sv_set

source of perl for linux application,

################################################################################
##
##  $Revision: 5 $
##  $Author: mhx $
##  $Date: 2007/01/02 12:32:29 +0100 $
##
################################################################################
##
##  Version 3.x, Copyright (C) 2004-2007, 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

__UNDEFINED__

=implementation

__UNDEFINED__ SvMAGIC_set(sv, val) \
                STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
                (((XPVMG*) SvANY(sv))->xmg_magic = (val)); } STMT_END

#if { VERSION < 5.9.3 }

__UNDEFINED__ SvPVX_const(sv)     ((const char*) (0 + SvPVX(sv)))
__UNDEFINED__ SvPVX_mutable(sv)   (0 + SvPVX(sv))

__UNDEFINED__ SvRV_set(sv, val) \
                STMT_START { assert(SvTYPE(sv) >=  SVt_RV); \
                (((XRV*) SvANY(sv))->xrv_rv = (val)); } STMT_END

#else

__UNDEFINED__ SvPVX_const(sv)     ((const char*)((sv)->sv_u.svu_pv))
__UNDEFINED__ SvPVX_mutable(sv)   ((sv)->sv_u.svu_pv)

__UNDEFINED__ SvRV_set(sv, val) \
                STMT_START { assert(SvTYPE(sv) >=  SVt_RV); \
                ((sv)->sv_u.svu_rv = (val)); } STMT_END

#endif

__UNDEFINED__ SvSTASH_set(sv, val) \
                STMT_START { assert(SvTYPE(sv) >= SVt_PVMG); \
                (((XPVMG*) SvANY(sv))->xmg_stash = (val)); } STMT_END

#if { VERSION < 5.004 }

__UNDEFINED__ SvUV_set(sv, val) \
                STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
                (((XPVIV*) SvANY(sv))->xiv_iv = (IV) (val)); } STMT_END

#else

__UNDEFINED__ SvUV_set(sv, val) \
                STMT_START { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
                (((XPVUV*) SvANY(sv))->xuv_uv = (val)); } STMT_END

#endif

=xsubs

IV
TestSvUV_set(sv, val)
	SV *sv
	UV val
	CODE:
		SvUV_set(sv, val);
		RETVAL = SvUVX(sv) == val ? 42 : -1;
	OUTPUT:
		RETVAL

IV
TestSvPVX_const(sv)
        SV *sv
        CODE:
                RETVAL = strEQ(SvPVX_const(sv), "mhx") ? 43 : -1;
        OUTPUT:
                RETVAL

IV
TestSvPVX_mutable(sv)
        SV *sv
        CODE:
                RETVAL = strEQ(SvPVX_mutable(sv), "mhx") ? 44 : -1;
        OUTPUT:
                RETVAL

void
TestSvSTASH_set(sv, name)
        SV *sv
	char *name
        CODE:
		sv = SvRV(sv);
		SvREFCNT_dec(SvSTASH(sv));
                SvSTASH_set(sv, (HV*) SvREFCNT_inc(gv_stashpv(name, 0)));

=tests plan => 5

my $foo = 5;
ok(&Devel::PPPort::TestSvUV_set($foo, 12345), 42);
ok(&Devel::PPPort::TestSvPVX_const("mhx"), 43);
ok(&Devel::PPPort::TestSvPVX_mutable("mhx"), 44);

my $bar = [];

bless $bar, 'foo';
ok($bar->x(), 'foobar');

Devel::PPPort::TestSvSTASH_set($bar, 'bar');
ok($bar->x(), 'hacker');

package foo;

sub x { 'foobar' }

package bar;

sub x { 'hacker' }