Add simple Async implementation.

Kaitai.Struct.Runtime.Async/Interface/IKaitaiAsyncStream.cs

@@ -0,0 +1,161 @@
+using System.Threading.Tasks;
+
+namespace Kaitai.Async
+{
+    public interface IKaitaiAsyncStream : IKaitaiStreamBase
+    {
+        /// <summary>
+        /// Seek to a specific position from the beginning of the stream
+        /// </summary>
+        /// <param name="position">The position to seek to</param>
+        Task SeekAsync(long position);
+
+        /// <summary>
+        /// Read a signed byte from the stream
+        /// </summary>
+        /// <returns></returns>
+        Task<sbyte> ReadS1Async();
+
+        /// <summary>
+        /// Read a signed short from the stream (big endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<short> ReadS2beAsync();
+
+        /// <summary>
+        /// Read a signed int from the stream (big endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<int> ReadS4beAsync();
+
+        /// <summary>
+        /// Read a signed long from the stream (big endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<long> ReadS8beAsync();
+
+        /// <summary>
+        /// Read a signed short from the stream (little endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<short> ReadS2leAsync();
+
+        /// <summary>
+        /// Read a signed int from the stream (little endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<int> ReadS4leAsync();
+
+        /// <summary>
+        /// Read a signed long from the stream (little endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<long> ReadS8leAsync();
+
+        /// <summary>
+        /// Read an unsigned byte from the stream
+        /// </summary>
+        /// <returns></returns>
+        Task<byte> ReadU1Async();
+
+        /// <summary>
+        /// Read an unsigned short from the stream (big endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<ushort> ReadU2beAsync();
+
+        /// <summary>
+        /// Read an unsigned int from the stream (big endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<uint> ReadU4beAsync();
+
+        /// <summary>
+        /// Read an unsigned long from the stream (big endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<ulong> ReadU8beAsync();
+
+        /// <summary>
+        /// Read an unsigned short from the stream (little endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<ushort> ReadU2leAsync();
+
+        /// <summary>
+        /// Read an unsigned int from the stream (little endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<uint> ReadU4leAsync();
+
+        /// <summary>
+        /// Read an unsigned long from the stream (little endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<ulong> ReadU8leAsync();
+
+        /// <summary>
+        /// Read a single-precision floating point value from the stream (big endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<float> ReadF4beAsync();
+
+        /// <summary>
+        /// Read a double-precision floating point value from the stream (big endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<double> ReadF8beAsync();
+
+        /// <summary>
+        /// Read a single-precision floating point value from the stream (little endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<float> ReadF4leAsync();
+
+        /// <summary>
+        /// Read a double-precision floating point value from the stream (little endian)
+        /// </summary>
+        /// <returns></returns>
+        Task<double> ReadF8leAsync();
+
+        Task<ulong> ReadBitsIntAsync(int n);
+        Task<ulong> ReadBitsIntLeAsync(int n);
+
+        /// <summary>
+        /// Read a fixed number of bytes from the stream
+        /// </summary>
+        /// <param name="count">The number of bytes to read</param>
+        /// <returns></returns>
+        Task<byte[]> ReadBytesAsync(long count);
+
+        /// <summary>
+        /// Read a fixed number of bytes from the stream
+        /// </summary>
+        /// <param name="count">The number of bytes to read</param>
+        /// <returns></returns>
+        Task<byte[]> ReadBytesAsync(ulong count);
+
+        /// <summary>
+        /// Read all the remaining bytes from the stream until the end is reached
+        /// </summary>
+        /// <returns></returns>
+        Task<byte[]> ReadBytesFullAsync();
+
+        /// <summary>
+        /// Read a terminated string from the stream
+        /// </summary>
+        /// <param name="terminator">The string terminator value</param>
+        /// <param name="includeTerminator">True to include the terminator in the returned string</param>
+        /// <param name="consumeTerminator">True to consume the terminator byte before returning</param>
+        /// <param name="eosError">True to throw an error when the EOS was reached before the terminator</param>
+        /// <returns></returns>
+        Task<byte[]> ReadBytesTermAsync(byte terminator, bool includeTerminator, bool consumeTerminator, bool eosError);
+
+        /// <summary>
+        /// Read a specific set of bytes and assert that they are the same as an expected result
+        /// </summary>
+        /// <param name="expected">The expected result</param>
+        /// <returns></returns>
+        Task<byte[]> EnsureFixedContentsAsync(byte[] expected);
+    }
+}

Kaitai.Struct.Runtime.Async/Kaitai.Struct.Runtime.Async.csproj

@@ -1,7 +1,16 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RootNamespace>Kaitai.Async</RootNamespace>
   </PropertyGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\Kaitai.Struct.Runtime\Kaitai.Struct.Runtime.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Overby.Extensions.AsyncBinaryReaderWriter" Version="1.0.39" />
+  </ItemGroup>
+
 </Project>

Kaitai.Struct.Runtime.Async/KaitaiAsyncStruct.cs

@@ -0,0 +1,15 @@
+namespace Kaitai.Async
+{
+  public abstract class KaitaiAsyncStruct
+  {
+    protected readonly KaitaiAsyncStream m_io;
+
+    protected KaitaiAsyncStruct(KaitaiAsyncStream kaitaiStream)
+    {
+      m_io = kaitaiStream;
+    }
+
+    // ReSharper disable once InconsistentNaming
+    public KaitaiAsyncStream M_Io => m_io;
+  }
+}