/*
 * File:	Value.h
 *
 * Copyright (c) Freescale Semiconductor, Inc. All rights reserved.
 * See included license file for license details.
 */
#if !defined(_Value_h_)
#define _Value_h_

#include "stdafx.h"
#include <string>
#include "int_size.h"
#include "Blob.h"

namespace elftosb
{

/*!
 * \brief Abstract base class for values of arbitrary types.
 */
class Value
{
public:
	Value() {}
	virtual ~Value() {}
	
	virtual std::string getTypeName() const = 0;
	virtual size_t getSize() const = 0;
};

/*!
 * \brief 32-bit signed integer value.
 */
class IntegerValue : public Value
{
public:
	IntegerValue() : m_value(0) {}
	IntegerValue(uint32_t value) : m_value(value) {}
	IntegerValue(const IntegerValue & other) : m_value(other.m_value) {}
	
	virtual std::string getTypeName() const { return "integer"; }
	virtual size_t getSize() const { return sizeof(m_value); }
	
	inline uint32_t getValue() const { return m_value; }
	
	inline operator uint32_t () const { return m_value; }
	
	inline IntegerValue & operator = (uint32_t value) { m_value = value; return *this; }

protected:
	uint32_t m_value;	//!< The integer value.
};

/*!
 * \brief Adds a word size attribute to IntegerValue.
 *
 * The word size really only acts as an attribute that is carried along
 * with the integer value. It doesn't affect the actual value at all.
 * However, you can use the getWordSizeMask() method to mask off bits
 * that should not be there.
 *
 * The word size defaults to a 32-bit word.
 */
class SizedIntegerValue : public IntegerValue
{
public:
	SizedIntegerValue() : IntegerValue(), m_size(kWordSize) {}
	SizedIntegerValue(uint32_t value, int_size_t size=kWordSize) : IntegerValue(value), m_size(size) {}
	SizedIntegerValue(uint16_t value) : IntegerValue(value), m_size(kHalfWordSize) {}
	SizedIntegerValue(uint8_t value) : IntegerValue(value), m_size(kByteSize) {}
	SizedIntegerValue(const SizedIntegerValue & other) : IntegerValue(other), m_size(other.m_size) {}
	
	virtual std::string getTypeName() const { return "sized integer"; }
	virtual size_t getSize() const;
	
	inline int_size_t getWordSize() const { return m_size; }
	inline void setWordSize(int_size_t size) { m_size = size; }
	
	//! \brief Returns a 32-bit mask value dependant on the word size attribute.
	uint32_t getWordSizeMask() const;
	
	//! \name Assignment operators
	//! These operators set the word size as well as the integer value.
	//@{
	SizedIntegerValue & operator = (uint8_t value) { m_value = value; m_size = kByteSize; return *this; }
	SizedIntegerValue & operator = (uint16_t value) { m_value = value; m_size = kHalfWordSize; return *this; }
	SizedIntegerValue & operator = (uint32_t value) { m_value = value; m_size = kWordSize; return *this; }
	//@}
	
protected:
	int_size_t m_size;	//!< Size of the integer.
};

/*!
 * \brief String value.
 *
 * Simply wraps the STL std::string class.
 */
class StringValue : public Value
{
public:
	StringValue() : m_value() {}
	StringValue(const std::string & value) : m_value(value) {}
	StringValue(const std::string * value) : m_value(*value) {}
	StringValue(const StringValue & other) : m_value(other.m_value) {}
	
	virtual std::string getTypeName() const { return "string"; }
	virtual size_t getSize() const { return m_value.size(); }
	
	operator const char * () const { return m_value.c_str(); }
	operator const std::string & () const { return m_value; }
	operator std::string & () { return m_value; }
	operator const std::string * () { return &m_value; }
	operator std::string * () { return &m_value; }
	
	StringValue & operator = (const StringValue & other) { m_value = other.m_value; return *this; }
	StringValue & operator = (const std::string & value) { m_value = value; return *this; }
	StringValue & operator = (const char * value) { m_value = value; return *this; }
	
protected:
	std::string m_value;
};

/*!
 * \brief Binary object value of arbitrary size.
 */
class BinaryValue : public Value, public Blob
{
public:
	BinaryValue() : Value(), Blob() {}
	
	virtual std::string getTypeName() const { return "binary"; }
	virtual size_t getSize() const { return getLength(); }
};

}; // namespace elftosb

#endif // _Value_h_