3 * Copyright (c) 1991-1999, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * The fields of BASEOP are:
12 * op_next Pointer to next ppcode to execute after this one.
13 * (Top level pre-grafted op points to first op,
14 * but this is replaced when op is grafted in, when
15 * this op will point to the real next op, and the new
16 * parent takes over role of remembering starting op.)
17 * op_ppaddr Pointer to current ppcode's function.
18 * op_type The type of the operation.
19 * op_flags Flags common to all operations. See OPf_* below.
20 * op_private Flags peculiar to a particular operation (BUT,
21 * by default, set to the number of children until
22 * the operation is privatized by a check routine,
23 * which may or may not check number of children).
26 typedef U32 PADOFFSET;
27 #define NOT_IN_PAD ((PADOFFSET) -1)
35 #ifdef BASEOP_DEFINITION
36 #define BASEOP BASEOP_DEFINITION
41 OP* (CPERLscope(*op_ppaddr))(pTHX); \
49 #define OP_GIMME(op,dfl) \
50 (((op)->op_flags & OPf_WANT) == OPf_WANT_VOID ? G_VOID : \
51 ((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \
52 ((op)->op_flags & OPf_WANT) == OPf_WANT_LIST ? G_ARRAY : \
55 #define GIMME_V OP_GIMME(PL_op, block_gimme())
59 #define OPf_WANT 3 /* Mask for "want" bits: */
60 #define OPf_WANT_VOID 1 /* Want nothing */
61 #define OPf_WANT_SCALAR 2 /* Want single value */
62 #define OPf_WANT_LIST 3 /* Want list of any length */
63 #define OPf_KIDS 4 /* There is a firstborn child. */
64 #define OPf_PARENS 8 /* This operator was parenthesized. */
65 /* (Or block needs explicit scope entry.) */
66 #define OPf_REF 16 /* Certified reference. */
67 /* (Return container, not containee). */
68 #define OPf_MOD 32 /* Will modify (lvalue). */
69 #define OPf_STACKED 64 /* Some arg is arriving on the stack. */
70 #define OPf_SPECIAL 128 /* Do something weird for this op: */
71 /* On local LVAL, don't init local value. */
72 /* On OP_SORT, subroutine is inlined. */
73 /* On OP_NOT, inversion was implicit. */
74 /* On OP_LEAVE, don't restore curpm. */
75 /* On truncate, we truncate filehandle */
76 /* On control verbs, we saw no label */
77 /* On flipflop, we saw ... instead of .. */
78 /* On UNOPs, saw bare parens, e.g. eof(). */
79 /* On OP_ENTERSUB || OP_NULL, saw a "do". */
80 /* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */
81 /* On OP_ENTERITER, loop var is per-thread */
82 /* On pushre, re is /\s+/ imp. by split " " */
84 /* old names; don't use in new code, but don't break them, either */
85 #define OPf_LIST OPf_WANT_LIST
86 #define OPf_KNOW OPf_WANT
88 (PL_op->op_flags & OPf_WANT \
89 ? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \
94 /* Private for lvalues */
95 #define OPpLVAL_INTRO 128 /* Lvalue must be localized or lvalue sub */
97 /* Private for OP_AASSIGN */
98 #define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */
100 /* Private for OP_SASSIGN */
101 #define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */
103 /* Private for OP_MATCH and OP_SUBST{,CONST} */
104 #define OPpRUNTIME 64 /* Pattern coming in on the stack */
106 /* Private for OP_TRANS */
107 #define OPpTRANS_FROM_UTF 1
108 #define OPpTRANS_TO_UTF 2
109 #define OPpTRANS_IDENTICAL 4
110 /* When CU or UC, means straight latin-1 to utf-8 or vice versa */
111 /* Otherwise, IDENTICAL means the right side is the same as the left */
112 #define OPpTRANS_SQUASH 8
113 #define OPpTRANS_DELETE 16
114 #define OPpTRANS_COMPLEMENT 32
115 #define OPpTRANS_GROWS 64
117 /* Private for OP_REPEAT */
118 #define OPpREPEAT_DOLIST 64 /* List replication. */
120 /* Private for OP_RV2?V, OP_?ELEM */
121 #define OPpDEREF (32|64) /* Want ref to something: */
122 #define OPpDEREF_AV 32 /* Want ref to AV. */
123 #define OPpDEREF_HV 64 /* Want ref to HV. */
124 #define OPpDEREF_SV (32|64) /* Want ref to SV. */
125 /* OP_ENTERSUB only */
126 #define OPpENTERSUB_DB 16 /* Debug subroutine. */
127 #define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */
129 #define OPpENTERSUB_AMPER 8 /* Used & form to call. */
130 #define OPpENTERSUB_NOPAREN 128 /* bare sub call (without parens) */
131 #define OPpENTERSUB_INARGS 4 /* Lval used as arg to a sub. */
133 #define OPpEARLY_CV 32 /* foo() called before sub foo was parsed */
135 #define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */
136 /* for OP_RV2?V, lower bits carry hints */
138 /* Private for OPs with TARGLEX */
139 /* (lower bits may carry MAXARG) */
140 #define OPpTARGET_MY 16 /* Target is PADMY. */
142 /* Private for OP_CONST */
143 #define OPpCONST_STRICT 8 /* bearword subject to strict 'subs' */
144 #define OPpCONST_ENTERED 16 /* Has been entered as symbol. */
145 #define OPpCONST_ARYBASE 32 /* Was a $[ translated to constant. */
146 #define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */
147 #define OPpCONST_WARNING 128 /* Was a $^W translated to constant. */
149 /* Private for OP_FLIP/FLOP */
150 #define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */
152 /* Private for OP_LIST */
153 #define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */
155 /* Private for OP_DELETE */
156 #define OPpSLICE 64 /* Operating on a list of keys */
158 /* Private for OP_SORT, OP_PRTF, OP_SPRINTF, string cmp'n, and case changers */
159 #define OPpLOCALE 64 /* Use locale */
161 /* Private for OP_SORT */
162 #define OPpSORT_NUMERIC 1 /* Optimized away { $a <=> $b } */
163 #define OPpSORT_INTEGER 2 /* Ditto while under "use integer" */
164 #define OPpSORT_REVERSE 4 /* Descending sort */
165 /* Private for OP_THREADSV */
166 #define OPpDONE_SVREF 64 /* Been through newSVREF once */
203 PMOP * op_pmnext; /* list of all scanpats */
204 REGEXP * op_pmregexp; /* compiled expression */
210 #define PMdf_USED 0x01 /* pm has been used once already */
211 #define PMdf_TAINTED 0x02 /* pm compiled from tainted pattern */
213 #define PMf_RETAINT 0x0001 /* taint $1 etc. if target tainted */
214 #define PMf_ONCE 0x0002 /* use pattern only once per reset */
215 #define PMf_REVERSED 0x0004 /* Should be matched right->left */
216 #define PMf_MAYBE_CONST 0x0008 /* replacement contains variables */
217 #define PMf_SKIPWHITE 0x0010 /* skip leading whitespace for split */
218 #define PMf_WHITE 0x0020 /* pattern is \s+ */
219 #define PMf_CONST 0x0040 /* subst replacement is constant */
220 #define PMf_KEEP 0x0080 /* keep 1st runtime pattern forever */
221 #define PMf_GLOBAL 0x0100 /* pattern had a g modifier */
222 #define PMf_CONTINUE 0x0200 /* don't reset pos() if //g fails */
223 #define PMf_EVAL 0x0400 /* evaluating replacement as expr */
224 #define PMf_LOCALE 0x0800 /* use locale for character types */
225 #define PMf_MULTILINE 0x1000 /* assume multiple lines */
226 #define PMf_SINGLELINE 0x2000 /* assume single line */
227 #define PMf_FOLD 0x4000 /* case insensitivity */
228 #define PMf_EXTENDED 0x8000 /* chuck embedded whitespace */
230 /* mask of bits stored in regexp->reganch */
231 #define PMf_COMPILETIME (PMf_MULTILINE|PMf_SINGLELINE|PMf_LOCALE|PMf_FOLD|PMf_EXTENDED)
258 #define cUNOP ((UNOP*)PL_op)
259 #define cBINOP ((BINOP*)PL_op)
260 #define cLISTOP ((LISTOP*)PL_op)
261 #define cLOGOP ((LOGOP*)PL_op)
262 #define cPMOP ((PMOP*)PL_op)
263 #define cSVOP ((SVOP*)PL_op)
264 #define cGVOP ((GVOP*)PL_op)
265 #define cPVOP ((PVOP*)PL_op)
266 #define cCOP ((COP*)PL_op)
267 #define cLOOP ((LOOP*)PL_op)
269 #define cUNOPo ((UNOP*)o)
270 #define cBINOPo ((BINOP*)o)
271 #define cLISTOPo ((LISTOP*)o)
272 #define cLOGOPo ((LOGOP*)o)
273 #define cPMOPo ((PMOP*)o)
274 #define cSVOPo ((SVOP*)o)
275 #define cGVOPo ((GVOP*)o)
276 #define cPVOPo ((PVOP*)o)
277 #define cCVOPo ((CVOP*)o)
278 #define cCOPo ((COP*)o)
279 #define cLOOPo ((LOOP*)o)
281 #define kUNOP ((UNOP*)kid)
282 #define kBINOP ((BINOP*)kid)
283 #define kLISTOP ((LISTOP*)kid)
284 #define kLOGOP ((LOGOP*)kid)
285 #define kPMOP ((PMOP*)kid)
286 #define kSVOP ((SVOP*)kid)
287 #define kGVOP ((GVOP*)kid)
288 #define kPVOP ((PVOP*)kid)
289 #define kCOP ((COP*)kid)
290 #define kLOOP ((LOOP*)kid)
292 #define Nullop Null(OP*)
294 /* Lowest byte of PL_opargs */
296 #define OA_FOLDCONST 2
297 #define OA_RETSCALAR 4
299 #define OA_RETINTEGER 16
300 #define OA_OTHERINT 32
301 #define OA_DANGEROUS 64
303 #define OA_TARGLEX 256
305 /* The next 4 bits encode op class information */
308 #define OA_CLASS_MASK (15 << OCSHIFT)
310 #define OA_BASEOP (0 << OCSHIFT)
311 #define OA_UNOP (1 << OCSHIFT)
312 #define OA_BINOP (2 << OCSHIFT)
313 #define OA_LOGOP (3 << OCSHIFT)
314 #define OA_LISTOP (4 << OCSHIFT)
315 #define OA_PMOP (5 << OCSHIFT)
316 #define OA_SVOP (6 << OCSHIFT)
317 #define OA_GVOP (7 << OCSHIFT)
318 #define OA_PVOP_OR_SVOP (8 << OCSHIFT)
319 #define OA_LOOP (9 << OCSHIFT)
320 #define OA_COP (10 << OCSHIFT)
321 #define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
322 #define OA_FILESTATOP (12 << OCSHIFT)
323 #define OA_LOOPEXOP (13 << OCSHIFT)
327 /* Remaining nybbles of PL_opargs */
334 #define OA_SCALARREF 7
335 #define OA_OPTIONAL 8