Commit | Line | Data |
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a0d0e21e | 1 | /* op.h |
79072805 | 2 | * |
a0d0e21e | 3 | * Copyright (c) 1991-1994, 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 | ||
26 | typedef U16 PADOFFSET; | |
27 | ||
28 | #ifdef DEBUGGING | |
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 | |
a0d0e21e | 44 | #define GIMME (op->op_flags & OPf_KNOW ? op->op_flags & OPf_LIST : cxstack[cxstack_ix].blk_gimme & G_ARRAY) |
79072805 LW |
45 | |
46 | /* Public flags */ | |
47 | #define OPf_LIST 1 /* Do operator in list context. */ | |
48 | #define OPf_KNOW 2 /* Context is known. */ | |
49 | #define OPf_KIDS 4 /* There is a firstborn child. */ | |
50 | #define OPf_PARENS 8 /* This operator was parenthesized. */ | |
463ee0b2 | 51 | /* (Or block needs explicit scope entry.) */ |
a0d0e21e LW |
52 | #define OPf_REF 16 /* Certified reference. */ |
53 | /* (Return container, not containee). */ | |
54 | #define OPf_MOD 32 /* Will modify (lvalue). */ | |
55 | #define OPf_STACKED 64 /* Some arg is arriving on the stack. */ | |
79072805 LW |
56 | #define OPf_SPECIAL 128 /* Do something weird for this op: */ |
57 | /* On local LVAL, don't init local value. */ | |
58 | /* On OP_SORT, subroutine is inlined. */ | |
59 | /* On OP_NOT, inversion was implicit. */ | |
a0d0e21e | 60 | /* On OP_LEAVE, don't restore curpm. */ |
79072805 LW |
61 | /* On truncate, we truncate filehandle */ |
62 | /* On control verbs, we saw no label */ | |
63 | /* On flipflop, we saw ... instead of .. */ | |
64 | /* On UNOPs, saw bare parens, e.g. eof(). */ | |
a0d0e21e | 65 | /* On OP_ENTERSUB || OP_NULL, saw a "do". */ |
79072805 | 66 | |
a0d0e21e LW |
67 | /* Private for lvalues */ |
68 | #define OPpLVAL_INTRO 128 /* Lvalue must be localized */ | |
69 | ||
70 | /* Private for OP_AASSIGN */ | |
71 | #define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */ | |
72 | ||
73 | /* Private for OP_SASSIGN */ | |
74 | #define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */ | |
79072805 LW |
75 | |
76 | /* Private for OP_TRANS */ | |
a0d0e21e LW |
77 | #define OPpTRANS_SQUASH 16 |
78 | #define OPpTRANS_DELETE 32 | |
79 | #define OPpTRANS_COMPLEMENT 64 | |
79072805 LW |
80 | |
81 | /* Private for OP_REPEAT */ | |
a0d0e21e | 82 | #define OPpREPEAT_DOLIST 64 /* List replication. */ |
79072805 | 83 | |
a0d0e21e | 84 | /* Private for OP_ENTERSUB, OP_RV2?V, OP_?ELEM */ |
85e6fe83 | 85 | /* (lower bits carry hints) */ |
a0d0e21e LW |
86 | #define OPpDEREF_DB 16 /* Debug subroutine. */ |
87 | #define OPpDEREF_AV 32 /* Want ref to AV. */ | |
88 | #define OPpDEREF_HV 64 /* Want ref to HV. */ | |
79072805 LW |
89 | |
90 | /* Private for OP_CONST */ | |
a0d0e21e | 91 | #define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */ |
79072805 LW |
92 | |
93 | /* Private for OP_FLIP/FLOP */ | |
a0d0e21e | 94 | #define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */ |
79072805 | 95 | |
ed6116ce | 96 | /* Private for OP_LIST */ |
a0d0e21e LW |
97 | #define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */ |
98 | ||
99 | /* Private for OP_LEAVE and friends */ | |
100 | #define OPpLEAVE_VOID 64 /* No need to copy out values. */ | |
ed6116ce | 101 | |
79072805 LW |
102 | struct op { |
103 | BASEOP | |
104 | }; | |
105 | ||
106 | struct unop { | |
107 | BASEOP | |
108 | OP * op_first; | |
109 | }; | |
110 | ||
111 | struct binop { | |
112 | BASEOP | |
113 | OP * op_first; | |
114 | OP * op_last; | |
115 | }; | |
116 | ||
117 | struct logop { | |
118 | BASEOP | |
119 | OP * op_first; | |
120 | OP * op_other; | |
121 | }; | |
122 | ||
123 | struct condop { | |
124 | BASEOP | |
125 | OP * op_first; | |
126 | OP * op_true; | |
127 | OP * op_false; | |
128 | }; | |
129 | ||
130 | struct listop { | |
131 | BASEOP | |
132 | OP * op_first; | |
133 | OP * op_last; | |
134 | U32 op_children; | |
135 | }; | |
136 | ||
137 | struct pmop { | |
138 | BASEOP | |
139 | OP * op_first; | |
140 | OP * op_last; | |
141 | U32 op_children; | |
142 | OP * op_pmreplroot; | |
143 | OP * op_pmreplstart; | |
144 | PMOP * op_pmnext; /* list of all scanpats */ | |
145 | REGEXP * op_pmregexp; /* compiled expression */ | |
146 | SV * op_pmshort; /* for a fast bypass of execute() */ | |
a0d0e21e | 147 | U16 op_pmflags; |
79072805 LW |
148 | char op_pmslen; |
149 | }; | |
a0d0e21e LW |
150 | |
151 | #define PMf_USED 0x0001 /* pm has been used once already */ | |
152 | #define PMf_ONCE 0x0002 /* use pattern only once per reset */ | |
153 | #define PMf_SCANFIRST 0x0004 /* initial constant not anchored */ | |
154 | #define PMf_ALL 0x0008 /* initial constant is whole pat */ | |
155 | #define PMf_SKIPWHITE 0x0010 /* skip leading whitespace for split */ | |
156 | #define PMf_FOLD 0x0020 /* case insensitivity */ | |
157 | #define PMf_CONST 0x0040 /* subst replacement is constant */ | |
158 | #define PMf_KEEP 0x0080 /* keep 1st runtime pattern forever */ | |
159 | #define PMf_GLOBAL 0x0100 /* pattern had a g modifier */ | |
160 | #define PMf_RUNTIME 0x0200 /* pattern coming in on the stack */ | |
161 | #define PMf_EVAL 0x0400 /* evaluating replacement as expr */ | |
162 | #define PMf_WHITE 0x0800 /* pattern is \s+ */ | |
163 | #define PMf_MULTILINE 0x1000 /* assume multiple lines */ | |
164 | #define PMf_SINGLELINE 0x2000 /* assume single line */ | |
165 | #define PMf_UNUSED 0x4000 /* (unused) */ | |
166 | #define PMf_EXTENDED 0x8000 /* chuck embedded whitespace */ | |
79072805 LW |
167 | |
168 | struct svop { | |
169 | BASEOP | |
170 | SV * op_sv; | |
171 | }; | |
172 | ||
173 | struct gvop { | |
174 | BASEOP | |
175 | GV * op_gv; | |
176 | }; | |
177 | ||
178 | struct pvop { | |
179 | BASEOP | |
180 | char * op_pv; | |
181 | }; | |
182 | ||
183 | struct cvop { | |
184 | BASEOP | |
185 | CV * op_cv; | |
186 | OP * op_cont; | |
187 | }; | |
188 | ||
189 | struct loop { | |
190 | BASEOP | |
191 | OP * op_first; | |
192 | OP * op_last; | |
193 | U32 op_children; | |
194 | OP * op_redoop; | |
195 | OP * op_nextop; | |
196 | OP * op_lastop; | |
197 | }; | |
198 | ||
199 | #define cUNOP ((UNOP*)op) | |
200 | #define cBINOP ((BINOP*)op) | |
201 | #define cLISTOP ((LISTOP*)op) | |
202 | #define cLOGOP ((LOGOP*)op) | |
203 | #define cCONDOP ((CONDOP*)op) | |
204 | #define cPMOP ((PMOP*)op) | |
205 | #define cSVOP ((SVOP*)op) | |
206 | #define cGVOP ((GVOP*)op) | |
207 | #define cPVOP ((PVOP*)op) | |
208 | #define cCVOP ((CVOP*)op) | |
209 | #define cCOP ((COP*)op) | |
210 | #define cLOOP ((LOOP*)op) | |
211 | ||
212 | #define kUNOP ((UNOP*)kid) | |
213 | #define kBINOP ((BINOP*)kid) | |
214 | #define kLISTOP ((LISTOP*)kid) | |
215 | #define kLOGOP ((LOGOP*)kid) | |
216 | #define kCONDOP ((CONDOP*)kid) | |
217 | #define kPMOP ((PMOP*)kid) | |
218 | #define kSVOP ((SVOP*)kid) | |
219 | #define kGVOP ((GVOP*)kid) | |
220 | #define kPVOP ((PVOP*)kid) | |
221 | #define kCVOP ((CVOP*)kid) | |
222 | #define kCOP ((COP*)kid) | |
223 | #define kLOOP ((LOOP*)kid) | |
224 | ||
225 | #define Nullop Null(OP*) | |
226 | ||
a0d0e21e LW |
227 | /* Lowest byte of opargs */ |
228 | #define OA_MARK 1 | |
229 | #define OA_FOLDCONST 2 | |
230 | #define OA_RETSCALAR 4 | |
231 | #define OA_TARGET 8 | |
232 | #define OA_RETINTEGER 16 | |
233 | #define OA_OTHERINT 32 | |
234 | #define OA_DANGEROUS 64 | |
235 | #define OA_DEFGV 128 | |
236 | ||
237 | #define OASHIFT 8 | |
238 | ||
239 | /* Remaining nybbles of opargs */ | |
240 | #define OA_SCALAR 1 | |
241 | #define OA_LIST 2 | |
242 | #define OA_AVREF 3 | |
243 | #define OA_HVREF 4 | |
244 | #define OA_CVREF 5 | |
245 | #define OA_FILEREF 6 | |
246 | #define OA_SCALARREF 7 | |
247 | #define OA_OPTIONAL 8 | |
248 |