chore: add newSeqUninit template (#126)

quic/helpers/sequninit.nim

@@ -0,0 +1,7 @@
+{.used.}
+
+when not declared(newSeqUninit):
+  # newSeqUninit template avoids deprecated errors
+  # for newSeqUninitialized in nim > 2.2
+  template newSeqUninit*[T: byte](len: Natural): seq[byte] =
+    newSeqUninitialized[byte](len)

quic/transport/ngtcp2/native/connection.nim

@@ -4,7 +4,7 @@ import bearssl/rand
 import chronicles
 import ../../../basics
 import ../../../udp/congestion
-import ../../../helpers/openarray
+import ../../../helpers/[openarray, sequninit]
 import ../../stream
 import ../../timeout
 import ../../connectionid
@@ -116,7 +116,7 @@ proc trySend(
 
   let flags = if isFin: NGTCP2_WRITE_STREAM_FLAG_FIN else: NGTCP2_WRITE_STREAM_FLAG_NONE
 
-  var buffer = newSeqUninitialized[byte](writeBufferSize)
+  var buffer = newSeqUninit[byte](writeBufferSize)
   var packetInfo: ngtcp2_pkt_info
   let length = ngtcp2_conn_write_stream_versioned(
     conn,
@@ -238,7 +238,7 @@ proc close*(connection: Ngtcp2Connection): Datagram =
   ngtcp2_ccerr_default(addr ccerr)
 
   var packetInfo: ngtcp2_pkt_info
-  var buffer = newSeqUninitialized[byte](writeBufferSize)
+  var buffer = newSeqUninit[byte](writeBufferSize)
   let length = ngtcp2_conn_write_connection_close_versioned(
     conn,
     connection.path.toPathPtr,

quic/transport/ngtcp2/native/parsedatagram.nim

@@ -1,11 +1,11 @@
 import pkg/ngtcp2
-import ../../../helpers/openarray
+import ../../../helpers/[openarray, sequninit]
 import ../../packetinfo
 import ../../connectionid
 import ./errors
 
 proc toConnectionId(p: ptr byte, length: uint): ConnectionId =
-  var bytes = newSeqUninitialized[byte](length)
+  var bytes = newSeqUninit[byte](length)
   copyMem(bytes.toPtr, p, length)
   ConnectionId(bytes)
 

quic/transport/ngtcp2/native/streams.nim

@@ -1,5 +1,5 @@
 import ngtcp2
-import ../../../helpers/openarray
+import ../../../helpers/[openarray, sequninit]
 import ../../stream
 import ../streamstate/openstate
 import ./connection
@@ -47,7 +47,7 @@ proc onReceiveStreamData(
 ): cint {.cdecl.} =
   trace "onReceiveStreamData"
   let state = cast[StreamState](stream_user_data)
-  var bytes = newSeqUninitialized[byte](datalen)
+  var bytes = newSeqUninit[byte](datalen)
   copyMem(bytes.toUnsafePtr, data, datalen)
   let isFin = (flags and NGTCP2_STREAM_DATA_FLAG_FIN) != 0
   if state != nil: