当前位置: 首页>>代码示例>>C++>>正文

C++ CopyBeforeWrite函数代码示例

本文整理汇总了C++中CopyBeforeWrite函数的典型用法代码示例。如果您正苦于以下问题：C++ CopyBeforeWrite函数的具体用法？C++ CopyBeforeWrite怎么用？C++ CopyBeforeWrite使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。


在下文中一共展示了CopyBeforeWrite函数的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: throw

/*
 * @implemented
 */
void CHString::TrimLeft() throw (CHeap_Exception)
{
    int NewBegin;
    int NewLength;
    WCHAR *CurrentChar;

    // We'll modify, so copy first
    CopyBeforeWrite();

    // Start at the begin of the string
    CurrentChar = m_pchData;
    while (*CurrentChar != 0)
    {
        // Browse string till we find something which is not a space
        if (!iswspace(*CurrentChar))
        {
            break;
        }

        CurrentChar++;
    }

    // Then, calculate new begin (easy) and new length
    // And move memory
    NewBegin = (CurrentChar - m_pchData);
    NewLength = GetData()->nDataLength - NewBegin;
    memmove(m_pchData, CurrentChar, NewLength * sizeof(WCHAR));
    GetData()->nDataLength = NewLength;
}
开发者ID:RPG-7，项目名称:reactos，代码行数:32，代码来源:chstring.cpp

示例2: SafeStrlen

int CString::Insert(int nIndex, LPCTSTR 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)
		{
			CStringData* pOldData = GetData();
			LPTSTR pstr = m_pchData;
			AllocBuffer(nNewLength);
			memcpy(m_pchData, pstr, (pOldData->nDataLength+1)*sizeof(TCHAR));
			CString::Release(pOldData);
		}

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

	return nNewLength;
}
开发者ID:ngphloc，项目名称:agmagic，代码行数:34，代码来源:strex.cpp

示例3: CopyBeforeWrite

FX_STRSIZE CFX_WideString::Insert(FX_STRSIZE nIndex, FX_WCHAR ch)
{
    CopyBeforeWrite();
    if (nIndex < 0) {
        nIndex = 0;
    }
    FX_STRSIZE nNewLength = GetLength();
    if (nIndex > nNewLength) {
        nIndex = nNewLength;
    }
    nNewLength++;
    if (m_pData == NULL || m_pData->m_nAllocLength < nNewLength) {
        StringData* pOldData = m_pData;
        const FX_WCHAR* pstr = m_pData->m_String;
        m_pData = StringData::Create(nNewLength);
        if (!m_pData) {
            return 0;
        }
        if(pOldData != NULL) {
            FXSYS_memmove(m_pData->m_String, pstr, (pOldData->m_nDataLength + 1)*sizeof(FX_WCHAR));
            pOldData->Release();
        } else {
            m_pData->m_String[0] = 0;
        }
    }
    FXSYS_memmove(m_pData->m_String + nIndex + 1,
                    m_pData->m_String + nIndex, (nNewLength - nIndex)*sizeof(FX_WCHAR));
    m_pData->m_String[nIndex] = ch;
    m_pData->m_nDataLength = nNewLength;
    return nNewLength;
}
开发者ID:mariospr，项目名称:chromium-browser，代码行数:31，代码来源:fx_basic_wstring.cpp

示例4: CopyBeforeWrite

int CString::Insert(int nIndex, TCHAR ch)
{
	CopyBeforeWrite();

	if (nIndex < 0)
		nIndex = 0;

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

	if (GetData()->nAllocLength < nNewLength)
	{
		CStringData* pOldData = GetData();
		LPTSTR pstr = m_pchData;
		AllocBuffer(nNewLength);
		memcpy(m_pchData, pstr, (pOldData->nDataLength+1)*sizeof(TCHAR));
		CString::Release(pOldData);
	}

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

	return nNewLength;
}
开发者ID:ngphloc，项目名称:agmagic，代码行数:29，代码来源:strex.cpp

示例5: ASSERT

void CString::SetAt(int nIndex, TCHAR ch)
{
	ASSERT(nIndex >= 0);
	ASSERT(nIndex < GetData()->nDataLength);

	CopyBeforeWrite();
	m_pchData[nIndex] = ch;
}
开发者ID:rickerliang，项目名称:OpenNT，代码行数:8，代码来源:strcore.cpp

示例6: ASSERT

void CFX_WideString::SetAt(FX_STRSIZE nIndex, FX_WCHAR ch) {
  if (m_pData == NULL) {
    return;
  }
  ASSERT(nIndex >= 0);
  ASSERT(nIndex < m_pData->m_nDataLength);
  CopyBeforeWrite();
  m_pData->m_String[nIndex] = ch;
}
开发者ID:hoanganhx86，项目名称:pdfium，代码行数:9，代码来源:fx_basic_wstring.cpp

示例7: CopyBeforeWrite

void CFX_WideString::MakeUpper() {
  if (m_pData == NULL) {
    return;
  }
  CopyBeforeWrite();
  if (GetLength() < 1) {
    return;
  }
  FXSYS_wcsupr(m_pData->m_String);
}
开发者ID:hoanganhx86，项目名称:pdfium，代码行数:10，代码来源:fx_basic_wstring.cpp

示例8: CopyBeforeWrite

void CString::ReleaseBuffer(int nNewLength)
{
	CopyBeforeWrite();  // just in case GetBuffer was not called

	if (nNewLength == -1)
		nNewLength = lstrlen(m_pchData); // zero terminated

	ASSERT(nNewLength <= GetData()->nAllocLength);
	GetData()->nDataLength = nNewLength;
	m_pchData[nNewLength] = '\0';
}
开发者ID:rickerliang，项目名称:OpenNT，代码行数:11，代码来源:strcore.cpp

示例9: FXSYS_wcslen

FX_STRSIZE CFX_WideString::Replace(const FX_WCHAR* lpszOld, const FX_WCHAR* lpszNew)
{
    if (GetLength() < 1) {
        return 0;
    }
    if (lpszOld == NULL) {
        return 0;
    }
    FX_STRSIZE nSourceLen = FXSYS_wcslen(lpszOld);
    if (nSourceLen == 0) {
        return 0;
    }
    FX_STRSIZE nReplacementLen = lpszNew ? FXSYS_wcslen(lpszNew) : 0;
    FX_STRSIZE nCount = 0;
    FX_WCHAR* lpszStart = m_pData->m_String;
    FX_WCHAR* lpszEnd = m_pData->m_String + m_pData->m_nDataLength;
    FX_WCHAR* lpszTarget;
    {
        while ((lpszTarget = (FX_WCHAR*)FXSYS_wcsstr(lpszStart, lpszOld)) != NULL && lpszStart < lpszEnd) {
            nCount++;
            lpszStart = lpszTarget + nSourceLen;
        }
    }
    if (nCount > 0) {
        CopyBeforeWrite();
        FX_STRSIZE nOldLength = m_pData->m_nDataLength;
        FX_STRSIZE nNewLength =  nOldLength + (nReplacementLen - nSourceLen) * nCount;
        if (m_pData->m_nAllocLength < nNewLength || m_pData->m_nRefs > 1) {
            StringData* pOldData = m_pData;
            const FX_WCHAR* pstr = m_pData->m_String;
            m_pData = StringData::Create(nNewLength);
            if (!m_pData) {
                return 0;
            }
            FXSYS_memcpy(m_pData->m_String, pstr, pOldData->m_nDataLength * sizeof(FX_WCHAR));
            pOldData->Release();
        }
        lpszStart = m_pData->m_String;
        lpszEnd = m_pData->m_String + FX_MAX(m_pData->m_nDataLength, nNewLength);
        {
            while ((lpszTarget = (FX_WCHAR*)FXSYS_wcsstr(lpszStart, lpszOld)) != NULL && lpszStart < lpszEnd) {
                FX_STRSIZE nBalance = nOldLength - (FX_STRSIZE)(lpszTarget - m_pData->m_String + nSourceLen);
                FXSYS_memmove(lpszTarget + nReplacementLen, lpszTarget + nSourceLen, nBalance * sizeof(FX_WCHAR));
                FXSYS_memcpy(lpszTarget, lpszNew, nReplacementLen * sizeof(FX_WCHAR));
                lpszStart = lpszTarget + nReplacementLen;
                lpszStart[nBalance] = 0;
                nOldLength += (nReplacementLen - nSourceLen);
            }
        }
        ASSERT(m_pData->m_String[nNewLength] == 0);
        m_pData->m_nDataLength = nNewLength;
    }
    return nCount;
}
开发者ID:mariospr，项目名称:chromium-browser，代码行数:54，代码来源:fx_basic_wstring.cpp

示例10: length

wxStringImpl& wxStringImpl::append(size_t n, wxStringCharType ch)
{
    size_type len = length();

    if ( !Alloc(len + n) || !CopyBeforeWrite() ) {
      wxFAIL_MSG( wxT("out of memory in wxStringImpl::append") );
      return *this;
    }
    GetStringData()->nDataLength = len + n;
    m_pchData[len + n] = '\0';
    for ( size_t i = 0; i < n; ++i )
        m_pchData[len + i] = ch;
    return *this;
}
开发者ID:erwincoumans，项目名称:wxWidgets，代码行数:14，代码来源:stringimpl.cpp

示例11: GetData

int CString::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(TCHAR));
		GetData()->nDataLength = nNewLength - nCount;
	}

	return nNewLength;
}
开发者ID:ngphloc，项目名称:agmagic，代码行数:17，代码来源:strex.cpp

示例12: wxASSERT

wxStringImpl& wxStringImpl::insert(size_t nPos,
                                   const wxStringCharType *sz, size_t n)
{
    wxASSERT( nPos <= length() );

    if ( n == npos ) n = wxStrlen(sz);
    if ( n == 0 ) return *this;

    if ( !Alloc(length() + n) || !CopyBeforeWrite() ) {
        wxFAIL_MSG( wxT("out of memory in wxStringImpl::insert") );
        return *this;
    }

    memmove(m_pchData + nPos + n, m_pchData + nPos,
            (length() - nPos) * sizeof(wxStringCharType));
    memcpy(m_pchData + nPos, sz, n * sizeof(wxStringCharType));
    GetStringData()->nDataLength = length() + n;
    m_pchData[length()] = '\0';

    return *this;
}
开发者ID:erwincoumans，项目名称:wxWidgets，代码行数:21，代码来源:stringimpl.cpp

示例13: FXSYS_assert

void CFX_WideString::TrimRight(const FX_WCHAR* lpszTargetList) {
  FXSYS_assert(lpszTargetList != NULL);
  if (m_pData == NULL || *lpszTargetList == 0) {
    return;
  }
  CopyBeforeWrite();
  FX_STRSIZE len = GetLength();
  if (len < 1) {
    return;
  }
  FX_STRSIZE pos = len;
  while (pos) {
    if (FXSYS_wcschr(lpszTargetList, m_pData->m_String[pos - 1]) == NULL) {
      break;
    }
    pos--;
  }
  if (pos < len) {
    m_pData->m_String[pos] = 0;
    m_pData->m_nDataLength = pos;
  }
}
开发者ID:hoanganhx86，项目名称:pdfium，代码行数:22，代码来源:fx_basic_wstring.cpp

示例14: FXSYS_assert

void CFX_WideString::TrimLeft(const FX_WCHAR* lpszTargets)
{
    FXSYS_assert(lpszTargets != NULL);
    if (m_pData == NULL || *lpszTargets == 0) {
        return;
    }
    CopyBeforeWrite();
    if (GetLength() < 1) {
        return;
    }
    const FX_WCHAR* lpsz = m_pData->m_String;
    while (*lpsz != 0) {
        if (FXSYS_wcschr(lpszTargets, *lpsz) == NULL) {
            break;
        }
        lpsz ++;
    }
    if (lpsz != m_pData->m_String) {
        int nDataLength = m_pData->m_nDataLength - (FX_STRSIZE)(lpsz - m_pData->m_String);
        FXSYS_memmove(m_pData->m_String, lpsz, (nDataLength + 1)*sizeof(FX_WCHAR));
        m_pData->m_nDataLength = nDataLength;
    }
}
开发者ID:mariospr，项目名称:chromium-browser，代码行数:23，代码来源:fx_basic_wstring.cpp

示例15: CopyBeforeWrite

wxStringImpl::iterator wxStringImpl::begin()
{
    if ( !empty() )
        CopyBeforeWrite();
    return m_pchData;
}
开发者ID:BauerBox，项目名称:wxWidgets，代码行数:6，代码来源:stringimpl.cpp


注：本文中的CopyBeforeWrite函数示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。