further reduce number of bt_find calls.

src/economy.c

@@ -1795,6 +1795,7 @@ static void expandselling(region * r, request * sellorders, int limit)
     unit *hafenowner;
     static int counter[MAXLUXURIES];
     static int ncounter = 0;
+    const struct building_type *castle_bt;
 
     if (ncounter == 0) {
         const luxury_type *ltype;
@@ -1810,15 +1811,15 @@ static void expandselling(region * r, request * sellorders, int limit)
     }
     /* Stelle Eigentümer der größten Burg fest. Bekommt Steuern aus jedem
      * Verkauf. Wenn zwei Burgen gleicher Größe bekommt gar keiner etwas. */
-
+    castle_bt = bt_find("castle");
     for (b = rbuildings(r); b; b = b->next) {
         if (b->size > maxsize && building_owner(b) != NULL
-            && b->type == bt_find("castle")) {
+            && b->type == castle_bt) {
             maxb = b;
             maxsize = b->size;
             maxowner = building_owner(b);
         }
-        else if (b->size == maxsize && b->type == bt_find("castle")) {
+        else if (b->size == maxsize && b->type == castle_bt) {
             maxb = (building *)NULL;
             maxowner = (unit *)NULL;
         }
@@ -1923,13 +1924,7 @@ static void expandselling(region * r, request * sellorders, int limit)
             }
         }
         if (use > 0) {
-#ifdef NDEBUG
             use_pooled(oa[j].unit, ltype->itype->rtype, GET_DEFAULT, use);
-#else
-            /* int i = */ use_pooled(oa[j].unit, ltype->itype->rtype, GET_DEFAULT,
-                use);
-            /* assert(i==use); */
-#endif
         }
     }
     free(oa);

src/kernel/building.c

@@ -446,6 +446,7 @@ void remove_building(building ** blist, building * b)
 
     /* Falls Karawanserei, Damm oder Tunnel einstürzen, wird die schon
      * gebaute Straße zur Hälfte vernichtet */
+    // TODO: caravan, tunnel, dam modularization ? is_building_type ?
     if (b->type == bt_caravan || b->type == bt_dam || b->type == bt_tunnel) {
         region *r = b->region;
         int d;

src/kernel/building.test.c

@@ -486,7 +486,6 @@ static void test_building_type(CuTest *tc) {
     btype = test_create_buildingtype("house");
     CuAssertIntEquals(tc, true, is_building_type(btype, "house"));
     CuAssertIntEquals(tc, false, is_building_type(btype, "castle"));
-    CuAssertIntEquals(tc, false, is_building_type(NULL, "house"));
     test_cleanup();
 }
 

src/kernel/config.c

@@ -764,8 +764,7 @@ static const int wagetable[7][4] = {
 
 int cmp_wage(const struct building *b, const building * a)
 {
-    const struct building_type *bt_castle = bt_find("castle");
-    if (b->type == bt_castle) {
+    if (is_building_type(b->type, "castle")) {
         if (!a)
             return 1;
         if (b->size > a->size)

src/laws.c

@@ -3082,10 +3082,7 @@ static void age_stonecircle(building *b) {
 
 static building *age_building(building * b)
 {
-    const struct building_type *bt_blessed;
-
-    bt_blessed = bt_find("blessedstonecircle");
-    if (bt_blessed && b->type == bt_blessed) {
+    if (is_building_type(b->type, "blessedstonecircle")) {
         age_stonecircle(b);
     }
     a_age(&b->attribs, b);

src/lighthouse.c

@@ -110,7 +110,7 @@ bool check_leuchtturm(region * r, faction * f)
         a = a->next) {
         building *b = (building *)a->data.v;
 
-        assert(b->type == bt_find("lighthouse"));
+        assert(is_building_type(b->type, "lighthouse"));
         if (fval(b, BLD_MAINTAINED) && b->size >= 10) {
             int maxd = (int)log10(b->size) + 1;
 

src/move.c

@@ -669,8 +669,7 @@ static bool is_freezing(const unit * u)
 int check_ship_allowed(struct ship *sh, const region * r)
 {
     int c = 0;
-    const building_type *bt_harbour = NULL;
-    bt_harbour = bt_find("harbour");
+    const building_type *bt_harbour = bt_find("harbour");
 
     if (sh->region && r_insectstalled(r)) {
         /* insekten dürfen nicht hier rein. haben wir welche? */
@@ -923,6 +922,7 @@ static unit *bewegung_blockiert_von(unit * reisender, region * r)
     int guard_count = 0;
     int stealth = eff_stealth(reisender, r);
     const struct resource_type *ramulet = get_resourcetype(R_AMULET_OF_TRUE_SEEING);
+    const struct building_type *castle_bt = bt_find("castle");
 
     double base_prob = config_get_flt("rules.guard.base_stop_prob", .3);
     double skill_prob = config_get_flt("rules.guard.skill_stop_prob", .1);
@@ -947,7 +947,7 @@ static unit *bewegung_blockiert_von(unit * reisender, region * r)
                 double prob_u = (sk - stealth) * skill_prob;
                 /* amulet counts at most once */
                 prob_u += _min(1, _min(u->number, i_get(u->items, ramulet->itype))) * amulet_prob;
-                if (u->building && (u->building->type == bt_find("castle")) && u == building_owner(u->building))
+                if (u->building && (u->building->type == castle_bt) && u == building_owner(u->building))
                     prob_u += castle_prob*buildingeffsize(u->building, 0);
                 if (prob_u >= prob) {
                     prob = prob_u;

src/reports.c

@@ -352,16 +352,13 @@ void
 report_building(const struct building *b, const char **name,
 const char **illusion)
 {
-    const struct building_type *bt_illusion;
-
     if (name) {
         *name = buildingtype(b->type, b, b->size);
     }
     if (illusion) {
         *illusion = NULL;
 
-        bt_illusion = bt_find("illusioncastle");
-        if (bt_illusion && b->type == bt_illusion) {
+        if (is_building_type(b->type, "illusioncastle")) {
             const attrib *a = a_find(b->attribs, &at_icastle);
             if (a != NULL) {
                 *illusion = buildingtype(icastle_type(a), b, b->size);

src/spells.c

@@ -969,7 +969,7 @@ static int sp_blessstonecircle(castorder * co)
 
     b = p->param[0]->data.b;
 
-    if (b->type != bt_find("stonecircle")) {
+    if (!is_building_type(b->type, "stonecircle")) {
         ADDMSG(&mage->faction->msgs, msg_feedback(mage, co->order,
             "error_notstonecircle", "building", b));
         return 0;
@@ -2052,7 +2052,7 @@ static int sp_homestone(castorder * co)
     double force = co->force;
     double effect;
     message *msg;
-    if (!mage->building || mage->building->type != bt_find("castle")) {
+    if (!mage->building || !is_building_type(mage->building->type, "castle")) {
         cmistake(mage, co->order, 197, MSG_MAGIC);
         return 0;
     }
@@ -5971,8 +5971,8 @@ int sp_movecastle(castorder * co)
         u = unext;
     }
 
-    if ((b->type == bt_find("caravan") || b->type == bt_find("dam")
-        || b->type == bt_find("tunnel"))) {
+    if ((is_building_type(b->type, "caravan") || is_building_type(b->type, "dam")
+        || is_building_type(b->type, "tunnel"))) {
         direction_t d;
         for (d = 0; d != MAXDIRECTIONS; ++d) {
             if (rroad(r, d)) {