public override void TestFixtureSetUp()
{
base.TestFixtureSetUp();
var header = new PTableHeader(1);
using (var f = File.Open(Filename, FileMode.OpenOrCreate)) {
f.Seek(0, SeekOrigin.Begin);
var bytes = header.AsByteArray();
f.Write(bytes, 0, bytes.Length);
var size = (long)(uint.MaxValue + 10000000L) * (long)PTable.IndexEntrySize + PTableHeader.Size + PTable.MD5Size;
Console.WriteLine("allocating file " + Filename + " size is " + size);
f.SetLength(size);
Console.WriteLine("file allocated");
}
_ptable = PTable.FromFile(Filename, 22);
}
public static void CreatePTableFile(string filename, long ptableSize, int indexEntrySize, int cacheDepth = 16)
{
//TODO: fix this unsafe test it will fill the target disk if the test is aborted or an error occurs
Ensure.NotNullOrEmpty(filename, "filename");
Ensure.Nonnegative(cacheDepth, "cacheDepth");
var sw = Stopwatch.StartNew();
var tableId = Guid.NewGuid();
using (var fs = new FileStream(filename, FileMode.Create, FileAccess.ReadWrite, FileShare.None,
DefaultSequentialBufferSize, FileOptions.SequentialScan)) {
fs.SetLength((long)ptableSize);
fs.Seek(0, SeekOrigin.Begin);
var recordCount = (long)((ptableSize - PTableHeader.Size - PTable.MD5Size) / (long)indexEntrySize);
using (var md5 = MD5.Create())
using (var cs = new CryptoStream(fs, md5, CryptoStreamMode.Write))
using (var bs = new BufferedStream(cs, DefaultSequentialBufferSize)) {
// WRITE HEADER
var headerBytes = new PTableHeader(Version).AsByteArray();
cs.Write(headerBytes, 0, headerBytes.Length);
// WRITE INDEX ENTRIES
var buffer = new byte[indexEntrySize];
for (long i = 0; i < recordCount; i++)
{
bs.Write(buffer, 0, indexEntrySize);
}
bs.Flush();
cs.FlushFinalBlock();
// WRITE MD5
var hash = md5.Hash;
fs.Write(hash, 0, hash.Length);
}
}
Console.WriteLine("Created PTable File[{0}, size of {1}] in {2}.", tableId, ptableSize, sw.Elapsed);
}
