Added handy static method SizeOfType().

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31538 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/shared/Variant.h

@@ -73,6 +73,8 @@ public:
 			void*				ToPointer() const;
 			const char*			ToString() const;
 
+	static	size_t				SizeOfType(uint32 type);
+
 private:
 			void				_SetTo(const BVariant& other);
 			void				_SetTo(int8 value);

src/kits/shared/Variant.cpp

@@ -220,6 +220,38 @@ BVariant::_SetTo(const BVariant& other)
 }
 
 
+/*static*/ size_t
+BVariant::SizeOfType(uint32 type)
+{
+	switch (type) {
+		case B_INT8_TYPE:
+			return 1;
+		case B_UINT8_TYPE:
+			return 1;
+		case B_INT16_TYPE:
+			return 2;
+		case B_UINT16_TYPE:
+			return 2;
+		case B_INT32_TYPE:
+			return 4;
+		case B_UINT32_TYPE:
+			return 4;
+		case B_INT64_TYPE:
+			return 8;
+		case B_UINT64_TYPE:
+			return 8;
+		case B_FLOAT_TYPE:
+			return sizeof(float);
+		case B_DOUBLE_TYPE:
+			return sizeof(double);
+		case B_POINTER_TYPE:
+			return sizeof(void*);
+		default:
+			return 0;
+	}
+}
+
+
 void
 BVariant::_SetTo(int8 value)
 {