public static EFI_LOAD_OPTION GetLoadOption(ushort optionId)
{
byte[] buffer = null;
uint length = ReadVariable(string.Format(LOAD_OPTION_FORMAT, optionId), ref buffer);
return(EFI_LOAD_OPTION.ConvertOption(buffer, (int)length));
}
public static EFI_LOAD_OPTION ConvertOption(byte[] data, int lenght)
{
EFI_LOAD_OPTION LoadOption = new EFI_LOAD_OPTION();
using (BinaryReader reader = new BinaryReader(new MemoryStream(data, 0, lenght))) {
while (reader.BaseStream.Position != reader.BaseStream.Length) {
LoadOption.Attributes = reader.ReadUInt32();
LoadOption.FilePathListLength = reader.ReadUInt16();
StringBuilder builder = new StringBuilder();
while (true) {
ushort chr = reader.ReadUInt16();
if (chr == 0) {
break;
}
builder.Append(Convert.ToChar(chr));
}
LoadOption.Description = builder.ToString();
LoadOption.FilePathList = EFI_DEVICE_PATH_PROTOCOL.ReadList(reader);
// Manually seek to optional data position because EFI_DEVICE_PATH_PROTOCOL sequence not always property aligned
reader.BaseStream.Seek(sizeof(UInt32) + sizeof(UInt16) + (LoadOption.Description.Length + 1) * sizeof(UInt16) + LoadOption.FilePathListLength, SeekOrigin.Begin);
LoadOption.OptionalData = reader.ReadBytes((int)(lenght - reader.BaseStream.Position));
}
}
return LoadOption;
}
public static EFI_LOAD_OPTION ConvertOption(byte[] data, int lenght)
{
EFI_LOAD_OPTION LoadOption = new EFI_LOAD_OPTION();
using (BinaryReader reader = new BinaryReader(new MemoryStream(data, 0, lenght))) {
while (reader.BaseStream.Position != reader.BaseStream.Length)
{
LoadOption.Attributes = reader.ReadUInt32();
LoadOption.FilePathListLength = reader.ReadUInt16();
StringBuilder builder = new StringBuilder();
while (true)
{
ushort chr = reader.ReadUInt16();
if (chr == 0)
{
break;
}
builder.Append(Convert.ToChar(chr));
}
LoadOption.Description = builder.ToString();
LoadOption.FilePathList = EFI_DEVICE_PATH_PROTOCOL.ReadList(reader);
// Manually seek to optional data position because EFI_DEVICE_PATH_PROTOCOL sequence not always property aligned
reader.BaseStream.Seek(sizeof(UInt32) + sizeof(UInt16) + (LoadOption.Description.Length + 1) * sizeof(UInt16) + LoadOption.FilePathListLength, SeekOrigin.Begin);
LoadOption.OptionalData = reader.ReadBytes((int)(lenght - reader.BaseStream.Position));
}
}
return(LoadOption);
}
public static List <BootEntry> GetEntries()
{
byte[] buffer = null;
uint length = ReadVariable(EFI_BOOT_ORDER, ref buffer);
List <BootEntry> entries = new List <BootEntry>();
ushort currentEntryId = GetBootCurrent();
ushort nextEntryId = GetBootNext();
using (BinaryReader reader = new BinaryReader(new MemoryStream(buffer, 0, (int)length))) {
while (reader.BaseStream.Position != reader.BaseStream.Length)
{
ushort optionId = reader.ReadUInt16();
EFI_LOAD_OPTION LoadOption = GetLoadOption(optionId);
entries.Add(new BootEntry()
{
Id = optionId,
LoadOption = LoadOption,
IsCurrent = currentEntryId == optionId,
IsBootNext = nextEntryId == optionId
});
}
}
return(entries);
}
