/* pp.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- * 2000, 2001, 2002, 2003, by Larry Wall and others
+ * 2000, 2001, 2002, 2003, 2004, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
* and no knowing what you'll find around a corner. And Elves, sir!" --Samwise
*/
+/* This file contains general pp ("push/pop") functions that execute the
+ * opcodes that make up a perl program. A typical pp function expects to
+ * find its arguments on the stack, and usually pushes its results onto
+ * the stack, hence the 'pp' terminology. Each OP structure contains
+ * a pointer to the relevant pp_foo() function.
+ */
+
#include "EXTERN.h"
#define PERL_IN_PP_C
#include "perl.h"
/* If this is a 'my' scalar and flag is set then vivify
* NI-S 1999/05/07
*/
+ if (SvREADONLY(sv))
+ Perl_croak(aTHX_ PL_no_modify);
if (PL_op->op_private & OPpDEREF) {
char *name;
GV *gv;
}
if (SvTYPE(sv) < SVt_RV)
sv_upgrade(sv, SVt_RV);
+ if (SvPVX(sv)) {
+ SvOOK_off(sv); /* backoff */
+ if (SvLEN(sv))
+ Safefree(SvPVX(sv));
+ SvLEN(sv)=SvCUR(sv)=0;
+ }
SvRV(sv) = (SV*)gv;
SvROK_on(sv);
SvSETMAGIC(sv);
PL_op->op_private & HINT_STRICT_REFS)
DIE(aTHX_ PL_no_usym, "a symbol");
if (ckWARN(WARN_UNINITIALIZED))
- report_uninit();
+ report_uninit(sv);
RETSETUNDEF;
}
sym = SvPV(sv,len);
PL_op->op_private & HINT_STRICT_REFS)
DIE(aTHX_ PL_no_usym, "a SCALAR");
if (ckWARN(WARN_UNINITIALIZED))
- report_uninit();
+ report_uninit(sv);
RETSETUNDEF;
}
sym = SvPV(sv, len);
break;
default:
if (SvTYPE(sv) >= SVt_PV && SvPVX(sv) && SvLEN(sv)) {
- (void)SvOOK_off(sv);
+ SvOOK_off(sv);
Safefree(SvPVX(sv));
SvPV_set(sv, Nullch);
SvLEN_set(sv, 0);
}
- (void)SvOK_off(sv);
+ SvOK_off(sv);
SvSETMAGIC(sv);
}
{
dSP; dATARGET; tryAMAGICbin(repeat,opASSIGN);
{
- register IV count = POPi;
+ register IV count;
+ dPOPss;
+ if (SvGMAGICAL(sv))
+ mg_get(sv);
+ if (SvIOKp(sv)) {
+ if (SvUOK(sv)) {
+ UV uv = SvUV(sv);
+ if (uv > IV_MAX)
+ count = IV_MAX; /* The best we can do? */
+ else
+ count = uv;
+ } else {
+ IV iv = SvIV(sv);
+ if (iv < 0)
+ count = 0;
+ else
+ count = iv;
+ }
+ }
+ else if (SvNOKp(sv)) {
+ NV nv = SvNV(sv);
+ if (nv < 0.0)
+ count = 0;
+ else
+ count = (IV)nv;
+ }
+ else
+ count = SvIVx(sv);
if (GIMME == G_ARRAY && PL_op->op_private & OPpREPEAT_DOLIST) {
dMARK;
I32 items = SP - MARK;
I32 max;
+ static const char oom_list_extend[] =
+ "Out of memory during list extend";
max = items * count;
+ MEM_WRAP_CHECK_1(max, SV*, oom_list_extend);
+ /* Did the max computation overflow? */
+ if (items > 0 && max > 0 && (max < items || max < count))
+ Perl_croak(aTHX_ oom_list_extend);
MEXTEND(MARK, max);
if (count > 1) {
while (SP > MARK) {
SV *tmpstr = POPs;
STRLEN len;
bool isutf;
+ static const char oom_string_extend[] =
+ "Out of memory during string extend";
SvSetSV(TARG, tmpstr);
SvPV_force(TARG, len);
if (count < 1)
SvCUR_set(TARG, 0);
else {
+ IV max = count * len;
+ if (len > ((MEM_SIZE)~0)/count)
+ Perl_croak(aTHX_ oom_string_extend);
+ MEM_WRAP_CHECK_1(max, char, oom_string_extend);
SvGROW(TARG, (count * len) + 1);
repeatcpy(SvPVX(TARG) + len, SvPVX(TARG), len, count - 1);
SvCUR(TARG) *= count;
#ifdef PERL_PRESERVE_IVUV
else
#endif
- if (SvROK(TOPs) && SvROK(TOPm1s)) {
- SP--;
- SETs(boolSV(SvRV(TOPs) < SvRV(TOPp1s)));
- RETURN;
- }
+ if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
+ SP--;
+ SETs(boolSV(SvRV(TOPs) < SvRV(TOPp1s)));
+ RETURN;
+ }
#endif
{
dPOPnv;
#ifdef PERL_PRESERVE_IVUV
else
#endif
- if (SvROK(TOPs) && SvROK(TOPm1s)) {
+ if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
SP--;
SETs(boolSV(SvRV(TOPs) > SvRV(TOPp1s)));
RETURN;
#ifdef PERL_PRESERVE_IVUV
else
#endif
- if (SvROK(TOPs) && SvROK(TOPm1s)) {
+ if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
SP--;
SETs(boolSV(SvRV(TOPs) <= SvRV(TOPp1s)));
RETURN;
#ifdef PERL_PRESERVE_IVUV
else
#endif
- if (SvROK(TOPs) && SvROK(TOPm1s)) {
+ if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
SP--;
SETs(boolSV(SvRV(TOPs) >= SvRV(TOPp1s)));
RETURN;
{
dSP; tryAMAGICbinSET(ne,0);
#ifndef NV_PRESERVES_UV
- if (SvROK(TOPs) && SvROK(TOPm1s)) {
+ if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
SP--;
SETs(boolSV(SvRV(TOPs) != SvRV(TOPp1s)));
RETURN;
{
dSP; dTARGET; tryAMAGICbin(ncmp,0);
#ifndef NV_PRESERVES_UV
- if (SvROK(TOPs) && SvROK(TOPm1s)) {
+ if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
UV right = PTR2UV(SvRV(POPs));
UV left = PTR2UV(SvRV(TOPs));
SETi((left > right) - (left < right));
register I32 anum;
STRLEN len;
+ (void)SvPV_nomg(sv,len); /* force check for uninit var */
sv_setsv_nomg(TARG, sv);
tmps = (U8*)SvPV_force(TARG, len);
anum = len;
else preferring IV has introduced a subtle behaviour change bug. OTOH
relying on floating point to be accurate is a bug. */
- if (SvIOK(TOPs)) {
+ if (!SvOK(TOPs))
+ SETu(0);
+ else if (SvIOK(TOPs)) {
if (SvIsUV(TOPs)) {
UV uv = TOPu;
SETu(uv);
/* This will cache the NV value if string isn't actually integer */
IV iv = TOPi;
- if (SvIOK(TOPs)) {
+ if (!SvOK(TOPs))
+ SETu(0);
+ else if (SvIOK(TOPs)) {
/* IVX is precise */
if (SvIsUV(TOPs)) {
SETu(TOPu); /* force it to be numeric only */
if (utf8_curlen)
sv_pos_u2b(sv, &pos, &rem);
tmps += pos;
+ /* we either return a PV or an LV. If the TARG hasn't been used
+ * before, or is of that type, reuse it; otherwise use a mortal
+ * instead. Note that LVs can have an extended lifetime, so also
+ * dont reuse if refcount > 1 (bug #20933) */
+ if (SvTYPE(TARG) > SVt_NULL) {
+ if ( (SvTYPE(TARG) == SVt_PVLV)
+ ? (!lvalue || SvREFCNT(TARG) > 1)
+ : lvalue)
+ {
+ TARG = sv_newmortal();
+ }
+ }
+
sv_setpvn(TARG, tmps, rem);
#ifdef USE_LOCALE_COLLATE
sv_unmagic(TARG, PERL_MAGIC_collxfrm);
sv_setpvn(sv,"",0); /* avoid lexical reincarnation */
}
- if (SvREFCNT(TARG) > 1) /* don't share the TARG (#20933) */
- TARG = sv_newmortal();
if (SvTYPE(TARG) < SVt_PVLV) {
sv_upgrade(TARG, SVt_PVLV);
sv_magic(TARG, Nullsv, PERL_MAGIC_substr, Nullch, 0);
}
else
- (void)SvOK_off(TARG);
+ SvOK_off(TARG);
LvTYPE(TARG) = 'x';
if (LvTARG(TARG) != sv) {
}
if (GIMME != G_ARRAY) {
MARK = ORIGMARK;
- *++MARK = *SP;
+ *++MARK = SP > ORIGMARK ? *SP : &PL_sv_undef;
SP = MARK;
}
RETURN;
SP = ORIGMARK;
else if (gimme == G_SCALAR) {
MARK = ORIGMARK;
- *++MARK = *SP;
+ if (SP > MARK)
+ *++MARK = *SP;
+ else
+ *++MARK = &PL_sv_undef;
SP = MARK;
}
}
}
if (GIMME != G_ARRAY) {
MARK = ORIGMARK;
- *++MARK = *SP;
+ *++MARK = SP > ORIGMARK ? *SP : &PL_sv_undef;
SP = MARK;
}
RETURN;
if (newlen && !AvREAL(ary) && AvREIFY(ary))
av_reify(ary);
+ /* make new elements SVs now: avoid problems if they're from the array */
+ for (dst = MARK, i = newlen; i; i--) {
+ SV *h = *dst;
+ *dst = NEWSV(46, 0);
+ sv_setsv(*dst++, h);
+ }
+
if (diff < 0) { /* shrinking the area */
if (newlen) {
New(451, tmparyval, newlen, SV*); /* so remember insertion */
dst[--i] = &PL_sv_undef;
if (newlen) {
- for (src = tmparyval, dst = AvARRAY(ary) + offset;
- newlen; newlen--) {
- *dst = NEWSV(46, 0);
- sv_setsv(*dst++, *src++);
- }
+ Copy( tmparyval, AvARRAY(ary) + offset, newlen, SV* );
Safefree(tmparyval);
}
}
}
}
- for (src = MARK, dst = AvARRAY(ary) + offset; newlen; newlen--) {
- *dst = NEWSV(46, 0);
- sv_setsv(*dst++, *src++);
+ if (newlen) {
+ Copy( MARK, AvARRAY(ary) + offset, newlen, SV* );
}
+
MARK = ORIGMARK + 1;
if (GIMME == G_ARRAY) { /* copy return vals to stack */
if (length) {
register I32 tmp;
dTARGET;
STRLEN len;
+ I32 padoff_du;
SvUTF8_off(TARG); /* decontaminate */
if (SP - MARK > 1)
do_join(TARG, &PL_sv_no, MARK, SP);
else
- sv_setsv(TARG, (SP > MARK) ? *SP : DEFSV);
+ sv_setsv(TARG, (SP > MARK)
+ ? *SP
+ : (padoff_du = find_rundefsvoffset(),
+ (padoff_du == NOT_IN_PAD || PAD_COMPNAME_FLAGS(padoff_du) & SVpad_OUR)
+ ? DEFSV : PAD_SVl(padoff_du)));
up = SvPV_force(TARG, len);
if (len > 1) {
if (DO_UTF8(TARG)) { /* first reverse each character */
I32 origlimit = limit;
I32 realarray = 0;
I32 base;
- AV *oldstack = PL_curstack;
I32 gimme = GIMME_V;
I32 oldsave = PL_savestack_ix;
I32 make_mortal = 1;
AvARRAY(ary)[i] = &PL_sv_undef; /* don't free mere refs */
}
/* temporarily switch stacks */
- SWITCHSTACK(PL_curstack, ary);
- PL_curstackinfo->si_stack = ary;
+ SAVESWITCHSTACK(PL_curstack, ary);
make_mortal = 0;
}
}
}
}
- LEAVE_SCOPE(oldsave);
iters = (SP - PL_stack_base) - base;
if (iters > maxiters)
DIE(aTHX_ "Split loop");
if (TOPs && !make_mortal)
sv_2mortal(TOPs);
iters--;
- SP--;
+ *SP-- = &PL_sv_undef;
}
}
+ PUTBACK;
+ LEAVE_SCOPE(oldsave); /* may undo an earlier SWITCHSTACK */
+ SPAGAIN;
if (realarray) {
if (!mg) {
- SWITCHSTACK(ary, oldstack);
- PL_curstackinfo->si_stack = oldstack;
if (SvSMAGICAL(ary)) {
PUTBACK;
mg_set((SV*)ary);
projects / p5sagit/p5-mst-13.2.git / blobdiff