protected virtual void SetRecord(int x, ref IndexFileRecord r)
{
int off = NodeOverhead + NodeBase + x * NodeSize;
for (int i = 0; i < ColStore; i += 1)
{
long v = r.Col[i].L;
DataType t = Inf.Types[i];
if (t == DataType.String && v == 0)
{
r.Col[i].L = Database.EncodeString((string)r.Col[i]._O);
}
else if (t == DataType.Binary && v == 0)
{
r.Col[i].L = Database.EncodeBinary((byte[])r.Col[i]._O);
}
int size = DTI.Size(t);
ulong p = (ulong)r.Col[i].L;
if (t == DataType.Float)
{
p = Conv.PackFloat(p);
}
Set(off, p, size);
off += size;
}
}
public int KeySize()
{
int result = 0;
for ( int i = 0; i < KeyCount; i += 1 )
result += DTI.Size( Types[ i ] );
return result;
}
// end Alter section
int CalcRowSize(ColInfo c)
{
int result = 1; // Flag byte that indicates whether row is deleted.
for (int i = 1; i < c.Count; i += 1)
{
result += DTI.Size(c.Type[i]);
}
return(result);
}
public ColInfo(string [] names, DataType[] types)
{
Names = names;
Types = types;
Count = Types.Length;
Sizes = new byte[Count];
for (int i = 0; i < Count; i += 1)
{
Sizes[i] = (byte)DTI.Size(Types[i]);
}
}
bool AlterRead(DataType [] types, long [] row)
{
int ix; byte [] RowBuffer = DataFile.FastRead(RowSize, out ix);
if (RowBuffer[ix++] == 0)
{
return(false); // Row has been deleted
}
for (int i = 1; i < types.Length; i += 1)
{
DataType t = types[i];
int size = DTI.Size(t);
long x = Util.Get(RowBuffer, ix, size, t);
ix += size;
row[i] = x;
}
return(true);
}
void AlterWrite(DataType [] types, long [] row, int newRowSize)
{
RowBuffer[0] = 1;
int ix = 1;
for (int i = 1; i < types.Length; i += 1)
{
DataType t = types[i];
long x = row[i];
if (t == DataType.Float)
{
x = Conv.PackFloat(x);
}
int size = DTI.Size(t);
Util.Set(RowBuffer, ix, x, size);
ix += size;
}
DataFile.Write(RowBuffer, 0, newRowSize, false);
}
protected virtual void GetRecord(int x, ref IndexFileRecord r)
{
if (r.Col == null)
{
r.Col = new Value[ColStore];
}
int off = NodeOverhead + NodeBase + x * NodeSize;
for (int i = 0; i < ColStore; i += 1)
{
DataType t = Inf.Types[i];
int size = DTI.Size(t);
ulong u = Get(off, size);
off += size;
if (t == DataType.Float)
{
u = Conv.UnpackFloat((uint)u);
}
else if (t == DataType.Int)
{
u = (ulong)(long)(int)(uint)u;
}
else if (t == DataType.Smallint)
{
u = (ulong)(long)(short)(ushort)u;
}
else if (t == DataType.Tinyint)
{
u = (ulong)(long)(sbyte)(byte)u;
}
r.Col[i].L = (long)u;
if (t == DataType.String)
{
r.Col[i]._O = Database.DecodeString((long)u);
}
else if (t == DataType.Binary)
{
r.Col[i]._O = Database.DecodeBinary((long)u);
}
}
}
protected virtual void GetRecord(int x, ref IndexFileRecord r)
{
if (r.Col == null)
{
r.Col = new Value[ColStore];
}
int off = NodeOverhead + NodeBase + x * NodeSize;
for (int i = 0; i < ColStore; i += 1)
{
DataType t = Inf.Types[i];
int size = DTI.Size(t);
long v = Util.Get(Data, off, size, t);
off += size;
r.Col[i].L = v;
if (t <= DataType.String)
{
r.Col[i]._O = Database.Decode(v, t);
}
}
}
void InitColumnInfo(ColInfo ci)
{
CI = ci;
int count = ci.Count;
AllCols = Util.OneToN(count - 1);
Size = new byte[count];
Offset = new int[count];
int offset = -8; // -8 to allow for the Id column not being stored.
for (int i = 0; i < count; i += 1)
{
Size[i] = (byte)DTI.Size(CI.Type[i]);
Offset[i] = offset;
offset += Size[i];
}
RowSize = 1 + offset; // +1 is for byte that indicates whether row exists.
RowCount = DataFile.Length / RowSize;
RowBuffer = new byte[RowSize];
}
protected virtual void SetRecord(int x, ref IndexFileRecord r)
{
int off = NodeOverhead + NodeBase + x * NodeSize;
for (int i = 0; i < ColStore; i += 1)
{
DataType t = Inf.Types[i];
if (t <= DataType.String && r.Col[i].L == 0)
{
r.Col[i].L = Database.Encode(r.Col[i]._O, t);
}
int size = DTI.Size(t);
long p = r.Col[i].L;
if (t == DataType.Float)
{
p = Conv.PackFloat(p);
}
Set(off, (ulong)p, size);
off += size;
}
}
