3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 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>.
51 /* RV was here, before it was merged with IV. */
57 /* PVBM was here, before BIND replaced it. */
65 SVt_LAST /* keep last in enum. used to size arrays */
69 /* Although Fast Boyer Moore tables are now being stored in PVGVs, for most
70 purposes eternal code wanting to consider PVBM probably needs to think of
72 # define SVt_PVBM SVt_PVMG
73 /* Anything wanting to create a reference from clean should ensure that it has
74 a scalar of type SVt_IV now: */
75 # define SVt_RV SVt_IV
78 /* There is collusion here with sv_clear - sv_clear exits early for SVt_NULL
79 and SVt_IV, so never reaches the clause at the end that uses
80 sv_type_details->body_size to determine whether to call safefree(). Hence
81 body_size can be set no-zero to record the size of PTEs and HEs, without
82 fear of bogus frees. */
84 #define PTE_SVSLOT SVt_IV
86 #if defined(PERL_IN_HV_C) || defined(PERL_IN_XS_APITEST)
87 #define HE_SVSLOT SVt_NULL
90 #define PERL_ARENA_ROOTS_SIZE (SVt_LAST)
92 /* typedefs to eliminate some typing */
94 typedef struct hek HEK;
96 /* Using C's structural equivalence to help emulate C++ inheritance here... */
98 /* start with 2 sv-head building blocks */
99 #define _SV_HEAD(ptrtype) \
100 ptrtype sv_any; /* pointer to body */ \
101 U32 sv_refcnt; /* how many references to us */ \
102 U32 sv_flags /* what we are */
104 #define _SV_HEAD_UNION \
108 SV* svu_rv; /* pointer to another SV */ \
109 char* svu_pv; /* pointer to malloced string */ \
116 struct STRUCT_SV { /* struct sv { */
119 #ifdef DEBUG_LEAKING_SCALARS
120 PERL_BITFIELD32 sv_debug_optype:9; /* the type of OP that allocated us */
121 PERL_BITFIELD32 sv_debug_inpad:1; /* was allocated in a pad for an OP */
122 PERL_BITFIELD32 sv_debug_cloned:1; /* was cloned for an ithread */
123 PERL_BITFIELD32 sv_debug_line:16; /* the line where we were allocated */
124 char * sv_debug_file; /* the file where we were allocated */
129 _SV_HEAD(XPVGV*); /* pointer to xpvgv body */
134 _SV_HEAD(XPVCV*); /* pointer to xpvcv body */
139 _SV_HEAD(XPVAV*); /* pointer to xpvav body */
144 _SV_HEAD(XPVHV*); /* pointer to xpvhv body */
149 _SV_HEAD(XPVIO*); /* pointer to xpvio body */
154 _SV_HEAD(struct regexp*); /* pointer to regexp body */
159 #undef _SV_HEAD_UNION /* ensure no pollution */
162 =head1 SV Manipulation Functions
164 =for apidoc Am|U32|SvREFCNT|SV* sv
165 Returns the value of the object's reference count.
167 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
168 Increments the reference count of the given SV.
170 All of the following SvREFCNT_inc* macros are optimized versions of
171 SvREFCNT_inc, and can be replaced with SvREFCNT_inc.
173 =for apidoc Am|SV*|SvREFCNT_inc_NN|SV* sv
174 Same as SvREFCNT_inc, but can only be used if you know I<sv>
175 is not NULL. Since we don't have to check the NULLness, it's faster
178 =for apidoc Am|void|SvREFCNT_inc_void|SV* sv
179 Same as SvREFCNT_inc, but can only be used if you don't need the
180 return value. The macro doesn't need to return a meaningful value.
182 =for apidoc Am|void|SvREFCNT_inc_void_NN|SV* sv
183 Same as SvREFCNT_inc, but can only be used if you don't need the return
184 value, and you know that I<sv> is not NULL. The macro doesn't need
185 to return a meaningful value, or check for NULLness, so it's smaller
188 =for apidoc Am|SV*|SvREFCNT_inc_simple|SV* sv
189 Same as SvREFCNT_inc, but can only be used with expressions without side
190 effects. Since we don't have to store a temporary value, it's faster.
192 =for apidoc Am|SV*|SvREFCNT_inc_simple_NN|SV* sv
193 Same as SvREFCNT_inc_simple, but can only be used if you know I<sv>
194 is not NULL. Since we don't have to check the NULLness, it's faster
197 =for apidoc Am|void|SvREFCNT_inc_simple_void|SV* sv
198 Same as SvREFCNT_inc_simple, but can only be used if you don't need the
199 return value. The macro doesn't need to return a meaningful value.
201 =for apidoc Am|void|SvREFCNT_inc_simple_void_NN|SV* sv
202 Same as SvREFCNT_inc, but can only be used if you don't need the return
203 value, and you know that I<sv> is not NULL. The macro doesn't need
204 to return a meaningful value, or check for NULLness, so it's smaller
207 =for apidoc Am|void|SvREFCNT_dec|SV* sv
208 Decrements the reference count of the given SV.
210 =for apidoc Am|svtype|SvTYPE|SV* sv
211 Returns the type of the SV. See C<svtype>.
213 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
214 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
215 perform the upgrade if necessary. See C<svtype>.
220 #define SvANY(sv) (sv)->sv_any
221 #define SvFLAGS(sv) (sv)->sv_flags
222 #define SvREFCNT(sv) (sv)->sv_refcnt
224 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
225 # define SvREFCNT_inc(sv) \
227 SV * const _sv = (SV*)(sv); \
232 # define SvREFCNT_inc_simple(sv) \
238 # define SvREFCNT_inc_NN(sv) \
240 SV * const _sv = (SV*)(sv); \
244 # define SvREFCNT_inc_void(sv) \
246 SV * const _sv = (SV*)(sv); \
248 (void)(SvREFCNT(_sv)++); \
251 # define SvREFCNT_inc(sv) \
252 ((PL_Sv=(SV*)(sv)) ? (++(SvREFCNT(PL_Sv)),PL_Sv) : NULL)
253 # define SvREFCNT_inc_simple(sv) \
254 ((sv) ? (SvREFCNT(sv)++,(SV*)(sv)) : NULL)
255 # define SvREFCNT_inc_NN(sv) \
256 (PL_Sv=(SV*)(sv),++(SvREFCNT(PL_Sv)),PL_Sv)
257 # define SvREFCNT_inc_void(sv) \
258 (void)((PL_Sv=(SV*)(sv)) ? ++(SvREFCNT(PL_Sv)) : 0)
261 /* These guys don't need the curly blocks */
262 #define SvREFCNT_inc_simple_void(sv) STMT_START { if (sv) SvREFCNT(sv)++; } STMT_END
263 #define SvREFCNT_inc_simple_NN(sv) (++(SvREFCNT(sv)),(SV*)(sv))
264 #define SvREFCNT_inc_void_NN(sv) (void)(++SvREFCNT((SV*)(sv)))
265 #define SvREFCNT_inc_simple_void_NN(sv) (void)(++SvREFCNT((SV*)(sv)))
267 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
268 # define SvREFCNT_dec(sv) \
270 SV * const _sv = (SV*)(sv); \
272 if (SvREFCNT(_sv)) { \
273 if (--(SvREFCNT(_sv)) == 0) \
274 Perl_sv_free2(aTHX_ _sv); \
281 #define SvREFCNT_dec(sv) sv_free((SV*)(sv))
284 #define SVTYPEMASK 0xff
285 #define SvTYPE(sv) ((svtype)((sv)->sv_flags & SVTYPEMASK))
287 /* Sadly there are some parts of the core that have pointers to already-freed
288 SV heads, and rely on being able to tell that they are now free. So mark
289 them all by using a consistent macro. */
290 #define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
292 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= (mt) || (sv_upgrade(sv, mt), 1))
294 #define SVf_IOK 0x00000100 /* has valid public integer value */
295 #define SVf_NOK 0x00000200 /* has valid public numeric value */
296 #define SVf_POK 0x00000400 /* has valid public pointer value */
297 #define SVf_ROK 0x00000800 /* has a valid reference pointer */
299 #define SVp_IOK 0x00001000 /* has valid non-public integer value */
300 #define SVp_NOK 0x00002000 /* has valid non-public numeric value */
301 #define SVp_POK 0x00004000 /* has valid non-public pointer value */
302 #define SVp_SCREAM 0x00008000 /* has been studied? */
303 #define SVphv_CLONEABLE SVp_SCREAM /* PVHV (stashes) clone its objects */
304 #define SVpgv_GP SVp_SCREAM /* GV has a valid GP */
305 #define SVprv_PCS_IMPORTED SVp_SCREAM /* RV is a proxy for a constant
306 subroutine in another package. Set the
307 CvIMPORTED_CV_ON() if it needs to be
308 expanded to a real GV */
310 #define SVs_PADSTALE 0x00010000 /* lexical has gone out of scope */
311 #define SVpad_STATE 0x00010000 /* pad name is a "state" var */
312 #define SVs_PADTMP 0x00020000 /* in use as tmp */
313 #define SVpad_TYPED 0x00020000 /* pad name is a Typed Lexical */
314 #define SVs_PADMY 0x00040000 /* in use a "my" variable */
315 #define SVpad_OUR 0x00040000 /* pad name is "our" instead of "my" */
316 #define SVs_TEMP 0x00080000 /* string is stealable? */
317 #define SVs_OBJECT 0x00100000 /* is "blessed" */
318 #define SVs_GMG 0x00200000 /* has magical get method */
319 #define SVs_SMG 0x00400000 /* has magical set method */
320 #define SVs_RMG 0x00800000 /* has random magical methods */
322 #define SVf_FAKE 0x01000000 /* 0: glob or lexical is just a copy
323 1: SV head arena wasn't malloc()ed
324 2: in conjunction with SVf_READONLY
325 marks a shared hash key scalar
326 (SvLEN == 0) or a copy on write
327 string (SvLEN != 0) [SvIsCOW(sv)]
328 3: For PVCV, whether CvUNIQUE(cv)
329 refers to an eval or once only
330 [CvEVAL(cv), CvSPECIAL(cv)]
331 4: On a pad name SV, that slot in the
332 frame AV is a REFCNT'ed reference
333 to a lexical from "outside". */
334 #define SVphv_REHASH SVf_FAKE /* 5: On a PVHV, hash values are being
336 #define SVf_OOK 0x02000000 /* has valid offset value. For a PVHV this
337 means that a hv_aux struct is present
338 after the main array */
339 #define SVf_BREAK 0x04000000 /* refcnt is artificially low - used by
340 SVs in final arena cleanup.
341 Set in S_regtry on PL_reg_curpm, so that
342 perl_destruct will skip it. */
343 #define SVf_READONLY 0x08000000 /* may not be modified */
348 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
350 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
351 SVp_IOK|SVp_NOK|SVp_POK|SVpgv_GP)
353 #define PRIVSHIFT 4 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
355 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
357 /* Ensure this value does not clash with the GV_ADD* flags in gv.h: */
358 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded
359 This is also set on RVs whose overloaded
360 stringification is UTF-8. This might
361 only happen as a side effect of SvPV() */
364 /* Some private flags. */
366 /* PVAV could probably use 0x2000000 without conflict. I assume that PVFM can
367 be UTF-8 encoded, and PVCVs could well have UTF-8 prototypes. PVIOs haven't
368 been restructured, so sometimes get used as string buffers. */
371 #define SVphv_SHAREKEYS 0x20000000 /* PVHV keys live on shared string table */
372 /* PVNV, PVMG, presumably only inside pads */
373 #define SVpad_NAME 0x40000000 /* This SV is a name in the PAD, so
374 SVpad_TYPED, SVpad_OUR and SVpad_STATE
377 #define SVpav_REAL 0x40000000 /* free old entries */
379 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
380 /* This is only set true on a PVGV when it's playing "PVBM", but is tested for
381 on any regular scalar (anything <= PVLV) */
382 #define SVpbm_VALID 0x40000000
384 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
386 /* IV, PVIV, PVNV, PVMG, PVGV and (I assume) PVLV */
387 /* Presumably IVs aren't stored in pads */
388 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
390 #define SVpav_REIFY 0x80000000 /* can become real */
392 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
394 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
395 /* PVGV when SVpbm_VALID is true */
396 #define SVpbm_TAIL 0x80000000
397 /* RV upwards. However, SVf_ROK and SVp_IOK are exclusive */
398 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
400 #define _XPV_ALLOCATED_HEAD \
401 STRLEN xpv_cur; /* length of svu_pv as a C string */ \
402 STRLEN xpv_len /* allocated size */
409 NV xnv_nv; /* numeric value, if any */
414 } xpad_cop_seq; /* used by pad.c for cop_sequence */
416 U32 xbm_previous; /* how many characters in string before rare? */
418 U8 xbm_rare; /* rarest character in string */
419 } xbm_s; /* fields from PVBM */
423 IV xivu_iv; /* integer value */
424 /* xpvfm: pv offset */
428 HEK * xivu_namehek; /* xpvlv, xpvgv: GvNAME */
429 HV * xivu_hv; /* regexp: paren_names */
433 MAGIC* xmg_magic; /* linked list of magicalness */
434 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
455 #define xiv_iv xiv_u.xivu_iv
462 #define xuv_uv xuv_u.xivu_uv
469 #define _XPVMG_HEAD \
472 HV* xmg_stash /* class package */
474 /* These structure must match the beginning of struct xpvhv in hv.h. */
487 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
488 * y=alem/helem/iter t=tie T=tied HE */
491 /* This structure works in 3 ways - regular scalar, GV with GP, or fast
498 /* This structure must match XPVCV in cv.h */
500 typedef U16 cv_flags_t;
502 #define _XPVCV_COMMON \
510 void (*xcv_xsub) (pTHX_ CV*); \
516 U32 xcv_outside_seq; /* the COP sequence (at the point of our \
517 * compilation) in the lexically enclosing \
535 #define _XPVIO_TAIL \
536 PerlIO * xio_ifp; /* ifp and ofp are normally the same */ \
537 PerlIO * xio_ofp; /* but sockets need separate streams */ \
538 /* Cray addresses everything by word boundaries (64 bits) and \
539 * code and data pointers cannot be mixed (which is exactly what \
540 * Perl_filter_add() tries to do with the dirp), hence the \
541 * following union trick (as suggested by Gurusamy Sarathy). \
542 * For further information see Geir Johansen's problem report \
543 * titled [ID 20000612.002] Perl problem on Cray system \
544 * The any pointer (known as IoANY()) will also be a good place \
545 * to hang any IO disciplines to. \
548 DIR * xiou_dirp; /* for opendir, readdir, etc */ \
549 void * xiou_any; /* for alignment */ \
551 IV xio_lines; /* $. */ \
552 IV xio_page; /* $% */ \
553 IV xio_page_len; /* $= */ \
554 IV xio_lines_left; /* $- */ \
555 char * xio_top_name; /* $^ */ \
556 GV * xio_top_gv; /* $^ */ \
557 char * xio_fmt_name; /* $~ */ \
558 GV * xio_fmt_gv; /* $~ */ \
559 char * xio_bottom_name;/* $^B */ \
560 GV * xio_bottom_gv; /* $^B */ \
577 #define xio_dirp xio_dirpu.xiou_dirp
578 #define xio_any xio_dirpu.xiou_any
580 #define IOf_ARGV 1 /* this fp iterates over ARGV */
581 #define IOf_START 2 /* check for null ARGV and substitute '-' */
582 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
583 #define IOf_DIDTOP 8 /* just did top of form */
584 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
585 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
586 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
588 /* The following macros define implementation-independent predicates on SVs. */
591 =for apidoc Am|U32|SvNIOK|SV* sv
592 Returns a U32 value indicating whether the SV contains a number, integer or
595 =for apidoc Am|U32|SvNIOKp|SV* sv
596 Returns a U32 value indicating whether the SV contains a number, integer or
597 double. Checks the B<private> setting. Use C<SvNIOK>.
599 =for apidoc Am|void|SvNIOK_off|SV* sv
600 Unsets the NV/IV status of an SV.
602 =for apidoc Am|U32|SvOK|SV* sv
603 Returns a U32 value indicating whether the value is an SV. It also tells
604 whether the value is defined or not.
606 =for apidoc Am|U32|SvIOKp|SV* sv
607 Returns a U32 value indicating whether the SV contains an integer. Checks
608 the B<private> setting. Use C<SvIOK>.
610 =for apidoc Am|U32|SvNOKp|SV* sv
611 Returns a U32 value indicating whether the SV contains a double. Checks the
612 B<private> setting. Use C<SvNOK>.
614 =for apidoc Am|U32|SvPOKp|SV* sv
615 Returns a U32 value indicating whether the SV contains a character string.
616 Checks the B<private> setting. Use C<SvPOK>.
618 =for apidoc Am|U32|SvIOK|SV* sv
619 Returns a U32 value indicating whether the SV contains an integer.
621 =for apidoc Am|void|SvIOK_on|SV* sv
622 Tells an SV that it is an integer.
624 =for apidoc Am|void|SvIOK_off|SV* sv
625 Unsets the IV status of an SV.
627 =for apidoc Am|void|SvIOK_only|SV* sv
628 Tells an SV that it is an integer and disables all other OK bits.
630 =for apidoc Am|void|SvIOK_only_UV|SV* sv
631 Tells and SV that it is an unsigned integer and disables all other OK bits.
633 =for apidoc Am|bool|SvIOK_UV|SV* sv
634 Returns a boolean indicating whether the SV contains an unsigned integer.
636 =for apidoc Am|bool|SvUOK|SV* sv
637 Returns a boolean indicating whether the SV contains an unsigned integer.
639 =for apidoc Am|bool|SvIOK_notUV|SV* sv
640 Returns a boolean indicating whether the SV contains a signed integer.
642 =for apidoc Am|U32|SvNOK|SV* sv
643 Returns a U32 value indicating whether the SV contains a double.
645 =for apidoc Am|void|SvNOK_on|SV* sv
646 Tells an SV that it is a double.
648 =for apidoc Am|void|SvNOK_off|SV* sv
649 Unsets the NV status of an SV.
651 =for apidoc Am|void|SvNOK_only|SV* sv
652 Tells an SV that it is a double and disables all other OK bits.
654 =for apidoc Am|U32|SvPOK|SV* sv
655 Returns a U32 value indicating whether the SV contains a character
658 =for apidoc Am|void|SvPOK_on|SV* sv
659 Tells an SV that it is a string.
661 =for apidoc Am|void|SvPOK_off|SV* sv
662 Unsets the PV status of an SV.
664 =for apidoc Am|void|SvPOK_only|SV* sv
665 Tells an SV that it is a string and disables all other OK bits.
666 Will also turn off the UTF-8 status.
668 =for apidoc Am|bool|SvVOK|SV* sv
669 Returns a boolean indicating whether the SV contains a v-string.
671 =for apidoc Am|U32|SvOOK|SV* sv
672 Returns a U32 indicating whether the pointer to the string buffer is offset.
673 This hack is used internally to speed up removal of characters from the
674 beginning of a SvPV. When SvOOK is true, then the start of the
675 allocated string buffer is actually C<SvOOK_offset()> bytes before SvPVX.
676 This offset used to be stored in SvIVX, but is now stored within the spare
679 =for apidoc Am|U32|SvROK|SV* sv
680 Tests if the SV is an RV.
682 =for apidoc Am|void|SvROK_on|SV* sv
683 Tells an SV that it is an RV.
685 =for apidoc Am|void|SvROK_off|SV* sv
686 Unsets the RV status of an SV.
688 =for apidoc Am|SV*|SvRV|SV* sv
689 Dereferences an RV to return the SV.
691 =for apidoc Am|IV|SvIVX|SV* sv
692 Returns the raw value in the SV's IV slot, without checks or conversions.
693 Only use when you are sure SvIOK is true. See also C<SvIV()>.
695 =for apidoc Am|UV|SvUVX|SV* sv
696 Returns the raw value in the SV's UV slot, without checks or conversions.
697 Only use when you are sure SvIOK is true. See also C<SvUV()>.
699 =for apidoc Am|NV|SvNVX|SV* sv
700 Returns the raw value in the SV's NV slot, without checks or conversions.
701 Only use when you are sure SvNOK is true. See also C<SvNV()>.
703 =for apidoc Am|char*|SvPVX|SV* sv
704 Returns a pointer to the physical string in the SV. The SV must contain a
707 =for apidoc Am|STRLEN|SvCUR|SV* sv
708 Returns the length of the string which is in the SV. See C<SvLEN>.
710 =for apidoc Am|STRLEN|SvLEN|SV* sv
711 Returns the size of the string buffer in the SV, not including any part
712 attributable to C<SvOOK>. See C<SvCUR>.
714 =for apidoc Am|char*|SvEND|SV* sv
715 Returns a pointer to the last character in the string which is in the SV.
716 See C<SvCUR>. Access the character as *(SvEND(sv)).
718 =for apidoc Am|HV*|SvSTASH|SV* sv
719 Returns the stash of the SV.
721 =for apidoc Am|void|SvIV_set|SV* sv|IV val
722 Set the value of the IV pointer in sv to val. It is possible to perform
723 the same function of this macro with an lvalue assignment to C<SvIVX>.
724 With future Perls, however, it will be more efficient to use
725 C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
727 =for apidoc Am|void|SvNV_set|SV* sv|NV val
728 Set the value of the NV pointer in sv to val. See C<SvIV_set>.
730 =for apidoc Am|void|SvPV_set|SV* sv|char* val
731 Set the value of the PV pointer in sv to val. See C<SvIV_set>.
733 =for apidoc Am|void|SvUV_set|SV* sv|UV val
734 Set the value of the UV pointer in sv to val. See C<SvIV_set>.
736 =for apidoc Am|void|SvRV_set|SV* sv|SV* val
737 Set the value of the RV pointer in sv to val. See C<SvIV_set>.
739 =for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
740 Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>.
742 =for apidoc Am|void|SvSTASH_set|SV* sv|HV* val
743 Set the value of the STASH pointer in sv to val. See C<SvIV_set>.
745 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
746 Set the current length of the string which is in the SV. See C<SvCUR>
749 =for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
750 Set the actual length of the string which is in the SV. See C<SvIV_set>.
755 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
756 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
757 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
758 SVp_IOK|SVp_NOK|SVf_IVisUV))
760 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
761 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
762 #define assert_not_glob(sv) ({assert(!isGV_with_GP(sv));}),
764 #define assert_not_ROK(sv)
765 #define assert_not_glob(sv)
768 #define SvOK(sv) ((SvTYPE(sv) == SVt_BIND) \
769 ? (SvFLAGS(SvRV(sv)) & SVf_OK) \
770 : (SvFLAGS(sv) & SVf_OK))
771 #define SvOK_off(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
772 SvFLAGS(sv) &= ~(SVf_OK| \
773 SVf_IVisUV|SVf_UTF8), \
775 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
776 SvFLAGS(sv) &= ~(SVf_OK| \
780 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
781 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
782 #define SvIOKp_on(sv) (assert_not_glob(sv) SvRELEASE_IVX_(sv) \
783 SvFLAGS(sv) |= SVp_IOK)
784 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
785 #define SvNOKp_on(sv) (assert_not_glob(sv) SvFLAGS(sv) |= SVp_NOK)
786 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
787 #define SvPOKp_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
788 SvFLAGS(sv) |= SVp_POK)
790 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
791 #define SvIOK_on(sv) (assert_not_glob(sv) SvRELEASE_IVX_(sv) \
792 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
793 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
794 #define SvIOK_only(sv) (SvOK_off(sv), \
795 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
796 #define SvIOK_only_UV(sv) (assert_not_glob(sv) SvOK_off_exc_UV(sv), \
797 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
799 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
800 == (SVf_IOK|SVf_IVisUV))
801 #define SvUOK(sv) SvIOK_UV(sv)
802 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
805 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
806 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
807 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
809 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
810 #define SvNOK_on(sv) (assert_not_glob(sv) \
811 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
812 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
813 #define SvNOK_only(sv) (SvOK_off(sv), \
814 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
817 =for apidoc Am|U32|SvUTF8|SV* sv
818 Returns a U32 value indicating whether the SV contains UTF-8 encoded data.
819 Call this after SvPV() in case any call to string overloading updates the
822 =for apidoc Am|void|SvUTF8_on|SV *sv
823 Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
824 Do not use frivolously.
826 =for apidoc Am|void|SvUTF8_off|SV *sv
827 Unsets the UTF-8 status of an SV.
829 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
830 Tells an SV that it is a string and disables all other OK bits,
831 and leaves the UTF-8 status as it was.
836 /* Ensure the return value of this macro does not clash with the GV_ADD* flags
838 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
839 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
840 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
842 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
843 #define SvPOK_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
844 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
845 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
846 #define SvPOK_only(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
847 SvFLAGS(sv) &= ~(SVf_OK| \
848 SVf_IVisUV|SVf_UTF8), \
849 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
850 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
851 SvFLAGS(sv) &= ~(SVf_OK| \
853 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
855 #define SvVOK(sv) (SvMAGICAL(sv) \
856 && mg_find(sv,PERL_MAGIC_vstring))
857 /* returns the vstring magic, if any */
858 #define SvVSTRING_mg(sv) (SvMAGICAL(sv) \
859 ? mg_find(sv,PERL_MAGIC_vstring) : NULL)
861 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
862 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
863 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
865 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
866 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
867 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
869 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
870 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
871 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK))
873 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
874 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
875 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
877 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
878 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
879 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
881 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
882 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
883 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
885 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
886 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
887 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
889 #define SvAMAGIC(sv) (SvROK(sv) && (SvFLAGS(SvRV(sv)) & SVf_AMAGIC))
890 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
891 # define SvAMAGIC_on(sv) ({ SV * const kloink = sv; \
892 assert(SvROK(kloink)); \
893 SvFLAGS(SvRV(kloink)) |= SVf_AMAGIC; \
895 # define SvAMAGIC_off(sv) ({ SV * const kloink = sv; \
897 SvFLAGS(SvRV(kloink)) &= ~SVf_AMAGIC;\
900 # define SvAMAGIC_on(sv) (SvFLAGS(SvRV(sv)) |= SVf_AMAGIC)
901 # define SvAMAGIC_off(sv) \
902 (SvROK(sv) && (SvFLAGS(SvRV(sv)) &= ~SVf_AMAGIC))
906 =for apidoc Am|char*|SvGAMAGIC|SV* sv
908 Returns true if the SV has get magic or overloading. If either is true then
909 the scalar is active data, and has the potential to return a new value every
910 time it is accessed. Hence you must be careful to only read it once per user
911 logical operation and work with that returned value. If neither is true then
912 the scalar's value cannot change unless written to.
917 #define SvGAMAGIC(sv) (SvGMAGICAL(sv) || SvAMAGIC(sv))
919 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
921 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
922 == (SVf_ROK|SVprv_WEAKREF))
923 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
924 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
926 #define SvPCS_IMPORTED(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_PCS_IMPORTED)) \
927 == (SVf_ROK|SVprv_PCS_IMPORTED))
928 #define SvPCS_IMPORTED_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_PCS_IMPORTED))
929 #define SvPCS_IMPORTED_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_PCS_IMPORTED))
931 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
933 #define SvPADSTALE(sv) (SvFLAGS(sv) & SVs_PADSTALE)
934 #define SvPADSTALE_on(sv) (SvFLAGS(sv) |= SVs_PADSTALE)
935 #define SvPADSTALE_off(sv) (SvFLAGS(sv) &= ~SVs_PADSTALE)
937 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
938 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
939 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
941 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
942 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY)
944 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
945 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
946 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
948 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
949 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
950 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
952 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
953 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
954 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
956 #define SvSCREAM(sv) ((SvFLAGS(sv) & (SVp_SCREAM|SVp_POK)) == (SVp_SCREAM|SVp_POK))
957 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
958 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
960 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
961 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
962 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
964 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
965 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
966 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
968 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
969 # define SvVALID(sv) ({ SV *const thwacke = (SV *) (sv); \
970 if (SvFLAGS(thwacke) & SVpbm_VALID) \
971 assert(!isGV_with_GP(thwacke)); \
972 (SvFLAGS(thwacke) & SVpbm_VALID); \
974 # define SvVALID_on(sv) ({ SV *const thwacke = (SV *) (sv); \
975 assert(!isGV_with_GP(thwacke)); \
976 (SvFLAGS(thwacke) |= SVpbm_VALID); \
978 # define SvVALID_off(sv) ({ SV *const thwacke = (SV *) (sv); \
979 assert(!isGV_with_GP(thwacke)); \
980 (SvFLAGS(thwacke) &= ~SVpbm_VALID); \
983 # define SvTAIL(sv) ({ SV *const _svi = (SV *) (sv); \
984 assert(SvTYPE(_svi) != SVt_PVAV); \
985 assert(SvTYPE(_svi) != SVt_PVHV); \
986 (SvFLAGS(sv) & (SVpbm_TAIL|SVpbm_VALID)) \
987 == (SVpbm_TAIL|SVpbm_VALID); \
990 # define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
991 # define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
992 # define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
993 # define SvTAIL(sv) ((SvFLAGS(sv) & (SVpbm_TAIL|SVpbm_VALID)) \
994 == (SVpbm_TAIL|SVpbm_VALID))
997 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
998 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
1001 #define SvPAD_TYPED(sv) \
1002 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_TYPED)) == (SVpad_NAME|SVpad_TYPED))
1004 #define SvPAD_OUR(sv) \
1005 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_OUR)) == (SVpad_NAME|SVpad_OUR))
1007 #define SvPAD_STATE(sv) \
1008 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_STATE)) == (SVpad_NAME|SVpad_STATE))
1010 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1011 # define SvPAD_TYPED_on(sv) ({ \
1012 SV *const whap = (SV *) (sv); \
1013 assert(SvTYPE(whap) == SVt_PVMG); \
1014 (SvFLAGS(whap) |= SVpad_NAME|SVpad_TYPED); \
1016 #define SvPAD_OUR_on(sv) ({ \
1017 SV *const whap = (SV *) (sv); \
1018 assert(SvTYPE(whap) == SVt_PVMG); \
1019 (SvFLAGS(whap) |= SVpad_NAME|SVpad_OUR); \
1021 #define SvPAD_STATE_on(sv) ({ \
1022 SV *const whap = (SV *) (sv); \
1023 assert(SvTYPE(whap) == SVt_PVNV || SvTYPE(whap) == SVt_PVMG); \
1024 (SvFLAGS(whap) |= SVpad_NAME|SVpad_STATE); \
1027 # define SvPAD_TYPED_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_TYPED)
1028 # define SvPAD_OUR_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_OUR)
1029 # define SvPAD_STATE_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_STATE)
1032 #define SvOURSTASH(sv) \
1033 (SvPAD_OUR(sv) ? ((XPVMG*) SvANY(sv))->xmg_u.xmg_ourstash : NULL)
1034 #define SvOURSTASH_set(sv, st) \
1036 assert(SvTYPE(sv) == SVt_PVMG); \
1037 ((XPVMG*) SvANY(sv))->xmg_u.xmg_ourstash = st; \
1040 #ifdef PERL_DEBUG_COW
1043 #define SvRVx(sv) SvRV(sv)
1045 #ifdef PERL_DEBUG_COW
1046 /* Need -0.0 for SvNVX to preserve IEEE FP "negative zero" because
1047 +0.0 + -0.0 => +0.0 but -0.0 + -0.0 => -0.0 */
1048 # define SvIVX(sv) (0 + ((XPVIV*) SvANY(sv))->xiv_iv)
1049 # define SvUVX(sv) (0 + ((XPVUV*) SvANY(sv))->xuv_uv)
1050 # define SvNVX(sv) (-0.0 + ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv)
1051 # define SvRV(sv) (0 + (sv)->sv_u.svu_rv)
1052 /* Don't test the core XS code yet. */
1053 # if defined (PERL_CORE) && PERL_DEBUG_COW > 1
1054 # define SvPVX(sv) (0 + (assert(!SvREADONLY(sv)), (sv)->sv_u.svu_pv))
1056 # define SvPVX(sv) SvPVX_mutable(sv)
1058 # define SvCUR(sv) (0 + ((XPV*) SvANY(sv))->xpv_cur)
1059 # define SvLEN(sv) (0 + ((XPV*) SvANY(sv))->xpv_len)
1060 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1063 # define SvMAGIC(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_u.xmg_magic))
1064 # define SvSTASH(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
1066 # define SvMAGIC(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic)
1067 # define SvSTASH(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_stash)
1070 # define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
1071 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1073 # if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1074 /* These get expanded inside other macros that already use a variable _sv */
1075 # define SvPVX(sv) \
1076 (*({ SV *const _svi = (SV *) (sv); \
1077 assert(SvTYPE(_svi) >= SVt_PV); \
1078 assert(SvTYPE(_svi) != SVt_PVAV); \
1079 assert(SvTYPE(_svi) != SVt_PVHV); \
1080 assert(!isGV_with_GP(_svi)); \
1081 &((_svi)->sv_u.svu_pv); \
1083 # define SvCUR(sv) \
1084 (*({ SV *const _svi = (SV *) (sv); \
1085 assert(SvTYPE(_svi) >= SVt_PV); \
1086 assert(SvTYPE(_svi) != SVt_PVAV); \
1087 assert(SvTYPE(_svi) != SVt_PVHV); \
1088 assert(!isGV_with_GP(_svi)); \
1089 &(((XPV*) SvANY(_svi))->xpv_cur); \
1091 # define SvIVX(sv) \
1092 (*({ SV *const _svi = (SV *) (sv); \
1093 assert(SvTYPE(_svi) == SVt_IV || SvTYPE(_svi) >= SVt_PVIV); \
1094 assert(SvTYPE(_svi) != SVt_PVAV); \
1095 assert(SvTYPE(_svi) != SVt_PVHV); \
1096 assert(SvTYPE(_svi) != SVt_PVCV); \
1097 assert(!isGV_with_GP(_svi)); \
1098 &(((XPVIV*) SvANY(_svi))->xiv_iv); \
1100 # define SvUVX(sv) \
1101 (*({ SV *const _svi = (SV *) (sv); \
1102 assert(SvTYPE(_svi) == SVt_IV || SvTYPE(_svi) >= SVt_PVIV); \
1103 assert(SvTYPE(_svi) != SVt_PVAV); \
1104 assert(SvTYPE(_svi) != SVt_PVHV); \
1105 assert(SvTYPE(_svi) != SVt_PVCV); \
1106 assert(!isGV_with_GP(_svi)); \
1107 &(((XPVUV*) SvANY(_svi))->xuv_uv); \
1109 # define SvNVX(sv) \
1110 (*({ SV *const _svi = (SV *) (sv); \
1111 assert(SvTYPE(_svi) == SVt_NV || SvTYPE(_svi) >= SVt_PVNV); \
1112 assert(SvTYPE(_svi) != SVt_PVAV); \
1113 assert(SvTYPE(_svi) != SVt_PVHV); \
1114 assert(SvTYPE(_svi) != SVt_PVCV); \
1115 assert(SvTYPE(_svi) != SVt_PVFM); \
1116 assert(SvTYPE(_svi) != SVt_PVIO); \
1117 assert(!isGV_with_GP(_svi)); \
1118 &(((XPVNV*) SvANY(_svi))->xnv_u.xnv_nv); \
1121 (*({ SV *const _svi = (SV *) (sv); \
1122 assert(SvTYPE(_svi) >= SVt_PV || SvTYPE(_svi) == SVt_IV); \
1123 assert(SvTYPE(_svi) != SVt_PVAV); \
1124 assert(SvTYPE(_svi) != SVt_PVHV); \
1125 assert(SvTYPE(_svi) != SVt_PVCV); \
1126 assert(SvTYPE(_svi) != SVt_PVFM); \
1127 assert(!isGV_with_GP(_svi)); \
1128 &((_svi)->sv_u.svu_rv); \
1130 # define SvMAGIC(sv) \
1131 (*({ SV *const _svi = (SV *) (sv); \
1132 assert(SvTYPE(_svi) >= SVt_PVMG); \
1133 if(SvTYPE(_svi) == SVt_PVMG) \
1134 assert(!SvPAD_OUR(_svi)); \
1135 &(((XPVMG*) SvANY(_svi))->xmg_u.xmg_magic); \
1137 # define SvSTASH(sv) \
1138 (*({ SV *const _svi = (SV *) (sv); \
1139 assert(SvTYPE(_svi) >= SVt_PVMG); \
1140 &(((XPVMG*) SvANY(_svi))->xmg_stash); \
1143 # define SvPVX(sv) ((sv)->sv_u.svu_pv)
1144 # define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
1145 # define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
1146 # define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
1147 # define SvNVX(sv) ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv
1148 # define SvRV(sv) ((sv)->sv_u.svu_rv)
1149 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic
1150 # define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
1155 /* Given that these two are new, there can't be any existing code using them
1157 # define SvPVX_mutable(sv) (0 + (sv)->sv_u.svu_pv)
1158 # define SvPVX_const(sv) ((const char*)(0 + (sv)->sv_u.svu_pv))
1160 /* Except for the poison code, which uses & to scribble over the pointer after
1161 free() is called. */
1162 # define SvPVX_mutable(sv) ((sv)->sv_u.svu_pv)
1163 # define SvPVX_const(sv) ((const char*)((sv)->sv_u.svu_pv))
1166 #define SvIVXx(sv) SvIVX(sv)
1167 #define SvUVXx(sv) SvUVX(sv)
1168 #define SvNVXx(sv) SvNVX(sv)
1169 #define SvPVXx(sv) SvPVX(sv)
1170 #define SvLENx(sv) SvLEN(sv)
1171 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
1174 /* Ask a scalar nicely to try to become an IV, if possible.
1175 Not guaranteed to stay returning void */
1176 /* Macro won't actually call sv_2iv if already IOK */
1177 #define SvIV_please(sv) \
1178 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
1179 (void) SvIV(sv); } STMT_END
1180 #define SvIV_set(sv, val) \
1181 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1182 assert(SvTYPE(sv) != SVt_PVAV); \
1183 assert(SvTYPE(sv) != SVt_PVHV); \
1184 assert(SvTYPE(sv) != SVt_PVCV); \
1185 assert(!isGV_with_GP(sv)); \
1186 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
1187 #define SvNV_set(sv, val) \
1188 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
1189 assert(SvTYPE(sv) != SVt_PVAV); assert(SvTYPE(sv) != SVt_PVHV); \
1190 assert(SvTYPE(sv) != SVt_PVCV); assert(SvTYPE(sv) != SVt_PVFM); \
1191 assert(SvTYPE(sv) != SVt_PVIO); \
1192 assert(!isGV_with_GP(sv)); \
1193 (((XPVNV*)SvANY(sv))->xnv_u.xnv_nv = (val)); } STMT_END
1194 #define SvPV_set(sv, val) \
1195 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1196 assert(SvTYPE(sv) != SVt_PVAV); \
1197 assert(SvTYPE(sv) != SVt_PVHV); \
1198 assert(!isGV_with_GP(sv)); \
1199 ((sv)->sv_u.svu_pv = (val)); } STMT_END
1200 #define SvUV_set(sv, val) \
1201 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1202 assert(SvTYPE(sv) != SVt_PVAV); \
1203 assert(SvTYPE(sv) != SVt_PVHV); \
1204 assert(SvTYPE(sv) != SVt_PVCV); \
1205 assert(!isGV_with_GP(sv)); \
1206 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
1207 #define SvRV_set(sv, val) \
1208 STMT_START { assert(SvTYPE(sv) >= SVt_PV || SvTYPE(sv) == SVt_IV); \
1209 assert(SvTYPE(sv) != SVt_PVAV); \
1210 assert(SvTYPE(sv) != SVt_PVHV); \
1211 assert(SvTYPE(sv) != SVt_PVCV); \
1212 assert(SvTYPE(sv) != SVt_PVFM); \
1213 assert(!isGV_with_GP(sv)); \
1214 ((sv)->sv_u.svu_rv = (val)); } STMT_END
1215 #define SvMAGIC_set(sv, val) \
1216 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1217 (((XPVMG*)SvANY(sv))->xmg_u.xmg_magic = (val)); } STMT_END
1218 #define SvSTASH_set(sv, val) \
1219 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1220 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
1221 #define SvCUR_set(sv, val) \
1222 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1223 assert(SvTYPE(sv) != SVt_PVAV); \
1224 assert(SvTYPE(sv) != SVt_PVHV); \
1225 assert(!isGV_with_GP(sv)); \
1226 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
1227 #define SvLEN_set(sv, val) \
1228 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1229 assert(SvTYPE(sv) != SVt_PVAV); \
1230 assert(SvTYPE(sv) != SVt_PVHV); \
1231 assert(!isGV_with_GP(sv)); \
1232 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
1233 #define SvEND_set(sv, val) \
1234 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1235 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
1237 #define SvPV_renew(sv,n) \
1238 STMT_START { SvLEN_set(sv, n); \
1239 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
1240 (char*)saferealloc((Malloc_t)SvPVX(sv), \
1241 (MEM_SIZE)((n))))); \
1244 #define SvPV_shrink_to_cur(sv) STMT_START { \
1245 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
1246 SvPV_renew(sv, _lEnGtH); \
1249 #define SvPV_free(sv) \
1251 assert(SvTYPE(sv) >= SVt_PV); \
1253 assert(!SvROK(sv)); \
1256 SvOOK_offset(sv, zok); \
1257 SvPV_set(sv, SvPVX_mutable(sv) - zok); \
1258 SvFLAGS(sv) &= ~SVf_OOK; \
1260 Safefree(SvPVX(sv)); \
1265 /* Code that crops up in three places to take a scalar and ready it to hold
1267 # define prepare_SV_for_RV(sv) \
1269 if (SvTYPE(sv) < SVt_PV && SvTYPE(sv) != SVt_IV) \
1270 sv_upgrade(sv, SVt_IV); \
1271 else if (SvTYPE(sv) >= SVt_PV) { \
1279 #define PERL_FBM_TABLE_OFFSET 1 /* Number of bytes between EOS and table */
1281 /* SvPOKp not SvPOK in the assertion because the string can be tainted! eg
1284 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1285 # define BmFLAGS(sv) \
1286 (*({ SV *const uggh = (SV *) (sv); \
1287 assert(SvTYPE(uggh) == SVt_PVGV); \
1288 assert(SvVALID(uggh)); \
1289 &(((XPVGV*) SvANY(uggh))->xnv_u.xbm_s.xbm_flags); \
1291 # define BmRARE(sv) \
1292 (*({ SV *const uggh = (SV *) (sv); \
1293 assert(SvTYPE(uggh) == SVt_PVGV); \
1294 assert(SvVALID(uggh)); \
1295 &(((XPVGV*) SvANY(uggh))->xnv_u.xbm_s.xbm_rare); \
1297 # define BmUSEFUL(sv) \
1298 (*({ SV *const uggh = (SV *) (sv); \
1299 assert(SvTYPE(uggh) == SVt_PVGV); \
1300 assert(SvVALID(uggh)); \
1301 assert(!SvIOK(uggh)); \
1302 &(((XPVGV*) SvANY(uggh))->xiv_u.xivu_i32); \
1304 # define BmPREVIOUS(sv) \
1305 (*({ SV *const uggh = (SV *) (sv); \
1306 assert(SvTYPE(uggh) == SVt_PVGV); \
1307 assert(SvVALID(uggh)); \
1308 &(((XPVGV*) SvANY(uggh))->xnv_u.xbm_s.xbm_previous); \
1311 # define BmFLAGS(sv) ((XPVGV*) SvANY(sv))->xnv_u.xbm_s.xbm_flags
1312 # define BmRARE(sv) ((XPVGV*) SvANY(sv))->xnv_u.xbm_s.xbm_rare
1313 # define BmUSEFUL(sv) ((XPVGV*) SvANY(sv))->xiv_u.xivu_i32
1314 # define BmPREVIOUS(sv) ((XPVGV*) SvANY(sv))->xnv_u.xbm_s.xbm_previous
1318 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
1320 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
1321 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
1322 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
1323 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
1325 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
1326 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
1327 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
1328 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
1329 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
1330 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
1331 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
1332 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
1333 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
1334 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
1335 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
1336 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
1337 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
1338 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
1339 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1340 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1342 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
1343 #define IoTYPE_RDONLY '<'
1344 #define IoTYPE_WRONLY '>'
1345 #define IoTYPE_RDWR '+'
1346 #define IoTYPE_APPEND 'a'
1347 #define IoTYPE_PIPE '|'
1348 #define IoTYPE_STD '-' /* stdin or stdout */
1349 #define IoTYPE_SOCKET 's'
1350 #define IoTYPE_CLOSED ' '
1351 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1352 #define IoTYPE_NUMERIC '#' /* fdopen */
1355 =for apidoc Am|bool|SvTAINTED|SV* sv
1356 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
1359 =for apidoc Am|void|SvTAINTED_on|SV* sv
1360 Marks an SV as tainted if tainting is enabled.
1362 =for apidoc Am|void|SvTAINTED_off|SV* sv
1363 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1364 some of Perl's fundamental security features. XS module authors should not
1365 use this function unless they fully understand all the implications of
1366 unconditionally untainting the value. Untainting should be done in the
1367 standard perl fashion, via a carefully crafted regexp, rather than directly
1368 untainting variables.
1370 =for apidoc Am|void|SvTAINT|SV* sv
1371 Taints an SV if tainting is enabled.
1376 #define sv_taint(sv) sv_magic((sv), NULL, PERL_MAGIC_taint, NULL, 0)
1378 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1379 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
1380 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
1382 #define SvTAINT(sv) \
1384 if (PL_tainting) { \
1391 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
1392 Like C<SvPV> but will force the SV into containing just a string
1393 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1396 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
1397 Like C<SvPV> but will force the SV into containing just a string
1398 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1399 directly. Doesn't process magic.
1401 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
1402 Returns a pointer to the string in the SV, or a stringified form of
1403 the SV if the SV does not contain a string. The SV may cache the
1404 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
1405 C<SvPVx> for a version which guarantees to evaluate sv only once.
1407 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
1408 A version of C<SvPV> which guarantees to evaluate C<sv> only once.
1409 Only use this if C<sv> is an expression with side effects, otherwise use the
1410 more efficient C<SvPVX>.
1412 =for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1413 Like C<SvPV> but doesn't process magic.
1415 =for apidoc Am|char*|SvPV_nolen|SV* sv
1416 Returns a pointer to the string in the SV, or a stringified form of
1417 the SV if the SV does not contain a string. The SV may cache the
1418 stringified form becoming C<SvPOK>. Handles 'get' magic.
1420 =for apidoc Am|IV|SvIV|SV* sv
1421 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
1422 version which guarantees to evaluate sv only once.
1424 =for apidoc Am|IV|SvIV_nomg|SV* sv
1425 Like C<SvIV> but doesn't process magic.
1427 =for apidoc Am|IV|SvIVx|SV* sv
1428 Coerces the given SV to an integer and returns it. Guarantees to evaluate
1429 C<sv> only once. Only use this if C<sv> is an expression with side effects,
1430 otherwise use the more efficient C<SvIV>.
1432 =for apidoc Am|NV|SvNV|SV* sv
1433 Coerce the given SV to a double and return it. See C<SvNVx> for a version
1434 which guarantees to evaluate sv only once.
1436 =for apidoc Am|NV|SvNVx|SV* sv
1437 Coerces the given SV to a double and returns it. Guarantees to evaluate
1438 C<sv> only once. Only use this if C<sv> is an expression with side effects,
1439 otherwise use the more efficient C<SvNV>.
1441 =for apidoc Am|UV|SvUV|SV* sv
1442 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
1443 for a version which guarantees to evaluate sv only once.
1445 =for apidoc Am|UV|SvUV_nomg|SV* sv
1446 Like C<SvUV> but doesn't process magic.
1448 =for apidoc Am|UV|SvUVx|SV* sv
1449 Coerces the given SV to an unsigned integer and returns it. Guarantees to
1450 C<sv> only once. Only use this if C<sv> is an expression with side effects,
1451 otherwise use the more efficient C<SvUV>.
1453 =for apidoc Am|bool|SvTRUE|SV* sv
1454 Returns a boolean indicating whether Perl would evaluate the SV as true or
1455 false, defined or undefined. Does not handle 'get' magic.
1457 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
1458 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1460 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
1461 Like C<SvPV>, but converts sv to utf8 first if necessary.
1463 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1464 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
1466 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1467 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1469 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1470 Like C<SvPV>, but converts sv to byte representation first if necessary.
1472 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1473 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1475 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1476 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1477 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1480 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1481 Like C<SvPV>, but converts sv to utf8 first if necessary.
1482 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1485 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1486 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1487 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1490 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1491 Like C<SvPV>, but converts sv to byte representation first if necessary.
1492 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1495 =for apidoc Am|bool|SvIsCOW|SV* sv
1496 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1497 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1500 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1501 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1504 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1505 Like C<sv_catpvn> but doesn't process magic.
1507 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1508 Like C<sv_setsv> but doesn't process magic.
1510 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1511 Like C<sv_catsv> but doesn't process magic.
1516 /* Let us hope that bitmaps for UV and IV are the same */
1517 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1518 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1519 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1521 #define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1522 #define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1526 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1527 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1528 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1530 #define SvPV_flags(sv, lp, flags) \
1531 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1532 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1533 #define SvPV_flags_const(sv, lp, flags) \
1534 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1535 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1536 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1537 #define SvPV_flags_const_nolen(sv, flags) \
1538 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1539 ? SvPVX_const(sv) : \
1540 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN))
1541 #define SvPV_flags_mutable(sv, lp, flags) \
1542 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1543 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1544 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1546 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1547 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1548 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1550 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1551 #define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
1553 #define SvPV_force_flags(sv, lp, flags) \
1554 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1555 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1556 #define SvPV_force_flags_nolen(sv, flags) \
1557 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1558 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1559 #define SvPV_force_flags_mutable(sv, lp, flags) \
1560 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1561 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1562 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1564 #define SvPV_nolen(sv) \
1565 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1566 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1568 #define SvPV_nolen_const(sv) \
1569 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1570 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1572 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1573 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1574 #define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
1578 #define SvPVutf8(sv, lp) \
1579 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1580 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1582 #define SvPVutf8_force(sv, lp) \
1583 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1584 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1587 #define SvPVutf8_nolen(sv) \
1588 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1589 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1593 #define SvPVbyte(sv, lp) \
1594 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1595 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1597 #define SvPVbyte_force(sv, lp) \
1598 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1599 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1601 #define SvPVbyte_nolen(sv) \
1602 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1603 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1607 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1608 * var to evaluate the arg once; failing that, use a global if possible;
1609 * failing that, call a function to do the work
1612 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1613 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1614 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1616 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1618 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1619 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1620 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1621 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1622 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1623 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1624 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1625 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1626 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1627 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1628 # define SvTRUE(sv) ( \
1632 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1634 (nxpv->xpv_cur > 1 || \
1635 (nxpv->xpv_cur && *(sv)->sv_u.svu_pv != '0')); }) \
1642 ? SvNVX(sv) != 0.0 \
1644 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1646 #else /* __GNUC__ */
1648 /* These inlined macros use globals, which will require a thread
1649 * declaration in user code, so we avoid them under threads */
1651 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1652 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1653 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1654 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1655 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1656 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1657 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1658 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1659 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1660 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1661 # define SvTRUE(sv) ( \
1665 ? ((PL_Xpv = (XPV*)SvANY(PL_Sv = (sv))) && \
1666 (PL_Xpv->xpv_cur > 1 || \
1667 (PL_Xpv->xpv_cur && *PL_Sv->sv_u.svu_pv != '0')) \
1674 ? SvNVX(sv) != 0.0 \
1676 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1677 #endif /* __GNU__ */
1679 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1680 (SVf_FAKE | SVf_READONLY))
1681 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1683 #define SvSHARED_HEK_FROM_PV(pvx) \
1684 ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
1685 #define SvSHARED_HASH(sv) (0 + SvSHARED_HEK_FROM_PV(SvPVX_const(sv))->hek_hash)
1687 /* flag values for sv_*_flags functions */
1688 #define SV_IMMEDIATE_UNREF 1
1690 #define SV_COW_DROP_PV 4
1691 #define SV_UTF8_NO_ENCODING 8
1692 #define SV_NOSTEAL 16
1693 #define SV_CONST_RETURN 32
1694 #define SV_MUTABLE_RETURN 64
1695 #define SV_SMAGIC 128
1696 #define SV_HAS_TRAILING_NUL 256
1697 #define SV_COW_SHARED_HASH_KEYS 512
1698 /* This one is only enabled for PERL_OLD_COPY_ON_WRITE */
1699 #define SV_COW_OTHER_PVS 1024
1700 /* Make sv_2pv_flags return NULL if something is undefined. */
1701 #define SV_UNDEF_RETURNS_NULL 2048
1703 /* The core is safe for this COW optimisation. XS code on CPAN may not be.
1704 So only default to doing the COW setup if we're in the core.
1707 # ifndef SV_DO_COW_SVSETSV
1708 # define SV_DO_COW_SVSETSV SV_COW_SHARED_HASH_KEYS|SV_COW_OTHER_PVS
1712 #ifndef SV_DO_COW_SVSETSV
1713 # define SV_DO_COW_SVSETSV 0
1717 #define sv_unref(sv) sv_unref_flags(sv, 0)
1718 #define sv_force_normal(sv) sv_force_normal_flags(sv, 0)
1719 #define sv_usepvn(sv, p, l) sv_usepvn_flags(sv, p, l, 0)
1720 #define sv_usepvn_mg(sv, p, l) sv_usepvn_flags(sv, p, l, SV_SMAGIC)
1722 /* We are about to replace the SV's current value. So if it's copy on write
1723 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1724 the value is about to get thrown away, so drop the PV rather than go to
1725 the effort of making a read-write copy only for it to get immediately
1728 #define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1729 sv_force_normal_flags(sv, SV_COW_DROP_PV)
1731 #ifdef PERL_OLD_COPY_ON_WRITE
1732 #define SvRELEASE_IVX(sv) \
1733 ((SvIsCOW(sv) ? sv_force_normal_flags(sv, 0) : (void) 0), 0)
1734 # define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
1735 # define SvRELEASE_IVX_(sv) SvRELEASE_IVX(sv),
1737 # define SvRELEASE_IVX(sv) 0
1738 /* This little game brought to you by the need to shut this warning up:
1739 mg.c: In function `Perl_magic_get':
1740 mg.c:1024: warning: left-hand operand of comma expression has no effect
1742 # define SvRELEASE_IVX_(sv) /**/
1743 #endif /* PERL_OLD_COPY_ON_WRITE */
1745 #define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1746 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1747 SVf_OOK|SVf_BREAK|SVf_READONLY)
1748 #define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1750 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1751 sv_force_normal_flags(sv, 0)
1754 /* all these 'functions' are now just macros */
1756 #define sv_pv(sv) SvPV_nolen(sv)
1757 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1758 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1760 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1761 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1762 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1763 #define sv_setsv(dsv, ssv) \
1764 sv_setsv_flags(dsv, ssv, SV_GMAGIC|SV_DO_COW_SVSETSV)
1765 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_DO_COW_SVSETSV)
1766 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1767 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1768 #define sv_catsv_mg(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC|SV_SMAGIC)
1769 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1770 #define sv_catpvn_mg(sv, sstr, slen) \
1771 sv_catpvn_flags(sv, sstr, slen, SV_GMAGIC|SV_SMAGIC);
1772 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1773 #define sv_2pv_nolen(sv) sv_2pv(sv, 0)
1774 #define sv_2pvbyte_nolen(sv) sv_2pvbyte(sv, 0)
1775 #define sv_2pvutf8_nolen(sv) sv_2pvutf8(sv, 0)
1776 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1777 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1778 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1779 #define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1780 #define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
1781 #define sv_insert(bigstr, offset, len, little, littlelen) \
1782 Perl_sv_insert_flags(aTHX_ (bigstr),(offset), (len), (little), \
1783 (littlelen), SV_GMAGIC)
1785 /* Should be named SvCatPVN_utf8_upgrade? */
1786 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1789 nsv = newSVpvn_flags(sstr, slen, SVs_TEMP); \
1791 sv_setpvn(nsv, sstr, slen); \
1793 sv_utf8_upgrade(nsv); \
1794 sv_catsv(dsv, nsv); \
1798 =for apidoc Am|SV*|newRV_inc|SV* sv
1800 Creates an RV wrapper for an SV. The reference count for the original SV is
1806 #define newRV_inc(sv) newRV(sv)
1808 /* the following macros update any magic values this sv is associated with */
1811 =head1 Magical Functions
1813 =for apidoc Am|void|SvGETMAGIC|SV* sv
1814 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1815 argument more than once.
1817 =for apidoc Am|void|SvSETMAGIC|SV* sv
1818 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1819 argument more than once.
1821 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1822 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1825 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1826 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1827 ssv. May evaluate arguments more than once.
1829 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1830 Like C<SvSetSV>, but does any set magic required afterwards.
1832 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1833 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1835 =for apidoc Am|void|SvSHARE|SV* sv
1836 Arranges for sv to be shared between threads if a suitable module
1839 =for apidoc Am|void|SvLOCK|SV* sv
1840 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1843 =for apidoc Am|void|SvUNLOCK|SV* sv
1844 Releases a mutual exclusion lock on sv if a suitable module
1847 =head1 SV Manipulation Functions
1849 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1850 Expands the character buffer in the SV so that it has room for the
1851 indicated number of bytes (remember to reserve space for an extra trailing
1852 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1853 Returns a pointer to the character buffer.
1858 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1859 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1860 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1861 #define SvDESTROYABLE(sv) CALL_FPTR(PL_destroyhook)(aTHX_ sv)
1863 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1864 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1866 #define SvSetSV_and(dst,src,finally) \
1868 if ((dst) != (src)) { \
1869 sv_setsv(dst, src); \
1873 #define SvSetSV_nosteal_and(dst,src,finally) \
1875 if ((dst) != (src)) { \
1876 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL | SV_DO_COW_SVSETSV); \
1881 #define SvSetSV(dst,src) \
1882 SvSetSV_and(dst,src,/*nothing*/;)
1883 #define SvSetSV_nosteal(dst,src) \
1884 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1886 #define SvSetMagicSV(dst,src) \
1887 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1888 #define SvSetMagicSV_nosteal(dst,src) \
1889 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1892 #if !defined(SKIP_DEBUGGING)
1893 #define SvPEEK(sv) sv_peek(sv)
1895 #define SvPEEK(sv) ""
1898 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1900 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1902 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1903 /* If I give every macro argument a different name, then there won't be bugs
1904 where nested macros get confused. Been there, done that. */
1905 #define isGV_with_GP(pwadak) \
1906 (((SvFLAGS(pwadak) & (SVp_POK|SVpgv_GP)) == SVpgv_GP) \
1907 && (SvTYPE(pwadak) == SVt_PVGV || SvTYPE(pwadak) == SVt_PVLV))
1908 #define isGV_with_GP_on(sv) STMT_START { \
1909 assert (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVLV); \
1910 assert (!SvPOKp(sv)); \
1911 assert (!SvIOKp(sv)); \
1912 (SvFLAGS(sv) |= SVpgv_GP); \
1914 #define isGV_with_GP_off(sv) STMT_START { \
1915 assert (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVLV); \
1916 assert (!SvPOKp(sv)); \
1917 assert (!SvIOKp(sv)); \
1918 (SvFLAGS(sv) &= ~SVpgv_GP); \
1922 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1923 #define SvGROW_mutable(sv,len) \
1924 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
1925 #define Sv_Grow sv_grow
1927 #define CLONEf_COPY_STACKS 1
1928 #define CLONEf_KEEP_PTR_TABLE 2
1929 #define CLONEf_CLONE_HOST 4
1930 #define CLONEf_JOIN_IN 8
1932 struct clone_params {
1935 PerlInterpreter *proto_perl;
1939 =for apidoc Am|SV*|newSVpvn_utf8|NULLOK const char* s|STRLEN len|U32 utf8
1941 Creates a new SV and copies a string into it. If utf8 is true, calls
1942 C<SvUTF8_on> on the new SV. Implemented as a wrapper around C<newSVpvn_flags>.
1947 #define newSVpvn_utf8(s, len, u) newSVpvn_flags((s), (len), (u) ? SVf_UTF8 : 0)
1950 =for apidoc Am|void|SvOOK_offset|NN SV*sv|STRLEN len
1952 Reads into I<len> the offset from SvPVX back to the true start of the
1953 allocated buffer, which will be non-zero if C<sv_chop> has been used to
1954 efficiently remove characters from start of the buffer. Implemented as a
1955 macro, which takes the address of I<len>, which must be of type C<STRLEN>.
1956 Evaluates I<sv> more than once. Sets I<len> to 0 if C<SvOOK(sv)> is false.
1962 /* Does the bot know something I don't?
1963 10:28 <@Nicholas> metabatman
1964 10:28 <+meta> Nicholas: crash
1966 # define SvOOK_offset(sv, offset) STMT_START { \
1967 assert(sizeof(offset) == sizeof(STRLEN)); \
1969 const U8 *crash = (U8*)SvPVX_const(sv); \
1970 offset = *--crash; \
1972 crash -= sizeof(STRLEN); \
1973 Copy(crash, (U8 *)&offset, sizeof(STRLEN), U8); \
1976 /* Validate the preceding buffer's sentinels to \
1977 verify that no-one is using it. */ \
1978 const U8 *const bonk = (U8 *) SvPVX_const(sv) - offset; \
1979 while (crash > bonk) { \
1981 assert (*crash == (U8)PTR2UV(crash)); \
1989 /* This is the same code, but avoids using any temporary variables: */
1990 # define SvOOK_offset(sv, offset) STMT_START { \
1991 assert(sizeof(offset) == sizeof(STRLEN)); \
1993 offset = ((U8*)SvPVX_const(sv))[-1]; \
1995 Copy(SvPVX_const(sv) - 1 - sizeof(STRLEN), \
1996 (U8 *)&offset, sizeof(STRLEN), U8); \
2005 * c-indentation-style: bsd
2007 * indent-tabs-mode: t
2010 * ex: set ts=8 sts=4 sw=4 noet: