// While loop handles the basic cases like declare while loop for i<10, iterate until i less than
// ten and j less than 20
private void while_loop() {
VarSymbol v = null;
FuncSymbol f = null;
int index =
input.indexOf(
words.get(wordLoc)); // Index in input string at which the word was encountered
index += (words.get(wordLoc).length() + 1);
String str = input.substring(index); // Further processing will be done on this string
tokens = str.split("[ ]+");
String expString = "";
tIndex = 0;
while (true) {
if ((v = Controller.varSym.searchSymbol(tokens[tIndex]))
!= null /*TODO Check whether token is a number*/) {
expString = searchExpression();
if (words.get(wordLoc).indexOf("until") != -1)
code.setCodeText("while(!(" + expString + "))");
else code.setCodeText("while(" + expString + ")");
code.setErrCode(IErrorCodes.SUCCESS);
code.setErrParam(null);
break;
} else if ((f = Controller.funSym.searchSymbol(tokens[tIndex])) != null) {
int tempIndex = input.indexOf(tokens[tIndex]);
expString = exp.generateExpression(input.substring(tempIndex));
if (words.get(wordLoc).indexOf("until") != -1)
code.setCodeText("while(!(" + expString + "))");
else code.setCodeText("while(" + expString + ")");
code.setErrCode(IErrorCodes.SUCCESS);
code.setErrParam(null);
break;
} else if ((tokens[tIndex].equals("true") || tokens[tIndex].equals("true"))
&& tIndex + 1 == tokens.length) {
code.setCodeText("while(" + tokens[tIndex] + ")");
}
}
}
private void for_loop() {
VarSymbol v = null, tempVar = null;
FuncSymbol f = null, tempFunc = null;
int index =
input.indexOf(
words.get(wordLoc)); // Index in input string at which the word was encountered
String expString = "";
index += (words.get(wordLoc).length() + 1);
String str = input.substring(index); // Further processing will be done on this string
tokens = str.split("[ ]+");
index = 0;
boolean flag = false;
String expression = null;
String tempStr = null;
String loopCounter = "";
while (true) {
if ((v = Controller.varSym.searchSymbol(tokens[tIndex]))
!= null) /*|| (f = Controller.funSym.searchSymbol(tokens[tIndex])) != null*/ {
loopCounter = v.getVarName(); // Holds the loopCounter variable
expString = searchExpression();
expression = exp.generateExpression(expString);
tempVar = v;
} else if (tokens[tIndex].equalsIgnoreCase("to")) { // If next token is not an operator
loopParams[0] = expression;
tIndex++;
int tempNum = NumberGenerator.stringToNum(tokens[tIndex]);
// if((tempStr = String.valueOf(toNumber(tokens[tIndex++])))){ // TODO Method 'toNumber()'
// to be added later
if (String.valueOf(tempNum) != null) {
condition = tempStr;
loopParams[1] = loopCounter + "<" + condition;
} else if ((v = Controller.varSym.searchSymbol(tokens[tIndex])) != null
|| (Controller.funSym.searchSymbol(tokens[tIndex]) != null)) {
tempStr = searchExpression();
String tempString = exp.generateExpression(tempStr);
int len = v.getVarName().length();
if (tempString.startsWith(loopCounter) && tempString.charAt(len) == '=') {
condition = tempString.substring(len + 1);
loopParams[1] = loopCounter + "<" + condition;
} else {
condition = tempString;
loopParams[1] = condition;
}
}
} else if (tokens[tIndex].equalsIgnoreCase("increment")
|| (tokens[tIndex] + tokens[tIndex + 1]).equalsIgnoreCase("plusplus")
|| tokens[tIndex].equalsIgnoreCase("postincrement")
|| tokens[tIndex].equalsIgnoreCase("preincrement")) {
expression = exp.generateExpression((str.substring(str.indexOf(tokens[tIndex]))));
loopParams[2] = expression;
break;
} else if (tokens[tIndex].equalsIgnoreCase("decrement")
|| (tokens[tIndex] + tokens[tIndex + 1]).equalsIgnoreCase("minus minus")
|| tokens[tIndex].equalsIgnoreCase("postdecrement")
|| tokens[tIndex].equalsIgnoreCase("predecrement")) {
expression = exp.generateExpression((str.substring(str.indexOf(tokens[tIndex]))));
loopParams[2] = expression;
break;
}
/*if(searchOperator(tIndex) != -1){
//TODO Index variable missing error to be handled
}*/
/*
if(token is number){
number handling logic.
e.g : for loop 0 to 100.
}
*/
if ((tIndex) == tokens.length) {
break;
}
}
if (loopParams[2] == null) {
loopParams[2] = loopCounter + "++";
}
code.setCodeText("for(" + loopParams[0] + ";" + loopParams[1] + ";" + loopParams[2] + ")");
code.setErrCode(IErrorCodes.SUCCESS);
code.setErrParam(null);
}
