public static unsafe void ReadBytes(this BinaryReader reader, void *destination, long destinationSizeInBytes, long bytesToRead, ref byte[] work)
{
Contracts.AssertValue(reader);
Contracts.Assert(bytesToRead >= 0);
Contracts.Assert(destinationSizeInBytes >= bytesToRead);
Contracts.Assert(destination != null);
Contracts.AssertValueOrNull(work);
// Size our read buffer to 70KB to stay off the LOH.
const int blockSize = 70 * 1024;
int desiredWorkSize = (int)Math.Min(blockSize, bytesToRead);
EnsureSize(ref work, desiredWorkSize);
fixed(void *src = work)
{
long offset = 0;
while (offset < bytesToRead)
{
int toRead = (int)Math.Min(bytesToRead - offset, blockSize);
int read = reader.Read(work, 0, toRead);
Contracts.CheckDecode(read == toRead);
MemUtils.MemoryCopy(src, (byte *)destination + offset, destinationSizeInBytes - offset, read);
offset += read;
}
Contracts.Assert(offset == bytesToRead);
}
}
