3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 #undef sv_flags /* Convex has this in <signal.h> for sigvec() */
18 =for apidoc AmU||svtype
19 An enum of flags for Perl types. These are found in the file B<sv.h>
20 in the C<svtype> enum. Test these flags with the C<SvTYPE> macro.
22 =for apidoc AmU||SVt_PV
23 Pointer type flag for scalars. See C<svtype>.
25 =for apidoc AmU||SVt_IV
26 Integer type flag for scalars. See C<svtype>.
28 =for apidoc AmU||SVt_NV
29 Double type flag for scalars. See C<svtype>.
31 =for apidoc AmU||SVt_PVMG
32 Type flag for blessed scalars. See C<svtype>.
34 =for apidoc AmU||SVt_PVAV
35 Type flag for arrays. See C<svtype>.
37 =for apidoc AmU||SVt_PVHV
38 Type flag for hashes. See C<svtype>.
40 =for apidoc AmU||SVt_PVCV
41 Type flag for code refs. See C<svtype>.
63 SVt_LAST /* keep last in enum. used to size arrays */
66 /* There is collusion here with sv_clear - sv_clear exits early for SVt_NULL
67 and SVt_IV, so never reaches the clause at the end that uses
68 sv_type_details->body_size to determine whether to call safefree(). Hence
69 body_size can be set no-zero to record the size of PTEs and HEs, without
70 fear of bogus frees. */
72 #define PTE_SVSLOT SVt_LAST
74 #if defined(PERL_IN_HV_C) || defined(PERL_IN_XS_APITEST)
75 #define HE_SVSLOT (SVt_LAST + 1)
77 #define PERL_ARENA_ROOTS_SIZE (SVt_LAST + 2)
79 /* Using C's structural equivalence to help emulate C++ inheritance here... */
81 struct STRUCT_SV { /* struct sv { */
82 void* sv_any; /* pointer to something */
83 U32 sv_refcnt; /* how many references to us */
84 U32 sv_flags; /* what we are */
88 XPVGV* sv_any; /* pointer to something */
89 U32 sv_refcnt; /* how many references to us */
90 U32 sv_flags; /* what we are */
94 XPVCV* sv_any; /* pointer to something */
95 U32 sv_refcnt; /* how many references to us */
96 U32 sv_flags; /* what we are */
100 XPVAV* sv_any; /* pointer to something */
101 U32 sv_refcnt; /* how many references to us */
102 U32 sv_flags; /* what we are */
106 XPVHV* sv_any; /* pointer to something */
107 U32 sv_refcnt; /* how many references to us */
108 U32 sv_flags; /* what we are */
112 XPVIO* sv_any; /* pointer to something */
113 U32 sv_refcnt; /* how many references to us */
114 U32 sv_flags; /* what we are */
118 =head1 SV Manipulation Functions
120 =for apidoc Am|U32|SvREFCNT|SV* sv
121 Returns the value of the object's reference count.
123 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
124 Increments the reference count of the given SV.
126 All of the following SvREFCNT_inc* macros are optimized versions of
127 SvREFCNT_inc, and can be replaced with SvREFCNT_inc.
129 =for apidoc Am|SV*|SvREFCNT_inc_NN|SV* sv
130 Same as SvREFCNT_inc, but can only be used if you know I<sv>
131 is not NULL. Since we don't have to check the NULLness, it's faster
134 =for apidoc Am|SV*|SvREFCNT_inc_void|SV* sv
135 Same as SvREFCNT_inc, but can only be used if you don't need the
136 return value. The macro doesn't need to return a meaningful value.
138 =for apidoc Am|SV*|SvREFCNT_inc_void_NN|SV* sv
139 Same as SvREFCNT_inc, but can only be used if you don't need the return
140 value, and you know that I<sv> is not NULL. The macro doesn't need
141 to return a meaningful value, or check for NULLness, so it's smaller
144 =for apidoc Am|SV*|SvREFCNT_inc_simple|SV* sv
145 Same as SvREFCNT_inc, but can only be used with simple variables, not
146 expressions or pointer dereferences. Since we don't have to store a
147 temporary value, it's faster.
149 =for apidoc Am|SV*|SvREFCNT_inc_simple_NN|SV* sv
150 Same as SvREFCNT_inc_simple, but can only be used if you know I<sv>
151 is not NULL. Since we don't have to check the NULLness, it's faster
154 =for apidoc Am|SV*|SvREFCNT_inc_simple_void|SV* sv
155 Same as SvREFCNT_inc_simple, but can only be used if you don't need the
156 return value. The macro doesn't need to return a meaningful value.
158 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
159 Increments the reference count of the given SV.
161 =for apidoc Am|void|SvREFCNT_dec|SV* sv
162 Decrements the reference count of the given SV.
164 =for apidoc Am|svtype|SvTYPE|SV* sv
165 Returns the type of the SV. See C<svtype>.
167 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
168 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
169 perform the upgrade if necessary. See C<svtype>.
174 #define SvANY(sv) (sv)->sv_any
175 #define SvFLAGS(sv) (sv)->sv_flags
176 #define SvREFCNT(sv) (sv)->sv_refcnt
178 #ifdef USE_5005THREADS
181 # define ATOMIC_INC(count) __ATOMIC_INCREMENT_LONG(&count)
182 # define ATOMIC_DEC_AND_TEST(res,count) res=(1==__ATOMIC_DECREMENT_LONG(&count))
184 # ifdef EMULATE_ATOMIC_REFCOUNTS
185 # define ATOMIC_INC(count) STMT_START { \
186 MUTEX_LOCK(&PL_svref_mutex); \
188 MUTEX_UNLOCK(&PL_svref_mutex); \
190 # define ATOMIC_DEC_AND_TEST(res,count) STMT_START { \
191 MUTEX_LOCK(&PL_svref_mutex); \
192 res = (--count == 0); \
193 MUTEX_UNLOCK(&PL_svref_mutex); \
196 # define ATOMIC_INC(count) atomic_inc(&count)
197 # define ATOMIC_DEC_AND_TEST(res,count) (res = atomic_dec_and_test(&count))
198 # endif /* EMULATE_ATOMIC_REFCOUNTS */
201 # define ATOMIC_INC(count) (++count)
202 # define ATOMIC_DEC_AND_TEST(res, count) (res = (--count == 0))
203 #endif /* USE_5005THREADS */
205 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
206 # define SvREFCNT_inc(sv) \
208 SV * const _sv = (SV*)(sv); \
210 ATOMIC_INC(SvREFCNT(_sv)); \
213 # define SvREFCNT_inc_simple(sv) \
219 # define SvREFCNT_inc_NN(sv) \
221 SV * const _sv = (SV*)(sv); \
225 # define SvREFCNT_inc_void(sv) \
227 SV * const _sv = (SV*)(sv); \
229 (void)(SvREFCNT(_sv)++); \
232 # ifdef USE_5005THREADS
233 # if defined(VMS) && defined(__ALPHA)
234 # define SvREFCNT_inc(sv) \
235 (PL_Sv=(SV*)(sv), (PL_Sv && __ATOMIC_INCREMENT_LONG(&(SvREFCNT(PL_Sv)))), (SV *)PL_Sv)
237 # define SvREFCNT_inc(sv) sv_newref((SV*)sv)
239 # define SvREFCNT_inc_simple(sv) SvREFCNT_inc(sv)
240 # define SvREFCNT_inc_NN(sv) SvREFCNT_inc(sv)
241 # define SvREFCNT_inc_void(sv) SvREFCNT_inc(sv)
243 # define SvREFCNT_inc(sv) \
244 ((PL_Sv=(SV*)(sv)) ? (ATOMIC_INC(SvREFCNT(PL_Sv)), (SV*)PL_Sv) : NULL)
245 # define SvREFCNT_inc_simple(sv) \
246 ((sv) ? (ATOMIC_INC(SvREFCNT(sv)),(SV*)(sv)) : NULL)
247 # define SvREFCNT_inc_NN(sv) \
248 (PL_Sv=(SV*)(sv),ATOMIC_INC(SvREFCNT(PL_Sv)),PL_Sv)
249 # define SvREFCNT_inc_void(sv) \
250 (void)((PL_Sv=(SV*)(sv)) ? ATOMIC_INC(SvREFCNT(PL_Sv)) : 0)
254 /* These guys don't need the curly blocks */
255 #define SvREFCNT_inc_simple_void(sv) if (sv) (SvREFCNT(sv)++);
256 #define SvREFCNT_inc_simple_NN(sv) (++(SvREFCNT(sv)),(SV*)(sv))
257 #define SvREFCNT_inc_void_NN(sv) (void)(++SvREFCNT((SV*)(sv)))
258 #define SvREFCNT_inc_simple_void_NN(sv) (void)(++SvREFCNT((SV*)(sv)))
260 #define SvREFCNT_dec(sv) sv_free((SV*)(sv))
262 #define SVTYPEMASK 0xff
263 #define SvTYPE(sv) ((svtype)((sv)->sv_flags & SVTYPEMASK))
265 /* Sadly there are some parts of the core that have pointers to already-freed
266 SV heads, and rely on being able to tell that they are now free. So mark
267 them all by using a consistent macro. */
268 #define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
270 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= mt || sv_upgrade(sv, mt))
272 #define SVs_PADBUSY 0x00000100 /* reserved for tmp or my already */
273 #define SVs_PADTMP 0x00000200 /* in use as tmp */
274 #define SVs_PADMY 0x00000400 /* in use a "my" variable */
275 #define SVs_TEMP 0x00000800 /* string is stealable? */
276 #define SVs_OBJECT 0x00001000 /* is "blessed" */
277 #define SVs_GMG 0x00002000 /* has magical get method */
278 #define SVs_SMG 0x00004000 /* has magical set method */
279 #define SVs_RMG 0x00008000 /* has random magical methods */
281 #define SVf_IOK 0x00010000 /* has valid public integer value */
282 #define SVf_NOK 0x00020000 /* has valid public numeric value */
283 #define SVf_POK 0x00040000 /* has valid public pointer value */
284 #define SVf_ROK 0x00080000 /* has a valid reference pointer */
286 #define SVf_FAKE 0x00100000 /* 0: glob or lexical is just a copy
287 1: SV head arena wasn't malloc()ed
288 2: in conjunction with SVf_READONLY
289 marks a shared hash key scalar
290 (SvLEN == 0) or a copy on write
291 string (SvLEN != 0) [SvIsCOW(sv)]
292 3: For PVCV, whether CvUNIQUE(cv)
293 refers to an eval or once only
294 [CvEVAL(cv), CvSPECIAL(cv)]
295 4: Whether the regexp pointer is in
296 fact an offset [SvREPADTMP(sv)]
297 5: On a pad name SV, that slot in the
298 frame AV is a REFCNT'ed reference
299 to a lexical from "outside". */
300 #define SVf_OOK 0x00200000 /* has valid offset value */
301 #define SVf_BREAK 0x00400000 /* refcnt is artificially low - used by
302 SV's in final arena cleanup */
303 #define SVf_READONLY 0x00800000 /* may not be modified */
306 #define SVp_IOK 0x01000000 /* has valid non-public integer value */
307 #define SVp_NOK 0x02000000 /* has valid non-public numeric value */
308 #define SVp_POK 0x04000000 /* has valid non-public pointer value */
309 #define SVp_SCREAM 0x08000000 /* has been studied? */
310 #define SVphv_CLONEABLE 0x08000000 /* PVHV (stashes) clone its objects */
313 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
315 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
316 SVp_IOK|SVp_NOK|SVp_POK)
318 #define PRIVSHIFT 8 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
320 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
321 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded
322 This is also set on RVs whose overloaded
323 stringification is UTF-8. This might
324 only happen as a side effect of SvPV() */
326 /* Ensure this value does not clash with the GV_ADD* flags in gv.h */
328 /* Some private flags. */
331 #define SVphv_REHASH 0x10000000 /* PVHV is recalculating hash values */
333 #define SVphv_SHAREKEYS 0x20000000 /* PVHV keys live on shared string table */
334 /* PVNV, PVMG, PVGV, presumably only inside pads */
335 #define SVpad_TYPED 0x40000000 /* Typed Lexical */
337 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
339 #define SVpbm_TAIL 0x40000000
341 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
343 /* PVNV, PVMG, PVGV, presumably only inside pads */
344 #define SVpad_OUR 0x80000000 /* pad name is "our" instead of "my" */
345 /* IV, PVIV, PVNV, PVMG, PVGV and (I assume) PVLV */
346 /* Presumably IVs aren't stored in pads */
347 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
349 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
351 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
353 #define SVpbm_VALID 0x80000000
354 /* RV upwards. However, SVf_ROK and SVp_IOK are exclusive */
355 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
358 IV xiv_iv; /* integer value or pv offset */
362 NV xnv_nv; /* numeric value, if any */
366 SV * xrv_rv; /* pointer to another SV */
370 char * xpv_pv; /* pointer to malloced string */
371 STRLEN xpv_cur; /* length of xpv_pv as a C string */
372 STRLEN xpv_len; /* allocated size */
375 typedef struct xpv xpv_allocated;
378 char * xpv_pv; /* pointer to malloced string */
379 STRLEN xpv_cur; /* length of xpv_pv as a C string */
380 STRLEN xpv_len; /* allocated size */
381 IV xiv_iv; /* integer value or pv offset */
384 typedef struct xpviv xpviv_allocated;
387 char * xpv_pv; /* pointer to malloced string */
388 STRLEN xpv_cur; /* length of xpv_pv as a C string */
389 STRLEN xpv_len; /* allocated size */
390 UV xuv_uv; /* unsigned value or pv offset */
394 char * xpv_pv; /* pointer to malloced string */
395 STRLEN xpv_cur; /* length of xpv_pv as a C string */
396 STRLEN xpv_len; /* allocated size */
397 IV xiv_iv; /* integer value or pv offset */
398 NV xnv_nv; /* numeric value, if any */
401 /* These structure must match the beginning of struct xpvhv in hv.h. */
403 char * xpv_pv; /* pointer to malloced string */
404 STRLEN xpv_cur; /* length of xpv_pv as a C string */
405 STRLEN xpv_len; /* allocated size */
406 IV xiv_iv; /* integer value or pv offset */
407 NV xnv_nv; /* numeric value, if any */
408 MAGIC* xmg_magic; /* linked list of magicalness */
409 HV* xmg_stash; /* class package */
413 char * xpv_pv; /* pointer to malloced string */
414 STRLEN xpv_cur; /* length of xpv_pv as a C string */
415 STRLEN xpv_len; /* allocated size */
416 IV xiv_iv; /* integer value or pv offset */
417 NV xnv_nv; /* numeric value, if any */
418 MAGIC* xmg_magic; /* linked list of magicalness */
419 HV* xmg_stash; /* class package */
424 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
425 * y=alem/helem/iter t=tie T=tied HE */
429 char * xpv_pv; /* pointer to malloced string */
430 STRLEN xpv_cur; /* length of xpv_pv as a C string */
431 STRLEN xpv_len; /* allocated size */
432 IV xiv_iv; /* integer value or pv offset */
433 NV xnv_nv; /* numeric value, if any */
434 MAGIC* xmg_magic; /* linked list of magicalness */
435 HV* xmg_stash; /* class package */
445 char * xpv_pv; /* pointer to malloced string */
446 STRLEN xpv_cur; /* length of xpv_pv as a C string */
447 STRLEN xpv_len; /* allocated size */
448 IV xiv_iv; /* integer value or pv offset */
449 NV xnv_nv; /* numeric value, if any */
450 MAGIC* xmg_magic; /* linked list of magicalness */
451 HV* xmg_stash; /* class package */
453 I32 xbm_useful; /* is this constant pattern being useful? */
454 U16 xbm_previous; /* how many characters in string before rare? */
455 U8 xbm_rare; /* rarest character in string */
458 /* This structure must match XPVCV in cv.h */
460 typedef U16 cv_flags_t;
463 char * xpv_pv; /* pointer to malloced string */
464 STRLEN xpv_cur; /* length of xpv_pv as a C string */
465 STRLEN xpv_len; /* allocated size */
466 IV xiv_iv; /* integer value or pv offset */
467 NV xnv_nv; /* numeric value, if any */
468 MAGIC* xmg_magic; /* linked list of magicalness */
469 HV* xmg_stash; /* class package */
474 void (*xcv_xsub)(pTHX_ CV*);
478 long xcv_depth; /* >= 2 indicates recursive call */
481 #ifdef USE_5005THREADS
482 perl_mutex *xcv_mutexp; /* protects xcv_owner */
483 struct perl_thread *xcv_owner; /* current owner thread */
484 #endif /* USE_5005THREADS */
485 cv_flags_t xcv_flags;
486 U32 xcv_outside_seq; /* the COP sequence (at the point of our
487 * compilation) in the lexically enclosing
493 char * xpv_pv; /* pointer to malloced string */
494 STRLEN xpv_cur; /* length of xpv_pv as a C string */
495 STRLEN xpv_len; /* allocated size */
496 IV xiv_iv; /* integer value or pv offset */
497 NV xnv_nv; /* numeric value, if any */
498 MAGIC* xmg_magic; /* linked list of magicalness */
499 HV* xmg_stash; /* class package */
501 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
502 PerlIO * xio_ofp; /* but sockets need separate streams */
503 /* Cray addresses everything by word boundaries (64 bits) and
504 * code and data pointers cannot be mixed (which is exactly what
505 * Perl_filter_add() tries to do with the dirp), hence the following
506 * union trick (as suggested by Gurusamy Sarathy).
507 * For further information see Geir Johansen's problem report titled
508 [ID 20000612.002] Perl problem on Cray system
509 * The any pointer (known as IoANY()) will also be a good place
510 * to hang any IO disciplines to.
513 DIR * xiou_dirp; /* for opendir, readdir, etc */
514 void * xiou_any; /* for alignment */
516 IV xio_lines; /* $. */
517 IV xio_page; /* $% */
518 IV xio_page_len; /* $= */
519 IV xio_lines_left; /* $- */
520 char * xio_top_name; /* $^ */
521 GV * xio_top_gv; /* $^ */
522 char * xio_fmt_name; /* $~ */
523 GV * xio_fmt_gv; /* $~ */
524 char * xio_bottom_name;/* $^B */
525 GV * xio_bottom_gv; /* $^B */
526 short xio_subprocess; /* -| or |- */
530 #define xio_dirp xio_dirpu.xiou_dirp
531 #define xio_any xio_dirpu.xiou_any
533 #define IOf_ARGV 1 /* this fp iterates over ARGV */
534 #define IOf_START 2 /* check for null ARGV and substitute '-' */
535 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
536 #define IOf_DIDTOP 8 /* just did top of form */
537 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
538 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
539 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
541 /* The following macros define implementation-independent predicates on SVs. */
544 =for apidoc Am|bool|SvNIOK|SV* sv
545 Returns a boolean indicating whether the SV contains a number, integer or
548 =for apidoc Am|bool|SvNIOKp|SV* sv
549 Returns a boolean indicating whether the SV contains a number, integer or
550 double. Checks the B<private> setting. Use C<SvNIOK>.
552 =for apidoc Am|void|SvNIOK_off|SV* sv
553 Unsets the NV/IV status of an SV.
555 =for apidoc Am|bool|SvOK|SV* sv
556 Returns a boolean indicating whether the value is an SV. It also tells
557 whether the value is defined or not.
559 =for apidoc Am|bool|SvIOKp|SV* sv
560 Returns a boolean indicating whether the SV contains an integer. Checks
561 the B<private> setting. Use C<SvIOK>.
563 =for apidoc Am|bool|SvNOKp|SV* sv
564 Returns a boolean indicating whether the SV contains a double. Checks the
565 B<private> setting. Use C<SvNOK>.
567 =for apidoc Am|bool|SvPOKp|SV* sv
568 Returns a boolean indicating whether the SV contains a character string.
569 Checks the B<private> setting. Use C<SvPOK>.
571 =for apidoc Am|bool|SvIOK|SV* sv
572 Returns a boolean indicating whether the SV contains an integer.
574 =for apidoc Am|void|SvIOK_on|SV* sv
575 Tells an SV that it is an integer.
577 =for apidoc Am|void|SvIOK_off|SV* sv
578 Unsets the IV status of an SV.
580 =for apidoc Am|void|SvIOK_only|SV* sv
581 Tells an SV that it is an integer and disables all other OK bits.
583 =for apidoc Am|void|SvIOK_only_UV|SV* sv
584 Tells and SV that it is an unsigned integer and disables all other OK bits.
586 =for apidoc Am|bool|SvIOK_UV|SV* sv
587 Returns a boolean indicating whether the SV contains an unsigned integer.
589 =for apidoc Am|void|SvUOK|SV* sv
590 Returns a boolean indicating whether the SV contains an unsigned integer.
592 =for apidoc Am|bool|SvIOK_notUV|SV* sv
593 Returns a boolean indicating whether the SV contains a signed integer.
595 =for apidoc Am|bool|SvNOK|SV* sv
596 Returns a boolean indicating whether the SV contains a double.
598 =for apidoc Am|void|SvNOK_on|SV* sv
599 Tells an SV that it is a double.
601 =for apidoc Am|void|SvNOK_off|SV* sv
602 Unsets the NV status of an SV.
604 =for apidoc Am|void|SvNOK_only|SV* sv
605 Tells an SV that it is a double and disables all other OK bits.
607 =for apidoc Am|bool|SvPOK|SV* sv
608 Returns a boolean indicating whether the SV contains a character
611 =for apidoc Am|void|SvPOK_on|SV* sv
612 Tells an SV that it is a string.
614 =for apidoc Am|void|SvPOK_off|SV* sv
615 Unsets the PV status of an SV.
617 =for apidoc Am|void|SvPOK_only|SV* sv
618 Tells an SV that it is a string and disables all other OK bits.
619 Will also turn off the UTF-8 status.
621 =for apidoc Am|bool|SvOOK|SV* sv
622 Returns a boolean indicating whether the SvIVX is a valid offset value for
623 the SvPVX. This hack is used internally to speed up removal of characters
624 from the beginning of a SvPV. When SvOOK is true, then the start of the
625 allocated string buffer is really (SvPVX - SvIVX).
627 =for apidoc Am|bool|SvROK|SV* sv
628 Tests if the SV is an RV.
630 =for apidoc Am|void|SvROK_on|SV* sv
631 Tells an SV that it is an RV.
633 =for apidoc Am|void|SvROK_off|SV* sv
634 Unsets the RV status of an SV.
636 =for apidoc Am|SV*|SvRV|SV* sv
637 Dereferences an RV to return the SV.
639 =for apidoc Am|IV|SvIVX|SV* sv
640 Returns the raw value in the SV's IV slot, without checks or conversions.
641 Only use when you are sure SvIOK is true. See also C<SvIV()>.
643 =for apidoc Am|UV|SvUVX|SV* sv
644 Returns the raw value in the SV's UV slot, without checks or conversions.
645 Only use when you are sure SvIOK is true. See also C<SvUV()>.
647 =for apidoc Am|NV|SvNVX|SV* sv
648 Returns the raw value in the SV's NV slot, without checks or conversions.
649 Only use when you are sure SvNOK is true. See also C<SvNV()>.
651 =for apidoc Am|char*|SvPVX|SV* sv
652 Returns a pointer to the physical string in the SV. The SV must contain a
655 =for apidoc Am|STRLEN|SvCUR|SV* sv
656 Returns the length of the string which is in the SV. See C<SvLEN>.
658 =for apidoc Am|STRLEN|SvLEN|SV* sv
659 Returns the size of the string buffer in the SV, not including any part
660 attributable to C<SvOOK>. See C<SvCUR>.
662 =for apidoc Am|char*|SvEND|SV* sv
663 Returns a pointer to the last character in the string which is in the SV.
664 See C<SvCUR>. Access the character as *(SvEND(sv)).
666 =for apidoc Am|HV*|SvSTASH|SV* sv
667 Returns the stash of the SV.
669 =for apidoc Am|void|SvIV_set|SV* sv|IV val
670 Set the value of the IV pointer in sv to val. It is possible to perform
671 the same function of this macro with an lvalue assignment to C<SvIVX>.
672 With future Perls, however, it will be more efficient to use
673 C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
675 =for apidoc Am|void|SvNV_set|SV* sv|NV val
676 Set the value of the NV pointer in sv to val. See C<SvIV_set>.
678 =for apidoc Am|void|SvPV_set|SV* sv|char* val
679 Set the value of the PV pointer in sv to val. See C<SvIV_set>.
681 =for apidoc Am|void|SvUV_set|SV* sv|UV val
682 Set the value of the UV pointer in sv to val. See C<SvIV_set>.
684 =for apidoc Am|void|SvRV_set|SV* sv|SV* val
685 Set the value of the RV pointer in sv to val. See C<SvIV_set>.
687 =for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
688 Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>.
690 =for apidoc Am|void|SvSTASH_set|SV* sv|HV* val
691 Set the value of the STASH pointer in sv to val. See C<SvIV_set>.
693 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
694 Set the current length of the string which is in the SV. See C<SvCUR>
697 =for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
698 Set the actual length of the string which is in the SV. See C<SvIV_set>.
703 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
704 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
705 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
706 SVp_IOK|SVp_NOK|SVf_IVisUV))
708 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
709 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
711 #define assert_not_ROK(sv)
714 #define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
715 #define SvOK_off(sv) (assert_not_ROK(sv) \
716 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
717 SVf_IVisUV|SVf_UTF8), \
719 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
720 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
724 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
725 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
726 #define SvIOKp_on(sv) ((void)SvOOK_off(sv), SvFLAGS(sv) |= SVp_IOK)
727 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
728 #define SvNOKp_on(sv) (SvFLAGS(sv) |= SVp_NOK)
729 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
730 #define SvPOKp_on(sv) (assert_not_ROK(sv) \
731 SvFLAGS(sv) |= SVp_POK)
733 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
734 #define SvIOK_on(sv) ((void)SvOOK_off(sv), \
735 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
736 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
737 #define SvIOK_only(sv) (SvOK_off(sv), \
738 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
739 #define SvIOK_only_UV(sv) (SvOK_off_exc_UV(sv), \
740 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
742 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
743 == (SVf_IOK|SVf_IVisUV))
744 #define SvUOK(sv) SvIOK_UV(sv)
745 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
748 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
749 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
750 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
752 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
753 #define SvNOK_on(sv) (SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
754 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
755 #define SvNOK_only(sv) (SvOK_off(sv), \
756 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
759 =for apidoc Am|bool|SvUTF8|SV* sv
760 Returns a boolean indicating whether the SV contains UTF-8 encoded data.
761 Call this after SvPV() in case any call to string overloading updates the
764 =for apidoc Am|void|SvUTF8_on|SV *sv
765 Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
766 Do not use frivolously.
768 =for apidoc Am|void|SvUTF8_off|SV *sv
769 Unsets the UTF-8 status of an SV.
771 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
772 Tells an SV that it is a string and disables all other OK bits,
773 and leaves the UTF-8 status as it was.
778 /* Ensure the return value of this macro does not clash with the GV_ADD* flags
780 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
781 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
782 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
784 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
785 #define SvPOK_on(sv) (assert_not_ROK(sv) \
786 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
787 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
788 #define SvPOK_only(sv) (assert_not_ROK(sv) \
789 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
790 SVf_IVisUV|SVf_UTF8), \
791 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
792 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) \
793 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
795 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
797 #define SvVOK(sv) (SvMAGICAL(sv) \
798 && mg_find(sv,PERL_MAGIC_vstring))
799 /* returns the vstring magic, if any */
800 #define SvVSTRING_mg(sv) (SvMAGICAL(sv) \
801 ? mg_find(sv,PERL_MAGIC_vstring) : NULL)
803 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
804 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
805 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
807 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
808 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
809 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
811 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
812 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
813 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVf_AMAGIC))
815 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
816 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
817 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
819 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
820 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
821 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
823 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
824 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
825 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
827 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
828 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
829 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
831 #define SvAMAGIC(sv) (SvFLAGS(sv) & SVf_AMAGIC)
832 #define SvAMAGIC_on(sv) (SvFLAGS(sv) |= SVf_AMAGIC)
833 #define SvAMAGIC_off(sv) (SvFLAGS(sv) &= ~SVf_AMAGIC)
835 #define SvGAMAGIC(sv) (SvFLAGS(sv) & (SVs_GMG|SVf_AMAGIC))
837 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
839 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
840 == (SVf_ROK|SVprv_WEAKREF))
841 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
842 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
844 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
846 #define SvPADBUSY(sv) (SvFLAGS(sv) & SVs_PADBUSY)
848 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
849 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP|SVs_PADBUSY)
850 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
852 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
853 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY|SVs_PADBUSY)
855 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
856 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
857 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
859 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
860 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
861 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
863 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
864 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
865 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
867 #define SvSCREAM(sv) (SvFLAGS(sv) & SVp_SCREAM)
868 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
869 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
871 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
872 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
873 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
875 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
876 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
877 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
879 #define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL)
880 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
881 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
883 #define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
884 #define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
885 #define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
888 /* The following uses the FAKE flag to show that a regex pointer is infact
889 its own offset in the regexpad for ithreads */
890 #define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
891 #define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
892 #define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
895 #define SvPAD_TYPED(sv) (SvFLAGS(sv) & SVpad_TYPED)
896 #define SvPAD_TYPED_on(sv) (SvFLAGS(sv) |= SVpad_TYPED)
897 #define SvPAD_TYPED_off(sv) (SvFLAGS(sv) &= ~SVpad_TYPED)
899 #define SvPAD_OUR(sv) (SvFLAGS(sv) & SVpad_OUR)
900 #define SvPAD_OUR_on(sv) (SvFLAGS(sv) |= SVpad_OUR)
901 #define SvPAD_OUR_off(sv) (SvFLAGS(sv) &= ~SVpad_OUR)
903 #define SvOURSTASH(sv) (SvPAD_OUR(sv) ? GvSTASH(sv) : NULL)
904 #define SvOURSTASH_set(sv, st) \
906 assert(SvTYPE(sv) == SVt_PVGV); \
910 #define SvRV(sv) ((XRV*) SvANY(sv))->xrv_rv
911 #define SvRVx(sv) SvRV(sv)
913 #define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
914 #define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
915 #define SvNVX(sv) ((XPVNV*)SvANY(sv))->xnv_nv
916 #define SvPVX(sv) ((XPV*) SvANY(sv))->xpv_pv
918 /* Given that these two are new, there can't be any existing code using them
920 # define SvPVX_mutable(sv) (0 + SvPVX(sv))
921 # define SvPVX_const(sv) ((const char*) (0 + SvPVX(sv)))
923 /* Except for the poison code, which uses & to scribble over the pointer after
925 # define SvPVX_mutable(sv) (SvPVX(sv))
926 # define SvPVX_const(sv) ((const char*) (SvPVX(sv)))
928 #define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
929 #define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
930 #define SvEND(sv)(((XPV*) SvANY(sv))->xpv_pv + ((XPV*)SvANY(sv))->xpv_cur)
932 #define SvIVXx(sv) SvIVX(sv)
933 #define SvUVXx(sv) SvUVX(sv)
934 #define SvNVXx(sv) SvNVX(sv)
935 #define SvPVXx(sv) SvPVX(sv)
936 #define SvLENx(sv) SvLEN(sv)
937 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
938 #define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
939 #define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
941 /* Ask a scalar nicely to try to become an IV, if possible.
942 Not guaranteed to stay returning void */
943 /* Macro won't actually call sv_2iv if already IOK */
944 #define SvIV_please(sv) \
945 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
946 (void) SvIV(sv); } STMT_END
947 /* Put the asserts back at some point and figure out where they reveal bugs
949 #define SvIV_set(sv, val) \
950 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
951 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
952 #define SvNV_set(sv, val) \
953 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
954 (((XPVNV*)SvANY(sv))->xnv_nv = (val)); } STMT_END
955 /* assert(SvTYPE(sv) >= SVt_PV); */
956 #define SvPV_set(sv, val) \
958 (((XPV*) SvANY(sv))->xpv_pv = (val)); } STMT_END
959 /* assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); */
960 #define SvUV_set(sv, val) \
962 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
963 /* assert(SvTYPE(sv) >= SVt_RV); */
964 #define SvRV_set(sv, val) \
966 (((XRV*)SvANY(sv))->xrv_rv = (val)); } STMT_END
967 /* assert(SvTYPE(sv) >= SVt_PVMG); */
968 #define SvMAGIC_set(sv, val) \
970 (((XPVMG*)SvANY(sv))->xmg_magic = (val)); } STMT_END
971 /* assert(SvTYPE(sv) >= SVt_PVMG); */
972 #define SvSTASH_set(sv, val) \
974 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
975 /* assert(SvTYPE(sv) >= SVt_PV); */
976 #define SvCUR_set(sv, val) \
978 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
979 /* assert(SvTYPE(sv) >= SVt_PV); */
980 #define SvLEN_set(sv, val) \
982 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
983 #define SvEND_set(sv, val) \
984 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
985 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
987 #define SvPV_renew(sv,n) \
988 STMT_START { SvLEN_set(sv, n); \
989 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
990 (char*)saferealloc((Malloc_t)SvPVX(sv), \
991 (MEM_SIZE)((n))))); \
994 #define SvPV_shrink_to_cur(sv) STMT_START { \
995 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
996 SvPV_renew(sv, _lEnGtH); \
999 #define SvPV_free(sv) \
1001 assert(SvTYPE(sv) >= SVt_PV); \
1004 SvPV_set(sv, SvPVX_mutable(sv) - SvIVX(sv)); \
1005 SvFLAGS(sv) &= ~SVf_OOK; \
1007 Safefree(SvPVX(sv)); \
1011 #define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
1012 #define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
1013 #define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
1015 #define PERL_FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table */
1016 #define PERL_FBM_FLAGS_OFFSET_FROM_TABLE -1
1018 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
1020 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
1021 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
1022 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
1023 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
1025 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
1026 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
1027 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
1028 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
1029 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
1030 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
1031 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
1032 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
1033 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
1034 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
1035 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
1036 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
1037 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
1038 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
1039 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
1040 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1041 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1043 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
1044 #define IoTYPE_RDONLY '<'
1045 #define IoTYPE_WRONLY '>'
1046 #define IoTYPE_RDWR '+'
1047 #define IoTYPE_APPEND 'a'
1048 #define IoTYPE_PIPE '|'
1049 #define IoTYPE_STD '-' /* stdin or stdout */
1050 #define IoTYPE_SOCKET 's'
1051 #define IoTYPE_CLOSED ' '
1052 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1053 #define IoTYPE_NUMERIC '#' /* fdopen */
1056 =for apidoc Am|bool|SvTAINTED|SV* sv
1057 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
1060 =for apidoc Am|void|SvTAINTED_on|SV* sv
1061 Marks an SV as tainted if tainting is enabled.
1063 =for apidoc Am|void|SvTAINTED_off|SV* sv
1064 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1065 some of Perl's fundamental security features. XS module authors should not
1066 use this function unless they fully understand all the implications of
1067 unconditionally untainting the value. Untainting should be done in the
1068 standard perl fashion, via a carefully crafted regexp, rather than directly
1069 untainting variables.
1071 =for apidoc Am|void|SvTAINT|SV* sv
1072 Taints an SV if tainting is enabled.
1077 #define sv_taint(sv) sv_magic((sv), NULL, PERL_MAGIC_taint, NULL, 0)
1079 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1080 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
1081 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
1083 #define SvTAINT(sv) \
1085 if (PL_tainting) { \
1092 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
1093 Like C<SvPV> but will force the SV into containing just a string
1094 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1097 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
1098 Like C<SvPV> but will force the SV into containing just a string
1099 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1100 directly. Doesn't process magic.
1102 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
1103 Returns a pointer to the string in the SV, or a stringified form of
1104 the SV if the SV does not contain a string. The SV may cache the
1105 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
1106 C<SvPVx> for a version which guarantees to evaluate sv only once.
1108 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
1109 A version of C<SvPV> which guarantees to evaluate sv only once.
1111 =for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1112 Like C<SvPV> but doesn't process magic.
1114 =for apidoc Am|char*|SvPV_nolen|SV* sv
1115 Returns a pointer to the string in the SV, or a stringified form of
1116 the SV if the SV does not contain a string. The SV may cache the
1117 stringified form becoming C<SvPOK>. Handles 'get' magic.
1119 =for apidoc Am|IV|SvIV|SV* sv
1120 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
1121 version which guarantees to evaluate sv only once.
1123 =for apidoc Am|IV|SvIV_nomg|SV* sv
1124 Like C<SvIV> but doesn't process magic.
1126 =for apidoc Am|IV|SvIVx|SV* sv
1127 Coerces the given SV to an integer and returns it. Guarantees to evaluate
1128 sv only once. Use the more efficient C<SvIV> otherwise.
1130 =for apidoc Am|NV|SvNV|SV* sv
1131 Coerce the given SV to a double and return it. See C<SvNVx> for a version
1132 which guarantees to evaluate sv only once.
1134 =for apidoc Am|NV|SvNVx|SV* sv
1135 Coerces the given SV to a double and returns it. Guarantees to evaluate
1136 sv only once. Use the more efficient C<SvNV> otherwise.
1138 =for apidoc Am|UV|SvUV|SV* sv
1139 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
1140 for a version which guarantees to evaluate sv only once.
1142 =for apidoc Am|UV|SvUV_nomg|SV* sv
1143 Like C<SvUV> but doesn't process magic.
1145 =for apidoc Am|UV|SvUVx|SV* sv
1146 Coerces the given SV to an unsigned integer and returns it. Guarantees to
1147 evaluate sv only once. Use the more efficient C<SvUV> otherwise.
1149 =for apidoc Am|bool|SvTRUE|SV* sv
1150 Returns a boolean indicating whether Perl would evaluate the SV as true or
1151 false, defined or undefined. Does not handle 'get' magic.
1153 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
1154 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1156 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
1157 Like C<SvPV>, but converts sv to utf8 first if necessary.
1159 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1160 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
1162 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1163 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1165 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1166 Like C<SvPV>, but converts sv to byte representation first if necessary.
1168 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1169 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1171 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1172 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1173 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1176 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1177 Like C<SvPV>, but converts sv to utf8 first if necessary.
1178 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1181 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1182 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1183 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1186 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1187 Like C<SvPV>, but converts sv to byte representation first if necessary.
1188 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1191 =for apidoc Am|bool|SvIsCOW|SV* sv
1192 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1193 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1196 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1197 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1200 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1201 Like C<sv_catpvn> but doesn't process magic.
1203 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1204 Like C<sv_setsv> but doesn't process magic.
1206 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1207 Like C<sv_catsv> but doesn't process magic.
1212 /* Let us hope that bitmaps for UV and IV are the same */
1213 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1214 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1215 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1217 #define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1218 #define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1222 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1223 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1224 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1226 #define SvPV_flags(sv, lp, flags) \
1227 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1228 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1229 #define SvPV_flags_const(sv, lp, flags) \
1230 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1231 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1232 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1233 #define SvPV_flags_const_nolen(sv, flags) \
1234 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1235 ? SvPVX_const(sv) : \
1236 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN))
1237 #define SvPV_flags_mutable(sv, lp, flags) \
1238 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1239 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1240 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1242 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1243 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1244 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1246 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1247 #define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
1249 #define SvPV_force_flags(sv, lp, flags) \
1250 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1251 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1252 #define SvPV_force_flags_nolen(sv, flags) \
1253 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1254 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1255 #define SvPV_force_flags_mutable(sv, lp, flags) \
1256 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1257 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1258 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1260 #define SvPV_nolen(sv) \
1261 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1262 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1264 #define SvPV_nolen_const(sv) \
1265 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1266 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1268 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1269 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1270 #define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
1274 #define SvPVutf8(sv, lp) \
1275 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1276 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1278 #define SvPVutf8_force(sv, lp) \
1279 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1280 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1283 #define SvPVutf8_nolen(sv) \
1284 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1285 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1289 #define SvPVbyte(sv, lp) \
1290 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1291 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1293 #define SvPVbyte_force(sv, lp) \
1294 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1295 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1297 #define SvPVbyte_nolen(sv) \
1298 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1299 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1303 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1304 * var to evaluate the arg once; failing that, use a global if possible;
1305 * failing that, call a function to do the work
1308 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1309 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1310 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1312 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1314 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1315 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1316 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1317 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1318 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1319 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1320 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1321 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1322 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1323 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1324 # define SvTRUE(sv) ( \
1328 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1330 (nxpv->xpv_cur > 1 || \
1331 (nxpv->xpv_cur && *nxpv->xpv_pv != '0')); }) \
1338 ? SvNVX(sv) != 0.0 \
1340 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1342 #else /* __GNUC__ */
1344 # ifdef USE_5005THREADS
1345 # define SvIVx(sv) sv_iv(sv)
1346 # define SvUVx(sv) sv_uv(sv)
1347 # define SvNVx(sv) sv_nv(sv)
1348 # define SvPVx(sv, lp) sv_pvn(sv, &lp)
1349 # define SvPVutf8x(sv, lp) sv_pvutf8n(sv, &lp)
1350 # define SvPVbytex(sv, lp) sv_pvbyten(sv, &lp)
1351 # define SvTRUE(sv) SvTRUEx(sv)
1352 # define SvTRUEx(sv) sv_true(sv)
1354 # else /* USE_5005THREADS */
1356 /* These inlined macros use globals, which will require a thread
1357 * declaration in user code, so we avoid them under threads */
1359 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1360 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1361 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1362 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1363 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1364 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1365 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1366 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1367 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1368 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1369 # define SvTRUE(sv) ( \
1373 ? ((PL_Xpv = (XPV*)SvANY(sv)) && \
1374 (PL_Xpv->xpv_cur > 1 || \
1375 (PL_Xpv->xpv_cur && *PL_Xpv->xpv_pv != '0')) \
1382 ? SvNVX(sv) != 0.0 \
1384 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1385 # endif /* USE_5005THREADS */
1386 #endif /* __GNU__ */
1388 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1389 (SVf_FAKE | SVf_READONLY))
1390 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1392 #define SvSHARED_HASH(sv) (0 + SvUVX(sv))
1394 /* flag values for sv_*_flags functions */
1395 #define SV_IMMEDIATE_UNREF 1
1397 #define SV_COW_DROP_PV 4 /* Unused in Perl 5.8.x */
1398 #define SV_UTF8_NO_ENCODING 8
1399 #define SV_NOSTEAL 16
1400 #define SV_CONST_RETURN 32
1401 #define SV_MUTABLE_RETURN 64
1402 #define SV_SMAGIC 128
1403 #define SV_HAS_TRAILING_NUL 256
1405 #define sv_unref(sv) sv_unref_flags(sv, 0)
1406 #define sv_force_normal(sv) sv_force_normal_flags(sv, 0)
1407 #define sv_usepvn(sv, p, l) sv_usepvn_flags(sv, p, l, 0)
1408 #define sv_usepvn_mg(sv, p, l) sv_usepvn_flags(sv, p, l, SV_SMAGIC)
1410 /* all these 'functions' are now just macros */
1412 #define sv_pv(sv) SvPV_nolen(sv)
1413 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1414 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1416 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1417 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1418 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1419 #define sv_setsv(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_GMAGIC)
1420 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, 0)
1421 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1422 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1423 #define sv_catsv_mg(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC|SV_SMAGIC)
1424 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1425 #define sv_catpvn_mg(sv, sstr, slen) \
1426 sv_catpvn_flags(sv, sstr, slen, SV_GMAGIC|SV_SMAGIC);
1427 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1428 #define sv_2pv_nolen(sv) sv_2pv(sv, 0)
1429 #define sv_2pvbyte_nolen(sv) sv_2pvbyte(sv, 0)
1430 #define sv_2pvutf8_nolen(sv) sv_2pvutf8(sv, 0)
1431 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1432 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1433 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1434 #define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1435 #define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
1437 /* Should be named SvCatPVN_utf8_upgrade? */
1438 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1441 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1443 sv_setpvn(nsv, sstr, slen); \
1445 sv_utf8_upgrade(nsv); \
1446 sv_catsv(dsv, nsv); \
1450 =for apidoc Am|SV*|newRV_inc|SV* sv
1452 Creates an RV wrapper for an SV. The reference count for the original SV is
1458 #define newRV_inc(sv) newRV(sv)
1460 /* the following macros update any magic values this sv is associated with */
1463 =head1 Magical Functions
1465 =for apidoc Am|void|SvGETMAGIC|SV* sv
1466 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1467 argument more than once.
1469 =for apidoc Am|void|SvSETMAGIC|SV* sv
1470 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1471 argument more than once.
1473 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1474 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1477 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1478 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1479 ssv. May evaluate arguments more than once.
1481 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1482 Like C<SvSetSV>, but does any set magic required afterwards.
1484 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1485 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1487 =for apidoc Am|void|SvSHARE|SV* sv
1488 Arranges for sv to be shared between threads if a suitable module
1491 =for apidoc Am|void|SvLOCK|SV* sv
1492 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1495 =for apidoc Am|void|SvUNLOCK|SV* sv
1496 Releases a mutual exclusion lock on sv if a suitable module
1499 =head1 SV Manipulation Functions
1501 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1502 Expands the character buffer in the SV so that it has room for the
1503 indicated number of bytes (remember to reserve space for an extra trailing
1504 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1505 Returns a pointer to the character buffer.
1510 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1511 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1512 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1514 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1515 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1517 #define SvSetSV_and(dst,src,finally) \
1519 if ((dst) != (src)) { \
1520 sv_setsv(dst, src); \
1524 #define SvSetSV_nosteal_and(dst,src,finally) \
1526 if ((dst) != (src)) { \
1527 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL); \
1532 #define SvSetSV(dst,src) \
1533 SvSetSV_and(dst,src,/*nothing*/;)
1534 #define SvSetSV_nosteal(dst,src) \
1535 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1537 #define SvSetMagicSV(dst,src) \
1538 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1539 #define SvSetMagicSV_nosteal(dst,src) \
1540 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1543 #if !defined(SKIP_DEBUGGING)
1544 #define SvPEEK(sv) sv_peek(sv)
1546 #define SvPEEK(sv) ""
1549 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1551 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1553 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1554 /* If I give every macro argument a different name, then there won't be bugs
1555 where nested macros get confused. Been there, done that. */
1556 #define isGV_with_GP(pwadak) \
1557 ((SvTYPE(pwadak) == SVt_PVGV || SvTYPE(pwadak) == SVt_PVLV))
1559 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1560 #define SvGROW_mutable(sv,len) \
1561 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
1562 #define Sv_Grow sv_grow
1564 #define CLONEf_COPY_STACKS 1
1565 #define CLONEf_KEEP_PTR_TABLE 2
1566 #define CLONEf_CLONE_HOST 4
1567 #define CLONEf_JOIN_IN 8
1569 struct clone_params {
1572 PerlInterpreter *proto_perl;
1575 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) sv_force_normal(sv)