crashfix mapper

Lua: get_region_by_id

src/eressea/gmtool.c

@@ -277,12 +277,15 @@ cursor_region(const view * v, const coordinate * c)
   coordinate relpos;
   int cx, cy;
 
+  if (c) {
     relpos.x = c->x - v->topleft.x;
     relpos.y = c->y - v->topleft.y;
     cy = relpos.y;
     cx = relpos.x + cy/2;
     return mr_get(v, cx, cy);
   }
+  return NULL;
+}
 
 static void
 draw_cursor(WINDOW * win, selection * s, const view * v, const coordinate * c, int show)
@@ -294,6 +297,8 @@ draw_cursor(WINDOW * win, selection * s, const view * v, const coordinate * c, i
   coordinate relpos;
   int cx, cy;
 
+  if (!mr) return;
+
   relpos.x = c->x - v->topleft.x;
   relpos.y = c->y - v->topleft.y;
   cy = relpos.y;
@@ -790,6 +795,7 @@ handlekey(state * st, int c)
   case 0x09: /* tab = next selected*/
     if (regions!=NULL) {
       map_region * mr = cursor_region(&st->display, cursor);
+      if (mr) {
         region * first = mr->r;
         region * cur = (first&&first->next)?first->next:regions;
         while (cur!=first) {
@@ -805,12 +811,13 @@ handlekey(state * st, int c)
           if (!cur && first) cur = regions;
         }
       }
+    }
     break;
 
   case 'a':
     if (regions!=NULL) {
       map_region * mr = cursor_region(&st->display, cursor);
-      if (mr->r) {
+      if (mr && mr->r) {
         region * cur = mr->r;
         if (cur->planep==NULL) {
           cur = r_standard_to_astral(cur);
@@ -968,7 +975,7 @@ handlekey(state * st, int c)
     } else if (findmode && regions!=NULL) {
       struct faction * f = NULL;
       map_region * mr = cursor_region(&st->display, cursor);
-      region * first = (mr->r && mr->r->next)?mr->r->next:regions;
+      region * first = (mr && mr->r && mr->r->next)?mr->r->next:regions;
 
       if (findmode=='f') {
         sprintf(sbuffer, "find-faction: %s", locate);

src/eressea/lua/gm.cpp

@@ -26,7 +26,7 @@ region *
 current_region(void)
 {
   map_region * mr = cursor_region(&current_state->display, &current_state->cursor);
-  return mr->r;
+  return mr?mr->r:NULL;
 }
 
 static tag *

src/eressea/lua/region.cpp

@@ -349,6 +349,7 @@ bind_region(lua_State * L)
   module(L)[
     def("regions", &get_regions, return_stl_iterator),
     def("get_region", &findregion),
+    def("get_region_by_id", &findregionbyid),
     def("terraform", &region_terraform),
     def("distance", &distance),
     def("remove_region", &region_remove),