dynamicanyholder.h

很好用的网络封装库,不熟悉网络编程的人也可以使用。使用风格良好的标准c++编写。

	void convert(Int16& val) const
	{
		convertToSmaller(_val, val);
	}
	
	void convert(Int32& val) const
	{
		convertToSmaller(_val, val);
	}

	void convert(Int64& val) const
	{
		convertToSmaller(_val, val);
	}

	void convert(UInt8& val) const
	{
		convertSignedToUnsigned(_val, val);
	}

	void convert(UInt16& val) const
	{
		convertSignedToUnsigned(_val, val);
	}
	
	void convert(UInt32& val) const
	{
		convertSignedToUnsigned(_val, val);
	}

	void convert(UInt64& val) const
	{
		convertSignedToUnsigned(_val, val);
	}

	void convert(bool& val) const
	{
		val = !(_val <= std::numeric_limits<float>::min() && 
			_val >= -1 * std::numeric_limits<float>::min());
	}

	void convert(float& val) const
	{
		val = _val;
	}

	void convert(double& val) const
	{
		val = _val;
	}

	void convert(char& val) const
	{
		UInt8 tmp;
		convert(tmp);
		val = static_cast<char>(tmp);
	}

	void convert(std::string& val) const
	{
		val = NumberFormatter::format(_val);
	}

	DynamicAnyHolder* clone() const
	{
		return new DynamicAnyHolderImpl(_val);
	}

	const float& value() const
	{
		return _val;
	}

private:
	float _val;
};


template <>
class DynamicAnyHolderImpl<double>: public DynamicAnyHolder
{
public:
	DynamicAnyHolderImpl(double val): _val(val)
	{
	}

	~DynamicAnyHolderImpl()
	{
	}

	const std::type_info& type() const
	{
		return typeid(double);
	}

	void convert(Int8& val) const
	{
		convertToSmaller(_val, val);
	}

	void convert(Int16& val) const
	{
		convertToSmaller(_val, val);
	}
	
	void convert(Int32& val) const
	{
		convertToSmaller(_val, val);
	}

	void convert(Int64& val) const
	{
		convertToSmaller(_val, val);
	}

	void convert(UInt8& val) const
	{
		convertSignedToUnsigned(_val, val);
	}

	void convert(UInt16& val) const
	{
		convertSignedToUnsigned(_val, val);
	}
	
	void convert(UInt32& val) const
	{
		convertSignedToUnsigned(_val, val);
	}

	void convert(UInt64& val) const
	{
		convertSignedToUnsigned(_val, val);
	}

	void convert(bool& val) const
	{
		val = !(_val <= std::numeric_limits<double>::min() && 
			_val >= -1 * std::numeric_limits<double>::min());
	}

	void convert(float& val) const
	{
		double fMin = -1 * std::numeric_limits<float>::max();
		double fMax = std::numeric_limits<float>::max();

		if (_val < fMin) throw RangeException("Value too small.");
		if (_val > fMax) throw RangeException("Value too large.");

		val = static_cast<float>(_val);
	}

	void convert(double& val) const
	{
		val = _val;
	}

	void convert(char& val) const
	{
		UInt8 tmp;
		convert(tmp);
		val = static_cast<char>(tmp);
	}

	void convert(std::string& val) const
	{
		val = NumberFormatter::format(_val);
	}

	DynamicAnyHolder* clone() const
	{
		return new DynamicAnyHolderImpl(_val);
	}

	const double& value() const
	{
		return _val;
	}

private:
	double _val;
};


template <>
class DynamicAnyHolderImpl<char>: public DynamicAnyHolder
{
public:
	DynamicAnyHolderImpl(char val): _val(val)
	{
	}

	~DynamicAnyHolderImpl()
	{
	}

	const std::type_info& type() const
	{
		return typeid(char);
	}

	void convert(Int8& val) const
	{
		val = static_cast<Int8>(_val);
	}

	void convert(Int16& val) const
	{
		val = static_cast<UInt8>(_val);
	}
	
	void convert(Int32& val) const
	{
		val = static_cast<UInt8>(_val);
	}

	void convert(Int64& val) const
	{
		val = static_cast<UInt8>(_val);
	}

	void convert(UInt8& val) const
	{
		val = static_cast<UInt8>(_val);
	}

	void convert(UInt16& val) const
	{
		val = static_cast<UInt8>(_val);
	}
	
	void convert(UInt32& val) const
	{
		val = static_cast<UInt8>(_val);
	}

	void convert(UInt64& val) const
	{
		val = static_cast<UInt8>(_val);
	}

	void convert(bool& val) const
	{
		val = (_val != '\0');
	}

	void convert(float& val) const
	{
		val = static_cast<float>(_val);
	}

	void convert(double& val) const
	{
		val = static_cast<double>(_val);
	}

	void convert(char& val) const
	{
		val = _val;
	}

	void convert(std::string& val) const
	{
		val = std::string(1, _val);
	}

	DynamicAnyHolder* clone() const
	{
		return new DynamicAnyHolderImpl(_val);
	}

	const char& value() const
	{
		return _val;
	}

private:
	char _val;
};


template <>
class DynamicAnyHolderImpl<std::string>: public DynamicAnyHolder
{
public:
	DynamicAnyHolderImpl(const char* pVal): _val(pVal)
	{
	}

	DynamicAnyHolderImpl(const std::string& val): _val(val)
	{
	}

	~DynamicAnyHolderImpl()
	{
	}

	const std::type_info& type() const
	{
		return typeid(std::string);
	}

	void convert(Int8& val) const
	{
		int v = NumberParser::parse(_val);
		convertToSmaller(v, val);
	}

	void convert(Int16& val) const
	{
		int v = NumberParser::parse(_val);
		convertToSmaller(v, val);
	}
	
	void convert(Int32& val) const
	{
		val = NumberParser::parse(_val);
	}

	void convert(Int64& val) const
	{
		val = NumberParser::parse64(_val);
	}

	void convert(UInt8& val) const
	{
		unsigned int v = NumberParser::parseUnsigned(_val);
		convertToSmallerUnsigned(v, val);
	}

	void convert(UInt16& val) const
	{
		unsigned int v = NumberParser::parseUnsigned(_val);
		convertToSmallerUnsigned(v, val);
	}
	
	void convert(UInt32& val) const
	{
		val = NumberParser::parseUnsigned(_val);
	}

	void convert(UInt64& val) const
	{
		val = NumberParser::parseUnsigned64(_val);
	}

	void convert(bool& val) const
	{
		static const std::string VAL_FALSE("false");
		static const std::string VAL_INTFALSE("0");

		if (_val == VAL_INTFALSE || (icompare(_val, VAL_FALSE) == 0))
			val = false;
		else
			val = true;
	}

	void convert(float& val) const
	{
		double v = NumberParser::parseFloat(_val);
		convertToSmaller(v, val);
	}

	void convert(double& val) const
	{
		val = NumberParser::parseFloat(_val);
	}

	void convert(char& val) const
	{
		if (_val.empty())
			val = '\0';
		else
			val = _val[0];
	}

	void convert(std::string& val) const
	{
		val = _val;
	}

	DynamicAnyHolder* clone() const
	{
		return new DynamicAnyHolderImpl(_val);
	}

	const std::string& value() const
	{
		return _val;
	}

private:
	std::string _val;
};


#ifndef POCO_LONG_IS_64_BIT


template <>
class DynamicAnyHolderImpl<long>: public DynamicAnyHolder
{
public:
	DynamicAnyHolderImpl(long val): _val(val)
	{
	}

	~DynamicAnyHolderImpl()
	{
	}

	const std::type_info& type() const
	{
		return typeid(long);
	}

	void convert(Int8& val) const
	{
		convertToSmaller(_val, val);
	}

	void convert(Int16& val) const
	{
		convertToSmaller(_val, val);
	}
	
	void convert(Int32& val) const
	{
		val = static_cast<Int32>(_val);
	}

	void convert(Int64& val) const
	{
		val = static_cast<Int64>(_val);
	}

	void convert(UInt8& val) const
	{
		convertSignedToUnsigned(_val, val);
	}

	void convert(UInt16& val) const
	{
		convertSignedToUnsigned(_val, val);
	}
	
	void convert(UInt32& val) const
	{
		convertSignedToUnsigned(_val, val);
	}

	void convert(UInt64& val) const
	{
		convertSignedToUnsigned(_val, val);
	}

	void convert(bool& val) const
	{
		val = (_val != 0);
	}

	void convert(float& val) const
	{
		val = static_cast<float>(_val);
	}

	void convert(double& val) const
	{
		val = static_cast<double>(_val);
	}

	void convert(char& val) const
	{
		UInt8 tmp;
		convert(tmp);
		val = static_cast<char>(tmp);
	}

	void convert(std::string& val) const
	{
		val = NumberFormatter::format(_val);
	}

	DynamicAnyHolder* clone() const
	{
		return new DynamicAnyHolderImpl(_val);
	}

	const long& value() const
	{
		return _val;
	}

private:
	long _val;
};


template <>
class DynamicAnyHolderImpl<unsigned long>: public DynamicAnyHolder
{
public:
	DynamicAnyHolderImpl(unsigned long val): _val(val)
	{
	}

	~DynamicAnyHolderImpl()
	{
	}

	const std::type_info& type() const
	{
		return typeid(unsigned long);
	}

	void convert(Int8& val) const
	{
		convertUnsignedToSigned(_val, val);
	}

	void convert(Int16& val) const
	{
		convertUnsignedToSigned(_val, val);
	}
	
	void convert(Int32& val) const
	{
		convertUnsignedToSigned(_val, val);
	}

	void convert(Int64& val) const
	{
		convertUnsignedToSigned(_val, val);
	}

	void convert(UInt8& val) const
	{
		convertToSmallerUnsigned(_val, val);
	}

	void convert(UInt16& val) const
	{
		convertToSmallerUnsigned(_val, val);
	}
	
	void convert(UInt32& val) const
	{
		convertToSmallerUnsigned(_val, val);
	}

	void convert(UInt64& val) const
	{
		val = static_cast<UInt64>(_val);
	}

	void convert(bool& val) const
	{
		val = (_val != 0);
	}

	void convert(float& val) const
	{
		val = static_cast<float>(_val);
	}

	void convert(double& val) const
	{
		val = static_cast<double>(_val);
	}

	void convert(char& val) const
	{
		UInt8 tmp;
		convert(tmp);
		val = static_cast<char>(tmp);
	}

	void convert(std::string& val) const
	{
		val = NumberFormatter::format(_val);
	}

	DynamicAnyHolder* clone() const
	{
		return new DynamicAnyHolderImpl(_val);
	}

	const unsigned long& value() const
	{
		return _val;
	}

private:
	unsigned long _val;
};


#endif // 64bit


} // namespace Poco


#endif // Foundation_DynamicAnyHolder_INCLUDED