Tweak the enet examples.

- Allow using arrow keys for control.
- Make them compile without C99.
- Fix warnings and style issues.

Author: SiegeLordEx

examples/ex_enet_client.c

@@ -65,12 +65,12 @@ static ENetPeer* connect_client(ENetHost *client, int port)
    enet_address_set_host(&address, "localhost");
    address.port = port;
    /* Initiate the connection, allocating the two channels 0 and 1. */
-   server = enet_host_connect(client, & address, 2, 0);
+   server = enet_host_connect(client, &address, 2, 0);
    if (server == NULL)
       abort_example("Client: No available peers for initiating an ENet connection.\n");
 
    /* Wait up to 5 seconds for the connection attempt to succeed. */
-   if (enet_host_service(client, & event, 5000) > 0 &&
+   if (enet_host_service(client, &event, 5000) > 0 &&
       event.type == ENET_EVENT_TYPE_CONNECT)
    {
       printf("Client: Connected to %x:%u.\n",
@@ -138,6 +138,7 @@ int main(int argc, char **argv)
    bool done = false;  // when true, client exits
    int dx = 0, dy = 0; // movement direction
    int port = DEFAULT_PORT;
+   int i;
 
    if (argc == 2) {
       port = atoi(argv[1]);
@@ -186,17 +187,25 @@ int main(int argc, char **argv)
             break;
          case ALLEGRO_EVENT_KEY_DOWN:
             switch (event.keyboard.keycode) {
+               case ALLEGRO_KEY_UP:
                case ALLEGRO_KEY_W: dy -= 1; direction_changed = true; break;
+               case ALLEGRO_KEY_DOWN:
                case ALLEGRO_KEY_S: dy += 1; direction_changed = true; break;
+               case ALLEGRO_KEY_LEFT:
                case ALLEGRO_KEY_A: dx -= 1; direction_changed = true; break;
+               case ALLEGRO_KEY_RIGHT:
                case ALLEGRO_KEY_D: dx += 1; direction_changed = true; break;
             }
             break;
          case ALLEGRO_EVENT_KEY_UP:
             switch (event.keyboard.keycode) {
+               case ALLEGRO_KEY_UP:
                case ALLEGRO_KEY_W: dy += 1; direction_changed = true; break;
+               case ALLEGRO_KEY_DOWN:
                case ALLEGRO_KEY_S: dy -= 1; direction_changed = true; break;
+               case ALLEGRO_KEY_LEFT:
                case ALLEGRO_KEY_A: dx += 1; direction_changed = true; break;
+               case ALLEGRO_KEY_RIGHT:
                case ALLEGRO_KEY_D: dx -= 1; direction_changed = true; break;
             }
             break;
@@ -229,7 +238,7 @@ int main(int argc, char **argv)
 
          // draw each player
          al_clear_to_color(al_map_rgb_f(0, 0, 0));
-         for (int i = 0; i < MAX_PLAYER_COUNT; i++) {
+         for (i = 0; i < MAX_PLAYER_COUNT; i++) {
             if (!players[i].active) continue;
 
             int x = players[i].x;
@@ -244,6 +253,7 @@ int main(int argc, char **argv)
    disconnect_client(client, server);
    enet_host_destroy(client);
    enet_deinitialize();
+   return 0;
 }
 
 /* vim: set sts=3 sw=3 et: */

examples/ex_enet_server.c

@@ -24,8 +24,9 @@ static float rand01(void) { return rand() / (float)RAND_MAX; }
 
 static int init_player(void)
 {
+   int i;
    // find the first open player slot
-   for (int i = 0 ; i < MAX_PLAYER_COUNT ; ++i) {
+   for (i = 0 ; i < MAX_PLAYER_COUNT ; ++i) {
       if (!players[i].active) {
          // assign a random color and position to this new player
          players[i].active = true;
@@ -58,6 +59,7 @@ static void send_receive(ENetHost *server)
    ServerMessage msg_out;
    ENetPacket *packet;
    ENetEvent event;
+   int i;
 
    // Process all messages in queue, exit as soon as it is empty
    while (enet_host_service(server, &event, 0) > 0) {
@@ -91,7 +93,7 @@ static void send_receive(ENetHost *server)
             enet_host_broadcast(server, 0, packet);
 
             // notify new client of all other existing players
-            for (int i = 0 ; i < MAX_PLAYER_COUNT ; ++i) {
+            for (i = 0 ; i < MAX_PLAYER_COUNT ; ++i) {
                if (!players[i].active || i == player_id) continue;
 
                msg_out = create_join_message(i);
@@ -136,7 +138,8 @@ static void send_receive(ENetHost *server)
 
 static void update_players(ENetHost *server, float time)
 {
-   for (int i = 0 ; i < MAX_PLAYER_COUNT ; ++i) {
+   int i;
+   for (i = 0 ; i < MAX_PLAYER_COUNT ; ++i) {
       if (!players[i].active) continue;
 
       players[i].x += players[i].dx * PLAYER_SPEED * time;
@@ -163,11 +166,11 @@ static ENetHost* create_server(int port)
    ENetHost *server;
    /* Bind the server to the default localhost.     */
    /* A specific host address can be specified by   */
-   /* enet_address_set_host (& address, "x.x.x.x"); */
+   /* enet_address_set_host (&address, "x.x.x.x"); */
    address.host = ENET_HOST_ANY;
    /* Bind the server to port 1234. */
    address.port = port;
-   server = enet_host_create(& address /* the address to bind the server host to */,
+   server = enet_host_create(&address /* the address to bind the server host to */,
       32      /* allow up to 32 clients and/or outgoing connections */,
       2      /* allow up to 2 channels to be used, 0 and 1 */,
       0      /* assume any amount of incoming bandwidth */,
@@ -231,6 +234,7 @@ int main(int argc, char **argv)
 
    enet_host_destroy(server);
    enet_deinitialize();
+   return 0;
 }
 
 /* vim: set sts=3 sw=3 et: */