// Find COpcBrowseElement* COpcBrowseElement::Find(const COpcString& cPath) { // remove leading separator - if it exists. COpcString cPrefix = GetSeparator(); COpcString cLocalPath = cPath; while (cLocalPath.Find(GetSeparator()) == 0) { cLocalPath = cLocalPath.SubStr(cPrefix.GetLength()); } // recursively search children. OPC_POS pos = m_cChildren.GetHeadPosition(); while (pos != NULL) { COpcBrowseElement* pChild = m_cChildren.GetNext(pos); // check for a child with an exact name match. if (cLocalPath == pChild->m_cName) { return pChild; } // check if the path starts with the child name. COpcString cPrefix = pChild->m_cName + pChild->GetSeparator(); // check for a child with an exact name match plus trailing separator. if (cLocalPath == cPrefix) { return pChild; } UINT uIndex = cLocalPath.Find(cPrefix); // search the child node if there is a match. if (uIndex == 0) { cLocalPath = cLocalPath.SubStr(cPrefix.GetLength()); return pChild->Find(cLocalPath); } } return NULL; }
// ToTime static bool ToTime( const COpcString& cString, WORD& wHour, WORD& wMinute, WORD& wSeconds, WORD& wFraction ) { bool bResult = true; TRY { COpcText cText; COpcTextReader cReader(cString); ULong uValue = 0; // parse hour field. cText.SetType(COpcText::Delimited); cText.SetDelims(L":"); if (!cReader.GetNext(cText)) THROW_(bResult, false); if (!ToUnsigned(cText, uValue, MAX_HOUR, MIN_HOUR, 10)) THROW_(bResult, false); wHour = (WORD)uValue; // parse month field. cText.SetType(COpcText::Delimited); cText.SetDelims(L":"); if (!cReader.GetNext(cText)) THROW_(bResult, false); if (!ToUnsigned(cText, uValue, MAX_MINUTE, MIN_MINUTE, 10)) THROW_(bResult, false); wMinute = (WORD)uValue; // parse seconds field. cText.SetType(COpcText::Delimited); cText.SetDelims(L"."); cText.SetEofDelim(); if (!cReader.GetNext(cText)) THROW_(bResult, false); if (!ToUnsigned(cText, uValue, MAX_SECOND, MIN_SECOND, 10)) THROW_(bResult, false); wSeconds = (WORD)uValue; // parse seconds fraction field. wFraction = 0; if (cText.GetDelimChar() == L'.') { cText.SetType(COpcText::Delimited); cText.SetEofDelim(); if (!cReader.GetNext(cText)) THROW_(bResult, false); // preprocess text. COpcString cFraction = cText; // add trailing zeros. while (cFraction.GetLength() < 3) cFraction += _T("0"); // truncate extra digits. if (cFraction.GetLength() > 3) cFraction = cFraction.SubStr(0,3); if (!ToUnsigned(cFraction, uValue, MAX_ULONG, 0, 10)) { THROW_(bResult, false); } // result is in milliseconds. wFraction = (WORD)uValue; } } CATCH { wHour = 0; wMinute = 0; wSeconds = 0; wFraction = 0; } return bResult; }
// Insert COpcBrowseElement* COpcBrowseElement::Insert(const COpcString& cPath) { COpcString cName = cPath; COpcString cSubPath = OPC_EMPTY_STRING; // check if multiple levels have been specified. do { UINT uIndex = cName.Find(GetSeparator()); if (uIndex == -1) { break; } cSubPath = cName.SubStr(uIndex + GetSeparator().GetLength()); cName = cName.SubStr(0, uIndex); if (!cName.IsEmpty()) { break; } cName = cSubPath; } while (!cSubPath.IsEmpty()); // invalid path specified. if (cName.IsEmpty()) { return NULL; } // find out if node already exists. COpcBrowseElement* pNode = NULL; OPC_POS pos = m_cChildren.GetHeadPosition(); while (pos != NULL) { pNode = m_cChildren.GetNext(pos); if (pNode->m_cName == cName) { // return existing node. if (cSubPath.IsEmpty()) { return pNode; } // insert sub-path into existing node. return pNode->Insert(cSubPath); } } // create new node. pNode = CreateInstance(); pNode->m_cName = cName; OPC_ASSERT(!pNode->m_cName.IsEmpty()); COpcBrowseElement* pChild = pNode; if (!cSubPath.IsEmpty()) { pChild = pNode->Insert(cSubPath); if (pChild == NULL) { delete pNode; return NULL; } } m_cChildren.AddTail(pNode); return pChild; }