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>.
66 /* typedefs to eliminate some typing */
68 typedef struct hek HEK;
70 /* Using C's structural equivalence to help emulate C++ inheritance here... */
72 /* start with 2 sv-head building blocks */
73 #define _SV_HEAD(ptrtype) \
74 ptrtype sv_any; /* pointer to body */ \
75 U32 sv_refcnt; /* how many references to us */ \
76 U32 sv_flags /* what we are */
78 #define _SV_HEAD_UNION \
82 SV* svu_rv; /* pointer to another SV */ \
83 char* svu_pv; /* pointer to malloced string */ \
89 struct STRUCT_SV { /* struct sv { */
92 #ifdef DEBUG_LEAKING_SCALARS
93 unsigned sv_debug_optype:9; /* the type of OP that allocated us */
94 unsigned sv_debug_inpad:1; /* was allocated in a pad for an OP */
95 unsigned sv_debug_cloned:1; /* was cloned for an ithread */
96 unsigned sv_debug_line:16; /* the line where we were allocated */
97 char * sv_debug_file; /* the file where we were allocated */
102 _SV_HEAD(XPVGV*); /* pointer to xpvgv body */
107 _SV_HEAD(XPVCV*); /* pointer to xpvcv body */
112 _SV_HEAD(XPVAV*); /* pointer to xpvcv body */
117 _SV_HEAD(XPVHV*); /* pointer to xpvhv body */
122 _SV_HEAD(XPVIO*); /* pointer to xpvio body */
127 #undef _SV_HEAD_UNION /* insure no pollution */
130 =head1 SV Manipulation Functions
132 =for apidoc Am|U32|SvREFCNT|SV* sv
133 Returns the value of the object's reference count.
135 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
136 Increments the reference count of the given SV.
138 =for apidoc Am|void|SvREFCNT_dec|SV* sv
139 Decrements the reference count of the given SV.
141 =for apidoc Am|svtype|SvTYPE|SV* sv
142 Returns the type of the SV. See C<svtype>.
144 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
145 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
146 perform the upgrade if necessary. See C<svtype>.
151 #define SvANY(sv) (sv)->sv_any
152 #define SvFLAGS(sv) (sv)->sv_flags
153 #define SvREFCNT(sv) (sv)->sv_refcnt
155 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
156 # define SvREFCNT_inc(sv) \
158 SV * const _sv = (SV*)(sv); \
164 # define SvREFCNT_inc(sv) \
165 ((PL_Sv=(SV*)(sv)), (PL_Sv && ++(SvREFCNT(PL_Sv))), (SV*)PL_Sv)
168 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
169 # define SvREFCNT_dec(sv) \
171 SV * const _sv = (SV*)(sv); \
173 if (SvREFCNT(_sv)) { \
174 if (--(SvREFCNT(_sv)) == 0) \
175 Perl_sv_free2(aTHX_ _sv); \
182 #define SvREFCNT_dec(sv) sv_free((SV*)(sv))
185 #define SVTYPEMASK 0xff
186 #define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK)
188 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= (mt) || (sv_upgrade(sv, mt), 1))
190 #define SVs_PADSTALE 0x00000100 /* lexical has gone out of scope */
191 #define SVs_PADTMP 0x00000200 /* in use as tmp */
192 #define SVs_PADMY 0x00000400 /* in use a "my" variable */
193 #define SVs_TEMP 0x00000800 /* string is stealable? */
194 #define SVs_OBJECT 0x00001000 /* is "blessed" */
195 #define SVs_GMG 0x00002000 /* has magical get method */
196 #define SVs_SMG 0x00004000 /* has magical set method */
197 #define SVs_RMG 0x00008000 /* has random magical methods */
199 #define SVf_IOK 0x00010000 /* has valid public integer value */
200 #define SVf_NOK 0x00020000 /* has valid public numeric value */
201 #define SVf_POK 0x00040000 /* has valid public pointer value */
202 #define SVf_ROK 0x00080000 /* has a valid reference pointer */
204 #define SVf_FAKE 0x00100000 /* glob or lexical is just a copy */
205 #define SVf_OOK 0x00200000 /* has valid offset value
206 For a PVHV this means that a
207 hv_aux struct is present after the
209 #define SVf_BREAK 0x00400000 /* refcnt is artificially low - used
210 * by SV's in final arena cleanup */
211 #define SVf_READONLY 0x00800000 /* may not be modified */
214 #define SVp_IOK 0x01000000 /* has valid non-public integer value */
215 #define SVp_NOK 0x02000000 /* has valid non-public numeric value */
216 #define SVp_POK 0x04000000 /* has valid non-public pointer value */
217 #define SVp_SCREAM 0x08000000 /* has been studied? */
219 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded */
220 /* Ensure this value does not clash with the GV_ADD* flags in gv.h */
222 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
224 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
225 SVp_IOK|SVp_NOK|SVp_POK)
227 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
229 #define PRIVSHIFT 8 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
231 /* Some private flags. */
233 /* SVpad_OUR may be set on SVt_PV{NV,MG,GV} types */
234 #define SVpad_OUR 0x80000000 /* pad name is "our" instead of "my" */
235 #define SVpad_TYPED 0x40000000 /* Typed Lexical */
237 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
239 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
241 #define SVpbm_VALID 0x80000000
242 #define SVpbm_TAIL 0x40000000
244 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
246 #define SVphv_CLONEABLE 0x08000000 /* for stashes: clone its objects */
247 #define SVphv_REHASH 0x10000000 /* HV is recalculating hash values */
248 #define SVphv_SHAREKEYS 0x20000000 /* keys live on shared string table */
249 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
250 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
252 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
254 #define SVpav_REAL 0x40000000 /* free old entries */
255 #define SVpav_REIFY 0x80000000 /* can become real */
258 NV xnv_nv; /* numeric value, if any */
259 STRLEN xpv_cur; /* length of svu_pv as a C string */
260 STRLEN xpv_len; /* allocated size */
264 typedef struct xpv xpv_allocated;
267 STRLEN xpv_cur; /* length of svu_pv as a C string */
268 STRLEN xpv_len; /* allocated size */
273 NV xnv_nv; /* numeric value, if any */
274 STRLEN xpv_cur; /* length of svu_pv as a C string */
275 STRLEN xpv_len; /* allocated size */
277 IV xivu_iv; /* integer value or pv offset */
284 typedef struct xpviv xpviv_allocated;
287 STRLEN xpv_cur; /* length of svu_pv as a C string */
288 STRLEN xpv_len; /* allocated size */
290 IV xivu_iv; /* integer value or pv offset */
297 #define xiv_iv xiv_u.xivu_iv
300 NV xnv_nv; /* numeric value, if any */
301 STRLEN xpv_cur; /* length of svu_pv as a C string */
302 STRLEN xpv_len; /* allocated size */
305 UV xuvu_uv; /* unsigned value or pv offset */
310 #define xuv_uv xuv_u.xuvu_uv
313 NV xnv_nv; /* numeric value, if any */
314 STRLEN xpv_cur; /* length of svu_pv as a C string */
315 STRLEN xpv_len; /* allocated size */
317 IV xivu_iv; /* integer value or pv offset */
323 /* These structure must match the beginning of struct xpvhv in hv.h. */
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 */
333 MAGIC* xmg_magic; /* linked list of magicalness */
334 HV* xmg_stash; /* class package */
338 NV xnv_nv; /* numeric value, if any */
339 STRLEN xpv_cur; /* length of svu_pv as a C string */
340 STRLEN xpv_len; /* allocated size */
342 IV xivu_iv; /* integer value or pv offset */
346 MAGIC* xmg_magic; /* linked list of magicalness */
347 HV* xmg_stash; /* class package */
349 /* a full glob fits into this */
359 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
360 * y=alem/helem/iter t=tie T=tied HE */
364 NV xnv_nv; /* numeric value, if any */
365 STRLEN xpv_cur; /* length of svu_pv as a C string */
366 STRLEN xpv_len; /* allocated size */
368 IV xivu_iv; /* integer value or pv offset */
372 MAGIC* xmg_magic; /* linked list of magicalness */
373 HV* xmg_stash; /* class package */
383 NV xnv_nv; /* numeric value, if any */
384 STRLEN xpv_cur; /* length of svu_pv as a C string */
385 STRLEN xpv_len; /* allocated size */
387 IV xivu_iv; /* integer value or pv offset */
391 MAGIC* xmg_magic; /* linked list of magicalness */
392 HV* xmg_stash; /* class package */
394 I32 xbm_useful; /* is this constant pattern being useful? */
395 U16 xbm_previous; /* how many characters in string before rare? */
396 U8 xbm_rare; /* rarest character in string */
399 /* This structure must match XPVCV in cv.h */
401 typedef U16 cv_flags_t;
404 NV xnv_nv; /* numeric value, if any */
405 STRLEN xpv_cur; /* length of svu_pv as a C string */
406 STRLEN xpv_len; /* allocated size */
408 IV xivu_iv; /* integer value or pv offset */
412 MAGIC* xmg_magic; /* linked list of magicalness */
413 HV* xmg_stash; /* class package */
418 void (*xcv_xsub)(pTHX_ CV*);
422 long xcv_depth; /* >= 2 indicates recursive call */
425 cv_flags_t xcv_flags;
426 U32 xcv_outside_seq; /* the COP sequence (at the point of our
427 * compilation) in the lexically enclosing
433 NV xnv_nv; /* numeric value, if any */
434 STRLEN xpv_cur; /* length of svu_pv as a C string */
435 STRLEN xpv_len; /* allocated size */
437 IV xivu_iv; /* integer value or pv offset */
441 MAGIC* xmg_magic; /* linked list of magicalness */
442 HV* xmg_stash; /* class package */
444 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
445 PerlIO * xio_ofp; /* but sockets need separate streams */
446 /* Cray addresses everything by word boundaries (64 bits) and
447 * code and data pointers cannot be mixed (which is exactly what
448 * Perl_filter_add() tries to do with the dirp), hence the following
449 * union trick (as suggested by Gurusamy Sarathy).
450 * For further information see Geir Johansen's problem report titled
451 [ID 20000612.002] Perl problem on Cray system
452 * The any pointer (known as IoANY()) will also be a good place
453 * to hang any IO disciplines to.
456 DIR * xiou_dirp; /* for opendir, readdir, etc */
457 void * xiou_any; /* for alignment */
459 IV xio_lines; /* $. */
460 IV xio_page; /* $% */
461 IV xio_page_len; /* $= */
462 IV xio_lines_left; /* $- */
463 char * xio_top_name; /* $^ */
464 GV * xio_top_gv; /* $^ */
465 char * xio_fmt_name; /* $~ */
466 GV * xio_fmt_gv; /* $~ */
467 char * xio_bottom_name;/* $^B */
468 GV * xio_bottom_gv; /* $^B */
469 short xio_subprocess; /* -| or |- */
473 #define xio_dirp xio_dirpu.xiou_dirp
474 #define xio_any xio_dirpu.xiou_any
476 #define IOf_ARGV 1 /* this fp iterates over ARGV */
477 #define IOf_START 2 /* check for null ARGV and substitute '-' */
478 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
479 #define IOf_DIDTOP 8 /* just did top of form */
480 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
481 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
482 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
484 /* The following macros define implementation-independent predicates on SVs. */
487 =for apidoc Am|bool|SvNIOK|SV* sv
488 Returns a boolean indicating whether the SV contains a number, integer or
491 =for apidoc Am|bool|SvNIOKp|SV* sv
492 Returns a boolean indicating whether the SV contains a number, integer or
493 double. Checks the B<private> setting. Use C<SvNIOK>.
495 =for apidoc Am|void|SvNIOK_off|SV* sv
496 Unsets the NV/IV status of an SV.
498 =for apidoc Am|bool|SvOK|SV* sv
499 Returns a boolean indicating whether the value is an SV. It also tells
500 whether the value is defined or not.
502 =for apidoc Am|bool|SvIOKp|SV* sv
503 Returns a boolean indicating whether the SV contains an integer. Checks
504 the B<private> setting. Use C<SvIOK>.
506 =for apidoc Am|bool|SvNOKp|SV* sv
507 Returns a boolean indicating whether the SV contains a double. Checks the
508 B<private> setting. Use C<SvNOK>.
510 =for apidoc Am|bool|SvPOKp|SV* sv
511 Returns a boolean indicating whether the SV contains a character string.
512 Checks the B<private> setting. Use C<SvPOK>.
514 =for apidoc Am|bool|SvIOK|SV* sv
515 Returns a boolean indicating whether the SV contains an integer.
517 =for apidoc Am|void|SvIOK_on|SV* sv
518 Tells an SV that it is an integer.
520 =for apidoc Am|void|SvIOK_off|SV* sv
521 Unsets the IV status of an SV.
523 =for apidoc Am|void|SvIOK_only|SV* sv
524 Tells an SV that it is an integer and disables all other OK bits.
526 =for apidoc Am|void|SvIOK_only_UV|SV* sv
527 Tells and SV that it is an unsigned integer and disables all other OK bits.
529 =for apidoc Am|bool|SvIOK_UV|SV* sv
530 Returns a boolean indicating whether the SV contains an unsigned integer.
532 =for apidoc Am|void|SvUOK|SV* sv
533 Returns a boolean indicating whether the SV contains an unsigned integer.
535 =for apidoc Am|bool|SvIOK_notUV|SV* sv
536 Returns a boolean indicating whether the SV contains a signed integer.
538 =for apidoc Am|bool|SvNOK|SV* sv
539 Returns a boolean indicating whether the SV contains a double.
541 =for apidoc Am|void|SvNOK_on|SV* sv
542 Tells an SV that it is a double.
544 =for apidoc Am|void|SvNOK_off|SV* sv
545 Unsets the NV status of an SV.
547 =for apidoc Am|void|SvNOK_only|SV* sv
548 Tells an SV that it is a double and disables all other OK bits.
550 =for apidoc Am|bool|SvPOK|SV* sv
551 Returns a boolean indicating whether the SV contains a character
554 =for apidoc Am|void|SvPOK_on|SV* sv
555 Tells an SV that it is a string.
557 =for apidoc Am|void|SvPOK_off|SV* sv
558 Unsets the PV status of an SV.
560 =for apidoc Am|void|SvPOK_only|SV* sv
561 Tells an SV that it is a string and disables all other OK bits.
562 Will also turn off the UTF-8 status.
564 =for apidoc Am|bool|SvVOK|SV* sv
565 Returns a boolean indicating whether the SV contains a v-string.
567 =for apidoc Am|bool|SvOOK|SV* sv
568 Returns a boolean indicating whether the SvIVX is a valid offset value for
569 the SvPVX. This hack is used internally to speed up removal of characters
570 from the beginning of a SvPV. When SvOOK is true, then the start of the
571 allocated string buffer is really (SvPVX - SvIVX).
573 =for apidoc Am|bool|SvROK|SV* sv
574 Tests if the SV is an RV.
576 =for apidoc Am|void|SvROK_on|SV* sv
577 Tells an SV that it is an RV.
579 =for apidoc Am|void|SvROK_off|SV* sv
580 Unsets the RV status of an SV.
582 =for apidoc Am|SV*|SvRV|SV* sv
583 Dereferences an RV to return the SV.
585 =for apidoc Am|IV|SvIVX|SV* sv
586 Returns the raw value in the SV's IV slot, without checks or conversions.
587 Only use when you are sure SvIOK is true. See also C<SvIV()>.
589 =for apidoc Am|UV|SvUVX|SV* sv
590 Returns the raw value in the SV's UV slot, without checks or conversions.
591 Only use when you are sure SvIOK is true. See also C<SvUV()>.
593 =for apidoc Am|NV|SvNVX|SV* sv
594 Returns the raw value in the SV's NV slot, without checks or conversions.
595 Only use when you are sure SvNOK is true. See also C<SvNV()>.
597 =for apidoc Am|char*|SvPVX|SV* sv
598 Returns a pointer to the physical string in the SV. The SV must contain a
601 =for apidoc Am|STRLEN|SvCUR|SV* sv
602 Returns the length of the string which is in the SV. See C<SvLEN>.
604 =for apidoc Am|STRLEN|SvLEN|SV* sv
605 Returns the size of the string buffer in the SV, not including any part
606 attributable to C<SvOOK>. See C<SvCUR>.
608 =for apidoc Am|char*|SvEND|SV* sv
609 Returns a pointer to the last character in the string which is in the SV.
610 See C<SvCUR>. Access the character as *(SvEND(sv)).
612 =for apidoc Am|HV*|SvSTASH|SV* sv
613 Returns the stash of the SV.
615 =for apidoc Am|void|SvIV_set|SV* sv|IV val
616 Set the value of the IV pointer in sv to val. It is possible to perform
617 the same function of this macro with an lvalue assignment to C<SvIVX>.
618 With future Perls, however, it will be more efficient to use
619 C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
621 =for apidoc Am|void|SvNV_set|SV* sv|NV val
622 Set the value of the NV pointer in sv to val. See C<SvIV_set>.
624 =for apidoc Am|void|SvPV_set|SV* sv|char* val
625 Set the value of the PV pointer in sv to val. See C<SvIV_set>.
627 =for apidoc Am|void|SvUV_set|SV* sv|UV val
628 Set the value of the UV pointer in sv to val. See C<SvIV_set>.
630 =for apidoc Am|void|SvRV_set|SV* sv|SV* val
631 Set the value of the RV pointer in sv to val. See C<SvIV_set>.
633 =for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
634 Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>.
636 =for apidoc Am|void|SvSTASH_set|SV* sv|STASH* val
637 Set the value of the STASH pointer in sv to val. See C<SvIV_set>.
639 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
640 Set the current length of the string which is in the SV. See C<SvCUR>
643 =for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
644 Set the actual length of the string which is in the SV. See C<SvIV_set>.
649 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
650 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
651 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
652 SVp_IOK|SVp_NOK|SVf_IVisUV))
654 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
655 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
657 #define assert_not_ROK(sv)
660 #define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
661 #define SvOK_off(sv) (assert_not_ROK(sv) \
662 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
663 SVf_IVisUV|SVf_UTF8), \
665 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
666 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
670 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
671 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
672 #define SvIOKp_on(sv) (SvRELEASE_IVX(sv), \
673 SvFLAGS(sv) |= SVp_IOK)
674 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
675 #define SvNOKp_on(sv) (SvFLAGS(sv) |= SVp_NOK)
676 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
677 #define SvPOKp_on(sv) (assert_not_ROK(sv) \
678 SvFLAGS(sv) |= SVp_POK)
680 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
681 #define SvIOK_on(sv) (SvRELEASE_IVX(sv), \
682 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
683 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
684 #define SvIOK_only(sv) (SvOK_off(sv), \
685 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
686 #define SvIOK_only_UV(sv) (SvOK_off_exc_UV(sv), \
687 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
689 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
690 == (SVf_IOK|SVf_IVisUV))
691 #define SvUOK(sv) SvIOK_UV(sv)
692 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
695 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
696 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
697 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
699 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
700 #define SvNOK_on(sv) (SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
701 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
702 #define SvNOK_only(sv) (SvOK_off(sv), \
703 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
706 =for apidoc Am|bool|SvUTF8|SV* sv
707 Returns a boolean indicating whether the SV contains UTF-8 encoded data.
709 =for apidoc Am|void|SvUTF8_on|SV *sv
710 Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
711 Do not use frivolously.
713 =for apidoc Am|void|SvUTF8_off|SV *sv
714 Unsets the UTF-8 status of an SV.
716 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
717 Tells an SV that it is a string and disables all other OK bits,
718 and leaves the UTF-8 status as it was.
723 /* Ensure the return value of this macro does not clash with the GV_ADD* flags
725 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
726 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
727 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
729 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
730 #define SvPOK_on(sv) (assert_not_ROK(sv) \
731 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
732 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
733 #define SvPOK_only(sv) (assert_not_ROK(sv) \
734 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
735 SVf_IVisUV|SVf_UTF8), \
736 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
737 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) \
738 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
740 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
742 #define SvVOK(sv) (SvMAGICAL(sv) && mg_find(sv,'V'))
743 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
744 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
745 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
747 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
748 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
749 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
751 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
752 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
753 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVf_AMAGIC))
755 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
756 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
757 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
759 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
760 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
761 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
763 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
764 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
765 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
767 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
768 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
769 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
771 #define SvAMAGIC(sv) (SvFLAGS(sv) & SVf_AMAGIC)
772 #define SvAMAGIC_on(sv) (SvFLAGS(sv) |= SVf_AMAGIC)
773 #define SvAMAGIC_off(sv) (SvFLAGS(sv) &= ~SVf_AMAGIC)
775 #define SvGAMAGIC(sv) (SvFLAGS(sv) & (SVs_GMG|SVf_AMAGIC))
778 #define Gv_AMG(stash) \
779 (HV_AMAGICmb(stash) && \
780 ((!HV_AMAGICbad(stash) && HV_AMAGIC(stash)) || Gv_AMupdate(stash)))
782 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
784 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
785 == (SVf_ROK|SVprv_WEAKREF))
786 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
787 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
789 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
791 #define SvPADSTALE(sv) (SvFLAGS(sv) & SVs_PADSTALE)
792 #define SvPADSTALE_on(sv) (SvFLAGS(sv) |= SVs_PADSTALE)
793 #define SvPADSTALE_off(sv) (SvFLAGS(sv) &= ~SVs_PADSTALE)
795 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
796 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
797 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
799 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
800 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY)
802 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
803 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
804 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
806 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
807 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
808 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
810 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
811 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
812 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
814 #define SvSCREAM(sv) (SvFLAGS(sv) & SVp_SCREAM)
815 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
816 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
818 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
819 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
820 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
822 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
823 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
824 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
826 #define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL)
827 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
828 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
830 #define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
831 #define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
832 #define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
835 /* The following uses the FAKE flag to show that a regex pointer is infact
836 its own offset in the regexpad for ithreads */
837 #define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
838 #define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
839 #define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
842 #ifdef PERL_DEBUG_COW
843 #define SvRV(sv) (0 + (sv)->sv_u.svu_rv)
845 #define SvRV(sv) ((sv)->sv_u.svu_rv)
847 #define SvRVx(sv) SvRV(sv)
849 #ifdef PERL_DEBUG_COW
850 /* Need -0.0 for SvNVX to preserve IEEE FP "negative zero" because
851 +0.0 + -0.0 => +0.0 but -0.0 + -0.0 => -0.0 */
852 # define SvIVX(sv) (0 + ((XPVIV*) SvANY(sv))->xiv_iv)
853 # define SvUVX(sv) (0 + ((XPVUV*) SvANY(sv))->xuv_uv)
854 # define SvNVX(sv) (-0.0 + ((XPVNV*) SvANY(sv))->xnv_nv)
855 /* Don't test the core XS code yet. */
856 # if defined (PERL_CORE) && PERL_DEBUG_COW > 1
857 # define SvPVX(sv) (0 + (assert(!SvREADONLY(sv)), (sv)->sv_u.svu_pv))
859 # define SvPVX(sv) SvPVX_mutable(sv)
861 # define SvCUR(sv) (0 + ((XPV*) SvANY(sv))->xpv_cur)
862 # define SvLEN(sv) (0 + ((XPV*) SvANY(sv))->xpv_len)
863 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
867 /* Can't make this RVALUE because of Perl_sv_unmagic. */
868 # define SvMAGIC(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
870 # define SvMAGIC(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
872 # define SvSTASH(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
875 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
877 # define SvMAGIC(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_magic)
879 # define SvSTASH(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_stash)
882 # define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
883 # define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
884 # define SvNVX(sv) ((XPVNV*) SvANY(sv))->xnv_nv
885 # define SvPVX(sv) ((sv)->sv_u.svu_pv)
886 # define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
887 # define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
888 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
891 # define SvMAGIC(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
892 # define SvSTASH(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
894 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
895 # define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
899 /* Given that these two are new, there can't be any existing code using them
901 #define SvPVX_mutable(sv) (0 + (sv)->sv_u.svu_pv)
902 #define SvPVX_const(sv) ((const char*)(0 + (sv)->sv_u.svu_pv))
904 #define SvIVXx(sv) SvIVX(sv)
905 #define SvUVXx(sv) SvUVX(sv)
906 #define SvNVXx(sv) SvNVX(sv)
907 #define SvPVXx(sv) SvPVX(sv)
908 #define SvLENx(sv) SvLEN(sv)
909 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
912 /* Ask a scalar nicely to try to become an IV, if possible.
913 Not guaranteed to stay returning void */
914 /* Macro won't actually call sv_2iv if already IOK */
915 #define SvIV_please(sv) \
916 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
917 (void) SvIV(sv); } STMT_END
918 #define SvIV_set(sv, val) \
919 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
920 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
921 #define SvNV_set(sv, val) \
922 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
923 assert(SvTYPE(sv) != SVt_PVAV); assert(SvTYPE(sv) != SVt_PVHV); \
924 (((XPVNV*)SvANY(sv))->xnv_nv = (val)); } STMT_END
925 #define SvPV_set(sv, val) \
926 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
927 ((sv)->sv_u.svu_pv = (val)); } STMT_END
928 #define SvUV_set(sv, val) \
929 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
930 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
931 #define SvRV_set(sv, val) \
932 STMT_START { assert(SvTYPE(sv) >= SVt_RV); \
933 ((sv)->sv_u.svu_rv = (val)); } STMT_END
934 #define SvMAGIC_set(sv, val) \
935 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
936 (((XPVMG*)SvANY(sv))->xmg_magic = (val)); } STMT_END
937 #define SvSTASH_set(sv, val) \
938 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
939 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
940 #define SvCUR_set(sv, val) \
941 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
942 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
943 #define SvLEN_set(sv, val) \
944 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
945 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
946 #define SvEND_set(sv, val) \
947 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
948 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
950 #define SvPV_renew(sv,n) \
951 STMT_START { SvLEN_set(sv, n); \
952 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
953 (char*)saferealloc((Malloc_t)SvPVX(sv), \
954 (MEM_SIZE)((n))))); \
957 #define SvPV_shrink_to_cur(sv) STMT_START { \
958 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
959 SvPV_renew(sv, _lEnGtH); \
962 #define SvPV_free(sv) \
964 assert(SvTYPE(sv) >= SVt_PV); \
967 SvPV_set(sv, SvPVX_mutable(sv) - SvIVX(sv)); \
968 SvFLAGS(sv) &= ~SVf_OOK; \
970 Safefree(SvPVX(sv)); \
974 #define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
975 #define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
976 #define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
978 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
980 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
981 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
982 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
983 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
985 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
986 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
987 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
988 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
989 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
990 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
991 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
992 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
993 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
994 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
995 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
996 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
997 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
998 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
999 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
1000 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1001 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1003 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
1004 #define IoTYPE_RDONLY '<'
1005 #define IoTYPE_WRONLY '>'
1006 #define IoTYPE_RDWR '+'
1007 #define IoTYPE_APPEND 'a'
1008 #define IoTYPE_PIPE '|'
1009 #define IoTYPE_STD '-' /* stdin or stdout */
1010 #define IoTYPE_SOCKET 's'
1011 #define IoTYPE_CLOSED ' '
1012 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1013 #define IoTYPE_NUMERIC '#' /* fdopen */
1016 =for apidoc Am|bool|SvTAINTED|SV* sv
1017 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
1020 =for apidoc Am|void|SvTAINTED_on|SV* sv
1021 Marks an SV as tainted if tainting is enabled.
1023 =for apidoc Am|void|SvTAINTED_off|SV* sv
1024 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1025 some of Perl's fundamental security features. XS module authors should not
1026 use this function unless they fully understand all the implications of
1027 unconditionally untainting the value. Untainting should be done in the
1028 standard perl fashion, via a carefully crafted regexp, rather than directly
1029 untainting variables.
1031 =for apidoc Am|void|SvTAINT|SV* sv
1032 Taints an SV if tainting is enabled.
1037 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1038 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
1039 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
1041 #define SvTAINT(sv) \
1043 if (PL_tainting) { \
1050 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
1051 Like C<SvPV> but will force the SV into containing just a string
1052 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1055 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
1056 Like C<SvPV> but will force the SV into containing just a string
1057 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1058 directly. Doesn't process magic.
1060 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
1061 Returns a pointer to the string in the SV, or a stringified form of
1062 the SV if the SV does not contain a string. The SV may cache the
1063 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
1064 C<SvPVx> for a version which guarantees to evaluate sv only once.
1066 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
1067 A version of C<SvPV> which guarantees to evaluate sv only once.
1069 =for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1070 Like C<SvPV> but doesn't process magic.
1072 =for apidoc Am|char*|SvPV_nolen|SV* sv
1073 Returns a pointer to the string in the SV, or a stringified form of
1074 the SV if the SV does not contain a string. The SV may cache the
1075 stringified form becoming C<SvPOK>. Handles 'get' magic.
1077 =for apidoc Am|IV|SvIV|SV* sv
1078 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
1079 version which guarantees to evaluate sv only once.
1081 =for apidoc Am|IV|SvIV_nomg|SV* sv
1082 Like C<SvIV> but doesn't process magic.
1084 =for apidoc Am|IV|SvIVx|SV* sv
1085 Coerces the given SV to an integer and returns it. Guarantees to evaluate
1086 sv only once. Use the more efficient C<SvIV> otherwise.
1088 =for apidoc Am|NV|SvNV|SV* sv
1089 Coerce the given SV to a double and return it. See C<SvNVx> for a version
1090 which guarantees to evaluate sv only once.
1092 =for apidoc Am|NV|SvNVx|SV* sv
1093 Coerces the given SV to a double and returns it. Guarantees to evaluate
1094 sv only once. Use the more efficient C<SvNV> otherwise.
1096 =for apidoc Am|UV|SvUV|SV* sv
1097 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
1098 for a version which guarantees to evaluate sv only once.
1100 =for apidoc Am|UV|SvUV_nomg|SV* sv
1101 Like C<SvUV> but doesn't process magic.
1103 =for apidoc Am|UV|SvUVx|SV* sv
1104 Coerces the given SV to an unsigned integer and returns it. Guarantees to
1105 evaluate sv only once. Use the more efficient C<SvUV> otherwise.
1107 =for apidoc Am|bool|SvTRUE|SV* sv
1108 Returns a boolean indicating whether Perl would evaluate the SV as true or
1109 false, defined or undefined. Does not handle 'get' magic.
1111 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
1112 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1114 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
1115 Like C<SvPV>, but converts sv to utf8 first if necessary.
1117 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1118 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
1120 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1121 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1123 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1124 Like C<SvPV>, but converts sv to byte representation first if necessary.
1126 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1127 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1129 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1130 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1131 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1134 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1135 Like C<SvPV>, but converts sv to utf8 first if necessary.
1136 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1139 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1140 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1141 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1144 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1145 Like C<SvPV>, but converts sv to byte representation first if necessary.
1146 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1149 =for apidoc Am|bool|SvIsCOW|SV* sv
1150 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1151 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1154 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1155 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1158 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1159 Like C<sv_catpvn> but doesn't process magic.
1161 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1162 Like C<sv_setsv> but doesn't process magic.
1164 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1165 Like C<sv_catsv> but doesn't process magic.
1170 /* Let us hope that bitmaps for UV and IV are the same */
1171 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1172 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1173 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1175 #define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1176 #define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1180 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1181 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1182 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1184 #define SvPV_flags(sv, lp, flags) \
1185 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1186 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1187 #define SvPV_flags_const(sv, lp, flags) \
1188 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1189 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1190 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1191 #define SvPV_flags_const_nolen(sv, flags) \
1192 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1193 ? SvPVX_const(sv) : \
1194 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN))
1195 #define SvPV_flags_mutable(sv, lp, flags) \
1196 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1197 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1198 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1200 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1201 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1202 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1204 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1205 #define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
1207 #define SvPV_force_flags(sv, lp, flags) \
1208 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1209 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1210 #define SvPV_force_flags_nolen(sv, flags) \
1211 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1212 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1213 #define SvPV_force_flags_mutable(sv, lp, flags) \
1214 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1215 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1216 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1218 #define SvPV_nolen(sv) \
1219 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1220 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1222 #define SvPV_nolen_const(sv) \
1223 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1224 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1226 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1227 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1228 #define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
1232 #define SvPVutf8(sv, lp) \
1233 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1234 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1236 #define SvPVutf8_force(sv, lp) \
1237 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1238 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1241 #define SvPVutf8_nolen(sv) \
1242 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1243 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1247 #define SvPVbyte(sv, lp) \
1248 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1249 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1251 #define SvPVbyte_force(sv, lp) \
1252 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1253 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1255 #define SvPVbyte_nolen(sv) \
1256 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1257 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1261 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1262 * var to evaluate the arg once; failing that, use a global if possible;
1263 * failing that, call a function to do the work
1266 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1267 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1268 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1270 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1272 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1273 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1274 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1275 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1276 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1277 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1278 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1279 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1280 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1281 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1282 # define SvTRUE(sv) ( \
1286 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1288 (nxpv->xpv_cur > 1 || \
1289 (nxpv->xpv_cur && *(sv)->sv_u.svu_pv != '0')); }) \
1296 ? SvNVX(sv) != 0.0 \
1298 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1300 #else /* __GNUC__ */
1302 /* These inlined macros use globals, which will require a thread
1303 * declaration in user code, so we avoid them under threads */
1305 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1306 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1307 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1308 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1309 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1310 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1311 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1312 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1313 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1314 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1315 # define SvTRUE(sv) ( \
1319 ? ((PL_Xpv = (XPV*)SvANY(PL_Sv = (sv))) && \
1320 (PL_Xpv->xpv_cur > 1 || \
1321 (PL_Xpv->xpv_cur && *PL_Sv->sv_u.svu_pv != '0')) \
1328 ? SvNVX(sv) != 0.0 \
1330 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1331 #endif /* __GNU__ */
1333 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1334 (SVf_FAKE | SVf_READONLY))
1335 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1337 #define SvSHARED_HEK_FROM_PV(pvx) \
1338 ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
1339 #define SvSHARED_HASH(sv) (0 + SvSHARED_HEK_FROM_PV(SvPVX_const(sv))->hek_hash)
1341 /* flag values for sv_*_flags functions */
1342 #define SV_IMMEDIATE_UNREF 1
1344 #define SV_COW_DROP_PV 4
1345 #define SV_UTF8_NO_ENCODING 8
1346 #define SV_NOSTEAL 16
1347 #define SV_CONST_RETURN 32
1348 #define SV_MUTABLE_RETURN 64
1350 /* We are about to replace the SV's current value. So if it's copy on write
1351 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1352 the value is about to get thrown away, so drop the PV rather than go to
1353 the effort of making a read-write copy only for it to get immediately
1356 #define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1357 sv_force_normal_flags(sv, SV_COW_DROP_PV)
1359 #ifdef PERL_OLD_COPY_ON_WRITE
1360 # define SvRELEASE_IVX(sv) ((void)((SvFLAGS(sv) & (SVf_OOK|SVf_READONLY|SVf_FAKE)) \
1361 && Perl_sv_release_IVX(aTHX_ sv)))
1362 # define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
1364 # define SvRELEASE_IVX(sv) SvOOK_off(sv)
1365 #endif /* PERL_OLD_COPY_ON_WRITE */
1367 #define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1368 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1369 SVf_OOK|SVf_BREAK|SVf_READONLY|SVf_AMAGIC)
1370 #define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1372 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1373 sv_force_normal_flags(sv, 0)
1376 /* all these 'functions' are now just macros */
1378 #define sv_pv(sv) SvPV_nolen(sv)
1379 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1380 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1382 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1383 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1384 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1385 #define sv_setsv(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_GMAGIC)
1386 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, 0)
1387 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1388 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1389 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1390 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1391 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1392 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1393 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1394 #define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1395 #define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
1397 /* Should be named SvCatPVN_utf8_upgrade? */
1398 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1401 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1403 sv_setpvn(nsv, sstr, slen); \
1405 sv_utf8_upgrade(nsv); \
1406 sv_catsv(dsv, nsv); \
1410 =for apidoc Am|SV*|newRV_inc|SV* sv
1412 Creates an RV wrapper for an SV. The reference count for the original SV is
1418 #define newRV_inc(sv) newRV(sv)
1420 /* the following macros update any magic values this sv is associated with */
1423 =head1 Magical Functions
1425 =for apidoc Am|void|SvGETMAGIC|SV* sv
1426 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1427 argument more than once.
1429 =for apidoc Am|void|SvSETMAGIC|SV* sv
1430 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1431 argument more than once.
1433 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1434 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1437 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1438 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1439 ssv. May evaluate arguments more than once.
1441 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1442 Like C<SvSetSV>, but does any set magic required afterwards.
1444 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1445 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1447 =for apidoc Am|void|SvSHARE|SV* sv
1448 Arranges for sv to be shared between threads if a suitable module
1451 =for apidoc Am|void|SvLOCK|SV* sv
1452 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1455 =for apidoc Am|void|SvUNLOCK|SV* sv
1456 Releases a mutual exclusion lock on sv if a suitable module
1459 =head1 SV Manipulation Functions
1461 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1462 Expands the character buffer in the SV so that it has room for the
1463 indicated number of bytes (remember to reserve space for an extra trailing
1464 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1465 Returns a pointer to the character buffer.
1470 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1471 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1472 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1474 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1475 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1477 #define SvSetSV_and(dst,src,finally) \
1479 if ((dst) != (src)) { \
1480 sv_setsv(dst, src); \
1484 #define SvSetSV_nosteal_and(dst,src,finally) \
1486 if ((dst) != (src)) { \
1487 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL); \
1492 #define SvSetSV(dst,src) \
1493 SvSetSV_and(dst,src,/*nothing*/;)
1494 #define SvSetSV_nosteal(dst,src) \
1495 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1497 #define SvSetMagicSV(dst,src) \
1498 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1499 #define SvSetMagicSV_nosteal(dst,src) \
1500 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1503 #if !defined(SKIP_DEBUGGING)
1504 #define SvPEEK(sv) sv_peek(sv)
1506 #define SvPEEK(sv) ""
1509 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1511 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1513 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1515 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1516 #define SvGROW_mutable(sv,len) \
1517 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
1518 #define Sv_Grow sv_grow
1520 #define CLONEf_COPY_STACKS 1
1521 #define CLONEf_KEEP_PTR_TABLE 2
1522 #define CLONEf_CLONE_HOST 4
1523 #define CLONEf_JOIN_IN 8
1525 struct clone_params {
1528 PerlInterpreter *proto_perl;
1533 * c-indentation-style: bsd
1535 * indent-tabs-mode: t
1538 * ex: set ts=8 sts=4 sw=4 noet: