jack-vm-translator/src/include/memory.h

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

Segment determineSegment(string segment)
{
    if (segment == "local")
        return Segment::LCL;
    if (segment == "argument")
        return Segment::ARG;
    if (segment == "this")
        return Segment::THIS;
    if (segment == "that")
        return Segment::THAT;
    if (segment == "static")
        return Segment::STATIC;
    if (segment == "temp")
        return Segment::TEMP;
    if (segment == "constant")
        return Segment::CONSTANT;

    return Segment::CONSTANT;
}

string translatePush(string filename, Segment segment, int index)
{
    stringstream output;

    switch (segment)
    {
    case LCL:
        output << "@" << index << endl;
        output << "D=A" << endl;
        output << "@LCL" << endl;
        output << "A=D+A" << endl;
        output << "D=M" << endl;
        break;
    case ARG:
        output << "@" << index << endl;
        output << "D=A" << endl;
        output << "@ARG" << endl;
        output << "A=D+A" << endl;
        output << "D=M" << endl;
        break;
    case THIS:
        output << "@" << index << endl;
        output << "D=A" << endl;
        output << "@THIS" << endl;
        output << "A=D+A" << endl;
        output << "D=M" << endl;
        break;
    case THAT:
        output << "@" << index << endl;
        output << "D=A" << endl;
        output << "@THAT" << endl;
        output << "A=D+A" << endl;
        output << "D=M" << endl;
        break;
    case STATIC:
        output << "@" << filename << "." << index << endl;
        output << "D=M" << endl;
        break;
    case TEMP:
        output << "@" << index + 5 << endl;
        output << "D=M" << endl;
        break;
    case CONSTANT:
    default:
        output << '@' << index << endl;
        output << "D=A" << endl;
        break;
    }

    output << "@SP" << endl;
    output << "A=M" << endl;
    output << "M=D" << endl;
    output << "@SP" << endl;
    output << "M=M+1" << endl;

    return output.str();
}

string translatePop(string filename, Segment segment, int index)
{
    stringstream output;

    switch (segment)
    {
    case LCL:
        output << "@" << index << endl;
        output << "D=A" << endl;
        output << "@LCL" << endl;
        output << "D=D+A" << endl;
        output << "@ADDR" << endl;
        output << "M=D" << endl;
        break;
    case ARG:
        output << "@" << index << endl;
        output << "D=A" << endl;
        output << "@ARG" << endl;
        output << "D=D+A" << endl;
        output << "@ADDR" << endl;
        output << "M=D" << endl;
        break;
    case THIS:
        output << "@" << index << endl;
        output << "D=A" << endl;
        output << "@THIS" << endl;
        output << "D=D+A" << endl;
        output << "@ADDR" << endl;
        output << "M=D" << endl;
        break;
    case THAT:
        output << "@" << index << endl;
        output << "D=A" << endl;
        output << "@THAT" << endl;
        output << "D=D+A" << endl;
        output << "@ADDR" << endl;
        output << "M=D" << endl;
        break;
    case STATIC:
        output << "@" << filename << "." << index << endl;
        output << "D=A" << endl;
        output << "@ADDR" << endl;
        output << "M=D" << endl;
        break;
    case TEMP:
        output << "@" << index + 5 << endl;
        output << "D=A" << endl;
        output << "@ADDR" << endl;
        output << "M=D" << endl;
        break;

    default:
        break;
    }

    output << "@SP" << endl;
    output << "M=M-1" << endl;
    output << "A=M" << endl;
    output << "D=M" << endl;
    output << "@ADDR" << endl;
    output << "A=M" << endl;
    output << "M=D" << endl;

    return output.str();
}