diff options
Diffstat (limited to 'worker/imap/seqmap.go')
| -rw-r--r-- | worker/imap/seqmap.go | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/worker/imap/seqmap.go b/worker/imap/seqmap.go index 2752cc87..093bbc52 100644 --- a/worker/imap/seqmap.go +++ b/worker/imap/seqmap.go @@ -1,6 +1,8 @@ package imap -import "sync" +import ( + "sync" +) type SeqMap struct { lock sync.Mutex @@ -35,7 +37,17 @@ func (s *SeqMap) Pop(seqnum uint32) (uint32, bool) { s.lock.Lock() uid, found := s.m[seqnum] if found { - delete(s.m, seqnum) + m := make(map[uint32]uint32) + for s, u := range s.m { + if s > seqnum { + // All sequence numbers greater than the removed one must be decremented by one + // https://datatracker.ietf.org/doc/html/rfc3501#section-7.4.1 + m[s-1] = u + } else if s < seqnum { + m[s] = u + } + } + s.m = m } s.lock.Unlock() return uid, found |