New name UI_UPDATE for interpret_move's return "".

[sgt-puzzles.git] / pegs.c

diff --git a/pegs.c b/pegs.c
index 82868519546e872f79c39d6a149d2e6dbae361a2..38e73b74f65698115ab48faa4eb34deaf25f7952 100644 (file)
--- a/pegs.c
+++ b/pegs.c
@@ -848,7 +848,7 @@ static char *interpret_move(const game_state *state, game_ui *ui,
            ui->dx = x;
            ui->dy = y;
             ui->cur_visible = ui->cur_jumping = 0;
-           return "";                 /* ui modified */
+           return UI_UPDATE;
        }
     } else if (button == LEFT_DRAG && ui->dragging) {
        /*
@@ -856,7 +856,7 @@ static char *interpret_move(const game_state *state, game_ui *ui,
         */
        ui->dx = x;
        ui->dy = y;
-       return "";                     /* ui modified */
+       return UI_UPDATE;
     } else if (button == LEFT_RELEASE && ui->dragging) {
        int tx, ty, dx, dy;
 
@@ -868,18 +868,18 @@ static char *interpret_move(const game_state *state, game_ui *ui,
        tx = FROMCOORD(x);
        ty = FROMCOORD(y);
        if (tx < 0 || tx >= w || ty < 0 || ty >= h)
-           return "";                 /* target out of range */
+           return UI_UPDATE;          /* target out of range */
        dx = tx - ui->sx;
        dy = ty - ui->sy;
        if (max(abs(dx),abs(dy)) != 2 || min(abs(dx),abs(dy)) != 0)
-           return "";                 /* move length was wrong */
+           return UI_UPDATE;          /* move length was wrong */
        dx /= 2;
        dy /= 2;
 
        if (state->grid[ty*w+tx] != GRID_HOLE ||
            state->grid[(ty-dy)*w+(tx-dx)] != GRID_PEG ||
            state->grid[ui->sy*w+ui->sx] != GRID_PEG)
-           return "";                 /* grid contents were invalid */
+           return UI_UPDATE;          /* grid contents were invalid */
 
        /*
         * We have a valid move. Encode it simply as source and
@@ -899,7 +899,7 @@ static char *interpret_move(const game_state *state, game_ui *ui,
                 ui->cur_x = cx;
                 ui->cur_y = cy;
             }
-            return "";
+            return UI_UPDATE;
         } else {
             int dx, dy, mx, my, jx, jy;
 
@@ -922,21 +922,21 @@ static char *interpret_move(const game_state *state, game_ui *ui,
                 ui->cur_x = jx; ui->cur_y = jy;
                 return dupstr(buf);
             }
-            return "";
+            return UI_UPDATE;
         }
     } else if (IS_CURSOR_SELECT(button)) {
         if (!ui->cur_visible) {
             ui->cur_visible = 1;
-            return "";
+            return UI_UPDATE;
         }
         if (ui->cur_jumping) {
             ui->cur_jumping = 0;
-            return "";
+            return UI_UPDATE;
         }
         if (state->grid[ui->cur_y*w+ui->cur_x] == GRID_PEG) {
             /* cursor is on peg: next arrow-move wil jump. */
             ui->cur_jumping = 1;
-            return "";
+            return UI_UPDATE;
         }
         return NULL;
     }