Method OpenImpl

src/db/hierdatabase.cpp:150–194

////////////////////////////////////////////////////////////////////////// OpenImpl //////////////////////////////////////////////////////////////////////////

// OpenImpl
///////////////////////////////////////////////////////////////////////////////
void cHierDatabase::OpenImpl(bool bTruncate) //throw (eArchive, eHierDatabase)
{
    // now, we should write the root node at (0,0) if we are creating, and assert that the root node
    // is there if we are opening an existing one...
    //
    if (bTruncate)
    {
        //
        // make the root node that we are creating...
        //
        cHierRoot rootNode;
        rootNode.mChild          = cHierAddr(0, 1); // the first array will be placed at (0,1)
        rootNode.mbCaseSensitive = mbCaseSensitive;
        rootNode.mDelimitingChar = mDelimitingChar;
        cHierAddr addr           = util_WriteObject(this, &rootNode);
        //
        // assert that it was written to (0, 0)
        //
        ASSERT((addr.mBlockNum == 0) && (addr.mIndex == 0));
        //
        // make an empty array to serve as the root array.
        //
        cHierArrayInfo arrayInfo;
        arrayInfo.mParent = cHierAddr();
        arrayInfo.mArray  = cHierAddr();
        //
        // actually write the objects and assert that they were written to the right places.
        //
        addr = util_WriteObject(this, &arrayInfo);
        ASSERT((addr.mBlockNum == 0) && (addr.mIndex == 1));

        mRootArrayAddr = cHierAddr(0, 1);
    }
    else
    {
        cHierRoot rootNode;
        util_ReadObject(this, &rootNode, cHierAddr(0, 0));
        //
        // set the location of the top-level array and the other root parameters...
        //
        mRootArrayAddr  = rootNode.mChild;
        mbCaseSensitive = rootNode.mbCaseSensitive;
        mDelimitingChar = rootNode.mDelimitingChar;
    }
}

//-----------------------------------------------------------------------------
// cHierDatabaseIter