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 All of the following SvREFCNT_inc* macros are optimized versions of
154 SvREFCNT_inc, and can be replaced with SvREFCNT_inc.
156 =for apidoc Am|SV*|SvREFCNT_inc_NN|SV* sv
157 Same as SvREFCNT_inc, but can only be used if you know I<sv>
158 is not NULL. Since we don't have to check the NULLness, it's faster
161 =for apidoc Am|void|SvREFCNT_inc_void|SV* sv
162 Same as SvREFCNT_inc, but can only be used if you don't need the
163 return value. The macro doesn't need to return a meaningful value.
165 =for apidoc Am|void|SvREFCNT_inc_void_NN|SV* sv
166 Same as SvREFCNT_inc, but can only be used if you don't need the return
167 value, and you know that I<sv> is not NULL. The macro doesn't need
168 to return a meaningful value, or check for NULLness, so it's smaller
171 =for apidoc Am|SV*|SvREFCNT_inc_simple|SV* sv
172 Same as SvREFCNT_inc, but can only be used with simple variables, not
173 expressions or pointer dereferences. Since we don't have to store a
174 temporary value, it's faster.
176 =for apidoc Am|SV*|SvREFCNT_inc_simple_NN|SV* sv
177 Same as SvREFCNT_inc_simple, but can only be used if you know I<sv>
178 is not NULL. Since we don't have to check the NULLness, it's faster
181 =for apidoc Am|void|SvREFCNT_inc_simple_void|SV* sv
182 Same as SvREFCNT_inc_simple, but can only be used if you don't need the
183 return value. The macro doesn't need to return a meaningful value.
185 =for apidoc Am|void|SvREFCNT_inc_simple_void_NN|SV* sv
186 Same as SvREFCNT_inc, but can only be used if you don't need the return
187 value, and you know that I<sv> is not NULL. The macro doesn't need
188 to return a meaningful value, or check for NULLness, so it's smaller
191 =for apidoc Am|void|SvREFCNT_dec|SV* sv
192 Decrements the reference count of the given SV.
194 =for apidoc Am|svtype|SvTYPE|SV* sv
195 Returns the type of the SV. See C<svtype>.
197 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
198 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
199 perform the upgrade if necessary. See C<svtype>.
204 #define SvANY(sv) (sv)->sv_any
205 #define SvFLAGS(sv) (sv)->sv_flags
206 #define SvREFCNT(sv) (sv)->sv_refcnt
208 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
209 # define SvREFCNT_inc(sv) \
211 SV * const _sv = (SV*)(sv); \
216 # define SvREFCNT_inc_simple(sv) \
222 # define SvREFCNT_inc_NN(sv) \
224 SV * const _sv = (SV*)(sv); \
228 # define SvREFCNT_inc_void(sv) \
230 SV * const _sv = (SV*)(sv); \
232 (void)(SvREFCNT(_sv)++); \
235 # define SvREFCNT_inc(sv) \
236 ((PL_Sv=(SV*)(sv)) ? (++(SvREFCNT(PL_Sv)),PL_Sv) : NULL)
237 # define SvREFCNT_inc_simple(sv) \
238 ((sv) ? (SvREFCNT(sv)++,(SV*)(sv)) : NULL)
239 # define SvREFCNT_inc_NN(sv) \
240 (PL_Sv=(SV*)(sv),++(SvREFCNT(PL_Sv)),PL_Sv)
241 # define SvREFCNT_inc_void(sv) \
242 (void)((PL_Sv=(SV*)(sv)) ? ++(SvREFCNT(PL_Sv)) : 0)
245 /* These guys don't need the curly blocks */
246 #define SvREFCNT_inc_simple_void(sv) STMT_START { if (sv) SvREFCNT(sv)++; } STMT_END
247 #define SvREFCNT_inc_simple_NN(sv) (++(SvREFCNT(sv)),(SV*)(sv))
248 #define SvREFCNT_inc_void_NN(sv) (void)(++SvREFCNT((SV*)(sv)))
249 #define SvREFCNT_inc_simple_void_NN(sv) (void)(++SvREFCNT((SV*)(sv)))
251 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
252 # define SvREFCNT_dec(sv) \
254 SV * const _sv = (SV*)(sv); \
256 if (SvREFCNT(_sv)) { \
257 if (--(SvREFCNT(_sv)) == 0) \
258 Perl_sv_free2(aTHX_ _sv); \
265 #define SvREFCNT_dec(sv) sv_free((SV*)(sv))
268 #define SVTYPEMASK 0xff
269 #define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK)
271 /* Sadly there are some parts of the core that have pointers to already-freed
272 SV heads, and rely on being able to tell that they are now free. So mark
273 them all by using a consistent macro. */
274 #define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
276 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= (mt) || (sv_upgrade(sv, mt), 1))
278 #define SVf_IOK 0x00000100 /* has valid public integer value */
279 #define SVf_NOK 0x00000200 /* has valid public numeric value */
280 #define SVf_POK 0x00000400 /* has valid public pointer value */
281 #define SVf_ROK 0x00000800 /* has a valid reference pointer */
283 #define SVp_IOK 0x00001000 /* has valid non-public integer value */
284 #define SVp_NOK 0x00002000 /* has valid non-public numeric value */
285 #define SVp_POK 0x00004000 /* has valid non-public pointer value */
286 #define SVp_SCREAM 0x00008000 /* has been studied? */
287 #define SVphv_CLONEABLE 0x00008000 /* PVHV (stashes) clone its objects */
289 #define SVs_PADSTALE 0x00010000 /* lexical has gone out of scope */
290 #define SVpad_STATE 0x00010000 /* pad name is a "state" var */
291 #define SVs_PADTMP 0x00020000 /* in use as tmp */
292 #define SVpad_TYPED 0x00020000 /* pad name is a Typed Lexical */
293 #define SVs_PADMY 0x00040000 /* in use a "my" variable */
294 #define SVpad_OUR 0x00040000 /* pad name is "our" instead of "my" */
295 #define SVs_TEMP 0x00080000 /* string is stealable? */
296 #define SVs_OBJECT 0x00100000 /* is "blessed" */
297 #define SVs_GMG 0x00200000 /* has magical get method */
298 #define SVs_SMG 0x00400000 /* has magical set method */
299 #define SVs_RMG 0x00800000 /* has random magical methods */
301 #define SVf_FAKE 0x01000000 /* 0: glob or lexical is just a copy
302 1: SV head arena wasn't malloc()ed
303 2: in conjunction with SVf_READONLY
304 marks a shared hash key scalar
305 (SvLEN == 0) or a copy on write
306 string (SvLEN != 0) [SvIsCOW(sv)]
307 3: For PVCV, whether CvUNIQUE(cv)
308 refers to an eval or once only
309 [CvEVAL(cv), CvSPECIAL(cv)]
310 4: Whether the regexp pointer is in
311 fact an offset [SvREPADTMP(sv)]
312 5: On a pad name SV, that slot in the
313 frame AV is a REFCNT'ed reference
314 to a lexical from "outside". */
315 #define SVphv_REHASH SVf_FAKE /* 6: On a PVHV, hash values are being
317 #define SVf_OOK 0x02000000 /* has valid offset value
318 For a PVHV this means that a
319 hv_aux struct is present after the
321 #define SVf_BREAK 0x04000000 /* refcnt is artificially low - used
322 * by SV's in final arena cleanup */
323 #define SVf_READONLY 0x08000000 /* may not be modified */
328 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
330 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
331 SVp_IOK|SVp_NOK|SVp_POK|SVp_SCREAM)
333 #define PRIVSHIFT 4 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
335 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
336 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded */
337 /* Ensure this value does not clash with the GV_ADD* flags in gv.h */
339 /* Some private flags. */
342 #define SVphv_SHAREKEYS 0x20000000 /* PVHV
343 keys live on shared string table */
344 /* PVNV, PVMG, PVGV, presumably only inside pads */
345 #define SVpad_NAME 0x40000000 /* This SV is a name in the PAD, so
346 SVpad_TYPED, SVpad_OUR and
349 #define SVpav_REAL 0x40000000 /* free old entries */
351 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
353 #define SVpbm_TAIL 0x40000000
355 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
357 /* IV, PVIV, PVNV, PVMG, PVGV and (I assume) PVLV */
358 /* Presumably IVs aren't stored in pads */
359 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
361 #define SVpav_REIFY 0x80000000 /* can become real */
363 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
365 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
367 #define SVpbm_VALID 0x80000000
368 /* RV upwards. However, SVf_ROK and SVp_IOK are exclusive */
369 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
374 NV xnv_nv; /* numeric value, if any */
377 STRLEN xpv_cur; /* length of svu_pv as a C string */
378 STRLEN xpv_len; /* allocated size */
382 typedef struct xpv xpv_allocated;
385 STRLEN xpv_cur; /* length of svu_pv as a C string */
386 STRLEN xpv_len; /* allocated size */
392 NV xnv_nv; /* numeric value, if any */
395 STRLEN xpv_cur; /* length of svu_pv as a C string */
396 STRLEN xpv_len; /* allocated size */
398 IV xivu_iv; /* integer value or pv offset */
407 typedef struct xpviv xpviv_allocated;
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 */
422 #define xiv_iv xiv_u.xivu_iv
426 NV xnv_nv; /* numeric value, if any */
429 STRLEN xpv_cur; /* length of svu_pv as a C string */
430 STRLEN xpv_len; /* allocated size */
433 UV xuvu_uv; /* unsigned value or pv offset */
439 #define xuv_uv xuv_u.xuvu_uv
443 NV xnv_nv; /* numeric value, if any */
446 STRLEN xpv_cur; /* length of svu_pv as a C string */
447 STRLEN xpv_len; /* allocated size */
449 IV xivu_iv; /* integer value or pv offset */
457 /* These structure must match the beginning of struct xpvhv in hv.h. */
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 */
473 MAGIC* xmg_magic; /* linked list of magicalness */
474 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
476 HV* xmg_stash; /* class package */
481 NV xnv_nv; /* numeric value, if any */
484 STRLEN xpv_cur; /* length of svu_pv as a C string */
485 STRLEN xpv_len; /* allocated size */
487 IV xivu_iv; /* integer value or pv offset */
491 HEK * xivu_namehek; /* GvNAME */
494 MAGIC* xmg_magic; /* linked list of magicalness */
495 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
497 HV* xmg_stash; /* class package */
502 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
503 * y=alem/helem/iter t=tie T=tied HE */
509 HV * xgv_stash; /* The stash of this GV */
511 STRLEN xpv_cur; /* xgv_flags */
512 STRLEN xpv_len; /* 0 */
518 HEK * xivu_namehek; /* GvNAME */
521 MAGIC* xmg_magic; /* linked list of magicalness */
522 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
524 HV* xmg_stash; /* class package */
530 NV xnv_nv; /* numeric value, if any */
533 STRLEN xpv_cur; /* length of svu_pv as a C string */
534 STRLEN xpv_len; /* allocated size */
536 IV xivu_iv; /* integer value or pv offset */
543 MAGIC* xmg_magic; /* linked list of magicalness */
544 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
546 HV* xmg_stash; /* class package */
548 I32 xbm_useful; /* is this constant pattern being useful? */
549 U16 xbm_previous; /* how many characters in string before rare? */
550 U8 xbm_rare; /* rarest character in string */
553 /* This structure must match XPVCV in cv.h */
555 typedef U16 cv_flags_t;
559 NV xnv_nv; /* numeric value, if any */
562 STRLEN xpv_cur; /* length of svu_pv as a C string */
563 STRLEN xpv_len; /* allocated size */
565 IV xivu_iv; /* PVFMs use the pv offset */
572 MAGIC* xmg_magic; /* linked list of magicalness */
573 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
575 HV* xmg_stash; /* class package */
584 void (*xcv_xsub) (pTHX_ CV*);
590 U32 xcv_outside_seq; /* the COP sequence (at the point of our
591 * compilation) in the lexically enclosing
593 cv_flags_t xcv_flags;
598 STRLEN xpv_cur; /* length of svu_pv as a C string */
599 STRLEN xpv_len; /* allocated size */
601 IV xivu_iv; /* PVFMs use the pv offset */
608 MAGIC* xmg_magic; /* linked list of magicalness */
609 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
611 HV* xmg_stash; /* class package */
620 void (*xcv_xsub) (pTHX_ CV*);
626 U32 xcv_outside_seq; /* the COP sequence (at the point of our
627 * compilation) in the lexically enclosing
629 cv_flags_t xcv_flags;
635 NV xnv_nv; /* numeric value, if any */
638 STRLEN xpv_cur; /* length of svu_pv as a C string */
639 STRLEN xpv_len; /* allocated size */
641 IV xivu_iv; /* integer value or pv offset */
648 MAGIC* xmg_magic; /* linked list of magicalness */
649 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
651 HV* xmg_stash; /* class package */
653 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
654 PerlIO * xio_ofp; /* but sockets need separate streams */
655 /* Cray addresses everything by word boundaries (64 bits) and
656 * code and data pointers cannot be mixed (which is exactly what
657 * Perl_filter_add() tries to do with the dirp), hence the following
658 * union trick (as suggested by Gurusamy Sarathy).
659 * For further information see Geir Johansen's problem report titled
660 [ID 20000612.002] Perl problem on Cray system
661 * The any pointer (known as IoANY()) will also be a good place
662 * to hang any IO disciplines to.
665 DIR * xiou_dirp; /* for opendir, readdir, etc */
666 void * xiou_any; /* for alignment */
668 IV xio_lines; /* $. */
669 IV xio_page; /* $% */
670 IV xio_page_len; /* $= */
671 IV xio_lines_left; /* $- */
672 char * xio_top_name; /* $^ */
673 GV * xio_top_gv; /* $^ */
674 char * xio_fmt_name; /* $~ */
675 GV * xio_fmt_gv; /* $~ */
676 char * xio_bottom_name;/* $^B */
677 GV * xio_bottom_gv; /* $^B */
678 short xio_subprocess; /* -| or |- */
682 #define xio_dirp xio_dirpu.xiou_dirp
683 #define xio_any xio_dirpu.xiou_any
685 #define IOf_ARGV 1 /* this fp iterates over ARGV */
686 #define IOf_START 2 /* check for null ARGV and substitute '-' */
687 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
688 #define IOf_DIDTOP 8 /* just did top of form */
689 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
690 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
691 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
693 /* The following macros define implementation-independent predicates on SVs. */
696 =for apidoc Am|bool|SvNIOK|SV* sv
697 Returns a boolean indicating whether the SV contains a number, integer or
700 =for apidoc Am|bool|SvNIOKp|SV* sv
701 Returns a boolean indicating whether the SV contains a number, integer or
702 double. Checks the B<private> setting. Use C<SvNIOK>.
704 =for apidoc Am|void|SvNIOK_off|SV* sv
705 Unsets the NV/IV status of an SV.
707 =for apidoc Am|bool|SvOK|SV* sv
708 Returns a boolean indicating whether the value is an SV. It also tells
709 whether the value is defined or not.
711 =for apidoc Am|bool|SvIOKp|SV* sv
712 Returns a boolean indicating whether the SV contains an integer. Checks
713 the B<private> setting. Use C<SvIOK>.
715 =for apidoc Am|bool|SvNOKp|SV* sv
716 Returns a boolean indicating whether the SV contains a double. Checks the
717 B<private> setting. Use C<SvNOK>.
719 =for apidoc Am|bool|SvPOKp|SV* sv
720 Returns a boolean indicating whether the SV contains a character string.
721 Checks the B<private> setting. Use C<SvPOK>.
723 =for apidoc Am|bool|SvIOK|SV* sv
724 Returns a boolean indicating whether the SV contains an integer.
726 =for apidoc Am|void|SvIOK_on|SV* sv
727 Tells an SV that it is an integer.
729 =for apidoc Am|void|SvIOK_off|SV* sv
730 Unsets the IV status of an SV.
732 =for apidoc Am|void|SvIOK_only|SV* sv
733 Tells an SV that it is an integer and disables all other OK bits.
735 =for apidoc Am|void|SvIOK_only_UV|SV* sv
736 Tells and SV that it is an unsigned integer and disables all other OK bits.
738 =for apidoc Am|bool|SvIOK_UV|SV* sv
739 Returns a boolean indicating whether the SV contains an unsigned integer.
741 =for apidoc Am|void|SvUOK|SV* sv
742 Returns a boolean indicating whether the SV contains an unsigned integer.
744 =for apidoc Am|bool|SvIOK_notUV|SV* sv
745 Returns a boolean indicating whether the SV contains a signed integer.
747 =for apidoc Am|bool|SvNOK|SV* sv
748 Returns a boolean indicating whether the SV contains a double.
750 =for apidoc Am|void|SvNOK_on|SV* sv
751 Tells an SV that it is a double.
753 =for apidoc Am|void|SvNOK_off|SV* sv
754 Unsets the NV status of an SV.
756 =for apidoc Am|void|SvNOK_only|SV* sv
757 Tells an SV that it is a double and disables all other OK bits.
759 =for apidoc Am|bool|SvPOK|SV* sv
760 Returns a boolean indicating whether the SV contains a character
763 =for apidoc Am|void|SvPOK_on|SV* sv
764 Tells an SV that it is a string.
766 =for apidoc Am|void|SvPOK_off|SV* sv
767 Unsets the PV status of an SV.
769 =for apidoc Am|void|SvPOK_only|SV* sv
770 Tells an SV that it is a string and disables all other OK bits.
771 Will also turn off the UTF-8 status.
773 =for apidoc Am|bool|SvVOK|SV* sv
774 Returns a boolean indicating whether the SV contains a v-string.
776 =for apidoc Am|bool|SvOOK|SV* sv
777 Returns a boolean indicating whether the SvIVX is a valid offset value for
778 the SvPVX. This hack is used internally to speed up removal of characters
779 from the beginning of a SvPV. When SvOOK is true, then the start of the
780 allocated string buffer is really (SvPVX - SvIVX).
782 =for apidoc Am|bool|SvROK|SV* sv
783 Tests if the SV is an RV.
785 =for apidoc Am|void|SvROK_on|SV* sv
786 Tells an SV that it is an RV.
788 =for apidoc Am|void|SvROK_off|SV* sv
789 Unsets the RV status of an SV.
791 =for apidoc Am|SV*|SvRV|SV* sv
792 Dereferences an RV to return the SV.
794 =for apidoc Am|IV|SvIVX|SV* sv
795 Returns the raw value in the SV's IV slot, without checks or conversions.
796 Only use when you are sure SvIOK is true. See also C<SvIV()>.
798 =for apidoc Am|UV|SvUVX|SV* sv
799 Returns the raw value in the SV's UV slot, without checks or conversions.
800 Only use when you are sure SvIOK is true. See also C<SvUV()>.
802 =for apidoc Am|NV|SvNVX|SV* sv
803 Returns the raw value in the SV's NV slot, without checks or conversions.
804 Only use when you are sure SvNOK is true. See also C<SvNV()>.
806 =for apidoc Am|char*|SvPVX|SV* sv
807 Returns a pointer to the physical string in the SV. The SV must contain a
810 =for apidoc Am|STRLEN|SvCUR|SV* sv
811 Returns the length of the string which is in the SV. See C<SvLEN>.
813 =for apidoc Am|STRLEN|SvLEN|SV* sv
814 Returns the size of the string buffer in the SV, not including any part
815 attributable to C<SvOOK>. See C<SvCUR>.
817 =for apidoc Am|char*|SvEND|SV* sv
818 Returns a pointer to the last character in the string which is in the SV.
819 See C<SvCUR>. Access the character as *(SvEND(sv)).
821 =for apidoc Am|HV*|SvSTASH|SV* sv
822 Returns the stash of the SV.
824 =for apidoc Am|void|SvIV_set|SV* sv|IV val
825 Set the value of the IV pointer in sv to val. It is possible to perform
826 the same function of this macro with an lvalue assignment to C<SvIVX>.
827 With future Perls, however, it will be more efficient to use
828 C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
830 =for apidoc Am|void|SvNV_set|SV* sv|NV val
831 Set the value of the NV pointer in sv to val. See C<SvIV_set>.
833 =for apidoc Am|void|SvPV_set|SV* sv|char* val
834 Set the value of the PV pointer in sv to val. See C<SvIV_set>.
836 =for apidoc Am|void|SvUV_set|SV* sv|UV val
837 Set the value of the UV pointer in sv to val. See C<SvIV_set>.
839 =for apidoc Am|void|SvRV_set|SV* sv|SV* val
840 Set the value of the RV pointer in sv to val. See C<SvIV_set>.
842 =for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
843 Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>.
845 =for apidoc Am|void|SvSTASH_set|SV* sv|HV* val
846 Set the value of the STASH pointer in sv to val. See C<SvIV_set>.
848 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
849 Set the current length of the string which is in the SV. See C<SvCUR>
852 =for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
853 Set the actual length of the string which is in the SV. See C<SvIV_set>.
858 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
859 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
860 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
861 SVp_IOK|SVp_NOK|SVf_IVisUV))
863 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
864 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
865 #define assert_not_glob(sv) ({assert(!isGV_with_GP(sv));}),
867 #define assert_not_ROK(sv)
868 #define assert_not_glob(sv)
871 #define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
872 #define SvOK_off(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
873 SvFLAGS(sv) &= ~(SVf_OK| \
874 SVf_IVisUV|SVf_UTF8), \
876 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
877 SvFLAGS(sv) &= ~(SVf_OK| \
881 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
882 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
883 #define SvIOKp_on(sv) (assert_not_glob(sv) SvRELEASE_IVX(sv), \
884 SvFLAGS(sv) |= SVp_IOK)
885 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
886 #define SvNOKp_on(sv) (assert_not_glob(sv) SvFLAGS(sv) |= SVp_NOK)
887 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
888 #define SvPOKp_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
889 SvFLAGS(sv) |= SVp_POK)
891 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
892 #define SvIOK_on(sv) (assert_not_glob(sv) SvRELEASE_IVX(sv), \
893 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
894 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
895 #define SvIOK_only(sv) (SvOK_off(sv), \
896 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
897 #define SvIOK_only_UV(sv) (assert_not_glob(sv) SvOK_off_exc_UV(sv), \
898 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
900 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
901 == (SVf_IOK|SVf_IVisUV))
902 #define SvUOK(sv) SvIOK_UV(sv)
903 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
906 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
907 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
908 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
910 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
911 #define SvNOK_on(sv) (assert_not_glob(sv) \
912 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
913 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
914 #define SvNOK_only(sv) (SvOK_off(sv), \
915 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
918 =for apidoc Am|bool|SvUTF8|SV* sv
919 Returns a boolean indicating whether the SV contains UTF-8 encoded data.
921 =for apidoc Am|void|SvUTF8_on|SV *sv
922 Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
923 Do not use frivolously.
925 =for apidoc Am|void|SvUTF8_off|SV *sv
926 Unsets the UTF-8 status of an SV.
928 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
929 Tells an SV that it is a string and disables all other OK bits,
930 and leaves the UTF-8 status as it was.
935 /* Ensure the return value of this macro does not clash with the GV_ADD* flags
937 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
938 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
939 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
941 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
942 #define SvPOK_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
943 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
944 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
945 #define SvPOK_only(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
946 SvFLAGS(sv) &= ~(SVf_OK| \
947 SVf_IVisUV|SVf_UTF8), \
948 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
949 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
950 SvFLAGS(sv) &= ~(SVf_OK| \
952 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
954 #define SvVOK(sv) (SvMAGICAL(sv) \
955 && mg_find(sv,PERL_MAGIC_vstring))
956 /* returns the vstring magic, if any */
957 #define SvVSTRING_mg(sv) (SvMAGICAL(sv) \
958 ? mg_find(sv,PERL_MAGIC_vstring) : NULL)
960 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
961 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
962 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
964 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
965 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
966 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
968 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
969 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
970 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK))
972 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
973 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
974 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
976 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
977 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
978 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
980 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
981 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
982 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
984 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
985 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
986 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
988 #define SvAMAGIC(sv) (SvROK(sv) && (SvFLAGS(SvRV(sv)) & SVf_AMAGIC))
989 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
990 # define SvAMAGIC_on(sv) ({ SV * const kloink = sv; \
991 assert(SvROK(kloink)); \
992 SvFLAGS(SvRV(kloink)) |= SVf_AMAGIC; \
994 # define SvAMAGIC_off(sv) ({ SV * const kloink = sv; \
996 SvFLAGS(SvRV(kloink)) &= ~SVf_AMAGIC;\
999 # define SvAMAGIC_on(sv) (SvFLAGS(SvRV(sv)) |= SVf_AMAGIC)
1000 # define SvAMAGIC_off(sv) \
1001 (SvROK(sv) && (SvFLAGS(SvRV(sv)) &= ~SVf_AMAGIC))
1005 =for apidoc Am|char*|SvGAMAGIC|SV* sv
1007 Returns true if the SV has get magic or overloading. If either is true then
1008 the scalar is active data, and has the potential to return a new value every
1009 time it is accessed. Hence you must be careful to only read it once per user
1010 logical operation and work with that returned value. If neither is true then
1011 the scalar's value cannot change unless written to.
1016 #define SvGAMAGIC(sv) (SvGMAGICAL(sv) || SvAMAGIC(sv))
1018 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
1020 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
1021 == (SVf_ROK|SVprv_WEAKREF))
1022 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
1023 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
1025 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
1027 #define SvPADSTALE(sv) (SvFLAGS(sv) & SVs_PADSTALE)
1028 #define SvPADSTALE_on(sv) (SvFLAGS(sv) |= SVs_PADSTALE)
1029 #define SvPADSTALE_off(sv) (SvFLAGS(sv) &= ~SVs_PADSTALE)
1031 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
1032 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
1033 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
1035 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
1036 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY)
1038 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
1039 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
1040 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
1042 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
1043 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
1044 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
1046 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
1047 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
1048 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
1050 #define SvSCREAM(sv) ((SvFLAGS(sv) & (SVp_SCREAM|SVp_POK)) == (SVp_SCREAM|SVp_POK))
1051 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
1052 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
1054 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
1055 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
1056 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
1058 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
1059 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
1060 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
1062 #define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL)
1063 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
1064 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
1066 #define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
1067 #define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
1068 #define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
1071 /* The following uses the FAKE flag to show that a regex pointer is infact
1072 its own offset in the regexpad for ithreads */
1073 #define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
1074 #define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
1075 #define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
1078 #define SvPAD_TYPED(sv) \
1079 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_TYPED)) == (SVpad_NAME|SVpad_TYPED))
1080 #define SvPAD_TYPED_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_TYPED)
1082 #define SvPAD_OUR(sv) \
1083 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_OUR)) == (SVpad_NAME|SVpad_OUR))
1084 #define SvPAD_OUR_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_OUR)
1086 #define SvPAD_STATE(sv) \
1087 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_STATE)) == (SVpad_NAME|SVpad_STATE))
1088 #define SvPAD_STATE_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_STATE)
1090 #define OURSTASH(sv) \
1091 (SvPAD_OUR(sv) ? ((XPVMG*) SvANY(sv))->xmg_u.xmg_ourstash : NULL)
1092 #define OURSTASH_set(sv, st) \
1094 assert(SvTYPE(sv) == SVt_PVMG); \
1095 ((XPVMG*) SvANY(sv))->xmg_u.xmg_ourstash = st; \
1098 #ifdef PERL_DEBUG_COW
1099 #define SvRV(sv) (0 + (sv)->sv_u.svu_rv)
1101 #define SvRV(sv) ((sv)->sv_u.svu_rv)
1103 #define SvRVx(sv) SvRV(sv)
1105 #ifdef PERL_DEBUG_COW
1106 /* Need -0.0 for SvNVX to preserve IEEE FP "negative zero" because
1107 +0.0 + -0.0 => +0.0 but -0.0 + -0.0 => -0.0 */
1108 # define SvIVX(sv) (0 + ((XPVIV*) SvANY(sv))->xiv_iv)
1109 # define SvUVX(sv) (0 + ((XPVUV*) SvANY(sv))->xuv_uv)
1110 # define SvNVX(sv) (-0.0 + ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv)
1111 /* Don't test the core XS code yet. */
1112 # if defined (PERL_CORE) && PERL_DEBUG_COW > 1
1113 # define SvPVX(sv) (0 + (assert(!SvREADONLY(sv)), (sv)->sv_u.svu_pv))
1115 # define SvPVX(sv) SvPVX_mutable(sv)
1117 # define SvCUR(sv) (0 + ((XPV*) SvANY(sv))->xpv_cur)
1118 # define SvLEN(sv) (0 + ((XPV*) SvANY(sv))->xpv_len)
1119 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1122 # define SvMAGIC(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_u.xmg_magic))
1123 # define SvSTASH(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
1125 # define SvMAGIC(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic)
1126 # define SvSTASH(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_stash)
1129 # define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
1130 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1132 # if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1133 /* These get expanded inside other macros that already use a variable _sv */
1134 # define SvPVX(sv) \
1135 (*({ SV *const _svi = (SV *) sv; \
1136 assert(SvTYPE(_svi) >= SVt_PV); \
1137 assert(SvTYPE(_svi) != SVt_PVAV); \
1138 assert(SvTYPE(_svi) != SVt_PVHV); \
1139 assert(!isGV_with_GP(_svi)); \
1140 &((_svi)->sv_u.svu_pv); \
1142 # define SvCUR(sv) \
1143 (*({ SV *const _svi = (SV *) sv; \
1144 assert(SvTYPE(_svi) >= SVt_PV); \
1145 assert(SvTYPE(_svi) != SVt_PVAV); \
1146 assert(SvTYPE(_svi) != SVt_PVHV); \
1147 assert(!isGV_with_GP(_svi)); \
1148 &(((XPV*) SvANY(_svi))->xpv_cur); \
1150 # define SvIVX(sv) \
1151 (*({ SV *const _svi = (SV *) sv; \
1152 assert(SvTYPE(_svi) == SVt_IV || SvTYPE(_svi) >= SVt_PVIV); \
1153 assert(SvTYPE(_svi) != SVt_PVAV); \
1154 assert(SvTYPE(_svi) != SVt_PVHV); \
1155 assert(SvTYPE(_svi) != SVt_PVCV); \
1156 assert(!isGV_with_GP(_svi)); \
1157 &(((XPVIV*) SvANY(_svi))->xiv_iv); \
1159 # define SvUVX(sv) \
1160 (*({ SV *const _svi = (SV *) sv; \
1161 assert(SvTYPE(_svi) == SVt_IV || SvTYPE(_svi) >= SVt_PVIV); \
1162 assert(SvTYPE(_svi) != SVt_PVAV); \
1163 assert(SvTYPE(_svi) != SVt_PVHV); \
1164 assert(SvTYPE(_svi) != SVt_PVCV); \
1165 assert(!isGV_with_GP(_svi)); \
1166 &(((XPVUV*) SvANY(_svi))->xuv_uv); \
1168 # define SvNVX(sv) \
1169 (*({ SV *const _svi = (SV *) sv; \
1170 assert(SvTYPE(_svi) == SVt_NV || SvTYPE(_svi) >= SVt_PVNV); \
1171 assert(SvTYPE(_svi) != SVt_PVAV); \
1172 assert(SvTYPE(_svi) != SVt_PVHV); \
1173 assert(SvTYPE(_svi) != SVt_PVFM); \
1174 assert(!isGV_with_GP(_svi)); \
1175 &(((XPVNV*) SvANY(_svi))->xnv_u.xnv_nv); \
1177 # define SvMAGIC(sv) \
1178 (*({ SV *const _svi = (SV *) sv; \
1179 assert(SvTYPE(_svi) >= SVt_PVMG); \
1180 if(SvTYPE(_svi) == SVt_PVMG) \
1181 assert(!SvPAD_OUR(_svi)); \
1182 &(((XPVMG*) SvANY(_svi))->xmg_u.xmg_magic); \
1184 # define SvSTASH(sv) \
1185 (*({ SV *const _svi = (SV *) sv; \
1186 assert(SvTYPE(_svi) >= SVt_PVMG); \
1187 &(((XPVMG*) SvANY(_svi))->xmg_stash); \
1190 # define SvPVX(sv) ((sv)->sv_u.svu_pv)
1191 # define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
1192 # define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
1193 # define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
1194 # define SvNVX(sv) ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv
1195 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic
1196 # define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
1201 /* Given that these two are new, there can't be any existing code using them
1203 # define SvPVX_mutable(sv) (0 + (sv)->sv_u.svu_pv)
1204 # define SvPVX_const(sv) ((const char*)(0 + (sv)->sv_u.svu_pv))
1206 /* Except for the poison code, which uses & to scribble over the pointer after
1207 free() is called. */
1208 # define SvPVX_mutable(sv) ((sv)->sv_u.svu_pv)
1209 # define SvPVX_const(sv) ((const char*)((sv)->sv_u.svu_pv))
1212 #define SvIVXx(sv) SvIVX(sv)
1213 #define SvUVXx(sv) SvUVX(sv)
1214 #define SvNVXx(sv) SvNVX(sv)
1215 #define SvPVXx(sv) SvPVX(sv)
1216 #define SvLENx(sv) SvLEN(sv)
1217 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
1220 /* Ask a scalar nicely to try to become an IV, if possible.
1221 Not guaranteed to stay returning void */
1222 /* Macro won't actually call sv_2iv if already IOK */
1223 #define SvIV_please(sv) \
1224 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
1225 (void) SvIV(sv); } STMT_END
1226 #define SvIV_set(sv, val) \
1227 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1228 assert(!isGV_with_GP(sv)); \
1229 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
1230 #define SvNV_set(sv, val) \
1231 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
1232 assert(SvTYPE(sv) != SVt_PVAV); assert(SvTYPE(sv) != SVt_PVHV); \
1233 assert(!isGV_with_GP(sv)); \
1234 (((XPVNV*)SvANY(sv))->xnv_u.xnv_nv = (val)); } STMT_END
1235 #define SvPV_set(sv, val) \
1236 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1237 assert(!isGV_with_GP(sv)); \
1238 ((sv)->sv_u.svu_pv = (val)); } STMT_END
1239 #define SvUV_set(sv, val) \
1240 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1241 assert(!isGV_with_GP(sv)); \
1242 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
1243 #define SvRV_set(sv, val) \
1244 STMT_START { assert(SvTYPE(sv) >= SVt_RV); \
1245 assert(!isGV_with_GP(sv)); \
1246 ((sv)->sv_u.svu_rv = (val)); } STMT_END
1247 #define SvMAGIC_set(sv, val) \
1248 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1249 (((XPVMG*)SvANY(sv))->xmg_u.xmg_magic = (val)); } STMT_END
1250 #define SvSTASH_set(sv, val) \
1251 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1252 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
1253 #define SvCUR_set(sv, val) \
1254 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1255 assert(!isGV_with_GP(sv)); \
1256 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
1257 #define SvLEN_set(sv, val) \
1258 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1259 assert(!isGV_with_GP(sv)); \
1260 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
1261 #define SvEND_set(sv, val) \
1262 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1263 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
1265 #define SvPV_renew(sv,n) \
1266 STMT_START { SvLEN_set(sv, n); \
1267 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
1268 (char*)saferealloc((Malloc_t)SvPVX(sv), \
1269 (MEM_SIZE)((n))))); \
1272 #define SvPV_shrink_to_cur(sv) STMT_START { \
1273 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
1274 SvPV_renew(sv, _lEnGtH); \
1277 #define SvPV_free(sv) \
1279 assert(SvTYPE(sv) >= SVt_PV); \
1282 SvPV_set(sv, SvPVX_mutable(sv) - SvIVX(sv)); \
1283 SvFLAGS(sv) &= ~SVf_OOK; \
1285 Safefree(SvPVX(sv)); \
1289 #define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
1290 #define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
1291 #define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
1293 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
1295 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
1296 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
1297 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
1298 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
1300 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
1301 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
1302 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
1303 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
1304 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
1305 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
1306 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
1307 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
1308 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
1309 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
1310 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
1311 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
1312 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
1313 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
1314 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
1315 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1316 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1318 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
1319 #define IoTYPE_RDONLY '<'
1320 #define IoTYPE_WRONLY '>'
1321 #define IoTYPE_RDWR '+'
1322 #define IoTYPE_APPEND 'a'
1323 #define IoTYPE_PIPE '|'
1324 #define IoTYPE_STD '-' /* stdin or stdout */
1325 #define IoTYPE_SOCKET 's'
1326 #define IoTYPE_CLOSED ' '
1327 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1328 #define IoTYPE_NUMERIC '#' /* fdopen */
1331 =for apidoc Am|bool|SvTAINTED|SV* sv
1332 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
1335 =for apidoc Am|void|SvTAINTED_on|SV* sv
1336 Marks an SV as tainted if tainting is enabled.
1338 =for apidoc Am|void|SvTAINTED_off|SV* sv
1339 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1340 some of Perl's fundamental security features. XS module authors should not
1341 use this function unless they fully understand all the implications of
1342 unconditionally untainting the value. Untainting should be done in the
1343 standard perl fashion, via a carefully crafted regexp, rather than directly
1344 untainting variables.
1346 =for apidoc Am|void|SvTAINT|SV* sv
1347 Taints an SV if tainting is enabled.
1352 #define sv_taint(sv) sv_magic((sv), NULL, PERL_MAGIC_taint, NULL, 0)
1354 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1355 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
1356 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
1358 #define SvTAINT(sv) \
1360 if (PL_tainting) { \
1367 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
1368 Like C<SvPV> but will force the SV into containing just a string
1369 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1372 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
1373 Like C<SvPV> but will force the SV into containing just a string
1374 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1375 directly. Doesn't process magic.
1377 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
1378 Returns a pointer to the string in the SV, or a stringified form of
1379 the SV if the SV does not contain a string. The SV may cache the
1380 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
1381 C<SvPVx> for a version which guarantees to evaluate sv only once.
1383 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
1384 A version of C<SvPV> which guarantees to evaluate sv only once.
1386 =for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1387 Like C<SvPV> but doesn't process magic.
1389 =for apidoc Am|char*|SvPV_nolen|SV* sv
1390 Returns a pointer to the string in the SV, or a stringified form of
1391 the SV if the SV does not contain a string. The SV may cache the
1392 stringified form becoming C<SvPOK>. Handles 'get' magic.
1394 =for apidoc Am|IV|SvIV|SV* sv
1395 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
1396 version which guarantees to evaluate sv only once.
1398 =for apidoc Am|IV|SvIV_nomg|SV* sv
1399 Like C<SvIV> but doesn't process magic.
1401 =for apidoc Am|IV|SvIVx|SV* sv
1402 Coerces the given SV to an integer and returns it. Guarantees to evaluate
1403 sv only once. Use the more efficient C<SvIV> otherwise.
1405 =for apidoc Am|NV|SvNV|SV* sv
1406 Coerce the given SV to a double and return it. See C<SvNVx> for a version
1407 which guarantees to evaluate sv only once.
1409 =for apidoc Am|NV|SvNVx|SV* sv
1410 Coerces the given SV to a double and returns it. Guarantees to evaluate
1411 sv only once. Use the more efficient C<SvNV> otherwise.
1413 =for apidoc Am|UV|SvUV|SV* sv
1414 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
1415 for a version which guarantees to evaluate sv only once.
1417 =for apidoc Am|UV|SvUV_nomg|SV* sv
1418 Like C<SvUV> but doesn't process magic.
1420 =for apidoc Am|UV|SvUVx|SV* sv
1421 Coerces the given SV to an unsigned integer and returns it. Guarantees to
1422 evaluate sv only once. Use the more efficient C<SvUV> otherwise.
1424 =for apidoc Am|bool|SvTRUE|SV* sv
1425 Returns a boolean indicating whether Perl would evaluate the SV as true or
1426 false, defined or undefined. Does not handle 'get' magic.
1428 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
1429 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1431 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
1432 Like C<SvPV>, but converts sv to utf8 first if necessary.
1434 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1435 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
1437 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1438 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1440 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1441 Like C<SvPV>, but converts sv to byte representation first if necessary.
1443 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1444 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1446 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1447 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1448 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1451 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1452 Like C<SvPV>, but converts sv to utf8 first if necessary.
1453 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1456 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1457 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1458 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1461 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1462 Like C<SvPV>, but converts sv to byte representation first if necessary.
1463 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1466 =for apidoc Am|bool|SvIsCOW|SV* sv
1467 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1468 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1471 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1472 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1475 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1476 Like C<sv_catpvn> but doesn't process magic.
1478 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1479 Like C<sv_setsv> but doesn't process magic.
1481 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1482 Like C<sv_catsv> but doesn't process magic.
1487 /* Let us hope that bitmaps for UV and IV are the same */
1488 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1489 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1490 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1492 #define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1493 #define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1497 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1498 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1499 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1501 #define SvPV_flags(sv, lp, flags) \
1502 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1503 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1504 #define SvPV_flags_const(sv, lp, flags) \
1505 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1506 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1507 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1508 #define SvPV_flags_const_nolen(sv, flags) \
1509 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1510 ? SvPVX_const(sv) : \
1511 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN))
1512 #define SvPV_flags_mutable(sv, lp, flags) \
1513 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1514 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1515 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1517 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1518 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1519 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1521 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1522 #define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
1524 #define SvPV_force_flags(sv, lp, flags) \
1525 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1526 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1527 #define SvPV_force_flags_nolen(sv, flags) \
1528 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1529 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1530 #define SvPV_force_flags_mutable(sv, lp, flags) \
1531 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1532 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1533 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1535 #define SvPV_nolen(sv) \
1536 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1537 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1539 #define SvPV_nolen_const(sv) \
1540 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1541 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1543 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1544 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1545 #define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
1549 #define SvPVutf8(sv, lp) \
1550 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1551 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1553 #define SvPVutf8_force(sv, lp) \
1554 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1555 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1558 #define SvPVutf8_nolen(sv) \
1559 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1560 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1564 #define SvPVbyte(sv, lp) \
1565 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1566 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1568 #define SvPVbyte_force(sv, lp) \
1569 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1570 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1572 #define SvPVbyte_nolen(sv) \
1573 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1574 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1578 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1579 * var to evaluate the arg once; failing that, use a global if possible;
1580 * failing that, call a function to do the work
1583 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1584 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1585 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1587 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1589 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1590 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1591 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1592 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1593 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1594 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1595 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1596 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1597 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1598 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1599 # define SvTRUE(sv) ( \
1603 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1605 (nxpv->xpv_cur > 1 || \
1606 (nxpv->xpv_cur && *(sv)->sv_u.svu_pv != '0')); }) \
1613 ? SvNVX(sv) != 0.0 \
1615 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1617 #else /* __GNUC__ */
1619 /* These inlined macros use globals, which will require a thread
1620 * declaration in user code, so we avoid them under threads */
1622 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1623 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1624 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1625 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1626 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1627 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1628 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1629 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1630 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1631 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1632 # define SvTRUE(sv) ( \
1636 ? ((PL_Xpv = (XPV*)SvANY(PL_Sv = (sv))) && \
1637 (PL_Xpv->xpv_cur > 1 || \
1638 (PL_Xpv->xpv_cur && *PL_Sv->sv_u.svu_pv != '0')) \
1645 ? SvNVX(sv) != 0.0 \
1647 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1648 #endif /* __GNU__ */
1650 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1651 (SVf_FAKE | SVf_READONLY))
1652 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1654 #define SvSHARED_HEK_FROM_PV(pvx) \
1655 ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
1656 #define SvSHARED_HASH(sv) (0 + SvSHARED_HEK_FROM_PV(SvPVX_const(sv))->hek_hash)
1658 /* flag values for sv_*_flags functions */
1659 #define SV_IMMEDIATE_UNREF 1
1661 #define SV_COW_DROP_PV 4
1662 #define SV_UTF8_NO_ENCODING 8
1663 #define SV_NOSTEAL 16
1664 #define SV_CONST_RETURN 32
1665 #define SV_MUTABLE_RETURN 64
1666 #define SV_SMAGIC 128
1667 #define SV_HAS_TRAILING_NUL 256
1669 #define sv_unref(sv) sv_unref_flags(sv, 0)
1670 #define sv_force_normal(sv) sv_force_normal_flags(sv, 0)
1671 #define sv_usepvn(sv, p, l) sv_usepvn_flags(sv, p, l, 0)
1672 #define sv_usepvn_mg(sv, p, l) sv_usepvn_flags(sv, p, l, SV_SMAGIC)
1674 /* We are about to replace the SV's current value. So if it's copy on write
1675 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1676 the value is about to get thrown away, so drop the PV rather than go to
1677 the effort of making a read-write copy only for it to get immediately
1680 #define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1681 sv_force_normal_flags(sv, SV_COW_DROP_PV)
1683 #ifdef PERL_OLD_COPY_ON_WRITE
1684 # define SvRELEASE_IVX(sv) ((void)((SvFLAGS(sv) & (SVf_OOK|SVf_READONLY|SVf_FAKE)) \
1685 && Perl_sv_release_IVX(aTHX_ sv)))
1686 # define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
1688 # define SvRELEASE_IVX(sv) SvOOK_off(sv)
1689 #endif /* PERL_OLD_COPY_ON_WRITE */
1691 #define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1692 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1693 SVf_OOK|SVf_BREAK|SVf_READONLY)
1694 #define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1696 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1697 sv_force_normal_flags(sv, 0)
1700 /* all these 'functions' are now just macros */
1702 #define sv_pv(sv) SvPV_nolen(sv)
1703 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1704 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1706 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1707 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1708 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1709 #define sv_setsv(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_GMAGIC)
1710 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, 0)
1711 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1712 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1713 #define sv_catsv_mg(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC|SV_SMAGIC)
1714 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1715 #define sv_catpvn_mg(sv, sstr, slen) \
1716 sv_catpvn_flags(sv, sstr, slen, SV_GMAGIC|SV_SMAGIC);
1717 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1718 #define sv_2pv_nolen(sv) sv_2pv(sv, 0)
1719 #define sv_2pvbyte_nolen(sv) sv_2pvbyte(sv, 0)
1720 #define sv_2pvutf8_nolen(sv) sv_2pvutf8(sv, 0)
1721 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1722 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1723 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1724 #define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1725 #define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
1727 /* Should be named SvCatPVN_utf8_upgrade? */
1728 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1731 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1733 sv_setpvn(nsv, sstr, slen); \
1735 sv_utf8_upgrade(nsv); \
1736 sv_catsv(dsv, nsv); \
1740 =for apidoc Am|SV*|newRV_inc|SV* sv
1742 Creates an RV wrapper for an SV. The reference count for the original SV is
1748 #define newRV_inc(sv) newRV(sv)
1750 /* the following macros update any magic values this sv is associated with */
1753 =head1 Magical Functions
1755 =for apidoc Am|void|SvGETMAGIC|SV* sv
1756 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1757 argument more than once.
1759 =for apidoc Am|void|SvSETMAGIC|SV* sv
1760 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1761 argument more than once.
1763 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1764 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1767 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1768 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1769 ssv. May evaluate arguments more than once.
1771 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1772 Like C<SvSetSV>, but does any set magic required afterwards.
1774 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1775 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1777 =for apidoc Am|void|SvSHARE|SV* sv
1778 Arranges for sv to be shared between threads if a suitable module
1781 =for apidoc Am|void|SvLOCK|SV* sv
1782 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1785 =for apidoc Am|void|SvUNLOCK|SV* sv
1786 Releases a mutual exclusion lock on sv if a suitable module
1789 =head1 SV Manipulation Functions
1791 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1792 Expands the character buffer in the SV so that it has room for the
1793 indicated number of bytes (remember to reserve space for an extra trailing
1794 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1795 Returns a pointer to the character buffer.
1800 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1801 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1802 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1804 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1805 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1807 #define SvSetSV_and(dst,src,finally) \
1809 if ((dst) != (src)) { \
1810 sv_setsv(dst, src); \
1814 #define SvSetSV_nosteal_and(dst,src,finally) \
1816 if ((dst) != (src)) { \
1817 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL); \
1822 #define SvSetSV(dst,src) \
1823 SvSetSV_and(dst,src,/*nothing*/;)
1824 #define SvSetSV_nosteal(dst,src) \
1825 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1827 #define SvSetMagicSV(dst,src) \
1828 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1829 #define SvSetMagicSV_nosteal(dst,src) \
1830 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1833 #if !defined(SKIP_DEBUGGING)
1834 #define SvPEEK(sv) sv_peek(sv)
1836 #define SvPEEK(sv) ""
1839 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1841 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1843 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1844 /* If I give every macro argument a different name, then there won't be bugs
1845 where nested macros get confused. Been there, done that. */
1846 #define isGV_with_GP(pwadak) \
1847 (((SvFLAGS(pwadak) & (SVp_POK|SVp_SCREAM)) == SVp_SCREAM) \
1848 && (SvTYPE(pwadak) == SVt_PVGV || SvTYPE(pwadak) == SVt_PVLV))
1850 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1851 #define SvGROW_mutable(sv,len) \
1852 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
1853 #define Sv_Grow sv_grow
1855 #define CLONEf_COPY_STACKS 1
1856 #define CLONEf_KEEP_PTR_TABLE 2
1857 #define CLONEf_CLONE_HOST 4
1858 #define CLONEf_JOIN_IN 8
1860 struct clone_params {
1863 PerlInterpreter *proto_perl;
1868 * c-indentation-style: bsd
1870 * indent-tabs-mode: t
1873 * ex: set ts=8 sts=4 sw=4 noet: