public void BlockFile_ReadWrite_Reverse()
{
BlockFile bf;
string path;
byte[] buf = new byte[cbBlock];
byte[] test = new byte[cbBlock];
path = Path.GetTempPath() + Helper.NewGuid().ToString() + ".blocks";
bf = new BlockFile(path, cbBlock, 0, FileMode.Create);
try
{
// Write blocks backwards read them back stepping backwards
// as well.
for (int i = cBlocks - 1; i >= 0; i--)
{
for (int j = 0; j < cbBlock; j++)
{
buf[j] = (byte)(j + i + 7);
}
bf.Write(i, buf, cbBlock);
}
for (int i = cBlocks - 1; i >= 0; i--)
{
for (int j = 0; j < cbBlock; j++)
{
test[j] = (byte)(j + i + 7);
}
bf.Read(i, buf, cbBlock);
CollectionAssert.AreEqual(test, buf);
}
}
finally
{
if (bf != null)
{
bf.Close();
}
if (File.Exists(path))
{
File.Delete(path);
}
}
}
public void BlockFile_Preallocate()
{
BlockFile bf;
string path;
byte[] buf = new byte[cbBlock];
byte[] test = new byte[cbBlock];
path = Path.GetTempPath() + Helper.NewGuid().ToString() + ".blocks";
bf = new BlockFile(path, cbBlock, cBlocks, FileMode.Create);
try
{
// Write blocks forward from block 0 on and then
// read them back stepping forward as well.
for (int i = 0; i < cBlocks; i++)
{
for (int j = 0; j < cbBlock; j++)
{
buf[j] = (byte)(j + i);
}
bf.Write(i, buf, cbBlock);
}
for (int i = 0; i < cBlocks; i++)
{
for (int j = 0; j < cbBlock; j++)
{
test[j] = (byte)(j + i);
}
bf.Read(i, buf, cbBlock);
CollectionAssert.AreEqual(test, buf);
}
}
finally
{
if (bf != null)
{
bf.Close();
}
if (File.Exists(path))
{
File.Delete(path);
}
}
}
public void BlockFile_Async()
{
BlockFile bf;
string path;
byte[] test = new byte[cbBlock];
IAsyncResult[] ars = new IAsyncResult[cBlocks];
byte[][] bufs;
path = Path.GetTempPath() + Helper.NewGuid().ToString() + ".blocks";
bf = new BlockFile(path, cbBlock, cBlocks, FileMode.Create);
bufs = new byte[cBlocks][];
for (int i = 0; i < cBlocks; i++)
{
bufs[i] = new byte[cbBlock];
}
try
{
// Initiate asynchronous write operations for all of
// the blocks.
for (int i = 0; i < cBlocks; i++)
{
for (int j = 0; j < cbBlock; j++)
{
bufs[i][j] = (byte)(j + i);
}
}
for (int i = 0; i < cBlocks; i++)
{
ars[i] = bf.BeginWrite(i, bufs[i], cbBlock, null, null);
}
// Wait for all of the writes to complete.
for (int i = 0; i < cBlocks; i++)
{
bf.EndWrite(ars[i]);
}
// Clear the buffers
for (int i = 0; i < cBlocks; i++)
{
for (int j = 0; j < cbBlock; j++)
{
bufs[i][j] = 0;
}
}
// Now go back and initiate async operations to read the blocks
// back.
for (int i = cBlocks - 1; i >= 0; i--)
{
ars[i] = bf.BeginRead(i, bufs[i], cbBlock, null, null);
}
// Wait for all of the reads to complete.
for (int i = 0; i < cBlocks; i++)
{
bf.EndRead(ars[i]);
}
// Now verify the data read.
for (int i = 0; i < cBlocks; i++)
{
for (int j = 0; j < cbBlock; j++)
{
test[j] = (byte)(j + i);
}
CollectionAssert.AreEqual(test, bufs[i]);
}
}
finally
{
if (bf != null)
{
bf.Close();
}
if (File.Exists(path))
{
File.Delete(path);
}
}
}