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CommitLineData
a0d0e21e 1/* pp.c
79072805 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
79072805 5 *
a0d0e21e
LW
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.
79072805 8 *
a0d0e21e
LW
9 */
10
11/*
4ac71550
TC
12 * 'It's a big house this, and very peculiar. Always a bit more
13 * to discover, and no knowing what you'll find round a corner.
14 * And Elves, sir!' --Samwise Gamgee
15 *
16 * [p.225 of _The Lord of the Rings_, II/i: "Many Meetings"]
a0d0e21e 17 */
79072805 18
166f8a29
DM
19/* This file contains general pp ("push/pop") functions that execute the
20 * opcodes that make up a perl program. A typical pp function expects to
21 * find its arguments on the stack, and usually pushes its results onto
22 * the stack, hence the 'pp' terminology. Each OP structure contains
23 * a pointer to the relevant pp_foo() function.
24 */
25
79072805 26#include "EXTERN.h"
864dbfa3 27#define PERL_IN_PP_C
79072805 28#include "perl.h"
77bc9082 29#include "keywords.h"
79072805 30
a4af207c 31#include "reentr.h"
685289b5 32#include "regcharclass.h"
a4af207c 33
dfe9444c
AD
34/* XXX I can't imagine anyone who doesn't have this actually _needs_
35 it, since pid_t is an integral type.
36 --AD 2/20/1998
37*/
38#ifdef NEED_GETPID_PROTO
39extern Pid_t getpid (void);
8ac85365
NIS
40#endif
41
0630166f
SP
42/*
43 * Some BSDs and Cygwin default to POSIX math instead of IEEE.
44 * This switches them over to IEEE.
45 */
46#if defined(LIBM_LIB_VERSION)
47 _LIB_VERSION_TYPE _LIB_VERSION = _IEEE_;
48#endif
49
a78bc3c6
KW
50static const STRLEN small_mu_len = sizeof(GREEK_SMALL_LETTER_MU_UTF8) - 1;
51static const STRLEN capital_iota_len = sizeof(GREEK_CAPITAL_LETTER_IOTA_UTF8) - 1;
52
13017935
SM
53/* variations on pp_null */
54
93a17b20
LW
55PP(pp_stub)
56{
39644a26 57 dSP;
54310121 58 if (GIMME_V == G_SCALAR)
3280af22 59 XPUSHs(&PL_sv_undef);
93a17b20
LW
60 RETURN;
61}
62
79072805
LW
63/* Pushy stuff. */
64
bdaf10a5 65/* This is also called directly by pp_lvavref. */
93a17b20
LW
66PP(pp_padav)
67{
20b7effb 68 dSP; dTARGET;
13017935 69 I32 gimme;
e190e9b4 70 assert(SvTYPE(TARG) == SVt_PVAV);
3dbcc5e0
SM
71 if (UNLIKELY( PL_op->op_private & OPpLVAL_INTRO ))
72 if (LIKELY( !(PL_op->op_private & OPpPAD_STATE) ))
a5911867 73 SAVECLEARSV(PAD_SVl(PL_op->op_targ));
85e6fe83 74 EXTEND(SP, 1);
533c011a 75 if (PL_op->op_flags & OPf_REF) {
85e6fe83 76 PUSHs(TARG);
93a17b20 77 RETURN;
40c94d11
FC
78 } else if (PL_op->op_private & OPpMAYBE_LVSUB) {
79 const I32 flags = is_lvalue_sub();
80 if (flags && !(flags & OPpENTERSUB_INARGS)) {
82334630 81 if (GIMME_V == G_SCALAR)
a84828f3 82 /* diag_listed_as: Can't return %s to lvalue scalar context */
78f9721b
SM
83 Perl_croak(aTHX_ "Can't return array to lvalue scalar context");
84 PUSHs(TARG);
85 RETURN;
40c94d11 86 }
85e6fe83 87 }
13017935
SM
88 gimme = GIMME_V;
89 if (gimme == G_ARRAY) {
d5524600 90 /* XXX see also S_pushav in pp_hot.c */
c70927a6 91 const Size_t maxarg = AvFILL(MUTABLE_AV(TARG)) + 1;
85e6fe83 92 EXTEND(SP, maxarg);
93965878 93 if (SvMAGICAL(TARG)) {
c70927a6
FC
94 Size_t i;
95 for (i=0; i < maxarg; i++) {
502c6561 96 SV * const * const svp = av_fetch(MUTABLE_AV(TARG), i, FALSE);
3280af22 97 SP[i+1] = (svp) ? *svp : &PL_sv_undef;
93965878
NIS
98 }
99 }
100 else {
428ccf1e
FC
101 PADOFFSET i;
102 for (i=0; i < (PADOFFSET)maxarg; i++) {
103 SV * const sv = AvARRAY((const AV *)TARG)[i];
104 SP[i+1] = sv ? sv : &PL_sv_undef;
105 }
93965878 106 }
85e6fe83
LW
107 SP += maxarg;
108 }
13017935 109 else if (gimme == G_SCALAR) {
1b6737cc 110 SV* const sv = sv_newmortal();
c70927a6 111 const SSize_t maxarg = AvFILL(MUTABLE_AV(TARG)) + 1;
85e6fe83
LW
112 sv_setiv(sv, maxarg);
113 PUSHs(sv);
114 }
115 RETURN;
93a17b20
LW
116}
117
118PP(pp_padhv)
119{
20b7effb 120 dSP; dTARGET;
54310121
PP
121 I32 gimme;
122
e190e9b4 123 assert(SvTYPE(TARG) == SVt_PVHV);
93a17b20 124 XPUSHs(TARG);
3dbcc5e0
SM
125 if (UNLIKELY( PL_op->op_private & OPpLVAL_INTRO ))
126 if (LIKELY( !(PL_op->op_private & OPpPAD_STATE) ))
a5911867 127 SAVECLEARSV(PAD_SVl(PL_op->op_targ));
533c011a 128 if (PL_op->op_flags & OPf_REF)
93a17b20 129 RETURN;
40c94d11
FC
130 else if (PL_op->op_private & OPpMAYBE_LVSUB) {
131 const I32 flags = is_lvalue_sub();
132 if (flags && !(flags & OPpENTERSUB_INARGS)) {
82334630 133 if (GIMME_V == G_SCALAR)
a84828f3 134 /* diag_listed_as: Can't return %s to lvalue scalar context */
78f9721b
SM
135 Perl_croak(aTHX_ "Can't return hash to lvalue scalar context");
136 RETURN;
40c94d11 137 }
78f9721b 138 }
54310121
PP
139 gimme = GIMME_V;
140 if (gimme == G_ARRAY) {
981b7185 141 RETURNOP(Perl_do_kv(aTHX));
85e6fe83 142 }
c8fe3bdf 143 else if ((PL_op->op_private & OPpTRUEBOOL
adc42c31 144 || ( PL_op->op_private & OPpMAYBE_TRUEBOOL
c8fe3bdf
FC
145 && block_gimme() == G_VOID ))
146 && (!SvRMAGICAL(TARG) || !mg_find(TARG, PERL_MAGIC_tied)))
147 SETs(HvUSEDKEYS(TARG) ? &PL_sv_yes : sv_2mortal(newSViv(0)));
54310121 148 else if (gimme == G_SCALAR) {
85fbaab2 149 SV* const sv = Perl_hv_scalar(aTHX_ MUTABLE_HV(TARG));
85e6fe83 150 SETs(sv);
85e6fe83 151 }
54310121 152 RETURN;
93a17b20
LW
153}
154
ac217057
FC
155PP(pp_padcv)
156{
20b7effb 157 dSP; dTARGET;
97b03d64
FC
158 assert(SvTYPE(TARG) == SVt_PVCV);
159 XPUSHs(TARG);
160 RETURN;
ac217057
FC
161}
162
ecf9c8b7
FC
163PP(pp_introcv)
164{
20b7effb 165 dTARGET;
6d5c2147
FC
166 SvPADSTALE_off(TARG);
167 return NORMAL;
ecf9c8b7
FC
168}
169
13f89586
FC
170PP(pp_clonecv)
171{
20b7effb 172 dTARGET;
0f94cb1f
FC
173 CV * const protocv = PadnamePROTOCV(
174 PadlistNAMESARRAY(CvPADLIST(find_runcv(NULL)))[ARGTARG]
175 );
6d5c2147 176 assert(SvTYPE(TARG) == SVt_PVCV);
0f94cb1f
FC
177 assert(protocv);
178 if (CvISXSUB(protocv)) { /* constant */
6d5c2147 179 /* XXX Should we clone it here? */
6d5c2147
FC
180 /* If this changes to use SAVECLEARSV, we can move the SAVECLEARSV
181 to introcv and remove the SvPADSTALE_off. */
182 SAVEPADSVANDMORTALIZE(ARGTARG);
0f94cb1f 183 PAD_SVl(ARGTARG) = SvREFCNT_inc_simple_NN(protocv);
6d5c2147
FC
184 }
185 else {
0f94cb1f
FC
186 if (CvROOT(protocv)) {
187 assert(CvCLONE(protocv));
188 assert(!CvCLONED(protocv));
6d5c2147 189 }
0f94cb1f 190 cv_clone_into(protocv,(CV *)TARG);
6d5c2147
FC
191 SAVECLEARSV(PAD_SVl(ARGTARG));
192 }
193 return NORMAL;
13f89586
FC
194}
195
79072805
LW
196/* Translations. */
197
6f7909da
FC
198/* In some cases this function inspects PL_op. If this function is called
199 for new op types, more bool parameters may need to be added in place of
200 the checks.
201
202 When noinit is true, the absence of a gv will cause a retval of undef.
203 This is unrelated to the cv-to-gv assignment case.
6f7909da
FC
204*/
205
206static SV *
207S_rv2gv(pTHX_ SV *sv, const bool vivify_sv, const bool strict,
208 const bool noinit)
209{
f64c9ac5 210 if (!isGV(sv) || SvFAKE(sv)) SvGETMAGIC(sv);
ed6116ce 211 if (SvROK(sv)) {
93d7320b
DM
212 if (SvAMAGIC(sv)) {
213 sv = amagic_deref_call(sv, to_gv_amg);
93d7320b 214 }
e4a1664f 215 wasref:
ed6116ce 216 sv = SvRV(sv);
b1dadf13 217 if (SvTYPE(sv) == SVt_PVIO) {
159b6efe 218 GV * const gv = MUTABLE_GV(sv_newmortal());
885f468a 219 gv_init(gv, 0, "__ANONIO__", 10, 0);
a45c7426 220 GvIOp(gv) = MUTABLE_IO(sv);
b37c2d43 221 SvREFCNT_inc_void_NN(sv);
ad64d0ec 222 sv = MUTABLE_SV(gv);
ef54e1a4 223 }
81d52ecd
JH
224 else if (!isGV_with_GP(sv)) {
225 Perl_die(aTHX_ "Not a GLOB reference");
226 }
79072805
LW
227 }
228 else {
6e592b3a 229 if (!isGV_with_GP(sv)) {
f132ae69 230 if (!SvOK(sv)) {
b13b2135 231 /* If this is a 'my' scalar and flag is set then vivify
853846ea 232 * NI-S 1999/05/07
b13b2135 233 */
f132ae69 234 if (vivify_sv && sv != &PL_sv_undef) {
2c8ac474 235 GV *gv;
ce74145d 236 if (SvREADONLY(sv))
cb077ed2 237 Perl_croak_no_modify();
2c8ac474 238 if (cUNOP->op_targ) {
0bd48802 239 SV * const namesv = PAD_SV(cUNOP->op_targ);
94e7eb6f
FC
240 HV *stash = CopSTASH(PL_curcop);
241 if (SvTYPE(stash) != SVt_PVHV) stash = NULL;
159b6efe 242 gv = MUTABLE_GV(newSV(0));
94e7eb6f 243 gv_init_sv(gv, stash, namesv, 0);
2c8ac474
GS
244 }
245 else {
0bd48802 246 const char * const name = CopSTASHPV(PL_curcop);
6b10071b 247 gv = newGVgen_flags(name,
d14578b8 248 HvNAMEUTF8(CopSTASH(PL_curcop)) ? SVf_UTF8 : 0 );
7bdb4ff0 249 SvREFCNT_inc_simple_void_NN(gv);
1d8d4d2a 250 }
43230e26 251 prepare_SV_for_RV(sv);
ad64d0ec 252 SvRV_set(sv, MUTABLE_SV(gv));
853846ea 253 SvROK_on(sv);
1d8d4d2a 254 SvSETMAGIC(sv);
853846ea 255 goto wasref;
2c8ac474 256 }
81d52ecd
JH
257 if (PL_op->op_flags & OPf_REF || strict) {
258 Perl_die(aTHX_ PL_no_usym, "a symbol");
259 }
599cee73 260 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 261 report_uninit(sv);
6f7909da 262 return &PL_sv_undef;
a0d0e21e 263 }
6f7909da 264 if (noinit)
35cd451c 265 {
77cb3b01
FC
266 if (!(sv = MUTABLE_SV(gv_fetchsv_nomg(
267 sv, GV_ADDMG, SVt_PVGV
23496c6e 268 ))))
6f7909da 269 return &PL_sv_undef;
35cd451c
GS
270 }
271 else {
81d52ecd
JH
272 if (strict) {
273 Perl_die(aTHX_
fedf30e1 274 PL_no_symref_sv,
81d52ecd
JH
275 sv,
276 (SvPOKp(sv) && SvCUR(sv)>32 ? "..." : ""),
277 "a symbol"
278 );
279 }
e26df76a
NC
280 if ((PL_op->op_private & (OPpLVAL_INTRO|OPpDONT_INIT_GV))
281 == OPpDONT_INIT_GV) {
282 /* We are the target of a coderef assignment. Return
283 the scalar unchanged, and let pp_sasssign deal with
284 things. */
6f7909da 285 return sv;
e26df76a 286 }
77cb3b01 287 sv = MUTABLE_SV(gv_fetchsv_nomg(sv, GV_ADD, SVt_PVGV));
35cd451c 288 }
2acc3314 289 /* FAKE globs in the symbol table cause weird bugs (#77810) */
96293f45 290 SvFAKE_off(sv);
93a17b20 291 }
79072805 292 }
8dc99089 293 if (SvFAKE(sv) && !(PL_op->op_private & OPpALLOW_FAKE)) {
2acc3314 294 SV *newsv = sv_newmortal();
5cf4b255 295 sv_setsv_flags(newsv, sv, 0);
2acc3314 296 SvFAKE_off(newsv);
d8906c05 297 sv = newsv;
2acc3314 298 }
6f7909da
FC
299 return sv;
300}
301
302PP(pp_rv2gv)
303{
20b7effb 304 dSP; dTOPss;
6f7909da
FC
305
306 sv = S_rv2gv(aTHX_
307 sv, PL_op->op_private & OPpDEREF,
308 PL_op->op_private & HINT_STRICT_REFS,
309 ((PL_op->op_flags & OPf_SPECIAL) && !(PL_op->op_flags & OPf_MOD))
310 || PL_op->op_type == OP_READLINE
311 );
d8906c05
FC
312 if (PL_op->op_private & OPpLVAL_INTRO)
313 save_gp(MUTABLE_GV(sv), !(PL_op->op_flags & OPf_SPECIAL));
314 SETs(sv);
79072805
LW
315 RETURN;
316}
317
dc3c76f8
NC
318/* Helper function for pp_rv2sv and pp_rv2av */
319GV *
fe9845cc
RB
320Perl_softref2xv(pTHX_ SV *const sv, const char *const what,
321 const svtype type, SV ***spp)
dc3c76f8 322{
dc3c76f8
NC
323 GV *gv;
324
7918f24d
NC
325 PERL_ARGS_ASSERT_SOFTREF2XV;
326
dc3c76f8
NC
327 if (PL_op->op_private & HINT_STRICT_REFS) {
328 if (SvOK(sv))
fedf30e1 329 Perl_die(aTHX_ PL_no_symref_sv, sv,
bf3d870f 330 (SvPOKp(sv) && SvCUR(sv)>32 ? "..." : ""), what);
dc3c76f8
NC
331 else
332 Perl_die(aTHX_ PL_no_usym, what);
333 }
334 if (!SvOK(sv)) {
fd1d9b5c 335 if (
c8fe3bdf 336 PL_op->op_flags & OPf_REF
fd1d9b5c 337 )
dc3c76f8
NC
338 Perl_die(aTHX_ PL_no_usym, what);
339 if (ckWARN(WARN_UNINITIALIZED))
340 report_uninit(sv);
341 if (type != SVt_PV && GIMME_V == G_ARRAY) {
342 (*spp)--;
343 return NULL;
344 }
345 **spp = &PL_sv_undef;
346 return NULL;
347 }
348 if ((PL_op->op_flags & OPf_SPECIAL) &&
349 !(PL_op->op_flags & OPf_MOD))
350 {
77cb3b01 351 if (!(gv = gv_fetchsv_nomg(sv, GV_ADDMG, type)))
dc3c76f8
NC
352 {
353 **spp = &PL_sv_undef;
354 return NULL;
355 }
356 }
357 else {
77cb3b01 358 gv = gv_fetchsv_nomg(sv, GV_ADD, type);
dc3c76f8
NC
359 }
360 return gv;
361}
362
79072805
LW
363PP(pp_rv2sv)
364{
20b7effb 365 dSP; dTOPss;
c445ea15 366 GV *gv = NULL;
79072805 367
9026059d 368 SvGETMAGIC(sv);
ed6116ce 369 if (SvROK(sv)) {
93d7320b
DM
370 if (SvAMAGIC(sv)) {
371 sv = amagic_deref_call(sv, to_sv_amg);
93d7320b 372 }
f5284f61 373
ed6116ce 374 sv = SvRV(sv);
69f00f67 375 if (SvTYPE(sv) >= SVt_PVAV)
cea2e8a9 376 DIE(aTHX_ "Not a SCALAR reference");
79072805
LW
377 }
378 else {
159b6efe 379 gv = MUTABLE_GV(sv);
748a9306 380
6e592b3a 381 if (!isGV_with_GP(gv)) {
dc3c76f8
NC
382 gv = Perl_softref2xv(aTHX_ sv, "a SCALAR", SVt_PV, &sp);
383 if (!gv)
384 RETURN;
463ee0b2 385 }
29c711a3 386 sv = GvSVn(gv);
a0d0e21e 387 }
533c011a 388 if (PL_op->op_flags & OPf_MOD) {
82d03984
RGS
389 if (PL_op->op_private & OPpLVAL_INTRO) {
390 if (cUNOP->op_first->op_type == OP_NULL)
159b6efe 391 sv = save_scalar(MUTABLE_GV(TOPs));
82d03984
RGS
392 else if (gv)
393 sv = save_scalar(gv);
394 else
f1f66076 395 Perl_croak(aTHX_ "%s", PL_no_localize_ref);
82d03984 396 }
533c011a 397 else if (PL_op->op_private & OPpDEREF)
9026059d 398 sv = vivify_ref(sv, PL_op->op_private & OPpDEREF);
79072805 399 }
a0d0e21e 400 SETs(sv);
79072805
LW
401 RETURN;
402}
403
404PP(pp_av2arylen)
405{
20b7effb 406 dSP;
502c6561 407 AV * const av = MUTABLE_AV(TOPs);
02d85cc3
EB
408 const I32 lvalue = PL_op->op_flags & OPf_MOD || LVRET;
409 if (lvalue) {
8160c8f5
DM
410 SV ** const svp = Perl_av_arylen_p(aTHX_ MUTABLE_AV(av));
411 if (!*svp) {
412 *svp = newSV_type(SVt_PVMG);
413 sv_magic(*svp, MUTABLE_SV(av), PERL_MAGIC_arylen, NULL, 0);
02d85cc3 414 }
8160c8f5 415 SETs(*svp);
02d85cc3 416 } else {
e1dccc0d 417 SETs(sv_2mortal(newSViv(AvFILL(MUTABLE_AV(av)))));
79072805 418 }
79072805
LW
419 RETURN;
420}
421
a0d0e21e
LW
422PP(pp_pos)
423{
27a8dde8 424 dSP; dTOPss;
8ec5e241 425
78f9721b 426 if (PL_op->op_flags & OPf_MOD || LVRET) {
d14578b8 427 SV * const ret = sv_2mortal(newSV_type(SVt_PVLV));/* Not TARG RT#67838 */
16eb5365
FC
428 sv_magic(ret, NULL, PERL_MAGIC_pos, NULL, 0);
429 LvTYPE(ret) = '.';
430 LvTARG(ret) = SvREFCNT_inc_simple(sv);
27a8dde8 431 SETs(ret); /* no SvSETMAGIC */
a0d0e21e
LW
432 }
433 else {
96c2a8ff 434 const MAGIC * const mg = mg_find_mglob(sv);
6174b39a 435 if (mg && mg->mg_len != -1) {
2154eca7 436 dTARGET;
6174b39a 437 STRLEN i = mg->mg_len;
25fdce4a 438 if (mg->mg_flags & MGf_BYTES && DO_UTF8(sv))
6174b39a 439 i = sv_pos_b2u_flags(sv, i, SV_GMAGIC|SV_CONST_RETURN);
27a8dde8
FC
440 SETu(i);
441 return NORMAL;
a0d0e21e 442 }
27a8dde8 443 SETs(&PL_sv_undef);
a0d0e21e 444 }
27a8dde8 445 return NORMAL;
a0d0e21e
LW
446}
447
79072805
LW
448PP(pp_rv2cv)
449{
20b7effb 450 dSP;
79072805 451 GV *gv;
1eced8f8 452 HV *stash_unused;
c445ea15 453 const I32 flags = (PL_op->op_flags & OPf_SPECIAL)
9da346da 454 ? GV_ADDMG
d14578b8
KW
455 : ((PL_op->op_private & (OPpLVAL_INTRO|OPpMAY_RETURN_CONSTANT))
456 == OPpMAY_RETURN_CONSTANT)
c445ea15
AL
457 ? GV_ADD|GV_NOEXPAND
458 : GV_ADD;
4633a7c4
LW
459 /* We usually try to add a non-existent subroutine in case of AUTOLOAD. */
460 /* (But not in defined().) */
e26df76a 461
1eced8f8 462 CV *cv = sv_2cv(TOPs, &stash_unused, &gv, flags);
5a20ba3d 463 if (cv) NOOP;
e26df76a 464 else if ((flags == (GV_ADD|GV_NOEXPAND)) && gv && SvROK(gv)) {
2eaf799e
FC
465 cv = SvTYPE(SvRV(gv)) == SVt_PVCV
466 ? MUTABLE_CV(SvRV(gv))
467 : MUTABLE_CV(gv);
e26df76a 468 }
07055b4c 469 else
ea726b52 470 cv = MUTABLE_CV(&PL_sv_undef);
ad64d0ec 471 SETs(MUTABLE_SV(cv));
3d79e3ee 472 return NORMAL;
79072805
LW
473}
474
c07a80fd
PP
475PP(pp_prototype)
476{
20b7effb 477 dSP;
c07a80fd
PP
478 CV *cv;
479 HV *stash;
480 GV *gv;
fabdb6c0 481 SV *ret = &PL_sv_undef;
c07a80fd 482
6954f42f 483 if (SvGMAGICAL(TOPs)) SETs(sv_mortalcopy(TOPs));
b6c543e3 484 if (SvPOK(TOPs) && SvCUR(TOPs) >= 7) {
e3f73d4e 485 const char * s = SvPVX_const(TOPs);
b6c543e3 486 if (strnEQ(s, "CORE::", 6)) {
be1b855b 487 const int code = keyword(s + 6, SvCUR(TOPs) - 6, 1);
a96df643 488 if (!code)
b17a0679
FC
489 DIE(aTHX_ "Can't find an opnumber for \"%"UTF8f"\"",
490 UTF8fARG(SvFLAGS(TOPs) & SVf_UTF8, SvCUR(TOPs)-6, s+6));
4e338c21 491 {
b66130dd
FC
492 SV * const sv = core_prototype(NULL, s + 6, code, NULL);
493 if (sv) ret = sv;
494 }
b8c38f0a 495 goto set;
b6c543e3
IZ
496 }
497 }
f2c0649b 498 cv = sv_2cv(TOPs, &stash, &gv, 0);
5f05dabc 499 if (cv && SvPOK(cv))
8fa6a409
FC
500 ret = newSVpvn_flags(
501 CvPROTO(cv), CvPROTOLEN(cv), SVs_TEMP | SvUTF8(cv)
502 );
b6c543e3 503 set:
c07a80fd
PP
504 SETs(ret);
505 RETURN;
506}
507
a0d0e21e
LW
508PP(pp_anoncode)
509{
20b7effb 510 dSP;
ea726b52 511 CV *cv = MUTABLE_CV(PAD_SV(PL_op->op_targ));
a5f75d66 512 if (CvCLONE(cv))
ad64d0ec 513 cv = MUTABLE_CV(sv_2mortal(MUTABLE_SV(cv_clone(cv))));
5f05dabc 514 EXTEND(SP,1);
ad64d0ec 515 PUSHs(MUTABLE_SV(cv));
a0d0e21e
LW
516 RETURN;
517}
518
519PP(pp_srefgen)
79072805 520{
20b7effb 521 dSP;
71be2cbc 522 *SP = refto(*SP);
3ed34c76 523 return NORMAL;
8ec5e241 524}
a0d0e21e
LW
525
526PP(pp_refgen)
527{
20b7effb 528 dSP; dMARK;
82334630 529 if (GIMME_V != G_ARRAY) {
5f0b1d4e
GS
530 if (++MARK <= SP)
531 *MARK = *SP;
532 else
1d51ab6c
FC
533 {
534 MEXTEND(SP, 1);
3280af22 535 *MARK = &PL_sv_undef;
1d51ab6c 536 }
5f0b1d4e
GS
537 *MARK = refto(*MARK);
538 SP = MARK;
539 RETURN;
a0d0e21e 540 }
bbce6d69 541 EXTEND_MORTAL(SP - MARK);
71be2cbc
PP
542 while (++MARK <= SP)
543 *MARK = refto(*MARK);
a0d0e21e 544 RETURN;
79072805
LW
545}
546
76e3520e 547STATIC SV*
cea2e8a9 548S_refto(pTHX_ SV *sv)
71be2cbc
PP
549{
550 SV* rv;
551
7918f24d
NC
552 PERL_ARGS_ASSERT_REFTO;
553
71be2cbc
PP
554 if (SvTYPE(sv) == SVt_PVLV && LvTYPE(sv) == 'y') {
555 if (LvTARGLEN(sv))
68dc0745
PP
556 vivify_defelem(sv);
557 if (!(sv = LvTARG(sv)))
3280af22 558 sv = &PL_sv_undef;
0dd88869 559 else
b37c2d43 560 SvREFCNT_inc_void_NN(sv);
71be2cbc 561 }
d8b46c1b 562 else if (SvTYPE(sv) == SVt_PVAV) {
502c6561
NC
563 if (!AvREAL((const AV *)sv) && AvREIFY((const AV *)sv))
564 av_reify(MUTABLE_AV(sv));
d8b46c1b 565 SvTEMP_off(sv);
b37c2d43 566 SvREFCNT_inc_void_NN(sv);
d8b46c1b 567 }
60779a30 568 else if (SvPADTMP(sv)) {
f2933f5f 569 sv = newSVsv(sv);
60779a30 570 }
71be2cbc
PP
571 else {
572 SvTEMP_off(sv);
b37c2d43 573 SvREFCNT_inc_void_NN(sv);
71be2cbc
PP
574 }
575 rv = sv_newmortal();
4df7f6af 576 sv_upgrade(rv, SVt_IV);
b162af07 577 SvRV_set(rv, sv);
71be2cbc
PP
578 SvROK_on(rv);
579 return rv;
580}
581
79072805
LW
582PP(pp_ref)
583{
3c1e67ac
DD
584 dSP;
585 SV * const sv = TOPs;
f12c7020 586
511ddbdf
FC
587 SvGETMAGIC(sv);
588 if (!SvROK(sv))
3c1e67ac
DD
589 SETs(&PL_sv_no);
590 else {
591 dTARGET;
592 SETs(TARG);
593 /* use the return value that is in a register, its the same as TARG */
594 TARG = sv_ref(TARG,SvRV(sv),TRUE);
595 SvSETMAGIC(TARG);
596 }
79072805 597
3c1e67ac 598 return NORMAL;
79072805
LW
599}
600
601PP(pp_bless)
602{
20b7effb 603 dSP;
463ee0b2 604 HV *stash;
79072805 605
463ee0b2 606 if (MAXARG == 1)
dcdfe746 607 {
c2f922f1 608 curstash:
11faa288 609 stash = CopSTASH(PL_curcop);
dcdfe746
FC
610 if (SvTYPE(stash) != SVt_PVHV)
611 Perl_croak(aTHX_ "Attempt to bless into a freed package");
612 }
7b8d334a 613 else {
1b6737cc 614 SV * const ssv = POPs;
7b8d334a 615 STRLEN len;
e1ec3a88 616 const char *ptr;
81689caa 617
c2f922f1 618 if (!ssv) goto curstash;
8d9dd4b9 619 SvGETMAGIC(ssv);
c7ea825d
FC
620 if (SvROK(ssv)) {
621 if (!SvAMAGIC(ssv)) {
622 frog:
81689caa 623 Perl_croak(aTHX_ "Attempt to bless into a reference");
c7ea825d
FC
624 }
625 /* SvAMAGIC is on here, but it only means potentially overloaded,
626 so after stringification: */
627 ptr = SvPV_nomg_const(ssv,len);
628 /* We need to check the flag again: */
629 if (!SvAMAGIC(ssv)) goto frog;
630 }
631 else ptr = SvPV_nomg_const(ssv,len);
a2a5de95
NC
632 if (len == 0)
633 Perl_ck_warner(aTHX_ packWARN(WARN_MISC),
634 "Explicit blessing to '' (assuming package main)");
e69c50fe 635 stash = gv_stashpvn(ptr, len, GV_ADD|SvUTF8(ssv));
7b8d334a 636 }
a0d0e21e 637
5d3fdfeb 638 (void)sv_bless(TOPs, stash);
79072805
LW
639 RETURN;
640}
641
fb73857a
PP
642PP(pp_gelem)
643{
20b7effb 644 dSP;
b13b2135 645
1b6737cc 646 SV *sv = POPs;
a180b31a
BF
647 STRLEN len;
648 const char * const elem = SvPV_const(sv, len);
5695161e 649 GV * const gv = MUTABLE_GV(TOPs);
c445ea15 650 SV * tmpRef = NULL;
1b6737cc 651
c445ea15 652 sv = NULL;
c4ba80c3
NC
653 if (elem) {
654 /* elem will always be NUL terminated. */
1b6737cc 655 const char * const second_letter = elem + 1;
c4ba80c3
NC
656 switch (*elem) {
657 case 'A':
a180b31a 658 if (len == 5 && strEQ(second_letter, "RRAY"))
e14698d8 659 {
ad64d0ec 660 tmpRef = MUTABLE_SV(GvAV(gv));
e14698d8
FC
661 if (tmpRef && !AvREAL((const AV *)tmpRef)
662 && AvREIFY((const AV *)tmpRef))
663 av_reify(MUTABLE_AV(tmpRef));
664 }
c4ba80c3
NC
665 break;
666 case 'C':
a180b31a 667 if (len == 4 && strEQ(second_letter, "ODE"))
ad64d0ec 668 tmpRef = MUTABLE_SV(GvCVu(gv));
c4ba80c3
NC
669 break;
670 case 'F':
a180b31a 671 if (len == 10 && strEQ(second_letter, "ILEHANDLE")) {
c4ba80c3
NC
672 /* finally deprecated in 5.8.0 */
673 deprecate("*glob{FILEHANDLE}");
ad64d0ec 674 tmpRef = MUTABLE_SV(GvIOp(gv));
c4ba80c3
NC
675 }
676 else
a180b31a 677 if (len == 6 && strEQ(second_letter, "ORMAT"))
ad64d0ec 678 tmpRef = MUTABLE_SV(GvFORM(gv));
c4ba80c3
NC
679 break;
680 case 'G':
a180b31a 681 if (len == 4 && strEQ(second_letter, "LOB"))
ad64d0ec 682 tmpRef = MUTABLE_SV(gv);
c4ba80c3
NC
683 break;
684 case 'H':
a180b31a 685 if (len == 4 && strEQ(second_letter, "ASH"))
ad64d0ec 686 tmpRef = MUTABLE_SV(GvHV(gv));
c4ba80c3
NC
687 break;
688 case 'I':
a180b31a 689 if (*second_letter == 'O' && !elem[2] && len == 2)
ad64d0ec 690 tmpRef = MUTABLE_SV(GvIOp(gv));
c4ba80c3
NC
691 break;
692 case 'N':
a180b31a 693 if (len == 4 && strEQ(second_letter, "AME"))
a663657d 694 sv = newSVhek(GvNAME_HEK(gv));
c4ba80c3
NC
695 break;
696 case 'P':
a180b31a 697 if (len == 7 && strEQ(second_letter, "ACKAGE")) {
7fa3a4ab
NC
698 const HV * const stash = GvSTASH(gv);
699 const HEK * const hek = stash ? HvNAME_HEK(stash) : NULL;
396482e1 700 sv = hek ? newSVhek(hek) : newSVpvs("__ANON__");
c4ba80c3
NC
701 }
702 break;
703 case 'S':
a180b31a 704 if (len == 6 && strEQ(second_letter, "CALAR"))
f9d52e31 705 tmpRef = GvSVn(gv);
c4ba80c3 706 break;
39b99f21 707 }
fb73857a 708 }
76e3520e
GS
709 if (tmpRef)
710 sv = newRV(tmpRef);
fb73857a
PP
711 if (sv)
712 sv_2mortal(sv);
713 else
3280af22 714 sv = &PL_sv_undef;
5695161e 715 SETs(sv);
fb73857a
PP
716 RETURN;
717}
718
a0d0e21e 719/* Pattern matching */
79072805 720
a0d0e21e 721PP(pp_study)
79072805 722{
add3e777 723 dSP; dTOPss;
a0d0e21e
LW
724 STRLEN len;
725
1fa930f2 726 (void)SvPV(sv, len);
bc9a5256 727 if (len == 0 || len > I32_MAX || !SvPOK(sv) || SvUTF8(sv) || SvVALID(sv)) {
32f0ea87 728 /* Historically, study was skipped in these cases. */
add3e777
FC
729 SETs(&PL_sv_no);
730 return NORMAL;
a4f4e906
NC
731 }
732
a58a85fa 733 /* Make study a no-op. It's no longer useful and its existence
32f0ea87 734 complicates matters elsewhere. */
add3e777
FC
735 SETs(&PL_sv_yes);
736 return NORMAL;
79072805
LW
737}
738
b1c05ba5
DM
739
740/* also used for: pp_transr() */
741
a0d0e21e 742PP(pp_trans)
79072805 743{
6442877a 744 dSP;
a0d0e21e
LW
745 SV *sv;
746
533c011a 747 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 748 sv = POPs;
79072805 749 else {
a0d0e21e 750 EXTEND(SP,1);
f605e527 751 if (ARGTARG)
6442877a 752 sv = PAD_SV(ARGTARG);
f605e527
FC
753 else {
754 sv = DEFSV;
755 }
79072805 756 }
bb16bae8 757 if(PL_op->op_type == OP_TRANSR) {
290797f7
FC
758 STRLEN len;
759 const char * const pv = SvPV(sv,len);
760 SV * const newsv = newSVpvn_flags(pv, len, SVs_TEMP|SvUTF8(sv));
bb16bae8 761 do_trans(newsv);
290797f7 762 PUSHs(newsv);
bb16bae8 763 }
5bbe7184 764 else {
6442877a 765 mPUSHi(do_trans(sv));
5bbe7184 766 }
a0d0e21e 767 RETURN;
79072805
LW
768}
769
a0d0e21e 770/* Lvalue operators. */
79072805 771
f595e19f 772static size_t
81745e4e
NC
773S_do_chomp(pTHX_ SV *retval, SV *sv, bool chomping)
774{
81745e4e
NC
775 STRLEN len;
776 char *s;
f595e19f 777 size_t count = 0;
81745e4e
NC
778
779 PERL_ARGS_ASSERT_DO_CHOMP;
780
781 if (chomping && (RsSNARF(PL_rs) || RsRECORD(PL_rs)))
f595e19f 782 return 0;
81745e4e
NC
783 if (SvTYPE(sv) == SVt_PVAV) {
784 I32 i;
785 AV *const av = MUTABLE_AV(sv);
786 const I32 max = AvFILL(av);
787
788 for (i = 0; i <= max; i++) {
789 sv = MUTABLE_SV(av_fetch(av, i, FALSE));
790 if (sv && ((sv = *(SV**)sv), sv != &PL_sv_undef))
f595e19f 791 count += do_chomp(retval, sv, chomping);
81745e4e 792 }
f595e19f 793 return count;
81745e4e
NC
794 }
795 else if (SvTYPE(sv) == SVt_PVHV) {
796 HV* const hv = MUTABLE_HV(sv);
797 HE* entry;
798 (void)hv_iterinit(hv);
799 while ((entry = hv_iternext(hv)))
f595e19f
FC
800 count += do_chomp(retval, hv_iterval(hv,entry), chomping);
801 return count;
81745e4e
NC
802 }
803 else if (SvREADONLY(sv)) {
cb077ed2 804 Perl_croak_no_modify();
81745e4e
NC
805 }
806
47e13f24 807 if (IN_ENCODING) {
81745e4e
NC
808 if (!SvUTF8(sv)) {
809 /* XXX, here sv is utf8-ized as a side-effect!
810 If encoding.pm is used properly, almost string-generating
811 operations, including literal strings, chr(), input data, etc.
812 should have been utf8-ized already, right?
813 */
ad2de1b2 814 sv_recode_to_utf8(sv, _get_encoding());
81745e4e
NC
815 }
816 }
817
818 s = SvPV(sv, len);
819 if (chomping) {
820 char *temp_buffer = NULL;
821 SV *svrecode = NULL;
822
823 if (s && len) {
824 s += --len;
825 if (RsPARA(PL_rs)) {
826 if (*s != '\n')
827 goto nope;
f595e19f 828 ++count;
81745e4e
NC
829 while (len && s[-1] == '\n') {
830 --len;
831 --s;
f595e19f 832 ++count;
81745e4e
NC
833 }
834 }
835 else {
836 STRLEN rslen, rs_charlen;
837 const char *rsptr = SvPV_const(PL_rs, rslen);
838
839 rs_charlen = SvUTF8(PL_rs)
840 ? sv_len_utf8(PL_rs)
841 : rslen;
842
843 if (SvUTF8(PL_rs) != SvUTF8(sv)) {
844 /* Assumption is that rs is shorter than the scalar. */
845 if (SvUTF8(PL_rs)) {
846 /* RS is utf8, scalar is 8 bit. */
847 bool is_utf8 = TRUE;
848 temp_buffer = (char*)bytes_from_utf8((U8*)rsptr,
849 &rslen, &is_utf8);
850 if (is_utf8) {
851 /* Cannot downgrade, therefore cannot possibly match
852 */
853 assert (temp_buffer == rsptr);
854 temp_buffer = NULL;
855 goto nope;
856 }
857 rsptr = temp_buffer;
858 }
47e13f24 859 else if (IN_ENCODING) {
81745e4e
NC
860 /* RS is 8 bit, encoding.pm is used.
861 * Do not recode PL_rs as a side-effect. */
862 svrecode = newSVpvn(rsptr, rslen);
ad2de1b2 863 sv_recode_to_utf8(svrecode, _get_encoding());
81745e4e
NC
864 rsptr = SvPV_const(svrecode, rslen);
865 rs_charlen = sv_len_utf8(svrecode);
866 }
867 else {
868 /* RS is 8 bit, scalar is utf8. */
869 temp_buffer = (char*)bytes_to_utf8((U8*)rsptr, &rslen);
870 rsptr = temp_buffer;
871 }
872 }
873 if (rslen == 1) {
874 if (*s != *rsptr)
875 goto nope;
f595e19f 876 ++count;
81745e4e
NC
877 }
878 else {
879 if (len < rslen - 1)
880 goto nope;
881 len -= rslen - 1;
882 s -= rslen - 1;
883 if (memNE(s, rsptr, rslen))
884 goto nope;
f595e19f 885 count += rs_charlen;
81745e4e
NC
886 }
887 }
3b7ded39 888 SvPV_force_nomg_nolen(sv);
81745e4e
NC
889 SvCUR_set(sv, len);
890 *SvEND(sv) = '\0';
891 SvNIOK_off(sv);
892 SvSETMAGIC(sv);
893 }
894 nope:
895
896 SvREFCNT_dec(svrecode);
897
898 Safefree(temp_buffer);
899 } else {
f8c80a8e 900 if (len && (!SvPOK(sv) || SvIsCOW(sv)))
81745e4e
NC
901 s = SvPV_force_nomg(sv, len);
902 if (DO_UTF8(sv)) {
903 if (s && len) {
904 char * const send = s + len;
905 char * const start = s;
906 s = send - 1;
907 while (s > start && UTF8_IS_CONTINUATION(*s))
908 s--;
909 if (is_utf8_string((U8*)s, send - s)) {
910 sv_setpvn(retval, s, send - s);
911 *s = '\0';
912 SvCUR_set(sv, s - start);
913 SvNIOK_off(sv);
914 SvUTF8_on(retval);
915 }
916 }
917 else
918 sv_setpvs(retval, "");
919 }
920 else if (s && len) {
921 s += --len;
922 sv_setpvn(retval, s, 1);
923 *s = '\0';
924 SvCUR_set(sv, len);
925 SvUTF8_off(sv);
926 SvNIOK_off(sv);
927 }
928 else
929 sv_setpvs(retval, "");
930 SvSETMAGIC(sv);
931 }
f595e19f 932 return count;
81745e4e
NC
933}
934
b1c05ba5
DM
935
936/* also used for: pp_schomp() */
937
a0d0e21e
LW
938PP(pp_schop)
939{
20b7effb 940 dSP; dTARGET;
fa54efae
NC
941 const bool chomping = PL_op->op_type == OP_SCHOMP;
942
f595e19f 943 const size_t count = do_chomp(TARG, TOPs, chomping);
fa54efae 944 if (chomping)
f595e19f 945 sv_setiv(TARG, count);
a0d0e21e 946 SETTARG;
ee41d8c7 947 return NORMAL;
79072805
LW
948}
949
b1c05ba5
DM
950
951/* also used for: pp_chomp() */
952
a0d0e21e 953PP(pp_chop)
79072805 954{
20b7effb 955 dSP; dMARK; dTARGET; dORIGMARK;
fa54efae 956 const bool chomping = PL_op->op_type == OP_CHOMP;
f595e19f 957 size_t count = 0;
8ec5e241 958
20cf1f79 959 while (MARK < SP)
f595e19f
FC
960 count += do_chomp(TARG, *++MARK, chomping);
961 if (chomping)
962 sv_setiv(TARG, count);
20cf1f79
NC
963 SP = ORIGMARK;
964 XPUSHTARG;
a0d0e21e 965 RETURN;
79072805
LW
966}
967
a0d0e21e
LW
968PP(pp_undef)
969{
20b7effb 970 dSP;
a0d0e21e
LW
971 SV *sv;
972
533c011a 973 if (!PL_op->op_private) {
774d564b 974 EXTEND(SP, 1);
a0d0e21e 975 RETPUSHUNDEF;
774d564b 976 }
79072805 977
821f14b0 978 sv = TOPs;
a0d0e21e 979 if (!sv)
821f14b0
FC
980 {
981 SETs(&PL_sv_undef);
982 return NORMAL;
983 }
85e6fe83 984
4dda930b
FC
985 if (SvTHINKFIRST(sv))
986 sv_force_normal_flags(sv, SV_COW_DROP_PV|SV_IMMEDIATE_UNREF);
85e6fe83 987
a0d0e21e
LW
988 switch (SvTYPE(sv)) {
989 case SVt_NULL:
990 break;
991 case SVt_PVAV:
60edcf09 992 av_undef(MUTABLE_AV(sv));
a0d0e21e
LW
993 break;
994 case SVt_PVHV:
60edcf09 995 hv_undef(MUTABLE_HV(sv));
a0d0e21e
LW
996 break;
997 case SVt_PVCV:
a2a5de95 998 if (cv_const_sv((const CV *)sv))
714cd18f
BF
999 Perl_ck_warner(aTHX_ packWARN(WARN_MISC),
1000 "Constant subroutine %"SVf" undefined",
1001 SVfARG(CvANON((const CV *)sv)
1002 ? newSVpvs_flags("(anonymous)", SVs_TEMP)
bdbfc51a
FC
1003 : sv_2mortal(newSVhek(
1004 CvNAMED(sv)
1005 ? CvNAME_HEK((CV *)sv)
1006 : GvENAME_HEK(CvGV((const CV *)sv))
1007 ))
1008 ));
5f66b61c 1009 /* FALLTHROUGH */
9607fc9c 1010 case SVt_PVFM:
6fc92669 1011 /* let user-undef'd sub keep its identity */
b7acb0a3 1012 cv_undef_flags(MUTABLE_CV(sv), CV_UNDEF_KEEP_NAME);
a0d0e21e 1013 break;
8e07c86e 1014 case SVt_PVGV:
bc1df6c2
FC
1015 assert(isGV_with_GP(sv));
1016 assert(!SvFAKE(sv));
1017 {
20408e3c 1018 GP *gp;
dd69841b
BB
1019 HV *stash;
1020
dd69841b 1021 /* undef *Pkg::meth_name ... */
e530fb81
FC
1022 bool method_changed
1023 = GvCVu((const GV *)sv) && (stash = GvSTASH((const GV *)sv))
1024 && HvENAME_get(stash);
1025 /* undef *Foo:: */
1026 if((stash = GvHV((const GV *)sv))) {
1027 if(HvENAME_get(stash))
1028 SvREFCNT_inc_simple_void_NN(sv_2mortal((SV *)stash));
1029 else stash = NULL;
1030 }
dd69841b 1031
795eb8c8 1032 SvREFCNT_inc_simple_void_NN(sv_2mortal(sv));
159b6efe 1033 gp_free(MUTABLE_GV(sv));
a02a5408 1034 Newxz(gp, 1, GP);
c43ae56f 1035 GvGP_set(sv, gp_ref(gp));
2e3295e3 1036#ifndef PERL_DONT_CREATE_GVSV
561b68a9 1037 GvSV(sv) = newSV(0);
2e3295e3 1038#endif
57843af0 1039 GvLINE(sv) = CopLINE(PL_curcop);
159b6efe 1040 GvEGV(sv) = MUTABLE_GV(sv);
20408e3c 1041 GvMULTI_on(sv);
e530fb81
FC
1042
1043 if(stash)
afdbe55d 1044 mro_package_moved(NULL, stash, (const GV *)sv, 0);
e530fb81
FC
1045 stash = NULL;
1046 /* undef *Foo::ISA */
1047 if( strEQ(GvNAME((const GV *)sv), "ISA")
1048 && (stash = GvSTASH((const GV *)sv))
1049 && (method_changed || HvENAME(stash)) )
1050 mro_isa_changed_in(stash);
1051 else if(method_changed)
1052 mro_method_changed_in(
da9043f5 1053 GvSTASH((const GV *)sv)
e530fb81
FC
1054 );
1055
6e592b3a 1056 break;
20408e3c 1057 }
a0d0e21e 1058 default:
b15aece3 1059 if (SvTYPE(sv) >= SVt_PV && SvPVX_const(sv) && SvLEN(sv)) {
8bd4d4c5 1060 SvPV_free(sv);
c445ea15 1061 SvPV_set(sv, NULL);
4633a7c4 1062 SvLEN_set(sv, 0);
a0d0e21e 1063 }
0c34ef67 1064 SvOK_off(sv);
4633a7c4 1065 SvSETMAGIC(sv);
79072805 1066 }
a0d0e21e 1067
821f14b0
FC
1068 SETs(&PL_sv_undef);
1069 return NORMAL;
79072805
LW
1070}
1071
b1c05ba5
DM
1072
1073/* also used for: pp_i_postdec() pp_i_postinc() pp_postdec() */
1074
a0d0e21e
LW
1075PP(pp_postinc)
1076{
20b7effb 1077 dSP; dTARGET;
c22c99bc
FC
1078 const bool inc =
1079 PL_op->op_type == OP_POSTINC || PL_op->op_type == OP_I_POSTINC;
60092ce4 1080 if (SvTYPE(TOPs) >= SVt_PVAV || (isGV_with_GP(TOPs) && !SvFAKE(TOPs)))
cb077ed2 1081 Perl_croak_no_modify();
3baa0581 1082 if (SvROK(TOPs))
7dcb9b98 1083 TARG = sv_newmortal();
a0d0e21e 1084 sv_setsv(TARG, TOPs);
4bac9ae4 1085 if (!SvREADONLY(TOPs) && !SvGMAGICAL(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs)
c22c99bc 1086 && SvIVX(TOPs) != (inc ? IV_MAX : IV_MIN))
55497cff 1087 {
c22c99bc 1088 SvIV_set(TOPs, SvIVX(TOPs) + (inc ? 1 : -1));
55497cff 1089 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
748a9306 1090 }
c22c99bc 1091 else if (inc)
6f1401dc 1092 sv_inc_nomg(TOPs);
c22c99bc 1093 else sv_dec_nomg(TOPs);
a0d0e21e 1094 SvSETMAGIC(TOPs);
1e54a23f 1095 /* special case for undef: see thread at 2003-03/msg00536.html in archive */
c22c99bc 1096 if (inc && !SvOK(TARG))
a0d0e21e 1097 sv_setiv(TARG, 0);
e87de4ab 1098 SETTARG;
a0d0e21e
LW
1099 return NORMAL;
1100}
79072805 1101
a0d0e21e
LW
1102/* Ordinary operators. */
1103
1104PP(pp_pow)
1105{
20b7effb 1106 dSP; dATARGET; SV *svl, *svr;
58d76dfd 1107#ifdef PERL_PRESERVE_IVUV
52a96ae6
HS
1108 bool is_int = 0;
1109#endif
6f1401dc
DM
1110 tryAMAGICbin_MG(pow_amg, AMGf_assign|AMGf_numeric);
1111 svr = TOPs;
1112 svl = TOPm1s;
52a96ae6
HS
1113#ifdef PERL_PRESERVE_IVUV
1114 /* For integer to integer power, we do the calculation by hand wherever
1115 we're sure it is safe; otherwise we call pow() and try to convert to
1116 integer afterwards. */
01f91bf2 1117 if (SvIV_please_nomg(svr) && SvIV_please_nomg(svl)) {
900658e3
PF
1118 UV power;
1119 bool baseuok;
1120 UV baseuv;
1121
800401ee
JH
1122 if (SvUOK(svr)) {
1123 power = SvUVX(svr);
900658e3 1124 } else {
800401ee 1125 const IV iv = SvIVX(svr);
900658e3
PF
1126 if (iv >= 0) {
1127 power = iv;
1128 } else {
1129 goto float_it; /* Can't do negative powers this way. */
1130 }
1131 }
1132
800401ee 1133 baseuok = SvUOK(svl);
900658e3 1134 if (baseuok) {
800401ee 1135 baseuv = SvUVX(svl);
900658e3 1136 } else {
800401ee 1137 const IV iv = SvIVX(svl);
900658e3
PF
1138 if (iv >= 0) {
1139 baseuv = iv;
1140 baseuok = TRUE; /* effectively it's a UV now */
1141 } else {
1142 baseuv = -iv; /* abs, baseuok == false records sign */
1143 }
1144 }
52a96ae6
HS
1145 /* now we have integer ** positive integer. */
1146 is_int = 1;
1147
1148 /* foo & (foo - 1) is zero only for a power of 2. */
58d76dfd 1149 if (!(baseuv & (baseuv - 1))) {
52a96ae6 1150 /* We are raising power-of-2 to a positive integer.
58d76dfd
JH
1151 The logic here will work for any base (even non-integer
1152 bases) but it can be less accurate than
1153 pow (base,power) or exp (power * log (base)) when the
1154 intermediate values start to spill out of the mantissa.
1155 With powers of 2 we know this can't happen.
1156 And powers of 2 are the favourite thing for perl
1157 programmers to notice ** not doing what they mean. */
1158 NV result = 1.0;
1159 NV base = baseuok ? baseuv : -(NV)baseuv;
900658e3
PF
1160
1161 if (power & 1) {
1162 result *= base;
1163 }
1164 while (power >>= 1) {
1165 base *= base;
1166 if (power & 1) {
1167 result *= base;
1168 }
1169 }
58d76dfd
JH
1170 SP--;
1171 SETn( result );
6f1401dc 1172 SvIV_please_nomg(svr);
58d76dfd 1173 RETURN;
52a96ae6 1174 } else {
eb578fdb
KW
1175 unsigned int highbit = 8 * sizeof(UV);
1176 unsigned int diff = 8 * sizeof(UV);
900658e3
PF
1177 while (diff >>= 1) {
1178 highbit -= diff;
1179 if (baseuv >> highbit) {
1180 highbit += diff;
1181 }
52a96ae6
HS
1182 }
1183 /* we now have baseuv < 2 ** highbit */
1184 if (power * highbit <= 8 * sizeof(UV)) {
1185 /* result will definitely fit in UV, so use UV math
1186 on same algorithm as above */
eb578fdb
KW
1187 UV result = 1;
1188 UV base = baseuv;
f2338a2e 1189 const bool odd_power = cBOOL(power & 1);
900658e3
PF
1190 if (odd_power) {
1191 result *= base;
1192 }
1193 while (power >>= 1) {
1194 base *= base;
1195 if (power & 1) {
52a96ae6 1196 result *= base;
52a96ae6
HS
1197 }
1198 }
1199 SP--;
0615a994 1200 if (baseuok || !odd_power)
52a96ae6
HS
1201 /* answer is positive */
1202 SETu( result );
1203 else if (result <= (UV)IV_MAX)
1204 /* answer negative, fits in IV */
1205 SETi( -(IV)result );
1206 else if (result == (UV)IV_MIN)
1207 /* 2's complement assumption: special case IV_MIN */
1208 SETi( IV_MIN );
1209 else
1210 /* answer negative, doesn't fit */
1211 SETn( -(NV)result );
1212 RETURN;
1213 }
1214 }
58d76dfd 1215 }
52a96ae6 1216 float_it:
58d76dfd 1217#endif
a0d0e21e 1218 {
6f1401dc
DM
1219 NV right = SvNV_nomg(svr);
1220 NV left = SvNV_nomg(svl);
4efa5a16 1221 (void)POPs;
3aaeb624
JA
1222
1223#if defined(USE_LONG_DOUBLE) && defined(HAS_AIX_POWL_NEG_BASE_BUG)
1224 /*
1225 We are building perl with long double support and are on an AIX OS
1226 afflicted with a powl() function that wrongly returns NaNQ for any
1227 negative base. This was reported to IBM as PMR #23047-379 on
1228 03/06/2006. The problem exists in at least the following versions
1229 of AIX and the libm fileset, and no doubt others as well:
1230
1231 AIX 4.3.3-ML10 bos.adt.libm 4.3.3.50
1232 AIX 5.1.0-ML04 bos.adt.libm 5.1.0.29
1233 AIX 5.2.0 bos.adt.libm 5.2.0.85
1234
1235 So, until IBM fixes powl(), we provide the following workaround to
1236 handle the problem ourselves. Our logic is as follows: for
1237 negative bases (left), we use fmod(right, 2) to check if the
1238 exponent is an odd or even integer:
1239
1240 - if odd, powl(left, right) == -powl(-left, right)
1241 - if even, powl(left, right) == powl(-left, right)
1242
1243 If the exponent is not an integer, the result is rightly NaNQ, so
1244 we just return that (as NV_NAN).
1245 */
1246
1247 if (left < 0.0) {
1248 NV mod2 = Perl_fmod( right, 2.0 );
1249 if (mod2 == 1.0 || mod2 == -1.0) { /* odd integer */
1250 SETn( -Perl_pow( -left, right) );
1251 } else if (mod2 == 0.0) { /* even integer */
1252 SETn( Perl_pow( -left, right) );
1253 } else { /* fractional power */
1254 SETn( NV_NAN );
1255 }
1256 } else {
1257 SETn( Perl_pow( left, right) );
1258 }
1259#else
52a96ae6 1260 SETn( Perl_pow( left, right) );
3aaeb624
JA
1261#endif /* HAS_AIX_POWL_NEG_BASE_BUG */
1262
52a96ae6
HS
1263#ifdef PERL_PRESERVE_IVUV
1264 if (is_int)
6f1401dc 1265 SvIV_please_nomg(svr);
52a96ae6
HS
1266#endif
1267 RETURN;
93a17b20 1268 }
a0d0e21e
LW
1269}
1270
1271PP(pp_multiply)
1272{
20b7effb 1273 dSP; dATARGET; SV *svl, *svr;
6f1401dc
DM
1274 tryAMAGICbin_MG(mult_amg, AMGf_assign|AMGf_numeric);
1275 svr = TOPs;
1276 svl = TOPm1s;
28e5dec8 1277#ifdef PERL_PRESERVE_IVUV
01f91bf2 1278 if (SvIV_please_nomg(svr)) {
28e5dec8
JH
1279 /* Unless the left argument is integer in range we are going to have to
1280 use NV maths. Hence only attempt to coerce the right argument if
1281 we know the left is integer. */
1282 /* Left operand is defined, so is it IV? */
01f91bf2 1283 if (SvIV_please_nomg(svl)) {
800401ee
JH
1284 bool auvok = SvUOK(svl);
1285 bool buvok = SvUOK(svr);
28e5dec8
JH
1286 const UV topmask = (~ (UV)0) << (4 * sizeof (UV));
1287 const UV botmask = ~((~ (UV)0) << (4 * sizeof (UV)));
1288 UV alow;
1289 UV ahigh;
1290 UV blow;
1291 UV bhigh;
1292
1293 if (auvok) {
800401ee 1294 alow = SvUVX(svl);
28e5dec8 1295 } else {
800401ee 1296 const IV aiv = SvIVX(svl);
28e5dec8
JH
1297 if (aiv >= 0) {
1298 alow = aiv;
1299 auvok = TRUE; /* effectively it's a UV now */
1300 } else {
53e2bfb7
DM
1301 /* abs, auvok == false records sign */
1302 alow = (aiv == IV_MIN) ? (UV)aiv : (UV)(-aiv);
28e5dec8
JH
1303 }
1304 }
1305 if (buvok) {
800401ee 1306 blow = SvUVX(svr);
28e5dec8 1307 } else {
800401ee 1308 const IV biv = SvIVX(svr);
28e5dec8
JH
1309 if (biv >= 0) {
1310 blow = biv;
1311 buvok = TRUE; /* effectively it's a UV now */
1312 } else {
53e2bfb7
DM
1313 /* abs, buvok == false records sign */
1314 blow = (biv == IV_MIN) ? (UV)biv : (UV)(-biv);
28e5dec8
JH
1315 }
1316 }
1317
1318 /* If this does sign extension on unsigned it's time for plan B */
1319 ahigh = alow >> (4 * sizeof (UV));
1320 alow &= botmask;
1321 bhigh = blow >> (4 * sizeof (UV));
1322 blow &= botmask;
1323 if (ahigh && bhigh) {
6f207bd3 1324 NOOP;
28e5dec8
JH
1325 /* eg 32 bit is at least 0x10000 * 0x10000 == 0x100000000
1326 which is overflow. Drop to NVs below. */
1327 } else if (!ahigh && !bhigh) {
1328 /* eg 32 bit is at most 0xFFFF * 0xFFFF == 0xFFFE0001
1329 so the unsigned multiply cannot overflow. */
c445ea15 1330 const UV product = alow * blow;
28e5dec8
JH
1331 if (auvok == buvok) {
1332 /* -ve * -ve or +ve * +ve gives a +ve result. */
1333 SP--;
1334 SETu( product );
1335 RETURN;
1336 } else if (product <= (UV)IV_MIN) {
1337 /* 2s complement assumption that (UV)-IV_MIN is correct. */
1338 /* -ve result, which could overflow an IV */
1339 SP--;
02b08bbc
DM
1340 /* can't negate IV_MIN, but there are aren't two
1341 * integers such that !ahigh && !bhigh, where the
1342 * product equals 0x800....000 */
1343 assert(product != (UV)IV_MIN);
25716404 1344 SETi( -(IV)product );
28e5dec8
JH
1345 RETURN;
1346 } /* else drop to NVs below. */
1347 } else {
1348 /* One operand is large, 1 small */
1349 UV product_middle;
1350 if (bhigh) {
1351 /* swap the operands */
1352 ahigh = bhigh;
1353 bhigh = blow; /* bhigh now the temp var for the swap */
1354 blow = alow;
1355 alow = bhigh;
1356 }
1357 /* now, ((ahigh * blow) << half_UV_len) + (alow * blow)
1358 multiplies can't overflow. shift can, add can, -ve can. */
1359 product_middle = ahigh * blow;
1360 if (!(product_middle & topmask)) {
1361 /* OK, (ahigh * blow) won't lose bits when we shift it. */
1362 UV product_low;
1363 product_middle <<= (4 * sizeof (UV));
1364 product_low = alow * blow;
1365
1366 /* as for pp_add, UV + something mustn't get smaller.
1367 IIRC ANSI mandates this wrapping *behaviour* for
1368 unsigned whatever the actual representation*/
1369 product_low += product_middle;
1370 if (product_low >= product_middle) {
1371 /* didn't overflow */
1372 if (auvok == buvok) {
1373 /* -ve * -ve or +ve * +ve gives a +ve result. */
1374 SP--;
1375 SETu( product_low );
1376 RETURN;
1377 } else if (product_low <= (UV)IV_MIN) {
1378 /* 2s complement assumption again */
1379 /* -ve result, which could overflow an IV */
1380 SP--;
53e2bfb7
DM
1381 SETi(product_low == (UV)IV_MIN
1382 ? IV_MIN : -(IV)product_low);
28e5dec8
JH
1383 RETURN;
1384 } /* else drop to NVs below. */
1385 }
1386 } /* product_middle too large */
1387 } /* ahigh && bhigh */
800401ee
JH
1388 } /* SvIOK(svl) */
1389 } /* SvIOK(svr) */
28e5dec8 1390#endif
a0d0e21e 1391 {
6f1401dc
DM
1392 NV right = SvNV_nomg(svr);
1393 NV left = SvNV_nomg(svl);
4efa5a16 1394 (void)POPs;
a0d0e21e
LW
1395 SETn( left * right );
1396 RETURN;
79072805 1397 }
a0d0e21e
LW
1398}
1399
1400PP(pp_divide)
1401{
20b7effb 1402 dSP; dATARGET; SV *svl, *svr;
6f1401dc
DM
1403 tryAMAGICbin_MG(div_amg, AMGf_assign|AMGf_numeric);
1404 svr = TOPs;
1405 svl = TOPm1s;
5479d192 1406 /* Only try to do UV divide first
68795e93 1407 if ((SLOPPYDIVIDE is true) or
5479d192
NC
1408 (PERL_PRESERVE_IVUV is true and one or both SV is a UV too large
1409 to preserve))
1410 The assumption is that it is better to use floating point divide
1411 whenever possible, only doing integer divide first if we can't be sure.
1412 If NV_PRESERVES_UV is true then we know at compile time that no UV
1413 can be too large to preserve, so don't need to compile the code to
1414 test the size of UVs. */
1415
a0d0e21e 1416#ifdef SLOPPYDIVIDE
5479d192
NC
1417# define PERL_TRY_UV_DIVIDE
1418 /* ensure that 20./5. == 4. */
a0d0e21e 1419#else
5479d192
NC
1420# ifdef PERL_PRESERVE_IVUV
1421# ifndef NV_PRESERVES_UV
1422# define PERL_TRY_UV_DIVIDE
1423# endif
1424# endif
a0d0e21e 1425#endif
5479d192
NC
1426
1427#ifdef PERL_TRY_UV_DIVIDE
01f91bf2 1428 if (SvIV_please_nomg(svr) && SvIV_please_nomg(svl)) {
800401ee
JH
1429 bool left_non_neg = SvUOK(svl);
1430 bool right_non_neg = SvUOK(svr);
5479d192
NC
1431 UV left;
1432 UV right;
1433
1434 if (right_non_neg) {
800401ee 1435 right = SvUVX(svr);
5479d192
NC
1436 }
1437 else {
800401ee 1438 const IV biv = SvIVX(svr);
5479d192
NC
1439 if (biv >= 0) {
1440 right = biv;
1441 right_non_neg = TRUE; /* effectively it's a UV now */
1442 }
1443 else {
02b08bbc 1444 right = (biv == IV_MIN) ? (UV)biv : (UV)(-biv);
5479d192
NC
1445 }
1446 }
1447 /* historically undef()/0 gives a "Use of uninitialized value"
1448 warning before dieing, hence this test goes here.
1449 If it were immediately before the second SvIV_please, then
1450 DIE() would be invoked before left was even inspected, so
486ec47a 1451 no inspection would give no warning. */
5479d192
NC
1452 if (right == 0)
1453 DIE(aTHX_ "Illegal division by zero");
1454
1455 if (left_non_neg) {
800401ee 1456 left = SvUVX(svl);
5479d192
NC
1457 }
1458 else {
800401ee 1459 const IV aiv = SvIVX(svl);
5479d192
NC
1460 if (aiv >= 0) {
1461 left = aiv;
1462 left_non_neg = TRUE; /* effectively it's a UV now */
1463 }
1464 else {
02b08bbc 1465 left = (aiv == IV_MIN) ? (UV)aiv : (UV)(-aiv);
5479d192
NC
1466 }
1467 }
1468
1469 if (left >= right
1470#ifdef SLOPPYDIVIDE
1471 /* For sloppy divide we always attempt integer division. */
1472#else
1473 /* Otherwise we only attempt it if either or both operands
1474 would not be preserved by an NV. If both fit in NVs
0c2ee62a
NC
1475 we fall through to the NV divide code below. However,
1476 as left >= right to ensure integer result here, we know that
1477 we can skip the test on the right operand - right big
1478 enough not to be preserved can't get here unless left is
1479 also too big. */
1480
1481 && (left > ((UV)1 << NV_PRESERVES_UV_BITS))
5479d192
NC
1482#endif
1483 ) {
1484 /* Integer division can't overflow, but it can be imprecise. */
1b6737cc 1485 const UV result = left / right;
5479d192
NC
1486 if (result * right == left) {
1487 SP--; /* result is valid */
1488 if (left_non_neg == right_non_neg) {
1489 /* signs identical, result is positive. */
1490 SETu( result );
1491 RETURN;
1492 }
1493 /* 2s complement assumption */
1494 if (result <= (UV)IV_MIN)
02b08bbc 1495 SETi(result == (UV)IV_MIN ? IV_MIN : -(IV)result);
5479d192
NC
1496 else {
1497 /* It's exact but too negative for IV. */
1498 SETn( -(NV)result );
1499 }
1500 RETURN;
1501 } /* tried integer divide but it was not an integer result */
32fdb065 1502 } /* else (PERL_ABS(result) < 1.0) or (both UVs in range for NV) */
01f91bf2 1503 } /* one operand wasn't SvIOK */
5479d192
NC
1504#endif /* PERL_TRY_UV_DIVIDE */
1505 {
6f1401dc
DM
1506 NV right = SvNV_nomg(svr);
1507 NV left = SvNV_nomg(svl);
4efa5a16 1508 (void)POPs;(void)POPs;
ebc6a117
PD
1509#if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
1510 if (! Perl_isnan(right) && right == 0.0)
1511#else
659c4b96 1512 if (right == 0.0)
ebc6a117 1513#endif
5479d192
NC
1514 DIE(aTHX_ "Illegal division by zero");
1515 PUSHn( left / right );
1516 RETURN;
79072805 1517 }
a0d0e21e
LW
1518}
1519
1520PP(pp_modulo)
1521{
20b7effb 1522 dSP; dATARGET;
6f1401dc 1523 tryAMAGICbin_MG(modulo_amg, AMGf_assign|AMGf_numeric);
a0d0e21e 1524 {
9c5ffd7c
JH
1525 UV left = 0;
1526 UV right = 0;
dc656993
JH
1527 bool left_neg = FALSE;
1528 bool right_neg = FALSE;
e2c88acc
NC
1529 bool use_double = FALSE;
1530 bool dright_valid = FALSE;
9c5ffd7c
JH
1531 NV dright = 0.0;
1532 NV dleft = 0.0;
6f1401dc
DM
1533 SV * const svr = TOPs;
1534 SV * const svl = TOPm1s;
01f91bf2 1535 if (SvIV_please_nomg(svr)) {
800401ee 1536 right_neg = !SvUOK(svr);
e2c88acc 1537 if (!right_neg) {
800401ee 1538 right = SvUVX(svr);
e2c88acc 1539 } else {
800401ee 1540 const IV biv = SvIVX(svr);
e2c88acc
NC
1541 if (biv >= 0) {
1542 right = biv;
1543 right_neg = FALSE; /* effectively it's a UV now */
1544 } else {
02b08bbc 1545 right = (biv == IV_MIN) ? (UV)biv : (UV)(-biv);
e2c88acc
NC
1546 }
1547 }
1548 }
1549 else {
6f1401dc 1550 dright = SvNV_nomg(svr);
787eafbd
IZ
1551 right_neg = dright < 0;
1552 if (right_neg)
1553 dright = -dright;
e2c88acc
NC
1554 if (dright < UV_MAX_P1) {
1555 right = U_V(dright);
1556 dright_valid = TRUE; /* In case we need to use double below. */
1557 } else {
1558 use_double = TRUE;
1559 }
787eafbd 1560 }
a0d0e21e 1561
e2c88acc
NC
1562 /* At this point use_double is only true if right is out of range for
1563 a UV. In range NV has been rounded down to nearest UV and
1564 use_double false. */
01f91bf2 1565 if (!use_double && SvIV_please_nomg(svl)) {
800401ee 1566 left_neg = !SvUOK(svl);
e2c88acc 1567 if (!left_neg) {
800401ee 1568 left = SvUVX(svl);
e2c88acc 1569 } else {
800401ee 1570 const IV aiv = SvIVX(svl);
e2c88acc
NC
1571 if (aiv >= 0) {
1572 left = aiv;
1573 left_neg = FALSE; /* effectively it's a UV now */
1574 } else {
02b08bbc 1575 left = (aiv == IV_MIN) ? (UV)aiv : (UV)(-aiv);
e2c88acc
NC
1576 }
1577 }
e2c88acc 1578 }
787eafbd 1579 else {
6f1401dc 1580 dleft = SvNV_nomg(svl);
787eafbd
IZ
1581 left_neg = dleft < 0;
1582 if (left_neg)
1583 dleft = -dleft;
68dc0745 1584
e2c88acc
NC
1585 /* This should be exactly the 5.6 behaviour - if left and right are
1586 both in range for UV then use U_V() rather than floor. */
1587 if (!use_double) {
1588 if (dleft < UV_MAX_P1) {
1589 /* right was in range, so is dleft, so use UVs not double.
1590 */
1591 left = U_V(dleft);
1592 }
1593 /* left is out of range for UV, right was in range, so promote
1594 right (back) to double. */
1595 else {
1596 /* The +0.5 is used in 5.6 even though it is not strictly
1597 consistent with the implicit +0 floor in the U_V()
1598 inside the #if 1. */
1599 dleft = Perl_floor(dleft + 0.5);
1600 use_double = TRUE;
1601 if (dright_valid)
1602 dright = Perl_floor(dright + 0.5);
1603 else
1604 dright = right;
1605 }
1606 }
1607 }
6f1401dc 1608 sp -= 2;
787eafbd 1609 if (use_double) {
65202027 1610 NV dans;
787eafbd 1611
659c4b96 1612 if (!dright)
cea2e8a9 1613 DIE(aTHX_ "Illegal modulus zero");
787eafbd 1614
65202027 1615 dans = Perl_fmod(dleft, dright);
659c4b96 1616 if ((left_neg != right_neg) && dans)
787eafbd
IZ
1617 dans = dright - dans;
1618 if (right_neg)
1619 dans = -dans;
1620 sv_setnv(TARG, dans);
1621 }
1622 else {
1623 UV ans;
1624
787eafbd 1625 if (!right)
cea2e8a9 1626 DIE(aTHX_ "Illegal modulus zero");
787eafbd
IZ
1627
1628 ans = left % right;
1629 if ((left_neg != right_neg) && ans)
1630 ans = right - ans;
1631 if (right_neg) {
1632 /* XXX may warn: unary minus operator applied to unsigned type */
1633 /* could change -foo to be (~foo)+1 instead */
1634 if (ans <= ~((UV)IV_MAX)+1)
1635 sv_setiv(TARG, ~ans+1);
1636 else
65202027 1637 sv_setnv(TARG, -(NV)ans);
787eafbd
IZ
1638 }
1639 else
1640 sv_setuv(TARG, ans);
1641 }
1642 PUSHTARG;
1643 RETURN;
79072805 1644 }
a0d0e21e 1645}
79072805 1646
a0d0e21e
LW
1647PP(pp_repeat)
1648{
20b7effb 1649 dSP; dATARGET;
eb578fdb 1650 IV count;
6f1401dc
DM
1651 SV *sv;
1652
82334630 1653 if (GIMME_V == G_ARRAY && PL_op->op_private & OPpREPEAT_DOLIST) {
6f1401dc
DM
1654 /* TODO: think of some way of doing list-repeat overloading ??? */
1655 sv = POPs;
1656 SvGETMAGIC(sv);
1657 }
1658 else {
3a100dab
FC
1659 if (UNLIKELY(PL_op->op_private & OPpREPEAT_DOLIST)) {
1660 /* The parser saw this as a list repeat, and there
1661 are probably several items on the stack. But we're
1662 in scalar/void context, and there's no pp_list to save us
1663 now. So drop the rest of the items -- robin@kitsite.com
1664 */
1665 dMARK;
1666 if (MARK + 1 < SP) {
1667 MARK[1] = TOPm1s;
1668 MARK[2] = TOPs;
1669 }
1670 else {
1671 dTOPss;
1672 ASSUME(MARK + 1 == SP);
1673 XPUSHs(sv);
1674 MARK[1] = &PL_sv_undef;
1675 }
1676 SP = MARK + 2;
1677 }
6f1401dc
DM
1678 tryAMAGICbin_MG(repeat_amg, AMGf_assign);
1679 sv = POPs;
1680 }
1681
2b573ace
JH
1682 if (SvIOKp(sv)) {
1683 if (SvUOK(sv)) {
6f1401dc 1684 const UV uv = SvUV_nomg(sv);
2b573ace
JH
1685 if (uv > IV_MAX)
1686 count = IV_MAX; /* The best we can do? */
1687 else
1688 count = uv;
1689 } else {
b3211734 1690 count = SvIV_nomg(sv);
2b573ace
JH
1691 }
1692 }
1693 else if (SvNOKp(sv)) {
6f1401dc 1694 const NV nv = SvNV_nomg(sv);
2b573ace 1695 if (nv < 0.0)
b3211734 1696 count = -1; /* An arbitrary negative integer */
2b573ace
JH
1697 else
1698 count = (IV)nv;
1699 }
1700 else
6f1401dc
DM
1701 count = SvIV_nomg(sv);
1702
b3211734
KW
1703 if (count < 0) {
1704 count = 0;
1705 Perl_ck_warner(aTHX_ packWARN(WARN_NUMERIC),
1706 "Negative repeat count does nothing");
1707 }
1708
82334630 1709 if (GIMME_V == G_ARRAY && PL_op->op_private & OPpREPEAT_DOLIST) {
a0d0e21e 1710 dMARK;
a1894d81 1711 static const char* const oom_list_extend = "Out of memory during list extend";
0bd48802
AL
1712 const I32 items = SP - MARK;
1713 const I32 max = items * count;
da9e430b 1714 const U8 mod = PL_op->op_flags & OPf_MOD;
79072805 1715
2b573ace
JH
1716 MEM_WRAP_CHECK_1(max, SV*, oom_list_extend);
1717 /* Did the max computation overflow? */
27d5b266 1718 if (items > 0 && max > 0 && (max < items || max < count))
0157ef98 1719 Perl_croak(aTHX_ "%s", oom_list_extend);
a0d0e21e
LW
1720 MEXTEND(MARK, max);
1721 if (count > 1) {
1722 while (SP > MARK) {
60779a30
DM
1723 if (*SP) {
1724 if (mod && SvPADTMP(*SP)) {
da9e430b 1725 *SP = sv_mortalcopy(*SP);
60779a30 1726 }
976c8a39 1727 SvTEMP_off((*SP));
da9e430b 1728 }
a0d0e21e 1729 SP--;
79072805 1730 }
a0d0e21e
LW
1731 MARK++;
1732 repeatcpy((char*)(MARK + items), (char*)MARK,
ad64d0ec 1733 items * sizeof(const SV *), count - 1);
a0d0e21e 1734 SP += max;
79072805 1735 }
a0d0e21e
LW
1736 else if (count <= 0)
1737 SP -= items;
79072805 1738 }
a0d0e21e 1739 else { /* Note: mark already snarfed by pp_list */
0bd48802 1740 SV * const tmpstr = POPs;
a0d0e21e 1741 STRLEN len;
9b877dbb 1742 bool isutf;
a1894d81 1743 static const char* const oom_string_extend =
2b573ace 1744 "Out of memory during string extend";
a0d0e21e 1745
6f1401dc
DM
1746 if (TARG != tmpstr)
1747 sv_setsv_nomg(TARG, tmpstr);
1748 SvPV_force_nomg(TARG, len);
9b877dbb 1749 isutf = DO_UTF8(TARG);
8ebc5c01
PP
1750 if (count != 1) {
1751 if (count < 1)
1752 SvCUR_set(TARG, 0);
1753 else {
c445ea15 1754 const STRLEN max = (UV)count * len;
19a94d75 1755 if (len > MEM_SIZE_MAX / count)
0157ef98 1756 Perl_croak(aTHX_ "%s", oom_string_extend);
2b573ace 1757 MEM_WRAP_CHECK_1(max, char, oom_string_extend);
8569b9dc 1758 SvGROW(TARG, max + 1);
a0d0e21e 1759 repeatcpy(SvPVX(TARG) + len, SvPVX(TARG), len, count - 1);
b162af07 1760 SvCUR_set(TARG, SvCUR(TARG) * count);
7a4c00b4 1761 }
a0d0e21e 1762 *SvEND(TARG) = '\0';
a0d0e21e 1763 }
dfcb284a
GS
1764 if (isutf)
1765 (void)SvPOK_only_UTF8(TARG);
1766 else
1767 (void)SvPOK_only(TARG);
b80b6069 1768
a0d0e21e 1769 PUSHTARG;
79072805 1770 }
a0d0e21e
LW
1771 RETURN;
1772}
79072805 1773
a0d0e21e
LW
1774PP(pp_subtract)
1775{
20b7effb 1776 dSP; dATARGET; bool useleft; SV *svl, *svr;
6f1401dc
DM
1777 tryAMAGICbin_MG(subtr_amg, AMGf_assign|AMGf_numeric);
1778 svr = TOPs;
1779 svl = TOPm1s;
800401ee 1780 useleft = USE_LEFT(svl);
28e5dec8 1781#ifdef PERL_PRESERVE_IVUV
7dca457a
NC
1782 /* See comments in pp_add (in pp_hot.c) about Overflow, and how
1783 "bad things" happen if you rely on signed integers wrapping. */
01f91bf2 1784 if (SvIV_please_nomg(svr)) {
28e5dec8
JH
1785 /* Unless the left argument is integer in range we are going to have to
1786 use NV maths. Hence only attempt to coerce the right argument if
1787 we know the left is integer. */
eb578fdb 1788 UV auv = 0;
9c5ffd7c 1789 bool auvok = FALSE;
7dca457a
NC
1790 bool a_valid = 0;
1791
28e5dec8 1792 if (!useleft) {
7dca457a
NC
1793 auv = 0;
1794 a_valid = auvok = 1;
1795 /* left operand is undef, treat as zero. */
28e5dec8
JH
1796 } else {
1797 /* Left operand is defined, so is it IV? */
01f91bf2 1798 if (SvIV_please_nomg(svl)) {
800401ee
JH
1799 if ((auvok = SvUOK(svl)))
1800 auv = SvUVX(svl);
7dca457a 1801 else {
eb578fdb 1802 const IV aiv = SvIVX(svl);
7dca457a
NC
1803 if (aiv >= 0) {
1804 auv = aiv;
1805 auvok = 1; /* Now acting as a sign flag. */
1806 } else { /* 2s complement assumption for IV_MIN */
53e2bfb7 1807 auv = (aiv == IV_MIN) ? (UV)aiv : (UV)-aiv;
28e5dec8 1808 }
7dca457a
NC
1809 }
1810 a_valid = 1;
1811 }
1812 }
1813 if (a_valid) {
1814 bool result_good = 0;
1815 UV result;
eb578fdb 1816 UV buv;
800401ee 1817 bool buvok = SvUOK(svr);
9041c2e3 1818
7dca457a 1819 if (buvok)
800401ee 1820 buv = SvUVX(svr);
7dca457a 1821 else {
eb578fdb 1822 const IV biv = SvIVX(svr);
7dca457a
NC
1823 if (biv >= 0) {
1824 buv = biv;
1825 buvok = 1;
1826 } else
53e2bfb7 1827 buv = (biv == IV_MIN) ? (UV)biv : (UV)-biv;
7dca457a
NC
1828 }
1829 /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve,
602f51c4 1830 else "IV" now, independent of how it came in.
7dca457a
NC
1831 if a, b represents positive, A, B negative, a maps to -A etc
1832 a - b => (a - b)
1833 A - b => -(a + b)
1834 a - B => (a + b)
1835 A - B => -(a - b)
1836 all UV maths. negate result if A negative.
1837 subtract if signs same, add if signs differ. */
1838
1839 if (auvok ^ buvok) {
1840 /* Signs differ. */
1841 result = auv + buv;
1842 if (result >= auv)
1843 result_good = 1;
1844 } else {
1845 /* Signs same */
1846 if (auv >= buv) {
1847 result = auv - buv;
1848 /* Must get smaller */
1849 if (result <= auv)
1850 result_good = 1;
1851 } else {
1852 result = buv - auv;
1853 if (result <= buv) {
1854 /* result really should be -(auv-buv). as its negation
1855 of true value, need to swap our result flag */
1856 auvok = !auvok;
1857 result_good = 1;
28e5dec8 1858 }
28e5dec8
JH
1859 }
1860 }
7dca457a
NC
1861 if (result_good) {
1862 SP--;
1863 if (auvok)
1864 SETu( result );
1865 else {
1866 /* Negate result */
1867 if (result <= (UV)IV_MIN)
53e2bfb7
DM
1868 SETi(result == (UV)IV_MIN
1869 ? IV_MIN : -(IV)result);
7dca457a
NC
1870 else {
1871 /* result valid, but out of range for IV. */
1872 SETn( -(NV)result );
1873 }
1874 }
1875 RETURN;
1876 } /* Overflow, drop through to NVs. */
28e5dec8
JH
1877 }
1878 }
1879#endif
a0d0e21e 1880 {
6f1401dc 1881 NV value = SvNV_nomg(svr);
4efa5a16
RD
1882 (void)POPs;
1883
28e5dec8
JH
1884 if (!useleft) {
1885 /* left operand is undef, treat as zero - value */
1886 SETn(-value);
1887 RETURN;
1888 }
6f1401dc 1889 SETn( SvNV_nomg(svl) - value );
28e5dec8 1890 RETURN;
79072805 1891 }
a0d0e21e 1892}
79072805 1893
a0d0e21e
LW
1894PP(pp_left_shift)
1895{
20b7effb 1896 dSP; dATARGET; SV *svl, *svr;
a42d0242 1897 tryAMAGICbin_MG(lshift_amg, AMGf_assign|AMGf_numeric);
6f1401dc
DM
1898 svr = POPs;
1899 svl = TOPs;
a0d0e21e 1900 {
6f1401dc 1901 const IV shift = SvIV_nomg(svr);
d0ba1bd2 1902 if (PL_op->op_private & HINT_INTEGER) {
6f1401dc 1903 const IV i = SvIV_nomg(svl);
972b05a9 1904 SETi(i << shift);
d0ba1bd2
JH
1905 }
1906 else {
6f1401dc 1907 const UV u = SvUV_nomg(svl);
972b05a9 1908 SETu(u << shift);
d0ba1bd2 1909 }
55497cff 1910 RETURN;
79072805 1911 }
a0d0e21e 1912}
79072805 1913
a0d0e21e
LW
1914PP(pp_right_shift)
1915{
20b7effb 1916 dSP; dATARGET; SV *svl, *svr;
a42d0242 1917 tryAMAGICbin_MG(rshift_amg, AMGf_assign|AMGf_numeric);
6f1401dc
DM
1918 svr = POPs;
1919 svl = TOPs;
a0d0e21e 1920 {
6f1401dc 1921 const IV shift = SvIV_nomg(svr);
d0ba1bd2 1922 if (PL_op->op_private & HINT_INTEGER) {
6f1401dc 1923 const IV i = SvIV_nomg(svl);
972b05a9 1924 SETi(i >> shift);
d0ba1bd2
JH
1925 }
1926 else {
6f1401dc 1927 const UV u = SvUV_nomg(svl);
972b05a9 1928 SETu(u >> shift);
d0ba1bd2 1929 }
a0d0e21e 1930 RETURN;
93a17b20 1931 }
79072805
LW
1932}
1933
a0d0e21e 1934PP(pp_lt)
79072805 1935{
20b7effb 1936 dSP;
33efebe6
DM
1937 SV *left, *right;
1938
a42d0242 1939 tryAMAGICbin_MG(lt_amg, AMGf_set|AMGf_numeric);
33efebe6
DM
1940 right = POPs;
1941 left = TOPs;
1942 SETs(boolSV(
1943 (SvIOK_notUV(left) && SvIOK_notUV(right))
1944 ? (SvIVX(left) < SvIVX(right))
1945 : (do_ncmp(left, right) == -1)
1946 ));
1947 RETURN;
a0d0e21e 1948}
79072805 1949
a0d0e21e
LW
1950PP(pp_gt)
1951{
20b7effb 1952 dSP;
33efebe6 1953 SV *left, *right;
1b6737cc 1954
33efebe6
DM
1955 tryAMAGICbin_MG(gt_amg, AMGf_set|AMGf_numeric);
1956 right = POPs;
1957 left = TOPs;
1958 SETs(boolSV(
1959 (SvIOK_notUV(left) && SvIOK_notUV(right))
1960 ? (SvIVX(left) > SvIVX(right))
1961 : (do_ncmp(left, right) == 1)
1962 ));
1963 RETURN;
a0d0e21e
LW
1964}
1965
1966PP(pp_le)
1967{
20b7effb 1968 dSP;
33efebe6 1969 SV *left, *right;
1b6737cc 1970
33efebe6
DM
1971 tryAMAGICbin_MG(le_amg, AMGf_set|AMGf_numeric);
1972 right = POPs;
1973 left = TOPs;
1974 SETs(boolSV(
1975 (SvIOK_notUV(left) && SvIOK_notUV(right))
1976 ? (SvIVX(left) <= SvIVX(right))
1977 : (do_ncmp(left, right) <= 0)
1978 ));
1979 RETURN;
a0d0e21e
LW
1980}
1981
1982PP(pp_ge)
1983{
20b7effb 1984 dSP;
33efebe6
DM
1985 SV *left, *right;
1986
1987 tryAMAGICbin_MG(ge_amg, AMGf_set|AMGf_numeric);
1988 right = POPs;
1989 left = TOPs;
1990 SETs(boolSV(
1991 (SvIOK_notUV(left) && SvIOK_notUV(right))
1992 ? (SvIVX(left) >= SvIVX(right))
1993 : ( (do_ncmp(left, right) & 2) == 0)
1994 ));
1995 RETURN;
1996}
1b6737cc 1997
33efebe6
DM
1998PP(pp_ne)
1999{
20b7effb 2000 dSP;
33efebe6
DM
2001 SV *left, *right;
2002
2003 tryAMAGICbin_MG(ne_amg, AMGf_set|AMGf_numeric);
2004 right = POPs;
2005 left = TOPs;
2006 SETs(boolSV(
2007 (SvIOK_notUV(left) && SvIOK_notUV(right))
2008 ? (SvIVX(left) != SvIVX(right))
2009 : (do_ncmp(left, right) != 0)
2010 ));
2011 RETURN;
2012}
1b6737cc 2013
33efebe6
DM
2014/* compare left and right SVs. Returns:
2015 * -1: <
2016 * 0: ==
2017 * 1: >
2018 * 2: left or right was a NaN
2019 */
2020I32
2021Perl_do_ncmp(pTHX_ SV* const left, SV * const right)
2022{
33efebe6
DM
2023 PERL_ARGS_ASSERT_DO_NCMP;
2024#ifdef PERL_PRESERVE_IVUV
33efebe6 2025 /* Fortunately it seems NaN isn't IOK */
01f91bf2 2026 if (SvIV_please_nomg(right) && SvIV_please_nomg(left)) {
33efebe6
DM
2027 if (!SvUOK(left)) {
2028 const IV leftiv = SvIVX(left);
2029 if (!SvUOK(right)) {
2030 /* ## IV <=> IV ## */
2031 const IV rightiv = SvIVX(right);
2032 return (leftiv > rightiv) - (leftiv < rightiv);
28e5dec8 2033 }
33efebe6
DM
2034 /* ## IV <=> UV ## */
2035 if (leftiv < 0)
2036 /* As (b) is a UV, it's >=0, so it must be < */
2037 return -1;
2038 {
2039 const UV rightuv = SvUVX(right);
2040 return ((UV)leftiv > rightuv) - ((UV)leftiv < rightuv);
28e5dec8 2041 }
28e5dec8 2042 }
79072805 2043
33efebe6
DM
2044 if (SvUOK(right)) {
2045 /* ## UV <=> UV ## */
2046 const UV leftuv = SvUVX(left);
2047 const UV rightuv = SvUVX(right);
2048 return (leftuv > rightuv) - (leftuv < rightuv);
28e5dec8 2049 }
33efebe6
DM
2050 /* ## UV <=> IV ## */
2051 {
2052 const IV rightiv = SvIVX(right);
2053 if (rightiv < 0)
2054 /* As (a) is a UV, it's >=0, so it cannot be < */
2055 return 1;
2056 {
2057 const UV leftuv = SvUVX(left);
2058 return (leftuv > (UV)rightiv) - (leftuv < (UV)rightiv);
28e5dec8 2059 }
28e5dec8 2060 }
e5964223 2061 NOT_REACHED; /* NOTREACHED */
28e5dec8
JH
2062 }
2063#endif
a0d0e21e 2064 {
33efebe6
DM
2065 NV const rnv = SvNV_nomg(right);
2066 NV const lnv = SvNV_nomg(left);
2067
cab190d4 2068#if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
33efebe6
DM
2069 if (Perl_isnan(lnv) || Perl_isnan(rnv)) {
2070 return 2;
2071 }
2072 return (lnv > rnv) - (lnv < rnv);
cab190d4 2073#else
33efebe6
DM
2074 if (lnv < rnv)
2075 return -1;
2076 if (lnv > rnv)
2077 return 1;
659c4b96 2078 if (lnv == rnv)
33efebe6
DM
2079 return 0;
2080 return 2;
cab190d4 2081#endif
a0d0e21e 2082 }
79072805
LW
2083}
2084
33efebe6 2085
a0d0e21e 2086PP(pp_ncmp)
79072805 2087{
20b7effb 2088 dSP;
33efebe6
DM
2089 SV *left, *right;
2090 I32 value;
a42d0242 2091 tryAMAGICbin_MG(ncmp_amg, AMGf_numeric);
33efebe6
DM
2092 right = POPs;
2093 left = TOPs;
2094 value = do_ncmp(left, right);
2095 if (value == 2) {
3280af22 2096 SETs(&PL_sv_undef);
79072805 2097 }
33efebe6
DM
2098 else {
2099 dTARGET;
2100 SETi(value);
2101 }
2102 RETURN;
a0d0e21e 2103}
79072805 2104
b1c05ba5
DM
2105
2106/* also used for: pp_sge() pp_sgt() pp_slt() */
2107
afd9910b 2108PP(pp_sle)
a0d0e21e 2109{
20b7effb 2110 dSP;
79072805 2111
afd9910b
NC
2112 int amg_type = sle_amg;
2113 int multiplier = 1;
2114 int rhs = 1;
79072805 2115
afd9910b
NC
2116 switch (PL_op->op_type) {
2117 case OP_SLT:
2118 amg_type = slt_amg;
2119 /* cmp < 0 */
2120 rhs = 0;
2121 break;
2122 case OP_SGT:
2123 amg_type = sgt_amg;
2124 /* cmp > 0 */
2125 multiplier = -1;
2126 rhs = 0;
2127 break;
2128 case OP_SGE:
2129 amg_type = sge_amg;
2130 /* cmp >= 0 */
2131 multiplier = -1;
2132 break;
79072805 2133 }
79072805 2134
6f1401dc 2135 tryAMAGICbin_MG(amg_type, AMGf_set);
a0d0e21e
LW
2136 {
2137 dPOPTOPssrl;
130c5df3 2138 const int cmp =
5778acb6 2139#ifdef USE_LOCALE_COLLATE
130c5df3
KW
2140 (IN_LC_RUNTIME(LC_COLLATE))
2141 ? sv_cmp_locale_flags(left, right, 0)
2142 :
2143#endif
2144 sv_cmp_flags(left, right, 0);
afd9910b 2145 SETs(boolSV(cmp * multiplier < rhs));
a0d0e21e
LW
2146 RETURN;
2147 }
2148}
79072805 2149
36477c24
PP
2150PP(pp_seq)
2151{
20b7effb 2152 dSP;
6f1401dc 2153 tryAMAGICbin_MG(seq_amg, AMGf_set);
36477c24
PP
2154 {
2155 dPOPTOPssrl;
078504b2 2156 SETs(boolSV(sv_eq_flags(left, right, 0)));
a0d0e21e
LW
2157 RETURN;
2158 }
2159}
79072805 2160
a0d0e21e 2161PP(pp_sne)
79072805 2162{
20b7effb 2163 dSP;
6f1401dc 2164 tryAMAGICbin_MG(sne_amg, AMGf_set);
a0d0e21e
LW
2165 {
2166 dPOPTOPssrl;
078504b2 2167 SETs(boolSV(!sv_eq_flags(left, right, 0)));
a0d0e21e 2168 RETURN;
463ee0b2 2169 }
79072805
LW
2170}
2171
a0d0e21e 2172PP(pp_scmp)
79072805 2173{
20b7effb 2174 dSP; dTARGET;
6f1401dc 2175 tryAMAGICbin_MG(scmp_amg, 0);
a0d0e21e
LW
2176 {
2177 dPOPTOPssrl;
130c5df3 2178 const int cmp =
5778acb6 2179#ifdef USE_LOCALE_COLLATE
130c5df3
KW
2180 (IN_LC_RUNTIME(LC_COLLATE))
2181 ? sv_cmp_locale_flags(left, right, 0)
2182 :
2183#endif
2184 sv_cmp_flags(left, right, 0);
bbce6d69 2185 SETi( cmp );
a0d0e21e
LW
2186 RETURN;
2187 }
2188}
79072805 2189
55497cff
PP
2190PP(pp_bit_and)
2191{
20b7effb 2192 dSP; dATARGET;
6f1401dc 2193 tryAMAGICbin_MG(band_amg, AMGf_assign);
a0d0e21e
LW
2194 {
2195 dPOPTOPssrl;
4633a7c4 2196 if (SvNIOKp(left) || SvNIOKp(right)) {
b20c4ee1
FC
2197 const bool left_ro_nonnum = !SvNIOKp(left) && SvREADONLY(left);
2198 const bool right_ro_nonnum = !SvNIOKp(right) && SvREADONLY(right);
d0ba1bd2 2199 if (PL_op->op_private & HINT_INTEGER) {
1b6737cc 2200 const IV i = SvIV_nomg(left) & SvIV_nomg(right);
972b05a9 2201 SETi(i);
d0ba1bd2
JH
2202 }
2203 else {
1b6737cc 2204 const UV u = SvUV_nomg(left) & SvUV_nomg(right);
972b05a9 2205 SETu(u);
d0ba1bd2 2206 }
5ee80e13 2207 if (left_ro_nonnum && left != TARG) SvNIOK_off(left);
b20c4ee1 2208 if (right_ro_nonnum) SvNIOK_off(right);
a0d0e21e
LW
2209 }
2210 else {
533c011a 2211 do_vop(PL_op->op_type, TARG, left, right);
a0d0e21e
LW
2212 SETTARG;
2213 }
2214 RETURN;
2215 }
2216}
79072805 2217
b1c05ba5
DM
2218
2219/* also used for: pp_bit_xor() */
2220
a0d0e21e
LW
2221PP(pp_bit_or)
2222{
20b7effb 2223 dSP; dATARGET;
3658c1f1
NC
2224 const int op_type = PL_op->op_type;
2225
6f1401dc 2226 tryAMAGICbin_MG((op_type == OP_BIT_OR ? bor_amg : bxor_amg), AMGf_assign);
a0d0e21e
LW
2227 {
2228 dPOPTOPssrl;
4633a7c4 2229 if (SvNIOKp(left) || SvNIOKp(right)) {
b20c4ee1
FC
2230 const bool left_ro_nonnum = !SvNIOKp(left) && SvREADONLY(left);
2231 const bool right_ro_nonnum = !SvNIOKp(right) && SvREADONLY(right);
d0ba1bd2 2232 if (PL_op->op_private & HINT_INTEGER) {
3658c1f1
NC
2233 const IV l = (USE_LEFT(left) ? SvIV_nomg(left) : 0);
2234 const IV r = SvIV_nomg(right);
2235 const IV result = op_type == OP_BIT_OR ? (l | r) : (l ^ r);
2236 SETi(result);
d0ba1bd2
JH
2237 }
2238 else {
3658c1f1
NC
2239 const UV l = (USE_LEFT(left) ? SvUV_nomg(left) : 0);
2240 const UV r = SvUV_nomg(right);
2241 const UV result = op_type == OP_BIT_OR ? (l | r) : (l ^ r);
2242 SETu(result);
d0ba1bd2 2243 }
5ee80e13 2244 if (left_ro_nonnum && left != TARG) SvNIOK_off(left);
b20c4ee1 2245 if (right_ro_nonnum) SvNIOK_off(right);
a0d0e21e
LW
2246 }
2247 else {
3658c1f1 2248 do_vop(op_type, TARG, left, right);
a0d0e21e
LW
2249 SETTARG;
2250 }
2251 RETURN;
79072805 2252 }
a0d0e21e 2253}
79072805 2254
1c2b3fd6
FC
2255PERL_STATIC_INLINE bool
2256S_negate_string(pTHX)
2257{
2258 dTARGET; dSP;
2259 STRLEN len;
2260 const char *s;
2261 SV * const sv = TOPs;
2262 if (!SvPOKp(sv) || SvNIOK(sv) || (!SvPOK(sv) && SvNIOKp(sv)))
2263 return FALSE;
2264 s = SvPV_nomg_const(sv, len);
2265 if (isIDFIRST(*s)) {
2266 sv_setpvs(TARG, "-");
2267 sv_catsv(TARG, sv);
2268 }
2269 else if (*s == '+' || (*s == '-' && !looks_like_number(sv))) {
2270 sv_setsv_nomg(TARG, sv);
2271 *SvPV_force_nomg(TARG, len) = *s == '-' ? '+' : '-';
2272 }
2273 else return FALSE;
245d035e 2274 SETTARG;
1c2b3fd6
FC
2275 return TRUE;
2276}
2277
a0d0e21e
LW
2278PP(pp_negate)
2279{
20b7effb 2280 dSP; dTARGET;
6f1401dc 2281 tryAMAGICun_MG(neg_amg, AMGf_numeric);
1c2b3fd6 2282 if (S_negate_string(aTHX)) return NORMAL;
a0d0e21e 2283 {
6f1401dc 2284 SV * const sv = TOPs;
a5b92898 2285
d96ab1b5 2286 if (SvIOK(sv)) {
7dbe3150 2287 /* It's publicly an integer */
28e5dec8 2288 oops_its_an_int:
9b0e499b
GS
2289 if (SvIsUV(sv)) {
2290 if (SvIVX(sv) == IV_MIN) {
28e5dec8 2291 /* 2s complement assumption. */
d14578b8
KW
2292 SETi(SvIVX(sv)); /* special case: -((UV)IV_MAX+1) ==
2293 IV_MIN */
245d035e 2294 return NORMAL;
9b0e499b
GS
2295 }
2296 else if (SvUVX(sv) <= IV_MAX) {
beccb14c 2297 SETi(-SvIVX(sv));
245d035e 2298 return NORMAL;
9b0e499b
GS
2299 }
2300 }
2301 else if (SvIVX(sv) != IV_MIN) {
2302 SETi(-SvIVX(sv));
245d035e 2303 return NORMAL;
9b0e499b 2304 }
28e5dec8
JH
2305#ifdef PERL_PRESERVE_IVUV
2306 else {
2307 SETu((UV)IV_MIN);
245d035e 2308 return NORMAL;
28e5dec8
JH
2309 }
2310#endif
9b0e499b 2311 }
8a5decd8 2312 if (SvNIOKp(sv) && (SvNIOK(sv) || !SvPOK(sv)))
6f1401dc 2313 SETn(-SvNV_nomg(sv));
1c2b3fd6 2314 else if (SvPOKp(sv) && SvIV_please_nomg(sv))
8eb28a70 2315 goto oops_its_an_int;
4633a7c4 2316 else
6f1401dc 2317 SETn(-SvNV_nomg(sv));
79072805 2318 }
245d035e 2319 return NORMAL;
79072805
LW
2320}
2321
a0d0e21e 2322PP(pp_not)
79072805 2323{
20b7effb 2324 dSP;
6f1401dc 2325 tryAMAGICun_MG(not_amg, AMGf_set);
06c841cf 2326 *PL_stack_sp = boolSV(!SvTRUE_nomg(*PL_stack_sp));
a0d0e21e 2327 return NORMAL;
79072805
LW
2328}
2329
a0d0e21e 2330PP(pp_complement)
79072805 2331{
20b7effb 2332 dSP; dTARGET;
a42d0242 2333 tryAMAGICun_MG(compl_amg, AMGf_numeric);
a0d0e21e
LW
2334 {
2335 dTOPss;
4633a7c4 2336 if (SvNIOKp(sv)) {
d0ba1bd2 2337 if (PL_op->op_private & HINT_INTEGER) {
1b6737cc 2338 const IV i = ~SvIV_nomg(sv);
972b05a9 2339 SETi(i);
d0ba1bd2
JH
2340 }
2341 else {
1b6737cc 2342 const UV u = ~SvUV_nomg(sv);
972b05a9 2343 SETu(u);
d0ba1bd2 2344 }
a0d0e21e
LW
2345 }
2346 else {
eb578fdb
KW
2347 U8 *tmps;
2348 I32 anum;
a0d0e21e
LW
2349 STRLEN len;
2350
85b0ee6e
FC
2351 sv_copypv_nomg(TARG, sv);
2352 tmps = (U8*)SvPV_nomg(TARG, len);
a0d0e21e 2353 anum = len;
1d68d6cd 2354 if (SvUTF8(TARG)) {
a1ca4561 2355 /* Calculate exact length, let's not estimate. */
1d68d6cd 2356 STRLEN targlen = 0;
ba210ebe 2357 STRLEN l;
a1ca4561
YST
2358 UV nchar = 0;
2359 UV nwide = 0;
01f6e806 2360 U8 * const send = tmps + len;
74d49cd0
ST
2361 U8 * const origtmps = tmps;
2362 const UV utf8flags = UTF8_ALLOW_ANYUV;
1d68d6cd 2363
1d68d6cd 2364 while (tmps < send) {
74d49cd0
ST
2365 const UV c = utf8n_to_uvchr(tmps, send-tmps, &l, utf8flags);
2366 tmps += l;
5bbb0b5a 2367 targlen += UNISKIP(~c);
a1ca4561
YST
2368 nchar++;
2369 if (c > 0xff)
2370 nwide++;
1d68d6cd
SC
2371 }
2372
2373 /* Now rewind strings and write them. */
74d49cd0 2374 tmps = origtmps;
a1ca4561
YST
2375
2376 if (nwide) {
01f6e806
AL
2377 U8 *result;
2378 U8 *p;
2379
74d49cd0 2380 Newx(result, targlen + 1, U8);
01f6e806 2381 p = result;
a1ca4561 2382 while (tmps < send) {
74d49cd0
ST
2383 const UV c = utf8n_to_uvchr(tmps, send-tmps, &l, utf8flags);
2384 tmps += l;
01f6e806 2385 p = uvchr_to_utf8_flags(p, ~c, UNICODE_ALLOW_ANY);
a1ca4561 2386 }
01f6e806 2387 *p = '\0';
c1c21316
NC
2388 sv_usepvn_flags(TARG, (char*)result, targlen,
2389 SV_HAS_TRAILING_NUL);
a1ca4561
YST
2390 SvUTF8_on(TARG);
2391 }
2392 else {
01f6e806
AL
2393 U8 *result;
2394 U8 *p;
2395
74d49cd0 2396 Newx(result, nchar + 1, U8);
01f6e806 2397 p = result;
a1ca4561 2398 while (tmps < send) {
74d49cd0
ST
2399 const U8 c = (U8)utf8n_to_uvchr(tmps, send-tmps, &l, utf8flags);
2400 tmps += l;
01f6e806 2401 *p++ = ~c;
a1ca4561 2402 }
01f6e806 2403 *p = '\0';
c1c21316 2404 sv_usepvn_flags(TARG, (char*)result, nchar, SV_HAS_TRAILING_NUL);
d0a21e00 2405 SvUTF8_off(TARG);
1d68d6cd 2406 }
ec93b65f 2407 SETTARG;
24840750 2408 return NORMAL;
1d68d6cd 2409 }
a0d0e21e 2410#ifdef LIBERAL
51723571 2411 {
eb578fdb 2412 long *tmpl;
51723571
JH
2413 for ( ; anum && (unsigned long)tmps % sizeof(long); anum--, tmps++)
2414 *tmps = ~*tmps;
2415 tmpl = (long*)tmps;
bb7a0f54 2416 for ( ; anum >= (I32)sizeof(long); anum -= (I32)sizeof(long), tmpl++)
51723571
JH
2417 *tmpl = ~*tmpl;
2418 tmps = (U8*)tmpl;
2419 }
a0d0e21e
LW
2420#endif
2421 for ( ; anum > 0; anum--, tmps++)
2422 *tmps = ~*tmps;
ec93b65f 2423 SETTARG;
a0d0e21e 2424 }
24840750 2425 return NORMAL;
a0d0e21e 2426 }
79072805
LW
2427}
2428
a0d0e21e
LW
2429/* integer versions of some of the above */
2430
a0d0e21e 2431PP(pp_i_multiply)
79072805 2432{
20b7effb 2433 dSP; dATARGET;
6f1401dc 2434 tryAMAGICbin_MG(mult_amg, AMGf_assign);
a0d0e21e 2435 {
6f1401dc 2436 dPOPTOPiirl_nomg;
a0d0e21e
LW
2437 SETi( left * right );
2438 RETURN;
2439 }
79072805
LW
2440}
2441
a0d0e21e 2442PP(pp_i_divide)
79072805 2443{
85935d8e 2444 IV num;
20b7effb 2445 dSP; dATARGET;
6f1401dc 2446 tryAMAGICbin_MG(div_amg, AMGf_assign);
a0d0e21e 2447 {
6f1401dc 2448 dPOPTOPssrl;
85935d8e 2449 IV value = SvIV_nomg(right);
a0d0e21e 2450 if (value == 0)
ece1bcef 2451 DIE(aTHX_ "Illegal division by zero");
85935d8e 2452 num = SvIV_nomg(left);
a0cec769
YST
2453
2454 /* avoid FPE_INTOVF on some platforms when num is IV_MIN */
2455 if (value == -1)
2456 value = - num;
2457 else
2458 value = num / value;
6f1401dc 2459 SETi(value);
a0d0e21e
LW
2460 RETURN;
2461 }
79072805
LW
2462}
2463
bf3d06aa
JC
2464#if defined(__GLIBC__) && IVSIZE == 8 && !defined(PERL_DEBUG_READONLY_OPS) \
2465 && ( __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 8))
224ec323
JH
2466STATIC
2467PP(pp_i_modulo_0)
befad5d1
NC
2468#else
2469PP(pp_i_modulo)
2470#endif
224ec323
JH
2471{
2472 /* This is the vanilla old i_modulo. */
20b7effb 2473 dSP; dATARGET;
6f1401dc 2474 tryAMAGICbin_MG(modulo_amg, AMGf_assign);
224ec323 2475 {
6f1401dc 2476 dPOPTOPiirl_nomg;
224ec323
JH
2477 if (!right)
2478 DIE(aTHX_ "Illegal modulus zero");
a0cec769
YST
2479 /* avoid FPE_INTOVF on some platforms when left is IV_MIN */
2480 if (right == -1)
2481 SETi( 0 );
2482 else
2483 SETi( left % right );
224ec323
JH
2484 RETURN;
2485 }
2486}
2487
bf3d06aa
JC
2488#if defined(__GLIBC__) && IVSIZE == 8 && !defined(PERL_DEBUG_READONLY_OPS) \
2489 && ( __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 8))
224ec323
JH
2490STATIC
2491PP(pp_i_modulo_1)
befad5d1 2492
224ec323 2493{
224ec323 2494 /* This is the i_modulo with the workaround for the _moddi3 bug
fce2b89e 2495 * in (at least) glibc 2.2.5 (the PERL_ABS() the workaround).
224ec323 2496 * See below for pp_i_modulo. */
20b7effb 2497 dSP; dATARGET;
6f1401dc 2498 tryAMAGICbin_MG(modulo_amg, AMGf_assign);
224ec323 2499 {
6f1401dc 2500 dPOPTOPiirl_nomg;
224ec323
JH
2501 if (!right)
2502 DIE(aTHX_ "Illegal modulus zero");
a0cec769
YST
2503 /* avoid FPE_INTOVF on some platforms when left is IV_MIN */
2504 if (right == -1)
2505 SETi( 0 );
2506 else
2507 SETi( left % PERL_ABS(right) );
224ec323
JH
2508 RETURN;
2509 }
224ec323
JH
2510}
2511
a0d0e21e 2512PP(pp_i_modulo)
79072805 2513{
6f1401dc
DM
2514 dVAR; dSP; dATARGET;
2515 tryAMAGICbin_MG(modulo_amg, AMGf_assign);
224ec323 2516 {
6f1401dc 2517 dPOPTOPiirl_nomg;
224ec323
JH
2518 if (!right)
2519 DIE(aTHX_ "Illegal modulus zero");
2520 /* The assumption is to use hereafter the old vanilla version... */
2521 PL_op->op_ppaddr =
2522 PL_ppaddr[OP_I_MODULO] =
1c127fab 2523 Perl_pp_i_modulo_0;
224ec323 2524 /* .. but if we have glibc, we might have a buggy _moddi3
bf3d06aa 2525 * (at least glibc 2.2.5 is known to have this bug), in other
224ec323
JH
2526 * words our integer modulus with negative quad as the second
2527 * argument might be broken. Test for this and re-patch the
2528 * opcode dispatch table if that is the case, remembering to
2529 * also apply the workaround so that this first round works
2530 * right, too. See [perl #9402] for more information. */
224ec323
JH
2531 {
2532 IV l = 3;
2533 IV r = -10;
2534 /* Cannot do this check with inlined IV constants since
2535 * that seems to work correctly even with the buggy glibc. */
2536 if (l % r == -3) {
2537 /* Yikes, we have the bug.
2538 * Patch in the workaround version. */
2539 PL_op->op_ppaddr =
2540 PL_ppaddr[OP_I_MODULO] =
2541 &Perl_pp_i_modulo_1;
2542 /* Make certain we work right this time, too. */
32fdb065 2543 right = PERL_ABS(right);
224ec323
JH
2544 }
2545 }
a0cec769
YST
2546 /* avoid FPE_INTOVF on some platforms when left is IV_MIN */
2547 if (right == -1)
2548 SETi( 0 );
2549 else
2550 SETi( left % right );
224ec323
JH
2551 RETURN;
2552 }
79072805 2553}
befad5d1 2554#endif
79072805 2555
a0d0e21e 2556PP(pp_i_add)
79072805 2557{
20b7effb 2558 dSP; dATARGET;
6f1401dc 2559 tryAMAGICbin_MG(add_amg, AMGf_assign);
a0d0e21e 2560 {
6f1401dc 2561 dPOPTOPiirl_ul_nomg;
a0d0e21e
LW
2562 SETi( left + right );
2563 RETURN;
79072805 2564 }
79072805
LW
2565}
2566
a0d0e21e 2567PP(pp_i_subtract)
79072805 2568{
20b7effb 2569 dSP; dATARGET;
6f1401dc 2570 tryAMAGICbin_MG(subtr_amg, AMGf_assign);
a0d0e21e 2571 {
6f1401dc 2572 dPOPTOPiirl_ul_nomg;
a0d0e21e
LW
2573 SETi( left - right );
2574 RETURN;
79072805 2575 }
79072805
LW
2576}
2577
a0d0e21e 2578PP(pp_i_lt)
79072805 2579{
20b7effb 2580 dSP;
6f1401dc 2581 tryAMAGICbin_MG(lt_amg, AMGf_set);
a0d0e21e 2582 {
96b6b87f 2583 dPOPTOPiirl_nomg;
54310121 2584 SETs(boolSV(left < right));
a0d0e21e
LW
2585 RETURN;
2586 }
79072805
LW
2587}
2588
a0d0e21e 2589PP(pp_i_gt)
79072805 2590{
20b7effb 2591 dSP;
6f1401dc 2592 tryAMAGICbin_MG(gt_amg, AMGf_set);
a0d0e21e 2593 {
96b6b87f 2594 dPOPTOPiirl_nomg;
54310121 2595 SETs(boolSV(left > right));
a0d0e21e
LW
2596 RETURN;
2597 }
79072805
LW
2598}
2599
a0d0e21e 2600PP(pp_i_le)
79072805 2601{
20b7effb 2602 dSP;
6f1401dc 2603 tryAMAGICbin_MG(le_amg, AMGf_set);
a0d0e21e 2604 {
96b6b87f 2605 dPOPTOPiirl_nomg;
54310121 2606 SETs(boolSV(left <= right));
a0d0e21e 2607 RETURN;
85e6fe83 2608 }
79072805
LW
2609}
2610
a0d0e21e 2611PP(pp_i_ge)
79072805 2612{
20b7effb 2613 dSP;
6f1401dc 2614 tryAMAGICbin_MG(ge_amg, AMGf_set);
a0d0e21e 2615 {
96b6b87f 2616 dPOPTOPiirl_nomg;
54310121 2617 SETs(boolSV(left >= right));
a0d0e21e
LW
2618 RETURN;
2619 }
79072805
LW
2620}
2621
a0d0e21e 2622PP(pp_i_eq)
79072805 2623{
20b7effb 2624 dSP;
6f1401dc 2625 tryAMAGICbin_MG(eq_amg, AMGf_set);
a0d0e21e 2626 {
96b6b87f 2627 dPOPTOPiirl_nomg;
54310121 2628 SETs(boolSV(left == right));
a0d0e21e
LW
2629 RETURN;
2630 }
79072805
LW
2631}
2632
a0d0e21e 2633PP(pp_i_ne)
79072805 2634{
20b7effb 2635 dSP;
6f1401dc 2636 tryAMAGICbin_MG(ne_amg, AMGf_set);
a0d0e21e 2637 {
96b6b87f 2638 dPOPTOPiirl_nomg;
54310121 2639 SETs(boolSV(left != right));
a0d0e21e
LW
2640 RETURN;
2641 }
79072805
LW
2642}
2643
a0d0e21e 2644PP(pp_i_ncmp)
79072805 2645{
20b7effb 2646 dSP; dTARGET;
6f1401dc 2647 tryAMAGICbin_MG(ncmp_amg, 0);
a0d0e21e 2648 {
96b6b87f 2649 dPOPTOPiirl_nomg;
a0d0e21e 2650 I32 value;
79072805 2651
a0d0e21e 2652 if (left > right)
79072805 2653 value = 1;
a0d0e21e 2654 else if (left < right)
79072805 2655 value = -1;
a0d0e21e 2656 else
79072805 2657 value = 0;
a0d0e21e
LW
2658 SETi(value);
2659 RETURN;
79072805 2660 }
85e6fe83
LW
2661}
2662
2663PP(pp_i_negate)
2664{
20b7effb 2665 dSP; dTARGET;
6f1401dc 2666 tryAMAGICun_MG(neg_amg, 0);
1c2b3fd6 2667 if (S_negate_string(aTHX)) return NORMAL;
6f1401dc
DM
2668 {
2669 SV * const sv = TOPs;
2670 IV const i = SvIV_nomg(sv);
2671 SETi(-i);
ae642386 2672 return NORMAL;
6f1401dc 2673 }
85e6fe83
LW
2674}
2675
79072805
LW
2676/* High falutin' math. */
2677
2678PP(pp_atan2)
2679{
20b7effb 2680 dSP; dTARGET;
6f1401dc 2681 tryAMAGICbin_MG(atan2_amg, 0);
a0d0e21e 2682 {
096c060c 2683 dPOPTOPnnrl_nomg;
a1021d57 2684 SETn(Perl_atan2(left, right));
a0d0e21e
LW
2685 RETURN;
2686 }
79072805
LW
2687}
2688
b1c05ba5
DM
2689
2690/* also used for: pp_cos() pp_exp() pp_log() pp_sqrt() */
2691
79072805
LW
2692PP(pp_sin)
2693{
20b7effb 2694 dSP; dTARGET;
af71714e 2695 int amg_type = fallback_amg;
71302fe3 2696 const char *neg_report = NULL;
71302fe3
NC
2697 const int op_type = PL_op->op_type;
2698
2699 switch (op_type) {
af71714e
JH
2700 case OP_SIN: amg_type = sin_amg; break;
2701 case OP_COS: amg_type = cos_amg; break;
2702 case OP_EXP: amg_type = exp_amg; break;
2703 case OP_LOG: amg_type = log_amg; neg_report = "log"; break;
2704 case OP_SQRT: amg_type = sqrt_amg; neg_report = "sqrt"; break;
a0d0e21e 2705 }
79072805 2706
af71714e 2707 assert(amg_type != fallback_amg);
6f1401dc
DM
2708
2709 tryAMAGICun_MG(amg_type, 0);
a0d0e21e 2710 {
8c78ed36 2711 SV * const arg = TOPs;
6f1401dc 2712 const NV value = SvNV_nomg(arg);
f256868e 2713 NV result = NV_NAN;
af71714e 2714 if (neg_report) { /* log or sqrt */
a3463d96
DD
2715 if (
2716#if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
2717 ! Perl_isnan(value) &&
2718#endif
2719 (op_type == OP_LOG ? (value <= 0.0) : (value < 0.0))) {
71302fe3 2720 SET_NUMERIC_STANDARD();
dcbac5bb 2721 /* diag_listed_as: Can't take log of %g */
71302fe3
NC
2722 DIE(aTHX_ "Can't take %s of %"NVgf, neg_report, value);
2723 }
2724 }
af71714e 2725 switch (op_type) {
f256868e 2726 default:
af71714e
JH
2727 case OP_SIN: result = Perl_sin(value); break;
2728 case OP_COS: result = Perl_cos(value); break;
2729 case OP_EXP: result = Perl_exp(value); break;
2730 case OP_LOG: result = Perl_log(value); break;
2731 case OP_SQRT: result = Perl_sqrt(value); break;
2732 }
8c78ed36
FC
2733 SETn(result);
2734 return NORMAL;
a0d0e21e 2735 }
79072805
LW
2736}
2737
56cb0a1c
AD
2738/* Support Configure command-line overrides for rand() functions.
2739 After 5.005, perhaps we should replace this by Configure support
2740 for drand48(), random(), or rand(). For 5.005, though, maintain
2741 compatibility by calling rand() but allow the user to override it.
2742 See INSTALL for details. --Andy Dougherty 15 July 1998
2743*/
85ab1d1d
JH
2744/* Now it's after 5.005, and Configure supports drand48() and random(),
2745 in addition to rand(). So the overrides should not be needed any more.
2746 --Jarkko Hietaniemi 27 September 1998
2747 */
2748
79072805
LW
2749PP(pp_rand)
2750{
80252599 2751 if (!PL_srand_called) {
85ab1d1d 2752 (void)seedDrand01((Rand_seed_t)seed());
80252599 2753 PL_srand_called = TRUE;
93dc8474 2754 }
fdf4dddd
DD
2755 {
2756 dSP;
2757 NV value;
fdf4dddd
DD
2758
2759 if (MAXARG < 1)
7e9044f9
FC
2760 {
2761 EXTEND(SP, 1);
fdf4dddd 2762 value = 1.0;
7e9044f9 2763 }
fdf4dddd
DD
2764 else {
2765 SV * const sv = POPs;
2766 if(!sv)
2767 value = 1.0;
2768 else
2769 value = SvNV(sv);
2770 }
2771 /* 1 of 2 things can be carried through SvNV, SP or TARG, SP was carried */
a3463d96
DD
2772#if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
2773 if (! Perl_isnan(value) && value == 0.0)
2774#else
659c4b96 2775 if (value == 0.0)
a3463d96 2776#endif
fdf4dddd
DD
2777 value = 1.0;
2778 {
2779 dTARGET;
2780 PUSHs(TARG);
2781 PUTBACK;
2782 value *= Drand01();
2783 sv_setnv_mg(TARG, value);
2784 }
2785 }
2786 return NORMAL;
79072805
LW
2787}
2788
2789PP(pp_srand)
2790{
20b7effb 2791 dSP; dTARGET;
f914a682
JL
2792 UV anum;
2793
0a5f3363 2794 if (MAXARG >= 1 && (TOPs || POPs)) {
f914a682
JL
2795 SV *top;
2796 char *pv;
2797 STRLEN len;
2798 int flags;
2799
2800 top = POPs;
2801 pv = SvPV(top, len);
2802 flags = grok_number(pv, len, &anum);
2803
2804 if (!(flags & IS_NUMBER_IN_UV)) {
2805 Perl_ck_warner_d(aTHX_ packWARN(WARN_OVERFLOW),
2806 "Integer overflow in srand");
2807 anum = UV_MAX;
2808 }
2809 }
2810 else {
2811 anum = seed();
2812 }
2813
85ab1d1d 2814 (void)seedDrand01((Rand_seed_t)anum);
80252599 2815 PL_srand_called = TRUE;
da1010ec
NC
2816 if (anum)
2817 XPUSHu(anum);
2818 else {
2819 /* Historically srand always returned true. We can avoid breaking
2820 that like this: */
2821 sv_setpvs(TARG, "0 but true");
2822 XPUSHTARG;
2823 }
83832992 2824 RETURN;
79072805
LW
2825}
2826
79072805
LW
2827PP(pp_int)
2828{
20b7effb 2829 dSP; dTARGET;
6f1401dc 2830 tryAMAGICun_MG(int_amg, AMGf_numeric);
774d564b 2831 {
6f1401dc
DM
2832 SV * const sv = TOPs;
2833 const IV iv = SvIV_nomg(sv);
28e5dec8
JH
2834 /* XXX it's arguable that compiler casting to IV might be subtly
2835 different from modf (for numbers inside (IV_MIN,UV_MAX)) in which
2836 else preferring IV has introduced a subtle behaviour change bug. OTOH
2837 relying on floating point to be accurate is a bug. */
2838
c781a409 2839 if (!SvOK(sv)) {
922c4365 2840 SETu(0);
c781a409
RD
2841 }
2842 else if (SvIOK(sv)) {
2843 if (SvIsUV(sv))
6f1401dc 2844 SETu(SvUV_nomg(sv));
c781a409 2845 else
28e5dec8 2846 SETi(iv);
c781a409 2847 }
c781a409 2848 else {
6f1401dc 2849 const NV value = SvNV_nomg(sv);
b9d05018
FC
2850 if (UNLIKELY(Perl_isinfnan(value)))
2851 SETn(value);
5bf8b78e 2852 else if (value >= 0.0) {
28e5dec8
JH
2853 if (value < (NV)UV_MAX + 0.5) {
2854 SETu(U_V(value));
2855 } else {
059a1014 2856 SETn(Perl_floor(value));
28e5dec8 2857 }
1048ea30 2858 }
28e5dec8
JH
2859 else {
2860 if (value > (NV)IV_MIN - 0.5) {
2861 SETi(I_V(value));
2862 } else {
1bbae031 2863 SETn(Perl_ceil(value));
28e5dec8
JH
2864 }
2865 }
774d564b 2866 }
79072805 2867 }
699e9491 2868 return NORMAL;
79072805
LW
2869}
2870
463ee0b2
LW
2871PP(pp_abs)
2872{
20b7effb 2873 dSP; dTARGET;
6f1401dc 2874 tryAMAGICun_MG(abs_amg, AMGf_numeric);
a0d0e21e 2875 {
6f1401dc 2876 SV * const sv = TOPs;
28e5dec8 2877 /* This will cache the NV value if string isn't actually integer */
6f1401dc 2878 const IV iv = SvIV_nomg(sv);
a227d84d 2879
800401ee 2880 if (!SvOK(sv)) {
922c4365 2881 SETu(0);
800401ee
JH
2882 }
2883 else if (SvIOK(sv)) {
28e5dec8 2884 /* IVX is precise */
800401ee 2885 if (SvIsUV(sv)) {
6f1401dc 2886 SETu(SvUV_nomg(sv)); /* force it to be numeric only */
28e5dec8
JH
2887 } else {
2888 if (iv >= 0) {
2889 SETi(iv);
2890 } else {
2891 if (iv != IV_MIN) {
2892 SETi(-iv);
2893 } else {
2894 /* 2s complement assumption. Also, not really needed as
2895 IV_MIN and -IV_MIN should both be %100...00 and NV-able */
2896 SETu(IV_MIN);
2897 }
a227d84d 2898 }
28e5dec8
JH
2899 }
2900 } else{
6f1401dc 2901 const NV value = SvNV_nomg(sv);
774d564b 2902 if (value < 0.0)
1b6737cc 2903 SETn(-value);
a4474c9e
DD
2904 else
2905 SETn(value);
774d564b 2906 }
a0d0e21e 2907 }
067b7929 2908 return NORMAL;
463ee0b2
LW
2909}
2910
b1c05ba5
DM
2911
2912/* also used for: pp_hex() */
2913
79072805
LW
2914PP(pp_oct)
2915{
20b7effb 2916 dSP; dTARGET;
5c144d81 2917 const char *tmps;
53305cf1 2918 I32 flags = PERL_SCAN_ALLOW_UNDERSCORES;
6f894ead 2919 STRLEN len;
53305cf1
NC
2920 NV result_nv;
2921 UV result_uv;
4e51bcca 2922 SV* const sv = TOPs;
79072805 2923
349d4f2f 2924 tmps = (SvPV_const(sv, len));
2bc69dc4
NIS
2925 if (DO_UTF8(sv)) {
2926 /* If Unicode, try to downgrade
2927 * If not possible, croak. */
1b6737cc 2928 SV* const tsv = sv_2mortal(newSVsv(sv));
2bc69dc4
NIS
2929
2930 SvUTF8_on(tsv);
2931 sv_utf8_downgrade(tsv, FALSE);
349d4f2f 2932 tmps = SvPV_const(tsv, len);
2bc69dc4 2933 }
daa2adfd
NC
2934 if (PL_op->op_type == OP_HEX)
2935 goto hex;
2936
6f894ead 2937 while (*tmps && len && isSPACE(*tmps))
53305cf1 2938 tmps++, len--;
9e24b6e2 2939 if (*tmps == '0')
53305cf1 2940 tmps++, len--;
305b8651 2941 if (isALPHA_FOLD_EQ(*tmps, 'x')) {
daa2adfd 2942 hex:
53305cf1 2943 result_uv = grok_hex (tmps, &len, &flags, &result_nv);
daa2adfd 2944 }
305b8651 2945 else if (isALPHA_FOLD_EQ(*tmps, 'b'))
53305cf1 2946 result_uv = grok_bin (tmps, &len, &flags, &result_nv);
464e2e8a 2947 else
53305cf1
NC
2948 result_uv = grok_oct (tmps, &len, &flags, &result_nv);
2949
2950 if (flags & PERL_SCAN_GREATER_THAN_UV_MAX) {
4e51bcca 2951 SETn(result_nv);
53305cf1
NC
2952 }
2953 else {
4e51bcca 2954 SETu(result_uv);
53305cf1 2955 }
4e51bcca 2956 return NORMAL;
79072805
LW
2957}
2958
2959/* String stuff. */
2960
2961PP(pp_length)
2962{
20b7effb 2963 dSP; dTARGET;
0bd48802 2964 SV * const sv = TOPs;
a0ed51b3 2965
7776003e
DD
2966 U32 in_bytes = IN_BYTES;
2967 /* simplest case shortcut */
2968 /* turn off SVf_UTF8 in tmp flags if HINT_BYTES on*/
2969 U32 svflags = (SvFLAGS(sv) ^ (in_bytes << 26)) & (SVf_POK|SVs_GMG|SVf_UTF8);
6d59e610 2970 STATIC_ASSERT_STMT(HINT_BYTES == 0x00000008 && SVf_UTF8 == 0x20000000 && (SVf_UTF8 == HINT_BYTES << 26));
7776003e
DD
2971 SETs(TARG);
2972
2973 if(LIKELY(svflags == SVf_POK))
2974 goto simple_pv;
2975 if(svflags & SVs_GMG)
2976 mg_get(sv);
0f43fd57 2977 if (SvOK(sv)) {
7776003e
DD
2978 if (!IN_BYTES) /* reread to avoid using an C auto/register */
2979 sv_setiv(TARG, (IV)sv_len_utf8_nomg(sv));
9f621bb0 2980 else
0f43fd57
FC
2981 {
2982 STRLEN len;
7776003e
DD
2983 /* unrolled SvPV_nomg_const(sv,len) */
2984 if(SvPOK_nog(sv)){
2985 simple_pv:
2986 len = SvCUR(sv);
2987 } else {
2988 (void)sv_2pv_flags(sv, &len, 0|SV_CONST_RETURN);
2989 }
2990 sv_setiv(TARG, (IV)(len));
0f43fd57 2991 }
656266fc 2992 } else {
9407f9c1
DL
2993 if (!SvPADTMP(TARG)) {
2994 sv_setsv_nomg(TARG, &PL_sv_undef);
7776003e
DD
2995 } else { /* TARG is on stack at this point and is overwriten by SETs.
2996 This branch is the odd one out, so put TARG by default on
2997 stack earlier to let local SP go out of liveness sooner */
2998 SETs(&PL_sv_undef);
2999 goto no_set_magic;
3000 }
92331800 3001 }
7776003e
DD
3002 SvSETMAGIC(TARG);
3003 no_set_magic:
3004 return NORMAL; /* no putback, SP didn't move in this opcode */
79072805
LW
3005}
3006
83f78d1a
FC
3007/* Returns false if substring is completely outside original string.
3008 No length is indicated by len_iv = 0 and len_is_uv = 0. len_is_uv must
3009 always be true for an explicit 0.
3010*/
3011bool
ddeaf645
DD
3012Perl_translate_substr_offsets( STRLEN curlen, IV pos1_iv,
3013 bool pos1_is_uv, IV len_iv,
3014 bool len_is_uv, STRLEN *posp,
3015 STRLEN *lenp)
83f78d1a
FC
3016{
3017 IV pos2_iv;
3018 int pos2_is_uv;
3019
3020 PERL_ARGS_ASSERT_TRANSLATE_SUBSTR_OFFSETS;
3021
3022 if (!pos1_is_uv && pos1_iv < 0 && curlen) {
3023 pos1_is_uv = curlen-1 > ~(UV)pos1_iv;
3024 pos1_iv += curlen;
3025 }
3026 if ((pos1_is_uv || pos1_iv > 0) && (UV)pos1_iv > curlen)
3027 return FALSE;
3028
3029 if (len_iv || len_is_uv) {
3030 if (!len_is_uv && len_iv < 0) {
3031 pos2_iv = curlen + len_iv;
3032 if (curlen)
3033 pos2_is_uv = curlen-1 > ~(UV)len_iv;
3034 else
3035 pos2_is_uv = 0;
3036 } else { /* len_iv >= 0 */
3037 if (!pos1_is_uv && pos1_iv < 0) {
3038 pos2_iv = pos1_iv + len_iv;
3039 pos2_is_uv = (UV)len_iv > (UV)IV_MAX;
3040 } else {
3041 if ((UV)len_iv > curlen-(UV)pos1_iv)
3042 pos2_iv = curlen;
3043 else
3044 pos2_iv = pos1_iv+len_iv;
3045 pos2_is_uv = 1;
3046 }
3047 }
3048 }
3049 else {
3050 pos2_iv = curlen;
3051 pos2_is_uv = 1;
3052 }
3053
3054 if (!pos2_is_uv && pos2_iv < 0) {
3055 if (!pos1_is_uv && pos1_iv < 0)
3056 return FALSE;
3057 pos2_iv = 0;
3058 }
3059 else if (!pos1_is_uv && pos1_iv < 0)
3060 pos1_iv = 0;
3061
3062 if ((UV)pos2_iv < (UV)pos1_iv)
3063 pos2_iv = pos1_iv;
3064 if ((UV)pos2_iv > curlen)
3065 pos2_iv = curlen;
3066
3067 /* pos1_iv and pos2_iv both in 0..curlen, so the cast is safe */
3068 *posp = (STRLEN)( (UV)pos1_iv );
3069 *lenp = (STRLEN)( (UV)pos2_iv - (UV)pos1_iv );
3070
3071 return TRUE;
3072}
3073
79072805
LW
3074PP(pp_substr)
3075{
20b7effb 3076 dSP; dTARGET;
79072805 3077 SV *sv;
463ee0b2 3078 STRLEN curlen;
9402d6ed 3079 STRLEN utf8_curlen;
777f7c56
EB
3080 SV * pos_sv;
3081 IV pos1_iv;
3082 int pos1_is_uv;
777f7c56
EB
3083 SV * len_sv;
3084 IV len_iv = 0;
83f78d1a 3085 int len_is_uv = 0;
24fcb59f 3086 I32 lvalue = PL_op->op_flags & OPf_MOD || LVRET;
bbddc9e0 3087 const bool rvalue = (GIMME_V != G_VOID);
e1ec3a88 3088 const char *tmps;
9402d6ed 3089 SV *repl_sv = NULL;
cbbf8932 3090 const char *repl = NULL;
7b8d334a 3091 STRLEN repl_len;
7bc95ae1 3092 int num_args = PL_op->op_private & 7;
13e30c65 3093 bool repl_need_utf8_upgrade = FALSE;
79072805 3094
78f9721b
SM
3095 if (num_args > 2) {
3096 if (num_args > 3) {
24fcb59f 3097 if(!(repl_sv = POPs)) num_args--;
7bc95ae1
FC
3098 }
3099 if ((len_sv = POPs)) {
3100 len_iv = SvIV(len_sv);
83f78d1a 3101 len_is_uv = len_iv ? SvIOK_UV(len_sv) : 1;
7b8d334a 3102 }
7bc95ae1 3103 else num_args--;
5d82c453 3104 }
777f7c56
EB
3105 pos_sv = POPs;
3106 pos1_iv = SvIV(pos_sv);
3107 pos1_is_uv = SvIOK_UV(pos_sv);
79072805 3108 sv = POPs;
24fcb59f
FC
3109 if (PL_op->op_private & OPpSUBSTR_REPL_FIRST) {
3110 assert(!repl_sv);
3111 repl_sv = POPs;
3112 }
6582db62 3113 if (lvalue && !repl_sv) {
83f78d1a
FC
3114 SV * ret;
3115 ret = sv_2mortal(newSV_type(SVt_PVLV)); /* Not TARG RT#67838 */
3116 sv_magic(ret, NULL, PERL_MAGIC_substr, NULL, 0);
3117 LvTYPE(ret) = 'x';
3118 LvTARG(ret) = SvREFCNT_inc_simple(sv);
3119 LvTARGOFF(ret) =
3120 pos1_is_uv || pos1_iv >= 0
3121 ? (STRLEN)(UV)pos1_iv
3122 : (LvFLAGS(ret) |= 1, (STRLEN)(UV)-pos1_iv);
3123 LvTARGLEN(ret) =
3124 len_is_uv || len_iv > 0
3125 ? (STRLEN)(UV)len_iv
3126 : (LvFLAGS(ret) |= 2, (STRLEN)(UV)-len_iv);
3127
83f78d1a
FC
3128 PUSHs(ret); /* avoid SvSETMAGIC here */
3129 RETURN;
a74fb2cd 3130 }
6582db62
FC
3131 if (repl_sv) {
3132 repl = SvPV_const(repl_sv, repl_len);
3133 SvGETMAGIC(sv);
3134 if (SvROK(sv))
3135 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR),
3136 "Attempt to use reference as lvalue in substr"
3137 );
3138 tmps = SvPV_force_nomg(sv, curlen);
3139 if (DO_UTF8(repl_sv) && repl_len) {
3140 if (!DO_UTF8(sv)) {
01680ee9 3141 sv_utf8_upgrade_nomg(sv);
6582db62
FC
3142 curlen = SvCUR(sv);
3143 }
3144 }
3145 else if (DO_UTF8(sv))
3146 repl_need_utf8_upgrade = TRUE;
3147 }
3148 else tmps = SvPV_const(sv, curlen);
7e2040f0 3149 if (DO_UTF8(sv)) {
0d788f38 3150 utf8_curlen = sv_or_pv_len_utf8(sv, tmps, curlen);
9402d6ed
JH
3151 if (utf8_curlen == curlen)
3152 utf8_curlen = 0;
a0ed51b3 3153 else
9402d6ed 3154 curlen = utf8_curlen;
a0ed51b3 3155 }
d1c2b58a 3156 else
9402d6ed 3157 utf8_curlen = 0;
a0ed51b3 3158
83f78d1a
FC
3159 {
3160 STRLEN pos, len, byte_len, byte_pos;
777f7c56 3161
83f78d1a
FC
3162 if (!translate_substr_offsets(
3163 curlen, pos1_iv, pos1_is_uv, len_iv, len_is_uv, &pos, &len
3164 )) goto bound_fail;
777f7c56 3165
83f78d1a
FC
3166 byte_len = len;
3167 byte_pos = utf8_curlen
0d788f38 3168 ? sv_or_pv_pos_u2b(sv, tmps, pos, &byte_len) : pos;
d931b1be 3169
2154eca7 3170 tmps += byte_pos;
bbddc9e0
CS
3171
3172 if (rvalue) {
3173 SvTAINTED_off(TARG); /* decontaminate */
3174 SvUTF8_off(TARG); /* decontaminate */
3175 sv_setpvn(TARG, tmps, byte_len);
12aa1545 3176#ifdef USE_LOCALE_COLLATE
bbddc9e0 3177 sv_unmagic(TARG, PERL_MAGIC_collxfrm);
12aa1545 3178#endif
bbddc9e0
CS
3179 if (utf8_curlen)
3180 SvUTF8_on(TARG);
3181 }
2154eca7 3182
f7928d6c 3183 if (repl) {
13e30c65
JH
3184 SV* repl_sv_copy = NULL;
3185
3186 if (repl_need_utf8_upgrade) {
3187 repl_sv_copy = newSVsv(repl_sv);
3188 sv_utf8_upgrade(repl_sv_copy);
349d4f2f 3189 repl = SvPV_const(repl_sv_copy, repl_len);
13e30c65 3190 }
502d9230
VP
3191 if (!SvOK(sv))
3192 sv_setpvs(sv, "");
777f7c56 3193 sv_insert_flags(sv, byte_pos, byte_len, repl, repl_len, 0);
ef8d46e8 3194 SvREFCNT_dec(repl_sv_copy);
f7928d6c 3195 }
79072805 3196 }
6a9665b0
FC
3197 if (PL_op->op_private & OPpSUBSTR_REPL_FIRST)
3198 SP++;
3199 else if (rvalue) {
bbddc9e0
CS
3200 SvSETMAGIC(TARG);
3201 PUSHs(TARG);
3202 }
79072805 3203 RETURN;
777f7c56 3204
1c900557 3205bound_fail:
83f78d1a 3206 if (repl)
777f7c56
EB
3207 Perl_croak(aTHX_ "substr outside of string");
3208 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string");
3209 RETPUSHUNDEF;
79072805
LW
3210}
3211
3212PP(pp_vec)
3213{
20b7effb 3214 dSP;
eb578fdb
KW
3215 const IV size = POPi;
3216 const IV offset = POPi;
3217 SV * const src = POPs;
1b6737cc 3218 const I32 lvalue = PL_op->op_flags & OPf_MOD || LVRET;
2154eca7 3219 SV * ret;
a0d0e21e 3220
81e118e0 3221 if (lvalue) { /* it's an lvalue! */
2154eca7
EB
3222 ret = sv_2mortal(newSV_type(SVt_PVLV)); /* Not TARG RT#67838 */
3223 sv_magic(ret, NULL, PERL_MAGIC_vec, NULL, 0);
3224 LvTYPE(ret) = 'v';
3225 LvTARG(ret) = SvREFCNT_inc_simple(src);
3226 LvTARGOFF(ret) = offset;
3227 LvTARGLEN(ret) = size;
3228 }
3229 else {
3230 dTARGET;
3231 SvTAINTED_off(TARG); /* decontaminate */
3232 ret = TARG;
79072805
LW
3233 }
3234
2154eca7 3235 sv_setuv(ret, do_vecget(src, offset, size));
f9e95907
FC
3236 if (!lvalue)
3237 SvSETMAGIC(ret);
2154eca7 3238 PUSHs(ret);
79072805
LW
3239 RETURN;
3240}
3241
b1c05ba5
DM
3242
3243/* also used for: pp_rindex() */
3244
79072805
LW
3245PP(pp_index)
3246{
20b7effb 3247 dSP; dTARGET;
79072805
LW
3248 SV *big;
3249 SV *little;
c445ea15 3250 SV *temp = NULL;
ad66a58c 3251 STRLEN biglen;
2723d216 3252 STRLEN llen = 0;
b464e2b7
TC
3253 SSize_t offset = 0;
3254 SSize_t retval;
73ee8be2
NC
3255 const char *big_p;
3256 const char *little_p;
2f040f7f
NC
3257 bool big_utf8;
3258 bool little_utf8;
2723d216 3259 const bool is_index = PL_op->op_type == OP_INDEX;
d3e26383 3260 const bool threeargs = MAXARG >= 3 && (TOPs || ((void)POPs,0));
79072805 3261
e1dccc0d
Z
3262 if (threeargs)
3263 offset = POPi;
79072805
LW
3264 little = POPs;
3265 big = POPs;
73ee8be2
NC
3266 big_p = SvPV_const(big, biglen);
3267 little_p = SvPV_const(little, llen);
3268
e609e586
NC
3269 big_utf8 = DO_UTF8(big);
3270 little_utf8 = DO_UTF8(little);
3271 if (big_utf8 ^ little_utf8) {
3272 /* One needs to be upgraded. */
47e13f24 3273 if (little_utf8 && !IN_ENCODING) {
2f040f7f
NC
3274 /* Well, maybe instead we might be able to downgrade the small
3275 string? */
1eced8f8 3276 char * const pv = (char*)bytes_from_utf8((U8 *)little_p, &llen,
2f040f7f
NC
3277 &little_utf8);
3278 if (little_utf8) {
3279 /* If the large string is ISO-8859-1, and it's not possible to
3280 convert the small string to ISO-8859-1, then there is no
3281 way that it could be found anywhere by index. */
3282 retval = -1;
3283 goto fail;
3284 }
e609e586 3285
2f040f7f
NC
3286 /* At this point, pv is a malloc()ed string. So donate it to temp
3287 to ensure it will get free()d */
3288 little = temp = newSV(0);
73ee8be2
NC
3289 sv_usepvn(temp, pv, llen);
3290 little_p = SvPVX(little);
e609e586 3291 } else {
73ee8be2
NC
3292 temp = little_utf8
3293 ? newSVpvn(big_p, biglen) : newSVpvn(little_p, llen);
2f040f7f 3294
47e13f24 3295 if (IN_ENCODING) {
ad2de1b2 3296 sv_recode_to_utf8(temp, _get_encoding());
2f040f7f
NC
3297 } else {
3298 sv_utf8_upgrade(temp);
3299 }
3300 if (little_utf8) {
3301 big = temp;
3302 big_utf8 = TRUE;
73ee8be2 3303 big_p = SvPV_const(big, biglen);
2f040f7f
NC
3304 } else {
3305 little = temp;
73ee8be2 3306 little_p = SvPV_const(little, llen);
2f040f7f 3307 }
e609e586
NC
3308 }
3309 }
73ee8be2
NC
3310 if (SvGAMAGIC(big)) {
3311 /* Life just becomes a lot easier if I use a temporary here.
3312 Otherwise I need to avoid calls to sv_pos_u2b(), which (dangerously)
3313 will trigger magic and overloading again, as will fbm_instr()
3314 */
59cd0e26
NC
3315 big = newSVpvn_flags(big_p, biglen,
3316 SVs_TEMP | (big_utf8 ? SVf_UTF8 : 0));
73ee8be2
NC
3317 big_p = SvPVX(big);
3318 }
e4e44778 3319 if (SvGAMAGIC(little) || (is_index && !SvOK(little))) {
73ee8be2
NC
3320 /* index && SvOK() is a hack. fbm_instr() calls SvPV_const, which will
3321 warn on undef, and we've already triggered a warning with the
3322 SvPV_const some lines above. We can't remove that, as we need to
3323 call some SvPV to trigger overloading early and find out if the
3324 string is UTF-8.
3325 This is all getting to messy. The API isn't quite clean enough,
3326 because data access has side effects.
3327 */
59cd0e26
NC
3328 little = newSVpvn_flags(little_p, llen,
3329 SVs_TEMP | (little_utf8 ? SVf_UTF8 : 0));
73ee8be2
NC
3330 little_p = SvPVX(little);
3331 }
e609e586 3332
d3e26383 3333 if (!threeargs)
2723d216 3334 offset = is_index ? 0 : biglen;
a0ed51b3 3335 else {
ad66a58c 3336 if (big_utf8 && offset > 0)
b464e2b7 3337 offset = sv_pos_u2b_flags(big, offset, 0, SV_CONST_RETURN);
73ee8be2
NC
3338 if (!is_index)
3339 offset += llen;
a0ed51b3 3340 }
79072805
LW
3341 if (offset < 0)
3342 offset = 0;
b464e2b7 3343 else if (offset > (SSize_t)biglen)
ad66a58c 3344 offset = biglen;
73ee8be2
NC
3345 if (!(little_p = is_index
3346 ? fbm_instr((unsigned char*)big_p + offset,
3347 (unsigned char*)big_p + biglen, little, 0)
3348 : rninstr(big_p, big_p + offset,
3349 little_p, little_p + llen)))
a0ed51b3 3350 retval = -1;
ad66a58c 3351 else {
73ee8be2 3352 retval = little_p - big_p;
15c41403 3353 if (retval > 1 && big_utf8)
b464e2b7 3354 retval = sv_pos_b2u_flags(big, retval, SV_CONST_RETURN);
ad66a58c 3355 }
ef8d46e8 3356 SvREFCNT_dec(temp);
2723d216 3357 fail:
e1dccc0d 3358 PUSHi(retval);
79072805
LW
3359 RETURN;
3360}
3361
3362PP(pp_sprintf)
3363{
20b7effb 3364 dSP; dMARK; dORIGMARK; dTARGET;
3e6bd4bf 3365 SvTAINTED_off(TARG);
79072805 3366 do_sprintf(TARG, SP-MARK, MARK+1);
bbce6d69 3367 TAINT_IF(SvTAINTED(TARG));
79072805
LW
3368 SP = ORIGMARK;
3369 PUSHTARG;
3370 RETURN;
3371}
3372
79072805
LW
3373PP(pp_ord)
3374{
20b7effb 3375 dSP; dTARGET;
1eced8f8 3376
6ba92227 3377 SV *argsv = TOPs;
ba210ebe 3378 STRLEN len;
349d4f2f 3379 const U8 *s = (U8*)SvPV_const(argsv, len);
121910a4 3380
47e13f24 3381 if (IN_ENCODING && SvPOK(argsv) && !DO_UTF8(argsv)) {
1eced8f8 3382 SV * const tmpsv = sv_2mortal(newSVsv(argsv));
ad2de1b2 3383 s = (U8*)sv_recode_to_utf8(tmpsv, _get_encoding());
4f6386b6 3384 len = UTF8SKIP(s); /* Should be well-formed; so this is its length */
121910a4
JH
3385 argsv = tmpsv;
3386 }
79072805 3387
6ba92227 3388 SETu(DO_UTF8(argsv)
4f6386b6 3389 ? utf8n_to_uvchr(s, len, 0, UTF8_ALLOW_ANYUV)
f3943cf2 3390 : (UV)(*s));
68795e93 3391
6ba92227 3392 return NORMAL;
79072805
LW
3393}
3394
463ee0b2
LW
3395PP(pp_chr)
3396{
20b7effb 3397 dSP; dTARGET;
463ee0b2 3398 char *tmps;
8a064bd6 3399 UV value;
d3261b99 3400 SV *top = TOPs;
8a064bd6 3401
71739502 3402 SvGETMAGIC(top);
9911fc4e
FC
3403 if (UNLIKELY(SvAMAGIC(top)))
3404 top = sv_2num(top);
99f450cc 3405 if (UNLIKELY(isinfnansv(top)))
0c7df902 3406 Perl_croak(aTHX_ "Cannot chr %"NVgf, SvNV(top));
1cd88304
JH
3407 else {
3408 if (!IN_BYTES /* under bytes, chr(-1) eq chr(0xff), etc. */
3409 && ((SvIOKp(top) && !SvIsUV(top) && SvIV_nomg(top) < 0)
3410 ||
3411 ((SvNOKp(top) || (SvOK(top) && !SvIsUV(top)))
3412 && SvNV_nomg(top) < 0.0))) {
b3fe8680
FC
3413 if (ckWARN(WARN_UTF8)) {
3414 if (SvGMAGICAL(top)) {
3415 SV *top2 = sv_newmortal();
3416 sv_setsv_nomg(top2, top);
3417 top = top2;
3418 }
1cd88304
JH
3419 Perl_warner(aTHX_ packWARN(WARN_UTF8),
3420 "Invalid negative number (%"SVf") in chr", SVfARG(top));
3421 }
3422 value = UNICODE_REPLACEMENT;
3423 } else {
3424 value = SvUV_nomg(top);
3425 }
8a064bd6 3426 }
463ee0b2 3427
862a34c6 3428 SvUPGRADE(TARG,SVt_PV);
a0ed51b3 3429
0064a8a9 3430 if (value > 255 && !IN_BYTES) {
eb160463 3431 SvGROW(TARG, (STRLEN)UNISKIP(value)+1);
62961d2e 3432 tmps = (char*)uvchr_to_utf8_flags((U8*)SvPVX(TARG), value, 0);
349d4f2f 3433 SvCUR_set(TARG, tmps - SvPVX_const(TARG));
a0ed51b3
LW
3434 *tmps = '\0';
3435 (void)SvPOK_only(TARG);
aa6ffa16 3436 SvUTF8_on(TARG);
d3261b99
FC
3437 SETTARG;
3438 return NORMAL;
a0ed51b3
LW
3439 }
3440
748a9306 3441 SvGROW(TARG,2);
463ee0b2
LW
3442 SvCUR_set(TARG, 1);
3443 tmps = SvPVX(TARG);
eb160463 3444 *tmps++ = (char)value;
748a9306 3445 *tmps = '\0';
a0d0e21e 3446 (void)SvPOK_only(TARG);
4c5ed6e2 3447
47e13f24 3448 if (IN_ENCODING && !IN_BYTES) {
ad2de1b2 3449 sv_recode_to_utf8(TARG, _get_encoding());
88632417 3450 tmps = SvPVX(TARG);
28936164
KW
3451 if (SvCUR(TARG) == 0
3452 || ! is_utf8_string((U8*)tmps, SvCUR(TARG))
3453 || UTF8_IS_REPLACEMENT((U8*) tmps, (U8*) tmps + SvCUR(TARG)))
3454 {
4c5ed6e2 3455 SvGROW(TARG, 2);
d5a15ac2 3456 tmps = SvPVX(TARG);
4c5ed6e2
ST
3457 SvCUR_set(TARG, 1);
3458 *tmps++ = (char)value;
88632417 3459 *tmps = '\0';
4c5ed6e2 3460 SvUTF8_off(TARG);
88632417
JH
3461 }
3462 }
4c5ed6e2 3463
d3261b99
FC
3464 SETTARG;
3465 return NORMAL;
463ee0b2
LW
3466}
3467
79072805
LW
3468PP(pp_crypt)
3469{
79072805 3470#ifdef HAS_CRYPT
20b7effb 3471 dSP; dTARGET;
5f74f29c 3472 dPOPTOPssrl;
85c16d83 3473 STRLEN len;
10516c54 3474 const char *tmps = SvPV_const(left, len);
2bc69dc4 3475
85c16d83 3476 if (DO_UTF8(left)) {
2bc69dc4 3477 /* If Unicode, try to downgrade.
f2791508
JH
3478 * If not possible, croak.
3479 * Yes, we made this up. */
659fbb76 3480 SV* const tsv = newSVpvn_flags(tmps, len, SVf_UTF8|SVs_TEMP);
2bc69dc4 3481
2bc69dc4 3482 sv_utf8_downgrade(tsv, FALSE);
349d4f2f 3483 tmps = SvPV_const(tsv, len);
85c16d83 3484 }
05404ffe
JH
3485# ifdef USE_ITHREADS
3486# ifdef HAS_CRYPT_R
3487 if (!PL_reentrant_buffer->_crypt_struct_buffer) {
3488 /* This should be threadsafe because in ithreads there is only
3489 * one thread per interpreter. If this would not be true,
3490 * we would need a mutex to protect this malloc. */
3491 PL_reentrant_buffer->_crypt_struct_buffer =
3492 (struct crypt_data *)safemalloc(sizeof(struct crypt_data));
3493#if defined(__GLIBC__) || defined(__EMX__)
3494 if (PL_reentrant_buffer->_crypt_struct_buffer) {
3495 PL_reentrant_buffer->_crypt_struct_buffer->initialized = 0;
3496 /* work around glibc-2.2.5 bug */
3497 PL_reentrant_buffer->_crypt_struct_buffer->current_saltbits = 0;
3498 }
05404ffe 3499#endif
6ab58e4d 3500 }
05404ffe
JH
3501# endif /* HAS_CRYPT_R */
3502# endif /* USE_ITHREADS */
5f74f29c 3503# ifdef FCRYPT
83003860 3504 sv_setpv(TARG, fcrypt(tmps, SvPV_nolen_const(right)));
5f74f29c 3505# else
83003860 3506 sv_setpv(TARG, PerlProc_crypt(tmps, SvPV_nolen_const(right)));
5f74f29c 3507# endif
fbc76eb3 3508 SvUTF8_off(TARG);
ec93b65f 3509 SETTARG;
4808266b 3510 RETURN;
79072805 3511#else
b13b2135 3512 DIE(aTHX_
79072805
LW
3513 "The crypt() function is unimplemented due to excessive paranoia.");
3514#endif
79072805
LW
3515}
3516
00f254e2
KW
3517/* Generally UTF-8 and UTF-EBCDIC are indistinguishable at this level. So
3518 * most comments below say UTF-8, when in fact they mean UTF-EBCDIC as well */
3519
b1c05ba5
DM
3520
3521/* also used for: pp_lcfirst() */
3522
79072805
LW
3523PP(pp_ucfirst)
3524{
00f254e2
KW
3525 /* Actually is both lcfirst() and ucfirst(). Only the first character
3526 * changes. This means that possibly we can change in-place, ie., just
3527 * take the source and change that one character and store it back, but not
3528 * if read-only etc, or if the length changes */
3529
39644a26 3530 dSP;
d54190f6 3531 SV *source = TOPs;
00f254e2 3532 STRLEN slen; /* slen is the byte length of the whole SV. */
d54190f6
NC
3533 STRLEN need;
3534 SV *dest;
00f254e2
KW
3535 bool inplace; /* ? Convert first char only, in-place */
3536 bool doing_utf8 = FALSE; /* ? using utf8 */
3537 bool convert_source_to_utf8 = FALSE; /* ? need to convert */
12e9c124