示例#1
0
/*
 * @implemented
 */
CHString CHString::Mid(int nFirst, int nCount) const throw (CHeap_Exception)
{
    CHString NewString;

    // Validate sizes first
    if (nFirst < 0)
    {
        nFirst = 0;
    }

    if (nCount < 0)
    {
        nCount = 0;
    }

    // Ensure we don't go beyond the string
    if (nFirst + nCount > GetData()->nDataLength)
    {
        nCount = GetData()->nDataLength - nFirst;
    }

    // Also ensure we don't read beyond
    // Yes, this should have been done before previous check
    // MS does it that way
    if (nFirst > GetData()->nDataLength)
    {
        nCount = 0;
    }

    AllocCopy(NewString, nCount, nFirst, 0);

    return NewString;
}
示例#2
0
CStrClass CStrClass::Left(int nCount) const
{

	if (nCount > m_nDataLength)
		nCount = m_nDataLength;

	CStrClass dest;
	AllocCopy(dest, nCount, 0, 0);
	return dest;
}
示例#3
0
文件: strex.cpp 项目: ngphloc/agmagic
CString CString::Left(int nCount) const
{
	if (nCount < 0)
		nCount = 0;
	if (nCount >= GetData()->nDataLength)
		return *this;

	CString dest;
	AllocCopy(dest, nCount, 0, 0);
	return dest;
}
示例#4
0
CStrClass CStrClass::Mid(int nFirst, int nCount) const
{
	// out-of-bounds requests return sensible things
	if (nFirst + nCount > m_nDataLength)
		nCount = m_nDataLength - nFirst;
	if (nFirst > m_nDataLength)
		nCount = 0;

	CStrClass dest;
	AllocCopy(dest, nCount, nFirst, 0);
	return dest;
}
示例#5
0
CFX_WideString CFX_WideString::Right(FX_STRSIZE nCount) const {
  if (m_pData == NULL) {
    return CFX_WideString();
  }
  if (nCount < 0) {
    nCount = 0;
  }
  if (nCount >= m_pData->m_nDataLength) {
    return *this;
  }
  CFX_WideString dest;
  AllocCopy(dest, nCount, m_pData->m_nDataLength - nCount);
  return dest;
}
示例#6
0
CFX_ByteString CFX_ByteString::Mid(FX_STRSIZE nFirst, FX_STRSIZE nCount) const {
  if (!m_pData)
    return CFX_ByteString();

  nFirst = std::min(std::max(nFirst, 0), m_pData->m_nDataLength);
  nCount = std::min(std::max(nCount, 0), m_pData->m_nDataLength - nFirst);
  if (nCount == 0)
    return CFX_ByteString();

  if (nFirst == 0 && nCount == m_pData->m_nDataLength)
    return *this;

  CFX_ByteString dest;
  AllocCopy(dest, nCount, nFirst);
  return dest;
}
示例#7
0
/*
 * @implemented
 */
CHString CHString::Left(int nCount) const throw (CHeap_Exception)
{
    CHString NewString;

    // Validate input (we can't get more than what we have ;-))
    if (nCount)
    {
        if (nCount > GetData()->nDataLength)
        {
            nCount = GetData()->nDataLength;
        }
    }

    AllocCopy(NewString, nCount, 0, 0);

    return NewString;
}
示例#8
0
CFX_WideString CFX_WideString::Mid(FX_STRSIZE nFirst, FX_STRSIZE nCount) const {
  if (m_pData == NULL) {
    return CFX_WideString();
  }
  if (nFirst < 0) {
    nFirst = 0;
  }
  if (nCount < 0) {
    nCount = 0;
  }
  if (nFirst + nCount > m_pData->m_nDataLength) {
    nCount = m_pData->m_nDataLength - nFirst;
  }
  if (nFirst > m_pData->m_nDataLength) {
    nCount = 0;
  }
  if (nFirst == 0 && nFirst + nCount == m_pData->m_nDataLength) {
    return *this;
  }
  CFX_WideString dest;
  AllocCopy(dest, nCount, nFirst);
  return dest;
}
示例#9
0
文件: strex.cpp 项目: ngphloc/agmagic
CString CString::Mid(int nFirst, int nCount) const
{
	// out-of-bounds requests return sensible things
	if (nFirst < 0)
		nFirst = 0;
	if (nCount < 0)
		nCount = 0;

	if (nFirst + nCount > GetData()->nDataLength)
		nCount = GetData()->nDataLength - nFirst;
	if (nFirst > GetData()->nDataLength)
		nCount = 0;

	ASSERT(nFirst >= 0);
	ASSERT(nFirst + nCount <= GetData()->nDataLength);

	// optimize case of returning entire string
	if (nFirst == 0 && nFirst + nCount == GetData()->nDataLength)
		return *this;

	CString dest;
	AllocCopy(dest, nCount, nFirst, 0);
	return dest;
}