refactor: some style improvemnts in examples

Signed-off-by: Christopher Arndt <chris@chrisarndt.de>

examples/test_port_connect_cb.nim

@@ -28,7 +28,7 @@ proc portConnected(portA: PortIdT; portB: PortIdT; connect: cint; arg: pointer)
     else:
         echo "Port B: <unknown>"
         
-    echo "Action: " & (if connect > 0: "connect" else: "disconnect")
+    echo "Action: " $ (if connect > 0: "connect" else: "disconnect")
     
 
 jclient = clientOpen("jacket_port_register", NoStartServer.ord, addr status)
@@ -39,8 +39,6 @@ if jclient == nil:
     echo getJackStatusErrorString(status)
     quit 1
 
-setControlCHook(cleanup)
-
 discard portRegister(jclient, "in_1", JACK_DEFAULT_AUDIO_TYPE, PortIsInput.ord, 0)
 discard portRegister(jclient, "out_1", JACK_DEFAULT_AUDIO_TYPE, PortIsOutput.ord, 0)
 

jacket.nim

@@ -457,33 +457,37 @@ proc setInfoFunction*(infoCallback: JackInfoCallback) {.importc: "jack_set_info_
 
 proc getJackStatusErrorString*(status: cint): string =
     # Get JACK error status as string.
-    if status == Success.ord:
+    if status == ord(Success):
         return ""
 
-    if status == Failure.ord:
+    var errorString = ""
+
+    if status == ord(Failure):
         # Only include this generic message if no other error status is set
-        result = "Overall operation failed"
-    if (status and InvalidOption.ord) > 0:
-        result.add("\nThe operation contained an invalid and unsupported option")
-    if (status and NameNotUnique.ord) > 0:
-        result.add("\nThe desired client name was not unique")
-    if (status and ServerStarted.ord) > 0:
-        result.add("\nThe JACK server was started as a result of this operation")
-    if (status and ServerFailed.ord) > 0:
-        result.add("\nUnable to connect to the JACK server")
-    if (status and ServerError.ord) > 0:
-        result.add("\nCommunication error with the JACK server")
-    if (status and NoSuchClient.ord) > 0:
-        result.add("\nRequested client does not exist")
-    if (status and LoadFailure.ord) > 0:
-        result.add("\nUnable to load internal client")
-    if (status and InitFailure.ord) > 0:
-        result.add("\nUnable to initialize client")
-    if (status and ShmFailure.ord) > 0:
-        result.add("\nUnable to access shared memory")
-    if (status and VersionError.ord) > 0:
-        result.add("\nClient's protocol version does not match")
-    if (status and BackendError.ord) > 0:
-        result.add("\nBackend Error")
-    if (status and ClientZombie.ord) > 0:
-        result.add("\nClient is being shutdown against its will")
+        errorString = "Overall operation failed"
+    if (status and ord(InvalidOption)) > 0:
+        errorString &= "\nThe operation contained an invalid and unsupported option"
+    if (status and ord(NameNotUnique)) > 0:
+        errorString &= "\nThe desired client name was not unique"
+    if (status and ord(ServerStarted)) > 0:
+        errorString &= "\nThe JACK server was started as a result of this operation"
+    if (status and ord(ServerFailed)) > 0:
+        errorString &= "\nUnable to connect to the JACK server"
+    if (status and ord(ServerError)) > 0:
+        errorString &= "\nCommunication error with the JACK server"
+    if (status and ord(NoSuchClient)) > 0:
+        errorString &= "\nRequested client does not exist"
+    if (status and ord(LoadFailure)) > 0:
+        errorString &= "\nUnable to load internal client"
+    if (status and ord(InitFailure)) > 0:
+        errorString &= "\nUnable to initialize client"
+    if (status and ord(ShmFailure)) > 0:
+        errorString &= "\nUnable to access shared memory"
+    if (status and ord(VersionError)) > 0:
+        errorString &= "\nClient's protocol version does not match"
+    if (status and ord(BackendError)) > 0:
+        errorString &= "\nBackend Error"
+    if (status and ord(ClientZombie)) > 0:
+        errorString &= "\nClient is being shutdown against its will"
+
+    return errorString