3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 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 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
130 # define SvREFCNT_inc(sv) \
132 SV *nsv = (SV*)(sv); \
138 # define SvREFCNT_inc(sv) \
139 ((PL_Sv=(SV*)(sv)), (PL_Sv && ++(SvREFCNT(PL_Sv))), (SV*)PL_Sv)
142 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
143 # define SvREFCNT_dec(sv) \
145 SV *nsv = (SV*)(sv); \
147 if (SvREFCNT(nsv)) { \
148 if (--(SvREFCNT(nsv)) == 0) \
149 Perl_sv_free2(aTHX_ nsv); \
156 #define SvREFCNT_dec(sv) sv_free((SV*)(sv))
159 #define SVTYPEMASK 0xff
160 #define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK)
162 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= mt || sv_upgrade(sv, mt))
164 #define SVs_PADSTALE 0x00000100 /* lexical has gone out of scope */
165 #define SVs_PADTMP 0x00000200 /* in use as tmp */
166 #define SVs_PADMY 0x00000400 /* in use a "my" variable */
167 #define SVs_TEMP 0x00000800 /* string is stealable? */
168 #define SVs_OBJECT 0x00001000 /* is "blessed" */
169 #define SVs_GMG 0x00002000 /* has magical get method */
170 #define SVs_SMG 0x00004000 /* has magical set method */
171 #define SVs_RMG 0x00008000 /* has random magical methods */
173 #define SVf_IOK 0x00010000 /* has valid public integer value */
174 #define SVf_NOK 0x00020000 /* has valid public numeric value */
175 #define SVf_POK 0x00040000 /* has valid public pointer value */
176 #define SVf_ROK 0x00080000 /* has a valid reference pointer */
178 #define SVf_FAKE 0x00100000 /* glob or lexical is just a copy */
179 #define SVf_OOK 0x00200000 /* has valid offset value */
180 #define SVf_BREAK 0x00400000 /* refcnt is artificially low - used
181 * by SV's in final arena cleanup */
182 #define SVf_READONLY 0x00800000 /* may not be modified */
185 #define SVp_IOK 0x01000000 /* has valid non-public integer value */
186 #define SVp_NOK 0x02000000 /* has valid non-public numeric value */
187 #define SVp_POK 0x04000000 /* has valid non-public pointer value */
188 #define SVp_SCREAM 0x08000000 /* has been studied? */
190 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded */
192 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
194 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
195 SVp_IOK|SVp_NOK|SVp_POK)
197 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
199 #define PRIVSHIFT 8 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
201 /* Some private flags. */
203 /* SVpad_OUR may be set on SVt_PV{NV,MG,GV} types */
204 #define SVpad_OUR 0x80000000 /* pad name is "our" instead of "my" */
205 #define SVpad_TYPED 0x40000000 /* Typed Lexical */
207 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
209 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
211 #define SVpbm_VALID 0x80000000
212 #define SVpbm_TAIL 0x40000000
214 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
216 #define SVphv_SHAREKEYS 0x20000000 /* keys live on shared string table */
217 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
218 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
220 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
223 SV * xrv_rv; /* pointer to another SV */
227 char * xpv_pv; /* pointer to malloced string */
228 STRLEN xpv_cur; /* length of xpv_pv as a C string */
229 STRLEN xpv_len; /* allocated size */
233 char * xpv_pv; /* pointer to malloced string */
234 STRLEN xpv_cur; /* length of xpv_pv as a C string */
235 STRLEN xpv_len; /* allocated size */
236 IV xiv_iv; /* integer value or pv offset */
240 char * xpv_pv; /* pointer to malloced string */
241 STRLEN xpv_cur; /* length of xpv_pv as a C string */
242 STRLEN xpv_len; /* allocated size */
243 UV xuv_uv; /* unsigned value or pv offset */
247 char * xpv_pv; /* pointer to malloced string */
248 STRLEN xpv_cur; /* length of xpv_pv as a C string */
249 STRLEN xpv_len; /* allocated size */
250 IV xiv_iv; /* integer value or pv offset */
251 NV xnv_nv; /* numeric value, if any */
254 /* These structure must match the beginning of struct xpvhv in hv.h. */
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 */
260 NV xnv_nv; /* numeric value, if any */
261 MAGIC* xmg_magic; /* linked list of magicalness */
262 HV* xmg_stash; /* class package */
266 char * xpv_pv; /* pointer to malloced string */
267 STRLEN xpv_cur; /* length of xpv_pv as a C string */
268 STRLEN xpv_len; /* allocated size */
269 IV xiv_iv; /* integer value or pv offset */
270 NV xnv_nv; /* numeric value, if any */
271 MAGIC* xmg_magic; /* linked list of magicalness */
272 HV* xmg_stash; /* class package */
277 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
278 * y=alem/helem/iter t=tie T=tied HE */
282 char * xpv_pv; /* pointer to malloced string */
283 STRLEN xpv_cur; /* length of xpv_pv as a C string */
284 STRLEN xpv_len; /* allocated size */
285 IV xiv_iv; /* integer value or pv offset */
286 NV xnv_nv; /* numeric value, if any */
287 MAGIC* xmg_magic; /* linked list of magicalness */
288 HV* xmg_stash; /* class package */
298 char * xpv_pv; /* pointer to malloced string */
299 STRLEN xpv_cur; /* length of xpv_pv as a C string */
300 STRLEN xpv_len; /* allocated size */
301 IV xiv_iv; /* integer value or pv offset */
302 NV xnv_nv; /* numeric value, if any */
303 MAGIC* xmg_magic; /* linked list of magicalness */
304 HV* xmg_stash; /* class package */
306 I32 xbm_useful; /* is this constant pattern being useful? */
307 U16 xbm_previous; /* how many characters in string before rare? */
308 U8 xbm_rare; /* rarest character in string */
311 /* This structure must match XPVCV in cv.h */
313 typedef U16 cv_flags_t;
316 char * xpv_pv; /* pointer to malloced string */
317 STRLEN xpv_cur; /* length of xpv_pv as a C string */
318 STRLEN xpv_len; /* allocated size */
319 IV xiv_iv; /* integer value or pv offset */
320 NV xnv_nv; /* numeric value, if any */
321 MAGIC* xmg_magic; /* linked list of magicalness */
322 HV* xmg_stash; /* class package */
327 void (*xcv_xsub)(pTHX_ CV*);
331 long xcv_depth; /* >= 2 indicates recursive call */
334 cv_flags_t xcv_flags;
335 U32 xcv_outside_seq; /* the COP sequence (at the point of our
336 * compilation) in the lexically enclosing
342 char * xpv_pv; /* pointer to malloced string */
343 STRLEN xpv_cur; /* length of xpv_pv as a C string */
344 STRLEN xpv_len; /* allocated size */
345 IV xiv_iv; /* integer value or pv offset */
346 NV xnv_nv; /* numeric value, if any */
347 MAGIC* xmg_magic; /* linked list of magicalness */
348 HV* xmg_stash; /* class package */
350 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
351 PerlIO * xio_ofp; /* but sockets need separate streams */
352 /* Cray addresses everything by word boundaries (64 bits) and
353 * code and data pointers cannot be mixed (which is exactly what
354 * Perl_filter_add() tries to do with the dirp), hence the following
355 * union trick (as suggested by Gurusamy Sarathy).
356 * For further information see Geir Johansen's problem report titled
357 [ID 20000612.002] Perl problem on Cray system
358 * The any pointer (known as IoANY()) will also be a good place
359 * to hang any IO disciplines to.
362 DIR * xiou_dirp; /* for opendir, readdir, etc */
363 void * xiou_any; /* for alignment */
365 IV xio_lines; /* $. */
366 IV xio_page; /* $% */
367 IV xio_page_len; /* $= */
368 IV xio_lines_left; /* $- */
369 char * xio_top_name; /* $^ */
370 GV * xio_top_gv; /* $^ */
371 char * xio_fmt_name; /* $~ */
372 GV * xio_fmt_gv; /* $~ */
373 char * xio_bottom_name;/* $^B */
374 GV * xio_bottom_gv; /* $^B */
375 short xio_subprocess; /* -| or |- */
379 #define xio_dirp xio_dirpu.xiou_dirp
380 #define xio_any xio_dirpu.xiou_any
382 #define IOf_ARGV 1 /* this fp iterates over ARGV */
383 #define IOf_START 2 /* check for null ARGV and substitute '-' */
384 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
385 #define IOf_DIDTOP 8 /* just did top of form */
386 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
387 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
388 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
390 /* The following macros define implementation-independent predicates on SVs. */
393 =for apidoc Am|bool|SvNIOK|SV* sv
394 Returns a boolean indicating whether the SV contains a number, integer or
397 =for apidoc Am|bool|SvNIOKp|SV* sv
398 Returns a boolean indicating whether the SV contains a number, integer or
399 double. Checks the B<private> setting. Use C<SvNIOK>.
401 =for apidoc Am|void|SvNIOK_off|SV* sv
402 Unsets the NV/IV status of an SV.
404 =for apidoc Am|bool|SvOK|SV* sv
405 Returns a boolean indicating whether the value is an SV.
407 =for apidoc Am|bool|SvIOKp|SV* sv
408 Returns a boolean indicating whether the SV contains an integer. Checks
409 the B<private> setting. Use C<SvIOK>.
411 =for apidoc Am|bool|SvNOKp|SV* sv
412 Returns a boolean indicating whether the SV contains a double. Checks the
413 B<private> setting. Use C<SvNOK>.
415 =for apidoc Am|bool|SvPOKp|SV* sv
416 Returns a boolean indicating whether the SV contains a character string.
417 Checks the B<private> setting. Use C<SvPOK>.
419 =for apidoc Am|bool|SvIOK|SV* sv
420 Returns a boolean indicating whether the SV contains an integer.
422 =for apidoc Am|void|SvIOK_on|SV* sv
423 Tells an SV that it is an integer.
425 =for apidoc Am|void|SvIOK_off|SV* sv
426 Unsets the IV status of an SV.
428 =for apidoc Am|void|SvIOK_only|SV* sv
429 Tells an SV that it is an integer and disables all other OK bits.
431 =for apidoc Am|void|SvIOK_only_UV|SV* sv
432 Tells and SV that it is an unsigned integer and disables all other OK bits.
434 =for apidoc Am|void|SvIOK_UV|SV* sv
435 Returns a boolean indicating whether the SV contains an unsigned integer.
437 =for apidoc Am|void|SvUOK|SV* sv
438 Returns a boolean indicating whether the SV contains an unsigned integer.
440 =for apidoc Am|void|SvIOK_notUV|SV* sv
441 Returns a boolean indicating whether the SV contains a signed integer.
443 =for apidoc Am|bool|SvNOK|SV* sv
444 Returns a boolean indicating whether the SV contains a double.
446 =for apidoc Am|void|SvNOK_on|SV* sv
447 Tells an SV that it is a double.
449 =for apidoc Am|void|SvNOK_off|SV* sv
450 Unsets the NV status of an SV.
452 =for apidoc Am|void|SvNOK_only|SV* sv
453 Tells an SV that it is a double and disables all other OK bits.
455 =for apidoc Am|bool|SvPOK|SV* sv
456 Returns a boolean indicating whether the SV contains a character
459 =for apidoc Am|void|SvPOK_on|SV* sv
460 Tells an SV that it is a string.
462 =for apidoc Am|void|SvPOK_off|SV* sv
463 Unsets the PV status of an SV.
465 =for apidoc Am|void|SvPOK_only|SV* sv
466 Tells an SV that it is a string and disables all other OK bits.
467 Will also turn off the UTF8 status.
469 =for apidoc Am|bool|SvVOK|SV* sv
470 Returns a boolean indicating whether the SV contains a v-string.
472 =for apidoc Am|bool|SvOOK|SV* sv
473 Returns a boolean indicating whether the SvIVX is a valid offset value for
474 the SvPVX. This hack is used internally to speed up removal of characters
475 from the beginning of a SvPV. When SvOOK is true, then the start of the
476 allocated string buffer is really (SvPVX - SvIVX).
478 =for apidoc Am|bool|SvROK|SV* sv
479 Tests if the SV is an RV.
481 =for apidoc Am|void|SvROK_on|SV* sv
482 Tells an SV that it is an RV.
484 =for apidoc Am|void|SvROK_off|SV* sv
485 Unsets the RV status of an SV.
487 =for apidoc Am|SV*|SvRV|SV* sv
488 Dereferences an RV to return the SV.
490 =for apidoc Am|IV|SvIVX|SV* sv
491 Returns the raw value in the SV's IV slot, without checks or conversions.
492 Only use when you are sure SvIOK is true. See also C<SvIV()>.
494 =for apidoc Am|UV|SvUVX|SV* sv
495 Returns the raw value in the SV's UV slot, without checks or conversions.
496 Only use when you are sure SvIOK is true. See also C<SvUV()>.
498 =for apidoc Am|NV|SvNVX|SV* sv
499 Returns the raw value in the SV's NV slot, without checks or conversions.
500 Only use when you are sure SvNOK is true. See also C<SvNV()>.
502 =for apidoc Am|char*|SvPVX|SV* sv
503 Returns a pointer to the physical string in the SV. The SV must contain a
506 =for apidoc Am|STRLEN|SvCUR|SV* sv
507 Returns the length of the string which is in the SV. See C<SvLEN>.
509 =for apidoc Am|STRLEN|SvLEN|SV* sv
510 Returns the size of the string buffer in the SV, not including any part
511 attributable to C<SvOOK>. See C<SvCUR>.
513 =for apidoc Am|char*|SvEND|SV* sv
514 Returns a pointer to the last character in the string which is in the SV.
515 See C<SvCUR>. Access the character as *(SvEND(sv)).
517 =for apidoc Am|HV*|SvSTASH|SV* sv
518 Returns the stash of the SV.
520 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
521 Set the length of the string which is in the SV. See C<SvCUR>.
526 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
527 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
528 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
529 SVp_IOK|SVp_NOK|SVf_IVisUV))
531 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
532 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv))}),
534 #define assert_not_ROK(sv)
537 #define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
538 #define SvOK_off(sv) (assert_not_ROK(sv) \
539 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
540 SVf_IVisUV|SVf_UTF8), \
542 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
543 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
547 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
548 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
549 #define SvIOKp_on(sv) (SvRELEASE_IVX(sv), \
550 SvFLAGS(sv) |= SVp_IOK)
551 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
552 #define SvNOKp_on(sv) (SvFLAGS(sv) |= SVp_NOK)
553 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
554 #define SvPOKp_on(sv) (assert_not_ROK(sv) \
555 SvFLAGS(sv) |= SVp_POK)
557 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
558 #define SvIOK_on(sv) (SvRELEASE_IVX(sv), \
559 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
560 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
561 #define SvIOK_only(sv) ((void)SvOK_off(sv), \
562 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
563 #define SvIOK_only_UV(sv) ((void)SvOK_off_exc_UV(sv), \
564 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
566 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
567 == (SVf_IOK|SVf_IVisUV))
568 #define SvUOK(sv) SvIOK_UV(sv)
569 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
572 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
573 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
574 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
576 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
577 #define SvNOK_on(sv) (SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
578 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
579 #define SvNOK_only(sv) ((void)SvOK_off(sv), \
580 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
583 =for apidoc Am|void|SvUTF8|SV* sv
584 Returns a boolean indicating whether the SV contains UTF-8 encoded data.
586 =for apidoc Am|void|SvUTF8_on|SV *sv
587 Turn on the UTF8 status of an SV (the data is not changed, just the flag).
588 Do not use frivolously.
590 =for apidoc Am|void|SvUTF8_off|SV *sv
591 Unsets the UTF8 status of an SV.
593 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv
594 Tells an SV that it is a string and disables all other OK bits,
595 and leaves the UTF8 status as it was.
600 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
601 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
602 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
604 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
605 #define SvPOK_on(sv) (assert_not_ROK(sv) \
606 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
607 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
608 #define SvPOK_only(sv) (assert_not_ROK(sv) \
609 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
610 SVf_IVisUV|SVf_UTF8), \
611 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
612 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) \
613 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
615 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
617 #define SvVOK(sv) (SvMAGICAL(sv) && mg_find(sv,'V'))
618 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
619 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
620 #define SvOOK_off(sv) (SvOOK(sv) && sv_backoff(sv))
622 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
623 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
624 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
626 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
627 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
628 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVf_AMAGIC))
630 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
631 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
632 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
634 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
635 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
636 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
638 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
639 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
640 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
642 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
643 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
644 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
646 #define SvAMAGIC(sv) (SvFLAGS(sv) & SVf_AMAGIC)
647 #define SvAMAGIC_on(sv) (SvFLAGS(sv) |= SVf_AMAGIC)
648 #define SvAMAGIC_off(sv) (SvFLAGS(sv) &= ~SVf_AMAGIC)
650 #define SvGAMAGIC(sv) (SvFLAGS(sv) & (SVs_GMG|SVf_AMAGIC))
653 #define Gv_AMG(stash) \
654 (HV_AMAGICmb(stash) && \
655 ((!HV_AMAGICbad(stash) && HV_AMAGIC(stash)) || Gv_AMupdate(stash)))
657 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
659 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
660 == (SVf_ROK|SVprv_WEAKREF))
661 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
662 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
664 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
666 #define SvPADSTALE(sv) (SvFLAGS(sv) & SVs_PADSTALE)
667 #define SvPADSTALE_on(sv) (SvFLAGS(sv) |= SVs_PADSTALE)
668 #define SvPADSTALE_off(sv) (SvFLAGS(sv) &= ~SVs_PADSTALE)
670 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
671 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
672 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
674 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
675 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY)
677 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
678 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
679 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
681 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
682 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
683 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
685 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
686 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
687 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
689 #define SvSCREAM(sv) (SvFLAGS(sv) & SVp_SCREAM)
690 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
691 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
693 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
694 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
695 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
697 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
698 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
699 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
701 #define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL)
702 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
703 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
705 #define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
706 #define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
707 #define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
710 /* The following uses the FAKE flag to show that a regex pointer is infact
711 its own offset in the regexpad for ithreads */
712 #define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
713 #define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
714 #define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
717 #define SvRV(sv) ((XRV*) SvANY(sv))->xrv_rv
718 #define SvRVx(sv) SvRV(sv)
720 #define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
721 #define SvIVXx(sv) SvIVX(sv)
722 #define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
723 #define SvUVXx(sv) SvUVX(sv)
724 #define SvNVX(sv) ((XPVNV*)SvANY(sv))->xnv_nv
725 #define SvNVXx(sv) SvNVX(sv)
726 #define SvPVX(sv) ((XPV*) SvANY(sv))->xpv_pv
727 #define SvPVXx(sv) SvPVX(sv)
728 #define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
729 #define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
730 #define SvLENx(sv) SvLEN(sv)
731 #define SvEND(sv)(((XPV*) SvANY(sv))->xpv_pv + ((XPV*)SvANY(sv))->xpv_cur)
732 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
733 #define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
734 #define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
736 /* Ask a scalar nicely to try to become an IV, if possible.
737 Not guaranteed to stay returning void */
738 /* Macro won't actually call sv_2iv if already IOK */
739 #define SvIV_please(sv) \
740 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
741 (void) SvIV(sv); } STMT_END
742 #define SvIV_set(sv, val) \
743 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
744 (((XPVIV*) SvANY(sv))->xiv_iv = val); } STMT_END
745 #define SvNV_set(sv, val) \
746 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
747 (((XPVNV*) SvANY(sv))->xnv_nv = val); } STMT_END
748 #define SvPV_set(sv, val) \
749 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
750 (((XPV*) SvANY(sv))->xpv_pv = val); } STMT_END
751 #define SvCUR_set(sv, val) \
752 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
753 (((XPV*) SvANY(sv))->xpv_cur = val); } STMT_END
754 #define SvLEN_set(sv, val) \
755 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
756 (((XPV*) SvANY(sv))->xpv_len = val); } STMT_END
757 #define SvEND_set(sv, val) \
758 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
759 (((XPV*) SvANY(sv))->xpv_cur = val - SvPVX(sv)); } STMT_END
761 #define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
762 #define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
763 #define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
765 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
767 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
768 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
769 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
770 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
772 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
773 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
774 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
775 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
776 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
777 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
778 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
779 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
780 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
781 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
782 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
783 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
784 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
785 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
786 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
787 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
788 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
790 /* IoTYPE(sv) is a single character telling the type of I/O connection. */
791 #define IoTYPE_RDONLY '<'
792 #define IoTYPE_WRONLY '>'
793 #define IoTYPE_RDWR '+'
794 #define IoTYPE_APPEND 'a'
795 #define IoTYPE_PIPE '|'
796 #define IoTYPE_STD '-' /* stdin or stdout */
797 #define IoTYPE_SOCKET 's'
798 #define IoTYPE_CLOSED ' '
801 =for apidoc Am|bool|SvTAINTED|SV* sv
802 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
805 =for apidoc Am|void|SvTAINTED_on|SV* sv
806 Marks an SV as tainted.
808 =for apidoc Am|void|SvTAINTED_off|SV* sv
809 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
810 some of Perl's fundamental security features. XS module authors should not
811 use this function unless they fully understand all the implications of
812 unconditionally untainting the value. Untainting should be done in the
813 standard perl fashion, via a carefully crafted regexp, rather than directly
814 untainting variables.
816 =for apidoc Am|void|SvTAINT|SV* sv
817 Taints an SV if tainting is enabled
822 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
823 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
824 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
826 #define SvTAINT(sv) \
835 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
836 Like C<SvPV> but will force the SV into containing just a string
837 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
840 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
841 Like C<SvPV> but will force the SV into containing just a string
842 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
843 directly. Doesn't process magic.
845 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
846 Returns a pointer to the string in the SV, or a stringified form of
847 the SV if the SV does not contain a string. The SV may cache the
848 stringified version becoming C<SvPOK>. Handles 'get' magic. See also
849 C<SvPVx> for a version which guarantees to evaluate sv only once.
851 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
852 A version of C<SvPV> which guarantees to evaluate sv only once.
854 =for apidoc Am|char*|SvPV_nolen|SV* sv
855 Returns a pointer to the string in the SV, or a stringified form of
856 the SV if the SV does not contain a string. The SV may cache the
857 stringified form becoming C<SvPOK>. Handles 'get' magic.
859 =for apidoc Am|IV|SvIV|SV* sv
860 Coerces the given SV to an integer and returns it. See C<SvIVx> for a
861 version which guarantees to evaluate sv only once.
863 =for apidoc Am|IV|SvIVx|SV* sv
864 Coerces the given SV to an integer and returns it. Guarantees to evaluate
865 sv only once. Use the more efficient C<SvIV> otherwise.
867 =for apidoc Am|NV|SvNV|SV* sv
868 Coerce the given SV to a double and return it. See C<SvNVx> for a version
869 which guarantees to evaluate sv only once.
871 =for apidoc Am|NV|SvNVx|SV* sv
872 Coerces the given SV to a double and returns it. Guarantees to evaluate
873 sv only once. Use the more efficient C<SvNV> otherwise.
875 =for apidoc Am|UV|SvUV|SV* sv
876 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
877 for a version which guarantees to evaluate sv only once.
879 =for apidoc Am|UV|SvUVx|SV* sv
880 Coerces the given SV to an unsigned integer and returns it. Guarantees to
881 evaluate sv only once. Use the more efficient C<SvUV> otherwise.
883 =for apidoc Am|bool|SvTRUE|SV* sv
884 Returns a boolean indicating whether Perl would evaluate the SV as true or
885 false, defined or undefined. Does not handle 'get' magic.
887 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
888 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
890 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
891 Like C<SvPV>, but converts sv to utf8 first if necessary.
893 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv
894 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
896 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
897 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
899 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
900 Like C<SvPV>, but converts sv to byte representation first if necessary.
902 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv
903 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
905 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
906 Like C<SvPV_force>, but converts sv to utf8 first if necessary.
907 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
910 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
911 Like C<SvPV>, but converts sv to utf8 first if necessary.
912 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
915 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
916 Like C<SvPV_force>, but converts sv to byte representation first if necessary.
917 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
920 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
921 Like C<SvPV>, but converts sv to byte representation first if necessary.
922 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
925 =for apidoc Am|bool|SvIsCOW|SV* sv
926 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
927 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
930 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
931 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
937 /* Let us hope that bitmaps for UV and IV are the same */
938 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
939 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
940 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
944 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
946 #define SvPV_flags(sv, lp, flags) \
947 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
948 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
950 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
952 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
954 #define SvPV_force_flags(sv, lp, flags) \
955 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
956 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
958 #define SvPV_nolen(sv) \
959 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
960 ? SvPVX(sv) : sv_2pv_nolen(sv))
962 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
966 #define SvPVutf8(sv, lp) \
967 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
968 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
970 #define SvPVutf8_force(sv, lp) \
971 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
972 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
975 #define SvPVutf8_nolen(sv) \
976 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
977 ? SvPVX(sv) : sv_2pvutf8_nolen(sv))
981 #define SvPVbyte(sv, lp) \
982 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
983 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
985 #define SvPVbyte_force(sv, lp) \
986 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
987 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyte_force(sv, &lp))
989 #define SvPVbyte_nolen(sv) \
990 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
991 ? SvPVX(sv) : sv_2pvbyte_nolen(sv))
995 /* define FOOx(): idempotent versions of FOO(). If possible, use a local
996 * var to evaluate the arg once; failing that, use a global if possible;
997 * failing that, call a function to do the work
1000 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1001 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1002 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1004 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1006 # define SvIVx(sv) ({SV *nsv = (SV*)(sv); SvIV(nsv); })
1007 # define SvUVx(sv) ({SV *nsv = (SV*)(sv); SvUV(nsv); })
1008 # define SvNVx(sv) ({SV *nsv = (SV*)(sv); SvNV(nsv); })
1009 # define SvPVx(sv, lp) ({SV *nsv = (sv); SvPV(nsv, lp); })
1010 # define SvPVutf8x(sv, lp) ({SV *nsv = (sv); SvPVutf8(nsv, lp); })
1011 # define SvPVbytex(sv, lp) ({SV *nsv = (sv); SvPVbyte(nsv, lp); })
1012 # define SvTRUE(sv) ( \
1016 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1018 (nxpv->xpv_cur > 1 || \
1019 (nxpv->xpv_cur && *nxpv->xpv_pv != '0')); }) \
1026 ? SvNVX(sv) != 0.0 \
1028 # define SvTRUEx(sv) ({SV *nsv = (sv); SvTRUE(nsv); })
1030 #else /* __GNUC__ */
1032 /* These inlined macros use globals, which will require a thread
1033 * declaration in user code, so we avoid them under threads */
1035 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1036 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1037 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1038 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1039 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1040 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1041 # define SvTRUE(sv) ( \
1045 ? ((PL_Xpv = (XPV*)SvANY(sv)) && \
1046 (PL_Xpv->xpv_cur > 1 || \
1047 (PL_Xpv->xpv_cur && *PL_Xpv->xpv_pv != '0')) \
1054 ? SvNVX(sv) != 0.0 \
1056 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1057 #endif /* __GNU__ */
1059 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1060 (SVf_FAKE | SVf_READONLY))
1061 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1063 /* flag values for sv_*_flags functions */
1064 #define SV_IMMEDIATE_UNREF 1
1066 #define SV_COW_DROP_PV 4
1067 #define SV_UTF8_NO_ENCODING 8
1069 /* We are about to replace the SV's current value. So if it's copy on write
1070 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1071 the value is about to get thrown away, so drop the PV rather than go to
1072 the effort of making a read-write copy only for it to get immediately
1075 #define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1076 sv_force_normal_flags(sv, SV_COW_DROP_PV)
1078 #ifdef PERL_COPY_ON_WRITE
1079 # define SvRELEASE_IVX(sv) ((void)((SvFLAGS(sv) & (SVf_OOK|SVf_READONLY|SVf_FAKE)) \
1080 && Perl_sv_release_IVX(aTHX_ sv)))
1081 # define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
1083 #define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1084 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1085 SVf_OOK|SVf_BREAK|SVf_READONLY|SVf_AMAGIC)
1086 #define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1089 # define SvRELEASE_IVX(sv) ((void)SvOOK_off(sv))
1090 #endif /* PERL_COPY_ON_WRITE */
1092 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1093 sv_force_normal_flags(sv, 0)
1096 /* all these 'functions' are now just macros */
1098 #define sv_pv(sv) SvPV_nolen(sv)
1099 #define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1100 #define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1102 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1103 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1104 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1105 #define sv_setsv(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_GMAGIC)
1106 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, 0)
1107 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1108 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1109 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1110 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1111 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1112 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1113 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1115 /* Should be named SvCatPVN_utf8_upgrade? */
1116 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1119 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1121 sv_setpvn(nsv, sstr, slen); \
1123 sv_utf8_upgrade(nsv); \
1124 sv_catsv(dsv, nsv); \
1128 =for apidoc Am|SV*|newRV_inc|SV* sv
1130 Creates an RV wrapper for an SV. The reference count for the original SV is
1136 #define newRV_inc(sv) newRV(sv)
1138 /* the following macros update any magic values this sv is associated with */
1141 =head1 Magical Functions
1143 =for apidoc Am|void|SvGETMAGIC|SV* sv
1144 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1145 argument more than once.
1147 =for apidoc Am|void|SvSETMAGIC|SV* sv
1148 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1149 argument more than once.
1151 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1152 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1155 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1156 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1157 ssv. May evaluate arguments more than once.
1159 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1160 Like C<SvSetSV>, but does any set magic required afterwards.
1162 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1163 Like C<SvSetMagicSV>, but does any set magic required afterwards.
1165 =for apidoc Am|void|SvSHARE|SV* sv
1166 Arranges for sv to be shared between threads if a suitable module
1169 =for apidoc Am|void|SvLOCK|SV* sv
1170 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1173 =for apidoc Am|void|SvUNLOCK|SV* sv
1174 Releases a mutual exclusion lock on sv if a suitable module
1177 =head1 SV Manipulation Functions
1179 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1180 Expands the character buffer in the SV so that it has room for the
1181 indicated number of bytes (remember to reserve space for an extra trailing
1182 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1183 Returns a pointer to the character buffer.
1188 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1189 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1190 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1192 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1193 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1195 #define SvSetSV_and(dst,src,finally) \
1197 if ((dst) != (src)) { \
1198 sv_setsv(dst, src); \
1202 #define SvSetSV_nosteal_and(dst,src,finally) \
1204 if ((dst) != (src)) { \
1205 U32 tMpF = SvFLAGS(src) & SVs_TEMP; \
1207 sv_setsv(dst, src); \
1208 SvFLAGS(src) |= tMpF; \
1213 #define SvSetSV(dst,src) \
1214 SvSetSV_and(dst,src,/*nothing*/;)
1215 #define SvSetSV_nosteal(dst,src) \
1216 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1218 #define SvSetMagicSV(dst,src) \
1219 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1220 #define SvSetMagicSV_nosteal(dst,src) \
1221 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1224 #if !defined(SKIP_DEBUGGING)
1225 #define SvPEEK(sv) sv_peek(sv)
1227 #define SvPEEK(sv) ""
1230 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1232 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1234 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1236 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1237 #define Sv_Grow sv_grow
1239 #define CLONEf_COPY_STACKS 1
1240 #define CLONEf_KEEP_PTR_TABLE 2
1241 #define CLONEf_CLONE_HOST 4
1242 #define CLONEf_JOIN_IN 8
1244 struct clone_params {
1247 PerlInterpreter *proto_perl;