public static Dictionary <int, byte[]> SearchFixup(ILogFileRecord record, byte[] data)
{
var offset_dict = new Dictionary <int, byte[]>();
var offset = record.SectorSize - 2;
var fixup_value = record.Header.FixupValue;
var count = 0;
//start at 510, read 2 bytes, repeat every 512.
for (int x = offset; x < data.Length; x += record.SectorSize)
{
if (ByteExtensions.CompareTo(data, record.Header.FixupValue, x))
{
count += 1;
var start = (x / offset - 1) << 1;
var stop = (x / offset) << 1;
offset_dict[x] = record.Header.FixupArray.SubBytes(x, 2);
}
else
{
LoggerService.WriteCallerLine($"'Data: {data.SubBytes(x,2).BytesToHexString()} at offset {x} is not fixup_value: {fixup_value}");
}
}
return(count == record.SectorAmount?offset_dict:null);
}
/// Replace the fixup values with the actual values from a offset dictionary
/// Uses bytarray as it is mutable and memoryview to adjust the data.
///
/// input:
/// - data (4096 bytes) ~~non writable~~
/// output:
/// - data (4096 bytes) ~~non writable~~
public static void ReplaceFixup(ILogFileRecord record, byte[] data)
{
/// make it writeable through memoryview
foreach (var offset in record.OffsetDict.Keys)
{
///print('offset: %i -> old data: %s' % (offset, hexlify(wdata[offset:offset+2])))
Array.Copy(record.OffsetDict[offset], 0, data, offset, 2);
/// print('offset: %i -> new data: %s' % (offset, hexlify(wdata[offset:offset+2])))
/// make it immutable again
}
}
