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Revision 14545, 32.6 KB checked in by ghudson, 25 years ago (diff)
This commit was generated by cvs2svn to compensate for changes in r14544, which included commits to RCS files with non-trunk default branches.

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1	/* sv.h
2	*
3	* Copyright (c) 1991-2000, Larry Wall
4	*
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.
7	*
8	*/
9
10	#ifdef sv_flags
11	#undef sv_flags /* Convex has this in <signal.h> for sigvec() */
12	#endif
13
14	/*
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.
18
19	=for apidoc AmU\|\|SVt_PV
20	Pointer type flag for scalars. See C<svtype>.
21
22	=for apidoc AmU\|\|SVt_IV
23	Integer type flag for scalars. See C<svtype>.
24
25	=for apidoc AmU\|\|SVt_NV
26	Double type flag for scalars. See C<svtype>.
27
28	=for apidoc AmU\|\|SVt_PVMG
29	Type flag for blessed scalars. See C<svtype>.
30
31	=for apidoc AmU\|\|SVt_PVAV
32	Type flag for arrays. See C<svtype>.
33
34	=for apidoc AmU\|\|SVt_PVHV
35	Type flag for hashes. See C<svtype>.
36
37	=for apidoc AmU\|\|SVt_PVCV
38	Type flag for code refs. See C<svtype>.
39
40	=cut
41	*/
42
43	typedef enum {
44	SVt_NULL, /* 0 */
45	SVt_IV, /* 1 */
46	SVt_NV, /* 2 */
47	SVt_RV, /* 3 */
48	SVt_PV, /* 4 */
49	SVt_PVIV, /* 5 */
50	SVt_PVNV, /* 6 */
51	SVt_PVMG, /* 7 */
52	SVt_PVBM, /* 8 */
53	SVt_PVLV, /* 9 */
54	SVt_PVAV, /* 10 */
55	SVt_PVHV, /* 11 */
56	SVt_PVCV, /* 12 */
57	SVt_PVGV, /* 13 */
58	SVt_PVFM, /* 14 */
59	SVt_PVIO /* 15 */
60	} svtype;
61
62	/* Using C's structural equivalence to help emulate C++ inheritance here... */
63
64	struct sv {
65	void* sv_any; /* pointer to something */
66	U32 sv_refcnt; /* how many references to us */
67	U32 sv_flags; /* what we are */
68	};
69
70	struct gv {
71	XPVGV* sv_any; /* pointer to something */
72	U32 sv_refcnt; /* how many references to us */
73	U32 sv_flags; /* what we are */
74	};
75
76	struct cv {
77	XPVCV* sv_any; /* pointer to something */
78	U32 sv_refcnt; /* how many references to us */
79	U32 sv_flags; /* what we are */
80	};
81
82	struct av {
83	XPVAV* sv_any; /* pointer to something */
84	U32 sv_refcnt; /* how many references to us */
85	U32 sv_flags; /* what we are */
86	};
87
88	struct hv {
89	XPVHV* sv_any; /* pointer to something */
90	U32 sv_refcnt; /* how many references to us */
91	U32 sv_flags; /* what we are */
92	};
93
94	struct io {
95	XPVIO* sv_any; /* pointer to something */
96	U32 sv_refcnt; /* how many references to us */
97	U32 sv_flags; /* what we are */
98	};
99
100	/*
101	=for apidoc Am\|U32\|SvREFCNT\|SV* sv
102	Returns the value of the object's reference count.
103
104	=for apidoc Am\|SV\|SvREFCNT_inc\|SV sv
105	Increments the reference count of the given SV.
106
107	=for apidoc Am\|void\|SvREFCNT_dec\|SV* sv
108	Decrements the reference count of the given SV.
109
110	=for apidoc Am\|svtype\|SvTYPE\|SV* sv
111	Returns the type of the SV. See C<svtype>.
112
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>.
116
117	=cut
118	*/
119
120	#define SvANY(sv) (sv)->sv_any
121	#define SvFLAGS(sv) (sv)->sv_flags
122	#define SvREFCNT(sv) (sv)->sv_refcnt
123
124	#ifdef USE_THREADS
125
126	# ifdef EMULATE_ATOMIC_REFCOUNTS
127	# define ATOMIC_INC(count) STMT_START { \
128	MUTEX_LOCK(&PL_svref_mutex); \
129	++count; \
130	MUTEX_UNLOCK(&PL_svref_mutex); \
131	} STMT_END
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); \
136	} STMT_END
137	# else
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 */
141	#else
142	# define ATOMIC_INC(count) (++count)
143	# define ATOMIC_DEC_AND_TEST(res, count) (res = (--count == 0))
144	#endif /* USE_THREADS */
145
146	#ifdef __GNUC__
147	# define SvREFCNT_inc(sv) \
148	({ \
149	SV nsv = (SV)(sv); \
150	if (nsv) \
151	ATOMIC_INC(SvREFCNT(nsv)); \
152	nsv; \
153	})
154	#else
155	# if defined(CRIPPLED_CC) \|\| defined(USE_THREADS)
156	# define SvREFCNT_inc(sv) sv_newref((SV*)sv)
157	# else
158	# define SvREFCNT_inc(sv) \
159	((PL_Sv=(SV)(sv)), (PL_Sv && ATOMIC_INC(SvREFCNT(PL_Sv))), (SV)PL_Sv)
160	# endif
161	#endif
162
163	#define SvREFCNT_dec(sv) sv_free((SV*)sv)
164
165	#define SVTYPEMASK 0xff
166	#define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK)
167
168	#define SvUPGRADE(sv, mt) (SvTYPE(sv) >= mt \|\| sv_upgrade(sv, mt))
169
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 */
178
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 */
183
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 */
188
189
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? */
194
195	#define SVf_UTF8 0x20000000 /* SvPVX is UTF-8 encoded */
196
197	#define SVf_THINKFIRST (SVf_READONLY\|SVf_ROK\|SVf_FAKE\|SVf_UTF8)
198
199	#define SVf_OK (SVf_IOK\|SVf_NOK\|SVf_POK\|SVf_ROK\| \
200	SVp_IOK\|SVp_NOK\|SVp_POK)
201
202	#define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
203
204	#define PRIVSHIFT 8
205
206	/* Some private flags. */
207
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" */
210
211	#define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
212
213	#define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
214
215	#define SVpbm_VALID 0x80000000
216	#define SVpbm_TAIL 0x40000000
217
218	#define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
219
220	#define SVphv_SHAREKEYS 0x20000000 /* keys live on shared string table */
221	#define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
222
223	#define SVprv_WEAKREF 0x80000000 /* Weak reference */
224
225	struct xrv {
226	SV * xrv_rv; /* pointer to another SV */
227	};
228
229	struct xpv {
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 */
233	};
234
235	struct xpviv {
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 */
240	};
241
242	struct xpvuv {
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 */
247	};
248
249	struct xpvnv {
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 */
255	};
256
257	/* These structure must match the beginning of struct xpvhv in hv.h. */
258	struct xpvmg {
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 */
266	};
267
268	struct xpvlv {
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 */
276
277	STRLEN xlv_targoff;
278	STRLEN xlv_targlen;
279	SV* xlv_targ;
280	char xlv_type;
281	};
282
283	struct xpvgv {
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 */
291
292	GP* xgv_gp;
293	char* xgv_name;
294	STRLEN xgv_namelen;
295	HV* xgv_stash;
296	U8 xgv_flags;
297	};
298
299	struct xpvbm {
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 */
307
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 */
311	};
312
313	/* This structure much match XPVCV in cv.h */
314
315	typedef U16 cv_flags_t;
316
317	struct xpvfm {
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 */
325
326	HV * xcv_stash;
327	OP * xcv_start;
328	OP * xcv_root;
329	void (xcv_xsub)(pTHXo_ CV);
330	ANY xcv_xsubany;
331	GV * xcv_gv;
332	char * xcv_file;
333	long xcv_depth; /* >= 2 indicates recursive call */
334	AV * xcv_padlist;
335	CV * xcv_outside;
336	#ifdef USE_THREADS
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;
341
342	I32 xfm_lines;
343	};
344
345	struct xpvio {
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 */
353
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 \|- */
368	char xio_type;
369	char xio_flags;
370	};
371
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) */
379
380	/* The following macros define implementation-independent predicates on SVs. */
381
382	/*
383	=for apidoc Am\|bool\|SvNIOK\|SV* sv
384	Returns a boolean indicating whether the SV contains a number, integer or
385	double.
386
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>.
390
391	=for apidoc Am\|void\|SvNIOK_off\|SV* sv
392	Unsets the NV/IV status of an SV.
393
394	=for apidoc Am\|bool\|SvOK\|SV* sv
395	Returns a boolean indicating whether the value is an SV.
396
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>.
400
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>.
404
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>.
408
409	=for apidoc Am\|bool\|SvIOK\|SV* sv
410	Returns a boolean indicating whether the SV contains an integer.
411
412	=for apidoc Am\|void\|SvIOK_on\|SV* sv
413	Tells an SV that it is an integer.
414
415	=for apidoc Am\|void\|SvIOK_off\|SV* sv
416	Unsets the IV status of an SV.
417
418	=for apidoc Am\|void\|SvIOK_only\|SV* sv
419	Tells an SV that it is an integer and disables all other OK bits.
420
421	=for apidoc Am\|bool\|SvNOK\|SV* sv
422	Returns a boolean indicating whether the SV contains a double.
423
424	=for apidoc Am\|void\|SvNOK_on\|SV* sv
425	Tells an SV that it is a double.
426
427	=for apidoc Am\|void\|SvNOK_off\|SV* sv
428	Unsets the NV status of an SV.
429
430	=for apidoc Am\|void\|SvNOK_only\|SV* sv
431	Tells an SV that it is a double and disables all other OK bits.
432
433	=for apidoc Am\|bool\|SvPOK\|SV* sv
434	Returns a boolean indicating whether the SV contains a character
435	string.
436
437	=for apidoc Am\|void\|SvPOK_on\|SV* sv
438	Tells an SV that it is a string.
439
440	=for apidoc Am\|void\|SvPOK_off\|SV* sv
441	Unsets the PV status of an SV.
442
443	=for apidoc Am\|void\|SvPOK_only\|SV* sv
444	Tells an SV that it is a string and disables all other OK bits.
445
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).
451
452	=for apidoc Am\|bool\|SvROK\|SV* sv
453	Tests if the SV is an RV.
454
455	=for apidoc Am\|void\|SvROK_on\|SV* sv
456	Tells an SV that it is an RV.
457
458	=for apidoc Am\|void\|SvROK_off\|SV* sv
459	Unsets the RV status of an SV.
460
461	=for apidoc Am\|SV\|SvRV\|SV sv
462	Dereferences an RV to return the SV.
463
464	=for apidoc Am\|IV\|SvIVX\|SV* sv
465	Returns the integer which is stored in the SV, assuming SvIOK is
466	true.
467
468	=for apidoc Am\|UV\|SvUVX\|SV* sv
469	Returns the unsigned integer which is stored in the SV, assuming SvIOK is
470	true.
471
472	=for apidoc Am\|NV\|SvNVX\|SV* sv
473	Returns the double which is stored in the SV, assuming SvNOK is
474	true.
475
476	=for apidoc Am\|char\|SvPVX\|SV sv
477	Returns a pointer to the string in the SV. The SV must contain a
478	string.
479
480	=for apidoc Am\|STRLEN\|SvCUR\|SV* sv
481	Returns the length of the string which is in the SV. See C<SvLEN>.
482
483	=for apidoc Am\|STRLEN\|SvLEN\|SV* sv
484	Returns the size of the string buffer in the SV. See C<SvCUR>.
485
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)).
489
490	=for apidoc Am\|HV\|SvSTASH\|SV sv
491	Returns the stash of the SV.
492
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>.
495
496	=cut
497	*/
498
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))
503
504	#define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
505	#define SvOK_off(sv) (SvFLAGS(sv) &= ~(SVf_OK\|SVf_AMAGIC\| \
506	SVf_IVisUV\|SVf_UTF8), \
507	SvOOK_off(sv))
508	#define SvOK_off_exc_UV(sv) (SvFLAGS(sv) &= ~(SVf_OK\|SVf_AMAGIC\| \
509	SVf_UTF8), \
510	SvOOK_off(sv))
511
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) ((void)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)
519
520	#define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
521	#define SvIOK_on(sv) ((void)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) ((void)SvOK_off(sv), \
525	SvFLAGS(sv) \|= (SVf_IOK\|SVp_IOK))
526	#define SvIOK_only_UV(sv) ((void)SvOK_off_exc_UV(sv), \
527	SvFLAGS(sv) \|= (SVf_IOK\|SVp_IOK))
528
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)) \
532	== SVf_IOK)
533
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)
537
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) ((void)SvOK_off(sv), \
542	SvFLAGS(sv) \|= (SVf_NOK\|SVp_NOK))
543
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))
547
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\| \
555	SVf_IVisUV), \
556	SvFLAGS(sv) \|= (SVf_POK\|SVp_POK))
557
558	#define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
559	#define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) \|= SVf_OOK)
560	#define SvOOK_off(sv) (SvOOK(sv) && sv_backoff(sv))
561
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)
565
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))
569
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))
573
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)
577
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)
581
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)
585
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)
589
590	/*
591	#define Gv_AMG(stash) \
592	(HV_AMAGICmb(stash) && \
593	((!HV_AMAGICbad(stash) && HV_AMAGIC(stash)) \|\| Gv_AMupdate(stash)))
594	*/
595	#define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
596
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))
601
602	#define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
603
604	#define SvPADBUSY(sv) (SvFLAGS(sv) & SVs_PADBUSY)
605
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)
609
610	#define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
611	#define SvPADMY_on(sv) (SvFLAGS(sv) \|= SVs_PADMY\|SVs_PADBUSY)
612
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)
616
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)
620
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)
624
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)
628
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)
632
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)
636
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)
640
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)
644
645	#define SvRV(sv) ((XRV*) SvANY(sv))->xrv_rv
646	#define SvRVx(sv) SvRV(sv)
647
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
663
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
682
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
686
687	#define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
688
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
693
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
710
711	/*
712	=for apidoc Am\|bool\|SvTAINTED\|SV* sv
713	Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
714	not.
715
716	=for apidoc Am\|void\|SvTAINTED_on\|SV* sv
717	Marks an SV as tainted.
718
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.
726
727	=for apidoc Am\|void\|SvTAINT\|SV* sv
728	Taints an SV if tainting is enabled
729
730	=cut
731	*/
732
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
736
737	#define SvTAINT(sv) \
738	STMT_START { \
739	if (PL_tainting) { \
740	dTHR; \
741	if (PL_tainted) \
742	SvTAINTED_on(sv); \
743	} \
744	} STMT_END
745
746	/*
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.
750
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.
754
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.
758
759	=for apidoc Am\|IV\|SvIV\|SV* sv
760	Coerces the given SV to an integer and returns it.
761
762	=for apidoc Am\|NV\|SvNV\|SV* sv
763	Coerce the given SV to a double and return it.
764
765	=for apidoc Am\|UV\|SvUV\|SV* sv
766	Coerces the given SV to an unsigned integer and returns it.
767
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.
771
772	=cut
773	*/
774
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)
778
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)
782
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)
786
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)
793
794	#define SvIVx(sv) sv_iv(sv)
795	#define SvUVx(sv) sv_uv(sv)
796	#define SvNVx(sv) sv_nv(sv)
797
798	#define SvTRUEx(sv) sv_true(sv)
799
800	#define SvIV(sv) SvIVx(sv)
801	#define SvNV(sv) SvNVx(sv)
802	#define SvUV(sv) SvUVx(sv)
803	#define SvTRUE(sv) SvTRUEx(sv)
804
805	#ifndef CRIPPLED_CC
806	/* redefine some things to more efficient inlined versions */
807
808	/* Let us hope that bitmaps for UV and IV are the same */
809	#undef SvIV
810	#define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
811
812	#undef SvUV
813	#define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
814
815	#undef SvNV
816	#define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
817
818	#undef SvPV
819	#define SvPV(sv, lp) \
820	((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
821	? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv(sv, &lp))
822
823
824	#undef SvPV_force
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))
828
829	#undef SvPV_nolen
830	#define SvPV_nolen(sv) \
831	((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
832	? SvPVX(sv) : sv_2pv_nolen(sv))
833
834	#undef SvPVutf8
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))
838
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))
843
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))
848
849	#undef SvPVutf8
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))
853
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))
858
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))
863
864	#undef SvPVbyte
865	#define SvPVbyte(sv, lp) \
866	((SvFLAGS(sv) & (SVf_POK\|SVf_UTF8)) == (SVf_POK) \
867	? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
868
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))
873
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))
878
879
880	#ifdef __GNUC__
881	# undef SvIVx
882	# undef SvUVx
883	# undef SvNVx
884	# undef SvPVx
885	# undef SvPVutf8x
886	# undef SvPVbytex
887	# undef SvTRUE
888	# undef SvTRUEx
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) ( \
896	!sv \
897	? 0 \
898	: SvPOK(sv) \
899	? (({XPV nxpv = (XPV)SvANY(sv); \
900	nxpv && \
901	(nxpv->xpv_cur > 1 \|\| \
902	(nxpv->xpv_cur && *nxpv->xpv_pv != '0')); }) \
903	? 1 \
904	: 0) \
905	: \
906	SvIOK(sv) \
907	? SvIVX(sv) != 0 \
908	: SvNOK(sv) \
909	? SvNVX(sv) != 0.0 \
910	: sv_2bool(sv) )
911	# define SvTRUEx(sv) ({SV *nsv = (sv); SvTRUE(nsv); })
912	#else /* __GNUC__ */
913	#ifndef USE_THREADS
914	/* These inlined macros use globals, which will require a thread
915	* declaration in user code, so we avoid them under threads */
916
917	# undef SvIVx
918	# undef SvUVx
919	# undef SvNVx
920	# undef SvPVx
921	# undef SvPVutf8x
922	# undef SvPVbytex
923	# undef SvTRUE
924	# undef SvTRUEx
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) ( \
932	!sv \
933	? 0 \
934	: SvPOK(sv) \
935	? ((PL_Xpv = (XPV*)SvANY(sv)) && \
936	(PL_Xpv->xpv_cur > 1 \|\| \
937	(PL_Xpv->xpv_cur && *PL_Xpv->xpv_pv != '0')) \
938	? 1 \
939	: 0) \
940	: \
941	SvIOK(sv) \
942	? SvIVX(sv) != 0 \
943	: SvNOK(sv) \
944	? SvNVX(sv) != 0.0 \
945	: sv_2bool(sv) )
946	# define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
947	#endif /* !USE_THREADS */
948	#endif /* !__GNU__ */
949	#endif /* !CRIPPLED_CC */
950
951	/*
952	=for apidoc Am\|SV\|newRV_inc\|SV sv
953
954	Creates an RV wrapper for an SV. The reference count for the original SV is
955	incremented.
956
957	=cut
958	*/
959
960	#define newRV_inc(sv) newRV(sv)
961
962	/* the following macros update any magic values this sv is associated with */
963
964	/*
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.
968
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.
972
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
975	more than once.
976
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.
980
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.
986
987	=cut
988	*/
989
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
992
993	#define SvSetSV_and(dst,src,finally) \
994	STMT_START { \
995	if ((dst) != (src)) { \
996	sv_setsv(dst, src); \
997	finally; \
998	} \
999	} STMT_END
1000	#define SvSetSV_nosteal_and(dst,src,finally) \
1001	STMT_START { \
1002	if ((dst) != (src)) { \
1003	U32 tMpF = SvFLAGS(src) & SVs_TEMP; \
1004	SvTEMP_off(src); \
1005	sv_setsv(dst, src); \
1006	SvFLAGS(src) \|= tMpF; \
1007	finally; \
1008	} \
1009	} STMT_END
1010
1011	#define SvSetSV(dst,src) \
1012	SvSetSV_and(dst,src,/nothing/;)
1013	#define SvSetSV_nosteal(dst,src) \
1014	SvSetSV_nosteal_and(dst,src,/nothing/;)
1015
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))
1020
1021	#ifdef DEBUGGING
1022	#define SvPEEK(sv) sv_peek(sv)
1023	#else
1024	#define SvPEEK(sv) ""
1025	#endif
1026
1027	#define SvIMMORTAL(sv) ((sv)==&PL_sv_undef \|\| (sv)==&PL_sv_yes \|\| (sv)==&PL_sv_no)
1028
1029	#define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
1030
1031	#define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1032
1033	#define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1034	#define Sv_Grow sv_grow

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