private int GetPartitionOffset(int index)
{
bool found = false;
int entriesSoFar = 0;
int position = 0;
while (!found && position < _primaryHeader.PartitionEntryCount)
{
GptEntry entry = new GptEntry();
entry.ReadFrom(_entryBuffer, position * _primaryHeader.PartitionEntrySize);
if (entry.PartitionType != Guid.Empty)
{
if (index == entriesSoFar)
{
found = true;
break;
}
entriesSoFar++;
}
position++;
}
if (found)
{
return(position * _primaryHeader.PartitionEntrySize);
}
else
{
throw new IOException(string.Format(CultureInfo.InvariantCulture, "No such partition: {0}", index));
}
}
private IEnumerable <GptEntry> GetAllEntries()
{
for (int i = 0; i < _primaryHeader.PartitionEntryCount; ++i)
{
GptEntry entry = new GptEntry();
entry.ReadFrom(_entryBuffer, i * _primaryHeader.PartitionEntrySize);
if (entry.PartitionType != Guid.Empty)
{
yield return(entry);
}
}
}
private int GetFreeEntryOffset()
{
for (int i = 0; i < _primaryHeader.PartitionEntryCount; ++i)
{
GptEntry entry = new GptEntry();
entry.ReadFrom(_entryBuffer, i * _primaryHeader.PartitionEntrySize);
if (entry.PartitionType == Guid.Empty)
{
return(i * _primaryHeader.PartitionEntrySize);
}
}
throw new IOException("No free partition entries available");
}
private int GetEntryIndex(Guid identity)
{
int index = 0;
for (int i = 0; i < _primaryHeader.PartitionEntryCount; ++i)
{
GptEntry entry = new GptEntry();
entry.ReadFrom(_entryBuffer, i * _primaryHeader.PartitionEntrySize);
if (entry.Identity == identity)
{
return(index);
}
else if (entry.PartitionType != Guid.Empty)
{
index++;
}
}
throw new IOException("No such partition");
}