tstring.cpp

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	while (*lpsz != '\0')
	{
		if (*lpsz == chTarget)
		{
			if (lpszLast == NULL)
				lpszLast = lpsz;
		}
		else
			lpszLast = NULL;
		lpsz = _tcsinc(lpsz);
	}

	if (lpszLast != NULL)
	{
		// truncate at left-most matching character
		*lpszLast = '\0';
		GetData()->nDataLength = lpszLast - m_pchData;
	}
	*/
}

// remove continuous occcurrences of characters in passed string,
// starting from right
void TString::TrimRight(TLPCTSTR lpszTargetList)
{
	// find beginning of trailing matches
	// by starting at beginning (DBCS aware)
return;
/*	CopyBeforeWrite();
	LPTSTR lpsz = m_pchData;
	LPTSTR lpszLast = NULL;

	while (*lpsz != '\0')
	{
		if (_tcschr(lpszTargetList, *lpsz) != NULL)
		{
			if (lpszLast == NULL)
				lpszLast = lpsz;
		}
		else
			lpszLast = NULL;
		lpsz = _tcsinc(lpsz);
	}

	if (lpszLast != NULL)
	{
		// truncate at left-most matching character
		*lpszLast = '\0';
		GetData()->nDataLength = lpszLast - m_pchData;
	}
	*/
}	

// remove continuous occurrences of chTarget starting from left
void TString::TrimLeft(char chTarget)
{
	// find first non-matching character
return;
/*	CopyBeforeWrite();
	LPCTSTR lpsz = m_pchData;

	while (chTarget == *lpsz)
		lpsz = _tcsinc(lpsz);

	if (lpsz != m_pchData)
	{
		// fix up data and length
		int nDataLength = GetData()->nDataLength - (lpsz - m_pchData);
		memmove(m_pchData, lpsz, (nDataLength+1)*sizeof(TCHAR));
		GetData()->nDataLength = nDataLength;
	}
	*/
}

// remove continuous occcurrences of characters in
// passed string, starting from left
void TString::TrimLeft(TLPCTSTR lpszTargets)
{
	// if we're not trimming anything, we're not doing any work
	return;
/*	if (SafeStrlen(lpszTargets) == 0)
		return;

	CopyBeforeWrite();
	LPCTSTR lpsz = m_pchData;

	while (*lpsz != '\0')
	{
		if (_tcschr(lpszTargets, *lpsz) == NULL)
			break;
		lpsz = _tcsinc(lpsz);
	}

	if (lpsz != m_pchData)
	{
		// fix up data and length
		int nDataLength = GetData()->nDataLength - (lpsz - m_pchData);
		memmove(m_pchData, lpsz, (nDataLength+1)*sizeof(TCHAR));
		GetData()->nDataLength = nDataLength;
	}
	*/
}

// advanced manipulation=========================================

// replace occurrences of chOld with chNew
int TString::Replace(char chOld, char chNew)
{
	int nCount = 0;

	// short-circuit the nop case
/*	if (chOld != chNew)
	{
		// otherwise modify each character that matches in the string
		CopyBeforeWrite();
		LPTSTR psz = m_pchData;
		LPTSTR pszEnd = psz + GetData()->nDataLength;
		while (psz < pszEnd)
		{
			// replace instances of the specified character only
			if (*psz == chOld)
			{
				*psz = chNew;
				nCount++;
			}
			psz = _tcsinc(psz);
		}
	}*/
	return nCount;
}

// replace occurrences of substring lpszOld with lpszNew;
// empty lpszNew removes instances of lpszOld
int TString::Replace(TLPCTSTR lpszOld, TLPCTSTR lpszNew)
{
	// can't have empty or NULL lpszOld
return 0;
/*	int nSourceLen = SafeStrlen(lpszOld);
	if (nSourceLen == 0)
		return 0;
	int nReplacementLen = SafeStrlen(lpszNew);

	// loop once to figure out the size of the result string
	int nCount = 0;
	LPTSTR lpszStart = m_pchData;
	LPTSTR lpszEnd = m_pchData + GetData()->nDataLength;
	LPTSTR lpszTarget;
	while (lpszStart < lpszEnd)
	{
		while ((lpszTarget = _tcsstr(lpszStart, lpszOld)) != NULL)
		{
			nCount++;
			lpszStart = lpszTarget + nSourceLen;
		}
		lpszStart += lstrlen(lpszStart) + 1;
	}

	// if any changes were made, make them
	if (nCount > 0)
	{
		CopyBeforeWrite();

		// if the buffer is too small, just
		//   allocate a new buffer (slow but sure)
		int nOldLength = GetData()->nDataLength;
		int nNewLength =  nOldLength + (nReplacementLen-nSourceLen)*nCount;
		if (GetData()->nAllocLength < nNewLength || GetData()->nRefs > 1)
		{
			CStringData* pOldData = GetData();
			LPTSTR pstr = m_pchData;
			AllocBuffer(nNewLength);
			memcpy(m_pchData, pstr, pOldData->nDataLength*sizeof(TCHAR));
			CString::Release(pOldData);
		}
		// else, we just do it in-place
		lpszStart = m_pchData;
		lpszEnd = m_pchData + GetData()->nDataLength;

		// loop again to actually do the work
		while (lpszStart < lpszEnd)
		{
			while ( (lpszTarget = _tcsstr(lpszStart, lpszOld)) != NULL)
			{
				int nBalance = nOldLength - (lpszTarget - m_pchData + nSourceLen);
				memmove(lpszTarget + nReplacementLen, lpszTarget + nSourceLen,
					nBalance * sizeof(TCHAR));
				memcpy(lpszTarget, lpszNew, nReplacementLen*sizeof(TCHAR));
				lpszStart = lpszTarget + nReplacementLen;
				lpszStart[nBalance] = '\0';
				nOldLength += (nReplacementLen - nSourceLen);
			}
			lpszStart += lstrlen(lpszStart) + 1;
		}
		ASSERT(m_pchData[nNewLength] == '\0');
		GetData()->nDataLength = nNewLength;
	}

	return nCount;*/
}

// remove occurrences of chRemove
int TString::Remove(char chRemove)
{
return 0;
	/*CopyBeforeWrite();

	LPTSTR pstrSource = m_pchData;
	LPTSTR pstrDest = m_pchData;
	LPTSTR pstrEnd = m_pchData + GetData()->nDataLength;

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

	return nCount;*/
}

// insert character at zero-based index; concatenates
// if index is past end of string
int TString::Insert(int nIndex, char ch)
{
	CopyBeforeWrite();

	if (nIndex < 0)
		nIndex = 0;

	int nNewLength = GetData()->nDataLength;
	if (nIndex > nNewLength)
		nIndex = nNewLength;
	nNewLength++;

	if (GetData()->nAllocLength < nNewLength)
	{
		TStringData* pOldData = GetData();
		TLPTSTR pstr = m_pchData;
		AllocBuffer(nNewLength);
		memcpy(m_pchData, pstr, (pOldData->nDataLength+1)*sizeof(char));
		TString::Release(pOldData);
	}

	// move existing bytes down
	memcpy(m_pchData + nIndex + 1,
		m_pchData + nIndex, (nNewLength-nIndex)*sizeof(char));
	m_pchData[nIndex] = ch;
	GetData()->nDataLength = nNewLength;

	return nNewLength;
}	

// insert substring at zero-based index; concatenates
// if index is past end of string
int TString::Insert(int nIndex, TLPCTSTR pstr)
{
	if (nIndex < 0)
		nIndex = 0;

	int nInsertLength = SafeStrlen(pstr);
	int nNewLength = GetData()->nDataLength;
	if (nInsertLength > 0)
	{
		CopyBeforeWrite();
		if (nIndex > nNewLength)
			nIndex = nNewLength;
		nNewLength += nInsertLength;

		if (GetData()->nAllocLength < nNewLength)
		{
			TStringData* pOldData = GetData();
			TLPTSTR pstr = m_pchData;
			AllocBuffer(nNewLength);
			memcpy(m_pchData, pstr, (pOldData->nDataLength+1)*sizeof(char));
			TString::Release(pOldData);
		}

		// move existing bytes down
		memcpy(m_pchData + nIndex + nInsertLength,
			m_pchData + nIndex,
			(nNewLength-nIndex-nInsertLength+1)*sizeof(char));
		memcpy(m_pchData + nIndex,
			pstr, nInsertLength*sizeof(char));
		GetData()->nDataLength = nNewLength;
	}

	return nNewLength;
}

// delete nCount characters starting at zero-based index
int TString::Delete(int nIndex, int nCount /* = 1 */)
{
	if (nIndex < 0)
		nIndex = 0;
	int nNewLength = GetData()->nDataLength;
	if (nCount > 0 && nIndex < nNewLength)
	{
		CopyBeforeWrite();
		int nBytesToCopy = nNewLength - (nIndex + nCount) + 1;

		memcpy(m_pchData + nIndex,
			m_pchData + nIndex + nCount, nBytesToCopy * sizeof(char));
		GetData()->nDataLength = nNewLength - nCount;
	}

	return nNewLength;
}

///////////////////////////////////////////////////////////////////////////////
// Commonly used routines (rarely used routines in STREX.CPP)

// searching==================================================================

// find character starting at left, -1 if not found

int TString::Find(char ch) const
{
	return Find(ch, 0);
}

// find character starting at zero-based index and going right
int TString::Find(char ch, int nStart) const
{
	return 0;
/*	int nLength = GetData()->nDataLength;
	if (nStart >= nLength)
		return -1;

	// find first single character
	TLPTSTR lpsz = _tcschr(m_pchData + nStart, (_TUCHAR)ch);

	// return -1 if not found and index otherwise
	return (lpsz == NULL) ? -1 : (int)(lpsz - m_pchData);
	*/
}

// find character starting at right
int TString::ReverseFind(char ch) const
{
return 0;
	// find last single character
/*	TLPTSTR lpsz = _tcsrchr(m_pchData, (_TUCHAR) ch);

	// return -1 if not found, distance from beginning otherwise
	return (lpsz == NULL) ? -1 : (int)(lpsz - m_pchData);
	*/
}

int TString::FindOneOf(TLPCTSTR lpszCharSet) const
{
	//ASSERT(AfxIsValidString(lpszCharSet));
	return 0;
	/*
	TLPTSTR lpsz = _tcspbrk(m_pchData, lpszCharSet);
	return (lpsz == NULL) ? -1 : (int)(lpsz - m_pchData);
	*/
}

// find first instance of substring
// find a sub-string (like strstr)
int TString::Find(TLPCTSTR lpszSub) const
{
	return Find(lpszSub, 0);
}

int TString::Find(TLPCTSTR lpszSub, int nStart) const
{
	//ASSERT(AfxIsValidString(lpszSub));
return 0;
/*	int nLength = GetData()->nDataLength;
	if (nStart > nLength)
		return -1;

	// find first matching substring
	LPTSTR lpsz = _tcsstr(m_pchData + nStart, lpszSub);

	// return -1 for not found, distance from beginning otherwise
	return (lpsz == NULL) ? -1 : (int)(lpsz - m_pchData);
	*/
}