1 /* sv.h 2 * 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006 by Larry Wall and others 5 * 6 * You may distribute under the terms of either the GNU General Public 7 * License or the Artistic License, as specified in the README file. 8 * 9 */ 10 11 #ifdef sv_flags 12 #undef sv_flags /* Convex has this in <signal.h> for sigvec() */ 13 #endif 14 15 /* 16 =head1 SV Flags 17 18 =for apidoc AmU||svtype 19 An enum of flags for Perl types. These are found in the file B<sv.h> 20 in the C<svtype> enum. Test these flags with the C<SvTYPE> macro. 21 22 =for apidoc AmU||SVt_PV 23 Pointer type flag for scalars. See C<svtype>. 24 25 =for apidoc AmU||SVt_IV 26 Integer type flag for scalars. See C<svtype>. 27 28 =for apidoc AmU||SVt_NV 29 Double type flag for scalars. See C<svtype>. 30 31 =for apidoc AmU||SVt_PVMG 32 Type flag for blessed scalars. See C<svtype>. 33 34 =for apidoc AmU||SVt_PVAV 35 Type flag for arrays. See C<svtype>. 36 37 =for apidoc AmU||SVt_PVHV 38 Type flag for hashes. See C<svtype>. 39 40 =for apidoc AmU||SVt_PVCV 41 Type flag for code refs. See C<svtype>. 42 43 =cut 44 */ 45 46 typedef enum { 47 SVt_NULL, /* 0 */ 48 SVt_IV, /* 1 */ 49 SVt_NV, /* 2 */ 50 SVt_RV, /* 3 */ 51 SVt_PV, /* 4 */ 52 SVt_PVIV, /* 5 */ 53 SVt_PVNV, /* 6 */ 54 SVt_PVMG, /* 7 */ 55 SVt_PVBM, /* 8 */ 56 SVt_PVLV, /* 9 */ 57 SVt_PVAV, /* 10 */ 58 SVt_PVHV, /* 11 */ 59 SVt_PVCV, /* 12 */ 60 SVt_PVGV, /* 13 */ 61 SVt_PVFM, /* 14 */ 62 SVt_PVIO /* 15 */ 63 } svtype; 64 65 /* Using C's structural equivalence to help emulate C++ inheritance here... */ 66 67 struct STRUCT_SV { /* struct sv { */ 68 void* sv_any; /* pointer to something */ 69 U32 sv_refcnt; /* how many references to us */ 70 U32 sv_flags; /* what we are */ 71 }; 72 73 struct gv { 74 XPVGV* sv_any; /* pointer to something */ 75 U32 sv_refcnt; /* how many references to us */ 76 U32 sv_flags; /* what we are */ 77 }; 78 79 struct cv { 80 XPVCV* sv_any; /* pointer to something */ 81 U32 sv_refcnt; /* how many references to us */ 82 U32 sv_flags; /* what we are */ 83 }; 84 85 struct av { 86 XPVAV* sv_any; /* pointer to something */ 87 U32 sv_refcnt; /* how many references to us */ 88 U32 sv_flags; /* what we are */ 89 }; 90 91 struct hv { 92 XPVHV* sv_any; /* pointer to something */ 93 U32 sv_refcnt; /* how many references to us */ 94 U32 sv_flags; /* what we are */ 95 }; 96 97 struct io { 98 XPVIO* sv_any; /* pointer to something */ 99 U32 sv_refcnt; /* how many references to us */ 100 U32 sv_flags; /* what we are */ 101 }; 102 103 /* 104 =head1 SV Manipulation Functions 105 106 =for apidoc Am|U32|SvREFCNT|SV* sv 107 Returns the value of the object's reference count. 108 109 =for apidoc Am|SV*|SvREFCNT_inc|SV* sv 110 Increments the reference count of the given SV. 111 112 =for apidoc Am|void|SvREFCNT_dec|SV* sv 113 Decrements the reference count of the given SV. 114 115 =for apidoc Am|svtype|SvTYPE|SV* sv 116 Returns the type of the SV. See C<svtype>. 117 118 =for apidoc Am|void|SvUPGRADE|SV* sv|svtype type 119 Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to 120 perform the upgrade if necessary. See C<svtype>. 121 122 =cut 123 */ 124 125 #define SvANY(sv) (sv)->sv_any 126 #define SvFLAGS(sv) (sv)->sv_flags 127 #define SvREFCNT(sv) (sv)->sv_refcnt 128 129 #ifdef USE_5005THREADS 130 131 # if defined(VMS) 132 # define ATOMIC_INC(count) __ATOMIC_INCREMENT_LONG(&count) 133 # define ATOMIC_DEC_AND_TEST(res,count) res=(1==__ATOMIC_DECREMENT_LONG(&count)) 134 # else 135 # ifdef EMULATE_ATOMIC_REFCOUNTS 136 # define ATOMIC_INC(count) STMT_START { \ 137 MUTEX_LOCK(&PL_svref_mutex); \ 138 ++count; \ 139 MUTEX_UNLOCK(&PL_svref_mutex); \ 140 } STMT_END 141 # define ATOMIC_DEC_AND_TEST(res,count) STMT_START { \ 142 MUTEX_LOCK(&PL_svref_mutex); \ 143 res = (--count == 0); \ 144 MUTEX_UNLOCK(&PL_svref_mutex); \ 145 } STMT_END 146 # else 147 # define ATOMIC_INC(count) atomic_inc(&count) 148 # define ATOMIC_DEC_AND_TEST(res,count) (res = atomic_dec_and_test(&count)) 149 # endif /* EMULATE_ATOMIC_REFCOUNTS */ 150 # endif /* VMS */ 151 #else 152 # define ATOMIC_INC(count) (++count) 153 # define ATOMIC_DEC_AND_TEST(res, count) (res = (--count == 0)) 154 #endif /* USE_5005THREADS */ 155 156 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) && !defined(PERL_GCC_PEDANTIC) 157 # define SvREFCNT_inc(sv) \ 158 ({ \ 159 SV * const _sv = (SV*)(sv); \ 160 if (_sv) \ 161 ATOMIC_INC(SvREFCNT(_sv)); \ 162 _sv; \ 163 }) 164 #else 165 # ifdef USE_5005THREADS 166 # if defined(VMS) && defined(__ALPHA) 167 # define SvREFCNT_inc(sv) \ 168 (PL_Sv=(SV*)(sv), (PL_Sv && __ATOMIC_INCREMENT_LONG(&(SvREFCNT(PL_Sv)))), (SV *)PL_Sv) 169 # else 170 # define SvREFCNT_inc(sv) sv_newref((SV*)sv) 171 # endif 172 # else 173 # define SvREFCNT_inc(sv) \ 174 ((PL_Sv=(SV*)(sv)), (PL_Sv && ATOMIC_INC(SvREFCNT(PL_Sv))), (SV*)PL_Sv) 175 # endif 176 #endif 177 178 #define SvREFCNT_dec(sv) sv_free((SV*)(sv)) 179 180 #define SVTYPEMASK 0xff 181 #define SvTYPE(sv) ((sv)->sv_flags & SVTYPEMASK) 182 183 #define SvUPGRADE(sv, mt) (SvTYPE(sv) >= mt || sv_upgrade(sv, mt)) 184 185 #define SVs_PADBUSY 0x00000100 /* reserved for tmp or my already */ 186 #define SVs_PADTMP 0x00000200 /* in use as tmp */ 187 #define SVs_PADMY 0x00000400 /* in use a "my" variable */ 188 #define SVs_TEMP 0x00000800 /* string is stealable? */ 189 #define SVs_OBJECT 0x00001000 /* is "blessed" */ 190 #define SVs_GMG 0x00002000 /* has magical get method */ 191 #define SVs_SMG 0x00004000 /* has magical set method */ 192 #define SVs_RMG 0x00008000 /* has random magical methods */ 193 194 #define SVf_IOK 0x00010000 /* has valid public integer value */ 195 #define SVf_NOK 0x00020000 /* has valid public numeric value */ 196 #define SVf_POK 0x00040000 /* has valid public pointer value */ 197 #define SVf_ROK 0x00080000 /* has a valid reference pointer */ 198 199 #define SVf_FAKE 0x00100000 /* glob or lexical is just a copy */ 200 #define SVf_OOK 0x00200000 /* has valid offset value */ 201 #define SVf_BREAK 0x00400000 /* refcnt is artificially low - used 202 * by SV's in final arena cleanup */ 203 #define SVf_READONLY 0x00800000 /* may not be modified */ 204 205 206 #define SVp_IOK 0x01000000 /* has valid non-public integer value */ 207 #define SVp_NOK 0x02000000 /* has valid non-public numeric value */ 208 #define SVp_POK 0x04000000 /* has valid non-public pointer value */ 209 #define SVp_SCREAM 0x08000000 /* has been studied? */ 210 211 #define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded */ 212 213 #define SVf_THINKFIRST (SVf_READONLY|SVf_ROK|SVf_FAKE) 214 215 #define SVf_OK (SVf_IOK|SVf_NOK|SVf_POK|SVf_ROK| \ 216 SVp_IOK|SVp_NOK|SVp_POK) 217 218 #define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */ 219 220 #define PRIVSHIFT 8 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */ 221 222 /* Some private flags. */ 223 224 /* SVpad_OUR may be set on SVt_PV{NV,MG,GV} types */ 225 #define SVpad_OUR 0x80000000 /* pad name is "our" instead of "my" */ 226 #define SVpad_TYPED 0x40000000 /* Typed Lexical */ 227 228 #define SVf_IVisUV 0x80000000 /* use XPVUV instead of XPVIV */ 229 230 #define SVpfm_COMPILED 0x80000000 /* FORMLINE is compiled */ 231 232 #define SVpbm_VALID 0x80000000 233 #define SVpbm_TAIL 0x40000000 234 235 #define SVrepl_EVAL 0x40000000 /* Replacement part of s///e */ 236 237 #define SVphv_CLONEABLE 0x08000000 /* for stashes: clone its objects */ 238 #define SVphv_REHASH 0x10000000 /* HV is recalculating hash values */ 239 #define SVphv_SHAREKEYS 0x20000000 /* keys live on shared string table */ 240 #define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */ 241 #define SVphv_HASKFLAGS 0x80000000 /* keys have flag byte after hash */ 242 243 #define SVprv_WEAKREF 0x80000000 /* Weak reference */ 244 245 struct xrv { 246 SV * xrv_rv; /* pointer to another SV */ 247 }; 248 249 struct xpv { 250 char * xpv_pv; /* pointer to malloced string */ 251 STRLEN xpv_cur; /* length of xpv_pv as a C string */ 252 STRLEN xpv_len; /* allocated size */ 253 }; 254 255 struct xpviv { 256 char * xpv_pv; /* pointer to malloced string */ 257 STRLEN xpv_cur; /* length of xpv_pv as a C string */ 258 STRLEN xpv_len; /* allocated size */ 259 IV xiv_iv; /* integer value or pv offset */ 260 }; 261 262 struct xpvuv { 263 char * xpv_pv; /* pointer to malloced string */ 264 STRLEN xpv_cur; /* length of xpv_pv as a C string */ 265 STRLEN xpv_len; /* allocated size */ 266 UV xuv_uv; /* unsigned value or pv offset */ 267 }; 268 269 struct xpvnv { 270 char * xpv_pv; /* pointer to malloced string */ 271 STRLEN xpv_cur; /* length of xpv_pv as a C string */ 272 STRLEN xpv_len; /* allocated size */ 273 IV xiv_iv; /* integer value or pv offset */ 274 NV xnv_nv; /* numeric value, if any */ 275 }; 276 277 /* These structure must match the beginning of struct xpvhv in hv.h. */ 278 struct xpvmg { 279 char * xpv_pv; /* pointer to malloced string */ 280 STRLEN xpv_cur; /* length of xpv_pv as a C string */ 281 STRLEN xpv_len; /* allocated size */ 282 IV xiv_iv; /* integer value or pv offset */ 283 NV xnv_nv; /* numeric value, if any */ 284 MAGIC* xmg_magic; /* linked list of magicalness */ 285 HV* xmg_stash; /* class package */ 286 }; 287 288 struct xpvlv { 289 char * xpv_pv; /* pointer to malloced string */ 290 STRLEN xpv_cur; /* length of xpv_pv as a C string */ 291 STRLEN xpv_len; /* allocated size */ 292 IV xiv_iv; /* integer value or pv offset */ 293 NV xnv_nv; /* numeric value, if any */ 294 MAGIC* xmg_magic; /* linked list of magicalness */ 295 HV* xmg_stash; /* class package */ 296 297 STRLEN xlv_targoff; 298 STRLEN xlv_targlen; 299 SV* xlv_targ; 300 char xlv_type; /* k=keys .=pos x=substr v=vec /=join/re 301 * y=alem/helem/iter t=tie T=tied HE */ 302 }; 303 304 struct xpvgv { 305 char * xpv_pv; /* pointer to malloced string */ 306 STRLEN xpv_cur; /* length of xpv_pv as a C string */ 307 STRLEN xpv_len; /* allocated size */ 308 IV xiv_iv; /* integer value or pv offset */ 309 NV xnv_nv; /* numeric value, if any */ 310 MAGIC* xmg_magic; /* linked list of magicalness */ 311 HV* xmg_stash; /* class package */ 312 313 GP* xgv_gp; 314 char* xgv_name; 315 STRLEN xgv_namelen; 316 HV* xgv_stash; 317 U8 xgv_flags; 318 }; 319 320 struct xpvbm { 321 char * xpv_pv; /* pointer to malloced string */ 322 STRLEN xpv_cur; /* length of xpv_pv as a C string */ 323 STRLEN xpv_len; /* allocated size */ 324 IV xiv_iv; /* integer value or pv offset */ 325 NV xnv_nv; /* numeric value, if any */ 326 MAGIC* xmg_magic; /* linked list of magicalness */ 327 HV* xmg_stash; /* class package */ 328 329 I32 xbm_useful; /* is this constant pattern being useful? */ 330 U16 xbm_previous; /* how many characters in string before rare? */ 331 U8 xbm_rare; /* rarest character in string */ 332 }; 333 334 /* This structure must match XPVCV in cv.h */ 335 336 typedef U16 cv_flags_t; 337 338 struct xpvfm { 339 char * xpv_pv; /* pointer to malloced string */ 340 STRLEN xpv_cur; /* length of xpv_pv as a C string */ 341 STRLEN xpv_len; /* allocated size */ 342 IV xiv_iv; /* integer value or pv offset */ 343 NV xnv_nv; /* numeric value, if any */ 344 MAGIC* xmg_magic; /* linked list of magicalness */ 345 HV* xmg_stash; /* class package */ 346 347 HV * xcv_stash; 348 OP * xcv_start; 349 OP * xcv_root; 350 void (*xcv_xsub)(pTHX_ CV*); 351 ANY xcv_xsubany; 352 GV * xcv_gv; 353 char * xcv_file; 354 long xcv_depth; /* >= 2 indicates recursive call */ 355 AV * xcv_padlist; 356 CV * xcv_outside; 357 #ifdef USE_5005THREADS 358 perl_mutex *xcv_mutexp; /* protects xcv_owner */ 359 struct perl_thread *xcv_owner; /* current owner thread */ 360 #endif /* USE_5005THREADS */ 361 cv_flags_t xcv_flags; 362 U32 xcv_outside_seq; /* the COP sequence (at the point of our 363 * compilation) in the lexically enclosing 364 * sub */ 365 IV xfm_lines; 366 }; 367 368 struct xpvio { 369 char * xpv_pv; /* pointer to malloced string */ 370 STRLEN xpv_cur; /* length of xpv_pv as a C string */ 371 STRLEN xpv_len; /* allocated size */ 372 IV xiv_iv; /* integer value or pv offset */ 373 NV xnv_nv; /* numeric value, if any */ 374 MAGIC* xmg_magic; /* linked list of magicalness */ 375 HV* xmg_stash; /* class package */ 376 377 PerlIO * xio_ifp; /* ifp and ofp are normally the same */ 378 PerlIO * xio_ofp; /* but sockets need separate streams */ 379 /* Cray addresses everything by word boundaries (64 bits) and 380 * code and data pointers cannot be mixed (which is exactly what 381 * Perl_filter_add() tries to do with the dirp), hence the following 382 * union trick (as suggested by Gurusamy Sarathy). 383 * For further information see Geir Johansen's problem report titled 384 [ID 20000612.002] Perl problem on Cray system 385 * The any pointer (known as IoANY()) will also be a good place 386 * to hang any IO disciplines to. 387 */ 388 union { 389 DIR * xiou_dirp; /* for opendir, readdir, etc */ 390 void * xiou_any; /* for alignment */ 391 } xio_dirpu; 392 IV xio_lines; /* $. */ 393 IV xio_page; /* $% */ 394 IV xio_page_len; /* $= */ 395 IV xio_lines_left; /* $- */ 396 char * xio_top_name; /* $^ */ 397 GV * xio_top_gv; /* $^ */ 398 char * xio_fmt_name; /* $~ */ 399 GV * xio_fmt_gv; /* $~ */ 400 char * xio_bottom_name;/* $^B */ 401 GV * xio_bottom_gv; /* $^B */ 402 short xio_subprocess; /* -| or |- */ 403 char xio_type; 404 char xio_flags; 405 }; 406 #define xio_dirp xio_dirpu.xiou_dirp 407 #define xio_any xio_dirpu.xiou_any 408 409 #define IOf_ARGV 1 /* this fp iterates over ARGV */ 410 #define IOf_START 2 /* check for null ARGV and substitute '-' */ 411 #define IOf_FLUSH 4 /* this fp wants a flush after write op */ 412 #define IOf_DIDTOP 8 /* just did top of form */ 413 #define IOf_UNTAINT 16 /* consider this fp (and its data) "safe" */ 414 #define IOf_NOLINE 32 /* slurped a pseudo-line from empty file */ 415 #define IOf_FAKE_DIRP 64 /* xio_dirp is fake (source filters kludge) */ 416 417 /* The following macros define implementation-independent predicates on SVs. */ 418 419 /* 420 =for apidoc Am|bool|SvNIOK|SV* sv 421 Returns a boolean indicating whether the SV contains a number, integer or 422 double. 423 424 =for apidoc Am|bool|SvNIOKp|SV* sv 425 Returns a boolean indicating whether the SV contains a number, integer or 426 double. Checks the B<private> setting. Use C<SvNIOK>. 427 428 =for apidoc Am|void|SvNIOK_off|SV* sv 429 Unsets the NV/IV status of an SV. 430 431 =for apidoc Am|bool|SvOK|SV* sv 432 Returns a boolean indicating whether the value is an SV. It also tells 433 whether the value is defined or not. 434 435 =for apidoc Am|bool|SvIOKp|SV* sv 436 Returns a boolean indicating whether the SV contains an integer. Checks 437 the B<private> setting. Use C<SvIOK>. 438 439 =for apidoc Am|bool|SvNOKp|SV* sv 440 Returns a boolean indicating whether the SV contains a double. Checks the 441 B<private> setting. Use C<SvNOK>. 442 443 =for apidoc Am|bool|SvPOKp|SV* sv 444 Returns a boolean indicating whether the SV contains a character string. 445 Checks the B<private> setting. Use C<SvPOK>. 446 447 =for apidoc Am|bool|SvIOK|SV* sv 448 Returns a boolean indicating whether the SV contains an integer. 449 450 =for apidoc Am|void|SvIOK_on|SV* sv 451 Tells an SV that it is an integer. 452 453 =for apidoc Am|void|SvIOK_off|SV* sv 454 Unsets the IV status of an SV. 455 456 =for apidoc Am|void|SvIOK_only|SV* sv 457 Tells an SV that it is an integer and disables all other OK bits. 458 459 =for apidoc Am|void|SvIOK_only_UV|SV* sv 460 Tells and SV that it is an unsigned integer and disables all other OK bits. 461 462 =for apidoc Am|bool|SvIOK_UV|SV* sv 463 Returns a boolean indicating whether the SV contains an unsigned integer. 464 465 =for apidoc Am|void|SvUOK|SV* sv 466 Returns a boolean indicating whether the SV contains an unsigned integer. 467 468 =for apidoc Am|bool|SvIOK_notUV|SV* sv 469 Returns a boolean indicating whether the SV contains a signed integer. 470 471 =for apidoc Am|bool|SvNOK|SV* sv 472 Returns a boolean indicating whether the SV contains a double. 473 474 =for apidoc Am|void|SvNOK_on|SV* sv 475 Tells an SV that it is a double. 476 477 =for apidoc Am|void|SvNOK_off|SV* sv 478 Unsets the NV status of an SV. 479 480 =for apidoc Am|void|SvNOK_only|SV* sv 481 Tells an SV that it is a double and disables all other OK bits. 482 483 =for apidoc Am|bool|SvPOK|SV* sv 484 Returns a boolean indicating whether the SV contains a character 485 string. 486 487 =for apidoc Am|void|SvPOK_on|SV* sv 488 Tells an SV that it is a string. 489 490 =for apidoc Am|void|SvPOK_off|SV* sv 491 Unsets the PV status of an SV. 492 493 =for apidoc Am|void|SvPOK_only|SV* sv 494 Tells an SV that it is a string and disables all other OK bits. 495 Will also turn off the UTF-8 status. 496 497 =for apidoc Am|bool|SvOOK|SV* sv 498 Returns a boolean indicating whether the SvIVX is a valid offset value for 499 the SvPVX. This hack is used internally to speed up removal of characters 500 from the beginning of a SvPV. When SvOOK is true, then the start of the 501 allocated string buffer is really (SvPVX - SvIVX). 502 503 =for apidoc Am|bool|SvROK|SV* sv 504 Tests if the SV is an RV. 505 506 =for apidoc Am|void|SvROK_on|SV* sv 507 Tells an SV that it is an RV. 508 509 =for apidoc Am|void|SvROK_off|SV* sv 510 Unsets the RV status of an SV. 511 512 =for apidoc Am|SV*|SvRV|SV* sv 513 Dereferences an RV to return the SV. 514 515 =for apidoc Am|IV|SvIVX|SV* sv 516 Returns the raw value in the SV's IV slot, without checks or conversions. 517 Only use when you are sure SvIOK is true. See also C<SvIV()>. 518 519 =for apidoc Am|UV|SvUVX|SV* sv 520 Returns the raw value in the SV's UV slot, without checks or conversions. 521 Only use when you are sure SvIOK is true. See also C<SvUV()>. 522 523 =for apidoc Am|NV|SvNVX|SV* sv 524 Returns the raw value in the SV's NV slot, without checks or conversions. 525 Only use when you are sure SvNOK is true. See also C<SvNV()>. 526 527 =for apidoc Am|char*|SvPVX|SV* sv 528 Returns a pointer to the physical string in the SV. The SV must contain a 529 string. 530 531 =for apidoc Am|STRLEN|SvCUR|SV* sv 532 Returns the length of the string which is in the SV. See C<SvLEN>. 533 534 =for apidoc Am|STRLEN|SvLEN|SV* sv 535 Returns the size of the string buffer in the SV, not including any part 536 attributable to C<SvOOK>. See C<SvCUR>. 537 538 =for apidoc Am|char*|SvEND|SV* sv 539 Returns a pointer to the last character in the string which is in the SV. 540 See C<SvCUR>. Access the character as *(SvEND(sv)). 541 542 =for apidoc Am|HV*|SvSTASH|SV* sv 543 Returns the stash of the SV. 544 545 =for apidoc Am|void|SvIV_set|SV* sv|IV val 546 Set the value of the IV pointer in sv to val. It is possible to perform 547 the same function of this macro with an lvalue assignment to C<SvIVX>. 548 With future Perls, however, it will be more efficient to use 549 C<SvIV_set> instead of the lvalue assignment to C<SvIVX>. 550 551 =for apidoc Am|void|SvNV_set|SV* sv|NV val 552 Set the value of the NV pointer in sv to val. See C<SvIV_set>. 553 554 =for apidoc Am|void|SvPV_set|SV* sv|char* val 555 Set the value of the PV pointer in sv to val. See C<SvIV_set>. 556 557 =for apidoc Am|void|SvUV_set|SV* sv|UV val 558 Set the value of the UV pointer in sv to val. See C<SvIV_set>. 559 560 =for apidoc Am|void|SvRV_set|SV* sv|SV* val 561 Set the value of the RV pointer in sv to val. See C<SvIV_set>. 562 563 =for apidoc Am|void|SvMAGIC_set|SV* sv|MAGIC* val 564 Set the value of the MAGIC pointer in sv to val. See C<SvIV_set>. 565 566 =for apidoc Am|void|SvSTASH_set|SV* sv|STASH* val 567 Set the value of the STASH pointer in sv to val. See C<SvIV_set>. 568 569 =for apidoc Am|void|SvCUR_set|SV* sv|STRLEN len 570 Set the current length of the string which is in the SV. See C<SvCUR> 571 and C<SvIV_set>. 572 573 =for apidoc Am|void|SvLEN_set|SV* sv|STRLEN len 574 Set the actual length of the string which is in the SV. See C<SvIV_set>. 575 576 =cut 577 */ 578 579 #define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK)) 580 #define SvNIOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK)) 581 #define SvNIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK| \ 582 SVp_IOK|SVp_NOK|SVf_IVisUV)) 583 584 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN) 585 #define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}), 586 #else 587 #define assert_not_ROK(sv) 588 #endif 589 590 #define SvOK(sv) (SvFLAGS(sv) & SVf_OK) 591 #define SvOK_off(sv) (assert_not_ROK(sv) \ 592 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \ 593 SVf_IVisUV|SVf_UTF8), \ 594 SvOOK_off(sv)) 595 #define SvOK_off_exc_UV(sv) (assert_not_ROK(sv) \ 596 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \ 597 SVf_UTF8), \ 598 SvOOK_off(sv)) 599 600 #define SvOKp(sv) (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) 601 #define SvIOKp(sv) (SvFLAGS(sv) & SVp_IOK) 602 #define SvIOKp_on(sv) ((void)SvOOK_off(sv), SvFLAGS(sv) |= SVp_IOK) 603 #define SvNOKp(sv) (SvFLAGS(sv) & SVp_NOK) 604 #define SvNOKp_on(sv) (SvFLAGS(sv) |= SVp_NOK) 605 #define SvPOKp(sv) (SvFLAGS(sv) & SVp_POK) 606 #define SvPOKp_on(sv) (assert_not_ROK(sv) \ 607 SvFLAGS(sv) |= SVp_POK) 608 609 #define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK) 610 #define SvIOK_on(sv) ((void)SvOOK_off(sv), \ 611 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK)) 612 #define SvIOK_off(sv) (SvFLAGS(sv) &= ~(SVf_IOK|SVp_IOK|SVf_IVisUV)) 613 #define SvIOK_only(sv) (SvOK_off(sv), \ 614 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK)) 615 #define SvIOK_only_UV(sv) (SvOK_off_exc_UV(sv), \ 616 SvFLAGS(sv) |= (SVf_IOK|SVp_IOK)) 617 618 #define SvIOK_UV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \ 619 == (SVf_IOK|SVf_IVisUV)) 620 #define SvUOK(sv) SvIOK_UV(sv) 621 #define SvIOK_notUV(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) \ 622 == SVf_IOK) 623 624 #define SvVOK(sv) (SvMAGICAL(sv) && mg_find(sv,'V')) 625 #define SvIsUV(sv) (SvFLAGS(sv) & SVf_IVisUV) 626 #define SvIsUV_on(sv) (SvFLAGS(sv) |= SVf_IVisUV) 627 #define SvIsUV_off(sv) (SvFLAGS(sv) &= ~SVf_IVisUV) 628 629 #define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK) 630 #define SvNOK_on(sv) (SvFLAGS(sv) |= (SVf_NOK|SVp_NOK)) 631 #define SvNOK_off(sv) (SvFLAGS(sv) &= ~(SVf_NOK|SVp_NOK)) 632 #define SvNOK_only(sv) (SvOK_off(sv), \ 633 SvFLAGS(sv) |= (SVf_NOK|SVp_NOK)) 634 635 /* 636 =for apidoc Am|bool|SvUTF8|SV* sv 637 Returns a boolean indicating whether the SV contains UTF-8 encoded data. 638 639 =for apidoc Am|void|SvUTF8_on|SV *sv 640 Turn on the UTF-8 status of an SV (the data is not changed, just the flag). 641 Do not use frivolously. 642 643 =for apidoc Am|void|SvUTF8_off|SV *sv 644 Unsets the UTF-8 status of an SV. 645 646 =for apidoc Am|void|SvPOK_only_UTF8|SV* sv 647 Tells an SV that it is a string and disables all other OK bits, 648 and leaves the UTF-8 status as it was. 649 650 =cut 651 */ 652 653 #define SvUTF8(sv) (SvFLAGS(sv) & SVf_UTF8) 654 #define SvUTF8_on(sv) (SvFLAGS(sv) |= (SVf_UTF8)) 655 #define SvUTF8_off(sv) (SvFLAGS(sv) &= ~(SVf_UTF8)) 656 657 #define SvPOK(sv) (SvFLAGS(sv) & SVf_POK) 658 #define SvPOK_on(sv) (assert_not_ROK(sv) \ 659 SvFLAGS(sv) |= (SVf_POK|SVp_POK)) 660 #define SvPOK_off(sv) (SvFLAGS(sv) &= ~(SVf_POK|SVp_POK)) 661 #define SvPOK_only(sv) (assert_not_ROK(sv) \ 662 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \ 663 SVf_IVisUV|SVf_UTF8), \ 664 SvFLAGS(sv) |= (SVf_POK|SVp_POK)) 665 #define SvPOK_only_UTF8(sv) (assert_not_ROK(sv) \ 666 SvFLAGS(sv) &= ~(SVf_OK|SVf_AMAGIC| \ 667 SVf_IVisUV), \ 668 SvFLAGS(sv) |= (SVf_POK|SVp_POK)) 669 670 #define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK) 671 #define SvOOK_on(sv) ((void)SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK) 672 #define SvOOK_off(sv) ((void)(SvOOK(sv) && sv_backoff(sv))) 673 674 #define SvFAKE(sv) (SvFLAGS(sv) & SVf_FAKE) 675 #define SvFAKE_on(sv) (SvFLAGS(sv) |= SVf_FAKE) 676 #define SvFAKE_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE) 677 678 #define SvROK(sv) (SvFLAGS(sv) & SVf_ROK) 679 #define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK) 680 #define SvROK_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVf_AMAGIC)) 681 682 #define SvMAGICAL(sv) (SvFLAGS(sv) & (SVs_GMG|SVs_SMG|SVs_RMG)) 683 #define SvMAGICAL_on(sv) (SvFLAGS(sv) |= (SVs_GMG|SVs_SMG|SVs_RMG)) 684 #define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~(SVs_GMG|SVs_SMG|SVs_RMG)) 685 686 #define SvGMAGICAL(sv) (SvFLAGS(sv) & SVs_GMG) 687 #define SvGMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_GMG) 688 #define SvGMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_GMG) 689 690 #define SvSMAGICAL(sv) (SvFLAGS(sv) & SVs_SMG) 691 #define SvSMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_SMG) 692 #define SvSMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_SMG) 693 694 #define SvRMAGICAL(sv) (SvFLAGS(sv) & SVs_RMG) 695 #define SvRMAGICAL_on(sv) (SvFLAGS(sv) |= SVs_RMG) 696 #define SvRMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVs_RMG) 697 698 #define SvAMAGIC(sv) (SvFLAGS(sv) & SVf_AMAGIC) 699 #define SvAMAGIC_on(sv) (SvFLAGS(sv) |= SVf_AMAGIC) 700 #define SvAMAGIC_off(sv) (SvFLAGS(sv) &= ~SVf_AMAGIC) 701 702 #define SvGAMAGIC(sv) (SvFLAGS(sv) & (SVs_GMG|SVf_AMAGIC)) 703 704 /* 705 #define Gv_AMG(stash) \ 706 (HV_AMAGICmb(stash) && \ 707 ((!HV_AMAGICbad(stash) && HV_AMAGIC(stash)) || Gv_AMupdate(stash))) 708 */ 709 #define Gv_AMG(stash) (PL_amagic_generation && Gv_AMupdate(stash)) 710 711 #define SvWEAKREF(sv) ((SvFLAGS(sv) & (SVf_ROK|SVprv_WEAKREF)) \ 712 == (SVf_ROK|SVprv_WEAKREF)) 713 #define SvWEAKREF_on(sv) (SvFLAGS(sv) |= (SVf_ROK|SVprv_WEAKREF)) 714 #define SvWEAKREF_off(sv) (SvFLAGS(sv) &= ~(SVf_ROK|SVprv_WEAKREF)) 715 716 #define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST) 717 718 #define SvPADBUSY(sv) (SvFLAGS(sv) & SVs_PADBUSY) 719 720 #define SvPADTMP(sv) (SvFLAGS(sv) & SVs_PADTMP) 721 #define SvPADTMP_on(sv) (SvFLAGS(sv) |= SVs_PADTMP|SVs_PADBUSY) 722 #define SvPADTMP_off(sv) (SvFLAGS(sv) &= ~SVs_PADTMP) 723 724 #define SvPADMY(sv) (SvFLAGS(sv) & SVs_PADMY) 725 #define SvPADMY_on(sv) (SvFLAGS(sv) |= SVs_PADMY|SVs_PADBUSY) 726 727 #define SvTEMP(sv) (SvFLAGS(sv) & SVs_TEMP) 728 #define SvTEMP_on(sv) (SvFLAGS(sv) |= SVs_TEMP) 729 #define SvTEMP_off(sv) (SvFLAGS(sv) &= ~SVs_TEMP) 730 731 #define SvOBJECT(sv) (SvFLAGS(sv) & SVs_OBJECT) 732 #define SvOBJECT_on(sv) (SvFLAGS(sv) |= SVs_OBJECT) 733 #define SvOBJECT_off(sv) (SvFLAGS(sv) &= ~SVs_OBJECT) 734 735 #define SvREADONLY(sv) (SvFLAGS(sv) & SVf_READONLY) 736 #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY) 737 #define SvREADONLY_off(sv) (SvFLAGS(sv) &= ~SVf_READONLY) 738 739 #define SvSCREAM(sv) (SvFLAGS(sv) & SVp_SCREAM) 740 #define SvSCREAM_on(sv) (SvFLAGS(sv) |= SVp_SCREAM) 741 #define SvSCREAM_off(sv) (SvFLAGS(sv) &= ~SVp_SCREAM) 742 743 #define SvCOMPILED(sv) (SvFLAGS(sv) & SVpfm_COMPILED) 744 #define SvCOMPILED_on(sv) (SvFLAGS(sv) |= SVpfm_COMPILED) 745 #define SvCOMPILED_off(sv) (SvFLAGS(sv) &= ~SVpfm_COMPILED) 746 747 #define SvEVALED(sv) (SvFLAGS(sv) & SVrepl_EVAL) 748 #define SvEVALED_on(sv) (SvFLAGS(sv) |= SVrepl_EVAL) 749 #define SvEVALED_off(sv) (SvFLAGS(sv) &= ~SVrepl_EVAL) 750 751 #define SvTAIL(sv) (SvFLAGS(sv) & SVpbm_TAIL) 752 #define SvTAIL_on(sv) (SvFLAGS(sv) |= SVpbm_TAIL) 753 #define SvTAIL_off(sv) (SvFLAGS(sv) &= ~SVpbm_TAIL) 754 755 #define SvVALID(sv) (SvFLAGS(sv) & SVpbm_VALID) 756 #define SvVALID_on(sv) (SvFLAGS(sv) |= SVpbm_VALID) 757 #define SvVALID_off(sv) (SvFLAGS(sv) &= ~SVpbm_VALID) 758 759 #ifdef USE_ITHREADS 760 /* The following uses the FAKE flag to show that a regex pointer is infact 761 its own offset in the regexpad for ithreads */ 762 #define SvREPADTMP(sv) (SvFLAGS(sv) & SVf_FAKE) 763 #define SvREPADTMP_on(sv) (SvFLAGS(sv) |= SVf_FAKE) 764 #define SvREPADTMP_off(sv) (SvFLAGS(sv) &= ~SVf_FAKE) 765 #endif 766 767 #define SvRV(sv) ((XRV*) SvANY(sv))->xrv_rv 768 #define SvRVx(sv) SvRV(sv) 769 770 #define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv 771 #define SvUVX(sv) ((XPVUV*) SvANY(sv))->xuv_uv 772 #define SvNVX(sv) ((XPVNV*)SvANY(sv))->xnv_nv 773 #define SvPVX(sv) ((XPV*) SvANY(sv))->xpv_pv 774 /* Given that these two are new, there can't be any existing code using them 775 * as LVALUEs */ 776 #define SvPVX_mutable(sv) (0 + SvPVX(sv)) 777 #define SvPVX_const(sv) ((const char*) (0 + SvPVX(sv))) 778 #define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur 779 #define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len 780 #define SvEND(sv)(((XPV*) SvANY(sv))->xpv_pv + ((XPV*)SvANY(sv))->xpv_cur) 781 782 #define SvIVXx(sv) SvIVX(sv) 783 #define SvUVXx(sv) SvUVX(sv) 784 #define SvNVXx(sv) SvNVX(sv) 785 #define SvPVXx(sv) SvPVX(sv) 786 #define SvLENx(sv) SvLEN(sv) 787 #define SvENDx(sv) ((PL_Sv = (sv)), SvEND(PL_Sv)) 788 #define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic 789 #define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash 790 791 /* Ask a scalar nicely to try to become an IV, if possible. 792 Not guaranteed to stay returning void */ 793 /* Macro won't actually call sv_2iv if already IOK */ 794 #define SvIV_please(sv) \ 795 STMT_START {if (!SvIOKp(sv) && (SvNOK(sv) || SvPOK(sv))) \ 796 (void) SvIV(sv); } STMT_END 797 /* Put the asserts back at some point and figure out where they reveal bugs 798 */ 799 #define SvIV_set(sv, val) \ 800 STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \ 801 (((XPVIV*) SvANY(sv))->xiv_iv = (val)); } STMT_END 802 #define SvNV_set(sv, val) \ 803 STMT_START { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \ 804 (((XPVNV*)SvANY(sv))->xnv_nv = (val)); } STMT_END 805 /* assert(SvTYPE(sv) >= SVt_PV); */ 806 #define SvPV_set(sv, val) \ 807 STMT_START { \ 808 (((XPV*) SvANY(sv))->xpv_pv = (val)); } STMT_END 809 /* assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); */ 810 #define SvUV_set(sv, val) \ 811 STMT_START { \ 812 (((XPVUV*)SvANY(sv))->xuv_uv = (val)); } STMT_END 813 /* assert(SvTYPE(sv) >= SVt_RV); */ 814 #define SvRV_set(sv, val) \ 815 STMT_START { \ 816 (((XRV*)SvANY(sv))->xrv_rv = (val)); } STMT_END 817 /* assert(SvTYPE(sv) >= SVt_PVMG); */ 818 #define SvMAGIC_set(sv, val) \ 819 STMT_START { \ 820 (((XPVMG*)SvANY(sv))->xmg_magic = (val)); } STMT_END 821 /* assert(SvTYPE(sv) >= SVt_PVMG); */ 822 #define SvSTASH_set(sv, val) \ 823 STMT_START { \ 824 (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END 825 /* assert(SvTYPE(sv) >= SVt_PV); */ 826 #define SvCUR_set(sv, val) \ 827 STMT_START { \ 828 (((XPV*) SvANY(sv))->xpv_cur = (val)); } STMT_END 829 /* assert(SvTYPE(sv) >= SVt_PV); */ 830 #define SvLEN_set(sv, val) \ 831 STMT_START { \ 832 (((XPV*) SvANY(sv))->xpv_len = (val)); } STMT_END 833 #define SvEND_set(sv, val) \ 834 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \ 835 (SvCUR(sv) = (val) - SvPVX(sv)); } STMT_END 836 837 #define SvPV_renew(sv,n) \ 838 STMT_START { SvLEN_set(sv, n); \ 839 SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \ 840 (char*)saferealloc((Malloc_t)SvPVX(sv), \ 841 (MEM_SIZE)((n))))); \ 842 } STMT_END 843 844 #define SvPV_shrink_to_cur(sv) STMT_START { \ 845 const STRLEN _lEnGtH = SvCUR(sv) + 1; \ 846 SvPV_renew(sv, _lEnGtH); \ 847 } STMT_END 848 849 #define SvPV_free(sv) \ 850 STMT_START { assert(SvTYPE(sv) >= SVt_PV); \ 851 if (SvLEN(sv)) { \ 852 if(SvOOK(sv)) { \ 853 Safefree(SvPVX(sv) - SvIVX(sv)); \ 854 SvFLAGS(sv) &= ~SVf_OOK; \ 855 } else { \ 856 Safefree(SvPVX(sv)); \ 857 } \ 858 } \ 859 } STMT_END 860 861 #define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare 862 #define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful 863 #define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous 864 865 #define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines 866 867 #define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type 868 #define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ 869 #define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff 870 #define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen 871 872 #define IoIFP(sv) ((XPVIO*) SvANY(sv))->xio_ifp 873 #define IoOFP(sv) ((XPVIO*) SvANY(sv))->xio_ofp 874 #define IoDIRP(sv) ((XPVIO*) SvANY(sv))->xio_dirp 875 #define IoANY(sv) ((XPVIO*) SvANY(sv))->xio_any 876 #define IoLINES(sv) ((XPVIO*) SvANY(sv))->xio_lines 877 #define IoPAGE(sv) ((XPVIO*) SvANY(sv))->xio_page 878 #define IoPAGE_LEN(sv) ((XPVIO*) SvANY(sv))->xio_page_len 879 #define IoLINES_LEFT(sv)((XPVIO*) SvANY(sv))->xio_lines_left 880 #define IoTOP_NAME(sv) ((XPVIO*) SvANY(sv))->xio_top_name 881 #define IoTOP_GV(sv) ((XPVIO*) SvANY(sv))->xio_top_gv 882 #define IoFMT_NAME(sv) ((XPVIO*) SvANY(sv))->xio_fmt_name 883 #define IoFMT_GV(sv) ((XPVIO*) SvANY(sv))->xio_fmt_gv 884 #define IoBOTTOM_NAME(sv)((XPVIO*) SvANY(sv))->xio_bottom_name 885 #define IoBOTTOM_GV(sv) ((XPVIO*) SvANY(sv))->xio_bottom_gv 886 #define IoSUBPROCESS(sv)((XPVIO*) SvANY(sv))->xio_subprocess 887 #define IoTYPE(sv) ((XPVIO*) SvANY(sv))->xio_type 888 #define IoFLAGS(sv) ((XPVIO*) SvANY(sv))->xio_flags 889 890 /* IoTYPE(sv) is a single character telling the type of I/O connection. */ 891 #define IoTYPE_RDONLY '<' 892 #define IoTYPE_WRONLY '>' 893 #define IoTYPE_RDWR '+' 894 #define IoTYPE_APPEND 'a' 895 #define IoTYPE_PIPE '|' 896 #define IoTYPE_STD '-' /* stdin or stdout */ 897 #define IoTYPE_SOCKET 's' 898 #define IoTYPE_CLOSED ' ' 899 #define IoTYPE_IMPLICIT 'I' /* stdin or stdout or stderr */ 900 #define IoTYPE_NUMERIC '#' /* fdopen */ 901 902 /* 903 =for apidoc Am|bool|SvTAINTED|SV* sv 904 Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if 905 not. 906 907 =for apidoc Am|void|SvTAINTED_on|SV* sv 908 Marks an SV as tainted if tainting is enabled. 909 910 =for apidoc Am|void|SvTAINTED_off|SV* sv 911 Untaints an SV. Be I<very> careful with this routine, as it short-circuits 912 some of Perl's fundamental security features. XS module authors should not 913 use this function unless they fully understand all the implications of 914 unconditionally untainting the value. Untainting should be done in the 915 standard perl fashion, via a carefully crafted regexp, rather than directly 916 untainting variables. 917 918 =for apidoc Am|void|SvTAINT|SV* sv 919 Taints an SV if tainting is enabled. 920 921 =cut 922 */ 923 924 #define SvTAINTED(sv) (SvMAGICAL(sv) && sv_tainted(sv)) 925 #define SvTAINTED_on(sv) STMT_START{ if(PL_tainting){sv_taint(sv);} }STMT_END 926 #define SvTAINTED_off(sv) STMT_START{ if(PL_tainting){sv_untaint(sv);} }STMT_END 927 928 #define SvTAINT(sv) \ 929 STMT_START { \ 930 if (PL_tainting) { \ 931 if (PL_tainted) \ 932 SvTAINTED_on(sv); \ 933 } \ 934 } STMT_END 935 936 /* 937 =for apidoc Am|char*|SvPV_force|SV* sv|STRLEN len 938 Like C<SvPV> but will force the SV into containing just a string 939 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX> 940 directly. 941 942 =for apidoc Am|char*|SvPV_force_nomg|SV* sv|STRLEN len 943 Like C<SvPV> but will force the SV into containing just a string 944 (C<SvPOK_only>). You want force if you are going to update the C<SvPVX> 945 directly. Doesn't process magic. 946 947 =for apidoc Am|char*|SvPV|SV* sv|STRLEN len 948 Returns a pointer to the string in the SV, or a stringified form of 949 the SV if the SV does not contain a string. The SV may cache the 950 stringified version becoming C<SvPOK>. Handles 'get' magic. See also 951 C<SvPVx> for a version which guarantees to evaluate sv only once. 952 953 =for apidoc Am|char*|SvPVx|SV* sv|STRLEN len 954 A version of C<SvPV> which guarantees to evaluate sv only once. 955 956 =for apidoc Am|char*|SvPV_nolen|SV* sv 957 Returns a pointer to the string in the SV, or a stringified form of 958 the SV if the SV does not contain a string. The SV may cache the 959 stringified form becoming C<SvPOK>. Handles 'get' magic. 960 961 =for apidoc Am|IV|SvIV|SV* sv 962 Coerces the given SV to an integer and returns it. See C<SvIVx> for a 963 version which guarantees to evaluate sv only once. 964 965 =for apidoc Am|IV|SvIVx|SV* sv 966 Coerces the given SV to an integer and returns it. Guarantees to evaluate 967 sv only once. Use the more efficient C<SvIV> otherwise. 968 969 =for apidoc Am|NV|SvNV|SV* sv 970 Coerce the given SV to a double and return it. See C<SvNVx> for a version 971 which guarantees to evaluate sv only once. 972 973 =for apidoc Am|NV|SvNVx|SV* sv 974 Coerces the given SV to a double and returns it. Guarantees to evaluate 975 sv only once. Use the more efficient C<SvNV> otherwise. 976 977 =for apidoc Am|UV|SvUV|SV* sv 978 Coerces the given SV to an unsigned integer and returns it. See C<SvUVx> 979 for a version which guarantees to evaluate sv only once. 980 981 =for apidoc Am|UV|SvUVx|SV* sv 982 Coerces the given SV to an unsigned integer and returns it. Guarantees to 983 evaluate sv only once. Use the more efficient C<SvUV> otherwise. 984 985 =for apidoc Am|bool|SvTRUE|SV* sv 986 Returns a boolean indicating whether Perl would evaluate the SV as true or 987 false, defined or undefined. Does not handle 'get' magic. 988 989 =for apidoc Am|char*|SvPVutf8_force|SV* sv|STRLEN len 990 Like C<SvPV_force>, but converts sv to utf8 first if necessary. 991 992 =for apidoc Am|char*|SvPVutf8|SV* sv|STRLEN len 993 Like C<SvPV>, but converts sv to utf8 first if necessary. 994 995 =for apidoc Am|char*|SvPVutf8_nolen|SV* sv 996 Like C<SvPV_nolen>, but converts sv to utf8 first if necessary. 997 998 =for apidoc Am|char*|SvPVbyte_force|SV* sv|STRLEN len 999 Like C<SvPV_force>, but converts sv to byte representation first if necessary. 1000 1001 =for apidoc Am|char*|SvPVbyte|SV* sv|STRLEN len 1002 Like C<SvPV>, but converts sv to byte representation first if necessary. 1003 1004 =for apidoc Am|char*|SvPVbyte_nolen|SV* sv 1005 Like C<SvPV_nolen>, but converts sv to byte representation first if necessary. 1006 1007 =for apidoc Am|char*|SvPVutf8x_force|SV* sv|STRLEN len 1008 Like C<SvPV_force>, but converts sv to utf8 first if necessary. 1009 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8_force> 1010 otherwise. 1011 1012 =for apidoc Am|char*|SvPVutf8x|SV* sv|STRLEN len 1013 Like C<SvPV>, but converts sv to utf8 first if necessary. 1014 Guarantees to evaluate sv only once; use the more efficient C<SvPVutf8> 1015 otherwise. 1016 1017 =for apidoc Am|char*|SvPVbytex_force|SV* sv|STRLEN len 1018 Like C<SvPV_force>, but converts sv to byte representation first if necessary. 1019 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte_force> 1020 otherwise. 1021 1022 =for apidoc Am|char*|SvPVbytex|SV* sv|STRLEN len 1023 Like C<SvPV>, but converts sv to byte representation first if necessary. 1024 Guarantees to evaluate sv only once; use the more efficient C<SvPVbyte> 1025 otherwise. 1026 1027 =for apidoc Am|bool|SvIsCOW|SV* sv 1028 Returns a boolean indicating whether the SV is Copy-On-Write. (either shared 1029 hash key scalars, or full Copy On Write scalars if 5.9.0 is configured for 1030 COW) 1031 1032 =for apidoc Am|bool|SvIsCOW_shared_hash|SV* sv 1033 Returns a boolean indicating whether the SV is Copy-On-Write shared hash key 1034 scalar. 1035 1036 =for apidoc Am|void|sv_catpvn_nomg|SV* sv|const char* ptr|STRLEN len 1037 Like C<sv_catpvn> but doesn't process magic. 1038 1039 =for apidoc Am|void|sv_setsv_nomg|SV* dsv|SV* ssv 1040 Like C<sv_setsv> but doesn't process magic. 1041 1042 =for apidoc Am|void|sv_catsv_nomg|SV* dsv|SV* ssv 1043 Like C<sv_catsv> but doesn't process magic. 1044 1045 =cut 1046 */ 1047 1048 /* Let us hope that bitmaps for UV and IV are the same */ 1049 #define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) 1050 #define SvUV(sv) (SvIOK(sv) ? SvUVX(sv) : sv_2uv(sv)) 1051 #define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv)) 1052 1053 /* ----*/ 1054 1055 #define SvPV(sv, lp) SvPV_flags(sv, lp, SV_GMAGIC) 1056 #define SvPV_const(sv, lp) SvPV_flags_const(sv, lp, SV_GMAGIC) 1057 #define SvPV_mutable(sv, lp) SvPV_flags_mutable(sv, lp, SV_GMAGIC) 1058 1059 #define SvPV_flags(sv, lp, flags) \ 1060 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \ 1061 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv_flags(sv, &lp, flags)) 1062 #define SvPV_flags_const(sv, lp, flags) \ 1063 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \ 1064 ? ((lp = SvCUR(sv)), SvPVX_const(sv)) : \ 1065 (const char*) sv_2pv_flags(sv, &lp, flags|SV_CONST_RETURN)) 1066 #define SvPV_flags_const_nolen(sv, flags) \ 1067 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \ 1068 ? SvPVX_const(sv) : \ 1069 (const char*) sv_2pv_flags(sv, 0, flags|SV_CONST_RETURN)) 1070 #define SvPV_flags_mutable(sv, lp, flags) \ 1071 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \ 1072 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) : \ 1073 sv_2pv_flags(sv, &lp, flags|SV_MUTABLE_RETURN)) 1074 1075 #define SvPV_force(sv, lp) SvPV_force_flags(sv, lp, SV_GMAGIC) 1076 #define SvPV_force_nolen(sv) SvPV_force_flags_nolen(sv, SV_GMAGIC) 1077 #define SvPV_force_mutable(sv, lp) SvPV_force_flags_mutable(sv, lp, SV_GMAGIC) 1078 1079 #define SvPV_force_nomg(sv, lp) SvPV_force_flags(sv, lp, 0) 1080 #define SvPV_force_nomg_nolen(sv) SvPV_force_flags_nolen(sv, 0) 1081 1082 #define SvPV_force_flags(sv, lp, flags) \ 1083 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \ 1084 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvn_force_flags(sv, &lp, flags)) 1085 #define SvPV_force_flags_nolen(sv, flags) \ 1086 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \ 1087 ? SvPVX(sv) : sv_pvn_force_flags(sv, 0, flags)) 1088 #define SvPV_force_flags_mutable(sv, lp, flags) \ 1089 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == SVf_POK \ 1090 ? ((lp = SvCUR(sv)), SvPVX_mutable(sv)) \ 1091 : sv_pvn_force_flags(sv, &lp, flags|SV_MUTABLE_RETURN)) 1092 1093 #define SvPV_nolen(sv) \ 1094 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \ 1095 ? SvPVX(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC)) 1096 1097 #define SvPV_nolen_const(sv) \ 1098 ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \ 1099 ? SvPVX_const(sv) : sv_2pv_flags(sv, 0, SV_GMAGIC|SV_CONST_RETURN)) 1100 1101 #define SvPV_nomg(sv, lp) SvPV_flags(sv, lp, 0) 1102 #define SvPV_nomg_const(sv, lp) SvPV_flags_const(sv, lp, 0) 1103 #define SvPV_nomg_const_nolen(sv) SvPV_flags_const_nolen(sv, 0) 1104 1105 /* ----*/ 1106 1107 #define SvPVutf8(sv, lp) \ 1108 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8) \ 1109 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvutf8(sv, &lp)) 1110 1111 #define SvPVutf8_force(sv, lp) \ 1112 ((SvFLAGS(sv) & (SVf_POK|SVf_THINKFIRST)) == (SVf_POK|SVf_UTF8) \ 1113 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvutf8n_force(sv, &lp)) 1114 1115 1116 #define SvPVutf8_nolen(sv) \ 1117 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK|SVf_UTF8)\ 1118 ? SvPVX(sv) : sv_2pvutf8(sv, 0)) 1119 1120 /* ----*/ 1121 1122 #define SvPVbyte(sv, lp) \ 1123 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \ 1124 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pvbyte(sv, &lp)) 1125 1126 #define SvPVbyte_force(sv, lp) \ 1127 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8|SVf_THINKFIRST)) == (SVf_POK) \ 1128 ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_pvbyten_force(sv, &lp)) 1129 1130 #define SvPVbyte_nolen(sv) \ 1131 ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK)\ 1132 ? SvPVX(sv) : sv_2pvbyte(sv, 0)) 1133 1134 1135 1136 /* define FOOx(): idempotent versions of FOO(). If possible, use a local 1137 * var to evaluate the arg once; failing that, use a global if possible; 1138 * failing that, call a function to do the work 1139 */ 1140 1141 #define SvPVx_force(sv, lp) sv_pvn_force(sv, &lp) 1142 #define SvPVutf8x_force(sv, lp) sv_pvutf8n_force(sv, &lp) 1143 #define SvPVbytex_force(sv, lp) sv_pvbyten_force(sv, &lp) 1144 1145 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN) 1146 1147 # define SvIVx(sv) ({SV *_sv = (SV*)(sv); SvIV(_sv); }) 1148 # define SvUVx(sv) ({SV *_sv = (SV*)(sv); SvUV(_sv); }) 1149 # define SvNVx(sv) ({SV *_sv = (SV*)(sv); SvNV(_sv); }) 1150 # define SvPVx(sv, lp) ({SV *_sv = (sv); SvPV(_sv, lp); }) 1151 # define SvPVx_const(sv, lp) ({SV *_sv = (sv); SvPV_const(_sv, lp); }) 1152 # define SvPVx_nolen(sv) ({SV *_sv = (sv); SvPV_nolen(_sv); }) 1153 # define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); }) 1154 # define SvPVutf8x(sv, lp) ({SV *_sv = (sv); SvPVutf8(_sv, lp); }) 1155 # define SvPVbytex(sv, lp) ({SV *_sv = (sv); SvPVbyte(_sv, lp); }) 1156 # define SvPVbytex_nolen(sv) ({SV *_sv = (sv); SvPVbyte_nolen(_sv); }) 1157 # define SvTRUE(sv) ( \ 1158 !sv \ 1159 ? 0 \ 1160 : SvPOK(sv) \ 1161 ? (({XPV *nxpv = (XPV*)SvANY(sv); \ 1162 nxpv && \ 1163 (nxpv->xpv_cur > 1 || \ 1164 (nxpv->xpv_cur && *nxpv->xpv_pv != '0')); }) \ 1165 ? 1 \ 1166 : 0) \ 1167 : \ 1168 SvIOK(sv) \ 1169 ? SvIVX(sv) != 0 \ 1170 : SvNOK(sv) \ 1171 ? SvNVX(sv) != 0.0 \ 1172 : sv_2bool(sv) ) 1173 # define SvTRUEx(sv) ({SV *_sv = (sv); SvTRUE(_sv); }) 1174 1175 #else /* __GNUC__ */ 1176 1177 # ifdef USE_5005THREADS 1178 # define SvIVx(sv) sv_iv(sv) 1179 # define SvUVx(sv) sv_uv(sv) 1180 # define SvNVx(sv) sv_nv(sv) 1181 # define SvPVx(sv, lp) sv_pvn(sv, &lp) 1182 # define SvPVutf8x(sv, lp) sv_pvutf8n(sv, &lp) 1183 # define SvPVbytex(sv, lp) sv_pvbyten(sv, &lp) 1184 # define SvTRUE(sv) SvTRUEx(sv) 1185 # define SvTRUEx(sv) sv_true(sv) 1186 1187 # else /* USE_5005THREADS */ 1188 1189 /* These inlined macros use globals, which will require a thread 1190 * declaration in user code, so we avoid them under threads */ 1191 1192 # define SvIVx(sv) ((PL_Sv = (sv)), SvIV(PL_Sv)) 1193 # define SvUVx(sv) ((PL_Sv = (sv)), SvUV(PL_Sv)) 1194 # define SvNVx(sv) ((PL_Sv = (sv)), SvNV(PL_Sv)) 1195 # define SvPVx(sv, lp) ((PL_Sv = (sv)), SvPV(PL_Sv, lp)) 1196 # define SvPVx_const(sv, lp) ((PL_Sv = (sv)), SvPV_const(PL_Sv, lp)) 1197 # define SvPVx_nolen(sv) ((PL_Sv = (sv)), SvPV_nolen(PL_Sv)) 1198 # define SvPVx_nolen_const(sv) ((PL_Sv = (sv)), SvPV_nolen_const(PL_Sv)) 1199 # define SvPVutf8x(sv, lp) ((PL_Sv = (sv)), SvPVutf8(PL_Sv, lp)) 1200 # define SvPVbytex(sv, lp) ((PL_Sv = (sv)), SvPVbyte(PL_Sv, lp)) 1201 # define SvPVbytex_nolen(sv) ((PL_Sv = (sv)), SvPVbyte_nolen(PL_Sv)) 1202 # define SvTRUE(sv) ( \ 1203 !sv \ 1204 ? 0 \ 1205 : SvPOK(sv) \ 1206 ? ((PL_Xpv = (XPV*)SvANY(sv)) && \ 1207 (PL_Xpv->xpv_cur > 1 || \ 1208 (PL_Xpv->xpv_cur && *PL_Xpv->xpv_pv != '0')) \ 1209 ? 1 \ 1210 : 0) \ 1211 : \ 1212 SvIOK(sv) \ 1213 ? SvIVX(sv) != 0 \ 1214 : SvNOK(sv) \ 1215 ? SvNVX(sv) != 0.0 \ 1216 : sv_2bool(sv) ) 1217 # define SvTRUEx(sv) ((PL_Sv = (sv)), SvTRUE(PL_Sv)) 1218 # endif /* USE_5005THREADS */ 1219 #endif /* __GNU__ */ 1220 1221 #define SvIsCOW(sv) ((SvFLAGS(sv) & (SVf_FAKE | SVf_READONLY)) == \ 1222 (SVf_FAKE | SVf_READONLY)) 1223 #define SvIsCOW_shared_hash(sv) (SvIsCOW(sv) && SvLEN(sv) == 0) 1224 1225 #define SvSHARED_HASH(sv) (0 + SvUVX(sv)) 1226 1227 /* flag values for sv_*_flags functions */ 1228 #define SV_IMMEDIATE_UNREF 1 1229 #define SV_GMAGIC 2 1230 #define SV_COW_DROP_PV 4 /* Unused in Perl 5.8.x */ 1231 #define SV_UTF8_NO_ENCODING 8 1232 #define SV_NOSTEAL 16 1233 #define SV_CONST_RETURN 32 1234 #define SV_MUTABLE_RETURN 64 1235 1236 /* all these 'functions' are now just macros */ 1237 1238 #define sv_pv(sv) SvPV_nolen(sv) 1239 #define sv_pvutf8(sv) SvPVutf8_nolen(sv) 1240 #define sv_pvbyte(sv) SvPVbyte_nolen(sv) 1241 1242 #define sv_pvn_force_nomg(sv, lp) sv_pvn_force_flags(sv, lp, 0) 1243 #define sv_utf8_upgrade_nomg(sv) sv_utf8_upgrade_flags(sv, 0) 1244 #define sv_catpvn_nomg(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, 0) 1245 #define sv_setsv(dsv, ssv) sv_setsv_flags(dsv, ssv, SV_GMAGIC) 1246 #define sv_setsv_nomg(dsv, ssv) sv_setsv_flags(dsv, ssv, 0) 1247 #define sv_catsv(dsv, ssv) sv_catsv_flags(dsv, ssv, SV_GMAGIC) 1248 #define sv_catsv_nomg(dsv, ssv) sv_catsv_flags(dsv, ssv, 0) 1249 #define sv_catpvn(dsv, sstr, slen) sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC) 1250 #define sv_2pv(sv, lp) sv_2pv_flags(sv, lp, SV_GMAGIC) 1251 #define sv_2pv_nomg(sv, lp) sv_2pv_flags(sv, lp, 0) 1252 #define sv_pvn_force(sv, lp) sv_pvn_force_flags(sv, lp, SV_GMAGIC) 1253 #define sv_utf8_upgrade(sv) sv_utf8_upgrade_flags(sv, SV_GMAGIC) 1254 1255 /* Should be named SvCatPVN_utf8_upgrade? */ 1256 #define sv_catpvn_utf8_upgrade(dsv, sstr, slen, nsv) \ 1257 STMT_START { \ 1258 if (!(nsv)) \ 1259 nsv = sv_2mortal(newSVpvn(sstr, slen)); \ 1260 else \ 1261 sv_setpvn(nsv, sstr, slen); \ 1262 SvUTF8_off(nsv); \ 1263 sv_utf8_upgrade(nsv); \ 1264 sv_catsv(dsv, nsv); \ 1265 } STMT_END 1266 1267 /* 1268 =for apidoc Am|SV*|newRV_inc|SV* sv 1269 1270 Creates an RV wrapper for an SV. The reference count for the original SV is 1271 incremented. 1272 1273 =cut 1274 */ 1275 1276 #define newRV_inc(sv) newRV(sv) 1277 1278 /* the following macros update any magic values this sv is associated with */ 1279 1280 /* 1281 =head1 Magical Functions 1282 1283 =for apidoc Am|void|SvGETMAGIC|SV* sv 1284 Invokes C<mg_get> on an SV if it has 'get' magic. This macro evaluates its 1285 argument more than once. 1286 1287 =for apidoc Am|void|SvSETMAGIC|SV* sv 1288 Invokes C<mg_set> on an SV if it has 'set' magic. This macro evaluates its 1289 argument more than once. 1290 1291 =for apidoc Am|void|SvSetSV|SV* dsb|SV* ssv 1292 Calls C<sv_setsv> if dsv is not the same as ssv. May evaluate arguments 1293 more than once. 1294 1295 =for apidoc Am|void|SvSetSV_nosteal|SV* dsv|SV* ssv 1296 Calls a non-destructive version of C<sv_setsv> if dsv is not the same as 1297 ssv. May evaluate arguments more than once. 1298 1299 =for apidoc Am|void|SvSetMagicSV|SV* dsb|SV* ssv 1300 Like C<SvSetSV>, but does any set magic required afterwards. 1301 1302 =for apidoc Am|void|SvSetMagicSV_nosteal|SV* dsv|SV* ssv 1303 Like C<SvSetSV_nosteal>, but does any set magic required afterwards. 1304 1305 =for apidoc Am|void|SvSHARE|SV* sv 1306 Arranges for sv to be shared between threads if a suitable module 1307 has been loaded. 1308 1309 =for apidoc Am|void|SvLOCK|SV* sv 1310 Arranges for a mutual exclusion lock to be obtained on sv if a suitable module 1311 has been loaded. 1312 1313 =for apidoc Am|void|SvUNLOCK|SV* sv 1314 Releases a mutual exclusion lock on sv if a suitable module 1315 has been loaded. 1316 1317 =head1 SV Manipulation Functions 1318 1319 =for apidoc Am|char *|SvGROW|SV* sv|STRLEN len 1320 Expands the character buffer in the SV so that it has room for the 1321 indicated number of bytes (remember to reserve space for an extra trailing 1322 NUL character). Calls C<sv_grow> to perform the expansion if necessary. 1323 Returns a pointer to the character buffer. 1324 1325 =cut 1326 */ 1327 1328 #define SvSHARE(sv) CALL_FPTR(PL_sharehook)(aTHX_ sv) 1329 #define SvLOCK(sv) CALL_FPTR(PL_lockhook)(aTHX_ sv) 1330 #define SvUNLOCK(sv) CALL_FPTR(PL_unlockhook)(aTHX_ sv) 1331 1332 #define SvGETMAGIC(x) STMT_START { if (SvGMAGICAL(x)) mg_get(x); } STMT_END 1333 #define SvSETMAGIC(x) STMT_START { if (SvSMAGICAL(x)) mg_set(x); } STMT_END 1334 1335 #define SvSetSV_and(dst,src,finally) \ 1336 STMT_START { \ 1337 if ((dst) != (src)) { \ 1338 sv_setsv(dst, src); \ 1339 finally; \ 1340 } \ 1341 } STMT_END 1342 #define SvSetSV_nosteal_and(dst,src,finally) \ 1343 STMT_START { \ 1344 if ((dst) != (src)) { \ 1345 sv_setsv_flags(dst, src, SV_GMAGIC | SV_NOSTEAL); \ 1346 finally; \ 1347 } \ 1348 } STMT_END 1349 1350 #define SvSetSV(dst,src) \ 1351 SvSetSV_and(dst,src,/*nothing*/;) 1352 #define SvSetSV_nosteal(dst,src) \ 1353 SvSetSV_nosteal_and(dst,src,/*nothing*/;) 1354 1355 #define SvSetMagicSV(dst,src) \ 1356 SvSetSV_and(dst,src,SvSETMAGIC(dst)) 1357 #define SvSetMagicSV_nosteal(dst,src) \ 1358 SvSetSV_nosteal_and(dst,src,SvSETMAGIC(dst)) 1359 1360 1361 #if !defined(SKIP_DEBUGGING) 1362 #define SvPEEK(sv) sv_peek(sv) 1363 #else 1364 #define SvPEEK(sv) "" 1365 #endif 1366 1367 #define SvIMMORTAL(sv) ((sv)==&PL_sv_undef || (sv)==&PL_sv_yes || (sv)==&PL_sv_no || (sv)==&PL_sv_placeholder) 1368 1369 #define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no) 1370 1371 #define isGV(sv) (SvTYPE(sv) == SVt_PVGV) 1372 1373 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv)) 1374 #define SvGROW_mutable(sv,len) \ 1375 (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX_mutable(sv)) 1376 #define Sv_Grow sv_grow 1377 1378 #define CLONEf_COPY_STACKS 1 1379 #define CLONEf_KEEP_PTR_TABLE 2 1380 #define CLONEf_CLONE_HOST 4 1381 #define CLONEf_JOIN_IN 8 1382 1383 struct clone_params { 1384 AV* stashes; 1385 UV flags; 1386 PerlInterpreter *proto_perl; 1387 }; 1388 1389 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) sv_force_normal(sv) 1390