/// <summary>
/// Generates random flow of rows.
/// </summary>
public static IEnumerable <KeyValuePair <byte[], byte[]> > Flow(this Random random, long COUNT, int KEY_LENGTH, int REC_LENGTH, KeysType keys, ByteOrder byteOrder)
{
if (KEY_LENGTH < 8)
{
throw new ArgumentException("KEY_LENGTH < 8");
}
switch (keys)
{
case KeysType.Random:
{
for (long i = 0; i < COUNT; i++)
{
byte[] key = new byte[KEY_LENGTH];
random.NextBytes(key);
byte[] rec = new byte[REC_LENGTH];
random.NextBytes(rec);
yield return(new KeyValuePair <byte[], byte[]>(key, rec));
}
}
break;
case KeysType.Sequential:
{
switch (byteOrder)
{
case ByteOrder.LittleEndian:
{
for (long i = 0; i < COUNT; i++)
{
byte[] key = new byte[KEY_LENGTH];
var b = BitConverter.GetBytes(i);
key[0] = b[0];
key[1] = b[1];
key[2] = b[2];
key[3] = b[3];
key[4] = b[4];
key[5] = b[5];
key[6] = b[6];
key[7] = b[7];
byte[] rec = new byte[REC_LENGTH];
random.NextBytes(rec);
yield return(new KeyValuePair <byte[], byte[]>(key, rec));
}
}
break;
case ByteOrder.BigEndian:
{
for (long i = 0; i < COUNT; i++)
{
byte[] key = new byte[KEY_LENGTH];
var b = BitConverter.GetBytes(i);
key[KEY_LENGTH - 1] = b[0];
key[KEY_LENGTH - 2] = b[1];
key[KEY_LENGTH - 3] = b[2];
key[KEY_LENGTH - 4] = b[3];
key[KEY_LENGTH - 5] = b[4];
key[KEY_LENGTH - 6] = b[5];
key[KEY_LENGTH - 7] = b[6];
key[KEY_LENGTH - 8] = b[7];
byte[] rec = new byte[REC_LENGTH];
random.NextBytes(rec);
yield return(new KeyValuePair <byte[], byte[]>(key, rec));
}
}
break;
default:
throw new NotSupportedException(byteOrder.ToString());
}
}
break;
default:
throw new NotSupportedException(keys.ToString());
}
}
