-/* $RCSfile: op.c,v $$Revision: 4.1 $$Date: 92/08/07 17:19:16 $
+/* scope.c
*
- * Copyright (c) 1991, Larry Wall
+ * Copyright (c) 1991-1994, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
- * $Log: op.c,v $
+ */
+
+/*
+ * "For the fashion of Minas Tirith was such that it was built on seven
+ * levels..."
*/
#include "EXTERN.h"
#include "perl.h"
+SV**
+stack_grow(sp, p, n)
+SV** sp;
+SV** p;
+int n;
+{
+ stack_sp = sp;
+ av_extend(stack, (p - stack_base) + (n) + 128);
+ return stack_sp;
+}
+
I32
cxinc()
{
cxstack_max = cxstack_max * 3 / 2;
- Renew(cxstack, cxstack_max, CONTEXT);
+ Renew(cxstack, cxstack_max + 1, CONTEXT); /* XXX should fix CXINC macro */
return cxstack_ix + 1;
}
pop_scope()
{
I32 oldsave = scopestack[--scopestack_ix];
- if (savestack_ix > oldsave)
- leave_scope(oldsave);
+ LEAVE_SCOPE(oldsave);
+}
+
+void
+markstack_grow()
+{
+ I32 oldmax = markstack_max - markstack;
+ I32 newmax = oldmax * 3 / 2;
+
+ Renew(markstack, newmax, I32);
+ markstack_ptr = markstack + oldmax;
+ markstack_max = markstack + newmax;
}
void
while (tmps_ix > myfloor) { /* clean up after last statement */
SV* sv = tmps_stack[tmps_ix];
tmps_stack[tmps_ix--] = Nullsv;
- if (sv)
- sv_free(sv); /* note, can modify tmps_ix!!! */
+ if (sv) {
+#ifdef DEBUGGING
+ SvTEMP_off(sv);
+#endif
+ SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
+ }
}
}
SSPUSHINT(SAVEt_SV);
sv = GvSV(gv) = NEWSV(0,0);
- if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(sv)) {
+ if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
sv_upgrade(sv, SvTYPE(osv));
+ if (SvGMAGICAL(osv)) {
+ MAGIC* mg;
+ bool oldtainted = tainted;
+ mg_get(osv);
+ if (tainting && tainted && (mg = mg_find(osv, 't'))) {
+ SAVESPTR(mg->mg_obj);
+ mg->mg_obj = osv;
+ }
+ SvFLAGS(osv) |= (SvFLAGS(osv) &
+ (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
+ tainted = oldtainted;
+ }
SvMAGIC(sv) = SvMAGIC(osv);
- localizing = TRUE;
+ SvFLAGS(sv) |= SvMAGICAL(osv);
+ localizing = 1;
SvSETMAGIC(sv);
- localizing = FALSE;
+ localizing = 0;
}
return sv;
}
GP *ogp = GvGP(gv);
SSCHECK(3);
- SSPUSHPTR(gv);
+ SSPUSHPTR(SvREFCNT_inc(gv));
SSPUSHPTR(ogp);
SSPUSHINT(SAVEt_GP);
SSPUSHINT(SAVEt_SVREF);
sv = *sptr = NEWSV(0,0);
- if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(sv)) {
+ if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
sv_upgrade(sv, SvTYPE(osv));
+ if (SvGMAGICAL(osv)) {
+ MAGIC* mg;
+ bool oldtainted = tainted;
+ mg_get(osv);
+ if (tainting && tainted && (mg = mg_find(osv, 't'))) {
+ SAVESPTR(mg->mg_obj);
+ mg->mg_obj = osv;
+ }
+ SvFLAGS(osv) |= (SvFLAGS(osv) &
+ (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
+ tainted = oldtainted;
+ }
SvMAGIC(sv) = SvMAGIC(osv);
- localizing = TRUE;
+ SvFLAGS(sv) |= SvMAGICAL(osv);
+ localizing = 1;
SvSETMAGIC(sv);
- localizing = FALSE;
+ localizing = 0;
}
return sv;
}
}
void
+save_long(longp)
+long *longp;
+{
+ SSCHECK(3);
+ SSPUSHLONG(*longp);
+ SSPUSHPTR(longp);
+ SSPUSHINT(SAVEt_LONG);
+}
+
+void
save_I32(intp)
I32 *intp;
{
}
void
+save_iv(ivp)
+IV *ivp;
+{
+ SSCHECK(3);
+ SSPUSHIV(*ivp);
+ SSPUSHPTR(ivp);
+ SSPUSHINT(SAVEt_IV);
+}
+
+/* Cannot use save_sptr() to store a char* since the SV** cast will
+ * force word-alignment and we'll miss the pointer.
+ */
+void
+save_pptr(pptr)
+char **pptr;
+{
+ SSCHECK(3);
+ SSPUSHPTR(*pptr);
+ SSPUSHPTR(pptr);
+ SSPUSHINT(SAVEt_PPTR);
+}
+
+void
save_sptr(sptr)
SV **sptr;
{
HV **hptr;
{
SSCHECK(3);
- SSPUSHINT(*hptr);
+ SSPUSHPTR(*hptr);
SSPUSHPTR(hptr);
SSPUSHINT(SAVEt_HPTR);
}
AV **aptr;
{
SSCHECK(3);
- SSPUSHINT(*aptr);
+ SSPUSHPTR(*aptr);
SSPUSHPTR(aptr);
SSPUSHINT(SAVEt_APTR);
}
void
+save_freesv(sv)
+SV *sv;
+{
+ SSCHECK(2);
+ SSPUSHPTR(sv);
+ SSPUSHINT(SAVEt_FREESV);
+}
+
+void
+save_freeop(op)
+OP *op;
+{
+ SSCHECK(2);
+ SSPUSHPTR(op);
+ SSPUSHINT(SAVEt_FREEOP);
+}
+
+void
+save_freepv(pv)
+char *pv;
+{
+ SSCHECK(2);
+ SSPUSHPTR(pv);
+ SSPUSHINT(SAVEt_FREEPV);
+}
+
+void
+save_clearsv(svp)
+SV** svp;
+{
+ SSCHECK(2);
+ SSPUSHLONG((long)(svp-curpad));
+ SSPUSHINT(SAVEt_CLEARSV);
+}
+
+void
+save_delete(hv,key,klen)
+HV *hv;
+char *key;
+I32 klen;
+{
+ SSCHECK(4);
+ SSPUSHINT(klen);
+ SSPUSHPTR(key);
+ SSPUSHPTR(hv);
+ SSPUSHINT(SAVEt_DELETE);
+}
+
+void
save_list(sarg,maxsarg)
register SV **sarg;
I32 maxsarg;
}
void
+save_destructor(f,p)
+void (*f) _((void*));
+void* p;
+{
+ SSCHECK(3);
+ SSPUSHDPTR(f);
+ SSPUSHPTR(p);
+ SSPUSHINT(SAVEt_DESTRUCTOR);
+}
+
+void
leave_scope(base)
I32 base;
{
register void* ptr;
if (base < -1)
- fatal("panic: corrupt saved stack index");
+ croak("panic: corrupt saved stack index");
while (savestack_ix > base) {
switch (SSPOPINT) {
case SAVEt_ITEM: /* normal string */
value = (SV*)SSPOPPTR;
sv = (SV*)SSPOPPTR;
sv_replace(sv,value);
+ localizing = 2;
SvSETMAGIC(sv);
+ localizing = 0;
break;
case SAVEt_SV: /* scalar reference */
value = (SV*)SSPOPPTR;
gv = (GV*)SSPOPPTR;
sv = GvSV(gv);
- if (SvTYPE(sv) >= SVt_PVMG)
+ if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
+ SvTYPE(sv) != SVt_PVGV)
+ {
+ (void)SvUPGRADE(value, SvTYPE(sv));
+ SvMAGIC(value) = SvMAGIC(sv);
+ SvFLAGS(value) |= SvMAGICAL(sv);
+ SvMAGICAL_off(sv);
SvMAGIC(sv) = 0;
- sv_free(sv);
- GvSV(gv) = sv = value;
- SvSETMAGIC(sv);
+ }
+ SvREFCNT_dec(sv);
+ GvSV(gv) = value;
+ localizing = 2;
+ SvSETMAGIC(value);
+ localizing = 0;
break;
case SAVEt_SVREF: /* scalar reference */
ptr = SSPOPPTR;
sv = *(SV**)ptr;
- if (SvTYPE(sv) >= SVt_PVMG)
+ value = (SV*)SSPOPPTR;
+ if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
+ SvTYPE(sv) != SVt_PVGV)
+ {
+ (void)SvUPGRADE(value, SvTYPE(sv));
+ SvMAGIC(value) = SvMAGIC(sv);
+ SvFLAGS(value) |= SvMAGICAL(sv);
+ SvMAGICAL_off(sv);
SvMAGIC(sv) = 0;
- sv_free(sv);
- *(SV**)ptr = sv = (SV*)SSPOPPTR;
- SvSETMAGIC(sv);
+ }
+ SvREFCNT_dec(sv);
+ *(SV**)ptr = value;
+ localizing = 2;
+ SvSETMAGIC(value);
+ localizing = 0;
break;
case SAVEt_AV: /* array reference */
av = (AV*)SSPOPPTR;
gv = (GV*)SSPOPPTR;
- av_free(GvAV(gv));
+ SvREFCNT_dec(GvAV(gv));
GvAV(gv) = av;
break;
case SAVEt_HV: /* hash reference */
hv = (HV*)SSPOPPTR;
gv = (GV*)SSPOPPTR;
- (void)hv_free(GvHV(gv), FALSE);
+ SvREFCNT_dec(GvHV(gv));
GvHV(gv) = hv;
break;
case SAVEt_INT: /* int reference */
ptr = SSPOPPTR;
*(int*)ptr = (int)SSPOPINT;
break;
+ case SAVEt_LONG: /* long reference */
+ ptr = SSPOPPTR;
+ *(long*)ptr = (long)SSPOPLONG;
+ break;
case SAVEt_I32: /* I32 reference */
ptr = SSPOPPTR;
*(I32*)ptr = (I32)SSPOPINT;
break;
+ case SAVEt_IV: /* IV reference */
+ ptr = SSPOPPTR;
+ *(IV*)ptr = (IV)SSPOPIV;
+ break;
case SAVEt_SPTR: /* SV* reference */
ptr = SSPOPPTR;
*(SV**)ptr = (SV*)SSPOPPTR;
break;
+ case SAVEt_PPTR: /* char* reference */
+ ptr = SSPOPPTR;
+ *(char**)ptr = (char*)SSPOPPTR;
+ break;
case SAVEt_HPTR: /* HV* reference */
ptr = SSPOPPTR;
*(HV**)ptr = (HV*)SSPOPPTR;
gv = (GV*)SSPOPPTR;
gp_free(gv);
GvGP(gv) = (GP*)ptr;
+ SvREFCNT_dec(gv);
break;
+ case SAVEt_FREESV:
+ ptr = SSPOPPTR;
+ SvREFCNT_dec((SV*)ptr);
+ break;
+ case SAVEt_FREEOP:
+ ptr = SSPOPPTR;
+ curpad = AvARRAY(comppad);
+ op_free((OP*)ptr);
+ break;
+ case SAVEt_FREEPV:
+ ptr = SSPOPPTR;
+ Safefree((char*)ptr);
+ break;
+ case SAVEt_CLEARSV:
+ ptr = (void*)&curpad[SSPOPLONG];
+ sv = *(SV**)ptr;
+ if (SvREFCNT(sv) <= 1) { /* Can clear pad variable in place. */
+ if (SvTHINKFIRST(sv)) {
+ if (SvREADONLY(sv))
+ croak("panic: leave_scope clearsv");
+ if (SvROK(sv))
+ sv_unref(sv);
+ }
+ if (SvMAGICAL(sv))
+ mg_free(sv);
+
+ switch (SvTYPE(sv)) {
+ case SVt_NULL:
+ break;
+ case SVt_PVAV:
+ av_clear((AV*)sv);
+ break;
+ case SVt_PVHV:
+ hv_clear((HV*)sv);
+ break;
+ case SVt_PVCV:
+ sub_generation++;
+ cv_undef((CV*)sv);
+ break;
+ default:
+ if (SvPOK(sv) && SvLEN(sv))
+ (void)SvOOK_off(sv);
+ (void)SvOK_off(sv);
+ break;
+ }
+ }
+ else { /* Someone has a claim on this, so abandon it. */
+ U32 padflags = SvFLAGS(sv) & (SVs_PADBUSY|SVs_PADMY|SVs_PADTMP);
+ SvREFCNT_dec(sv); /* Cast current value to the winds. */
+ switch (SvTYPE(sv)) { /* Console ourselves with a new value */
+ case SVt_PVAV: *(SV**)ptr = (SV*)newAV(); break;
+ case SVt_PVHV: *(SV**)ptr = (SV*)newHV(); break;
+ default: *(SV**)ptr = NEWSV(0,0); break;
+ }
+ SvFLAGS(*(SV**)ptr) |= padflags; /* preserve pad nature */
+ }
+ break;
+ case SAVEt_DELETE:
+ ptr = SSPOPPTR;
+ hv = (HV*)ptr;
+ ptr = SSPOPPTR;
+ (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
+ Safefree(ptr);
+ break;
+ case SAVEt_DESTRUCTOR:
+ ptr = SSPOPPTR;
+ (*SSPOPDPTR)(ptr);
+ break;
+ case SAVEt_REGCONTEXT:
+ {
+ I32 delta = SSPOPINT;
+ savestack_ix -= delta; /* regexp must have croaked */
+ }
+ break;
default:
- fatal("panic: leave_scope inconsistency");
+ croak("panic: leave_scope inconsistency");
}
}
}
+
+#ifdef DEBUGGING
+void
+cx_dump(cx)
+CONTEXT* cx;
+{
+ fprintf(stderr, "CX %d = %s\n", cx - cxstack, block_type[cx->cx_type]);
+ if (cx->cx_type != CXt_SUBST) {
+ fprintf(stderr, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
+ fprintf(stderr, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
+ fprintf(stderr, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
+ fprintf(stderr, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
+ fprintf(stderr, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
+ fprintf(stderr, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
+ fprintf(stderr, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
+ }
+ switch (cx->cx_type) {
+ case CXt_NULL:
+ case CXt_BLOCK:
+ break;
+ case CXt_SUB:
+ fprintf(stderr, "BLK_SUB.CV = 0x%lx\n",
+ (long)cx->blk_sub.cv);
+ fprintf(stderr, "BLK_SUB.GV = 0x%lx\n",
+ (long)cx->blk_sub.gv);
+ fprintf(stderr, "BLK_SUB.DFOUTGV = 0x%lx\n",
+ (long)cx->blk_sub.dfoutgv);
+ fprintf(stderr, "BLK_SUB.OLDDEPTH = %ld\n",
+ (long)cx->blk_sub.olddepth);
+ fprintf(stderr, "BLK_SUB.HASARGS = %d\n",
+ (int)cx->blk_sub.hasargs);
+ break;
+ case CXt_EVAL:
+ fprintf(stderr, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
+ (long)cx->blk_eval.old_in_eval);
+ fprintf(stderr, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
+ op_name[cx->blk_eval.old_op_type],
+ op_desc[cx->blk_eval.old_op_type]);
+ fprintf(stderr, "BLK_EVAL.OLD_NAME = %s\n",
+ cx->blk_eval.old_name);
+ fprintf(stderr, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
+ (long)cx->blk_eval.old_eval_root);
+ break;
+
+ case CXt_LOOP:
+ fprintf(stderr, "BLK_LOOP.LABEL = %s\n",
+ cx->blk_loop.label);
+ fprintf(stderr, "BLK_LOOP.RESETSP = %ld\n",
+ (long)cx->blk_loop.resetsp);
+ fprintf(stderr, "BLK_LOOP.REDO_OP = 0x%lx\n",
+ (long)cx->blk_loop.redo_op);
+ fprintf(stderr, "BLK_LOOP.NEXT_OP = 0x%lx\n",
+ (long)cx->blk_loop.next_op);
+ fprintf(stderr, "BLK_LOOP.LAST_OP = 0x%lx\n",
+ (long)cx->blk_loop.last_op);
+ fprintf(stderr, "BLK_LOOP.ITERIX = %ld\n",
+ (long)cx->blk_loop.iterix);
+ fprintf(stderr, "BLK_LOOP.ITERARY = 0x%lx\n",
+ (long)cx->blk_loop.iterary);
+ fprintf(stderr, "BLK_LOOP.ITERVAR = 0x%lx\n",
+ (long)cx->blk_loop.itervar);
+ if (cx->blk_loop.itervar)
+ fprintf(stderr, "BLK_LOOP.ITERSAVE = 0x%lx\n",
+ (long)cx->blk_loop.itersave);
+ break;
+
+ case CXt_SUBST:
+ fprintf(stderr, "SB_ITERS = %ld\n",
+ (long)cx->sb_iters);
+ fprintf(stderr, "SB_MAXITERS = %ld\n",
+ (long)cx->sb_maxiters);
+ fprintf(stderr, "SB_SAFEBASE = %ld\n",
+ (long)cx->sb_safebase);
+ fprintf(stderr, "SB_ONCE = %ld\n",
+ (long)cx->sb_once);
+ fprintf(stderr, "SB_ORIG = %s\n",
+ cx->sb_orig);
+ fprintf(stderr, "SB_DSTR = 0x%lx\n",
+ (long)cx->sb_dstr);
+ fprintf(stderr, "SB_TARG = 0x%lx\n",
+ (long)cx->sb_targ);
+ fprintf(stderr, "SB_S = 0x%lx\n",
+ (long)cx->sb_s);
+ fprintf(stderr, "SB_M = 0x%lx\n",
+ (long)cx->sb_m);
+ fprintf(stderr, "SB_STREND = 0x%lx\n",
+ (long)cx->sb_strend);
+ fprintf(stderr, "SB_SUBBASE = 0x%lx\n",
+ (long)cx->sb_subbase);
+ break;
+ }
+}
+#endif
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