private PropertyContext CreatePropertyContext(long position, int count, int size, PropertyType type, object value)
{
#if TRACE_BINARYPROPERTYLISTREADER
Trace.TraceInformation("position:{0:x4},type:{1},value:{2}", position, type, value);
#endif
var result = new PropertyContext(position, count, size, type, value);
return(result);
}
public static object LoadFrom(this BinaryPropertyListReader item, Stream stream)
{
PropertyContext result = default;
using (var reader = new BinaryReader(stream))
{
result = item.LoadFrom(reader);
}
return(result.Value);
}
internal PropertyContext LoadFrom(BinaryReader reader)
{
PropertyContext result = default;
if (reader.BaseStream.Length >= MinimumViableFileSize)
{
var context = new PropertyListContext()
.HeaderFromBinaryReader(reader);
if (context.IsSupportedBinaryPropertyList())
{
context = context.TrailerFromBinaryReader(reader)
.OffsetTableFromBinaryReader(reader);
result = ParseObjectByOffsetIndex(reader, context, (int)context.TopObjectOffset);
}
}
return(result);
}
private PropertyContext ParseObject(BinaryReader reader, PropertyListContext ctx, long position)
{
PropertyContext result;
var marker = reader.ReadByte();
var msn = marker & 0xf0;
var lsn = marker & 0x0f;
switch (msn)
{
case 0b0000_0000:
switch (lsn)
{
case 0b0000_0000:
result = new PropertyContext(position, 0, 1, PropertyType.Null, null);
break;
case 0b0000_1000:
result = new PropertyContext(position, 0, 1, PropertyType.Bool, false);
break;
case 0b0000_1001:
result = new PropertyContext(position, 0, 1, PropertyType.Bool, true);
break;
case 0b0000_1111:
result = new PropertyContext(position, 0, 1, PropertyType.Fill, null);
break;
default:
throw new InvalidDataException("Unrecognised object type " + marker.ToString("x2"));
}
break;
case 0b0001_0000:
result = ReadInteger(reader, position, lsn);
break;
case 0b0010_0000:
result = ReadReal(reader, position, lsn);
break;
case 0b0011_0000:
result = ReadDate(reader, position, lsn);
break;
case 0b0100_0000:
result = ReadData(reader, position, lsn);
break;
case 0b0101_0000:
result = ReadAsciiString(reader, position, lsn);
break;
case 0b0110_0000:
result = ReadUnicodeString(reader, position, lsn);
break;
case 0b1000_0000:
result = ReadUid(reader, position, lsn);
break;
case 0b1010_0000:
result = ReadArray(reader, ctx, position, lsn);
break;
case 0b1100_0000:
result = ReadSet(reader, ctx, position, lsn);
break;
case 0b1101_0000:
result = ReadDictionary(reader, ctx, position, lsn);
break;
default:
throw new InvalidDataException("Unrecognised object type " + marker.ToString("x2"));
}
return(result);
}
