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>.
65 /* Using C's structural equivalence to help emulate C++ inheritance here... */
67 struct STRUCT_SV { /* struct sv { */
68 void* sv_any; /* pointer to something */
69 U32 sv_refcnt; /* how many references to us */
70 U32 sv_flags; /* what we are */
74 SV* svu_rv; /* pointer to another SV */
75 char* svu_pv; /* pointer to malloced string */
78 #ifdef DEBUG_LEAKING_SCALARS
79 unsigned sv_debug_optype:9; /* the type of OP that allocated us */
80 unsigned sv_debug_inpad:1; /* was allocated in a pad for an OP */
81 unsigned sv_debug_cloned:1; /* was cloned for an ithread */
82 unsigned sv_debug_line:16; /* the line where we were allocated */
83 char * sv_debug_file; /* the file where we were allocated */
88 XPVGV* sv_any; /* pointer to something */
89 U32 sv_refcnt; /* how many references to us */
90 U32 sv_flags; /* what we are */
101 XPVCV* sv_any; /* pointer to something */
102 U32 sv_refcnt; /* how many references to us */
103 U32 sv_flags; /* what we are */
114 XPVAV* sv_any; /* pointer to something */
115 U32 sv_refcnt; /* how many references to us */
116 U32 sv_flags; /* what we are */
121 char* svu_pv; /* pointer to first array element */
127 XPVHV* sv_any; /* pointer to something */
128 U32 sv_refcnt; /* how many references to us */
129 U32 sv_flags; /* what we are */
140 XPVIO* sv_any; /* pointer to something */
141 U32 sv_refcnt; /* how many references to us */
142 U32 sv_flags; /* what we are */
153 =head1 SV Manipulation Functions
155 =for apidoc Am|U32|SvREFCNT|SV* sv
156 Returns the value of the object's reference count.
158 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
159 Increments the reference count of the given SV.
161 =for apidoc Am|void|SvREFCNT_dec|SV* sv
162 Decrements the reference count of the given SV.
164 =for apidoc Am|svtype|SvTYPE|SV* sv
165 Returns the type of the SV. See C<svtype>.
167 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
168 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
169 perform the upgrade if necessary. See C<svtype>.
174 #define SvANY(sv) (sv)->sv_any
175 #define SvFLAGS(sv) (sv)->sv_flags
176 #define SvREFCNT(sv) (sv)->sv_refcnt
178 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
179 # define SvREFCNT_inc(sv) \
181 SV * const _sv = (SV*)(sv); \
187 # define SvREFCNT_inc(sv) \
188 ((PL_Sv=(SV*)(sv)), (PL_Sv && ++(SvREFCNT(PL_Sv))), (SV*)PL_Sv)
191 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
192 # define SvREFCNT_dec(sv) \
194 SV * const _sv = (SV*)(sv); \
196 if (SvREFCNT(_sv)) { \
197 if (--(SvREFCNT(_sv)) == 0) \
198 Perl_sv_free2(aTHX_ _sv); \
205 #define SvREFCNT_dec(sv) sv_free((SV*)(sv))
208 #define SVTYPEMASK 0xff
209 #define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK)
211 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= (mt) || (sv_upgrade(sv, mt), 1))
213 #define SVs_PADSTALE 0x00000100 /* lexical has gone out of scope */
214 #define SVs_PADTMP 0x00000200 /* in use as tmp */
215 #define SVs_PADMY 0x00000400 /* in use a "my" variable */
216 #define SVs_TEMP 0x00000800 /* string is stealable? */
217 #define SVs_OBJECT 0x00001000 /* is "blessed" */
218 #define SVs_GMG 0x00002000 /* has magical get method */
219 #define SVs_SMG 0x00004000 /* has magical set method */
220 #define SVs_RMG 0x00008000 /* has random magical methods */
222 #define SVf_IOK 0x00010000 /* has valid public integer value */
223 #define SVf_NOK 0x00020000 /* has valid public numeric value */
224 #define SVf_POK 0x00040000 /* has valid public pointer value */
225 #define SVf_ROK 0x00080000 /* has a valid reference pointer */
227 #define SVf_FAKE 0x00100000 /* glob or lexical is just a copy */
228 #define SVf_OOK 0x00200000 /* has valid offset value
229 For a PVHV this means that a
230 hv_aux struct is present after the
232 #define SVf_BREAK 0x00400000 /* refcnt is artificially low - used
233 * by SV's in final arena cleanup */
234 #define SVf_READONLY 0x00800000 /* may not be modified */
237 #define SVp_IOK 0x01000000 /* has valid non-public integer value */
238 #define SVp_NOK 0x02000000 /* has valid non-public numeric value */
239 #define SVp_POK 0x04000000 /* has valid non-public pointer value */
240 #define SVp_SCREAM 0x08000000 /* has been studied? */
242 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded */
243 /* Ensure this value does not clash with the GV_ADD* flags in gv.h */
245 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
247 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
248 SVp_IOK|SVp_NOK|SVp_POK)
250 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
252 #define PRIVSHIFT 8 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
254 /* Some private flags. */
256 /* SVpad_OUR may be set on SVt_PV{NV,MG,GV} types */
257 #define SVpad_OUR 0x80000000 /* pad name is "our" instead of "my" */
258 #define SVpad_TYPED 0x40000000 /* Typed Lexical */
260 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
262 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
264 #define SVpbm_VALID 0x80000000
265 #define SVpbm_TAIL 0x40000000
267 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
269 #define SVphv_CLONEABLE 0x08000000 /* for stashes: clone its objects */
270 #define SVphv_REHASH 0x10000000 /* HV is recalculating hash values */
271 #define SVphv_SHAREKEYS 0x20000000 /* keys live on shared string table */
272 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
273 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
275 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
277 #define SVpav_REAL 0x40000000 /* free old entries */
278 #define SVpav_REIFY 0x80000000 /* can become real */
281 NV xnv_nv; /* numeric value, if any */
282 STRLEN xpv_cur; /* length of svu_pv as a C string */
283 STRLEN xpv_len; /* allocated size */
287 typedef struct xpv xpv_allocated;
290 STRLEN xpv_cur; /* length of svu_pv as a C string */
291 STRLEN xpv_len; /* allocated size */
296 NV xnv_nv; /* numeric value, if any */
297 STRLEN xpv_cur; /* length of svu_pv as a C string */
298 STRLEN xpv_len; /* allocated size */
300 IV xivu_iv; /* integer value or pv offset */
307 typedef struct xpviv xpviv_allocated;
310 STRLEN xpv_cur; /* length of svu_pv as a C string */
311 STRLEN xpv_len; /* allocated size */
313 IV xivu_iv; /* integer value or pv offset */
320 #define xiv_iv xiv_u.xivu_iv
323 NV xnv_nv; /* numeric value, if any */
324 STRLEN xpv_cur; /* length of svu_pv as a C string */
325 STRLEN xpv_len; /* allocated size */
328 UV xuvu_uv; /* unsigned value or pv offset */
333 #define xuv_uv xuv_u.xuvu_uv
336 NV xnv_nv; /* numeric value, if any */
337 STRLEN xpv_cur; /* length of svu_pv as a C string */
338 STRLEN xpv_len; /* allocated size */
340 IV xivu_iv; /* integer value or pv offset */
346 /* These structure must match the beginning of struct xpvhv in hv.h. */
348 NV xnv_nv; /* numeric value, if any */
349 STRLEN xpv_cur; /* length of svu_pv as a C string */
350 STRLEN xpv_len; /* allocated size */
352 IV xivu_iv; /* integer value or pv offset */
356 MAGIC* xmg_magic; /* linked list of magicalness */
357 HV* xmg_stash; /* class package */
361 NV xnv_nv; /* numeric value, if any */
362 STRLEN xpv_cur; /* length of svu_pv as a C string */
363 STRLEN xpv_len; /* allocated size */
365 IV xivu_iv; /* integer value or pv offset */
369 MAGIC* xmg_magic; /* linked list of magicalness */
370 HV* xmg_stash; /* class package */
372 /* a full glob fits into this */
382 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
383 * y=alem/helem/iter t=tie T=tied HE */
387 NV xnv_nv; /* numeric value, if any */
388 STRLEN xpv_cur; /* length of svu_pv as a C string */
389 STRLEN xpv_len; /* allocated size */
391 IV xivu_iv; /* integer value or pv offset */
395 MAGIC* xmg_magic; /* linked list of magicalness */
396 HV* xmg_stash; /* class package */
406 NV xnv_nv; /* numeric value, if any */
407 STRLEN xpv_cur; /* length of svu_pv as a C string */
408 STRLEN xpv_len; /* allocated size */
410 IV xivu_iv; /* integer value or pv offset */
414 MAGIC* xmg_magic; /* linked list of magicalness */
415 HV* xmg_stash; /* class package */
417 I32 xbm_useful; /* is this constant pattern being useful? */
418 U16 xbm_previous; /* how many characters in string before rare? */
419 U8 xbm_rare; /* rarest character in string */
422 /* This structure must match XPVCV in cv.h */
424 typedef U16 cv_flags_t;
427 NV xnv_nv; /* numeric value, if any */
428 STRLEN xpv_cur; /* length of svu_pv as a C string */
429 STRLEN xpv_len; /* allocated size */
431 IV xivu_iv; /* integer value or pv offset */
435 MAGIC* xmg_magic; /* linked list of magicalness */
436 HV* xmg_stash; /* class package */
441 void (*xcv_xsub)(pTHX_ CV*);
445 long xcv_depth; /* >= 2 indicates recursive call */
448 cv_flags_t xcv_flags;
449 U32 xcv_outside_seq; /* the COP sequence (at the point of our
450 * compilation) in the lexically enclosing
456 NV xnv_nv; /* numeric value, if any */
457 STRLEN xpv_cur; /* length of svu_pv as a C string */
458 STRLEN xpv_len; /* allocated size */
460 IV xivu_iv; /* integer value or pv offset */
464 MAGIC* xmg_magic; /* linked list of magicalness */
465 HV* xmg_stash; /* class package */
467 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
468 PerlIO * xio_ofp; /* but sockets need separate streams */
469 /* Cray addresses everything by word boundaries (64 bits) and
470 * code and data pointers cannot be mixed (which is exactly what
471 * Perl_filter_add() tries to do with the dirp), hence the following
472 * union trick (as suggested by Gurusamy Sarathy).
473 * For further information see Geir Johansen's problem report titled
474 [ID 20000612.002] Perl problem on Cray system
475 * The any pointer (known as IoANY()) will also be a good place
476 * to hang any IO disciplines to.
479 DIR * xiou_dirp; /* for opendir, readdir, etc */
480 void * xiou_any; /* for alignment */
482 IV xio_lines; /* $. */
483 IV xio_page; /* $% */
484 IV xio_page_len; /* $= */
485 IV xio_lines_left; /* $- */
486 char * xio_top_name; /* $^ */
487 GV * xio_top_gv; /* $^ */
488 char * xio_fmt_name; /* $~ */
489 GV * xio_fmt_gv; /* $~ */
490 char * xio_bottom_name;/* $^B */
491 GV * xio_bottom_gv; /* $^B */
492 short xio_subprocess; /* -| or |- */
496 #define xio_dirp xio_dirpu.xiou_dirp
497 #define xio_any xio_dirpu.xiou_any
499 #define IOf_ARGV 1 /* this fp iterates over ARGV */
500 #define IOf_START 2 /* check for null ARGV and substitute '-' */
501 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
502 #define IOf_DIDTOP 8 /* just did top of form */
503 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
504 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
505 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
507 /* The following macros define implementation-independent predicates on SVs. */
510 =for apidoc Am|bool|SvNIOK|SV* sv
511 Returns a boolean indicating whether the SV contains a number, integer or
514 =for apidoc Am|bool|SvNIOKp|SV* sv
515 Returns a boolean indicating whether the SV contains a number, integer or
516 double. Checks the B<private> setting. Use C<SvNIOK>.
518 =for apidoc Am|void|SvNIOK_off|SV* sv
519 Unsets the NV/IV status of an SV.
521 =for apidoc Am|bool|SvOK|SV* sv
522 Returns a boolean indicating whether the value is an SV. It also tells
523 whether the value is defined or not.
525 =for apidoc Am|bool|SvIOKp|SV* sv
526 Returns a boolean indicating whether the SV contains an integer. Checks
527 the B<private> setting. Use C<SvIOK>.
529 =for apidoc Am|bool|SvNOKp|SV* sv
530 Returns a boolean indicating whether the SV contains a double. Checks the
531 B<private> setting. Use C<SvNOK>.
533 =for apidoc Am|bool|SvPOKp|SV* sv
534 Returns a boolean indicating whether the SV contains a character string.
535 Checks the B<private> setting. Use C<SvPOK>.
537 =for apidoc Am|bool|SvIOK|SV* sv
538 Returns a boolean indicating whether the SV contains an integer.
540 =for apidoc Am|void|SvIOK_on|SV* sv
541 Tells an SV that it is an integer.
543 =for apidoc Am|void|SvIOK_off|SV* sv
544 Unsets the IV status of an SV.
546 =for apidoc Am|void|SvIOK_only|SV* sv
547 Tells an SV that it is an integer and disables all other OK bits.
549 =for apidoc Am|void|SvIOK_only_UV|SV* sv
550 Tells and SV that it is an unsigned integer and disables all other OK bits.
552 =for apidoc Am|bool|SvIOK_UV|SV* sv
553 Returns a boolean indicating whether the SV contains an unsigned integer.
555 =for apidoc Am|void|SvUOK|SV* sv
556 Returns a boolean indicating whether the SV contains an unsigned integer.
558 =for apidoc Am|bool|SvIOK_notUV|SV* sv
559 Returns a boolean indicating whether the SV contains a signed integer.
561 =for apidoc Am|bool|SvNOK|SV* sv
562 Returns a boolean indicating whether the SV contains a double.
564 =for apidoc Am|void|SvNOK_on|SV* sv
565 Tells an SV that it is a double.
567 =for apidoc Am|void|SvNOK_off|SV* sv
568 Unsets the NV status of an SV.
570 =for apidoc Am|void|SvNOK_only|SV* sv
571 Tells an SV that it is a double and disables all other OK bits.
573 =for apidoc Am|bool|SvPOK|SV* sv
574 Returns a boolean indicating whether the SV contains a character
577 =for apidoc Am|void|SvPOK_on|SV* sv
578 Tells an SV that it is a string.
580 =for apidoc Am|void|SvPOK_off|SV* sv
581 Unsets the PV status of an SV.
583 =for apidoc Am|void|SvPOK_only|SV* sv
584 Tells an SV that it is a string and disables all other OK bits.
585 Will also turn off the UTF-8 status.
587 =for apidoc Am|bool|SvVOK|SV* sv
588 Returns a boolean indicating whether the SV contains a v-string.
590 =for apidoc Am|bool|SvOOK|SV* sv
591 Returns a boolean indicating whether the SvIVX is a valid offset value for
592 the SvPVX. This hack is used internally to speed up removal of characters
593 from the beginning of a SvPV. When SvOOK is true, then the start of the
594 allocated string buffer is really (SvPVX - SvIVX).
596 =for apidoc Am|bool|SvROK|SV* sv
597 Tests if the SV is an RV.
599 =for apidoc Am|void|SvROK_on|SV* sv
600 Tells an SV that it is an RV.
602 =for apidoc Am|void|SvROK_off|SV* sv
603 Unsets the RV status of an SV.
605 =for apidoc Am|SV*|SvRV|SV* sv
606 Dereferences an RV to return the SV.
608 =for apidoc Am|IV|SvIVX|SV* sv
609 Returns the raw value in the SV's IV slot, without checks or conversions.
610 Only use when you are sure SvIOK is true. See also C<SvIV()>.
612 =for apidoc Am|UV|SvUVX|SV* sv
613 Returns the raw value in the SV's UV slot, without checks or conversions.
614 Only use when you are sure SvIOK is true. See also C<SvUV()>.
616 =for apidoc Am|NV|SvNVX|SV* sv
617 Returns the raw value in the SV's NV slot, without checks or conversions.
618 Only use when you are sure SvNOK is true. See also C<SvNV()>.
620 =for apidoc Am|char*|SvPVX|SV* sv
621 Returns a pointer to the physical string in the SV. The SV must contain a
624 =for apidoc Am|STRLEN|SvCUR|SV* sv
625 Returns the length of the string which is in the SV. See C<SvLEN>.
627 =for apidoc Am|STRLEN|SvLEN|SV* sv
628 Returns the size of the string buffer in the SV, not including any part
629 attributable to C<SvOOK>. See C<SvCUR>.
631 =for apidoc Am|char*|SvEND|SV* sv
632 Returns a pointer to the last character in the string which is in the SV.
633 See C<SvCUR>. Access the character as *(SvEND(sv)).
635 =for apidoc Am|HV*|SvSTASH|SV* sv
636 Returns the stash of the SV.
638 =for apidoc Am|void|SvIV_set|SV* sv|IV val
639 Set the value of the IV pointer in sv to val. It is possible to perform
640 the same function of this macro with an lvalue assignment to C<SvIVX>.
641 With future Perls, however, it will be more efficient to use
642 C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
644 =for apidoc Am|void|SvNV_set|SV* sv|NV val
645 Set the value of the NV pointer in sv to val. See C<SvIV_set>.
647 =for apidoc Am|void|SvPV_set|SV* sv|char* val
648 Set the value of the PV pointer in sv to val. See C<SvIV_set>.
650 =for apidoc Am|void|SvUV_set|SV* sv|UV val
651 Set the value of the UV pointer in sv to val. See C<SvIV_set>.
653 =for apidoc Am|void|SvRV_set|SV* sv|SV* val
654 Set the value of the RV pointer in sv to val. See C<SvIV_set>.
656 =for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
657 Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>.
659 =for apidoc Am|void|SvSTASH_set|SV* sv|STASH* val
660 Set the value of the STASH pointer in sv to val. See C<SvIV_set>.
662 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
663 Set the current length of the string which is in the SV. See C<SvCUR>
666 =for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
667 Set the actual length of the string which is in the SV. See C<SvIV_set>.
672 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
673 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
674 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
675 SVp_IOK|SVp_NOK|SVf_IVisUV))
677 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
678 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
680 #define assert_not_ROK(sv)
683 #define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
684 #define SvOK_off(sv) (assert_not_ROK(sv) \
685 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
686 SVf_IVisUV|SVf_UTF8), \
688 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
689 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
693 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
694 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
695 #define SvIOKp_on(sv) (SvRELEASE_IVX(sv), \
696 SvFLAGS(sv) |= SVp_IOK)
697 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
698 #define SvNOKp_on(sv) (SvFLAGS(sv) |= SVp_NOK)
699 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
700 #define SvPOKp_on(sv) (assert_not_ROK(sv) \
701 SvFLAGS(sv) |= SVp_POK)
703 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
704 #define SvIOK_on(sv) (SvRELEASE_IVX(sv), \
705 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
706 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
707 #define SvIOK_only(sv) (SvOK_off(sv), \
708 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
709 #define SvIOK_only_UV(sv) (SvOK_off_exc_UV(sv), \
710 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
712 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
713 == (SVf_IOK|SVf_IVisUV))
714 #define SvUOK(sv) SvIOK_UV(sv)
715 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
718 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
719 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
720 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
722 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
723 #define SvNOK_on(sv) (SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
724 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
725 #define SvNOK_only(sv) (SvOK_off(sv), \
726 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
729 =for apidoc Am|bool|SvUTF8|SV* sv
730 Returns a boolean indicating whether the SV contains UTF-8 encoded data.
732 =for apidoc Am|void|SvUTF8_on|SV *sv
733 Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
734 Do not use frivolously.
736 =for apidoc Am|void|SvUTF8_off|SV *sv
737 Unsets the UTF-8 status of an SV.
739 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
740 Tells an SV that it is a string and disables all other OK bits,
741 and leaves the UTF-8 status as it was.
746 /* Ensure the return value of this macro does not clash with the GV_ADD* flags
748 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
749 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
750 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
752 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
753 #define SvPOK_on(sv) (assert_not_ROK(sv) \
754 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
755 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
756 #define SvPOK_only(sv) (assert_not_ROK(sv) \
757 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
758 SVf_IVisUV|SVf_UTF8), \
759 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
760 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) \
761 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
763 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
765 #define SvVOK(sv) (SvMAGICAL(sv) && mg_find(sv,'V'))
766 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
767 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
768 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
770 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
771 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
772 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
774 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
775 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
776 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVf_AMAGIC))
778 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
779 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
780 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
782 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
783 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
784 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
786 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
787 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
788 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
790 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
791 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
792 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
794 #define SvAMAGIC(sv) (SvFLAGS(sv) & SVf_AMAGIC)
795 #define SvAMAGIC_on(sv) (SvFLAGS(sv) |= SVf_AMAGIC)
796 #define SvAMAGIC_off(sv) (SvFLAGS(sv) &= ~SVf_AMAGIC)
798 #define SvGAMAGIC(sv) (SvFLAGS(sv) & (SVs_GMG|SVf_AMAGIC))
801 #define Gv_AMG(stash) \
802 (HV_AMAGICmb(stash) && \
803 ((!HV_AMAGICbad(stash) && HV_AMAGIC(stash)) || Gv_AMupdate(stash)))
805 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
807 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
808 == (SVf_ROK|SVprv_WEAKREF))
809 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
810 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
812 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
814 #define SvPADSTALE(sv) (SvFLAGS(sv) & SVs_PADSTALE)
815 #define SvPADSTALE_on(sv) (SvFLAGS(sv) |= SVs_PADSTALE)
816 #define SvPADSTALE_off(sv) (SvFLAGS(sv) &= ~SVs_PADSTALE)
818 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
819 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
820 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
822 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
823 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY)
825 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
826 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
827 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
829 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
830 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
831 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
833 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
834 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
835 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
837 #define SvSCREAM(sv) (SvFLAGS(sv) & SVp_SCREAM)
838 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
839 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
841 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
842 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
843 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
845 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
846 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
847 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
849 #define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL)
850 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
851 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
853 #define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
854 #define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
855 #define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
858 /* The following uses the FAKE flag to show that a regex pointer is infact
859 its own offset in the regexpad for ithreads */
860 #define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
861 #define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
862 #define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
865 #ifdef PERL_DEBUG_COW
866 #define SvRV(sv) (0 + (sv)->sv_u.svu_rv)
868 #define SvRV(sv) ((sv)->sv_u.svu_rv)
870 #define SvRVx(sv) SvRV(sv)
872 #ifdef PERL_DEBUG_COW
873 /* Need -0.0 for SvNVX to preserve IEEE FP "negative zero" because
874 +0.0 + -0.0 => +0.0 but -0.0 + -0.0 => -0.0 */
875 # define SvIVX(sv) (0 + ((XPVIV*) SvANY(sv))->xiv_iv)
876 # define SvUVX(sv) (0 + ((XPVUV*) SvANY(sv))->xuv_uv)
877 # define SvNVX(sv) (-0.0 + ((XPVNV*) SvANY(sv))->xnv_nv)
878 /* Don't test the core XS code yet. */
879 # if defined (PERL_CORE) && PERL_DEBUG_COW > 1
880 # define SvPVX(sv) (0 + (assert(!SvREADONLY(sv)), (sv)->sv_u.svu_pv))
882 # define SvPVX(sv) SvPVX_mutable(sv)
884 # define SvPVX_mutable(sv) (0 + (sv)->sv_u.svu_pv)
885 # define SvPVX_const(sv) ((const char*)(0 + (sv)->sv_u.svu_pv))
886 # define SvCUR(sv) (0 + ((XPV*) SvANY(sv))->xpv_cur)
887 # define SvLEN(sv) (0 + ((XPV*) SvANY(sv))->xpv_len)
888 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
892 /* Can't make this RVALUE because of Perl_sv_unmagic. */
893 # define SvMAGIC(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
895 # define SvMAGIC(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
897 # define SvSTASH(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
900 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
902 # define SvMAGIC(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_magic)
904 # define SvSTASH(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_stash)
907 # define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
908 # define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
909 # define SvNVX(sv) ((XPVNV*) SvANY(sv))->xnv_nv
910 # define SvPVX(sv) ((sv)->sv_u.svu_pv)
911 # define SvPVX_mutable(sv) SvPVX(sv)
912 # define SvPVX_const(sv) ((const char*)SvPVX(sv))
913 # define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
914 # define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
915 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
918 # define SvMAGIC(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
919 # define SvSTASH(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
921 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
922 # define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
926 #define SvIVXx(sv) SvIVX(sv)
927 #define SvUVXx(sv) SvUVX(sv)
928 #define SvNVXx(sv) SvNVX(sv)
929 #define SvPVXx(sv) SvPVX(sv)
930 #define SvLENx(sv) SvLEN(sv)
931 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
934 /* Ask a scalar nicely to try to become an IV, if possible.
935 Not guaranteed to stay returning void */
936 /* Macro won't actually call sv_2iv if already IOK */
937 #define SvIV_please(sv) \
938 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
939 (void) SvIV(sv); } STMT_END
940 #define SvIV_set(sv, val) \
941 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
942 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
943 #define SvNV_set(sv, val) \
944 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
945 assert(SvTYPE(sv) != SVt_PVAV); assert(SvTYPE(sv) != SVt_PVHV); \
946 (((XPVNV*)SvANY(sv))->xnv_nv = (val)); } STMT_END
947 #define SvPV_set(sv, val) \
948 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
949 ((sv)->sv_u.svu_pv = (val)); } STMT_END
950 #define SvUV_set(sv, val) \
951 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
952 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
953 #define SvRV_set(sv, val) \
954 STMT_START { assert(SvTYPE(sv) >= SVt_RV); \
955 ((sv)->sv_u.svu_rv = (val)); } STMT_END
956 #define SvMAGIC_set(sv, val) \
957 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
958 (((XPVMG*)SvANY(sv))->xmg_magic = (val)); } STMT_END
959 #define SvSTASH_set(sv, val) \
960 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
961 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
962 #define SvCUR_set(sv, val) \
963 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
964 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
965 #define SvLEN_set(sv, val) \
966 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
967 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
968 #define SvEND_set(sv, val) \
969 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
970 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
972 #define SvPV_renew(sv,n) \
973 STMT_START { SvLEN_set(sv, n); \
974 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
975 (char*)saferealloc((Malloc_t)SvPVX(sv), \
976 (MEM_SIZE)((n))))); \
979 #define SvPV_shrink_to_cur(sv) STMT_START { \
980 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
981 SvPV_renew(sv, _lEnGtH); \
984 #define SvPV_free(sv) \
986 assert(SvTYPE(sv) >= SVt_PV); \
989 SvPV_set(sv, SvPVX_mutable(sv) - SvIVX(sv)); \
990 SvFLAGS(sv) &= ~SVf_OOK; \
992 Safefree(SvPVX(sv)); \
996 #define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
997 #define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
998 #define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
1000 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
1002 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
1003 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
1004 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
1005 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
1007 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
1008 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
1009 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
1010 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
1011 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
1012 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
1013 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
1014 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
1015 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
1016 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
1017 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
1018 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
1019 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
1020 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
1021 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
1022 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1023 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1025 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
1026 #define IoTYPE_RDONLY '<'
1027 #define IoTYPE_WRONLY '>'
1028 #define IoTYPE_RDWR '+'
1029 #define IoTYPE_APPEND 'a'
1030 #define IoTYPE_PIPE '|'
1031 #define IoTYPE_STD '-' /* stdin or stdout */
1032 #define IoTYPE_SOCKET 's'
1033 #define IoTYPE_CLOSED ' '
1034 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1035 #define IoTYPE_NUMERIC '#' /* fdopen */
1038 =for apidoc Am|bool|SvTAINTED|SV* sv
1039 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
1042 =for apidoc Am|void|SvTAINTED_on|SV* sv
1043 Marks an SV as tainted if tainting is enabled.
1045 =for apidoc Am|void|SvTAINTED_off|SV* sv
1046 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1047 some of Perl's fundamental security features. XS module authors should not
1048 use this function unless they fully understand all the implications of
1049 unconditionally untainting the value. Untainting should be done in the
1050 standard perl fashion, via a carefully crafted regexp, rather than directly
1051 untainting variables.
1053 =for apidoc Am|void|SvTAINT|SV* sv
1054 Taints an SV if tainting is enabled.
1059 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1060 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
1061 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
1063 #define SvTAINT(sv) \
1065 if (PL_tainting) { \
1072 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
1073 Like C<SvPV> but will force the SV into containing just a string
1074 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1077 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
1078 Like C<SvPV> but will force the SV into containing just a string
1079 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1080 directly. Doesn't process magic.
1082 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
1083 Returns a pointer to the string in the SV, or a stringified form of
1084 the SV if the SV does not contain a string. The SV may cache the
1085 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
1086 C<SvPVx> for a version which guarantees to evaluate sv only once.
1088 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
1089 A version of C<SvPV> which guarantees to evaluate sv only once.
1091 =for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1092 Like C<SvPV> but doesn't process magic.
1094 =for apidoc Am|char*|SvPV_nolen|SV* sv
1095 Returns a pointer to the string in the SV, or a stringified form of
1096 the SV if the SV does not contain a string. The SV may cache the
1097 stringified form becoming C<SvPOK>. Handles 'get' magic.
1099 =for apidoc Am|IV|SvIV|SV* sv
1100 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
1101 version which guarantees to evaluate sv only once.
1103 =for apidoc Am|IV|SvIV_nomg|SV* sv
1104 Like C<SvIV> but doesn't process magic.
1106 =for apidoc Am|IV|SvIVx|SV* sv
1107 Coerces the given SV to an integer and returns it. Guarantees to evaluate
1108 sv only once. Use the more efficient C<SvIV> otherwise.
1110 =for apidoc Am|NV|SvNV|SV* sv
1111 Coerce the given SV to a double and return it. See C<SvNVx> for a version
1112 which guarantees to evaluate sv only once.
1114 =for apidoc Am|NV|SvNVx|SV* sv
1115 Coerces the given SV to a double and returns it. Guarantees to evaluate
1116 sv only once. Use the more efficient C<SvNV> otherwise.
1118 =for apidoc Am|UV|SvUV|SV* sv
1119 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
1120 for a version which guarantees to evaluate sv only once.
1122 =for apidoc Am|UV|SvUV_nomg|SV* sv
1123 Like C<SvUV> but doesn't process magic.
1125 =for apidoc Am|UV|SvUVx|SV* sv
1126 Coerces the given SV to an unsigned integer and returns it. Guarantees to
1127 evaluate sv only once. Use the more efficient C<SvUV> otherwise.
1129 =for apidoc Am|bool|SvTRUE|SV* sv
1130 Returns a boolean indicating whether Perl would evaluate the SV as true or
1131 false, defined or undefined. Does not handle 'get' magic.
1133 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
1134 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1136 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
1137 Like C<SvPV>, but converts sv to utf8 first if necessary.
1139 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1140 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
1142 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1143 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1145 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1146 Like C<SvPV>, but converts sv to byte representation first if necessary.
1148 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1149 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1151 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1152 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1153 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1156 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1157 Like C<SvPV>, but converts sv to utf8 first if necessary.
1158 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1161 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1162 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1163 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1166 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1167 Like C<SvPV>, but converts sv to byte representation first if necessary.
1168 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1171 =for apidoc Am|bool|SvIsCOW|SV* sv
1172 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1173 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1176 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1177 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1180 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1181 Like C<sv_catpvn> but doesn't process magic.
1183 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1184 Like C<sv_setsv> but doesn't process magic.
1186 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1187 Like C<sv_catsv> but doesn't process magic.
1192 /* Let us hope that bitmaps for UV and IV are the same */
1193 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1194 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1195 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1197 #define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1198 #define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1202 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1203 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1204 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1206 #define SvPV_flags(sv, lp, flags) \
1207 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1208 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1209 #define SvPV_flags_const(sv, lp, flags) \
1210 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1211 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1212 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1213 #define SvPV_flags_mutable(sv, lp, flags) \
1214 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1215 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1216 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1218 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1219 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1220 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1222 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1224 #define SvPV_force_flags(sv, lp, flags) \
1225 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1226 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1227 #define SvPV_force_flags_nolen(sv, flags) \
1228 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1229 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1230 #define SvPV_force_flags_mutable(sv, lp, flags) \
1231 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1232 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1233 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1235 #define SvPV_nolen(sv) \
1236 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1237 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1239 #define SvPV_nolen_const(sv) \
1240 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1241 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1243 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1244 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1248 #define SvPVutf8(sv, lp) \
1249 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1250 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1252 #define SvPVutf8_force(sv, lp) \
1253 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1254 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1257 #define SvPVutf8_nolen(sv) \
1258 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1259 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1263 #define SvPVbyte(sv, lp) \
1264 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1265 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1267 #define SvPVbyte_force(sv, lp) \
1268 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1269 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1271 #define SvPVbyte_nolen(sv) \
1272 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1273 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1277 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1278 * var to evaluate the arg once; failing that, use a global if possible;
1279 * failing that, call a function to do the work
1282 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1283 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1284 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1286 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1288 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1289 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1290 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1291 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1292 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1293 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1294 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1295 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1296 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1297 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1298 # define SvTRUE(sv) ( \
1302 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1304 (nxpv->xpv_cur > 1 || \
1305 (nxpv->xpv_cur && *(sv)->sv_u.svu_pv != '0')); }) \
1312 ? SvNVX(sv) != 0.0 \
1314 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1316 #else /* __GNUC__ */
1318 /* These inlined macros use globals, which will require a thread
1319 * declaration in user code, so we avoid them under threads */
1321 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1322 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1323 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1324 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1325 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1326 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1327 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1328 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1329 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1330 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1331 # define SvTRUE(sv) ( \
1335 ? ((PL_Xpv = (XPV*)SvANY(PL_Sv = (sv))) && \
1336 (PL_Xpv->xpv_cur > 1 || \
1337 (PL_Xpv->xpv_cur && *PL_Sv->sv_u.svu_pv != '0')) \
1344 ? SvNVX(sv) != 0.0 \
1346 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1347 #endif /* __GNU__ */
1349 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1350 (SVf_FAKE | SVf_READONLY))
1351 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1353 #define SvSHARED_HEK_FROM_PV(pvx) \
1354 ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
1355 #define SvSHARED_HASH(sv) (0 + SvSHARED_HEK_FROM_PV(SvPVX_const(sv))->hek_hash)
1357 /* flag values for sv_*_flags functions */
1358 #define SV_IMMEDIATE_UNREF 1
1360 #define SV_COW_DROP_PV 4
1361 #define SV_UTF8_NO_ENCODING 8
1362 #define SV_NOSTEAL 16
1363 #define SV_CONST_RETURN 32
1364 #define SV_MUTABLE_RETURN 64
1366 /* We are about to replace the SV's current value. So if it's copy on write
1367 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1368 the value is about to get thrown away, so drop the PV rather than go to
1369 the effort of making a read-write copy only for it to get immediately
1372 #define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1373 sv_force_normal_flags(sv, SV_COW_DROP_PV)
1375 #ifdef PERL_OLD_COPY_ON_WRITE
1376 # define SvRELEASE_IVX(sv) ((void)((SvFLAGS(sv) & (SVf_OOK|SVf_READONLY|SVf_FAKE)) \
1377 && Perl_sv_release_IVX(aTHX_ sv)))
1378 # define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
1380 # define SvRELEASE_IVX(sv) SvOOK_off(sv)
1381 #endif /* PERL_OLD_COPY_ON_WRITE */
1383 #define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1384 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1385 SVf_OOK|SVf_BREAK|SVf_READONLY|SVf_AMAGIC)
1386 #define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1388 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1389 sv_force_normal_flags(sv, 0)
1392 /* all these 'functions' are now just macros */
1394 #define sv_pv(sv) SvPV_nolen(sv)
1395 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1396 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1398 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1399 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1400 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1401 #define sv_setsv(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_GMAGIC)
1402 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, 0)
1403 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1404 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1405 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1406 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1407 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1408 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1409 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1410 #define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1411 #define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
1413 /* Should be named SvCatPVN_utf8_upgrade? */
1414 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1417 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1419 sv_setpvn(nsv, sstr, slen); \
1421 sv_utf8_upgrade(nsv); \
1422 sv_catsv(dsv, nsv); \
1426 =for apidoc Am|SV*|newRV_inc|SV* sv
1428 Creates an RV wrapper for an SV. The reference count for the original SV is
1434 #define newRV_inc(sv) newRV(sv)
1436 /* the following macros update any magic values this sv is associated with */
1439 =head1 Magical Functions
1441 =for apidoc Am|void|SvGETMAGIC|SV* sv
1442 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1443 argument more than once.
1445 =for apidoc Am|void|SvSETMAGIC|SV* sv
1446 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1447 argument more than once.
1449 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1450 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1453 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1454 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1455 ssv. May evaluate arguments more than once.
1457 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1458 Like C<SvSetSV>, but does any set magic required afterwards.
1460 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1461 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1463 =for apidoc Am|void|SvSHARE|SV* sv
1464 Arranges for sv to be shared between threads if a suitable module
1467 =for apidoc Am|void|SvLOCK|SV* sv
1468 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1471 =for apidoc Am|void|SvUNLOCK|SV* sv
1472 Releases a mutual exclusion lock on sv if a suitable module
1475 =head1 SV Manipulation Functions
1477 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1478 Expands the character buffer in the SV so that it has room for the
1479 indicated number of bytes (remember to reserve space for an extra trailing
1480 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1481 Returns a pointer to the character buffer.
1486 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1487 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1488 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1490 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1491 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1493 #define SvSetSV_and(dst,src,finally) \
1495 if ((dst) != (src)) { \
1496 sv_setsv(dst, src); \
1500 #define SvSetSV_nosteal_and(dst,src,finally) \
1502 if ((dst) != (src)) { \
1503 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL); \
1508 #define SvSetSV(dst,src) \
1509 SvSetSV_and(dst,src,/*nothing*/;)
1510 #define SvSetSV_nosteal(dst,src) \
1511 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1513 #define SvSetMagicSV(dst,src) \
1514 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1515 #define SvSetMagicSV_nosteal(dst,src) \
1516 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1519 #if !defined(SKIP_DEBUGGING)
1520 #define SvPEEK(sv) sv_peek(sv)
1522 #define SvPEEK(sv) ""
1525 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1527 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1529 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1531 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1532 #define SvGROW_mutable(sv,len) \
1533 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
1534 #define Sv_Grow sv_grow
1536 #define CLONEf_COPY_STACKS 1
1537 #define CLONEf_KEEP_PTR_TABLE 2
1538 #define CLONEf_CLONE_HOST 4
1539 #define CLONEf_JOIN_IN 8
1541 struct clone_params {
1544 PerlInterpreter *proto_perl;
1549 * c-indentation-style: bsd
1551 * indent-tabs-mode: t
1554 * ex: set ts=8 sts=4 sw=4 noet: