public IEnumerable <FfuFileBlock> EnumerateBlocks()
{
var block = new byte[_file.BlockSizeInBytes];
for (int i = 0; i < _descriptors.Count; i++)
{
// move to block #i
_file.SeekBegin(PayloadPosition + i * _file.BlockSizeInBytes);
if (!_file.TryRead(block))
{
throw new InvalidDataException();
}
var desc = _descriptors[i];
foreach (var location in desc.Locations)
{
var bl = new FfuFileBlock
{
DescriptorIndex = i,
Data = block
};
switch (location.dwDiskAccessMethod)
{
case FfuFile.DISK_ACCESS_METHOD.DISK_BEGIN:
bl.TargetSeekOrigin = SeekOrigin.Begin;
bl.TargetSeekOffset = location.dwBlockIndex * (long)_file.BlockSizeInBytes;
break;
case FfuFile.DISK_ACCESS_METHOD.DISK_END:
bl.TargetSeekOrigin = SeekOrigin.End;
bl.TargetSeekOffset = -((location.dwBlockIndex + 1) * (long)_file.BlockSizeInBytes);
break;
default:
throw new NotSupportedException();
}
yield return(bl);
}
}
}
private void OnProgressChanged(FfuFileBlock block)
{
ProgressChanged?.Invoke(this, new ProgressChangedEventArgs((100 * block.DescriptorIndex) / _descriptors.Count, block));
}
