stdstring.h

用bcg库编写的java IDE 源码

		#define SSA2W(pa) (\
			((_pa = pa) == 0) ? 0 : (\
				_cvt = (strlen(_pa)+1),\
				StdCodeCvt((PWSTR) _alloca(_cvt*2), _pa, _cvt)))
		#define SSW2A(pw) (\
			((_pw = pw) == 0) ? 0 : (\
				_cvt = (wcslen(_pw)+1)*2,\
				StdCodeCvt((LPSTR) _alloca(_cvt), _pw, _cvt)))
	#endif

	#define SSA2CW(pa) ((PCWSTR)SSA2W((pa)))
	#define SSW2CA(pw) ((PCSTR)SSW2A((pw)))

	#ifdef UNICODE
		#define SST2A	SSW2A
		#define SSA2T	SSA2W
		#define SST2CA	SSW2CA
		#define SSA2CT	SSA2CW
		inline PWSTR	SST2W(PTSTR p)			{ return p; }
		inline PTSTR	SSW2T(PWSTR p)			{ return p; }
		inline PCWSTR	SST2CW(PCTSTR p)		{ return p; }
		inline PCTSTR	SSW2CT(PCWSTR p)		{ return p; }
	#else
		#define SST2W	SSA2W
		#define SSW2T	SSW2A
		#define SST2CW	SSA2CW
		#define SSW2CT	SSW2CA
		inline PSTR		SST2A(PTSTR p)			{ return p; }
		inline PTSTR	SSA2T(PSTR p)			{ return p; }
		inline PCSTR	SST2CA(PCTSTR p)		{ return p; }
		inline PCTSTR	SSA2CT(PCSTR p)			{ return p; }
	#endif // #ifdef UNICODE

	#if defined(UNICODE)
	// in these cases the default (TCHAR) is the same as OLECHAR
		inline PCOLESTR	SST2COLE(PCTSTR p)		{ return p; }
		inline PCTSTR	SSOLE2CT(PCOLESTR p)	{ return p; }
		inline POLESTR	SST2OLE(PTSTR p)		{ return p; }
		inline PTSTR	SSOLE2T(POLESTR p)		{ return p; }
	#elif defined(OLE2ANSI)
	// in these cases the default (TCHAR) is the same as OLECHAR
		inline PCOLESTR	SST2COLE(PCTSTR p)		{ return p; }
		inline PCTSTR	SSOLE2CT(PCOLESTR p)	{ return p; }
		inline POLESTR	SST2OLE(PTSTR p)		{ return p; }
		inline PTSTR	SSOLE2T(POLESTR p)		{ return p; }
	#else
		//CharNextW doesn't work on Win95 so we use this
		#define SST2COLE(pa)	SSA2CW((pa))
		#define SST2OLE(pa)		SSA2W((pa))
		#define SSOLE2CT(po)	SSW2CA((po))
		#define SSOLE2T(po)		SSW2A((po))
	#endif

	#ifdef OLE2ANSI
		#define SSW2OLE		SSW2A
		#define SSOLE2W		SSA2W
		#define SSW2COLE	SSW2CA
		#define SSOLE2CW	SSA2CW
		inline POLESTR		SSA2OLE(PSTR p)		{ return p; }
		inline PSTR			SSOLE2A(POLESTR p)	{ return p; }
		inline PCOLESTR		SSA2COLE(PCSTR p)	{ return p; }
		inline PCSTR		SSOLE2CA(PCOLESTR p){ return p; }
	#else
		#define SSA2OLE		SSA2W
		#define SSOLE2A		SSW2A
		#define SSA2COLE	SSA2CW
		#define SSOLE2CA	SSW2CA
		inline POLESTR		SSW2OLE(PWSTR p)	{ return p; }
		inline PWSTR		SSOLE2W(POLESTR p)	{ return p; }
		inline PCOLESTR		SSW2COLE(PCWSTR p)	{ return p; }
		inline PCWSTR		SSOLE2CW(PCOLESTR p){ return p; }
	#endif

	// Above we've defined macros that look like MS' but all have
	// an 'SS' prefix.  Now we need the real macros.  We'll either
	// get them from the macros above or from MFC/ATL.  If
	// SS_NO_CONVERSION is #defined, we'll forgo them

	#ifndef SS_NO_CONVERSION

		#if defined (USES_CONVERSION)

			#define _NO_STDCONVERSION	// just to be consistent

		#else

			#ifdef _MFC_VER

				#include <afxconv.h>
				#define _NO_STDCONVERSION // just to be consistent

			#else

				#define USES_CONVERSION SSCVT
				#define A2CW			SSA2CW
				#define W2CA			SSW2CA
				#define T2A				SST2A
				#define A2T				SSA2T
				#define T2W				SST2W
				#define W2T				SSW2T
				#define T2CA			SST2CA
				#define A2CT			SSA2CT
				#define T2CW			SST2CW
				#define W2CT			SSW2CT
				#define ocslen			sslen
				#define ocscpy			sscpy
				#define T2COLE			SST2COLE
				#define OLE2CT			SSOLE2CT
				#define T2OLE			SST2COLE
				#define OLE2T			SSOLE2CT
				#define A2OLE			SSA2OLE
				#define OLE2A			SSOLE2A
				#define W2OLE			SSW2OLE
				#define OLE2W			SSOLE2W
				#define A2COLE			SSA2COLE
				#define OLE2CA			SSOLE2CA
				#define W2COLE			SSW2COLE
				#define OLE2CW			SSOLE2CW
		
			#endif // #ifdef _MFC_VER
		#endif // #ifndef USES_CONVERSION
	#endif // #ifndef SS_NO_CONVERSION

	// Define ostring - generic name for std::basic_string<OLECHAR>

	#if !defined(ostring) && !defined(OSTRING_DEFINED)
		typedef std::basic_string<OLECHAR> ostring;
		#define OSTRING_DEFINED
	#endif

#endif // #ifndef SS_ANSI

// StdCodeCvt when there's no conversion to be done
inline PSTR StdCodeCvt(PSTR pDst, PCSTR pSrc, int nChars)
{
	if ( nChars > 0 )
	{
		pDst[0]				= '\0';
		std::basic_string<char>::traits_type::copy(pDst, pSrc, nChars);
//		std::char_traits<char>::copy(pDst, pSrc, nChars);
		if ( nChars > 0 )
			pDst[nChars]	= '\0';
	}

	return pDst;
}
inline PSTR StdCodeCvt(PSTR pDst, PCUSTR pSrc, int nChars)
{
	return StdCodeCvt(pDst, (PCSTR)pSrc, nChars);
}
inline PUSTR StdCodeCvt(PUSTR pDst, PCSTR pSrc, int nChars)
{
	return (PUSTR)StdCodeCvt((PSTR)pDst, pSrc, nChars);
}

inline PWSTR StdCodeCvt(PWSTR pDst, PCWSTR pSrc, int nChars)
{
	if ( nChars > 0 )
	{
		pDst[0]				= '\0';
		std::basic_string<wchar_t>::traits_type::copy(pDst, pSrc, nChars);
//		std::char_traits<wchar_t>::copy(pDst, pSrc, nChars);
		if ( nChars > 0 )
			pDst[nChars]	= '\0';
	}

	return pDst;
}


// Define tstring -- generic name for std::basic_string<TCHAR>

#if !defined(tstring) && !defined(TSTRING_DEFINED)
	typedef std::basic_string<TCHAR> tstring;
	#define TSTRING_DEFINED
#endif

// a very shorthand way of applying the fix for KB problem Q172398
// (basic_string assignment bug)

#if defined ( _MSC_VER ) && ( _MSC_VER < 1200 )
	#define Q172398(x) (x).erase()
#else
	#define Q172398(x)
#endif

// =============================================================================
// INLINE FUNCTIONS ON WHICH CSTDSTRING RELIES
//
// Usually for generic text mapping, we rely on preprocessor macro definitions
// to map to string functions.  However the CStdStr<> template cannot use
// macro-based generic text mappings because its character types do not get
// resolved until template processing which comes AFTER macro processing.  In
// other words, UNICODE is of little help to us in the CStdStr template
//
// Therefore, to keep the CStdStr declaration simple, we have these inline
// functions.  The template calls them often.  Since they are inline (and NOT
// exported when this is built as a DLL), they will probably be resolved away
// to nothing. 
//
// Without these functions, the CStdStr<> template would probably have to broken
// out into two, almost identical classes.  Either that or it would be a huge,
// convoluted mess, with tons of "if" statements all over the place checking the
// size of template parameter CT.
// 
// In several cases, you will see two versions of each function.  One version is
// the more portable, standard way of doing things, while the other is the
// non-standard, but often significantly faster Visual C++ way.
// =============================================================================

// If they defined SS_NO_REFCOUNT, then we must convert all assignments

#ifdef SS_NO_REFCOUNT
	#define SSREF(x) (x).c_str()
#else
	#define SSREF(x) (x)
#endif

// -----------------------------------------------------------------------------
// sslen: strlen/wcslen wrappers
// -----------------------------------------------------------------------------
template<typename CT> inline int sslen(const CT* pT)
{
	return 0 == pT ? 0 : std::basic_string<CT>::traits_type::length(pT);
//	return 0 == pT ? 0 : std::char_traits<CT>::length(pT);
}
inline SS_NOTHROW int sslen(const std::string& s)
{
	return s.length();
}
inline SS_NOTHROW int sslen(const std::wstring& s)
{
	return s.length();
}

// -----------------------------------------------------------------------------
// sstolower/sstoupper -- convert characters to upper/lower case
// -----------------------------------------------------------------------------
#if !defined(SS_ANSI) || defined(SS_NO_LOCALE)
	inline char sstoupper(char ch)		{ return (char)::toupper(ch); }
	inline wchar_t sstoupper(wchar_t ch){ return (wchar_t)::towupper(ch); }
	inline char sstolower(char ch)		{ return (char)::tolower(ch); }
	inline wchar_t sstolower(wchar_t ch){ return (wchar_t)::tolower(ch); }
#else
	template<typename CT>
	inline CT sstolower(const CT& t, const std::locale& lo =std::locale())
	{
		return std::tolower<CT>(t, loc);
	}
	template<typename CT>
	inline CT sstoupper(const CT& t, const std::locale& lo =std::locale())
	{
		return std::toupper<CT>(t, loc);
	}
#endif

// -----------------------------------------------------------------------------
// ssasn: assignment functions -- assign "sSrc" to "sDst"
// -----------------------------------------------------------------------------
typedef std::string::size_type		SS_SIZETYPE; // just for shorthand, really
typedef std::string::pointer		SS_PTRTYPE;  
typedef std::wstring::size_type		SW_SIZETYPE;
typedef std::wstring::pointer		SW_PTRTYPE;  

inline void	ssasn(std::string& sDst, const std::string& sSrc)
{
	if ( sDst.c_str() != sSrc.c_str() )
	{
		sDst.erase();
		sDst.assign(SSREF(sSrc));
	}
}
inline void	ssasn(std::string& sDst, PCSTR pA)
{
	// Watch out for NULLs, as always.

	if ( 0 == pA )
	{
		sDst.erase();
	}

	// If pA actually points to part of sDst, we must NOT erase(), but
	// rather take a substring

	else if ( pA >= sDst.c_str() && pA <= sDst.c_str() + sDst.size() )
	{
		sDst =sDst.substr(static_cast<SS_SIZETYPE>(pA-sDst.c_str()));
	}

	// Otherwise (most cases) apply the assignment bug fix, if applicable
	// and do the assignment

	else
	{
		Q172398(sDst);
		sDst.assign(pA);
	}
}
inline void	ssasn(std::string& sDst, const std::wstring& sSrc)
{
	int nLen	= sSrc.size();
	sDst.resize(nLen * 2 + 1);
	StdCodeCvt(const_cast<SS_PTRTYPE>(sDst.data()), sSrc.c_str(), nLen);
	sDst.resize(nLen);
}
inline void	ssasn(std::string& sDst, PCWSTR pW)
{
	int nLen	= sslen(pW);
	sDst.resize(nLen * 2 + 1);
	StdCodeCvt(const_cast<SS_PTRTYPE>(sDst.data()), pW, nLen);
	sDst.resize(nLen);
}
inline void ssasn(std::string& sDst, const int nNull)
{
	UNUSED(nNull);
	ASSERT(nNull==0);
	sDst.assign("");
}	
inline void	ssasn(std::wstring& sDst, const std::wstring& sSrc)
{
	if ( sDst.c_str() != sSrc.c_str() )
	{
		sDst.erase();
		sDst.assign(SSREF(sSrc));
	}
}
inline void	ssasn(std::wstring& sDst, PCWSTR pW)
{
	// Watch out for NULLs, as always.

	if ( 0 == pW )
	{
		sDst.erase();
	}

	// If pW actually points to part of sDst, we must NOT erase(), but
	// rather take a substring

	else if ( pW >= sDst.c_str() && pW <= sDst.c_str() + sDst.size() )
	{
		sDst = sDst.substr(static_cast<SW_SIZETYPE>(pW-sDst.c_str()));
	}

	// Otherwise (most cases) apply the assignment bug fix, if applicable
	// and do the assignment

	else
	{
		Q172398(sDst);
		sDst.assign(pW);
	}
}
#undef StrSizeType
inline void	ssasn(std::wstring& sDst, const std::string& sSrc)
{
	int nLen	= sSrc.size();
	sDst.resize(nLen+1);
	StdCodeCvt(const_cast<SW_PTRTYPE>(sDst.data()), sSrc.c_str(), nLen+1);
	sDst.resize(wcslen(sDst.data()));
}
inline void	ssasn(std::wstring& sDst, PCSTR pA)
{
	int nLen	= sslen(pA);
	sDst.resize(nLen+1);
	StdCodeCvt(const_cast<SW_PTRTYPE>(sDst.data()), pA, nLen+1);
	sDst.resize(wcslen(sDst.data()));
}
inline void ssasn(std::wstring& sDst, const int nNull)
{
	UNUSED(nNull);
	ASSERT(nNull==0);
	sDst.assign(L"");
}


// -----------------------------------------------------------------------------
// ssadd: string object concatenation -- add second argument to first
// -----------------------------------------------------------------------------
inline void	ssadd(std::string& sDst, const std::wstring& sSrc)
{
	int nSrcLen	= sSrc.size();
	int nDstLen	= sDst.size();
	int nEndLen	= nSrcLen + nDstLen;
	sDst.resize(nEndLen + 1);
	StdCodeCvt(const_cast<SS_PTRTYPE>(sDst.data()+nDstLen), sSrc.c_str(), nSrcLen);
	sDst.resize(nEndLen);
}
inline void	ssadd(std::string& sDst, const std::string& sSrc)
{
	if ( &sDst == &sSrc )
		sDst.reserve(2*sDst.size());

	sDst.append(sSrc.c_str());
}
inline void	ssadd(std::string& sDst, PCWSTR pW)