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PATCH: [perl #130801] perlapi: Clarify SvIV/SvUV/SvNV behavior
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a0d0e21e 1/* sv.h
79072805 2 *
1129b882 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
83706693 4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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
75af9d73 19An enum of flags for Perl types. These are found in the file F<sv.h>
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20in the C<svtype> enum. Test these flags with the C<SvTYPE> macro.
21
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22The types are:
23
24 SVt_NULL
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25 SVt_IV
26 SVt_NV
27 SVt_RV
28 SVt_PV
29 SVt_PVIV
30 SVt_PVNV
31 SVt_PVMG
e94d9b54 32 SVt_INVLIST
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33 SVt_REGEXP
34 SVt_PVGV
35 SVt_PVLV
36 SVt_PVAV
37 SVt_PVHV
38 SVt_PVCV
39 SVt_PVFM
40 SVt_PVIO
41
42These are most easily explained from the bottom up.
43
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44C<SVt_PVIO> is for I/O objects, C<SVt_PVFM> for formats, C<SVt_PVCV> for
45subroutines, C<SVt_PVHV> for hashes and C<SVt_PVAV> for arrays.
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46
47All the others are scalar types, that is, things that can be bound to a
48C<$> variable. For these, the internal types are mostly orthogonal to
49types in the Perl language.
50
51Hence, checking C<< SvTYPE(sv) < SVt_PVAV >> is the best way to see whether
52something is a scalar.
53
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54C<SVt_PVGV> represents a typeglob. If C<!SvFAKE(sv)>, then it is a real,
55incoercible typeglob. If C<SvFAKE(sv)>, then it is a scalar to which a
a5e62da0 56typeglob has been assigned. Assigning to it again will stop it from being
796b6530 57a typeglob. C<SVt_PVLV> represents a scalar that delegates to another scalar
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58behind the scenes. It is used, e.g., for the return value of C<substr> and
59for tied hash and array elements. It can hold any scalar value, including
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60a typeglob. C<SVt_REGEXP> is for regular
61expressions. C<SVt_INVLIST> is for Perl
e94d9b54 62core internal use only.
a5e62da0 63
796b6530 64C<SVt_PVMG> represents a "normal" scalar (not a typeglob, regular expression,
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65or delegate). Since most scalars do not need all the internal fields of a
66PVMG, we save memory by allocating smaller structs when possible. All the
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67other types are just simpler forms of C<SVt_PVMG>, with fewer internal fields.
68C<SVt_NULL> can only hold undef. C<SVt_IV> can hold undef, an integer, or a
69reference. (C<SVt_RV> is an alias for C<SVt_IV>, which exists for backward
70compatibility.) C<SVt_NV> can hold any of those or a double. C<SVt_PV> can only
71hold C<undef> or a string. C<SVt_PVIV> is a superset of C<SVt_PV> and C<SVt_IV>.
72C<SVt_PVNV> is similar. C<SVt_PVMG> can hold anything C<SVt_PVNV> can hold, but it
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73can, but does not have to, be blessed or magical.
74
75=for apidoc AmU||SVt_NULL
76Type flag for scalars. See L</svtype>.
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77
78=for apidoc AmU||SVt_IV
a5e62da0 79Type flag for scalars. See L</svtype>.
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80
81=for apidoc AmU||SVt_NV
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82Type flag for scalars. See L</svtype>.
83
84=for apidoc AmU||SVt_PV
85Type flag for scalars. See L</svtype>.
86
87=for apidoc AmU||SVt_PVIV
88Type flag for scalars. See L</svtype>.
89
90=for apidoc AmU||SVt_PVNV
91Type flag for scalars. See L</svtype>.
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92
93=for apidoc AmU||SVt_PVMG
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94Type flag for scalars. See L</svtype>.
95
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96=for apidoc AmU||SVt_INVLIST
97Type flag for scalars. See L</svtype>.
98
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99=for apidoc AmU||SVt_REGEXP
100Type flag for regular expressions. See L</svtype>.
101
102=for apidoc AmU||SVt_PVGV
103Type flag for typeglobs. See L</svtype>.
104
105=for apidoc AmU||SVt_PVLV
106Type flag for scalars. See L</svtype>.
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107
108=for apidoc AmU||SVt_PVAV
a5e62da0 109Type flag for arrays. See L</svtype>.
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110
111=for apidoc AmU||SVt_PVHV
a5e62da0 112Type flag for hashes. See L</svtype>.
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113
114=for apidoc AmU||SVt_PVCV
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115Type flag for subroutines. See L</svtype>.
116
117=for apidoc AmU||SVt_PVFM
118Type flag for formats. See L</svtype>.
119
120=for apidoc AmU||SVt_PVIO
121Type flag for I/O objects. See L</svtype>.
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122
123=cut
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124
125 These are ordered so that the simpler types have a lower value; SvUPGRADE
126 doesn't allow you to upgrade from a higher numbered type to a lower numbered
127 one; also there is code that assumes that anything that has as a PV component
128 has a type numbered >= SVt_PV.
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129*/
130
1078c6a2 131
79072805 132typedef enum {
a0d0e21e 133 SVt_NULL, /* 0 */
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134 /* BIND was here, before INVLIST replaced it. */
135 SVt_IV, /* 1 */
136 SVt_NV, /* 2 */
4df7f6af 137 /* RV was here, before it was merged with IV. */
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138 SVt_PV, /* 3 */
139 SVt_INVLIST, /* 4, implemented as a PV */
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140 SVt_PVIV, /* 5 */
141 SVt_PVNV, /* 6 */
142 SVt_PVMG, /* 7 */
5c35adbb 143 SVt_REGEXP, /* 8 */
cecf5685 144 /* PVBM was here, before BIND replaced it. */
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145 SVt_PVGV, /* 9 */
146 SVt_PVLV, /* 10 */
147 SVt_PVAV, /* 11 */
148 SVt_PVHV, /* 12 */
149 SVt_PVCV, /* 13 */
a0d0e21e 150 SVt_PVFM, /* 14 */
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151 SVt_PVIO, /* 15 */
152 SVt_LAST /* keep last in enum. used to size arrays */
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153} svtype;
154
f1fb8741 155/* *** any alterations to the SV types above need to be reflected in
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156 * SVt_MASK and the various PL_valid_types_* tables. As of this writing those
157 * tables are in perl.h. There are also two affected names tables in dump.c,
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158 * one in B.xs, and 'bodies_by_type[]' in sv.c.
159 *
160 * The bits that match 0xf0 are CURRENTLY UNUSED, except that 0xFF means a
161 * freed SV. The bits above that are for flags, like SVf_IOK */
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162
163#define SVt_MASK 0xf /* smallest bitmask that covers all types */
164
cecf5685 165#ifndef PERL_CORE
a5c7cb08 166/* Fast Boyer Moore tables are now stored in magic attached to PVMGs */
cecf5685 167# define SVt_PVBM SVt_PVMG
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168/* Anything wanting to create a reference from clean should ensure that it has
169 a scalar of type SVt_IV now: */
170# define SVt_RV SVt_IV
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171#endif
172
d2a0f284 173/* There is collusion here with sv_clear - sv_clear exits early for SVt_NULL
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174 so never reaches the clause at the end that uses sv_type_details->body_size
175 to determine whether to call safefree(). Hence body_size can be set
176 non-zero to record the size of HEs, without fear of bogus frees. */
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177#if defined(PERL_IN_HV_C) || defined(PERL_IN_XS_APITEST)
178#define HE_SVSLOT SVt_NULL
179#endif
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180#ifdef PERL_IN_SV_C
181# define SVt_FIRST SVt_NULL /* the type of SV that new_SV() in sv.c returns */
182#endif
43e6e717 183
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184#define PERL_ARENA_ROOTS_SIZE (SVt_LAST)
185
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186/* typedefs to eliminate some typing */
187typedef struct he HE;
188typedef struct hek HEK;
189
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190/* Using C's structural equivalence to help emulate C++ inheritance here... */
191
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192/* start with 2 sv-head building blocks */
193#define _SV_HEAD(ptrtype) \
194 ptrtype sv_any; /* pointer to body */ \
195 U32 sv_refcnt; /* how many references to us */ \
196 U32 sv_flags /* what we are */
197
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198#if NVSIZE <= IVSIZE
199# define _NV_BODYLESS_UNION NV svu_nv;
200#else
201# define _NV_BODYLESS_UNION
202#endif
203
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204#define _SV_HEAD_UNION \
205 union { \
2a12fdfc 206 char* svu_pv; /* pointer to malloced string */ \
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207 IV svu_iv; \
208 UV svu_uv; \
5b306eef 209 _NV_BODYLESS_UNION \
30153bd2 210 SV* svu_rv; /* pointer to another SV */ \
8d919b0a 211 struct regexp* svu_rx; \
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212 SV** svu_array; \
213 HE** svu_hash; \
f7877b28 214 GP* svu_gp; \
6f7e8353 215 PerlIO *svu_fp; \
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216 } sv_u \
217 _SV_HEAD_DEBUG
30153bd2 218
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219#ifdef DEBUG_LEAKING_SCALARS
220#define _SV_HEAD_DEBUG ;\
221 PERL_BITFIELD32 sv_debug_optype:9; /* the type of OP that allocated us */ \
222 PERL_BITFIELD32 sv_debug_inpad:1; /* was allocated in a pad for an OP */ \
223 PERL_BITFIELD32 sv_debug_line:16; /* the line where we were allocated */ \
224 UV sv_debug_serial; /* serial number of sv allocation */ \
225 char * sv_debug_file; /* the file where we were allocated */ \
226 SV * sv_debug_parent /* what we were cloned from (ithreads)*/
227#else
228#define _SV_HEAD_DEBUG
229#endif
30153bd2 230
5e045b90 231struct STRUCT_SV { /* struct sv { */
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232 _SV_HEAD(void*);
233 _SV_HEAD_UNION;
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234};
235
236struct gv {
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237 _SV_HEAD(XPVGV*); /* pointer to xpvgv body */
238 _SV_HEAD_UNION;
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239};
240
241struct cv {
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242 _SV_HEAD(XPVCV*); /* pointer to xpvcv body */
243 _SV_HEAD_UNION;
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244};
245
246struct av {
0f7b1ae0 247 _SV_HEAD(XPVAV*); /* pointer to xpvav body */
30153bd2 248 _SV_HEAD_UNION;
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249};
250
251struct hv {
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252 _SV_HEAD(XPVHV*); /* pointer to xpvhv body */
253 _SV_HEAD_UNION;
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254};
255
256struct io {
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257 _SV_HEAD(XPVIO*); /* pointer to xpvio body */
258 _SV_HEAD_UNION;
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259};
260
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261struct p5rx {
262 _SV_HEAD(struct regexp*); /* pointer to regexp body */
263 _SV_HEAD_UNION;
264};
265
30153bd2 266#undef _SV_HEAD
0f7b1ae0 267#undef _SV_HEAD_UNION /* ensure no pollution */
30153bd2 268
954c1994 269/*
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270=head1 SV Manipulation Functions
271
954c1994 272=for apidoc Am|U32|SvREFCNT|SV* sv
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273Returns the value of the object's reference count. Exposed
274to perl code via Internals::SvREFCNT().
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275
276=for apidoc Am|SV*|SvREFCNT_inc|SV* sv
5df2f140 277Increments the reference count of the given SV, returning the SV.
954c1994 278
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279All of the following C<SvREFCNT_inc>* macros are optimized versions of
280C<SvREFCNT_inc>, and can be replaced with C<SvREFCNT_inc>.
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281
282=for apidoc Am|SV*|SvREFCNT_inc_NN|SV* sv
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283Same as C<SvREFCNT_inc>, but can only be used if you know C<sv>
284is not C<NULL>. Since we don't have to check the NULLness, it's faster
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285and smaller.
286
f2403e57 287=for apidoc Am|void|SvREFCNT_inc_void|SV* sv
796b6530 288Same as C<SvREFCNT_inc>, but can only be used if you don't need the
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289return value. The macro doesn't need to return a meaningful value.
290
f2403e57 291=for apidoc Am|void|SvREFCNT_inc_void_NN|SV* sv
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292Same as C<SvREFCNT_inc>, but can only be used if you don't need the return
293value, and you know that C<sv> is not C<NULL>. The macro doesn't need
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294to return a meaningful value, or check for NULLness, so it's smaller
295and faster.
296
297=for apidoc Am|SV*|SvREFCNT_inc_simple|SV* sv
796b6530 298Same as C<SvREFCNT_inc>, but can only be used with expressions without side
4ea561bc 299effects. Since we don't have to store a temporary value, it's faster.
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300
301=for apidoc Am|SV*|SvREFCNT_inc_simple_NN|SV* sv
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302Same as C<SvREFCNT_inc_simple>, but can only be used if you know C<sv>
303is not C<NULL>. Since we don't have to check the NULLness, it's faster
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304and smaller.
305
f2403e57 306=for apidoc Am|void|SvREFCNT_inc_simple_void|SV* sv
796b6530 307Same as C<SvREFCNT_inc_simple>, but can only be used if you don't need the
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308return value. The macro doesn't need to return a meaningful value.
309
f2403e57 310=for apidoc Am|void|SvREFCNT_inc_simple_void_NN|SV* sv
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311Same as C<SvREFCNT_inc>, but can only be used if you don't need the return
312value, and you know that C<sv> is not C<NULL>. The macro doesn't need
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313to return a meaningful value, or check for NULLness, so it's smaller
314and faster.
b37c2d43 315
954c1994 316=for apidoc Am|void|SvREFCNT_dec|SV* sv
796b6530 317Decrements the reference count of the given SV. C<sv> may be C<NULL>.
954c1994 318
4a9a56a7 319=for apidoc Am|void|SvREFCNT_dec_NN|SV* sv
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320Same as C<SvREFCNT_dec>, but can only be used if you know C<sv>
321is not C<NULL>. Since we don't have to check the NULLness, it's faster
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322and smaller.
323
954c1994 324=for apidoc Am|svtype|SvTYPE|SV* sv
fbe13c60 325Returns the type of the SV. See C<L</svtype>>.
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326
327=for apidoc Am|void|SvUPGRADE|SV* sv|svtype type
328Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to
fbe13c60 329perform the upgrade if necessary. See C<L</svtype>>.
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330
331=cut
332*/
333
463ee0b2 334#define SvANY(sv) (sv)->sv_any
79072805 335#define SvFLAGS(sv) (sv)->sv_flags
aeea060c 336#define SvREFCNT(sv) (sv)->sv_refcnt
a863c7d1 337
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338#define SvREFCNT_inc(sv) S_SvREFCNT_inc(MUTABLE_SV(sv))
339#define SvREFCNT_inc_simple(sv) SvREFCNT_inc(sv)
340#define SvREFCNT_inc_NN(sv) S_SvREFCNT_inc_NN(MUTABLE_SV(sv))
341#define SvREFCNT_inc_void(sv) S_SvREFCNT_inc_void(MUTABLE_SV(sv))
8990e307 342
b37c2d43 343/* These guys don't need the curly blocks */
e638c624 344#define SvREFCNT_inc_simple_void(sv) STMT_START { if (sv) SvREFCNT(sv)++; } STMT_END
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345#define SvREFCNT_inc_simple_NN(sv) (++(SvREFCNT(sv)),MUTABLE_SV(sv))
346#define SvREFCNT_inc_void_NN(sv) (void)(++SvREFCNT(MUTABLE_SV(sv)))
347#define SvREFCNT_inc_simple_void_NN(sv) (void)(++SvREFCNT(MUTABLE_SV(sv)))
b37c2d43 348
75e16a44 349#define SvREFCNT_dec(sv) S_SvREFCNT_dec(aTHX_ MUTABLE_SV(sv))
4a9a56a7 350#define SvREFCNT_dec_NN(sv) S_SvREFCNT_dec_NN(aTHX_ MUTABLE_SV(sv))
a863c7d1 351
8990e307 352#define SVTYPEMASK 0xff
1fef4616 353#define SvTYPE(sv) ((svtype)((sv)->sv_flags & SVTYPEMASK))
79072805 354
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355/* Sadly there are some parts of the core that have pointers to already-freed
356 SV heads, and rely on being able to tell that they are now free. So mark
357 them all by using a consistent macro. */
7667e7f1 358#define SvIS_FREED(sv) UNLIKELY(((sv)->sv_flags == SVTYPEMASK))
0565a181 359
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360/* this is defined in this peculiar way to avoid compiler warnings.
361 * See the <20121213131428.GD1842@iabyn.com> thread in p5p */
463ea229 362#define SvUPGRADE(sv, mt) \
24e08842 363 ((void)(SvTYPE(sv) >= (mt) || (sv_upgrade(sv, mt),1)))
79072805 364
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365#define SVf_IOK 0x00000100 /* has valid public integer value */
366#define SVf_NOK 0x00000200 /* has valid public numeric value */
367#define SVf_POK 0x00000400 /* has valid public pointer value */
368#define SVf_ROK 0x00000800 /* has a valid reference pointer */
369
370#define SVp_IOK 0x00001000 /* has valid non-public integer value */
371#define SVp_NOK 0x00002000 /* has valid non-public numeric value */
372#define SVp_POK 0x00004000 /* has valid non-public pointer value */
9a70c74b 373#define SVp_SCREAM 0x00008000 /* currently unused on plain scalars */
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374#define SVphv_CLONEABLE SVp_SCREAM /* PVHV (stashes) clone its objects */
375#define SVpgv_GP SVp_SCREAM /* GV has a valid GP */
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376#define SVprv_PCS_IMPORTED SVp_SCREAM /* RV is a proxy for a constant
377 subroutine in another package. Set the
7eeb6e4e 378 GvIMPORTED_CV_on() if it needs to be
1ccdb730 379 expanded to a real GV */
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380
381/* SVf_PROTECT is what SVf_READONLY should have been: i.e. modifying
382 * this SV is completely illegal. However, SVf_READONLY (via
383 * Internals::SvREADONLY()) has come to be seen as a flag that can be
384 * temporarily set and unset by the user to indicate e.g. whether a hash
385 * is "locked". Now, Hash::Util et al only set SVf_READONLY, while core
386 * sets both (SVf_READONLY|SVf_PROTECT) to indicate both to core and user
387 * code that this SV should not be messed with.
388 */
fd01b4b7 389#define SVf_PROTECT 0x00010000 /* very read-only */
c0683843 390#define SVs_PADTMP 0x00020000 /* in use as tmp */
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391#define SVs_PADSTALE 0x00040000 /* lexical has gone out of scope;
392 only used when !PADTMP */
2c39754a 393#define SVs_TEMP 0x00080000 /* mortal (implies string is stealable) */
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394#define SVs_OBJECT 0x00100000 /* is "blessed" */
395#define SVs_GMG 0x00200000 /* has magical get method */
396#define SVs_SMG 0x00400000 /* has magical set method */
397#define SVs_RMG 0x00800000 /* has random magical methods */
398
fea3622c 399#define SVf_FAKE 0x01000000 /* 0: glob is just a copy
3f7ef1d4 400 1: SV head arena wasn't malloc()ed
e3918bb7 401 2: For PVCV, whether CvUNIQUE(cv)
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402 refers to an eval or once only
403 [CvEVAL(cv), CvSPECIAL(cv)]
0f94cb1f 404 3: HV: informally reserved by DAPM
2c39754a 405 for vtables */
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406#define SVf_OOK 0x02000000 /* has valid offset value. For a PVHV this
407 means that a hv_aux struct is present
408 after the main array */
409#define SVf_BREAK 0x04000000 /* refcnt is artificially low - used by
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410 SVs in final arena cleanup.
411 Set in S_regtry on PL_reg_curpm, so that
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412 perl_destruct will skip it.
413 Used for mark and sweep by OP_AASSIGN
414 */
3f7ef1d4 415#define SVf_READONLY 0x08000000 /* may not be modified */
8990e307 416
a0d0e21e 417
8990e307 418
5bc28da9 419
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420#define SVf_THINKFIRST (SVf_READONLY|SVf_PROTECT|SVf_ROK|SVf_FAKE \
421 |SVs_RMG|SVf_IsCOW)
5bc28da9 422
a0d0e21e 423#define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \
2e5b91de 424 SVp_IOK|SVp_NOK|SVp_POK|SVpgv_GP)
a0d0e21e 425
7a77f1af 426#define PRIVSHIFT 4 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
8990e307 427
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428/* SVf_AMAGIC means that the stash *may* have have overload methods. It's
429 * set each time a function is compiled into a stash, and is reset by the
430 * overload code when called for the first time and finds that there are
431 * no overload methods. Note that this used to be set on the object; but
432 * is now only set on stashes.
433 */
cd028baa 434#define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
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435#define SVf_IsCOW 0x10000000 /* copy on write (shared hash key if
436 SvLEN == 0) */
70bc21b7 437
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438/* Ensure this value does not clash with the GV_ADD* flags in gv.h, or the
439 CV_CKPROTO_* flags in op.c, or the padadd_* flags in pad.h: */
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440#define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded
441 This is also set on RVs whose overloaded
442 stringification is UTF-8. This might
443 only happen as a side effect of SvPV() */
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444/* PVHV */
445#define SVphv_SHAREKEYS 0x20000000 /* PVHV keys live on shared string table */
8990e307 446
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447/* PVAV could probably use 0x2000000 without conflict. I assume that PVFM can
448 be UTF-8 encoded, and PVCVs could well have UTF-8 prototypes. PVIOs haven't
449 been restructured, so sometimes get used as string buffers. */
450
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451
452/* Some private flags. */
453
e1dcbbca 454
26a32e18 455/* PVAV */
3f7ef1d4 456#define SVpav_REAL 0x40000000 /* free old entries */
26a32e18 457/* PVHV */
3f7ef1d4 458#define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
25da4f38 459
26a32e18 460/* IV, PVIV, PVNV, PVMG, PVGV and (I assume) PVLV */
3f7ef1d4 461#define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */
26a32e18 462/* PVAV */
3f7ef1d4 463#define SVpav_REIFY 0x80000000 /* can become real */
26a32e18 464/* PVHV */
3f7ef1d4 465#define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */
26a32e18 466/* RV upwards. However, SVf_ROK and SVp_IOK are exclusive */
3f7ef1d4 467#define SVprv_WEAKREF 0x80000000 /* Weak reference */
d3ce79bd 468/* pad name vars only */
810b8aa5 469
6e128786
NC
470#define _XPV_HEAD \
471 HV* xmg_stash; /* class package */ \
472 union _xmgu xmg_u; \
8de47657 473 STRLEN xpv_cur; /* length of svu_pv as a C string */ \
8d919b0a
FC
474 union { \
475 STRLEN xpvlenu_len; /* allocated size */ \
476 char * xpvlenu_pv; /* regexp string */ \
477 } xpv_len_u
478
479#define xpv_len xpv_len_u.xpvlenu_len
bb02a38f 480
20f4945e
MHM
481union _xnvu {
482 NV xnv_nv; /* numeric value, if any */
483 HV * xgv_stash;
9420b268 484 line_t xnv_lines; /* used internally by S_scan_subst() */
b4204fb6 485 bool xnv_bm_tail; /* an SvVALID (BM) SV has an implicit "\n" */
20f4945e
MHM
486};
487
488union _xivu {
489 IV xivu_iv; /* integer value */
20f4945e 490 UV xivu_uv;
20f4945e 491 HEK * xivu_namehek; /* xpvlv, xpvgv: GvNAME */
6432a58a 492 bool xivu_eval_seen; /* used internally by S_scan_subst() */
b4204fb6 493
20f4945e
MHM
494};
495
496union _xmgu {
497 MAGIC* xmg_magic; /* linked list of magicalness */
5bec93be 498 STRLEN xmg_hash_index; /* used while freeing hash entries */
9b7476d7 499};
11ca45c0 500
79072805 501struct xpv {
20f4945e 502 _XPV_HEAD;
79072805
LW
503};
504
505struct xpviv {
20f4945e
MHM
506 _XPV_HEAD;
507 union _xivu xiv_u;
79072805
LW
508};
509
311a25d9
NC
510#define xiv_iv xiv_u.xivu_iv
511
ff68c719 512struct xpvuv {
20f4945e
MHM
513 _XPV_HEAD;
514 union _xivu xuv_u;
ff68c719 515};
516
20f4945e 517#define xuv_uv xuv_u.xivu_uv
311a25d9 518
79072805 519struct xpvnv {
20f4945e
MHM
520 _XPV_HEAD;
521 union _xivu xiv_u;
6e128786 522 union _xnvu xnv_u;
79072805
LW
523};
524
3cd3be43 525/* This structure must match the beginning of struct xpvhv in hv.h. */
79072805 526struct xpvmg {
20f4945e 527 _XPV_HEAD;
6e128786
NC
528 union _xivu xiv_u;
529 union _xnvu xnv_u;
79072805
LW
530};
531
532struct xpvlv {
20f4945e 533 _XPV_HEAD;
6e128786
NC
534 union _xivu xiv_u;
535 union _xnvu xnv_u;
bbfdc870
FC
536 union {
537 STRLEN xlvu_targoff;
538 SSize_t xlvu_stargoff;
539 } xlv_targoff_u;
79072805
LW
540 STRLEN xlv_targlen;
541 SV* xlv_targ;
dd28f7bb
DM
542 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re
543 * y=alem/helem/iter t=tie T=tied HE */
1b92e694
DM
544 char xlv_flags; /* 1 = negative offset 2 = negative len
545 4 = out of range (vec) */
79072805
LW
546};
547
bbfdc870
FC
548#define xlv_targoff xlv_targoff_u.xlvu_targoff
549
d361b004
KW
550struct xpvinvlist {
551 _XPV_HEAD;
da62e549
KW
552 IV prev_index; /* caches result of previous invlist_search() */
553 STRLEN iterator; /* Stores where we are in iterating */
554 bool is_offset; /* The data structure for all inversion lists
555 begins with an element for code point U+0000.
556 If this bool is set, the actual list contains
557 that 0; otherwise, the list actually begins
558 with the following element. Thus to invert
559 the list, merely toggle this flag */
d361b004
KW
560};
561
a5c7cb08
DM
562/* This structure works in 2 ways - regular scalar, or GV with GP */
563
79072805 564struct xpvgv {
20f4945e 565 _XPV_HEAD;
6e128786
NC
566 union _xivu xiv_u;
567 union _xnvu xnv_u;
79072805
LW
568};
569
51c78f1b 570typedef U32 cv_flags_t;
77a005ab 571
20f4945e
MHM
572#define _XPVCV_COMMON \
573 HV * xcv_stash; \
574 union { \
575 OP * xcv_start; \
576 ANY xcv_xsubany; \
577 } xcv_start_u; \
578 union { \
579 OP * xcv_root; \
580 void (*xcv_xsub) (pTHX_ CV*); \
581 } xcv_root_u; \
b290562e
FC
582 union { \
583 GV * xcv_gv; \
584 HEK * xcv_hek; \
585 } xcv_gv_u; \
20f4945e 586 char * xcv_file; \
eacbb379
DD
587 union { \
588 PADLIST * xcv_padlist; \
db6e00bd 589 void * xcv_hscxt; \
eacbb379 590 } xcv_padlist_u; \
20f4945e
MHM
591 CV * xcv_outside; \
592 U32 xcv_outside_seq; /* the COP sequence (at the point of our \
593 * compilation) in the lexically enclosing \
594 * sub */ \
8de47657
FC
595 cv_flags_t xcv_flags; \
596 I32 xcv_depth /* >= 2 indicates recursive call */
8990e307 597
0d856a3a
FC
598/* This structure must match XPVCV in cv.h */
599
20f4945e
MHM
600struct xpvfm {
601 _XPV_HEAD;
20f4945e 602 _XPVCV_COMMON;
79072805
LW
603};
604
167f2c4d 605
8990e307 606struct xpvio {
20f4945e 607 _XPV_HEAD;
6e128786 608 union _xivu xiv_u;
6f7e8353
NC
609 /* ifp and ofp are normally the same, but sockets need separate streams */
610 PerlIO * xio_ofp;
c951e2ad
NC
611 /* Cray addresses everything by word boundaries (64 bits) and
612 * code and data pointers cannot be mixed (which is exactly what
613 * Perl_filter_add() tries to do with the dirp), hence the
614 * following union trick (as suggested by Gurusamy Sarathy).
615 * For further information see Geir Johansen's problem report
4fe48737 616 * titled [ID 20000612.002 (#3366)] Perl problem on Cray system
c951e2ad
NC
617 * The any pointer (known as IoANY()) will also be a good place
618 * to hang any IO disciplines to.
619 */
620 union {
621 DIR * xiou_dirp; /* for opendir, readdir, etc */
622 void * xiou_any; /* for alignment */
623 } xio_dirpu;
624 /* IV xio_lines is now in IVX $. */
625 IV xio_page; /* $% */
626 IV xio_page_len; /* $= */
627 IV xio_lines_left; /* $- */
628 char * xio_top_name; /* $^ */
629 GV * xio_top_gv; /* $^ */
630 char * xio_fmt_name; /* $~ */
631 GV * xio_fmt_gv; /* $~ */
632 char * xio_bottom_name;/* $^B */
633 GV * xio_bottom_gv; /* $^B */
634 char xio_type;
635 U8 xio_flags;
8990e307 636};
167f2c4d 637
4755096e
GS
638#define xio_dirp xio_dirpu.xiou_dirp
639#define xio_any xio_dirpu.xiou_any
8990e307 640
e0c19803
GS
641#define IOf_ARGV 1 /* this fp iterates over ARGV */
642#define IOf_START 2 /* check for null ARGV and substitute '-' */
643#define IOf_FLUSH 4 /* this fp wants a flush after write op */
644#define IOf_DIDTOP 8 /* just did top of form */
645#define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */
646#define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */
5bb89d25
NC
647#define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge)
648 Also, when this is set, SvPVX() is valid */
8990e307 649
ed6116ce
LW
650/* The following macros define implementation-independent predicates on SVs. */
651
954c1994 652/*
fbf9f983
RGS
653=for apidoc Am|U32|SvNIOK|SV* sv
654Returns a U32 value indicating whether the SV contains a number, integer or
954c1994
GS
655double.
656
fbf9f983
RGS
657=for apidoc Am|U32|SvNIOKp|SV* sv
658Returns a U32 value indicating whether the SV contains a number, integer or
fe749c9a 659double. Checks the B<private> setting. Use C<SvNIOK> instead.
954c1994
GS
660
661=for apidoc Am|void|SvNIOK_off|SV* sv
662Unsets the NV/IV status of an SV.
663
fbf9f983 664=for apidoc Am|U32|SvOK|SV* sv
72d33970 665Returns a U32 value indicating whether the value is defined. This is
c0b6140e 666only meaningful for scalars.
954c1994 667
fbf9f983
RGS
668=for apidoc Am|U32|SvIOKp|SV* sv
669Returns a U32 value indicating whether the SV contains an integer. Checks
fe749c9a 670the B<private> setting. Use C<SvIOK> instead.
954c1994 671
fbf9f983
RGS
672=for apidoc Am|U32|SvNOKp|SV* sv
673Returns a U32 value indicating whether the SV contains a double. Checks the
fe749c9a 674B<private> setting. Use C<SvNOK> instead.
954c1994 675
fbf9f983
RGS
676=for apidoc Am|U32|SvPOKp|SV* sv
677Returns a U32 value indicating whether the SV contains a character string.
fe749c9a 678Checks the B<private> setting. Use C<SvPOK> instead.
954c1994 679
fbf9f983
RGS
680=for apidoc Am|U32|SvIOK|SV* sv
681Returns a U32 value indicating whether the SV contains an integer.
954c1994
GS
682
683=for apidoc Am|void|SvIOK_on|SV* sv
684Tells an SV that it is an integer.
685
686=for apidoc Am|void|SvIOK_off|SV* sv
687Unsets the IV status of an SV.
688
689=for apidoc Am|void|SvIOK_only|SV* sv
796b6530 690Tells an SV that it is an integer and disables all other C<OK> bits.
954c1994 691
e331fc52 692=for apidoc Am|void|SvIOK_only_UV|SV* sv
796b6530 693Tells an SV that it is an unsigned integer and disables all other C<OK> bits.
e331fc52 694
12fa07df 695=for apidoc Am|bool|SvIOK_UV|SV* sv
a6ceea06
KW
696Returns a boolean indicating whether the SV contains an integer that must be
697interpreted as unsigned. A non-negative integer whose value is within the
796b6530 698range of both an IV and a UV may be be flagged as either C<SvUOK> or C<SVIOK>.
e331fc52 699
fbf9f983 700=for apidoc Am|bool|SvUOK|SV* sv
a6ceea06
KW
701Returns a boolean indicating whether the SV contains an integer that must be
702interpreted as unsigned. A non-negative integer whose value is within the
796b6530 703range of both an IV and a UV may be be flagged as either C<SvUOK> or C<SVIOK>.
28e5dec8 704
12fa07df 705=for apidoc Am|bool|SvIOK_notUV|SV* sv
d1be9408 706Returns a boolean indicating whether the SV contains a signed integer.
e331fc52 707
fbf9f983
RGS
708=for apidoc Am|U32|SvNOK|SV* sv
709Returns a U32 value indicating whether the SV contains a double.
954c1994
GS
710
711=for apidoc Am|void|SvNOK_on|SV* sv
712Tells an SV that it is a double.
713
714=for apidoc Am|void|SvNOK_off|SV* sv
715Unsets the NV status of an SV.
716
717=for apidoc Am|void|SvNOK_only|SV* sv
718Tells an SV that it is a double and disables all other OK bits.
719
fbf9f983
RGS
720=for apidoc Am|U32|SvPOK|SV* sv
721Returns a U32 value indicating whether the SV contains a character
954c1994
GS
722string.
723
724=for apidoc Am|void|SvPOK_on|SV* sv
725Tells an SV that it is a string.
726
727=for apidoc Am|void|SvPOK_off|SV* sv
728Unsets the PV status of an SV.
729
730=for apidoc Am|void|SvPOK_only|SV* sv
796b6530 731Tells an SV that it is a string and disables all other C<OK> bits.
1e54db1a 732Will also turn off the UTF-8 status.
954c1994 733
b0f01acb
JP
734=for apidoc Am|bool|SvVOK|SV* sv
735Returns a boolean indicating whether the SV contains a v-string.
736
fbf9f983 737=for apidoc Am|U32|SvOOK|SV* sv
69240efd
NC
738Returns a U32 indicating whether the pointer to the string buffer is offset.
739This hack is used internally to speed up removal of characters from the
796b6530
KW
740beginning of a C<SvPV>. When C<SvOOK> is true, then the start of the
741allocated string buffer is actually C<SvOOK_offset()> bytes before C<SvPVX>.
742This offset used to be stored in C<SvIVX>, but is now stored within the spare
69240efd 743part of the buffer.
954c1994 744
fbf9f983 745=for apidoc Am|U32|SvROK|SV* sv
954c1994
GS
746Tests if the SV is an RV.
747
748=for apidoc Am|void|SvROK_on|SV* sv
749Tells an SV that it is an RV.
750
751=for apidoc Am|void|SvROK_off|SV* sv
752Unsets the RV status of an SV.
753
754=for apidoc Am|SV*|SvRV|SV* sv
755Dereferences an RV to return the SV.
756
757=for apidoc Am|IV|SvIVX|SV* sv
645c22ef 758Returns the raw value in the SV's IV slot, without checks or conversions.
796b6530 759Only use when you are sure C<SvIOK> is true. See also C<L</SvIV>>.
954c1994
GS
760
761=for apidoc Am|UV|SvUVX|SV* sv
645c22ef 762Returns the raw value in the SV's UV slot, without checks or conversions.
796b6530 763Only use when you are sure C<SvIOK> is true. See also C<L</SvUV>>.
954c1994
GS
764
765=for apidoc Am|NV|SvNVX|SV* sv
645c22ef 766Returns the raw value in the SV's NV slot, without checks or conversions.
796b6530 767Only use when you are sure C<SvNOK> is true. See also C<L</SvNV>>.
954c1994
GS
768
769=for apidoc Am|char*|SvPVX|SV* sv
645c22ef 770Returns a pointer to the physical string in the SV. The SV must contain a
72d33970
FC
771string. Prior to 5.9.3 it is not safe
772to execute this macro unless the SV's
796b6530 773type >= C<SVt_PV>.
954c1994 774
5b36e945
FC
775This is also used to store the name of an autoloaded subroutine in an XS
776AUTOLOAD routine. See L<perlguts/Autoloading with XSUBs>.
89fc9e2a 777
954c1994 778=for apidoc Am|STRLEN|SvCUR|SV* sv
fbe13c60 779Returns the length of the string which is in the SV. See C<L</SvLEN>>.
954c1994
GS
780
781=for apidoc Am|STRLEN|SvLEN|SV* sv
659239a4 782Returns the size of the string buffer in the SV, not including any part
fbe13c60 783attributable to C<SvOOK>. See C<L</SvCUR>>.
954c1994
GS
784
785=for apidoc Am|char*|SvEND|SV* sv
f990ea3e
FC
786Returns a pointer to the spot just after the last character in
787the string which is in the SV, where there is usually a trailing
417b32ce 788C<NUL> character (even though Perl scalars do not strictly require it).
796b6530 789See C<L</SvCUR>>. Access the character as C<*(SvEND(sv))>.
954c1994 790
f990ea3e
FC
791Warning: If C<SvCUR> is equal to C<SvLEN>, then C<SvEND> points to
792unallocated memory.
793
954c1994
GS
794=for apidoc Am|HV*|SvSTASH|SV* sv
795Returns the stash of the SV.
796
672994ce 797=for apidoc Am|void|SvIV_set|SV* sv|IV val
20799e15
SP
798Set the value of the IV pointer in sv to val. It is possible to perform
799the same function of this macro with an lvalue assignment to C<SvIVX>.
800With future Perls, however, it will be more efficient to use
801C<SvIV_set> instead of the lvalue assignment to C<SvIVX>.
672994ce
SP
802
803=for apidoc Am|void|SvNV_set|SV* sv|NV val
796b6530 804Set the value of the NV pointer in C<sv> to val. See C<L</SvIV_set>>.
672994ce
SP
805
806=for apidoc Am|void|SvPV_set|SV* sv|char* val
f2979eac
DD
807This is probably not what you want to use, you probably wanted
808L</sv_usepvn_flags> or L</sv_setpvn> or L</sv_setpvs>.
235fc044 809
f2979eac 810Set the value of the PV pointer in C<sv> to the Perl allocated
fbe13c60 811C<NUL>-terminated string C<val>. See also C<L</SvIV_set>>.
f2979eac
DD
812
813Remember to free the previous PV buffer. There are many things to check.
235fc044
FC
814Beware that the existing pointer may be involved in copy-on-write or other
815mischief, so do C<SvOOK_off(sv)> and use C<sv_force_normal> or
796b6530 816C<SvPV_force> (or check the C<SvIsCOW> flag) first to make sure this
f2979eac
DD
817modification is safe. Then finally, if it is not a COW, call C<SvPV_free> to
818free the previous PV buffer.
672994ce
SP
819
820=for apidoc Am|void|SvUV_set|SV* sv|UV val
796b6530 821Set the value of the UV pointer in C<sv> to val. See C<L</SvIV_set>>.
672994ce
SP
822
823=for apidoc Am|void|SvRV_set|SV* sv|SV* val
796b6530 824Set the value of the RV pointer in C<sv> to val. See C<L</SvIV_set>>.
672994ce
SP
825
826=for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val
796b6530 827Set the value of the MAGIC pointer in C<sv> to val. See C<L</SvIV_set>>.
672994ce 828
b6f4de24 829=for apidoc Am|void|SvSTASH_set|SV* sv|HV* val
796b6530 830Set the value of the STASH pointer in C<sv> to val. See C<L</SvIV_set>>.
672994ce 831
954c1994 832=for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len
fbe13c60
KW
833Set the current length of the string which is in the SV. See C<L</SvCUR>>
834and C<SvIV_set>>.
672994ce
SP
835
836=for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len
0ff57aee 837Set the size of the string buffer for the SV. See C<L</SvLEN>>.
954c1994
GS
838
839=cut
840*/
841
79072805 842#define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
748a9306 843#define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK))
a0d0e21e 844#define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \
25da4f38 845 SVp_IOK|SVp_NOK|SVf_IVisUV))
79072805 846
c7724415
FC
847#define assert_not_ROK(sv) assert_(!SvROK(sv) || !SvRV(sv))
848#define assert_not_glob(sv) assert_(!isGV_with_GP(sv))
906ed6d6 849
3f2ee99a 850#define SvOK(sv) (SvFLAGS(sv) & SVf_OK || isREGEXP(sv))
f7877b28 851#define SvOK_off(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
dd2eae66 852 SvFLAGS(sv) &= ~(SVf_OK| \
d41ff1b8 853 SVf_IVisUV|SVf_UTF8), \
25da4f38 854 SvOOK_off(sv))
54866b45 855#define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \
dd2eae66 856 SvFLAGS(sv) &= ~(SVf_OK| \
d41ff1b8 857 SVf_UTF8), \
a0d0e21e 858 SvOOK_off(sv))
79072805 859
8990e307
LW
860#define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
861#define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK)
b326ddff 862#define SvIOKp_on(sv) (assert_not_glob(sv) \
765f542d 863 SvFLAGS(sv) |= SVp_IOK)
8990e307 864#define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK)
f7877b28 865#define SvNOKp_on(sv) (assert_not_glob(sv) SvFLAGS(sv) |= SVp_NOK)
8990e307 866#define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK)
f7877b28 867#define SvPOKp_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
906ed6d6 868 SvFLAGS(sv) |= SVp_POK)
463ee0b2 869
79072805 870#define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
b326ddff 871#define SvIOK_on(sv) (assert_not_glob(sv) \
765f542d 872 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
25da4f38 873#define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV))
0c34ef67 874#define SvIOK_only(sv) (SvOK_off(sv), \
a0d0e21e 875 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
f7877b28 876#define SvIOK_only_UV(sv) (assert_not_glob(sv) SvOK_off_exc_UV(sv), \
25da4f38 877 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK))
70401c6b 878
25da4f38
IZ
879#define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
880 == (SVf_IOK|SVf_IVisUV))
28e5dec8 881#define SvUOK(sv) SvIOK_UV(sv)
25da4f38
IZ
882#define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \
883 == SVf_IOK)
884
885#define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV)
886#define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV)
887#define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV)
79072805
LW
888
889#define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
f7877b28
NC
890#define SvNOK_on(sv) (assert_not_glob(sv) \
891 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
8990e307 892#define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK))
0c34ef67 893#define SvNOK_only(sv) (SvOK_off(sv), \
a0d0e21e 894 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
79072805 895
914184e1 896/*
fbf9f983 897=for apidoc Am|U32|SvUTF8|SV* sv
3c813ed0
KW
898Returns a U32 value indicating the UTF-8 status of an SV. If things are set-up
899properly, this indicates whether or not the SV contains UTF-8 encoded data.
796b6530 900You should use this I<after> a call to C<SvPV()> or one of its variants, in
fd142383 901case any call to string overloading updates the internal flag.
914184e1 902
119bc988
KW
903If you want to take into account the L<bytes> pragma, use C<L</DO_UTF8>>
904instead.
905
914184e1 906=for apidoc Am|void|SvUTF8_on|SV *sv
1e54db1a 907Turn on the UTF-8 status of an SV (the data is not changed, just the flag).
d5ce4a7c 908Do not use frivolously.
914184e1
JH
909
910=for apidoc Am|void|SvUTF8_off|SV *sv
3c813ed0
KW
911Unsets the UTF-8 status of an SV (the data is not changed, just the flag).
912Do not use frivolously.
914184e1
JH
913
914=for apidoc Am|void|SvPOK_only_UTF8|SV* sv
796b6530 915Tells an SV that it is a string and disables all other C<OK> bits,
1e54db1a 916and leaves the UTF-8 status as it was.
f1a1024e 917
914184e1
JH
918=cut
919 */
920
7a5fd60d
NC
921/* Ensure the return value of this macro does not clash with the GV_ADD* flags
922in gv.h: */
a7cb1f99
GS
923#define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8)
924#define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8))
925#define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8))
5bc28da9 926
79072805 927#define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
f7877b28 928#define SvPOK_on(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
906ed6d6 929 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
8990e307 930#define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK))
f7877b28 931#define SvPOK_only(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
dd2eae66 932 SvFLAGS(sv) &= ~(SVf_OK| \
d41ff1b8
GS
933 SVf_IVisUV|SVf_UTF8), \
934 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
f7877b28 935#define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) assert_not_glob(sv) \
dd2eae66 936 SvFLAGS(sv) &= ~(SVf_OK| \
d41ff1b8 937 SVf_IVisUV), \
a0d0e21e 938 SvFLAGS(sv) |= (SVf_POK|SVp_POK))
79072805 939
4f2da183 940#define SvVOK(sv) (SvMAGICAL(sv) \
b0a11fe1
RGS
941 && mg_find(sv,PERL_MAGIC_vstring))
942/* returns the vstring magic, if any */
943#define SvVSTRING_mg(sv) (SvMAGICAL(sv) \
4f2da183 944 ? mg_find(sv,PERL_MAGIC_vstring) : NULL)
b0a11fe1 945
79072805 946#define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
a4f658f7 947#define SvOOK_on(sv) (SvFLAGS(sv) |= SVf_OOK)
fa7a1e49 948#define SvOOK_off(sv) ((void)(SvOOK(sv) && (sv_backoff(sv),0)))
79072805 949
a0d0e21e
LW
950#define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE)
951#define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE)
952#define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE)
953
ed6116ce 954#define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
a0d0e21e 955#define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK)
dd2eae66 956#define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK))
79072805 957
8990e307
LW
958#define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG))
959#define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG))
960#define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG))
79072805 961
8990e307
LW
962#define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG)
963#define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG)
964#define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG)
ed6116ce 965
8990e307
LW
966#define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG)
967#define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG)
968#define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG)
ed6116ce 969
8990e307
LW
970#define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG)
971#define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG)
972#define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG)
ed6116ce 973
a1cd65be 974#define SvAMAGIC(sv) (SvROK(sv) && SvOBJECT(SvRV(sv)) && \
54c554f3 975 HvAMAGIC(SvSTASH(SvRV(sv))))
a0d0e21e 976
0adc25b0
FC
977/* To be used on the stashes themselves: */
978#define HvAMAGIC(hv) (SvFLAGS(hv) & SVf_AMAGIC)
979#define HvAMAGIC_on(hv) (SvFLAGS(hv) |= SVf_AMAGIC)
980#define HvAMAGIC_off(hv) (SvFLAGS(hv) &=~ SVf_AMAGIC)
981
4bac9ae4 982
1078c6a2 983/* "nog" means "doesn't have get magic" */
4bac9ae4
CS
984#define SvPOK_nog(sv) ((SvFLAGS(sv) & (SVf_POK|SVs_GMG)) == SVf_POK)
985#define SvIOK_nog(sv) ((SvFLAGS(sv) & (SVf_IOK|SVs_GMG)) == SVf_IOK)
986#define SvUOK_nog(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV|SVs_GMG)) == (SVf_IOK|SVf_IVisUV))
987#define SvNOK_nog(sv) ((SvFLAGS(sv) & (SVf_NOK|SVs_GMG)) == SVf_NOK)
988#define SvNIOK_nog(sv) (SvNIOK(sv) && !(SvFLAGS(sv) & SVs_GMG))
989
990#define SvPOK_nogthink(sv) ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST|SVs_GMG)) == SVf_POK)
991#define SvIOK_nogthink(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_THINKFIRST|SVs_GMG)) == SVf_IOK)
992#define SvUOK_nogthink(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV|SVf_THINKFIRST|SVs_GMG)) == (SVf_IOK|SVf_IVisUV))
993#define SvNOK_nogthink(sv) ((SvFLAGS(sv) & (SVf_NOK|SVf_THINKFIRST|SVs_GMG)) == SVf_NOK)
994#define SvNIOK_nogthink(sv) (SvNIOK(sv) && !(SvFLAGS(sv) & (SVf_THINKFIRST|SVs_GMG)))
995
996#define SvPOK_utf8_nog(sv) ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVs_GMG)) == (SVf_POK|SVf_UTF8))
997#define SvPOK_utf8_nogthink(sv) ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST|SVs_GMG)) == (SVf_POK|SVf_UTF8))
998
999#define SvPOK_byte_nog(sv) ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVs_GMG)) == SVf_POK)
1000#define SvPOK_byte_nogthink(sv) ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST|SVs_GMG)) == SVf_POK)
1001
8bb025ae
CS
1002#define SvPOK_pure_nogthink(sv) \
1003 ((SvFLAGS(sv) & (SVf_POK|SVf_IOK|SVf_NOK|SVf_ROK|SVpgv_GP|SVf_THINKFIRST|SVs_GMG)) == SVf_POK)
1004#define SvPOK_utf8_pure_nogthink(sv) \
1005 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_IOK|SVf_NOK|SVf_ROK|SVpgv_GP|SVf_THINKFIRST|SVs_GMG)) == (SVf_POK|SVf_UTF8))
1006#define SvPOK_byte_pure_nogthink(sv) \
1007 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_IOK|SVf_NOK|SVf_ROK|SVpgv_GP|SVf_THINKFIRST|SVs_GMG)) == SVf_POK)
1008
d34786ba 1009/*
458b44e7 1010=for apidoc Am|U32|SvGAMAGIC|SV* sv
d34786ba 1011
8554e7a0
FC
1012Returns true if the SV has get magic or
1013overloading. If either is true then
d34786ba 1014the scalar is active data, and has the potential to return a new value every
8554e7a0
FC
1015time it is accessed. Hence you must be careful to
1016only read it once per user logical operation and work
1017with that returned value. If neither is true then
d34786ba
NC
1018the scalar's value cannot change unless written to.
1019
1020=cut
1021*/
1022
dd2eae66 1023#define SvGAMAGIC(sv) (SvGMAGICAL(sv) || SvAMAGIC(sv))
1426bbf4 1024
9299023c 1025#define Gv_AMG(stash) \
d3c7a87b
FC
1026 (HvNAME(stash) && Gv_AMupdate(stash,FALSE) \
1027 ? 1 \
1028 : (HvAMAGIC_off(stash), 0))
a0d0e21e 1029
810b8aa5
GS
1030#define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \
1031 == (SVf_ROK|SVprv_WEAKREF))
1032#define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF))
1033#define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF))
1034
1ccdb730
NC
1035#define SvPCS_IMPORTED(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_PCS_IMPORTED)) \
1036 == (SVf_ROK|SVprv_PCS_IMPORTED))
1037#define SvPCS_IMPORTED_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_PCS_IMPORTED))
1038#define SvPCS_IMPORTED_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_PCS_IMPORTED))
1039
a11eaecb
FC
1040/*
1041=for apidoc m|U32|SvTHINKFIRST|SV *sv
1042
796b6530
KW
1043A quick flag check to see whether an C<sv> should be passed to C<sv_force_normal>
1044to be "downgraded" before C<SvIVX> or C<SvPVX> can be modified directly.
a11eaecb 1045
796b6530
KW
1046For example, if your scalar is a reference and you want to modify the C<SvIVX>
1047slot, you can't just do C<SvROK_off>, as that will leak the referent.
a11eaecb
FC
1048
1049This is used internally by various sv-modifying functions, such as
ef058b33 1050C<sv_setsv>, C<sv_setiv> and C<sv_pvn_force>.
a11eaecb
FC
1051
1052One case that this does not handle is a gv without SvFAKE set. After
1053
1054 if (SvTHINKFIRST(gv)) sv_force_normal(gv);
1055
1056it will still be a gv.
1057
796b6530
KW
1058C<SvTHINKFIRST> sometimes produces false positives. In those cases
1059C<sv_force_normal> does nothing.
a11eaecb
FC
1060
1061=cut
1062*/
1063
a0d0e21e 1064#define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
ed6116ce 1065
c0683843
FC
1066#define SVs_PADMY 0
1067#define SvPADMY(sv) !(SvFLAGS(sv) & SVs_PADTMP)
145bf8ee
FC
1068#ifndef PERL_CORE
1069# define SvPADMY_on(sv) SvPADTMP_off(sv)
1070#endif
d9d18af6 1071
c0683843
FC
1072#define SvPADTMP(sv) (SvFLAGS(sv) & (SVs_PADTMP))
1073#define SvPADSTALE(sv) (SvFLAGS(sv) & (SVs_PADSTALE))
62bb6514 1074
145bf8ee
FC
1075#define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP)
1076#define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP)
541377b1
FC
1077#define SvPADSTALE_on(sv) S_SvPADSTALE_on(MUTABLE_SV(sv))
1078#define SvPADSTALE_off(sv) S_SvPADSTALE_off(MUTABLE_SV(sv))
ed6116ce 1079
8990e307
LW
1080#define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP)
1081#define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP)
1082#define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP)
79072805 1083
8990e307
LW
1084#define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT)
1085#define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT)
1086#define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT)
79072805 1087
cb198164
YO
1088/*
1089=for apidoc Am|U32|SvREADONLY|SV* sv
1090Returns true if the argument is readonly, otherwise returns false.
1091Exposed to to perl code via Internals::SvREADONLY().
1092
1093=for apidoc Am|U32|SvREADONLY_on|SV* sv
1094Mark an object as readonly. Exactly what this means depends on the object
1095type. Exposed to perl code via Internals::SvREADONLY().
1096
1097=for apidoc Am|U32|SvREADONLY_off|SV* sv
1098Mark an object as not-readonly. Exactly what this mean depends on the
1099object type. Exposed to perl code via Internals::SvREADONLY().
1100
1101=cut
1102*/
1103
a623f893
FC
1104#define SvREADONLY(sv) (SvFLAGS(sv) & (SVf_READONLY|SVf_PROTECT))
1105#ifdef PERL_CORE
1106# define SvREADONLY_on(sv) (SvFLAGS(sv) |= (SVf_READONLY|SVf_PROTECT))
1107# define SvREADONLY_off(sv) (SvFLAGS(sv) &=~(SVf_READONLY|SVf_PROTECT))
1108#else
1109# define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY)
1110# define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY)
1111#endif
79072805 1112
180488f8 1113#define SvSCREAM(sv) ((SvFLAGS(sv) & (SVp_SCREAM|SVp_POK)) == (SVp_SCREAM|SVp_POK))
8990e307
LW
1114#define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM)
1115#define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM)
79072805 1116
74e0ddf7
NC
1117#ifndef PERL_CORE
1118# define SvCOMPILED(sv) 0
1119# define SvCOMPILED_on(sv)
1120# define SvCOMPILED_off(sv)
1121#endif
79072805 1122
85ffbbb0 1123
a5c7cb08 1124#if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
e9726144 1125# define SvTAIL(sv) ({ const SV *const _svtail = (const SV *)(sv); \
654c0d3f
RU
1126 assert(SvTYPE(_svtail) != SVt_PVAV); \
1127 assert(SvTYPE(_svtail) != SVt_PVHV); \
b4204fb6 1128 assert(!(SvFLAGS(_svtail) & (SVf_NOK|SVp_NOK))); \
a5c7cb08 1129 assert(SvVALID(_svtail)); \
b4204fb6 1130 ((XPVNV*)SvANY(_svtail))->xnv_u.xnv_bm_tail; \
85efc3a5
NC
1131 })
1132#else
b4204fb6 1133# define SvTAIL(_svtail) (((XPVNV*)SvANY(_svtail))->xnv_u.xnv_bm_tail)
85efc3a5 1134#endif
8990e307 1135
a5c7cb08
DM
1136/* Does the SV have a Boyer-Moore table attached as magic?
1137 * 'VALID' is a poor name, but is kept for historical reasons. */
1138#define SvVALID(_svvalid) ( \
4e8879f3
DM
1139 SvPOKp(_svvalid) \
1140 && SvSMAGICAL(_svvalid) \
a5c7cb08
DM
1141 && SvMAGIC(_svvalid) \
1142 && (SvMAGIC(_svvalid)->mg_type == PERL_MAGIC_bm \
1143 || mg_find(_svvalid, PERL_MAGIC_bm)) \
1144 )
1145
ed6116ce
LW
1146#define SvRVx(sv) SvRV(sv)
1147
f599b64b 1148#ifdef PERL_DEBUG_COW
8ed30cc1
DD
1149/* Need -0.0 for SvNVX to preserve IEEE FP "negative zero" because
1150 +0.0 + -0.0 => +0.0 but -0.0 + -0.0 => -0.0 */
771ba71a
NC
1151# define SvIVX(sv) (0 + ((XPVIV*) SvANY(sv))->xiv_iv)
1152# define SvUVX(sv) (0 + ((XPVUV*) SvANY(sv))->xuv_uv)
58430790 1153# define SvNVX(sv) (-0.0 + ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv)
ac09da3b 1154# define SvRV(sv) (0 + (sv)->sv_u.svu_rv)
f19a12a3 1155# define SvRV_const(sv) (0 + (sv)->sv_u.svu_rv)
c0e1089a 1156/* Don't test the core XS code yet. */
771ba71a 1157# if defined (PERL_CORE) && PERL_DEBUG_COW > 1
c7724415 1158# define SvPVX(sv) (0 + (assert_(!SvREADONLY(sv)) (sv)->sv_u.svu_pv))
771ba71a
NC
1159# else
1160# define SvPVX(sv) SvPVX_mutable(sv)
1161# endif
771ba71a
NC
1162# define SvCUR(sv) (0 + ((XPV*) SvANY(sv))->xpv_cur)
1163# define SvLEN(sv) (0 + ((XPV*) SvANY(sv))->xpv_len)
1164# define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1165
c7724415
FC
1166# define SvMAGIC(sv) (0 + *(assert_(SvTYPE(sv) >= SVt_PVMG) &((XPVMG*) SvANY(sv))->xmg_u.xmg_magic))
1167# define SvSTASH(sv) (0 + *(assert_(SvTYPE(sv) >= SVt_PVMG) &((XPVMG*) SvANY(sv))->xmg_stash))
f599b64b 1168#else
771ba71a
NC
1169# define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
1170# define SvEND(sv) ((sv)->sv_u.svu_pv + ((XPV*)SvANY(sv))->xpv_cur)
1171
05ef5f8f
NC
1172# if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
1173/* These get expanded inside other macros that already use a variable _sv */
f7877b28 1174# define SvPVX(sv) \
d2c6dc5e 1175 (*({ SV *const _svpvx = MUTABLE_SV(sv); \
f1fb8741 1176 assert(PL_valid_types_PVX[SvTYPE(_svpvx) & SVt_MASK]); \
e5ae200f 1177 assert(!isGV_with_GP(_svpvx)); \
5bb89d25
NC
1178 assert(!(SvTYPE(_svpvx) == SVt_PVIO \
1179 && !(IoFLAGS(_svpvx) & IOf_FAKE_DIRP))); \
e5ae200f 1180 &((_svpvx)->sv_u.svu_pv); \
f7877b28 1181 }))
08002bbf 1182# define SvCUR(sv) \
b1bc3f34 1183 (*({ const SV *const _svcur = (const SV *)(sv); \
8d919b0a
FC
1184 assert(PL_valid_types_PVX[SvTYPE(_svcur) & SVt_MASK] \
1185 || SvTYPE(_svcur) == SVt_REGEXP); \
e5ae200f 1186 assert(!isGV_with_GP(_svcur)); \
6f7e8353
NC
1187 assert(!(SvTYPE(_svcur) == SVt_PVIO \
1188 && !(IoFLAGS(_svcur) & IOf_FAKE_DIRP))); \
b1bc3f34 1189 &(((XPV*) MUTABLE_PTR(SvANY(_svcur)))->xpv_cur); \
08002bbf 1190 }))
05ef5f8f 1191# define SvIVX(sv) \
b1bc3f34 1192 (*({ const SV *const _svivx = (const SV *)(sv); \
f1fb8741 1193 assert(PL_valid_types_IVX[SvTYPE(_svivx) & SVt_MASK]); \
e5ae200f 1194 assert(!isGV_with_GP(_svivx)); \
b1bc3f34 1195 &(((XPVIV*) MUTABLE_PTR(SvANY(_svivx)))->xiv_iv); \
05ef5f8f
NC
1196 }))
1197# define SvUVX(sv) \
b1bc3f34 1198 (*({ const SV *const _svuvx = (const SV *)(sv); \
f1fb8741 1199 assert(PL_valid_types_IVX[SvTYPE(_svuvx) & SVt_MASK]); \
e5ae200f 1200 assert(!isGV_with_GP(_svuvx)); \
b1bc3f34 1201 &(((XPVUV*) MUTABLE_PTR(SvANY(_svuvx)))->xuv_uv); \
05ef5f8f
NC
1202 }))
1203# define SvNVX(sv) \
b1bc3f34 1204 (*({ const SV *const _svnvx = (const SV *)(sv); \
f1fb8741 1205 assert(PL_valid_types_NVX[SvTYPE(_svnvx) & SVt_MASK]); \
e5ae200f 1206 assert(!isGV_with_GP(_svnvx)); \
b1bc3f34 1207 &(((XPVNV*) MUTABLE_PTR(SvANY(_svnvx)))->xnv_u.xnv_nv); \
05ef5f8f 1208 }))
ac09da3b 1209# define SvRV(sv) \
f19a12a3 1210 (*({ SV *const _svrv = MUTABLE_SV(sv); \
f1fb8741 1211 assert(PL_valid_types_RV[SvTYPE(_svrv) & SVt_MASK]); \
e5ae200f 1212 assert(!isGV_with_GP(_svrv)); \
6f7e8353
NC
1213 assert(!(SvTYPE(_svrv) == SVt_PVIO \
1214 && !(IoFLAGS(_svrv) & IOf_FAKE_DIRP))); \
e5ae200f 1215 &((_svrv)->sv_u.svu_rv); \
ac09da3b 1216 }))
f19a12a3
MHM
1217# define SvRV_const(sv) \
1218 ({ const SV *const _svrv = (const SV *)(sv); \
f1fb8741 1219 assert(PL_valid_types_RV[SvTYPE(_svrv) & SVt_MASK]); \
f19a12a3 1220 assert(!isGV_with_GP(_svrv)); \
6f7e8353
NC
1221 assert(!(SvTYPE(_svrv) == SVt_PVIO \
1222 && !(IoFLAGS(_svrv) & IOf_FAKE_DIRP))); \
f19a12a3
MHM
1223 (_svrv)->sv_u.svu_rv; \
1224 })
05ef5f8f 1225# define SvMAGIC(sv) \
b1bc3f34 1226 (*({ const SV *const _svmagic = (const SV *)(sv); \
e5ae200f 1227 assert(SvTYPE(_svmagic) >= SVt_PVMG); \
b1bc3f34 1228 &(((XPVMG*) MUTABLE_PTR(SvANY(_svmagic)))->xmg_u.xmg_magic); \
05ef5f8f
NC
1229 }))
1230# define SvSTASH(sv) \
b1bc3f34 1231 (*({ const SV *const _svstash = (const SV *)(sv); \
e5ae200f 1232 assert(SvTYPE(_svstash) >= SVt_PVMG); \
b1bc3f34 1233 &(((XPVMG*) MUTABLE_PTR(SvANY(_svstash)))->xmg_stash); \
05ef5f8f 1234 }))
03687789 1235# else
08002bbf
NC
1236# define SvPVX(sv) ((sv)->sv_u.svu_pv)
1237# define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
05ef5f8f
NC
1238# define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
1239# define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv
58430790 1240# define SvNVX(sv) ((XPVNV*) SvANY(sv))->xnv_u.xnv_nv
ac09da3b 1241# define SvRV(sv) ((sv)->sv_u.svu_rv)
f19a12a3 1242# define SvRV_const(sv) (0 + (sv)->sv_u.svu_rv)
e736a858 1243# define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_u.xmg_magic
771ba71a 1244# define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
03687789 1245# endif
62703e72
NC
1246#endif
1247
06c0cc96 1248#ifndef PERL_POISON
bb496845
SP
1249/* Given that these two are new, there can't be any existing code using them
1250 * as LVALUEs */
06c0cc96
NC
1251# define SvPVX_mutable(sv) (0 + (sv)->sv_u.svu_pv)
1252# define SvPVX_const(sv) ((const char*)(0 + (sv)->sv_u.svu_pv))
1253#else
1254/* Except for the poison code, which uses & to scribble over the pointer after
1255 free() is called. */
1256# define SvPVX_mutable(sv) ((sv)->sv_u.svu_pv)
1257# define SvPVX_const(sv) ((const char*)((sv)->sv_u.svu_pv))
1258#endif
bb496845 1259
62703e72
NC
1260#define SvIVXx(sv) SvIVX(sv)
1261#define SvUVXx(sv) SvUVX(sv)
1262#define SvNVXx(sv) SvNVX(sv)
1263#define SvPVXx(sv) SvPVX(sv)
1264#define SvLENx(sv) SvLEN(sv)
1265#define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv))
1266
1267
28e5dec8
JH
1268/* Ask a scalar nicely to try to become an IV, if possible.
1269 Not guaranteed to stay returning void */
1270/* Macro won't actually call sv_2iv if already IOK */
1271#define SvIV_please(sv) \
3ea8bc93 1272 STMT_START {if (!SvIOKp(sv) && (SvFLAGS(sv) & (SVf_NOK|SVf_POK))) \
28e5dec8 1273 (void) SvIV(sv); } STMT_END
6f1401dc 1274#define SvIV_please_nomg(sv) \
3ea8bc93
DD
1275 (!(SvFLAGS(sv) & (SVf_IOK|SVp_IOK)) && (SvFLAGS(sv) & (SVf_NOK|SVf_POK)) \
1276 ? (sv_2iv_flags(sv, 0), SvIOK(sv)) \
8a68f328 1277 : SvIOK(sv))
79072805 1278#define SvIV_set(sv, val) \
f1fb8741
DM
1279 STMT_START { \
1280 assert(PL_valid_types_IV_set[SvTYPE(sv) & SVt_MASK]); \
08002bbf 1281 assert(!isGV_with_GP(sv)); \
b19bbeda 1282 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END
79072805 1283#define SvNV_set(sv, val) \
f1fb8741
DM
1284 STMT_START { \
1285 assert(PL_valid_types_NV_set[SvTYPE(sv) & SVt_MASK]); \
08002bbf 1286 assert(!isGV_with_GP(sv)); \
58430790 1287 (((XPVNV*)SvANY(sv))->xnv_u.xnv_nv = (val)); } STMT_END
79072805 1288#define SvPV_set(sv, val) \
f1fb8741
DM
1289 STMT_START { \
1290 assert(PL_valid_types_PVX[SvTYPE(sv) & SVt_MASK]); \
08002bbf 1291 assert(!isGV_with_GP(sv)); \
6f7e8353
NC
1292 assert(!(SvTYPE(sv) == SVt_PVIO \
1293 && !(IoFLAGS(sv) & IOf_FAKE_DIRP))); \
339049b0 1294 ((sv)->sv_u.svu_pv = (val)); } STMT_END
607fa7f2 1295#define SvUV_set(sv, val) \
f1fb8741
DM
1296 STMT_START { \
1297 assert(PL_valid_types_IV_set[SvTYPE(sv) & SVt_MASK]); \
08002bbf 1298 assert(!isGV_with_GP(sv)); \
607fa7f2 1299 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END
b162af07 1300#define SvRV_set(sv, val) \
f1fb8741
DM
1301 STMT_START { \
1302 assert(PL_valid_types_RV[SvTYPE(sv) & SVt_MASK]); \
08002bbf 1303 assert(!isGV_with_GP(sv)); \
6f7e8353
NC
1304 assert(!(SvTYPE(sv) == SVt_PVIO \
1305 && !(IoFLAGS(sv) & IOf_FAKE_DIRP))); \
339049b0 1306 ((sv)->sv_u.svu_rv = (val)); } STMT_END
b162af07
SP
1307#define SvMAGIC_set(sv, val) \
1308 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
e736a858 1309 (((XPVMG*)SvANY(sv))->xmg_u.xmg_magic = (val)); } STMT_END
b162af07
SP
1310#define SvSTASH_set(sv, val) \
1311 STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
1312 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END
79072805 1313#define SvCUR_set(sv, val) \
f1fb8741 1314 STMT_START { \
8d919b0a
FC
1315 assert(PL_valid_types_PVX[SvTYPE(sv) & SVt_MASK] \
1316 || SvTYPE(sv) == SVt_REGEXP); \
08002bbf 1317 assert(!isGV_with_GP(sv)); \
6f7e8353
NC
1318 assert(!(SvTYPE(sv) == SVt_PVIO \
1319 && !(IoFLAGS(sv) & IOf_FAKE_DIRP))); \
b162af07 1320 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END
79072805 1321#define SvLEN_set(sv, val) \
f1fb8741
DM
1322 STMT_START { \
1323 assert(PL_valid_types_PVX[SvTYPE(sv) & SVt_MASK]); \
f7877b28 1324 assert(!isGV_with_GP(sv)); \
6f7e8353
NC
1325 assert(!(SvTYPE(sv) == SVt_PVIO \
1326 && !(IoFLAGS(sv) & IOf_FAKE_DIRP))); \
b162af07 1327 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END
7ae8ee9e
NC
1328#define SvEND_set(sv, val) \
1329 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \
3ec35e0f 1330 SvCUR_set(sv, (val) - SvPVX(sv)); } STMT_END
79072805 1331
b7e9a5c2 1332#define SvPV_renew(sv,n) \
1da4ca5f
NC
1333 STMT_START { SvLEN_set(sv, n); \
1334 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \
1335 (char*)saferealloc((Malloc_t)SvPVX(sv), \
1336 (MEM_SIZE)((n))))); \
1337 } STMT_END
1338
1339#define SvPV_shrink_to_cur(sv) STMT_START { \
1340 const STRLEN _lEnGtH = SvCUR(sv) + 1; \
1341 SvPV_renew(sv, _lEnGtH); \
1342 } STMT_END
b7e9a5c2 1343
771ba71a
NC
1344#define SvPV_free(sv) \
1345 STMT_START { \
1346 assert(SvTYPE(sv) >= SVt_PV); \
1347 if (SvLEN(sv)) { \
e537ac38 1348 assert(!SvROK(sv)); \
5d9574c1 1349 if(UNLIKELY(SvOOK(sv))) { \
69240efd
NC
1350 STRLEN zok; \
1351 SvOOK_offset(sv, zok); \
1352 SvPV_set(sv, SvPVX_mutable(sv) - zok); \
771ba71a
NC
1353 SvFLAGS(sv) &= ~SVf_OOK; \
1354 } \
1355 Safefree(SvPVX(sv)); \
1356 } \
1357 } STMT_END
8bd4d4c5 1358
43230e26
NC
1359#ifdef PERL_CORE
1360/* Code that crops up in three places to take a scalar and ready it to hold
1361 a reference */
1362# define prepare_SV_for_RV(sv) \
1363 STMT_START { \
1364 if (SvTYPE(sv) < SVt_PV && SvTYPE(sv) != SVt_IV) \
1365 sv_upgrade(sv, SVt_IV); \
662f1f9e 1366 else if (SvTYPE(sv) >= SVt_PV) { \
43230e26
NC
1367 SvPV_free(sv); \
1368 SvLEN_set(sv, 0); \
1369 SvCUR_set(sv, 0); \
1370 } \
1371 } STMT_END
1372#endif
373b357f 1373
cffe132d
NC
1374#ifndef PERL_CORE
1375# define BmFLAGS(sv) (SvTAIL(sv) ? FBMcf_TAIL : 0)
1376#endif
6976cee3 1377
60c8298a 1378#if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
60c8298a 1379# define BmUSEFUL(sv) \
b1bc3f34 1380 (*({ SV *const _bmuseful = MUTABLE_SV(sv); \
408dc2ec 1381 assert(SvTYPE(_bmuseful) >= SVt_PVIV); \
e5ae200f 1382 assert(SvVALID(_bmuseful)); \
408dc2ec
NC
1383 assert(!SvIOK(_bmuseful)); \
1384 &(((XPVIV*) SvANY(_bmuseful))->xiv_u.xivu_iv); \
8eeaf79a 1385 }))
60c8298a 1386#else
50c7be83 1387# define BmUSEFUL(sv) ((XPVIV*) SvANY(sv))->xiv_u.xivu_iv
b4f6c04b 1388
60c8298a 1389#endif
79072805 1390
8922e438
FC
1391#ifndef PERL_CORE
1392# define BmRARE(sv) 0
1393# define BmPREVIOUS(sv) 0
1394#endif
1395
f2da823f 1396#define FmLINES(sv) ((XPVIV*) SvANY(sv))->xiv_iv
79072805
LW
1397
1398#define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
1399#define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
1400#define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
bbfdc870 1401#define LvSTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff_u.xlvu_stargoff
79072805 1402#define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
83f78d1a 1403#define LvFLAGS(sv) ((XPVLV*) SvANY(sv))->xlv_flags
79072805 1404
6f7e8353 1405#define IoIFP(sv) (sv)->sv_u.svu_fp
8990e307
LW
1406#define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp
1407#define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp
4755096e 1408#define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any
c490b21c 1409#define IoLINES(sv) ((XPVIO*) SvANY(sv))->xiv_u.xivu_iv
8990e307
LW
1410#define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page
1411#define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len
1412#define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left
1413#define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name
1414#define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv
1415#define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name
1416#define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv
1417#define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name
1418#define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv
8990e307
LW
1419#define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type
1420#define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags
1421
50952442 1422/* IoTYPE(sv) is a single character telling the type of I/O connection. */
3b6c1aba
JH
1423#define IoTYPE_RDONLY '<'
1424#define IoTYPE_WRONLY '>'
1425#define IoTYPE_RDWR '+'
1426#define IoTYPE_APPEND 'a'
1427#define IoTYPE_PIPE '|'
1428#define IoTYPE_STD '-' /* stdin or stdout */
1429#define IoTYPE_SOCKET 's'
1430#define IoTYPE_CLOSED ' '
1431#define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */
1432#define IoTYPE_NUMERIC '#' /* fdopen */
03fcf2fc
GS
1433
1434/*
954c1994 1435=for apidoc Am|bool|SvTAINTED|SV* sv
8554e7a0 1436Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if
954c1994
GS
1437not.
1438
1439=for apidoc Am|void|SvTAINTED_on|SV* sv
c55831ac 1440Marks an SV as tainted if tainting is enabled.
954c1994
GS
1441
1442=for apidoc Am|void|SvTAINTED_off|SV* sv
8554e7a0
FC
1443Untaints an SV. Be I<very> careful with this routine, as it short-circuits
1444some of Perl's fundamental security features. XS module authors should not
954c1994 1445use this function unless they fully understand all the implications of
72d33970 1446unconditionally untainting the value. Untainting should be done in the
954c1994
GS
1447standard perl fashion, via a carefully crafted regexp, rather than directly
1448untainting variables.
1449
1450=for apidoc Am|void|SvTAINT|SV* sv
c98cdb04
FC
1451Taints an SV if tainting is enabled, and if some input to the current
1452expression is tainted--usually a variable, but possibly also implicit
1453inputs such as locale settings. C<SvTAINT> propagates that taintedness to
1454the outputs of an expression in a pessimistic fashion; i.e., without paying
1455attention to precisely which outputs are influenced by which inputs.
954c1994
GS
1456
1457=cut
1458*/
1459
a0714e2c 1460#define sv_taint(sv) sv_magic((sv), NULL, PERL_MAGIC_taint, NULL, 0)
aae9cea0 1461
dc6d7f5c 1462#ifdef NO_TAINT_SUPPORT
284167a5
S
1463# define SvTAINTED(sv) 0
1464#else
1465# define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv))
1466#endif
5d9574c1
DM
1467#define SvTAINTED_on(sv) STMT_START{ if(UNLIKELY(TAINTING_get)){sv_taint(sv);} }STMT_END
1468#define SvTAINTED_off(sv) STMT_START{ if(UNLIKELY(TAINTING_get)){sv_untaint(sv);} }STMT_END
bbce6d69 1469
c6ee37c5
MB
1470#define SvTAINT(sv) \
1471 STMT_START { \
d48c660d
DM
1472 assert(TAINTING_get || !TAINT_get); \
1473 if (UNLIKELY(TAINT_get)) \
1474 SvTAINTED_on(sv); \
c6ee37c5 1475 } STMT_END
79072805 1476
954c1994
GS
1477/*
1478=for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len
8bb025ae 1479Like C<SvPV> but will force the SV into containing a string (C<SvPOK>), and
fd142383 1480only a string (C<SvPOK_only>), by hook or by crook. You need force if you are
8bb025ae 1481going to update the C<SvPVX> directly. Processes get magic.
954c1994 1482
fd142383 1483Note that coercing an arbitrary scalar into a plain PV will potentially
72d33970 1484strip useful data from it. For example if the SV was C<SvROK>, then the
fd142383
DM
1485referent will have its reference count decremented, and the SV itself may
1486be converted to an C<SvPOK> scalar with a string buffer containing a value
1487such as C<"ARRAY(0x1234)">.
1488
645c22ef 1489=for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len
fd142383 1490Like C<SvPV_force>, but doesn't process get magic.
645c22ef 1491
954c1994 1492=for apidoc Am|char*|SvPV|SV* sv|STRLEN len
5f08bad4
ST
1493Returns a pointer to the string in the SV, or a stringified form of
1494the SV if the SV does not contain a string. The SV may cache the
cfe3322a
DG
1495stringified version becoming C<SvPOK>. Handles 'get' magic. The
1496C<len> variable will be set to the length of the string (this is a macro, so
fbe13c60 1497don't use C<&len>). See also C<L</SvPVx>> for a version which guarantees to
796b6530 1498evaluate C<sv> only once.
645c22ef 1499
fd142383 1500Note that there is no guarantee that the return value of C<SvPV()> is
fe02ddb7 1501equal to C<SvPVX(sv)>, or that C<SvPVX(sv)> contains valid data, or that
c07def6d 1502successive calls to C<SvPV(sv)> will return the same pointer value each
72d33970 1503time. This is due to the way that things like overloading and
fe02ddb7 1504Copy-On-Write are handled. In these cases, the return value may point to
796b6530 1505a temporary buffer or similar. If you absolutely need the C<SvPVX> field to
fe02ddb7 1506be valid (for example, if you intend to write to it), then see
fbe13c60 1507C<L</SvPV_force>>.
fd142383 1508
645c22ef 1509=for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
4ea561bc
NC
1510A version of C<SvPV> which guarantees to evaluate C<sv> only once.
1511Only use this if C<sv> is an expression with side effects, otherwise use the
b3adf4c0 1512more efficient C<SvPV>.
954c1994 1513
891f9566
YST
1514=for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
1515Like C<SvPV> but doesn't process magic.
1516
954c1994 1517=for apidoc Am|char*|SvPV_nolen|SV* sv
fd142383 1518Like C<SvPV> but doesn't set a length variable.
954c1994 1519
71eb6d8c
TC
1520=for apidoc Am|char*|SvPV_nomg_nolen|SV* sv
1521Like C<SvPV_nolen> but doesn't process magic.
1522
954c1994 1523=for apidoc Am|IV|SvIV|SV* sv
04e8f319
P
1524Coerces the given SV to IV and returns it. The returned value in many
1525circumstances will get stored in C<sv>'s IV slot, but not in all cases. (Use
1526C<L</sv_setiv>> to make sure it does).
1527
1528See C<L</SvIVx>> for a version which guarantees to evaluate C<sv> only once.
645c22ef 1529
891f9566
YST
1530=for apidoc Am|IV|SvIV_nomg|SV* sv
1531Like C<SvIV> but doesn't process magic.
1532
645c22ef 1533=for apidoc Am|IV|SvIVx|SV* sv
04e8f319
P
1534Coerces the given SV to IV and returns it. The returned value in many
1535circumstances will get stored in C<sv>'s IV slot, but not in all cases. (Use
1536C<L</sv_setiv>> to make sure it does).
1537
1538This form guarantees to evaluate C<sv> only once. Only use this if C<sv> is an
1539expression with side effects, otherwise use the more efficient C<SvIV>.
954c1994
GS
1540
1541=for apidoc Am|NV|SvNV|SV* sv
04e8f319
P
1542Coerces the given SV to NV and returns it. The returned value in many
1543circumstances will get stored in C<sv>'s NV slot, but not in all cases. (Use
1544C<L</sv_setnv>> to make sure it does).
1545
1546See C<L</SvNVx>> for a version which guarantees to evaluate C<sv> only once.
645c22ef 1547
6f1401dc
DM
1548=for apidoc Am|NV|SvNV_nomg|SV* sv
1549Like C<SvNV> but doesn't process magic.
1550
645c22ef 1551=for apidoc Am|NV|SvNVx|SV* sv
04e8f319
P
1552Coerces the given SV to NV and returns it. The returned value in many
1553circumstances will get stored in C<sv>'s NV slot, but not in all cases. (Use
1554C<L</sv_setnv>> to make sure it does).
1555
1556This form guarantees to evaluate C<sv> only once. Only use this if C<sv> is an
1557expression with side effects, otherwise use the more efficient C<SvNV>.
954c1994
GS
1558
1559=for apidoc Am|UV|SvUV|SV* sv
04e8f319
P
1560Coerces the given SV to UV and returns it. The returned value in many
1561circumstances will get stored in C<sv>'s UV slot, but not in all cases. (Use
1562C<L</sv_setuv>> to make sure it does).
1563
1564See C<L</SvUVx>> for a version which guarantees to evaluate C<sv> only once.
645c22ef 1565
891f9566
YST
1566=for apidoc Am|UV|SvUV_nomg|SV* sv
1567Like C<SvUV> but doesn't process magic.
1568
645c22ef 1569=for apidoc Am|UV|SvUVx|SV* sv
04e8f319
P
1570Coerces the given SV to UV and returns it. The returned value in many
1571circumstances will get stored in C<sv>'s UV slot, but not in all cases. (Use
1572C<L</sv_setuv>> to make sure it does).
1573
1574This form guarantees to evaluate C<sv> only once. Only use this if C<sv> is an
1575expression with side effects, otherwise use the more efficient C<SvUV>.
954c1994
GS
1576
1577=for apidoc Am|bool|SvTRUE|SV* sv
1578Returns a boolean indicating whether Perl would evaluate the SV as true or
796b6530
KW
1579false. See C<L</SvOK>> for a defined/undefined test. Handles 'get' magic
1580unless the scalar is already C<SvPOK>, C<SvIOK> or C<SvNOK> (the public, not the
06c841cf
FC
1581private flags).
1582
1583=for apidoc Am|bool|SvTRUE_nomg|SV* sv
1584Returns a boolean indicating whether Perl would evaluate the SV as true or
796b6530 1585false. See C<L</SvOK>> for a defined/undefined test. Does not handle 'get' magic.
954c1994 1586
645c22ef 1587=for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len
4a4088c4 1588Like C<SvPV_force>, but converts C<sv> to UTF-8 first if necessary.
645c22ef
DM
1589
1590=for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len
4a4088c4 1591Like C<SvPV>, but converts C<sv> to UTF-8 first if necessary.
645c22ef 1592
b70b15d2 1593=for apidoc Am|char*|SvPVutf8_nolen|SV* sv
4a4088c4 1594Like C<SvPV_nolen>, but converts C<sv> to UTF-8 first if necessary.
645c22ef
DM
1595
1596=for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len
796b6530 1597Like C<SvPV_force>, but converts C<sv> to byte representation first if necessary.
645c22ef
DM
1598
1599=for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len
796b6530 1600Like C<SvPV>, but converts C<sv> to byte representation first if necessary.
645c22ef 1601
b70b15d2 1602=for apidoc Am|char*|SvPVbyte_nolen|SV* sv
796b6530 1603Like C<SvPV_nolen>, but converts C<sv> to byte representation first if necessary.
645c22ef
DM
1604
1605=for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len
4a4088c4 1606Like C<SvPV_force>, but converts C<sv> to UTF-8 first if necessary.
796b6530 1607Guarantees to evaluate C<sv> only once; use the more efficient C<SvPVutf8_force>
645c22ef
DM
1608otherwise.
1609
1610=for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len
4a4088c4 1611Like C<SvPV>, but converts C<sv> to UTF-8 first if necessary.
796b6530 1612Guarantees to evaluate C<sv> only once; use the more efficient C<SvPVutf8>
645c22ef
DM
1613otherwise.
1614
1615=for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len
796b6530
KW
1616Like C<SvPV_force>, but converts C<sv> to byte representation first if necessary.
1617Guarantees to evaluate C<sv> only once; use the more efficient C<SvPVbyte_force>
645c22ef
DM
1618otherwise.
1619
1620=for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len
796b6530
KW
1621Like C<SvPV>, but converts C<sv> to byte representation first if necessary.
1622Guarantees to evaluate C<sv> only once; use the more efficient C<SvPVbyte>
645c22ef
DM
1623otherwise.
1624
df8dcb28
DD
1625=for apidoc Am|U32|SvIsCOW|SV* sv
1626Returns a U32 value indicating whether the SV is Copy-On-Write (either shared
19dbb8f1 1627hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for
8554e7a0 1628COW).
19dbb8f1
NC
1629
1630=for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv
1631Returns a boolean indicating whether the SV is Copy-On-Write shared hash key
1632scalar.
645c22ef 1633
0f76ff59
MHM
1634=for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len
1635Like C<sv_catpvn> but doesn't process magic.
1636
9dcc53ea
Z
1637=for apidoc Am|void|sv_catpv_nomg|SV* sv|const char* ptr
1638Like C<sv_catpv> but doesn't process magic.
1639
0f76ff59
MHM
1640=for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv
1641Like C<sv_setsv> but doesn't process magic.
1642
1643=for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv
1644Like C<sv_catsv> but doesn't process magic.
1645
dc960812
SP
1646=for apidoc Amdb|STRLEN|sv_utf8_upgrade_nomg|NN SV *sv
1647
796b6530 1648Like C<sv_utf8_upgrade>, but doesn't do magic on C<sv>.
dc960812 1649
954c1994
GS
1650=cut
1651*/
1652
25da4f38 1653/* Let us hope that bitmaps for UV and IV are the same */
4bac9ae4
CS
1654#define SvIV(sv) (SvIOK_nog(sv) ? SvIVX(sv) : sv_2iv(sv))
1655#define SvUV(sv) (SvUOK_nog(sv) ? SvUVX(sv) : sv_2uv(sv))
1656#define SvNV(sv) (SvNOK_nog(sv) ? SvNVX(sv) : sv_2nv(sv))
79072805 1657
891f9566
YST
1658#define SvIV_nomg(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv_flags(sv, 0))
1659#define SvUV_nomg(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv_flags(sv, 0))
6f1401dc 1660#define SvNV_nomg(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv_flags(sv, 0))
891f9566 1661
baca2b92 1662/* ----*/
8d6d96c1 1663
4bac9ae4
CS
1664#define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC)
1665#define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC)
44d22300 1666#define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC)
8d6d96c1 1667
8d6d96c1 1668#define SvPV_flags(sv, lp, flags) \
4bac9ae4 1669 (SvPOK_nog(sv) \
8d6d96c1 1670 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags))
32a5c6ec 1671#define SvPV_flags_const(sv, lp, flags) \
4bac9ae4 1672 (SvPOK_nog(sv) \
32a5c6ec 1673 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \
c77ed9ca 1674 (const char*) sv_2pv_flags(sv, &lp, (flags|SV_CONST_RETURN)))
2596d9fe 1675#define SvPV_flags_const_nolen(sv, flags) \
4bac9ae4 1676 (SvPOK_nog(sv) \
2596d9fe 1677 ? SvPVX_const(sv) : \
c77ed9ca 1678 (const char*) sv_2pv_flags(sv, 0, (flags|SV_CONST_RETURN)))
44d22300 1679#define SvPV_flags_mutable(sv, lp, flags) \
4bac9ae4 1680 (SvPOK_nog(sv) \
44d22300 1681 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \
c77ed9ca 1682 sv_2pv_flags(sv, &lp, (flags|SV_MUTABLE_RETURN)))
79072805 1683
8d6d96c1 1684#define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC)
13c5b33c 1685#define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC)
32a5c6ec 1686#define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC)
baca2b92 1687
8d6d96c1 1688#define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0)
2596d9fe 1689#define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0)
8d6d96c1 1690
8d6d96c1 1691#define SvPV_force_flags(sv, lp, flags) \
8bb025ae 1692 (SvPOK_pure_nogthink(sv) \
4bac9ae4
CS
1693 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags))
1694
13c5b33c 1695#define SvPV_force_flags_nolen(sv, flags) \
8bb025ae 1696 (SvPOK_pure_nogthink(sv) \
4bac9ae4
CS
1697 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags))
1698
32a5c6ec 1699#define SvPV_force_flags_mutable(sv, lp, flags) \
8bb025ae 1700 (SvPOK_pure_nogthink(sv) \
4bac9ae4 1701 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \
32a5c6ec 1702 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN))
a0d0e21e 1703
1fa8b10d 1704#define SvPV_nolen(sv) \
4bac9ae4 1705 (SvPOK_nog(sv) \
dafda6d1 1706 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC))
70401c6b 1707
0334097d 1708/* "_nomg" in these defines means no mg_get() */
71eb6d8c 1709#define SvPV_nomg_nolen(sv) \
4bac9ae4 1710 (SvPOK_nog(sv) \
71eb6d8c
TC
1711 ? SvPVX(sv) : sv_2pv_flags(sv, 0, 0))
1712
9ce348e8 1713#define SvPV_nolen_const(sv) \
4bac9ae4 1714 (SvPOK_nog(sv) \
9ce348e8
NC
1715 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN))
1716
baca2b92 1717#define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0)
9ce348e8 1718#define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0)
2596d9fe 1719#define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0)
5bc28da9 1720
baca2b92 1721/* ----*/
70401c6b 1722
5bc28da9 1723#define SvPVutf8(sv, lp) \
4bac9ae4 1724 (SvPOK_utf8_nog(sv) \
5bc28da9 1725 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp))
70401c6b 1726
5bc28da9 1727#define SvPVutf8_force(sv, lp) \
8bb025ae 1728 (SvPOK_utf8_pure_nogthink(sv) \
5bc28da9
NIS
1729 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp))
1730
5bc28da9 1731#define SvPVutf8_nolen(sv) \
4bac9ae4 1732 (SvPOK_utf8_nog(sv) \
dafda6d1 1733 ? SvPVX(sv) : sv_2pvutf8(sv, 0))
70401c6b 1734
baca2b92
DM
1735/* ----*/
1736
5bc28da9 1737#define SvPVbyte(sv, lp) \
4bac9ae4 1738 (SvPOK_byte_nog(sv) \
5bc28da9 1739 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp))
70401c6b 1740
5bc28da9 1741#define SvPVbyte_force(sv, lp) \
8bb025ae 1742 (SvPOK_byte_pure_nogthink(sv) \
a7ec4e2e 1743 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp))
5bc28da9 1744
5bc28da9 1745#define SvPVbyte_nolen(sv) \
4bac9ae4 1746 (SvPOK_byte_nog(sv) \
dafda6d1 1747 ? SvPVX(sv) : sv_2pvbyte(sv, 0))
70401c6b 1748
baca2b92
DM
1749
1750/* define FOOx(): idempotent versions of FOO(). If possible, use a local
1751 * var to evaluate the arg once; failing that, use a global if possible;
1752 * failing that, call a function to do the work
1753 */
1754
1755#define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp)
1756#define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp)
1757#define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp)
1758
5d9574c1
DM
1759#define SvTRUE(sv) (LIKELY(sv) && (UNLIKELY(SvGMAGICAL(sv)) ? sv_2bool(sv) : SvTRUE_common(sv, sv_2bool_nomg(sv))))
1760#define SvTRUE_nomg(sv) (LIKELY(sv) && ( SvTRUE_common(sv, sv_2bool_nomg(sv))))
1761#define SvTRUE_NN(sv) (UNLIKELY(SvGMAGICAL(sv)) ? sv_2bool(sv) : SvTRUE_common(sv, sv_2bool_nomg(sv)))
716ae3b0 1762#define SvTRUE_nomg_NN(sv) ( SvTRUE_common(sv, sv_2bool_nomg(sv)))
4bac9ae4
CS
1763#define SvTRUE_common(sv,fallback) ( \
1764 !SvOK(sv) \
1765 ? 0 \
762dbf22
FC
1766 : SvPOK(sv) \
1767 ? SvPVXtrue(sv) \
1768 : (SvFLAGS(sv) & (SVf_IOK|SVf_NOK)) \
1769 ? ( (SvIOK(sv) && SvIVX(sv) != 0) \
659c4b96 1770 || (SvNOK(sv) && SvNVX(sv) != 0.0)) \
4bac9ae4
CS
1771 : (fallback))
1772
5dc8bdac 1773#if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
baca2b92 1774
b1bc3f34
NC
1775# define SvIVx(sv) ({SV *_sv = MUTABLE_SV(sv); SvIV(_sv); })
1776# define SvUVx(sv) ({SV *_sv = MUTABLE_SV(sv); SvUV(_sv); })
1777# define SvNVx(sv) ({SV *_sv = MUTABLE_SV(sv); SvNV(_sv); })
3de3296f 1778# define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); })
32a5c6ec 1779# define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); })
002e4c74 1780# define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); })
9ce348e8 1781# define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
3de3296f
AE
1782# define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); })
1783# define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); })
002e4c74 1784# define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); })
4bac9ae4
CS
1785# define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); })
1786# define SvTRUEx_nomg(sv) ({SV *_sv = (sv); SvTRUE_nomg(_sv); })
baca2b92 1787
a80f87c4 1788#else /* __GNUC__ */
baca2b92 1789
a80f87c4
GS
1790/* These inlined macros use globals, which will require a thread
1791 * declaration in user code, so we avoid them under threads */
1792
3db8f154
MB
1793# define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv))
1794# define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv))
1795# define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv))
1796# define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp))
32a5c6ec 1797# define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp))
002e4c74 1798# define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv))
5f1478c3 1799# define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv))
3db8f154
MB
1800# define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp))
1801# define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp))
002e4c74 1802# define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv))
4bac9ae4
CS
1803# define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv))
1804# define SvTRUEx_nomg(sv) ((PL_Sv = (sv)), SvTRUE_nomg(PL_Sv))
baca2b92
DM
1805#endif /* __GNU__ */
1806
630b72b0
DD
1807#define SvPVXtrue(sv) ( \
1808 ((XPV*)SvANY((sv))) \
1809 && ( \
1810 ((XPV*)SvANY((sv)))->xpv_cur > 1 \
1811 || ( \
1812 ((XPV*)SvANY((sv)))->xpv_cur \
1813 && *(sv)->sv_u.svu_pv != '0' \
1814 ) \
1815 ) \
1816)
1817
e3918bb7
FC
1818#define SvIsCOW(sv) (SvFLAGS(sv) & SVf_IsCOW)
1819#define SvIsCOW_on(sv) (SvFLAGS(sv) |= SVf_IsCOW)
1820#define SvIsCOW_off(sv) (SvFLAGS(sv) &= ~SVf_IsCOW)
46187eeb 1821#define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0)
baca2b92 1822
bdd68bc3
NC
1823#define SvSHARED_HEK_FROM_PV(pvx) \
1824 ((struct hek*)(pvx - STRUCT_OFFSET(struct hek, hek_key)))
0a356b31 1825#define SvSHARED_HASH(sv) (0 + SvSHARED_HEK_FROM_PV(SvPVX_const(sv))->hek_hash)
c158a4fd 1826
baca2b92 1827/* flag values for sv_*_flags functions */
5dfbfbd5 1828#define SV_UTF8_NO_ENCODING 0 /* No longer used */
baca2b92
DM
1829#define SV_IMMEDIATE_UNREF 1
1830#define SV_GMAGIC 2
765f542d 1831#define SV_COW_DROP_PV 4
5fcdf167 1832#define SV_NOSTEAL 16
32a5c6ec
NC
1833#define SV_CONST_RETURN 32
1834#define SV_MUTABLE_RETURN 64
bddd5118 1835#define SV_SMAGIC 128
c1c21316 1836#define SV_HAS_TRAILING_NUL 256
34482cd6 1837#define SV_COW_SHARED_HASH_KEYS 512
cb23d5b1 1838/* This one is only enabled for PERL_OLD_COPY_ON_WRITE */
b7adcee4
FC
1839/* XXX This flag actually enabled for any COW. But it appears not to do
1840 anything. Can we just remove it? Or will it serve some future
1841 purpose. */
cb23d5b1 1842#define SV_COW_OTHER_PVS 1024
9f621bb0
NC
1843/* Make sv_2pv_flags return NULL if something is undefined. */
1844#define SV_UNDEF_RETURNS_NULL 2048
b3ab6785
KW
1845/* Tell sv_utf8_upgrade() to not check to see if an upgrade is really needed.
1846 * This is used when the caller has already determined it is, and avoids
1847 * redundant work */
1848#define SV_FORCE_UTF8_UPGRADE 4096
aee036bb
DM
1849/* if (after resolving magic etc), the SV is found to be overloaded,
1850 * don't call the overload magic, just return as-is */
1851#define SV_SKIP_OVERLOAD 8192
20c88bf7
FC
1852#define SV_CATBYTES 16384
1853#define SV_CATUTF8 32768
34482cd6
NC
1854
1855/* The core is safe for this COW optimisation. XS code on CPAN may not be.
1856 So only default to doing the COW setup if we're in the core.
1857 */
1858#ifdef PERL_CORE
1859# ifndef SV_DO_COW_SVSETSV
cb23d5b1 1860# define SV_DO_COW_SVSETSV SV_COW_SHARED_HASH_KEYS|SV_COW_OTHER_PVS
34482cd6
NC
1861# endif
1862#endif
1863
1864#ifndef SV_DO_COW_SVSETSV
1865# define SV_DO_COW_SVSETSV 0
1866#endif
1867
765f542d 1868
5abc721d
NC
1869#define sv_unref(sv) sv_unref_flags(sv, 0)
1870#define sv_force_normal(sv) sv_force_normal_flags(sv, 0)
47518d95
NC
1871#define sv_usepvn(sv, p, l) sv_usepvn_flags(sv, p, l, 0)
1872#define sv_usepvn_mg(sv, p, l) sv_usepvn_flags(sv, p, l, SV_SMAGIC)
174c73e3 1873
46187eeb
NC
1874/* We are about to replace the SV's current value. So if it's copy on write
1875 we need to normalise it. Use the SV_COW_DROP_PV flag hint to say that
1876 the value is about to get thrown away, so drop the PV rather than go to
1877 the effort of making a read-write copy only for it to get immediately
1878 discarded. */
765f542d
NC
1879
1880#define SV_CHECK_THINKFIRST_COW_DROP(sv) if (SvTHINKFIRST(sv)) \
1881 sv_force_normal_flags(sv, SV_COW_DROP_PV)
46187eeb 1882
93c10d60 1883#ifdef PERL_COPY_ON_WRITE
db2c6cb3
FC
1884# define SvCANCOW(sv) \
1885 (SvIsCOW(sv) \
1886 ? SvLEN(sv) ? CowREFCNT(sv) != SV_COW_REFCNT_MAX : 1 \
1887 : (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS \
1888 && SvCUR(sv)+1 < SvLEN(sv))
1889 /* Note: To allow 256 COW "copies", a refcnt of 0 means 1. */
1890# define CowREFCNT(sv) (*(U8 *)(SvPVX(sv)+SvLEN(sv)-1))
1891# define SV_COW_REFCNT_MAX ((1 << sizeof(U8)*8) - 1)
f7a8268c 1892# define CAN_COW_MASK (SVf_POK|SVf_ROK|SVp_POK|SVf_FAKE| \
a623f893 1893 SVf_OOK|SVf_BREAK|SVf_READONLY|SVf_PROTECT)
b7adcee4 1894#endif
ed252734 1895
ed252734
NC
1896#define CAN_COW_FLAGS (SVp_POK|SVf_POK)
1897
765f542d
NC
1898#define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) \
1899 sv_force_normal_flags(sv, 0)
1900
1901
baca2b92
DM
1902/* all these 'functions' are now just macros */
1903
1904#define sv_pv(sv) SvPV_nolen(sv)
1905#define sv_pvutf8(sv) SvPVutf8_nolen(sv)
1906#define sv_pvbyte(sv) SvPVbyte_nolen(sv)
1907
1908#define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0)
b3ab6785 1909#define sv_utf8_upgrade_flags(sv, flags) sv_utf8_upgrade_flags_grow(sv, flags, 0)
baca2b92
DM
1910#define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0)
1911#define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0)
9dcc53ea 1912#define sv_catpv_nomg(dsv, sstr) sv_catpv_flags(dsv, sstr, 0)
34482cd6
NC
1913#define sv_setsv(dsv, ssv) \
1914 sv_setsv_flags(dsv, ssv, SV_GMAGIC|SV_DO_COW_SVSETSV)
1915#define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_DO_COW_SVSETSV)
baca2b92
DM
1916#define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC)
1917#define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0)
b347df82 1918#define sv_catsv_mg(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC|SV_SMAGIC)
baca2b92 1919#define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC)
4bac9ae4
CS
1920#define sv_catpvn_mg(sv, sstr, slen) sv_catpvn_flags(sv, sstr, slen, SV_GMAGIC|SV_SMAGIC);
1921#define sv_copypv(dsv, ssv) sv_copypv_flags(dsv, ssv, SV_GMAGIC)
1922#define sv_copypv_nomg(dsv, ssv) sv_copypv_flags(dsv, ssv, 0)
baca2b92 1923#define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC)
cb2f1b7b
NC
1924#define sv_2pv_nolen(sv) sv_2pv(sv, 0)
1925#define sv_2pvbyte_nolen(sv) sv_2pvbyte(sv, 0)
1926#define sv_2pvutf8_nolen(sv) sv_2pvutf8(sv, 0)
baca2b92
DM
1927#define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0)
1928#define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC)
1929#define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC)
891f9566
YST
1930#define sv_2iv(sv) sv_2iv_flags(sv, SV_GMAGIC)
1931#define sv_2uv(sv) sv_2uv_flags(sv, SV_GMAGIC)
39d5de13 1932#define sv_2nv(sv) sv_2nv_flags(sv, SV_GMAGIC)
078504b2 1933#define sv_eq(sv1, sv2) sv_eq_flags(sv1, sv2, SV_GMAGIC)
e8c9c9d4
NC
1934#define sv_cmp(sv1, sv2) sv_cmp_flags(sv1, sv2, SV_GMAGIC)
1935#define sv_cmp_locale(sv1, sv2) sv_cmp_locale_flags(sv1, sv2, SV_GMAGIC)
078504b2 1936#define sv_collxfrm(sv, nxp) sv_cmp_flags(sv, nxp, SV_GMAGIC)
06c841cf 1937#define sv_2bool(sv) sv_2bool_flags(sv, SV_GMAGIC)
4bac9ae4 1938#define sv_2bool_nomg(sv) sv_2bool_flags(sv, 0)
84335ee9
NC
1939#define sv_insert(bigstr, offset, len, little, littlelen) \
1940 Perl_sv_insert_flags(aTHX_ (bigstr),(offset), (len), (little), \
1941 (littlelen), SV_GMAGIC)
108cb980
FC
1942#define sv_mortalcopy(sv) \
1943 Perl_sv_mortalcopy_flags(aTHX_ sv, SV_GMAGIC|SV_DO_COW_SVSETSV)
f34d8cdd
FC
1944#define sv_cathek(sv,hek) \
1945 STMT_START { \
1946 HEK * const bmxk = hek; \
1947 sv_catpvn_flags(sv, HEK_KEY(bmxk), HEK_LEN(bmxk), \
1948 HEK_UTF8(bmxk) ? SV_CATUTF8 : SV_CATBYTES); \
1949 } STMT_END
baca2b92 1950
db79b45b 1951/* Should be named SvCatPVN_utf8_upgrade? */
4bac9ae4 1952#define sv_catpvn_nomg_utf8_upgrade(dsv, sstr, slen, nsv) \
db79b45b
JH
1953 STMT_START { \
1954 if (!(nsv)) \
ad25789c 1955 nsv = newSVpvn_flags(sstr, slen, SVs_TEMP); \
db79b45b
JH
1956 else \
1957 sv_setpvn(nsv, sstr, slen); \
1958 SvUTF8_off(nsv); \
1959 sv_utf8_upgrade(nsv); \
4bac9ae4 1960 sv_catsv_nomg(dsv, nsv); \
db79b45b 1961 } STMT_END
64534138
FC
1962#define sv_catpvn_nomg_maybeutf8(dsv, sstr, slen, is_utf8) \
1963 sv_catpvn_flags(dsv, sstr, slen, (is_utf8)?SV_CATUTF8:SV_CATBYTES)
79072805 1964
25fdce4a 1965#if defined(PERL_CORE) || defined(PERL_EXT)
aec43834
FC
1966# define sv_or_pv_len_utf8(sv, pv, bytelen) \
1967 (SvGAMAGIC(sv) \
1968 ? utf8_length((U8 *)(pv), (U8 *)(pv)+(bytelen)) \
1969 : sv_len_utf8(sv))
aec43834
FC
1970#endif
1971
954c1994
GS
1972/*
1973=for apidoc Am|SV*|newRV_inc|SV* sv
1974
1975Creates an RV wrapper for an SV. The reference count for the original SV is
1976incremented.
1977
1978=cut
1979*/
1980
5f05dabc 1981#define newRV_inc(sv) newRV(sv)
5f05dabc 1982
796b6530 1983/* the following macros update any magic values this C<sv> is associated with */
79072805 1984
954c1994 1985/*
ccfc67b7
JH
1986=head1 Magical Functions
1987
954c1994 1988=for apidoc Am|void|SvGETMAGIC|SV* sv
f7e029ab
FC
1989Invokes C<mg_get> on an SV if it has 'get' magic. For example, this
1990will call C<FETCH> on a tied variable. This macro evaluates its
954c1994
GS
1991argument more than once.
1992
1993=for apidoc Am|void|SvSETMAGIC|SV* sv
f7e029ab
FC
1994Invokes C<mg_set> on an SV if it has 'set' magic. This is necessary
1995after modifying a scalar, in case it is a magical variable like C<$|>
1996or a tied variable (it calls C<STORE>). This macro evaluates its
954c1994
GS
1997argument more than once.
1998
87ef9da8 1999=for apidoc Am|void|SvSetSV|SV* dsv|SV* ssv
796b6530 2000Calls C<sv_setsv> if C<dsv> is not the same as C<ssv>. May evaluate arguments
f31006c9 2001more than once. Does not handle 'set' magic on the destination SV.
954c1994
GS
2002
2003=for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv
796b6530
KW
2004Calls a non-destructive version of C<sv_setsv> if C<dsv> is not the same as
2005C<ssv>. May evaluate arguments more than once.
954c1994 2006
87ef9da8 2007=for apidoc Am|void|SvSetMagicSV|SV* dsv|SV* ssv
645c22ef
DM
2008Like C<SvSetSV>, but does any set magic required afterwards.
2009
2010=for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv
80663158 2011Like C<SvSetSV_nosteal>, but does any set magic required afterwards.
645c22ef 2012
68795e93 2013=for apidoc Am|void|SvSHARE|SV* sv
796b6530 2014Arranges for C<sv> to be shared between threads if a suitable module
68795e93
NIS
2015has been loaded.
2016
2017=for apidoc Am|void|SvLOCK|SV* sv
796b6530 2018Arranges for a mutual exclusion lock to be obtained on C<sv> if a suitable module
68795e93
NIS
2019has been loaded.
2020
2021=for apidoc Am|void|SvUNLOCK|SV* sv
796b6530 2022Releases a mutual exclusion lock on C<sv> if a suitable module
68795e93
NIS
2023has been loaded.
2024
ccfc67b7
JH
2025=head1 SV Manipulation Functions
2026
679ac26e 2027=for apidoc Am|char *|SvGROW|SV* sv|STRLEN len
954c1994
GS
2028Expands the character buffer in the SV so that it has room for the
2029indicated number of bytes (remember to reserve space for an extra trailing
6602b933 2030C<NUL> character). Calls C<sv_grow> to perform the expansion if necessary.
72d33970 2031Returns a pointer to the character
796b6530 2032buffer. SV must be of type >= C<SVt_PV>. One
4b1e7f06 2033alternative is to call C<sv_grow> if you are not sure of the type of SV.
954c1994 2034
d8732c60
KW
2035You might mistakenly think that C<len> is the number of bytes to add to the
2036existing size, but instead it is the total size C<sv> should be.
2037
45661033
YO
2038=for apidoc Am|char *|SvPVCLEAR|SV* sv
2039Ensures that sv is a SVt_PV and that its SvCUR is 0, and that it is
2040properly null terminated. Equivalent to sv_setpvs(""), but more efficient.
2041
954c1994
GS
2042=cut
2043*/
2044
45661033 2045#define SvPVCLEAR(sv) sv_setpv_bufsize(sv,0,0)
16c91539
BM
2046#define SvSHARE(sv) PL_sharehook(aTHX_ sv)
2047#define SvLOCK(sv) PL_lockhook(aTHX_ sv)
2048#define SvUNLOCK(sv) PL_unlockhook(aTHX_ sv)
2049#define SvDESTROYABLE(sv) PL_destroyhook(aTHX_ sv)
68795e93 2050
5d9574c1
DM
2051#define SvGETMAGIC(x) ((void)(UNLIKELY(SvGMAGICAL(x)) && mg_get(x)))
2052#define SvSETMAGIC(x) STMT_START { if (UNLIKELY(SvSMAGICAL(x))) mg_set(x); } STMT_END
79072805 2053
54310121 2054#define SvSetSV_and(dst,src,finally) \
189b2af5 2055 STMT_START { \
5d9574c1 2056 if (LIKELY((dst) != (src))) { \
54310121 2057 sv_setsv(dst, src); \
2058 finally; \
189b2af5
GS
2059 } \
2060 } STMT_END
54310121 2061#define SvSetSV_nosteal_and(dst,src,finally) \
189b2af5 2062 STMT_START { \
5d9574c1 2063 if (LIKELY((dst) != (src))) { \
34482cd6 2064 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL | SV_DO_COW_SVSETSV); \
54310121 2065 finally; \
189b2af5
GS
2066 } \
2067 } STMT_END
79072805 2068
54310121 2069#define SvSetSV(dst,src) \
c9d716f7 2070 SvSetSV_and(dst,src,/*nothing*/;)
54310121 2071#define SvSetSV_nosteal(dst,src) \
c9d716f7 2072 SvSetSV_nosteal_and(dst,src,/*nothing*/;)
54310121 2073
2074#define SvSetMagicSV(dst,src) \
4e3a8365 2075 SvSetSV_and(dst,src,SvSETMAGIC(dst))
54310121 2076#define SvSetMagicSV_nosteal(dst,src) \
4e3a8365 2077 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst))
54310121 2078
db79b45b 2079
1045810a 2080#if !defined(SKIP_DEBUGGING)
79072805 2081#define SvPEEK(sv) sv_peek(sv)
3967c732
JD
2082#else
2083#define SvPEEK(sv) ""
2084#endif
79072805 2085
3041a168 2086#define SvIMMORTAL(sv) (SvREADONLY(sv) && ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder))
36477c24 2087
fe54beba
DM
2088#ifdef DEBUGGING
2089 /* exercise the immortal resurrection code in sv_free2() */
2090# define SvREFCNT_IMMORTAL 1000
2091#else
2092# define SvREFCNT_IMMORTAL ((~(U32)0)/2)
2093#endif
2094
567f3b56
TC
2095/*
2096=for apidoc Am|SV *|boolSV|bool b
2097
2098Returns a true SV if C<b> is a true value, or a false SV if C<b> is 0.
2099
fbe13c60 2100See also C<L</PL_sv_yes>> and C<L</PL_sv_no>>.
567f3b56
TC
2101
2102=cut
2103*/
2104
3280af22 2105#define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
54310121 2106
79072805 2107#define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
f7877b28
NC
2108/* If I give every macro argument a different name, then there won't be bugs
2109 where nested macros get confused. Been there, done that. */
2110#define isGV_with_GP(pwadak) \
2e5b91de 2111 (((SvFLAGS(pwadak) & (SVp_POK|SVpgv_GP)) == SVpgv_GP) \
f7877b28 2112 && (SvTYPE(pwadak) == SVt_PVGV || SvTYPE(pwadak) == SVt_PVLV))
2e5b91de 2113#define isGV_with_GP_on(sv) STMT_START { \
70ad9799
SP
2114 assert (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVLV); \
2115 assert (!SvPOKp(sv)); \
2116 assert (!SvIOKp(sv)); \
2117 (SvFLAGS(sv) |= SVpgv_GP); \
2e5b91de
NC
2118 } STMT_END
2119#define isGV_with_GP_off(sv) STMT_START { \
70ad9799
SP
2120 assert (SvTYPE(sv) == SVt_PVGV || SvTYPE(sv) == SVt_PVLV); \
2121 assert (!SvPOKp(sv)); \
2122 assert (!SvIOKp(sv)); \
2e5b91de
NC
2123 (SvFLAGS(sv) &= ~SVpgv_GP); \
2124 } STMT_END
8d919b0a
FC
2125#define isREGEXP(sv) \
2126 (SvTYPE(sv) == SVt_REGEXP \
2127 || (SvFLAGS(sv) & (SVTYPEMASK|SVp_POK|SVpgv_GP|SVf_FAKE)) \
2128 == (SVt_PVLV|SVf_FAKE))
2e5b91de 2129
79072805 2130
bba82a09 2131#ifdef PERL_ANY_COW
db2c6cb3 2132# define SvGROW(sv,len) \
6bbd724f 2133 (SvIsCOW(sv) || SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
db2c6cb3 2134#else
6bbd724f 2135# define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
db2c6cb3 2136#endif
6bbd724f
DM
2137#define SvGROW_mutable(sv,len) \
2138 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv))
933fea7f 2139#define Sv_Grow sv_grow
3d35f11b 2140
a0739874
DM
2141#define CLONEf_COPY_STACKS 1
2142#define CLONEf_KEEP_PTR_TABLE 2
c43294b8 2143#define CLONEf_CLONE_HOST 4
0405e91e 2144#define CLONEf_JOIN_IN 8
a0739874 2145
8cf8f3d1 2146struct clone_params {
d2d73c3e
AB
2147 AV* stashes;
2148 UV flags;
59b40662 2149 PerlInterpreter *proto_perl;
1db366cc 2150 PerlInterpreter *new_perl;
d08d57ef 2151 AV *unreferenced;
8cf8f3d1 2152};
102d3b8a
NC
2153
2154/*
740cce10
NC
2155=for apidoc Am|SV*|newSVpvn_utf8|NULLOK const char* s|STRLEN len|U32 utf8
2156
30a15352 2157Creates a new SV and copies a string (which may contain C<NUL> (C<\0>)
796b6530 2158characters) into it. If C<utf8> is true, calls
740cce10
NC
2159C<SvUTF8_on> on the new SV. Implemented as a wrapper around C<newSVpvn_flags>.
2160
2161=cut
2162*/
2163
2164#define newSVpvn_utf8(s, len, u) newSVpvn_flags((s), (len), (u) ? SVf_UTF8 : 0)
2165
2166/*
35e035cc
FC
2167=for apidoc Amx|SV*|newSVpadname|PADNAME *pn
2168
0f94cb1f 2169Creates a new SV containing the pad name.
35e035cc
FC
2170
2171=cut
2172*/
2173
0f94cb1f 2174#define newSVpadname(pn) newSVpvn_utf8(PadnamePV(pn), PadnameLEN(pn), TRUE)
35e035cc
FC
2175
2176/*
69240efd
NC
2177=for apidoc Am|void|SvOOK_offset|NN SV*sv|STRLEN len
2178
796b6530 2179Reads into C<len> the offset from C<SvPVX> back to the true start of the
69240efd 2180allocated buffer, which will be non-zero if C<sv_chop> has been used to
8554e7a0 2181efficiently remove characters from start of the buffer. Implemented as a
2d7f6611
KW
2182macro, which takes the address of C<len>, which must be of type C<STRLEN>.
2183Evaluates C<sv> more than once. Sets C<len> to 0 if C<SvOOK(sv)> is false.
69240efd
NC
2184
2185=cut
2186*/
2187
2188#ifdef DEBUGGING
2189/* Does the bot know something I don't?
219010:28 <@Nicholas> metabatman
219110:28 <+meta> Nicholas: crash
2192*/
2193# define SvOOK_offset(sv, offset) STMT_START { \
2194 assert(sizeof(offset) == sizeof(STRLEN)); \
2195 if (SvOOK(sv)) { \
d845901f
CS
2196 const U8 *_crash = (U8*)SvPVX_const(sv); \
2197 (offset) = *--_crash; \
2198 if (!(offset)) { \
2199 _crash -= sizeof(STRLEN); \
2200 Copy(_crash, (U8 *)&(offset), sizeof(STRLEN), U8); \
69240efd
NC
2201 } \
2202 { \
2203 /* Validate the preceding buffer's sentinels to \
2204 verify that no-one is using it. */ \
d845901f
CS
2205 const U8 *const _bonk = (U8*)SvPVX_const(sv) - (offset);\
2206 while (_crash > _bonk) { \
2207 --_crash; \
2208 assert (*_crash == (U8)PTR2UV(_crash)); \
69240efd
NC
2209 } \
2210 } \
2211 } else { \
d845901f 2212 (offset) = 0; \
69240efd
NC
2213 } \
2214 } STMT_END
2215#else
2216 /* This is the same code, but avoids using any temporary variables: */
2217# define SvOOK_offset(sv, offset) STMT_START { \
2218 assert(sizeof(offset) == sizeof(STRLEN)); \
2219 if (SvOOK(sv)) { \
d845901f
CS
2220 (offset) = ((U8*)SvPVX_const(sv))[-1]; \
2221 if (!(offset)) { \
69240efd 2222 Copy(SvPVX_const(sv) - 1 - sizeof(STRLEN), \
d845901f 2223 (U8*)&(offset), sizeof(STRLEN), U8); \
69240efd
NC
2224 } \
2225 } else { \
d845901f 2226 (offset) = 0; \
69240efd
NC
2227 } \
2228 } STMT_END
2229#endif
85dca89a
NC
2230
2231#define newIO() MUTABLE_IO(newSV_type(SVt_PVIO))
2232
a38ab475
RZ
2233#define SV_CONST(name) \
2234 PL_sv_consts[SV_CONST_##name] \
2235 ? PL_sv_consts[SV_CONST_##name] \
2236 : (PL_sv_consts[SV_CONST_##name] = newSVpv_share(#name, 0))
2237
2238#define SV_CONST_TIESCALAR 0
2239#define SV_CONST_TIEARRAY 1
2240#define SV_CONST_TIEHASH 2
2241#define SV_CONST_TIEHANDLE 3
2242
2243#define SV_CONST_FETCH 4
2244#define SV_CONST_FETCHSIZE 5
2245#define SV_CONST_STORE 6
2246#define SV_CONST_STORESIZE 7
2247#define SV_CONST_EXISTS 8
2248
2249#define SV_CONST_PUSH 9
2250#define SV_CONST_POP 10
2251#define SV_CONST_SHIFT 11
2252#define SV_CONST_UNSHIFT 12
2253#define SV_CONST_SPLICE 13
2254#define SV_CONST_EXTEND 14
2255
2256#define SV_CONST_FIRSTKEY 15
2257#define SV_CONST_NEXTKEY 16
2258#define SV_CONST_SCALAR 17
2259
2260#define SV_CONST_OPEN 18
2261#define SV_CONST_WRITE 19
2262#define SV_CONST_PRINT 20
2263#define SV_CONST_PRINTF 21
2264#define SV_CONST_READ 22
2265#define SV_CONST_READLINE 23
2266#define SV_CONST_GETC 24
2267#define SV_CONST_SEEK 25
2268#define SV_CONST_TELL 26
2269#define SV_CONST_EOF 27
2270#define SV_CONST_BINMODE 28
2271#define SV_CONST_FILENO 29
2272#define SV_CONST_CLOSE 30
2273
2274#define SV_CONST_DELETE 31
2275#define SV_CONST_CLEAR 32
2276#define SV_CONST_UNTIE 33
2277#define SV_CONST_DESTROY 34
2278
2279#define SV_CONSTS_COUNT 35
2280
69240efd 2281/*
82fce3d0
DM
2282 * Bodyless IVs and NVs!
2283 *
2284 * Since 5.9.2, we can avoid allocating a body for SVt_IV-type SVs.
2285 * Since the larger IV-holding variants of SVs store their integer
2286 * values in their respective bodies, the family of SvIV() accessor
2287 * macros would naively have to branch on the SV type to find the
2288 * integer value either in the HEAD or BODY. In order to avoid this
2289 * expensive branch, a clever soul has deployed a great hack:
2290 * We set up the SvANY pointer such that instead of pointing to a
2291 * real body, it points into the memory before the location of the
2292 * head. We compute this pointer such that the location of
2293 * the integer member of the hypothetical body struct happens to
2294 * be the same as the location of the integer member of the bodyless
2295 * SV head. This now means that the SvIV() family of accessors can
2296 * always read from the (hypothetical or real) body via SvANY.
2297 *
2298 * Since the 5.21 dev series, we employ the same trick for NVs
2299 * if the architecture can support it (NVSIZE <= IVSIZE).
2300 */
2301
2302/* The following two macros compute the necessary offsets for the above
2303 * trick and store them in SvANY for SvIV() (and friends) to use. */
2304
2305#ifdef PERL_CORE
2306# define SET_SVANY_FOR_BODYLESS_IV(sv) \
2307 SvANY(sv) = (XPVIV*)((char*)&(sv->sv_u.svu_iv) \
2308 - STRUCT_OFFSET(XPVIV, xiv_iv))
2309
2310# define SET_SVANY_FOR_BODYLESS_NV(sv) \
2311 SvANY(sv) = (XPVNV*)((char*)&(sv->sv_u.svu_nv) \
2312 - STRUCT_OFFSET(XPVNV, xnv_u.xnv_nv))
2313#endif
2314
2315/*
14d04a33 2316 * ex: set ts=8 sts=4 sw=4 et:
102d3b8a 2317 */