private void Build()
{
const uint Magic = 0x46485845; // EXHF
const int MinimumLength = 0x2E;
const int FixedSizeDataLengthOffset = 0x06;
const int VariantOffset = 0x10;
const int DataOffset = 0x20;
byte[] buffer = File.GetData();
if (buffer.Length < MinimumLength)
{
throw new InvalidDataException("EXH file is too short");
}
if (OrderedBitConverter.ToUInt32(buffer, 0, false) != Magic)
{
throw new InvalidDataException("File not a EX header");
}
FixedSizeDataLength = OrderedBitConverter.ToUInt16(buffer, FixedSizeDataLengthOffset, true);
Variant = OrderedBitConverter.ToUInt16(buffer, VariantOffset, true);
if (Variant != 1 && Variant != 2)
{
throw new NotSupportedException();
}
int currentPosition = DataOffset;
ReadColumns(buffer, ref currentPosition);
ReadPartialFiles(buffer, ref currentPosition);
ReadSuffixes(buffer, ref currentPosition);
}
public Header(ExCollection collection, string name, File file)
{
Collection = collection;
Name = name;
File = file;
Build();
}
public Header(ExCollection collection, string name, File file)
{
Collection = collection;
Name = name;
File = file;
Build();
}
