internal object ReadField(long dataOffset, Partition.FieldDefinitionEntry field)
{
lock (this._DataLock)
{
this._Data.Position = dataOffset + field.DataOffset;
return(this.ReadData(field.TypeIndex, field.Flags));
}
}
public void Deserialize(Stream input)
{
var basePosition = input.Position;
var magic = input.ReadValueU32(Endian.Little);
if (magic != Signature && magic.Swap() != Signature)
{
throw new FormatException();
}
var endian = magic == Signature ? Endian.Little : Endian.Big;
var headerSize = input.ReadValueU32(endian);
if (basePosition + headerSize > input.Length)
{
throw new EndOfStreamException();
}
var dataSize = input.ReadValueU32(endian);
if (basePosition + headerSize + dataSize > input.Length)
{
throw new EndOfStreamException();
}
var importCount = input.ReadValueU32(endian);
var instanceCount = input.ReadValueU16(endian);
var namedInstanceCount = input.ReadValueU16(endian);
var exportedInstanceCount = input.ReadValueU16(endian);
var typeDefinitionCount = input.ReadValueU16(endian);
var fieldDefinitionCount = input.ReadValueU16(endian);
var nameTableSize = input.ReadValueU16(endian);
var stringTableSize = input.ReadValueU32(endian);
var arrayCount = input.ReadValueU32(endian);
var arrayOffset = input.ReadValueU32(endian);
var guid = input.ReadValueGuid(endian);
input.Seek(8, SeekOrigin.Current);
var computedHeaderSize = 64 +
(importCount * 32) +
nameTableSize +
(fieldDefinitionCount * 16) +
(typeDefinitionCount * 16) +
(instanceCount * 4).Align(16) +
(arrayCount * 12).Align(16);
if (computedHeaderSize != headerSize)
{
throw new FormatException();
}
var importEntries = new Partition.ImportEntry[importCount];
for (int i = 0; i < importCount; i++)
{
importEntries[i] = Partition.ImportEntry.Read(input, endian);
}
var nameTableBytes = input.ReadBytes(nameTableSize);
var names = new List <string>();
using (var data = new MemoryStream(nameTableBytes, false))
{
while (data.Position < data.Length)
{
names.Add(data.ReadStringZ(Encoding.UTF8));
}
}
// TODO(gibbed): do this better.
var hashesToNames = names.Distinct().ToDictionary(Common.Hashing.DJB.Compute, s => s);
var fieldDefinitionEntries = new Partition.FieldDefinitionEntry[fieldDefinitionCount];
for (int i = 0; i < fieldDefinitionCount; i++)
{
var fieldDefinitionEntry =
fieldDefinitionEntries[i] = Partition.FieldDefinitionEntry.Read(input, endian);
if (fieldDefinitionEntry.Flags.UnknownFlags2 != 0)
{
throw new FormatException();
}
fieldDefinitionEntries[i].Name = hashesToNames[fieldDefinitionEntries[i].NameHash];
}
var typeDefinitionEntries = new Partition.TypeDefinitionEntry[typeDefinitionCount];
for (int i = 0; i < typeDefinitionCount; i++)
{
var typeDefinitionEntry =
typeDefinitionEntries[i] = Partition.TypeDefinitionEntry.Read(input, endian);
if (typeDefinitionEntry.Flags.UnknownFlags2 != 0)
{
throw new FormatException();
}
typeDefinitionEntries[i].Name = hashesToNames[typeDefinitionEntries[i].NameHash];
}
var instancePadding = (instanceCount * 4).Padding(16);
var instanceEntries = new Partition.InstanceEntry[instanceCount];
for (int i = 0; i < instanceCount; i++)
{
instanceEntries[i] = Partition.InstanceEntry.Read(input, endian);
}
input.Seek(instancePadding, SeekOrigin.Current);
var arrayPadding = (arrayCount * 12).Padding(16);
var arrayEntries = new Partition.ArrayEntry[arrayCount];
for (int i = 0; i < arrayCount; i++)
{
arrayEntries[i] = Partition.ArrayEntry.Read(input, endian);
}
input.Seek(arrayPadding, SeekOrigin.Current);
if (basePosition + headerSize != input.Position)
{
throw new FormatException();
}
var dataBytes = input.ReadBytes(dataSize);
this._ImportEntries.Clear();
this._FieldDefinitionEntries.Clear();
this._TypeDefinitionEntries.Clear();
this._InstanceEntries.Clear();
this._ArrayEntries.Clear();
this._Endian = endian;
this._Guid = guid;
this._ImportEntries.AddRange(importEntries);
this._NameTableBytes = nameTableBytes;
this._FieldDefinitionEntries.AddRange(fieldDefinitionEntries);
this._TypeDefinitionEntries.AddRange(typeDefinitionEntries);
this._InstanceEntries.AddRange(instanceEntries);
this._ArrayEntries.AddRange(arrayEntries);
this._NamedInstanceCount = namedInstanceCount;
this._ExportedInstanceCount = exportedInstanceCount;
this._StringTableSize = stringTableSize;
this._ArrayOffset = arrayOffset;
this._DataBytes = dataBytes;
}
