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a0d0e21e 1/* op.h
79072805 2 *
bc89e66f 3 * Copyright (c) 1991-2001, Larry Wall
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4 *
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.
7 *
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8 */
9
10/*
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).
24 */
25
4633a7c4 26typedef U32 PADOFFSET;
11343788 27#define NOT_IN_PAD ((PADOFFSET) -1)
79072805 28
4633a7c4 29#ifdef DEBUGGING_OPS
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30#define OPCODE opcode
31#else
32#define OPCODE U16
33#endif
34
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35#ifdef BASEOP_DEFINITION
36#define BASEOP BASEOP_DEFINITION
37#else
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38#define BASEOP \
39 OP* op_next; \
40 OP* op_sibling; \
4f63d024 41 OP* (CPERLscope(*op_ppaddr))(pTHX); \
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42 PADOFFSET op_targ; \
43 OPCODE op_type; \
44 U16 op_seq; \
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45 U8 op_flags; \
46 U8 op_private;
0f4eea8f 47#endif
79072805 48
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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 : \
53 dfl)
54
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55/*
56=for apidoc Amn|U32|GIMME_V
57The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>,
91e74348 58C<G_SCALAR> or C<G_ARRAY> for void, scalar or list context,
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59respectively.
60
61=for apidoc Amn|U32|GIMME
62A backward-compatible version of C<GIMME_V> which can only return
63C<G_SCALAR> or C<G_ARRAY>; in a void context, it returns C<G_SCALAR>.
64Deprecated. Use C<GIMME_V> instead.
65
66=cut
67*/
68
533c011a 69#define GIMME_V OP_GIMME(PL_op, block_gimme())
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70
71/* Public flags */
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72
73#define OPf_WANT 3 /* Mask for "want" bits: */
74#define OPf_WANT_VOID 1 /* Want nothing */
75#define OPf_WANT_SCALAR 2 /* Want single value */
76#define OPf_WANT_LIST 3 /* Want list of any length */
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77#define OPf_KIDS 4 /* There is a firstborn child. */
78#define OPf_PARENS 8 /* This operator was parenthesized. */
463ee0b2 79 /* (Or block needs explicit scope entry.) */
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80#define OPf_REF 16 /* Certified reference. */
81 /* (Return container, not containee). */
82#define OPf_MOD 32 /* Will modify (lvalue). */
83#define OPf_STACKED 64 /* Some arg is arriving on the stack. */
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84#define OPf_SPECIAL 128 /* Do something weird for this op: */
85 /* On local LVAL, don't init local value. */
86 /* On OP_SORT, subroutine is inlined. */
87 /* On OP_NOT, inversion was implicit. */
a0d0e21e 88 /* On OP_LEAVE, don't restore curpm. */
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89 /* On truncate, we truncate filehandle */
90 /* On control verbs, we saw no label */
91 /* On flipflop, we saw ... instead of .. */
92 /* On UNOPs, saw bare parens, e.g. eof(). */
a0d0e21e 93 /* On OP_ENTERSUB || OP_NULL, saw a "do". */
afebc493 94 /* On OP_EXISTS, treat av as av, not avhv. */
f2ec2afd 95 /* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */
54b9620d 96 /* On OP_ENTERITER, loop var is per-thread */
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97 /* On pushre, re is /\s+/ imp. by split " " */
98 /* On regcomp, "use re 'eval'" was in scope */
79072805 99
54310121 100/* old names; don't use in new code, but don't break them, either */
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101#define OPf_LIST OPf_WANT_LIST
102#define OPf_KNOW OPf_WANT
954c1994 103
54310121 104#define GIMME \
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105 (PL_op->op_flags & OPf_WANT \
106 ? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \
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107 ? G_ARRAY \
108 : G_SCALAR) \
109 : dowantarray())
54310121 110
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111/* NOTE: OP_NEXTSTATE, OP_DBSTATE, and OP_SETSTATE (i.e. COPs) carry lower
112 * bits of PL_hints in op_private */
113
a0d0e21e 114/* Private for lvalues */
cd06dffe 115#define OPpLVAL_INTRO 128 /* Lvalue must be localized or lvalue sub */
a0d0e21e 116
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117/* Private for OP_LEAVE, OP_LEAVESUB, OP_LEAVESUBLV and OP_LEAVEWRITE */
118#define OPpREFCOUNTED 64 /* op_targ carries a refcount */
119
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120/* Private for OP_AASSIGN */
121#define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */
10c8fecd 122#define OPpASSIGN_HASH 32 /* Assigning to possible pseudohash. */
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123
124/* Private for OP_SASSIGN */
125#define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */
79072805 126
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127/* Private for OP_MATCH and OP_SUBST{,CONST} */
128#define OPpRUNTIME 64 /* Pattern coming in on the stack */
129
79072805 130/* Private for OP_TRANS */
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131#define OPpTRANS_FROM_UTF 1
132#define OPpTRANS_TO_UTF 2
383e7cdd 133#define OPpTRANS_IDENTICAL 4 /* right side is same as left */
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134#define OPpTRANS_SQUASH 8
135#define OPpTRANS_DELETE 16
136#define OPpTRANS_COMPLEMENT 32
137#define OPpTRANS_GROWS 64
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138
139/* Private for OP_REPEAT */
a0d0e21e 140#define OPpREPEAT_DOLIST 64 /* List replication. */
79072805 141
d3011074 142/* Private for OP_RV2?V, OP_?ELEM */
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143#define OPpDEREF (32|64) /* Want ref to something: */
144#define OPpDEREF_AV 32 /* Want ref to AV. */
145#define OPpDEREF_HV 64 /* Want ref to HV. */
146#define OPpDEREF_SV (32|64) /* Want ref to SV. */
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147 /* OP_ENTERSUB only */
148#define OPpENTERSUB_DB 16 /* Debug subroutine. */
d3011074 149#define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */
7a52d87a 150 /* OP_RV2CV only */
68dc0745 151#define OPpENTERSUB_AMPER 8 /* Used & form to call. */
9675f7ac 152#define OPpENTERSUB_NOPAREN 128 /* bare sub call (without parens) */
cd06dffe 153#define OPpENTERSUB_INARGS 4 /* Lval used as arg to a sub. */
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154 /* OP_GV only */
155#define OPpEARLY_CV 32 /* foo() called before sub foo was parsed */
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156 /* OP_?ELEM only */
157#define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */
64aac5a9 158 /* OP_RV2?V, OP_GVSV only */
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159#define OPpOUR_INTRO 16 /* Variable was in an our() */
160 /* OP_RV2[AH]V, OP_PAD[AH]V, OP_[AH]ELEM */
161#define OPpMAYBE_LVSUB 8 /* We might be an lvalue to return */
192587c2 162 /* for OP_RV2?V, lower bits carry hints (currently only HINT_STRICT_REFS) */
79072805 163
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164/* Private for OPs with TARGLEX */
165 /* (lower bits may carry MAXARG) */
166#define OPpTARGET_MY 16 /* Target is PADMY. */
167
79072805 168/* Private for OP_CONST */
7a52d87a 169#define OPpCONST_STRICT 8 /* bearword subject to strict 'subs' */
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170#define OPpCONST_ENTERED 16 /* Has been entered as symbol. */
171#define OPpCONST_ARYBASE 32 /* Was a $[ translated to constant. */
a0d0e21e 172#define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */
599cee73 173#define OPpCONST_WARNING 128 /* Was a $^W translated to constant. */
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174
175/* Private for OP_FLIP/FLOP */
a0d0e21e 176#define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */
79072805 177
ed6116ce 178/* Private for OP_LIST */
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179#define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */
180
5f05dabc 181/* Private for OP_DELETE */
54310121 182#define OPpSLICE 64 /* Operating on a list of keys */
5f05dabc 183
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184/* Private for OP_EXISTS */
185#define OPpEXISTS_SUB 64 /* Checking for &sub, not {} or []. */
186
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187/* Private for OP_SORT */
188#define OPpSORT_NUMERIC 1 /* Optimized away { $a <=> $b } */
189#define OPpSORT_INTEGER 2 /* Ditto while under "use integer" */
190#define OPpSORT_REVERSE 4 /* Descending sort */
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191/* Private for OP_THREADSV */
192#define OPpDONE_SVREF 64 /* Been through newSVREF once */
554b3eca 193
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194/* Private for OP_OPEN and OP_BACKTICK */
195#define OPpOPEN_IN_RAW 16 /* binmode(F,":raw") on input fh */
196#define OPpOPEN_IN_CRLF 32 /* binmode(F,":crlf") on input fh */
197#define OPpOPEN_OUT_RAW 64 /* binmode(F,":raw") on output fh */
198#define OPpOPEN_OUT_CRLF 128 /* binmode(F,":crlf") on output fh */
199
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200/* Private for OP_EXIT */
201#define OPpEXIT_VMSISH 128 /* exit(0) vs. exit(1) vmsish mode*/
202
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203struct op {
204 BASEOP
205};
206
207struct unop {
208 BASEOP
209 OP * op_first;
210};
211
212struct binop {
213 BASEOP
214 OP * op_first;
215 OP * op_last;
216};
217
218struct logop {
219 BASEOP
220 OP * op_first;
221 OP * op_other;
222};
223
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224struct listop {
225 BASEOP
226 OP * op_first;
227 OP * op_last;
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228};
229
230struct pmop {
231 BASEOP
232 OP * op_first;
233 OP * op_last;
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234 OP * op_pmreplroot;
235 OP * op_pmreplstart;
236 PMOP * op_pmnext; /* list of all scanpats */
237 REGEXP * op_pmregexp; /* compiled expression */
a0d0e21e 238 U16 op_pmflags;
4633a7c4 239 U16 op_pmpermflags;
48c036b1 240 U8 op_pmdynflags;
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241#ifdef USE_ITHREADS
242 char * op_pmstashpv;
243#else
244 HV * op_pmstash;
245#endif
79072805 246};
a0d0e21e 247
48c036b1 248#define PMdf_USED 0x01 /* pm has been used once already */
b3eb6a9b 249#define PMdf_TAINTED 0x02 /* pm compiled from tainted pattern */
7e2040f0 250#define PMdf_UTF8 0x04 /* pm compiled from utf8 data */
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251#define PMdf_DYN_UTF8 0x08
252
253#define PMdf_CMP_UTF8 (PMdf_UTF8|PMdf_DYN_UTF8)
48c036b1 254
b3eb6a9b 255#define PMf_RETAINT 0x0001 /* taint $1 etc. if target tainted */
a0d0e21e 256#define PMf_ONCE 0x0002 /* use pattern only once per reset */
c277df42 257#define PMf_REVERSED 0x0004 /* Should be matched right->left */
ce862d02 258#define PMf_MAYBE_CONST 0x0008 /* replacement contains variables */
a0d0e21e 259#define PMf_SKIPWHITE 0x0010 /* skip leading whitespace for split */
8782bef2 260#define PMf_WHITE 0x0020 /* pattern is \s+ */
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261#define PMf_CONST 0x0040 /* subst replacement is constant */
262#define PMf_KEEP 0x0080 /* keep 1st runtime pattern forever */
263#define PMf_GLOBAL 0x0100 /* pattern had a g modifier */
c90c0ff4 264#define PMf_CONTINUE 0x0200 /* don't reset pos() if //g fails */
a0d0e21e 265#define PMf_EVAL 0x0400 /* evaluating replacement as expr */
8782bef2 266#define PMf_LOCALE 0x0800 /* use locale for character types */
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267#define PMf_MULTILINE 0x1000 /* assume multiple lines */
268#define PMf_SINGLELINE 0x2000 /* assume single line */
8782bef2 269#define PMf_FOLD 0x4000 /* case insensitivity */
a0d0e21e 270#define PMf_EXTENDED 0x8000 /* chuck embedded whitespace */
79072805 271
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272/* mask of bits stored in regexp->reganch */
273#define PMf_COMPILETIME (PMf_MULTILINE|PMf_SINGLELINE|PMf_LOCALE|PMf_FOLD|PMf_EXTENDED)
274
cb55de95
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275#ifdef USE_ITHREADS
276# define PmopSTASHPV(o) ((o)->op_pmstashpv)
277# define PmopSTASHPV_set(o,pv) ((o)->op_pmstashpv = ((pv) ? savepv(pv) : Nullch))
278# define PmopSTASH(o) (PmopSTASHPV(o) \
279 ? gv_stashpv(PmopSTASHPV(o),GV_ADD) : Nullhv)
280# define PmopSTASH_set(o,hv) PmopSTASHPV_set(o, (hv) ? HvNAME(hv) : Nullch)
281#else
282# define PmopSTASH(o) ((o)->op_pmstash)
283# define PmopSTASH_set(o,hv) ((o)->op_pmstash = (hv))
284# define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME(PmopSTASH(o)) : Nullch)
285 /* op_pmstash is not refcounted */
286# define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD))
287#endif
288
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289struct svop {
290 BASEOP
291 SV * op_sv;
292};
293
7934575e 294struct padop {
79072805 295 BASEOP
7934575e 296 PADOFFSET op_padix;
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297};
298
299struct pvop {
300 BASEOP
301 char * op_pv;
302};
303
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304struct loop {
305 BASEOP
306 OP * op_first;
307 OP * op_last;
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308 OP * op_redoop;
309 OP * op_nextop;
310 OP * op_lastop;
311};
312
350de78d
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313#define cUNOPx(o) ((UNOP*)o)
314#define cBINOPx(o) ((BINOP*)o)
315#define cLISTOPx(o) ((LISTOP*)o)
316#define cLOGOPx(o) ((LOGOP*)o)
317#define cPMOPx(o) ((PMOP*)o)
318#define cSVOPx(o) ((SVOP*)o)
319#define cPADOPx(o) ((PADOP*)o)
320#define cPVOPx(o) ((PVOP*)o)
321#define cCOPx(o) ((COP*)o)
322#define cLOOPx(o) ((LOOP*)o)
323
324#define cUNOP cUNOPx(PL_op)
325#define cBINOP cBINOPx(PL_op)
326#define cLISTOP cLISTOPx(PL_op)
327#define cLOGOP cLOGOPx(PL_op)
328#define cPMOP cPMOPx(PL_op)
329#define cSVOP cSVOPx(PL_op)
330#define cPADOP cPADOPx(PL_op)
331#define cPVOP cPVOPx(PL_op)
332#define cCOP cCOPx(PL_op)
333#define cLOOP cLOOPx(PL_op)
334
335#define cUNOPo cUNOPx(o)
336#define cBINOPo cBINOPx(o)
337#define cLISTOPo cLISTOPx(o)
338#define cLOGOPo cLOGOPx(o)
339#define cPMOPo cPMOPx(o)
340#define cSVOPo cSVOPx(o)
341#define cPADOPo cPADOPx(o)
342#define cPVOPo cPVOPx(o)
343#define cCOPo cCOPx(o)
344#define cLOOPo cLOOPx(o)
345
346#define kUNOP cUNOPx(kid)
347#define kBINOP cBINOPx(kid)
348#define kLISTOP cLISTOPx(kid)
349#define kLOGOP cLOGOPx(kid)
350#define kPMOP cPMOPx(kid)
351#define kSVOP cSVOPx(kid)
352#define kPADOP cPADOPx(kid)
353#define kPVOP cPVOPx(kid)
354#define kCOP cCOPx(kid)
355#define kLOOP cLOOPx(kid)
356
357
358#ifdef USE_ITHREADS
638eceb6 359# define cGVOPx_gv(o) ((GV*)PL_curpad[cPADOPx(o)->op_padix])
743e66e6 360# define IS_PADGV(v) (v && SvTYPE(v) == SVt_PVGV && GvIN_PAD(v))
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GS
361# define IS_PADCONST(v) (v && SvREADONLY(v))
362# define cSVOPx_sv(v) (cSVOPx(v)->op_sv \
363 ? cSVOPx(v)->op_sv : PL_curpad[(v)->op_targ])
638eceb6
GS
364# define cSVOPx_svp(v) (cSVOPx(v)->op_sv \
365 ? &cSVOPx(v)->op_sv : &PL_curpad[(v)->op_targ])
350de78d 366#else
638eceb6 367# define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv)
743e66e6 368# define IS_PADGV(v) FALSE
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369# define IS_PADCONST(v) FALSE
370# define cSVOPx_sv(v) (cSVOPx(v)->op_sv)
638eceb6 371# define cSVOPx_svp(v) (&cSVOPx(v)->op_sv)
350de78d 372#endif
79072805 373
638eceb6
GS
374#define cGVOP_gv cGVOPx_gv(PL_op)
375#define cGVOPo_gv cGVOPx_gv(o)
376#define kGVOP_gv cGVOPx_gv(kid)
377#define cSVOP_sv cSVOPx_sv(PL_op)
378#define cSVOPo_sv cSVOPx_sv(o)
379#define kSVOP_sv cSVOPx_sv(kid)
7766f137 380
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381#define Nullop Null(OP*)
382
4369b173 383/* Lowest byte of PL_opargs */
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384#define OA_MARK 1
385#define OA_FOLDCONST 2
386#define OA_RETSCALAR 4
387#define OA_TARGET 8
388#define OA_RETINTEGER 16
389#define OA_OTHERINT 32
390#define OA_DANGEROUS 64
391#define OA_DEFGV 128
b162f9ea 392#define OA_TARGLEX 256
a0d0e21e 393
db173bac 394/* The next 4 bits encode op class information */
b162f9ea
IZ
395#define OCSHIFT 9
396
397#define OA_CLASS_MASK (15 << OCSHIFT)
398
399#define OA_BASEOP (0 << OCSHIFT)
400#define OA_UNOP (1 << OCSHIFT)
401#define OA_BINOP (2 << OCSHIFT)
402#define OA_LOGOP (3 << OCSHIFT)
1a67a97c
SM
403#define OA_LISTOP (4 << OCSHIFT)
404#define OA_PMOP (5 << OCSHIFT)
405#define OA_SVOP (6 << OCSHIFT)
7934575e 406#define OA_PADOP (7 << OCSHIFT)
1a67a97c
SM
407#define OA_PVOP_OR_SVOP (8 << OCSHIFT)
408#define OA_LOOP (9 << OCSHIFT)
409#define OA_COP (10 << OCSHIFT)
410#define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
411#define OA_FILESTATOP (12 << OCSHIFT)
412#define OA_LOOPEXOP (13 << OCSHIFT)
b162f9ea
IZ
413
414#define OASHIFT 13
a0d0e21e 415
4369b173 416/* Remaining nybbles of PL_opargs */
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417#define OA_SCALAR 1
418#define OA_LIST 2
419#define OA_AVREF 3
420#define OA_HVREF 4
421#define OA_CVREF 5
422#define OA_FILEREF 6
423#define OA_SCALARREF 7
424#define OA_OPTIONAL 8
425
534825c4
GS
426#ifdef USE_ITHREADS
427# define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex)
428# define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex)
429# define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex)
430# define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex)
534825c4
GS
431#else
432# define OP_REFCNT_INIT NOOP
433# define OP_REFCNT_LOCK NOOP
434# define OP_REFCNT_UNLOCK NOOP
435# define OP_REFCNT_TERM NOOP
534825c4 436#endif
e4783991 437
282f25c9
JH
438#define OpREFCNT_set(o,n) ((o)->op_targ = (n))
439#define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : Nullop)
440#define OpREFCNT_dec(o) (--(o)->op_targ)
441
e4783991
GS
442/* flags used by Perl_load_module() */
443#define PERL_LOADMOD_DENY 0x1
444#define PERL_LOADMOD_NOIMPORT 0x2
445#define PERL_LOADMOD_IMPORT_OPS 0x4