/// <summary>
/// Compress
/// </summary>
/// <param name="dataXf">can be null</param>
/// <param name="input">input array to compress</param>
/// <param name="compressedData"></param>
internal void Compress(DataXform dataXf, int[] input, List<byte> compressedData)
{
//
// use the writer to write to the list<byte>
//
BitStreamWriter writer = new BitStreamWriter(compressedData);
if (null != dataXf)
{
dataXf.ResetState();
int xfData = 0;
int xfExtra = 0;
for (uint i = 0; i < input.Length; i++)
{
dataXf.Transform(input[i], ref xfData, ref xfExtra);
Encode(xfData, xfExtra, writer);
}
}
else
{
for (uint i = 0; i < input.Length; i++)
{
Encode(input[i], 0, writer);
}
}
}
public static void WriteUInt64(this BitStreamWriter writer, UInt64 value)
{
BitConverterX.UInt64ToUInt32(value, out UInt32 left, out UInt32 right);
writer.WriteUInt32(left);
writer.WriteUInt32(right);
}
public static void WriteUInt16(this BitStreamWriter writer, UInt16 value)
{
writer.WriteBits(value, 16);
}
public static void WriteChar(this BitStreamWriter writer, Char value)
{
writer.WriteBits(value, 16);
}
internal override void WriteToStreamWriter(BitStreamWriter bsw)
{
throw new NotImplementedException();
}
internal override void WriteToStreamWriter(BitStreamWriter bsw)
{
bsw.WriteByte((byte)Channel);
MsgInfo?.WriteToStreamWriter(bsw);
}
public void Serialize(BitStreamWriter aWriter)
{
aWriter.WriteBit(0);
left.Serialize(aWriter);
right.Serialize(aWriter);
}
void WriteDynamicArraySize(BitStreamWriter writer, int count, ArrayDsdlType arrayDsdlType)
{
var bitLen = BitSerializer.IntBitLength(arrayDsdlType.MaxSize + 1);
BitSerializer.Write(writer, count, bitLen);
}
public static void Serialize(Single value, BitStreamWriter writer) => writer.WriteFloat32(value);
public static void Serialize(Byte value, BitStreamWriter writer) => writer.WriteByte(value);
public static void Serialize(object obj, BitStreamWriter writer) => impl.Serialize(obj, writer);
/// <summary>
/// Creates a 32x32 fingerprint for the specified bitmap.
/// </summary>
/// <param name="bitmap">The bitmap.</param>
/// <returns>Returns a fingerprint with 6 bits per pixel (32 px = 6144 bit = 768 byte = 1024 base32 chars).</returns>
public static FingerPrint Create(IBitmap32 bitmap)
{
using var thumb = bitmap.Resize(32, 32, ResizeMode.TouchFromInside);
var data = thumb.Data;
using var ms = new MemoryStream();
// calculate fingerprint and distance matrix
var writer = new BitStreamWriter(ms);
var distanceMatrix = new float[16];
{
int x = 0, y = 0;
ARGB last = 0;
foreach (ARGB pixel in data.Data)
{
if (++x > 15)
{
x = 0;
++y;
}
var r = pixel.Red >> 6;
var g = pixel.Green >> 6;
var b = pixel.Blue >> 6;
writer.WriteBits(r, 2);
writer.WriteBits(g, 2);
writer.WriteBits(b, 2);
unchecked
{
var i = ((y << 1) & 0xC) + (x >> 2);
var distance = Math.Abs(pixel.GetDistance(last));
distanceMatrix[i] += distance;
last = pixel;
}
}
}
// normalize matrix
var maxDistance = distanceMatrix.Max();
for (var i = 0; i < distanceMatrix.Length; i++)
{
distanceMatrix[i] /= maxDistance;
}
// calculate blocks
var blocks = new uint[4];
var index = new int[] { 0, 2, 8, 10 };
for (var i = 0; i < 4; i++)
{
var idx = index[i];
var blockValue = (uint)(255 * distanceMatrix[idx]) << 24;
blockValue |= (uint)(255 * distanceMatrix[idx + 1]) << 16;
blockValue |= (uint)(255 * distanceMatrix[idx + 4]) << 8;
blockValue |= (uint)(255 * distanceMatrix[idx + 5]);
blocks[i] = blockValue;
}
/*
* uint b1 = (uint)(uint.MaxValue * (distanceMatrix[0] + distanceMatrix[1] + distanceMatrix[4] + distanceMatrix[5]) /4);
* uint b2 = (uint)(uint.MaxValue * (distanceMatrix[3] + distanceMatrix[2] + distanceMatrix[7] + distanceMatrix[6]) / 4);
* uint b3 = (uint)(uint.MaxValue * (distanceMatrix[12] + distanceMatrix[13] + distanceMatrix[8] + distanceMatrix[9]) / 4);
* uint b4 = (uint)(uint.MaxValue * (distanceMatrix[15] + distanceMatrix[14] + distanceMatrix[11] + distanceMatrix[10]) / 4);
*/
return(new FingerPrint(32, blocks, ms.ToArray()));
}
void WriteUnionFieldIndex(BitStreamWriter writer, int index, CompositeDsdlTypeBase t)
{
var bitLen = BitSerializer.IntBitLength(t.Fields.Count);
BitSerializer.Write(writer, index, bitLen);
}
void SerializeObjectCore(
BitStreamWriter writer,
Func <string, ResolvedProperty?> propertyResolver,
ContainerContract containerContract,
DsdlType derivedDsdlType,
bool tailArrayOptimization)
{
var dsdlScheme = GetScheme <CompositeDsdlTypeBase>(containerContract, derivedDsdlType);
//WriteObjectStart(writer, value, contract, member, collectionContract, containerProperty);
VoidDsdlType voidDsdlType = null;
int voidDsdlTypeIndex = -1;
var isUnion = dsdlScheme.IsUnion;
var unionMemberFound = false;
for (int i = 0; i < dsdlScheme.Fields.Count; i++)
{
var dsdlMember = dsdlScheme.Fields[i];
var isLastMember = i == dsdlScheme.Fields.Count - 1;
if ((voidDsdlType = (dsdlMember.Type as VoidDsdlType)) != null)
{
voidDsdlTypeIndex = i;
if (!isUnion)
{
WriteAlignment(writer, voidDsdlType);
}
continue;
}
var resolvedProp = propertyResolver(dsdlMember.Name);
if (isUnion)
{
if (resolvedProp == null)
{
continue;
}
if (unionMemberFound)
{
throw new InvalidOperationException($"Cannot find single union value for type '{containerContract.UnderlyingType.FullName}'.");
}
unionMemberFound = true;
WriteUnionFieldIndex(writer, i, dsdlScheme);
var rp = resolvedProp.Value;
SerializeValue(writer, rp.MemberValue, rp.MemberContact, dsdlMember.Type);
}
else
{
if (resolvedProp == null)
{
throw new InvalidOperationException($"Cannot resove member '{containerContract.UnderlyingType.FullName}.{dsdlMember.Name}'.");
}
var rp = resolvedProp.Value;
var tao = tailArrayOptimization &&
isLastMember &&
dsdlMember.Type is ArrayDsdlType adt;
SerializeValue(writer, rp.MemberValue, rp.MemberContact, dsdlMember.Type, tao);
}
}
if (isUnion && !unionMemberFound)
{
if (voidDsdlType != null)
{
WriteUnionFieldIndex(writer, voidDsdlTypeIndex, dsdlScheme);
WriteAlignment(writer, voidDsdlType);
}
else
{
throw new InvalidOperationException($"Cannot find union value for '{containerContract.UnderlyingType.FullName}' type.");
}
}
}
public static void Serialize(Boolean value, BitStreamWriter writer) => writer.WriteBool(value);
/// <summary>
/// Compress - compresses the byte[] being read by the BitStreamReader into compressed data
/// </summary>
/// <param name="bitCount">the number of bits to use for each element</param>
/// <param name="reader">a reader over the byte[] to compress</param>
/// <param name="encodingType">int, short or byte?</param>
/// <param name="unitsToEncode">number of logical units to encoded</param>
/// <param name="compressedData">output write buffer</param>
internal void Compress(int bitCount, BitStreamReader reader, GorillaEncodingType encodingType, int unitsToEncode, List<byte> compressedData)
{
if (null == reader || null == compressedData)
{
throw new ArgumentNullException(StrokeCollectionSerializer.ISFDebugMessage("reader or compressedData was null in compress"));
}
if (bitCount < 0)
{
throw new ArgumentOutOfRangeException("bitCount");
}
if (unitsToEncode < 0)
{
throw new ArgumentOutOfRangeException("unitsToEncode");
}
if (bitCount == 0)
{
//adjust if the bitcount is 0
//(this makes bitCount 32)
switch (encodingType)
{
case GorillaEncodingType.Int:
{
bitCount = Native.BitsPerInt;
break;
}
case GorillaEncodingType.Short:
{
bitCount = Native.BitsPerShort;
break;
}
case GorillaEncodingType.Byte:
{
bitCount = Native.BitsPerByte;
break;
}
default:
{
throw new ArgumentException(StrokeCollectionSerializer.ISFDebugMessage("bogus GorillaEncodingType passed to compress"));
}
}
}
//have the writer adapt to the List<byte> passed in and write to it
BitStreamWriter writer = new BitStreamWriter(compressedData);
while (!reader.EndOfStream && unitsToEncode > 0)
{
int data = GetDataFromReader(reader, encodingType);
writer.Write((uint)data, bitCount);
unitsToEncode--;
}
}
public static void Serialize(ref Char value, BitStreamWriter writer) => writer.WriteChar(value);
/// <summary>
/// Decodes a single pixel row.
/// </summary>
public byte[] DecodeRow(byte[] data)
{
Reset(CCITT4DecoderState.White);
var reader = new BitStreamReaderReverse(new MemoryStream(data));
var writer = new BitStreamWriter(new MemoryStream());
while (reader.Position < reader.Length)
{
// read a bit
currentValue = (currentValue << 1) | reader.ReadBit();
currentBitLength++;
if (currentBitLength > 13)
{
throw new FormatException();
}
// did we get a EndOfLine code ?
if ((currentBitLength == EOL[1]) && (currentValue == EOL[0]))
{
Reset(0);
continue;
}
if (state == 0)
{
// white makeup search
for (var i = 0; i < WhiteMakeUpCodes.GetLength(0); i++)
{
if ((WhiteMakeUpCodes[i, 1] == currentBitLength) &&
(WhiteMakeUpCodes[i, 0] == currentValue))
{
writer.WriteBits(WhiteMakeUpCodes[i, 2], true);
Reset(CCITT4DecoderState.WhiteTerminationRequired);
break;
}
}
if (state != 0)
{
continue;
}
}
if ((int)state <= 1)
{
// white termination search
for (var i = 0; i < WhiteTerminatingCodes.GetLength(0); i++)
{
if ((WhiteTerminatingCodes[i, 1] == currentBitLength) &&
(WhiteTerminatingCodes[i, 0] == currentValue))
{
writer.WriteBits(i, true);
Reset(CCITT4DecoderState.Black);
break;
}
}
if ((int)state != 1)
{
continue;
}
}
if ((int)state == 2)
{
// black makeup search
for (var i = 0; i < BlackMakeUpCodes.GetLength(0); i++)
{
if ((BlackMakeUpCodes[i, 1] == currentBitLength) &&
(BlackMakeUpCodes[i, 0] == currentValue))
{
writer.WriteBits(BlackMakeUpCodes[i, 2], false);
Reset(CCITT4DecoderState.BlackTerminationRequired);
break;
}
}
if ((int)state != 2)
{
continue;
}
}
if ((int)state >= 2)
{
// black termination search
for (var i = 0; i < BlackTerminatingCodes.GetLength(0); i++)
{
if ((BlackTerminatingCodes[i, 1] == currentBitLength) &&
(BlackTerminatingCodes[i, 0] == currentValue))
{
writer.WriteBits(i, false);
Reset(CCITT4DecoderState.White);
break;
}
}
if ((int)state != 3)
{
continue;
}
}
}
return(((MemoryStream)writer.BaseStream).ToArray());
}
public static void Serialize(ref Vector3Int value, BitStreamWriter writer) => writer.WriteVector3Int(value);
public void Serialize(BitStreamWriter aWriter)
{
aWriter.WriteBit(1);
aWriter.WriteBits(data, 8);
}
public static void Serialize(ref DateTime value, BitStreamWriter writer)
{
Log.Assert(value.Kind == DateTimeKind.Utc, "DateTime must be UTC");
writer.WriteInt64(value.Ticks);
}
public static void Write(BitStreamWriter destination, double value, int bitLength) => Write(destination, b => LittleEndianBitConverter.FillBytes(value, b), bitLength);
public static void Serialize(ref UInt64 value, BitStreamWriter writer) => writer.WriteUInt64(value);
public static void Serialize(ref Entity value, BitStreamWriter writer)
{
writer.WriteInt32(value.Index);
writer.WriteInt32(value.Version);
}
public static void Serialize(UInt32 value, BitStreamWriter writer) => writer.WriteUInt32(value);
public static void WriteInt32(this BitStreamWriter writer, Int32 value)
{
writer.WriteBits(BitConverterX.Int32ToUInt32(value), 32);
}
public static void Serialize(Int16 value, BitStreamWriter writer) => writer.WriteInt16(value);
public static void WriteUInt32(this BitStreamWriter writer, UInt32 value)
{
writer.WriteBits(value, 32);
}
internal override void WriteToStreamWriter(BitStreamWriter bsw)
{
}
/// <summary>
/// Encode
/// </summary>
/// <param name="data"></param>
/// <param name="extra"></param>
/// <param name="writer"></param>
/// <returns>number of bits encoded, 0 for failure</returns>
internal byte Encode(int data, int extra, BitStreamWriter writer)
{
if (writer == null)
{
throw new ArgumentNullException("writer");
}
if (data == 0)
{
writer.Write((byte)0, 1); //more efficent
return (byte)1;
}
// First, encode extra if non-ZERO
uint bitSize = _huffBits.GetSize();
if (0 != extra)
{
// Prefix lenght is 1 more than table size
byte extraPrefixLength = (byte)(bitSize + 1);
int extraPrefix = ((1 << extraPrefixLength) - 2);
writer.Write((uint)extraPrefix, (int)extraPrefixLength);
// Encode the extra data first
byte extraCodeLength = Encode(extra, 0, writer);
// Encode the actual data next
byte dataCodeLength = Encode(data, 0, writer);
// Return the total code lenght
return (byte)((int)extraPrefixLength + (int)extraCodeLength + (int)dataCodeLength);
}
// Find the absolute value of the data
// IMPORTANT : It is extremely important that nData is uint, and NOT int
// If it is int, the LONG_MIN will be encoded erroneaouly
uint nData = (uint)MathHelper.AbsNoThrow(data);
// Find the prefix lenght
byte nPrefLen = 1;
for (; (nPrefLen < bitSize) && (nData >= _mins[nPrefLen]); ++nPrefLen) ;
// Get the data length
uint nDataLen = _huffBits.GetBitsAtIndex((uint)nPrefLen - 1);
// Find the prefix
int nPrefix = ((1 << nPrefLen) - 2);
// Append the prefix to the bit stream
writer.Write((uint)nPrefix, (int)nPrefLen);
// Find the data offset by lower bound
// and append sign bit at LSB
Debug.Assert(nDataLen > 0 && nDataLen - 1 <= Int32.MaxValue);
int dataLenMinusOne = (int)(nDataLen - 1); //can't left shift by a uint, we need to thunk to an int
nData = ((((nData - _mins[nPrefLen - 1]) & (uint)((1 << dataLenMinusOne) - 1)) << 1) | (uint)((data < 0) ? 1 : 0));
// Append data into the bit streamdataLenMinusOne
Debug.Assert(nDataLen <= Int32.MaxValue);
writer.Write(nData, (int)nDataLen);
return (byte)((uint)nPrefLen + nDataLen);
}
/// <summary>
/// Encode
/// </summary>
/// <param name="data"></param>
/// <param name="extra"></param>
/// <param name="writer"></param>
/// <returns>number of bits encoded, 0 for failure</returns>
internal byte Encode(int data, int extra, BitStreamWriter writer)
{
if (writer == null)
{
throw new ArgumentNullException("writer");
}
if (data == 0)
{
writer.Write((byte)0, 1); //more efficent
return((byte)1);
}
// First, encode extra if non-ZERO
uint bitSize = _huffBits.GetSize();
if (0 != extra)
{
// Prefix lenght is 1 more than table size
byte extraPrefixLength = (byte)(bitSize + 1);
int extraPrefix = ((1 << extraPrefixLength) - 2);
writer.Write((uint)extraPrefix, (int)extraPrefixLength);
// Encode the extra data first
byte extraCodeLength = Encode(extra, 0, writer);
// Encode the actual data next
byte dataCodeLength = Encode(data, 0, writer);
// Return the total code lenght
return((byte)((int)extraPrefixLength + (int)extraCodeLength + (int)dataCodeLength));
}
// Find the absolute value of the data
// IMPORTANT : It is extremely important that nData is uint, and NOT int
// If it is int, the LONG_MIN will be encoded erroneaouly
uint nData = (uint)MathHelper.AbsNoThrow(data);
// Find the prefix lenght
byte nPrefLen = 1;
for (; (nPrefLen < bitSize) && (nData >= _mins[nPrefLen]); ++nPrefLen)
{
;
}
// Get the data length
uint nDataLen = _huffBits.GetBitsAtIndex((uint)nPrefLen - 1);
// Find the prefix
int nPrefix = ((1 << nPrefLen) - 2);
// Append the prefix to the bit stream
writer.Write((uint)nPrefix, (int)nPrefLen);
// Find the data offset by lower bound
// and append sign bit at LSB
Debug.Assert(nDataLen > 0 && nDataLen - 1 <= Int32.MaxValue);
int dataLenMinusOne = (int)(nDataLen - 1); //can't left shift by a uint, we need to thunk to an int
nData = ((((nData - _mins[nPrefLen - 1]) & (uint)((1 << dataLenMinusOne) - 1)) << 1) | (uint)((data < 0) ? 1 : 0));
// Append data into the bit streamdataLenMinusOne
Debug.Assert(nDataLen <= Int32.MaxValue);
writer.Write(nData, (int)nDataLen);
return((byte)((uint)nPrefLen + nDataLen));
}
/// <summary>
/// Compress - compress the input[] into compressedData
/// </summary>
/// <param name="bitCount">The count of bits needed for all elements</param>
/// <param name="input">input buffer</param>
/// <param name="startInputIndex">offset into the input buffer</param>
/// <param name="dtxf">data transform. can be null</param>
/// <param name="compressedData">The list of bytes to write the compressed input to</param>
internal void Compress(int bitCount, int[] input, int startInputIndex, DeltaDelta dtxf, List<byte> compressedData)
{
if (null == input || null == compressedData)
{
throw new ArgumentNullException(StrokeCollectionSerializer.ISFDebugMessage("input or compressed data was null in Compress"));
}
if (bitCount < 0)
{
throw new ArgumentOutOfRangeException("bitCount");
}
if (bitCount == 0)
{
//adjust if the bitcount is 0
//(this makes bitCount 32)
bitCount = (int)(Native.SizeOfInt << 3);
}
//have the writer adapt to the List<byte> passed in and write to it
BitStreamWriter writer = new BitStreamWriter(compressedData);
if (null != dtxf)
{
int xfData = 0;
int xfExtra = 0;
for (int i = startInputIndex; i < input.Length; i++)
{
dtxf.Transform(input[i], ref xfData, ref xfExtra);
if (xfExtra != 0)
{
throw new InvalidOperationException(StrokeCollectionSerializer.ISFDebugMessage("Transform returned unexpected results"));
}
writer.Write((uint)xfData, bitCount);
}
}
else
{
for (int i = startInputIndex; i < input.Length; i++)
{
writer.Write((uint)input[i], bitCount);
}
}
}
/// <summary>
/// Uncompress - uncompress the byte[] in the reader to a byte[] to return
/// </summary>
/// <param name="bitCount">number of bits each element is compressed to</param>
/// <param name="reader">a reader over the compressed byte[]</param>
/// <param name="encodingType">int, short or byte?</param>
/// <param name="unitsToDecode">number of logical units to decode</param>
/// <returns>Uncompressed byte[]</returns>
internal byte[] Uncompress(int bitCount, BitStreamReader reader, GorillaEncodingType encodingType, int unitsToDecode)
{
if (null == reader)
{
throw new ArgumentNullException("reader");
}
if (bitCount < 0)
{
throw new ArgumentOutOfRangeException("bitCount");
}
if (unitsToDecode < 0)
{
throw new ArgumentOutOfRangeException("unitsToDecode");
}
int bitsToWrite = 0;
// Test whether the items are signed. For unsigned number, we don't need mask
// If we are trying to compress signed long values with bit count = 5
// The mask will be 1111 1111 1111 0000. The way it is done is, if the 5th
// bit is 1, the number is negative numbe, othrwise it's positive. Testing
// will be non-zero, ONLY if the 5th bit is 1, in which case we OR with the mask
// otherwise we leave the number as it is.
uint bitMask = 0;
//adjust if the bitcount is 0
//(this makes bitCount 32)
switch (encodingType)
{
case GorillaEncodingType.Int:
{
if (bitCount == 0)
{
bitCount = Native.BitsPerInt;
}
bitsToWrite = Native.BitsPerInt;
//we decode int's as unsigned, so we need to create a mask
bitMask = (unchecked ((uint)~0) << (bitCount - 1));
break;
}
case GorillaEncodingType.Short:
{
if (bitCount == 0)
{
bitCount = Native.BitsPerShort;
}
bitsToWrite = Native.BitsPerShort;
//shorts are decoded as unsigned values, no mask required
bitMask = 0;
break;
}
case GorillaEncodingType.Byte:
{
if (bitCount == 0)
{
bitCount = Native.BitsPerByte;
}
bitsToWrite = Native.BitsPerByte;
//bytes are decoded as unsigned values, no mask required
bitMask = 0;
break;
}
default:
{
throw new ArgumentException(StrokeCollectionSerializer.ISFDebugMessage("bogus GorillaEncodingType passed to Uncompress"));
}
}
List <byte> output = new List <byte>((bitsToWrite / 8) * unitsToDecode);
BitStreamWriter writer = new BitStreamWriter(output);
uint bitData = 0;
while (!reader.EndOfStream && unitsToDecode > 0)
{
//we're going to cast to an uint anyway, just read as one
bitData = reader.ReadUInt32(bitCount);
// Construct the item
bitData = ((bitData & bitMask) != 0) ? bitMask | bitData : bitData;
writer.WriteReverse(bitData, bitsToWrite);
unitsToDecode--;
}
return(output.ToArray());
}
/// <summary>
/// Uncompress - uncompress the byte[] in the reader to a byte[] to return
/// </summary>
/// <param name="bitCount">number of bits each element is compressed to</param>
/// <param name="reader">a reader over the compressed byte[]</param>
/// <param name="encodingType">int, short or byte?</param>
/// <param name="unitsToDecode">number of logical units to decode</param>
/// <returns>Uncompressed byte[]</returns>
internal byte[] Uncompress(int bitCount, BitStreamReader reader, GorillaEncodingType encodingType, int unitsToDecode)
{
if (null == reader)
{
throw new ArgumentNullException("reader");
}
if (bitCount < 0)
{
throw new ArgumentOutOfRangeException("bitCount");
}
if (unitsToDecode < 0)
{
throw new ArgumentOutOfRangeException("unitsToDecode");
}
int bitsToWrite = 0;
// Test whether the items are signed. For unsigned number, we don't need mask
// If we are trying to compress signed long values with bit count = 5
// The mask will be 1111 1111 1111 0000. The way it is done is, if the 5th
// bit is 1, the number is negative numbe, othrwise it's positive. Testing
// will be non-zero, ONLY if the 5th bit is 1, in which case we OR with the mask
// otherwise we leave the number as it is.
uint bitMask = 0;
//adjust if the bitcount is 0
//(this makes bitCount 32)
switch (encodingType)
{
case GorillaEncodingType.Int:
{
if (bitCount == 0)
{
bitCount = Native.BitsPerInt;
}
bitsToWrite = Native.BitsPerInt;
//we decode int's as unsigned, so we need to create a mask
bitMask = (unchecked((uint)~0) << (bitCount - 1));
break;
}
case GorillaEncodingType.Short:
{
if (bitCount == 0)
{
bitCount = Native.BitsPerShort;
}
bitsToWrite = Native.BitsPerShort;
//shorts are decoded as unsigned values, no mask required
bitMask = 0;
break;
}
case GorillaEncodingType.Byte:
{
if (bitCount == 0)
{
bitCount = Native.BitsPerByte;
}
bitsToWrite = Native.BitsPerByte;
//bytes are decoded as unsigned values, no mask required
bitMask = 0;
break;
}
default:
{
throw new ArgumentException(StrokeCollectionSerializer.ISFDebugMessage("bogus GorillaEncodingType passed to Uncompress"));
}
}
List<byte> output = new List<byte>((bitsToWrite / 8) * unitsToDecode);
BitStreamWriter writer = new BitStreamWriter(output);
uint bitData = 0;
while (!reader.EndOfStream && unitsToDecode > 0)
{
//we're going to cast to an uint anyway, just read as one
bitData = reader.ReadUInt32(bitCount);
// Construct the item
bitData = ((bitData & bitMask) != 0) ? bitMask | bitData : bitData;
writer.WriteReverse(bitData, bitsToWrite);
unitsToDecode--;
}
return output.ToArray();
}
void SerializeList(
BitStreamWriter writer,
IEnumerable values,
IContract contract,
IContract finalItemContract,
DsdlType derivedDsdlType,
bool tailArrayOptimization)
{
if (!(derivedDsdlType is ArrayDsdlType arrayDsdlType))
{
throw new InvalidOperationException($"Array DSDL type expected for type '{contract.UnderlyingType.FullName}'.");
}
object underlyingList = values is IWrappedCollection wrappedCollection ? wrappedCollection.UnderlyingCollection : values;
_serializeStack.Push(underlyingList);
var arrayCount = values.Count();
switch (arrayDsdlType.Mode)
{
case ArrayDsdlTypeMode.Dynamic:
{
if (arrayCount > arrayDsdlType.MaxSize)
{
throw new SerializationException($"'{contract.UnderlyingType.FullName}' is too big. MaxSize is {arrayDsdlType.MaxSize}.");
}
if (!tailArrayOptimization || arrayDsdlType.ElementType.MinBitlen < 8)
{
WriteDynamicArraySize(writer, arrayCount, arrayDsdlType);
}
else
{
tailArrayOptimization = false;
}
break;
}
case ArrayDsdlTypeMode.Static:
{
if (arrayCount != arrayDsdlType.MaxSize)
{
throw new SerializationException($"'{contract.UnderlyingType.FullName}' expected size is {arrayDsdlType.MaxSize}.");
}
break;
}
}
// Note: an exception from the IEnumerable won't be caught.
int i = 0;
foreach (object value in values)
{
i++;
var valueContract = finalItemContract ??
(value == null ? null : _serializer.ContractResolver.ResolveContract(value.GetType()));
if (!CheckForCircularReference(value, null, valueContract))
{
continue;
}
if (!CheckDsdlTypeCompatibility(arrayDsdlType.ElementType, valueContract))
{
throw new InvalidOperationException(
$"DSDL type mismatch for enumerated item '{contract.UnderlyingType.FullName}.{valueContract.UnderlyingType}'.");
}
var tao = i == arrayCount ? tailArrayOptimization : false;
SerializeValue(writer, value, valueContract, arrayDsdlType.ElementType, tao);
}
//writer.WriteEndArray();
_serializeStack.Pop();
}
