const char * Nes_State_::read_blocks( Nes_File_Reader& in )
{
while ( true )
{
RETURN_ERR( in.next_block() );
switch ( in.block_tag() )
{
case nes_state_t::tag:
memset( &nes, 0, sizeof nes );
RETURN_ERR( read_nes_state( in, &nes ) );
set_nes_state( nes );
break;
case cpu_state_t::tag: {
cpu_state_t s;
memset( &s, 0, sizeof s );
RETURN_ERR( read_nes_state( in, &s ) );
cpu->pc = s.pc;
cpu->sp = s.s;
cpu->a = s.a;
cpu->x = s.x;
cpu->y = s.y;
cpu->status = s.p;
cpu_valid = true;
break;
}
case ppu_state_t::tag:
memset( ppu, 0, sizeof *ppu );
RETURN_ERR( read_nes_state( in, ppu ) );
ppu_valid = true;
break;
case apu_state_t::tag:
memset( apu, 0, sizeof *apu );
RETURN_ERR( read_nes_state( in, apu ) );
apu_valid = true;
break;
case joypad_state_t::tag:
memset( joypad, 0, sizeof *joypad );
RETURN_ERR( read_nes_state( in, joypad ) );
joypad_valid = true;
break;
case FOUR_CHAR('MAPR'):
mapper->size = in.remain();
RETURN_ERR( in.read_block_data( mapper->data, sizeof mapper->data ) );
mapper_valid = true;
break;
case FOUR_CHAR('SPRT'):
spr_ram_valid = true;
RETURN_ERR( in.read_block_data( spr_ram, spr_ram_size ) );
break;
case FOUR_CHAR('NTAB'):
nametable_size = in.remain();
RETURN_ERR( in.read( nametable, 0x800 ) );
if ( nametable_size > 0x800 )
RETURN_ERR( in.read( chr, 0x800 ) );
break;
case FOUR_CHAR('LRAM'):
ram_valid = true;
RETURN_ERR( in.read_block_data( ram, ram_size ) );
break;
case FOUR_CHAR('CHRR'):
chr_size = in.remain();
RETURN_ERR( in.read_block_data( chr, chr_max ) );
break;
case FOUR_CHAR('SRAM'):
sram_size = in.remain();
RETURN_ERR( in.read_block_data( sram, sram_max ) );
break;
default:
return 0;
}
}
}
blargg_err_t Nes_Snapshot::read_blocks( Nes_File_Reader& in )
{
while ( true )
{
BLARGG_RETURN_ERR( in.next_block() );
switch ( in.block_tag() )
{
case nes.tag:
memset( &nes, 0, sizeof nes );
BLARGG_RETURN_ERR( read_nes_state( in, &nes ) );
set_nes_state( nes );
break;
case cpu_state_t::tag: {
cpu_state_t s;
memset( &s, 0, sizeof s );
BLARGG_RETURN_ERR( read_nes_state( in, &s ) );
cpu.pc = s.pc;
cpu.sp = s.s;
cpu.a = s.a;
cpu.x = s.x;
cpu.y = s.y;
cpu.status = s.p;
cpu_valid = true;
break;
}
case ppu.tag:
memset( &ppu, 0, sizeof ppu );
BLARGG_RETURN_ERR( read_nes_state( in, &ppu ) );
ppu_valid = true;
break;
case apu.tag:
memset( &apu, 0, sizeof apu );
BLARGG_RETURN_ERR( read_nes_state( in, &apu ) );
apu_valid = true;
break;
case joypad.tag:
memset( &joypad, 0, sizeof joypad );
BLARGG_RETURN_ERR( read_nes_state( in, &joypad ) );
joypad_valid = true;
break;
case 'MAPR':
mapper.size = in.remain();
BLARGG_RETURN_ERR( in.read_block_data( mapper.data, sizeof mapper.data ) );
mapper_valid = true;
break;
case 'SPRT':
spr_ram_valid = true;
BLARGG_RETURN_ERR( in.read_block_data( spr_ram, sizeof spr_ram ) );
break;
case 'NTAB':
nametable_size = in.remain();
BLARGG_RETURN_ERR( in.read_block_data( nametable, sizeof nametable ) );
break;
case 'LRAM':
ram_valid = true;
BLARGG_RETURN_ERR( in.read_block_data( ram, sizeof ram ) );
break;
case 'CHRR':
chr_size = in.remain();
BLARGG_RETURN_ERR( in.read_block_data( chr, sizeof chr ) );
break;
case 'SRAM':
sram_size = in.remain();
BLARGG_RETURN_ERR( in.read_block_data( sram, sizeof sram ) );
break;
default:
return blargg_success;
}
}
}
