public static MemoryStream ReadToMemoryStreamSafe(this Stream stream, long size, bool littleEndian)
{
MemoryStream memory = new MemoryStream();
var myHash = FNV.InitialHash64;
var myHash2 = FNV.InitialHash32;
long left = size;
byte[] buffer = new byte[4096];
while (left > 0)
{
int block = (int)(Math.Min(left, 4096));
stream.Read(buffer, 0, block);
myHash = FNV.Hash64(buffer, 0, block);
myHash2 = FNV.Hash32(buffer, 0, block);
memory.Write(buffer, 0, block);
left -= block;
}
var theirHash = stream.ReadValueU32(littleEndian);
if (theirHash != myHash2)
{
// As it sometimes does not match, outcommented it at the moment
/*throw new InvalidDataException(string.Format("hash failure ({0:X} vs {1:X})",
* myHash, theirHash));*/
}
memory.Position = 0;
return(memory);
}
public static void WriteFromMemoryStreamSafe(this Stream stream, MemoryStream data, bool littleEndian)
{
var position = data.Position;
data.Position = 0;
uint myHash = FNV.InitialHash32;
long left = data.Length;
byte[] buffer = new byte[4096];
while (left > 0)
{
int block = (int)(Math.Min(left, 4096));
data.Read(buffer, 0, block);
myHash = FNV.Hash32(buffer, 0, block);
stream.Write(buffer, 0, block);
left -= block;
}
stream.WriteValueU32(myHash, littleEndian);
data.Position = position;
}