Commit | Line | Data |
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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 | 26 | typedef U32 PADOFFSET; |
79072805 | 27 | |
4633a7c4 | 28 | #ifdef DEBUGGING_OPS |
79072805 LW |
29 | #define OPCODE opcode |
30 | #else | |
31 | #define OPCODE U16 | |
32 | #endif | |
33 | ||
34 | #define BASEOP \ | |
35 | OP* op_next; \ | |
36 | OP* op_sibling; \ | |
37 | OP* (*op_ppaddr)(); \ | |
38 | PADOFFSET op_targ; \ | |
39 | OPCODE op_type; \ | |
40 | U16 op_seq; \ | |
a0d0e21e LW |
41 | U8 op_flags; \ |
42 | U8 op_private; | |
79072805 | 43 | |
54310121 | 44 | #define OP_GIMME(op,dfl) \ |
45 | (((op)->op_flags & OPf_WANT) == OPf_WANT_VOID ? G_VOID : \ | |
46 | ((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \ | |
47 | ((op)->op_flags & OPf_WANT) == OPf_WANT_LIST ? G_ARRAY : \ | |
48 | dfl) | |
49 | ||
50 | #define GIMME_V OP_GIMME(op, block_gimme()) | |
79072805 LW |
51 | |
52 | /* Public flags */ | |
54310121 | 53 | |
54 | #define OPf_WANT 3 /* Mask for "want" bits: */ | |
55 | #define OPf_WANT_VOID 1 /* Want nothing */ | |
56 | #define OPf_WANT_SCALAR 2 /* Want single value */ | |
57 | #define OPf_WANT_LIST 3 /* Want list of any length */ | |
79072805 LW |
58 | #define OPf_KIDS 4 /* There is a firstborn child. */ |
59 | #define OPf_PARENS 8 /* This operator was parenthesized. */ | |
463ee0b2 | 60 | /* (Or block needs explicit scope entry.) */ |
a0d0e21e LW |
61 | #define OPf_REF 16 /* Certified reference. */ |
62 | /* (Return container, not containee). */ | |
63 | #define OPf_MOD 32 /* Will modify (lvalue). */ | |
64 | #define OPf_STACKED 64 /* Some arg is arriving on the stack. */ | |
79072805 LW |
65 | #define OPf_SPECIAL 128 /* Do something weird for this op: */ |
66 | /* On local LVAL, don't init local value. */ | |
67 | /* On OP_SORT, subroutine is inlined. */ | |
68 | /* On OP_NOT, inversion was implicit. */ | |
a0d0e21e | 69 | /* On OP_LEAVE, don't restore curpm. */ |
79072805 LW |
70 | /* On truncate, we truncate filehandle */ |
71 | /* On control verbs, we saw no label */ | |
72 | /* On flipflop, we saw ... instead of .. */ | |
73 | /* On UNOPs, saw bare parens, e.g. eof(). */ | |
a0d0e21e | 74 | /* On OP_ENTERSUB || OP_NULL, saw a "do". */ |
f2ec2afd | 75 | /* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */ |
79072805 | 76 | |
54310121 | 77 | /* old names; don't use in new code, but don't break them, either */ |
78 | #define OPf_LIST 1 | |
79 | #define OPf_KNOW 2 | |
80 | #define GIMME \ | |
81 | (op->op_flags & OPf_KNOW ? op->op_flags & OPf_LIST : dowantarray()) | |
82 | ||
a0d0e21e LW |
83 | /* Private for lvalues */ |
84 | #define OPpLVAL_INTRO 128 /* Lvalue must be localized */ | |
85 | ||
86 | /* Private for OP_AASSIGN */ | |
87 | #define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */ | |
88 | ||
89 | /* Private for OP_SASSIGN */ | |
90 | #define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */ | |
79072805 | 91 | |
c90c0ff4 | 92 | /* Private for OP_MATCH and OP_SUBST{,CONST} */ |
93 | #define OPpRUNTIME 64 /* Pattern coming in on the stack */ | |
94 | ||
79072805 | 95 | /* Private for OP_TRANS */ |
a0d0e21e LW |
96 | #define OPpTRANS_SQUASH 16 |
97 | #define OPpTRANS_DELETE 32 | |
98 | #define OPpTRANS_COMPLEMENT 64 | |
79072805 LW |
99 | |
100 | /* Private for OP_REPEAT */ | |
a0d0e21e | 101 | #define OPpREPEAT_DOLIST 64 /* List replication. */ |
79072805 | 102 | |
a0d0e21e | 103 | /* Private for OP_ENTERSUB, OP_RV2?V, OP_?ELEM */ |
5f05dabc | 104 | #define OPpDEREF (32|64) /* Want ref to something: */ |
105 | #define OPpDEREF_AV 32 /* Want ref to AV. */ | |
106 | #define OPpDEREF_HV 64 /* Want ref to HV. */ | |
107 | #define OPpDEREF_SV (32|64) /* Want ref to SV. */ | |
68dc0745 | 108 | /* OP_ENTERSUB only */ |
109 | #define OPpENTERSUB_DB 16 /* Debug subroutine. */ | |
110 | #define OPpENTERSUB_AMPER 8 /* Used & form to call. */ | |
111 | /* OP_?ELEM only */ | |
112 | #define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */ | |
113 | /* for OP_RV2?V, lower bits carry hints */ | |
79072805 LW |
114 | |
115 | /* Private for OP_CONST */ | |
748a9306 LW |
116 | #define OPpCONST_ENTERED 16 /* Has been entered as symbol. */ |
117 | #define OPpCONST_ARYBASE 32 /* Was a $[ translated to constant. */ | |
a0d0e21e | 118 | #define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */ |
79072805 LW |
119 | |
120 | /* Private for OP_FLIP/FLOP */ | |
a0d0e21e | 121 | #define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */ |
79072805 | 122 | |
ed6116ce | 123 | /* Private for OP_LIST */ |
a0d0e21e LW |
124 | #define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */ |
125 | ||
5f05dabc | 126 | /* Private for OP_DELETE */ |
54310121 | 127 | #define OPpSLICE 64 /* Operating on a list of keys */ |
5f05dabc | 128 | |
bbce6d69 | 129 | /* Private for OP_SORT, OP_PRTF, OP_SPRINTF, string cmp'n, and case changers */ |
130 | #define OPpLOCALE 64 /* Use locale */ | |
131 | ||
79072805 LW |
132 | struct op { |
133 | BASEOP | |
134 | }; | |
135 | ||
136 | struct unop { | |
137 | BASEOP | |
138 | OP * op_first; | |
139 | }; | |
140 | ||
141 | struct binop { | |
142 | BASEOP | |
143 | OP * op_first; | |
144 | OP * op_last; | |
145 | }; | |
146 | ||
147 | struct logop { | |
148 | BASEOP | |
149 | OP * op_first; | |
150 | OP * op_other; | |
151 | }; | |
152 | ||
153 | struct condop { | |
154 | BASEOP | |
155 | OP * op_first; | |
156 | OP * op_true; | |
157 | OP * op_false; | |
158 | }; | |
159 | ||
160 | struct listop { | |
161 | BASEOP | |
162 | OP * op_first; | |
163 | OP * op_last; | |
164 | U32 op_children; | |
165 | }; | |
166 | ||
167 | struct pmop { | |
168 | BASEOP | |
169 | OP * op_first; | |
170 | OP * op_last; | |
171 | U32 op_children; | |
172 | OP * op_pmreplroot; | |
173 | OP * op_pmreplstart; | |
174 | PMOP * op_pmnext; /* list of all scanpats */ | |
175 | REGEXP * op_pmregexp; /* compiled expression */ | |
176 | SV * op_pmshort; /* for a fast bypass of execute() */ | |
a0d0e21e | 177 | U16 op_pmflags; |
4633a7c4 | 178 | U16 op_pmpermflags; |
79072805 LW |
179 | char op_pmslen; |
180 | }; | |
a0d0e21e LW |
181 | |
182 | #define PMf_USED 0x0001 /* pm has been used once already */ | |
183 | #define PMf_ONCE 0x0002 /* use pattern only once per reset */ | |
184 | #define PMf_SCANFIRST 0x0004 /* initial constant not anchored */ | |
185 | #define PMf_ALL 0x0008 /* initial constant is whole pat */ | |
186 | #define PMf_SKIPWHITE 0x0010 /* skip leading whitespace for split */ | |
187 | #define PMf_FOLD 0x0020 /* case insensitivity */ | |
188 | #define PMf_CONST 0x0040 /* subst replacement is constant */ | |
189 | #define PMf_KEEP 0x0080 /* keep 1st runtime pattern forever */ | |
190 | #define PMf_GLOBAL 0x0100 /* pattern had a g modifier */ | |
c90c0ff4 | 191 | #define PMf_CONTINUE 0x0200 /* don't reset pos() if //g fails */ |
a0d0e21e LW |
192 | #define PMf_EVAL 0x0400 /* evaluating replacement as expr */ |
193 | #define PMf_WHITE 0x0800 /* pattern is \s+ */ | |
194 | #define PMf_MULTILINE 0x1000 /* assume multiple lines */ | |
195 | #define PMf_SINGLELINE 0x2000 /* assume single line */ | |
bbce6d69 | 196 | #define PMf_LOCALE 0x4000 /* use locale for character types */ |
a0d0e21e | 197 | #define PMf_EXTENDED 0x8000 /* chuck embedded whitespace */ |
79072805 LW |
198 | |
199 | struct svop { | |
200 | BASEOP | |
201 | SV * op_sv; | |
202 | }; | |
203 | ||
204 | struct gvop { | |
205 | BASEOP | |
206 | GV * op_gv; | |
207 | }; | |
208 | ||
209 | struct pvop { | |
210 | BASEOP | |
211 | char * op_pv; | |
212 | }; | |
213 | ||
79072805 LW |
214 | struct loop { |
215 | BASEOP | |
216 | OP * op_first; | |
217 | OP * op_last; | |
218 | U32 op_children; | |
219 | OP * op_redoop; | |
220 | OP * op_nextop; | |
221 | OP * op_lastop; | |
222 | }; | |
223 | ||
224 | #define cUNOP ((UNOP*)op) | |
225 | #define cBINOP ((BINOP*)op) | |
226 | #define cLISTOP ((LISTOP*)op) | |
227 | #define cLOGOP ((LOGOP*)op) | |
228 | #define cCONDOP ((CONDOP*)op) | |
229 | #define cPMOP ((PMOP*)op) | |
230 | #define cSVOP ((SVOP*)op) | |
231 | #define cGVOP ((GVOP*)op) | |
232 | #define cPVOP ((PVOP*)op) | |
79072805 LW |
233 | #define cCOP ((COP*)op) |
234 | #define cLOOP ((LOOP*)op) | |
235 | ||
236 | #define kUNOP ((UNOP*)kid) | |
237 | #define kBINOP ((BINOP*)kid) | |
238 | #define kLISTOP ((LISTOP*)kid) | |
239 | #define kLOGOP ((LOGOP*)kid) | |
240 | #define kCONDOP ((CONDOP*)kid) | |
241 | #define kPMOP ((PMOP*)kid) | |
242 | #define kSVOP ((SVOP*)kid) | |
243 | #define kGVOP ((GVOP*)kid) | |
244 | #define kPVOP ((PVOP*)kid) | |
79072805 LW |
245 | #define kCOP ((COP*)kid) |
246 | #define kLOOP ((LOOP*)kid) | |
247 | ||
248 | #define Nullop Null(OP*) | |
249 | ||
a0d0e21e LW |
250 | /* Lowest byte of opargs */ |
251 | #define OA_MARK 1 | |
252 | #define OA_FOLDCONST 2 | |
253 | #define OA_RETSCALAR 4 | |
254 | #define OA_TARGET 8 | |
255 | #define OA_RETINTEGER 16 | |
256 | #define OA_OTHERINT 32 | |
257 | #define OA_DANGEROUS 64 | |
258 | #define OA_DEFGV 128 | |
259 | ||
260 | #define OASHIFT 8 | |
261 | ||
262 | /* Remaining nybbles of opargs */ | |
263 | #define OA_SCALAR 1 | |
264 | #define OA_LIST 2 | |
265 | #define OA_AVREF 3 | |
266 | #define OA_HVREF 4 | |
267 | #define OA_CVREF 5 | |
268 | #define OA_FILEREF 6 | |
269 | #define OA_SCALARREF 7 | |
270 | #define OA_OPTIONAL 8 | |
271 |