public void Encode()
{
var writer = new PackedBitWriter();
var serializer = new PackedBitSerializer(typeof(PasswordProperties));
serializer.Serialize(writer, Properties);
byte[] bytes = writer.ToArray();
// The bitpacking we use assumes that information is packed from the left which means that it makes a big difference for a byte full of bools
// Information is actually packed from the right of the byte
// Ergo we just have to flip each byte
// However first we handle the only 32-bit value (which can't be fixed by a naive flip)
if (!BitConverter.IsLittleEndian)
{
// The game age value comes in little-endian format
Swap(bytes, GameAgeStartByteIndex, GameAgeEndByteIndex);
Swap(bytes, GameAgeStartByteIndex + 1, GameAgeEndByteIndex - 1);
}
for (int i = 0; i < ChecksumByteCount; i++)
{
if (i >= GameAgeStartByteIndex && i <= GameAgeEndByteIndex)
{
continue;
}
bytes[i] = bytes[i].ReverseBits();
}
byte checksum = CalculateChecksum(bytes, Properties.Shift);
Properties.Checksum = checksum;
if (Properties.Shift > 0)
{
bytes = bytes.RotateRight(Properties.Shift);
}
byte[] encoded = new byte[ChecksumByte];
Buffer.BlockCopy(bytes, 0, encoded, 0, ChecksumByteCount);
encoded[ShiftByte - 1] = Properties.Shift;
encoded[ChecksumByte - 1] = Properties.Checksum;
Encoded = AlphabetMapper.TranslateComputerBytesToMetroidString(encoded);
}
public void ArgumentValidation()
{
PackedBitWriter writer = new PackedBitWriter();
Assert.ThrowsExact <BitCountException>(() => writer.Write(-1, byte.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(-1, ushort.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(-1, uint.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(-1, ulong.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(0, byte.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(0, ushort.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(0, uint.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(0, ulong.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(65, byte.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(65, ushort.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(65, uint.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(65, ulong.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(-1, sbyte.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(-1, short.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(-1, int.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(-1, long.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(0, sbyte.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(0, short.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(0, int.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(0, long.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(65, sbyte.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(65, short.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(65, int.MaxValue));
Assert.ThrowsExact <BitCountException>(() => writer.Write(65, long.MaxValue));
Assert.ThrowsExact <ArgumentNullException>(() => writer.Write(null as string));
Assert.ThrowsExact <ArgumentNullException>(() => writer.Write(null as string, Encoding.UTF8));
Assert.ThrowsExact <ArgumentNullException>(() => writer.Write("string", null));
Assert.ThrowsExact <BitCountException>(() => writer.Write(-1, new byte[] { 0 }));
Assert.ThrowsExact <BitCountException>(() => writer.Write(0, new byte[] { 0 }));
Assert.ThrowsExact <BitCountException>(() => writer.Write(65, new byte[] { 0 }));
Assert.ThrowsExact <ArgumentNullException>(() => writer.Write(1, null as byte[]));
Assert.ThrowsExact <ArgumentException>(() => writer.Write(1, new byte[0]));
Assert.ThrowsExact <ArgumentException>(() => writer.Write(1, new byte[0]));
}
private void WriteImperativeBits(PackedBitWriter writer, object value, IEnumerable <PropertyInfo> properties, Func <PropertyInfo, BitPair> getBitPair)
{
foreach (PropertyInfo prop in properties)
{
if (prop.PropertyType == typeof(bool))
{
writer.Write((bool)prop.GetValue(value, null));
}
else
{
BitPair write = getBitPair(prop);
int bitRange = write.Count;
if (write.Signed)
{
if (prop.PropertyType == typeof(sbyte))
{
writer.WriteSigned(bitRange, (sbyte)prop.GetValue(value, null));
}
else if (prop.PropertyType == typeof(short))
{
writer.WriteSigned(bitRange, (short)prop.GetValue(value, null));
}
else if (prop.PropertyType == typeof(int))
{
writer.WriteSigned(bitRange, (int)prop.GetValue(value, null));
}
else if (prop.PropertyType == typeof(long))
{
writer.WriteSigned(bitRange, (long)prop.GetValue(value, null));
}
else
{
throw CodePath.Unreachable;
}
}
else
{
if (prop.PropertyType == typeof(sbyte))
{
writer.Write(bitRange, (sbyte)prop.GetValue(value, null));
}
else if (prop.PropertyType == typeof(short))
{
writer.Write(bitRange, (short)prop.GetValue(value, null));
}
else if (prop.PropertyType == typeof(int))
{
writer.Write(bitRange, (int)prop.GetValue(value, null));
}
else if (prop.PropertyType == typeof(long))
{
writer.Write(bitRange, (long)prop.GetValue(value, null));
}
else if (prop.PropertyType == typeof(byte))
{
writer.Write(bitRange, (byte)prop.GetValue(value, null));
}
else if (prop.PropertyType == typeof(ushort))
{
writer.Write(bitRange, (ushort)prop.GetValue(value, null));
}
else if (prop.PropertyType == typeof(uint))
{
writer.Write(bitRange, (uint)prop.GetValue(value, null));
}
else if (prop.PropertyType == typeof(ulong))
{
writer.Write(bitRange, (ulong)prop.GetValue(value, null));
}
else
{
throw CodePath.Unreachable;
}
}
}
}
}
/// <summary>
/// Serializes an object into a PackedBitWriter stream.
/// </summary>
/// <param name="writer">The stream to serialize to.</param>
/// <param name="value">The object to serialize.</param>
/// <exception cref="ArgumentNullException"><paramref name="writer" /> is null.</exception>
/// <exception cref="ArgumentNullException"><paramref name="value" /> is null.</exception>
public void Serialize(PackedBitWriter writer, object value)
{
if (object.ReferenceEquals(writer, null))
{
throw new ArgumentNullException(nameof(writer));
}
if (object.ReferenceEquals(value, null))
{
throw new ArgumentNullException(nameof(value));
}
if (ImplementsInterface)
{
((IPackedBitSerializable)value).Serialize(writer);
}
else
{
var properties = GetProperties(SerializeType);
if (HasOrder)
{
properties = properties.OrderBy(p => (p.GetCustomAttribute <PackedBitOrderAttribute>() ?? new PackedBitOrderAttribute(0)).LowBit);
WriteImperativeBits(writer, value, properties, (prop) => {
PackedBitOrderAttribute bitOrderAttr = prop.GetCustomAttribute <PackedBitOrderAttribute>();
return(new BitPair()
{
Count = bitOrderAttr.BitCount,
Signed = bitOrderAttr.Signed,
});
});
}
else if (HasRange)
{
properties = properties.OrderBy(p => (p.GetCustomAttribute <PackedBitRangeAttribute>() ?? new PackedBitRangeAttribute(0)).LowBit);
WriteImperativeBits(writer, value, properties, (prop) => {
PackedBitRangeAttribute bitRangeAttr = prop.GetCustomAttribute <PackedBitRangeAttribute>();
return(new BitPair()
{
Count = bitRangeAttr.HasHighBit ?
bitRangeAttr.HighBit - (bitRangeAttr.LowBit - 1) :
1,
Signed = bitRangeAttr.Signed,
});
});
}
else if (HasSize)
{
WriteImperativeBits(writer, value, properties, (prop) => {
PackedBitSizeAttribute bitSizeAttr = prop.GetCustomAttribute <PackedBitSizeAttribute>();
return(new BitPair()
{
Count = bitSizeAttr.BitCount,
Signed = bitSizeAttr.Signed,
});
});
}
else
{
throw CodePath.Unreachable;
}
}
}
public void Serialize(PackedBitWriter reader)
{
throw new NotImplementedException();
}
public void Basics()
{
PackedBitWriter writer = null;
Assert.DoesNotThrow(() => writer = new PackedBitWriter());
Assert.DoesNotThrow(() => writer.Write(true));
Assert.DoesNotThrow(() => writer.Write(false));
Assert.DoesNotThrow(() => writer.Write(false));
Assert.DoesNotThrow(() => writer.Write(true));
Assert.DoesNotThrow(() => writer.Write(true));
Assert.DoesNotThrow(() => writer.Write(true));
Assert.DoesNotThrow(() => writer.Write(true));
Assert.DoesNotThrow(() => writer.Write(false));
Assert.DoesNotThrow(() => writer.Write(false));
Assert.DoesNotThrow(() => writer.Write(true));
Assert.DoesNotThrow(() => writer.Write(4, (sbyte)3));
Assert.DoesNotThrow(() => writer.Write(4, (byte)4));
Assert.DoesNotThrow(() => writer.Write(6, (short)13));
Assert.DoesNotThrow(() => writer.Write(6, (ushort)14));
Assert.DoesNotThrow(() => writer.Write(6, (int)23));
Assert.DoesNotThrow(() => writer.Write(6, (uint)24));
Assert.DoesNotThrow(() => writer.Write(8, (long)33));
Assert.DoesNotThrow(() => writer.Write(8, (ulong)34));
Assert.DoesNotThrow(() => writer.Write(false));
Assert.DoesNotThrow(() => writer.Write(true));
Assert.DoesNotThrow(() => writer.Write(true));
Assert.DoesNotThrow(() => writer.Write(true));
Assert.DoesNotThrow(() => writer.Write(true));
Assert.DoesNotThrow(() => writer.Write(false));
Assert.DoesNotThrow(() => writer.Write(false));
Assert.DoesNotThrow(() => writer.Write(true));
Assert.DoesNotThrow(() => writer.WriteSigned(4, (sbyte)-3));
Assert.DoesNotThrow(() => writer.Write(2.4d));
Assert.DoesNotThrow(() => writer.Write(88.4f));
Assert.DoesNotThrow(() => writer.WriteSigned(6, (short)-13));
Assert.DoesNotThrow(() => writer.WriteSigned(6, (int)-23));
Assert.DoesNotThrow(() => writer.WriteSigned(8, (long)-33));
Assert.DoesNotThrow(() => writer.Write("datà"));
Assert.DoesNotThrow(() => writer.Write("data", Encoding.ASCII));
Assert.DoesNotThrow(() => writer.Write(2, (sbyte)3));
byte[] result = null;
// byteQuantity must have an exact bit count in order to be correct
// Please ensure that the test above produces an exact bit count
// Please also ensure that PackedBitReader is updated upon changes here
int byteQuantity = (
1 + 1 + 1 + 1 + 1 +
1 + 1 + 1 + 1 + 1 +
4 + 4 + 6 + 6 + 6 +
6 + 8 + 8 + 1 + 1 +
1 + 1 + 1 + 1 + 1 +
1 + 64 + 32 + 5 + 7 + 7 + 9 +
// datà should be 5 bytes in UTF8
// length should always be 32 bits
32 + 8 + 8 + 8 + 8 + 8 +
// Since ASCII is 7-bit, should be chars = bytes
32 + 8 + 8 + 8 + 8 +
2
) / Constants.BitsInByte;
Assert.DoesNotThrow(() => result = writer.ToArray());
Assert.NotNull(result);
Assert.Equal(result.Length, byteQuantity);
var hex = string.Join(
", ",
result.Select(v => "0x" + v.ToString("X2")));
}
