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)
49 /* We muck with cxstack_ix since _dec may call a DESTROY, overwriting cx. */
52 if (cx->blk_sub.hasargs) { \
53 /* put back old @_ */ \
54 SvREFCNT_dec(GvAV(defgv)); \
55 GvAV(defgv) = cx->blk_sub.savearray; \
56 /* destroy arg array */ \
57 av_clear(cx->blk_sub.argarray); \
58 AvREAL_off(cx->blk_sub.argarray); \
60 if (cx->blk_sub.cv) { \
61 if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth)) { \
63 SvREFCNT_dec((SV*)cx->blk_sub.cv); \
68 #define POPFORMAT(cx) \
69 setdefout(cx->blk_sub.dfoutgv); \
70 SvREFCNT_dec(cx->blk_sub.dfoutgv);
81 #define PUSHEVAL(cx,n,fgv) \
82 cx->blk_eval.old_in_eval = in_eval; \
83 cx->blk_eval.old_op_type = op->op_type; \
84 cx->blk_eval.old_name = n; \
85 cx->blk_eval.old_eval_root = eval_root; \
86 cx->blk_eval.cur_text = linestr;
89 in_eval = cx->blk_eval.old_in_eval; \
90 optype = cx->blk_eval.old_op_type; \
91 eval_root = cx->blk_eval.old_eval_root;
107 #define PUSHLOOP(cx, ivar, s) \
108 cx->blk_loop.label = curcop->cop_label; \
109 cx->blk_loop.resetsp = s - stack_base; \
110 cx->blk_loop.redo_op = cLOOP->op_redoop; \
111 cx->blk_loop.next_op = cLOOP->op_nextop; \
112 cx->blk_loop.last_op = cLOOP->op_lastop; \
113 if (cx->blk_loop.itervar = (ivar)) \
114 cx->blk_loop.itersave = SvREFCNT_inc(*cx->blk_loop.itervar);\
115 cx->blk_loop.iterlval = Nullsv; \
116 cx->blk_loop.iterary = Nullav; \
117 cx->blk_loop.iterix = -1;
119 #define POPLOOP(cx) \
120 newsp = stack_base + cx->blk_loop.resetsp; \
121 SvREFCNT_dec(cx->blk_loop.iterlval); \
122 if (cx->blk_loop.itervar) { \
123 SvREFCNT_dec(*cx->blk_loop.itervar); \
124 *cx->blk_loop.itervar = cx->blk_loop.itersave; \
126 if (cx->blk_loop.iterary && cx->blk_loop.iterary != curstack) \
127 SvREFCNT_dec(cx->blk_loop.iterary);
129 /* context common to subroutines, evals and loops */
131 I32 blku_oldsp; /* stack pointer to copy stuff down to */
132 COP * blku_oldcop; /* old curcop pointer */
133 I32 blku_oldretsp; /* return stack index */
134 I32 blku_oldmarksp; /* mark stack index */
135 I32 blku_oldscopesp; /* scope stack index */
136 PMOP * blku_oldpm; /* values of pattern match vars */
137 U8 blku_gimme; /* is this block running in list context? */
140 struct block_sub blku_sub;
141 struct block_eval blku_eval;
142 struct block_loop blku_loop;
145 #define blk_oldsp cx_u.cx_blk.blku_oldsp
146 #define blk_oldcop cx_u.cx_blk.blku_oldcop
147 #define blk_oldretsp cx_u.cx_blk.blku_oldretsp
148 #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
149 #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
150 #define blk_oldpm cx_u.cx_blk.blku_oldpm
151 #define blk_gimme cx_u.cx_blk.blku_gimme
152 #define blk_sub cx_u.cx_blk.blk_u.blku_sub
153 #define blk_eval cx_u.cx_blk.blk_u.blku_eval
154 #define blk_loop cx_u.cx_blk.blk_u.blku_loop
157 #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
159 cx->blk_oldsp = sp - stack_base, \
160 cx->blk_oldcop = curcop, \
161 cx->blk_oldmarksp = markstack_ptr - markstack, \
162 cx->blk_oldscopesp = scopestack_ix, \
163 cx->blk_oldretsp = retstack_ix, \
164 cx->blk_oldpm = curpm, \
165 cx->blk_gimme = gimme; \
166 DEBUG_l( PerlIO_printf(PerlIO_stderr(), "Entering block %ld, type %s\n", \
167 (long)cxstack_ix, block_type[t]); )
169 /* Exit a block (RETURN and LAST). */
170 #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \
171 newsp = stack_base + cx->blk_oldsp, \
172 curcop = cx->blk_oldcop, \
173 markstack_ptr = markstack + cx->blk_oldmarksp, \
174 scopestack_ix = cx->blk_oldscopesp, \
175 retstack_ix = cx->blk_oldretsp, \
176 pm = cx->blk_oldpm, \
177 gimme = cx->blk_gimme; \
178 DEBUG_l( PerlIO_printf(PerlIO_stderr(), "Leaving block %ld, type %s\n", \
179 (long)cxstack_ix+1,block_type[cx->cx_type]); )
181 /* Continue a block elsewhere (NEXT and REDO). */
182 #define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \
183 stack_sp = stack_base + cx->blk_oldsp, \
184 markstack_ptr = markstack + cx->blk_oldmarksp, \
185 scopestack_ix = cx->blk_oldscopesp, \
186 retstack_ix = cx->blk_oldretsp
188 /* substitution context */
205 #define sb_iters cx_u.cx_subst.sbu_iters
206 #define sb_maxiters cx_u.cx_subst.sbu_maxiters
207 #define sb_safebase cx_u.cx_subst.sbu_safebase
208 #define sb_oldsave cx_u.cx_subst.sbu_oldsave
209 #define sb_once cx_u.cx_subst.sbu_once
210 #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
211 #define sb_orig cx_u.cx_subst.sbu_orig
212 #define sb_dstr cx_u.cx_subst.sbu_dstr
213 #define sb_targ cx_u.cx_subst.sbu_targ
214 #define sb_s cx_u.cx_subst.sbu_s
215 #define sb_m cx_u.cx_subst.sbu_m
216 #define sb_strend cx_u.cx_subst.sbu_strend
217 #define sb_subbase cx_u.cx_subst.sbu_subbase
218 #define sb_rx cx_u.cx_subst.sbu_rx
220 #define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
221 cx->sb_iters = iters, \
222 cx->sb_maxiters = maxiters, \
223 cx->sb_safebase = safebase, \
224 cx->sb_oldsave = oldsave, \
225 cx->sb_once = once, \
226 cx->sb_rxtainted = rxtainted, \
227 cx->sb_orig = orig, \
228 cx->sb_dstr = dstr, \
229 cx->sb_targ = targ, \
232 cx->sb_strend = strend, \
234 cx->cx_type = CXt_SUBST
236 #define POPSUBST(cx) cxstack_ix--
239 I32 cx_type; /* what kind of context this is */
242 struct subst cx_subst;
252 #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
258 /* extra flags for perl_call_* routines */
259 #define G_DISCARD 2 /* Call FREETMPS. */
260 #define G_EVAL 4 /* Assume eval {} around subroutine call. */
261 #define G_NOARGS 8 /* Don't construct a @_ array. */
262 #define G_KEEPERR 16 /* Append errors to $@ rather than overwriting it */