added type conversion functions and creation from nullptr

1 files changed, 106 insertions, 9 deletions

diff --git a/src/core/variant/Variant.cpp b/src/core/variant/Variant.cpp
index c86905c..d33cd4f 100644
--- a/src/core/variant/Variant.cpp
+++ b/src/core/variant/Variant.cpp
@@ -16,10 +16,26 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include <sstream>
+
+#include <core/Utils.hpp>
+
 #include "Variant.hpp"
 
 namespace ousia {
 
+/* Class Variant::TypeException */
+
+Variant::TypeException::TypeException(Type actualType, Type requestedType)
+    : OusiaException(std::string("Variant: Requested \"") +
+                     Variant::getTypeName(requestedType) +
+                     std::string("\" but is \"") +
+                     Variant::getTypeName(actualType) + std::string("\"")),
+      actualType(actualType),
+      requestedType(requestedType)
+{
+}
+
 /* Class Variant */
 
 const char *Variant::getTypeName(Type type)
@@ -32,7 +48,7 @@ const char *Variant::getTypeName(Type type)
 		case Type::INT:
 			return "integer";
 		case Type::DOUBLE:
-			return "number";
+			return "double";
 		case Type::STRING:
 			return "string";
 		case Type::ARRAY:
@@ -43,16 +59,97 @@ const char *Variant::getTypeName(Type type)
 	return "unknown";
 }
 
-/* Class VariantTypeException */
+Variant::boolType Variant::toBool() const
+{
+	switch (getType()) {
+		case Type::NULLPTR:
+			return false;
+		case Type::BOOL:
+			return asBool();
+		case Type::INT:
+			return asInt() != 0;
+		case Type::DOUBLE:
+			return asDouble() != 0.0;
+		case Type::STRING:
+			return true;
+		case Type::ARRAY:
+			return true;
+		case Type::MAP:
+			return true;
+	}
+	return false;
+}
 
-Variant::TypeException::TypeException(Type actualType, Type requestedType)
-    : OusiaException(std::string("Variant: Requested \"") +
-                     Variant::getTypeName(actualType) +
-                     std::string("\" but is \"") +
-                     Variant::getTypeName(requestedType) + std::string("\"")),
-      actualType(actualType),
-      requestedType(requestedType)
+Variant::intType Variant::toInt() const
 {
+	switch (getType()) {
+		case Type::NULLPTR:
+			return 0;
+		case Type::BOOL:
+			return asBool() ? 1 : 0;
+		case Type::INT:
+			return asInt();
+		case Type::DOUBLE:
+			return asDouble();
+		case Type::STRING:
+			return 0; // TODO: Parse string as int
+		case Type::ARRAY: {
+			const arrayType &a = asArray();
+			return (a.size() == 1) ? a[0].toInt() : 0;
+		}
+		case Type::MAP:
+			return 0;
+	}
+	return false;
 }
+
+Variant::doubleType Variant::toDouble() const
+{
+	switch (getType()) {
+		case Type::NULLPTR:
+			return 0.0;
+		case Type::BOOL:
+			return asBool() ? 1.0 : 0.0;
+		case Type::INT:
+			return asInt();
+		case Type::DOUBLE:
+			return asDouble();
+		case Type::STRING:
+			return 0.0; // TODO: Parse string as double
+		case Type::ARRAY: {
+			const arrayType &a = asArray();
+			return (a.size() == 1) ? a[0].toDouble() : 0;
+		}
+		case Type::MAP:
+			return 0;
+	}
+	return false;
+}
+
+Variant::stringType Variant::toString(bool escape) const
+{
+	switch (getType()) {
+		case Type::NULLPTR:
+			return "null";
+		case Type::BOOL:
+			return asBool() ? "true" : "false";
+		case Type::INT:
+			return std::to_string(asInt());
+		case Type::DOUBLE:
+			return std::to_string(asDouble());
+		case Type::STRING: {
+			// TODO: Use proper serialization function
+			std::stringstream ss;
+			ss << "\"" << asString() << "\"";
+			return ss.str();
+		}
+		case Type::ARRAY:
+			return Utils::join(asArray(), ", ", "[", "]");
+		case Type::MAP:
+			return Utils::join(asMap(), ", ", "{", "}");
+	}
+	return "";
+}
+
 }