private int NextInteger()
{
if (selectorIndex == 4)
{
if (!EnsureBuffer(1))
{
throw new Exception("Wrong data");
}
int selector = (int)buffer[indxInBuffer++];
selectors[3] = (selector & 0b11) + 1;
selectors[2] = ((selector >> 2) & 0b11) + 1;
selectors[1] = ((selector >> 4) & 0b11) + 1;
selectors[0] = ((selector >> 6) & 0b11) + 1;
selectorIndex = 0;
}
if (!EnsureBuffer(selectors[selectorIndex]))
{
throw new Exception("Wrong data");
}
var result = GroupVarint.ReadInt(buffer, indxInBuffer, selectors[selectorIndex]);
indxInBuffer += selectors[selectorIndex];
selectorIndex++;
return(result);
}
public bool MoveNext()
{
while (true)
{
if (state == 0)
{
if (continuationOffset > 0)
{
readOffset = continuationOffset;
isEof = false;
dataInBuffer = 0;
indxInBuffer = 0;
}
if (isEof)
{
return(false);
}
var buffer = new byte[HeaderLength];
persistentStorage.ReadAll(readOffset, buffer, 0, buffer.Length);
continuationOffset = BitConverter.ToInt64(buffer, 0);
listEndOffset = readOffset + HeaderLength + BitConverter.ToInt32(buffer, sizeof(long));
readOffset += buffer.Length;
state = 1;
}
if (state == 1)
{
if (!ReadSelectors())
{
throw new Exception("Wrong data");
}
EnsureBuffer(selector1 + selector2 + selector3);
var docId = GroupVarint.ReadInt(buffer, indxInBuffer, selector1);
indxInBuffer += selector1;
var fieldId = GroupVarint.ReadInt(buffer, indxInBuffer, selector2);
indxInBuffer += selector2;
var tokenId = GroupVarint.ReadInt(buffer, indxInBuffer, selector3);
indxInBuffer += selector3;
state = (isEof && indxInBuffer >= dataInBuffer) ? 0 : 4;
current = Occurrence.O((ulong)docId, (ulong)fieldId, (ulong)tokenId);
return(true);
}
if (state == 4)
{
EnsureBuffer(selector4);
var docId = GroupVarint.ReadInt(buffer, indxInBuffer, selector4);
indxInBuffer += selector4;
if (!ReadSelectors())
{
throw new Exception("Wrong data");
}
EnsureBuffer(selector1 + selector2);
var fieldId = GroupVarint.ReadInt(buffer, indxInBuffer, selector1);
indxInBuffer += selector1;
var tokenId = GroupVarint.ReadInt(buffer, indxInBuffer, selector2);
indxInBuffer += selector2;
state = (isEof && indxInBuffer >= dataInBuffer) ? 0 : 3;
current = Occurrence.O((ulong)docId, (ulong)fieldId, (ulong)tokenId);
return(true);
}
if (state == 3)
{
EnsureBuffer(selector3 + selector4);
var docId = GroupVarint.ReadInt(buffer, indxInBuffer, selector3);
indxInBuffer += selector3;
var fieldId = GroupVarint.ReadInt(buffer, indxInBuffer, selector4);
indxInBuffer += selector4;
if (!ReadSelectors())
{
throw new Exception("Wrong data");
}
EnsureBuffer(selector1);
var tokenId = GroupVarint.ReadInt(buffer, indxInBuffer, selector1);
indxInBuffer += selector1;
state = (isEof && indxInBuffer >= dataInBuffer) ? 0 : 2;
current = Occurrence.O((ulong)docId, (ulong)fieldId, (ulong)tokenId);
return(true);
}
if (state == 2)
{
EnsureBuffer(selector2 + selector3 + selector4);
var docId = GroupVarint.ReadInt(buffer, indxInBuffer, selector2);
indxInBuffer += selector2;
var fieldId = GroupVarint.ReadInt(buffer, indxInBuffer, selector3);
indxInBuffer += selector3;
var tokenId = GroupVarint.ReadInt(buffer, indxInBuffer, selector4);
indxInBuffer += selector4;
state = (isEof && indxInBuffer >= dataInBuffer) ? 0 : 1;
current = Occurrence.O((ulong)docId, (ulong)fieldId, (ulong)tokenId);
return(true);
}
throw new Exception("What?");
}
}