IV
PerlIOScalar_pushed(pTHX_ PerlIO * f, const char *mode, SV * arg,
PerlIO_funcs * tab)
{
IV code;
PerlIOScalar *s = PerlIOSelf(f, PerlIOScalar);
/* If called (normally) via open() then arg is ref to scalar we are
* using, otherwise arg (from binmode presumably) is either NULL
* or the _name_ of the scalar
*/
if (arg) {
if (SvROK(arg)) {
s->var = SvREFCNT_inc(SvRV(arg));
if (!SvPOK(s->var) && SvTYPE(SvRV(arg)) > SVt_NULL)
(void)SvPV_nolen(s->var);
}
else {
s->var =
SvREFCNT_inc(perl_get_sv
(SvPV_nolen(arg), GV_ADD | GV_ADDMULTI));
}
}
else {
s->var = newSVpvn("", 0);
}
SvUPGRADE(s->var, SVt_PV);
code = PerlIOBase_pushed(aTHX_ f, mode, Nullsv, tab);
if (!SvOK(s->var) || (PerlIOBase(f)->flags) & PERLIO_F_TRUNCATE)
SvCUR(s->var) = 0;
if ((PerlIOBase(f)->flags) & PERLIO_F_APPEND)
s->posn = SvCUR(s->var);
else
s->posn = 0;
return code;
}
IV
PerlIOWin32_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
{
IV code = PerlIOBase_pushed(aTHX_ f,mode,arg,tab);
if (*PerlIONext(f))
{
PerlIOWin32 *s = PerlIOSelf(f,PerlIOWin32);
s->fd = PerlIO_fileno(PerlIONext(f));
}
PerlIOBase(f)->flags |= PERLIO_F_OPEN;
Perl_ck_warner_d(aTHX_
packWARN(WARN_EXPERIMENTAL__WIN32_PERLIO),
"PerlIO layer ':win32' is experimental");
return code;
}
IV
PerlIOScalar_pushed(pTHX_ PerlIO * f, const char *mode, SV * arg,
PerlIO_funcs * tab)
{
IV code;
PerlIOScalar *s = PerlIOSelf(f, PerlIOScalar);
/* If called (normally) via open() then arg is ref to scalar we are
* using, otherwise arg (from binmode presumably) is either NULL
* or the _name_ of the scalar
*/
if (arg) {
if (SvROK(arg)) {
if (SvREADONLY(SvRV(arg)) && mode && *mode != 'r') {
if (ckWARN(WARN_LAYER))
Perl_warner(aTHX_ packWARN(WARN_LAYER), "%s", PL_no_modify);
SETERRNO(EINVAL, SS_IVCHAN);
return -1;
}
s->var = SvREFCNT_inc(SvRV(arg));
SvGETMAGIC(s->var);
if (!SvPOK(s->var) && SvOK(s->var))
(void)SvPV_nomg_const_nolen(s->var);
}
else {
s->var =
SvREFCNT_inc(perl_get_sv
(SvPV_nolen(arg), GV_ADD | GV_ADDMULTI));
}
}
else {
s->var = newSVpvn("", 0);
}
SvUPGRADE(s->var, SVt_PV);
code = PerlIOBase_pushed(aTHX_ f, mode, Nullsv, tab);
if (!SvOK(s->var) || (PerlIOBase(f)->flags) & PERLIO_F_TRUNCATE)
SvCUR_set(s->var, 0);
if ((PerlIOBase(f)->flags) & PERLIO_F_APPEND)
s->posn = SvCUR(s->var);
else
s->posn = 0;
return code;
}
