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/* op.h
*
* Copyright (c) 1991-1997, 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).
*/
typedef U32 PADOFFSET;
#ifdef DEBUGGING_OPS
#define OPCODE opcode
#else
#define OPCODE U16
#endif
#define BASEOP \
OP* op_next; \
OP* op_sibling; \
OP* (*op_ppaddr)(); \
PADOFFSET op_targ; \
OPCODE op_type; \
U16 op_seq; \
U8 op_flags; \
U8 op_private;
#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)
#define GIMME_V OP_GIMME(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_(ENTER|LEAVE)EVAL, don't clear $@ */
/* old names; don't use in new code, but don't break them, either */
#define OPf_LIST 1
#define OPf_KNOW 2
#define GIMME \
(op->op_flags & OPf_KNOW ? op->op_flags & OPf_LIST : dowantarray())
/* Private for lvalues */
#define OPpLVAL_INTRO 128 /* Lvalue must be localized */
/* Private for OP_AASSIGN */
#define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */
/* 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_SQUASH 16
#define OPpTRANS_DELETE 32
#define OPpTRANS_COMPLEMENT 64
/* Private for OP_REPEAT */
#define OPpREPEAT_DOLIST 64 /* List replication. */
/* Private for OP_ENTERSUB, 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_AMPER 8 /* Used & form to call. */
/* OP_?ELEM only */
#define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */
/* for OP_RV2?V, lower bits carry hints */
/* Private for OP_CONST */
#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?). */
/* 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_SORT, OP_PRTF, OP_SPRINTF, string cmp'n, and case changers */
#define OPpLOCALE 64 /* Use locale */
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 condop {
BASEOP
OP * op_first;
OP * op_true;
OP * op_false;
};
struct listop {
BASEOP
OP * op_first;
OP * op_last;
U32 op_children;
};
struct pmop {
BASEOP
OP * op_first;
OP * op_last;
U32 op_children;
OP * op_pmreplroot;
OP * op_pmreplstart;
PMOP * op_pmnext; /* list of all scanpats */
REGEXP * op_pmregexp; /* compiled expression */
SV * op_pmshort; /* for a fast bypass of execute() */
U16 op_pmflags;
U16 op_pmpermflags;
char op_pmslen;
};
#define PMf_USED 0x0001 /* pm has been used once already */
#define PMf_ONCE 0x0002 /* use pattern only once per reset */
#define PMf_SCANFIRST 0x0004 /* initial constant not anchored */
#define PMf_ALL 0x0008 /* initial constant is whole pat */
#define PMf_SKIPWHITE 0x0010 /* skip leading whitespace for split */
#define PMf_FOLD 0x0020 /* case insensitivity */
#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_WHITE 0x0800 /* pattern is \s+ */
#define PMf_MULTILINE 0x1000 /* assume multiple lines */
#define PMf_SINGLELINE 0x2000 /* assume single line */
#define PMf_LOCALE 0x4000 /* use locale for character types */
#define PMf_EXTENDED 0x8000 /* chuck embedded whitespace */
struct svop {
BASEOP
SV * op_sv;
};
struct gvop {
BASEOP
GV * op_gv;
};
struct pvop {
BASEOP
char * op_pv;
};
struct loop {
BASEOP
OP * op_first;
OP * op_last;
U32 op_children;
OP * op_redoop;
OP * op_nextop;
OP * op_lastop;
};
#define cUNOP ((UNOP*)op)
#define cBINOP ((BINOP*)op)
#define cLISTOP ((LISTOP*)op)
#define cLOGOP ((LOGOP*)op)
#define cCONDOP ((CONDOP*)op)
#define cPMOP ((PMOP*)op)
#define cSVOP ((SVOP*)op)
#define cGVOP ((GVOP*)op)
#define cPVOP ((PVOP*)op)
#define cCOP ((COP*)op)
#define cLOOP ((LOOP*)op)
#define kUNOP ((UNOP*)kid)
#define kBINOP ((BINOP*)kid)
#define kLISTOP ((LISTOP*)kid)
#define kLOGOP ((LOGOP*)kid)
#define kCONDOP ((CONDOP*)kid)
#define kPMOP ((PMOP*)kid)
#define kSVOP ((SVOP*)kid)
#define kGVOP ((GVOP*)kid)
#define kPVOP ((PVOP*)kid)
#define kCOP ((COP*)kid)
#define kLOOP ((LOOP*)kid)
#define Nullop Null(OP*)
/* Lowest byte of 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 OASHIFT 8
/* Remaining nybbles of 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
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