event-test: Use goto cleanup instead of if else jungle

Like in the rest of our code we tend to prefer 'goto' and
'cleanup' over 'if else' code structure. Do the same here.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>

diff --git a/examples/object-events/event-test.c b/examples/object-events/event-test.c
index 1e3256f01dfae2cfcdcc46144eb1344a118dc77d..81830c7914529ce8b85ebbe36922892e4ba04bd6 100644 (file)
--- a/examples/object-events/event-test.c
+++ b/examples/object-events/event-test.c
@@ -616,6 +616,8 @@ static void stop(int sig)
 
 int main(int argc, char **argv)
 {
+    int ret = EXIT_FAILURE;
+    virConnectPtr dconn = NULL;
     int callback1ret = -1;
     int callback2ret = -1;
     int callback3ret = -1;
@@ -643,28 +645,27 @@ int main(int argc, char **argv)
 
     if (argc > 1 && STREQ(argv[1], "--help")) {
         usage(argv[0]);
-        return -1;
+        goto cleanup;
     }
 
     if (virInitialize() < 0) {
         fprintf(stderr, "Failed to initialize libvirt");
-        return -1;
+        goto cleanup;
     }
 
     if (virEventRegisterDefaultImpl() < 0) {
         virErrorPtr err = virGetLastError();
         fprintf(stderr, "Failed to register event implementation: %s\n",
                 err && err->message ? err->message: "Unknown error");
-        return -1;
+        goto cleanup;
     }
 
-    virConnectPtr dconn = NULL;
     dconn = virConnectOpenAuth(argc > 1 ? argv[1] : NULL,
                                virConnectAuthPtrDefault,
                                VIR_CONNECT_RO);
     if (!dconn) {
         printf("error opening\n");
-        return -1;
+        goto cleanup;
     }
 
     virConnectRegisterCloseCallback(dconn,
@@ -769,69 +770,75 @@ int main(int argc, char **argv)
                                                      VIR_DOMAIN_EVENT_CALLBACK(myDomainEventDeviceAddedCallback),
                                                      strdup("device added"), myFreeFunc);
 
-    if ((callback1ret != -1) &&
-        (callback2ret != -1) &&
-        (callback3ret != -1) &&
-        (callback4ret != -1) &&
-        (callback5ret != -1) &&
-        (callback6ret != -1) &&
-        (callback7ret != -1) &&
-        (callback9ret != -1) &&
-        (callback10ret != -1) &&
-        (callback11ret != -1) &&
-        (callback12ret != -1) &&
-        (callback13ret != -1) &&
-        (callback14ret != -1) &&
-        (callback15ret != -1) &&
-        (callback16ret != -1) &&
-        (callback17ret != -1) &&
-        (callback18ret != -1) &&
-        (callback19ret != -1)) {
-        if (virConnectSetKeepAlive(dconn, 5, 3) < 0) {
+    if ((callback1ret == -1) ||
+        (callback2ret == -1) ||
+        (callback3ret == -1) ||
+        (callback4ret == -1) ||
+        (callback5ret == -1) ||
+        (callback6ret == -1) ||
+        (callback7ret == -1) ||
+        (callback9ret == -1) ||
+        (callback10ret == -1) ||
+        (callback11ret == -1) ||
+        (callback12ret == -1) ||
+        (callback13ret == -1) ||
+        (callback14ret == -1) ||
+        (callback15ret == -1) ||
+        (callback16ret == -1) ||
+        (callback17ret == -1) ||
+        (callback18ret == -1) ||
+        (callback19ret == -1))
+        goto cleanup;
+
+    if (virConnectSetKeepAlive(dconn, 5, 3) < 0) {
+        virErrorPtr err = virGetLastError();
+        fprintf(stderr, "Failed to start keepalive protocol: %s\n",
+                err && err->message ? err->message : "Unknown error");
+        run = 0;
+    }
+
+    while (run) {
+        if (virEventRunDefaultImpl() < 0) {
             virErrorPtr err = virGetLastError();
-            fprintf(stderr, "Failed to start keepalive protocol: %s\n",
+            fprintf(stderr, "Failed to run event loop: %s\n",
                     err && err->message ? err->message : "Unknown error");
-            run = 0;
-        }
-
-        while (run) {
-            if (virEventRunDefaultImpl() < 0) {
-                virErrorPtr err = virGetLastError();
-                fprintf(stderr, "Failed to run event loop: %s\n",
-                        err && err->message ? err->message : "Unknown error");
-            }
         }
-
-        VIR_DEBUG("Deregistering event handlers");
-        virConnectDomainEventDeregister(dconn, myDomainEventCallback1);
-        virConnectDomainEventDeregisterAny(dconn, callback2ret);
-        virConnectDomainEventDeregisterAny(dconn, callback3ret);
-        virConnectDomainEventDeregisterAny(dconn, callback4ret);
-        virConnectDomainEventDeregisterAny(dconn, callback5ret);
-        virConnectDomainEventDeregisterAny(dconn, callback6ret);
-        virConnectDomainEventDeregisterAny(dconn, callback7ret);
-        virConnectDomainEventDeregisterAny(dconn, callback9ret);
-        virConnectDomainEventDeregisterAny(dconn, callback10ret);
-        virConnectDomainEventDeregisterAny(dconn, callback11ret);
-        virConnectDomainEventDeregisterAny(dconn, callback12ret);
-        virConnectDomainEventDeregisterAny(dconn, callback13ret);
-        virConnectDomainEventDeregisterAny(dconn, callback14ret);
-        virConnectDomainEventDeregisterAny(dconn, callback15ret);
-        virConnectNetworkEventDeregisterAny(dconn, callback16ret);
-        virConnectDomainEventDeregisterAny(dconn, callback17ret);
-        virConnectDomainEventDeregisterAny(dconn, callback18ret);
-        virConnectDomainEventDeregisterAny(dconn, callback19ret);
-
-        if (callback8ret != -1)
-            virConnectDomainEventDeregisterAny(dconn, callback8ret);
     }
 
+    VIR_DEBUG("Deregistering event handlers");
+    virConnectDomainEventDeregister(dconn, myDomainEventCallback1);
+    virConnectDomainEventDeregisterAny(dconn, callback2ret);
+    virConnectDomainEventDeregisterAny(dconn, callback3ret);
+    virConnectDomainEventDeregisterAny(dconn, callback4ret);
+    virConnectDomainEventDeregisterAny(dconn, callback5ret);
+    virConnectDomainEventDeregisterAny(dconn, callback6ret);
+    virConnectDomainEventDeregisterAny(dconn, callback7ret);
+    virConnectDomainEventDeregisterAny(dconn, callback9ret);
+    virConnectDomainEventDeregisterAny(dconn, callback10ret);
+    virConnectDomainEventDeregisterAny(dconn, callback11ret);
+    virConnectDomainEventDeregisterAny(dconn, callback12ret);
+    virConnectDomainEventDeregisterAny(dconn, callback13ret);
+    virConnectDomainEventDeregisterAny(dconn, callback14ret);
+    virConnectDomainEventDeregisterAny(dconn, callback15ret);
+    virConnectNetworkEventDeregisterAny(dconn, callback16ret);
+    virConnectDomainEventDeregisterAny(dconn, callback17ret);
+    virConnectDomainEventDeregisterAny(dconn, callback18ret);
+    virConnectDomainEventDeregisterAny(dconn, callback19ret);
+
+    if (callback8ret != -1)
+        virConnectDomainEventDeregisterAny(dconn, callback8ret);
+
     virConnectUnregisterCloseCallback(dconn, connectClose);
+    ret = EXIT_SUCCESS;
 
-    VIR_DEBUG("Closing connection");
-    if (dconn && virConnectClose(dconn) < 0)
-        printf("error closing\n");
 
-    printf("done\n");
-    return 0;
+ cleanup:
+    if (dconn) {
+        VIR_DEBUG("Closing connection");
+        if (virConnectClose(dconn) < 0)
+            printf("error closing\n");
+        printf("done\n");
+    }
+
+    return ret;
 }