public S3ResourceStream(S3StoreInfo store, string bucketName, string physicalPath)
{
fFile = new S3ResourceFile(store, bucketName, physicalPath);
fCursor = 0;
// start with an empty buffer
fBuffer = fFile.GetBufferWithRetry(0, BufferBytes);
}
public override int Read(byte[] buffer, int offset, int count)
{
int totalBytesRead = 0;
// how many bytes will we read?
int bytesToRead = Math.Min(count, (int)Math.Min(Int32.MaxValue, fFile.TotalBytes - fCursor));
do
{
// attempt to read from the current buffer?
int bytesRead = fBuffer.ReadAt(fCursor, buffer, offset, bytesToRead);
// adjust pointers
bytesToRead -= bytesRead;
fCursor += bytesRead;
offset += bytesRead;
totalBytesRead += bytesRead;
// do we need to refill the buffer?
if (bytesToRead > 0 && (bytesRead == 0 || fCursor >= fBuffer.Offset + fBuffer.ValidBufferBytes))
{
fBuffer = fFile.GetBufferWithRetry(fCursor, BufferBytes);
}
} while (bytesToRead > 0);
return(totalBytesRead);
}
