public static MemoryStream ExtractFile(this OdiFileEntry entry, BinaryReader reader, List <OdiFileEntry> entryList)
{
var records = entryList
.Where(e => e.FileName == entry.FileName)
.OrderBy(e => e.RecNo)
.ToArray();
List <byte> data = new();
foreach (OdiFileEntry record in records)
{
for (int i = 0; i < record.Extent.Length; i++)
{
if (record.Extent[i] == 0)
{
break;
}
long offset = ext_offset(record.Extent[i]);
reader.BaseStream.Position = offset;
var size = entry.ExtSize;
for (int n = 0; n < 16; n++)
{
reader.BaseStream.Position = offset + n * EXT_SIZE;
data.AddRange(reader.ReadBytes(EXT_SIZE));
if (--size == 0)
{
break;
}
}
}
}
return(new MemoryStream(data.ToArray()));
}
public static void LoadFileInfo(this List <OdiFileEntry> list, BinaryReader reader)
{
for (int i = 0; i < DIR_ENTRY; i++)
{
var item = new OdiFileEntry(reader);
if (item.User == 0xE5)
{
break;
}
list.Add(item);
}
}
public static void ExtractFile(this OdiFileEntry entry, BinaryReader reader, List <OdiFileEntry> entryList, string path, bool tranc)
{
var fileName = Path.Combine(path, entry.FileName);
using (var fileMemory = entry.ExtractFile(reader, entryList))
File.WriteAllBytes(fileName, fileMemory.ToArray());
string ext = Path.GetExtension(entry.FileName).ToUpper();
if (tranc && (ext == ".BRU" || ext == ".ORD"))
{
ushort size;
using (var fileStream = File.Open(fileName, FileMode.Open, FileAccess.ReadWrite))
using (var fileReader = new BinaryReader(fileStream))
{
fileStream.Seek(10, SeekOrigin.Begin);
size = (ushort)(fileReader.ReadUInt16() + 16);
fileStream.SetLength(size);
}
}
}
