Asn1SeekableStream Class Reference
Public Member Functions | |
| Asn1SeekableStream (System.IO.Stream istream, int bufsize) | |
| override void | Close () |
| override void | Flush () |
| override int | Read (byte[] buffer, int offset, int count) |
| override int | ReadByte () |
| override void | SetLength (long len) |
Protected Member Functions | |
| override void | Dispose (bool disposing) |
Properties | |
| override bool | CanRead [get] |
| override bool | CanSeek [get] |
| bool | IsValid [get] |
| override long | Position [get, set] |
Detailed Description
This class is a wrapper that buffers the given input stream, allowing seek operations on streams that normally wouldn't support them. This class is only available inside the ASN.1 runtime.
Constructor & Destructor Documentation
| Asn1SeekableStream | ( | System.IO.Stream | istream, | |
| int | bufsize | |||
| ) |
Creates the seekable stream.
- Parameters:
-
istream The underlying stream. bufsize The size of the capture buffer.
Member Function Documentation
| override void Close | ( | ) |
Closes the underlying stream.
| override void Dispose | ( | bool | disposing | ) | [protected] |
Disposes of the stream.
| override void Flush | ( | ) |
Flushes the underlying stream.
| override int Read | ( | byte[] | buffer, | |
| int | offset, | |||
| int | count | |||
| ) |
This method reads bytes from the underlying input stream, updating the underlying buffer and copying out the bytes into the given buffer.
- Parameters:
-
buffer The byte buffer to receive the read bytes. offset The offset in the buffer to begin writing the read bytes. count The number of bytes to read.
- Returns:
- Number of bytes read from the stream.
| override int ReadByte | ( | ) |
Reads a byte from the underlying stream.
- Returns:
- The byte, cast to an int; -1 if no data was read.
| override void SetLength | ( | long | len | ) |
This will set the length of the underlying stream.
- Parameters:
-
len
Property Documentation
override bool CanRead [get] |
The CanRead property returns true under all circumstances. If the underyling buffer would overflow when reading, we wrap around. The buffer is temporary storage.
override bool CanSeek [get] |
This stream can always seek.
bool IsValid [get] |
Tells whether or not the stream is valid for seeking. When reading from the stream, the amount read may exceed the size of the underlying buffer. The Read will still
override long Position [get, set] |
Returns the current position of the stream. The current position may also be set using this attribute (e.g., for Mark or Reset).