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freebsd/contrib/perl5/op.c
Mark Murray 120a02d4f3 Vendor import of Perl 5.006
2000-06-25 11:04:01 +00:00

6724 lines
159 KiB
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/* op.c
*
* Copyright (c) 1991-2000, 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.
*
*/
/*
* "You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was
* our Mr. Bilbo's first cousin on the mother's side (her mother being the
* youngest of the Old Took's daughters); and Mr. Drogo was his second
* cousin. So Mr. Frodo is his first *and* second cousin, once removed
* either way, as the saying is, if you follow me." --the Gaffer
*/
#include "EXTERN.h"
#define PERL_IN_OP_C
#include "perl.h"
#include "keywords.h"
/* #define PL_OP_SLAB_ALLOC */
#ifdef PL_OP_SLAB_ALLOC
#define SLAB_SIZE 8192
static char *PL_OpPtr = NULL;
static int PL_OpSpace = 0;
#define NewOp(m,var,c,type) do { if ((PL_OpSpace -= c*sizeof(type)) >= 0) \
var = (type *)(PL_OpPtr -= c*sizeof(type)); \
else \
var = (type *) Slab_Alloc(m,c*sizeof(type)); \
} while (0)
STATIC void *
S_Slab_Alloc(pTHX_ int m, size_t sz)
{
Newz(m,PL_OpPtr,SLAB_SIZE,char);
PL_OpSpace = SLAB_SIZE - sz;
return PL_OpPtr += PL_OpSpace;
}
#else
#define NewOp(m, var, c, type) Newz(m, var, c, type)
#endif
/*
* In the following definition, the ", Nullop" is just to make the compiler
* think the expression is of the right type: croak actually does a Siglongjmp.
*/
#define CHECKOP(type,o) \
((PL_op_mask && PL_op_mask[type]) \
? ( op_free((OP*)o), \
Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]), \
Nullop ) \
: CALL_FPTR(PL_check[type])(aTHX_ (OP*)o))
#define PAD_MAX 999999999
STATIC char*
S_gv_ename(pTHX_ GV *gv)
{
STRLEN n_a;
SV* tmpsv = sv_newmortal();
gv_efullname3(tmpsv, gv, Nullch);
return SvPV(tmpsv,n_a);
}
STATIC OP *
S_no_fh_allowed(pTHX_ OP *o)
{
yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
PL_op_desc[o->op_type]));
return o;
}
STATIC OP *
S_too_few_arguments(pTHX_ OP *o, char *name)
{
yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
return o;
}
STATIC OP *
S_too_many_arguments(pTHX_ OP *o, char *name)
{
yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
return o;
}
STATIC void
S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
{
yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
(int)n, name, t, PL_op_desc[kid->op_type]));
}
STATIC void
S_no_bareword_allowed(pTHX_ OP *o)
{
qerror(Perl_mess(aTHX_
"Bareword \"%s\" not allowed while \"strict subs\" in use",
SvPV_nolen(cSVOPo_sv)));
}
/* "register" allocation */
PADOFFSET
Perl_pad_allocmy(pTHX_ char *name)
{
dTHR;
PADOFFSET off;
SV *sv;
if (!(PL_in_my == KEY_our ||
isALPHA(name[1]) ||
(PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
(name[1] == '_' && (int)strlen(name) > 2)))
{
if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
/* 1999-02-27 mjd@plover.com */
char *p;
p = strchr(name, '\0');
/* The next block assumes the buffer is at least 205 chars
long. At present, it's always at least 256 chars. */
if (p-name > 200) {
strcpy(name+200, "...");
p = name+199;
}
else {
p[1] = '\0';
}
/* Move everything else down one character */
for (; p-name > 2; p--)
*p = *(p-1);
name[2] = toCTRL(name[1]);
name[1] = '^';
}
yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
}
if (ckWARN(WARN_MISC) && AvFILLp(PL_comppad_name) >= 0) {
SV **svp = AvARRAY(PL_comppad_name);
HV *ourstash = (PL_curstash ? PL_curstash : PL_defstash);
PADOFFSET top = AvFILLp(PL_comppad_name);
for (off = top; off > PL_comppad_name_floor; off--) {
if ((sv = svp[off])
&& sv != &PL_sv_undef
&& (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
&& (PL_in_my != KEY_our
|| ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash))
&& strEQ(name, SvPVX(sv)))
{
Perl_warner(aTHX_ WARN_MISC,
"\"%s\" variable %s masks earlier declaration in same %s",
(PL_in_my == KEY_our ? "our" : "my"),
name,
(SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
--off;
break;
}
}
if (PL_in_my == KEY_our) {
do {
if ((sv = svp[off])
&& sv != &PL_sv_undef
&& ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash)
&& strEQ(name, SvPVX(sv)))
{
Perl_warner(aTHX_ WARN_MISC,
"\"our\" variable %s redeclared", name);
Perl_warner(aTHX_ WARN_MISC,
"\t(Did you mean \"local\" instead of \"our\"?)\n");
break;
}
} while ( off-- > 0 );
}
}
off = pad_alloc(OP_PADSV, SVs_PADMY);
sv = NEWSV(1102,0);
sv_upgrade(sv, SVt_PVNV);
sv_setpv(sv, name);
if (PL_in_my_stash) {
if (*name != '$')
yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"%s\"",
name, PL_in_my == KEY_our ? "our" : "my"));
SvOBJECT_on(sv);
(void)SvUPGRADE(sv, SVt_PVMG);
SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
PL_sv_objcount++;
}
if (PL_in_my == KEY_our) {
(void)SvUPGRADE(sv, SVt_PVGV);
GvSTASH(sv) = (HV*)SvREFCNT_inc(PL_curstash ? (SV*)PL_curstash : (SV*)PL_defstash);
SvFLAGS(sv) |= SVpad_OUR;
}
av_store(PL_comppad_name, off, sv);
SvNVX(sv) = (NV)PAD_MAX;
SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
if (!PL_min_intro_pending)
PL_min_intro_pending = off;
PL_max_intro_pending = off;
if (*name == '@')
av_store(PL_comppad, off, (SV*)newAV());
else if (*name == '%')
av_store(PL_comppad, off, (SV*)newHV());
SvPADMY_on(PL_curpad[off]);
return off;
}
STATIC PADOFFSET
S_pad_addlex(pTHX_ SV *proto_namesv)
{
SV *namesv = NEWSV(1103,0);
PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY);
sv_upgrade(namesv, SVt_PVNV);
sv_setpv(namesv, SvPVX(proto_namesv));
av_store(PL_comppad_name, newoff, namesv);
SvNVX(namesv) = (NV)PL_curcop->cop_seq;
SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
SvFAKE_on(namesv); /* A ref, not a real var */
if (SvFLAGS(proto_namesv) & SVpad_OUR) { /* An "our" variable */
SvFLAGS(namesv) |= SVpad_OUR;
(void)SvUPGRADE(namesv, SVt_PVGV);
GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)GvSTASH(proto_namesv));
}
if (SvOBJECT(proto_namesv)) { /* A typed var */
SvOBJECT_on(namesv);
(void)SvUPGRADE(namesv, SVt_PVMG);
SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(proto_namesv));
PL_sv_objcount++;
}
return newoff;
}
#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
STATIC PADOFFSET
S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
I32 cx_ix, I32 saweval, U32 flags)
{
dTHR;
CV *cv;
I32 off;
SV *sv;
register I32 i;
register PERL_CONTEXT *cx;
for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
AV *curlist = CvPADLIST(cv);
SV **svp = av_fetch(curlist, 0, FALSE);
AV *curname;
if (!svp || *svp == &PL_sv_undef)
continue;
curname = (AV*)*svp;
svp = AvARRAY(curname);
for (off = AvFILLp(curname); off > 0; off--) {
if ((sv = svp[off]) &&
sv != &PL_sv_undef &&
seq <= SvIVX(sv) &&
seq > I_32(SvNVX(sv)) &&
strEQ(SvPVX(sv), name))
{
I32 depth;
AV *oldpad;
SV *oldsv;
depth = CvDEPTH(cv);
if (!depth) {
if (newoff) {
if (SvFAKE(sv))
continue;
return 0; /* don't clone from inactive stack frame */
}
depth = 1;
}
oldpad = (AV*)AvARRAY(curlist)[depth];
oldsv = *av_fetch(oldpad, off, TRUE);
if (!newoff) { /* Not a mere clone operation. */
newoff = pad_addlex(sv);
if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
/* "It's closures all the way down." */
CvCLONE_on(PL_compcv);
if (cv == startcv) {
if (CvANON(PL_compcv))
oldsv = Nullsv; /* no need to keep ref */
}
else {
CV *bcv;
for (bcv = startcv;
bcv && bcv != cv && !CvCLONE(bcv);
bcv = CvOUTSIDE(bcv))
{
if (CvANON(bcv)) {
/* install the missing pad entry in intervening
* nested subs and mark them cloneable.
* XXX fix pad_foo() to not use globals */
AV *ocomppad_name = PL_comppad_name;
AV *ocomppad = PL_comppad;
SV **ocurpad = PL_curpad;
AV *padlist = CvPADLIST(bcv);
PL_comppad_name = (AV*)AvARRAY(padlist)[0];
PL_comppad = (AV*)AvARRAY(padlist)[1];
PL_curpad = AvARRAY(PL_comppad);
pad_addlex(sv);
PL_comppad_name = ocomppad_name;
PL_comppad = ocomppad;
PL_curpad = ocurpad;
CvCLONE_on(bcv);
}
else {
if (ckWARN(WARN_CLOSURE)
&& !CvUNIQUE(bcv) && !CvUNIQUE(cv))
{
Perl_warner(aTHX_ WARN_CLOSURE,
"Variable \"%s\" may be unavailable",
name);
}
break;
}
}
}
}
else if (!CvUNIQUE(PL_compcv)) {
if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
Perl_warner(aTHX_ WARN_CLOSURE,
"Variable \"%s\" will not stay shared", name);
}
}
av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
return newoff;
}
}
}
if (flags & FINDLEX_NOSEARCH)
return 0;
/* Nothing in current lexical context--try eval's context, if any.
* This is necessary to let the perldb get at lexically scoped variables.
* XXX This will also probably interact badly with eval tree caching.
*/
for (i = cx_ix; i >= 0; i--) {
cx = &cxstack[i];
switch (CxTYPE(cx)) {
default:
if (i == 0 && saweval) {
seq = cxstack[saweval].blk_oldcop->cop_seq;
return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
}
break;
case CXt_EVAL:
switch (cx->blk_eval.old_op_type) {
case OP_ENTEREVAL:
if (CxREALEVAL(cx))
saweval = i;
break;
case OP_DOFILE:
case OP_REQUIRE:
/* require/do must have their own scope */
return 0;
}
break;
case CXt_FORMAT:
case CXt_SUB:
if (!saweval)
return 0;
cv = cx->blk_sub.cv;
if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
saweval = i; /* so we know where we were called from */
continue;
}
seq = cxstack[saweval].blk_oldcop->cop_seq;
return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
}
}
return 0;
}
PADOFFSET
Perl_pad_findmy(pTHX_ char *name)
{
dTHR;
I32 off;
I32 pendoff = 0;
SV *sv;
SV **svp = AvARRAY(PL_comppad_name);
U32 seq = PL_cop_seqmax;
PERL_CONTEXT *cx;
CV *outside;
#ifdef USE_THREADS
/*
* Special case to get lexical (and hence per-thread) @_.
* XXX I need to find out how to tell at parse-time whether use
* of @_ should refer to a lexical (from a sub) or defgv (global
* scope and maybe weird sub-ish things like formats). See
* startsub in perly.y. It's possible that @_ could be lexical
* (at least from subs) even in non-threaded perl.
*/
if (strEQ(name, "@_"))
return 0; /* success. (NOT_IN_PAD indicates failure) */
#endif /* USE_THREADS */
/* The one we're looking for is probably just before comppad_name_fill. */
for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
if ((sv = svp[off]) &&
sv != &PL_sv_undef &&
(!SvIVX(sv) ||
(seq <= SvIVX(sv) &&
seq > I_32(SvNVX(sv)))) &&
strEQ(SvPVX(sv), name))
{
if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
return (PADOFFSET)off;
pendoff = off; /* this pending def. will override import */
}
}
outside = CvOUTSIDE(PL_compcv);
/* Check if if we're compiling an eval'', and adjust seq to be the
* eval's seq number. This depends on eval'' having a non-null
* CvOUTSIDE() while it is being compiled. The eval'' itself is
* identified by CvEVAL being true and CvGV being null. */
if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
cx = &cxstack[cxstack_ix];
if (CxREALEVAL(cx))
seq = cx->blk_oldcop->cop_seq;
}
/* See if it's in a nested scope */
off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
if (off) {
/* If there is a pending local definition, this new alias must die */
if (pendoff)
SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
return off; /* pad_findlex returns 0 for failure...*/
}
return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
}
void
Perl_pad_leavemy(pTHX_ I32 fill)
{
dTHR;
I32 off;
SV **svp = AvARRAY(PL_comppad_name);
SV *sv;
if (PL_min_intro_pending && fill < PL_min_intro_pending) {
for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
}
}
/* "Deintroduce" my variables that are leaving with this scope. */
for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
SvIVX(sv) = PL_cop_seqmax;
}
}
PADOFFSET
Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
{
dTHR;
SV *sv;
I32 retval;
if (AvARRAY(PL_comppad) != PL_curpad)
Perl_croak(aTHX_ "panic: pad_alloc");
if (PL_pad_reset_pending)
pad_reset();
if (tmptype & SVs_PADMY) {
do {
sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
} while (SvPADBUSY(sv)); /* need a fresh one */
retval = AvFILLp(PL_comppad);
}
else {
SV **names = AvARRAY(PL_comppad_name);
SSize_t names_fill = AvFILLp(PL_comppad_name);
for (;;) {
/*
* "foreach" index vars temporarily become aliases to non-"my"
* values. Thus we must skip, not just pad values that are
* marked as current pad values, but also those with names.
*/
if (++PL_padix <= names_fill &&
(sv = names[PL_padix]) && sv != &PL_sv_undef)
continue;
sv = *av_fetch(PL_comppad, PL_padix, TRUE);
if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) && !IS_PADGV(sv))
break;
}
retval = PL_padix;
}
SvFLAGS(sv) |= tmptype;
PL_curpad = AvARRAY(PL_comppad);
#ifdef USE_THREADS
DEBUG_X(PerlIO_printf(Perl_debug_log,
"0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
PTR2UV(thr), PTR2UV(PL_curpad),
(long) retval, PL_op_name[optype]));
#else
DEBUG_X(PerlIO_printf(Perl_debug_log,
"Pad 0x%"UVxf" alloc %ld for %s\n",
PTR2UV(PL_curpad),
(long) retval, PL_op_name[optype]));
#endif /* USE_THREADS */
return (PADOFFSET)retval;
}
SV *
Perl_pad_sv(pTHX_ PADOFFSET po)
{
dTHR;
#ifdef USE_THREADS
DEBUG_X(PerlIO_printf(Perl_debug_log,
"0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
#else
if (!po)
Perl_croak(aTHX_ "panic: pad_sv po");
DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
PTR2UV(PL_curpad), (IV)po));
#endif /* USE_THREADS */
return PL_curpad[po]; /* eventually we'll turn this into a macro */
}
void
Perl_pad_free(pTHX_ PADOFFSET po)
{
dTHR;
if (!PL_curpad)
return;
if (AvARRAY(PL_comppad) != PL_curpad)
Perl_croak(aTHX_ "panic: pad_free curpad");
if (!po)
Perl_croak(aTHX_ "panic: pad_free po");
#ifdef USE_THREADS
DEBUG_X(PerlIO_printf(Perl_debug_log,
"0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
#else
DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
PTR2UV(PL_curpad), (IV)po));
#endif /* USE_THREADS */
if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
SvPADTMP_off(PL_curpad[po]);
#ifdef USE_ITHREADS
SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
#endif
}
if ((I32)po < PL_padix)
PL_padix = po - 1;
}
void
Perl_pad_swipe(pTHX_ PADOFFSET po)
{
dTHR;
if (AvARRAY(PL_comppad) != PL_curpad)
Perl_croak(aTHX_ "panic: pad_swipe curpad");
if (!po)
Perl_croak(aTHX_ "panic: pad_swipe po");
#ifdef USE_THREADS
DEBUG_X(PerlIO_printf(Perl_debug_log,
"0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
#else
DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
PTR2UV(PL_curpad), (IV)po));
#endif /* USE_THREADS */
SvPADTMP_off(PL_curpad[po]);
PL_curpad[po] = NEWSV(1107,0);
SvPADTMP_on(PL_curpad[po]);
if ((I32)po < PL_padix)
PL_padix = po - 1;
}
/* XXX pad_reset() is currently disabled because it results in serious bugs.
* It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
* on the stack by OPs that use them, there are several ways to get an alias
* to a shared TARG. Such an alias will change randomly and unpredictably.
* We avoid doing this until we can think of a Better Way.
* GSAR 97-10-29 */
void
Perl_pad_reset(pTHX)
{
#ifdef USE_BROKEN_PAD_RESET
dTHR;
register I32 po;
if (AvARRAY(PL_comppad) != PL_curpad)
Perl_croak(aTHX_ "panic: pad_reset curpad");
#ifdef USE_THREADS
DEBUG_X(PerlIO_printf(Perl_debug_log,
"0x%"UVxf" Pad 0x%"UVxf" reset\n",
PTR2UV(thr), PTR2UV(PL_curpad)));
#else
DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
PTR2UV(PL_curpad)));
#endif /* USE_THREADS */
if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
SvPADTMP_off(PL_curpad[po]);
}
PL_padix = PL_padix_floor;
}
#endif
PL_pad_reset_pending = FALSE;
}
#ifdef USE_THREADS
/* find_threadsv is not reentrant */
PADOFFSET
Perl_find_threadsv(pTHX_ const char *name)
{
dTHR;
char *p;
PADOFFSET key;
SV **svp;
/* We currently only handle names of a single character */
p = strchr(PL_threadsv_names, *name);
if (!p)
return NOT_IN_PAD;
key = p - PL_threadsv_names;
MUTEX_LOCK(&thr->mutex);
svp = av_fetch(thr->threadsv, key, FALSE);
if (svp)
MUTEX_UNLOCK(&thr->mutex);
else {
SV *sv = NEWSV(0, 0);
av_store(thr->threadsv, key, sv);
thr->threadsvp = AvARRAY(thr->threadsv);
MUTEX_UNLOCK(&thr->mutex);
/*
* Some magic variables used to be automagically initialised
* in gv_fetchpv. Those which are now per-thread magicals get
* initialised here instead.
*/
switch (*name) {
case '_':
break;
case ';':
sv_setpv(sv, "\034");
sv_magic(sv, 0, 0, name, 1);
break;
case '&':
case '`':
case '\'':
PL_sawampersand = TRUE;
/* FALL THROUGH */
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
SvREADONLY_on(sv);
/* FALL THROUGH */
/* XXX %! tied to Errno.pm needs to be added here.
* See gv_fetchpv(). */
/* case '!': */
default:
sv_magic(sv, 0, 0, name, 1);
}
DEBUG_S(PerlIO_printf(Perl_error_log,
"find_threadsv: new SV %p for $%s%c\n",
sv, (*name < 32) ? "^" : "",
(*name < 32) ? toCTRL(*name) : *name));
}
return key;
}
#endif /* USE_THREADS */
/* Destructor */
void
Perl_op_free(pTHX_ OP *o)
{
register OP *kid, *nextkid;
OPCODE type;
if (!o || o->op_seq == (U16)-1)
return;
if (o->op_private & OPpREFCOUNTED) {
switch (o->op_type) {
case OP_LEAVESUB:
case OP_LEAVESUBLV:
case OP_LEAVEEVAL:
case OP_LEAVE:
case OP_SCOPE:
case OP_LEAVEWRITE:
OP_REFCNT_LOCK;
if (OpREFCNT_dec(o)) {
OP_REFCNT_UNLOCK;
return;
}
OP_REFCNT_UNLOCK;
break;
default:
break;
}
}
if (o->op_flags & OPf_KIDS) {
for (kid = cUNOPo->op_first; kid; kid = nextkid) {
nextkid = kid->op_sibling; /* Get before next freeing kid */
op_free(kid);
}
}
type = o->op_type;
if (type == OP_NULL)
type = o->op_targ;
/* COP* is not cleared by op_clear() so that we may track line
* numbers etc even after null() */
if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
cop_free((COP*)o);
op_clear(o);
#ifdef PL_OP_SLAB_ALLOC
if ((char *) o == PL_OpPtr)
{
}
#else
Safefree(o);
#endif
}
STATIC void
S_op_clear(pTHX_ OP *o)
{
switch (o->op_type) {
case OP_NULL: /* Was holding old type, if any. */
case OP_ENTEREVAL: /* Was holding hints. */
#ifdef USE_THREADS
case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
#endif
o->op_targ = 0;
break;
#ifdef USE_THREADS
case OP_ENTERITER:
if (!(o->op_flags & OPf_SPECIAL))
break;
/* FALL THROUGH */
#endif /* USE_THREADS */
default:
if (!(o->op_flags & OPf_REF)
|| (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
break;
/* FALL THROUGH */
case OP_GVSV:
case OP_GV:
case OP_AELEMFAST:
#ifdef USE_ITHREADS
if (cPADOPo->op_padix > 0) {
if (PL_curpad) {
GV *gv = cGVOPo_gv;
pad_swipe(cPADOPo->op_padix);
/* No GvIN_PAD_off(gv) here, because other references may still
* exist on the pad */
SvREFCNT_dec(gv);
}
cPADOPo->op_padix = 0;
}
#else
SvREFCNT_dec(cSVOPo->op_sv);
cSVOPo->op_sv = Nullsv;
#endif
break;
case OP_CONST:
SvREFCNT_dec(cSVOPo->op_sv);
cSVOPo->op_sv = Nullsv;
break;
case OP_GOTO:
case OP_NEXT:
case OP_LAST:
case OP_REDO:
if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
break;
/* FALL THROUGH */
case OP_TRANS:
if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
SvREFCNT_dec(cSVOPo->op_sv);
cSVOPo->op_sv = Nullsv;
}
else {
Safefree(cPVOPo->op_pv);
cPVOPo->op_pv = Nullch;
}
break;
case OP_SUBST:
op_free(cPMOPo->op_pmreplroot);
goto clear_pmop;
case OP_PUSHRE:
#ifdef USE_ITHREADS
if ((PADOFFSET)cPMOPo->op_pmreplroot) {
if (PL_curpad) {
GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
/* No GvIN_PAD_off(gv) here, because other references may still
* exist on the pad */
SvREFCNT_dec(gv);
}
}
#else
SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
#endif
/* FALL THROUGH */
case OP_MATCH:
case OP_QR:
clear_pmop:
cPMOPo->op_pmreplroot = Nullop;
ReREFCNT_dec(cPMOPo->op_pmregexp);
cPMOPo->op_pmregexp = (REGEXP*)NULL;
break;
}
if (o->op_targ > 0) {
pad_free(o->op_targ);
o->op_targ = 0;
}
}
STATIC void
S_cop_free(pTHX_ COP* cop)
{
Safefree(cop->cop_label);
#ifdef USE_ITHREADS
Safefree(CopFILE(cop)); /* XXXXX share in a pvtable? */
Safefree(CopSTASHPV(cop)); /* XXXXX share in a pvtable? */
#else
/* NOTE: COP.cop_stash is not refcounted */
SvREFCNT_dec(CopFILEGV(cop));
#endif
if (! specialWARN(cop->cop_warnings))
SvREFCNT_dec(cop->cop_warnings);
}
STATIC void
S_null(pTHX_ OP *o)
{
if (o->op_type == OP_NULL)
return;
op_clear(o);
o->op_targ = o->op_type;
o->op_type = OP_NULL;
o->op_ppaddr = PL_ppaddr[OP_NULL];
}
/* Contextualizers */
#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
OP *
Perl_linklist(pTHX_ OP *o)
{
register OP *kid;
if (o->op_next)
return o->op_next;
/* establish postfix order */
if (cUNOPo->op_first) {
o->op_next = LINKLIST(cUNOPo->op_first);
for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
if (kid->op_sibling)
kid->op_next = LINKLIST(kid->op_sibling);
else
kid->op_next = o;
}
}
else
o->op_next = o;
return o->op_next;
}
OP *
Perl_scalarkids(pTHX_ OP *o)
{
OP *kid;
if (o && o->op_flags & OPf_KIDS) {
for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
scalar(kid);
}
return o;
}
STATIC OP *
S_scalarboolean(pTHX_ OP *o)
{
if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
dTHR;
if (ckWARN(WARN_SYNTAX)) {
line_t oldline = CopLINE(PL_curcop);
if (PL_copline != NOLINE)
CopLINE_set(PL_curcop, PL_copline);
Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
CopLINE_set(PL_curcop, oldline);
}
}
return scalar(o);
}
OP *
Perl_scalar(pTHX_ OP *o)
{
OP *kid;
/* assumes no premature commitment */
if (!o || (o->op_flags & OPf_WANT) || PL_error_count
|| o->op_type == OP_RETURN)
{
return o;
}
o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
switch (o->op_type) {
case OP_REPEAT:
if (o->op_private & OPpREPEAT_DOLIST)
null(((LISTOP*)cBINOPo->op_first)->op_first);
scalar(cBINOPo->op_first);
break;
case OP_OR:
case OP_AND:
case OP_COND_EXPR:
for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
scalar(kid);
break;
case OP_SPLIT:
if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
if (!kPMOP->op_pmreplroot)
deprecate("implicit split to @_");
}
/* FALL THROUGH */
case OP_MATCH:
case OP_QR:
case OP_SUBST:
case OP_NULL:
default:
if (o->op_flags & OPf_KIDS) {
for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
scalar(kid);
}
break;
case OP_LEAVE:
case OP_LEAVETRY:
kid = cLISTOPo->op_first;
scalar(kid);
while ((kid = kid->op_sibling)) {
if (kid->op_sibling)
scalarvoid(kid);
else
scalar(kid);
}
WITH_THR(PL_curcop = &PL_compiling);
break;
case OP_SCOPE:
case OP_LINESEQ:
case OP_LIST:
for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
if (kid->op_sibling)
scalarvoid(kid);
else
scalar(kid);
}
WITH_THR(PL_curcop = &PL_compiling);
break;
}
return o;
}
OP *
Perl_scalarvoid(pTHX_ OP *o)
{
OP *kid;
char* useless = 0;
SV* sv;
U8 want;
if (o->op_type == OP_NEXTSTATE
|| o->op_type == OP_SETSTATE
|| o->op_type == OP_DBSTATE
|| (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
|| o->op_targ == OP_SETSTATE
|| o->op_targ == OP_DBSTATE)))
{
dTHR;
PL_curcop = (COP*)o; /* for warning below */
}
/* assumes no premature commitment */
want = o->op_flags & OPf_WANT;
if ((want && want != OPf_WANT_SCALAR) || PL_error_count
|| o->op_type == OP_RETURN)
{
return o;
}
if ((o->op_private & OPpTARGET_MY)
&& (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
{
return scalar(o); /* As if inside SASSIGN */
}
o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
switch (o->op_type) {
default:
if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
break;
/* FALL THROUGH */
case OP_REPEAT:
if (o->op_flags & OPf_STACKED)
break;
goto func_ops;
case OP_SUBSTR:
if (o->op_private == 4)
break;
/* FALL THROUGH */
case OP_GVSV:
case OP_WANTARRAY:
case OP_GV:
case OP_PADSV:
case OP_PADAV:
case OP_PADHV:
case OP_PADANY:
case OP_AV2ARYLEN:
case OP_REF:
case OP_REFGEN:
case OP_SREFGEN:
case OP_DEFINED:
case OP_HEX:
case OP_OCT:
case OP_LENGTH:
case OP_VEC:
case OP_INDEX:
case OP_RINDEX:
case OP_SPRINTF:
case OP_AELEM:
case OP_AELEMFAST:
case OP_ASLICE:
case OP_HELEM:
case OP_HSLICE:
case OP_UNPACK:
case OP_PACK:
case OP_JOIN:
case OP_LSLICE:
case OP_ANONLIST:
case OP_ANONHASH:
case OP_SORT:
case OP_REVERSE:
case OP_RANGE:
case OP_FLIP:
case OP_FLOP:
case OP_CALLER:
case OP_FILENO:
case OP_EOF:
case OP_TELL:
case OP_GETSOCKNAME:
case OP_GETPEERNAME:
case OP_READLINK:
case OP_TELLDIR:
case OP_GETPPID:
case OP_GETPGRP:
case OP_GETPRIORITY:
case OP_TIME:
case OP_TMS:
case OP_LOCALTIME:
case OP_GMTIME:
case OP_GHBYNAME:
case OP_GHBYADDR:
case OP_GHOSTENT:
case OP_GNBYNAME:
case OP_GNBYADDR:
case OP_GNETENT:
case OP_GPBYNAME:
case OP_GPBYNUMBER:
case OP_GPROTOENT:
case OP_GSBYNAME:
case OP_GSBYPORT:
case OP_GSERVENT:
case OP_GPWNAM:
case OP_GPWUID:
case OP_GGRNAM:
case OP_GGRGID:
case OP_GETLOGIN:
func_ops:
if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
useless = PL_op_desc[o->op_type];
break;
case OP_RV2GV:
case OP_RV2SV:
case OP_RV2AV:
case OP_RV2HV:
if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) &&
(!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
useless = "a variable";
break;
case OP_CONST:
sv = cSVOPo_sv;
if (cSVOPo->op_private & OPpCONST_STRICT)
no_bareword_allowed(o);
else {
dTHR;
if (ckWARN(WARN_VOID)) {
useless = "a constant";
if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
useless = 0;
else if (SvPOK(sv)) {
if (strnEQ(SvPVX(sv), "di", 2) ||
strnEQ(SvPVX(sv), "ds", 2) ||
strnEQ(SvPVX(sv), "ig", 2))
useless = 0;
}
}
}
null(o); /* don't execute or even remember it */
break;
case OP_POSTINC:
o->op_type = OP_PREINC; /* pre-increment is faster */
o->op_ppaddr = PL_ppaddr[OP_PREINC];
break;
case OP_POSTDEC:
o->op_type = OP_PREDEC; /* pre-decrement is faster */
o->op_ppaddr = PL_ppaddr[OP_PREDEC];
break;
case OP_OR:
case OP_AND:
case OP_COND_EXPR:
for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
scalarvoid(kid);
break;
case OP_NULL:
if (o->op_flags & OPf_STACKED)
break;
/* FALL THROUGH */
case OP_NEXTSTATE:
case OP_DBSTATE:
case OP_ENTERTRY:
case OP_ENTER:
case OP_SCALAR:
if (!(o->op_flags & OPf_KIDS))
break;
/* FALL THROUGH */
case OP_SCOPE:
case OP_LEAVE:
case OP_LEAVETRY:
case OP_LEAVELOOP:
case OP_LINESEQ:
case OP_LIST:
for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
scalarvoid(kid);
break;
case OP_ENTEREVAL:
scalarkids(o);
break;
case OP_REQUIRE:
/* all requires must return a boolean value */
o->op_flags &= ~OPf_WANT;
return scalar(o);
case OP_SPLIT:
if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
if (!kPMOP->op_pmreplroot)
deprecate("implicit split to @_");
}
break;
}
if (useless) {
dTHR;
if (ckWARN(WARN_VOID))
Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
}
return o;
}
OP *
Perl_listkids(pTHX_ OP *o)
{
OP *kid;
if (o && o->op_flags & OPf_KIDS) {
for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
list(kid);
}
return o;
}
OP *
Perl_list(pTHX_ OP *o)
{
OP *kid;
/* assumes no premature commitment */
if (!o || (o->op_flags & OPf_WANT) || PL_error_count
|| o->op_type == OP_RETURN)
{
return o;
}
if ((o->op_private & OPpTARGET_MY)
&& (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
{
return o; /* As if inside SASSIGN */
}
o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
switch (o->op_type) {
case OP_FLOP:
case OP_REPEAT:
list(cBINOPo->op_first);
break;
case OP_OR:
case OP_AND:
case OP_COND_EXPR:
for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
list(kid);
break;
default:
case OP_MATCH:
case OP_QR:
case OP_SUBST:
case OP_NULL:
if (!(o->op_flags & OPf_KIDS))
break;
if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
list(cBINOPo->op_first);
return gen_constant_list(o);
}
case OP_LIST:
listkids(o);
break;
case OP_LEAVE:
case OP_LEAVETRY:
kid = cLISTOPo->op_first;
list(kid);
while ((kid = kid->op_sibling)) {
if (kid->op_sibling)
scalarvoid(kid);
else
list(kid);
}
WITH_THR(PL_curcop = &PL_compiling);
break;
case OP_SCOPE:
case OP_LINESEQ:
for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
if (kid->op_sibling)
scalarvoid(kid);
else
list(kid);
}
WITH_THR(PL_curcop = &PL_compiling);
break;
case OP_REQUIRE:
/* all requires must return a boolean value */
o->op_flags &= ~OPf_WANT;
return scalar(o);
}
return o;
}
OP *
Perl_scalarseq(pTHX_ OP *o)
{
OP *kid;
if (o) {
if (o->op_type == OP_LINESEQ ||
o->op_type == OP_SCOPE ||
o->op_type == OP_LEAVE ||
o->op_type == OP_LEAVETRY)
{
dTHR;
for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
if (kid->op_sibling) {
scalarvoid(kid);
}
}
PL_curcop = &PL_compiling;
}
o->op_flags &= ~OPf_PARENS;
if (PL_hints & HINT_BLOCK_SCOPE)
o->op_flags |= OPf_PARENS;
}
else
o = newOP(OP_STUB, 0);
return o;
}
STATIC OP *
S_modkids(pTHX_ OP *o, I32 type)
{
OP *kid;
if (o && o->op_flags & OPf_KIDS) {
for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
mod(kid, type);
}
return o;
}
OP *
Perl_mod(pTHX_ OP *o, I32 type)
{
dTHR;
OP *kid;
STRLEN n_a;
if (!o || PL_error_count)
return o;
if ((o->op_private & OPpTARGET_MY)
&& (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
{
return o;
}
switch (o->op_type) {
case OP_UNDEF:
PL_modcount++;
return o;
case OP_CONST:
if (!(o->op_private & (OPpCONST_ARYBASE)))
goto nomod;
if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
PL_eval_start = 0;
}
else if (!type) {
SAVEI32(PL_compiling.cop_arybase);
PL_compiling.cop_arybase = 0;
}
else if (type == OP_REFGEN)
goto nomod;
else
Perl_croak(aTHX_ "That use of $[ is unsupported");
break;
case OP_STUB:
if (o->op_flags & OPf_PARENS)
break;
goto nomod;
case OP_ENTERSUB:
if ((type == OP_UNDEF || type == OP_REFGEN) &&
!(o->op_flags & OPf_STACKED)) {
o->op_type = OP_RV2CV; /* entersub => rv2cv */
o->op_ppaddr = PL_ppaddr[OP_RV2CV];
assert(cUNOPo->op_first->op_type == OP_NULL);
null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
break;
}
else { /* lvalue subroutine call */
o->op_private |= OPpLVAL_INTRO;
if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
/* Backward compatibility mode: */
o->op_private |= OPpENTERSUB_INARGS;
break;
}
else { /* Compile-time error message: */
OP *kid = cUNOPo->op_first;
CV *cv;
OP *okid;
if (kid->op_type == OP_PUSHMARK)
goto skip_kids;
if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
Perl_croak(aTHX_
"panic: unexpected lvalue entersub "
"args: type/targ %ld:%ld",
(long)kid->op_type,kid->op_targ);
kid = kLISTOP->op_first;
skip_kids:
while (kid->op_sibling)
kid = kid->op_sibling;
if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
/* Indirect call */
if (kid->op_type == OP_METHOD_NAMED
|| kid->op_type == OP_METHOD)
{
UNOP *newop;
if (kid->op_sibling || kid->op_next != kid) {
yyerror("panic: unexpected optree near method call");
break;
}
NewOp(1101, newop, 1, UNOP);
newop->op_type = OP_RV2CV;
newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
newop->op_first = Nullop;
newop->op_next = (OP*)newop;
kid->op_sibling = (OP*)newop;
newop->op_private |= OPpLVAL_INTRO;
break;
}
if (kid->op_type != OP_RV2CV)
Perl_croak(aTHX_
"panic: unexpected lvalue entersub "
"entry via type/targ %ld:%ld",
(long)kid->op_type,kid->op_targ);
kid->op_private |= OPpLVAL_INTRO;
break; /* Postpone until runtime */
}
okid = kid;
kid = kUNOP->op_first;
if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
kid = kUNOP->op_first;
if (kid->op_type == OP_NULL)
Perl_croak(aTHX_
"Unexpected constant lvalue entersub "
"entry via type/targ %ld:%ld",
(long)kid->op_type,kid->op_targ);
if (kid->op_type != OP_GV) {
/* Restore RV2CV to check lvalueness */
restore_2cv:
if (kid->op_next && kid->op_next != kid) { /* Happens? */
okid->op_next = kid->op_next;
kid->op_next = okid;
}
else
okid->op_next = Nullop;
okid->op_type = OP_RV2CV;
okid->op_targ = 0;
okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
okid->op_private |= OPpLVAL_INTRO;
break;
}
cv = GvCV(kGVOP_gv);
if (!cv)
goto restore_2cv;
if (CvLVALUE(cv))
break;
}
}
/* FALL THROUGH */
default:
nomod:
/* grep, foreach, subcalls, refgen */
if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
break;
yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
(o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
? "do block"
: (o->op_type == OP_ENTERSUB
? "non-lvalue subroutine call"
: PL_op_desc[o->op_type])),
type ? PL_op_desc[type] : "local"));
return o;
case OP_PREINC:
case OP_PREDEC:
case OP_POW:
case OP_MULTIPLY:
case OP_DIVIDE:
case OP_MODULO:
case OP_REPEAT:
case OP_ADD:
case OP_SUBTRACT:
case OP_CONCAT:
case OP_LEFT_SHIFT:
case OP_RIGHT_SHIFT:
case OP_BIT_AND:
case OP_BIT_XOR:
case OP_BIT_OR:
case OP_I_MULTIPLY:
case OP_I_DIVIDE:
case OP_I_MODULO:
case OP_I_ADD:
case OP_I_SUBTRACT:
if (!(o->op_flags & OPf_STACKED))
goto nomod;
PL_modcount++;
break;
case OP_COND_EXPR:
for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
mod(kid, type);
break;
case OP_RV2AV:
case OP_RV2HV:
if (!type && cUNOPo->op_first->op_type != OP_GV)
Perl_croak(aTHX_ "Can't localize through a reference");
if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
PL_modcount = 10000;
return o; /* Treat \(@foo) like ordinary list. */
}
/* FALL THROUGH */
case OP_RV2GV:
if (scalar_mod_type(o, type))
goto nomod;
ref(cUNOPo->op_first, o->op_type);
/* FALL THROUGH */
case OP_AASSIGN:
case OP_ASLICE:
case OP_HSLICE:
case OP_NEXTSTATE:
case OP_DBSTATE:
case OP_REFGEN:
case OP_CHOMP:
PL_modcount = 10000;
break;
case OP_RV2SV:
if (!type && cUNOPo->op_first->op_type != OP_GV)
Perl_croak(aTHX_ "Can't localize through a reference");
ref(cUNOPo->op_first, o->op_type);
/* FALL THROUGH */
case OP_GV:
case OP_AV2ARYLEN:
PL_hints |= HINT_BLOCK_SCOPE;
case OP_SASSIGN:
case OP_ANDASSIGN:
case OP_ORASSIGN:
case OP_AELEMFAST:
PL_modcount++;
break;
case OP_PADAV:
case OP_PADHV:
PL_modcount = 10000;
if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
return o; /* Treat \(@foo) like ordinary list. */
if (scalar_mod_type(o, type))
goto nomod;
/* FALL THROUGH */
case OP_PADSV:
PL_modcount++;
if (!type)
Perl_croak(aTHX_ "Can't localize lexical variable %s",
SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
break;
#ifdef USE_THREADS
case OP_THREADSV:
PL_modcount++; /* XXX ??? */
break;
#endif /* USE_THREADS */
case OP_PUSHMARK:
break;
case OP_KEYS:
if (type != OP_SASSIGN)
goto nomod;
goto lvalue_func;
case OP_SUBSTR:
if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
goto nomod;
/* FALL THROUGH */
case OP_POS:
case OP_VEC:
lvalue_func:
pad_free(o->op_targ);
o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
if (o->op_flags & OPf_KIDS)
mod(cBINOPo->op_first->op_sibling, type);
break;
case OP_AELEM:
case OP_HELEM:
ref(cBINOPo->op_first, o->op_type);
if (type == OP_ENTERSUB &&
!(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
o->op_private |= OPpLVAL_DEFER;
PL_modcount++;
break;
case OP_SCOPE:
case OP_LEAVE:
case OP_ENTER:
if (o->op_flags & OPf_KIDS)
mod(cLISTOPo->op_last, type);
break;
case OP_NULL:
if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
goto nomod;
else if (!(o->op_flags & OPf_KIDS))
break;
if (o->op_targ != OP_LIST) {
mod(cBINOPo->op_first, type);
break;
}
/* FALL THROUGH */
case OP_LIST:
for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
mod(kid, type);
break;
}
o->op_flags |= OPf_MOD;
if (type == OP_AASSIGN || type == OP_SASSIGN)
o->op_flags |= OPf_SPECIAL|OPf_REF;
else if (!type) {
o->op_private |= OPpLVAL_INTRO;
o->op_flags &= ~OPf_SPECIAL;
PL_hints |= HINT_BLOCK_SCOPE;
}
else if (type != OP_GREPSTART && type != OP_ENTERSUB)
o->op_flags |= OPf_REF;
return o;
}
STATIC bool
S_scalar_mod_type(pTHX_ OP *o, I32 type)
{
switch (type) {
case OP_SASSIGN:
if (o->op_type == OP_RV2GV)
return FALSE;
/* FALL THROUGH */
case OP_PREINC:
case OP_PREDEC:
case OP_POSTINC:
case OP_POSTDEC:
case OP_I_PREINC:
case OP_I_PREDEC:
case OP_I_POSTINC:
case OP_I_POSTDEC:
case OP_POW:
case OP_MULTIPLY:
case OP_DIVIDE:
case OP_MODULO:
case OP_REPEAT:
case OP_ADD:
case OP_SUBTRACT:
case OP_I_MULTIPLY:
case OP_I_DIVIDE:
case OP_I_MODULO:
case OP_I_ADD:
case OP_I_SUBTRACT:
case OP_LEFT_SHIFT:
case OP_RIGHT_SHIFT:
case OP_BIT_AND:
case OP_BIT_XOR:
case OP_BIT_OR:
case OP_CONCAT:
case OP_SUBST:
case OP_TRANS:
case OP_READ:
case OP_SYSREAD:
case OP_RECV:
case OP_ANDASSIGN:
case OP_ORASSIGN:
return TRUE;
default:
return FALSE;
}
}
STATIC bool
S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
{
switch (o->op_type) {
case OP_PIPE_OP:
case OP_SOCKPAIR:
if (argnum == 2)
return TRUE;
/* FALL THROUGH */
case OP_SYSOPEN:
case OP_OPEN:
case OP_SELECT: /* XXX c.f. SelectSaver.pm */
case OP_SOCKET:
case OP_OPEN_DIR:
case OP_ACCEPT:
if (argnum == 1)
return TRUE;
/* FALL THROUGH */
default:
return FALSE;
}
}
OP *
Perl_refkids(pTHX_ OP *o, I32 type)
{
OP *kid;
if (o && o->op_flags & OPf_KIDS) {
for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
ref(kid, type);
}
return o;
}
OP *
Perl_ref(pTHX_ OP *o, I32 type)
{
OP *kid;
if (!o || PL_error_count)
return o;
switch (o->op_type) {
case OP_ENTERSUB:
if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) &&
!(o->op_flags & OPf_STACKED)) {
o->op_type = OP_RV2CV; /* entersub => rv2cv */
o->op_ppaddr = PL_ppaddr[OP_RV2CV];
assert(cUNOPo->op_first->op_type == OP_NULL);
null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
o->op_flags |= OPf_SPECIAL;
}
break;
case OP_COND_EXPR:
for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
ref(kid, type);
break;
case OP_RV2SV:
if (type == OP_DEFINED)
o->op_flags |= OPf_SPECIAL; /* don't create GV */
ref(cUNOPo->op_first, o->op_type);
/* FALL THROUGH */
case OP_PADSV:
if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
: type == OP_RV2HV ? OPpDEREF_HV
: OPpDEREF_SV);
o->op_flags |= OPf_MOD;
}
break;
case OP_THREADSV:
o->op_flags |= OPf_MOD; /* XXX ??? */
break;
case OP_RV2AV:
case OP_RV2HV:
o->op_flags |= OPf_REF;
/* FALL THROUGH */
case OP_RV2GV:
if (type == OP_DEFINED)
o->op_flags |= OPf_SPECIAL; /* don't create GV */
ref(cUNOPo->op_first, o->op_type);
break;
case OP_PADAV:
case OP_PADHV:
o->op_flags |= OPf_REF;
break;
case OP_SCALAR:
case OP_NULL:
if (!(o->op_flags & OPf_KIDS))
break;
ref(cBINOPo->op_first, type);
break;
case OP_AELEM:
case OP_HELEM:
ref(cBINOPo->op_first, o->op_type);
if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
: type == OP_RV2HV ? OPpDEREF_HV
: OPpDEREF_SV);
o->op_flags |= OPf_MOD;
}
break;
case OP_SCOPE:
case OP_LEAVE:
case OP_ENTER:
case OP_LIST:
if (!(o->op_flags & OPf_KIDS))
break;
ref(cLISTOPo->op_last, type);
break;
default:
break;
}
return scalar(o);
}
STATIC OP *
S_dup_attrlist(pTHX_ OP *o)
{
OP *rop = Nullop;
/* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
* where the first kid is OP_PUSHMARK and the remaining ones
* are OP_CONST. We need to push the OP_CONST values.
*/
if (o->op_type == OP_CONST)
rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
else {
assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
if (o->op_type == OP_CONST)
rop = append_elem(OP_LIST, rop,
newSVOP(OP_CONST, o->op_flags,
SvREFCNT_inc(cSVOPo->op_sv)));
}
}
return rop;
}
STATIC void
S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
{
SV *stashsv;
/* fake up C<use attributes $pkg,$rv,@attrs> */
ENTER; /* need to protect against side-effects of 'use' */
SAVEINT(PL_expect);
if (stash && HvNAME(stash))
stashsv = newSVpv(HvNAME(stash), 0);
else
stashsv = &PL_sv_no;
#define ATTRSMODULE "attributes"
Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
Nullsv,
prepend_elem(OP_LIST,
newSVOP(OP_CONST, 0, stashsv),
prepend_elem(OP_LIST,
newSVOP(OP_CONST, 0,
newRV(target)),
dup_attrlist(attrs))));
LEAVE;
}
STATIC OP *
S_my_kid(pTHX_ OP *o, OP *attrs)
{
OP *kid;
I32 type;
if (!o || PL_error_count)
return o;
type = o->op_type;
if (type == OP_LIST) {
for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
my_kid(kid, attrs);
} else if (type == OP_UNDEF) {
return o;
} else if (type == OP_RV2SV || /* "our" declaration */
type == OP_RV2AV ||
type == OP_RV2HV) { /* XXX does this let anything illegal in? */
o->op_private |= OPpOUR_INTRO;
return o;
} else if (type != OP_PADSV &&
type != OP_PADAV &&
type != OP_PADHV &&
type != OP_PUSHMARK)
{
yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
PL_op_desc[o->op_type],
PL_in_my == KEY_our ? "our" : "my"));
return o;
}
else if (attrs && type != OP_PUSHMARK) {
HV *stash;
SV *padsv;
SV **namesvp;
PL_in_my = FALSE;
PL_in_my_stash = Nullhv;
/* check for C<my Dog $spot> when deciding package */
namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
stash = SvSTASH(*namesvp);
else
stash = PL_curstash;
padsv = PAD_SV(o->op_targ);
apply_attrs(stash, padsv, attrs);
}
o->op_flags |= OPf_MOD;
o->op_private |= OPpLVAL_INTRO;
return o;
}
OP *
Perl_my_attrs(pTHX_ OP *o, OP *attrs)
{
if (o->op_flags & OPf_PARENS)
list(o);
if (attrs)
SAVEFREEOP(attrs);
o = my_kid(o, attrs);
PL_in_my = FALSE;
PL_in_my_stash = Nullhv;
return o;
}
OP *
Perl_my(pTHX_ OP *o)
{
return my_kid(o, Nullop);
}
OP *
Perl_sawparens(pTHX_ OP *o)
{
if (o)
o->op_flags |= OPf_PARENS;
return o;
}
OP *
Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
{
dTHR;
OP *o;
if (ckWARN(WARN_MISC) &&
(left->op_type == OP_RV2AV ||
left->op_type == OP_RV2HV ||
left->op_type == OP_PADAV ||
left->op_type == OP_PADHV)) {
char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
right->op_type == OP_TRANS)
? right->op_type : OP_MATCH];
const char *sample = ((left->op_type == OP_RV2AV ||
left->op_type == OP_PADAV)
? "@array" : "%hash");
Perl_warner(aTHX_ WARN_MISC,
"Applying %s to %s will act on scalar(%s)",
desc, sample, sample);
}
if (right->op_type == OP_MATCH ||
right->op_type == OP_SUBST ||
right->op_type == OP_TRANS) {
right->op_flags |= OPf_STACKED;
if (right->op_type != OP_MATCH)
left = mod(left, right->op_type);
if (right->op_type == OP_TRANS)
o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
else
o = prepend_elem(right->op_type, scalar(left), right);
if (type == OP_NOT)
return newUNOP(OP_NOT, 0, scalar(o));
return o;
}
else
return bind_match(type, left,
pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
}
OP *
Perl_invert(pTHX_ OP *o)
{
if (!o)
return o;
/* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
}
OP *
Perl_scope(pTHX_ OP *o)
{
if (o) {
if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
o->op_type = OP_LEAVE;
o->op_ppaddr = PL_ppaddr[OP_LEAVE];
}
else {
if (o->op_type == OP_LINESEQ) {
OP *kid;
o->op_type = OP_SCOPE;
o->op_ppaddr = PL_ppaddr[OP_SCOPE];
kid = ((LISTOP*)o)->op_first;
if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
null(kid);
}
else
o = newLISTOP(OP_SCOPE, 0, o, Nullop);
}
}
return o;
}
void
Perl_save_hints(pTHX)
{
SAVEI32(PL_hints);
SAVESPTR(GvHV(PL_hintgv));
GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
SAVEFREESV(GvHV(PL_hintgv));
}
int
Perl_block_start(pTHX_ int full)
{
dTHR;
int retval = PL_savestack_ix;
SAVEI32(PL_comppad_name_floor);
PL_comppad_name_floor = AvFILLp(PL_comppad_name);
if (full)
PL_comppad_name_fill = PL_comppad_name_floor;
if (PL_comppad_name_floor < 0)
PL_comppad_name_floor = 0;
SAVEI32(PL_min_intro_pending);
SAVEI32(PL_max_intro_pending);
PL_min_intro_pending = 0;
SAVEI32(PL_comppad_name_fill);
SAVEI32(PL_padix_floor);
PL_padix_floor = PL_padix;
PL_pad_reset_pending = FALSE;
SAVEHINTS();
PL_hints &= ~HINT_BLOCK_SCOPE;
SAVESPTR(PL_compiling.cop_warnings);
if (! specialWARN(PL_compiling.cop_warnings)) {
PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
SAVEFREESV(PL_compiling.cop_warnings) ;
}
return retval;
}
OP*
Perl_block_end(pTHX_ I32 floor, OP *seq)
{
dTHR;
int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
OP* retval = scalarseq(seq);
LEAVE_SCOPE(floor);
PL_pad_reset_pending = FALSE;
PL_compiling.op_private = PL_hints;
if (needblockscope)
PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
pad_leavemy(PL_comppad_name_fill);
PL_cop_seqmax++;
return retval;
}
STATIC OP *
S_newDEFSVOP(pTHX)
{
#ifdef USE_THREADS
OP *o = newOP(OP_THREADSV, 0);
o->op_targ = find_threadsv("_");
return o;
#else
return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
#endif /* USE_THREADS */
}
void
Perl_newPROG(pTHX_ OP *o)
{
dTHR;
if (PL_in_eval) {
if (PL_eval_root)
return;
PL_eval_root = newUNOP(OP_LEAVEEVAL,
((PL_in_eval & EVAL_KEEPERR)
? OPf_SPECIAL : 0), o);
PL_eval_start = linklist(PL_eval_root);
PL_eval_root->op_private |= OPpREFCOUNTED;
OpREFCNT_set(PL_eval_root, 1);
PL_eval_root->op_next = 0;
peep(PL_eval_start);
}
else {
if (!o)
return;
PL_main_root = scope(sawparens(scalarvoid(o)));
PL_curcop = &PL_compiling;
PL_main_start = LINKLIST(PL_main_root);
PL_main_root->op_private |= OPpREFCOUNTED;
OpREFCNT_set(PL_main_root, 1);
PL_main_root->op_next = 0;
peep(PL_main_start);
PL_compcv = 0;
/* Register with debugger */
if (PERLDB_INTER) {
CV *cv = get_cv("DB::postponed", FALSE);
if (cv) {
dSP;
PUSHMARK(SP);
XPUSHs((SV*)CopFILEGV(&PL_compiling));
PUTBACK;
call_sv((SV*)cv, G_DISCARD);
}
}
}
}
OP *
Perl_localize(pTHX_ OP *o, I32 lex)
{
if (o->op_flags & OPf_PARENS)
list(o);
else {
dTHR;
if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
char *s;
for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
if (*s == ';' || *s == '=')
Perl_warner(aTHX_ WARN_PARENTHESIS,
"Parentheses missing around \"%s\" list",
lex ? (PL_in_my == KEY_our ? "our" : "my") : "local");
}
}
if (lex)
o = my(o);
else
o = mod(o, OP_NULL); /* a bit kludgey */
PL_in_my = FALSE;
PL_in_my_stash = Nullhv;
return o;
}
OP *
Perl_jmaybe(pTHX_ OP *o)
{
if (o->op_type == OP_LIST) {
OP *o2;
#ifdef USE_THREADS
o2 = newOP(OP_THREADSV, 0);
o2->op_targ = find_threadsv(";");
#else
o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
#endif /* USE_THREADS */
o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
}
return o;
}
OP *
Perl_fold_constants(pTHX_ register OP *o)
{
dTHR;
register OP *curop;
I32 type = o->op_type;
SV *sv;
if (PL_opargs[type] & OA_RETSCALAR)
scalar(o);
if (PL_opargs[type] & OA_TARGET && !o->op_targ)
o->op_targ = pad_alloc(type, SVs_PADTMP);
/* integerize op, unless it happens to be C<-foo>.
* XXX should pp_i_negate() do magic string negation instead? */
if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
&& !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
&& (cUNOPo->op_first->op_private & OPpCONST_BARE)))
{
o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
}
if (!(PL_opargs[type] & OA_FOLDCONST))
goto nope;
switch (type) {
case OP_NEGATE:
/* XXX might want a ck_negate() for this */
cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
break;
case OP_SPRINTF:
case OP_UCFIRST:
case OP_LCFIRST:
case OP_UC:
case OP_LC:
case OP_SLT:
case OP_SGT:
case OP_SLE:
case OP_SGE:
case OP_SCMP:
if (o->op_private & OPpLOCALE)
goto nope;
}
if (PL_error_count)
goto nope; /* Don't try to run w/ errors */
for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
if ((curop->op_type != OP_CONST ||
(curop->op_private & OPpCONST_BARE)) &&
curop->op_type != OP_LIST &&
curop->op_type != OP_SCALAR &&
curop->op_type != OP_NULL &&
curop->op_type != OP_PUSHMARK)
{
goto nope;
}
}
curop = LINKLIST(o);
o->op_next = 0;
PL_op = curop;
CALLRUNOPS(aTHX);
sv = *(PL_stack_sp--);
if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
pad_swipe(o->op_targ);
else if (SvTEMP(sv)) { /* grab mortal temp? */
(void)SvREFCNT_inc(sv);
SvTEMP_off(sv);
}
op_free(o);
if (type == OP_RV2GV)
return newGVOP(OP_GV, 0, (GV*)sv);
else {
/* try to smush double to int, but don't smush -2.0 to -2 */
if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
type != OP_NEGATE)
{
IV iv = SvIV(sv);
if ((NV)iv == SvNV(sv)) {
SvREFCNT_dec(sv);
sv = newSViv(iv);
}
else
SvIOK_off(sv); /* undo SvIV() damage */
}
return newSVOP(OP_CONST, 0, sv);
}
nope:
if (!(PL_opargs[type] & OA_OTHERINT))
return o;
if (!(PL_hints & HINT_INTEGER)) {
if (type == OP_MODULO
|| type == OP_DIVIDE
|| !(o->op_flags & OPf_KIDS))
{
return o;
}
for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
if (curop->op_type == OP_CONST) {
if (SvIOK(((SVOP*)curop)->op_sv))
continue;
return o;
}
if (PL_opargs[curop->op_type] & OA_RETINTEGER)
continue;
return o;
}
o->op_ppaddr = PL_ppaddr[++(o->op_type)];
}
return o;
}
OP *
Perl_gen_constant_list(pTHX_ register OP *o)
{
dTHR;
register OP *curop;
I32 oldtmps_floor = PL_tmps_floor;
list(o);
if (PL_error_count)
return o; /* Don't attempt to run with errors */
PL_op = curop = LINKLIST(o);
o->op_next = 0;
peep(curop);
pp_pushmark();
CALLRUNOPS(aTHX);
PL_op = curop;
pp_anonlist();
PL_tmps_floor = oldtmps_floor;
o->op_type = OP_RV2AV;
o->op_ppaddr = PL_ppaddr[OP_RV2AV];
curop = ((UNOP*)o)->op_first;
((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
op_free(curop);
linklist(o);
return list(o);
}
OP *
Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
{
OP *kid;
OP *last = 0;
if (!o || o->op_type != OP_LIST)
o = newLISTOP(OP_LIST, 0, o, Nullop);
else
o->op_flags &= ~OPf_WANT;
if (!(PL_opargs[type] & OA_MARK))
null(cLISTOPo->op_first);
o->op_type = type;
o->op_ppaddr = PL_ppaddr[type];
o->op_flags |= flags;
o = CHECKOP(type, o);
if (o->op_type != type)
return o;
if (cLISTOPo->op_children < 7) {
/* XXX do we really need to do this if we're done appending?? */
for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
last = kid;
cLISTOPo->op_last = last; /* in case check substituted last arg */
}
return fold_constants(o);
}
/* List constructors */
OP *
Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
{
if (!first)
return last;
if (!last)
return first;
if (first->op_type != type
|| (type == OP_LIST && (first->op_flags & OPf_PARENS)))
{
return newLISTOP(type, 0, first, last);
}
if (first->op_flags & OPf_KIDS)
((LISTOP*)first)->op_last->op_sibling = last;
else {
first->op_flags |= OPf_KIDS;
((LISTOP*)first)->op_first = last;
}
((LISTOP*)first)->op_last = last;
((LISTOP*)first)->op_children++;
return first;
}
OP *
Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
{
if (!first)
return (OP*)last;
if (!last)
return (OP*)first;
if (first->op_type != type)
return prepend_elem(type, (OP*)first, (OP*)last);
if (last->op_type != type)
return append_elem(type, (OP*)first, (OP*)last);
first->op_last->op_sibling = last->op_first;
first->op_last = last->op_last;
first->op_children += last->op_children;
if (first->op_children)
first->op_flags |= OPf_KIDS;
#ifdef PL_OP_SLAB_ALLOC
#else
Safefree(last);
#endif
return (OP*)first;
}
OP *
Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
{
if (!first)
return last;
if (!last)
return first;
if (last->op_type == type) {
if (type == OP_LIST) { /* already a PUSHMARK there */
first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
((LISTOP*)last)->op_first->op_sibling = first;
}
else {
if (!(last->op_flags & OPf_KIDS)) {
((LISTOP*)last)->op_last = first;
last->op_flags |= OPf_KIDS;
}
first->op_sibling = ((LISTOP*)last)->op_first;
((LISTOP*)last)->op_first = first;
}
((LISTOP*)last)->op_children++;
return last;
}
return newLISTOP(type, 0, first, last);
}
/* Constructors */
OP *
Perl_newNULLLIST(pTHX)
{
return newOP(OP_STUB, 0);
}
OP *
Perl_force_list(pTHX_ OP *o)
{
if (!o || o->op_type != OP_LIST)
o = newLISTOP(OP_LIST, 0, o, Nullop);
null(o);
return o;
}
OP *
Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
{
LISTOP *listop;
NewOp(1101, listop, 1, LISTOP);
listop->op_type = type;
listop->op_ppaddr = PL_ppaddr[type];
listop->op_children = (first != 0) + (last != 0);
listop->op_flags = flags;
if (!last && first)
last = first;
else if (!first && last)
first = last;
else if (first)
first->op_sibling = last;
listop->op_first = first;
listop->op_last = last;
if (type == OP_LIST) {
OP* pushop;
pushop = newOP(OP_PUSHMARK, 0);
pushop->op_sibling = first;
listop->op_first = pushop;
listop->op_flags |= OPf_KIDS;
if (!last)
listop->op_last = pushop;
}
else if (listop->op_children)
listop->op_flags |= OPf_KIDS;
return (OP*)listop;
}
OP *
Perl_newOP(pTHX_ I32 type, I32 flags)
{
OP *o;
NewOp(1101, o, 1, OP);
o->op_type = type;
o->op_ppaddr = PL_ppaddr[type];
o->op_flags = flags;
o->op_next = o;
o->op_private = 0 + (flags >> 8);
if (PL_opargs[type] & OA_RETSCALAR)
scalar(o);
if (PL_opargs[type] & OA_TARGET)
o->op_targ = pad_alloc(type, SVs_PADTMP);
return CHECKOP(type, o);
}
OP *
Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
{
UNOP *unop;
if (!first)
first = newOP(OP_STUB, 0);
if (PL_opargs[type] & OA_MARK)
first = force_list(first);
NewOp(1101, unop, 1, UNOP);
unop->op_type = type;
unop->op_ppaddr = PL_ppaddr[type];
unop->op_first = first;
unop->op_flags = flags | OPf_KIDS;
unop->op_private = 1 | (flags >> 8);
unop = (UNOP*) CHECKOP(type, unop);
if (unop->op_next)
return (OP*)unop;
return fold_constants((OP *) unop);
}
OP *
Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
{
BINOP *binop;
NewOp(1101, binop, 1, BINOP);
if (!first)
first = newOP(OP_NULL, 0);
binop->op_type = type;
binop->op_ppaddr = PL_ppaddr[type];
binop->op_first = first;
binop->op_flags = flags | OPf_KIDS;
if (!last) {
last = first;
binop->op_private = 1 | (flags >> 8);
}
else {
binop->op_private = 2 | (flags >> 8);
first->op_sibling = last;
}
binop = (BINOP*)CHECKOP(type, binop);
if (binop->op_next || binop->op_type != type)
return (OP*)binop;
binop->op_last = binop->op_first->op_sibling;
return fold_constants((OP *)binop);
}
static int
utf8compare(const void *a, const void *b)
{
int i;
for (i = 0; i < 10; i++) {
if ((*(U8**)a)[i] < (*(U8**)b)[i])
return -1;
if ((*(U8**)a)[i] > (*(U8**)b)[i])
return 1;
}
return 0;
}
OP *
Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
{
SV *tstr = ((SVOP*)expr)->op_sv;
SV *rstr = ((SVOP*)repl)->op_sv;
STRLEN tlen;
STRLEN rlen;
register U8 *t = (U8*)SvPV(tstr, tlen);
register U8 *r = (U8*)SvPV(rstr, rlen);
register I32 i;
register I32 j;
I32 del;
I32 complement;
I32 squash;
register short *tbl;
complement = o->op_private & OPpTRANS_COMPLEMENT;
del = o->op_private & OPpTRANS_DELETE;
squash = o->op_private & OPpTRANS_SQUASH;
if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
SV* listsv = newSVpvn("# comment\n",10);
SV* transv = 0;
U8* tend = t + tlen;
U8* rend = r + rlen;
I32 ulen;
U32 tfirst = 1;
U32 tlast = 0;
I32 tdiff;
U32 rfirst = 1;
U32 rlast = 0;
I32 rdiff;
I32 diff;
I32 none = 0;
U32 max = 0;
I32 bits;
I32 grows = 0;
I32 havefinal = 0;
U32 final;
I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
if (complement) {
U8 tmpbuf[UTF8_MAXLEN];
U8** cp;
UV nextmin = 0;
New(1109, cp, tlen, U8*);
i = 0;
transv = newSVpvn("",0);
while (t < tend) {
cp[i++] = t;
t += UTF8SKIP(t);
if (*t == 0xff) {
t++;
t += UTF8SKIP(t);
}
}
qsort(cp, i, sizeof(U8*), utf8compare);
for (j = 0; j < i; j++) {
U8 *s = cp[j];
UV val = utf8_to_uv(s, &ulen);
s += ulen;
diff = val - nextmin;
if (diff > 0) {
t = uv_to_utf8(tmpbuf,nextmin);
sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
if (diff > 1) {
t = uv_to_utf8(tmpbuf, val - 1);
sv_catpvn(transv, "\377", 1);
sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
}
}
if (*s == 0xff)
val = utf8_to_uv(s+1, &ulen);
if (val >= nextmin)
nextmin = val + 1;
}
t = uv_to_utf8(tmpbuf,nextmin);
sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
t = uv_to_utf8(tmpbuf, 0x7fffffff);
sv_catpvn(transv, "\377", 1);
sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
t = (U8*)SvPVX(transv);
tlen = SvCUR(transv);
tend = t + tlen;
}
else if (!rlen && !del) {
r = t; rlen = tlen; rend = tend;
}
if (!squash) {
if (to_utf && from_utf) { /* only counting characters */
if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
o->op_private |= OPpTRANS_IDENTICAL;
}
else { /* straight latin-1 translation */
if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
rlen == 4 && memEQ(r, "\0\377\303\277", 4))
o->op_private |= OPpTRANS_IDENTICAL;
}
}
while (t < tend || tfirst <= tlast) {
/* see if we need more "t" chars */
if (tfirst > tlast) {
tfirst = (I32)utf8_to_uv(t, &ulen);
t += ulen;
if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
tlast = (I32)utf8_to_uv(++t, &ulen);
t += ulen;
}
else
tlast = tfirst;
}
/* now see if we need more "r" chars */
if (rfirst > rlast) {
if (r < rend) {
rfirst = (I32)utf8_to_uv(r, &ulen);
r += ulen;
if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
rlast = (I32)utf8_to_uv(++r, &ulen);
r += ulen;
}
else
rlast = rfirst;
}
else {
if (!havefinal++)
final = rlast;
rfirst = rlast = 0xffffffff;
}
}
/* now see which range will peter our first, if either. */
tdiff = tlast - tfirst;
rdiff = rlast - rfirst;
if (tdiff <= rdiff)
diff = tdiff;
else
diff = rdiff;
if (rfirst == 0xffffffff) {
diff = tdiff; /* oops, pretend rdiff is infinite */
if (diff > 0)
Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n",
(long)tfirst, (long)tlast);
else
Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst);
}
else {
if (diff > 0)
Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n",
(long)tfirst, (long)(tfirst + diff),
(long)rfirst);
else
Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n",
(long)tfirst, (long)rfirst);
if (rfirst + diff > max)
max = rfirst + diff;
rfirst += diff + 1;
if (!grows) {
if (rfirst <= 0x80)
;
else if (rfirst <= 0x800)
grows |= (tfirst < 0x80);
else if (rfirst <= 0x10000)
grows |= (tfirst < 0x800);
else if (rfirst <= 0x200000)
grows |= (tfirst < 0x10000);
else if (rfirst <= 0x4000000)
grows |= (tfirst < 0x200000);
else if (rfirst <= 0x80000000)
grows |= (tfirst < 0x4000000);
}
}
tfirst += diff + 1;
}
none = ++max;
if (del)
del = ++max;
if (max > 0xffff)
bits = 32;
else if (max > 0xff)
bits = 16;
else
bits = 8;
cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
SvREFCNT_dec(listsv);
if (transv)
SvREFCNT_dec(transv);
if (!del && havefinal)
(void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5,
newSVuv((UV)final), 0);
if (grows && to_utf)
o->op_private |= OPpTRANS_GROWS;
op_free(expr);
op_free(repl);
return o;
}
tbl = (short*)cPVOPo->op_pv;
if (complement) {
Zero(tbl, 256, short);
for (i = 0; i < tlen; i++)
tbl[t[i]] = -1;
for (i = 0, j = 0; i < 256; i++) {
if (!tbl[i]) {
if (j >= rlen) {
if (del)
tbl[i] = -2;
else if (rlen)
tbl[i] = r[j-1];
else
tbl[i] = i;
}
else
tbl[i] = r[j++];
}
}
}
else {
if (!rlen && !del) {
r = t; rlen = tlen;
if (!squash)
o->op_private |= OPpTRANS_IDENTICAL;
}
for (i = 0; i < 256; i++)
tbl[i] = -1;
for (i = 0, j = 0; i < tlen; i++,j++) {
if (j >= rlen) {
if (del) {
if (tbl[t[i]] == -1)
tbl[t[i]] = -2;
continue;
}
--j;
}
if (tbl[t[i]] == -1)
tbl[t[i]] = r[j];
}
}
op_free(expr);
op_free(repl);
return o;
}
OP *
Perl_newPMOP(pTHX_ I32 type, I32 flags)
{
dTHR;
PMOP *pmop;
NewOp(1101, pmop, 1, PMOP);
pmop->op_type = type;
pmop->op_ppaddr = PL_ppaddr[type];
pmop->op_flags = flags;
pmop->op_private = 0 | (flags >> 8);
if (PL_hints & HINT_RE_TAINT)
pmop->op_pmpermflags |= PMf_RETAINT;
if (PL_hints & HINT_LOCALE)
pmop->op_pmpermflags |= PMf_LOCALE;
pmop->op_pmflags = pmop->op_pmpermflags;
/* link into pm list */
if (type != OP_TRANS && PL_curstash) {
pmop->op_pmnext = HvPMROOT(PL_curstash);
HvPMROOT(PL_curstash) = pmop;
}
return (OP*)pmop;
}
OP *
Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
{
dTHR;
PMOP *pm;
LOGOP *rcop;
I32 repl_has_vars = 0;
if (o->op_type == OP_TRANS)
return pmtrans(o, expr, repl);
PL_hints |= HINT_BLOCK_SCOPE;
pm = (PMOP*)o;
if (expr->op_type == OP_CONST) {
STRLEN plen;
SV *pat = ((SVOP*)expr)->op_sv;
char *p = SvPV(pat, plen);
if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
sv_setpvn(pat, "\\s+", 3);
p = SvPV(pat, plen);
pm->op_pmflags |= PMf_SKIPWHITE;
}
if ((PL_hints & HINT_UTF8) || (SvUTF8(pat) && !(PL_hints & HINT_BYTE)))
pm->op_pmdynflags |= PMdf_UTF8;
pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
if (strEQ("\\s+", pm->op_pmregexp->precomp))
pm->op_pmflags |= PMf_WHITE;
op_free(expr);
}
else {
if (PL_hints & HINT_UTF8)
pm->op_pmdynflags |= PMdf_UTF8;
if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
? OP_REGCRESET
: OP_REGCMAYBE),0,expr);
NewOp(1101, rcop, 1, LOGOP);
rcop->op_type = OP_REGCOMP;
rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
rcop->op_first = scalar(expr);
rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
? (OPf_SPECIAL | OPf_KIDS)
: OPf_KIDS);
rcop->op_private = 1;
rcop->op_other = o;
/* establish postfix order */
if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
LINKLIST(expr);
rcop->op_next = expr;
((UNOP*)expr)->op_first->op_next = (OP*)rcop;
}
else {
rcop->op_next = LINKLIST(expr);
expr->op_next = (OP*)rcop;
}
prepend_elem(o->op_type, scalar((OP*)rcop), o);
}
if (repl) {
OP *curop;
if (pm->op_pmflags & PMf_EVAL) {
curop = 0;
if (CopLINE(PL_curcop) < PL_multi_end)
CopLINE_set(PL_curcop, PL_multi_end);
}
#ifdef USE_THREADS
else if (repl->op_type == OP_THREADSV
&& strchr("&`'123456789+",
PL_threadsv_names[repl->op_targ]))
{
curop = 0;
}
#endif /* USE_THREADS */
else if (repl->op_type == OP_CONST)
curop = repl;
else {
OP *lastop = 0;
for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
#ifdef USE_THREADS
if (curop->op_type == OP_THREADSV) {
repl_has_vars = 1;
if (strchr("&`'123456789+", curop->op_private))
break;
}
#else
if (curop->op_type == OP_GV) {
GV *gv = cGVOPx_gv(curop);
repl_has_vars = 1;
if (strchr("&`'123456789+", *GvENAME(gv)))
break;
}
#endif /* USE_THREADS */
else if (curop->op_type == OP_RV2CV)
break;
else if (curop->op_type == OP_RV2SV ||
curop->op_type == OP_RV2AV ||
curop->op_type == OP_RV2HV ||
curop->op_type == OP_RV2GV) {
if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
break;
}
else if (curop->op_type == OP_PADSV ||
curop->op_type == OP_PADAV ||
curop->op_type == OP_PADHV ||
curop->op_type == OP_PADANY) {
repl_has_vars = 1;
}
else if (curop->op_type == OP_PUSHRE)
; /* Okay here, dangerous in newASSIGNOP */
else
break;
}
lastop = curop;
}
}
if (curop == repl
&& !(repl_has_vars
&& (!pm->op_pmregexp
|| pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
pm->op_pmflags |= PMf_CONST; /* const for long enough */
pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
prepend_elem(o->op_type, scalar(repl), o);
}
else {
if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
pm->op_pmflags |= PMf_MAYBE_CONST;
pm->op_pmpermflags |= PMf_MAYBE_CONST;
}
NewOp(1101, rcop, 1, LOGOP);
rcop->op_type = OP_SUBSTCONT;
rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
rcop->op_first = scalar(repl);
rcop->op_flags |= OPf_KIDS;
rcop->op_private = 1;
rcop->op_other = o;
/* establish postfix order */
rcop->op_next = LINKLIST(repl);
repl->op_next = (OP*)rcop;
pm->op_pmreplroot = scalar((OP*)rcop);
pm->op_pmreplstart = LINKLIST(rcop);
rcop->op_next = 0;
}
}
return (OP*)pm;
}
OP *
Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
{
SVOP *svop;
NewOp(1101, svop, 1, SVOP);
svop->op_type = type;
svop->op_ppaddr = PL_ppaddr[type];
svop->op_sv = sv;
svop->op_next = (OP*)svop;
svop->op_flags = flags;
if (PL_opargs[type] & OA_RETSCALAR)
scalar((OP*)svop);
if (PL_opargs[type] & OA_TARGET)
svop->op_targ = pad_alloc(type, SVs_PADTMP);
return CHECKOP(type, svop);
}
OP *
Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
{
PADOP *padop;
NewOp(1101, padop, 1, PADOP);
padop->op_type = type;
padop->op_ppaddr = PL_ppaddr[type];
padop->op_padix = pad_alloc(type, SVs_PADTMP);
SvREFCNT_dec(PL_curpad[padop->op_padix]);
PL_curpad[padop->op_padix] = sv;
SvPADTMP_on(sv);
padop->op_next = (OP*)padop;
padop->op_flags = flags;
if (PL_opargs[type] & OA_RETSCALAR)
scalar((OP*)padop);
if (PL_opargs[type] & OA_TARGET)
padop->op_targ = pad_alloc(type, SVs_PADTMP);
return CHECKOP(type, padop);
}
OP *
Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
{
dTHR;
#ifdef USE_ITHREADS
GvIN_PAD_on(gv);
return newPADOP(type, flags, SvREFCNT_inc(gv));
#else
return newSVOP(type, flags, SvREFCNT_inc(gv));
#endif
}
OP *
Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
{
PVOP *pvop;
NewOp(1101, pvop, 1, PVOP);
pvop->op_type = type;
pvop->op_ppaddr = PL_ppaddr[type];
pvop->op_pv = pv;
pvop->op_next = (OP*)pvop;
pvop->op_flags = flags;
if (PL_opargs[type] & OA_RETSCALAR)
scalar((OP*)pvop);
if (PL_opargs[type] & OA_TARGET)
pvop->op_targ = pad_alloc(type, SVs_PADTMP);
return CHECKOP(type, pvop);
}
void
Perl_package(pTHX_ OP *o)
{
dTHR;
SV *sv;
save_hptr(&PL_curstash);
save_item(PL_curstname);
if (o) {
STRLEN len;
char *name;
sv = cSVOPo->op_sv;
name = SvPV(sv, len);
PL_curstash = gv_stashpvn(name,len,TRUE);
sv_setpvn(PL_curstname, name, len);
op_free(o);
}
else {
sv_setpv(PL_curstname,"<none>");
PL_curstash = Nullhv;
}
PL_hints |= HINT_BLOCK_SCOPE;
PL_copline = NOLINE;
PL_expect = XSTATE;
}
void
Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
{
OP *pack;
OP *rqop;
OP *imop;
OP *veop;
GV *gv;
if (id->op_type != OP_CONST)
Perl_croak(aTHX_ "Module name must be constant");
veop = Nullop;
if (version != Nullop) {
SV *vesv = ((SVOP*)version)->op_sv;
if (arg == Nullop && !SvNIOKp(vesv)) {
arg = version;
}
else {
OP *pack;
SV *meth;
if (version->op_type != OP_CONST || !SvNIOKp(vesv))
Perl_croak(aTHX_ "Version number must be constant number");
/* Make copy of id so we don't free it twice */
pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
/* Fake up a method call to VERSION */
meth = newSVpvn("VERSION",7);
sv_upgrade(meth, SVt_PVIV);
(void)SvIOK_on(meth);
PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
append_elem(OP_LIST,
prepend_elem(OP_LIST, pack, list(version)),
newSVOP(OP_METHOD_NAMED, 0, meth)));
}
}
/* Fake up an import/unimport */
if (arg && arg->op_type == OP_STUB)
imop = arg; /* no import on explicit () */
else if (SvNIOKp(((SVOP*)id)->op_sv)) {
imop = Nullop; /* use 5.0; */
}
else {
SV *meth;
/* Make copy of id so we don't free it twice */
pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
/* Fake up a method call to import/unimport */
meth = aver ? newSVpvn("import",6) : newSVpvn("unimport", 8);;
sv_upgrade(meth, SVt_PVIV);
(void)SvIOK_on(meth);
PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
append_elem(OP_LIST,
prepend_elem(OP_LIST, pack, list(arg)),
newSVOP(OP_METHOD_NAMED, 0, meth)));
}
/* Fake up a require, handle override, if any */
gv = gv_fetchpv("require", FALSE, SVt_PVCV);
if (!(gv && GvIMPORTED_CV(gv)))
gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
if (gv && GvIMPORTED_CV(gv)) {
rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
append_elem(OP_LIST, id,
scalar(newUNOP(OP_RV2CV, 0,
newGVOP(OP_GV, 0,
gv))))));
}
else {
rqop = newUNOP(OP_REQUIRE, 0, id);
}
/* Fake up the BEGIN {}, which does its thing immediately. */
newATTRSUB(floor,
newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
Nullop,
Nullop,
append_elem(OP_LINESEQ,
append_elem(OP_LINESEQ,
newSTATEOP(0, Nullch, rqop),
newSTATEOP(0, Nullch, veop)),
newSTATEOP(0, Nullch, imop) ));
PL_hints |= HINT_BLOCK_SCOPE;
PL_copline = NOLINE;
PL_expect = XSTATE;
}
void
Perl_load_module(pTHX_ U32 flags, SV *name, SV *ver, ...)
{
va_list args;
va_start(args, ver);
vload_module(flags, name, ver, &args);
va_end(args);
}
#ifdef PERL_IMPLICIT_CONTEXT
void
Perl_load_module_nocontext(U32 flags, SV *name, SV *ver, ...)
{
dTHX;
va_list args;
va_start(args, ver);
vload_module(flags, name, ver, &args);
va_end(args);
}
#endif
void
Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args)
{
OP *modname, *veop, *imop;
modname = newSVOP(OP_CONST, 0, name);
modname->op_private |= OPpCONST_BARE;
if (ver) {
veop = newSVOP(OP_CONST, 0, ver);
}
else
veop = Nullop;
if (flags & PERL_LOADMOD_NOIMPORT) {
imop = sawparens(newNULLLIST());
}
else if (flags & PERL_LOADMOD_IMPORT_OPS) {
imop = va_arg(*args, OP*);
}
else {
SV *sv;
imop = Nullop;
sv = va_arg(*args, SV*);
while (sv) {
imop = append_elem(OP_LIST, imop, newSVOP(OP_CONST, 0, sv));
sv = va_arg(*args, SV*);
}
}
utilize(!(flags & PERL_LOADMOD_DENY), start_subparse(FALSE, 0),
veop, modname, imop);
}
OP *
Perl_dofile(pTHX_ OP *term)
{
OP *doop;
GV *gv;
gv = gv_fetchpv("do", FALSE, SVt_PVCV);
if (!(gv && GvIMPORTED_CV(gv)))
gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
if (gv && GvIMPORTED_CV(gv)) {
doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
append_elem(OP_LIST, term,
scalar(newUNOP(OP_RV2CV, 0,
newGVOP(OP_GV, 0,
gv))))));
}
else {
doop = newUNOP(OP_DOFILE, 0, scalar(term));
}
return doop;
}
OP *
Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
{
return newBINOP(OP_LSLICE, flags,
list(force_list(subscript)),
list(force_list(listval)) );
}
STATIC I32
S_list_assignment(pTHX_ register OP *o)
{
if (!o)
return TRUE;
if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
o = cUNOPo->op_first;
if (o->op_type == OP_COND_EXPR) {
I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
if (t && f)
return TRUE;
if (t || f)
yyerror("Assignment to both a list and a scalar");
return FALSE;
}
if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
return TRUE;
if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
return TRUE;
if (o->op_type == OP_RV2SV)
return FALSE;
return FALSE;
}
OP *
Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
{
OP *o;
if (optype) {
if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
return newLOGOP(optype, 0,
mod(scalar(left), optype),
newUNOP(OP_SASSIGN, 0, scalar(right)));
}
else {
return newBINOP(optype, OPf_STACKED,
mod(scalar(left), optype), scalar(right));
}
}
if (list_assignment(left)) {
dTHR;
OP *curop;
PL_modcount = 0;
PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
left = mod(left, OP_AASSIGN);
if (PL_eval_start)
PL_eval_start = 0;
else {
op_free(left);
op_free(right);
return Nullop;
}
curop = list(force_list(left));
o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop);
o->op_private = 0 | (flags >> 8);
for (curop = ((LISTOP*)curop)->op_first;
curop; curop = curop->op_sibling)
{
if (curop->op_type == OP_RV2HV &&
((UNOP*)curop)->op_first->op_type != OP_GV) {
o->op_private |= OPpASSIGN_HASH;
break;
}
}
if (!(left->op_private & OPpLVAL_INTRO)) {
OP *lastop = o;
PL_generation++;
for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
if (curop->op_type == OP_GV) {
GV *gv = cGVOPx_gv(curop);
if (gv == PL_defgv || SvCUR(gv) == PL_generation)
break;
SvCUR(gv) = PL_generation;
}
else if (curop->op_type == OP_PADSV ||
curop->op_type == OP_PADAV ||
curop->op_type == OP_PADHV ||
curop->op_type == OP_PADANY) {
SV **svp = AvARRAY(PL_comppad_name);
SV *sv = svp[curop->op_targ];
if (SvCUR(sv) == PL_generation)
break;
SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
}
else if (curop->op_type == OP_RV2CV)
break;
else if (curop->op_type == OP_RV2SV ||
curop->op_type == OP_RV2AV ||
curop->op_type == OP_RV2HV ||
curop->op_type == OP_RV2GV) {
if (lastop->op_type != OP_GV) /* funny deref? */
break;
}
else if (curop->op_type == OP_PUSHRE) {
if (((PMOP*)curop)->op_pmreplroot) {
GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
if (gv == PL_defgv || SvCUR(gv) == PL_generation)
break;
SvCUR(gv) = PL_generation;
}
}
else
break;
}
lastop = curop;
}
if (curop != o)
o->op_private |= OPpASSIGN_COMMON;
}
if (right && right->op_type == OP_SPLIT) {
OP* tmpop;
if ((tmpop = ((LISTOP*)right)->op_first) &&
tmpop->op_type == OP_PUSHRE)
{
PMOP *pm = (PMOP*)tmpop;
if (left->op_type == OP_RV2AV &&
!(left->op_private & OPpLVAL_INTRO) &&
!(o->op_private & OPpASSIGN_COMMON) )
{
tmpop = ((UNOP*)left)->op_first;
if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
#ifdef USE_ITHREADS
pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
cPADOPx(tmpop)->op_padix = 0; /* steal it */
#else
pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
#endif
pm->op_pmflags |= PMf_ONCE;
tmpop = cUNOPo->op_first; /* to list (nulled) */
tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
tmpop->op_sibling = Nullop; /* don't free split */
right->op_next = tmpop->op_next; /* fix starting loc */
op_free(o); /* blow off assign */
right->op_flags &= ~OPf_WANT;
/* "I don't know and I don't care." */
return right;
}
}
else {
if (PL_modcount < 10000 &&
((LISTOP*)right)->op_last->op_type == OP_CONST)
{
SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
if (SvIVX(sv) == 0)
sv_setiv(sv, PL_modcount+1);
}
}
}
}
return o;
}
if (!right)
right = newOP(OP_UNDEF, 0);
if (right->op_type == OP_READLINE) {
right->op_flags |= OPf_STACKED;
return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
}
else {
PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
o = newBINOP(OP_SASSIGN, flags,
scalar(right), mod(scalar(left), OP_SASSIGN) );
if (PL_eval_start)
PL_eval_start = 0;
else {
op_free(o);
return Nullop;
}
}
return o;
}
OP *
Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
{
dTHR;
U32 seq = intro_my();
register COP *cop;
NewOp(1101, cop, 1, COP);
if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
cop->op_type = OP_DBSTATE;
cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
}
else {
cop->op_type = OP_NEXTSTATE;
cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
}
cop->op_flags = flags;
cop->op_private = (PL_hints & HINT_BYTE);
#ifdef NATIVE_HINTS
cop->op_private |= NATIVE_HINTS;
#endif
PL_compiling.op_private = cop->op_private;
cop->op_next = (OP*)cop;
if (label) {
cop->cop_label = label;
PL_hints |= HINT_BLOCK_SCOPE;
}
cop->cop_seq = seq;
cop->cop_arybase = PL_curcop->cop_arybase;
if (specialWARN(PL_curcop->cop_warnings))
cop->cop_warnings = PL_curcop->cop_warnings ;
else
cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
if (PL_copline == NOLINE)
CopLINE_set(cop, CopLINE(PL_curcop));
else {
CopLINE_set(cop, PL_copline);
PL_copline = NOLINE;
}
#ifdef USE_ITHREADS
CopFILE_set(cop, CopFILE(PL_curcop)); /* XXXXX share in a pvtable? */
#else
CopFILEGV_set(cop, (GV*)SvREFCNT_inc(CopFILEGV(PL_curcop)));
#endif
CopSTASH_set(cop, PL_curstash);
if (PERLDB_LINE && PL_curstash != PL_debstash) {
SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
(void)SvIOK_on(*svp);
SvIVX(*svp) = PTR2IV(cop);
}
}
return prepend_elem(OP_LINESEQ, (OP*)cop, o);
}
/* "Introduce" my variables to visible status. */
U32
Perl_intro_my(pTHX)
{
SV **svp;
SV *sv;
I32 i;
if (! PL_min_intro_pending)
return PL_cop_seqmax;
svp = AvARRAY(PL_comppad_name);
for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
SvNVX(sv) = (NV)PL_cop_seqmax;
}
}
PL_min_intro_pending = 0;
PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
return PL_cop_seqmax++;
}
OP *
Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
{
return new_logop(type, flags, &first, &other);
}
STATIC OP *
S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
{
dTHR;
LOGOP *logop;
OP *o;
OP *first = *firstp;
OP *other = *otherp;
if (type == OP_XOR) /* Not short circuit, but here by precedence. */
return newBINOP(type, flags, scalar(first), scalar(other));
scalarboolean(first);
/* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
if (type == OP_AND || type == OP_OR) {
if (type == OP_AND)
type = OP_OR;
else
type = OP_AND;
o = first;
first = *firstp = cUNOPo->op_first;
if (o->op_next)
first->op_next = o->op_next;
cUNOPo->op_first = Nullop;
op_free(o);
}
}
if (first->op_type == OP_CONST) {
if (ckWARN(WARN_BAREWORD) && (first->op_private & OPpCONST_BARE))
Perl_warner(aTHX_ WARN_BAREWORD, "Bareword found in conditional");
if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
op_free(first);
*firstp = Nullop;
return other;
}
else {
op_free(other);
*otherp = Nullop;
return first;
}
}
else if (first->op_type == OP_WANTARRAY) {
if (type == OP_AND)
list(other);
else
scalar(other);
}
else if (ckWARN(WARN_MISC) && (first->op_flags & OPf_KIDS)) {
OP *k1 = ((UNOP*)first)->op_first;
OP *k2 = k1->op_sibling;
OPCODE warnop = 0;
switch (first->op_type)
{
case OP_NULL:
if (k2 && k2->op_type == OP_READLINE
&& (k2->op_flags & OPf_STACKED)
&& ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
{
warnop = k2->op_type;
}
break;
case OP_SASSIGN:
if (k1->op_type == OP_READDIR
|| k1->op_type == OP_GLOB
|| (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
|| k1->op_type == OP_EACH)
{
warnop = ((k1->op_type == OP_NULL)
? k1->op_targ : k1->op_type);
}
break;
}
if (warnop) {
line_t oldline = CopLINE(PL_curcop);
CopLINE_set(PL_curcop, PL_copline);
Perl_warner(aTHX_ WARN_MISC,
"Value of %s%s can be \"0\"; test with defined()",
PL_op_desc[warnop],
((warnop == OP_READLINE || warnop == OP_GLOB)
? " construct" : "() operator"));
CopLINE_set(PL_curcop, oldline);
}
}
if (!other)
return first;
if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
NewOp(1101, logop, 1, LOGOP);
logop->op_type = type;
logop->op_ppaddr = PL_ppaddr[type];
logop->op_first = first;
logop->op_flags = flags | OPf_KIDS;
logop->op_other = LINKLIST(other);
logop->op_private = 1 | (flags >> 8);
/* establish postfix order */
logop->op_next = LINKLIST(first);
first->op_next = (OP*)logop;
first->op_sibling = other;
o = newUNOP(OP_NULL, 0, (OP*)logop);
other->op_next = o;
return o;
}
OP *
Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
{
dTHR;
LOGOP *logop;
OP *start;
OP *o;
if (!falseop)
return newLOGOP(OP_AND, 0, first, trueop);
if (!trueop)
return newLOGOP(OP_OR, 0, first, falseop);
scalarboolean(first);
if (first->op_type == OP_CONST) {
if (SvTRUE(((SVOP*)first)->op_sv)) {
op_free(first);
op_free(falseop);
return trueop;
}
else {
op_free(first);
op_free(trueop);
return falseop;
}
}
else if (first->op_type == OP_WANTARRAY) {
list(trueop);
scalar(falseop);
}
NewOp(1101, logop, 1, LOGOP);
logop->op_type = OP_COND_EXPR;
logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
logop->op_first = first;
logop->op_flags = flags | OPf_KIDS;
logop->op_private = 1 | (flags >> 8);
logop->op_other = LINKLIST(trueop);
logop->op_next = LINKLIST(falseop);
/* establish postfix order */
start = LINKLIST(first);
first->op_next = (OP*)logop;
first->op_sibling = trueop;
trueop->op_sibling = falseop;
o = newUNOP(OP_NULL, 0, (OP*)logop);
trueop->op_next = falseop->op_next = o;
o->op_next = start;
return o;
}
OP *
Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
{
dTHR;
LOGOP *range;
OP *flip;
OP *flop;
OP *leftstart;
OP *o;
NewOp(1101, range, 1, LOGOP);
range->op_type = OP_RANGE;
range->op_ppaddr = PL_ppaddr[OP_RANGE];
range->op_first = left;
range->op_flags = OPf_KIDS;
leftstart = LINKLIST(left);
range->op_other = LINKLIST(right);
range->op_private = 1 | (flags >> 8);
left->op_sibling = right;
range->op_next = (OP*)range;
flip = newUNOP(OP_FLIP, flags, (OP*)range);
flop = newUNOP(OP_FLOP, 0, flip);
o = newUNOP(OP_NULL, 0, flop);
linklist(flop);
range->op_next = leftstart;
left->op_next = flip;
right->op_next = flop;
range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
flip->op_next = o;
if (!flip->op_private || !flop->op_private)
linklist(o); /* blow off optimizer unless constant */
return o;
}
OP *
Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
{
dTHR;
OP* listop;
OP* o;
int once = block && block->op_flags & OPf_SPECIAL &&
(block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
if (expr) {
if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
return block; /* do {} while 0 does once */
if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
|| (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
expr = newUNOP(OP_DEFINED, 0,
newASSIGNOP(0, newDEFSVOP(), 0, expr) );
} else if (expr->op_flags & OPf_KIDS) {
OP *k1 = ((UNOP*)expr)->op_first;
OP *k2 = (k1) ? k1->op_sibling : NULL;
switch (expr->op_type) {
case OP_NULL:
if (k2 && k2->op_type == OP_READLINE
&& (k2->op_flags & OPf_STACKED)
&& ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
expr = newUNOP(OP_DEFINED, 0, expr);
break;
case OP_SASSIGN:
if (k1->op_type == OP_READDIR
|| k1->op_type == OP_GLOB
|| (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
|| k1->op_type == OP_EACH)
expr = newUNOP(OP_DEFINED, 0, expr);
break;
}
}
}
listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
o = new_logop(OP_AND, 0, &expr, &listop);
if (listop)
((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
if (once && o != listop)
o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
if (o == listop)
o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
o->op_flags |= flags;
o = scope(o);
o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
return o;
}
OP *
Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
{
dTHR;
OP *redo;
OP *next = 0;
OP *listop;
OP *o;
OP *condop;
U8 loopflags = 0;
if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
|| (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
expr = newUNOP(OP_DEFINED, 0,
newASSIGNOP(0, newDEFSVOP(), 0, expr) );
} else if (expr && (expr->op_flags & OPf_KIDS)) {
OP *k1 = ((UNOP*)expr)->op_first;
OP *k2 = (k1) ? k1->op_sibling : NULL;
switch (expr->op_type) {
case OP_NULL:
if (k2 && k2->op_type == OP_READLINE
&& (k2->op_flags & OPf_STACKED)
&& ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
expr = newUNOP(OP_DEFINED, 0, expr);
break;
case OP_SASSIGN:
if (k1->op_type == OP_READDIR
|| k1->op_type == OP_GLOB
|| (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
|| k1->op_type == OP_EACH)
expr = newUNOP(OP_DEFINED, 0, expr);
break;
}
}
if (!block)
block = newOP(OP_NULL, 0);
else if (cont) {
block = scope(block);
}
if (cont) {
next = LINKLIST(cont);
loopflags |= OPpLOOP_CONTINUE;
}
if (expr) {
cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
if ((line_t)whileline != NOLINE) {
PL_copline = whileline;
cont = append_elem(OP_LINESEQ, cont,
newSTATEOP(0, Nullch, Nullop));
}
}
listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
redo = LINKLIST(listop);
if (expr) {
PL_copline = whileline;
scalar(listop);
o = new_logop(OP_AND, 0, &expr, &listop);
if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
op_free(expr); /* oops, it's a while (0) */
op_free((OP*)loop);
return Nullop; /* listop already freed by new_logop */
}
if (listop)
((LISTOP*)listop)->op_last->op_next = condop =
(o == listop ? redo : LINKLIST(o));
if (!next)
next = condop;
}
else
o = listop;
if (!loop) {
NewOp(1101,loop,1,LOOP);
loop->op_type = OP_ENTERLOOP;
loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
loop->op_private = 0;
loop->op_next = (OP*)loop;
}
o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
loop->op_redoop = redo;
loop->op_lastop = o;
o->op_private |= loopflags;
if (next)
loop->op_nextop = next;
else
loop->op_nextop = o;
o->op_flags |= flags;
o->op_private |= (flags >> 8);
return o;
}
OP *
Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
{
LOOP *loop;
OP *wop;
int padoff = 0;
I32 iterflags = 0;
if (sv) {
if (sv->op_type == OP_RV2SV) { /* symbol table variable */
sv->op_type = OP_RV2GV;
sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
}
else if (sv->op_type == OP_PADSV) { /* private variable */
padoff = sv->op_targ;
sv->op_targ = 0;
op_free(sv);
sv = Nullop;
}
else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
padoff = sv->op_targ;
sv->op_targ = 0;
iterflags |= OPf_SPECIAL;
op_free(sv);
sv = Nullop;
}
else
Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
}
else {
#ifdef USE_THREADS
padoff = find_threadsv("_");
iterflags |= OPf_SPECIAL;
#else
sv = newGVOP(OP_GV, 0, PL_defgv);
#endif
}
if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
iterflags |= OPf_STACKED;
}
else if (expr->op_type == OP_NULL &&
(expr->op_flags & OPf_KIDS) &&
((BINOP*)expr)->op_first->op_type == OP_FLOP)
{
/* Basically turn for($x..$y) into the same as for($x,$y), but we
* set the STACKED flag to indicate that these values are to be
* treated as min/max values by 'pp_iterinit'.
*/
UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
LOGOP* range = (LOGOP*) flip->op_first;
OP* left = range->op_first;
OP* right = left->op_sibling;
LISTOP* listop;
range->op_flags &= ~OPf_KIDS;
range->op_first = Nullop;
listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
listop->op_first->op_next = range->op_next;
left->op_next = range->op_other;
right->op_next = (OP*)listop;
listop->op_next = listop->op_first;
op_free(expr);
expr = (OP*)(listop);
null(expr);
iterflags |= OPf_STACKED;
}
else {
expr = mod(force_list(expr), OP_GREPSTART);
}
loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
append_elem(OP_LIST, expr, scalar(sv))));
assert(!loop->op_next);
#ifdef PL_OP_SLAB_ALLOC
{
LOOP *tmp;
NewOp(1234,tmp,1,LOOP);
Copy(loop,tmp,1,LOOP);
loop = tmp;
}
#else
Renew(loop, 1, LOOP);
#endif
loop->op_targ = padoff;
wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
PL_copline = forline;
return newSTATEOP(0, label, wop);
}
OP*
Perl_newLOOPEX(pTHX_ I32 type, OP *label)
{
dTHR;
OP *o;
STRLEN n_a;
if (type != OP_GOTO || label->op_type == OP_CONST) {
/* "last()" means "last" */
if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
o = newOP(type, OPf_SPECIAL);
else {
o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
? SvPVx(((SVOP*)label)->op_sv, n_a)
: ""));
}
op_free(label);
}
else {
if (label->op_type == OP_ENTERSUB)
label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
o = newUNOP(type, OPf_STACKED, label);
}
PL_hints |= HINT_BLOCK_SCOPE;
return o;
}
void
Perl_cv_undef(pTHX_ CV *cv)
{
dTHR;
#ifdef USE_THREADS
if (CvMUTEXP(cv)) {
MUTEX_DESTROY(CvMUTEXP(cv));
Safefree(CvMUTEXP(cv));
CvMUTEXP(cv) = 0;
}
#endif /* USE_THREADS */
if (!CvXSUB(cv) && CvROOT(cv)) {
#ifdef USE_THREADS
if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
Perl_croak(aTHX_ "Can't undef active subroutine");
#else
if (CvDEPTH(cv))
Perl_croak(aTHX_ "Can't undef active subroutine");
#endif /* USE_THREADS */
ENTER;
SAVEVPTR(PL_curpad);
PL_curpad = 0;
if (!CvCLONED(cv))
op_free(CvROOT(cv));
CvROOT(cv) = Nullop;
LEAVE;
}
SvPOK_off((SV*)cv); /* forget prototype */
CvFLAGS(cv) = 0;
SvREFCNT_dec(CvGV(cv));
CvGV(cv) = Nullgv;
SvREFCNT_dec(CvOUTSIDE(cv));
CvOUTSIDE(cv) = Nullcv;
if (CvPADLIST(cv)) {
/* may be during global destruction */
if (SvREFCNT(CvPADLIST(cv))) {
I32 i = AvFILLp(CvPADLIST(cv));
while (i >= 0) {
SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
SV* sv = svp ? *svp : Nullsv;
if (!sv)
continue;
if (sv == (SV*)PL_comppad_name)
PL_comppad_name = Nullav;
else if (sv == (SV*)PL_comppad) {
PL_comppad = Nullav;
PL_curpad = Null(SV**);
}
SvREFCNT_dec(sv);
}
SvREFCNT_dec((SV*)CvPADLIST(cv));
}
CvPADLIST(cv) = Nullav;
}
}
STATIC void
S_cv_dump(pTHX_ CV *cv)
{
#ifdef DEBUGGING
CV *outside = CvOUTSIDE(cv);
AV* padlist = CvPADLIST(cv);
AV* pad_name;
AV* pad;
SV** pname;
SV** ppad;
I32 ix;
PerlIO_printf(Perl_debug_log,
"\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
PTR2UV(cv),
(CvANON(cv) ? "ANON"
: (cv == PL_main_cv) ? "MAIN"
: CvUNIQUE(cv) ? "UNIQUE"
: CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
PTR2UV(outside),
(!outside ? "null"
: CvANON(outside) ? "ANON"
: (outside == PL_main_cv) ? "MAIN"
: CvUNIQUE(outside) ? "UNIQUE"
: CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
if (!padlist)
return;
pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
pad = (AV*)*av_fetch(padlist, 1, FALSE);
pname = AvARRAY(pad_name);
ppad = AvARRAY(pad);
for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
if (SvPOK(pname[ix]))
PerlIO_printf(Perl_debug_log,
"\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
(int)ix, PTR2UV(ppad[ix]),
SvFAKE(pname[ix]) ? "FAKE " : "",
SvPVX(pname[ix]),
(IV)I_32(SvNVX(pname[ix])),
SvIVX(pname[ix]));
}
#endif /* DEBUGGING */
}
STATIC CV *
S_cv_clone2(pTHX_ CV *proto, CV *outside)
{
dTHR;
AV* av;
I32 ix;
AV* protopadlist = CvPADLIST(proto);
AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
SV** pname = AvARRAY(protopad_name);
SV** ppad = AvARRAY(protopad);
I32 fname = AvFILLp(protopad_name);
I32 fpad = AvFILLp(protopad);
AV* comppadlist;
CV* cv;
assert(!CvUNIQUE(proto));
ENTER;
SAVECOMPPAD();
SAVESPTR(PL_comppad_name);
SAVESPTR(PL_compcv);
cv = PL_compcv = (CV*)NEWSV(1104,0);
sv_upgrade((SV *)cv, SvTYPE(proto));
CvFLAGS(cv) = CvFLAGS(proto) & ~CVf_CLONE;
CvCLONED_on(cv);
#ifdef USE_THREADS
New(666, CvMUTEXP(cv), 1, perl_mutex);
MUTEX_INIT(CvMUTEXP(cv));
CvOWNER(cv) = 0;
#endif /* USE_THREADS */
CvFILE(cv) = CvFILE(proto);
CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
CvSTASH(cv) = CvSTASH(proto);
CvROOT(cv) = CvROOT(proto);
CvSTART(cv) = CvSTART(proto);
if (outside)
CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
if (SvPOK(proto))
sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
PL_comppad_name = newAV();
for (ix = fname; ix >= 0; ix--)
av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
PL_comppad = newAV();
comppadlist = newAV();
AvREAL_off(comppadlist);
av_store(comppadlist, 0, (SV*)PL_comppad_name);
av_store(comppadlist, 1, (SV*)PL_comppad);
CvPADLIST(cv) = comppadlist;
av_fill(PL_comppad, AvFILLp(protopad));
PL_curpad = AvARRAY(PL_comppad);
av = newAV(); /* will be @_ */
av_extend(av, 0);
av_store(PL_comppad, 0, (SV*)av);
AvFLAGS(av) = AVf_REIFY;
for (ix = fpad; ix > 0; ix--) {
SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
if (namesv && namesv != &PL_sv_undef) {
char *name = SvPVX(namesv); /* XXX */
if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
I32 off = pad_findlex(name, ix, SvIVX(namesv),
CvOUTSIDE(cv), cxstack_ix, 0, 0);
if (!off)
PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
else if (off != ix)
Perl_croak(aTHX_ "panic: cv_clone: %s", name);
}
else { /* our own lexical */
SV* sv;
if (*name == '&') {
/* anon code -- we'll come back for it */
sv = SvREFCNT_inc(ppad[ix]);
}
else if (*name == '@')
sv = (SV*)newAV();
else if (*name == '%')
sv = (SV*)newHV();
else
sv = NEWSV(0,0);
if (!SvPADBUSY(sv))
SvPADMY_on(sv);
PL_curpad[ix] = sv;
}
}
else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
}
else {
SV* sv = NEWSV(0,0);
SvPADTMP_on(sv);
PL_curpad[ix] = sv;
}
}
/* Now that vars are all in place, clone nested closures. */
for (ix = fpad; ix > 0; ix--) {
SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
if (namesv
&& namesv != &PL_sv_undef
&& !(SvFLAGS(namesv) & SVf_FAKE)
&& *SvPVX(namesv) == '&'
&& CvCLONE(ppad[ix]))
{
CV *kid = cv_clone2((CV*)ppad[ix], cv);
SvREFCNT_dec(ppad[ix]);
CvCLONE_on(kid);
SvPADMY_on(kid);
PL_curpad[ix] = (SV*)kid;
}
}
#ifdef DEBUG_CLOSURES
PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
cv_dump(outside);
PerlIO_printf(Perl_debug_log, " from:\n");
cv_dump(proto);
PerlIO_printf(Perl_debug_log, " to:\n");
cv_dump(cv);
#endif
LEAVE;
return cv;
}
CV *
Perl_cv_clone(pTHX_ CV *proto)
{
CV *cv;
LOCK_CRED_MUTEX; /* XXX create separate mutex */
cv = cv_clone2(proto, CvOUTSIDE(proto));
UNLOCK_CRED_MUTEX; /* XXX create separate mutex */
return cv;
}
void
Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
{
dTHR;
if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_PROTOTYPE)) {
SV* msg = sv_newmortal();
SV* name = Nullsv;
if (gv)
gv_efullname3(name = sv_newmortal(), gv, Nullch);
sv_setpv(msg, "Prototype mismatch:");
if (name)
Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
if (SvPOK(cv))
Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
sv_catpv(msg, " vs ");
if (p)
Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
else
sv_catpv(msg, "none");
Perl_warner(aTHX_ WARN_PROTOTYPE, "%"SVf, msg);
}
}
SV *
Perl_cv_const_sv(pTHX_ CV *cv)
{
if (!cv || !SvPOK(cv) || SvCUR(cv))
return Nullsv;
return op_const_sv(CvSTART(cv), cv);
}
SV *
Perl_op_const_sv(pTHX_ OP *o, CV *cv)
{
SV *sv = Nullsv;
if (!o)
return Nullsv;
if (o->op_type == OP_LINESEQ && cLISTOPo->op_first)
o = cLISTOPo->op_first->op_sibling;
for (; o; o = o->op_next) {
OPCODE type = o->op_type;
if (sv && o->op_next == o)
return sv;
if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
continue;
if (type == OP_LEAVESUB || type == OP_RETURN)
break;
if (sv)
return Nullsv;
if (type == OP_CONST && cSVOPo->op_sv)
sv = cSVOPo->op_sv;
else if ((type == OP_PADSV || type == OP_CONST) && cv) {
AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
return Nullsv;
}
else
return Nullsv;
}
if (sv)
SvREADONLY_on(sv);
return sv;
}
void
Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
{
if (o)
SAVEFREEOP(o);
if (proto)
SAVEFREEOP(proto);
if (attrs)
SAVEFREEOP(attrs);
if (block)
SAVEFREEOP(block);
Perl_croak(aTHX_ "\"my sub\" not yet implemented");
}
CV *
Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
{
return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
}
CV *
Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
{
dTHR;
STRLEN n_a;
char *name;
char *aname;
GV *gv;
char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
register CV *cv=0;
I32 ix;
name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
if (!name && PERLDB_NAMEANON && CopLINE(PL_curcop)) {
SV *sv = sv_newmortal();
Perl_sv_setpvf(aTHX_ sv, "__ANON__[%s:%"IVdf"]",
CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
aname = SvPVX(sv);
}
else
aname = Nullch;
gv = gv_fetchpv(name ? name : (aname ? aname : "__ANON__"),
GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
SVt_PVCV);
if (o)
SAVEFREEOP(o);
if (proto)
SAVEFREEOP(proto);
if (attrs)
SAVEFREEOP(attrs);
if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
maximum a prototype before. */
if (SvTYPE(gv) > SVt_NULL) {
if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
&& ckWARN_d(WARN_PROTOTYPE))
{
Perl_warner(aTHX_ WARN_PROTOTYPE, "Runaway prototype");
}
cv_ckproto((CV*)gv, NULL, ps);
}
if (ps)
sv_setpv((SV*)gv, ps);
else
sv_setiv((SV*)gv, -1);
SvREFCNT_dec(PL_compcv);
cv = PL_compcv = NULL;
PL_sub_generation++;
goto noblock;
}
if (!name || GvCVGEN(gv))
cv = Nullcv;
else if ((cv = GvCV(gv))) {
cv_ckproto(cv, gv, ps);
/* already defined (or promised)? */
if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
SV* const_sv;
bool const_changed = TRUE;
if (!block && !attrs) {
/* just a "sub foo;" when &foo is already defined */
SAVEFREESV(PL_compcv);
goto done;
}
/* ahem, death to those who redefine active sort subs */
if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
if (!block)
goto withattrs;
if ((const_sv = cv_const_sv(cv)))
const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
if ((const_sv || const_changed) && ckWARN(WARN_REDEFINE))
{
line_t oldline = CopLINE(PL_curcop);
CopLINE_set(PL_curcop, PL_copline);
Perl_warner(aTHX_ WARN_REDEFINE,
const_sv ? "Constant subroutine %s redefined"
: "Subroutine %s redefined", name);
CopLINE_set(PL_curcop, oldline);
}
SvREFCNT_dec(cv);
cv = Nullcv;
}
}
withattrs:
if (attrs) {
HV *stash;
SV *rcv;
/* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
* before we clobber PL_compcv.
*/
if (cv && !block) {
rcv = (SV*)cv;
if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
stash = GvSTASH(CvGV(cv));
else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
stash = CvSTASH(cv);
else
stash = PL_curstash;
}
else {
/* possibly about to re-define existing subr -- ignore old cv */
rcv = (SV*)PL_compcv;
if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
stash = GvSTASH(gv);
else
stash = PL_curstash;
}
apply_attrs(stash, rcv, attrs);
}
if (cv) { /* must reuse cv if autoloaded */
if (!block) {
/* got here with just attrs -- work done, so bug out */
SAVEFREESV(PL_compcv);
goto done;
}
cv_undef(cv);
CvFLAGS(cv) = CvFLAGS(PL_compcv);
CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
CvOUTSIDE(PL_compcv) = 0;
CvPADLIST(cv) = CvPADLIST(PL_compcv);
CvPADLIST(PL_compcv) = 0;
if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
SvREFCNT_dec(PL_compcv);
}
else {
cv = PL_compcv;
if (name) {
GvCV(gv) = cv;
GvCVGEN(gv) = 0;
PL_sub_generation++;
}
}
CvGV(cv) = (GV*)SvREFCNT_inc(gv);
CvFILE(cv) = CopFILE(PL_curcop);
CvSTASH(cv) = PL_curstash;
#ifdef USE_THREADS
CvOWNER(cv) = 0;
if (!CvMUTEXP(cv)) {
New(666, CvMUTEXP(cv), 1, perl_mutex);
MUTEX_INIT(CvMUTEXP(cv));
}
#endif /* USE_THREADS */
if (ps)
sv_setpv((SV*)cv, ps);
if (PL_error_count) {
op_free(block);
block = Nullop;
if (name) {
char *s = strrchr(name, ':');
s = s ? s+1 : name;
if (strEQ(s, "BEGIN")) {
char *not_safe =
"BEGIN not safe after errors--compilation aborted";
if (PL_in_eval & EVAL_KEEPERR)
Perl_croak(aTHX_ not_safe);
else {
/* force display of errors found but not reported */
sv_catpv(ERRSV, not_safe);
Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
}
}
}
}
if (!block) {
noblock:
PL_copline = NOLINE;
LEAVE_SCOPE(floor);
return cv;
}
if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
if (CvLVALUE(cv)) {
CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
}
else {
CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
}
CvROOT(cv)->op_private |= OPpREFCOUNTED;
OpREFCNT_set(CvROOT(cv), 1);
CvSTART(cv) = LINKLIST(CvROOT(cv));
CvROOT(cv)->op_next = 0;
peep(CvSTART(cv));
/* now that optimizer has done its work, adjust pad values */
if (CvCLONE(cv)) {
SV **namep = AvARRAY(PL_comppad_name);
for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
SV *namesv;
if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
continue;
/*
* The only things that a clonable function needs in its
* pad are references to outer lexicals and anonymous subs.
* The rest are created anew during cloning.
*/
if (!((namesv = namep[ix]) != Nullsv &&
namesv != &PL_sv_undef &&
(SvFAKE(namesv) ||
*SvPVX(namesv) == '&')))
{
SvREFCNT_dec(PL_curpad[ix]);
PL_curpad[ix] = Nullsv;
}
}
}
else {
AV *av = newAV(); /* Will be @_ */
av_extend(av, 0);
av_store(PL_comppad, 0, (SV*)av);
AvFLAGS(av) = AVf_REIFY;
for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
continue;
if (!SvPADMY(PL_curpad[ix]))
SvPADTMP_on(PL_curpad[ix]);
}
}
if (name || aname) {
char *s;
char *tname = (name ? name : aname);
if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
SV *sv = NEWSV(0,0);
SV *tmpstr = sv_newmortal();
GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
CV *pcv;
HV *hv;
Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
CopFILE(PL_curcop),
(long)PL_subline, (long)CopLINE(PL_curcop));
gv_efullname3(tmpstr, gv, Nullch);
hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
hv = GvHVn(db_postponed);
if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
&& (pcv = GvCV(db_postponed)))
{
dSP;
PUSHMARK(SP);
XPUSHs(tmpstr);
PUTBACK;
call_sv((SV*)pcv, G_DISCARD);
}
}
if ((s = strrchr(tname,':')))
s++;
else
s = tname;
if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
goto done;
if (strEQ(s, "BEGIN")) {
I32 oldscope = PL_scopestack_ix;
ENTER;
SAVECOPFILE(&PL_compiling);
SAVECOPLINE(&PL_compiling);
save_svref(&PL_rs);
sv_setsv(PL_rs, PL_nrs);
if (!PL_beginav)
PL_beginav = newAV();
DEBUG_x( dump_sub(gv) );
av_push(PL_beginav, SvREFCNT_inc(cv));
GvCV(gv) = 0;
call_list(oldscope, PL_beginav);
PL_curcop = &PL_compiling;
PL_compiling.op_private = PL_hints;
LEAVE;
}
else if (strEQ(s, "END") && !PL_error_count) {
if (!PL_endav)
PL_endav = newAV();
DEBUG_x( dump_sub(gv) );
av_unshift(PL_endav, 1);
av_store(PL_endav, 0, SvREFCNT_inc(cv));
GvCV(gv) = 0;
}
else if (strEQ(s, "CHECK") && !PL_error_count) {
if (!PL_checkav)
PL_checkav = newAV();
DEBUG_x( dump_sub(gv) );
if (PL_main_start && ckWARN(WARN_VOID))
Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
av_unshift(PL_checkav, 1);
av_store(PL_checkav, 0, SvREFCNT_inc(cv));
GvCV(gv) = 0;
}
else if (strEQ(s, "INIT") && !PL_error_count) {
if (!PL_initav)
PL_initav = newAV();
DEBUG_x( dump_sub(gv) );
if (PL_main_start && ckWARN(WARN_VOID))
Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
av_push(PL_initav, SvREFCNT_inc(cv));
GvCV(gv) = 0;
}
}
done:
PL_copline = NOLINE;
LEAVE_SCOPE(floor);
return cv;
}
/* XXX unsafe for threads if eval_owner isn't held */
/*
=for apidoc newCONSTSUB
Creates a constant sub equivalent to Perl C<sub FOO () { 123 }> which is
eligible for inlining at compile-time.
=cut
*/
void
Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
{
dTHR;
ENTER;
SAVECOPLINE(PL_curcop);
SAVEHINTS();
CopLINE_set(PL_curcop, PL_copline);
PL_hints &= ~HINT_BLOCK_SCOPE;
if (stash) {
SAVESPTR(PL_curstash);
SAVECOPSTASH(PL_curcop);
PL_curstash = stash;
#ifdef USE_ITHREADS
CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
#else
CopSTASH(PL_curcop) = stash;
#endif
}
newATTRSUB(
start_subparse(FALSE, 0),
newSVOP(OP_CONST, 0, newSVpv(name,0)),
newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
Nullop,
newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
);
LEAVE;
}
/*
=for apidoc U||newXS
Used by C<xsubpp> to hook up XSUBs as Perl subs.
=cut
*/
CV *
Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
{
dTHR;
GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
register CV *cv;
if ((cv = (name ? GvCV(gv) : Nullcv))) {
if (GvCVGEN(gv)) {
/* just a cached method */
SvREFCNT_dec(cv);
cv = 0;
}
else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
/* already defined (or promised) */
if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
&& HvNAME(GvSTASH(CvGV(cv)))
&& strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
line_t oldline = CopLINE(PL_curcop);
if (PL_copline != NOLINE)
CopLINE_set(PL_curcop, PL_copline);
Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
CopLINE_set(PL_curcop, oldline);
}
SvREFCNT_dec(cv);
cv = 0;
}
}
if (cv) /* must reuse cv if autoloaded */
cv_undef(cv);
else {
cv = (CV*)NEWSV(1105,0);
sv_upgrade((SV *)cv, SVt_PVCV);
if (name) {
GvCV(gv) = cv;
GvCVGEN(gv) = 0;
PL_sub_generation++;
}
}
CvGV(cv) = (GV*)SvREFCNT_inc(gv);
#ifdef USE_THREADS
New(666, CvMUTEXP(cv), 1, perl_mutex);
MUTEX_INIT(CvMUTEXP(cv));
CvOWNER(cv) = 0;
#endif /* USE_THREADS */
(void)gv_fetchfile(filename);
CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
an external constant string */
CvXSUB(cv) = subaddr;
if (name) {
char *s = strrchr(name,':');
if (s)
s++;
else
s = name;
if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
goto done;
if (strEQ(s, "BEGIN")) {
if (!PL_beginav)
PL_beginav = newAV();
av_push(PL_beginav, SvREFCNT_inc(cv));
GvCV(gv) = 0;
}
else if (strEQ(s, "END")) {
if (!PL_endav)
PL_endav = newAV();
av_unshift(PL_endav, 1);
av_store(PL_endav, 0, SvREFCNT_inc(cv));
GvCV(gv) = 0;
}
else if (strEQ(s, "CHECK")) {
if (!PL_checkav)
PL_checkav = newAV();
if (PL_main_start && ckWARN(WARN_VOID))
Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
av_unshift(PL_checkav, 1);
av_store(PL_checkav, 0, SvREFCNT_inc(cv));
GvCV(gv) = 0;
}
else if (strEQ(s, "INIT")) {
if (!PL_initav)
PL_initav = newAV();
if (PL_main_start && ckWARN(WARN_VOID))
Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
av_push(PL_initav, SvREFCNT_inc(cv));
GvCV(gv) = 0;
}
}
else
CvANON_on(cv);
done:
return cv;
}
void
Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
{
dTHR;
register CV *cv;
char *name;
GV *gv;
I32 ix;
STRLEN n_a;
if (o)
name = SvPVx(cSVOPo->op_sv, n_a);
else
name = "STDOUT";
gv = gv_fetchpv(name,TRUE, SVt_PVFM);
GvMULTI_on(gv);
if ((cv = GvFORM(gv))) {
if (ckWARN(WARN_REDEFINE)) {
line_t oldline = CopLINE(PL_curcop);
CopLINE_set(PL_curcop, PL_copline);
Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
CopLINE_set(PL_curcop, oldline);
}
SvREFCNT_dec(cv);
}
cv = PL_compcv;
GvFORM(gv) = cv;
CvGV(cv) = (GV*)SvREFCNT_inc(gv);
CvFILE(cv) = CopFILE(PL_curcop);
for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
SvPADTMP_on(PL_curpad[ix]);
}
CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
CvROOT(cv)->op_private |= OPpREFCOUNTED;
OpREFCNT_set(CvROOT(cv), 1);
CvSTART(cv) = LINKLIST(CvROOT(cv));
CvROOT(cv)->op_next = 0;
peep(CvSTART(cv));
op_free(o);
PL_copline = NOLINE;
LEAVE_SCOPE(floor);
}
OP *
Perl_newANONLIST(pTHX_ OP *o)
{
return newUNOP(OP_REFGEN, 0,
mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
}
OP *
Perl_newANONHASH(pTHX_ OP *o)
{
return newUNOP(OP_REFGEN, 0,
mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
}
OP *
Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
{
return newANONATTRSUB(floor, proto, Nullop, block);
}
OP *
Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
{
return newUNOP(OP_REFGEN, 0,
newSVOP(OP_ANONCODE, 0,
(SV*)newATTRSUB(floor, 0, proto, attrs, block)));
}
OP *
Perl_oopsAV(pTHX_ OP *o)
{
switch (o->op_type) {
case OP_PADSV:
o->op_type = OP_PADAV;
o->op_ppaddr = PL_ppaddr[OP_PADAV];
return ref(o, OP_RV2AV);
case OP_RV2SV:
o->op_type = OP_RV2AV;
o->op_ppaddr = PL_ppaddr[OP_RV2AV];
ref(o, OP_RV2AV);
break;
default:
if (ckWARN_d(WARN_INTERNAL))
Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
break;
}
return o;
}
OP *
Perl_oopsHV(pTHX_ OP *o)
{
dTHR;
switch (o->op_type) {
case OP_PADSV:
case OP_PADAV:
o->op_type = OP_PADHV;
o->op_ppaddr = PL_ppaddr[OP_PADHV];
return ref(o, OP_RV2HV);
case OP_RV2SV:
case OP_RV2AV:
o->op_type = OP_RV2HV;
o->op_ppaddr = PL_ppaddr[OP_RV2HV];
ref(o, OP_RV2HV);
break;
default:
if (ckWARN_d(WARN_INTERNAL))
Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
break;
}
return o;
}
OP *
Perl_newAVREF(pTHX_ OP *o)
{
if (o->op_type == OP_PADANY) {
o->op_type = OP_PADAV;
o->op_ppaddr = PL_ppaddr[OP_PADAV];
return o;
}
return newUNOP(OP_RV2AV, 0, scalar(o));
}
OP *
Perl_newGVREF(pTHX_ I32 type, OP *o)
{
if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
return newUNOP(OP_NULL, 0, o);
return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
}
OP *
Perl_newHVREF(pTHX_ OP *o)
{
if (o->op_type == OP_PADANY) {
o->op_type = OP_PADHV;
o->op_ppaddr = PL_ppaddr[OP_PADHV];
return o;
}
return newUNOP(OP_RV2HV, 0, scalar(o));
}
OP *
Perl_oopsCV(pTHX_ OP *o)
{
Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
/* STUB */
return o;
}
OP *
Perl_newCVREF(pTHX_ I32 flags, OP *o)
{
return newUNOP(OP_RV2CV, flags, scalar(o));
}
OP *
Perl_newSVREF(pTHX_ OP *o)
{
if (o->op_type == OP_PADANY) {
o->op_type = OP_PADSV;
o->op_ppaddr = PL_ppaddr[OP_PADSV];
return o;
}
else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
o->op_flags |= OPpDONE_SVREF;
return o;
}
return newUNOP(OP_RV2SV, 0, scalar(o));
}
/* Check routines. */
OP *
Perl_ck_anoncode(pTHX_ OP *o)
{
PADOFFSET ix;
SV* name;
name = NEWSV(1106,0);
sv_upgrade(name, SVt_PVNV);
sv_setpvn(name, "&", 1);
SvIVX(name) = -1;
SvNVX(name) = 1;
ix = pad_alloc(o->op_type, SVs_PADMY);
av_store(PL_comppad_name, ix, name);
av_store(PL_comppad, ix, cSVOPo->op_sv);
SvPADMY_on(cSVOPo->op_sv);
cSVOPo->op_sv = Nullsv;
cSVOPo->op_targ = ix;
return o;
}
OP *
Perl_ck_bitop(pTHX_ OP *o)
{
o->op_private = PL_hints;
return o;
}
OP *
Perl_ck_concat(pTHX_ OP *o)
{
if (cUNOPo->op_first->op_type == OP_CONCAT)
o->op_flags |= OPf_STACKED;
return o;
}
OP *
Perl_ck_spair(pTHX_ OP *o)
{
if (o->op_flags & OPf_KIDS) {
OP* newop;
OP* kid;
OPCODE type = o->op_type;
o = modkids(ck_fun(o), type);
kid = cUNOPo->op_first;
newop = kUNOP->op_first->op_sibling;
if (newop &&
(newop->op_sibling ||
!(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
return o;
}
op_free(kUNOP->op_first);
kUNOP->op_first = newop;
}
o->op_ppaddr = PL_ppaddr[++o->op_type];
return ck_fun(o);
}
OP *
Perl_ck_delete(pTHX_ OP *o)
{
o = ck_fun(o);
o->op_private = 0;
if (o->op_flags & OPf_KIDS) {
OP *kid = cUNOPo->op_first;
switch (kid->op_type) {
case OP_ASLICE:
o->op_flags |= OPf_SPECIAL;
/* FALL THROUGH */
case OP_HSLICE:
o->op_private |= OPpSLICE;
break;
case OP_AELEM:
o->op_flags |= OPf_SPECIAL;
/* FALL THROUGH */
case OP_HELEM:
break;
default:
Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice",
PL_op_desc[o->op_type]);
}
null(kid);
}
return o;
}
OP *
Perl_ck_eof(pTHX_ OP *o)
{
I32 type = o->op_type;
if (o->op_flags & OPf_KIDS) {
if (cLISTOPo->op_first->op_type == OP_STUB) {
op_free(o);
o = newUNOP(type, OPf_SPECIAL,
newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
}
return ck_fun(o);
}
return o;
}
OP *
Perl_ck_eval(pTHX_ OP *o)
{
PL_hints |= HINT_BLOCK_SCOPE;
if (o->op_flags & OPf_KIDS) {
SVOP *kid = (SVOP*)cUNOPo->op_first;
if (!kid) {
o->op_flags &= ~OPf_KIDS;
null(o);
}
else if (kid->op_type == OP_LINESEQ) {
LOGOP *enter;
kid->op_next = o->op_next;
cUNOPo->op_first = 0;
op_free(o);
NewOp(1101, enter, 1, LOGOP);
enter->op_type = OP_ENTERTRY;
enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
enter->op_private = 0;
/* establish postfix order */
enter->op_next = (OP*)enter;
o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
o->op_type = OP_LEAVETRY;
o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
enter->op_other = o;
return o;
}
else
scalar((OP*)kid);
}
else {
op_free(o);
o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
}
o->op_targ = (PADOFFSET)PL_hints;
return o;
}
OP *
Perl_ck_exit(pTHX_ OP *o)
{
#ifdef VMS
HV *table = GvHV(PL_hintgv);
if (table) {
SV **svp = hv_fetch(table, "vmsish_exit", 11, FALSE);
if (svp && *svp && SvTRUE(*svp))
o->op_private |= OPpEXIT_VMSISH;
}
#endif
return ck_fun(o);
}
OP *
Perl_ck_exec(pTHX_ OP *o)
{
OP *kid;
if (o->op_flags & OPf_STACKED) {
o = ck_fun(o);
kid = cUNOPo->op_first->op_sibling;
if (kid->op_type == OP_RV2GV)
null(kid);
}
else
o = listkids(o);
return o;
}
OP *
Perl_ck_exists(pTHX_ OP *o)
{
o = ck_fun(o);
if (o->op_flags & OPf_KIDS) {
OP *kid = cUNOPo->op_first;
if (kid->op_type == OP_ENTERSUB) {
(void) ref(kid, o->op_type);
if (kid->op_type != OP_RV2CV && !PL_error_count)
Perl_croak(aTHX_ "%s argument is not a subroutine name",
PL_op_desc[o->op_type]);
o->op_private |= OPpEXISTS_SUB;
}
else if (kid->op_type == OP_AELEM)
o->op_flags |= OPf_SPECIAL;
else if (kid->op_type != OP_HELEM)
Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element",
PL_op_desc[o->op_type]);
null(kid);
}
return o;
}
#if 0
OP *
Perl_ck_gvconst(pTHX_ register OP *o)
{
o = fold_constants(o);
if (o->op_type == OP_CONST)
o->op_type = OP_GV;
return o;
}
#endif
OP *
Perl_ck_rvconst(pTHX_ register OP *o)
{
dTHR;
SVOP *kid = (SVOP*)cUNOPo->op_first;
o->op_private |= (PL_hints & HINT_STRICT_REFS);
if (kid->op_type == OP_CONST) {
char *name;
int iscv;
GV *gv;
SV *kidsv = kid->op_sv;
STRLEN n_a;
/* Is it a constant from cv_const_sv()? */
if (SvROK(kidsv) && SvREADONLY(kidsv)) {
SV *rsv = SvRV(kidsv);
int svtype = SvTYPE(rsv);
char *badtype = Nullch;
switch (o->op_type) {
case OP_RV2SV:
if (svtype > SVt_PVMG)
badtype = "a SCALAR";
break;
case OP_RV2AV:
if (svtype != SVt_PVAV)
badtype = "an ARRAY";
break;
case OP_RV2HV:
if (svtype != SVt_PVHV) {
if (svtype == SVt_PVAV) { /* pseudohash? */
SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
if (ksv && SvROK(*ksv)
&& SvTYPE(SvRV(*ksv)) == SVt_PVHV)
{
break;
}
}
badtype = "a HASH";
}
break;
case OP_RV2CV:
if (svtype != SVt_PVCV)
badtype = "a CODE";
break;
}
if (badtype)
Perl_croak(aTHX_ "Constant is not %s reference", badtype);
return o;
}
name = SvPV(kidsv, n_a);
if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
char *badthing = Nullch;
switch (o->op_type) {
case OP_RV2SV:
badthing = "a SCALAR";
break;
case OP_RV2AV:
badthing = "an ARRAY";
break;
case OP_RV2HV:
badthing = "a HASH";
break;
}
if (badthing)
Perl_croak(aTHX_
"Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
name, badthing);
}
/*
* This is a little tricky. We only want to add the symbol if we
* didn't add it in the lexer. Otherwise we get duplicate strict
* warnings. But if we didn't add it in the lexer, we must at
* least pretend like we wanted to add it even if it existed before,
* or we get possible typo warnings. OPpCONST_ENTERED says
* whether the lexer already added THIS instance of this symbol.
*/
iscv = (o->op_type == OP_RV2CV) * 2;
do {
gv = gv_fetchpv(name,
iscv | !(kid->op_private & OPpCONST_ENTERED),
iscv
? SVt_PVCV
: o->op_type == OP_RV2SV
? SVt_PV
: o->op_type == OP_RV2AV
? SVt_PVAV
: o->op_type == OP_RV2HV
? SVt_PVHV
: SVt_PVGV);
} while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
if (gv) {
kid->op_type = OP_GV;
SvREFCNT_dec(kid->op_sv);
#ifdef USE_ITHREADS
/* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
GvIN_PAD_on(gv);
PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
#else
kid->op_sv = SvREFCNT_inc(gv);
#endif
kid->op_ppaddr = PL_ppaddr[OP_GV];
}
}
return o;
}
OP *
Perl_ck_ftst(pTHX_ OP *o)
{
dTHR;
I32 type = o->op_type;
if (o->op_flags & OPf_REF) {
/* nothing */
}
else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
SVOP *kid = (SVOP*)cUNOPo->op_first;
if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
STRLEN n_a;
OP *newop = newGVOP(type, OPf_REF,
gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
op_free(o);
o = newop;
}
}
else {
op_free(o);
if (type == OP_FTTTY)
o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
SVt_PVIO));
else
o = newUNOP(type, 0, newDEFSVOP());
}
#ifdef USE_LOCALE
if (type == OP_FTTEXT || type == OP_FTBINARY) {
o->op_private = 0;
if (PL_hints & HINT_LOCALE)
o->op_private |= OPpLOCALE;
}
#endif
return o;
}
OP *
Perl_ck_fun(pTHX_ OP *o)
{
dTHR;
register OP *kid;
OP **tokid;
OP *sibl;
I32 numargs = 0;
int type = o->op_type;
register I32 oa = PL_opargs[type] >> OASHIFT;
if (o->op_flags & OPf_STACKED) {
if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
oa &= ~OA_OPTIONAL;
else
return no_fh_allowed(o);
}
if (o->op_flags & OPf_KIDS) {
STRLEN n_a;
tokid = &cLISTOPo->op_first;
kid = cLISTOPo->op_first;
if (kid->op_type == OP_PUSHMARK ||
(kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK))
{
tokid = &kid->op_sibling;
kid = kid->op_sibling;
}
if (!kid && PL_opargs[type] & OA_DEFGV)
*tokid = kid = newDEFSVOP();
while (oa && kid) {
numargs++;
sibl = kid->op_sibling;
switch (oa & 7) {
case OA_SCALAR:
/* list seen where single (scalar) arg expected? */
if (numargs == 1 && !(oa >> 4)
&& kid->op_type == OP_LIST && type != OP_SCALAR)
{
return too_many_arguments(o,PL_op_desc[type]);
}
scalar(kid);
break;
case OA_LIST:
if (oa < 16) {
kid = 0;
continue;
}
else
list(kid);
break;
case OA_AVREF:
if (kid->op_type == OP_CONST &&
(kid->op_private & OPpCONST_BARE))
{
char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
OP *newop = newAVREF(newGVOP(OP_GV, 0,
gv_fetchpv(name, TRUE, SVt_PVAV) ));
if (ckWARN(WARN_DEPRECATED))
Perl_warner(aTHX_ WARN_DEPRECATED,
"Array @%s missing the @ in argument %"IVdf" of %s()",
name, (IV)numargs, PL_op_desc[type]);
op_free(kid);
kid = newop;
kid->op_sibling = sibl;
*tokid = kid;
}
else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
bad_type(numargs, "array", PL_op_desc[type], kid);
mod(kid, type);
break;
case OA_HVREF:
if (kid->op_type == OP_CONST &&
(kid->op_private & OPpCONST_BARE))
{
char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
OP *newop = newHVREF(newGVOP(OP_GV, 0,
gv_fetchpv(name, TRUE, SVt_PVHV) ));
if (ckWARN(WARN_DEPRECATED))
Perl_warner(aTHX_ WARN_DEPRECATED,
"Hash %%%s missing the %% in argument %"IVdf" of %s()",
name, (IV)numargs, PL_op_desc[type]);
op_free(kid);
kid = newop;
kid->op_sibling = sibl;
*tokid = kid;
}
else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
bad_type(numargs, "hash", PL_op_desc[type], kid);
mod(kid, type);
break;
case OA_CVREF:
{
OP *newop = newUNOP(OP_NULL, 0, kid);
kid->op_sibling = 0;
linklist(kid);
newop->op_next = newop;
kid = newop;
kid->op_sibling = sibl;
*tokid = kid;
}
break;
case OA_FILEREF:
if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
if (kid->op_type == OP_CONST &&
(kid->op_private & OPpCONST_BARE))
{
OP *newop = newGVOP(OP_GV, 0,
gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
SVt_PVIO) );
op_free(kid);
kid = newop;
}
else if (kid->op_type == OP_READLINE) {
/* neophyte patrol: open(<FH>), close(<FH>) etc. */
bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
}
else {
I32 flags = OPf_SPECIAL;
I32 priv = 0;
PADOFFSET targ = 0;
/* is this op a FH constructor? */
if (is_handle_constructor(o,numargs)) {
char *name = Nullch;
STRLEN len;
flags = 0;
/* Set a flag to tell rv2gv to vivify
* need to "prove" flag does not mean something
* else already - NI-S 1999/05/07
*/
priv = OPpDEREF;
if (kid->op_type == OP_PADSV) {
SV **namep = av_fetch(PL_comppad_name,
kid->op_targ, 4);
if (namep && *namep)
name = SvPV(*namep, len);
}
else if (kid->op_type == OP_RV2SV
&& kUNOP->op_first->op_type == OP_GV)
{
GV *gv = cGVOPx_gv(kUNOP->op_first);
name = GvNAME(gv);
len = GvNAMELEN(gv);
}
else if (kid->op_type == OP_AELEM
|| kid->op_type == OP_HELEM)
{
name = "__ANONIO__";
len = 10;
mod(kid,type);
}
if (name) {
SV *namesv;
targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
namesv = PL_curpad[targ];
(void)SvUPGRADE(namesv, SVt_PV);
if (*name != '$')
sv_setpvn(namesv, "$", 1);
sv_catpvn(namesv, name, len);
}
}
kid->op_sibling = 0;
kid = newUNOP(OP_RV2GV, flags, scalar(kid));
kid->op_targ = targ;
kid->op_private |= priv;
}
kid->op_sibling = sibl;
*tokid = kid;
}
scalar(kid);
break;
case OA_SCALARREF:
mod(scalar(kid), type);
break;
}
oa >>= 4;
tokid = &kid->op_sibling;
kid = kid->op_sibling;
}
o->op_private |= numargs;
if (kid)
return too_many_arguments(o,PL_op_desc[o->op_type]);
listkids(o);
}
else if (PL_opargs[type] & OA_DEFGV) {
op_free(o);
return newUNOP(type, 0, newDEFSVOP());
}
if (oa) {
while (oa & OA_OPTIONAL)
oa >>= 4;
if (oa && oa != OA_LIST)
return too_few_arguments(o,PL_op_desc[o->op_type]);
}
return o;
}
OP *
Perl_ck_glob(pTHX_ OP *o)
{
GV *gv;
o = ck_fun(o);
if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
append_elem(OP_GLOB, o, newDEFSVOP());
if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
#if !defined(PERL_EXTERNAL_GLOB)
/* XXX this can be tightened up and made more failsafe. */
if (!gv) {
ENTER;
Perl_load_module(aTHX_ 0, newSVpvn("File::Glob", 10), Nullsv,
/* null-terminated import list */
newSVpvn(":globally", 9), Nullsv);
gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
LEAVE;
}
#endif /* PERL_EXTERNAL_GLOB */
if (gv && GvIMPORTED_CV(gv)) {
append_elem(OP_GLOB, o,
newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
o->op_type = OP_LIST;
o->op_ppaddr = PL_ppaddr[OP_LIST];
cLISTOPo->op_first->op_type = OP_PUSHMARK;
cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
o = newUNOP(OP_ENTERSUB, OPf_STACKED,
append_elem(OP_LIST, o,
scalar(newUNOP(OP_RV2CV, 0,
newGVOP(OP_GV, 0, gv)))));
o = newUNOP(OP_NULL, 0, ck_subr(o));
o->op_targ = OP_GLOB; /* hint at what it used to be */
return o;
}
gv = newGVgen("main");
gv_IOadd(gv);
append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
scalarkids(o);
return o;
}
OP *
Perl_ck_grep(pTHX_ OP *o)
{
LOGOP *gwop;
OP *kid;
OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
NewOp(1101, gwop, 1, LOGOP);
if (o->op_flags & OPf_STACKED) {
OP* k;
o = ck_sort(o);
kid = cLISTOPo->op_first->op_sibling;
for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
kid = k;
}
kid->op_next = (OP*)gwop;
o->op_flags &= ~OPf_STACKED;
}
kid = cLISTOPo->op_first->op_sibling;
if (type == OP_MAPWHILE)
list(kid);
else
scalar(kid);
o = ck_fun(o);
if (PL_error_count)
return o;
kid = cLISTOPo->op_first->op_sibling;
if (kid->op_type != OP_NULL)
Perl_croak(aTHX_ "panic: ck_grep");
kid = kUNOP->op_first;
gwop->op_type = type;
gwop->op_ppaddr = PL_ppaddr[type];
gwop->op_first = listkids(o);
gwop->op_flags |= OPf_KIDS;
gwop->op_private = 1;
gwop->op_other = LINKLIST(kid);
gwop->op_targ = pad_alloc(type, SVs_PADTMP);
kid->op_next = (OP*)gwop;
kid = cLISTOPo->op_first->op_sibling;
if (!kid || !kid->op_sibling)
return too_few_arguments(o,PL_op_desc[o->op_type]);
for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
mod(kid, OP_GREPSTART);
return (OP*)gwop;
}
OP *
Perl_ck_index(pTHX_ OP *o)
{
if (o->op_flags & OPf_KIDS) {
OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
if (kid)
kid = kid->op_sibling; /* get past "big" */
if (kid && kid->op_type == OP_CONST)
fbm_compile(((SVOP*)kid)->op_sv, 0);
}
return ck_fun(o);
}
OP *
Perl_ck_lengthconst(pTHX_ OP *o)
{
/* XXX length optimization goes here */
return ck_fun(o);
}
OP *
Perl_ck_lfun(pTHX_ OP *o)
{
OPCODE type = o->op_type;
return modkids(ck_fun(o), type);
}
OP *
Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
{
dTHR;
if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
switch (cUNOPo->op_first->op_type) {
case OP_RV2AV:
break; /* Globals via GV can be undef */
case OP_PADAV:
case OP_AASSIGN: /* Is this a good idea? */
Perl_warner(aTHX_ WARN_DEPRECATED,
"defined(@array) is deprecated");
Perl_warner(aTHX_ WARN_DEPRECATED,
"\t(Maybe you should just omit the defined()?)\n");
break;
case OP_RV2HV:
break; /* Globals via GV can be undef */
case OP_PADHV:
Perl_warner(aTHX_ WARN_DEPRECATED,
"defined(%%hash) is deprecated");
Perl_warner(aTHX_ WARN_DEPRECATED,
"\t(Maybe you should just omit the defined()?)\n");
break;
default:
/* no warning */
break;
}
}
return ck_rfun(o);
}
OP *
Perl_ck_rfun(pTHX_ OP *o)
{
OPCODE type = o->op_type;
return refkids(ck_fun(o), type);
}
OP *
Perl_ck_listiob(pTHX_ OP *o)
{
register OP *kid;
kid = cLISTOPo->op_first;
if (!kid) {
o = force_list(o);
kid = cLISTOPo->op_first;
}
if (kid->op_type == OP_PUSHMARK)
kid = kid->op_sibling;
if (kid && o->op_flags & OPf_STACKED)
kid = kid->op_sibling;
else if (kid && !kid->op_sibling) { /* print HANDLE; */
if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
o->op_flags |= OPf_STACKED; /* make it a filehandle */
kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
cLISTOPo->op_first->op_sibling = kid;
cLISTOPo->op_last = kid;
kid = kid->op_sibling;
}
}
if (!kid)
append_elem(o->op_type, o, newDEFSVOP());
o = listkids(o);
o->op_private = 0;
#ifdef USE_LOCALE
if (PL_hints & HINT_LOCALE)
o->op_private |= OPpLOCALE;
#endif
return o;
}
OP *
Perl_ck_fun_locale(pTHX_ OP *o)
{
o = ck_fun(o);
o->op_private = 0;
#ifdef USE_LOCALE
if (PL_hints & HINT_LOCALE)
o->op_private |= OPpLOCALE;
#endif
return o;
}
OP *
Perl_ck_sassign(pTHX_ OP *o)
{
OP *kid = cLISTOPo->op_first;
/* has a disposable target? */
if ((PL_opargs[kid->op_type] & OA_TARGLEX)
&& !(kid->op_flags & OPf_STACKED)
/* Cannot steal the second time! */
&& !(kid->op_private & OPpTARGET_MY))
{
OP *kkid = kid->op_sibling;
/* Can just relocate the target. */
if (kkid && kkid->op_type == OP_PADSV
&& !(kkid->op_private & OPpLVAL_INTRO))
{
kid->op_targ = kkid->op_targ;
kkid->op_targ = 0;
/* Now we do not need PADSV and SASSIGN. */
kid->op_sibling = o->op_sibling; /* NULL */
cLISTOPo->op_first = NULL;
op_free(o);
op_free(kkid);
kid->op_private |= OPpTARGET_MY; /* Used for context settings */
return kid;
}
}
return o;
}
OP *
Perl_ck_scmp(pTHX_ OP *o)
{
o->op_private = 0;
#ifdef USE_LOCALE
if (PL_hints & HINT_LOCALE)
o->op_private |= OPpLOCALE;
#endif
return o;
}
OP *
Perl_ck_match(pTHX_ OP *o)
{
o->op_private |= OPpRUNTIME;
return o;
}
OP *
Perl_ck_method(pTHX_ OP *o)
{
OP *kid = cUNOPo->op_first;
if (kid->op_type == OP_CONST) {
SV* sv = kSVOP->op_sv;
if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
OP *cmop;
(void)SvUPGRADE(sv, SVt_PVIV);
(void)SvIOK_on(sv);
PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
kSVOP->op_sv = Nullsv;
op_free(o);
return cmop;
}
}
return o;
}
OP *
Perl_ck_null(pTHX_ OP *o)
{
return o;
}
OP *
Perl_ck_open(pTHX_ OP *o)
{
HV *table = GvHV(PL_hintgv);
if (table) {
SV **svp;
I32 mode;
svp = hv_fetch(table, "open_IN", 7, FALSE);
if (svp && *svp) {
mode = mode_from_discipline(*svp);
if (mode & O_BINARY)
o->op_private |= OPpOPEN_IN_RAW;
else if (mode & O_TEXT)
o->op_private |= OPpOPEN_IN_CRLF;
}
svp = hv_fetch(table, "open_OUT", 8, FALSE);
if (svp && *svp) {
mode = mode_from_discipline(*svp);
if (mode & O_BINARY)
o->op_private |= OPpOPEN_OUT_RAW;
else if (mode & O_TEXT)
o->op_private |= OPpOPEN_OUT_CRLF;
}
}
if (o->op_type == OP_BACKTICK)
return o;
return ck_fun(o);
}
OP *
Perl_ck_repeat(pTHX_ OP *o)
{
if (cBINOPo->op_first->op_flags & OPf_PARENS) {
o->op_private |= OPpREPEAT_DOLIST;
cBINOPo->op_first = force_list(cBINOPo->op_first);
}
else
scalar(o);
return o;
}
OP *
Perl_ck_require(pTHX_ OP *o)
{
if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
SVOP *kid = (SVOP*)cUNOPo->op_first;
if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
char *s;
for (s = SvPVX(kid->op_sv); *s; s++) {
if (*s == ':' && s[1] == ':') {
*s = '/';
Move(s+2, s+1, strlen(s+2)+1, char);
--SvCUR(kid->op_sv);
}
}
if (SvREADONLY(kid->op_sv)) {
SvREADONLY_off(kid->op_sv);
sv_catpvn(kid->op_sv, ".pm", 3);
SvREADONLY_on(kid->op_sv);
}
else
sv_catpvn(kid->op_sv, ".pm", 3);
}
}
return ck_fun(o);
}
#if 0
OP *
Perl_ck_retarget(pTHX_ OP *o)
{
Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
/* STUB */
return o;
}
#endif
OP *
Perl_ck_select(pTHX_ OP *o)
{
OP* kid;
if (o->op_flags & OPf_KIDS) {
kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
if (kid && kid->op_sibling) {
o->op_type = OP_SSELECT;
o->op_ppaddr = PL_ppaddr[OP_SSELECT];
o = ck_fun(o);
return fold_constants(o);
}
}
o = ck_fun(o);
kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
if (kid && kid->op_type == OP_RV2GV)
kid->op_private &= ~HINT_STRICT_REFS;
return o;
}
OP *
Perl_ck_shift(pTHX_ OP *o)
{
I32 type = o->op_type;
if (!(o->op_flags & OPf_KIDS)) {
OP *argop;
op_free(o);
#ifdef USE_THREADS
if (!CvUNIQUE(PL_compcv)) {
argop = newOP(OP_PADAV, OPf_REF);
argop->op_targ = 0; /* PL_curpad[0] is @_ */
}
else {
argop = newUNOP(OP_RV2AV, 0,
scalar(newGVOP(OP_GV, 0,
gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
}
#else
argop = newUNOP(OP_RV2AV, 0,
scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
#endif /* USE_THREADS */
return newUNOP(type, 0, scalar(argop));
}
return scalar(modkids(ck_fun(o), type));
}
OP *
Perl_ck_sort(pTHX_ OP *o)
{
o->op_private = 0;
#ifdef USE_LOCALE
if (PL_hints & HINT_LOCALE)
o->op_private |= OPpLOCALE;
#endif
if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
simplify_sort(o);
if (o->op_flags & OPf_STACKED) { /* may have been cleared */
OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
OP *k;
kid = kUNOP->op_first; /* get past null */
if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
linklist(kid);
if (kid->op_type == OP_SCOPE) {
k = kid->op_next;
kid->op_next = 0;
}
else if (kid->op_type == OP_LEAVE) {
if (o->op_type == OP_SORT) {
null(kid); /* wipe out leave */
kid->op_next = kid;
for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
if (k->op_next == kid)
k->op_next = 0;
/* don't descend into loops */
else if (k->op_type == OP_ENTERLOOP
|| k->op_type == OP_ENTERITER)
{
k = cLOOPx(k)->op_lastop;
}
}
}
else
kid->op_next = 0; /* just disconnect the leave */
k = kLISTOP->op_first;
}
peep(k);
kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
if (o->op_type == OP_SORT)
kid->op_next = kid;
else
kid->op_next = k;
o->op_flags |= OPf_SPECIAL;
}
else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
null(cLISTOPo->op_first->op_sibling);
}
return o;
}
STATIC void
S_simplify_sort(pTHX_ OP *o)
{
dTHR;
register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
OP *k;
int reversed;
GV *gv;
if (!(o->op_flags & OPf_STACKED))
return;
GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
kid = kUNOP->op_first; /* get past null */
if (kid->op_type != OP_SCOPE)
return;
kid = kLISTOP->op_last; /* get past scope */
switch(kid->op_type) {
case OP_NCMP:
case OP_I_NCMP:
case OP_SCMP:
break;
default:
return;
}
k = kid; /* remember this node*/
if (kBINOP->op_first->op_type != OP_RV2SV)
return;
kid = kBINOP->op_first; /* get past cmp */
if (kUNOP->op_first->op_type != OP_GV)
return;
kid = kUNOP->op_first; /* get past rv2sv */
gv = kGVOP_gv;
if (GvSTASH(gv) != PL_curstash)
return;
if (strEQ(GvNAME(gv), "a"))
reversed = 0;
else if (strEQ(GvNAME(gv), "b"))
reversed = 1;
else
return;
kid = k; /* back to cmp */
if (kBINOP->op_last->op_type != OP_RV2SV)
return;
kid = kBINOP->op_last; /* down to 2nd arg */
if (kUNOP->op_first->op_type != OP_GV)
return;
kid = kUNOP->op_first; /* get past rv2sv */
gv = kGVOP_gv;
if (GvSTASH(gv) != PL_curstash
|| ( reversed
? strNE(GvNAME(gv), "a")
: strNE(GvNAME(gv), "b")))
return;
o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
if (reversed)
o->op_private |= OPpSORT_REVERSE;
if (k->op_type == OP_NCMP)
o->op_private |= OPpSORT_NUMERIC;
if (k->op_type == OP_I_NCMP)
o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
kid = cLISTOPo->op_first->op_sibling;
cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
op_free(kid); /* then delete it */
cLISTOPo->op_children--;
}
OP *
Perl_ck_split(pTHX_ OP *o)
{
register OP *kid;
if (o->op_flags & OPf_STACKED)
return no_fh_allowed(o);
kid = cLISTOPo->op_first;
if (kid->op_type != OP_NULL)
Perl_croak(aTHX_ "panic: ck_split");
kid = kid->op_sibling;
op_free(cLISTOPo->op_first);
cLISTOPo->op_first = kid;
if (!kid) {
cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
cLISTOPo->op_last = kid; /* There was only one element previously */
}
if (kid->op_type != OP_MATCH) {
OP *sibl = kid->op_sibling;
kid->op_sibling = 0;
kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
if (cLISTOPo->op_first == cLISTOPo->op_last)
cLISTOPo->op_last = kid;
cLISTOPo->op_first = kid;
kid->op_sibling = sibl;
}
kid->op_type = OP_PUSHRE;
kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
scalar(kid);
if (!kid->op_sibling)
append_elem(OP_SPLIT, o, newDEFSVOP());
kid = kid->op_sibling;
scalar(kid);
if (!kid->op_sibling)
append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
kid = kid->op_sibling;
scalar(kid);
if (kid->op_sibling)
return too_many_arguments(o,PL_op_desc[o->op_type]);
return o;
}
OP *
Perl_ck_join(pTHX_ OP *o)
{
if (ckWARN(WARN_SYNTAX)) {
OP *kid = cLISTOPo->op_first->op_sibling;
if (kid && kid->op_type == OP_MATCH) {
char *pmstr = "STRING";
if (kPMOP->op_pmregexp)
pmstr = kPMOP->op_pmregexp->precomp;
Perl_warner(aTHX_ WARN_SYNTAX,
"/%s/ should probably be written as \"%s\"",
pmstr, pmstr);
}
}
return ck_fun(o);
}
OP *
Perl_ck_subr(pTHX_ OP *o)
{
dTHR;
OP *prev = ((cUNOPo->op_first->op_sibling)
? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
OP *o2 = prev->op_sibling;
OP *cvop;
char *proto = 0;
CV *cv = 0;
GV *namegv = 0;
int optional = 0;
I32 arg = 0;
STRLEN n_a;
o->op_private |= OPpENTERSUB_HASTARG;
for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
if (cvop->op_type == OP_RV2CV) {
SVOP* tmpop;
o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
null(cvop); /* disable rv2cv */
tmpop = (SVOP*)((UNOP*)cvop)->op_first;
if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
GV *gv = cGVOPx_gv(tmpop);
cv = GvCVu(gv);
if (!cv)
tmpop->op_private |= OPpEARLY_CV;
else if (SvPOK(cv)) {
namegv = CvANON(cv) ? gv : CvGV(cv);
proto = SvPV((SV*)cv, n_a);
}
}
}
else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
if (o2->op_type == OP_CONST)
o2->op_private &= ~OPpCONST_STRICT;
else if (o2->op_type == OP_LIST) {
OP *o = ((UNOP*)o2)->op_first->op_sibling;
if (o && o->op_type == OP_CONST)
o->op_private &= ~OPpCONST_STRICT;
}
}
o->op_private |= (PL_hints & HINT_STRICT_REFS);
if (PERLDB_SUB && PL_curstash != PL_debstash)
o->op_private |= OPpENTERSUB_DB;
while (o2 != cvop) {
if (proto) {
switch (*proto) {
case '\0':
return too_many_arguments(o, gv_ename(namegv));
case ';':
optional = 1;
proto++;
continue;
case '$':
proto++;
arg++;
scalar(o2);
break;
case '%':
case '@':
list(o2);
arg++;
break;
case '&':
proto++;
arg++;
if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
bad_type(arg, "block", gv_ename(namegv), o2);
break;
case '*':
/* '*' allows any scalar type, including bareword */
proto++;
arg++;
if (o2->op_type == OP_RV2GV)
goto wrapref; /* autoconvert GLOB -> GLOBref */
else if (o2->op_type == OP_CONST)
o2->op_private &= ~OPpCONST_STRICT;
else if (o2->op_type == OP_ENTERSUB) {
/* accidental subroutine, revert to bareword */
OP *gvop = ((UNOP*)o2)->op_first;
if (gvop && gvop->op_type == OP_NULL) {
gvop = ((UNOP*)gvop)->op_first;
if (gvop) {
for (; gvop->op_sibling; gvop = gvop->op_sibling)
;
if (gvop &&
(gvop->op_private & OPpENTERSUB_NOPAREN) &&
(gvop = ((UNOP*)gvop)->op_first) &&
gvop->op_type == OP_GV)
{
GV *gv = cGVOPx_gv(gvop);
OP *sibling = o2->op_sibling;
SV *n = newSVpvn("",0);
op_free(o2);
gv_fullname3(n, gv, "");
if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
sv_chop(n, SvPVX(n)+6);
o2 = newSVOP(OP_CONST, 0, n);
prev->op_sibling = o2;
o2->op_sibling = sibling;
}
}
}
}
scalar(o2);
break;
case '\\':
proto++;
arg++;
switch (*proto++) {
case '*':
if (o2->op_type != OP_RV2GV)
bad_type(arg, "symbol", gv_ename(namegv), o2);
goto wrapref;
case '&':
if (o2->op_type != OP_RV2CV)
bad_type(arg, "sub", gv_ename(namegv), o2);
goto wrapref;
case '$':
if (o2->op_type != OP_RV2SV
&& o2->op_type != OP_PADSV
&& o2->op_type != OP_HELEM
&& o2->op_type != OP_AELEM
&& o2->op_type != OP_THREADSV)
{
bad_type(arg, "scalar", gv_ename(namegv), o2);
}
goto wrapref;
case '@':
if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
bad_type(arg, "array", gv_ename(namegv), o2);
goto wrapref;
case '%':
if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
bad_type(arg, "hash", gv_ename(namegv), o2);
wrapref:
{
OP* kid = o2;
OP* sib = kid->op_sibling;
kid->op_sibling = 0;
o2 = newUNOP(OP_REFGEN, 0, kid);
o2->op_sibling = sib;
prev->op_sibling = o2;
}
break;
default: goto oops;
}
break;
case ' ':
proto++;
continue;
default:
oops:
Perl_croak(aTHX_ "Malformed prototype for %s: %s",
gv_ename(namegv), SvPV((SV*)cv, n_a));
}
}
else
list(o2);
mod(o2, OP_ENTERSUB);
prev = o2;
o2 = o2->op_sibling;
}
if (proto && !optional &&
(*proto && *proto != '@' && *proto != '%' && *proto != ';'))
return too_few_arguments(o, gv_ename(namegv));
return o;
}
OP *
Perl_ck_svconst(pTHX_ OP *o)
{
SvREADONLY_on(cSVOPo->op_sv);
return o;
}
OP *
Perl_ck_trunc(pTHX_ OP *o)
{
if (o->op_flags & OPf_KIDS) {
SVOP *kid = (SVOP*)cUNOPo->op_first;
if (kid->op_type == OP_NULL)
kid = (SVOP*)kid->op_sibling;
if (kid && kid->op_type == OP_CONST &&
(kid->op_private & OPpCONST_BARE))
{
o->op_flags |= OPf_SPECIAL;
kid->op_private &= ~OPpCONST_STRICT;
}
}
return ck_fun(o);
}
/* A peephole optimizer. We visit the ops in the order they're to execute. */
void
Perl_peep(pTHX_ register OP *o)
{
dTHR;
register OP* oldop = 0;
STRLEN n_a;
OP *last_composite = Nullop;
if (!o || o->op_seq)
return;
ENTER;
SAVEOP();
SAVEVPTR(PL_curcop);
for (; o; o = o->op_next) {
if (o->op_seq)
break;
if (!PL_op_seqmax)
PL_op_seqmax++;
PL_op = o;
switch (o->op_type) {
case OP_SETSTATE:
case OP_NEXTSTATE:
case OP_DBSTATE:
PL_curcop = ((COP*)o); /* for warnings */
o->op_seq = PL_op_seqmax++;
last_composite = Nullop;
break;
case OP_CONST:
if (cSVOPo->op_private & OPpCONST_STRICT)
no_bareword_allowed(o);
#ifdef USE_ITHREADS
/* Relocate sv to the pad for thread safety.
* Despite being a "constant", the SV is written to,
* for reference counts, sv_upgrade() etc. */
if (cSVOP->op_sv) {
PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
SvREFCNT_dec(PL_curpad[ix]);
SvPADTMP_on(cSVOPo->op_sv);
PL_curpad[ix] = cSVOPo->op_sv;
cSVOPo->op_sv = Nullsv;
o->op_targ = ix;
}
#endif
o->op_seq = PL_op_seqmax++;
break;
case OP_CONCAT:
if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
if (o->op_next->op_private & OPpTARGET_MY) {
if (o->op_flags & OPf_STACKED) /* chained concats */
goto ignore_optimization;
else {
/* assert(PL_opargs[o->op_type] & OA_TARGLEX); */
o->op_targ = o->op_next->op_targ;
o->op_next->op_targ = 0;
o->op_private |= OPpTARGET_MY;
}
}
null(o->op_next);
}
ignore_optimization:
o->op_seq = PL_op_seqmax++;
break;
case OP_STUB:
if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
o->op_seq = PL_op_seqmax++;
break; /* Scalar stub must produce undef. List stub is noop */
}
goto nothin;
case OP_NULL:
if (o->op_targ == OP_NEXTSTATE
|| o->op_targ == OP_DBSTATE
|| o->op_targ == OP_SETSTATE)
{
PL_curcop = ((COP*)o);
}
goto nothin;
case OP_SCALAR:
case OP_LINESEQ:
case OP_SCOPE:
nothin:
if (oldop && o->op_next) {
oldop->op_next = o->op_next;
continue;
}
o->op_seq = PL_op_seqmax++;
break;
case OP_GV:
if (o->op_next->op_type == OP_RV2SV) {
if (!(o->op_next->op_private & OPpDEREF)) {
null(o->op_next);
o->op_private |= o->op_next->op_private & (OPpLVAL_INTRO
| OPpOUR_INTRO);
o->op_next = o->op_next->op_next;
o->op_type = OP_GVSV;
o->op_ppaddr = PL_ppaddr[OP_GVSV];
}
}
else if (o->op_next->op_type == OP_RV2AV) {
OP* pop = o->op_next->op_next;
IV i;
if (pop->op_type == OP_CONST &&
(PL_op = pop->op_next) &&
pop->op_next->op_type == OP_AELEM &&
!(pop->op_next->op_private &
(OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
(i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
<= 255 &&
i >= 0)
{
GV *gv;
null(o->op_next);
null(pop->op_next);
null(pop);
o->op_flags |= pop->op_next->op_flags & OPf_MOD;
o->op_next = pop->op_next->op_next;
o->op_type = OP_AELEMFAST;
o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
o->op_private = (U8)i;
gv = cGVOPo_gv;
GvAVn(gv);
}
}
else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_PROTOTYPE)) {
GV *gv = cGVOPo_gv;
if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
/* XXX could check prototype here instead of just carping */
SV *sv = sv_newmortal();
gv_efullname3(sv, gv, Nullch);
Perl_warner(aTHX_ WARN_PROTOTYPE,
"%s() called too early to check prototype",
SvPV_nolen(sv));
}
}
o->op_seq = PL_op_seqmax++;
break;
case OP_MAPWHILE:
case OP_GREPWHILE:
case OP_AND:
case OP_OR:
case OP_ANDASSIGN:
case OP_ORASSIGN:
case OP_COND_EXPR:
case OP_RANGE:
o->op_seq = PL_op_seqmax++;
while (cLOGOP->op_other->op_type == OP_NULL)
cLOGOP->op_other = cLOGOP->op_other->op_next;
peep(cLOGOP->op_other);
break;
case OP_ENTERLOOP:
o->op_seq = PL_op_seqmax++;
peep(cLOOP->op_redoop);
peep(cLOOP->op_nextop);
peep(cLOOP->op_lastop);
break;
case OP_QR:
case OP_MATCH:
case OP_SUBST:
o->op_seq = PL_op_seqmax++;
peep(cPMOP->op_pmreplstart);
break;
case OP_EXEC:
o->op_seq = PL_op_seqmax++;
if (ckWARN(WARN_SYNTAX) && o->op_next
&& o->op_next->op_type == OP_NEXTSTATE) {
if (o->op_next->op_sibling &&
o->op_next->op_sibling->op_type != OP_EXIT &&
o->op_next->op_sibling->op_type != OP_WARN &&
o->op_next->op_sibling->op_type != OP_DIE) {
line_t oldline = CopLINE(PL_curcop);
CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
Perl_warner(aTHX_ WARN_EXEC,
"Statement unlikely to be reached");
Perl_warner(aTHX_ WARN_EXEC,
"\t(Maybe you meant system() when you said exec()?)\n");
CopLINE_set(PL_curcop, oldline);
}
}
break;
case OP_HELEM: {
UNOP *rop;
SV *lexname;
GV **fields;
SV **svp, **indsvp, *sv;
I32 ind;
char *key;
STRLEN keylen;
o->op_seq = PL_op_seqmax++;
if ((o->op_private & (OPpLVAL_INTRO))
|| ((BINOP*)o)->op_last->op_type != OP_CONST)
break;
rop = (UNOP*)((BINOP*)o)->op_first;
if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
break;
lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
if (!SvOBJECT(lexname))
break;
fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
if (!fields || !GvHV(*fields))
break;
svp = cSVOPx_svp(((BINOP*)o)->op_last);
key = SvPV(*svp, keylen);
indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
if (!indsvp) {
Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
}
ind = SvIV(*indsvp);
if (ind < 1)
Perl_croak(aTHX_ "Bad index while coercing array into hash");
rop->op_type = OP_RV2AV;
rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
o->op_type = OP_AELEM;
o->op_ppaddr = PL_ppaddr[OP_AELEM];
sv = newSViv(ind);
if (SvREADONLY(*svp))
SvREADONLY_on(sv);
SvFLAGS(sv) |= (SvFLAGS(*svp)
& (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
SvREFCNT_dec(*svp);
*svp = sv;
break;
}
case OP_HSLICE: {
UNOP *rop;
SV *lexname;
GV **fields;
SV **svp, **indsvp, *sv;
I32 ind;
char *key;
STRLEN keylen;
SVOP *first_key_op, *key_op;
o->op_seq = PL_op_seqmax++;
if ((o->op_private & (OPpLVAL_INTRO))
/* I bet there's always a pushmark... */
|| ((LISTOP*)o)->op_first->op_sibling->op_type != OP_LIST)
/* hmmm, no optimization if list contains only one key. */
break;
rop = (UNOP*)((LISTOP*)o)->op_last;
if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
break;
lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
if (!SvOBJECT(lexname))
break;
fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
if (!fields || !GvHV(*fields))
break;
/* Again guessing that the pushmark can be jumped over.... */
first_key_op = (SVOP*)((LISTOP*)((LISTOP*)o)->op_first->op_sibling)
->op_first->op_sibling;
/* Check that the key list contains only constants. */
for (key_op = first_key_op; key_op;
key_op = (SVOP*)key_op->op_sibling)
if (key_op->op_type != OP_CONST)
break;
if (key_op)
break;
rop->op_type = OP_RV2AV;
rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
o->op_type = OP_ASLICE;
o->op_ppaddr = PL_ppaddr[OP_ASLICE];
for (key_op = first_key_op; key_op;
key_op = (SVOP*)key_op->op_sibling) {
svp = cSVOPx_svp(key_op);
key = SvPV(*svp, keylen);
indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
if (!indsvp) {
Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" "
"in variable %s of type %s",
key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
}
ind = SvIV(*indsvp);
if (ind < 1)
Perl_croak(aTHX_ "Bad index while coercing array into hash");
sv = newSViv(ind);
if (SvREADONLY(*svp))
SvREADONLY_on(sv);
SvFLAGS(sv) |= (SvFLAGS(*svp)
& (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
SvREFCNT_dec(*svp);
*svp = sv;
}
break;
}
case OP_RV2AV:
case OP_RV2HV:
if (!(o->op_flags & OPf_WANT)
|| (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
{
last_composite = o;
}
o->op_seq = PL_op_seqmax++;
break;
case OP_RETURN:
if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
o->op_seq = PL_op_seqmax++;
break;
}
/* FALL THROUGH */
case OP_LEAVESUBLV:
if (last_composite) {
OP *r = last_composite;
while (r->op_sibling)
r = r->op_sibling;
if (r->op_next == o
|| (r->op_next->op_type == OP_LIST
&& r->op_next->op_next == o))
{
if (last_composite->op_type == OP_RV2AV)
yyerror("Lvalue subs returning arrays not implemented yet");
else
yyerror("Lvalue subs returning hashes not implemented yet");
;
}
}
/* FALL THROUGH */
default:
o->op_seq = PL_op_seqmax++;
break;
}
oldop = o;
}
LEAVE;
}
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