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.dfoutgv = defoutgv; \
46 cx->blk_sub.hasargs = 0;
49 if (cx->blk_sub.hasargs) { /* put back old @_ */ \
50 GvAV(defgv) = cx->blk_sub.savearray; \
52 if (cx->blk_sub.cv) { \
53 if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth)) { \
54 SvREFCNT_dec((SV*)cx->blk_sub.cv); \
58 #define POPFORMAT(cx) \
59 defoutgv = cx->blk_sub.dfoutgv;
69 #define PUSHEVAL(cx,n,fgv) \
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;
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;
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; \
101 cx->blk_loop.itersave = *cx->blk_loop.itervar;
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;
108 /* context common to subroutines, evals and loops */
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? */
119 struct block_sub blku_sub;
120 struct block_eval blku_eval;
121 struct block_loop blku_loop;
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
136 #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
138 cx->blk_oldsp = sp - stack_base, \
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; \
145 DEBUG_l( fprintf(stderr,"Entering block %ld, type %s\n", \
146 (long)cxstack_ix, block_type[t]); )
148 /* Exit a block (RETURN and LAST). */
149 #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \
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, \
155 pm = cx->blk_oldpm, \
156 gimme = cx->blk_gimme; \
157 DEBUG_l( fprintf(stderr,"Leaving block %ld, type %s\n", \
158 (long)cxstack_ix+1,block_type[cx->cx_type]); )
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
167 /* substitution context */
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
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, \
203 cx->sb_strend = strend, \
204 cx->cx_type = CXt_SUBST
206 #define POPSUBST(cx) cxstack_ix--
209 I32 cx_type; /* what kind of context this is */
212 struct subst cx_subst;
222 #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
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. */