* speed up hop-to-hop calculations

* better and faster trip clustering: trip tries
* add --write-colors to extract line colors from OSM data
* refactor config parameter names, update default pfaedle.cfg
* add --stats for writing a stats.json file
* add --no-fast-hops, --no-a-star, --no-trie for debugging
* general refactoring

src/pfaedle/router/HopCache.cpp

@@ -0,0 +1,40 @@
+// Copyright 2020, University of Freiburg,
+// Chair of Algorithms and Data Structures.
+// Authors: Patrick Brosi <brosi@informatik.uni-freiburg.de>
+
+#include <utility>
+#include <set>
+#include "pfaedle/router/HopCache.h"
+#include "pfaedle/trgraph/Graph.h"
+#include "util/Misc.h"
+
+using pfaedle::router::HopCache;
+using pfaedle::trgraph::Edge;
+
+// _____________________________________________________________________________
+void HopCache::setMin(const Edge* a, const Edge* b, uint32_t val) {
+  _cache.set(a, b, val);
+}
+
+// _____________________________________________________________________________
+void HopCache::setEx(const Edge* a, const Edge* b, uint32_t val) {
+  int64_t v = val;
+  _cache.set(a, b, -(v + 1));
+}
+
+// _____________________________________________________________________________
+void HopCache::setMin(const Edge* a, const std::set<Edge*>& b, uint32_t val) {
+  for (auto eb : b) _cache.set(a, eb, val);
+}
+
+// _____________________________________________________________________________
+void HopCache::setMin(const std::set<Edge*>& a, const Edge* b, uint32_t val) {
+  for (auto ea : a) _cache.set(ea, b, val);
+}
+
+// _____________________________________________________________________________
+std::pair<uint32_t, bool> HopCache::get(const Edge* a, const Edge* b) const {
+  int64_t v = _cache.get(a, b);
+  if (v < 0) return {(-v) - 1, 1};
+  return {v, 0};
+}