public static bool TryWriteUInt16LittleEndian(Span <byte> destination, ushort value)
{
if (!BitConverter.IsLittleEndian)
{
value = ReverseEndianness(value);
}
return(MemoryMarshal.TryWrite(destination, ref value));
}
public void MemoryMarshalTryWrite()
{
for (int i = 0; i < Ops; i++)
{
var netInt = IPAddress.HostToNetworkOrder(i);
MemoryMarshal.TryWrite(forMemoryBuffer, ref netInt);
}
}
public static bool TryWriteSingleBigEndian(Span <byte> destination, float value)
{
if (BitConverter.IsLittleEndian)
{
int tmp = ReverseEndianness(BitConverter.SingleToInt32Bits(value));
return(MemoryMarshal.TryWrite(destination, ref tmp));
}
return(MemoryMarshal.TryWrite(destination, ref value));
}
public static bool TryWriteDoubleBigEndian(Span <byte> destination, double value)
{
if (BitConverter.IsLittleEndian)
{
long tmp = ReverseEndianness(BitConverter.DoubleToInt64Bits(value));
return(MemoryMarshal.TryWrite(destination, ref tmp));
}
return(MemoryMarshal.TryWrite(destination, ref value));
}
public static bool TryWriteHalfBigEndian(Span <byte> destination, Half value)
{
if (BitConverter.IsLittleEndian)
{
short tmp = ReverseEndianness(BitConverter.HalfToInt16Bits(value));
return(MemoryMarshal.TryWrite(destination, ref tmp));
}
return(MemoryMarshal.TryWrite(destination, ref value));
}
public static bool TryWriteUInt64LittleEndian(Span <byte> destination, ulong value)
{
if (!BitConverter.IsLittleEndian)
{
ulong tmp = ReverseEndianness(value);
return(MemoryMarshal.TryWrite(destination, ref tmp));
}
return(MemoryMarshal.TryWrite(destination, ref value));
}
public void SpanWriteFail()
{
byte byteValue = 1;
sbyte sbyteValue = 1;
short shortValue = 1;
ushort ushortValue = 1;
int intValue = 1;
uint uintValue = 1;
long longValue = 1;
ulong ulongValue = 1;
Span <byte> span = new byte[1];
MemoryMarshal.Write <byte>(span, ref byteValue);
byte read = MemoryMarshal.Read <byte>(span);
Assert.Equal <byte>(byteValue, read);
span.Clear();
Assert.True(MemoryMarshal.TryWrite <byte>(span, ref byteValue));
read = MemoryMarshal.Read <byte>(span);
Assert.Equal <byte>(byteValue, read);
MemoryMarshal.Write <sbyte>(span, ref sbyteValue);
sbyte readSbyte = MemoryMarshal.Read <sbyte>(span);
Assert.Equal <sbyte>(sbyteValue, readSbyte);
span.Clear();
Assert.True(MemoryMarshal.TryWrite <sbyte>(span, ref sbyteValue));
readSbyte = MemoryMarshal.Read <sbyte>(span);
Assert.Equal <sbyte>(sbyteValue, readSbyte);
MemoryTestHelpers.AssertThrows <ArgumentOutOfRangeException, byte>(span, (_span) => MemoryMarshal.Write <short>(_span, ref shortValue));
Assert.False(MemoryMarshal.TryWrite <short>(span, ref shortValue));
MemoryTestHelpers.AssertThrows <ArgumentOutOfRangeException, byte>(span, (_span) => MemoryMarshal.Write <int>(_span, ref intValue));
Assert.False(MemoryMarshal.TryWrite <int>(span, ref intValue));
MemoryTestHelpers.AssertThrows <ArgumentOutOfRangeException, byte>(span, (_span) => MemoryMarshal.Write <long>(_span, ref longValue));
Assert.False(MemoryMarshal.TryWrite <long>(span, ref longValue));
MemoryTestHelpers.AssertThrows <ArgumentOutOfRangeException, byte>(span, (_span) => MemoryMarshal.Write <ushort>(_span, ref ushortValue));
Assert.False(MemoryMarshal.TryWrite <ushort>(span, ref ushortValue));
MemoryTestHelpers.AssertThrows <ArgumentOutOfRangeException, byte>(span, (_span) => MemoryMarshal.Write <uint>(_span, ref uintValue));
Assert.False(MemoryMarshal.TryWrite <uint>(span, ref uintValue));
MemoryTestHelpers.AssertThrows <ArgumentOutOfRangeException, byte>(span, (_span) => MemoryMarshal.Write <ulong>(_span, ref ulongValue));
Assert.False(MemoryMarshal.TryWrite <ulong>(span, ref ulongValue));
var structValue = new MemoryTestHelpers.TestValueTypeWithReference {
I = 1, S = "1"
};
MemoryTestHelpers.AssertThrows <ArgumentException, byte>(span, (_span) => MemoryMarshal.Write <MemoryTestHelpers.TestValueTypeWithReference>(_span, ref structValue));
MemoryTestHelpers.AssertThrows <ArgumentException, byte>(span, (_span) => MemoryMarshal.TryWrite <MemoryTestHelpers.TestValueTypeWithReference>(_span, ref structValue));
}
public void TryWrite()
{
Span <byte> buffer = new byte[4];
uint value = uint.MaxValue;
Assert.True(MemoryMarshal.TryWrite(buffer, ref value));
for (var i = 0; i < buffer.Length; i++)
{
Assert.Equal(255, buffer[i]);
}
buffer = buffer.Slice(1);
Assert.False(MemoryMarshal.TryWrite(buffer, ref value));
}
public bool TryPush <T>(ref T data) where T : struct
{
if (!(data is Message))
{
throw new ArgumentException();
}
var writeSpan = GetWriteSpan();
if (MemoryMarshal.TryWrite(writeSpan, ref data))
{
Commit(Marshal.SizeOf(data));
return(true);
}
return(false);
}
private static void WriteBase64GuidUnrolled(Span <char> chars, Guid toWrite)
{
// custom Url safe Base64 format, last two chars changed
const string Base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-";
Span <byte> guidBytes = stackalloc byte[16];
// write bytes from the Guid
MemoryMarshal.TryWrite(guidBytes, ref toWrite);
/*
* Base64 encoding algorithm, it turns 3 bytes into 4 chars.
* This goes from last to first, so the compiler can remove bounds checking from the Span's
* This is could be done in a loop, but it is Unrolled for performance
*/
// last two bytes to encode. Add no Base64 padding "=="
chars[21] = Base64Chars[(guidBytes[15] & 0x03) << 4];
chars[20] = Base64Chars[guidBytes[15] >> 2];
chars[19] = Base64Chars[guidBytes[14] & 0x3f];
chars[18] = Base64Chars[((guidBytes[13] & 0x0f) << 2) | (guidBytes[14] >> 6)];
chars[17] = Base64Chars[((guidBytes[12] & 0x03) << 4) | (guidBytes[13] >> 4)];
chars[16] = Base64Chars[guidBytes[12] >> 2];
chars[15] = Base64Chars[guidBytes[11] & 0x3f];
chars[14] = Base64Chars[((guidBytes[10] & 0x0f) << 2) | (guidBytes[11] >> 6)];
chars[13] = Base64Chars[((guidBytes[9] & 0x03) << 4) | (guidBytes[10] >> 4)];
chars[12] = Base64Chars[guidBytes[9] >> 2];
chars[11] = Base64Chars[guidBytes[8] & 0x3f];
chars[10] = Base64Chars[((guidBytes[7] & 0x0f) << 2) | (guidBytes[8] >> 6)];
chars[09] = Base64Chars[((guidBytes[6] & 0x03) << 4) | (guidBytes[7] >> 4)];
chars[08] = Base64Chars[guidBytes[6] >> 2];
chars[07] = Base64Chars[guidBytes[5] & 0x3f];
chars[06] = Base64Chars[((guidBytes[4] & 0x0f) << 2) | (guidBytes[5] >> 6)];
chars[05] = Base64Chars[((guidBytes[3] & 0x03) << 4) | (guidBytes[4] >> 4)];
chars[04] = Base64Chars[guidBytes[3] >> 2];
chars[03] = Base64Chars[guidBytes[2] & 0x3f];
chars[02] = Base64Chars[((guidBytes[1] & 0x0f) << 2) | (guidBytes[2] >> 6)];
chars[01] = Base64Chars[((guidBytes[0] & 0x03) << 4) | (guidBytes[1] >> 4)];
chars[00] = Base64Chars[guidBytes[0] >> 2];
}
public static string ToBase64(this Guid guid)
{
Span <byte> raw = stackalloc byte[16];
Span <byte> utf8 = stackalloc byte[24];
MemoryMarshal.TryWrite(raw, ref guid);
Base64.EncodeToUtf8(raw, utf8, out _, out _);
Span <char> b64 = stackalloc char[22];
for (var i = 0; i < 22; i++)
{
b64[i] = utf8[i] switch
{
ForwardSlashByte => Underscore,
PlusByte => Dash,
_ => (char)utf8[i]
};
}
return(new string(b64));
}
public void RentWholeArray()
{
var bufferForGuid = ArrayPool <byte> .Shared.Rent(16 *Elements);
try
{
for (var i = 0; i < Elements; i++)
{
var guid = Guid.NewGuid();
if (!MemoryMarshal.TryWrite(bufferForGuid.AsSpan(i * 16, 16), ref guid))
{
guid.ToByteArray().AsSpan().CopyTo(bufferForGuid);
}
consumer.Consume(new ArraySegment <byte>(bufferForGuid, i * 16, 16));
}
}
finally
{
ArrayPool <byte> .Shared.Return(bufferForGuid);
}
}
/// <summary>
/// Encodes GUID to Base64 string.
/// <note>
/// Inspired by https://www.stevejgordon.co.uk/using-high-performance-dotnetcore-csharp-techniques-to-base64-encode-a-guid
/// </note>
/// </summary>
/// <param name="guid">The <see cref="T:System.Guid">Guid</see> to encode.</param>
/// <param name="replaceForwardSlashWith">Character that will replace forward slash '/'.</param>
/// <param name="replacePlusWith">Character that will replace plus '+'.</param>
/// <returns>Base64 version of <see cref="T:System.Guid"></see>.</returns>
public static string EncodeBase64String(this Guid guid, char replaceForwardSlashWith = '_',
char replacePlusWith = '-')
{
Span <byte> guidBytes = stackalloc byte[16];
MemoryMarshal.TryWrite(guidBytes, ref guid);
Span <byte> encodedBytes = stackalloc byte[24];
Base64.EncodeToUtf8(guidBytes, encodedBytes, out _, out _);
Span <char> chars = stackalloc char[22];
const byte forwardSlashByte = (byte)'/';
const byte plusByte = (byte)'+';
// Replace any characters which are not URL safe.
// Skip the final two bytes as these will be '==' padding we don't need.
for (var i = 0; i < 22; i++)
{
chars[i] = encodedBytes[i] switch
{
forwardSlashByte => replaceForwardSlashWith,
plusByte => replacePlusWith,
_ => (char)encodedBytes[i]
};
}
#if NETSTANDARD2_0 // TODO: Delete when Unity will support at least .net standard 2.1
var final = new string(chars.ToArray());
#else
var final = new string(chars);
#endif
return(final);
}
}
public static string EncodeBase64String(this Guid guid)
{
Span <byte> guidBytes = stackalloc byte[16];
Span <byte> encodedBytes = stackalloc byte[24];
MemoryMarshal.TryWrite(guidBytes, ref guid);
Base64.EncodeToUtf8(guidBytes, encodedBytes, out _, out _);
Span <char> chars = stackalloc char[22];
for (var i = 0; i < 22; i++)
{
chars[i] = (encodedBytes[i]) switch
{
ForwardSlashByte => Dash,
PlusByte => Underscore,
_ => (char)encodedBytes[i],
};
}
var final = new string(chars);
return(final);
}
public static bool TryGetBytes(char typecode, object obj, Span <byte> dest)
{
switch (typecode)
{
case 'c':
var bytecharVal = (byte)((Bytes)obj)[0];
return(MemoryMarshal.TryWrite(dest, ref bytecharVal));
case 'b':
var sbyteVal = (byte)Convert.ToSByte(obj);
return(MemoryMarshal.TryWrite(dest, ref sbyteVal));
case 'B':
var byteVal = Convert.ToByte(obj);
return(MemoryMarshal.TryWrite(dest, ref byteVal));
case '?':
var boolVal = PythonOps.IsTrue(obj);
return(MemoryMarshal.TryWrite(dest, ref boolVal));
case 'h':
var shortVal = Convert.ToInt16(obj);
return(MemoryMarshal.TryWrite(dest, ref shortVal));
case 'H':
var ushortVal = Convert.ToUInt16(obj);
return(MemoryMarshal.TryWrite(dest, ref ushortVal));
case 'l':
case 'i':
case 'n':
var intVal = Convert.ToInt32(obj);
return(MemoryMarshal.TryWrite(dest, ref intVal));
case 'L':
case 'I':
case 'N':
var uintVal = Convert.ToUInt32(obj);
return(MemoryMarshal.TryWrite(dest, ref uintVal));
case 'f':
var singleVal = Convert.ToSingle(obj);
return(MemoryMarshal.TryWrite(dest, ref singleVal));
case 'd':
var doubleVal = Convert.ToDouble(obj);
return(MemoryMarshal.TryWrite(dest, ref doubleVal));
case 'q':
var longVal = Convert.ToInt64(obj);
return(MemoryMarshal.TryWrite(dest, ref longVal));
case 'Q':
var ulongVal = Convert.ToUInt64(obj);
return(MemoryMarshal.TryWrite(dest, ref ulongVal));
case 'P':
var bi = (BigInteger)obj;
if (UIntPtr.Size == 4)
{
if (bi < 0)
{
bi += new BigInteger(UInt32.MaxValue) + 1;
}
var ptrVal = (uint)bi;
return(MemoryMarshal.TryWrite(dest, ref ptrVal));
}
else
{
if (bi < 0)
{
bi += new BigInteger(UInt64.MaxValue) + 1;
}
var ptrVal = (ulong)bi;
return(MemoryMarshal.TryWrite(dest, ref ptrVal));
}
case 'r':
var iptrVal = (IntPtr)obj;
return(MemoryMarshal.TryWrite(dest, ref iptrVal));
case 'R':
var uptrVal = (UIntPtr)obj;
return(MemoryMarshal.TryWrite(dest, ref uptrVal));
default:
return(false);
}
}
public void SpanWrite()
{
Assert.True(BitConverter.IsLittleEndian);
Span <byte> span = new byte[8];
byte byteValue = 0x11;
MemoryMarshal.Write <byte>(span, ref byteValue);
TestHelpers.Validate <byte>(span, byteValue);
Assert.True(MemoryMarshal.TryWrite <byte>(span, ref byteValue));
TestHelpers.Validate <byte>(span, byteValue);
sbyte sbyteValue = 0x11;
MemoryMarshal.Write <sbyte>(span, ref sbyteValue);
TestHelpers.Validate <sbyte>(span, sbyteValue);
Assert.True(MemoryMarshal.TryWrite <sbyte>(span, ref sbyteValue));
TestHelpers.Validate <sbyte>(span, sbyteValue);
ushort ushortValue = 0x1122;
MemoryMarshal.Write <ushort>(span, ref ushortValue);
TestHelpers.Validate <ushort>(span, ushortValue);
Assert.True(MemoryMarshal.TryWrite <ushort>(span, ref ushortValue));
TestHelpers.Validate <ushort>(span, ushortValue);
uint uintValue = 0x11223344;
MemoryMarshal.Write <uint>(span, ref uintValue);
TestHelpers.Validate <uint>(span, uintValue);
Assert.True(MemoryMarshal.TryWrite <uint>(span, ref uintValue));
TestHelpers.Validate <uint>(span, uintValue);
ulong ulongValue = 0x1122334455667788;
MemoryMarshal.Write <ulong>(span, ref ulongValue);
TestHelpers.Validate <ulong>(span, ulongValue);
Assert.True(MemoryMarshal.TryWrite <ulong>(span, ref ulongValue));
TestHelpers.Validate <ulong>(span, ulongValue);
short shortValue = 0x1122;
MemoryMarshal.Write <short>(span, ref shortValue);
TestHelpers.Validate <short>(span, shortValue);
Assert.True(MemoryMarshal.TryWrite <short>(span, ref shortValue));
TestHelpers.Validate <short>(span, shortValue);
int intValue = 0x11223344;
MemoryMarshal.Write <int>(span, ref intValue);
TestHelpers.Validate <int>(span, intValue);
Assert.True(MemoryMarshal.TryWrite <int>(span, ref intValue));
TestHelpers.Validate <int>(span, intValue);
long longValue = 0x1122334455667788;
MemoryMarshal.Write <long>(span, ref longValue);
TestHelpers.Validate <long>(span, longValue);
Assert.True(MemoryMarshal.TryWrite <long>(span, ref longValue));
TestHelpers.Validate <long>(span, longValue);
float floatValue = BitConverter.Int32BitsToSingle(0x11223344);
MemoryMarshal.Write <float>(span, ref floatValue);
TestHelpers.Validate <float>(span, floatValue);
Assert.True(MemoryMarshal.TryWrite <float>(span, ref floatValue));
TestHelpers.Validate <float>(span, floatValue);
double doubleValue = BitConverter.Int64BitsToDouble(0x1122334455667788);
MemoryMarshal.Write <double>(span, ref doubleValue);
TestHelpers.Validate <double>(span, doubleValue);
Assert.True(MemoryMarshal.TryWrite <double>(span, ref doubleValue));
TestHelpers.Validate <double>(span, doubleValue);
}
