Evaluate C define expressions using postfix evaluation, and rename 'asm' to 'parseutil'

parseutil.h

@@ -0,0 +1,43 @@
+#ifndef PARSEUTIL_H
+#define PARSEUTIL_H
+
+#include <QString>
+#include <QList>
+
+enum TokenType {
+    Number,
+    Operator,
+};
+
+class Token {
+public:
+    Token(QString value = "", QString type = "") {
+        this->value = value;
+        this->type = TokenType::Operator;
+        if (type == "decimal" || type == "hex") {
+            this->type = TokenType::Number;
+            this->operatorPrecedence = -1;
+        } else if (type == "operator") {
+            this->operatorPrecedence = precedenceMap[value];
+        }
+    }
+    static QMap<QString, int> precedenceMap;
+    QString value;
+    TokenType type;
+    int operatorPrecedence; // only relevant for operator tokens
+};
+
+class ParseUtil
+{
+public:
+    ParseUtil();
+    void strip_comment(QString*);
+    QList<QStringList>* parseAsm(QString);
+    int evaluateDefine(QString, QMap<QString, int>*);
+private:
+    QList<Token> tokenizeExpression(QString expression, QMap<QString, int>* knownIdentifiers);
+    QList<Token> generatePostfix(QList<Token> tokens);
+    int evaluatePostfix(QList<Token> postfix);
+};
+
+#endif // PARSEUTIL_H