private void VerifyPack()
{
using (GitPackReader reader = new GitPackReader(File.OpenRead(Path)))
{
string header;
int version, numberOfObjects;
header = reader.ReadBytes(4).GetString();
version = reader.ReadBytes(4).Sum(b => b);
numberOfObjects = reader.ReadBytes(4).Sum(b => b);
if (Version != version)
{
throw new PackFileException(String.Format("Bad version number {0}. Was expecting {1}", version, Version), Path);
}
if (HEADER != header)
{
throw new PackFileException("Invalid header for pack-file. Needs to be: 'PACK'", Path);
}
}
}
private void Load()
{
string magicNumber;
int version;
using (GitPackReader reader = new GitPackReader(File.OpenRead(Path)))
{
magicNumber = reader.ReadBytes(4).GetString();
version = reader.ReadBytes(4).Sum(b => b);
if (Version != version)
{
throw new PackFileException(String.Format("Bad version number {0}. Was expecting {1}", version, Version), Path);
}
if (MAGIC_NUMBER != magicNumber)
{
throw new PackFileException("Invalid header for pack-file. Needs to be: 'PACK'", Path);
}
#region Fanout Table
fanout = new int[FANOUT];
shas = new int[FANOUT][];
offsets = new byte[FANOUT][];
crcs = new byte[FANOUT][];
// one big read, faster as 256 small 4 byte read statements ?
byte[] fanoutRaw = new byte[FANOUT * 4];
fanoutRaw = reader.ReadBytes(FANOUT * 4);
for (int idx = 0; idx < FANOUT; idx++)
{
fanout[idx] = System.Net.IPAddress.HostToNetworkOrder(BitConverter.ToInt32(fanoutRaw, idx * 4));
}
#endregion
NumberOfObjects = fanout[FANOUT - 1];
#region SHA's
for (int idx = 0; idx < FANOUT; idx++)
{
int bucketCount;
if (idx == 0)
{
bucketCount = fanout[idx];
}
else
{
bucketCount = fanout[idx] - fanout[idx - 1];
}
if (bucketCount == 0)
{
shas[idx] = new int[] { };
crcs[idx] = new byte[] { };
offsets[idx] = new byte[] { };
continue;
}
int recordLength = bucketCount * 20;
int[] bin = new int[recordLength >> 2];
byte[] rawRecord = reader.ReadBytes(recordLength);
for (int i = 0; i < bin.Length; i++)
{
bin[i] = System.Net.IPAddress.HostToNetworkOrder(BitConverter.ToInt32(rawRecord, i << 2));
}
shas[idx] = bin;
offsets[idx] = new byte[bucketCount * 4];
crcs[idx] = new byte[bucketCount * 4];
}
#endregion
#region CRC32
for (int idx = 0; idx < FANOUT; idx++)
{
crcs[idx] = reader.ReadBytes(crcs[idx].Length);
}
#endregion
#region 32 bit offset table
for (int idx = 0; idx < FANOUT; idx++)
{
offsets[idx] = reader.ReadBytes(offsets[idx].Length);
}
#endregion
// TODO: Support 64 bit tables
string packChecksum = reader.ReadBytes(20).GetString();
string idxChecksum = reader.ReadBytes(20).GetString();
}
}
private void Load()
{
string magicNumber;
int version;
using (GitPackReader reader = new GitPackReader(File.OpenRead(Path)))
{
magicNumber = reader.ReadBytes(4).GetString();
version = reader.ReadBytes(4).Sum(b => b);
if (Version != version)
throw new PackFileException(String.Format("Bad version number {0}. Was expecting {1}", version, Version), Path);
if (MAGIC_NUMBER != magicNumber)
throw new PackFileException("Invalid header for pack-file. Needs to be: 'PACK'", Path);
#region Fanout Table
fanout = new int[FANOUT];
shas = new int[FANOUT][];
offsets = new byte[FANOUT][];
crcs = new byte[FANOUT][];
// one big read, faster as 256 small 4 byte read statements ?
byte[] fanoutRaw = new byte[FANOUT * 4];
fanoutRaw = reader.ReadBytes(FANOUT * 4);
for (int idx = 0; idx < FANOUT; idx++)
fanout[idx] = System.Net.IPAddress.HostToNetworkOrder(BitConverter.ToInt32(fanoutRaw, idx * 4));
#endregion
NumberOfObjects = fanout[FANOUT - 1];
#region SHA's
for (int idx = 0; idx < FANOUT; idx++)
{
int bucketCount;
if (idx == 0)
bucketCount = fanout[idx];
else
bucketCount = fanout[idx] - fanout[idx - 1];
if (bucketCount == 0)
{
shas[idx] = new int[] { };
crcs[idx] = new byte[] { };
offsets[idx] = new byte[] { };
continue;
}
int recordLength = bucketCount * 20;
int[] bin = new int[recordLength >> 2];
byte[] rawRecord = reader.ReadBytes(recordLength);
for (int i = 0; i < bin.Length; i++)
{
bin[i] = System.Net.IPAddress.HostToNetworkOrder(BitConverter.ToInt32(rawRecord, i << 2));
}
shas[idx] = bin;
offsets[idx] = new byte[bucketCount * 4];
crcs[idx] = new byte[bucketCount * 4];
}
#endregion
#region CRC32
for (int idx = 0; idx < FANOUT; idx++)
crcs[idx] = reader.ReadBytes(crcs[idx].Length);
#endregion
#region 32 bit offset table
for (int idx = 0; idx < FANOUT; idx++)
offsets[idx] = reader.ReadBytes(offsets[idx].Length);
#endregion
// TODO: Support 64 bit tables
string packChecksum = reader.ReadBytes(20).GetString();
string idxChecksum = reader.ReadBytes(20).GetString();
}
}
private void VerifyPack()
{
using (GitPackReader reader = new GitPackReader(File.OpenRead(Path)))
{
string header;
int version, numberOfObjects;
header = reader.ReadBytes(4).GetString();
version = reader.ReadBytes(4).Sum(b => b);
numberOfObjects = reader.ReadBytes(4).Sum(b => b);
if (Version != version)
throw new PackFileException(String.Format("Bad version number {0}. Was expecting {1}", version, Version), Path);
if (HEADER != header)
throw new PackFileException("Invalid header for pack-file. Needs to be: 'PACK'", Path);
}
}