public void SetLengthTest()
{
using (var m = new SafeHGlobalHandle(1000))
using (var ms = new NativeMemoryStream((IntPtr)m, m.Size))
{
Assert.That(() => ms.SetLength(-1), Throws.TypeOf <ArgumentOutOfRangeException>());
Assert.That(() => ms.SetLength(1001), Throws.Exception);
Assert.That(() => ms.SetLength(100), Throws.Nothing);
}
}
public void DisposedTest()
{
var ms = new NativeMemoryStream(20);
ms.Dispose();
Assert.That(ms.CanRead, Is.False);
Assert.That(ms.CanSeek, Is.False);
Assert.That(ms.CanWrite, Is.False);
Assert.That(() => ms.Capacity > 0, Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.Read <int>(), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.Read(typeof(int)), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.Read(new byte[3], 0, 3), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.ReadByte(), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.ReadArray(typeof(byte), 1, false), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.ReadReference <int>(), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.ReadReference <string>(), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.Seek(0, SeekOrigin.Begin), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.SetLength(20), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.Write("X"), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.Write("X", CharSet.Ansi), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.Write(new[] { "X", "Y" }), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.Write(new byte[3], 0, 3), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.Write(new[] { 1, 2 }), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.Write(256), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.WriteByte(1), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.WriteObject(Guid.NewGuid()), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.WriteReference("X"), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.WriteReference(256), Throws.InstanceOf <ObjectDisposedException>());
Assert.That(() => ms.WriteReferenceObject(Guid.NewGuid()), Throws.InstanceOf <ObjectDisposedException>());
}
/// <summary>
/// Marshals data from a managed list of strings to an unmanaged block of memory allocated by the <paramref name="memAlloc"/> method.
/// </summary>
/// <param name="values">The enumerated list of strings to marshal.</param>
/// <param name="packing">The packing type for the strings.</param>
/// <param name="memAlloc">
/// The function that allocates the memory for the block of strings (typically <see cref="Marshal.AllocCoTaskMem(int)"/> or <see cref="Marshal.AllocHGlobal(int)"/>.
/// </param>
/// <param name="bytesAllocated">The bytes allocated by the <paramref name="memAlloc"/> method.</param>
/// <param name="charSet">The character set to use for the strings.</param>
/// <param name="prefixBytes">Number of bytes preceding the trailing strings.</param>
/// <returns>
/// Pointer to the allocated native (unmanaged) array of strings stored using the <paramref name="packing"/> model and the character
/// set defined by <paramref name="charSet"/>.
/// </returns>
public static IntPtr MarshalToPtr(this IEnumerable <string> values, StringListPackMethod packing, Func <int, IntPtr> memAlloc, out int bytesAllocated, CharSet charSet = CharSet.Auto, int prefixBytes = 0)
{
// Bail early if empty
if (values is null || !values.Any())
{
bytesAllocated = prefixBytes + (packing == StringListPackMethod.Concatenated ? StringHelper.GetCharSize(charSet) : IntPtr.Size);
var ret = memAlloc(bytesAllocated);
ret.FillMemory(0, bytesAllocated);
return(ret);
}
// Write to memory stream
using (var ms = new NativeMemoryStream(1024, 1024)
{
CharSet = charSet
})
{
ms.SetLength(ms.Position = prefixBytes);
if (packing == StringListPackMethod.Packed)
{
foreach (var s in values)
{
ms.WriteReference(s);
}
ms.WriteReference(null);
}
else
{
foreach (var s in values)
{
if (string.IsNullOrEmpty(s))
{
throw new ArgumentException("Concatenated string arrays cannot contain empty or null strings.");
}
ms.Write(s);
}
ms.Write("");
}
ms.Flush();
// Copy to newly allocated memory using memAlloc
bytesAllocated = (int)ms.Length;
var ret = memAlloc(bytesAllocated);
ms.Pointer.CopyTo(ret, bytesAllocated);
return(ret);
}
}
/// <summary>
/// Marshals data from a managed list of objects to an unmanaged block of memory allocated by the <paramref name="memAlloc"/> method.
/// </summary>
/// <param name="values">The enumerated list of objects to marshal.</param>
/// <param name="memAlloc">
/// The function that allocates the memory for the block of objects (typically <see cref="Marshal.AllocCoTaskMem(int)"/> or <see cref="Marshal.AllocHGlobal(int)"/>.
/// </param>
/// <param name="bytesAllocated">The bytes allocated by the <paramref name="memAlloc"/> method.</param>
/// <param name="referencePointers">
/// if set to <see langword="true"/> the pointer will be processed by storing a reference to the value; if <see langword="false"/>,
/// the pointer value will be directly inserted into the array of pointers.
/// </param>
/// <param name="charSet">The character set to use for strings.</param>
/// <param name="prefixBytes">Number of bytes preceding the allocated objects.</param>
/// <returns>Pointer to the allocated native (unmanaged) array of objects stored using the character set defined by <paramref name="charSet"/>.</returns>
public static IntPtr MarshalObjectsToPtr(this IEnumerable <object> values, Func <int, IntPtr> memAlloc, out int bytesAllocated, bool referencePointers = false, CharSet charSet = CharSet.Auto, int prefixBytes = 0)
{
// Bail early if empty
if (values is null || !values.Any())
{
bytesAllocated = prefixBytes + IntPtr.Size;
var ret = memAlloc(bytesAllocated);
ret.FillMemory(0, bytesAllocated);
return(ret);
}
// Write to memory stream
using (var ms = new NativeMemoryStream(1024, 1024)
{
CharSet = charSet
})
{
ms.SetLength(ms.Position = prefixBytes);
foreach (var o in values)
{
if (referencePointers)
{
ms.WriteReferenceObject(o);
}
else
{
ms.WriteObject(o);
}
}
if (referencePointers)
{
ms.WriteReference(null);
}
ms.Flush();
// Copy to newly allocated memory using memAlloc
bytesAllocated = (int)ms.Length;
var ret = memAlloc(bytesAllocated);
ms.Pointer.CopyTo(ret, bytesAllocated);
return(ret);
}
}
