3 * Copyright (c) 1991-2000, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 #undef sv_flags /* Convex has this in <signal.h> for sigvec() */
15 =for apidoc AmU||svtype
16 An enum of flags for Perl types. These are found in the file B<sv.h>
17 in the C<svtype> enum. Test these flags with the C<SvTYPE> macro.
19 =for apidoc AmU||SVt_PV
20 Pointer type flag for scalars. See C<svtype>.
22 =for apidoc AmU||SVt_IV
23 Integer type flag for scalars. See C<svtype>.
25 =for apidoc AmU||SVt_NV
26 Double type flag for scalars. See C<svtype>.
28 =for apidoc AmU||SVt_PVMG
29 Type flag for blessed scalars. See C<svtype>.
31 =for apidoc AmU||SVt_PVAV
32 Type flag for arrays. See C<svtype>.
34 =for apidoc AmU||SVt_PVHV
35 Type flag for hashes. See C<svtype>.
37 =for apidoc AmU||SVt_PVCV
38 Type flag for code refs. See C<svtype>.
62 /* Using C's structural equivalence to help emulate C++ inheritance here... */
65 void* sv_any; /* pointer to something */
66 U32 sv_refcnt; /* how many references to us */
67 U32 sv_flags; /* what we are */
71 XPVGV* sv_any; /* pointer to something */
72 U32 sv_refcnt; /* how many references to us */
73 U32 sv_flags; /* what we are */
77 XPVCV* sv_any; /* pointer to something */
78 U32 sv_refcnt; /* how many references to us */
79 U32 sv_flags; /* what we are */
83 XPVAV* sv_any; /* pointer to something */
84 U32 sv_refcnt; /* how many references to us */
85 U32 sv_flags; /* what we are */
89 XPVHV* sv_any; /* pointer to something */
90 U32 sv_refcnt; /* how many references to us */
91 U32 sv_flags; /* what we are */
95 XPVIO* sv_any; /* pointer to something */
96 U32 sv_refcnt; /* how many references to us */
97 U32 sv_flags; /* what we are */
101 =for apidoc Am|U32|SvREFCNT|SV* sv
102 Returns the value of the object's reference count.
104 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv
105 Increments the reference count of the given SV.
107 =for apidoc Am|void|SvREFCNT_dec|SV* sv
108 Decrements the reference count of the given SV.
110 =for apidoc Am|svtype|SvTYPE|SV* sv
111 Returns the type of the SV. See C<svtype>.
113 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
114 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
115 perform the upgrade if necessary. See C<svtype>.
120 #define SvANY(sv) (sv)->sv_any
121 #define SvFLAGS(sv) (sv)->sv_flags
122 #define SvREFCNT(sv) (sv)->sv_refcnt
126 # ifdef EMULATE_ATOMIC_REFCOUNTS
127 # define ATOMIC_INC(count) STMT_START { \
128 MUTEX_LOCK(&PL_svref_mutex); \
130 MUTEX_UNLOCK(&PL_svref_mutex); \
132 # define ATOMIC_DEC_AND_TEST(res,count) STMT_START { \
133 MUTEX_LOCK(&PL_svref_mutex); \
134 res = (--count == 0); \
135 MUTEX_UNLOCK(&PL_svref_mutex); \
138 # define ATOMIC_INC(count) atomic_inc(&count)
139 # define ATOMIC_DEC_AND_TEST(res,count) (res = atomic_dec_and_test(&count))
140 # endif /* EMULATE_ATOMIC_REFCOUNTS */
142 # define ATOMIC_INC(count) (++count)
143 # define ATOMIC_DEC_AND_TEST(res, count) (res = (--count == 0))
144 #endif /* USE_THREADS */
147 # define SvREFCNT_inc(sv) \
149 SV *nsv = (SV*)(sv); \
151 ATOMIC_INC(SvREFCNT(nsv)); \
155 # if defined(CRIPPLED_CC) || defined(USE_THREADS)
156 # define SvREFCNT_inc(sv) sv_newref((SV*)sv)
158 # define SvREFCNT_inc(sv) \
159 ((PL_Sv=(SV*)(sv)), (PL_Sv && ATOMIC_INC(SvREFCNT(PL_Sv))), (SV*)PL_Sv)
163 #define SvREFCNT_dec(sv) sv_free((SV*)sv)
165 #define SVTYPEMASK 0xff
166 #define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK)
168 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= mt || sv_upgrade(sv, mt))
170 #define SVs_PADBUSY 0x00000100 /* reserved for tmp or my already */
171 #define SVs_PADTMP 0x00000200 /* in use as tmp */
172 #define SVs_PADMY 0x00000400 /* in use a "my" variable */
173 #define SVs_TEMP 0x00000800 /* string is stealable? */
174 #define SVs_OBJECT 0x00001000 /* is "blessed" */
175 #define SVs_GMG 0x00002000 /* has magical get method */
176 #define SVs_SMG 0x00004000 /* has magical set method */
177 #define SVs_RMG 0x00008000 /* has random magical methods */
179 #define SVf_IOK 0x00010000 /* has valid public integer value */
180 #define SVf_NOK 0x00020000 /* has valid public numeric value */
181 #define SVf_POK 0x00040000 /* has valid public pointer value */
182 #define SVf_ROK 0x00080000 /* has a valid reference pointer */
184 #define SVf_FAKE 0x00100000 /* glob or lexical is just a copy */
185 #define SVf_OOK 0x00200000 /* has valid offset value */
186 #define SVf_BREAK 0x00400000 /* refcnt is artificially low */
187 #define SVf_READONLY 0x00800000 /* may not be modified */
190 #define SVp_IOK 0x01000000 /* has valid non-public integer value */
191 #define SVp_NOK 0x02000000 /* has valid non-public numeric value */
192 #define SVp_POK 0x04000000 /* has valid non-public pointer value */
193 #define SVp_SCREAM 0x08000000 /* has been studied? */
195 #define SVf_UTF8 0x20000000 /* SvPVX is UTF-8 encoded */
197 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE|SVf_UTF8)
199 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
200 SVp_IOK|SVp_NOK|SVp_POK)
202 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
206 /* Some private flags. */
208 /* SVpad_OUR may be set on SVt_PV{NV,MG,GV} types */
209 #define SVpad_OUR 0x80000000 /* pad name is "our" instead of "my" */
211 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
213 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
215 #define SVpbm_VALID 0x80000000
216 #define SVpbm_TAIL 0x40000000
218 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
220 #define SVphv_SHAREKEYS 0x20000000 /* keys live on shared string table */
221 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
223 #define SVprv_WEAKREF 0x80000000 /* Weak reference */
226 SV * xrv_rv; /* pointer to another SV */
230 char * xpv_pv; /* pointer to malloced string */
231 STRLEN xpv_cur; /* length of xpv_pv as a C string */
232 STRLEN xpv_len; /* allocated size */
236 char * xpv_pv; /* pointer to malloced string */
237 STRLEN xpv_cur; /* length of xpv_pv as a C string */
238 STRLEN xpv_len; /* allocated size */
239 IV xiv_iv; /* integer value or pv offset */
243 char * xpv_pv; /* pointer to malloced string */
244 STRLEN xpv_cur; /* length of xpv_pv as a C string */
245 STRLEN xpv_len; /* allocated size */
246 UV xuv_uv; /* unsigned value or pv offset */
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 */
253 IV xiv_iv; /* integer value or pv offset */
254 NV xnv_nv; /* numeric value, if any */
257 /* These structure must match the beginning of struct xpvhv in hv.h. */
259 char * xpv_pv; /* pointer to malloced string */
260 STRLEN xpv_cur; /* length of xpv_pv as a C string */
261 STRLEN xpv_len; /* allocated size */
262 IV xiv_iv; /* integer value or pv offset */
263 NV xnv_nv; /* numeric value, if any */
264 MAGIC* xmg_magic; /* linked list of magicalness */
265 HV* xmg_stash; /* class package */
269 char * xpv_pv; /* pointer to malloced string */
270 STRLEN xpv_cur; /* length of xpv_pv as a C string */
271 STRLEN xpv_len; /* allocated size */
272 IV xiv_iv; /* integer value or pv offset */
273 NV xnv_nv; /* numeric value, if any */
274 MAGIC* xmg_magic; /* linked list of magicalness */
275 HV* xmg_stash; /* class package */
284 char * xpv_pv; /* pointer to malloced string */
285 STRLEN xpv_cur; /* length of xpv_pv as a C string */
286 STRLEN xpv_len; /* allocated size */
287 IV xiv_iv; /* integer value or pv offset */
288 NV xnv_nv; /* numeric value, if any */
289 MAGIC* xmg_magic; /* linked list of magicalness */
290 HV* xmg_stash; /* class package */
300 char * xpv_pv; /* pointer to malloced string */
301 STRLEN xpv_cur; /* length of xpv_pv as a C string */
302 STRLEN xpv_len; /* allocated size */
303 IV xiv_iv; /* integer value or pv offset */
304 NV xnv_nv; /* numeric value, if any */
305 MAGIC* xmg_magic; /* linked list of magicalness */
306 HV* xmg_stash; /* class package */
308 I32 xbm_useful; /* is this constant pattern being useful? */
309 U16 xbm_previous; /* how many characters in string before rare? */
310 U8 xbm_rare; /* rarest character in string */
313 /* This structure much match XPVCV in cv.h */
315 typedef U16 cv_flags_t;
318 char * xpv_pv; /* pointer to malloced string */
319 STRLEN xpv_cur; /* length of xpv_pv as a C string */
320 STRLEN xpv_len; /* allocated size */
321 IV xiv_iv; /* integer value or pv offset */
322 NV xnv_nv; /* numeric value, if any */
323 MAGIC* xmg_magic; /* linked list of magicalness */
324 HV* xmg_stash; /* class package */
329 void (*xcv_xsub)(pTHXo_ CV*);
333 long xcv_depth; /* >= 2 indicates recursive call */
337 perl_mutex *xcv_mutexp; /* protects xcv_owner */
338 struct perl_thread *xcv_owner; /* current owner thread */
339 #endif /* USE_THREADS */
340 cv_flags_t xcv_flags;
346 char * xpv_pv; /* pointer to malloced string */
347 STRLEN xpv_cur; /* length of xpv_pv as a C string */
348 STRLEN xpv_len; /* allocated size */
349 IV xiv_iv; /* integer value or pv offset */
350 NV xnv_nv; /* numeric value, if any */
351 MAGIC* xmg_magic; /* linked list of magicalness */
352 HV* xmg_stash; /* class package */
354 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
355 PerlIO * xio_ofp; /* but sockets need separate streams */
356 DIR * xio_dirp; /* for opendir, readdir, etc */
357 long xio_lines; /* $. */
358 long xio_page; /* $% */
359 long xio_page_len; /* $= */
360 long xio_lines_left; /* $- */
361 char * xio_top_name; /* $^ */
362 GV * xio_top_gv; /* $^ */
363 char * xio_fmt_name; /* $~ */
364 GV * xio_fmt_gv; /* $~ */
365 char * xio_bottom_name;/* $^B */
366 GV * xio_bottom_gv; /* $^B */
367 short xio_subprocess; /* -| or |- */
372 #define IOf_ARGV 1 /* this fp iterates over ARGV */
373 #define IOf_START 2 /* check for null ARGV and substitute '-' */
374 #define IOf_FLUSH 4 /* this fp wants a flush after write op */
375 #define IOf_DIDTOP 8 /* just did top of form */
376 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
377 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
378 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
380 /* The following macros define implementation-independent predicates on SVs. */
383 =for apidoc Am|bool|SvNIOK|SV* sv
384 Returns a boolean indicating whether the SV contains a number, integer or
387 =for apidoc Am|bool|SvNIOKp|SV* sv
388 Returns a boolean indicating whether the SV contains a number, integer or
389 double. Checks the B<private> setting. Use C<SvNIOK>.
391 =for apidoc Am|void|SvNIOK_off|SV* sv
392 Unsets the NV/IV status of an SV.
394 =for apidoc Am|bool|SvOK|SV* sv
395 Returns a boolean indicating whether the value is an SV.
397 =for apidoc Am|bool|SvIOKp|SV* sv
398 Returns a boolean indicating whether the SV contains an integer. Checks
399 the B<private> setting. Use C<SvIOK>.
401 =for apidoc Am|bool|SvNOKp|SV* sv
402 Returns a boolean indicating whether the SV contains a double. Checks the
403 B<private> setting. Use C<SvNOK>.
405 =for apidoc Am|bool|SvPOKp|SV* sv
406 Returns a boolean indicating whether the SV contains a character string.
407 Checks the B<private> setting. Use C<SvPOK>.
409 =for apidoc Am|bool|SvIOK|SV* sv
410 Returns a boolean indicating whether the SV contains an integer.
412 =for apidoc Am|void|SvIOK_on|SV* sv
413 Tells an SV that it is an integer.
415 =for apidoc Am|void|SvIOK_off|SV* sv
416 Unsets the IV status of an SV.
418 =for apidoc Am|void|SvIOK_only|SV* sv
419 Tells an SV that it is an integer and disables all other OK bits.
421 =for apidoc Am|bool|SvNOK|SV* sv
422 Returns a boolean indicating whether the SV contains a double.
424 =for apidoc Am|void|SvNOK_on|SV* sv
425 Tells an SV that it is a double.
427 =for apidoc Am|void|SvNOK_off|SV* sv
428 Unsets the NV status of an SV.
430 =for apidoc Am|void|SvNOK_only|SV* sv
431 Tells an SV that it is a double and disables all other OK bits.
433 =for apidoc Am|bool|SvPOK|SV* sv
434 Returns a boolean indicating whether the SV contains a character
437 =for apidoc Am|void|SvPOK_on|SV* sv
438 Tells an SV that it is a string.
440 =for apidoc Am|void|SvPOK_off|SV* sv
441 Unsets the PV status of an SV.
443 =for apidoc Am|void|SvPOK_only|SV* sv
444 Tells an SV that it is a string and disables all other OK bits.
446 =for apidoc Am|bool|SvOOK|SV* sv
447 Returns a boolean indicating whether the SvIVX is a valid offset value for
448 the SvPVX. This hack is used internally to speed up removal of characters
449 from the beginning of a SvPV. When SvOOK is true, then the start of the
450 allocated string buffer is really (SvPVX - SvIVX).
452 =for apidoc Am|bool|SvROK|SV* sv
453 Tests if the SV is an RV.
455 =for apidoc Am|void|SvROK_on|SV* sv
456 Tells an SV that it is an RV.
458 =for apidoc Am|void|SvROK_off|SV* sv
459 Unsets the RV status of an SV.
461 =for apidoc Am|SV*|SvRV|SV* sv
462 Dereferences an RV to return the SV.
464 =for apidoc Am|IV|SvIVX|SV* sv
465 Returns the integer which is stored in the SV, assuming SvIOK is
468 =for apidoc Am|UV|SvUVX|SV* sv
469 Returns the unsigned integer which is stored in the SV, assuming SvIOK is
472 =for apidoc Am|NV|SvNVX|SV* sv
473 Returns the double which is stored in the SV, assuming SvNOK is
476 =for apidoc Am|char*|SvPVX|SV* sv
477 Returns a pointer to the string in the SV. The SV must contain a
480 =for apidoc Am|STRLEN|SvCUR|SV* sv
481 Returns the length of the string which is in the SV. See C<SvLEN>.
483 =for apidoc Am|STRLEN|SvLEN|SV* sv
484 Returns the size of the string buffer in the SV. See C<SvCUR>.
486 =for apidoc Am|char*|SvEND|SV* sv
487 Returns a pointer to the last character in the string which is in the SV.
488 See C<SvCUR>. Access the character as *(SvEND(sv)).
490 =for apidoc Am|HV*|SvSTASH|SV* sv
491 Returns the stash of the SV.
493 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
494 Set the length of the string which is in the SV. See C<SvCUR>.
499 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
500 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
501 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
502 SVp_IOK|SVp_NOK|SVf_IVisUV))
504 #define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
505 #define SvOK_off(sv) (SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
506 SVf_IVisUV|SVf_UTF8), \
508 #define SvOK_off_exc_UV(sv) (SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
512 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
513 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
514 #define SvIOKp_on(sv) (SvOOK_off(sv), SvFLAGS(sv) |= SVp_IOK)
515 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
516 #define SvNOKp_on(sv) (SvFLAGS(sv) |= SVp_NOK)
517 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
518 #define SvPOKp_on(sv) (SvFLAGS(sv) |= SVp_POK)
520 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
521 #define SvIOK_on(sv) (SvOOK_off(sv), \
522 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
523 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
524 #define SvIOK_only(sv) (SvOK_off(sv), \
525 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
526 #define SvIOK_only_UV(sv) (SvOK_off_exc_UV(sv), \
527 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
529 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
530 == (SVf_IOK|SVf_IVisUV))
531 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
534 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
535 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
536 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
538 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
539 #define SvNOK_on(sv) (SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
540 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
541 #define SvNOK_only(sv) (SvOK_off(sv), \
542 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
544 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
545 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
546 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
548 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
549 #define SvPOK_on(sv) (SvFLAGS(sv) |= (SVf_POK|SVp_POK))
550 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
551 #define SvPOK_only(sv) (SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
552 SVf_IVisUV|SVf_UTF8), \
553 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
554 #define SvPOK_only_UTF8(sv) (SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
556 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
558 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
559 #define SvOOK_on(sv) (SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
560 #define SvOOK_off(sv) (SvOOK(sv) && sv_backoff(sv))
562 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
563 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
564 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
566 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
567 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
568 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVf_AMAGIC))
570 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
571 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
572 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
574 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
575 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
576 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
578 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
579 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
580 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
582 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
583 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
584 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
586 #define SvAMAGIC(sv) (SvFLAGS(sv) & SVf_AMAGIC)
587 #define SvAMAGIC_on(sv) (SvFLAGS(sv) |= SVf_AMAGIC)
588 #define SvAMAGIC_off(sv) (SvFLAGS(sv) &= ~SVf_AMAGIC)
591 #define Gv_AMG(stash) \
592 (HV_AMAGICmb(stash) && \
593 ((!HV_AMAGICbad(stash) && HV_AMAGIC(stash)) || Gv_AMupdate(stash)))
595 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
597 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
598 == (SVf_ROK|SVprv_WEAKREF))
599 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
600 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
602 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
604 #define SvPADBUSY(sv) (SvFLAGS(sv) & SVs_PADBUSY)
606 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
607 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP|SVs_PADBUSY)
608 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
610 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
611 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY|SVs_PADBUSY)
613 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
614 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
615 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
617 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
618 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
619 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
621 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
622 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
623 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
625 #define SvSCREAM(sv) (SvFLAGS(sv) & SVp_SCREAM)
626 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
627 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
629 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
630 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
631 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
633 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
634 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
635 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
637 #define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL)
638 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
639 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
641 #define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
642 #define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
643 #define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
645 #define SvRV(sv) ((XRV*) SvANY(sv))->xrv_rv
646 #define SvRVx(sv) SvRV(sv)
648 #define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
649 #define SvIVXx(sv) SvIVX(sv)
650 #define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
651 #define SvUVXx(sv) SvUVX(sv)
652 #define SvNVX(sv) ((XPVNV*)SvANY(sv))->xnv_nv
653 #define SvNVXx(sv) SvNVX(sv)
654 #define SvPVX(sv) ((XPV*) SvANY(sv))->xpv_pv
655 #define SvPVXx(sv) SvPVX(sv)
656 #define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
657 #define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
658 #define SvLENx(sv) SvLEN(sv)
659 #define SvEND(sv)(((XPV*) SvANY(sv))->xpv_pv + ((XPV*)SvANY(sv))->xpv_cur)
660 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
661 #define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
662 #define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
664 #define SvIV_set(sv, val) \
665 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
666 (((XPVIV*) SvANY(sv))->xiv_iv = val); } STMT_END
667 #define SvNV_set(sv, val) \
668 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
669 (((XPVNV*) SvANY(sv))->xnv_nv = val); } STMT_END
670 #define SvPV_set(sv, val) \
671 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
672 (((XPV*) SvANY(sv))->xpv_pv = val); } STMT_END
673 #define SvCUR_set(sv, val) \
674 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
675 (((XPV*) SvANY(sv))->xpv_cur = val); } STMT_END
676 #define SvLEN_set(sv, val) \
677 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
678 (((XPV*) SvANY(sv))->xpv_len = val); } STMT_END
679 #define SvEND_set(sv, val) \
680 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
681 (((XPV*) SvANY(sv))->xpv_cur = val - SvPVX(sv)); } STMT_END
683 #define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
684 #define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
685 #define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
687 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
689 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
690 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
691 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
692 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
694 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
695 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
696 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
697 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
698 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
699 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
700 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
701 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
702 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
703 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
704 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
705 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
706 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
707 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
708 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
709 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
712 =for apidoc Am|bool|SvTAINTED|SV* sv
713 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
716 =for apidoc Am|void|SvTAINTED_on|SV* sv
717 Marks an SV as tainted.
719 =for apidoc Am|void|SvTAINTED_off|SV* sv
720 Untaints an SV. Be I<very> careful with this routine, as it short-circuits
721 some of Perl's fundamental security features. XS module authors should not
722 use this function unless they fully understand all the implications of
723 unconditionally untainting the value. Untainting should be done in the
724 standard perl fashion, via a carefully crafted regexp, rather than directly
725 untainting variables.
727 =for apidoc Am|void|SvTAINT|SV* sv
728 Taints an SV if tainting is enabled
733 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
734 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
735 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
737 #define SvTAINT(sv) \
747 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
748 Like <SvPV> but will force the SV into becoming a string (SvPOK). You want
749 force if you are going to update the SvPVX directly.
751 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len
752 Returns a pointer to the string in the SV, or a stringified form of the SV
753 if the SV does not contain a string. Handles 'get' magic.
755 =for apidoc Am|char*|SvPV_nolen|SV* sv
756 Returns a pointer to the string in the SV, or a stringified form of the SV
757 if the SV does not contain a string. Handles 'get' magic.
759 =for apidoc Am|IV|SvIV|SV* sv
760 Coerces the given SV to an integer and returns it.
762 =for apidoc Am|NV|SvNV|SV* sv
763 Coerce the given SV to a double and return it.
765 =for apidoc Am|UV|SvUV|SV* sv
766 Coerces the given SV to an unsigned integer and returns it.
768 =for apidoc Am|bool|SvTRUE|SV* sv
769 Returns a boolean indicating whether Perl would evaluate the SV as true or
770 false, defined or undefined. Does not handle 'get' magic.
775 #define SvPV_force(sv, lp) sv_pvn_force(sv, &lp)
776 #define SvPV(sv, lp) sv_pvn(sv, &lp)
777 #define SvPV_nolen(sv) sv_pv(sv)
779 #define SvPVutf8_force(sv, lp) sv_pvutf8n_force(sv, &lp)
780 #define SvPVutf8(sv, lp) sv_pvutf8n(sv, &lp)
781 #define SvPVutf8_nolen(sv) sv_pvutf8(sv)
783 #define SvPVbyte_force(sv, lp) sv_pvbyte_force(sv, &lp)
784 #define SvPVbyte(sv, lp) sv_pvbyten(sv, &lp)
785 #define SvPVbyte_nolen(sv) sv_pvbyte(sv)
787 #define SvPVx(sv, lp) sv_pvn(sv, &lp)
788 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
789 #define SvPVutf8x(sv, lp) sv_pvutf8n(sv, &lp)
790 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
791 #define SvPVbytex(sv, lp) sv_pvbyten(sv, &lp)
792 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
794 #define SvIVx(sv) sv_iv(sv)
795 #define SvUVx(sv) sv_uv(sv)
796 #define SvNVx(sv) sv_nv(sv)
798 #define SvTRUEx(sv) sv_true(sv)
800 #define SvIV(sv) SvIVx(sv)
801 #define SvNV(sv) SvNVx(sv)
802 #define SvUV(sv) SvUVx(sv)
803 #define SvTRUE(sv) SvTRUEx(sv)
806 /* redefine some things to more efficient inlined versions */
808 /* Let us hope that bitmaps for UV and IV are the same */
810 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
813 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
816 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
819 #define SvPV(sv, lp) \
820 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
821 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv(sv, &lp))
825 #define SvPV_force(sv, lp) \
826 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
827 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force(sv, &lp))
830 #define SvPV_nolen(sv) \
831 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
832 ? SvPVX(sv) : sv_2pv_nolen(sv))
835 #define SvPVutf8(sv, lp) \
836 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
837 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
839 #undef SvPVutf8_force
840 #define SvPVutf8_force(sv, lp) \
841 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
842 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
844 #undef SvPVutf8_nolen
845 #define SvPVutf8_nolen(sv) \
846 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
847 ? SvPVX(sv) : sv_2pvutf8_nolen(sv))
850 #define SvPVutf8(sv, lp) \
851 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
852 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
854 #undef SvPVutf8_force
855 #define SvPVutf8_force(sv, lp) \
856 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
857 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
859 #undef SvPVutf8_nolen
860 #define SvPVutf8_nolen(sv) \
861 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
862 ? SvPVX(sv) : sv_2pvutf8_nolen(sv))
865 #define SvPVbyte(sv, lp) \
866 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
867 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
869 #undef SvPVbyte_force
870 #define SvPVbyte_force(sv, lp) \
871 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
872 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyte_force(sv, &lp))
874 #undef SvPVbyte_nolen
875 #define SvPVbyte_nolen(sv) \
876 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
877 ? SvPVX(sv) : sv_2pvbyte_nolen(sv))
889 # define SvIVx(sv) ({SV *nsv = (SV*)(sv); SvIV(nsv); })
890 # define SvUVx(sv) ({SV *nsv = (SV*)(sv); SvUV(nsv); })
891 # define SvNVx(sv) ({SV *nsv = (SV*)(sv); SvNV(nsv); })
892 # define SvPVx(sv, lp) ({SV *nsv = (sv); SvPV(nsv, lp); })
893 # define SvPVutf8x(sv, lp) ({SV *nsv = (sv); SvPVutf8(nsv, lp); })
894 # define SvPVbytex(sv, lp) ({SV *nsv = (sv); SvPVbyte(nsv, lp); })
895 # define SvTRUE(sv) ( \
899 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
901 (nxpv->xpv_cur > 1 || \
902 (nxpv->xpv_cur && *nxpv->xpv_pv != '0')); }) \
911 # define SvTRUEx(sv) ({SV *nsv = (sv); SvTRUE(nsv); })
914 /* These inlined macros use globals, which will require a thread
915 * declaration in user code, so we avoid them under threads */
925 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
926 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
927 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
928 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
929 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
930 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
931 # define SvTRUE(sv) ( \
935 ? ((PL_Xpv = (XPV*)SvANY(sv)) && \
936 (PL_Xpv->xpv_cur > 1 || \
937 (PL_Xpv->xpv_cur && *PL_Xpv->xpv_pv != '0')) \
946 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
947 #endif /* !USE_THREADS */
948 #endif /* !__GNU__ */
949 #endif /* !CRIPPLED_CC */
952 =for apidoc Am|SV*|newRV_inc|SV* sv
954 Creates an RV wrapper for an SV. The reference count for the original SV is
960 #define newRV_inc(sv) newRV(sv)
962 /* the following macros update any magic values this sv is associated with */
965 =for apidoc Am|void|SvGETMAGIC|SV* sv
966 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
967 argument more than once.
969 =for apidoc Am|void|SvSETMAGIC|SV* sv
970 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
971 argument more than once.
973 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
974 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
977 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
978 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
979 ssv. May evaluate arguments more than once.
981 =for apidoc Am|void|SvGROW|SV* sv|STRLEN len
982 Expands the character buffer in the SV so that it has room for the
983 indicated number of bytes (remember to reserve space for an extra trailing
984 NUL character). Calls C<sv_grow> to perform the expansion if necessary.
985 Returns a pointer to the character buffer.
990 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
991 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
993 #define SvSetSV_and(dst,src,finally) \
995 if ((dst) != (src)) { \
996 sv_setsv(dst, src); \
1000 #define SvSetSV_nosteal_and(dst,src,finally) \
1002 if ((dst) != (src)) { \
1003 U32 tMpF = SvFLAGS(src) & SVs_TEMP; \
1005 sv_setsv(dst, src); \
1006 SvFLAGS(src) |= tMpF; \
1011 #define SvSetSV(dst,src) \
1012 SvSetSV_and(dst,src,/*nothing*/;)
1013 #define SvSetSV_nosteal(dst,src) \
1014 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1016 #define SvSetMagicSV(dst,src) \
1017 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1018 #define SvSetMagicSV_nosteal(dst,src) \
1019 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1022 #define SvPEEK(sv) sv_peek(sv)
1024 #define SvPEEK(sv) ""
1027 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no)
1029 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1031 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1033 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1034 #define Sv_Grow sv_grow