Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* cop.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 | ||
79072805 LW |
10 | struct cop { |
11 | BASEOP | |
a0d0e21e | 12 | char * cop_label; /* label for this construct */ |
79072805 LW |
13 | HV * cop_stash; /* package line was compiled in */ |
14 | GV * cop_filegv; /* file the following line # is from */ | |
a0d0e21e LW |
15 | U32 cop_seq; /* parse sequence number */ |
16 | I32 cop_arybase; /* array base this line was compiled with */ | |
79072805 | 17 | line_t cop_line; /* line # of this command */ |
79072805 LW |
18 | }; |
19 | ||
20 | #define Nullcop Null(COP*) | |
21 | ||
22 | /* | |
23 | * Here we have some enormously heavy (or at least ponderous) wizardry. | |
24 | */ | |
25 | ||
26 | /* subroutine context */ | |
27 | struct block_sub { | |
28 | CV * cv; | |
29 | GV * gv; | |
463ee0b2 | 30 | GV * dfoutgv; |
79072805 LW |
31 | AV * savearray; |
32 | AV * argarray; | |
33 | U16 olddepth; | |
34 | U8 hasargs; | |
35 | }; | |
36 | ||
37 | #define PUSHSUB(cx) \ | |
38 | cx->blk_sub.cv = cv; \ | |
79072805 LW |
39 | cx->blk_sub.olddepth = CvDEPTH(cv); \ |
40 | cx->blk_sub.hasargs = hasargs; | |
41 | ||
42 | #define PUSHFORMAT(cx) \ | |
43 | cx->blk_sub.cv = cv; \ | |
44 | cx->blk_sub.gv = gv; \ | |
463ee0b2 | 45 | cx->blk_sub.dfoutgv = defoutgv; \ |
79072805 LW |
46 | cx->blk_sub.hasargs = 0; |
47 | ||
48 | #define POPSUB(cx) \ | |
49 | if (cx->blk_sub.hasargs) { /* put back old @_ */ \ | |
79072805 LW |
50 | GvAV(defgv) = cx->blk_sub.savearray; \ |
51 | } \ | |
8990e307 LW |
52 | if (cx->blk_sub.cv) { \ |
53 | if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth)) { \ | |
a0d0e21e | 54 | SvREFCNT_dec((SV*)cx->blk_sub.cv); \ |
8990e307 | 55 | } \ |
79072805 LW |
56 | } |
57 | ||
58 | #define POPFORMAT(cx) \ | |
463ee0b2 | 59 | defoutgv = cx->blk_sub.dfoutgv; |
79072805 LW |
60 | |
61 | /* eval context */ | |
62 | struct block_eval { | |
63 | I32 old_in_eval; | |
64 | I32 old_op_type; | |
65 | char * old_name; | |
66 | OP * old_eval_root; | |
67 | }; | |
68 | ||
8990e307 | 69 | #define PUSHEVAL(cx,n,fgv) \ |
79072805 LW |
70 | cx->blk_eval.old_in_eval = in_eval; \ |
71 | cx->blk_eval.old_op_type = op->op_type; \ | |
72 | cx->blk_eval.old_name = n; \ | |
73 | cx->blk_eval.old_eval_root = eval_root; | |
74 | ||
75 | #define POPEVAL(cx) \ | |
76 | in_eval = cx->blk_eval.old_in_eval; \ | |
77 | optype = cx->blk_eval.old_op_type; \ | |
78 | eval_root = cx->blk_eval.old_eval_root; | |
79 | ||
80 | /* loop context */ | |
81 | struct block_loop { | |
82 | char * label; | |
83 | I32 resetsp; | |
84 | OP * redo_op; | |
85 | OP * next_op; | |
86 | OP * last_op; | |
87 | SV ** itervar; | |
88 | SV * itersave; | |
89 | AV * iterary; | |
90 | I32 iterix; | |
91 | }; | |
92 | ||
93 | #define PUSHLOOP(cx, ivar, s) \ | |
94 | cx->blk_loop.label = curcop->cop_label; \ | |
95 | cx->blk_loop.resetsp = s - stack_base; \ | |
96 | cx->blk_loop.redo_op = cLOOP->op_redoop; \ | |
97 | cx->blk_loop.next_op = cLOOP->op_nextop; \ | |
98 | cx->blk_loop.last_op = cLOOP->op_lastop; \ | |
99 | cx->blk_loop.itervar = ivar; \ | |
100 | if (ivar) \ | |
101 | cx->blk_loop.itersave = *cx->blk_loop.itervar; | |
102 | ||
103 | #define POPLOOP(cx) \ | |
104 | newsp = stack_base + cx->blk_loop.resetsp; \ | |
105 | if (cx->blk_loop.itervar) \ | |
106 | *cx->blk_loop.itervar = cx->blk_loop.itersave; | |
107 | ||
108 | /* context common to subroutines, evals and loops */ | |
109 | struct block { | |
110 | I32 blku_oldsp; /* stack pointer to copy stuff down to */ | |
111 | COP * blku_oldcop; /* old curcop pointer */ | |
112 | I32 blku_oldretsp; /* return stack index */ | |
113 | I32 blku_oldmarksp; /* mark stack index */ | |
114 | I32 blku_oldscopesp; /* scope stack index */ | |
115 | PMOP * blku_oldpm; /* values of pattern match vars */ | |
116 | U8 blku_gimme; /* is this block running in list context? */ | |
117 | ||
118 | union { | |
119 | struct block_sub blku_sub; | |
120 | struct block_eval blku_eval; | |
121 | struct block_loop blku_loop; | |
122 | } blk_u; | |
123 | }; | |
124 | #define blk_oldsp cx_u.cx_blk.blku_oldsp | |
125 | #define blk_oldcop cx_u.cx_blk.blku_oldcop | |
126 | #define blk_oldretsp cx_u.cx_blk.blku_oldretsp | |
127 | #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp | |
128 | #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp | |
129 | #define blk_oldpm cx_u.cx_blk.blku_oldpm | |
130 | #define blk_gimme cx_u.cx_blk.blku_gimme | |
131 | #define blk_sub cx_u.cx_blk.blk_u.blku_sub | |
132 | #define blk_eval cx_u.cx_blk.blk_u.blku_eval | |
133 | #define blk_loop cx_u.cx_blk.blk_u.blku_loop | |
134 | ||
135 | /* Enter a block. */ | |
8990e307 | 136 | #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \ |
79072805 | 137 | cx->cx_type = t, \ |
8990e307 | 138 | cx->blk_oldsp = sp - stack_base, \ |
79072805 LW |
139 | cx->blk_oldcop = curcop, \ |
140 | cx->blk_oldmarksp = markstack_ptr - markstack, \ | |
141 | cx->blk_oldscopesp = scopestack_ix, \ | |
142 | cx->blk_oldretsp = retstack_ix, \ | |
143 | cx->blk_oldpm = curpm, \ | |
144 | cx->blk_gimme = gimme; \ | |
a0d0e21e LW |
145 | DEBUG_l( fprintf(stderr,"Entering block %ld, type %s\n", \ |
146 | (long)cxstack_ix, block_type[t]); ) | |
79072805 LW |
147 | |
148 | /* Exit a block (RETURN and LAST). */ | |
a0d0e21e | 149 | #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \ |
79072805 LW |
150 | newsp = stack_base + cx->blk_oldsp, \ |
151 | curcop = cx->blk_oldcop, \ | |
152 | markstack_ptr = markstack + cx->blk_oldmarksp, \ | |
153 | scopestack_ix = cx->blk_oldscopesp, \ | |
154 | retstack_ix = cx->blk_oldretsp, \ | |
a0d0e21e | 155 | pm = cx->blk_oldpm, \ |
79072805 | 156 | gimme = cx->blk_gimme; \ |
a0d0e21e LW |
157 | DEBUG_l( fprintf(stderr,"Leaving block %ld, type %s\n", \ |
158 | (long)cxstack_ix+1,block_type[cx->cx_type]); ) | |
79072805 LW |
159 | |
160 | /* Continue a block elsewhere (NEXT and REDO). */ | |
161 | #define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \ | |
162 | stack_sp = stack_base + cx->blk_oldsp, \ | |
163 | markstack_ptr = markstack + cx->blk_oldmarksp, \ | |
164 | scopestack_ix = cx->blk_oldscopesp, \ | |
165 | retstack_ix = cx->blk_oldretsp | |
166 | ||
167 | /* substitution context */ | |
168 | struct subst { | |
169 | I32 sbu_iters; | |
170 | I32 sbu_maxiters; | |
171 | I32 sbu_safebase; | |
172 | I32 sbu_once; | |
173 | char * sbu_orig; | |
174 | SV * sbu_dstr; | |
175 | SV * sbu_targ; | |
176 | char * sbu_s; | |
177 | char * sbu_m; | |
178 | char * sbu_strend; | |
179 | char * sbu_subbase; | |
180 | }; | |
181 | #define sb_iters cx_u.cx_subst.sbu_iters | |
182 | #define sb_maxiters cx_u.cx_subst.sbu_maxiters | |
183 | #define sb_safebase cx_u.cx_subst.sbu_safebase | |
184 | #define sb_once cx_u.cx_subst.sbu_once | |
185 | #define sb_orig cx_u.cx_subst.sbu_orig | |
186 | #define sb_dstr cx_u.cx_subst.sbu_dstr | |
187 | #define sb_targ cx_u.cx_subst.sbu_targ | |
188 | #define sb_s cx_u.cx_subst.sbu_s | |
189 | #define sb_m cx_u.cx_subst.sbu_m | |
190 | #define sb_strend cx_u.cx_subst.sbu_strend | |
191 | #define sb_subbase cx_u.cx_subst.sbu_subbase | |
192 | ||
193 | #define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \ | |
194 | cx->sb_iters = iters, \ | |
195 | cx->sb_maxiters = maxiters, \ | |
196 | cx->sb_safebase = safebase, \ | |
197 | cx->sb_once = once, \ | |
198 | cx->sb_orig = orig, \ | |
199 | cx->sb_dstr = dstr, \ | |
200 | cx->sb_targ = targ, \ | |
201 | cx->sb_s = s, \ | |
202 | cx->sb_m = m, \ | |
203 | cx->sb_strend = strend, \ | |
204 | cx->cx_type = CXt_SUBST | |
205 | ||
206 | #define POPSUBST(cx) cxstack_ix-- | |
207 | ||
208 | struct context { | |
209 | I32 cx_type; /* what kind of context this is */ | |
210 | union { | |
211 | struct block cx_blk; | |
212 | struct subst cx_subst; | |
213 | } cx_u; | |
214 | }; | |
215 | #define CXt_NULL 0 | |
216 | #define CXt_SUB 1 | |
217 | #define CXt_EVAL 2 | |
218 | #define CXt_LOOP 3 | |
219 | #define CXt_SUBST 4 | |
220 | #define CXt_BLOCK 5 | |
221 | ||
222 | #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) | |
223 | ||
224 | /* "gimme" values */ | |
a0d0e21e LW |
225 | #define G_SCALAR 0 |
226 | #define G_ARRAY 1 | |
79072805 | 227 | |
a0d0e21e LW |
228 | /* extra flags for perl_call_* routines */ |
229 | #define G_DISCARD 2 /* Call FREETMPS. */ | |
230 | #define G_EVAL 4 /* Assume eval {} around subroutine call. */ | |
231 | #define G_NOARGS 8 /* Don't construct a @_ array. */ |