3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 #undef sv_flags /* Convex has this in <signal.h> for sigvec() */
18 =for apidoc AmU||svtype
19 An enum of flags for Perl types. These are found in the file B<sv.h>
20 in the C<svtype> enum. Test these flags with the C<SvTYPE> macro.
22 =for apidoc AmU||SVt_PV
23 Pointer type flag for scalars. See C<svtype>.
25 =for apidoc AmU||SVt_IV
26 Integer type flag for scalars. See C<svtype>.
28 =for apidoc AmU||SVt_NV
29 Double type flag for scalars. See C<svtype>.
31 =for apidoc AmU||SVt_PVMG
32 Type flag for blessed scalars. See C<svtype>.
34 =for apidoc AmU||SVt_PVAV
35 Type flag for arrays. See C<svtype>.
37 =for apidoc AmU||SVt_PVHV
38 Type flag for hashes. See C<svtype>.
40 =for apidoc AmU||SVt_PVCV
41 Type flag for code refs. See C<svtype>.
63 SVt_LAST /* keep last in enum. used to size arrays */
66 /* There is collusion here with sv_clear - sv_clear exits early for SVt_NULL
67 and SVt_IV, so never reaches the clause at the end that uses
68 sv_type_details->body_size to determine whether to call safefree(). Hence
69 body_size can be set no-zero to record the size of PTEs and HEs, without
70 fear of bogus frees. */
72 #define PTE_SVSLOT SVt_IV
74 #if defined(PERL_IN_HV_C) || defined(PERL_IN_XS_APITEST)
75 #define HE_SVSLOT SVt_NULL
78 #define PERL_ARENA_ROOTS_SIZE (SVt_LAST)
80 /* typedefs to eliminate some typing */
82 typedef struct hek HEK;
84 /* Using C's structural equivalence to help emulate C++ inheritance here... */
86 /* start with 2 sv-head building blocks */
87 #define _SV_HEAD(ptrtype) \
88 ptrtype sv_any; /* pointer to body */ \
89 U32 sv_refcnt; /* how many references to us */ \
90 U32 sv_flags /* what we are */
92 #define _SV_HEAD_UNION \
96 SV* svu_rv; /* pointer to another SV */ \
97 char* svu_pv; /* pointer to malloced string */ \
104 struct STRUCT_SV { /* struct sv { */
107 #ifdef DEBUG_LEAKING_SCALARS
108 unsigned sv_debug_optype:9; /* the type of OP that allocated us */
109 unsigned sv_debug_inpad:1; /* was allocated in a pad for an OP */
110 unsigned sv_debug_cloned:1; /* was cloned for an ithread */
111 unsigned sv_debug_line:16; /* the line where we were allocated */
112 char * sv_debug_file; /* the file where we were allocated */
117 _SV_HEAD(XPVGV*); /* pointer to xpvgv body */
122 _SV_HEAD(XPVCV*); /* pointer to xpvcv body */
127 _SV_HEAD(XPVAV*); /* pointer to xpvav body */
132 _SV_HEAD(XPVHV*); /* pointer to xpvhv body */
137 _SV_HEAD(XPVIO*); /* pointer to xpvio body */
142 #undef _SV_HEAD_UNION /* ensure no pollution */
145 =head1 SV Manipulation Functions
147 =for apidoc Am|U32|SvREFCNT|SV* sv
148 Returns the value of the object's reference count.
150 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
151 Increments the reference count of the given SV.
153 =for apidoc Am|void|SvREFCNT_dec|SV* sv
154 Decrements the reference count of the given SV.
156 =for apidoc Am|svtype|SvTYPE|SV* sv
157 Returns the type of the SV. See C<svtype>.
159 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
160 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
161 perform the upgrade if necessary. See C<svtype>.
166 #define SvANY(sv) (sv)->sv_any
167 #define SvFLAGS(sv) (sv)->sv_flags
168 #define SvREFCNT(sv) (sv)->sv_refcnt
170 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
171 # define SvREFCNT_inc(sv) \
173 SV * const _sv = (SV*)(sv); \
179 # define SvREFCNT_inc(sv) \
180 ((PL_Sv=(SV*)(sv)) ? ((++(SvREFCNT(PL_Sv))),(PL_Sv)) : NULL)
183 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
184 # define SvREFCNT_dec(sv) \
186 SV * const _sv = (SV*)(sv); \
188 if (SvREFCNT(_sv)) { \
189 if (--(SvREFCNT(_sv)) == 0) \
190 Perl_sv_free2(aTHX_ _sv); \
197 #define SvREFCNT_dec(sv) sv_free((SV*)(sv))
200 #define SVTYPEMASK 0xff
201 #define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK)
203 /* Sadly there are some parts of the core that have pointers to already-freed
204 SV heads, and rely on being able to tell that they are now free. So mark
205 them all by using a consistent macro. */
206 #define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
208 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= (mt) || (sv_upgrade(sv, mt), 1))
210 #define SVf_IOK 0x00000100 /* has valid public integer value */
211 #define SVf_NOK 0x00000200 /* has valid public numeric value */
212 #define SVf_POK 0x00000400 /* has valid public pointer value */
213 #define SVf_ROK 0x00000800 /* has a valid reference pointer */
215 #define SVp_IOK 0x00001000 /* has valid non-public integer value */
216 #define SVp_NOK 0x00002000 /* has valid non-public numeric value */
217 #define SVp_POK 0x00004000 /* has valid non-public pointer value */
218 #define SVp_SCREAM 0x00008000 /* has been studied? */
219 #define SVphv_CLONEABLE 0x00008000 /* PVHV (stashes) clone its objects */
221 #define SVs_PADSTALE 0x00010000 /* lexical has gone out of scope */
222 #define SVs_PADTMP 0x00020000 /* in use as tmp */
223 #define SVpad_TYPED 0x00020000 /* pad name is a Typed Lexical */
224 #define SVs_PADMY 0x00040000 /* in use a "my" variable */
225 #define SVpad_OUR 0x00040000 /* pad name is "our" instead of "my" */
226 #define SVs_TEMP 0x00080000 /* string is stealable? */
227 #define SVs_OBJECT 0x00100000 /* is "blessed" */
228 #define SVs_GMG 0x00200000 /* has magical get method */
229 #define SVs_SMG 0x00400000 /* has magical set method */
230 #define SVs_RMG 0x00800000 /* has random magical methods */
232 #define SVf_FAKE 0x01000000 /* 0: glob or lexical is just a copy
233 1: SV head arena wasn't malloc()ed
234 2: in conjunction with SVf_READONLY
235 marks a shared hash key scalar
236 (SvLEN == 0) or a copy on write
237 string (SvLEN != 0) [SvIsCOW(sv)]
238 3: For PVCV, whether CvUNIQUE(cv)
239 refers to an eval or once only
240 [CvEVAL(cv), CvSPECIAL(cv)]
241 4: Whether the regexp pointer is in
242 fact an offset [SvREPADTMP(sv)]
243 5: On a pad name SV, that slot in the
244 frame AV is a REFCNT'ed reference
245 to a lexical from "outside".
247 #define SVf_OOK 0x02000000 /* has valid offset value
248 For a PVHV this means that a
249 hv_aux struct is present after the
251 #define SVf_BREAK 0x04000000 /* refcnt is artificially low - used
252 * by SV's in final arena cleanup */
253 #define SVf_READONLY 0x08000000 /* may not be modified */
258 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
260 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
261 SVp_IOK|SVp_NOK|SVp_POK|SVp_SCREAM)
263 #define PRIVSHIFT 4 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
265 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
266 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded */
267 /* Ensure this value does not clash with the GV_ADD* flags in gv.h */
269 /* Some private flags. */
272 #define SVphv_REHASH 0x10000000 /* PVHV is recalculating hash values */
274 #define SVphv_SHAREKEYS 0x20000000 /* PVHV
275 keys live on shared string table */
276 /* PVNV, PVMG, PVGV, presumably only inside pads */
277 #define SVpad_NAME 0x40000000 /* This SV is a name in the PAD, so
278 SVpad_TYPED and SVpad_OUR apply */
280 #define SVpav_REAL 0x40000000 /* free old entries */
282 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
284 #define SVpbm_TAIL 0x40000000
286 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
288 /* IV, PVIV, PVNV, PVMG, PVGV and (I assume) PVLV */
289 /* Presumably IVs aren't stored in pads */
290 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
292 #define SVpav_REIFY 0x80000000 /* can become real */
294 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
296 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
298 #define SVpbm_VALID 0x80000000
299 /* RV upwards. However, SVf_ROK and SVp_IOK are exclusive */
300 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
305 NV xnv_nv; /* numeric value, if any */
308 STRLEN xpv_cur; /* length of svu_pv as a C string */
309 STRLEN xpv_len; /* allocated size */
313 typedef struct xpv xpv_allocated;
316 STRLEN xpv_cur; /* length of svu_pv as a C string */
317 STRLEN xpv_len; /* allocated size */
323 NV xnv_nv; /* numeric value, if any */
326 STRLEN xpv_cur; /* length of svu_pv as a C string */
327 STRLEN xpv_len; /* allocated size */
329 IV xivu_iv; /* integer value or pv offset */
337 typedef struct xpviv xpviv_allocated;
340 STRLEN xpv_cur; /* length of svu_pv as a C string */
341 STRLEN xpv_len; /* allocated size */
343 IV xivu_iv; /* integer value or pv offset */
351 #define xiv_iv xiv_u.xivu_iv
355 NV xnv_nv; /* numeric value, if any */
358 STRLEN xpv_cur; /* length of svu_pv as a C string */
359 STRLEN xpv_len; /* allocated size */
362 UV xuvu_uv; /* unsigned value or pv offset */
367 #define xuv_uv xuv_u.xuvu_uv
371 NV xnv_nv; /* numeric value, if any */
374 STRLEN xpv_cur; /* length of svu_pv as a C string */
375 STRLEN xpv_len; /* allocated size */
377 IV xivu_iv; /* integer value or pv offset */
384 /* These structure must match the beginning of struct xpvhv in hv.h. */
387 NV xnv_nv; /* numeric value, if any */
390 STRLEN xpv_cur; /* length of svu_pv as a C string */
391 STRLEN xpv_len; /* allocated size */
393 IV xivu_iv; /* integer value or pv offset */
399 MAGIC* xmg_magic; /* linked list of magicalness */
400 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
402 HV* xmg_stash; /* class package */
407 NV xnv_nv; /* numeric value, if any */
410 STRLEN xpv_cur; /* length of svu_pv as a C string */
411 STRLEN xpv_len; /* allocated size */
413 IV xivu_iv; /* integer value or pv offset */
419 MAGIC* xmg_magic; /* linked list of magicalness */
420 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
422 HV* xmg_stash; /* class package */
424 /* a full glob fits into this */
431 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
432 * y=alem/helem/iter t=tie T=tied HE */
438 HV * xgv_stash; /* The stash of this GV */
440 STRLEN xpv_cur; /* xgv_flags */
441 STRLEN xpv_len; /* 0 */
443 IV xivu_iv; /* integer value or pv offset */
449 MAGIC* xmg_magic; /* linked list of magicalness */
450 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
452 HV* xmg_stash; /* class package */
460 NV xnv_nv; /* numeric value, if any */
463 STRLEN xpv_cur; /* length of svu_pv as a C string */
464 STRLEN xpv_len; /* allocated size */
466 IV xivu_iv; /* integer value or pv offset */
472 MAGIC* xmg_magic; /* linked list of magicalness */
473 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
475 HV* xmg_stash; /* class package */
477 I32 xbm_useful; /* is this constant pattern being useful? */
478 U16 xbm_previous; /* how many characters in string before rare? */
479 U8 xbm_rare; /* rarest character in string */
482 /* This structure must match XPVCV in cv.h */
484 typedef U16 cv_flags_t;
488 NV xnv_nv; /* numeric value, if any */
491 STRLEN xpv_cur; /* length of svu_pv as a C string */
492 STRLEN xpv_len; /* allocated size */
494 IV xivu_iv; /* PVFMs use the pv offset */
500 MAGIC* xmg_magic; /* linked list of magicalness */
501 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
503 HV* xmg_stash; /* class package */
512 void (*xcv_xsub) (pTHX_ CV*);
518 U32 xcv_outside_seq; /* the COP sequence (at the point of our
519 * compilation) in the lexically enclosing
521 cv_flags_t xcv_flags;
526 STRLEN xpv_cur; /* length of svu_pv as a C string */
527 STRLEN xpv_len; /* allocated size */
529 IV xivu_iv; /* PVFMs use the pv offset */
535 MAGIC* xmg_magic; /* linked list of magicalness */
536 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
538 HV* xmg_stash; /* class package */
547 void (*xcv_xsub) (pTHX_ CV*);
553 U32 xcv_outside_seq; /* the COP sequence (at the point of our
554 * compilation) in the lexically enclosing
556 cv_flags_t xcv_flags;
562 NV xnv_nv; /* numeric value, if any */
565 STRLEN xpv_cur; /* length of svu_pv as a C string */
566 STRLEN xpv_len; /* allocated size */
568 IV xivu_iv; /* integer value or pv offset */
574 MAGIC* xmg_magic; /* linked list of magicalness */
575 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
577 HV* xmg_stash; /* class package */
579 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
580 PerlIO * xio_ofp; /* but sockets need separate streams */
581 /* Cray addresses everything by word boundaries (64 bits) and
582 * code and data pointers cannot be mixed (which is exactly what
583 * Perl_filter_add() tries to do with the dirp), hence the following
584 * union trick (as suggested by Gurusamy Sarathy).
585 * For further information see Geir Johansen's problem report titled
586 [ID 20000612.002] Perl problem on Cray system
587 * The any pointer (known as IoANY()) will also be a good place
588 * to hang any IO disciplines to.
591 DIR * xiou_dirp; /* for opendir, readdir, etc */
592 void * xiou_any; /* for alignment */
594 IV xio_lines; /* $. */
595 IV xio_page; /* $% */
596 IV xio_page_len; /* $= */
597 IV xio_lines_left; /* $- */
598 char * xio_top_name; /* $^ */
599 GV * xio_top_gv; /* $^ */
600 char * xio_fmt_name; /* $~ */
601 GV * xio_fmt_gv; /* $~ */
602 char * xio_bottom_name;/* $^B */
603 GV * xio_bottom_gv; /* $^B */
604 short xio_subprocess; /* -| or |- */
608 #define xio_dirp xio_dirpu.xiou_dirp
609 #define xio_any xio_dirpu.xiou_any
611 #define IOf_ARGV 1 /* this fp iterates over ARGV */
612 #define IOf_START 2 /* check for null ARGV and substitute '-' */
613 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
614 #define IOf_DIDTOP 8 /* just did top of form */
615 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
616 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
617 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
619 /* The following macros define implementation-independent predicates on SVs. */
622 =for apidoc Am|bool|SvNIOK|SV* sv
623 Returns a boolean indicating whether the SV contains a number, integer or
626 =for apidoc Am|bool|SvNIOKp|SV* sv
627 Returns a boolean indicating whether the SV contains a number, integer or
628 double. Checks the B<private> setting. Use C<SvNIOK>.
630 =for apidoc Am|void|SvNIOK_off|SV* sv
631 Unsets the NV/IV status of an SV.
633 =for apidoc Am|bool|SvOK|SV* sv
634 Returns a boolean indicating whether the value is an SV. It also tells
635 whether the value is defined or not.
637 =for apidoc Am|bool|SvIOKp|SV* sv
638 Returns a boolean indicating whether the SV contains an integer. Checks
639 the B<private> setting. Use C<SvIOK>.
641 =for apidoc Am|bool|SvNOKp|SV* sv
642 Returns a boolean indicating whether the SV contains a double. Checks the
643 B<private> setting. Use C<SvNOK>.
645 =for apidoc Am|bool|SvPOKp|SV* sv
646 Returns a boolean indicating whether the SV contains a character string.
647 Checks the B<private> setting. Use C<SvPOK>.
649 =for apidoc Am|bool|SvIOK|SV* sv
650 Returns a boolean indicating whether the SV contains an integer.
652 =for apidoc Am|void|SvIOK_on|SV* sv
653 Tells an SV that it is an integer.
655 =for apidoc Am|void|SvIOK_off|SV* sv
656 Unsets the IV status of an SV.
658 =for apidoc Am|void|SvIOK_only|SV* sv
659 Tells an SV that it is an integer and disables all other OK bits.
661 =for apidoc Am|void|SvIOK_only_UV|SV* sv
662 Tells and SV that it is an unsigned integer and disables all other OK bits.
664 =for apidoc Am|bool|SvIOK_UV|SV* sv
665 Returns a boolean indicating whether the SV contains an unsigned integer.
667 =for apidoc Am|void|SvUOK|SV* sv
668 Returns a boolean indicating whether the SV contains an unsigned integer.
670 =for apidoc Am|bool|SvIOK_notUV|SV* sv
671 Returns a boolean indicating whether the SV contains a signed integer.
673 =for apidoc Am|bool|SvNOK|SV* sv
674 Returns a boolean indicating whether the SV contains a double.
676 =for apidoc Am|void|SvNOK_on|SV* sv
677 Tells an SV that it is a double.
679 =for apidoc Am|void|SvNOK_off|SV* sv
680 Unsets the NV status of an SV.
682 =for apidoc Am|void|SvNOK_only|SV* sv
683 Tells an SV that it is a double and disables all other OK bits.
685 =for apidoc Am|bool|SvPOK|SV* sv
686 Returns a boolean indicating whether the SV contains a character
689 =for apidoc Am|void|SvPOK_on|SV* sv
690 Tells an SV that it is a string.
692 =for apidoc Am|void|SvPOK_off|SV* sv
693 Unsets the PV status of an SV.
695 =for apidoc Am|void|SvPOK_only|SV* sv
696 Tells an SV that it is a string and disables all other OK bits.
697 Will also turn off the UTF-8 status.
699 =for apidoc Am|bool|SvVOK|SV* sv
700 Returns a boolean indicating whether the SV contains a v-string.
702 =for apidoc Am|bool|SvOOK|SV* sv
703 Returns a boolean indicating whether the SvIVX is a valid offset value for
704 the SvPVX. This hack is used internally to speed up removal of characters
705 from the beginning of a SvPV. When SvOOK is true, then the start of the
706 allocated string buffer is really (SvPVX - SvIVX).
708 =for apidoc Am|bool|SvROK|SV* sv
709 Tests if the SV is an RV.
711 =for apidoc Am|void|SvROK_on|SV* sv
712 Tells an SV that it is an RV.
714 =for apidoc Am|void|SvROK_off|SV* sv
715 Unsets the RV status of an SV.
717 =for apidoc Am|SV*|SvRV|SV* sv
718 Dereferences an RV to return the SV.
720 =for apidoc Am|IV|SvIVX|SV* sv
721 Returns the raw value in the SV's IV slot, without checks or conversions.
722 Only use when you are sure SvIOK is true. See also C<SvIV()>.
724 =for apidoc Am|UV|SvUVX|SV* sv
725 Returns the raw value in the SV's UV slot, without checks or conversions.
726 Only use when you are sure SvIOK is true. See also C<SvUV()>.
728 =for apidoc Am|NV|SvNVX|SV* sv
729 Returns the raw value in the SV's NV slot, without checks or conversions.
730 Only use when you are sure SvNOK is true. See also C<SvNV()>.
732 =for apidoc Am|char*|SvPVX|SV* sv
733 Returns a pointer to the physical string in the SV. The SV must contain a
736 =for apidoc Am|STRLEN|SvCUR|SV* sv
737 Returns the length of the string which is in the SV. See C<SvLEN>.
739 =for apidoc Am|STRLEN|SvLEN|SV* sv
740 Returns the size of the string buffer in the SV, not including any part
741 attributable to C<SvOOK>. See C<SvCUR>.
743 =for apidoc Am|char*|SvEND|SV* sv
744 Returns a pointer to the last character in the string which is in the SV.
745 See C<SvCUR>. Access the character as *(SvEND(sv)).
747 =for apidoc Am|HV*|SvSTASH|SV* sv
748 Returns the stash of the SV.
750 =for apidoc Am|void|SvIV_set|SV* sv|IV val
751 Set the value of the IV pointer in sv to val. It is possible to perform
752 the same function of this macro with an lvalue assignment to C<SvIVX>.
753 With future Perls, however, it will be more efficient to use
754 C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
756 =for apidoc Am|void|SvNV_set|SV* sv|NV val
757 Set the value of the NV pointer in sv to val. See C<SvIV_set>.
759 =for apidoc Am|void|SvPV_set|SV* sv|char* val
760 Set the value of the PV pointer in sv to val. See C<SvIV_set>.
762 =for apidoc Am|void|SvUV_set|SV* sv|UV val
763 Set the value of the UV pointer in sv to val. See C<SvIV_set>.
765 =for apidoc Am|void|SvRV_set|SV* sv|SV* val
766 Set the value of the RV pointer in sv to val. See C<SvIV_set>.
768 =for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
769 Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>.
771 =for apidoc Am|void|SvSTASH_set|SV* sv|STASH* val
772 Set the value of the STASH pointer in sv to val. See C<SvIV_set>.
774 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
775 Set the current length of the string which is in the SV. See C<SvCUR>
778 =for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
779 Set the actual length of the string which is in the SV. See C<SvIV_set>.
784 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
785 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
786 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
787 SVp_IOK|SVp_NOK|SVf_IVisUV))
789 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
790 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
791 #define assert_not_glob(sv) ({assert(!isGV_with_GP(sv));}),
793 #define assert_not_ROK(sv)
794 #define assert_not_glob(sv)
797 #define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
798 #define SvOK_off(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
799 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
800 SVf_IVisUV|SVf_UTF8), \
802 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
803 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
807 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
808 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
809 #define SvIOKp_on(sv) (assert_not_glob(sv) SvRELEASE_IVX(sv), \
810 SvFLAGS(sv) |= SVp_IOK)
811 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
812 #define SvNOKp_on(sv) (assert_not_glob(sv) SvFLAGS(sv) |= SVp_NOK)
813 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
814 #define SvPOKp_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
815 SvFLAGS(sv) |= SVp_POK)
817 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
818 #define SvIOK_on(sv) (assert_not_glob(sv) SvRELEASE_IVX(sv), \
819 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
820 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
821 #define SvIOK_only(sv) (SvOK_off(sv), \
822 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
823 #define SvIOK_only_UV(sv) (assert_not_glob(sv) SvOK_off_exc_UV(sv), \
824 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
826 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
827 == (SVf_IOK|SVf_IVisUV))
828 #define SvUOK(sv) SvIOK_UV(sv)
829 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
832 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
833 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
834 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
836 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
837 #define SvNOK_on(sv) (assert_not_glob(sv) \
838 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
839 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
840 #define SvNOK_only(sv) (SvOK_off(sv), \
841 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
844 =for apidoc Am|bool|SvUTF8|SV* sv
845 Returns a boolean indicating whether the SV contains UTF-8 encoded data.
847 =for apidoc Am|void|SvUTF8_on|SV *sv
848 Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
849 Do not use frivolously.
851 =for apidoc Am|void|SvUTF8_off|SV *sv
852 Unsets the UTF-8 status of an SV.
854 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
855 Tells an SV that it is a string and disables all other OK bits,
856 and leaves the UTF-8 status as it was.
861 /* Ensure the return value of this macro does not clash with the GV_ADD* flags
863 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
864 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
865 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
867 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
868 #define SvPOK_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
869 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
870 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
871 #define SvPOK_only(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
872 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
873 SVf_IVisUV|SVf_UTF8), \
874 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
875 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
876 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
878 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
880 #define SvVOK(sv) (SvMAGICAL(sv) \
881 ? mg_find(sv,PERL_MAGIC_vstring) : NULL)
882 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
883 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
884 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
886 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
887 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
888 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
890 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
891 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
892 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVf_AMAGIC))
894 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
895 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
896 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
898 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
899 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
900 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
902 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
903 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
904 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
906 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
907 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
908 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
910 #define SvAMAGIC(sv) (SvFLAGS(sv) & SVf_AMAGIC)
911 #define SvAMAGIC_on(sv) (SvFLAGS(sv) |= SVf_AMAGIC)
912 #define SvAMAGIC_off(sv) (SvFLAGS(sv) &= ~SVf_AMAGIC)
914 #define SvGAMAGIC(sv) (SvFLAGS(sv) & (SVs_GMG|SVf_AMAGIC))
917 #define Gv_AMG(stash) \
918 (HV_AMAGICmb(stash) && \
919 ((!HV_AMAGICbad(stash) && HV_AMAGIC(stash)) || Gv_AMupdate(stash)))
921 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
923 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
924 == (SVf_ROK|SVprv_WEAKREF))
925 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
926 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
928 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
930 #define SvPADSTALE(sv) (SvFLAGS(sv) & SVs_PADSTALE)
931 #define SvPADSTALE_on(sv) (SvFLAGS(sv) |= SVs_PADSTALE)
932 #define SvPADSTALE_off(sv) (SvFLAGS(sv) &= ~SVs_PADSTALE)
934 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
935 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
936 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
938 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
939 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY)
941 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
942 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
943 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
945 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
946 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
947 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
949 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
950 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
951 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
953 #define SvSCREAM(sv) ((SvFLAGS(sv) & (SVp_SCREAM|SVp_POK)) == (SVp_SCREAM|SVp_POK))
954 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
955 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
957 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
958 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
959 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
961 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
962 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
963 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
965 #define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL)
966 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
967 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
969 #define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
970 #define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
971 #define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
974 /* The following uses the FAKE flag to show that a regex pointer is infact
975 its own offset in the regexpad for ithreads */
976 #define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
977 #define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
978 #define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
981 #define SvPAD_TYPED(sv) \
982 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_TYPED)) == (SVpad_NAME|SVpad_TYPED))
983 #define SvPAD_TYPED_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_TYPED)
985 #define SvPAD_OUR(sv) \
986 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_OUR)) == (SVpad_NAME|SVpad_OUR))
987 #define SvPAD_OUR_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_OUR)
989 #define OURSTASH(sv) \
990 (SvPAD_OUR(sv) ? ((XPVMG*) SvANY(sv))->xmg_u.xmg_ourstash : NULL)
991 #define OURSTASH_set(sv, st) \
993 assert(SvTYPE(sv) == SVt_PVMG); \
994 ((XPVMG*) SvANY(sv))->xmg_u.xmg_ourstash = st; \
997 #ifdef PERL_DEBUG_COW
998 #define SvRV(sv) (0 + (sv)->sv_u.svu_rv)
1000 #define SvRV(sv) ((sv)->sv_u.svu_rv)
1002 #define SvRVx(sv) SvRV(sv)
1004 #ifdef PERL_DEBUG_COW
1005 /* Need -0.0 for SvNVX to preserve IEEE FP "negative zero" because
1006 +0.0 + -0.0 => +0.0 but -0.0 + -0.0 => -0.0 */
1007 # define SvIVX(sv) (0 + ((XPVIV*) SvANY(sv))->xiv_iv)
1008 # define SvUVX(sv) (0 + ((XPVUV*) SvANY(sv))->xuv_uv)
1009 # define SvNVX(sv) (-0.0 + ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv)
1010 /* Don't test the core XS code yet. */
1011 # if defined (PERL_CORE) && PERL_DEBUG_COW > 1
1012 # define SvPVX(sv) (0 + (assert(!SvREADONLY(sv)), (sv)->sv_u.svu_pv))
1014 # define SvPVX(sv) SvPVX_mutable(sv)
1016 # define SvCUR(sv) (0 + ((XPV*) SvANY(sv))->xpv_cur)
1017 # define SvLEN(sv) (0 + ((XPV*) SvANY(sv))->xpv_len)
1018 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1021 # define SvMAGIC(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_u.xmg_magic))
1022 # define SvSTASH(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
1024 # define SvMAGIC(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic)
1025 # define SvSTASH(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_stash)
1028 # define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
1029 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1031 # if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1032 /* These get expanded inside other macros that already use a variable _sv */
1033 # define SvPVX(sv) \
1034 (*({ SV *const _svi = (SV *) sv; \
1035 assert(SvTYPE(_svi) >= SVt_PV); \
1036 assert(SvTYPE(_svi) != SVt_PVAV); \
1037 assert(SvTYPE(_svi) != SVt_PVHV); \
1038 assert(!isGV_with_GP(_svi)); \
1039 &((_svi)->sv_u.svu_pv); \
1041 # define SvCUR(sv) \
1042 (*({ SV *const _svi = (SV *) sv; \
1043 assert(SvTYPE(_svi) >= SVt_PV); \
1044 assert(SvTYPE(_svi) != SVt_PVAV); \
1045 assert(SvTYPE(_svi) != SVt_PVHV); \
1046 assert(!isGV_with_GP(_svi)); \
1047 &(((XPV*) SvANY(_svi))->xpv_cur); \
1049 # define SvIVX(sv) \
1050 (*({ SV *const _svi = (SV *) sv; \
1051 assert(SvTYPE(_svi) == SVt_IV || SvTYPE(_svi) >= SVt_PVIV); \
1052 assert(SvTYPE(_svi) != SVt_PVAV); \
1053 assert(SvTYPE(_svi) != SVt_PVHV); \
1054 assert(SvTYPE(_svi) != SVt_PVCV); \
1055 assert(!isGV_with_GP(_svi)); \
1056 &(((XPVIV*) SvANY(_svi))->xiv_iv); \
1058 # define SvUVX(sv) \
1059 (*({ SV *const _svi = (SV *) sv; \
1060 assert(SvTYPE(_svi) == SVt_IV || SvTYPE(_svi) >= SVt_PVIV); \
1061 assert(SvTYPE(_svi) != SVt_PVAV); \
1062 assert(SvTYPE(_svi) != SVt_PVHV); \
1063 assert(SvTYPE(_svi) != SVt_PVCV); \
1064 assert(!isGV_with_GP(_svi)); \
1065 &(((XPVUV*) SvANY(_svi))->xuv_uv); \
1067 # define SvNVX(sv) \
1068 (*({ SV *const _svi = (SV *) sv; \
1069 assert(SvTYPE(_svi) == SVt_NV || SvTYPE(_svi) >= SVt_PVNV); \
1070 assert(SvTYPE(_svi) != SVt_PVAV); \
1071 assert(SvTYPE(_svi) != SVt_PVHV); \
1072 assert(SvTYPE(_svi) != SVt_PVFM); \
1073 assert(!isGV_with_GP(_svi)); \
1074 &(((XPVNV*) SvANY(_svi))->xnv_u.xnv_nv); \
1076 # define SvMAGIC(sv) \
1077 (*({ SV *const _svi = (SV *) sv; \
1078 assert(SvTYPE(_svi) >= SVt_PVMG); \
1079 &(((XPVMG*) SvANY(_svi))->xmg_u.xmg_magic); \
1081 # define SvSTASH(sv) \
1082 (*({ SV *const _svi = (SV *) sv; \
1083 assert(SvTYPE(_svi) >= SVt_PVMG); \
1084 &(((XPVMG*) SvANY(_svi))->xmg_stash); \
1087 # define SvPVX(sv) ((sv)->sv_u.svu_pv)
1088 # define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
1089 # define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
1090 # define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
1091 # define SvNVX(sv) ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv
1092 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic
1093 # define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
1098 /* Given that these two are new, there can't be any existing code using them
1100 # define SvPVX_mutable(sv) (0 + (sv)->sv_u.svu_pv)
1101 # define SvPVX_const(sv) ((const char*)(0 + (sv)->sv_u.svu_pv))
1103 /* Except for the poison code, which uses & to scribble over the pointer after
1104 free() is called. */
1105 # define SvPVX_mutable(sv) ((sv)->sv_u.svu_pv)
1106 # define SvPVX_const(sv) ((const char*)((sv)->sv_u.svu_pv))
1109 #define SvIVXx(sv) SvIVX(sv)
1110 #define SvUVXx(sv) SvUVX(sv)
1111 #define SvNVXx(sv) SvNVX(sv)
1112 #define SvPVXx(sv) SvPVX(sv)
1113 #define SvLENx(sv) SvLEN(sv)
1114 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
1117 /* Ask a scalar nicely to try to become an IV, if possible.
1118 Not guaranteed to stay returning void */
1119 /* Macro won't actually call sv_2iv if already IOK */
1120 #define SvIV_please(sv) \
1121 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
1122 (void) SvIV(sv); } STMT_END
1123 #define SvIV_set(sv, val) \
1124 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1125 assert(!isGV_with_GP(sv)); \
1126 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
1127 #define SvNV_set(sv, val) \
1128 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
1129 assert(SvTYPE(sv) != SVt_PVAV); assert(SvTYPE(sv) != SVt_PVHV); \
1130 assert(!isGV_with_GP(sv)); \
1131 (((XPVNV*)SvANY(sv))->xnv_u.xnv_nv = (val)); } STMT_END
1132 #define SvPV_set(sv, val) \
1133 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1134 assert(!isGV_with_GP(sv)); \
1135 ((sv)->sv_u.svu_pv = (val)); } STMT_END
1136 #define SvUV_set(sv, val) \
1137 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1138 assert(!isGV_with_GP(sv)); \
1139 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
1140 #define SvRV_set(sv, val) \
1141 STMT_START { assert(SvTYPE(sv) >= SVt_RV); \
1142 assert(!isGV_with_GP(sv)); \
1143 ((sv)->sv_u.svu_rv = (val)); } STMT_END
1144 #define SvMAGIC_set(sv, val) \
1145 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1146 (((XPVMG*)SvANY(sv))->xmg_u.xmg_magic = (val)); } STMT_END
1147 #define SvSTASH_set(sv, val) \
1148 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1149 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
1150 #define SvCUR_set(sv, val) \
1151 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1152 assert(!isGV_with_GP(sv)); \
1153 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
1154 #define SvLEN_set(sv, val) \
1155 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1156 assert(!isGV_with_GP(sv)); \
1157 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
1158 #define SvEND_set(sv, val) \
1159 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1160 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
1162 #define SvPV_renew(sv,n) \
1163 STMT_START { SvLEN_set(sv, n); \
1164 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
1165 (char*)saferealloc((Malloc_t)SvPVX(sv), \
1166 (MEM_SIZE)((n))))); \
1169 #define SvPV_shrink_to_cur(sv) STMT_START { \
1170 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
1171 SvPV_renew(sv, _lEnGtH); \
1174 #define SvPV_free(sv) \
1176 assert(SvTYPE(sv) >= SVt_PV); \
1179 SvPV_set(sv, SvPVX_mutable(sv) - SvIVX(sv)); \
1180 SvFLAGS(sv) &= ~SVf_OOK; \
1182 Safefree(SvPVX(sv)); \
1186 #define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
1187 #define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
1188 #define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
1190 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
1192 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
1193 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
1194 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
1195 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
1197 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
1198 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
1199 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
1200 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
1201 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
1202 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
1203 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
1204 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
1205 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
1206 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
1207 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
1208 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
1209 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
1210 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
1211 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
1212 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1213 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1215 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
1216 #define IoTYPE_RDONLY '<'
1217 #define IoTYPE_WRONLY '>'
1218 #define IoTYPE_RDWR '+'
1219 #define IoTYPE_APPEND 'a'
1220 #define IoTYPE_PIPE '|'
1221 #define IoTYPE_STD '-' /* stdin or stdout */
1222 #define IoTYPE_SOCKET 's'
1223 #define IoTYPE_CLOSED ' '
1224 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1225 #define IoTYPE_NUMERIC '#' /* fdopen */
1228 =for apidoc Am|bool|SvTAINTED|SV* sv
1229 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
1232 =for apidoc Am|void|SvTAINTED_on|SV* sv
1233 Marks an SV as tainted if tainting is enabled.
1235 =for apidoc Am|void|SvTAINTED_off|SV* sv
1236 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1237 some of Perl's fundamental security features. XS module authors should not
1238 use this function unless they fully understand all the implications of
1239 unconditionally untainting the value. Untainting should be done in the
1240 standard perl fashion, via a carefully crafted regexp, rather than directly
1241 untainting variables.
1243 =for apidoc Am|void|SvTAINT|SV* sv
1244 Taints an SV if tainting is enabled.
1249 #define sv_taint(sv) sv_magic((sv), NULL, PERL_MAGIC_taint, NULL, 0)
1251 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1252 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
1253 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
1255 #define SvTAINT(sv) \
1257 if (PL_tainting) { \
1264 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
1265 Like C<SvPV> but will force the SV into containing just a string
1266 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1269 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
1270 Like C<SvPV> but will force the SV into containing just a string
1271 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1272 directly. Doesn't process magic.
1274 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
1275 Returns a pointer to the string in the SV, or a stringified form of
1276 the SV if the SV does not contain a string. The SV may cache the
1277 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
1278 C<SvPVx> for a version which guarantees to evaluate sv only once.
1280 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
1281 A version of C<SvPV> which guarantees to evaluate sv only once.
1283 =for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1284 Like C<SvPV> but doesn't process magic.
1286 =for apidoc Am|char*|SvPV_nolen|SV* sv
1287 Returns a pointer to the string in the SV, or a stringified form of
1288 the SV if the SV does not contain a string. The SV may cache the
1289 stringified form becoming C<SvPOK>. Handles 'get' magic.
1291 =for apidoc Am|IV|SvIV|SV* sv
1292 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
1293 version which guarantees to evaluate sv only once.
1295 =for apidoc Am|IV|SvIV_nomg|SV* sv
1296 Like C<SvIV> but doesn't process magic.
1298 =for apidoc Am|IV|SvIVx|SV* sv
1299 Coerces the given SV to an integer and returns it. Guarantees to evaluate
1300 sv only once. Use the more efficient C<SvIV> otherwise.
1302 =for apidoc Am|NV|SvNV|SV* sv
1303 Coerce the given SV to a double and return it. See C<SvNVx> for a version
1304 which guarantees to evaluate sv only once.
1306 =for apidoc Am|NV|SvNVx|SV* sv
1307 Coerces the given SV to a double and returns it. Guarantees to evaluate
1308 sv only once. Use the more efficient C<SvNV> otherwise.
1310 =for apidoc Am|UV|SvUV|SV* sv
1311 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
1312 for a version which guarantees to evaluate sv only once.
1314 =for apidoc Am|UV|SvUV_nomg|SV* sv
1315 Like C<SvUV> but doesn't process magic.
1317 =for apidoc Am|UV|SvUVx|SV* sv
1318 Coerces the given SV to an unsigned integer and returns it. Guarantees to
1319 evaluate sv only once. Use the more efficient C<SvUV> otherwise.
1321 =for apidoc Am|bool|SvTRUE|SV* sv
1322 Returns a boolean indicating whether Perl would evaluate the SV as true or
1323 false, defined or undefined. Does not handle 'get' magic.
1325 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
1326 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1328 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
1329 Like C<SvPV>, but converts sv to utf8 first if necessary.
1331 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1332 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
1334 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1335 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1337 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1338 Like C<SvPV>, but converts sv to byte representation first if necessary.
1340 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1341 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1343 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1344 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1345 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1348 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1349 Like C<SvPV>, but converts sv to utf8 first if necessary.
1350 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1353 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1354 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1355 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1358 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1359 Like C<SvPV>, but converts sv to byte representation first if necessary.
1360 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1363 =for apidoc Am|bool|SvIsCOW|SV* sv
1364 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1365 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1368 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1369 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1372 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1373 Like C<sv_catpvn> but doesn't process magic.
1375 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1376 Like C<sv_setsv> but doesn't process magic.
1378 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1379 Like C<sv_catsv> but doesn't process magic.
1384 /* Let us hope that bitmaps for UV and IV are the same */
1385 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1386 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1387 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1389 #define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1390 #define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1394 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1395 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1396 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1398 #define SvPV_flags(sv, lp, flags) \
1399 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1400 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1401 #define SvPV_flags_const(sv, lp, flags) \
1402 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1403 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1404 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1405 #define SvPV_flags_const_nolen(sv, flags) \
1406 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1407 ? SvPVX_const(sv) : \
1408 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN))
1409 #define SvPV_flags_mutable(sv, lp, flags) \
1410 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1411 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1412 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1414 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1415 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1416 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1418 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1419 #define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
1421 #define SvPV_force_flags(sv, lp, flags) \
1422 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1423 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1424 #define SvPV_force_flags_nolen(sv, flags) \
1425 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1426 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1427 #define SvPV_force_flags_mutable(sv, lp, flags) \
1428 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1429 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1430 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1432 #define SvPV_nolen(sv) \
1433 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1434 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1436 #define SvPV_nolen_const(sv) \
1437 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1438 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1440 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1441 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1442 #define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
1446 #define SvPVutf8(sv, lp) \
1447 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1448 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1450 #define SvPVutf8_force(sv, lp) \
1451 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1452 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1455 #define SvPVutf8_nolen(sv) \
1456 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1457 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1461 #define SvPVbyte(sv, lp) \
1462 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1463 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1465 #define SvPVbyte_force(sv, lp) \
1466 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1467 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1469 #define SvPVbyte_nolen(sv) \
1470 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1471 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1475 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1476 * var to evaluate the arg once; failing that, use a global if possible;
1477 * failing that, call a function to do the work
1480 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1481 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1482 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1484 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1486 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1487 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1488 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1489 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1490 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1491 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1492 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1493 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1494 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1495 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1496 # define SvTRUE(sv) ( \
1500 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1502 (nxpv->xpv_cur > 1 || \
1503 (nxpv->xpv_cur && *(sv)->sv_u.svu_pv != '0')); }) \
1510 ? SvNVX(sv) != 0.0 \
1512 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1514 #else /* __GNUC__ */
1516 /* These inlined macros use globals, which will require a thread
1517 * declaration in user code, so we avoid them under threads */
1519 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1520 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1521 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1522 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1523 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1524 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1525 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1526 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1527 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1528 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1529 # define SvTRUE(sv) ( \
1533 ? ((PL_Xpv = (XPV*)SvANY(PL_Sv = (sv))) && \
1534 (PL_Xpv->xpv_cur > 1 || \
1535 (PL_Xpv->xpv_cur && *PL_Sv->sv_u.svu_pv != '0')) \
1542 ? SvNVX(sv) != 0.0 \
1544 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1545 #endif /* __GNU__ */
1547 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1548 (SVf_FAKE | SVf_READONLY))
1549 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1551 #define SvSHARED_HEK_FROM_PV(pvx) \
1552 ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
1553 #define SvSHARED_HASH(sv) (0 + SvSHARED_HEK_FROM_PV(SvPVX_const(sv))->hek_hash)
1555 /* flag values for sv_*_flags functions */
1556 #define SV_IMMEDIATE_UNREF 1
1558 #define SV_COW_DROP_PV 4
1559 #define SV_UTF8_NO_ENCODING 8
1560 #define SV_NOSTEAL 16
1561 #define SV_CONST_RETURN 32
1562 #define SV_MUTABLE_RETURN 64
1563 #define SV_SMAGIC 128
1565 #define sv_unref(sv) sv_unref_flags(sv, 0)
1566 #define sv_force_normal(sv) sv_force_normal_flags(sv, 0)
1568 /* We are about to replace the SV's current value. So if it's copy on write
1569 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1570 the value is about to get thrown away, so drop the PV rather than go to
1571 the effort of making a read-write copy only for it to get immediately
1574 #define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1575 sv_force_normal_flags(sv, SV_COW_DROP_PV)
1577 #ifdef PERL_OLD_COPY_ON_WRITE
1578 # define SvRELEASE_IVX(sv) ((void)((SvFLAGS(sv) & (SVf_OOK|SVf_READONLY|SVf_FAKE)) \
1579 && Perl_sv_release_IVX(aTHX_ sv)))
1580 # define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
1582 # define SvRELEASE_IVX(sv) SvOOK_off(sv)
1583 #endif /* PERL_OLD_COPY_ON_WRITE */
1585 #define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1586 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1587 SVf_OOK|SVf_BREAK|SVf_READONLY|SVf_AMAGIC)
1588 #define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1590 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1591 sv_force_normal_flags(sv, 0)
1594 /* all these 'functions' are now just macros */
1596 #define sv_pv(sv) SvPV_nolen(sv)
1597 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1598 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1600 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1601 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1602 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1603 #define sv_setsv(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_GMAGIC)
1604 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, 0)
1605 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1606 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1607 #define sv_catsv_mg(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC|SV_SMAGIC)
1608 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1609 #define sv_catpvn_mg(sv, sstr, slen) \
1610 sv_catpvn_flags(sv, sstr, slen, SV_GMAGIC|SV_SMAGIC);
1611 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1612 #define sv_2pv_nolen(sv) sv_2pv(sv, 0)
1613 #define sv_2pvbyte_nolen(sv) sv_2pvbyte(sv, 0)
1614 #define sv_2pvutf8_nolen(sv) sv_2pvutf8(sv, 0)
1615 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1616 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1617 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1618 #define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1619 #define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
1621 /* Should be named SvCatPVN_utf8_upgrade? */
1622 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1625 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1627 sv_setpvn(nsv, sstr, slen); \
1629 sv_utf8_upgrade(nsv); \
1630 sv_catsv(dsv, nsv); \
1634 =for apidoc Am|SV*|newRV_inc|SV* sv
1636 Creates an RV wrapper for an SV. The reference count for the original SV is
1642 #define newRV_inc(sv) newRV(sv)
1644 /* the following macros update any magic values this sv is associated with */
1647 =head1 Magical Functions
1649 =for apidoc Am|void|SvGETMAGIC|SV* sv
1650 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1651 argument more than once.
1653 =for apidoc Am|void|SvSETMAGIC|SV* sv
1654 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1655 argument more than once.
1657 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1658 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1661 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1662 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1663 ssv. May evaluate arguments more than once.
1665 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1666 Like C<SvSetSV>, but does any set magic required afterwards.
1668 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1669 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1671 =for apidoc Am|void|SvSHARE|SV* sv
1672 Arranges for sv to be shared between threads if a suitable module
1675 =for apidoc Am|void|SvLOCK|SV* sv
1676 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1679 =for apidoc Am|void|SvUNLOCK|SV* sv
1680 Releases a mutual exclusion lock on sv if a suitable module
1683 =head1 SV Manipulation Functions
1685 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1686 Expands the character buffer in the SV so that it has room for the
1687 indicated number of bytes (remember to reserve space for an extra trailing
1688 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1689 Returns a pointer to the character buffer.
1694 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1695 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1696 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1698 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1699 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1701 #define SvSetSV_and(dst,src,finally) \
1703 if ((dst) != (src)) { \
1704 sv_setsv(dst, src); \
1708 #define SvSetSV_nosteal_and(dst,src,finally) \
1710 if ((dst) != (src)) { \
1711 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL); \
1716 #define SvSetSV(dst,src) \
1717 SvSetSV_and(dst,src,/*nothing*/;)
1718 #define SvSetSV_nosteal(dst,src) \
1719 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1721 #define SvSetMagicSV(dst,src) \
1722 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1723 #define SvSetMagicSV_nosteal(dst,src) \
1724 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1727 #if !defined(SKIP_DEBUGGING)
1728 #define SvPEEK(sv) sv_peek(sv)
1730 #define SvPEEK(sv) ""
1733 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1735 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1737 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1738 /* If I give every macro argument a different name, then there won't be bugs
1739 where nested macros get confused. Been there, done that. */
1740 #define isGV_with_GP(pwadak) \
1741 (((SvFLAGS(pwadak) & (SVp_POK|SVp_SCREAM)) == SVp_SCREAM) \
1742 && (SvTYPE(pwadak) == SVt_PVGV || SvTYPE(pwadak) == SVt_PVLV))
1744 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1745 #define SvGROW_mutable(sv,len) \
1746 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
1747 #define Sv_Grow sv_grow
1749 #define CLONEf_COPY_STACKS 1
1750 #define CLONEf_KEEP_PTR_TABLE 2
1751 #define CLONEf_CLONE_HOST 4
1752 #define CLONEf_JOIN_IN 8
1754 struct clone_params {
1757 PerlInterpreter *proto_perl;
1762 * c-indentation-style: bsd
1764 * indent-tabs-mode: t
1767 * ex: set ts=8 sts=4 sw=4 noet: