323 lines
8.9 KiB
C
323 lines
8.9 KiB
C
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/* op.h
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*
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* Copyright (c) 1991-1997, 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))_((ARGSproto)); \
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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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#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_(ENTER|LEAVE)EVAL, don't clear $@ */
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/* On OP_ENTERITER, loop var is per-thread */
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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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/* Private for lvalues */
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#define OPpLVAL_INTRO 128 /* Lvalue must be localized */
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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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/* 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_COUNTONLY 8
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#define OPpTRANS_SQUASH 16
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#define OPpTRANS_DELETE 32
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#define OPpTRANS_COMPLEMENT 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_ENTERSUB, 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_AMPER 8 /* Used & form to call. */
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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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/* for OP_RV2?V, lower bits carry hints */
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/* Private for OP_CONST */
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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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/* 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_SORT, OP_PRTF, OP_SPRINTF, string cmp'n, and case changers */
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#define OPpLOCALE 64 /* Use locale */
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/* Private for OP_THREADSV */
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#define OPpDONE_SVREF 64 /* Been through newSVREF once */
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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 condop {
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BASEOP
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OP * op_first;
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OP * op_true;
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OP * op_false;
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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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U32 op_children;
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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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U32 op_children;
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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 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 gvop {
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BASEOP
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GV * op_gv;
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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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U32 op_children;
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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 cUNOP ((UNOP*)PL_op)
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#define cBINOP ((BINOP*)PL_op)
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#define cLISTOP ((LISTOP*)PL_op)
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#define cLOGOP ((LOGOP*)PL_op)
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#define cCONDOP ((CONDOP*)PL_op)
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#define cPMOP ((PMOP*)PL_op)
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#define cSVOP ((SVOP*)PL_op)
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#define cGVOP ((GVOP*)PL_op)
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#define cPVOP ((PVOP*)PL_op)
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#define cCOP ((COP*)PL_op)
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#define cLOOP ((LOOP*)PL_op)
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#define cUNOPo ((UNOP*)o)
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#define cBINOPo ((BINOP*)o)
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#define cLISTOPo ((LISTOP*)o)
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#define cLOGOPo ((LOGOP*)o)
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#define cCONDOPo ((CONDOP*)o)
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#define cPMOPo ((PMOP*)o)
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#define cSVOPo ((SVOP*)o)
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#define cGVOPo ((GVOP*)o)
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#define cPVOPo ((PVOP*)o)
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#define cCVOPo ((CVOP*)o)
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#define cCOPo ((COP*)o)
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#define cLOOPo ((LOOP*)o)
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#define kUNOP ((UNOP*)kid)
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#define kBINOP ((BINOP*)kid)
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#define kLISTOP ((LISTOP*)kid)
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#define kLOGOP ((LOGOP*)kid)
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#define kCONDOP ((CONDOP*)kid)
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#define kPMOP ((PMOP*)kid)
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#define kSVOP ((SVOP*)kid)
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#define kGVOP ((GVOP*)kid)
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#define kPVOP ((PVOP*)kid)
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#define kCOP ((COP*)kid)
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#define kLOOP ((LOOP*)kid)
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#define Nullop Null(OP*)
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/* Lowest byte of 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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/* The next 4 bits encode op class information */
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#define OA_CLASS_MASK (15 << 8)
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#define OA_BASEOP (0 << 8)
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#define OA_UNOP (1 << 8)
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#define OA_BINOP (2 << 8)
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#define OA_LOGOP (3 << 8)
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#define OA_CONDOP (4 << 8)
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#define OA_LISTOP (5 << 8)
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#define OA_PMOP (6 << 8)
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#define OA_SVOP (7 << 8)
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#define OA_GVOP (8 << 8)
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#define OA_PVOP (9 << 8)
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#define OA_LOOP (10 << 8)
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#define OA_COP (11 << 8)
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#define OA_BASEOP_OR_UNOP (12 << 8)
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#define OA_FILESTATOP (13 << 8)
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#define OA_LOOPEXOP (14 << 8)
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#define OASHIFT 12
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/* Remaining nybbles of 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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