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 _svvalid = (SV *) (sv); \
970 if (SvFLAGS(_svvalid) & SVpbm_VALID) \
971 assert(!isGV_with_GP(_svvalid)); \
972 (SvFLAGS(_svvalid) & SVpbm_VALID); \
974 # define SvVALID_on(sv) ({ SV *const _svvalid = (SV *) (sv); \
975 assert(!isGV_with_GP(_svvalid)); \
976 (SvFLAGS(_svvalid) |= SVpbm_VALID); \
978 # define SvVALID_off(sv) ({ SV *const _svvalid = (SV *) (sv); \
979 assert(!isGV_with_GP(_svvalid)); \
980 (SvFLAGS(_svvalid) &= ~SVpbm_VALID); \
983 # define SvTAIL(sv) ({ SV *const _svtail = (SV *) (sv); \
984 assert(SvTYPE(_svtail) != SVt_PVAV); \
985 assert(SvTYPE(_svtail) != 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 _svpad = (SV *) (sv); \
1013 assert(SvTYPE(_svpad) == SVt_PVMG); \
1014 (SvFLAGS(_svpad) |= SVpad_NAME|SVpad_TYPED); \
1016 #define SvPAD_OUR_on(sv) ({ \
1017 SV *const _svpad = (SV *) (sv); \
1018 assert(SvTYPE(_svpad) == SVt_PVMG); \
1019 (SvFLAGS(_svpad) |= SVpad_NAME|SVpad_OUR); \
1021 #define SvPAD_STATE_on(sv) ({ \
1022 SV *const _svpad = (SV *) (sv); \
1023 assert(SvTYPE(_svpad) == SVt_PVNV || SvTYPE(_svpad) == SVt_PVMG); \
1024 (SvFLAGS(_svpad) |= 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 _svpvx = (SV *) (sv); \
1077 assert(SvTYPE(_svpvx) >= SVt_PV); \
1078 assert(SvTYPE(_svpvx) != SVt_PVAV); \
1079 assert(SvTYPE(_svpvx) != SVt_PVHV); \
1080 assert(!isGV_with_GP(_svpvx)); \
1081 &((_svpvx)->sv_u.svu_pv); \
1083 # define SvCUR(sv) \
1084 (*({ SV *const _svcur = (SV *) (sv); \
1085 assert(SvTYPE(_svcur) >= SVt_PV); \
1086 assert(SvTYPE(_svcur) != SVt_PVAV); \
1087 assert(SvTYPE(_svcur) != SVt_PVHV); \
1088 assert(!isGV_with_GP(_svcur)); \
1089 &(((XPV*) SvANY(_svcur))->xpv_cur); \
1091 # define SvIVX(sv) \
1092 (*({ SV *const _svivx = (SV *) (sv); \
1093 assert(SvTYPE(_svivx) == SVt_IV || SvTYPE(_svivx) >= SVt_PVIV); \
1094 assert(SvTYPE(_svivx) != SVt_PVAV); \
1095 assert(SvTYPE(_svivx) != SVt_PVHV); \
1096 assert(SvTYPE(_svivx) != SVt_PVCV); \
1097 assert(SvTYPE(_svivx) != SVt_PVFM); \
1098 assert(!isGV_with_GP(_svivx)); \
1099 &(((XPVIV*) SvANY(_svivx))->xiv_iv); \
1101 # define SvUVX(sv) \
1102 (*({ SV *const _svuvx = (SV *) (sv); \
1103 assert(SvTYPE(_svuvx) == SVt_IV || SvTYPE(_svuvx) >= SVt_PVIV); \
1104 assert(SvTYPE(_svuvx) != SVt_PVAV); \
1105 assert(SvTYPE(_svuvx) != SVt_PVHV); \
1106 assert(SvTYPE(_svuvx) != SVt_PVCV); \
1107 assert(SvTYPE(_svuvx) != SVt_PVFM); \
1108 assert(!isGV_with_GP(_svuvx)); \
1109 &(((XPVUV*) SvANY(_svuvx))->xuv_uv); \
1111 # define SvNVX(sv) \
1112 (*({ SV *const _svnvx = (SV *) (sv); \
1113 assert(SvTYPE(_svnvx) == SVt_NV || SvTYPE(_svnvx) >= SVt_PVNV); \
1114 assert(SvTYPE(_svnvx) != SVt_PVAV); \
1115 assert(SvTYPE(_svnvx) != SVt_PVHV); \
1116 assert(SvTYPE(_svnvx) != SVt_PVCV); \
1117 assert(SvTYPE(_svnvx) != SVt_PVFM); \
1118 assert(SvTYPE(_svnvx) != SVt_PVIO); \
1119 assert(!isGV_with_GP(_svnvx)); \
1120 &(((XPVNV*) SvANY(_svnvx))->xnv_u.xnv_nv); \
1123 (*({ SV *const _svrv = (SV *) (sv); \
1124 assert(SvTYPE(_svrv) >= SVt_PV || SvTYPE(_svrv) == SVt_IV); \
1125 assert(SvTYPE(_svrv) != SVt_PVAV); \
1126 assert(SvTYPE(_svrv) != SVt_PVHV); \
1127 assert(SvTYPE(_svrv) != SVt_PVCV); \
1128 assert(SvTYPE(_svrv) != SVt_PVFM); \
1129 assert(!isGV_with_GP(_svrv)); \
1130 &((_svrv)->sv_u.svu_rv); \
1132 # define SvMAGIC(sv) \
1133 (*({ SV *const _svmagic = (SV *) (sv); \
1134 assert(SvTYPE(_svmagic) >= SVt_PVMG); \
1135 if(SvTYPE(_svmagic) == SVt_PVMG) \
1136 assert(!SvPAD_OUR(_svmagic)); \
1137 &(((XPVMG*) SvANY(_svmagic))->xmg_u.xmg_magic); \
1139 # define SvSTASH(sv) \
1140 (*({ SV *const _svstash = (SV *) (sv); \
1141 assert(SvTYPE(_svstash) >= SVt_PVMG); \
1142 &(((XPVMG*) SvANY(_svstash))->xmg_stash); \
1145 # define SvPVX(sv) ((sv)->sv_u.svu_pv)
1146 # define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
1147 # define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
1148 # define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
1149 # define SvNVX(sv) ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv
1150 # define SvRV(sv) ((sv)->sv_u.svu_rv)
1151 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic
1152 # define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
1157 /* Given that these two are new, there can't be any existing code using them
1159 # define SvPVX_mutable(sv) (0 + (sv)->sv_u.svu_pv)
1160 # define SvPVX_const(sv) ((const char*)(0 + (sv)->sv_u.svu_pv))
1162 /* Except for the poison code, which uses & to scribble over the pointer after
1163 free() is called. */
1164 # define SvPVX_mutable(sv) ((sv)->sv_u.svu_pv)
1165 # define SvPVX_const(sv) ((const char*)((sv)->sv_u.svu_pv))
1168 #define SvIVXx(sv) SvIVX(sv)
1169 #define SvUVXx(sv) SvUVX(sv)
1170 #define SvNVXx(sv) SvNVX(sv)
1171 #define SvPVXx(sv) SvPVX(sv)
1172 #define SvLENx(sv) SvLEN(sv)
1173 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
1176 /* Ask a scalar nicely to try to become an IV, if possible.
1177 Not guaranteed to stay returning void */
1178 /* Macro won't actually call sv_2iv if already IOK */
1179 #define SvIV_please(sv) \
1180 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
1181 (void) SvIV(sv); } STMT_END
1182 #define SvIV_set(sv, val) \
1183 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1184 assert(SvTYPE(sv) != SVt_PVAV); \
1185 assert(SvTYPE(sv) != SVt_PVHV); \
1186 assert(SvTYPE(sv) != SVt_PVCV); \
1187 assert(!isGV_with_GP(sv)); \
1188 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
1189 #define SvNV_set(sv, val) \
1190 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
1191 assert(SvTYPE(sv) != SVt_PVAV); assert(SvTYPE(sv) != SVt_PVHV); \
1192 assert(SvTYPE(sv) != SVt_PVCV); assert(SvTYPE(sv) != SVt_PVFM); \
1193 assert(SvTYPE(sv) != SVt_PVIO); \
1194 assert(!isGV_with_GP(sv)); \
1195 (((XPVNV*)SvANY(sv))->xnv_u.xnv_nv = (val)); } STMT_END
1196 #define SvPV_set(sv, val) \
1197 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1198 assert(SvTYPE(sv) != SVt_PVAV); \
1199 assert(SvTYPE(sv) != SVt_PVHV); \
1200 assert(!isGV_with_GP(sv)); \
1201 ((sv)->sv_u.svu_pv = (val)); } STMT_END
1202 #define SvUV_set(sv, val) \
1203 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1204 assert(SvTYPE(sv) != SVt_PVAV); \
1205 assert(SvTYPE(sv) != SVt_PVHV); \
1206 assert(SvTYPE(sv) != SVt_PVCV); \
1207 assert(!isGV_with_GP(sv)); \
1208 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
1209 #define SvRV_set(sv, val) \
1210 STMT_START { assert(SvTYPE(sv) >= SVt_PV || SvTYPE(sv) == SVt_IV); \
1211 assert(SvTYPE(sv) != SVt_PVAV); \
1212 assert(SvTYPE(sv) != SVt_PVHV); \
1213 assert(SvTYPE(sv) != SVt_PVCV); \
1214 assert(SvTYPE(sv) != SVt_PVFM); \
1215 assert(!isGV_with_GP(sv)); \
1216 ((sv)->sv_u.svu_rv = (val)); } STMT_END
1217 #define SvMAGIC_set(sv, val) \
1218 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1219 (((XPVMG*)SvANY(sv))->xmg_u.xmg_magic = (val)); } STMT_END
1220 #define SvSTASH_set(sv, val) \
1221 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1222 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
1223 #define SvCUR_set(sv, val) \
1224 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1225 assert(SvTYPE(sv) != SVt_PVAV); \
1226 assert(SvTYPE(sv) != SVt_PVHV); \
1227 assert(!isGV_with_GP(sv)); \
1228 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
1229 #define SvLEN_set(sv, val) \
1230 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1231 assert(SvTYPE(sv) != SVt_PVAV); \
1232 assert(SvTYPE(sv) != SVt_PVHV); \
1233 assert(!isGV_with_GP(sv)); \
1234 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
1235 #define SvEND_set(sv, val) \
1236 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1237 SvCUR_set(sv, (val) - SvPVX(sv)); } STMT_END
1239 #define SvPV_renew(sv,n) \
1240 STMT_START { SvLEN_set(sv, n); \
1241 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
1242 (char*)saferealloc((Malloc_t)SvPVX(sv), \
1243 (MEM_SIZE)((n))))); \
1246 #define SvPV_shrink_to_cur(sv) STMT_START { \
1247 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
1248 SvPV_renew(sv, _lEnGtH); \
1251 #define SvPV_free(sv) \
1253 assert(SvTYPE(sv) >= SVt_PV); \
1255 assert(!SvROK(sv)); \
1258 SvOOK_offset(sv, zok); \
1259 SvPV_set(sv, SvPVX_mutable(sv) - zok); \
1260 SvFLAGS(sv) &= ~SVf_OOK; \
1262 Safefree(SvPVX(sv)); \
1267 /* Code that crops up in three places to take a scalar and ready it to hold
1269 # define prepare_SV_for_RV(sv) \
1271 if (SvTYPE(sv) < SVt_PV && SvTYPE(sv) != SVt_IV) \
1272 sv_upgrade(sv, SVt_IV); \
1273 else if (SvTYPE(sv) >= SVt_PV) { \
1281 #define PERL_FBM_TABLE_OFFSET 1 /* Number of bytes between EOS and table */
1283 /* SvPOKp not SvPOK in the assertion because the string can be tainted! eg
1286 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1287 # define BmFLAGS(sv) \
1288 (*({ SV *const _bmflags = (SV *) (sv); \
1289 assert(SvTYPE(_bmflags) == SVt_PVGV); \
1290 assert(SvVALID(_bmflags)); \
1291 &(((XPVGV*) SvANY(_bmflags))->xnv_u.xbm_s.xbm_flags); \
1293 # define BmRARE(sv) \
1294 (*({ SV *const _bmrare = (SV *) (sv); \
1295 assert(SvTYPE(_bmrare) == SVt_PVGV); \
1296 assert(SvVALID(_bmrare)); \
1297 &(((XPVGV*) SvANY(_bmrare))->xnv_u.xbm_s.xbm_rare); \
1299 # define BmUSEFUL(sv) \
1300 (*({ SV *const _bmuseful = (SV *) (sv); \
1301 assert(SvTYPE(_bmuseful) == SVt_PVGV); \
1302 assert(SvVALID(_bmuseful)); \
1303 assert(!SvIOK(_bmuseful)); \
1304 &(((XPVGV*) SvANY(_bmuseful))->xiv_u.xivu_i32); \
1306 # define BmPREVIOUS(sv) \
1307 (*({ SV *const _bmprevious = (SV *) (sv); \
1308 assert(SvTYPE(_bmprevious) == SVt_PVGV); \
1309 assert(SvVALID(_bmprevious)); \
1310 &(((XPVGV*) SvANY(_bmprevious))->xnv_u.xbm_s.xbm_previous); \
1313 # define BmFLAGS(sv) ((XPVGV*) SvANY(sv))->xnv_u.xbm_s.xbm_flags
1314 # define BmRARE(sv) ((XPVGV*) SvANY(sv))->xnv_u.xbm_s.xbm_rare
1315 # define BmUSEFUL(sv) ((XPVGV*) SvANY(sv))->xiv_u.xivu_i32
1316 # define BmPREVIOUS(sv) ((XPVGV*) SvANY(sv))->xnv_u.xbm_s.xbm_previous
1320 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
1322 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
1323 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
1324 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
1325 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
1327 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
1328 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
1329 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
1330 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
1331 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
1332 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
1333 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
1334 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
1335 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
1336 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
1337 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
1338 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
1339 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
1340 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
1341 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1342 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1344 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
1345 #define IoTYPE_RDONLY '<'
1346 #define IoTYPE_WRONLY '>'
1347 #define IoTYPE_RDWR '+'
1348 #define IoTYPE_APPEND 'a'
1349 #define IoTYPE_PIPE '|'
1350 #define IoTYPE_STD '-' /* stdin or stdout */
1351 #define IoTYPE_SOCKET 's'
1352 #define IoTYPE_CLOSED ' '
1353 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1354 #define IoTYPE_NUMERIC '#' /* fdopen */
1357 =for apidoc Am|bool|SvTAINTED|SV* sv
1358 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
1361 =for apidoc Am|void|SvTAINTED_on|SV* sv
1362 Marks an SV as tainted if tainting is enabled.
1364 =for apidoc Am|void|SvTAINTED_off|SV* sv
1365 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1366 some of Perl's fundamental security features. XS module authors should not
1367 use this function unless they fully understand all the implications of
1368 unconditionally untainting the value. Untainting should be done in the
1369 standard perl fashion, via a carefully crafted regexp, rather than directly
1370 untainting variables.
1372 =for apidoc Am|void|SvTAINT|SV* sv
1373 Taints an SV if tainting is enabled.
1378 #define sv_taint(sv) sv_magic((sv), NULL, PERL_MAGIC_taint, NULL, 0)
1380 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1381 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
1382 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
1384 #define SvTAINT(sv) \
1386 if (PL_tainting) { \
1393 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
1394 Like C<SvPV> but will force the SV into containing just a string
1395 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1398 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
1399 Like C<SvPV> but will force the SV into containing just a string
1400 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1401 directly. Doesn't process magic.
1403 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
1404 Returns a pointer to the string in the SV, or a stringified form of
1405 the SV if the SV does not contain a string. The SV may cache the
1406 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
1407 C<SvPVx> for a version which guarantees to evaluate sv only once.
1409 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
1410 A version of C<SvPV> which guarantees to evaluate C<sv> only once.
1411 Only use this if C<sv> is an expression with side effects, otherwise use the
1412 more efficient C<SvPVX>.
1414 =for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1415 Like C<SvPV> but doesn't process magic.
1417 =for apidoc Am|char*|SvPV_nolen|SV* sv
1418 Returns a pointer to the string in the SV, or a stringified form of
1419 the SV if the SV does not contain a string. The SV may cache the
1420 stringified form becoming C<SvPOK>. Handles 'get' magic.
1422 =for apidoc Am|IV|SvIV|SV* sv
1423 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
1424 version which guarantees to evaluate sv only once.
1426 =for apidoc Am|IV|SvIV_nomg|SV* sv
1427 Like C<SvIV> but doesn't process magic.
1429 =for apidoc Am|IV|SvIVx|SV* sv
1430 Coerces the given SV to an integer and returns it. Guarantees to evaluate
1431 C<sv> only once. Only use this if C<sv> is an expression with side effects,
1432 otherwise use the more efficient C<SvIV>.
1434 =for apidoc Am|NV|SvNV|SV* sv
1435 Coerce the given SV to a double and return it. See C<SvNVx> for a version
1436 which guarantees to evaluate sv only once.
1438 =for apidoc Am|NV|SvNVx|SV* sv
1439 Coerces the given SV to a double and returns it. Guarantees to evaluate
1440 C<sv> only once. Only use this if C<sv> is an expression with side effects,
1441 otherwise use the more efficient C<SvNV>.
1443 =for apidoc Am|UV|SvUV|SV* sv
1444 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
1445 for a version which guarantees to evaluate sv only once.
1447 =for apidoc Am|UV|SvUV_nomg|SV* sv
1448 Like C<SvUV> but doesn't process magic.
1450 =for apidoc Am|UV|SvUVx|SV* sv
1451 Coerces the given SV to an unsigned integer and returns it. Guarantees to
1452 C<sv> only once. Only use this if C<sv> is an expression with side effects,
1453 otherwise use the more efficient C<SvUV>.
1455 =for apidoc Am|bool|SvTRUE|SV* sv
1456 Returns a boolean indicating whether Perl would evaluate the SV as true or
1457 false, defined or undefined. Does not handle 'get' magic.
1459 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
1460 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1462 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
1463 Like C<SvPV>, but converts sv to utf8 first if necessary.
1465 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1466 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
1468 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1469 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1471 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1472 Like C<SvPV>, but converts sv to byte representation first if necessary.
1474 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1475 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1477 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1478 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1479 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1482 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1483 Like C<SvPV>, but converts sv to utf8 first if necessary.
1484 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1487 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1488 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1489 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1492 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1493 Like C<SvPV>, but converts sv to byte representation first if necessary.
1494 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1497 =for apidoc Am|bool|SvIsCOW|SV* sv
1498 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1499 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1502 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1503 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1506 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1507 Like C<sv_catpvn> but doesn't process magic.
1509 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1510 Like C<sv_setsv> but doesn't process magic.
1512 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1513 Like C<sv_catsv> but doesn't process magic.
1518 /* Let us hope that bitmaps for UV and IV are the same */
1519 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1520 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1521 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1523 #define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1524 #define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1528 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1529 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1530 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1532 #define SvPV_flags(sv, lp, flags) \
1533 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1534 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1535 #define SvPV_flags_const(sv, lp, flags) \
1536 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1537 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1538 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1539 #define SvPV_flags_const_nolen(sv, flags) \
1540 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1541 ? SvPVX_const(sv) : \
1542 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN))
1543 #define SvPV_flags_mutable(sv, lp, flags) \
1544 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1545 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1546 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1548 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1549 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1550 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1552 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1553 #define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
1555 #define SvPV_force_flags(sv, lp, flags) \
1556 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1557 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1558 #define SvPV_force_flags_nolen(sv, flags) \
1559 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1560 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1561 #define SvPV_force_flags_mutable(sv, lp, flags) \
1562 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1563 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1564 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1566 #define SvPV_nolen(sv) \
1567 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1568 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1570 #define SvPV_nolen_const(sv) \
1571 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1572 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1574 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1575 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1576 #define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
1580 #define SvPVutf8(sv, lp) \
1581 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1582 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1584 #define SvPVutf8_force(sv, lp) \
1585 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1586 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1589 #define SvPVutf8_nolen(sv) \
1590 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1591 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1595 #define SvPVbyte(sv, lp) \
1596 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1597 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1599 #define SvPVbyte_force(sv, lp) \
1600 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1601 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1603 #define SvPVbyte_nolen(sv) \
1604 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1605 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1609 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1610 * var to evaluate the arg once; failing that, use a global if possible;
1611 * failing that, call a function to do the work
1614 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1615 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1616 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1618 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1620 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1621 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1622 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1623 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1624 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1625 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1626 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1627 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1628 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1629 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1630 # define SvTRUE(sv) ( \
1634 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1636 (nxpv->xpv_cur > 1 || \
1637 (nxpv->xpv_cur && *(sv)->sv_u.svu_pv != '0')); }) \
1644 ? SvNVX(sv) != 0.0 \
1646 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1648 #else /* __GNUC__ */
1650 /* These inlined macros use globals, which will require a thread
1651 * declaration in user code, so we avoid them under threads */
1653 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1654 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1655 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1656 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1657 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1658 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1659 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1660 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1661 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1662 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1663 # define SvTRUE(sv) ( \
1667 ? ((PL_Xpv = (XPV*)SvANY(PL_Sv = (sv))) && \
1668 (PL_Xpv->xpv_cur > 1 || \
1669 (PL_Xpv->xpv_cur && *PL_Sv->sv_u.svu_pv != '0')) \
1676 ? SvNVX(sv) != 0.0 \
1678 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1679 #endif /* __GNU__ */
1681 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1682 (SVf_FAKE | SVf_READONLY))
1683 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1685 #define SvSHARED_HEK_FROM_PV(pvx) \
1686 ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
1687 #define SvSHARED_HASH(sv) (0 + SvSHARED_HEK_FROM_PV(SvPVX_const(sv))->hek_hash)
1689 /* flag values for sv_*_flags functions */
1690 #define SV_IMMEDIATE_UNREF 1
1692 #define SV_COW_DROP_PV 4
1693 #define SV_UTF8_NO_ENCODING 8
1694 #define SV_NOSTEAL 16
1695 #define SV_CONST_RETURN 32
1696 #define SV_MUTABLE_RETURN 64
1697 #define SV_SMAGIC 128
1698 #define SV_HAS_TRAILING_NUL 256
1699 #define SV_COW_SHARED_HASH_KEYS 512
1700 /* This one is only enabled for PERL_OLD_COPY_ON_WRITE */
1701 #define SV_COW_OTHER_PVS 1024
1702 /* Make sv_2pv_flags return NULL if something is undefined. */
1703 #define SV_UNDEF_RETURNS_NULL 2048
1705 /* The core is safe for this COW optimisation. XS code on CPAN may not be.
1706 So only default to doing the COW setup if we're in the core.
1709 # ifndef SV_DO_COW_SVSETSV
1710 # define SV_DO_COW_SVSETSV SV_COW_SHARED_HASH_KEYS|SV_COW_OTHER_PVS
1714 #ifndef SV_DO_COW_SVSETSV
1715 # define SV_DO_COW_SVSETSV 0
1719 #define sv_unref(sv) sv_unref_flags(sv, 0)
1720 #define sv_force_normal(sv) sv_force_normal_flags(sv, 0)
1721 #define sv_usepvn(sv, p, l) sv_usepvn_flags(sv, p, l, 0)
1722 #define sv_usepvn_mg(sv, p, l) sv_usepvn_flags(sv, p, l, SV_SMAGIC)
1724 /* We are about to replace the SV's current value. So if it's copy on write
1725 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1726 the value is about to get thrown away, so drop the PV rather than go to
1727 the effort of making a read-write copy only for it to get immediately
1730 #define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1731 sv_force_normal_flags(sv, SV_COW_DROP_PV)
1733 #ifdef PERL_OLD_COPY_ON_WRITE
1734 #define SvRELEASE_IVX(sv) \
1735 ((SvIsCOW(sv) ? sv_force_normal_flags(sv, 0) : (void) 0), 0)
1736 # define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
1737 # define SvRELEASE_IVX_(sv) SvRELEASE_IVX(sv),
1739 # define SvRELEASE_IVX(sv) 0
1740 /* This little game brought to you by the need to shut this warning up:
1741 mg.c: In function `Perl_magic_get':
1742 mg.c:1024: warning: left-hand operand of comma expression has no effect
1744 # define SvRELEASE_IVX_(sv) /**/
1745 #endif /* PERL_OLD_COPY_ON_WRITE */
1747 #define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1748 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1749 SVf_OOK|SVf_BREAK|SVf_READONLY)
1750 #define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1752 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1753 sv_force_normal_flags(sv, 0)
1756 /* all these 'functions' are now just macros */
1758 #define sv_pv(sv) SvPV_nolen(sv)
1759 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1760 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1762 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1763 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1764 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1765 #define sv_setsv(dsv, ssv) \
1766 sv_setsv_flags(dsv, ssv, SV_GMAGIC|SV_DO_COW_SVSETSV)
1767 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_DO_COW_SVSETSV)
1768 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1769 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1770 #define sv_catsv_mg(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC|SV_SMAGIC)
1771 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1772 #define sv_catpvn_mg(sv, sstr, slen) \
1773 sv_catpvn_flags(sv, sstr, slen, SV_GMAGIC|SV_SMAGIC);
1774 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1775 #define sv_2pv_nolen(sv) sv_2pv(sv, 0)
1776 #define sv_2pvbyte_nolen(sv) sv_2pvbyte(sv, 0)
1777 #define sv_2pvutf8_nolen(sv) sv_2pvutf8(sv, 0)
1778 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1779 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1780 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1781 #define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1782 #define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
1783 #define sv_insert(bigstr, offset, len, little, littlelen) \
1784 Perl_sv_insert_flags(aTHX_ (bigstr),(offset), (len), (little), \
1785 (littlelen), SV_GMAGIC)
1787 /* Should be named SvCatPVN_utf8_upgrade? */
1788 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1791 nsv = newSVpvn_flags(sstr, slen, SVs_TEMP); \
1793 sv_setpvn(nsv, sstr, slen); \
1795 sv_utf8_upgrade(nsv); \
1796 sv_catsv(dsv, nsv); \
1800 =for apidoc Am|SV*|newRV_inc|SV* sv
1802 Creates an RV wrapper for an SV. The reference count for the original SV is
1808 #define newRV_inc(sv) newRV(sv)
1810 /* the following macros update any magic values this sv is associated with */
1813 =head1 Magical Functions
1815 =for apidoc Am|void|SvGETMAGIC|SV* sv
1816 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1817 argument more than once.
1819 =for apidoc Am|void|SvSETMAGIC|SV* sv
1820 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1821 argument more than once.
1823 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1824 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1827 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1828 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1829 ssv. May evaluate arguments more than once.
1831 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1832 Like C<SvSetSV>, but does any set magic required afterwards.
1834 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1835 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1837 =for apidoc Am|void|SvSHARE|SV* sv
1838 Arranges for sv to be shared between threads if a suitable module
1841 =for apidoc Am|void|SvLOCK|SV* sv
1842 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1845 =for apidoc Am|void|SvUNLOCK|SV* sv
1846 Releases a mutual exclusion lock on sv if a suitable module
1849 =head1 SV Manipulation Functions
1851 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1852 Expands the character buffer in the SV so that it has room for the
1853 indicated number of bytes (remember to reserve space for an extra trailing
1854 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1855 Returns a pointer to the character buffer.
1860 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1861 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1862 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1863 #define SvDESTROYABLE(sv) CALL_FPTR(PL_destroyhook)(aTHX_ sv)
1865 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1866 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1868 #define SvSetSV_and(dst,src,finally) \
1870 if ((dst) != (src)) { \
1871 sv_setsv(dst, src); \
1875 #define SvSetSV_nosteal_and(dst,src,finally) \
1877 if ((dst) != (src)) { \
1878 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL | SV_DO_COW_SVSETSV); \
1883 #define SvSetSV(dst,src) \
1884 SvSetSV_and(dst,src,/*nothing*/;)
1885 #define SvSetSV_nosteal(dst,src) \
1886 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1888 #define SvSetMagicSV(dst,src) \
1889 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1890 #define SvSetMagicSV_nosteal(dst,src) \
1891 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1894 #if !defined(SKIP_DEBUGGING)
1895 #define SvPEEK(sv) sv_peek(sv)
1897 #define SvPEEK(sv) ""
1900 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1902 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1904 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1905 /* If I give every macro argument a different name, then there won't be bugs
1906 where nested macros get confused. Been there, done that. */
1907 #define isGV_with_GP(pwadak) \
1908 (((SvFLAGS(pwadak) & (SVp_POK|SVpgv_GP)) == SVpgv_GP) \
1909 && (SvTYPE(pwadak) == SVt_PVGV || SvTYPE(pwadak) == SVt_PVLV))
1910 #define isGV_with_GP_on(sv) STMT_START { \
1911 assert (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVLV); \
1912 assert (!SvPOKp(sv)); \
1913 assert (!SvIOKp(sv)); \
1914 (SvFLAGS(sv) |= SVpgv_GP); \
1916 #define isGV_with_GP_off(sv) STMT_START { \
1917 assert (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVLV); \
1918 assert (!SvPOKp(sv)); \
1919 assert (!SvIOKp(sv)); \
1920 (SvFLAGS(sv) &= ~SVpgv_GP); \
1924 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1925 #define SvGROW_mutable(sv,len) \
1926 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
1927 #define Sv_Grow sv_grow
1929 #define CLONEf_COPY_STACKS 1
1930 #define CLONEf_KEEP_PTR_TABLE 2
1931 #define CLONEf_CLONE_HOST 4
1932 #define CLONEf_JOIN_IN 8
1934 struct clone_params {
1937 PerlInterpreter *proto_perl;
1941 =for apidoc Am|SV*|newSVpvn_utf8|NULLOK const char* s|STRLEN len|U32 utf8
1943 Creates a new SV and copies a string into it. If utf8 is true, calls
1944 C<SvUTF8_on> on the new SV. Implemented as a wrapper around C<newSVpvn_flags>.
1949 #define newSVpvn_utf8(s, len, u) newSVpvn_flags((s), (len), (u) ? SVf_UTF8 : 0)
1952 =for apidoc Am|void|SvOOK_offset|NN SV*sv|STRLEN len
1954 Reads into I<len> the offset from SvPVX back to the true start of the
1955 allocated buffer, which will be non-zero if C<sv_chop> has been used to
1956 efficiently remove characters from start of the buffer. Implemented as a
1957 macro, which takes the address of I<len>, which must be of type C<STRLEN>.
1958 Evaluates I<sv> more than once. Sets I<len> to 0 if C<SvOOK(sv)> is false.
1964 /* Does the bot know something I don't?
1965 10:28 <@Nicholas> metabatman
1966 10:28 <+meta> Nicholas: crash
1968 # define SvOOK_offset(sv, offset) STMT_START { \
1969 assert(sizeof(offset) == sizeof(STRLEN)); \
1971 const U8 *crash = (U8*)SvPVX_const(sv); \
1972 offset = *--crash; \
1974 crash -= sizeof(STRLEN); \
1975 Copy(crash, (U8 *)&offset, sizeof(STRLEN), U8); \
1978 /* Validate the preceding buffer's sentinels to \
1979 verify that no-one is using it. */ \
1980 const U8 *const bonk = (U8 *) SvPVX_const(sv) - offset; \
1981 while (crash > bonk) { \
1983 assert (*crash == (U8)PTR2UV(crash)); \
1991 /* This is the same code, but avoids using any temporary variables: */
1992 # define SvOOK_offset(sv, offset) STMT_START { \
1993 assert(sizeof(offset) == sizeof(STRLEN)); \
1995 offset = ((U8*)SvPVX_const(sv))[-1]; \
1997 Copy(SvPVX_const(sv) - 1 - sizeof(STRLEN), \
1998 (U8 *)&offset, sizeof(STRLEN), U8); \
2007 * c-indentation-style: bsd
2009 * indent-tabs-mode: t
2012 * ex: set ts=8 sts=4 sw=4 noet: