void RequestQueue::operator=(RequestQueue &rq)
{
PSLICE n, u = (PSLICE) 0;
size_t idx;
int flag = 0;
if( rq_head ) _empty_slice_list(&rq_head);
rq_head = rq.rq_head;
rq_send = rq_head;
// Reassign only the first piece represented in the queue.
n = rq_head;
idx = n->index;
for( ; n ; u = n,n = u->next ){
if( rq.rq_send == n ) flag = 1;
if( n->index != idx ) break;
}
if(n){
u->next = (PSLICE) 0;
rq.rq_head = n;
if(flag) rq.rq_send = rq.rq_head;
}else{
rq.rq_head = (PSLICE) 0;
rq.rq_send = rq.rq_head;
}
}
bool RequestQueue::Delete(bt_index_t idx)
{
PIECE *piece, *prev;
if( !(piece = FindPiece(idx, &prev)) ) return false;
if( prev ) prev->next = piece->next;
else rq_head = piece->next;
if( rq_send && rq_send->index == idx )
rq_send = piece->next ? piece->next->slices : (SLICE *)0;
piece->next = (PIECE *)0;
_empty_slice_list(&piece);
return true;
}
// Returns true if the piece was moved successfully.
bool RequestQueue::Transfer(RequestQueue &dstq, bt_index_t idx)
{
bool result = true;
PIECE *piece, *prev;
if( !(piece = FindPiece(idx, &prev)) ) return true;
if( rq_send && rq_send->index == idx )
rq_send = piece->next ? piece->next->slices : (SLICE *)0;
if( prev ) prev->next = piece->next;
else rq_head = piece->next;
piece->next = (PIECE *)0;
if( (&PENDING == &dstq && piece->count >= NSlices(piece->slices->index)) ||
!dstq.Append(piece) ){
_empty_slice_list(&piece);
result = false;
}
return result;
}
bt_index_t RequestQueue::Reassign(RequestQueue &dstq, const Bitfield &bf)
{
PIECE *piece, *prev = (PIECE *)0;
bt_index_t idx = BTCONTENT.GetNPieces();
for( piece = rq_head; piece; piece = prev ? prev->next : rq_head ){
if( bf.IsSet(piece->slices->index) &&
!dstq.HasPiece(piece->slices->index) ){
idx = piece->slices->index;
if( rq_send && rq_send->index == idx )
rq_send = piece->next ? piece->next->slices : (SLICE *)0;
if( prev ) prev->next = piece->next;
else rq_head = piece->next;
piece->next = (PIECE *)0;
if( !dstq.Append(piece) ) _empty_slice_list(&piece);
else break;
}else prev = piece;
}
return idx;
}
void RequestQueue::SetHead(PSLICE ps)
{
if( rq_head ) _empty_slice_list(&rq_head);
rq_head = ps;
rq_send = rq_head;
}
void RequestQueue::Empty()
{
if(rq_head) _empty_slice_list(&rq_head);
rq_send = rq_head;
}
RequestQueue::~RequestQueue()
{
if( rq_head ) _empty_slice_list(&rq_head);
}