public void testDecodeUInt32()
{
Assert.AreEqual(0L, NB.decodeUInt32(b(0, 0, 0, 0), 0));
Assert.AreEqual(0L, NB.decodeUInt32(Padb(3, 0, 0, 0, 0), 3));
Assert.AreEqual(3L, NB.decodeUInt32(b(0, 0, 0, 3), 0));
Assert.AreEqual(3L, NB.decodeUInt32(Padb(3, 0, 0, 0, 3), 3));
Assert.AreEqual(0xdeadbeefL, NB.decodeUInt32(b(0xde, 0xad, 0xbe, 0xef), 0));
Assert.AreEqual(0xdeadbeefL, NB.decodeUInt32(Padb(3, 0xde, 0xad, 0xbe,
0xef), 3));
Assert.AreEqual(0x0310adefL, NB.decodeUInt32(b(0x03, 0x10, 0xad, 0xef), 0));
Assert.AreEqual(0x0310adefL, NB.decodeUInt32(Padb(3, 0x03, 0x10, 0xad,
0xef), 3));
Assert.AreEqual(0xffffffffL, NB.decodeUInt32(b(0xff, 0xff, 0xff, 0xff), 0));
Assert.AreEqual(0xffffffffL, NB.decodeUInt32(Padb(3, 0xff, 0xff, 0xff,
0xff), 3));
}
private void ReadPackHeader()
{
int hdrln = Constants.PACK_SIGNATURE.Length + 4 + 4;
int p = FillFromInput(hdrln);
for (int k = 0; k < Constants.PACK_SIGNATURE.Length; k++)
{
if (_buffer[p + k] != Constants.PACK_SIGNATURE[k])
{
throw new IOException("Not a PACK file.");
}
}
long vers = NB.DecodeUInt32(_buffer, p + 4);
if (vers != 2 && vers != 3)
{
throw new IOException("Unsupported pack version " + vers + ".");
}
_objectCount = NB.decodeUInt32(_buffer, p + 8);
Use(hdrln);
}
private void OnOpenPack()
{
PackIndex idx = LoadPackIndex();
var buf = new byte[20];
IO.ReadFully(_fd, 0, buf, 0, 12);
if (RawParseUtils.match(buf, 0, Constants.PACK_SIGNATURE) != 4)
{
throw new IOException("Not a PACK file.");
}
long vers = NB.decodeUInt32(buf, 4);
long packCnt = NB.decodeUInt32(buf, 8);
if (vers != 2 && vers != 3)
{
throw new IOException("Unsupported pack version " + vers + ".");
}
if (packCnt != idx.ObjectCount)
{
throw new PackMismatchException("Pack object count mismatch:"
+ " pack " + packCnt
+ " index " + idx.ObjectCount
+ ": " + File.FullName);
}
IO.ReadFully(_fd, Length - 20, buf, 0, 20);
if (!buf.SequenceEqual(_packChecksum))
{
throw new PackMismatchException("Pack checksum mismatch:"
+ " pack " + ObjectId.FromRaw(buf)
+ " index " + ObjectId.FromRaw(idx.PackChecksum)
+ ": " + File.FullName);
}
}
public PackIndexV1(Stream fd, byte[] hdr)
{
byte[] fanoutTable = new byte[IdxHdrLen];
Array.Copy(hdr, 0, fanoutTable, 0, hdr.Length);
IO.ReadFully(fd, fanoutTable, hdr.Length, IdxHdrLen - hdr.Length);
_idxHeader = new long[256];
for (int k = 0; k < _idxHeader.Length; k++)
{
_idxHeader[k] = NB.decodeUInt32(fanoutTable, k * 4);
}
_idxdata = new byte[_idxHeader.Length][];
for (int k = 0; k < _idxHeader.Length; k++)
{
uint n;
if (k == 0)
{
n = (uint)(_idxHeader[k]);
}
else
{
n = (uint)(_idxHeader[k] - _idxHeader[k - 1]);
}
if (n > 0)
{
_idxdata[k] = new byte[n * (Constants.OBJECT_ID_LENGTH + 4)];
IO.ReadFully(fd, _idxdata[k], 0, _idxdata[k].Length);
}
}
ObjectCount = _idxHeader[255];
PackChecksum = new byte[20];
IO.ReadFully(fd, PackChecksum, 0, PackChecksum.Length);
/*var fanoutTable = new byte[IDX_HDR_LEN];
* Array.Copy(hdr, 0, fanoutTable, 0, hdr.Length);
* NB.ReadFully(fd, fanoutTable, hdr.Length, IDX_HDR_LEN - hdr.Length);
*
* idxHeader = new long[256]; // really unsigned 32-bit...
* for (int k = 0; k < idxHeader.Length; k++)
* idxHeader[k] = NB.DecodeUInt32(fanoutTable, k * 4);
* idxdata = new byte[idxHeader.Length][];
* for (int k = 0; k < idxHeader.Length; k++)
* {
* _idxHeader[k] = NB.DecodeUInt32(fanoutTable, k * 4);
* }
*
* _idxdata = new byte[_idxHeader.Length][];
* for (int k = 0; k < _idxHeader.Length; k++)
* {
* int n;
* if (k == 0)
* {
* n = (int)(_idxHeader[k]);
* }
* else
* {
* n = (int)(_idxHeader[k] - _idxHeader[k - 1]);
* }
*
* if (n <= 0) continue;
*
* _idxdata[k] = new byte[n * (AnyObjectId.ObjectIdLength + 4)];
* NB.ReadFully(fd, _idxdata[k], 0, _idxdata[k].Length);
* }
*
* ObjectCount = _idxHeader[255];
*
* _packChecksum = new byte[20];
* NB.ReadFully(fd, _packChecksum, 0, _packChecksum.Length);
* */
}
internal long ReadUInt32()
{
ReadFully(_intbuf, 0, 4);
return(NB.decodeUInt32(_intbuf, 0));
}
private void ReadFrom(Stream inStream)
{
var @in = new StreamReader(inStream);
MessageDigest md = Constants.newMessageDigest();
// Read the index header and verify we understand it.
//
var hdr = new byte[20];
IO.ReadFully(inStream, hdr, 0, 12);
md.Update(hdr, 0, 12);
if (!IsDIRC(hdr))
{
throw new CorruptObjectException("Not a DIRC file.");
}
int ver = NB.DecodeInt32(hdr, 4);
if (ver != 2)
{
throw new CorruptObjectException("Unknown DIRC version " + ver);
}
_entryCnt = NB.DecodeInt32(hdr, 8);
if (_entryCnt < 0)
{
throw new CorruptObjectException("DIRC has too many entries.");
}
// Load the individual file entries.
//
var infos = new byte[InfoLen * _entryCnt];
_sortedEntries = new DirCacheEntry[_entryCnt];
for (int i = 0; i < _entryCnt; i++)
{
_sortedEntries[i] = new DirCacheEntry(infos, i * InfoLen, inStream, md);
}
_lastModified = _liveFile.lastModified();
// After the file entries are index extensions, and then a footer.
//
while (true)
{
var pos = inStream.Position;
IO.ReadFully(inStream, hdr, 0, 20);
if (inStream.ReadByte() < 0)
{
// No extensions present; the file ended where we expected.
//
break;
}
inStream.Seek(pos, SeekOrigin.Begin);
md.Update(hdr, 0, 8);
IO.skipFully(inStream, 8);
long sz = NB.decodeUInt32(hdr, 4);
switch (NB.DecodeInt32(hdr, 0))
{
case ExtTree:
if (int.MaxValue < sz)
{
throw new CorruptObjectException("DIRC extension "
+ formatExtensionName(hdr) + " is too large at "
+ sz + " bytes.");
}
byte[] raw = new byte[(int)sz];
IO.ReadFully(inStream, raw, 0, raw.Length);
md.Update(raw, 0, raw.Length);
_cacheTree = new DirCacheTree(raw, new MutableInteger(), null);
break;
default:
if (hdr[0] >= (byte)'A' && hdr[0] <= (byte)'Z')
{
// The extension is optional and is here only as
// a performance optimization. Since we do not
// understand it, we can safely skip past it, after
// we include its data in our checksum.
//
skipOptionalExtension(inStream, md, hdr, sz);
}
else
{
// The extension is not an optimization and is
// _required_ to understand this index format.
// Since we did not trap it above we must abort.
//
throw new CorruptObjectException("DIRC extension "
+ formatExtensionName(hdr)
+ " not supported by this version.");
}
break;
}
}
byte[] exp = md.Digest();
if (!exp.SequenceEqual(hdr))
{
throw new CorruptObjectException("DIRC checksum mismatch");
}
}