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) { /* put back old @_ */ \
53 SvREFCNT_dec(GvAV(defgv)); \
54 GvAV(defgv) = cx->blk_sub.savearray; \
56 if (cx->blk_sub.cv) { \
57 if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth)) { \
59 SvREFCNT_dec((SV*)cx->blk_sub.cv); \
64 #define POPFORMAT(cx) \
65 setdefout(cx->blk_sub.dfoutgv); \
66 SvREFCNT_dec(cx->blk_sub.dfoutgv);
77 #define PUSHEVAL(cx,n,fgv) \
78 cx->blk_eval.old_in_eval = in_eval; \
79 cx->blk_eval.old_op_type = op->op_type; \
80 cx->blk_eval.old_name = n; \
81 cx->blk_eval.old_eval_root = eval_root; \
82 cx->blk_eval.cur_text = linestr;
85 in_eval = cx->blk_eval.old_in_eval; \
86 optype = cx->blk_eval.old_op_type; \
87 eval_root = cx->blk_eval.old_eval_root;
103 #define PUSHLOOP(cx, ivar, s) \
104 cx->blk_loop.label = curcop->cop_label; \
105 cx->blk_loop.resetsp = s - stack_base; \
106 cx->blk_loop.redo_op = cLOOP->op_redoop; \
107 cx->blk_loop.next_op = cLOOP->op_nextop; \
108 cx->blk_loop.last_op = cLOOP->op_lastop; \
109 if (cx->blk_loop.itervar = (ivar)) \
110 cx->blk_loop.itersave = SvREFCNT_inc(*cx->blk_loop.itervar);\
111 cx->blk_loop.iterlval = Nullsv; \
112 cx->blk_loop.iterary = Nullav; \
113 cx->blk_loop.iterix = -1;
115 #define POPLOOP(cx) \
116 newsp = stack_base + cx->blk_loop.resetsp; \
117 SvREFCNT_dec(cx->blk_loop.iterlval); \
118 if (cx->blk_loop.itervar) { \
119 SvREFCNT_dec(*cx->blk_loop.itervar); \
120 *cx->blk_loop.itervar = cx->blk_loop.itersave; \
122 if (cx->blk_loop.iterary && cx->blk_loop.iterary != curstack) \
123 SvREFCNT_dec(cx->blk_loop.iterary);
125 /* context common to subroutines, evals and loops */
127 I32 blku_oldsp; /* stack pointer to copy stuff down to */
128 COP * blku_oldcop; /* old curcop pointer */
129 I32 blku_oldretsp; /* return stack index */
130 I32 blku_oldmarksp; /* mark stack index */
131 I32 blku_oldscopesp; /* scope stack index */
132 PMOP * blku_oldpm; /* values of pattern match vars */
133 U8 blku_gimme; /* is this block running in list context? */
136 struct block_sub blku_sub;
137 struct block_eval blku_eval;
138 struct block_loop blku_loop;
141 #define blk_oldsp cx_u.cx_blk.blku_oldsp
142 #define blk_oldcop cx_u.cx_blk.blku_oldcop
143 #define blk_oldretsp cx_u.cx_blk.blku_oldretsp
144 #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
145 #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
146 #define blk_oldpm cx_u.cx_blk.blku_oldpm
147 #define blk_gimme cx_u.cx_blk.blku_gimme
148 #define blk_sub cx_u.cx_blk.blk_u.blku_sub
149 #define blk_eval cx_u.cx_blk.blk_u.blku_eval
150 #define blk_loop cx_u.cx_blk.blk_u.blku_loop
153 #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
155 cx->blk_oldsp = sp - stack_base, \
156 cx->blk_oldcop = curcop, \
157 cx->blk_oldmarksp = markstack_ptr - markstack, \
158 cx->blk_oldscopesp = scopestack_ix, \
159 cx->blk_oldretsp = retstack_ix, \
160 cx->blk_oldpm = curpm, \
161 cx->blk_gimme = gimme; \
162 DEBUG_l( PerlIO_printf(PerlIO_stderr(), "Entering block %ld, type %s\n", \
163 (long)cxstack_ix, block_type[t]); )
165 /* Exit a block (RETURN and LAST). */
166 #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \
167 newsp = stack_base + cx->blk_oldsp, \
168 curcop = cx->blk_oldcop, \
169 markstack_ptr = markstack + cx->blk_oldmarksp, \
170 scopestack_ix = cx->blk_oldscopesp, \
171 retstack_ix = cx->blk_oldretsp, \
172 pm = cx->blk_oldpm, \
173 gimme = cx->blk_gimme; \
174 DEBUG_l( PerlIO_printf(PerlIO_stderr(), "Leaving block %ld, type %s\n", \
175 (long)cxstack_ix+1,block_type[cx->cx_type]); )
177 /* Continue a block elsewhere (NEXT and REDO). */
178 #define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \
179 stack_sp = stack_base + cx->blk_oldsp, \
180 markstack_ptr = markstack + cx->blk_oldmarksp, \
181 scopestack_ix = cx->blk_oldscopesp, \
182 retstack_ix = cx->blk_oldretsp
184 /* substitution context */
201 #define sb_iters cx_u.cx_subst.sbu_iters
202 #define sb_maxiters cx_u.cx_subst.sbu_maxiters
203 #define sb_safebase cx_u.cx_subst.sbu_safebase
204 #define sb_oldsave cx_u.cx_subst.sbu_oldsave
205 #define sb_once cx_u.cx_subst.sbu_once
206 #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
207 #define sb_orig cx_u.cx_subst.sbu_orig
208 #define sb_dstr cx_u.cx_subst.sbu_dstr
209 #define sb_targ cx_u.cx_subst.sbu_targ
210 #define sb_s cx_u.cx_subst.sbu_s
211 #define sb_m cx_u.cx_subst.sbu_m
212 #define sb_strend cx_u.cx_subst.sbu_strend
213 #define sb_subbase cx_u.cx_subst.sbu_subbase
214 #define sb_rx cx_u.cx_subst.sbu_rx
216 #define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
217 cx->sb_iters = iters, \
218 cx->sb_maxiters = maxiters, \
219 cx->sb_safebase = safebase, \
220 cx->sb_oldsave = oldsave, \
221 cx->sb_once = once, \
222 cx->sb_rxtainted = rxtainted, \
223 cx->sb_orig = orig, \
224 cx->sb_dstr = dstr, \
225 cx->sb_targ = targ, \
228 cx->sb_strend = strend, \
230 cx->cx_type = CXt_SUBST
232 #define POPSUBST(cx) cxstack_ix--
235 I32 cx_type; /* what kind of context this is */
238 struct subst cx_subst;
248 #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
254 /* extra flags for perl_call_* routines */
255 #define G_DISCARD 2 /* Call FREETMPS. */
256 #define G_EVAL 4 /* Assume eval {} around subroutine call. */
257 #define G_NOARGS 8 /* Don't construct a @_ array. */
258 #define G_KEEPERR 16 /* Append errors to $@ rather than overwriting it */