public SqlInt64 WriteSizedBlock(SqlBytes bytes, SqlByte sizing, SqlInt64 offset, SqlBoolean insert)
{
if (IsNull || bytes.IsNull)
{
return(SqlInt64.Null);
}
var sizeEncoding = !sizing.IsNull ? (SizeEncoding)sizing.Value : SizeEncoding.NO;
using (var fs = _fi.Open(offset.IsNull ? FileMode.Append : FileMode.OpenOrCreate, FileAccess.Write))
{
if (!offset.IsNull)
{
fs.Position = offset.Value;
}
Int64 position = fs.Position;
if (!offset.IsNull && insert.IsTrue)
{
long size = bytes.Length + PwrBitConverter.GetSizeEncodingSize(bytes.Length, sizeEncoding);
fs.Move(offset.Value, size, SqlRuntime.IoBufferSize);
fs.Position = position;
}
if (sizeEncoding != SizeEncoding.NO)
{
fs.WriteLongSize(bytes.Length, sizeEncoding);
}
fs.WriteSqlBytes(bytes);
fs.Flush();
return(fs.Position - position);
}
}
protected override void WriteItem(int index, T value)
{
int itemSize = FixedItemSize.HasValue ? FixedItemSize.Value : GetItemSize(value);
if (!FixedItemSize.HasValue)
{
long itemOffset = BaseStream.Position;
try
{
int countSize = PwrBitConverter.GetSizeEncodingSize(int.MaxValue, CountSizing);
long allocOffset = BaseStream.Position = HeaderOffset + countSize + AllocItemSize * index;
int allocSize = PwrBitConverter.GetSizeEncodingSize(int.MaxValue, ItemSizing);
BaseStream.WriteSize(itemSize, ItemSizing, Endian);
int rest = allocSize - (int)(BaseStream.Position - allocOffset);
if (rest > 0)
{
BaseStream.WriteCollection(Enumerable.Repeat((byte)0, rest), (s, t) => s.WriteUByte(t));
}
}
finally
{
BaseStream.Position = itemOffset;
}
}
WriteItemData(value, itemSize);
}
protected override int GetItemSize(T value)
{
if (FixedItemSize.HasValue)
{
return(FixedItemSize.Value);
}
int itemSize = GetDataSize(value);
return(itemSize + PwrBitConverter.GetSizeEncodingSize(itemSize, ItemSizing));
}
protected override int GetItemSize(T value)
{
F flag = GetItemFlag(value);
bool hasValue = HasItemData(flag);
int size = FixedDataSize.HasValue && (hasValue || !Compact) ? FixedDataSize.Value : !FixedDataSize.HasValue && hasValue?GetDataSize(value) : 0;
if (!FixedDataSize.HasValue && hasValue)
{
size += PwrBitConverter.GetSizeEncodingSize(size, ItemSizing);
}
return(size + (FixedFlagSize.HasValue ? FixedFlagSize.Value : GetFlagSize(flag)));
}
protected override void WriteCount(int count)
{
int countSize = PwrBitConverter.GetSizeEncodingSize(int.MaxValue, CountSizing);
long countOffset = BaseStream.Position = HeaderOffset;
BaseStream.WriteSize(count, CountSizing, Endian);
int rest = countSize - (int)(BaseStream.Position - countOffset);
if (rest > 0)
{
BaseStream.WriteCollection(Enumerable.Repeat((byte)0, rest), (s, v) => s.WriteUByte(v));
}
}
protected override int ReadCount()
{
int countSize = PwrBitConverter.GetSizeEncodingSize(int.MaxValue, CountSizing);
long countOffset = BaseStream.Position = HeaderOffset;
int count = BaseStream.ReadSize(CountSizing, Endian);
int rest = countSize - (int)(BaseStream.Position - countOffset);
if (rest > 0)
{
BaseStream.Position += rest;
}
return(count);
}
protected override T ReadItem(int index)
{
int itemSize = FixedItemSize.HasValue ? FixedItemSize.Value : 0;
if (!FixedItemSize.HasValue)
{
long itemOffset = BaseStream.Position;
try
{
int countSize = PwrBitConverter.GetSizeEncodingSize(int.MaxValue, CountSizing);
BaseStream.Position = HeaderOffset + countSize + AllocItemSize * index;
itemSize = BaseStream.ReadSize(ItemSizing, Endian);
}
finally
{
BaseStream.Position = itemOffset;
}
}
return(ReadItemData(itemSize));
}
protected virtual long GetAllocOffset(int index)
{
return(HeaderOffset + AllocItemSize * index + PwrBitConverter.GetSizeEncodingSize(int.MaxValue, CountSizing));
}