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fix many s/// tainting bugs
[perl5.git] / op.h
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a0d0e21e 1/* op.h
79072805 2 *
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3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
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5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
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9 */
10
11/*
12 * The fields of BASEOP are:
13 * op_next Pointer to next ppcode to execute after this one.
14 * (Top level pre-grafted op points to first op,
15 * but this is replaced when op is grafted in, when
16 * this op will point to the real next op, and the new
17 * parent takes over role of remembering starting op.)
18 * op_ppaddr Pointer to current ppcode's function.
19 * op_type The type of the operation.
2814eb74
PJ
20 * op_opt Whether or not the op has been optimised by the
21 * peephole optimiser.
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22 *
23 * See the comments in S_clear_yystack() for more
24 * details on the following three flags:
85594c31 25 *
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26 * op_latefree tell op_free() to clear this op (and free any kids)
27 * but not yet deallocate the struct. This means that
28 * the op may be safely op_free()d multiple times
29 * op_latefreed an op_latefree op has been op_free()d
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30 * op_attached this op (sub)tree has been attached to a CV
31 *
85594c31 32 * op_spare three spare bits!
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33 * op_flags Flags common to all operations. See OPf_* below.
34 * op_private Flags peculiar to a particular operation (BUT,
35 * by default, set to the number of children until
36 * the operation is privatized by a check routine,
37 * which may or may not check number of children).
38 */
1850c8f9 39#include "op_reg_common.h"
79072805 40
79072805 41#define OPCODE U16
79072805 42
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43#ifdef PERL_MAD
44# define MADPROP_IN_BASEOP MADPROP* op_madprop;
45#else
46# define MADPROP_IN_BASEOP
47#endif
48
61a59f30 49typedef PERL_BITFIELD16 Optype;
0053d415 50
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51#ifdef BASEOP_DEFINITION
52#define BASEOP BASEOP_DEFINITION
53#else
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54#define BASEOP \
55 OP* op_next; \
56 OP* op_sibling; \
16c91539 57 OP* (*op_ppaddr)(pTHX); \
598921a7 58 MADPROP_IN_BASEOP \
79072805 59 PADOFFSET op_targ; \
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60 PERL_BITFIELD16 op_type:9; \
61 PERL_BITFIELD16 op_opt:1; \
62 PERL_BITFIELD16 op_latefree:1; \
63 PERL_BITFIELD16 op_latefreed:1; \
64 PERL_BITFIELD16 op_attached:1; \
65 PERL_BITFIELD16 op_spare:3; \
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66 U8 op_flags; \
67 U8 op_private;
0f4eea8f 68#endif
79072805 69
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70/* If op_type:9 is changed to :10, also change PUSHEVAL in cop.h.
71 Also, if the type of op_type is ever changed (e.g. to PERL_BITFIELD32)
72 then all the other bit-fields before/after it should change their
73 types too to let VC pack them into the same 4 byte integer.*/
17347a51 74
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PP
75#define OP_GIMME(op,dfl) \
76 (((op)->op_flags & OPf_WANT) == OPf_WANT_VOID ? G_VOID : \
77 ((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \
78 ((op)->op_flags & OPf_WANT) == OPf_WANT_LIST ? G_ARRAY : \
79 dfl)
80
2f8edad0 81#define OP_GIMME_REVERSE(flags) ((flags) & G_WANT)
4f911530 82
954c1994 83/*
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84=head1 "Gimme" Values
85
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86=for apidoc Amn|U32|GIMME_V
87The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>,
91e74348 88C<G_SCALAR> or C<G_ARRAY> for void, scalar or list context,
683d9ad1 89respectively. See L<perlcall> for a usage example.
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90
91=for apidoc Amn|U32|GIMME
92A backward-compatible version of C<GIMME_V> which can only return
93C<G_SCALAR> or C<G_ARRAY>; in a void context, it returns C<G_SCALAR>.
94Deprecated. Use C<GIMME_V> instead.
95
96=cut
97*/
98
533c011a 99#define GIMME_V OP_GIMME(PL_op, block_gimme())
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100
101/* Public flags */
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102
103#define OPf_WANT 3 /* Mask for "want" bits: */
104#define OPf_WANT_VOID 1 /* Want nothing */
105#define OPf_WANT_SCALAR 2 /* Want single value */
106#define OPf_WANT_LIST 3 /* Want list of any length */
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107#define OPf_KIDS 4 /* There is a firstborn child. */
108#define OPf_PARENS 8 /* This operator was parenthesized. */
463ee0b2 109 /* (Or block needs explicit scope entry.) */
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110#define OPf_REF 16 /* Certified reference. */
111 /* (Return container, not containee). */
112#define OPf_MOD 32 /* Will modify (lvalue). */
113#define OPf_STACKED 64 /* Some arg is arriving on the stack. */
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114#define OPf_SPECIAL 128 /* Do something weird for this op: */
115 /* On local LVAL, don't init local value. */
116 /* On OP_SORT, subroutine is inlined. */
117 /* On OP_NOT, inversion was implicit. */
a0d0e21e 118 /* On OP_LEAVE, don't restore curpm. */
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119 /* On truncate, we truncate filehandle */
120 /* On control verbs, we saw no label */
121 /* On flipflop, we saw ... instead of .. */
122 /* On UNOPs, saw bare parens, e.g. eof(). */
a0d0e21e 123 /* On OP_ENTERSUB || OP_NULL, saw a "do". */
afebc493 124 /* On OP_EXISTS, treat av as av, not avhv. */
f2ec2afd 125 /* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */
0ac6acae 126 /* On pushre, rx is used as part of split, e.g. split " " */
497711e7 127 /* On regcomp, "use re 'eval'" was in scope */
7c6fadd6 128 /* On OP_READLINE, was <$filehandle> */
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129 /* On RV2[ACGHS]V, don't create GV--in
130 defined()*/
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131 /* On OP_DBSTATE, indicates breakpoint
132 * (runtime property) */
486ec47a 133 /* On OP_AELEMFAST, indicates pad var */
6b514a0d 134 /* On OP_REQUIRE, was seen as CORE::require */
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135 /* On OP_ENTERWHEN, there's no condition */
136 /* On OP_BREAK, an implicit break */
137 /* On OP_SMARTMATCH, an implicit smartmatch */
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138 /* On OP_ANONHASH and OP_ANONLIST, create a
139 reference to the new anon hash or array */
e91684bf 140 /* On OP_ENTER, store caller context */
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141 /* On OP_HELEM and OP_HSLICE, localization will be followed
142 by assignment, so do not wipe the target if it is special
143 (e.g. a glob or a magic SV) */
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144 /* On OP_MATCH, OP_SUBST & OP_TRANS, the
145 operand of a logical or conditional
146 that was optimised away, so it should
147 not be bound via =~ */
6b7c6d95 148 /* On OP_CONST, from a constant CV */
d1bea3d8 149 /* On OP_GLOB, use Perl glob function */
79072805 150
54310121 151/* old names; don't use in new code, but don't break them, either */
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152#define OPf_LIST OPf_WANT_LIST
153#define OPf_KNOW OPf_WANT
954c1994 154
54310121 155#define GIMME \
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156 (PL_op->op_flags & OPf_WANT \
157 ? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \
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158 ? G_ARRAY \
159 : G_SCALAR) \
160 : dowantarray())
54310121 161
51a68671 162/* NOTE: OP_NEXTSTATE and OP_DBSTATE (i.e. COPs) carry lower
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163 * bits of PL_hints in op_private */
164
a0d0e21e 165/* Private for lvalues */
cd06dffe 166#define OPpLVAL_INTRO 128 /* Lvalue must be localized or lvalue sub */
a0d0e21e 167
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168/* Private for OP_LEAVE, OP_LEAVESUB, OP_LEAVESUBLV and OP_LEAVEWRITE */
169#define OPpREFCOUNTED 64 /* op_targ carries a refcount */
170
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171/* Private for OP_AASSIGN */
172#define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */
173
174/* Private for OP_SASSIGN */
175#define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */
e26df76a 176#define OPpASSIGN_CV_TO_GV 128 /* Possible optimisation for constants. */
79072805 177
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178/* Private for OP_MATCH and OP_SUBST{,CONST} */
179#define OPpRUNTIME 64 /* Pattern coming in on the stack */
180
79072805 181/* Private for OP_TRANS */
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182#define OPpTRANS_FROM_UTF 1
183#define OPpTRANS_TO_UTF 2
383e7cdd 184#define OPpTRANS_IDENTICAL 4 /* right side is same as left */
4757a243 185#define OPpTRANS_SQUASH 8
59f00321 186 /* 16 is used for OPpTARGET_MY */
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187#define OPpTRANS_COMPLEMENT 32
188#define OPpTRANS_GROWS 64
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189#define OPpTRANS_DELETE 128
190#define OPpTRANS_ALL (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF|OPpTRANS_IDENTICAL|OPpTRANS_SQUASH|OPpTRANS_COMPLEMENT|OPpTRANS_GROWS|OPpTRANS_DELETE)
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191
192/* Private for OP_REPEAT */
a0d0e21e 193#define OPpREPEAT_DOLIST 64 /* List replication. */
79072805 194
cf2dc985 195/* Private for OP_RV2GV, OP_RV2SV, OP_AELEM, OP_HELEM, OP_PADSV */
314d4778 196#define OPpDEREF (32|64) /* autovivify: Want ref to something: */
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197#define OPpDEREF_AV 32 /* Want ref to AV. */
198#define OPpDEREF_HV 64 /* Want ref to HV. */
199#define OPpDEREF_SV (32|64) /* Want ref to SV. */
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200/* Private for OP_RV2SV, OP_RV2AV, OP_RV2AV */
201#define OPpDEREFed 4 /* prev op was OPpDEREF */
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202 /* OP_ENTERSUB only */
203#define OPpENTERSUB_DB 16 /* Debug subroutine. */
d3011074 204#define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */
3ad73efd 205#define OPpENTERSUB_NOMOD 64 /* Immune to op_lvalue() for :attrlist. */
b900987b 206 /* OP_ENTERSUB and OP_RV2CV only */
68dc0745 207#define OPpENTERSUB_AMPER 8 /* Used & form to call. */
9675f7ac 208#define OPpENTERSUB_NOPAREN 128 /* bare sub call (without parens) */
cd06dffe 209#define OPpENTERSUB_INARGS 4 /* Lval used as arg to a sub. */
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210 /* OP_GV only */
211#define OPpEARLY_CV 32 /* foo() called before sub foo was parsed */
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212 /* OP_?ELEM only */
213#define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */
241416b8 214 /* OP_RV2?V, OP_GVSV, OP_ENTERITER only */
78f9721b 215#define OPpOUR_INTRO 16 /* Variable was in an our() */
cb0d96b9 216 /* OP_RV2[AGH]V, OP_PAD[AH]V, OP_[AH]ELEM */
78f9721b 217#define OPpMAYBE_LVSUB 8 /* We might be an lvalue to return */
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218 /* OP_PADSV only */
219#define OPpPAD_STATE 16 /* is a "state" pad */
192587c2 220 /* for OP_RV2?V, lower bits carry hints (currently only HINT_STRICT_REFS) */
79072805 221
e26df76a 222 /* OP_RV2GV only */
cb0d96b9 223#define OPpDONT_INIT_GV 4 /* Call gv_fetchpv with GV_NOINIT */
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224/* (Therefore will return whatever is currently in the symbol table, not
225 guaranteed to be a PVGV) */
226
227 /* OP_RV2CV only */
228#define OPpMAY_RETURN_CONSTANT 1 /* If a constant sub, return the constant */
229
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230/* Private for OPs with TARGLEX */
231 /* (lower bits may carry MAXARG) */
232#define OPpTARGET_MY 16 /* Target is PADMY. */
233
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234/* Private for OP_ENTERITER and OP_ITER */
235#define OPpITER_REVERSED 4 /* for (reverse ...) */
0d863452 236#define OPpITER_DEF 8 /* for $_ or for my $_ */
ef3e5ea9 237
79072805 238/* Private for OP_CONST */
468aa647 239#define OPpCONST_NOVER 2 /* no 6; */
e7fec78e 240#define OPpCONST_SHORTCIRCUIT 4 /* eg the constant 5 in (5 || foo) */
486ec47a 241#define OPpCONST_STRICT 8 /* bareword subject to strict 'subs' */
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242#define OPpCONST_ENTERED 16 /* Has been entered as symbol. */
243#define OPpCONST_ARYBASE 32 /* Was a $[ translated to constant. */
a0d0e21e 244#define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */
599cee73 245#define OPpCONST_WARNING 128 /* Was a $^W translated to constant. */
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246
247/* Private for OP_FLIP/FLOP */
a0d0e21e 248#define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */
79072805 249
ed6116ce 250/* Private for OP_LIST */
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251#define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */
252
5f05dabc 253/* Private for OP_DELETE */
54310121 254#define OPpSLICE 64 /* Operating on a list of keys */
7332a6c4 255/* Also OPpLVAL_INTRO (128) */
5f05dabc 256
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257/* Private for OP_EXISTS */
258#define OPpEXISTS_SUB 64 /* Checking for &sub, not {} or []. */
259
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260/* Private for OP_SORT */
261#define OPpSORT_NUMERIC 1 /* Optimized away { $a <=> $b } */
262#define OPpSORT_INTEGER 2 /* Ditto while under "use integer" */
eb209983 263#define OPpSORT_REVERSE 4 /* Reversed sort */
fe1bc4cf 264#define OPpSORT_INPLACE 8 /* sort in-place; eg @a = sort @a */
eb209983 265#define OPpSORT_DESCEND 16 /* Descending sort */
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266#define OPpSORT_QSORT 32 /* Use quicksort (not mergesort) */
267#define OPpSORT_STABLE 64 /* Use a stable algorithm */
268
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269/* Private for OP_REVERSE */
270#define OPpREVERSE_INPLACE 8 /* reverse in-place (@a = reverse @a) */
271
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272/* Private for OP_OPEN and OP_BACKTICK */
273#define OPpOPEN_IN_RAW 16 /* binmode(F,":raw") on input fh */
274#define OPpOPEN_IN_CRLF 32 /* binmode(F,":crlf") on input fh */
275#define OPpOPEN_OUT_RAW 64 /* binmode(F,":raw") on output fh */
276#define OPpOPEN_OUT_CRLF 128 /* binmode(F,":crlf") on output fh */
277
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278/* Private for OP_EXIT, HUSH also for OP_DIE */
279#define OPpHUSH_VMSISH 64 /* hush DCL exit msg vmsish mode*/
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280#define OPpEXIT_VMSISH 128 /* exit(0) vs. exit(1) vmsish mode*/
281
0d863452 282/* Private for OP_FTXXX */
1af34c76 283#define OPpFT_ACCESS 2 /* use filetest 'access' */
fbb0b3b3 284#define OPpFT_STACKED 4 /* stacked filetest, as in "-f -x $f" */
1af34c76 285
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286/* Private for OP_(MAP|GREP)(WHILE|START) */
287#define OPpGREP_LEX 2 /* iterate over lexical $_ */
288
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289/* Private for OP_ENTEREVAL */
290#define OPpEVAL_HAS_HH 2 /* Does it have a copy of %^H */
291
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292struct op {
293 BASEOP
294};
295
296struct unop {
297 BASEOP
298 OP * op_first;
299};
300
301struct binop {
302 BASEOP
303 OP * op_first;
304 OP * op_last;
305};
306
307struct logop {
308 BASEOP
309 OP * op_first;
310 OP * op_other;
311};
312
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313struct listop {
314 BASEOP
315 OP * op_first;
316 OP * op_last;
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317};
318
319struct pmop {
320 BASEOP
321 OP * op_first;
322 OP * op_last;
1fcf4c12 323#ifdef USE_ITHREADS
fd1bc7eb 324 IV op_pmoffset;
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325#else
326 REGEXP * op_pmregexp; /* compiled expression */
327#endif
69bdead3 328 U32 op_pmflags;
29f2e912 329 union {
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330 OP * op_pmreplroot; /* For OP_SUBST */
331#ifdef USE_ITHREADS
332 PADOFFSET op_pmtargetoff; /* For OP_PUSHRE */
333#else
334 GV * op_pmtargetgv;
335#endif
336 } op_pmreplrootu;
337 union {
29f2e912 338 OP * op_pmreplstart; /* Only used in OP_SUBST */
cb55de95 339#ifdef USE_ITHREADS
29f2e912 340 char * op_pmstashpv; /* Only used in OP_MATCH, with PMf_ONCE set */
cb55de95 341#else
29f2e912 342 HV * op_pmstash;
cb55de95 343#endif
29f2e912 344 } op_pmstashstartu;
79072805 345};
a0d0e21e 346
1fcf4c12 347#ifdef USE_ITHREADS
14a49a24
NC
348#define PM_GETRE(o) (SvTYPE(PL_regex_pad[(o)->op_pmoffset]) == SVt_REGEXP \
349 ? (REGEXP*)(PL_regex_pad[(o)->op_pmoffset]) : NULL)
ede1273d
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350/* The assignment is just to enforce type safety (or at least get a warning).
351 */
14a49a24
NC
352/* With first class regexps not via a reference one needs to assign
353 &PL_sv_undef under ithreads. (This would probably work unthreaded, but NULL
354 is cheaper. I guess we could allow NULL, but the check above would get
355 more complex, and we'd have an AV with (SV*)NULL in it, which feels bad */
356/* BEWARE - something that calls this macro passes (r) which has a side
357 effect. */
ede1273d 358#define PM_SETRE(o,r) STMT_START { \
b1bc3f34 359 REGEXP *const _pm_setre = (r); \
7948fc08 360 assert(_pm_setre); \
b1bc3f34 361 PL_regex_pad[(o)->op_pmoffset] = MUTABLE_SV(_pm_setre); \
ede1273d 362 } STMT_END
1fcf4c12 363#else
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AB
364#define PM_GETRE(o) ((o)->op_pmregexp)
365#define PM_SETRE(o,r) ((o)->op_pmregexp = (r))
1fcf4c12 366#endif
4825b64b 367
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368/* Leave some space, so future bit allocations can go either in the shared or
369 * unshared area without affecting binary compatibility */
df7a8460 370#define PMf_BASE_SHIFT (_RXf_PMf_SHIFT_NEXT+6)
f4a4cecb 371
1850c8f9 372/* taint $1 etc. if target tainted */
1ad4ec54 373#define PMf_RETAINT (1<<(PMf_BASE_SHIFT+0))
c737faaf 374
c0f1c194
KW
375/* match successfully only once per reset, with related flag RXf_USED in
376 * re->extflags holding state. This is used only for ?? matches, and only on
377 * OP_MATCH and OP_QR */
1ad4ec54 378#define PMf_ONCE (1<<(PMf_BASE_SHIFT+1))
1850c8f9
KW
379
380/* replacement contains variables */
1ad4ec54 381#define PMf_MAYBE_CONST (1<<(PMf_BASE_SHIFT+2))
1850c8f9
KW
382
383/* PMf_ONCE has matched successfully. Not used under threading. */
1ad4ec54 384#define PMf_USED (1<<(PMf_BASE_SHIFT+3))
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KW
385
386/* subst replacement is constant */
1ad4ec54 387#define PMf_CONST (1<<(PMf_BASE_SHIFT+4))
c737faaf 388
1850c8f9 389/* keep 1st runtime pattern forever */
1ad4ec54 390#define PMf_KEEP (1<<(PMf_BASE_SHIFT+5))
4da3eb8b 391
1ad4ec54 392#define PMf_GLOBAL (1<<(PMf_BASE_SHIFT+6)) /* pattern had a g modifier */
c737faaf 393
1850c8f9 394/* don't reset pos() if //g fails */
1ad4ec54 395#define PMf_CONTINUE (1<<(PMf_BASE_SHIFT+7))
1850c8f9
KW
396
397/* evaluating replacement as expr */
1ad4ec54 398#define PMf_EVAL (1<<(PMf_BASE_SHIFT+8))
c0f1c194
KW
399
400/* Return substituted string instead of modifying it. */
1ad4ec54 401#define PMf_NONDESTRUCT (1<<(PMf_BASE_SHIFT+9))
e357fc67 402
1ad4ec54 403#if PMf_BASE_SHIFT+9 > 31
32cdcf9d 404# error Too many PMf_ bits used. See above and regnodes.h for any spare in middle
1850c8f9 405#endif
79072805 406
cb55de95 407#ifdef USE_ITHREADS
05ec9bb3 408
29f2e912
NC
409# define PmopSTASHPV(o) \
410 (((o)->op_pmflags & PMf_ONCE) ? (o)->op_pmstashstartu.op_pmstashpv : NULL)
411# if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
412# define PmopSTASHPV_set(o,pv) ({ \
413 assert((o)->op_pmflags & PMf_ONCE); \
414 ((o)->op_pmstashstartu.op_pmstashpv = savesharedpv(pv)); \
415 })
416# else
417# define PmopSTASHPV_set(o,pv) \
418 ((o)->op_pmstashstartu.op_pmstashpv = savesharedpv(pv))
419# endif
cb55de95 420# define PmopSTASH(o) (PmopSTASHPV(o) \
29f2e912 421 ? gv_stashpv((o)->op_pmstashstartu.op_pmstashpv,GV_ADD) : NULL)
bd61b366 422# define PmopSTASH_set(o,hv) PmopSTASHPV_set(o, ((hv) ? HvNAME_get(hv) : NULL))
05ec9bb3
NIS
423# define PmopSTASH_free(o) PerlMemShared_free(PmopSTASHPV(o))
424
cb55de95 425#else
29f2e912
NC
426# define PmopSTASH(o) \
427 (((o)->op_pmflags & PMf_ONCE) ? (o)->op_pmstashstartu.op_pmstash : NULL)
428# if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
429# define PmopSTASH_set(o,hv) ({ \
430 assert((o)->op_pmflags & PMf_ONCE); \
431 ((o)->op_pmstashstartu.op_pmstash = (hv)); \
432 })
433# else
434# define PmopSTASH_set(o,hv) ((o)->op_pmstashstartu.op_pmstash = (hv))
435# endif
bd61b366 436# define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME_get(PmopSTASH(o)) : NULL)
29f2e912 437 /* op_pmstashstartu.op_pmstash is not refcounted */
cb55de95 438# define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD))
c4bd3ae5
NC
439/* Note that if this becomes non-empty, then S_forget_pmop in op.c will need
440 changing */
05ec9bb3 441# define PmopSTASH_free(o)
cb55de95
JH
442#endif
443
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LW
444struct svop {
445 BASEOP
446 SV * op_sv;
447};
448
7934575e 449struct padop {
79072805 450 BASEOP
7934575e 451 PADOFFSET op_padix;
79072805
LW
452};
453
454struct pvop {
455 BASEOP
456 char * op_pv;
457};
458
79072805
LW
459struct loop {
460 BASEOP
461 OP * op_first;
462 OP * op_last;
79072805
LW
463 OP * op_redoop;
464 OP * op_nextop;
465 OP * op_lastop;
466};
467
350de78d
GS
468#define cUNOPx(o) ((UNOP*)o)
469#define cBINOPx(o) ((BINOP*)o)
470#define cLISTOPx(o) ((LISTOP*)o)
471#define cLOGOPx(o) ((LOGOP*)o)
472#define cPMOPx(o) ((PMOP*)o)
473#define cSVOPx(o) ((SVOP*)o)
474#define cPADOPx(o) ((PADOP*)o)
475#define cPVOPx(o) ((PVOP*)o)
476#define cCOPx(o) ((COP*)o)
477#define cLOOPx(o) ((LOOP*)o)
478
479#define cUNOP cUNOPx(PL_op)
480#define cBINOP cBINOPx(PL_op)
481#define cLISTOP cLISTOPx(PL_op)
482#define cLOGOP cLOGOPx(PL_op)
483#define cPMOP cPMOPx(PL_op)
484#define cSVOP cSVOPx(PL_op)
485#define cPADOP cPADOPx(PL_op)
486#define cPVOP cPVOPx(PL_op)
487#define cCOP cCOPx(PL_op)
488#define cLOOP cLOOPx(PL_op)
489
490#define cUNOPo cUNOPx(o)
491#define cBINOPo cBINOPx(o)
492#define cLISTOPo cLISTOPx(o)
493#define cLOGOPo cLOGOPx(o)
494#define cPMOPo cPMOPx(o)
495#define cSVOPo cSVOPx(o)
496#define cPADOPo cPADOPx(o)
497#define cPVOPo cPVOPx(o)
498#define cCOPo cCOPx(o)
499#define cLOOPo cLOOPx(o)
500
501#define kUNOP cUNOPx(kid)
502#define kBINOP cBINOPx(kid)
503#define kLISTOP cLISTOPx(kid)
504#define kLOGOP cLOGOPx(kid)
505#define kPMOP cPMOPx(kid)
506#define kSVOP cSVOPx(kid)
507#define kPADOP cPADOPx(kid)
508#define kPVOP cPVOPx(kid)
509#define kCOP cCOPx(kid)
510#define kLOOP cLOOPx(kid)
511
512
513#ifdef USE_ITHREADS
dd2155a4 514# define cGVOPx_gv(o) ((GV*)PAD_SVl(cPADOPx(o)->op_padix))
cecf5685
NC
515# define IS_PADGV(v) (v && SvTYPE(v) == SVt_PVGV && isGV_with_GP(v) \
516 && GvIN_PAD(v))
7766f137
GS
517# define IS_PADCONST(v) (v && SvREADONLY(v))
518# define cSVOPx_sv(v) (cSVOPx(v)->op_sv \
dd2155a4 519 ? cSVOPx(v)->op_sv : PAD_SVl((v)->op_targ))
638eceb6 520# define cSVOPx_svp(v) (cSVOPx(v)->op_sv \
dd2155a4 521 ? &cSVOPx(v)->op_sv : &PAD_SVl((v)->op_targ))
350de78d 522#else
638eceb6 523# define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv)
743e66e6 524# define IS_PADGV(v) FALSE
7766f137
GS
525# define IS_PADCONST(v) FALSE
526# define cSVOPx_sv(v) (cSVOPx(v)->op_sv)
638eceb6 527# define cSVOPx_svp(v) (&cSVOPx(v)->op_sv)
350de78d 528#endif
79072805 529
638eceb6
GS
530#define cGVOP_gv cGVOPx_gv(PL_op)
531#define cGVOPo_gv cGVOPx_gv(o)
532#define kGVOP_gv cGVOPx_gv(kid)
533#define cSVOP_sv cSVOPx_sv(PL_op)
534#define cSVOPo_sv cSVOPx_sv(o)
535#define kSVOP_sv cSVOPx_sv(kid)
7766f137 536
bcabcc50
NC
537#ifndef PERL_CORE
538# define Nullop ((OP*)NULL)
539#endif
79072805 540
91135acb 541/* Lowest byte-and-a-bit of PL_opargs */
a0d0e21e
LW
542#define OA_MARK 1
543#define OA_FOLDCONST 2
544#define OA_RETSCALAR 4
545#define OA_TARGET 8
903fd87c 546#define OA_TARGLEX 16
a0d0e21e
LW
547#define OA_OTHERINT 32
548#define OA_DANGEROUS 64
549#define OA_DEFGV 128
550
db173bac 551/* The next 4 bits encode op class information */
903fd87c 552#define OCSHIFT 8
b162f9ea
IZ
553
554#define OA_CLASS_MASK (15 << OCSHIFT)
555
556#define OA_BASEOP (0 << OCSHIFT)
557#define OA_UNOP (1 << OCSHIFT)
558#define OA_BINOP (2 << OCSHIFT)
559#define OA_LOGOP (3 << OCSHIFT)
1a67a97c
SM
560#define OA_LISTOP (4 << OCSHIFT)
561#define OA_PMOP (5 << OCSHIFT)
562#define OA_SVOP (6 << OCSHIFT)
7934575e 563#define OA_PADOP (7 << OCSHIFT)
1a67a97c
SM
564#define OA_PVOP_OR_SVOP (8 << OCSHIFT)
565#define OA_LOOP (9 << OCSHIFT)
566#define OA_COP (10 << OCSHIFT)
567#define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
568#define OA_FILESTATOP (12 << OCSHIFT)
569#define OA_LOOPEXOP (13 << OCSHIFT)
b162f9ea 570
903fd87c 571#define OASHIFT 12
a0d0e21e 572
4369b173 573/* Remaining nybbles of PL_opargs */
a0d0e21e
LW
574#define OA_SCALAR 1
575#define OA_LIST 2
576#define OA_AVREF 3
577#define OA_HVREF 4
578#define OA_CVREF 5
579#define OA_FILEREF 6
580#define OA_SCALARREF 7
581#define OA_OPTIONAL 8
582
d3c72c2a
DM
583/* Op_REFCNT is a reference count at the head of each op tree: needed
584 * since the tree is shared between threads, and between cloned closure
585 * copies in the same thread. OP_REFCNT_LOCK/UNLOCK is used when modifying
586 * this count.
587 * The same mutex is used to protect the refcounts of the reg_trie_data
588 * and reg_ac_data structures, which are shared between duplicated
589 * regexes.
590 */
591
534825c4
GS
592#ifdef USE_ITHREADS
593# define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex)
4026c95a
SH
594# ifdef PERL_CORE
595# define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex)
596# define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex)
597# else
598# define OP_REFCNT_LOCK op_refcnt_lock()
599# define OP_REFCNT_UNLOCK op_refcnt_unlock()
600# endif
534825c4 601# define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex)
534825c4
GS
602#else
603# define OP_REFCNT_INIT NOOP
604# define OP_REFCNT_LOCK NOOP
605# define OP_REFCNT_UNLOCK NOOP
606# define OP_REFCNT_TERM NOOP
534825c4 607#endif
e4783991 608
282f25c9 609#define OpREFCNT_set(o,n) ((o)->op_targ = (n))
fc97af9c
NC
610#ifdef PERL_DEBUG_READONLY_OPS
611# define OpREFCNT_inc(o) Perl_op_refcnt_inc(aTHX_ o)
612# define OpREFCNT_dec(o) Perl_op_refcnt_dec(aTHX_ o)
613#else
614# define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : NULL)
615# define OpREFCNT_dec(o) (--(o)->op_targ)
616#endif
282f25c9 617
e4783991 618/* flags used by Perl_load_module() */
ec6d81ab
RGS
619#define PERL_LOADMOD_DENY 0x1 /* no Module */
620#define PERL_LOADMOD_NOIMPORT 0x2 /* use Module () */
621#define PERL_LOADMOD_IMPORT_OPS 0x4 /* use Module (...) */
e5dd39fc 622
a0c21aa1 623#if defined(PERL_IN_PERLY_C) || defined(PERL_IN_OP_C)
e4c5ccf3 624#define ref(o, type) doref(o, type, TRUE)
a0c21aa1 625#endif
e4c5ccf3 626
5983a79d
BM
627/*
628=head1 Optree Manipulation Functions
629
630=for apidoc Am|OP*|LINKLIST|OP *o
631Given the root of an optree, link the tree in execution order using the
632C<op_next> pointers and return the first op executed. If this has
633already been done, it will not be redone, and C<< o->op_next >> will be
634returned. If C<< o->op_next >> is not already set, I<o> should be at
635least an C<UNOP>.
636
637=cut
638*/
639
640#define LINKLIST(o) ((o)->op_next ? (o)->op_next : op_linklist((OP*)o))
641
33f36c71
NC
642/* no longer used anywhere in core */
643#ifndef PERL_CORE
46471bde
NC
644#define cv_ckproto(cv, gv, p) \
645 cv_ckproto_len((cv), (gv), (p), (p) ? strlen(p) : 0)
33f36c71
NC
646#endif
647
7d0905b9
NC
648#ifdef PERL_CORE
649# define my(o) my_attrs((o), NULL)
650#endif
651
e5dd39fc 652#ifdef USE_REENTRANT_API
10bc17b6 653#include "reentr.h"
e5dd39fc
AB
654#endif
655
c7e45529
AE
656#if defined(PL_OP_SLAB_ALLOC)
657#define NewOp(m,var,c,type) \
e91d68d5 658 (var = (type *) Perl_Slab_Alloc(aTHX_ c*sizeof(type)))
c7e45529 659#define NewOpSz(m,var,size) \
e91d68d5 660 (var = (OP *) Perl_Slab_Alloc(aTHX_ size))
c7e45529
AE
661#define FreeOp(p) Perl_Slab_Free(aTHX_ p)
662#else
04e62e51
NC
663#define NewOp(m, var, c, type) \
664 (var = (MEM_WRAP_CHECK_(c,type) \
665 (type*)PerlMemShared_calloc(c, sizeof(type))))
113b9ccf 666#define NewOpSz(m, var, size) \
04e62e51
NC
667 (var = (OP*)PerlMemShared_calloc(1, size))
668#define FreeOp(p) PerlMemShared_free(p)
c7e45529 669#endif
598921a7 670
1930840b 671struct block_hooks {
52db365a 672 U32 bhk_flags;
1930840b
BM
673 void (*bhk_start) (pTHX_ int full);
674 void (*bhk_pre_end) (pTHX_ OP **seq);
675 void (*bhk_post_end) (pTHX_ OP **seq);
52db365a 676 void (*bhk_eval) (pTHX_ OP *const saveop);
1930840b
BM
677};
678
fd85fad2
BM
679/*
680=head1 Compile-time scope hooks
681
3e4ddde5 682=for apidoc mx|U32|BhkFLAGS|BHK *hk
fd85fad2
BM
683Return the BHK's flags.
684
3e4ddde5 685=for apidoc mx|void *|BhkENTRY|BHK *hk|which
fd85fad2
BM
686Return an entry from the BHK structure. I<which> is a preprocessor token
687indicating which entry to return. If the appropriate flag is not set
688this will return NULL. The type of the return value depends on which
689entry you ask for.
690
3e4ddde5 691=for apidoc Amx|void|BhkENTRY_set|BHK *hk|which|void *ptr
fd85fad2
BM
692Set an entry in the BHK structure, and set the flags to indicate it is
693valid. I<which> is a preprocessing token indicating which entry to set.
694The type of I<ptr> depends on the entry.
695
3e4ddde5 696=for apidoc Amx|void|BhkDISABLE|BHK *hk|which
a3e07c87
BM
697Temporarily disable an entry in this BHK structure, by clearing the
698appropriate flag. I<which> is a preprocessor token indicating which
699entry to disable.
700
3e4ddde5 701=for apidoc Amx|void|BhkENABLE|BHK *hk|which
a3e07c87
BM
702Re-enable an entry in this BHK structure, by setting the appropriate
703flag. I<which> is a preprocessor token indicating which entry to enable.
704This will assert (under -DDEBUGGING) if the entry doesn't contain a valid
705pointer.
706
3e4ddde5 707=for apidoc mx|void|CALL_BLOCK_HOOKS|which|arg
fd85fad2
BM
708Call all the registered block hooks for type I<which>. I<which> is a
709preprocessing token; the type of I<arg> depends on I<which>.
710
711=cut
712*/
713
52db365a
BM
714#define BhkFLAGS(hk) ((hk)->bhk_flags)
715
a88d97bf
BM
716#define BHKf_bhk_start 0x01
717#define BHKf_bhk_pre_end 0x02
718#define BHKf_bhk_post_end 0x04
719#define BHKf_bhk_eval 0x08
52db365a
BM
720
721#define BhkENTRY(hk, which) \
a88d97bf 722 ((BhkFLAGS(hk) & BHKf_ ## which) ? ((hk)->which) : NULL)
52db365a 723
a3e07c87
BM
724#define BhkENABLE(hk, which) \
725 STMT_START { \
726 BhkFLAGS(hk) |= BHKf_ ## which; \
727 assert(BhkENTRY(hk, which)); \
728 } STMT_END
729
730#define BhkDISABLE(hk, which) \
731 STMT_START { \
732 BhkFLAGS(hk) &= ~(BHKf_ ## which); \
733 } STMT_END
734
52db365a
BM
735#define BhkENTRY_set(hk, which, ptr) \
736 STMT_START { \
a88d97bf 737 (hk)->which = ptr; \
a3e07c87 738 BhkENABLE(hk, which); \
52db365a
BM
739 } STMT_END
740
1930840b
BM
741#define CALL_BLOCK_HOOKS(which, arg) \
742 STMT_START { \
743 if (PL_blockhooks) { \
744 I32 i; \
745 for (i = av_len(PL_blockhooks); i >= 0; i--) { \
746 SV *sv = AvARRAY(PL_blockhooks)[i]; \
52db365a 747 BHK *hk; \
1930840b
BM
748 \
749 assert(SvIOK(sv)); \
750 if (SvUOK(sv)) \
52db365a 751 hk = INT2PTR(BHK *, SvUVX(sv)); \
1930840b 752 else \
52db365a 753 hk = INT2PTR(BHK *, SvIVX(sv)); \
1930840b 754 \
52db365a 755 if (BhkENTRY(hk, which)) \
16c91539 756 BhkENTRY(hk, which)(aTHX_ arg); \
1930840b
BM
757 } \
758 } \
759 } STMT_END
760
d9088386
Z
761/* flags for rv2cv_op_cv */
762
763#define RV2CVOPCV_MARK_EARLY 0x00000001
764#define RV2CVOPCV_RETURN_NAME_GV 0x00000002
765
9733086d
BM
766/*
767=head1 Custom Operators
768
769=for apidoc Am|U32|XopFLAGS|XOP *xop
770Return the XOP's flags.
771
772=for apidoc Am||XopENTRY|XOP *xop|which
773Return a member of the XOP structure. I<which> is a cpp token indicating
774which entry to return. If the member is not set this will return a
775default value. The return type depends on I<which>.
776
777=for apidoc Am|void|XopENTRY_set|XOP *xop|which|value
778Set a member of the XOP structure. I<which> is a cpp token indicating
779which entry to set. See L<perlguts/"Custom Operators"> for details about
780the available members and how they are used.
781
782=for apidoc Am|void|XopDISABLE|XOP *xop|which
783Temporarily disable a member of the XOP, by clearing the appropriate flag.
784
785=for apidoc Am|void|XopENABLE|XOP *xop|which
786Reenable a member of the XOP which has been disabled.
787
788=cut
789*/
790
1830b3d9
BM
791struct custom_op {
792 U32 xop_flags;
793 const char *xop_name;
794 const char *xop_desc;
795 U32 xop_class;
796 void (*xop_peep)(pTHX_ OP *o, OP *oldop);
797};
798
799#define XopFLAGS(xop) ((xop)->xop_flags)
800
801#define XOPf_xop_name 0x01
802#define XOPf_xop_desc 0x02
803#define XOPf_xop_class 0x04
804#define XOPf_xop_peep 0x08
805
806#define XOPd_xop_name PL_op_name[OP_CUSTOM]
807#define XOPd_xop_desc PL_op_desc[OP_CUSTOM]
808#define XOPd_xop_class OA_BASEOP
809#define XOPd_xop_peep ((Perl_cpeep_t)0)
810
811#define XopENTRY_set(xop, which, to) \
812 STMT_START { \
813 (xop)->which = (to); \
814 (xop)->xop_flags |= XOPf_ ## which; \
815 } STMT_END
816
817#define XopENTRY(xop, which) \
818 ((XopFLAGS(xop) & XOPf_ ## which) ? (xop)->which : XOPd_ ## which)
819
820#define XopDISABLE(xop, which) ((xop)->xop_flags &= ~XOPf_ ## which)
821#define XopENABLE(xop, which) \
822 STMT_START { \
823 (xop)->xop_flags |= XOPf_ ## which; \
824 assert(XopENTRY(xop, which)); \
825 } STMT_END
826
9733086d
BM
827/*
828=head1 Optree Manipulation Functions
829
830=for apidoc Am|const char *|OP_NAME|OP *o
831Return the name of the provided OP. For core ops this looks up the name
832from the op_type; for custom ops from the op_ppaddr.
833
834=for apidoc Am|const char *|OP_DESC|OP *o
835Return a short description of the provided OP.
836
837=for apidoc Am|U32|OP_CLASS|OP *o
838Return the class of the provided OP: that is, which of the *OP
839structures it uses. For core ops this currently gets the information out
840of PL_opargs, which does not always accurately reflect the type used.
841For custom ops the type is returned from the registration, and it is up
842to the registree to ensure it is accurate. The value returned will be
843one of the OA_* constants from op.h.
844
845=cut
846*/
847
1830b3d9
BM
848#define OP_NAME(o) ((o)->op_type == OP_CUSTOM \
849 ? XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_name) \
850 : PL_op_name[(o)->op_type])
851#define OP_DESC(o) ((o)->op_type == OP_CUSTOM \
852 ? XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_desc) \
853 : PL_op_desc[(o)->op_type])
854#define OP_CLASS(o) ((o)->op_type == OP_CUSTOM \
855 ? XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_class) \
856 : (PL_opargs[(o)->op_type] & OA_CLASS_MASK))
857
7bff8c33
NC
858#define newSUB(f, o, p, b) Perl_newATTRSUB(aTHX_ (f), (o), (p), NULL, (b))
859
598921a7
NC
860#ifdef PERL_MAD
861# define MAD_NULL 1
862# define MAD_PV 2
863# define MAD_OP 3
864# define MAD_SV 4
865
866struct madprop {
867 MADPROP* mad_next;
d503a9ba 868 void *mad_val;
598921a7
NC
869 U32 mad_vlen;
870/* short mad_count; */
871 char mad_key;
872 char mad_type;
873};
874
875struct token {
876 I32 tk_type;
877 YYSTYPE tk_lval;
878 MADPROP* tk_mad;
879};
880#endif
2d910ff8
RGS
881
882/*
2b3def87 883 * Values that can be held by mad_key :
2d910ff8
RGS
884 * ^ unfilled head spot
885 * , literal ,
886 * ; literal ; (blank if implicit ; at end of block)
887 * : literal : from ?: or attr list
888 * + unary +
889 * ? literal ? from ?:
890 * ( literal (
891 * ) literal )
892 * [ literal [
893 * ] literal ]
894 * { literal {
895 * } literal }
896 * @ literal @ sigil
897 * $ literal $ sigil
898 * * literal * sigil
899 * ! use is source filtered
900 * & & or sub
901 * # whitespace/comment following ; or }
902 * # $# sigil
903 * 1 1st ; from for(;;)
904 * 1 retired protasis
905 * 2 2nd ; from for(;;)
906 * 2 retired apodosis
907 * 3 C-style for list
908 * a sub or var attributes
909 * a non-method arrow operator
910 * A method arrow operator
911 * A use import args
912 * b format block
913 * B retired stub block
914 * C constant conditional op
915 * d declarator
916 * D do block
917 * e unreached "else" (see C)
918 * e expression producing E
919 * E tr/E/R/, /E/
920 * f folded constant op
921 * F peg op for format
63575281 922 * g op was forced to be a word
2d910ff8
RGS
923 * i if/unless modifier
924 * I if/elsif/unless statement
dde83331 925 * k local declarator
2d910ff8
RGS
926 * K retired kid op
927 * l last index of array ($#foo)
928 * L label
929 * m modifier on regex
2d910ff8
RGS
930 * n sub or format name
931 * o current operator/declarator name
932 * o else/continue
933 * O generic optimized op
934 * p peg to hold extra whitespace at statement level
935 * P peg op for package declaration
936 * q opening quote
937 * = quoted material
938 * Q closing quote
939 * Q optimized qw//
940 * r expression producing R
941 * R tr/E/R/ s/E/R/
2d910ff8
RGS
942 * s sub signature
943 * S use import stub (no import)
944 * S retired sort block
945 * t unreached "then" (see C)
946 * U use import op
947 * v private sv of for loop
948 * V use version
949 * w while/until modifier
950 * W while/for statement
951 * x optimized qw
952 * X random thing
953 * _ whitespace/comments preceding anything else
954 * ~ =~ operator
955 */
3f2908ec
NC
956
957/*
958 * Local variables:
959 * c-indentation-style: bsd
960 * c-basic-offset: 4
961 * indent-tabs-mode: t
962 * End:
963 *
964 * ex: set ts=8 sts=4 sw=4 noet:
965 */