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 | { | |
39644a26 | 42 | dSP; |
996c9baa | 43 | XPUSHs(cSVOP_sv); |
a0d0e21e LW |
44 | RETURN; |
45 | } | |
46 | ||
47 | PP(pp_nextstate) | |
48 | { | |
533c011a | 49 | PL_curcop = (COP*)PL_op; |
a0d0e21e | 50 | TAINT_NOT; /* Each statement is presumed innocent */ |
4ebe6e95 | 51 | PL_stack_sp = PL_stack_base + CX_CUR()->blk_oldsp; |
a0d0e21e | 52 | FREETMPS; |
f410a211 | 53 | PERL_ASYNC_CHECK(); |
a0d0e21e LW |
54 | return NORMAL; |
55 | } | |
56 | ||
57 | PP(pp_gvsv) | |
58 | { | |
39644a26 | 59 | dSP; |
924508f0 | 60 | EXTEND(SP,1); |
5d9574c1 | 61 | if (UNLIKELY(PL_op->op_private & OPpLVAL_INTRO)) |
1d7c1841 | 62 | PUSHs(save_scalar(cGVOP_gv)); |
a0d0e21e | 63 | else |
c69033f2 | 64 | PUSHs(GvSVn(cGVOP_gv)); |
a0d0e21e LW |
65 | RETURN; |
66 | } | |
67 | ||
b1c05ba5 DM |
68 | |
69 | /* also used for: pp_lineseq() pp_regcmaybe() pp_scalar() pp_scope() */ | |
70 | ||
a0d0e21e LW |
71 | PP(pp_null) |
72 | { | |
73 | return NORMAL; | |
74 | } | |
75 | ||
3dd9d4e4 FC |
76 | /* This is sometimes called directly by pp_coreargs, pp_grepstart and |
77 | amagic_call. */ | |
a0d0e21e LW |
78 | PP(pp_pushmark) |
79 | { | |
3280af22 | 80 | PUSHMARK(PL_stack_sp); |
a0d0e21e LW |
81 | return NORMAL; |
82 | } | |
83 | ||
84 | PP(pp_stringify) | |
85 | { | |
20b7effb | 86 | dSP; dTARGET; |
4cc783ef DD |
87 | SV * const sv = TOPs; |
88 | SETs(TARG); | |
89 | sv_copypv(TARG, sv); | |
90 | SvSETMAGIC(TARG); | |
91 | /* no PUTBACK, SETs doesn't inc/dec SP */ | |
92 | return NORMAL; | |
a0d0e21e LW |
93 | } |
94 | ||
95 | PP(pp_gv) | |
96 | { | |
20b7effb | 97 | dSP; |
ad64d0ec | 98 | XPUSHs(MUTABLE_SV(cGVOP_gv)); |
a0d0e21e LW |
99 | RETURN; |
100 | } | |
101 | ||
b1c05ba5 DM |
102 | |
103 | /* also used for: pp_andassign() */ | |
104 | ||
a0d0e21e LW |
105 | PP(pp_and) |
106 | { | |
f410a211 | 107 | PERL_ASYNC_CHECK(); |
4cc783ef DD |
108 | { |
109 | /* SP is not used to remove a variable that is saved across the | |
110 | sv_2bool_flags call in SvTRUE_NN, if a RISC/CISC or low/high machine | |
111 | register or load/store vs direct mem ops macro is introduced, this | |
112 | should be a define block between direct PL_stack_sp and dSP operations, | |
113 | presently, using PL_stack_sp is bias towards CISC cpus */ | |
114 | SV * const sv = *PL_stack_sp; | |
115 | if (!SvTRUE_NN(sv)) | |
116 | return NORMAL; | |
117 | else { | |
118 | if (PL_op->op_type == OP_AND) | |
119 | --PL_stack_sp; | |
120 | return cLOGOP->op_other; | |
121 | } | |
a0d0e21e LW |
122 | } |
123 | } | |
124 | ||
125 | PP(pp_sassign) | |
126 | { | |
20b7effb | 127 | dSP; |
3e75a3c4 RU |
128 | /* sassign keeps its args in the optree traditionally backwards. |
129 | So we pop them differently. | |
130 | */ | |
131 | SV *left = POPs; SV *right = TOPs; | |
748a9306 | 132 | |
354eabfa | 133 | if (PL_op->op_private & OPpASSIGN_BACKWARDS) { /* {or,and,dor}assign */ |
0bd48802 AL |
134 | SV * const temp = left; |
135 | left = right; right = temp; | |
a0d0e21e | 136 | } |
d48c660d DM |
137 | assert(TAINTING_get || !TAINT_get); |
138 | if (UNLIKELY(TAINT_get) && !SvTAINTED(right)) | |
a0d0e21e | 139 | TAINT_NOT; |
5d9574c1 DM |
140 | if (UNLIKELY(PL_op->op_private & OPpASSIGN_CV_TO_GV)) { |
141 | /* *foo =\&bar */ | |
3e75a3c4 | 142 | SV * const cv = SvRV(right); |
e26df76a | 143 | const U32 cv_type = SvTYPE(cv); |
3e75a3c4 | 144 | const bool is_gv = isGV_with_GP(left); |
6136c704 | 145 | const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM; |
e26df76a NC |
146 | |
147 | if (!got_coderef) { | |
148 | assert(SvROK(cv)); | |
149 | } | |
150 | ||
3e75a3c4 RU |
151 | /* Can do the optimisation if left (LVALUE) is not a typeglob, |
152 | right (RVALUE) is a reference to something, and we're in void | |
e26df76a | 153 | context. */ |
13be902c | 154 | if (!got_coderef && !is_gv && GIMME_V == G_VOID) { |
e26df76a | 155 | /* Is the target symbol table currently empty? */ |
3e75a3c4 | 156 | GV * const gv = gv_fetchsv_nomg(left, GV_NOINIT, SVt_PVGV); |
bb112e5a | 157 | if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) { |
e26df76a NC |
158 | /* Good. Create a new proxy constant subroutine in the target. |
159 | The gv becomes a(nother) reference to the constant. */ | |
160 | SV *const value = SvRV(cv); | |
161 | ||
ad64d0ec | 162 | SvUPGRADE(MUTABLE_SV(gv), SVt_IV); |
1ccdb730 | 163 | SvPCS_IMPORTED_on(gv); |
e26df76a | 164 | SvRV_set(gv, value); |
b37c2d43 | 165 | SvREFCNT_inc_simple_void(value); |
3e75a3c4 | 166 | SETs(left); |
e26df76a NC |
167 | RETURN; |
168 | } | |
169 | } | |
170 | ||
171 | /* Need to fix things up. */ | |
13be902c | 172 | if (!is_gv) { |
e26df76a | 173 | /* Need to fix GV. */ |
3e75a3c4 | 174 | left = MUTABLE_SV(gv_fetchsv_nomg(left,GV_ADD, SVt_PVGV)); |
e26df76a NC |
175 | } |
176 | ||
177 | if (!got_coderef) { | |
178 | /* We've been returned a constant rather than a full subroutine, | |
179 | but they expect a subroutine reference to apply. */ | |
53a42478 | 180 | if (SvROK(cv)) { |
d343c3ef | 181 | ENTER_with_name("sassign_coderef"); |
53a42478 NC |
182 | SvREFCNT_inc_void(SvRV(cv)); |
183 | /* newCONSTSUB takes a reference count on the passed in SV | |
184 | from us. We set the name to NULL, otherwise we get into | |
185 | all sorts of fun as the reference to our new sub is | |
186 | donated to the GV that we're about to assign to. | |
187 | */ | |
3e75a3c4 | 188 | SvRV_set(right, MUTABLE_SV(newCONSTSUB(GvSTASH(left), NULL, |
ad64d0ec | 189 | SvRV(cv)))); |
fc2b2dca | 190 | SvREFCNT_dec_NN(cv); |
d343c3ef | 191 | LEAVE_with_name("sassign_coderef"); |
53a42478 NC |
192 | } else { |
193 | /* What can happen for the corner case *{"BONK"} = \&{"BONK"}; | |
194 | is that | |
195 | First: ops for \&{"BONK"}; return us the constant in the | |
196 | symbol table | |
197 | Second: ops for *{"BONK"} cause that symbol table entry | |
198 | (and our reference to it) to be upgraded from RV | |
199 | to typeblob) | |
200 | Thirdly: We get here. cv is actually PVGV now, and its | |
201 | GvCV() is actually the subroutine we're looking for | |
202 | ||
203 | So change the reference so that it points to the subroutine | |
204 | of that typeglob, as that's what they were after all along. | |
205 | */ | |
159b6efe | 206 | GV *const upgraded = MUTABLE_GV(cv); |
53a42478 NC |
207 | CV *const source = GvCV(upgraded); |
208 | ||
209 | assert(source); | |
210 | assert(CvFLAGS(source) & CVf_CONST); | |
211 | ||
0ad694a7 | 212 | SvREFCNT_inc_simple_void_NN(source); |
fc2b2dca | 213 | SvREFCNT_dec_NN(upgraded); |
3e75a3c4 | 214 | SvRV_set(right, MUTABLE_SV(source)); |
53a42478 | 215 | } |
e26df76a | 216 | } |
53a42478 | 217 | |
e26df76a | 218 | } |
8fe85e3f | 219 | if ( |
5d9574c1 | 220 | UNLIKELY(SvTEMP(left)) && !SvSMAGICAL(left) && SvREFCNT(left) == 1 && |
3e75a3c4 | 221 | (!isGV_with_GP(left) || SvFAKE(left)) && ckWARN(WARN_MISC) |
8fe85e3f FC |
222 | ) |
223 | Perl_warner(aTHX_ | |
224 | packWARN(WARN_MISC), "Useless assignment to a temporary" | |
225 | ); | |
3e75a3c4 RU |
226 | SvSetMagicSV(left, right); |
227 | SETs(left); | |
a0d0e21e LW |
228 | RETURN; |
229 | } | |
230 | ||
231 | PP(pp_cond_expr) | |
232 | { | |
20b7effb | 233 | dSP; |
f4c975aa DM |
234 | SV *sv; |
235 | ||
f410a211 | 236 | PERL_ASYNC_CHECK(); |
f4c975aa DM |
237 | sv = POPs; |
238 | RETURNOP(SvTRUE_NN(sv) ? cLOGOP->op_other : cLOGOP->op_next); | |
a0d0e21e LW |
239 | } |
240 | ||
241 | PP(pp_unstack) | |
242 | { | |
f5319de9 | 243 | PERL_CONTEXT *cx; |
8f3964af | 244 | PERL_ASYNC_CHECK(); |
a0d0e21e | 245 | TAINT_NOT; /* Each statement is presumed innocent */ |
4ebe6e95 | 246 | cx = CX_CUR(); |
f5319de9 | 247 | PL_stack_sp = PL_stack_base + cx->blk_oldsp; |
a0d0e21e | 248 | FREETMPS; |
eae48c89 | 249 | if (!(PL_op->op_flags & OPf_SPECIAL)) { |
93661e56 | 250 | assert(CxTYPE(cx) == CXt_BLOCK || CxTYPE_is_LOOP(cx)); |
dfe0f39b | 251 | CX_LEAVE_SCOPE(cx); |
eae48c89 | 252 | } |
a0d0e21e LW |
253 | return NORMAL; |
254 | } | |
255 | ||
16fe3f8a DM |
256 | |
257 | /* The main body of pp_concat, not including the magic/overload and | |
258 | * stack handling. | |
259 | * It does targ = left . right. | |
260 | * Moved into a separate function so that pp_multiconcat() can use it | |
261 | * too. | |
262 | */ | |
263 | ||
264 | PERL_STATIC_INLINE void | |
265 | S_do_concat(pTHX_ SV *left, SV *right, SV *targ, U8 targmy) | |
a0d0e21e | 266 | { |
8d6d96c1 HS |
267 | bool lbyte; |
268 | STRLEN rlen; | |
d4c19fe8 | 269 | const char *rpv = NULL; |
a6b599c7 | 270 | bool rbyte = FALSE; |
a9c4fd4e | 271 | bool rcopied = FALSE; |
8d6d96c1 | 272 | |
6f1401dc DM |
273 | if (TARG == right && right != left) { /* $r = $l.$r */ |
274 | rpv = SvPV_nomg_const(right, rlen); | |
c75ab21a | 275 | rbyte = !DO_UTF8(right); |
59cd0e26 | 276 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
349d4f2f | 277 | rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */ |
db79b45b | 278 | rcopied = TRUE; |
8d6d96c1 | 279 | } |
7889fe52 | 280 | |
89734059 | 281 | if (TARG != left) { /* not $l .= $r */ |
a9c4fd4e | 282 | STRLEN llen; |
6f1401dc | 283 | const char* const lpv = SvPV_nomg_const(left, llen); |
90f5826e | 284 | lbyte = !DO_UTF8(left); |
8d6d96c1 HS |
285 | sv_setpvn(TARG, lpv, llen); |
286 | if (!lbyte) | |
287 | SvUTF8_on(TARG); | |
288 | else | |
289 | SvUTF8_off(TARG); | |
290 | } | |
18ea7bf2 S |
291 | else { /* $l .= $r and left == TARG */ |
292 | if (!SvOK(left)) { | |
51f69a24 | 293 | if ((left == right /* $l .= $l */ |
16fe3f8a | 294 | || targmy) /* $l = $l . $r */ |
51f69a24 AC |
295 | && ckWARN(WARN_UNINITIALIZED) |
296 | ) | |
297 | report_uninit(left); | |
adf14ec6 | 298 | SvPVCLEAR(left); |
c75ab21a | 299 | } |
18ea7bf2 S |
300 | else { |
301 | SvPV_force_nomg_nolen(left); | |
302 | } | |
583a5589 | 303 | lbyte = !DO_UTF8(left); |
90f5826e | 304 | if (IN_BYTES) |
18ea7bf2 | 305 | SvUTF8_off(left); |
8d6d96c1 | 306 | } |
a12c0f56 | 307 | |
c75ab21a | 308 | if (!rcopied) { |
6f1401dc | 309 | rpv = SvPV_nomg_const(right, rlen); |
c75ab21a RH |
310 | rbyte = !DO_UTF8(right); |
311 | } | |
8d6d96c1 HS |
312 | if (lbyte != rbyte) { |
313 | if (lbyte) | |
314 | sv_utf8_upgrade_nomg(TARG); | |
315 | else { | |
db79b45b | 316 | if (!rcopied) |
59cd0e26 | 317 | right = newSVpvn_flags(rpv, rlen, SVs_TEMP); |
8d6d96c1 | 318 | sv_utf8_upgrade_nomg(right); |
6f1401dc | 319 | rpv = SvPV_nomg_const(right, rlen); |
69b47968 | 320 | } |
a0d0e21e | 321 | } |
8d6d96c1 | 322 | sv_catpvn_nomg(TARG, rpv, rlen); |
16fe3f8a DM |
323 | SvSETMAGIC(TARG); |
324 | } | |
325 | ||
43ebc500 | 326 | |
16fe3f8a DM |
327 | PP(pp_concat) |
328 | { | |
329 | dSP; dATARGET; tryAMAGICbin_MG(concat_amg, AMGf_assign); | |
330 | { | |
331 | dPOPTOPssrl; | |
332 | S_do_concat(aTHX_ left, right, targ, PL_op->op_private & OPpTARGET_MY); | |
333 | SETs(TARG); | |
a0d0e21e | 334 | RETURN; |
748a9306 | 335 | } |
a0d0e21e LW |
336 | } |
337 | ||
e839e6ed DM |
338 | |
339 | /* pp_multiconcat() | |
340 | ||
341 | Concatenate one or more args, possibly interleaved with constant string | |
342 | segments. The result may be assigned to, or appended to, a variable or | |
343 | expression. | |
344 | ||
345 | Several op_flags and/or op_private bits indicate what the target is, and | |
346 | whether it's appended to. Valid permutations are: | |
347 | ||
348 | - (PADTMP) = (A.B.C....) | |
349 | OPpTARGET_MY $lex = (A.B.C....) | |
350 | OPpTARGET_MY,OPpLVAL_INTRO my $lex = (A.B.C....) | |
351 | OPpTARGET_MY,OPpMULTICONCAT_APPEND $lex .= (A.B.C....) | |
352 | OPf_STACKED expr = (A.B.C....) | |
353 | OPf_STACKED,OPpMULTICONCAT_APPEND expr .= (A.B.C....) | |
354 | ||
355 | Other combinations like (A.B).(C.D) are not optimised into a multiconcat | |
356 | op, as it's too hard to get the correct ordering of ties, overload etc. | |
357 | ||
358 | In addition: | |
359 | ||
360 | OPpMULTICONCAT_FAKE: not a real concat, instead an optimised | |
361 | sprintf "...%s...". Don't call '.' | |
362 | overloading: only use '""' overloading. | |
363 | ||
55b62dee DM |
364 | OPpMULTICONCAT_STRINGIFY: the RHS was of the form |
365 | "...$a...$b..." rather than | |
e839e6ed DM |
366 | "..." . $a . "..." . $b . "..." |
367 | ||
368 | An OP_MULTICONCAT is of type UNOP_AUX. The fixed slots of the aux array are | |
369 | defined with PERL_MULTICONCAT_IX_FOO constants, where: | |
370 | ||
371 | ||
372 | FOO index description | |
373 | -------- ----- ---------------------------------- | |
374 | NARGS 0 number of arguments | |
375 | PLAIN_PV 1 non-utf8 constant string | |
376 | PLAIN_LEN 2 non-utf8 constant string length | |
377 | UTF8_PV 3 utf8 constant string | |
378 | UTF8_LEN 4 utf8 constant string length | |
379 | LENGTHS 5 first of nargs+1 const segment lengths | |
380 | ||
381 | The idea is that a general string concatenation will have a fixed (known | |
382 | at compile time) number of variable args, interspersed with constant | |
383 | strings, e.g. "a=$a b=$b\n" | |
384 | ||
385 | All the constant string segments "a=", " b=" and "\n" are stored as a | |
386 | single string "a= b=\n", pointed to from the PLAIN_PV/UTF8_PV slot, along | |
387 | with a series of segment lengths: e.g. 2,3,1. In the case where the | |
388 | constant string is plain but has a different utf8 representation, both | |
389 | variants are stored, and two sets of (nargs+1) segments lengths are stored | |
390 | in the slots beginning at PERL_MULTICONCAT_IX_LENGTHS. | |
391 | ||
392 | A segment length of -1 indicates that there is no constant string at that | |
393 | point; this distinguishes between e.g. ($a . $b) and ($a . "" . $b), which | |
394 | have differing overloading behaviour. | |
395 | ||
396 | */ | |
397 | ||
398 | PP(pp_multiconcat) | |
399 | { | |
400 | dSP; | |
401 | SV *targ; /* The SV to be assigned or appended to */ | |
057ba76a | 402 | char *targ_pv; /* where within SvPVX(targ) we're writing to */ |
e839e6ed DM |
403 | STRLEN targ_len; /* SvCUR(targ) */ |
404 | SV **toparg; /* the highest arg position on the stack */ | |
405 | UNOP_AUX_item *aux; /* PL_op->op_aux buffer */ | |
406 | UNOP_AUX_item *const_lens; /* the segment length array part of aux */ | |
407 | const char *const_pv; /* the current segment of the const string buf */ | |
ca84e88e DM |
408 | SSize_t nargs; /* how many args were expected */ |
409 | SSize_t stack_adj; /* how much to adjust SP on return */ | |
057ba76a | 410 | STRLEN grow; /* final size of destination string (targ) */ |
e839e6ed DM |
411 | UV targ_count; /* how many times targ has appeared on the RHS */ |
412 | bool is_append; /* OPpMULTICONCAT_APPEND flag is set */ | |
413 | bool slow_concat; /* args too complex for quick concat */ | |
414 | U32 dst_utf8; /* the result will be utf8 (indicate this with | |
415 | SVf_UTF8 in a U32, rather than using bool, | |
416 | for ease of testing and setting) */ | |
417 | /* for each arg, holds the result of an SvPV() call */ | |
418 | struct multiconcat_svpv { | |
419 | char *pv; | |
420 | SSize_t len; | |
421 | } | |
422 | *targ_chain, /* chain of slots where targ has appeared on RHS */ | |
423 | *svpv_p, /* ptr for looping through svpv_buf */ | |
424 | *svpv_base, /* first slot (may be greater than svpv_buf), */ | |
425 | *svpv_end, /* and slot after highest result so far, of: */ | |
426 | svpv_buf[PERL_MULTICONCAT_MAXARG]; /* buf for storing SvPV() results */ | |
427 | ||
428 | aux = cUNOP_AUXx(PL_op)->op_aux; | |
ca84e88e | 429 | stack_adj = nargs = aux[PERL_MULTICONCAT_IX_NARGS].ssize; |
e839e6ed DM |
430 | is_append = cBOOL(PL_op->op_private & OPpMULTICONCAT_APPEND); |
431 | ||
432 | /* get targ from the stack or pad */ | |
433 | ||
434 | if (PL_op->op_flags & OPf_STACKED) { | |
435 | if (is_append) { | |
436 | /* for 'expr .= ...', expr is the bottom item on the stack */ | |
437 | targ = SP[-nargs]; | |
438 | stack_adj++; | |
439 | } | |
440 | else | |
441 | /* for 'expr = ...', expr is the top item on the stack */ | |
442 | targ = POPs; | |
443 | } | |
444 | else { | |
445 | SV **svp = &(PAD_SVl(PL_op->op_targ)); | |
446 | targ = *svp; | |
447 | if (PL_op->op_private & OPpLVAL_INTRO) { | |
448 | assert(PL_op->op_private & OPpTARGET_MY); | |
449 | save_clearsv(svp); | |
450 | } | |
451 | if (!nargs) | |
452 | /* $lex .= "const" doesn't cause anything to be pushed */ | |
453 | EXTEND(SP,1); | |
454 | } | |
455 | ||
456 | toparg = SP; | |
457 | SP -= (nargs - 1); | |
e839e6ed DM |
458 | grow = 1; /* allow for '\0' at minimum */ |
459 | targ_count = 0; | |
460 | targ_chain = NULL; | |
461 | targ_len = 0; | |
462 | svpv_end = svpv_buf; | |
463 | /* only utf8 variants of the const strings? */ | |
464 | dst_utf8 = aux[PERL_MULTICONCAT_IX_PLAIN_PV].pv ? 0 : SVf_UTF8; | |
465 | ||
466 | ||
467 | /* -------------------------------------------------------------- | |
468 | * Phase 1: | |
469 | * | |
470 | * stringify (i.e. SvPV()) every arg and store the resultant pv/len/utf8 | |
471 | * triplets in svpv_buf[]. Also increment 'grow' by the args' lengths. | |
472 | * | |
473 | * utf8 is indicated by storing a negative length. | |
474 | * | |
475 | * Where an arg is actually targ, the stringification is deferred: | |
476 | * the length is set to 0, and the slot is added to targ_chain. | |
477 | * | |
af390142 DM |
478 | * If a magic, overloaded, or otherwise weird arg is found, which |
479 | * might have side effects when stringified, the loop is abandoned and | |
480 | * we goto a code block where a more basic 'emulate calling | |
481 | * pp_cpncat() on each arg in turn' is done. | |
e839e6ed DM |
482 | */ |
483 | ||
484 | for (; SP <= toparg; SP++, svpv_end++) { | |
e839e6ed DM |
485 | U32 utf8; |
486 | STRLEN len; | |
487 | SV *sv; | |
488 | ||
489 | assert(svpv_end - svpv_buf < PERL_MULTICONCAT_MAXARG); | |
490 | ||
491 | sv = *SP; | |
e839e6ed DM |
492 | |
493 | /* this if/else chain is arranged so that common/simple cases | |
494 | * take few conditionals */ | |
495 | ||
af390142 DM |
496 | if (LIKELY((SvFLAGS(sv) & (SVs_GMG|SVf_ROK|SVf_POK)) == SVf_POK)) { |
497 | /* common case: sv is a simple non-magical PV */ | |
498 | if (targ == sv) { | |
499 | /* targ appears on RHS. | |
500 | * Delay storing PV pointer; instead, add slot to targ_chain | |
501 | * so it can be populated later, after targ has been grown and | |
502 | * we know its final SvPVX() address. | |
503 | */ | |
504 | targ_on_rhs: | |
505 | svpv_end->len = 0; /* zerojng here means we can skip | |
506 | updating later if targ_len == 0 */ | |
507 | svpv_end->pv = (char*)targ_chain; | |
508 | targ_chain = svpv_end; | |
509 | targ_count++; | |
510 | continue; | |
511 | } | |
512 | ||
e839e6ed | 513 | len = SvCUR(sv); |
af390142 | 514 | svpv_end->pv = SvPVX(sv); |
e839e6ed | 515 | } |
af390142 DM |
516 | else if (UNLIKELY(SvFLAGS(sv) & (SVs_GMG|SVf_ROK))) |
517 | /* may have side effects: tie, overload etc. | |
518 | * Abandon 'stringify everything first' and handle | |
519 | * args in strict order. Note that already-stringified args | |
520 | * will be reprocessed, which is safe because the each first | |
521 | * stringification would have been idempotent. | |
e839e6ed | 522 | */ |
af390142 DM |
523 | goto do_magical; |
524 | else if (SvNIOK(sv)) { | |
525 | if (targ == sv) | |
526 | goto targ_on_rhs; | |
527 | /* stringify general valid scalar */ | |
e839e6ed DM |
528 | svpv_end->pv = sv_2pv_flags(sv, &len, 0); |
529 | } | |
af390142 DM |
530 | else if (!SvOK(sv)) { |
531 | if (ckWARN(WARN_UNINITIALIZED)) | |
532 | /* an undef value in the presence of warnings may trigger | |
533 | * side affects */ | |
534 | goto do_magical; | |
535 | svpv_end->pv = (char*)""; | |
536 | len = 0; | |
537 | } | |
538 | else | |
539 | goto do_magical; /* something weird */ | |
e839e6ed DM |
540 | |
541 | utf8 = (SvFLAGS(sv) & SVf_UTF8); | |
542 | dst_utf8 |= utf8; | |
543 | ASSUME(len < SSize_t_MAX); | |
544 | svpv_end->len = utf8 ? -(SSize_t)len : (SSize_t)len; | |
545 | grow += len; | |
546 | } | |
547 | ||
548 | /* -------------------------------------------------------------- | |
549 | * Phase 2: | |
550 | * | |
551 | * Stringify targ: | |
552 | * | |
553 | * if targ appears on the RHS or is appended to, force stringify it; | |
554 | * otherwise set it to "". Then set targ_len. | |
555 | */ | |
556 | ||
557 | if (is_append) { | |
af390142 DM |
558 | /* abandon quick route if using targ might have side effects */ |
559 | if (UNLIKELY(SvFLAGS(targ) & (SVs_GMG|SVf_ROK))) | |
560 | goto do_magical; | |
e839e6ed DM |
561 | |
562 | if (SvOK(targ)) { | |
563 | U32 targ_utf8; | |
564 | stringify_targ: | |
565 | SvPV_force_nomg_nolen(targ); | |
566 | targ_utf8 = SvFLAGS(targ) & SVf_UTF8; | |
567 | if (UNLIKELY(dst_utf8 & ~targ_utf8)) { | |
568 | if (LIKELY(!IN_BYTES)) | |
569 | sv_utf8_upgrade_nomg(targ); | |
570 | } | |
571 | else | |
572 | dst_utf8 |= targ_utf8; | |
573 | ||
574 | targ_len = SvCUR(targ); | |
575 | grow += targ_len * (targ_count + is_append); | |
576 | goto phase3; | |
577 | } | |
af390142 DM |
578 | else if (ckWARN(WARN_UNINITIALIZED)) |
579 | /* warning might have side effects */ | |
580 | goto do_magical; | |
581 | /* the undef targ will be silently SvPVCLEAR()ed below */ | |
e839e6ed DM |
582 | } |
583 | else if (UNLIKELY(SvTYPE(targ) >= SVt_REGEXP)) { | |
584 | /* Assigning to some weird LHS type. Don't force the LHS to be an | |
585 | * empty string; instead, do things 'long hand' by using the | |
586 | * overload code path, which concats to a TEMP sv and does | |
587 | * sv_catsv() calls rather than COPY()s. This ensures that even | |
588 | * bizarre code like this doesn't break or crash: | |
589 | * *F = *F . *F. | |
590 | * (which makes the 'F' typeglob an alias to the | |
591 | * '*main::F*main::F' typeglob). | |
592 | */ | |
af390142 | 593 | goto do_magical; |
e839e6ed | 594 | } |
af390142 | 595 | else if (targ_chain) |
e839e6ed | 596 | /* targ was found on RHS. |
af390142 DM |
597 | * Force stringify it, using the same code as the append branch |
598 | * above, except that we don't need the magic/overload/undef | |
599 | * checks as these will already have been done in the phase 1 | |
600 | * loop. | |
e839e6ed | 601 | */ |
e839e6ed | 602 | goto stringify_targ; |
e839e6ed DM |
603 | |
604 | /* unrolled SvPVCLEAR() - mostly: no need to grow or set SvCUR() to 0; | |
605 | * those will be done later. */ | |
e839e6ed DM |
606 | SV_CHECK_THINKFIRST_COW_DROP(targ); |
607 | SvUPGRADE(targ, SVt_PV); | |
608 | SvFLAGS(targ) &= ~(SVf_OK|SVf_IVisUV|SVf_UTF8); | |
609 | SvFLAGS(targ) |= (SVf_POK|SVp_POK|dst_utf8); | |
610 | ||
611 | phase3: | |
612 | ||
613 | /* -------------------------------------------------------------- | |
614 | * Phase 3: | |
615 | * | |
057ba76a | 616 | * UTF-8 tweaks and grow targ: |
e839e6ed DM |
617 | * |
618 | * Now that we know the length and utf8-ness of both the targ and | |
057ba76a | 619 | * args, grow targ to the size needed to accumulate all the args, based |
e839e6ed DM |
620 | * on whether targ appears on the RHS, whether we're appending, and |
621 | * whether any non-utf8 args expand in size if converted to utf8. | |
622 | * | |
623 | * For the latter, if dst_utf8 we scan non-utf8 args looking for | |
624 | * variant chars, and adjust the svpv->len value of those args to the | |
625 | * utf8 size and negate it to flag them. At the same time we un-negate | |
626 | * the lens of any utf8 args since after this phase we no longer care | |
627 | * whether an arg is utf8 or not. | |
628 | * | |
629 | * Finally, initialise const_lens and const_pv based on utf8ness. | |
630 | * Note that there are 3 permutations: | |
631 | * | |
632 | * * If the constant string is invariant whether utf8 or not (e.g. "abc"), | |
633 | * then aux[PERL_MULTICONCAT_IX_PLAIN_PV/LEN] are the same as | |
634 | * aux[PERL_MULTICONCAT_IX_UTF8_PV/LEN] and there is one set of | |
635 | * segment lengths. | |
636 | * | |
637 | * * If the string is fully utf8, e.g. "\x{100}", then | |
638 | * aux[PERL_MULTICONCAT_IX_PLAIN_PV/LEN] == (NULL,0) and there is | |
639 | * one set of segment lengths. | |
640 | * | |
641 | * * If the string has different plain and utf8 representations | |
642 | * (e.g. "\x80"), then then aux[PERL_MULTICONCAT_IX_PLAIN_PV/LEN]] | |
643 | * holds the plain rep, while aux[PERL_MULTICONCAT_IX_UTF8_PV/LEN] | |
644 | * holds the utf8 rep, and there are 2 sets of segment lengths, | |
645 | * with the utf8 set following after the plain set. | |
646 | * | |
647 | * On entry to this section the (pv,len) pairs in svpv_buf have the | |
648 | * following meanings: | |
649 | * (pv, len) a plain string | |
650 | * (pv, -len) a utf8 string | |
651 | * (NULL, 0) left-most targ \ linked together R-to-L | |
652 | * (next, 0) other targ / in targ_chain | |
653 | */ | |
654 | ||
655 | /* turn off utf8 handling if 'use bytes' is in scope */ | |
656 | if (UNLIKELY(dst_utf8 && IN_BYTES)) { | |
657 | dst_utf8 = 0; | |
057ba76a | 658 | SvUTF8_off(targ); |
e839e6ed DM |
659 | /* undo all the negative lengths which flag utf8-ness */ |
660 | for (svpv_p = svpv_buf; svpv_p < svpv_end; svpv_p++) { | |
661 | SSize_t len = svpv_p->len; | |
662 | if (len < 0) | |
663 | svpv_p->len = -len; | |
664 | } | |
665 | } | |
666 | ||
667 | /* grow += total of lengths of constant string segments */ | |
668 | { | |
669 | SSize_t len; | |
670 | len = aux[dst_utf8 ? PERL_MULTICONCAT_IX_UTF8_LEN | |
b5bf9f73 | 671 | : PERL_MULTICONCAT_IX_PLAIN_LEN].ssize; |
e839e6ed DM |
672 | slow_concat = cBOOL(len); |
673 | grow += len; | |
674 | } | |
675 | ||
676 | const_lens = aux + PERL_MULTICONCAT_IX_LENGTHS; | |
677 | ||
678 | if (dst_utf8) { | |
679 | const_pv = aux[PERL_MULTICONCAT_IX_UTF8_PV].pv; | |
680 | if ( aux[PERL_MULTICONCAT_IX_PLAIN_PV].pv | |
681 | && const_pv != aux[PERL_MULTICONCAT_IX_PLAIN_PV].pv) | |
682 | /* separate sets of lengths for plain and utf8 */ | |
683 | const_lens += nargs + 1; | |
684 | ||
685 | /* If the result is utf8 but some of the args aren't, | |
686 | * calculate how much extra growth is needed for all the chars | |
687 | * which will expand to two utf8 bytes. | |
688 | * Also, if the growth is non-zero, negate the length to indicate | |
689 | * that this this is a variant string. Conversely, un-negate the | |
690 | * length on utf8 args (which was only needed to flag non-utf8 | |
691 | * args in this loop */ | |
692 | for (svpv_p = svpv_buf; svpv_p < svpv_end; svpv_p++) { | |
7d5ed5d0 | 693 | SSize_t len, extra; |
e839e6ed DM |
694 | |
695 | len = svpv_p->len; | |
696 | if (len <= 0) { | |
697 | svpv_p->len = -len; | |
698 | continue; | |
699 | } | |
700 | ||
7d5ed5d0 KW |
701 | extra = variant_under_utf8_count((U8 *) svpv_p->pv, |
702 | (U8 *) svpv_p->pv + len); | |
e839e6ed DM |
703 | if (UNLIKELY(extra)) { |
704 | grow += extra; | |
705 | /* -ve len indicates special handling */ | |
706 | svpv_p->len = -(len + extra); | |
707 | slow_concat = TRUE; | |
708 | } | |
709 | } | |
710 | } | |
711 | else | |
712 | const_pv = aux[PERL_MULTICONCAT_IX_PLAIN_PV].pv; | |
713 | ||
714 | /* unrolled SvGROW(), except don't check for SVf_IsCOW, which should | |
715 | * already have been dropped */ | |
057ba76a DM |
716 | assert(!SvIsCOW(targ)); |
717 | targ_pv = (SvLEN(targ) < (grow) ? sv_grow(targ,grow) : SvPVX(targ)); | |
e839e6ed DM |
718 | |
719 | ||
720 | /* -------------------------------------------------------------- | |
721 | * Phase 4: | |
722 | * | |
057ba76a DM |
723 | * Now that targ has been grown, we know the final address of the targ |
724 | * PVX, if needed. Preserve / move targ contents if appending or if | |
725 | * targ appears on RHS. | |
e839e6ed DM |
726 | * |
727 | * Also update svpv_buf slots in targ_chain. | |
728 | * | |
729 | * Don't bother with any of this if the target length is zero: | |
730 | * targ_len is set to zero unless we're appending or targ appears on | |
731 | * RHS. And even if it is, we can optimise by skipping this chunk of | |
732 | * code for zero targ_len. In the latter case, we don't need to update | |
733 | * the slots in targ_chain with the (zero length) target string, since | |
734 | * we set the len in such slots to 0 earlier, and since the Copy() is | |
735 | * skipped on zero length, it doesn't matter what svpv_p->pv contains. | |
736 | * | |
737 | * On entry to this section the (pv,len) pairs in svpv_buf have the | |
738 | * following meanings: | |
739 | * (pv, len) a pure-plain or utf8 string | |
740 | * (pv, -(len+extra)) a plain string which will expand by 'extra' | |
741 | * bytes when converted to utf8 | |
742 | * (NULL, 0) left-most targ \ linked together R-to-L | |
743 | * (next, 0) other targ / in targ_chain | |
744 | * | |
745 | * On exit, the targ contents will have been moved to the | |
746 | * earliest place they are needed (e.g. $x = "abc$x" will shift them | |
747 | * 3 bytes, while $x .= ... will leave them at the beginning); | |
057ba76a | 748 | * and dst_pv will point to the location within SvPVX(targ) where the |
e839e6ed DM |
749 | * next arg should be copied. |
750 | */ | |
751 | ||
752 | svpv_base = svpv_buf; | |
753 | ||
754 | if (targ_len) { | |
755 | struct multiconcat_svpv *tc_stop; | |
057ba76a | 756 | char *targ_buf = targ_pv; /* ptr to original targ string */ |
e839e6ed | 757 | |
e839e6ed DM |
758 | assert(is_append || targ_count); |
759 | ||
760 | if (is_append) { | |
057ba76a | 761 | targ_pv += targ_len; |
e839e6ed DM |
762 | tc_stop = NULL; |
763 | } | |
764 | else { | |
765 | /* The targ appears on RHS, e.g. '$t = $a . $t . $t'. | |
766 | * Move the current contents of targ to the first | |
767 | * position where it's needed, and use that as the src buffer | |
768 | * for any further uses (such as the second RHS $t above). | |
769 | * In calculating the first position, we need to sum the | |
770 | * lengths of all consts and args before that. | |
771 | */ | |
772 | ||
773 | UNOP_AUX_item *lens = const_lens; | |
774 | /* length of first const string segment */ | |
b5bf9f73 | 775 | STRLEN offset = lens->ssize > 0 ? lens->ssize : 0; |
e839e6ed DM |
776 | |
777 | assert(targ_chain); | |
778 | svpv_p = svpv_base; | |
779 | ||
780 | for (;;) { | |
781 | SSize_t len; | |
782 | if (!svpv_p->pv) | |
783 | break; /* the first targ argument */ | |
784 | /* add lengths of the next arg and const string segment */ | |
785 | len = svpv_p->len; | |
786 | if (len < 0) /* variant args have this */ | |
787 | len = -len; | |
788 | offset += (STRLEN)len; | |
b5bf9f73 | 789 | len = (++lens)->ssize; |
e839e6ed DM |
790 | offset += (len >= 0) ? (STRLEN)len : 0; |
791 | if (!offset) { | |
792 | /* all args and consts so far are empty; update | |
793 | * the start position for the concat later */ | |
794 | svpv_base++; | |
795 | const_lens++; | |
796 | } | |
797 | svpv_p++; | |
798 | assert(svpv_p < svpv_end); | |
799 | } | |
800 | ||
801 | if (offset) { | |
057ba76a DM |
802 | targ_buf += offset; |
803 | Move(targ_pv, targ_buf, targ_len, char); | |
e839e6ed | 804 | /* a negative length implies don't Copy(), but do increment */ |
90b21a3e | 805 | svpv_p->len = -((SSize_t)targ_len); |
e839e6ed DM |
806 | slow_concat = TRUE; |
807 | } | |
808 | else { | |
809 | /* skip the first targ copy */ | |
810 | svpv_base++; | |
811 | const_lens++; | |
057ba76a | 812 | targ_pv += targ_len; |
e839e6ed DM |
813 | } |
814 | ||
815 | /* Don't populate the first targ slot in the loop below; it's | |
816 | * either not used because we advanced svpv_base beyond it, or | |
817 | * we already stored the special -targ_len value in it | |
818 | */ | |
819 | tc_stop = svpv_p; | |
820 | } | |
821 | ||
822 | /* populate slots in svpv_buf representing targ on RHS */ | |
823 | while (targ_chain != tc_stop) { | |
824 | struct multiconcat_svpv *p = targ_chain; | |
825 | targ_chain = (struct multiconcat_svpv *)(p->pv); | |
057ba76a | 826 | p->pv = targ_buf; |
e839e6ed DM |
827 | p->len = (SSize_t)targ_len; |
828 | } | |
829 | } | |
830 | ||
831 | ||
832 | /* -------------------------------------------------------------- | |
833 | * Phase 5: | |
834 | * | |
057ba76a | 835 | * Append all the args in svpv_buf, plus the const strings, to targ. |
e839e6ed DM |
836 | * |
837 | * On entry to this section the (pv,len) pairs in svpv_buf have the | |
838 | * following meanings: | |
839 | * (pv, len) a pure-plain or utf8 string (which may be targ) | |
840 | * (pv, -(len+extra)) a plain string which will expand by 'extra' | |
841 | * bytes when converted to utf8 | |
842 | * (0, -len) left-most targ, whose content has already | |
057ba76a | 843 | * been copied. Just advance targ_pv by len. |
e839e6ed DM |
844 | */ |
845 | ||
846 | /* If there are no constant strings and no special case args | |
847 | * (svpv_p->len < 0), use a simpler, more efficient concat loop | |
848 | */ | |
849 | if (!slow_concat) { | |
850 | for (svpv_p = svpv_base; svpv_p < svpv_end; svpv_p++) { | |
851 | SSize_t len = svpv_p->len; | |
852 | if (!len) | |
853 | continue; | |
057ba76a DM |
854 | Copy(svpv_p->pv, targ_pv, len, char); |
855 | targ_pv += len; | |
e839e6ed DM |
856 | } |
857 | const_lens += (svpv_end - svpv_base + 1); | |
858 | } | |
859 | else { | |
860 | /* Note that we iterate the loop nargs+1 times: to append nargs | |
861 | * arguments and nargs+1 constant strings. For example, "-$a-$b-" | |
862 | */ | |
863 | svpv_p = svpv_base - 1; | |
864 | ||
865 | for (;;) { | |
b5bf9f73 | 866 | SSize_t len = (const_lens++)->ssize; |
e839e6ed DM |
867 | |
868 | /* append next const string segment */ | |
869 | if (len > 0) { | |
057ba76a DM |
870 | Copy(const_pv, targ_pv, len, char); |
871 | targ_pv += len; | |
e839e6ed DM |
872 | const_pv += len; |
873 | } | |
874 | ||
875 | if (++svpv_p == svpv_end) | |
876 | break; | |
877 | ||
878 | /* append next arg */ | |
879 | len = svpv_p->len; | |
880 | ||
881 | if (LIKELY(len > 0)) { | |
057ba76a DM |
882 | Copy(svpv_p->pv, targ_pv, len, char); |
883 | targ_pv += len; | |
e839e6ed DM |
884 | } |
885 | else if (UNLIKELY(len < 0)) { | |
886 | /* negative length indicates two special cases */ | |
887 | const char *p = svpv_p->pv; | |
888 | len = -len; | |
889 | if (UNLIKELY(p)) { | |
890 | /* copy plain-but-variant pv to a utf8 targ */ | |
057ba76a | 891 | char * end_pv = targ_pv + len; |
e839e6ed | 892 | assert(dst_utf8); |
057ba76a | 893 | while (targ_pv < end_pv) { |
e839e6ed | 894 | U8 c = (U8) *p++; |
057ba76a | 895 | append_utf8_from_native_byte(c, (U8**)&targ_pv); |
e839e6ed DM |
896 | } |
897 | } | |
898 | else | |
899 | /* arg is already-copied targ */ | |
057ba76a | 900 | targ_pv += len; |
e839e6ed DM |
901 | } |
902 | ||
903 | } | |
904 | } | |
905 | ||
057ba76a DM |
906 | *targ_pv = '\0'; |
907 | SvCUR_set(targ, targ_pv - SvPVX(targ)); | |
908 | assert(grow >= SvCUR(targ) + 1); | |
909 | assert(SvLEN(targ) >= SvCUR(targ) + 1); | |
e839e6ed DM |
910 | |
911 | /* -------------------------------------------------------------- | |
912 | * Phase 6: | |
913 | * | |
af390142 | 914 | * return result |
e839e6ed DM |
915 | */ |
916 | ||
af390142 DM |
917 | SP -= stack_adj; |
918 | SvTAINT(targ); | |
919 | SETTARG; | |
920 | RETURN; | |
e839e6ed | 921 | |
af390142 DM |
922 | /* -------------------------------------------------------------- |
923 | * Phase 7: | |
924 | * | |
925 | * We only get here if any of the args (or targ too in the case of | |
926 | * append) have something which might cause side effects, such | |
927 | * as magic, overload, or an undef value in the presence of warnings. | |
928 | * In that case, any earlier attempt to stringify the args will have | |
929 | * been abandoned, and we come here instead. | |
930 | * | |
931 | * Here, we concat each arg in turn the old-fashioned way: essentially | |
932 | * emulating pp_concat() in a loop. This means that all the weird edge | |
933 | * cases will be handled correctly, if not necessarily speedily. | |
934 | * | |
935 | * Note that some args may already have been stringified - those are | |
936 | * processed again, which is safe, since only args without side-effects | |
937 | * were stringified earlier. | |
938 | */ | |
939 | ||
940 | do_magical: | |
941 | { | |
942 | SSize_t i, n; | |
943 | SV *left = NULL; | |
944 | SV *right; | |
945 | SV* nexttarg; | |
946 | bool nextappend; | |
947 | U32 utf8 = 0; | |
948 | SV **svp; | |
949 | const char *cpv = aux[PERL_MULTICONCAT_IX_PLAIN_PV].pv; | |
950 | UNOP_AUX_item *lens = aux + PERL_MULTICONCAT_IX_LENGTHS; | |
55b62dee | 951 | Size_t arg_count = 0; /* how many args have been processed */ |
af390142 DM |
952 | |
953 | if (!cpv) { | |
954 | cpv = aux[PERL_MULTICONCAT_IX_UTF8_PV].pv; | |
955 | utf8 = SVf_UTF8; | |
956 | } | |
957 | ||
958 | svp = toparg - nargs + 1; | |
959 | ||
960 | /* iterate for: | |
961 | * nargs arguments, | |
962 | * plus possible nargs+1 consts, | |
963 | * plus, if appending, a final targ in an extra last iteration | |
964 | */ | |
965 | ||
966 | n = nargs *2 + 1; | |
55b62dee DM |
967 | for (i = 0; i <= n; i++) { |
968 | SSize_t len; | |
969 | ||
970 | /* if necessary, stringify the final RHS result in | |
971 | * something like $targ .= "$a$b$c" - simulating | |
972 | * pp_stringify | |
973 | */ | |
974 | if ( i == n | |
975 | && (PL_op->op_private &OPpMULTICONCAT_STRINGIFY) | |
976 | && !(SvPOK(left)) | |
977 | /* extra conditions for backwards compatibility: | |
978 | * probably incorrect, but keep the existing behaviour | |
979 | * for now. The rules are: | |
980 | * $x = "$ov" single arg: stringify; | |
981 | * $x = "$ov$y" multiple args: don't stringify, | |
982 | * $lex = "$ov$y$z" except TARGMY with at least 2 concats | |
983 | */ | |
984 | && ( arg_count == 1 | |
985 | || ( arg_count >= 3 | |
986 | && !is_append | |
987 | && (PL_op->op_private & OPpTARGET_MY) | |
988 | && !(PL_op->op_private & OPpLVAL_INTRO) | |
989 | ) | |
990 | ) | |
991 | ) | |
992 | { | |
993 | SV *tmp = sv_newmortal(); | |
994 | sv_copypv(tmp, left); | |
995 | SvSETMAGIC(tmp); | |
996 | left = tmp; | |
997 | } | |
998 | ||
999 | /* do one extra iteration to handle $targ in $targ .= ... */ | |
1000 | if (i == n && !is_append) | |
1001 | break; | |
1002 | ||
af390142 | 1003 | /* get the next arg SV or regen the next const SV */ |
55b62dee | 1004 | len = lens[i >> 1].ssize; |
af390142 DM |
1005 | if (i == n) { |
1006 | /* handle the final targ .= (....) */ | |
1007 | right = left; | |
1008 | left = targ; | |
1009 | } | |
1010 | else if (i & 1) | |
1011 | right = svp[(i >> 1)]; | |
1012 | else if (len < 0) | |
1013 | continue; /* no const in this position */ | |
1014 | else { | |
1015 | right = newSVpvn_flags(cpv, len, (utf8 | SVs_TEMP)); | |
1016 | cpv += len; | |
1017 | } | |
e839e6ed | 1018 | |
55b62dee DM |
1019 | arg_count++; |
1020 | ||
1021 | if (arg_count <= 1) { | |
af390142 DM |
1022 | left = right; |
1023 | continue; /* need at least two SVs to concat together */ | |
1024 | } | |
1025 | ||
55b62dee | 1026 | if (arg_count == 2 && i < n) { |
af390142 DM |
1027 | /* for the first concat, create a mortal acting like the |
1028 | * padtmp from OP_CONST. In later iterations this will | |
1029 | * be appended to */ | |
1030 | nexttarg = sv_newmortal(); | |
1031 | nextappend = FALSE; | |
af390142 DM |
1032 | } |
1033 | else { | |
1034 | nexttarg = left; | |
1035 | nextappend = TRUE; | |
1036 | } | |
1037 | ||
1038 | /* Handle possible overloading. | |
1039 | * This is basically an unrolled | |
1040 | * tryAMAGICbin_MG(concat_amg, AMGf_assign); | |
1041 | * and | |
1042 | * Perl_try_amagic_bin() | |
1043 | * call, but using left and right rather than SP[-1], SP[0], | |
1044 | * and not relying on OPf_STACKED implying .= | |
e839e6ed | 1045 | */ |
e839e6ed | 1046 | |
af390142 DM |
1047 | if ((SvFLAGS(left)|SvFLAGS(right)) & (SVf_ROK|SVs_GMG)) { |
1048 | SvGETMAGIC(left); | |
1049 | if (left != right) | |
1050 | SvGETMAGIC(right); | |
1051 | ||
1052 | if ((SvAMAGIC(left) || SvAMAGIC(right)) | |
1053 | /* sprintf doesn't do concat overloading, | |
1054 | * but allow for $x .= sprintf(...) | |
1055 | */ | |
1056 | && ( !(PL_op->op_private & OPpMULTICONCAT_FAKE) | |
1057 | || i == n) | |
e839e6ed | 1058 | ) |
af390142 DM |
1059 | { |
1060 | SV * const tmpsv = amagic_call(left, right, concat_amg, | |
1061 | (nextappend ? AMGf_assign: 0)); | |
1062 | if (tmpsv) { | |
7554d344 DM |
1063 | /* NB: tryAMAGICbin_MG() includes an OPpTARGET_MY test |
1064 | * here, which isn't needed as any implicit | |
1065 | * assign done under OPpTARGET_MY is done after | |
af390142 DM |
1066 | * this loop */ |
1067 | if (nextappend) { | |
1068 | sv_setsv(left, tmpsv); | |
1069 | SvSETMAGIC(left); | |
e839e6ed | 1070 | } |
af390142 DM |
1071 | else |
1072 | left = tmpsv; | |
1073 | continue; | |
1074 | } | |
1075 | } | |
1076 | ||
1077 | /* if both args are the same magical value, make one a copy */ | |
1078 | if (left == right && SvGMAGICAL(left)) { | |
1079 | left = sv_newmortal(); | |
1080 | /* Print the uninitialized warning now, so it includes the | |
1081 | * variable name. */ | |
1082 | if (!SvOK(right)) { | |
1083 | if (ckWARN(WARN_UNINITIALIZED)) | |
1084 | report_uninit(right); | |
1085 | sv_setsv_flags(left, &PL_sv_no, 0); | |
e839e6ed | 1086 | } |
af390142 DM |
1087 | else |
1088 | sv_setsv_flags(left, right, 0); | |
1089 | SvGETMAGIC(right); | |
e839e6ed DM |
1090 | } |
1091 | } | |
e839e6ed | 1092 | |
af390142 DM |
1093 | /* nexttarg = left . right */ |
1094 | S_do_concat(aTHX_ left, right, nexttarg, 0); | |
1095 | left = nexttarg; | |
e839e6ed | 1096 | } |
e839e6ed | 1097 | |
af390142 | 1098 | SP = toparg - stack_adj + 1; |
e839e6ed | 1099 | |
4e521aaf DM |
1100 | /* Return the result of all RHS concats, unless this op includes |
1101 | * an assign ($lex = x.y.z or expr = x.y.z), in which case copy | |
1102 | * to target (which will be $lex or expr). | |
af390142 DM |
1103 | * If we are appending, targ will already have been appended to in |
1104 | * the loop */ | |
4e521aaf DM |
1105 | if ( !is_append |
1106 | && ( (PL_op->op_flags & OPf_STACKED) | |
1107 | || (PL_op->op_private & OPpTARGET_MY)) | |
1108 | ) { | |
af390142 DM |
1109 | sv_setsv(targ, left); |
1110 | SvSETMAGIC(targ); | |
1111 | } | |
4e521aaf DM |
1112 | else |
1113 | targ = left; | |
af390142 DM |
1114 | SETs(targ); |
1115 | RETURN; | |
1116 | } | |
e839e6ed DM |
1117 | } |
1118 | ||
1119 | ||
0b5aba47 DM |
1120 | /* push the elements of av onto the stack. |
1121 | * Returns PL_op->op_next to allow tail-call optimisation of its callers */ | |
d5524600 | 1122 | |
0b5aba47 | 1123 | STATIC OP* |
d5524600 DM |
1124 | S_pushav(pTHX_ AV* const av) |
1125 | { | |
1126 | dSP; | |
c70927a6 | 1127 | const SSize_t maxarg = AvFILL(av) + 1; |
d5524600 | 1128 | EXTEND(SP, maxarg); |
5d9574c1 | 1129 | if (UNLIKELY(SvRMAGICAL(av))) { |
c70927a6 FC |
1130 | PADOFFSET i; |
1131 | for (i=0; i < (PADOFFSET)maxarg; i++) { | |
fd77b29b FC |
1132 | SV ** const svp = av_fetch(av, i, FALSE); |
1133 | SP[i+1] = LIKELY(svp) | |
1134 | ? *svp | |
1135 | : UNLIKELY(PL_op->op_flags & OPf_MOD) | |
1f1dcfb5 | 1136 | ? av_nonelem(av,i) |
fd77b29b | 1137 | : &PL_sv_undef; |
d5524600 DM |
1138 | } |
1139 | } | |
1140 | else { | |
c70927a6 FC |
1141 | PADOFFSET i; |
1142 | for (i=0; i < (PADOFFSET)maxarg; i++) { | |
6661956a | 1143 | SV *sv = AvARRAY(av)[i]; |
fd77b29b FC |
1144 | SP[i+1] = LIKELY(sv) |
1145 | ? sv | |
1146 | : UNLIKELY(PL_op->op_flags & OPf_MOD) | |
1f1dcfb5 | 1147 | ? av_nonelem(av,i) |
fd77b29b | 1148 | : &PL_sv_undef; |
ce0d59fd | 1149 | } |
d5524600 DM |
1150 | } |
1151 | SP += maxarg; | |
1152 | PUTBACK; | |
0b5aba47 | 1153 | return NORMAL; |
d5524600 DM |
1154 | } |
1155 | ||
1156 | ||
a7fd8ef6 DM |
1157 | /* ($lex1,@lex2,...) or my ($lex1,@lex2,...) */ |
1158 | ||
1159 | PP(pp_padrange) | |
1160 | { | |
20b7effb | 1161 | dSP; |
a7fd8ef6 DM |
1162 | PADOFFSET base = PL_op->op_targ; |
1163 | int count = (int)(PL_op->op_private) & OPpPADRANGE_COUNTMASK; | |
d5524600 DM |
1164 | if (PL_op->op_flags & OPf_SPECIAL) { |
1165 | /* fake the RHS of my ($x,$y,..) = @_ */ | |
1166 | PUSHMARK(SP); | |
0b5aba47 | 1167 | (void)S_pushav(aTHX_ GvAVn(PL_defgv)); |
d5524600 DM |
1168 | SPAGAIN; |
1169 | } | |
1170 | ||
a7fd8ef6 DM |
1171 | /* note, this is only skipped for compile-time-known void cxt */ |
1172 | if ((PL_op->op_flags & OPf_WANT) != OPf_WANT_VOID) { | |
19742f39 AL |
1173 | int i; |
1174 | ||
a7fd8ef6 DM |
1175 | EXTEND(SP, count); |
1176 | PUSHMARK(SP); | |
1177 | for (i = 0; i <count; i++) | |
1178 | *++SP = PAD_SV(base+i); | |
1179 | } | |
1180 | if (PL_op->op_private & OPpLVAL_INTRO) { | |
4e09461c DM |
1181 | SV **svp = &(PAD_SVl(base)); |
1182 | const UV payload = (UV)( | |
1183 | (base << (OPpPADRANGE_COUNTSHIFT + SAVE_TIGHT_SHIFT)) | |
1184 | | (count << SAVE_TIGHT_SHIFT) | |
1185 | | SAVEt_CLEARPADRANGE); | |
19742f39 AL |
1186 | int i; |
1187 | ||
6d59e610 | 1188 | STATIC_ASSERT_STMT(OPpPADRANGE_COUNTMASK + 1 == (1 << OPpPADRANGE_COUNTSHIFT)); |
d081a355 DM |
1189 | assert((payload >> (OPpPADRANGE_COUNTSHIFT+SAVE_TIGHT_SHIFT)) |
1190 | == (Size_t)base); | |
a3444cc5 DM |
1191 | { |
1192 | dSS_ADD; | |
1193 | SS_ADD_UV(payload); | |
1194 | SS_ADD_END(1); | |
1195 | } | |
4e09461c | 1196 | |
a7fd8ef6 | 1197 | for (i = 0; i <count; i++) |
4e09461c | 1198 | SvPADSTALE_off(*svp++); /* mark lexical as active */ |
a7fd8ef6 DM |
1199 | } |
1200 | RETURN; | |
1201 | } | |
1202 | ||
1203 | ||
a0d0e21e LW |
1204 | PP(pp_padsv) |
1205 | { | |
20b7effb | 1206 | dSP; |
6c28b496 DD |
1207 | EXTEND(SP, 1); |
1208 | { | |
1209 | OP * const op = PL_op; | |
1210 | /* access PL_curpad once */ | |
1211 | SV ** const padentry = &(PAD_SVl(op->op_targ)); | |
1212 | { | |
1213 | dTARG; | |
1214 | TARG = *padentry; | |
1215 | PUSHs(TARG); | |
1216 | PUTBACK; /* no pop/push after this, TOPs ok */ | |
8ec5e241 | 1217 | } |
6c28b496 DD |
1218 | if (op->op_flags & OPf_MOD) { |
1219 | if (op->op_private & OPpLVAL_INTRO) | |
1220 | if (!(op->op_private & OPpPAD_STATE)) | |
1221 | save_clearsv(padentry); | |
1222 | if (op->op_private & OPpDEREF) { | |
8f90a16d FC |
1223 | /* TOPs is equivalent to TARG here. Using TOPs (SP) rather |
1224 | than TARG reduces the scope of TARG, so it does not | |
1225 | span the call to save_clearsv, resulting in smaller | |
1226 | machine code. */ | |
6c28b496 DD |
1227 | TOPs = vivify_ref(TOPs, op->op_private & OPpDEREF); |
1228 | } | |
1229 | } | |
1230 | return op->op_next; | |
4633a7c4 | 1231 | } |
a0d0e21e LW |
1232 | } |
1233 | ||
1234 | PP(pp_readline) | |
1235 | { | |
30901a8a | 1236 | dSP; |
12dc5f94 DM |
1237 | /* pp_coreargs pushes a NULL to indicate no args passed to |
1238 | * CORE::readline() */ | |
30901a8a FC |
1239 | if (TOPs) { |
1240 | SvGETMAGIC(TOPs); | |
fc99edcf | 1241 | tryAMAGICunTARGETlist(iter_amg, 0); |
30901a8a FC |
1242 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
1243 | } | |
1244 | else PL_last_in_gv = PL_argvgv, PL_stack_sp--; | |
6e592b3a BM |
1245 | if (!isGV_with_GP(PL_last_in_gv)) { |
1246 | if (SvROK(PL_last_in_gv) && isGV_with_GP(SvRV(PL_last_in_gv))) | |
159b6efe | 1247 | PL_last_in_gv = MUTABLE_GV(SvRV(PL_last_in_gv)); |
8efb3254 | 1248 | else { |
f5284f61 | 1249 | dSP; |
ad64d0ec | 1250 | XPUSHs(MUTABLE_SV(PL_last_in_gv)); |
f5284f61 | 1251 | PUTBACK; |
897d3989 | 1252 | Perl_pp_rv2gv(aTHX); |
159b6efe | 1253 | PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--); |
745e740c | 1254 | assert((SV*)PL_last_in_gv == &PL_sv_undef || isGV_with_GP(PL_last_in_gv)); |
f5284f61 IZ |
1255 | } |
1256 | } | |
a0d0e21e LW |
1257 | return do_readline(); |
1258 | } | |
1259 | ||
1260 | PP(pp_eq) | |
1261 | { | |
20b7effb | 1262 | dSP; |
33efebe6 DM |
1263 | SV *left, *right; |
1264 | ||
0872de45 | 1265 | tryAMAGICbin_MG(eq_amg, AMGf_numeric); |
33efebe6 DM |
1266 | right = POPs; |
1267 | left = TOPs; | |
1268 | SETs(boolSV( | |
1269 | (SvIOK_notUV(left) && SvIOK_notUV(right)) | |
1270 | ? (SvIVX(left) == SvIVX(right)) | |
1271 | : ( do_ncmp(left, right) == 0) | |
1272 | )); | |
1273 | RETURN; | |
a0d0e21e LW |
1274 | } |
1275 | ||
b1c05ba5 | 1276 | |
4c2c3128 | 1277 | /* also used for: pp_i_preinc() */ |
b1c05ba5 | 1278 | |
a0d0e21e LW |
1279 | PP(pp_preinc) |
1280 | { | |
4c2c3128 DM |
1281 | SV *sv = *PL_stack_sp; |
1282 | ||
1283 | if (LIKELY(((sv->sv_flags & | |
1284 | (SVf_THINKFIRST|SVs_GMG|SVf_IVisUV| | |
1285 | SVf_IOK|SVf_NOK|SVf_POK|SVp_NOK|SVp_POK|SVf_ROK)) | |
1286 | == SVf_IOK)) | |
1287 | && SvIVX(sv) != IV_MAX) | |
1288 | { | |
1289 | SvIV_set(sv, SvIVX(sv) + 1); | |
1290 | } | |
1291 | else /* Do all the PERL_PRESERVE_IVUV and hard cases in sv_inc */ | |
1292 | sv_inc(sv); | |
1293 | SvSETMAGIC(sv); | |
1294 | return NORMAL; | |
1295 | } | |
1296 | ||
1297 | ||
1298 | /* also used for: pp_i_predec() */ | |
1299 | ||
1300 | PP(pp_predec) | |
1301 | { | |
1302 | SV *sv = *PL_stack_sp; | |
1303 | ||
1304 | if (LIKELY(((sv->sv_flags & | |
1305 | (SVf_THINKFIRST|SVs_GMG|SVf_IVisUV| | |
1306 | SVf_IOK|SVf_NOK|SVf_POK|SVp_NOK|SVp_POK|SVf_ROK)) | |
1307 | == SVf_IOK)) | |
1308 | && SvIVX(sv) != IV_MIN) | |
55497cff | 1309 | { |
4c2c3128 | 1310 | SvIV_set(sv, SvIVX(sv) - 1); |
748a9306 | 1311 | } |
4c2c3128 DM |
1312 | else /* Do all the PERL_PRESERVE_IVUV and hard cases in sv_dec */ |
1313 | sv_dec(sv); | |
1314 | SvSETMAGIC(sv); | |
a0d0e21e LW |
1315 | return NORMAL; |
1316 | } | |
1317 | ||
b1c05ba5 DM |
1318 | |
1319 | /* also used for: pp_orassign() */ | |
1320 | ||
a0d0e21e LW |
1321 | PP(pp_or) |
1322 | { | |
20b7effb | 1323 | dSP; |
f4c975aa | 1324 | SV *sv; |
f410a211 | 1325 | PERL_ASYNC_CHECK(); |
f4c975aa DM |
1326 | sv = TOPs; |
1327 | if (SvTRUE_NN(sv)) | |
a0d0e21e LW |
1328 | RETURN; |
1329 | else { | |
c960fc3b SP |
1330 | if (PL_op->op_type == OP_OR) |
1331 | --SP; | |
a0d0e21e LW |
1332 | RETURNOP(cLOGOP->op_other); |
1333 | } | |
1334 | } | |
1335 | ||
b1c05ba5 DM |
1336 | |
1337 | /* also used for: pp_dor() pp_dorassign() */ | |
1338 | ||
25a55bd7 | 1339 | PP(pp_defined) |
c963b151 | 1340 | { |
20b7effb | 1341 | dSP; |
eb578fdb | 1342 | SV* sv; |
6136c704 | 1343 | bool defined; |
25a55bd7 | 1344 | const int op_type = PL_op->op_type; |
ea5195b7 | 1345 | const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN); |
c963b151 | 1346 | |
6136c704 | 1347 | if (is_dor) { |
f410a211 | 1348 | PERL_ASYNC_CHECK(); |
25a55bd7 | 1349 | sv = TOPs; |
5d9574c1 | 1350 | if (UNLIKELY(!sv || !SvANY(sv))) { |
2bd49cfc NC |
1351 | if (op_type == OP_DOR) |
1352 | --SP; | |
25a55bd7 SP |
1353 | RETURNOP(cLOGOP->op_other); |
1354 | } | |
b7c44293 RGS |
1355 | } |
1356 | else { | |
1357 | /* OP_DEFINED */ | |
25a55bd7 | 1358 | sv = POPs; |
5d9574c1 | 1359 | if (UNLIKELY(!sv || !SvANY(sv))) |
25a55bd7 | 1360 | RETPUSHNO; |
b7c44293 | 1361 | } |
25a55bd7 | 1362 | |
6136c704 | 1363 | defined = FALSE; |
c963b151 BD |
1364 | switch (SvTYPE(sv)) { |
1365 | case SVt_PVAV: | |
1366 | if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
25a55bd7 | 1367 | defined = TRUE; |
c963b151 BD |
1368 | break; |
1369 | case SVt_PVHV: | |
1370 | if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied))) | |
25a55bd7 | 1371 | defined = TRUE; |
c963b151 BD |
1372 | break; |
1373 | case SVt_PVCV: | |
1374 | if (CvROOT(sv) || CvXSUB(sv)) | |
25a55bd7 | 1375 | defined = TRUE; |
c963b151 BD |
1376 | break; |
1377 | default: | |
5b295bef | 1378 | SvGETMAGIC(sv); |
c963b151 | 1379 | if (SvOK(sv)) |
25a55bd7 | 1380 | defined = TRUE; |
6136c704 | 1381 | break; |
c963b151 | 1382 | } |
6136c704 AL |
1383 | |
1384 | if (is_dor) { | |
c960fc3b SP |
1385 | if(defined) |
1386 | RETURN; | |
1387 | if(op_type == OP_DOR) | |
1388 | --SP; | |
25a55bd7 | 1389 | RETURNOP(cLOGOP->op_other); |
25a55bd7 | 1390 | } |
d9aa96a4 SP |
1391 | /* assuming OP_DEFINED */ |
1392 | if(defined) | |
1393 | RETPUSHYES; | |
1394 | RETPUSHNO; | |
c963b151 BD |
1395 | } |
1396 | ||
230ee21f DM |
1397 | |
1398 | ||
a0d0e21e LW |
1399 | PP(pp_add) |
1400 | { | |
20b7effb | 1401 | dSP; dATARGET; bool useleft; SV *svl, *svr; |
230ee21f | 1402 | |
6f1401dc DM |
1403 | tryAMAGICbin_MG(add_amg, AMGf_assign|AMGf_numeric); |
1404 | svr = TOPs; | |
1405 | svl = TOPm1s; | |
1406 | ||
28e5dec8 | 1407 | #ifdef PERL_PRESERVE_IVUV |
230ee21f DM |
1408 | |
1409 | /* special-case some simple common cases */ | |
1410 | if (!((svl->sv_flags|svr->sv_flags) & (SVf_IVisUV|SVs_GMG))) { | |
1411 | IV il, ir; | |
1412 | U32 flags = (svl->sv_flags & svr->sv_flags); | |
1413 | if (flags & SVf_IOK) { | |
1414 | /* both args are simple IVs */ | |
1415 | UV topl, topr; | |
1416 | il = SvIVX(svl); | |
1417 | ir = SvIVX(svr); | |
1418 | do_iv: | |
1419 | topl = ((UV)il) >> (UVSIZE * 8 - 2); | |
1420 | topr = ((UV)ir) >> (UVSIZE * 8 - 2); | |
1421 | ||
1422 | /* if both are in a range that can't under/overflow, do a | |
1423 | * simple integer add: if the top of both numbers | |
1424 | * are 00 or 11, then it's safe */ | |
1425 | if (!( ((topl+1) | (topr+1)) & 2)) { | |
1426 | SP--; | |
1427 | TARGi(il + ir, 0); /* args not GMG, so can't be tainted */ | |
1428 | SETs(TARG); | |
1429 | RETURN; | |
1430 | } | |
1431 | goto generic; | |
1432 | } | |
1433 | else if (flags & SVf_NOK) { | |
1434 | /* both args are NVs */ | |
1435 | NV nl = SvNVX(svl); | |
1436 | NV nr = SvNVX(svr); | |
1437 | ||
3a019afd | 1438 | if (lossless_NV_to_IV(nl, &il) && lossless_NV_to_IV(nr, &ir)) { |
230ee21f DM |
1439 | /* nothing was lost by converting to IVs */ |
1440 | goto do_iv; | |
3a019afd | 1441 | } |
230ee21f DM |
1442 | SP--; |
1443 | TARGn(nl + nr, 0); /* args not GMG, so can't be tainted */ | |
1444 | SETs(TARG); | |
1445 | RETURN; | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | generic: | |
1450 | ||
1451 | useleft = USE_LEFT(svl); | |
28e5dec8 JH |
1452 | /* We must see if we can perform the addition with integers if possible, |
1453 | as the integer code detects overflow while the NV code doesn't. | |
1454 | If either argument hasn't had a numeric conversion yet attempt to get | |
1455 | the IV. It's important to do this now, rather than just assuming that | |
1456 | it's not IOK as a PV of "9223372036854775806" may not take well to NV | |
1457 | addition, and an SV which is NOK, NV=6.0 ought to be coerced to | |
1458 | integer in case the second argument is IV=9223372036854775806 | |
1459 | We can (now) rely on sv_2iv to do the right thing, only setting the | |
1460 | public IOK flag if the value in the NV (or PV) slot is truly integer. | |
1461 | ||
1462 | A side effect is that this also aggressively prefers integer maths over | |
7dca457a NC |
1463 | fp maths for integer values. |
1464 | ||
a00b5bd3 | 1465 | How to detect overflow? |
7dca457a NC |
1466 | |
1467 | C 99 section 6.2.6.1 says | |
1468 | ||
1469 | The range of nonnegative values of a signed integer type is a subrange | |
1470 | of the corresponding unsigned integer type, and the representation of | |
1471 | the same value in each type is the same. A computation involving | |
1472 | unsigned operands can never overflow, because a result that cannot be | |
1473 | represented by the resulting unsigned integer type is reduced modulo | |
1474 | the number that is one greater than the largest value that can be | |
1475 | represented by the resulting type. | |
1476 | ||
1477 | (the 9th paragraph) | |
1478 | ||
1479 | which I read as "unsigned ints wrap." | |
1480 | ||
1481 | signed integer overflow seems to be classed as "exception condition" | |
1482 | ||
1483 | If an exceptional condition occurs during the evaluation of an | |
1484 | expression (that is, if the result is not mathematically defined or not | |
1485 | in the range of representable values for its type), the behavior is | |
1486 | undefined. | |
1487 | ||
1488 | (6.5, the 5th paragraph) | |
1489 | ||
1490 | I had assumed that on 2s complement machines signed arithmetic would | |
1491 | wrap, hence coded pp_add and pp_subtract on the assumption that | |
1492 | everything perl builds on would be happy. After much wailing and | |
1493 | gnashing of teeth it would seem that irix64 knows its ANSI spec well, | |
1494 | knows that it doesn't need to, and doesn't. Bah. Anyway, the all- | |
1495 | unsigned code below is actually shorter than the old code. :-) | |
1496 | */ | |
1497 | ||
01f91bf2 | 1498 | if (SvIV_please_nomg(svr)) { |
28e5dec8 JH |
1499 | /* Unless the left argument is integer in range we are going to have to |
1500 | use NV maths. Hence only attempt to coerce the right argument if | |
1501 | we know the left is integer. */ | |
eb578fdb | 1502 | UV auv = 0; |
9c5ffd7c | 1503 | bool auvok = FALSE; |
7dca457a NC |
1504 | bool a_valid = 0; |
1505 | ||
28e5dec8 | 1506 | if (!useleft) { |
7dca457a NC |
1507 | auv = 0; |
1508 | a_valid = auvok = 1; | |
1509 | /* left operand is undef, treat as zero. + 0 is identity, | |
1510 | Could SETi or SETu right now, but space optimise by not adding | |
1511 | lots of code to speed up what is probably a rarish case. */ | |
1512 | } else { | |
1513 | /* Left operand is defined, so is it IV? */ | |
01f91bf2 | 1514 | if (SvIV_please_nomg(svl)) { |
800401ee JH |
1515 | if ((auvok = SvUOK(svl))) |
1516 | auv = SvUVX(svl); | |
7dca457a | 1517 | else { |
eb578fdb | 1518 | const IV aiv = SvIVX(svl); |
7dca457a NC |
1519 | if (aiv >= 0) { |
1520 | auv = aiv; | |
1521 | auvok = 1; /* Now acting as a sign flag. */ | |
53e2bfb7 | 1522 | } else { |
9354a41f KW |
1523 | /* Using 0- here and later to silence bogus warning |
1524 | * from MS VC */ | |
1525 | auv = (UV) (0 - (UV) aiv); | |
7dca457a NC |
1526 | } |
1527 | } | |
1528 | a_valid = 1; | |
28e5dec8 JH |
1529 | } |
1530 | } | |
7dca457a NC |
1531 | if (a_valid) { |
1532 | bool result_good = 0; | |
1533 | UV result; | |
eb578fdb | 1534 | UV buv; |
800401ee | 1535 | bool buvok = SvUOK(svr); |
a00b5bd3 | 1536 | |
7dca457a | 1537 | if (buvok) |
800401ee | 1538 | buv = SvUVX(svr); |
7dca457a | 1539 | else { |
eb578fdb | 1540 | const IV biv = SvIVX(svr); |
7dca457a NC |
1541 | if (biv >= 0) { |
1542 | buv = biv; | |
1543 | buvok = 1; | |
1544 | } else | |
9354a41f | 1545 | buv = (UV) (0 - (UV) biv); |
7dca457a NC |
1546 | } |
1547 | /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve, | |
602f51c4 | 1548 | else "IV" now, independent of how it came in. |
7dca457a NC |
1549 | if a, b represents positive, A, B negative, a maps to -A etc |
1550 | a + b => (a + b) | |
1551 | A + b => -(a - b) | |
1552 | a + B => (a - b) | |
1553 | A + B => -(a + b) | |
1554 | all UV maths. negate result if A negative. | |
1555 | add if signs same, subtract if signs differ. */ | |
1556 | ||
1557 | if (auvok ^ buvok) { | |
1558 | /* Signs differ. */ | |
1559 | if (auv >= buv) { | |
1560 | result = auv - buv; | |
1561 | /* Must get smaller */ | |
1562 | if (result <= auv) | |
1563 | result_good = 1; | |
1564 | } else { | |
1565 | result = buv - auv; | |
1566 | if (result <= buv) { | |
1567 | /* result really should be -(auv-buv). as its negation | |
1568 | of true value, need to swap our result flag */ | |
1569 | auvok = !auvok; | |
1570 | result_good = 1; | |
28e5dec8 JH |
1571 | } |
1572 | } | |
7dca457a NC |
1573 | } else { |
1574 | /* Signs same */ | |
1575 | result = auv + buv; | |
1576 | if (result >= auv) | |
1577 | result_good = 1; | |
1578 | } | |
1579 | if (result_good) { | |
1580 | SP--; | |
1581 | if (auvok) | |
28e5dec8 | 1582 | SETu( result ); |
7dca457a NC |
1583 | else { |
1584 | /* Negate result */ | |
1585 | if (result <= (UV)IV_MIN) | |
53e2bfb7 DM |
1586 | SETi(result == (UV)IV_MIN |
1587 | ? IV_MIN : -(IV)result); | |
7dca457a NC |
1588 | else { |
1589 | /* result valid, but out of range for IV. */ | |
1590 | SETn( -(NV)result ); | |
28e5dec8 JH |
1591 | } |
1592 | } | |
7dca457a NC |
1593 | RETURN; |
1594 | } /* Overflow, drop through to NVs. */ | |
28e5dec8 JH |
1595 | } |
1596 | } | |
230ee21f DM |
1597 | |
1598 | #else | |
1599 | useleft = USE_LEFT(svl); | |
28e5dec8 | 1600 | #endif |
230ee21f | 1601 | |
a0d0e21e | 1602 | { |
6f1401dc | 1603 | NV value = SvNV_nomg(svr); |
4efa5a16 | 1604 | (void)POPs; |
28e5dec8 JH |
1605 | if (!useleft) { |
1606 | /* left operand is undef, treat as zero. + 0.0 is identity. */ | |
1607 | SETn(value); | |
1608 | RETURN; | |
1609 | } | |
6f1401dc | 1610 | SETn( value + SvNV_nomg(svl) ); |
28e5dec8 | 1611 | RETURN; |
a0d0e21e LW |
1612 | } |
1613 | } | |
1614 | ||
b1c05ba5 DM |
1615 | |
1616 | /* also used for: pp_aelemfast_lex() */ | |
1617 | ||
a0d0e21e LW |
1618 | PP(pp_aelemfast) |
1619 | { | |
20b7effb | 1620 | dSP; |
93bad3fd | 1621 | AV * const av = PL_op->op_type == OP_AELEMFAST_LEX |
8f878375 | 1622 | ? MUTABLE_AV(PAD_SV(PL_op->op_targ)) : GvAVn(cGVOP_gv); |
a3b680e6 | 1623 | const U32 lval = PL_op->op_flags & OPf_MOD; |
7e169e84 DM |
1624 | const I8 key = (I8)PL_op->op_private; |
1625 | SV** svp; | |
1626 | SV *sv; | |
1627 | ||
1628 | assert(SvTYPE(av) == SVt_PVAV); | |
1629 | ||
f4484b87 DM |
1630 | EXTEND(SP, 1); |
1631 | ||
7e169e84 DM |
1632 | /* inlined av_fetch() for simple cases ... */ |
1633 | if (!SvRMAGICAL(av) && key >= 0 && key <= AvFILLp(av)) { | |
1634 | sv = AvARRAY(av)[key]; | |
9fb994be | 1635 | if (sv) { |
7e169e84 DM |
1636 | PUSHs(sv); |
1637 | RETURN; | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | /* ... else do it the hard way */ | |
1642 | svp = av_fetch(av, key, lval); | |
1643 | sv = (svp ? *svp : &PL_sv_undef); | |
b024352e DM |
1644 | |
1645 | if (UNLIKELY(!svp && lval)) | |
7e169e84 | 1646 | DIE(aTHX_ PL_no_aelem, (int)key); |
b024352e | 1647 | |
39cf747a | 1648 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
fd69380d | 1649 | mg_get(sv); |
be6c24e0 | 1650 | PUSHs(sv); |
a0d0e21e LW |
1651 | RETURN; |
1652 | } | |
1653 | ||
1654 | PP(pp_join) | |
1655 | { | |
20b7effb | 1656 | dSP; dMARK; dTARGET; |
a0d0e21e LW |
1657 | MARK++; |
1658 | do_join(TARG, *MARK, MARK, SP); | |
1659 | SP = MARK; | |
1660 | SETs(TARG); | |
1661 | RETURN; | |
1662 | } | |
1663 | ||
a0d0e21e LW |
1664 | /* Oversized hot code. */ |
1665 | ||
b1c05ba5 DM |
1666 | /* also used for: pp_say() */ |
1667 | ||
a0d0e21e LW |
1668 | PP(pp_print) |
1669 | { | |
20b7effb | 1670 | dSP; dMARK; dORIGMARK; |
eb578fdb | 1671 | PerlIO *fp; |
236988e4 | 1672 | MAGIC *mg; |
159b6efe NC |
1673 | GV * const gv |
1674 | = (PL_op->op_flags & OPf_STACKED) ? MUTABLE_GV(*++MARK) : PL_defoutgv; | |
9c9f25b8 | 1675 | IO *io = GvIO(gv); |
5b468f54 | 1676 | |
9c9f25b8 | 1677 | if (io |
ad64d0ec | 1678 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
5b468f54 | 1679 | { |
01bb7c6d | 1680 | had_magic: |
68dc0745 | 1681 | if (MARK == ORIGMARK) { |
1c846c1f | 1682 | /* If using default handle then we need to make space to |
a60c0954 NIS |
1683 | * pass object as 1st arg, so move other args up ... |
1684 | */ | |
4352c267 | 1685 | MEXTEND(SP, 1); |
68dc0745 | 1686 | ++MARK; |
1687 | Move(MARK, MARK + 1, (SP - MARK) + 1, SV*); | |
1688 | ++SP; | |
1689 | } | |
3e0cb5de | 1690 | return Perl_tied_method(aTHX_ SV_CONST(PRINT), mark - 1, MUTABLE_SV(io), |
94bc412f NC |
1691 | mg, |
1692 | (G_SCALAR | TIED_METHOD_ARGUMENTS_ON_STACK | |
1693 | | (PL_op->op_type == OP_SAY | |
1694 | ? TIED_METHOD_SAY : 0)), sp - mark); | |
236988e4 | 1695 | } |
9c9f25b8 | 1696 | if (!io) { |
68b590d9 | 1697 | if ( gv && GvEGVx(gv) && (io = GvIO(GvEGV(gv))) |
ad64d0ec | 1698 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
01bb7c6d | 1699 | goto had_magic; |
51087808 | 1700 | report_evil_fh(gv); |
93189314 | 1701 | SETERRNO(EBADF,RMS_IFI); |
a0d0e21e LW |
1702 | goto just_say_no; |
1703 | } | |
1704 | else if (!(fp = IoOFP(io))) { | |
7716c5c5 NC |
1705 | if (IoIFP(io)) |
1706 | report_wrongway_fh(gv, '<'); | |
51087808 | 1707 | else |
7716c5c5 | 1708 | report_evil_fh(gv); |
93189314 | 1709 | SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI); |
a0d0e21e LW |
1710 | goto just_say_no; |
1711 | } | |
1712 | else { | |
e23d9e2f | 1713 | SV * const ofs = GvSV(PL_ofsgv); /* $, */ |
a0d0e21e | 1714 | MARK++; |
e23d9e2f | 1715 | if (ofs && (SvGMAGICAL(ofs) || SvOK(ofs))) { |
a0d0e21e LW |
1716 | while (MARK <= SP) { |
1717 | if (!do_print(*MARK, fp)) | |
1718 | break; | |
1719 | MARK++; | |
1720 | if (MARK <= SP) { | |
e23d9e2f CS |
1721 | /* don't use 'ofs' here - it may be invalidated by magic callbacks */ |
1722 | if (!do_print(GvSV(PL_ofsgv), fp)) { | |
a0d0e21e LW |
1723 | MARK--; |
1724 | break; | |
1725 | } | |
1726 | } | |
1727 | } | |
1728 | } | |
1729 | else { | |
1730 | while (MARK <= SP) { | |
1731 | if (!do_print(*MARK, fp)) | |
1732 | break; | |
1733 | MARK++; | |
1734 | } | |
1735 | } | |
1736 | if (MARK <= SP) | |
1737 | goto just_say_no; | |
1738 | else { | |
cfc4a7da GA |
1739 | if (PL_op->op_type == OP_SAY) { |
1740 | if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp)) | |
1741 | goto just_say_no; | |
1742 | } | |
1743 | else if (PL_ors_sv && SvOK(PL_ors_sv)) | |
7889fe52 | 1744 | if (!do_print(PL_ors_sv, fp)) /* $\ */ |
a0d0e21e LW |
1745 | goto just_say_no; |
1746 | ||
1747 | if (IoFLAGS(io) & IOf_FLUSH) | |
760ac839 | 1748 | if (PerlIO_flush(fp) == EOF) |
a0d0e21e LW |
1749 | goto just_say_no; |
1750 | } | |
1751 | } | |
1752 | SP = ORIGMARK; | |
e52fd6f4 | 1753 | XPUSHs(&PL_sv_yes); |
a0d0e21e LW |
1754 | RETURN; |
1755 | ||
1756 | just_say_no: | |
1757 | SP = ORIGMARK; | |
e52fd6f4 | 1758 | XPUSHs(&PL_sv_undef); |
a0d0e21e LW |
1759 | RETURN; |
1760 | } | |
1761 | ||
b1c05ba5 | 1762 | |
aa36782f DM |
1763 | /* do the common parts of pp_padhv() and pp_rv2hv() |
1764 | * It assumes the caller has done EXTEND(SP, 1) or equivalent. | |
af3b1cba | 1765 | * 'is_keys' indicates the OPpPADHV_ISKEYS/OPpRV2HV_ISKEYS flag is set. |
e84e4286 DM |
1766 | * 'has_targ' indicates that the op has a target - this should |
1767 | * be a compile-time constant so that the code can constant-folded as | |
1768 | * appropriate | |
aa36782f DM |
1769 | * */ |
1770 | ||
1771 | PERL_STATIC_INLINE OP* | |
e84e4286 | 1772 | S_padhv_rv2hv_common(pTHX_ HV *hv, U8 gimme, bool is_keys, bool has_targ) |
aa36782f | 1773 | { |
e80717e7 DM |
1774 | bool is_tied; |
1775 | bool is_bool; | |
e1ad5d4c | 1776 | MAGIC *mg; |
aa36782f | 1777 | dSP; |
e80717e7 DM |
1778 | IV i; |
1779 | SV *sv; | |
aa36782f DM |
1780 | |
1781 | assert(PL_op->op_type == OP_PADHV || PL_op->op_type == OP_RV2HV); | |
1782 | ||
1783 | if (gimme == G_ARRAY) { | |
8dc9003f | 1784 | hv_pushkv(hv, 3); |
af3b1cba | 1785 | return NORMAL; |
aa36782f DM |
1786 | } |
1787 | ||
1788 | if (is_keys) | |
1789 | /* 'keys %h' masquerading as '%h': reset iterator */ | |
1790 | (void)hv_iterinit(hv); | |
1791 | ||
6f2dc9a6 DM |
1792 | if (gimme == G_VOID) |
1793 | return NORMAL; | |
1794 | ||
e80717e7 DM |
1795 | is_bool = ( PL_op->op_private & OPpTRUEBOOL |
1796 | || ( PL_op->op_private & OPpMAYBE_TRUEBOOL | |
1797 | && block_gimme() == G_VOID)); | |
1798 | is_tied = SvRMAGICAL(hv) && (mg = mg_find(MUTABLE_SV(hv), PERL_MAGIC_tied)); | |
1799 | ||
1800 | if (UNLIKELY(is_tied)) { | |
1801 | if (is_keys && !is_bool) { | |
1802 | i = 0; | |
1803 | while (hv_iternext(hv)) | |
1804 | i++; | |
1805 | goto push_i; | |
1806 | } | |
1807 | else { | |
1808 | sv = magic_scalarpack(hv, mg); | |
1809 | goto push_sv; | |
1810 | } | |
3cd2c7d4 | 1811 | } |
e80717e7 DM |
1812 | else { |
1813 | i = HvUSEDKEYS(hv); | |
1814 | if (is_bool) { | |
1815 | sv = i ? &PL_sv_yes : &PL_sv_zero; | |
1816 | push_sv: | |
1817 | PUSHs(sv); | |
1818 | } | |
1819 | else { | |
1820 | push_i: | |
e84e4286 DM |
1821 | if (has_targ) { |
1822 | dTARGET; | |
1823 | PUSHi(i); | |
1824 | } | |
1825 | else | |
6f2dc9a6 DM |
1826 | if (is_keys) { |
1827 | /* parent op should be an unused OP_KEYS whose targ we can | |
1828 | * use */ | |
1829 | dTARG; | |
1830 | OP *k; | |
1831 | ||
1832 | assert(!OpHAS_SIBLING(PL_op)); | |
1833 | k = PL_op->op_sibparent; | |
1834 | assert(k->op_type == OP_KEYS); | |
1835 | TARG = PAD_SV(k->op_targ); | |
1836 | PUSHi(i); | |
1837 | } | |
1838 | else | |
e84e4286 | 1839 | mPUSHi(i); |
aa36782f | 1840 | } |
aa36782f DM |
1841 | } |
1842 | ||
1843 | PUTBACK; | |
1844 | return NORMAL; | |
1845 | } | |
1846 | ||
1847 | ||
e855b461 DM |
1848 | /* This is also called directly by pp_lvavref. */ |
1849 | PP(pp_padav) | |
1850 | { | |
1851 | dSP; dTARGET; | |
1852 | U8 gimme; | |
1853 | assert(SvTYPE(TARG) == SVt_PVAV); | |
1854 | if (UNLIKELY( PL_op->op_private & OPpLVAL_INTRO )) | |
1855 | if (LIKELY( !(PL_op->op_private & OPpPAD_STATE) )) | |
1856 | SAVECLEARSV(PAD_SVl(PL_op->op_targ)); | |
1857 | EXTEND(SP, 1); | |
1858 | ||
1859 | if (PL_op->op_flags & OPf_REF) { | |
1860 | PUSHs(TARG); | |
1861 | RETURN; | |
1862 | } | |
1863 | else if (PL_op->op_private & OPpMAYBE_LVSUB) { | |
1864 | const I32 flags = is_lvalue_sub(); | |
1865 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
1866 | if (GIMME_V == G_SCALAR) | |
1867 | /* diag_listed_as: Can't return %s to lvalue scalar context */ | |
1868 | Perl_croak(aTHX_ "Can't return array to lvalue scalar context"); | |
1869 | PUSHs(TARG); | |
1870 | RETURN; | |
1871 | } | |
1872 | } | |
1873 | ||
1874 | gimme = GIMME_V; | |
0b5aba47 DM |
1875 | if (gimme == G_ARRAY) |
1876 | return S_pushav(aTHX_ (AV*)TARG); | |
327c9b9e DM |
1877 | |
1878 | if (gimme == G_SCALAR) { | |
e855b461 DM |
1879 | const SSize_t maxarg = AvFILL(MUTABLE_AV(TARG)) + 1; |
1880 | if (!maxarg) | |
1881 | PUSHs(&PL_sv_zero); | |
1882 | else if (PL_op->op_private & OPpTRUEBOOL) | |
1883 | PUSHs(&PL_sv_yes); | |
1884 | else | |
1885 | mPUSHi(maxarg); | |
1886 | } | |
1887 | RETURN; | |
1888 | } | |
1889 | ||
1890 | ||
1891 | PP(pp_padhv) | |
1892 | { | |
1893 | dSP; dTARGET; | |
1894 | U8 gimme; | |
e855b461 DM |
1895 | |
1896 | assert(SvTYPE(TARG) == SVt_PVHV); | |
e855b461 DM |
1897 | if (UNLIKELY( PL_op->op_private & OPpLVAL_INTRO )) |
1898 | if (LIKELY( !(PL_op->op_private & OPpPAD_STATE) )) | |
1899 | SAVECLEARSV(PAD_SVl(PL_op->op_targ)); | |
1900 | ||
aa36782f DM |
1901 | EXTEND(SP, 1); |
1902 | ||
1903 | if (PL_op->op_flags & OPf_REF) { | |
1904 | PUSHs(TARG); | |
e855b461 | 1905 | RETURN; |
aa36782f | 1906 | } |
e855b461 DM |
1907 | else if (PL_op->op_private & OPpMAYBE_LVSUB) { |
1908 | const I32 flags = is_lvalue_sub(); | |
1909 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
1910 | if (GIMME_V == G_SCALAR) | |
1911 | /* diag_listed_as: Can't return %s to lvalue scalar context */ | |
1912 | Perl_croak(aTHX_ "Can't return hash to lvalue scalar context"); | |
aa36782f | 1913 | PUSHs(TARG); |
e855b461 DM |
1914 | RETURN; |
1915 | } | |
1916 | } | |
1917 | ||
1918 | gimme = GIMME_V; | |
e855b461 | 1919 | |
aa36782f | 1920 | return S_padhv_rv2hv_common(aTHX_ (HV*)TARG, gimme, |
e84e4286 DM |
1921 | cBOOL(PL_op->op_private & OPpPADHV_ISKEYS), |
1922 | 0 /* has_targ*/); | |
e855b461 DM |
1923 | } |
1924 | ||
1925 | ||
b1c05ba5 | 1926 | /* also used for: pp_rv2hv() */ |
bdaf10a5 | 1927 | /* also called directly by pp_lvavref */ |
b1c05ba5 | 1928 | |
a0d0e21e LW |
1929 | PP(pp_rv2av) |
1930 | { | |
20b7effb | 1931 | dSP; dTOPss; |
1c23e2bd | 1932 | const U8 gimme = GIMME_V; |
13c59d41 MH |
1933 | static const char an_array[] = "an ARRAY"; |
1934 | static const char a_hash[] = "a HASH"; | |
bdaf10a5 FC |
1935 | const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV |
1936 | || PL_op->op_type == OP_LVAVREF; | |
d83b45b8 | 1937 | const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV; |
a0d0e21e | 1938 | |
9026059d | 1939 | SvGETMAGIC(sv); |
a0d0e21e | 1940 | if (SvROK(sv)) { |
5d9574c1 | 1941 | if (UNLIKELY(SvAMAGIC(sv))) { |
93d7320b | 1942 | sv = amagic_deref_call(sv, is_pp_rv2av ? to_av_amg : to_hv_amg); |
93d7320b | 1943 | } |
17ab7946 | 1944 | sv = SvRV(sv); |
5d9574c1 | 1945 | if (UNLIKELY(SvTYPE(sv) != type)) |
dcbac5bb | 1946 | /* diag_listed_as: Not an ARRAY reference */ |
13c59d41 | 1947 | DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash); |
5d9574c1 DM |
1948 | else if (UNLIKELY(PL_op->op_flags & OPf_MOD |
1949 | && PL_op->op_private & OPpLVAL_INTRO)) | |
3da99855 | 1950 | Perl_croak(aTHX_ "%s", PL_no_localize_ref); |
a0d0e21e | 1951 | } |
5d9574c1 | 1952 | else if (UNLIKELY(SvTYPE(sv) != type)) { |
67955e0c | 1953 | GV *gv; |
1c846c1f | 1954 | |
6e592b3a | 1955 | if (!isGV_with_GP(sv)) { |
13c59d41 | 1956 | gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash, |
dc3c76f8 NC |
1957 | type, &sp); |
1958 | if (!gv) | |
1959 | RETURN; | |
35cd451c GS |
1960 | } |
1961 | else { | |
159b6efe | 1962 | gv = MUTABLE_GV(sv); |
a0d0e21e | 1963 | } |
ad64d0ec | 1964 | sv = is_pp_rv2av ? MUTABLE_SV(GvAVn(gv)) : MUTABLE_SV(GvHVn(gv)); |
533c011a | 1965 | if (PL_op->op_private & OPpLVAL_INTRO) |
ad64d0ec | 1966 | sv = is_pp_rv2av ? MUTABLE_SV(save_ary(gv)) : MUTABLE_SV(save_hash(gv)); |
9f527363 FC |
1967 | } |
1968 | if (PL_op->op_flags & OPf_REF) { | |
17ab7946 | 1969 | SETs(sv); |
a0d0e21e | 1970 | RETURN; |
9f527363 | 1971 | } |
5d9574c1 | 1972 | else if (UNLIKELY(PL_op->op_private & OPpMAYBE_LVSUB)) { |
40c94d11 FC |
1973 | const I32 flags = is_lvalue_sub(); |
1974 | if (flags && !(flags & OPpENTERSUB_INARGS)) { | |
cde874ca | 1975 | if (gimme != G_ARRAY) |
042560a6 | 1976 | goto croak_cant_return; |
17ab7946 | 1977 | SETs(sv); |
78f9721b | 1978 | RETURN; |
40c94d11 | 1979 | } |
a0d0e21e LW |
1980 | } |
1981 | ||
17ab7946 | 1982 | if (is_pp_rv2av) { |
502c6561 | 1983 | AV *const av = MUTABLE_AV(sv); |
0b5aba47 | 1984 | |
96913b52 | 1985 | if (gimme == G_ARRAY) { |
d5524600 DM |
1986 | SP--; |
1987 | PUTBACK; | |
0b5aba47 | 1988 | return S_pushav(aTHX_ av); |
1c846c1f | 1989 | } |
0b5aba47 DM |
1990 | |
1991 | if (gimme == G_SCALAR) { | |
c70927a6 | 1992 | const SSize_t maxarg = AvFILL(av) + 1; |
7be75ccf DM |
1993 | if (PL_op->op_private & OPpTRUEBOOL) |
1994 | SETs(maxarg ? &PL_sv_yes : &PL_sv_zero); | |
1995 | else { | |
1996 | dTARGET; | |
1997 | SETi(maxarg); | |
1998 | } | |
93965878 | 1999 | } |
7be75ccf DM |
2000 | } |
2001 | else { | |
aa36782f DM |
2002 | SP--; PUTBACK; |
2003 | return S_padhv_rv2hv_common(aTHX_ (HV*)sv, gimme, | |
e84e4286 DM |
2004 | cBOOL(PL_op->op_private & OPpRV2HV_ISKEYS), |
2005 | 1 /* has_targ*/); | |
17ab7946 | 2006 | } |
be85d344 | 2007 | RETURN; |
042560a6 NC |
2008 | |
2009 | croak_cant_return: | |
2010 | Perl_croak(aTHX_ "Can't return %s to lvalue scalar context", | |
2011 | is_pp_rv2av ? "array" : "hash"); | |
77e217c6 | 2012 | RETURN; |
a0d0e21e LW |
2013 | } |
2014 | ||
10c8fecd | 2015 | STATIC void |
fb8f4cf8 | 2016 | S_do_oddball(pTHX_ SV **oddkey, SV **firstkey) |
10c8fecd | 2017 | { |
7918f24d NC |
2018 | PERL_ARGS_ASSERT_DO_ODDBALL; |
2019 | ||
fb8f4cf8 | 2020 | if (*oddkey) { |
6d822dc4 | 2021 | if (ckWARN(WARN_MISC)) { |
a3b680e6 | 2022 | const char *err; |
fb8f4cf8 RZ |
2023 | if (oddkey == firstkey && |
2024 | SvROK(*oddkey) && | |
2025 | (SvTYPE(SvRV(*oddkey)) == SVt_PVAV || | |
2026 | SvTYPE(SvRV(*oddkey)) == SVt_PVHV)) | |
10c8fecd | 2027 | { |
a3b680e6 | 2028 | err = "Reference found where even-sized list expected"; |
10c8fecd GS |
2029 | } |
2030 | else | |
a3b680e6 | 2031 | err = "Odd number of elements in hash assignment"; |
f1f66076 | 2032 | Perl_warner(aTHX_ packWARN(WARN_MISC), "%s", err); |
10c8fecd | 2033 | } |
6d822dc4 | 2034 | |
10c8fecd GS |
2035 | } |
2036 | } | |
2037 | ||
a5f48505 DM |
2038 | |
2039 | /* Do a mark and sweep with the SVf_BREAK flag to detect elements which | |
2040 | * are common to both the LHS and RHS of an aassign, and replace them | |
2041 | * with copies. All these copies are made before the actual list assign is | |
2042 | * done. | |
2043 | * | |
2044 | * For example in ($a,$b) = ($b,$a), assigning the value of the first RHS | |
2045 | * element ($b) to the first LH element ($a), modifies $a; when the | |
2046 | * second assignment is done, the second RH element now has the wrong | |
2047 | * value. So we initially replace the RHS with ($b, mortalcopy($a)). | |
2048 | * Note that we don't need to make a mortal copy of $b. | |
2049 | * | |
2050 | * The algorithm below works by, for every RHS element, mark the | |
2051 | * corresponding LHS target element with SVf_BREAK. Then if the RHS | |
2052 | * element is found with SVf_BREAK set, it means it would have been | |
2053 | * modified, so make a copy. | |
2054 | * Note that by scanning both LHS and RHS in lockstep, we avoid | |
2055 | * unnecessary copies (like $b above) compared with a naive | |
2056 | * "mark all LHS; copy all marked RHS; unmark all LHS". | |
2057 | * | |
2058 | * If the LHS element is a 'my' declaration' and has a refcount of 1, then | |
2059 | * it can't be common and can be skipped. | |
ebc643ce DM |
2060 | * |
2061 | * On DEBUGGING builds it takes an extra boolean, fake. If true, it means | |
2062 | * that we thought we didn't need to call S_aassign_copy_common(), but we | |
2063 | * have anyway for sanity checking. If we find we need to copy, then panic. | |
a5f48505 DM |
2064 | */ |
2065 | ||
2066 | PERL_STATIC_INLINE void | |
2067 | S_aassign_copy_common(pTHX_ SV **firstlelem, SV **lastlelem, | |
ebc643ce DM |
2068 | SV **firstrelem, SV **lastrelem |
2069 | #ifdef DEBUGGING | |
2070 | , bool fake | |
2071 | #endif | |
2072 | ) | |
a5f48505 DM |
2073 | { |
2074 | dVAR; | |
2075 | SV **relem; | |
2076 | SV **lelem; | |
2077 | SSize_t lcount = lastlelem - firstlelem + 1; | |
2078 | bool marked = FALSE; /* have we marked any LHS with SVf_BREAK ? */ | |
2079 | bool const do_rc1 = cBOOL(PL_op->op_private & OPpASSIGN_COMMON_RC1); | |
beb08a1e | 2080 | bool copy_all = FALSE; |
a5f48505 DM |
2081 | |
2082 | assert(!PL_in_clean_all); /* SVf_BREAK not already in use */ | |
2083 | assert(firstlelem < lastlelem); /* at least 2 LH elements */ | |
2084 | assert(firstrelem < lastrelem); /* at least 2 RH elements */ | |
2085 | ||
ebc643ce DM |
2086 | |
2087 | lelem = firstlelem; | |
a5f48505 DM |
2088 | /* we never have to copy the first RH element; it can't be corrupted |
2089 | * by assigning something to the corresponding first LH element. | |
2090 | * So this scan does in a loop: mark LHS[N]; test RHS[N+1] | |
2091 | */ | |
ebc643ce | 2092 | relem = firstrelem + 1; |
a5f48505 DM |
2093 | |
2094 | for (; relem <= lastrelem; relem++) { | |
2095 | SV *svr; | |
2096 | ||
2097 | /* mark next LH element */ | |
2098 | ||
2099 | if (--lcount >= 0) { | |
2100 | SV *svl = *lelem++; | |
2101 | ||
2102 | if (UNLIKELY(!svl)) {/* skip AV alias marker */ | |
2103 | assert (lelem <= lastlelem); | |
2104 | svl = *lelem++; | |
2105 | lcount--; | |
2106 | } | |
2107 | ||
2108 | assert(svl); | |
beb08a1e TC |
2109 | if (SvSMAGICAL(svl)) { |
2110 | copy_all = TRUE; | |
2111 | } | |
a5f48505 DM |
2112 | if (SvTYPE(svl) == SVt_PVAV || SvTYPE(svl) == SVt_PVHV) { |
2113 | if (!marked) | |
2114 | return; | |
2115 | /* this LH element will consume all further args; | |
2116 | * no need to mark any further LH elements (if any). | |
2117 | * But we still need to scan any remaining RHS elements; | |
2118 | * set lcount negative to distinguish from lcount == 0, | |
2119 | * so the loop condition continues being true | |
2120 | */ | |
2121 | lcount = -1; | |
2122 | lelem--; /* no need to unmark this element */ | |
2123 | } | |
94a5f659 | 2124 | else if (!(do_rc1 && SvREFCNT(svl) == 1) && !SvIMMORTAL(svl)) { |
a5f48505 DM |
2125 | SvFLAGS(svl) |= SVf_BREAK; |
2126 | marked = TRUE; | |
2127 | } | |
2128 | else if (!marked) { | |
2129 | /* don't check RH element if no SVf_BREAK flags set yet */ | |
2130 | if (!lcount) | |
2131 | break; | |
2132 | continue; | |
2133 | } | |
2134 | } | |
2135 | ||
2136 | /* see if corresponding RH element needs copying */ | |
2137 | ||
2138 | assert(marked); | |
2139 | svr = *relem; | |
2140 | assert(svr); | |
2141 | ||
5c1db569 | 2142 | if (UNLIKELY(SvFLAGS(svr) & (SVf_BREAK|SVs_GMG) || copy_all)) { |
1050723f | 2143 | U32 brk = (SvFLAGS(svr) & SVf_BREAK); |
a5f48505 | 2144 | |
ebc643ce DM |
2145 | #ifdef DEBUGGING |
2146 | if (fake) { | |
9ae0115f | 2147 | /* op_dump(PL_op); */ |
ebc643ce DM |
2148 | Perl_croak(aTHX_ |
2149 | "panic: aassign skipped needed copy of common RH elem %" | |
2150 | UVuf, (UV)(relem - firstrelem)); | |
2151 | } | |
2152 | #endif | |
2153 | ||
a5f48505 DM |
2154 | TAINT_NOT; /* Each item is independent */ |
2155 | ||
2156 | /* Dear TODO test in t/op/sort.t, I love you. | |
2157 | (It's relying on a panic, not a "semi-panic" from newSVsv() | |
2158 | and then an assertion failure below.) */ | |
2159 | if (UNLIKELY(SvIS_FREED(svr))) { | |
2160 | Perl_croak(aTHX_ "panic: attempt to copy freed scalar %p", | |
2161 | (void*)svr); | |
2162 | } | |
2163 | /* avoid break flag while copying; otherwise COW etc | |
2164 | * disabled... */ | |
2165 | SvFLAGS(svr) &= ~SVf_BREAK; | |
2166 | /* Not newSVsv(), as it does not allow copy-on-write, | |
8c1e192f DM |
2167 | resulting in wasteful copies. |
2168 | Also, we use SV_NOSTEAL in case the SV is used more than | |
2169 | once, e.g. (...) = (f())[0,0] | |
2170 | Where the same SV appears twice on the RHS without a ref | |
2171 | count bump. (Although I suspect that the SV won't be | |
2172 | stealable here anyway - DAPM). | |
2173 | */ | |
a5f48505 DM |
2174 | *relem = sv_mortalcopy_flags(svr, |
2175 | SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL); | |
2176 | /* ... but restore afterwards in case it's needed again, | |
2177 | * e.g. ($a,$b,$c) = (1,$a,$a) | |
2178 | */ | |
1050723f | 2179 | SvFLAGS(svr) |= brk; |
a5f48505 DM |
2180 | } |
2181 | ||
2182 | if (!lcount) | |
2183 | break; | |
2184 | } | |
2185 | ||
2186 | if (!marked) | |
2187 | return; | |
2188 | ||
2189 | /*unmark LHS */ | |
2190 | ||
2191 | while (lelem > firstlelem) { | |
2192 | SV * const svl = *(--lelem); | |
2193 | if (svl) | |
2194 | SvFLAGS(svl) &= ~SVf_BREAK; | |
2195 | } | |
2196 | } | |
2197 | ||
2198 | ||
2199 | ||
a0d0e21e LW |
2200 | PP(pp_aassign) |
2201 | { | |
27da23d5 | 2202 | dVAR; dSP; |
3280af22 NIS |
2203 | SV **lastlelem = PL_stack_sp; |
2204 | SV **lastrelem = PL_stack_base + POPMARK; | |
2205 | SV **firstrelem = PL_stack_base + POPMARK + 1; | |
a0d0e21e LW |
2206 | SV **firstlelem = lastrelem + 1; |
2207 | ||
eb578fdb KW |
2208 | SV **relem; |
2209 | SV **lelem; | |
1c23e2bd | 2210 | U8 gimme; |
a68090fe DM |
2211 | /* PL_delaymagic is restored by JUMPENV_POP on dieing, so we |
2212 | * only need to save locally, not on the save stack */ | |
2213 | U16 old_delaymagic = PL_delaymagic; | |
ebc643ce DM |
2214 | #ifdef DEBUGGING |
2215 | bool fake = 0; | |
2216 | #endif | |
5637b936 | 2217 | |
3280af22 | 2218 | PL_delaymagic = DM_DELAY; /* catch simultaneous items */ |
a0d0e21e LW |
2219 | |
2220 | /* If there's a common identifier on both sides we have to take | |
2221 | * special care that assigning the identifier on the left doesn't | |
2222 | * clobber a value on the right that's used later in the list. | |
2223 | */ | |
acdea6f0 | 2224 | |
beb08a1e TC |
2225 | /* at least 2 LH and RH elements, or commonality isn't an issue */ |
2226 | if (firstlelem < lastlelem && firstrelem < lastrelem) { | |
5c1db569 TC |
2227 | for (relem = firstrelem+1; relem <= lastrelem; relem++) { |
2228 | if (SvGMAGICAL(*relem)) | |
2229 | goto do_scan; | |
2230 | } | |
beb08a1e TC |
2231 | for (lelem = firstlelem; lelem <= lastlelem; lelem++) { |
2232 | if (*lelem && SvSMAGICAL(*lelem)) | |
2233 | goto do_scan; | |
a5f48505 | 2234 | } |
beb08a1e TC |
2235 | if ( PL_op->op_private & (OPpASSIGN_COMMON_SCALAR|OPpASSIGN_COMMON_RC1) ) { |
2236 | if (PL_op->op_private & OPpASSIGN_COMMON_RC1) { | |
2237 | /* skip the scan if all scalars have a ref count of 1 */ | |
2238 | for (lelem = firstlelem; lelem <= lastlelem; lelem++) { | |
8b0c3377 | 2239 | SV *sv = *lelem; |
beb08a1e TC |
2240 | if (!sv || SvREFCNT(sv) == 1) |
2241 | continue; | |
2242 | if (SvTYPE(sv) != SVt_PVAV && SvTYPE(sv) != SVt_PVAV) | |
2243 | goto do_scan; | |
2244 | break; | |
2245 | } | |
2246 | } | |
2247 | else { | |
2248 | do_scan: | |
2249 | S_aassign_copy_common(aTHX_ | |
2250 | firstlelem, lastlelem, firstrelem, lastrelem | |
ebc643ce | 2251 | #ifdef DEBUGGING |
beb08a1e | 2252 | , fake |
ebc643ce | 2253 | #endif |
beb08a1e TC |
2254 | ); |
2255 | } | |
a5f48505 | 2256 | } |
a0d0e21e | 2257 | } |
ebc643ce DM |
2258 | #ifdef DEBUGGING |
2259 | else { | |
2260 | /* on debugging builds, do the scan even if we've concluded we | |
2261 | * don't need to, then panic if we find commonality. Note that the | |
2262 | * scanner assumes at least 2 elements */ | |
2263 | if (firstlelem < lastlelem && firstrelem < lastrelem) { | |
2264 | fake = 1; | |
2265 | goto do_scan; | |
2266 | } | |
2267 | } | |
2268 | #endif | |
a0d0e21e | 2269 | |
a5f48505 | 2270 | gimme = GIMME_V; |
a0d0e21e LW |
2271 | relem = firstrelem; |
2272 | lelem = firstlelem; | |
10c8fecd | 2273 | |
8b0c3377 DM |
2274 | if (relem > lastrelem) |
2275 | goto no_relems; | |
2276 | ||
2277 | /* first lelem loop while there are still relems */ | |
5d9574c1 | 2278 | while (LIKELY(lelem <= lastlelem)) { |
bdaf10a5 | 2279 | bool alias = FALSE; |
8b0c3377 DM |
2280 | SV *lsv = *lelem++; |
2281 | ||
c73f612f DM |
2282 | TAINT_NOT; /* Each item stands on its own, taintwise. */ |
2283 | ||
8b0c3377 DM |
2284 | assert(relem <= lastrelem); |
2285 | if (UNLIKELY(!lsv)) { | |
bdaf10a5 | 2286 | alias = TRUE; |
8b0c3377 DM |
2287 | lsv = *lelem++; |
2288 | ASSUME(SvTYPE(lsv) == SVt_PVAV); | |
bdaf10a5 | 2289 | } |
a5f48505 | 2290 | |
8b0c3377 DM |
2291 | switch (SvTYPE(lsv)) { |
2292 | case SVt_PVAV: { | |
2293 | SV **svp; | |
2294 | SSize_t i; | |
2295 | SSize_t tmps_base; | |
2296 | SSize_t nelems = lastrelem - relem + 1; | |
b09ed995 | 2297 | AV *ary = MUTABLE_AV(lsv); |
8b0c3377 DM |
2298 | |
2299 | /* Assigning to an aggregate is tricky. First there is the | |
2300 | * issue of commonality, e.g. @a = ($a[0]). Since the | |
2301 | * stack isn't refcounted, clearing @a prior to storing | |
2302 | * elements will free $a[0]. Similarly with | |
2303 | * sub FETCH { $status[$_[1]] } @status = @tied[0,1]; | |
2304 | * | |
2305 | * The way to avoid these issues is to make the copy of each | |
2306 | * SV (and we normally store a *copy* in the array) *before* | |
2307 | * clearing the array. But this has a problem in that | |
2308 | * if the code croaks during copying, the not-yet-stored copies | |
2309 | * could leak. One way to avoid this is to make all the copies | |
2310 | * mortal, but that's quite expensive. | |
2311 | * | |
2312 | * The current solution to these issues is to use a chunk | |
2313 | * of the tmps stack as a temporary refcounted-stack. SVs | |
2314 | * will be put on there during processing to avoid leaks, | |
2315 | * but will be removed again before the end of this block, | |
2316 | * so free_tmps() is never normally called. Also, the | |
2317 | * sv_refcnt of the SVs doesn't have to be manipulated, since | |
2318 | * the ownership of 1 reference count is transferred directly | |
2319 | * from the tmps stack to the AV when the SV is stored. | |
2320 | * | |
2321 | * We disarm slots in the temps stack by storing PL_sv_undef | |
2322 | * there: it doesn't matter if that SV's refcount is | |
2323 | * repeatedly decremented during a croak. But usually this is | |
2324 | * only an interim measure. By the end of this code block | |
2325 | * we try where possible to not leave any PL_sv_undef's on the | |
2326 | * tmps stack e.g. by shuffling newer entries down. | |
2327 | * | |
2328 | * There is one case where we don't copy: non-magical | |
2329 | * SvTEMP(sv)'s with a ref count of 1. The only owner of these | |
2330 | * is on the tmps stack, so its safe to directly steal the SV | |
2331 | * rather than copying. This is common in things like function | |
2332 | * returns, map etc, which all return a list of such SVs. | |
2333 | * | |
2334 | * Note however something like @a = (f())[0,0], where there is | |
2335 | * a danger of the same SV being shared: this avoided because | |
2336 | * when the SV is stored as $a[0], its ref count gets bumped, | |
2337 | * so the RC==1 test fails and the second element is copied | |
2338 | * instead. | |
2339 | * | |
2340 | * We also use one slot in the tmps stack to hold an extra | |
2341 | * ref to the array, to ensure it doesn't get prematurely | |
2342 | * freed. Again, this is removed before the end of this block. | |
2343 | * | |
2344 | * Note that OPpASSIGN_COMMON_AGG is used to flag a possible | |
2345 | * @a = ($a[0]) case, but the current implementation uses the | |
2346 | * same algorithm regardless, so ignores that flag. (It *is* | |
2347 | * used in the hash branch below, however). | |
2348 | */ | |
2349 | ||
2350 | /* Reserve slots for ary, plus the elems we're about to copy, | |
2351 | * then protect ary and temporarily void the remaining slots | |
2352 | * with &PL_sv_undef */ | |
2353 | EXTEND_MORTAL(nelems + 1); | |
2354 | PL_tmps_stack[++PL_tmps_ix] = SvREFCNT_inc_simple_NN(ary); | |
2355 | tmps_base = PL_tmps_ix + 1; | |
2356 | for (i = 0; i < nelems; i++) | |
2357 | PL_tmps_stack[tmps_base + i] = &PL_sv_undef; | |
2358 | PL_tmps_ix += nelems; | |
2359 | ||
2360 | /* Make a copy of each RHS elem and save on the tmps_stack | |
2361 | * (or pass through where we can optimise away the copy) */ | |
2362 | ||
2363 | if (UNLIKELY(alias)) { | |
2364 | U32 lval = (gimme == G_ARRAY) | |
2365 | ? (PL_op->op_flags & OPf_MOD || LVRET) : 0; | |
a5f48505 | 2366 | for (svp = relem; svp <= lastrelem; svp++) { |
8b0c3377 DM |
2367 | SV *rsv = *svp; |
2368 | ||
2369 | SvGETMAGIC(rsv); | |
2370 | if (!SvROK(rsv)) | |
2371 | DIE(aTHX_ "Assigned value is not a reference"); | |
2372 | if (SvTYPE(SvRV(rsv)) > SVt_PVLV) | |
2373 | /* diag_listed_as: Assigned value is not %s reference */ | |
2374 | DIE(aTHX_ | |
2375 | "Assigned value is not a SCALAR reference"); | |
2376 | if (lval) | |
2377 | *svp = rsv = sv_mortalcopy(rsv); | |
2378 | /* XXX else check for weak refs? */ | |
2379 | rsv = SvREFCNT_inc_NN(SvRV(rsv)); | |
2380 | assert(tmps_base <= PL_tmps_max); | |
2381 | PL_tmps_stack[tmps_base++] = rsv; | |
a5f48505 | 2382 | } |
a5f48505 | 2383 | } |
8b0c3377 DM |
2384 | else { |
2385 | for (svp = relem; svp <= lastrelem; svp++) { | |
2386 | SV *rsv = *svp; | |
a5f48505 | 2387 | |
8b0c3377 DM |
2388 | if (SvTEMP(rsv) && !SvGMAGICAL(rsv) && SvREFCNT(rsv) == 1) { |
2389 | /* can skip the copy */ | |
2390 | SvREFCNT_inc_simple_void_NN(rsv); | |
2391 | SvTEMP_off(rsv); | |
2392 | } | |
a5f48505 | 2393 | else { |
8b0c3377 DM |
2394 | SV *nsv; |
2395 | /* do get before newSV, in case it dies and leaks */ | |
2396 | SvGETMAGIC(rsv); | |
2397 | nsv = newSV(0); | |
8c1e192f DM |
2398 | /* see comment in S_aassign_copy_common about |
2399 | * SV_NOSTEAL */ | |
8b0c3377 DM |
2400 | sv_setsv_flags(nsv, rsv, |
2401 | (SV_DO_COW_SVSETSV|SV_NOSTEAL)); | |
2402 | rsv = *svp = nsv; | |
a5f48505 | 2403 | } |
8b0c3377 DM |
2404 | |
2405 | assert(tmps_base <= PL_tmps_max); | |
2406 | PL_tmps_stack[tmps_base++] = rsv; | |
2407 | } | |
2408 | } | |
2409 | ||
2410 | if (SvRMAGICAL(ary) || AvFILLp(ary) >= 0) /* may be non-empty */ | |
2411 | av_clear(ary); | |
2412 | ||
2413 | /* store in the array, the SVs that are in the tmps stack */ | |
2414 | ||
2415 | tmps_base -= nelems; | |
2416 | ||
80c1439f | 2417 | if (SvMAGICAL(ary) || SvREADONLY(ary) || !AvREAL(ary)) { |
8b0c3377 DM |
2418 | /* for arrays we can't cheat with, use the official API */ |
2419 | av_extend(ary, nelems - 1); | |
2420 | for (i = 0; i < nelems; i++) { | |
2421 | SV **svp = &(PL_tmps_stack[tmps_base + i]); | |
2422 | SV *rsv = *svp; | |
2423 | /* A tied store won't take ownership of rsv, so keep | |
2424 | * the 1 refcnt on the tmps stack; otherwise disarm | |
2425 | * the tmps stack entry */ | |
2426 | if (av_store(ary, i, rsv)) | |
2427 | *svp = &PL_sv_undef; | |
2428 | /* av_store() may have added set magic to rsv */; | |
2429 | SvSETMAGIC(rsv); | |
2430 | } | |
2431 | /* disarm ary refcount: see comments below about leak */ | |
2432 | PL_tmps_stack[tmps_base - 1] = &PL_sv_undef; | |
2433 | } | |
2434 | else { | |
2435 | /* directly access/set the guts of the AV */ | |
2436 | SSize_t fill = nelems - 1; | |
2437 | if (fill > AvMAX(ary)) | |
2438 | av_extend_guts(ary, fill, &AvMAX(ary), &AvALLOC(ary), | |
2439 | &AvARRAY(ary)); | |
2440 | AvFILLp(ary) = fill; | |
2441 | Copy(&(PL_tmps_stack[tmps_base]), AvARRAY(ary), nelems, SV*); | |
2442 | /* Quietly remove all the SVs from the tmps stack slots, | |
2443 | * since ary has now taken ownership of the refcnt. | |
2444 | * Also remove ary: which will now leak if we die before | |
2445 | * the SvREFCNT_dec_NN(ary) below */ | |
2446 | if (UNLIKELY(PL_tmps_ix >= tmps_base + nelems)) | |
2447 | Move(&PL_tmps_stack[tmps_base + nelems], | |
2448 | &PL_tmps_stack[tmps_base - 1], | |
2449 | PL_tmps_ix - (tmps_base + nelems) + 1, | |
2450 | SV*); | |
2451 | PL_tmps_ix -= (nelems + 1); | |
2452 | } | |
2453 | ||
5d9574c1 | 2454 | if (UNLIKELY(PL_delaymagic & DM_ARRAY_ISA)) |
8b0c3377 | 2455 | /* its assumed @ISA set magic can't die and leak ary */ |
ad64d0ec | 2456 | SvSETMAGIC(MUTABLE_SV(ary)); |
8b0c3377 DM |
2457 | SvREFCNT_dec_NN(ary); |
2458 | ||
2459 | relem = lastrelem + 1; | |
2460 | goto no_relems; | |
a5f48505 DM |
2461 | } |
2462 | ||
10c8fecd | 2463 | case SVt_PVHV: { /* normal hash */ |
8b0c3377 DM |
2464 | |
2465 | SV **svp; | |
2466 | bool dirty_tmps; | |
2467 | SSize_t i; | |
2468 | SSize_t tmps_base; | |
2469 | SSize_t nelems = lastrelem - relem + 1; | |
b09ed995 | 2470 | HV *hash = MUTABLE_HV(lsv); |
8b0c3377 DM |
2471 | |
2472 | if (UNLIKELY(nelems & 1)) { | |
2473 | do_oddball(lastrelem, relem); | |
2474 | /* we have firstlelem to reuse, it's not needed any more */ | |
2475 | *++lastrelem = &PL_sv_undef; | |
2476 | nelems++; | |
2477 | } | |
2478 | ||
2479 | /* See the SVt_PVAV branch above for a long description of | |
2480 | * how the following all works. The main difference for hashes | |
2481 | * is that we treat keys and values separately (and have | |
2482 | * separate loops for them): as for arrays, values are always | |
2483 | * copied (except for the SvTEMP optimisation), since they | |
2484 | * need to be stored in the hash; while keys are only | |
2485 | * processed where they might get prematurely freed or | |
2486 | * whatever. */ | |
2487 | ||
2488 | /* tmps stack slots: | |
2489 | * * reserve a slot for the hash keepalive; | |
2490 | * * reserve slots for the hash values we're about to copy; | |
2491 | * * preallocate for the keys we'll possibly copy or refcount bump | |
2492 | * later; | |
2493 | * then protect hash and temporarily void the remaining | |
2494 | * value slots with &PL_sv_undef */ | |
2495 | EXTEND_MORTAL(nelems + 1); | |
2496 | ||
2497 | /* convert to number of key/value pairs */ | |
2498 | nelems >>= 1; | |
2499 | ||
2500 | PL_tmps_stack[++PL_tmps_ix] = SvREFCNT_inc_simple_NN(hash); | |
2501 | tmps_base = PL_tmps_ix + 1; | |
2502 | for (i = 0; i < nelems; i++) | |
2503 | PL_tmps_stack[tmps_base + i] = &PL_sv_undef; | |
2504 | PL_tmps_ix += nelems; | |
2505 | ||
2506 | /* Make a copy of each RHS hash value and save on the tmps_stack | |
2507 | * (or pass through where we can optimise away the copy) */ | |
2508 | ||
2509 | for (svp = relem + 1; svp <= lastrelem; svp += 2) { | |
2510 | SV *rsv = *svp; | |
2511 | ||
2512 | if (SvTEMP(rsv) && !SvGMAGICAL(rsv) && SvREFCNT(rsv) == 1) { | |
2513 | /* can skip the copy */ | |
2514 | SvREFCNT_inc_simple_void_NN(rsv); | |
2515 | SvTEMP_off(rsv); | |
2516 | } | |
2517 | else { | |
2518 | SV *nsv; | |
2519 | /* do get before newSV, in case it dies and leaks */ | |
2520 | SvGETMAGIC(rsv); | |
2521 | nsv = newSV(0); | |
2522 | /* see comment in S_aassign_copy_common about | |
2523 | * SV_NOSTEAL */ | |
2524 | sv_setsv_flags(nsv, rsv, | |
2525 | (SV_DO_COW_SVSETSV|SV_NOSTEAL)); | |
2526 | rsv = *svp = nsv; | |
1c4ea384 RZ |
2527 | } |
2528 | ||
8b0c3377 DM |
2529 | assert(tmps_base <= PL_tmps_max); |
2530 | PL_tmps_stack[tmps_base++] = rsv; | |
2531 | } | |
2532 | tmps_base -= nelems; | |
a5f48505 | 2533 | |
a5f48505 | 2534 | |
8b0c3377 DM |
2535 | /* possibly protect keys */ |
2536 | ||
2537 | if (UNLIKELY(gimme == G_ARRAY)) { | |
2538 | /* handle e.g. | |
2539 | * @a = ((%h = ($$r, 1)), $r = "x"); | |
2540 | * $_++ for %h = (1,2,3,4); | |
2541 | */ | |
2542 | EXTEND_MORTAL(nelems); | |
2543 | for (svp = relem; svp <= lastrelem; svp += 2) | |
2544 | *svp = sv_mortalcopy_flags(*svp, | |
2545 | SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL); | |
2546 | } | |
2547 | else if (PL_op->op_private & OPpASSIGN_COMMON_AGG) { | |
2548 | /* for possible commonality, e.g. | |
2549 | * %h = ($h{a},1) | |
2550 | * avoid premature freeing RHS keys by mortalising | |
2551 | * them. | |
2552 | * For a magic element, make a copy so that its magic is | |
2553 | * called *before* the hash is emptied (which may affect | |
2554 | * a tied value for example). | |
2555 | * In theory we should check for magic keys in all | |
2556 | * cases, not just under OPpASSIGN_COMMON_AGG, but in | |
2557 | * practice, !OPpASSIGN_COMMON_AGG implies only | |
2558 | * constants or padtmps on the RHS. | |
2559 | */ | |
2560 | EXTEND_MORTAL(nelems); | |
2561 | for (svp = relem; svp <= lastrelem; svp += 2) { | |
2562 | SV *rsv = *svp; | |
2563 | if (UNLIKELY(SvGMAGICAL(rsv))) { | |
2564 | SSize_t n; | |
a5f48505 DM |
2565 | *svp = sv_mortalcopy_flags(*svp, |
2566 | SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL); | |
8b0c3377 DM |
2567 | /* allow other branch to continue pushing |
2568 | * onto tmps stack without checking each time */ | |
2569 | n = (lastrelem - relem) >> 1; | |
2570 | EXTEND_MORTAL(n); | |
a5f48505 | 2571 | } |
8b0c3377 DM |
2572 | else |
2573 | PL_tmps_stack[++PL_tmps_ix] = | |
2574 | SvREFCNT_inc_simple_NN(rsv); | |
a5f48505 | 2575 | } |
8b0c3377 | 2576 | } |
a5f48505 | 2577 | |
8b0c3377 DM |
2578 | if (SvRMAGICAL(hash) || HvUSEDKEYS(hash)) |
2579 | hv_clear(hash); | |
a5f48505 | 2580 | |
8b0c3377 DM |
2581 | /* now assign the keys and values to the hash */ |
2582 | ||
2583 | dirty_tmps = FALSE; | |
2584 | ||
2585 | if (UNLIKELY(gimme == G_ARRAY)) { | |
2586 | /* @a = (%h = (...)) etc */ | |
2587 | SV **svp; | |
2588 | SV **topelem = relem; | |
2589 | ||
2590 | for (i = 0, svp = relem; svp <= lastrelem; i++, svp++) { | |
2591 | SV *key = *svp++; | |
2592 | SV *val = *svp; | |
2593 | /* remove duplicates from list we return */ | |
2594 | if (!hv_exists_ent(hash, key, 0)) { | |
2595 | /* copy key back: possibly to an earlier | |
2596 | * stack location if we encountered dups earlier, | |
2597 | * The values will be updated later | |
2598 | */ | |
2599 | *topelem = key; | |
2600 | topelem += 2; | |
632b9d6f | 2601 | } |
8b0c3377 DM |
2602 | /* A tied store won't take ownership of val, so keep |
2603 | * the 1 refcnt on the tmps stack; otherwise disarm | |
2604 | * the tmps stack entry */ | |
2605 | if (hv_store_ent(hash, key, val, 0)) | |
2606 | PL_tmps_stack[tmps_base + i] = &PL_sv_undef; | |
2607 | else | |
2608 | dirty_tmps = TRUE; | |
2609 | /* hv_store_ent() may have added set magic to val */; | |
2610 | SvSETMAGIC(val); | |
2611 | } | |
2612 | if (topelem < svp) { | |
1c4ea384 RZ |
2613 | /* at this point we have removed the duplicate key/value |
2614 | * pairs from the stack, but the remaining values may be | |
2615 | * wrong; i.e. with (a 1 a 2 b 3) on the stack we've removed | |
2616 | * the (a 2), but the stack now probably contains | |
2617 | * (a <freed> b 3), because { hv_save(a,1); hv_save(a,2) } | |
2618 | * obliterates the earlier key. So refresh all values. */ | |
8b0c3377 DM |
2619 | lastrelem = topelem - 1; |
2620 | while (relem < lastrelem) { | |
1c4ea384 RZ |
2621 | HE *he; |
2622 | he = hv_fetch_ent(hash, *relem++, 0, 0); | |
2623 | *relem++ = (he ? HeVAL(he) : &PL_sv_undef); | |
2624 | } | |
2625 | } | |
8b0c3377 DM |
2626 | } |
2627 | else { | |
2628 | SV **svp; | |
2629 | for (i = 0, svp = relem; svp <= lastrelem; i++, svp++) { | |
2630 | SV *key = *svp++; | |
2631 | SV *val = *svp; | |
2632 | if (hv_store_ent(hash, key, val, 0)) | |
2633 | PL_tmps_stack[tmps_base + i] = &PL_sv_undef; | |
2634 | else | |
2635 | dirty_tmps = TRUE; | |
2636 | /* hv_store_ent() may have added set magic to val */; | |
2637 | SvSETMAGIC(val); | |
2638 | } | |
2639 | } | |
2640 | ||
2641 | if (dirty_tmps) { | |
2642 | /* there are still some 'live' recounts on the tmps stack | |
2643 | * - usually caused by storing into a tied hash. So let | |
2644 | * free_tmps() do the proper but slow job later. | |
2645 | * Just disarm hash refcount: see comments below about leak | |
2646 | */ | |
2647 | PL_tmps_stack[tmps_base - 1] = &PL_sv_undef; | |
2648 | } | |
2649 | else { | |
2650 | /* Quietly remove all the SVs from the tmps stack slots, | |
2651 | * since hash has now taken ownership of the refcnt. | |
2652 | * Also remove hash: which will now leak if we die before | |
2653 | * the SvREFCNT_dec_NN(hash) below */ | |
2654 | if (UNLIKELY(PL_tmps_ix >= tmps_base + nelems)) | |
2655 | Move(&PL_tmps_stack[tmps_base + nelems], | |
2656 | &PL_tmps_stack[tmps_base - 1], | |
2657 | PL_tmps_ix - (tmps_base + nelems) + 1, | |
2658 | SV*); | |
2659 | PL_tmps_ix -= (nelems + 1); | |
2660 | } | |
2661 | ||
2662 | SvREFCNT_dec_NN(hash); | |
2663 | ||
2664 | relem = lastrelem + 1; | |
2665 | goto no_relems; | |
2666 | } | |
2667 | ||
a0d0e21e | 2668 | default: |
8b0c3377 | 2669 | if (!SvIMMORTAL(lsv)) { |
d24e3eb1 DM |
2670 | SV *ref; |
2671 | ||
8b0c3377 DM |
2672 | if (UNLIKELY( |
2673 | SvTEMP(lsv) && !SvSMAGICAL(lsv) && SvREFCNT(lsv) == 1 && | |
2674 | (!isGV_with_GP(lsv) || SvFAKE(lsv)) && ckWARN(WARN_MISC) | |
2675 | )) | |
2676 | Perl_warner(aTHX_ | |
2677 | packWARN(WARN_MISC), | |
2678 | "Useless assignment to a temporary" | |
2679 | ); | |
d24e3eb1 DM |
2680 | |
2681 | /* avoid freeing $$lsv if it might be needed for further | |
2682 | * elements, e.g. ($ref, $foo) = (1, $$ref) */ | |
2683 | if ( SvROK(lsv) | |
2684 | && ( ((ref = SvRV(lsv)), SvREFCNT(ref)) == 1) | |
2685 | && lelem <= lastlelem | |
2686 | ) { | |
2687 | SSize_t ix; | |
2688 | SvREFCNT_inc_simple_void_NN(ref); | |
2689 | /* an unrolled sv_2mortal */ | |
2690 | ix = ++PL_tmps_ix; | |
2691 | if (UNLIKELY(ix >= PL_tmps_max)) | |
2692 | /* speculatively grow enough to cover other | |
2693 | * possible refs */ | |
67c3640a | 2694 | (void)tmps_grow_p(ix + (lastlelem - lelem)); |
d24e3eb1 DM |
2695 | PL_tmps_stack[ix] = ref; |
2696 | } | |
2697 | ||
8b0c3377 DM |
2698 | sv_setsv(lsv, *relem); |
2699 | *relem = lsv; | |
2700 | SvSETMAGIC(lsv); | |
2701 | } | |
2702 | if (++relem > lastrelem) | |
2703 | goto no_relems; | |
a0d0e21e | 2704 | break; |
8b0c3377 DM |
2705 | } /* switch */ |
2706 | } /* while */ | |
2707 | ||
2708 | ||
2709 | no_relems: | |
2710 | ||
2711 | /* simplified lelem loop for when there are no relems left */ | |
2712 | while (LIKELY(lelem <= lastlelem)) { | |
2713 | SV *lsv = *lelem++; | |
c73f612f DM |
2714 | |
2715 | TAINT_NOT; /* Each item stands on its own, taintwise. */ | |
2716 | ||
8b0c3377 DM |
2717 | if (UNLIKELY(!lsv)) { |
2718 | lsv = *lelem++; | |
2719 | ASSUME(SvTYPE(lsv) == SVt_PVAV); | |
a0d0e21e | 2720 | } |
8b0c3377 DM |
2721 | |
2722 | switch (SvTYPE(lsv)) { | |
2723 | case SVt_PVAV: | |
b09ed995 DM |
2724 | if (SvRMAGICAL(lsv) || AvFILLp((SV*)lsv) >= 0) { |
2725 | av_clear((AV*)lsv); | |
8b0c3377 | 2726 | if (UNLIKELY(PL_delaymagic & DM_ARRAY_ISA)) |
b09ed995 | 2727 | SvSETMAGIC(lsv); |
8b0c3377 DM |
2728 | } |
2729 | break; | |
2730 | ||
2731 | case SVt_PVHV: | |
b09ed995 DM |
2732 | if (SvRMAGICAL(lsv) || HvUSEDKEYS((HV*)lsv)) |
2733 | hv_clear((HV*)lsv); | |
8b0c3377 DM |
2734 | break; |
2735 | ||
2736 | default: | |
2737 | if (!SvIMMORTAL(lsv)) { | |
e03e82a0 | 2738 | sv_set_undef(lsv); |
8b0c3377 | 2739 | SvSETMAGIC(lsv); |
b09ed995 | 2740 | *relem++ = lsv; |
8b0c3377 DM |
2741 | } |
2742 | break; | |
2743 | } /* switch */ | |
2744 | } /* while */ | |
2745 | ||
c73f612f DM |
2746 | TAINT_NOT; /* result of list assign isn't tainted */ |
2747 | ||
5d9574c1 | 2748 | if (UNLIKELY(PL_delaymagic & ~DM_DELAY)) { |
985213f2 | 2749 | /* Will be used to set PL_tainting below */ |
dfff4baf BF |
2750 | Uid_t tmp_uid = PerlProc_getuid(); |
2751 | Uid_t tmp_euid = PerlProc_geteuid(); | |
2752 | Gid_t tmp_gid = PerlProc_getgid(); | |
2753 | Gid_t tmp_egid = PerlProc_getegid(); | |
985213f2 | 2754 | |
b469f1e0 | 2755 | /* XXX $> et al currently silently ignore failures */ |
3280af22 | 2756 | if (PL_delaymagic & DM_UID) { |
a0d0e21e | 2757 | #ifdef HAS_SETRESUID |
b469f1e0 JH |
2758 | PERL_UNUSED_RESULT( |
2759 | setresuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, | |
2760 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1, | |
2761 | (Uid_t)-1)); | |
d1a21e44 | 2762 | #elif defined(HAS_SETREUID) |
b469f1e0 JH |
2763 | PERL_UNUSED_RESULT( |
2764 | setreuid((PL_delaymagic & DM_RUID) ? PL_delaymagic_uid : (Uid_t)-1, | |
2765 | (PL_delaymagic & DM_EUID) ? PL_delaymagic_euid : (Uid_t)-1)); | |
d1a21e44 | 2766 | #else |
56febc5e | 2767 | # ifdef HAS_SETRUID |
b28d0864 | 2768 | if ((PL_delaymagic & DM_UID) == DM_RUID) { |
b469f1e0 | 2769 | PERL_UNUSED_RESULT(setruid(PL_delaymagic_uid)); |
b28d0864 | 2770 | PL_delaymagic &= ~DM_RUID; |
a0d0e21e | 2771 | } |
56febc5e AD |
2772 | # endif /* HAS_SETRUID */ |
2773 | # ifdef HAS_SETEUID | |
b28d0864 | 2774 | if ((PL_delaymagic & DM_UID) == DM_EUID) { |
b469f1e0 | 2775 | PERL_UNUSED_RESULT(seteuid(PL_delaymagic_euid)); |
b28d0864 | 2776 | PL_delaymagic &= ~DM_EUID; |
a0d0e21e | 2777 | } |
56febc5e | 2778 | # endif /* HAS_SETEUID */ |
b28d0864 | 2779 | if (PL_delaymagic & DM_UID) { |
985213f2 | 2780 | if (PL_delaymagic_uid != PL_delaymagic_euid) |
cea2e8a9 | 2781 | DIE(aTHX_ "No setreuid available"); |
b469f1e0 | 2782 | PERL_UNUSED_RESULT(PerlProc_setuid(PL_delaymagic_uid)); |
a0d0e21e | 2783 | } |
56febc5e | 2784 | #endif /* HAS_SETRESUID */ |
04783dc7 | 2785 | |
985213f2 AB |
2786 | tmp_uid = PerlProc_getuid(); |
2787 | tmp_euid = PerlProc_geteuid(); | |
a0d0e21e | 2788 | } |
b469f1e0 | 2789 | /* XXX $> et al currently silently ignore failures */ |
3280af22 | 2790 | if (PL_delaymagic & DM_GID) { |
a0d0e21e | 2791 | #ifdef HAS_SETRESGID |
b469f1e0 JH |
2792 | PERL_UNUSED_RESULT( |
2793 | setresgid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, | |
2794 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1, | |
2795 | (Gid_t)-1)); | |
d1a21e44 | 2796 | #elif defined(HAS_SETREGID) |
b469f1e0 JH |
2797 | PERL_UNUSED_RESULT( |
2798 | setregid((PL_delaymagic & DM_RGID) ? PL_delaymagic_gid : (Gid_t)-1, | |
2799 | (PL_delaymagic & DM_EGID) ? PL_delaymagic_egid : (Gid_t)-1)); | |
d1a21e44 | 2800 | #else |
56febc5e | 2801 | # ifdef HAS_SETRGID |
b28d0864 | 2802 | if ((PL_delaymagic & DM_GID) == DM_RGID) { |
b469f1e0 | 2803 | PERL_UNUSED_RESULT(setrgid(PL_delaymagic_gid)); |
b28d0864 | 2804 | PL_delaymagic &= ~DM_RGID; |
a0d0e21e | 2805 | } |
56febc5e AD |
2806 | # endif /* HAS_SETRGID */ |
2807 | # ifdef HAS_SETEGID | |
b28d0864 | 2808 | if ((PL_delaymagic & DM_GID) == DM_EGID) { |
b469f1e0 | 2809 | PERL_UNUSED_RESULT(setegid(PL_delaymagic_egid)); |
b28d0864 | 2810 | PL_delaymagic &= ~DM_EGID; |
a0d0e21e | 2811 | } |
56febc5e | 2812 | # endif /* HAS_SETEGID */ |
b28d0864 | 2813 | if (PL_delaymagic & DM_GID) { |
985213f2 | 2814 | if (PL_delaymagic_gid != PL_delaymagic_egid) |
cea2e8a9 | 2815 | DIE(aTHX_ "No setregid available"); |
b469f1e0 | 2816 | PERL_UNUSED_RESULT(PerlProc_setgid(PL_delaymagic_gid)); |
a0d0e21e | 2817 | } |
56febc5e | 2818 | #endif /* HAS_SETRESGID */ |
04783dc7 | 2819 | |
985213f2 AB |
2820 | tmp_gid = PerlProc_getgid(); |
2821 | tmp_egid = PerlProc_getegid(); | |
a0d0e21e | 2822 | } |
284167a5 | 2823 | TAINTING_set( TAINTING_get | (tmp_uid && (tmp_euid != tmp_uid || tmp_egid != tmp_gid)) ); |
9a9b5ec9 DM |
2824 | #ifdef NO_TAINT_SUPPORT |
2825 | PERL_UNUSED_VAR(tmp_uid); | |
2826 | PERL_UNUSED_VAR(tmp_euid); | |
2827 | PERL_UNUSED_VAR(tmp_gid); | |
2828 | PERL_UNUSED_VAR(tmp_egid); | |
2829 | #endif | |
a0d0e21e | 2830 | } |
a68090fe | 2831 | PL_delaymagic = old_delaymagic; |
54310121 | 2832 | |
54310121 | 2833 | if (gimme == G_VOID) |
2834 | SP = firstrelem - 1; | |
2835 | else if (gimme == G_SCALAR) { | |
54310121 | 2836 | SP = firstrelem; |
b09ed995 | 2837 | EXTEND(SP,1); |
7b394f12 DM |
2838 | if (PL_op->op_private & OPpASSIGN_TRUEBOOL) |
2839 | SETs((firstlelem - firstrelem) ? &PL_sv_yes : &PL_sv_zero); | |
2840 | else { | |
2841 | dTARGET; | |
2842 | SETi(firstlelem - firstrelem); | |
2843 | } | |
54310121 | 2844 | } |
b09ed995 DM |
2845 | else |
2846 | SP = relem - 1; | |
08aeb9f7 | 2847 | |
54310121 | 2848 | RETURN; |
a0d0e21e LW |
2849 | } |
2850 | ||
8782bef2 GB |
2851 | PP(pp_qr) |
2852 | { | |
20b7effb | 2853 | dSP; |
eb578fdb | 2854 | PMOP * const pm = cPMOP; |
fe578d7f | 2855 | REGEXP * rx = PM_GETRE(pm); |
196a02af DM |
2856 | regexp *prog = ReANY(rx); |
2857 | SV * const pkg = RXp_ENGINE(prog)->qr_package(aTHX_ (rx)); | |
c4420975 | 2858 | SV * const rv = sv_newmortal(); |
d63c20f2 DM |
2859 | CV **cvp; |
2860 | CV *cv; | |
288b8c02 NC |
2861 | |
2862 | SvUPGRADE(rv, SVt_IV); | |
c2123ae3 NC |
2863 | /* For a subroutine describing itself as "This is a hacky workaround" I'm |
2864 | loathe to use it here, but it seems to be the right fix. Or close. | |
2865 | The key part appears to be that it's essential for pp_qr to return a new | |
2866 | object (SV), which implies that there needs to be an effective way to | |
2867 | generate a new SV from the existing SV that is pre-compiled in the | |
2868 | optree. */ | |
2869 | SvRV_set(rv, MUTABLE_SV(reg_temp_copy(NULL, rx))); | |
288b8c02 NC |
2870 | SvROK_on(rv); |
2871 | ||
8d919b0a | 2872 | cvp = &( ReANY((REGEXP *)SvRV(rv))->qr_anoncv); |
5d9574c1 | 2873 | if (UNLIKELY((cv = *cvp) && CvCLONE(*cvp))) { |
d63c20f2 | 2874 | *cvp = cv_clone(cv); |
fc2b2dca | 2875 | SvREFCNT_dec_NN(cv); |
d63c20f2 DM |
2876 | } |
2877 | ||
288b8c02 | 2878 | if (pkg) { |
f815daf2 | 2879 | HV *const stash = gv_stashsv(pkg, GV_ADD); |
fc2b2dca | 2880 | SvREFCNT_dec_NN(pkg); |
288b8c02 NC |
2881 | (void)sv_bless(rv, stash); |
2882 | } | |
2883 | ||
196a02af | 2884 | if (UNLIKELY(RXp_ISTAINTED(prog))) { |
e08e52cf | 2885 | SvTAINTED_on(rv); |
9274aefd DM |
2886 | SvTAINTED_on(SvRV(rv)); |
2887 | } | |
c8c13c22 JB |
2888 | XPUSHs(rv); |
2889 | RETURN; | |
8782bef2 GB |
2890 | } |
2891 | ||
a0d0e21e LW |
2892 | PP(pp_match) |
2893 | { | |
20b7effb | 2894 | dSP; dTARG; |
eb578fdb | 2895 | PMOP *pm = cPMOP; |
d65afb4b | 2896 | PMOP *dynpm = pm; |
eb578fdb | 2897 | const char *s; |
5c144d81 | 2898 | const char *strend; |
99a90e59 | 2899 | SSize_t curpos = 0; /* initial pos() or current $+[0] */ |
a0d0e21e | 2900 | I32 global; |
7fadf4a7 | 2901 | U8 r_flags = 0; |
5c144d81 | 2902 | const char *truebase; /* Start of string */ |
eb578fdb | 2903 | REGEXP *rx = PM_GETRE(pm); |
196a02af | 2904 | regexp *prog = ReANY(rx); |
b3eb6a9b | 2905 | bool rxtainted; |
1c23e2bd | 2906 | const U8 gimme = GIMME_V; |
a0d0e21e | 2907 | STRLEN len; |
a3b680e6 | 2908 | const I32 oldsave = PL_savestack_ix; |
e60df1fa | 2909 | I32 had_zerolen = 0; |
b1422d62 | 2910 | MAGIC *mg = NULL; |
a0d0e21e | 2911 | |
533c011a | 2912 | if (PL_op->op_flags & OPf_STACKED) |
a0d0e21e LW |
2913 | TARG = POPs; |
2914 | else { | |
9399c607 DM |
2915 | if (ARGTARG) |
2916 | GETTARGET; | |
2917 | else { | |
2918 | TARG = DEFSV; | |
2919 | } | |
a0d0e21e LW |
2920 | EXTEND(SP,1); |
2921 | } | |
d9f424b2 | 2922 | |
c277df42 | 2923 | PUTBACK; /* EVAL blocks need stack_sp. */ |
69dc4b30 FC |
2924 | /* Skip get-magic if this is a qr// clone, because regcomp has |
2925 | already done it. */ | |
196a02af | 2926 | truebase = prog->mother_re |
69dc4b30 FC |
2927 | ? SvPV_nomg_const(TARG, len) |
2928 | : SvPV_const(TARG, len); | |
f1d31338 | 2929 | if (!truebase) |
2269b42e | 2930 | DIE(aTHX_ "panic: pp_match"); |
f1d31338 | 2931 | strend = truebase + len; |
196a02af | 2932 | rxtainted = (RXp_ISTAINTED(prog) || |
284167a5 | 2933 | (TAINT_get && (pm->op_pmflags & PMf_RETAINT))); |
9212bbba | 2934 | TAINT_NOT; |
a0d0e21e | 2935 | |
6c864ec2 | 2936 | /* We need to know this in case we fail out early - pos() must be reset */ |
de0df3c0 MH |
2937 | global = dynpm->op_pmflags & PMf_GLOBAL; |
2938 | ||
d65afb4b | 2939 | /* PMdf_USED is set after a ?? matches once */ |
c737faaf YO |
2940 | if ( |
2941 | #ifdef USE_ITHREADS | |
2942 | SvREADONLY(PL_regex_pad[pm->op_pmoffset]) | |
2943 | #else | |
2944 | pm->op_pmflags & PMf_USED | |
2945 | #endif | |
2946 | ) { | |
e5dc5375 | 2947 | DEBUG_r(PerlIO_printf(Perl_debug_log, "?? already matched once")); |
de0df3c0 | 2948 | goto nope; |
a0d0e21e LW |
2949 | } |
2950 | ||
5585e758 | 2951 | /* handle the empty pattern */ |
196a02af | 2952 | if (!RX_PRELEN(rx) && PL_curpm && !prog->mother_re) { |
5585e758 YO |
2953 | if (PL_curpm == PL_reg_curpm) { |
2954 | if (PL_curpm_under) { | |
2955 | if (PL_curpm_under == PL_reg_curpm) { | |
2956 | Perl_croak(aTHX_ "Infinite recursion via empty pattern"); | |
2957 | } else { | |
2958 | pm = PL_curpm_under; | |
2959 | } | |
2960 | } | |
2961 | } else { | |
2962 | pm = PL_curpm; | |
2963 | } | |
2964 | rx = PM_GETRE(pm); | |
196a02af | 2965 | prog = ReANY(rx); |
a0d0e21e | 2966 | } |
d65afb4b | 2967 | |
196a02af | 2968 | if (RXp_MINLEN(prog) >= 0 && (STRLEN)RXp_MINLEN(prog) > len) { |
75d43e96 | 2969 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String shorter than min possible regex match (%" |
147e3846 | 2970 | UVuf " < %" IVdf ")\n", |
196a02af | 2971 | (UV)len, (IV)RXp_MINLEN(prog))); |
de0df3c0 | 2972 | goto nope; |
e5dc5375 | 2973 | } |
c277df42 | 2974 | |
8ef97b0e | 2975 | /* get pos() if //g */ |
de0df3c0 | 2976 | if (global) { |
b1422d62 | 2977 | mg = mg_find_mglob(TARG); |
8ef97b0e | 2978 | if (mg && mg->mg_len >= 0) { |
25fdce4a | 2979 | curpos = MgBYTEPOS(mg, TARG, truebase, len); |
8ef97b0e DM |
2980 | /* last time pos() was set, it was zero-length match */ |
2981 | if (mg->mg_flags & MGf_MINMATCH) | |
2982 | had_zerolen = 1; | |
2983 | } | |
a0d0e21e | 2984 | } |
8ef97b0e | 2985 | |
6e240d0b | 2986 | #ifdef PERL_SAWAMPERSAND |
196a02af | 2987 | if ( RXp_NPARENS(prog) |
6502e081 | 2988 | || PL_sawampersand |
196a02af | 2989 | || (RXp_EXTFLAGS(prog) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
5b0e71e9 | 2990 | || (dynpm->op_pmflags & PMf_KEEPCOPY) |
6e240d0b FC |
2991 | ) |
2992 | #endif | |
2993 | { | |
6502e081 DM |
2994 | r_flags |= (REXEC_COPY_STR|REXEC_COPY_SKIP_PRE); |
2995 | /* in @a =~ /(.)/g, we iterate multiple times, but copy the buffer | |
2996 | * only on the first iteration. Therefore we need to copy $' as well | |
2997 | * as $&, to make the rest of the string available for captures in | |
2998 | * subsequent iterations */ | |
2999 | if (! (global && gimme == G_ARRAY)) | |
3000 | r_flags |= REXEC_COPY_SKIP_POST; | |
3001 | }; | |
5b0e71e9 DM |
3002 | #ifdef PERL_SAWAMPERSAND |
3003 | if (dynpm->op_pmflags & PMf_KEEPCOPY) | |
3004 | /* handle KEEPCOPY in pmop but not rx, eg $r=qr/a/; /$r/p */ | |
3005 | r_flags &= ~(REXEC_COPY_SKIP_PRE|REXEC_COPY_SKIP_POST); | |
3006 | #endif | |
22e551b9 | 3007 | |
f1d31338 DM |
3008 | s = truebase; |
3009 | ||
d7be1480 | 3010 | play_it_again: |
985afbc1 | 3011 | if (global) |
03c83e26 | 3012 | s = truebase + curpos; |
f722798b | 3013 | |
77da2310 | 3014 | if (!CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase, |
03c83e26 | 3015 | had_zerolen, TARG, NULL, r_flags)) |
03b6c93d | 3016 | goto nope; |
77da2310 NC |
3017 | |
3018 | PL_curpm = pm; | |
985afbc1 | 3019 | if (dynpm->op_pmflags & PMf_ONCE) |
c737faaf | 3020 | #ifdef USE_ITHREADS |
77da2310 | 3021 | SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]); |
c737faaf | 3022 | #else |
77da2310 | 3023 | dynpm->op_pmflags |= PMf_USED; |
c737faaf | 3024 | #endif |
a0d0e21e | 3025 | |
72311751 | 3026 | if (rxtainted) |
196a02af DM |
3027 | RXp_MATCH_TAINTED_on(prog); |
3028 | TAINT_IF(RXp_MATCH_TAINTED(prog)); | |
35c2ccc3 DM |
3029 | |
3030 | /* update pos */ | |
3031 | ||
3032 | if (global && (gimme != G_ARRAY || (dynpm->op_pmflags & PMf_CONTINUE))) { | |
b1422d62 | 3033 | if (!mg) |
35c2ccc3 | 3034 | mg = sv_magicext_mglob(TARG); |
196a02af DM |
3035 | MgBYTEPOS_set(mg, TARG, truebase, RXp_OFFS(prog)[0].end); |
3036 | if (RXp_ZERO_LEN(prog)) | |
adf51885 DM |
3037 | mg->mg_flags |= MGf_MINMATCH; |
3038 | else | |
3039 | mg->mg_flags &= ~MGf_MINMATCH; | |
35c2ccc3 DM |
3040 | } |
3041 | ||
196a02af | 3042 | if ((!RXp_NPARENS(prog) && !global) || gimme != G_ARRAY) { |
bf9dff51 DM |
3043 | LEAVE_SCOPE(oldsave); |
3044 | RETPUSHYES; | |
3045 | } | |
3046 | ||
88ab22af DM |
3047 | /* push captures on stack */ |
3048 | ||
bf9dff51 | 3049 | { |
196a02af | 3050 | const I32 nparens = RXp_NPARENS(prog); |
a3b680e6 | 3051 | I32 i = (global && !nparens) ? 1 : 0; |
a0d0e21e | 3052 | |
c277df42 | 3053 | SPAGAIN; /* EVAL blocks could move the stack. */ |
ffc61ed2 JH |
3054 | EXTEND(SP, nparens + i); |
3055 | EXTEND_MORTAL(nparens + i); | |
3056 | for (i = !i; i <= nparens; i++) { | |
a0d0e21e | 3057 | PUSHs(sv_newmortal()); |
196a02af DM |
3058 | if (LIKELY((RXp_OFFS(prog)[i].start != -1) |
3059 | && RXp_OFFS(prog)[i].end != -1 )) | |
5d9574c1 | 3060 | { |
196a02af DM |
3061 | const I32 len = RXp_OFFS(prog)[i].end - RXp_OFFS(prog)[i].start; |
3062 | const char * const s = RXp_OFFS(prog)[i].start + truebase; | |
3063 | if (UNLIKELY( RXp_OFFS(prog)[i].end < 0 | |
3064 | || RXp_OFFS(prog)[i].start < 0 | |
3065 | || len < 0 | |
3066 | || len > strend - s) | |
3067 | ) | |
5637ef5b | 3068 | DIE(aTHX_ "panic: pp_match start/end pointers, i=%ld, " |
147e3846 | 3069 | "start=%ld, end=%ld, s=%p, strend=%p, len=%" UVuf, |
196a02af DM |
3070 | (long) i, (long) RXp_OFFS(prog)[i].start, |
3071 | (long)RXp_OFFS(prog)[i].end, s, strend, (UV) len); | |
a0d0e21e | 3072 | sv_setpvn(*SP, s, len); |
cce850e4 | 3073 | if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len)) |
a197cbdd | 3074 | SvUTF8_on(*SP); |
a0d0e21e LW |
3075 | } |
3076 | } | |
3077 | if (global) { | |
196a02af DM |
3078 | curpos = (UV)RXp_OFFS(prog)[0].end; |
3079 | had_zerolen = RXp_ZERO_LEN(prog); | |
c277df42 | 3080 | PUTBACK; /* EVAL blocks may use stack */ |
cf93c79d | 3081 | r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST; |
a0d0e21e LW |
3082 | goto play_it_again; |
3083 | } | |
4633a7c4 | 3084 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
3085 | RETURN; |
3086 | } | |
e5964223 | 3087 | NOT_REACHED; /* NOTREACHED */ |
a0d0e21e | 3088 | |
7b52d656 | 3089 | nope: |
d65afb4b | 3090 | if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) { |
b1422d62 DM |
3091 | if (!mg) |
3092 | mg = mg_find_mglob(TARG); | |
3093 | if (mg) | |
3094 | mg->mg_len = -1; | |
a0d0e21e | 3095 | } |
4633a7c4 | 3096 | LEAVE_SCOPE(oldsave); |
a0d0e21e LW |
3097 | if (gimme == G_ARRAY) |
3098 | RETURN; | |
3099 | RETPUSHNO; | |
3100 | } | |
3101 | ||
3102 | OP * | |
864dbfa3 | 3103 | Perl_do_readline(pTHX) |
a0d0e21e | 3104 | { |
20b7effb | 3105 | dSP; dTARGETSTACKED; |
eb578fdb | 3106 | SV *sv; |
a0d0e21e LW |
3107 | STRLEN tmplen = 0; |
3108 | STRLEN offset; | |
760ac839 | 3109 | PerlIO *fp; |
eb578fdb KW |
3110 | IO * const io = GvIO(PL_last_in_gv); |
3111 | const I32 type = PL_op->op_type; | |
1c23e2bd | 3112 | const U8 gimme = GIMME_V; |
a0d0e21e | 3113 | |
6136c704 | 3114 | if (io) { |
50db69d8 | 3115 | const MAGIC *const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar); |
6136c704 | 3116 | if (mg) { |
3e0cb5de | 3117 | Perl_tied_method(aTHX_ SV_CONST(READLINE), SP, MUTABLE_SV(io), mg, gimme, 0); |
6136c704 | 3118 | if (gimme == G_SCALAR) { |
50db69d8 NC |
3119 | SPAGAIN; |
3120 | SvSetSV_nosteal(TARG, TOPs); | |
3121 | SETTARG; | |
6136c704 | 3122 | } |
50db69d8 | 3123 | return NORMAL; |
0b7c7b4f | 3124 | } |
e79b0511 | 3125 | } |
4608196e | 3126 | fp = NULL; |
a0d0e21e LW |
3127 | if (io) { |
3128 | fp = IoIFP(io); | |
3129 | if (!fp) { | |
3130 | if (IoFLAGS(io) & IOf_ARGV) { | |
3131 | if (IoFLAGS(io) & IOf_START) { | |
a0d0e21e | 3132 | IoLINES(io) = 0; |
b9f2b683 | 3133 | if (av_tindex(GvAVn(PL_last_in_gv)) < 0) { |
1d7c1841 | 3134 | IoFLAGS(io) &= ~IOf_START; |
d5eb9a46 | 3135 | do_open6(PL_last_in_gv, "-", 1, NULL, NULL, 0); |
4bac9ae4 | 3136 | SvTAINTED_off(GvSVn(PL_last_in_gv)); /* previous tainting irrelevant */ |
76f68e9b | 3137 | sv_setpvs(GvSVn(PL_last_in_gv), "-"); |
3280af22 | 3138 | SvSETMAGIC(GvSV(PL_last_in_gv)); |
a2008d6d GS |
3139 | fp = IoIFP(io); |
3140 | goto have_fp; | |
a0d0e21e LW |
3141 | } |
3142 | } | |
157fb5a1 | 3143 | fp = nextargv(PL_last_in_gv, PL_op->op_flags & OPf_SPECIAL); |
a0d0e21e | 3144 | if (!fp) { /* Note: fp != IoIFP(io) */ |
3280af22 | 3145 | (void)do_close(PL_last_in_gv, FALSE); /* now it does*/ |
a0d0e21e LW |
3146 | } |
3147 | } | |
0d44d22b NC |
3148 | else if (type == OP_GLOB) |
3149 | fp = Perl_start_glob(aTHX_ POPs, io); | |
a0d0e21e LW |
3150 | } |
3151 | else if (type == OP_GLOB) | |
3152 | SP--; | |
7716c5c5 | 3153 | else if (IoTYPE(io) == IoTYPE_WRONLY) { |
a5390457 | 3154 | report_wrongway_fh(PL_last_in_gv, '>'); |
a00b5bd3 | 3155 | } |
a0d0e21e LW |
3156 | } |
3157 | if (!fp) { | |
041457d9 | 3158 | if ((!io || !(IoFLAGS(io) & IOf_START)) |
de7dabb6 TC |
3159 | && ckWARN(WARN_CLOSED) |
3160 | && type != OP_GLOB) | |
041457d9 | 3161 | { |
de7dabb6 | 3162 | report_evil_fh(PL_last_in_gv); |
3f4520fe | 3163 | } |
54310121 | 3164 | if (gimme == G_SCALAR) { |
79628082 | 3165 | /* undef TARG, and push that undefined value */ |
ba92458f | 3166 | if (type != OP_RCATLINE) { |
3773545d | 3167 | sv_set_undef(TARG); |
ba92458f | 3168 | } |
a0d0e21e LW |
3169 | PUSHTARG; |
3170 | } | |
3171 | RETURN; | |
3172 | } | |
a2008d6d | 3173 | have_fp: |
54310121 | 3174 | if (gimme == G_SCALAR) { |
a0d0e21e | 3175 | sv = TARG; |
0f722b55 RGS |
3176 | if (type == OP_RCATLINE && SvGMAGICAL(sv)) |
3177 | mg_get(sv); | |
48de12d9 RGS |
3178 | if (SvROK(sv)) { |
3179 | if (type == OP_RCATLINE) | |
5668452f | 3180 | SvPV_force_nomg_nolen(sv); |
48de12d9 RGS |
3181 | else |
3182 | sv_unref(sv); | |
3183 | } | |
f7877b28 | 3184 | else if (isGV_with_GP(sv)) { |
5668452f | 3185 | SvPV_force_nomg_nolen(sv); |
f7877b28 | 3186 | } |
862a34c6 | 3187 | SvUPGRADE(sv, SVt_PV); |
a0d0e21e | 3188 | tmplen = SvLEN(sv); /* remember if already alloced */ |
e3918bb7 | 3189 | if (!tmplen && !SvREADONLY(sv) && !SvIsCOW(sv)) { |
f72e8700 JJ |
3190 | /* try short-buffering it. Please update t/op/readline.t |
3191 | * if you change the growth length. | |
3192 | */ | |
3193 | Sv_Grow(sv, 80); | |
3194 | } | |
2b5e58c4 AMS |
3195 | offset = 0; |
3196 | if (type == OP_RCATLINE && SvOK(sv)) { | |
3197 | if (!SvPOK(sv)) { | |
5668452f | 3198 | SvPV_force_nomg_nolen(sv); |
2b5e58c4 | 3199 | } |
a0d0e21e | 3200 | offset = SvCUR(sv); |
2b5e58c4 | 3201 | } |
a0d0e21e | 3202 | } |
54310121 | 3203 | else { |
561b68a9 | 3204 | sv = sv_2mortal(newSV(80)); |
54310121 | 3205 | offset = 0; |
3206 | } | |
fbad3eb5 | 3207 | |
3887d568 AP |
3208 | /* This should not be marked tainted if the fp is marked clean */ |
3209 | #define MAYBE_TAINT_LINE(io, sv) \ | |
3210 | if (!(IoFLAGS(io) & IOf_UNTAINT)) { \ | |
3211 | TAINT; \ | |
3212 | SvTAINTED_on(sv); \ | |
3213 | } | |
3214 | ||
684bef36 | 3215 | /* delay EOF state for a snarfed empty file */ |
fbad3eb5 | 3216 | #define SNARF_EOF(gimme,rs,io,sv) \ |
684bef36 | 3217 | (gimme != G_SCALAR || SvCUR(sv) \ |
b9fee9ba | 3218 | || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs)) |
fbad3eb5 | 3219 | |
a0d0e21e | 3220 | for (;;) { |
09e8efcc | 3221 | PUTBACK; |
fbad3eb5 | 3222 | if (!sv_gets(sv, fp, offset) |
2d726892 TF |
3223 | && (type == OP_GLOB |
3224 | || SNARF_EOF(gimme, PL_rs, io, sv) | |
3225 | || PerlIO_error(fp))) | |
fbad3eb5 | 3226 | { |
760ac839 | 3227 | PerlIO_clearerr(fp); |
a0d0e21e | 3228 | if (IoFLAGS(io) & IOf_ARGV) { |
157fb5a1 | 3229 | fp = nextargv(PL_last_in_gv, PL_op->op_flags & OPf_SPECIAL); |
a0d0e21e LW |
3230 | if (fp) |
3231 | continue; | |
3280af22 | 3232 | (void)do_close(PL_last_in_gv, FALSE); |
a0d0e21e LW |
3233 | } |
3234 | else if (type == OP_GLOB) { | |
a2a5de95 NC |
3235 | if (!do_close(PL_last_in_gv, FALSE)) { |
3236 | Perl_ck_warner(aTHX_ packWARN(WARN_GLOB), | |
3237 | "glob failed (child exited with status %d%s)", | |
3238 | (int)(STATUS_CURRENT >> 8), | |
3239 | (STATUS_CURRENT & 0x80) ? ", core dumped" : ""); | |
4eb79ab5 | 3240 | } |
a0d0e21e | 3241 | } |
54310121 | 3242 | if (gimme == G_SCALAR) { |
ba92458f AE |
3243 | if (type != OP_RCATLINE) { |
3244 | SV_CHECK_THINKFIRST_COW_DROP(TARG); | |
0c34ef67 | 3245 | SvOK_off(TARG); |
ba92458f | 3246 | } |
09e8efcc | 3247 | SPAGAIN; |
a0d0e21e LW |
3248 | PUSHTARG; |
3249 | } | |
3887d568 | 3250 | MAYBE_TAINT_LINE(io, sv); |
a0d0e21e LW |
3251 | RETURN; |
3252 | } | |
3887d568 | 3253 | MAYBE_TAINT_LINE(io, sv); |
a0d0e21e | 3254 | IoLINES(io)++; |
b9fee9ba | 3255 | IoFLAGS(io) |= IOf_NOLINE; |
71be2cbc | 3256 | SvSETMAGIC(sv); |
09e8efcc | 3257 | SPAGAIN; |
a0d0e21e | 3258 | XPUSHs(sv); |
a0d0e21e | 3259 | if (type == OP_GLOB) { |
349d4f2f | 3260 | const char *t1; |
45a23732 | 3261 | Stat_t statbuf; |
a0d0e21e | 3262 | |
3280af22 | 3263 | if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) { |
6136c704 | 3264 | char * const tmps = SvEND(sv) - 1; |
aa07b2f6 | 3265 | if (*tmps == *SvPVX_const(PL_rs)) { |
c07a80fd | 3266 | *tmps = '\0'; |
b162af07 | 3267 | SvCUR_set(sv, SvCUR(sv) - 1); |
c07a80fd | 3268 | } |
3269 | } | |
349d4f2f | 3270 | for (t1 = SvPVX_const(sv); *t1; t1++) |
b51c3e77 CB |
3271 | #ifdef __VMS |
3272 | if (strchr("*%?", *t1)) | |
3273 | #else | |
7ad1e72d | 3274 | if (strchr("$&*(){}[]'\";\\|?<>~`", *t1)) |
b51c3e77 | 3275 | #endif |
a0d0e21e | 3276 | break; |
45a23732 | 3277 | if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &statbuf) < 0) { |
a0d0e21e LW |
3278 | (void)POPs; /* Unmatched wildcard? Chuck it... */ |
3279 | continue; | |
3280 | } | |
2d79bf7f | 3281 | } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */ |
d4c19fe8 AL |
3282 | if (ckWARN(WARN_UTF8)) { |
3283 | const U8 * const s = (const U8*)SvPVX_const(sv) + offset; | |
3284 | const STRLEN len = SvCUR(sv) - offset; | |
3285 | const U8 *f; | |
3286 | ||
3287 | if (!is_utf8_string_loc(s, len, &f)) | |
3288 | /* Emulate :encoding(utf8) warning in the same case. */ | |
3289 | Perl_warner(aTHX_ packWARN(WARN_UTF8), | |
3290 | "utf8 \"\\x%02X\" does not map to Unicode", | |
3291 | f < (U8*)SvEND(sv) ? *f : 0); | |
3292 | } | |
a0d0e21e | 3293 | } |
54310121 | 3294 | if (gimme == G_ARRAY) { |
a0d0e21e | 3295 | if (SvLEN(sv) - SvCUR(sv) > 20) { |
1da4ca5f | 3296 | SvPV_shrink_to_cur(sv); |
a0d0e21e | 3297 | } |
561b68a9 | 3298 | sv = sv_2mortal(newSV(80)); |
a0d0e21e LW |
3299 | continue; |
3300 | } | |
54310121 | 3301 | else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) { |
a0d0e21e | 3302 | /* try to reclaim a bit of scalar space (only on 1st alloc) */ |
d5b5861b NC |
3303 | const STRLEN new_len |
3304 | = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */ | |
1da4ca5f | 3305 | SvPV_renew(sv, new_len); |
a0d0e21e LW |
3306 | } |
3307 | RETURN; | |
3308 | } | |
3309 | } | |
3310 | ||
a0d0e21e LW |
3311 | PP(pp_helem) |
3312 | { | |
20b7effb | 3313 | dSP; |
760ac839 | 3314 | HE* he; |
ae77835f | 3315 | SV **svp; |
c445ea15 | 3316 | SV * const keysv = POPs; |
85fbaab2 | 3317 | HV * const hv = MUTABLE_HV(POPs); |
a3b680e6 AL |
3318 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
3319 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
be6c24e0 | 3320 | SV *sv; |
92970b93 | 3321 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
d30e492c | 3322 | bool preeminent = TRUE; |
a0d0e21e | 3323 | |
6dfc73ea S |
3324 | if (SvTYPE(hv) != SVt_PVHV) |
3325 | RETPUSHUNDEF; | |
d4c19fe8 | 3326 | |
92970b93 | 3327 | if (localizing) { |
d4c19fe8 AL |
3328 | MAGIC *mg; |
3329 | HV *stash; | |
d30e492c VP |
3330 | |
3331 | /* If we can determine whether the element exist, | |
3332 | * Try to preserve the existenceness of a tied hash | |
3333 | * element by using EXISTS and DELETE if possible. | |
3334 | * Fallback to FETCH and STORE otherwise. */ | |
2c5f48c2 | 3335 | if (SvCANEXISTDELETE(hv)) |
d30e492c | 3336 | preeminent = hv_exists_ent(hv, keysv, 0); |
d4c19fe8 | 3337 | } |
d30e492c | 3338 | |
5f9d7e2b | 3339 | he = hv_fetch_ent(hv, keysv, lval && !defer, 0); |
d4c19fe8 | 3340 | svp = he ? &HeVAL(he) : NULL; |
a0d0e21e | 3341 | if (lval) { |
746f6409 | 3342 | if (!svp || !*svp || *svp == &PL_sv_undef) { |
68dc0745 | 3343 | SV* lv; |
3344 | SV* key2; | |
2d8e6c8d | 3345 | if (!defer) { |
be2597df | 3346 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); |
2d8e6c8d | 3347 | } |
68dc0745 | 3348 | lv = sv_newmortal(); |
3349 | sv_upgrade(lv, SVt_PVLV); | |
3350 | LvTYPE(lv) = 'y'; | |
6136c704 | 3351 | sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0); |
fc2b2dca | 3352 | SvREFCNT_dec_NN(key2); /* sv_magic() increments refcount */ |
0ad694a7 | 3353 | LvTARG(lv) = SvREFCNT_inc_simple_NN(hv); |
68dc0745 | 3354 | LvTARGLEN(lv) = 1; |
3355 | PUSHs(lv); | |
3356 | RETURN; | |
3357 | } | |
92970b93 | 3358 | if (localizing) { |
6881372e | 3359 | if (HvNAME_get(hv) && isGV_or_RVCV(*svp)) |
159b6efe | 3360 | save_gp(MUTABLE_GV(*svp), !(PL_op->op_flags & OPf_SPECIAL)); |
47cfc530 VP |
3361 | else if (preeminent) |
3362 | save_helem_flags(hv, keysv, svp, | |
3363 | (PL_op->op_flags & OPf_SPECIAL) ? 0 : SAVEf_SETMAGIC); | |
3364 | else | |
3365 | SAVEHDELETE(hv, keysv); | |
5f05dabc | 3366 | } |
9026059d GG |
3367 | else if (PL_op->op_private & OPpDEREF) { |
3368 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
3369 | RETURN; | |
3370 | } | |
a0d0e21e | 3371 | } |
746f6409 | 3372 | sv = (svp && *svp ? *svp : &PL_sv_undef); |
fd69380d DM |
3373 | /* Originally this did a conditional C<sv = sv_mortalcopy(sv)>; this |
3374 | * was to make C<local $tied{foo} = $tied{foo}> possible. | |
3375 | * However, it seems no longer to be needed for that purpose, and | |
3376 | * introduced a new bug: stuff like C<while ($hash{taintedval} =~ /.../g> | |
3377 | * would loop endlessly since the pos magic is getting set on the | |
3378 | * mortal copy and lost. However, the copy has the effect of | |
3379 | * triggering the get magic, and losing it altogether made things like | |
3380 | * c<$tied{foo};> in void context no longer do get magic, which some | |
3381 | * code relied on. Also, delayed triggering of magic on @+ and friends | |
3382 | * meant the original regex may be out of scope by now. So as a | |
3383 | * compromise, do the get magic here. (The MGf_GSKIP flag will stop it | |
3384 | * being called too many times). */ | |
39cf747a | 3385 | if (!lval && SvRMAGICAL(hv) && SvGMAGICAL(sv)) |
fd69380d | 3386 | mg_get(sv); |
be6c24e0 | 3387 | PUSHs(sv); |
a0d0e21e LW |
3388 | RETURN; |
3389 | } | |
3390 | ||
fedf30e1 DM |
3391 | |
3392 | /* a stripped-down version of Perl_softref2xv() for use by | |
3393 | * pp_multideref(), which doesn't use PL_op->op_flags */ | |
3394 | ||
f9db5646 | 3395 | STATIC GV * |
fedf30e1 DM |
3396 | S_softref2xv_lite(pTHX_ SV *const sv, const char *const what, |
3397 | const svtype type) | |
3398 | { | |
3399 | if (PL_op->op_private & HINT_STRICT_REFS) { | |
3400 | if (SvOK(sv)) | |
3401 | Perl_die(aTHX_ PL_no_symref_sv, sv, | |
3402 | (SvPOKp(sv) && SvCUR(sv)>32 ? "..." : ""), what); | |
3403 | else | |
3404 | Perl_die(aTHX_ PL_no_usym, what); | |
3405 | } | |
3406 | if (!SvOK(sv)) | |
3407 | Perl_die(aTHX_ PL_no_usym, what); | |
3408 | return gv_fetchsv_nomg(sv, GV_ADD, type); | |
3409 | } | |
3410 | ||
3411 | ||
79815f56 DM |
3412 | /* Handle one or more aggregate derefs and array/hash indexings, e.g. |
3413 | * $h->{foo} or $a[0]{$key}[$i] or f()->[1] | |
fedf30e1 DM |
3414 | * |
3415 | * op_aux points to an array of unions of UV / IV / SV* / PADOFFSET. | |
79815f56 DM |
3416 | * Each of these either contains a set of actions, or an argument, such as |
3417 | * an IV to use as an array index, or a lexical var to retrieve. | |
3418 | * Several actions re stored per UV; we keep shifting new actions off the | |
3419 | * one UV, and only reload when it becomes zero. | |
fedf30e1 DM |
3420 | */ |
3421 | ||
3422 | PP(pp_multideref) | |
3423 | { | |
3424 | SV *sv = NULL; /* init to avoid spurious 'may be used uninitialized' */ | |
3425 | UNOP_AUX_item *items = cUNOP_AUXx(PL_op)->op_aux; | |
3426 | UV actions = items->uv; | |
3427 | ||
3428 | assert(actions); | |
3429 | /* this tells find_uninit_var() where we're up to */ | |
3430 | PL_multideref_pc = items; | |
3431 | ||
3432 | while (1) { | |
3433 | /* there are three main classes of action; the first retrieve | |
3434 | * the initial AV or HV from a variable or the stack; the second | |
3435 | * does the equivalent of an unrolled (/DREFAV, rv2av, aelem), | |
3436 | * the third an unrolled (/DREFHV, rv2hv, helem). | |
3437 | */ | |
3438 | switch (actions & MDEREF_ACTION_MASK) { | |
3439 | ||
3440 | case MDEREF_reload: | |
3441 | actions = (++items)->uv; | |
3442 | continue; | |
3443 | ||
3444 | case MDEREF_AV_padav_aelem: /* $lex[...] */ | |
3445 | sv = PAD_SVl((++items)->pad_offset); | |
3446 | goto do_AV_aelem; | |
3447 | ||
3448 | case MDEREF_AV_gvav_aelem: /* $pkg[...] */ | |
3449 | sv = UNOP_AUX_item_sv(++items); | |
3450 | assert(isGV_with_GP(sv)); | |
3451 | sv = (SV*)GvAVn((GV*)sv); | |
3452 | goto do_AV_aelem; | |
3453 | ||
3454 | case MDEREF_AV_pop_rv2av_aelem: /* expr->[...] */ | |
3455 | { | |
3456 | dSP; | |
3457 | sv = POPs; | |
3458 | PUTBACK; | |
3459 | goto do_AV_rv2av_aelem; | |
3460 | } | |
3461 | ||
3462 | case MDEREF_AV_gvsv_vivify_rv2av_aelem: /* $pkg->[...] */ | |
3463 | sv = UNOP_AUX_item_sv(++items); | |
3464 | assert(isGV_with_GP(sv)); | |
3465 | sv = GvSVn((GV*)sv); | |
3466 | goto do_AV_vivify_rv2av_aelem; | |
3467 | ||
3468 | case MDEREF_AV_padsv_vivify_rv2av_aelem: /* $lex->[...] */ | |
3469 | sv = PAD_SVl((++items)->pad_offset); | |
3470 | /* FALLTHROUGH */ | |
3471 | ||
3472 | do_AV_vivify_rv2av_aelem: | |
3473 | case MDEREF_AV_vivify_rv2av_aelem: /* vivify, ->[...] */ | |
3474 | /* this is the OPpDEREF action normally found at the end of | |
3475 | * ops like aelem, helem, rv2sv */ | |
3476 | sv = vivify_ref(sv, OPpDEREF_AV); | |
3477 | /* FALLTHROUGH */ | |
3478 | ||
3479 | do_AV_rv2av_aelem: | |
3480 | /* this is basically a copy of pp_rv2av when it just has the | |
3481 | * sKR/1 flags */ | |
3482 | SvGETMAGIC(sv); | |
3483 | if (LIKELY(SvROK(sv))) { | |
3484 | if (UNLIKELY(SvAMAGIC(sv))) { | |
3485 | sv = amagic_deref_call(sv, to_av_amg); | |
3486 | } | |
3487 | sv = SvRV(sv); | |
3488 | if (UNLIKELY(SvTYPE(sv) != SVt_PVAV)) | |
3489 | DIE(aTHX_ "Not an ARRAY reference"); | |
3490 | } | |
3491 | else if (SvTYPE(sv) != SVt_PVAV) { | |
3492 | if (!isGV_with_GP(sv)) | |
3493 | sv = (SV*)S_softref2xv_lite(aTHX_ sv, "an ARRAY", SVt_PVAV); | |
3494 | sv = MUTABLE_SV(GvAVn((GV*)sv)); | |
3495 | } | |
3496 | /* FALLTHROUGH */ | |
3497 | ||
3498 | do_AV_aelem: | |
3499 | { | |
3500 | /* retrieve the key; this may be either a lexical or package | |
3501 | * var (whose index/ptr is stored as an item) or a signed | |
3502 | * integer constant stored as an item. | |
3503 | */ | |
3504 | SV *elemsv; | |
3505 | IV elem = 0; /* to shut up stupid compiler warnings */ | |
3506 | ||
3507 | ||
3508 | assert(SvTYPE(sv) == SVt_PVAV); | |
3509 | ||
3510 | switch (actions & MDEREF_INDEX_MASK) { | |
3511 | case MDEREF_INDEX_none: | |
3512 | goto finish; | |
3513 | case MDEREF_INDEX_const: | |
3514 | elem = (++items)->iv; | |
3515 | break; | |
3516 | case MDEREF_INDEX_padsv: | |
3517 | elemsv = PAD_SVl((++items)->pad_offset); | |
3518 | goto check_elem; | |
3519 | case MDEREF_INDEX_gvsv: | |
3520 | elemsv = UNOP_AUX_item_sv(++items); | |
3521 | assert(isGV_with_GP(elemsv)); | |
3522 | elemsv = GvSVn((GV*)elemsv); | |
3523 | check_elem: | |
3524 | if (UNLIKELY(SvROK(elemsv) && !SvGAMAGIC(elemsv) | |
3525 | && ckWARN(WARN_MISC))) | |
3526 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
147e3846 | 3527 | "Use of reference \"%" SVf "\" as array index", |
fedf30e1 DM |
3528 | SVfARG(elemsv)); |
3529 | /* the only time that S_find_uninit_var() needs this | |
3530 | * is to determine which index value triggered the | |
3531 | * undef warning. So just update it here. Note that | |
3532 | * since we don't save and restore this var (e.g. for | |
3533 | * tie or overload execution), its value will be | |
3534 | * meaningless apart from just here */ | |
3535 | PL_multideref_pc = items; | |
3536 | elem = SvIV(elemsv); | |
3537 | break; | |
3538 | } | |
3539 | ||
3540 | ||
3541 | /* this is basically a copy of pp_aelem with OPpDEREF skipped */ | |
3542 | ||
3543 | if (!(actions & MDEREF_FLAG_last)) { | |
3544 | SV** svp = av_fetch((AV*)sv, elem, 1); | |
3545 | if (!svp || ! (sv=*svp)) | |
3546 | DIE(aTHX_ PL_no_aelem, elem); | |
3547 | break; | |
3548 | } | |
3549 | ||
3550 | if (PL_op->op_private & | |
3551 | (OPpMULTIDEREF_EXISTS|OPpMULTIDEREF_DELETE)) | |
3552 | { | |
3553 | if (PL_op->op_private & OPpMULTIDEREF_EXISTS) { | |
3554 | sv = av_exists((AV*)sv, elem) ? &PL_sv_yes : &PL_sv_no; | |
3555 | } | |
3556 | else { | |
3557 | I32 discard = (GIMME_V == G_VOID) ? G_DISCARD : 0; | |
3558 | sv = av_delete((AV*)sv, elem, discard); | |
3559 | if (discard) | |
3560 | return NORMAL; | |
3561 | if (!sv) | |
3562 | sv = &PL_sv_undef; | |
3563 | } | |
3564 | } | |
3565 | else { | |
3566 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; | |
3567 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
3568 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; | |
3569 | bool preeminent = TRUE; | |
3570 | AV *const av = (AV*)sv; | |
3571 | SV** svp; | |
3572 | ||
3573 | if (UNLIKELY(localizing)) { | |
3574 | MAGIC *mg; | |
3575 | HV *stash; | |
3576 | ||
3577 | /* If we can determine whether the element exist, | |
3578 | * Try to preserve the existenceness of a tied array | |
3579 | * element by using EXISTS and DELETE if possible. | |
3580 | * Fallback to FETCH and STORE otherwise. */ | |
3581 | if (SvCANEXISTDELETE(av)) | |
3582 | preeminent = av_exists(av, elem); | |
3583 | } | |
3584 | ||
3585 | svp = av_fetch(av, elem, lval && !defer); | |
3586 | ||
3587 | if (lval) { | |
3588 | if (!svp || !(sv = *svp)) { | |
3589 | IV len; | |
3590 | if (!defer) | |
3591 | DIE(aTHX_ PL_no_aelem, elem); | |
3592 | len = av_tindex(av); | |
9ef753fe FC |
3593 | /* Resolve a negative index that falls within |
3594 | * the array. Leave it negative it if falls | |
3595 | * outside the array. */ | |
3596 | if (elem < 0 && len + elem >= 0) | |
3597 | elem = len + elem; | |
3598 | if (elem >= 0 && elem <= len) | |
3599 | /* Falls within the array. */ | |
3600 | sv = av_nonelem(av,elem); | |
3601 | else | |
3602 | /* Falls outside the array. If it is neg- | |
3603 | ative, magic_setdefelem will use the | |
3604 | index for error reporting. */ | |
3605 | sv = sv_2mortal(newSVavdefelem(av,elem,1)); | |
fedf30e1 DM |
3606 | } |
3607 | else { | |
3608 | if (UNLIKELY(localizing)) { | |
3609 | if (preeminent) { | |
3610 | save_aelem(av, elem, svp); | |
3611 | sv = *svp; /* may have changed */ | |
3612 | } | |
3613 | else | |
3614 | SAVEADELETE(av, elem); | |
3615 | } | |
3616 | } | |
3617 | } | |
3618 | else { | |
3619 | sv = (svp ? *svp : &PL_sv_undef); | |
3620 | /* see note in pp_helem() */ | |
3621 | if (SvRMAGICAL(av) && SvGMAGICAL(sv)) | |
3622 | mg_get(sv); | |
3623 | } | |
3624 | } | |
3625 | ||
3626 | } | |
3627 | finish: | |
3628 | { | |
3629 | dSP; | |
3630 | XPUSHs(sv); | |
3631 | RETURN; | |
3632 | } | |
3633 | /* NOTREACHED */ | |
3634 | ||
3635 | ||
3636 | ||
3637 | ||
3638 | case MDEREF_HV_padhv_helem: /* $lex{...} */ | |
3639 | sv = PAD_SVl((++items)->pad_offset); | |
3640 | goto do_HV_helem; | |
3641 | ||
3642 | case MDEREF_HV_gvhv_helem: /* $pkg{...} */ | |
3643 | sv = UNOP_AUX_item_sv(++items); | |
3644 | assert(isGV_with_GP(sv)); | |
3645 | sv = (SV*)GvHVn((GV*)sv); | |
3646 | goto do_HV_helem; | |
3647 | ||
3648 | case MDEREF_HV_pop_rv2hv_helem: /* expr->{...} */ | |
3649 | { | |
3650 | dSP; | |
3651 | sv = POPs; | |
3652 | PUTBACK; | |
3653 | goto do_HV_rv2hv_helem; | |
3654 | } | |
3655 | ||
3656 | case MDEREF_HV_gvsv_vivify_rv2hv_helem: /* $pkg->{...} */ | |
3657 | sv = UNOP_AUX_item_sv(++items); | |
3658 | assert(isGV_with_GP(sv)); | |
3659 | sv = GvSVn((GV*)sv); | |
3660 | goto do_HV_vivify_rv2hv_helem; | |
3661 | ||
3662 | case MDEREF_HV_padsv_vivify_rv2hv_helem: /* $lex->{...} */ | |
3663 | sv = PAD_SVl((++items)->pad_offset); | |
3664 | /* FALLTHROUGH */ | |
3665 | ||
3666 | do_HV_vivify_rv2hv_helem: | |
3667 | case MDEREF_HV_vivify_rv2hv_helem: /* vivify, ->{...} */ | |
3668 | /* this is the OPpDEREF action normally found at the end of | |
3669 | * ops like aelem, helem, rv2sv */ | |
3670 | sv = vivify_ref(sv, OPpDEREF_HV); | |
3671 | /* FALLTHROUGH */ | |
3672 | ||
3673 | do_HV_rv2hv_helem: | |
3674 | /* this is basically a copy of pp_rv2hv when it just has the | |
3675 | * sKR/1 flags (and pp_rv2hv is aliased to pp_rv2av) */ | |
3676 | ||
3677 | SvGETMAGIC(sv); | |
3678 | if (LIKELY(SvROK(sv))) { | |
3679 | if (UNLIKELY(SvAMAGIC(sv))) { | |
3680 | sv = amagic_deref_call(sv, to_hv_amg); | |
3681 | } | |
3682 | sv = SvRV(sv); | |
3683 | if (UNLIKELY(SvTYPE(sv) != SVt_PVHV)) | |
3684 | DIE(aTHX_ "Not a HASH reference"); | |
3685 | } | |
3686 | else if (SvTYPE(sv) != SVt_PVHV) { | |
3687 | if (!isGV_with_GP(sv)) | |
3688 | sv = (SV*)S_softref2xv_lite(aTHX_ sv, "a HASH", SVt_PVHV); | |
3689 | sv = MUTABLE_SV(GvHVn((GV*)sv)); | |
3690 | } | |
3691 | /* FALLTHROUGH */ | |
3692 | ||
3693 | do_HV_helem: | |
3694 | { | |
3695 | /* retrieve the key; this may be either a lexical / package | |
3696 | * var or a string constant, whose index/ptr is stored as an | |
3697 | * item | |
3698 | */ | |
3699 | SV *keysv = NULL; /* to shut up stupid compiler warnings */ | |
3700 | ||
3701 | assert(SvTYPE(sv) == SVt_PVHV); | |
3702 | ||
3703 | switch (actions & MDEREF_INDEX_MASK) { | |
3704 | case MDEREF_INDEX_none: | |
3705 | goto finish; | |
3706 | ||
3707 | case MDEREF_INDEX_const: | |
3708 | keysv = UNOP_AUX_item_sv(++items); | |
3709 | break; | |
3710 | ||
3711 | case MDEREF_INDEX_padsv: | |
3712 | keysv = PAD_SVl((++items)->pad_offset); | |
3713 | break; | |
3714 | ||
3715 | case MDEREF_INDEX_gvsv: | |
3716 | keysv = UNOP_AUX_item_sv(++items); | |
3717 | keysv = GvSVn((GV*)keysv); | |
3718 | break; | |
3719 | } | |
3720 | ||
3721 | /* see comment above about setting this var */ | |
3722 | PL_multideref_pc = items; | |
3723 | ||
3724 | ||
3725 | /* ensure that candidate CONSTs have been HEKified */ | |
3726 | assert( ((actions & MDEREF_INDEX_MASK) != MDEREF_INDEX_const) | |
3727 | || SvTYPE(keysv) >= SVt_PVMG | |
3728 | || !SvOK(keysv) | |
3729 | || SvROK(keysv) | |
3730 | || SvIsCOW_shared_hash(keysv)); | |
3731 | ||
3732 | /* this is basically a copy of pp_helem with OPpDEREF skipped */ | |
3733 | ||
3734 | if (!(actions & MDEREF_FLAG_last)) { | |
3735 | HE *he = hv_fetch_ent((HV*)sv, keysv, 1, 0); | |
3736 | if (!he || !(sv=HeVAL(he)) || sv == &PL_sv_undef) | |
3737 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); | |
3738 | break; | |
3739 | } | |
3740 | ||
3741 | if (PL_op->op_private & | |
3742 | (OPpMULTIDEREF_EXISTS|OPpMULTIDEREF_DELETE)) | |
3743 | { | |
3744 | if (PL_op->op_private & OPpMULTIDEREF_EXISTS) { | |
3745 | sv = hv_exists_ent((HV*)sv, keysv, 0) | |
3746 | ? &PL_sv_yes : &PL_sv_no; | |
3747 | } | |
3748 | else { | |
3749 | I32 discard = (GIMME_V == G_VOID) ? G_DISCARD : 0; | |
3750 | sv = hv_delete_ent((HV*)sv, keysv, discard, 0); | |
3751 | if (discard) | |
3752 | return NORMAL; | |
3753 | if (!sv) | |
3754 | sv = &PL_sv_undef; | |
3755 | } | |
3756 | } | |
3757 | else { | |
3758 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; | |
3759 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; | |
3760 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; | |
3761 | bool preeminent = TRUE; | |
3762 | SV **svp; | |
3763 | HV * const hv = (HV*)sv; | |
3764 | HE* he; | |
3765 | ||
3766 | if (UNLIKELY(localizing)) { | |
3767 | MAGIC *mg; | |
3768 | HV *stash; | |
3769 | ||
3770 | /* If we can determine whether the element exist, | |
3771 | * Try to preserve the existenceness of a tied hash | |
3772 | * element by using EXISTS and DELETE if possible. | |
3773 | * Fallback to FETCH and STORE otherwise. */ | |
3774 | if (SvCANEXISTDELETE(hv)) | |
3775 | preeminent = hv_exists_ent(hv, keysv, 0); | |
3776 | } | |
3777 | ||
3778 | he = hv_fetch_ent(hv, keysv, lval && !defer, 0); | |
3779 | svp = he ? &HeVAL(he) : NULL; | |
3780 | ||
3781 | ||
3782 | if (lval) { | |
3783 | if (!svp || !(sv = *svp) || sv == &PL_sv_undef) { | |
3784 | SV* lv; | |
3785 | SV* key2; | |
3786 | if (!defer) | |
3787 | DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv)); | |
3788 | lv = sv_newmortal(); | |
3789 | sv_upgrade(lv, SVt_PVLV); | |
3790 | LvTYPE(lv) = 'y'; | |
3791 | sv_magic(lv, key2 = newSVsv(keysv), | |
3792 | PERL_MAGIC_defelem, NULL, 0); | |
3793 | /* sv_magic() increments refcount */ | |
3794 | SvREFCNT_dec_NN(key2); | |
0ad694a7 | 3795 | LvTARG(lv) = SvREFCNT_inc_simple_NN(hv); |
fedf30e1 DM |
3796 | LvTARGLEN(lv) = 1; |
3797 | sv = lv; | |
3798 | } | |
3799 | else { | |
3800 | if (localizing) { | |
a35c9018 | 3801 | if (HvNAME_get(hv) && isGV_or_RVCV(sv)) |
fedf30e1 DM |
3802 | save_gp(MUTABLE_GV(sv), |
3803 | !(PL_op->op_flags & OPf_SPECIAL)); | |
3804 | else if (preeminent) { | |
3805 | save_helem_flags(hv, keysv, svp, | |
3806 | (PL_op->op_flags & OPf_SPECIAL) | |
3807 | ? 0 : SAVEf_SETMAGIC); | |
3808 | sv = *svp; /* may have changed */ | |
3809 | } | |
3810 | else | |
3811 | SAVEHDELETE(hv, keysv); | |
3812 | } | |
3813 | } | |
3814 | } | |
3815 | else { | |
3816 | sv = (svp && *svp ? *svp : &PL_sv_undef); | |
3817 | /* see note in pp_helem() */ | |
3818 | if (SvRMAGICAL(hv) && SvGMAGICAL(sv)) | |
3819 | mg_get(sv); | |
3820 | } | |
3821 | } | |
3822 | goto finish; | |
3823 | } | |
3824 | ||
3825 | } /* switch */ | |
3826 | ||
3827 | actions >>= MDEREF_SHIFT; | |
3828 | } /* while */ | |
3829 | /* NOTREACHED */ | |
3830 | } | |
3831 | ||
3832 | ||
a0d0e21e LW |
3833 | PP(pp_iter) |
3834 | { | |
eb578fdb | 3835 | PERL_CONTEXT *cx; |
7d6c2cef | 3836 | SV *oldsv; |
1d7c1841 | 3837 | SV **itersvp; |
a0d0e21e | 3838 | |
84f05d57 JH |
3839 | SV *sv; |
3840 | AV *av; | |
3841 | IV ix; | |
3842 | IV inc; | |
3843 | ||
4ebe6e95 | 3844 | cx = CX_CUR(); |
1d7c1841 | 3845 | itersvp = CxITERVAR(cx); |
4b5c941e | 3846 | assert(itersvp); |
a48ce6be DM |
3847 | |
3848 | switch (CxTYPE(cx)) { | |
17c91640 | 3849 | |
b552b52c DM |
3850 | case CXt_LOOP_LAZYSV: /* string increment */ |
3851 | { | |
3852 | SV* cur = cx->blk_loop.state_u.lazysv.cur; | |
3853 | SV *end = cx->blk_loop.state_u.lazysv.end; | |
3854 | /* If the maximum is !SvOK(), pp_enteriter substitutes PL_sv_no. | |
3855 | It has SvPVX of "" and SvCUR of 0, which is what we want. */ | |
3856 | STRLEN maxlen = 0; | |
3857 | const char *max = SvPV_const(end, maxlen); | |
d6c970c7 AC |
3858 | if (DO_UTF8(end) && IN_UNI_8_BIT) |
3859 | maxlen = sv_len_utf8_nomg(end); | |
5d9574c1 | 3860 | if (UNLIKELY(SvNIOK(cur) || SvCUR(cur) > maxlen)) |
8a1f10dd | 3861 | goto retno; |
b552b52c DM |
3862 | |
3863 | oldsv = *itersvp; | |
6d3ca00e DM |
3864 | /* NB: on the first iteration, oldsv will have a ref count of at |
3865 | * least 2 (one extra from blk_loop.itersave), so the GV or pad | |
3866 | * slot will get localised; on subsequent iterations the RC==1 | |
3867 | * optimisation may kick in and the SV will be reused. */ | |
3868 | if (oldsv && LIKELY(SvREFCNT(oldsv) == 1 && !SvMAGICAL(oldsv))) { | |
b552b52c DM |
3869 | /* safe to reuse old SV */ |
3870 | sv_setsv(oldsv, cur); | |
a48ce6be | 3871 | } |
b552b52c DM |
3872 | else |
3873 | { | |
3874 | /* we need a fresh SV every time so that loop body sees a | |
3875 | * completely new SV for closures/references to work as | |
3876 | * they used to */ | |
3877 | *itersvp = newSVsv(cur); | |
6d3ca00e | 3878 | SvREFCNT_dec(oldsv); |
b552b52c DM |
3879 | } |
3880 | if (strEQ(SvPVX_const(cur), max)) | |
3881 | sv_setiv(cur, 0); /* terminate next time */ | |
3882 | else | |
3883 | sv_inc(cur); | |
3884 | break; | |
3885 | } | |
a48ce6be | 3886 | |
fcef60b4 DM |
3887 | case CXt_LOOP_LAZYIV: /* integer increment */ |
3888 | { | |
3889 | IV cur = cx->blk_loop.state_u.lazyiv.cur; | |
5d9574c1 | 3890 | if (UNLIKELY(cur > cx->blk_loop.state_u.lazyiv.end)) |
8a1f10dd | 3891 | goto retno; |
7f61b687 | 3892 | |
fcef60b4 | 3893 | oldsv = *itersvp; |
6d3ca00e DM |
3894 | /* see NB comment above */ |
3895 | if (oldsv && LIKELY(SvREFCNT(oldsv) == 1 && !SvMAGICAL(oldsv))) { | |
eaa5c2d6 | 3896 | /* safe to reuse old SV */ |
47b96a1e DM |
3897 | |
3898 | if ( (SvFLAGS(oldsv) & (SVTYPEMASK|SVf_THINKFIRST|SVf_IVisUV)) | |
3899 | == SVt_IV) | |
3900 | { | |
3901 | /* Cheap SvIOK_only(). | |
3902 | * Assert that flags which SvIOK_only() would test or | |
3903 | * clear can't be set, because we're SVt_IV */ | |
3904 | assert(!(SvFLAGS(oldsv) & | |
3905 | (SVf_OOK|SVf_UTF8|(SVf_OK & ~(SVf_IOK|SVp_IOK))))); | |
3906 | SvFLAGS(oldsv) |= (SVf_IOK|SVp_IOK); | |
3907 | /* SvIV_set() where sv_any points to head */ | |
3908 | oldsv->sv_u.svu_iv = cur; | |
3909 | ||
3910 | } | |
3911 | else | |
3912 | sv_setiv(oldsv, cur); | |
eaa5c2d6 | 3913 | } |
1c846c1f | 3914 | else |
eaa5c2d6 GA |
3915 | { |
3916 | /* we need a fresh SV every time so that loop body sees a | |
3917 | * completely new SV for closures/references to work as they | |
3918 | * used to */ | |
fcef60b4 | 3919 | *itersvp = newSViv(cur); |
6d3ca00e | 3920 | SvREFCNT_dec(oldsv); |
eaa5c2d6 | 3921 | } |
a2309040 | 3922 | |
5d9574c1 | 3923 | if (UNLIKELY(cur == IV_MAX)) { |
cdc1aa42 NC |
3924 | /* Handle end of range at IV_MAX */ |
3925 | cx->blk_loop.state_u.lazyiv.end = IV_MIN; | |
3926 | } else | |
3927 | ++cx->blk_loop.state_u.lazyiv.cur; | |
a48ce6be | 3928 | break; |
fcef60b4 | 3929 | } |
a48ce6be | 3930 | |
93661e56 DM |
3931 | case CXt_LOOP_LIST: /* for (1,2,3) */ |
3932 | ||
3933 | assert(OPpITER_REVERSED == 2); /* so inc becomes -1 or 1 */ | |
d6139ec4 | 3934 | inc = (IV)1 - (IV)(PL_op->op_private & OPpITER_REVERSED); |
93661e56 DM |
3935 | ix = (cx->blk_loop.state_u.stack.ix += inc); |
3936 | if (UNLIKELY(inc > 0 | |
3937 | ? ix > cx->blk_oldsp | |
3938 | : ix <= cx->blk_loop.state_u.stack.basesp) | |
3939 | ) | |
8a1f10dd | 3940 | goto retno; |
93661e56 DM |
3941 | |
3942 | sv = PL_stack_base[ix]; | |
3943 | av = NULL; | |
3944 | goto loop_ary_common; | |
3945 | ||
3946 | case CXt_LOOP_ARY: /* for (@ary) */ | |
3947 | ||
3948 | av = cx->blk_loop.state_u.ary.ary; | |
d6139ec4 | 3949 | inc = (IV)1 - (IV)(PL_op->op_private & OPpITER_REVERSED); |
93661e56 DM |
3950 | ix = (cx->blk_loop.state_u.ary.ix += inc); |
3951 | if (UNLIKELY(inc > 0 | |
3952 | ? ix > AvFILL(av) | |
3953 | : ix < 0) | |
3954 | ) | |
8a1f10dd | 3955 | goto retno; |
de080daa | 3956 | |
9d1ee8e0 | 3957 | if (UNLIKELY(SvRMAGICAL(av))) { |
a8a20bb6 DM |
3958 | SV * const * const svp = av_fetch(av, ix, FALSE); |
3959 | sv = svp ? *svp : NULL; | |
3960 | } | |
3961 | else { | |
3962 | sv = AvARRAY(av)[ix]; | |
de080daa | 3963 | } |
ef3e5ea9 | 3964 | |
93661e56 DM |
3965 | loop_ary_common: |
3966 | ||
d39c26a6 FC |
3967 | if (UNLIKELY(cx->cx_type & CXp_FOR_LVREF)) { |
3968 | SvSetMagicSV(*itersvp, sv); | |
3969 | break; | |
3970 | } | |
3971 | ||
5d9574c1 DM |
3972 | if (LIKELY(sv)) { |
3973 | if (UNLIKELY(SvIS_FREED(sv))) { | |
f38aa882 DM |
3974 | *itersvp = NULL; |
3975 | Perl_croak(aTHX_ "Use of freed value in iteration"); | |
3976 | } | |
60779a30 | 3977 | if (SvPADTMP(sv)) { |
8e079c2a | 3978 | sv = newSVsv(sv); |
60779a30 | 3979 | } |
8e079c2a FC |
3980 | else { |
3981 | SvTEMP_off(sv); | |
3982 | SvREFCNT_inc_simple_void_NN(sv); | |
3983 | } | |
de080daa | 3984 | } |
93661e56 | 3985 | else if (av) { |
199f858d | 3986 | sv = newSVavdefelem(av, ix, 0); |
de080daa | 3987 | } |
a600f7e6 FC |
3988 | else |
3989 | sv = &PL_sv_undef; | |
a0d0e21e | 3990 | |
de080daa DM |
3991 | oldsv = *itersvp; |
3992 | *itersvp = sv; | |
3993 | SvREFCNT_dec(oldsv); | |
de080daa | 3994 | break; |
a48ce6be DM |
3995 | |
3996 | default: | |
3997 | DIE(aTHX_ "panic: pp_iter, type=%u", CxTYPE(cx)); | |
3998 | } | |
8a1f10dd | 3999 | |
f75ab299 | 4000 | /* Try to bypass pushing &PL_sv_yes and calling pp_and(); instead |
7c114860 DM |
4001 | * jump straight to the AND op's op_other */ |
4002 | assert(PL_op->op_next->op_type == OP_AND); | |
f75ab299 AC |
4003 | if (PL_op->op_next->op_ppaddr == Perl_pp_and) { |
4004 | return cLOGOPx(PL_op->op_next)->op_other; | |
4005 | } | |
4006 | else { | |
4007 | /* An XS module has replaced the op_ppaddr, so fall back to the slow, | |
4008 | * obvious way. */ | |
4009 | /* pp_enteriter should have pre-extended the stack */ | |
4010 | EXTEND_SKIP(PL_stack_sp, 1); | |
4011 | *++PL_stack_sp = &PL_sv_yes; | |
4012 | return PL_op->op_next; | |
4013 | } | |
7c114860 DM |
4014 | |
4015 | retno: | |
f75ab299 | 4016 | /* Try to bypass pushing &PL_sv_no and calling pp_and(); instead |
7c114860 DM |
4017 | * jump straight to the AND op's op_next */ |
4018 | assert(PL_op->op_next->op_type == OP_AND); | |
8a1f10dd | 4019 | /* pp_enteriter should have pre-extended the stack */ |
87058c31 | 4020 | EXTEND_SKIP(PL_stack_sp, 1); |
7c114860 DM |
4021 | /* we only need this for the rare case where the OP_AND isn't |
4022 | * in void context, e.g. $x = do { for (..) {...} }; | |
f75ab299 AC |
4023 | * (or for when an XS module has replaced the op_ppaddr) |
4024 | * but it's cheaper to just push it rather than testing first | |
7c114860 DM |
4025 | */ |
4026 | *++PL_stack_sp = &PL_sv_no; | |
f75ab299 AC |
4027 | if (PL_op->op_next->op_ppaddr == Perl_pp_and) { |
4028 | return PL_op->op_next->op_next; | |
4029 | } | |
4030 | else { | |
4031 | /* An XS module has replaced the op_ppaddr, so fall back to the slow, | |
4032 | * obvious way. */ | |
4033 | return PL_op->op_next; | |
4034 | } | |
a0d0e21e LW |
4035 | } |
4036 | ||
7c114860 | 4037 | |
ef07e810 DM |
4038 | /* |
4039 | A description of how taint works in pattern matching and substitution. | |
4040 | ||
284167a5 S |
4041 | This is all conditional on NO_TAINT_SUPPORT not being defined. Under |
4042 | NO_TAINT_SUPPORT, taint-related operations should become no-ops. | |
4043 | ||
4e19c54b | 4044 | While the pattern is being assembled/concatenated and then compiled, |
284167a5 S |
4045 | PL_tainted will get set (via TAINT_set) if any component of the pattern |
4046 | is tainted, e.g. /.*$tainted/. At the end of pattern compilation, | |
4047 | the RXf_TAINTED flag is set on the pattern if PL_tainted is set (via | |
1738e041 DM |
4048 | TAINT_get). It will also be set if any component of the pattern matches |
4049 | based on locale-dependent behavior. | |
ef07e810 | 4050 | |
0ab462a6 DM |
4051 | When the pattern is copied, e.g. $r = qr/..../, the SV holding the ref to |
4052 | the pattern is marked as tainted. This means that subsequent usage, such | |
284167a5 S |
4053 | as /x$r/, will set PL_tainted using TAINT_set, and thus RXf_TAINTED, |
4054 | on the new pattern too. | |
ef07e810 | 4055 | |
272d35c9 | 4056 | RXf_TAINTED_SEEN is used post-execution by the get magic code |
ef07e810 DM |
4057 | of $1 et al to indicate whether the returned value should be tainted. |
4058 | It is the responsibility of the caller of the pattern (i.e. pp_match, | |
4059 | pp_subst etc) to set this flag for any other circumstances where $1 needs | |
4060 | to be tainted. | |
4061 | ||
4062 | The taint behaviour of pp_subst (and pp_substcont) is quite complex. | |
4063 | ||
4064 | There are three possible sources of taint | |
4065 | * the source string | |
4066 | * the pattern (both compile- and run-time, RXf_TAINTED / RXf_TAINTED_SEEN) | |
4067 | * the replacement string (or expression under /e) | |
4068 | ||
4069 | There are four destinations of taint and they are affected by the sources | |
4070 | according to the rules below: | |
4071 | ||
4072 | * the return value (not including /r): | |
4073 | tainted by the source string and pattern, but only for the | |
4074 | number-of-iterations case; boolean returns aren't tainted; | |
4075 | * the modified string (or modified copy under /r): | |
4076 | tainted by the source string, pattern, and replacement strings; | |
4077 | * $1 et al: | |
4078 | tainted by the pattern, and under 'use re "taint"', by the source | |
4079 | string too; | |
4080 | * PL_taint - i.e. whether subsequent code (e.g. in a /e block) is tainted: | |
4081 | should always be unset before executing subsequent code. | |
4082 | ||
4083 | The overall action of pp_subst is: | |
4084 | ||
4085 | * at the start, set bits in rxtainted indicating the taint status of | |
4086 | the various sources. | |
4087 | ||
4088 | * After each pattern execution, update the SUBST_TAINT_PAT bit in | |
4089 | rxtainted if RXf_TAINTED_SEEN has been set, to indicate that the | |
4090 | pattern has subsequently become tainted via locale ops. | |
4091 | ||
4092 | * If control is being passed to pp_substcont to execute a /e block, | |
4093 | save rxtainted in the CXt_SUBST block, for future use by | |
4094 | pp_substcont. | |
4095 | ||
4096 | * Whenever control is being returned to perl code (either by falling | |
4097 | off the "end" of pp_subst/pp_substcont, or by entering a /e block), | |
4098 | use the flag bits in rxtainted to make all the appropriate types of | |
0ab462a6 DM |
4099 | destination taint visible; e.g. set RXf_TAINTED_SEEN so that $1 |
4100 | et al will appear tainted. | |
ef07e810 DM |
4101 | |
4102 | pp_match is just a simpler version of the above. | |
4103 | ||
4104 | */ | |
4105 | ||
a0d0e21e LW |
4106 | PP(pp_subst) |
4107 | { | |
20b7effb | 4108 | dSP; dTARG; |
eb578fdb | 4109 | PMOP *pm = cPMOP; |
a0d0e21e | 4110 | PMOP *rpm = pm; |
eb578fdb | 4111 | char *s; |
a0d0e21e | 4112 | char *strend; |
5c144d81 | 4113 | const char *c; |
a0d0e21e | 4114 | STRLEN clen; |
3c6ef0a5 FC |
4115 | SSize_t iters = 0; |
4116 | SSize_t maxiters; | |
a0d0e21e | 4117 | bool once; |
ef07e810 DM |
4118 | U8 rxtainted = 0; /* holds various SUBST_TAINT_* flag bits. |
4119 | See "how taint works" above */ | |
a0d0e21e | 4120 | char *orig; |
1ed74d04 | 4121 | U8 r_flags; |
eb578fdb | 4122 | REGEXP *rx = PM_GETRE(pm); |
196a02af | 4123 | regexp *prog = ReANY(rx); |
a0d0e21e LW |
4124 | STRLEN len; |
4125 | int force_on_match = 0; | |
0bcc34c2 | 4126 | const I32 oldsave = PL_savestack_ix; |
792b2c16 | 4127 | STRLEN slen; |
26a74523 | 4128 | bool doutf8 = FALSE; /* whether replacement is in utf8 */ |
db2c6cb3 | 4129 | #ifdef PERL_ANY_COW |
106d9a13 | 4130 | bool was_cow; |
ed252734 | 4131 | #endif |
a0714e2c | 4132 | SV *nsv = NULL; |
b770e143 | 4133 | /* known replacement string? */ |
eb578fdb | 4134 | SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL; |
a0d0e21e | 4135 | |
f410a211 NC |
4136 | PERL_ASYNC_CHECK(); |
4137 | ||
533c011a | 4138 | if (PL_op->op_flags & OPf_STACKED) |
a0d0e21e LW |
4139 | TARG = POPs; |
4140 | else { | |
9399c607 DM |
4141 | if (ARGTARG) |
4142 | GETTARGET; | |
4143 | else { | |
4144 | TARG = DEFSV; | |
4145 | } | |
a0d0e21e | 4146 | EXTEND(SP,1); |
1c846c1f | 4147 | } |
d9f424b2 | 4148 | |
64534138 | 4149 | SvGETMAGIC(TARG); /* must come before cow check */ |
db2c6cb3 | 4150 | #ifdef PERL_ANY_COW |
106d9a13 DM |
4151 | /* note that a string might get converted to COW during matching */ |
4152 | was_cow = cBOOL(SvIsCOW(TARG)); | |
ed252734 | 4153 | #endif |
d13a5d3b TC |
4154 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT)) { |
4155 | #ifndef PERL_ANY_COW | |
4156 | if (SvIsCOW(TARG)) | |
4157 | sv_force_normal_flags(TARG,0); | |
4158 | #endif | |
4159 | if ((SvREADONLY(TARG) | |
4160 | || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG)) | |
4161 | || SvTYPE(TARG) > SVt_PVLV) | |
4162 | && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))) | |
4163 | Perl_croak_no_modify(); | |
4164 | } | |
8ec5e241 NIS |
4165 | PUTBACK; |
4166 | ||
6ac6605d DM |
4167 | orig = SvPV_nomg(TARG, len); |
4168 | /* note we don't (yet) force the var into being a string; if we fail | |
92711104 | 4169 | * to match, we leave as-is; on successful match however, we *will* |
6ac6605d | 4170 | * coerce into a string, then repeat the match */ |
4499db73 | 4171 | if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV || SvVOK(TARG)) |
a0d0e21e | 4172 | force_on_match = 1; |
20be6587 DM |
4173 | |
4174 | /* only replace once? */ | |
4175 | once = !(rpm->op_pmflags & PMf_GLOBAL); | |
4176 | ||
ef07e810 | 4177 | /* See "how taint works" above */ |
284167a5 | 4178 | if (TAINTING_get) { |
20be6587 DM |
4179 | rxtainted = ( |
4180 | (SvTAINTED(TARG) ? SUBST_TAINT_STR : 0) | |
196a02af | 4181 | | (RXp_ISTAINTED(prog) ? SUBST_TAINT_PAT : 0) |
20be6587 | 4182 | | ((pm->op_pmflags & PMf_RETAINT) ? SUBST_TAINT_RETAINT : 0) |
5e501dc5 DM |
4183 | | (( (once && !(rpm->op_pmflags & PMf_NONDESTRUCT)) |
4184 | || (PL_op->op_private & OPpTRUEBOOL)) ? SUBST_TAINT_BOOLRET : 0)); | |
20be6587 DM |
4185 | TAINT_NOT; |
4186 | } | |
a12c0f56 | 4187 | |
a0d0e21e | 4188 | force_it: |
6ac6605d DM |
4189 | if (!pm || !orig) |
4190 | DIE(aTHX_ "panic: pp_subst, pm=%p, orig=%p", pm, orig); | |
a0d0e21e | 4191 | |
6ac6605d DM |
4192 | strend = orig + len; |
4193 | slen = DO_UTF8(TARG) ? utf8_length((U8*)orig, (U8*)strend) : len; | |
792b2c16 JH |
4194 | maxiters = 2 * slen + 10; /* We can match twice at each |
4195 | position, once with zero-length, | |
4196 | second time with non-zero. */ | |
a0d0e21e | 4197 | |
794826f4 | 4198 | /* handle the empty pattern */ |
196a02af | 4199 | if (!RX_PRELEN(rx) && PL_curpm && !prog->mother_re) { |
5585e758 YO |
4200 | if (PL_curpm == PL_reg_curpm) { |
4201 | if (PL_curpm_under) { | |
4202 | if (PL_curpm_under == PL_reg_curpm) { | |
4203 | Perl_croak(aTHX_ "Infinite recursion via empty pattern"); | |
4204 | } else { | |
4205 | pm = PL_curpm_under; | |
4206 | } | |
4207 | } | |
4208 | } else { | |
4209 | pm = PL_curpm; | |
4210 | } | |
4211 | rx = PM_GETRE(pm); | |
196a02af | 4212 | prog = ReANY(rx); |
a0d0e21e | 4213 | } |
6502e081 | 4214 | |
6e240d0b | 4215 | #ifdef PERL_SAWAMPERSAND |
196a02af | 4216 | r_flags = ( RXp_NPARENS(prog) |
6502e081 | 4217 | || PL_sawampersand |
196a02af | 4218 | || (RXp_EXTFLAGS(prog) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) |
5b0e71e9 | 4219 | || (rpm->op_pmflags & PMf_KEEPCOPY) |
6502e081 DM |
4220 | ) |
4221 | ? REXEC_COPY_STR | |
4222 | : 0; | |
6e240d0b FC |
4223 | #else |
4224 | r_flags = REXEC_COPY_STR; | |
4225 | #endif | |
7fba1cd6 | 4226 | |
0395280b | 4227 | if (!CALLREGEXEC(rx, orig, strend, orig, 0, TARG, NULL, r_flags)) |
8b64c330 | 4228 | { |
5e79dfb9 DM |
4229 | SPAGAIN; |
4230 | PUSHs(rpm->op_pmflags & PMf_NONDESTRUCT ? TARG : &PL_sv_no); | |
4231 | LEAVE_SCOPE(oldsave); | |
4232 | RETURN; | |
4233 | } | |
1754320d FC |
4234 | PL_curpm = pm; |
4235 | ||
71be2cbc | 4236 | /* known replacement string? */ |
f272994b | 4237 | if (dstr) { |
8514a05a JH |
4238 | /* replacement needing upgrading? */ |
4239 | if (DO_UTF8(TARG) && !doutf8) { | |
db79b45b | 4240 | nsv = sv_newmortal(); |
4a176938 | 4241 | SvSetSV(nsv, dstr); |
8df0e7a2 | 4242 | sv_utf8_upgrade(nsv); |
5c144d81 | 4243 | c = SvPV_const(nsv, clen); |
4a176938 JH |
4244 | doutf8 = TRUE; |
4245 | } | |
4246 | else { | |
5c144d81 | 4247 | c = SvPV_const(dstr, clen); |
4a176938 | 4248 | doutf8 = DO_UTF8(dstr); |
8514a05a | 4249 | } |
bb933b9b | 4250 | |
c4f4b223 | 4251 | if (UNLIKELY(TAINT_get)) |
bb933b9b | 4252 | rxtainted |= SUBST_TAINT_REPL; |
f272994b A |
4253 | } |
4254 | else { | |
6136c704 | 4255 | c = NULL; |
f272994b A |
4256 | doutf8 = FALSE; |
4257 | } | |
4258 | ||
71be2cbc | 4259 | /* can do inplace substitution? */ |
ed252734 | 4260 | if (c |
db2c6cb3 | 4261 | #ifdef PERL_ANY_COW |
106d9a13 | 4262 | && !was_cow |
ed252734 | 4263 | #endif |
196a02af | 4264 | && (I32)clen <= RXp_MINLENRET(prog) |
9cefd268 FC |
4265 | && ( once |
4266 | || !(r_flags & REXEC_COPY_STR) | |
196a02af | 4267 | || (!SvGMAGICAL(dstr) && !(RXp_EXTFLAGS(prog) & RXf_EVAL_SEEN)) |
9cefd268 | 4268 | ) |
196a02af | 4269 | && !(RXp_EXTFLAGS(prog) & RXf_NO_INPLACE_SUBST) |
8ca8a454 NC |
4270 | && (!doutf8 || SvUTF8(TARG)) |
4271 | && !(rpm->op_pmflags & PMf_NONDESTRUCT)) | |
8b030b38 | 4272 | { |
ec911639 | 4273 | |
db2c6cb3 | 4274 | #ifdef PERL_ANY_COW |
106d9a13 | 4275 | /* string might have got converted to COW since we set was_cow */ |
ed252734 | 4276 | if (SvIsCOW(TARG)) { |
f7a8268c | 4277 | if (!force_on_match) |
ed252734 | 4278 | goto have_a_cow; |
f7a8268c | 4279 | assert(SvVOK(TARG)); |
ed252734 NC |
4280 | } |
4281 | #endif | |
71be2cbc | 4282 | if (force_on_match) { |
6ac6605d DM |
4283 | /* redo the first match, this time with the orig var |
4284 | * forced into being a string */ | |
71be2cbc | 4285 | force_on_match = 0; |
6ac6605d | 4286 | orig = SvPV_force_nomg(TARG, len); |
71be2cbc | 4287 | goto force_it; |
4288 | } | |
39b40493 | 4289 | |
71be2cbc | 4290 | if (once) { |
c67ab8f2 | 4291 | char *d, *m; |
196a02af | 4292 | if (RXp_MATCH_TAINTED(prog)) /* run time pattern taint, eg locale */ |
20be6587 | 4293 | rxtainted |= SUBST_TAINT_PAT; |
196a02af DM |
4294 | m = orig + RXp_OFFS(prog)[0].start; |
4295 | d = orig + RXp_OFFS(prog)[0].end; | |
71be2cbc | 4296 | s = orig; |
4297 | if (m - s > strend - d) { /* faster to shorten from end */ | |
2ec7214c | 4298 | I32 i; |
71be2cbc | 4299 | if (clen) { |
4300 | Copy(c, m, clen, char); | |
4301 | m += clen; | |
a0d0e21e | 4302 | } |
71be2cbc | 4303 | i = strend - d; |
4304 | if (i > 0) { | |
4305 | Move(d, m, i, char); | |
4306 | m += i; | |
a0d0e21e | 4307 | } |
71be2cbc | 4308 | *m = '\0'; |
4309 | SvCUR_set(TARG, m - s); | |
4310 | } | |
2ec7214c DM |
4311 | else { /* faster from front */ |
4312 | I32 i = m - s; | |
71be2cbc | 4313 | d -= clen; |
2ec7214c DM |
4314 | if (i > 0) |
4315 | Move(s, d - i, i, char); | |
71be2cbc | 4316 | sv_chop(TARG, d-i); |
71be2cbc | 4317 | if (clen) |
c947cd8d | 4318 | Copy(c, d, clen, char); |
71be2cbc | 4319 | } |
8ec5e241 | 4320 | SPAGAIN; |
8ca8a454 | 4321 | PUSHs(&PL_sv_yes); |
71be2cbc | 4322 | } |
4323 | else { | |
c67ab8f2 | 4324 | char *d, *m; |
196a02af | 4325 | d = s = RXp_OFFS(prog)[0].start + orig; |
71be2cbc | 4326 | do { |
2b25edcf | 4327 | I32 i; |
5d9574c1 | 4328 | if (UNLIKELY(iters++ > maxiters)) |
cea2e8a9 | 4329 | DIE(aTHX_ "Substitution loop"); |
196a02af DM |
4330 | /* run time pattern taint, eg locale */ |
4331 | if (UNLIKELY(RXp_MATCH_TAINTED(prog))) | |
20be6587 | 4332 | rxtainted |= SUBST_TAINT_PAT; |
196a02af | 4333 | m = RXp_OFFS(prog)[0].start + orig; |
155aba94 | 4334 | if ((i = m - s)) { |
71be2cbc | 4335 | if (s != d) |
4336 | Move(s, d, i, char); | |
4337 | d += i; | |
a0d0e21e | 4338 | } |
71be2cbc | 4339 | if (clen) { |
4340 | Copy(c, d, clen, char); | |
4341 | d += clen; | |
4342 | } | |
196a02af | 4343 | s = RXp_OFFS(prog)[0].end + orig; |
7ce41e5c FC |
4344 | } while (CALLREGEXEC(rx, s, strend, orig, |
4345 | s == m, /* don't match same null twice */ | |
f722798b | 4346 | TARG, NULL, |
d5e7783a | 4347 | REXEC_NOT_FIRST|REXEC_IGNOREPOS|REXEC_FAIL_ON_UNDERFLOW)); |
71be2cbc | 4348 | if (s != d) { |
2b25edcf | 4349 | I32 i = strend - s; |
aa07b2f6 | 4350 | SvCUR_set(TARG, d - SvPVX_const(TARG) + i); |
71be2cbc | 4351 | Move(s, d, i+1, char); /* include the NUL */ |
a0d0e21e | 4352 | } |
8ec5e241 | 4353 | SPAGAIN; |
04d59685 | 4354 | assert(iters); |
7b394f12 | 4355 | if (PL_op->op_private & OPpTRUEBOOL) |
04d59685 | 4356 | PUSHs(&PL_sv_yes); |
7b394f12 DM |
4357 | else |
4358 | mPUSHi(iters); | |
a0d0e21e LW |
4359 | } |
4360 | } | |
ff6e92e8 | 4361 | else { |
1754320d | 4362 | bool first; |
c67ab8f2 | 4363 | char *m; |
1754320d | 4364 | SV *repl; |
a0d0e21e | 4365 | if (force_on_match) { |
6ac6605d DM |
4366 | /* redo the first match, this time with the orig var |
4367 | * forced into being a string */ | |
a0d0e21e | 4368 | force_on_match = 0; |
0c1438a1 NC |
4369 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
4370 | /* I feel that it should be possible to avoid this mortal copy | |
4371 | given that the code below copies into a new destination. | |
4372 | However, I suspect it isn't worth the complexity of | |
4373 | unravelling the C<goto force_it> for the small number of | |
4374 | cases where it would be viable to drop into the copy code. */ | |
4375 | TARG = sv_2mortal(newSVsv(TARG)); | |
4376 | } | |
6ac6605d | 4377 | orig = SvPV_force_nomg(TARG, len); |
a0d0e21e LW |
4378 | goto force_it; |
4379 | } | |
db2c6cb3 | 4380 | #ifdef PERL_ANY_COW |
ed252734 NC |
4381 | have_a_cow: |
4382 | #endif | |
196a02af | 4383 | if (RXp_MATCH_TAINTED(prog)) /* run time pattern taint, eg locale */ |
20be6587 | 4384 | rxtainted |= SUBST_TAINT_PAT; |
1754320d | 4385 | repl = dstr; |
196a02af | 4386 | s = RXp_OFFS(prog)[0].start + orig; |
0395280b DM |
4387 | dstr = newSVpvn_flags(orig, s-orig, |
4388 | SVs_TEMP | (DO_UTF8(TARG) ? SVf_UTF8 : 0)); | |
a0d0e21e | 4389 | if (!c) { |
eb578fdb | 4390 | PERL_CONTEXT *cx; |
8ec5e241 | 4391 | SPAGAIN; |
0395280b | 4392 | m = orig; |
20be6587 DM |
4393 | /* note that a whole bunch of local vars are saved here for |
4394 | * use by pp_substcont: here's a list of them in case you're | |
4395 | * searching for places in this sub that uses a particular var: | |
4396 | * iters maxiters r_flags oldsave rxtainted orig dstr targ | |
4397 | * s m strend rx once */ | |
490576d1 | 4398 | CX_PUSHSUBST(cx); |
20e98b0f | 4399 | RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot); |
a0d0e21e | 4400 | } |
1754320d | 4401 | first = TRUE; |
a0d0e21e | 4402 | do { |
5d9574c1 | 4403 | if (UNLIKELY(iters++ > maxiters)) |
cea2e8a9 | 4404 | DIE(aTHX_ "Substitution loop"); |
196a02af | 4405 | if (UNLIKELY(RXp_MATCH_TAINTED(prog))) |
20be6587 | 4406 | rxtainted |= SUBST_TAINT_PAT; |
196a02af | 4407 | if (RXp_MATCH_COPIED(prog) && RXp_SUBBEG(prog) != orig) { |
c67ab8f2 DM |
4408 | char *old_s = s; |
4409 | char *old_orig = orig; | |
196a02af | 4410 | assert(RXp_SUBOFFSET(prog) == 0); |
c67ab8f2 | 4411 | |
196a02af | 4412 | orig = RXp_SUBBEG(prog); |
c67ab8f2 DM |
4413 | s = orig + (old_s - old_orig); |
4414 | strend = s + (strend - old_s); | |
a0d0e21e | 4415 | } |
196a02af | 4416 | m = RXp_OFFS(prog)[0].start + orig; |
64534138 | 4417 | sv_catpvn_nomg_maybeutf8(dstr, s, m - s, DO_UTF8(TARG)); |
196a02af | 4418 | s = RXp_OFFS(prog)[0].end + orig; |
1754320d FC |
4419 | if (first) { |
4420 | /* replacement already stringified */ | |
4421 | if (clen) | |
64534138 | 4422 | sv_catpvn_nomg_maybeutf8(dstr, c, clen, doutf8); |
1754320d FC |
4423 | first = FALSE; |
4424 | } | |
4425 | else { | |
8df0e7a2 | 4426 | sv_catsv(dstr, repl); |
1754320d | 4427 | } |
a0d0e21e LW |
4428 | if (once) |
4429 | break; | |
ff27773b KW |
4430 | } while (CALLREGEXEC(rx, s, strend, orig, |
4431 | s == m, /* Yields minend of 0 or 1 */ | |
d5e7783a DM |
4432 | TARG, NULL, |
4433 | REXEC_NOT_FIRST|REXEC_IGNOREPOS|REXEC_FAIL_ON_UNDERFLOW)); | |
aba224f7 | 4434 | assert(strend >= s); |
64534138 | 4435 | sv_catpvn_nomg_maybeutf8(dstr, s, strend - s, DO_UTF8(TARG)); |
748a9306 | 4436 | |
8ca8a454 NC |
4437 | if (rpm->op_pmflags & PMf_NONDESTRUCT) { |
4438 | /* From here on down we're using the copy, and leaving the original | |
4439 | untouched. */ | |
4440 | TARG = dstr; | |
4441 | SPAGAIN; | |
4442 | PUSHs(dstr); | |
4443 | } else { | |
db2c6cb3 | 4444 | #ifdef PERL_ANY_COW |
8ca8a454 NC |
4445 | /* The match may make the string COW. If so, brilliant, because |
4446 | that's just saved us one malloc, copy and free - the regexp has | |
4447 | donated the old buffer, and we malloc an entirely new one, rather | |
4448 | than the regexp malloc()ing a buffer and copying our original, | |
4449 | only for us to throw it away here during the substitution. */ | |
4450 | if (SvIsCOW(TARG)) { | |
4451 | sv_force_normal_flags(TARG, SV_COW_DROP_PV); | |
4452 | } else | |
ed252734 | 4453 | #endif |
8ca8a454 NC |
4454 | { |
4455 | SvPV_free(TARG); | |
4456 | } | |
4457 | SvPV_set(TARG, SvPVX(dstr)); | |
4458 | SvCUR_set(TARG, SvCUR(dstr)); | |
4459 | SvLEN_set(TARG, SvLEN(dstr)); | |
64534138 | 4460 | SvFLAGS(TARG) |= SvUTF8(dstr); |
8ca8a454 | 4461 | SvPV_set(dstr, NULL); |
748a9306 | 4462 | |
8ca8a454 | 4463 | SPAGAIN; |
c352ee5f | 4464 | if (PL_op->op_private & OPpTRUEBOOL) |
04d59685 | 4465 | PUSHs(&PL_sv_yes); |
c352ee5f DM |
4466 | else |
4467 | mPUSHi(iters); | |
8ca8a454 NC |
4468 | } |
4469 | } | |
4470 | ||
4471 | if (!(rpm->op_pmflags & PMf_NONDESTRUCT)) { | |
4472 | (void)SvPOK_only_UTF8(TARG); | |
a0d0e21e | 4473 | } |
20be6587 | 4474 | |
ef07e810 | 4475 | /* See "how taint works" above */ |
284167a5 | 4476 | if (TAINTING_get) { |
20be6587 DM |
4477 | if ((rxtainted & SUBST_TAINT_PAT) || |
4478 | ((rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) == | |
4479 | (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) | |
4480 | ) | |
196a02af | 4481 | (RXp_MATCH_TAINTED_on(prog)); /* taint $1 et al */ |
20be6587 DM |
4482 | |
4483 | if (!(rxtainted & SUBST_TAINT_BOOLRET) | |
4484 | && (rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT)) | |
4485 | ) | |
4486 | SvTAINTED_on(TOPs); /* taint return value */ | |
4487 | else | |
4488 | SvTAINTED_off(TOPs); /* may have got tainted earlier */ | |
4489 | ||
4490 | /* needed for mg_set below */ | |
284167a5 S |
4491 | TAINT_set( |
4492 | cBOOL(rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)) | |
4493 | ); | |
20be6587 DM |
4494 | SvTAINT(TARG); |
4495 | } | |
4496 | SvSETMAGIC(TARG); /* PL_tainted must be correctly set for this mg_set */ | |
4497 | TAINT_NOT; | |
f1a76097 DM |
4498 | LEAVE_SCOPE(oldsave); |
4499 | RETURN; | |
a0d0e21e LW |
4500 | } |
4501 | ||
4502 | PP(pp_grepwhile) | |
4503 | { | |
20b7effb | 4504 | dSP; |
f4c975aa | 4505 | dPOPss; |
a0d0e21e | 4506 | |
f4c975aa | 4507 | if (SvTRUE_NN(sv)) |
3280af22 NIS |
4508 | PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr]; |
4509 | ++*PL_markstack_ptr; | |
b2a2a901 | 4510 | FREETMPS; |
d343c3ef | 4511 | LEAVE_with_name("grep_item"); /* exit inner scope */ |
a0d0e21e LW |
4512 | |
4513 | /* All done yet? */ | |
5d9574c1 | 4514 | if (UNLIKELY(PL_stack_base + *PL_markstack_ptr > SP)) { |
a0d0e21e | 4515 | I32 items; |
1c23e2bd | 4516 | const U8 gimme = GIMME_V; |
a0d0e21e | 4517 | |
d343c3ef | 4518 | LEAVE_with_name("grep"); /* exit outer scope */ |
a0d0e21e | 4519 | (void)POPMARK; /* pop src */ |
3280af22 | 4520 | items = --*PL_markstack_ptr - PL_markstack_ptr[-1]; |
a0d0e21e | 4521 | (void)POPMARK; /* pop dst */ |
3280af22 | 4522 | SP = PL_stack_base + POPMARK; /* pop original mark */ |
54310121 | 4523 | if (gimme == G_SCALAR) { |
7b394f12 | 4524 | if (PL_op->op_private & OPpTRUEBOOL) |
e3ad3bbc | 4525 | PUSHs(items ? &PL_sv_yes : &PL_sv_zero); |
7b394f12 | 4526 | else { |
7cc47870 | 4527 | dTARGET; |
e3ad3bbc | 4528 | PUSHi(items); |
7b394f12 | 4529 | } |
a0d0e21e | 4530 | } |
54310121 | 4531 | else if (gimme == G_ARRAY) |
4532 | SP += items; | |
a0d0e21e LW |
4533 | RETURN; |
4534 | } | |
4535 | else { | |
4536 | SV *src; | |
4537 | ||
d343c3ef | 4538 | ENTER_with_name("grep_item"); /* enter inner scope */ |
1d7c1841 | 4539 | SAVEVPTR(PL_curpm); |
a0d0e21e | 4540 | |
6cae08a8 | 4541 | src = PL_stack_base[TOPMARK]; |
60779a30 | 4542 | if (SvPADTMP(src)) { |
6cae08a8 | 4543 | src = PL_stack_base[TOPMARK] = sv_mortalcopy(src); |
a0ed822e FC |
4544 | PL_tmps_floor++; |
4545 | } | |
a0d0e21e | 4546 | SvTEMP_off(src); |
ffd49c98 | 4547 | DEFSV_set(src); |
a0d0e21e LW |
4548 | |
4549 | RETURNOP(cLOGOP->op_other); | |
4550 | } | |
4551 | } | |
4552 | ||
799da9d7 | 4553 | /* leave_adjust_stacks(): |
f7a874b8 | 4554 | * |
e02ce34b DM |
4555 | * Process a scope's return args (in the range from_sp+1 .. PL_stack_sp), |
4556 | * positioning them at to_sp+1 onwards, and do the equivalent of a | |
4557 | * FREEMPS and TAINT_NOT. | |
4558 | * | |
f7a874b8 DM |
4559 | * Not intended to be called in void context. |
4560 | * | |
799da9d7 DM |
4561 | * When leaving a sub, eval, do{} or other scope, the things that need |
4562 | * doing to process the return args are: | |
f7a874b8 | 4563 | * * in scalar context, only return the last arg (or PL_sv_undef if none); |
799da9d7 DM |
4564 | * * for the types of return that return copies of their args (such |
4565 | * as rvalue sub return), make a mortal copy of every return arg, | |
4566 | * except where we can optimise the copy away without it being | |
4567 | * semantically visible; | |
4568 | * * make sure that the arg isn't prematurely freed; in the case of an | |
4569 | * arg not copied, this may involve mortalising it. For example, in | |
f7a874b8 DM |
4570 | * C<sub f { my $x = ...; $x }>, $x would be freed when we do |
4571 | * CX_LEAVE_SCOPE(cx) unless it's protected or copied. | |
4572 | * | |
799da9d7 DM |
4573 | * What condition to use when deciding whether to pass the arg through |
4574 | * or make a copy, is determined by the 'pass' arg; its valid values are: | |
4575 | * 0: rvalue sub/eval exit | |
4576 | * 1: other rvalue scope exit | |
4577 | * 2: :lvalue sub exit in rvalue context | |
4578 | * 3: :lvalue sub exit in lvalue context and other lvalue scope exits | |
4579 | * | |
f7a874b8 | 4580 | * There is a big issue with doing a FREETMPS. We would like to free any |
799da9d7 | 4581 | * temps created by the last statement which the sub executed, rather than |
f7a874b8 DM |
4582 | * leaving them for the caller. In a situation where a sub call isn't |
4583 | * soon followed by a nextstate (e.g. nested recursive calls, a la | |
4584 | * fibonacci()), temps can accumulate, causing memory and performance | |
4585 | * issues. | |
4586 | * | |
4587 | * On the other hand, we don't want to free any TEMPs which are keeping | |
799da9d7 DM |
4588 | * alive any return args that we skipped copying; nor do we wish to undo |
4589 | * any mortalising done here. | |
f7a874b8 DM |
4590 | * |
4591 | * The solution is to split the temps stack frame into two, with a cut | |
4592 | * point delineating the two halves. We arrange that by the end of this | |
4593 | * function, all the temps stack frame entries we wish to keep are in the | |
799da9d7 | 4594 | * range PL_tmps_floor+1.. tmps_base-1, while the ones to free now are in |
f7a874b8 DM |
4595 | * the range tmps_base .. PL_tmps_ix. During the course of this |
4596 | * function, tmps_base starts off as PL_tmps_floor+1, then increases | |
4597 | * whenever we find or create a temp that we know should be kept. In | |
4598 | * general the stuff above tmps_base is undecided until we reach the end, | |
4599 | * and we may need a sort stage for that. | |
4600 | * | |
4601 | * To determine whether a TEMP is keeping a return arg alive, every | |
4602 | * arg that is kept rather than copied and which has the SvTEMP flag | |
4603 | * set, has the flag temporarily unset, to mark it. At the end we scan | |
799da9d7 | 4604 | * the temps stack frame above the cut for entries without SvTEMP and |
f7a874b8 | 4605 | * keep them, while turning SvTEMP on again. Note that if we die before |
799da9d7 | 4606 | * the SvTEMPs flags are set again, its safe: at worst, subsequent use of |
f7a874b8 DM |
4607 | * those SVs may be slightly less efficient. |
4608 | * | |
4609 | * In practice various optimisations for some common cases mean we can | |
4610 | * avoid most of the scanning and swapping about with the temps stack. | |
4611 | */ | |
4612 | ||
799da9d7 | 4613 | void |
1c23e2bd | 4614 | Perl_leave_adjust_stacks(pTHX_ SV **from_sp, SV **to_sp, U8 gimme, int pass) |
a0d0e21e | 4615 | { |
263e0548 | 4616 | dVAR; |
20b7effb | 4617 | dSP; |
f7a874b8 DM |
4618 | SSize_t tmps_base; /* lowest index into tmps stack that needs freeing now */ |
4619 | SSize_t nargs; | |
4620 | ||
799da9d7 DM |
4621 | PERL_ARGS_ASSERT_LEAVE_ADJUST_STACKS; |
4622 | ||
f7a874b8 DM |
4623 | TAINT_NOT; |
4624 | ||
4625 | if (gimme == G_ARRAY) { | |
e02ce34b DM |
4626 | nargs = SP - from_sp; |
4627 | from_sp++; | |
f7a874b8 DM |
4628 | } |
4629 | else { | |
4630 | assert(gimme == G_SCALAR); | |
e02ce34b | 4631 | if (UNLIKELY(from_sp >= SP)) { |
f7a874b8 | 4632 | /* no return args */ |
e02ce34b | 4633 | assert(from_sp == SP); |
f7a874b8 DM |
4634 | EXTEND(SP, 1); |
4635 | *++SP = &PL_sv_undef; | |
e02ce34b | 4636 | to_sp = SP; |
f7a874b8 DM |
4637 | nargs = 0; |
4638 | } | |
4639 | else { | |
4640 | from_sp = SP; | |
4641 | nargs = 1; | |
4642 | } | |
4643 | } | |
4644 | ||
4645 | /* common code for G_SCALAR and G_ARRAY */ | |
4646 | ||
4647 | tmps_base = PL_tmps_floor + 1; | |
4648 | ||
4649 | assert(nargs >= 0); | |
4650 | if (nargs) { | |
4651 | /* pointer version of tmps_base. Not safe across temp stack | |
4652 | * reallocs. */ | |
4653 | SV **tmps_basep; | |
4654 | ||
4655 | EXTEND_MORTAL(nargs); /* one big extend for worst-case scenario */ | |
4656 | tmps_basep = PL_tmps_stack + tmps_base; | |
f7a874b8 DM |
4657 | |
4658 | /* process each return arg */ | |
4659 | ||
4660 | do { | |
4661 | SV *sv = *from_sp++; | |
4662 | ||
4663 | assert(PL_tmps_ix + nargs < PL_tmps_max); | |
3645bb38 DM |
4664 | #ifdef DEBUGGING |
4665 | /* PADTMPs with container set magic shouldn't appear in the | |
4666 | * wild. This assert is more important for pp_leavesublv(), | |
4667 | * but by testing for it here, we're more likely to catch | |
4668 | * bad cases (what with :lvalue subs not being widely | |
4669 | * deployed). The two issues are that for something like | |
4670 | * sub :lvalue { $tied{foo} } | |
4671 | * or | |
4672 | * sub :lvalue { substr($foo,1,2) } | |
4673 | * pp_leavesublv() will croak if the sub returns a PADTMP, | |
4674 | * and currently functions like pp_substr() return a mortal | |
4675 | * rather than using their PADTMP when returning a PVLV. | |
4676 | * This is because the PVLV will hold a ref to $foo, | |
4677 | * so $foo would get delayed in being freed while | |
4678 | * the PADTMP SV remained in the PAD. | |
4679 | * So if this assert fails it means either: | |
4680 | * 1) there is pp code similar to pp_substr that is | |
4681 | * returning a PADTMP instead of a mortal, and probably | |
4682 | * needs fixing, or | |
5d9c1c9a | 4683 | * 2) pp_leavesublv is making unwarranted assumptions |
3645bb38 DM |
4684 | * about always croaking on a PADTMP |
4685 | */ | |
4686 | if (SvPADTMP(sv) && SvSMAGICAL(sv)) { | |
4687 | MAGIC *mg; | |
4688 | for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { | |
4689 | assert(PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type)); | |
4690 | } | |
4691 | } | |
4692 | #endif | |
f7a874b8 | 4693 | |
799da9d7 DM |
4694 | if ( |
4695 | pass == 0 ? (SvTEMP(sv) && !SvMAGICAL(sv) && SvREFCNT(sv) == 1) | |
4696 | : pass == 1 ? ((SvTEMP(sv) || SvPADTMP(sv)) && !SvMAGICAL(sv) && SvREFCNT(sv) == 1) | |
4697 | : pass == 2 ? (!SvPADTMP(sv)) | |
4698 | : 1) | |
4699 | { | |
4700 | /* pass through: skip copy for logic or optimisation | |
4701 | * reasons; instead mortalise it, except that ... */ | |
e02ce34b | 4702 | *++to_sp = sv; |
f7a874b8 | 4703 | |
799da9d7 DM |
4704 | if (SvTEMP(sv)) { |
4705 | /* ... since this SV is an SvTEMP , we don't need to | |
4706 | * re-mortalise it; instead we just need to ensure | |
4707 | * that its existing entry in the temps stack frame | |
4708 | * ends up below the cut and so avoids being freed | |
4709 | * this time round. We mark it as needing to be kept | |
4710 | * by temporarily unsetting SvTEMP; then at the end, | |
4711 | * we shuffle any !SvTEMP entries on the tmps stack | |
4712 | * back below the cut. | |
4713 | * However, there's a significant chance that there's | |
4714 | * a 1:1 correspondence between the first few (or all) | |
4715 | * elements in the return args stack frame and those | |
4716 | * in the temps stack frame; e,g.: | |
4717 | * sub f { ....; map {...} .... }, | |
4718 | * or if we're exiting multiple scopes and one of the | |
4719 | * inner scopes has already made mortal copies of each | |
4720 | * return arg. | |
4721 | * | |
4722 | * If so, this arg sv will correspond to the next item | |
4723 | * on the tmps stack above the cut, and so can be kept | |
4724 | * merely by moving the cut boundary up one, rather | |
4725 | * than messing with SvTEMP. If all args are 1:1 then | |
4726 | * we can avoid the sorting stage below completely. | |
977d0c81 DM |
4727 | * |
4728 | * If there are no items above the cut on the tmps | |
4729 | * stack, then the SvTEMP must comne from an item | |
4730 | * below the cut, so there's nothing to do. | |
799da9d7 | 4731 | */ |
977d0c81 DM |
4732 | if (tmps_basep <= &PL_tmps_stack[PL_tmps_ix]) { |
4733 | if (sv == *tmps_basep) | |
4734 | tmps_basep++; | |
4735 | else | |
4736 | SvTEMP_off(sv); | |
4737 | } | |
799da9d7 | 4738 | } |
75bc488d | 4739 | else if (!SvPADTMP(sv)) { |
799da9d7 | 4740 | /* mortalise arg to avoid it being freed during save |
75bc488d | 4741 | * stack unwinding. Pad tmps don't need mortalising as |
977d0c81 DM |
4742 | * they're never freed. This is the equivalent of |
4743 | * sv_2mortal(SvREFCNT_inc(sv)), except that: | |
799da9d7 DM |
4744 | * * it assumes that the temps stack has already been |
4745 | * extended; | |
4746 | * * it puts the new item at the cut rather than at | |
4747 | * ++PL_tmps_ix, moving the previous occupant there | |
4748 | * instead. | |
4749 | */ | |
4750 | if (!SvIMMORTAL(sv)) { | |
977d0c81 | 4751 | SvREFCNT_inc_simple_void_NN(sv); |
799da9d7 | 4752 | SvTEMP_on(sv); |
977d0c81 DM |
4753 | /* Note that if there's nothing above the cut, |
4754 | * this copies the garbage one slot above | |
4755 | * PL_tmps_ix onto itself. This is harmless (the | |
4756 | * stack's already been extended), but might in | |
4757 | * theory trigger warnings from tools like ASan | |
4758 | */ | |
799da9d7 DM |
4759 | PL_tmps_stack[++PL_tmps_ix] = *tmps_basep; |
4760 | *tmps_basep++ = sv; | |
4761 | } | |
4762 | } | |
f7a874b8 DM |
4763 | } |
4764 | else { | |
4765 | /* Make a mortal copy of the SV. | |
4766 | * The following code is the equivalent of sv_mortalcopy() | |
4767 | * except that: | |
4768 | * * it assumes the temps stack has already been extended; | |
4769 | * * it optimises the copying for some simple SV types; | |
4770 | * * it puts the new item at the cut rather than at | |
4771 | * ++PL_tmps_ix, moving the previous occupant there | |
4772 | * instead. | |
4773 | */ | |
4774 | SV *newsv = newSV(0); | |
4775 | ||
4776 | PL_tmps_stack[++PL_tmps_ix] = *tmps_basep; | |
4777 | /* put it on the tmps stack early so it gets freed if we die */ | |
4778 | *tmps_basep++ = newsv; | |
e02ce34b | 4779 | *++to_sp = newsv; |
f7a874b8 DM |
4780 | |
4781 | if (SvTYPE(sv) <= SVt_IV) { | |
4782 | /* arg must be one of undef, IV/UV, or RV: skip | |
4783 | * sv_setsv_flags() and do the copy directly */ | |
4784 | U32 dstflags; | |
4785 | U32 srcflags = SvFLAGS(sv); | |
4786 | ||
4787 | assert(!SvGMAGICAL(sv)); | |
4788 | if (srcflags & (SVf_IOK|SVf_ROK)) { | |
4789 | SET_SVANY_FOR_BODYLESS_IV(newsv); | |
4790 | ||
4791 | if (srcflags & SVf_ROK) { | |
4792 | newsv->sv_u.svu_rv = SvREFCNT_inc(SvRV(sv)); | |
4793 | /* SV type plus flags */ | |
4794 | dstflags = (SVt_IV|SVf_ROK|SVs_TEMP); | |
4795 | } | |
4796 | else { | |
4797 | /* both src and dst are <= SVt_IV, so sv_any | |
4798 | * points to the head; so access the heads | |
4799 | * directly rather than going via sv_any. | |
4800 | */ | |
4801 | assert( &(sv->sv_u.svu_iv) | |
4802 | == &(((XPVIV*) SvANY(sv))->xiv_iv)); | |
4803 | assert( &(newsv->sv_u.svu_iv) | |
4804 | == &(((XPVIV*) SvANY(newsv))->xiv_iv)); | |
4805 | newsv->sv_u.svu_iv = sv->sv_u.svu_iv; | |
4806 | /* SV type plus flags */ | |
4807 | dstflags = (SVt_IV|SVf_IOK|SVp_IOK|SVs_TEMP | |
4808 | |(srcflags & SVf_IVisUV)); | |
4809 | } | |
4810 | } | |
4811 | else { | |
4812 | assert(!(srcflags & SVf_OK)); | |
4813 | dstflags = (SVt_NULL|SVs_TEMP); /* SV type plus flags */ | |
4814 | } | |
4815 | SvFLAGS(newsv) = dstflags; | |
4816 | ||
4817 | } | |
4818 | else { | |
4819 | /* do the full sv_setsv() */ | |
4820 | SSize_t old_base; | |
4821 | ||
4822 | SvTEMP_on(newsv); | |
4823 | old_base = tmps_basep - PL_tmps_stack; | |
4824 | SvGETMAGIC(sv); | |
4825 | sv_setsv_flags(newsv, sv, SV_DO_COW_SVSETSV); | |
799da9d7 | 4826 | /* the mg_get or sv_setsv might have created new temps |
f7a874b8 DM |
4827 | * or realloced the tmps stack; regrow and reload */ |
4828 | EXTEND_MORTAL(nargs); | |
4829 | tmps_basep = PL_tmps_stack + old_base; | |
4830 | TAINT_NOT; /* Each item is independent */ | |
4831 | } | |
4832 | ||
4833 | } | |
4834 | } while (--nargs); | |
4835 | ||
4836 | /* If there are any temps left above the cut, we need to sort | |
4837 | * them into those to keep and those to free. The only ones to | |
4838 | * keep are those for which we've temporarily unset SvTEMP. | |
4839 | * Work inwards from the two ends at tmps_basep .. PL_tmps_ix, | |
4840 | * swapping pairs as necessary. Stop when we meet in the middle. | |
4841 | */ | |
4842 | { | |
4843 | SV **top = PL_tmps_stack + PL_tmps_ix; | |
4844 | while (tmps_basep <= top) { | |
4845 | SV *sv = *top; | |
4846 | if (SvTEMP(sv)) | |
4847 | top--; | |
4848 | else { | |
4849 | SvTEMP_on(sv); | |
4850 | *top = *tmps_basep; | |
4851 | *tmps_basep = sv; | |
4852 | tmps_basep++; | |
4853 | } | |
4854 | } | |
4855 | } | |
4856 | ||
4857 | tmps_base = tmps_basep - PL_tmps_stack; | |
4858 | } | |
4859 | ||
e02ce34b | 4860 | PL_stack_sp = to_sp; |
f7a874b8 DM |
4861 | |
4862 | /* unrolled FREETMPS() but using tmps_base-1 rather than PL_tmps_floor */ | |
4863 | while (PL_tmps_ix >= tmps_base) { | |
4864 | SV* const sv = PL_tmps_stack[PL_tmps_ix--]; | |
4865 | #ifdef PERL_POISON | |
4866 | PoisonWith(PL_tmps_stack + PL_tmps_ix + 1, 1, SV *, 0xAB); | |
4867 | #endif | |
4868 | if (LIKELY(sv)) { | |
4869 | SvTEMP_off(sv); | |
4870 | SvREFCNT_dec_NN(sv); /* note, can modify tmps_ix!!! */ | |
4871 | } | |
4872 | } | |
4873 | } | |
4874 | ||
4875 | ||
c349b9a0 DM |
4876 | /* also tail-called by pp_return */ |
4877 | ||
f7a874b8 DM |
4878 | PP(pp_leavesub) |
4879 | { | |
1c23e2bd | 4880 | U8 gimme; |
eb578fdb | 4881 | PERL_CONTEXT *cx; |
f7a874b8 | 4882 | SV **oldsp; |
5da525e9 | 4883 | OP *retop; |
a0d0e21e | 4884 | |
4ebe6e95 | 4885 | cx = CX_CUR(); |
61d3b95a DM |
4886 | assert(CxTYPE(cx) == CXt_SUB); |
4887 | ||
4888 | if (CxMULTICALL(cx)) { | |
1f0ba93b DM |
4889 | /* entry zero of a stack is always PL_sv_undef, which |
4890 | * simplifies converting a '()' return into undef in scalar context */ | |
4891 | assert(PL_stack_sp > PL_stack_base || *PL_stack_base == &PL_sv_undef); | |
9850bf21 | 4892 | return 0; |
1f0ba93b | 4893 | } |
9850bf21 | 4894 | |
61d3b95a | 4895 | gimme = cx->blk_gimme; |
f7a874b8 | 4896 | oldsp = PL_stack_base + cx->blk_oldsp; /* last arg of previous frame */ |
1c846c1f | 4897 | |
f7a874b8 DM |
4898 | if (gimme == G_VOID) |
4899 | PL_stack_sp = oldsp; | |
4900 | else | |
e02ce34b | 4901 | leave_adjust_stacks(oldsp, oldsp, gimme, 0); |
1c846c1f | 4902 | |
2f450c1b | 4903 | CX_LEAVE_SCOPE(cx); |
a73d8813 | 4904 | cx_popsub(cx); /* Stack values are safe: release CV and @_ ... */ |
ed8ff0f3 | 4905 | cx_popblock(cx); |
5da525e9 DM |
4906 | retop = cx->blk_sub.retop; |
4907 | CX_POP(cx); | |
a0d0e21e | 4908 | |
5da525e9 | 4909 | return retop; |
a0d0e21e LW |
4910 | } |
4911 | ||
6e45d846 DM |
4912 | |
4913 | /* clear (if possible) or abandon the current @_. If 'abandon' is true, | |
4914 | * forces an abandon */ | |
4915 | ||
4916 | void | |
4917 | Perl_clear_defarray(pTHX_ AV* av, bool abandon) | |
4918 | { | |
4919 | const SSize_t fill = AvFILLp(av); | |
4920 | ||
4921 | PERL_ARGS_ASSERT_CLEAR_DEFARRAY; | |
4922 | ||
656457d0 | 4923 | if (LIKELY(!abandon && SvREFCNT(av) == 1 && !SvMAGICAL(av))) { |
c3d969bf | 4924 | av_clear(av); |
656457d0 DM |
4925 | AvREIFY_only(av); |
4926 | } | |
c3d969bf | 4927 | else { |
656457d0 DM |
4928 | AV *newav = newAV(); |
4929 | av_extend(newav, fill); | |
4930 | AvREIFY_only(newav); | |
4931 | PAD_SVl(0) = MUTABLE_SV(newav); | |
c3d969bf | 4932 | SvREFCNT_dec_NN(av); |
c3d969bf | 4933 | } |
6e45d846 DM |
4934 | } |
4935 | ||
4936 | ||
a0d0e21e LW |
4937 | PP(pp_entersub) |
4938 | { | |
20b7effb | 4939 | dSP; dPOPss; |
a0d0e21e | 4940 | GV *gv; |
eb578fdb KW |
4941 | CV *cv; |
4942 | PERL_CONTEXT *cx; | |
8ae997c5 | 4943 | I32 old_savestack_ix; |
a0d0e21e | 4944 | |
f5719c02 | 4945 | if (UNLIKELY(!sv)) |
1ff56747 DM |
4946 | goto do_die; |
4947 | ||
4948 | /* Locate the CV to call: | |
4949 | * - most common case: RV->CV: f(), $ref->(): | |
4950 | * note that if a sub is compiled before its caller is compiled, | |
4951 | * the stash entry will be a ref to a CV, rather than being a GV. | |
4952 | * - second most common case: CV: $ref->method() | |
4953 | */ | |
4954 | ||
4955 | /* a non-magic-RV -> CV ? */ | |
4956 | if (LIKELY( (SvFLAGS(sv) & (SVf_ROK|SVs_GMG)) == SVf_ROK)) { | |
4957 | cv = MUTABLE_CV(SvRV(sv)); | |
4958 | if (UNLIKELY(SvOBJECT(cv))) /* might be overloaded */ | |
4959 | goto do_ref; | |
4960 | } | |
4961 | else | |
4962 | cv = MUTABLE_CV(sv); | |
4963 | ||
4964 | /* a CV ? */ | |
4965 | if (UNLIKELY(SvTYPE(cv) != SVt_PVCV)) { | |
4966 | /* handle all the weird cases */ | |
313107ce | 4967 | switch (SvTYPE(sv)) { |
1ff56747 DM |
4968 | case SVt_PVLV: |
4969 | if (!isGV_with_GP(sv)) | |
4970 | goto do_default; | |
4971 | /* FALLTHROUGH */ | |
313107ce | 4972 | case SVt_PVGV: |
1ff56747 DM |
4973 | cv = GvCVu((const GV *)sv); |
4974 | if (UNLIKELY(!cv)) { | |
313107ce DM |
4975 | HV *stash; |
4976 | cv = sv_2cv(sv, &stash, &gv, 0); | |
1ff56747 DM |
4977 | if (!cv) { |
4978 | old_savestack_ix = PL_savestack_ix; | |
4979 | goto try_autoload; | |
4980 | } | |
313107ce DM |
4981 | } |
4982 | break; | |
1ff56747 | 4983 | |
313107ce | 4984 | default: |
1ff56747 | 4985 | do_default: |
313107ce DM |
4986 | SvGETMAGIC(sv); |
4987 | if (SvROK(sv)) { | |
1ff56747 DM |
4988 | do_ref: |
4989 | if (UNLIKELY(SvAMAGIC(sv))) { | |
313107ce DM |
4990 | sv = amagic_deref_call(sv, to_cv_amg); |
4991 | /* Don't SPAGAIN here. */ | |
4992 | } | |
4993 | } | |
4994 | else { | |
4995 | const char *sym; | |
4996 | STRLEN len; | |
1ff56747 | 4997 | if (UNLIKELY(!SvOK(sv))) |
313107ce | 4998 | DIE(aTHX_ PL_no_usym, "a subroutine"); |
1ff56747 | 4999 | |
313107ce DM |
5000 | sym = SvPV_nomg_const(sv, len); |
5001 | if (PL_op->op_private & HINT_STRICT_REFS) | |
5002 | DIE(aTHX_ "Can't use string (\"%" SVf32 "\"%s) as a subroutine ref while \"strict refs\" in use", sv, len>32 ? "..." : ""); | |
5003 | cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv)); | |
5004 | break; | |
5005 | } | |
5006 | cv = MUTABLE_CV(SvRV(sv)); | |
1ff56747 | 5007 | if (LIKELY(SvTYPE(cv) == SVt_PVCV)) |
313107ce | 5008 | break; |
924ba076 | 5009 | /* FALLTHROUGH */ |
313107ce DM |
5010 | case SVt_PVHV: |
5011 | case SVt_PVAV: | |
1ff56747 | 5012 | do_die: |
313107ce | 5013 | DIE(aTHX_ "Not a CODE reference"); |
313107ce | 5014 | } |
f5719c02 | 5015 | } |
a0d0e21e | 5016 | |
8ae997c5 | 5017 | /* At this point we want to save PL_savestack_ix, either by doing a |
a73d8813 | 5018 | * cx_pushsub(), or for XS, doing an ENTER. But we don't yet know the final |
8ae997c5 | 5019 | * CV we will be using (so we don't know whether its XS, so we can't |
a73d8813 | 5020 | * cx_pushsub() or ENTER yet), and determining cv may itself push stuff on |
8ae997c5 DM |
5021 | * the save stack. So remember where we are currently on the save |
5022 | * stack, and later update the CX or scopestack entry accordingly. */ | |
5023 | old_savestack_ix = PL_savestack_ix; | |
a0d0e21e | 5024 | |
f29834c6 DM |
5025 | /* these two fields are in a union. If they ever become separate, |
5026 | * we have to test for both of them being null below */ | |
9a28816a | 5027 | assert(cv); |
f29834c6 DM |
5028 | assert((void*)&CvROOT(cv) == (void*)&CvXSUB(cv)); |
5029 | while (UNLIKELY(!CvROOT(cv))) { | |
2f349aa0 NC |
5030 | GV* autogv; |
5031 | SV* sub_name; | |
5032 | ||
5033 | /* anonymous or undef'd function leaves us no recourse */ | |
ae77754a | 5034 | if (CvLEXICAL(cv) && CvHASGV(cv)) |
147e3846 | 5035 | DIE(aTHX_ "Undefined subroutine &%" SVf " called", |
ecf05a58 | 5036 | SVfARG(cv_name(cv, NULL, 0))); |
ae77754a | 5037 | if (CvANON(cv) || !CvHASGV(cv)) { |
2f349aa0 | 5038 | DIE(aTHX_ "Undefined subroutine called"); |
7d2057d8 | 5039 | } |
2f349aa0 NC |
5040 | |
5041 | /* autoloaded stub? */ | |
ae77754a | 5042 | if (cv != GvCV(gv = CvGV(cv))) { |
2f349aa0 NC |
5043 | cv = GvCV(gv); |
5044 | } | |
5045 | /* should call AUTOLOAD now? */ | |
5046 | else { | |
7b52d656 | 5047 | try_autoload: |
b4b431d9 | 5048 | autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), |
1de22db2 FC |
5049 | (GvNAMEUTF8(gv) ? SVf_UTF8 : 0) |
5050 | |(PL_op->op_flags & OPf_REF | |
5051 | ? GV_AUTOLOAD_ISMETHOD | |
5052 | : 0)); | |
b4b431d9 | 5053 | cv = autogv ? GvCV(autogv) : NULL; |
2f349aa0 | 5054 | } |
b4b431d9 DM |
5055 | if (!cv) { |
5056 | sub_name = sv_newmortal(); | |
5057 | gv_efullname3(sub_name, gv, NULL); | |
147e3846 | 5058 | DIE(aTHX_ "Undefined subroutine &%" SVf " called", SVfARG(sub_name)); |
b4b431d9 | 5059 | } |
a0d0e21e LW |
5060 | } |
5061 | ||
4f25d042 DM |
5062 | /* unrolled "CvCLONE(cv) && ! CvCLONED(cv)" */ |
5063 | if (UNLIKELY((CvFLAGS(cv) & (CVf_CLONE|CVf_CLONED)) == CVf_CLONE)) | |
654c6d71 DM |
5064 | DIE(aTHX_ "Closure prototype called"); |
5065 | ||
f5719c02 DM |
5066 | if (UNLIKELY((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) |
5067 | && !CvNODEBUG(cv))) | |
5068 | { | |
005a8a35 | 5069 | Perl_get_db_sub(aTHX_ &sv, cv); |
a9ef256d NC |
5070 | if (CvISXSUB(cv)) |
5071 | PL_curcopdb = PL_curcop; | |
1ad62f64 BR |
5072 | if (CvLVALUE(cv)) { |
5073 | /* check for lsub that handles lvalue subroutines */ | |
07b605e5 | 5074 | cv = GvCV(gv_fetchpvs("DB::lsub", GV_ADDMULTI, SVt_PVCV)); |
1ad62f64 BR |
5075 | /* if lsub not found then fall back to DB::sub */ |
5076 | if (!cv) cv = GvCV(PL_DBsub); | |
5077 | } else { | |
5078 | cv = GvCV(PL_DBsub); | |
5079 | } | |
a9ef256d | 5080 | |
ccafdc96 RGS |
5081 | if (!cv || (!CvXSUB(cv) && !CvSTART(cv))) |
5082 | DIE(aTHX_ "No DB::sub routine defined"); | |
67caa1fe | 5083 | } |
a0d0e21e | 5084 | |
aed2304a | 5085 | if (!(CvISXSUB(cv))) { |
f1025168 | 5086 | /* This path taken at least 75% of the time */ |
a0d0e21e | 5087 | dMARK; |
c53244ca | 5088 | PADLIST *padlist; |
3689ad62 | 5089 | I32 depth; |
44dd5d49 | 5090 | bool hasargs; |
1c23e2bd | 5091 | U8 gimme; |
f5719c02 | 5092 | |
20448bad DM |
5093 | /* keep PADTMP args alive throughout the call (we need to do this |
5094 | * because @_ isn't refcounted). Note that we create the mortals | |
5095 | * in the caller's tmps frame, so they won't be freed until after | |
5096 | * we return from the sub. | |
5097 | */ | |
91bab027 | 5098 | { |
20448bad DM |
5099 | SV **svp = MARK; |
5100 | while (svp < SP) { | |
5101 | SV *sv = *++svp; | |
5102 | if (!sv) | |
5103 | continue; | |
5104 | if (SvPADTMP(sv)) | |
5105 | *svp = sv = sv_mortalcopy(sv); | |
5106 | SvTEMP_off(sv); | |
5107 | } | |
5108 | } | |
5109 | ||
801bbf61 | 5110 | gimme = GIMME_V; |
ed8ff0f3 | 5111 | cx = cx_pushblock(CXt_SUB, gimme, MARK, old_savestack_ix); |
44dd5d49 | 5112 | hasargs = cBOOL(PL_op->op_flags & OPf_STACKED); |
a73d8813 | 5113 | cx_pushsub(cx, cv, PL_op->op_next, hasargs); |
8ae997c5 | 5114 | |
c53244ca | 5115 | padlist = CvPADLIST(cv); |
d2af2719 | 5116 | if (UNLIKELY((depth = ++CvDEPTH(cv)) >= 2)) |
3689ad62 | 5117 | pad_push(padlist, depth); |
3689ad62 | 5118 | PAD_SET_CUR_NOSAVE(padlist, depth); |
f5719c02 | 5119 | if (LIKELY(hasargs)) { |
10533ace | 5120 | AV *const av = MUTABLE_AV(PAD_SVl(0)); |
bdf02c57 DM |
5121 | SSize_t items; |
5122 | AV **defavp; | |
5123 | ||
bdf02c57 DM |
5124 | defavp = &GvAV(PL_defgv); |
5125 | cx->blk_sub.savearray = *defavp; | |
5126 | *defavp = MUTABLE_AV(SvREFCNT_inc_simple_NN(av)); | |
a0d0e21e | 5127 | |
72f28af4 DM |
5128 | /* it's the responsibility of whoever leaves a sub to ensure |
5129 | * that a clean, empty AV is left in pad[0]. This is normally | |
a73d8813 | 5130 | * done by cx_popsub() */ |
72f28af4 DM |
5131 | assert(!AvREAL(av) && AvFILLp(av) == -1); |
5132 | ||
5133 | items = SP - MARK; | |
f5719c02 | 5134 | if (UNLIKELY(items - 1 > AvMAX(av))) { |
77d27ef6 | 5135 | SV **ary = AvALLOC(av); |
77d27ef6 | 5136 | Renew(ary, items, SV*); |
00195859 | 5137 | AvMAX(av) = items - 1; |
77d27ef6 SF |
5138 | AvALLOC(av) = ary; |
5139 | AvARRAY(av) = ary; | |
5140 | } | |
5141 | ||
f14cf363 TC |
5142 | if (items) |
5143 | Copy(MARK+1,AvARRAY(av),items,SV*); | |
93965878 | 5144 | AvFILLp(av) = items - 1; |
a0d0e21e | 5145 | } |
f5719c02 DM |
5146 | if (UNLIKELY((cx->blk_u16 & OPpENTERSUB_LVAL_MASK) == OPpLVAL_INTRO && |
5147 | !CvLVALUE(cv))) | |
147e3846 | 5148 | DIE(aTHX_ "Can't modify non-lvalue subroutine call of &%" SVf, |
0f948285 | 5149 | SVfARG(cv_name(cv, NULL, 0))); |
4a925ff6 GS |
5150 | /* warning must come *after* we fully set up the context |
5151 | * stuff so that __WARN__ handlers can safely dounwind() | |
5152 | * if they want to | |
5153 | */ | |
3689ad62 | 5154 | if (UNLIKELY(depth == PERL_SUB_DEPTH_WARN |
f5719c02 DM |
5155 | && ckWARN(WARN_RECURSION) |
5156 | && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))) | |
4a925ff6 | 5157 | sub_crush_depth(cv); |
a0d0e21e LW |
5158 | RETURNOP(CvSTART(cv)); |
5159 | } | |
f1025168 | 5160 | else { |
de935cc9 | 5161 | SSize_t markix = TOPMARK; |
71d19c37 | 5162 | bool is_scalar; |
f1025168 | 5163 | |
8ae997c5 DM |
5164 | ENTER; |
5165 | /* pretend we did the ENTER earlier */ | |
5166 | PL_scopestack[PL_scopestack_ix - 1] = old_savestack_ix; | |
5167 | ||
b479c9f2 | 5168 | SAVETMPS; |
3a76ca88 | 5169 | PUTBACK; |
f1025168 | 5170 | |
f5719c02 | 5171 | if (UNLIKELY(((PL_op->op_private |
490576d1 | 5172 | & CX_PUSHSUB_GET_LVALUE_MASK(Perl_is_lvalue_sub) |
4587c532 | 5173 | ) & OPpENTERSUB_LVAL_MASK) == OPpLVAL_INTRO && |
f5719c02 | 5174 | !CvLVALUE(cv))) |
147e3846 | 5175 | DIE(aTHX_ "Can't modify non-lvalue subroutine call of &%" SVf, |
0f948285 | 5176 | SVfARG(cv_name(cv, NULL, 0))); |
4587c532 | 5177 | |
44dd5d49 | 5178 | if (UNLIKELY(!(PL_op->op_flags & OPf_STACKED) && GvAV(PL_defgv))) { |
3a76ca88 RGS |
5179 | /* Need to copy @_ to stack. Alternative may be to |
5180 | * switch stack to @_, and copy return values | |
5181 | * back. This would allow popping @_ in XSUB, e.g.. XXXX */ | |
5182 | AV * const av = GvAV(PL_defgv); | |
ad39f3a2 | 5183 | const SSize_t items = AvFILL(av) + 1; |
3a76ca88 RGS |
5184 | |
5185 | if (items) { | |
dd2a7f90 | 5186 | SSize_t i = 0; |
ad39f3a2 | 5187 | const bool m = cBOOL(SvRMAGICAL(av)); |
3a76ca88 RGS |
5188 | /* Mark is at the end of the stack. */ |
5189 | EXTEND(SP, items); | |
dd2a7f90 | 5190 | for (; i < items; ++i) |
ad39f3a2 FC |
5191 | { |
5192 | SV *sv; | |
5193 | if (m) { | |
5194 | SV ** const svp = av_fetch(av, i, 0); | |
5195 | sv = svp ? *svp : NULL; | |
5196 | } | |
5197 | else sv = AvARRAY(av)[i]; | |
5198 | if (sv) SP[i+1] = sv; | |
dd2a7f90 | 5199 | else { |
7406cffe | 5200 | SP[i+1] = av_nonelem(av, i); |
dd2a7f90 | 5201 | } |
ad39f3a2 | 5202 | } |
3a76ca88 RGS |
5203 | SP += items; |
5204 | PUTBACK ; | |
5205 | } | |
5206 | } | |
3455055f FC |
5207 | else { |
5208 | SV **mark = PL_stack_base + markix; | |
de935cc9 | 5209 | SSize_t items = SP - mark; |
3455055f FC |
5210 | while (items--) { |
5211 | mark++; | |
60779a30 | 5212 | if (*mark && SvPADTMP(*mark)) { |
3455055f | 5213 | *mark = sv_mortalcopy(*mark); |
60779a30 | 5214 | } |
3455055f FC |
5215 | } |
5216 | } | |
3a76ca88 | 5217 | /* We assume first XSUB in &DB::sub is the called one. */ |
f5719c02 | 5218 | if (UNLIKELY(PL_curcopdb)) { |
3a76ca88 RGS |
5219 | SAVEVPTR(PL_curcop); |
5220 | PL_curcop = PL_curcopdb; | |
5221 | PL_curcopdb = NULL; | |
5222 | } | |
5223 | /* Do we need to open block here? XXXX */ | |
72df79cf | 5224 | |
71d19c37 DM |
5225 | /* calculate gimme here as PL_op might get changed and then not |
5226 | * restored until the LEAVE further down */ | |
5227 | is_scalar = (GIMME_V == G_SCALAR); | |
5228 | ||
72df79cf GF |
5229 | /* CvXSUB(cv) must not be NULL because newXS() refuses NULL xsub address */ |
5230 | assert(CvXSUB(cv)); | |
16c91539 | 5231 | CvXSUB(cv)(aTHX_ cv); |
3a76ca88 | 5232 | |
cfbdacd3 TC |
5233 | #if defined DEBUGGING && !defined DEBUGGING_RE_ONLY |
5234 | /* This duplicates the check done in runops_debug(), but provides more | |
5235 | * information in the common case of the fault being with an XSUB. | |
5236 | * | |
5237 | * It should also catch an XSUB pushing more than it extends | |
5238 | * in scalar context. | |
5239 | */ | |
5240 | if (PL_curstackinfo->si_stack_hwm < PL_stack_sp - PL_stack_base) | |
5241 | Perl_croak_nocontext( | |
5242 | "panic: XSUB %s::%s (%s) failed to extend arg stack: " | |
5243 | "base=%p, sp=%p, hwm=%p\n", | |
5244 | HvNAME(GvSTASH(CvGV(cv))), GvNAME(CvGV(cv)), CvFILE(cv), | |
5245 | PL_stack_base, PL_stack_sp, | |
5246 | PL_stack_base + PL_curstackinfo->si_stack_hwm); | |
5247 | #endif | |
3a76ca88 | 5248 | /* Enforce some sanity in scalar context. */ |
71d19c37 | 5249 | if (is_scalar) { |
89a18b40 DM |
5250 | SV **svp = PL_stack_base + markix + 1; |
5251 | if (svp != PL_stack_sp) { | |
5252 | *svp = svp > PL_stack_sp ? &PL_sv_undef : *PL_stack_sp; | |
5253 | PL_stack_sp = svp; | |
5254 | } | |
3a76ca88 | 5255 | } |
a57c6685 | 5256 | LEAVE; |
f1025168 NC |
5257 | return NORMAL; |
5258 | } | |
a0d0e21e LW |
5259 | } |
5260 | ||
44a8e56a | 5261 | void |
864dbfa3 | 5262 | Perl_sub_crush_depth(pTHX_ CV *cv) |
44a8e56a | 5263 | { |
7918f24d NC |
5264 | PERL_ARGS_ASSERT_SUB_CRUSH_DEPTH; |
5265 | ||
44a8e56a | 5266 | if (CvANON(cv)) |
9014280d | 5267 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine"); |
44a8e56a | 5268 | else { |
147e3846 | 5269 | Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%" SVf "\"", |
ecf05a58 | 5270 | SVfARG(cv_name(cv,NULL,0))); |
44a8e56a | 5271 | } |
5272 | } | |
5273 | ||
4fa06845 DM |
5274 | |
5275 | ||
5276 | /* like croak, but report in context of caller */ | |
5277 | ||
5278 | void | |
5279 | Perl_croak_caller(const char *pat, ...) | |
5280 | { | |
5281 | dTHX; | |
5282 | va_list args; | |
5283 | const PERL_CONTEXT *cx = caller_cx(0, NULL); | |
5284 | ||
5285 | /* make error appear at call site */ | |
5286 | assert(cx); | |
5287 | PL_curcop = cx->blk_oldcop; | |
5288 | ||
5289 | va_start(args, pat); | |
5290 | vcroak(pat, &args); | |
5291 | NOT_REACHED; /* NOTREACHED */ | |
5292 | va_end(args); | |
5293 | } | |
5294 | ||
5295 | ||
a0d0e21e LW |
5296 | PP(pp_aelem) |
5297 | { | |
20b7effb | 5298 | dSP; |
a0d0e21e | 5299 | SV** svp; |
a3b680e6 | 5300 | SV* const elemsv = POPs; |
d804643f | 5301 | IV elem = SvIV(elemsv); |
502c6561 | 5302 | AV *const av = MUTABLE_AV(POPs); |
e1ec3a88 | 5303 | const U32 lval = PL_op->op_flags & OPf_MOD || LVRET; |
bbfdc870 | 5304 | const U32 defer = PL_op->op_private & OPpLVAL_DEFER; |
4ad10a0b VP |
5305 | const bool localizing = PL_op->op_private & OPpLVAL_INTRO; |
5306 | bool preeminent = TRUE; | |
be6c24e0 | 5307 | SV *sv; |
a0d0e21e | 5308 | |
5d9574c1 | 5309 | if (UNLIKELY(SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))) |
95b63a38 | 5310 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
147e3846 | 5311 | "Use of reference \"%" SVf "\" as array index", |
be2597df | 5312 | SVfARG(elemsv)); |
5d9574c1 | 5313 | if (UNLIKELY(SvTYPE(av) != SVt_PVAV)) |
a0d0e21e | 5314 | RETPUSHUNDEF; |
4ad10a0b | 5315 | |
5d9574c1 | 5316 | if (UNLIKELY(localizing)) { |
4ad10a0b VP |
5317 | MAGIC *mg; |
5318 | HV *stash; | |
5319 | ||
5320 | /* If we can determine whether the element exist, | |
5321 | * Try to preserve the existenceness of a tied array | |
5322 | * element by using EXISTS and DELETE if possible. | |
5323 | * Fallback to FETCH and STORE otherwise. */ | |
5324 | if (SvCANEXISTDELETE(av)) | |
5325 | preeminent = av_exists(av, elem); | |
5326 | } | |
5327 | ||
68dc0745 | 5328 | svp = av_fetch(av, elem, lval && !defer); |
a0d0e21e | 5329 | if (lval) { |
2b573ace | 5330 | #ifdef PERL_MALLOC_WRAP |
2b573ace | 5331 | if (SvUOK(elemsv)) { |
a9c4fd4e | 5332 | const UV uv = SvUV(elemsv); |
2b573ace JH |
5333 | elem = uv > IV_MAX ? IV_MAX : uv; |
5334 | } | |
5335 | else if (SvNOK(elemsv)) | |
5336 | elem = (IV)SvNV(elemsv); | |
a3b680e6 | 5337 | if (elem > 0) { |
814eedc8 | 5338 | MEM_WRAP_CHECK_s(elem,SV*,"Out of memory during array extend"); |
a3b680e6 | 5339 | } |
2b573ace | 5340 | #endif |
ce0d59fd | 5341 | if (!svp || !*svp) { |
bbfdc870 | 5342 | IV len; |
68dc0745 | 5343 | if (!defer) |
cea2e8a9 | 5344 | DIE(aTHX_ PL_no_aelem, elem); |
b9f2b683 | 5345 | len = av_tindex(av); |
9ef753fe FC |
5346 | /* Resolve a negative index that falls within the array. Leave |
5347 | it negative it if falls outside the array. */ | |
5348 | if (elem < 0 && len + elem >= 0) | |
5349 | elem = len + elem; | |
5350 | if (elem >= 0 && elem <= len) | |
5351 | /* Falls within the array. */ | |
5352 | PUSHs(av_nonelem(av,elem)); | |
5353 | else | |
5354 | /* Falls outside the array. If it is negative, | |
5355 | magic_setdefelem will use the index for error reporting. | |
5356 | */ | |
5357 | mPUSHs(newSVavdefelem(av, elem, 1)); | |
68dc0745 | 5358 | RETURN; |
5359 | } | |
5d9574c1 | 5360 | if (UNLIKELY(localizing)) { |
4ad10a0b VP |
5361 | if (preeminent) |
5362 | save_aelem(av, elem, svp); | |
5363 | else | |
5364 | SAVEADELETE(av, elem); | |
5365 | } | |
9026059d GG |
5366 | else if (PL_op->op_private & OPpDEREF) { |
5367 | PUSHs(vivify_ref(*svp, PL_op->op_private & OPpDEREF)); | |
5368 | RETURN; | |
5369 | } | |
a0d0e21e | 5370 | } |
3280af22 | 5371 | sv = (svp ? *svp : &PL_sv_undef); |
39cf747a | 5372 | if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */ |
fd69380d | 5373 | mg_get(sv); |
be6c24e0 | 5374 | PUSHs(sv); |
a0d0e21e LW |
5375 | RETURN; |
5376 | } | |
5377 | ||
9026059d | 5378 | SV* |
864dbfa3 | 5379 | Perl_vivify_ref(pTHX_ SV *sv, U32 to_what) |
02a9e968 | 5380 | { |
7918f24d NC |
5381 | PERL_ARGS_ASSERT_VIVIFY_REF; |
5382 | ||
5b295bef | 5383 | SvGETMAGIC(sv); |
02a9e968 CS |
5384 | if (!SvOK(sv)) { |
5385 | if (SvREADONLY(sv)) | |
cb077ed2 | 5386 | Perl_croak_no_modify(); |
43230e26 | 5387 | prepare_SV_for_RV(sv); |
68dc0745 | 5388 | switch (to_what) { |
5f05dabc | 5389 | case OPpDEREF_SV: |
561b68a9 | 5390 | SvRV_set(sv, newSV(0)); |
5f05dabc | 5391 | break; |
5392 | case OPpDEREF_AV: | |
ad64d0ec | 5393 | SvRV_set(sv, MUTABLE_SV(newAV())); |
5f05dabc | 5394 | break; |
5395 | case OPpDEREF_HV: | |
ad64d0ec | 5396 | SvRV_set(sv, MUTABLE_SV(newHV())); |
5f05dabc | 5397 | break; |
5398 | } | |
02a9e968 CS |
5399 | SvROK_on(sv); |
5400 | SvSETMAGIC(sv); | |
7e482323 | 5401 | SvGETMAGIC(sv); |
02a9e968 | 5402 | } |
9026059d GG |
5403 | if (SvGMAGICAL(sv)) { |
5404 | /* copy the sv without magic to prevent magic from being | |
5405 | executed twice */ | |
5406 | SV* msv = sv_newmortal(); | |
5407 | sv_setsv_nomg(msv, sv); | |
5408 | return msv; | |
5409 | } | |
5410 | return sv; | |
02a9e968 CS |
5411 | } |
5412 | ||
7d6c333c | 5413 | PERL_STATIC_INLINE HV * |
5414 | S_opmethod_stash(pTHX_ SV* meth) | |
f5d5a27c | 5415 | { |
a0d0e21e | 5416 | SV* ob; |
56304f61 | 5417 | HV* stash; |
b55b14d0 | 5418 | |
d648ffcb | 5419 | SV* const sv = PL_stack_base + TOPMARK == PL_stack_sp |
147e3846 | 5420 | ? (Perl_croak(aTHX_ "Can't call method \"%" SVf "\" without a " |
f226e9be FC |
5421 | "package or object reference", SVfARG(meth)), |
5422 | (SV *)NULL) | |
5423 | : *(PL_stack_base + TOPMARK + 1); | |
f5d5a27c | 5424 | |
7d6c333c | 5425 | PERL_ARGS_ASSERT_OPMETHOD_STASH; |
d648ffcb | 5426 | |
5d9574c1 | 5427 | if (UNLIKELY(!sv)) |
7156e69a | 5428 | undefined: |
147e3846 | 5429 | Perl_croak(aTHX_ "Can't call method \"%" SVf "\" on an undefined value", |
a214957f | 5430 | SVfARG(meth)); |
4f1b7578 | 5431 | |
d648ffcb | 5432 | if (UNLIKELY(SvGMAGICAL(sv))) mg_get(sv); |
5433 | else if (SvIsCOW_shared_hash(sv)) { /* MyClass->meth() */ | |
5434 | stash = gv_stashsv(sv, GV_CACHE_ONLY); | |
7d6c333c | 5435 | if (stash) return stash; |
d648ffcb | 5436 | } |
5437 | ||
a0d0e21e | 5438 | if (SvROK(sv)) |
ad64d0ec | 5439 | ob = MUTABLE_SV(SvRV(sv)); |
7156e69a | 5440 | else if (!SvOK(sv)) goto undefined; |
a77c16f7 FC |
5441 | else if (isGV_with_GP(sv)) { |
5442 | if (!GvIO(sv)) | |
147e3846 | 5443 | Perl_croak(aTHX_ "Can't call method \"%" SVf "\" " |
a77c16f7 FC |
5444 | "without a package or object reference", |
5445 | SVfARG(meth)); | |
5446 | ob = sv; | |
5447 | if (SvTYPE(ob) == SVt_PVLV && LvTYPE(ob) == 'y') { | |
5448 | assert(!LvTARGLEN(ob)); | |
5449 | ob = LvTARG(ob); | |
5450 | assert(ob); | |
5451 | } | |
5452 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(ob)); | |
5453 | } | |
a0d0e21e | 5454 | else { |
89269094 | 5455 | /* this isn't a reference */ |
a0d0e21e | 5456 | GV* iogv; |
f937af42 | 5457 | STRLEN packlen; |
89269094 | 5458 | const char * const packname = SvPV_nomg_const(sv, packlen); |
d283e876 | 5459 | const U32 packname_utf8 = SvUTF8(sv); |
5460 | stash = gv_stashpvn(packname, packlen, packname_utf8 | GV_CACHE_ONLY); | |
7d6c333c | 5461 | if (stash) return stash; |
081fc587 | 5462 | |
89269094 | 5463 | if (!(iogv = gv_fetchpvn_flags( |
d283e876 | 5464 | packname, packlen, packname_utf8, SVt_PVIO |
da6b625f | 5465 | )) || |
ad64d0ec | 5466 | !(ob=MUTABLE_SV(GvIO(iogv)))) |
a0d0e21e | 5467 | { |
af09ea45 | 5468 | /* this isn't the name of a filehandle either */ |
89269094 | 5469 | if (!packlen) |
834a4ddd | 5470 | { |
147e3846 | 5471 | Perl_croak(aTHX_ "Can't call method \"%" SVf "\" " |
7156e69a FC |
5472 | "without a package or object reference", |
5473 | SVfARG(meth)); | |
834a4ddd | 5474 | } |
af09ea45 | 5475 | /* assume it's a package name */ |
d283e876 | 5476 | stash = gv_stashpvn(packname, packlen, packname_utf8); |
7d6c333c | 5477 | if (stash) return stash; |
5478 | else return MUTABLE_HV(sv); | |
a0d0e21e | 5479 | } |
af09ea45 | 5480 | /* it _is_ a filehandle name -- replace with a reference */ |
ad64d0ec | 5481 | *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(MUTABLE_SV(iogv))); |
a0d0e21e LW |
5482 | } |
5483 | ||
1f3ffe4c | 5484 | /* if we got here, ob should be an object or a glob */ |
f0d43078 | 5485 | if (!ob || !(SvOBJECT(ob) |
a77c16f7 | 5486 | || (isGV_with_GP(ob) |
159b6efe | 5487 | && (ob = MUTABLE_SV(GvIO((const GV *)ob))) |
f0d43078 GS |
5488 | && SvOBJECT(ob)))) |
5489 | { | |
147e3846 | 5490 | Perl_croak(aTHX_ "Can't call method \"%" SVf "\" on unblessed reference", |
323dbd00 | 5491 | SVfARG((SvPOK(meth) && SvPVX(meth) == PL_isa_DOES) |
b375e37b BF |
5492 | ? newSVpvs_flags("DOES", SVs_TEMP) |
5493 | : meth)); | |
f0d43078 | 5494 | } |
a0d0e21e | 5495 | |
7d6c333c | 5496 | return SvSTASH(ob); |
5497 | } | |
5498 | ||
5499 | PP(pp_method) | |
5500 | { | |
5501 | dSP; | |
5502 | GV* gv; | |
5503 | HV* stash; | |
5504 | SV* const meth = TOPs; | |
5505 | ||
5506 | if (SvROK(meth)) { | |
5507 | SV* const rmeth = SvRV(meth); | |
5508 | if (SvTYPE(rmeth) == SVt_PVCV) { | |
5509 | SETs(rmeth); | |
5510 | RETURN; | |
5511 | } | |
5512 | } | |
a0d0e21e | 5513 | |
7d6c333c | 5514 | stash = opmethod_stash(meth); |
af09ea45 | 5515 | |
7d6c333c | 5516 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK); |
5517 | assert(gv); | |
5518 | ||
5519 | SETs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
5520 | RETURN; | |
5521 | } | |
5522 | ||
810bd8b7 | 5523 | #define METHOD_CHECK_CACHE(stash,cache,meth) \ |
5524 | const HE* const he = hv_fetch_ent(cache, meth, 0, 0); \ | |
5525 | if (he) { \ | |
5526 | gv = MUTABLE_GV(HeVAL(he)); \ | |
5527 | if (isGV(gv) && GvCV(gv) && (!GvCVGEN(gv) || GvCVGEN(gv) \ | |
5528 | == (PL_sub_generation + HvMROMETA(stash)->cache_gen))) \ | |
5529 | { \ | |
5530 | XPUSHs(MUTABLE_SV(GvCV(gv))); \ | |
5531 | RETURN; \ | |
5532 | } \ | |
5533 | } \ | |
5534 | ||
7d6c333c | 5535 | PP(pp_method_named) |
5536 | { | |
5537 | dSP; | |
5538 | GV* gv; | |
5539 | SV* const meth = cMETHOPx_meth(PL_op); | |
5540 | HV* const stash = opmethod_stash(meth); | |
5541 | ||
5542 | if (LIKELY(SvTYPE(stash) == SVt_PVHV)) { | |
810bd8b7 | 5543 | METHOD_CHECK_CACHE(stash, stash, meth); |
f5d5a27c CS |
5544 | } |
5545 | ||
7d6c333c | 5546 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK); |
256d1bb2 | 5547 | assert(gv); |
9b9d0b15 | 5548 | |
7d6c333c | 5549 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); |
5550 | RETURN; | |
5551 | } | |
5552 | ||
5553 | PP(pp_method_super) | |
5554 | { | |
5555 | dSP; | |
5556 | GV* gv; | |
5557 | HV* cache; | |
5558 | SV* const meth = cMETHOPx_meth(PL_op); | |
5559 | HV* const stash = CopSTASH(PL_curcop); | |
5560 | /* Actually, SUPER doesn't need real object's (or class') stash at all, | |
5561 | * as it uses CopSTASH. However, we must ensure that object(class) is | |
5562 | * correct (this check is done by S_opmethod_stash) */ | |
5563 | opmethod_stash(meth); | |
5564 | ||
5565 | if ((cache = HvMROMETA(stash)->super)) { | |
810bd8b7 | 5566 | METHOD_CHECK_CACHE(stash, cache, meth); |
5567 | } | |
5568 | ||
5569 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK|GV_SUPER); | |
5570 | assert(gv); | |
5571 | ||
5572 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
5573 | RETURN; | |
5574 | } | |
5575 | ||
5576 | PP(pp_method_redir) | |
5577 | { | |
5578 | dSP; | |
5579 | GV* gv; | |
5580 | SV* const meth = cMETHOPx_meth(PL_op); | |
5581 | HV* stash = gv_stashsv(cMETHOPx_rclass(PL_op), 0); | |
5582 | opmethod_stash(meth); /* not used but needed for error checks */ | |
5583 | ||
5584 | if (stash) { METHOD_CHECK_CACHE(stash, stash, meth); } | |
5585 | else stash = MUTABLE_HV(cMETHOPx_rclass(PL_op)); | |
5586 | ||
5587 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK); | |
5588 | assert(gv); | |
5589 | ||
5590 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
5591 | RETURN; | |
5592 | } | |
5593 | ||
5594 | PP(pp_method_redir_super) | |
5595 | { | |
5596 | dSP; | |
5597 | GV* gv; | |
5598 | HV* cache; | |
5599 | SV* const meth = cMETHOPx_meth(PL_op); | |
5600 | HV* stash = gv_stashsv(cMETHOPx_rclass(PL_op), 0); | |
5601 | opmethod_stash(meth); /* not used but needed for error checks */ | |
5602 | ||
5603 | if (UNLIKELY(!stash)) stash = MUTABLE_HV(cMETHOPx_rclass(PL_op)); | |
5604 | else if ((cache = HvMROMETA(stash)->super)) { | |
5605 | METHOD_CHECK_CACHE(stash, cache, meth); | |
7d6c333c | 5606 | } |
5607 | ||
5608 | gv = gv_fetchmethod_sv_flags(stash, meth, GV_AUTOLOAD|GV_CROAK|GV_SUPER); | |
5609 | assert(gv); | |
5610 | ||
5611 | XPUSHs(isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv)); | |
5612 | RETURN; | |
a0d0e21e | 5613 | } |
241d1a3b NC |
5614 | |
5615 | /* | |
14d04a33 | 5616 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 5617 | */ |