source: vendor/perl/5.8.8/sv.h@ 3876

Last change on this file since 3876 was 3181, checked in by bird, 19 years ago

perl 5.8.8
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1/* sv.h
2 *
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006 by Larry Wall and others
5 *
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.
8 *
9 */
10
11#ifdef sv_flags
12#undef sv_flags /* Convex has this in <signal.h> for sigvec() */
13#endif
14
15/*
16=head1 SV Flags
17
18=for apidoc AmU||svtype
19An enum of flags for Perl types. These are found in the file B<sv.h>
20in the C<svtype> enum. Test these flags with the C<SvTYPE> macro.
21
22=for apidoc AmU||SVt_PV
23Pointer type flag for scalars. See C<svtype>.
24
25=for apidoc AmU||SVt_IV
26Integer type flag for scalars. See C<svtype>.
27
28=for apidoc AmU||SVt_NV
29Double type flag for scalars. See C<svtype>.
30
31=for apidoc AmU||SVt_PVMG
32Type flag for blessed scalars. See C<svtype>.
33
34=for apidoc AmU||SVt_PVAV
35Type flag for arrays. See C<svtype>.
36
37=for apidoc AmU||SVt_PVHV
38Type flag for hashes. See C<svtype>.
39
40=for apidoc AmU||SVt_PVCV
41Type flag for code refs. See C<svtype>.
42
43=cut
44*/
45
46typedef enum {
47 SVt_NULL, /* 0 */
48 SVt_IV, /* 1 */
49 SVt_NV, /* 2 */
50 SVt_RV, /* 3 */
51 SVt_PV, /* 4 */
52 SVt_PVIV, /* 5 */
53 SVt_PVNV, /* 6 */
54 SVt_PVMG, /* 7 */
55 SVt_PVBM, /* 8 */
56 SVt_PVLV, /* 9 */
57 SVt_PVAV, /* 10 */
58 SVt_PVHV, /* 11 */
59 SVt_PVCV, /* 12 */
60 SVt_PVGV, /* 13 */
61 SVt_PVFM, /* 14 */
62 SVt_PVIO /* 15 */
63} svtype;
64
65/* Using C's structural equivalence to help emulate C++ inheritance here... */
66
67struct 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 */
71};
72
73struct gv {
74 XPVGV* sv_any; /* pointer to something */
75 U32 sv_refcnt; /* how many references to us */
76 U32 sv_flags; /* what we are */
77};
78
79struct cv {
80 XPVCV* sv_any; /* pointer to something */
81 U32 sv_refcnt; /* how many references to us */
82 U32 sv_flags; /* what we are */
83};
84
85struct av {
86 XPVAV* sv_any; /* pointer to something */
87 U32 sv_refcnt; /* how many references to us */
88 U32 sv_flags; /* what we are */
89};
90
91struct hv {
92 XPVHV* sv_any; /* pointer to something */
93 U32 sv_refcnt; /* how many references to us */
94 U32 sv_flags; /* what we are */
95};
96
97struct io {
98 XPVIO* sv_any; /* pointer to something */
99 U32 sv_refcnt; /* how many references to us */
100 U32 sv_flags; /* what we are */
101};
102
103/*
104=head1 SV Manipulation Functions
105
106=for apidoc Am|U32|SvREFCNT|SV* sv
107Returns the value of the object's reference count.
108
109=for apidoc Am|SV*|SvREFCNT_inc|SV* sv
110Increments the reference count of the given SV.
111
112=for apidoc Am|void|SvREFCNT_dec|SV* sv
113Decrements the reference count of the given SV.
114
115=for apidoc Am|svtype|SvTYPE|SV* sv
116Returns the type of the SV. See C<svtype>.
117
118=for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
119Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
120perform the upgrade if necessary. See C<svtype>.
121
122=cut
123*/
124
125#define SvANY(sv) (sv)->sv_any
126#define SvFLAGS(sv) (sv)->sv_flags
127#define SvREFCNT(sv) (sv)->sv_refcnt
128
129#ifdef USE_5005THREADS
130
131# if defined(VMS)
132# define ATOMIC_INC(count) __ATOMIC_INCREMENT_LONG(&count)
133# define ATOMIC_DEC_AND_TEST(res,count) res=(1==__ATOMIC_DECREMENT_LONG(&count))
134 # else
135# ifdef EMULATE_ATOMIC_REFCOUNTS
136 # define ATOMIC_INC(count) STMT_START { \
137 MUTEX_LOCK(&PL_svref_mutex); \
138 ++count; \
139 MUTEX_UNLOCK(&PL_svref_mutex); \
140 } STMT_END
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); \
145 } STMT_END
146# else
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 */
150# endif /* VMS */
151#else
152# define ATOMIC_INC(count) (++count)
153# define ATOMIC_DEC_AND_TEST(res, count) (res = (--count == 0))
154#endif /* USE_5005THREADS */
155
156#if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
157# define SvREFCNT_inc(sv) \
158 ({ \
159 SV * const _sv = (SV*)(sv); \
160 if (_sv) \
161 ATOMIC_INC(SvREFCNT(_sv)); \
162 _sv; \
163 })
164#else
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)
169# else
170# define SvREFCNT_inc(sv) sv_newref((SV*)sv)
171# endif
172# else
173# define SvREFCNT_inc(sv) \
174 ((PL_Sv=(SV*)(sv)), (PL_Sv && ATOMIC_INC(SvREFCNT(PL_Sv))), (SV*)PL_Sv)
175# endif
176#endif
177
178#define SvREFCNT_dec(sv) sv_free((SV*)(sv))
179
180#define SVTYPEMASK 0xff
181#define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK)
182
183#define SvUPGRADE(sv, mt) (SvTYPE(sv) >= mt || sv_upgrade(sv, mt))
184
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 */
193
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 */
198
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 */
204
205
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? */
210
211#define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded */
212
213#define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
214
215#define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
216 SVp_IOK|SVp_NOK|SVp_POK)
217
218#define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
219
220#define PRIVSHIFT 8 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
221
222/* Some private flags. */
223
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 */
227
228#define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
229
230#define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
231
232#define SVpbm_VALID 0x80000000
233#define SVpbm_TAIL 0x40000000
234
235#define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
236
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 */
242
243#define SVprv_WEAKREF 0x80000000 /* Weak reference */
244
245struct xrv {
246 SV * xrv_rv; /* pointer to another SV */
247};
248
249struct xpv {
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};
254
255struct xpviv {
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};
261
262struct xpvuv {
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 */
267};
268
269struct xpvnv {
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 */
275};
276
277/* These structure must match the beginning of struct xpvhv in hv.h. */
278struct xpvmg {
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 */
286};
287
288struct xpvlv {
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 */
296
297 STRLEN xlv_targoff;
298 STRLEN xlv_targlen;
299 SV* xlv_targ;
300 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
301 * y=alem/helem/iter t=tie T=tied HE */
302};
303
304struct xpvgv {
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 */
312
313 GP* xgv_gp;
314 char* xgv_name;
315 STRLEN xgv_namelen;
316 HV* xgv_stash;
317 U8 xgv_flags;
318};
319
320struct xpvbm {
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 */
328
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 */
332};
333
334/* This structure must match XPVCV in cv.h */
335
336typedef U16 cv_flags_t;
337
338struct xpvfm {
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 */
346
347 HV * xcv_stash;
348 OP * xcv_start;
349 OP * xcv_root;
350 void (*xcv_xsub)(pTHX_ CV*);
351 ANY xcv_xsubany;
352 GV * xcv_gv;
353 char * xcv_file;
354 long xcv_depth; /* >= 2 indicates recursive call */
355 AV * xcv_padlist;
356 CV * xcv_outside;
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
364 * sub */
365 IV xfm_lines;
366};
367
368struct xpvio {
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 */
376
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.
387 */
388 union {
389 DIR * xiou_dirp; /* for opendir, readdir, etc */
390 void * xiou_any; /* for alignment */
391 } xio_dirpu;
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 |- */
403 char xio_type;
404 char xio_flags;
405};
406#define xio_dirp xio_dirpu.xiou_dirp
407#define xio_any xio_dirpu.xiou_any
408
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) */
416
417/* The following macros define implementation-independent predicates on SVs. */
418
419/*
420=for apidoc Am|bool|SvNIOK|SV* sv
421Returns a boolean indicating whether the SV contains a number, integer or
422double.
423
424=for apidoc Am|bool|SvNIOKp|SV* sv
425Returns a boolean indicating whether the SV contains a number, integer or
426double. Checks the B<private> setting. Use C<SvNIOK>.
427
428=for apidoc Am|void|SvNIOK_off|SV* sv
429Unsets the NV/IV status of an SV.
430
431=for apidoc Am|bool|SvOK|SV* sv
432Returns a boolean indicating whether the value is an SV. It also tells
433whether the value is defined or not.
434
435=for apidoc Am|bool|SvIOKp|SV* sv
436Returns a boolean indicating whether the SV contains an integer. Checks
437the B<private> setting. Use C<SvIOK>.
438
439=for apidoc Am|bool|SvNOKp|SV* sv
440Returns a boolean indicating whether the SV contains a double. Checks the
441B<private> setting. Use C<SvNOK>.
442
443=for apidoc Am|bool|SvPOKp|SV* sv
444Returns a boolean indicating whether the SV contains a character string.
445Checks the B<private> setting. Use C<SvPOK>.
446
447=for apidoc Am|bool|SvIOK|SV* sv
448Returns a boolean indicating whether the SV contains an integer.
449
450=for apidoc Am|void|SvIOK_on|SV* sv
451Tells an SV that it is an integer.
452
453=for apidoc Am|void|SvIOK_off|SV* sv
454Unsets the IV status of an SV.
455
456=for apidoc Am|void|SvIOK_only|SV* sv
457Tells an SV that it is an integer and disables all other OK bits.
458
459=for apidoc Am|void|SvIOK_only_UV|SV* sv
460Tells and SV that it is an unsigned integer and disables all other OK bits.
461
462=for apidoc Am|bool|SvIOK_UV|SV* sv
463Returns a boolean indicating whether the SV contains an unsigned integer.
464
465=for apidoc Am|void|SvUOK|SV* sv
466Returns a boolean indicating whether the SV contains an unsigned integer.
467
468=for apidoc Am|bool|SvIOK_notUV|SV* sv
469Returns a boolean indicating whether the SV contains a signed integer.
470
471=for apidoc Am|bool|SvNOK|SV* sv
472Returns a boolean indicating whether the SV contains a double.
473
474=for apidoc Am|void|SvNOK_on|SV* sv
475Tells an SV that it is a double.
476
477=for apidoc Am|void|SvNOK_off|SV* sv
478Unsets the NV status of an SV.
479
480=for apidoc Am|void|SvNOK_only|SV* sv
481Tells an SV that it is a double and disables all other OK bits.
482
483=for apidoc Am|bool|SvPOK|SV* sv
484Returns a boolean indicating whether the SV contains a character
485string.
486
487=for apidoc Am|void|SvPOK_on|SV* sv
488Tells an SV that it is a string.
489
490=for apidoc Am|void|SvPOK_off|SV* sv
491Unsets the PV status of an SV.
492
493=for apidoc Am|void|SvPOK_only|SV* sv
494Tells an SV that it is a string and disables all other OK bits.
495Will also turn off the UTF-8 status.
496
497=for apidoc Am|bool|SvOOK|SV* sv
498Returns a boolean indicating whether the SvIVX is a valid offset value for
499the SvPVX. This hack is used internally to speed up removal of characters
500from the beginning of a SvPV. When SvOOK is true, then the start of the
501allocated string buffer is really (SvPVX - SvIVX).
502
503=for apidoc Am|bool|SvROK|SV* sv
504Tests if the SV is an RV.
505
506=for apidoc Am|void|SvROK_on|SV* sv
507Tells an SV that it is an RV.
508
509=for apidoc Am|void|SvROK_off|SV* sv
510Unsets the RV status of an SV.
511
512=for apidoc Am|SV*|SvRV|SV* sv
513Dereferences an RV to return the SV.
514
515=for apidoc Am|IV|SvIVX|SV* sv
516Returns the raw value in the SV's IV slot, without checks or conversions.
517Only use when you are sure SvIOK is true. See also C<SvIV()>.
518
519=for apidoc Am|UV|SvUVX|SV* sv
520Returns the raw value in the SV's UV slot, without checks or conversions.
521Only use when you are sure SvIOK is true. See also C<SvUV()>.
522
523=for apidoc Am|NV|SvNVX|SV* sv
524Returns the raw value in the SV's NV slot, without checks or conversions.
525Only use when you are sure SvNOK is true. See also C<SvNV()>.
526
527=for apidoc Am|char*|SvPVX|SV* sv
528Returns a pointer to the physical string in the SV. The SV must contain a
529string.
530
531=for apidoc Am|STRLEN|SvCUR|SV* sv
532Returns the length of the string which is in the SV. See C<SvLEN>.
533
534=for apidoc Am|STRLEN|SvLEN|SV* sv
535Returns the size of the string buffer in the SV, not including any part
536attributable to C<SvOOK>. See C<SvCUR>.
537
538=for apidoc Am|char*|SvEND|SV* sv
539Returns a pointer to the last character in the string which is in the SV.
540See C<SvCUR>. Access the character as *(SvEND(sv)).
541
542=for apidoc Am|HV*|SvSTASH|SV* sv
543Returns the stash of the SV.
544
545=for apidoc Am|void|SvIV_set|SV* sv|IV val
546Set the value of the IV pointer in sv to val. It is possible to perform
547the same function of this macro with an lvalue assignment to C<SvIVX>.
548With future Perls, however, it will be more efficient to use
549C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
550
551=for apidoc Am|void|SvNV_set|SV* sv|NV val
552Set the value of the NV pointer in sv to val. See C<SvIV_set>.
553
554=for apidoc Am|void|SvPV_set|SV* sv|char* val
555Set the value of the PV pointer in sv to val. See C<SvIV_set>.
556
557=for apidoc Am|void|SvUV_set|SV* sv|UV val
558Set the value of the UV pointer in sv to val. See C<SvIV_set>.
559
560=for apidoc Am|void|SvRV_set|SV* sv|SV* val
561Set the value of the RV pointer in sv to val. See C<SvIV_set>.
562
563=for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
564Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>.
565
566=for apidoc Am|void|SvSTASH_set|SV* sv|STASH* val
567Set the value of the STASH pointer in sv to val. See C<SvIV_set>.
568
569=for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
570Set the current length of the string which is in the SV. See C<SvCUR>
571and C<SvIV_set>.
572
573=for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
574Set the actual length of the string which is in the SV. See C<SvIV_set>.
575
576=cut
577*/
578
579#define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
580#define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
581#define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
582 SVp_IOK|SVp_NOK|SVf_IVisUV))
583
584#if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
585#define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
586#else
587#define assert_not_ROK(sv)
588#endif
589
590#define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
591#define SvOK_off(sv) (assert_not_ROK(sv) \
592 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
593 SVf_IVisUV|SVf_UTF8), \
594 SvOOK_off(sv))
595#define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
596 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
597 SVf_UTF8), \
598 SvOOK_off(sv))
599
600#define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
601#define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
602#define SvIOKp_on(sv) ((void)SvOOK_off(sv), SvFLAGS(sv) |= SVp_IOK)
603#define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
604#define SvNOKp_on(sv) (SvFLAGS(sv) |= SVp_NOK)
605#define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
606#define SvPOKp_on(sv) (assert_not_ROK(sv) \
607 SvFLAGS(sv) |= SVp_POK)
608
609#define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
610#define SvIOK_on(sv) ((void)SvOOK_off(sv), \
611 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
612#define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
613#define SvIOK_only(sv) (SvOK_off(sv), \
614 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
615#define SvIOK_only_UV(sv) (SvOK_off_exc_UV(sv), \
616 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
617
618#define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
619 == (SVf_IOK|SVf_IVisUV))
620#define SvUOK(sv) SvIOK_UV(sv)
621#define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
622 == SVf_IOK)
623
624#define SvVOK(sv) (SvMAGICAL(sv) && mg_find(sv,'V'))
625#define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
626#define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
627#define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
628
629#define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
630#define SvNOK_on(sv) (SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
631#define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
632#define SvNOK_only(sv) (SvOK_off(sv), \
633 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
634
635/*
636=for apidoc Am|bool|SvUTF8|SV* sv
637Returns a boolean indicating whether the SV contains UTF-8 encoded data.
638
639=for apidoc Am|void|SvUTF8_on|SV *sv
640Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
641Do not use frivolously.
642
643=for apidoc Am|void|SvUTF8_off|SV *sv
644Unsets the UTF-8 status of an SV.
645
646=for apidoc Am|void|SvPOK_only_UTF8|SV* sv
647Tells an SV that it is a string and disables all other OK bits,
648and leaves the UTF-8 status as it was.
649
650=cut
651 */
652
653#define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
654#define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
655#define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
656
657#define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
658#define SvPOK_on(sv) (assert_not_ROK(sv) \
659 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
660#define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
661#define SvPOK_only(sv) (assert_not_ROK(sv) \
662 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
663 SVf_IVisUV|SVf_UTF8), \
664 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
665#define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) \
666 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
667 SVf_IVisUV), \
668 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
669
670#define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
671#define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
672#define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
673
674#define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
675#define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
676#define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
677
678#define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
679#define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
680#define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVf_AMAGIC))
681
682#define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
683#define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
684#define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
685
686#define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
687#define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
688#define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
689
690#define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
691#define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
692#define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
693
694#define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
695#define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
696#define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
697
698#define SvAMAGIC(sv) (SvFLAGS(sv) & SVf_AMAGIC)
699#define SvAMAGIC_on(sv) (SvFLAGS(sv) |= SVf_AMAGIC)
700#define SvAMAGIC_off(sv) (SvFLAGS(sv) &= ~SVf_AMAGIC)
701
702#define SvGAMAGIC(sv) (SvFLAGS(sv) & (SVs_GMG|SVf_AMAGIC))
703
704/*
705#define Gv_AMG(stash) \
706 (HV_AMAGICmb(stash) && \
707 ((!HV_AMAGICbad(stash) && HV_AMAGIC(stash)) || Gv_AMupdate(stash)))
708*/
709#define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
710
711#define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
712 == (SVf_ROK|SVprv_WEAKREF))
713#define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
714#define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
715
716#define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
717
718#define SvPADBUSY(sv) (SvFLAGS(sv) & SVs_PADBUSY)
719
720#define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
721#define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP|SVs_PADBUSY)
722#define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
723
724#define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
725#define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY|SVs_PADBUSY)
726
727#define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
728#define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
729#define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
730
731#define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
732#define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
733#define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
734
735#define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
736#define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
737#define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
738
739#define SvSCREAM(sv) (SvFLAGS(sv) & SVp_SCREAM)
740#define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
741#define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
742
743#define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
744#define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
745#define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
746
747#define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
748#define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
749#define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
750
751#define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL)
752#define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
753#define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
754
755#define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
756#define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
757#define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
758
759#ifdef USE_ITHREADS
760/* The following uses the FAKE flag to show that a regex pointer is infact
761 its own offset in the regexpad for ithreads */
762#define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
763#define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
764#define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
765#endif
766
767#define SvRV(sv) ((XRV*) SvANY(sv))->xrv_rv
768#define SvRVx(sv) SvRV(sv)
769
770#define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
771#define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
772#define SvNVX(sv) ((XPVNV*)SvANY(sv))->xnv_nv
773#define SvPVX(sv) ((XPV*) SvANY(sv))->xpv_pv
774/* Given that these two are new, there can't be any existing code using them
775 * as LVALUEs */
776#define SvPVX_mutable(sv) (0 + SvPVX(sv))
777#define SvPVX_const(sv) ((const char*) (0 + SvPVX(sv)))
778#define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
779#define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
780#define SvEND(sv)(((XPV*) SvANY(sv))->xpv_pv + ((XPV*)SvANY(sv))->xpv_cur)
781
782#define SvIVXx(sv) SvIVX(sv)
783#define SvUVXx(sv) SvUVX(sv)
784#define SvNVXx(sv) SvNVX(sv)
785#define SvPVXx(sv) SvPVX(sv)
786#define SvLENx(sv) SvLEN(sv)
787#define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
788#define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
789#define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
790
791/* Ask a scalar nicely to try to become an IV, if possible.
792 Not guaranteed to stay returning void */
793/* Macro won't actually call sv_2iv if already IOK */
794#define SvIV_please(sv) \
795 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
796 (void) SvIV(sv); } STMT_END
797/* Put the asserts back at some point and figure out where they reveal bugs
798*/
799#define SvIV_set(sv, val) \
800 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
801 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
802#define SvNV_set(sv, val) \
803 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
804 (((XPVNV*)SvANY(sv))->xnv_nv = (val)); } STMT_END
805/* assert(SvTYPE(sv) >= SVt_PV); */
806#define SvPV_set(sv, val) \
807 STMT_START { \
808 (((XPV*) SvANY(sv))->xpv_pv = (val)); } STMT_END
809/* assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); */
810#define SvUV_set(sv, val) \
811 STMT_START { \
812 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
813/* assert(SvTYPE(sv) >= SVt_RV); */
814#define SvRV_set(sv, val) \
815 STMT_START { \
816 (((XRV*)SvANY(sv))->xrv_rv = (val)); } STMT_END
817/* assert(SvTYPE(sv) >= SVt_PVMG); */
818#define SvMAGIC_set(sv, val) \
819 STMT_START { \
820 (((XPVMG*)SvANY(sv))->xmg_magic = (val)); } STMT_END
821/* assert(SvTYPE(sv) >= SVt_PVMG); */
822#define SvSTASH_set(sv, val) \
823 STMT_START { \
824 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
825/* assert(SvTYPE(sv) >= SVt_PV); */
826#define SvCUR_set(sv, val) \
827 STMT_START { \
828 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
829/* assert(SvTYPE(sv) >= SVt_PV); */
830#define SvLEN_set(sv, val) \
831 STMT_START { \
832 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
833#define SvEND_set(sv, val) \
834 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
835 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
836
837#define SvPV_renew(sv,n) \
838 STMT_START { SvLEN_set(sv, n); \
839 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
840 (char*)saferealloc((Malloc_t)SvPVX(sv), \
841 (MEM_SIZE)((n))))); \
842 } STMT_END
843
844#define SvPV_shrink_to_cur(sv) STMT_START { \
845 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
846 SvPV_renew(sv, _lEnGtH); \
847 } STMT_END
848
849#define SvPV_free(sv) \
850 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
851 if (SvLEN(sv)) { \
852 if(SvOOK(sv)) { \
853 Safefree(SvPVX(sv) - SvIVX(sv)); \
854 SvFLAGS(sv) &= ~SVf_OOK; \
855 } else { \
856 Safefree(SvPVX(sv)); \
857 } \
858 } \
859 } STMT_END
860
861#define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
862#define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
863#define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
864
865#define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
866
867#define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
868#define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
869#define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
870#define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
871
872#define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
873#define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
874#define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
875#define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
876#define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
877#define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
878#define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
879#define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
880#define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
881#define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
882#define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
883#define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
884#define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
885#define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
886#define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
887#define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
888#define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
889
890/* IoTYPE(sv) is a single character telling the type of I/O connection. */
891#define IoTYPE_RDONLY '<'
892#define IoTYPE_WRONLY '>'
893#define IoTYPE_RDWR '+'
894#define IoTYPE_APPEND 'a'
895#define IoTYPE_PIPE '|'
896#define IoTYPE_STD '-' /* stdin or stdout */
897#define IoTYPE_SOCKET 's'
898#define IoTYPE_CLOSED ' '
899#define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
900#define IoTYPE_NUMERIC '#' /* fdopen */
901
902/*
903=for apidoc Am|bool|SvTAINTED|SV* sv
904Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
905not.
906
907=for apidoc Am|void|SvTAINTED_on|SV* sv
908Marks an SV as tainted if tainting is enabled.
909
910=for apidoc Am|void|SvTAINTED_off|SV* sv
911Untaints an SV. Be I<very> careful with this routine, as it short-circuits
912some of Perl's fundamental security features. XS module authors should not
913use this function unless they fully understand all the implications of
914unconditionally untainting the value. Untainting should be done in the
915standard perl fashion, via a carefully crafted regexp, rather than directly
916untainting variables.
917
918=for apidoc Am|void|SvTAINT|SV* sv
919Taints an SV if tainting is enabled.
920
921=cut
922*/
923
924#define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
925#define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
926#define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
927
928#define SvTAINT(sv) \
929 STMT_START { \
930 if (PL_tainting) { \
931 if (PL_tainted) \
932 SvTAINTED_on(sv); \
933 } \
934 } STMT_END
935
936/*
937=for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
938Like C<SvPV> but will force the SV into containing just a string
939(C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
940directly.
941
942=for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
943Like C<SvPV> but will force the SV into containing just a string
944(C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
945directly. Doesn't process magic.
946
947=for apidoc Am|char*|SvPV|SV* sv|STRLEN len
948Returns a pointer to the string in the SV, or a stringified form of
949the SV if the SV does not contain a string. The SV may cache the
950stringified version becoming C<SvPOK>. Handles 'get' magic. See also
951C<SvPVx> for a version which guarantees to evaluate sv only once.
952
953=for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
954A version of C<SvPV> which guarantees to evaluate sv only once.
955
956=for apidoc Am|char*|SvPV_nolen|SV* sv
957Returns a pointer to the string in the SV, or a stringified form of
958the SV if the SV does not contain a string. The SV may cache the
959stringified form becoming C<SvPOK>. Handles 'get' magic.
960
961=for apidoc Am|IV|SvIV|SV* sv
962Coerces the given SV to an integer and returns it. See C<SvIVx> for a
963version which guarantees to evaluate sv only once.
964
965=for apidoc Am|IV|SvIVx|SV* sv
966Coerces the given SV to an integer and returns it. Guarantees to evaluate
967sv only once. Use the more efficient C<SvIV> otherwise.
968
969=for apidoc Am|NV|SvNV|SV* sv
970Coerce the given SV to a double and return it. See C<SvNVx> for a version
971which guarantees to evaluate sv only once.
972
973=for apidoc Am|NV|SvNVx|SV* sv
974Coerces the given SV to a double and returns it. Guarantees to evaluate
975sv only once. Use the more efficient C<SvNV> otherwise.
976
977=for apidoc Am|UV|SvUV|SV* sv
978Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
979for a version which guarantees to evaluate sv only once.
980
981=for apidoc Am|UV|SvUVx|SV* sv
982Coerces the given SV to an unsigned integer and returns it. Guarantees to
983evaluate sv only once. Use the more efficient C<SvUV> otherwise.
984
985=for apidoc Am|bool|SvTRUE|SV* sv
986Returns a boolean indicating whether Perl would evaluate the SV as true or
987false, defined or undefined. Does not handle 'get' magic.
988
989=for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
990Like C<SvPV_force>, but converts sv to utf8 first if necessary.
991
992=for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
993Like C<SvPV>, but converts sv to utf8 first if necessary.
994
995=for apidoc Am|char*|SvPVutf8_nolen|SV* sv
996Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
997
998=for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
999Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1000
1001=for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1002Like C<SvPV>, but converts sv to byte representation first if necessary.
1003
1004=for apidoc Am|char*|SvPVbyte_nolen|SV* sv
1005Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1006
1007=for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
1008Like C<SvPV_force>, but converts sv to utf8 first if necessary.
1009Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
1010otherwise.
1011
1012=for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
1013Like C<SvPV>, but converts sv to utf8 first if necessary.
1014Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
1015otherwise.
1016
1017=for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1018Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1019Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
1020otherwise.
1021
1022=for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1023Like C<SvPV>, but converts sv to byte representation first if necessary.
1024Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
1025otherwise.
1026
1027=for apidoc Am|bool|SvIsCOW|SV* sv
1028Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1029hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1030COW)
1031
1032=for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1033Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1034scalar.
1035
1036=for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1037Like C<sv_catpvn> but doesn't process magic.
1038
1039=for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1040Like C<sv_setsv> but doesn't process magic.
1041
1042=for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1043Like C<sv_catsv> but doesn't process magic.
1044
1045=cut
1046*/
1047
1048/* Let us hope that bitmaps for UV and IV are the same */
1049#define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
1050#define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
1051#define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
1052
1053/* ----*/
1054
1055#define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1056#define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
1057#define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
1058
1059#define SvPV_flags(sv, lp, flags) \
1060 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1061 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
1062#define SvPV_flags_const(sv, lp, flags) \
1063 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1064 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
1065 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN))
1066#define SvPV_flags_const_nolen(sv, flags) \
1067 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1068 ? SvPVX_const(sv) : \
1069 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN))
1070#define SvPV_flags_mutable(sv, lp, flags) \
1071 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1072 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
1073 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1074
1075#define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
1076#define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
1077#define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
1078
1079#define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1080#define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
1081
1082#define SvPV_force_flags(sv, lp, flags) \
1083 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1084 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1085#define SvPV_force_flags_nolen(sv, flags) \
1086 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1087 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1088#define SvPV_force_flags_mutable(sv, lp, flags) \
1089 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
1090 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
1091 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
1092
1093#define SvPV_nolen(sv) \
1094 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1095 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
1096
1097#define SvPV_nolen_const(sv) \
1098 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1099 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1100
1101#define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
1102#define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
1103#define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
1104
1105/* ----*/
1106
1107#define SvPVutf8(sv, lp) \
1108 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1109 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
1110
1111#define SvPVutf8_force(sv, lp) \
1112 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
1113 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1114
1115
1116#define SvPVutf8_nolen(sv) \
1117 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1118 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
1119
1120/* ----*/
1121
1122#define SvPVbyte(sv, lp) \
1123 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1124 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
1125
1126#define SvPVbyte_force(sv, lp) \
1127 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
1128 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
1129
1130#define SvPVbyte_nolen(sv) \
1131 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1132 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
1133
1134
1135
1136/* define FOOx(): idempotent versions of FOO(). If possible, use a local
1137 * var to evaluate the arg once; failing that, use a global if possible;
1138 * failing that, call a function to do the work
1139 */
1140
1141#define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1142#define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1143#define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1144
1145#if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1146
1147# define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1148# define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1149# define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1150# define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1151# define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
1152# define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
1153# define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
1154# define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1155# define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
1156# define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
1157# define SvTRUE(sv) ( \
1158 !sv \
1159 ? 0 \
1160 : SvPOK(sv) \
1161 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1162 nxpv && \
1163 (nxpv->xpv_cur > 1 || \
1164 (nxpv->xpv_cur && *nxpv->xpv_pv != '0')); }) \
1165 ? 1 \
1166 : 0) \
1167 : \
1168 SvIOK(sv) \
1169 ? SvIVX(sv) != 0 \
1170 : SvNOK(sv) \
1171 ? SvNVX(sv) != 0.0 \
1172 : sv_2bool(sv) )
1173# define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1174
1175#else /* __GNUC__ */
1176
1177# ifdef USE_5005THREADS
1178# define SvIVx(sv) sv_iv(sv)
1179# define SvUVx(sv) sv_uv(sv)
1180# define SvNVx(sv) sv_nv(sv)
1181# define SvPVx(sv, lp) sv_pvn(sv, &lp)
1182# define SvPVutf8x(sv, lp) sv_pvutf8n(sv, &lp)
1183# define SvPVbytex(sv, lp) sv_pvbyten(sv, &lp)
1184# define SvTRUE(sv) SvTRUEx(sv)
1185# define SvTRUEx(sv) sv_true(sv)
1186
1187# else /* USE_5005THREADS */
1188
1189/* These inlined macros use globals, which will require a thread
1190 * declaration in user code, so we avoid them under threads */
1191
1192# define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1193# define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1194# define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1195# define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1196# define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
1197# define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
1198# define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
1199# define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1200# define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1201# define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
1202# define SvTRUE(sv) ( \
1203 !sv \
1204 ? 0 \
1205 : SvPOK(sv) \
1206 ? ((PL_Xpv = (XPV*)SvANY(sv)) && \
1207 (PL_Xpv->xpv_cur > 1 || \
1208 (PL_Xpv->xpv_cur && *PL_Xpv->xpv_pv != '0')) \
1209 ? 1 \
1210 : 0) \
1211 : \
1212 SvIOK(sv) \
1213 ? SvIVX(sv) != 0 \
1214 : SvNOK(sv) \
1215 ? SvNVX(sv) != 0.0 \
1216 : sv_2bool(sv) )
1217# define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1218# endif /* USE_5005THREADS */
1219#endif /* __GNU__ */
1220
1221#define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1222 (SVf_FAKE | SVf_READONLY))
1223#define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
1224
1225#define SvSHARED_HASH(sv) (0 + SvUVX(sv))
1226
1227/* flag values for sv_*_flags functions */
1228#define SV_IMMEDIATE_UNREF 1
1229#define SV_GMAGIC 2
1230#define SV_COW_DROP_PV 4 /* Unused in Perl 5.8.x */
1231#define SV_UTF8_NO_ENCODING 8
1232#define SV_NOSTEAL 16
1233#define SV_CONST_RETURN 32
1234#define SV_MUTABLE_RETURN 64
1235
1236/* all these 'functions' are now just macros */
1237
1238#define sv_pv(sv) SvPV_nolen(sv)
1239#define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1240#define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1241
1242#define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1243#define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1244#define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1245#define sv_setsv(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_GMAGIC)
1246#define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, 0)
1247#define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1248#define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1249#define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1250#define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1251#define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1252#define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1253#define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
1254
1255/* Should be named SvCatPVN_utf8_upgrade? */
1256#define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1257 STMT_START { \
1258 if (!(nsv)) \
1259 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1260 else \
1261 sv_setpvn(nsv, sstr, slen); \
1262 SvUTF8_off(nsv); \
1263 sv_utf8_upgrade(nsv); \
1264 sv_catsv(dsv, nsv); \
1265 } STMT_END
1266
1267/*
1268=for apidoc Am|SV*|newRV_inc|SV* sv
1269
1270Creates an RV wrapper for an SV. The reference count for the original SV is
1271incremented.
1272
1273=cut
1274*/
1275
1276#define newRV_inc(sv) newRV(sv)
1277
1278/* the following macros update any magic values this sv is associated with */
1279
1280/*
1281=head1 Magical Functions
1282
1283=for apidoc Am|void|SvGETMAGIC|SV* sv
1284Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1285argument more than once.
1286
1287=for apidoc Am|void|SvSETMAGIC|SV* sv
1288Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1289argument more than once.
1290
1291=for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1292Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1293more than once.
1294
1295=for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1296Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1297ssv. May evaluate arguments more than once.
1298
1299=for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1300Like C<SvSetSV>, but does any set magic required afterwards.
1301
1302=for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
1303Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
1304
1305=for apidoc Am|void|SvSHARE|SV* sv
1306Arranges for sv to be shared between threads if a suitable module
1307has been loaded.
1308
1309=for apidoc Am|void|SvLOCK|SV* sv
1310Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1311has been loaded.
1312
1313=for apidoc Am|void|SvUNLOCK|SV* sv
1314Releases a mutual exclusion lock on sv if a suitable module
1315has been loaded.
1316
1317=head1 SV Manipulation Functions
1318
1319=for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
1320Expands the character buffer in the SV so that it has room for the
1321indicated number of bytes (remember to reserve space for an extra trailing
1322NUL character). Calls C<sv_grow> to perform the expansion if necessary.
1323Returns a pointer to the character buffer.
1324
1325=cut
1326*/
1327
1328#define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1329#define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1330#define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1331
1332#define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1333#define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
1334
1335#define SvSetSV_and(dst,src,finally) \
1336 STMT_START { \
1337 if ((dst) != (src)) { \
1338 sv_setsv(dst, src); \
1339 finally; \
1340 } \
1341 } STMT_END
1342#define SvSetSV_nosteal_and(dst,src,finally) \
1343 STMT_START { \
1344 if ((dst) != (src)) { \
1345 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL); \
1346 finally; \
1347 } \
1348 } STMT_END
1349
1350#define SvSetSV(dst,src) \
1351 SvSetSV_and(dst,src,/*nothing*/;)
1352#define SvSetSV_nosteal(dst,src) \
1353 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
1354
1355#define SvSetMagicSV(dst,src) \
1356 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1357#define SvSetMagicSV_nosteal(dst,src) \
1358 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1359
1360
1361#if !defined(SKIP_DEBUGGING)
1362#define SvPEEK(sv) sv_peek(sv)
1363#else
1364#define SvPEEK(sv) ""
1365#endif
1366
1367#define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
1368
1369#define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1370
1371#define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1372
1373#define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1374#define SvGROW_mutable(sv,len) \
1375 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
1376#define Sv_Grow sv_grow
1377
1378#define CLONEf_COPY_STACKS 1
1379#define CLONEf_KEEP_PTR_TABLE 2
1380#define CLONEf_CLONE_HOST 4
1381#define CLONEf_JOIN_IN 8
1382
1383struct clone_params {
1384 AV* stashes;
1385 UV flags;
1386 PerlInterpreter *proto_perl;
1387};
1388
1389#define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) sv_force_normal(sv)
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