[perl5.git] / scope.c

/*    scope.c
 *
 *    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.
 *
 */

/*
 * "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);
#ifdef NOTDEF
    stack_sp = AvARRAY(stack) + (sp - stack_base);
    stack_base = AvARRAY(stack);
    stack_max = stack_base + AvMAX(stack) - 1;
#endif
    return stack_sp;
}

I32
cxinc()
{
    cxstack_max = cxstack_max * 3 / 2;
    Renew(cxstack, cxstack_max, CONTEXT);
    return cxstack_ix + 1;
}

void
push_return(retop)
OP *retop;
{
    if (retstack_ix == retstack_max) {
	retstack_max = retstack_max * 3 / 2;
	Renew(retstack, retstack_max, OP*);
    }
    retstack[retstack_ix++] = retop;
}

OP *
pop_return()
{
    if (retstack_ix > 0)
	return retstack[--retstack_ix];
    else
	return Nullop;
}

void
push_scope()
{
    if (scopestack_ix == scopestack_max) {
	scopestack_max = scopestack_max * 3 / 2;
	Renew(scopestack, scopestack_max, I32);
    }
    scopestack[scopestack_ix++] = savestack_ix;

}

void
pop_scope()
{
    I32 oldsave = scopestack[--scopestack_ix];
    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
savestack_grow()
{
    savestack_max = savestack_max * 3 / 2;
    Renew(savestack, savestack_max, ANY);
}

void
free_tmps()
{
    /* XXX should tmps_floor live in cxstack? */
    I32 myfloor = tmps_floor;
    while (tmps_ix > myfloor) {      /* clean up after last statement */
	SV* sv = tmps_stack[tmps_ix];
	tmps_stack[tmps_ix--] = Nullsv;
	if (sv) {
#ifdef DEBUGGING
	    SvTEMP_off(sv);
#endif
	    SvREFCNT_dec(sv);		/* note, can modify tmps_ix!!! */
	}
    }
}

SV *
save_scalar(gv)
GV *gv;
{
    register SV *sv;
    SV *osv = GvSV(gv);

    SSCHECK(3);
    SSPUSHPTR(gv);
    SSPUSHPTR(osv);
    SSPUSHINT(SAVEt_SV);

    sv = GvSV(gv) = NEWSV(0,0);
    if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
	sv_upgrade(sv, SvTYPE(osv));
	if (SvGMAGICAL(osv)) {
	    mg_get(osv);
	    SvFLAGS(osv) |= (SvFLAGS(osv) &
		(SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
	}
	SvMAGIC(sv) = SvMAGIC(osv);
	SvFLAGS(sv) |= SvMAGICAL(osv);
	localizing = TRUE;
	SvSETMAGIC(sv);
	localizing = FALSE;
    }
    return sv;
}

#ifdef INLINED_ELSEWHERE
void
save_gp(gv)
GV *gv;
{
    register GP *gp;
    GP *ogp = GvGP(gv);

    SSCHECK(3);
    SSPUSHPTR(gv);
    SSPUSHPTR(ogp);
    SSPUSHINT(SAVEt_GP);

    Newz(602,gp, 1, GP);
    GvGP(gv) = gp;
    GvREFCNT(gv) = 1;
    GvSV(gv) = NEWSV(72,0);
    GvLINE(gv) = curcop->cop_line;
    GvEGV(gv) = gv;
}
#endif

SV*
save_svref(sptr)
SV **sptr;
{
    register SV *sv;
    SV *osv = *sptr;

    SSCHECK(3);
    SSPUSHPTR(*sptr);
    SSPUSHPTR(sptr);
    SSPUSHINT(SAVEt_SVREF);

    sv = *sptr = NEWSV(0,0);
    if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
	sv_upgrade(sv, SvTYPE(osv));
	if (SvGMAGICAL(osv)) {
	    mg_get(osv);
	    SvFLAGS(osv) |= (SvFLAGS(osv) &
		(SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
	}
	SvMAGIC(sv) = SvMAGIC(osv);
	SvFLAGS(sv) |= SvMAGICAL(osv);
	localizing = TRUE;
	SvSETMAGIC(sv);
	localizing = FALSE;
    }
    return sv;
}

AV *
save_ary(gv)
GV *gv;
{
    SSCHECK(3);
    SSPUSHPTR(gv);
    SSPUSHPTR(GvAVn(gv));
    SSPUSHINT(SAVEt_AV);

    GvAV(gv) = Null(AV*);
    return GvAVn(gv);
}

HV *
save_hash(gv)
GV *gv;
{
    SSCHECK(3);
    SSPUSHPTR(gv);
    SSPUSHPTR(GvHVn(gv));
    SSPUSHINT(SAVEt_HV);

    GvHV(gv) = Null(HV*);
    return GvHVn(gv);
}

void
save_item(item)
register SV *item;
{
    register SV *sv;

    SSCHECK(3);
    SSPUSHPTR(item);		/* remember the pointer */
    sv = NEWSV(0,0);
    sv_setsv(sv,item);
    SSPUSHPTR(sv);		/* remember the value */
    SSPUSHINT(SAVEt_ITEM);
}

void
save_int(intp)
int *intp;
{
    SSCHECK(3);
    SSPUSHINT(*intp);
    SSPUSHPTR(intp);
    SSPUSHINT(SAVEt_INT);
}

void
save_long(longp)
long *longp;
{
    SSCHECK(3);
    SSPUSHLONG(*longp);
    SSPUSHPTR(longp);
    SSPUSHINT(SAVEt_LONG);
}

void
save_I32(intp)
I32 *intp;
{
    SSCHECK(3);
    SSPUSHINT(*intp);
    SSPUSHPTR(intp);
    SSPUSHINT(SAVEt_I32);
}

void
save_iv(ivp)
IV *ivp;
{
    SSCHECK(3);
    SSPUSHINT(*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;
{
    SSCHECK(3);
    SSPUSHPTR(*sptr);
    SSPUSHPTR(sptr);
    SSPUSHINT(SAVEt_SPTR);
}

void
save_nogv(gv)
GV *gv;
{
    SSCHECK(2);
    SSPUSHPTR(gv);
    SSPUSHINT(SAVEt_NSTAB);
}

void
save_hptr(hptr)
HV **hptr;
{
    SSCHECK(3);
    SSPUSHPTR(*hptr);
    SSPUSHPTR(hptr);
    SSPUSHINT(SAVEt_HPTR);
}

void
save_aptr(aptr)
AV **aptr;
{
    SSCHECK(3);
    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);
    SSPUSHPTR(svp);
    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;
{
    register SV *sv;
    register I32 i;

    SSCHECK(3 * maxsarg);
    for (i = 1; i <= maxsarg; i++) {
	SSPUSHPTR(sarg[i]);		/* remember the pointer */
	sv = NEWSV(0,0);
	sv_setsv(sv,sarg[i]);
	SSPUSHPTR(sv);			/* remember the value */
	SSPUSHINT(SAVEt_ITEM);
    }
}

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 SV *sv;
    register SV *value;
    register GV *gv;
    register AV *av;
    register HV *hv;
    register void* ptr;

    if (base < -1)
	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 = TRUE;
	    SvSETMAGIC(sv);
	    localizing = FALSE;
	    break;
        case SAVEt_SV:				/* scalar reference */
	    value = (SV*)SSPOPPTR;
	    gv = (GV*)SSPOPPTR;
	    sv = GvSV(gv);
	    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;
	    }
            SvREFCNT_dec(sv);
            GvSV(gv) = value;
	    localizing = TRUE;
	    SvSETMAGIC(value);
	    localizing = FALSE;
            break;
        case SAVEt_SVREF:			/* scalar reference */
	    ptr = SSPOPPTR;
	    sv = *(SV**)ptr;
	    value = (SV*)SSPOPPTR;
	    if (SvTYPE(sv) >= SVt_PVMG && SvTYPE(sv) != SVt_PVGV) {
		(void)SvUPGRADE(value, SvTYPE(sv));
		SvMAGIC(value) = SvMAGIC(sv);
		SvFLAGS(value) |= SvMAGICAL(sv);
		SvMAGICAL_off(sv);
		SvMAGIC(sv) = 0;
	    }
            SvREFCNT_dec(sv);
	    *(SV**)ptr = value;
	    localizing = TRUE;
	    SvSETMAGIC(value);
	    localizing = FALSE;
            break;
        case SAVEt_AV:				/* array reference */
	    av = (AV*)SSPOPPTR;
	    gv = (GV*)SSPOPPTR;
            SvREFCNT_dec(GvAV(gv));
            GvAV(gv) = av;
            break;
        case SAVEt_HV:				/* hash reference */
	    hv = (HV*)SSPOPPTR;
	    gv = (GV*)SSPOPPTR;
            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;
	    break;
	case SAVEt_APTR:			/* AV* reference */
	    ptr = SSPOPPTR;
	    *(AV**)ptr = (AV*)SSPOPPTR;
	    break;
	case SAVEt_NSTAB:
	    gv = (GV*)SSPOPPTR;
	    (void)sv_clear(gv);
	    break;
        case SAVEt_GP:				/* scalar reference */
	    ptr = SSPOPPTR;
	    gv = (GV*)SSPOPPTR;
            gp_free(gv);
            GvGP(gv) = (GP*)ptr;
            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 = SSPOPPTR;
	    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. */
		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;
		}
	    }
	    break;
	case SAVEt_DELETE:
	    ptr = SSPOPPTR;
	    hv = (HV*)ptr;
	    ptr = SSPOPPTR;
	    hv_delete(hv, (char*)ptr, (U32)SSPOPINT);
	    Safefree(ptr);
	    break;
	case SAVEt_DESTRUCTOR:
	    ptr = SSPOPPTR;
	    (*SSPOPDPTR)(ptr);
	    break;
	case SAVEt_REGCONTEXT:
	    savestack_ix -= SSPOPINT;	/* regexp must have croaked */
	    break;
	default:
	    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\n",
		op_name[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
Commit	Line	Data
a0d0e21e	1	/* scope.c
79072805	2	*
a0d0e21e	3	* Copyright (c) 1991-1994, Larry Wall
79072805 LW	4	*
	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.
	7	*
a0d0e21e LW	8	*/
	9
	10	/*
	11	* "For the fashion of Minas Tirith was such that it was built on seven
	12	* levels..."
79072805 LW	13	*/
	14
	15	#include "EXTERN.h"
	16	#include "perl.h"
	17
a0d0e21e LW	18	SV**
	19	stack_grow(sp, p, n)
	20	SV** sp;
	21	SV** p;
	22	int n;
	23	{
	24	stack_sp = sp;
	25	av_extend(stack, (p - stack_base) + (n) + 128);
	26	#ifdef NOTDEF
	27	stack_sp = AvARRAY(stack) + (sp - stack_base);
	28	stack_base = AvARRAY(stack);
	29	stack_max = stack_base + AvMAX(stack) - 1;
	30	#endif
	31	return stack_sp;
	32	}
	33
79072805 LW	34	I32
	35	cxinc()
	36	{
	37	cxstack_max = cxstack_max * 3 / 2;
	38	Renew(cxstack, cxstack_max, CONTEXT);
	39	return cxstack_ix + 1;
	40	}
	41
	42	void
	43	push_return(retop)
	44	OP *retop;
	45	{
	46	if (retstack_ix == retstack_max) {
	47	retstack_max = retstack_max * 3 / 2;
	48	Renew(retstack, retstack_max, OP*);
	49	}
	50	retstack[retstack_ix++] = retop;
	51	}
	52
	53	OP *
	54	pop_return()
	55	{
	56	if (retstack_ix > 0)
	57	return retstack[--retstack_ix];
	58	else
	59	return Nullop;
	60	}
	61
	62	void
	63	push_scope()
	64	{
	65	if (scopestack_ix == scopestack_max) {
	66	scopestack_max = scopestack_max * 3 / 2;
	67	Renew(scopestack, scopestack_max, I32);
	68	}
	69	scopestack[scopestack_ix++] = savestack_ix;
	70
	71	}
	72
	73	void
	74	pop_scope()
	75	{
	76	I32 oldsave = scopestack[--scopestack_ix];
8990e307	77	LEAVE_SCOPE(oldsave);
79072805 LW	78	}
	79
	80	void
a0d0e21e LW	81	markstack_grow()
	82	{
	83	I32 oldmax = markstack_max - markstack;
	84	I32 newmax = oldmax * 3 / 2;
	85
	86	Renew(markstack, newmax, I32);
	87	markstack_ptr = markstack + oldmax;
	88	markstack_max = markstack + newmax;
	89	}
	90
	91	void
79072805 LW	92	savestack_grow()
	93	{
	94	savestack_max = savestack_max * 3 / 2;
	95	Renew(savestack, savestack_max, ANY);
	96	}
	97
	98	void
	99	free_tmps()
	100	{
	101	/* XXX should tmps_floor live in cxstack? */
	102	I32 myfloor = tmps_floor;
	103	while (tmps_ix > myfloor) { /* clean up after last statement */
	104	SV* sv = tmps_stack[tmps_ix];
	105	tmps_stack[tmps_ix--] = Nullsv;
463ee0b2 LW	106	if (sv) {
	107	#ifdef DEBUGGING
	108	SvTEMP_off(sv);
	109	#endif
8990e307	110	SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
463ee0b2	111	}
79072805 LW	112	}
	113	}
	114
	115	SV *
	116	save_scalar(gv)
	117	GV *gv;
	118	{
	119	register SV *sv;
	120	SV *osv = GvSV(gv);
	121
	122	SSCHECK(3);
	123	SSPUSHPTR(gv);
	124	SSPUSHPTR(osv);
	125	SSPUSHINT(SAVEt_SV);
	126
	127	sv = GvSV(gv) = NEWSV(0,0);
a0d0e21e	128	if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
79072805	129	sv_upgrade(sv, SvTYPE(osv));
a0d0e21e LW	130	if (SvGMAGICAL(osv)) {
	131	mg_get(osv);
	132	SvFLAGS(osv) \|= (SvFLAGS(osv) &
	133	(SVp_IOK\|SVp_NOK\|SVp_POK)) >> PRIVSHIFT;
	134	}
79072805	135	SvMAGIC(sv) = SvMAGIC(osv);
a0d0e21e	136	SvFLAGS(sv) \|= SvMAGICAL(osv);
79072805 LW	137	localizing = TRUE;
	138	SvSETMAGIC(sv);
	139	localizing = FALSE;
	140	}
	141	return sv;
	142	}
	143
	144	#ifdef INLINED_ELSEWHERE
	145	void
	146	save_gp(gv)
	147	GV *gv;
	148	{
	149	register GP *gp;
	150	GP *ogp = GvGP(gv);
	151
	152	SSCHECK(3);
	153	SSPUSHPTR(gv);
	154	SSPUSHPTR(ogp);
	155	SSPUSHINT(SAVEt_GP);
	156
	157	Newz(602,gp, 1, GP);
	158	GvGP(gv) = gp;
	159	GvREFCNT(gv) = 1;
	160	GvSV(gv) = NEWSV(72,0);
	161	GvLINE(gv) = curcop->cop_line;
	162	GvEGV(gv) = gv;
	163	}
	164	#endif
	165
	166	SV*
	167	save_svref(sptr)
	168	SV **sptr;
	169	{
	170	register SV *sv;
	171	SV osv = sptr;
	172
	173	SSCHECK(3);
	174	SSPUSHPTR(*sptr);
	175	SSPUSHPTR(sptr);
	176	SSPUSHINT(SAVEt_SVREF);
	177
	178	sv = *sptr = NEWSV(0,0);
a0d0e21e	179	if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
79072805	180	sv_upgrade(sv, SvTYPE(osv));
a0d0e21e LW	181	if (SvGMAGICAL(osv)) {
	182	mg_get(osv);
	183	SvFLAGS(osv) \|= (SvFLAGS(osv) &
	184	(SVp_IOK\|SVp_NOK\|SVp_POK)) >> PRIVSHIFT;
	185	}
79072805	186	SvMAGIC(sv) = SvMAGIC(osv);
a0d0e21e	187	SvFLAGS(sv) \|= SvMAGICAL(osv);
79072805 LW	188	localizing = TRUE;
	189	SvSETMAGIC(sv);
	190	localizing = FALSE;
	191	}
	192	return sv;
	193	}
	194
	195	AV *
	196	save_ary(gv)
	197	GV *gv;
	198	{
	199	SSCHECK(3);
	200	SSPUSHPTR(gv);
	201	SSPUSHPTR(GvAVn(gv));
	202	SSPUSHINT(SAVEt_AV);
	203
	204	GvAV(gv) = Null(AV*);
	205	return GvAVn(gv);
	206	}
	207
	208	HV *
	209	save_hash(gv)
	210	GV *gv;
	211	{
	212	SSCHECK(3);
	213	SSPUSHPTR(gv);
	214	SSPUSHPTR(GvHVn(gv));
	215	SSPUSHINT(SAVEt_HV);
	216
	217	GvHV(gv) = Null(HV*);
	218	return GvHVn(gv);
	219	}
	220
	221	void
	222	save_item(item)
	223	register SV *item;
	224	{
	225	register SV *sv;
	226
	227	SSCHECK(3);
	228	SSPUSHPTR(item); /* remember the pointer */
	229	sv = NEWSV(0,0);
	230	sv_setsv(sv,item);
	231	SSPUSHPTR(sv); /* remember the value */
	232	SSPUSHINT(SAVEt_ITEM);
	233	}
	234
	235	void
	236	save_int(intp)
	237	int *intp;
	238	{
	239	SSCHECK(3);
	240	SSPUSHINT(*intp);
	241	SSPUSHPTR(intp);
	242	SSPUSHINT(SAVEt_INT);
	243	}
	244
	245	void
85e6fe83 LW	246	save_long(longp)
	247	long *longp;
	248	{
	249	SSCHECK(3);
	250	SSPUSHLONG(*longp);
	251	SSPUSHPTR(longp);
	252	SSPUSHINT(SAVEt_LONG);
	253	}
	254
	255	void
79072805 LW	256	save_I32(intp)
	257	I32 *intp;
	258	{
	259	SSCHECK(3);
	260	SSPUSHINT(*intp);
	261	SSPUSHPTR(intp);
	262	SSPUSHINT(SAVEt_I32);
	263	}
	264
a0d0e21e LW	265	void
	266	save_iv(ivp)
	267	IV *ivp;
	268	{
	269	SSCHECK(3);
	270	SSPUSHINT(*ivp);
	271	SSPUSHPTR(ivp);
	272	SSPUSHINT(SAVEt_IV);
	273	}
	274
85e6fe83 LW	275	/* Cannot use save_sptr() to store a char* since the SV** cast will
	276	* force word-alignment and we'll miss the pointer.
	277	*/
	278	void
	279	save_pptr(pptr)
	280	char **pptr;
	281	{
	282	SSCHECK(3);
	283	SSPUSHPTR(*pptr);
	284	SSPUSHPTR(pptr);
	285	SSPUSHINT(SAVEt_PPTR);
	286	}
	287
79072805 LW	288	void
	289	save_sptr(sptr)
	290	SV **sptr;
	291	{
	292	SSCHECK(3);
	293	SSPUSHPTR(*sptr);
	294	SSPUSHPTR(sptr);
	295	SSPUSHINT(SAVEt_SPTR);
	296	}
	297
	298	void
	299	save_nogv(gv)
	300	GV *gv;
	301	{
	302	SSCHECK(2);
	303	SSPUSHPTR(gv);
	304	SSPUSHINT(SAVEt_NSTAB);
	305	}
	306
	307	void
	308	save_hptr(hptr)
	309	HV **hptr;
	310	{
	311	SSCHECK(3);
85e6fe83	312	SSPUSHPTR(*hptr);
79072805 LW	313	SSPUSHPTR(hptr);
	314	SSPUSHINT(SAVEt_HPTR);
	315	}
	316
	317	void
	318	save_aptr(aptr)
	319	AV **aptr;
	320	{
	321	SSCHECK(3);
85e6fe83	322	SSPUSHPTR(*aptr);
79072805 LW	323	SSPUSHPTR(aptr);
	324	SSPUSHINT(SAVEt_APTR);
	325	}
	326
	327	void
8990e307 LW	328	save_freesv(sv)
	329	SV *sv;
	330	{
	331	SSCHECK(2);
	332	SSPUSHPTR(sv);
	333	SSPUSHINT(SAVEt_FREESV);
	334	}
	335
	336	void
	337	save_freeop(op)
	338	OP *op;
	339	{
	340	SSCHECK(2);
	341	SSPUSHPTR(op);
	342	SSPUSHINT(SAVEt_FREEOP);
	343	}
	344
	345	void
	346	save_freepv(pv)
	347	char *pv;
	348	{
	349	SSCHECK(2);
	350	SSPUSHPTR(pv);
	351	SSPUSHINT(SAVEt_FREEPV);
	352	}
	353
	354	void
	355	save_clearsv(svp)
	356	SV** svp;
	357	{
	358	SSCHECK(2);
	359	SSPUSHPTR(svp);
	360	SSPUSHINT(SAVEt_CLEARSV);
	361	}
	362
	363	void
	364	save_delete(hv,key,klen)
	365	HV *hv;
	366	char *key;
	367	I32 klen;
	368	{
	369	SSCHECK(4);
	370	SSPUSHINT(klen);
	371	SSPUSHPTR(key);
	372	SSPUSHPTR(hv);
	373	SSPUSHINT(SAVEt_DELETE);
	374	}
	375
	376	void
79072805 LW	377	save_list(sarg,maxsarg)
	378	register SV **sarg;
	379	I32 maxsarg;
	380	{
	381	register SV *sv;
	382	register I32 i;
	383
	384	SSCHECK(3 * maxsarg);
	385	for (i = 1; i <= maxsarg; i++) {
	386	SSPUSHPTR(sarg[i]); /* remember the pointer */
	387	sv = NEWSV(0,0);
	388	sv_setsv(sv,sarg[i]);
	389	SSPUSHPTR(sv); /* remember the value */
	390	SSPUSHINT(SAVEt_ITEM);
	391	}
	392	}
	393
	394	void
a0d0e21e LW	395	save_destructor(f,p)
	396	void (f) _((void));
	397	void* p;
	398	{
	399	SSCHECK(3);
	400	SSPUSHDPTR(f);
	401	SSPUSHPTR(p);
	402	SSPUSHINT(SAVEt_DESTRUCTOR);
	403	}
	404
	405	void
79072805 LW	406	leave_scope(base)
	407	I32 base;
	408	{
	409	register SV *sv;
	410	register SV *value;
	411	register GV *gv;
	412	register AV *av;
	413	register HV *hv;
	414	register void* ptr;
	415
	416	if (base < -1)
463ee0b2	417	croak("panic: corrupt saved stack index");
79072805 LW	418	while (savestack_ix > base) {
	419	switch (SSPOPINT) {
	420	case SAVEt_ITEM: /* normal string */
	421	value = (SV*)SSPOPPTR;
	422	sv = (SV*)SSPOPPTR;
	423	sv_replace(sv,value);
a0d0e21e	424	localizing = TRUE;
79072805	425	SvSETMAGIC(sv);
a0d0e21e	426	localizing = FALSE;
79072805 LW	427	break;
	428	case SAVEt_SV: /* scalar reference */
	429	value = (SV*)SSPOPPTR;
	430	gv = (GV*)SSPOPPTR;
	431	sv = GvSV(gv);
a0d0e21e LW	432	if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) && SvTYPE(sv) != SVt_PVGV){
a0d0e21e LW	433	(void)SvUPGRADE(value, SvTYPE(sv));
85e6fe83	434	SvMAGIC(value) = SvMAGIC(sv);
a0d0e21e LW	435	SvFLAGS(value) \|= SvMAGICAL(sv);
a0d0e21e LW	436	SvMAGICAL_off(sv);
79072805	437	SvMAGIC(sv) = 0;
85e6fe83	438	}
8990e307	439	SvREFCNT_dec(sv);
a0d0e21e LW	440	GvSV(gv) = value;
	441	localizing = TRUE;
	442	SvSETMAGIC(value);
	443	localizing = FALSE;
79072805 LW	444	break;
	445	case SAVEt_SVREF: /* scalar reference */
	446	ptr = SSPOPPTR;
	447	sv = (SV*)ptr;
a0d0e21e LW	448	value = (SV*)SSPOPPTR;
	449	if (SvTYPE(sv) >= SVt_PVMG && SvTYPE(sv) != SVt_PVGV) {
	450	(void)SvUPGRADE(value, SvTYPE(sv));
	451	SvMAGIC(value) = SvMAGIC(sv);
	452	SvFLAGS(value) \|= SvMAGICAL(sv);
	453	SvMAGICAL_off(sv);
79072805	454	SvMAGIC(sv) = 0;
a0d0e21e	455	}
8990e307	456	SvREFCNT_dec(sv);
a0d0e21e LW	457	(SV*)ptr = value;
	458	localizing = TRUE;
	459	SvSETMAGIC(value);
	460	localizing = FALSE;
79072805 LW	461	break;
	462	case SAVEt_AV: /* array reference */
	463	av = (AV*)SSPOPPTR;
	464	gv = (GV*)SSPOPPTR;
8990e307	465	SvREFCNT_dec(GvAV(gv));
79072805 LW	466	GvAV(gv) = av;
	467	break;
	468	case SAVEt_HV: /* hash reference */
	469	hv = (HV*)SSPOPPTR;
	470	gv = (GV*)SSPOPPTR;
8990e307	471	SvREFCNT_dec(GvHV(gv));
79072805 LW	472	GvHV(gv) = hv;
	473	break;
	474	case SAVEt_INT: /* int reference */
	475	ptr = SSPOPPTR;
	476	(int)ptr = (int)SSPOPINT;
	477	break;
85e6fe83 LW	478	case SAVEt_LONG: /* long reference */
	479	ptr = SSPOPPTR;
	480	(long)ptr = (long)SSPOPLONG;
	481	break;
79072805 LW	482	case SAVEt_I32: /* I32 reference */
	483	ptr = SSPOPPTR;
	484	(I32)ptr = (I32)SSPOPINT;
	485	break;
a0d0e21e LW	486	case SAVEt_IV: /* IV reference */
	487	ptr = SSPOPPTR;
	488	(IV)ptr = (IV)SSPOPIV;
	489	break;
79072805 LW	490	case SAVEt_SPTR: /* SV* reference */
	491	ptr = SSPOPPTR;
	492	(SV)ptr = (SV)SSPOPPTR;
	493	break;
85e6fe83 LW	494	case SAVEt_PPTR: /* char* reference */
	495	ptr = SSPOPPTR;
	496	(char)ptr = (char)SSPOPPTR;
	497	break;
79072805 LW	498	case SAVEt_HPTR: /* HV* reference */
	499	ptr = SSPOPPTR;
	500	(HV)ptr = (HV)SSPOPPTR;
	501	break;
	502	case SAVEt_APTR: /* AV* reference */
	503	ptr = SSPOPPTR;
	504	(AV)ptr = (AV)SSPOPPTR;
	505	break;
	506	case SAVEt_NSTAB:
	507	gv = (GV*)SSPOPPTR;
	508	(void)sv_clear(gv);
	509	break;
	510	case SAVEt_GP: /* scalar reference */
	511	ptr = SSPOPPTR;
	512	gv = (GV*)SSPOPPTR;
	513	gp_free(gv);
	514	GvGP(gv) = (GP*)ptr;
	515	break;
8990e307 LW	516	case SAVEt_FREESV:
	517	ptr = SSPOPPTR;
	518	SvREFCNT_dec((SV*)ptr);
	519	break;
	520	case SAVEt_FREEOP:
	521	ptr = SSPOPPTR;
	522	curpad = AvARRAY(comppad);
	523	op_free((OP*)ptr);
	524	break;
	525	case SAVEt_FREEPV:
	526	ptr = SSPOPPTR;
	527	Safefree((char*)ptr);
	528	break;
	529	case SAVEt_CLEARSV:
	530	ptr = SSPOPPTR;
	531	sv = (SV*)ptr;
a0d0e21e	532	if (SvREFCNT(sv) <= 1) { /* Can clear pad variable in place. */
8990e307 LW	533	if (SvTHINKFIRST(sv)) {
	534	if (SvREADONLY(sv))
	535	croak("panic: leave_scope clearsv");
	536	if (SvROK(sv))
	537	sv_unref(sv);
	538	}
a0d0e21e LW	539	if (SvMAGICAL(sv))
a0d0e21e LW	540	mg_free(sv);
8990e307 LW	541
	542	switch (SvTYPE(sv)) {
	543	case SVt_NULL:
	544	break;
	545	case SVt_PVAV:
	546	av_clear((AV*)sv);
	547	break;
	548	case SVt_PVHV:
	549	hv_clear((HV*)sv);
	550	break;
	551	case SVt_PVCV:
	552	sub_generation++;
85e6fe83	553	cv_undef((CV*)sv);
8990e307 LW	554	break;
	555	default:
	556	if (SvPOK(sv) && SvLEN(sv))
a0d0e21e LW	557	(void)SvOOK_off(sv);
a0d0e21e LW	558	(void)SvOK_off(sv);
8990e307 LW	559	break;
	560	}
	561	}
	562	else { /* Someone has a claim on this, so abandon it. */
	563	SvREFCNT_dec(sv); /* Cast current value to the winds. */
	564	switch (SvTYPE(sv)) { /* Console ourselves with a new value */
	565	case SVt_PVAV: (SV)ptr = (SV)newAV(); break;
	566	case SVt_PVHV: (SV)ptr = (SV)newHV(); break;
	567	default: (SV*)ptr = NEWSV(0,0); break;
	568	}
	569	}
	570	break;
	571	case SAVEt_DELETE:
	572	ptr = SSPOPPTR;
	573	hv = (HV*)ptr;
	574	ptr = SSPOPPTR;
	575	hv_delete(hv, (char*)ptr, (U32)SSPOPINT);
adbc6bb1	576	Safefree(ptr);
8990e307	577	break;
a0d0e21e LW	578	case SAVEt_DESTRUCTOR:
	579	ptr = SSPOPPTR;
	580	(*SSPOPDPTR)(ptr);
	581	break;
	582	case SAVEt_REGCONTEXT:
	583	savestack_ix -= SSPOPINT; /* regexp must have croaked */
	584	break;
79072805	585	default:
463ee0b2	586	croak("panic: leave_scope inconsistency");
79072805 LW	587	}
	588	}
	589	}
8990e307 LW	590
	591	#ifdef DEBUGGING
	592	void
	593	cx_dump(cx)
	594	CONTEXT* cx;
	595	{
	596	fprintf(stderr, "CX %d = %s\n", cx - cxstack, block_type[cx->cx_type]);
	597	if (cx->cx_type != CXt_SUBST) {
	598	fprintf(stderr, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
	599	fprintf(stderr, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
	600	fprintf(stderr, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
	601	fprintf(stderr, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
	602	fprintf(stderr, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
	603	fprintf(stderr, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
	604	fprintf(stderr, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
	605	}
	606	switch (cx->cx_type) {
	607	case CXt_NULL:
	608	case CXt_BLOCK:
	609	break;
	610	case CXt_SUB:
	611	fprintf(stderr, "BLK_SUB.CV = 0x%lx\n",
	612	(long)cx->blk_sub.cv);
	613	fprintf(stderr, "BLK_SUB.GV = 0x%lx\n",
	614	(long)cx->blk_sub.gv);
	615	fprintf(stderr, "BLK_SUB.DFOUTGV = 0x%lx\n",
	616	(long)cx->blk_sub.dfoutgv);
	617	fprintf(stderr, "BLK_SUB.OLDDEPTH = %ld\n",
	618	(long)cx->blk_sub.olddepth);
	619	fprintf(stderr, "BLK_SUB.HASARGS = %d\n",
	620	(int)cx->blk_sub.hasargs);
	621	break;
	622	case CXt_EVAL:
	623	fprintf(stderr, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
	624	(long)cx->blk_eval.old_in_eval);
	625	fprintf(stderr, "BLK_EVAL.OLD_OP_TYPE = %s\n",
	626	op_name[cx->blk_eval.old_op_type]);
	627	fprintf(stderr, "BLK_EVAL.OLD_NAME = %s\n",
	628	cx->blk_eval.old_name);
	629	fprintf(stderr, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
	630	(long)cx->blk_eval.old_eval_root);
	631	break;
	632
	633	case CXt_LOOP:
	634	fprintf(stderr, "BLK_LOOP.LABEL = %s\n",
	635	cx->blk_loop.label);
	636	fprintf(stderr, "BLK_LOOP.RESETSP = %ld\n",
	637	(long)cx->blk_loop.resetsp);
	638	fprintf(stderr, "BLK_LOOP.REDO_OP = 0x%lx\n",
	639	(long)cx->blk_loop.redo_op);
	640	fprintf(stderr, "BLK_LOOP.NEXT_OP = 0x%lx\n",
	641	(long)cx->blk_loop.next_op);
	642	fprintf(stderr, "BLK_LOOP.LAST_OP = 0x%lx\n",
	643	(long)cx->blk_loop.last_op);
	644	fprintf(stderr, "BLK_LOOP.ITERIX = %ld\n",
	645	(long)cx->blk_loop.iterix);
	646	fprintf(stderr, "BLK_LOOP.ITERARY = 0x%lx\n",
	647	(long)cx->blk_loop.iterary);
	648	fprintf(stderr, "BLK_LOOP.ITERVAR = 0x%lx\n",
	649	(long)cx->blk_loop.itervar);
	650	if (cx->blk_loop.itervar)
	651	fprintf(stderr, "BLK_LOOP.ITERSAVE = 0x%lx\n",
	652	(long)cx->blk_loop.itersave);
	653	break;
654
655	case CXt_SUBST:
656	fprintf(stderr, "SB_ITERS = %ld\n",
657	(long)cx->sb_iters);
658	fprintf(stderr, "SB_MAXITERS = %ld\n",
659	(long)cx->sb_maxiters);
660	fprintf(stderr, "SB_SAFEBASE = %ld\n",
661	(long)cx->sb_safebase);
662	fprintf(stderr, "SB_ONCE = %ld\n",
663	(long)cx->sb_once);
664	fprintf(stderr, "SB_ORIG = %s\n",
665	cx->sb_orig);
666	fprintf(stderr, "SB_DSTR = 0x%lx\n",
667	(long)cx->sb_dstr);
668	fprintf(stderr, "SB_TARG = 0x%lx\n",
669	(long)cx->sb_targ);
670	fprintf(stderr, "SB_S = 0x%lx\n",
671	(long)cx->sb_s);
672	fprintf(stderr, "SB_M = 0x%lx\n",
673	(long)cx->sb_m);
674	fprintf(stderr, "SB_STREND = 0x%lx\n",
675	(long)cx->sb_strend);
676	fprintf(stderr, "SB_SUBBASE = 0x%lx\n",
677	(long)cx->sb_subbase);
678	break;
679	}
680	}
681	#endif