cleanup: fix some uninitialized memory warnings and clarify some logic

src/game_base.c

@@ -517,10 +517,10 @@ static void game_draw_help_bar(const GameData *game, WINDOW *win)
 {
     int max_x;
     int max_y;
-    UNUSED_VAR(max_x);
-
     getmaxyx(win, max_y, max_x);
 
+    UNUSED_VAR(max_x);
+
     wmove(win, max_y - 1, 1);
 
     if (!game->is_multiplayer) {
@@ -937,10 +937,10 @@ int game_y_bottom_bound(const GameData *game)
 {
     int max_x;
     int max_y;
-    UNUSED_VAR(max_x);
-
     getmaxyx(game->window, max_y, max_x);
 
+    UNUSED_VAR(max_x);
+
     return ((max_y + game->game_max_y) / 2) - 1;
 }
 
@@ -948,10 +948,10 @@ int game_y_top_bound(const GameData *game)
 {
     int max_x;
     int max_y;
-    UNUSED_VAR(max_x);
-
     getmaxyx(game->window, max_y, max_x);
 
+    UNUSED_VAR(max_x);
+
     return ((max_y - game->game_max_y) / 2) + 1;
 }
 
@@ -959,10 +959,10 @@ int game_x_right_bound(const GameData *game)
 {
     int max_x;
     int max_y;
-    UNUSED_VAR(max_y);
-
     getmaxyx(game->window, max_y, max_x);
 
+    UNUSED_VAR(max_y);
+
     return ((max_x + game->game_max_x) / 2) - 1;
 }
 
@@ -970,10 +970,10 @@ int game_x_left_bound(const GameData *game)
 {
     int max_x;
     int max_y;
-    UNUSED_VAR(max_y);
-
     getmaxyx(game->window, max_y, max_x);
 
+    UNUSED_VAR(max_y);
+
     return ((max_x - game->game_max_x) / 2) + 1;
 }
 

src/game_chess.c

@@ -804,11 +804,13 @@ static bool chess_mock_move_valid(ChessState *state, const Player *player, Tile
 {
     Board *board = &state->board;
 
+    const bool en_passant = player->en_passant_move_number == -1;
     bool in_check = false;
     Tile *ep_tile = NULL;
     Piece ep_piece;
+    memset(&ep_piece, 0, sizeof(ep_piece));
 
-    if (player->en_passant_move_number == -1) {  // remove piece that was captured via en passant
+    if (en_passant) {  // remove piece that was captured via en passant
         ChessCoords ep_coords;
         ep_coords.N = player->colour == White ? to->chess_coords.N - 1 : to->chess_coords.N + 1;
         ep_coords.L = to->chess_coords.L;
@@ -819,7 +821,7 @@ static bool chess_mock_move_valid(ChessState *state, const Player *player, Tile
         }
 
         chess_copy_piece(&ep_piece, &ep_tile->piece);
-        ep_tile->piece.type = NoPiece;
+        ep_tile->piece.type = NoPiece;  // temporarily remove piece
     }
 
     Piece from_piece;
@@ -835,8 +837,8 @@ static bool chess_mock_move_valid(ChessState *state, const Player *player, Tile
     from->piece.type = from_piece.type;
     chess_copy_piece(&to->piece, &to_piece);
 
-    if (player->en_passant_move_number == -1) {
+    if (en_passant) {
-        ep_tile->piece.type = ep_piece.type;
+        ep_tile->piece.type = ep_piece.type;  // reset piece to original state
     }
 
     return !in_check;

src/line_info.c

@@ -148,9 +148,10 @@ static int print_n_chars(WINDOW *win, const char *s, size_t n, int max_y)
 
             int x;
             int y;
-            UNUSED_VAR(x);
             getyx(win, y, x);
 
+            UNUSED_VAR(x);
+
             // make sure cursor will wrap correctly after newline to prevent display bugs
             if (y + 1 >= max_y) {
                 return -1;
@@ -324,10 +325,10 @@ static void line_info_init_line(ToxWindow *self, struct line_info *line)
 {
     int y2;
     int x2;
-    UNUSED_VAR(y2);
-
     getmaxyx(self->window, y2, x2);
 
+    UNUSED_VAR(y2);
+
     const int max_y = y2 - CHATBOX_HEIGHT - WINDOW_BAR_HEIGHT;
     const int max_x = self->show_peerlist ? x2 - 1 - SIDEBAR_WIDTH : x2;
 
@@ -522,10 +523,10 @@ void line_info_print(ToxWindow *self)
     while (line && numlines++ <= max_y && print_ret == 0) {
         int y;
         int x;
-        UNUSED_VAR(y);
-
         getyx(win, y, x);
 
+        UNUSED_VAR(y);
+
         if (x > 0) { // Prevents us from printing off the screen
             break;
         }

src/name_lookup.c

@@ -108,14 +108,15 @@ static int load_nameserver_list(const char *path)
     char line[MAX_SERVER_LINE];
 
     while (fgets(line, sizeof(line), fp) && Nameservers.lines < MAX_SERVERS) {
-        int linelen = strlen(line);
+        size_t linelen = strlen(line);
 
         if (linelen < SERVER_KEY_SIZE * 2 + 5) {
             continue;
         }
 
         if (line[linelen - 1] == '\n') {
-            line[--linelen] = '\0';
+            --linelen;
+            line[linelen] = '\0';
         }
 
         const char *name = strtok(line, " ");

src/windows.c

@@ -685,10 +685,10 @@ void draw_window_bar(ToxWindow *self)
 
     int cur_x;
     int cur_y;
-    UNUSED_VAR(cur_y);
-
     getyx(win, cur_y, cur_x);
 
+    UNUSED_VAR(cur_y);
+
     wattron(win, COLOR_PAIR(BAR_TEXT));
     mvwhline(win, 0, cur_x, ' ', COLS - cur_x);
     wattroff(win, COLOR_PAIR(BAR_TEXT));