const char * Nes_State_Reader::begin( Auto_File_Reader dr, Nes_State* out )
{
state_ = out;
if ( !out )
CHECK_ALLOC( state_ = owned = BLARGG_NEW Nes_State );
RETURN_ERR( Nes_File_Reader::begin( dr ) );
if ( block_tag() != state_file_tag )
return "Not a state snapshot file";
return 0;
}
blargg_err_t Nes_Snapshot_Reader::begin( Data_Reader* dr, Nes_Snapshot* out )
{
snapshot_ = out;
if ( !out )
{
BLARGG_RETURN_ERR( snapshots.resize( 1 ) );
snapshot_ = &snapshots [0];
}
BLARGG_RETURN_ERR( Nes_File_Reader::begin( dr ) );
if ( block_tag() != snapshot_file_tag )
return "Not a snapshot file";
return blargg_success;
}