This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
AIX patch (including Configure support for {sched,pthread}_yield,
[perl5.git] / op.h
CommitLineData
a0d0e21e 1/* op.h
79072805 2 *
9607fc9c 3 * Copyright (c) 1991-1997, Larry Wall
79072805
LW
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 *
79072805
LW
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
79072805
LW
30#define OPCODE opcode
31#else
32#define OPCODE U16
33#endif
34
35#define BASEOP \
36 OP* op_next; \
37 OP* op_sibling; \
4e35701f 38 OP* (*op_ppaddr)_((ARGSproto)); \
79072805
LW
39 PADOFFSET op_targ; \
40 OPCODE op_type; \
41 U16 op_seq; \
a0d0e21e
LW
42 U8 op_flags; \
43 U8 op_private;
79072805 44
54310121
PP
45#define OP_GIMME(op,dfl) \
46 (((op)->op_flags & OPf_WANT) == OPf_WANT_VOID ? G_VOID : \
47 ((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \
48 ((op)->op_flags & OPf_WANT) == OPf_WANT_LIST ? G_ARRAY : \
49 dfl)
50
51#define GIMME_V OP_GIMME(op, block_gimme())
79072805
LW
52
53/* Public flags */
54310121
PP
54
55#define OPf_WANT 3 /* Mask for "want" bits: */
56#define OPf_WANT_VOID 1 /* Want nothing */
57#define OPf_WANT_SCALAR 2 /* Want single value */
58#define OPf_WANT_LIST 3 /* Want list of any length */
79072805
LW
59#define OPf_KIDS 4 /* There is a firstborn child. */
60#define OPf_PARENS 8 /* This operator was parenthesized. */
463ee0b2 61 /* (Or block needs explicit scope entry.) */
a0d0e21e
LW
62#define OPf_REF 16 /* Certified reference. */
63 /* (Return container, not containee). */
64#define OPf_MOD 32 /* Will modify (lvalue). */
65#define OPf_STACKED 64 /* Some arg is arriving on the stack. */
79072805
LW
66#define OPf_SPECIAL 128 /* Do something weird for this op: */
67 /* On local LVAL, don't init local value. */
68 /* On OP_SORT, subroutine is inlined. */
69 /* On OP_NOT, inversion was implicit. */
a0d0e21e 70 /* On OP_LEAVE, don't restore curpm. */
79072805
LW
71 /* On truncate, we truncate filehandle */
72 /* On control verbs, we saw no label */
73 /* On flipflop, we saw ... instead of .. */
74 /* On UNOPs, saw bare parens, e.g. eof(). */
a0d0e21e 75 /* On OP_ENTERSUB || OP_NULL, saw a "do". */
f2ec2afd 76 /* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */
54b9620d 77 /* On OP_ENTERITER, loop var is per-thread */
79072805 78
54310121
PP
79/* old names; don't use in new code, but don't break them, either */
80#define OPf_LIST 1
81#define OPf_KNOW 2
82#define GIMME \
83 (op->op_flags & OPf_KNOW ? op->op_flags & OPf_LIST : dowantarray())
84
a0d0e21e
LW
85/* Private for lvalues */
86#define OPpLVAL_INTRO 128 /* Lvalue must be localized */
87
88/* Private for OP_AASSIGN */
89#define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */
90
91/* Private for OP_SASSIGN */
92#define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */
79072805 93
c90c0ff4
PP
94/* Private for OP_MATCH and OP_SUBST{,CONST} */
95#define OPpRUNTIME 64 /* Pattern coming in on the stack */
96
79072805 97/* Private for OP_TRANS */
a0d0e21e
LW
98#define OPpTRANS_SQUASH 16
99#define OPpTRANS_DELETE 32
100#define OPpTRANS_COMPLEMENT 64
79072805
LW
101
102/* Private for OP_REPEAT */
a0d0e21e 103#define OPpREPEAT_DOLIST 64 /* List replication. */
79072805 104
a0d0e21e 105/* Private for OP_ENTERSUB, OP_RV2?V, OP_?ELEM */
5f05dabc
PP
106#define OPpDEREF (32|64) /* Want ref to something: */
107#define OPpDEREF_AV 32 /* Want ref to AV. */
108#define OPpDEREF_HV 64 /* Want ref to HV. */
109#define OPpDEREF_SV (32|64) /* Want ref to SV. */
68dc0745
PP
110 /* OP_ENTERSUB only */
111#define OPpENTERSUB_DB 16 /* Debug subroutine. */
112#define OPpENTERSUB_AMPER 8 /* Used & form to call. */
113 /* OP_?ELEM only */
114#define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */
115 /* for OP_RV2?V, lower bits carry hints */
79072805
LW
116
117/* Private for OP_CONST */
748a9306
LW
118#define OPpCONST_ENTERED 16 /* Has been entered as symbol. */
119#define OPpCONST_ARYBASE 32 /* Was a $[ translated to constant. */
a0d0e21e 120#define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */
79072805
LW
121
122/* Private for OP_FLIP/FLOP */
a0d0e21e 123#define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */
79072805 124
ed6116ce 125/* Private for OP_LIST */
a0d0e21e
LW
126#define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */
127
5f05dabc 128/* Private for OP_DELETE */
54310121 129#define OPpSLICE 64 /* Operating on a list of keys */
5f05dabc 130
bbce6d69
PP
131/* Private for OP_SORT, OP_PRTF, OP_SPRINTF, string cmp'n, and case changers */
132#define OPpLOCALE 64 /* Use locale */
133
554b3eca
MB
134/* Private for OP_SPECIFIC */
135#define OPpPM_NOT_CONST 64 /* Not constant enough for pmruntime */
136
79072805
LW
137struct op {
138 BASEOP
139};
140
141struct unop {
142 BASEOP
143 OP * op_first;
144};
145
146struct binop {
147 BASEOP
148 OP * op_first;
149 OP * op_last;
150};
151
152struct logop {
153 BASEOP
154 OP * op_first;
155 OP * op_other;
156};
157
158struct condop {
159 BASEOP
160 OP * op_first;
161 OP * op_true;
162 OP * op_false;
163};
164
165struct listop {
166 BASEOP
167 OP * op_first;
168 OP * op_last;
169 U32 op_children;
170};
171
172struct pmop {
173 BASEOP
174 OP * op_first;
175 OP * op_last;
176 U32 op_children;
177 OP * op_pmreplroot;
178 OP * op_pmreplstart;
179 PMOP * op_pmnext; /* list of all scanpats */
180 REGEXP * op_pmregexp; /* compiled expression */
a0d0e21e 181 U16 op_pmflags;
4633a7c4 182 U16 op_pmpermflags;
79072805 183};
a0d0e21e
LW
184
185#define PMf_USED 0x0001 /* pm has been used once already */
186#define PMf_ONCE 0x0002 /* use pattern only once per reset */
c277df42
IZ
187#define PMf_REVERSED 0x0004 /* Should be matched right->left */
188/*#define PMf_ALL 0x0008*/ /* initial constant is whole pat */
a0d0e21e
LW
189#define PMf_SKIPWHITE 0x0010 /* skip leading whitespace for split */
190#define PMf_FOLD 0x0020 /* case insensitivity */
191#define PMf_CONST 0x0040 /* subst replacement is constant */
192#define PMf_KEEP 0x0080 /* keep 1st runtime pattern forever */
193#define PMf_GLOBAL 0x0100 /* pattern had a g modifier */
c90c0ff4 194#define PMf_CONTINUE 0x0200 /* don't reset pos() if //g fails */
a0d0e21e
LW
195#define PMf_EVAL 0x0400 /* evaluating replacement as expr */
196#define PMf_WHITE 0x0800 /* pattern is \s+ */
197#define PMf_MULTILINE 0x1000 /* assume multiple lines */
198#define PMf_SINGLELINE 0x2000 /* assume single line */
bbce6d69 199#define PMf_LOCALE 0x4000 /* use locale for character types */
a0d0e21e 200#define PMf_EXTENDED 0x8000 /* chuck embedded whitespace */
79072805
LW
201
202struct svop {
203 BASEOP
204 SV * op_sv;
205};
206
207struct gvop {
208 BASEOP
209 GV * op_gv;
210};
211
212struct pvop {
213 BASEOP
214 char * op_pv;
215};
216
79072805
LW
217struct loop {
218 BASEOP
219 OP * op_first;
220 OP * op_last;
221 U32 op_children;
222 OP * op_redoop;
223 OP * op_nextop;
224 OP * op_lastop;
225};
226
227#define cUNOP ((UNOP*)op)
228#define cBINOP ((BINOP*)op)
229#define cLISTOP ((LISTOP*)op)
230#define cLOGOP ((LOGOP*)op)
231#define cCONDOP ((CONDOP*)op)
232#define cPMOP ((PMOP*)op)
233#define cSVOP ((SVOP*)op)
234#define cGVOP ((GVOP*)op)
235#define cPVOP ((PVOP*)op)
79072805
LW
236#define cCOP ((COP*)op)
237#define cLOOP ((LOOP*)op)
238
11343788
MB
239#define cUNOPo ((UNOP*)o)
240#define cBINOPo ((BINOP*)o)
241#define cLISTOPo ((LISTOP*)o)
242#define cLOGOPo ((LOGOP*)o)
243#define cCONDOPo ((CONDOP*)o)
244#define cPMOPo ((PMOP*)o)
245#define cSVOPo ((SVOP*)o)
246#define cGVOPo ((GVOP*)o)
247#define cPVOPo ((PVOP*)o)
248#define cCVOPo ((CVOP*)o)
249#define cCOPo ((COP*)o)
250#define cLOOPo ((LOOP*)o)
251
79072805
LW
252#define kUNOP ((UNOP*)kid)
253#define kBINOP ((BINOP*)kid)
254#define kLISTOP ((LISTOP*)kid)
255#define kLOGOP ((LOGOP*)kid)
256#define kCONDOP ((CONDOP*)kid)
257#define kPMOP ((PMOP*)kid)
258#define kSVOP ((SVOP*)kid)
259#define kGVOP ((GVOP*)kid)
260#define kPVOP ((PVOP*)kid)
79072805
LW
261#define kCOP ((COP*)kid)
262#define kLOOP ((LOOP*)kid)
263
264#define Nullop Null(OP*)
265
a0d0e21e
LW
266/* Lowest byte of opargs */
267#define OA_MARK 1
268#define OA_FOLDCONST 2
269#define OA_RETSCALAR 4
270#define OA_TARGET 8
271#define OA_RETINTEGER 16
272#define OA_OTHERINT 32
273#define OA_DANGEROUS 64
274#define OA_DEFGV 128
275
db173bac
MB
276/* The next 4 bits encode op class information */
277#define OA_BASEOP (0 << 8)
278#define OA_UNOP (1 << 8)
279#define OA_BINOP (2 << 8)
280#define OA_LOGOP (3 << 8)
281#define OA_CONDOP (4 << 8)
282#define OA_LISTOP (5 << 8)
283#define OA_PMOP (6 << 8)
284#define OA_SVOP (7 << 8)
285#define OA_GVOP (8 << 8)
286#define OA_PVOP (9 << 8)
287#define OA_LOOP (10 << 8)
288#define OA_COP (11 << 8)
289#define OA_BASEOP_OR_UNOP (12 << 8)
290#define OA_FILESTATOP (13 << 8)
291#define OA_LOOPEXOP (14 << 8)
292
293#define OASHIFT 12
a0d0e21e
LW
294
295/* Remaining nybbles of opargs */
296#define OA_SCALAR 1
297#define OA_LIST 2
298#define OA_AVREF 3
299#define OA_HVREF 4
300#define OA_CVREF 5
301#define OA_FILEREF 6
302#define OA_SCALARREF 7
303#define OA_OPTIONAL 8
304