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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:
411caa50
JH		 1288 Perl_croak(aTHX_ "Can't coerce %s to integer in %s", sv_reftype(sv,0),
1289 PL_op_desc[PL_op->op_type]);
463ee0b2 1290 }
a0d0e21e 1291 (void)SvIOK_only(sv); /* validate number */
a5f75d66 1292 SvIVX(sv) = i;
463ee0b2 1293 SvTAINT(sv);
79072805
LW		 1294}
1295
954c1994
GS		 1296/*
1297=for apidoc sv_setiv_mg
1298
1299Like C<sv_setiv>, but also handles 'set' magic.
1300
1301=cut
1302*/
1303
79072805 1304void
864dbfa3 1305Perl_sv_setiv_mg(pTHX_ register SV *sv, IV i)
ef50df4b
GS		 1306{
1307 sv_setiv(sv,i);
1308 SvSETMAGIC(sv);
1309}
1310
954c1994
GS		 1311/*
1312=for apidoc sv_setuv
1313
1314Copies an unsigned integer into the given SV. Does not handle 'set' magic.
1315See C<sv_setuv_mg>.
1316
1317=cut
1318*/
1319
ef50df4b 1320void
864dbfa3 1321Perl_sv_setuv(pTHX_ register SV *sv, UV u)
55497cff 1322{
25da4f38
IZ		 1323 sv_setiv(sv, 0);
1324 SvIsUV_on(sv);
1325 SvUVX(sv) = u;
55497cff 1326}
1327
954c1994
GS		 1328/*
1329=for apidoc sv_setuv_mg
1330
1331Like C<sv_setuv>, but also handles 'set' magic.
1332
1333=cut
1334*/
1335
55497cff 1336void
864dbfa3 1337Perl_sv_setuv_mg(pTHX_ register SV *sv, UV u)
ef50df4b
GS		 1338{
1339 sv_setuv(sv,u);
1340 SvSETMAGIC(sv);
1341}
1342
954c1994
GS		 1343/*
1344=for apidoc sv_setnv
1345
1346Copies a double into the given SV. Does not handle 'set' magic. See
1347C<sv_setnv_mg>.
1348
1349=cut
1350*/
1351
ef50df4b 1352void
65202027 1353Perl_sv_setnv(pTHX_ register SV *sv, NV num)
79072805 1354{
2213622d 1355 SV_CHECK_THINKFIRST(sv);
a0d0e21e
LW		 1356 switch (SvTYPE(sv)) {
1357 case SVt_NULL:
1358 case SVt_IV:
79072805 1359 sv_upgrade(sv, SVt_NV);
a0d0e21e 1360 break;
a0d0e21e
LW		 1361 case SVt_RV:
1362 case SVt_PV:
1363 case SVt_PVIV:
79072805 1364 sv_upgrade(sv, SVt_PVNV);
a0d0e21e 1365 break;
827b7e14 1366
a0d0e21e 1367 case SVt_PVGV:
a0d0e21e
LW		 1368 case SVt_PVAV:
1369 case SVt_PVHV:
1370 case SVt_PVCV:
1371 case SVt_PVFM:
1372 case SVt_PVIO:
411caa50
JH		 1373 Perl_croak(aTHX_ "Can't coerce %s to number in %s", sv_reftype(sv,0),
1374 PL_op_name[PL_op->op_type]);
79072805 1375 }
463ee0b2 1376 SvNVX(sv) = num;
a0d0e21e 1377 (void)SvNOK_only(sv); /* validate number */
463ee0b2 1378 SvTAINT(sv);
79072805
LW		 1379}
1380
954c1994
GS		 1381/*
1382=for apidoc sv_setnv_mg
1383
1384Like C<sv_setnv>, but also handles 'set' magic.
1385
1386=cut
1387*/
1388
ef50df4b 1389void
65202027 1390Perl_sv_setnv_mg(pTHX_ register SV *sv, NV num)
ef50df4b
GS		 1391{
1392 sv_setnv(sv,num);
1393 SvSETMAGIC(sv);
1394}
1395
76e3520e 1396STATIC void
cea2e8a9 1397S_not_a_number(pTHX_ SV *sv)
a0d0e21e
LW		 1398{
1399 char tmpbuf[64];
1400 char *d = tmpbuf;
1401 char *s;
dc28f22b
GA		 1402 char *limit = tmpbuf + sizeof(tmpbuf) - 8;
1403 /* each *s can expand to 4 chars + "...\0",
1404 i.e. need room for 8 chars */
a0d0e21e 1405
dc28f22b 1406 for (s = SvPVX(sv); *s && d < limit; s++) {
bbce6d69 1407 int ch = *s & 0xFF;
1408 if (ch & 128 && !isPRINT_LC(ch)) {
a0d0e21e
LW		 1409 *d++ = 'M';
1410 *d++ = '-';
1411 ch &= 127;
1412 }
bbce6d69 1413 if (ch == '\n') {
1414 *d++ = '\\';
1415 *d++ = 'n';
1416 }
1417 else if (ch == '\r') {
1418 *d++ = '\\';
1419 *d++ = 'r';
1420 }
1421 else if (ch == '\f') {
1422 *d++ = '\\';
1423 *d++ = 'f';
1424 }
1425 else if (ch == '\\') {
1426 *d++ = '\\';
1427 *d++ = '\\';
1428 }
1429 else if (isPRINT_LC(ch))
a0d0e21e
LW		 1430 *d++ = ch;
1431 else {
1432 *d++ = '^';
bbce6d69 1433 *d++ = toCTRL(ch);
a0d0e21e
LW		 1434 }
1435 }
1436 if (*s) {
1437 *d++ = '.';
1438 *d++ = '.';
1439 *d++ = '.';
1440 }
1441 *d = '\0';
1442
533c011a 1443 if (PL_op)
42d38218
MS		 1444 Perl_warner(aTHX_ WARN_NUMERIC,
1445 "Argument \"%s\" isn't numeric in %s", tmpbuf,
1446 PL_op_desc[PL_op->op_type]);
a0d0e21e 1447 else
42d38218
MS		 1448 Perl_warner(aTHX_ WARN_NUMERIC,
1449 "Argument \"%s\" isn't numeric", tmpbuf);
a0d0e21e
LW		 1450}
1451
cf2093f6 1452/* the number can be converted to integer with atol() or atoll() */
25da4f38
IZ		 1453#define IS_NUMBER_TO_INT_BY_ATOL 0x01
1454#define IS_NUMBER_TO_INT_BY_ATOF 0x02 /* atol() may be != atof() */
1455#define IS_NUMBER_NOT_IV 0x04 /* (IV)atof() may be != atof() */
1456#define IS_NUMBER_NEG 0x08 /* not good to cache UV */
300aed98 1457#define IS_NUMBER_INFINITY 0x10 /* this is big */
25da4f38
IZ		 1458
1459/* Actually, ISO C leaves conversion of UV to IV undefined, but
1460 until proven guilty, assume that things are not that bad... */
1461
a0d0e21e 1462IV
864dbfa3 1463Perl_sv_2iv(pTHX_ register SV *sv)
79072805
LW		 1464{
1465 if (!sv)
1466 return 0;
8990e307 1467 if (SvGMAGICAL(sv)) {
463ee0b2
LW		 1468 mg_get(sv);
1469 if (SvIOKp(sv))
1470 return SvIVX(sv);
748a9306 1471 if (SvNOKp(sv)) {
25da4f38 1472 return I_V(SvNVX(sv));
748a9306 1473 }
36477c24 1474 if (SvPOKp(sv) && SvLEN(sv))
1475 return asIV(sv);
3fe9a6f1 1476 if (!SvROK(sv)) {
d008e5eb 1477 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
d008e5eb 1478 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 1479 report_uninit();
c6ee37c5 1480 }
36477c24 1481 return 0;
3fe9a6f1 1482 }
463ee0b2 1483 }
ed6116ce 1484 if (SvTHINKFIRST(sv)) {
a0d0e21e 1485 if (SvROK(sv)) {
a0d0e21e 1486 SV* tmpstr;
1554e226
DC		 1487 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
1488 (SvRV(tmpstr) != SvRV(sv)))
9e7bc3e8 1489 return SvIV(tmpstr);
56431972 1490 return PTR2IV(SvRV(sv));
a0d0e21e 1491 }
47deb5e7
NIS		 1492 if (SvREADONLY(sv) && SvFAKE(sv)) {
1493 sv_force_normal(sv);
1494 }
0336b60e 1495 if (SvREADONLY(sv) && !SvOK(sv)) {
0336b60e 1496 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 1497 report_uninit();
ed6116ce
LW		 1498 return 0;
1499 }
79072805 1500 }
25da4f38
IZ		 1501 if (SvIOKp(sv)) {
1502 if (SvIsUV(sv)) {
1503 return (IV)(SvUVX(sv));
1504 }
1505 else {
1506 return SvIVX(sv);
1507 }
463ee0b2 1508 }
748a9306 1509 if (SvNOKp(sv)) {
25da4f38
IZ		 1510 /* We can cache the IV/UV value even if it not good enough
1511 * to reconstruct NV, since the conversion to PV will prefer
cf2093f6 1512 * NV over IV/UV.
25da4f38
IZ		 1513 */
1514
1515 if (SvTYPE(sv) == SVt_NV)
1516 sv_upgrade(sv, SVt_PVNV);
1517
a5f75d66 1518 (void)SvIOK_on(sv);
65202027 1519 if (SvNVX(sv) < (NV)IV_MAX + 0.5)
748a9306 1520 SvIVX(sv) = I_V(SvNVX(sv));
25da4f38 1521 else {
ff68c719 1522 SvUVX(sv) = U_V(SvNVX(sv));
25da4f38
IZ		 1523 SvIsUV_on(sv);
1524 ret_iv_max:
1c846c1f 1525 DEBUG_c(PerlIO_printf(Perl_debug_log,
57def98f 1526 "0x%"UVxf" 2iv(%"UVuf" => %"IVdf") (as unsigned)\n",
56431972 1527 PTR2UV(sv),
57def98f
JH		 1528 SvUVX(sv),
1529 SvUVX(sv)));
25da4f38
IZ		 1530 return (IV)SvUVX(sv);
1531 }
748a9306
LW		 1532 }
1533 else if (SvPOKp(sv) && SvLEN(sv)) {
25da4f38
IZ		 1534 I32 numtype = looks_like_number(sv);
1535
1536 /* We want to avoid a possible problem when we cache an IV which
1537 may be later translated to an NV, and the resulting NV is not
1538 the translation of the initial data.
1c846c1f 1539
25da4f38
IZ		 1540 This means that if we cache such an IV, we need to cache the
1541 NV as well. Moreover, we trade speed for space, and do not
1542 cache the NV if not needed.
1543 */
1544 if (numtype & IS_NUMBER_NOT_IV) {
1545 /* May be not an integer. Need to cache NV if we cache IV
1546 * - otherwise future conversion to NV will be wrong. */
65202027 1547 NV d;
25da4f38 1548
097ee67d 1549 d = Atof(SvPVX(sv));
25da4f38
IZ		 1550
1551 if (SvTYPE(sv) < SVt_PVNV)
1552 sv_upgrade(sv, SVt_PVNV);
1553 SvNVX(sv) = d;
1554 (void)SvNOK_on(sv);
1555 (void)SvIOK_on(sv);
65202027 1556#if defined(USE_LONG_DOUBLE)
1d7c1841
GS		 1557 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
1558 PTR2UV(sv), SvNVX(sv)));
65202027 1559#else
1d7c1841
GS		 1560 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%g)\n",
1561 PTR2UV(sv), SvNVX(sv)));
65202027 1562#endif
65202027 1563 if (SvNVX(sv) < (NV)IV_MAX + 0.5)
25da4f38
IZ		 1564 SvIVX(sv) = I_V(SvNVX(sv));
1565 else {
1566 SvUVX(sv) = U_V(SvNVX(sv));
1567 SvIsUV_on(sv);
1568 goto ret_iv_max;
1569 }
1570 }
0a3ece55
MG		 1571 else { /* The NV may be reconstructed from IV - safe to cache IV,
1572 which may be calculated by atol(). */
25da4f38
IZ		 1573 if (SvTYPE(sv) < SVt_PVIV)
1574 sv_upgrade(sv, SVt_PVIV);
25da4f38 1575 (void)SvIOK_on(sv);
0a3ece55
MG		 1576 SvIVX(sv) = Atol(SvPVX(sv));
1577 if (! numtype && ckWARN(WARN_NUMERIC))
25da4f38
IZ		 1578 not_a_number(sv);
1579 }
93a17b20 1580 }
79072805 1581 else {
599cee73 1582 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
1d7c1841 1583 report_uninit();
25da4f38
IZ		 1584 if (SvTYPE(sv) < SVt_IV)
1585 /* Typically the caller expects that sv_any is not NULL now. */
1586 sv_upgrade(sv, SVt_IV);
a0d0e21e 1587 return 0;
79072805 1588 }
1d7c1841
GS		 1589 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"IVdf")\n",
1590 PTR2UV(sv),SvIVX(sv)));
25da4f38 1591 return SvIsUV(sv) ? (IV)SvUVX(sv) : SvIVX(sv);
79072805
LW		 1592}
1593
ff68c719 1594UV
864dbfa3 1595Perl_sv_2uv(pTHX_ register SV *sv)
ff68c719 1596{
1597 if (!sv)
1598 return 0;
1599 if (SvGMAGICAL(sv)) {
1600 mg_get(sv);
1601 if (SvIOKp(sv))
1602 return SvUVX(sv);
1603 if (SvNOKp(sv))
1604 return U_V(SvNVX(sv));
36477c24 1605 if (SvPOKp(sv) && SvLEN(sv))
1606 return asUV(sv);
3fe9a6f1 1607 if (!SvROK(sv)) {
d008e5eb 1608 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
d008e5eb 1609 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 1610 report_uninit();
c6ee37c5 1611 }
36477c24 1612 return 0;
3fe9a6f1 1613 }
ff68c719 1614 }
1615 if (SvTHINKFIRST(sv)) {
1616 if (SvROK(sv)) {
ff68c719 1617 SV* tmpstr;
1554e226
DC		 1618 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
1619 (SvRV(tmpstr) != SvRV(sv)))
9e7bc3e8 1620 return SvUV(tmpstr);
56431972 1621 return PTR2UV(SvRV(sv));
ff68c719 1622 }
0336b60e 1623 if (SvREADONLY(sv) && !SvOK(sv)) {
0336b60e 1624 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 1625 report_uninit();
ff68c719 1626 return 0;
1627 }
1628 }
25da4f38
IZ		 1629 if (SvIOKp(sv)) {
1630 if (SvIsUV(sv)) {
1631 return SvUVX(sv);
1632 }
1633 else {
1634 return (UV)SvIVX(sv);
1635 }
ff68c719 1636 }
1637 if (SvNOKp(sv)) {
25da4f38
IZ		 1638 /* We can cache the IV/UV value even if it not good enough
1639 * to reconstruct NV, since the conversion to PV will prefer
cf2093f6 1640 * NV over IV/UV.
25da4f38
IZ		 1641 */
1642 if (SvTYPE(sv) == SVt_NV)
1643 sv_upgrade(sv, SVt_PVNV);
ff68c719 1644 (void)SvIOK_on(sv);
25da4f38
IZ		 1645 if (SvNVX(sv) >= -0.5) {
1646 SvIsUV_on(sv);
1647 SvUVX(sv) = U_V(SvNVX(sv));
1648 }
1649 else {
1650 SvIVX(sv) = I_V(SvNVX(sv));
1651 ret_zero:
1c846c1f 1652 DEBUG_c(PerlIO_printf(Perl_debug_log,
07270b1a 1653 "0x%"UVxf" 2uv(%"IVdf" => %"IVdf") (as signed)\n",
57def98f
JH		 1654 PTR2UV(sv),
1655 SvIVX(sv),
1656 (IV)(UV)SvIVX(sv)));
25da4f38
IZ		 1657 return (UV)SvIVX(sv);
1658 }
ff68c719 1659 }
1660 else if (SvPOKp(sv) && SvLEN(sv)) {
25da4f38
IZ		 1661 I32 numtype = looks_like_number(sv);
1662
1663 /* We want to avoid a possible problem when we cache a UV which
1664 may be later translated to an NV, and the resulting NV is not
1665 the translation of the initial data.
1c846c1f 1666
25da4f38
IZ		 1667 This means that if we cache such a UV, we need to cache the
1668 NV as well. Moreover, we trade speed for space, and do not
1669 cache the NV if not needed.
1670 */
1671 if (numtype & IS_NUMBER_NOT_IV) {
1672 /* May be not an integer. Need to cache NV if we cache IV
1673 * - otherwise future conversion to NV will be wrong. */
65202027 1674 NV d;
25da4f38 1675
cf2093f6 1676 d = Atof(SvPVX(sv));
25da4f38
IZ		 1677
1678 if (SvTYPE(sv) < SVt_PVNV)
1679 sv_upgrade(sv, SVt_PVNV);
1680 SvNVX(sv) = d;
1681 (void)SvNOK_on(sv);
1682 (void)SvIOK_on(sv);
65202027 1683#if defined(USE_LONG_DOUBLE)
1d7c1841
GS		 1684 DEBUG_c(PerlIO_printf(Perl_debug_log,
1685 "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
1686 PTR2UV(sv), SvNVX(sv)));
65202027 1687#else
1d7c1841
GS		 1688 DEBUG_c(PerlIO_printf(Perl_debug_log,
1689 "0x%"UVxf" 2nv(%g)\n",
1690 PTR2UV(sv), SvNVX(sv)));
65202027 1691#endif
25da4f38
IZ		 1692 if (SvNVX(sv) < -0.5) {
1693 SvIVX(sv) = I_V(SvNVX(sv));
1694 goto ret_zero;
1695 } else {
1696 SvUVX(sv) = U_V(SvNVX(sv));
1697 SvIsUV_on(sv);
1698 }
1699 }
1700 else if (numtype & IS_NUMBER_NEG) {
1701 /* The NV may be reconstructed from IV - safe to cache IV,
1702 which may be calculated by atol(). */
1703 if (SvTYPE(sv) == SVt_PV)
1704 sv_upgrade(sv, SVt_PVIV);
1705 (void)SvIOK_on(sv);
cf2093f6 1706 SvIVX(sv) = (IV)Atol(SvPVX(sv));
25da4f38
IZ		 1707 }
1708 else if (numtype) { /* Non-negative */
1709 /* The NV may be reconstructed from UV - safe to cache UV,
1710 which may be calculated by strtoul()/atol. */
1711 if (SvTYPE(sv) == SVt_PV)
1712 sv_upgrade(sv, SVt_PVIV);
1713 (void)SvIOK_on(sv);
1714 (void)SvIsUV_on(sv);
1715#ifdef HAS_STRTOUL
cf2093f6 1716 SvUVX(sv) = Strtoul(SvPVX(sv), Null(char**), 10);
25da4f38
IZ		 1717#else /* no atou(), but we know the number fits into IV... */
1718 /* The only problem may be if it is negative... */
cf2093f6 1719 SvUVX(sv) = (UV)Atol(SvPVX(sv));
25da4f38
IZ		 1720#endif
1721 }
1722 else { /* Not a number. Cache 0. */
25da4f38
IZ		 1723 if (SvTYPE(sv) < SVt_PVIV)
1724 sv_upgrade(sv, SVt_PVIV);
25da4f38
IZ		 1725 (void)SvIOK_on(sv);
1726 (void)SvIsUV_on(sv);
7b9e3c00
GS		 1727 SvUVX(sv) = 0; /* We assume that 0s have the
1728 same bitmap in IV and UV. */
25da4f38
IZ		 1729 if (ckWARN(WARN_NUMERIC))
1730 not_a_number(sv);
1731 }
ff68c719 1732 }
1733 else {
d008e5eb 1734 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
d008e5eb 1735 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 1736 report_uninit();
c6ee37c5 1737 }
25da4f38
IZ		 1738 if (SvTYPE(sv) < SVt_IV)
1739 /* Typically the caller expects that sv_any is not NULL now. */
1740 sv_upgrade(sv, SVt_IV);
ff68c719 1741 return 0;
1742 }
25da4f38 1743
1d7c1841
GS		 1744 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"UVuf")\n",
1745 PTR2UV(sv),SvUVX(sv)));
25da4f38 1746 return SvIsUV(sv) ? SvUVX(sv) : (UV)SvIVX(sv);
ff68c719 1747}
1748
65202027 1749NV
864dbfa3 1750Perl_sv_2nv(pTHX_ register SV *sv)
79072805
LW		 1751{
1752 if (!sv)
1753 return 0.0;
8990e307 1754 if (SvGMAGICAL(sv)) {
463ee0b2
LW		 1755 mg_get(sv);
1756 if (SvNOKp(sv))
1757 return SvNVX(sv);
a0d0e21e 1758 if (SvPOKp(sv) && SvLEN(sv)) {
599cee73 1759 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !looks_like_number(sv))
a0d0e21e 1760 not_a_number(sv);
097ee67d 1761 return Atof(SvPVX(sv));
a0d0e21e 1762 }
25da4f38 1763 if (SvIOKp(sv)) {
1c846c1f 1764 if (SvIsUV(sv))
65202027 1765 return (NV)SvUVX(sv);
25da4f38 1766 else
65202027 1767 return (NV)SvIVX(sv);
25da4f38 1768 }
16d20bd9 1769 if (!SvROK(sv)) {
d008e5eb 1770 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
d008e5eb 1771 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 1772 report_uninit();
c6ee37c5 1773 }
16d20bd9
AD		 1774 return 0;
1775 }
463ee0b2 1776 }
ed6116ce 1777 if (SvTHINKFIRST(sv)) {
a0d0e21e 1778 if (SvROK(sv)) {
a0d0e21e 1779 SV* tmpstr;
1554e226
DC		 1780 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
1781 (SvRV(tmpstr) != SvRV(sv)))
9e7bc3e8 1782 return SvNV(tmpstr);
56431972 1783 return PTR2NV(SvRV(sv));
a0d0e21e 1784 }
0336b60e 1785 if (SvREADONLY(sv) && !SvOK(sv)) {
599cee73 1786 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 1787 report_uninit();
ed6116ce
LW		 1788 return 0.0;
1789 }
79072805
LW		 1790 }
1791 if (SvTYPE(sv) < SVt_NV) {
463ee0b2
LW		 1792 if (SvTYPE(sv) == SVt_IV)
1793 sv_upgrade(sv, SVt_PVNV);
1794 else
1795 sv_upgrade(sv, SVt_NV);
572bbb43 1796#if defined(USE_LONG_DOUBLE)
097ee67d 1797 DEBUG_c({
f93f4e46 1798 STORE_NUMERIC_LOCAL_SET_STANDARD();
1d7c1841
GS		 1799 PerlIO_printf(Perl_debug_log,
1800 "0x%"UVxf" num(%" PERL_PRIgldbl ")\n",
1801 PTR2UV(sv), SvNVX(sv));
572bbb43
GS		 1802 RESTORE_NUMERIC_LOCAL();
1803 });
65202027 1804#else
572bbb43 1805 DEBUG_c({
f93f4e46 1806 STORE_NUMERIC_LOCAL_SET_STANDARD();
1d7c1841
GS		 1807 PerlIO_printf(Perl_debug_log, "0x%"UVxf" num(%g)\n",
1808 PTR2UV(sv), SvNVX(sv));
097ee67d
JH		 1809 RESTORE_NUMERIC_LOCAL();
1810 });
572bbb43 1811#endif
79072805
LW		 1812 }
1813 else if (SvTYPE(sv) < SVt_PVNV)
1814 sv_upgrade(sv, SVt_PVNV);
748a9306
LW		 1815 if (SvIOKp(sv) &&
1816 (!SvPOKp(sv) || !strchr(SvPVX(sv),'.') || !looks_like_number(sv)))
93a17b20 1817 {
65202027 1818 SvNVX(sv) = SvIsUV(sv) ? (NV)SvUVX(sv) : (NV)SvIVX(sv);
93a17b20 1819 }
748a9306 1820 else if (SvPOKp(sv) && SvLEN(sv)) {
599cee73 1821 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !looks_like_number(sv))
a0d0e21e 1822 not_a_number(sv);
097ee67d 1823 SvNVX(sv) = Atof(SvPVX(sv));
93a17b20 1824 }
79072805 1825 else {
599cee73 1826 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
1d7c1841 1827 report_uninit();
25da4f38
IZ		 1828 if (SvTYPE(sv) < SVt_NV)
1829 /* Typically the caller expects that sv_any is not NULL now. */
1830 sv_upgrade(sv, SVt_NV);
a0d0e21e 1831 return 0.0;
79072805
LW		 1832 }
1833 SvNOK_on(sv);
572bbb43 1834#if defined(USE_LONG_DOUBLE)
097ee67d 1835 DEBUG_c({
f93f4e46 1836 STORE_NUMERIC_LOCAL_SET_STANDARD();
1d7c1841
GS		 1837 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
1838 PTR2UV(sv), SvNVX(sv));
572bbb43
GS		 1839 RESTORE_NUMERIC_LOCAL();
1840 });
65202027 1841#else
572bbb43 1842 DEBUG_c({
f93f4e46 1843 STORE_NUMERIC_LOCAL_SET_STANDARD();
1d7c1841
GS		 1844 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 1nv(%g)\n",
1845 PTR2UV(sv), SvNVX(sv));
097ee67d
JH		 1846 RESTORE_NUMERIC_LOCAL();
1847 });
572bbb43 1848#endif
463ee0b2 1849 return SvNVX(sv);
79072805
LW		 1850}
1851
76e3520e 1852STATIC IV
cea2e8a9 1853S_asIV(pTHX_ SV *sv)
36477c24 1854{
1855 I32 numtype = looks_like_number(sv);
65202027 1856 NV d;
36477c24 1857
25da4f38 1858 if (numtype & IS_NUMBER_TO_INT_BY_ATOL)
cf2093f6 1859 return Atol(SvPVX(sv));
d008e5eb 1860 if (!numtype) {
d008e5eb
GS		 1861 if (ckWARN(WARN_NUMERIC))
1862 not_a_number(sv);
1863 }
097ee67d 1864 d = Atof(SvPVX(sv));
25da4f38 1865 return I_V(d);
36477c24 1866}
1867
76e3520e 1868STATIC UV
cea2e8a9 1869S_asUV(pTHX_ SV *sv)
36477c24 1870{
1871 I32 numtype = looks_like_number(sv);
1872
84902520 1873#ifdef HAS_STRTOUL
25da4f38 1874 if (numtype & IS_NUMBER_TO_INT_BY_ATOL)
cf2093f6 1875 return Strtoul(SvPVX(sv), Null(char**), 10);
84902520 1876#endif
d008e5eb 1877 if (!numtype) {
d008e5eb
GS		 1878 if (ckWARN(WARN_NUMERIC))
1879 not_a_number(sv);
1880 }
097ee67d 1881 return U_V(Atof(SvPVX(sv)));
36477c24 1882}
1883
25da4f38
IZ		 1884/*
1885 * Returns a combination of (advisory only - can get false negatives)
1886 * IS_NUMBER_TO_INT_BY_ATOL, IS_NUMBER_TO_INT_BY_ATOF, IS_NUMBER_NOT_IV,
1887 * IS_NUMBER_NEG
1888 * 0 if does not look like number.
1889 *
1890 * In fact possible values are 0 and
1891 * IS_NUMBER_TO_INT_BY_ATOL 123
1892 * IS_NUMBER_TO_INT_BY_ATOL | IS_NUMBER_NOT_IV 123.1
1893 * IS_NUMBER_TO_INT_BY_ATOF | IS_NUMBER_NOT_IV 123e0
300aed98 1894 * IS_NUMBER_INFINITY
25da4f38
IZ		 1895 * with a possible addition of IS_NUMBER_NEG.
1896 */
1897
954c1994
GS		 1898/*
1899=for apidoc looks_like_number
1900
1901Test if an the content of an SV looks like a number (or is a
1902number).
1903
1904=cut
1905*/
1906
36477c24 1907I32
864dbfa3 1908Perl_looks_like_number(pTHX_ SV *sv)
36477c24 1909{
1910 register char *s;
1911 register char *send;
1912 register char *sbegin;
25da4f38
IZ		 1913 register char *nbegin;
1914 I32 numtype = 0;
300aed98 1915 I32 sawinf = 0;
36477c24 1916 STRLEN len;
1917
1918 if (SvPOK(sv)) {
1c846c1f 1919 sbegin = SvPVX(sv);
36477c24 1920 len = SvCUR(sv);
1921 }
1922 else if (SvPOKp(sv))
1923 sbegin = SvPV(sv, len);
1924 else
1925 return 1;
1926 send = sbegin + len;
1927
1928 s = sbegin;
1929 while (isSPACE(*s))
1930 s++;
25da4f38
IZ		 1931 if (*s == '-') {
1932 s++;
1933 numtype = IS_NUMBER_NEG;
1934 }
1935 else if (*s == '+')
36477c24 1936 s++;
ff0cee69 1937
25da4f38
IZ		 1938 nbegin = s;
1939 /*
097ee67d
JH		 1940 * we return IS_NUMBER_TO_INT_BY_ATOL if the number can be converted
1941 * to _integer_ with atol() and IS_NUMBER_TO_INT_BY_ATOF if you need
1942 * (int)atof().
25da4f38
IZ		 1943 */
1944
300aed98 1945 /* next must be digit or the radix separator or beginning of infinity */
ff0cee69 1946 if (isDIGIT(*s)) {
1947 do {
1948 s++;
1949 } while (isDIGIT(*s));
25da4f38
IZ		 1950
1951 if (s - nbegin >= TYPE_DIGITS(IV)) /* Cannot cache ato[ul]() */
1952 numtype |= IS_NUMBER_TO_INT_BY_ATOF | IS_NUMBER_NOT_IV;
1953 else
1954 numtype |= IS_NUMBER_TO_INT_BY_ATOL;
1955
097ee67d 1956 if (*s == '.'
1c846c1f 1957#ifdef USE_LOCALE_NUMERIC
097ee67d
JH		 1958 || IS_NUMERIC_RADIX(*s)
1959#endif
1960 ) {
ff0cee69 1961 s++;
25da4f38 1962 numtype |= IS_NUMBER_NOT_IV;
097ee67d 1963 while (isDIGIT(*s)) /* optional digits after the radix */
ff0cee69 1964 s++;
1965 }
36477c24 1966 }
097ee67d 1967 else if (*s == '.'
1c846c1f 1968#ifdef USE_LOCALE_NUMERIC
097ee67d
JH		 1969 || IS_NUMERIC_RADIX(*s)
1970#endif
1971 ) {
ff0cee69 1972 s++;
25da4f38 1973 numtype |= IS_NUMBER_TO_INT_BY_ATOL | IS_NUMBER_NOT_IV;
097ee67d 1974 /* no digits before the radix means we need digits after it */
ff0cee69 1975 if (isDIGIT(*s)) {
1976 do {
1977 s++;
1978 } while (isDIGIT(*s));
1979 }
1980 else
1981 return 0;
1982 }
300aed98
JH		 1983 else if (*s == 'I' || *s == 'i') {
1984 s++; if (*s != 'N' && *s != 'n') return 0;
1985 s++; if (*s != 'F' && *s != 'f') return 0;
1986 s++; if (*s == 'I' || *s == 'i') {
1987 s++; if (*s != 'N' && *s != 'n') return 0;
1988 s++; if (*s != 'I' && *s != 'i') return 0;
1989 s++; if (*s != 'T' && *s != 't') return 0;
1990 s++; if (*s != 'Y' && *s != 'y') return 0;
99938567 1991 s++;
300aed98
JH		 1992 }
1993 sawinf = 1;
1994 }
ff0cee69 1995 else
1996 return 0;
1997
300aed98
JH		 1998 if (sawinf)
1999 numtype = IS_NUMBER_INFINITY;
2000 else {
2001 /* we can have an optional exponent part */
2002 if (*s == 'e' || *s == 'E') {
2003 numtype &= ~IS_NUMBER_NEG;
2004 numtype |= IS_NUMBER_TO_INT_BY_ATOF | IS_NUMBER_NOT_IV;
36477c24 2005 s++;
300aed98
JH		 2006 if (*s == '+' || *s == '-')
2007 s++;
2008 if (isDIGIT(*s)) {
2009 do {
2010 s++;
2011 } while (isDIGIT(*s));
2012 }
2013 else
2014 return 0;
2015 }
36477c24 2016 }
2017 while (isSPACE(*s))
2018 s++;
80f3f388 2019 if (s >= send)
36477c24 2020 return numtype;
2021 if (len == 10 && memEQ(sbegin, "0 but true", 10))
25da4f38 2022 return IS_NUMBER_TO_INT_BY_ATOL;
36477c24 2023 return 0;
2024}
2025
79072805 2026char *
864dbfa3 2027Perl_sv_2pv_nolen(pTHX_ register SV *sv)
1fa8b10d
JD		 2028{
2029 STRLEN n_a;
2030 return sv_2pv(sv, &n_a);
2031}
2032
25da4f38 2033/* We assume that buf is at least TYPE_CHARS(UV) long. */
864dbfa3 2034static char *
25da4f38
IZ		 2035uiv_2buf(char *buf, IV iv, UV uv, int is_uv, char **peob)
2036{
25da4f38
IZ		 2037 char *ptr = buf + TYPE_CHARS(UV);
2038 char *ebuf = ptr;
2039 int sign;
25da4f38
IZ		 2040
2041 if (is_uv)
2042 sign = 0;
2043 else if (iv >= 0) {
2044 uv = iv;
2045 sign = 0;
2046 } else {
2047 uv = -iv;
2048 sign = 1;
2049 }
2050 do {
2051 *--ptr = '0' + (uv % 10);
2052 } while (uv /= 10);
2053 if (sign)
2054 *--ptr = '-';
2055 *peob = ebuf;
2056 return ptr;
2057}
2058
1fa8b10d 2059char *
864dbfa3 2060Perl_sv_2pv(pTHX_ register SV *sv, STRLEN *lp)
79072805
LW		 2061{
2062 register char *s;
2063 int olderrno;
46fc3d4c 2064 SV *tsv;
25da4f38
IZ		 2065 char tbuf[64]; /* Must fit sprintf/Gconvert of longest IV/NV */
2066 char *tmpbuf = tbuf;
79072805 2067
463ee0b2
LW		 2068 if (!sv) {
2069 *lp = 0;
2070 return "";
2071 }
8990e307 2072 if (SvGMAGICAL(sv)) {
463ee0b2
LW		 2073 mg_get(sv);
2074 if (SvPOKp(sv)) {
2075 *lp = SvCUR(sv);
2076 return SvPVX(sv);
2077 }
cf2093f6 2078 if (SvIOKp(sv)) {
1c846c1f 2079 if (SvIsUV(sv))
57def98f 2080 (void)sprintf(tmpbuf,"%"UVuf, (UV)SvUVX(sv));
cf2093f6 2081 else
57def98f 2082 (void)sprintf(tmpbuf,"%"IVdf, (IV)SvIVX(sv));
46fc3d4c 2083 tsv = Nullsv;
a0d0e21e 2084 goto tokensave;
463ee0b2
LW		 2085 }
2086 if (SvNOKp(sv)) {
2d4389e4 2087 Gconvert(SvNVX(sv), NV_DIG, 0, tmpbuf);
46fc3d4c 2088 tsv = Nullsv;
a0d0e21e 2089 goto tokensave;
463ee0b2 2090 }
16d20bd9 2091 if (!SvROK(sv)) {
d008e5eb 2092 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
d008e5eb 2093 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 2094 report_uninit();
c6ee37c5 2095 }
16d20bd9
AD		 2096 *lp = 0;
2097 return "";
2098 }
463ee0b2 2099 }
ed6116ce
LW		 2100 if (SvTHINKFIRST(sv)) {
2101 if (SvROK(sv)) {
a0d0e21e 2102 SV* tmpstr;
1554e226
DC		 2103 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,string)) &&
2104 (SvRV(tmpstr) != SvRV(sv)))
9e7bc3e8 2105 return SvPV(tmpstr,*lp);
ed6116ce
LW		 2106 sv = (SV*)SvRV(sv);
2107 if (!sv)
2108 s = "NULLREF";
2109 else {
f9277f47
IZ		 2110 MAGIC *mg;
2111
ed6116ce 2112 switch (SvTYPE(sv)) {
f9277f47
IZ		 2113 case SVt_PVMG:
2114 if ( ((SvFLAGS(sv) &
1c846c1f 2115 (SVs_OBJECT|SVf_OK|SVs_GMG|SVs_SMG|SVs_RMG))
3149a8e4 2116 == (SVs_OBJECT|SVs_RMG))
57668c4d 2117 && strEQ(s=HvNAME(SvSTASH(sv)), "Regexp")
f9277f47 2118 && (mg = mg_find(sv, 'r'))) {
2cd61cdb 2119 regexp *re = (regexp *)mg->mg_obj;
1bd3ad17 2120
2cd61cdb 2121 if (!mg->mg_ptr) {
8782bef2
GB		 2122 char *fptr = "msix";
2123 char reflags[6];
2124 char ch;
2125 int left = 0;
2126 int right = 4;
2127 U16 reganch = (re->reganch & PMf_COMPILETIME) >> 12;
2128
155aba94 2129 while((ch = *fptr++)) {
8782bef2
GB		 2130 if(reganch & 1) {
2131 reflags[left++] = ch;
2132 }
2133 else {
2134 reflags[right--] = ch;
2135 }
2136 reganch >>= 1;
2137 }
2138 if(left != 4) {
2139 reflags[left] = '-';
2140 left = 5;
2141 }
2142
2143 mg->mg_len = re->prelen + 4 + left;
2144 New(616, mg->mg_ptr, mg->mg_len + 1 + left, char);
2145 Copy("(?", mg->mg_ptr, 2, char);
2146 Copy(reflags, mg->mg_ptr+2, left, char);
2147 Copy(":", mg->mg_ptr+left+2, 1, char);
2148 Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char);
1bd3ad17
IZ		 2149 mg->mg_ptr[mg->mg_len - 1] = ')';
2150 mg->mg_ptr[mg->mg_len] = 0;
2151 }
3280af22 2152 PL_reginterp_cnt += re->program[0].next_off;
1bd3ad17
IZ		 2153 *lp = mg->mg_len;
2154 return mg->mg_ptr;
f9277f47
IZ		 2155 }
2156 /* Fall through */
ed6116ce
LW		 2157 case SVt_NULL:
2158 case SVt_IV:
2159 case SVt_NV:
2160 case SVt_RV:
2161 case SVt_PV:
2162 case SVt_PVIV:
2163 case SVt_PVNV:
81689caa
HS		 2164 case SVt_PVBM: if (SvROK(sv))
2165 s = "REF";
2166 else
2167 s = "SCALAR"; break;
ed6116ce
LW		 2168 case SVt_PVLV: s = "LVALUE"; break;
2169 case SVt_PVAV: s = "ARRAY"; break;
2170 case SVt_PVHV: s = "HASH"; break;
2171 case SVt_PVCV: s = "CODE"; break;
2172 case SVt_PVGV: s = "GLOB"; break;
1d2dff63 2173 case SVt_PVFM: s = "FORMAT"; break;
36477c24 2174 case SVt_PVIO: s = "IO"; break;
ed6116ce
LW		 2175 default: s = "UNKNOWN"; break;
2176 }
46fc3d4c 2177 tsv = NEWSV(0,0);
ed6116ce 2178 if (SvOBJECT(sv))
cea2e8a9 2179 Perl_sv_setpvf(aTHX_ tsv, "%s=%s", HvNAME(SvSTASH(sv)), s);
ed6116ce 2180 else
46fc3d4c 2181 sv_setpv(tsv, s);
57def98f 2182 Perl_sv_catpvf(aTHX_ tsv, "(0x%"UVxf")", PTR2UV(sv));
a0d0e21e 2183 goto tokensaveref;
463ee0b2 2184 }
ed6116ce
LW		 2185 *lp = strlen(s);
2186 return s;
79072805 2187 }
0336b60e 2188 if (SvREADONLY(sv) && !SvOK(sv)) {
0336b60e 2189 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 2190 report_uninit();
ed6116ce
LW		 2191 *lp = 0;
2192 return "";
79072805 2193 }
79072805 2194 }
7d59b7e4
NIS		 2195 if (SvPOK(sv)) {
2196 *lp = SvCUR(sv);
2197 return SvPVX(sv);
2198 }
2199 else if (SvNOKp(sv)) { /* See note in sv_2uv() */
25da4f38 2200 /* XXXX 64-bit? IV may have better precision... */
8aad8eb3 2201 /* I tried changing this to be 64-bit-aware and
34d861e4
JH		 2202 * the t/op/numconvert.t became very, very, angry.
2203 * --jhi Sep 1999 */
79072805
LW		 2204 if (SvTYPE(sv) < SVt_PVNV)
2205 sv_upgrade(sv, SVt_PVNV);
1c846c1f 2206 /* The +20 is pure guesswork. Configure test needed. --jhi */
59155cc0 2207 SvGROW(sv, NV_DIG + 20);
463ee0b2 2208 s = SvPVX(sv);
79072805 2209 olderrno = errno; /* some Xenix systems wipe out errno here */
79072805 2210#ifdef apollo
463ee0b2 2211 if (SvNVX(sv) == 0.0)
79072805
LW		 2212 (void)strcpy(s,"0");
2213 else
2214#endif /*apollo*/
bbce6d69 2215 {
2d4389e4 2216 Gconvert(SvNVX(sv), NV_DIG, 0, s);
bbce6d69 2217 }
79072805 2218 errno = olderrno;
a0d0e21e
LW		 2219#ifdef FIXNEGATIVEZERO
2220 if (*s == '-' && s[1] == '0' && !s[2])
2221 strcpy(s,"0");
2222#endif
79072805
LW		 2223 while (*s) s++;
2224#ifdef hcx
2225 if (s[-1] == '.')
46fc3d4c 2226 *--s = '\0';
79072805
LW		 2227#endif
2228 }
748a9306 2229 else if (SvIOKp(sv)) {
25da4f38 2230 U32 isIOK = SvIOK(sv);
0336b60e 2231 U32 isUIOK = SvIsUV(sv);
25da4f38
IZ		 2232 char buf[TYPE_CHARS(UV)];
2233 char *ebuf, *ptr;
2234
79072805
LW		 2235 if (SvTYPE(sv) < SVt_PVIV)
2236 sv_upgrade(sv, SVt_PVIV);
0336b60e 2237 if (isUIOK)
25da4f38 2238 ptr = uiv_2buf(buf, 0, SvUVX(sv), 1, &ebuf);
0336b60e 2239 else
25da4f38 2240 ptr = uiv_2buf(buf, SvIVX(sv), 0, 0, &ebuf);
0336b60e
IZ		 2241 SvGROW(sv, ebuf - ptr + 1); /* inlined from sv_setpvn */
2242 Move(ptr,SvPVX(sv),ebuf - ptr,char);
2243 SvCUR_set(sv, ebuf - ptr);
46fc3d4c 2244 s = SvEND(sv);
0336b60e 2245 *s = '\0';
25da4f38 2246 if (isIOK)
64f14228
GA		 2247 SvIOK_on(sv);
2248 else
2249 SvIOKp_on(sv);
0336b60e
IZ		 2250 if (isUIOK)
2251 SvIsUV_on(sv);
2252 SvPOK_on(sv);
79072805
LW		 2253 }
2254 else {
0336b60e
IZ		 2255 if (ckWARN(WARN_UNINITIALIZED)
2256 && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
1d7c1841 2257 report_uninit();
a0d0e21e 2258 *lp = 0;
25da4f38
IZ		 2259 if (SvTYPE(sv) < SVt_PV)
2260 /* Typically the caller expects that sv_any is not NULL now. */
2261 sv_upgrade(sv, SVt_PV);
a0d0e21e 2262 return "";
79072805 2263 }
463ee0b2
LW		 2264 *lp = s - SvPVX(sv);
2265 SvCUR_set(sv, *lp);
79072805 2266 SvPOK_on(sv);
1d7c1841
GS		 2267 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
2268 PTR2UV(sv),SvPVX(sv)));
463ee0b2 2269 return SvPVX(sv);
a0d0e21e
LW		 2270
2271 tokensave:
2272 if (SvROK(sv)) { /* XXX Skip this when sv_pvn_force calls */
2273 /* Sneaky stuff here */
2274
2275 tokensaveref:
46fc3d4c 2276 if (!tsv)
96827780 2277 tsv = newSVpv(tmpbuf, 0);
46fc3d4c 2278 sv_2mortal(tsv);
2279 *lp = SvCUR(tsv);
2280 return SvPVX(tsv);
a0d0e21e
LW		 2281 }
2282 else {
2283 STRLEN len;
46fc3d4c 2284 char *t;
2285
2286 if (tsv) {
2287 sv_2mortal(tsv);
2288 t = SvPVX(tsv);
2289 len = SvCUR(tsv);
2290 }
2291 else {
96827780
MB		 2292 t = tmpbuf;
2293 len = strlen(tmpbuf);
46fc3d4c 2294 }
a0d0e21e 2295#ifdef FIXNEGATIVEZERO
46fc3d4c 2296 if (len == 2 && t[0] == '-' && t[1] == '0') {
2297 t = "0";
2298 len = 1;
2299 }
a0d0e21e
LW		 2300#endif
2301 (void)SvUPGRADE(sv, SVt_PV);
46fc3d4c 2302 *lp = len;
a0d0e21e
LW		 2303 s = SvGROW(sv, len + 1);
2304 SvCUR_set(sv, len);
46fc3d4c 2305 (void)strcpy(s, t);
6bf554b4 2306 SvPOKp_on(sv);
a0d0e21e
LW		 2307 return s;
2308 }
463ee0b2
LW		 2309}
2310
7340a771
GS		 2311char *
2312Perl_sv_2pvbyte_nolen(pTHX_ register SV *sv)
2313{
560a288e
GS		 2314 STRLEN n_a;
2315 return sv_2pvbyte(sv, &n_a);
7340a771
GS		 2316}
2317
2318char *
2319Perl_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp)
2320{
2321 return sv_2pv(sv,lp);
2322}
2323
2324char *
2325Perl_sv_2pvutf8_nolen(pTHX_ register SV *sv)
2326{
560a288e
GS		 2327 STRLEN n_a;
2328 return sv_2pvutf8(sv, &n_a);
7340a771
GS		 2329}
2330
2331char *
2332Perl_sv_2pvutf8(pTHX_ register SV *sv, STRLEN *lp)
2333{
560a288e 2334 sv_utf8_upgrade(sv);
7d59b7e4 2335 return SvPV(sv,*lp);
7340a771 2336}
1c846c1f 2337
463ee0b2
LW		 2338/* This function is only called on magical items */
2339bool
864dbfa3 2340Perl_sv_2bool(pTHX_ register SV *sv)
463ee0b2 2341{
8990e307 2342 if (SvGMAGICAL(sv))
463ee0b2
LW		 2343 mg_get(sv);
2344
a0d0e21e
LW		 2345 if (!SvOK(sv))
2346 return 0;
2347 if (SvROK(sv)) {
a0d0e21e 2348 SV* tmpsv;
1554e226
DC		 2349 if (SvAMAGIC(sv) && (tmpsv=AMG_CALLun(sv,bool_)) &&
2350 (SvRV(tmpsv) != SvRV(sv)))
9e7bc3e8 2351 return SvTRUE(tmpsv);
a0d0e21e
LW		 2352 return SvRV(sv) != 0;
2353 }
463ee0b2 2354 if (SvPOKp(sv)) {
11343788
MB		 2355 register XPV* Xpvtmp;
2356 if ((Xpvtmp = (XPV*)SvANY(sv)) &&
2357 (*Xpvtmp->xpv_pv > '0' ||
2358 Xpvtmp->xpv_cur > 1 ||
2359 (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0')))
463ee0b2
LW		 2360 return 1;
2361 else
2362 return 0;
2363 }
2364 else {
2365 if (SvIOKp(sv))
2366 return SvIVX(sv) != 0;
2367 else {
2368 if (SvNOKp(sv))
2369 return SvNVX(sv) != 0.0;
2370 else
2371 return FALSE;
2372 }
2373 }
79072805
LW		 2374}
2375
c461cf8f
JH		 2376/*
2377=for apidoc sv_utf8_upgrade
2378
2379Convert the PV of an SV to its UTF8-encoded form.
2380
2381=cut
2382*/
2383
560a288e
GS		 2384void
2385Perl_sv_utf8_upgrade(pTHX_ register SV *sv)
2386{
40826f67
JH		 2387 char *s, *t;
2388 bool hibit;
560a288e
GS		 2389
2390 if (!sv || !SvPOK(sv) || SvUTF8(sv))
2391 return;
2392
40826f67
JH		 2393 /* This function could be much more efficient if we had a FLAG in SVs
2394 * to signal if there are any hibit chars in the PV.
560a288e 2395 */
40826f67
JH		 2396 for (s = t = SvPVX(sv), hibit = FALSE; t < SvEND(sv) && !hibit; t++)
2397 if (*t & 0x80)
2398 hibit = TRUE;
560a288e 2399
40826f67 2400 if (hibit) {
67e989fb 2401 STRLEN len = SvCUR(sv) + 1; /* Plus the \0 */
00df9076 2402 SvPVX(sv) = (char*)bytes_to_utf8((U8*)s, &len);
841d7a39
JH		 2403 SvCUR(sv) = len - 1;
2404 SvLEN(sv) = len; /* No longer know the real size. */
560a288e 2405 SvUTF8_on(sv);
d2f449dd 2406 Safefree(s); /* No longer using what was there before. */
560a288e
GS		 2407 }
2408}
2409
c461cf8f
JH		 2410/*
2411=for apidoc sv_utf8_downgrade
2412
2413Attempt to convert the PV of an SV from UTF8-encoded to byte encoding.
2414This may not be possible if the PV contains non-byte encoding characters;
2415if this is the case, either returns false or, if C<fail_ok> is not
2416true, croaks.
2417
2418=cut
2419*/
2420
560a288e
GS		 2421bool
2422Perl_sv_utf8_downgrade(pTHX_ register SV* sv, bool fail_ok)
2423{
2424 if (SvPOK(sv) && SvUTF8(sv)) {
fa301091
JH		 2425 if (SvCUR(sv)) {
2426 char *c = SvPVX(sv);
2427 STRLEN len = SvCUR(sv);
2428
2429 if (!utf8_to_bytes((U8*)c, &len)) {
2430 if (fail_ok)
2431 return FALSE;
2432 else {
2433 if (PL_op)
2434 Perl_croak(aTHX_ "Wide character in %s",
2435 PL_op_desc[PL_op->op_type]);
2436 else
2437 Perl_croak(aTHX_ "Wide character");
2438 }
4b3603a4 2439 }
fa301091 2440 SvCUR(sv) = len;
67e989fb 2441 }
9f9ab905 2442 SvUTF8_off(sv);
560a288e 2443 }
fa301091 2444
560a288e
GS		 2445 return TRUE;
2446}
2447
c461cf8f
JH		 2448/*
2449=for apidoc sv_utf8_encode
2450
2451Convert the PV of an SV to UTF8-encoded, but then turn off the C<SvUTF8>
1c846c1f 2452flag so that it looks like bytes again. Nothing calls this.
c461cf8f
JH		 2453
2454=cut
2455*/
2456
560a288e
GS		 2457void
2458Perl_sv_utf8_encode(pTHX_ register SV *sv)
2459{
2460 sv_utf8_upgrade(sv);
2461 SvUTF8_off(sv);
2462}
2463
2464bool
2465Perl_sv_utf8_decode(pTHX_ register SV *sv)
2466{
2467 if (SvPOK(sv)) {
2468 char *c;
2469 bool has_utf = FALSE;
2470 if (!sv_utf8_downgrade(sv, TRUE))
2471 return FALSE;
2472
2473 /* it is actually just a matter of turning the utf8 flag on, but
2474 * we want to make sure everything inside is valid utf8 first.
2475 */
2476 c = SvPVX(sv);
00df9076 2477 if (!is_utf8_string((U8*)c, SvCUR(sv)+1))
67e989fb
JH		 2478 return FALSE;
2479
560a288e 2480 while (c < SvEND(sv)) {
67e989fb
JH		 2481 if (*c++ & 0x80) {
2482 SvUTF8_on(sv);
2483 break;
2484 }
560a288e 2485 }
560a288e
GS		 2486 }
2487 return TRUE;
2488}
2489
2490
79072805 2491/* Note: sv_setsv() should not be called with a source string that needs
463ee0b2 2492 * to be reused, since it may destroy the source string if it is marked
79072805
LW		 2493 * as temporary.
2494 */
2495
954c1994
GS		 2496/*
2497=for apidoc sv_setsv
2498
2499Copies the contents of the source SV C<ssv> into the destination SV C<dsv>.
2500The source SV may be destroyed if it is mortal. Does not handle 'set'
2501magic. See the macro forms C<SvSetSV>, C<SvSetSV_nosteal> and
2502C<sv_setsv_mg>.
2503
2504=cut
2505*/
2506
79072805 2507void
864dbfa3 2508Perl_sv_setsv(pTHX_ SV *dstr, register SV *sstr)
79072805 2509{
8990e307
LW		 2510 register U32 sflags;
2511 register int dtype;
2512 register int stype;
463ee0b2 2513
79072805
LW		 2514 if (sstr == dstr)
2515 return;
2213622d 2516 SV_CHECK_THINKFIRST(dstr);
79072805 2517 if (!sstr)
3280af22 2518 sstr = &PL_sv_undef;
8990e307
LW		 2519 stype = SvTYPE(sstr);
2520 dtype = SvTYPE(dstr);
79072805 2521
a0d0e21e 2522 SvAMAGIC_off(dstr);
9e7bc3e8 2523
463ee0b2 2524 /* There's a lot of redundancy below but we're going for speed here */
79072805 2525
8990e307 2526 switch (stype) {
79072805 2527 case SVt_NULL:
aece5585 2528 undef_sstr:
20408e3c
GS		 2529 if (dtype != SVt_PVGV) {
2530 (void)SvOK_off(dstr);
2531 return;
2532 }
2533 break;
463ee0b2 2534 case SVt_IV:
aece5585
GA		 2535 if (SvIOK(sstr)) {
2536 switch (dtype) {
2537 case SVt_NULL:
8990e307 2538 sv_upgrade(dstr, SVt_IV);
aece5585
GA		 2539 break;
2540 case SVt_NV:
8990e307 2541 sv_upgrade(dstr, SVt_PVNV);
aece5585
GA		 2542 break;
2543 case SVt_RV:
2544 case SVt_PV:
a0d0e21e 2545 sv_upgrade(dstr, SVt_PVIV);
aece5585
GA		 2546 break;
2547 }
2548 (void)SvIOK_only(dstr);
2549 SvIVX(dstr) = SvIVX(sstr);
25da4f38
IZ		 2550 if (SvIsUV(sstr))
2551 SvIsUV_on(dstr);
27c9684d
AP		 2552 if (SvTAINTED(sstr))
2553 SvTAINT(dstr);
aece5585 2554 return;
8990e307 2555 }
aece5585
GA		 2556 goto undef_sstr;
2557
463ee0b2 2558 case SVt_NV:
aece5585
GA		 2559 if (SvNOK(sstr)) {
2560 switch (dtype) {
2561 case SVt_NULL:
2562 case SVt_IV:
8990e307 2563 sv_upgrade(dstr, SVt_NV);
aece5585
GA		 2564 break;
2565 case SVt_RV:
2566 case SVt_PV:
2567 case SVt_PVIV:
a0d0e21e 2568 sv_upgrade(dstr, SVt_PVNV);
aece5585
GA		 2569 break;
2570 }
2571 SvNVX(dstr) = SvNVX(sstr);
2572 (void)SvNOK_only(dstr);
27c9684d
AP		 2573 if (SvTAINTED(sstr))
2574 SvTAINT(dstr);
aece5585 2575 return;
8990e307 2576 }
aece5585
GA		 2577 goto undef_sstr;
2578
ed6116ce 2579 case SVt_RV:
8990e307 2580 if (dtype < SVt_RV)
ed6116ce 2581 sv_upgrade(dstr, SVt_RV);
c07a80fd 2582 else if (dtype == SVt_PVGV &&
2583 SvTYPE(SvRV(sstr)) == SVt_PVGV) {
2584 sstr = SvRV(sstr);
a5f75d66 2585 if (sstr == dstr) {
1d7c1841
GS		 2586 if (GvIMPORTED(dstr) != GVf_IMPORTED
2587 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2588 {
a5f75d66 2589 GvIMPORTED_on(dstr);
1d7c1841 2590 }
a5f75d66
AD		 2591 GvMULTI_on(dstr);
2592 return;
2593 }
c07a80fd 2594 goto glob_assign;
2595 }
ed6116ce 2596 break;
463ee0b2 2597 case SVt_PV:
fc36a67e 2598 case SVt_PVFM:
8990e307 2599 if (dtype < SVt_PV)
463ee0b2 2600 sv_upgrade(dstr, SVt_PV);
463ee0b2
LW		 2601 break;
2602 case SVt_PVIV:
8990e307 2603 if (dtype < SVt_PVIV)
463ee0b2 2604 sv_upgrade(dstr, SVt_PVIV);
463ee0b2
LW		 2605 break;
2606 case SVt_PVNV:
8990e307 2607 if (dtype < SVt_PVNV)
463ee0b2 2608 sv_upgrade(dstr, SVt_PVNV);
463ee0b2 2609 break;
4633a7c4
LW		 2610 case SVt_PVAV:
2611 case SVt_PVHV:
2612 case SVt_PVCV:
4633a7c4 2613 case SVt_PVIO:
533c011a 2614 if (PL_op)
cea2e8a9 2615 Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0),
22c35a8c 2616 PL_op_name[PL_op->op_type]);
4633a7c4 2617 else
cea2e8a9 2618 Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0));
4633a7c4
LW		 2619 break;
2620
79072805 2621 case SVt_PVGV:
8990e307 2622 if (dtype <= SVt_PVGV) {
c07a80fd 2623 glob_assign:
a5f75d66 2624 if (dtype != SVt_PVGV) {
a0d0e21e
LW		 2625 char *name = GvNAME(sstr);
2626 STRLEN len = GvNAMELEN(sstr);
463ee0b2 2627 sv_upgrade(dstr, SVt_PVGV);
6662521e 2628 sv_magic(dstr, dstr, '*', Nullch, 0);
85aff577 2629 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
a0d0e21e
LW		 2630 GvNAME(dstr) = savepvn(name, len);
2631 GvNAMELEN(dstr) = len;
2632 SvFAKE_on(dstr); /* can coerce to non-glob */
2633 }
7bac28a0 2634 /* ahem, death to those who redefine active sort subs */
3280af22
NIS		 2635 else if (PL_curstackinfo->si_type == PERLSI_SORT
2636 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
cea2e8a9 2637 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
7bac28a0 2638 GvNAME(dstr));
a0d0e21e 2639 (void)SvOK_off(dstr);
a5f75d66 2640 GvINTRO_off(dstr); /* one-shot flag */
1edc1566 2641 gp_free((GV*)dstr);
79072805 2642 GvGP(dstr) = gp_ref(GvGP(sstr));
27c9684d
AP		 2643 if (SvTAINTED(sstr))
2644 SvTAINT(dstr);
1d7c1841
GS		 2645 if (GvIMPORTED(dstr) != GVf_IMPORTED
2646 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2647 {
a5f75d66 2648 GvIMPORTED_on(dstr);
1d7c1841 2649 }
a5f75d66 2650 GvMULTI_on(dstr);
79072805
LW		 2651 return;
2652 }
2653 /* FALL THROUGH */
2654
2655 default:
973f89ab
CS		 2656 if (SvGMAGICAL(sstr)) {
2657 mg_get(sstr);
2658 if (SvTYPE(sstr) != stype) {
2659 stype = SvTYPE(sstr);
2660 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
2661 goto glob_assign;
2662 }
2663 }
ded42b9f 2664 if (stype == SVt_PVLV)
6fc92669 2665 (void)SvUPGRADE(dstr, SVt_PVNV);
ded42b9f 2666 else
6fc92669 2667 (void)SvUPGRADE(dstr, stype);
79072805
LW		 2668 }
2669
8990e307
LW		 2670 sflags = SvFLAGS(sstr);
2671
2672 if (sflags & SVf_ROK) {
2673 if (dtype >= SVt_PV) {
2674 if (dtype == SVt_PVGV) {
2675 SV *sref = SvREFCNT_inc(SvRV(sstr));
2676 SV *dref = 0;
a5f75d66 2677 int intro = GvINTRO(dstr);
a0d0e21e
LW		 2678
2679 if (intro) {
2680 GP *gp;
1d7c1841 2681 gp_free((GV*)dstr);
a5f75d66 2682 GvINTRO_off(dstr); /* one-shot flag */
a0d0e21e 2683 Newz(602,gp, 1, GP);
44a8e56a 2684 GvGP(dstr) = gp_ref(gp);
a0d0e21e 2685 GvSV(dstr) = NEWSV(72,0);
1d7c1841 2686 GvLINE(dstr) = CopLINE(PL_curcop);
1edc1566 2687 GvEGV(dstr) = (GV*)dstr;
a0d0e21e 2688 }
a5f75d66 2689 GvMULTI_on(dstr);
8990e307
LW		 2690 switch (SvTYPE(sref)) {
2691 case SVt_PVAV:
a0d0e21e
LW		 2692 if (intro)
2693 SAVESPTR(GvAV(dstr));
2694 else
2695 dref = (SV*)GvAV(dstr);
8990e307 2696 GvAV(dstr) = (AV*)sref;
39bac7f7 2697 if (!GvIMPORTED_AV(dstr)
1d7c1841
GS		 2698 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2699 {
a5f75d66 2700 GvIMPORTED_AV_on(dstr);
1d7c1841 2701 }
8990e307
LW		 2702 break;
2703 case SVt_PVHV:
a0d0e21e
LW		 2704 if (intro)
2705 SAVESPTR(GvHV(dstr));
2706 else
2707 dref = (SV*)GvHV(dstr);
8990e307 2708 GvHV(dstr) = (HV*)sref;
39bac7f7 2709 if (!GvIMPORTED_HV(dstr)
1d7c1841
GS		 2710 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2711 {
a5f75d66 2712 GvIMPORTED_HV_on(dstr);
1d7c1841 2713 }
8990e307
LW		 2714 break;
2715 case SVt_PVCV:
8ebc5c01 2716 if (intro) {
2717 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
2718 SvREFCNT_dec(GvCV(dstr));
2719 GvCV(dstr) = Nullcv;
68dc0745 2720 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3280af22 2721 PL_sub_generation++;
8ebc5c01 2722 }
a0d0e21e 2723 SAVESPTR(GvCV(dstr));
8ebc5c01 2724 }
68dc0745 2725 else
2726 dref = (SV*)GvCV(dstr);
2727 if (GvCV(dstr) != (CV*)sref) {
748a9306 2728 CV* cv = GvCV(dstr);
4633a7c4 2729 if (cv) {
68dc0745 2730 if (!GvCVGEN((GV*)dstr) &&
2731 (CvROOT(cv) || CvXSUB(cv)))
2732 {
beab0874 2733 SV *const_sv;
7bac28a0 2734 /* ahem, death to those who redefine
2735 * active sort subs */
3280af22
NIS		 2736 if (PL_curstackinfo->si_type == PERLSI_SORT &&
2737 PL_sortcop == CvSTART(cv))
1c846c1f 2738 Perl_croak(aTHX_
7bac28a0 2739 "Can't redefine active sort subroutine %s",
2740 GvENAME((GV*)dstr));
beab0874
JT		 2741 /* Redefining a sub - warning is mandatory if
2742 it was a const and its value changed. */
2743 if (ckWARN(WARN_REDEFINE)
2744 || (CvCONST(cv)
2745 && (!CvCONST((CV*)sref)
2746 || sv_cmp(cv_const_sv(cv),
2747 cv_const_sv((CV*)sref)))))
2748 {
2749 Perl_warner(aTHX_ WARN_REDEFINE,
2750 CvCONST(cv)
2751 ? "Constant subroutine %s redefined"
47deb5e7 2752 : "Subroutine %s redefined",
beab0874
JT		 2753 GvENAME((GV*)dstr));
2754 }
9607fc9c 2755 }
3fe9a6f1 2756 cv_ckproto(cv, (GV*)dstr,
2757 SvPOK(sref) ? SvPVX(sref) : Nullch);
4633a7c4 2758 }
a5f75d66 2759 GvCV(dstr) = (CV*)sref;
7a4c00b4 2760 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
a5f75d66 2761 GvASSUMECV_on(dstr);
3280af22 2762 PL_sub_generation++;
a5f75d66 2763 }
39bac7f7 2764 if (!GvIMPORTED_CV(dstr)
1d7c1841
GS		 2765 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2766 {
a5f75d66 2767 GvIMPORTED_CV_on(dstr);
1d7c1841 2768 }
8990e307 2769 break;
91bba347
LW		 2770 case SVt_PVIO:
2771 if (intro)
2772 SAVESPTR(GvIOp(dstr));
2773 else
2774 dref = (SV*)GvIOp(dstr);
2775 GvIOp(dstr) = (IO*)sref;
2776 break;
f4d13ee9
JH		 2777 case SVt_PVFM:
2778 if (intro)
2779 SAVESPTR(GvFORM(dstr));
2780 else
2781 dref = (SV*)GvFORM(dstr);
2782 GvFORM(dstr) = (CV*)sref;
2783 break;
8990e307 2784 default:
a0d0e21e
LW		 2785 if (intro)
2786 SAVESPTR(GvSV(dstr));
2787 else
2788 dref = (SV*)GvSV(dstr);
8990e307 2789 GvSV(dstr) = sref;
39bac7f7 2790 if (!GvIMPORTED_SV(dstr)
1d7c1841
GS		 2791 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2792 {
a5f75d66 2793 GvIMPORTED_SV_on(dstr);
1d7c1841 2794 }
8990e307
LW		 2795 break;
2796 }
2797 if (dref)
2798 SvREFCNT_dec(dref);
a0d0e21e
LW		 2799 if (intro)
2800 SAVEFREESV(sref);
27c9684d
AP		 2801 if (SvTAINTED(sstr))
2802 SvTAINT(dstr);
8990e307
LW		 2803 return;
2804 }
a0d0e21e 2805 if (SvPVX(dstr)) {
760ac839 2806 (void)SvOOK_off(dstr); /* backoff */
50483b2c
JD		 2807 if (SvLEN(dstr))
2808 Safefree(SvPVX(dstr));
a0d0e21e
LW		 2809 SvLEN(dstr)=SvCUR(dstr)=0;
2810 }
8990e307 2811 }
a0d0e21e 2812 (void)SvOK_off(dstr);
8990e307 2813 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
ed6116ce 2814 SvROK_on(dstr);
8990e307 2815 if (sflags & SVp_NOK) {
ed6116ce
LW		 2816 SvNOK_on(dstr);
2817 SvNVX(dstr) = SvNVX(sstr);
2818 }
8990e307 2819 if (sflags & SVp_IOK) {
a0d0e21e 2820 (void)SvIOK_on(dstr);
ed6116ce 2821 SvIVX(dstr) = SvIVX(sstr);
2b1c7e3e 2822 if (sflags & SVf_IVisUV)
25da4f38 2823 SvIsUV_on(dstr);
ed6116ce 2824 }
a0d0e21e
LW		 2825 if (SvAMAGIC(sstr)) {
2826 SvAMAGIC_on(dstr);
2827 }
ed6116ce 2828 }
8990e307 2829 else if (sflags & SVp_POK) {
79072805
LW		 2830
2831 /*
2832 * Check to see if we can just swipe the string. If so, it's a
2833 * possible small lose on short strings, but a big win on long ones.
463ee0b2
LW		 2834 * It might even be a win on short strings if SvPVX(dstr)
2835 * has to be allocated and SvPVX(sstr) has to be freed.
79072805
LW		 2836 */
2837
ff68c719 2838 if (SvTEMP(sstr) && /* slated for free anyway? */
01b73108 2839 SvREFCNT(sstr) == 1 && /* and no other references to it? */
1c846c1f 2840 !(sflags & SVf_OOK) && /* and not involved in OOK hack? */
4c8f17b9
BH		 2841 SvLEN(sstr) && /* and really is a string */
2842 !(PL_op && PL_op->op_type == OP_AASSIGN)) /* and won't be needed again, potentially */
a5f75d66 2843 {
adbc6bb1 2844 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
a5f75d66
AD		 2845 if (SvOOK(dstr)) {
2846 SvFLAGS(dstr) &= ~SVf_OOK;
2847 Safefree(SvPVX(dstr) - SvIVX(dstr));
2848 }
50483b2c 2849 else if (SvLEN(dstr))
a5f75d66 2850 Safefree(SvPVX(dstr));
79072805 2851 }
a5f75d66 2852 (void)SvPOK_only(dstr);
463ee0b2 2853 SvPV_set(dstr, SvPVX(sstr));
79072805
LW		 2854 SvLEN_set(dstr, SvLEN(sstr));
2855 SvCUR_set(dstr, SvCUR(sstr));
f4e86e0f 2856
79072805 2857 SvTEMP_off(dstr);
2b1c7e3e 2858 (void)SvOK_off(sstr); /* NOTE: nukes most SvFLAGS on sstr */
79072805
LW		 2859 SvPV_set(sstr, Nullch);
2860 SvLEN_set(sstr, 0);
a5f75d66
AD		 2861 SvCUR_set(sstr, 0);
2862 SvTEMP_off(sstr);
79072805
LW		 2863 }
2864 else { /* have to copy actual string */
8990e307
LW		 2865 STRLEN len = SvCUR(sstr);
2866
2867 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
2868 Move(SvPVX(sstr),SvPVX(dstr),len,char);
2869 SvCUR_set(dstr, len);
2870 *SvEND(dstr) = '\0';
a0d0e21e 2871 (void)SvPOK_only(dstr);
79072805 2872 }
3aa33fe5 2873 if ((sflags & SVf_UTF8) && !IN_BYTE)
a7cb1f99 2874 SvUTF8_on(dstr);
79072805 2875 /*SUPPRESS 560*/
8990e307 2876 if (sflags & SVp_NOK) {
79072805 2877 SvNOK_on(dstr);
463ee0b2 2878 SvNVX(dstr) = SvNVX(sstr);
79072805 2879 }
8990e307 2880 if (sflags & SVp_IOK) {
a0d0e21e 2881 (void)SvIOK_on(dstr);
463ee0b2 2882 SvIVX(dstr) = SvIVX(sstr);
2b1c7e3e 2883 if (sflags & SVf_IVisUV)
25da4f38 2884 SvIsUV_on(dstr);
79072805
LW		 2885 }
2886 }
8990e307 2887 else if (sflags & SVp_NOK) {
463ee0b2 2888 SvNVX(dstr) = SvNVX(sstr);
a0d0e21e 2889 (void)SvNOK_only(dstr);
2b1c7e3e 2890 if (sflags & SVf_IOK) {
a0d0e21e 2891 (void)SvIOK_on(dstr);
463ee0b2 2892 SvIVX(dstr) = SvIVX(sstr);
25da4f38 2893 /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */
2b1c7e3e 2894 if (sflags & SVf_IVisUV)
25da4f38 2895 SvIsUV_on(dstr);
79072805
LW		 2896 }
2897 }
8990e307 2898 else if (sflags & SVp_IOK) {
a0d0e21e 2899 (void)SvIOK_only(dstr);
463ee0b2 2900 SvIVX(dstr) = SvIVX(sstr);
2b1c7e3e 2901 if (sflags & SVf_IVisUV)
25da4f38 2902 SvIsUV_on(dstr);
79072805
LW		 2903 }
2904 else {
20408e3c 2905 if (dtype == SVt_PVGV) {
e476b1b5
GS		 2906 if (ckWARN(WARN_MISC))
2907 Perl_warner(aTHX_ WARN_MISC, "Undefined value assigned to typeglob");
20408e3c
GS		 2908 }
2909 else
2910 (void)SvOK_off(dstr);
a0d0e21e 2911 }
27c9684d
AP		 2912 if (SvTAINTED(sstr))
2913 SvTAINT(dstr);
79072805
LW		 2914}
2915
954c1994
GS		 2916/*
2917=for apidoc sv_setsv_mg
2918
2919Like C<sv_setsv>, but also handles 'set' magic.
2920
2921=cut
2922*/
2923
79072805 2924void
864dbfa3 2925Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr)
ef50df4b
GS		 2926{
2927 sv_setsv(dstr,sstr);
2928 SvSETMAGIC(dstr);
2929}
2930
954c1994
GS		 2931/*
2932=for apidoc sv_setpvn
2933
2934Copies a string into an SV. The C<len> parameter indicates the number of
2935bytes to be copied. Does not handle 'set' magic. See C<sv_setpvn_mg>.
2936
2937=cut
2938*/
2939
ef50df4b 2940void
864dbfa3 2941Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
79072805 2942{
c6f8c383 2943 register char *dptr;
793db0cb
JH		 2944 {
2945 /* len is STRLEN which is unsigned, need to copy to signed */
2946 IV iv = len;
2947 assert(iv >= 0);
2948 }
2213622d 2949 SV_CHECK_THINKFIRST(sv);
463ee0b2 2950 if (!ptr) {
a0d0e21e 2951 (void)SvOK_off(sv);
463ee0b2
LW		 2952 return;
2953 }
6fc92669 2954 (void)SvUPGRADE(sv, SVt_PV);
c6f8c383 2955
79072805 2956 SvGROW(sv, len + 1);
c6f8c383
GA		 2957 dptr = SvPVX(sv);
2958 Move(ptr,dptr,len,char);
2959 dptr[len] = '\0';
79072805 2960 SvCUR_set(sv, len);
a0d0e21e 2961 (void)SvPOK_only(sv); /* validate pointer */
463ee0b2 2962 SvTAINT(sv);
79072805
LW		 2963}
2964
954c1994
GS		 2965/*
2966=for apidoc sv_setpvn_mg
2967
2968Like C<sv_setpvn>, but also handles 'set' magic.
2969
2970=cut
2971*/
2972
79072805 2973void
864dbfa3 2974Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
ef50df4b
GS		 2975{
2976 sv_setpvn(sv,ptr,len);
2977 SvSETMAGIC(sv);
2978}
2979
954c1994
GS		 2980/*
2981=for apidoc sv_setpv
2982
2983Copies a string into an SV. The string must be null-terminated. Does not
2984handle 'set' magic. See C<sv_setpv_mg>.
2985
2986=cut
2987*/
2988
ef50df4b 2989void
864dbfa3 2990Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr)
79072805
LW		 2991{
2992 register STRLEN len;
2993
2213622d 2994 SV_CHECK_THINKFIRST(sv);
463ee0b2 2995 if (!ptr) {
a0d0e21e 2996 (void)SvOK_off(sv);
463ee0b2
LW		 2997 return;
2998 }
79072805 2999 len = strlen(ptr);
6fc92669 3000 (void)SvUPGRADE(sv, SVt_PV);
c6f8c383 3001
79072805 3002 SvGROW(sv, len + 1);
463ee0b2 3003 Move(ptr,SvPVX(sv),len+1,char);
79072805 3004 SvCUR_set(sv, len);
a0d0e21e 3005 (void)SvPOK_only(sv); /* validate pointer */
463ee0b2
LW		 3006 SvTAINT(sv);
3007}
3008
954c1994
GS		 3009/*
3010=for apidoc sv_setpv_mg
3011
3012Like C<sv_setpv>, but also handles 'set' magic.
3013
3014=cut
3015*/
3016
463ee0b2 3017void
864dbfa3 3018Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
ef50df4b
GS		 3019{
3020 sv_setpv(sv,ptr);
3021 SvSETMAGIC(sv);
3022}
3023
954c1994
GS		 3024/*
3025=for apidoc sv_usepvn
3026
3027Tells an SV to use C<ptr> to find its string value. Normally the string is
1c846c1f 3028stored inside the SV but sv_usepvn allows the SV to use an outside string.
954c1994
GS		 3029The C<ptr> should point to memory that was allocated by C<malloc>. The
3030string length, C<len>, must be supplied. This function will realloc the
3031memory pointed to by C<ptr>, so that pointer should not be freed or used by
3032the programmer after giving it to sv_usepvn. Does not handle 'set' magic.
3033See C<sv_usepvn_mg>.
3034
3035=cut
3036*/
3037
ef50df4b 3038void
864dbfa3 3039Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
463ee0b2 3040{
2213622d 3041 SV_CHECK_THINKFIRST(sv);
c6f8c383 3042 (void)SvUPGRADE(sv, SVt_PV);
463ee0b2 3043 if (!ptr) {
a0d0e21e 3044 (void)SvOK_off(sv);
463ee0b2
LW		 3045 return;
3046 }
a0ed51b3 3047 (void)SvOOK_off(sv);
50483b2c 3048 if (SvPVX(sv) && SvLEN(sv))
463ee0b2
LW		 3049 Safefree(SvPVX(sv));
3050 Renew(ptr, len+1, char);
3051 SvPVX(sv) = ptr;
3052 SvCUR_set(sv, len);
3053 SvLEN_set(sv, len+1);
3054 *SvEND(sv) = '\0';
a0d0e21e 3055 (void)SvPOK_only(sv); /* validate pointer */
463ee0b2 3056 SvTAINT(sv);
79072805
LW		 3057}
3058
954c1994
GS		 3059/*
3060=for apidoc sv_usepvn_mg
3061
3062Like C<sv_usepvn>, but also handles 'set' magic.
3063
3064=cut
3065*/
3066
ef50df4b 3067void
864dbfa3 3068Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
ef50df4b 3069{
51c1089b 3070 sv_usepvn(sv,ptr,len);
ef50df4b
GS		 3071 SvSETMAGIC(sv);
3072}
3073
6fc92669 3074void
840a7b70 3075Perl_sv_force_normal_flags(pTHX_ register SV *sv, U32 flags)
0f15f207 3076{
2213622d 3077 if (SvREADONLY(sv)) {
1c846c1f
NIS		 3078 if (SvFAKE(sv)) {
3079 char *pvx = SvPVX(sv);
3080 STRLEN len = SvCUR(sv);
3081 U32 hash = SvUVX(sv);
3082 SvGROW(sv, len + 1);
3083 Move(pvx,SvPVX(sv),len,char);
3084 *SvEND(sv) = '\0';
3085 SvFAKE_off(sv);
3086 SvREADONLY_off(sv);
c3654f1a 3087 unsharepvn(pvx,SvUTF8(sv)?-len:len,hash);
1c846c1f
NIS		 3088 }
3089 else if (PL_curcop != &PL_compiling)
cea2e8a9 3090 Perl_croak(aTHX_ PL_no_modify);
0f15f207 3091 }
2213622d 3092 if (SvROK(sv))
840a7b70 3093 sv_unref_flags(sv, flags);
6fc92669
GS		 3094 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
3095 sv_unglob(sv);
0f15f207 3096}
1c846c1f 3097
840a7b70
IZ		 3098void
3099Perl_sv_force_normal(pTHX_ register SV *sv)
3100{
3101 sv_force_normal_flags(sv, 0);
3102}
3103
954c1994
GS		 3104/*
3105=for apidoc sv_chop
3106
1c846c1f 3107Efficient removal of characters from the beginning of the string buffer.
954c1994
GS		 3108SvPOK(sv) must be true and the C<ptr> must be a pointer to somewhere inside
3109the string buffer. The C<ptr> becomes the first character of the adjusted
3110string.
3111
3112=cut
3113*/
3114
79072805 3115void
864dbfa3 3116Perl_sv_chop(pTHX_ register SV *sv, register char *ptr) /* like set but assuming ptr is in sv */
1c846c1f
NIS		 3117
3118
79072805
LW		 3119{
3120 register STRLEN delta;
3121
a0d0e21e 3122 if (!ptr || !SvPOKp(sv))
79072805 3123 return;
2213622d 3124 SV_CHECK_THINKFIRST(sv);
79072805
LW		 3125 if (SvTYPE(sv) < SVt_PVIV)
3126 sv_upgrade(sv,SVt_PVIV);
3127
3128 if (!SvOOK(sv)) {
50483b2c
JD		 3129 if (!SvLEN(sv)) { /* make copy of shared string */
3130 char *pvx = SvPVX(sv);
3131 STRLEN len = SvCUR(sv);
3132 SvGROW(sv, len + 1);
3133 Move(pvx,SvPVX(sv),len,char);
3134 *SvEND(sv) = '\0';
3135 }
463ee0b2 3136 SvIVX(sv) = 0;
79072805
LW		 3137 SvFLAGS(sv) |= SVf_OOK;
3138 }
25da4f38 3139 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVp_IOK|SVp_NOK|SVf_IVisUV);
463ee0b2 3140 delta = ptr - SvPVX(sv);
79072805
LW		 3141 SvLEN(sv) -= delta;
3142 SvCUR(sv) -= delta;
463ee0b2
LW		 3143 SvPVX(sv) += delta;
3144 SvIVX(sv) += delta;
79072805
LW		 3145}
3146
954c1994
GS		 3147/*
3148=for apidoc sv_catpvn
3149
3150Concatenates the string onto the end of the string which is in the SV. The
3151C<len> indicates number of bytes to copy. Handles 'get' magic, but not
3152'set' magic. See C<sv_catpvn_mg>.
3153
3154=cut
3155*/
3156
79072805 3157void
864dbfa3 3158Perl_sv_catpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
79072805 3159{
463ee0b2 3160 STRLEN tlen;
748a9306 3161 char *junk;
a0d0e21e 3162
748a9306 3163 junk = SvPV_force(sv, tlen);
463ee0b2 3164 SvGROW(sv, tlen + len + 1);
4633a7c4
LW		 3165 if (ptr == junk)
3166 ptr = SvPVX(sv);
463ee0b2 3167 Move(ptr,SvPVX(sv)+tlen,len,char);
79072805
LW		 3168 SvCUR(sv) += len;
3169 *SvEND(sv) = '\0';
d41ff1b8 3170 (void)SvPOK_only_UTF8(sv); /* validate pointer */
463ee0b2 3171 SvTAINT(sv);
79072805
LW		 3172}
3173
954c1994
GS		 3174/*
3175=for apidoc sv_catpvn_mg
3176
3177Like C<sv_catpvn>, but also handles 'set' magic.
3178
3179=cut
3180*/
3181
79072805 3182void
864dbfa3 3183Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
ef50df4b
GS		 3184{
3185 sv_catpvn(sv,ptr,len);
3186 SvSETMAGIC(sv);
3187}
3188
954c1994
GS		 3189/*
3190=for apidoc sv_catsv
3191
3192Concatenates the string from SV C<ssv> onto the end of the string in SV
3193C<dsv>. Handles 'get' magic, but not 'set' magic. See C<sv_catsv_mg>.
3194
3195=cut
3196*/
3197
ef50df4b 3198void
864dbfa3 3199Perl_sv_catsv(pTHX_ SV *dstr, register SV *sstr)
79072805
LW		 3200{
3201 char *s;
463ee0b2 3202 STRLEN len;
79072805
LW		 3203 if (!sstr)
3204 return;
155aba94 3205 if ((s = SvPV(sstr, len))) {
e84ff256 3206 if (DO_UTF8(sstr)) {
560a288e 3207 sv_utf8_upgrade(dstr);
e84ff256 3208 sv_catpvn(dstr,s,len);
560a288e 3209 SvUTF8_on(dstr);
e84ff256
GS		 3210 }
3211 else
3212 sv_catpvn(dstr,s,len);
560a288e 3213 }
79072805
LW		 3214}
3215
954c1994
GS		 3216/*
3217=for apidoc sv_catsv_mg
3218
3219Like C<sv_catsv>, but also handles 'set' magic.
3220
3221=cut
3222*/
3223
79072805 3224void
864dbfa3 3225Perl_sv_catsv_mg(pTHX_ SV *dstr, register SV *sstr)
ef50df4b
GS		 3226{
3227 sv_catsv(dstr,sstr);
3228 SvSETMAGIC(dstr);
3229}
3230
954c1994
GS		 3231/*
3232=for apidoc sv_catpv
3233
3234Concatenates the string onto the end of the string which is in the SV.
3235Handles 'get' magic, but not 'set' magic. See C<sv_catpv_mg>.
3236
3237=cut
3238*/
3239
ef50df4b 3240void
864dbfa3 3241Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr)
79072805
LW		 3242{
3243 register STRLEN len;
463ee0b2 3244 STRLEN tlen;
748a9306 3245 char *junk;
79072805 3246
79072805
LW		 3247 if (!ptr)
3248 return;
748a9306 3249 junk = SvPV_force(sv, tlen);
79072805 3250 len = strlen(ptr);
463ee0b2 3251 SvGROW(sv, tlen + len + 1);
4633a7c4
LW		 3252 if (ptr == junk)
3253 ptr = SvPVX(sv);
463ee0b2 3254 Move(ptr,SvPVX(sv)+tlen,len+1,char);
79072805 3255 SvCUR(sv) += len;
d41ff1b8 3256 (void)SvPOK_only_UTF8(sv); /* validate pointer */
463ee0b2 3257 SvTAINT(sv);
79072805
LW		 3258}
3259
954c1994
GS		 3260/*
3261=for apidoc sv_catpv_mg
3262
3263Like C<sv_catpv>, but also handles 'set' magic.
3264
3265=cut
3266*/
3267
ef50df4b 3268void
864dbfa3 3269Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr)
ef50df4b 3270{
51c1089b 3271 sv_catpv(sv,ptr);
ef50df4b
GS		 3272 SvSETMAGIC(sv);
3273}
3274
79072805 3275SV *
864dbfa3 3276Perl_newSV(pTHX_ STRLEN len)
79072805
LW		 3277{
3278 register SV *sv;
1c846c1f 3279
4561caa4 3280 new_SV(sv);
79072805
LW		 3281 if (len) {
3282 sv_upgrade(sv, SVt_PV);
3283 SvGROW(sv, len + 1);
3284 }
3285 return sv;
3286}
3287
1edc1566 3288/* name is assumed to contain an SV* if (name && namelen == HEf_SVKEY) */
3289
954c1994
GS		 3290/*
3291=for apidoc sv_magic
3292
3293Adds magic to an SV.
3294
3295=cut
3296*/
3297
79072805 3298void
864dbfa3 3299Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen)
79072805
LW		 3300{
3301 MAGIC* mg;
1c846c1f 3302
0f15f207 3303 if (SvREADONLY(sv)) {
3280af22 3304 if (PL_curcop != &PL_compiling && !strchr("gBf", how))
cea2e8a9 3305 Perl_croak(aTHX_ PL_no_modify);
0f15f207 3306 }
4633a7c4 3307 if (SvMAGICAL(sv) || (how == 't' && SvTYPE(sv) >= SVt_PVMG)) {
748a9306
LW		 3308 if (SvMAGIC(sv) && (mg = mg_find(sv, how))) {
3309 if (how == 't')
565764a8 3310 mg->mg_len |= 1;
463ee0b2 3311 return;
748a9306 3312 }
463ee0b2
LW		 3313 }
3314 else {
c6f8c383 3315 (void)SvUPGRADE(sv, SVt_PVMG);
463ee0b2 3316 }
79072805
LW		 3317 Newz(702,mg, 1, MAGIC);
3318 mg->mg_moremagic = SvMAGIC(sv);
463ee0b2 3319
79072805 3320 SvMAGIC(sv) = mg;
c277df42 3321 if (!obj || obj == sv || how == '#' || how == 'r')
8990e307 3322 mg->mg_obj = obj;
85e6fe83 3323 else {
8990e307 3324 mg->mg_obj = SvREFCNT_inc(obj);
85e6fe83
LW		 3325 mg->mg_flags |= MGf_REFCOUNTED;
3326 }
79072805 3327 mg->mg_type = how;
565764a8 3328 mg->mg_len = namlen;
1edc1566 3329 if (name)
3330 if (namlen >= 0)
3331 mg->mg_ptr = savepvn(name, namlen);
c6ee37c5 3332 else if (namlen == HEf_SVKEY)
1edc1566 3333 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
1c846c1f 3334
79072805
LW		 3335 switch (how) {
3336 case 0:
22c35a8c 3337 mg->mg_virtual = &PL_vtbl_sv;
79072805 3338 break;
a0d0e21e 3339 case 'A':
22c35a8c 3340 mg->mg_virtual = &PL_vtbl_amagic;
a0d0e21e
LW		 3341 break;
3342 case 'a':
22c35a8c 3343 mg->mg_virtual = &PL_vtbl_amagicelem;
a0d0e21e
LW		 3344 break;
3345 case 'c':
3346 mg->mg_virtual = 0;
3347 break;
79072805 3348 case 'B':
22c35a8c 3349 mg->mg_virtual = &PL_vtbl_bm;
79072805 3350 break;
6cef1e77 3351 case 'D':
22c35a8c 3352 mg->mg_virtual = &PL_vtbl_regdata;
6cef1e77
IZ		 3353 break;
3354 case 'd':
22c35a8c 3355 mg->mg_virtual = &PL_vtbl_regdatum;
6cef1e77 3356 break;
79072805 3357 case 'E':
22c35a8c 3358 mg->mg_virtual = &PL_vtbl_env;
79072805 3359 break;
55497cff 3360 case 'f':
22c35a8c 3361 mg->mg_virtual = &PL_vtbl_fm;
55497cff 3362 break;
79072805 3363 case 'e':
22c35a8c 3364 mg->mg_virtual = &PL_vtbl_envelem;
79072805 3365 break;
93a17b20 3366 case 'g':
22c35a8c 3367 mg->mg_virtual = &PL_vtbl_mglob;
93a17b20 3368 break;
463ee0b2 3369 case 'I':
22c35a8c 3370 mg->mg_virtual = &PL_vtbl_isa;
463ee0b2
LW		 3371 break;
3372 case 'i':
22c35a8c 3373 mg->mg_virtual = &PL_vtbl_isaelem;
463ee0b2 3374 break;
16660edb 3375 case 'k':
22c35a8c 3376 mg->mg_virtual = &PL_vtbl_nkeys;
16660edb 3377 break;
79072805 3378 case 'L':
a0d0e21e 3379 SvRMAGICAL_on(sv);
93a17b20
LW		 3380 mg->mg_virtual = 0;
3381 break;
3382 case 'l':
22c35a8c 3383 mg->mg_virtual = &PL_vtbl_dbline;
79072805 3384 break;
f93b4edd
MB		 3385#ifdef USE_THREADS
3386 case 'm':
22c35a8c 3387 mg->mg_virtual = &PL_vtbl_mutex;
f93b4edd
MB		 3388 break;
3389#endif /* USE_THREADS */
36477c24 3390#ifdef USE_LOCALE_COLLATE
bbce6d69 3391 case 'o':
22c35a8c 3392 mg->mg_virtual = &PL_vtbl_collxfrm;
bbce6d69 3393 break;
36477c24 3394#endif /* USE_LOCALE_COLLATE */
463ee0b2 3395 case 'P':
22c35a8c 3396 mg->mg_virtual = &PL_vtbl_pack;
463ee0b2
LW		 3397 break;
3398 case 'p':
a0d0e21e 3399 case 'q':
22c35a8c 3400 mg->mg_virtual = &PL_vtbl_packelem;
463ee0b2 3401 break;
c277df42 3402 case 'r':
22c35a8c 3403 mg->mg_virtual = &PL_vtbl_regexp;
c277df42 3404 break;
79072805 3405 case 'S':
22c35a8c 3406 mg->mg_virtual = &PL_vtbl_sig;
79072805
LW		 3407 break;
3408 case 's':
22c35a8c 3409 mg->mg_virtual = &PL_vtbl_sigelem;
79072805 3410 break;
463ee0b2 3411 case 't':
22c35a8c 3412 mg->mg_virtual = &PL_vtbl_taint;
565764a8 3413 mg->mg_len = 1;
463ee0b2 3414 break;
79072805 3415 case 'U':
22c35a8c 3416 mg->mg_virtual = &PL_vtbl_uvar;
79072805
LW		 3417 break;
3418 case 'v':
22c35a8c 3419 mg->mg_virtual = &PL_vtbl_vec;
79072805
LW		 3420 break;
3421 case 'x':
22c35a8c 3422 mg->mg_virtual = &PL_vtbl_substr;
79072805 3423 break;
5f05dabc 3424 case 'y':
22c35a8c 3425 mg->mg_virtual = &PL_vtbl_defelem;
5f05dabc 3426 break;
79072805 3427 case '*':
22c35a8c 3428 mg->mg_virtual = &PL_vtbl_glob;
79072805
LW		 3429 break;
3430 case '#':
22c35a8c 3431 mg->mg_virtual = &PL_vtbl_arylen;
79072805 3432 break;
a0d0e21e 3433 case '.':
22c35a8c 3434 mg->mg_virtual = &PL_vtbl_pos;
a0d0e21e 3435 break;
810b8aa5
GS		 3436 case '<':
3437 mg->mg_virtual = &PL_vtbl_backref;
3438 break;
4633a7c4
LW		 3439 case '~': /* Reserved for use by extensions not perl internals. */
3440 /* Useful for attaching extension internal data to perl vars. */
3441 /* Note that multiple extensions may clash if magical scalars */
3442 /* etc holding private data from one are passed to another. */
3443 SvRMAGICAL_on(sv);
a0d0e21e 3444 break;
79072805 3445 default:
cea2e8a9 3446 Perl_croak(aTHX_ "Don't know how to handle magic of type '%c'", how);
463ee0b2 3447 }
8990e307
LW		 3448 mg_magical(sv);
3449 if (SvGMAGICAL(sv))
3450 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
463ee0b2
LW		 3451}
3452
c461cf8f
JH		 3453/*
3454=for apidoc sv_unmagic
3455
3456Removes magic from an SV.
3457
3458=cut
3459*/
3460
463ee0b2 3461int
864dbfa3 3462Perl_sv_unmagic(pTHX_ SV *sv, int type)
463ee0b2
LW		 3463{
3464 MAGIC* mg;
3465 MAGIC** mgp;
91bba347 3466 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
463ee0b2
LW		 3467 return 0;
3468 mgp = &SvMAGIC(sv);
3469 for (mg = *mgp; mg; mg = *mgp) {
3470 if (mg->mg_type == type) {
3471 MGVTBL* vtbl = mg->mg_virtual;
3472 *mgp = mg->mg_moremagic;
1d7c1841 3473 if (vtbl && vtbl->svt_free)
fc0dc3b3 3474 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
463ee0b2 3475 if (mg->mg_ptr && mg->mg_type != 'g')
565764a8 3476 if (mg->mg_len >= 0)
1edc1566 3477 Safefree(mg->mg_ptr);
565764a8 3478 else if (mg->mg_len == HEf_SVKEY)
1edc1566 3479 SvREFCNT_dec((SV*)mg->mg_ptr);
a0d0e21e
LW		 3480 if (mg->mg_flags & MGf_REFCOUNTED)
3481 SvREFCNT_dec(mg->mg_obj);
463ee0b2
LW		 3482 Safefree(mg);
3483 }
3484 else
3485 mgp = &mg->mg_moremagic;
79072805 3486 }
91bba347 3487 if (!SvMAGIC(sv)) {
463ee0b2 3488 SvMAGICAL_off(sv);
8990e307 3489 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
463ee0b2
LW		 3490 }
3491
3492 return 0;
79072805
LW		 3493}
3494
c461cf8f
JH		 3495/*
3496=for apidoc sv_rvweaken
3497
3498Weaken a reference.
3499
3500=cut
3501*/
3502
810b8aa5 3503SV *
864dbfa3 3504Perl_sv_rvweaken(pTHX_ SV *sv)
810b8aa5
GS		 3505{
3506 SV *tsv;
3507 if (!SvOK(sv)) /* let undefs pass */
3508 return sv;
3509 if (!SvROK(sv))
cea2e8a9 3510 Perl_croak(aTHX_ "Can't weaken a nonreference");
810b8aa5 3511 else if (SvWEAKREF(sv)) {
810b8aa5 3512 if (ckWARN(WARN_MISC))
cea2e8a9 3513 Perl_warner(aTHX_ WARN_MISC, "Reference is already weak");
810b8aa5
GS		 3514 return sv;
3515 }
3516 tsv = SvRV(sv);
3517 sv_add_backref(tsv, sv);
3518 SvWEAKREF_on(sv);
1c846c1f 3519 SvREFCNT_dec(tsv);
810b8aa5
GS		 3520 return sv;
3521}
3522
3523STATIC void
cea2e8a9 3524S_sv_add_backref(pTHX_ SV *tsv, SV *sv)
810b8aa5
GS		 3525{
3526 AV *av;
3527 MAGIC *mg;
3528 if (SvMAGICAL(tsv) && (mg = mg_find(tsv, '<')))
3529 av = (AV*)mg->mg_obj;
3530 else {
3531 av = newAV();
3532 sv_magic(tsv, (SV*)av, '<', NULL, 0);
3533 SvREFCNT_dec(av); /* for sv_magic */
3534 }
3535 av_push(av,sv);
3536}
3537
1c846c1f 3538STATIC void
cea2e8a9 3539S_sv_del_backref(pTHX_ SV *sv)
810b8aa5
GS		 3540{
3541 AV *av;
3542 SV **svp;
3543 I32 i;
3544 SV *tsv = SvRV(sv);
3545 MAGIC *mg;
3546 if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, '<')))
cea2e8a9 3547 Perl_croak(aTHX_ "panic: del_backref");
810b8aa5
GS		 3548 av = (AV *)mg->mg_obj;
3549 svp = AvARRAY(av);
3550 i = AvFILLp(av);
3551 while (i >= 0) {
3552 if (svp[i] == sv) {
3553 svp[i] = &PL_sv_undef; /* XXX */
3554 }
3555 i--;
3556 }
3557}
3558
954c1994
GS		 3559/*
3560=for apidoc sv_insert
3561
3562Inserts a string at the specified offset/length within the SV. Similar to
3563the Perl substr() function.
3564
3565=cut
3566*/
3567
79072805 3568void
864dbfa3 3569Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
79072805
LW		 3570{
3571 register char *big;
3572 register char *mid;
3573 register char *midend;
3574 register char *bigend;
3575 register I32 i;
6ff81951 3576 STRLEN curlen;
1c846c1f 3577
79072805 3578
8990e307 3579 if (!bigstr)
cea2e8a9 3580 Perl_croak(aTHX_ "Can't modify non-existent substring");
6ff81951 3581 SvPV_force(bigstr, curlen);
60fa28ff 3582 (void)SvPOK_only_UTF8(bigstr);
6ff81951
GS		 3583 if (offset + len > curlen) {
3584 SvGROW(bigstr, offset+len+1);
3585 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
3586 SvCUR_set(bigstr, offset+len);
3587 }
79072805 3588
69b47968 3589 SvTAINT(bigstr);
79072805
LW		 3590 i = littlelen - len;
3591 if (i > 0) { /* string might grow */
a0d0e21e 3592 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
79072805
LW		 3593 mid = big + offset + len;
3594 midend = bigend = big + SvCUR(bigstr);
3595 bigend += i;
3596 *bigend = '\0';
3597 while (midend > mid) /* shove everything down */
3598 *--bigend = *--midend;
3599 Move(little,big+offset,littlelen,char);
3600 SvCUR(bigstr) += i;
3601 SvSETMAGIC(bigstr);
3602 return;
3603 }
3604 else if (i == 0) {
463ee0b2 3605 Move(little,SvPVX(bigstr)+offset,len,char);
79072805
LW		 3606 SvSETMAGIC(bigstr);
3607 return;
3608 }
3609
463ee0b2 3610 big = SvPVX(bigstr);
79072805
LW		 3611 mid = big + offset;
3612 midend = mid + len;
3613 bigend = big + SvCUR(bigstr);
3614
3615 if (midend > bigend)
cea2e8a9 3616 Perl_croak(aTHX_ "panic: sv_insert");
79072805
LW		 3617
3618 if (mid - big > bigend - midend) { /* faster to shorten from end */
3619 if (littlelen) {
3620 Move(little, mid, littlelen,char);
3621 mid += littlelen;
3622 }
3623 i = bigend - midend;
3624 if (i > 0) {
3625 Move(midend, mid, i,char);
3626 mid += i;
3627 }
3628 *mid = '\0';
3629 SvCUR_set(bigstr, mid - big);
3630 }
3631 /*SUPPRESS 560*/
155aba94 3632 else if ((i = mid - big)) { /* faster from front */
79072805
LW		 3633 midend -= littlelen;
3634 mid = midend;
3635 sv_chop(bigstr,midend-i);
3636 big += i;
3637 while (i--)
3638 *--midend = *--big;
3639 if (littlelen)
3640 Move(little, mid, littlelen,char);
3641 }
3642 else if (littlelen) {
3643 midend -= littlelen;
3644 sv_chop(bigstr,midend);
3645 Move(little,midend,littlelen,char);
3646 }
3647 else {
3648 sv_chop(bigstr,midend);
3649 }
3650 SvSETMAGIC(bigstr);
3651}
3652
c461cf8f
JH		 3653/*
3654=for apidoc sv_replace
3655
3656Make the first argument a copy of the second, then delete the original.
3657
3658=cut
3659*/
79072805
LW		 3660
3661void
864dbfa3 3662Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv)
79072805
LW		 3663{
3664 U32 refcnt = SvREFCNT(sv);
2213622d 3665 SV_CHECK_THINKFIRST(sv);
0453d815
PM		 3666 if (SvREFCNT(nsv) != 1 && ckWARN_d(WARN_INTERNAL))
3667 Perl_warner(aTHX_ WARN_INTERNAL, "Reference miscount in sv_replace()");
93a17b20 3668 if (SvMAGICAL(sv)) {
a0d0e21e
LW		 3669 if (SvMAGICAL(nsv))
3670 mg_free(nsv);
3671 else
3672 sv_upgrade(nsv, SVt_PVMG);
93a17b20 3673 SvMAGIC(nsv) = SvMAGIC(sv);
a0d0e21e 3674 SvFLAGS(nsv) |= SvMAGICAL(sv);
93a17b20
LW		 3675 SvMAGICAL_off(sv);
3676 SvMAGIC(sv) = 0;
3677 }
79072805
LW		 3678 SvREFCNT(sv) = 0;
3679 sv_clear(sv);
477f5d66 3680 assert(!SvREFCNT(sv));
79072805
LW		 3681 StructCopy(nsv,sv,SV);
3682 SvREFCNT(sv) = refcnt;
1edc1566 3683 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
463ee0b2 3684 del_SV(nsv);
79072805
LW		 3685}
3686
c461cf8f
JH		 3687/*
3688=for apidoc sv_clear
3689
3690Clear an SV, making it empty. Does not free the memory used by the SV
3691itself.
3692
3693=cut
3694*/
3695
79072805 3696void
864dbfa3 3697Perl_sv_clear(pTHX_ register SV *sv)
79072805 3698{
ec12f114 3699 HV* stash;
79072805
LW		 3700 assert(sv);
3701 assert(SvREFCNT(sv) == 0);
3702
ed6116ce 3703 if (SvOBJECT(sv)) {
3280af22 3704 if (PL_defstash) { /* Still have a symbol table? */
4e35701f 3705 djSP;
8ebc5c01 3706 GV* destructor;
837485b6 3707 SV tmpref;
a0d0e21e 3708
837485b6
GS		 3709 Zero(&tmpref, 1, SV);
3710 sv_upgrade(&tmpref, SVt_RV);
3711 SvROK_on(&tmpref);
3712 SvREADONLY_on(&tmpref); /* DESTROY() could be naughty */
3713 SvREFCNT(&tmpref) = 1;
8ebc5c01 3714
4e8e7886
GS		 3715 do {
3716 stash = SvSTASH(sv);
3717 destructor = gv_fetchmethod(SvSTASH(sv), "DESTROY");
3718 if (destructor) {
3719 ENTER;
e788e7d3 3720 PUSHSTACKi(PERLSI_DESTROY);