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 */ \
103 struct STRUCT_SV { /* struct sv { */
106 #ifdef DEBUG_LEAKING_SCALARS
107 unsigned sv_debug_optype:9; /* the type of OP that allocated us */
108 unsigned sv_debug_inpad:1; /* was allocated in a pad for an OP */
109 unsigned sv_debug_cloned:1; /* was cloned for an ithread */
110 unsigned sv_debug_line:16; /* the line where we were allocated */
111 char * sv_debug_file; /* the file where we were allocated */
116 _SV_HEAD(XPVGV*); /* pointer to xpvgv body */
121 _SV_HEAD(XPVCV*); /* pointer to xpvcv body */
126 _SV_HEAD(XPVAV*); /* pointer to xpvav body */
131 _SV_HEAD(XPVHV*); /* pointer to xpvhv body */
136 _SV_HEAD(XPVIO*); /* pointer to xpvio body */
141 #undef _SV_HEAD_UNION /* ensure no pollution */
144 =head1 SV Manipulation Functions
146 =for apidoc Am|U32|SvREFCNT|SV* sv
147 Returns the value of the object's reference count.
149 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
150 Increments the reference count of the given SV.
152 =for apidoc Am|void|SvREFCNT_dec|SV* sv
153 Decrements the reference count of the given SV.
155 =for apidoc Am|svtype|SvTYPE|SV* sv
156 Returns the type of the SV. See C<svtype>.
158 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
159 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
160 perform the upgrade if necessary. See C<svtype>.
165 #define SvANY(sv) (sv)->sv_any
166 #define SvFLAGS(sv) (sv)->sv_flags
167 #define SvREFCNT(sv) (sv)->sv_refcnt
169 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
170 # define SvREFCNT_inc(sv) \
172 SV * const _sv = (SV*)(sv); \
178 # define SvREFCNT_inc(sv) \
179 ((PL_Sv=(SV*)(sv)) ? ((++(SvREFCNT(PL_Sv))),(PL_Sv)) : NULL)
182 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
183 # define SvREFCNT_dec(sv) \
185 SV * const _sv = (SV*)(sv); \
187 if (SvREFCNT(_sv)) { \
188 if (--(SvREFCNT(_sv)) == 0) \
189 Perl_sv_free2(aTHX_ _sv); \
196 #define SvREFCNT_dec(sv) sv_free((SV*)(sv))
199 #define SVTYPEMASK 0xff
200 #define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK)
202 /* Sadly there are some parts of the core that have pointers to already-freed
203 SV heads, and rely on being able to tell that they are now free. So mark
204 them all by using a consistent macro. */
205 #define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
207 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= (mt) || (sv_upgrade(sv, mt), 1))
209 #define SVf_IOK 0x00000100 /* has valid public integer value */
210 #define SVf_NOK 0x00000200 /* has valid public numeric value */
211 #define SVf_POK 0x00000400 /* has valid public pointer value */
212 #define SVf_ROK 0x00000800 /* has a valid reference pointer */
214 #define SVp_IOK 0x00001000 /* has valid non-public integer value */
215 #define SVp_NOK 0x00002000 /* has valid non-public numeric value */
216 #define SVp_POK 0x00004000 /* has valid non-public pointer value */
217 #define SVp_SCREAM 0x00008000 /* has been studied? */
218 #define SVphv_CLONEABLE 0x00008000 /* PVHV (stashes) clone its objects */
220 #define SVs_PADSTALE 0x00010000 /* lexical has gone out of scope */
221 #define SVs_PADTMP 0x00020000 /* in use as tmp */
222 #define SVpad_TYPED 0x00020000 /* pad name is a Typed Lexical */
223 #define SVs_PADMY 0x00040000 /* in use a "my" variable */
224 #define SVpad_OUR 0x00040000 /* pad name is "our" instead of "my" */
225 #define SVs_TEMP 0x00080000 /* string is stealable? */
226 #define SVs_OBJECT 0x00100000 /* is "blessed" */
227 #define SVs_GMG 0x00200000 /* has magical get method */
228 #define SVs_SMG 0x00400000 /* has magical set method */
229 #define SVs_RMG 0x00800000 /* has random magical methods */
231 #define SVf_FAKE 0x01000000 /* 0: glob or lexical is just a copy
232 1: SV head arena wasn't malloc()ed
233 2: in conjunction with SVf_READONLY
234 marks a shared hash key scalar
235 (SvLEN == 0) or a copy on write
236 string (SvLEN != 0) [SvIsCOW(sv)]
237 3: For PVCV, whether CvUNIQUE(cv)
238 refers to an eval or once only
239 [CvEVAL(cv), CvSPECIAL(cv)]
240 4: Whether the regexp pointer is in
241 fact an offset [SvREPADTMP(sv)]
242 5: On a pad name SV, that slot in the
243 frame AV is a REFCNT'ed reference
244 to a lexical from "outside".
246 #define SVf_OOK 0x02000000 /* has valid offset value
247 For a PVHV this means that a
248 hv_aux struct is present after the
250 #define SVf_BREAK 0x04000000 /* refcnt is artificially low - used
251 * by SV's in final arena cleanup */
252 #define SVf_READONLY 0x08000000 /* may not be modified */
257 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
259 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
260 SVp_IOK|SVp_NOK|SVp_POK|SVp_SCREAM)
262 #define PRIVSHIFT 4 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
264 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
265 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded */
266 /* Ensure this value does not clash with the GV_ADD* flags in gv.h */
268 /* Some private flags. */
271 #define SVphv_REHASH 0x10000000 /* PVHV is recalculating hash values */
273 #define SVphv_SHAREKEYS 0x20000000 /* PVHV
274 keys live on shared string table */
275 /* PVNV, PVMG, PVGV, presumably only inside pads */
276 #define SVpad_NAME 0x40000000 /* This SV is a name in the PAD, so
277 SVpad_TYPED and SVpad_OUR apply */
279 #define SVpav_REAL 0x40000000 /* free old entries */
281 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
283 #define SVpbm_TAIL 0x40000000
285 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
287 /* IV, PVIV, PVNV, PVMG, PVGV and (I assume) PVLV */
288 /* Presumably IVs aren't stored in pads */
289 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
291 #define SVpav_REIFY 0x80000000 /* can become real */
293 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
295 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
297 #define SVpbm_VALID 0x80000000
298 /* RV upwards. However, SVf_ROK and SVp_IOK are exclusive */
299 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
303 NV xnv_nv; /* numeric value, if any */
304 STRLEN xpv_cur; /* length of svu_pv as a C string */
305 STRLEN xpv_len; /* allocated size */
309 typedef struct xpv xpv_allocated;
312 STRLEN xpv_cur; /* length of svu_pv as a C string */
313 STRLEN xpv_len; /* allocated size */
318 NV xnv_nv; /* numeric value, if any */
319 STRLEN xpv_cur; /* length of svu_pv as a C string */
320 STRLEN xpv_len; /* allocated size */
322 IV xivu_iv; /* integer value or pv offset */
330 typedef struct xpviv xpviv_allocated;
333 STRLEN xpv_cur; /* length of svu_pv as a C string */
334 STRLEN xpv_len; /* allocated size */
336 IV xivu_iv; /* integer value or pv offset */
344 #define xiv_iv xiv_u.xivu_iv
347 NV xnv_nv; /* numeric value, if any */
348 STRLEN xpv_cur; /* length of svu_pv as a C string */
349 STRLEN xpv_len; /* allocated size */
352 UV xuvu_uv; /* unsigned value or pv offset */
357 #define xuv_uv xuv_u.xuvu_uv
360 NV xnv_nv; /* numeric value, if any */
361 STRLEN xpv_cur; /* length of svu_pv as a C string */
362 STRLEN xpv_len; /* allocated size */
364 IV xivu_iv; /* integer value or pv offset */
371 /* These structure must match the beginning of struct xpvhv in hv.h. */
373 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 */
382 MAGIC* xmg_magic; /* linked list of magicalness */
383 HV* xmg_stash; /* class package */
387 NV xnv_nv; /* numeric value, if any */
388 STRLEN xpv_cur; /* length of svu_pv as a C string */
389 STRLEN xpv_len; /* allocated size */
391 IV xivu_iv; /* integer value or pv offset */
396 MAGIC* xmg_magic; /* linked list of magicalness */
397 HV* xmg_stash; /* class package */
399 /* a full glob fits into this */
409 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
410 * y=alem/helem/iter t=tie T=tied HE */
414 NV xnv_nv; /* numeric value, if any */
415 STRLEN xpv_cur; /* length of svu_pv as a C string */
416 STRLEN xpv_len; /* allocated size */
418 IV xivu_iv; /* integer value or pv offset */
423 MAGIC* xmg_magic; /* linked list of magicalness */
424 HV* xmg_stash; /* class package */
434 NV xnv_nv; /* numeric value, if any */
435 STRLEN xpv_cur; /* length of svu_pv as a C string */
436 STRLEN xpv_len; /* allocated size */
438 IV xivu_iv; /* integer value or pv offset */
443 MAGIC* xmg_magic; /* linked list of magicalness */
444 HV* xmg_stash; /* class package */
446 I32 xbm_useful; /* is this constant pattern being useful? */
447 U16 xbm_previous; /* how many characters in string before rare? */
448 U8 xbm_rare; /* rarest character in string */
451 /* This structure must match XPVCV in cv.h */
453 typedef U16 cv_flags_t;
456 NV xnv_nv; /* numeric value, if any */
457 STRLEN xpv_cur; /* length of svu_pv as a C string */
458 STRLEN xpv_len; /* allocated size */
460 IV xivu_iv; /* PVFMs use the pv offset */
465 MAGIC* xmg_magic; /* linked list of magicalness */
466 HV* xmg_stash; /* class package */
475 void (*xcv_xsub) (pTHX_ CV*);
481 U32 xcv_outside_seq; /* the COP sequence (at the point of our
482 * compilation) in the lexically enclosing
484 cv_flags_t xcv_flags;
489 STRLEN xpv_cur; /* length of svu_pv as a C string */
490 STRLEN xpv_len; /* allocated size */
492 IV xivu_iv; /* PVFMs use the pv offset */
497 MAGIC* xmg_magic; /* linked list of magicalness */
498 HV* xmg_stash; /* class package */
507 void (*xcv_xsub) (pTHX_ CV*);
513 U32 xcv_outside_seq; /* the COP sequence (at the point of our
514 * compilation) in the lexically enclosing
516 cv_flags_t xcv_flags;
521 NV xnv_nv; /* numeric value, if any */
522 STRLEN xpv_cur; /* length of svu_pv as a C string */
523 STRLEN xpv_len; /* allocated size */
525 IV xivu_iv; /* integer value or pv offset */
530 MAGIC* xmg_magic; /* linked list of magicalness */
531 HV* xmg_stash; /* class package */
533 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
534 PerlIO * xio_ofp; /* but sockets need separate streams */
535 /* Cray addresses everything by word boundaries (64 bits) and
536 * code and data pointers cannot be mixed (which is exactly what
537 * Perl_filter_add() tries to do with the dirp), hence the following
538 * union trick (as suggested by Gurusamy Sarathy).
539 * For further information see Geir Johansen's problem report titled
540 [ID 20000612.002] Perl problem on Cray system
541 * The any pointer (known as IoANY()) will also be a good place
542 * to hang any IO disciplines to.
545 DIR * xiou_dirp; /* for opendir, readdir, etc */
546 void * xiou_any; /* for alignment */
548 IV xio_lines; /* $. */
549 IV xio_page; /* $% */
550 IV xio_page_len; /* $= */
551 IV xio_lines_left; /* $- */
552 char * xio_top_name; /* $^ */
553 GV * xio_top_gv; /* $^ */
554 char * xio_fmt_name; /* $~ */
555 GV * xio_fmt_gv; /* $~ */
556 char * xio_bottom_name;/* $^B */
557 GV * xio_bottom_gv; /* $^B */
558 short xio_subprocess; /* -| or |- */
562 #define xio_dirp xio_dirpu.xiou_dirp
563 #define xio_any xio_dirpu.xiou_any
565 #define IOf_ARGV 1 /* this fp iterates over ARGV */
566 #define IOf_START 2 /* check for null ARGV and substitute '-' */
567 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
568 #define IOf_DIDTOP 8 /* just did top of form */
569 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
570 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
571 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
573 /* The following macros define implementation-independent predicates on SVs. */
576 =for apidoc Am|bool|SvNIOK|SV* sv
577 Returns a boolean indicating whether the SV contains a number, integer or
580 =for apidoc Am|bool|SvNIOKp|SV* sv
581 Returns a boolean indicating whether the SV contains a number, integer or
582 double. Checks the B<private> setting. Use C<SvNIOK>.
584 =for apidoc Am|void|SvNIOK_off|SV* sv
585 Unsets the NV/IV status of an SV.
587 =for apidoc Am|bool|SvOK|SV* sv
588 Returns a boolean indicating whether the value is an SV. It also tells
589 whether the value is defined or not.
591 =for apidoc Am|bool|SvIOKp|SV* sv
592 Returns a boolean indicating whether the SV contains an integer. Checks
593 the B<private> setting. Use C<SvIOK>.
595 =for apidoc Am|bool|SvNOKp|SV* sv
596 Returns a boolean indicating whether the SV contains a double. Checks the
597 B<private> setting. Use C<SvNOK>.
599 =for apidoc Am|bool|SvPOKp|SV* sv
600 Returns a boolean indicating whether the SV contains a character string.
601 Checks the B<private> setting. Use C<SvPOK>.
603 =for apidoc Am|bool|SvIOK|SV* sv
604 Returns a boolean indicating whether the SV contains an integer.
606 =for apidoc Am|void|SvIOK_on|SV* sv
607 Tells an SV that it is an integer.
609 =for apidoc Am|void|SvIOK_off|SV* sv
610 Unsets the IV status of an SV.
612 =for apidoc Am|void|SvIOK_only|SV* sv
613 Tells an SV that it is an integer and disables all other OK bits.
615 =for apidoc Am|void|SvIOK_only_UV|SV* sv
616 Tells and SV that it is an unsigned integer and disables all other OK bits.
618 =for apidoc Am|bool|SvIOK_UV|SV* sv
619 Returns a boolean indicating whether the SV contains an unsigned integer.
621 =for apidoc Am|void|SvUOK|SV* sv
622 Returns a boolean indicating whether the SV contains an unsigned integer.
624 =for apidoc Am|bool|SvIOK_notUV|SV* sv
625 Returns a boolean indicating whether the SV contains a signed integer.
627 =for apidoc Am|bool|SvNOK|SV* sv
628 Returns a boolean indicating whether the SV contains a double.
630 =for apidoc Am|void|SvNOK_on|SV* sv
631 Tells an SV that it is a double.
633 =for apidoc Am|void|SvNOK_off|SV* sv
634 Unsets the NV status of an SV.
636 =for apidoc Am|void|SvNOK_only|SV* sv
637 Tells an SV that it is a double and disables all other OK bits.
639 =for apidoc Am|bool|SvPOK|SV* sv
640 Returns a boolean indicating whether the SV contains a character
643 =for apidoc Am|void|SvPOK_on|SV* sv
644 Tells an SV that it is a string.
646 =for apidoc Am|void|SvPOK_off|SV* sv
647 Unsets the PV status of an SV.
649 =for apidoc Am|void|SvPOK_only|SV* sv
650 Tells an SV that it is a string and disables all other OK bits.
651 Will also turn off the UTF-8 status.
653 =for apidoc Am|bool|SvVOK|SV* sv
654 Returns a boolean indicating whether the SV contains a v-string.
656 =for apidoc Am|bool|SvOOK|SV* sv
657 Returns a boolean indicating whether the SvIVX is a valid offset value for
658 the SvPVX. This hack is used internally to speed up removal of characters
659 from the beginning of a SvPV. When SvOOK is true, then the start of the
660 allocated string buffer is really (SvPVX - SvIVX).
662 =for apidoc Am|bool|SvROK|SV* sv
663 Tests if the SV is an RV.
665 =for apidoc Am|void|SvROK_on|SV* sv
666 Tells an SV that it is an RV.
668 =for apidoc Am|void|SvROK_off|SV* sv
669 Unsets the RV status of an SV.
671 =for apidoc Am|SV*|SvRV|SV* sv
672 Dereferences an RV to return the SV.
674 =for apidoc Am|IV|SvIVX|SV* sv
675 Returns the raw value in the SV's IV slot, without checks or conversions.
676 Only use when you are sure SvIOK is true. See also C<SvIV()>.
678 =for apidoc Am|UV|SvUVX|SV* sv
679 Returns the raw value in the SV's UV slot, without checks or conversions.
680 Only use when you are sure SvIOK is true. See also C<SvUV()>.
682 =for apidoc Am|NV|SvNVX|SV* sv
683 Returns the raw value in the SV's NV slot, without checks or conversions.
684 Only use when you are sure SvNOK is true. See also C<SvNV()>.
686 =for apidoc Am|char*|SvPVX|SV* sv
687 Returns a pointer to the physical string in the SV. The SV must contain a
690 =for apidoc Am|STRLEN|SvCUR|SV* sv
691 Returns the length of the string which is in the SV. See C<SvLEN>.
693 =for apidoc Am|STRLEN|SvLEN|SV* sv
694 Returns the size of the string buffer in the SV, not including any part
695 attributable to C<SvOOK>. See C<SvCUR>.
697 =for apidoc Am|char*|SvEND|SV* sv
698 Returns a pointer to the last character in the string which is in the SV.
699 See C<SvCUR>. Access the character as *(SvEND(sv)).
701 =for apidoc Am|HV*|SvSTASH|SV* sv
702 Returns the stash of the SV.
704 =for apidoc Am|void|SvIV_set|SV* sv|IV val
705 Set the value of the IV pointer in sv to val. It is possible to perform
706 the same function of this macro with an lvalue assignment to C<SvIVX>.
707 With future Perls, however, it will be more efficient to use
708 C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
710 =for apidoc Am|void|SvNV_set|SV* sv|NV val
711 Set the value of the NV pointer in sv to val. See C<SvIV_set>.
713 =for apidoc Am|void|SvPV_set|SV* sv|char* val
714 Set the value of the PV pointer in sv to val. See C<SvIV_set>.
716 =for apidoc Am|void|SvUV_set|SV* sv|UV val
717 Set the value of the UV pointer in sv to val. See C<SvIV_set>.
719 =for apidoc Am|void|SvRV_set|SV* sv|SV* val
720 Set the value of the RV pointer in sv to val. See C<SvIV_set>.
722 =for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
723 Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>.
725 =for apidoc Am|void|SvSTASH_set|SV* sv|STASH* val
726 Set the value of the STASH pointer in sv to val. See C<SvIV_set>.
728 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
729 Set the current length of the string which is in the SV. See C<SvCUR>
732 =for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
733 Set the actual length of the string which is in the SV. See C<SvIV_set>.
738 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
739 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
740 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
741 SVp_IOK|SVp_NOK|SVf_IVisUV))
743 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
744 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
746 #define assert_not_ROK(sv)
749 #define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
750 #define SvOK_off(sv) (assert_not_ROK(sv) \
751 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
752 SVf_IVisUV|SVf_UTF8), \
754 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
755 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
759 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
760 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
761 #define SvIOKp_on(sv) (SvRELEASE_IVX(sv), \
762 SvFLAGS(sv) |= SVp_IOK)
763 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
764 #define SvNOKp_on(sv) (SvFLAGS(sv) |= SVp_NOK)
765 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
766 #define SvPOKp_on(sv) (assert_not_ROK(sv) \
767 SvFLAGS(sv) |= SVp_POK)
769 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
770 #define SvIOK_on(sv) (SvRELEASE_IVX(sv), \
771 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
772 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
773 #define SvIOK_only(sv) (SvOK_off(sv), \
774 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
775 #define SvIOK_only_UV(sv) (SvOK_off_exc_UV(sv), \
776 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
778 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
779 == (SVf_IOK|SVf_IVisUV))
780 #define SvUOK(sv) SvIOK_UV(sv)
781 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
784 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
785 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
786 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
788 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
789 #define SvNOK_on(sv) (SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
790 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
791 #define SvNOK_only(sv) (SvOK_off(sv), \
792 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
795 =for apidoc Am|bool|SvUTF8|SV* sv
796 Returns a boolean indicating whether the SV contains UTF-8 encoded data.
798 =for apidoc Am|void|SvUTF8_on|SV *sv
799 Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
800 Do not use frivolously.
802 =for apidoc Am|void|SvUTF8_off|SV *sv
803 Unsets the UTF-8 status of an SV.
805 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
806 Tells an SV that it is a string and disables all other OK bits,
807 and leaves the UTF-8 status as it was.
812 /* Ensure the return value of this macro does not clash with the GV_ADD* flags
814 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
815 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
816 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
818 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
819 #define SvPOK_on(sv) (assert_not_ROK(sv) \
820 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
821 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
822 #define SvPOK_only(sv) (assert_not_ROK(sv) \
823 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
824 SVf_IVisUV|SVf_UTF8), \
825 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
826 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) \
827 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
829 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
831 #define SvVOK(sv) (SvMAGICAL(sv) \
832 ? mg_find(sv,PERL_MAGIC_vstring) : NULL)
833 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
834 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
835 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
837 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
838 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
839 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
841 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
842 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
843 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVf_AMAGIC))
845 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
846 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
847 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
849 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
850 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
851 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
853 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
854 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
855 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
857 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
858 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
859 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
861 #define SvAMAGIC(sv) (SvFLAGS(sv) & SVf_AMAGIC)
862 #define SvAMAGIC_on(sv) (SvFLAGS(sv) |= SVf_AMAGIC)
863 #define SvAMAGIC_off(sv) (SvFLAGS(sv) &= ~SVf_AMAGIC)
865 #define SvGAMAGIC(sv) (SvFLAGS(sv) & (SVs_GMG|SVf_AMAGIC))
868 #define Gv_AMG(stash) \
869 (HV_AMAGICmb(stash) && \
870 ((!HV_AMAGICbad(stash) && HV_AMAGIC(stash)) || Gv_AMupdate(stash)))
872 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
874 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
875 == (SVf_ROK|SVprv_WEAKREF))
876 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
877 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
879 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
881 #define SvPADSTALE(sv) (SvFLAGS(sv) & SVs_PADSTALE)
882 #define SvPADSTALE_on(sv) (SvFLAGS(sv) |= SVs_PADSTALE)
883 #define SvPADSTALE_off(sv) (SvFLAGS(sv) &= ~SVs_PADSTALE)
885 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
886 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
887 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
889 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
890 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY)
892 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
893 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
894 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
896 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
897 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
898 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
900 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
901 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
902 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
904 #define SvSCREAM(sv) ((SvFLAGS(sv) & (SVp_SCREAM|SVp_POK)) == (SVp_SCREAM|SVp_POK))
905 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
906 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
908 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
909 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
910 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
912 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
913 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
914 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
916 #define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL)
917 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
918 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
920 #define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
921 #define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
922 #define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
925 /* The following uses the FAKE flag to show that a regex pointer is infact
926 its own offset in the regexpad for ithreads */
927 #define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
928 #define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
929 #define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
932 #define SvPAD_TYPED(sv) \
933 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_TYPED)) == (SVpad_NAME|SVpad_TYPED))
934 #define SvPAD_TYPED_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_TYPED)
936 #define SvPAD_OUR(sv) \
937 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_OUR)) == (SVpad_NAME|SVpad_OUR))
938 #define SvPAD_OUR_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_OUR)
940 #define OURSTASH(sv) (SvPAD_OUR(sv) ? GvSTASH(sv) : NULL)
941 #define OURSTASH_set(sv, st) \
943 assert(SvTYPE(sv) == SVt_PVGV); \
947 #ifdef PERL_DEBUG_COW
948 #define SvRV(sv) (0 + (sv)->sv_u.svu_rv)
950 #define SvRV(sv) ((sv)->sv_u.svu_rv)
952 #define SvRVx(sv) SvRV(sv)
954 #ifdef PERL_DEBUG_COW
955 /* Need -0.0 for SvNVX to preserve IEEE FP "negative zero" because
956 +0.0 + -0.0 => +0.0 but -0.0 + -0.0 => -0.0 */
957 # define SvIVX(sv) (0 + ((XPVIV*) SvANY(sv))->xiv_iv)
958 # define SvUVX(sv) (0 + ((XPVUV*) SvANY(sv))->xuv_uv)
959 # define SvNVX(sv) (-0.0 + ((XPVNV*) SvANY(sv))->xnv_nv)
960 /* Don't test the core XS code yet. */
961 # if defined (PERL_CORE) && PERL_DEBUG_COW > 1
962 # define SvPVX(sv) (0 + (assert(!SvREADONLY(sv)), (sv)->sv_u.svu_pv))
964 # define SvPVX(sv) SvPVX_mutable(sv)
966 # define SvCUR(sv) (0 + ((XPV*) SvANY(sv))->xpv_cur)
967 # define SvLEN(sv) (0 + ((XPV*) SvANY(sv))->xpv_len)
968 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
972 /* Can't make this RVALUE because of Perl_sv_unmagic. */
973 # define SvMAGIC(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
975 # define SvMAGIC(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
977 # define SvSTASH(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
980 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
982 # define SvMAGIC(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_magic)
984 # define SvSTASH(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_stash)
987 # define SvPVX(sv) ((sv)->sv_u.svu_pv)
988 # define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
989 # define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
990 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
992 # if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
993 /* These get expanded inside other macros that already use a variable _sv */
995 (*({ SV *const _svi = (SV *) sv; \
996 assert(SvTYPE(_svi) == SVt_IV || SvTYPE(_svi) >= SVt_PVIV); \
997 assert(SvTYPE(_svi) != SVt_PVAV); \
998 assert(SvTYPE(_svi) != SVt_PVHV); \
999 assert(SvTYPE(_svi) != SVt_PVCV); \
1000 &(((XPVIV*) SvANY(_svi))->xiv_iv); \
1002 # define SvUVX(sv) \
1003 (*({ SV *const _svi = (SV *) sv; \
1004 assert(SvTYPE(_svi) == SVt_IV || SvTYPE(_svi) >= SVt_PVIV); \
1005 assert(SvTYPE(_svi) != SVt_PVAV); \
1006 assert(SvTYPE(_svi) != SVt_PVHV); \
1007 assert(SvTYPE(_svi) != SVt_PVCV); \
1008 &(((XPVUV*) SvANY(_svi))->xuv_uv); \
1010 # define SvNVX(sv) \
1011 (*({ SV *const _svi = (SV *) sv; \
1012 assert(SvTYPE(_svi) == SVt_NV || SvTYPE(_svi) >= SVt_PVNV); \
1013 assert(SvTYPE(_svi) != SVt_PVAV); \
1014 assert(SvTYPE(_svi) != SVt_PVHV); \
1015 assert(SvTYPE(_svi) != SVt_PVFM); \
1016 &(((XPVNV*) SvANY(_svi))->xnv_nv); \
1018 # define SvMAGIC(sv) \
1019 (*({ SV *const _svi = (SV *) sv; \
1020 assert(SvTYPE(_svi) >= SVt_PVMG); \
1021 if (SvTYPE(_svi) == SVt_PVMG && (SvFLAGS(_svi) & SVpad_NAME)) \
1022 assert (!((XPVMG*) SvANY(_svi))->xmg_magic); \
1023 &(((XPVMG*) SvANY(_svi))->xmg_magic); \
1025 # define SvSTASH(sv) \
1026 (*({ SV *const _svi = (SV *) sv; \
1027 assert(SvTYPE(_svi) >= SVt_PVMG); \
1028 &(((XPVMG*) SvANY(_svi))->xmg_stash); \
1031 # define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
1032 # define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
1033 # define SvNVX(sv) ((XPVNV*) SvANY(sv))->xnv_nv
1034 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
1035 # define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
1040 /* Given that these two are new, there can't be any existing code using them
1042 # define SvPVX_mutable(sv) (0 + (sv)->sv_u.svu_pv)
1043 # define SvPVX_const(sv) ((const char*)(0 + (sv)->sv_u.svu_pv))
1045 /* Except for the poison code, which uses & to scribble over the pointer after
1046 free() is called. */
1047 # define SvPVX_mutable(sv) ((sv)->sv_u.svu_pv)
1048 # define SvPVX_const(sv) ((const char*)((sv)->sv_u.svu_pv))
1051 #define SvIVXx(sv) SvIVX(sv)
1052 #define SvUVXx(sv) SvUVX(sv)
1053 #define SvNVXx(sv) SvNVX(sv)
1054 #define SvPVXx(sv) SvPVX(sv)
1055 #define SvLENx(sv) SvLEN(sv)
1056 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
1059 /* Ask a scalar nicely to try to become an IV, if possible.
1060 Not guaranteed to stay returning void */
1061 /* Macro won't actually call sv_2iv if already IOK */
1062 #define SvIV_please(sv) \
1063 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
1064 (void) SvIV(sv); } STMT_END
1065 #define SvIV_set(sv, val) \
1066 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1067 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
1068 #define SvNV_set(sv, val) \
1069 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
1070 assert(SvTYPE(sv) != SVt_PVAV); assert(SvTYPE(sv) != SVt_PVHV); \
1071 (((XPVNV*)SvANY(sv))->xnv_nv = (val)); } STMT_END
1072 #define SvPV_set(sv, val) \
1073 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1074 ((sv)->sv_u.svu_pv = (val)); } STMT_END
1075 #define SvUV_set(sv, val) \
1076 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1077 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
1078 #define SvRV_set(sv, val) \
1079 STMT_START { assert(SvTYPE(sv) >= SVt_RV); \
1080 ((sv)->sv_u.svu_rv = (val)); } STMT_END
1081 #define SvMAGIC_set(sv, val) \
1082 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1083 (((XPVMG*)SvANY(sv))->xmg_magic = (val)); } STMT_END
1084 #define SvSTASH_set(sv, val) \
1085 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1086 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
1087 #define SvCUR_set(sv, val) \
1088 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1089 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
1090 #define SvLEN_set(sv, val) \
1091 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1092 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
1093 #define SvEND_set(sv, val) \
1094 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1095 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
1097 #define SvPV_renew(sv,n) \
1098 STMT_START { SvLEN_set(sv, n); \
1099 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
1100 (char*)saferealloc((Malloc_t)SvPVX(sv), \
1101 (MEM_SIZE)((n))))); \
1104 #define SvPV_shrink_to_cur(sv) STMT_START { \
1105 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
1106 SvPV_renew(sv, _lEnGtH); \
1109 #define SvPV_free(sv) \
1111 assert(SvTYPE(sv) >= SVt_PV); \
1114 SvPV_set(sv, SvPVX_mutable(sv) - SvIVX(sv)); \
1115 SvFLAGS(sv) &= ~SVf_OOK; \
1117 Safefree(SvPVX(sv)); \
1121 #define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
1122 #define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
1123 #define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
1125 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
1127 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
1128 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
1129 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
1130 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
1132 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
1133 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
1134 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
1135 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
1136 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
1137 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
1138 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
1139 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
1140 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
1141 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
1142 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
1143 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
1144 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
1145 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
1146 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
1147 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1148 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1150 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
1151 #define IoTYPE_RDONLY '<'
1152 #define IoTYPE_WRONLY '>'
1153 #define IoTYPE_RDWR '+'
1154 #define IoTYPE_APPEND 'a'
1155 #define IoTYPE_PIPE '|'
1156 #define IoTYPE_STD '-' /* stdin or stdout */
1157 #define IoTYPE_SOCKET 's'
1158 #define IoTYPE_CLOSED ' '
1159 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1160 #define IoTYPE_NUMERIC '#' /* fdopen */
1163 =for apidoc Am|bool|SvTAINTED|SV* sv
1164 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
1167 =for apidoc Am|void|SvTAINTED_on|SV* sv
1168 Marks an SV as tainted if tainting is enabled.
1170 =for apidoc Am|void|SvTAINTED_off|SV* sv
1171 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1172 some of Perl's fundamental security features. XS module authors should not
1173 use this function unless they fully understand all the implications of
1174 unconditionally untainting the value. Untainting should be done in the
1175 standard perl fashion, via a carefully crafted regexp, rather than directly
1176 untainting variables.
1178 =for apidoc Am|void|SvTAINT|SV* sv
1179 Taints an SV if tainting is enabled.
1184 #define sv_taint(sv) sv_magic((sv), NULL, PERL_MAGIC_taint, NULL, 0)
1186 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1187 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
1188 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
1190 #define SvTAINT(sv) \
1192 if (PL_tainting) { \
1199 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
1200 Like C<SvPV> but will force the SV into containing just a string
1201 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1204 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
1205 Like C<SvPV> but will force the SV into containing just a string
1206 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1207 directly. Doesn't process magic.
1209 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
1210 Returns a pointer to the string in the SV, or a stringified form of
1211 the SV if the SV does not contain a string. The SV may cache the
1212 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
1213 C<SvPVx> for a version which guarantees to evaluate sv only once.
1215 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
1216 A version of C<SvPV> which guarantees to evaluate sv only once.
1218 =for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1219 Like C<SvPV> but doesn't process magic.
1221 =for apidoc Am|char*|SvPV_nolen|SV* sv
1222 Returns a pointer to the string in the SV, or a stringified form of
1223 the SV if the SV does not contain a string. The SV may cache the
1224 stringified form becoming C<SvPOK>. Handles 'get' magic.
1226 =for apidoc Am|IV|SvIV|SV* sv
1227 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
1228 version which guarantees to evaluate sv only once.
1230 =for apidoc Am|IV|SvIV_nomg|SV* sv
1231 Like C<SvIV> but doesn't process magic.
1233 =for apidoc Am|IV|SvIVx|SV* sv
1234 Coerces the given SV to an integer and returns it. Guarantees to evaluate
1235 sv only once. Use the more efficient C<SvIV> otherwise.
1237 =for apidoc Am|NV|SvNV|SV* sv
1238 Coerce the given SV to a double and return it. See C<SvNVx> for a version
1239 which guarantees to evaluate sv only once.
1241 =for apidoc Am|NV|SvNVx|SV* sv
1242 Coerces the given SV to a double and returns it. Guarantees to evaluate
1243 sv only once. Use the more efficient C<SvNV> otherwise.
1245 =for apidoc Am|UV|SvUV|SV* sv
1246 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
1247 for a version which guarantees to evaluate sv only once.
1249 =for apidoc Am|UV|SvUV_nomg|SV* sv
1250 Like C<SvUV> but doesn't process magic.
1252 =for apidoc Am|UV|SvUVx|SV* sv
1253 Coerces the given SV to an unsigned integer and returns it. Guarantees to
1254 evaluate sv only once. Use the more efficient C<SvUV> otherwise.
1256 =for apidoc Am|bool|SvTRUE|SV* sv
1257 Returns a boolean indicating whether Perl would evaluate the SV as true or
1258 false, defined or undefined. Does not handle 'get' magic.
1260 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
1261 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1263 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
1264 Like C<SvPV>, but converts sv to utf8 first if necessary.
1266 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1267 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
1269 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1270 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1272 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1273 Like C<SvPV>, but converts sv to byte representation first if necessary.
1275 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1276 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1278 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1279 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1280 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1283 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1284 Like C<SvPV>, but converts sv to utf8 first if necessary.
1285 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1288 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1289 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1290 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1293 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1294 Like C<SvPV>, but converts sv to byte representation first if necessary.
1295 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1298 =for apidoc Am|bool|SvIsCOW|SV* sv
1299 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1300 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1303 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1304 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1307 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1308 Like C<sv_catpvn> but doesn't process magic.
1310 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1311 Like C<sv_setsv> but doesn't process magic.
1313 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1314 Like C<sv_catsv> but doesn't process magic.
1319 /* Let us hope that bitmaps for UV and IV are the same */
1320 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1321 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1322 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1324 #define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1325 #define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1329 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1330 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1331 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1333 #define SvPV_flags(sv, lp, flags) \
1334 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1335 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1336 #define SvPV_flags_const(sv, lp, flags) \
1337 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1338 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1339 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1340 #define SvPV_flags_const_nolen(sv, flags) \
1341 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1342 ? SvPVX_const(sv) : \
1343 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN))
1344 #define SvPV_flags_mutable(sv, lp, flags) \
1345 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1346 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1347 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1349 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1350 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1351 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1353 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1354 #define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
1356 #define SvPV_force_flags(sv, lp, flags) \
1357 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1358 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1359 #define SvPV_force_flags_nolen(sv, flags) \
1360 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1361 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1362 #define SvPV_force_flags_mutable(sv, lp, flags) \
1363 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1364 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1365 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1367 #define SvPV_nolen(sv) \
1368 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1369 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1371 #define SvPV_nolen_const(sv) \
1372 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1373 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1375 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1376 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1377 #define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
1381 #define SvPVutf8(sv, lp) \
1382 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1383 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1385 #define SvPVutf8_force(sv, lp) \
1386 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1387 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1390 #define SvPVutf8_nolen(sv) \
1391 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1392 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1396 #define SvPVbyte(sv, lp) \
1397 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1398 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1400 #define SvPVbyte_force(sv, lp) \
1401 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1402 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1404 #define SvPVbyte_nolen(sv) \
1405 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1406 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1410 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1411 * var to evaluate the arg once; failing that, use a global if possible;
1412 * failing that, call a function to do the work
1415 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1416 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1417 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1419 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1421 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1422 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1423 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1424 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1425 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1426 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1427 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1428 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1429 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1430 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1431 # define SvTRUE(sv) ( \
1435 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1437 (nxpv->xpv_cur > 1 || \
1438 (nxpv->xpv_cur && *(sv)->sv_u.svu_pv != '0')); }) \
1445 ? SvNVX(sv) != 0.0 \
1447 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1449 #else /* __GNUC__ */
1451 /* These inlined macros use globals, which will require a thread
1452 * declaration in user code, so we avoid them under threads */
1454 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1455 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1456 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1457 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1458 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1459 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1460 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1461 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1462 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1463 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1464 # define SvTRUE(sv) ( \
1468 ? ((PL_Xpv = (XPV*)SvANY(PL_Sv = (sv))) && \
1469 (PL_Xpv->xpv_cur > 1 || \
1470 (PL_Xpv->xpv_cur && *PL_Sv->sv_u.svu_pv != '0')) \
1477 ? SvNVX(sv) != 0.0 \
1479 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1480 #endif /* __GNU__ */
1482 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1483 (SVf_FAKE | SVf_READONLY))
1484 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1486 #define SvSHARED_HEK_FROM_PV(pvx) \
1487 ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
1488 #define SvSHARED_HASH(sv) (0 + SvSHARED_HEK_FROM_PV(SvPVX_const(sv))->hek_hash)
1490 /* flag values for sv_*_flags functions */
1491 #define SV_IMMEDIATE_UNREF 1
1493 #define SV_COW_DROP_PV 4
1494 #define SV_UTF8_NO_ENCODING 8
1495 #define SV_NOSTEAL 16
1496 #define SV_CONST_RETURN 32
1497 #define SV_MUTABLE_RETURN 64
1498 #define SV_SMAGIC 128
1500 #define sv_unref(sv) sv_unref_flags(sv, 0)
1501 #define sv_force_normal(sv) sv_force_normal_flags(sv, 0)
1503 /* We are about to replace the SV's current value. So if it's copy on write
1504 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1505 the value is about to get thrown away, so drop the PV rather than go to
1506 the effort of making a read-write copy only for it to get immediately
1509 #define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1510 sv_force_normal_flags(sv, SV_COW_DROP_PV)
1512 #ifdef PERL_OLD_COPY_ON_WRITE
1513 # define SvRELEASE_IVX(sv) ((void)((SvFLAGS(sv) & (SVf_OOK|SVf_READONLY|SVf_FAKE)) \
1514 && Perl_sv_release_IVX(aTHX_ sv)))
1515 # define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
1517 # define SvRELEASE_IVX(sv) SvOOK_off(sv)
1518 #endif /* PERL_OLD_COPY_ON_WRITE */
1520 #define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1521 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1522 SVf_OOK|SVf_BREAK|SVf_READONLY|SVf_AMAGIC)
1523 #define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1525 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1526 sv_force_normal_flags(sv, 0)
1529 /* all these 'functions' are now just macros */
1531 #define sv_pv(sv) SvPV_nolen(sv)
1532 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1533 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1535 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1536 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1537 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1538 #define sv_setsv(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_GMAGIC)
1539 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, 0)
1540 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1541 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1542 #define sv_catsv_mg(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC|SV_SMAGIC)
1543 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1544 #define sv_catpvn_mg(sv, sstr, slen) \
1545 sv_catpvn_flags(sv, sstr, slen, SV_GMAGIC|SV_SMAGIC);
1546 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1547 #define sv_2pv_nolen(sv) sv_2pv(sv, 0)
1548 #define sv_2pvbyte_nolen(sv) sv_2pvbyte(sv, 0)
1549 #define sv_2pvutf8_nolen(sv) sv_2pvutf8(sv, 0)
1550 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1551 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1552 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1553 #define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1554 #define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
1556 /* Should be named SvCatPVN_utf8_upgrade? */
1557 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1560 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1562 sv_setpvn(nsv, sstr, slen); \
1564 sv_utf8_upgrade(nsv); \
1565 sv_catsv(dsv, nsv); \
1569 =for apidoc Am|SV*|newRV_inc|SV* sv
1571 Creates an RV wrapper for an SV. The reference count for the original SV is
1577 #define newRV_inc(sv) newRV(sv)
1579 /* the following macros update any magic values this sv is associated with */
1582 =head1 Magical Functions
1584 =for apidoc Am|void|SvGETMAGIC|SV* sv
1585 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1586 argument more than once.
1588 =for apidoc Am|void|SvSETMAGIC|SV* sv
1589 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1590 argument more than once.
1592 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1593 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1596 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1597 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1598 ssv. May evaluate arguments more than once.
1600 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1601 Like C<SvSetSV>, but does any set magic required afterwards.
1603 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1604 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1606 =for apidoc Am|void|SvSHARE|SV* sv
1607 Arranges for sv to be shared between threads if a suitable module
1610 =for apidoc Am|void|SvLOCK|SV* sv
1611 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1614 =for apidoc Am|void|SvUNLOCK|SV* sv
1615 Releases a mutual exclusion lock on sv if a suitable module
1618 =head1 SV Manipulation Functions
1620 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1621 Expands the character buffer in the SV so that it has room for the
1622 indicated number of bytes (remember to reserve space for an extra trailing
1623 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1624 Returns a pointer to the character buffer.
1629 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1630 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1631 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1633 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1634 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1636 #define SvSetSV_and(dst,src,finally) \
1638 if ((dst) != (src)) { \
1639 sv_setsv(dst, src); \
1643 #define SvSetSV_nosteal_and(dst,src,finally) \
1645 if ((dst) != (src)) { \
1646 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL); \
1651 #define SvSetSV(dst,src) \
1652 SvSetSV_and(dst,src,/*nothing*/;)
1653 #define SvSetSV_nosteal(dst,src) \
1654 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1656 #define SvSetMagicSV(dst,src) \
1657 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1658 #define SvSetMagicSV_nosteal(dst,src) \
1659 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1662 #if !defined(SKIP_DEBUGGING)
1663 #define SvPEEK(sv) sv_peek(sv)
1665 #define SvPEEK(sv) ""
1668 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1670 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1672 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1674 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1675 #define SvGROW_mutable(sv,len) \
1676 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
1677 #define Sv_Grow sv_grow
1679 #define CLONEf_COPY_STACKS 1
1680 #define CLONEf_KEEP_PTR_TABLE 2
1681 #define CLONEf_CLONE_HOST 4
1682 #define CLONEf_JOIN_IN 8
1684 struct clone_params {
1687 PerlInterpreter *proto_perl;
1692 * c-indentation-style: bsd
1694 * indent-tabs-mode: t
1697 * ex: set ts=8 sts=4 sw=4 noet: