1 /* op.h 2 * 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 4 * 2000, 2001, 2002, 2003, 2004, 2005 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 /* 12 * The fields of BASEOP are: 13 * op_next Pointer to next ppcode to execute after this one. 14 * (Top level pre-grafted op points to first op, 15 * but this is replaced when op is grafted in, when 16 * this op will point to the real next op, and the new 17 * parent takes over role of remembering starting op.) 18 * op_ppaddr Pointer to current ppcode's function. 19 * op_type The type of the operation. 20 * op_flags Flags common to all operations. See OPf_* below. 21 * op_private Flags peculiar to a particular operation (BUT, 22 * by default, set to the number of children until 23 * the operation is privatized by a check routine, 24 * which may or may not check number of children). 25 */ 26 27 #ifdef DEBUGGING_OPS 28 #define OPCODE opcode 29 #else 30 #define OPCODE U16 31 #endif 32 33 #ifdef BASEOP_DEFINITION 34 #define BASEOP BASEOP_DEFINITION 35 #else 36 #define BASEOP \ 37 OP* op_next; \ 38 OP* op_sibling; \ 39 OP* (CPERLscope(*op_ppaddr))(pTHX); \ 40 PADOFFSET op_targ; \ 41 OPCODE op_type; \ 42 U16 op_seq; \ 43 U8 op_flags; \ 44 U8 op_private; 45 #endif 46 47 #define OP_GIMME(op,dfl) \ 48 (((op)->op_flags & OPf_WANT) == OPf_WANT_VOID ? G_VOID : \ 49 ((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \ 50 ((op)->op_flags & OPf_WANT) == OPf_WANT_LIST ? G_ARRAY : \ 51 dfl) 52 53 /* 54 =head1 "Gimme" Values 55 56 =for apidoc Amn|U32|GIMME_V 57 The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>, 58 C<G_SCALAR> or C<G_ARRAY> for void, scalar or list context, 59 respectively. 60 61 =for apidoc Amn|U32|GIMME 62 A backward-compatible version of C<GIMME_V> which can only return 63 C<G_SCALAR> or C<G_ARRAY>; in a void context, it returns C<G_SCALAR>. 64 Deprecated. Use C<GIMME_V> instead. 65 66 =cut 67 */ 68 69 #define GIMME_V OP_GIMME(PL_op, block_gimme()) 70 71 /* Public flags */ 72 73 #define OPf_WANT 3 /* Mask for "want" bits: */ 74 #define OPf_WANT_VOID 1 /* Want nothing */ 75 #define OPf_WANT_SCALAR 2 /* Want single value */ 76 #define OPf_WANT_LIST 3 /* Want list of any length */ 77 #define OPf_KIDS 4 /* There is a firstborn child. */ 78 #define OPf_PARENS 8 /* This operator was parenthesized. */ 79 /* (Or block needs explicit scope entry.) */ 80 #define OPf_REF 16 /* Certified reference. */ 81 /* (Return container, not containee). */ 82 #define OPf_MOD 32 /* Will modify (lvalue). */ 83 #define OPf_STACKED 64 /* Some arg is arriving on the stack. */ 84 #define OPf_SPECIAL 128 /* Do something weird for this op: */ 85 /* On local LVAL, don't init local value. */ 86 /* On OP_SORT, subroutine is inlined. */ 87 /* On OP_NOT, inversion was implicit. */ 88 /* On OP_LEAVE, don't restore curpm. */ 89 /* On truncate, we truncate filehandle */ 90 /* On control verbs, we saw no label */ 91 /* On flipflop, we saw ... instead of .. */ 92 /* On UNOPs, saw bare parens, e.g. eof(). */ 93 /* On OP_ENTERSUB || OP_NULL, saw a "do". */ 94 /* On OP_EXISTS, treat av as av, not avhv. */ 95 /* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */ 96 /* On OP_ENTERITER, loop var is per-thread */ 97 /* On pushre, re is /\s+/ imp. by split " " */ 98 /* On regcomp, "use re 'eval'" was in scope */ 99 /* On OP_READLINE, was <$filehandle> */ 100 /* On RV2[ACGHS]V, don't create GV--in 101 defined()*/ 102 /* On OP_DBSTATE, indicates breakpoint 103 * (runtime property) */ 104 /* On OP_AELEMFAST, indiciates pad var */ 105 106 /* old names; don't use in new code, but don't break them, either */ 107 #define OPf_LIST OPf_WANT_LIST 108 #define OPf_KNOW OPf_WANT 109 110 #define GIMME \ 111 (PL_op->op_flags & OPf_WANT \ 112 ? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \ 113 ? G_ARRAY \ 114 : G_SCALAR) \ 115 : dowantarray()) 116 117 /* NOTE: OP_NEXTSTATE, OP_DBSTATE, and OP_SETSTATE (i.e. COPs) carry lower 118 * bits of PL_hints in op_private */ 119 120 /* Private for lvalues */ 121 #define OPpLVAL_INTRO 128 /* Lvalue must be localized or lvalue sub */ 122 123 /* Private for OP_LEAVE, OP_LEAVESUB, OP_LEAVESUBLV and OP_LEAVEWRITE */ 124 #define OPpREFCOUNTED 64 /* op_targ carries a refcount */ 125 126 /* Private for OP_AASSIGN */ 127 #define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */ 128 #define OPpASSIGN_HASH 32 /* Assigning to possible pseudohash. */ 129 130 /* Private for OP_SASSIGN */ 131 #define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */ 132 133 /* Private for OP_MATCH and OP_SUBST{,CONST} */ 134 #define OPpRUNTIME 64 /* Pattern coming in on the stack */ 135 136 /* Private for OP_TRANS */ 137 #define OPpTRANS_FROM_UTF 1 138 #define OPpTRANS_TO_UTF 2 139 #define OPpTRANS_IDENTICAL 4 /* right side is same as left */ 140 #define OPpTRANS_SQUASH 8 141 #define OPpTRANS_DELETE 16 142 #define OPpTRANS_COMPLEMENT 32 143 #define OPpTRANS_GROWS 64 144 145 /* Private for OP_REPEAT */ 146 #define OPpREPEAT_DOLIST 64 /* List replication. */ 147 148 /* Private for OP_RV2GV, OP_RV2SV, OP_AELEM, OP_HELEM, OP_PADSV */ 149 #define OPpDEREF (32|64) /* autovivify: Want ref to something: */ 150 #define OPpDEREF_AV 32 /* Want ref to AV. */ 151 #define OPpDEREF_HV 64 /* Want ref to HV. */ 152 #define OPpDEREF_SV (32|64) /* Want ref to SV. */ 153 /* OP_ENTERSUB only */ 154 #define OPpENTERSUB_DB 16 /* Debug subroutine. */ 155 #define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */ 156 #define OPpENTERSUB_NOMOD 64 /* Immune to mod() for :attrlist. */ 157 /* OP_RV2CV only */ 158 #define OPpENTERSUB_AMPER 8 /* Used & form to call. */ 159 #define OPpENTERSUB_NOPAREN 128 /* bare sub call (without parens) */ 160 #define OPpENTERSUB_INARGS 4 /* Lval used as arg to a sub. */ 161 /* OP_GV only */ 162 #define OPpEARLY_CV 32 /* foo() called before sub foo was parsed */ 163 /* OP_?ELEM only */ 164 #define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */ 165 /* OP_RV2?V, OP_GVSV, OP_ENTERITER only */ 166 #define OPpOUR_INTRO 16 /* Variable was in an our() */ 167 /* OP_RV2[AH]V, OP_PAD[AH]V, OP_[AH]ELEM */ 168 #define OPpMAYBE_LVSUB 8 /* We might be an lvalue to return */ 169 /* for OP_RV2?V, lower bits carry hints (currently only HINT_STRICT_REFS) */ 170 171 /* Private for OPs with TARGLEX */ 172 /* (lower bits may carry MAXARG) */ 173 #define OPpTARGET_MY 16 /* Target is PADMY. */ 174 175 /* Private for OP_ENTERITER and OP_ITER */ 176 #define OPpITER_REVERSED 4 /* for (reverse ...) */ 177 178 /* Private for OP_CONST */ 179 #define OPpCONST_SHORTCIRCUIT 4 /* eg the constant 5 in (5 || foo) */ 180 #define OPpCONST_STRICT 8 /* bearword subject to strict 'subs' */ 181 #define OPpCONST_ENTERED 16 /* Has been entered as symbol. */ 182 #define OPpCONST_ARYBASE 32 /* Was a $[ translated to constant. */ 183 #define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */ 184 #define OPpCONST_WARNING 128 /* Was a $^W translated to constant. */ 185 186 /* Private for OP_FLIP/FLOP */ 187 #define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */ 188 189 /* Private for OP_LIST */ 190 #define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */ 191 192 /* Private for OP_DELETE */ 193 #define OPpSLICE 64 /* Operating on a list of keys */ 194 195 /* Private for OP_EXISTS */ 196 #define OPpEXISTS_SUB 64 /* Checking for &sub, not {} or []. */ 197 198 /* Private for OP_SORT */ 199 #define OPpSORT_NUMERIC 1 /* Optimized away { $a <=> $b } */ 200 #define OPpSORT_INTEGER 2 /* Ditto while under "use integer" */ 201 #define OPpSORT_REVERSE 4 /* Reversed sort */ 202 #define OPpSORT_INPLACE 8 /* sort in-place; eg @a = sort @a */ 203 #define OPpSORT_DESCEND 16 /* Descending sort */ 204 /* Private for OP_THREADSV */ 205 #define OPpDONE_SVREF 64 /* Been through newSVREF once */ 206 207 /* Private for OP_OPEN and OP_BACKTICK */ 208 #define OPpOPEN_IN_RAW 16 /* binmode(F,":raw") on input fh */ 209 #define OPpOPEN_IN_CRLF 32 /* binmode(F,":crlf") on input fh */ 210 #define OPpOPEN_OUT_RAW 64 /* binmode(F,":raw") on output fh */ 211 #define OPpOPEN_OUT_CRLF 128 /* binmode(F,":crlf") on output fh */ 212 213 /* Private for OP_EXIT, HUSH also for OP_DIE */ 214 #define OPpHUSH_VMSISH 64 /* hush DCL exit msg vmsish mode*/ 215 #define OPpEXIT_VMSISH 128 /* exit(0) vs. exit(1) vmsish mode*/ 216 217 /* Private of OP_FTXXX */ 218 #define OPpFT_ACCESS 2 /* use filetest 'access' */ 219 #define OP_IS_FILETEST_ACCESS(op) \ 220 (((op)->op_type) == OP_FTRREAD || \ 221 ((op)->op_type) == OP_FTRWRITE || \ 222 ((op)->op_type) == OP_FTREXEC || \ 223 ((op)->op_type) == OP_FTEREAD || \ 224 ((op)->op_type) == OP_FTEWRITE || \ 225 ((op)->op_type) == OP_FTEEXEC) 226 227 struct op { 228 BASEOP 229 }; 230 231 struct unop { 232 BASEOP 233 OP * op_first; 234 }; 235 236 struct binop { 237 BASEOP 238 OP * op_first; 239 OP * op_last; 240 }; 241 242 struct logop { 243 BASEOP 244 OP * op_first; 245 OP * op_other; 246 }; 247 248 struct listop { 249 BASEOP 250 OP * op_first; 251 OP * op_last; 252 }; 253 254 struct pmop { 255 BASEOP 256 OP * op_first; 257 OP * op_last; 258 OP * op_pmreplroot; /* (type is really union {OP*,GV*,PADOFFSET}) */ 259 OP * op_pmreplstart; 260 PMOP * op_pmnext; /* list of all scanpats */ 261 #ifdef USE_ITHREADS 262 IV op_pmoffset; 263 #else 264 REGEXP * op_pmregexp; /* compiled expression */ 265 #endif 266 U32 op_pmflags; 267 U32 op_pmpermflags; 268 U8 op_pmdynflags; 269 #ifdef USE_ITHREADS 270 char * op_pmstashpv; 271 #else 272 HV * op_pmstash; 273 #endif 274 }; 275 276 #ifdef USE_ITHREADS 277 #define PM_GETRE(o) (INT2PTR(REGEXP*,SvIVX(PL_regex_pad[(o)->op_pmoffset]))) 278 #define PM_SETRE(o,r) STMT_START { SV* sv = PL_regex_pad[(o)->op_pmoffset]; sv_setiv(sv, PTR2IV(r)); } STMT_END 279 #define PM_GETRE_SAFE(o) (PL_regex_pad ? PM_GETRE(o) : (REGEXP*)0) 280 #define PM_SETRE_SAFE(o,r) if (PL_regex_pad) PM_SETRE(o,r) 281 #else 282 #define PM_GETRE(o) ((o)->op_pmregexp) 283 #define PM_SETRE(o,r) ((o)->op_pmregexp = (r)) 284 #define PM_GETRE_SAFE PM_GETRE 285 #define PM_SETRE_SAFE PM_SETRE 286 #endif 287 288 #define PMdf_USED 0x01 /* pm has been used once already */ 289 #define PMdf_TAINTED 0x02 /* pm compiled from tainted pattern */ 290 #define PMdf_UTF8 0x04 /* pm compiled from utf8 data */ 291 #define PMdf_DYN_UTF8 0x08 292 293 #define PMdf_CMP_UTF8 (PMdf_UTF8|PMdf_DYN_UTF8) 294 295 #define PMf_RETAINT 0x0001 /* taint $1 etc. if target tainted */ 296 #define PMf_ONCE 0x0002 /* use pattern only once per reset */ 297 #define PMf_UNUSED 0x0004 /* free for use */ 298 #define PMf_MAYBE_CONST 0x0008 /* replacement contains variables */ 299 #define PMf_SKIPWHITE 0x0010 /* skip leading whitespace for split */ 300 #define PMf_WHITE 0x0020 /* pattern is \s+ */ 301 #define PMf_CONST 0x0040 /* subst replacement is constant */ 302 #define PMf_KEEP 0x0080 /* keep 1st runtime pattern forever */ 303 #define PMf_GLOBAL 0x0100 /* pattern had a g modifier */ 304 #define PMf_CONTINUE 0x0200 /* don't reset pos() if //g fails */ 305 #define PMf_EVAL 0x0400 /* evaluating replacement as expr */ 306 #define PMf_LOCALE 0x0800 /* use locale for character types */ 307 #define PMf_MULTILINE 0x1000 /* assume multiple lines */ 308 #define PMf_SINGLELINE 0x2000 /* assume single line */ 309 #define PMf_FOLD 0x4000 /* case insensitivity */ 310 #define PMf_EXTENDED 0x8000 /* chuck embedded whitespace */ 311 312 /* mask of bits stored in regexp->reganch */ 313 #define PMf_COMPILETIME (PMf_MULTILINE|PMf_SINGLELINE|PMf_LOCALE|PMf_FOLD|PMf_EXTENDED) 314 315 #ifdef USE_ITHREADS 316 317 # define PmopSTASHPV(o) ((o)->op_pmstashpv) 318 # define PmopSTASHPV_set(o,pv) (PmopSTASHPV(o) = savesharedpv(pv)) 319 # define PmopSTASH(o) (PmopSTASHPV(o) \ 320 ? gv_stashpv(PmopSTASHPV(o),GV_ADD) : Nullhv) 321 # define PmopSTASH_set(o,hv) PmopSTASHPV_set(o, ((hv) ? HvNAME_get(hv) : Nullch)) 322 # define PmopSTASH_free(o) PerlMemShared_free(PmopSTASHPV(o)) 323 324 #else 325 # define PmopSTASH(o) ((o)->op_pmstash) 326 # define PmopSTASH_set(o,hv) ((o)->op_pmstash = (hv)) 327 # define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME_get(PmopSTASH(o)) : Nullch) 328 /* op_pmstash is not refcounted */ 329 # define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD)) 330 # define PmopSTASH_free(o) 331 #endif 332 333 struct svop { 334 BASEOP 335 SV * op_sv; 336 }; 337 338 struct padop { 339 BASEOP 340 PADOFFSET op_padix; 341 }; 342 343 struct pvop { 344 BASEOP 345 char * op_pv; 346 }; 347 348 struct loop { 349 BASEOP 350 OP * op_first; 351 OP * op_last; 352 OP * op_redoop; 353 OP * op_nextop; 354 OP * op_lastop; 355 }; 356 357 #define cUNOPx(o) ((UNOP*)o) 358 #define cBINOPx(o) ((BINOP*)o) 359 #define cLISTOPx(o) ((LISTOP*)o) 360 #define cLOGOPx(o) ((LOGOP*)o) 361 #define cPMOPx(o) ((PMOP*)o) 362 #define cSVOPx(o) ((SVOP*)o) 363 #define cPADOPx(o) ((PADOP*)o) 364 #define cPVOPx(o) ((PVOP*)o) 365 #define cCOPx(o) ((COP*)o) 366 #define cLOOPx(o) ((LOOP*)o) 367 368 #define cUNOP cUNOPx(PL_op) 369 #define cBINOP cBINOPx(PL_op) 370 #define cLISTOP cLISTOPx(PL_op) 371 #define cLOGOP cLOGOPx(PL_op) 372 #define cPMOP cPMOPx(PL_op) 373 #define cSVOP cSVOPx(PL_op) 374 #define cPADOP cPADOPx(PL_op) 375 #define cPVOP cPVOPx(PL_op) 376 #define cCOP cCOPx(PL_op) 377 #define cLOOP cLOOPx(PL_op) 378 379 #define cUNOPo cUNOPx(o) 380 #define cBINOPo cBINOPx(o) 381 #define cLISTOPo cLISTOPx(o) 382 #define cLOGOPo cLOGOPx(o) 383 #define cPMOPo cPMOPx(o) 384 #define cSVOPo cSVOPx(o) 385 #define cPADOPo cPADOPx(o) 386 #define cPVOPo cPVOPx(o) 387 #define cCOPo cCOPx(o) 388 #define cLOOPo cLOOPx(o) 389 390 #define kUNOP cUNOPx(kid) 391 #define kBINOP cBINOPx(kid) 392 #define kLISTOP cLISTOPx(kid) 393 #define kLOGOP cLOGOPx(kid) 394 #define kPMOP cPMOPx(kid) 395 #define kSVOP cSVOPx(kid) 396 #define kPADOP cPADOPx(kid) 397 #define kPVOP cPVOPx(kid) 398 #define kCOP cCOPx(kid) 399 #define kLOOP cLOOPx(kid) 400 401 402 #ifdef USE_ITHREADS 403 # define cGVOPx_gv(o) ((GV*)PAD_SVl(cPADOPx(o)->op_padix)) 404 # define IS_PADGV(v) (v && SvTYPE(v) == SVt_PVGV && GvIN_PAD(v)) 405 # define IS_PADCONST(v) (v && SvREADONLY(v)) 406 # define cSVOPx_sv(v) (cSVOPx(v)->op_sv \ 407 ? cSVOPx(v)->op_sv : PAD_SVl((v)->op_targ)) 408 # define cSVOPx_svp(v) (cSVOPx(v)->op_sv \ 409 ? &cSVOPx(v)->op_sv : &PAD_SVl((v)->op_targ)) 410 #else 411 # define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv) 412 # define IS_PADGV(v) FALSE 413 # define IS_PADCONST(v) FALSE 414 # define cSVOPx_sv(v) (cSVOPx(v)->op_sv) 415 # define cSVOPx_svp(v) (&cSVOPx(v)->op_sv) 416 #endif 417 418 #define cGVOP_gv cGVOPx_gv(PL_op) 419 #define cGVOPo_gv cGVOPx_gv(o) 420 #define kGVOP_gv cGVOPx_gv(kid) 421 #define cSVOP_sv cSVOPx_sv(PL_op) 422 #define cSVOPo_sv cSVOPx_sv(o) 423 #define kSVOP_sv cSVOPx_sv(kid) 424 425 #define Nullop Null(OP*) 426 427 /* Lowest byte-and-a-bit of PL_opargs */ 428 #define OA_MARK 1 429 #define OA_FOLDCONST 2 430 #define OA_RETSCALAR 4 431 #define OA_TARGET 8 432 #define OA_RETINTEGER 16 433 #define OA_OTHERINT 32 434 #define OA_DANGEROUS 64 435 #define OA_DEFGV 128 436 #define OA_TARGLEX 256 437 438 /* The next 4 bits encode op class information */ 439 #define OCSHIFT 9 440 441 #define OA_CLASS_MASK (15 << OCSHIFT) 442 443 #define OA_BASEOP (0 << OCSHIFT) 444 #define OA_UNOP (1 << OCSHIFT) 445 #define OA_BINOP (2 << OCSHIFT) 446 #define OA_LOGOP (3 << OCSHIFT) 447 #define OA_LISTOP (4 << OCSHIFT) 448 #define OA_PMOP (5 << OCSHIFT) 449 #define OA_SVOP (6 << OCSHIFT) 450 #define OA_PADOP (7 << OCSHIFT) 451 #define OA_PVOP_OR_SVOP (8 << OCSHIFT) 452 #define OA_LOOP (9 << OCSHIFT) 453 #define OA_COP (10 << OCSHIFT) 454 #define OA_BASEOP_OR_UNOP (11 << OCSHIFT) 455 #define OA_FILESTATOP (12 << OCSHIFT) 456 #define OA_LOOPEXOP (13 << OCSHIFT) 457 458 #define OASHIFT 13 459 460 /* Remaining nybbles of PL_opargs */ 461 #define OA_SCALAR 1 462 #define OA_LIST 2 463 #define OA_AVREF 3 464 #define OA_HVREF 4 465 #define OA_CVREF 5 466 #define OA_FILEREF 6 467 #define OA_SCALARREF 7 468 #define OA_OPTIONAL 8 469 470 #ifdef USE_ITHREADS 471 # define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex) 472 # ifdef PERL_CORE 473 # define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex) 474 # define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex) 475 # else 476 # define OP_REFCNT_LOCK op_refcnt_lock() 477 # define OP_REFCNT_UNLOCK op_refcnt_unlock() 478 # endif 479 # define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex) 480 #else 481 # define OP_REFCNT_INIT NOOP 482 # define OP_REFCNT_LOCK NOOP 483 # define OP_REFCNT_UNLOCK NOOP 484 # define OP_REFCNT_TERM NOOP 485 #endif 486 487 #define OpREFCNT_set(o,n) ((o)->op_targ = (n)) 488 #define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : Nullop) 489 #define OpREFCNT_dec(o) (--(o)->op_targ) 490 491 /* flags used by Perl_load_module() */ 492 #define PERL_LOADMOD_DENY 0x1 493 #define PERL_LOADMOD_NOIMPORT 0x2 494 #define PERL_LOADMOD_IMPORT_OPS 0x4 495 496 #ifdef USE_REENTRANT_API 497 #include "reentr.h" 498 #endif 499 500 #if defined(PL_OP_SLAB_ALLOC) 501 #define NewOp(m,var,c,type) \ 502 (var = (type *) Perl_Slab_Alloc(aTHX_ m,c*sizeof(type))) 503 #define NewOpSz(m,var,size) \ 504 (var = (OP *) Perl_Slab_Alloc(aTHX_ m,size)) 505 #define FreeOp(p) Perl_Slab_Free(aTHX_ p) 506 #else 507 #define NewOp(m, var, c, type) Newxz(var, c, type) 508 #define NewOpSz(m, var, size) \ 509 (var = (OP*)safemalloc(size), memzero(var, size)) 510 #define FreeOp(p) Safefree(p) 511 #endif 512