public void Commit( CommitStage c )
{
if ( Saved ) return;
if ( c == CommitStage.Prepare )
{
// Save the pages to the underlying stream.
foreach ( G.KeyValuePair<long,IndexPage> pair in PageMap )
{
IndexPage p = pair.Value;
if ( !p.Saved )
{
p.WriteHeader();
F.Position = (long)p.PageId * IndexPage.PageSize;
// For last page, only write the amount actually used (so file size is minimised)
F.Write( p.Data, 0, p.PageId == PageAlloc-1 ? p.Size() : IndexPage.PageSize );
p.Saved = true;
}
}
}
else if ( c == CommitStage.Rollback )
{
PageMap.Clear();
Initialise();
}
else F.Commit( c );
if ( c >= CommitStage.Flush ) Saved = true;
}
void Save(long id, Value [] row, bool checkNew)
{
DF.Position = (id - 1) * RowSize;
if (row == null) // Delete record
{
for (int i = 0; i < RowSize; i += 1)
{
RB[i] = 0;
}
}
else
{
DataType [] types = Cols.Types;
byte [] sizes = Cols.Sizes;
RB[0] = 1;
int ix = 1;
for (int i = 1; i < types.Length; i += 1)
{
DataType t = types[i];
ulong x = (ulong)row[i].L;
if (t <= DataType.String && x == 0)
{
object o = row[i]._O;
x = (t == DataType.Binary ? (ulong)Db.EncodeBinary((byte[])o) : (ulong)Db.EncodeString((string)o));
row[i].L = (long)x;
}
else if (t == DataType.Float)
{
x = Conv.PackFloat(x);
}
int size = sizes[i];
Util.Set(RB, ix, x, size);
ix += size;
}
}
if (!DF.Write(RB, 0, RowSize, checkNew))
{
throw new System.Exception("Duplicate id, id=" + id + " Table=" + Schema + "." + Name);
}
Dirty = true;
}
void Save(long id, Value [] row, bool checkNew)
{
DataFile.Position = (id - 1) * RowSize;
if (row == null) // Delete record
{
for (int i = 0; i < RowSize; i += 1)
{
RowBuffer[i] = 0;
}
}
else
{
RowBuffer[0] = 1;
int ix = 1;
for (int i = 1; i < CI.Count; i += 1)
{
DataType t = CI.Type[i];
long x = row[i].L;
if (t <= DataType.String && x == 0)
{
x = Database.Encode(row[i]._O, t);
row[i].L = x;
}
else if (t == DataType.Float)
{
x = (long)Conv.PackFloat(x);
}
int size = Size[i];
Util.Set(RowBuffer, ix, x, size);
ix += size;
}
}
if (!DataFile.Write(RowBuffer, 0, RowSize, checkNew))
{
throw new System.Exception("Duplicate id");
}
Dirty = true;
}