46 lines
1.3 KiB
C#
46 lines
1.3 KiB
C#
using System.Threading;
|
|
using System.Threading.Tasks;
|
|
using AMWD.Protocols.Modbus.Tcp.Utils;
|
|
|
|
namespace System.IO
|
|
{
|
|
internal static class StreamExtensions
|
|
{
|
|
public static async Task<byte[]> ReadExpectedBytesAsync(this Stream stream, int expectedBytes, CancellationToken cancellationToken = default)
|
|
{
|
|
byte[] buffer = new byte[expectedBytes];
|
|
int offset = 0;
|
|
do
|
|
{
|
|
int count = await stream.ReadAsync(buffer, offset, expectedBytes - offset, cancellationToken);
|
|
if (count < 1)
|
|
throw new EndOfStreamException();
|
|
|
|
offset += count;
|
|
}
|
|
while (offset < expectedBytes && !cancellationToken.IsCancellationRequested);
|
|
|
|
cancellationToken.ThrowIfCancellationRequested();
|
|
return buffer;
|
|
}
|
|
|
|
public static async Task<byte[]> ReadExpectedBytesAsync(this NetworkStreamWrapper stream, int expectedBytes, CancellationToken cancellationToken = default)
|
|
{
|
|
byte[] buffer = new byte[expectedBytes];
|
|
int offset = 0;
|
|
do
|
|
{
|
|
int count = await stream.ReadAsync(buffer, offset, expectedBytes - offset, cancellationToken);
|
|
if (count < 1)
|
|
throw new EndOfStreamException();
|
|
|
|
offset += count;
|
|
}
|
|
while (offset < expectedBytes && !cancellationToken.IsCancellationRequested);
|
|
|
|
cancellationToken.ThrowIfCancellationRequested();
|
|
return buffer;
|
|
}
|
|
}
|
|
}
|