join kNoLevel and level 0 in hashmap key to enable destination matching

exe/backend/src/main.cc

@@ -82,10 +82,10 @@ int main(int argc, char const* argv[]) {
   if (!fs::exists(platforms_check_path)) {
     std::cout << platforms_check_path << " does not exist\n";
   }
-  auto const pl = (!fs::exists(platforms_check_path))
-                      ? std::unique_ptr<platforms>{}
-                      : std::make_unique<platforms>(
-                            opt.data_dir_, cista::mmap::protection::READ);
+  auto const pl = fs::exists(platforms_check_path)
+                      ? std::make_unique<platforms>(
+                            opt.data_dir_, cista::mmap::protection::READ)
+                      : nullptr;
   if (pl != nullptr) {
     pl->build_rtree(w);
   }

include/osr/routing/profiles/foot.h

@@ -16,7 +16,13 @@ struct foot {
   static constexpr auto const kOffroadPenalty = 3U;
 
   struct node {
-    friend bool operator==(node, node) = default;
+    friend bool operator==(node const a, node const b) {
+      auto const is_zero = [](level_t const l) {
+        return l == kNoLevel || l == level_t{0.F};
+      };
+      return a.n_ == b.n_ &&
+             (a.lvl_ == b.lvl_ || (is_zero(a.lvl_) && is_zero(b.lvl_)));
+    }
 
     static constexpr node invalid() noexcept {
       return {.n_ = node_idx_t::invalid(), .lvl_{kNoLevel}};
@@ -90,7 +96,8 @@ struct foot {
     auto operator()(node const n) const noexcept -> std::uint64_t {
       using namespace ankerl::unordered_dense::detail;
       return wyhash::mix(
-          wyhash::hash(static_cast<std::uint64_t>(to_idx(n.lvl_))),
+          wyhash::hash(static_cast<std::uint64_t>(
+              to_idx(n.lvl_ == kNoLevel ? level_t{0.F} : n.lvl_))),
           wyhash::hash(static_cast<std::uint64_t>(to_idx(n.n_))));
     }
   };