Is there anyone who can translate this C++ code into Python code. I\'ve already

Question

Is there anyone who can translate this C++ code into Python code. I've already completed it, but I would like to see others ideas that they can bring to the table. Thank you for looking.

#include<fstream> #include<iostream> #include<string> #define CALL_STACK_MAX 200 using namespace std; enum cmdType {C_ARITHMETIC, C_PUSH, C_POP, C_LABEL, C_GOTO, C_IF, C_FUNCTION, C_RETURN, C_CALL}; class Parser{ fstream VM; int lineNumber; string currentCommand; public: Parser(char* filename){ VM.open(filename,ios::in); if(VM.fail()){ cout << filename << " cannot be found Please check whether you have entered the correct pathname "; getchar(); exit(0); } VM.unsetf(ios::skipws); lineNumber=0; } ~Parser(){VM.close();} bool hasMoreCommands(){ if(VM.fail()) return false; return true; } int advance(); cmdType commandType(); void argument(string&,int&); }; class CodeWriter{ fstream Asm; string fileName, funcName[CALL_STACK_MAX]; int trueCount,callCount,curFunction; public: CodeWriter(char* filename){ fileName=filename; string file=fileName; file.erase(file.size()-2,2); file+="asm"; Asm.open(file.c_str(),ios::out); fileName.erase(0,fileName.find_last_of('/')+1); trueCount=0; curFunction=0; callCount=0; } ~CodeWriter(){ Asm << "(INFINITE_LOOP) @INFINITE_LOOP 0;JEQ "; Asm.close(); } void writeInit(); void writeArithmetic(string); void writePushPop(cmdType,string,int); void writeLabel(string); void writeGoto(string); void writeIf(string); void writeCall(string,int); void writeReturn(); void writeFunction(string,int); }; int Parser::advance(){ char ch; string funcCommand; currentCommand.erase(0,currentCommand.size()); while(hasMoreCommands()){ VM >> ch; if(ch==' '){ if(currentCommand.size()!=0){lineNumber++; break;} else continue; } if(ch!=' '&&ch!=' '&&ch!=' '&&ch!=' '){currentCommand+=ch; funcCommand+=ch;} if(ch==' '||ch==' '){funcCommand+=' ';} if(currentCommand[currentCommand.size()-1]=='/'&&currentCommand[currentCommand.size()-2]=='/'){ currentCommand.erase(currentCommand.size()-2, 2); funcCommand.erase(funcCommand.size()-2,2); VM >> ch; while(ch!=' ') VM >> ch; if(currentCommand.size()!=0){ lineNumber++; break;} } } if(!hasMoreCommands()) return -1; if(commandType()==C_FUNCTION||commandType()==C_CALL) currentCommand=funcCommand; return 0; } cmdType Parser::commandType(){ if(currentCommand=="add"||currentCommand=="sub"||currentCommand=="neg"|| currentCommand=="and"||currentCommand=="not"||currentCommand=="eq"|| currentCommand=="gt"||currentCommand=="lt"||currentCommand=="or") return C_ARITHMETIC; if(currentCommand.find("push")==0) return C_PUSH; if(currentCommand.find("pop")==0) return C_POP; if(currentCommand.find("label")==0) return C_LABEL; if(currentCommand.find("goto")==0) return C_GOTO; if(currentCommand.find("if-goto")==0) return C_IF; if(currentCommand.find("function")==0) return C_FUNCTION; if(currentCommand.find("call")==0) return C_CALL; if(currentCommand=="return") return C_RETURN; cout << lineNumber << ": Invalid command "; getchar(); exit(0); } void Parser::argument(string& arg1, int& arg2){ string arg=currentCommand; if(commandType()==C_ARITHMETIC)arg1=arg; else if(commandType()==C_PUSH||commandType()==C_POP){ if(commandType()==C_PUSH) arg.erase(0,4); else arg.erase(0,3); if(arg.find("argument")==0) arg1="argument"; else if(arg.find("local")==0) arg1="local"; else if(arg.find("static")==0) arg1="static"; else if(arg.find("this")==0) arg1="this"; else if(arg.find("that")==0) arg1="that"; else if(arg.find("pointer")==0) arg1="pointer"; else if(arg.find("temp")==0) arg1="temp"; else if(arg.find("constant")==0) arg1="constant"; else { cout << lineNumber << ": Segment name missing in a Push/Pop instruction "; getchar(); exit(0); } arg.erase(0,arg1.size()); if(arg.size()==0) { cout << lineNumber << ": Segment index missing in a Push/Pop instruction "; getchar(); exit(0); } arg2=0; for(int i=0;i<arg.size();i++) arg2=(arg2*10+arg[i]-'0'); } else if(commandType()==C_LABEL){ arg.erase(0,5); arg1=arg; } else if(commandType()==C_GOTO){ arg.erase(0,4); arg1=arg; } else if(commandType()==C_IF){ arg.erase(0,7); arg1=arg; } else if(commandType()==C_FUNCTION||commandType()==C_CALL){ if(commandType()==C_FUNCTION) arg.erase(0,9); else arg.erase(0,5); arg1=arg; arg.erase(0,arg.find(" ")+1); arg1.erase(arg1.find(" "),arg.size()+1); if(arg.size()==0) { cout << lineNumber << ": Number of arguments not specified in a Function/Call instruction "; getchar(); exit(0); } arg2=0; for(int i=0;i<arg.size();i++) arg2=(arg2*10+arg[i]-'0'); } } void CodeWriter::writeInit(){ Asm << "@256 D=A @SP M=D )"; writeCall("Sys.init",0); } void CodeWriter::writeArithmetic(string command){ Asm << "@SP A=M-1 "; if(command=="neg") Asm << "M=-M "; else if(command=="not") Asm << "M=!M "; else{ Asm << "D=M @SP AM=M-1 M=0 A=A-1 "; if(command=="add") Asm << "M=M+D "; else if(command=="sub") Asm << "M=M-D "; else if(command=="and") Asm << "M=M&D "; else if(command=="or") Asm << "M=M|D "; else{ Asm << "D=M-D @TRUE" << trueCount << " D;J"; if(command=="eq") Asm << "EQ"; else if(command=="lt") Asm << "LT"; else if(command=="gt") Asm << "GT"; Asm << " @SP A=M-1 M=0 @FALSE" << trueCount << " 0;JEQ (TRUE" << trueCount << ") @SP A=M-1 M=-1 " << "(FALSE" << trueCount << ") "; trueCount++; } } } void CodeWriter::writePushPop(cmdType command, string segment, int index){ if(segment=="static"&&index>240){ cout << "Index of a static variable > 240 "; getchar(); exit(0); } string strIndex; strIndex+=(index+'0'); if(command==C_POP&&segment=="constant"){ cout << "Popping into a constant is invalid "; getchar(); exit(0); } if(segment=="local") Asm << "@LCL D=M"; else if(segment=="argument") Asm << "@ARG D=M"; else if(segment=="this") Asm << "@THIS D=M"; else if(segment=="that") Asm << "@THAT D=M"; else if(segment=="temp") Asm << "@5 D=A"; else if(segment=="pointer") Asm << "@3 D=A"; else if(segment=="static") Asm << "@" << fileName << "." << index << " D=A"; else if(segment=="constant"){ if(index==0||index==1) Asm << " D=" << index; else Asm << "@" << index << " D=A"; } if(segment!="static"&&segment!="constant"&&index!=0) Asm << " @" << index << " D=D+A"; if(command==C_PUSH){ if(segment=="constant") Asm << " @SP AM=M+1 A=A-1 M=D "; else Asm << " A=D D=M @SP AM=M+1 A=A-1 M=D "; } else Asm << " @R13 M=D @SP AM=M-1 D=M M=0 @R13 A=M M=D "; } void CodeWriter::writeLabel(string label){ Asm << "(" << funcName[curFunction-1] << "." << label << ") "; } void CodeWriter::writeGoto(string label){ Asm << "@" << funcName[curFunction-1] << "." << label << " 0;JMP "; } void CodeWriter::writeIf(string label){ Asm << "@SP A=M-1 D=M @" << funcName[curFunction-1] << "." << label << " D=D+1;JEQ "; } void CodeWriter::writeCall(string functionName,int numArgs){ callCount++; string pushString=" D=A @SP AM=M+1 A=A-1 M=D "; Asm << "@RETURN_ADDRESS." << callCount << pushString << "@LCL" << pushString << "@ARG" << pushString << "@THIS" << pushString << "@THAT" << pushString << "@SP D=A @" << numArgs << " D=D-A @5 D=D-A @ARG M=D " << "@SP D=A @LCL M=D "; writeGoto(functionName); Asm << "(" << "RETURN_ADDRESS." << callCount << ") "; funcName[curFunction++]=functionName; } void CodeWriter::writeReturn(){ Asm << "@LCL D=A @R13 M=D " << "@5 AD=D-A D=M @R14 M=D " << "@SP M=M-1 A=M D=M M=0 @ARG M=D " << "@ARG D=A+1 @SP M=D " << "@R13 D=M-1 @THAT M=D " << "@THIS DM=D-1 " << "@ARG DM=D-1 " << "@LCL DM=D-1 " << "@R14 A=M 0;JMP "; curFunction--; } void CodeWriter::writeFunction(string functionName, int numLocals){ Asm << "@" << numLocals << " D=A " << "(" << funcName[curFunction-1] << "." << functionName << ") " << "@" << funcName[curFunction-1] << "." << functionName << " " << "@SP AM=M+1 A=A-1 M=0 " << "D=D-1;JEQ"; } void translate(char* filename){ Parser p(filename); CodeWriter c(filename); while(p.hasMoreCommands()){ string command; int index=-1; if(p.advance()==-1) return; if(p.commandType()!=C_RETURN) p.argument(command, index); if(p.commandType()==C_ARITHMETIC){ if(index==-1) c.writeArithmetic(command); else{ cout << "Invalid Arithmetic Command "; getchar(); exit(0); } } else if(p.commandType()==C_PUSH||p.commandType()==C_POP) c.writePushPop(p.commandType(),command,index); } } int main(int argc, char** argv){ if(argc==2){ translate(argv[1]); cout << argv[1] << " successfully translated ";} else cout << "Correct Syntax is: ./VMtranslator.out <filename> "; getchar(); return 0; }

Explanation / Answer

Hi, I can do a high quality guaranteed A+ solution for you. Trust me once and I will help you forever. Just follow the instruction here: http://programmingtutor3.tk

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