From cde848ce1eb995170723f6f070b9fcba0dfdb880 Mon Sep 17 00:00:00 2001
From: Adrian Kummerländer
Date: Sat, 5 Jan 2013 22:30:35 +0100
Subject: Moved node classes into separate compilation unit; File extension
 change

---
 src/nodes.cc | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 src/nodes.cc

(limited to 'src/nodes.cc')

diff --git a/src/nodes.cc b/src/nodes.cc
new file mode 100644
index 0000000..70b9e50
--- /dev/null
+++ b/src/nodes.cc
@@ -0,0 +1,77 @@
+#include "nodes.h"
+#include "exceptions.h"
+
+#include <cmath>
+#include <sstream>
+#include <limits>
+
+namespace SimpleParser {
+
+OperandNode::OperandNode(double val) {
+	this->value_ = val;
+}
+
+double OperandNode::solve() {
+	return this->value_;
+}
+
+NodeType OperandNode::getType() {
+	return OPERAND_NODE;
+}
+
+std::string OperandNode::print() {
+	std::stringstream convertStream;
+	convertStream.precision(std::numeric_limits<double>::digits10);
+
+	convertStream << this->value_;
+
+	return convertStream.str();
+}
+
+OperatorNode::OperatorNode(char op) {
+	this->function_ = op;
+}
+
+double OperatorNode::solve() {
+	switch ( this->function_ ) {
+		case '*': {
+			return this->leftChild->solve() * this->rightChild->solve();
+		}
+		case '/': {
+			double rightChild = this->rightChild->solve();
+			
+			if ( rightChild != 0 ) {
+				return this->leftChild->solve() / rightChild;
+			}
+			else {
+				throw divide_exception();
+			}
+		}
+		case '+': {
+			return this->leftChild->solve() + this->rightChild->solve();
+		}
+		case '-': {
+			return this->leftChild->solve() - this->rightChild->solve();
+		}
+		case '^': {
+			return std::pow( this->leftChild->solve(), this->rightChild->solve() );
+		}
+		default: {
+			throw operator_exception();
+		}
+	}
+}
+
+NodeType OperatorNode::getType() {
+	return OPERATOR_NODE;
+}
+
+std::string OperatorNode::print() {
+	return std::string(1, this->function_);
+}
+
+char OperatorNode::getFunction() {
+	return this->function_;
+}
+
+}
-- 
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