |
3136 | else if (SvNOK(elemsv)) | |
3137 | elem = (IV)SvNV(elemsv); | |
a3b680e6 AL |
3138 | if (elem > 0) { |
3139 | static const char oom_array_extend[] = | |
3140 | "Out of memory during array extend"; /* Duplicated in av.c */ | |
2b573ace | 3141 | MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend); |
a3b680e6 | 3142 | } |
2b573ace | 3143 | #endif |
3280af22 | 3144 | if (!svp || *svp == &PL_sv_undef) { |
68dc0745 | 3145 | SV* lv; |
3146 | if (!defer) | |
cea2e8a9 | 3147 | DIE(aTHX_ PL_no_aelem, elem); |
68dc0745 | 3148 | lv = sv_newmortal(); |
3149 | sv_upgrade(lv, SVt_PVLV); | |
3150 | LvTYPE(lv) = 'y'; | |
a0714e2c | 3151 | sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0); |
b37c2d43 | 3152 | LvTARG(lv) = SvREFCNT_inc_simple(av); |
68dc0745 | 3153 | LvTARGOFF(lv) = elem; |
3154 | LvTARGLEN(lv) = 1; | |
3155 | PUSHs(lv); | |
3156 | RETURN; | |
3157 | } | |
4ad10a0b VP |
3158 | if (localizing) { |
3159 | if (preeminent) | |
3160 | save_aelem(av, elem, svp); | |
3161 | else | |
3162 | SAVEADELETE(av, elem); | |
3163 | } | |
533c011a NIS |
3164 | else if (PL_op->op_private & OPpDEREF) |
3165 | vivify_ref(*svp, PL_op->op_private & OPpDEREF); | |
a0d0e21e | 3166 | } |
3280af22 | 3167 | sv = (svp ? *svp : &PL_sv_undef); |
39cf747a | 3168 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
fd69380d | 3169 | mg_get(sv); |
be6c24e0 | 3170 | PUSHs(sv); |
a0d0e21e LW |
3171 | RETURN; |
3172 | } | |
3173 | ||
02a9e968 | 3174 | void |
864dbfa3 | 3175 | Perl_vivify_ref(pTHX_ SV *sv, U32 to_what) |
02a9e968 | 3176 | { |
7918f24d NC |
3177 | PERL_ARGS_ASSERT_VIVIFY_REF; |
3178 | ||
5b295bef | 3179 | SvGETMAGIC(sv); |
02a9e968 CS |
3180 | if (!SvOK(sv)) { |
3181 | if (SvREADONLY(sv)) | |
6ad8f254 | 3182 | Perl_croak_no_modify(aTHX); |
43230e26 | 3183 | prepare_SV_for_RV(sv); |
68dc0745 | 3184 | switch (to_what) { |
5f05dabc | 3185 | case OPpDEREF_SV: |
561b68a9 | 3186 | SvRV_set(sv, newSV(0)); |
5f05dabc | 3187 | break; |
3188 | case OPpDEREF_AV: | |
ad64d0ec | 3189 | SvRV_set(sv, MUTABLE_SV(newAV())); |
5f05dabc | 3190 | break; |
3191 | case OPpDEREF_HV: | |
ad64d0ec | 3192 | SvRV_set(sv, MUTABLE_SV(newHV())); |
5f05dabc | 3193 | break; |
3194 | } | |
02a9e968 CS |
3195 | SvROK_on(sv); |
3196 | SvSETMAGIC(sv); | |
3197 | } | |
3198 | } | |
3199 | ||
a0d0e21e LW |
3200 | PP(pp_method) |
3201 | { | |
97aff369 | 3202 | dVAR; dSP; |
890ce7af | 3203 | SV* const sv = TOPs; |
f5d5a27c CS |
3204 | |
3205 | if (SvROK(sv)) { | |
890ce7af | 3206 | SV* const rsv = SvRV(sv); |
f5d5a27c CS |
3207 | if (SvTYPE(rsv) == SVt_PVCV) { |
3208 | SETs(rsv); | |
3209 | RETURN; | |
3210 | } | |
3211 | } | |
3212 | ||
4608196e | 3213 | SETs(method_common(sv, NULL)); |
f5d5a27c CS |
3214 | RETURN; |
3215 | } | |
3216 | ||
3217 | PP(pp_method_named) | |
3218 | { | |
97aff369 | 3219 | dVAR; dSP; |
890ce7af | 3220 | SV* const sv = cSVOP_sv; |
c158a4fd | 3221 | U32 hash = SvSHARED_HASH(sv); |
f5d5a27c CS |
3222 | |
3223 | XPUSHs(method_common(sv, &hash)); | |
3224 | RETURN; | |
3225 | } | |
3226 | ||
3227 | STATIC SV * | |
3228 | S_method_common(pTHX_ SV* meth, U32* hashp) | |
3229 | { | |
97aff369 | 3230 | dVAR; |
a0d0e21e LW |
3231 | SV* ob; |
3232 | GV* gv; | |
56304f61 | 3233 | HV* stash; |
6136c704 | 3234 | const char* packname = NULL; |
a0714e2c | 3235 | SV *packsv = NULL; |
ac91690f | 3236 | STRLEN packlen; |
46c461b5 | 3237 | SV * const sv = *(PL_stack_base + TOPMARK + 1); |
f5d5a27c | 3238 | |
7918f24d NC |
3239 | PERL_ARGS_ASSERT_METHOD_COMMON; |
3240 | ||
4f1b7578 | 3241 | if (!sv) |
a214957f VP |
3242 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" on an undefined value", |
3243 | SVfARG(meth)); | |
4f1b7578 | 3244 | |
5b295bef | 3245 | SvGETMAGIC(sv); |
a0d0e21e | 3246 | if (SvROK(sv)) |
ad64d0ec | 3247 | ob = MUTABLE_SV(SvRV(sv)); |
a0d0e21e LW |
3248 | else { |
3249 | GV* iogv; | |
a0d0e21e | 3250 | |
af09ea45 | 3251 | /* this isn't a reference */ |
5c144d81 | 3252 | if(SvOK(sv) && (packname = SvPV_const(sv, packlen))) { |
b464bac0 | 3253 | const HE* const he = hv_fetch_ent(PL_stashcache, sv, 0, 0); |
081fc587 | 3254 | if (he) { |
5e6396ae | 3255 | stash = INT2PTR(HV*,SvIV(HeVAL(he))); |
081fc587 AB |
3256 | goto fetch; |
3257 | } | |
3258 | } | |
3259 | ||
a0d0e21e | 3260 | if (!SvOK(sv) || |
05f5af9a | 3261 | !(packname) || |
f776e3cd | 3262 | !(iogv = gv_fetchsv(sv, 0, SVt_PVIO)) || |
ad64d0ec | 3263 | !(ob=MUTABLE_SV(GvIO(iogv)))) |
a0d0e21e | 3264 | { |
af09ea45 | 3265 | /* this isn't the name of a filehandle either */ |
1c846c1f | 3266 | if (!packname || |
fd400ab9 | 3267 | ((UTF8_IS_START(*packname) && DO_UTF8(sv)) |
b86a2fa7 | 3268 | ? !isIDFIRST_utf8((U8*)packname) |
834a4ddd LW |
3269 | : !isIDFIRST(*packname) |
3270 | )) | |
3271 | { | |
a214957f VP |
3272 | Perl_croak(aTHX_ "Can't call method \"%"SVf"\" %s", |
3273 | SVfARG(meth), | |
f5d5a27c CS |
3274 | SvOK(sv) ? "without a package or object reference" |
3275 | : "on an undefined value"); | |
834a4ddd | 3276 | } |
af09ea45 | 3277 | /* assume it's a package name */ |
da51bb9b | 3278 | stash = gv_stashpvn(packname, packlen, 0); |
0dae17bd GS |
3279 | if (!stash) |
3280 | packsv = sv; | |
081fc587 | 3281 | else { |
d4c19fe8 | 3282 | SV* const ref = newSViv(PTR2IV(stash)); |
04fe65b0 | 3283 | (void)hv_store(PL_stashcache, packname, packlen, ref, 0); |
7e8961ec | 3284 | } |
ac91690f | 3285 | goto fetch; |
a0d0e21e | 3286 | } |
af09ea45 | 3287 | /* it _is_ a filehandle name -- replace with a reference */ |
ad64d0ec | 3288 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(MUTABLE_SV(iogv))); |
a0d0e21e LW |
3289 | } |
3290 | ||
af09ea45 | 3291 | /* if we got here, ob should be a reference or a glob */ |
f0d43078 | 3292 | if (!ob || !(SvOBJECT(ob) |
6e592b3a BM |
3293 | || (SvTYPE(ob) == SVt_PVGV |
3294 | && isGV_with_GP(ob) | |
159b6efe | 3295 | && (ob = MUTABLE_SV(GvIO((const GV *)ob))) |
f0d43078 GS |
3296 | && SvOBJECT(ob)))) |
3297 | { | |
a214957f | 3298 | const char * const name = SvPV_nolen_const(meth); |
f5d5a27c | 3299 | Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference", |
59e7186f | 3300 | (SvSCREAM(meth) && strEQ(name,"isa")) ? "DOES" : |
f5d5a27c | 3301 | name); |
f0d43078 | 3302 | } |
a0d0e21e | 3303 | |
56304f61 | 3304 | stash = SvSTASH(ob); |
a0d0e21e | 3305 | |
ac91690f | 3306 | fetch: |
af09ea45 IK |
3307 | /* NOTE: stash may be null, hope hv_fetch_ent and |
3308 | gv_fetchmethod can cope (it seems they can) */ | |
3309 | ||
f5d5a27c CS |
3310 | /* shortcut for simple names */ |
3311 | if (hashp) { | |
b464bac0 | 3312 | const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp); |
f5d5a27c | 3313 | if (he) { |
159b6efe | 3314 | gv = MUTABLE_GV(HeVAL(he)); |
f5d5a27c | 3315 | if (isGV(gv) && GvCV(gv) && |
e1a479c5 | 3316 | (!GvCVGEN(gv) || GvCVGEN(gv) |
dd69841b | 3317 | == (PL_sub_generation + HvMROMETA(stash)->cache_gen))) |
ad64d0ec | 3318 | return MUTABLE_SV(GvCV(gv)); |
f5d5a27c CS |
3319 | } |
3320 | } | |
3321 | ||
a214957f VP |
3322 | gv = gv_fetchmethod_flags(stash ? stash : MUTABLE_HV(packsv), |
3323 | SvPV_nolen_const(meth), | |
256d1bb2 | 3324 | GV_AUTOLOAD | GV_CROAK); |
9b9d0b15 | 3325 | |
256d1bb2 | 3326 | assert(gv); |
9b9d0b15 | 3327 | |
ad64d0ec | 3328 | return isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv); |
a0d0e21e | 3329 | } |
241d1a3b NC |
3330 | |
3331 | /* | |
3332 | * Local variables: | |
3333 | * c-indentation-style: bsd | |
3334 | * c-basic-offset: 4 | |
3335 | * indent-tabs-mode: t | |
3336 | * End: | |
3337 | * | |
37442d52 RGS |
3338 | * ex: set ts=8 sts=4 sw=4 noet: |
3339 | */ |