prevent over-buying cargo

src/client.c

@@ -779,15 +779,23 @@ fn bool updateAndRender(TuiState* tui, void* s, u8* input_buffer, u64 loop_count
           if (input_buffer[0] == 'q' || user_pressed_esc) {
             should_quit = true;
           }
-          renderStrToBuffer(tui->frame_buffer, box.x+2, box.y+1, SHIP_TYPE_STRINGS[state->me.type], screen_dimensions);
-          renderStrToBuffer(tui->frame_buffer, box.x+2, box.y+2, "Credits: ", screen_dimensions);
+          u32 yoff = box.y+1;
+          renderStrToBuffer(tui->frame_buffer, box.x+2, yoff++, SHIP_TYPE_STRINGS[state->me.type], screen_dimensions);
+
+          renderStrToBuffer(tui->frame_buffer, box.x+2, yoff, "Credits: ", screen_dimensions);
           MemoryZero(sbuf, 512);
           sprintf(sbuf, "%.2f", state->me.credits);
-          renderStrToBuffer(tui->frame_buffer, box.x+15, box.y+2, sbuf, screen_dimensions);
+          renderStrToBuffer(tui->frame_buffer, box.x+15, yoff++, sbuf, screen_dimensions);
+
+          u32 used_cargo = usedVacuumCargoSlots(state->me);
+          MemoryZero(sbuf, 512);
+          sprintf(sbuf, "Cargo: %d / %d", used_cargo, state->me.vacuum_cargo_slots);
+          renderStrToBuffer(tui->frame_buffer, box.x+2, yoff++, sbuf, screen_dimensions);
+
           for (u32 i = 0; i < Commodity_Count; i++) {
             MemoryZero(sbuf, 512);
             sprintf(sbuf, "%-42s %d", COMMODITY_STRINGS[i], state->me.commodities[i]);
-            renderStrToBuffer(tui->frame_buffer, box.x+4, box.y+4+i, sbuf, screen_dimensions);
+            renderStrToBuffer(tui->frame_buffer, box.x+4, yoff+4+i, sbuf, screen_dimensions);
           }
         } break;
         case TabStation: {

src/server.c

@@ -625,15 +625,14 @@ fn void* gameLoop(void* params) {
             bool is_buying_from_system = msg.byte;
             Account* account = &state.accounts[client->account_id];
             StarSystem* sys = findAccountsSystem(account);
-            printf("%d %lld %s\n", account->id, account->ship.id, sys->name);
             u32 total_available = sys->planets[0].commodities[msg.commodity] + sys->planets[1].commodities[msg.commodity] + sys->planets[2].commodities[msg.commodity];
             u32 qty_traded = 0;
             u32 credit_value = 0;
             if (is_buying_from_system) {
-              printf("is buying from system\n");
-              for (u32 amount_to_buy = Min(msg.qty, total_available); amount_to_buy > 0; amount_to_buy--, total_available--) {
+              u32 ship_space = account->ship.vacuum_cargo_slots - usedVacuumCargoSlots(account->ship);
+              for (u32 amount_to_buy = Min(msg.qty, total_available); amount_to_buy > 0; amount_to_buy--, total_available--, ship_space--) {
                 u32 price = priceForCommodity(msg.commodity, total_available, false);
-                if (price > account->ship.credits) {
+                if (price > account->ship.credits || ship_space == 0) {
                   amount_to_buy = 0;
                   break;
                 }

src/shared.h

@@ -324,6 +324,14 @@ typedef struct PlayerShip {
   u32 commodities[Commodity_Count];
 } PlayerShip;
 
+fn u32 usedVacuumCargoSlots(PlayerShip ship) {
+  u32 used_cargo = 0;
+  for (u32 i = 0; i < Commodity_Count; i++) {
+    used_cargo += ship.commodities[i];
+  }
+  return used_cargo;
+}
+
 typedef enum PlanetType {
   PlanetTypeNull,
   PlanetTypeEarth,