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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 1651 SV *sv;
02a7a248 1652 bool infnan = FALSE;
6f1401dc 1653
82334630 1654 if (GIMME_V == G_ARRAY && PL_op->op_private & OPpREPEAT_DOLIST) {
6f1401dc
DM
1655 /* TODO: think of some way of doing list-repeat overloading ??? */
1656 sv = POPs;
1657 SvGETMAGIC(sv);
1658 }
1659 else {
3a100dab
FC
1660 if (UNLIKELY(PL_op->op_private & OPpREPEAT_DOLIST)) {
1661 /* The parser saw this as a list repeat, and there
1662 are probably several items on the stack. But we're
1663 in scalar/void context, and there's no pp_list to save us
1664 now. So drop the rest of the items -- robin@kitsite.com
1665 */
1666 dMARK;
1667 if (MARK + 1 < SP) {
1668 MARK[1] = TOPm1s;
1669 MARK[2] = TOPs;
1670 }
1671 else {
1672 dTOPss;
1673 ASSUME(MARK + 1 == SP);
1674 XPUSHs(sv);
1675 MARK[1] = &PL_sv_undef;
1676 }
1677 SP = MARK + 2;
1678 }
6f1401dc
DM
1679 tryAMAGICbin_MG(repeat_amg, AMGf_assign);
1680 sv = POPs;
1681 }
1682
2b573ace
JH
1683 if (SvIOKp(sv)) {
1684 if (SvUOK(sv)) {
6f1401dc 1685 const UV uv = SvUV_nomg(sv);
2b573ace
JH
1686 if (uv > IV_MAX)
1687 count = IV_MAX; /* The best we can do? */
1688 else
1689 count = uv;
1690 } else {
b3211734 1691 count = SvIV_nomg(sv);
2b573ace
JH
1692 }
1693 }
1694 else if (SvNOKp(sv)) {
02a7a248
JH
1695 const NV nv = SvNV_nomg(sv);
1696 infnan = Perl_isinfnan(nv);
1697 if (UNLIKELY(infnan)) {
1698 count = 0;
1699 } else {
1700 if (nv < 0.0)
1701 count = -1; /* An arbitrary negative integer */
1702 else
1703 count = (IV)nv;
1704 }
2b573ace
JH
1705 }
1706 else
02a7a248 1707 count = SvIV_nomg(sv);
6f1401dc 1708
02a7a248
JH
1709 if (infnan) {
1710 Perl_ck_warner(aTHX_ packWARN(WARN_NUMERIC),
1711 "Non-finite repeat count does nothing");
1712 } else if (count < 0) {
b3211734
KW
1713 count = 0;
1714 Perl_ck_warner(aTHX_ packWARN(WARN_NUMERIC),
02a7a248 1715 "Negative repeat count does nothing");
b3211734
KW
1716 }
1717
82334630 1718 if (GIMME_V == G_ARRAY && PL_op->op_private & OPpREPEAT_DOLIST) {
a0d0e21e 1719 dMARK;
b3b27d01 1720 const Size_t items = SP - MARK;
da9e430b 1721 const U8 mod = PL_op->op_flags & OPf_MOD;
79072805 1722
a0d0e21e 1723 if (count > 1) {
b3b27d01
DM
1724 Size_t max;
1725
1726 if ( items > MEM_SIZE_MAX / (UV)count /* max would overflow */
1727 || items > (U32)I32_MAX / sizeof(SV *) /* repeatcpy would overflow */
1728 )
1729 Perl_croak(aTHX_ "%s","Out of memory during list extend");
1730 max = items * count;
1731 MEXTEND(MARK, max);
1732
a0d0e21e 1733 while (SP > MARK) {
60779a30
DM
1734 if (*SP) {
1735 if (mod && SvPADTMP(*SP)) {
da9e430b 1736 *SP = sv_mortalcopy(*SP);
60779a30 1737 }
976c8a39 1738 SvTEMP_off((*SP));
da9e430b 1739 }
a0d0e21e 1740 SP--;
79072805 1741 }
a0d0e21e
LW
1742 MARK++;
1743 repeatcpy((char*)(MARK + items), (char*)MARK,
ad64d0ec 1744 items * sizeof(const SV *), count - 1);
a0d0e21e 1745 SP += max;
79072805 1746 }
a0d0e21e
LW
1747 else if (count <= 0)
1748 SP -= items;
79072805 1749 }
a0d0e21e 1750 else { /* Note: mark already snarfed by pp_list */
0bd48802 1751 SV * const tmpstr = POPs;
a0d0e21e 1752 STRLEN len;
9b877dbb 1753 bool isutf;
a0d0e21e 1754
6f1401dc
DM
1755 if (TARG != tmpstr)
1756 sv_setsv_nomg(TARG, tmpstr);
1757 SvPV_force_nomg(TARG, len);
9b877dbb 1758 isutf = DO_UTF8(TARG);
8ebc5c01
PP
1759 if (count != 1) {
1760 if (count < 1)
1761 SvCUR_set(TARG, 0);
1762 else {
b3b27d01
DM
1763 STRLEN max;
1764
1765 if ( len > (MEM_SIZE_MAX-1) / (UV)count /* max would overflow */
1766 || len > (U32)I32_MAX /* repeatcpy would overflow */
1767 )
1768 Perl_croak(aTHX_ "%s",
1769 "Out of memory during string extend");
1770 max = (UV)count * len + 1;
1771 SvGROW(TARG, max);
1772
a0d0e21e 1773 repeatcpy(SvPVX(TARG) + len, SvPVX(TARG), len, count - 1);
b162af07 1774 SvCUR_set(TARG, SvCUR(TARG) * count);
7a4c00b4 1775 }
a0d0e21e 1776 *SvEND(TARG) = '\0';
a0d0e21e 1777 }
dfcb284a
GS
1778 if (isutf)
1779 (void)SvPOK_only_UTF8(TARG);
1780 else
1781 (void)SvPOK_only(TARG);
b80b6069 1782
a0d0e21e 1783 PUSHTARG;
79072805 1784 }
a0d0e21e
LW
1785 RETURN;
1786}
79072805 1787
a0d0e21e
LW
1788PP(pp_subtract)
1789{
20b7effb 1790 dSP; dATARGET; bool useleft; SV *svl, *svr;
6f1401dc
DM
1791 tryAMAGICbin_MG(subtr_amg, AMGf_assign|AMGf_numeric);
1792 svr = TOPs;
1793 svl = TOPm1s;
800401ee 1794 useleft = USE_LEFT(svl);
28e5dec8 1795#ifdef PERL_PRESERVE_IVUV
7dca457a
NC
1796 /* See comments in pp_add (in pp_hot.c) about Overflow, and how
1797 "bad things" happen if you rely on signed integers wrapping. */
01f91bf2 1798 if (SvIV_please_nomg(svr)) {
28e5dec8
JH
1799 /* Unless the left argument is integer in range we are going to have to
1800 use NV maths. Hence only attempt to coerce the right argument if
1801 we know the left is integer. */
eb578fdb 1802 UV auv = 0;
9c5ffd7c 1803 bool auvok = FALSE;
7dca457a
NC
1804 bool a_valid = 0;
1805
28e5dec8 1806 if (!useleft) {
7dca457a
NC
1807 auv = 0;
1808 a_valid = auvok = 1;
1809 /* left operand is undef, treat as zero. */
28e5dec8
JH
1810 } else {
1811 /* Left operand is defined, so is it IV? */
01f91bf2 1812 if (SvIV_please_nomg(svl)) {
800401ee
JH
1813 if ((auvok = SvUOK(svl)))
1814 auv = SvUVX(svl);
7dca457a 1815 else {
eb578fdb 1816 const IV aiv = SvIVX(svl);
7dca457a
NC
1817 if (aiv >= 0) {
1818 auv = aiv;
1819 auvok = 1; /* Now acting as a sign flag. */
1820 } else { /* 2s complement assumption for IV_MIN */
53e2bfb7 1821 auv = (aiv == IV_MIN) ? (UV)aiv : (UV)-aiv;
28e5dec8 1822 }
7dca457a
NC
1823 }
1824 a_valid = 1;
1825 }
1826 }
1827 if (a_valid) {
1828 bool result_good = 0;
1829 UV result;
eb578fdb 1830 UV buv;
800401ee 1831 bool buvok = SvUOK(svr);
9041c2e3 1832
7dca457a 1833 if (buvok)
800401ee 1834 buv = SvUVX(svr);
7dca457a 1835 else {
eb578fdb 1836 const IV biv = SvIVX(svr);
7dca457a
NC
1837 if (biv >= 0) {
1838 buv = biv;
1839 buvok = 1;
1840 } else
53e2bfb7 1841 buv = (biv == IV_MIN) ? (UV)biv : (UV)-biv;
7dca457a
NC
1842 }
1843 /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve,
602f51c4 1844 else "IV" now, independent of how it came in.
7dca457a
NC
1845 if a, b represents positive, A, B negative, a maps to -A etc
1846 a - b => (a - b)
1847 A - b => -(a + b)
1848 a - B => (a + b)
1849 A - B => -(a - b)
1850 all UV maths. negate result if A negative.
1851 subtract if signs same, add if signs differ. */
1852
1853 if (auvok ^ buvok) {
1854 /* Signs differ. */
1855 result = auv + buv;
1856 if (result >= auv)
1857 result_good = 1;
1858 } else {
1859 /* Signs same */
1860 if (auv >= buv) {
1861 result = auv - buv;
1862 /* Must get smaller */
1863 if (result <= auv)
1864 result_good = 1;
1865 } else {
1866 result = buv - auv;
1867 if (result <= buv) {
1868 /* result really should be -(auv-buv). as its negation
1869 of true value, need to swap our result flag */
1870 auvok = !auvok;
1871 result_good = 1;
28e5dec8 1872 }
28e5dec8
JH
1873 }
1874 }
7dca457a
NC
1875 if (result_good) {
1876 SP--;
1877 if (auvok)
1878 SETu( result );
1879 else {
1880 /* Negate result */
1881 if (result <= (UV)IV_MIN)
53e2bfb7
DM
1882 SETi(result == (UV)IV_MIN
1883 ? IV_MIN : -(IV)result);
7dca457a
NC
1884 else {
1885 /* result valid, but out of range for IV. */
1886 SETn( -(NV)result );
1887 }
1888 }
1889 RETURN;
1890 } /* Overflow, drop through to NVs. */
28e5dec8
JH
1891 }
1892 }
1893#endif
a0d0e21e 1894 {
6f1401dc 1895 NV value = SvNV_nomg(svr);
4efa5a16
RD
1896 (void)POPs;
1897
28e5dec8
JH
1898 if (!useleft) {
1899 /* left operand is undef, treat as zero - value */
1900 SETn(-value);
1901 RETURN;
1902 }
6f1401dc 1903 SETn( SvNV_nomg(svl) - value );
28e5dec8 1904 RETURN;
79072805 1905 }
a0d0e21e 1906}
79072805 1907
a0d0e21e
LW
1908PP(pp_left_shift)
1909{
20b7effb 1910 dSP; dATARGET; SV *svl, *svr;
a42d0242 1911 tryAMAGICbin_MG(lshift_amg, AMGf_assign|AMGf_numeric);
6f1401dc
DM
1912 svr = POPs;
1913 svl = TOPs;
a0d0e21e 1914 {
6f1401dc 1915 const IV shift = SvIV_nomg(svr);
d0ba1bd2 1916 if (PL_op->op_private & HINT_INTEGER) {
6f1401dc 1917 const IV i = SvIV_nomg(svl);
972b05a9 1918 SETi(i << shift);
d0ba1bd2
JH
1919 }
1920 else {
6f1401dc 1921 const UV u = SvUV_nomg(svl);
972b05a9 1922 SETu(u << shift);
d0ba1bd2 1923 }
55497cff 1924 RETURN;
79072805 1925 }
a0d0e21e 1926}
79072805 1927
a0d0e21e
LW
1928PP(pp_right_shift)
1929{
20b7effb 1930 dSP; dATARGET; SV *svl, *svr;
a42d0242 1931 tryAMAGICbin_MG(rshift_amg, AMGf_assign|AMGf_numeric);
6f1401dc
DM
1932 svr = POPs;
1933 svl = TOPs;
a0d0e21e 1934 {
6f1401dc 1935 const IV shift = SvIV_nomg(svr);
d0ba1bd2 1936 if (PL_op->op_private & HINT_INTEGER) {
6f1401dc 1937 const IV i = SvIV_nomg(svl);
972b05a9 1938 SETi(i >> shift);
d0ba1bd2
JH
1939 }
1940 else {
6f1401dc 1941 const UV u = SvUV_nomg(svl);
972b05a9 1942 SETu(u >> shift);
d0ba1bd2 1943 }
a0d0e21e 1944 RETURN;
93a17b20 1945 }
79072805
LW
1946}
1947
a0d0e21e 1948PP(pp_lt)
79072805 1949{
20b7effb 1950 dSP;
33efebe6
DM
1951 SV *left, *right;
1952
a42d0242 1953 tryAMAGICbin_MG(lt_amg, AMGf_set|AMGf_numeric);
33efebe6
DM
1954 right = POPs;
1955 left = TOPs;
1956 SETs(boolSV(
1957 (SvIOK_notUV(left) && SvIOK_notUV(right))
1958 ? (SvIVX(left) < SvIVX(right))
1959 : (do_ncmp(left, right) == -1)
1960 ));
1961 RETURN;
a0d0e21e 1962}
79072805 1963
a0d0e21e
LW
1964PP(pp_gt)
1965{
20b7effb 1966 dSP;
33efebe6 1967 SV *left, *right;
1b6737cc 1968
33efebe6
DM
1969 tryAMAGICbin_MG(gt_amg, AMGf_set|AMGf_numeric);
1970 right = POPs;
1971 left = TOPs;
1972 SETs(boolSV(
1973 (SvIOK_notUV(left) && SvIOK_notUV(right))
1974 ? (SvIVX(left) > SvIVX(right))
1975 : (do_ncmp(left, right) == 1)
1976 ));
1977 RETURN;
a0d0e21e
LW
1978}
1979
1980PP(pp_le)
1981{
20b7effb 1982 dSP;
33efebe6 1983 SV *left, *right;
1b6737cc 1984
33efebe6
DM
1985 tryAMAGICbin_MG(le_amg, AMGf_set|AMGf_numeric);
1986 right = POPs;
1987 left = TOPs;
1988 SETs(boolSV(
1989 (SvIOK_notUV(left) && SvIOK_notUV(right))
1990 ? (SvIVX(left) <= SvIVX(right))
1991 : (do_ncmp(left, right) <= 0)
1992 ));
1993 RETURN;
a0d0e21e
LW
1994}
1995
1996PP(pp_ge)
1997{
20b7effb 1998 dSP;
33efebe6
DM
1999 SV *left, *right;
2000
2001 tryAMAGICbin_MG(ge_amg, AMGf_set|AMGf_numeric);
2002 right = POPs;
2003 left = TOPs;
2004 SETs(boolSV(
2005 (SvIOK_notUV(left) && SvIOK_notUV(right))
2006 ? (SvIVX(left) >= SvIVX(right))
2007 : ( (do_ncmp(left, right) & 2) == 0)
2008 ));
2009 RETURN;
2010}
1b6737cc 2011
33efebe6
DM
2012PP(pp_ne)
2013{
20b7effb 2014 dSP;
33efebe6
DM
2015 SV *left, *right;
2016
2017 tryAMAGICbin_MG(ne_amg, AMGf_set|AMGf_numeric);
2018 right = POPs;
2019 left = TOPs;
2020 SETs(boolSV(
2021 (SvIOK_notUV(left) && SvIOK_notUV(right))
2022 ? (SvIVX(left) != SvIVX(right))
2023 : (do_ncmp(left, right) != 0)
2024 ));
2025 RETURN;
2026}
1b6737cc 2027
33efebe6
DM
2028/* compare left and right SVs. Returns:
2029 * -1: <
2030 * 0: ==
2031 * 1: >
2032 * 2: left or right was a NaN
2033 */
2034I32
2035Perl_do_ncmp(pTHX_ SV* const left, SV * const right)
2036{
33efebe6
DM
2037 PERL_ARGS_ASSERT_DO_NCMP;
2038#ifdef PERL_PRESERVE_IVUV
33efebe6 2039 /* Fortunately it seems NaN isn't IOK */
01f91bf2 2040 if (SvIV_please_nomg(right) && SvIV_please_nomg(left)) {
33efebe6
DM
2041 if (!SvUOK(left)) {
2042 const IV leftiv = SvIVX(left);
2043 if (!SvUOK(right)) {
2044 /* ## IV <=> IV ## */
2045 const IV rightiv = SvIVX(right);
2046 return (leftiv > rightiv) - (leftiv < rightiv);
28e5dec8 2047 }
33efebe6
DM
2048 /* ## IV <=> UV ## */
2049 if (leftiv < 0)
2050 /* As (b) is a UV, it's >=0, so it must be < */
2051 return -1;
2052 {
2053 const UV rightuv = SvUVX(right);
2054 return ((UV)leftiv > rightuv) - ((UV)leftiv < rightuv);
28e5dec8 2055 }
28e5dec8 2056 }
79072805 2057
33efebe6
DM
2058 if (SvUOK(right)) {
2059 /* ## UV <=> UV ## */
2060 const UV leftuv = SvUVX(left);
2061 const UV rightuv = SvUVX(right);
2062 return (leftuv > rightuv) - (leftuv < rightuv);
28e5dec8 2063 }
33efebe6
DM
2064 /* ## UV <=> IV ## */
2065 {
2066 const IV rightiv = SvIVX(right);
2067 if (rightiv < 0)
2068 /* As (a) is a UV, it's >=0, so it cannot be < */
2069 return 1;
2070 {
2071 const UV leftuv = SvUVX(left);
2072 return (leftuv > (UV)rightiv) - (leftuv < (UV)rightiv);
28e5dec8 2073 }
28e5dec8 2074 }
e5964223 2075 NOT_REACHED; /* NOTREACHED */
28e5dec8
JH
2076 }
2077#endif
a0d0e21e 2078 {
33efebe6
DM
2079 NV const rnv = SvNV_nomg(right);
2080 NV const lnv = SvNV_nomg(left);
2081
cab190d4 2082#if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
33efebe6
DM
2083 if (Perl_isnan(lnv) || Perl_isnan(rnv)) {
2084 return 2;
2085 }
2086 return (lnv > rnv) - (lnv < rnv);
cab190d4 2087#else
33efebe6
DM
2088 if (lnv < rnv)
2089 return -1;
2090 if (lnv > rnv)
2091 return 1;
659c4b96 2092 if (lnv == rnv)
33efebe6
DM
2093 return 0;
2094 return 2;
cab190d4 2095#endif
a0d0e21e 2096 }
79072805
LW
2097}
2098
33efebe6 2099
a0d0e21e 2100PP(pp_ncmp)
79072805 2101{
20b7effb 2102 dSP;
33efebe6
DM
2103 SV *left, *right;
2104 I32 value;
a42d0242 2105 tryAMAGICbin_MG(ncmp_amg, AMGf_numeric);
33efebe6
DM
2106 right = POPs;
2107 left = TOPs;
2108 value = do_ncmp(left, right);
2109 if (value == 2) {
3280af22 2110 SETs(&PL_sv_undef);
79072805 2111 }
33efebe6
DM
2112 else {
2113 dTARGET;
2114 SETi(value);
2115 }
2116 RETURN;
a0d0e21e 2117}
79072805 2118
b1c05ba5
DM
2119
2120/* also used for: pp_sge() pp_sgt() pp_slt() */
2121
afd9910b 2122PP(pp_sle)
a0d0e21e 2123{
20b7effb 2124 dSP;
79072805 2125
afd9910b
NC
2126 int amg_type = sle_amg;
2127 int multiplier = 1;
2128 int rhs = 1;
79072805 2129
afd9910b
NC
2130 switch (PL_op->op_type) {
2131 case OP_SLT:
2132 amg_type = slt_amg;
2133 /* cmp < 0 */
2134 rhs = 0;
2135 break;
2136 case OP_SGT:
2137 amg_type = sgt_amg;
2138 /* cmp > 0 */
2139 multiplier = -1;
2140 rhs = 0;
2141 break;
2142 case OP_SGE:
2143 amg_type = sge_amg;
2144 /* cmp >= 0 */
2145 multiplier = -1;
2146 break;
79072805 2147 }
79072805 2148
6f1401dc 2149 tryAMAGICbin_MG(amg_type, AMGf_set);
a0d0e21e
LW
2150 {
2151 dPOPTOPssrl;
130c5df3 2152 const int cmp =
5778acb6 2153#ifdef USE_LOCALE_COLLATE
130c5df3
KW
2154 (IN_LC_RUNTIME(LC_COLLATE))
2155 ? sv_cmp_locale_flags(left, right, 0)
2156 :
2157#endif
2158 sv_cmp_flags(left, right, 0);
afd9910b 2159 SETs(boolSV(cmp * multiplier < rhs));
a0d0e21e
LW
2160 RETURN;
2161 }
2162}
79072805 2163
36477c24
PP
2164PP(pp_seq)
2165{
20b7effb 2166 dSP;
6f1401dc 2167 tryAMAGICbin_MG(seq_amg, AMGf_set);
36477c24
PP
2168 {
2169 dPOPTOPssrl;
078504b2 2170 SETs(boolSV(sv_eq_flags(left, right, 0)));
a0d0e21e
LW
2171 RETURN;
2172 }
2173}
79072805 2174
a0d0e21e 2175PP(pp_sne)
79072805 2176{
20b7effb 2177 dSP;
6f1401dc 2178 tryAMAGICbin_MG(sne_amg, AMGf_set);
a0d0e21e
LW
2179 {
2180 dPOPTOPssrl;
078504b2 2181 SETs(boolSV(!sv_eq_flags(left, right, 0)));
a0d0e21e 2182 RETURN;
463ee0b2 2183 }
79072805
LW
2184}
2185
a0d0e21e 2186PP(pp_scmp)
79072805 2187{
20b7effb 2188 dSP; dTARGET;
6f1401dc 2189 tryAMAGICbin_MG(scmp_amg, 0);
a0d0e21e
LW
2190 {
2191 dPOPTOPssrl;
130c5df3 2192 const int cmp =
5778acb6 2193#ifdef USE_LOCALE_COLLATE
130c5df3
KW
2194 (IN_LC_RUNTIME(LC_COLLATE))
2195 ? sv_cmp_locale_flags(left, right, 0)
2196 :
2197#endif
2198 sv_cmp_flags(left, right, 0);
bbce6d69 2199 SETi( cmp );
a0d0e21e
LW
2200 RETURN;
2201 }
2202}
79072805 2203
55497cff
PP
2204PP(pp_bit_and)
2205{
20b7effb 2206 dSP; dATARGET;
6f1401dc 2207 tryAMAGICbin_MG(band_amg, AMGf_assign);
a0d0e21e
LW
2208 {
2209 dPOPTOPssrl;
4633a7c4 2210 if (SvNIOKp(left) || SvNIOKp(right)) {
b20c4ee1
FC
2211 const bool left_ro_nonnum = !SvNIOKp(left) && SvREADONLY(left);
2212 const bool right_ro_nonnum = !SvNIOKp(right) && SvREADONLY(right);
d0ba1bd2 2213 if (PL_op->op_private & HINT_INTEGER) {
1b6737cc 2214 const IV i = SvIV_nomg(left) & SvIV_nomg(right);
972b05a9 2215 SETi(i);
d0ba1bd2
JH
2216 }
2217 else {
1b6737cc 2218 const UV u = SvUV_nomg(left) & SvUV_nomg(right);
972b05a9 2219 SETu(u);
d0ba1bd2 2220 }
5ee80e13 2221 if (left_ro_nonnum && left != TARG) SvNIOK_off(left);
b20c4ee1 2222 if (right_ro_nonnum) SvNIOK_off(right);
a0d0e21e
LW
2223 }
2224 else {
533c011a 2225 do_vop(PL_op->op_type, TARG, left, right);
a0d0e21e
LW
2226 SETTARG;
2227 }
2228 RETURN;
2229 }
2230}
79072805 2231
5d01050a
FC
2232PP(pp_nbit_and)
2233{
2234 dSP;
636ac8fc 2235 tryAMAGICbin_MG(band_amg, AMGf_assign|AMGf_numarg);
5d01050a
FC
2236 {
2237 dATARGET; dPOPTOPssrl;
2238 if (PL_op->op_private & HINT_INTEGER) {
2239 const IV i = SvIV_nomg(left) & SvIV_nomg(right);
2240 SETi(i);
2241 }
2242 else {
2243 const UV u = SvUV_nomg(left) & SvUV_nomg(right);
2244 SETu(u);
2245 }
2246 }
2247 RETURN;
2248}
2249
2250PP(pp_sbit_and)
2251{
2252 dSP;
2253 tryAMAGICbin_MG(sband_amg, AMGf_assign);
2254 {
2255 dATARGET; dPOPTOPssrl;
2256 do_vop(OP_BIT_AND, TARG, left, right);
2257 RETSETTARG;
2258 }
2259}
b1c05ba5
DM
2260
2261/* also used for: pp_bit_xor() */
2262
a0d0e21e
LW
2263PP(pp_bit_or)
2264{
20b7effb 2265 dSP; dATARGET;
3658c1f1
NC
2266 const int op_type = PL_op->op_type;
2267
6f1401dc 2268 tryAMAGICbin_MG((op_type == OP_BIT_OR ? bor_amg : bxor_amg), AMGf_assign);
a0d0e21e
LW
2269 {
2270 dPOPTOPssrl;
4633a7c4 2271 if (SvNIOKp(left) || SvNIOKp(right)) {
b20c4ee1
FC
2272 const bool left_ro_nonnum = !SvNIOKp(left) && SvREADONLY(left);
2273 const bool right_ro_nonnum = !SvNIOKp(right) && SvREADONLY(right);
d0ba1bd2 2274 if (PL_op->op_private & HINT_INTEGER) {
3658c1f1
NC
2275 const IV l = (USE_LEFT(left) ? SvIV_nomg(left) : 0);
2276 const IV r = SvIV_nomg(right);
2277 const IV result = op_type == OP_BIT_OR ? (l | r) : (l ^ r);
2278 SETi(result);
d0ba1bd2
JH
2279 }
2280 else {
3658c1f1
NC
2281 const UV l = (USE_LEFT(left) ? SvUV_nomg(left) : 0);
2282 const UV r = SvUV_nomg(right);
2283 const UV result = op_type == OP_BIT_OR ? (l | r) : (l ^ r);
2284 SETu(result);
d0ba1bd2 2285 }
5ee80e13 2286 if (left_ro_nonnum && left != TARG) SvNIOK_off(left);
b20c4ee1 2287 if (right_ro_nonnum) SvNIOK_off(right);
a0d0e21e
LW
2288 }
2289 else {
3658c1f1 2290 do_vop(op_type, TARG, left, right);
a0d0e21e
LW
2291 SETTARG;
2292 }
2293 RETURN;
79072805 2294 }
a0d0e21e 2295}
79072805 2296
5d01050a
FC
2297/* also used for: pp_nbit_xor() */
2298
2299PP(pp_nbit_or)
2300{
2301 dSP;
2302 const int op_type = PL_op->op_type;
2303
2304 tryAMAGICbin_MG((op_type == OP_NBIT_OR ? bor_amg : bxor_amg),
636ac8fc 2305 AMGf_assign|AMGf_numarg);
5d01050a
FC
2306 {
2307 dATARGET; dPOPTOPssrl;
2308 if (PL_op->op_private & HINT_INTEGER) {
2309 const IV l = (USE_LEFT(left) ? SvIV_nomg(left) : 0);
2310 const IV r = SvIV_nomg(right);
2311 const IV result = op_type == OP_NBIT_OR ? (l | r) : (l ^ r);
2312 SETi(result);
2313 }
2314 else {
2315 const UV l = (USE_LEFT(left) ? SvUV_nomg(left) : 0);
2316 const UV r = SvUV_nomg(right);
2317 const UV result = op_type == OP_NBIT_OR ? (l | r) : (l ^ r);
2318 SETu(result);
2319 }
2320 }
2321 RETURN;
2322}
2323
2324/* also used for: pp_sbit_xor() */
2325
2326PP(pp_sbit_or)
2327{
2328 dSP;
2329 const int op_type = PL_op->op_type;
2330
2331 tryAMAGICbin_MG((op_type == OP_SBIT_OR ? sbor_amg : sbxor_amg),
2332 AMGf_assign);
2333 {
2334 dATARGET; dPOPTOPssrl;
2335 do_vop(op_type == OP_SBIT_OR ? OP_BIT_OR : OP_BIT_XOR, TARG, left,
2336 right);
2337 RETSETTARG;
2338 }
2339}
2340
1c2b3fd6
FC
2341PERL_STATIC_INLINE bool
2342S_negate_string(pTHX)
2343{
2344 dTARGET; dSP;
2345 STRLEN len;
2346 const char *s;
2347 SV * const sv = TOPs;
2348 if (!SvPOKp(sv) || SvNIOK(sv) || (!SvPOK(sv) && SvNIOKp(sv)))
2349 return FALSE;
2350 s = SvPV_nomg_const(sv, len);
2351 if (isIDFIRST(*s)) {
2352 sv_setpvs(TARG, "-");
2353 sv_catsv(TARG, sv);
2354 }
2355 else if (*s == '+' || (*s == '-' && !looks_like_number(sv))) {
2356 sv_setsv_nomg(TARG, sv);
2357 *SvPV_force_nomg(TARG, len) = *s == '-' ? '+' : '-';
2358 }
2359 else return FALSE;
245d035e 2360 SETTARG;
1c2b3fd6
FC
2361 return TRUE;
2362}
2363
a0d0e21e
LW
2364PP(pp_negate)
2365{
20b7effb 2366 dSP; dTARGET;
6f1401dc 2367 tryAMAGICun_MG(neg_amg, AMGf_numeric);
1c2b3fd6 2368 if (S_negate_string(aTHX)) return NORMAL;
a0d0e21e 2369 {
6f1401dc 2370 SV * const sv = TOPs;
a5b92898 2371
d96ab1b5 2372 if (SvIOK(sv)) {
7dbe3150 2373 /* It's publicly an integer */
28e5dec8 2374 oops_its_an_int:
9b0e499b
GS
2375 if (SvIsUV(sv)) {
2376 if (SvIVX(sv) == IV_MIN) {
28e5dec8 2377 /* 2s complement assumption. */
d14578b8
KW
2378 SETi(SvIVX(sv)); /* special case: -((UV)IV_MAX+1) ==
2379 IV_MIN */
245d035e 2380 return NORMAL;
9b0e499b
GS
2381 }
2382 else if (SvUVX(sv) <= IV_MAX) {
beccb14c 2383 SETi(-SvIVX(sv));
245d035e 2384 return NORMAL;
9b0e499b
GS
2385 }
2386 }
2387 else if (SvIVX(sv) != IV_MIN) {
2388 SETi(-SvIVX(sv));
245d035e 2389 return NORMAL;
9b0e499b 2390 }
28e5dec8
JH
2391#ifdef PERL_PRESERVE_IVUV
2392 else {
2393 SETu((UV)IV_MIN);
245d035e 2394 return NORMAL;
28e5dec8
JH
2395 }
2396#endif
9b0e499b 2397 }
8a5decd8 2398 if (SvNIOKp(sv) && (SvNIOK(sv) || !SvPOK(sv)))
6f1401dc 2399 SETn(-SvNV_nomg(sv));
1c2b3fd6 2400 else if (SvPOKp(sv) && SvIV_please_nomg(sv))
8eb28a70 2401 goto oops_its_an_int;
4633a7c4 2402 else
6f1401dc 2403 SETn(-SvNV_nomg(sv));
79072805 2404 }
245d035e 2405 return NORMAL;
79072805
LW
2406}
2407
a0d0e21e 2408PP(pp_not)
79072805 2409{
20b7effb 2410 dSP;
6f1401dc 2411 tryAMAGICun_MG(not_amg, AMGf_set);
06c841cf 2412 *PL_stack_sp = boolSV(!SvTRUE_nomg(*PL_stack_sp));
a0d0e21e 2413 return NORMAL;
79072805
LW
2414}
2415
5d01050a
FC
2416static void
2417S_scomplement(pTHX_ SV *targ, SV *sv)
79072805 2418{
eb578fdb
KW
2419 U8 *tmps;
2420 I32 anum;
a0d0e21e
LW
2421 STRLEN len;
2422
85b0ee6e
FC
2423 sv_copypv_nomg(TARG, sv);
2424 tmps = (U8*)SvPV_nomg(TARG, len);
a0d0e21e 2425 anum = len;
1d68d6cd 2426 if (SvUTF8(TARG)) {
a1ca4561 2427 /* Calculate exact length, let's not estimate. */
1d68d6cd 2428 STRLEN targlen = 0;
ba210ebe 2429 STRLEN l;
a1ca4561
YST
2430 UV nchar = 0;
2431 UV nwide = 0;
01f6e806 2432 U8 * const send = tmps + len;
74d49cd0
ST
2433 U8 * const origtmps = tmps;
2434 const UV utf8flags = UTF8_ALLOW_ANYUV;
1d68d6cd 2435
1d68d6cd 2436 while (tmps < send) {
74d49cd0
ST
2437 const UV c = utf8n_to_uvchr(tmps, send-tmps, &l, utf8flags);
2438 tmps += l;
5bbb0b5a 2439 targlen += UNISKIP(~c);
a1ca4561
YST
2440 nchar++;
2441 if (c > 0xff)
2442 nwide++;
1d68d6cd
SC
2443 }
2444
2445 /* Now rewind strings and write them. */
74d49cd0 2446 tmps = origtmps;
a1ca4561
YST
2447
2448 if (nwide) {
01f6e806
AL
2449 U8 *result;
2450 U8 *p;
2451
74d49cd0 2452 Newx(result, targlen + 1, U8);
01f6e806 2453 p = result;
a1ca4561 2454 while (tmps < send) {
74d49cd0
ST
2455 const UV c = utf8n_to_uvchr(tmps, send-tmps, &l, utf8flags);
2456 tmps += l;
01f6e806 2457 p = uvchr_to_utf8_flags(p, ~c, UNICODE_ALLOW_ANY);
a1ca4561 2458 }
01f6e806 2459 *p = '\0';
c1c21316
NC
2460 sv_usepvn_flags(TARG, (char*)result, targlen,
2461 SV_HAS_TRAILING_NUL);
a1ca4561
YST
2462 SvUTF8_on(TARG);
2463 }
2464 else {
01f6e806
AL
2465 U8 *result;
2466 U8 *p;
2467
74d49cd0 2468 Newx(result, nchar + 1, U8);
01f6e806 2469 p = result;
a1ca4561 2470 while (tmps < send) {
74d49cd0
ST
2471 const U8 c = (U8)utf8n_to_uvchr(tmps, send-tmps, &l, utf8flags);
2472 tmps += l;
01f6e806 2473 *p++ = ~c;
a1ca4561 2474 }
01f6e806 2475 *p = '\0';
c1c21316 2476 sv_usepvn_flags(TARG, (char*)result, nchar, SV_HAS_TRAILING_NUL);
d0a21e00 2477 SvUTF8_off(TARG);
1d68d6cd 2478 }
5d01050a 2479 return;
1d68d6cd 2480 }
a0d0e21e 2481#ifdef LIBERAL
51723571 2482 {
eb578fdb 2483 long *tmpl;
51723571
JH
2484 for ( ; anum && (unsigned long)tmps % sizeof(long); anum--, tmps++)
2485 *tmps = ~*tmps;
2486 tmpl = (long*)tmps;
bb7a0f54 2487 for ( ; anum >= (I32)sizeof(long); anum -= (I32)sizeof(long), tmpl++)
51723571
JH
2488 *tmpl = ~*tmpl;
2489 tmps = (U8*)tmpl;
2490 }
a0d0e21e
LW
2491#endif
2492 for ( ; anum > 0; anum--, tmps++)
2493 *tmps = ~*tmps;
5d01050a
FC
2494}
2495
2496PP(pp_complement)
2497{
2498 dSP; dTARGET;
2499 tryAMAGICun_MG(compl_amg, AMGf_numeric);
2500 {
2501 dTOPss;
2502 if (SvNIOKp(sv)) {
2503 if (PL_op->op_private & HINT_INTEGER) {
2504 const IV i = ~SvIV_nomg(sv);
2505 SETi(i);
2506 }
2507 else {
2508 const UV u = ~SvUV_nomg(sv);
2509 SETu(u);
2510 }
2511 }
2512 else {
2513 S_scomplement(aTHX_ TARG, sv);
ec93b65f 2514 SETTARG;
a0d0e21e 2515 }
24840750 2516 return NORMAL;
5d01050a
FC
2517 }
2518}
2519
2520PP(pp_ncomplement)
2521{
2522 dSP;
636ac8fc 2523 tryAMAGICun_MG(compl_amg, AMGf_numeric|AMGf_numarg);
5d01050a
FC
2524 {
2525 dTARGET; dTOPss;
2526 if (PL_op->op_private & HINT_INTEGER) {
2527 const IV i = ~SvIV_nomg(sv);
2528 SETi(i);
2529 }
2530 else {
2531 const UV u = ~SvUV_nomg(sv);
2532 SETu(u);
2533 }
2534 }
2535 return NORMAL;
2536}
2537
2538PP(pp_scomplement)
2539{
2540 dSP;
2541 tryAMAGICun_MG(scompl_amg, AMGf_numeric);
2542 {
2543 dTARGET; dTOPss;
2544 S_scomplement(aTHX_ TARG, sv);
2545 SETTARG;
2546 return NORMAL;
a0d0e21e 2547 }
79072805
LW
2548}
2549
a0d0e21e
LW
2550/* integer versions of some of the above */
2551
a0d0e21e 2552PP(pp_i_multiply)
79072805 2553{
20b7effb 2554 dSP; dATARGET;
6f1401dc 2555 tryAMAGICbin_MG(mult_amg, AMGf_assign);
a0d0e21e 2556 {
6f1401dc 2557 dPOPTOPiirl_nomg;
a0d0e21e
LW
2558 SETi( left * right );
2559 RETURN;
2560 }
79072805
LW
2561}
2562
a0d0e21e 2563PP(pp_i_divide)
79072805 2564{
85935d8e 2565 IV num;
20b7effb 2566 dSP; dATARGET;
6f1401dc 2567 tryAMAGICbin_MG(div_amg, AMGf_assign);
a0d0e21e 2568 {
6f1401dc 2569 dPOPTOPssrl;
85935d8e 2570 IV value = SvIV_nomg(right);
a0d0e21e 2571 if (value == 0)
ece1bcef 2572 DIE(aTHX_ "Illegal division by zero");
85935d8e 2573 num = SvIV_nomg(left);
a0cec769
YST
2574
2575 /* avoid FPE_INTOVF on some platforms when num is IV_MIN */
2576 if (value == -1)
2577 value = - num;
2578 else
2579 value = num / value;
6f1401dc 2580 SETi(value);
a0d0e21e
LW
2581 RETURN;
2582 }
79072805
LW
2583}
2584
bf3d06aa
JC
2585#if defined(__GLIBC__) && IVSIZE == 8 && !defined(PERL_DEBUG_READONLY_OPS) \
2586 && ( __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 8))
224ec323
JH
2587STATIC
2588PP(pp_i_modulo_0)
befad5d1
NC
2589#else
2590PP(pp_i_modulo)
2591#endif
224ec323
JH
2592{
2593 /* This is the vanilla old i_modulo. */
20b7effb 2594 dSP; dATARGET;
6f1401dc 2595 tryAMAGICbin_MG(modulo_amg, AMGf_assign);
224ec323 2596 {
6f1401dc 2597 dPOPTOPiirl_nomg;
224ec323
JH
2598 if (!right)
2599 DIE(aTHX_ "Illegal modulus zero");
a0cec769
YST
2600 /* avoid FPE_INTOVF on some platforms when left is IV_MIN */
2601 if (right == -1)
2602 SETi( 0 );
2603 else
2604 SETi( left % right );
224ec323
JH
2605 RETURN;
2606 }
2607}
2608
bf3d06aa
JC
2609#if defined(__GLIBC__) && IVSIZE == 8 && !defined(PERL_DEBUG_READONLY_OPS) \
2610 && ( __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 8))
224ec323
JH
2611STATIC
2612PP(pp_i_modulo_1)
befad5d1 2613
224ec323 2614{
224ec323 2615 /* This is the i_modulo with the workaround for the _moddi3 bug
fce2b89e 2616 * in (at least) glibc 2.2.5 (the PERL_ABS() the workaround).
224ec323 2617 * See below for pp_i_modulo. */
20b7effb 2618 dSP; dATARGET;
6f1401dc 2619 tryAMAGICbin_MG(modulo_amg, AMGf_assign);
224ec323 2620 {
6f1401dc 2621 dPOPTOPiirl_nomg;
224ec323
JH
2622 if (!right)
2623 DIE(aTHX_ "Illegal modulus zero");
a0cec769
YST
2624 /* avoid FPE_INTOVF on some platforms when left is IV_MIN */
2625 if (right == -1)
2626 SETi( 0 );
2627 else
2628 SETi( left % PERL_ABS(right) );
224ec323
JH
2629 RETURN;
2630 }
224ec323
JH
2631}
2632
a0d0e21e 2633PP(pp_i_modulo)
79072805 2634{
6f1401dc
DM
2635 dVAR; dSP; dATARGET;
2636 tryAMAGICbin_MG(modulo_amg, AMGf_assign);
224ec323 2637 {
6f1401dc 2638 dPOPTOPiirl_nomg;
224ec323
JH
2639 if (!right)
2640 DIE(aTHX_ "Illegal modulus zero");
2641 /* The assumption is to use hereafter the old vanilla version... */
2642 PL_op->op_ppaddr =
2643 PL_ppaddr[OP_I_MODULO] =
1c127fab 2644 Perl_pp_i_modulo_0;
224ec323 2645 /* .. but if we have glibc, we might have a buggy _moddi3
bf3d06aa 2646 * (at least glibc 2.2.5 is known to have this bug), in other
224ec323
JH
2647 * words our integer modulus with negative quad as the second
2648 * argument might be broken. Test for this and re-patch the
2649 * opcode dispatch table if that is the case, remembering to
2650 * also apply the workaround so that this first round works
2651 * right, too. See [perl #9402] for more information. */
224ec323
JH
2652 {
2653 IV l = 3;
2654 IV r = -10;
2655 /* Cannot do this check with inlined IV constants since
2656 * that seems to work correctly even with the buggy glibc. */
2657 if (l % r == -3) {
2658 /* Yikes, we have the bug.
2659 * Patch in the workaround version. */
2660 PL_op->op_ppaddr =
2661 PL_ppaddr[OP_I_MODULO] =
2662 &Perl_pp_i_modulo_1;
2663 /* Make certain we work right this time, too. */
32fdb065 2664 right = PERL_ABS(right);
224ec323
JH
2665 }
2666 }
a0cec769
YST
2667 /* avoid FPE_INTOVF on some platforms when left is IV_MIN */
2668 if (right == -1)
2669 SETi( 0 );
2670 else
2671 SETi( left % right );
224ec323
JH
2672 RETURN;
2673 }
79072805 2674}
befad5d1 2675#endif
79072805 2676
a0d0e21e 2677PP(pp_i_add)
79072805 2678{
20b7effb 2679 dSP; dATARGET;
6f1401dc 2680 tryAMAGICbin_MG(add_amg, AMGf_assign);
a0d0e21e 2681 {
6f1401dc 2682 dPOPTOPiirl_ul_nomg;
a0d0e21e
LW
2683 SETi( left + right );
2684 RETURN;
79072805 2685 }
79072805
LW
2686}
2687
a0d0e21e 2688PP(pp_i_subtract)
79072805 2689{
20b7effb 2690 dSP; dATARGET;
6f1401dc 2691 tryAMAGICbin_MG(subtr_amg, AMGf_assign);
a0d0e21e 2692 {
6f1401dc 2693 dPOPTOPiirl_ul_nomg;
a0d0e21e
LW
2694 SETi( left - right );
2695 RETURN;
79072805 2696 }
79072805
LW
2697}
2698
a0d0e21e 2699PP(pp_i_lt)
79072805 2700{
20b7effb 2701 dSP;
6f1401dc 2702 tryAMAGICbin_MG(lt_amg, AMGf_set);
a0d0e21e 2703 {
96b6b87f 2704 dPOPTOPiirl_nomg;
54310121 2705 SETs(boolSV(left < right));
a0d0e21e
LW
2706 RETURN;
2707 }
79072805
LW
2708}
2709
a0d0e21e 2710PP(pp_i_gt)
79072805 2711{
20b7effb 2712 dSP;
6f1401dc 2713 tryAMAGICbin_MG(gt_amg, AMGf_set);
a0d0e21e 2714 {
96b6b87f 2715 dPOPTOPiirl_nomg;
54310121 2716 SETs(boolSV(left > right));
a0d0e21e
LW
2717 RETURN;
2718 }
79072805
LW
2719}
2720
a0d0e21e 2721PP(pp_i_le)
79072805 2722{
20b7effb 2723 dSP;
6f1401dc 2724 tryAMAGICbin_MG(le_amg, AMGf_set);
a0d0e21e 2725 {
96b6b87f 2726 dPOPTOPiirl_nomg;
54310121 2727 SETs(boolSV(left <= right));
a0d0e21e 2728 RETURN;
85e6fe83 2729 }
79072805
LW
2730}
2731
a0d0e21e 2732PP(pp_i_ge)
79072805 2733{
20b7effb 2734 dSP;
6f1401dc 2735 tryAMAGICbin_MG(ge_amg, AMGf_set);
a0d0e21e 2736 {
96b6b87f 2737 dPOPTOPiirl_nomg;
54310121 2738 SETs(boolSV(left >= right));
a0d0e21e
LW
2739 RETURN;
2740 }
79072805
LW
2741}
2742
a0d0e21e 2743PP(pp_i_eq)
79072805 2744{
20b7effb 2745 dSP;
6f1401dc 2746 tryAMAGICbin_MG(eq_amg, AMGf_set);
a0d0e21e 2747 {
96b6b87f 2748 dPOPTOPiirl_nomg;
54310121 2749 SETs(boolSV(left == right));
a0d0e21e
LW
2750 RETURN;
2751 }
79072805
LW
2752}
2753
a0d0e21e 2754PP(pp_i_ne)
79072805 2755{
20b7effb 2756 dSP;
6f1401dc 2757 tryAMAGICbin_MG(ne_amg, AMGf_set);
a0d0e21e 2758 {
96b6b87f 2759 dPOPTOPiirl_nomg;
54310121 2760 SETs(boolSV(left != right));
a0d0e21e
LW
2761 RETURN;
2762 }
79072805
LW
2763}
2764
a0d0e21e 2765PP(pp_i_ncmp)
79072805 2766{
20b7effb 2767 dSP; dTARGET;
6f1401dc 2768 tryAMAGICbin_MG(ncmp_amg, 0);
a0d0e21e 2769 {
96b6b87f 2770 dPOPTOPiirl_nomg;
a0d0e21e 2771 I32 value;
79072805 2772
a0d0e21e 2773 if (left > right)
79072805 2774 value = 1;
a0d0e21e 2775 else if (left < right)
79072805 2776 value = -1;
a0d0e21e 2777 else
79072805 2778 value = 0;
a0d0e21e
LW
2779 SETi(value);
2780 RETURN;
79072805 2781 }
85e6fe83
LW
2782}
2783
2784PP(pp_i_negate)
2785{
20b7effb 2786 dSP; dTARGET;
6f1401dc 2787 tryAMAGICun_MG(neg_amg, 0);
1c2b3fd6 2788 if (S_negate_string(aTHX)) return NORMAL;
6f1401dc
DM
2789 {
2790 SV * const sv = TOPs;
2791 IV const i = SvIV_nomg(sv);
2792 SETi(-i);
ae642386 2793 return NORMAL;
6f1401dc 2794 }
85e6fe83
LW
2795}
2796
79072805
LW
2797/* High falutin' math. */
2798
2799PP(pp_atan2)
2800{
20b7effb 2801 dSP; dTARGET;
6f1401dc 2802 tryAMAGICbin_MG(atan2_amg, 0);
a0d0e21e 2803 {
096c060c 2804 dPOPTOPnnrl_nomg;
a1021d57 2805 SETn(Perl_atan2(left, right));
a0d0e21e
LW
2806 RETURN;
2807 }
79072805
LW
2808}
2809
b1c05ba5
DM
2810
2811/* also used for: pp_cos() pp_exp() pp_log() pp_sqrt() */
2812
79072805
LW
2813PP(pp_sin)
2814{
20b7effb 2815 dSP; dTARGET;
af71714e 2816 int amg_type = fallback_amg;
71302fe3 2817 const char *neg_report = NULL;
71302fe3
NC
2818 const int op_type = PL_op->op_type;
2819
2820 switch (op_type) {
af71714e
JH
2821 case OP_SIN: amg_type = sin_amg; break;
2822 case OP_COS: amg_type = cos_amg; break;
2823 case OP_EXP: amg_type = exp_amg; break;
2824 case OP_LOG: amg_type = log_amg; neg_report = "log"; break;
2825 case OP_SQRT: amg_type = sqrt_amg; neg_report = "sqrt"; break;
a0d0e21e 2826 }
79072805 2827
af71714e 2828 assert(amg_type != fallback_amg);
6f1401dc
DM
2829
2830 tryAMAGICun_MG(amg_type, 0);
a0d0e21e 2831 {
8c78ed36 2832 SV * const arg = TOPs;
6f1401dc 2833 const NV value = SvNV_nomg(arg);
f256868e 2834 NV result = NV_NAN;
af71714e 2835 if (neg_report) { /* log or sqrt */
a3463d96
DD
2836 if (
2837#if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
2838 ! Perl_isnan(value) &&
2839#endif
2840 (op_type == OP_LOG ? (value <= 0.0) : (value < 0.0))) {
71302fe3 2841 SET_NUMERIC_STANDARD();
dcbac5bb 2842 /* diag_listed_as: Can't take log of %g */
71302fe3
NC
2843 DIE(aTHX_ "Can't take %s of %"NVgf, neg_report, value);
2844 }
2845 }
af71714e 2846 switch (op_type) {
f256868e 2847 default:
af71714e
JH
2848 case OP_SIN: result = Perl_sin(value); break;
2849 case OP_COS: result = Perl_cos(value); break;
2850 case OP_EXP: result = Perl_exp(value); break;
2851 case OP_LOG: result = Perl_log(value); break;
2852 case OP_SQRT: result = Perl_sqrt(value); break;
2853 }
8c78ed36
FC
2854 SETn(result);
2855 return NORMAL;
a0d0e21e 2856 }
79072805
LW
2857}
2858
56cb0a1c
AD
2859/* Support Configure command-line overrides for rand() functions.
2860 After 5.005, perhaps we should replace this by Configure support
2861 for drand48(), random(), or rand(). For 5.005, though, maintain
2862 compatibility by calling rand() but allow the user to override it.
2863 See INSTALL for details. --Andy Dougherty 15 July 1998
2864*/
85ab1d1d
JH
2865/* Now it's after 5.005, and Configure supports drand48() and random(),
2866 in addition to rand(). So the overrides should not be needed any more.
2867 --Jarkko Hietaniemi 27 September 1998
2868 */
2869
79072805
LW
2870PP(pp_rand)
2871{
80252599 2872 if (!PL_srand_called) {
85ab1d1d 2873 (void)seedDrand01((Rand_seed_t)seed());
80252599 2874 PL_srand_called = TRUE;
93dc8474 2875 }
fdf4dddd
DD
2876 {
2877 dSP;
2878 NV value;
fdf4dddd
DD
2879
2880 if (MAXARG < 1)
7e9044f9
FC
2881 {
2882 EXTEND(SP, 1);
fdf4dddd 2883 value = 1.0;
7e9044f9 2884 }
fdf4dddd
DD
2885 else {
2886 SV * const sv = POPs;
2887 if(!sv)
2888 value = 1.0;
2889 else
2890 value = SvNV(sv);
2891 }
2892 /* 1 of 2 things can be carried through SvNV, SP or TARG, SP was carried */
a3463d96
DD
2893#if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
2894 if (! Perl_isnan(value) && value == 0.0)
2895#else
659c4b96 2896 if (value == 0.0)
a3463d96 2897#endif
fdf4dddd
DD
2898 value = 1.0;
2899 {
2900 dTARGET;
2901 PUSHs(TARG);
2902 PUTBACK;
2903 value *= Drand01();
2904 sv_setnv_mg(TARG, value);
2905 }
2906 }
2907 return NORMAL;
79072805
LW
2908}
2909
2910PP(pp_srand)
2911{
20b7effb 2912 dSP; dTARGET;
f914a682
JL
2913 UV anum;
2914
0a5f3363 2915 if (MAXARG >= 1 && (TOPs || POPs)) {
f914a682
JL
2916 SV *top;
2917 char *pv;
2918 STRLEN len;
2919 int flags;
2920
2921 top = POPs;
2922 pv = SvPV(top, len);
2923 flags = grok_number(pv, len, &anum);
2924
2925 if (!(flags & IS_NUMBER_IN_UV)) {
2926 Perl_ck_warner_d(aTHX_ packWARN(WARN_OVERFLOW),
2927 "Integer overflow in srand");
2928 anum = UV_MAX;
2929 }
2930 }
2931 else {
2932 anum = seed();
2933 }
2934
85ab1d1d 2935 (void)seedDrand01((Rand_seed_t)anum);
80252599 2936 PL_srand_called = TRUE;
da1010ec
NC
2937 if (anum)
2938 XPUSHu(anum);
2939 else {
2940 /* Historically srand always returned true. We can avoid breaking
2941 that like this: */
2942 sv_setpvs(TARG, "0 but true");
2943 XPUSHTARG;
2944 }
83832992 2945 RETURN;
79072805
LW
2946}
2947
79072805
LW
2948PP(pp_int)
2949{
20b7effb 2950 dSP; dTARGET;
6f1401dc 2951 tryAMAGICun_MG(int_amg, AMGf_numeric);
774d564b 2952 {
6f1401dc
DM
2953 SV * const sv = TOPs;
2954 const IV iv = SvIV_nomg(sv);
28e5dec8
JH
2955 /* XXX it's arguable that compiler casting to IV might be subtly
2956 different from modf (for numbers inside (IV_MIN,UV_MAX)) in which
2957 else preferring IV has introduced a subtle behaviour change bug. OTOH
2958 relying on floating point to be accurate is a bug. */
2959
c781a409 2960 if (!SvOK(sv)) {
922c4365 2961 SETu(0);
c781a409
RD
2962 }
2963 else if (SvIOK(sv)) {
2964 if (SvIsUV(sv))
6f1401dc 2965 SETu(SvUV_nomg(sv));
c781a409 2966 else
28e5dec8 2967 SETi(iv);
c781a409 2968 }
c781a409 2969 else {
6f1401dc 2970 const NV value = SvNV_nomg(sv);
b9d05018
FC
2971 if (UNLIKELY(Perl_isinfnan(value)))
2972 SETn(value);
5bf8b78e 2973 else if (value >= 0.0) {
28e5dec8
JH
2974 if (value < (NV)UV_MAX + 0.5) {
2975 SETu(U_V(value));
2976 } else {
059a1014 2977 SETn(Perl_floor(value));
28e5dec8 2978 }
1048ea30 2979 }
28e5dec8
JH
2980 else {
2981 if (value > (NV)IV_MIN - 0.5) {
2982 SETi(I_V(value));
2983 } else {
1bbae031 2984 SETn(Perl_ceil(value));
28e5dec8
JH
2985 }
2986 }
774d564b 2987 }
79072805 2988 }
699e9491 2989 return NORMAL;
79072805
LW
2990}
2991
463ee0b2
LW
2992PP(pp_abs)
2993{
20b7effb 2994 dSP; dTARGET;
6f1401dc 2995 tryAMAGICun_MG(abs_amg, AMGf_numeric);
a0d0e21e 2996 {
6f1401dc 2997 SV * const sv = TOPs;
28e5dec8 2998 /* This will cache the NV value if string isn't actually integer */
6f1401dc 2999 const IV iv = SvIV_nomg(sv);
a227d84d 3000
800401ee 3001 if (!SvOK(sv)) {
922c4365 3002 SETu(0);
800401ee
JH
3003 }
3004 else if (SvIOK(sv)) {
28e5dec8 3005 /* IVX is precise */
800401ee 3006 if (SvIsUV(sv)) {
6f1401dc 3007 SETu(SvUV_nomg(sv)); /* force it to be numeric only */
28e5dec8
JH
3008 } else {
3009 if (iv >= 0) {
3010 SETi(iv);
3011 } else {
3012 if (iv != IV_MIN) {
3013 SETi(-iv);
3014 } else {
3015 /* 2s complement assumption. Also, not really needed as
3016 IV_MIN and -IV_MIN should both be %100...00 and NV-able */
3017 SETu(IV_MIN);
3018 }
a227d84d 3019 }
28e5dec8
JH
3020 }
3021 } else{
6f1401dc 3022 const NV value = SvNV_nomg(sv);
774d564b 3023 if (value < 0.0)
1b6737cc 3024 SETn(-value);
a4474c9e
DD
3025 else
3026 SETn(value);
774d564b 3027 }
a0d0e21e 3028 }
067b7929 3029 return NORMAL;
463ee0b2
LW
3030}
3031
b1c05ba5
DM
3032
3033/* also used for: pp_hex() */
3034
79072805
LW
3035PP(pp_oct)
3036{
20b7effb 3037 dSP; dTARGET;
5c144d81 3038 const char *tmps;
53305cf1 3039 I32 flags = PERL_SCAN_ALLOW_UNDERSCORES;
6f894ead 3040 STRLEN len;
53305cf1
NC
3041 NV result_nv;
3042 UV result_uv;
4e51bcca 3043 SV* const sv = TOPs;
79072805 3044
349d4f2f 3045 tmps = (SvPV_const(sv, len));
2bc69dc4
NIS
3046 if (DO_UTF8(sv)) {
3047 /* If Unicode, try to downgrade
3048 * If not possible, croak. */
1b6737cc 3049 SV* const tsv = sv_2mortal(newSVsv(sv));
2bc69dc4
NIS
3050
3051 SvUTF8_on(tsv);
3052 sv_utf8_downgrade(tsv, FALSE);
349d4f2f 3053 tmps = SvPV_const(tsv, len);
2bc69dc4 3054 }
daa2adfd
NC
3055 if (PL_op->op_type == OP_HEX)
3056 goto hex;
3057
6f894ead 3058 while (*tmps && len && isSPACE(*tmps))
53305cf1 3059 tmps++, len--;
9e24b6e2 3060 if (*tmps == '0')
53305cf1 3061 tmps++, len--;
305b8651 3062 if (isALPHA_FOLD_EQ(*tmps, 'x')) {
daa2adfd 3063 hex:
53305cf1 3064 result_uv = grok_hex (tmps, &len, &flags, &result_nv);
daa2adfd 3065 }
305b8651 3066 else if (isALPHA_FOLD_EQ(*tmps, 'b'))
53305cf1 3067 result_uv = grok_bin (tmps, &len, &flags, &result_nv);
464e2e8a 3068 else
53305cf1
NC
3069 result_uv = grok_oct (tmps, &len, &flags, &result_nv);
3070
3071 if (flags & PERL_SCAN_GREATER_THAN_UV_MAX) {
4e51bcca 3072 SETn(result_nv);
53305cf1
NC
3073 }
3074 else {
4e51bcca 3075 SETu(result_uv);
53305cf1 3076 }
4e51bcca 3077 return NORMAL;
79072805
LW
3078}
3079
3080/* String stuff. */
3081
3082PP(pp_length)
3083{
20b7effb 3084 dSP; dTARGET;
0bd48802 3085 SV * const sv = TOPs;
a0ed51b3 3086
7776003e
DD
3087 U32 in_bytes = IN_BYTES;
3088 /* simplest case shortcut */
3089 /* turn off SVf_UTF8 in tmp flags if HINT_BYTES on*/
3090 U32 svflags = (SvFLAGS(sv) ^ (in_bytes << 26)) & (SVf_POK|SVs_GMG|SVf_UTF8);
6d59e610 3091 STATIC_ASSERT_STMT(HINT_BYTES == 0x00000008 && SVf_UTF8 == 0x20000000 && (SVf_UTF8 == HINT_BYTES << 26));
7776003e
DD
3092 SETs(TARG);
3093
3094 if(LIKELY(svflags == SVf_POK))
3095 goto simple_pv;
3096 if(svflags & SVs_GMG)
3097 mg_get(sv);
0f43fd57 3098 if (SvOK(sv)) {
7776003e
DD
3099 if (!IN_BYTES) /* reread to avoid using an C auto/register */
3100 sv_setiv(TARG, (IV)sv_len_utf8_nomg(sv));
9f621bb0 3101 else
0f43fd57
FC
3102 {
3103 STRLEN len;
7776003e
DD
3104 /* unrolled SvPV_nomg_const(sv,len) */
3105 if(SvPOK_nog(sv)){
3106 simple_pv:
3107 len = SvCUR(sv);
3108 } else {
3109 (void)sv_2pv_flags(sv, &len, 0|SV_CONST_RETURN);
3110 }
3111 sv_setiv(TARG, (IV)(len));
0f43fd57 3112 }
656266fc 3113 } else {
9407f9c1
DL
3114 if (!SvPADTMP(TARG)) {
3115 sv_setsv_nomg(TARG, &PL_sv_undef);
7776003e
DD
3116 } else { /* TARG is on stack at this point and is overwriten by SETs.
3117 This branch is the odd one out, so put TARG by default on
3118 stack earlier to let local SP go out of liveness sooner */
3119 SETs(&PL_sv_undef);
3120 goto no_set_magic;
3121 }
92331800 3122 }
7776003e
DD
3123 SvSETMAGIC(TARG);
3124 no_set_magic:
3125 return NORMAL; /* no putback, SP didn't move in this opcode */
79072805
LW
3126}
3127
83f78d1a
FC
3128/* Returns false if substring is completely outside original string.
3129 No length is indicated by len_iv = 0 and len_is_uv = 0. len_is_uv must
3130 always be true for an explicit 0.
3131*/
3132bool
ddeaf645
DD
3133Perl_translate_substr_offsets( STRLEN curlen, IV pos1_iv,
3134 bool pos1_is_uv, IV len_iv,
3135 bool len_is_uv, STRLEN *posp,
3136 STRLEN *lenp)
83f78d1a
FC
3137{
3138 IV pos2_iv;
3139 int pos2_is_uv;
3140
3141 PERL_ARGS_ASSERT_TRANSLATE_SUBSTR_OFFSETS;
3142
3143 if (!pos1_is_uv && pos1_iv < 0 && curlen) {
3144 pos1_is_uv = curlen-1 > ~(UV)pos1_iv;
3145 pos1_iv += curlen;
3146 }
3147 if ((pos1_is_uv || pos1_iv > 0) && (UV)pos1_iv > curlen)
3148 return FALSE;
3149
3150 if (len_iv || len_is_uv) {
3151 if (!len_is_uv && len_iv < 0) {
3152 pos2_iv = curlen + len_iv;
3153 if (curlen)
3154 pos2_is_uv = curlen-1 > ~(UV)len_iv;
3155 else
3156 pos2_is_uv = 0;
3157 } else { /* len_iv >= 0 */
3158 if (!pos1_is_uv && pos1_iv < 0) {
3159 pos2_iv = pos1_iv + len_iv;
3160 pos2_is_uv = (UV)len_iv > (UV)IV_MAX;
3161 } else {
3162 if ((UV)len_iv > curlen-(UV)pos1_iv)
3163 pos2_iv = curlen;
3164 else
3165 pos2_iv = pos1_iv+len_iv;
3166 pos2_is_uv = 1;
3167 }
3168 }
3169 }
3170 else {
3171 pos2_iv = curlen;
3172 pos2_is_uv = 1;
3173 }
3174
3175 if (!pos2_is_uv && pos2_iv < 0) {
3176 if (!pos1_is_uv && pos1_iv < 0)
3177 return FALSE;
3178 pos2_iv = 0;
3179 }
3180 else if (!pos1_is_uv && pos1_iv < 0)
3181 pos1_iv = 0;
3182
3183 if ((UV)pos2_iv < (UV)pos1_iv)
3184 pos2_iv = pos1_iv;
3185 if ((UV)pos2_iv > curlen)
3186 pos2_iv = curlen;
3187
3188 /* pos1_iv and pos2_iv both in 0..curlen, so the cast is safe */
3189 *posp = (STRLEN)( (UV)pos1_iv );
3190 *lenp = (STRLEN)( (UV)pos2_iv - (UV)pos1_iv );
3191
3192 return TRUE;
3193}
3194
79072805
LW
3195PP(pp_substr)
3196{
20b7effb 3197 dSP; dTARGET;
79072805 3198 SV *sv;
463ee0b2 3199 STRLEN curlen;
9402d6ed 3200 STRLEN utf8_curlen;
777f7c56
EB
3201 SV * pos_sv;
3202 IV pos1_iv;
3203 int pos1_is_uv;
777f7c56
EB
3204 SV * len_sv;
3205 IV len_iv = 0;
83f78d1a 3206 int len_is_uv = 0;
24fcb59f 3207 I32 lvalue = PL_op->op_flags & OPf_MOD || LVRET;
bbddc9e0 3208 const bool rvalue = (GIMME_V != G_VOID);
e1ec3a88 3209 const char *tmps;
9402d6ed 3210 SV *repl_sv = NULL;
cbbf8932 3211 const char *repl = NULL;
7b8d334a 3212 STRLEN repl_len;
7bc95ae1 3213 int num_args = PL_op->op_private & 7;
13e30c65 3214 bool repl_need_utf8_upgrade = FALSE;
79072805 3215
78f9721b
SM
3216 if (num_args > 2) {
3217 if (num_args > 3) {
24fcb59f 3218 if(!(repl_sv = POPs)) num_args--;
7bc95ae1
FC
3219 }
3220 if ((len_sv = POPs)) {
3221 len_iv = SvIV(len_sv);
83f78d1a 3222 len_is_uv = len_iv ? SvIOK_UV(len_sv) : 1;
7b8d334a 3223 }
7bc95ae1 3224 else num_args--;
5d82c453 3225 }
777f7c56
EB
3226 pos_sv = POPs;
3227 pos1_iv = SvIV(pos_sv);
3228 pos1_is_uv = SvIOK_UV(pos_sv);
79072805 3229 sv = POPs;
24fcb59f
FC
3230 if (PL_op->op_private & OPpSUBSTR_REPL_FIRST) {
3231 assert(!repl_sv);
3232 repl_sv = POPs;
3233 }
6582db62 3234 if (lvalue && !repl_sv) {
83f78d1a
FC
3235 SV * ret;
3236 ret = sv_2mortal(newSV_type(SVt_PVLV)); /* Not TARG RT#67838 */
3237 sv_magic(ret, NULL, PERL_MAGIC_substr, NULL, 0);
3238 LvTYPE(ret) = 'x';
3239 LvTARG(ret) = SvREFCNT_inc_simple(sv);
3240 LvTARGOFF(ret) =
3241 pos1_is_uv || pos1_iv >= 0
3242 ? (STRLEN)(UV)pos1_iv
3243 : (LvFLAGS(ret) |= 1, (STRLEN)(UV)-pos1_iv);
3244 LvTARGLEN(ret) =
3245 len_is_uv || len_iv > 0
3246 ? (STRLEN)(UV)len_iv
3247 : (LvFLAGS(ret) |= 2, (STRLEN)(UV)-len_iv);
3248
83f78d1a
FC
3249 PUSHs(ret); /* avoid SvSETMAGIC here */
3250 RETURN;
a74fb2cd 3251 }
6582db62
FC
3252 if (repl_sv) {
3253 repl = SvPV_const(repl_sv, repl_len);
3254 SvGETMAGIC(sv);
3255 if (SvROK(sv))
3256 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR),
3257 "Attempt to use reference as lvalue in substr"
3258 );
3259 tmps = SvPV_force_nomg(sv, curlen);
3260 if (DO_UTF8(repl_sv) && repl_len) {
3261 if (!DO_UTF8(sv)) {
01680ee9 3262 sv_utf8_upgrade_nomg(sv);
6582db62
FC
3263 curlen = SvCUR(sv);
3264 }
3265 }
3266 else if (DO_UTF8(sv))
3267 repl_need_utf8_upgrade = TRUE;
3268 }
3269 else tmps = SvPV_const(sv, curlen);
7e2040f0 3270 if (DO_UTF8(sv)) {
0d788f38 3271 utf8_curlen = sv_or_pv_len_utf8(sv, tmps, curlen);
9402d6ed
JH
3272 if (utf8_curlen == curlen)
3273 utf8_curlen = 0;
a0ed51b3 3274 else
9402d6ed 3275 curlen = utf8_curlen;
a0ed51b3 3276 }
d1c2b58a 3277 else
9402d6ed 3278 utf8_curlen = 0;
a0ed51b3 3279
83f78d1a
FC
3280 {
3281 STRLEN pos, len, byte_len, byte_pos;
777f7c56 3282
83f78d1a
FC
3283 if (!translate_substr_offsets(
3284 curlen, pos1_iv, pos1_is_uv, len_iv, len_is_uv, &pos, &len
3285 )) goto bound_fail;
777f7c56 3286
83f78d1a
FC
3287 byte_len = len;
3288 byte_pos = utf8_curlen
0d788f38 3289 ? sv_or_pv_pos_u2b(sv, tmps, pos, &byte_len) : pos;
d931b1be 3290
2154eca7 3291 tmps += byte_pos;
bbddc9e0
CS
3292
3293 if (rvalue) {
3294 SvTAINTED_off(TARG); /* decontaminate */
3295 SvUTF8_off(TARG); /* decontaminate */
3296 sv_setpvn(TARG, tmps, byte_len);
12aa1545 3297#ifdef USE_LOCALE_COLLATE
bbddc9e0 3298 sv_unmagic(TARG, PERL_MAGIC_collxfrm);
12aa1545 3299#endif
bbddc9e0
CS
3300 if (utf8_curlen)
3301 SvUTF8_on(TARG);
3302 }
2154eca7 3303
f7928d6c 3304 if (repl) {
13e30c65
JH
3305 SV* repl_sv_copy = NULL;
3306
3307 if (repl_need_utf8_upgrade) {
3308 repl_sv_copy = newSVsv(repl_sv);
3309 sv_utf8_upgrade(repl_sv_copy);
349d4f2f 3310 repl = SvPV_const(repl_sv_copy, repl_len);
13e30c65 3311 }
502d9230
VP
3312 if (!SvOK(sv))
3313 sv_setpvs(sv, "");
777f7c56 3314 sv_insert_flags(sv, byte_pos, byte_len, repl, repl_len, 0);
ef8d46e8 3315 SvREFCNT_dec(repl_sv_copy);
f7928d6c 3316 }
79072805 3317 }
6a9665b0
FC
3318 if (PL_op->op_private & OPpSUBSTR_REPL_FIRST)
3319 SP++;
3320 else if (rvalue) {
bbddc9e0
CS
3321 SvSETMAGIC(TARG);
3322 PUSHs(TARG);
3323 }
79072805 3324 RETURN;
777f7c56 3325
7b52d656 3326 bound_fail:
83f78d1a 3327 if (repl)
777f7c56
EB
3328 Perl_croak(aTHX_ "substr outside of string");
3329 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string");
3330 RETPUSHUNDEF;
79072805
LW
3331}
3332
3333PP(pp_vec)
3334{
20b7effb 3335 dSP;
eb578fdb
KW
3336 const IV size = POPi;
3337 const IV offset = POPi;
3338 SV * const src = POPs;
1b6737cc 3339 const I32 lvalue = PL_op->op_flags & OPf_MOD || LVRET;
2154eca7 3340 SV * ret;
a0d0e21e 3341
81e118e0 3342 if (lvalue) { /* it's an lvalue! */
2154eca7
EB
3343 ret = sv_2mortal(newSV_type(SVt_PVLV)); /* Not TARG RT#67838 */
3344 sv_magic(ret, NULL, PERL_MAGIC_vec, NULL, 0);
3345 LvTYPE(ret) = 'v';
3346 LvTARG(ret) = SvREFCNT_inc_simple(src);
3347 LvTARGOFF(ret) = offset;
3348 LvTARGLEN(ret) = size;
3349 }
3350 else {
3351 dTARGET;
3352 SvTAINTED_off(TARG); /* decontaminate */
3353 ret = TARG;
79072805
LW
3354 }
3355
2154eca7 3356 sv_setuv(ret, do_vecget(src, offset, size));
f9e95907
FC
3357 if (!lvalue)
3358 SvSETMAGIC(ret);
2154eca7 3359 PUSHs(ret);
79072805
LW
3360 RETURN;
3361}
3362
b1c05ba5
DM
3363
3364/* also used for: pp_rindex() */
3365
79072805
LW
3366PP(pp_index)
3367{
20b7effb 3368 dSP; dTARGET;
79072805
LW
3369 SV *big;
3370 SV *little;
c445ea15 3371 SV *temp = NULL;
ad66a58c 3372 STRLEN biglen;
2723d216 3373 STRLEN llen = 0;
b464e2b7
TC
3374 SSize_t offset = 0;
3375 SSize_t retval;
73ee8be2
NC
3376 const char *big_p;
3377 const char *little_p;
2f040f7f
NC
3378 bool big_utf8;
3379 bool little_utf8;
2723d216 3380 const bool is_index = PL_op->op_type == OP_INDEX;
d3e26383 3381 const bool threeargs = MAXARG >= 3 && (TOPs || ((void)POPs,0));
79072805 3382
e1dccc0d
Z
3383 if (threeargs)
3384 offset = POPi;
79072805
LW
3385 little = POPs;
3386 big = POPs;
73ee8be2
NC
3387 big_p = SvPV_const(big, biglen);
3388 little_p = SvPV_const(little, llen);
3389
e609e586
NC
3390 big_utf8 = DO_UTF8(big);
3391 little_utf8 = DO_UTF8(little);
3392 if (big_utf8 ^ little_utf8) {
3393 /* One needs to be upgraded. */
47e13f24 3394 if (little_utf8 && !IN_ENCODING) {
2f040f7f
NC
3395 /* Well, maybe instead we might be able to downgrade the small
3396 string? */
1eced8f8 3397 char * const pv = (char*)bytes_from_utf8((U8 *)little_p, &llen,
2f040f7f
NC
3398 &little_utf8);
3399 if (little_utf8) {
3400 /* If the large string is ISO-8859-1, and it's not possible to
3401 convert the small string to ISO-8859-1, then there is no
3402 way that it could be found anywhere by index. */
3403 retval = -1;
3404 goto fail;
3405 }
e609e586 3406
2f040f7f
NC
3407 /* At this point, pv is a malloc()ed string. So donate it to temp
3408 to ensure it will get free()d */
3409 little = temp = newSV(0);
73ee8be2
NC
3410 sv_usepvn(temp, pv, llen);
3411 little_p = SvPVX(little);
e609e586 3412 } else {
73ee8be2
NC
3413 temp = little_utf8
3414 ? newSVpvn(big_p, biglen) : newSVpvn(little_p, llen);
2f040f7f 3415
47e13f24 3416 if (IN_ENCODING) {
ad2de1b2 3417 sv_recode_to_utf8(temp, _get_encoding());
2f040f7f
NC
3418 } else {
3419 sv_utf8_upgrade(temp);
3420 }
3421 if (little_utf8) {
3422 big = temp;
3423 big_utf8 = TRUE;
73ee8be2 3424 big_p = SvPV_const(big, biglen);
2f040f7f
NC
3425 } else {
3426 little = temp;
73ee8be2 3427 little_p = SvPV_const(little, llen);
2f040f7f 3428 }
e609e586
NC
3429 }
3430 }
73ee8be2
NC
3431 if (SvGAMAGIC(big)) {
3432 /* Life just becomes a lot easier if I use a temporary here.
3433 Otherwise I need to avoid calls to sv_pos_u2b(), which (dangerously)
3434 will trigger magic and overloading again, as will fbm_instr()
3435 */
59cd0e26
NC
3436 big = newSVpvn_flags(big_p, biglen,
3437 SVs_TEMP | (big_utf8 ? SVf_UTF8 : 0));
73ee8be2
NC
3438 big_p = SvPVX(big);
3439 }
e4e44778 3440 if (SvGAMAGIC(little) || (is_index && !SvOK(little))) {
73ee8be2
NC
3441 /* index && SvOK() is a hack. fbm_instr() calls SvPV_const, which will
3442 warn on undef, and we've already triggered a warning with the
3443 SvPV_const some lines above. We can't remove that, as we need to
3444 call some SvPV to trigger overloading early and find out if the
3445 string is UTF-8.
3446 This is all getting to messy. The API isn't quite clean enough,
3447 because data access has side effects.
3448 */
59cd0e26
NC
3449 little = newSVpvn_flags(little_p, llen,
3450 SVs_TEMP | (little_utf8 ? SVf_UTF8 : 0));
73ee8be2
NC
3451 little_p = SvPVX(little);
3452 }
e609e586 3453
d3e26383 3454 if (!threeargs)
2723d216 3455 offset = is_index ? 0 : biglen;
a0ed51b3 3456 else {
ad66a58c 3457 if (big_utf8 && offset > 0)
b464e2b7 3458 offset = sv_pos_u2b_flags(big, offset, 0, SV_CONST_RETURN);
73ee8be2
NC
3459 if (!is_index)
3460 offset += llen;
a0ed51b3 3461 }
79072805
LW
3462 if (offset < 0)
3463 offset = 0;
b464e2b7 3464 else if (offset > (SSize_t)biglen)
ad66a58c 3465 offset = biglen;
73ee8be2
NC
3466 if (!(little_p = is_index
3467 ? fbm_instr((unsigned char*)big_p + offset,
3468 (unsigned char*)big_p + biglen, little, 0)
3469 : rninstr(big_p, big_p + offset,
3470 little_p, little_p + llen)))
a0ed51b3 3471 retval = -1;
ad66a58c 3472 else {
73ee8be2 3473 retval = little_p - big_p;
15c41403 3474 if (retval > 1 && big_utf8)
b464e2b7 3475 retval = sv_pos_b2u_flags(big, retval, SV_CONST_RETURN);
ad66a58c 3476 }
ef8d46e8 3477 SvREFCNT_dec(temp);
2723d216 3478 fail:
e1dccc0d 3479 PUSHi(retval);
79072805
LW
3480 RETURN;
3481}
3482
3483PP(pp_sprintf)
3484{
20b7effb 3485 dSP; dMARK; dORIGMARK; dTARGET;
3e6bd4bf 3486 SvTAINTED_off(TARG);
79072805 3487 do_sprintf(TARG, SP-MARK, MARK+1);
bbce6d69 3488 TAINT_IF(SvTAINTED(TARG));
79072805
LW
3489 SP = ORIGMARK;
3490 PUSHTARG;
3491 RETURN;
3492}
3493
79072805
LW
3494PP(pp_ord)
3495{
20b7effb 3496 dSP; dTARGET;
1eced8f8 3497
6ba92227 3498 SV *argsv = TOPs;
ba210ebe 3499 STRLEN len;
349d4f2f 3500 const U8 *s = (U8*)SvPV_const(argsv, len);
121910a4 3501
47e13f24 3502 if (IN_ENCODING && SvPOK(argsv) && !DO_UTF8(argsv)) {
1eced8f8 3503 SV * const tmpsv = sv_2mortal(newSVsv(argsv));
ad2de1b2 3504 s = (U8*)sv_recode_to_utf8(tmpsv, _get_encoding());
4f6386b6 3505 len = UTF8SKIP(s); /* Should be well-formed; so this is its length */
121910a4
JH
3506 argsv = tmpsv;
3507 }
79072805 3508
6ba92227 3509 SETu(DO_UTF8(argsv)
4f6386b6 3510 ? utf8n_to_uvchr(s, len, 0, UTF8_ALLOW_ANYUV)
f3943cf2 3511 : (UV)(*s));
68795e93 3512
6ba92227 3513 return NORMAL;
79072805
LW
3514}
3515
463ee0b2
LW
3516PP(pp_chr)
3517{
20b7effb 3518 dSP; dTARGET;
463ee0b2 3519 char *tmps;
8a064bd6 3520 UV value;
d3261b99 3521 SV *top = TOPs;
8a064bd6 3522
71739502 3523 SvGETMAGIC(top);
9911fc4e
FC
3524 if (UNLIKELY(SvAMAGIC(top)))
3525 top = sv_2num(top);
99f450cc 3526 if (UNLIKELY(isinfnansv(top)))
0c7df902 3527 Perl_croak(aTHX_ "Cannot chr %"NVgf, SvNV(top));
1cd88304
JH
3528 else {
3529 if (!IN_BYTES /* under bytes, chr(-1) eq chr(0xff), etc. */
3530 && ((SvIOKp(top) && !SvIsUV(top) && SvIV_nomg(top) < 0)
3531 ||
3532 ((SvNOKp(top) || (SvOK(top) && !SvIsUV(top)))
3533 && SvNV_nomg(top) < 0.0))) {
b3fe8680
FC
3534 if (ckWARN(WARN_UTF8)) {
3535 if (SvGMAGICAL(top)) {
3536 SV *top2 = sv_newmortal();
3537 sv_setsv_nomg(top2, top);
3538 top = top2;
3539 }
1cd88304
JH
3540 Perl_warner(aTHX_ packWARN(WARN_UTF8),
3541 "Invalid negative number (%"SVf") in chr", SVfARG(top));
3542 }
3543 value = UNICODE_REPLACEMENT;
3544 } else {
3545 value = SvUV_nomg(top);
3546 }
8a064bd6 3547 }
463ee0b2 3548
862a34c6 3549 SvUPGRADE(TARG,SVt_PV);
a0ed51b3 3550
0064a8a9 3551 if (value > 255 && !IN_BYTES) {
eb160463 3552 SvGROW(TARG, (STRLEN)UNISKIP(value)+1);
62961d2e 3553 tmps = (char*)uvchr_to_utf8_flags((U8*)SvPVX(TARG), value, 0);
349d4f2f 3554 SvCUR_set(TARG, tmps - SvPVX_const(TARG));
a0ed51b3
LW
3555 *tmps = '\0';
3556 (void)SvPOK_only(TARG);
aa6ffa16 3557 SvUTF8_on(TARG);
d3261b99
FC
3558 SETTARG;
3559 return NORMAL;
a0ed51b3
LW
3560 }
3561
748a9306 3562 SvGROW(TARG,2);
463ee0b2
LW
3563 SvCUR_set(TARG, 1);
3564 tmps = SvPVX(TARG);
eb160463 3565 *tmps++ = (char)value;
748a9306 3566 *tmps = '\0';
a0d0e21e 3567 (void)SvPOK_only(TARG);
4c5ed6e2 3568
47e13f24 3569 if (IN_ENCODING && !IN_BYTES) {
ad2de1b2 3570 sv_recode_to_utf8(TARG, _get_encoding());
88632417 3571 tmps = SvPVX(TARG);
28936164
KW
3572 if (SvCUR(TARG) == 0
3573 || ! is_utf8_string((U8*)tmps, SvCUR(TARG))
3574 || UTF8_IS_REPLACEMENT((U8*) tmps, (U8*) tmps + SvCUR(TARG)))
3575 {
4c5ed6e2 3576 SvGROW(TARG, 2);
d5a15ac2 3577 tmps = SvPVX(TARG);
4c5ed6e2
ST
3578 SvCUR_set(TARG, 1);
3579 *tmps++ = (char)value;
88632417 3580 *tmps = '\0';
4c5ed6e2 3581 SvUTF8_off(TARG);
88632417
JH
3582 }
3583 }