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[perl5.git] / sv.c
CommitLineData
a0d0e21e 1/* sv.c
79072805 2 *
3818b22b 3 * Copyright (c) 1991-2000, Larry Wall
79072805
LW		 4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "I wonder what the Entish is for 'yes' and 'no'," he thought.
79072805
LW		 12 */
13
14#include "EXTERN.h"
864dbfa3 15#define PERL_IN_SV_C
79072805 16#include "perl.h"
79072805 17
51371543 18#define FCALL *f
6fc92669 19#define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) sv_force_normal(sv)
2c5424a7 20
51371543
GS		 21static void do_report_used(pTHXo_ SV *sv);
22static void do_clean_objs(pTHXo_ SV *sv);
23#ifndef DISABLE_DESTRUCTOR_KLUDGE
24static void do_clean_named_objs(pTHXo_ SV *sv);
25#endif
26static void do_clean_all(pTHXo_ SV *sv);
27
4561caa4
CS		 28/*
29 * "A time to plant, and a time to uproot what was planted..."
30 */
31
053fc874
GS		 32#define plant_SV(p) \
33 STMT_START { \
34 SvANY(p) = (void *)PL_sv_root; \
35 SvFLAGS(p) = SVTYPEMASK; \
36 PL_sv_root = (p); \
37 --PL_sv_count; \
38 } STMT_END
a0d0e21e 39
fba3b22e 40/* sv_mutex must be held while calling uproot_SV() */
053fc874
GS		 41#define uproot_SV(p) \
42 STMT_START { \
43 (p) = PL_sv_root; \
44 PL_sv_root = (SV*)SvANY(p); \
45 ++PL_sv_count; \
46 } STMT_END
47
48#define new_SV(p) \
49 STMT_START { \
50 LOCK_SV_MUTEX; \
51 if (PL_sv_root) \
52 uproot_SV(p); \
53 else \
54 (p) = more_sv(); \
55 UNLOCK_SV_MUTEX; \
56 SvANY(p) = 0; \
57 SvREFCNT(p) = 1; \
58 SvFLAGS(p) = 0; \
59 } STMT_END
463ee0b2 60
a0d0e21e 61#ifdef DEBUGGING
4561caa4 62
053fc874
GS		 63#define del_SV(p) \
64 STMT_START { \
65 LOCK_SV_MUTEX; \
66 if (PL_debug & 32768) \
67 del_sv(p); \
68 else \
69 plant_SV(p); \
70 UNLOCK_SV_MUTEX; \
71 } STMT_END
a0d0e21e 72
76e3520e 73STATIC void
cea2e8a9 74S_del_sv(pTHX_ SV *p)
463ee0b2 75{
3280af22 76 if (PL_debug & 32768) {
4633a7c4 77 SV* sva;
a0d0e21e
LW		 78 SV* sv;
79 SV* svend;
80 int ok = 0;
3280af22 81 for (sva = PL_sv_arenaroot; sva; sva = (SV *) SvANY(sva)) {
4633a7c4
LW		 82 sv = sva + 1;
83 svend = &sva[SvREFCNT(sva)];
a0d0e21e
LW		 84 if (p >= sv && p < svend)
85 ok = 1;
86 }
87 if (!ok) {
0453d815
PM		 88 if (ckWARN_d(WARN_INTERNAL))
89 Perl_warner(aTHX_ WARN_INTERNAL,
1d7c1841
GS		 90 "Attempt to free non-arena SV: 0x%"UVxf,
91 PTR2UV(p));
a0d0e21e
LW		 92 return;
93 }
94 }
4561caa4 95 plant_SV(p);
463ee0b2 96}
a0d0e21e 97
4561caa4
CS		 98#else /* ! DEBUGGING */
99
100#define del_SV(p) plant_SV(p)
101
102#endif /* DEBUGGING */
463ee0b2 103
4633a7c4 104void
864dbfa3 105Perl_sv_add_arena(pTHX_ char *ptr, U32 size, U32 flags)
463ee0b2 106{
4633a7c4 107 SV* sva = (SV*)ptr;
463ee0b2
LW		 108 register SV* sv;
109 register SV* svend;
14dd3ad8 110 Zero(ptr, size, char);
4633a7c4
LW		 111
112 /* The first SV in an arena isn't an SV. */
3280af22 113 SvANY(sva) = (void *) PL_sv_arenaroot; /* ptr to next arena */
4633a7c4
LW		 114 SvREFCNT(sva) = size / sizeof(SV); /* number of SV slots */
115 SvFLAGS(sva) = flags; /* FAKE if not to be freed */
116
3280af22
NIS		 117 PL_sv_arenaroot = sva;
118 PL_sv_root = sva + 1;
4633a7c4
LW		 119
120 svend = &sva[SvREFCNT(sva) - 1];
121 sv = sva + 1;
463ee0b2 122 while (sv < svend) {
a0d0e21e 123 SvANY(sv) = (void *)(SV*)(sv + 1);
8990e307 124 SvFLAGS(sv) = SVTYPEMASK;
463ee0b2
LW		 125 sv++;
126 }
127 SvANY(sv) = 0;
4633a7c4
LW		 128 SvFLAGS(sv) = SVTYPEMASK;
129}
130
fba3b22e 131/* sv_mutex must be held while calling more_sv() */
76e3520e 132STATIC SV*
cea2e8a9 133S_more_sv(pTHX)
4633a7c4 134{
4561caa4
CS		 135 register SV* sv;
136
3280af22
NIS		 137 if (PL_nice_chunk) {
138 sv_add_arena(PL_nice_chunk, PL_nice_chunk_size, 0);
139 PL_nice_chunk = Nullch;
c07a80fd 140 }
1edc1566 141 else {
142 char *chunk; /* must use New here to match call to */
143 New(704,chunk,1008,char); /* Safefree() in sv_free_arenas() */
144 sv_add_arena(chunk, 1008, 0);
145 }
4561caa4
CS		 146 uproot_SV(sv);
147 return sv;
463ee0b2
LW		 148}
149
76e3520e 150STATIC void
cea2e8a9 151S_visit(pTHX_ SVFUNC_t f)
8990e307 152{
4633a7c4 153 SV* sva;
8990e307
LW		 154 SV* sv;
155 register SV* svend;
156
3280af22 157 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
4633a7c4 158 svend = &sva[SvREFCNT(sva)];
4561caa4
CS		 159 for (sv = sva + 1; sv < svend; ++sv) {
160 if (SvTYPE(sv) != SVTYPEMASK)
51371543 161 (FCALL)(aTHXo_ sv);
8990e307
LW		 162 }
163 }
164}
165
166void
864dbfa3 167Perl_sv_report_used(pTHX)
4561caa4 168{
0b94c7bb 169 visit(do_report_used);
4561caa4
CS		 170}
171
4561caa4 172void
864dbfa3 173Perl_sv_clean_objs(pTHX)
4561caa4 174{
3280af22 175 PL_in_clean_objs = TRUE;
0b94c7bb 176 visit(do_clean_objs);
4561caa4 177#ifndef DISABLE_DESTRUCTOR_KLUDGE
2d0f3c12 178 /* some barnacles may yet remain, clinging to typeglobs */
0b94c7bb 179 visit(do_clean_named_objs);
4561caa4 180#endif
3280af22 181 PL_in_clean_objs = FALSE;
4561caa4
CS		 182}
183
8990e307 184void
864dbfa3 185Perl_sv_clean_all(pTHX)
8990e307 186{
3280af22 187 PL_in_clean_all = TRUE;
0b94c7bb 188 visit(do_clean_all);
3280af22 189 PL_in_clean_all = FALSE;
8990e307 190}
463ee0b2 191
4633a7c4 192void
864dbfa3 193Perl_sv_free_arenas(pTHX)
4633a7c4
LW		 194{
195 SV* sva;
196 SV* svanext;
612f20c3 197 XPV *arena, *arenanext;
4633a7c4
LW		 198
199 /* Free arenas here, but be careful about fake ones. (We assume
200 contiguity of the fake ones with the corresponding real ones.) */
201
3280af22 202 for (sva = PL_sv_arenaroot; sva; sva = svanext) {
4633a7c4
LW		 203 svanext = (SV*) SvANY(sva);
204 while (svanext && SvFAKE(svanext))
205 svanext = (SV*) SvANY(svanext);
206
207 if (!SvFAKE(sva))
1edc1566 208 Safefree((void *)sva);
4633a7c4 209 }
5f05dabc 210
612f20c3
GS		 211 for (arena = PL_xiv_arenaroot; arena; arena = arenanext) {
212 arenanext = (XPV*)arena->xpv_pv;
213 Safefree(arena);
214 }
215 PL_xiv_arenaroot = 0;
216
217 for (arena = PL_xnv_arenaroot; arena; arena = arenanext) {
218 arenanext = (XPV*)arena->xpv_pv;
219 Safefree(arena);
220 }
221 PL_xnv_arenaroot = 0;
222
223 for (arena = PL_xrv_arenaroot; arena; arena = arenanext) {
224 arenanext = (XPV*)arena->xpv_pv;
225 Safefree(arena);
226 }
227 PL_xrv_arenaroot = 0;
228
229 for (arena = PL_xpv_arenaroot; arena; arena = arenanext) {
230 arenanext = (XPV*)arena->xpv_pv;
231 Safefree(arena);
232 }
233 PL_xpv_arenaroot = 0;
234
235 for (arena = (XPV*)PL_xpviv_arenaroot; arena; arena = arenanext) {
236 arenanext = (XPV*)arena->xpv_pv;
237 Safefree(arena);
238 }
239 PL_xpviv_arenaroot = 0;
240
241 for (arena = (XPV*)PL_xpvnv_arenaroot; arena; arena = arenanext) {
242 arenanext = (XPV*)arena->xpv_pv;
243 Safefree(arena);
244 }
245 PL_xpvnv_arenaroot = 0;
246
247 for (arena = (XPV*)PL_xpvcv_arenaroot; arena; arena = arenanext) {
248 arenanext = (XPV*)arena->xpv_pv;
249 Safefree(arena);
250 }
251 PL_xpvcv_arenaroot = 0;
252
253 for (arena = (XPV*)PL_xpvav_arenaroot; arena; arena = arenanext) {
254 arenanext = (XPV*)arena->xpv_pv;
255 Safefree(arena);
256 }
257 PL_xpvav_arenaroot = 0;
258
259 for (arena = (XPV*)PL_xpvhv_arenaroot; arena; arena = arenanext) {
260 arenanext = (XPV*)arena->xpv_pv;
261 Safefree(arena);
262 }
263 PL_xpvhv_arenaroot = 0;
264
265 for (arena = (XPV*)PL_xpvmg_arenaroot; arena; arena = arenanext) {
266 arenanext = (XPV*)arena->xpv_pv;
267 Safefree(arena);
268 }
269 PL_xpvmg_arenaroot = 0;
270
271 for (arena = (XPV*)PL_xpvlv_arenaroot; arena; arena = arenanext) {
272 arenanext = (XPV*)arena->xpv_pv;
273 Safefree(arena);
274 }
275 PL_xpvlv_arenaroot = 0;
276
277 for (arena = (XPV*)PL_xpvbm_arenaroot; arena; arena = arenanext) {
278 arenanext = (XPV*)arena->xpv_pv;
279 Safefree(arena);
280 }
281 PL_xpvbm_arenaroot = 0;
282
283 for (arena = (XPV*)PL_he_arenaroot; arena; arena = arenanext) {
284 arenanext = (XPV*)arena->xpv_pv;
285 Safefree(arena);
286 }
287 PL_he_arenaroot = 0;
288
3280af22
NIS		 289 if (PL_nice_chunk)
290 Safefree(PL_nice_chunk);
291 PL_nice_chunk = Nullch;
292 PL_nice_chunk_size = 0;
293 PL_sv_arenaroot = 0;
294 PL_sv_root = 0;
4633a7c4
LW		 295}
296
1d7c1841
GS		 297void
298Perl_report_uninit(pTHX)
299{
300 if (PL_op)
301 Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit,
302 " in ", PL_op_desc[PL_op->op_type]);
303 else
304 Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit, "", "");
305}
306
76e3520e 307STATIC XPVIV*
cea2e8a9 308S_new_xiv(pTHX)
463ee0b2 309{
ea7c11a3 310 IV* xiv;
cbe51380
GS		 311 LOCK_SV_MUTEX;
312 if (!PL_xiv_root)
313 more_xiv();
314 xiv = PL_xiv_root;
315 /*
316 * See comment in more_xiv() -- RAM.
317 */
318 PL_xiv_root = *(IV**)xiv;
319 UNLOCK_SV_MUTEX;
320 return (XPVIV*)((char*)xiv - STRUCT_OFFSET(XPVIV, xiv_iv));
463ee0b2
LW		 321}
322
76e3520e 323STATIC void
cea2e8a9 324S_del_xiv(pTHX_ XPVIV *p)
463ee0b2 325{
23e6a22f 326 IV* xiv = (IV*)((char*)(p) + STRUCT_OFFSET(XPVIV, xiv_iv));
cbe51380 327 LOCK_SV_MUTEX;
3280af22
NIS		 328 *(IV**)xiv = PL_xiv_root;
329 PL_xiv_root = xiv;
cbe51380 330 UNLOCK_SV_MUTEX;
463ee0b2
LW		 331}
332
cbe51380 333STATIC void
cea2e8a9 334S_more_xiv(pTHX)
463ee0b2 335{
ea7c11a3
SM		 336 register IV* xiv;
337 register IV* xivend;
8c52afec
IZ		 338 XPV* ptr;
339 New(705, ptr, 1008/sizeof(XPV), XPV);
3280af22
NIS		 340 ptr->xpv_pv = (char*)PL_xiv_arenaroot; /* linked list of xiv arenas */
341 PL_xiv_arenaroot = ptr; /* to keep Purify happy */
a0d0e21e 342
ea7c11a3
SM		 343 xiv = (IV*) ptr;
344 xivend = &xiv[1008 / sizeof(IV) - 1];
345 xiv += (sizeof(XPV) - 1) / sizeof(IV) + 1; /* fudge by size of XPV */
3280af22 346 PL_xiv_root = xiv;
463ee0b2 347 while (xiv < xivend) {
ea7c11a3 348 *(IV**)xiv = (IV *)(xiv + 1);
463ee0b2
LW		 349 xiv++;
350 }
ea7c11a3 351 *(IV**)xiv = 0;
463ee0b2
LW		 352}
353
76e3520e 354STATIC XPVNV*
cea2e8a9 355S_new_xnv(pTHX)
463ee0b2 356{
65202027 357 NV* xnv;
cbe51380
GS		 358 LOCK_SV_MUTEX;
359 if (!PL_xnv_root)
360 more_xnv();
361 xnv = PL_xnv_root;
65202027 362 PL_xnv_root = *(NV**)xnv;
cbe51380
GS		 363 UNLOCK_SV_MUTEX;
364 return (XPVNV*)((char*)xnv - STRUCT_OFFSET(XPVNV, xnv_nv));
463ee0b2
LW		 365}
366
76e3520e 367STATIC void
cea2e8a9 368S_del_xnv(pTHX_ XPVNV *p)
463ee0b2 369{
65202027 370 NV* xnv = (NV*)((char*)(p) + STRUCT_OFFSET(XPVNV, xnv_nv));
cbe51380 371 LOCK_SV_MUTEX;
65202027 372 *(NV**)xnv = PL_xnv_root;
3280af22 373 PL_xnv_root = xnv;
cbe51380 374 UNLOCK_SV_MUTEX;
463ee0b2
LW		 375}
376
cbe51380 377STATIC void
cea2e8a9 378S_more_xnv(pTHX)
463ee0b2 379{
65202027
DS		 380 register NV* xnv;
381 register NV* xnvend;
612f20c3
GS		 382 XPV *ptr;
383 New(711, ptr, 1008/sizeof(XPV), XPV);
384 ptr->xpv_pv = (char*)PL_xnv_arenaroot;
385 PL_xnv_arenaroot = ptr;
386
387 xnv = (NV*) ptr;
65202027
DS		 388 xnvend = &xnv[1008 / sizeof(NV) - 1];
389 xnv += (sizeof(XPVIV) - 1) / sizeof(NV) + 1; /* fudge by sizeof XPVIV */
3280af22 390 PL_xnv_root = xnv;
463ee0b2 391 while (xnv < xnvend) {
65202027 392 *(NV**)xnv = (NV*)(xnv + 1);
463ee0b2
LW		 393 xnv++;
394 }
65202027 395 *(NV**)xnv = 0;
463ee0b2
LW		 396}
397
76e3520e 398STATIC XRV*
cea2e8a9 399S_new_xrv(pTHX)
ed6116ce
LW		 400{
401 XRV* xrv;
cbe51380
GS		 402 LOCK_SV_MUTEX;
403 if (!PL_xrv_root)
404 more_xrv();
405 xrv = PL_xrv_root;
406 PL_xrv_root = (XRV*)xrv->xrv_rv;
407 UNLOCK_SV_MUTEX;
408 return xrv;
ed6116ce
LW		 409}
410
76e3520e 411STATIC void
cea2e8a9 412S_del_xrv(pTHX_ XRV *p)
ed6116ce 413{
cbe51380 414 LOCK_SV_MUTEX;
3280af22
NIS		 415 p->xrv_rv = (SV*)PL_xrv_root;
416 PL_xrv_root = p;
cbe51380 417 UNLOCK_SV_MUTEX;
ed6116ce
LW		 418}
419
cbe51380 420STATIC void
cea2e8a9 421S_more_xrv(pTHX)
ed6116ce 422{
ed6116ce
LW		 423 register XRV* xrv;
424 register XRV* xrvend;
612f20c3
GS		 425 XPV *ptr;
426 New(712, ptr, 1008/sizeof(XPV), XPV);
427 ptr->xpv_pv = (char*)PL_xrv_arenaroot;
428 PL_xrv_arenaroot = ptr;
429
430 xrv = (XRV*) ptr;
ed6116ce 431 xrvend = &xrv[1008 / sizeof(XRV) - 1];
612f20c3
GS		 432 xrv += (sizeof(XPV) - 1) / sizeof(XRV) + 1;
433 PL_xrv_root = xrv;
ed6116ce
LW		 434 while (xrv < xrvend) {
435 xrv->xrv_rv = (SV*)(xrv + 1);
436 xrv++;
437 }
438 xrv->xrv_rv = 0;
ed6116ce
LW		 439}
440
76e3520e 441STATIC XPV*
cea2e8a9 442S_new_xpv(pTHX)
463ee0b2
LW		 443{
444 XPV* xpv;
cbe51380
GS		 445 LOCK_SV_MUTEX;
446 if (!PL_xpv_root)
447 more_xpv();
448 xpv = PL_xpv_root;
449 PL_xpv_root = (XPV*)xpv->xpv_pv;
450 UNLOCK_SV_MUTEX;
451 return xpv;
463ee0b2
LW		 452}
453
76e3520e 454STATIC void
cea2e8a9 455S_del_xpv(pTHX_ XPV *p)
463ee0b2 456{
cbe51380 457 LOCK_SV_MUTEX;
3280af22
NIS		 458 p->xpv_pv = (char*)PL_xpv_root;
459 PL_xpv_root = p;
cbe51380 460 UNLOCK_SV_MUTEX;
463ee0b2
LW		 461}
462
cbe51380 463STATIC void
cea2e8a9 464S_more_xpv(pTHX)
463ee0b2 465{
463ee0b2
LW		 466 register XPV* xpv;
467 register XPV* xpvend;
612f20c3
GS		 468 New(713, xpv, 1008/sizeof(XPV), XPV);
469 xpv->xpv_pv = (char*)PL_xpv_arenaroot;
470 PL_xpv_arenaroot = xpv;
471
463ee0b2 472 xpvend = &xpv[1008 / sizeof(XPV) - 1];
612f20c3 473 PL_xpv_root = ++xpv;
463ee0b2
LW		 474 while (xpv < xpvend) {
475 xpv->xpv_pv = (char*)(xpv + 1);
476 xpv++;
477 }
478 xpv->xpv_pv = 0;
463ee0b2
LW		 479}
480
932e9ff9
VB		 481STATIC XPVIV*
482S_new_xpviv(pTHX)
483{
484 XPVIV* xpviv;
485 LOCK_SV_MUTEX;
486 if (!PL_xpviv_root)
487 more_xpviv();
488 xpviv = PL_xpviv_root;
489 PL_xpviv_root = (XPVIV*)xpviv->xpv_pv;
490 UNLOCK_SV_MUTEX;
491 return xpviv;
492}
493
494STATIC void
495S_del_xpviv(pTHX_ XPVIV *p)
496{
497 LOCK_SV_MUTEX;
498 p->xpv_pv = (char*)PL_xpviv_root;
499 PL_xpviv_root = p;
500 UNLOCK_SV_MUTEX;
501}
502
932e9ff9
VB		 503STATIC void
504S_more_xpviv(pTHX)
505{
506 register XPVIV* xpviv;
507 register XPVIV* xpvivend;
612f20c3
GS		 508 New(714, xpviv, 1008/sizeof(XPVIV), XPVIV);
509 xpviv->xpv_pv = (char*)PL_xpviv_arenaroot;
510 PL_xpviv_arenaroot = xpviv;
511
932e9ff9 512 xpvivend = &xpviv[1008 / sizeof(XPVIV) - 1];
612f20c3 513 PL_xpviv_root = ++xpviv;
932e9ff9
VB		 514 while (xpviv < xpvivend) {
515 xpviv->xpv_pv = (char*)(xpviv + 1);
516 xpviv++;
517 }
518 xpviv->xpv_pv = 0;
519}
520
932e9ff9
VB		 521STATIC XPVNV*
522S_new_xpvnv(pTHX)
523{
524 XPVNV* xpvnv;
525 LOCK_SV_MUTEX;
526 if (!PL_xpvnv_root)
527 more_xpvnv();
528 xpvnv = PL_xpvnv_root;
529 PL_xpvnv_root = (XPVNV*)xpvnv->xpv_pv;
530 UNLOCK_SV_MUTEX;
531 return xpvnv;
532}
533
534STATIC void
535S_del_xpvnv(pTHX_ XPVNV *p)
536{
537 LOCK_SV_MUTEX;
538 p->xpv_pv = (char*)PL_xpvnv_root;
539 PL_xpvnv_root = p;
540 UNLOCK_SV_MUTEX;
541}
542
932e9ff9
VB		 543STATIC void
544S_more_xpvnv(pTHX)
545{
546 register XPVNV* xpvnv;
547 register XPVNV* xpvnvend;
612f20c3
GS		 548 New(715, xpvnv, 1008/sizeof(XPVNV), XPVNV);
549 xpvnv->xpv_pv = (char*)PL_xpvnv_arenaroot;
550 PL_xpvnv_arenaroot = xpvnv;
551
932e9ff9 552 xpvnvend = &xpvnv[1008 / sizeof(XPVNV) - 1];
612f20c3 553 PL_xpvnv_root = ++xpvnv;
932e9ff9
VB		 554 while (xpvnv < xpvnvend) {
555 xpvnv->xpv_pv = (char*)(xpvnv + 1);
556 xpvnv++;
557 }
558 xpvnv->xpv_pv = 0;
559}
560
932e9ff9
VB		 561STATIC XPVCV*
562S_new_xpvcv(pTHX)
563{
564 XPVCV* xpvcv;
565 LOCK_SV_MUTEX;
566 if (!PL_xpvcv_root)
567 more_xpvcv();
568 xpvcv = PL_xpvcv_root;
569 PL_xpvcv_root = (XPVCV*)xpvcv->xpv_pv;
570 UNLOCK_SV_MUTEX;
571 return xpvcv;
572}
573
574STATIC void
575S_del_xpvcv(pTHX_ XPVCV *p)
576{
577 LOCK_SV_MUTEX;
578 p->xpv_pv = (char*)PL_xpvcv_root;
579 PL_xpvcv_root = p;
580 UNLOCK_SV_MUTEX;
581}
582
932e9ff9
VB		 583STATIC void
584S_more_xpvcv(pTHX)
585{
586 register XPVCV* xpvcv;
587 register XPVCV* xpvcvend;
612f20c3
GS		 588 New(716, xpvcv, 1008/sizeof(XPVCV), XPVCV);
589 xpvcv->xpv_pv = (char*)PL_xpvcv_arenaroot;
590 PL_xpvcv_arenaroot = xpvcv;
591
932e9ff9 592 xpvcvend = &xpvcv[1008 / sizeof(XPVCV) - 1];
612f20c3 593 PL_xpvcv_root = ++xpvcv;
932e9ff9
VB		 594 while (xpvcv < xpvcvend) {
595 xpvcv->xpv_pv = (char*)(xpvcv + 1);
596 xpvcv++;
597 }
598 xpvcv->xpv_pv = 0;
599}
600
932e9ff9
VB		 601STATIC XPVAV*
602S_new_xpvav(pTHX)
603{
604 XPVAV* xpvav;
605 LOCK_SV_MUTEX;
606 if (!PL_xpvav_root)
607 more_xpvav();
608 xpvav = PL_xpvav_root;
609 PL_xpvav_root = (XPVAV*)xpvav->xav_array;
610 UNLOCK_SV_MUTEX;
611 return xpvav;
612}
613
614STATIC void
615S_del_xpvav(pTHX_ XPVAV *p)
616{
617 LOCK_SV_MUTEX;
618 p->xav_array = (char*)PL_xpvav_root;
619 PL_xpvav_root = p;
620 UNLOCK_SV_MUTEX;
621}
622
932e9ff9
VB		 623STATIC void
624S_more_xpvav(pTHX)
625{
626 register XPVAV* xpvav;
627 register XPVAV* xpvavend;
612f20c3
GS		 628 New(717, xpvav, 1008/sizeof(XPVAV), XPVAV);
629 xpvav->xav_array = (char*)PL_xpvav_arenaroot;
630 PL_xpvav_arenaroot = xpvav;
631
932e9ff9 632 xpvavend = &xpvav[1008 / sizeof(XPVAV) - 1];
612f20c3 633 PL_xpvav_root = ++xpvav;
932e9ff9
VB		 634 while (xpvav < xpvavend) {
635 xpvav->xav_array = (char*)(xpvav + 1);
636 xpvav++;
637 }
638 xpvav->xav_array = 0;
639}
640
932e9ff9
VB		 641STATIC XPVHV*
642S_new_xpvhv(pTHX)
643{
644 XPVHV* xpvhv;
645 LOCK_SV_MUTEX;
646 if (!PL_xpvhv_root)
647 more_xpvhv();
648 xpvhv = PL_xpvhv_root;
649 PL_xpvhv_root = (XPVHV*)xpvhv->xhv_array;
650 UNLOCK_SV_MUTEX;
651 return xpvhv;
652}
653
654STATIC void
655S_del_xpvhv(pTHX_ XPVHV *p)
656{
657 LOCK_SV_MUTEX;
658 p->xhv_array = (char*)PL_xpvhv_root;
659 PL_xpvhv_root = p;
660 UNLOCK_SV_MUTEX;
661}
662
932e9ff9
VB		 663STATIC void
664S_more_xpvhv(pTHX)
665{
666 register XPVHV* xpvhv;
667 register XPVHV* xpvhvend;
612f20c3
GS		 668 New(718, xpvhv, 1008/sizeof(XPVHV), XPVHV);
669 xpvhv->xhv_array = (char*)PL_xpvhv_arenaroot;
670 PL_xpvhv_arenaroot = xpvhv;
671
932e9ff9 672 xpvhvend = &xpvhv[1008 / sizeof(XPVHV) - 1];
612f20c3 673 PL_xpvhv_root = ++xpvhv;
932e9ff9
VB		 674 while (xpvhv < xpvhvend) {
675 xpvhv->xhv_array = (char*)(xpvhv + 1);
676 xpvhv++;
677 }
678 xpvhv->xhv_array = 0;
679}
680
932e9ff9
VB		 681STATIC XPVMG*
682S_new_xpvmg(pTHX)
683{
684 XPVMG* xpvmg;
685 LOCK_SV_MUTEX;
686 if (!PL_xpvmg_root)
687 more_xpvmg();
688 xpvmg = PL_xpvmg_root;
689 PL_xpvmg_root = (XPVMG*)xpvmg->xpv_pv;
690 UNLOCK_SV_MUTEX;
691 return xpvmg;
692}
693
694STATIC void
695S_del_xpvmg(pTHX_ XPVMG *p)
696{
697 LOCK_SV_MUTEX;
698 p->xpv_pv = (char*)PL_xpvmg_root;
699 PL_xpvmg_root = p;
700 UNLOCK_SV_MUTEX;
701}
702
932e9ff9
VB		 703STATIC void
704S_more_xpvmg(pTHX)
705{
706 register XPVMG* xpvmg;
707 register XPVMG* xpvmgend;
612f20c3
GS		 708 New(719, xpvmg, 1008/sizeof(XPVMG), XPVMG);
709 xpvmg->xpv_pv = (char*)PL_xpvmg_arenaroot;
710 PL_xpvmg_arenaroot = xpvmg;
711
932e9ff9 712 xpvmgend = &xpvmg[1008 / sizeof(XPVMG) - 1];
612f20c3 713 PL_xpvmg_root = ++xpvmg;
932e9ff9
VB		 714 while (xpvmg < xpvmgend) {
715 xpvmg->xpv_pv = (char*)(xpvmg + 1);
716 xpvmg++;
717 }
718 xpvmg->xpv_pv = 0;
719}
720
932e9ff9
VB		 721STATIC XPVLV*
722S_new_xpvlv(pTHX)
723{
724 XPVLV* xpvlv;
725 LOCK_SV_MUTEX;
726 if (!PL_xpvlv_root)
727 more_xpvlv();
728 xpvlv = PL_xpvlv_root;
729 PL_xpvlv_root = (XPVLV*)xpvlv->xpv_pv;
730 UNLOCK_SV_MUTEX;
731 return xpvlv;
732}
733
734STATIC void
735S_del_xpvlv(pTHX_ XPVLV *p)
736{
737 LOCK_SV_MUTEX;
738 p->xpv_pv = (char*)PL_xpvlv_root;
739 PL_xpvlv_root = p;
740 UNLOCK_SV_MUTEX;
741}
742
932e9ff9
VB		 743STATIC void
744S_more_xpvlv(pTHX)
745{
746 register XPVLV* xpvlv;
747 register XPVLV* xpvlvend;
612f20c3
GS		 748 New(720, xpvlv, 1008/sizeof(XPVLV), XPVLV);
749 xpvlv->xpv_pv = (char*)PL_xpvlv_arenaroot;
750 PL_xpvlv_arenaroot = xpvlv;
751
932e9ff9 752 xpvlvend = &xpvlv[1008 / sizeof(XPVLV) - 1];
612f20c3 753 PL_xpvlv_root = ++xpvlv;
932e9ff9
VB		 754 while (xpvlv < xpvlvend) {
755 xpvlv->xpv_pv = (char*)(xpvlv + 1);
756 xpvlv++;
757 }
758 xpvlv->xpv_pv = 0;
759}
760
932e9ff9
VB		 761STATIC XPVBM*
762S_new_xpvbm(pTHX)
763{
764 XPVBM* xpvbm;
765 LOCK_SV_MUTEX;
766 if (!PL_xpvbm_root)
767 more_xpvbm();
768 xpvbm = PL_xpvbm_root;
769 PL_xpvbm_root = (XPVBM*)xpvbm->xpv_pv;
770 UNLOCK_SV_MUTEX;
771 return xpvbm;
772}
773
774STATIC void
775S_del_xpvbm(pTHX_ XPVBM *p)
776{
777 LOCK_SV_MUTEX;
778 p->xpv_pv = (char*)PL_xpvbm_root;
779 PL_xpvbm_root = p;
780 UNLOCK_SV_MUTEX;
781}
782
932e9ff9
VB		 783STATIC void
784S_more_xpvbm(pTHX)
785{
786 register XPVBM* xpvbm;
787 register XPVBM* xpvbmend;
612f20c3
GS		 788 New(721, xpvbm, 1008/sizeof(XPVBM), XPVBM);
789 xpvbm->xpv_pv = (char*)PL_xpvbm_arenaroot;
790 PL_xpvbm_arenaroot = xpvbm;
791
932e9ff9 792 xpvbmend = &xpvbm[1008 / sizeof(XPVBM) - 1];
612f20c3 793 PL_xpvbm_root = ++xpvbm;
932e9ff9
VB		 794 while (xpvbm < xpvbmend) {
795 xpvbm->xpv_pv = (char*)(xpvbm + 1);
796 xpvbm++;
797 }
798 xpvbm->xpv_pv = 0;
799}
800
d33b2eba
GS		 801#ifdef LEAKTEST
802# define my_safemalloc(s) (void*)safexmalloc(717,s)
803# define my_safefree(p) safexfree((char*)p)
804#else
805# define my_safemalloc(s) (void*)safemalloc(s)
806# define my_safefree(p) safefree((char*)p)
807#endif
463ee0b2 808
d33b2eba 809#ifdef PURIFY
463ee0b2 810
d33b2eba
GS		 811#define new_XIV() my_safemalloc(sizeof(XPVIV))
812#define del_XIV(p) my_safefree(p)
ed6116ce 813
d33b2eba
GS		 814#define new_XNV() my_safemalloc(sizeof(XPVNV))
815#define del_XNV(p) my_safefree(p)
463ee0b2 816
d33b2eba
GS		 817#define new_XRV() my_safemalloc(sizeof(XRV))
818#define del_XRV(p) my_safefree(p)
8c52afec 819
d33b2eba
GS		 820#define new_XPV() my_safemalloc(sizeof(XPV))
821#define del_XPV(p) my_safefree(p)
9b94d1dd 822
d33b2eba
GS		 823#define new_XPVIV() my_safemalloc(sizeof(XPVIV))
824#define del_XPVIV(p) my_safefree(p)
932e9ff9 825
d33b2eba
GS		 826#define new_XPVNV() my_safemalloc(sizeof(XPVNV))
827#define del_XPVNV(p) my_safefree(p)
932e9ff9 828
d33b2eba
GS		 829#define new_XPVCV() my_safemalloc(sizeof(XPVCV))
830#define del_XPVCV(p) my_safefree(p)
932e9ff9 831
d33b2eba
GS		 832#define new_XPVAV() my_safemalloc(sizeof(XPVAV))
833#define del_XPVAV(p) my_safefree(p)
834
835#define new_XPVHV() my_safemalloc(sizeof(XPVHV))
836#define del_XPVHV(p) my_safefree(p)
1c846c1f 837
d33b2eba
GS		 838#define new_XPVMG() my_safemalloc(sizeof(XPVMG))
839#define del_XPVMG(p) my_safefree(p)
840
841#define new_XPVLV() my_safemalloc(sizeof(XPVLV))
842#define del_XPVLV(p) my_safefree(p)
843
844#define new_XPVBM() my_safemalloc(sizeof(XPVBM))
845#define del_XPVBM(p) my_safefree(p)
846
847#else /* !PURIFY */
848
849#define new_XIV() (void*)new_xiv()
850#define del_XIV(p) del_xiv((XPVIV*) p)
851
852#define new_XNV() (void*)new_xnv()
853#define del_XNV(p) del_xnv((XPVNV*) p)
9b94d1dd 854
d33b2eba
GS		 855#define new_XRV() (void*)new_xrv()
856#define del_XRV(p) del_xrv((XRV*) p)
9b94d1dd 857
d33b2eba
GS		 858#define new_XPV() (void*)new_xpv()
859#define del_XPV(p) del_xpv((XPV *)p)
860
861#define new_XPVIV() (void*)new_xpviv()
862#define del_XPVIV(p) del_xpviv((XPVIV *)p)
863
864#define new_XPVNV() (void*)new_xpvnv()
865#define del_XPVNV(p) del_xpvnv((XPVNV *)p)
866
867#define new_XPVCV() (void*)new_xpvcv()
868#define del_XPVCV(p) del_xpvcv((XPVCV *)p)
869
870#define new_XPVAV() (void*)new_xpvav()
871#define del_XPVAV(p) del_xpvav((XPVAV *)p)
872
873#define new_XPVHV() (void*)new_xpvhv()
874#define del_XPVHV(p) del_xpvhv((XPVHV *)p)
1c846c1f 875
d33b2eba
GS		 876#define new_XPVMG() (void*)new_xpvmg()
877#define del_XPVMG(p) del_xpvmg((XPVMG *)p)
878
879#define new_XPVLV() (void*)new_xpvlv()
880#define del_XPVLV(p) del_xpvlv((XPVLV *)p)
881
882#define new_XPVBM() (void*)new_xpvbm()
883#define del_XPVBM(p) del_xpvbm((XPVBM *)p)
884
885#endif /* PURIFY */
9b94d1dd 886
d33b2eba
GS		 887#define new_XPVGV() my_safemalloc(sizeof(XPVGV))
888#define del_XPVGV(p) my_safefree(p)
1c846c1f 889
d33b2eba
GS		 890#define new_XPVFM() my_safemalloc(sizeof(XPVFM))
891#define del_XPVFM(p) my_safefree(p)
1c846c1f 892
d33b2eba
GS		 893#define new_XPVIO() my_safemalloc(sizeof(XPVIO))
894#define del_XPVIO(p) my_safefree(p)
8990e307 895
954c1994
GS		 896/*
897=for apidoc sv_upgrade
898
899Upgrade an SV to a more complex form. Use C<SvUPGRADE>. See
900C<svtype>.
901
902=cut
903*/
904
79072805 905bool
864dbfa3 906Perl_sv_upgrade(pTHX_ register SV *sv, U32 mt)
79072805
LW		 907{
908 char* pv;
909 U32 cur;
910 U32 len;
a0d0e21e 911 IV iv;
65202027 912 NV nv;
79072805
LW		 913 MAGIC* magic;
914 HV* stash;
915
f130fd45
NIS		 916 if (mt != SVt_PV && SvREADONLY(sv) && SvFAKE(sv)) {
917 sv_force_normal(sv);
918 }
919
79072805
LW		 920 if (SvTYPE(sv) == mt)
921 return TRUE;
922
a5f75d66
AD		 923 if (mt < SVt_PVIV)
924 (void)SvOOK_off(sv);
925
79072805
LW		 926 switch (SvTYPE(sv)) {
927 case SVt_NULL:
928 pv = 0;
929 cur = 0;
930 len = 0;
931 iv = 0;
932 nv = 0.0;
933 magic = 0;
934 stash = 0;
935 break;
79072805
LW		 936 case SVt_IV:
937 pv = 0;
938 cur = 0;
939 len = 0;
463ee0b2 940 iv = SvIVX(sv);
65202027 941 nv = (NV)SvIVX(sv);
79072805
LW		 942 del_XIV(SvANY(sv));
943 magic = 0;
944 stash = 0;
ed6116ce 945 if (mt == SVt_NV)
463ee0b2 946 mt = SVt_PVNV;
ed6116ce
LW		 947 else if (mt < SVt_PVIV)
948 mt = SVt_PVIV;
79072805
LW		 949 break;
950 case SVt_NV:
951 pv = 0;
952 cur = 0;
953 len = 0;
463ee0b2 954 nv = SvNVX(sv);
1bd302c3 955 iv = I_V(nv);
79072805
LW		 956 magic = 0;
957 stash = 0;
958 del_XNV(SvANY(sv));
959 SvANY(sv) = 0;
ed6116ce 960 if (mt < SVt_PVNV)
79072805
LW		 961 mt = SVt_PVNV;
962 break;
ed6116ce
LW		 963 case SVt_RV:
964 pv = (char*)SvRV(sv);
965 cur = 0;
966 len = 0;
56431972
RB		 967 iv = PTR2IV(pv);
968 nv = PTR2NV(pv);
ed6116ce
LW		 969 del_XRV(SvANY(sv));
970 magic = 0;
971 stash = 0;
972 break;
79072805 973 case SVt_PV:
463ee0b2 974 pv = SvPVX(sv);
79072805
LW		 975 cur = SvCUR(sv);
976 len = SvLEN(sv);
977 iv = 0;
978 nv = 0.0;
979 magic = 0;
980 stash = 0;
981 del_XPV(SvANY(sv));
748a9306
LW		 982 if (mt <= SVt_IV)
983 mt = SVt_PVIV;
984 else if (mt == SVt_NV)
985 mt = SVt_PVNV;
79072805
LW		 986 break;
987 case SVt_PVIV:
463ee0b2 988 pv = SvPVX(sv);
79072805
LW		 989 cur = SvCUR(sv);
990 len = SvLEN(sv);
463ee0b2 991 iv = SvIVX(sv);
79072805
LW		 992 nv = 0.0;
993 magic = 0;
994 stash = 0;
995 del_XPVIV(SvANY(sv));
996 break;
997 case SVt_PVNV:
463ee0b2 998 pv = SvPVX(sv);
79072805
LW		 999 cur = SvCUR(sv);
1000 len = SvLEN(sv);
463ee0b2
LW		 1001 iv = SvIVX(sv);
1002 nv = SvNVX(sv);
79072805
LW		 1003 magic = 0;
1004 stash = 0;
1005 del_XPVNV(SvANY(sv));
1006 break;
1007 case SVt_PVMG:
463ee0b2 1008 pv = SvPVX(sv);
79072805
LW		 1009 cur = SvCUR(sv);
1010 len = SvLEN(sv);
463ee0b2
LW		 1011 iv = SvIVX(sv);
1012 nv = SvNVX(sv);
79072805
LW		 1013 magic = SvMAGIC(sv);
1014 stash = SvSTASH(sv);
1015 del_XPVMG(SvANY(sv));
1016 break;
1017 default:
cea2e8a9 1018 Perl_croak(aTHX_ "Can't upgrade that kind of scalar");
79072805
LW		 1019 }
1020
1021 switch (mt) {
1022 case SVt_NULL:
cea2e8a9 1023 Perl_croak(aTHX_ "Can't upgrade to undef");
79072805
LW		 1024 case SVt_IV:
1025 SvANY(sv) = new_XIV();
463ee0b2 1026 SvIVX(sv) = iv;
79072805
LW		 1027 break;
1028 case SVt_NV:
1029 SvANY(sv) = new_XNV();
463ee0b2 1030 SvNVX(sv) = nv;
79072805 1031 break;
ed6116ce
LW		 1032 case SVt_RV:
1033 SvANY(sv) = new_XRV();
1034 SvRV(sv) = (SV*)pv;
ed6116ce 1035 break;
79072805
LW		 1036 case SVt_PV:
1037 SvANY(sv) = new_XPV();
463ee0b2 1038 SvPVX(sv) = pv;
79072805
LW		 1039 SvCUR(sv) = cur;
1040 SvLEN(sv) = len;
1041 break;
1042 case SVt_PVIV:
1043 SvANY(sv) = new_XPVIV();
463ee0b2 1044 SvPVX(sv) = pv;
79072805
LW		 1045 SvCUR(sv) = cur;
1046 SvLEN(sv) = len;
463ee0b2 1047 SvIVX(sv) = iv;
79072805 1048 if (SvNIOK(sv))
a0d0e21e 1049 (void)SvIOK_on(sv);
79072805
LW		 1050 SvNOK_off(sv);
1051 break;
1052 case SVt_PVNV:
1053 SvANY(sv) = new_XPVNV();
463ee0b2 1054 SvPVX(sv) = pv;
79072805
LW		 1055 SvCUR(sv) = cur;
1056 SvLEN(sv) = len;
463ee0b2
LW		 1057 SvIVX(sv) = iv;
1058 SvNVX(sv) = nv;
79072805
LW		 1059 break;
1060 case SVt_PVMG:
1061 SvANY(sv) = new_XPVMG();
463ee0b2 1062 SvPVX(sv) = pv;
79072805
LW		 1063 SvCUR(sv) = cur;
1064 SvLEN(sv) = len;
463ee0b2
LW		 1065 SvIVX(sv) = iv;
1066 SvNVX(sv) = nv;
79072805
LW		 1067 SvMAGIC(sv) = magic;
1068 SvSTASH(sv) = stash;
1069 break;
1070 case SVt_PVLV:
1071 SvANY(sv) = new_XPVLV();
463ee0b2 1072 SvPVX(sv) = pv;
79072805
LW		 1073 SvCUR(sv) = cur;
1074 SvLEN(sv) = len;
463ee0b2
LW		 1075 SvIVX(sv) = iv;
1076 SvNVX(sv) = nv;
79072805
LW		 1077 SvMAGIC(sv) = magic;
1078 SvSTASH(sv) = stash;
1079 LvTARGOFF(sv) = 0;
1080 LvTARGLEN(sv) = 0;
1081 LvTARG(sv) = 0;
1082 LvTYPE(sv) = 0;
1083 break;
1084 case SVt_PVAV:
1085 SvANY(sv) = new_XPVAV();
463ee0b2
LW		 1086 if (pv)
1087 Safefree(pv);
2304df62 1088 SvPVX(sv) = 0;
d1bf51dd 1089 AvMAX(sv) = -1;
93965878 1090 AvFILLp(sv) = -1;
463ee0b2
LW		 1091 SvIVX(sv) = 0;
1092 SvNVX(sv) = 0.0;
1093 SvMAGIC(sv) = magic;
1094 SvSTASH(sv) = stash;
1095 AvALLOC(sv) = 0;
79072805
LW		 1096 AvARYLEN(sv) = 0;
1097 AvFLAGS(sv) = 0;
1098 break;
1099 case SVt_PVHV:
1100 SvANY(sv) = new_XPVHV();
463ee0b2
LW		 1101 if (pv)
1102 Safefree(pv);
1103 SvPVX(sv) = 0;
1104 HvFILL(sv) = 0;
1105 HvMAX(sv) = 0;
1106 HvKEYS(sv) = 0;
1107 SvNVX(sv) = 0.0;
79072805
LW		 1108 SvMAGIC(sv) = magic;
1109 SvSTASH(sv) = stash;
79072805
LW		 1110 HvRITER(sv) = 0;
1111 HvEITER(sv) = 0;
1112 HvPMROOT(sv) = 0;
1113 HvNAME(sv) = 0;
79072805
LW		 1114 break;
1115 case SVt_PVCV:
1116 SvANY(sv) = new_XPVCV();
748a9306 1117 Zero(SvANY(sv), 1, XPVCV);
463ee0b2 1118 SvPVX(sv) = pv;
79072805
LW		 1119 SvCUR(sv) = cur;
1120 SvLEN(sv) = len;
463ee0b2
LW		 1121 SvIVX(sv) = iv;
1122 SvNVX(sv) = nv;
79072805
LW		 1123 SvMAGIC(sv) = magic;
1124 SvSTASH(sv) = stash;
79072805
LW		 1125 break;
1126 case SVt_PVGV:
1127 SvANY(sv) = new_XPVGV();
463ee0b2 1128 SvPVX(sv) = pv;
79072805
LW		 1129 SvCUR(sv) = cur;
1130 SvLEN(sv) = len;
463ee0b2
LW		 1131 SvIVX(sv) = iv;
1132 SvNVX(sv) = nv;
79072805
LW		 1133 SvMAGIC(sv) = magic;
1134 SvSTASH(sv) = stash;
93a17b20 1135 GvGP(sv) = 0;
79072805
LW		 1136 GvNAME(sv) = 0;
1137 GvNAMELEN(sv) = 0;
1138 GvSTASH(sv) = 0;
a5f75d66 1139 GvFLAGS(sv) = 0;
79072805
LW		 1140 break;
1141 case SVt_PVBM:
1142 SvANY(sv) = new_XPVBM();
463ee0b2 1143 SvPVX(sv) = pv;
79072805
LW		 1144 SvCUR(sv) = cur;
1145 SvLEN(sv) = len;
463ee0b2
LW		 1146 SvIVX(sv) = iv;
1147 SvNVX(sv) = nv;
79072805
LW		 1148 SvMAGIC(sv) = magic;
1149 SvSTASH(sv) = stash;
1150 BmRARE(sv) = 0;
1151 BmUSEFUL(sv) = 0;
1152 BmPREVIOUS(sv) = 0;
1153 break;
1154 case SVt_PVFM:
1155 SvANY(sv) = new_XPVFM();
748a9306 1156 Zero(SvANY(sv), 1, XPVFM);
463ee0b2 1157 SvPVX(sv) = pv;
79072805
LW		 1158 SvCUR(sv) = cur;
1159 SvLEN(sv) = len;
463ee0b2
LW		 1160 SvIVX(sv) = iv;
1161 SvNVX(sv) = nv;
79072805
LW		 1162 SvMAGIC(sv) = magic;
1163 SvSTASH(sv) = stash;
79072805 1164 break;
8990e307
LW		 1165 case SVt_PVIO:
1166 SvANY(sv) = new_XPVIO();
748a9306 1167 Zero(SvANY(sv), 1, XPVIO);
8990e307
LW		 1168 SvPVX(sv) = pv;
1169 SvCUR(sv) = cur;
1170 SvLEN(sv) = len;
1171 SvIVX(sv) = iv;
1172 SvNVX(sv) = nv;
1173 SvMAGIC(sv) = magic;
1174 SvSTASH(sv) = stash;
85e6fe83 1175 IoPAGE_LEN(sv) = 60;
8990e307
LW		 1176 break;
1177 }
1178 SvFLAGS(sv) &= ~SVTYPEMASK;
1179 SvFLAGS(sv) |= mt;
79072805
LW		 1180 return TRUE;
1181}
1182
79072805 1183int
864dbfa3 1184Perl_sv_backoff(pTHX_ register SV *sv)
79072805
LW		 1185{
1186 assert(SvOOK(sv));
463ee0b2
LW		 1187 if (SvIVX(sv)) {
1188 char *s = SvPVX(sv);
1189 SvLEN(sv) += SvIVX(sv);
1190 SvPVX(sv) -= SvIVX(sv);
79072805 1191 SvIV_set(sv, 0);
463ee0b2 1192 Move(s, SvPVX(sv), SvCUR(sv)+1, char);
79072805
LW		 1193 }
1194 SvFLAGS(sv) &= ~SVf_OOK;
a0d0e21e 1195 return 0;
79072805
LW		 1196}
1197
954c1994
GS		 1198/*
1199=for apidoc sv_grow
1200
1201Expands the character buffer in the SV. This will use C<sv_unref> and will
1202upgrade the SV to C<SVt_PV>. Returns a pointer to the character buffer.
1203Use C<SvGROW>.
1204
1205=cut
1206*/
1207
79072805 1208char *
864dbfa3 1209Perl_sv_grow(pTHX_ register SV *sv, register STRLEN newlen)
79072805
LW		 1210{
1211 register char *s;
1212
55497cff 1213#ifdef HAS_64K_LIMIT
79072805 1214 if (newlen >= 0x10000) {
1d7c1841
GS		 1215 PerlIO_printf(Perl_debug_log,
1216 "Allocation too large: %"UVxf"\n", (UV)newlen);
79072805
LW		 1217 my_exit(1);
1218 }
55497cff 1219#endif /* HAS_64K_LIMIT */
a0d0e21e
LW		 1220 if (SvROK(sv))
1221 sv_unref(sv);
79072805
LW		 1222 if (SvTYPE(sv) < SVt_PV) {
1223 sv_upgrade(sv, SVt_PV);
463ee0b2 1224 s = SvPVX(sv);
79072805
LW		 1225 }
1226 else if (SvOOK(sv)) { /* pv is offset? */
1227 sv_backoff(sv);
463ee0b2 1228 s = SvPVX(sv);
79072805
LW		 1229 if (newlen > SvLEN(sv))
1230 newlen += 10 * (newlen - SvCUR(sv)); /* avoid copy each time */
c6f8c383
GA		 1231#ifdef HAS_64K_LIMIT
1232 if (newlen >= 0x10000)
1233 newlen = 0xFFFF;
1234#endif
79072805
LW		 1235 }
1236 else
463ee0b2 1237 s = SvPVX(sv);
79072805 1238 if (newlen > SvLEN(sv)) { /* need more room? */
8d6dde3e 1239 if (SvLEN(sv) && s) {
f5a32c7f 1240#if defined(MYMALLOC) && !defined(LEAKTEST)
8d6dde3e
IZ		 1241 STRLEN l = malloced_size((void*)SvPVX(sv));
1242 if (newlen <= l) {
1243 SvLEN_set(sv, l);
1244 return s;
1245 } else
c70c8a0a 1246#endif
79072805 1247 Renew(s,newlen,char);
8d6dde3e 1248 }
79072805
LW		 1249 else
1250 New(703,s,newlen,char);
1251 SvPV_set(sv, s);
1252 SvLEN_set(sv, newlen);
1253 }
1254 return s;
1255}
1256
954c1994
GS		 1257/*
1258=for apidoc sv_setiv
1259
1260Copies an integer into the given SV. Does not handle 'set' magic. See
1261C<sv_setiv_mg>.
1262
1263=cut
1264*/
1265
79072805 1266void
864dbfa3 1267Perl_sv_setiv(pTHX_ register SV *sv, IV i)
79072805 1268{
2213622d 1269 SV_CHECK_THINKFIRST(sv);
463ee0b2
LW		 1270 switch (SvTYPE(sv)) {
1271 case SVt_NULL:
79072805 1272 sv_upgrade(sv, SVt_IV);
463ee0b2
LW		 1273 break;
1274 case SVt_NV:
1275 sv_upgrade(sv, SVt_PVNV);
1276 break;
ed6116ce 1277 case SVt_RV:
463ee0b2 1278 case SVt_PV:
79072805 1279 sv_upgrade(sv, SVt_PVIV);
463ee0b2 1280 break;
a0d0e21e
LW		 1281
1282 case SVt_PVGV:
a0d0e21e
LW		 1283 case SVt_PVAV:
1284 case SVt_PVHV:
1285 case SVt_PVCV:
1286 case SVt_PVFM:
1287 case SVt_PVIO:
11343788
MB		 1288 {
1289 dTHR;
cea2e8a9 1290 Perl_croak(aTHX_ "Can't coerce %s to integer in %s", sv_reftype(sv,0),
22c35a8c 1291 PL_op_desc[PL_op->op_type]);
11343788 1292 }
463ee0b2 1293 }
a0d0e21e 1294 (void)SvIOK_only(sv); /* validate number */
a5f75d66 1295 SvIVX(sv) = i;
463ee0b2 1296 SvTAINT(sv);
79072805
LW		 1297}
1298
954c1994
GS		 1299/*
1300=for apidoc sv_setiv_mg
1301
1302Like C<sv_setiv>, but also handles 'set' magic.
1303
1304=cut
1305*/
1306
79072805 1307void
864dbfa3 1308Perl_sv_setiv_mg(pTHX_ register SV *sv, IV i)
ef50df4b
GS		 1309{
1310 sv_setiv(sv,i);
1311 SvSETMAGIC(sv);
1312}
1313
954c1994
GS		 1314/*
1315=for apidoc sv_setuv
1316
1317Copies an unsigned integer into the given SV. Does not handle 'set' magic.
1318See C<sv_setuv_mg>.
1319
1320=cut
1321*/
1322
ef50df4b 1323void
864dbfa3 1324Perl_sv_setuv(pTHX_ register SV *sv, UV u)
55497cff 1325{
25da4f38
IZ		 1326 sv_setiv(sv, 0);
1327 SvIsUV_on(sv);
1328 SvUVX(sv) = u;
55497cff 1329}
1330
954c1994
GS		 1331/*
1332=for apidoc sv_setuv_mg
1333
1334Like C<sv_setuv>, but also handles 'set' magic.
1335
1336=cut
1337*/
1338
55497cff 1339void
864dbfa3 1340Perl_sv_setuv_mg(pTHX_ register SV *sv, UV u)
ef50df4b
GS		 1341{
1342 sv_setuv(sv,u);
1343 SvSETMAGIC(sv);
1344}
1345
954c1994
GS		 1346/*
1347=for apidoc sv_setnv
1348
1349Copies a double into the given SV. Does not handle 'set' magic. See
1350C<sv_setnv_mg>.
1351
1352=cut
1353*/
1354
ef50df4b 1355void
65202027 1356Perl_sv_setnv(pTHX_ register SV *sv, NV num)
79072805 1357{
2213622d 1358 SV_CHECK_THINKFIRST(sv);
a0d0e21e
LW		 1359 switch (SvTYPE(sv)) {
1360 case SVt_NULL:
1361 case SVt_IV:
79072805 1362 sv_upgrade(sv, SVt_NV);
a0d0e21e 1363 break;
a0d0e21e
LW		 1364 case SVt_RV:
1365 case SVt_PV:
1366 case SVt_PVIV:
79072805 1367 sv_upgrade(sv, SVt_PVNV);
a0d0e21e 1368 break;
827b7e14 1369
a0d0e21e 1370 case SVt_PVGV:
a0d0e21e
LW		 1371 case SVt_PVAV:
1372 case SVt_PVHV:
1373 case SVt_PVCV:
1374 case SVt_PVFM:
1375 case SVt_PVIO:
11343788
MB		 1376 {
1377 dTHR;
cea2e8a9 1378 Perl_croak(aTHX_ "Can't coerce %s to number in %s", sv_reftype(sv,0),
22c35a8c 1379 PL_op_name[PL_op->op_type]);
11343788 1380 }
79072805 1381 }
463ee0b2 1382 SvNVX(sv) = num;
a0d0e21e 1383 (void)SvNOK_only(sv); /* validate number */
463ee0b2 1384 SvTAINT(sv);
79072805
LW		 1385}
1386
954c1994
GS		 1387/*
1388=for apidoc sv_setnv_mg
1389
1390Like C<sv_setnv>, but also handles 'set' magic.
1391
1392=cut
1393*/
1394
ef50df4b 1395void
65202027 1396Perl_sv_setnv_mg(pTHX_ register SV *sv, NV num)
ef50df4b
GS		 1397{
1398 sv_setnv(sv,num);
1399 SvSETMAGIC(sv);
1400}
1401
76e3520e 1402STATIC void
cea2e8a9 1403S_not_a_number(pTHX_ SV *sv)
a0d0e21e 1404{
11343788 1405 dTHR;
a0d0e21e
LW		 1406 char tmpbuf[64];
1407 char *d = tmpbuf;
1408 char *s;
dc28f22b
GA		 1409 char *limit = tmpbuf + sizeof(tmpbuf) - 8;
1410 /* each *s can expand to 4 chars + "...\0",
1411 i.e. need room for 8 chars */
a0d0e21e 1412
dc28f22b 1413 for (s = SvPVX(sv); *s && d < limit; s++) {
bbce6d69 1414 int ch = *s & 0xFF;
1415 if (ch & 128 && !isPRINT_LC(ch)) {
a0d0e21e
LW		 1416 *d++ = 'M';
1417 *d++ = '-';
1418 ch &= 127;
1419 }
bbce6d69 1420 if (ch == '\n') {
1421 *d++ = '\\';
1422 *d++ = 'n';
1423 }
1424 else if (ch == '\r') {
1425 *d++ = '\\';
1426 *d++ = 'r';
1427 }
1428 else if (ch == '\f') {
1429 *d++ = '\\';
1430 *d++ = 'f';
1431 }
1432 else if (ch == '\\') {
1433 *d++ = '\\';
1434 *d++ = '\\';
1435 }
1436 else if (isPRINT_LC(ch))
a0d0e21e
LW		 1437 *d++ = ch;
1438 else {
1439 *d++ = '^';
bbce6d69 1440 *d++ = toCTRL(ch);
a0d0e21e
LW		 1441 }
1442 }
1443 if (*s) {
1444 *d++ = '.';
1445 *d++ = '.';
1446 *d++ = '.';
1447 }
1448 *d = '\0';
1449
533c011a 1450 if (PL_op)
42d38218
MS		 1451 Perl_warner(aTHX_ WARN_NUMERIC,
1452 "Argument \"%s\" isn't numeric in %s", tmpbuf,
1453 PL_op_desc[PL_op->op_type]);
a0d0e21e 1454 else
42d38218
MS		 1455 Perl_warner(aTHX_ WARN_NUMERIC,
1456 "Argument \"%s\" isn't numeric", tmpbuf);
a0d0e21e
LW		 1457}
1458
cf2093f6 1459/* the number can be converted to integer with atol() or atoll() */
25da4f38
IZ		 1460#define IS_NUMBER_TO_INT_BY_ATOL 0x01
1461#define IS_NUMBER_TO_INT_BY_ATOF 0x02 /* atol() may be != atof() */
1462#define IS_NUMBER_NOT_IV 0x04 /* (IV)atof() may be != atof() */
1463#define IS_NUMBER_NEG 0x08 /* not good to cache UV */
300aed98 1464#define IS_NUMBER_INFINITY 0x10 /* this is big */
25da4f38
IZ		 1465
1466/* Actually, ISO C leaves conversion of UV to IV undefined, but
1467 until proven guilty, assume that things are not that bad... */
1468
a0d0e21e 1469IV
864dbfa3 1470Perl_sv_2iv(pTHX_ register SV *sv)
79072805
LW		 1471{
1472 if (!sv)
1473 return 0;
8990e307 1474 if (SvGMAGICAL(sv)) {
463ee0b2
LW		 1475 mg_get(sv);
1476 if (SvIOKp(sv))
1477 return SvIVX(sv);
748a9306 1478 if (SvNOKp(sv)) {
25da4f38 1479 return I_V(SvNVX(sv));
748a9306 1480 }
36477c24 1481 if (SvPOKp(sv) && SvLEN(sv))
1482 return asIV(sv);
3fe9a6f1 1483 if (!SvROK(sv)) {
d008e5eb 1484 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
c6ee37c5 1485 dTHR;
d008e5eb 1486 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 1487 report_uninit();
c6ee37c5 1488 }
36477c24 1489 return 0;
3fe9a6f1 1490 }
463ee0b2 1491 }
ed6116ce 1492 if (SvTHINKFIRST(sv)) {
a0d0e21e 1493 if (SvROK(sv)) {
a0d0e21e 1494 SV* tmpstr;
1554e226
DC		 1495 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
1496 (SvRV(tmpstr) != SvRV(sv)))
9e7bc3e8 1497 return SvIV(tmpstr);
56431972 1498 return PTR2IV(SvRV(sv));
a0d0e21e 1499 }
47deb5e7
NIS		 1500 if (SvREADONLY(sv) && SvFAKE(sv)) {
1501 sv_force_normal(sv);
1502 }
0336b60e
IZ		 1503 if (SvREADONLY(sv) && !SvOK(sv)) {
1504 dTHR;
1505 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 1506 report_uninit();
ed6116ce
LW		 1507 return 0;
1508 }
79072805 1509 }
25da4f38
IZ		 1510 if (SvIOKp(sv)) {
1511 if (SvIsUV(sv)) {
1512 return (IV)(SvUVX(sv));
1513 }
1514 else {
1515 return SvIVX(sv);
1516 }
463ee0b2 1517 }
748a9306 1518 if (SvNOKp(sv)) {
25da4f38
IZ		 1519 /* We can cache the IV/UV value even if it not good enough
1520 * to reconstruct NV, since the conversion to PV will prefer
cf2093f6 1521 * NV over IV/UV.
25da4f38
IZ		 1522 */
1523
1524 if (SvTYPE(sv) == SVt_NV)
1525 sv_upgrade(sv, SVt_PVNV);
1526
a5f75d66 1527 (void)SvIOK_on(sv);
65202027 1528 if (SvNVX(sv) < (NV)IV_MAX + 0.5)
748a9306 1529 SvIVX(sv) = I_V(SvNVX(sv));
25da4f38 1530 else {
ff68c719 1531 SvUVX(sv) = U_V(SvNVX(sv));
25da4f38
IZ		 1532 SvIsUV_on(sv);
1533 ret_iv_max:
1c846c1f 1534 DEBUG_c(PerlIO_printf(Perl_debug_log,
57def98f 1535 "0x%"UVxf" 2iv(%"UVuf" => %"IVdf") (as unsigned)\n",
56431972 1536 PTR2UV(sv),
57def98f
JH		 1537 SvUVX(sv),
1538 SvUVX(sv)));
25da4f38
IZ		 1539 return (IV)SvUVX(sv);
1540 }
748a9306
LW		 1541 }
1542 else if (SvPOKp(sv) && SvLEN(sv)) {
25da4f38
IZ		 1543 I32 numtype = looks_like_number(sv);
1544
1545 /* We want to avoid a possible problem when we cache an IV which
1546 may be later translated to an NV, and the resulting NV is not
1547 the translation of the initial data.
1c846c1f 1548
25da4f38
IZ		 1549 This means that if we cache such an IV, we need to cache the
1550 NV as well. Moreover, we trade speed for space, and do not
1551 cache the NV if not needed.
1552 */
1553 if (numtype & IS_NUMBER_NOT_IV) {
1554 /* May be not an integer. Need to cache NV if we cache IV
1555 * - otherwise future conversion to NV will be wrong. */
65202027 1556 NV d;
25da4f38 1557
097ee67d 1558 d = Atof(SvPVX(sv));
25da4f38
IZ		 1559
1560 if (SvTYPE(sv) < SVt_PVNV)
1561 sv_upgrade(sv, SVt_PVNV);
1562 SvNVX(sv) = d;
1563 (void)SvNOK_on(sv);
1564 (void)SvIOK_on(sv);
65202027 1565#if defined(USE_LONG_DOUBLE)
1d7c1841
GS		 1566 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
1567 PTR2UV(sv), SvNVX(sv)));
65202027 1568#else
1d7c1841
GS		 1569 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%g)\n",
1570 PTR2UV(sv), SvNVX(sv)));
65202027 1571#endif
65202027 1572 if (SvNVX(sv) < (NV)IV_MAX + 0.5)
25da4f38
IZ		 1573 SvIVX(sv) = I_V(SvNVX(sv));
1574 else {
1575 SvUVX(sv) = U_V(SvNVX(sv));
1576 SvIsUV_on(sv);
1577 goto ret_iv_max;
1578 }
1579 }
0a3ece55
MG		 1580 else { /* The NV may be reconstructed from IV - safe to cache IV,
1581 which may be calculated by atol(). */
25da4f38
IZ		 1582 if (SvTYPE(sv) < SVt_PVIV)
1583 sv_upgrade(sv, SVt_PVIV);
25da4f38 1584 (void)SvIOK_on(sv);
0a3ece55
MG		 1585 SvIVX(sv) = Atol(SvPVX(sv));
1586 if (! numtype && ckWARN(WARN_NUMERIC))
25da4f38
IZ		 1587 not_a_number(sv);
1588 }
93a17b20 1589 }
79072805 1590 else {
11343788 1591 dTHR;
599cee73 1592 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
1d7c1841 1593 report_uninit();
25da4f38
IZ		 1594 if (SvTYPE(sv) < SVt_IV)
1595 /* Typically the caller expects that sv_any is not NULL now. */
1596 sv_upgrade(sv, SVt_IV);
a0d0e21e 1597 return 0;
79072805 1598 }
1d7c1841
GS		 1599 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"IVdf")\n",
1600 PTR2UV(sv),SvIVX(sv)));
25da4f38 1601 return SvIsUV(sv) ? (IV)SvUVX(sv) : SvIVX(sv);
79072805
LW		 1602}
1603
ff68c719 1604UV
864dbfa3 1605Perl_sv_2uv(pTHX_ register SV *sv)
ff68c719 1606{
1607 if (!sv)
1608 return 0;
1609 if (SvGMAGICAL(sv)) {
1610 mg_get(sv);
1611 if (SvIOKp(sv))
1612 return SvUVX(sv);
1613 if (SvNOKp(sv))
1614 return U_V(SvNVX(sv));
36477c24 1615 if (SvPOKp(sv) && SvLEN(sv))
1616 return asUV(sv);
3fe9a6f1 1617 if (!SvROK(sv)) {
d008e5eb 1618 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
c6ee37c5 1619 dTHR;
d008e5eb 1620 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 1621 report_uninit();
c6ee37c5 1622 }
36477c24 1623 return 0;
3fe9a6f1 1624 }
ff68c719 1625 }
1626 if (SvTHINKFIRST(sv)) {
1627 if (SvROK(sv)) {
ff68c719 1628 SV* tmpstr;
1554e226
DC		 1629 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
1630 (SvRV(tmpstr) != SvRV(sv)))
9e7bc3e8 1631 return SvUV(tmpstr);
56431972 1632 return PTR2UV(SvRV(sv));
ff68c719 1633 }
0336b60e
IZ		 1634 if (SvREADONLY(sv) && !SvOK(sv)) {
1635 dTHR;
1636 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 1637 report_uninit();
ff68c719 1638 return 0;
1639 }
1640 }
25da4f38
IZ		 1641 if (SvIOKp(sv)) {
1642 if (SvIsUV(sv)) {
1643 return SvUVX(sv);
1644 }
1645 else {
1646 return (UV)SvIVX(sv);
1647 }
ff68c719 1648 }
1649 if (SvNOKp(sv)) {
25da4f38
IZ		 1650 /* We can cache the IV/UV value even if it not good enough
1651 * to reconstruct NV, since the conversion to PV will prefer
cf2093f6 1652 * NV over IV/UV.
25da4f38
IZ		 1653 */
1654 if (SvTYPE(sv) == SVt_NV)
1655 sv_upgrade(sv, SVt_PVNV);
ff68c719 1656 (void)SvIOK_on(sv);
25da4f38
IZ		 1657 if (SvNVX(sv) >= -0.5) {
1658 SvIsUV_on(sv);
1659 SvUVX(sv) = U_V(SvNVX(sv));
1660 }
1661 else {
1662 SvIVX(sv) = I_V(SvNVX(sv));
1663 ret_zero:
1c846c1f 1664 DEBUG_c(PerlIO_printf(Perl_debug_log,
07270b1a 1665 "0x%"UVxf" 2uv(%"IVdf" => %"IVdf") (as signed)\n",
57def98f
JH		 1666 PTR2UV(sv),
1667 SvIVX(sv),
1668 (IV)(UV)SvIVX(sv)));
25da4f38
IZ		 1669 return (UV)SvIVX(sv);
1670 }
ff68c719 1671 }
1672 else if (SvPOKp(sv) && SvLEN(sv)) {
25da4f38
IZ		 1673 I32 numtype = looks_like_number(sv);
1674
1675 /* We want to avoid a possible problem when we cache a UV which
1676 may be later translated to an NV, and the resulting NV is not
1677 the translation of the initial data.
1c846c1f 1678
25da4f38
IZ		 1679 This means that if we cache such a UV, we need to cache the
1680 NV as well. Moreover, we trade speed for space, and do not
1681 cache the NV if not needed.
1682 */
1683 if (numtype & IS_NUMBER_NOT_IV) {
1684 /* May be not an integer. Need to cache NV if we cache IV
1685 * - otherwise future conversion to NV will be wrong. */
65202027 1686 NV d;
25da4f38 1687
cf2093f6 1688 d = Atof(SvPVX(sv));
25da4f38
IZ		 1689
1690 if (SvTYPE(sv) < SVt_PVNV)
1691 sv_upgrade(sv, SVt_PVNV);
1692 SvNVX(sv) = d;
1693 (void)SvNOK_on(sv);
1694 (void)SvIOK_on(sv);
65202027 1695#if defined(USE_LONG_DOUBLE)
1d7c1841
GS		 1696 DEBUG_c(PerlIO_printf(Perl_debug_log,
1697 "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
1698 PTR2UV(sv), SvNVX(sv)));
65202027 1699#else
1d7c1841
GS		 1700 DEBUG_c(PerlIO_printf(Perl_debug_log,
1701 "0x%"UVxf" 2nv(%g)\n",
1702 PTR2UV(sv), SvNVX(sv)));
65202027 1703#endif
25da4f38
IZ		 1704 if (SvNVX(sv) < -0.5) {
1705 SvIVX(sv) = I_V(SvNVX(sv));
1706 goto ret_zero;
1707 } else {
1708 SvUVX(sv) = U_V(SvNVX(sv));
1709 SvIsUV_on(sv);
1710 }
1711 }
1712 else if (numtype & IS_NUMBER_NEG) {
1713 /* The NV may be reconstructed from IV - safe to cache IV,
1714 which may be calculated by atol(). */
1715 if (SvTYPE(sv) == SVt_PV)
1716 sv_upgrade(sv, SVt_PVIV);
1717 (void)SvIOK_on(sv);
cf2093f6 1718 SvIVX(sv) = (IV)Atol(SvPVX(sv));
25da4f38
IZ		 1719 }
1720 else if (numtype) { /* Non-negative */
1721 /* The NV may be reconstructed from UV - safe to cache UV,
1722 which may be calculated by strtoul()/atol. */
1723 if (SvTYPE(sv) == SVt_PV)
1724 sv_upgrade(sv, SVt_PVIV);
1725 (void)SvIOK_on(sv);
1726 (void)SvIsUV_on(sv);
1727#ifdef HAS_STRTOUL
cf2093f6 1728 SvUVX(sv) = Strtoul(SvPVX(sv), Null(char**), 10);
25da4f38
IZ		 1729#else /* no atou(), but we know the number fits into IV... */
1730 /* The only problem may be if it is negative... */
cf2093f6 1731 SvUVX(sv) = (UV)Atol(SvPVX(sv));
25da4f38
IZ		 1732#endif
1733 }
1734 else { /* Not a number. Cache 0. */
1735 dTHR;
1736
1737 if (SvTYPE(sv) < SVt_PVIV)
1738 sv_upgrade(sv, SVt_PVIV);
25da4f38
IZ		 1739 (void)SvIOK_on(sv);
1740 (void)SvIsUV_on(sv);
7b9e3c00
GS		 1741 SvUVX(sv) = 0; /* We assume that 0s have the
1742 same bitmap in IV and UV. */
25da4f38
IZ		 1743 if (ckWARN(WARN_NUMERIC))
1744 not_a_number(sv);
1745 }
ff68c719 1746 }
1747 else {
d008e5eb 1748 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
c6ee37c5 1749 dTHR;
d008e5eb 1750 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 1751 report_uninit();
c6ee37c5 1752 }
25da4f38
IZ		 1753 if (SvTYPE(sv) < SVt_IV)
1754 /* Typically the caller expects that sv_any is not NULL now. */
1755 sv_upgrade(sv, SVt_IV);
ff68c719 1756 return 0;
1757 }
25da4f38 1758
1d7c1841
GS		 1759 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"UVuf")\n",
1760 PTR2UV(sv),SvUVX(sv)));
25da4f38 1761 return SvIsUV(sv) ? SvUVX(sv) : (UV)SvIVX(sv);
ff68c719 1762}
1763
65202027 1764NV
864dbfa3 1765Perl_sv_2nv(pTHX_ register SV *sv)
79072805
LW		 1766{
1767 if (!sv)
1768 return 0.0;
8990e307 1769 if (SvGMAGICAL(sv)) {
463ee0b2
LW		 1770 mg_get(sv);
1771 if (SvNOKp(sv))
1772 return SvNVX(sv);
a0d0e21e 1773 if (SvPOKp(sv) && SvLEN(sv)) {
d008e5eb 1774 dTHR;
599cee73 1775 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !looks_like_number(sv))
a0d0e21e 1776 not_a_number(sv);
097ee67d 1777 return Atof(SvPVX(sv));
a0d0e21e 1778 }
25da4f38 1779 if (SvIOKp(sv)) {
1c846c1f 1780 if (SvIsUV(sv))
65202027 1781 return (NV)SvUVX(sv);
25da4f38 1782 else
65202027 1783 return (NV)SvIVX(sv);
25da4f38 1784 }
16d20bd9 1785 if (!SvROK(sv)) {
d008e5eb 1786 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
c6ee37c5 1787 dTHR;
d008e5eb 1788 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 1789 report_uninit();
c6ee37c5 1790 }
16d20bd9
AD		 1791 return 0;
1792 }
463ee0b2 1793 }
ed6116ce 1794 if (SvTHINKFIRST(sv)) {
a0d0e21e 1795 if (SvROK(sv)) {
a0d0e21e 1796 SV* tmpstr;
1554e226
DC		 1797 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
1798 (SvRV(tmpstr) != SvRV(sv)))
9e7bc3e8 1799 return SvNV(tmpstr);
56431972 1800 return PTR2NV(SvRV(sv));
a0d0e21e 1801 }
0336b60e 1802 if (SvREADONLY(sv) && !SvOK(sv)) {
d008e5eb 1803 dTHR;
599cee73 1804 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 1805 report_uninit();
ed6116ce
LW		 1806 return 0.0;
1807 }
79072805
LW		 1808 }
1809 if (SvTYPE(sv) < SVt_NV) {
463ee0b2
LW		 1810 if (SvTYPE(sv) == SVt_IV)
1811 sv_upgrade(sv, SVt_PVNV);
1812 else
1813 sv_upgrade(sv, SVt_NV);
572bbb43 1814#if defined(USE_LONG_DOUBLE)
097ee67d 1815 DEBUG_c({
f93f4e46 1816 STORE_NUMERIC_LOCAL_SET_STANDARD();
1d7c1841
GS		 1817 PerlIO_printf(Perl_debug_log,
1818 "0x%"UVxf" num(%" PERL_PRIgldbl ")\n",
1819 PTR2UV(sv), SvNVX(sv));
572bbb43
GS		 1820 RESTORE_NUMERIC_LOCAL();
1821 });
65202027 1822#else
572bbb43 1823 DEBUG_c({
f93f4e46 1824 STORE_NUMERIC_LOCAL_SET_STANDARD();
1d7c1841
GS		 1825 PerlIO_printf(Perl_debug_log, "0x%"UVxf" num(%g)\n",
1826 PTR2UV(sv), SvNVX(sv));
097ee67d
JH		 1827 RESTORE_NUMERIC_LOCAL();
1828 });
572bbb43 1829#endif
79072805
LW		 1830 }
1831 else if (SvTYPE(sv) < SVt_PVNV)
1832 sv_upgrade(sv, SVt_PVNV);
748a9306
LW		 1833 if (SvIOKp(sv) &&
1834 (!SvPOKp(sv) || !strchr(SvPVX(sv),'.') || !looks_like_number(sv)))
93a17b20 1835 {
65202027 1836 SvNVX(sv) = SvIsUV(sv) ? (NV)SvUVX(sv) : (NV)SvIVX(sv);
93a17b20 1837 }
748a9306 1838 else if (SvPOKp(sv) && SvLEN(sv)) {
d008e5eb 1839 dTHR;
599cee73 1840 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !looks_like_number(sv))
a0d0e21e 1841 not_a_number(sv);
097ee67d 1842 SvNVX(sv) = Atof(SvPVX(sv));
93a17b20 1843 }
79072805 1844 else {
11343788 1845 dTHR;
599cee73 1846 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
1d7c1841 1847 report_uninit();
25da4f38
IZ		 1848 if (SvTYPE(sv) < SVt_NV)
1849 /* Typically the caller expects that sv_any is not NULL now. */
1850 sv_upgrade(sv, SVt_NV);
a0d0e21e 1851 return 0.0;
79072805
LW		 1852 }
1853 SvNOK_on(sv);
572bbb43 1854#if defined(USE_LONG_DOUBLE)
097ee67d 1855 DEBUG_c({
f93f4e46 1856 STORE_NUMERIC_LOCAL_SET_STANDARD();
1d7c1841
GS		 1857 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
1858 PTR2UV(sv), SvNVX(sv));
572bbb43
GS		 1859 RESTORE_NUMERIC_LOCAL();
1860 });
65202027 1861#else
572bbb43 1862 DEBUG_c({
f93f4e46 1863 STORE_NUMERIC_LOCAL_SET_STANDARD();
1d7c1841
GS		 1864 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 1nv(%g)\n",
1865 PTR2UV(sv), SvNVX(sv));
097ee67d
JH		 1866 RESTORE_NUMERIC_LOCAL();
1867 });
572bbb43 1868#endif
463ee0b2 1869 return SvNVX(sv);
79072805
LW		 1870}
1871
76e3520e 1872STATIC IV
cea2e8a9 1873S_asIV(pTHX_ SV *sv)
36477c24 1874{
1875 I32 numtype = looks_like_number(sv);
65202027 1876 NV d;
36477c24 1877
25da4f38 1878 if (numtype & IS_NUMBER_TO_INT_BY_ATOL)
cf2093f6 1879 return Atol(SvPVX(sv));
d008e5eb
GS		 1880 if (!numtype) {
1881 dTHR;
1882 if (ckWARN(WARN_NUMERIC))
1883 not_a_number(sv);
1884 }
097ee67d 1885 d = Atof(SvPVX(sv));
25da4f38 1886 return I_V(d);
36477c24 1887}
1888
76e3520e 1889STATIC UV
cea2e8a9 1890S_asUV(pTHX_ SV *sv)
36477c24 1891{
1892 I32 numtype = looks_like_number(sv);
1893
84902520 1894#ifdef HAS_STRTOUL
25da4f38 1895 if (numtype & IS_NUMBER_TO_INT_BY_ATOL)
cf2093f6 1896 return Strtoul(SvPVX(sv), Null(char**), 10);
84902520 1897#endif
d008e5eb
GS		 1898 if (!numtype) {
1899 dTHR;
1900 if (ckWARN(WARN_NUMERIC))
1901 not_a_number(sv);
1902 }
097ee67d 1903 return U_V(Atof(SvPVX(sv)));
36477c24 1904}
1905
25da4f38
IZ		 1906/*
1907 * Returns a combination of (advisory only - can get false negatives)
1908 * IS_NUMBER_TO_INT_BY_ATOL, IS_NUMBER_TO_INT_BY_ATOF, IS_NUMBER_NOT_IV,
1909 * IS_NUMBER_NEG
1910 * 0 if does not look like number.
1911 *
1912 * In fact possible values are 0 and
1913 * IS_NUMBER_TO_INT_BY_ATOL 123
1914 * IS_NUMBER_TO_INT_BY_ATOL | IS_NUMBER_NOT_IV 123.1
1915 * IS_NUMBER_TO_INT_BY_ATOF | IS_NUMBER_NOT_IV 123e0
300aed98 1916 * IS_NUMBER_INFINITY
25da4f38
IZ		 1917 * with a possible addition of IS_NUMBER_NEG.
1918 */
1919
954c1994
GS		 1920/*
1921=for apidoc looks_like_number
1922
1923Test if an the content of an SV looks like a number (or is a
1924number).
1925
1926=cut
1927*/
1928
36477c24 1929I32
864dbfa3 1930Perl_looks_like_number(pTHX_ SV *sv)
36477c24 1931{
1932 register char *s;
1933 register char *send;
1934 register char *sbegin;
25da4f38
IZ		 1935 register char *nbegin;
1936 I32 numtype = 0;
300aed98 1937 I32 sawinf = 0;
36477c24 1938 STRLEN len;
1939
1940 if (SvPOK(sv)) {
1c846c1f 1941 sbegin = SvPVX(sv);
36477c24 1942 len = SvCUR(sv);
1943 }
1944 else if (SvPOKp(sv))
1945 sbegin = SvPV(sv, len);
1946 else
1947 return 1;
1948 send = sbegin + len;
1949
1950 s = sbegin;
1951 while (isSPACE(*s))
1952 s++;
25da4f38
IZ		 1953 if (*s == '-') {
1954 s++;
1955 numtype = IS_NUMBER_NEG;
1956 }
1957 else if (*s == '+')
36477c24 1958 s++;
ff0cee69 1959
25da4f38
IZ		 1960 nbegin = s;
1961 /*
097ee67d
JH		 1962 * we return IS_NUMBER_TO_INT_BY_ATOL if the number can be converted
1963 * to _integer_ with atol() and IS_NUMBER_TO_INT_BY_ATOF if you need
1964 * (int)atof().
25da4f38
IZ		 1965 */
1966
300aed98 1967 /* next must be digit or the radix separator or beginning of infinity */
ff0cee69 1968 if (isDIGIT(*s)) {
1969 do {
1970 s++;
1971 } while (isDIGIT(*s));
25da4f38
IZ		 1972
1973 if (s - nbegin >= TYPE_DIGITS(IV)) /* Cannot cache ato[ul]() */
1974 numtype |= IS_NUMBER_TO_INT_BY_ATOF | IS_NUMBER_NOT_IV;
1975 else
1976 numtype |= IS_NUMBER_TO_INT_BY_ATOL;
1977
097ee67d 1978 if (*s == '.'
1c846c1f 1979#ifdef USE_LOCALE_NUMERIC
097ee67d
JH		 1980 || IS_NUMERIC_RADIX(*s)
1981#endif
1982 ) {
ff0cee69 1983 s++;
25da4f38 1984 numtype |= IS_NUMBER_NOT_IV;
097ee67d 1985 while (isDIGIT(*s)) /* optional digits after the radix */
ff0cee69 1986 s++;
1987 }
36477c24 1988 }
097ee67d 1989 else if (*s == '.'
1c846c1f 1990#ifdef USE_LOCALE_NUMERIC
097ee67d
JH		 1991 || IS_NUMERIC_RADIX(*s)
1992#endif
1993 ) {
ff0cee69 1994 s++;
25da4f38 1995 numtype |= IS_NUMBER_TO_INT_BY_ATOL | IS_NUMBER_NOT_IV;
097ee67d 1996 /* no digits before the radix means we need digits after it */
ff0cee69 1997 if (isDIGIT(*s)) {
1998 do {
1999 s++;
2000 } while (isDIGIT(*s));
2001 }
2002 else
2003 return 0;
2004 }
300aed98
JH		 2005 else if (*s == 'I' || *s == 'i') {
2006 s++; if (*s != 'N' && *s != 'n') return 0;
2007 s++; if (*s != 'F' && *s != 'f') return 0;
2008 s++; if (*s == 'I' || *s == 'i') {
2009 s++; if (*s != 'N' && *s != 'n') return 0;
2010 s++; if (*s != 'I' && *s != 'i') return 0;
2011 s++; if (*s != 'T' && *s != 't') return 0;
2012 s++; if (*s != 'Y' && *s != 'y') return 0;
2013 }
2014 sawinf = 1;
2015 }
ff0cee69 2016 else
2017 return 0;
2018
300aed98
JH		 2019 if (sawinf)
2020 numtype = IS_NUMBER_INFINITY;
2021 else {
2022 /* we can have an optional exponent part */
2023 if (*s == 'e' || *s == 'E') {
2024 numtype &= ~IS_NUMBER_NEG;
2025 numtype |= IS_NUMBER_TO_INT_BY_ATOF | IS_NUMBER_NOT_IV;
36477c24 2026 s++;
300aed98
JH		 2027 if (*s == '+' || *s == '-')
2028 s++;
2029 if (isDIGIT(*s)) {
2030 do {
2031 s++;
2032 } while (isDIGIT(*s));
2033 }
2034 else
2035 return 0;
2036 }
36477c24 2037 }
2038 while (isSPACE(*s))
2039 s++;
2040 if (s >= send)
2041 return numtype;
2042 if (len == 10 && memEQ(sbegin, "0 but true", 10))
25da4f38 2043 return IS_NUMBER_TO_INT_BY_ATOL;
36477c24 2044 return 0;
2045}
2046
79072805 2047char *
864dbfa3 2048Perl_sv_2pv_nolen(pTHX_ register SV *sv)
1fa8b10d
JD		 2049{
2050 STRLEN n_a;
2051 return sv_2pv(sv, &n_a);
2052}
2053
25da4f38 2054/* We assume that buf is at least TYPE_CHARS(UV) long. */
864dbfa3 2055static char *
25da4f38
IZ		 2056uiv_2buf(char *buf, IV iv, UV uv, int is_uv, char **peob)
2057{
25da4f38
IZ		 2058 char *ptr = buf + TYPE_CHARS(UV);
2059 char *ebuf = ptr;
2060 int sign;
25da4f38
IZ		 2061
2062 if (is_uv)
2063 sign = 0;
2064 else if (iv >= 0) {
2065 uv = iv;
2066 sign = 0;
2067 } else {
2068 uv = -iv;
2069 sign = 1;
2070 }
2071 do {
2072 *--ptr = '0' + (uv % 10);
2073 } while (uv /= 10);
2074 if (sign)
2075 *--ptr = '-';
2076 *peob = ebuf;
2077 return ptr;
2078}
2079
1fa8b10d 2080char *
864dbfa3 2081Perl_sv_2pv(pTHX_ register SV *sv, STRLEN *lp)
79072805
LW		 2082{
2083 register char *s;
2084 int olderrno;
46fc3d4c 2085 SV *tsv;
25da4f38
IZ		 2086 char tbuf[64]; /* Must fit sprintf/Gconvert of longest IV/NV */
2087 char *tmpbuf = tbuf;
79072805 2088
463ee0b2
LW		 2089 if (!sv) {
2090 *lp = 0;
2091 return "";
2092 }
8990e307 2093 if (SvGMAGICAL(sv)) {
463ee0b2
LW		 2094 mg_get(sv);
2095 if (SvPOKp(sv)) {
2096 *lp = SvCUR(sv);
2097 return SvPVX(sv);
2098 }
cf2093f6 2099 if (SvIOKp(sv)) {
1c846c1f 2100 if (SvIsUV(sv))
57def98f 2101 (void)sprintf(tmpbuf,"%"UVuf, (UV)SvUVX(sv));
cf2093f6 2102 else
57def98f 2103 (void)sprintf(tmpbuf,"%"IVdf, (IV)SvIVX(sv));
46fc3d4c 2104 tsv = Nullsv;
a0d0e21e 2105 goto tokensave;
463ee0b2
LW		 2106 }
2107 if (SvNOKp(sv)) {
2d4389e4 2108 Gconvert(SvNVX(sv), NV_DIG, 0, tmpbuf);
46fc3d4c 2109 tsv = Nullsv;
a0d0e21e 2110 goto tokensave;
463ee0b2 2111 }
16d20bd9 2112 if (!SvROK(sv)) {
d008e5eb 2113 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
c6ee37c5 2114 dTHR;
d008e5eb 2115 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 2116 report_uninit();
c6ee37c5 2117 }
16d20bd9
AD		 2118 *lp = 0;
2119 return "";
2120 }
463ee0b2 2121 }
ed6116ce
LW		 2122 if (SvTHINKFIRST(sv)) {
2123 if (SvROK(sv)) {
a0d0e21e 2124 SV* tmpstr;
1554e226
DC		 2125 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,string)) &&
2126 (SvRV(tmpstr) != SvRV(sv)))
9e7bc3e8 2127 return SvPV(tmpstr,*lp);
ed6116ce
LW		 2128 sv = (SV*)SvRV(sv);
2129 if (!sv)
2130 s = "NULLREF";
2131 else {
f9277f47
IZ		 2132 MAGIC *mg;
2133
ed6116ce 2134 switch (SvTYPE(sv)) {
f9277f47
IZ		 2135 case SVt_PVMG:
2136 if ( ((SvFLAGS(sv) &
1c846c1f 2137 (SVs_OBJECT|SVf_OK|SVs_GMG|SVs_SMG|SVs_RMG))
3149a8e4 2138 == (SVs_OBJECT|SVs_RMG))
57668c4d 2139 && strEQ(s=HvNAME(SvSTASH(sv)), "Regexp")
f9277f47 2140 && (mg = mg_find(sv, 'r'))) {
5c0ca799 2141 dTHR;
2cd61cdb 2142 regexp *re = (regexp *)mg->mg_obj;
1bd3ad17 2143
2cd61cdb 2144 if (!mg->mg_ptr) {
8782bef2
GB		 2145 char *fptr = "msix";
2146 char reflags[6];
2147 char ch;
2148 int left = 0;
2149 int right = 4;
2150 U16 reganch = (re->reganch & PMf_COMPILETIME) >> 12;
2151
155aba94 2152 while((ch = *fptr++)) {
8782bef2
GB		 2153 if(reganch & 1) {
2154 reflags[left++] = ch;
2155 }
2156 else {
2157 reflags[right--] = ch;
2158 }
2159 reganch >>= 1;
2160 }
2161 if(left != 4) {
2162 reflags[left] = '-';
2163 left = 5;
2164 }
2165
2166 mg->mg_len = re->prelen + 4 + left;
2167 New(616, mg->mg_ptr, mg->mg_len + 1 + left, char);
2168 Copy("(?", mg->mg_ptr, 2, char);
2169 Copy(reflags, mg->mg_ptr+2, left, char);
2170 Copy(":", mg->mg_ptr+left+2, 1, char);
2171 Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char);
1bd3ad17
IZ		 2172 mg->mg_ptr[mg->mg_len - 1] = ')';
2173 mg->mg_ptr[mg->mg_len] = 0;
2174 }
3280af22 2175 PL_reginterp_cnt += re->program[0].next_off;
1bd3ad17
IZ		 2176 *lp = mg->mg_len;
2177 return mg->mg_ptr;
f9277f47
IZ		 2178 }
2179 /* Fall through */
ed6116ce
LW		 2180 case SVt_NULL:
2181 case SVt_IV:
2182 case SVt_NV:
2183 case SVt_RV:
2184 case SVt_PV:
2185 case SVt_PVIV:
2186 case SVt_PVNV:
81689caa
HS		 2187 case SVt_PVBM: if (SvROK(sv))
2188 s = "REF";
2189 else
2190 s = "SCALAR"; break;
ed6116ce
LW		 2191 case SVt_PVLV: s = "LVALUE"; break;
2192 case SVt_PVAV: s = "ARRAY"; break;
2193 case SVt_PVHV: s = "HASH"; break;
2194 case SVt_PVCV: s = "CODE"; break;
2195 case SVt_PVGV: s = "GLOB"; break;
1d2dff63 2196 case SVt_PVFM: s = "FORMAT"; break;
36477c24 2197 case SVt_PVIO: s = "IO"; break;
ed6116ce
LW		 2198 default: s = "UNKNOWN"; break;
2199 }
46fc3d4c 2200 tsv = NEWSV(0,0);
ed6116ce 2201 if (SvOBJECT(sv))
cea2e8a9 2202 Perl_sv_setpvf(aTHX_ tsv, "%s=%s", HvNAME(SvSTASH(sv)), s);
ed6116ce 2203 else
46fc3d4c 2204 sv_setpv(tsv, s);
57def98f 2205 Perl_sv_catpvf(aTHX_ tsv, "(0x%"UVxf")", PTR2UV(sv));
a0d0e21e 2206 goto tokensaveref;
463ee0b2 2207 }
ed6116ce
LW		 2208 *lp = strlen(s);
2209 return s;
79072805 2210 }
0336b60e
IZ		 2211 if (SvREADONLY(sv) && !SvOK(sv)) {
2212 dTHR;
2213 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 2214 report_uninit();
ed6116ce
LW		 2215 *lp = 0;
2216 return "";
79072805 2217 }
79072805 2218 }
25da4f38
IZ		 2219 if (SvNOKp(sv)) { /* See note in sv_2uv() */
2220 /* XXXX 64-bit? IV may have better precision... */
8aad8eb3 2221 /* I tried changing this to be 64-bit-aware and
34d861e4
JH		 2222 * the t/op/numconvert.t became very, very, angry.
2223 * --jhi Sep 1999 */
79072805
LW		 2224 if (SvTYPE(sv) < SVt_PVNV)
2225 sv_upgrade(sv, SVt_PVNV);
1c846c1f 2226 /* The +20 is pure guesswork. Configure test needed. --jhi */
59155cc0 2227 SvGROW(sv, NV_DIG + 20);
463ee0b2 2228 s = SvPVX(sv);
79072805 2229 olderrno = errno; /* some Xenix systems wipe out errno here */
79072805 2230#ifdef apollo
463ee0b2 2231 if (SvNVX(sv) == 0.0)
79072805
LW		 2232 (void)strcpy(s,"0");
2233 else
2234#endif /*apollo*/
bbce6d69 2235 {
2d4389e4 2236 Gconvert(SvNVX(sv), NV_DIG, 0, s);
bbce6d69 2237 }
79072805 2238 errno = olderrno;
a0d0e21e
LW		 2239#ifdef FIXNEGATIVEZERO
2240 if (*s == '-' && s[1] == '0' && !s[2])
2241 strcpy(s,"0");
2242#endif
79072805
LW		 2243 while (*s) s++;
2244#ifdef hcx
2245 if (s[-1] == '.')
46fc3d4c 2246 *--s = '\0';
79072805
LW		 2247#endif
2248 }
748a9306 2249 else if (SvIOKp(sv)) {
25da4f38 2250 U32 isIOK = SvIOK(sv);
0336b60e 2251 U32 isUIOK = SvIsUV(sv);
25da4f38
IZ		 2252 char buf[TYPE_CHARS(UV)];
2253 char *ebuf, *ptr;
2254
79072805
LW		 2255 if (SvTYPE(sv) < SVt_PVIV)
2256 sv_upgrade(sv, SVt_PVIV);
0336b60e 2257 if (isUIOK)
25da4f38 2258 ptr = uiv_2buf(buf, 0, SvUVX(sv), 1, &ebuf);
0336b60e 2259 else
25da4f38 2260 ptr = uiv_2buf(buf, SvIVX(sv), 0, 0, &ebuf);
0336b60e
IZ		 2261 SvGROW(sv, ebuf - ptr + 1); /* inlined from sv_setpvn */
2262 Move(ptr,SvPVX(sv),ebuf - ptr,char);
2263 SvCUR_set(sv, ebuf - ptr);
46fc3d4c 2264 s = SvEND(sv);
0336b60e 2265 *s = '\0';
25da4f38 2266 if (isIOK)
64f14228
GA		 2267 SvIOK_on(sv);
2268 else
2269 SvIOKp_on(sv);
0336b60e
IZ		 2270 if (isUIOK)
2271 SvIsUV_on(sv);
2272 SvPOK_on(sv);
79072805
LW		 2273 }
2274 else {
11343788 2275 dTHR;
0336b60e
IZ		 2276 if (ckWARN(WARN_UNINITIALIZED)
2277 && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
2278 {
1d7c1841 2279 report_uninit();
0336b60e 2280 }
a0d0e21e 2281 *lp = 0;
25da4f38
IZ		 2282 if (SvTYPE(sv) < SVt_PV)
2283 /* Typically the caller expects that sv_any is not NULL now. */
2284 sv_upgrade(sv, SVt_PV);
a0d0e21e 2285 return "";
79072805 2286 }
463ee0b2
LW		 2287 *lp = s - SvPVX(sv);
2288 SvCUR_set(sv, *lp);
79072805 2289 SvPOK_on(sv);
1d7c1841
GS		 2290 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
2291 PTR2UV(sv),SvPVX(sv)));
463ee0b2 2292 return SvPVX(sv);
a0d0e21e
LW		 2293
2294 tokensave:
2295 if (SvROK(sv)) { /* XXX Skip this when sv_pvn_force calls */
2296 /* Sneaky stuff here */
2297
2298 tokensaveref:
46fc3d4c 2299 if (!tsv)
96827780 2300 tsv = newSVpv(tmpbuf, 0);
46fc3d4c 2301 sv_2mortal(tsv);
2302 *lp = SvCUR(tsv);
2303 return SvPVX(tsv);
a0d0e21e
LW		 2304 }
2305 else {
2306 STRLEN len;
46fc3d4c 2307 char *t;
2308
2309 if (tsv) {
2310 sv_2mortal(tsv);
2311 t = SvPVX(tsv);
2312 len = SvCUR(tsv);
2313 }
2314 else {
96827780
MB		 2315 t = tmpbuf;
2316 len = strlen(tmpbuf);
46fc3d4c 2317 }
a0d0e21e 2318#ifdef FIXNEGATIVEZERO
46fc3d4c 2319 if (len == 2 && t[0] == '-' && t[1] == '0') {
2320 t = "0";
2321 len = 1;
2322 }
a0d0e21e
LW		 2323#endif
2324 (void)SvUPGRADE(sv, SVt_PV);
46fc3d4c 2325 *lp = len;
a0d0e21e
LW		 2326 s = SvGROW(sv, len + 1);
2327 SvCUR_set(sv, len);
46fc3d4c 2328 (void)strcpy(s, t);
6bf554b4 2329 SvPOKp_on(sv);
a0d0e21e
LW		 2330 return s;
2331 }
463ee0b2
LW		 2332}
2333
7340a771
GS		 2334char *
2335Perl_sv_2pvbyte_nolen(pTHX_ register SV *sv)
2336{
560a288e
GS		 2337 STRLEN n_a;
2338 return sv_2pvbyte(sv, &n_a);
7340a771
GS		 2339}
2340
2341char *
2342Perl_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp)
2343{
2344 return sv_2pv(sv,lp);
2345}
2346
2347char *
2348Perl_sv_2pvutf8_nolen(pTHX_ register SV *sv)
2349{
560a288e
GS		 2350 STRLEN n_a;
2351 return sv_2pvutf8(sv, &n_a);
7340a771
GS		 2352}
2353
2354char *
2355Perl_sv_2pvutf8(pTHX_ register SV *sv, STRLEN *lp)
2356{
560a288e 2357 sv_utf8_upgrade(sv);
7340a771
GS		 2358 return sv_2pv(sv,lp);
2359}
1c846c1f 2360
463ee0b2
LW		 2361/* This function is only called on magical items */
2362bool
864dbfa3 2363Perl_sv_2bool(pTHX_ register SV *sv)
463ee0b2 2364{
8990e307 2365 if (SvGMAGICAL(sv))
463ee0b2
LW		 2366 mg_get(sv);
2367
a0d0e21e
LW		 2368 if (!SvOK(sv))
2369 return 0;
2370 if (SvROK(sv)) {
11343788 2371 dTHR;
a0d0e21e 2372 SV* tmpsv;
1554e226
DC		 2373 if (SvAMAGIC(sv) && (tmpsv=AMG_CALLun(sv,bool_)) &&
2374 (SvRV(tmpsv) != SvRV(sv)))
9e7bc3e8 2375 return SvTRUE(tmpsv);
a0d0e21e
LW		 2376 return SvRV(sv) != 0;
2377 }
463ee0b2 2378 if (SvPOKp(sv)) {
11343788
MB		 2379 register XPV* Xpvtmp;
2380 if ((Xpvtmp = (XPV*)SvANY(sv)) &&
2381 (*Xpvtmp->xpv_pv > '0' ||
2382 Xpvtmp->xpv_cur > 1 ||
2383 (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0')))
463ee0b2
LW		 2384 return 1;
2385 else
2386 return 0;
2387 }
2388 else {
2389 if (SvIOKp(sv))
2390 return SvIVX(sv) != 0;
2391 else {
2392 if (SvNOKp(sv))
2393 return SvNVX(sv) != 0.0;
2394 else
2395 return FALSE;
2396 }
2397 }
79072805
LW		 2398}
2399
c461cf8f
JH		 2400/*
2401=for apidoc sv_utf8_upgrade
2402
2403Convert the PV of an SV to its UTF8-encoded form.
2404
2405=cut
2406*/
2407
560a288e
GS		 2408void
2409Perl_sv_utf8_upgrade(pTHX_ register SV *sv)
2410{
40826f67
JH		 2411 char *s, *t;
2412 bool hibit;
560a288e
GS		 2413
2414 if (!sv || !SvPOK(sv) || SvUTF8(sv))
2415 return;
2416
40826f67
JH		 2417 /* This function could be much more efficient if we had a FLAG in SVs
2418 * to signal if there are any hibit chars in the PV.
560a288e 2419 */
40826f67
JH		 2420 for (s = t = SvPVX(sv), hibit = FALSE; t < SvEND(sv) && !hibit; t++)
2421 if (*t & 0x80)
2422 hibit = TRUE;
560a288e 2423
40826f67 2424 if (hibit) {
67e989fb 2425 STRLEN len = SvCUR(sv) + 1; /* Plus the \0 */
00df9076 2426 SvPVX(sv) = (char*)bytes_to_utf8((U8*)s, &len);
841d7a39
JH		 2427 SvCUR(sv) = len - 1;
2428 SvLEN(sv) = len; /* No longer know the real size. */
560a288e 2429 SvUTF8_on(sv);
d2f449dd 2430 Safefree(s); /* No longer using what was there before. */
560a288e
GS		 2431 }
2432}
2433
c461cf8f
JH		 2434/*
2435=for apidoc sv_utf8_downgrade
2436
2437Attempt to convert the PV of an SV from UTF8-encoded to byte encoding.
2438This may not be possible if the PV contains non-byte encoding characters;
2439if this is the case, either returns false or, if C<fail_ok> is not
2440true, croaks.
2441
2442=cut
2443*/
2444
560a288e
GS		 2445bool
2446Perl_sv_utf8_downgrade(pTHX_ register SV* sv, bool fail_ok)
2447{
2448 if (SvPOK(sv) && SvUTF8(sv)) {
2449 char *c = SvPVX(sv);
9f9ab905 2450 STRLEN len = SvCUR(sv) + 1; /* include trailing NUL */
00df9076 2451 if (!utf8_to_bytes((U8*)c, &len)) {
67e989fb
JH		 2452 if (fail_ok)
2453 return FALSE;
4b3603a4
JH		 2454 else {
2455 if (PL_op)
2456 Perl_croak(aTHX_ "Wide character in %s",
2457 PL_op_desc[PL_op->op_type]);
2458 else
2459 Perl_croak(aTHX_ "Wide character");
2460 }
67e989fb
JH		 2461 }
2462 SvCUR(sv) = len - 1;
9f9ab905 2463 SvUTF8_off(sv);
560a288e
GS		 2464 }
2465 return TRUE;
2466}
2467
c461cf8f
JH		 2468/*
2469=for apidoc sv_utf8_encode
2470
2471Convert the PV of an SV to UTF8-encoded, but then turn off the C<SvUTF8>
1c846c1f 2472flag so that it looks like bytes again. Nothing calls this.
c461cf8f
JH		 2473
2474=cut
2475*/
2476
560a288e
GS		 2477void
2478Perl_sv_utf8_encode(pTHX_ register SV *sv)
2479{
2480 sv_utf8_upgrade(sv);
2481 SvUTF8_off(sv);
2482}
2483
2484bool
2485Perl_sv_utf8_decode(pTHX_ register SV *sv)
2486{
2487 if (SvPOK(sv)) {
2488 char *c;
2489 bool has_utf = FALSE;
2490 if (!sv_utf8_downgrade(sv, TRUE))
2491 return FALSE;
2492
2493 /* it is actually just a matter of turning the utf8 flag on, but
2494 * we want to make sure everything inside is valid utf8 first.
2495 */
2496 c = SvPVX(sv);
00df9076 2497 if (!is_utf8_string((U8*)c, SvCUR(sv)+1))
67e989fb
JH		 2498 return FALSE;
2499
560a288e 2500 while (c < SvEND(sv)) {
67e989fb
JH		 2501 if (*c++ & 0x80) {
2502 SvUTF8_on(sv);
2503 break;
2504 }
560a288e 2505 }
560a288e
GS		 2506 }
2507 return TRUE;
2508}
2509
2510
79072805 2511/* Note: sv_setsv() should not be called with a source string that needs
463ee0b2 2512 * to be reused, since it may destroy the source string if it is marked
79072805
LW		 2513 * as temporary.
2514 */
2515
954c1994
GS		 2516/*
2517=for apidoc sv_setsv
2518
2519Copies the contents of the source SV C<ssv> into the destination SV C<dsv>.
2520The source SV may be destroyed if it is mortal. Does not handle 'set'
2521magic. See the macro forms C<SvSetSV>, C<SvSetSV_nosteal> and
2522C<sv_setsv_mg>.
2523
2524=cut
2525*/
2526
79072805 2527void
864dbfa3 2528Perl_sv_setsv(pTHX_ SV *dstr, register SV *sstr)
79072805 2529{
11343788 2530 dTHR;
8990e307
LW		 2531 register U32 sflags;
2532 register int dtype;
2533 register int stype;
463ee0b2 2534
79072805
LW		 2535 if (sstr == dstr)
2536 return;
2213622d 2537 SV_CHECK_THINKFIRST(dstr);
79072805 2538 if (!sstr)
3280af22 2539 sstr = &PL_sv_undef;
8990e307
LW		 2540 stype = SvTYPE(sstr);
2541 dtype = SvTYPE(dstr);
79072805 2542
a0d0e21e 2543 SvAMAGIC_off(dstr);
9e7bc3e8 2544
463ee0b2 2545 /* There's a lot of redundancy below but we're going for speed here */
79072805 2546
8990e307 2547 switch (stype) {
79072805 2548 case SVt_NULL:
aece5585 2549 undef_sstr:
20408e3c
GS		 2550 if (dtype != SVt_PVGV) {
2551 (void)SvOK_off(dstr);
2552 return;
2553 }
2554 break;
463ee0b2 2555 case SVt_IV:
aece5585
GA		 2556 if (SvIOK(sstr)) {
2557 switch (dtype) {
2558 case SVt_NULL:
8990e307 2559 sv_upgrade(dstr, SVt_IV);
aece5585
GA		 2560 break;
2561 case SVt_NV:
8990e307 2562 sv_upgrade(dstr, SVt_PVNV);
aece5585
GA		 2563 break;
2564 case SVt_RV:
2565 case SVt_PV:
a0d0e21e 2566 sv_upgrade(dstr, SVt_PVIV);
aece5585
GA		 2567 break;
2568 }
2569 (void)SvIOK_only(dstr);
2570 SvIVX(dstr) = SvIVX(sstr);
25da4f38
IZ		 2571 if (SvIsUV(sstr))
2572 SvIsUV_on(dstr);
aece5585
GA		 2573 SvTAINT(dstr);
2574 return;
8990e307 2575 }
aece5585
GA		 2576 goto undef_sstr;
2577
463ee0b2 2578 case SVt_NV:
aece5585
GA		 2579 if (SvNOK(sstr)) {
2580 switch (dtype) {
2581 case SVt_NULL:
2582 case SVt_IV:
8990e307 2583 sv_upgrade(dstr, SVt_NV);
aece5585
GA		 2584 break;
2585 case SVt_RV:
2586 case SVt_PV:
2587 case SVt_PVIV:
a0d0e21e 2588 sv_upgrade(dstr, SVt_PVNV);
aece5585
GA		 2589 break;
2590 }
2591 SvNVX(dstr) = SvNVX(sstr);
2592 (void)SvNOK_only(dstr);
2593 SvTAINT(dstr);
2594 return;
8990e307 2595 }
aece5585
GA		 2596 goto undef_sstr;
2597
ed6116ce 2598 case SVt_RV:
8990e307 2599 if (dtype < SVt_RV)
ed6116ce 2600 sv_upgrade(dstr, SVt_RV);
c07a80fd 2601 else if (dtype == SVt_PVGV &&
2602 SvTYPE(SvRV(sstr)) == SVt_PVGV) {
2603 sstr = SvRV(sstr);
a5f75d66 2604 if (sstr == dstr) {
1d7c1841
GS		 2605 if (GvIMPORTED(dstr) != GVf_IMPORTED
2606 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2607 {
a5f75d66 2608 GvIMPORTED_on(dstr);
1d7c1841 2609 }
a5f75d66
AD		 2610 GvMULTI_on(dstr);
2611 return;
2612 }
c07a80fd 2613 goto glob_assign;
2614 }
ed6116ce 2615 break;
463ee0b2 2616 case SVt_PV:
fc36a67e 2617 case SVt_PVFM:
8990e307 2618 if (dtype < SVt_PV)
463ee0b2 2619 sv_upgrade(dstr, SVt_PV);
463ee0b2
LW		 2620 break;
2621 case SVt_PVIV:
8990e307 2622 if (dtype < SVt_PVIV)
463ee0b2 2623 sv_upgrade(dstr, SVt_PVIV);
463ee0b2
LW		 2624 break;
2625 case SVt_PVNV:
8990e307 2626 if (dtype < SVt_PVNV)
463ee0b2 2627 sv_upgrade(dstr, SVt_PVNV);
463ee0b2 2628 break;
4633a7c4
LW		 2629 case SVt_PVAV:
2630 case SVt_PVHV:
2631 case SVt_PVCV:
4633a7c4 2632 case SVt_PVIO:
533c011a 2633 if (PL_op)
cea2e8a9 2634 Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0),
22c35a8c 2635 PL_op_name[PL_op->op_type]);
4633a7c4 2636 else
cea2e8a9 2637 Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0));
4633a7c4
LW		 2638 break;
2639
79072805 2640 case SVt_PVGV:
8990e307 2641 if (dtype <= SVt_PVGV) {
c07a80fd 2642 glob_assign:
a5f75d66 2643 if (dtype != SVt_PVGV) {
a0d0e21e
LW		 2644 char *name = GvNAME(sstr);
2645 STRLEN len = GvNAMELEN(sstr);
463ee0b2 2646 sv_upgrade(dstr, SVt_PVGV);
6662521e 2647 sv_magic(dstr, dstr, '*', Nullch, 0);
85aff577 2648 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
a0d0e21e
LW		 2649 GvNAME(dstr) = savepvn(name, len);
2650 GvNAMELEN(dstr) = len;
2651 SvFAKE_on(dstr); /* can coerce to non-glob */
2652 }
7bac28a0 2653 /* ahem, death to those who redefine active sort subs */
3280af22
NIS		 2654 else if (PL_curstackinfo->si_type == PERLSI_SORT
2655 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
cea2e8a9 2656 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
7bac28a0 2657 GvNAME(dstr));
a0d0e21e 2658 (void)SvOK_off(dstr);
a5f75d66 2659 GvINTRO_off(dstr); /* one-shot flag */
1edc1566 2660 gp_free((GV*)dstr);
79072805 2661 GvGP(dstr) = gp_ref(GvGP(sstr));
8990e307 2662 SvTAINT(dstr);
1d7c1841
GS		 2663 if (GvIMPORTED(dstr) != GVf_IMPORTED
2664 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2665 {
a5f75d66 2666 GvIMPORTED_on(dstr);
1d7c1841 2667 }
a5f75d66 2668 GvMULTI_on(dstr);
79072805
LW		 2669 return;
2670 }
2671 /* FALL THROUGH */
2672
2673 default:
973f89ab
CS		 2674 if (SvGMAGICAL(sstr)) {
2675 mg_get(sstr);
2676 if (SvTYPE(sstr) != stype) {
2677 stype = SvTYPE(sstr);
2678 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
2679 goto glob_assign;
2680 }
2681 }
ded42b9f 2682 if (stype == SVt_PVLV)
6fc92669 2683 (void)SvUPGRADE(dstr, SVt_PVNV);
ded42b9f 2684 else
6fc92669 2685 (void)SvUPGRADE(dstr, stype);
79072805
LW		 2686 }
2687
8990e307
LW		 2688 sflags = SvFLAGS(sstr);
2689
2690 if (sflags & SVf_ROK) {
2691 if (dtype >= SVt_PV) {
2692 if (dtype == SVt_PVGV) {
2693 SV *sref = SvREFCNT_inc(SvRV(sstr));
2694 SV *dref = 0;
a5f75d66 2695 int intro = GvINTRO(dstr);
a0d0e21e
LW		 2696
2697 if (intro) {
2698 GP *gp;
1d7c1841 2699 gp_free((GV*)dstr);
a5f75d66 2700 GvINTRO_off(dstr); /* one-shot flag */
a0d0e21e 2701 Newz(602,gp, 1, GP);
44a8e56a 2702 GvGP(dstr) = gp_ref(gp);
a0d0e21e 2703 GvSV(dstr) = NEWSV(72,0);
1d7c1841 2704 GvLINE(dstr) = CopLINE(PL_curcop);
1edc1566 2705 GvEGV(dstr) = (GV*)dstr;
a0d0e21e 2706 }
a5f75d66 2707 GvMULTI_on(dstr);
8990e307
LW		 2708 switch (SvTYPE(sref)) {
2709 case SVt_PVAV:
a0d0e21e
LW		 2710 if (intro)
2711 SAVESPTR(GvAV(dstr));
2712 else
2713 dref = (SV*)GvAV(dstr);
8990e307 2714 GvAV(dstr) = (AV*)sref;
39bac7f7 2715 if (!GvIMPORTED_AV(dstr)
1d7c1841
GS		 2716 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2717 {
a5f75d66 2718 GvIMPORTED_AV_on(dstr);
1d7c1841 2719 }
8990e307
LW		 2720 break;
2721 case SVt_PVHV:
a0d0e21e
LW		 2722 if (intro)
2723 SAVESPTR(GvHV(dstr));
2724 else
2725 dref = (SV*)GvHV(dstr);
8990e307 2726 GvHV(dstr) = (HV*)sref;
39bac7f7 2727 if (!GvIMPORTED_HV(dstr)
1d7c1841
GS		 2728 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2729 {
a5f75d66 2730 GvIMPORTED_HV_on(dstr);
1d7c1841 2731 }
8990e307
LW		 2732 break;
2733 case SVt_PVCV:
8ebc5c01 2734 if (intro) {
2735 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
2736 SvREFCNT_dec(GvCV(dstr));
2737 GvCV(dstr) = Nullcv;
68dc0745 2738 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3280af22 2739 PL_sub_generation++;
8ebc5c01 2740 }
a0d0e21e 2741 SAVESPTR(GvCV(dstr));
8ebc5c01 2742 }
68dc0745 2743 else
2744 dref = (SV*)GvCV(dstr);
2745 if (GvCV(dstr) != (CV*)sref) {
748a9306 2746 CV* cv = GvCV(dstr);
4633a7c4 2747 if (cv) {
68dc0745 2748 if (!GvCVGEN((GV*)dstr) &&
2749 (CvROOT(cv) || CvXSUB(cv)))
2750 {
beab0874 2751 SV *const_sv;
7bac28a0 2752 /* ahem, death to those who redefine
2753 * active sort subs */
3280af22
NIS		 2754 if (PL_curstackinfo->si_type == PERLSI_SORT &&
2755 PL_sortcop == CvSTART(cv))
1c846c1f 2756 Perl_croak(aTHX_
7bac28a0 2757 "Can't redefine active sort subroutine %s",
2758 GvENAME((GV*)dstr));
beab0874
JT		 2759 /* Redefining a sub - warning is mandatory if
2760 it was a const and its value changed. */
2761 if (ckWARN(WARN_REDEFINE)
2762 || (CvCONST(cv)
2763 && (!CvCONST((CV*)sref)
2764 || sv_cmp(cv_const_sv(cv),
2765 cv_const_sv((CV*)sref)))))
2766 {
2767 Perl_warner(aTHX_ WARN_REDEFINE,
2768 CvCONST(cv)
2769 ? "Constant subroutine %s redefined"
47deb5e7 2770 : "Subroutine %s redefined",
beab0874
JT		 2771 GvENAME((GV*)dstr));
2772 }
9607fc9c 2773 }
3fe9a6f1 2774 cv_ckproto(cv, (GV*)dstr,
2775 SvPOK(sref) ? SvPVX(sref) : Nullch);
4633a7c4 2776 }
a5f75d66 2777 GvCV(dstr) = (CV*)sref;
7a4c00b4 2778 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
a5f75d66 2779 GvASSUMECV_on(dstr);
3280af22 2780 PL_sub_generation++;
a5f75d66 2781 }
39bac7f7 2782 if (!GvIMPORTED_CV(dstr)
1d7c1841
GS		 2783 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2784 {
a5f75d66 2785 GvIMPORTED_CV_on(dstr);
1d7c1841 2786 }
8990e307 2787 break;
91bba347
LW		 2788 case SVt_PVIO:
2789 if (intro)
2790 SAVESPTR(GvIOp(dstr));
2791 else
2792 dref = (SV*)GvIOp(dstr);
2793 GvIOp(dstr) = (IO*)sref;
2794 break;
f4d13ee9
JH		 2795 case SVt_PVFM:
2796 if (intro)
2797 SAVESPTR(GvFORM(dstr));
2798 else
2799 dref = (SV*)GvFORM(dstr);
2800 GvFORM(dstr) = (CV*)sref;
2801 break;
8990e307 2802 default:
a0d0e21e
LW		 2803 if (intro)
2804 SAVESPTR(GvSV(dstr));
2805 else
2806 dref = (SV*)GvSV(dstr);
8990e307 2807 GvSV(dstr) = sref;
39bac7f7 2808 if (!GvIMPORTED_SV(dstr)
1d7c1841
GS		 2809 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2810 {
a5f75d66 2811 GvIMPORTED_SV_on(dstr);
1d7c1841 2812 }
8990e307
LW		 2813 break;
2814 }
2815 if (dref)
2816 SvREFCNT_dec(dref);
a0d0e21e
LW		 2817 if (intro)
2818 SAVEFREESV(sref);
8990e307
LW		 2819 SvTAINT(dstr);
2820 return;
2821 }
a0d0e21e 2822 if (SvPVX(dstr)) {
760ac839 2823 (void)SvOOK_off(dstr); /* backoff */
50483b2c
JD		 2824 if (SvLEN(dstr))
2825 Safefree(SvPVX(dstr));
a0d0e21e
LW		 2826 SvLEN(dstr)=SvCUR(dstr)=0;
2827 }
8990e307 2828 }
a0d0e21e 2829 (void)SvOK_off(dstr);
8990e307 2830 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
ed6116ce 2831 SvROK_on(dstr);
8990e307 2832 if (sflags & SVp_NOK) {
ed6116ce
LW		 2833 SvNOK_on(dstr);
2834 SvNVX(dstr) = SvNVX(sstr);
2835 }
8990e307 2836 if (sflags & SVp_IOK) {
a0d0e21e 2837 (void)SvIOK_on(dstr);
ed6116ce 2838 SvIVX(dstr) = SvIVX(sstr);
2b1c7e3e 2839 if (sflags & SVf_IVisUV)
25da4f38 2840 SvIsUV_on(dstr);
ed6116ce 2841 }
a0d0e21e
LW		 2842 if (SvAMAGIC(sstr)) {
2843 SvAMAGIC_on(dstr);
2844 }
ed6116ce 2845 }
8990e307 2846 else if (sflags & SVp_POK) {
79072805
LW		 2847
2848 /*
2849 * Check to see if we can just swipe the string. If so, it's a
2850 * possible small lose on short strings, but a big win on long ones.
463ee0b2
LW		 2851 * It might even be a win on short strings if SvPVX(dstr)
2852 * has to be allocated and SvPVX(sstr) has to be freed.
79072805
LW		 2853 */
2854
ff68c719 2855 if (SvTEMP(sstr) && /* slated for free anyway? */
01b73108 2856 SvREFCNT(sstr) == 1 && /* and no other references to it? */
1c846c1f
NIS		 2857 !(sflags & SVf_OOK) && /* and not involved in OOK hack? */
2858 SvLEN(sstr)) /* and really is a string */
a5f75d66 2859 {
adbc6bb1 2860 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
a5f75d66
AD		 2861 if (SvOOK(dstr)) {
2862 SvFLAGS(dstr) &= ~SVf_OOK;
2863 Safefree(SvPVX(dstr) - SvIVX(dstr));
2864 }
50483b2c 2865 else if (SvLEN(dstr))
a5f75d66 2866 Safefree(SvPVX(dstr));
79072805 2867 }
a5f75d66 2868 (void)SvPOK_only(dstr);
463ee0b2 2869 SvPV_set(dstr, SvPVX(sstr));
79072805
LW		 2870 SvLEN_set(dstr, SvLEN(sstr));
2871 SvCUR_set(dstr, SvCUR(sstr));
f4e86e0f 2872
79072805 2873 SvTEMP_off(dstr);
2b1c7e3e 2874 (void)SvOK_off(sstr); /* NOTE: nukes most SvFLAGS on sstr */
79072805
LW		 2875 SvPV_set(sstr, Nullch);
2876 SvLEN_set(sstr, 0);
a5f75d66
AD		 2877 SvCUR_set(sstr, 0);
2878 SvTEMP_off(sstr);
79072805
LW		 2879 }
2880 else { /* have to copy actual string */
8990e307
LW		 2881 STRLEN len = SvCUR(sstr);
2882
2883 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
2884 Move(SvPVX(sstr),SvPVX(dstr),len,char);
2885 SvCUR_set(dstr, len);
2886 *SvEND(dstr) = '\0';
a0d0e21e 2887 (void)SvPOK_only(dstr);
79072805 2888 }
3aa33fe5 2889 if ((sflags & SVf_UTF8) && !IN_BYTE)
a7cb1f99 2890 SvUTF8_on(dstr);
79072805 2891 /*SUPPRESS 560*/
8990e307 2892 if (sflags & SVp_NOK) {
79072805 2893 SvNOK_on(dstr);
463ee0b2 2894 SvNVX(dstr) = SvNVX(sstr);
79072805 2895 }
8990e307 2896 if (sflags & SVp_IOK) {
a0d0e21e 2897 (void)SvIOK_on(dstr);
463ee0b2 2898 SvIVX(dstr) = SvIVX(sstr);
2b1c7e3e 2899 if (sflags & SVf_IVisUV)
25da4f38 2900 SvIsUV_on(dstr);
79072805
LW		 2901 }
2902 }
8990e307 2903 else if (sflags & SVp_NOK) {
463ee0b2 2904 SvNVX(dstr) = SvNVX(sstr);
a0d0e21e 2905 (void)SvNOK_only(dstr);
2b1c7e3e 2906 if (sflags & SVf_IOK) {
a0d0e21e 2907 (void)SvIOK_on(dstr);
463ee0b2 2908 SvIVX(dstr) = SvIVX(sstr);
25da4f38 2909 /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */
2b1c7e3e 2910 if (sflags & SVf_IVisUV)
25da4f38 2911 SvIsUV_on(dstr);
79072805
LW		 2912 }
2913 }
8990e307 2914 else if (sflags & SVp_IOK) {
a0d0e21e 2915 (void)SvIOK_only(dstr);
463ee0b2 2916 SvIVX(dstr) = SvIVX(sstr);
2b1c7e3e 2917 if (sflags & SVf_IVisUV)
25da4f38 2918 SvIsUV_on(dstr);
79072805
LW		 2919 }
2920 else {
20408e3c 2921 if (dtype == SVt_PVGV) {
e476b1b5
GS		 2922 if (ckWARN(WARN_MISC))
2923 Perl_warner(aTHX_ WARN_MISC, "Undefined value assigned to typeglob");
20408e3c
GS		 2924 }
2925 else
2926 (void)SvOK_off(dstr);
a0d0e21e 2927 }
463ee0b2 2928 SvTAINT(dstr);
79072805
LW		 2929}
2930
954c1994
GS		 2931/*
2932=for apidoc sv_setsv_mg
2933
2934Like C<sv_setsv>, but also handles 'set' magic.
2935
2936=cut
2937*/
2938
79072805 2939void
864dbfa3 2940Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr)
ef50df4b
GS		 2941{
2942 sv_setsv(dstr,sstr);
2943 SvSETMAGIC(dstr);
2944}
2945
954c1994
GS		 2946/*
2947=for apidoc sv_setpvn
2948
2949Copies a string into an SV. The C<len> parameter indicates the number of
2950bytes to be copied. Does not handle 'set' magic. See C<sv_setpvn_mg>.
2951
2952=cut
2953*/
2954
ef50df4b 2955void
864dbfa3 2956Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
79072805 2957{
c6f8c383 2958 register char *dptr;
4561caa4
CS		 2959 assert(len >= 0); /* STRLEN is probably unsigned, so this may
2960 elicit a warning, but it won't hurt. */
2213622d 2961 SV_CHECK_THINKFIRST(sv);
463ee0b2 2962 if (!ptr) {
a0d0e21e 2963 (void)SvOK_off(sv);
463ee0b2
LW		 2964 return;
2965 }
6fc92669 2966 (void)SvUPGRADE(sv, SVt_PV);
c6f8c383 2967
79072805 2968 SvGROW(sv, len + 1);
c6f8c383
GA		 2969 dptr = SvPVX(sv);
2970 Move(ptr,dptr,len,char);
2971 dptr[len] = '\0';
79072805 2972 SvCUR_set(sv, len);
a0d0e21e 2973 (void)SvPOK_only(sv); /* validate pointer */
463ee0b2 2974 SvTAINT(sv);
79072805
LW		 2975}
2976
954c1994
GS		 2977/*
2978=for apidoc sv_setpvn_mg
2979
2980Like C<sv_setpvn>, but also handles 'set' magic.
2981
2982=cut
2983*/
2984
79072805 2985void
864dbfa3 2986Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
ef50df4b
GS		 2987{
2988 sv_setpvn(sv,ptr,len);
2989 SvSETMAGIC(sv);
2990}
2991
954c1994
GS		 2992/*
2993=for apidoc sv_setpv
2994
2995Copies a string into an SV. The string must be null-terminated. Does not
2996handle 'set' magic. See C<sv_setpv_mg>.
2997
2998=cut
2999*/
3000
ef50df4b 3001void
864dbfa3 3002Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr)
79072805
LW		 3003{
3004 register STRLEN len;
3005
2213622d 3006 SV_CHECK_THINKFIRST(sv);
463ee0b2 3007 if (!ptr) {
a0d0e21e 3008 (void)SvOK_off(sv);
463ee0b2
LW		 3009 return;
3010 }
79072805 3011 len = strlen(ptr);
6fc92669 3012 (void)SvUPGRADE(sv, SVt_PV);
c6f8c383 3013
79072805 3014 SvGROW(sv, len + 1);
463ee0b2 3015 Move(ptr,SvPVX(sv),len+1,char);
79072805 3016 SvCUR_set(sv, len);
a0d0e21e 3017 (void)SvPOK_only(sv); /* validate pointer */
463ee0b2
LW		 3018 SvTAINT(sv);
3019}
3020
954c1994
GS		 3021/*
3022=for apidoc sv_setpv_mg
3023
3024Like C<sv_setpv>, but also handles 'set' magic.
3025
3026=cut
3027*/
3028
463ee0b2 3029void
864dbfa3 3030Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
ef50df4b
GS		 3031{
3032 sv_setpv(sv,ptr);
3033 SvSETMAGIC(sv);
3034}
3035
954c1994
GS		 3036/*
3037=for apidoc sv_usepvn
3038
3039Tells an SV to use C<ptr> to find its string value. Normally the string is
1c846c1f 3040stored inside the SV but sv_usepvn allows the SV to use an outside string.
954c1994
GS		 3041The C<ptr> should point to memory that was allocated by C<malloc>. The
3042string length, C<len>, must be supplied. This function will realloc the
3043memory pointed to by C<ptr>, so that pointer should not be freed or used by
3044the programmer after giving it to sv_usepvn. Does not handle 'set' magic.
3045See C<sv_usepvn_mg>.
3046
3047=cut
3048*/
3049
ef50df4b 3050void
864dbfa3 3051Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
463ee0b2 3052{
2213622d 3053 SV_CHECK_THINKFIRST(sv);
c6f8c383 3054 (void)SvUPGRADE(sv, SVt_PV);
463ee0b2 3055 if (!ptr) {
a0d0e21e 3056 (void)SvOK_off(sv);
463ee0b2
LW		 3057 return;
3058 }
a0ed51b3 3059 (void)SvOOK_off(sv);
50483b2c 3060 if (SvPVX(sv) && SvLEN(sv))
463ee0b2
LW		 3061 Safefree(SvPVX(sv));
3062 Renew(ptr, len+1, char);
3063 SvPVX(sv) = ptr;
3064 SvCUR_set(sv, len);
3065 SvLEN_set(sv, len+1);
3066 *SvEND(sv) = '\0';
a0d0e21e 3067 (void)SvPOK_only(sv); /* validate pointer */
463ee0b2 3068 SvTAINT(sv);
79072805
LW		 3069}
3070
954c1994
GS		 3071/*
3072=for apidoc sv_usepvn_mg
3073
3074Like C<sv_usepvn>, but also handles 'set' magic.
3075
3076=cut
3077*/
3078
ef50df4b 3079void
864dbfa3 3080Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
ef50df4b 3081{
51c1089b 3082 sv_usepvn(sv,ptr,len);
ef50df4b
GS		 3083 SvSETMAGIC(sv);
3084}
3085
6fc92669 3086void
864dbfa3 3087Perl_sv_force_normal(pTHX_ register SV *sv)
0f15f207 3088{
2213622d
GA		 3089 if (SvREADONLY(sv)) {
3090 dTHR;
1c846c1f
NIS		 3091 if (SvFAKE(sv)) {
3092 char *pvx = SvPVX(sv);
3093 STRLEN len = SvCUR(sv);
3094 U32 hash = SvUVX(sv);
3095 SvGROW(sv, len + 1);
3096 Move(pvx,SvPVX(sv),len,char);
3097 *SvEND(sv) = '\0';
3098 SvFAKE_off(sv);
3099 SvREADONLY_off(sv);
3100 unsharepvn(pvx,len,hash);
3101 }
3102 else if (PL_curcop != &PL_compiling)
cea2e8a9 3103 Perl_croak(aTHX_ PL_no_modify);
0f15f207 3104 }
2213622d
GA		 3105 if (SvROK(sv))
3106 sv_unref(sv);
6fc92669
GS		 3107 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
3108 sv_unglob(sv);
0f15f207 3109}
1c846c1f 3110
954c1994
GS		 3111/*
3112=for apidoc sv_chop
3113
1c846c1f 3114Efficient removal of characters from the beginning of the string buffer.
954c1994
GS		 3115SvPOK(sv) must be true and the C<ptr> must be a pointer to somewhere inside
3116the string buffer. The C<ptr> becomes the first character of the adjusted
3117string.
3118
3119=cut
3120*/
3121
79072805 3122void
864dbfa3 3123Perl_sv_chop(pTHX_ register SV *sv, register char *ptr) /* like set but assuming ptr is in sv */
1c846c1f
NIS		 3124
3125
79072805
LW		 3126{
3127 register STRLEN delta;
3128
a0d0e21e 3129 if (!ptr || !SvPOKp(sv))
79072805 3130 return;
2213622d 3131 SV_CHECK_THINKFIRST(sv);
79072805
LW		 3132 if (SvTYPE(sv) < SVt_PVIV)
3133 sv_upgrade(sv,SVt_PVIV);
3134
3135 if (!SvOOK(sv)) {
50483b2c
JD		 3136 if (!SvLEN(sv)) { /* make copy of shared string */
3137 char *pvx = SvPVX(sv);
3138 STRLEN len = SvCUR(sv);
3139 SvGROW(sv, len + 1);
3140 Move(pvx,SvPVX(sv),len,char);
3141 *SvEND(sv) = '\0';
3142 }
463ee0b2 3143 SvIVX(sv) = 0;
79072805
LW		 3144 SvFLAGS(sv) |= SVf_OOK;
3145 }
25da4f38 3146 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVp_IOK|SVp_NOK|SVf_IVisUV);
463ee0b2 3147 delta = ptr - SvPVX(sv);
79072805
LW		 3148 SvLEN(sv) -= delta;
3149 SvCUR(sv) -= delta;
463ee0b2
LW		 3150 SvPVX(sv) += delta;
3151 SvIVX(sv) += delta;
79072805
LW		 3152}
3153
954c1994
GS		 3154/*
3155=for apidoc sv_catpvn
3156
3157Concatenates the string onto the end of the string which is in the SV. The
3158C<len> indicates number of bytes to copy. Handles 'get' magic, but not
3159'set' magic. See C<sv_catpvn_mg>.
3160
3161=cut
3162*/
3163
79072805 3164void
864dbfa3 3165Perl_sv_catpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
79072805 3166{
463ee0b2 3167 STRLEN tlen;
748a9306 3168 char *junk;
a0d0e21e 3169
748a9306 3170 junk = SvPV_force(sv, tlen);
463ee0b2 3171 SvGROW(sv, tlen + len + 1);
4633a7c4
LW		 3172 if (ptr == junk)
3173 ptr = SvPVX(sv);
463ee0b2 3174 Move(ptr,SvPVX(sv)+tlen,len,char);
79072805
LW		 3175 SvCUR(sv) += len;
3176 *SvEND(sv) = '\0';
d41ff1b8 3177 (void)SvPOK_only_UTF8(sv); /* validate pointer */
463ee0b2 3178 SvTAINT(sv);
79072805
LW		 3179}
3180
954c1994
GS		 3181/*
3182=for apidoc sv_catpvn_mg
3183
3184Like C<sv_catpvn>, but also handles 'set' magic.
3185
3186=cut
3187*/
3188
79072805 3189void
864dbfa3 3190Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
ef50df4b
GS		 3191{
3192 sv_catpvn(sv,ptr,len);
3193 SvSETMAGIC(sv);
3194}
3195
954c1994
GS		 3196/*
3197=for apidoc sv_catsv
3198
3199Concatenates the string from SV C<ssv> onto the end of the string in SV
3200C<dsv>. Handles 'get' magic, but not 'set' magic. See C<sv_catsv_mg>.
3201
3202=cut
3203*/
3204
ef50df4b 3205void
864dbfa3 3206Perl_sv_catsv(pTHX_ SV *dstr, register SV *sstr)
79072805
LW		 3207{
3208 char *s;
463ee0b2 3209 STRLEN len;
79072805
LW		 3210 if (!sstr)
3211 return;
155aba94 3212 if ((s = SvPV(sstr, len))) {
e84ff256 3213 if (DO_UTF8(sstr)) {
560a288e 3214 sv_utf8_upgrade(dstr);
e84ff256 3215 sv_catpvn(dstr,s,len);
560a288e 3216 SvUTF8_on(dstr);
e84ff256
GS		 3217 }
3218 else
3219 sv_catpvn(dstr,s,len);
560a288e 3220 }
79072805
LW		 3221}
3222
954c1994
GS		 3223/*
3224=for apidoc sv_catsv_mg
3225
3226Like C<sv_catsv>, but also handles 'set' magic.
3227
3228=cut
3229*/
3230
79072805 3231void
864dbfa3 3232Perl_sv_catsv_mg(pTHX_ SV *dstr, register SV *sstr)
ef50df4b
GS		 3233{
3234 sv_catsv(dstr,sstr);
3235 SvSETMAGIC(dstr);
3236}
3237
954c1994
GS		 3238/*
3239=for apidoc sv_catpv
3240
3241Concatenates the string onto the end of the string which is in the SV.
3242Handles 'get' magic, but not 'set' magic. See C<sv_catpv_mg>.
3243
3244=cut
3245*/
3246
ef50df4b 3247void
864dbfa3 3248Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr)
79072805
LW		 3249{
3250 register STRLEN len;
463ee0b2 3251 STRLEN tlen;
748a9306 3252 char *junk;
79072805 3253
79072805
LW		 3254 if (!ptr)
3255 return;
748a9306 3256 junk = SvPV_force(sv, tlen);
79072805 3257 len = strlen(ptr);
463ee0b2 3258 SvGROW(sv, tlen + len + 1);
4633a7c4
LW		 3259 if (ptr == junk)
3260 ptr = SvPVX(sv);
463ee0b2 3261 Move(ptr,SvPVX(sv)+tlen,len+1,char);
79072805 3262 SvCUR(sv) += len;
d41ff1b8 3263 (void)SvPOK_only_UTF8(sv); /* validate pointer */
463ee0b2 3264 SvTAINT(sv);
79072805
LW		 3265}
3266
954c1994
GS		 3267/*
3268=for apidoc sv_catpv_mg
3269
3270Like C<sv_catpv>, but also handles 'set' magic.
3271
3272=cut
3273*/
3274
ef50df4b 3275void
864dbfa3 3276Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr)
ef50df4b 3277{
51c1089b 3278 sv_catpv(sv,ptr);
ef50df4b
GS		 3279 SvSETMAGIC(sv);
3280}
3281
79072805 3282SV *
864dbfa3 3283Perl_newSV(pTHX_ STRLEN len)
79072805
LW		 3284{
3285 register SV *sv;
1c846c1f 3286
4561caa4 3287 new_SV(sv);
79072805
LW		 3288 if (len) {
3289 sv_upgrade(sv, SVt_PV);
3290 SvGROW(sv, len + 1);
3291 }
3292 return sv;
3293}
3294
1edc1566 3295/* name is assumed to contain an SV* if (name && namelen == HEf_SVKEY) */
3296
954c1994
GS		 3297/*
3298=for apidoc sv_magic
3299
3300Adds magic to an SV.
3301
3302=cut
3303*/
3304
79072805 3305void
864dbfa3 3306Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen)
79072805
LW		 3307{
3308 MAGIC* mg;
1c846c1f 3309
0f15f207
MB		 3310 if (SvREADONLY(sv)) {
3311 dTHR;
3280af22 3312 if (PL_curcop != &PL_compiling && !strchr("gBf", how))
cea2e8a9 3313 Perl_croak(aTHX_ PL_no_modify);
0f15f207 3314 }
4633a7c4 3315 if (SvMAGICAL(sv) || (how == 't' && SvTYPE(sv) >= SVt_PVMG)) {
748a9306
LW		 3316 if (SvMAGIC(sv) && (mg = mg_find(sv, how))) {
3317 if (how == 't')
565764a8 3318 mg->mg_len |= 1;
463ee0b2 3319 return;
748a9306 3320 }
463ee0b2
LW		 3321 }
3322 else {
c6f8c383 3323 (void)SvUPGRADE(sv, SVt_PVMG);
463ee0b2 3324 }
79072805
LW		 3325 Newz(702,mg, 1, MAGIC);
3326 mg->mg_moremagic = SvMAGIC(sv);
463ee0b2 3327
79072805 3328 SvMAGIC(sv) = mg;
c277df42 3329 if (!obj || obj == sv || how == '#' || how == 'r')
8990e307 3330 mg->mg_obj = obj;
85e6fe83 3331 else {
11343788 3332 dTHR;
8990e307 3333 mg->mg_obj = SvREFCNT_inc(obj);
85e6fe83
LW		 3334 mg->mg_flags |= MGf_REFCOUNTED;
3335 }
79072805 3336 mg->mg_type = how;
565764a8 3337 mg->mg_len = namlen;
1edc1566 3338 if (name)
3339 if (namlen >= 0)
3340 mg->mg_ptr = savepvn(name, namlen);
c6ee37c5 3341 else if (namlen == HEf_SVKEY)
1edc1566 3342 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
1c846c1f 3343
79072805
LW		 3344 switch (how) {
3345 case 0:
22c35a8c 3346 mg->mg_virtual = &PL_vtbl_sv;
79072805 3347 break;
a0d0e21e 3348 case 'A':
22c35a8c 3349 mg->mg_virtual = &PL_vtbl_amagic;
a0d0e21e
LW		 3350 break;
3351 case 'a':
22c35a8c 3352 mg->mg_virtual = &PL_vtbl_amagicelem;
a0d0e21e
LW		 3353 break;
3354 case 'c':
3355 mg->mg_virtual = 0;
3356 break;
79072805 3357 case 'B':
22c35a8c 3358 mg->mg_virtual = &PL_vtbl_bm;
79072805 3359 break;
6cef1e77 3360 case 'D':
22c35a8c 3361 mg->mg_virtual = &PL_vtbl_regdata;
6cef1e77
IZ		 3362 break;
3363 case 'd':
22c35a8c 3364 mg->mg_virtual = &PL_vtbl_regdatum;
6cef1e77 3365 break;
79072805 3366 case 'E':
22c35a8c 3367 mg->mg_virtual = &PL_vtbl_env;
79072805 3368 break;
55497cff 3369 case 'f':
22c35a8c 3370 mg->mg_virtual = &PL_vtbl_fm;
55497cff 3371 break;
79072805 3372 case 'e':
22c35a8c 3373 mg->mg_virtual = &PL_vtbl_envelem;
79072805 3374 break;
93a17b20 3375 case 'g':
22c35a8c 3376 mg->mg_virtual = &PL_vtbl_mglob;
93a17b20 3377 break;
463ee0b2 3378 case 'I':
22c35a8c 3379 mg->mg_virtual = &PL_vtbl_isa;
463ee0b2
LW		 3380 break;
3381 case 'i':
22c35a8c 3382 mg->mg_virtual = &PL_vtbl_isaelem;
463ee0b2 3383 break;
16660edb 3384 case 'k':
22c35a8c 3385 mg->mg_virtual = &PL_vtbl_nkeys;
16660edb 3386 break;
79072805 3387 case 'L':
a0d0e21e 3388 SvRMAGICAL_on(sv);
93a17b20
LW		 3389 mg->mg_virtual = 0;
3390 break;
3391 case 'l':
22c35a8c 3392 mg->mg_virtual = &PL_vtbl_dbline;
79072805 3393 break;
f93b4edd
MB		 3394#ifdef USE_THREADS
3395 case 'm':
22c35a8c 3396 mg->mg_virtual = &PL_vtbl_mutex;
f93b4edd
MB		 3397 break;
3398#endif /* USE_THREADS */
36477c24 3399#ifdef USE_LOCALE_COLLATE
bbce6d69 3400 case 'o':
22c35a8c 3401 mg->mg_virtual = &PL_vtbl_collxfrm;
bbce6d69 3402 break;
36477c24 3403#endif /* USE_LOCALE_COLLATE */
463ee0b2 3404 case 'P':
22c35a8c 3405 mg->mg_virtual = &PL_vtbl_pack;
463ee0b2
LW		 3406 break;
3407 case 'p':
a0d0e21e 3408 case 'q':
22c35a8c 3409 mg->mg_virtual = &PL_vtbl_packelem;
463ee0b2 3410 break;
c277df42 3411 case 'r':
22c35a8c 3412 mg->mg_virtual = &PL_vtbl_regexp;
c277df42 3413 break;
79072805 3414 case 'S':
22c35a8c 3415 mg->mg_virtual = &PL_vtbl_sig;
79072805
LW		 3416 break;
3417 case 's':
22c35a8c 3418 mg->mg_virtual = &PL_vtbl_sigelem;
79072805 3419 break;
463ee0b2 3420 case 't':
22c35a8c 3421 mg->mg_virtual = &PL_vtbl_taint;
565764a8 3422 mg->mg_len = 1;
463ee0b2 3423 break;
79072805 3424 case 'U':
22c35a8c 3425 mg->mg_virtual = &PL_vtbl_uvar;
79072805
LW		 3426 break;
3427 case 'v':
22c35a8c 3428 mg->mg_virtual = &PL_vtbl_vec;
79072805
LW		 3429 break;
3430 case 'x':
22c35a8c 3431 mg->mg_virtual = &PL_vtbl_substr;
79072805 3432 break;
5f05dabc 3433 case 'y':
22c35a8c 3434 mg->mg_virtual = &PL_vtbl_defelem;
5f05dabc 3435 break;
79072805 3436 case '*':
22c35a8c 3437 mg->mg_virtual = &PL_vtbl_glob;
79072805
LW		 3438 break;
3439 case '#':
22c35a8c 3440 mg->mg_virtual = &PL_vtbl_arylen;
79072805 3441 break;
a0d0e21e 3442 case '.':
22c35a8c 3443 mg->mg_virtual = &PL_vtbl_pos;
a0d0e21e 3444 break;
810b8aa5
GS		 3445 case '<':
3446 mg->mg_virtual = &PL_vtbl_backref;
3447 break;
4633a7c4
LW		 3448 case '~': /* Reserved for use by extensions not perl internals. */
3449 /* Useful for attaching extension internal data to perl vars. */
3450 /* Note that multiple extensions may clash if magical scalars */
3451 /* etc holding private data from one are passed to another. */
3452 SvRMAGICAL_on(sv);
a0d0e21e 3453 break;
79072805 3454 default:
cea2e8a9 3455 Perl_croak(aTHX_ "Don't know how to handle magic of type '%c'", how);
463ee0b2 3456 }
8990e307
LW		 3457 mg_magical(sv);
3458 if (SvGMAGICAL(sv))
3459 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
463ee0b2
LW		 3460}
3461
c461cf8f
JH		 3462/*
3463=for apidoc sv_unmagic
3464
3465Removes magic from an SV.
3466
3467=cut
3468*/
3469
463ee0b2 3470int
864dbfa3 3471Perl_sv_unmagic(pTHX_ SV *sv, int type)
463ee0b2
LW		 3472{
3473 MAGIC* mg;
3474 MAGIC** mgp;
91bba347 3475 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
463ee0b2
LW		 3476 return 0;
3477 mgp = &SvMAGIC(sv);
3478 for (mg = *mgp; mg; mg = *mgp) {
3479 if (mg->mg_type == type) {
3480 MGVTBL* vtbl = mg->mg_virtual;
3481 *mgp = mg->mg_moremagic;
1d7c1841 3482 if (vtbl && vtbl->svt_free)
fc0dc3b3 3483 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
463ee0b2 3484 if (mg->mg_ptr && mg->mg_type != 'g')
565764a8 3485 if (mg->mg_len >= 0)
1edc1566 3486 Safefree(mg->mg_ptr);
565764a8 3487 else if (mg->mg_len == HEf_SVKEY)
1edc1566 3488 SvREFCNT_dec((SV*)mg->mg_ptr);
a0d0e21e
LW		 3489 if (mg->mg_flags & MGf_REFCOUNTED)
3490 SvREFCNT_dec(mg->mg_obj);
463ee0b2
LW		 3491 Safefree(mg);
3492 }
3493 else
3494 mgp = &mg->mg_moremagic;
79072805 3495 }
91bba347 3496 if (!SvMAGIC(sv)) {
463ee0b2 3497 SvMAGICAL_off(sv);
8990e307 3498 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
463ee0b2
LW		 3499 }
3500
3501 return 0;
79072805
LW		 3502}
3503
c461cf8f
JH		 3504/*
3505=for apidoc sv_rvweaken
3506
3507Weaken a reference.
3508
3509=cut
3510*/
3511
810b8aa5 3512SV *
864dbfa3 3513Perl_sv_rvweaken(pTHX_ SV *sv)
810b8aa5
GS		 3514{
3515 SV *tsv;
3516 if (!SvOK(sv)) /* let undefs pass */
3517 return sv;
3518 if (!SvROK(sv))
cea2e8a9 3519 Perl_croak(aTHX_ "Can't weaken a nonreference");
810b8aa5
GS		 3520 else if (SvWEAKREF(sv)) {
3521 dTHR;
3522 if (ckWARN(WARN_MISC))
cea2e8a9 3523 Perl_warner(aTHX_ WARN_MISC, "Reference is already weak");
810b8aa5
GS		 3524 return sv;
3525 }
3526 tsv = SvRV(sv);
3527 sv_add_backref(tsv, sv);
3528 SvWEAKREF_on(sv);
1c846c1f 3529 SvREFCNT_dec(tsv);
810b8aa5
GS		 3530 return sv;
3531}
3532
3533STATIC void
cea2e8a9 3534S_sv_add_backref(pTHX_ SV *tsv, SV *sv)
810b8aa5
GS		 3535{
3536 AV *av;
3537 MAGIC *mg;
3538 if (SvMAGICAL(tsv) && (mg = mg_find(tsv, '<')))
3539 av = (AV*)mg->mg_obj;
3540 else {
3541 av = newAV();
3542 sv_magic(tsv, (SV*)av, '<', NULL, 0);
3543 SvREFCNT_dec(av); /* for sv_magic */
3544 }
3545 av_push(av,sv);
3546}
3547
1c846c1f 3548STATIC void
cea2e8a9 3549S_sv_del_backref(pTHX_ SV *sv)
810b8aa5
GS		 3550{
3551 AV *av;
3552 SV **svp;
3553 I32 i;
3554 SV *tsv = SvRV(sv);
3555 MAGIC *mg;
3556 if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, '<')))
cea2e8a9 3557 Perl_croak(aTHX_ "panic: del_backref");
810b8aa5
GS		 3558 av = (AV *)mg->mg_obj;
3559 svp = AvARRAY(av);
3560 i = AvFILLp(av);
3561 while (i >= 0) {
3562 if (svp[i] == sv) {
3563 svp[i] = &PL_sv_undef; /* XXX */
3564 }
3565 i--;
3566 }
3567}
3568
954c1994
GS		 3569/*
3570=for apidoc sv_insert
3571
3572Inserts a string at the specified offset/length within the SV. Similar to
3573the Perl substr() function.
3574
3575=cut
3576*/
3577
79072805 3578void
864dbfa3 3579Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
79072805
LW		 3580{
3581 register char *big;
3582 register char *mid;
3583 register char *midend;
3584 register char *bigend;
3585 register I32 i;
6ff81951 3586 STRLEN curlen;
1c846c1f 3587
79072805 3588
8990e307 3589 if (!bigstr)
cea2e8a9 3590 Perl_croak(aTHX_ "Can't modify non-existent substring");
6ff81951 3591 SvPV_force(bigstr, curlen);
60fa28ff 3592 (void)SvPOK_only_UTF8(bigstr);
6ff81951
GS		 3593 if (offset + len > curlen) {
3594 SvGROW(bigstr, offset+len+1);
3595 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
3596 SvCUR_set(bigstr, offset+len);
3597 }
79072805 3598
69b47968 3599 SvTAINT(bigstr);
79072805
LW		 3600 i = littlelen - len;
3601 if (i > 0) { /* string might grow */
a0d0e21e 3602 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
79072805
LW		 3603 mid = big + offset + len;
3604 midend = bigend = big + SvCUR(bigstr);
3605 bigend += i;
3606 *bigend = '\0';
3607 while (midend > mid) /* shove everything down */
3608 *--bigend = *--midend;
3609 Move(little,big+offset,littlelen,char);
3610 SvCUR(bigstr) += i;
3611 SvSETMAGIC(bigstr);
3612 return;
3613 }
3614 else if (i == 0) {
463ee0b2 3615 Move(little,SvPVX(bigstr)+offset,len,char);
79072805
LW		 3616 SvSETMAGIC(bigstr);
3617 return;
3618 }
3619
463ee0b2 3620 big = SvPVX(bigstr);
79072805
LW		 3621 mid = big + offset;
3622 midend = mid + len;
3623 bigend = big + SvCUR(bigstr);
3624
3625 if (midend > bigend)
cea2e8a9 3626 Perl_croak(aTHX_ "panic: sv_insert");
79072805
LW		 3627
3628 if (mid - big > bigend - midend) { /* faster to shorten from end */
3629 if (littlelen) {
3630 Move(little, mid, littlelen,char);
3631 mid += littlelen;
3632 }
3633 i = bigend - midend;
3634 if (i > 0) {
3635 Move(midend, mid, i,char);
3636 mid += i;
3637 }
3638 *mid = '\0';
3639 SvCUR_set(bigstr, mid - big);
3640 }
3641 /*SUPPRESS 560*/
155aba94 3642 else if ((i = mid - big)) { /* faster from front */
79072805
LW		 3643 midend -= littlelen;
3644 mid = midend;
3645 sv_chop(bigstr,midend-i);
3646 big += i;
3647 while (i--)
3648 *--midend = *--big;
3649 if (littlelen)
3650 Move(little, mid, littlelen,char);
3651 }
3652 else if (littlelen) {
3653 midend -= littlelen;
3654 sv_chop(bigstr,midend);
3655 Move(little,midend,littlelen,char);
3656 }
3657 else {
3658 sv_chop(bigstr,midend);
3659 }
3660 SvSETMAGIC(bigstr);
3661}
3662
c461cf8f
JH		 3663/*
3664=for apidoc sv_replace
3665
3666Make the first argument a copy of the second, then delete the original.
3667
3668=cut
3669*/
79072805
LW		 3670
3671void
864dbfa3 3672Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv)
79072805 3673{
0453d815 3674 dTHR;
79072805 3675 U32 refcnt = SvREFCNT(sv);
2213622d 3676 SV_CHECK_THINKFIRST(sv);
0453d815
PM		 3677 if (SvREFCNT(nsv) != 1 && ckWARN_d(WARN_INTERNAL))
3678 Perl_warner(aTHX_ WARN_INTERNAL, "Reference miscount in sv_replace()");
93a17b20 3679 if (SvMAGICAL(sv)) {
a0d0e21e
LW		 3680 if (SvMAGICAL(nsv))
3681 mg_free(nsv);
3682 else
3683 sv_upgrade(nsv, SVt_PVMG);
93a17b20 3684 SvMAGIC(nsv) = SvMAGIC(sv);
a0d0e21e 3685 SvFLAGS(nsv) |= SvMAGICAL(sv);
93a17b20
LW		 3686 SvMAGICAL_off(sv);
3687 SvMAGIC(sv) = 0;
3688 }
79072805
LW		 3689 SvREFCNT(sv) = 0;
3690 sv_clear(sv);
477f5d66 3691 assert(!SvREFCNT(sv));
79072805
LW		 3692 StructCopy(nsv,sv,SV);
3693 SvREFCNT(sv) = refcnt;
1edc1566 3694 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
463ee0b2 3695 del_SV(nsv);
79072805
LW		 3696}
3697
c461cf8f
JH		 3698/*
3699=for apidoc sv_clear
3700
3701Clear an SV, making it empty. Does not free the memory used by the SV
3702itself.
3703
3704=cut
3705*/
3706
79072805 3707void
864dbfa3 3708Perl_sv_clear(pTHX_ register SV *sv)
79072805 3709{
ec12f114 3710 HV* stash;
79072805
LW		 3711 assert(sv);
3712 assert(SvREFCNT(sv) == 0);
3713
ed6116ce 3714 if (SvOBJECT(sv)) {
e858de61 3715 dTHR;
3280af22 3716 if (PL_defstash) { /* Still have a symbol table? */
4e35701f 3717 djSP;
8ebc5c01 3718 GV* destructor;
837485b6 3719 SV tmpref;
a0d0e21e 3720
837485b6
GS		 3721 Zero(&tmpref, 1, SV);
3722 sv_upgrade(&tmpref, SVt_RV);