Display ascii char in return value.

mix/ContractCallDataEncoder.cpp

@@ -159,6 +159,10 @@ dev::bytes ContractCallDataEncoder::decodeBytes(dev::bytes const& _rawValue)
 
 QString ContractCallDataEncoder::toString(dev::bytes const& _b)
 {
+	QString str;
+	if (isString(_b, str))
+		return "- " + str +  " - " + QString::fromStdString(dev::toJS(_b));
+	else
 		return QString::fromStdString(dev::toJS(_b));
 }
 
@@ -197,3 +201,18 @@ QStringList ContractCallDataEncoder::decode(QList<QVariableDeclaration*> const&
 	}
 	return r;
 }
+
+
+bool ContractCallDataEncoder::isString(dev::bytes const& _b, QString& _str)
+{
+	dev::bytes bunPad = unpadded(_b);
+	for (unsigned i = 0; i < bunPad.size(); i++)
+	{
+		u256 value(bunPad.at(i));
+		if (value > 127)
+			return false;
+		else
+			_str += QString::fromStdString(dev::toJS(bunPad.at(i))).replace("0x", "");
+	}
+	return true;
+}

mix/ContractCallDataEncoder.h

@@ -66,6 +66,7 @@ private:
 	dev::bytes encodeBytes(QString const& _str);
 	dev::bytes decodeBytes(dev::bytes const& _rawValue);
 	QString toString(dev::bytes const& _b);
+	bool isString(dev::bytes const& _b, QString& _str);
 
 private:
 	bytes m_encodedData;