void Assembler::translate(std::ostream& out) const {
// PRE: The symbol table has been populated by the constructor.
Parser p(input_filename_);
Code c;
while (p.hasMoreCommands()) {
p.advance();
switch (p.commandType()) {
case A_COMMAND:
{
std::string s = p.symbol(); // immediate or a memory position
std::bitset<16> addr; // defined by a symbol.
if (isdigit(s.front())) { // Starts with a number => immediate.
addr = c.immediate(s);
}
else { // Reference to a variable.
assert(symbol_table_.count(s));
addr = symbol_table_.at(s);
}
out << std::bitset<16>(addr) << std::endl;
break;
}
case C_COMMAND:
{
std::bitset<16> dest(c.dest(p.dest())); // All the codes are stored
std::bitset<16> jump(c.jump(p.jump())); // with an appropriate padding
std::bitset<16> comp(c.comp(p.comp())); // to OR them and call it done.
std::bitset<16> instr(comp | dest | jump);
out << instr << std::endl;
break;
}
case L_COMMAND:
break;
}
}
}
int main(int argc, char *argv[])
{
string ar(argv[1]);
string goPerl = "perl perl.pl "+ar;
system(goPerl.c_str());
Parser p("out.txt");
Code code;
SymbolTable myTable;
int address = 16;
int counter = 0;
//Записали в таблицу все лейбы
while(p.advance())
{
char Type = p.commandType();
switch(Type)
{
case 'A' :
++counter;
break;
case 'C' :
++counter;
break;
case 'L' :
if(p.removeBKT(), !myTable.contains(p.aSymbol()) )
{
myTable.addEntry(p.aSymbol(), counter);
}
break;
}
}
p.backFile(); //Вернуть указатель на начало файла
//Записали в таблицу все А-переменные
while(p.advance())
{
char Type = p.commandType();
switch(Type)
{
case 'A' :
if( p.aIsSymbol() && !myTable.contains(p.aSymbol()) && !p.aIsUpper() )
{
myTable.addEntry(p.aSymbol(), address);
++address;
}
break;
}
}
p.backFile(); //Вернуть указатель на начало файла
ofstream ofs("out.hack");
//Заменили все значения битами
while(p.advance())
{
char Type = p.commandType();
switch(Type)
{
case 'A' :
p.aIsSymbol() ? ofs << bitset<16>( myTable.getAddress(p.aSymbol()) ) << "\n" : ofs << bitset<16>( p.aInteger() ) << "\n";
break;
case 'C' :
ofs << "111"
<< code.comp(p.comp())
<< code.dest(p.dest())
<< code.jump(p.jump())
<< "\n";
break;
}
}
}
