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>.
56 /* PVBM was here, before BIND replaced it. */
64 SVt_LAST /* keep last in enum. used to size arrays */
68 /* Although Fast Boyer Moore tables are now being stored in PVGVs, for most
69 purposes eternal code wanting to consider PVBM probably needs to think of
71 # define SVt_PVBM SVt_PVMG
74 /* There is collusion here with sv_clear - sv_clear exits early for SVt_NULL
75 and SVt_IV, so never reaches the clause at the end that uses
76 sv_type_details->body_size to determine whether to call safefree(). Hence
77 body_size can be set no-zero to record the size of PTEs and HEs, without
78 fear of bogus frees. */
80 #define PTE_SVSLOT SVt_IV
82 #if defined(PERL_IN_HV_C) || defined(PERL_IN_XS_APITEST)
83 #define HE_SVSLOT SVt_NULL
86 #define PERL_ARENA_ROOTS_SIZE (SVt_LAST)
88 /* typedefs to eliminate some typing */
90 typedef struct hek HEK;
92 /* Using C's structural equivalence to help emulate C++ inheritance here... */
94 /* start with 2 sv-head building blocks */
95 #define _SV_HEAD(ptrtype) \
96 ptrtype sv_any; /* pointer to body */ \
97 U32 sv_refcnt; /* how many references to us */ \
98 U32 sv_flags /* what we are */
100 #define _SV_HEAD_UNION \
104 SV* svu_rv; /* pointer to another SV */ \
105 char* svu_pv; /* pointer to malloced string */ \
112 struct STRUCT_SV { /* struct sv { */
115 #ifdef DEBUG_LEAKING_SCALARS
116 unsigned sv_debug_optype:9; /* the type of OP that allocated us */
117 unsigned sv_debug_inpad:1; /* was allocated in a pad for an OP */
118 unsigned sv_debug_cloned:1; /* was cloned for an ithread */
119 unsigned sv_debug_line:16; /* the line where we were allocated */
120 char * sv_debug_file; /* the file where we were allocated */
125 _SV_HEAD(XPVGV*); /* pointer to xpvgv body */
130 _SV_HEAD(XPVCV*); /* pointer to xpvcv body */
135 _SV_HEAD(XPVAV*); /* pointer to xpvav body */
140 _SV_HEAD(XPVHV*); /* pointer to xpvhv body */
145 _SV_HEAD(XPVIO*); /* pointer to xpvio body */
150 #undef _SV_HEAD_UNION /* ensure no pollution */
153 =head1 SV Manipulation Functions
155 =for apidoc Am|U32|SvREFCNT|SV* sv
156 Returns the value of the object's reference count.
158 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
159 Increments the reference count of the given SV.
161 All of the following SvREFCNT_inc* macros are optimized versions of
162 SvREFCNT_inc, and can be replaced with SvREFCNT_inc.
164 =for apidoc Am|SV*|SvREFCNT_inc_NN|SV* sv
165 Same as SvREFCNT_inc, but can only be used if you know I<sv>
166 is not NULL. Since we don't have to check the NULLness, it's faster
169 =for apidoc Am|void|SvREFCNT_inc_void|SV* sv
170 Same as SvREFCNT_inc, but can only be used if you don't need the
171 return value. The macro doesn't need to return a meaningful value.
173 =for apidoc Am|void|SvREFCNT_inc_void_NN|SV* sv
174 Same as SvREFCNT_inc, but can only be used if you don't need the return
175 value, and you know that I<sv> is not NULL. The macro doesn't need
176 to return a meaningful value, or check for NULLness, so it's smaller
179 =for apidoc Am|SV*|SvREFCNT_inc_simple|SV* sv
180 Same as SvREFCNT_inc, but can only be used with simple variables, not
181 expressions or pointer dereferences. Since we don't have to store a
182 temporary value, it's faster.
184 =for apidoc Am|SV*|SvREFCNT_inc_simple_NN|SV* sv
185 Same as SvREFCNT_inc_simple, but can only be used if you know I<sv>
186 is not NULL. Since we don't have to check the NULLness, it's faster
189 =for apidoc Am|void|SvREFCNT_inc_simple_void|SV* sv
190 Same as SvREFCNT_inc_simple, but can only be used if you don't need the
191 return value. The macro doesn't need to return a meaningful value.
193 =for apidoc Am|void|SvREFCNT_inc_simple_void_NN|SV* sv
194 Same as SvREFCNT_inc, but can only be used if you don't need the return
195 value, and you know that I<sv> is not NULL. The macro doesn't need
196 to return a meaningful value, or check for NULLness, so it's smaller
199 =for apidoc Am|void|SvREFCNT_dec|SV* sv
200 Decrements the reference count of the given SV.
202 =for apidoc Am|svtype|SvTYPE|SV* sv
203 Returns the type of the SV. See C<svtype>.
205 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
206 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
207 perform the upgrade if necessary. See C<svtype>.
212 #define SvANY(sv) (sv)->sv_any
213 #define SvFLAGS(sv) (sv)->sv_flags
214 #define SvREFCNT(sv) (sv)->sv_refcnt
216 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
217 # define SvREFCNT_inc(sv) \
219 SV * const _sv = (SV*)(sv); \
224 # define SvREFCNT_inc_simple(sv) \
230 # define SvREFCNT_inc_NN(sv) \
232 SV * const _sv = (SV*)(sv); \
236 # define SvREFCNT_inc_void(sv) \
238 SV * const _sv = (SV*)(sv); \
240 (void)(SvREFCNT(_sv)++); \
243 # define SvREFCNT_inc(sv) \
244 ((PL_Sv=(SV*)(sv)) ? (++(SvREFCNT(PL_Sv)),PL_Sv) : NULL)
245 # define SvREFCNT_inc_simple(sv) \
246 ((sv) ? (SvREFCNT(sv)++,(SV*)(sv)) : NULL)
247 # define SvREFCNT_inc_NN(sv) \
248 (PL_Sv=(SV*)(sv),++(SvREFCNT(PL_Sv)),PL_Sv)
249 # define SvREFCNT_inc_void(sv) \
250 (void)((PL_Sv=(SV*)(sv)) ? ++(SvREFCNT(PL_Sv)) : 0)
253 /* These guys don't need the curly blocks */
254 #define SvREFCNT_inc_simple_void(sv) STMT_START { if (sv) SvREFCNT(sv)++; } STMT_END
255 #define SvREFCNT_inc_simple_NN(sv) (++(SvREFCNT(sv)),(SV*)(sv))
256 #define SvREFCNT_inc_void_NN(sv) (void)(++SvREFCNT((SV*)(sv)))
257 #define SvREFCNT_inc_simple_void_NN(sv) (void)(++SvREFCNT((SV*)(sv)))
259 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
260 # define SvREFCNT_dec(sv) \
262 SV * const _sv = (SV*)(sv); \
264 if (SvREFCNT(_sv)) { \
265 if (--(SvREFCNT(_sv)) == 0) \
266 Perl_sv_free2(aTHX_ _sv); \
273 #define SvREFCNT_dec(sv) sv_free((SV*)(sv))
276 #define SVTYPEMASK 0xff
277 #define SvTYPE(sv) ((svtype)((sv)->sv_flags & SVTYPEMASK))
279 /* Sadly there are some parts of the core that have pointers to already-freed
280 SV heads, and rely on being able to tell that they are now free. So mark
281 them all by using a consistent macro. */
282 #define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
284 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= (mt) || (sv_upgrade(sv, mt), 1))
286 #define SVf_IOK 0x00000100 /* has valid public integer value */
287 #define SVf_NOK 0x00000200 /* has valid public numeric value */
288 #define SVf_POK 0x00000400 /* has valid public pointer value */
289 #define SVf_ROK 0x00000800 /* has a valid reference pointer */
291 #define SVp_IOK 0x00001000 /* has valid non-public integer value */
292 #define SVp_NOK 0x00002000 /* has valid non-public numeric value */
293 #define SVp_POK 0x00004000 /* has valid non-public pointer value */
294 #define SVp_SCREAM 0x00008000 /* has been studied? */
295 #define SVphv_CLONEABLE SVp_SCREAM /* PVHV (stashes) clone its objects */
296 #define SVpgv_GP SVp_SCREAM /* GV has a valid GP */
297 #define SVprv_PCS_IMPORTED SVp_SCREAM /* RV is a proxy for a constant
298 subroutine in another package. Set the
299 CvIMPORTED_CV_ON() if it needs to be
300 expanded to a real GV */
302 #define SVs_PADSTALE 0x00010000 /* lexical has gone out of scope */
303 #define SVpad_STATE 0x00010000 /* pad name is a "state" var */
304 #define SVs_PADTMP 0x00020000 /* in use as tmp */
305 #define SVpad_TYPED 0x00020000 /* pad name is a Typed Lexical */
306 #define SVs_PADMY 0x00040000 /* in use a "my" variable */
307 #define SVpad_OUR 0x00040000 /* pad name is "our" instead of "my" */
308 #define SVs_TEMP 0x00080000 /* string is stealable? */
309 #define SVs_OBJECT 0x00100000 /* is "blessed" */
310 #define SVs_GMG 0x00200000 /* has magical get method */
311 #define SVs_SMG 0x00400000 /* has magical set method */
312 #define SVs_RMG 0x00800000 /* has random magical methods */
314 #define SVf_FAKE 0x01000000 /* 0: glob or lexical is just a copy
315 1: SV head arena wasn't malloc()ed
316 2: in conjunction with SVf_READONLY
317 marks a shared hash key scalar
318 (SvLEN == 0) or a copy on write
319 string (SvLEN != 0) [SvIsCOW(sv)]
320 3: For PVCV, whether CvUNIQUE(cv)
321 refers to an eval or once only
322 [CvEVAL(cv), CvSPECIAL(cv)]
323 4: Whether the regexp pointer is in
324 fact an offset [SvREPADTMP(sv)]
325 5: On a pad name SV, that slot in the
326 frame AV is a REFCNT'ed reference
327 to a lexical from "outside". */
328 #define SVphv_REHASH SVf_FAKE /* 6: On a PVHV, hash values are being
330 #define SVf_OOK 0x02000000 /* has valid offset value. For a PVHV this
331 means that a hv_aux struct is present
332 after the main array */
333 #define SVf_BREAK 0x04000000 /* refcnt is artificially low - used by
334 SV's in final arena cleanup */
335 #define SVf_READONLY 0x08000000 /* may not be modified */
340 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
342 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
343 SVp_IOK|SVp_NOK|SVp_POK|SVpgv_GP)
345 #define PRIVSHIFT 4 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
347 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
348 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded
349 This is also set on RVs whose overloaded
350 stringification is UTF-8. This might
351 only happen as a side effect of SvPV() */
353 /* Ensure this value does not clash with the GV_ADD* flags in gv.h */
355 /* Some private flags. */
358 #define SVphv_SHAREKEYS 0x20000000 /* PVHV keys live on shared string table */
359 /* PVNV, PVMG, presumably only inside pads */
360 #define SVpad_NAME 0x40000000 /* This SV is a name in the PAD, so
361 SVpad_TYPED, SVpad_OUR and SVpad_STATE
364 #define SVpav_REAL 0x40000000 /* free old entries */
366 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
367 /* This is only set true on a PVGV when it's playing "PVBM", but is tested for
368 on any regular scalar (anything <= PVLV) */
369 #define SVpbm_VALID 0x40000000
371 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
373 /* IV, PVIV, PVNV, PVMG, PVGV and (I assume) PVLV */
374 /* Presumably IVs aren't stored in pads */
375 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
377 #define SVpav_REIFY 0x80000000 /* can become real */
379 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
381 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
382 /* PVGV when SVpbm_VALID is true */
383 #define SVpbm_TAIL 0x80000000
384 /* RV upwards. However, SVf_ROK and SVp_IOK are exclusive */
385 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
390 NV xnv_nv; /* numeric value, if any */
395 } xpad_cop_seq; /* used by pad.c for cop_sequence */
397 U32 xbm_previous; /* how many characters in string before rare? */
399 U8 xbm_rare; /* rarest character in string */
400 } xbm_s; /* fields from PVBM */
402 STRLEN xpv_cur; /* length of svu_pv as a C string */
403 STRLEN xpv_len; /* allocated size */
407 STRLEN xpv_cur; /* length of svu_pv as a C string */
408 STRLEN xpv_len; /* allocated size */
413 NV xnv_nv; /* numeric value, if any */
418 } xpad_cop_seq; /* used by pad.c for cop_sequence */
420 U32 xbm_previous; /* how many characters in string before rare? */
422 U8 xbm_rare; /* rarest character in string */
423 } xbm_s; /* fields from PVBM */
425 STRLEN xpv_cur; /* length of svu_pv as a C string */
426 STRLEN xpv_len; /* allocated size */
428 IV xivu_iv; /* integer value or pv offset */
437 STRLEN xpv_cur; /* length of svu_pv as a C string */
438 STRLEN xpv_len; /* allocated size */
440 IV xivu_iv; /* integer value or pv offset */
448 #define xiv_iv xiv_u.xivu_iv
452 NV xnv_nv; /* numeric value, if any */
457 } xpad_cop_seq; /* used by pad.c for cop_sequence */
459 U32 xbm_previous; /* how many characters in string before rare? */
461 U8 xbm_rare; /* rarest character in string */
462 } xbm_s; /* fields from PVBM */
464 STRLEN xpv_cur; /* length of svu_pv as a C string */
465 STRLEN xpv_len; /* allocated size */
468 UV xuvu_uv; /* unsigned value or pv offset */
474 #define xuv_uv xuv_u.xuvu_uv
478 NV xnv_nv; /* numeric value, if any */
483 } xpad_cop_seq; /* used by pad.c for cop_sequence */
485 U32 xbm_previous; /* how many characters in string before rare? */
487 U8 xbm_rare; /* rarest character in string */
488 } xbm_s; /* fields from PVBM */
490 STRLEN xpv_cur; /* length of svu_pv as a C string */
491 STRLEN xpv_len; /* allocated size */
493 IV xivu_iv; /* integer value or pv offset */
501 /* These structure must match the beginning of struct xpvhv in hv.h. */
504 NV xnv_nv; /* numeric value, if any */
509 } xpad_cop_seq; /* used by pad.c for cop_sequence */
511 U32 xbm_previous; /* how many characters in string before rare? */
513 U8 xbm_rare; /* rarest character in string */
514 } xbm_s; /* fields from PVBM */
516 STRLEN xpv_cur; /* length of svu_pv as a C string */
517 STRLEN xpv_len; /* allocated size */
519 IV xivu_iv; /* integer value or pv offset */
526 MAGIC* xmg_magic; /* linked list of magicalness */
527 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
529 HV* xmg_stash; /* class package */
534 NV xnv_nv; /* numeric value, if any */
539 } xpad_cop_seq; /* used by pad.c for cop_sequence */
541 U32 xbm_previous; /* how many characters in string before rare? */
543 U8 xbm_rare; /* rarest character in string */
544 } xbm_s; /* fields from PVBM */
546 STRLEN xpv_cur; /* length of svu_pv as a C string */
547 STRLEN xpv_len; /* allocated size */
549 IV xivu_iv; /* integer value or pv offset */
553 HEK * xivu_namehek; /* GvNAME */
556 MAGIC* xmg_magic; /* linked list of magicalness */
557 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
559 HV* xmg_stash; /* class package */
564 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
565 * y=alem/helem/iter t=tie T=tied HE */
568 /* This structure works in 3 ways - regular scalar, GV with GP, or fast
573 HV * xgv_stash; /* The stash of this GV */
577 } xpad_cop_seq; /* used by pad.c for cop_sequence */
579 U32 xbm_previous; /* how many characters in string before rare? */
581 U8 xbm_rare; /* rarest character in string */
582 } xbm_s; /* fields from PVBM */
584 STRLEN xpv_cur; /* xgv_flags */
585 STRLEN xpv_len; /* 0 */
590 I32 xivu_i32; /* is this constant pattern being useful? */
591 HEK * xivu_namehek; /* GvNAME */
594 MAGIC* xmg_magic; /* linked list of magicalness */
595 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
597 HV* xmg_stash; /* class package */
601 /* This structure must match XPVCV in cv.h */
603 typedef U16 cv_flags_t;
607 NV xnv_nv; /* numeric value, if any */
612 } xpad_cop_seq; /* used by pad.c for cop_sequence */
614 U32 xbm_previous; /* how many characters in string before rare? */
616 U8 xbm_rare; /* rarest character in string */
617 } xbm_s; /* fields from PVBM */
619 STRLEN xpv_cur; /* length of svu_pv as a C string */
620 STRLEN xpv_len; /* allocated size */
622 IV xivu_iv; /* PVFMs use the pv offset */
629 MAGIC* xmg_magic; /* linked list of magicalness */
630 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
632 HV* xmg_stash; /* class package */
641 void (*xcv_xsub) (pTHX_ CV*);
647 U32 xcv_outside_seq; /* the COP sequence (at the point of our
648 * compilation) in the lexically enclosing
650 cv_flags_t xcv_flags;
655 STRLEN xpv_cur; /* length of svu_pv as a C string */
656 STRLEN xpv_len; /* allocated size */
658 IV xivu_iv; /* PVFMs use the pv offset */
665 MAGIC* xmg_magic; /* linked list of magicalness */
666 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
668 HV* xmg_stash; /* class package */
677 void (*xcv_xsub) (pTHX_ CV*);
683 U32 xcv_outside_seq; /* the COP sequence (at the point of our
684 * compilation) in the lexically enclosing
686 cv_flags_t xcv_flags;
692 NV xnv_nv; /* numeric value, if any */
697 } xpad_cop_seq; /* used by pad.c for cop_sequence */
699 U32 xbm_previous; /* how many characters in string before rare? */
701 U8 xbm_rare; /* rarest character in string */
702 } xbm_s; /* fields from PVBM */
704 STRLEN xpv_cur; /* length of svu_pv as a C string */
705 STRLEN xpv_len; /* allocated size */
707 IV xivu_iv; /* integer value or pv offset */
714 MAGIC* xmg_magic; /* linked list of magicalness */
715 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
717 HV* xmg_stash; /* class package */
719 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
720 PerlIO * xio_ofp; /* but sockets need separate streams */
721 /* Cray addresses everything by word boundaries (64 bits) and
722 * code and data pointers cannot be mixed (which is exactly what
723 * Perl_filter_add() tries to do with the dirp), hence the following
724 * union trick (as suggested by Gurusamy Sarathy).
725 * For further information see Geir Johansen's problem report titled
726 [ID 20000612.002] Perl problem on Cray system
727 * The any pointer (known as IoANY()) will also be a good place
728 * to hang any IO disciplines to.
731 DIR * xiou_dirp; /* for opendir, readdir, etc */
732 void * xiou_any; /* for alignment */
734 IV xio_lines; /* $. */
735 IV xio_page; /* $% */
736 IV xio_page_len; /* $= */
737 IV xio_lines_left; /* $- */
738 char * xio_top_name; /* $^ */
739 GV * xio_top_gv; /* $^ */
740 char * xio_fmt_name; /* $~ */
741 GV * xio_fmt_gv; /* $~ */
742 char * xio_bottom_name;/* $^B */
743 GV * xio_bottom_gv; /* $^B */
744 short xio_subprocess; /* -| or |- */
748 #define xio_dirp xio_dirpu.xiou_dirp
749 #define xio_any xio_dirpu.xiou_any
751 #define IOf_ARGV 1 /* this fp iterates over ARGV */
752 #define IOf_START 2 /* check for null ARGV and substitute '-' */
753 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
754 #define IOf_DIDTOP 8 /* just did top of form */
755 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
756 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
757 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
759 /* The following macros define implementation-independent predicates on SVs. */
762 =for apidoc Am|U32|SvNIOK|SV* sv
763 Returns a U32 value indicating whether the SV contains a number, integer or
766 =for apidoc Am|U32|SvNIOKp|SV* sv
767 Returns a U32 value indicating whether the SV contains a number, integer or
768 double. Checks the B<private> setting. Use C<SvNIOK>.
770 =for apidoc Am|void|SvNIOK_off|SV* sv
771 Unsets the NV/IV status of an SV.
773 =for apidoc Am|U32|SvOK|SV* sv
774 Returns a U32 value indicating whether the value is an SV. It also tells
775 whether the value is defined or not.
777 =for apidoc Am|U32|SvIOKp|SV* sv
778 Returns a U32 value indicating whether the SV contains an integer. Checks
779 the B<private> setting. Use C<SvIOK>.
781 =for apidoc Am|U32|SvNOKp|SV* sv
782 Returns a U32 value indicating whether the SV contains a double. Checks the
783 B<private> setting. Use C<SvNOK>.
785 =for apidoc Am|U32|SvPOKp|SV* sv
786 Returns a U32 value indicating whether the SV contains a character string.
787 Checks the B<private> setting. Use C<SvPOK>.
789 =for apidoc Am|U32|SvIOK|SV* sv
790 Returns a U32 value indicating whether the SV contains an integer.
792 =for apidoc Am|void|SvIOK_on|SV* sv
793 Tells an SV that it is an integer.
795 =for apidoc Am|void|SvIOK_off|SV* sv
796 Unsets the IV status of an SV.
798 =for apidoc Am|void|SvIOK_only|SV* sv
799 Tells an SV that it is an integer and disables all other OK bits.
801 =for apidoc Am|void|SvIOK_only_UV|SV* sv
802 Tells and SV that it is an unsigned integer and disables all other OK bits.
804 =for apidoc Am|bool|SvIOK_UV|SV* sv
805 Returns a boolean indicating whether the SV contains an unsigned integer.
807 =for apidoc Am|bool|SvUOK|SV* sv
808 Returns a boolean indicating whether the SV contains an unsigned integer.
810 =for apidoc Am|bool|SvIOK_notUV|SV* sv
811 Returns a boolean indicating whether the SV contains a signed integer.
813 =for apidoc Am|U32|SvNOK|SV* sv
814 Returns a U32 value indicating whether the SV contains a double.
816 =for apidoc Am|void|SvNOK_on|SV* sv
817 Tells an SV that it is a double.
819 =for apidoc Am|void|SvNOK_off|SV* sv
820 Unsets the NV status of an SV.
822 =for apidoc Am|void|SvNOK_only|SV* sv
823 Tells an SV that it is a double and disables all other OK bits.
825 =for apidoc Am|U32|SvPOK|SV* sv
826 Returns a U32 value indicating whether the SV contains a character
829 =for apidoc Am|void|SvPOK_on|SV* sv
830 Tells an SV that it is a string.
832 =for apidoc Am|void|SvPOK_off|SV* sv
833 Unsets the PV status of an SV.
835 =for apidoc Am|void|SvPOK_only|SV* sv
836 Tells an SV that it is a string and disables all other OK bits.
837 Will also turn off the UTF-8 status.
839 =for apidoc Am|bool|SvVOK|SV* sv
840 Returns a boolean indicating whether the SV contains a v-string.
842 =for apidoc Am|U32|SvOOK|SV* sv
843 Returns a U32 indicating whether the SvIVX is a valid offset value for
844 the SvPVX. This hack is used internally to speed up removal of characters
845 from the beginning of a SvPV. When SvOOK is true, then the start of the
846 allocated string buffer is really (SvPVX - SvIVX).
848 =for apidoc Am|U32|SvROK|SV* sv
849 Tests if the SV is an RV.
851 =for apidoc Am|void|SvROK_on|SV* sv
852 Tells an SV that it is an RV.
854 =for apidoc Am|void|SvROK_off|SV* sv
855 Unsets the RV status of an SV.
857 =for apidoc Am|SV*|SvRV|SV* sv
858 Dereferences an RV to return the SV.
860 =for apidoc Am|IV|SvIVX|SV* sv
861 Returns the raw value in the SV's IV slot, without checks or conversions.
862 Only use when you are sure SvIOK is true. See also C<SvIV()>.
864 =for apidoc Am|UV|SvUVX|SV* sv
865 Returns the raw value in the SV's UV slot, without checks or conversions.
866 Only use when you are sure SvIOK is true. See also C<SvUV()>.
868 =for apidoc Am|NV|SvNVX|SV* sv
869 Returns the raw value in the SV's NV slot, without checks or conversions.
870 Only use when you are sure SvNOK is true. See also C<SvNV()>.
872 =for apidoc Am|char*|SvPVX|SV* sv
873 Returns a pointer to the physical string in the SV. The SV must contain a
876 =for apidoc Am|STRLEN|SvCUR|SV* sv
877 Returns the length of the string which is in the SV. See C<SvLEN>.
879 =for apidoc Am|STRLEN|SvLEN|SV* sv
880 Returns the size of the string buffer in the SV, not including any part
881 attributable to C<SvOOK>. See C<SvCUR>.
883 =for apidoc Am|char*|SvEND|SV* sv
884 Returns a pointer to the last character in the string which is in the SV.
885 See C<SvCUR>. Access the character as *(SvEND(sv)).
887 =for apidoc Am|HV*|SvSTASH|SV* sv
888 Returns the stash of the SV.
890 =for apidoc Am|void|SvIV_set|SV* sv|IV val
891 Set the value of the IV pointer in sv to val. It is possible to perform
892 the same function of this macro with an lvalue assignment to C<SvIVX>.
893 With future Perls, however, it will be more efficient to use
894 C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
896 =for apidoc Am|void|SvNV_set|SV* sv|NV val
897 Set the value of the NV pointer in sv to val. See C<SvIV_set>.
899 =for apidoc Am|void|SvPV_set|SV* sv|char* val
900 Set the value of the PV pointer in sv to val. See C<SvIV_set>.
902 =for apidoc Am|void|SvUV_set|SV* sv|UV val
903 Set the value of the UV pointer in sv to val. See C<SvIV_set>.
905 =for apidoc Am|void|SvRV_set|SV* sv|SV* val
906 Set the value of the RV pointer in sv to val. See C<SvIV_set>.
908 =for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
909 Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>.
911 =for apidoc Am|void|SvSTASH_set|SV* sv|HV* val
912 Set the value of the STASH pointer in sv to val. See C<SvIV_set>.
914 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
915 Set the current length of the string which is in the SV. See C<SvCUR>
918 =for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
919 Set the actual length of the string which is in the SV. See C<SvIV_set>.
924 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
925 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
926 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
927 SVp_IOK|SVp_NOK|SVf_IVisUV))
929 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
930 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
931 #define assert_not_glob(sv) ({assert(!isGV_with_GP(sv));}),
933 #define assert_not_ROK(sv)
934 #define assert_not_glob(sv)
937 #define SvOK(sv) ((SvTYPE(sv) == SVt_BIND) \
938 ? (SvFLAGS(SvRV(sv)) & SVf_OK) \
939 : (SvFLAGS(sv) & SVf_OK))
940 #define SvOK_off(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
941 SvFLAGS(sv) &= ~(SVf_OK| \
942 SVf_IVisUV|SVf_UTF8), \
944 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
945 SvFLAGS(sv) &= ~(SVf_OK| \
949 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
950 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
951 #define SvIOKp_on(sv) (assert_not_glob(sv) SvRELEASE_IVX(sv), \
952 SvFLAGS(sv) |= SVp_IOK)
953 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
954 #define SvNOKp_on(sv) (assert_not_glob(sv) SvFLAGS(sv) |= SVp_NOK)
955 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
956 #define SvPOKp_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
957 SvFLAGS(sv) |= SVp_POK)
959 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
960 #define SvIOK_on(sv) (assert_not_glob(sv) SvRELEASE_IVX(sv), \
961 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
962 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
963 #define SvIOK_only(sv) (SvOK_off(sv), \
964 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
965 #define SvIOK_only_UV(sv) (assert_not_glob(sv) SvOK_off_exc_UV(sv), \
966 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
968 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
969 == (SVf_IOK|SVf_IVisUV))
970 #define SvUOK(sv) SvIOK_UV(sv)
971 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
974 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
975 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
976 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
978 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
979 #define SvNOK_on(sv) (assert_not_glob(sv) \
980 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
981 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
982 #define SvNOK_only(sv) (SvOK_off(sv), \
983 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
986 =for apidoc Am|U32|SvUTF8|SV* sv
987 Returns a U32 value indicating whether the SV contains UTF-8 encoded data.
988 Call this after SvPV() in case any call to string overloading updates the
991 =for apidoc Am|void|SvUTF8_on|SV *sv
992 Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
993 Do not use frivolously.
995 =for apidoc Am|void|SvUTF8_off|SV *sv
996 Unsets the UTF-8 status of an SV.
998 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
999 Tells an SV that it is a string and disables all other OK bits,
1000 and leaves the UTF-8 status as it was.
1005 /* Ensure the return value of this macro does not clash with the GV_ADD* flags
1007 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
1008 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
1009 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
1011 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
1012 #define SvPOK_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
1013 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
1014 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
1015 #define SvPOK_only(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
1016 SvFLAGS(sv) &= ~(SVf_OK| \
1017 SVf_IVisUV|SVf_UTF8), \
1018 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
1019 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
1020 SvFLAGS(sv) &= ~(SVf_OK| \
1022 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
1024 #define SvVOK(sv) (SvMAGICAL(sv) \
1025 && mg_find(sv,PERL_MAGIC_vstring))
1026 /* returns the vstring magic, if any */
1027 #define SvVSTRING_mg(sv) (SvMAGICAL(sv) \
1028 ? mg_find(sv,PERL_MAGIC_vstring) : NULL)
1030 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
1031 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
1032 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
1034 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
1035 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
1036 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
1038 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
1039 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
1040 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK))
1042 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
1043 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
1044 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
1046 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
1047 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
1048 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
1050 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
1051 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
1052 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
1054 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
1055 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
1056 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
1058 #define SvAMAGIC(sv) (SvROK(sv) && (SvFLAGS(SvRV(sv)) & SVf_AMAGIC))
1059 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1060 # define SvAMAGIC_on(sv) ({ SV * const kloink = sv; \
1061 assert(SvROK(kloink)); \
1062 SvFLAGS(SvRV(kloink)) |= SVf_AMAGIC; \
1064 # define SvAMAGIC_off(sv) ({ SV * const kloink = sv; \
1066 SvFLAGS(SvRV(kloink)) &= ~SVf_AMAGIC;\
1069 # define SvAMAGIC_on(sv) (SvFLAGS(SvRV(sv)) |= SVf_AMAGIC)
1070 # define SvAMAGIC_off(sv) \
1071 (SvROK(sv) && (SvFLAGS(SvRV(sv)) &= ~SVf_AMAGIC))
1075 =for apidoc Am|char*|SvGAMAGIC|SV* sv
1077 Returns true if the SV has get magic or overloading. If either is true then
1078 the scalar is active data, and has the potential to return a new value every
1079 time it is accessed. Hence you must be careful to only read it once per user
1080 logical operation and work with that returned value. If neither is true then
1081 the scalar's value cannot change unless written to.
1086 #define SvGAMAGIC(sv) (SvGMAGICAL(sv) || SvAMAGIC(sv))
1088 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
1090 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
1091 == (SVf_ROK|SVprv_WEAKREF))
1092 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
1093 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
1095 #define SvPCS_IMPORTED(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_PCS_IMPORTED)) \
1096 == (SVf_ROK|SVprv_PCS_IMPORTED))
1097 #define SvPCS_IMPORTED_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_PCS_IMPORTED))
1098 #define SvPCS_IMPORTED_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_PCS_IMPORTED))
1100 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
1102 #define SvPADSTALE(sv) (SvFLAGS(sv) & SVs_PADSTALE)
1103 #define SvPADSTALE_on(sv) (SvFLAGS(sv) |= SVs_PADSTALE)
1104 #define SvPADSTALE_off(sv) (SvFLAGS(sv) &= ~SVs_PADSTALE)
1106 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
1107 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
1108 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
1110 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
1111 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY)
1113 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
1114 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
1115 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
1117 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
1118 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
1119 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
1121 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
1122 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
1123 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
1125 #define SvSCREAM(sv) ((SvFLAGS(sv) & (SVp_SCREAM|SVp_POK)) == (SVp_SCREAM|SVp_POK))
1126 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
1127 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
1129 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
1130 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
1131 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
1133 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
1134 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
1135 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
1137 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1138 # define SvVALID(sv) ({ SV *const thwacke = (SV *) (sv); \
1139 if (SvFLAGS(thwacke) & SVpbm_VALID) \
1140 assert(!isGV_with_GP(thwacke)); \
1141 (SvFLAGS(thwacke) & SVpbm_VALID); \
1143 # define SvVALID_on(sv) ({ SV *const thwacke = (SV *) (sv); \
1144 assert(!isGV_with_GP(thwacke)); \
1145 (SvFLAGS(thwacke) |= SVpbm_VALID); \
1147 # define SvVALID_off(sv) ({ SV *const thwacke = (SV *) (sv); \
1148 assert(!isGV_with_GP(thwacke)); \
1149 (SvFLAGS(thwacke) &= ~SVpbm_VALID); \
1152 # define SvTAIL(sv) ({ SV *const _svi = (SV *) (sv); \
1153 assert(SvTYPE(_svi) != SVt_PVAV); \
1154 assert(SvTYPE(_svi) != SVt_PVHV); \
1155 (SvFLAGS(sv) & (SVpbm_TAIL|SVpbm_VALID)) \
1156 == (SVpbm_TAIL|SVpbm_VALID); \
1159 # define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
1160 # define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
1161 # define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
1162 # define SvTAIL(sv) ((SvFLAGS(sv) & (SVpbm_TAIL|SVpbm_VALID)) \
1163 == (SVpbm_TAIL|SVpbm_VALID))
1166 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
1167 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
1171 /* The following uses the FAKE flag to show that a regex pointer is infact
1172 its own offset in the regexpad for ithreads */
1173 #define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
1174 #define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
1175 #define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
1178 #define SvPAD_TYPED(sv) \
1179 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_TYPED)) == (SVpad_NAME|SVpad_TYPED))
1181 #define SvPAD_OUR(sv) \
1182 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_OUR)) == (SVpad_NAME|SVpad_OUR))
1184 #define SvPAD_STATE(sv) \
1185 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_STATE)) == (SVpad_NAME|SVpad_STATE))
1187 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1188 # define SvPAD_TYPED_on(sv) ({ \
1189 SV *const whap = (SV *) (sv); \
1190 assert(SvTYPE(whap) == SVt_PVMG); \
1191 (SvFLAGS(whap) |= SVpad_NAME|SVpad_TYPED); \
1193 #define SvPAD_OUR_on(sv) ({ \
1194 SV *const whap = (SV *) (sv); \
1195 assert(SvTYPE(whap) == SVt_PVMG); \
1196 (SvFLAGS(whap) |= SVpad_NAME|SVpad_OUR); \
1198 #define SvPAD_STATE_on(sv) ({ \
1199 SV *const whap = (SV *) (sv); \
1200 assert(SvTYPE(whap) == SVt_PVNV || SvTYPE(whap) == SVt_PVMG); \
1201 (SvFLAGS(whap) |= SVpad_NAME|SVpad_STATE); \
1204 # define SvPAD_TYPED_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_TYPED)
1205 # define SvPAD_OUR_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_OUR)
1206 # define SvPAD_STATE_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_STATE)
1209 #define SvOURSTASH(sv) \
1210 (SvPAD_OUR(sv) ? ((XPVMG*) SvANY(sv))->xmg_u.xmg_ourstash : NULL)
1211 #define SvOURSTASH_set(sv, st) \
1213 assert(SvTYPE(sv) == SVt_PVMG); \
1214 ((XPVMG*) SvANY(sv))->xmg_u.xmg_ourstash = st; \
1217 #ifdef PERL_DEBUG_COW
1218 #define SvRV(sv) (0 + (sv)->sv_u.svu_rv)
1220 #define SvRV(sv) ((sv)->sv_u.svu_rv)
1222 #define SvRVx(sv) SvRV(sv)
1224 #ifdef PERL_DEBUG_COW
1225 /* Need -0.0 for SvNVX to preserve IEEE FP "negative zero" because
1226 +0.0 + -0.0 => +0.0 but -0.0 + -0.0 => -0.0 */
1227 # define SvIVX(sv) (0 + ((XPVIV*) SvANY(sv))->xiv_iv)
1228 # define SvUVX(sv) (0 + ((XPVUV*) SvANY(sv))->xuv_uv)
1229 # define SvNVX(sv) (-0.0 + ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv)
1230 /* Don't test the core XS code yet. */
1231 # if defined (PERL_CORE) && PERL_DEBUG_COW > 1
1232 # define SvPVX(sv) (0 + (assert(!SvREADONLY(sv)), (sv)->sv_u.svu_pv))
1234 # define SvPVX(sv) SvPVX_mutable(sv)
1236 # define SvCUR(sv) (0 + ((XPV*) SvANY(sv))->xpv_cur)
1237 # define SvLEN(sv) (0 + ((XPV*) SvANY(sv))->xpv_len)
1238 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1241 # define SvMAGIC(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_u.xmg_magic))
1242 # define SvSTASH(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
1244 # define SvMAGIC(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic)
1245 # define SvSTASH(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_stash)
1248 # define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
1249 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1251 # if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1252 /* These get expanded inside other macros that already use a variable _sv */
1253 # define SvPVX(sv) \
1254 (*({ SV *const _svi = (SV *) (sv); \
1255 assert(SvTYPE(_svi) >= SVt_PV); \
1256 assert(SvTYPE(_svi) != SVt_PVAV); \
1257 assert(SvTYPE(_svi) != SVt_PVHV); \
1258 assert(!isGV_with_GP(_svi)); \
1259 &((_svi)->sv_u.svu_pv); \
1261 # define SvCUR(sv) \
1262 (*({ SV *const _svi = (SV *) (sv); \
1263 assert(SvTYPE(_svi) >= SVt_PV); \
1264 assert(SvTYPE(_svi) != SVt_PVAV); \
1265 assert(SvTYPE(_svi) != SVt_PVHV); \
1266 assert(!isGV_with_GP(_svi)); \
1267 &(((XPV*) SvANY(_svi))->xpv_cur); \
1269 # define SvIVX(sv) \
1270 (*({ SV *const _svi = (SV *) (sv); \
1271 assert(SvTYPE(_svi) == SVt_IV || SvTYPE(_svi) >= SVt_PVIV); \
1272 assert(SvTYPE(_svi) != SVt_PVAV); \
1273 assert(SvTYPE(_svi) != SVt_PVHV); \
1274 assert(SvTYPE(_svi) != SVt_PVCV); \
1275 assert(!isGV_with_GP(_svi)); \
1276 &(((XPVIV*) SvANY(_svi))->xiv_iv); \
1278 # define SvUVX(sv) \
1279 (*({ SV *const _svi = (SV *) (sv); \
1280 assert(SvTYPE(_svi) == SVt_IV || SvTYPE(_svi) >= SVt_PVIV); \
1281 assert(SvTYPE(_svi) != SVt_PVAV); \
1282 assert(SvTYPE(_svi) != SVt_PVHV); \
1283 assert(SvTYPE(_svi) != SVt_PVCV); \
1284 assert(!isGV_with_GP(_svi)); \
1285 &(((XPVUV*) SvANY(_svi))->xuv_uv); \
1287 # define SvNVX(sv) \
1288 (*({ SV *const _svi = (SV *) (sv); \
1289 assert(SvTYPE(_svi) == SVt_NV || SvTYPE(_svi) >= SVt_PVNV); \
1290 assert(SvTYPE(_svi) != SVt_PVAV); \
1291 assert(SvTYPE(_svi) != SVt_PVHV); \
1292 assert(SvTYPE(_svi) != SVt_PVCV); \
1293 assert(SvTYPE(_svi) != SVt_PVFM); \
1294 assert(!isGV_with_GP(_svi)); \
1295 &(((XPVNV*) SvANY(_svi))->xnv_u.xnv_nv); \
1297 # define SvMAGIC(sv) \
1298 (*({ SV *const _svi = (SV *) (sv); \
1299 assert(SvTYPE(_svi) >= SVt_PVMG); \
1300 if(SvTYPE(_svi) == SVt_PVMG) \
1301 assert(!SvPAD_OUR(_svi)); \
1302 &(((XPVMG*) SvANY(_svi))->xmg_u.xmg_magic); \
1304 # define SvSTASH(sv) \
1305 (*({ SV *const _svi = (SV *) (sv); \
1306 assert(SvTYPE(_svi) >= SVt_PVMG); \
1307 &(((XPVMG*) SvANY(_svi))->xmg_stash); \
1310 # define SvPVX(sv) ((sv)->sv_u.svu_pv)
1311 # define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
1312 # define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
1313 # define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
1314 # define SvNVX(sv) ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv
1315 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic
1316 # define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
1321 /* Given that these two are new, there can't be any existing code using them
1323 # define SvPVX_mutable(sv) (0 + (sv)->sv_u.svu_pv)
1324 # define SvPVX_const(sv) ((const char*)(0 + (sv)->sv_u.svu_pv))
1326 /* Except for the poison code, which uses & to scribble over the pointer after
1327 free() is called. */
1328 # define SvPVX_mutable(sv) ((sv)->sv_u.svu_pv)
1329 # define SvPVX_const(sv) ((const char*)((sv)->sv_u.svu_pv))
1332 #define SvIVXx(sv) SvIVX(sv)
1333 #define SvUVXx(sv) SvUVX(sv)
1334 #define SvNVXx(sv) SvNVX(sv)
1335 #define SvPVXx(sv) SvPVX(sv)
1336 #define SvLENx(sv) SvLEN(sv)
1337 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
1340 /* Ask a scalar nicely to try to become an IV, if possible.
1341 Not guaranteed to stay returning void */
1342 /* Macro won't actually call sv_2iv if already IOK */
1343 #define SvIV_please(sv) \
1344 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
1345 (void) SvIV(sv); } STMT_END
1346 #define SvIV_set(sv, val) \
1347 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1348 assert(SvTYPE(sv) != SVt_PVAV); \
1349 assert(SvTYPE(sv) != SVt_PVHV); \
1350 assert(SvTYPE(sv) != SVt_PVCV); \
1351 assert(!isGV_with_GP(sv)); \
1352 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
1353 #define SvNV_set(sv, val) \
1354 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
1355 assert(SvTYPE(sv) != SVt_PVAV); assert(SvTYPE(sv) != SVt_PVHV); \
1356 assert(SvTYPE(sv) != SVt_PVCV); assert(SvTYPE(sv) != SVt_PVFM); \
1357 assert(!isGV_with_GP(sv)); \
1358 (((XPVNV*)SvANY(sv))->xnv_u.xnv_nv = (val)); } STMT_END
1359 #define SvPV_set(sv, val) \
1360 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1361 assert(SvTYPE(sv) != SVt_PVAV); \
1362 assert(SvTYPE(sv) != SVt_PVHV); \
1363 assert(!isGV_with_GP(sv)); \
1364 ((sv)->sv_u.svu_pv = (val)); } STMT_END
1365 #define SvUV_set(sv, val) \
1366 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1367 assert(SvTYPE(sv) != SVt_PVAV); \
1368 assert(SvTYPE(sv) != SVt_PVHV); \
1369 assert(SvTYPE(sv) != SVt_PVCV); \
1370 assert(!isGV_with_GP(sv)); \
1371 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
1372 #define SvRV_set(sv, val) \
1373 STMT_START { assert(SvTYPE(sv) >= SVt_RV); \
1374 assert(!isGV_with_GP(sv)); \
1375 ((sv)->sv_u.svu_rv = (val)); } STMT_END
1376 #define SvMAGIC_set(sv, val) \
1377 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1378 (((XPVMG*)SvANY(sv))->xmg_u.xmg_magic = (val)); } STMT_END
1379 #define SvSTASH_set(sv, val) \
1380 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1381 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
1382 #define SvCUR_set(sv, val) \
1383 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1384 assert(SvTYPE(sv) != SVt_PVAV); \
1385 assert(SvTYPE(sv) != SVt_PVHV); \
1386 assert(!isGV_with_GP(sv)); \
1387 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
1388 #define SvLEN_set(sv, val) \
1389 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1390 assert(SvTYPE(sv) != SVt_PVAV); \
1391 assert(SvTYPE(sv) != SVt_PVHV); \
1392 assert(!isGV_with_GP(sv)); \
1393 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
1394 #define SvEND_set(sv, val) \
1395 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1396 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
1398 #define SvPV_renew(sv,n) \
1399 STMT_START { SvLEN_set(sv, n); \
1400 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
1401 (char*)saferealloc((Malloc_t)SvPVX(sv), \
1402 (MEM_SIZE)((n))))); \
1405 #define SvPV_shrink_to_cur(sv) STMT_START { \
1406 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
1407 SvPV_renew(sv, _lEnGtH); \
1410 #define SvPV_free(sv) \
1412 assert(SvTYPE(sv) >= SVt_PV); \
1415 SvPV_set(sv, SvPVX_mutable(sv) - SvIVX(sv)); \
1416 SvFLAGS(sv) &= ~SVf_OOK; \
1418 Safefree(SvPVX(sv)); \
1423 #define PERL_FBM_TABLE_OFFSET 1 /* Number of bytes between EOS and table */
1425 /* SvPOKp not SvPOK in the assertion because the string can be tainted! eg
1428 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1429 # define BmFLAGS(sv) \
1430 (*({ SV *const uggh = (SV *) (sv); \
1431 assert(SvTYPE(uggh) == SVt_PVGV); \
1432 assert(SvVALID(uggh)); \
1433 &(((XPVGV*) SvANY(uggh))->xnv_u.xbm_s.xbm_flags); \
1435 # define BmRARE(sv) \
1436 (*({ SV *const uggh = (SV *) (sv); \
1437 assert(SvTYPE(uggh) == SVt_PVGV); \
1438 assert(SvVALID(uggh)); \
1439 &(((XPVGV*) SvANY(uggh))->xnv_u.xbm_s.xbm_rare); \
1441 # define BmUSEFUL(sv) \
1442 (*({ SV *const uggh = (SV *) (sv); \
1443 assert(SvTYPE(uggh) == SVt_PVGV); \
1444 assert(SvVALID(uggh)); \
1445 assert(!SvIOK(uggh)); \
1446 &(((XPVGV*) SvANY(uggh))->xiv_u.xivu_i32); \
1448 # define BmPREVIOUS(sv) \
1449 (*({ SV *const uggh = (SV *) (sv); \
1450 assert(SvTYPE(uggh) == SVt_PVGV); \
1451 assert(SvVALID(uggh)); \
1452 &(((XPVGV*) SvANY(uggh))->xnv_u.xbm_s.xbm_previous); \
1455 # define BmFLAGS(sv) ((XPVGV*) SvANY(sv))->xnv_u.xbm_s.xbm_flags
1456 # define BmRARE(sv) ((XPVGV*) SvANY(sv))->xnv_u.xbm_s.xbm_rare
1457 # define BmUSEFUL(sv) ((XPVGV*) SvANY(sv))->xiv_u.xivu_i32
1458 # define BmPREVIOUS(sv) ((XPVGV*) SvANY(sv))->xnv_u.xbm_s.xbm_previous
1462 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
1464 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
1465 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
1466 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
1467 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
1469 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
1470 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
1471 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
1472 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
1473 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
1474 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
1475 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
1476 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
1477 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
1478 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
1479 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
1480 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
1481 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
1482 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
1483 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
1484 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1485 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1487 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
1488 #define IoTYPE_RDONLY '<'
1489 #define IoTYPE_WRONLY '>'
1490 #define IoTYPE_RDWR '+'
1491 #define IoTYPE_APPEND 'a'
1492 #define IoTYPE_PIPE '|'
1493 #define IoTYPE_STD '-' /* stdin or stdout */
1494 #define IoTYPE_SOCKET 's'
1495 #define IoTYPE_CLOSED ' '
1496 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1497 #define IoTYPE_NUMERIC '#' /* fdopen */
1500 =for apidoc Am|bool|SvTAINTED|SV* sv
1501 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
1504 =for apidoc Am|void|SvTAINTED_on|SV* sv
1505 Marks an SV as tainted if tainting is enabled.
1507 =for apidoc Am|void|SvTAINTED_off|SV* sv
1508 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1509 some of Perl's fundamental security features. XS module authors should not
1510 use this function unless they fully understand all the implications of
1511 unconditionally untainting the value. Untainting should be done in the
1512 standard perl fashion, via a carefully crafted regexp, rather than directly
1513 untainting variables.
1515 =for apidoc Am|void|SvTAINT|SV* sv
1516 Taints an SV if tainting is enabled.
1521 #define sv_taint(sv) sv_magic((sv), NULL, PERL_MAGIC_taint, NULL, 0)
1523 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1524 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
1525 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
1527 #define SvTAINT(sv) \
1529 if (PL_tainting) { \
1536 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
1537 Like C<SvPV> but will force the SV into containing just a string
1538 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1541 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
1542 Like C<SvPV> but will force the SV into containing just a string
1543 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1544 directly. Doesn't process magic.
1546 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
1547 Returns a pointer to the string in the SV, or a stringified form of
1548 the SV if the SV does not contain a string. The SV may cache the
1549 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
1550 C<SvPVx> for a version which guarantees to evaluate sv only once.
1552 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
1553 A version of C<SvPV> which guarantees to evaluate sv only once.
1555 =for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1556 Like C<SvPV> but doesn't process magic.
1558 =for apidoc Am|char*|SvPV_nolen|SV* sv
1559 Returns a pointer to the string in the SV, or a stringified form of
1560 the SV if the SV does not contain a string. The SV may cache the
1561 stringified form becoming C<SvPOK>. Handles 'get' magic.
1563 =for apidoc Am|IV|SvIV|SV* sv
1564 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
1565 version which guarantees to evaluate sv only once.
1567 =for apidoc Am|IV|SvIV_nomg|SV* sv
1568 Like C<SvIV> but doesn't process magic.
1570 =for apidoc Am|IV|SvIVx|SV* sv
1571 Coerces the given SV to an integer and returns it. Guarantees to evaluate
1572 sv only once. Use the more efficient C<SvIV> otherwise.
1574 =for apidoc Am|NV|SvNV|SV* sv
1575 Coerce the given SV to a double and return it. See C<SvNVx> for a version
1576 which guarantees to evaluate sv only once.
1578 =for apidoc Am|NV|SvNVx|SV* sv
1579 Coerces the given SV to a double and returns it. Guarantees to evaluate
1580 sv only once. Use the more efficient C<SvNV> otherwise.
1582 =for apidoc Am|UV|SvUV|SV* sv
1583 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
1584 for a version which guarantees to evaluate sv only once.
1586 =for apidoc Am|UV|SvUV_nomg|SV* sv
1587 Like C<SvUV> but doesn't process magic.
1589 =for apidoc Am|UV|SvUVx|SV* sv
1590 Coerces the given SV to an unsigned integer and returns it. Guarantees to
1591 evaluate sv only once. Use the more efficient C<SvUV> otherwise.
1593 =for apidoc Am|bool|SvTRUE|SV* sv
1594 Returns a boolean indicating whether Perl would evaluate the SV as true or
1595 false, defined or undefined. Does not handle 'get' magic.
1597 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
1598 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1600 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
1601 Like C<SvPV>, but converts sv to utf8 first if necessary.
1603 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1604 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
1606 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1607 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1609 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1610 Like C<SvPV>, but converts sv to byte representation first if necessary.
1612 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1613 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1615 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1616 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1617 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1620 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1621 Like C<SvPV>, but converts sv to utf8 first if necessary.
1622 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1625 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1626 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1627 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1630 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1631 Like C<SvPV>, but converts sv to byte representation first if necessary.
1632 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1635 =for apidoc Am|bool|SvIsCOW|SV* sv
1636 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1637 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1640 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1641 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1644 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1645 Like C<sv_catpvn> but doesn't process magic.
1647 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1648 Like C<sv_setsv> but doesn't process magic.
1650 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1651 Like C<sv_catsv> but doesn't process magic.
1656 /* Let us hope that bitmaps for UV and IV are the same */
1657 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1658 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1659 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1661 #define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1662 #define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1666 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1667 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1668 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1670 #define SvPV_flags(sv, lp, flags) \
1671 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1672 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1673 #define SvPV_flags_const(sv, lp, flags) \
1674 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1675 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1676 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1677 #define SvPV_flags_const_nolen(sv, flags) \
1678 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1679 ? SvPVX_const(sv) : \
1680 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN))
1681 #define SvPV_flags_mutable(sv, lp, flags) \
1682 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1683 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1684 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1686 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1687 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1688 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1690 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1691 #define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
1693 #define SvPV_force_flags(sv, lp, flags) \
1694 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1695 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1696 #define SvPV_force_flags_nolen(sv, flags) \
1697 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1698 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1699 #define SvPV_force_flags_mutable(sv, lp, flags) \
1700 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1701 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1702 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1704 #define SvPV_nolen(sv) \
1705 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1706 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1708 #define SvPV_nolen_const(sv) \
1709 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1710 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1712 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1713 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1714 #define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
1718 #define SvPVutf8(sv, lp) \
1719 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1720 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1722 #define SvPVutf8_force(sv, lp) \
1723 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1724 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1727 #define SvPVutf8_nolen(sv) \
1728 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1729 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1733 #define SvPVbyte(sv, lp) \
1734 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1735 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1737 #define SvPVbyte_force(sv, lp) \
1738 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1739 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1741 #define SvPVbyte_nolen(sv) \
1742 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1743 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1747 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1748 * var to evaluate the arg once; failing that, use a global if possible;
1749 * failing that, call a function to do the work
1752 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1753 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1754 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1756 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1758 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1759 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1760 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1761 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1762 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1763 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1764 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1765 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1766 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1767 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1768 # define SvTRUE(sv) ( \
1772 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1774 (nxpv->xpv_cur > 1 || \
1775 (nxpv->xpv_cur && *(sv)->sv_u.svu_pv != '0')); }) \
1782 ? SvNVX(sv) != 0.0 \
1784 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1786 #else /* __GNUC__ */
1788 /* These inlined macros use globals, which will require a thread
1789 * declaration in user code, so we avoid them under threads */
1791 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1792 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1793 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1794 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1795 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1796 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1797 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1798 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1799 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1800 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1801 # define SvTRUE(sv) ( \
1805 ? ((PL_Xpv = (XPV*)SvANY(PL_Sv = (sv))) && \
1806 (PL_Xpv->xpv_cur > 1 || \
1807 (PL_Xpv->xpv_cur && *PL_Sv->sv_u.svu_pv != '0')) \
1814 ? SvNVX(sv) != 0.0 \
1816 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1817 #endif /* __GNU__ */
1819 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1820 (SVf_FAKE | SVf_READONLY))
1821 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1823 #define SvSHARED_HEK_FROM_PV(pvx) \
1824 ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
1825 #define SvSHARED_HASH(sv) (0 + SvSHARED_HEK_FROM_PV(SvPVX_const(sv))->hek_hash)
1827 /* flag values for sv_*_flags functions */
1828 #define SV_IMMEDIATE_UNREF 1
1830 #define SV_COW_DROP_PV 4
1831 #define SV_UTF8_NO_ENCODING 8
1832 #define SV_NOSTEAL 16
1833 #define SV_CONST_RETURN 32
1834 #define SV_MUTABLE_RETURN 64
1835 #define SV_SMAGIC 128
1836 #define SV_HAS_TRAILING_NUL 256
1837 #define SV_COW_SHARED_HASH_KEYS 512
1839 /* The core is safe for this COW optimisation. XS code on CPAN may not be.
1840 So only default to doing the COW setup if we're in the core.
1843 # ifndef SV_DO_COW_SVSETSV
1844 # define SV_DO_COW_SVSETSV SV_COW_SHARED_HASH_KEYS
1848 #ifndef SV_DO_COW_SVSETSV
1849 # define SV_DO_COW_SVSETSV 0
1853 #define sv_unref(sv) sv_unref_flags(sv, 0)
1854 #define sv_force_normal(sv) sv_force_normal_flags(sv, 0)
1855 #define sv_usepvn(sv, p, l) sv_usepvn_flags(sv, p, l, 0)
1856 #define sv_usepvn_mg(sv, p, l) sv_usepvn_flags(sv, p, l, SV_SMAGIC)
1858 /* We are about to replace the SV's current value. So if it's copy on write
1859 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1860 the value is about to get thrown away, so drop the PV rather than go to
1861 the effort of making a read-write copy only for it to get immediately
1864 #define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1865 sv_force_normal_flags(sv, SV_COW_DROP_PV)
1867 #ifdef PERL_OLD_COPY_ON_WRITE
1868 #define SvRELEASE_IVX(sv) \
1869 ((SvIsCOW(sv) ? sv_force_normal_flags(sv, 0) : (void) 0), SvOOK_off(sv))
1870 # define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
1872 # define SvRELEASE_IVX(sv) SvOOK_off(sv)
1873 #endif /* PERL_OLD_COPY_ON_WRITE */
1875 #define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1876 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1877 SVf_OOK|SVf_BREAK|SVf_READONLY)
1878 #define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1880 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1881 sv_force_normal_flags(sv, 0)
1884 /* all these 'functions' are now just macros */
1886 #define sv_pv(sv) SvPV_nolen(sv)
1887 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1888 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1890 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1891 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1892 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1893 #define sv_setsv(dsv, ssv) \
1894 sv_setsv_flags(dsv, ssv, SV_GMAGIC|SV_DO_COW_SVSETSV)
1895 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_DO_COW_SVSETSV)
1896 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1897 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1898 #define sv_catsv_mg(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC|SV_SMAGIC)
1899 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1900 #define sv_catpvn_mg(sv, sstr, slen) \
1901 sv_catpvn_flags(sv, sstr, slen, SV_GMAGIC|SV_SMAGIC);
1902 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1903 #define sv_2pv_nolen(sv) sv_2pv(sv, 0)
1904 #define sv_2pvbyte_nolen(sv) sv_2pvbyte(sv, 0)
1905 #define sv_2pvutf8_nolen(sv) sv_2pvutf8(sv, 0)
1906 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1907 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1908 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1909 #define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1910 #define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
1912 /* Should be named SvCatPVN_utf8_upgrade? */
1913 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1916 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1918 sv_setpvn(nsv, sstr, slen); \
1920 sv_utf8_upgrade(nsv); \
1921 sv_catsv(dsv, nsv); \
1925 =for apidoc Am|SV*|newRV_inc|SV* sv
1927 Creates an RV wrapper for an SV. The reference count for the original SV is
1933 #define newRV_inc(sv) newRV(sv)
1935 /* the following macros update any magic values this sv is associated with */
1938 =head1 Magical Functions
1940 =for apidoc Am|void|SvGETMAGIC|SV* sv
1941 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1942 argument more than once.
1944 =for apidoc Am|void|SvSETMAGIC|SV* sv
1945 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1946 argument more than once.
1948 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1949 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1952 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1953 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1954 ssv. May evaluate arguments more than once.
1956 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1957 Like C<SvSetSV>, but does any set magic required afterwards.
1959 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1960 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1962 =for apidoc Am|void|SvSHARE|SV* sv
1963 Arranges for sv to be shared between threads if a suitable module
1966 =for apidoc Am|void|SvLOCK|SV* sv
1967 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1970 =for apidoc Am|void|SvUNLOCK|SV* sv
1971 Releases a mutual exclusion lock on sv if a suitable module
1974 =head1 SV Manipulation Functions
1976 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1977 Expands the character buffer in the SV so that it has room for the
1978 indicated number of bytes (remember to reserve space for an extra trailing
1979 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1980 Returns a pointer to the character buffer.
1985 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1986 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1987 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1989 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1990 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1992 #define SvSetSV_and(dst,src,finally) \
1994 if ((dst) != (src)) { \
1995 sv_setsv(dst, src); \
1999 #define SvSetSV_nosteal_and(dst,src,finally) \
2001 if ((dst) != (src)) { \
2002 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL | SV_DO_COW_SVSETSV); \
2007 #define SvSetSV(dst,src) \
2008 SvSetSV_and(dst,src,/*nothing*/;)
2009 #define SvSetSV_nosteal(dst,src) \
2010 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
2012 #define SvSetMagicSV(dst,src) \
2013 SvSetSV_and(dst,src,SvSETMAGIC(dst))
2014 #define SvSetMagicSV_nosteal(dst,src) \
2015 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
2018 #if !defined(SKIP_DEBUGGING)
2019 #define SvPEEK(sv) sv_peek(sv)
2021 #define SvPEEK(sv) ""
2024 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
2026 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
2028 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
2029 /* If I give every macro argument a different name, then there won't be bugs
2030 where nested macros get confused. Been there, done that. */
2031 #define isGV_with_GP(pwadak) \
2032 (((SvFLAGS(pwadak) & (SVp_POK|SVpgv_GP)) == SVpgv_GP) \
2033 && (SvTYPE(pwadak) == SVt_PVGV || SvTYPE(pwadak) == SVt_PVLV))
2034 #define isGV_with_GP_on(sv) STMT_START { \
2035 assert (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVLV); \
2036 assert (!SvPOKp(sv)); \
2037 assert (!SvIOKp(sv)); \
2038 (SvFLAGS(sv) |= SVpgv_GP); \
2040 #define isGV_with_GP_off(sv) STMT_START { \
2041 assert (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVLV); \
2042 assert (!SvPOKp(sv)); \
2043 assert (!SvIOKp(sv)); \
2044 (SvFLAGS(sv) &= ~SVpgv_GP); \
2048 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
2049 #define SvGROW_mutable(sv,len) \
2050 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
2051 #define Sv_Grow sv_grow
2053 #define CLONEf_COPY_STACKS 1
2054 #define CLONEf_KEEP_PTR_TABLE 2
2055 #define CLONEf_CLONE_HOST 4
2056 #define CLONEf_JOIN_IN 8
2058 struct clone_params {
2061 PerlInterpreter *proto_perl;
2066 * c-indentation-style: bsd
2068 * indent-tabs-mode: t
2071 * ex: set ts=8 sts=4 sw=4 noet: