3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 #undef sv_flags /* Convex has this in <signal.h> for sigvec() */
18 =for apidoc AmU||svtype
19 An enum of flags for Perl types. These are found in the file B<sv.h>
20 in the C<svtype> enum. Test these flags with the C<SvTYPE> macro.
22 =for apidoc AmU||SVt_PV
23 Pointer type flag for scalars. See C<svtype>.
25 =for apidoc AmU||SVt_IV
26 Integer type flag for scalars. See C<svtype>.
28 =for apidoc AmU||SVt_NV
29 Double type flag for scalars. See C<svtype>.
31 =for apidoc AmU||SVt_PVMG
32 Type flag for blessed scalars. See C<svtype>.
34 =for apidoc AmU||SVt_PVAV
35 Type flag for arrays. See C<svtype>.
37 =for apidoc AmU||SVt_PVHV
38 Type flag for hashes. See C<svtype>.
40 =for apidoc AmU||SVt_PVCV
41 Type flag for code refs. See C<svtype>.
65 /* Using C's structural equivalence to help emulate C++ inheritance here... */
67 struct STRUCT_SV { /* struct sv { */
68 void* sv_any; /* pointer to something */
69 U32 sv_refcnt; /* how many references to us */
70 U32 sv_flags; /* what we are */
74 XPVGV* sv_any; /* pointer to something */
75 U32 sv_refcnt; /* how many references to us */
76 U32 sv_flags; /* what we are */
80 XPVCV* sv_any; /* pointer to something */
81 U32 sv_refcnt; /* how many references to us */
82 U32 sv_flags; /* what we are */
86 XPVAV* sv_any; /* pointer to something */
87 U32 sv_refcnt; /* how many references to us */
88 U32 sv_flags; /* what we are */
92 XPVHV* sv_any; /* pointer to something */
93 U32 sv_refcnt; /* how many references to us */
94 U32 sv_flags; /* what we are */
98 XPVIO* sv_any; /* pointer to something */
99 U32 sv_refcnt; /* how many references to us */
100 U32 sv_flags; /* what we are */
104 =head1 SV Manipulation Functions
106 =for apidoc Am|U32|SvREFCNT|SV* sv
107 Returns the value of the object's reference count.
109 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
110 Increments the reference count of the given SV.
112 =for apidoc Am|void|SvREFCNT_dec|SV* sv
113 Decrements the reference count of the given SV.
115 =for apidoc Am|svtype|SvTYPE|SV* sv
116 Returns the type of the SV. See C<svtype>.
118 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
119 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
120 perform the upgrade if necessary. See C<svtype>.
125 #define SvANY(sv) (sv)->sv_any
126 #define SvFLAGS(sv) (sv)->sv_flags
127 #define SvREFCNT(sv) (sv)->sv_refcnt
129 #ifdef USE_5005THREADS
132 # define ATOMIC_INC(count) __ATOMIC_INCREMENT_LONG(&count)
133 # define ATOMIC_DEC_AND_TEST(res,count) res=(1==__ATOMIC_DECREMENT_LONG(&count))
135 # ifdef EMULATE_ATOMIC_REFCOUNTS
136 # define ATOMIC_INC(count) STMT_START { \
137 MUTEX_LOCK(&PL_svref_mutex); \
139 MUTEX_UNLOCK(&PL_svref_mutex); \
141 # define ATOMIC_DEC_AND_TEST(res,count) STMT_START { \
142 MUTEX_LOCK(&PL_svref_mutex); \
143 res = (--count == 0); \
144 MUTEX_UNLOCK(&PL_svref_mutex); \
147 # define ATOMIC_INC(count) atomic_inc(&count)
148 # define ATOMIC_DEC_AND_TEST(res,count) (res = atomic_dec_and_test(&count))
149 # endif /* EMULATE_ATOMIC_REFCOUNTS */
152 # define ATOMIC_INC(count) (++count)
153 # define ATOMIC_DEC_AND_TEST(res, count) (res = (--count == 0))
154 #endif /* USE_5005THREADS */
156 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
157 # define SvREFCNT_inc(sv) \
159 SV *_sv = (SV*)(sv); \
161 ATOMIC_INC(SvREFCNT(_sv)); \
165 # ifdef USE_5005THREADS
166 # if defined(VMS) && defined(__ALPHA)
167 # define SvREFCNT_inc(sv) \
168 (PL_Sv=(SV*)(sv), (PL_Sv && __ATOMIC_INCREMENT_LONG(&(SvREFCNT(PL_Sv)))), (SV *)PL_Sv)
170 # define SvREFCNT_inc(sv) sv_newref((SV*)sv)
173 # define SvREFCNT_inc(sv) \
174 ((PL_Sv=(SV*)(sv)), (PL_Sv && ATOMIC_INC(SvREFCNT(PL_Sv))), (SV*)PL_Sv)
178 #define SvREFCNT_dec(sv) sv_free((SV*)(sv))
180 #define SVTYPEMASK 0xff
181 #define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK)
183 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= mt || sv_upgrade(sv, mt))
185 #define SVs_PADBUSY 0x00000100 /* reserved for tmp or my already */
186 #define SVs_PADTMP 0x00000200 /* in use as tmp */
187 #define SVs_PADMY 0x00000400 /* in use a "my" variable */
188 #define SVs_TEMP 0x00000800 /* string is stealable? */
189 #define SVs_OBJECT 0x00001000 /* is "blessed" */
190 #define SVs_GMG 0x00002000 /* has magical get method */
191 #define SVs_SMG 0x00004000 /* has magical set method */
192 #define SVs_RMG 0x00008000 /* has random magical methods */
194 #define SVf_IOK 0x00010000 /* has valid public integer value */
195 #define SVf_NOK 0x00020000 /* has valid public numeric value */
196 #define SVf_POK 0x00040000 /* has valid public pointer value */
197 #define SVf_ROK 0x00080000 /* has a valid reference pointer */
199 #define SVf_FAKE 0x00100000 /* glob or lexical is just a copy */
200 #define SVf_OOK 0x00200000 /* has valid offset value */
201 #define SVf_BREAK 0x00400000 /* refcnt is artificially low - used
202 * by SV's in final arena cleanup */
203 #define SVf_READONLY 0x00800000 /* may not be modified */
206 #define SVp_IOK 0x01000000 /* has valid non-public integer value */
207 #define SVp_NOK 0x02000000 /* has valid non-public numeric value */
208 #define SVp_POK 0x04000000 /* has valid non-public pointer value */
209 #define SVp_SCREAM 0x08000000 /* has been studied? */
211 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded */
213 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
215 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
216 SVp_IOK|SVp_NOK|SVp_POK)
218 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
220 #define PRIVSHIFT 8 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
222 /* Some private flags. */
224 /* SVpad_OUR may be set on SVt_PV{NV,MG,GV} types */
225 #define SVpad_OUR 0x80000000 /* pad name is "our" instead of "my" */
226 #define SVpad_TYPED 0x40000000 /* Typed Lexical */
228 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
230 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
232 #define SVpbm_VALID 0x80000000
233 #define SVpbm_TAIL 0x40000000
235 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
237 #define SVphv_CLONEABLE 0x08000000 /* for stashes: clone its objects */
238 #define SVphv_REHASH 0x10000000 /* HV is recalculating hash values */
239 #define SVphv_SHAREKEYS 0x20000000 /* keys live on shared string table */
240 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
241 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
243 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
246 SV * xrv_rv; /* pointer to another SV */
250 char * xpv_pv; /* pointer to malloced string */
251 STRLEN xpv_cur; /* length of xpv_pv as a C string */
252 STRLEN xpv_len; /* allocated size */
256 char * xpv_pv; /* pointer to malloced string */
257 STRLEN xpv_cur; /* length of xpv_pv as a C string */
258 STRLEN xpv_len; /* allocated size */
259 IV xiv_iv; /* integer value or pv offset */
263 char * xpv_pv; /* pointer to malloced string */
264 STRLEN xpv_cur; /* length of xpv_pv as a C string */
265 STRLEN xpv_len; /* allocated size */
266 UV xuv_uv; /* unsigned value or pv offset */
270 char * xpv_pv; /* pointer to malloced string */
271 STRLEN xpv_cur; /* length of xpv_pv as a C string */
272 STRLEN xpv_len; /* allocated size */
273 IV xiv_iv; /* integer value or pv offset */
274 NV xnv_nv; /* numeric value, if any */
277 /* These structure must match the beginning of struct xpvhv in hv.h. */
279 char * xpv_pv; /* pointer to malloced string */
280 STRLEN xpv_cur; /* length of xpv_pv as a C string */
281 STRLEN xpv_len; /* allocated size */
282 IV xiv_iv; /* integer value or pv offset */
283 NV xnv_nv; /* numeric value, if any */
284 MAGIC* xmg_magic; /* linked list of magicalness */
285 HV* xmg_stash; /* class package */
289 char * xpv_pv; /* pointer to malloced string */
290 STRLEN xpv_cur; /* length of xpv_pv as a C string */
291 STRLEN xpv_len; /* allocated size */
292 IV xiv_iv; /* integer value or pv offset */
293 NV xnv_nv; /* numeric value, if any */
294 MAGIC* xmg_magic; /* linked list of magicalness */
295 HV* xmg_stash; /* class package */
300 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
301 * y=alem/helem/iter t=tie T=tied HE */
305 char * xpv_pv; /* pointer to malloced string */
306 STRLEN xpv_cur; /* length of xpv_pv as a C string */
307 STRLEN xpv_len; /* allocated size */
308 IV xiv_iv; /* integer value or pv offset */
309 NV xnv_nv; /* numeric value, if any */
310 MAGIC* xmg_magic; /* linked list of magicalness */
311 HV* xmg_stash; /* class package */
321 char * xpv_pv; /* pointer to malloced string */
322 STRLEN xpv_cur; /* length of xpv_pv as a C string */
323 STRLEN xpv_len; /* allocated size */
324 IV xiv_iv; /* integer value or pv offset */
325 NV xnv_nv; /* numeric value, if any */
326 MAGIC* xmg_magic; /* linked list of magicalness */
327 HV* xmg_stash; /* class package */
329 I32 xbm_useful; /* is this constant pattern being useful? */
330 U16 xbm_previous; /* how many characters in string before rare? */
331 U8 xbm_rare; /* rarest character in string */
334 /* This structure must match XPVCV in cv.h */
336 typedef U16 cv_flags_t;
339 char * xpv_pv; /* pointer to malloced string */
340 STRLEN xpv_cur; /* length of xpv_pv as a C string */
341 STRLEN xpv_len; /* allocated size */
342 IV xiv_iv; /* integer value or pv offset */
343 NV xnv_nv; /* numeric value, if any */
344 MAGIC* xmg_magic; /* linked list of magicalness */
345 HV* xmg_stash; /* class package */
350 void (*xcv_xsub)(pTHX_ CV*);
354 long xcv_depth; /* >= 2 indicates recursive call */
357 #ifdef USE_5005THREADS
358 perl_mutex *xcv_mutexp; /* protects xcv_owner */
359 struct perl_thread *xcv_owner; /* current owner thread */
360 #endif /* USE_5005THREADS */
361 cv_flags_t xcv_flags;
362 U32 xcv_outside_seq; /* the COP sequence (at the point of our
363 * compilation) in the lexically enclosing
369 char * xpv_pv; /* pointer to malloced string */
370 STRLEN xpv_cur; /* length of xpv_pv as a C string */
371 STRLEN xpv_len; /* allocated size */
372 IV xiv_iv; /* integer value or pv offset */
373 NV xnv_nv; /* numeric value, if any */
374 MAGIC* xmg_magic; /* linked list of magicalness */
375 HV* xmg_stash; /* class package */
377 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
378 PerlIO * xio_ofp; /* but sockets need separate streams */
379 /* Cray addresses everything by word boundaries (64 bits) and
380 * code and data pointers cannot be mixed (which is exactly what
381 * Perl_filter_add() tries to do with the dirp), hence the following
382 * union trick (as suggested by Gurusamy Sarathy).
383 * For further information see Geir Johansen's problem report titled
384 [ID 20000612.002] Perl problem on Cray system
385 * The any pointer (known as IoANY()) will also be a good place
386 * to hang any IO disciplines to.
389 DIR * xiou_dirp; /* for opendir, readdir, etc */
390 void * xiou_any; /* for alignment */
392 IV xio_lines; /* $. */
393 IV xio_page; /* $% */
394 IV xio_page_len; /* $= */
395 IV xio_lines_left; /* $- */
396 char * xio_top_name; /* $^ */
397 GV * xio_top_gv; /* $^ */
398 char * xio_fmt_name; /* $~ */
399 GV * xio_fmt_gv; /* $~ */
400 char * xio_bottom_name;/* $^B */
401 GV * xio_bottom_gv; /* $^B */
402 short xio_subprocess; /* -| or |- */
406 #define xio_dirp xio_dirpu.xiou_dirp
407 #define xio_any xio_dirpu.xiou_any
409 #define IOf_ARGV 1 /* this fp iterates over ARGV */
410 #define IOf_START 2 /* check for null ARGV and substitute '-' */
411 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
412 #define IOf_DIDTOP 8 /* just did top of form */
413 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
414 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
415 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
417 /* The following macros define implementation-independent predicates on SVs. */
420 =for apidoc Am|bool|SvNIOK|SV* sv
421 Returns a boolean indicating whether the SV contains a number, integer or
424 =for apidoc Am|bool|SvNIOKp|SV* sv
425 Returns a boolean indicating whether the SV contains a number, integer or
426 double. Checks the B<private> setting. Use C<SvNIOK>.
428 =for apidoc Am|void|SvNIOK_off|SV* sv
429 Unsets the NV/IV status of an SV.
431 =for apidoc Am|bool|SvOK|SV* sv
432 Returns a boolean indicating whether the value is an SV. It also tells
433 whether the value is defined or not.
435 =for apidoc Am|bool|SvIOKp|SV* sv
436 Returns a boolean indicating whether the SV contains an integer. Checks
437 the B<private> setting. Use C<SvIOK>.
439 =for apidoc Am|bool|SvNOKp|SV* sv
440 Returns a boolean indicating whether the SV contains a double. Checks the
441 B<private> setting. Use C<SvNOK>.
443 =for apidoc Am|bool|SvPOKp|SV* sv
444 Returns a boolean indicating whether the SV contains a character string.
445 Checks the B<private> setting. Use C<SvPOK>.
447 =for apidoc Am|bool|SvIOK|SV* sv
448 Returns a boolean indicating whether the SV contains an integer.
450 =for apidoc Am|void|SvIOK_on|SV* sv
451 Tells an SV that it is an integer.
453 =for apidoc Am|void|SvIOK_off|SV* sv
454 Unsets the IV status of an SV.
456 =for apidoc Am|void|SvIOK_only|SV* sv
457 Tells an SV that it is an integer and disables all other OK bits.
459 =for apidoc Am|void|SvIOK_only_UV|SV* sv
460 Tells and SV that it is an unsigned integer and disables all other OK bits.
462 =for apidoc Am|bool|SvIOK_UV|SV* sv
463 Returns a boolean indicating whether the SV contains an unsigned integer.
465 =for apidoc Am|void|SvUOK|SV* sv
466 Returns a boolean indicating whether the SV contains an unsigned integer.
468 =for apidoc Am|bool|SvIOK_notUV|SV* sv
469 Returns a boolean indicating whether the SV contains a signed integer.
471 =for apidoc Am|bool|SvNOK|SV* sv
472 Returns a boolean indicating whether the SV contains a double.
474 =for apidoc Am|void|SvNOK_on|SV* sv
475 Tells an SV that it is a double.
477 =for apidoc Am|void|SvNOK_off|SV* sv
478 Unsets the NV status of an SV.
480 =for apidoc Am|void|SvNOK_only|SV* sv
481 Tells an SV that it is a double and disables all other OK bits.
483 =for apidoc Am|bool|SvPOK|SV* sv
484 Returns a boolean indicating whether the SV contains a character
487 =for apidoc Am|void|SvPOK_on|SV* sv
488 Tells an SV that it is a string.
490 =for apidoc Am|void|SvPOK_off|SV* sv
491 Unsets the PV status of an SV.
493 =for apidoc Am|void|SvPOK_only|SV* sv
494 Tells an SV that it is a string and disables all other OK bits.
495 Will also turn off the UTF-8 status.
497 =for apidoc Am|bool|SvOOK|SV* sv
498 Returns a boolean indicating whether the SvIVX is a valid offset value for
499 the SvPVX. This hack is used internally to speed up removal of characters
500 from the beginning of a SvPV. When SvOOK is true, then the start of the
501 allocated string buffer is really (SvPVX - SvIVX).
503 =for apidoc Am|bool|SvROK|SV* sv
504 Tests if the SV is an RV.
506 =for apidoc Am|void|SvROK_on|SV* sv
507 Tells an SV that it is an RV.
509 =for apidoc Am|void|SvROK_off|SV* sv
510 Unsets the RV status of an SV.
512 =for apidoc Am|SV*|SvRV|SV* sv
513 Dereferences an RV to return the SV.
515 =for apidoc Am|IV|SvIVX|SV* sv
516 Returns the raw value in the SV's IV slot, without checks or conversions.
517 Only use when you are sure SvIOK is true. See also C<SvIV()>.
519 =for apidoc Am|UV|SvUVX|SV* sv
520 Returns the raw value in the SV's UV slot, without checks or conversions.
521 Only use when you are sure SvIOK is true. See also C<SvUV()>.
523 =for apidoc Am|NV|SvNVX|SV* sv
524 Returns the raw value in the SV's NV slot, without checks or conversions.
525 Only use when you are sure SvNOK is true. See also C<SvNV()>.
527 =for apidoc Am|char*|SvPVX|SV* sv
528 Returns a pointer to the physical string in the SV. The SV must contain a
531 =for apidoc Am|STRLEN|SvCUR|SV* sv
532 Returns the length of the string which is in the SV. See C<SvLEN>.
534 =for apidoc Am|STRLEN|SvLEN|SV* sv
535 Returns the size of the string buffer in the SV, not including any part
536 attributable to C<SvOOK>. See C<SvCUR>.
538 =for apidoc Am|char*|SvEND|SV* sv
539 Returns a pointer to the last character in the string which is in the SV.
540 See C<SvCUR>. Access the character as *(SvEND(sv)).
542 =for apidoc Am|HV*|SvSTASH|SV* sv
543 Returns the stash of the SV.
545 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
546 Set the length of the string which is in the SV. See C<SvCUR>.
551 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
552 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
553 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
554 SVp_IOK|SVp_NOK|SVf_IVisUV))
556 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
557 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
559 #define assert_not_ROK(sv)
562 #define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
563 #define SvOK_off(sv) (assert_not_ROK(sv) \
564 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
565 SVf_IVisUV|SVf_UTF8), \
567 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
568 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
572 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
573 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
574 #define SvIOKp_on(sv) ((void)SvOOK_off(sv), SvFLAGS(sv) |= SVp_IOK)
575 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
576 #define SvNOKp_on(sv) (SvFLAGS(sv) |= SVp_NOK)
577 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
578 #define SvPOKp_on(sv) (assert_not_ROK(sv) \
579 SvFLAGS(sv) |= SVp_POK)
581 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
582 #define SvIOK_on(sv) ((void)SvOOK_off(sv), \
583 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
584 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
585 #define SvIOK_only(sv) (SvOK_off(sv), \
586 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
587 #define SvIOK_only_UV(sv) (SvOK_off_exc_UV(sv), \
588 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
590 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
591 == (SVf_IOK|SVf_IVisUV))
592 #define SvUOK(sv) SvIOK_UV(sv)
593 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
596 #define SvVOK(sv) (SvMAGICAL(sv) && mg_find(sv,'V'))
597 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
598 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
599 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
601 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
602 #define SvNOK_on(sv) (SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
603 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
604 #define SvNOK_only(sv) (SvOK_off(sv), \
605 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
608 =for apidoc Am|bool|SvUTF8|SV* sv
609 Returns a boolean indicating whether the SV contains UTF-8 encoded data.
611 =for apidoc Am|void|SvUTF8_on|SV *sv
612 Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
613 Do not use frivolously.
615 =for apidoc Am|void|SvUTF8_off|SV *sv
616 Unsets the UTF-8 status of an SV.
618 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
619 Tells an SV that it is a string and disables all other OK bits,
620 and leaves the UTF-8 status as it was.
625 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
626 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
627 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
629 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
630 #define SvPOK_on(sv) (assert_not_ROK(sv) \
631 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
632 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
633 #define SvPOK_only(sv) (assert_not_ROK(sv) \
634 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
635 SVf_IVisUV|SVf_UTF8), \
636 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
637 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) \
638 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
640 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
642 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
643 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
644 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
646 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
647 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
648 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
650 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
651 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
652 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVf_AMAGIC))
654 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
655 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
656 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
658 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
659 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
660 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
662 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
663 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
664 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
666 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
667 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
668 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
670 #define SvAMAGIC(sv) (SvFLAGS(sv) & SVf_AMAGIC)
671 #define SvAMAGIC_on(sv) (SvFLAGS(sv) |= SVf_AMAGIC)
672 #define SvAMAGIC_off(sv) (SvFLAGS(sv) &= ~SVf_AMAGIC)
674 #define SvGAMAGIC(sv) (SvFLAGS(sv) & (SVs_GMG|SVf_AMAGIC))
677 #define Gv_AMG(stash) \
678 (HV_AMAGICmb(stash) && \
679 ((!HV_AMAGICbad(stash) && HV_AMAGIC(stash)) || Gv_AMupdate(stash)))
681 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
683 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
684 == (SVf_ROK|SVprv_WEAKREF))
685 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
686 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
688 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
690 #define SvPADBUSY(sv) (SvFLAGS(sv) & SVs_PADBUSY)
692 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
693 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP|SVs_PADBUSY)
694 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
696 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
697 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY|SVs_PADBUSY)
699 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
700 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
701 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
703 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
704 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
705 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
707 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
708 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
709 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
711 #define SvSCREAM(sv) (SvFLAGS(sv) & SVp_SCREAM)
712 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
713 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
715 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
716 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
717 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
719 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
720 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
721 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
723 #define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL)
724 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
725 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
727 #define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
728 #define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
729 #define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
732 /* The following uses the FAKE flag to show that a regex pointer is infact
733 its own offset in the regexpad for ithreads */
734 #define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
735 #define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
736 #define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
739 #define SvRV(sv) ((XRV*) SvANY(sv))->xrv_rv
740 #define SvRVx(sv) SvRV(sv)
742 #define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
743 #define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
744 #define SvNVX(sv) ((XPVNV*)SvANY(sv))->xnv_nv
745 #define SvPVX(sv) ((XPV*) SvANY(sv))->xpv_pv
746 #define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
747 #define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
748 #define SvEND(sv)(((XPV*) SvANY(sv))->xpv_pv + ((XPV*)SvANY(sv))->xpv_cur)
750 #define SvIVXx(sv) SvIVX(sv)
751 #define SvUVXx(sv) SvUVX(sv)
752 #define SvNVXx(sv) SvNVX(sv)
753 #define SvPVXx(sv) SvPVX(sv)
754 #define SvLENx(sv) SvLEN(sv)
755 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
756 #define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
757 #define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
759 /* Ask a scalar nicely to try to become an IV, if possible.
760 Not guaranteed to stay returning void */
761 /* Macro won't actually call sv_2iv if already IOK */
762 #define SvIV_please(sv) \
763 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
764 (void) SvIV(sv); } STMT_END
765 /* Put the asserts back at some point and figure out where they reveal bugs
767 #define SvIV_set(sv, val) \
768 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
769 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
770 #define SvNV_set(sv, val) \
771 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
772 (((XPVNV*)SvANY(sv))->xnv_nv = (val)); } STMT_END
773 /* assert(SvTYPE(sv) >= SVt_PV); */
774 #define SvPV_set(sv, val) \
776 (((XPV*) SvANY(sv))->xpv_pv = (val)); } STMT_END
777 /* assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); */
778 #define SvUV_set(sv, val) \
780 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
781 /* assert(SvTYPE(sv) >= SVt_RV); */
782 #define SvRV_set(sv, val) \
784 (((XRV*)SvANY(sv))->xrv_rv = (val)); } STMT_END
785 /* assert(SvTYPE(sv) >= SVt_PVMG); */
786 #define SvMAGIC_set(sv, val) \
788 (((XPVMG*)SvANY(sv))->xmg_magic = (val)); } STMT_END
789 /* assert(SvTYPE(sv) >= SVt_PVMG); */
790 #define SvSTASH_set(sv, val) \
792 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
793 /* assert(SvTYPE(sv) >= SVt_PV); */
794 #define SvCUR_set(sv, val) \
796 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
797 /* assert(SvTYPE(sv) >= SVt_PV); */
798 #define SvLEN_set(sv, val) \
800 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
801 #define SvEND_set(sv, val) \
802 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
803 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
805 #define SvPV_free(sv) \
806 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
809 Safefree(SvPVX(sv) - SvIVX(sv)); \
810 SvFLAGS(sv) &= ~SVf_OOK; \
812 Safefree(SvPVX(sv)); \
817 #define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
818 #define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
819 #define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
821 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
823 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
824 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
825 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
826 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
828 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
829 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
830 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
831 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
832 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
833 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
834 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
835 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
836 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
837 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
838 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
839 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
840 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
841 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
842 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
843 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
844 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
846 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
847 #define IoTYPE_RDONLY '<'
848 #define IoTYPE_WRONLY '>'
849 #define IoTYPE_RDWR '+'
850 #define IoTYPE_APPEND 'a'
851 #define IoTYPE_PIPE '|'
852 #define IoTYPE_STD '-' /* stdin or stdout */
853 #define IoTYPE_SOCKET 's'
854 #define IoTYPE_CLOSED ' '
855 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
856 #define IoTYPE_NUMERIC '#' /* fdopen */
859 =for apidoc Am|bool|SvTAINTED|SV* sv
860 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
863 =for apidoc Am|void|SvTAINTED_on|SV* sv
864 Marks an SV as tainted if tainting is enabled.
866 =for apidoc Am|void|SvTAINTED_off|SV* sv
867 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
868 some of Perl's fundamental security features. XS module authors should not
869 use this function unless they fully understand all the implications of
870 unconditionally untainting the value. Untainting should be done in the
871 standard perl fashion, via a carefully crafted regexp, rather than directly
872 untainting variables.
874 =for apidoc Am|void|SvTAINT|SV* sv
875 Taints an SV if tainting is enabled.
880 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
881 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
882 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
884 #define SvTAINT(sv) \
893 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
894 Like C<SvPV> but will force the SV into containing just a string
895 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
898 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
899 Like C<SvPV> but will force the SV into containing just a string
900 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
901 directly. Doesn't process magic.
903 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
904 Returns a pointer to the string in the SV, or a stringified form of
905 the SV if the SV does not contain a string. The SV may cache the
906 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
907 C<SvPVx> for a version which guarantees to evaluate sv only once.
909 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
910 A version of C<SvPV> which guarantees to evaluate sv only once.
912 =for apidoc Am|char*|SvPV_nolen|SV* sv
913 Returns a pointer to the string in the SV, or a stringified form of
914 the SV if the SV does not contain a string. The SV may cache the
915 stringified form becoming C<SvPOK>. Handles 'get' magic.
917 =for apidoc Am|IV|SvIV|SV* sv
918 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
919 version which guarantees to evaluate sv only once.
921 =for apidoc Am|IV|SvIVx|SV* sv
922 Coerces the given SV to an integer and returns it. Guarantees to evaluate
923 sv only once. Use the more efficient C<SvIV> otherwise.
925 =for apidoc Am|NV|SvNV|SV* sv
926 Coerce the given SV to a double and return it. See C<SvNVx> for a version
927 which guarantees to evaluate sv only once.
929 =for apidoc Am|NV|SvNVx|SV* sv
930 Coerces the given SV to a double and returns it. Guarantees to evaluate
931 sv only once. Use the more efficient C<SvNV> otherwise.
933 =for apidoc Am|UV|SvUV|SV* sv
934 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
935 for a version which guarantees to evaluate sv only once.
937 =for apidoc Am|UV|SvUVx|SV* sv
938 Coerces the given SV to an unsigned integer and returns it. Guarantees to
939 evaluate sv only once. Use the more efficient C<SvUV> otherwise.
941 =for apidoc Am|bool|SvTRUE|SV* sv
942 Returns a boolean indicating whether Perl would evaluate the SV as true or
943 false, defined or undefined. Does not handle 'get' magic.
945 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
946 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
948 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
949 Like C<SvPV>, but converts sv to utf8 first if necessary.
951 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
952 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
954 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
955 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
957 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
958 Like C<SvPV>, but converts sv to byte representation first if necessary.
960 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
961 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
963 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
964 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
965 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
968 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
969 Like C<SvPV>, but converts sv to utf8 first if necessary.
970 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
973 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
974 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
975 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
978 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
979 Like C<SvPV>, but converts sv to byte representation first if necessary.
980 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
983 =for apidoc Am|bool|SvIsCOW|SV* sv
984 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
985 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
988 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
989 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
992 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
993 Like C<sv_catpvn> but doesn't process magic.
995 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
996 Like C<sv_setsv> but doesn't process magic.
998 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
999 Like C<sv_catsv> but doesn't process magic.
1004 /* Let us hope that bitmaps for UV and IV are the same */
1005 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1006 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1007 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1011 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1013 #define SvPV_flags(sv, lp, flags) \
1014 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1015 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1017 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1019 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1021 #define SvPV_force_flags(sv, lp, flags) \
1022 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1023 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1025 #define SvPV_nolen(sv) \
1026 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1027 ? SvPVX(sv) : sv_2pv_nolen(sv))
1029 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1033 #define SvPVutf8(sv, lp) \
1034 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1035 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1037 #define SvPVutf8_force(sv, lp) \
1038 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1039 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1042 #define SvPVutf8_nolen(sv) \
1043 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1044 ? SvPVX(sv) : sv_2pvutf8_nolen(sv))
1048 #define SvPVbyte(sv, lp) \
1049 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1050 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1052 #define SvPVbyte_force(sv, lp) \
1053 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1054 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1056 #define SvPVbyte_nolen(sv) \
1057 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1058 ? SvPVX(sv) : sv_2pvbyte_nolen(sv))
1062 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
1063 * var to evaluate the arg once; failing that, use a global if possible;
1064 * failing that, call a function to do the work
1067 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1068 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1069 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1071 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1073 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1074 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1075 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1076 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1077 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1078 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1079 # define SvTRUE(sv) ( \
1083 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1085 (nxpv->xpv_cur > 1 || \
1086 (nxpv->xpv_cur && *nxpv->xpv_pv != '0')); }) \
1093 ? SvNVX(sv) != 0.0 \
1095 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1097 #else /* __GNUC__ */
1099 # ifdef USE_5005THREADS
1100 # define SvIVx(sv) sv_iv(sv)
1101 # define SvUVx(sv) sv_uv(sv)
1102 # define SvNVx(sv) sv_nv(sv)
1103 # define SvPVx(sv, lp) sv_pvn(sv, &lp)
1104 # define SvPVutf8x(sv, lp) sv_pvutf8n(sv, &lp)
1105 # define SvPVbytex(sv, lp) sv_pvbyten(sv, &lp)
1106 # define SvTRUE(sv) SvTRUEx(sv)
1107 # define SvTRUEx(sv) sv_true(sv)
1109 # else /* USE_5005THREADS */
1111 /* These inlined macros use globals, which will require a thread
1112 * declaration in user code, so we avoid them under threads */
1114 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1115 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1116 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1117 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1118 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1119 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1120 # define SvTRUE(sv) ( \
1124 ? ((PL_Xpv = (XPV*)SvANY(sv)) && \
1125 (PL_Xpv->xpv_cur > 1 || \
1126 (PL_Xpv->xpv_cur && *PL_Xpv->xpv_pv != '0')) \
1133 ? SvNVX(sv) != 0.0 \
1135 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1136 # endif /* USE_5005THREADS */
1137 #endif /* __GNU__ */
1139 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1140 (SVf_FAKE | SVf_READONLY))
1141 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1143 /* flag values for sv_*_flags functions */
1144 #define SV_IMMEDIATE_UNREF 1
1146 #define SV_COW_DROP_PV 4 /* Unused in Perl 5.8.x */
1147 #define SV_UTF8_NO_ENCODING 8
1148 #define SV_NOSTEAL 16
1150 /* all these 'functions' are now just macros */
1152 #define sv_pv(sv) SvPV_nolen(sv)
1153 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1154 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1156 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1157 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1158 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1159 #define sv_setsv(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_GMAGIC)
1160 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, 0)
1161 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1162 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1163 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1164 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1165 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1166 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1167 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1169 /* Should be named SvCatPVN_utf8_upgrade? */
1170 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1173 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1175 sv_setpvn(nsv, sstr, slen); \
1177 sv_utf8_upgrade(nsv); \
1178 sv_catsv(dsv, nsv); \
1182 =for apidoc Am|SV*|newRV_inc|SV* sv
1184 Creates an RV wrapper for an SV. The reference count for the original SV is
1190 #define newRV_inc(sv) newRV(sv)
1192 /* the following macros update any magic values this sv is associated with */
1195 =head1 Magical Functions
1197 =for apidoc Am|void|SvGETMAGIC|SV* sv
1198 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1199 argument more than once.
1201 =for apidoc Am|void|SvSETMAGIC|SV* sv
1202 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1203 argument more than once.
1205 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1206 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1209 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1210 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1211 ssv. May evaluate arguments more than once.
1213 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1214 Like C<SvSetSV>, but does any set magic required afterwards.
1216 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1217 Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1219 =for apidoc Am|void|SvSHARE|SV* sv
1220 Arranges for sv to be shared between threads if a suitable module
1223 =for apidoc Am|void|SvLOCK|SV* sv
1224 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1227 =for apidoc Am|void|SvUNLOCK|SV* sv
1228 Releases a mutual exclusion lock on sv if a suitable module
1231 =head1 SV Manipulation Functions
1233 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1234 Expands the character buffer in the SV so that it has room for the
1235 indicated number of bytes (remember to reserve space for an extra trailing
1236 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1237 Returns a pointer to the character buffer.
1242 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1243 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1244 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1246 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1247 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1249 #define SvSetSV_and(dst,src,finally) \
1251 if ((dst) != (src)) { \
1252 sv_setsv(dst, src); \
1256 #define SvSetSV_nosteal_and(dst,src,finally) \
1258 if ((dst) != (src)) { \
1259 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL); \
1264 #define SvSetSV(dst,src) \
1265 SvSetSV_and(dst,src,/*nothing*/;)
1266 #define SvSetSV_nosteal(dst,src) \
1267 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1269 #define SvSetMagicSV(dst,src) \
1270 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1271 #define SvSetMagicSV_nosteal(dst,src) \
1272 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1275 #if !defined(SKIP_DEBUGGING)
1276 #define SvPEEK(sv) sv_peek(sv)
1278 #define SvPEEK(sv) ""
1281 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1283 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1285 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1287 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1288 #define Sv_Grow sv_grow
1290 #define CLONEf_COPY_STACKS 1
1291 #define CLONEf_KEEP_PTR_TABLE 2
1292 #define CLONEf_CLONE_HOST 4
1293 #define CLONEf_JOIN_IN 8
1295 struct clone_params {
1298 PerlInterpreter *proto_perl;
1301 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) sv_force_normal(sv)