3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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>.
51 /* RV was here, before it was merged with IV. */
57 /* PVBM was here, before BIND replaced it. */
65 SVt_LAST /* keep last in enum. used to size arrays */
69 /* Although Fast Boyer Moore tables are now being stored in PVGVs, for most
70 purposes eternal code wanting to consider PVBM probably needs to think of
72 # define SVt_PVBM SVt_PVMG
73 /* Anything wanting to create a reference from clean should ensure that it has
74 a scalar of type SVt_IV now: */
75 # define SVt_RV SVt_IV
78 /* There is collusion here with sv_clear - sv_clear exits early for SVt_NULL
79 so never reaches the clause at the end that uses sv_type_details->body_size
80 to determine whether to call safefree(). Hence body_size can be set
81 non-zero to record the size of HEs, without fear of bogus frees. */
82 #if defined(PERL_IN_HV_C) || defined(PERL_IN_XS_APITEST)
83 #define HE_SVSLOT SVt_NULL
86 #define PERL_ARENA_ROOTS_SIZE (SVt_LAST)
88 /* typedefs to eliminate some typing */
90 typedef struct hek HEK;
92 /* Using C's structural equivalence to help emulate C++ inheritance here... */
94 /* start with 2 sv-head building blocks */
95 #define _SV_HEAD(ptrtype) \
96 ptrtype sv_any; /* pointer to body */ \
97 U32 sv_refcnt; /* how many references to us */ \
98 U32 sv_flags /* what we are */
100 #define _SV_HEAD_UNION \
102 char* svu_pv; /* pointer to malloced string */ \
105 SV* svu_rv; /* pointer to another SV */ \
113 struct STRUCT_SV { /* struct sv { */
116 #ifdef DEBUG_LEAKING_SCALARS
117 PERL_BITFIELD32 sv_debug_optype:9; /* the type of OP that allocated us */
118 PERL_BITFIELD32 sv_debug_inpad:1; /* was allocated in a pad for an OP */
119 PERL_BITFIELD32 sv_debug_line:16; /* the line where we were allocated */
120 UV sv_debug_serial; /* serial number of sv allocation */
121 char * sv_debug_file; /* the file where we were allocated */
122 SV * sv_debug_parent; /* what we were cloned from (ithreads)*/
127 _SV_HEAD(XPVGV*); /* pointer to xpvgv body */
132 _SV_HEAD(XPVCV*); /* pointer to xpvcv body */
137 _SV_HEAD(XPVAV*); /* pointer to xpvav body */
142 _SV_HEAD(XPVHV*); /* pointer to xpvhv body */
147 _SV_HEAD(XPVIO*); /* pointer to xpvio body */
152 _SV_HEAD(struct regexp*); /* pointer to regexp body */
157 #undef _SV_HEAD_UNION /* ensure no pollution */
160 =head1 SV Manipulation Functions
162 =for apidoc Am|U32|SvREFCNT|SV* sv
163 Returns the value of the object's reference count.
165 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
166 Increments the reference count of the given SV.
168 All of the following SvREFCNT_inc* macros are optimized versions of
169 SvREFCNT_inc, and can be replaced with SvREFCNT_inc.
171 =for apidoc Am|SV*|SvREFCNT_inc_NN|SV* sv
172 Same as SvREFCNT_inc, but can only be used if you know I<sv>
173 is not NULL. Since we don't have to check the NULLness, it's faster
176 =for apidoc Am|void|SvREFCNT_inc_void|SV* sv
177 Same as SvREFCNT_inc, but can only be used if you don't need the
178 return value. The macro doesn't need to return a meaningful value.
180 =for apidoc Am|void|SvREFCNT_inc_void_NN|SV* sv
181 Same as SvREFCNT_inc, but can only be used if you don't need the return
182 value, and you know that I<sv> is not NULL. The macro doesn't need
183 to return a meaningful value, or check for NULLness, so it's smaller
186 =for apidoc Am|SV*|SvREFCNT_inc_simple|SV* sv
187 Same as SvREFCNT_inc, but can only be used with expressions without side
188 effects. Since we don't have to store a temporary value, it's faster.
190 =for apidoc Am|SV*|SvREFCNT_inc_simple_NN|SV* sv
191 Same as SvREFCNT_inc_simple, but can only be used if you know I<sv>
192 is not NULL. Since we don't have to check the NULLness, it's faster
195 =for apidoc Am|void|SvREFCNT_inc_simple_void|SV* sv
196 Same as SvREFCNT_inc_simple, but can only be used if you don't need the
197 return value. The macro doesn't need to return a meaningful value.
199 =for apidoc Am|void|SvREFCNT_inc_simple_void_NN|SV* sv
200 Same as SvREFCNT_inc, but can only be used if you don't need the return
201 value, and you know that I<sv> is not NULL. The macro doesn't need
202 to return a meaningful value, or check for NULLness, so it's smaller
205 =for apidoc Am|void|SvREFCNT_dec|SV* sv
206 Decrements the reference count of the given SV.
208 =for apidoc Am|svtype|SvTYPE|SV* sv
209 Returns the type of the SV. See C<svtype>.
211 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
212 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
213 perform the upgrade if necessary. See C<svtype>.
218 #define SvANY(sv) (sv)->sv_any
219 #define SvFLAGS(sv) (sv)->sv_flags
220 #define SvREFCNT(sv) (sv)->sv_refcnt
222 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
223 # define SvREFCNT_inc(sv) \
225 SV * const _sv = MUTABLE_SV(sv); \
230 # define SvREFCNT_inc_simple(sv) \
236 # define SvREFCNT_inc_NN(sv) \
238 SV * const _sv = MUTABLE_SV(sv); \
242 # define SvREFCNT_inc_void(sv) \
244 SV * const _sv = MUTABLE_SV(sv); \
246 (void)(SvREFCNT(_sv)++); \
249 # define SvREFCNT_inc(sv) \
250 ((PL_Sv=MUTABLE_SV(sv)) ? (++(SvREFCNT(PL_Sv)),PL_Sv) : NULL)
251 # define SvREFCNT_inc_simple(sv) \
252 ((sv) ? (SvREFCNT(sv)++,MUTABLE_SV(sv)) : NULL)
253 # define SvREFCNT_inc_NN(sv) \
254 (PL_Sv=MUTABLE_SV(sv),++(SvREFCNT(PL_Sv)),PL_Sv)
255 # define SvREFCNT_inc_void(sv) \
256 (void)((PL_Sv=MUTABLE_SV(sv)) ? ++(SvREFCNT(PL_Sv)) : 0)
259 /* These guys don't need the curly blocks */
260 #define SvREFCNT_inc_simple_void(sv) STMT_START { if (sv) SvREFCNT(sv)++; } STMT_END
261 #define SvREFCNT_inc_simple_NN(sv) (++(SvREFCNT(sv)),MUTABLE_SV(sv))
262 #define SvREFCNT_inc_void_NN(sv) (void)(++SvREFCNT(MUTABLE_SV(sv)))
263 #define SvREFCNT_inc_simple_void_NN(sv) (void)(++SvREFCNT(MUTABLE_SV(sv)))
265 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
266 # define SvREFCNT_dec(sv) \
268 SV * const _sv = MUTABLE_SV(sv); \
270 if (SvREFCNT(_sv)) { \
271 if (--(SvREFCNT(_sv)) == 0) \
272 Perl_sv_free2(aTHX_ _sv); \
279 #define SvREFCNT_dec(sv) sv_free(MUTABLE_SV(sv))
282 #define SVTYPEMASK 0xff
283 #define SvTYPE(sv) ((svtype)((sv)->sv_flags & SVTYPEMASK))
285 /* Sadly there are some parts of the core that have pointers to already-freed
286 SV heads, and rely on being able to tell that they are now free. So mark
287 them all by using a consistent macro. */
288 #define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
290 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= (mt) || (sv_upgrade(sv, mt), 1))
292 #define SVf_IOK 0x00000100 /* has valid public integer value */
293 #define SVf_NOK 0x00000200 /* has valid public numeric value */
294 #define SVf_POK 0x00000400 /* has valid public pointer value */
295 #define SVf_ROK 0x00000800 /* has a valid reference pointer */
297 #define SVp_IOK 0x00001000 /* has valid non-public integer value */
298 #define SVp_NOK 0x00002000 /* has valid non-public numeric value */
299 #define SVp_POK 0x00004000 /* has valid non-public pointer value */
300 #define SVp_SCREAM 0x00008000 /* has been studied? */
301 #define SVphv_CLONEABLE SVp_SCREAM /* PVHV (stashes) clone its objects */
302 #define SVpgv_GP SVp_SCREAM /* GV has a valid GP */
303 #define SVprv_PCS_IMPORTED SVp_SCREAM /* RV is a proxy for a constant
304 subroutine in another package. Set the
305 CvIMPORTED_CV_ON() if it needs to be
306 expanded to a real GV */
308 #define SVs_PADSTALE 0x00010000 /* lexical has gone out of scope */
309 #define SVpad_STATE 0x00010000 /* pad name is a "state" var */
310 #define SVs_PADTMP 0x00020000 /* in use as tmp */
311 #define SVpad_TYPED 0x00020000 /* pad name is a Typed Lexical */
312 #define SVs_PADMY 0x00040000 /* in use a "my" variable */
313 #define SVpad_OUR 0x00040000 /* pad name is "our" instead of "my" */
314 #define SVs_TEMP 0x00080000 /* string is stealable? */
315 #define SVs_OBJECT 0x00100000 /* is "blessed" */
316 #define SVs_GMG 0x00200000 /* has magical get method */
317 #define SVs_SMG 0x00400000 /* has magical set method */
318 #define SVs_RMG 0x00800000 /* has random magical methods */
320 #define SVf_FAKE 0x01000000 /* 0: glob or lexical is just a copy
321 1: SV head arena wasn't malloc()ed
322 2: in conjunction with SVf_READONLY
323 marks a shared hash key scalar
324 (SvLEN == 0) or a copy on write
325 string (SvLEN != 0) [SvIsCOW(sv)]
326 3: For PVCV, whether CvUNIQUE(cv)
327 refers to an eval or once only
328 [CvEVAL(cv), CvSPECIAL(cv)]
329 4: On a pad name SV, that slot in the
330 frame AV is a REFCNT'ed reference
331 to a lexical from "outside". */
332 #define SVphv_REHASH SVf_FAKE /* 5: On a PVHV, hash values are being
334 #define SVf_OOK 0x02000000 /* has valid offset value. For a PVHV this
335 means that a hv_aux struct is present
336 after the main array */
337 #define SVf_BREAK 0x04000000 /* refcnt is artificially low - used by
338 SVs in final arena cleanup.
339 Set in S_regtry on PL_reg_curpm, so that
340 perl_destruct will skip it. */
341 #define SVf_READONLY 0x08000000 /* may not be modified */
346 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
348 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
349 SVp_IOK|SVp_NOK|SVp_POK|SVpgv_GP)
351 #define PRIVSHIFT 4 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
353 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
355 /* Ensure this value does not clash with the GV_ADD* flags in gv.h: */
356 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded
357 This is also set on RVs whose overloaded
358 stringification is UTF-8. This might
359 only happen as a side effect of SvPV() */
362 /* Some private flags. */
364 /* PVAV could probably use 0x2000000 without conflict. I assume that PVFM can
365 be UTF-8 encoded, and PVCVs could well have UTF-8 prototypes. PVIOs haven't
366 been restructured, so sometimes get used as string buffers. */
369 #define SVphv_SHAREKEYS 0x20000000 /* PVHV keys live on shared string table */
370 /* PVNV, PVMG, presumably only inside pads */
371 #define SVpad_NAME 0x40000000 /* This SV is a name in the PAD, so
372 SVpad_TYPED, SVpad_OUR and SVpad_STATE
375 #define SVpav_REAL 0x40000000 /* free old entries */
377 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
378 /* This is only set true on a PVGV when it's playing "PVBM", but is tested for
379 on any regular scalar (anything <= PVLV) */
380 #define SVpbm_VALID 0x40000000
382 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
384 /* IV, PVIV, PVNV, PVMG, PVGV and (I assume) PVLV */
385 /* Presumably IVs aren't stored in pads */
386 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
388 #define SVpav_REIFY 0x80000000 /* can become real */
390 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
392 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
393 /* PVGV when SVpbm_VALID is true */
394 #define SVpbm_TAIL 0x80000000
395 /* RV upwards. However, SVf_ROK and SVp_IOK are exclusive */
396 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
399 HV* xmg_stash; /* class package */ \
401 STRLEN xpv_cur; /* length of svu_pv as a C string */ \
402 STRLEN xpv_len /* allocated size */
405 NV xnv_nv; /* numeric value, if any */
410 } xpad_cop_seq; /* used by pad.c for cop_sequence */
412 U32 xbm_previous; /* how many characters in string before rare? */
414 U8 xbm_rare; /* rarest character in string */
415 } xbm_s; /* fields from PVBM */
419 IV xivu_iv; /* integer value */
421 I32 xivu_i32; /* BmUSEFUL */
422 HEK * xivu_namehek; /* xpvlv, xpvgv: GvNAME */
426 MAGIC* xmg_magic; /* linked list of magicalness */
427 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
439 #define xiv_iv xiv_u.xivu_iv
446 #define xuv_uv xuv_u.xivu_uv
454 /* This structure must match the beginning of struct xpvhv in hv.h. */
468 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
469 * y=alem/helem/iter t=tie T=tied HE */
472 /* This structure works in 3 ways - regular scalar, GV with GP, or fast
480 /* This structure must match XPVCV in cv.h */
482 typedef U16 cv_flags_t;
484 #define _XPVCV_COMMON \
492 void (*xcv_xsub) (pTHX_ CV*); \
498 U32 xcv_outside_seq; /* the COP sequence (at the point of our \
499 * compilation) in the lexically enclosing \
513 /* ifp and ofp are normally the same, but sockets need separate streams */
515 /* Cray addresses everything by word boundaries (64 bits) and
516 * code and data pointers cannot be mixed (which is exactly what
517 * Perl_filter_add() tries to do with the dirp), hence the
518 * following union trick (as suggested by Gurusamy Sarathy).
519 * For further information see Geir Johansen's problem report
520 * titled [ID 20000612.002] Perl problem on Cray system
521 * The any pointer (known as IoANY()) will also be a good place
522 * to hang any IO disciplines to.
525 DIR * xiou_dirp; /* for opendir, readdir, etc */
526 void * xiou_any; /* for alignment */
528 /* IV xio_lines is now in IVX $. */
529 IV xio_page; /* $% */
530 IV xio_page_len; /* $= */
531 IV xio_lines_left; /* $- */
532 char * xio_top_name; /* $^ */
533 GV * xio_top_gv; /* $^ */
534 char * xio_fmt_name; /* $~ */
535 GV * xio_fmt_gv; /* $~ */
536 char * xio_bottom_name;/* $^B */
537 GV * xio_bottom_gv; /* $^B */
542 #define xio_dirp xio_dirpu.xiou_dirp
543 #define xio_any xio_dirpu.xiou_any
545 #define IOf_ARGV 1 /* this fp iterates over ARGV */
546 #define IOf_START 2 /* check for null ARGV and substitute '-' */
547 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
548 #define IOf_DIDTOP 8 /* just did top of form */
549 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
550 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
551 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge)
552 Also, when this is set, SvPVX() is valid */
554 /* The following macros define implementation-independent predicates on SVs. */
557 =for apidoc Am|U32|SvNIOK|SV* sv
558 Returns a U32 value indicating whether the SV contains a number, integer or
561 =for apidoc Am|U32|SvNIOKp|SV* sv
562 Returns a U32 value indicating whether the SV contains a number, integer or
563 double. Checks the B<private> setting. Use C<SvNIOK> instead.
565 =for apidoc Am|void|SvNIOK_off|SV* sv
566 Unsets the NV/IV status of an SV.
568 =for apidoc Am|U32|SvOK|SV* sv
569 Returns a U32 value indicating whether the value is defined. This is
570 only meaningful for scalars.
572 =for apidoc Am|U32|SvIOKp|SV* sv
573 Returns a U32 value indicating whether the SV contains an integer. Checks
574 the B<private> setting. Use C<SvIOK> instead.
576 =for apidoc Am|U32|SvNOKp|SV* sv
577 Returns a U32 value indicating whether the SV contains a double. Checks the
578 B<private> setting. Use C<SvNOK> instead.
580 =for apidoc Am|U32|SvPOKp|SV* sv
581 Returns a U32 value indicating whether the SV contains a character string.
582 Checks the B<private> setting. Use C<SvPOK> instead.
584 =for apidoc Am|U32|SvIOK|SV* sv
585 Returns a U32 value indicating whether the SV contains an integer.
587 =for apidoc Am|void|SvIOK_on|SV* sv
588 Tells an SV that it is an integer.
590 =for apidoc Am|void|SvIOK_off|SV* sv
591 Unsets the IV status of an SV.
593 =for apidoc Am|void|SvIOK_only|SV* sv
594 Tells an SV that it is an integer and disables all other OK bits.
596 =for apidoc Am|void|SvIOK_only_UV|SV* sv
597 Tells and SV that it is an unsigned integer and disables all other OK bits.
599 =for apidoc Am|bool|SvIOK_UV|SV* sv
600 Returns a boolean indicating whether the SV contains an unsigned integer.
602 =for apidoc Am|bool|SvUOK|SV* sv
603 Returns a boolean indicating whether the SV contains an unsigned integer.
605 =for apidoc Am|bool|SvIOK_notUV|SV* sv
606 Returns a boolean indicating whether the SV contains a signed integer.
608 =for apidoc Am|U32|SvNOK|SV* sv
609 Returns a U32 value indicating whether the SV contains a double.
611 =for apidoc Am|void|SvNOK_on|SV* sv
612 Tells an SV that it is a double.
614 =for apidoc Am|void|SvNOK_off|SV* sv
615 Unsets the NV status of an SV.
617 =for apidoc Am|void|SvNOK_only|SV* sv
618 Tells an SV that it is a double and disables all other OK bits.
620 =for apidoc Am|U32|SvPOK|SV* sv
621 Returns a U32 value indicating whether the SV contains a character
624 =for apidoc Am|void|SvPOK_on|SV* sv
625 Tells an SV that it is a string.
627 =for apidoc Am|void|SvPOK_off|SV* sv
628 Unsets the PV status of an SV.
630 =for apidoc Am|void|SvPOK_only|SV* sv
631 Tells an SV that it is a string and disables all other OK bits.
632 Will also turn off the UTF-8 status.
634 =for apidoc Am|bool|SvVOK|SV* sv
635 Returns a boolean indicating whether the SV contains a v-string.
637 =for apidoc Am|U32|SvOOK|SV* sv
638 Returns a U32 indicating whether the pointer to the string buffer is offset.
639 This hack is used internally to speed up removal of characters from the
640 beginning of a SvPV. When SvOOK is true, then the start of the
641 allocated string buffer is actually C<SvOOK_offset()> bytes before SvPVX.
642 This offset used to be stored in SvIVX, but is now stored within the spare
645 =for apidoc Am|U32|SvROK|SV* sv
646 Tests if the SV is an RV.
648 =for apidoc Am|void|SvROK_on|SV* sv
649 Tells an SV that it is an RV.
651 =for apidoc Am|void|SvROK_off|SV* sv
652 Unsets the RV status of an SV.
654 =for apidoc Am|SV*|SvRV|SV* sv
655 Dereferences an RV to return the SV.
657 =for apidoc Am|IV|SvIVX|SV* sv
658 Returns the raw value in the SV's IV slot, without checks or conversions.
659 Only use when you are sure SvIOK is true. See also C<SvIV()>.
661 =for apidoc Am|UV|SvUVX|SV* sv
662 Returns the raw value in the SV's UV slot, without checks or conversions.
663 Only use when you are sure SvIOK is true. See also C<SvUV()>.
665 =for apidoc Am|NV|SvNVX|SV* sv
666 Returns the raw value in the SV's NV slot, without checks or conversions.
667 Only use when you are sure SvNOK is true. See also C<SvNV()>.
669 =for apidoc Am|char*|SvPVX|SV* sv
670 Returns a pointer to the physical string in the SV. The SV must contain a
673 =for apidoc Am|STRLEN|SvCUR|SV* sv
674 Returns the length of the string which is in the SV. See C<SvLEN>.
676 =for apidoc Am|STRLEN|SvLEN|SV* sv
677 Returns the size of the string buffer in the SV, not including any part
678 attributable to C<SvOOK>. See C<SvCUR>.
680 =for apidoc Am|char*|SvEND|SV* sv
681 Returns a pointer to the last character in the string which is in the SV.
682 See C<SvCUR>. Access the character as *(SvEND(sv)).
684 =for apidoc Am|HV*|SvSTASH|SV* sv
685 Returns the stash of the SV.
687 =for apidoc Am|void|SvIV_set|SV* sv|IV val
688 Set the value of the IV pointer in sv to val. It is possible to perform
689 the same function of this macro with an lvalue assignment to C<SvIVX>.
690 With future Perls, however, it will be more efficient to use
691 C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
693 =for apidoc Am|void|SvNV_set|SV* sv|NV val
694 Set the value of the NV pointer in sv to val. See C<SvIV_set>.
696 =for apidoc Am|void|SvPV_set|SV* sv|char* val
697 Set the value of the PV pointer in sv to val. See C<SvIV_set>.
699 =for apidoc Am|void|SvUV_set|SV* sv|UV val
700 Set the value of the UV pointer in sv to val. See C<SvIV_set>.
702 =for apidoc Am|void|SvRV_set|SV* sv|SV* val
703 Set the value of the RV pointer in sv to val. See C<SvIV_set>.
705 =for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
706 Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>.
708 =for apidoc Am|void|SvSTASH_set|SV* sv|HV* val
709 Set the value of the STASH pointer in sv to val. See C<SvIV_set>.
711 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
712 Set the current length of the string which is in the SV. See C<SvCUR>
715 =for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
716 Set the actual length of the string which is in the SV. See C<SvIV_set>.
721 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
722 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
723 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
724 SVp_IOK|SVp_NOK|SVf_IVisUV))
726 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
727 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
728 #define assert_not_glob(sv) ({assert(!isGV_with_GP(sv));}),
730 #define assert_not_ROK(sv)
731 #define assert_not_glob(sv)
734 #define SvOK(sv) ((SvTYPE(sv) == SVt_BIND) \
735 ? (SvFLAGS(SvRV(sv)) & SVf_OK) \
736 : (SvFLAGS(sv) & SVf_OK))
737 #define SvOK_off(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
738 SvFLAGS(sv) &= ~(SVf_OK| \
739 SVf_IVisUV|SVf_UTF8), \
741 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
742 SvFLAGS(sv) &= ~(SVf_OK| \
746 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
747 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
748 #define SvIOKp_on(sv) (assert_not_glob(sv) SvRELEASE_IVX_(sv) \
749 SvFLAGS(sv) |= SVp_IOK)
750 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
751 #define SvNOKp_on(sv) (assert_not_glob(sv) SvFLAGS(sv) |= SVp_NOK)
752 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
753 #define SvPOKp_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
754 SvFLAGS(sv) |= SVp_POK)
756 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
757 #define SvIOK_on(sv) (assert_not_glob(sv) SvRELEASE_IVX_(sv) \
758 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
759 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
760 #define SvIOK_only(sv) (SvOK_off(sv), \
761 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
762 #define SvIOK_only_UV(sv) (assert_not_glob(sv) SvOK_off_exc_UV(sv), \
763 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
765 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
766 == (SVf_IOK|SVf_IVisUV))
767 #define SvUOK(sv) SvIOK_UV(sv)
768 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
771 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
772 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
773 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
775 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
776 #define SvNOK_on(sv) (assert_not_glob(sv) \
777 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
778 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
779 #define SvNOK_only(sv) (SvOK_off(sv), \
780 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
783 =for apidoc Am|U32|SvUTF8|SV* sv
784 Returns a U32 value indicating whether the SV contains UTF-8 encoded data.
785 Call this after SvPV() in case any call to string overloading updates the
788 =for apidoc Am|void|SvUTF8_on|SV *sv
789 Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
790 Do not use frivolously.
792 =for apidoc Am|void|SvUTF8_off|SV *sv
793 Unsets the UTF-8 status of an SV.
795 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
796 Tells an SV that it is a string and disables all other OK bits,
797 and leaves the UTF-8 status as it was.
802 /* Ensure the return value of this macro does not clash with the GV_ADD* flags
804 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
805 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
806 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
808 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
809 #define SvPOK_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
810 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
811 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
812 #define SvPOK_only(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
813 SvFLAGS(sv) &= ~(SVf_OK| \
814 SVf_IVisUV|SVf_UTF8), \
815 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
816 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
817 SvFLAGS(sv) &= ~(SVf_OK| \
819 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
821 #define SvVOK(sv) (SvMAGICAL(sv) \
822 && mg_find(sv,PERL_MAGIC_vstring))
823 /* returns the vstring magic, if any */
824 #define SvVSTRING_mg(sv) (SvMAGICAL(sv) \
825 ? mg_find(sv,PERL_MAGIC_vstring) : NULL)
827 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
828 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
829 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
831 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
832 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
833 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
835 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
836 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
837 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK))
839 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
840 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
841 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
843 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
844 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
845 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
847 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
848 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
849 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
851 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
852 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
853 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
855 #define SvAMAGIC(sv) (SvROK(sv) && (SvFLAGS(SvRV(sv)) & SVf_AMAGIC))
856 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
857 # define SvAMAGIC_on(sv) ({ SV * const kloink = sv; \
858 assert(SvROK(kloink)); \
859 SvFLAGS(SvRV(kloink)) |= SVf_AMAGIC; \
861 # define SvAMAGIC_off(sv) ({ SV * const kloink = sv; \
863 SvFLAGS(SvRV(kloink)) &= ~SVf_AMAGIC;\
866 # define SvAMAGIC_on(sv) (SvFLAGS(SvRV(sv)) |= SVf_AMAGIC)
867 # define SvAMAGIC_off(sv) \
868 (SvROK(sv) && (SvFLAGS(SvRV(sv)) &= ~SVf_AMAGIC))
872 =for apidoc Am|U32|SvGAMAGIC|SV* sv
874 Returns true if the SV has get magic or overloading. If either is true then
875 the scalar is active data, and has the potential to return a new value every
876 time it is accessed. Hence you must be careful to only read it once per user
877 logical operation and work with that returned value. If neither is true then
878 the scalar's value cannot change unless written to.
883 #define SvGAMAGIC(sv) (SvGMAGICAL(sv) || SvAMAGIC(sv))
885 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash, FALSE))
887 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
888 == (SVf_ROK|SVprv_WEAKREF))
889 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
890 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
892 #define SvPCS_IMPORTED(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_PCS_IMPORTED)) \
893 == (SVf_ROK|SVprv_PCS_IMPORTED))
894 #define SvPCS_IMPORTED_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_PCS_IMPORTED))
895 #define SvPCS_IMPORTED_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_PCS_IMPORTED))
897 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
899 #define SvPADSTALE(sv) (SvFLAGS(sv) & SVs_PADSTALE)
900 #define SvPADSTALE_on(sv) (SvFLAGS(sv) |= SVs_PADSTALE)
901 #define SvPADSTALE_off(sv) (SvFLAGS(sv) &= ~SVs_PADSTALE)
903 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
904 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
905 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
907 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
908 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY)
910 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
911 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
912 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
914 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
915 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
916 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
918 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
919 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
920 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
922 #define SvSCREAM(sv) ((SvFLAGS(sv) & (SVp_SCREAM|SVp_POK)) == (SVp_SCREAM|SVp_POK))
923 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
924 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
926 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
927 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
928 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
930 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
931 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
932 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
934 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
935 # define SvVALID(sv) ({ const SV *const _svvalid = (const SV*)(sv); \
936 if (SvFLAGS(_svvalid) & SVpbm_VALID) \
937 assert(!isGV_with_GP(_svvalid)); \
938 (SvFLAGS(_svvalid) & SVpbm_VALID); \
940 # define SvVALID_on(sv) ({ SV *const _svvalid = MUTABLE_SV(sv); \
941 assert(!isGV_with_GP(_svvalid)); \
942 (SvFLAGS(_svvalid) |= SVpbm_VALID); \
944 # define SvVALID_off(sv) ({ SV *const _svvalid = MUTABLE_SV(sv); \
945 assert(!isGV_with_GP(_svvalid)); \
946 (SvFLAGS(_svvalid) &= ~SVpbm_VALID); \
949 # define SvTAIL(sv) ({ const SV *const _svtail = (const SV *)(sv); \
950 assert(SvTYPE(_svtail) != SVt_PVAV); \
951 assert(SvTYPE(_svtail) != SVt_PVHV); \
952 (SvFLAGS(sv) & (SVpbm_TAIL|SVpbm_VALID)) \
953 == (SVpbm_TAIL|SVpbm_VALID); \
956 # define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
957 # define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
958 # define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
959 # define SvTAIL(sv) ((SvFLAGS(sv) & (SVpbm_TAIL|SVpbm_VALID)) \
960 == (SVpbm_TAIL|SVpbm_VALID))
963 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
964 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
967 #define SvPAD_TYPED(sv) \
968 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_TYPED)) == (SVpad_NAME|SVpad_TYPED))
970 #define SvPAD_OUR(sv) \
971 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_OUR)) == (SVpad_NAME|SVpad_OUR))
973 #define SvPAD_STATE(sv) \
974 ((SvFLAGS(sv) & (SVpad_NAME|SVpad_STATE)) == (SVpad_NAME|SVpad_STATE))
976 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
977 # define SvPAD_TYPED_on(sv) ({ \
978 SV *const _svpad = MUTABLE_SV(sv); \
979 assert(SvTYPE(_svpad) == SVt_PVMG); \
980 (SvFLAGS(_svpad) |= SVpad_NAME|SVpad_TYPED); \
982 #define SvPAD_OUR_on(sv) ({ \
983 SV *const _svpad = MUTABLE_SV(sv); \
984 assert(SvTYPE(_svpad) == SVt_PVMG); \
985 (SvFLAGS(_svpad) |= SVpad_NAME|SVpad_OUR); \
987 #define SvPAD_STATE_on(sv) ({ \
988 SV *const _svpad = MUTABLE_SV(sv); \
989 assert(SvTYPE(_svpad) == SVt_PVNV || SvTYPE(_svpad) == SVt_PVMG); \
990 (SvFLAGS(_svpad) |= SVpad_NAME|SVpad_STATE); \
993 # define SvPAD_TYPED_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_TYPED)
994 # define SvPAD_OUR_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_OUR)
995 # define SvPAD_STATE_on(sv) (SvFLAGS(sv) |= SVpad_NAME|SVpad_STATE)
998 #define SvOURSTASH(sv) \
999 (SvPAD_OUR(sv) ? ((XPVMG*) SvANY(sv))->xmg_u.xmg_ourstash : NULL)
1000 #define SvOURSTASH_set(sv, st) \
1002 assert(SvTYPE(sv) == SVt_PVMG); \
1003 ((XPVMG*) SvANY(sv))->xmg_u.xmg_ourstash = st; \
1006 #ifdef PERL_DEBUG_COW
1009 #define SvRVx(sv) SvRV(sv)
1011 #ifdef PERL_DEBUG_COW
1012 /* Need -0.0 for SvNVX to preserve IEEE FP "negative zero" because
1013 +0.0 + -0.0 => +0.0 but -0.0 + -0.0 => -0.0 */
1014 # define SvIVX(sv) (0 + ((XPVIV*) SvANY(sv))->xiv_iv)
1015 # define SvUVX(sv) (0 + ((XPVUV*) SvANY(sv))->xuv_uv)
1016 # define SvNVX(sv) (-0.0 + ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv)
1017 # define SvRV(sv) (0 + (sv)->sv_u.svu_rv)
1018 # define SvRV_const(sv) (0 + (sv)->sv_u.svu_rv)
1019 /* Don't test the core XS code yet. */
1020 # if defined (PERL_CORE) && PERL_DEBUG_COW > 1
1021 # define SvPVX(sv) (0 + (assert(!SvREADONLY(sv)), (sv)->sv_u.svu_pv))
1023 # define SvPVX(sv) SvPVX_mutable(sv)
1025 # define SvCUR(sv) (0 + ((XPV*) SvANY(sv))->xpv_cur)
1026 # define SvLEN(sv) (0 + ((XPV*) SvANY(sv))->xpv_len)
1027 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1030 # define SvMAGIC(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_u.xmg_magic))
1031 # define SvSTASH(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
1033 # define SvMAGIC(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic)
1034 # define SvSTASH(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_stash)
1037 # define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
1038 # define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1040 # if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1041 /* These get expanded inside other macros that already use a variable _sv */
1042 # define SvPVX(sv) \
1043 (*({ SV *const _svpvx = MUTABLE_SV(sv); \
1044 assert(SvTYPE(_svpvx) >= SVt_PV); \
1045 assert(SvTYPE(_svpvx) != SVt_PVAV); \
1046 assert(SvTYPE(_svpvx) != SVt_PVHV); \
1047 assert(!isGV_with_GP(_svpvx)); \
1048 assert(!(SvTYPE(_svpvx) == SVt_PVIO \
1049 && !(IoFLAGS(_svpvx) & IOf_FAKE_DIRP))); \
1050 &((_svpvx)->sv_u.svu_pv); \
1052 # define SvCUR(sv) \
1053 (*({ const SV *const _svcur = (const SV *)(sv); \
1054 assert(SvTYPE(_svcur) >= SVt_PV); \
1055 assert(SvTYPE(_svcur) != SVt_PVAV); \
1056 assert(SvTYPE(_svcur) != SVt_PVHV); \
1057 assert(!isGV_with_GP(_svcur)); \
1058 assert(!(SvTYPE(_svcur) == SVt_PVIO \
1059 && !(IoFLAGS(_svcur) & IOf_FAKE_DIRP))); \
1060 &(((XPV*) MUTABLE_PTR(SvANY(_svcur)))->xpv_cur); \
1062 # define SvIVX(sv) \
1063 (*({ const SV *const _svivx = (const SV *)(sv); \
1064 assert(SvTYPE(_svivx) == SVt_IV || SvTYPE(_svivx) >= SVt_PVIV); \
1065 assert(SvTYPE(_svivx) != SVt_PVAV); \
1066 assert(SvTYPE(_svivx) != SVt_PVHV); \
1067 assert(SvTYPE(_svivx) != SVt_PVCV); \
1068 assert(SvTYPE(_svivx) != SVt_PVFM); \
1069 assert(SvTYPE(_svivx) != SVt_PVIO); \
1070 assert(SvTYPE(_svivx) != SVt_REGEXP); \
1071 assert(!isGV_with_GP(_svivx)); \
1072 &(((XPVIV*) MUTABLE_PTR(SvANY(_svivx)))->xiv_iv); \
1074 # define SvUVX(sv) \
1075 (*({ const SV *const _svuvx = (const SV *)(sv); \
1076 assert(SvTYPE(_svuvx) == SVt_IV || SvTYPE(_svuvx) >= SVt_PVIV); \
1077 assert(SvTYPE(_svuvx) != SVt_PVAV); \
1078 assert(SvTYPE(_svuvx) != SVt_PVHV); \
1079 assert(SvTYPE(_svuvx) != SVt_PVCV); \
1080 assert(SvTYPE(_svuvx) != SVt_PVFM); \
1081 assert(SvTYPE(_svuvx) != SVt_PVIO); \
1082 assert(SvTYPE(_svuvx) != SVt_REGEXP); \
1083 assert(!isGV_with_GP(_svuvx)); \
1084 &(((XPVUV*) MUTABLE_PTR(SvANY(_svuvx)))->xuv_uv); \
1086 # define SvNVX(sv) \
1087 (*({ const SV *const _svnvx = (const SV *)(sv); \
1088 assert(SvTYPE(_svnvx) == SVt_NV || SvTYPE(_svnvx) >= SVt_PVNV); \
1089 assert(SvTYPE(_svnvx) != SVt_PVAV); \
1090 assert(SvTYPE(_svnvx) != SVt_PVHV); \
1091 assert(SvTYPE(_svnvx) != SVt_PVCV); \
1092 assert(SvTYPE(_svnvx) != SVt_PVFM); \
1093 assert(SvTYPE(_svnvx) != SVt_PVIO); \
1094 assert(SvTYPE(_svnvx) != SVt_REGEXP); \
1095 assert(!isGV_with_GP(_svnvx)); \
1096 &(((XPVNV*) MUTABLE_PTR(SvANY(_svnvx)))->xnv_u.xnv_nv); \
1099 (*({ SV *const _svrv = MUTABLE_SV(sv); \
1100 assert(SvTYPE(_svrv) >= SVt_PV || SvTYPE(_svrv) == SVt_IV); \
1101 assert(SvTYPE(_svrv) != SVt_PVAV); \
1102 assert(SvTYPE(_svrv) != SVt_PVHV); \
1103 assert(SvTYPE(_svrv) != SVt_PVCV); \
1104 assert(SvTYPE(_svrv) != SVt_PVFM); \
1105 assert(!isGV_with_GP(_svrv)); \
1106 assert(!(SvTYPE(_svrv) == SVt_PVIO \
1107 && !(IoFLAGS(_svrv) & IOf_FAKE_DIRP))); \
1108 &((_svrv)->sv_u.svu_rv); \
1110 # define SvRV_const(sv) \
1111 ({ const SV *const _svrv = (const SV *)(sv); \
1112 assert(SvTYPE(_svrv) >= SVt_PV || SvTYPE(_svrv) == SVt_IV); \
1113 assert(SvTYPE(_svrv) != SVt_PVAV); \
1114 assert(SvTYPE(_svrv) != SVt_PVHV); \
1115 assert(SvTYPE(_svrv) != SVt_PVCV); \
1116 assert(SvTYPE(_svrv) != SVt_PVFM); \
1117 assert(!isGV_with_GP(_svrv)); \
1118 assert(!(SvTYPE(_svrv) == SVt_PVIO \
1119 && !(IoFLAGS(_svrv) & IOf_FAKE_DIRP))); \
1120 (_svrv)->sv_u.svu_rv; \
1122 # define SvMAGIC(sv) \
1123 (*({ const SV *const _svmagic = (const SV *)(sv); \
1124 assert(SvTYPE(_svmagic) >= SVt_PVMG); \
1125 if(SvTYPE(_svmagic) == SVt_PVMG) \
1126 assert(!SvPAD_OUR(_svmagic)); \
1127 &(((XPVMG*) MUTABLE_PTR(SvANY(_svmagic)))->xmg_u.xmg_magic); \
1129 # define SvSTASH(sv) \
1130 (*({ const SV *const _svstash = (const SV *)(sv); \
1131 assert(SvTYPE(_svstash) >= SVt_PVMG); \
1132 &(((XPVMG*) MUTABLE_PTR(SvANY(_svstash)))->xmg_stash); \
1135 # define SvPVX(sv) ((sv)->sv_u.svu_pv)
1136 # define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
1137 # define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
1138 # define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
1139 # define SvNVX(sv) ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv
1140 # define SvRV(sv) ((sv)->sv_u.svu_rv)
1141 # define SvRV_const(sv) (0 + (sv)->sv_u.svu_rv)
1142 # define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic
1143 # define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
1148 /* Given that these two are new, there can't be any existing code using them
1150 # define SvPVX_mutable(sv) (0 + (sv)->sv_u.svu_pv)
1151 # define SvPVX_const(sv) ((const char*)(0 + (sv)->sv_u.svu_pv))
1153 /* Except for the poison code, which uses & to scribble over the pointer after
1154 free() is called. */
1155 # define SvPVX_mutable(sv) ((sv)->sv_u.svu_pv)
1156 # define SvPVX_const(sv) ((const char*)((sv)->sv_u.svu_pv))
1159 #define SvIVXx(sv) SvIVX(sv)
1160 #define SvUVXx(sv) SvUVX(sv)
1161 #define SvNVXx(sv) SvNVX(sv)
1162 #define SvPVXx(sv) SvPVX(sv)
1163 #define SvLENx(sv) SvLEN(sv)
1164 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
1167 /* Ask a scalar nicely to try to become an IV, if possible.
1168 Not guaranteed to stay returning void */
1169 /* Macro won't actually call sv_2iv if already IOK */
1170 #define SvIV_please(sv) \
1171 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
1172 (void) SvIV(sv); } STMT_END
1173 #define SvIV_please_nomg(sv) \
1174 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
1175 (void) SvIV_nomg(sv); } STMT_END
1176 #define SvIV_set(sv, val) \
1177 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1178 assert(SvTYPE(sv) != SVt_PVAV); \
1179 assert(SvTYPE(sv) != SVt_PVHV); \
1180 assert(SvTYPE(sv) != SVt_PVCV); \
1181 assert(!isGV_with_GP(sv)); \
1182 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
1183 #define SvNV_set(sv, val) \
1184 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
1185 assert(SvTYPE(sv) != SVt_PVAV); assert(SvTYPE(sv) != SVt_PVHV); \
1186 assert(SvTYPE(sv) != SVt_PVCV); assert(SvTYPE(sv) != SVt_PVFM); \
1187 assert(SvTYPE(sv) != SVt_PVIO); \
1188 assert(!isGV_with_GP(sv)); \
1189 (((XPVNV*)SvANY(sv))->xnv_u.xnv_nv = (val)); } STMT_END
1190 #define SvPV_set(sv, val) \
1191 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1192 assert(SvTYPE(sv) != SVt_PVAV); \
1193 assert(SvTYPE(sv) != SVt_PVHV); \
1194 assert(!isGV_with_GP(sv)); \
1195 assert(!(SvTYPE(sv) == SVt_PVIO \
1196 && !(IoFLAGS(sv) & IOf_FAKE_DIRP))); \
1197 ((sv)->sv_u.svu_pv = (val)); } STMT_END
1198 #define SvUV_set(sv, val) \
1199 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
1200 assert(SvTYPE(sv) != SVt_PVAV); \
1201 assert(SvTYPE(sv) != SVt_PVHV); \
1202 assert(SvTYPE(sv) != SVt_PVCV); \
1203 assert(!isGV_with_GP(sv)); \
1204 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
1205 #define SvRV_set(sv, val) \
1206 STMT_START { assert(SvTYPE(sv) >= SVt_PV || SvTYPE(sv) == SVt_IV); \
1207 assert(SvTYPE(sv) != SVt_PVAV); \
1208 assert(SvTYPE(sv) != SVt_PVHV); \
1209 assert(SvTYPE(sv) != SVt_PVCV); \
1210 assert(SvTYPE(sv) != SVt_PVFM); \
1211 assert(!isGV_with_GP(sv)); \
1212 assert(!(SvTYPE(sv) == SVt_PVIO \
1213 && !(IoFLAGS(sv) & IOf_FAKE_DIRP))); \
1214 ((sv)->sv_u.svu_rv = (val)); } STMT_END
1215 #define SvMAGIC_set(sv, val) \
1216 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1217 (((XPVMG*)SvANY(sv))->xmg_u.xmg_magic = (val)); } STMT_END
1218 #define SvSTASH_set(sv, val) \
1219 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1220 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
1221 #define SvCUR_set(sv, val) \
1222 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1223 assert(SvTYPE(sv) != SVt_PVAV); \
1224 assert(SvTYPE(sv) != SVt_PVHV); \
1225 assert(!isGV_with_GP(sv)); \
1226 assert(!(SvTYPE(sv) == SVt_PVIO \
1227 && !(IoFLAGS(sv) & IOf_FAKE_DIRP))); \
1228 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
1229 #define SvLEN_set(sv, val) \
1230 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1231 assert(SvTYPE(sv) != SVt_PVAV); \
1232 assert(SvTYPE(sv) != SVt_PVHV); \
1233 assert(!isGV_with_GP(sv)); \
1234 assert(!(SvTYPE(sv) == SVt_PVIO \
1235 && !(IoFLAGS(sv) & IOf_FAKE_DIRP))); \
1236 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
1237 #define SvEND_set(sv, val) \
1238 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
1239 SvCUR_set(sv, (val) - SvPVX(sv)); } STMT_END
1241 #define SvPV_renew(sv,n) \
1242 STMT_START { SvLEN_set(sv, n); \
1243 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
1244 (char*)saferealloc((Malloc_t)SvPVX(sv), \
1245 (MEM_SIZE)((n))))); \
1248 #define SvPV_shrink_to_cur(sv) STMT_START { \
1249 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
1250 SvPV_renew(sv, _lEnGtH); \
1253 #define SvPV_free(sv) \
1255 assert(SvTYPE(sv) >= SVt_PV); \
1257 assert(!SvROK(sv)); \
1260 SvOOK_offset(sv, zok); \
1261 SvPV_set(sv, SvPVX_mutable(sv) - zok); \
1262 SvFLAGS(sv) &= ~SVf_OOK; \
1264 Safefree(SvPVX(sv)); \
1269 /* Code that crops up in three places to take a scalar and ready it to hold
1271 # define prepare_SV_for_RV(sv) \
1273 if (SvTYPE(sv) < SVt_PV && SvTYPE(sv) != SVt_IV) \
1274 sv_upgrade(sv, SVt_IV); \
1275 else if (SvTYPE(sv) >= SVt_PV) { \
1283 #define PERL_FBM_TABLE_OFFSET 1 /* Number of bytes between EOS and table */
1285 /* SvPOKp not SvPOK in the assertion because the string can be tainted! eg
1288 #if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1289 # define BmFLAGS(sv) \
1290 (*({ SV *const _bmflags = MUTABLE_SV(sv); \
1291 assert(SvTYPE(_bmflags) == SVt_PVGV); \
1292 assert(SvVALID(_bmflags)); \
1293 &(((XPVGV*) SvANY(_bmflags))->xnv_u.xbm_s.xbm_flags); \
1295 # define BmRARE(sv) \
1296 (*({ SV *const _bmrare = MUTABLE_SV(sv); \
1297 assert(SvTYPE(_bmrare) == SVt_PVGV); \
1298 assert(SvVALID(_bmrare)); \
1299 &(((XPVGV*) SvANY(_bmrare))->xnv_u.xbm_s.xbm_rare); \
1301 # define BmUSEFUL(sv) \
1302 (*({ SV *const _bmuseful = MUTABLE_SV(sv); \
1303 assert(SvTYPE(_bmuseful) == SVt_PVGV); \
1304 assert(SvVALID(_bmuseful)); \
1305 assert(!SvIOK(_bmuseful)); \
1306 &(((XPVGV*) SvANY(_bmuseful))->xiv_u.xivu_i32); \
1308 # define BmPREVIOUS(sv) \
1309 (*({ SV *const _bmprevious = MUTABLE_SV(sv); \
1310 assert(SvTYPE(_bmprevious) == SVt_PVGV); \
1311 assert(SvVALID(_bmprevious)); \
1312 &(((XPVGV*) SvANY(_bmprevious))->xnv_u.xbm_s.xbm_previous); \
1315 # define BmFLAGS(sv) ((XPVGV*) SvANY(sv))->xnv_u.xbm_s.xbm_flags
1316 # define BmRARE(sv) ((XPVGV*) SvANY(sv))->xnv_u.xbm_s.xbm_rare
1317 # define BmUSEFUL(sv) ((XPVGV*) SvANY(sv))->xiv_u.xivu_i32
1318 # define BmPREVIOUS(sv) ((XPVGV*) SvANY(sv))->xnv_u.xbm_s.xbm_previous
1322 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
1324 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
1325 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
1326 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
1327 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
1329 #define IoIFP(sv) (sv)->sv_u.svu_fp
1330 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
1331 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
1332 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
1333 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xiv_u.xivu_iv
1334 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
1335 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
1336 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
1337 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
1338 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
1339 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
1340 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
1341 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
1342 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
1343 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1344 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1346 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
1347 #define IoTYPE_RDONLY '<'
1348 #define IoTYPE_WRONLY '>'
1349 #define IoTYPE_RDWR '+'
1350 #define IoTYPE_APPEND 'a'
1351 #define IoTYPE_PIPE '|'
1352 #define IoTYPE_STD '-' /* stdin or stdout */
1353 #define IoTYPE_SOCKET 's'
1354 #define IoTYPE_CLOSED ' '
1355 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1356 #define IoTYPE_NUMERIC '#' /* fdopen */
1359 =for apidoc Am|bool|SvTAINTED|SV* sv
1360 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
1363 =for apidoc Am|void|SvTAINTED_on|SV* sv
1364 Marks an SV as tainted if tainting is enabled.
1366 =for apidoc Am|void|SvTAINTED_off|SV* sv
1367 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1368 some of Perl's fundamental security features. XS module authors should not
1369 use this function unless they fully understand all the implications of
1370 unconditionally untainting the value. Untainting should be done in the
1371 standard perl fashion, via a carefully crafted regexp, rather than directly
1372 untainting variables.
1374 =for apidoc Am|void|SvTAINT|SV* sv
1375 Taints an SV if tainting is enabled.
1380 #define sv_taint(sv) sv_magic((sv), NULL, PERL_MAGIC_taint, NULL, 0)
1382 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1383 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
1384 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
1386 #define SvTAINT(sv) \
1388 if (PL_tainting) { \
1395 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
1396 Like C<SvPV> but will force the SV into containing just a string
1397 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1400 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
1401 Like C<SvPV> but will force the SV into containing just a string
1402 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
1403 directly. Doesn't process magic.
1405 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
1406 Returns a pointer to the string in the SV, or a stringified form of
1407 the SV if the SV does not contain a string. The SV may cache the
1408 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
1409 C<SvPVx> for a version which guarantees to evaluate sv only once.
1411 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
1412 A version of C<SvPV> which guarantees to evaluate C<sv> only once.
1413 Only use this if C<sv> is an expression with side effects, otherwise use the
1414 more efficient C<SvPVX>.
1416 =for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1417 Like C<SvPV> but doesn't process magic.
1419 =for apidoc Am|char*|SvPV_nolen|SV* sv
1420 Returns a pointer to the string in the SV, or a stringified form of
1421 the SV if the SV does not contain a string. The SV may cache the
1422 stringified form becoming C<SvPOK>. Handles 'get' magic.
1424 =for apidoc Am|IV|SvIV|SV* sv
1425 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
1426 version which guarantees to evaluate sv only once.
1428 =for apidoc Am|IV|SvIV_nomg|SV* sv
1429 Like C<SvIV> but doesn't process magic.
1431 =for apidoc Am|IV|SvIVx|SV* sv
1432 Coerces the given SV to an integer and returns it. Guarantees to evaluate
1433 C<sv> only once. Only use this if C<sv> is an expression with side effects,
1434 otherwise use the more efficient C<SvIV>.
1436 =for apidoc Am|NV|SvNV|SV* sv
1437 Coerce the given SV to a double and return it. See C<SvNVx> for a version
1438 which guarantees to evaluate sv only once.
1440 =for apidoc Am|NV|SvNV_nomg|SV* sv
1441 Like C<SvNV> but doesn't process magic.
1443 =for apidoc Am|NV|SvNVx|SV* sv
1444 Coerces the given SV to a double and returns it. Guarantees to evaluate
1445 C<sv> only once. Only use this if C<sv> is an expression with side effects,
1446 otherwise use the more efficient C<SvNV>.
1448 =for apidoc Am|UV|SvUV|SV* sv
1449 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
1450 for a version which guarantees to evaluate sv only once.
1452 =for apidoc Am|UV|SvUV_nomg|SV* sv
1453 Like C<SvUV> but doesn't process magic.
1455 =for apidoc Am|UV|SvUVx|SV* sv
1456 Coerces the given SV to an unsigned integer and returns it. Guarantees to
1457 C<sv> only once. Only use this if C<sv> is an expression with side effects,
1458 otherwise use the more efficient C<SvUV>.
1460 =for apidoc Am|bool|SvTRUE|SV* sv
1461 Returns a boolean indicating whether Perl would evaluate the SV as true or
1462 false. See SvOK() for a defined/undefined test. Handles 'get' magic
1463 unless the scalar is already SvPOK, SvIOK or SvNOK (the public, not the
1466 =for apidoc Am|bool|SvTRUE_nomg|SV* sv
1467 Returns a boolean indicating whether Perl would evaluate the SV as true or
1468 false. See SvOK() for a defined/undefined test. Does not handle 'get' magic.
1470 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
1471 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1473 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
1474 Like C<SvPV>, but converts sv to utf8 first if necessary.
1476 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1477 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
1479 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1480 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1482 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1483 Like C<SvPV>, but converts sv to byte representation first if necessary.
1485 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1486 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1488 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1489 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1490 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1493 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1494 Like C<SvPV>, but converts sv to utf8 first if necessary.
1495 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1498 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1499 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1500 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1503 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1504 Like C<SvPV>, but converts sv to byte representation first if necessary.
1505 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1508 =for apidoc Am|bool|SvIsCOW|SV* sv
1509 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1510 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1513 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1514 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1517 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1518 Like C<sv_catpvn> but doesn't process magic.
1520 =for apidoc Am|void|sv_catpv_nomg|SV* sv|const char* ptr
1521 Like C<sv_catpv> but doesn't process magic.
1523 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1524 Like C<sv_setsv> but doesn't process magic.
1526 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1527 Like C<sv_catsv> but doesn't process magic.
1529 =for apidoc Amdb|STRLEN|sv_utf8_upgrade_nomg|NN SV *sv
1531 Like sv_utf8_upgrade, but doesn't do magic on C<sv>
1536 /* Let us hope that bitmaps for UV and IV are the same */
1537 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1538 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1539 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1541 #define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1542 #define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1543 #define SvNV_nomg(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv_flags(sv, 0))
1547 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1548 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1549 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1551 #define SvPV_flags(sv, lp, flags) \
1552 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1553 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1554 #define SvPV_flags_const(sv, lp, flags) \
1555 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1556 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1557 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1558 #define SvPV_flags_const_nolen(sv, flags) \
1559 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1560 ? SvPVX_const(sv) : \
1561 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN))
1562 #define SvPV_flags_mutable(sv, lp, flags) \
1563 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1564 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1565 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1567 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1568 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1569 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1571 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1572 #define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
1574 #define SvPV_force_flags(sv, lp, flags) \
1575 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1576 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1577 #define SvPV_force_flags_nolen(sv, flags) \
1578 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1579 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1580 #define SvPV_force_flags_mutable(sv, lp, flags) \
1581 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1582 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1583 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1585 #define SvPV_nolen(sv) \
1586 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1587 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1589 #define SvPV_nolen_const(sv) \
1590 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1591 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1593 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1594 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1595 #define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
1599 #define SvPVutf8(sv, lp) \
1600 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1601 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1603 #define SvPVutf8_force(sv, lp) \
1604 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1605 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1608 #define SvPVutf8_nolen(sv) \
1609 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1610 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1614 #define SvPVbyte(sv, lp) \
1615 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1616 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1618 #define SvPVbyte_force(sv, lp) \
1619 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1620 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1622 #define SvPVbyte_nolen(sv) \
1623 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1624 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1628 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1629 * var to evaluate the arg once; failing that, use a global if possible;
1630 * failing that, call a function to do the work
1633 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1634 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1635 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1637 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1639 # define SvIVx(sv) ({SV *_sv = MUTABLE_SV(sv); SvIV(_sv); })
1640 # define SvUVx(sv) ({SV *_sv = MUTABLE_SV(sv); SvUV(_sv); })
1641 # define SvNVx(sv) ({SV *_sv = MUTABLE_SV(sv); SvNV(_sv); })
1642 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1643 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1644 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1645 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1646 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1647 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1648 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1649 # define SvTRUE(sv) ( \
1653 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1655 (nxpv->xpv_cur > 1 || \
1656 (nxpv->xpv_cur && *(sv)->sv_u.svu_pv != '0')); }) \
1663 ? SvNVX(sv) != 0.0 \
1665 # define SvTRUE_nomg(sv) ( \
1669 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1671 (nxpv->xpv_cur > 1 || \
1672 (nxpv->xpv_cur && *(sv)->sv_u.svu_pv != '0')); }) \
1679 ? SvNVX(sv) != 0.0 \
1680 : sv_2bool_flags(sv,0) )
1681 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1683 #else /* __GNUC__ */
1685 /* These inlined macros use globals, which will require a thread
1686 * declaration in user code, so we avoid them under threads */
1688 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1689 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1690 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1691 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1692 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1693 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1694 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1695 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1696 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1697 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1698 # define SvTRUE(sv) ( \
1702 ? ((PL_Xpv = (XPV*)SvANY(PL_Sv = (sv))) && \
1703 (PL_Xpv->xpv_cur > 1 || \
1704 (PL_Xpv->xpv_cur && *PL_Sv->sv_u.svu_pv != '0')) \
1711 ? SvNVX(sv) != 0.0 \
1713 # define SvTRUE_nomg(sv) ( \
1717 ? ((PL_Xpv = (XPV*)SvANY(PL_Sv = (sv))) && \
1718 (PL_Xpv->xpv_cur > 1 || \
1719 (PL_Xpv->xpv_cur && *PL_Sv->sv_u.svu_pv != '0')) \
1726 ? SvNVX(sv) != 0.0 \
1727 : sv_2bool_flags(sv,0) )
1728 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1729 #endif /* __GNU__ */
1731 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1732 (SVf_FAKE | SVf_READONLY))
1733 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1735 #define SvSHARED_HEK_FROM_PV(pvx) \
1736 ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
1737 #define SvSHARED_HASH(sv) (0 + SvSHARED_HEK_FROM_PV(SvPVX_const(sv))->hek_hash)
1739 /* flag values for sv_*_flags functions */
1740 #define SV_IMMEDIATE_UNREF 1
1742 #define SV_COW_DROP_PV 4
1743 #define SV_UTF8_NO_ENCODING 8
1744 #define SV_NOSTEAL 16
1745 #define SV_CONST_RETURN 32
1746 #define SV_MUTABLE_RETURN 64
1747 #define SV_SMAGIC 128
1748 #define SV_HAS_TRAILING_NUL 256
1749 #define SV_COW_SHARED_HASH_KEYS 512
1750 /* This one is only enabled for PERL_OLD_COPY_ON_WRITE */
1751 #define SV_COW_OTHER_PVS 1024
1752 /* Make sv_2pv_flags return NULL if something is undefined. */
1753 #define SV_UNDEF_RETURNS_NULL 2048
1754 /* Tell sv_utf8_upgrade() to not check to see if an upgrade is really needed.
1755 * This is used when the caller has already determined it is, and avoids
1757 #define SV_FORCE_UTF8_UPGRADE 4096
1758 /* if (after resolving magic etc), the SV is found to be overloaded,
1759 * don't call the overload magic, just return as-is */
1760 #define SV_SKIP_OVERLOAD 8192
1762 /* The core is safe for this COW optimisation. XS code on CPAN may not be.
1763 So only default to doing the COW setup if we're in the core.
1766 # ifndef SV_DO_COW_SVSETSV
1767 # define SV_DO_COW_SVSETSV SV_COW_SHARED_HASH_KEYS|SV_COW_OTHER_PVS
1771 #ifndef SV_DO_COW_SVSETSV
1772 # define SV_DO_COW_SVSETSV 0
1776 #define sv_unref(sv) sv_unref_flags(sv, 0)
1777 #define sv_force_normal(sv) sv_force_normal_flags(sv, 0)
1778 #define sv_usepvn(sv, p, l) sv_usepvn_flags(sv, p, l, 0)
1779 #define sv_usepvn_mg(sv, p, l) sv_usepvn_flags(sv, p, l, SV_SMAGIC)
1781 /* We are about to replace the SV's current value. So if it's copy on write
1782 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1783 the value is about to get thrown away, so drop the PV rather than go to
1784 the effort of making a read-write copy only for it to get immediately
1787 #define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1788 sv_force_normal_flags(sv, SV_COW_DROP_PV)
1790 #ifdef PERL_OLD_COPY_ON_WRITE
1791 #define SvRELEASE_IVX(sv) \
1792 ((SvIsCOW(sv) ? sv_force_normal_flags(sv, 0) : (void) 0), 0)
1793 # define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
1794 # define SvRELEASE_IVX_(sv) SvRELEASE_IVX(sv),
1796 # define SvRELEASE_IVX(sv) 0
1797 /* This little game brought to you by the need to shut this warning up:
1798 mg.c: In function `Perl_magic_get':
1799 mg.c:1024: warning: left-hand operand of comma expression has no effect
1801 # define SvRELEASE_IVX_(sv) /**/
1802 #endif /* PERL_OLD_COPY_ON_WRITE */
1804 #define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1805 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1806 SVf_OOK|SVf_BREAK|SVf_READONLY)
1807 #define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1809 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1810 sv_force_normal_flags(sv, 0)
1813 /* all these 'functions' are now just macros */
1815 #define sv_pv(sv) SvPV_nolen(sv)
1816 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1817 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1819 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1820 #define sv_utf8_upgrade_flags(sv, flags) sv_utf8_upgrade_flags_grow(sv, flags, 0)
1821 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1822 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1823 #define sv_catpv_nomg(dsv, sstr) sv_catpv_flags(dsv, sstr, 0)
1824 #define sv_setsv(dsv, ssv) \
1825 sv_setsv_flags(dsv, ssv, SV_GMAGIC|SV_DO_COW_SVSETSV)
1826 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_DO_COW_SVSETSV)
1827 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1828 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1829 #define sv_catsv_mg(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC|SV_SMAGIC)
1830 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1831 #define sv_catpvn_mg(sv, sstr, slen) \
1832 sv_catpvn_flags(sv, sstr, slen, SV_GMAGIC|SV_SMAGIC);
1833 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1834 #define sv_2pv_nolen(sv) sv_2pv(sv, 0)
1835 #define sv_2pvbyte_nolen(sv) sv_2pvbyte(sv, 0)
1836 #define sv_2pvutf8_nolen(sv) sv_2pvutf8(sv, 0)
1837 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1838 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1839 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1840 #define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1841 #define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
1842 #define sv_2nv(sv) sv_2nv_flags(sv, SV_GMAGIC)
1843 #define sv_eq(sv1, sv2) sv_eq_flags(sv1, sv2, SV_GMAGIC)
1844 #define sv_collxfrm(sv, nxp) sv_cmp_flags(sv, nxp, SV_GMAGIC)
1845 #define sv_2bool(sv) sv_2bool_flags(sv, SV_GMAGIC)
1846 #define sv_insert(bigstr, offset, len, little, littlelen) \
1847 Perl_sv_insert_flags(aTHX_ (bigstr),(offset), (len), (little), \
1848 (littlelen), SV_GMAGIC)
1850 /* Should be named SvCatPVN_utf8_upgrade? */
1851 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1854 nsv = newSVpvn_flags(sstr, slen, SVs_TEMP); \
1856 sv_setpvn(nsv, sstr, slen); \
1858 sv_utf8_upgrade(nsv); \
1859 sv_catsv(dsv, nsv); \
1863 =for apidoc Am|SV*|newRV_inc|SV* sv
1865 Creates an RV wrapper for an SV. The reference count for the original SV is
1871 #define newRV_inc(sv) newRV(sv)
1873 /* the following macros update any magic values this sv is associated with */
1876 =head1 Magical Functions
1878 =for apidoc Am|void|SvGETMAGIC|SV* sv
1879 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1880 argument more than once.
1882 =for apidoc Am|void|SvSETMAGIC|SV* sv
1883 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1884 argument more than once.
1886 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1887 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1890 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1891 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1892 ssv. May evaluate arguments more than once.
1894 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1895 Like C<SvSetSV>, but does any set magic required afterwards.
1897 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1898 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1900 =for apidoc Am|void|SvSHARE|SV* sv
1901 Arranges for sv to be shared between threads if a suitable module
1904 =for apidoc Am|void|SvLOCK|SV* sv
1905 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1908 =for apidoc Am|void|SvUNLOCK|SV* sv
1909 Releases a mutual exclusion lock on sv if a suitable module
1912 =head1 SV Manipulation Functions
1914 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1915 Expands the character buffer in the SV so that it has room for the
1916 indicated number of bytes (remember to reserve space for an extra trailing
1917 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1918 Returns a pointer to the character buffer.
1923 #define SvSHARE(sv) PL_sharehook(aTHX_ sv)
1924 #define SvLOCK(sv) PL_lockhook(aTHX_ sv)
1925 #define SvUNLOCK(sv) PL_unlockhook(aTHX_ sv)
1926 #define SvDESTROYABLE(sv) PL_destroyhook(aTHX_ sv)
1928 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1929 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1931 #define SvSetSV_and(dst,src,finally) \
1933 if ((dst) != (src)) { \
1934 sv_setsv(dst, src); \
1938 #define SvSetSV_nosteal_and(dst,src,finally) \
1940 if ((dst) != (src)) { \
1941 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL | SV_DO_COW_SVSETSV); \
1946 #define SvSetSV(dst,src) \
1947 SvSetSV_and(dst,src,/*nothing*/;)
1948 #define SvSetSV_nosteal(dst,src) \
1949 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1951 #define SvSetMagicSV(dst,src) \
1952 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1953 #define SvSetMagicSV_nosteal(dst,src) \
1954 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1957 #if !defined(SKIP_DEBUGGING)
1958 #define SvPEEK(sv) sv_peek(sv)
1960 #define SvPEEK(sv) ""
1963 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1965 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1967 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1968 /* If I give every macro argument a different name, then there won't be bugs
1969 where nested macros get confused. Been there, done that. */
1970 #define isGV_with_GP(pwadak) \
1971 (((SvFLAGS(pwadak) & (SVp_POK|SVpgv_GP)) == SVpgv_GP) \
1972 && (SvTYPE(pwadak) == SVt_PVGV || SvTYPE(pwadak) == SVt_PVLV))
1973 #define isGV_with_GP_on(sv) STMT_START { \
1974 assert (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVLV); \
1975 assert (!SvPOKp(sv)); \
1976 assert (!SvIOKp(sv)); \
1977 (SvFLAGS(sv) |= SVpgv_GP); \
1979 #define isGV_with_GP_off(sv) STMT_START { \
1980 assert (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVLV); \
1981 assert (!SvPOKp(sv)); \
1982 assert (!SvIOKp(sv)); \
1983 (SvFLAGS(sv) &= ~SVpgv_GP); \
1987 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1988 #define SvGROW_mutable(sv,len) \
1989 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
1990 #define Sv_Grow sv_grow
1992 #define CLONEf_COPY_STACKS 1
1993 #define CLONEf_KEEP_PTR_TABLE 2
1994 #define CLONEf_CLONE_HOST 4
1995 #define CLONEf_JOIN_IN 8
1997 struct clone_params {
2000 PerlInterpreter *proto_perl;
2001 PerlInterpreter *new_perl;
2006 =for apidoc Am|SV*|newSVpvn_utf8|NULLOK const char* s|STRLEN len|U32 utf8
2008 Creates a new SV and copies a string into it. If utf8 is true, calls
2009 C<SvUTF8_on> on the new SV. Implemented as a wrapper around C<newSVpvn_flags>.
2014 #define newSVpvn_utf8(s, len, u) newSVpvn_flags((s), (len), (u) ? SVf_UTF8 : 0)
2017 =for apidoc Am|void|SvOOK_offset|NN SV*sv|STRLEN len
2019 Reads into I<len> the offset from SvPVX back to the true start of the
2020 allocated buffer, which will be non-zero if C<sv_chop> has been used to
2021 efficiently remove characters from start of the buffer. Implemented as a
2022 macro, which takes the address of I<len>, which must be of type C<STRLEN>.
2023 Evaluates I<sv> more than once. Sets I<len> to 0 if C<SvOOK(sv)> is false.
2029 /* Does the bot know something I don't?
2030 10:28 <@Nicholas> metabatman
2031 10:28 <+meta> Nicholas: crash
2033 # define SvOOK_offset(sv, offset) STMT_START { \
2034 assert(sizeof(offset) == sizeof(STRLEN)); \
2036 const U8 *crash = (U8*)SvPVX_const(sv); \
2037 offset = *--crash; \
2039 crash -= sizeof(STRLEN); \
2040 Copy(crash, (U8 *)&offset, sizeof(STRLEN), U8); \
2043 /* Validate the preceding buffer's sentinels to \
2044 verify that no-one is using it. */ \
2045 const U8 *const bonk = (U8 *) SvPVX_const(sv) - offset; \
2046 while (crash > bonk) { \
2048 assert (*crash == (U8)PTR2UV(crash)); \
2056 /* This is the same code, but avoids using any temporary variables: */
2057 # define SvOOK_offset(sv, offset) STMT_START { \
2058 assert(sizeof(offset) == sizeof(STRLEN)); \
2060 offset = ((U8*)SvPVX_const(sv))[-1]; \
2062 Copy(SvPVX_const(sv) - 1 - sizeof(STRLEN), \
2063 (U8 *)&offset, sizeof(STRLEN), U8); \
2071 #define newIO() MUTABLE_IO(newSV_type(SVt_PVIO))
2075 * c-indentation-style: bsd
2077 * indent-tabs-mode: t
2080 * ex: set ts=8 sts=4 sw=4 noet: