/*

www.sourceforge.net/projects/tinyxml

Original file by Yves Berquin.

This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any

damages arising from the use of this software.

Permission is granted to anyone to use this software for any

purpose, including commercial applications, and to alter it and

redistribute it freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must

not claim that you wrote the original software. If you use this

software in a product, an acknowledgment in the product documentation

would be appreciated but is not required.

2. Altered source versions must be plainly marked as such, and

must not be misrepresented as being the original software.

3. This notice may not be removed or altered from any source

distribution.

*/

/*

 * THIS FILE WAS ALTERED BY Tyge Lovset, 7. April 2005.

 *

 * - completely rewritten. compact, clean, and fast implementation.

 * - sizeof(TiXmlString) = pointer size (4 bytes on 32-bit systems)

 * - fixed reserve() to work as per specification.

 * - fixed buggy compares operator==(), operator<(), and operator>()

 * - fixed operator+=() to take a const ref argument, following spec.

 * - added "copy" constructor with length, and most compare operators.

 * - added swap(), clear(), size(), capacity(), operator+().

 */

#ifndef TIXML_USE_STL

#ifndef TIXML_STRING_INCLUDED

#define TIXML_STRING_INCLUDED

#include <assert.h>

#include <string.h>

/*

   TiXmlString is an emulation of a subset of the std::string template.

   Its purpose is to allow compiling TinyXML on compilers with no or poor STL support.

   Only the member functions relevant to the TinyXML project have been implemented.

   The buffer allocation is made by a simplistic power of 2 like mechanism : if we increase

   a string and there's no more room, we allocate a buffer twice as big as we need.

*/

class TiXmlString

{

  public :

	// The size type used

  	typedef unsigned int size_type;

	// Error value for find primitive

	static const size_type npos; // = -1;

	// TiXmlString empty constructor

	TiXmlString () : rep_(&nullrep_)

	{

	}

	// TiXmlString copy constructor

	TiXmlString (const TiXmlString & copy)

	{

		init(copy.length());

		memcpy(start(), copy.data(), length());

	}

	// TiXmlString constructor, based on a string

	TiXmlString (const char * copy)

	{

		init( static_cast<size_type>( strlen(copy) ));

		memcpy(start(), copy, length());

	}

	// TiXmlString constructor, based on a string

	TiXmlString (const char * str, size_type len)

	{

		init(len);

		memcpy(start(), str, len);

	}

	// TiXmlString destructor

	~TiXmlString ()

	{

		quit();

	}

	// = operator

	TiXmlString& operator = (const char * copy)

	{

		return assign( copy, (size_type)strlen(copy));

	}

	// = operator

	TiXmlString& operator = (const TiXmlString & copy)

	{

		return assign(copy.start(), copy.length());

	}

	// += operator. Maps to append

	TiXmlString& operator += (const char * suffix)

	{

		return append(suffix, static_cast<size_type>( strlen(suffix) ));

	}

	// += operator. Maps to append

	TiXmlString& operator += (char single)

	{

		return append(&single, 1);

	}

	// += operator. Maps to append

	TiXmlString& operator += (const TiXmlString & suffix)

	{

		return append(suffix.data(), suffix.length());

	}

	// Convert a TiXmlString into a null-terminated char *

	const char * c_str () const { return rep_->str; }

	// Convert a TiXmlString into a char * (need not be null terminated).

	const char * data () const { return rep_->str; }

	// Return the length of a TiXmlString

	size_type length () const { return rep_->size; }

	// Alias for length()

	size_type size () const { return rep_->size; }

	// Checks if a TiXmlString is empty

	bool empty () const { return rep_->size == 0; }

	// Return capacity of string

	size_type capacity () const { return rep_->capacity; }

	// single char extraction

	const char& at (size_type index) const

	{

		assert( index < length() );

		return rep_->str[ index ];

	}

	// [] operator

	char& operator [] (size_type index) const

	{

		assert( index < length() );

		return rep_->str[ index ];

	}

	// find a char in a string. Return TiXmlString::npos if not found

	size_type find (char lookup) const

	{

		return find(lookup, 0);

	}

	// find a char in a string from an offset. Return TiXmlString::npos if not found

	size_type find (char tofind, size_type offset) const

	{

		if (offset >= length()) return npos;

		for (const char* p = c_str() + offset; *p != '\0'; ++p)

		{

		   if (*p == tofind) return static_cast< size_type >( p - c_str() );

		}

		return npos;

	}

	void clear ()

	{

		//Lee:

		//The original was just too strange, though correct:

		//	TiXmlString().swap(*this);

		//Instead use the quit & re-init:

		quit();

		init(0,0);

	}

	/*	Function to reserve a big amount of data when we know we'll need it. Be aware that this

		function DOES NOT clear the content of the TiXmlString if any exists.

	*/

	void reserve (size_type cap);

	TiXmlString& assign (const char* str, size_type len);

	TiXmlString& append (const char* str, size_type len);

	void swap (TiXmlString& other)

	{

		Rep* r = rep_;

		rep_ = other.rep_;

		other.rep_ = r;

	}

  private:

	void init(size_type sz) { init(sz, sz); }

	void set_size(size_type sz) { rep_->str[ rep_->size = sz ] = '\0'; }

	char* start() const { return rep_->str; }

	char* finish() const { return rep_->str + rep_->size; }

	struct Rep

	{

		size_type size, capacity;

		char str[1];

	};

	void init(size_type sz, size_type cap)

	{

		if (cap)

		{

			rep_ = static_cast<Rep*>(operator new(sizeof(Rep) + cap));

			rep_->str[ rep_->size = sz ] = '\0';

			rep_->capacity = cap;

		}

		else

		{

			rep_ = &nullrep_;

		}

	}

	void quit()

	{

		if (rep_ != &nullrep_)

		{

			operator delete(rep_);

		}

	}

	Rep * rep_;

	static Rep nullrep_;

} ;

inline bool operator == (const TiXmlString & a, const TiXmlString & b)

{

	return    ( a.length() == b.length() )				// optimization on some platforms

	       && ( strcmp(a.c_str(), b.c_str()) == 0 );	// actual compare

}

inline bool operator < (const TiXmlString & a, const TiXmlString & b)

{

	return strcmp(a.c_str(), b.c_str()) < 0;

}

inline bool operator != (const TiXmlString & a, const TiXmlString & b) { return !(a == b); }

inline bool operator >  (const TiXmlString & a, const TiXmlString & b) { return b < a; }

inline bool operator <= (const TiXmlString & a, const TiXmlString & b) { return !(b < a); }

inline bool operator >= (const TiXmlString & a, const TiXmlString & b) { return !(a < b); }

inline bool operator == (const TiXmlString & a, const char* b) { return strcmp(a.c_str(), b) == 0; }

inline bool operator == (const char* a, const TiXmlString & b) { return b == a; }

inline bool operator != (const TiXmlString & a, const char* b) { return !(a == b); }

inline bool operator != (const char* a, const TiXmlString & b) { return !(b == a); }

TiXmlString operator + (const TiXmlString & a, const TiXmlString & b);

TiXmlString operator + (const TiXmlString & a, const char* b);

TiXmlString operator + (const char* a, const TiXmlString & b);

/*

   TiXmlOutStream is an emulation of std::ostream. It is based on TiXmlString.

   Only the operators that we need for TinyXML have been developped.

*/

class TiXmlOutStream : public TiXmlString

{

public :

	// TiXmlOutStream << operator.

	TiXmlOutStream & operator << (const TiXmlString & in)

	{

		*this += in;

		return *this;

	}

	// TiXmlOutStream << operator.

	TiXmlOutStream & operator << (const char * in)

	{

		*this += in;

		return *this;

	}

} ;

#endif	// TIXML_STRING_INCLUDED

#endif	// TIXML_USE_STL