3 * Copyright (c) 1991-1994, Larry Wall
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.
12 char * cop_label; /* label for this construct */
13 HV * cop_stash; /* package line was compiled in */
14 GV * cop_filegv; /* file the following line # is from */
15 U32 cop_seq; /* parse sequence number */
16 I32 cop_arybase; /* array base this line was compiled with */
17 line_t cop_line; /* line # of this command */
20 #define Nullcop Null(COP*)
23 * Here we have some enormously heavy (or at least ponderous) wizardry.
26 /* subroutine context */
38 cx->blk_sub.cv = cv; \
39 cx->blk_sub.olddepth = CvDEPTH(cv); \
40 cx->blk_sub.hasargs = hasargs;
42 #define PUSHFORMAT(cx) \
43 cx->blk_sub.cv = cv; \
44 cx->blk_sub.gv = gv; \
45 cx->blk_sub.hasargs = 0; \
46 cx->blk_sub.dfoutgv = defoutgv; \
47 (void)SvREFCNT_inc(cx->blk_sub.dfoutgv)
50 { struct block_sub cxsub; \
55 cxsub = cx->blk_sub; /* because DESTROY may clobber *cx */
58 if (cxsub.hasargs) { \
59 /* put back old @_ */ \
60 SvREFCNT_dec(GvAV(defgv)); \
61 GvAV(defgv) = cxsub.savearray; \
62 /* destroy arg array */ \
63 av_clear(cxsub.argarray); \
64 AvREAL_off(cxsub.argarray); \
67 if (!(CvDEPTH(cxsub.cv) = cxsub.olddepth)) \
68 SvREFCNT_dec(cxsub.cv); \
71 #define POPFORMAT(cx) \
72 setdefout(cx->blk_sub.dfoutgv); \
73 SvREFCNT_dec(cx->blk_sub.dfoutgv);
84 #define PUSHEVAL(cx,n,fgv) \
85 cx->blk_eval.old_in_eval = in_eval; \
86 cx->blk_eval.old_op_type = op->op_type; \
87 cx->blk_eval.old_name = n; \
88 cx->blk_eval.old_eval_root = eval_root; \
89 cx->blk_eval.cur_text = linestr;
92 in_eval = cx->blk_eval.old_in_eval; \
93 optype = cx->blk_eval.old_op_type; \
94 eval_root = cx->blk_eval.old_eval_root;
110 #define PUSHLOOP(cx, ivar, s) \
111 cx->blk_loop.label = curcop->cop_label; \
112 cx->blk_loop.resetsp = s - stack_base; \
113 cx->blk_loop.redo_op = cLOOP->op_redoop; \
114 cx->blk_loop.next_op = cLOOP->op_nextop; \
115 cx->blk_loop.last_op = cLOOP->op_lastop; \
116 if (cx->blk_loop.itervar = (ivar)) \
117 cx->blk_loop.itersave = SvREFCNT_inc(*cx->blk_loop.itervar);\
118 cx->blk_loop.iterlval = Nullsv; \
119 cx->blk_loop.iterary = Nullav; \
120 cx->blk_loop.iterix = -1;
122 #define POPLOOP(cx) \
123 { struct block_loop cxloop; \
127 #define POPLOOP1(cx) \
128 cxloop = cx->blk_loop; /* because DESTROY may clobber *cx */ \
129 newsp = stack_base + cxloop.resetsp;
132 SvREFCNT_dec(cxloop.iterlval); \
133 if (cxloop.itervar) { \
134 SvREFCNT_dec(*cxloop.itervar); \
135 *cxloop.itervar = cxloop.itersave; \
137 if (cxloop.iterary && cxloop.iterary != curstack) \
138 SvREFCNT_dec(cxloop.iterary);
140 /* context common to subroutines, evals and loops */
142 I32 blku_oldsp; /* stack pointer to copy stuff down to */
143 COP * blku_oldcop; /* old curcop pointer */
144 I32 blku_oldretsp; /* return stack index */
145 I32 blku_oldmarksp; /* mark stack index */
146 I32 blku_oldscopesp; /* scope stack index */
147 PMOP * blku_oldpm; /* values of pattern match vars */
148 U8 blku_gimme; /* is this block running in list context? */
151 struct block_sub blku_sub;
152 struct block_eval blku_eval;
153 struct block_loop blku_loop;
156 #define blk_oldsp cx_u.cx_blk.blku_oldsp
157 #define blk_oldcop cx_u.cx_blk.blku_oldcop
158 #define blk_oldretsp cx_u.cx_blk.blku_oldretsp
159 #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
160 #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
161 #define blk_oldpm cx_u.cx_blk.blku_oldpm
162 #define blk_gimme cx_u.cx_blk.blku_gimme
163 #define blk_sub cx_u.cx_blk.blk_u.blku_sub
164 #define blk_eval cx_u.cx_blk.blk_u.blku_eval
165 #define blk_loop cx_u.cx_blk.blk_u.blku_loop
168 #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
170 cx->blk_oldsp = sp - stack_base, \
171 cx->blk_oldcop = curcop, \
172 cx->blk_oldmarksp = markstack_ptr - markstack, \
173 cx->blk_oldscopesp = scopestack_ix, \
174 cx->blk_oldretsp = retstack_ix, \
175 cx->blk_oldpm = curpm, \
176 cx->blk_gimme = gimme; \
177 DEBUG_l( PerlIO_printf(PerlIO_stderr(), "Entering block %ld, type %s\n", \
178 (long)cxstack_ix, block_type[t]); )
180 /* Exit a block (RETURN and LAST). */
181 #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \
182 newsp = stack_base + cx->blk_oldsp, \
183 curcop = cx->blk_oldcop, \
184 markstack_ptr = markstack + cx->blk_oldmarksp, \
185 scopestack_ix = cx->blk_oldscopesp, \
186 retstack_ix = cx->blk_oldretsp, \
187 pm = cx->blk_oldpm, \
188 gimme = cx->blk_gimme; \
189 DEBUG_l( PerlIO_printf(PerlIO_stderr(), "Leaving block %ld, type %s\n", \
190 (long)cxstack_ix+1,block_type[cx->cx_type]); )
192 /* Continue a block elsewhere (NEXT and REDO). */
193 #define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \
194 stack_sp = stack_base + cx->blk_oldsp, \
195 markstack_ptr = markstack + cx->blk_oldmarksp, \
196 scopestack_ix = cx->blk_oldscopesp, \
197 retstack_ix = cx->blk_oldretsp
199 /* substitution context */
216 #define sb_iters cx_u.cx_subst.sbu_iters
217 #define sb_maxiters cx_u.cx_subst.sbu_maxiters
218 #define sb_safebase cx_u.cx_subst.sbu_safebase
219 #define sb_oldsave cx_u.cx_subst.sbu_oldsave
220 #define sb_once cx_u.cx_subst.sbu_once
221 #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
222 #define sb_orig cx_u.cx_subst.sbu_orig
223 #define sb_dstr cx_u.cx_subst.sbu_dstr
224 #define sb_targ cx_u.cx_subst.sbu_targ
225 #define sb_s cx_u.cx_subst.sbu_s
226 #define sb_m cx_u.cx_subst.sbu_m
227 #define sb_strend cx_u.cx_subst.sbu_strend
228 #define sb_subbase cx_u.cx_subst.sbu_subbase
229 #define sb_rx cx_u.cx_subst.sbu_rx
231 #define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
232 cx->sb_iters = iters, \
233 cx->sb_maxiters = maxiters, \
234 cx->sb_safebase = safebase, \
235 cx->sb_oldsave = oldsave, \
236 cx->sb_once = once, \
237 cx->sb_rxtainted = rxtainted, \
238 cx->sb_orig = orig, \
239 cx->sb_dstr = dstr, \
240 cx->sb_targ = targ, \
243 cx->sb_strend = strend, \
245 cx->cx_type = CXt_SUBST
247 #define POPSUBST(cx) cxstack_ix--
250 I32 cx_type; /* what kind of context this is */
253 struct subst cx_subst;
263 #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
269 /* extra flags for perl_call_* routines */
270 #define G_DISCARD 2 /* Call FREETMPS. */
271 #define G_EVAL 4 /* Assume eval {} around subroutine call. */
272 #define G_NOARGS 8 /* Don't construct a @_ array. */
273 #define G_KEEPERR 16 /* Append errors to $@ rather than overwriting it */