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pp_hot.c
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pp_hot.c
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/* pp_hot.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
* 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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.
*
*/
/*
* Then he heard Merry change the note, and up went the Horn-cry of Buckland,
* shaking the air.
*
* Awake! Awake! Fear, Fire, Foes! Awake!
* Fire, Foes! Awake!
*
* [p.1007 of _The Lord of the Rings_, VI/viii: "The Scouring of the Shire"]
*/
/* This file contains 'hot' 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.
*
* By 'hot', we mean common ops whose execution speed is critical.
* By gathering them together into a single file, we encourage
* CPU cache hits on hot code. Also it could be taken as a warning not to
* change any code in this file unless you're sure it won't affect
* performance.
*/
#include "EXTERN.h"
#define PERL_IN_PP_HOT_C
#include "perl.h"
/* Hot code. */
PP(pp_const)
{
dSP;
XPUSHs(cSVOP_sv);
RETURN;
}
PP(pp_nextstate)
{
PL_curcop = (COP*)PL_op;
PL_sawalias = 0;
TAINT_NOT; /* Each statement is presumed innocent */
PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
FREETMPS;
PERL_ASYNC_CHECK();
return NORMAL;
}
PP(pp_gvsv)
{
dSP;
EXTEND(SP,1);
if (UNLIKELY(PL_op->op_private & OPpLVAL_INTRO))
PUSHs(save_scalar(cGVOP_gv));
else
PUSHs(GvSVn(cGVOP_gv));
if (GvREFCNT(cGVOP_gv) > 1 || GvALIASED_SV(cGVOP_gv))
PL_sawalias = TRUE;
RETURN;
}
/* also used for: pp_lineseq() pp_regcmaybe() pp_scalar() pp_scope() */
PP(pp_null)
{
return NORMAL;
}
/* This is sometimes called directly by pp_coreargs, pp_grepstart and
amagic_call. */
PP(pp_pushmark)
{
PUSHMARK(PL_stack_sp);
return NORMAL;
}
PP(pp_stringify)
{
dSP; dTARGET;
SV * const sv = TOPs;
SETs(TARG);
sv_copypv(TARG, sv);
SvSETMAGIC(TARG);
/* no PUTBACK, SETs doesn't inc/dec SP */
return NORMAL;
}
PP(pp_gv)
{
dSP;
XPUSHs(MUTABLE_SV(cGVOP_gv));
if (isGV(cGVOP_gv)
&& (GvREFCNT(cGVOP_gv) > 1 || GvALIASED_SV(cGVOP_gv)))
PL_sawalias = TRUE;
RETURN;
}
/* also used for: pp_andassign() */
PP(pp_and)
{
PERL_ASYNC_CHECK();
{
/* SP is not used to remove a variable that is saved across the
sv_2bool_flags call in SvTRUE_NN, if a RISC/CISC or low/high machine
register or load/store vs direct mem ops macro is introduced, this
should be a define block between direct PL_stack_sp and dSP operations,
presently, using PL_stack_sp is bias towards CISC cpus */
SV * const sv = *PL_stack_sp;
if (!SvTRUE_NN(sv))
return NORMAL;
else {
if (PL_op->op_type == OP_AND)
--PL_stack_sp;
return cLOGOP->op_other;
}
}
}
PP(pp_sassign)
{
dSP;
/* sassign keeps its args in the optree traditionally backwards.
So we pop them differently.
*/
SV *left = POPs; SV *right = TOPs;
if (PL_op->op_private & OPpASSIGN_BACKWARDS) { /* {or,and.dor}assign */
SV * const temp = left;
left = right; right = temp;
}
if (TAINTING_get && UNLIKELY(TAINT_get) && !SvTAINTED(right))
TAINT_NOT;
if (UNLIKELY(PL_op->op_private & OPpASSIGN_CV_TO_GV)) {
/* *foo =\&bar */
SV * const cv = SvRV(right);
const U32 cv_type = SvTYPE(cv);
const bool is_gv = isGV_with_GP(left);
const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM;
if (!got_coderef) {
assert(SvROK(cv));
}
/* Can do the optimisation if left (LVALUE) is not a typeglob,
right (RVALUE) is a reference to something, and we're in void
context. */
if (!got_coderef && !is_gv && GIMME_V == G_VOID) {
/* Is the target symbol table currently empty? */
GV * const gv = gv_fetchsv_nomg(left, GV_NOINIT, SVt_PVGV);
if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) {
/* Good. Create a new proxy constant subroutine in the target.
The gv becomes a(nother) reference to the constant. */
SV *const value = SvRV(cv);
SvUPGRADE(MUTABLE_SV(gv), SVt_IV);
SvPCS_IMPORTED_on(gv);
SvRV_set(gv, value);
SvREFCNT_inc_simple_void(value);
SETs(left);
RETURN;
}
}
/* Need to fix things up. */
if (!is_gv) {
/* Need to fix GV. */
left = MUTABLE_SV(gv_fetchsv_nomg(left,GV_ADD, SVt_PVGV));
}
if (!got_coderef) {
/* We've been returned a constant rather than a full subroutine,
but they expect a subroutine reference to apply. */
if (SvROK(cv)) {
ENTER_with_name("sassign_coderef");
SvREFCNT_inc_void(SvRV(cv));
/* newCONSTSUB takes a reference count on the passed in SV
from us. We set the name to NULL, otherwise we get into
all sorts of fun as the reference to our new sub is
donated to the GV that we're about to assign to.
*/
SvRV_set(right, MUTABLE_SV(newCONSTSUB(GvSTASH(left), NULL,
SvRV(cv))));
SvREFCNT_dec_NN(cv);
LEAVE_with_name("sassign_coderef");
} else {
/* What can happen for the corner case *{"BONK"} = \&{"BONK"};
is that
First: ops for \&{"BONK"}; return us the constant in the
symbol table
Second: ops for *{"BONK"} cause that symbol table entry
(and our reference to it) to be upgraded from RV
to typeblob)
Thirdly: We get here. cv is actually PVGV now, and its
GvCV() is actually the subroutine we're looking for
So change the reference so that it points to the subroutine
of that typeglob, as that's what they were after all along.
*/
GV *const upgraded = MUTABLE_GV(cv);
CV *const source = GvCV(upgraded);
assert(source);
assert(CvFLAGS(source) & CVf_CONST);
SvREFCNT_inc_void(source);
SvREFCNT_dec_NN(upgraded);
SvRV_set(right, MUTABLE_SV(source));
}
}
}
if (
UNLIKELY(SvTEMP(left)) && !SvSMAGICAL(left) && SvREFCNT(left) == 1 &&
(!isGV_with_GP(left) || SvFAKE(left)) && ckWARN(WARN_MISC)
)
Perl_warner(aTHX_
packWARN(WARN_MISC), "Useless assignment to a temporary"
);
SvSetMagicSV(left, right);
SETs(left);
RETURN;
}
PP(pp_cond_expr)
{
dSP;
PERL_ASYNC_CHECK();
if (SvTRUEx(POPs))
RETURNOP(cLOGOP->op_other);
else
RETURNOP(cLOGOP->op_next);
}
PP(pp_unstack)
{
PERL_ASYNC_CHECK();
TAINT_NOT; /* Each statement is presumed innocent */
PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
FREETMPS;
if (!(PL_op->op_flags & OPf_SPECIAL)) {
I32 oldsave = PL_scopestack[PL_scopestack_ix - 1];
LEAVE_SCOPE(oldsave);
}
return NORMAL;
}
PP(pp_concat)
{
dSP; dATARGET; tryAMAGICbin_MG(concat_amg, AMGf_assign);
{
dPOPTOPssrl;
bool lbyte;
STRLEN rlen;
const char *rpv = NULL;
bool rbyte = FALSE;
bool rcopied = FALSE;
if (TARG == right && right != left) { /* $r = $l.$r */
rpv = SvPV_nomg_const(right, rlen);
rbyte = !DO_UTF8(right);
right = newSVpvn_flags(rpv, rlen, SVs_TEMP);
rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */
rcopied = TRUE;
}
if (TARG != left) { /* not $l .= $r */
STRLEN llen;
const char* const lpv = SvPV_nomg_const(left, llen);
lbyte = !DO_UTF8(left);
sv_setpvn(TARG, lpv, llen);
if (!lbyte)
SvUTF8_on(TARG);
else
SvUTF8_off(TARG);
}
else { /* $l .= $r and left == TARG */
if (!SvOK(left)) {
if (left == right && ckWARN(WARN_UNINITIALIZED)) /* $l .= $l */
report_uninit(right);
sv_setpvs(left, "");
}
else {
SvPV_force_nomg_nolen(left);
}
lbyte = !DO_UTF8(left);
if (IN_BYTES)
SvUTF8_off(left);
}
if (!rcopied) {
rpv = SvPV_nomg_const(right, rlen);
rbyte = !DO_UTF8(right);
}
if (lbyte != rbyte) {
if (lbyte)
sv_utf8_upgrade_nomg(TARG);
else {
if (!rcopied)
right = newSVpvn_flags(rpv, rlen, SVs_TEMP);
sv_utf8_upgrade_nomg(right);
rpv = SvPV_nomg_const(right, rlen);
}
}
sv_catpvn_nomg(TARG, rpv, rlen);
SETTARG;
RETURN;
}
}
/* push the elements of av onto the stack.
* XXX Note that padav has similar code but without the mg_get().
* I suspect that the mg_get is no longer needed, but while padav
* differs, it can't share this function */
STATIC void
S_pushav(pTHX_ AV* const av)
{
dSP;
const SSize_t maxarg = AvFILL(av) + 1;
EXTEND(SP, maxarg);
if (UNLIKELY(SvRMAGICAL(av))) {
PADOFFSET i;
for (i=0; i < (PADOFFSET)maxarg; i++) {
SV ** const svp = av_fetch(av, i, FALSE);
/* See note in pp_helem, and bug id #27839 */
SP[i+1] = svp
? SvGMAGICAL(*svp) ? (mg_get(*svp), *svp) : *svp
: &PL_sv_undef;
}
}
else {
PADOFFSET i;
for (i=0; i < (PADOFFSET)maxarg; i++) {
SV * const sv = AvARRAY(av)[i];
SP[i+1] = LIKELY(sv) ? sv : &PL_sv_undef;
}
}
SP += maxarg;
PUTBACK;
}
/* ($lex1,@lex2,...) or my ($lex1,@lex2,...) */
PP(pp_padrange)
{
dSP;
PADOFFSET base = PL_op->op_targ;
int count = (int)(PL_op->op_private) & OPpPADRANGE_COUNTMASK;
int i;
if (PL_op->op_flags & OPf_SPECIAL) {
/* fake the RHS of my ($x,$y,..) = @_ */
PUSHMARK(SP);
S_pushav(aTHX_ GvAVn(PL_defgv));
SPAGAIN;
}
/* note, this is only skipped for compile-time-known void cxt */
if ((PL_op->op_flags & OPf_WANT) != OPf_WANT_VOID) {
EXTEND(SP, count);
PUSHMARK(SP);
for (i = 0; i <count; i++)
*++SP = PAD_SV(base+i);
}
if (PL_op->op_private & OPpLVAL_INTRO) {
SV **svp = &(PAD_SVl(base));
const UV payload = (UV)(
(base << (OPpPADRANGE_COUNTSHIFT + SAVE_TIGHT_SHIFT))
| (count << SAVE_TIGHT_SHIFT)
| SAVEt_CLEARPADRANGE);
STATIC_ASSERT_STMT(OPpPADRANGE_COUNTMASK + 1 == (1 << OPpPADRANGE_COUNTSHIFT));
assert((payload >> (OPpPADRANGE_COUNTSHIFT+SAVE_TIGHT_SHIFT)) == base);
{
dSS_ADD;
SS_ADD_UV(payload);
SS_ADD_END(1);
}
for (i = 0; i <count; i++)
SvPADSTALE_off(*svp++); /* mark lexical as active */
}
RETURN;
}
PP(pp_padsv)
{
dSP;
EXTEND(SP, 1);
{
OP * const op = PL_op;
/* access PL_curpad once */
SV ** const padentry = &(PAD_SVl(op->op_targ));
{
dTARG;
TARG = *padentry;
PUSHs(TARG);
PUTBACK; /* no pop/push after this, TOPs ok */
}
if (op->op_flags & OPf_MOD) {
if (op->op_private & OPpLVAL_INTRO)
if (!(op->op_private & OPpPAD_STATE))
save_clearsv(padentry);
if (op->op_private & OPpDEREF) {
/* TOPs is equivalent to TARG here. Using TOPs (SP) rather
than TARG reduces the scope of TARG, so it does not
span the call to save_clearsv, resulting in smaller
machine code. */
TOPs = vivify_ref(TOPs, op->op_private & OPpDEREF);
}
}
return op->op_next;
}
}
PP(pp_readline)
{
dSP;
if (TOPs) {
SvGETMAGIC(TOPs);
tryAMAGICunTARGETlist(iter_amg, 0);
PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--);
}
else PL_last_in_gv = PL_argvgv, PL_stack_sp--;
if (!isGV_with_GP(PL_last_in_gv)) {
if (SvROK(PL_last_in_gv) && isGV_with_GP(SvRV(PL_last_in_gv)))
PL_last_in_gv = MUTABLE_GV(SvRV(PL_last_in_gv));
else {
dSP;
XPUSHs(MUTABLE_SV(PL_last_in_gv));
PUTBACK;
Perl_pp_rv2gv(aTHX);
PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--);
if (PL_last_in_gv == (GV *)&PL_sv_undef)
PL_last_in_gv = NULL;
else
assert(isGV_with_GP(PL_last_in_gv));
}
}
return do_readline();
}
PP(pp_eq)
{
dSP;
SV *left, *right;
tryAMAGICbin_MG(eq_amg, AMGf_set|AMGf_numeric);
right = POPs;
left = TOPs;
SETs(boolSV(
(SvIOK_notUV(left) && SvIOK_notUV(right))
? (SvIVX(left) == SvIVX(right))
: ( do_ncmp(left, right) == 0)
));
RETURN;
}
/* also used for: pp_i_predec() pp_i_preinc() pp_predec() */
PP(pp_preinc)
{
dSP;
const bool inc =
PL_op->op_type == OP_PREINC || PL_op->op_type == OP_I_PREINC;
if (UNLIKELY(SvTYPE(TOPs) >= SVt_PVAV || (isGV_with_GP(TOPs) && !SvFAKE(TOPs))))
Perl_croak_no_modify();
if (LIKELY(!SvREADONLY(TOPs) && !SvGMAGICAL(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs))
&& SvIVX(TOPs) != (inc ? IV_MAX : IV_MIN))
{
SvIV_set(TOPs, SvIVX(TOPs) + (inc ? 1 : -1));
SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
}
else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */
if (inc) sv_inc(TOPs);
else sv_dec(TOPs);
SvSETMAGIC(TOPs);
return NORMAL;
}
/* also used for: pp_orassign() */
PP(pp_or)
{
dSP;
PERL_ASYNC_CHECK();
if (SvTRUE(TOPs))
RETURN;
else {
if (PL_op->op_type == OP_OR)
--SP;
RETURNOP(cLOGOP->op_other);
}
}
/* also used for: pp_dor() pp_dorassign() */
PP(pp_defined)
{
dSP;
SV* sv;
bool defined;
const int op_type = PL_op->op_type;
const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN);
if (is_dor) {
PERL_ASYNC_CHECK();
sv = TOPs;
if (UNLIKELY(!sv || !SvANY(sv))) {
if (op_type == OP_DOR)
--SP;
RETURNOP(cLOGOP->op_other);
}
}
else {
/* OP_DEFINED */
sv = POPs;
if (UNLIKELY(!sv || !SvANY(sv)))
RETPUSHNO;
}
defined = FALSE;
switch (SvTYPE(sv)) {
case SVt_PVAV:
if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
defined = TRUE;
break;
case SVt_PVHV:
if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
defined = TRUE;
break;
case SVt_PVCV:
if (CvROOT(sv) || CvXSUB(sv))
defined = TRUE;
break;
default:
SvGETMAGIC(sv);
if (SvOK(sv))
defined = TRUE;
break;
}
if (is_dor) {
if(defined)
RETURN;
if(op_type == OP_DOR)
--SP;
RETURNOP(cLOGOP->op_other);
}
/* assuming OP_DEFINED */
if(defined)
RETPUSHYES;
RETPUSHNO;
}
PP(pp_add)
{
dSP; dATARGET; bool useleft; SV *svl, *svr;
tryAMAGICbin_MG(add_amg, AMGf_assign|AMGf_numeric);
svr = TOPs;
svl = TOPm1s;
useleft = USE_LEFT(svl);
#ifdef PERL_PRESERVE_IVUV
/* We must see if we can perform the addition with integers if possible,
as the integer code detects overflow while the NV code doesn't.
If either argument hasn't had a numeric conversion yet attempt to get
the IV. It's important to do this now, rather than just assuming that
it's not IOK as a PV of "9223372036854775806" may not take well to NV
addition, and an SV which is NOK, NV=6.0 ought to be coerced to
integer in case the second argument is IV=9223372036854775806
We can (now) rely on sv_2iv to do the right thing, only setting the
public IOK flag if the value in the NV (or PV) slot is truly integer.
A side effect is that this also aggressively prefers integer maths over
fp maths for integer values.
How to detect overflow?
C 99 section 6.2.6.1 says
The range of nonnegative values of a signed integer type is a subrange
of the corresponding unsigned integer type, and the representation of
the same value in each type is the same. A computation involving
unsigned operands can never overflow, because a result that cannot be
represented by the resulting unsigned integer type is reduced modulo
the number that is one greater than the largest value that can be
represented by the resulting type.
(the 9th paragraph)
which I read as "unsigned ints wrap."
signed integer overflow seems to be classed as "exception condition"
If an exceptional condition occurs during the evaluation of an
expression (that is, if the result is not mathematically defined or not
in the range of representable values for its type), the behavior is
undefined.
(6.5, the 5th paragraph)
I had assumed that on 2s complement machines signed arithmetic would
wrap, hence coded pp_add and pp_subtract on the assumption that
everything perl builds on would be happy. After much wailing and
gnashing of teeth it would seem that irix64 knows its ANSI spec well,
knows that it doesn't need to, and doesn't. Bah. Anyway, the all-
unsigned code below is actually shorter than the old code. :-)
*/
if (SvIV_please_nomg(svr)) {
/* Unless the left argument is integer in range we are going to have to
use NV maths. Hence only attempt to coerce the right argument if
we know the left is integer. */
UV auv = 0;
bool auvok = FALSE;
bool a_valid = 0;
if (!useleft) {
auv = 0;
a_valid = auvok = 1;
/* left operand is undef, treat as zero. + 0 is identity,
Could SETi or SETu right now, but space optimise by not adding
lots of code to speed up what is probably a rarish case. */
} else {
/* Left operand is defined, so is it IV? */
if (SvIV_please_nomg(svl)) {
if ((auvok = SvUOK(svl)))
auv = SvUVX(svl);
else {
const IV aiv = SvIVX(svl);
if (aiv >= 0) {
auv = aiv;
auvok = 1; /* Now acting as a sign flag. */
} else {
auv = (aiv == IV_MIN) ? (UV)aiv : (UV)(-aiv);
}
}
a_valid = 1;
}
}
if (a_valid) {
bool result_good = 0;
UV result;
UV buv;
bool buvok = SvUOK(svr);
if (buvok)
buv = SvUVX(svr);
else {
const IV biv = SvIVX(svr);
if (biv >= 0) {
buv = biv;
buvok = 1;
} else
buv = (biv == IV_MIN) ? (UV)biv : (UV)(-biv);
}
/* ?uvok if value is >= 0. basically, flagged as UV if it's +ve,
else "IV" now, independent of how it came in.
if a, b represents positive, A, B negative, a maps to -A etc
a + b => (a + b)
A + b => -(a - b)
a + B => (a - b)
A + B => -(a + b)
all UV maths. negate result if A negative.
add if signs same, subtract if signs differ. */
if (auvok ^ buvok) {
/* Signs differ. */
if (auv >= buv) {
result = auv - buv;
/* Must get smaller */
if (result <= auv)
result_good = 1;
} else {
result = buv - auv;
if (result <= buv) {
/* result really should be -(auv-buv). as its negation
of true value, need to swap our result flag */
auvok = !auvok;
result_good = 1;
}
}
} else {
/* Signs same */
result = auv + buv;
if (result >= auv)
result_good = 1;
}
if (result_good) {
SP--;
if (auvok)
SETu( result );
else {
/* Negate result */
if (result <= (UV)IV_MIN)
SETi(result == (UV)IV_MIN
? IV_MIN : -(IV)result);
else {
/* result valid, but out of range for IV. */
SETn( -(NV)result );
}
}
RETURN;
} /* Overflow, drop through to NVs. */
}
}
#endif
{
NV value = SvNV_nomg(svr);
(void)POPs;
if (!useleft) {
/* left operand is undef, treat as zero. + 0.0 is identity. */
SETn(value);
RETURN;
}
SETn( value + SvNV_nomg(svl) );
RETURN;
}
}
/* also used for: pp_aelemfast_lex() */
PP(pp_aelemfast)
{
dSP;
AV * const av = PL_op->op_type == OP_AELEMFAST_LEX
? MUTABLE_AV(PAD_SV(PL_op->op_targ)) : GvAVn(cGVOP_gv);
const U32 lval = PL_op->op_flags & OPf_MOD;
SV** const svp = av_fetch(av, (I8)PL_op->op_private, lval);
SV *sv = (svp ? *svp : &PL_sv_undef);
if (UNLIKELY(!svp && lval))
DIE(aTHX_ PL_no_aelem, (int)(I8)PL_op->op_private);
EXTEND(SP, 1);
if (!lval && SvRMAGICAL(av) && SvGMAGICAL(sv)) /* see note in pp_helem() */
mg_get(sv);
PUSHs(sv);
RETURN;
}
PP(pp_join)
{
dSP; dMARK; dTARGET;
MARK++;
do_join(TARG, *MARK, MARK, SP);
SP = MARK;
SETs(TARG);
RETURN;
}
PP(pp_pushre)
{
dSP;
#ifdef DEBUGGING
/*
* We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
* will be enough to hold an OP*.
*/
SV* const sv = sv_newmortal();
sv_upgrade(sv, SVt_PVLV);
LvTYPE(sv) = '/';
Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
XPUSHs(sv);
#else
XPUSHs(MUTABLE_SV(PL_op));
#endif
RETURN;
}
/* Oversized hot code. */
/* also used for: pp_say() */
PP(pp_print)
{
dSP; dMARK; dORIGMARK;
PerlIO *fp;
MAGIC *mg;
GV * const gv
= (PL_op->op_flags & OPf_STACKED) ? MUTABLE_GV(*++MARK) : PL_defoutgv;
IO *io = GvIO(gv);
if (io
&& (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar)))
{
had_magic:
if (MARK == ORIGMARK) {
/* If using default handle then we need to make space to
* pass object as 1st arg, so move other args up ...
*/
MEXTEND(SP, 1);
++MARK;
Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
++SP;
}
return Perl_tied_method(aTHX_ SV_CONST(PRINT), mark - 1, MUTABLE_SV(io),
mg,
(G_SCALAR | TIED_METHOD_ARGUMENTS_ON_STACK
| (PL_op->op_type == OP_SAY
? TIED_METHOD_SAY : 0)), sp - mark);
}
if (!io) {
if ( gv && GvEGVx(gv) && (io = GvIO(GvEGV(gv)))
&& (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar)))
goto had_magic;
report_evil_fh(gv);
SETERRNO(EBADF,RMS_IFI);
goto just_say_no;
}
else if (!(fp = IoOFP(io))) {
if (IoIFP(io))
report_wrongway_fh(gv, '<');
else
report_evil_fh(gv);
SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI);
goto just_say_no;
}
else {
SV * const ofs = GvSV(PL_ofsgv); /* $, */
MARK++;
if (ofs && (SvGMAGICAL(ofs) || SvOK(ofs))) {
while (MARK <= SP) {
if (!do_print(*MARK, fp))
break;
MARK++;
if (MARK <= SP) {
/* don't use 'ofs' here - it may be invalidated by magic callbacks */
if (!do_print(GvSV(PL_ofsgv), fp)) {
MARK--;
break;
}
}
}
}
else {
while (MARK <= SP) {
if (!do_print(*MARK, fp))
break;
MARK++;
}
}
if (MARK <= SP)
goto just_say_no;
else {
if (PL_op->op_type == OP_SAY) {
if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp))
goto just_say_no;
}
else if (PL_ors_sv && SvOK(PL_ors_sv))
if (!do_print(PL_ors_sv, fp)) /* $\ */
goto just_say_no;
if (IoFLAGS(io) & IOf_FLUSH)
if (PerlIO_flush(fp) == EOF)
goto just_say_no;
}
}
SP = ORIGMARK;
XPUSHs(&PL_sv_yes);
RETURN;
just_say_no:
SP = ORIGMARK;
XPUSHs(&PL_sv_undef);
RETURN;
}
/* also used for: pp_rv2hv() */
/* also called directly by pp_lvavref */
PP(pp_rv2av)
{
dSP; dTOPss;
const I32 gimme = GIMME_V;
static const char an_array[] = "an ARRAY";
static const char a_hash[] = "a HASH";
const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV
|| PL_op->op_type == OP_LVAVREF;
const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV;
SvGETMAGIC(sv);
if (SvROK(sv)) {
if (UNLIKELY(SvAMAGIC(sv))) {
sv = amagic_deref_call(sv, is_pp_rv2av ? to_av_amg : to_hv_amg);
}
sv = SvRV(sv);
if (UNLIKELY(SvTYPE(sv) != type))
/* diag_listed_as: Not an ARRAY reference */
DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash);
else if (UNLIKELY(PL_op->op_flags & OPf_MOD
&& PL_op->op_private & OPpLVAL_INTRO))
Perl_croak(aTHX_ "%s", PL_no_localize_ref);
}
else if (UNLIKELY(SvTYPE(sv) != type)) {
GV *gv;
if (!isGV_with_GP(sv)) {
gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash,
type, &sp);
if (!gv)
RETURN;
}
else {
gv = MUTABLE_GV(sv);
}
sv = is_pp_rv2av ? MUTABLE_SV(GvAVn(gv)) : MUTABLE_SV(GvHVn(gv));
if (PL_op->op_private & OPpLVAL_INTRO)
sv = is_pp_rv2av ? MUTABLE_SV(save_ary(gv)) : MUTABLE_SV(save_hash(gv));
}
if (PL_op->op_flags & OPf_REF) {
SETs(sv);
RETURN;
}
else if (UNLIKELY(PL_op->op_private & OPpMAYBE_LVSUB)) {
const I32 flags = is_lvalue_sub();
if (flags && !(flags & OPpENTERSUB_INARGS)) {
if (gimme != G_ARRAY)
goto croak_cant_return;
SETs(sv);
RETURN;
}
}
if (is_pp_rv2av) {
AV *const av = MUTABLE_AV(sv);
/* The guts of pp_rv2av */
if (gimme == G_ARRAY) {
SP--;
PUTBACK;
S_pushav(aTHX_ av);
SPAGAIN;
}
else if (gimme == G_SCALAR) {
dTARGET;
const SSize_t maxarg = AvFILL(av) + 1;
SETi(maxarg);
}
} else {
/* The guts of pp_rv2hv */
if (gimme == G_ARRAY) { /* array wanted */
*PL_stack_sp = sv;
return Perl_do_kv(aTHX);
}
else if ((PL_op->op_private & OPpTRUEBOOL
|| ( PL_op->op_private & OPpMAYBE_TRUEBOOL
&& block_gimme() == G_VOID ))
&& (!SvRMAGICAL(sv) || !mg_find(sv, PERL_MAGIC_tied)))
SETs(HvUSEDKEYS(sv) ? &PL_sv_yes : sv_2mortal(newSViv(0)));
else if (gimme == G_SCALAR) {
dTARG;
TARG = Perl_hv_scalar(aTHX_ MUTABLE_HV(sv));
SETTARG;
}
}
RETURN;
croak_cant_return:
Perl_croak(aTHX_ "Can't return %s to lvalue scalar context",
is_pp_rv2av ? "array" : "hash");
RETURN;
}
STATIC void
S_do_oddball(pTHX_ SV **oddkey, SV **firstkey)
{
PERL_ARGS_ASSERT_DO_ODDBALL;
if (*oddkey) {
if (ckWARN(WARN_MISC)) {
const char *err;
if (oddkey == firstkey &&
SvROK(*oddkey) &&
(SvTYPE(SvRV(*oddkey)) == SVt_PVAV ||
SvTYPE(SvRV(*oddkey)) == SVt_PVHV))
{
err = "Reference found where even-sized list expected";
}
else
err = "Odd number of elements in hash assignment";
Perl_warner(aTHX_ packWARN(WARN_MISC), "%s", err);