// from bytes
public override void Unpack(byte[] data, int startIndex)
{
uint tmpUInt;
VarintType type;
// remaining size
int startOffsetOfRemainingSize = 0;
(tmpUInt, type) = VarintBitConverter.FromVarint(data, startIndex + startOffsetOfRemainingSize);
// header size
int startOffsetOfHeaderSize = startOffsetOfRemainingSize + VarintSize.GetVarintSize(tmpUInt);
(tmpUInt, type) = VarintBitConverter.FromVarint(data, startIndex + startOffsetOfHeaderSize);
// key-idx size
int startOffsetOfKeyIdxSize = startOffsetOfHeaderSize + VarintSize.GetVarintSize(tmpUInt);
(tmpUInt, type) = VarintBitConverter.FromVarint(data, startIndex + startOffsetOfKeyIdxSize);
// key-pk size
int startOffsetOfKeyPKSize = startOffsetOfKeyIdxSize + VarintSize.GetVarintSize(tmpUInt);
(tmpUInt, type) = VarintBitConverter.FromVarint(data, startIndex + startOffsetOfKeyPKSize);
// key-idx
int startOffsetOfKeyIdx = startOffsetOfKeyPKSize + VarintSize.GetVarintSize(tmpUInt);
this.Key = new DBRecord(data, startOffsetOfKeyIdx + startIndex);
// key-pk
int startOffsetOfKeyPK = startOffsetOfKeyIdx + this.Key.RecordSize;
this.PrimaryKey = new DBRecord(data, startOffsetOfKeyPK + startIndex);
}
// from raw data to this object
public void Unpack(byte[] data, int startIndex)
{
InitializeEmpty();
// first byte
this.HeaderSize = data[startIndex];
// header
int headerOffset = 1;
while (headerOffset < this.HeaderSize)
{
uint value;
VarintType varintType;
(value, varintType) = VarintBitConverter.FromVarint(data, headerOffset + startIndex);
this.HeaderList.Add(value);
if (varintType == VarintType.Varint32)
{
// string
headerOffset += 4;
}
else
{
headerOffset += 1;
}
}
int fieldStartIndex = headerOffset + startIndex;
// field
int fieldOffset = 0;
foreach (int headerValue in this.HeaderList)
{
this.FieldOffsets.Add(fieldOffset);
if (headerValue == (int)HeaderValue.INTEGER)
{
fieldOffset += 4;
}
else if (headerValue == (int)HeaderValue.FloatingPoint)
{
fieldOffset += 8;
}
else if (headerValue == (int)HeaderValue.NULL)
{
fieldOffset += 0;
}
else if ((headerValue - (int)HeaderValue.TEXT) % 2 == 0)
{
int stringLength = (headerValue - (int)HeaderValue.TEXT) / 2;
fieldOffset += stringLength;
}
else
{
throw new Exception($"Header value {headerValue} does not exists");
}
}
int fieldLength = fieldOffset;
this.FieldData = data.Skip(fieldStartIndex).Take(fieldLength).ToArray();
}
