Method DeleteEntry

src/db/hierdatabase.cpp:636–677

////////////////////////////////////////////////////////////////////////// DeleteEntry //////////////////////////////////////////////////////////////////////////

// DeleteEntry
///////////////////////////////////////////////////////////////////////////////
void cHierDatabaseIter::DeleteEntry() //throw (eArchive, eHierDatabase)
{
    ASSERT(!Done());
    ASSERT(!CanDescend()); // this node can't have any children.
    cDebug d("cHierDatabaseIter::DeleteEntry");

    if (Done())
    {
        d.TraceDetail("Attempt to DeleteEntry() when Done() == true; returning\n");
        return;
    }
    if (CanDescend())
    {
        throw eHierDatabase(_T("Attempt to delete an entry that still has children.\n"));
    }

    //
    // first, we should set the previous node's next pointer...
    //
    cHierAddr curAddr = GetCurrentAddr();
    if (mIter == mEntries.begin())
    {
        // we are changing the info's mArray pointer
        //
        mInfo.mArray = mIter->mNext;
        util_RewriteObject(mpDb, &mInfo, mInfoAddr);
    }
    else
    {
        // altering the previous node...
        //
        --mIter;
        mIter->mNext = (mIter + 1)->mNext;
        util_RewriteObject(mpDb, &(*mIter), GetCurrentAddr());
        ++mIter;
    }
    //
    // now, delete the node from the file and from our array...
    //
    mpDb->RemoveItem(cBlockRecordFile::tAddr(curAddr.mBlockNum, curAddr.mIndex));
    mIter = mEntries.erase(mIter);
}

///////////////////////////////////////////////////////////////////////////////
// CanDeleteChildArray