qalc

2026-03-04 20:06:58 +01:00
parent 5c428b211f
commit a2c9ad6e29
3 changed files with 72 additions and 0 deletions
@@ -0,0 +1,52 @@
+#include "qalculator.hpp"
+
+#include <libqalculate/qalculate.h>
+
+namespace ZShell {
+
+Qalculator::Qalculator(QObject* parent)
+	: QObject(parent) {
+	if (!CALCULATOR) {
+		new Calculator();
+		CALCULATOR->loadExchangeRates();
+		CALCULATOR->loadGlobalDefinitions();
+		CALCULATOR->loadLocalDefinitions();
+	}
+}
+
+QString Qalculator::eval(const QString& expr, bool printExpr) const {
+	if (expr.isEmpty()) {
+		return QString();
+	}
+
+	EvaluationOptions eo;
+	PrintOptions po;
+
+	std::string parsed;
+	std::string result = CALCULATOR->calculateAndPrint(
+		CALCULATOR->unlocalizeExpression(expr.toStdString(), eo.parse_options), 100, eo, po, &parsed);
+
+	std::string error;
+	while (CALCULATOR->message()) {
+		if (!CALCULATOR->message()->message().empty()) {
+			if (CALCULATOR->message()->type() == MESSAGE_ERROR) {
+				error += "error: ";
+			} else if (CALCULATOR->message()->type() == MESSAGE_WARNING) {
+				error += "warning: ";
+			}
+			error += CALCULATOR->message()->message();
+		}
+		CALCULATOR->nextMessage();
+	}
+	if (!error.empty()) {
+		return QString::fromStdString(error);
+	}
+
+	if (printExpr) {
+		return QString("%1 = %2").arg(parsed).arg(result);
+	}
+
+	return QString::fromStdString(result);
+}
+
+} // namespace ZShell