Use NET_Status in public API (#137)

Author: andy5995

src/SDL_net.c

@@ -284,11 +284,11 @@ static int SDLCALL ResolverThread(void *data)
             SDL_Delay(RandomNumberBetween(250, 2000 + (50 * simulated_loss)));
         }
 
-        int outcome;
+        NET_Status outcome;
         if (!simulated_loss || (RandomNumberBetween(0, 100) > simulated_loss)) {
             outcome = ResolveAddress(addr);            
         } else {
-            outcome = -1;
+            outcome = NET_FAILURE;
             addr->errstr = SDL_strdup("simulated failure");
         }
 
@@ -1371,10 +1371,10 @@ static bool PumpDatagramSocket(NET_DatagramSocket *sock)
     while (sock->pending_output_len > 0) {
         SDL_assert(sock->pending_output != NULL);
         NET_Datagram *dgram = sock->pending_output[0];
-        const int rc = SendOneDatagram(sock, dgram->addr, dgram->port, dgram->buf, dgram->buflen);
-        if (rc < 0) {  // failure!
+        const NET_Status rc = SendOneDatagram(sock, dgram->addr, dgram->port, dgram->buf, dgram->buflen);
+        if (rc == NET_FAILURE) {  // failure!
             return false;
-        } else if (rc == 0) {  // wouldblock
+        } else if (rc == NET_WOULDBLOCK) {
             break;  // stop trying to send packets for now.
         }
 
@@ -1408,13 +1408,13 @@ bool NET_SendDatagram(NET_DatagramSocket *sock, NET_Address *addr, Uint16 port,
     }
 
     if (sock->pending_output_len == 0) {  // nothing queued? See if we can just send this without queueing.
-        const int rc = SendOneDatagram(sock, addr, port, buf, buflen);
-        if (rc < 0) {
+        const NET_Status rc = SendOneDatagram(sock, addr, port, buf, buflen);
+        if (rc == NET_FAILURE) {
             return false;  // error string was already set in SendOneDatagram.
-        } else if (rc == 1) {
+        } else if (rc == NET_SUCCESS) {
             return true;   // successfully sent.
         }
-        // if rc==0, it wasn't sent, because we would have blocked. Queue it for later, below.
+        // if rc == NET_WOULDBLOCK, it wasn't sent. Queue it for later, below.
     }
 
     // queue this up for sending later.