cstr.cpp

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		CopyBeforeWrite();
		if (nIndex > nNewLength)
			nIndex = nNewLength;
		nNewLength += nInsertLength;

		if (stringData.nAllocLength < nNewLength)
		{
			CStrData* pOldData = GetData();
			LPTSTR pstr = stringData.data;
			AllocBuffer(nNewLength);
			WCE_FCTN(memcpy)(stringData.data, pstr, (pOldData->nDataLength+1)*sizeof(TCHAR));
			CStr::Release(pOldData);
		}

		// move existing bytes down
		WCE_FCTN(memcpy)(stringData.data + nIndex + nInsertLength,
			stringData.data + nIndex, 
			(nNewLength-nIndex-nInsertLength+1)*sizeof(TCHAR));
		WCE_FCTN(memcpy)(stringData.data + nIndex,
			pstr, nInsertLength*sizeof(TCHAR));
		stringData.nDataLength = nNewLength;
	}

	return nNewLength;
}

int CStr::Remove(TCHAR chRemove)
{
	CopyBeforeWrite();

	LPTSTR pstrSource = stringData.data;
	LPTSTR pstrDest = stringData.data;
	LPTSTR pstrEnd = stringData.data + stringData.nDataLength;

	while (pstrSource < pstrEnd)
	{
		if (*pstrSource != chRemove)
		{
			*pstrDest = *pstrSource;
			pstrDest = _tcsinc(pstrDest);
		}
		pstrSource = _tcsinc(pstrSource);
	}
	*pstrDest = '\0';
	int nCount = pstrSource - pstrDest;
	stringData.nDataLength -= nCount;

	return nCount;
}

// strspn equivalent
CStr CStr::SpanIncluding(LPCTSTR lpszCharSet) const
{
	ASSERT(AfxIsValidString(lpszCharSet));
	return Left(_tcsspn(stringData.data, lpszCharSet));
}

// strcspn equivalent
CStr CStr::SpanExcluding(LPCTSTR lpszCharSet) const
{
	ASSERT(AfxIsValidString(lpszCharSet));
	return Left(_tcscspn(stringData.data, lpszCharSet));
}

//////////////////////////////////////////////////////////////////////////////
// Finding


/////////////////////////////////////////////////////////////////////////////
// CStr formatting

#define TCHAR_ARG   TCHAR
#define WCHAR_ARG   WCHAR
#define CHAR_ARG    char

#if defined(_WIN32_WCE_CEPC) || defined(_WIN32_WCE_EMULATION)
	#define DOUBLE_ARG  _AFX_DOUBLE
#else // _WIN32_WCE
#ifdef _X86_
	#define DOUBLE_ARG  _AFX_DOUBLE
#else
	#define DOUBLE_ARG  double
#endif
#endif // _WIN32_WCE

#define FORCE_ANSI      0x10000
#define FORCE_UNICODE   0x20000
#define FORCE_INT64		0x40000

void CStr::FormatV(LPCTSTR lpszFormat, va_list argList)
{
	ASSERT(AfxIsValidString(lpszFormat));

	va_list argListSave = argList;

	// make a guess at the maximum length of the resulting string
	int nMaxLen = 0;
	for (LPCTSTR lpsz = lpszFormat; *lpsz != '\0'; lpsz = _tcsinc(lpsz))
	{
		// handle '%' character, but watch out for '%%'
		if (*lpsz != '%' || *(lpsz = _tcsinc(lpsz)) == '%')
		{
			nMaxLen += _tclen(lpsz);
			continue;
		}

		int nItemLen = 0;

		// handle '%' character with format
		int nWidth = 0;
		for (; *lpsz != '\0'; lpsz = _tcsinc(lpsz))
		{
			// check for valid flags
			if (*lpsz == '#')
				nMaxLen += 2;   // for '0x'
			else if (*lpsz == '*')
				nWidth = va_arg(argList, int);
			else if (*lpsz == '-' || *lpsz == '+' || *lpsz == '0' ||
				*lpsz == ' ')
				;
			else // hit non-flag character
				break;
		}
		// get width and skip it
		if (nWidth == 0)
		{
			// width indicated by
			nWidth = _ttoi(lpsz);
			for (; *lpsz != '\0' && _istdigit(*lpsz); lpsz = _tcsinc(lpsz))
				;
		}
		ASSERT(nWidth >= 0);

		int nPrecision = 0;
		if (*lpsz == '.')
		{
			// skip past '.' separator (width.precision)
			lpsz = _tcsinc(lpsz);

			// get precision and skip it
			if (*lpsz == '*')
			{
				nPrecision = va_arg(argList, int);
				lpsz = _tcsinc(lpsz);
			}
			else
			{
				nPrecision = _ttoi(lpsz);
				for (; *lpsz != '\0' && _istdigit(*lpsz); lpsz = _tcsinc(lpsz))
					;
			}
			ASSERT(nPrecision >= 0);
		}

		// should be on type modifier or specifier
		int nModifier = 0;
		if (_tcsncmp(lpsz, _T("I64"), 3) == 0)
		{
			lpsz += 3;
			nModifier = FORCE_INT64;
#if !defined(_WIN32_WCE)
#if !defined(_X86_) && !defined(_ALPHA_)
			// __int64 is only available on X86 and ALPHA platforms
			ASSERT(FALSE);
#endif
#endif // _WIN32_WCE
		}
		else
		{
			switch (*lpsz)
			{
			// modifiers that affect size
			case 'h':
				nModifier = FORCE_ANSI;
				lpsz = _tcsinc(lpsz);
				break;
			case 'l':
				nModifier = FORCE_UNICODE;
				lpsz = _tcsinc(lpsz);
				break;

			// modifiers that do not affect size
			case 'F':
			case 'N':
			case 'L':
				lpsz = _tcsinc(lpsz);
				break;
			}
		}

		// now should be on specifier
		switch (*lpsz | nModifier)
		{
		// single characters
		case 'c':
		case 'C':
			nItemLen = 2;
			va_arg(argList, TCHAR_ARG);
			break;
		case 'c'|FORCE_ANSI:
		case 'C'|FORCE_ANSI:
			nItemLen = 2;
			va_arg(argList, CHAR_ARG);
			break;
		case 'c'|FORCE_UNICODE:
		case 'C'|FORCE_UNICODE:
			nItemLen = 2;
			va_arg(argList, WCHAR_ARG);
			break;

		// strings
		case 's':
			{
				LPCTSTR pstrNextArg = va_arg(argList, LPCTSTR);
				if (pstrNextArg == NULL)
				   nItemLen = 6;  // "(null)"
				else
				{
				   nItemLen = lstrlen(pstrNextArg);
				   nItemLen = max(1, nItemLen);
				}
			}
			break;

		case 'S':
			{
#ifndef _UNICODE
				LPWSTR pstrNextArg = va_arg(argList, LPWSTR);
				if (pstrNextArg == NULL)
				   nItemLen = 6;  // "(null)"
				else
				{
				   nItemLen = wcslen(pstrNextArg);
				   nItemLen = max(1, nItemLen);
				}
#else
				LPCSTR pstrNextArg = va_arg(argList, LPCSTR);
				if (pstrNextArg == NULL)
				   nItemLen = 6; // "(null)"
				else
				{
				   nItemLen = lstrlenA(pstrNextArg);
				   nItemLen = max(1, nItemLen);
				}
#endif
			}
			break;

		case 's'|FORCE_ANSI:
		case 'S'|FORCE_ANSI:
			{
				LPCSTR pstrNextArg = va_arg(argList, LPCSTR);
				if (pstrNextArg == NULL)
				   nItemLen = 6; // "(null)"
				else
				{
				   nItemLen = lstrlenA(pstrNextArg);
				   nItemLen = max(1, nItemLen);
				}
			}
			break;

		case 's'|FORCE_UNICODE:
		case 'S'|FORCE_UNICODE:
			{
				LPWSTR pstrNextArg = va_arg(argList, LPWSTR);
				if (pstrNextArg == NULL)
				   nItemLen = 6; // "(null)"
				else
				{
				   nItemLen = wcslen(pstrNextArg);
				   nItemLen = max(1, nItemLen);
				}
			}
			break;
		}

		// adjust nItemLen for strings
		if (nItemLen != 0)
		{
			if (nPrecision != 0)
				nItemLen = min(nItemLen, nPrecision);
			nItemLen = max(nItemLen, nWidth);
		}
		else
		{
			switch (*lpsz)
			{
			// integers
			case 'd':
			case 'i':
			case 'u':
			case 'x':
			case 'X':
			case 'o':
				if (nModifier & FORCE_INT64)
					va_arg(argList, __int64);
				else
					va_arg(argList, int);
				nItemLen = 32;
				nItemLen = max(nItemLen, nWidth+nPrecision);
				break;

			case 'e':
			case 'g':
			case 'G':
				va_arg(argList, DOUBLE_ARG);
				nItemLen = 128;
				nItemLen = max(nItemLen, nWidth+nPrecision);
				break;

			case 'f':
				{
					double f;
					LPTSTR pszTemp;

					// 312 == strlen("-1+(309 zeroes).")
					// 309 zeroes == max precision of a double
					// 6 == adjustment in case precision is not specified,
					//   which means that the precision defaults to 6
					pszTemp = (LPTSTR)_alloca(max(nWidth, 312+nPrecision+6));

					f = va_arg(argList, double);
					_stprintf( pszTemp, _T( "%*.*f" ), nWidth, nPrecision+6, f );
					nItemLen = _tcslen(pszTemp);
				}
				break;

			case 'p':
				va_arg(argList, void*);
				nItemLen = 32;
				nItemLen = max(nItemLen, nWidth+nPrecision);
				break;

			// no output
			case 'n':
				va_arg(argList, int*);
				break;

			default:
				ASSERT(FALSE);  // unknown formatting option
			}
		}

		// adjust nMaxLen for output nItemLen
		nMaxLen += nItemLen;
	}

	GetBuffer(nMaxLen);
	VERIFY(_vstprintf(stringData.data, lpszFormat, argListSave) <= GetAllocLength());
	ReleaseBuffer();

	va_end(argListSave);
}

void AFX_CDECL CStr::Format(UINT nFormatID, ...)
{
	CStr strFormat;
	VERIFY(strFormat.LoadString(nFormatID) != 0);

	va_list argList;
	va_start(argList, nFormatID);
	FormatV(strFormat, argList);
	va_end(argList);
}

#if !defined(_WIN32_WCE)
// formatting (using FormatMessage style formatting)
void AFX_CDECL CStr::FormatMessage(LPCTSTR lpszFormat, ...)
{
	// format message into temporary buffer lpszTemp
	va_list argList;
	va_start(argList, lpszFormat);
	LPTSTR lpszTemp;

	if (::FormatMessage(FORMAT_MESSAGE_FROM_STRING|FORMAT_MESSAGE_ALLOCATE_BUFFER,
		lpszFormat, 0, 0, (LPTSTR)&lpszTemp, 0, &argList) == 0 ||
		lpszTemp == NULL)
	{
		AfxThrowMemoryException();
	}

	// assign lpszTemp into the resulting string and free the temporary
	*this = lpszTemp;
	LocalFree(lpszTemp);
	va_end(argList);
}

void AFX_CDECL CStr::FormatMessage(UINT nFormatID, ...)
{
	// get format string from string table
	CStr strFormat;
	VERIFY(strFormat.LoadString(nFormatID) != 0);

	// format message into temporary buffer lpszTemp
	va_list argList;
	va_start(argList, nFormatID);
	LPTSTR lpszTemp;
	if (::FormatMessage(FORMAT_MESSAGE_FROM_STRING|FORMAT_MESSAGE_ALLOCATE_BUFFER,
		strFormat, 0, 0, (LPTSTR)&lpszTemp, 0, &argList) == 0 ||
		lpszTemp == NULL)
	{
		AfxThrowMemoryException();
	}

	// assign lpszTemp into the resulting string and free lpszTemp
	*this = lpszTemp;
	LocalFree(lpszTemp);
	va_end(argList);
}
#endif // _WIN32_WCE

///////////////////////////////////////////////////////////////////////////////
// CStr support for template collections

#if _MSC_VER >= 1100
template<> void AFXAPI ConstructElements<CStr> (CStr* pElements, int nCount)
#else
void AFXAPI ConstructElements(CStr* pElements, int nCount)
#endif
{
	ASSERT(nCount == 0 ||
		AfxIsValidAddress(pElements, nCount * sizeof(CStr)));

	for (; nCount--; ++pElements)
		WCE_FCTN(memcpy)(pElements, &afxEmptyString, sizeof(*pElements));
}

#if _MSC_VER >= 1100
template<> void AFXAPI DestructElements<CStr> (CStr* pElements, int nCount)
#else
void AFXAPI DestructElements(CStr* pElements, int nCount)
#endif
{
	ASSERT(nCount == 0 ||
		AfxIsValidAddress(pElements, nCount * sizeof(CStr)));

	for (; nCount--; ++pElements)
		pElements->~CStr();
}

#if _MSC_VER >= 1100
template<> void AFXAPI CopyElements<CStr> (CStr* pDest, const CStr* pSrc, int nCount)
#else
void AFXAPI CopyElements(CStr* pDest, const CStr* pSrc, int nCount)
#endif
{
	ASSERT(nCount == 0 ||
		AfxIsValidAddress(pDest, nCount * sizeof(CStr)));
	ASSERT(nCount == 0 ||
		AfxIsValidAddress(pSrc, nCount * sizeof(CStr)));

	for (; nCount--; ++pDest, ++pSrc)
		*pDest = *pSrc;
}

#ifndef OLE2ANSI
#if _MSC_VER >= 1100
template<> UINT AFXAPI HashKey<LPCWSTR> (LPCWSTR key)
#else
UINT AFXAPI HashKey(LPCWSTR key)
#endif
{
	UINT nHash = 0;
	while (*key)
		nHash = (nHash<<5) + nHash + *key++;
	return nHash;
}
#endif

#if _MSC_VER >= 1100
template<> UINT AFXAPI HashKey<LPCSTR> (LPCSTR key)
#else
UINT AFXAPI HashKey(LPCSTR key)
#endif
{
	UINT nHash = 0;
	while (*key)
		nHash = (nHash<<5) + nHash + *key++;
	return nHash;
}
*/
UINT HashKey(LPCTSTR key)
{
	UINT nHash = 0;
	while (*key)
		nHash = (nHash<<5) + nHash + *key++;
	return nHash;
}
///////////////////////////////////////////////////////////////////////////////