/// <summary>
/// Reads a sequence of bytes from the stream and advances the position
/// within the stream by the number of bytes read.
/// </summary>
/// <remarks>
/// Reads a sequence of bytes from the stream and advances the position
/// within the stream by the number of bytes read.
/// </remarks>
/// <returns>The total number of bytes read into the buffer. This can be less than the number of bytes requested if that many
/// bytes are not currently available, or zero (0) if the end of the stream has been reached.</returns>
/// <param name="buffer">The buffer to read data into.</param>
/// <param name="offset">The offset into the buffer to start reading data.</param>
/// <param name="count">The number of bytes to read.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="buffer"/> is <c>null</c>.
/// </exception>
/// <exception cref="System.ArgumentOutOfRangeException">
/// <para><paramref name="offset"/> is less than zero or greater than the length of <paramref name="buffer"/>.</para>
/// <para>-or-</para>
/// <para>The <paramref name="buffer"/> is not large enough to contain <paramref name="count"/> bytes starting
/// at the specified <paramref name="offset"/>.</para>
/// </exception>
/// <exception cref="System.ObjectDisposedException">
/// The stream has been disposed.
/// </exception>
/// <exception cref="System.IO.IOException">
/// An I/O error occurred.
/// </exception>
public override int Read(byte[] buffer, int offset, int count)
{
ValidateArguments(buffer, offset, count);
CheckDisposed();
int dataLeft = dataEndOffset - reader.StreamOffset;
int n = Math.Min(dataLeft, count);
int nread = n > 0 ? reader.ReadAttributeRawValue(buffer, offset, n) : 0;
dataLeft -= nread;
if (dataLeft == 0 && valueEndOffset > reader.StreamOffset)
{
int valueLeft = valueEndOffset - reader.StreamOffset;
var buf = ArrayPool <byte> .Shared.Rent(valueLeft);
try {
reader.ReadAttributeRawValue(buf, 0, valueLeft);
} finally {
ArrayPool <byte> .Shared.Return(buf);
}
}
return(nread);
}
/// <summary>
/// Reads a sequence of bytes from the stream and advances the position
/// within the stream by the number of bytes read.
/// </summary>
/// <remarks>
/// Reads a sequence of bytes from the stream and advances the position
/// within the stream by the number of bytes read.
/// </remarks>
/// <returns>The total number of bytes read into the buffer. This can be less than the number of bytes requested if that many
/// bytes are not currently available, or zero (0) if the end of the stream has been reached.</returns>
/// <param name="buffer">The buffer to read data into.</param>
/// <param name="offset">The offset into the buffer to start reading data.</param>
/// <param name="count">The number of bytes to read.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="buffer"/> is <c>null</c>.
/// </exception>
/// <exception cref="System.ArgumentOutOfRangeException">
/// <para><paramref name="offset"/> is less than zero or greater than the length of <paramref name="buffer"/>.</para>
/// <para>-or-</para>
/// <para>The <paramref name="buffer"/> is not large enough to contain <paramref name="count"/> bytes starting
/// at the specified <paramref name="offset"/>.</para>
/// </exception>
/// <exception cref="System.ObjectDisposedException">
/// The stream has been disposed.
/// </exception>
/// <exception cref="System.IO.IOException">
/// An I/O error occurred.
/// </exception>
public override int Read(byte[] buffer, int offset, int count)
{
ValidateArguments(buffer, offset, count);
CheckDisposed();
int valueLeft = valueEndOffset - reader.StreamOffset;
int n = Math.Min(valueLeft, count);
return(n > 0 ? reader.ReadAttributeRawValue(buffer, offset, n) : 0);
}
/// <summary>
/// Reads a sequence of bytes from the stream and advances the position
/// within the stream by the number of bytes read.
/// </summary>
/// <remarks>
/// Reads a sequence of bytes from the stream and advances the position
/// within the stream by the number of bytes read.
/// </remarks>
/// <returns>The total number of bytes read into the buffer. This can be less than the number of bytes requested if that many
/// bytes are not currently available, or zero (0) if the end of the stream has been reached.</returns>
/// <param name="buffer">The buffer to read data into.</param>
/// <param name="offset">The offset into the buffer to start reading data.</param>
/// <param name="count">The number of bytes to read.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="buffer"/> is <c>null</c>.
/// </exception>
/// <exception cref="System.ArgumentOutOfRangeException">
/// <para><paramref name="offset"/> is less than zero or greater than the length of <paramref name="buffer"/>.</para>
/// <para>-or-</para>
/// <para>The <paramref name="buffer"/> is not large enough to contain <paramref name="count"/> bytes starting
/// at the specified <paramref name="offset"/>.</para>
/// </exception>
/// <exception cref="System.ObjectDisposedException">
/// The stream has been disposed.
/// </exception>
/// <exception cref="System.IO.IOException">
/// An I/O error occurred.
/// </exception>
public override int Read(byte[] buffer, int offset, int count)
{
ValidateArguments(buffer, offset, count);
CheckDisposed();
int dataLeft = dataEndOffset - reader.StreamOffset;
int n = Math.Min(dataLeft, count);
int nread = n > 0 ? reader.ReadAttributeRawValue(buffer, offset, n) : 0;
dataLeft -= nread;
if (dataLeft == 0 && valueEndOffset > reader.StreamOffset)
{
int valueLeft = valueEndOffset - reader.StreamOffset;
var buf = new byte[valueLeft];
reader.ReadAttributeRawValue(buf, 0, buf.Length);
}
return(nread);
}