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423 lines
13 KiB
423 lines
13 KiB
/* op.h
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*
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* Copyright (c) 1991-2001, Larry Wall
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Artistic License, as specified in the README file.
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*
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*/
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/*
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* The fields of BASEOP are:
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* op_next Pointer to next ppcode to execute after this one.
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* (Top level pre-grafted op points to first op,
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* but this is replaced when op is grafted in, when
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* this op will point to the real next op, and the new
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* parent takes over role of remembering starting op.)
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* op_ppaddr Pointer to current ppcode's function.
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* op_type The type of the operation.
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* op_flags Flags common to all operations. See OPf_* below.
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* op_private Flags peculiar to a particular operation (BUT,
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* by default, set to the number of children until
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* the operation is privatized by a check routine,
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* which may or may not check number of children).
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*/
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typedef U32 PADOFFSET;
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#define NOT_IN_PAD ((PADOFFSET) -1)
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#ifdef DEBUGGING_OPS
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#define OPCODE opcode
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#else
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#define OPCODE U16
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#endif
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#ifdef BASEOP_DEFINITION
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#define BASEOP BASEOP_DEFINITION
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#else
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#define BASEOP \
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OP* op_next; \
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OP* op_sibling; \
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OP* (CPERLscope(*op_ppaddr))(pTHX); \
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PADOFFSET op_targ; \
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OPCODE op_type; \
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U16 op_seq; \
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U8 op_flags; \
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U8 op_private;
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#endif
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#define OP_GIMME(op,dfl) \
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(((op)->op_flags & OPf_WANT) == OPf_WANT_VOID ? G_VOID : \
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((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \
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((op)->op_flags & OPf_WANT) == OPf_WANT_LIST ? G_ARRAY : \
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dfl)
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/*
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=for apidoc Amn|U32|GIMME_V
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The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>,
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C<G_SCALAR> or C<G_ARRAY> for void, scalar or list context,
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respectively.
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=for apidoc Amn|U32|GIMME
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A backward-compatible version of C<GIMME_V> which can only return
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C<G_SCALAR> or C<G_ARRAY>; in a void context, it returns C<G_SCALAR>.
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Deprecated. Use C<GIMME_V> instead.
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=cut
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*/
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#define GIMME_V OP_GIMME(PL_op, block_gimme())
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/* Public flags */
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#define OPf_WANT 3 /* Mask for "want" bits: */
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#define OPf_WANT_VOID 1 /* Want nothing */
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#define OPf_WANT_SCALAR 2 /* Want single value */
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#define OPf_WANT_LIST 3 /* Want list of any length */
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#define OPf_KIDS 4 /* There is a firstborn child. */
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#define OPf_PARENS 8 /* This operator was parenthesized. */
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/* (Or block needs explicit scope entry.) */
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#define OPf_REF 16 /* Certified reference. */
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/* (Return container, not containee). */
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#define OPf_MOD 32 /* Will modify (lvalue). */
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#define OPf_STACKED 64 /* Some arg is arriving on the stack. */
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#define OPf_SPECIAL 128 /* Do something weird for this op: */
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/* On local LVAL, don't init local value. */
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/* On OP_SORT, subroutine is inlined. */
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/* On OP_NOT, inversion was implicit. */
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/* On OP_LEAVE, don't restore curpm. */
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/* On truncate, we truncate filehandle */
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/* On control verbs, we saw no label */
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/* On flipflop, we saw ... instead of .. */
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/* On UNOPs, saw bare parens, e.g. eof(). */
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/* On OP_ENTERSUB || OP_NULL, saw a "do". */
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/* On OP_EXISTS, treat av as av, not avhv. */
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/* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */
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/* On OP_ENTERITER, loop var is per-thread */
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/* On pushre, re is /\s+/ imp. by split " " */
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/* On regcomp, "use re 'eval'" was in scope */
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/* old names; don't use in new code, but don't break them, either */
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#define OPf_LIST OPf_WANT_LIST
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#define OPf_KNOW OPf_WANT
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#define GIMME \
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(PL_op->op_flags & OPf_WANT \
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? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \
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? G_ARRAY \
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: G_SCALAR) \
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: dowantarray())
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/* NOTE: OP_NEXTSTATE, OP_DBSTATE, and OP_SETSTATE (i.e. COPs) carry lower
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* bits of PL_hints in op_private */
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/* Private for lvalues */
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#define OPpLVAL_INTRO 128 /* Lvalue must be localized or lvalue sub */
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/* Private for OP_LEAVE, OP_LEAVESUB, OP_LEAVESUBLV and OP_LEAVEWRITE */
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#define OPpREFCOUNTED 64 /* op_targ carries a refcount */
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/* Private for OP_AASSIGN */
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#define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */
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#define OPpASSIGN_HASH 32 /* Assigning to possible pseudohash. */
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/* Private for OP_SASSIGN */
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#define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */
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/* Private for OP_MATCH and OP_SUBST{,CONST} */
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#define OPpRUNTIME 64 /* Pattern coming in on the stack */
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/* Private for OP_TRANS */
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#define OPpTRANS_FROM_UTF 1
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#define OPpTRANS_TO_UTF 2
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#define OPpTRANS_IDENTICAL 4 /* right side is same as left */
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#define OPpTRANS_SQUASH 8
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#define OPpTRANS_DELETE 16
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#define OPpTRANS_COMPLEMENT 32
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#define OPpTRANS_GROWS 64
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/* Private for OP_REPEAT */
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#define OPpREPEAT_DOLIST 64 /* List replication. */
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/* Private for OP_RV2?V, OP_?ELEM */
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#define OPpDEREF (32|64) /* Want ref to something: */
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#define OPpDEREF_AV 32 /* Want ref to AV. */
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#define OPpDEREF_HV 64 /* Want ref to HV. */
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#define OPpDEREF_SV (32|64) /* Want ref to SV. */
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/* OP_ENTERSUB only */
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#define OPpENTERSUB_DB 16 /* Debug subroutine. */
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#define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */
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/* OP_RV2CV only */
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#define OPpENTERSUB_AMPER 8 /* Used & form to call. */
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#define OPpENTERSUB_NOPAREN 128 /* bare sub call (without parens) */
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#define OPpENTERSUB_INARGS 4 /* Lval used as arg to a sub. */
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/* OP_GV only */
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#define OPpEARLY_CV 32 /* foo() called before sub foo was parsed */
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/* OP_?ELEM only */
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#define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */
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/* OP_RV2?V, OP_GVSV only */
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#define OPpOUR_INTRO 16 /* Variable was in an our() */
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/* OP_RV2[AH]V, OP_PAD[AH]V, OP_[AH]ELEM */
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#define OPpMAYBE_LVSUB 8 /* We might be an lvalue to return */
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/* for OP_RV2?V, lower bits carry hints (currently only HINT_STRICT_REFS) */
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/* Private for OPs with TARGLEX */
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/* (lower bits may carry MAXARG) */
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#define OPpTARGET_MY 16 /* Target is PADMY. */
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/* Private for OP_CONST */
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#define OPpCONST_STRICT 8 /* bearword subject to strict 'subs' */
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#define OPpCONST_ENTERED 16 /* Has been entered as symbol. */
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#define OPpCONST_ARYBASE 32 /* Was a $[ translated to constant. */
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#define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */
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#define OPpCONST_WARNING 128 /* Was a $^W translated to constant. */
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/* Private for OP_FLIP/FLOP */
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#define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */
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/* Private for OP_LIST */
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#define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */
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/* Private for OP_DELETE */
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#define OPpSLICE 64 /* Operating on a list of keys */
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/* Private for OP_EXISTS */
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#define OPpEXISTS_SUB 64 /* Checking for &sub, not {} or []. */
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/* Private for OP_SORT */
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#define OPpSORT_NUMERIC 1 /* Optimized away { $a <=> $b } */
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#define OPpSORT_INTEGER 2 /* Ditto while under "use integer" */
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#define OPpSORT_REVERSE 4 /* Descending sort */
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/* Private for OP_THREADSV */
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#define OPpDONE_SVREF 64 /* Been through newSVREF once */
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/* Private for OP_OPEN and OP_BACKTICK */
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#define OPpOPEN_IN_RAW 16 /* binmode(F,":raw") on input fh */
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#define OPpOPEN_IN_CRLF 32 /* binmode(F,":crlf") on input fh */
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#define OPpOPEN_OUT_RAW 64 /* binmode(F,":raw") on output fh */
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#define OPpOPEN_OUT_CRLF 128 /* binmode(F,":crlf") on output fh */
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/* Private for OP_EXIT */
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#define OPpEXIT_VMSISH 128 /* exit(0) vs. exit(1) vmsish mode*/
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struct op {
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BASEOP
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};
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struct unop {
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BASEOP
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OP * op_first;
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};
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struct binop {
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BASEOP
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OP * op_first;
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OP * op_last;
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};
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struct logop {
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BASEOP
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OP * op_first;
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OP * op_other;
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};
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struct listop {
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BASEOP
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OP * op_first;
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OP * op_last;
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};
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struct pmop {
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BASEOP
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OP * op_first;
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OP * op_last;
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OP * op_pmreplroot;
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OP * op_pmreplstart;
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PMOP * op_pmnext; /* list of all scanpats */
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REGEXP * op_pmregexp; /* compiled expression */
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U16 op_pmflags;
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U16 op_pmpermflags;
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U8 op_pmdynflags;
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};
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#define PMdf_USED 0x01 /* pm has been used once already */
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#define PMdf_TAINTED 0x02 /* pm compiled from tainted pattern */
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#define PMdf_UTF8 0x04 /* pm compiled from utf8 data */
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#define PMf_RETAINT 0x0001 /* taint $1 etc. if target tainted */
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#define PMf_ONCE 0x0002 /* use pattern only once per reset */
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#define PMf_REVERSED 0x0004 /* Should be matched right->left */
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#define PMf_MAYBE_CONST 0x0008 /* replacement contains variables */
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#define PMf_SKIPWHITE 0x0010 /* skip leading whitespace for split */
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#define PMf_WHITE 0x0020 /* pattern is \s+ */
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#define PMf_CONST 0x0040 /* subst replacement is constant */
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#define PMf_KEEP 0x0080 /* keep 1st runtime pattern forever */
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#define PMf_GLOBAL 0x0100 /* pattern had a g modifier */
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#define PMf_CONTINUE 0x0200 /* don't reset pos() if //g fails */
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#define PMf_EVAL 0x0400 /* evaluating replacement as expr */
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#define PMf_LOCALE 0x0800 /* use locale for character types */
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#define PMf_MULTILINE 0x1000 /* assume multiple lines */
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#define PMf_SINGLELINE 0x2000 /* assume single line */
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#define PMf_FOLD 0x4000 /* case insensitivity */
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#define PMf_EXTENDED 0x8000 /* chuck embedded whitespace */
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/* mask of bits stored in regexp->reganch */
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#define PMf_COMPILETIME (PMf_MULTILINE|PMf_SINGLELINE|PMf_LOCALE|PMf_FOLD|PMf_EXTENDED)
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struct svop {
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BASEOP
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SV * op_sv;
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};
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struct padop {
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BASEOP
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PADOFFSET op_padix;
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};
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struct pvop {
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BASEOP
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char * op_pv;
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};
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struct loop {
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BASEOP
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OP * op_first;
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OP * op_last;
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OP * op_redoop;
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OP * op_nextop;
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OP * op_lastop;
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};
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#define cUNOPx(o) ((UNOP*)o)
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#define cBINOPx(o) ((BINOP*)o)
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#define cLISTOPx(o) ((LISTOP*)o)
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#define cLOGOPx(o) ((LOGOP*)o)
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#define cPMOPx(o) ((PMOP*)o)
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#define cSVOPx(o) ((SVOP*)o)
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#define cPADOPx(o) ((PADOP*)o)
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#define cPVOPx(o) ((PVOP*)o)
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#define cCOPx(o) ((COP*)o)
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#define cLOOPx(o) ((LOOP*)o)
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#define cUNOP cUNOPx(PL_op)
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#define cBINOP cBINOPx(PL_op)
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#define cLISTOP cLISTOPx(PL_op)
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#define cLOGOP cLOGOPx(PL_op)
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#define cPMOP cPMOPx(PL_op)
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#define cSVOP cSVOPx(PL_op)
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#define cPADOP cPADOPx(PL_op)
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#define cPVOP cPVOPx(PL_op)
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#define cCOP cCOPx(PL_op)
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#define cLOOP cLOOPx(PL_op)
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#define cUNOPo cUNOPx(o)
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#define cBINOPo cBINOPx(o)
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#define cLISTOPo cLISTOPx(o)
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#define cLOGOPo cLOGOPx(o)
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#define cPMOPo cPMOPx(o)
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#define cSVOPo cSVOPx(o)
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#define cPADOPo cPADOPx(o)
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#define cPVOPo cPVOPx(o)
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#define cCOPo cCOPx(o)
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#define cLOOPo cLOOPx(o)
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#define kUNOP cUNOPx(kid)
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#define kBINOP cBINOPx(kid)
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#define kLISTOP cLISTOPx(kid)
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#define kLOGOP cLOGOPx(kid)
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#define kPMOP cPMOPx(kid)
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#define kSVOP cSVOPx(kid)
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#define kPADOP cPADOPx(kid)
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#define kPVOP cPVOPx(kid)
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#define kCOP cCOPx(kid)
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#define kLOOP cLOOPx(kid)
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#ifdef USE_ITHREADS
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# define cGVOPx_gv(o) ((GV*)PL_curpad[cPADOPx(o)->op_padix])
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# define IS_PADGV(v) (v && SvTYPE(v) == SVt_PVGV && GvIN_PAD(v))
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# define IS_PADCONST(v) (v && SvREADONLY(v))
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# define cSVOPx_sv(v) (cSVOPx(v)->op_sv \
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? cSVOPx(v)->op_sv : PL_curpad[(v)->op_targ])
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# define cSVOPx_svp(v) (cSVOPx(v)->op_sv \
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? &cSVOPx(v)->op_sv : &PL_curpad[(v)->op_targ])
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#else
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# define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv)
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# define IS_PADGV(v) FALSE
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# define IS_PADCONST(v) FALSE
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# define cSVOPx_sv(v) (cSVOPx(v)->op_sv)
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# define cSVOPx_svp(v) (&cSVOPx(v)->op_sv)
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#endif
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#define cGVOP_gv cGVOPx_gv(PL_op)
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#define cGVOPo_gv cGVOPx_gv(o)
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#define kGVOP_gv cGVOPx_gv(kid)
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#define cSVOP_sv cSVOPx_sv(PL_op)
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#define cSVOPo_sv cSVOPx_sv(o)
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#define kSVOP_sv cSVOPx_sv(kid)
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#define Nullop Null(OP*)
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/* Lowest byte of PL_opargs */
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#define OA_MARK 1
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#define OA_FOLDCONST 2
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#define OA_RETSCALAR 4
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#define OA_TARGET 8
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#define OA_RETINTEGER 16
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#define OA_OTHERINT 32
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#define OA_DANGEROUS 64
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#define OA_DEFGV 128
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#define OA_TARGLEX 256
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/* The next 4 bits encode op class information */
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#define OCSHIFT 9
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#define OA_CLASS_MASK (15 << OCSHIFT)
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#define OA_BASEOP (0 << OCSHIFT)
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#define OA_UNOP (1 << OCSHIFT)
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#define OA_BINOP (2 << OCSHIFT)
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#define OA_LOGOP (3 << OCSHIFT)
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#define OA_LISTOP (4 << OCSHIFT)
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#define OA_PMOP (5 << OCSHIFT)
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#define OA_SVOP (6 << OCSHIFT)
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#define OA_PADOP (7 << OCSHIFT)
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#define OA_PVOP_OR_SVOP (8 << OCSHIFT)
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#define OA_LOOP (9 << OCSHIFT)
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#define OA_COP (10 << OCSHIFT)
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#define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
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#define OA_FILESTATOP (12 << OCSHIFT)
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#define OA_LOOPEXOP (13 << OCSHIFT)
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#define OASHIFT 13
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/* Remaining nybbles of PL_opargs */
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#define OA_SCALAR 1
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#define OA_LIST 2
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#define OA_AVREF 3
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#define OA_HVREF 4
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#define OA_CVREF 5
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#define OA_FILEREF 6
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#define OA_SCALARREF 7
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#define OA_OPTIONAL 8
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#ifdef USE_ITHREADS
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# define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex)
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# define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex)
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# define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex)
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# define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex)
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#else
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# define OP_REFCNT_INIT NOOP
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# define OP_REFCNT_LOCK NOOP
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# define OP_REFCNT_UNLOCK NOOP
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# define OP_REFCNT_TERM NOOP
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#endif
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#define OpREFCNT_set(o,n) ((o)->op_targ = (n))
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#define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : Nullop)
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#define OpREFCNT_dec(o) (--(o)->op_targ)
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/* flags used by Perl_load_module() */
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#define PERL_LOADMOD_DENY 0x1
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#define PERL_LOADMOD_NOIMPORT 0x2
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#define PERL_LOADMOD_IMPORT_OPS 0x4
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