3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005 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 */
67 #define PTE_SVSLOT SVt_RV
69 #if defined(PERL_IN_HV_C) || defined(PERL_IN_XS_APITEST)
70 #define HE_SVSLOT SVt_NULL
73 /* typedefs to eliminate some typing */
75 typedef struct hek HEK;
77 /* Using C's structural equivalence to help emulate C++ inheritance here... */
79 /* start with 2 sv-head building blocks */
80 #define _SV_HEAD(ptrtype) \
81 ptrtype sv_any; /* pointer to body */ \
82 U32 sv_refcnt; /* how many references to us */ \
83 U32 sv_flags /* what we are */
85 #define _SV_HEAD_UNION \
89 SV* svu_rv; /* pointer to another SV */ \
90 char* svu_pv; /* pointer to malloced string */ \
96 struct STRUCT_SV { /* struct sv { */
99 #ifdef DEBUG_LEAKING_SCALARS
100 unsigned sv_debug_optype:9; /* the type of OP that allocated us */
101 unsigned sv_debug_inpad:1; /* was allocated in a pad for an OP */
102 unsigned sv_debug_cloned:1; /* was cloned for an ithread */
103 unsigned sv_debug_line:16; /* the line where we were allocated */
104 char * sv_debug_file; /* the file where we were allocated */
109 _SV_HEAD(XPVGV*); /* pointer to xpvgv body */
114 _SV_HEAD(XPVCV*); /* pointer to xpvcv body */
119 _SV_HEAD(XPVAV*); /* pointer to xpvav body */
124 _SV_HEAD(XPVHV*); /* pointer to xpvhv body */
129 _SV_HEAD(XPVIO*); /* pointer to xpvio body */
134 #undef _SV_HEAD_UNION /* ensure no pollution */
137 =head1 SV Manipulation Functions
139 =for apidoc Am|U32|SvREFCNT|SV* sv
140 Returns the value of the object's reference count.
142 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
143 Increments the reference count of the given SV.
145 =for apidoc Am|void|SvREFCNT_dec|SV* sv
146 Decrements the reference count of the given SV.
148 =for apidoc Am|svtype|SvTYPE|SV* sv
149 Returns the type of the SV. See C<svtype>.
151 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
152 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
153 perform the upgrade if necessary. See C<svtype>.
158 #define SvANY(sv) (sv)->sv_any
159 #define SvFLAGS(sv) (sv)->sv_flags
160 #define SvREFCNT(sv) (sv)->sv_refcnt
162 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
163 # define SvREFCNT_inc(sv) \
165 SV * const _sv = (SV*)(sv); \
171 # define SvREFCNT_inc(sv) \
172 ((PL_Sv=(SV*)(sv)) ? ((++(SvREFCNT(PL_Sv))),(PL_Sv)) : NULL)
175 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
176 # define SvREFCNT_dec(sv) \
178 SV * const _sv = (SV*)(sv); \
180 if (SvREFCNT(_sv)) { \
181 if (--(SvREFCNT(_sv)) == 0) \
182 Perl_sv_free2(aTHX_ _sv); \
189 #define SvREFCNT_dec(sv) sv_free((SV*)(sv))
192 #define SVTYPEMASK 0xff
193 #define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK)
195 /* Sadly there are some parts of the core that have pointers to already-freed
196 SV heads, and rely on being able to tell that they are now free. So mark
197 them all by using a consistent macro. */
198 #define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
200 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= (mt) || (sv_upgrade(sv, mt), 1))
202 #define SVs_PADSTALE 0x00000100 /* lexical has gone out of scope */
203 #define SVs_PADTMP 0x00000200 /* in use as tmp */
204 #define SVs_PADMY 0x00000400 /* in use a "my" variable */
205 #define SVs_TEMP 0x00000800 /* string is stealable? */
206 #define SVs_OBJECT 0x00001000 /* is "blessed" */
207 #define SVs_GMG 0x00002000 /* has magical get method */
208 #define SVs_SMG 0x00004000 /* has magical set method */
209 #define SVs_RMG 0x00008000 /* has random magical methods */
211 #define SVf_IOK 0x00010000 /* has valid public integer value */
212 #define SVf_NOK 0x00020000 /* has valid public numeric value */
213 #define SVf_POK 0x00040000 /* has valid public pointer value */
214 #define SVf_ROK 0x00080000 /* has a valid reference pointer */
216 #define SVf_FAKE 0x00100000 /* glob or lexical is just a copy */
217 #define SVf_OOK 0x00200000 /* has valid offset value
218 For a PVHV this means that a
219 hv_aux struct is present after the
221 #define SVf_BREAK 0x00400000 /* refcnt is artificially low - used
222 * by SV's in final arena cleanup */
223 #define SVf_READONLY 0x00800000 /* may not be modified */
226 #define SVp_IOK 0x01000000 /* has valid non-public integer value */
227 #define SVp_NOK 0x02000000 /* has valid non-public numeric value */
228 #define SVp_POK 0x04000000 /* has valid non-public pointer value */
229 #define SVp_SCREAM 0x08000000 /* has been studied? */
231 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded */
232 /* Ensure this value does not clash with the GV_ADD* flags in gv.h */
234 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
236 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
237 SVp_IOK|SVp_NOK|SVp_POK)
239 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
241 #define PRIVSHIFT 8 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
243 /* Some private flags. */
245 /* SVpad_OUR may be set on SVt_PV{NV,MG,GV} types */
246 #define SVpad_OUR 0x80000000 /* pad name is "our" instead of "my" */
247 #define SVpad_TYPED 0x40000000 /* Typed Lexical */
249 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
251 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
253 #define SVpbm_VALID 0x80000000
254 #define SVpbm_TAIL 0x40000000
256 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
258 #define SVphv_CLONEABLE 0x08000000 /* for stashes: clone its objects */
259 #define SVphv_REHASH 0x10000000 /* HV is recalculating hash values */
260 #define SVphv_SHAREKEYS 0x20000000 /* keys live on shared string table */
261 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
262 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
264 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
266 #define SVpav_REAL 0x40000000 /* free old entries */
267 #define SVpav_REIFY 0x80000000 /* can become real */
270 NV xnv_nv; /* numeric value, if any */
271 STRLEN xpv_cur; /* length of svu_pv as a C string */
272 STRLEN xpv_len; /* allocated size */
276 typedef struct xpv xpv_allocated;
279 STRLEN xpv_cur; /* length of svu_pv as a C string */
280 STRLEN xpv_len; /* allocated size */
285 NV xnv_nv; /* numeric value, if any */
286 STRLEN xpv_cur; /* length of svu_pv as a C string */
287 STRLEN xpv_len; /* allocated size */
289 IV xivu_iv; /* integer value or pv offset */
296 typedef struct xpviv xpviv_allocated;
299 STRLEN xpv_cur; /* length of svu_pv as a C string */
300 STRLEN xpv_len; /* allocated size */
302 IV xivu_iv; /* integer value or pv offset */
309 #define xiv_iv xiv_u.xivu_iv
312 NV xnv_nv; /* numeric value, if any */
313 STRLEN xpv_cur; /* length of svu_pv as a C string */
314 STRLEN xpv_len; /* allocated size */
317 UV xuvu_uv; /* unsigned value or pv offset */
322 #define xuv_uv xuv_u.xuvu_uv
325 NV xnv_nv; /* numeric value, if any */
326 STRLEN xpv_cur; /* length of svu_pv as a C string */
327 STRLEN xpv_len; /* allocated size */
329 IV xivu_iv; /* integer value or pv offset */
335 /* These structure must match the beginning of struct xpvhv in hv.h. */
337 NV xnv_nv; /* numeric value, if any */
338 STRLEN xpv_cur; /* length of svu_pv as a C string */
339 STRLEN xpv_len; /* allocated size */
341 IV xivu_iv; /* integer value or pv offset */
345 MAGIC* xmg_magic; /* linked list of magicalness */
346 HV* xmg_stash; /* class package */
350 NV xnv_nv; /* numeric value, if any */
351 STRLEN xpv_cur; /* length of svu_pv as a C string */
352 STRLEN xpv_len; /* allocated size */
354 IV xivu_iv; /* integer value or pv offset */
358 MAGIC* xmg_magic; /* linked list of magicalness */
359 HV* xmg_stash; /* class package */
361 /* a full glob fits into this */
371 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
372 * y=alem/helem/iter t=tie T=tied HE */
376 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 */
380 IV xivu_iv; /* integer value or pv offset */
384 MAGIC* xmg_magic; /* linked list of magicalness */
385 HV* xmg_stash; /* class package */
395 NV xnv_nv; /* numeric value, if any */
396 STRLEN xpv_cur; /* length of svu_pv as a C string */
397 STRLEN xpv_len; /* allocated size */
399 IV xivu_iv; /* integer value or pv offset */
403 MAGIC* xmg_magic; /* linked list of magicalness */
404 HV* xmg_stash; /* class package */
406 I32 xbm_useful; /* is this constant pattern being useful? */
407 U16 xbm_previous; /* how many characters in string before rare? */
408 U8 xbm_rare; /* rarest character in string */
411 /* This structure must match XPVCV in cv.h */
413 typedef U16 cv_flags_t;
416 NV xnv_nv; /* numeric value, if any */
417 STRLEN xpv_cur; /* length of svu_pv as a C string */
418 STRLEN xpv_len; /* allocated size */
420 IV xivu_iv; /* integer value or pv offset */
424 MAGIC* xmg_magic; /* linked list of magicalness */
425 HV* xmg_stash; /* class package */
430 void (*xcv_xsub)(pTHX_ CV*);
434 long xcv_depth; /* >= 2 indicates recursive call */
437 cv_flags_t xcv_flags;
438 U32 xcv_outside_seq; /* the COP sequence (at the point of our
439 * compilation) in the lexically enclosing
445 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 */
453 MAGIC* xmg_magic; /* linked list of magicalness */
454 HV* xmg_stash; /* class package */
456 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
457 PerlIO * xio_ofp; /* but sockets need separate streams */
458 /* Cray addresses everything by word boundaries (64 bits) and
459 * code and data pointers cannot be mixed (which is exactly what
460 * Perl_filter_add() tries to do with the dirp), hence the following
461 * union trick (as suggested by Gurusamy Sarathy).
462 * For further information see Geir Johansen's problem report titled
463 [ID 20000612.002] Perl problem on Cray system
464 * The any pointer (known as IoANY()) will also be a good place
465 * to hang any IO disciplines to.
468 DIR * xiou_dirp; /* for opendir, readdir, etc */
469 void * xiou_any; /* for alignment */
471 IV xio_lines; /* $. */
472 IV xio_page; /* $% */
473 IV xio_page_len; /* $= */
474 IV xio_lines_left; /* $- */
475 char * xio_top_name; /* $^ */
476 GV * xio_top_gv; /* $^ */
477 char * xio_fmt_name; /* $~ */
478 GV * xio_fmt_gv; /* $~ */
479 char * xio_bottom_name;/* $^B */
480 GV * xio_bottom_gv; /* $^B */
481 short xio_subprocess; /* -| or |- */
485 #define xio_dirp xio_dirpu.xiou_dirp
486 #define xio_any xio_dirpu.xiou_any
488 #define IOf_ARGV 1 /* this fp iterates over ARGV */
489 #define IOf_START 2 /* check for null ARGV and substitute '-' */
490 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
491 #define IOf_DIDTOP 8 /* just did top of form */
492 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
493 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
494 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
496 /* The following macros define implementation-independent predicates on SVs. */
499 =for apidoc Am|bool|SvNIOK|SV* sv
500 Returns a boolean indicating whether the SV contains a number, integer or
503 =for apidoc Am|bool|SvNIOKp|SV* sv
504 Returns a boolean indicating whether the SV contains a number, integer or
505 double. Checks the B<private> setting. Use C<SvNIOK>.
507 =for apidoc Am|void|SvNIOK_off|SV* sv
508 Unsets the NV/IV status of an SV.
510 =for apidoc Am|bool|SvOK|SV* sv
511 Returns a boolean indicating whether the value is an SV. It also tells
512 whether the value is defined or not.
514 =for apidoc Am|bool|SvIOKp|SV* sv
515 Returns a boolean indicating whether the SV contains an integer. Checks
516 the B<private> setting. Use C<SvIOK>.
518 =for apidoc Am|bool|SvNOKp|SV* sv
519 Returns a boolean indicating whether the SV contains a double. Checks the
520 B<private> setting. Use C<SvNOK>.
522 =for apidoc Am|bool|SvPOKp|SV* sv
523 Returns a boolean indicating whether the SV contains a character string.
524 Checks the B<private> setting. Use C<SvPOK>.
526 =for apidoc Am|bool|SvIOK|SV* sv
527 Returns a boolean indicating whether the SV contains an integer.
529 =for apidoc Am|void|SvIOK_on|SV* sv
530 Tells an SV that it is an integer.
532 =for apidoc Am|void|SvIOK_off|SV* sv
533 Unsets the IV status of an SV.
535 =for apidoc Am|void|SvIOK_only|SV* sv
536 Tells an SV that it is an integer and disables all other OK bits.
538 =for apidoc Am|void|SvIOK_only_UV|SV* sv
539 Tells and SV that it is an unsigned integer and disables all other OK bits.
541 =for apidoc Am|bool|SvIOK_UV|SV* sv
542 Returns a boolean indicating whether the SV contains an unsigned integer.
544 =for apidoc Am|void|SvUOK|SV* sv
545 Returns a boolean indicating whether the SV contains an unsigned integer.
547 =for apidoc Am|bool|SvIOK_notUV|SV* sv
548 Returns a boolean indicating whether the SV contains a signed integer.
550 =for apidoc Am|bool|SvNOK|SV* sv
551 Returns a boolean indicating whether the SV contains a double.
553 =for apidoc Am|void|SvNOK_on|SV* sv
554 Tells an SV that it is a double.
556 =for apidoc Am|void|SvNOK_off|SV* sv
557 Unsets the NV status of an SV.
559 =for apidoc Am|void|SvNOK_only|SV* sv
560 Tells an SV that it is a double and disables all other OK bits.
562 =for apidoc Am|bool|SvPOK|SV* sv
563 Returns a boolean indicating whether the SV contains a character
566 =for apidoc Am|void|SvPOK_on|SV* sv
567 Tells an SV that it is a string.
569 =for apidoc Am|void|SvPOK_off|SV* sv
570 Unsets the PV status of an SV.
572 =for apidoc Am|void|SvPOK_only|SV* sv
573 Tells an SV that it is a string and disables all other OK bits.
574 Will also turn off the UTF-8 status.
576 =for apidoc Am|bool|SvVOK|SV* sv
577 Returns a boolean indicating whether the SV contains a v-string.
579 =for apidoc Am|bool|SvOOK|SV* sv
580 Returns a boolean indicating whether the SvIVX is a valid offset value for
581 the SvPVX. This hack is used internally to speed up removal of characters
582 from the beginning of a SvPV. When SvOOK is true, then the start of the
583 allocated string buffer is really (SvPVX - SvIVX).
585 =for apidoc Am|bool|SvROK|SV* sv
586 Tests if the SV is an RV.
588 =for apidoc Am|void|SvROK_on|SV* sv
589 Tells an SV that it is an RV.
591 =for apidoc Am|void|SvROK_off|SV* sv
592 Unsets the RV status of an SV.
594 =for apidoc Am|SV*|SvRV|SV* sv
595 Dereferences an RV to return the SV.
597 =for apidoc Am|IV|SvIVX|SV* sv
598 Returns the raw value in the SV's IV slot, without checks or conversions.
599 Only use when you are sure SvIOK is true. See also C<SvIV()>.
601 =for apidoc Am|UV|SvUVX|SV* sv
602 Returns the raw value in the SV's UV slot, without checks or conversions.
603 Only use when you are sure SvIOK is true. See also C<SvUV()>.
605 =for apidoc Am|NV|SvNVX|SV* sv
606 Returns the raw value in the SV's NV slot, without checks or conversions.
607 Only use when you are sure SvNOK is true. See also C<SvNV()>.
609 =for apidoc Am|char*|SvPVX|SV* sv
610 Returns a pointer to the physical string in the SV. The SV must contain a
613 =for apidoc Am|STRLEN|SvCUR|SV* sv
614 Returns the length of the string which is in the SV. See C<SvLEN>.
616 =for apidoc Am|STRLEN|SvLEN|SV* sv
617 Returns the size of the string buffer in the SV, not including any part
618 attributable to C<SvOOK>. See C<SvCUR>.
620 =for apidoc Am|char*|SvEND|SV* sv
621 Returns a pointer to the last character in the string which is in the SV.
622 See C<SvCUR>. Access the character as *(SvEND(sv)).
624 =for apidoc Am|HV*|SvSTASH|SV* sv
625 Returns the stash of the SV.
627 =for apidoc Am|void|SvIV_set|SV* sv|IV val
628 Set the value of the IV pointer in sv to val. It is possible to perform
629 the same function of this macro with an lvalue assignment to C<SvIVX>.
630 With future Perls, however, it will be more efficient to use
631 C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
633 =for apidoc Am|void|SvNV_set|SV* sv|NV val
634 Set the value of the NV pointer in sv to val. See C<SvIV_set>.
636 =for apidoc Am|void|SvPV_set|SV* sv|char* val
637 Set the value of the PV pointer in sv to val. See C<SvIV_set>.
639 =for apidoc Am|void|SvUV_set|SV* sv|UV val
640 Set the value of the UV pointer in sv to val. See C<SvIV_set>.
642 =for apidoc Am|void|SvRV_set|SV* sv|SV* val
643 Set the value of the RV pointer in sv to val. See C<SvIV_set>.
645 =for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
646 Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>.
648 =for apidoc Am|void|SvSTASH_set|SV* sv|STASH* val
649 Set the value of the STASH pointer in sv to val. See C<SvIV_set>.
651 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
652 Set the current length of the string which is in the SV. See C<SvCUR>
655 =for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
656 Set the actual length of the string which is in the SV. See C<SvIV_set>.
661 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
662 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
663 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
664 SVp_IOK|SVp_NOK|SVf_IVisUV))
666 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
667 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
669 #define assert_not_ROK(sv)
672 #define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
673 #define SvOK_off(sv) (assert_not_ROK(sv) \
674 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
675 SVf_IVisUV|SVf_UTF8), \
677 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
678 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
682 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
683 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
684 #define SvIOKp_on(sv) (SvRELEASE_IVX(sv), \
685 SvFLAGS(sv) |= SVp_IOK)
686 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
687 #define SvNOKp_on(sv) (SvFLAGS(sv) |= SVp_NOK)
688 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
689 #define SvPOKp_on(sv) (assert_not_ROK(sv) \
690 SvFLAGS(sv) |= SVp_POK)
692 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
693 #define SvIOK_on(sv) (SvRELEASE_IVX(sv), \
694 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
695 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
696 #define SvIOK_only(sv) (SvOK_off(sv), \
697 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
698 #define SvIOK_only_UV(sv) (SvOK_off_exc_UV(sv), \
699 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
701 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
702 == (SVf_IOK|SVf_IVisUV))
703 #define SvUOK(sv) SvIOK_UV(sv)
704 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
707 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
708 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
709 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
711 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
712 #define SvNOK_on(sv) (SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
713 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
714 #define SvNOK_only(sv) (SvOK_off(sv), \
715 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
718 =for apidoc Am|bool|SvUTF8|SV* sv
719 Returns a boolean indicating whether the SV contains UTF-8 encoded data.
721 =for apidoc Am|void|SvUTF8_on|SV *sv
722 Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
723 Do not use frivolously.
725 =for apidoc Am|void|SvUTF8_off|SV *sv
726 Unsets the UTF-8 status of an SV.
728 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
729 Tells an SV that it is a string and disables all other OK bits,
730 and leaves the UTF-8 status as it was.
735 /* Ensure the return value of this macro does not clash with the GV_ADD* flags
737 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
738 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
739 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
741 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
742 #define SvPOK_on(sv) (assert_not_ROK(sv) \
743 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
744 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
745 #define SvPOK_only(sv) (assert_not_ROK(sv) \
746 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
747 SVf_IVisUV|SVf_UTF8), \
748 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
749 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) \
750 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
752 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
754 #define SvVOK(sv) (SvMAGICAL(sv) && mg_find(sv,'V'))
755 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
756 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
757 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
759 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
760 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
761 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
763 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
764 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
765 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVf_AMAGIC))
767 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
768 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
769 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
771 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
772 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
773 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
775 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
776 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
777 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
779 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
780 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
781 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
783 #define SvAMAGIC(sv) (SvFLAGS(sv) & SVf_AMAGIC)
784 #define SvAMAGIC_on(sv) (SvFLAGS(sv) |= SVf_AMAGIC)
785 #define SvAMAGIC_off(sv) (SvFLAGS(sv) &= ~SVf_AMAGIC)
787 #define SvGAMAGIC(sv) (SvFLAGS(sv) & (SVs_GMG|SVf_AMAGIC))
790 #define Gv_AMG(stash) \
791 (HV_AMAGICmb(stash) && \
792 ((!HV_AMAGICbad(stash) && HV_AMAGIC(stash)) || Gv_AMupdate(stash)))
794 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
796 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
797 == (SVf_ROK|SVprv_WEAKREF))
798 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
799 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
801 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
803 #define SvPADSTALE(sv) (SvFLAGS(sv) & SVs_PADSTALE)
804 #define SvPADSTALE_on(sv) (SvFLAGS(sv) |= SVs_PADSTALE)
805 #define SvPADSTALE_off(sv) (SvFLAGS(sv) &= ~SVs_PADSTALE)
807 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
808 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
809 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
811 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
812 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY)
814 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
815 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
816 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
818 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
819 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
820 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
822 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
823 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
824 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
826 #define SvSCREAM(sv) (SvFLAGS(sv) & SVp_SCREAM)
827 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
828 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
830 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
831 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
832 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
834 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
835 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
836 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
838 #define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL)
839 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
840 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
842 #define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
843 #define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
844 #define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
847 /* The following uses the FAKE flag to show that a regex pointer is infact
848 its own offset in the regexpad for ithreads */
849 #define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
850 #define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
851 #define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
854 #ifdef PERL_DEBUG_COW
855 #define SvRV(sv) (0 + (sv)->sv_u.svu_rv)
857 #define SvRV(sv) ((sv)->sv_u.svu_rv)
859 #define SvRVx(sv) SvRV(sv)
861 #ifdef PERL_DEBUG_COW
862 /* Need -0.0 for SvNVX to preserve IEEE FP "negative zero" because
863 +0.0 + -0.0 => +0.0 but -0.0 + -0.0 => -0.0 */
864 # define SvIVX(sv) (0 + ((XPVIV*) SvANY(sv))->xiv_iv)
865 # define SvUVX(sv) (0 + ((XPVUV*) SvANY(sv))->xuv_uv)
866 # define SvNVX(sv) (-0.0 + ((XPVNV*) SvANY(sv))->xnv_nv)
867 /* Don't test the core XS code yet. */
868 # if defined (PERL_CORE) && PERL_DEBUG_COW > 1
869 # define SvPVX(sv) (0 + (assert(!SvREADONLY(sv)), (sv)->sv_u.svu_pv))
871 # define SvPVX(sv) SvPVX_mutable(sv)
873 # define SvCUR(sv) (0 + ((XPV*) SvANY(sv))->xpv_cur)
874 # define SvLEN(sv) (0 + ((XPV*) SvANY(sv))->xpv_len)
875 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
879 /* Can't make this RVALUE because of Perl_sv_unmagic. */
880 # define SvMAGIC(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
882 # define SvMAGIC(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
884 # define SvSTASH(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
887 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
889 # define SvMAGIC(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_magic)
891 # define SvSTASH(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_stash)
894 # define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
895 # define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
896 # define SvNVX(sv) ((XPVNV*) SvANY(sv))->xnv_nv
897 # define SvPVX(sv) ((sv)->sv_u.svu_pv)
898 # define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
899 # define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
900 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
903 # define SvMAGIC(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
904 # define SvSTASH(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
906 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
907 # define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
912 /* Given that these two are new, there can't be any existing code using them
914 # define SvPVX_mutable(sv) (0 + (sv)->sv_u.svu_pv)
915 # define SvPVX_const(sv) ((const char*)(0 + (sv)->sv_u.svu_pv))
917 /* Except for the poison code, which uses & to scribble over the pointer after
919 # define SvPVX_mutable(sv) ((sv)->sv_u.svu_pv)
920 # define SvPVX_const(sv) ((const char*)((sv)->sv_u.svu_pv))
923 #define SvIVXx(sv) SvIVX(sv)
924 #define SvUVXx(sv) SvUVX(sv)
925 #define SvNVXx(sv) SvNVX(sv)
926 #define SvPVXx(sv) SvPVX(sv)
927 #define SvLENx(sv) SvLEN(sv)
928 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
931 /* Ask a scalar nicely to try to become an IV, if possible.
932 Not guaranteed to stay returning void */
933 /* Macro won't actually call sv_2iv if already IOK */
934 #define SvIV_please(sv) \
935 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
936 (void) SvIV(sv); } STMT_END
937 #define SvIV_set(sv, val) \
938 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
939 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
940 #define SvNV_set(sv, val) \
941 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
942 assert(SvTYPE(sv) != SVt_PVAV); assert(SvTYPE(sv) != SVt_PVHV); \
943 (((XPVNV*)SvANY(sv))->xnv_nv = (val)); } STMT_END
944 #define SvPV_set(sv, val) \
945 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
946 ((sv)->sv_u.svu_pv = (val)); } STMT_END
947 #define SvUV_set(sv, val) \
948 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
949 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
950 #define SvRV_set(sv, val) \
951 STMT_START { assert(SvTYPE(sv) >= SVt_RV); \
952 ((sv)->sv_u.svu_rv = (val)); } STMT_END
953 #define SvMAGIC_set(sv, val) \
954 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
955 (((XPVMG*)SvANY(sv))->xmg_magic = (val)); } STMT_END
956 #define SvSTASH_set(sv, val) \
957 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
958 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
959 #define SvCUR_set(sv, val) \
960 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
961 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
962 #define SvLEN_set(sv, val) \
963 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
964 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
965 #define SvEND_set(sv, val) \
966 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
967 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
969 #define SvPV_renew(sv,n) \
970 STMT_START { SvLEN_set(sv, n); \
971 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
972 (char*)saferealloc((Malloc_t)SvPVX(sv), \
973 (MEM_SIZE)((n))))); \
976 #define SvPV_shrink_to_cur(sv) STMT_START { \
977 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
978 SvPV_renew(sv, _lEnGtH); \
981 #define SvPV_free(sv) \
983 assert(SvTYPE(sv) >= SVt_PV); \
986 SvPV_set(sv, SvPVX_mutable(sv) - SvIVX(sv)); \
987 SvFLAGS(sv) &= ~SVf_OOK; \
989 Safefree(SvPVX(sv)); \
993 #define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
994 #define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
995 #define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
997 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
999 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
1000 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
1001 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
1002 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
1004 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
1005 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
1006 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
1007 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
1008 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
1009 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
1010 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
1011 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
1012 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
1013 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
1014 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
1015 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
1016 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
1017 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
1018 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
1019 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1020 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1022 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
1023 #define IoTYPE_RDONLY '<'
1024 #define IoTYPE_WRONLY '>'
1025 #define IoTYPE_RDWR '+'
1026 #define IoTYPE_APPEND 'a'
1027 #define IoTYPE_PIPE '|'
1028 #define IoTYPE_STD '-' /* stdin or stdout */
1029 #define IoTYPE_SOCKET 's'
1030 #define IoTYPE_CLOSED ' '
1031 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1032 #define IoTYPE_NUMERIC '#' /* fdopen */
1035 =for apidoc Am|bool|SvTAINTED|SV* sv
1036 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
1039 =for apidoc Am|void|SvTAINTED_on|SV* sv
1040 Marks an SV as tainted if tainting is enabled.
1042 =for apidoc Am|void|SvTAINTED_off|SV* sv
1043 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1044 some of Perl's fundamental security features. XS module authors should not
1045 use this function unless they fully understand all the implications of
1046 unconditionally untainting the value. Untainting should be done in the
1047 standard perl fashion, via a carefully crafted regexp, rather than directly
1048 untainting variables.
1050 =for apidoc Am|void|SvTAINT|SV* sv
1051 Taints an SV if tainting is enabled.
1056 #define sv_taint(sv) sv_magic((sv), Nullsv, PERL_MAGIC_taint, Nullch, 0)
1058 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1059 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
1060 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
1062 #define SvTAINT(sv) \
1064 if (PL_tainting) { \
1071 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
1072 Like C<SvPV> but will force the SV into containing just a string
1073 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1076 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
1077 Like C<SvPV> but will force the SV into containing just a string
1078 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1079 directly. Doesn't process magic.
1081 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
1082 Returns a pointer to the string in the SV, or a stringified form of
1083 the SV if the SV does not contain a string. The SV may cache the
1084 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
1085 C<SvPVx> for a version which guarantees to evaluate sv only once.
1087 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
1088 A version of C<SvPV> which guarantees to evaluate sv only once.
1090 =for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1091 Like C<SvPV> but doesn't process magic.
1093 =for apidoc Am|char*|SvPV_nolen|SV* sv
1094 Returns a pointer to the string in the SV, or a stringified form of
1095 the SV if the SV does not contain a string. The SV may cache the
1096 stringified form becoming C<SvPOK>. Handles 'get' magic.
1098 =for apidoc Am|IV|SvIV|SV* sv
1099 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
1100 version which guarantees to evaluate sv only once.
1102 =for apidoc Am|IV|SvIV_nomg|SV* sv
1103 Like C<SvIV> but doesn't process magic.
1105 =for apidoc Am|IV|SvIVx|SV* sv
1106 Coerces the given SV to an integer and returns it. Guarantees to evaluate
1107 sv only once. Use the more efficient C<SvIV> otherwise.
1109 =for apidoc Am|NV|SvNV|SV* sv
1110 Coerce the given SV to a double and return it. See C<SvNVx> for a version
1111 which guarantees to evaluate sv only once.
1113 =for apidoc Am|NV|SvNVx|SV* sv
1114 Coerces the given SV to a double and returns it. Guarantees to evaluate
1115 sv only once. Use the more efficient C<SvNV> otherwise.
1117 =for apidoc Am|UV|SvUV|SV* sv
1118 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
1119 for a version which guarantees to evaluate sv only once.
1121 =for apidoc Am|UV|SvUV_nomg|SV* sv
1122 Like C<SvUV> but doesn't process magic.
1124 =for apidoc Am|UV|SvUVx|SV* sv
1125 Coerces the given SV to an unsigned integer and returns it. Guarantees to
1126 evaluate sv only once. Use the more efficient C<SvUV> otherwise.
1128 =for apidoc Am|bool|SvTRUE|SV* sv
1129 Returns a boolean indicating whether Perl would evaluate the SV as true or
1130 false, defined or undefined. Does not handle 'get' magic.
1132 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
1133 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1135 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
1136 Like C<SvPV>, but converts sv to utf8 first if necessary.
1138 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1139 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
1141 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1142 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1144 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1145 Like C<SvPV>, but converts sv to byte representation first if necessary.
1147 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1148 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1150 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1151 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1152 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1155 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1156 Like C<SvPV>, but converts sv to utf8 first if necessary.
1157 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1160 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1161 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1162 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1165 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1166 Like C<SvPV>, but converts sv to byte representation first if necessary.
1167 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1170 =for apidoc Am|bool|SvIsCOW|SV* sv
1171 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1172 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1175 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1176 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1179 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1180 Like C<sv_catpvn> but doesn't process magic.
1182 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1183 Like C<sv_setsv> but doesn't process magic.
1185 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1186 Like C<sv_catsv> but doesn't process magic.
1191 /* Let us hope that bitmaps for UV and IV are the same */
1192 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1193 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1194 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1196 #define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1197 #define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1201 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1202 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1203 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1205 #define SvPV_flags(sv, lp, flags) \
1206 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1207 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1208 #define SvPV_flags_const(sv, lp, flags) \
1209 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1210 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1211 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1212 #define SvPV_flags_const_nolen(sv, flags) \
1213 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1214 ? SvPVX_const(sv) : \
1215 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN))
1216 #define SvPV_flags_mutable(sv, lp, flags) \
1217 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1218 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1219 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1221 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1222 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1223 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1225 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1226 #define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
1228 #define SvPV_force_flags(sv, lp, flags) \
1229 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1230 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1231 #define SvPV_force_flags_nolen(sv, flags) \
1232 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1233 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1234 #define SvPV_force_flags_mutable(sv, lp, flags) \
1235 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1236 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1237 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1239 #define SvPV_nolen(sv) \
1240 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1241 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1243 #define SvPV_nolen_const(sv) \
1244 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1245 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1247 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1248 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1249 #define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
1253 #define SvPVutf8(sv, lp) \
1254 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1255 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1257 #define SvPVutf8_force(sv, lp) \
1258 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1259 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1262 #define SvPVutf8_nolen(sv) \
1263 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1264 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1268 #define SvPVbyte(sv, lp) \
1269 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1270 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1272 #define SvPVbyte_force(sv, lp) \
1273 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1274 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1276 #define SvPVbyte_nolen(sv) \
1277 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1278 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1282 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1283 * var to evaluate the arg once; failing that, use a global if possible;
1284 * failing that, call a function to do the work
1287 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1288 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1289 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1291 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1293 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1294 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1295 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1296 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1297 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1298 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1299 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1300 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1301 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1302 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1303 # define SvTRUE(sv) ( \
1307 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1309 (nxpv->xpv_cur > 1 || \
1310 (nxpv->xpv_cur && *(sv)->sv_u.svu_pv != '0')); }) \
1317 ? SvNVX(sv) != 0.0 \
1319 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1321 #else /* __GNUC__ */
1323 /* These inlined macros use globals, which will require a thread
1324 * declaration in user code, so we avoid them under threads */
1326 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1327 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1328 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1329 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1330 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1331 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1332 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1333 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1334 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1335 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1336 # define SvTRUE(sv) ( \
1340 ? ((PL_Xpv = (XPV*)SvANY(PL_Sv = (sv))) && \
1341 (PL_Xpv->xpv_cur > 1 || \
1342 (PL_Xpv->xpv_cur && *PL_Sv->sv_u.svu_pv != '0')) \
1349 ? SvNVX(sv) != 0.0 \
1351 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1352 #endif /* __GNU__ */
1354 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1355 (SVf_FAKE | SVf_READONLY))
1356 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1358 #define SvSHARED_HEK_FROM_PV(pvx) \
1359 ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
1360 #define SvSHARED_HASH(sv) (0 + SvSHARED_HEK_FROM_PV(SvPVX_const(sv))->hek_hash)
1362 /* flag values for sv_*_flags functions */
1363 #define SV_IMMEDIATE_UNREF 1
1365 #define SV_COW_DROP_PV 4
1366 #define SV_UTF8_NO_ENCODING 8
1367 #define SV_NOSTEAL 16
1368 #define SV_CONST_RETURN 32
1369 #define SV_MUTABLE_RETURN 64
1370 #define SV_SMAGIC 128
1372 #define sv_unref(sv) sv_unref_flags(sv, 0)
1373 #define sv_force_normal(sv) sv_force_normal_flags(sv, 0)
1375 /* We are about to replace the SV's current value. So if it's copy on write
1376 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1377 the value is about to get thrown away, so drop the PV rather than go to
1378 the effort of making a read-write copy only for it to get immediately
1381 #define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1382 sv_force_normal_flags(sv, SV_COW_DROP_PV)
1384 #ifdef PERL_OLD_COPY_ON_WRITE
1385 # define SvRELEASE_IVX(sv) ((void)((SvFLAGS(sv) & (SVf_OOK|SVf_READONLY|SVf_FAKE)) \
1386 && Perl_sv_release_IVX(aTHX_ sv)))
1387 # define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
1389 # define SvRELEASE_IVX(sv) SvOOK_off(sv)
1390 #endif /* PERL_OLD_COPY_ON_WRITE */
1392 #define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1393 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1394 SVf_OOK|SVf_BREAK|SVf_READONLY|SVf_AMAGIC)
1395 #define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1397 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1398 sv_force_normal_flags(sv, 0)
1401 /* all these 'functions' are now just macros */
1403 #define sv_pv(sv) SvPV_nolen(sv)
1404 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1405 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1407 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1408 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1409 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1410 #define sv_setsv(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_GMAGIC)
1411 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, 0)
1412 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1413 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1414 #define sv_catsv_mg(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC|SV_SMAGIC)
1415 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1416 #define sv_catpvn_mg(sv, sstr, slen) \
1417 sv_catpvn_flags(sv, sstr, slen, SV_GMAGIC|SV_SMAGIC);
1418 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1419 #define sv_2pv_nolen(sv) sv_2pv(sv, 0)
1420 #define sv_2pvbyte_nolen(sv) sv_2pvbyte(sv, 0)
1421 #define sv_2pvutf8_nolen(sv) sv_2pvutf8(sv, 0)
1422 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1423 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1424 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1425 #define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1426 #define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
1428 #define newSVpvs(str) newSVpvn(STR_WITH_LEN(str))
1429 #define newSVpvs_share(str) newSVpvn_share(STR_WITH_LEN(str), 0)
1430 #define sv_catpvs(sv, str) sv_catpvn_flags(sv, STR_WITH_LEN(str), SV_GMAGIC)
1432 /* Should be named SvCatPVN_utf8_upgrade? */
1433 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1436 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1438 sv_setpvn(nsv, sstr, slen); \
1440 sv_utf8_upgrade(nsv); \
1441 sv_catsv(dsv, nsv); \
1445 =for apidoc Am|SV*|newRV_inc|SV* sv
1447 Creates an RV wrapper for an SV. The reference count for the original SV is
1453 #define newRV_inc(sv) newRV(sv)
1455 /* the following macros update any magic values this sv is associated with */
1458 =head1 Magical Functions
1460 =for apidoc Am|void|SvGETMAGIC|SV* sv
1461 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1462 argument more than once.
1464 =for apidoc Am|void|SvSETMAGIC|SV* sv
1465 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1466 argument more than once.
1468 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1469 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1472 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1473 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1474 ssv. May evaluate arguments more than once.
1476 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1477 Like C<SvSetSV>, but does any set magic required afterwards.
1479 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1480 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1482 =for apidoc Am|void|SvSHARE|SV* sv
1483 Arranges for sv to be shared between threads if a suitable module
1486 =for apidoc Am|void|SvLOCK|SV* sv
1487 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1490 =for apidoc Am|void|SvUNLOCK|SV* sv
1491 Releases a mutual exclusion lock on sv if a suitable module
1494 =head1 SV Manipulation Functions
1496 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1497 Expands the character buffer in the SV so that it has room for the
1498 indicated number of bytes (remember to reserve space for an extra trailing
1499 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1500 Returns a pointer to the character buffer.
1505 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1506 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1507 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1509 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1510 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1512 #define SvSetSV_and(dst,src,finally) \
1514 if ((dst) != (src)) { \
1515 sv_setsv(dst, src); \
1519 #define SvSetSV_nosteal_and(dst,src,finally) \
1521 if ((dst) != (src)) { \
1522 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL); \
1527 #define SvSetSV(dst,src) \
1528 SvSetSV_and(dst,src,/*nothing*/;)
1529 #define SvSetSV_nosteal(dst,src) \
1530 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1532 #define SvSetMagicSV(dst,src) \
1533 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1534 #define SvSetMagicSV_nosteal(dst,src) \
1535 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1538 #if !defined(SKIP_DEBUGGING)
1539 #define SvPEEK(sv) sv_peek(sv)
1541 #define SvPEEK(sv) ""
1544 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1546 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1548 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1550 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1551 #define SvGROW_mutable(sv,len) \
1552 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
1553 #define Sv_Grow sv_grow
1555 #define CLONEf_COPY_STACKS 1
1556 #define CLONEf_KEEP_PTR_TABLE 2
1557 #define CLONEf_CLONE_HOST 4
1558 #define CLONEf_JOIN_IN 8
1560 struct clone_params {
1563 PerlInterpreter *proto_perl;
1568 * c-indentation-style: bsd
1570 * indent-tabs-mode: t
1573 * ex: set ts=8 sts=4 sw=4 noet: