internal NdxPage InternalGetPage(NdxPage parentPage, UInt32 recordNo, bool returnNullIfNotInCache)
{
NdxPage record = (NdxPage)base.InternalGetRecord(recordNo, returnNullIfNotInCache);
if (record != null)
{
record.ParentPage = parentPage;
}
return record;
}
internal void Dump(string indent, NdxPage parentPage, NdxEntry parentEntry, bool withChildren, ref NdxEntry lastLeaf)
{
var ndxFile = (NdxFile)mHolder.mFile;
System.Diagnostics.Debug.WriteLine(indent
+ "Page #" + mHolder.RecordNo
+" " + this.EntriesCount + " entries (parent: " + (ParentPage == null ? "none" : "#" + ParentPage.RecordNo)+")");
System.Diagnostics.Debug.Assert(parentPage == ParentPage, "Invalid NDX Parent page");
for (int i = 0; i < EntriesCount; i++)
{
var e = GetEntry(i);
System.Diagnostics.Debug.WriteLine(
indent + " "
+ "Entry " + i + " (page #" + mHolder.RecordNo + ") - "
+ " SubPage: " + (e.LowerPageRecordNo == UInt32.MaxValue ? "none" : "#" + e.LowerPageRecordNo)
+ ", Key: " + e.Fields.ToString()
+ " #" + e.DbfRecordNo
);
if (e.mNdxNativeLowerPageNo != 0)
{
NdxPage subPage = (NdxPage)ndxFile.InternalGetPage(this, (uint)e.LowerPageRecordNo,
/*returnNullIfNotInCache*/ false);
if (withChildren)
{
subPage.Dump(indent + " ", this, e, true, ref lastLeaf);
}
}
else
{
#if DEBUG
if (lastLeaf != null)
{
int[] cmpArray = new int[ndxFile.mSortFieldsCount];
int cmp = e.ChainCompare(cmpArray, ndxFile, lastLeaf);
if (cmp <= 0) System.Diagnostics.Trace.WriteLine("*** ERRROR HERE THE ORDER IS MESSED UP ***");
}
lastLeaf = e;
#endif
}
}
}
private void SplitPage()
{
#if DUMP_INSERTS
System.Diagnostics.Trace.WriteLine("Split page #" + this.RecordNo);
#endif
var ndxFile = (NdxFile)mHolder.mFile;
// split needed (on save)
int mid = EntriesCount / 2;
if (ParentPage == null)
{
ParentPage = (NdxPage)ndxFile.NewPage(null);
var rootEntry = new NdxEntry();
var lastEntry = GetEntry(EntriesCount - 1);
rootEntry.DbfRecordNo = lastEntry.DbfRecordNo;
rootEntry.Fields = lastEntry.Fields.Clone();
rootEntry.LowerPageRecordNo = this.RecordNo;
ParentPage.EntriesClear();
ParentPage.EntriesInsert(0,rootEntry);
ndxFile.mNdxHeader.StartingPageRecordNo = ParentPage.RecordNo;
//ParentPage.mNbChildEntries = mNbChildEntries;
ParentPage.mIsModified = true;
#if DUMP_INSERTS
System.Diagnostics.Trace.WriteLine(" Create new parent page #" + mParentPage.RecordNo);
mParentPage.Dump(" ");
#endif
}
var newPage = (NdxPage)ndxFile.NewPage(ParentPage);
newPage.EntriesClear();
newPage.mIsModified = true;
newPage.ParentPage = ParentPage;
for (int i = 0; i < mid; i++)
{
//mNbChildEntries = mNbChildEntries;
newPage.EntriesInsert(i, GetEntry(i));
var lowerPageRecordNo = GetEntry(i).LowerPageRecordNo;
if (lowerPageRecordNo != UInt32.MaxValue)
{
var ndxPage2 = ndxFile.InternalGetPage(
ParentPage,
lowerPageRecordNo,
/* returnNullIfNotInCache */ true) as NdxPage;
if (ndxPage2 != null)
{
ndxPage2.ParentPage = newPage;
}
}
}
EntriesRemoveRange(0, mid);
var midEntry = newPage.GetEntry(mid - 1);
var newMidEntry = new NdxEntry() {
DbfRecordNo = midEntry.DbfRecordNo,
LowerPageRecordNo = newPage.RecordNo,
Fields = midEntry.Fields.Clone() };
#if DUMP_INSERTS
System.Diagnostics.Trace.WriteLine(" newPage #" + newPage.RecordNo);
newPage.Dump(" ");
System.Diagnostics.Trace.WriteLine(" this page #" + RecordNo);
Dump(" ");
#endif
int midEntryPos = ParentPage.FindInsertPos(newMidEntry, ndxFile);
ParentPage.InsertInThisPage(newMidEntry, midEntryPos);
}
public NdxPage NewPage(NdxPage parentPage)
{
NdxPage record = (NdxPage)base.NewRecord();
record.ParentPage = parentPage;
return record;
}
