// Reads an array, decompressing it if required
Array ReadArray(ReadPrimitive readPrimitive, Type arrayType)
{
var len = stream.ReadInt32();
var encoding = stream.ReadInt32();
var compressedLen = stream.ReadInt32();
var ret = Array.CreateInstance(arrayType, len);
var s = stream;
var endPos = stream.BaseStream.Position + compressedLen;
if (encoding != 0)
{
if(errorLevel >= ErrorLevel.Checked)
{
if(encoding != 1)
throw new FbxException(stream.BaseStream.Position - 1,
"Invalid compression encoding (must be 0 or 1)");
var cmf = stream.ReadByte();
if((cmf & 0xF) != 8 || (cmf >> 4) > 7)
throw new FbxException(stream.BaseStream.Position - 1,
"Invalid compression format " + cmf);
var flg = stream.ReadByte();
if(errorLevel >= ErrorLevel.Strict && ((cmf << 8) + flg) % 31 != 0)
throw new FbxException(stream.BaseStream.Position - 1,
"Invalid compression FCHECK");
if((flg & (1 << 5)) != 0)
throw new FbxException(stream.BaseStream.Position - 1,
"Invalid compression flags; dictionary not supported");
} else
{
stream.BaseStream.Position += 2;
}
var codec = new DeflateWithChecksum(stream.BaseStream, CompressionMode.Decompress);
s = new BinaryReader(codec);
}
try
{
for (int i = 0; i < len; i++)
ret.SetValue(readPrimitive(s), i);
}
catch (InvalidDataException)
{
throw new FbxException(stream.BaseStream.Position - 1,
"Compressed data was malformed");
}
if (encoding != 0)
{
if (errorLevel >= ErrorLevel.Checked)
{
stream.BaseStream.Position = endPos - sizeof(int);
var checksumBytes = new byte[sizeof(int)];
stream.BaseStream.Read(checksumBytes, 0, checksumBytes.Length);
int checksum = 0;
for (int i = 0; i < checksumBytes.Length; i++)
checksum = (checksum << 8) + checksumBytes[i];
if(checksum != ((DeflateWithChecksum)s.BaseStream).Checksum)
throw new FbxException(stream.BaseStream.Position,
"Compressed data has invalid checksum");
}
else
{
stream.BaseStream.Position = endPos;
}
}
return ret;
}
// Reads an array, decompressing it if required
public Array ReadArray(ReadPrimitive readPrimitive, Type arrayType)
{
var len = binStream.ReadInt32();
var encoding = binStream.ReadInt32();
var compressedLen = binStream.ReadInt32();
var ret = Array.CreateInstance(arrayType, len);
var s = binStream;
var endPos = binStream.BaseStream.Position + compressedLen;
if (encoding != 0)
{
if (errorLevel >= ErrorLevel.Checked)
{
if (encoding != 1)
{
throw new FbxException(binStream.BaseStream.Position - 1,
"Invalid compression encoding (must be 0 or 1)");
}
var cmf = binStream.ReadByte();
if ((cmf & 0xF) != 8 || (cmf >> 4) > 7)
{
throw new FbxException(binStream.BaseStream.Position - 1,
"Invalid compression format " + cmf);
}
var flg = binStream.ReadByte();
if (errorLevel >= ErrorLevel.Strict && ((cmf << 8) + flg) % 31 != 0)
{
throw new FbxException(binStream.BaseStream.Position - 1,
"Invalid compression FCHECK");
}
if ((flg & (1 << 5)) != 0)
{
throw new FbxException(binStream.BaseStream.Position - 1,
"Invalid compression flags; dictionary not supported");
}
}
else
{
binStream.BaseStream.Position += 2;
}
var codec = new DeflateWithChecksum(binStream.BaseStream, CompressionMode.Decompress);
s = new BinaryReader(codec);
}
try
{
for (int i = 0; i < len; i++)
{
ret.SetValue(readPrimitive(s), i);
}
}
catch (FbxException) //InvalidDataException
{
throw new FbxException(binStream.BaseStream.Position - 1,
"Compressed data was malformed");
}
if (encoding != 0)
{
if (errorLevel >= ErrorLevel.Checked)
{
binStream.BaseStream.Position = endPos - sizeof(int);
var checksumBytes = new byte[sizeof(int)];
binStream.BaseStream.Read(checksumBytes, 0, checksumBytes.Length);
int checksum = 0;
for (int i = 0; i < checksumBytes.Length; i++)
{
checksum = (checksum << 8) + checksumBytes[i];
}
if (checksum != ((DeflateWithChecksum)s.BaseStream).Checksum)
{
throw new FbxException(binStream.BaseStream.Position,
"Compressed data has invalid checksum");
}
}
else
{
binStream.BaseStream.Position = endPos;
}
}
return(ret);
}
// Reads an array, decompressing it if required
T[] ReadArray <T>(ReadPrimitive readPrimitive)
{
var len = stream.ReadInt32();
var encoding = stream.ReadInt32();
var compressedLen = stream.ReadInt32();
var ret = new T[len];
var s = stream;
var endPos = stream.BaseStream.Position + compressedLen;
if (encoding == 0)
{
for (int i = 0; i < len; i++)
{
ret[i] = (T)readPrimitive(s);
}
return(ret);
}
if (errorLevel >= ErrorLevel.Checked)
{
if (encoding != 1)
{
throw new FbxException(stream.BaseStream.Position - 1,
"Invalid compression encoding (must be 0 or 1)");
}
var cmf = stream.ReadByte();
if ((cmf & 0xF) != 8 || (cmf >> 4) > 7)
{
throw new FbxException(stream.BaseStream.Position - 1,
"Invalid compression format " + cmf);
}
var flg = stream.ReadByte();
if (errorLevel >= ErrorLevel.Strict && ((cmf << 8) + flg) % 31 != 0)
{
throw new FbxException(stream.BaseStream.Position - 1,
"Invalid compression FCHECK");
}
if ((flg & (1 << 5)) != 0)
{
throw new FbxException(stream.BaseStream.Position - 1,
"Invalid compression flags; dictionary not supported");
}
}
else
{
stream.BaseStream.Position += 2;
}
using (var codec = new DeflateStream(stream.BaseStream, CompressionMode.Decompress, true))
using (var bs = new ChecksumBinaryReader(codec))
{
try
{
for (int i = 0; i < len; i++)
{
ret[i] = (T)readPrimitive(bs);
}
}
catch (InvalidDataException)
{
throw new FbxException(stream.BaseStream.Position - 1, "Compressed data was malformed");
}
if (errorLevel >= ErrorLevel.Checked)
{
stream.BaseStream.Position = endPos - sizeof(int);
var checksumBytes = new byte[sizeof(int)];
stream.BaseStream.Read(checksumBytes, 0, checksumBytes.Length);
uint checksum = 0;
for (int i = 0; i < checksumBytes.Length; i++)
{
checksum = (checksum << 8) + checksumBytes[i];
}
if (checksum != bs.Checksum)
{
throw new FbxException(stream.BaseStream.Position, "Compressed data has invalid checksum");
}
}
else
{
stream.BaseStream.Position = endPos;
}
}
return(ret);
}