//public byte[] ToBuffer()
//{
// byte[] result = new byte[Length]; //не забути про доповнення кратне 16
// byte[] trash = new byte[13];
// CryptoRandom.GetBytes(trash);
// Buffer.BlockCopy(_IV, 0, result, 0, _IV.Length);
// byte BlockStatus = (byte)(Convert.ToByte(!Exists) * 128 + (int)CryptoRandom.Random(128));
// Buffer.BlockCopy(BitConverter.GetBytes(BlockStatus), 0, result, 16, 1);
// Buffer.BlockCopy(trash, 0, result, 17, trash.Length);
// Buffer.BlockCopy(BitConverter.GetBytes(_InfSize), 0, result, 30, 2);
// Buffer.BlockCopy(BitConverter.GetBytes((byte)ElType * 128 + (int)CryptoRandom.Random(128)), 0, result, 32, 1);
// return result;
//}
//Перші 17 байт (нешифровані)
public byte[] ToBufferFirstBlock()
{
byte[] result = new byte[17];
Buffer.BlockCopy(_IV, 0, result, 0, _IV.Length);
result[16] = (byte)(Convert.ToByte(!Exists) * 128 + (int)CryptoRandom.Random(128));
return(result);
}
public byte[] ToBufferEncryptBlock()
{
byte[] result = new byte[16];
CryptoRandom.GetBytes(result);
Buffer.BlockCopy(BitConverter.GetBytes(_InfSize), 0, result, 13, 2);
Buffer.BlockCopy(BitConverter.GetBytes((byte)ElType * 128 + (int)CryptoRandom.Random(128)), 0, result, 15, 1);
return(result);
}
public ulong GetFreeSpacePos(UInt64 size, long fileSize, bool withWrite = true)
{
lock (_freeSpaceMapLocker)
{
if (size == 0)
{
return(CryptoRandom.Random(UInt64.MaxValue - 2) + 2);
}
if (!_realTimeCalculating && !_isAnalysed)
{
throw new Exception("Не було проведено аналіз вільного місця. Використай метод FreeSpaceAnalyse()");
}
UInt64 result = (ulong)fileSize;
int indexBySize = _GetIndexBySize(size);
if (indexBySize < 0)
{
return(result);
}
SPoint sPoint = _freeSpaceMapSize[indexBySize];
result = sPoint.Start;
if (!withWrite)
{
return(result);
}
_freeSpaceMapSize.RemoveAt(indexBySize);
if ((sPoint.Size - size) == 0)
{
int indexByPos = _GetIndexByPos(sPoint.Start);
_freeSpaceMapPos.RemoveAt(indexByPos);
return(result);
}
sPoint.Start += size;
sPoint.Size -= size;
_InsertSPointToSizeMap(sPoint);
return(result);
}
}
protected override void SaveInf()
{
byte[] UTF8Name = Encoding.UTF8.GetBytes(_Name);
int realLength = FileInfLength + UTF8Name.Length;
ushort newInfSize = Header.GetNewInfSizeByBufLength(realLength);
byte[] buf = new byte[newInfSize];
Buffer.BlockCopy(BitConverter.GetBytes(_FileStartPos), 0, buf, 0, 8);
Buffer.BlockCopy(BitConverter.GetBytes(_IconStartPos), 0, buf, 8, 8);
Buffer.BlockCopy(BitConverter.GetBytes(_FileSize), 0, buf, 16, 8);
Buffer.BlockCopy(BitConverter.GetBytes(_IconSize), 0, buf, 24, 4);
byte isCompressed = (byte)(Convert.ToByte(!_IsCompressed) * 128 + (int)CryptoRandom.Random(128));
Buffer.BlockCopy(BitConverter.GetBytes(isCompressed), 0, buf, 28, 1);
Buffer.BlockCopy(_Hash, 0, buf, 29, 16);
Buffer.BlockCopy(_PHash, 0, buf, 45, 8);
Buffer.BlockCopy(BitConverter.GetBytes(_ParentID), 0, buf, 53, 8);
Buffer.BlockCopy(BitConverter.GetBytes((UInt16)UTF8Name.Length), 0, buf, 61, 2);
Buffer.BlockCopy(UTF8Name, 0, buf, 63, UTF8Name.Length);
header.SaveInfo(buf, realLength);
}
protected UInt64 GenID()
{
return(CryptoRandom.Random(UInt64.MaxValue - 2) + 2);
}
public void Restore()
{
_Exists = true;
if (writedInFile)
{
_headersFileStream.WriteByte((long)_StartPos + 16, (byte)(Convert.ToByte(!_Exists) * 128 + (int)CryptoRandom.Random(128)));
}
}