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>.
56 /* PVBM was here, before BIND replaced it. */
64 SVt_LAST /* keep last in enum. used to size arrays */
68 /* Although Fast Boyer Moore tables are now being stored in PVGVs, for most
69 purposes eternal code wanting to consider PVBM probably needs to think of
71 # define SVt_PVBM SVt_PVMG
74 /* There is collusion here with sv_clear - sv_clear exits early for SVt_NULL
75 and SVt_IV, so never reaches the clause at the end that uses
76 sv_type_details->body_size to determine whether to call safefree(). Hence
77 body_size can be set no-zero to record the size of PTEs and HEs, without
78 fear of bogus frees. */
80 #define PTE_SVSLOT SVt_IV
82 #if defined(PERL_IN_HV_C) || defined(PERL_IN_XS_APITEST)
83 #define HE_SVSLOT SVt_NULL
86 #define PERL_ARENA_ROOTS_SIZE (SVt_LAST)
88 /* typedefs to eliminate some typing */
90 typedef struct hek HEK;
92 /* Using C's structural equivalence to help emulate C++ inheritance here... */
94 /* start with 2 sv-head building blocks */
95 #define _SV_HEAD(ptrtype) \
96 ptrtype sv_any; /* pointer to body */ \
97 U32 sv_refcnt; /* how many references to us */ \
98 U32 sv_flags /* what we are */
100 #define _SV_HEAD_UNION \
104 SV* svu_rv; /* pointer to another SV */ \
105 char* svu_pv; /* pointer to malloced string */ \
112 struct STRUCT_SV { /* struct sv { */
115 #ifdef DEBUG_LEAKING_SCALARS
116 unsigned sv_debug_optype:9; /* the type of OP that allocated us */
117 unsigned sv_debug_inpad:1; /* was allocated in a pad for an OP */
118 unsigned sv_debug_cloned:1; /* was cloned for an ithread */
119 unsigned sv_debug_line:16; /* the line where we were allocated */
120 char * sv_debug_file; /* the file where we were allocated */
125 _SV_HEAD(XPVGV*); /* pointer to xpvgv body */
130 _SV_HEAD(XPVCV*); /* pointer to xpvcv body */
135 _SV_HEAD(XPVAV*); /* pointer to xpvav body */
140 _SV_HEAD(XPVHV*); /* pointer to xpvhv body */
145 _SV_HEAD(XPVIO*); /* pointer to xpvio body */
150 #undef _SV_HEAD_UNION /* ensure no pollution */
153 =head1 SV Manipulation Functions
155 =for apidoc Am|U32|SvREFCNT|SV* sv
156 Returns the value of the object's reference count.
158 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
159 Increments the reference count of the given SV.
161 All of the following SvREFCNT_inc* macros are optimized versions of
162 SvREFCNT_inc, and can be replaced with SvREFCNT_inc.
164 =for apidoc Am|SV*|SvREFCNT_inc_NN|SV* sv
165 Same as SvREFCNT_inc, but can only be used if you know I<sv>
166 is not NULL. Since we don't have to check the NULLness, it's faster
169 =for apidoc Am|void|SvREFCNT_inc_void|SV* sv
170 Same as SvREFCNT_inc, but can only be used if you don't need the
171 return value. The macro doesn't need to return a meaningful value.
173 =for apidoc Am|void|SvREFCNT_inc_void_NN|SV* sv
174 Same as SvREFCNT_inc, but can only be used if you don't need the return
175 value, and you know that I<sv> is not NULL. The macro doesn't need
176 to return a meaningful value, or check for NULLness, so it's smaller
179 =for apidoc Am|SV*|SvREFCNT_inc_simple|SV* sv
180 Same as SvREFCNT_inc, but can only be used with simple variables, not
181 expressions or pointer dereferences. Since we don't have to store a
182 temporary value, it's faster.
184 =for apidoc Am|SV*|SvREFCNT_inc_simple_NN|SV* sv
185 Same as SvREFCNT_inc_simple, but can only be used if you know I<sv>
186 is not NULL. Since we don't have to check the NULLness, it's faster
189 =for apidoc Am|void|SvREFCNT_inc_simple_void|SV* sv
190 Same as SvREFCNT_inc_simple, but can only be used if you don't need the
191 return value. The macro doesn't need to return a meaningful value.
193 =for apidoc Am|void|SvREFCNT_inc_simple_void_NN|SV* sv
194 Same as SvREFCNT_inc, but can only be used if you don't need the return
195 value, and you know that I<sv> is not NULL. The macro doesn't need
196 to return a meaningful value, or check for NULLness, so it's smaller
199 =for apidoc Am|void|SvREFCNT_dec|SV* sv
200 Decrements the reference count of the given SV.
202 =for apidoc Am|svtype|SvTYPE|SV* sv
203 Returns the type of the SV. See C<svtype>.
205 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
206 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
207 perform the upgrade if necessary. See C<svtype>.
212 #define SvANY(sv) (sv)->sv_any
213 #define SvFLAGS(sv) (sv)->sv_flags
214 #define SvREFCNT(sv) (sv)->sv_refcnt
216 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
217 # define SvREFCNT_inc(sv) \
219 SV * const _sv = (SV*)(sv); \
224 # define SvREFCNT_inc_simple(sv) \
230 # define SvREFCNT_inc_NN(sv) \
232 SV * const _sv = (SV*)(sv); \
236 # define SvREFCNT_inc_void(sv) \
238 SV * const _sv = (SV*)(sv); \
240 (void)(SvREFCNT(_sv)++); \
243 # define SvREFCNT_inc(sv) \
244 ((PL_Sv=(SV*)(sv)) ? (++(SvREFCNT(PL_Sv)),PL_Sv) : NULL)
245 # define SvREFCNT_inc_simple(sv) \
246 ((sv) ? (SvREFCNT(sv)++,(SV*)(sv)) : NULL)
247 # define SvREFCNT_inc_NN(sv) \
248 (PL_Sv=(SV*)(sv),++(SvREFCNT(PL_Sv)),PL_Sv)
249 # define SvREFCNT_inc_void(sv) \
250 (void)((PL_Sv=(SV*)(sv)) ? ++(SvREFCNT(PL_Sv)) : 0)
253 /* These guys don't need the curly blocks */
254 #define SvREFCNT_inc_simple_void(sv) STMT_START { if (sv) SvREFCNT(sv)++; } STMT_END
255 #define SvREFCNT_inc_simple_NN(sv) (++(SvREFCNT(sv)),(SV*)(sv))
256 #define SvREFCNT_inc_void_NN(sv) (void)(++SvREFCNT((SV*)(sv)))
257 #define SvREFCNT_inc_simple_void_NN(sv) (void)(++SvREFCNT((SV*)(sv)))
259 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
260 # define SvREFCNT_dec(sv) \
262 SV * const _sv = (SV*)(sv); \
264 if (SvREFCNT(_sv)) { \
265 if (--(SvREFCNT(_sv)) == 0) \
266 Perl_sv_free2(aTHX_ _sv); \
273 #define SvREFCNT_dec(sv) sv_free((SV*)(sv))
276 #define SVTYPEMASK 0xff
277 #define SvTYPE(sv) (svtype)((sv)->sv_flags & SVTYPEMASK)
279 /* Sadly there are some parts of the core that have pointers to already-freed
280 SV heads, and rely on being able to tell that they are now free. So mark
281 them all by using a consistent macro. */
282 #define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
284 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= (mt) || (sv_upgrade(sv, mt), 1))
286 #define SVf_IOK 0x00000100 /* has valid public integer value */
287 #define SVf_NOK 0x00000200 /* has valid public numeric value */
288 #define SVf_POK 0x00000400 /* has valid public pointer value */
289 #define SVf_ROK 0x00000800 /* has a valid reference pointer */
291 #define SVp_IOK 0x00001000 /* has valid non-public integer value */
292 #define SVp_NOK 0x00002000 /* has valid non-public numeric value */
293 #define SVp_POK 0x00004000 /* has valid non-public pointer value */
294 #define SVp_SCREAM 0x00008000 /* has been studied? */
295 #define SVphv_CLONEABLE SVp_SCREAM /* PVHV (stashes) clone its objects */
296 #define SVpgv_GP SVp_SCREAM /* GV has a valid GP */
298 #define SVs_PADSTALE 0x00010000 /* lexical has gone out of scope */
299 #define SVpad_STATE 0x00010000 /* pad name is a "state" var */
300 #define SVs_PADTMP 0x00020000 /* in use as tmp */
301 #define SVpad_TYPED 0x00020000 /* pad name is a Typed Lexical */
302 #define SVs_PADMY 0x00040000 /* in use a "my" variable */
303 #define SVpad_OUR 0x00040000 /* pad name is "our" instead of "my" */
304 #define SVs_TEMP 0x00080000 /* string is stealable? */
305 #define SVs_OBJECT 0x00100000 /* is "blessed" */
306 #define SVs_GMG 0x00200000 /* has magical get method */
307 #define SVs_SMG 0x00400000 /* has magical set method */
308 #define SVs_RMG 0x00800000 /* has random magical methods */
310 #define SVf_FAKE 0x01000000 /* 0: glob or lexical is just a copy
311 1: SV head arena wasn't malloc()ed
312 2: in conjunction with SVf_READONLY
313 marks a shared hash key scalar
314 (SvLEN == 0) or a copy on write
315 string (SvLEN != 0) [SvIsCOW(sv)]
316 3: For PVCV, whether CvUNIQUE(cv)
317 refers to an eval or once only
318 [CvEVAL(cv), CvSPECIAL(cv)]
319 4: Whether the regexp pointer is in
320 fact an offset [SvREPADTMP(sv)]
321 5: On a pad name SV, that slot in the
322 frame AV is a REFCNT'ed reference
323 to a lexical from "outside". */
324 #define SVphv_REHASH SVf_FAKE /* 6: On a PVHV, hash values are being
326 #define SVf_OOK 0x02000000 /* has valid offset value. For a PVHV this
327 means that a hv_aux struct is present
328 after the main array */
329 #define SVf_BREAK 0x04000000 /* refcnt is artificially low - used by
330 SV's in final arena cleanup */
331 #define SVf_READONLY 0x08000000 /* may not be modified */
336 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
338 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
339 SVp_IOK|SVp_NOK|SVp_POK|SVpgv_GP)
341 #define PRIVSHIFT 4 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
343 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
344 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded
345 This is also set on RVs whose overloaded
346 stringification is UTF-8. This might
347 only happen as a side effect of SvPV() */
349 /* Ensure this value does not clash with the GV_ADD* flags in gv.h */
351 /* Some private flags. */
354 #define SVphv_SHAREKEYS 0x20000000 /* PVHV keys live on shared string table */
355 /* PVNV, PVMG, presumably only inside pads */
356 #define SVpad_NAME 0x40000000 /* This SV is a name in the PAD, so
357 SVpad_TYPED, SVpad_OUR and SVpad_STATE
360 #define SVpav_REAL 0x40000000 /* free old entries */
362 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
363 /* This is only set true on a PVGV when it's playing "PVBM", but is tested for
364 on any regular scalar (anything <= PVLV) */
365 #define SVpbm_VALID 0x40000000
367 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
369 /* IV, PVIV, PVNV, PVMG, PVGV and (I assume) PVLV */
370 /* Presumably IVs aren't stored in pads */
371 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
373 #define SVpav_REIFY 0x80000000 /* can become real */
375 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
377 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
378 /* PVGV when SVpbm_VALID is true */
379 #define SVpbm_TAIL 0x80000000
380 /* RV upwards. However, SVf_ROK and SVp_IOK are exclusive */
381 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
386 NV xnv_nv; /* numeric value, if any */
389 STRLEN xpv_cur; /* length of svu_pv as a C string */
390 STRLEN xpv_len; /* allocated size */
394 typedef struct xpv xpv_allocated;
397 STRLEN xpv_cur; /* length of svu_pv as a C string */
398 STRLEN xpv_len; /* allocated size */
404 NV xnv_nv; /* numeric value, if any */
407 STRLEN xpv_cur; /* length of svu_pv as a C string */
408 STRLEN xpv_len; /* allocated size */
410 IV xivu_iv; /* integer value or pv offset */
419 typedef struct xpviv xpviv_allocated;
422 STRLEN xpv_cur; /* length of svu_pv as a C string */
423 STRLEN xpv_len; /* allocated size */
425 IV xivu_iv; /* integer value or pv offset */
434 #define xiv_iv xiv_u.xivu_iv
438 NV xnv_nv; /* numeric value, if any */
441 STRLEN xpv_cur; /* length of svu_pv as a C string */
442 STRLEN xpv_len; /* allocated size */
445 UV xuvu_uv; /* unsigned value or pv offset */
451 #define xuv_uv xuv_u.xuvu_uv
455 NV xnv_nv; /* numeric value, if any */
458 STRLEN xpv_cur; /* length of svu_pv as a C string */
459 STRLEN xpv_len; /* allocated size */
461 IV xivu_iv; /* integer value or pv offset */
469 /* These structure must match the beginning of struct xpvhv in hv.h. */
472 NV xnv_nv; /* numeric value, if any */
475 STRLEN xpv_cur; /* length of svu_pv as a C string */
476 STRLEN xpv_len; /* allocated size */
478 IV xivu_iv; /* integer value or pv offset */
485 MAGIC* xmg_magic; /* linked list of magicalness */
486 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
488 HV* xmg_stash; /* class package */
493 NV xnv_nv; /* numeric value, if any */
496 STRLEN xpv_cur; /* length of svu_pv as a C string */
497 STRLEN xpv_len; /* allocated size */
499 IV xivu_iv; /* integer value or pv offset */
503 HEK * xivu_namehek; /* GvNAME */
506 MAGIC* xmg_magic; /* linked list of magicalness */
507 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
509 HV* xmg_stash; /* class package */
514 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
515 * y=alem/helem/iter t=tie T=tied HE */
518 /* This structure works in 3 ways - regular scalar, GV with GP, or fast
523 HV * xgv_stash; /* The stash of this GV */
525 STRLEN xpv_cur; /* xgv_flags */
526 STRLEN xpv_len; /* 0 */
531 I32 xivu_i32; /* is this constant pattern being useful? */
532 HEK * xivu_namehek; /* GvNAME */
535 MAGIC* xmg_magic; /* linked list of magicalness */
536 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
538 HV* xmg_stash; /* class package */
542 /* This structure must match XPVCV in cv.h */
544 typedef U16 cv_flags_t;
548 NV xnv_nv; /* numeric value, if any */
551 STRLEN xpv_cur; /* length of svu_pv as a C string */
552 STRLEN xpv_len; /* allocated size */
554 IV xivu_iv; /* PVFMs use the pv offset */
561 MAGIC* xmg_magic; /* linked list of magicalness */
562 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
564 HV* xmg_stash; /* class package */
573 void (*xcv_xsub) (pTHX_ CV*);
579 U32 xcv_outside_seq; /* the COP sequence (at the point of our
580 * compilation) in the lexically enclosing
582 cv_flags_t xcv_flags;
587 STRLEN xpv_cur; /* length of svu_pv as a C string */
588 STRLEN xpv_len; /* allocated size */
590 IV xivu_iv; /* PVFMs use the pv offset */
597 MAGIC* xmg_magic; /* linked list of magicalness */
598 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
600 HV* xmg_stash; /* class package */
609 void (*xcv_xsub) (pTHX_ CV*);
615 U32 xcv_outside_seq; /* the COP sequence (at the point of our
616 * compilation) in the lexically enclosing
618 cv_flags_t xcv_flags;
624 NV xnv_nv; /* numeric value, if any */
627 STRLEN xpv_cur; /* length of svu_pv as a C string */
628 STRLEN xpv_len; /* allocated size */
630 IV xivu_iv; /* integer value or pv offset */
637 MAGIC* xmg_magic; /* linked list of magicalness */
638 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
640 HV* xmg_stash; /* class package */
642 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
643 PerlIO * xio_ofp; /* but sockets need separate streams */
644 /* Cray addresses everything by word boundaries (64 bits) and
645 * code and data pointers cannot be mixed (which is exactly what
646 * Perl_filter_add() tries to do with the dirp), hence the following
647 * union trick (as suggested by Gurusamy Sarathy).
648 * For further information see Geir Johansen's problem report titled
649 [ID 20000612.002] Perl problem on Cray system
650 * The any pointer (known as IoANY()) will also be a good place
651 * to hang any IO disciplines to.
654 DIR * xiou_dirp; /* for opendir, readdir, etc */
655 void * xiou_any; /* for alignment */
657 IV xio_lines; /* $. */
658 IV xio_page; /* $% */
659 IV xio_page_len; /* $= */
660 IV xio_lines_left; /* $- */
661 char * xio_top_name; /* $^ */
662 GV * xio_top_gv; /* $^ */
663 char * xio_fmt_name; /* $~ */
664 GV * xio_fmt_gv; /* $~ */
665 char * xio_bottom_name;/* $^B */
666 GV * xio_bottom_gv; /* $^B */
667 short xio_subprocess; /* -| or |- */
671 #define xio_dirp xio_dirpu.xiou_dirp
672 #define xio_any xio_dirpu.xiou_any
674 #define IOf_ARGV 1 /* this fp iterates over ARGV */
675 #define IOf_START 2 /* check for null ARGV and substitute '-' */
676 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
677 #define IOf_DIDTOP 8 /* just did top of form */
678 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
679 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
680 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
682 /* The following macros define implementation-independent predicates on SVs. */
685 =for apidoc Am|bool|SvNIOK|SV* sv
686 Returns a boolean indicating whether the SV contains a number, integer or
689 =for apidoc Am|bool|SvNIOKp|SV* sv
690 Returns a boolean indicating whether the SV contains a number, integer or
691 double. Checks the B<private> setting. Use C<SvNIOK>.
693 =for apidoc Am|void|SvNIOK_off|SV* sv
694 Unsets the NV/IV status of an SV.
696 =for apidoc Am|bool|SvOK|SV* sv
697 Returns a boolean indicating whether the value is an SV. It also tells
698 whether the value is defined or not.
700 =for apidoc Am|bool|SvIOKp|SV* sv
701 Returns a boolean indicating whether the SV contains an integer. Checks
702 the B<private> setting. Use C<SvIOK>.
704 =for apidoc Am|bool|SvNOKp|SV* sv
705 Returns a boolean indicating whether the SV contains a double. Checks the
706 B<private> setting. Use C<SvNOK>.
708 =for apidoc Am|bool|SvPOKp|SV* sv
709 Returns a boolean indicating whether the SV contains a character string.
710 Checks the B<private> setting. Use C<SvPOK>.
712 =for apidoc Am|bool|SvIOK|SV* sv
713 Returns a boolean indicating whether the SV contains an integer.
715 =for apidoc Am|void|SvIOK_on|SV* sv
716 Tells an SV that it is an integer.
718 =for apidoc Am|void|SvIOK_off|SV* sv
719 Unsets the IV status of an SV.
721 =for apidoc Am|void|SvIOK_only|SV* sv
722 Tells an SV that it is an integer and disables all other OK bits.
724 =for apidoc Am|void|SvIOK_only_UV|SV* sv
725 Tells and SV that it is an unsigned integer and disables all other OK bits.
727 =for apidoc Am|bool|SvIOK_UV|SV* sv
728 Returns a boolean indicating whether the SV contains an unsigned integer.
730 =for apidoc Am|void|SvUOK|SV* sv
731 Returns a boolean indicating whether the SV contains an unsigned integer.
733 =for apidoc Am|bool|SvIOK_notUV|SV* sv
734 Returns a boolean indicating whether the SV contains a signed integer.
736 =for apidoc Am|bool|SvNOK|SV* sv
737 Returns a boolean indicating whether the SV contains a double.
739 =for apidoc Am|void|SvNOK_on|SV* sv
740 Tells an SV that it is a double.
742 =for apidoc Am|void|SvNOK_off|SV* sv
743 Unsets the NV status of an SV.
745 =for apidoc Am|void|SvNOK_only|SV* sv
746 Tells an SV that it is a double and disables all other OK bits.
748 =for apidoc Am|bool|SvPOK|SV* sv
749 Returns a boolean indicating whether the SV contains a character
752 =for apidoc Am|void|SvPOK_on|SV* sv
753 Tells an SV that it is a string.
755 =for apidoc Am|void|SvPOK_off|SV* sv
756 Unsets the PV status of an SV.
758 =for apidoc Am|void|SvPOK_only|SV* sv
759 Tells an SV that it is a string and disables all other OK bits.
760 Will also turn off the UTF-8 status.
762 =for apidoc Am|bool|SvVOK|SV* sv
763 Returns a boolean indicating whether the SV contains a v-string.
765 =for apidoc Am|bool|SvOOK|SV* sv
766 Returns a boolean indicating whether the SvIVX is a valid offset value for
767 the SvPVX. This hack is used internally to speed up removal of characters
768 from the beginning of a SvPV. When SvOOK is true, then the start of the
769 allocated string buffer is really (SvPVX - SvIVX).
771 =for apidoc Am|bool|SvROK|SV* sv
772 Tests if the SV is an RV.
774 =for apidoc Am|void|SvROK_on|SV* sv
775 Tells an SV that it is an RV.
777 =for apidoc Am|void|SvROK_off|SV* sv
778 Unsets the RV status of an SV.
780 =for apidoc Am|SV*|SvRV|SV* sv
781 Dereferences an RV to return the SV.
783 =for apidoc Am|IV|SvIVX|SV* sv
784 Returns the raw value in the SV's IV slot, without checks or conversions.
785 Only use when you are sure SvIOK is true. See also C<SvIV()>.
787 =for apidoc Am|UV|SvUVX|SV* sv
788 Returns the raw value in the SV's UV slot, without checks or conversions.
789 Only use when you are sure SvIOK is true. See also C<SvUV()>.
791 =for apidoc Am|NV|SvNVX|SV* sv
792 Returns the raw value in the SV's NV slot, without checks or conversions.
793 Only use when you are sure SvNOK is true. See also C<SvNV()>.
795 =for apidoc Am|char*|SvPVX|SV* sv
796 Returns a pointer to the physical string in the SV. The SV must contain a
799 =for apidoc Am|STRLEN|SvCUR|SV* sv
800 Returns the length of the string which is in the SV. See C<SvLEN>.
802 =for apidoc Am|STRLEN|SvLEN|SV* sv
803 Returns the size of the string buffer in the SV, not including any part
804 attributable to C<SvOOK>. See C<SvCUR>.
806 =for apidoc Am|char*|SvEND|SV* sv
807 Returns a pointer to the last character in the string which is in the SV.
808 See C<SvCUR>. Access the character as *(SvEND(sv)).
810 =for apidoc Am|HV*|SvSTASH|SV* sv
811 Returns the stash of the SV.
813 =for apidoc Am|void|SvIV_set|SV* sv|IV val
814 Set the value of the IV pointer in sv to val. It is possible to perform
815 the same function of this macro with an lvalue assignment to C<SvIVX>.
816 With future Perls, however, it will be more efficient to use
817 C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
819 =for apidoc Am|void|SvNV_set|SV* sv|NV val
820 Set the value of the NV pointer in sv to val. See C<SvIV_set>.
822 =for apidoc Am|void|SvPV_set|SV* sv|char* val
823 Set the value of the PV pointer in sv to val. See C<SvIV_set>.
825 =for apidoc Am|void|SvUV_set|SV* sv|UV val
826 Set the value of the UV pointer in sv to val. See C<SvIV_set>.
828 =for apidoc Am|void|SvRV_set|SV* sv|SV* val
829 Set the value of the RV pointer in sv to val. See C<SvIV_set>.
831 =for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
832 Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>.
834 =for apidoc Am|void|SvSTASH_set|SV* sv|HV* val
835 Set the value of the STASH pointer in sv to val. See C<SvIV_set>.
837 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
838 Set the current length of the string which is in the SV. See C<SvCUR>
841 =for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
842 Set the actual length of the string which is in the SV. See C<SvIV_set>.
847 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
848 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
849 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
850 SVp_IOK|SVp_NOK|SVf_IVisUV))
852 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
853 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
854 #define assert_not_glob(sv) ({assert(!isGV_with_GP(sv));}),
856 #define assert_not_ROK(sv)
857 #define assert_not_glob(sv)
860 #define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
861 #define SvOK_off(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
862 SvFLAGS(sv) &= ~(SVf_OK| \
863 SVf_IVisUV|SVf_UTF8), \
865 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
866 SvFLAGS(sv) &= ~(SVf_OK| \
870 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
871 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
872 #define SvIOKp_on(sv) (assert_not_glob(sv) SvRELEASE_IVX(sv), \
873 SvFLAGS(sv) |= SVp_IOK)
874 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
875 #define SvNOKp_on(sv) (assert_not_glob(sv) SvFLAGS(sv) |= SVp_NOK)
876 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
877 #define SvPOKp_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
878 SvFLAGS(sv) |= SVp_POK)
880 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
881 #define SvIOK_on(sv) (assert_not_glob(sv) SvRELEASE_IVX(sv), \
882 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
883 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
884 #define SvIOK_only(sv) (SvOK_off(sv), \
885 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
886 #define SvIOK_only_UV(sv) (assert_not_glob(sv) SvOK_off_exc_UV(sv), \
887 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
889 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
890 == (SVf_IOK|SVf_IVisUV))
891 #define SvUOK(sv) SvIOK_UV(sv)
892 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
895 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
896 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
897 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
899 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
900 #define SvNOK_on(sv) (assert_not_glob(sv) \
901 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
902 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
903 #define SvNOK_only(sv) (SvOK_off(sv), \
904 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
907 =for apidoc Am|bool|SvUTF8|SV* sv
908 Returns a boolean indicating whether the SV contains UTF-8 encoded data.
909 Call this after SvPV() in case any call to string overloading updates the
912 =for apidoc Am|void|SvUTF8_on|SV *sv
913 Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
914 Do not use frivolously.
916 =for apidoc Am|void|SvUTF8_off|SV *sv
917 Unsets the UTF-8 status of an SV.
919 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
920 Tells an SV that it is a string and disables all other OK bits,
921 and leaves the UTF-8 status as it was.
926 /* Ensure the return value of this macro does not clash with the GV_ADD* flags
928 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
929 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
930 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
932 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
933 #define SvPOK_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
934 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
935 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
936 #define SvPOK_only(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
937 SvFLAGS(sv) &= ~(SVf_OK| \
938 SVf_IVisUV|SVf_UTF8), \
939 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
940 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
941 SvFLAGS(sv) &= ~(SVf_OK| \
943 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
945 #define SvVOK(sv) (SvMAGICAL(sv) \
946 && mg_find(sv,PERL_MAGIC_vstring))
947 /* returns the vstring magic, if any */
948 #define SvVSTRING_mg(sv) (SvMAGICAL(sv) \
949 ? mg_find(sv,PERL_MAGIC_vstring) : NULL)
951 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
952 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
953 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
955 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
956 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
957 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
959 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
960 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
961 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK))
963 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
964 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
965 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
967 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
968 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
969 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
971 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
972 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
973 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
975 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
976 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
977 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
979 #define SvAMAGIC(sv) (SvROK(sv) && (SvFLAGS(SvRV(sv)) & SVf_AMAGIC))
980 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
981 # define SvAMAGIC_on(sv) ({ SV * const kloink = sv; \
982 assert(SvROK(kloink)); \
983 SvFLAGS(SvRV(kloink)) |= SVf_AMAGIC; \
985 # define SvAMAGIC_off(sv) ({ SV * const kloink = sv; \
987 SvFLAGS(SvRV(kloink)) &= ~SVf_AMAGIC;\
990 # define SvAMAGIC_on(sv) (SvFLAGS(SvRV(sv)) |= SVf_AMAGIC)
991 # define SvAMAGIC_off(sv) \
992 (SvROK(sv) && (SvFLAGS(SvRV(sv)) &= ~SVf_AMAGIC))
996 =for apidoc Am|char*|SvGAMAGIC|SV* sv
998 Returns true if the SV has get magic or overloading. If either is true then
999 the scalar is active data, and has the potential to return a new value every
1000 time it is accessed. Hence you must be careful to only read it once per user
1001 logical operation and work with that returned value. If neither is true then
1002 the scalar's value cannot change unless written to.
1007 #define SvGAMAGIC(sv) (SvGMAGICAL(sv) || SvAMAGIC(sv))
1009 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
1011 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
1012 == (SVf_ROK|SVprv_WEAKREF))
1013 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
1014 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
1016 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
1018 #define SvPADSTALE(sv) (SvFLAGS(sv) & SVs_PADSTALE)
1019 #define SvPADSTALE_on(sv) (SvFLAGS(sv) |= SVs_PADSTALE)
1020 #define SvPADSTALE_off(sv) (SvFLAGS(sv) &= ~SVs_PADSTALE)
1022 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
1023 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
1024 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
1026 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
1027 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY)
1029 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
1030 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
1031 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
1033 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
1034 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
1035 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
1037 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
1038 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
1039 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
1041 #define SvSCREAM(sv) ((SvFLAGS(sv) & (SVp_SCREAM|SVp_POK)) == (SVp_SCREAM|SVp_POK))
1042 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
1043 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
1045 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
1046 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
1047 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
1049 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
1050 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
1051 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
1053 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1054 # define SvVALID(sv) ({ SV *const thwacke = (SV *) (sv); \
1055 if (SvFLAGS(thwacke) & SVpbm_VALID) \
1056 assert(!isGV_with_GP(thwacke)); \
1057 (SvFLAGS(thwacke) & SVpbm_VALID); \
1059 # define SvVALID_on(sv) ({ SV *const thwacke = (SV *) (sv); \
1060 assert(!isGV_with_GP(thwacke)); \
1061 (SvFLAGS(thwacke) |= SVpbm_VALID); \
1063 # define SvVALID_off(sv) ({ SV *const thwacke = (SV *) (sv); \
1064 assert(!isGV_with_GP(thwacke)); \
1065 (SvFLAGS(thwacke) &= ~SVpbm_VALID); \
1068 # define SvTAIL(sv) ({ SV *const _svi = (SV *) (sv); \
1069 assert(SvTYPE(_svi) != SVt_PVAV); \
1070 assert(SvTYPE(_svi) != SVt_PVHV); \
1071 (SvFLAGS(sv) & (SVpbm_TAIL|SVpbm_VALID)) \
1072 == (SVpbm_TAIL|SVpbm_VALID); \
1075 # define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
1076 # define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
1077 # define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
1078 # define SvTAIL(sv) ((SvFLAGS(sv) & (SVpbm_TAIL|SVpbm_VALID)) \
1079 == (SVpbm_TAIL|SVpbm_VALID))
1082 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
1083 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
1087 /* The following uses the FAKE flag to show that a regex pointer is infact
1088 its own offset in the regexpad for ithreads */
1089 #define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
1090 #define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
1091 #define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
1094 #define SvPAD_TYPED(sv) \
1095 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_TYPED)) == (SVpad_NAME|SVpad_TYPED))
1097 #define SvPAD_OUR(sv) \
1098 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_OUR)) == (SVpad_NAME|SVpad_OUR))
1100 #define SvPAD_STATE(sv) \
1101 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_STATE)) == (SVpad_NAME|SVpad_STATE))
1103 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1104 # define SvPAD_TYPED_on(sv) ({ \
1105 SV *const whap = (SV *) (sv); \
1106 assert(SvTYPE(whap) == SVt_PVMG); \
1107 (SvFLAGS(whap) |= SVpad_NAME|SVpad_TYPED); \
1109 #define SvPAD_OUR_on(sv) ({ \
1110 SV *const whap = (SV *) (sv); \
1111 assert(SvTYPE(whap) == SVt_PVMG); \
1112 (SvFLAGS(whap) |= SVpad_NAME|SVpad_OUR); \
1114 #define SvPAD_STATE_on(sv) ({ \
1115 SV *const whap = (SV *) (sv); \
1116 assert(SvTYPE(whap) == SVt_PVNV || SvTYPE(whap) == SVt_PVMG); \
1117 (SvFLAGS(whap) |= SVpad_NAME|SVpad_STATE); \
1120 # define SvPAD_TYPED_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_TYPED)
1121 # define SvPAD_OUR_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_OUR)
1122 # define SvPAD_STATE_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_STATE)
1125 #define OURSTASH(sv) \
1126 (SvPAD_OUR(sv) ? ((XPVMG*) SvANY(sv))->xmg_u.xmg_ourstash : NULL)
1127 #define OURSTASH_set(sv, st) \
1129 assert(SvTYPE(sv) == SVt_PVMG); \
1130 ((XPVMG*) SvANY(sv))->xmg_u.xmg_ourstash = st; \
1133 #ifdef PERL_DEBUG_COW
1134 #define SvRV(sv) (0 + (sv)->sv_u.svu_rv)
1136 #define SvRV(sv) ((sv)->sv_u.svu_rv)
1138 #define SvRVx(sv) SvRV(sv)
1140 #ifdef PERL_DEBUG_COW
1141 /* Need -0.0 for SvNVX to preserve IEEE FP "negative zero" because
1142 +0.0 + -0.0 => +0.0 but -0.0 + -0.0 => -0.0 */
1143 # define SvIVX(sv) (0 + ((XPVIV*) SvANY(sv))->xiv_iv)
1144 # define SvUVX(sv) (0 + ((XPVUV*) SvANY(sv))->xuv_uv)
1145 # define SvNVX(sv) (-0.0 + ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv)
1146 /* Don't test the core XS code yet. */
1147 # if defined (PERL_CORE) && PERL_DEBUG_COW > 1
1148 # define SvPVX(sv) (0 + (assert(!SvREADONLY(sv)), (sv)->sv_u.svu_pv))
1150 # define SvPVX(sv) SvPVX_mutable(sv)
1152 # define SvCUR(sv) (0 + ((XPV*) SvANY(sv))->xpv_cur)
1153 # define SvLEN(sv) (0 + ((XPV*) SvANY(sv))->xpv_len)
1154 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1157 # define SvMAGIC(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_u.xmg_magic))
1158 # define SvSTASH(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
1160 # define SvMAGIC(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic)
1161 # define SvSTASH(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_stash)
1164 # define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
1165 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1167 # if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1168 /* These get expanded inside other macros that already use a variable _sv */
1169 # define SvPVX(sv) \
1170 (*({ SV *const _svi = (SV *) (sv); \
1171 assert(SvTYPE(_svi) >= SVt_PV); \
1172 assert(SvTYPE(_svi) != SVt_PVAV); \
1173 assert(SvTYPE(_svi) != SVt_PVHV); \
1174 assert(!isGV_with_GP(_svi)); \
1175 &((_svi)->sv_u.svu_pv); \
1177 # define SvCUR(sv) \
1178 (*({ SV *const _svi = (SV *) (sv); \
1179 assert(SvTYPE(_svi) >= SVt_PV); \
1180 assert(SvTYPE(_svi) != SVt_PVAV); \
1181 assert(SvTYPE(_svi) != SVt_PVHV); \
1182 assert(!isGV_with_GP(_svi)); \
1183 &(((XPV*) SvANY(_svi))->xpv_cur); \
1185 # define SvIVX(sv) \
1186 (*({ SV *const _svi = (SV *) (sv); \
1187 assert(SvTYPE(_svi) == SVt_IV || SvTYPE(_svi) >= SVt_PVIV); \
1188 assert(SvTYPE(_svi) != SVt_PVAV); \
1189 assert(SvTYPE(_svi) != SVt_PVHV); \
1190 assert(SvTYPE(_svi) != SVt_PVCV); \
1191 assert(!isGV_with_GP(_svi)); \
1192 &(((XPVIV*) SvANY(_svi))->xiv_iv); \
1194 # define SvUVX(sv) \
1195 (*({ SV *const _svi = (SV *) (sv); \
1196 assert(SvTYPE(_svi) == SVt_IV || SvTYPE(_svi) >= SVt_PVIV); \
1197 assert(SvTYPE(_svi) != SVt_PVAV); \
1198 assert(SvTYPE(_svi) != SVt_PVHV); \
1199 assert(SvTYPE(_svi) != SVt_PVCV); \
1200 assert(!isGV_with_GP(_svi)); \
1201 &(((XPVUV*) SvANY(_svi))->xuv_uv); \
1203 # define SvNVX(sv) \
1204 (*({ SV *const _svi = (SV *) (sv); \
1205 assert(SvTYPE(_svi) == SVt_NV || SvTYPE(_svi) >= SVt_PVNV); \
1206 assert(SvTYPE(_svi) != SVt_PVAV); \
1207 assert(SvTYPE(_svi) != SVt_PVHV); \
1208 assert(SvTYPE(_svi) != SVt_PVCV); \
1209 assert(SvTYPE(_svi) != SVt_PVFM); \
1210 assert(!isGV_with_GP(_svi)); \
1211 &(((XPVNV*) SvANY(_svi))->xnv_u.xnv_nv); \
1213 # define SvMAGIC(sv) \
1214 (*({ SV *const _svi = (SV *) (sv); \
1215 assert(SvTYPE(_svi) >= SVt_PVMG); \
1216 if(SvTYPE(_svi) == SVt_PVMG) \
1217 assert(!SvPAD_OUR(_svi)); \
1218 &(((XPVMG*) SvANY(_svi))->xmg_u.xmg_magic); \
1220 # define SvSTASH(sv) \
1221 (*({ SV *const _svi = (SV *) (sv); \
1222 assert(SvTYPE(_svi) >= SVt_PVMG); \
1223 &(((XPVMG*) SvANY(_svi))->xmg_stash); \
1226 # define SvPVX(sv) ((sv)->sv_u.svu_pv)
1227 # define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
1228 # define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
1229 # define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
1230 # define SvNVX(sv) ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv
1231 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic
1232 # define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
1237 /* Given that these two are new, there can't be any existing code using them
1239 # define SvPVX_mutable(sv) (0 + (sv)->sv_u.svu_pv)
1240 # define SvPVX_const(sv) ((const char*)(0 + (sv)->sv_u.svu_pv))
1242 /* Except for the poison code, which uses & to scribble over the pointer after
1243 free() is called. */
1244 # define SvPVX_mutable(sv) ((sv)->sv_u.svu_pv)
1245 # define SvPVX_const(sv) ((const char*)((sv)->sv_u.svu_pv))
1248 #define SvIVXx(sv) SvIVX(sv)
1249 #define SvUVXx(sv) SvUVX(sv)
1250 #define SvNVXx(sv) SvNVX(sv)
1251 #define SvPVXx(sv) SvPVX(sv)
1252 #define SvLENx(sv) SvLEN(sv)
1253 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
1256 /* Ask a scalar nicely to try to become an IV, if possible.
1257 Not guaranteed to stay returning void */
1258 /* Macro won't actually call sv_2iv if already IOK */
1259 #define SvIV_please(sv) \
1260 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
1261 (void) SvIV(sv); } STMT_END
1262 #define SvIV_set(sv, val) \
1263 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1264 assert(SvTYPE(sv) != SVt_PVAV); \
1265 assert(SvTYPE(sv) != SVt_PVHV); \
1266 assert(SvTYPE(sv) != SVt_PVCV); \
1267 assert(!isGV_with_GP(sv)); \
1268 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
1269 #define SvNV_set(sv, val) \
1270 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
1271 assert(SvTYPE(sv) != SVt_PVAV); assert(SvTYPE(sv) != SVt_PVHV); \
1272 assert(SvTYPE(sv) != SVt_PVCV); assert(SvTYPE(sv) != SVt_PVFM); \
1273 assert(!isGV_with_GP(sv)); \
1274 (((XPVNV*)SvANY(sv))->xnv_u.xnv_nv = (val)); } STMT_END
1275 #define SvPV_set(sv, val) \
1276 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1277 assert(SvTYPE(sv) != SVt_PVAV); \
1278 assert(SvTYPE(sv) != SVt_PVHV); \
1279 assert(!isGV_with_GP(sv)); \
1280 ((sv)->sv_u.svu_pv = (val)); } STMT_END
1281 #define SvUV_set(sv, val) \
1282 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1283 assert(SvTYPE(sv) != SVt_PVAV); \
1284 assert(SvTYPE(sv) != SVt_PVHV); \
1285 assert(SvTYPE(sv) != SVt_PVCV); \
1286 assert(!isGV_with_GP(sv)); \
1287 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
1288 #define SvRV_set(sv, val) \
1289 STMT_START { assert(SvTYPE(sv) >= SVt_RV); \
1290 assert(!isGV_with_GP(sv)); \
1291 ((sv)->sv_u.svu_rv = (val)); } STMT_END
1292 #define SvMAGIC_set(sv, val) \
1293 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1294 (((XPVMG*)SvANY(sv))->xmg_u.xmg_magic = (val)); } STMT_END
1295 #define SvSTASH_set(sv, val) \
1296 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1297 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
1298 #define SvCUR_set(sv, val) \
1299 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1300 assert(SvTYPE(sv) != SVt_PVAV); \
1301 assert(SvTYPE(sv) != SVt_PVHV); \
1302 assert(!isGV_with_GP(sv)); \
1303 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
1304 #define SvLEN_set(sv, val) \
1305 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1306 assert(SvTYPE(sv) != SVt_PVAV); \
1307 assert(SvTYPE(sv) != SVt_PVHV); \
1308 assert(!isGV_with_GP(sv)); \
1309 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
1310 #define SvEND_set(sv, val) \
1311 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1312 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
1314 #define SvPV_renew(sv,n) \
1315 STMT_START { SvLEN_set(sv, n); \
1316 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
1317 (char*)saferealloc((Malloc_t)SvPVX(sv), \
1318 (MEM_SIZE)((n))))); \
1321 #define SvPV_shrink_to_cur(sv) STMT_START { \
1322 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
1323 SvPV_renew(sv, _lEnGtH); \
1326 #define SvPV_free(sv) \
1328 assert(SvTYPE(sv) >= SVt_PV); \
1331 SvPV_set(sv, SvPVX_mutable(sv) - SvIVX(sv)); \
1332 SvFLAGS(sv) &= ~SVf_OOK; \
1334 Safefree(SvPVX(sv)); \
1339 #define PERL_FBM_TABLE_OFFSET 5 /* Number of bytes between EOS and table */
1340 #define PERL_FBM_FLAGS_OFFSET_FROM_TABLE -1
1341 /* how many characters in string before rare? */
1342 #if (BYTEORDER == 0x4321) || (BYTEORDER == 0x87654321)
1343 # define PERL_FBM_PREVIOUS_L_OFFSET_FROM_TABLE -2
1344 # define PERL_FBM_PREVIOUS_H_OFFSET_FROM_TABLE -3
1346 # define PERL_FBM_PREVIOUS_H_OFFSET_FROM_TABLE -2
1347 # define PERL_FBM_PREVIOUS_L_OFFSET_FROM_TABLE -3
1349 /* rarest character in string */
1350 #define PERL_FBM_RARE_OFFSET_FROM_TABLE -4
1352 /* SvPOKp not SvPOK in the assertion because the string can be tainted! eg
1355 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1356 # define BmRARE(sv) \
1357 (*({ SV *const uggh = (SV *) (sv); \
1358 assert(SvTYPE(uggh) == SVt_PVGV); \
1359 assert(SvVALID(uggh)); \
1360 assert(SvCUR(uggh) + PERL_FBM_TABLE_OFFSET \
1361 + PERL_FBM_RARE_OFFSET_FROM_TABLE <= SvLEN(uggh)); \
1362 assert(SvPOKp(uggh)); \
1364 + PERL_FBM_TABLE_OFFSET + PERL_FBM_RARE_OFFSET_FROM_TABLE); \
1366 # define BmUSEFUL(sv) \
1367 (*({ SV *const uggh = (SV *) (sv); \
1368 assert(SvTYPE(uggh) == SVt_PVGV); \
1369 assert(SvVALID(uggh)); \
1370 assert(!SvIOK(uggh)); \
1371 &(((XPVGV*) SvANY(uggh))->xiv_u.xivu_i32); \
1373 # define BmPREVIOUS(sv) \
1374 ({ SV *const uggh = (SV *) (sv); \
1375 assert(SvTYPE(uggh) == SVt_PVGV); \
1376 assert(SvVALID(uggh)); \
1377 assert(SvPOKp(uggh)); \
1378 assert(SvCUR(uggh) + PERL_FBM_TABLE_OFFSET <= SvLEN(uggh)); \
1379 (*(U8*)(SvEND(uggh) + PERL_FBM_TABLE_OFFSET \
1380 + PERL_FBM_PREVIOUS_H_OFFSET_FROM_TABLE) << 8) \
1381 | (*(U8*)(SvEND(uggh) + PERL_FBM_TABLE_OFFSET \
1382 + PERL_FBM_PREVIOUS_L_OFFSET_FROM_TABLE)); \
1385 # define BmRARE(sv) \
1387 + PERL_FBM_TABLE_OFFSET + PERL_FBM_RARE_OFFSET_FROM_TABLE))
1389 # define BmUSEFUL(sv) ((XPVGV*) SvANY(sv))->xiv_u.xivu_i32
1390 # define BmPREVIOUS(sv) \
1391 ((*(U8*)(SvEND(sv) + PERL_FBM_TABLE_OFFSET \
1392 + PERL_FBM_PREVIOUS_H_OFFSET_FROM_TABLE) << 8) \
1393 | (*(U8*)(SvEND(sv) + PERL_FBM_TABLE_OFFSET \
1394 + PERL_FBM_PREVIOUS_L_OFFSET_FROM_TABLE))) \
1397 #define BmPREVIOUS_set(sv, val) \
1398 STMT_START { assert(SvTYPE(sv) == SVt_PVGV); \
1399 assert(SvVALID(sv)); \
1400 assert(SvPOKp(sv)); \
1401 assert(SvCUR(sv) + PERL_FBM_TABLE_OFFSET <= SvLEN(sv)); \
1402 *(U8*)(SvEND(sv) + PERL_FBM_TABLE_OFFSET \
1403 + PERL_FBM_PREVIOUS_H_OFFSET_FROM_TABLE) = (U8)((U32)(val)>>8); \
1404 *(U8*)(SvEND(sv) + PERL_FBM_TABLE_OFFSET \
1405 + PERL_FBM_PREVIOUS_L_OFFSET_FROM_TABLE) = (U8)(val); \
1408 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
1410 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
1411 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
1412 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
1413 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
1415 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
1416 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
1417 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
1418 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
1419 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
1420 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
1421 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
1422 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
1423 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
1424 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
1425 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
1426 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
1427 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
1428 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
1429 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
1430 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1431 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1433 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
1434 #define IoTYPE_RDONLY '<'
1435 #define IoTYPE_WRONLY '>'
1436 #define IoTYPE_RDWR '+'
1437 #define IoTYPE_APPEND 'a'
1438 #define IoTYPE_PIPE '|'
1439 #define IoTYPE_STD '-' /* stdin or stdout */
1440 #define IoTYPE_SOCKET 's'
1441 #define IoTYPE_CLOSED ' '
1442 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1443 #define IoTYPE_NUMERIC '#' /* fdopen */
1446 =for apidoc Am|bool|SvTAINTED|SV* sv
1447 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
1450 =for apidoc Am|void|SvTAINTED_on|SV* sv
1451 Marks an SV as tainted if tainting is enabled.
1453 =for apidoc Am|void|SvTAINTED_off|SV* sv
1454 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1455 some of Perl's fundamental security features. XS module authors should not
1456 use this function unless they fully understand all the implications of
1457 unconditionally untainting the value. Untainting should be done in the
1458 standard perl fashion, via a carefully crafted regexp, rather than directly
1459 untainting variables.
1461 =for apidoc Am|void|SvTAINT|SV* sv
1462 Taints an SV if tainting is enabled.
1467 #define sv_taint(sv) sv_magic((sv), NULL, PERL_MAGIC_taint, NULL, 0)
1469 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1470 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
1471 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
1473 #define SvTAINT(sv) \
1475 if (PL_tainting) { \
1482 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
1483 Like C<SvPV> but will force the SV into containing just a string
1484 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1487 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
1488 Like C<SvPV> but will force the SV into containing just a string
1489 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1490 directly. Doesn't process magic.
1492 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
1493 Returns a pointer to the string in the SV, or a stringified form of
1494 the SV if the SV does not contain a string. The SV may cache the
1495 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
1496 C<SvPVx> for a version which guarantees to evaluate sv only once.
1498 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
1499 A version of C<SvPV> which guarantees to evaluate sv only once.
1501 =for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1502 Like C<SvPV> but doesn't process magic.
1504 =for apidoc Am|char*|SvPV_nolen|SV* sv
1505 Returns a pointer to the string in the SV, or a stringified form of
1506 the SV if the SV does not contain a string. The SV may cache the
1507 stringified form becoming C<SvPOK>. Handles 'get' magic.
1509 =for apidoc Am|IV|SvIV|SV* sv
1510 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
1511 version which guarantees to evaluate sv only once.
1513 =for apidoc Am|IV|SvIV_nomg|SV* sv
1514 Like C<SvIV> but doesn't process magic.
1516 =for apidoc Am|IV|SvIVx|SV* sv
1517 Coerces the given SV to an integer and returns it. Guarantees to evaluate
1518 sv only once. Use the more efficient C<SvIV> otherwise.
1520 =for apidoc Am|NV|SvNV|SV* sv
1521 Coerce the given SV to a double and return it. See C<SvNVx> for a version
1522 which guarantees to evaluate sv only once.
1524 =for apidoc Am|NV|SvNVx|SV* sv
1525 Coerces the given SV to a double and returns it. Guarantees to evaluate
1526 sv only once. Use the more efficient C<SvNV> otherwise.
1528 =for apidoc Am|UV|SvUV|SV* sv
1529 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
1530 for a version which guarantees to evaluate sv only once.
1532 =for apidoc Am|UV|SvUV_nomg|SV* sv
1533 Like C<SvUV> but doesn't process magic.
1535 =for apidoc Am|UV|SvUVx|SV* sv
1536 Coerces the given SV to an unsigned integer and returns it. Guarantees to
1537 evaluate sv only once. Use the more efficient C<SvUV> otherwise.
1539 =for apidoc Am|bool|SvTRUE|SV* sv
1540 Returns a boolean indicating whether Perl would evaluate the SV as true or
1541 false, defined or undefined. Does not handle 'get' magic.
1543 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
1544 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1546 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
1547 Like C<SvPV>, but converts sv to utf8 first if necessary.
1549 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1550 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
1552 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1553 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1555 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1556 Like C<SvPV>, but converts sv to byte representation first if necessary.
1558 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1559 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1561 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1562 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1563 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1566 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1567 Like C<SvPV>, but converts sv to utf8 first if necessary.
1568 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1571 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1572 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1573 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1576 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1577 Like C<SvPV>, but converts sv to byte representation first if necessary.
1578 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1581 =for apidoc Am|bool|SvIsCOW|SV* sv
1582 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1583 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1586 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1587 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1590 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1591 Like C<sv_catpvn> but doesn't process magic.
1593 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1594 Like C<sv_setsv> but doesn't process magic.
1596 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1597 Like C<sv_catsv> but doesn't process magic.
1602 /* Let us hope that bitmaps for UV and IV are the same */
1603 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1604 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1605 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1607 #define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1608 #define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1612 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1613 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1614 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1616 #define SvPV_flags(sv, lp, flags) \
1617 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1618 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1619 #define SvPV_flags_const(sv, lp, flags) \
1620 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1621 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1622 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1623 #define SvPV_flags_const_nolen(sv, flags) \
1624 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1625 ? SvPVX_const(sv) : \
1626 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN))
1627 #define SvPV_flags_mutable(sv, lp, flags) \
1628 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1629 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1630 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1632 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1633 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1634 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1636 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1637 #define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
1639 #define SvPV_force_flags(sv, lp, flags) \
1640 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1641 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1642 #define SvPV_force_flags_nolen(sv, flags) \
1643 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1644 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1645 #define SvPV_force_flags_mutable(sv, lp, flags) \
1646 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1647 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1648 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1650 #define SvPV_nolen(sv) \
1651 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1652 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1654 #define SvPV_nolen_const(sv) \
1655 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1656 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1658 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1659 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1660 #define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
1664 #define SvPVutf8(sv, lp) \
1665 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1666 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1668 #define SvPVutf8_force(sv, lp) \
1669 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1670 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1673 #define SvPVutf8_nolen(sv) \
1674 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1675 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1679 #define SvPVbyte(sv, lp) \
1680 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1681 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1683 #define SvPVbyte_force(sv, lp) \
1684 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1685 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1687 #define SvPVbyte_nolen(sv) \
1688 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1689 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1693 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1694 * var to evaluate the arg once; failing that, use a global if possible;
1695 * failing that, call a function to do the work
1698 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1699 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1700 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1702 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1704 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1705 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1706 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1707 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1708 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1709 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1710 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1711 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1712 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1713 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1714 # define SvTRUE(sv) ( \
1718 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1720 (nxpv->xpv_cur > 1 || \
1721 (nxpv->xpv_cur && *(sv)->sv_u.svu_pv != '0')); }) \
1728 ? SvNVX(sv) != 0.0 \
1730 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1732 #else /* __GNUC__ */
1734 /* These inlined macros use globals, which will require a thread
1735 * declaration in user code, so we avoid them under threads */
1737 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1738 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1739 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1740 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1741 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1742 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1743 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1744 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1745 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1746 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1747 # define SvTRUE(sv) ( \
1751 ? ((PL_Xpv = (XPV*)SvANY(PL_Sv = (sv))) && \
1752 (PL_Xpv->xpv_cur > 1 || \
1753 (PL_Xpv->xpv_cur && *PL_Sv->sv_u.svu_pv != '0')) \
1760 ? SvNVX(sv) != 0.0 \
1762 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1763 #endif /* __GNU__ */
1765 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1766 (SVf_FAKE | SVf_READONLY))
1767 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1769 #define SvSHARED_HEK_FROM_PV(pvx) \
1770 ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
1771 #define SvSHARED_HASH(sv) (0 + SvSHARED_HEK_FROM_PV(SvPVX_const(sv))->hek_hash)
1773 /* flag values for sv_*_flags functions */
1774 #define SV_IMMEDIATE_UNREF 1
1776 #define SV_COW_DROP_PV 4
1777 #define SV_UTF8_NO_ENCODING 8
1778 #define SV_NOSTEAL 16
1779 #define SV_CONST_RETURN 32
1780 #define SV_MUTABLE_RETURN 64
1781 #define SV_SMAGIC 128
1782 #define SV_HAS_TRAILING_NUL 256
1783 #define SV_COW_SHARED_HASH_KEYS 512
1785 /* The core is safe for this COW optimisation. XS code on CPAN may not be.
1786 So only default to doing the COW setup if we're in the core.
1789 # ifndef SV_DO_COW_SVSETSV
1790 # define SV_DO_COW_SVSETSV SV_COW_SHARED_HASH_KEYS
1794 #ifndef SV_DO_COW_SVSETSV
1795 # define SV_DO_COW_SVSETSV 0
1799 #define sv_unref(sv) sv_unref_flags(sv, 0)
1800 #define sv_force_normal(sv) sv_force_normal_flags(sv, 0)
1801 #define sv_usepvn(sv, p, l) sv_usepvn_flags(sv, p, l, 0)
1802 #define sv_usepvn_mg(sv, p, l) sv_usepvn_flags(sv, p, l, SV_SMAGIC)
1804 /* We are about to replace the SV's current value. So if it's copy on write
1805 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1806 the value is about to get thrown away, so drop the PV rather than go to
1807 the effort of making a read-write copy only for it to get immediately
1810 #define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1811 sv_force_normal_flags(sv, SV_COW_DROP_PV)
1813 #ifdef PERL_OLD_COPY_ON_WRITE
1814 # define SvRELEASE_IVX(sv) ((void)((SvFLAGS(sv) & (SVf_OOK|SVf_READONLY|SVf_FAKE)) \
1815 && Perl_sv_release_IVX(aTHX_ sv)))
1816 # define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
1818 # define SvRELEASE_IVX(sv) SvOOK_off(sv)
1819 #endif /* PERL_OLD_COPY_ON_WRITE */
1821 #define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1822 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1823 SVf_OOK|SVf_BREAK|SVf_READONLY)
1824 #define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1826 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1827 sv_force_normal_flags(sv, 0)
1830 /* all these 'functions' are now just macros */
1832 #define sv_pv(sv) SvPV_nolen(sv)
1833 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1834 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1836 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1837 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1838 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1839 #define sv_setsv(dsv, ssv) \
1840 sv_setsv_flags(dsv, ssv, SV_GMAGIC|SV_DO_COW_SVSETSV)
1841 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_DO_COW_SVSETSV)
1842 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1843 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1844 #define sv_catsv_mg(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC|SV_SMAGIC)
1845 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1846 #define sv_catpvn_mg(sv, sstr, slen) \
1847 sv_catpvn_flags(sv, sstr, slen, SV_GMAGIC|SV_SMAGIC);
1848 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1849 #define sv_2pv_nolen(sv) sv_2pv(sv, 0)
1850 #define sv_2pvbyte_nolen(sv) sv_2pvbyte(sv, 0)
1851 #define sv_2pvutf8_nolen(sv) sv_2pvutf8(sv, 0)
1852 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1853 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1854 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1855 #define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1856 #define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
1858 /* Should be named SvCatPVN_utf8_upgrade? */
1859 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1862 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1864 sv_setpvn(nsv, sstr, slen); \
1866 sv_utf8_upgrade(nsv); \
1867 sv_catsv(dsv, nsv); \
1871 =for apidoc Am|SV*|newRV_inc|SV* sv
1873 Creates an RV wrapper for an SV. The reference count for the original SV is
1879 #define newRV_inc(sv) newRV(sv)
1881 /* the following macros update any magic values this sv is associated with */
1884 =head1 Magical Functions
1886 =for apidoc Am|void|SvGETMAGIC|SV* sv
1887 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1888 argument more than once.
1890 =for apidoc Am|void|SvSETMAGIC|SV* sv
1891 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1892 argument more than once.
1894 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1895 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1898 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1899 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1900 ssv. May evaluate arguments more than once.
1902 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1903 Like C<SvSetSV>, but does any set magic required afterwards.
1905 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1906 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1908 =for apidoc Am|void|SvSHARE|SV* sv
1909 Arranges for sv to be shared between threads if a suitable module
1912 =for apidoc Am|void|SvLOCK|SV* sv
1913 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1916 =for apidoc Am|void|SvUNLOCK|SV* sv
1917 Releases a mutual exclusion lock on sv if a suitable module
1920 =head1 SV Manipulation Functions
1922 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1923 Expands the character buffer in the SV so that it has room for the
1924 indicated number of bytes (remember to reserve space for an extra trailing
1925 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1926 Returns a pointer to the character buffer.
1931 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1932 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1933 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1935 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1936 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1938 #define SvSetSV_and(dst,src,finally) \
1940 if ((dst) != (src)) { \
1941 sv_setsv(dst, src); \
1945 #define SvSetSV_nosteal_and(dst,src,finally) \
1947 if ((dst) != (src)) { \
1948 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL | SV_DO_COW_SVSETSV); \
1953 #define SvSetSV(dst,src) \
1954 SvSetSV_and(dst,src,/*nothing*/;)
1955 #define SvSetSV_nosteal(dst,src) \
1956 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1958 #define SvSetMagicSV(dst,src) \
1959 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1960 #define SvSetMagicSV_nosteal(dst,src) \
1961 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1964 #if !defined(SKIP_DEBUGGING)
1965 #define SvPEEK(sv) sv_peek(sv)
1967 #define SvPEEK(sv) ""
1970 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1972 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1974 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1975 /* If I give every macro argument a different name, then there won't be bugs
1976 where nested macros get confused. Been there, done that. */
1977 #define isGV_with_GP(pwadak) \
1978 (((SvFLAGS(pwadak) & (SVp_POK|SVpgv_GP)) == SVpgv_GP) \
1979 && (SvTYPE(pwadak) == SVt_PVGV || SvTYPE(pwadak) == SVt_PVLV))
1980 #define isGV_with_GP_on(sv) STMT_START { \
1981 GV *const uggh = (GV*) sv; \
1982 assert (SvTYPE(uggh) == SVt_PVGV || SvTYPE(uggh) == SVt_PVLV); \
1983 assert (!SvPOKp(uggh)); \
1984 assert (!SvIOKp(uggh)); \
1985 (SvFLAGS(uggh) |= SVpgv_GP); \
1987 #define isGV_with_GP_off(sv) STMT_START { \
1988 GV *const uggh = (GV *) sv; \
1989 assert (SvTYPE(uggh) == SVt_PVGV || SvTYPE(uggh) == SVt_PVLV); \
1990 assert (!SvPOKp(uggh)); \
1991 assert (!SvIOKp(uggh)); \
1992 (SvFLAGS(sv) &= ~SVpgv_GP); \
1996 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1997 #define SvGROW_mutable(sv,len) \
1998 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
1999 #define Sv_Grow sv_grow
2001 #define CLONEf_COPY_STACKS 1
2002 #define CLONEf_KEEP_PTR_TABLE 2
2003 #define CLONEf_CLONE_HOST 4
2004 #define CLONEf_JOIN_IN 8
2006 struct clone_params {
2009 PerlInterpreter *proto_perl;
2014 * c-indentation-style: bsd
2016 * indent-tabs-mode: t
2019 * ex: set ts=8 sts=4 sw=4 noet: