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C/C++ Source or Header | 2002-06-19 | 15.0 KB | 483 lines

/* op.h * * Copyright (c) 1991-2002, Larry Wall * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ /* * The fields of BASEOP are: * op_next Pointer to next ppcode to execute after this one. * (Top level pre-grafted op points to first op, * but this is replaced when op is grafted in, when * this op will point to the real next op, and the new * parent takes over role of remembering starting op.) * op_ppaddr Pointer to current ppcode's function. * op_type The type of the operation. * op_flags Flags common to all operations. See OPf_* below. * op_private Flags peculiar to a particular operation (BUT, * by default, set to the number of children until * the operation is privatized by a check routine, * which may or may not check number of children). */ #if PTRSIZE == 4 typedef U32TYPE PADOFFSET; #else # if PTRSIZE == 8 typedef U64TYPE PADOFFSET; # endif #endif #define NOT_IN_PAD ((PADOFFSET) -1) #ifdef DEBUGGING_OPS #define OPCODE opcode #else #define OPCODE U16 #endif #ifdef BASEOP_DEFINITION #define BASEOP BASEOP_DEFINITION #else #define BASEOP \ OP* op_next; \ OP* op_sibling; \ OP* (CPERLscope(*op_ppaddr))(pTHX); \ PADOFFSET op_targ; \ OPCODE op_type; \ U16 op_seq; \ U8 op_flags; \ U8 op_private; #endif #define OP_GIMME(op,dfl) \ (((op)->op_flags & OPf_WANT) == OPf_WANT_VOID ? G_VOID : \ ((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \ ((op)->op_flags & OPf_WANT) == OPf_WANT_LIST ? G_ARRAY : \ dfl) /* =head1 "Gimme" Values =for apidoc Amn|U32|GIMME_V The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>, C<G_SCALAR> or C<G_ARRAY> for void, scalar or list context, respectively. =for apidoc Amn|U32|GIMME A backward-compatible version of C<GIMME_V> which can only return C<G_SCALAR> or C<G_ARRAY>; in a void context, it returns C<G_SCALAR>. Deprecated. Use C<GIMME_V> instead. =cut */ #define GIMME_V OP_GIMME(PL_op, block_gimme()) /* Public flags */ #define OPf_WANT 3 /* Mask for "want" bits: */ #define OPf_WANT_VOID 1 /* Want nothing */ #define OPf_WANT_SCALAR 2 /* Want single value */ #define OPf_WANT_LIST 3 /* Want list of any length */ #define OPf_KIDS 4 /* There is a firstborn child. */ #define OPf_PARENS 8 /* This operator was parenthesized. */ /* (Or block needs explicit scope entry.) */ #define OPf_REF 16 /* Certified reference. */ /* (Return container, not containee). */ #define OPf_MOD 32 /* Will modify (lvalue). */ #define OPf_STACKED 64 /* Some arg is arriving on the stack. */ #define OPf_SPECIAL 128 /* Do something weird for this op: */ /* On local LVAL, don't init local value. */ /* On OP_SORT, subroutine is inlined. */ /* On OP_NOT, inversion was implicit. */ /* On OP_LEAVE, don't restore curpm. */ /* On truncate, we truncate filehandle */ /* On control verbs, we saw no label */ /* On flipflop, we saw ... instead of .. */ /* On UNOPs, saw bare parens, e.g. eof(). */ /* On OP_ENTERSUB || OP_NULL, saw a "do". */ /* On OP_EXISTS, treat av as av, not avhv. */ /* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */ /* On OP_ENTERITER, loop var is per-thread */ /* On pushre, re is /\s+/ imp. by split " " */ /* On regcomp, "use re 'eval'" was in scope */ /* On OP_READLINE, was <$filehandle> */ /* On RV2[SG]V, don't create GV--in defined()*/ /* old names; don't use in new code, but don't break them, either */ #define OPf_LIST OPf_WANT_LIST #define OPf_KNOW OPf_WANT #define GIMME \ (PL_op->op_flags & OPf_WANT \ ? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \ ? G_ARRAY \ : G_SCALAR) \ : dowantarray()) /* NOTE: OP_NEXTSTATE, OP_DBSTATE, and OP_SETSTATE (i.e. COPs) carry lower * bits of PL_hints in op_private */ /* Private for lvalues */ #define OPpLVAL_INTRO 128 /* Lvalue must be localized or lvalue sub */ /* Private for OP_LEAVE, OP_LEAVESUB, OP_LEAVESUBLV and OP_LEAVEWRITE */ #define OPpREFCOUNTED 64 /* op_targ carries a refcount */ /* Private for OP_AASSIGN */ #define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */ #define OPpASSIGN_HASH 32 /* Assigning to possible pseudohash. */ /* Private for OP_SASSIGN */ #define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */ /* Private for OP_MATCH and OP_SUBST{,CONST} */ #define OPpRUNTIME 64 /* Pattern coming in on the stack */ /* Private for OP_TRANS */ #define OPpTRANS_FROM_UTF 1 #define OPpTRANS_TO_UTF 2 #define OPpTRANS_IDENTICAL 4 /* right side is same as left */ #define OPpTRANS_SQUASH 8 #define OPpTRANS_DELETE 16 #define OPpTRANS_COMPLEMENT 32 #define OPpTRANS_GROWS 64 /* Private for OP_REPEAT */ #define OPpREPEAT_DOLIST 64 /* List replication. */ /* Private for OP_RV2?V, OP_?ELEM */ #define OPpDEREF (32|64) /* Want ref to something: */ #define OPpDEREF_AV 32 /* Want ref to AV. */ #define OPpDEREF_HV 64 /* Want ref to HV. */ #define OPpDEREF_SV (32|64) /* Want ref to SV. */ /* OP_ENTERSUB only */ #define OPpENTERSUB_DB 16 /* Debug subroutine. */ #define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */ #define OPpENTERSUB_NOMOD 64 /* Immune to mod() for :attrlist. */ /* OP_RV2CV only */ #define OPpENTERSUB_AMPER 8 /* Used & form to call. */ #define OPpENTERSUB_NOPAREN 128 /* bare sub call (without parens) */ #define OPpENTERSUB_INARGS 4 /* Lval used as arg to a sub. */ /* OP_GV only */ #define OPpEARLY_CV 32 /* foo() called before sub foo was parsed */ /* OP_?ELEM only */ #define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */ /* OP_RV2?V, OP_GVSV only */ #define OPpOUR_INTRO 16 /* Variable was in an our() */ /* OP_RV2[AH]V, OP_PAD[AH]V, OP_[AH]ELEM */ #define OPpMAYBE_LVSUB 8 /* We might be an lvalue to return */ /* for OP_RV2?V, lower bits carry hints (currently only HINT_STRICT_REFS) */ /* Private for OPs with TARGLEX */ /* (lower bits may carry MAXARG) */ #define OPpTARGET_MY 16 /* Target is PADMY. */ /* Private for OP_CONST */ #define OPpCONST_STRICT 8 /* bearword subject to strict 'subs' */ #define OPpCONST_ENTERED 16 /* Has been entered as symbol. */ #define OPpCONST_ARYBASE 32 /* Was a $[ translated to constant. */ #define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */ #define OPpCONST_WARNING 128 /* Was a $^W translated to constant. */ /* Private for OP_FLIP/FLOP */ #define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */ /* Private for OP_LIST */ #define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */ /* Private for OP_DELETE */ #define OPpSLICE 64 /* Operating on a list of keys */ /* Private for OP_EXISTS */ #define OPpEXISTS_SUB 64 /* Checking for &sub, not {} or []. */ /* Private for OP_SORT */ #define OPpSORT_NUMERIC 1 /* Optimized away { $a <=> $b } */ #define OPpSORT_INTEGER 2 /* Ditto while under "use integer" */ #define OPpSORT_REVERSE 4 /* Descending sort */ /* Private for OP_THREADSV */ #define OPpDONE_SVREF 64 /* Been through newSVREF once */ /* Private for OP_OPEN and OP_BACKTICK */ #define OPpOPEN_IN_RAW 16 /* binmode(F,":raw") on input fh */ #define OPpOPEN_IN_CRLF 32 /* binmode(F,":crlf") on input fh */ #define OPpOPEN_OUT_RAW 64 /* binmode(F,":raw") on output fh */ #define OPpOPEN_OUT_CRLF 128 /* binmode(F,":crlf") on output fh */ /* Private for OP_EXIT, HUSH also for OP_DIE */ #define OPpHUSH_VMSISH 64 /* hush DCL exit msg vmsish mode*/ #define OPpEXIT_VMSISH 128 /* exit(0) vs. exit(1) vmsish mode*/ struct op { BASEOP }; struct unop { BASEOP OP * op_first; }; struct binop { BASEOP OP * op_first; OP * op_last; }; struct logop { BASEOP OP * op_first; OP * op_other; }; struct listop { BASEOP OP * op_first; OP * op_last; }; struct pmop { BASEOP OP * op_first; OP * op_last; OP * op_pmreplroot; OP * op_pmreplstart; PMOP * op_pmnext; /* list of all scanpats */ #ifdef USE_ITHREADS IV op_pmoffset; #else REGEXP * op_pmregexp; /* compiled expression */ #endif U32 op_pmflags; U32 op_pmpermflags; U8 op_pmdynflags; #ifdef USE_ITHREADS char * op_pmstashpv; #else HV * op_pmstash; #endif }; #ifdef USE_ITHREADS #define PM_GETRE(o) (INT2PTR(REGEXP*,SvIVX(PL_regex_pad[(o)->op_pmoffset]))) #define PM_SETRE(o,r) STMT_START { SV* sv = PL_regex_pad[(o)->op_pmoffset]; sv_setiv(sv, PTR2IV(r)); } STMT_END #define PM_GETRE_SAFE(o) (PL_regex_pad ? PM_GETRE(o) : (REGEXP*)0) #define PM_SETRE_SAFE(o,r) if (PL_regex_pad) PM_SETRE(o,r) #else #define PM_GETRE(o) ((o)->op_pmregexp) #define PM_SETRE(o,r) ((o)->op_pmregexp = (r)) #define PM_GETRE_SAFE PM_GETRE #define PM_SETRE_SAFE PM_SETRE #endif #define PMdf_USED 0x01 /* pm has been used once already */ #define PMdf_TAINTED 0x02 /* pm compiled from tainted pattern */ #define PMdf_UTF8 0x04 /* pm compiled from utf8 data */ #define PMdf_DYN_UTF8 0x08 #define PMdf_CMP_UTF8 (PMdf_UTF8|PMdf_DYN_UTF8) #define PMf_RETAINT 0x0001 /* taint $1 etc. if target tainted */ #define PMf_ONCE 0x0002 /* use pattern only once per reset */ #define PMf_UNUSED 0x0004 /* free for use */ #define PMf_MAYBE_CONST 0x0008 /* replacement contains variables */ #define PMf_SKIPWHITE 0x0010 /* skip leading whitespace for split */ #define PMf_WHITE 0x0020 /* pattern is \s+ */ #define PMf_CONST 0x0040 /* subst replacement is constant */ #define PMf_KEEP 0x0080 /* keep 1st runtime pattern forever */ #define PMf_GLOBAL 0x0100 /* pattern had a g modifier */ #define PMf_CONTINUE 0x0200 /* don't reset pos() if //g fails */ #define PMf_EVAL 0x0400 /* evaluating replacement as expr */ #define PMf_LOCALE 0x0800 /* use locale for character types */ #define PMf_MULTILINE 0x1000 /* assume multiple lines */ #define PMf_SINGLELINE 0x2000 /* assume single line */ #define PMf_FOLD 0x4000 /* case insensitivity */ #define PMf_EXTENDED 0x8000 /* chuck embedded whitespace */ /* mask of bits stored in regexp->reganch */ #define PMf_COMPILETIME (PMf_MULTILINE|PMf_SINGLELINE|PMf_LOCALE|PMf_FOLD|PMf_EXTENDED) #ifdef USE_ITHREADS # define PmopSTASHPV(o) ((o)->op_pmstashpv) # define PmopSTASHPV_set(o,pv) (PmopSTASHPV(o) = savesharedpv(pv)) # define PmopSTASH(o) (PmopSTASHPV(o) \ ? gv_stashpv(PmopSTASHPV(o),GV_ADD) : Nullhv) # define PmopSTASH_set(o,hv) PmopSTASHPV_set(o, ((hv) ? HvNAME(hv) : Nullch)) # define PmopSTASH_free(o) PerlMemShared_free(PmopSTASHPV(o)) #else # define PmopSTASH(o) ((o)->op_pmstash) # define PmopSTASH_set(o,hv) ((o)->op_pmstash = (hv)) # define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME(PmopSTASH(o)) : Nullch) /* op_pmstash is not refcounted */ # define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD)) # define PmopSTASH_free(o) #endif struct svop { BASEOP SV * op_sv; }; struct padop { BASEOP PADOFFSET op_padix; }; struct pvop { BASEOP char * op_pv; }; struct loop { BASEOP OP * op_first; OP * op_last; OP * op_redoop; OP * op_nextop; OP * op_lastop; }; #define cUNOPx(o) ((UNOP*)o) #define cBINOPx(o) ((BINOP*)o) #define cLISTOPx(o) ((LISTOP*)o) #define cLOGOPx(o) ((LOGOP*)o) #define cPMOPx(o) ((PMOP*)o) #define cSVOPx(o) ((SVOP*)o) #define cPADOPx(o) ((PADOP*)o) #define cPVOPx(o) ((PVOP*)o) #define cCOPx(o) ((COP*)o) #define cLOOPx(o) ((LOOP*)o) #define cUNOP cUNOPx(PL_op) #define cBINOP cBINOPx(PL_op) #define cLISTOP cLISTOPx(PL_op) #define cLOGOP cLOGOPx(PL_op) #define cPMOP cPMOPx(PL_op) #define cSVOP cSVOPx(PL_op) #define cPADOP cPADOPx(PL_op) #define cPVOP cPVOPx(PL_op) #define cCOP cCOPx(PL_op) #define cLOOP cLOOPx(PL_op) #define cUNOPo cUNOPx(o) #define cBINOPo cBINOPx(o) #define cLISTOPo cLISTOPx(o) #define cLOGOPo cLOGOPx(o) #define cPMOPo cPMOPx(o) #define cSVOPo cSVOPx(o) #define cPADOPo cPADOPx(o) #define cPVOPo cPVOPx(o) #define cCOPo cCOPx(o) #define cLOOPo cLOOPx(o) #define kUNOP cUNOPx(kid) #define kBINOP cBINOPx(kid) #define kLISTOP cLISTOPx(kid) #define kLOGOP cLOGOPx(kid) #define kPMOP cPMOPx(kid) #define kSVOP cSVOPx(kid) #define kPADOP cPADOPx(kid) #define kPVOP cPVOPx(kid) #define kCOP cCOPx(kid) #define kLOOP cLOOPx(kid) #ifdef USE_ITHREADS # define cGVOPx_gv(o) ((GV*)PL_curpad[cPADOPx(o)->op_padix]) # define IS_PADGV(v) (v && SvTYPE(v) == SVt_PVGV && GvIN_PAD(v)) # define IS_PADCONST(v) (v && SvREADONLY(v)) # define cSVOPx_sv(v) (cSVOPx(v)->op_sv \ ? cSVOPx(v)->op_sv : PL_curpad[(v)->op_targ]) # define cSVOPx_svp(v) (cSVOPx(v)->op_sv \ ? &cSVOPx(v)->op_sv : &PL_curpad[(v)->op_targ]) #else # define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv) # define IS_PADGV(v) FALSE # define IS_PADCONST(v) FALSE # define cSVOPx_sv(v) (cSVOPx(v)->op_sv) # define cSVOPx_svp(v) (&cSVOPx(v)->op_sv) #endif #define cGVOP_gv cGVOPx_gv(PL_op) #define cGVOPo_gv cGVOPx_gv(o) #define kGVOP_gv cGVOPx_gv(kid) #define cSVOP_sv cSVOPx_sv(PL_op) #define cSVOPo_sv cSVOPx_sv(o) #define kSVOP_sv cSVOPx_sv(kid) #define Nullop Null(OP*) /* Lowest byte-and-a-bit of PL_opargs */ #define OA_MARK 1 #define OA_FOLDCONST 2 #define OA_RETSCALAR 4 #define OA_TARGET 8 #define OA_RETINTEGER 16 #define OA_OTHERINT 32 #define OA_DANGEROUS 64 #define OA_DEFGV 128 #define OA_TARGLEX 256 /* The next 4 bits encode op class information */ #define OCSHIFT 9 #define OA_CLASS_MASK (15 << OCSHIFT) #define OA_BASEOP (0 << OCSHIFT) #define OA_UNOP (1 << OCSHIFT) #define OA_BINOP (2 << OCSHIFT) #define OA_LOGOP (3 << OCSHIFT) #define OA_LISTOP (4 << OCSHIFT) #define OA_PMOP (5 << OCSHIFT) #define OA_SVOP (6 << OCSHIFT) #define OA_PADOP (7 << OCSHIFT) #define OA_PVOP_OR_SVOP (8 << OCSHIFT) #define OA_LOOP (9 << OCSHIFT) #define OA_COP (10 << OCSHIFT) #define OA_BASEOP_OR_UNOP (11 << OCSHIFT) #define OA_FILESTATOP (12 << OCSHIFT) #define OA_LOOPEXOP (13 << OCSHIFT) #define OASHIFT 13 /* Remaining nybbles of PL_opargs */ #define OA_SCALAR 1 #define OA_LIST 2 #define OA_AVREF 3 #define OA_HVREF 4 #define OA_CVREF 5 #define OA_FILEREF 6 #define OA_SCALARREF 7 #define OA_OPTIONAL 8 #ifdef USE_ITHREADS # define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex) # define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex) # define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex) # define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex) #else # define OP_REFCNT_INIT NOOP # define OP_REFCNT_LOCK NOOP # define OP_REFCNT_UNLOCK NOOP # define OP_REFCNT_TERM NOOP #endif #define OpREFCNT_set(o,n) ((o)->op_targ = (n)) #define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : Nullop) #define OpREFCNT_dec(o) (--(o)->op_targ) /* flags used by Perl_load_module() */ #define PERL_LOADMOD_DENY 0x1 #define PERL_LOADMOD_NOIMPORT 0x2 #define PERL_LOADMOD_IMPORT_OPS 0x4 #ifdef USE_REENTRANT_API #include "reentr.h" #endif