forked from schacon/perl
/
pp.c
5418 lines (5096 loc) · 108 KB
/
pp.c
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/* pp.c
*
* Copyright (c) 1991-2001, 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.
*
*/
/*
* "It's a big house this, and very peculiar. Always a bit more to discover,
* and no knowing what you'll find around a corner. And Elves, sir!" --Samwise
*/
#include "EXTERN.h"
#define PERL_IN_PP_C
#include "perl.h"
/*
* The compiler on Concurrent CX/UX systems has a subtle bug which only
* seems to show up when compiling pp.c - it generates the wrong double
* precision constant value for (double)UV_MAX when used inline in the body
* of the code below, so this makes a static variable up front (which the
* compiler seems to get correct) and uses it in place of UV_MAX below.
*/
#ifdef CXUX_BROKEN_CONSTANT_CONVERT
static double UV_MAX_cxux = ((double)UV_MAX);
#endif
/*
* Offset for integer pack/unpack.
*
* On architectures where I16 and I32 aren't really 16 and 32 bits,
* which for now are all Crays, pack and unpack have to play games.
*/
/*
* These values are required for portability of pack() output.
* If they're not right on your machine, then pack() and unpack()
* wouldn't work right anyway; you'll need to apply the Cray hack.
* (I'd like to check them with #if, but you can't use sizeof() in
* the preprocessor.) --???
*/
/*
The appropriate SHORTSIZE, INTSIZE, LONGSIZE, and LONGLONGSIZE
defines are now in config.h. --Andy Dougherty April 1998
*/
#define SIZE16 2
#define SIZE32 4
/* CROSSCOMPILE and MULTIARCH are going to affect pp_pack() and pp_unpack().
--jhi Feb 1999 */
#if SHORTSIZE != SIZE16 || LONGSIZE != SIZE32
# define PERL_NATINT_PACK
#endif
#if LONGSIZE > 4 && defined(_CRAY)
# if BYTEORDER == 0x12345678
# define OFF16(p) (char*)(p)
# define OFF32(p) (char*)(p)
# else
# if BYTEORDER == 0x87654321
# define OFF16(p) ((char*)(p) + (sizeof(U16) - SIZE16))
# define OFF32(p) ((char*)(p) + (sizeof(U32) - SIZE32))
# else
}}}} bad cray byte order
# endif
# endif
# define COPY16(s,p) (*(p) = 0, Copy(s, OFF16(p), SIZE16, char))
# define COPY32(s,p) (*(p) = 0, Copy(s, OFF32(p), SIZE32, char))
# define COPYNN(s,p,n) (*(p) = 0, Copy(s, (char *)(p), n, char))
# define CAT16(sv,p) sv_catpvn(sv, OFF16(p), SIZE16)
# define CAT32(sv,p) sv_catpvn(sv, OFF32(p), SIZE32)
#else
# define COPY16(s,p) Copy(s, p, SIZE16, char)
# define COPY32(s,p) Copy(s, p, SIZE32, char)
# define COPYNN(s,p,n) Copy(s, (char *)(p), n, char)
# define CAT16(sv,p) sv_catpvn(sv, (char*)(p), SIZE16)
# define CAT32(sv,p) sv_catpvn(sv, (char*)(p), SIZE32)
#endif
/* variations on pp_null */
/* XXX I can't imagine anyone who doesn't have this actually _needs_
it, since pid_t is an integral type.
--AD 2/20/1998
*/
#ifdef NEED_GETPID_PROTO
extern Pid_t getpid (void);
#endif
PP(pp_stub)
{
dSP;
if (GIMME_V == G_SCALAR)
XPUSHs(&PL_sv_undef);
RETURN;
}
PP(pp_scalar)
{
return NORMAL;
}
/* Pushy stuff. */
PP(pp_padav)
{
dSP; dTARGET;
if (PL_op->op_private & OPpLVAL_INTRO)
SAVECLEARSV(PL_curpad[PL_op->op_targ]);
EXTEND(SP, 1);
if (PL_op->op_flags & OPf_REF) {
PUSHs(TARG);
RETURN;
} else if (LVRET) {
if (GIMME == G_SCALAR)
Perl_croak(aTHX_ "Can't return array to lvalue scalar context");
PUSHs(TARG);
RETURN;
}
if (GIMME == G_ARRAY) {
I32 maxarg = AvFILL((AV*)TARG) + 1;
EXTEND(SP, maxarg);
if (SvMAGICAL(TARG)) {
U32 i;
for (i=0; i < maxarg; i++) {
SV **svp = av_fetch((AV*)TARG, i, FALSE);
SP[i+1] = (svp) ? *svp : &PL_sv_undef;
}
}
else {
Copy(AvARRAY((AV*)TARG), SP+1, maxarg, SV*);
}
SP += maxarg;
}
else {
SV* sv = sv_newmortal();
I32 maxarg = AvFILL((AV*)TARG) + 1;
sv_setiv(sv, maxarg);
PUSHs(sv);
}
RETURN;
}
PP(pp_padhv)
{
dSP; dTARGET;
I32 gimme;
XPUSHs(TARG);
if (PL_op->op_private & OPpLVAL_INTRO)
SAVECLEARSV(PL_curpad[PL_op->op_targ]);
if (PL_op->op_flags & OPf_REF)
RETURN;
else if (LVRET) {
if (GIMME == G_SCALAR)
Perl_croak(aTHX_ "Can't return hash to lvalue scalar context");
RETURN;
}
gimme = GIMME_V;
if (gimme == G_ARRAY) {
RETURNOP(do_kv());
}
else if (gimme == G_SCALAR) {
SV* sv = sv_newmortal();
if (HvFILL((HV*)TARG))
Perl_sv_setpvf(aTHX_ sv, "%ld/%ld",
(long)HvFILL((HV*)TARG), (long)HvMAX((HV*)TARG) + 1);
else
sv_setiv(sv, 0);
SETs(sv);
}
RETURN;
}
PP(pp_padany)
{
DIE(aTHX_ "NOT IMPL LINE %d",__LINE__);
}
/* Translations. */
PP(pp_rv2gv)
{
dSP; dTOPss;
if (SvROK(sv)) {
wasref:
tryAMAGICunDEREF(to_gv);
sv = SvRV(sv);
if (SvTYPE(sv) == SVt_PVIO) {
GV *gv = (GV*) sv_newmortal();
gv_init(gv, 0, "", 0, 0);
GvIOp(gv) = (IO *)sv;
(void)SvREFCNT_inc(sv);
sv = (SV*) gv;
}
else if (SvTYPE(sv) != SVt_PVGV)
DIE(aTHX_ "Not a GLOB reference");
}
else {
if (SvTYPE(sv) != SVt_PVGV) {
char *sym;
STRLEN len;
if (SvGMAGICAL(sv)) {
mg_get(sv);
if (SvROK(sv))
goto wasref;
}
if (!SvOK(sv) && sv != &PL_sv_undef) {
/* If this is a 'my' scalar and flag is set then vivify
* NI-S 1999/05/07
*/
if (PL_op->op_private & OPpDEREF) {
char *name;
GV *gv;
if (cUNOP->op_targ) {
STRLEN len;
SV *namesv = PL_curpad[cUNOP->op_targ];
name = SvPV(namesv, len);
gv = (GV*)NEWSV(0,0);
gv_init(gv, CopSTASH(PL_curcop), name, len, 0);
}
else {
name = CopSTASHPV(PL_curcop);
gv = newGVgen(name);
}
sv_upgrade(sv, SVt_RV);
SvRV(sv) = (SV*)gv;
SvROK_on(sv);
SvSETMAGIC(sv);
goto wasref;
}
if (PL_op->op_flags & OPf_REF ||
PL_op->op_private & HINT_STRICT_REFS)
DIE(aTHX_ PL_no_usym, "a symbol");
if (ckWARN(WARN_UNINITIALIZED))
report_uninit();
RETSETUNDEF;
}
sym = SvPV(sv,len);
if ((PL_op->op_flags & OPf_SPECIAL) &&
!(PL_op->op_flags & OPf_MOD))
{
sv = (SV*)gv_fetchpv(sym, FALSE, SVt_PVGV);
if (!sv
&& (!is_gv_magical(sym,len,0)
|| !(sv = (SV*)gv_fetchpv(sym, TRUE, SVt_PVGV))))
{
RETSETUNDEF;
}
}
else {
if (PL_op->op_private & HINT_STRICT_REFS)
DIE(aTHX_ PL_no_symref, sym, "a symbol");
sv = (SV*)gv_fetchpv(sym, TRUE, SVt_PVGV);
}
}
}
if (PL_op->op_private & OPpLVAL_INTRO)
save_gp((GV*)sv, !(PL_op->op_flags & OPf_SPECIAL));
SETs(sv);
RETURN;
}
PP(pp_rv2sv)
{
dSP; dTOPss;
if (SvROK(sv)) {
wasref:
tryAMAGICunDEREF(to_sv);
sv = SvRV(sv);
switch (SvTYPE(sv)) {
case SVt_PVAV:
case SVt_PVHV:
case SVt_PVCV:
DIE(aTHX_ "Not a SCALAR reference");
}
}
else {
GV *gv = (GV*)sv;
char *sym;
STRLEN len;
if (SvTYPE(gv) != SVt_PVGV) {
if (SvGMAGICAL(sv)) {
mg_get(sv);
if (SvROK(sv))
goto wasref;
}
if (!SvOK(sv)) {
if (PL_op->op_flags & OPf_REF ||
PL_op->op_private & HINT_STRICT_REFS)
DIE(aTHX_ PL_no_usym, "a SCALAR");
if (ckWARN(WARN_UNINITIALIZED))
report_uninit();
RETSETUNDEF;
}
sym = SvPV(sv, len);
if ((PL_op->op_flags & OPf_SPECIAL) &&
!(PL_op->op_flags & OPf_MOD))
{
gv = (GV*)gv_fetchpv(sym, FALSE, SVt_PV);
if (!gv
&& (!is_gv_magical(sym,len,0)
|| !(gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PV))))
{
RETSETUNDEF;
}
}
else {
if (PL_op->op_private & HINT_STRICT_REFS)
DIE(aTHX_ PL_no_symref, sym, "a SCALAR");
gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PV);
}
}
sv = GvSV(gv);
}
if (PL_op->op_flags & OPf_MOD) {
if (PL_op->op_private & OPpLVAL_INTRO)
sv = save_scalar((GV*)TOPs);
else if (PL_op->op_private & OPpDEREF)
vivify_ref(sv, PL_op->op_private & OPpDEREF);
}
SETs(sv);
RETURN;
}
PP(pp_av2arylen)
{
dSP;
AV *av = (AV*)TOPs;
SV *sv = AvARYLEN(av);
if (!sv) {
AvARYLEN(av) = sv = NEWSV(0,0);
sv_upgrade(sv, SVt_IV);
sv_magic(sv, (SV*)av, '#', Nullch, 0);
}
SETs(sv);
RETURN;
}
PP(pp_pos)
{
dSP; dTARGET; dPOPss;
if (PL_op->op_flags & OPf_MOD || LVRET) {
if (SvTYPE(TARG) < SVt_PVLV) {
sv_upgrade(TARG, SVt_PVLV);
sv_magic(TARG, Nullsv, '.', Nullch, 0);
}
LvTYPE(TARG) = '.';
if (LvTARG(TARG) != sv) {
if (LvTARG(TARG))
SvREFCNT_dec(LvTARG(TARG));
LvTARG(TARG) = SvREFCNT_inc(sv);
}
PUSHs(TARG); /* no SvSETMAGIC */
RETURN;
}
else {
MAGIC* mg;
if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
mg = mg_find(sv, 'g');
if (mg && mg->mg_len >= 0) {
I32 i = mg->mg_len;
if (DO_UTF8(sv))
sv_pos_b2u(sv, &i);
PUSHi(i + PL_curcop->cop_arybase);
RETURN;
}
}
RETPUSHUNDEF;
}
}
PP(pp_rv2cv)
{
dSP;
GV *gv;
HV *stash;
/* We usually try to add a non-existent subroutine in case of AUTOLOAD. */
/* (But not in defined().) */
CV *cv = sv_2cv(TOPs, &stash, &gv, !(PL_op->op_flags & OPf_SPECIAL));
if (cv) {
if (CvCLONE(cv))
cv = (CV*)sv_2mortal((SV*)cv_clone(cv));
if ((PL_op->op_private & OPpLVAL_INTRO)) {
if (gv && GvCV(gv) == cv && (gv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), FALSE)))
cv = GvCV(gv);
if (!CvLVALUE(cv))
DIE(aTHX_ "Can't modify non-lvalue subroutine call");
}
}
else
cv = (CV*)&PL_sv_undef;
SETs((SV*)cv);
RETURN;
}
PP(pp_prototype)
{
dSP;
CV *cv;
HV *stash;
GV *gv;
SV *ret;
ret = &PL_sv_undef;
if (SvPOK(TOPs) && SvCUR(TOPs) >= 7) {
char *s = SvPVX(TOPs);
if (strnEQ(s, "CORE::", 6)) {
int code;
code = keyword(s + 6, SvCUR(TOPs) - 6);
if (code < 0) { /* Overridable. */
#define MAX_ARGS_OP ((sizeof(I32) - 1) * 2)
int i = 0, n = 0, seen_question = 0;
I32 oa;
char str[ MAX_ARGS_OP * 2 + 2 ]; /* One ';', one '\0' */
while (i < MAXO) { /* The slow way. */
if (strEQ(s + 6, PL_op_name[i])
|| strEQ(s + 6, PL_op_desc[i]))
{
goto found;
}
i++;
}
goto nonesuch; /* Should not happen... */
found:
oa = PL_opargs[i] >> OASHIFT;
while (oa) {
if (oa & OA_OPTIONAL) {
seen_question = 1;
str[n++] = ';';
}
else if (n && str[0] == ';' && seen_question)
goto set; /* XXXX system, exec */
if ((oa & (OA_OPTIONAL - 1)) >= OA_AVREF
&& (oa & (OA_OPTIONAL - 1)) <= OA_HVREF) {
str[n++] = '\\';
}
/* What to do with R ((un)tie, tied, (sys)read, recv)? */
str[n++] = ("?$@@%&*$")[oa & (OA_OPTIONAL - 1)];
oa = oa >> 4;
}
str[n++] = '\0';
ret = sv_2mortal(newSVpvn(str, n - 1));
}
else if (code) /* Non-Overridable */
goto set;
else { /* None such */
nonesuch:
DIE(aTHX_ "Can't find an opnumber for \"%s\"", s+6);
}
}
}
cv = sv_2cv(TOPs, &stash, &gv, FALSE);
if (cv && SvPOK(cv))
ret = sv_2mortal(newSVpvn(SvPVX(cv), SvCUR(cv)));
set:
SETs(ret);
RETURN;
}
PP(pp_anoncode)
{
dSP;
CV* cv = (CV*)PL_curpad[PL_op->op_targ];
if (CvCLONE(cv))
cv = (CV*)sv_2mortal((SV*)cv_clone(cv));
EXTEND(SP,1);
PUSHs((SV*)cv);
RETURN;
}
PP(pp_srefgen)
{
dSP;
*SP = refto(*SP);
RETURN;
}
PP(pp_refgen)
{
dSP; dMARK;
if (GIMME != G_ARRAY) {
if (++MARK <= SP)
*MARK = *SP;
else
*MARK = &PL_sv_undef;
*MARK = refto(*MARK);
SP = MARK;
RETURN;
}
EXTEND_MORTAL(SP - MARK);
while (++MARK <= SP)
*MARK = refto(*MARK);
RETURN;
}
STATIC SV*
S_refto(pTHX_ SV *sv)
{
SV* rv;
if (SvTYPE(sv) == SVt_PVLV && LvTYPE(sv) == 'y') {
if (LvTARGLEN(sv))
vivify_defelem(sv);
if (!(sv = LvTARG(sv)))
sv = &PL_sv_undef;
else
(void)SvREFCNT_inc(sv);
}
else if (SvTYPE(sv) == SVt_PVAV) {
if (!AvREAL((AV*)sv) && AvREIFY((AV*)sv))
av_reify((AV*)sv);
SvTEMP_off(sv);
(void)SvREFCNT_inc(sv);
}
else if (SvPADTMP(sv))
sv = newSVsv(sv);
else {
SvTEMP_off(sv);
(void)SvREFCNT_inc(sv);
}
rv = sv_newmortal();
sv_upgrade(rv, SVt_RV);
SvRV(rv) = sv;
SvROK_on(rv);
return rv;
}
PP(pp_ref)
{
dSP; dTARGET;
SV *sv;
char *pv;
sv = POPs;
if (sv && SvGMAGICAL(sv))
mg_get(sv);
if (!sv || !SvROK(sv))
RETPUSHNO;
sv = SvRV(sv);
pv = sv_reftype(sv,TRUE);
PUSHp(pv, strlen(pv));
RETURN;
}
PP(pp_bless)
{
dSP;
HV *stash;
if (MAXARG == 1)
stash = CopSTASH(PL_curcop);
else {
SV *ssv = POPs;
STRLEN len;
char *ptr = SvPV(ssv,len);
if (ckWARN(WARN_MISC) && len == 0)
Perl_warner(aTHX_ WARN_MISC,
"Explicit blessing to '' (assuming package main)");
stash = gv_stashpvn(ptr, len, TRUE);
}
(void)sv_bless(TOPs, stash);
RETURN;
}
PP(pp_gelem)
{
GV *gv;
SV *sv;
SV *tmpRef;
char *elem;
dSP;
STRLEN n_a;
sv = POPs;
elem = SvPV(sv, n_a);
gv = (GV*)POPs;
tmpRef = Nullsv;
sv = Nullsv;
switch (elem ? *elem : '\0')
{
case 'A':
if (strEQ(elem, "ARRAY"))
tmpRef = (SV*)GvAV(gv);
break;
case 'C':
if (strEQ(elem, "CODE"))
tmpRef = (SV*)GvCVu(gv);
break;
case 'F':
if (strEQ(elem, "FILEHANDLE")) /* XXX deprecate in 5.005 */
tmpRef = (SV*)GvIOp(gv);
break;
case 'G':
if (strEQ(elem, "GLOB"))
tmpRef = (SV*)gv;
break;
case 'H':
if (strEQ(elem, "HASH"))
tmpRef = (SV*)GvHV(gv);
break;
case 'I':
if (strEQ(elem, "IO"))
tmpRef = (SV*)GvIOp(gv);
break;
case 'N':
if (strEQ(elem, "NAME"))
sv = newSVpvn(GvNAME(gv), GvNAMELEN(gv));
break;
case 'P':
if (strEQ(elem, "PACKAGE"))
sv = newSVpv(HvNAME(GvSTASH(gv)), 0);
break;
case 'S':
if (strEQ(elem, "SCALAR"))
tmpRef = GvSV(gv);
break;
}
if (tmpRef)
sv = newRV(tmpRef);
if (sv)
sv_2mortal(sv);
else
sv = &PL_sv_undef;
XPUSHs(sv);
RETURN;
}
/* Pattern matching */
PP(pp_study)
{
dSP; dPOPss;
register unsigned char *s;
register I32 pos;
register I32 ch;
register I32 *sfirst;
register I32 *snext;
STRLEN len;
if (sv == PL_lastscream) {
if (SvSCREAM(sv))
RETPUSHYES;
}
else {
if (PL_lastscream) {
SvSCREAM_off(PL_lastscream);
SvREFCNT_dec(PL_lastscream);
}
PL_lastscream = SvREFCNT_inc(sv);
}
s = (unsigned char*)(SvPV(sv, len));
pos = len;
if (pos <= 0)
RETPUSHNO;
if (pos > PL_maxscream) {
if (PL_maxscream < 0) {
PL_maxscream = pos + 80;
New(301, PL_screamfirst, 256, I32);
New(302, PL_screamnext, PL_maxscream, I32);
}
else {
PL_maxscream = pos + pos / 4;
Renew(PL_screamnext, PL_maxscream, I32);
}
}
sfirst = PL_screamfirst;
snext = PL_screamnext;
if (!sfirst || !snext)
DIE(aTHX_ "do_study: out of memory");
for (ch = 256; ch; --ch)
*sfirst++ = -1;
sfirst -= 256;
while (--pos >= 0) {
ch = s[pos];
if (sfirst[ch] >= 0)
snext[pos] = sfirst[ch] - pos;
else
snext[pos] = -pos;
sfirst[ch] = pos;
}
SvSCREAM_on(sv);
sv_magic(sv, Nullsv, 'g', Nullch, 0); /* piggyback on m//g magic */
RETPUSHYES;
}
PP(pp_trans)
{
dSP; dTARG;
SV *sv;
if (PL_op->op_flags & OPf_STACKED)
sv = POPs;
else {
sv = DEFSV;
EXTEND(SP,1);
}
TARG = sv_newmortal();
PUSHi(do_trans(sv));
RETURN;
}
/* Lvalue operators. */
PP(pp_schop)
{
dSP; dTARGET;
do_chop(TARG, TOPs);
SETTARG;
RETURN;
}
PP(pp_chop)
{
dSP; dMARK; dTARGET; dORIGMARK;
while (MARK < SP)
do_chop(TARG, *++MARK);
SP = ORIGMARK;
PUSHTARG;
RETURN;
}
PP(pp_schomp)
{
dSP; dTARGET;
SETi(do_chomp(TOPs));
RETURN;
}
PP(pp_chomp)
{
dSP; dMARK; dTARGET;
register I32 count = 0;
while (SP > MARK)
count += do_chomp(POPs);
PUSHi(count);
RETURN;
}
PP(pp_defined)
{
dSP;
register SV* sv;
sv = POPs;
if (!sv || !SvANY(sv))
RETPUSHNO;
switch (SvTYPE(sv)) {
case SVt_PVAV:
if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv,'P')))
RETPUSHYES;
break;
case SVt_PVHV:
if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv,'P')))
RETPUSHYES;
break;
case SVt_PVCV:
if (CvROOT(sv) || CvXSUB(sv))
RETPUSHYES;
break;
default:
if (SvGMAGICAL(sv))
mg_get(sv);
if (SvOK(sv))
RETPUSHYES;
}
RETPUSHNO;
}
PP(pp_undef)
{
dSP;
SV *sv;
if (!PL_op->op_private) {
EXTEND(SP, 1);
RETPUSHUNDEF;
}
sv = POPs;
if (!sv)
RETPUSHUNDEF;
if (SvTHINKFIRST(sv))
sv_force_normal(sv);
switch (SvTYPE(sv)) {
case SVt_NULL:
break;
case SVt_PVAV:
av_undef((AV*)sv);
break;
case SVt_PVHV:
hv_undef((HV*)sv);
break;
case SVt_PVCV:
if (ckWARN(WARN_MISC) && cv_const_sv((CV*)sv))
Perl_warner(aTHX_ WARN_MISC, "Constant subroutine %s undefined",
CvANON((CV*)sv) ? "(anonymous)" : GvENAME(CvGV((CV*)sv)));
/* FALL THROUGH */
case SVt_PVFM:
{
/* let user-undef'd sub keep its identity */
GV* gv = CvGV((CV*)sv);
cv_undef((CV*)sv);
CvGV((CV*)sv) = gv;
}
break;
case SVt_PVGV:
if (SvFAKE(sv))
SvSetMagicSV(sv, &PL_sv_undef);
else {
GP *gp;
gp_free((GV*)sv);
Newz(602, gp, 1, GP);
GvGP(sv) = gp_ref(gp);
GvSV(sv) = NEWSV(72,0);
GvLINE(sv) = CopLINE(PL_curcop);
GvEGV(sv) = (GV*)sv;
GvMULTI_on(sv);
}
break;
default:
if (SvTYPE(sv) >= SVt_PV && SvPVX(sv) && SvLEN(sv)) {
(void)SvOOK_off(sv);
Safefree(SvPVX(sv));
SvPV_set(sv, Nullch);
SvLEN_set(sv, 0);
}
(void)SvOK_off(sv);
SvSETMAGIC(sv);
}
RETPUSHUNDEF;
}
PP(pp_predec)
{
dSP;
if (SvREADONLY(TOPs) || SvTYPE(TOPs) > SVt_PVLV)
DIE(aTHX_ PL_no_modify);
if (SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
SvIVX(TOPs) != IV_MIN)
{
--SvIVX(TOPs);
SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
}
else
sv_dec(TOPs);
SvSETMAGIC(TOPs);
return NORMAL;
}
PP(pp_postinc)
{
dSP; dTARGET;
if (SvREADONLY(TOPs) || SvTYPE(TOPs) > SVt_PVLV)
DIE(aTHX_ PL_no_modify);
sv_setsv(TARG, TOPs);
if (SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
SvIVX(TOPs) != IV_MAX)
{
++SvIVX(TOPs);
SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
}
else
sv_inc(TOPs);
SvSETMAGIC(TOPs);
if (!SvOK(TARG))
sv_setiv(TARG, 0);
SETs(TARG);
return NORMAL;
}
PP(pp_postdec)
{
dSP; dTARGET;
if (SvREADONLY(TOPs) || SvTYPE(TOPs) > SVt_PVLV)
DIE(aTHX_ PL_no_modify);
sv_setsv(TARG, TOPs);
if (SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
SvIVX(TOPs) != IV_MIN)
{
--SvIVX(TOPs);
SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
}
else
sv_dec(TOPs);
SvSETMAGIC(TOPs);
SETs(TARG);
return NORMAL;
}
/* Ordinary operators. */
PP(pp_pow)
{
dSP; dATARGET; tryAMAGICbin(pow,opASSIGN);
{
dPOPTOPnnrl;
SETn( Perl_pow( left, right) );
RETURN;
}
}
PP(pp_multiply)
{
dSP; dATARGET; tryAMAGICbin(mult,opASSIGN);
{
dPOPTOPnnrl;
SETn( left * right );
RETURN;
}
}
PP(pp_divide)
{
dSP; dATARGET; tryAMAGICbin(div,opASSIGN);
{
dPOPPOPnnrl;
NV value;
if (right == 0.0)
DIE(aTHX_ "Illegal division by zero");
#ifdef SLOPPYDIVIDE
/* insure that 20./5. == 4. */
{
IV k;
if ((NV)I_V(left) == left &&
(NV)I_V(right) == right &&
(k = I_V(left)/I_V(right))*I_V(right) == I_V(left)) {
value = k;
}
else {
value = left / right;
}
}
#else
value = left / right;
#endif
PUSHn( value );
RETURN;
}
}
PP(pp_modulo)
{
dSP; dATARGET; tryAMAGICbin(modulo,opASSIGN);
{
UV left;
UV right;
bool left_neg;
bool right_neg;
bool use_double = 0;
NV dright;
NV dleft;
if (SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs)) {
IV i = SvIVX(POPs);
right = (right_neg = (i < 0)) ? -i : i;
}
else {
dright = POPn;
use_double = 1;
right_neg = dright < 0;
if (right_neg)
dright = -dright;
}
if (!use_double && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs)) {
IV i = SvIVX(POPs);
left = (left_neg = (i < 0)) ? -i : i;
}
else {
dleft = POPn;