blargg_err_t Nes_Cart::load_ines( Auto_File_Reader in )
{
RETURN_ERR( in.open() );
ines_header_t h;
RETURN_ERR( in->read( &h, sizeof h ) );
if ( 0 != memcmp( h.signature, "NES\x1A", 4 ) )
return not_ines_file;
if ( h.zero [7] ) // handle header defaced by a f*****g idiot's handle
h.flags2 = 0;
set_mapper( h.flags, h.flags2 );
if ( h.flags & 0x04 ) // skip trainer
RETURN_ERR( in->skip( 512 ) );
RETURN_ERR( resize_prg( h.prg_count * 16 * 1024L ) );
RETURN_ERR( resize_chr( h.chr_count * 8 * 1024L ) );
RETURN_ERR( in->read( prg(), prg_size() ) );
RETURN_ERR( in->read( chr(), chr_size() ) );
return 0;
}
blargg_err_t Nes_Cart::apply_ips_to_prg( Auto_File_Reader patch )
{
RETURN_ERR( patch.open() );
long size = prg_size();
byte* prg_copy = (byte*) malloc( size );
CHECK_ALLOC( prg_copy );
memcpy( prg_copy, prg(), size );
const char* err = apply_ips_patch( *patch, &prg_copy, &size );
if ( !err )
{
resize_prg( size );
memcpy( prg(), prg_copy, size );
}
free( prg_copy );
return err;
}
blargg_err_t Nes_Rom::load_ines_rom( Data_Reader& in )
{
ines_header_t h;
BLARGG_RETURN_ERR( in.read( &h, sizeof h ) );
if ( 0 != memcmp( h.signature, "NES\x1A", 4 ) )
return "Not a iNES ROM file";
if ( h.zero [7] ) // handle header defaced by a f*****g idiot's handle
h.flags2 = 0;
set_mapper( h.flags, h.flags2 );
if ( h.flags & 0x04 ) // skip trainer
BLARGG_RETURN_ERR( in.skip( 512 ) );
BLARGG_RETURN_ERR( resize_prg( h.prg_count * 16 * 1024L ) );
BLARGG_RETURN_ERR( resize_chr( h.chr_count * 8 * 1024L ) );
BLARGG_RETURN_ERR( in.read( prg(), prg_size() ) );
BLARGG_RETURN_ERR( in.read( chr(), chr_size() ) );
return blargg_success;
}