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################################################################################
##
## Version 3.x, Copyright (C) 2004-2013, Marcus Holland-Moritz.
## Version 2.x, Copyright (C) 2001, Paul Marquess.
## Version 1.x, Copyright (C) 1999, Kenneth Albanowski.
##
## This program is free software; you can redistribute it and/or
## modify it under the same terms as Perl itself.
##
################################################################################
=provides
caller_cx
__UNDEFINED__
=implementation
#ifdef USE_ITHREADS
__UNDEFINED__ CopFILE(c) ((c)->cop_file)
__UNDEFINED__ CopFILEGV(c) (CopFILE(c) ? gv_fetchfile(CopFILE(c)) : Nullgv)
__UNDEFINED__ CopFILE_set(c,pv) ((c)->cop_file = savepv(pv))
__UNDEFINED__ CopFILESV(c) (CopFILE(c) ? GvSV(gv_fetchfile(CopFILE(c))) : Nullsv)
__UNDEFINED__ CopFILEAV(c) (CopFILE(c) ? GvAV(gv_fetchfile(CopFILE(c))) : Nullav)
__UNDEFINED__ CopSTASHPV(c) ((c)->cop_stashpv)
__UNDEFINED__ CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : Nullch))
__UNDEFINED__ CopSTASH(c) (CopSTASHPV(c) ? gv_stashpv(CopSTASHPV(c),GV_ADD) : Nullhv)
__UNDEFINED__ CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME(hv) : Nullch)
__UNDEFINED__ CopSTASH_eq(c,hv) ((hv) && (CopSTASHPV(c) == HvNAME(hv) \
|| (CopSTASHPV(c) && HvNAME(hv) \
&& strEQ(CopSTASHPV(c), HvNAME(hv)))))
#else
__UNDEFINED__ CopFILEGV(c) ((c)->cop_filegv)
__UNDEFINED__ CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv))
__UNDEFINED__ CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv))
__UNDEFINED__ CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : Nullsv)
__UNDEFINED__ CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : Nullav)
__UNDEFINED__ CopFILE(c) (CopFILESV(c) ? SvPVX(CopFILESV(c)) : Nullch)
__UNDEFINED__ CopSTASH(c) ((c)->cop_stash)
__UNDEFINED__ CopSTASH_set(c,hv) ((c)->cop_stash = (hv))
__UNDEFINED__ CopSTASHPV(c) (CopSTASH(c) ? HvNAME(CopSTASH(c)) : Nullch)
__UNDEFINED__ CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD))
__UNDEFINED__ CopSTASH_eq(c,hv) (CopSTASH(c) == (hv))
#endif /* USE_ITHREADS */
#if { VERSION >= 5.6.0 }
#ifndef caller_cx
# if defined(NEED_caller_cx) || defined(NEED_caller_cx_GLOBAL)
static I32
DPPP_dopoptosub_at(const PERL_CONTEXT *cxstk, I32 startingblock)
{
I32 i;
for (i = startingblock; i >= 0; i--) {
register const PERL_CONTEXT * const cx = &cxstk[i];
switch (CxTYPE(cx)) {
default:
continue;
case CXt_EVAL:
case CXt_SUB:
case CXt_FORMAT:
return i;
}
}
return i;
}
# endif
# if { NEED caller_cx }
const PERL_CONTEXT *
caller_cx(pTHX_ I32 level, const PERL_CONTEXT **dbcxp)
{
register I32 cxix = DPPP_dopoptosub_at(cxstack, cxstack_ix);
register const PERL_CONTEXT *cx;
register const PERL_CONTEXT *ccstack = cxstack;
const PERL_SI *top_si = PL_curstackinfo;
for (;;) {
/* we may be in a higher stacklevel, so dig down deeper */
while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
top_si = top_si->si_prev;
ccstack = top_si->si_cxstack;
cxix = DPPP_dopoptosub_at(ccstack, top_si->si_cxix);
}
if (cxix < 0)
return NULL;
/* caller() should not report the automatic calls to &DB::sub */
if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
level++;
if (!level--)
break;
cxix = DPPP_dopoptosub_at(ccstack, cxix - 1);
}
cx = &ccstack[cxix];
if (dbcxp) *dbcxp = cx;
if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
const I32 dbcxix = DPPP_dopoptosub_at(ccstack, cxix - 1);
/* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
field below is defined for any cx. */
/* caller() should not report the automatic calls to &DB::sub */
if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
cx = &ccstack[dbcxix];
}
return cx;
}
# endif
#endif /* caller_cx */
#endif /* 5.6.0 */
=xsinit
#define NEED_caller_cx
=xsubs
char *
CopSTASHPV()
CODE:
RETVAL = CopSTASHPV(PL_curcop);
OUTPUT:
RETVAL
char *
CopFILE()
CODE:
RETVAL = CopFILE(PL_curcop);
OUTPUT:
RETVAL
#if { VERSION >= 5.6.0 }
void
caller_cx(level)
I32 level
PREINIT:
const PERL_CONTEXT *cx, *dbcx;
const char *pv;
const GV *gv;
PPCODE:
cx = caller_cx(level, &dbcx);
if (!cx) XSRETURN_EMPTY;
EXTEND(SP, 4);
pv = CopSTASHPV(cx->blk_oldcop);
ST(0) = pv ? sv_2mortal(newSVpv(pv, 0)) : &PL_sv_undef;
gv = CvGV(cx->blk_sub.cv);
ST(1) = isGV(gv) ? sv_2mortal(newSVpv(GvNAME(gv), 0)) : &PL_sv_undef;
pv = CopSTASHPV(dbcx->blk_oldcop);
ST(2) = pv ? sv_2mortal(newSVpv(pv, 0)) : &PL_sv_undef;
gv = CvGV(dbcx->blk_sub.cv);
ST(3) = isGV(gv) ? sv_2mortal(newSVpv(GvNAME(gv), 0)) : &PL_sv_undef;
XSRETURN(4);
#endif /* 5.6.0 */
=tests plan => 8
my $package;
{
package MyPackage;
$package = &Devel::PPPort::CopSTASHPV();
}
print "# $package\n";
ok($package, "MyPackage");
my $file = &Devel::PPPort::CopFILE();
print "# $file\n";
ok($file =~ /cop/i);
BEGIN {
if ("$]" < 5.006000) {
# Skip
for (1..8) {
ok(1, 1);
}
exit;
}
}
BEGIN {
package DB;
no strict "refs";
local $^P = 1;
sub sub { &$DB::sub }
}
{ package One; sub one { Devel::PPPort::caller_cx($_[0]) } }
{
package Two;
sub two { One::one(@_) }
sub dbtwo {
BEGIN { $^P = 1 }
One::one(@_);
BEGIN { $^P = 0 }
}
}
for (
# This is rather confusing. The package is the package the call is
# made *from*, the sub name is the sub the call is made *to*. When
# DB::sub is involved the first call is to DB::sub from the calling
# package, the second is to the real sub from package DB.
[\&One::one, 0, qw/main one main one/],
[\&One::one, 2, ],
[\&Two::two, 0, qw/Two one Two one/],
[\&Two::two, 1, qw/main two main two/],
[\&Two::dbtwo, 0, qw/Two sub DB one/],
[\&Two::dbtwo, 1, qw/main dbtwo main dbtwo/],
) {
my ($sub, $arg, @want) = @$_;
my @got = $sub->($arg);
ok(eq_array(\@got, \@want));
}
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