void write_io(const uint16_t address, const uint8_t value, Gameboy* const gb)
{
debug_printf("Hardware I/O: write $%X to $%X\n", value, address);
if (address >= 0xFF10 && address <= 0xFF3F) {
write_apu_register(address, value, &gb->apu);
return;
}
switch (address) {
case 0xFF00: write_joypad(value, &gb->joypad); break;
case 0xFF04: write_div(value, &gb->hwstate); break;
case 0xFF05: gb->hwstate.tima = value; break;
case 0xFF06: gb->hwstate.tma = value; break;
case 0xFF07: write_tac(value, &gb->hwstate); break;
case 0xFF0F: gb->hwstate.int_flags = value&0x1F; break;
case 0xFF40: write_lcdc(value, &gb->ppu, &gb->hwstate); break;
case 0xFF41: write_stat(value, &gb->ppu); break;
case 0xFF42: gb->ppu.scy = value; break;
case 0xFF43: gb->ppu.scx = value; break;
case 0xFF44: gb->ppu.ly = 0x00; break;
case 0xFF45: gb->ppu.lyc = value; break;
case 0xFF46: dma_transfer(value, gb); break;
case 0xFF47: write_palette(value, &gb->ppu.bgp); break;
case 0xFF48: write_palette(value, &gb->ppu.obp0); break;
case 0xFF49: write_palette(value, &gb->ppu.obp1); break;
case 0xFF4A: gb->ppu.wy = value; break;
case 0xFF4B: gb->ppu.wx = value; break;
default: break;
}
}
int statement()
{
int es = 0;
if (es == 0 && strcmp(token, "if") == 0) es = if_stat();//<IF语句>
if (es == 0 && strcmp(token, "while") == 0) es = while_stat();//<while语句>
if (es == 0 && strcmp(token, "for") == 0) es = for_stat();//<for语句>
//可在此处添加do语句调用
if (es == 0 && strcmp(token, "read") == 0) es = read_stat();//<read语句>
if (es == 0 && strcmp(token, "write") == 0) es = write_stat();//<write语句>
if (es == 0 && strcmp(token, "{") == 0) es = compound_stat();//<复合语句>
if (es == 0 && (strcmp(token, "ID") == 0 || strcmp(token, "NUM") == 0 || strcmp(token, "(") == 0)) es = expression_stat();//<表达式语句>
return(es);
}
void stat(){
if (lookahead == INTEGER || lookahead == STRING || lookahead == BOOLEAN || lookahead == TABLE)
def_stat();
else if (lookahead == ID)
assign_stat();
else if (lookahead == IF)
if_stat();
else if (lookahead == WHILE)
while_stat();
else if (lookahead == READ)
read_stat();
else //(lookahead == WRITE)
write_stat();
}
static void
do_fstat(os_emul_data *emul,
unsigned call,
const int arg0,
cpu *processor,
unsigned_word cia)
{
int fd = cpu_registers(processor)->gpr[arg0];
unsigned_word stat_buf_addr = cpu_registers(processor)->gpr[arg0+1];
struct stat buf;
int status;
SYS(fstat);
/* Can't combine these statements, cuz fstat sets errno. */
status = fstat(fd, &buf);
emul_write_status(processor, status, errno);
write_stat(stat_buf_addr, buf, processor, cia);
}
static void
do_lstat(os_emul_data *emul,
unsigned call,
const int arg0,
cpu *processor,
unsigned_word cia)
{
char path_buf[PATH_MAX];
unsigned_word path_addr = cpu_registers(processor)->gpr[arg0];
char *path = emul_read_string(path_buf, path_addr, PATH_MAX, processor, cia);
unsigned_word stat_buf_addr = cpu_registers(processor)->gpr[arg0+1];
struct stat buf;
int status;
SYS(lstat);
/* Can't combine these statements, cuz lstat sets errno. */
status = lstat(path, &buf);
emul_write_status(processor, status, errno);
write_stat(stat_buf_addr, buf, processor, cia);
}
static void
do_stat(os_emul_data *emul,
unsigned call,
const int arg0,
cpu *processor,
unsigned_word cia)
{
char path_buf[PATH_MAX];
unsigned_word path_addr = cpu_registers(processor)->gpr[arg0];
unsigned_word stat_buf_addr = cpu_registers(processor)->gpr[arg0+1];
char *path = emul_read_string(path_buf, path_addr, PATH_MAX, processor, cia);
struct stat buf;
int status;
SYS(stat);
status = stat(path, &buf);
emul_write_status(processor, status, errno);
if (status == 0)
write_stat(stat_buf_addr, buf, processor, cia);
}
/*Genera il codice per il nodo stat_list e crea lo scope del programma*/
Code stat_list(Pnode stat_list_node){
//Definisco la variabile che contiene il codice da ritornare
Code stat_list_code;
stat_list_code.head = NULL;
stat_list_code.tail = NULL;
stat_list_code.size = 0;
//Creo l'ambiente del programma
push_environment();
//Punto al primo stat
Pnode stat_node = stat_list_node->child;
//Ciclo lungo tutti gli stat_node
while (stat_node!=NULL){
//Creo il codice dello stat_node
Code stat_code;
switch (stat_node->type){
case(N_DEF_STAT): stat_code = def_stat(stat_node);break;
case(N_ASSIGN_STAT): stat_code = assign_stat(stat_node);break;
case(N_IF_STAT): stat_code = if_stat(stat_node);break;
case(N_WHILE_STAT): stat_code = while_stat(stat_node);break;
case(N_READ_STAT): stat_code = read_stat(stat_node);break;
case(N_WRITE_STAT): stat_code = write_stat(stat_node);break;
}
//Appendo il codice a stat_list_code
stat_list_code = appcode(stat_list_code,stat_code);
//Punto al fratello successivo
stat_node = stat_node->brother;
}
//Appendo il codice per fare il pop dell'environment a stat_list_code
if(numobj_in_current_env()!=0)
stat_list_code = appcode(stat_list_code,makecode1(T_POP,numobj_in_current_env()));
//elimino l'ambiente creato (elimina già le variabili dall'ambiente)
pop_environment();
return stat_list_code;
}
Code stat(Pnode p)
{
switch (p->type)
{
case N_DEF_STAT:
return def_stat(p);
case N_ASSIGN_STAT:
return assign_stat(p);
case N_IF_STAT:
return if_stat(p);
case N_WHILE_STAT:
return while_stat(p);
case N_READ_STAT:
return read_stat(p);
case N_WRITE_STAT:
return write_stat(p);
default:
noderror(p);
}
return endcode();
}
