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a0d0e21e 1/* sv.h
79072805 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
1d325971 4 * 2000, 2001, 2002, 2003, 2004, 2005 by Larry Wall and others
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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 *
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9 */
10
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11#ifdef sv_flags
12#undef sv_flags /* Convex has this in <signal.h> for sigvec() */
13#endif
14
954c1994 15/*
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16=head1 SV Flags
17
954c1994 18=for apidoc AmU||svtype
8cf8f3d1 19An enum of flags for Perl types. These are found in the file B<sv.h>
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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
79072805 46typedef enum {
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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 */
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56 SVt_PVGV, /* 9 */
57 SVt_PVLV, /* 10 */
58 SVt_PVAV, /* 11 */
59 SVt_PVHV, /* 12 */
60 SVt_PVCV, /* 13 */
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61 SVt_PVFM, /* 14 */
62 SVt_PVIO /* 15 */
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63} svtype;
64
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65/* Using C's structural equivalence to help emulate C++ inheritance here... */
66
5e045b90 67struct STRUCT_SV { /* struct sv { */
463ee0b2 68 void* sv_any; /* pointer to something */
79072805 69 U32 sv_refcnt; /* how many references to us */
8990e307 70 U32 sv_flags; /* what we are */
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71#ifdef DEBUG_LEAKING_SCALARS
72 unsigned sv_debug_optype:9; /* the type of OP that allocated us */
73 unsigned sv_debug_inpad:1; /* was allocated in a pad for an OP */
74 unsigned sv_debug_cloned:1; /* was cloned for an ithread */
75 unsigned sv_debug_line:16; /* the line where we were allocated */
76 char * sv_debug_file; /* the file where we were allocated */
77#endif
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78};
79
80struct gv {
463ee0b2 81 XPVGV* sv_any; /* pointer to something */
79072805 82 U32 sv_refcnt; /* how many references to us */
8990e307 83 U32 sv_flags; /* what we are */
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84};
85
86struct cv {
232e078e 87 XPVCV* sv_any; /* pointer to something */
79072805 88 U32 sv_refcnt; /* how many references to us */
8990e307 89 U32 sv_flags; /* what we are */
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90};
91
92struct av {
463ee0b2 93 XPVAV* sv_any; /* pointer to something */
79072805 94 U32 sv_refcnt; /* how many references to us */
8990e307 95 U32 sv_flags; /* what we are */
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96};
97
98struct hv {
463ee0b2 99 XPVHV* sv_any; /* pointer to something */
79072805 100 U32 sv_refcnt; /* how many references to us */
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101 U32 sv_flags; /* what we are */
102};
103
104struct io {
105 XPVIO* sv_any; /* pointer to something */
106 U32 sv_refcnt; /* how many references to us */
107 U32 sv_flags; /* what we are */
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108};
109
954c1994 110/*
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111=head1 SV Manipulation Functions
112
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113=for apidoc Am|U32|SvREFCNT|SV* sv
114Returns the value of the object's reference count.
115
116=for apidoc Am|SV*|SvREFCNT_inc|SV* sv
117Increments the reference count of the given SV.
118
119=for apidoc Am|void|SvREFCNT_dec|SV* sv
120Decrements the reference count of the given SV.
121
122=for apidoc Am|svtype|SvTYPE|SV* sv
123Returns the type of the SV. See C<svtype>.
124
125=for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
126Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
127perform the upgrade if necessary. See C<svtype>.
128
129=cut
130*/
131
463ee0b2 132#define SvANY(sv) (sv)->sv_any
79072805 133#define SvFLAGS(sv) (sv)->sv_flags
aeea060c 134#define SvREFCNT(sv) (sv)->sv_refcnt
a863c7d1 135
93189314 136#if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
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137# define SvREFCNT_inc(sv) \
138 ({ \
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139 SV *_sv = (SV*)(sv); \
140 if (_sv) \
141 (SvREFCNT(_sv))++; \
142 _sv; \
dce16143 143 })
8990e307 144#else
3db8f154 145# define SvREFCNT_inc(sv) \
4db098f4 146 ((PL_Sv=(SV*)(sv)), (PL_Sv && ++(SvREFCNT(PL_Sv))), (SV*)PL_Sv)
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147#endif
148
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149#if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC)
150# define SvREFCNT_dec(sv) \
151 ({ \
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152 SV *_sv = (SV*)(sv); \
153 if (_sv) { \
154 if (SvREFCNT(_sv)) { \
155 if (--(SvREFCNT(_sv)) == 0) \
156 Perl_sv_free2(aTHX_ _sv); \
8c4d3c90 157 } else { \
3de3296f 158 sv_free(_sv); \
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159 } \
160 } \
161 })
162#else
91f3b821 163#define SvREFCNT_dec(sv) sv_free((SV*)(sv))
8c4d3c90 164#endif
a863c7d1 165
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166#define SVTYPEMASK 0xff
167#define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK)
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168
169#define SvUPGRADE(sv, mt) (SvTYPE(sv) >= mt || sv_upgrade(sv, mt))
170
d9d18af6 171#define SVs_PADSTALE 0x00000100 /* lexical has gone out of scope */
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172#define SVs_PADTMP 0x00000200 /* in use as tmp */
173#define SVs_PADMY 0x00000400 /* in use a "my" variable */
174#define SVs_TEMP 0x00000800 /* string is stealable? */
175#define SVs_OBJECT 0x00001000 /* is "blessed" */
176#define SVs_GMG 0x00002000 /* has magical get method */
177#define SVs_SMG 0x00004000 /* has magical set method */
178#define SVs_RMG 0x00008000 /* has random magical methods */
179
180#define SVf_IOK 0x00010000 /* has valid public integer value */
181#define SVf_NOK 0x00020000 /* has valid public numeric value */
182#define SVf_POK 0x00040000 /* has valid public pointer value */
183#define SVf_ROK 0x00080000 /* has a valid reference pointer */
a0d0e21e 184
748a9306 185#define SVf_FAKE 0x00100000 /* glob or lexical is just a copy */
8990e307 186#define SVf_OOK 0x00200000 /* has valid offset value */
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187#define SVf_BREAK 0x00400000 /* refcnt is artificially low - used
188 * by SV's in final arena cleanup */
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189#define SVf_READONLY 0x00800000 /* may not be modified */
190
a0d0e21e 191
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192#define SVp_IOK 0x01000000 /* has valid non-public integer value */
193#define SVp_NOK 0x02000000 /* has valid non-public numeric value */
194#define SVp_POK 0x04000000 /* has valid non-public pointer value */
195#define SVp_SCREAM 0x08000000 /* has been studied? */
196
446eaa42 197#define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded */
7a5fd60d 198/* Ensure this value does not clash with the GV_ADD* flags in gv.h */
5bc28da9 199
430eacda 200#define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE)
5bc28da9 201
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202#define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
203 SVp_IOK|SVp_NOK|SVp_POK)
204
9e7bc3e8 205#define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
a0d0e21e 206
7b2a0f84 207#define PRIVSHIFT 8 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
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208
209/* Some private flags. */
210
f472eb5c 211/* SVpad_OUR may be set on SVt_PV{NV,MG,GV} types */
032d6771 212#define SVpad_OUR 0x80000000 /* pad name is "our" instead of "my" */
524189f1 213#define SVpad_TYPED 0x40000000 /* Typed Lexical */
032d6771 214
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215#define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
216
217#define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */
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218
219#define SVpbm_VALID 0x80000000
bbce6d69 220#define SVpbm_TAIL 0x40000000
8990e307 221
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222#define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */
223
9660f481 224#define SVphv_CLONEABLE 0x08000000 /* for stashes: clone its objects */
4b5190b5 225#define SVphv_REHASH 0x10000000 /* HV is recalculating hash values */
6bfc225d 226#define SVphv_SHAREKEYS 0x20000000 /* keys live on shared string table */
51594c39 227#define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
19692e8d 228#define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
bf6bd887 229
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230#define SVprv_WEAKREF 0x80000000 /* Weak reference */
231
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232struct xrv {
233 SV * xrv_rv; /* pointer to another SV */
234};
235
79072805 236struct xpv {
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237 char * xpv_pv; /* pointer to malloced string */
238 STRLEN xpv_cur; /* length of xpv_pv as a C string */
239 STRLEN xpv_len; /* allocated size */
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240};
241
242struct xpviv {
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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 */
a0d0e21e 246 IV xiv_iv; /* integer value or pv offset */
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247};
248
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249struct xpvuv {
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 UV xuv_uv; /* unsigned value or pv offset */
254};
255
79072805 256struct xpvnv {
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257 char * xpv_pv; /* pointer to malloced string */
258 STRLEN xpv_cur; /* length of xpv_pv as a C string */
259 STRLEN xpv_len; /* allocated size */
a0d0e21e 260 IV xiv_iv; /* integer value or pv offset */
65202027 261 NV xnv_nv; /* numeric value, if any */
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262};
263
6ee623d5 264/* These structure must match the beginning of struct xpvhv in hv.h. */
79072805 265struct xpvmg {
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266 char * xpv_pv; /* pointer to malloced string */
267 STRLEN xpv_cur; /* length of xpv_pv as a C string */
268 STRLEN xpv_len; /* allocated size */
a0d0e21e 269 IV xiv_iv; /* integer value or pv offset */
65202027 270 NV xnv_nv; /* numeric value, if any */
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271 MAGIC* xmg_magic; /* linked list of magicalness */
272 HV* xmg_stash; /* class package */
273};
274
275struct xpvlv {
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276 char * xpv_pv; /* pointer to malloced string */
277 STRLEN xpv_cur; /* length of xpv_pv as a C string */
278 STRLEN xpv_len; /* allocated size */
a0d0e21e 279 IV xiv_iv; /* integer value or pv offset */
65202027 280 NV xnv_nv; /* numeric value, if any */
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281 MAGIC* xmg_magic; /* linked list of magicalness */
282 HV* xmg_stash; /* class package */
8990e307 283
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284 /* a full glob fits into this */
285 GP* xgv_gp;
286 char* xgv_name;
287 STRLEN xgv_namelen;
288 HV* xgv_stash;
289 U8 xgv_flags;
290
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291 STRLEN xlv_targoff;
292 STRLEN xlv_targlen;
293 SV* xlv_targ;
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294 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
295 * y=alem/helem/iter t=tie T=tied HE */
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296};
297
298struct xpvgv {
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299 char * xpv_pv; /* pointer to malloced string */
300 STRLEN xpv_cur; /* length of xpv_pv as a C string */
301 STRLEN xpv_len; /* allocated size */
a0d0e21e 302 IV xiv_iv; /* integer value or pv offset */
65202027 303 NV xnv_nv; /* numeric value, if any */
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304 MAGIC* xmg_magic; /* linked list of magicalness */
305 HV* xmg_stash; /* class package */
8990e307 306
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307 GP* xgv_gp;
308 char* xgv_name;
309 STRLEN xgv_namelen;
310 HV* xgv_stash;
a5f75d66 311 U8 xgv_flags;
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312};
313
314struct xpvbm {
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315 char * xpv_pv; /* pointer to malloced string */
316 STRLEN xpv_cur; /* length of xpv_pv as a C string */
317 STRLEN xpv_len; /* allocated size */
a0d0e21e 318 IV xiv_iv; /* integer value or pv offset */
65202027 319 NV xnv_nv; /* numeric value, if any */
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320 MAGIC* xmg_magic; /* linked list of magicalness */
321 HV* xmg_stash; /* class package */
8990e307 322
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323 I32 xbm_useful; /* is this constant pattern being useful? */
324 U16 xbm_previous; /* how many characters in string before rare? */
325 U8 xbm_rare; /* rarest character in string */
326};
327
fd40b977 328/* This structure must match XPVCV in cv.h */
44a8e56a 329
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330typedef U16 cv_flags_t;
331
79072805 332struct xpvfm {
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333 char * xpv_pv; /* pointer to malloced string */
334 STRLEN xpv_cur; /* length of xpv_pv as a C string */
335 STRLEN xpv_len; /* allocated size */
a0d0e21e 336 IV xiv_iv; /* integer value or pv offset */
65202027 337 NV xnv_nv; /* numeric value, if any */
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338 MAGIC* xmg_magic; /* linked list of magicalness */
339 HV* xmg_stash; /* class package */
8990e307 340
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341 HV * xcv_stash;
342 OP * xcv_start;
343 OP * xcv_root;
acfe0abc 344 void (*xcv_xsub)(pTHX_ CV*);
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345 ANY xcv_xsubany;
346 GV * xcv_gv;
57843af0 347 char * xcv_file;
b195d487 348 long xcv_depth; /* >= 2 indicates recursive call */
79072805 349 AV * xcv_padlist;
748a9306 350 CV * xcv_outside;
77a005ab 351 cv_flags_t xcv_flags;
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352 U32 xcv_outside_seq; /* the COP sequence (at the point of our
353 * compilation) in the lexically enclosing
354 * sub */
11a7ac70 355 IV xfm_lines;
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356};
357
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358struct xpvio {
359 char * xpv_pv; /* pointer to malloced string */
360 STRLEN xpv_cur; /* length of xpv_pv as a C string */
361 STRLEN xpv_len; /* allocated size */
a0d0e21e 362 IV xiv_iv; /* integer value or pv offset */
65202027 363 NV xnv_nv; /* numeric value, if any */
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364 MAGIC* xmg_magic; /* linked list of magicalness */
365 HV* xmg_stash; /* class package */
366
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367 PerlIO * xio_ifp; /* ifp and ofp are normally the same */
368 PerlIO * xio_ofp; /* but sockets need separate streams */
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369 /* Cray addresses everything by word boundaries (64 bits) and
370 * code and data pointers cannot be mixed (which is exactly what
371 * Perl_filter_add() tries to do with the dirp), hence the following
372 * union trick (as suggested by Gurusamy Sarathy).
373 * For further information see Geir Johansen's problem report titled
374 [ID 20000612.002] Perl problem on Cray system
375 * The any pointer (known as IoANY()) will also be a good place
376 * to hang any IO disciplines to.
377 */
378 union {
379 DIR * xiou_dirp; /* for opendir, readdir, etc */
380 void * xiou_any; /* for alignment */
381 } xio_dirpu;
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382 IV xio_lines; /* $. */
383 IV xio_page; /* $% */
384 IV xio_page_len; /* $= */
385 IV xio_lines_left; /* $- */
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386 char * xio_top_name; /* $^ */
387 GV * xio_top_gv; /* $^ */
388 char * xio_fmt_name; /* $~ */
389 GV * xio_fmt_gv; /* $~ */
390 char * xio_bottom_name;/* $^B */
391 GV * xio_bottom_gv; /* $^B */
392 short xio_subprocess; /* -| or |- */
393 char xio_type;
394 char xio_flags;
395};
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396#define xio_dirp xio_dirpu.xiou_dirp
397#define xio_any xio_dirpu.xiou_any
8990e307 398
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399#define IOf_ARGV 1 /* this fp iterates over ARGV */
400#define IOf_START 2 /* check for null ARGV and substitute '-' */
401#define IOf_FLUSH 4 /* this fp wants a flush after write op */
402#define IOf_DIDTOP 8 /* just did top of form */
403#define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
404#define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
405#define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */
8990e307 406
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407/* The following macros define implementation-independent predicates on SVs. */
408
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409/*
410=for apidoc Am|bool|SvNIOK|SV* sv
411Returns a boolean indicating whether the SV contains a number, integer or
412double.
413
414=for apidoc Am|bool|SvNIOKp|SV* sv
415Returns a boolean indicating whether the SV contains a number, integer or
416double. Checks the B<private> setting. Use C<SvNIOK>.
417
418=for apidoc Am|void|SvNIOK_off|SV* sv
419Unsets the NV/IV status of an SV.
420
421=for apidoc Am|bool|SvOK|SV* sv
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422Returns a boolean indicating whether the value is an SV. It also tells
423whether the value is defined or not.
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424
425=for apidoc Am|bool|SvIOKp|SV* sv
426Returns a boolean indicating whether the SV contains an integer. Checks
427the B<private> setting. Use C<SvIOK>.
428
429=for apidoc Am|bool|SvNOKp|SV* sv
430Returns a boolean indicating whether the SV contains a double. Checks the
431B<private> setting. Use C<SvNOK>.
432
433=for apidoc Am|bool|SvPOKp|SV* sv
434Returns a boolean indicating whether the SV contains a character string.
435Checks the B<private> setting. Use C<SvPOK>.
436
437=for apidoc Am|bool|SvIOK|SV* sv
438Returns a boolean indicating whether the SV contains an integer.
439
440=for apidoc Am|void|SvIOK_on|SV* sv
441Tells an SV that it is an integer.
442
443=for apidoc Am|void|SvIOK_off|SV* sv
444Unsets the IV status of an SV.
445
446=for apidoc Am|void|SvIOK_only|SV* sv
447Tells an SV that it is an integer and disables all other OK bits.
448
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449=for apidoc Am|void|SvIOK_only_UV|SV* sv
450Tells and SV that it is an unsigned integer and disables all other OK bits.
451
12fa07df 452=for apidoc Am|bool|SvIOK_UV|SV* sv
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453Returns a boolean indicating whether the SV contains an unsigned integer.
454
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455=for apidoc Am|void|SvUOK|SV* sv
456Returns a boolean indicating whether the SV contains an unsigned integer.
457
12fa07df 458=for apidoc Am|bool|SvIOK_notUV|SV* sv
d1be9408 459Returns a boolean indicating whether the SV contains a signed integer.
e331fc52 460
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461=for apidoc Am|bool|SvNOK|SV* sv
462Returns a boolean indicating whether the SV contains a double.
463
464=for apidoc Am|void|SvNOK_on|SV* sv
465Tells an SV that it is a double.
466
467=for apidoc Am|void|SvNOK_off|SV* sv
468Unsets the NV status of an SV.
469
470=for apidoc Am|void|SvNOK_only|SV* sv
471Tells an SV that it is a double and disables all other OK bits.
472
473=for apidoc Am|bool|SvPOK|SV* sv
474Returns a boolean indicating whether the SV contains a character
475string.
476
477=for apidoc Am|void|SvPOK_on|SV* sv
478Tells an SV that it is a string.
479
480=for apidoc Am|void|SvPOK_off|SV* sv
481Unsets the PV status of an SV.
482
483=for apidoc Am|void|SvPOK_only|SV* sv
484Tells an SV that it is a string and disables all other OK bits.
1e54db1a 485Will also turn off the UTF-8 status.
954c1994 486
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487=for apidoc Am|bool|SvVOK|SV* sv
488Returns a boolean indicating whether the SV contains a v-string.
489
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490=for apidoc Am|bool|SvOOK|SV* sv
491Returns a boolean indicating whether the SvIVX is a valid offset value for
492the SvPVX. This hack is used internally to speed up removal of characters
493from the beginning of a SvPV. When SvOOK is true, then the start of the
494allocated string buffer is really (SvPVX - SvIVX).
495
496=for apidoc Am|bool|SvROK|SV* sv
497Tests if the SV is an RV.
498
499=for apidoc Am|void|SvROK_on|SV* sv
500Tells an SV that it is an RV.
501
502=for apidoc Am|void|SvROK_off|SV* sv
503Unsets the RV status of an SV.
504
505=for apidoc Am|SV*|SvRV|SV* sv
506Dereferences an RV to return the SV.
507
508=for apidoc Am|IV|SvIVX|SV* sv
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509Returns the raw value in the SV's IV slot, without checks or conversions.
510Only use when you are sure SvIOK is true. See also C<SvIV()>.
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511
512=for apidoc Am|UV|SvUVX|SV* sv
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513Returns the raw value in the SV's UV slot, without checks or conversions.
514Only use when you are sure SvIOK is true. See also C<SvUV()>.
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515
516=for apidoc Am|NV|SvNVX|SV* sv
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517Returns the raw value in the SV's NV slot, without checks or conversions.
518Only use when you are sure SvNOK is true. See also C<SvNV()>.
954c1994
GS
519
520=for apidoc Am|char*|SvPVX|SV* sv
645c22ef 521Returns a pointer to the physical string in the SV. The SV must contain a
954c1994
GS
522string.
523
524=for apidoc Am|STRLEN|SvCUR|SV* sv
525Returns the length of the string which is in the SV. See C<SvLEN>.
526
527=for apidoc Am|STRLEN|SvLEN|SV* sv
659239a4
MG
528Returns the size of the string buffer in the SV, not including any part
529attributable to C<SvOOK>. See C<SvCUR>.
954c1994
GS
530
531=for apidoc Am|char*|SvEND|SV* sv
532Returns a pointer to the last character in the string which is in the SV.
533See C<SvCUR>. Access the character as *(SvEND(sv)).
534
535=for apidoc Am|HV*|SvSTASH|SV* sv
536Returns the stash of the SV.
537
538=for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
539Set the length of the string which is in the SV. See C<SvCUR>.
540
541=cut
542*/
543
79072805 544#define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
748a9306 545#define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
a0d0e21e 546#define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
25da4f38 547 SVp_IOK|SVp_NOK|SVf_IVisUV))
79072805 548
5dc8bdac 549#if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
29e97371 550#define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
906ed6d6 551#else
54866b45 552#define assert_not_ROK(sv)
906ed6d6
NC
553#endif
554
463ee0b2 555#define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
54866b45 556#define SvOK_off(sv) (assert_not_ROK(sv) \
906ed6d6 557 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
d41ff1b8 558 SVf_IVisUV|SVf_UTF8), \
25da4f38 559 SvOOK_off(sv))
54866b45 560#define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
906ed6d6 561 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
d41ff1b8 562 SVf_UTF8), \
a0d0e21e 563 SvOOK_off(sv))
79072805 564
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565#define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
566#define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
46187eeb 567#define SvIOKp_on(sv) (SvRELEASE_IVX(sv), \
765f542d 568 SvFLAGS(sv) |= SVp_IOK)
8990e307
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569#define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
570#define SvNOKp_on(sv) (SvFLAGS(sv) |= SVp_NOK)
571#define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
54866b45 572#define SvPOKp_on(sv) (assert_not_ROK(sv) \
906ed6d6 573 SvFLAGS(sv) |= SVp_POK)
463ee0b2 574
79072805 575#define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
46187eeb 576#define SvIOK_on(sv) (SvRELEASE_IVX(sv), \
765f542d 577 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
25da4f38 578#define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
0c34ef67 579#define SvIOK_only(sv) (SvOK_off(sv), \
a0d0e21e 580 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
0c34ef67 581#define SvIOK_only_UV(sv) (SvOK_off_exc_UV(sv), \
25da4f38 582 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
70401c6b 583
25da4f38
IZ
584#define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
585 == (SVf_IOK|SVf_IVisUV))
28e5dec8 586#define SvUOK(sv) SvIOK_UV(sv)
25da4f38
IZ
587#define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
588 == SVf_IOK)
589
590#define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
591#define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
592#define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
79072805
LW
593
594#define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
a0d0e21e 595#define SvNOK_on(sv) (SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
8990e307 596#define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
0c34ef67 597#define SvNOK_only(sv) (SvOK_off(sv), \
a0d0e21e 598 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
79072805 599
914184e1 600/*
12fa07df 601=for apidoc Am|bool|SvUTF8|SV* sv
914184e1
JH
602Returns a boolean indicating whether the SV contains UTF-8 encoded data.
603
604=for apidoc Am|void|SvUTF8_on|SV *sv
1e54db1a 605Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
d5ce4a7c 606Do not use frivolously.
914184e1
JH
607
608=for apidoc Am|void|SvUTF8_off|SV *sv
1e54db1a 609Unsets the UTF-8 status of an SV.
914184e1
JH
610
611=for apidoc Am|void|SvPOK_only_UTF8|SV* sv
d5ce4a7c 612Tells an SV that it is a string and disables all other OK bits,
1e54db1a 613and leaves the UTF-8 status as it was.
f1a1024e 614
914184e1
JH
615=cut
616 */
617
7a5fd60d
NC
618/* Ensure the return value of this macro does not clash with the GV_ADD* flags
619in gv.h: */
a7cb1f99
GS
620#define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
621#define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
622#define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
5bc28da9 623
79072805 624#define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
54866b45 625#define SvPOK_on(sv) (assert_not_ROK(sv) \
906ed6d6 626 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
8990e307 627#define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
54866b45 628#define SvPOK_only(sv) (assert_not_ROK(sv) \
906ed6d6 629 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
d41ff1b8
GS
630 SVf_IVisUV|SVf_UTF8), \
631 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
54866b45 632#define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) \
906ed6d6 633 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \
d41ff1b8 634 SVf_IVisUV), \
a0d0e21e 635 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
79072805 636
b0f01acb 637#define SvVOK(sv) (SvMAGICAL(sv) && mg_find(sv,'V'))
79072805 638#define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
155aba94 639#define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
0c34ef67 640#define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv)))
79072805 641
a0d0e21e
LW
642#define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
643#define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
644#define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
645
ed6116ce 646#define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
a0d0e21e 647#define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
a0d0e21e 648#define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVf_AMAGIC))
79072805 649
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650#define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
651#define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
652#define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
79072805 653
8990e307
LW
654#define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
655#define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
656#define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
ed6116ce 657
8990e307
LW
658#define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
659#define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
660#define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
ed6116ce 661
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662#define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
663#define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
664#define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
ed6116ce 665
9e7bc3e8
JD
666#define SvAMAGIC(sv) (SvFLAGS(sv) & SVf_AMAGIC)
667#define SvAMAGIC_on(sv) (SvFLAGS(sv) |= SVf_AMAGIC)
668#define SvAMAGIC_off(sv) (SvFLAGS(sv) &= ~SVf_AMAGIC)
a0d0e21e 669
8cf8f3d1 670#define SvGAMAGIC(sv) (SvFLAGS(sv) & (SVs_GMG|SVf_AMAGIC))
1426bbf4 671
a0d0e21e
LW
672/*
673#define Gv_AMG(stash) \
674 (HV_AMAGICmb(stash) && \
675 ((!HV_AMAGICbad(stash) && HV_AMAGIC(stash)) || Gv_AMupdate(stash)))
676*/
3280af22 677#define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash))
a0d0e21e 678
810b8aa5
GS
679#define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
680 == (SVf_ROK|SVprv_WEAKREF))
681#define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
682#define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
683
a0d0e21e 684#define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
ed6116ce 685
d9d18af6
DM
686#define SvPADSTALE(sv) (SvFLAGS(sv) & SVs_PADSTALE)
687#define SvPADSTALE_on(sv) (SvFLAGS(sv) |= SVs_PADSTALE)
688#define SvPADSTALE_off(sv) (SvFLAGS(sv) &= ~SVs_PADSTALE)
689
8990e307 690#define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP)
235cc2e3 691#define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
8990e307 692#define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
ed6116ce 693
8990e307 694#define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY)
235cc2e3 695#define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY)
ed6116ce 696
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697#define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
698#define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
699#define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
79072805 700
8990e307
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701#define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
702#define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
703#define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
79072805 704
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705#define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY)
706#define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
707#define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
79072805 708
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LW
709#define SvSCREAM(sv) (SvFLAGS(sv) & SVp_SCREAM)
710#define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
711#define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
79072805 712
8990e307
LW
713#define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED)
714#define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED)
715#define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED)
79072805 716
25da4f38
IZ
717#define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL)
718#define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL)
719#define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL)
720
8990e307
LW
721#define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL)
722#define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL)
723#define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL)
724
8990e307
LW
725#define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID)
726#define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID)
727#define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID)
728
1cc8b4c5
AB
729#ifdef USE_ITHREADS
730/* The following uses the FAKE flag to show that a regex pointer is infact
8ca6097c 731 its own offset in the regexpad for ithreads */
1cc8b4c5
AB
732#define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE)
733#define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
734#define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
735#endif
736
b162af07
SP
737#ifdef PERL_DEBUG_COW
738#define SvRV(sv) (0 + ((XRV*) SvANY(sv))->xrv_rv)
739#else
ed6116ce 740#define SvRV(sv) ((XRV*) SvANY(sv))->xrv_rv
b162af07 741#endif
ed6116ce
LW
742#define SvRVx(sv) SvRV(sv)
743
f599b64b 744#ifdef PERL_DEBUG_COW
62703e72
NC
745#define SvIVX(sv) (0 + ((XPVIV*) SvANY(sv))->xiv_iv)
746#define SvUVX(sv) (0 + ((XPVUV*) SvANY(sv))->xuv_uv)
747#define SvNVX(sv) (0 + ((XPVNV*) SvANY(sv))->xnv_nv)
748#define SvPVX(sv) (0 + ((XPV*) SvANY(sv))->xpv_pv)
749#define SvCUR(sv) (0 + ((XPV*) SvANY(sv))->xpv_cur)
750#define SvLEN(sv) (0 + ((XPV*) SvANY(sv))->xpv_len)
751#define SvEND(sv) (((XPV*) SvANY(sv))->xpv_pv + ((XPV*)SvANY(sv))->xpv_cur)
752
03687789
SP
753#ifdef DEBUGGING
754# ifdef PERL_IN_SV_C
62703e72 755/* Can't make this RVALUE because of Perl_sv_unmagic. */
03687789
SP
756# define SvMAGIC(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
757# else
758# define SvMAGIC(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
759# endif
760#define SvSTASH(sv) (0 + *(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
f599b64b 761#else
03687789
SP
762# ifdef PERL_IN_SV_C
763# define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
764# else
765# define SvMAGIC(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_magic)
766# endif
767#define SvSTASH(sv) (0 + ((XPVMG*) SvANY(sv))->xmg_stash)
b162af07 768#endif
62703e72
NC
769#else
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#define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
775#define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
776#define SvEND(sv) (((XPV*) SvANY(sv))->xpv_pv + ((XPV*)SvANY(sv))->xpv_cur)
ffb05e06
NC
777
778#ifdef DEBUGGING
2b057284
NC
779#define SvMAGIC(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_magic))
780#define SvSTASH(sv) (*(assert(SvTYPE(sv) >= SVt_PVMG), &((XPVMG*) SvANY(sv))->xmg_stash))
ffb05e06 781#else
79072805
LW
782#define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
783#define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
ffb05e06 784#endif
79072805 785
62703e72
NC
786#endif
787
788#define SvIVXx(sv) SvIVX(sv)
789#define SvUVXx(sv) SvUVX(sv)
790#define SvNVXx(sv) SvNVX(sv)
791#define SvPVXx(sv) SvPVX(sv)
792#define SvLENx(sv) SvLEN(sv)
793#define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
794
795
28e5dec8
JH
796/* Ask a scalar nicely to try to become an IV, if possible.
797 Not guaranteed to stay returning void */
798/* Macro won't actually call sv_2iv if already IOK */
799#define SvIV_please(sv) \
800 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \
801 (void) SvIV(sv); } STMT_END
79072805 802#define SvIV_set(sv, val) \
80b92232 803 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
b19bbeda 804 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
79072805 805#define SvNV_set(sv, val) \
80b92232 806 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
f599b64b 807 (((XPVNV*)SvANY(sv))->xnv_nv = (val)); } STMT_END
79072805 808#define SvPV_set(sv, val) \
80b92232 809 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
379d1ffd 810 (((XPV*) SvANY(sv))->xpv_pv = (val)); } STMT_END
607fa7f2
SP
811#define SvUV_set(sv, val) \
812 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
813 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
b162af07
SP
814#define SvRV_set(sv, val) \
815 STMT_START { assert(SvTYPE(sv) >= SVt_RV); \
816 (((XRV*)SvANY(sv))->xrv_rv = (val)); } STMT_END
817#define SvMAGIC_set(sv, val) \
818 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
819 (((XPVMG*)SvANY(sv))->xmg_magic = (val)); } STMT_END
820#define SvSTASH_set(sv, val) \
821 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
822 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
79072805 823#define SvCUR_set(sv, val) \
80b92232 824 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
b162af07 825 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
79072805 826#define SvLEN_set(sv, val) \
80b92232 827 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
b162af07 828 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
7ae8ee9e
NC
829#define SvEND_set(sv, val) \
830 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
831 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END
79072805 832
b7e9a5c2 833#define SvPV_renew(sv,n) \
1da4ca5f
NC
834 STMT_START { SvLEN_set(sv, n); \
835 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
836 (char*)saferealloc((Malloc_t)SvPVX(sv), \
837 (MEM_SIZE)((n))))); \
838 } STMT_END
839
840#define SvPV_shrink_to_cur(sv) STMT_START { \
841 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
842 SvPV_renew(sv, _lEnGtH); \
843 } STMT_END
b7e9a5c2 844
8bd4d4c5
NC
845#define SvPV_free(sv) \
846 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
847 if (SvLEN(sv)) { \
848 if(SvOOK(sv)) { \
849 Safefree(SvPVX(sv) - SvIVX(sv)); \
850 SvFLAGS(sv) &= ~SVf_OOK; \
851 } else { \
852 Safefree(SvPVX(sv)); \
853 } \
854 } \
855 } STMT_END
856
79072805
LW
857#define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
858#define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
859#define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
860
861#define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
862
863#define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
864#define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
865#define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
866#define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
867
8990e307
LW
868#define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp
869#define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
870#define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
4755096e 871#define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
8990e307
LW
872#define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines
873#define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
874#define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
875#define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
876#define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
877#define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
878#define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
879#define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
880#define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
881#define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
882#define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess
883#define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
884#define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
885
50952442 886/* IoTYPE(sv) is a single character telling the type of I/O connection. */
3b6c1aba
JH
887#define IoTYPE_RDONLY '<'
888#define IoTYPE_WRONLY '>'
889#define IoTYPE_RDWR '+'
890#define IoTYPE_APPEND 'a'
891#define IoTYPE_PIPE '|'
892#define IoTYPE_STD '-' /* stdin or stdout */
893#define IoTYPE_SOCKET 's'
894#define IoTYPE_CLOSED ' '
895#define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
896#define IoTYPE_NUMERIC '#' /* fdopen */
03fcf2fc
GS
897
898/*
954c1994
GS
899=for apidoc Am|bool|SvTAINTED|SV* sv
900Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
901not.
902
903=for apidoc Am|void|SvTAINTED_on|SV* sv
c55831ac 904Marks an SV as tainted if tainting is enabled.
954c1994
GS
905
906=for apidoc Am|void|SvTAINTED_off|SV* sv
907Untaints an SV. Be I<very> careful with this routine, as it short-circuits
908some of Perl's fundamental security features. XS module authors should not
909use this function unless they fully understand all the implications of
910unconditionally untainting the value. Untainting should be done in the
911standard perl fashion, via a carefully crafted regexp, rather than directly
912untainting variables.
913
914=for apidoc Am|void|SvTAINT|SV* sv
c55831ac 915Taints an SV if tainting is enabled.
954c1994
GS
916
917=cut
918*/
919
bbce6d69 920#define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
3280af22
NIS
921#define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END
922#define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END
bbce6d69 923
c6ee37c5
MB
924#define SvTAINT(sv) \
925 STMT_START { \
3280af22 926 if (PL_tainting) { \
3280af22 927 if (PL_tainted) \
c6ee37c5
MB
928 SvTAINTED_on(sv); \
929 } \
930 } STMT_END
79072805 931
954c1994
GS
932/*
933=for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
5f08bad4
ST
934Like C<SvPV> but will force the SV into containing just a string
935(C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
936directly.
954c1994 937
645c22ef 938=for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
5f08bad4
ST
939Like C<SvPV> but will force the SV into containing just a string
940(C<SvPOK_only>). You want force if you are going to update the C<SvPVX>
941directly. Doesn't process magic.
645c22ef 942
954c1994 943=for apidoc Am|char*|SvPV|SV* sv|STRLEN len
5f08bad4
ST
944Returns a pointer to the string in the SV, or a stringified form of
945the SV if the SV does not contain a string. The SV may cache the
946stringified version becoming C<SvPOK>. Handles 'get' magic. See also
645c22ef
DM
947C<SvPVx> for a version which guarantees to evaluate sv only once.
948
949=for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
950A version of C<SvPV> which guarantees to evaluate sv only once.
954c1994 951
891f9566
YST
952=for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
953Like C<SvPV> but doesn't process magic.
954
954c1994 955=for apidoc Am|char*|SvPV_nolen|SV* sv
5f08bad4
ST
956Returns a pointer to the string in the SV, or a stringified form of
957the SV if the SV does not contain a string. The SV may cache the
958stringified form becoming C<SvPOK>. Handles 'get' magic.
954c1994
GS
959
960=for apidoc Am|IV|SvIV|SV* sv
645c22ef
DM
961Coerces the given SV to an integer and returns it. See C<SvIVx> for a
962version which guarantees to evaluate sv only once.
963
891f9566
YST
964=for apidoc Am|IV|SvIV_nomg|SV* sv
965Like C<SvIV> but doesn't process magic.
966
645c22ef
DM
967=for apidoc Am|IV|SvIVx|SV* sv
968Coerces the given SV to an integer and returns it. Guarantees to evaluate
d1be9408 969sv only once. Use the more efficient C<SvIV> otherwise.
954c1994
GS
970
971=for apidoc Am|NV|SvNV|SV* sv
645c22ef
DM
972Coerce the given SV to a double and return it. See C<SvNVx> for a version
973which guarantees to evaluate sv only once.
974
975=for apidoc Am|NV|SvNVx|SV* sv
976Coerces the given SV to a double and returns it. Guarantees to evaluate
d1be9408 977sv only once. Use the more efficient C<SvNV> otherwise.
954c1994
GS
978
979=for apidoc Am|UV|SvUV|SV* sv
645c22ef
DM
980Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
981for a version which guarantees to evaluate sv only once.
982
891f9566
YST
983=for apidoc Am|UV|SvUV_nomg|SV* sv
984Like C<SvUV> but doesn't process magic.
985
645c22ef
DM
986=for apidoc Am|UV|SvUVx|SV* sv
987Coerces the given SV to an unsigned integer and returns it. Guarantees to
d1be9408 988evaluate sv only once. Use the more efficient C<SvUV> otherwise.
954c1994
GS
989
990=for apidoc Am|bool|SvTRUE|SV* sv
991Returns a boolean indicating whether Perl would evaluate the SV as true or
992false, defined or undefined. Does not handle 'get' magic.
993
645c22ef 994=for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
b70b15d2 995Like C<SvPV_force>, but converts sv to utf8 first if necessary.
645c22ef
DM
996
997=for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
b70b15d2 998Like C<SvPV>, but converts sv to utf8 first if necessary.
645c22ef 999
b70b15d2
TJ
1000=for apidoc Am|char*|SvPVutf8_nolen|SV* sv
1001Like C<SvPV_nolen>, but converts sv to utf8 first if necessary.
645c22ef
DM
1002
1003=for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
1004Like C<SvPV_force>, but converts sv to byte representation first if necessary.
1005
1006=for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
1007Like C<SvPV>, but converts sv to byte representation first if necessary.
1008
b70b15d2 1009=for apidoc Am|char*|SvPVbyte_nolen|SV* sv
645c22ef
DM
1010Like C<SvPV_nolen>, but converts sv to byte representation first if necessary.
1011
1012=for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
b70b15d2 1013Like C<SvPV_force>, but converts sv to utf8 first if necessary.
d1be9408 1014Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force>
645c22ef
DM
1015otherwise.
1016
1017=for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
b70b15d2 1018Like C<SvPV>, but converts sv to utf8 first if necessary.
d1be9408 1019Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8>
645c22ef
DM
1020otherwise.
1021
1022=for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
1023Like C<SvPV_force>, but converts sv to byte representation first if necessary.
d1be9408 1024Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force>
645c22ef
DM
1025otherwise.
1026
1027=for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
1028Like C<SvPV>, but converts sv to byte representation first if necessary.
d1be9408 1029Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte>
645c22ef
DM
1030otherwise.
1031
19dbb8f1
NC
1032=for apidoc Am|bool|SvIsCOW|SV* sv
1033Returns a boolean indicating whether the SV is Copy-On-Write. (either shared
1034hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
1035COW)
1036
1037=for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1038Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1039scalar.
645c22ef 1040
0f76ff59
MHM
1041=for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1042Like C<sv_catpvn> but doesn't process magic.
1043
1044=for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1045Like C<sv_setsv> but doesn't process magic.
1046
1047=for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1048Like C<sv_catsv> but doesn't process magic.
1049
954c1994
GS
1050=cut
1051*/
1052
25da4f38 1053/* Let us hope that bitmaps for UV and IV are the same */
463ee0b2 1054#define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
ff68c719 1055#define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv))
463ee0b2 1056#define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
79072805 1057
891f9566
YST
1058#define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1059#define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
1060
baca2b92 1061/* ----*/
8d6d96c1 1062
8d6d96c1
HS
1063#define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1064
8d6d96c1
HS
1065#define SvPV_flags(sv, lp, flags) \
1066 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1067 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
79072805 1068
8d6d96c1 1069#define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
baca2b92 1070
8d6d96c1
HS
1071#define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
1072
8d6d96c1 1073#define SvPV_force_flags(sv, lp, flags) \
ff68c719 1074 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \
8d6d96c1 1075 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
a0d0e21e 1076
1fa8b10d 1077#define SvPV_nolen(sv) \
5bc28da9
NIS
1078 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \
1079 ? SvPVX(sv) : sv_2pv_nolen(sv))
70401c6b 1080
baca2b92 1081#define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
5bc28da9 1082
baca2b92 1083/* ----*/
70401c6b 1084
5bc28da9
NIS
1085#define SvPVutf8(sv, lp) \
1086 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \
1087 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
70401c6b 1088
5bc28da9 1089#define SvPVutf8_force(sv, lp) \
70401c6b 1090 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \
5bc28da9
NIS
1091 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1092
baca2b92 1093
5bc28da9
NIS
1094#define SvPVutf8_nolen(sv) \
1095 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\
1096 ? SvPVX(sv) : sv_2pvutf8_nolen(sv))
70401c6b 1097
baca2b92
DM
1098/* ----*/
1099
5bc28da9
NIS
1100#define SvPVbyte(sv, lp) \
1101 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
1102 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
70401c6b 1103
5bc28da9
NIS
1104#define SvPVbyte_force(sv, lp) \
1105 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \
a7ec4e2e 1106 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
5bc28da9 1107
5bc28da9
NIS
1108#define SvPVbyte_nolen(sv) \
1109 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\
1110 ? SvPVX(sv) : sv_2pvbyte_nolen(sv))
70401c6b 1111
1fa8b10d 1112
baca2b92
DM
1113
1114/* define FOOx(): idempotent versions of FOO(). If possible, use a local
1115 * var to evaluate the arg once; failing that, use a global if possible;
1116 * failing that, call a function to do the work
1117 */
1118
1119#define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1120#define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1121#define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1122
5dc8bdac 1123#if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
baca2b92 1124
3de3296f
AE
1125# define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); })
1126# define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); })
1127# define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); })
1128# define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
1129# define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1130# define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
a80f87c4 1131# define SvTRUE(sv) ( \
8990e307
LW
1132 !sv \
1133 ? 0 \
1134 : SvPOK(sv) \
a80f87c4
GS
1135 ? (({XPV *nxpv = (XPV*)SvANY(sv); \
1136 nxpv && \
c2f1de04 1137 (nxpv->xpv_cur > 1 || \
a80f87c4 1138 (nxpv->xpv_cur && *nxpv->xpv_pv != '0')); }) \
79072805
LW
1139 ? 1 \
1140 : 0) \
1141 : \
1142 SvIOK(sv) \
463ee0b2 1143 ? SvIVX(sv) != 0 \
79072805 1144 : SvNOK(sv) \
463ee0b2
LW
1145 ? SvNVX(sv) != 0.0 \
1146 : sv_2bool(sv) )
3de3296f 1147# define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
baca2b92 1148
a80f87c4 1149#else /* __GNUC__ */
baca2b92 1150
a80f87c4
GS
1151/* These inlined macros use globals, which will require a thread
1152 * declaration in user code, so we avoid them under threads */
1153
3db8f154
MB
1154# define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1155# define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1156# define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1157# define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
1158# define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1159# define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
1160# define SvTRUE(sv) ( \
a80f87c4
GS
1161 !sv \
1162 ? 0 \
1163 : SvPOK(sv) \
6b88bc9c 1164 ? ((PL_Xpv = (XPV*)SvANY(sv)) && \
c2f1de04 1165 (PL_Xpv->xpv_cur > 1 || \
6b88bc9c 1166 (PL_Xpv->xpv_cur && *PL_Xpv->xpv_pv != '0')) \
a80f87c4
GS
1167 ? 1 \
1168 : 0) \
1169 : \
1170 SvIOK(sv) \
1171 ? SvIVX(sv) != 0 \
1172 : SvNOK(sv) \
1173 ? SvNVX(sv) != 0.0 \
1174 : sv_2bool(sv) )
3db8f154 1175# define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
baca2b92
DM
1176#endif /* __GNU__ */
1177
765f542d
NC
1178#define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \
1179 (SVf_FAKE | SVf_READONLY))
46187eeb 1180#define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
baca2b92
DM
1181
1182/* flag values for sv_*_flags functions */
1183#define SV_IMMEDIATE_UNREF 1
1184#define SV_GMAGIC 2
765f542d 1185#define SV_COW_DROP_PV 4
88632417 1186#define SV_UTF8_NO_ENCODING 8
5fcdf167 1187#define SV_NOSTEAL 16
765f542d 1188
46187eeb
NC
1189/* We are about to replace the SV's current value. So if it's copy on write
1190 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1191 the value is about to get thrown away, so drop the PV rather than go to
1192 the effort of making a read-write copy only for it to get immediately
1193 discarded. */
765f542d
NC
1194
1195#define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1196 sv_force_normal_flags(sv, SV_COW_DROP_PV)
46187eeb
NC
1197
1198#ifdef PERL_COPY_ON_WRITE
1199# define SvRELEASE_IVX(sv) ((void)((SvFLAGS(sv) & (SVf_OOK|SVf_READONLY|SVf_FAKE)) \
b885210e 1200 && Perl_sv_release_IVX(aTHX_ sv)))
46187eeb 1201# define SvIsCOW_normal(sv) (SvIsCOW(sv) && SvLEN(sv))
ed252734
NC
1202
1203#define CAN_COW_MASK (SVs_OBJECT|SVs_GMG|SVs_SMG|SVs_RMG|SVf_IOK|SVf_NOK| \
1204 SVf_POK|SVf_ROK|SVp_IOK|SVp_NOK|SVp_POK|SVf_FAKE| \
1205 SVf_OOK|SVf_BREAK|SVf_READONLY|SVf_AMAGIC)
1206#define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1207
765f542d 1208#else
0c34ef67 1209# define SvRELEASE_IVX(sv) SvOOK_off(sv)
765f542d 1210#endif /* PERL_COPY_ON_WRITE */
46187eeb 1211
765f542d
NC
1212#define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1213 sv_force_normal_flags(sv, 0)
1214
1215
baca2b92
DM
1216/* all these 'functions' are now just macros */
1217
1218#define sv_pv(sv) SvPV_nolen(sv)
1219#define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1220#define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1221
1222#define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
1223#define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1224#define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
1225#define sv_setsv(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_GMAGIC)
1226#define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, 0)
1227#define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1228#define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
1229#define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
1230#define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
1231#define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1232#define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1233#define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
891f9566
YST
1234#define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1235#define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
baca2b92 1236
db79b45b
JH
1237/* Should be named SvCatPVN_utf8_upgrade? */
1238#define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \
1239 STMT_START { \
1240 if (!(nsv)) \
1241 nsv = sv_2mortal(newSVpvn(sstr, slen)); \
1242 else \
1243 sv_setpvn(nsv, sstr, slen); \
1244 SvUTF8_off(nsv); \
1245 sv_utf8_upgrade(nsv); \
1246 sv_catsv(dsv, nsv); \
1247 } STMT_END
79072805 1248
954c1994
GS
1249/*
1250=for apidoc Am|SV*|newRV_inc|SV* sv
1251
1252Creates an RV wrapper for an SV. The reference count for the original SV is
1253incremented.
1254
1255=cut
1256*/
1257
5f05dabc 1258#define newRV_inc(sv) newRV(sv)
5f05dabc 1259
ef50df4b 1260/* the following macros update any magic values this sv is associated with */
79072805 1261
954c1994 1262/*
ccfc67b7
JH
1263=head1 Magical Functions
1264
954c1994
GS
1265=for apidoc Am|void|SvGETMAGIC|SV* sv
1266Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its
1267argument more than once.
1268
1269=for apidoc Am|void|SvSETMAGIC|SV* sv
1270Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its
1271argument more than once.
1272
1273=for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv
1274Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments
1275more than once.
1276
1277=for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
1278Calls a non-destructive version of C<sv_setsv> if dsv is not the same as
1279ssv. May evaluate arguments more than once.
1280
645c22ef
DM
1281=for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv
1282Like C<SvSetSV>, but does any set magic required afterwards.
1283
1284=for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
80663158 1285Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
645c22ef 1286
68795e93
NIS
1287=for apidoc Am|void|SvSHARE|SV* sv
1288Arranges for sv to be shared between threads if a suitable module
1289has been loaded.
1290
1291=for apidoc Am|void|SvLOCK|SV* sv
1292Arranges for a mutual exclusion lock to be obtained on sv if a suitable module
1293has been loaded.
1294
1295=for apidoc Am|void|SvUNLOCK|SV* sv
1296Releases a mutual exclusion lock on sv if a suitable module
1297has been loaded.
1298
ccfc67b7
JH
1299=head1 SV Manipulation Functions
1300
679ac26e 1301=for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
954c1994
GS
1302Expands the character buffer in the SV so that it has room for the
1303indicated number of bytes (remember to reserve space for an extra trailing
8cf8f3d1 1304NUL character). Calls C<sv_grow> to perform the expansion if necessary.
954c1994
GS
1305Returns a pointer to the character buffer.
1306
1307=cut
1308*/
1309
68795e93
NIS
1310#define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv)
1311#define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv)
1312#define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv)
1313
189b2af5
GS
1314#define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END
1315#define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END
79072805 1316
54310121 1317#define SvSetSV_and(dst,src,finally) \
189b2af5 1318 STMT_START { \
54310121
PP
1319 if ((dst) != (src)) { \
1320 sv_setsv(dst, src); \
1321 finally; \
189b2af5
GS
1322 } \
1323 } STMT_END
54310121 1324#define SvSetSV_nosteal_and(dst,src,finally) \
189b2af5 1325 STMT_START { \
8ebc5c01 1326 if ((dst) != (src)) { \
5fcdf167 1327 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL); \
54310121 1328 finally; \
189b2af5
GS
1329 } \
1330 } STMT_END
79072805 1331
54310121 1332#define SvSetSV(dst,src) \
c9d716f7 1333 SvSetSV_and(dst,src,/*nothing*/;)
54310121 1334#define SvSetSV_nosteal(dst,src) \
c9d716f7 1335 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
54310121
PP
1336
1337#define SvSetMagicSV(dst,src) \
1338 SvSetSV_and(dst,src,SvSETMAGIC(dst))
1339#define SvSetMagicSV_nosteal(dst,src) \
1340 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
1341
db79b45b 1342
1045810a 1343#if !defined(SKIP_DEBUGGING)
79072805 1344#define SvPEEK(sv) sv_peek(sv)
3967c732
JD
1345#else
1346#define SvPEEK(sv) ""
1347#endif
79072805 1348
5dc8bdac 1349#define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder)
36477c24 1350
3280af22 1351#define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
54310121 1352
79072805
LW
1353#define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
1354
933fea7f
GS
1355#define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
1356#define Sv_Grow sv_grow
3d35f11b 1357
a0739874
DM
1358#define CLONEf_COPY_STACKS 1
1359#define CLONEf_KEEP_PTR_TABLE 2
c43294b8 1360#define CLONEf_CLONE_HOST 4
0405e91e 1361#define CLONEf_JOIN_IN 8
a0739874 1362
8cf8f3d1 1363struct clone_params {
d2d73c3e
AB
1364 AV* stashes;
1365 UV flags;
59b40662 1366 PerlInterpreter *proto_perl;
8cf8f3d1 1367};