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tag: perl-5a2
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/* $RCSfile: arg.h,v $$Revision: 4.1 $$Date: 92/08/07 17:18:16 $
*
* Copyright (c) 1991, 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.
*
* $Log: arg.h,v $
*/
/*
* 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 U16 PADOFFSET;
#ifdef DEBUGGING
#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; \
char op_flags; \
char op_private;
#define GIMME (op->op_flags & OPf_KNOW ? op->op_flags & OPf_LIST : getgimme(op))
/* Public flags */
#define OPf_LIST 1 /* Do operator in list context. */
#define OPf_KNOW 2 /* Context is known. */
#define OPf_KIDS 4 /* There is a firstborn child. */
#define OPf_PARENS 8 /* This operator was parenthesized. */
#define OPf_STACKED 16 /* Some arg is arriving on the stack. */
#define OPf_LVAL 32 /* Certified reference (lvalue). */
#define OPf_LOCAL 64 /* Lvalue must be localized */
#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 file tests, we fstat filehandle */
/* 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_ENTERSUBR || OP_NULL, saw a "do". */
/* Private for OP_ASSIGN */
#define OPpASSIGN_COMMON 1 /* Left & right have syms in common. */
/* Private for OP_TRANS */
#define OPpTRANS_SQUASH 1
#define OPpTRANS_DELETE 2
#define OPpTRANS_COMPLEMENT 4
/* Private for OP_REPEAT */
#define OPpREPEAT_DOLIST 1 /* List replication. */
/* Private for OP_SUBR */
#define OPpSUBR_DB 1 /* Debug subroutine. */
/* Private for OP_CONST */
#define OPpCONST_BARE 1 /* Was a bare word (filehandle?). */
/* Private for OP_FLIP/FLOP */
#define OPpFLIP_LINENUM 1 /* Range arg potentially a line num. */
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() */
short op_pmflags;
char op_pmslen;
};
#define PMf_USED 1 /* pm has been used once already */
#define PMf_ONCE 2 /* use pattern only once per reset */
#define PMf_SCANFIRST 4 /* initial constant not anchored */
#define PMf_ALL 8 /* initial constant is whole pat */
#define PMf_SKIPWHITE 16 /* skip leading whitespace for split */
#define PMf_FOLD 32 /* case insensitivity */
#define PMf_CONST 64 /* subst replacement is constant */
#define PMf_KEEP 128 /* keep 1st runtime pattern forever */
#define PMf_GLOBAL 256 /* pattern had a g modifier */
#define PMf_RUNTIME 512 /* pattern coming in on the stack */
#define PMf_EVAL 1024 /* evaluating replacement as expr */
struct svop {
BASEOP
SV * op_sv;
};
struct gvop {
BASEOP
GV * op_gv;
};
struct pvop {
BASEOP
char * op_pv;
};
struct cvop {
BASEOP
CV * op_cv;
OP * op_cont;
};
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 cCVOP ((CVOP*)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 kCVOP ((CVOP*)kid)
#define kCOP ((COP*)kid)
#define kLOOP ((LOOP*)kid)
#define Nullop Null(OP*)
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