//====== Copyright © 1996-2004, Valve Corporation, All rights reserved. =======
//
// Purpose: 
//
//=============================================================================

#ifndef UTLSTRING_H
#define UTLSTRING_H
#ifdef _WIN32
#pragma once
#endif


#include "tier1/utlmemory.h"


//-----------------------------------------------------------------------------
// Base class, containing simple memory management
//-----------------------------------------------------------------------------
class CUtlBinaryBlock
{
public:
	CUtlBinaryBlock( int growSize = 0, int initSize = 0 );

	// NOTE: nInitialLength indicates how much of the buffer starts full
	CUtlBinaryBlock( void* pMemory, int nSizeInBytes, int nInitialLength );
	CUtlBinaryBlock( const void* pMemory, int nSizeInBytes );
	CUtlBinaryBlock( const CUtlBinaryBlock& src );

	void		Get( void *pValue, int nMaxLen ) const;
	void		Set( const void *pValue, int nLen );
	const void	*Get( ) const;
	void		*Get( );

	unsigned char& operator[]( int i );
	const unsigned char& operator[]( int i ) const;

	int			Length() const;
	void		SetLength( int nLength );	// Undefined memory will result
	bool		IsEmpty() const;

	bool		IsReadOnly() const;

	CUtlBinaryBlock &operator=( const CUtlBinaryBlock &src );

	// Test for equality
	bool operator==( const CUtlBinaryBlock &src ) const;

private:
	CUtlMemory<unsigned char> m_Memory;
	int m_nActualLength;
};


//-----------------------------------------------------------------------------
// class inlines
//-----------------------------------------------------------------------------
inline const void *CUtlBinaryBlock::Get( ) const
{
	return m_Memory.Base();
}

inline void *CUtlBinaryBlock::Get( )
{
	return m_Memory.Base();
}

inline int CUtlBinaryBlock::Length() const
{
	return m_nActualLength;
}

inline unsigned char& CUtlBinaryBlock::operator[]( int i )
{
	return m_Memory[i];
}

inline const unsigned char& CUtlBinaryBlock::operator[]( int i ) const
{
	return m_Memory[i];
}

inline bool CUtlBinaryBlock::IsReadOnly() const
{
	return m_Memory.IsReadOnly();
}

inline bool CUtlBinaryBlock::IsEmpty() const
{
	return Length() == 0;
}


//-----------------------------------------------------------------------------
// Simple string class. 
// NOTE: This is *not* optimal! Use in tools, but not runtime code
//-----------------------------------------------------------------------------
class CUtlString
{
public:
	CUtlString();
	CUtlString( const char *pString );
	CUtlString( const CUtlString& string );

	// Attaches the string to external memory. Useful for avoiding a copy
	CUtlString( void* pMemory, int nSizeInBytes, int nInitialLength );
	CUtlString( const void* pMemory, int nSizeInBytes );

	const char	*Get( ) const;
	void		Set( const char *pValue );

	// Converts to c-strings
	operator const char*() const;

	// for compatibility switching items from UtlSymbol
	const char  *String() const { return Get(); }

	// Returns strlen
	int			Length() const;
	bool		IsEmpty() const;

	// Sets the length (used to serialize into the buffer )
	void		SetLength( int nLen );
	char		*Get();

	// Strips the trailing slash
	void		StripTrailingSlash();

	CUtlString &operator=( const CUtlString &src );
	CUtlString &operator=( const char *src );

	// Test for equality
	bool operator==( const CUtlString &src ) const;
	bool operator==( const char *src ) const;
	bool operator!=( const CUtlString &src ) const { return !operator==( src ); }
	bool operator!=( const char *src ) const { return !operator==( src ); }

	CUtlString &operator+=( const CUtlString &rhs );
	CUtlString &operator+=( const char *rhs );
	CUtlString &operator+=( char c );
	CUtlString &operator+=( int rhs );
	CUtlString &operator+=( double rhs );

	int Format( const char *pFormat, ... );

private:
	CUtlBinaryBlock m_Storage;
};


//-----------------------------------------------------------------------------
// Inline methods
//-----------------------------------------------------------------------------
inline bool CUtlString::IsEmpty() const
{
	return Length() == 0;
}


#endif // UTLSTRING_H