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lib/b test fixes from Peter Prymmer.
[perl5.git] / sv.c
CommitLineData
a0d0e21e 1/* sv.c
79072805 2 *
3818b22b 3 * Copyright (c) 1991-2000, Larry Wall
79072805
LW		 4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "I wonder what the Entish is for 'yes' and 'no'," he thought.
79072805
LW		 12 */
13
14#include "EXTERN.h"
864dbfa3 15#define PERL_IN_SV_C
79072805 16#include "perl.h"
79072805 17
51371543 18#define FCALL *f
6fc92669 19#define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) sv_force_normal(sv)
2c5424a7 20
51371543
GS		 21static void do_report_used(pTHXo_ SV *sv);
22static void do_clean_objs(pTHXo_ SV *sv);
23#ifndef DISABLE_DESTRUCTOR_KLUDGE
24static void do_clean_named_objs(pTHXo_ SV *sv);
25#endif
26static void do_clean_all(pTHXo_ SV *sv);
27
4561caa4
CS		 28/*
29 * "A time to plant, and a time to uproot what was planted..."
30 */
31
053fc874
GS		 32#define plant_SV(p) \
33 STMT_START { \
34 SvANY(p) = (void *)PL_sv_root; \
35 SvFLAGS(p) = SVTYPEMASK; \
36 PL_sv_root = (p); \
37 --PL_sv_count; \
38 } STMT_END
a0d0e21e 39
fba3b22e 40/* sv_mutex must be held while calling uproot_SV() */
053fc874
GS		 41#define uproot_SV(p) \
42 STMT_START { \
43 (p) = PL_sv_root; \
44 PL_sv_root = (SV*)SvANY(p); \
45 ++PL_sv_count; \
46 } STMT_END
47
48#define new_SV(p) \
49 STMT_START { \
50 LOCK_SV_MUTEX; \
51 if (PL_sv_root) \
52 uproot_SV(p); \
53 else \
54 (p) = more_sv(); \
55 UNLOCK_SV_MUTEX; \
56 SvANY(p) = 0; \
57 SvREFCNT(p) = 1; \
58 SvFLAGS(p) = 0; \
59 } STMT_END
463ee0b2 60
a0d0e21e 61#ifdef DEBUGGING
4561caa4 62
053fc874
GS		 63#define del_SV(p) \
64 STMT_START { \
65 LOCK_SV_MUTEX; \
66 if (PL_debug & 32768) \
67 del_sv(p); \
68 else \
69 plant_SV(p); \
70 UNLOCK_SV_MUTEX; \
71 } STMT_END
a0d0e21e 72
76e3520e 73STATIC void
cea2e8a9 74S_del_sv(pTHX_ SV *p)
463ee0b2 75{
3280af22 76 if (PL_debug & 32768) {
4633a7c4 77 SV* sva;
a0d0e21e
LW		 78 SV* sv;
79 SV* svend;
80 int ok = 0;
3280af22 81 for (sva = PL_sv_arenaroot; sva; sva = (SV *) SvANY(sva)) {
4633a7c4
LW		 82 sv = sva + 1;
83 svend = &sva[SvREFCNT(sva)];
a0d0e21e
LW		 84 if (p >= sv && p < svend)
85 ok = 1;
86 }
87 if (!ok) {
0453d815
PM		 88 if (ckWARN_d(WARN_INTERNAL))
89 Perl_warner(aTHX_ WARN_INTERNAL,
1d7c1841
GS		 90 "Attempt to free non-arena SV: 0x%"UVxf,
91 PTR2UV(p));
a0d0e21e
LW		 92 return;
93 }
94 }
4561caa4 95 plant_SV(p);
463ee0b2 96}
a0d0e21e 97
4561caa4
CS		 98#else /* ! DEBUGGING */
99
100#define del_SV(p) plant_SV(p)
101
102#endif /* DEBUGGING */
463ee0b2 103
4633a7c4 104void
864dbfa3 105Perl_sv_add_arena(pTHX_ char *ptr, U32 size, U32 flags)
463ee0b2 106{
4633a7c4 107 SV* sva = (SV*)ptr;
463ee0b2
LW		 108 register SV* sv;
109 register SV* svend;
14dd3ad8 110 Zero(ptr, size, char);
4633a7c4
LW		 111
112 /* The first SV in an arena isn't an SV. */
3280af22 113 SvANY(sva) = (void *) PL_sv_arenaroot; /* ptr to next arena */
4633a7c4
LW		 114 SvREFCNT(sva) = size / sizeof(SV); /* number of SV slots */
115 SvFLAGS(sva) = flags; /* FAKE if not to be freed */
116
3280af22
NIS		 117 PL_sv_arenaroot = sva;
118 PL_sv_root = sva + 1;
4633a7c4
LW		 119
120 svend = &sva[SvREFCNT(sva) - 1];
121 sv = sva + 1;
463ee0b2 122 while (sv < svend) {
a0d0e21e 123 SvANY(sv) = (void *)(SV*)(sv + 1);
8990e307 124 SvFLAGS(sv) = SVTYPEMASK;
463ee0b2
LW		 125 sv++;
126 }
127 SvANY(sv) = 0;
4633a7c4
LW		 128 SvFLAGS(sv) = SVTYPEMASK;
129}
130
fba3b22e 131/* sv_mutex must be held while calling more_sv() */
76e3520e 132STATIC SV*
cea2e8a9 133S_more_sv(pTHX)
4633a7c4 134{
4561caa4
CS		 135 register SV* sv;
136
3280af22
NIS		 137 if (PL_nice_chunk) {
138 sv_add_arena(PL_nice_chunk, PL_nice_chunk_size, 0);
139 PL_nice_chunk = Nullch;
c07a80fd 140 }
1edc1566 141 else {
142 char *chunk; /* must use New here to match call to */
143 New(704,chunk,1008,char); /* Safefree() in sv_free_arenas() */
144 sv_add_arena(chunk, 1008, 0);
145 }
4561caa4
CS		 146 uproot_SV(sv);
147 return sv;
463ee0b2
LW		 148}
149
76e3520e 150STATIC void
cea2e8a9 151S_visit(pTHX_ SVFUNC_t f)
8990e307 152{
4633a7c4 153 SV* sva;
8990e307
LW		 154 SV* sv;
155 register SV* svend;
156
3280af22 157 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
4633a7c4 158 svend = &sva[SvREFCNT(sva)];
4561caa4
CS		 159 for (sv = sva + 1; sv < svend; ++sv) {
160 if (SvTYPE(sv) != SVTYPEMASK)
51371543 161 (FCALL)(aTHXo_ sv);
8990e307
LW		 162 }
163 }
164}
165
166void
864dbfa3 167Perl_sv_report_used(pTHX)
4561caa4 168{
0b94c7bb 169 visit(do_report_used);
4561caa4
CS		 170}
171
4561caa4 172void
864dbfa3 173Perl_sv_clean_objs(pTHX)
4561caa4 174{
3280af22 175 PL_in_clean_objs = TRUE;
0b94c7bb 176 visit(do_clean_objs);
4561caa4 177#ifndef DISABLE_DESTRUCTOR_KLUDGE
2d0f3c12 178 /* some barnacles may yet remain, clinging to typeglobs */
0b94c7bb 179 visit(do_clean_named_objs);
4561caa4 180#endif
3280af22 181 PL_in_clean_objs = FALSE;
4561caa4
CS		 182}
183
8990e307 184void
864dbfa3 185Perl_sv_clean_all(pTHX)
8990e307 186{
3280af22 187 PL_in_clean_all = TRUE;
0b94c7bb 188 visit(do_clean_all);
3280af22 189 PL_in_clean_all = FALSE;
8990e307 190}
463ee0b2 191
4633a7c4 192void
864dbfa3 193Perl_sv_free_arenas(pTHX)
4633a7c4
LW		 194{
195 SV* sva;
196 SV* svanext;
612f20c3 197 XPV *arena, *arenanext;
4633a7c4
LW		 198
199 /* Free arenas here, but be careful about fake ones. (We assume
200 contiguity of the fake ones with the corresponding real ones.) */
201
3280af22 202 for (sva = PL_sv_arenaroot; sva; sva = svanext) {
4633a7c4
LW		 203 svanext = (SV*) SvANY(sva);
204 while (svanext && SvFAKE(svanext))
205 svanext = (SV*) SvANY(svanext);
206
207 if (!SvFAKE(sva))
1edc1566 208 Safefree((void *)sva);
4633a7c4 209 }
5f05dabc 210
612f20c3
GS		 211 for (arena = PL_xiv_arenaroot; arena; arena = arenanext) {
212 arenanext = (XPV*)arena->xpv_pv;
213 Safefree(arena);
214 }
215 PL_xiv_arenaroot = 0;
216
217 for (arena = PL_xnv_arenaroot; arena; arena = arenanext) {
218 arenanext = (XPV*)arena->xpv_pv;
219 Safefree(arena);
220 }
221 PL_xnv_arenaroot = 0;
222
223 for (arena = PL_xrv_arenaroot; arena; arena = arenanext) {
224 arenanext = (XPV*)arena->xpv_pv;
225 Safefree(arena);
226 }
227 PL_xrv_arenaroot = 0;
228
229 for (arena = PL_xpv_arenaroot; arena; arena = arenanext) {
230 arenanext = (XPV*)arena->xpv_pv;
231 Safefree(arena);
232 }
233 PL_xpv_arenaroot = 0;
234
235 for (arena = (XPV*)PL_xpviv_arenaroot; arena; arena = arenanext) {
236 arenanext = (XPV*)arena->xpv_pv;
237 Safefree(arena);
238 }
239 PL_xpviv_arenaroot = 0;
240
241 for (arena = (XPV*)PL_xpvnv_arenaroot; arena; arena = arenanext) {
242 arenanext = (XPV*)arena->xpv_pv;
243 Safefree(arena);
244 }
245 PL_xpvnv_arenaroot = 0;
246
247 for (arena = (XPV*)PL_xpvcv_arenaroot; arena; arena = arenanext) {
248 arenanext = (XPV*)arena->xpv_pv;
249 Safefree(arena);
250 }
251 PL_xpvcv_arenaroot = 0;
252
253 for (arena = (XPV*)PL_xpvav_arenaroot; arena; arena = arenanext) {
254 arenanext = (XPV*)arena->xpv_pv;
255 Safefree(arena);
256 }
257 PL_xpvav_arenaroot = 0;
258
259 for (arena = (XPV*)PL_xpvhv_arenaroot; arena; arena = arenanext) {
260 arenanext = (XPV*)arena->xpv_pv;
261 Safefree(arena);
262 }
263 PL_xpvhv_arenaroot = 0;
264
265 for (arena = (XPV*)PL_xpvmg_arenaroot; arena; arena = arenanext) {
266 arenanext = (XPV*)arena->xpv_pv;
267 Safefree(arena);
268 }
269 PL_xpvmg_arenaroot = 0;
270
271 for (arena = (XPV*)PL_xpvlv_arenaroot; arena; arena = arenanext) {
272 arenanext = (XPV*)arena->xpv_pv;
273 Safefree(arena);
274 }
275 PL_xpvlv_arenaroot = 0;
276
277 for (arena = (XPV*)PL_xpvbm_arenaroot; arena; arena = arenanext) {
278 arenanext = (XPV*)arena->xpv_pv;
279 Safefree(arena);
280 }
281 PL_xpvbm_arenaroot = 0;
282
283 for (arena = (XPV*)PL_he_arenaroot; arena; arena = arenanext) {
284 arenanext = (XPV*)arena->xpv_pv;
285 Safefree(arena);
286 }
287 PL_he_arenaroot = 0;
288
3280af22
NIS		 289 if (PL_nice_chunk)
290 Safefree(PL_nice_chunk);
291 PL_nice_chunk = Nullch;
292 PL_nice_chunk_size = 0;
293 PL_sv_arenaroot = 0;
294 PL_sv_root = 0;
4633a7c4
LW		 295}
296
1d7c1841
GS		 297void
298Perl_report_uninit(pTHX)
299{
300 if (PL_op)
301 Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit,
302 " in ", PL_op_desc[PL_op->op_type]);
303 else
304 Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit, "", "");
305}
306
76e3520e 307STATIC XPVIV*
cea2e8a9 308S_new_xiv(pTHX)
463ee0b2 309{
ea7c11a3 310 IV* xiv;
cbe51380
GS		 311 LOCK_SV_MUTEX;
312 if (!PL_xiv_root)
313 more_xiv();
314 xiv = PL_xiv_root;
315 /*
316 * See comment in more_xiv() -- RAM.
317 */
318 PL_xiv_root = *(IV**)xiv;
319 UNLOCK_SV_MUTEX;
320 return (XPVIV*)((char*)xiv - STRUCT_OFFSET(XPVIV, xiv_iv));
463ee0b2
LW		 321}
322
76e3520e 323STATIC void
cea2e8a9 324S_del_xiv(pTHX_ XPVIV *p)
463ee0b2 325{
23e6a22f 326 IV* xiv = (IV*)((char*)(p) + STRUCT_OFFSET(XPVIV, xiv_iv));
cbe51380 327 LOCK_SV_MUTEX;
3280af22
NIS		 328 *(IV**)xiv = PL_xiv_root;
329 PL_xiv_root = xiv;
cbe51380 330 UNLOCK_SV_MUTEX;
463ee0b2
LW		 331}
332
cbe51380 333STATIC void
cea2e8a9 334S_more_xiv(pTHX)
463ee0b2 335{
ea7c11a3
SM		 336 register IV* xiv;
337 register IV* xivend;
8c52afec
IZ		 338 XPV* ptr;
339 New(705, ptr, 1008/sizeof(XPV), XPV);
3280af22
NIS		 340 ptr->xpv_pv = (char*)PL_xiv_arenaroot; /* linked list of xiv arenas */
341 PL_xiv_arenaroot = ptr; /* to keep Purify happy */
a0d0e21e 342
ea7c11a3
SM		 343 xiv = (IV*) ptr;
344 xivend = &xiv[1008 / sizeof(IV) - 1];
345 xiv += (sizeof(XPV) - 1) / sizeof(IV) + 1; /* fudge by size of XPV */
3280af22 346 PL_xiv_root = xiv;
463ee0b2 347 while (xiv < xivend) {
ea7c11a3 348 *(IV**)xiv = (IV *)(xiv + 1);
463ee0b2
LW		 349 xiv++;
350 }
ea7c11a3 351 *(IV**)xiv = 0;
463ee0b2
LW		 352}
353
76e3520e 354STATIC XPVNV*
cea2e8a9 355S_new_xnv(pTHX)
463ee0b2 356{
65202027 357 NV* xnv;
cbe51380
GS		 358 LOCK_SV_MUTEX;
359 if (!PL_xnv_root)
360 more_xnv();
361 xnv = PL_xnv_root;
65202027 362 PL_xnv_root = *(NV**)xnv;
cbe51380
GS		 363 UNLOCK_SV_MUTEX;
364 return (XPVNV*)((char*)xnv - STRUCT_OFFSET(XPVNV, xnv_nv));
463ee0b2
LW		 365}
366
76e3520e 367STATIC void
cea2e8a9 368S_del_xnv(pTHX_ XPVNV *p)
463ee0b2 369{
65202027 370 NV* xnv = (NV*)((char*)(p) + STRUCT_OFFSET(XPVNV, xnv_nv));
cbe51380 371 LOCK_SV_MUTEX;
65202027 372 *(NV**)xnv = PL_xnv_root;
3280af22 373 PL_xnv_root = xnv;
cbe51380 374 UNLOCK_SV_MUTEX;
463ee0b2
LW		 375}
376
cbe51380 377STATIC void
cea2e8a9 378S_more_xnv(pTHX)
463ee0b2 379{
65202027
DS		 380 register NV* xnv;
381 register NV* xnvend;
612f20c3
GS		 382 XPV *ptr;
383 New(711, ptr, 1008/sizeof(XPV), XPV);
384 ptr->xpv_pv = (char*)PL_xnv_arenaroot;
385 PL_xnv_arenaroot = ptr;
386
387 xnv = (NV*) ptr;
65202027
DS		 388 xnvend = &xnv[1008 / sizeof(NV) - 1];
389 xnv += (sizeof(XPVIV) - 1) / sizeof(NV) + 1; /* fudge by sizeof XPVIV */
3280af22 390 PL_xnv_root = xnv;
463ee0b2 391 while (xnv < xnvend) {
65202027 392 *(NV**)xnv = (NV*)(xnv + 1);
463ee0b2
LW		 393 xnv++;
394 }
65202027 395 *(NV**)xnv = 0;
463ee0b2
LW		 396}
397
76e3520e 398STATIC XRV*
cea2e8a9 399S_new_xrv(pTHX)
ed6116ce
LW		 400{
401 XRV* xrv;
cbe51380
GS		 402 LOCK_SV_MUTEX;
403 if (!PL_xrv_root)
404 more_xrv();
405 xrv = PL_xrv_root;
406 PL_xrv_root = (XRV*)xrv->xrv_rv;
407 UNLOCK_SV_MUTEX;
408 return xrv;
ed6116ce
LW		 409}
410
76e3520e 411STATIC void
cea2e8a9 412S_del_xrv(pTHX_ XRV *p)
ed6116ce 413{
cbe51380 414 LOCK_SV_MUTEX;
3280af22
NIS		 415 p->xrv_rv = (SV*)PL_xrv_root;
416 PL_xrv_root = p;
cbe51380 417 UNLOCK_SV_MUTEX;
ed6116ce
LW		 418}
419
cbe51380 420STATIC void
cea2e8a9 421S_more_xrv(pTHX)
ed6116ce 422{
ed6116ce
LW		 423 register XRV* xrv;
424 register XRV* xrvend;
612f20c3
GS		 425 XPV *ptr;
426 New(712, ptr, 1008/sizeof(XPV), XPV);
427 ptr->xpv_pv = (char*)PL_xrv_arenaroot;
428 PL_xrv_arenaroot = ptr;
429
430 xrv = (XRV*) ptr;
ed6116ce 431 xrvend = &xrv[1008 / sizeof(XRV) - 1];
612f20c3
GS		 432 xrv += (sizeof(XPV) - 1) / sizeof(XRV) + 1;
433 PL_xrv_root = xrv;
ed6116ce
LW		 434 while (xrv < xrvend) {
435 xrv->xrv_rv = (SV*)(xrv + 1);
436 xrv++;
437 }
438 xrv->xrv_rv = 0;
ed6116ce
LW		 439}
440
76e3520e 441STATIC XPV*
cea2e8a9 442S_new_xpv(pTHX)
463ee0b2
LW		 443{
444 XPV* xpv;
cbe51380
GS		 445 LOCK_SV_MUTEX;
446 if (!PL_xpv_root)
447 more_xpv();
448 xpv = PL_xpv_root;
449 PL_xpv_root = (XPV*)xpv->xpv_pv;
450 UNLOCK_SV_MUTEX;
451 return xpv;
463ee0b2
LW		 452}
453
76e3520e 454STATIC void
cea2e8a9 455S_del_xpv(pTHX_ XPV *p)
463ee0b2 456{
cbe51380 457 LOCK_SV_MUTEX;
3280af22
NIS		 458 p->xpv_pv = (char*)PL_xpv_root;
459 PL_xpv_root = p;
cbe51380 460 UNLOCK_SV_MUTEX;
463ee0b2
LW		 461}
462
cbe51380 463STATIC void
cea2e8a9 464S_more_xpv(pTHX)
463ee0b2 465{
463ee0b2
LW		 466 register XPV* xpv;
467 register XPV* xpvend;
612f20c3
GS		 468 New(713, xpv, 1008/sizeof(XPV), XPV);
469 xpv->xpv_pv = (char*)PL_xpv_arenaroot;
470 PL_xpv_arenaroot = xpv;
471
463ee0b2 472 xpvend = &xpv[1008 / sizeof(XPV) - 1];
612f20c3 473 PL_xpv_root = ++xpv;
463ee0b2
LW		 474 while (xpv < xpvend) {
475 xpv->xpv_pv = (char*)(xpv + 1);
476 xpv++;
477 }
478 xpv->xpv_pv = 0;
463ee0b2
LW		 479}
480
932e9ff9
VB		 481STATIC XPVIV*
482S_new_xpviv(pTHX)
483{
484 XPVIV* xpviv;
485 LOCK_SV_MUTEX;
486 if (!PL_xpviv_root)
487 more_xpviv();
488 xpviv = PL_xpviv_root;
489 PL_xpviv_root = (XPVIV*)xpviv->xpv_pv;
490 UNLOCK_SV_MUTEX;
491 return xpviv;
492}
493
494STATIC void
495S_del_xpviv(pTHX_ XPVIV *p)
496{
497 LOCK_SV_MUTEX;
498 p->xpv_pv = (char*)PL_xpviv_root;
499 PL_xpviv_root = p;
500 UNLOCK_SV_MUTEX;
501}
502
932e9ff9
VB		 503STATIC void
504S_more_xpviv(pTHX)
505{
506 register XPVIV* xpviv;
507 register XPVIV* xpvivend;
612f20c3
GS		 508 New(714, xpviv, 1008/sizeof(XPVIV), XPVIV);
509 xpviv->xpv_pv = (char*)PL_xpviv_arenaroot;
510 PL_xpviv_arenaroot = xpviv;
511
932e9ff9 512 xpvivend = &xpviv[1008 / sizeof(XPVIV) - 1];
612f20c3 513 PL_xpviv_root = ++xpviv;
932e9ff9
VB		 514 while (xpviv < xpvivend) {
515 xpviv->xpv_pv = (char*)(xpviv + 1);
516 xpviv++;
517 }
518 xpviv->xpv_pv = 0;
519}
520
932e9ff9
VB		 521STATIC XPVNV*
522S_new_xpvnv(pTHX)
523{
524 XPVNV* xpvnv;
525 LOCK_SV_MUTEX;
526 if (!PL_xpvnv_root)
527 more_xpvnv();
528 xpvnv = PL_xpvnv_root;
529 PL_xpvnv_root = (XPVNV*)xpvnv->xpv_pv;
530 UNLOCK_SV_MUTEX;
531 return xpvnv;
532}
533
534STATIC void
535S_del_xpvnv(pTHX_ XPVNV *p)
536{
537 LOCK_SV_MUTEX;
538 p->xpv_pv = (char*)PL_xpvnv_root;
539 PL_xpvnv_root = p;
540 UNLOCK_SV_MUTEX;
541}
542
932e9ff9
VB		 543STATIC void
544S_more_xpvnv(pTHX)
545{
546 register XPVNV* xpvnv;
547 register XPVNV* xpvnvend;
612f20c3
GS		 548 New(715, xpvnv, 1008/sizeof(XPVNV), XPVNV);
549 xpvnv->xpv_pv = (char*)PL_xpvnv_arenaroot;
550 PL_xpvnv_arenaroot = xpvnv;
551
932e9ff9 552 xpvnvend = &xpvnv[1008 / sizeof(XPVNV) - 1];
612f20c3 553 PL_xpvnv_root = ++xpvnv;
932e9ff9
VB		 554 while (xpvnv < xpvnvend) {
555 xpvnv->xpv_pv = (char*)(xpvnv + 1);
556 xpvnv++;
557 }
558 xpvnv->xpv_pv = 0;
559}
560
932e9ff9
VB		 561STATIC XPVCV*
562S_new_xpvcv(pTHX)
563{
564 XPVCV* xpvcv;
565 LOCK_SV_MUTEX;
566 if (!PL_xpvcv_root)
567 more_xpvcv();
568 xpvcv = PL_xpvcv_root;
569 PL_xpvcv_root = (XPVCV*)xpvcv->xpv_pv;
570 UNLOCK_SV_MUTEX;
571 return xpvcv;
572}
573
574STATIC void
575S_del_xpvcv(pTHX_ XPVCV *p)
576{
577 LOCK_SV_MUTEX;
578 p->xpv_pv = (char*)PL_xpvcv_root;
579 PL_xpvcv_root = p;
580 UNLOCK_SV_MUTEX;
581}
582
932e9ff9
VB		 583STATIC void
584S_more_xpvcv(pTHX)
585{
586 register XPVCV* xpvcv;
587 register XPVCV* xpvcvend;
612f20c3
GS		 588 New(716, xpvcv, 1008/sizeof(XPVCV), XPVCV);
589 xpvcv->xpv_pv = (char*)PL_xpvcv_arenaroot;
590 PL_xpvcv_arenaroot = xpvcv;
591
932e9ff9 592 xpvcvend = &xpvcv[1008 / sizeof(XPVCV) - 1];
612f20c3 593 PL_xpvcv_root = ++xpvcv;
932e9ff9
VB		 594 while (xpvcv < xpvcvend) {
595 xpvcv->xpv_pv = (char*)(xpvcv + 1);
596 xpvcv++;
597 }
598 xpvcv->xpv_pv = 0;
599}
600
932e9ff9
VB		 601STATIC XPVAV*
602S_new_xpvav(pTHX)
603{
604 XPVAV* xpvav;
605 LOCK_SV_MUTEX;
606 if (!PL_xpvav_root)
607 more_xpvav();
608 xpvav = PL_xpvav_root;
609 PL_xpvav_root = (XPVAV*)xpvav->xav_array;
610 UNLOCK_SV_MUTEX;
611 return xpvav;
612}
613
614STATIC void
615S_del_xpvav(pTHX_ XPVAV *p)
616{
617 LOCK_SV_MUTEX;
618 p->xav_array = (char*)PL_xpvav_root;
619 PL_xpvav_root = p;
620 UNLOCK_SV_MUTEX;
621}
622
932e9ff9
VB		 623STATIC void
624S_more_xpvav(pTHX)
625{
626 register XPVAV* xpvav;
627 register XPVAV* xpvavend;
612f20c3
GS		 628 New(717, xpvav, 1008/sizeof(XPVAV), XPVAV);
629 xpvav->xav_array = (char*)PL_xpvav_arenaroot;
630 PL_xpvav_arenaroot = xpvav;
631
932e9ff9 632 xpvavend = &xpvav[1008 / sizeof(XPVAV) - 1];
612f20c3 633 PL_xpvav_root = ++xpvav;
932e9ff9
VB		 634 while (xpvav < xpvavend) {
635 xpvav->xav_array = (char*)(xpvav + 1);
636 xpvav++;
637 }
638 xpvav->xav_array = 0;
639}
640
932e9ff9
VB		 641STATIC XPVHV*
642S_new_xpvhv(pTHX)
643{
644 XPVHV* xpvhv;
645 LOCK_SV_MUTEX;
646 if (!PL_xpvhv_root)
647 more_xpvhv();
648 xpvhv = PL_xpvhv_root;
649 PL_xpvhv_root = (XPVHV*)xpvhv->xhv_array;
650 UNLOCK_SV_MUTEX;
651 return xpvhv;
652}
653
654STATIC void
655S_del_xpvhv(pTHX_ XPVHV *p)
656{
657 LOCK_SV_MUTEX;
658 p->xhv_array = (char*)PL_xpvhv_root;
659 PL_xpvhv_root = p;
660 UNLOCK_SV_MUTEX;
661}
662
932e9ff9
VB		 663STATIC void
664S_more_xpvhv(pTHX)
665{
666 register XPVHV* xpvhv;
667 register XPVHV* xpvhvend;
612f20c3
GS		 668 New(718, xpvhv, 1008/sizeof(XPVHV), XPVHV);
669 xpvhv->xhv_array = (char*)PL_xpvhv_arenaroot;
670 PL_xpvhv_arenaroot = xpvhv;
671
932e9ff9 672 xpvhvend = &xpvhv[1008 / sizeof(XPVHV) - 1];
612f20c3 673 PL_xpvhv_root = ++xpvhv;
932e9ff9
VB		 674 while (xpvhv < xpvhvend) {
675 xpvhv->xhv_array = (char*)(xpvhv + 1);
676 xpvhv++;
677 }
678 xpvhv->xhv_array = 0;
679}
680
932e9ff9
VB		 681STATIC XPVMG*
682S_new_xpvmg(pTHX)
683{
684 XPVMG* xpvmg;
685 LOCK_SV_MUTEX;
686 if (!PL_xpvmg_root)
687 more_xpvmg();
688 xpvmg = PL_xpvmg_root;
689 PL_xpvmg_root = (XPVMG*)xpvmg->xpv_pv;
690 UNLOCK_SV_MUTEX;
691 return xpvmg;
692}
693
694STATIC void
695S_del_xpvmg(pTHX_ XPVMG *p)
696{
697 LOCK_SV_MUTEX;
698 p->xpv_pv = (char*)PL_xpvmg_root;
699 PL_xpvmg_root = p;
700 UNLOCK_SV_MUTEX;
701}
702
932e9ff9
VB		 703STATIC void
704S_more_xpvmg(pTHX)
705{
706 register XPVMG* xpvmg;
707 register XPVMG* xpvmgend;
612f20c3
GS		 708 New(719, xpvmg, 1008/sizeof(XPVMG), XPVMG);
709 xpvmg->xpv_pv = (char*)PL_xpvmg_arenaroot;
710 PL_xpvmg_arenaroot = xpvmg;
711
932e9ff9 712 xpvmgend = &xpvmg[1008 / sizeof(XPVMG) - 1];
612f20c3 713 PL_xpvmg_root = ++xpvmg;
932e9ff9
VB		 714 while (xpvmg < xpvmgend) {
715 xpvmg->xpv_pv = (char*)(xpvmg + 1);
716 xpvmg++;
717 }
718 xpvmg->xpv_pv = 0;
719}
720
932e9ff9
VB		 721STATIC XPVLV*
722S_new_xpvlv(pTHX)
723{
724 XPVLV* xpvlv;
725 LOCK_SV_MUTEX;
726 if (!PL_xpvlv_root)
727 more_xpvlv();
728 xpvlv = PL_xpvlv_root;
729 PL_xpvlv_root = (XPVLV*)xpvlv->xpv_pv;
730 UNLOCK_SV_MUTEX;
731 return xpvlv;
732}
733
734STATIC void
735S_del_xpvlv(pTHX_ XPVLV *p)
736{
737 LOCK_SV_MUTEX;
738 p->xpv_pv = (char*)PL_xpvlv_root;
739 PL_xpvlv_root = p;
740 UNLOCK_SV_MUTEX;
741}
742
932e9ff9
VB		 743STATIC void
744S_more_xpvlv(pTHX)
745{
746 register XPVLV* xpvlv;
747 register XPVLV* xpvlvend;
612f20c3
GS		 748 New(720, xpvlv, 1008/sizeof(XPVLV), XPVLV);
749 xpvlv->xpv_pv = (char*)PL_xpvlv_arenaroot;
750 PL_xpvlv_arenaroot = xpvlv;
751
932e9ff9 752 xpvlvend = &xpvlv[1008 / sizeof(XPVLV) - 1];
612f20c3 753 PL_xpvlv_root = ++xpvlv;
932e9ff9
VB		 754 while (xpvlv < xpvlvend) {
755 xpvlv->xpv_pv = (char*)(xpvlv + 1);
756 xpvlv++;
757 }
758 xpvlv->xpv_pv = 0;
759}
760
932e9ff9
VB		 761STATIC XPVBM*
762S_new_xpvbm(pTHX)
763{
764 XPVBM* xpvbm;
765 LOCK_SV_MUTEX;
766 if (!PL_xpvbm_root)
767 more_xpvbm();
768 xpvbm = PL_xpvbm_root;
769 PL_xpvbm_root = (XPVBM*)xpvbm->xpv_pv;
770 UNLOCK_SV_MUTEX;
771 return xpvbm;
772}
773
774STATIC void
775S_del_xpvbm(pTHX_ XPVBM *p)
776{
777 LOCK_SV_MUTEX;
778 p->xpv_pv = (char*)PL_xpvbm_root;
779 PL_xpvbm_root = p;
780 UNLOCK_SV_MUTEX;
781}
782
932e9ff9
VB		 783STATIC void
784S_more_xpvbm(pTHX)
785{
786 register XPVBM* xpvbm;
787 register XPVBM* xpvbmend;
612f20c3
GS		 788 New(721, xpvbm, 1008/sizeof(XPVBM), XPVBM);
789 xpvbm->xpv_pv = (char*)PL_xpvbm_arenaroot;
790 PL_xpvbm_arenaroot = xpvbm;
791
932e9ff9 792 xpvbmend = &xpvbm[1008 / sizeof(XPVBM) - 1];
612f20c3 793 PL_xpvbm_root = ++xpvbm;
932e9ff9
VB		 794 while (xpvbm < xpvbmend) {
795 xpvbm->xpv_pv = (char*)(xpvbm + 1);
796 xpvbm++;
797 }
798 xpvbm->xpv_pv = 0;
799}
800
d33b2eba
GS		 801#ifdef LEAKTEST
802# define my_safemalloc(s) (void*)safexmalloc(717,s)
803# define my_safefree(p) safexfree((char*)p)
804#else
805# define my_safemalloc(s) (void*)safemalloc(s)
806# define my_safefree(p) safefree((char*)p)
807#endif
463ee0b2 808
d33b2eba 809#ifdef PURIFY
463ee0b2 810
d33b2eba
GS		 811#define new_XIV() my_safemalloc(sizeof(XPVIV))
812#define del_XIV(p) my_safefree(p)
ed6116ce 813
d33b2eba
GS		 814#define new_XNV() my_safemalloc(sizeof(XPVNV))
815#define del_XNV(p) my_safefree(p)
463ee0b2 816
d33b2eba
GS		 817#define new_XRV() my_safemalloc(sizeof(XRV))
818#define del_XRV(p) my_safefree(p)
8c52afec 819
d33b2eba
GS		 820#define new_XPV() my_safemalloc(sizeof(XPV))
821#define del_XPV(p) my_safefree(p)
9b94d1dd 822
d33b2eba
GS		 823#define new_XPVIV() my_safemalloc(sizeof(XPVIV))
824#define del_XPVIV(p) my_safefree(p)
932e9ff9 825
d33b2eba
GS		 826#define new_XPVNV() my_safemalloc(sizeof(XPVNV))
827#define del_XPVNV(p) my_safefree(p)
932e9ff9 828
d33b2eba
GS		 829#define new_XPVCV() my_safemalloc(sizeof(XPVCV))
830#define del_XPVCV(p) my_safefree(p)
932e9ff9 831
d33b2eba
GS		 832#define new_XPVAV() my_safemalloc(sizeof(XPVAV))
833#define del_XPVAV(p) my_safefree(p)
834
835#define new_XPVHV() my_safemalloc(sizeof(XPVHV))
836#define del_XPVHV(p) my_safefree(p)
8c52afec 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)
8c52afec 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)
889
890#define new_XPVFM() my_safemalloc(sizeof(XPVFM))
891#define del_XPVFM(p) my_safefree(p)
8c52afec 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
916 if (SvTYPE(sv) == mt)
917 return TRUE;
918
a5f75d66
AD		 919 if (mt < SVt_PVIV)
920 (void)SvOOK_off(sv);
921
79072805
LW		 922 switch (SvTYPE(sv)) {
923 case SVt_NULL:
924 pv = 0;
925 cur = 0;
926 len = 0;
927 iv = 0;
928 nv = 0.0;
929 magic = 0;
930 stash = 0;
931 break;
79072805
LW		 932 case SVt_IV:
933 pv = 0;
934 cur = 0;
935 len = 0;
463ee0b2 936 iv = SvIVX(sv);
65202027 937 nv = (NV)SvIVX(sv);
79072805
LW		 938 del_XIV(SvANY(sv));
939 magic = 0;
940 stash = 0;
ed6116ce 941 if (mt == SVt_NV)
463ee0b2 942 mt = SVt_PVNV;
ed6116ce
LW		 943 else if (mt < SVt_PVIV)
944 mt = SVt_PVIV;
79072805
LW		 945 break;
946 case SVt_NV:
947 pv = 0;
948 cur = 0;
949 len = 0;
463ee0b2 950 nv = SvNVX(sv);
1bd302c3 951 iv = I_V(nv);
79072805
LW		 952 magic = 0;
953 stash = 0;
954 del_XNV(SvANY(sv));
955 SvANY(sv) = 0;
ed6116ce 956 if (mt < SVt_PVNV)
79072805
LW		 957 mt = SVt_PVNV;
958 break;
ed6116ce
LW		 959 case SVt_RV:
960 pv = (char*)SvRV(sv);
961 cur = 0;
962 len = 0;
56431972
RB		 963 iv = PTR2IV(pv);
964 nv = PTR2NV(pv);
ed6116ce
LW		 965 del_XRV(SvANY(sv));
966 magic = 0;
967 stash = 0;
968 break;
79072805 969 case SVt_PV:
463ee0b2 970 pv = SvPVX(sv);
79072805
LW		 971 cur = SvCUR(sv);
972 len = SvLEN(sv);
973 iv = 0;
974 nv = 0.0;
975 magic = 0;
976 stash = 0;
977 del_XPV(SvANY(sv));
748a9306
LW		 978 if (mt <= SVt_IV)
979 mt = SVt_PVIV;
980 else if (mt == SVt_NV)
981 mt = SVt_PVNV;
79072805
LW		 982 break;
983 case SVt_PVIV:
463ee0b2 984 pv = SvPVX(sv);
79072805
LW		 985 cur = SvCUR(sv);
986 len = SvLEN(sv);
463ee0b2 987 iv = SvIVX(sv);
79072805
LW		 988 nv = 0.0;
989 magic = 0;
990 stash = 0;
991 del_XPVIV(SvANY(sv));
992 break;
993 case SVt_PVNV:
463ee0b2 994 pv = SvPVX(sv);
79072805
LW		 995 cur = SvCUR(sv);
996 len = SvLEN(sv);
463ee0b2
LW		 997 iv = SvIVX(sv);
998 nv = SvNVX(sv);
79072805
LW		 999 magic = 0;
1000 stash = 0;
1001 del_XPVNV(SvANY(sv));
1002 break;
1003 case SVt_PVMG:
463ee0b2 1004 pv = SvPVX(sv);
79072805
LW		 1005 cur = SvCUR(sv);
1006 len = SvLEN(sv);
463ee0b2
LW		 1007 iv = SvIVX(sv);
1008 nv = SvNVX(sv);
79072805
LW		 1009 magic = SvMAGIC(sv);
1010 stash = SvSTASH(sv);
1011 del_XPVMG(SvANY(sv));
1012 break;
1013 default:
cea2e8a9 1014 Perl_croak(aTHX_ "Can't upgrade that kind of scalar");
79072805
LW		 1015 }
1016
1017 switch (mt) {
1018 case SVt_NULL:
cea2e8a9 1019 Perl_croak(aTHX_ "Can't upgrade to undef");
79072805
LW		 1020 case SVt_IV:
1021 SvANY(sv) = new_XIV();
463ee0b2 1022 SvIVX(sv) = iv;
79072805
LW		 1023 break;
1024 case SVt_NV:
1025 SvANY(sv) = new_XNV();
463ee0b2 1026 SvNVX(sv) = nv;
79072805 1027 break;
ed6116ce
LW		 1028 case SVt_RV:
1029 SvANY(sv) = new_XRV();
1030 SvRV(sv) = (SV*)pv;
ed6116ce 1031 break;
79072805
LW		 1032 case SVt_PV:
1033 SvANY(sv) = new_XPV();
463ee0b2 1034 SvPVX(sv) = pv;
79072805
LW		 1035 SvCUR(sv) = cur;
1036 SvLEN(sv) = len;
1037 break;
1038 case SVt_PVIV:
1039 SvANY(sv) = new_XPVIV();
463ee0b2 1040 SvPVX(sv) = pv;
79072805
LW		 1041 SvCUR(sv) = cur;
1042 SvLEN(sv) = len;
463ee0b2 1043 SvIVX(sv) = iv;
79072805 1044 if (SvNIOK(sv))
a0d0e21e 1045 (void)SvIOK_on(sv);
79072805
LW		 1046 SvNOK_off(sv);
1047 break;
1048 case SVt_PVNV:
1049 SvANY(sv) = new_XPVNV();
463ee0b2 1050 SvPVX(sv) = pv;
79072805
LW		 1051 SvCUR(sv) = cur;
1052 SvLEN(sv) = len;
463ee0b2
LW		 1053 SvIVX(sv) = iv;
1054 SvNVX(sv) = nv;
79072805
LW		 1055 break;
1056 case SVt_PVMG:
1057 SvANY(sv) = new_XPVMG();
463ee0b2 1058 SvPVX(sv) = pv;
79072805
LW		 1059 SvCUR(sv) = cur;
1060 SvLEN(sv) = len;
463ee0b2
LW		 1061 SvIVX(sv) = iv;
1062 SvNVX(sv) = nv;
79072805
LW		 1063 SvMAGIC(sv) = magic;
1064 SvSTASH(sv) = stash;
1065 break;
1066 case SVt_PVLV:
1067 SvANY(sv) = new_XPVLV();
463ee0b2 1068 SvPVX(sv) = pv;
79072805
LW		 1069 SvCUR(sv) = cur;
1070 SvLEN(sv) = len;
463ee0b2
LW		 1071 SvIVX(sv) = iv;
1072 SvNVX(sv) = nv;
79072805
LW		 1073 SvMAGIC(sv) = magic;
1074 SvSTASH(sv) = stash;
1075 LvTARGOFF(sv) = 0;
1076 LvTARGLEN(sv) = 0;
1077 LvTARG(sv) = 0;
1078 LvTYPE(sv) = 0;
1079 break;
1080 case SVt_PVAV:
1081 SvANY(sv) = new_XPVAV();
463ee0b2
LW		 1082 if (pv)
1083 Safefree(pv);
2304df62 1084 SvPVX(sv) = 0;
d1bf51dd 1085 AvMAX(sv) = -1;
93965878 1086 AvFILLp(sv) = -1;
463ee0b2
LW		 1087 SvIVX(sv) = 0;
1088 SvNVX(sv) = 0.0;
1089 SvMAGIC(sv) = magic;
1090 SvSTASH(sv) = stash;
1091 AvALLOC(sv) = 0;
79072805
LW		 1092 AvARYLEN(sv) = 0;
1093 AvFLAGS(sv) = 0;
1094 break;
1095 case SVt_PVHV:
1096 SvANY(sv) = new_XPVHV();
463ee0b2
LW		 1097 if (pv)
1098 Safefree(pv);
1099 SvPVX(sv) = 0;
1100 HvFILL(sv) = 0;
1101 HvMAX(sv) = 0;
1102 HvKEYS(sv) = 0;
1103 SvNVX(sv) = 0.0;
79072805
LW		 1104 SvMAGIC(sv) = magic;
1105 SvSTASH(sv) = stash;
79072805
LW		 1106 HvRITER(sv) = 0;
1107 HvEITER(sv) = 0;
1108 HvPMROOT(sv) = 0;
1109 HvNAME(sv) = 0;
79072805
LW		 1110 break;
1111 case SVt_PVCV:
1112 SvANY(sv) = new_XPVCV();
748a9306 1113 Zero(SvANY(sv), 1, XPVCV);
463ee0b2 1114 SvPVX(sv) = pv;
79072805
LW		 1115 SvCUR(sv) = cur;
1116 SvLEN(sv) = len;
463ee0b2
LW		 1117 SvIVX(sv) = iv;
1118 SvNVX(sv) = nv;
79072805
LW		 1119 SvMAGIC(sv) = magic;
1120 SvSTASH(sv) = stash;
79072805
LW		 1121 break;
1122 case SVt_PVGV:
1123 SvANY(sv) = new_XPVGV();
463ee0b2 1124 SvPVX(sv) = pv;
79072805
LW		 1125 SvCUR(sv) = cur;
1126 SvLEN(sv) = len;
463ee0b2
LW		 1127 SvIVX(sv) = iv;
1128 SvNVX(sv) = nv;
79072805
LW		 1129 SvMAGIC(sv) = magic;
1130 SvSTASH(sv) = stash;
93a17b20 1131 GvGP(sv) = 0;
79072805
LW		 1132 GvNAME(sv) = 0;
1133 GvNAMELEN(sv) = 0;
1134 GvSTASH(sv) = 0;
a5f75d66 1135 GvFLAGS(sv) = 0;
79072805
LW		 1136 break;
1137 case SVt_PVBM:
1138 SvANY(sv) = new_XPVBM();
463ee0b2 1139 SvPVX(sv) = pv;
79072805
LW		 1140 SvCUR(sv) = cur;
1141 SvLEN(sv) = len;
463ee0b2
LW		 1142 SvIVX(sv) = iv;
1143 SvNVX(sv) = nv;
79072805
LW		 1144 SvMAGIC(sv) = magic;
1145 SvSTASH(sv) = stash;
1146 BmRARE(sv) = 0;
1147 BmUSEFUL(sv) = 0;
1148 BmPREVIOUS(sv) = 0;
1149 break;
1150 case SVt_PVFM:
1151 SvANY(sv) = new_XPVFM();
748a9306 1152 Zero(SvANY(sv), 1, XPVFM);
463ee0b2 1153 SvPVX(sv) = pv;
79072805
LW		 1154 SvCUR(sv) = cur;
1155 SvLEN(sv) = len;
463ee0b2
LW		 1156 SvIVX(sv) = iv;
1157 SvNVX(sv) = nv;
79072805
LW		 1158 SvMAGIC(sv) = magic;
1159 SvSTASH(sv) = stash;
79072805 1160 break;
8990e307
LW		 1161 case SVt_PVIO:
1162 SvANY(sv) = new_XPVIO();
748a9306 1163 Zero(SvANY(sv), 1, XPVIO);
8990e307
LW		 1164 SvPVX(sv) = pv;
1165 SvCUR(sv) = cur;
1166 SvLEN(sv) = len;
1167 SvIVX(sv) = iv;
1168 SvNVX(sv) = nv;
1169 SvMAGIC(sv) = magic;
1170 SvSTASH(sv) = stash;
85e6fe83 1171 IoPAGE_LEN(sv) = 60;
8990e307
LW		 1172 break;
1173 }
1174 SvFLAGS(sv) &= ~SVTYPEMASK;
1175 SvFLAGS(sv) |= mt;
79072805
LW		 1176 return TRUE;
1177}
1178
79072805 1179int
864dbfa3 1180Perl_sv_backoff(pTHX_ register SV *sv)
79072805
LW		 1181{
1182 assert(SvOOK(sv));
463ee0b2
LW		 1183 if (SvIVX(sv)) {
1184 char *s = SvPVX(sv);
1185 SvLEN(sv) += SvIVX(sv);
1186 SvPVX(sv) -= SvIVX(sv);
79072805 1187 SvIV_set(sv, 0);
463ee0b2 1188 Move(s, SvPVX(sv), SvCUR(sv)+1, char);
79072805
LW		 1189 }
1190 SvFLAGS(sv) &= ~SVf_OOK;
a0d0e21e 1191 return 0;
79072805
LW		 1192}
1193
954c1994
GS		 1194/*
1195=for apidoc sv_grow
1196
1197Expands the character buffer in the SV. This will use C<sv_unref> and will
1198upgrade the SV to C<SVt_PV>. Returns a pointer to the character buffer.
1199Use C<SvGROW>.
1200
1201=cut
1202*/
1203
79072805 1204char *
864dbfa3 1205Perl_sv_grow(pTHX_ register SV *sv, register STRLEN newlen)
79072805
LW		 1206{
1207 register char *s;
1208
55497cff 1209#ifdef HAS_64K_LIMIT
79072805 1210 if (newlen >= 0x10000) {
1d7c1841
GS		 1211 PerlIO_printf(Perl_debug_log,
1212 "Allocation too large: %"UVxf"\n", (UV)newlen);
79072805
LW		 1213 my_exit(1);
1214 }
55497cff 1215#endif /* HAS_64K_LIMIT */
a0d0e21e
LW		 1216 if (SvROK(sv))
1217 sv_unref(sv);
79072805
LW		 1218 if (SvTYPE(sv) < SVt_PV) {
1219 sv_upgrade(sv, SVt_PV);
463ee0b2 1220 s = SvPVX(sv);
79072805
LW		 1221 }
1222 else if (SvOOK(sv)) { /* pv is offset? */
1223 sv_backoff(sv);
463ee0b2 1224 s = SvPVX(sv);
79072805
LW		 1225 if (newlen > SvLEN(sv))
1226 newlen += 10 * (newlen - SvCUR(sv)); /* avoid copy each time */
c6f8c383
GA		 1227#ifdef HAS_64K_LIMIT
1228 if (newlen >= 0x10000)
1229 newlen = 0xFFFF;
1230#endif
79072805
LW		 1231 }
1232 else
463ee0b2 1233 s = SvPVX(sv);
79072805 1234 if (newlen > SvLEN(sv)) { /* need more room? */
8d6dde3e 1235 if (SvLEN(sv) && s) {
f5a32c7f 1236#if defined(MYMALLOC) && !defined(LEAKTEST)
8d6dde3e
IZ		 1237 STRLEN l = malloced_size((void*)SvPVX(sv));
1238 if (newlen <= l) {
1239 SvLEN_set(sv, l);
1240 return s;
1241 } else
c70c8a0a 1242#endif
79072805 1243 Renew(s,newlen,char);
8d6dde3e 1244 }
79072805
LW		 1245 else
1246 New(703,s,newlen,char);
1247 SvPV_set(sv, s);
1248 SvLEN_set(sv, newlen);
1249 }
1250 return s;
1251}
1252
954c1994
GS		 1253/*
1254=for apidoc sv_setiv
1255
1256Copies an integer into the given SV. Does not handle 'set' magic. See
1257C<sv_setiv_mg>.
1258
1259=cut
1260*/
1261
79072805 1262void
864dbfa3 1263Perl_sv_setiv(pTHX_ register SV *sv, IV i)
79072805 1264{
2213622d 1265 SV_CHECK_THINKFIRST(sv);
463ee0b2
LW		 1266 switch (SvTYPE(sv)) {
1267 case SVt_NULL:
79072805 1268 sv_upgrade(sv, SVt_IV);
463ee0b2
LW		 1269 break;
1270 case SVt_NV:
1271 sv_upgrade(sv, SVt_PVNV);
1272 break;
ed6116ce 1273 case SVt_RV:
463ee0b2 1274 case SVt_PV:
79072805 1275 sv_upgrade(sv, SVt_PVIV);
463ee0b2 1276 break;
a0d0e21e
LW		 1277
1278 case SVt_PVGV:
a0d0e21e
LW		 1279 case SVt_PVAV:
1280 case SVt_PVHV:
1281 case SVt_PVCV:
1282 case SVt_PVFM:
1283 case SVt_PVIO:
11343788
MB		 1284 {
1285 dTHR;
cea2e8a9 1286 Perl_croak(aTHX_ "Can't coerce %s to integer in %s", sv_reftype(sv,0),
22c35a8c 1287 PL_op_desc[PL_op->op_type]);
11343788 1288 }
463ee0b2 1289 }
a0d0e21e 1290 (void)SvIOK_only(sv); /* validate number */
a5f75d66 1291 SvIVX(sv) = i;
463ee0b2 1292 SvTAINT(sv);
79072805
LW		 1293}
1294
954c1994
GS		 1295/*
1296=for apidoc sv_setiv_mg
1297
1298Like C<sv_setiv>, but also handles 'set' magic.
1299
1300=cut
1301*/
1302
79072805 1303void
864dbfa3 1304Perl_sv_setiv_mg(pTHX_ register SV *sv, IV i)
ef50df4b
GS		 1305{
1306 sv_setiv(sv,i);
1307 SvSETMAGIC(sv);
1308}
1309
954c1994
GS		 1310/*
1311=for apidoc sv_setuv
1312
1313Copies an unsigned integer into the given SV. Does not handle 'set' magic.
1314See C<sv_setuv_mg>.
1315
1316=cut
1317*/
1318
ef50df4b 1319void
864dbfa3 1320Perl_sv_setuv(pTHX_ register SV *sv, UV u)
55497cff 1321{
25da4f38
IZ		 1322 sv_setiv(sv, 0);
1323 SvIsUV_on(sv);
1324 SvUVX(sv) = u;
55497cff 1325}
1326
954c1994
GS		 1327/*
1328=for apidoc sv_setuv_mg
1329
1330Like C<sv_setuv>, but also handles 'set' magic.
1331
1332=cut
1333*/
1334
55497cff 1335void
864dbfa3 1336Perl_sv_setuv_mg(pTHX_ register SV *sv, UV u)
ef50df4b
GS		 1337{
1338 sv_setuv(sv,u);
1339 SvSETMAGIC(sv);
1340}
1341
954c1994
GS		 1342/*
1343=for apidoc sv_setnv
1344
1345Copies a double into the given SV. Does not handle 'set' magic. See
1346C<sv_setnv_mg>.
1347
1348=cut
1349*/
1350
ef50df4b 1351void
65202027 1352Perl_sv_setnv(pTHX_ register SV *sv, NV num)
79072805 1353{
2213622d 1354 SV_CHECK_THINKFIRST(sv);
a0d0e21e
LW		 1355 switch (SvTYPE(sv)) {
1356 case SVt_NULL:
1357 case SVt_IV:
79072805 1358 sv_upgrade(sv, SVt_NV);
a0d0e21e 1359 break;
a0d0e21e
LW		 1360 case SVt_RV:
1361 case SVt_PV:
1362 case SVt_PVIV:
79072805 1363 sv_upgrade(sv, SVt_PVNV);
a0d0e21e 1364 break;
827b7e14 1365
a0d0e21e 1366 case SVt_PVGV:
a0d0e21e
LW		 1367 case SVt_PVAV:
1368 case SVt_PVHV:
1369 case SVt_PVCV:
1370 case SVt_PVFM:
1371 case SVt_PVIO:
11343788
MB		 1372 {
1373 dTHR;
cea2e8a9 1374 Perl_croak(aTHX_ "Can't coerce %s to number in %s", sv_reftype(sv,0),
22c35a8c 1375 PL_op_name[PL_op->op_type]);
11343788 1376 }
79072805 1377 }
463ee0b2 1378 SvNVX(sv) = num;
a0d0e21e 1379 (void)SvNOK_only(sv); /* validate number */
463ee0b2 1380 SvTAINT(sv);
79072805
LW		 1381}
1382
954c1994
GS		 1383/*
1384=for apidoc sv_setnv_mg
1385
1386Like C<sv_setnv>, but also handles 'set' magic.
1387
1388=cut
1389*/
1390
ef50df4b 1391void
65202027 1392Perl_sv_setnv_mg(pTHX_ register SV *sv, NV num)
ef50df4b
GS		 1393{
1394 sv_setnv(sv,num);
1395 SvSETMAGIC(sv);
1396}
1397
76e3520e 1398STATIC void
cea2e8a9 1399S_not_a_number(pTHX_ SV *sv)
a0d0e21e 1400{
11343788 1401 dTHR;
a0d0e21e
LW		 1402 char tmpbuf[64];
1403 char *d = tmpbuf;
1404 char *s;
dc28f22b
GA		 1405 char *limit = tmpbuf + sizeof(tmpbuf) - 8;
1406 /* each *s can expand to 4 chars + "...\0",
1407 i.e. need room for 8 chars */
a0d0e21e 1408
dc28f22b 1409 for (s = SvPVX(sv); *s && d < limit; s++) {
bbce6d69 1410 int ch = *s & 0xFF;
1411 if (ch & 128 && !isPRINT_LC(ch)) {
a0d0e21e
LW		 1412 *d++ = 'M';
1413 *d++ = '-';
1414 ch &= 127;
1415 }
bbce6d69 1416 if (ch == '\n') {
1417 *d++ = '\\';
1418 *d++ = 'n';
1419 }
1420 else if (ch == '\r') {
1421 *d++ = '\\';
1422 *d++ = 'r';
1423 }
1424 else if (ch == '\f') {
1425 *d++ = '\\';
1426 *d++ = 'f';
1427 }
1428 else if (ch == '\\') {
1429 *d++ = '\\';
1430 *d++ = '\\';
1431 }
1432 else if (isPRINT_LC(ch))
a0d0e21e
LW		 1433 *d++ = ch;
1434 else {
1435 *d++ = '^';
bbce6d69 1436 *d++ = toCTRL(ch);
a0d0e21e
LW		 1437 }
1438 }
1439 if (*s) {
1440 *d++ = '.';
1441 *d++ = '.';
1442 *d++ = '.';
1443 }
1444 *d = '\0';
1445
533c011a 1446 if (PL_op)
42d38218
MS		 1447 Perl_warner(aTHX_ WARN_NUMERIC,
1448 "Argument \"%s\" isn't numeric in %s", tmpbuf,
1449 PL_op_desc[PL_op->op_type]);
a0d0e21e 1450 else
42d38218
MS		 1451 Perl_warner(aTHX_ WARN_NUMERIC,
1452 "Argument \"%s\" isn't numeric", tmpbuf);
a0d0e21e
LW		 1453}
1454
cf2093f6 1455/* the number can be converted to integer with atol() or atoll() */
25da4f38
IZ		 1456#define IS_NUMBER_TO_INT_BY_ATOL 0x01
1457#define IS_NUMBER_TO_INT_BY_ATOF 0x02 /* atol() may be != atof() */
1458#define IS_NUMBER_NOT_IV 0x04 /* (IV)atof() may be != atof() */
1459#define IS_NUMBER_NEG 0x08 /* not good to cache UV */
300aed98 1460#define IS_NUMBER_INFINITY 0x10 /* this is big */
25da4f38
IZ		 1461
1462/* Actually, ISO C leaves conversion of UV to IV undefined, but
1463 until proven guilty, assume that things are not that bad... */
1464
a0d0e21e 1465IV
864dbfa3 1466Perl_sv_2iv(pTHX_ register SV *sv)
79072805
LW		 1467{
1468 if (!sv)
1469 return 0;
8990e307 1470 if (SvGMAGICAL(sv)) {
463ee0b2
LW		 1471 mg_get(sv);
1472 if (SvIOKp(sv))
1473 return SvIVX(sv);
748a9306 1474 if (SvNOKp(sv)) {
25da4f38 1475 return I_V(SvNVX(sv));
748a9306 1476 }
36477c24 1477 if (SvPOKp(sv) && SvLEN(sv))
1478 return asIV(sv);
3fe9a6f1 1479 if (!SvROK(sv)) {
d008e5eb 1480 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
c6ee37c5 1481 dTHR;
d008e5eb 1482 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 1483 report_uninit();
c6ee37c5 1484 }
36477c24 1485 return 0;
3fe9a6f1 1486 }
463ee0b2 1487 }
ed6116ce 1488 if (SvTHINKFIRST(sv)) {
a0d0e21e 1489 if (SvROK(sv)) {
a0d0e21e
LW		 1490 SV* tmpstr;
1491 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv, numer)))
9e7bc3e8 1492 return SvIV(tmpstr);
56431972 1493 return PTR2IV(SvRV(sv));
a0d0e21e 1494 }
0336b60e
IZ		 1495 if (SvREADONLY(sv) && !SvOK(sv)) {
1496 dTHR;
1497 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 1498 report_uninit();
ed6116ce
LW		 1499 return 0;
1500 }
79072805 1501 }
25da4f38
IZ		 1502 if (SvIOKp(sv)) {
1503 if (SvIsUV(sv)) {
1504 return (IV)(SvUVX(sv));
1505 }
1506 else {
1507 return SvIVX(sv);
1508 }
463ee0b2 1509 }
748a9306 1510 if (SvNOKp(sv)) {
25da4f38
IZ		 1511 /* We can cache the IV/UV value even if it not good enough
1512 * to reconstruct NV, since the conversion to PV will prefer
cf2093f6 1513 * NV over IV/UV.
25da4f38
IZ		 1514 */
1515
1516 if (SvTYPE(sv) == SVt_NV)
1517 sv_upgrade(sv, SVt_PVNV);
1518
a5f75d66 1519 (void)SvIOK_on(sv);
65202027 1520 if (SvNVX(sv) < (NV)IV_MAX + 0.5)
748a9306 1521 SvIVX(sv) = I_V(SvNVX(sv));
25da4f38 1522 else {
ff68c719 1523 SvUVX(sv) = U_V(SvNVX(sv));
25da4f38
IZ		 1524 SvIsUV_on(sv);
1525 ret_iv_max:
cf2093f6 1526 DEBUG_c(PerlIO_printf(Perl_debug_log,
57def98f 1527 "0x%"UVxf" 2iv(%"UVuf" => %"IVdf") (as unsigned)\n",
56431972 1528 PTR2UV(sv),
57def98f
JH		 1529 SvUVX(sv),
1530 SvUVX(sv)));
25da4f38
IZ		 1531 return (IV)SvUVX(sv);
1532 }
748a9306
LW		 1533 }
1534 else if (SvPOKp(sv) && SvLEN(sv)) {
25da4f38
IZ		 1535 I32 numtype = looks_like_number(sv);
1536
1537 /* We want to avoid a possible problem when we cache an IV which
1538 may be later translated to an NV, and the resulting NV is not
1539 the translation of the initial data.
1540
1541 This means that if we cache such an IV, we need to cache the
1542 NV as well. Moreover, we trade speed for space, and do not
1543 cache the NV if not needed.
1544 */
1545 if (numtype & IS_NUMBER_NOT_IV) {
1546 /* May be not an integer. Need to cache NV if we cache IV
1547 * - otherwise future conversion to NV will be wrong. */
65202027 1548 NV d;
25da4f38 1549
097ee67d 1550 d = Atof(SvPVX(sv));
25da4f38
IZ		 1551
1552 if (SvTYPE(sv) < SVt_PVNV)
1553 sv_upgrade(sv, SVt_PVNV);
1554 SvNVX(sv) = d;
1555 (void)SvNOK_on(sv);
1556 (void)SvIOK_on(sv);
65202027 1557#if defined(USE_LONG_DOUBLE)
1d7c1841
GS		 1558 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
1559 PTR2UV(sv), SvNVX(sv)));
65202027 1560#else
1d7c1841
GS		 1561 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%g)\n",
1562 PTR2UV(sv), SvNVX(sv)));
65202027 1563#endif
65202027 1564 if (SvNVX(sv) < (NV)IV_MAX + 0.5)
25da4f38
IZ		 1565 SvIVX(sv) = I_V(SvNVX(sv));
1566 else {
1567 SvUVX(sv) = U_V(SvNVX(sv));
1568 SvIsUV_on(sv);
1569 goto ret_iv_max;
1570 }
1571 }
1572 else if (numtype) {
1573 /* The NV may be reconstructed from IV - safe to cache IV,
1574 which may be calculated by atol(). */
1575 if (SvTYPE(sv) == SVt_PV)
1576 sv_upgrade(sv, SVt_PVIV);
1577 (void)SvIOK_on(sv);
cf2093f6 1578 SvIVX(sv) = Atol(SvPVX(sv));
25da4f38
IZ		 1579 }
1580 else { /* Not a number. Cache 0. */
1581 dTHR;
1582
1583 if (SvTYPE(sv) < SVt_PVIV)
1584 sv_upgrade(sv, SVt_PVIV);
25da4f38 1585 (void)SvIOK_on(sv);
7b9e3c00 1586 SvIVX(sv) = 0;
25da4f38
IZ		 1587 if (ckWARN(WARN_NUMERIC))
1588 not_a_number(sv);
1589 }
93a17b20 1590 }
79072805 1591 else {
11343788 1592 dTHR;
599cee73 1593 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
1d7c1841 1594 report_uninit();
25da4f38
IZ		 1595 if (SvTYPE(sv) < SVt_IV)
1596 /* Typically the caller expects that sv_any is not NULL now. */
1597 sv_upgrade(sv, SVt_IV);
a0d0e21e 1598 return 0;
79072805 1599 }
1d7c1841
GS		 1600 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"IVdf")\n",
1601 PTR2UV(sv),SvIVX(sv)));
25da4f38 1602 return SvIsUV(sv) ? (IV)SvUVX(sv) : SvIVX(sv);
79072805
LW		 1603}
1604
ff68c719 1605UV
864dbfa3 1606Perl_sv_2uv(pTHX_ register SV *sv)
ff68c719 1607{
1608 if (!sv)
1609 return 0;
1610 if (SvGMAGICAL(sv)) {
1611 mg_get(sv);
1612 if (SvIOKp(sv))
1613 return SvUVX(sv);
1614 if (SvNOKp(sv))
1615 return U_V(SvNVX(sv));
36477c24 1616 if (SvPOKp(sv) && SvLEN(sv))
1617 return asUV(sv);
3fe9a6f1 1618 if (!SvROK(sv)) {
d008e5eb 1619 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
c6ee37c5 1620 dTHR;
d008e5eb 1621 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 1622 report_uninit();
c6ee37c5 1623 }
36477c24 1624 return 0;
3fe9a6f1 1625 }
ff68c719 1626 }
1627 if (SvTHINKFIRST(sv)) {
1628 if (SvROK(sv)) {
ff68c719 1629 SV* tmpstr;
1630 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv, numer)))
9e7bc3e8 1631 return SvUV(tmpstr);
56431972 1632 return PTR2UV(SvRV(sv));
ff68c719 1633 }
0336b60e
IZ		 1634 if (SvREADONLY(sv) && !SvOK(sv)) {
1635 dTHR;
1636 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 1637 report_uninit();
ff68c719 1638 return 0;
1639 }
1640 }
25da4f38
IZ		 1641 if (SvIOKp(sv)) {
1642 if (SvIsUV(sv)) {
1643 return SvUVX(sv);
1644 }
1645 else {
1646 return (UV)SvIVX(sv);
1647 }
ff68c719 1648 }
1649 if (SvNOKp(sv)) {
25da4f38
IZ		 1650 /* We can cache the IV/UV value even if it not good enough
1651 * to reconstruct NV, since the conversion to PV will prefer
cf2093f6 1652 * NV over IV/UV.
25da4f38
IZ		 1653 */
1654 if (SvTYPE(sv) == SVt_NV)
1655 sv_upgrade(sv, SVt_PVNV);
ff68c719 1656 (void)SvIOK_on(sv);
25da4f38
IZ		 1657 if (SvNVX(sv) >= -0.5) {
1658 SvIsUV_on(sv);
1659 SvUVX(sv) = U_V(SvNVX(sv));
1660 }
1661 else {
1662 SvIVX(sv) = I_V(SvNVX(sv));
1663 ret_zero:
cf2093f6 1664 DEBUG_c(PerlIO_printf(Perl_debug_log,
07270b1a 1665 "0x%"UVxf" 2uv(%"IVdf" => %"IVdf") (as signed)\n",
57def98f
JH		 1666 PTR2UV(sv),
1667 SvIVX(sv),
1668 (IV)(UV)SvIVX(sv)));
25da4f38
IZ		 1669 return (UV)SvIVX(sv);
1670 }
ff68c719 1671 }
1672 else if (SvPOKp(sv) && SvLEN(sv)) {
25da4f38
IZ		 1673 I32 numtype = looks_like_number(sv);
1674
1675 /* We want to avoid a possible problem when we cache a UV which
1676 may be later translated to an NV, and the resulting NV is not
1677 the translation of the initial data.
1678
1679 This means that if we cache such a UV, we need to cache the
1680 NV as well. Moreover, we trade speed for space, and do not
1681 cache the NV if not needed.
1682 */
1683 if (numtype & IS_NUMBER_NOT_IV) {
1684 /* May be not an integer. Need to cache NV if we cache IV
1685 * - otherwise future conversion to NV will be wrong. */
65202027 1686 NV d;
25da4f38 1687
cf2093f6 1688 d = Atof(SvPVX(sv));
25da4f38
IZ		 1689
1690 if (SvTYPE(sv) < SVt_PVNV)
1691 sv_upgrade(sv, SVt_PVNV);
1692 SvNVX(sv) = d;
1693 (void)SvNOK_on(sv);
1694 (void)SvIOK_on(sv);
65202027 1695#if defined(USE_LONG_DOUBLE)
1d7c1841
GS		 1696 DEBUG_c(PerlIO_printf(Perl_debug_log,
1697 "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
1698 PTR2UV(sv), SvNVX(sv)));
65202027 1699#else
1d7c1841
GS		 1700 DEBUG_c(PerlIO_printf(Perl_debug_log,
1701 "0x%"UVxf" 2nv(%g)\n",
1702 PTR2UV(sv), SvNVX(sv)));
65202027 1703#endif
25da4f38
IZ		 1704 if (SvNVX(sv) < -0.5) {
1705 SvIVX(sv) = I_V(SvNVX(sv));
1706 goto ret_zero;
1707 } else {
1708 SvUVX(sv) = U_V(SvNVX(sv));
1709 SvIsUV_on(sv);
1710 }
1711 }
1712 else if (numtype & IS_NUMBER_NEG) {
1713 /* The NV may be reconstructed from IV - safe to cache IV,
1714 which may be calculated by atol(). */
1715 if (SvTYPE(sv) == SVt_PV)
1716 sv_upgrade(sv, SVt_PVIV);
1717 (void)SvIOK_on(sv);
cf2093f6 1718 SvIVX(sv) = (IV)Atol(SvPVX(sv));
25da4f38
IZ		 1719 }
1720 else if (numtype) { /* Non-negative */
1721 /* The NV may be reconstructed from UV - safe to cache UV,
1722 which may be calculated by strtoul()/atol. */
1723 if (SvTYPE(sv) == SVt_PV)
1724 sv_upgrade(sv, SVt_PVIV);
1725 (void)SvIOK_on(sv);
1726 (void)SvIsUV_on(sv);
1727#ifdef HAS_STRTOUL
cf2093f6 1728 SvUVX(sv) = Strtoul(SvPVX(sv), Null(char**), 10);
25da4f38
IZ		 1729#else /* no atou(), but we know the number fits into IV... */
1730 /* The only problem may be if it is negative... */
cf2093f6 1731 SvUVX(sv) = (UV)Atol(SvPVX(sv));
25da4f38
IZ		 1732#endif
1733 }
1734 else { /* Not a number. Cache 0. */
1735 dTHR;
1736
1737 if (SvTYPE(sv) < SVt_PVIV)
1738 sv_upgrade(sv, SVt_PVIV);
25da4f38
IZ		 1739 (void)SvIOK_on(sv);
1740 (void)SvIsUV_on(sv);
7b9e3c00
GS		 1741 SvUVX(sv) = 0; /* We assume that 0s have the
1742 same bitmap in IV and UV. */
25da4f38
IZ		 1743 if (ckWARN(WARN_NUMERIC))
1744 not_a_number(sv);
1745 }
ff68c719 1746 }
1747 else {
d008e5eb 1748 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
c6ee37c5 1749 dTHR;
d008e5eb 1750 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 1751 report_uninit();
c6ee37c5 1752 }
25da4f38
IZ		 1753 if (SvTYPE(sv) < SVt_IV)
1754 /* Typically the caller expects that sv_any is not NULL now. */
1755 sv_upgrade(sv, SVt_IV);
ff68c719 1756 return 0;
1757 }
25da4f38 1758
1d7c1841
GS		 1759 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"UVuf")\n",
1760 PTR2UV(sv),SvUVX(sv)));
25da4f38 1761 return SvIsUV(sv) ? SvUVX(sv) : (UV)SvIVX(sv);
ff68c719 1762}
1763
65202027 1764NV
864dbfa3 1765Perl_sv_2nv(pTHX_ register SV *sv)
79072805
LW		 1766{
1767 if (!sv)
1768 return 0.0;
8990e307 1769 if (SvGMAGICAL(sv)) {
463ee0b2
LW		 1770 mg_get(sv);
1771 if (SvNOKp(sv))
1772 return SvNVX(sv);
a0d0e21e 1773 if (SvPOKp(sv) && SvLEN(sv)) {
d008e5eb 1774 dTHR;
599cee73 1775 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !looks_like_number(sv))
a0d0e21e 1776 not_a_number(sv);
097ee67d 1777 return Atof(SvPVX(sv));
a0d0e21e 1778 }
25da4f38
IZ		 1779 if (SvIOKp(sv)) {
1780 if (SvIsUV(sv))
65202027 1781 return (NV)SvUVX(sv);
25da4f38 1782 else
65202027 1783 return (NV)SvIVX(sv);
25da4f38 1784 }
16d20bd9 1785 if (!SvROK(sv)) {
d008e5eb 1786 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
c6ee37c5 1787 dTHR;
d008e5eb 1788 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 1789 report_uninit();
c6ee37c5 1790 }
16d20bd9
AD		 1791 return 0;
1792 }
463ee0b2 1793 }
ed6116ce 1794 if (SvTHINKFIRST(sv)) {
a0d0e21e 1795 if (SvROK(sv)) {
a0d0e21e
LW		 1796 SV* tmpstr;
1797 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)))
9e7bc3e8 1798 return SvNV(tmpstr);
56431972 1799 return PTR2NV(SvRV(sv));
a0d0e21e 1800 }
0336b60e 1801 if (SvREADONLY(sv) && !SvOK(sv)) {
d008e5eb 1802 dTHR;
599cee73 1803 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 1804 report_uninit();
ed6116ce
LW		 1805 return 0.0;
1806 }
79072805
LW		 1807 }
1808 if (SvTYPE(sv) < SVt_NV) {
463ee0b2
LW		 1809 if (SvTYPE(sv) == SVt_IV)
1810 sv_upgrade(sv, SVt_PVNV);
1811 else
1812 sv_upgrade(sv, SVt_NV);
572bbb43 1813#if defined(USE_LONG_DOUBLE)
097ee67d
JH		 1814 DEBUG_c({
1815 RESTORE_NUMERIC_STANDARD();
1d7c1841
GS		 1816 PerlIO_printf(Perl_debug_log,
1817 "0x%"UVxf" num(%" PERL_PRIgldbl ")\n",
1818 PTR2UV(sv), SvNVX(sv));
572bbb43
GS		 1819 RESTORE_NUMERIC_LOCAL();
1820 });
65202027 1821#else
572bbb43
GS		 1822 DEBUG_c({
1823 RESTORE_NUMERIC_STANDARD();
1d7c1841
GS		 1824 PerlIO_printf(Perl_debug_log, "0x%"UVxf" num(%g)\n",
1825 PTR2UV(sv), SvNVX(sv));
097ee67d
JH		 1826 RESTORE_NUMERIC_LOCAL();
1827 });
572bbb43 1828#endif
79072805
LW		 1829 }
1830 else if (SvTYPE(sv) < SVt_PVNV)
1831 sv_upgrade(sv, SVt_PVNV);
748a9306
LW		 1832 if (SvIOKp(sv) &&
1833 (!SvPOKp(sv) || !strchr(SvPVX(sv),'.') || !looks_like_number(sv)))
93a17b20 1834 {
65202027 1835 SvNVX(sv) = SvIsUV(sv) ? (NV)SvUVX(sv) : (NV)SvIVX(sv);
93a17b20 1836 }
748a9306 1837 else if (SvPOKp(sv) && SvLEN(sv)) {
d008e5eb 1838 dTHR;
599cee73 1839 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !looks_like_number(sv))
a0d0e21e 1840 not_a_number(sv);
097ee67d 1841 SvNVX(sv) = Atof(SvPVX(sv));
93a17b20 1842 }
79072805 1843 else {
11343788 1844 dTHR;
599cee73 1845 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
1d7c1841 1846 report_uninit();
25da4f38
IZ		 1847 if (SvTYPE(sv) < SVt_NV)
1848 /* Typically the caller expects that sv_any is not NULL now. */
1849 sv_upgrade(sv, SVt_NV);
a0d0e21e 1850 return 0.0;
79072805
LW		 1851 }
1852 SvNOK_on(sv);
572bbb43 1853#if defined(USE_LONG_DOUBLE)
097ee67d
JH		 1854 DEBUG_c({
1855 RESTORE_NUMERIC_STANDARD();
1d7c1841
GS		 1856 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
1857 PTR2UV(sv), SvNVX(sv));
572bbb43
GS		 1858 RESTORE_NUMERIC_LOCAL();
1859 });
65202027 1860#else
572bbb43
GS		 1861 DEBUG_c({
1862 RESTORE_NUMERIC_STANDARD();
1d7c1841
GS		 1863 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 1nv(%g)\n",
1864 PTR2UV(sv), SvNVX(sv));
097ee67d
JH		 1865 RESTORE_NUMERIC_LOCAL();
1866 });
572bbb43 1867#endif
463ee0b2 1868 return SvNVX(sv);
79072805
LW		 1869}
1870
76e3520e 1871STATIC IV
cea2e8a9 1872S_asIV(pTHX_ SV *sv)
36477c24 1873{
1874 I32 numtype = looks_like_number(sv);
65202027 1875 NV d;
36477c24 1876
25da4f38 1877 if (numtype & IS_NUMBER_TO_INT_BY_ATOL)
cf2093f6 1878 return Atol(SvPVX(sv));
d008e5eb
GS		 1879 if (!numtype) {
1880 dTHR;
1881 if (ckWARN(WARN_NUMERIC))
1882 not_a_number(sv);
1883 }
097ee67d 1884 d = Atof(SvPVX(sv));
25da4f38 1885 return I_V(d);
36477c24 1886}
1887
76e3520e 1888STATIC UV
cea2e8a9 1889S_asUV(pTHX_ SV *sv)
36477c24 1890{
1891 I32 numtype = looks_like_number(sv);
1892
84902520 1893#ifdef HAS_STRTOUL
25da4f38 1894 if (numtype & IS_NUMBER_TO_INT_BY_ATOL)
cf2093f6 1895 return Strtoul(SvPVX(sv), Null(char**), 10);
84902520 1896#endif
d008e5eb
GS		 1897 if (!numtype) {
1898 dTHR;
1899 if (ckWARN(WARN_NUMERIC))
1900 not_a_number(sv);
1901 }
097ee67d 1902 return U_V(Atof(SvPVX(sv)));
36477c24 1903}
1904
25da4f38
IZ		 1905/*
1906 * Returns a combination of (advisory only - can get false negatives)
1907 * IS_NUMBER_TO_INT_BY_ATOL, IS_NUMBER_TO_INT_BY_ATOF, IS_NUMBER_NOT_IV,
1908 * IS_NUMBER_NEG
1909 * 0 if does not look like number.
1910 *
1911 * In fact possible values are 0 and
1912 * IS_NUMBER_TO_INT_BY_ATOL 123
1913 * IS_NUMBER_TO_INT_BY_ATOL | IS_NUMBER_NOT_IV 123.1
1914 * IS_NUMBER_TO_INT_BY_ATOF | IS_NUMBER_NOT_IV 123e0
300aed98 1915 * IS_NUMBER_INFINITY
25da4f38
IZ		 1916 * with a possible addition of IS_NUMBER_NEG.
1917 */
1918
954c1994
GS		 1919/*
1920=for apidoc looks_like_number
1921
1922Test if an the content of an SV looks like a number (or is a
1923number).
1924
1925=cut
1926*/
1927
36477c24 1928I32
864dbfa3 1929Perl_looks_like_number(pTHX_ SV *sv)
36477c24 1930{
1931 register char *s;
1932 register char *send;
1933 register char *sbegin;
25da4f38
IZ		 1934 register char *nbegin;
1935 I32 numtype = 0;
300aed98 1936 I32 sawinf = 0;
36477c24 1937 STRLEN len;
1938
1939 if (SvPOK(sv)) {
1940 sbegin = SvPVX(sv);
1941 len = SvCUR(sv);
1942 }
1943 else if (SvPOKp(sv))
1944 sbegin = SvPV(sv, len);
1945 else
1946 return 1;
1947 send = sbegin + len;
1948
1949 s = sbegin;
1950 while (isSPACE(*s))
1951 s++;
25da4f38
IZ		 1952 if (*s == '-') {
1953 s++;
1954 numtype = IS_NUMBER_NEG;
1955 }
1956 else if (*s == '+')
36477c24 1957 s++;
ff0cee69 1958
25da4f38
IZ		 1959 nbegin = s;
1960 /*
097ee67d
JH		 1961 * we return IS_NUMBER_TO_INT_BY_ATOL if the number can be converted
1962 * to _integer_ with atol() and IS_NUMBER_TO_INT_BY_ATOF if you need
1963 * (int)atof().
25da4f38
IZ		 1964 */
1965
300aed98 1966 /* next must be digit or the radix separator or beginning of infinity */
ff0cee69 1967 if (isDIGIT(*s)) {
1968 do {
1969 s++;
1970 } while (isDIGIT(*s));
25da4f38
IZ		 1971
1972 if (s - nbegin >= TYPE_DIGITS(IV)) /* Cannot cache ato[ul]() */
1973 numtype |= IS_NUMBER_TO_INT_BY_ATOF | IS_NUMBER_NOT_IV;
1974 else
1975 numtype |= IS_NUMBER_TO_INT_BY_ATOL;
1976
097ee67d
JH		 1977 if (*s == '.'
1978#ifdef USE_LOCALE_NUMERIC
1979 || IS_NUMERIC_RADIX(*s)
1980#endif
1981 ) {
ff0cee69 1982 s++;
25da4f38 1983 numtype |= IS_NUMBER_NOT_IV;
097ee67d 1984 while (isDIGIT(*s)) /* optional digits after the radix */
ff0cee69 1985 s++;
1986 }
36477c24 1987 }
097ee67d
JH		 1988 else if (*s == '.'
1989#ifdef USE_LOCALE_NUMERIC
1990 || IS_NUMERIC_RADIX(*s)
1991#endif
1992 ) {
ff0cee69 1993 s++;
25da4f38 1994 numtype |= IS_NUMBER_TO_INT_BY_ATOL | IS_NUMBER_NOT_IV;
097ee67d 1995 /* no digits before the radix means we need digits after it */
ff0cee69 1996 if (isDIGIT(*s)) {
1997 do {
1998 s++;
1999 } while (isDIGIT(*s));
2000 }
2001 else
2002 return 0;
2003 }
300aed98
JH		 2004 else if (*s == 'I' || *s == 'i') {
2005 s++; if (*s != 'N' && *s != 'n') return 0;
2006 s++; if (*s != 'F' && *s != 'f') return 0;
2007 s++; if (*s == 'I' || *s == 'i') {
2008 s++; if (*s != 'N' && *s != 'n') return 0;
2009 s++; if (*s != 'I' && *s != 'i') return 0;
2010 s++; if (*s != 'T' && *s != 't') return 0;
2011 s++; if (*s != 'Y' && *s != 'y') return 0;
2012 }
2013 sawinf = 1;
2014 }
ff0cee69 2015 else
2016 return 0;
2017
300aed98
JH		 2018 if (sawinf)
2019 numtype = IS_NUMBER_INFINITY;
2020 else {
2021 /* we can have an optional exponent part */
2022 if (*s == 'e' || *s == 'E') {
2023 numtype &= ~IS_NUMBER_NEG;
2024 numtype |= IS_NUMBER_TO_INT_BY_ATOF | IS_NUMBER_NOT_IV;
36477c24 2025 s++;
300aed98
JH		 2026 if (*s == '+' || *s == '-')
2027 s++;
2028 if (isDIGIT(*s)) {
2029 do {
2030 s++;
2031 } while (isDIGIT(*s));
2032 }
2033 else
2034 return 0;
2035 }
36477c24 2036 }
2037 while (isSPACE(*s))
2038 s++;
2039 if (s >= send)
2040 return numtype;
2041 if (len == 10 && memEQ(sbegin, "0 but true", 10))
25da4f38 2042 return IS_NUMBER_TO_INT_BY_ATOL;
36477c24 2043 return 0;
2044}
2045
79072805 2046char *
864dbfa3 2047Perl_sv_2pv_nolen(pTHX_ register SV *sv)
1fa8b10d
JD		 2048{
2049 STRLEN n_a;
2050 return sv_2pv(sv, &n_a);
2051}
2052
25da4f38 2053/* We assume that buf is at least TYPE_CHARS(UV) long. */
864dbfa3 2054static char *
25da4f38
IZ		 2055uiv_2buf(char *buf, IV iv, UV uv, int is_uv, char **peob)
2056{
25da4f38
IZ		 2057 char *ptr = buf + TYPE_CHARS(UV);
2058 char *ebuf = ptr;
2059 int sign;
25da4f38
IZ		 2060
2061 if (is_uv)
2062 sign = 0;
2063 else if (iv >= 0) {
2064 uv = iv;
2065 sign = 0;
2066 } else {
2067 uv = -iv;
2068 sign = 1;
2069 }
2070 do {
2071 *--ptr = '0' + (uv % 10);
2072 } while (uv /= 10);
2073 if (sign)
2074 *--ptr = '-';
2075 *peob = ebuf;
2076 return ptr;
2077}
2078
1fa8b10d 2079char *
864dbfa3 2080Perl_sv_2pv(pTHX_ register SV *sv, STRLEN *lp)
79072805
LW		 2081{
2082 register char *s;
2083 int olderrno;
46fc3d4c 2084 SV *tsv;
25da4f38
IZ		 2085 char tbuf[64]; /* Must fit sprintf/Gconvert of longest IV/NV */
2086 char *tmpbuf = tbuf;
79072805 2087
463ee0b2
LW		 2088 if (!sv) {
2089 *lp = 0;
2090 return "";
2091 }
8990e307 2092 if (SvGMAGICAL(sv)) {
463ee0b2
LW		 2093 mg_get(sv);
2094 if (SvPOKp(sv)) {
2095 *lp = SvCUR(sv);
2096 return SvPVX(sv);
2097 }
cf2093f6 2098 if (SvIOKp(sv)) {
cf2093f6 2099 if (SvIsUV(sv))
57def98f 2100 (void)sprintf(tmpbuf,"%"UVuf, (UV)SvUVX(sv));
cf2093f6 2101 else
57def98f 2102 (void)sprintf(tmpbuf,"%"IVdf, (IV)SvIVX(sv));
46fc3d4c 2103 tsv = Nullsv;
a0d0e21e 2104 goto tokensave;
463ee0b2
LW		 2105 }
2106 if (SvNOKp(sv)) {
2d4389e4 2107 Gconvert(SvNVX(sv), NV_DIG, 0, tmpbuf);
46fc3d4c 2108 tsv = Nullsv;
a0d0e21e 2109 goto tokensave;
463ee0b2 2110 }
16d20bd9 2111 if (!SvROK(sv)) {
d008e5eb 2112 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
c6ee37c5 2113 dTHR;
d008e5eb 2114 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1d7c1841 2115 report_uninit();
c6ee37c5 2116 }
16d20bd9
AD		 2117 *lp = 0;
2118 return "";
2119 }
463ee0b2 2120 }
ed6116ce
LW		 2121 if (SvTHINKFIRST(sv)) {
2122 if (SvROK(sv)) {
a0d0e21e
LW		 2123 SV* tmpstr;
2124 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,string)))
9e7bc3e8 2125 return SvPV(tmpstr,*lp);
ed6116ce
LW		 2126 sv = (SV*)SvRV(sv);
2127 if (!sv)
2128 s = "NULLREF";
2129 else {
f9277f47
IZ		 2130 MAGIC *mg;
2131
ed6116ce 2132 switch (SvTYPE(sv)) {
f9277f47
IZ		 2133 case SVt_PVMG:
2134 if ( ((SvFLAGS(sv) &
2135 (SVs_OBJECT|SVf_OK|SVs_GMG|SVs_SMG|SVs_RMG))
3149a8e4 2136 == (SVs_OBJECT|SVs_RMG))
57668c4d 2137 && strEQ(s=HvNAME(SvSTASH(sv)), "Regexp")
f9277f47 2138 && (mg = mg_find(sv, 'r'))) {
5c0ca799 2139 dTHR;
2cd61cdb 2140 regexp *re = (regexp *)mg->mg_obj;
1bd3ad17 2141
2cd61cdb 2142 if (!mg->mg_ptr) {
8782bef2
GB		 2143 char *fptr = "msix";
2144 char reflags[6];
2145 char ch;
2146 int left = 0;
2147 int right = 4;
2148 U16 reganch = (re->reganch & PMf_COMPILETIME) >> 12;
2149
155aba94 2150 while((ch = *fptr++)) {
8782bef2
GB		 2151 if(reganch & 1) {
2152 reflags[left++] = ch;
2153 }
2154 else {
2155 reflags[right--] = ch;
2156 }
2157 reganch >>= 1;
2158 }
2159 if(left != 4) {
2160 reflags[left] = '-';
2161 left = 5;
2162 }
2163
2164 mg->mg_len = re->prelen + 4 + left;
2165 New(616, mg->mg_ptr, mg->mg_len + 1 + left, char);
2166 Copy("(?", mg->mg_ptr, 2, char);
2167 Copy(reflags, mg->mg_ptr+2, left, char);
2168 Copy(":", mg->mg_ptr+left+2, 1, char);
2169 Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char);
1bd3ad17
IZ		 2170 mg->mg_ptr[mg->mg_len - 1] = ')';
2171 mg->mg_ptr[mg->mg_len] = 0;
2172 }
3280af22 2173 PL_reginterp_cnt += re->program[0].next_off;
1bd3ad17
IZ		 2174 *lp = mg->mg_len;
2175 return mg->mg_ptr;
f9277f47
IZ		 2176 }
2177 /* Fall through */
ed6116ce
LW		 2178 case SVt_NULL:
2179 case SVt_IV:
2180 case SVt_NV:
2181 case SVt_RV:
2182 case SVt_PV:
2183 case SVt_PVIV:
2184 case SVt_PVNV:
f9277f47 2185 case SVt_PVBM: s = "SCALAR"; break;
ed6116ce
LW		 2186 case SVt_PVLV: s = "LVALUE"; break;
2187 case SVt_PVAV: s = "ARRAY"; break;
2188 case SVt_PVHV: s = "HASH"; break;
2189 case SVt_PVCV: s = "CODE"; break;
2190 case SVt_PVGV: s = "GLOB"; break;
1d2dff63 2191 case SVt_PVFM: s = "FORMAT"; break;
36477c24 2192 case SVt_PVIO: s = "IO"; break;
ed6116ce
LW		 2193 default: s = "UNKNOWN"; break;
2194 }
46fc3d4c 2195 tsv = NEWSV(0,0);
ed6116ce 2196 if (SvOBJECT(sv))
cea2e8a9 2197 Perl_sv_setpvf(aTHX_ tsv, "%s=%s", HvNAME(SvSTASH(sv)), s);
ed6116ce 2198 else
46fc3d4c 2199 sv_setpv(tsv, s);
57def98f 2200 Perl_sv_catpvf(aTHX_ tsv, "(0x%"UVxf")", PTR2UV(sv));
a0d0e21e 2201 goto tokensaveref;
463ee0b2 2202 }
ed6116ce
LW		 2203 *lp = strlen(s);
2204 return s;
79072805 2205 }
0336b60e
IZ		 2206 if (SvREADONLY(sv) && !SvOK(sv)) {
2207 dTHR;
2208 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 2209 report_uninit();
ed6116ce
LW		 2210 *lp = 0;
2211 return "";
79072805 2212 }
79072805 2213 }
25da4f38
IZ		 2214 if (SvNOKp(sv)) { /* See note in sv_2uv() */
2215 /* XXXX 64-bit? IV may have better precision... */
34d861e4
JH		 2216 /* I tried changing this for to be 64-bit-aware and
2217 * the t/op/numconvert.t became very, very, angry.
2218 * --jhi Sep 1999 */
79072805
LW		 2219 if (SvTYPE(sv) < SVt_PVNV)
2220 sv_upgrade(sv, SVt_PVNV);
2221 SvGROW(sv, 28);
463ee0b2 2222 s = SvPVX(sv);
79072805 2223 olderrno = errno; /* some Xenix systems wipe out errno here */
79072805 2224#ifdef apollo
463ee0b2 2225 if (SvNVX(sv) == 0.0)
79072805
LW		 2226 (void)strcpy(s,"0");
2227 else
2228#endif /*apollo*/
bbce6d69 2229 {
2d4389e4 2230 Gconvert(SvNVX(sv), NV_DIG, 0, s);
bbce6d69 2231 }
79072805 2232 errno = olderrno;
a0d0e21e
LW		 2233#ifdef FIXNEGATIVEZERO
2234 if (*s == '-' && s[1] == '0' && !s[2])
2235 strcpy(s,"0");
2236#endif
79072805
LW		 2237 while (*s) s++;
2238#ifdef hcx
2239 if (s[-1] == '.')
46fc3d4c 2240 *--s = '\0';
79072805
LW		 2241#endif
2242 }
748a9306 2243 else if (SvIOKp(sv)) {
25da4f38 2244 U32 isIOK = SvIOK(sv);
0336b60e 2245 U32 isUIOK = SvIsUV(sv);
25da4f38
IZ		 2246 char buf[TYPE_CHARS(UV)];
2247 char *ebuf, *ptr;
2248
79072805
LW		 2249 if (SvTYPE(sv) < SVt_PVIV)
2250 sv_upgrade(sv, SVt_PVIV);
0336b60e 2251 if (isUIOK)
25da4f38 2252 ptr = uiv_2buf(buf, 0, SvUVX(sv), 1, &ebuf);
0336b60e 2253 else
25da4f38 2254 ptr = uiv_2buf(buf, SvIVX(sv), 0, 0, &ebuf);
0336b60e
IZ		 2255 SvGROW(sv, ebuf - ptr + 1); /* inlined from sv_setpvn */
2256 Move(ptr,SvPVX(sv),ebuf - ptr,char);
2257 SvCUR_set(sv, ebuf - ptr);
46fc3d4c 2258 s = SvEND(sv);
0336b60e 2259 *s = '\0';
25da4f38 2260 if (isIOK)
64f14228
GA		 2261 SvIOK_on(sv);
2262 else
2263 SvIOKp_on(sv);
0336b60e
IZ		 2264 if (isUIOK)
2265 SvIsUV_on(sv);
2266 SvPOK_on(sv);
79072805
LW		 2267 }
2268 else {
11343788 2269 dTHR;
0336b60e
IZ		 2270 if (ckWARN(WARN_UNINITIALIZED)
2271 && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
2272 {
1d7c1841 2273 report_uninit();
0336b60e 2274 }
a0d0e21e 2275 *lp = 0;
25da4f38
IZ		 2276 if (SvTYPE(sv) < SVt_PV)
2277 /* Typically the caller expects that sv_any is not NULL now. */
2278 sv_upgrade(sv, SVt_PV);
a0d0e21e 2279 return "";
79072805 2280 }
463ee0b2
LW		 2281 *lp = s - SvPVX(sv);
2282 SvCUR_set(sv, *lp);
79072805 2283 SvPOK_on(sv);
1d7c1841
GS		 2284 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
2285 PTR2UV(sv),SvPVX(sv)));
463ee0b2 2286 return SvPVX(sv);
a0d0e21e
LW		 2287
2288 tokensave:
2289 if (SvROK(sv)) { /* XXX Skip this when sv_pvn_force calls */
2290 /* Sneaky stuff here */
2291
2292 tokensaveref:
46fc3d4c 2293 if (!tsv)
96827780 2294 tsv = newSVpv(tmpbuf, 0);
46fc3d4c 2295 sv_2mortal(tsv);
2296 *lp = SvCUR(tsv);
2297 return SvPVX(tsv);
a0d0e21e
LW		 2298 }
2299 else {
2300 STRLEN len;
46fc3d4c 2301 char *t;
2302
2303 if (tsv) {
2304 sv_2mortal(tsv);
2305 t = SvPVX(tsv);
2306 len = SvCUR(tsv);
2307 }
2308 else {
96827780
MB		 2309 t = tmpbuf;
2310 len = strlen(tmpbuf);
46fc3d4c 2311 }
a0d0e21e 2312#ifdef FIXNEGATIVEZERO
46fc3d4c 2313 if (len == 2 && t[0] == '-' && t[1] == '0') {
2314 t = "0";
2315 len = 1;
2316 }
a0d0e21e
LW		 2317#endif
2318 (void)SvUPGRADE(sv, SVt_PV);
46fc3d4c 2319 *lp = len;
a0d0e21e
LW		 2320 s = SvGROW(sv, len + 1);
2321 SvCUR_set(sv, len);
46fc3d4c 2322 (void)strcpy(s, t);
6bf554b4 2323 SvPOKp_on(sv);
a0d0e21e
LW		 2324 return s;
2325 }
463ee0b2
LW		 2326}
2327
7340a771
GS		 2328char *
2329Perl_sv_2pvbyte_nolen(pTHX_ register SV *sv)
2330{
560a288e
GS		 2331 STRLEN n_a;
2332 return sv_2pvbyte(sv, &n_a);
7340a771
GS		 2333}
2334
2335char *
2336Perl_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp)
2337{
2338 return sv_2pv(sv,lp);
2339}
2340
2341char *
2342Perl_sv_2pvutf8_nolen(pTHX_ register SV *sv)
2343{
560a288e
GS		 2344 STRLEN n_a;
2345 return sv_2pvutf8(sv, &n_a);
7340a771
GS		 2346}
2347
2348char *
2349Perl_sv_2pvutf8(pTHX_ register SV *sv, STRLEN *lp)
2350{
560a288e 2351 sv_utf8_upgrade(sv);
7340a771
GS		 2352 return sv_2pv(sv,lp);
2353}
2354
463ee0b2
LW		 2355/* This function is only called on magical items */
2356bool
864dbfa3 2357Perl_sv_2bool(pTHX_ register SV *sv)
463ee0b2 2358{
8990e307 2359 if (SvGMAGICAL(sv))
463ee0b2
LW		 2360 mg_get(sv);
2361
a0d0e21e
LW		 2362 if (!SvOK(sv))
2363 return 0;
2364 if (SvROK(sv)) {
11343788 2365 dTHR;
a0d0e21e
LW		 2366 SV* tmpsv;
2367 if (SvAMAGIC(sv) && (tmpsv = AMG_CALLun(sv,bool_)))
9e7bc3e8 2368 return SvTRUE(tmpsv);
a0d0e21e
LW		 2369 return SvRV(sv) != 0;
2370 }
463ee0b2 2371 if (SvPOKp(sv)) {
11343788
MB		 2372 register XPV* Xpvtmp;
2373 if ((Xpvtmp = (XPV*)SvANY(sv)) &&
2374 (*Xpvtmp->xpv_pv > '0' ||
2375 Xpvtmp->xpv_cur > 1 ||
2376 (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0')))
463ee0b2
LW		 2377 return 1;
2378 else
2379 return 0;
2380 }
2381 else {
2382 if (SvIOKp(sv))
2383 return SvIVX(sv) != 0;
2384 else {
2385 if (SvNOKp(sv))
2386 return SvNVX(sv) != 0.0;
2387 else
2388 return FALSE;
2389 }
2390 }
79072805
LW		 2391}
2392
560a288e
GS		 2393void
2394Perl_sv_utf8_upgrade(pTHX_ register SV *sv)
2395{
2396 int hicount;
2397 char *c;
2398
2399 if (!sv || !SvPOK(sv) || SvUTF8(sv))
2400 return;
2401
2402 /* This function could be much more efficient if we had a FLAG
2403 * to signal if there are any hibit chars in the string
2404 */
2405 hicount = 0;
2406 for (c = SvPVX(sv); c < SvEND(sv); c++) {
2407 if (*c & 0x80)
2408 hicount++;
2409 }
2410
2411 if (hicount) {
2412 char *src, *dst;
2413 SvGROW(sv, SvCUR(sv) + hicount + 1);
2414
2415 src = SvEND(sv) - 1;
2416 SvCUR_set(sv, SvCUR(sv) + hicount);
2417 dst = SvEND(sv) - 1;
2418
2419 while (src < dst) {
2420 if (*src & 0x80) {
2421 dst--;
2422 uv_to_utf8((U8*)dst, (U8)*src--);
2423 dst--;
2424 }
2425 else {
2426 *dst-- = *src--;
2427 }
2428 }
2429
2430 SvUTF8_on(sv);
2431 }
2432}
2433
2434bool
2435Perl_sv_utf8_downgrade(pTHX_ register SV* sv, bool fail_ok)
2436{
2437 if (SvPOK(sv) && SvUTF8(sv)) {
2438 char *c = SvPVX(sv);
2439 char *first_hi = 0;
2440 /* need to figure out if this is possible at all first */
2441 while (c < SvEND(sv)) {
2442 if (*c & 0x80) {
2443 I32 len;
ce32ed4b 2444 UV uv = utf8_to_uv((U8*)c, &len);
560a288e
GS		 2445 if (uv >= 256) {
2446 if (fail_ok)
2447 return FALSE;
2448 else {
2449 /* XXX might want to make a callback here instead */
9a54186f 2450 Perl_croak(aTHX_ "Big byte");
560a288e
GS		 2451 }
2452 }
2453 if (!first_hi)
2454 first_hi = c;
2455 c += len;
2456 }
2457 else {
2458 c++;
2459 }
2460 }
2461
2462 if (first_hi) {
2463 char *src = first_hi;
2464 char *dst = first_hi;
2465 while (src < SvEND(sv)) {
2466 if (*src & 0x80) {
2467 I32 len;
ce32ed4b 2468 U8 u = (U8)utf8_to_uv((U8*)src, &len);
560a288e
GS		 2469 *dst++ = u;
2470 src += len;
2471 }
2472 else {
2473 *dst++ = *src++;
2474 }
2475 }
2476 SvCUR_set(sv, dst - SvPVX(sv));
2477 }
2478 SvUTF8_off(sv);
2479 }
2480 return TRUE;
2481}
2482
2483void
2484Perl_sv_utf8_encode(pTHX_ register SV *sv)
2485{
2486 sv_utf8_upgrade(sv);
2487 SvUTF8_off(sv);
2488}
2489
2490bool
2491Perl_sv_utf8_decode(pTHX_ register SV *sv)
2492{
2493 if (SvPOK(sv)) {
2494 char *c;
2495 bool has_utf = FALSE;
2496 if (!sv_utf8_downgrade(sv, TRUE))
2497 return FALSE;
2498
2499 /* it is actually just a matter of turning the utf8 flag on, but
2500 * we want to make sure everything inside is valid utf8 first.
2501 */
2502 c = SvPVX(sv);
2503 while (c < SvEND(sv)) {
2504 if (*c & 0x80) {
2505 I32 len;
2506 (void)utf8_to_uv((U8*)c, &len);
2507 if (len == 1) {
2508 /* bad utf8 */
2509 return FALSE;
2510 }
2511 c += len;
2512 has_utf = TRUE;
2513 }
2514 else {
2515 c++;
2516 }
2517 }
2518
2519 if (has_utf)
2520 SvUTF8_on(sv);
2521 }
2522 return TRUE;
2523}
2524
2525
79072805 2526/* Note: sv_setsv() should not be called with a source string that needs
463ee0b2 2527 * to be reused, since it may destroy the source string if it is marked
79072805
LW		 2528 * as temporary.
2529 */
2530
954c1994
GS		 2531/*
2532=for apidoc sv_setsv
2533
2534Copies the contents of the source SV C<ssv> into the destination SV C<dsv>.
2535The source SV may be destroyed if it is mortal. Does not handle 'set'
2536magic. See the macro forms C<SvSetSV>, C<SvSetSV_nosteal> and
2537C<sv_setsv_mg>.
2538
2539=cut
2540*/
2541
79072805 2542void
864dbfa3 2543Perl_sv_setsv(pTHX_ SV *dstr, register SV *sstr)
79072805 2544{
11343788 2545 dTHR;
8990e307
LW		 2546 register U32 sflags;
2547 register int dtype;
2548 register int stype;
463ee0b2 2549
79072805
LW		 2550 if (sstr == dstr)
2551 return;
2213622d 2552 SV_CHECK_THINKFIRST(dstr);
79072805 2553 if (!sstr)
3280af22 2554 sstr = &PL_sv_undef;
8990e307
LW		 2555 stype = SvTYPE(sstr);
2556 dtype = SvTYPE(dstr);
79072805 2557
a0d0e21e 2558 SvAMAGIC_off(dstr);
9e7bc3e8 2559
463ee0b2 2560 /* There's a lot of redundancy below but we're going for speed here */
79072805 2561
8990e307 2562 switch (stype) {
79072805 2563 case SVt_NULL:
aece5585 2564 undef_sstr:
20408e3c
GS		 2565 if (dtype != SVt_PVGV) {
2566 (void)SvOK_off(dstr);
2567 return;
2568 }
2569 break;
463ee0b2 2570 case SVt_IV:
aece5585
GA		 2571 if (SvIOK(sstr)) {
2572 switch (dtype) {
2573 case SVt_NULL:
8990e307 2574 sv_upgrade(dstr, SVt_IV);
aece5585
GA		 2575 break;
2576 case SVt_NV:
8990e307 2577 sv_upgrade(dstr, SVt_PVNV);
aece5585
GA		 2578 break;
2579 case SVt_RV:
2580 case SVt_PV:
a0d0e21e 2581 sv_upgrade(dstr, SVt_PVIV);
aece5585
GA		 2582 break;
2583 }
2584 (void)SvIOK_only(dstr);
2585 SvIVX(dstr) = SvIVX(sstr);
25da4f38
IZ		 2586 if (SvIsUV(sstr))
2587 SvIsUV_on(dstr);
aece5585
GA		 2588 SvTAINT(dstr);
2589 return;
8990e307 2590 }
aece5585
GA		 2591 goto undef_sstr;
2592
463ee0b2 2593 case SVt_NV:
aece5585
GA		 2594 if (SvNOK(sstr)) {
2595 switch (dtype) {
2596 case SVt_NULL:
2597 case SVt_IV:
8990e307 2598 sv_upgrade(dstr, SVt_NV);
aece5585
GA		 2599 break;
2600 case SVt_RV:
2601 case SVt_PV:
2602 case SVt_PVIV:
a0d0e21e 2603 sv_upgrade(dstr, SVt_PVNV);
aece5585
GA		 2604 break;
2605 }
2606 SvNVX(dstr) = SvNVX(sstr);
2607 (void)SvNOK_only(dstr);
2608 SvTAINT(dstr);
2609 return;
8990e307 2610 }
aece5585
GA		 2611 goto undef_sstr;
2612
ed6116ce 2613 case SVt_RV:
8990e307 2614 if (dtype < SVt_RV)
ed6116ce 2615 sv_upgrade(dstr, SVt_RV);
c07a80fd 2616 else if (dtype == SVt_PVGV &&
2617 SvTYPE(SvRV(sstr)) == SVt_PVGV) {
2618 sstr = SvRV(sstr);
a5f75d66 2619 if (sstr == dstr) {
1d7c1841
GS		 2620 if (GvIMPORTED(dstr) != GVf_IMPORTED
2621 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2622 {
a5f75d66 2623 GvIMPORTED_on(dstr);
1d7c1841 2624 }
a5f75d66
AD		 2625 GvMULTI_on(dstr);
2626 return;
2627 }
c07a80fd 2628 goto glob_assign;
2629 }
ed6116ce 2630 break;
463ee0b2 2631 case SVt_PV:
fc36a67e 2632 case SVt_PVFM:
8990e307 2633 if (dtype < SVt_PV)
463ee0b2 2634 sv_upgrade(dstr, SVt_PV);
463ee0b2
LW		 2635 break;
2636 case SVt_PVIV:
8990e307 2637 if (dtype < SVt_PVIV)
463ee0b2 2638 sv_upgrade(dstr, SVt_PVIV);
463ee0b2
LW		 2639 break;
2640 case SVt_PVNV:
8990e307 2641 if (dtype < SVt_PVNV)
463ee0b2 2642 sv_upgrade(dstr, SVt_PVNV);
463ee0b2 2643 break;
4633a7c4
LW		 2644 case SVt_PVAV:
2645 case SVt_PVHV:
2646 case SVt_PVCV:
4633a7c4 2647 case SVt_PVIO:
533c011a 2648 if (PL_op)
cea2e8a9 2649 Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0),
22c35a8c 2650 PL_op_name[PL_op->op_type]);
4633a7c4 2651 else
cea2e8a9 2652 Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0));
4633a7c4
LW		 2653 break;
2654
79072805 2655 case SVt_PVGV:
8990e307 2656 if (dtype <= SVt_PVGV) {
c07a80fd 2657 glob_assign:
a5f75d66 2658 if (dtype != SVt_PVGV) {
a0d0e21e
LW		 2659 char *name = GvNAME(sstr);
2660 STRLEN len = GvNAMELEN(sstr);
463ee0b2 2661 sv_upgrade(dstr, SVt_PVGV);
6662521e 2662 sv_magic(dstr, dstr, '*', Nullch, 0);
85aff577 2663 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
a0d0e21e
LW		 2664 GvNAME(dstr) = savepvn(name, len);
2665 GvNAMELEN(dstr) = len;
2666 SvFAKE_on(dstr); /* can coerce to non-glob */
2667 }
7bac28a0 2668 /* ahem, death to those who redefine active sort subs */
3280af22
NIS		 2669 else if (PL_curstackinfo->si_type == PERLSI_SORT
2670 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
cea2e8a9 2671 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
7bac28a0 2672 GvNAME(dstr));
a0d0e21e 2673 (void)SvOK_off(dstr);
a5f75d66 2674 GvINTRO_off(dstr); /* one-shot flag */
1edc1566 2675 gp_free((GV*)dstr);
79072805 2676 GvGP(dstr) = gp_ref(GvGP(sstr));
8990e307 2677 SvTAINT(dstr);
1d7c1841
GS		 2678 if (GvIMPORTED(dstr) != GVf_IMPORTED
2679 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2680 {
a5f75d66 2681 GvIMPORTED_on(dstr);
1d7c1841 2682 }
a5f75d66 2683 GvMULTI_on(dstr);
79072805
LW		 2684 return;
2685 }
2686 /* FALL THROUGH */
2687
2688 default:
973f89ab
CS		 2689 if (SvGMAGICAL(sstr)) {
2690 mg_get(sstr);
2691 if (SvTYPE(sstr) != stype) {
2692 stype = SvTYPE(sstr);
2693 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
2694 goto glob_assign;
2695 }
2696 }
ded42b9f 2697 if (stype == SVt_PVLV)
6fc92669 2698 (void)SvUPGRADE(dstr, SVt_PVNV);
ded42b9f 2699 else
6fc92669 2700 (void)SvUPGRADE(dstr, stype);
79072805
LW		 2701 }
2702
8990e307
LW		 2703 sflags = SvFLAGS(sstr);
2704
2705 if (sflags & SVf_ROK) {
2706 if (dtype >= SVt_PV) {
2707 if (dtype == SVt_PVGV) {
2708 SV *sref = SvREFCNT_inc(SvRV(sstr));
2709 SV *dref = 0;
a5f75d66 2710 int intro = GvINTRO(dstr);
a0d0e21e
LW		 2711
2712 if (intro) {
2713 GP *gp;
1d7c1841 2714 gp_free((GV*)dstr);
a5f75d66 2715 GvINTRO_off(dstr); /* one-shot flag */
a0d0e21e 2716 Newz(602,gp, 1, GP);
44a8e56a 2717 GvGP(dstr) = gp_ref(gp);
a0d0e21e 2718 GvSV(dstr) = NEWSV(72,0);
1d7c1841 2719 GvLINE(dstr) = CopLINE(PL_curcop);
1edc1566 2720 GvEGV(dstr) = (GV*)dstr;
a0d0e21e 2721 }
a5f75d66 2722 GvMULTI_on(dstr);
8990e307
LW		 2723 switch (SvTYPE(sref)) {
2724 case SVt_PVAV:
a0d0e21e
LW		 2725 if (intro)
2726 SAVESPTR(GvAV(dstr));
2727 else
2728 dref = (SV*)GvAV(dstr);
8990e307 2729 GvAV(dstr) = (AV*)sref;
39bac7f7 2730 if (!GvIMPORTED_AV(dstr)
1d7c1841
GS		 2731 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2732 {
a5f75d66 2733 GvIMPORTED_AV_on(dstr);
1d7c1841 2734 }
8990e307
LW		 2735 break;
2736 case SVt_PVHV:
a0d0e21e
LW		 2737 if (intro)
2738 SAVESPTR(GvHV(dstr));
2739 else
2740 dref = (SV*)GvHV(dstr);
8990e307 2741 GvHV(dstr) = (HV*)sref;
39bac7f7 2742 if (!GvIMPORTED_HV(dstr)
1d7c1841
GS		 2743 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2744 {
a5f75d66 2745 GvIMPORTED_HV_on(dstr);
1d7c1841 2746 }
8990e307
LW		 2747 break;
2748 case SVt_PVCV:
8ebc5c01 2749 if (intro) {
2750 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
2751 SvREFCNT_dec(GvCV(dstr));
2752 GvCV(dstr) = Nullcv;
68dc0745 2753 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3280af22 2754 PL_sub_generation++;
8ebc5c01 2755 }
a0d0e21e 2756 SAVESPTR(GvCV(dstr));
8ebc5c01 2757 }
68dc0745 2758 else
2759 dref = (SV*)GvCV(dstr);
2760 if (GvCV(dstr) != (CV*)sref) {
748a9306 2761 CV* cv = GvCV(dstr);
4633a7c4 2762 if (cv) {
68dc0745 2763 if (!GvCVGEN((GV*)dstr) &&
2764 (CvROOT(cv) || CvXSUB(cv)))
2765 {
fe5e78ed
GS		 2766 SV *const_sv = cv_const_sv(cv);
2767 bool const_changed = TRUE;
2768 if(const_sv)
2769 const_changed = sv_cmp(const_sv,
2770 op_const_sv(CvSTART((CV*)sref),
036b4402 2771 (CV*)sref));
7bac28a0 2772 /* ahem, death to those who redefine
2773 * active sort subs */
3280af22
NIS		 2774 if (PL_curstackinfo->si_type == PERLSI_SORT &&
2775 PL_sortcop == CvSTART(cv))
cea2e8a9 2776 Perl_croak(aTHX_
7bac28a0 2777 "Can't redefine active sort subroutine %s",
2778 GvENAME((GV*)dstr));
036b4402 2779 if ((const_changed && const_sv) || ckWARN(WARN_REDEFINE))
e476b1b5 2780 Perl_warner(aTHX_ WARN_REDEFINE, const_sv ?
fe5e78ed
GS		 2781 "Constant subroutine %s redefined"
2782 : "Subroutine %s redefined",
2f34f9d4 2783 GvENAME((GV*)dstr));
9607fc9c 2784 }
3fe9a6f1 2785 cv_ckproto(cv, (GV*)dstr,
2786 SvPOK(sref) ? SvPVX(sref) : Nullch);
4633a7c4 2787 }
a5f75d66 2788 GvCV(dstr) = (CV*)sref;
7a4c00b4 2789 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
a5f75d66 2790 GvASSUMECV_on(dstr);
3280af22 2791 PL_sub_generation++;
a5f75d66 2792 }
39bac7f7 2793 if (!GvIMPORTED_CV(dstr)
1d7c1841
GS		 2794 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2795 {
a5f75d66 2796 GvIMPORTED_CV_on(dstr);
1d7c1841 2797 }
8990e307 2798 break;
91bba347
LW		 2799 case SVt_PVIO:
2800 if (intro)
2801 SAVESPTR(GvIOp(dstr));
2802 else
2803 dref = (SV*)GvIOp(dstr);
2804 GvIOp(dstr) = (IO*)sref;
2805 break;
8990e307 2806 default:
a0d0e21e
LW		 2807 if (intro)
2808 SAVESPTR(GvSV(dstr));
2809 else
2810 dref = (SV*)GvSV(dstr);
8990e307 2811 GvSV(dstr) = sref;
39bac7f7 2812 if (!GvIMPORTED_SV(dstr)
1d7c1841
GS		 2813 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
2814 {
a5f75d66 2815 GvIMPORTED_SV_on(dstr);
1d7c1841 2816 }
8990e307
LW		 2817 break;
2818 }
2819 if (dref)
2820 SvREFCNT_dec(dref);
a0d0e21e
LW		 2821 if (intro)
2822 SAVEFREESV(sref);
8990e307
LW		 2823 SvTAINT(dstr);
2824 return;
2825 }
a0d0e21e 2826 if (SvPVX(dstr)) {
760ac839 2827 (void)SvOOK_off(dstr); /* backoff */
50483b2c
JD		 2828 if (SvLEN(dstr))
2829 Safefree(SvPVX(dstr));
a0d0e21e
LW		 2830 SvLEN(dstr)=SvCUR(dstr)=0;
2831 }
8990e307 2832 }
a0d0e21e 2833 (void)SvOK_off(dstr);
8990e307 2834 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
ed6116ce 2835 SvROK_on(dstr);
8990e307 2836 if (sflags & SVp_NOK) {
ed6116ce
LW		 2837 SvNOK_on(dstr);
2838 SvNVX(dstr) = SvNVX(sstr);
2839 }
8990e307 2840 if (sflags & SVp_IOK) {
a0d0e21e 2841 (void)SvIOK_on(dstr);
ed6116ce 2842 SvIVX(dstr) = SvIVX(sstr);
2b1c7e3e 2843 if (sflags & SVf_IVisUV)
25da4f38 2844 SvIsUV_on(dstr);
ed6116ce 2845 }
a0d0e21e
LW		 2846 if (SvAMAGIC(sstr)) {
2847 SvAMAGIC_on(dstr);
2848 }
ed6116ce 2849 }
8990e307 2850 else if (sflags & SVp_POK) {
79072805
LW		 2851
2852 /*
2853 * Check to see if we can just swipe the string. If so, it's a
2854 * possible small lose on short strings, but a big win on long ones.
463ee0b2
LW		 2855 * It might even be a win on short strings if SvPVX(dstr)
2856 * has to be allocated and SvPVX(sstr) has to be freed.
79072805
LW		 2857 */
2858
ff68c719 2859 if (SvTEMP(sstr) && /* slated for free anyway? */
01b73108 2860 SvREFCNT(sstr) == 1 && /* and no other references to it? */
a5f75d66
AD		 2861 !(sflags & SVf_OOK)) /* and not involved in OOK hack? */
2862 {
adbc6bb1 2863 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
a5f75d66
AD		 2864 if (SvOOK(dstr)) {
2865 SvFLAGS(dstr) &= ~SVf_OOK;
2866 Safefree(SvPVX(dstr) - SvIVX(dstr));
2867 }
50483b2c 2868 else if (SvLEN(dstr))
a5f75d66 2869 Safefree(SvPVX(dstr));
79072805 2870 }
a5f75d66 2871 (void)SvPOK_only(dstr);
463ee0b2 2872 SvPV_set(dstr, SvPVX(sstr));
79072805
LW		 2873 SvLEN_set(dstr, SvLEN(sstr));
2874 SvCUR_set(dstr, SvCUR(sstr));
f4e86e0f 2875
79072805 2876 SvTEMP_off(dstr);
2b1c7e3e 2877 (void)SvOK_off(sstr); /* NOTE: nukes most SvFLAGS on sstr */
79072805
LW		 2878 SvPV_set(sstr, Nullch);
2879 SvLEN_set(sstr, 0);
a5f75d66
AD		 2880 SvCUR_set(sstr, 0);
2881 SvTEMP_off(sstr);
79072805
LW		 2882 }
2883 else { /* have to copy actual string */
8990e307
LW		 2884 STRLEN len = SvCUR(sstr);
2885
2886 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
2887 Move(SvPVX(sstr),SvPVX(dstr),len,char);
2888 SvCUR_set(dstr, len);
2889 *SvEND(dstr) = '\0';
a0d0e21e 2890 (void)SvPOK_only(dstr);
79072805 2891 }
3aa33fe5 2892 if ((sflags & SVf_UTF8) && !IN_BYTE)
a7cb1f99 2893 SvUTF8_on(dstr);
79072805 2894 /*SUPPRESS 560*/
8990e307 2895 if (sflags & SVp_NOK) {
79072805 2896 SvNOK_on(dstr);
463ee0b2 2897 SvNVX(dstr) = SvNVX(sstr);
79072805 2898 }
8990e307 2899 if (sflags & SVp_IOK) {
a0d0e21e 2900 (void)SvIOK_on(dstr);
463ee0b2 2901 SvIVX(dstr) = SvIVX(sstr);
2b1c7e3e 2902 if (sflags & SVf_IVisUV)
25da4f38 2903 SvIsUV_on(dstr);
79072805
LW		 2904 }
2905 }
8990e307 2906 else if (sflags & SVp_NOK) {
463ee0b2 2907 SvNVX(dstr) = SvNVX(sstr);
a0d0e21e 2908 (void)SvNOK_only(dstr);
2b1c7e3e 2909 if (sflags & SVf_IOK) {
a0d0e21e 2910 (void)SvIOK_on(dstr);
463ee0b2 2911 SvIVX(dstr) = SvIVX(sstr);
25da4f38 2912 /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */
2b1c7e3e 2913 if (sflags & SVf_IVisUV)
25da4f38 2914 SvIsUV_on(dstr);
79072805
LW		 2915 }
2916 }
8990e307 2917 else if (sflags & SVp_IOK) {
a0d0e21e 2918 (void)SvIOK_only(dstr);
463ee0b2 2919 SvIVX(dstr) = SvIVX(sstr);
2b1c7e3e 2920 if (sflags & SVf_IVisUV)
25da4f38 2921 SvIsUV_on(dstr);
79072805
LW		 2922 }
2923 else {
20408e3c 2924 if (dtype == SVt_PVGV) {
e476b1b5
GS		 2925 if (ckWARN(WARN_MISC))
2926 Perl_warner(aTHX_ WARN_MISC, "Undefined value assigned to typeglob");
20408e3c
GS		 2927 }
2928 else
2929 (void)SvOK_off(dstr);
a0d0e21e 2930 }
463ee0b2 2931 SvTAINT(dstr);
79072805
LW		 2932}
2933
954c1994
GS		 2934/*
2935=for apidoc sv_setsv_mg
2936
2937Like C<sv_setsv>, but also handles 'set' magic.
2938
2939=cut
2940*/
2941
79072805 2942void
864dbfa3 2943Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr)
ef50df4b
GS		 2944{
2945 sv_setsv(dstr,sstr);
2946 SvSETMAGIC(dstr);
2947}
2948
954c1994
GS		 2949/*
2950=for apidoc sv_setpvn
2951
2952Copies a string into an SV. The C<len> parameter indicates the number of
2953bytes to be copied. Does not handle 'set' magic. See C<sv_setpvn_mg>.
2954
2955=cut
2956*/
2957
ef50df4b 2958void
864dbfa3 2959Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
79072805 2960{
c6f8c383 2961 register char *dptr;
4561caa4
CS		 2962 assert(len >= 0); /* STRLEN is probably unsigned, so this may
2963 elicit a warning, but it won't hurt. */
2213622d 2964 SV_CHECK_THINKFIRST(sv);
463ee0b2 2965 if (!ptr) {
a0d0e21e 2966 (void)SvOK_off(sv);
463ee0b2
LW		 2967 return;
2968 }
6fc92669 2969 (void)SvUPGRADE(sv, SVt_PV);
c6f8c383 2970
79072805 2971 SvGROW(sv, len + 1);
c6f8c383
GA		 2972 dptr = SvPVX(sv);
2973 Move(ptr,dptr,len,char);
2974 dptr[len] = '\0';
79072805 2975 SvCUR_set(sv, len);
a0d0e21e 2976 (void)SvPOK_only(sv); /* validate pointer */
463ee0b2 2977 SvTAINT(sv);
79072805
LW		 2978}
2979
954c1994
GS		 2980/*
2981=for apidoc sv_setpvn_mg
2982
2983Like C<sv_setpvn>, but also handles 'set' magic.
2984
2985=cut
2986*/
2987
79072805 2988void
864dbfa3 2989Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
ef50df4b
GS		 2990{
2991 sv_setpvn(sv,ptr,len);
2992 SvSETMAGIC(sv);
2993}
2994
954c1994
GS		 2995/*
2996=for apidoc sv_setpv
2997
2998Copies a string into an SV. The string must be null-terminated. Does not
2999handle 'set' magic. See C<sv_setpv_mg>.
3000
3001=cut
3002*/
3003
ef50df4b 3004void
864dbfa3 3005Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr)
79072805
LW		 3006{
3007 register STRLEN len;
3008
2213622d 3009 SV_CHECK_THINKFIRST(sv);
463ee0b2 3010 if (!ptr) {
a0d0e21e 3011 (void)SvOK_off(sv);
463ee0b2
LW		 3012 return;
3013 }
79072805 3014 len = strlen(ptr);
6fc92669 3015 (void)SvUPGRADE(sv, SVt_PV);
c6f8c383 3016
79072805 3017 SvGROW(sv, len + 1);
463ee0b2 3018 Move(ptr,SvPVX(sv),len+1,char);
79072805 3019 SvCUR_set(sv, len);
a0d0e21e 3020 (void)SvPOK_only(sv); /* validate pointer */
463ee0b2
LW		 3021 SvTAINT(sv);
3022}
3023
954c1994
GS		 3024/*
3025=for apidoc sv_setpv_mg
3026
3027Like C<sv_setpv>, but also handles 'set' magic.
3028
3029=cut
3030*/
3031
463ee0b2 3032void
864dbfa3 3033Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
ef50df4b
GS		 3034{
3035 sv_setpv(sv,ptr);
3036 SvSETMAGIC(sv);
3037}
3038
954c1994
GS		 3039/*
3040=for apidoc sv_usepvn
3041
3042Tells an SV to use C<ptr> to find its string value. Normally the string is
3043stored inside the SV but sv_usepvn allows the SV to use an outside string.
3044The C<ptr> should point to memory that was allocated by C<malloc>. The
3045string length, C<len>, must be supplied. This function will realloc the
3046memory pointed to by C<ptr>, so that pointer should not be freed or used by
3047the programmer after giving it to sv_usepvn. Does not handle 'set' magic.
3048See C<sv_usepvn_mg>.
3049
3050=cut
3051*/
3052
ef50df4b 3053void
864dbfa3 3054Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
463ee0b2 3055{
2213622d 3056 SV_CHECK_THINKFIRST(sv);
c6f8c383 3057 (void)SvUPGRADE(sv, SVt_PV);
463ee0b2 3058 if (!ptr) {
a0d0e21e 3059 (void)SvOK_off(sv);
463ee0b2
LW		 3060 return;
3061 }
a0ed51b3 3062 (void)SvOOK_off(sv);
50483b2c 3063 if (SvPVX(sv) && SvLEN(sv))
463ee0b2
LW		 3064 Safefree(SvPVX(sv));
3065 Renew(ptr, len+1, char);
3066 SvPVX(sv) = ptr;
3067 SvCUR_set(sv, len);
3068 SvLEN_set(sv, len+1);
3069 *SvEND(sv) = '\0';
a0d0e21e 3070 (void)SvPOK_only(sv); /* validate pointer */
463ee0b2 3071 SvTAINT(sv);
79072805
LW		 3072}
3073
954c1994
GS		 3074/*
3075=for apidoc sv_usepvn_mg
3076
3077Like C<sv_usepvn>, but also handles 'set' magic.
3078
3079=cut
3080*/
3081
ef50df4b 3082void
864dbfa3 3083Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
ef50df4b 3084{
51c1089b 3085 sv_usepvn(sv,ptr,len);
ef50df4b
GS		 3086 SvSETMAGIC(sv);
3087}
3088
6fc92669 3089void
864dbfa3 3090Perl_sv_force_normal(pTHX_ register SV *sv)
0f15f207 3091{
2213622d
GA		 3092 if (SvREADONLY(sv)) {
3093 dTHR;
3280af22 3094 if (PL_curcop != &PL_compiling)
cea2e8a9 3095 Perl_croak(aTHX_ PL_no_modify);
0f15f207 3096 }
2213622d
GA		 3097 if (SvROK(sv))
3098 sv_unref(sv);
6fc92669
GS		 3099 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
3100 sv_unglob(sv);
0f15f207
MB		 3101}
3102
954c1994
GS		 3103/*
3104=for apidoc sv_chop
3105
3106Efficient removal of characters from the beginning of the string buffer.
3107SvPOK(sv) must be true and the C<ptr> must be a pointer to somewhere inside
3108the string buffer. The C<ptr> becomes the first character of the adjusted
3109string.
3110
3111=cut
3112*/
3113
79072805 3114void
864dbfa3 3115Perl_sv_chop(pTHX_ register SV *sv, register char *ptr) /* like set but assuming ptr is in sv */
8ac85365
NIS		 3116
3117
79072805
LW		 3118{
3119 register STRLEN delta;
3120
a0d0e21e 3121 if (!ptr || !SvPOKp(sv))
79072805 3122 return;
2213622d 3123 SV_CHECK_THINKFIRST(sv);
79072805
LW		 3124 if (SvTYPE(sv) < SVt_PVIV)
3125 sv_upgrade(sv,SVt_PVIV);
3126
3127 if (!SvOOK(sv)) {
50483b2c
JD		 3128 if (!SvLEN(sv)) { /* make copy of shared string */
3129 char *pvx = SvPVX(sv);
3130 STRLEN len = SvCUR(sv);
3131 SvGROW(sv, len + 1);
3132 Move(pvx,SvPVX(sv),len,char);
3133 *SvEND(sv) = '\0';
3134 }
463ee0b2 3135 SvIVX(sv) = 0;
79072805
LW		 3136 SvFLAGS(sv) |= SVf_OOK;
3137 }
25da4f38 3138 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVp_IOK|SVp_NOK|SVf_IVisUV);
463ee0b2 3139 delta = ptr - SvPVX(sv);
79072805
LW		 3140 SvLEN(sv) -= delta;
3141 SvCUR(sv) -= delta;
463ee0b2
LW		 3142 SvPVX(sv) += delta;
3143 SvIVX(sv) += delta;
79072805
LW		 3144}
3145
954c1994
GS		 3146/*
3147=for apidoc sv_catpvn
3148
3149Concatenates the string onto the end of the string which is in the SV. The
3150C<len> indicates number of bytes to copy. Handles 'get' magic, but not
3151'set' magic. See C<sv_catpvn_mg>.
3152
3153=cut
3154*/
3155
79072805 3156void
864dbfa3 3157Perl_sv_catpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
79072805 3158{
463ee0b2 3159 STRLEN tlen;
748a9306 3160 char *junk;
a0d0e21e 3161
748a9306 3162 junk = SvPV_force(sv, tlen);
463ee0b2 3163 SvGROW(sv, tlen + len + 1);
4633a7c4
LW		 3164 if (ptr == junk)
3165 ptr = SvPVX(sv);
463ee0b2 3166 Move(ptr,SvPVX(sv)+tlen,len,char);
79072805
LW		 3167 SvCUR(sv) += len;
3168 *SvEND(sv) = '\0';
d41ff1b8 3169 (void)SvPOK_only_UTF8(sv); /* validate pointer */
463ee0b2 3170 SvTAINT(sv);
79072805
LW		 3171}
3172
954c1994
GS		 3173/*
3174=for apidoc sv_catpvn_mg
3175
3176Like C<sv_catpvn>, but also handles 'set' magic.
3177
3178=cut
3179*/
3180
79072805 3181void
864dbfa3 3182Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
ef50df4b
GS		 3183{
3184 sv_catpvn(sv,ptr,len);
3185 SvSETMAGIC(sv);
3186}
3187
954c1994
GS		 3188/*
3189=for apidoc sv_catsv
3190
3191Concatenates the string from SV C<ssv> onto the end of the string in SV
3192C<dsv>. Handles 'get' magic, but not 'set' magic. See C<sv_catsv_mg>.
3193
3194=cut
3195*/
3196
ef50df4b 3197void
864dbfa3 3198Perl_sv_catsv(pTHX_ SV *dstr, register SV *sstr)
79072805
LW		 3199{
3200 char *s;
463ee0b2 3201 STRLEN len;
79072805
LW		 3202 if (!sstr)
3203 return;
155aba94 3204 if ((s = SvPV(sstr, len))) {
e84ff256 3205 if (DO_UTF8(sstr)) {
560a288e 3206 sv_utf8_upgrade(dstr);
e84ff256 3207 sv_catpvn(dstr,s,len);
560a288e 3208 SvUTF8_on(dstr);
e84ff256
GS		 3209 }
3210 else
3211 sv_catpvn(dstr,s,len);
560a288e 3212 }
79072805
LW		 3213}
3214
954c1994
GS		 3215/*
3216=for apidoc sv_catsv_mg
3217
3218Like C<sv_catsv>, but also handles 'set' magic.
3219
3220=cut
3221*/
3222
79072805 3223void
864dbfa3 3224Perl_sv_catsv_mg(pTHX_ SV *dstr, register SV *sstr)
ef50df4b
GS		 3225{
3226 sv_catsv(dstr,sstr);
3227 SvSETMAGIC(dstr);
3228}
3229
954c1994
GS		 3230/*
3231=for apidoc sv_catpv
3232
3233Concatenates the string onto the end of the string which is in the SV.
3234Handles 'get' magic, but not 'set' magic. See C<sv_catpv_mg>.
3235
3236=cut
3237*/
3238
ef50df4b 3239void
864dbfa3 3240Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr)
79072805
LW		 3241{
3242 register STRLEN len;
463ee0b2 3243 STRLEN tlen;
748a9306 3244 char *junk;
79072805 3245
79072805
LW		 3246 if (!ptr)
3247 return;
748a9306 3248 junk = SvPV_force(sv, tlen);
79072805 3249 len = strlen(ptr);
463ee0b2 3250 SvGROW(sv, tlen + len + 1);
4633a7c4
LW		 3251 if (ptr == junk)
3252 ptr = SvPVX(sv);
463ee0b2 3253 Move(ptr,SvPVX(sv)+tlen,len+1,char);
79072805 3254 SvCUR(sv) += len;
d41ff1b8 3255 (void)SvPOK_only_UTF8(sv); /* validate pointer */
463ee0b2 3256 SvTAINT(sv);
79072805
LW		 3257}
3258
954c1994
GS		 3259/*
3260=for apidoc sv_catpv_mg
3261
3262Like C<sv_catpv>, but also handles 'set' magic.
3263
3264=cut
3265*/
3266
ef50df4b 3267void
864dbfa3 3268Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr)
ef50df4b 3269{
51c1089b 3270 sv_catpv(sv,ptr);
ef50df4b
GS		 3271 SvSETMAGIC(sv);
3272}
3273
79072805 3274SV *
864dbfa3 3275Perl_newSV(pTHX_ STRLEN len)
79072805
LW		 3276{
3277 register SV *sv;
3278
4561caa4 3279 new_SV(sv);
79072805
LW		 3280 if (len) {
3281 sv_upgrade(sv, SVt_PV);
3282 SvGROW(sv, len + 1);
3283 }
3284 return sv;
3285}
3286
1edc1566 3287/* name is assumed to contain an SV* if (name && namelen == HEf_SVKEY) */
3288
954c1994
GS		 3289/*
3290=for apidoc sv_magic
3291
3292Adds magic to an SV.
3293
3294=cut
3295*/
3296
79072805 3297void
864dbfa3 3298Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen)
79072805
LW		 3299{
3300 MAGIC* mg;
3301
0f15f207
MB		 3302 if (SvREADONLY(sv)) {
3303 dTHR;
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 {
11343788 3324 dTHR;
8990e307 3325 mg->mg_obj = SvREFCNT_inc(obj);
85e6fe83
LW		 3326 mg->mg_flags |= MGf_REFCOUNTED;
3327 }
79072805 3328 mg->mg_type = how;
565764a8 3329 mg->mg_len = namlen;
1edc1566 3330 if (name)
3331 if (namlen >= 0)
3332 mg->mg_ptr = savepvn(name, namlen);
c6ee37c5 3333 else if (namlen == HEf_SVKEY)
1edc1566 3334 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
3335
79072805
LW		 3336 switch (how) {
3337 case 0:
22c35a8c 3338 mg->mg_virtual = &PL_vtbl_sv;
79072805 3339 break;
a0d0e21e 3340 case 'A':
22c35a8c 3341 mg->mg_virtual = &PL_vtbl_amagic;
a0d0e21e
LW		 3342 break;
3343 case 'a':
22c35a8c 3344 mg->mg_virtual = &PL_vtbl_amagicelem;
a0d0e21e
LW		 3345 break;
3346 case 'c':
3347 mg->mg_virtual = 0;
3348 break;
79072805 3349 case 'B':
22c35a8c 3350 mg->mg_virtual = &PL_vtbl_bm;
79072805 3351 break;
6cef1e77 3352 case 'D':
22c35a8c 3353 mg->mg_virtual = &PL_vtbl_regdata;
6cef1e77
IZ		 3354 break;
3355 case 'd':
22c35a8c 3356 mg->mg_virtual = &PL_vtbl_regdatum;
6cef1e77 3357 break;
79072805 3358 case 'E':
22c35a8c 3359 mg->mg_virtual = &PL_vtbl_env;
79072805 3360 break;
55497cff 3361 case 'f':
22c35a8c 3362 mg->mg_virtual = &PL_vtbl_fm;
55497cff 3363 break;
79072805 3364 case 'e':
22c35a8c 3365 mg->mg_virtual = &PL_vtbl_envelem;
79072805 3366 break;
93a17b20 3367 case 'g':
22c35a8c 3368 mg->mg_virtual = &PL_vtbl_mglob;
93a17b20 3369 break;
463ee0b2 3370 case 'I':
22c35a8c 3371 mg->mg_virtual = &PL_vtbl_isa;
463ee0b2
LW		 3372 break;
3373 case 'i':
22c35a8c 3374 mg->mg_virtual = &PL_vtbl_isaelem;
463ee0b2 3375 break;
16660edb 3376 case 'k':
22c35a8c 3377 mg->mg_virtual = &PL_vtbl_nkeys;
16660edb 3378 break;
79072805 3379 case 'L':
a0d0e21e 3380 SvRMAGICAL_on(sv);
93a17b20
LW		 3381 mg->mg_virtual = 0;
3382 break;
3383 case 'l':
22c35a8c 3384 mg->mg_virtual = &PL_vtbl_dbline;
79072805 3385 break;
f93b4edd
MB		 3386#ifdef USE_THREADS
3387 case 'm':
22c35a8c 3388 mg->mg_virtual = &PL_vtbl_mutex;
f93b4edd
MB		 3389 break;
3390#endif /* USE_THREADS */
36477c24 3391#ifdef USE_LOCALE_COLLATE
bbce6d69 3392 case 'o':
22c35a8c 3393 mg->mg_virtual = &PL_vtbl_collxfrm;
bbce6d69 3394 break;
36477c24 3395#endif /* USE_LOCALE_COLLATE */
463ee0b2 3396 case 'P':
22c35a8c 3397 mg->mg_virtual = &PL_vtbl_pack;
463ee0b2
LW		 3398 break;
3399 case 'p':
a0d0e21e 3400 case 'q':
22c35a8c 3401 mg->mg_virtual = &PL_vtbl_packelem;
463ee0b2 3402 break;
c277df42 3403 case 'r':
22c35a8c 3404 mg->mg_virtual = &PL_vtbl_regexp;
c277df42 3405 break;
79072805 3406 case 'S':
22c35a8c 3407 mg->mg_virtual = &PL_vtbl_sig;
79072805
LW		 3408 break;
3409 case 's':
22c35a8c 3410 mg->mg_virtual = &PL_vtbl_sigelem;
79072805 3411 break;
463ee0b2 3412 case 't':
22c35a8c 3413 mg->mg_virtual = &PL_vtbl_taint;
565764a8 3414 mg->mg_len = 1;
463ee0b2 3415 break;
79072805 3416 case 'U':
22c35a8c 3417 mg->mg_virtual = &PL_vtbl_uvar;
79072805
LW		 3418 break;
3419 case 'v':
22c35a8c 3420 mg->mg_virtual = &PL_vtbl_vec;
79072805
LW		 3421 break;
3422 case 'x':
22c35a8c 3423 mg->mg_virtual = &PL_vtbl_substr;
79072805 3424 break;
5f05dabc 3425 case 'y':
22c35a8c 3426 mg->mg_virtual = &PL_vtbl_defelem;
5f05dabc 3427 break;
79072805 3428 case '*':
22c35a8c 3429 mg->mg_virtual = &PL_vtbl_glob;
79072805
LW		 3430 break;
3431 case '#':
22c35a8c 3432 mg->mg_virtual = &PL_vtbl_arylen;
79072805 3433 break;
a0d0e21e 3434 case '.':
22c35a8c 3435 mg->mg_virtual = &PL_vtbl_pos;
a0d0e21e 3436 break;
810b8aa5
GS		 3437 case '<':
3438 mg->mg_virtual = &PL_vtbl_backref;
3439 break;
4633a7c4
LW		 3440 case '~': /* Reserved for use by extensions not perl internals. */
3441 /* Useful for attaching extension internal data to perl vars. */
3442 /* Note that multiple extensions may clash if magical scalars */
3443 /* etc holding private data from one are passed to another. */
3444 SvRMAGICAL_on(sv);
a0d0e21e 3445 break;
79072805 3446 default:
cea2e8a9 3447 Perl_croak(aTHX_ "Don't know how to handle magic of type '%c'", how);
463ee0b2 3448 }
8990e307
LW		 3449 mg_magical(sv);
3450 if (SvGMAGICAL(sv))
3451 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
463ee0b2
LW		 3452}
3453
3454int
864dbfa3 3455Perl_sv_unmagic(pTHX_ SV *sv, int type)
463ee0b2
LW		 3456{
3457 MAGIC* mg;
3458 MAGIC** mgp;
91bba347 3459 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
463ee0b2
LW		 3460 return 0;
3461 mgp = &SvMAGIC(sv);
3462 for (mg = *mgp; mg; mg = *mgp) {
3463 if (mg->mg_type == type) {
3464 MGVTBL* vtbl = mg->mg_virtual;
3465 *mgp = mg->mg_moremagic;
1d7c1841 3466 if (vtbl && vtbl->svt_free)
fc0dc3b3 3467 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
463ee0b2 3468 if (mg->mg_ptr && mg->mg_type != 'g')
565764a8 3469 if (mg->mg_len >= 0)
1edc1566 3470 Safefree(mg->mg_ptr);
565764a8 3471 else if (mg->mg_len == HEf_SVKEY)
1edc1566 3472 SvREFCNT_dec((SV*)mg->mg_ptr);
a0d0e21e
LW		 3473 if (mg->mg_flags & MGf_REFCOUNTED)
3474 SvREFCNT_dec(mg->mg_obj);
463ee0b2
LW		 3475 Safefree(mg);
3476 }
3477 else
3478 mgp = &mg->mg_moremagic;
79072805 3479 }
91bba347 3480 if (!SvMAGIC(sv)) {
463ee0b2 3481 SvMAGICAL_off(sv);
8990e307 3482 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
463ee0b2
LW		 3483 }
3484
3485 return 0;
79072805
LW		 3486}
3487
810b8aa5 3488SV *
864dbfa3 3489Perl_sv_rvweaken(pTHX_ SV *sv)
810b8aa5
GS		 3490{
3491 SV *tsv;
3492 if (!SvOK(sv)) /* let undefs pass */
3493 return sv;
3494 if (!SvROK(sv))
cea2e8a9 3495 Perl_croak(aTHX_ "Can't weaken a nonreference");
810b8aa5
GS		 3496 else if (SvWEAKREF(sv)) {
3497 dTHR;
3498 if (ckWARN(WARN_MISC))
cea2e8a9 3499 Perl_warner(aTHX_ WARN_MISC, "Reference is already weak");
810b8aa5
GS		 3500 return sv;
3501 }
3502 tsv = SvRV(sv);
3503 sv_add_backref(tsv, sv);
3504 SvWEAKREF_on(sv);
3505 SvREFCNT_dec(tsv);
3506 return sv;
3507}
3508
3509STATIC void
cea2e8a9 3510S_sv_add_backref(pTHX_ SV *tsv, SV *sv)
810b8aa5
GS		 3511{
3512 AV *av;
3513 MAGIC *mg;
3514 if (SvMAGICAL(tsv) && (mg = mg_find(tsv, '<')))
3515 av = (AV*)mg->mg_obj;
3516 else {
3517 av = newAV();
3518 sv_magic(tsv, (SV*)av, '<', NULL, 0);
3519 SvREFCNT_dec(av); /* for sv_magic */
3520 }
3521 av_push(av,sv);
3522}
3523
3524STATIC void
cea2e8a9 3525S_sv_del_backref(pTHX_ SV *sv)
810b8aa5
GS		 3526{
3527 AV *av;
3528 SV **svp;
3529 I32 i;
3530 SV *tsv = SvRV(sv);
3531 MAGIC *mg;
3532 if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, '<')))
cea2e8a9 3533 Perl_croak(aTHX_ "panic: del_backref");
810b8aa5
GS		 3534 av = (AV *)mg->mg_obj;
3535 svp = AvARRAY(av);
3536 i = AvFILLp(av);
3537 while (i >= 0) {
3538 if (svp[i] == sv) {
3539 svp[i] = &PL_sv_undef; /* XXX */
3540 }
3541 i--;
3542 }
3543}
3544
954c1994
GS		 3545/*
3546=for apidoc sv_insert
3547
3548Inserts a string at the specified offset/length within the SV. Similar to
3549the Perl substr() function.
3550
3551=cut
3552*/
3553
79072805 3554void
864dbfa3 3555Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
79072805
LW		 3556{
3557 register char *big;
3558 register char *mid;
3559 register char *midend;
3560 register char *bigend;
3561 register I32 i;
6ff81951
GS		 3562 STRLEN curlen;
3563
79072805 3564
8990e307 3565 if (!bigstr)
cea2e8a9 3566 Perl_croak(aTHX_ "Can't modify non-existent substring");
6ff81951 3567 SvPV_force(bigstr, curlen);
60fa28ff 3568 (void)SvPOK_only_UTF8(bigstr);
6ff81951
GS		 3569 if (offset + len > curlen) {
3570 SvGROW(bigstr, offset+len+1);
3571 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
3572 SvCUR_set(bigstr, offset+len);
3573 }
79072805 3574
69b47968 3575 SvTAINT(bigstr);
79072805
LW		 3576 i = littlelen - len;
3577 if (i > 0) { /* string might grow */
a0d0e21e 3578 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
79072805
LW		 3579 mid = big + offset + len;
3580 midend = bigend = big + SvCUR(bigstr);
3581 bigend += i;
3582 *bigend = '\0';
3583 while (midend > mid) /* shove everything down */
3584 *--bigend = *--midend;
3585 Move(little,big+offset,littlelen,char);
3586 SvCUR(bigstr) += i;
3587 SvSETMAGIC(bigstr);
3588 return;
3589 }
3590 else if (i == 0) {
463ee0b2 3591 Move(little,SvPVX(bigstr)+offset,len,char);
79072805
LW		 3592 SvSETMAGIC(bigstr);
3593 return;
3594 }
3595
463ee0b2 3596 big = SvPVX(bigstr);
79072805
LW		 3597 mid = big + offset;
3598 midend = mid + len;
3599 bigend = big + SvCUR(bigstr);
3600
3601 if (midend > bigend)
cea2e8a9 3602 Perl_croak(aTHX_ "panic: sv_insert");
79072805
LW		 3603
3604 if (mid - big > bigend - midend) { /* faster to shorten from end */
3605 if (littlelen) {
3606 Move(little, mid, littlelen,char);
3607 mid += littlelen;
3608 }
3609 i = bigend - midend;
3610 if (i > 0) {
3611 Move(midend, mid, i,char);
3612 mid += i;
3613 }
3614 *mid = '\0';
3615 SvCUR_set(bigstr, mid - big);
3616 }
3617 /*SUPPRESS 560*/
155aba94 3618 else if ((i = mid - big)) { /* faster from front */
79072805
LW		 3619 midend -= littlelen;
3620 mid = midend;
3621 sv_chop(bigstr,midend-i);
3622 big += i;
3623 while (i--)
3624 *--midend = *--big;
3625 if (littlelen)
3626 Move(little, mid, littlelen,char);
3627 }
3628 else if (littlelen) {
3629 midend -= littlelen;
3630 sv_chop(bigstr,midend);
3631 Move(little,midend,littlelen,char);
3632 }
3633 else {
3634 sv_chop(bigstr,midend);
3635 }
3636 SvSETMAGIC(bigstr);
3637}
3638
3639/* make sv point to what nstr did */
3640
3641void
864dbfa3 3642Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv)
79072805 3643{
0453d815 3644 dTHR;
79072805 3645 U32 refcnt = SvREFCNT(sv);
2213622d 3646 SV_CHECK_THINKFIRST(sv);
0453d815
PM		 3647 if (SvREFCNT(nsv) != 1 && ckWARN_d(WARN_INTERNAL))
3648 Perl_warner(aTHX_ WARN_INTERNAL, "Reference miscount in sv_replace()");
93a17b20 3649 if (SvMAGICAL(sv)) {
a0d0e21e
LW		 3650 if (SvMAGICAL(nsv))
3651 mg_free(nsv);
3652 else
3653 sv_upgrade(nsv, SVt_PVMG);
93a17b20 3654 SvMAGIC(nsv) = SvMAGIC(sv);
a0d0e21e 3655 SvFLAGS(nsv) |= SvMAGICAL(sv);
93a17b20
LW		 3656 SvMAGICAL_off(sv);
3657 SvMAGIC(sv) = 0;
3658 }
79072805
LW		 3659 SvREFCNT(sv) = 0;
3660 sv_clear(sv);
477f5d66 3661 assert(!SvREFCNT(sv));
79072805
LW		 3662 StructCopy(nsv,sv,SV);
3663 SvREFCNT(sv) = refcnt;
1edc1566 3664 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
463ee0b2 3665 del_SV(nsv);
79072805
LW		 3666}
3667
3668void
864dbfa3 3669Perl_sv_clear(pTHX_ register SV *sv)
79072805 3670{
ec12f114 3671 HV* stash;
79072805
LW		 3672 assert(sv);
3673 assert(SvREFCNT(sv) == 0);
3674
ed6116ce 3675 if (SvOBJECT(sv)) {
e858de61 3676 dTHR;
3280af22 3677 if (PL_defstash) { /* Still have a symbol table? */
4e35701f 3678 djSP;
8ebc5c01 3679 GV* destructor;
837485b6 3680 SV tmpref;
a0d0e21e 3681
837485b6
GS		 3682 Zero(&tmpref, 1, SV);
3683 sv_upgrade(&tmpref, SVt_RV);
3684 SvROK_on(&tmpref);
3685 SvREADONLY_on(&tmpref); /* DESTROY() could be naughty */
3686 SvREFCNT(&tmpref) = 1;
8ebc5c01 3687
4e8e7886
GS		 3688 do {
3689 stash = SvSTASH(sv);
3690 destructor = gv_fetchmethod(SvSTASH(sv), "DESTROY");
3691 if (destructor) {
3692 ENTER;
e788e7d3 3693 PUSHSTACKi(PERLSI_DESTROY);
837485b6 3694 SvRV(&tmpref) = SvREFCNT_inc(sv);
4e8e7886
GS		 3695 EXTEND(SP, 2);
3696 PUSHMARK(SP);
837485b6 3697 PUSHs(&tmpref);
4e8e7886 3698 PUTBACK;
864dbfa3
GS		 3699 call_sv((SV*)GvCV(destructor),
3700 G_DISCARD|G_EVAL|G_KEEPERR);
4e8e7886 3701 SvREFCNT(sv)--;
d3acc0f7 3702 POPSTACK;
3095d977 3703 SPAGAIN;
4e8e7886
GS		 3704 LEAVE;
3705 }
3706 } while (SvOBJECT(sv) && SvSTASH(sv) != stash);
8ebc5c01 3707
837485b6 3708 del_XRV(SvANY(&tmpref));
6f44e0a4
JP		 3709
3710 if (SvREFCNT(sv)) {
3711 if (PL_in_clean_objs)
cea2e8a9 3712 Perl_croak(aTHX_ "DESTROY created new reference to dead object '%s'",
6f44e0a4
JP		 3713 HvNAME(stash));
3714 /* DESTROY gave object new lease on life */
3715 return;
3716 }
a0d0e21e 3717 }
4e8e7886 3718
a0d0e21e 3719 if (SvOBJECT(sv)) {
4e8e7886 3720 SvREFCNT_dec(SvSTASH(sv)); /* possibly of changed persuasion */
a0d0e21e
LW		 3721 SvOBJECT_off(sv); /* Curse the object. */
3722 if (SvTYPE(sv) != SVt_PVIO)
3280af22 3723 --PL_sv_objcount; /* XXX Might want something more general */
a0d0e21e 3724 }
463ee0b2 3725 }
c07a80fd 3726 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
a0d0e21e 3727 mg_free(sv);
ec12f114 3728 stash = NULL;
79072805 3729 switch (SvTYPE(sv)) {
8990e307 3730 case SVt_PVIO:
df0bd2f4
GS		 3731 if (IoIFP(sv) &&
3732 IoIFP(sv) != PerlIO_stdin() &&
5f05dabc 3733 IoIFP(sv) != PerlIO_stdout() &&
3734 IoIFP(sv) != PerlIO_stderr())
93578b34 3735 {
f2b5be74 3736 io_close((IO*)sv, FALSE);
93578b34 3737 }
1d7c1841 3738 if (IoDIRP(sv) && !(IoFLAGS(sv) & IOf_FAKE_DIRP))
1236053a 3739 PerlDir_close(IoDIRP(sv));
1d7c1841 3740 IoDIRP(sv) = (DIR*)NULL;
8990e307
LW		 3741 Safefree(IoTOP_NAME(sv));
3742 Safefree(IoFMT_NAME(sv));
3743 Safefree(IoBOTTOM_NAME(sv));
a0d0e21e 3744 /* FALL THROUGH */
79072805 3745 case SVt_PVBM:
a0d0e21e 3746 goto freescalar;
79072805 3747 case SVt_PVCV:
748a9306 3748