/// <exception cref="System.IO.IOException"></exception>
internal override ICollection <CachedPack> GetCachedPacks()
{
ObjectDirectory.CachedPackList list = cachedPacks.Get();
if (list == null || list.snapshot.IsModified(cachedPacksFile))
{
list = ScanCachedPacks(list);
}
ICollection <CachedPack> result = list.GetCachedPacks();
bool resultIsCopy = false;
foreach (FileObjectDatabase.AlternateHandle h in MyAlternates())
{
ICollection <CachedPack> altPacks = h.GetCachedPacks();
if (altPacks.IsEmpty())
{
continue;
}
if (result.IsEmpty())
{
result = altPacks;
continue;
}
if (!resultIsCopy)
{
result = new AList <CachedPack>(result);
resultIsCopy = true;
}
Sharpen.Collections.AddAll(result, altPacks);
}
return(result);
}
/// <exception cref="System.IO.IOException"></exception>
private ObjectDirectory.CachedPackList ScanCachedPacks(ObjectDirectory.CachedPackList
old)
{
FileSnapshot s = FileSnapshot.Save(cachedPacksFile);
byte[] buf;
try
{
buf = IOUtil.ReadFully(cachedPacksFile);
}
catch (FileNotFoundException)
{
buf = new byte[0];
}
if (old != null && old.snapshot.Equals(s) && Arrays.Equals(old.raw, buf))
{
old.snapshot.SetClean(s);
return(old);
}
AList <LocalCachedPack> list = new AList <LocalCachedPack>(4);
ICollection <ObjectId> tips = new HashSet <ObjectId>();
int ptr = 0;
while (ptr < buf.Length)
{
if (buf[ptr] == '#' || buf[ptr] == '\n')
{
ptr = RawParseUtils.NextLF(buf, ptr);
continue;
}
if (buf[ptr] == '+')
{
tips.AddItem(ObjectId.FromString(buf, ptr + 2));
ptr = RawParseUtils.NextLF(buf, ptr + 2);
continue;
}
IList <string> names = new AList <string>(4);
while (ptr < buf.Length && buf[ptr] == 'P')
{
int end = RawParseUtils.NextLF(buf, ptr);
if (buf[end - 1] == '\n')
{
end--;
}
names.AddItem(RawParseUtils.Decode(buf, ptr + 2, end));
ptr = RawParseUtils.NextLF(buf, end);
}
if (!tips.IsEmpty() && !names.IsEmpty())
{
list.AddItem(new LocalCachedPack(this, tips, names));
tips = new HashSet <ObjectId>();
}
}
list.TrimToSize();
return(new ObjectDirectory.CachedPackList(s, Sharpen.Collections.UnmodifiableList
(list), buf));
}