home *** CD-ROM | disk | FTP | other *** search
- /* 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;
- #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))_((ARGSproto)); \
- 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)
-
- #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_(ENTER|LEAVE)EVAL, don't clear $@ */
- /* On OP_ENTERITER, loop var is per-thread */
-
- /* 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())
-
- /* 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_COUNTONLY 8
- #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 */
-
- /* Private for OP_THREADSV */
- #define OPpDONE_SVREF 64 /* Been through newSVREF once */
-
- 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 */
- U16 op_pmflags;
- U16 op_pmpermflags;
- U8 op_pmdynflags;
- };
-
- #define PMdf_USED 0x01 /* pm has been used once already */
- #define PMdf_TAINTED 0x02 /* pm compiled from tainted pattern */
-
- #define PMf_RETAINT 0x0001 /* taint $1 etc. if target tainted */
- #define PMf_ONCE 0x0002 /* use pattern only once per reset */
- #define PMf_REVERSED 0x0004 /* Should be matched right->left */
- #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)
-
- 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*)PL_op)
- #define cBINOP ((BINOP*)PL_op)
- #define cLISTOP ((LISTOP*)PL_op)
- #define cLOGOP ((LOGOP*)PL_op)
- #define cCONDOP ((CONDOP*)PL_op)
- #define cPMOP ((PMOP*)PL_op)
- #define cSVOP ((SVOP*)PL_op)
- #define cGVOP ((GVOP*)PL_op)
- #define cPVOP ((PVOP*)PL_op)
- #define cCOP ((COP*)PL_op)
- #define cLOOP ((LOOP*)PL_op)
-
- #define cUNOPo ((UNOP*)o)
- #define cBINOPo ((BINOP*)o)
- #define cLISTOPo ((LISTOP*)o)
- #define cLOGOPo ((LOGOP*)o)
- #define cCONDOPo ((CONDOP*)o)
- #define cPMOPo ((PMOP*)o)
- #define cSVOPo ((SVOP*)o)
- #define cGVOPo ((GVOP*)o)
- #define cPVOPo ((PVOP*)o)
- #define cCVOPo ((CVOP*)o)
- #define cCOPo ((COP*)o)
- #define cLOOPo ((LOOP*)o)
-
- #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
-
- /* The next 4 bits encode op class information */
- #define OA_CLASS_MASK (15 << 8)
-
- #define OA_BASEOP (0 << 8)
- #define OA_UNOP (1 << 8)
- #define OA_BINOP (2 << 8)
- #define OA_LOGOP (3 << 8)
- #define OA_CONDOP (4 << 8)
- #define OA_LISTOP (5 << 8)
- #define OA_PMOP (6 << 8)
- #define OA_SVOP (7 << 8)
- #define OA_GVOP (8 << 8)
- #define OA_PVOP (9 << 8)
- #define OA_LOOP (10 << 8)
- #define OA_COP (11 << 8)
- #define OA_BASEOP_OR_UNOP (12 << 8)
- #define OA_FILESTATOP (13 << 8)
- #define OA_LOOPEXOP (14 << 8)
-
- #define OASHIFT 12
-
- /* 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
-
-