#pragma once


#include <stdlib.h>
#include <string>
#include <functional>
#include <list>
#include <vector>


#include "String.StringView.hpp"


#ifdef DSTRING_EXPORTS
#define DSTRING_API _declspec(dllexport)
#else
#define DSTRING_API _declspec(dllimport)
#endif


#ifdef _DSTRING_STATIC_
#undef DSTRING_API
#define DSTRING_API
#endif



#ifndef DSTRING_EXPORTS

#ifdef _WIN64

#ifdef _DEBUG
#pragma comment (lib, "ECOM.Utility.DString64D.lib") 
#else
#pragma comment (lib, "ECOM.Utility.DString64.lib") 
#endif

#else	//	X86

#endif

#endif  //  DSTRING_EXPORTS



namespace ECOM::Utility::String
{
	class WString;

//	using size_type = unsigned int;  // 用 unsigned int 比较好, 但是会造成很多编译警告
	using size_type = int;

	//-----------------------------------------------------------------------------
	//		DStringData
	//-----------------------------------------------------------------------------
	namespace
	{
		struct DStringData
		{
			long	  nRefs;			// reference count
			size_type nDataLength;		// length of data (including terminator)
			size_type nAllocLength;		// length of allocation
			// char data[nAllocLength]

			char * data ()				// char* to managed data
			{
				return (char *) (this + 1);
			}
		};
	}


	//-----------------------------------------------------------------------------
	//		DString
	//-----------------------------------------------------------------------------

	class DSTRING_API DString
	{
	public:
		using value_type = DString;
		using reference = value_type &;
		using const_reference = const value_type &;

	public:
	// Constructors

		DString ();
//		DString (const char * lpsz);
		DString (const char * lpsz, int nLength);

//		DString (const unsigned char * lpsz) { Init(); *this = (const char *) lpsz; }

		// std::string 支持 std::string (char * p), 即支持隐式从 char * 构造, 
		// 因此这里变成显示的构造, 以避免 DString (const char *) 的默认构造
		explicit DString (const std::string & Src);

		DString (const DString & Src);
		DString (DString && Src);

	public:
		~DString ();

	public:
		// get data length
		size_type  GetLength ()		 const;
		size_type  GetByteLength ()  const { return GetLength (); }
		size_type  GetAllocLength () const { return GetData ()->nAllocLength; }
		size_type  size ()		     const { return GetLength (); };

	public:
		bool empty () const { return IsEmpty (); }
		bool IsEmpty () const { return GetLength () <= 0; }
		void Clear ();
		void Release ();

	public:
		char GetAt (int nIndex) const
		{
	//		ASSERT(nIndex >= 0);
	//		ASSERT(nIndex < GetData()->nDataLength);
			return m_pchData [nIndex];
		}

		char operator [] (int nIndex) const { return GetAt (nIndex); }
		void SetAt (int nIndex, char ch);

		int Count (char ch) const;
		int Count (const StringView & Sub) const;

	public:
		DString & operator = (const char *) = delete;
		DString & operator = (const DString & S);
		DString & operator = (DString && S);
		DString & operator = (char ch);
		DString & operator = (const std::string & S)  { AssignCopy (static_cast <int> (S.size ()), S.c_str ()); return (*this); }
		DString & operator = (const StringView & S) { return Assign (S); }

		DString & operator = (std::initializer_list <StringView> lst)  { return Assign (lst); }
		DString & operator = (std::initializer_list <const char *> lst) { return Assign (lst); }

	public:
		//< 这些函数被声明为废除, 避免误写误用. 如果不废除, 编译器将认为/转化为 Append (char)
		// 当然可以设计成自动转换 { return Append (From (v)); }
		// 但是万一用户真是写错了, 自动转换就变成帮倒忙了
		// 2022-12-26
		DString & Append (const char * v) = delete;   // 改用 "..."_sv 代替
		DString & Append (int v) = delete;
		DString & Append (unsigned int v) = delete;
		DString & Append (short v) = delete;
		DString & Append (unsigned short v) = delete;
		DString & Append (long v) = delete;
		DString & Append (unsigned long v) = delete;
		DString & Append (float v) = delete;
		DString & Append (double v) = delete;
		//>

		DString & Append (unsigned char ch)
		{
			return Append (static_cast <char> (ch));
		}

		DString & Append (char ch)
		{
			ConcatInPlace (1, &ch);
			return *this;
		}

		DString & Append (const DString & S)
		{
			ConcatInPlace (S.GetData ()->nDataLength, S.m_pchData);
			return *this;
		}

		DString & Append (const StringView & S);
		DString & Append (const std::string_view & S);

		DString & Append (const std::string & S)
		{
			ConcatInPlace (static_cast <int> (S.length ()), S.c_str());
			return *this;
		}

//		DString & operator += (const char * lpsz)		= delete; // 改用 "..."_sv 代替
		DString & operator += (const DString & S)	    { return Append (S); }
		DString & operator += (char ch)					{ return Append (ch); }
		DString & operator += (const StringView & S)	{ return Append (S); }
//		DString & operator += (const std::string & S)   { return Append (S); }
		DString & operator += (std::initializer_list <StringView> lst) { return Append (lst); }

//<		DString & operator << (const char * lpsz)		= delete; // 改用 "..."_sv 代替
//		不废除了, 某些强制赋值还是需要的.
//		如果不做提前声明, 编译时发生 C2678: 无法找到匹配的运算符
//		2023-11-14
//>
		DString & operator << (const DString & S)	    { return Append (S); }
		DString & operator << (char ch)					{ return Append (ch); }
		DString & operator << (const StringView & S)    { return Append (S); }
		DString & operator << (short v)					{ return Append (From (v)); }
		DString & operator << (int v)					{ return Append (From (v)); }
		DString & operator << (long v)					{ return Append (From (v)); }
		DString & operator << (UINT16 v)				{ return Append (From (v)); }
		DString & operator << (UINT32 v)				{ return Append (From (v)); }
		DString & operator << (unsigned long v)			{ return Append (From (v)); }
//		DString & operator << (const std::string & S)   { return Append (S); }

		DString & operator << (std::initializer_list <StringView> lst) { return Append (lst); }

	public:
		int  Compare (const char * With) const;
		int  CompareNoCase (const char * With) const;

		int  Compare (const DStringView & With) const;
		int  Compare (const DString & With) const;

//<		增加命名空间后, std::map <DString, ...> 就需要如下内置比较函数
		bool operator == (const DString & with) const { return Compare (with) == 0; }
		bool operator != (const DString & with) const { return Compare (with) != 0; }
		bool operator <  (const DString & with) const { return Compare (with) < 0; }
		bool operator >  (const DString & with) const { return Compare (with) > 0; }
		bool operator <= (const DString & with) const { return Compare (with) <= 0; }
		bool operator >= (const DString & with) const { return Compare (with) >= 0; }
//>

	public:
		DString Mid (int nFirst, int nCount) const;
		DString Mid (int nFirst) const;
		DString Left (int nCount) const;
		DString Right (int nCount) const;

		//  characters from beginning that are also in passed string
		DString SpanIncluding (const char * lpszCharSet) const;
		// characters from beginning that are not also in passed string
		DString SpanExcluding (const char * lpszCharSet) const;

	public:
		void MakeUpper ();
		void MakeLower ();
		void MakeReverse ();

	public:
		int  TrimLeft ();   // 返回去除的字符数
		int  TrimRight ();  // 返回去除的字符数

		void TrimLeft (char chTarget);
		void TrimLeft (const StringView & szTargets);
		void TrimRight (char chTarget);
		void TrimRight (const StringView & szTargets);

		DString	Trim () const { DString copy = *this; copy.TrimRight (); copy.TrimLeft (); return copy; }

	public:
	//	用指定的字符填充左边/右边/中间, 直到总长度达到指定值为止
		void JustLeft   (int ToLength, char ch = ' ');
		void JustRight  (int ToLength, char ch = ' ');
		void JustCenter (int ToLength, char ch = ' ');

	public:
		int  Replace (char chOld, char chNew);
		int  Replace (const DString & Old, const StringView & New);
		int  Replace (const StringView & Old, const StringView & New);
		int  NCReplace (const StringView & Old, const StringView & New);
		int  ReplaceTabs (int abstand);

		int  Remove (const StringView & Sub);
		int  Remove (char chRemove);
		int  RemoveSpace ();
		int  RemovePunctuation ();
		int  RemoveControl ();
		// 用谓词函数来判断单个字符是否应该删除, 如果返回 true 就删除
		int  Remove (std::function <bool (int)> pred);

		int  NCRemove (const StringView & Sub);
		int  NCRemove (char chRemove);

	public:
		int  Insert (int nIndex, char ch);
		int  Insert (int nIndex, const StringView & Sub);
		int  Delete (int nIndex, int nCount = 1);

		void Repeat (char ch, int n);
		void Repeat (const StringView & S, int n);

	public:
		// Pred 返回 true, 表明找到, 否则下一个字符
		using tPred = std::function <bool (char ch)>;

	public:
		int  Find (char ch, int nStart = 0) const;
		int  Find (tPred && pred, int nStart = 0) const;
		int  Find (const StringView & Sub, int nStart = 0) const;
		int  Find (const DString & Sub, int nStart = 0) const;

		int  ReverseFind (char ch, int nStart = 0) const;
		int  ReverseFind (const StringView & Sub, int nStart = 0) const;

		bool StartWith (const StringView & Sub, int iStart = 0) const;
		bool EndWith   (const StringView & Sub, int iStart = 0) const;

		bool StartWith (const DString & Sub, int iStart = 0) const { return StartWith (Sub.To <StringView> (), iStart); }
		bool EndWith   (const DString & Sub, int iStart = 0) const { return EndWith   (Sub.To <StringView> (), iStart); }

		bool StartWith (char ch, int iStart = 0) const;
		bool EndWith   (char ch, int iStart = 0) const;

		int  NCFind (char ch) const;
		int  NCFind (const StringView & Sub) const;

	public:
		// start 是起始位置
		using tvCallback = std::function <void (CV_String & sub)>;
		// 如果回调返回 true, 则继续, 否则停止. Index=第几次回调
		using tbCallback = std::function <bool (int Index, CV_String & sub)>;

		int  Split (char     ch  , tvCallback && onFound, int start = 0) const;
		int  Split (tPred && pred, tvCallback && onFound, int start = 0) const;

		int  SplitIf (char     ch  , tbCallback && onFound, int start = 0) const;
		int  SplitIf (tPred && pred, tbCallback && onFound, int start = 0) const;

		// 分割成列表
		auto SplitTo (char     ch  , int start = 0) const -> std::list <DString>;
		auto SplitTo (tPred && pred, int start = 0) const -> std::list <DString>;

		// 分割成数组, 最多 Max 个
		auto SplitMax (int Max, char     ch  , int start = 0) const -> std::vector <DString>;
		auto SplitMax (int Max, tPred && pred, int start = 0) const -> std::vector <DString>;

		// 返回指定 Index 的某一个, 如果找不到: 当 Index=0 时返回本串, 否则返回空串
		auto SplitOne (int atIndex, char     ch  , int start = 0) const -> DString;
		auto SplitOne (int atIndex, tPred && pred, int start = 0) const -> DString;

	//	Cast
	public:
		// return pointer to const string
		operator const char * ()    const { return m_pchData; }
		const char * constBuffer () const { return m_pchData; }
		char * data ()              const { return m_pchData; }
		const char * c_str ()       const { return m_pchData; }

		operator bool () const = delete;

	//	用于自动判别类型
	public:
		template <typename T> bool Is () const  { return false; }
		template <> bool Is <DString> () const  { return true; }
		template <> bool Is <WString> () const  { return false; }

	public:
		static DString From (const int i);
		static DString From (const long i);
		static DString From (const unsigned int u);
		static DString From (const unsigned long u);
		static DString From (const __int64 i);
		static DString From (const unsigned __int64 u);
		static DString From (const double d);
		static DString From (const std::string_view & Src);
		static DString From (CV_String & Src)  { return DString (Src); }
		static DString From (const DString & Src) { return DString (Src); }

		// repeat a single character
		[[nodiscard]]
		static DString FromRepeat (char ch, int nRepeat);

	public:		//	为了支持部分组件能与 8.0 一致, 加入如下功能
		template <typename... Args>
		[[nodiscard]]
		static inline DString FromFormat (const StringView & szFormat, Args && ... args);

		template <typename... Args>
		inline void Format (const StringView & szFormat, Args && ... args);

		// append with the formatted string 
		template <typename... Args>
		void AppendFormat (const StringView & szFormat, Args && ... args);

		[[nodiscard]]
		static DString FromErrorCode (DWORD errorCode);	//	通过调用 FormtMessage, 把 Win32 错误码转换成字符串

	public:
		// Access to string implementation buffer as "C" character array
		// get pointer to modifiable buffer at least as long as nMinBufLength
		char * GetBuffer (int nMinBufLength);
		// release buffer, setting length to nNewLength (or to first nul if -1)
		void ReleaseBuffer (int nNewLength = -1);
		// get pointer to modifiable buffer exactly as long as nNewLength
		char * GetBufferSetLength (int nNewLength);

		void Reserve (int nMinBufLength)  { GetBuffer (nMinBufLength); }
		void reserve (int nMinBufLength)  { GetBuffer (nMinBufLength); }
		
	public:
	//	转换函数
		double  Double ()	const	{ return atof (m_pchData); }
		int     Int  ()		const	{ int  i = atoi (m_pchData); if (i) return i;  return strtol (m_pchData, nullptr, 16); }
		long    Long ()		const	{ long l = atol (m_pchData); if (l) return l;  return strtol (m_pchData, nullptr, 16); }
		char    Char ()		const	{ return m_pchData[0]; }
		bool    Bool ()		const;

		__int64	Int64 ()	const	{ __int64 i = _atoi64 (m_pchData); if (i) return i;  return _strtoi64 (m_pchData, nullptr, 16); }

		template <typename T> T To () const = delete;
		template <> int     To () const { return Int (); }
		template <> double  To () const { return Double (); }
		template <> float	To () const { return (float) Double (); }
		template <> long    To () const { return Long (); }
		template <> bool    To () const { return Bool (); }
		template <> __int64 To () const { return Int64 (); }
		template <> unsigned int     To () const { return Int (); }
		template <> unsigned __int64 To () const { return Int64 (); }
		template <> unsigned long    To () const { return Long (); }
		template <> DString To () const { return *this; }
		template <> std::string To () const { return std::string { m_pchData, static_cast <std::string::size_type> (GetLength ())}; }
		template <> std::string_view To () const { return std::string_view { m_pchData, static_cast <std::string_view::size_type> (GetLength ()) }; }

	public:  // 与 StringView 的转换,构造,赋值等
		DString (const StringView & Src);
		//DString (const std::string_view & Src);  // 不能定义这个构造函数, 否则, 编译 eSTR::DString Path (szPath) 时, 编译器会发生警告: 重载函数的调用不明确

	public:
		operator StringView () const noexcept;
		operator std::string_view () const noexcept;
		// ? 不能定义这个强制转换函数, 否则, 编译 Hash (DString) 时, 编译器会发生警告: 重载函数的调用不明确

	public:
		template <> StringView To () const;
		template <> const StringView To () const;

		DString & Assign (const StringView & _Right);
		DString & Assign (const std::string_view & _Right);

		DString & Append (std::initializer_list <StringView> lst);
		DString & Append (std::initializer_list <std::string_view> lst);
		DString & Append (std::initializer_list <const char *> lst);

		DString & Assign (std::initializer_list <StringView> lst);
		DString & Assign (std::initializer_list <std::string_view> lst);
		DString & Assign (std::initializer_list <const char *> lst);

		// 万一编译器警告: 调用不明确, 就用模板函数显式告诉编译器
		template <typename T> static DString From (std::initializer_list <T> lst)  { DString rc; rc.Assign (lst); return rc; }
		static DString From (std::initializer_list <StringView> lst)               { DString rc; rc.Assign (lst); return rc; }
		static DString From (std::initializer_list <std::string_view> lst)         { DString rc; rc.Assign (lst); return rc; }
		static DString From (std::initializer_list <const char *> lst)             { DString rc; rc.Assign (lst); return rc; }

	public:
	//	判断整个字符串是否是某一类字符组成
		bool IsDigit ()	const;
		bool IsAlNum ()	const;
		bool IsAlpha ()	const;
		bool IsUpper ()	const;
		bool IsLower ()	const;
		bool IsSpace ()	const;

	//	判断某个字符是否是某一类字符组成
		bool IsDigit (int nPos)	const;
		bool IsAlNum (int nPos)	const;
		bool IsAlpha (int nPos)	const;
		bool IsUpper (int nPos)	const;
		bool IsLower (int nPos)	const;
		bool IsSpace (int nPos)	const;

	public:
		bool ToCharacterSet	 (unsigned int CodePage);
		bool FromCharacterSet (unsigned int CodePage);

	public:
		// release memory allocated to but unused by string
		void FreeExtra ();

	protected:
		char * m_pchData;   // pointer to ref counted string data

		// implementation helpers
		DStringData * GetData () const
		{
 			return ((DStringData *) m_pchData)-1; 
		}

		bool IsNil () const;  // 用来判断 m_pchData 是否等于 DStringPchNil

		void Init ();

		void AllocCopy (DString & dest, int nCopyLen, int nCopyIndex, int nExtraLen) const;
		void AllocBuffer (int nLen);
		void AssignCopy (int Len, const char * S);
		void ConcatCopy (int L1, const char * S1, int L2, const char * S2);
		void ConcatInPlace (int Len, const char * S);
		void CopyBeforeWrite ();
		void AllocBeforeWrite (int nLen);

		DString & Assign (const DString & Src);  // 拷贝赋值

		void MoveAssign (DString & Src);
		void MoveAssign (DString && Src);

	protected:
		static void Release (DStringData * pData);
		static void FreeData (DStringData * pData);


	//-----------------------------------------------------------------------------
	// Token类用来对字符串进行标识符切分
	//-----------------------------------------------------------------------------
	public:
		class DSTRING_API Token
		{
		public:
			Token (const DString & str, bool bSkipPunctuation = false) : 
				m_Str (str),
				m_bSkipPunctuation (bSkipPunctuation)

			{
				// 在Restart之前先初始化这个变量,因为Restart之后需要立即调用Next,
				// 而Next函数需要这个变量
				Restart ();
			}

		public:
			operator bool () const { return m_bContinue; };
			operator DString () const { return Current (); };

		public:
			// 定位到下一个标识符
			bool Next (void);
			// 定位到下一个标识符,但是以出作为分割符
			bool Next (char sep);
			// 定位到行尾,Current返回直到行尾的所有字符,但是不包括行尾的回车或换行
			bool NextLine (void);					
			DString Current (void) const;			// 获得当前标识符,或者当前行
			bool IsValid () const { return (m_nL <= m_nR); };
			void Clear (void)
			{ 
				m_nL = 0; 
				m_nR = -1; 
				m_nNext = 0; 
				m_bContinue = true; 
				m_nStrLength = 0; 
			}

			void Restart (void)						// 重新开始
			{
				m_szDoc = m_Str; 
				Clear ();
				m_nStrLength = (int) strlen (m_szDoc);
				Next ();
			}

			bool SkipPunctuation (bool bSkipPunctuation)
			{
				bool tmp = m_bSkipPunctuation;
				m_bSkipPunctuation =bSkipPunctuation;
				return tmp;
			}

			void operator ++ ()		// ++Token; prevfix 
			{
				Next ();
			}

			void operator ++ (int)	// Token++; postfix
			{
				Next ();
			}

			DString operator () (void) const
			{
				return Current ();
			}

		protected:
			int  FindWhitespace (int nChar) const;		// 从nChar开始,定位到下一个非空字符,并返回这个位置的索引,如果找不到,返回-1
			int  FindChar (int nChar, char ch) const;	// 从nChar开始,在字符串中寻找与ch相同的下一个ch,并返回这个位置的索引,如果找不到,返回-1

		protected:
			const DString & m_Str;

			const char * m_szDoc;

			int		m_nL;							// 当前标识符的左边界
			int		m_nR;							// 当前标识符的右边界
			int		m_nNext;						// 下一个标识符的初始位置

			bool	m_bContinue;					// 可用继续迭代吗?
			int		m_nStrLength;					// 字符串长度;

			bool	m_bSkipPunctuation;				// Next()时跳过标点符号,即Current()不会返回遇到的标点符号
		};

	};


}


namespace eSTR = ECOM::Utility::String;

DSTRING_API eSTR::DString operator + (const eSTR::DString & S1, const eSTR::DString & S2);
DSTRING_API eSTR::DString operator + (const eSTR::DString & S, char ch);
DSTRING_API eSTR::DString operator + (const eSTR::DString & S1, const eSTR::StringView & S2);

DSTRING_API eSTR::DString operator + (const eSTR::StringView & S1, const eSTR::DString & S2);
DSTRING_API eSTR::DString operator + (const eSTR::StringView & S1, char ch);

DSTRING_API eSTR::DString operator + (char  ch, const eSTR::DString & S);

DSTRING_API eSTR::DString operator + (const eSTR::DString & S1, const std::string_view & S2);
DSTRING_API eSTR::DString operator + (const std::string_view & S1, const eSTR::DString & S2);
DSTRING_API eSTR::DString operator + (const std::string_view & S1, char ch);
DSTRING_API eSTR::DString operator + (const eSTR::DString & S1, const std::string & S2);
DSTRING_API eSTR::DString operator + (const std::string & S1, const eSTR::DString & S2);

DSTRING_API eSTR::DString operator + (const eSTR::StringView & S1, const eSTR::StringView & S2);



// Compare helpers
#if 0  // 如下比较重载将导致编译器无法选择, 因此注释掉
DSTRING_API inline bool operator == (const eSTR::DString & s1, const eSTR::DString & s2)  { return s1.Compare (s2) == 0; }
DSTRING_API inline bool operator != (const eSTR::DString & s1, const eSTR::DString & s2)  { return s1.Compare (s2) != 0; }
DSTRING_API inline bool operator <  (const eSTR::DString & s1, const eSTR::DString & s2)  { return s1.Compare (s2) <  0; }
DSTRING_API inline bool operator >  (const eSTR::DString & s1, const eSTR::DString & s2)  { return s1.Compare (s2) > 0; }
DSTRING_API inline bool operator <= (const eSTR::DString & s1, const eSTR::DString & s2)  { return s1.Compare (s2) <= 0; }
DSTRING_API inline bool operator >= (const eSTR::DString & s1, const eSTR::DString & s2)  { return s1.Compare (s2) >= 0; }
#endif

DSTRING_API inline bool operator == (const eSTR::DString & s1, const eSTR::StringView s2)  { return s1.Compare (s2) == 0; }
DSTRING_API inline bool operator != (const eSTR::DString & s1, const eSTR::StringView s2)  { return s1.Compare (s2) != 0; }
DSTRING_API inline bool operator <  (const eSTR::DString & s1, const eSTR::StringView s2)  { return s1.Compare (s2) <  0; }
DSTRING_API inline bool operator >  (const eSTR::DString & s1, const eSTR::StringView s2)  { return s1.Compare (s2) >  0; }
DSTRING_API inline bool operator <= (const eSTR::DString & s1, const eSTR::StringView s2)  { return s1.Compare (s2) <= 0; }
DSTRING_API inline bool operator >= (const eSTR::DString & s1, const eSTR::StringView s2)  { return s1.Compare (s2) >= 0; }

#if 1
inline bool operator == (const eSTR::DString & s1, const char * s2) = delete;
inline bool operator != (const eSTR::DString & s1, const char * s2) = delete;
inline bool operator <  (const eSTR::DString & s1, const char * s2) = delete;
inline bool operator >  (const eSTR::DString & s1, const char * s2) = delete;
inline bool operator <= (const eSTR::DString & s1, const char * s2) = delete;
inline bool operator >= (const eSTR::DString & s1, const char * s2) = delete;
#else
DSTRING_API inline bool operator == (const eSTR::DString & s1, const char * s2) { return s1.Compare (s2) == 0; }
DSTRING_API inline bool operator != (const eSTR::DString & s1, const char * s2) { return s1.Compare (s2) != 0; }
DSTRING_API inline bool operator <  (const eSTR::DString & s1, const char * s2) { return s1.Compare (s2) < 0; }
DSTRING_API inline bool operator >  (const eSTR::DString & s1, const char * s2) { return s1.Compare (s2) > 0; }
DSTRING_API inline bool operator <= (const eSTR::DString & s1, const char * s2) { return s1.Compare (s2) <= 0; }
DSTRING_API inline bool operator >= (const eSTR::DString & s1, const char * s2) { return s1.Compare (s2) >= 0; }
#endif

DSTRING_API inline bool operator == (const eSTR::StringView & s1, const eSTR::DString & s2) { return s2.Compare (s1) == 0; }
DSTRING_API inline bool operator != (const eSTR::StringView & s1, const eSTR::DString & s2) { return s2.Compare (s1) != 0; }
DSTRING_API inline bool operator <  (const eSTR::StringView & s1, const eSTR::DString & s2) { return s2.Compare (s1) > 0; }
DSTRING_API inline bool operator >  (const eSTR::StringView & s1, const eSTR::DString & s2) { return s2.Compare (s1) < 0; }
DSTRING_API inline bool operator <= (const eSTR::StringView & s1, const eSTR::DString & s2) { return s2.Compare (s1) >= 0; }
DSTRING_API inline bool operator >= (const eSTR::StringView & s1, const eSTR::DString & s2) { return s2.Compare (s1) <= 0; }


#if 1
inline bool operator == (const char * s1, const eSTR::DString & s2) = delete;
inline bool operator != (const char * s1, const eSTR::DString & s2) = delete;
inline bool operator <  (const char * s1, const eSTR::DString & s2) = delete;
inline bool operator >  (const char * s1, const eSTR::DString & s2) = delete;
inline bool operator <= (const char * s1, const eSTR::DString & s2) = delete;
inline bool operator >= (const char * s1, const eSTR::DString & s2) = delete;
#else
DSTRING_API inline bool operator == (const char * s1, const eSTR::DString & s2) { return s2.Compare (s1) == 0; }
DSTRING_API inline bool operator != (const char * s1, const eSTR::DString & s2) { return s2.Compare (s1) != 0; }
DSTRING_API inline bool operator <  (const char * s1, const eSTR::DString & s2) { return s2.Compare (s1) > 0; }
DSTRING_API inline bool operator >  (const char * s1, const eSTR::DString & s2) { return s2.Compare (s1) < 0; }
DSTRING_API inline bool operator <= (const char * s1, const eSTR::DString & s2) { return s2.Compare (s1) >= 0; }
DSTRING_API inline bool operator >= (const char * s1, const eSTR::DString & s2) { return s2.Compare (s1) <= 0; }
#endif


#include "String.Format.tlh"

template <typename... Args>
inline void eSTR::DString::Format (const StringView & szFormat, Args && ... args)
{
	char * DString_TLSBuffer_Get ();
	int    DString_TLSBuffer_Size ();

	auto pb = DString_TLSBuffer_Get ();
	auto sz = DString_TLSBuffer_Size ();
	if (! pb)
	{
		this->Init ();
		return;
	}
	auto len = StringFormat (pb, sz).Format (szFormat, std::forward <Args> (args)...);

	auto pc = GetBufferSetLength (len);
	memcpy_s (pc, len, pb, len);
}


template <typename... Args>
static inline eSTR::DString eSTR::DString::FromFormat (const StringView & szFormat, Args && ... args)
{
	DString rc;
	rc.Format (szFormat, std::forward <Args> (args)...);
	return std::move (rc);
}


template <typename... Args>
inline void eSTR::DString::AppendFormat (const StringView & szFormat, Args && ... args)
{
	DString rc;
	rc.Format (szFormat, std::forward <Args> (args)...);
	Append (rc);
}



template <>
struct std::hash <eSTR::DString>
{
	size_t operator() (const char * pc) const noexcept
	{
		auto len = strlen (pc);
		return std::_Hash_array_representation (pc, len);
	}

	size_t operator () (const eSTR::DString & from) const noexcept
	{
		auto pc  = from.constBuffer ();
		auto len = from.GetLength ();
		return std::_Hash_array_representation (pc, len);
	}
};


#include "Hash.String.hpp"

//< 针对 DString 的 Hash. 目的是避免编译器的错误: 重载函数调用不明确
namespace ECOM::Utility
{
	inline constexpr size_t Hash (const String::DString & SV)
	{
		return (Hash (SV.To <String::DStringView> ()));
	}

}