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package Compiler;
import java.util.ArrayList;
import java.util.List;
import Compiler.Expression.*;
import Compiler.Statement.*;
public class Translator{
List<String> CCode = new ArrayList<>();
private Environment environment = new Environment();
public List<String> compileToC(List<Statement> statements){
CCode.add("#include <stdio.h>");
CCode.add("int main(){");
try{
for (Statement statement: statements){
evaluateStatement(statement);
}
} catch (Error e){
}
CCode.add("}");
for(String t:CCode){
System.out.println(t);
}
System.out.println("");
return CCode;
}
private void evaluateStatement(Statement statement){
switch(statement.getStatmentType()){
case "exprStmt":
evalExpressionStatement((ExpressionStatement)statement);
break;
case "vardec":
evalVariableDeclaration((VariableDeclaration)statement);
break;
case "print":
evalPrintStatement((PrintStatement)statement);
break;
case "ifStmt":
evalIfStatement((IfStatement)statement);
break;
}
}
private void evalExpressionStatement(ExpressionStatement stmt){
evaluateExpression(stmt.expr);
}
private void evalVariableDeclaration(VariableDeclaration vardec){
environment.defineVariable(vardec.name.text, null);
CCode.add("int "+vardec.name.text+";");
}
private void evalPrintStatement(PrintStatement print){
CCode.add("printf(\"%d\","+evaluateExpression(print.expr)+");");
}
private void evalIfStatement(IfStatement ifstatement){
CCode.add("if("+evaluateExpression(ifstatement.condition)+"){");
for(Statement s:ifstatement.statements) {
evaluateStatement(s);
}
if(ifstatement.elseStatements.size()>0){
CCode.add("}");
CCode.add("else {");
for(Statement s:ifstatement.elseStatements) {
evaluateStatement(s);
}
}
CCode.add("}");
}
private String evaluateExpression(Expression expression){
switch(expression.getExpressionType()){
case "binary":
return evaluateBinaryExpression((Binary)expression);
case "literal":
return evaluateLiteralExpression((Literal)expression);
case "bracket":
return evaluateBracketedExpression((BracketedExpression)expression);
case "assign":
evaluateAssignmentExpression((AssignmentExpression)expression);
return "";
case "var":
return evaluateVariableExpression((Variable)expression);
default:
return null;
}
}
private String evaluateBinaryExpression(Binary expr){
switch (expr.op.type){
case PLUS:
//return "leftEval+rightEval"
return evaluateExpression(expr.left)+"+"+evaluateExpression(expr.right);
case STAR:
return evaluateExpression(expr.left)+"*"+evaluateExpression(expr.right);
case MINUS:
return evaluateExpression(expr.left)+"-"+evaluateExpression(expr.right);
case SLASH:
return evaluateExpression(expr.left)+"/"+evaluateExpression(expr.right);
case GREATER:
return evaluateExpression(expr.left)+">"+evaluateExpression(expr.right);
case LESS:
return evaluateExpression(expr.left)+"<"+evaluateExpression(expr.right);
case EQUALITY:
return evaluateExpression(expr.left)+"=="+evaluateExpression(expr.right);
default:
break;
}
return null;
}
private String evaluateLiteralExpression(Literal expr){
return (expr.value.value).toString();
}
private String evaluateBracketedExpression(BracketedExpression expr){
return evaluateExpression(expr.expr);
}
private void evaluateAssignmentExpression(AssignmentExpression expr){
Object assignedValue = evaluateExpression(expr.value);
environment.assignVariable(expr.name.text, assignedValue);
CCode.add(expr.name.text+"="+evaluateExpression(expr.value)+";");
}
private String evaluateVariableExpression(Variable expr){
return expr.name.text;
}
}
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