Add printTree

ConflictSet.cpp

@@ -1083,8 +1083,25 @@ void bench() {
   }
 }
 
+void printTree() {
+  int64_t writeVersion = 0;
+  ConflictSet::Impl cs{writeVersion};
+  ReferenceImpl refImpl{writeVersion};
+  Arena arena;
+  constexpr int kNumKeys = 5;
+  auto *write = new (arena) ConflictSet::WriteRange[kNumKeys];
+  for (int i = 0; i < kNumKeys; ++i) {
+    write[i].begin = toKey(arena, i);
+    write[i].end.len = 0;
+    write[i].writeVersion = ++writeVersion;
+  }
+  cs.addWrites(write, kNumKeys);
+  debugPrintDot(stdout, cs.root);
+}
+
 int main(void) {
-  bench();
+  // bench();
+  printTree();
   return 0;
 }
 #endif

Internal.h

@@ -410,28 +410,16 @@ struct ReferenceImpl {
 using Key = ConflictSet::Key;
 
 [[maybe_unused]] static Key toKey(Arena &arena, int n) {
-  constexpr int kMaxLength = 8;
-  int i = kMaxLength;
-  uint8_t *itoaBuf = new (arena) uint8_t[kMaxLength];
-  memset(itoaBuf, '0', kMaxLength);
-  do {
-    itoaBuf[--i] = "0123456789abcdef"[n % 16];
-    n /= 16;
-  } while (n);
-  return Key{itoaBuf, kMaxLength};
+  uint8_t *buf = new (arena) uint8_t[sizeof(n)];
+  memcpy(buf, &n, sizeof(n));
+  return Key{buf, sizeof(n)};
 }
 
 [[maybe_unused]] static Key toKeyAfter(Arena &arena, int n) {
-  constexpr int kMaxLength = 8;
-  int i = kMaxLength;
-  uint8_t *itoaBuf = new (arena) uint8_t[kMaxLength + 1];
-  memset(itoaBuf, '0', kMaxLength);
-  itoaBuf[kMaxLength] = 0;
-  do {
-    itoaBuf[--i] = "0123456789abcdef"[n % 16];
-    n /= 16;
-  } while (n);
-  return Key{itoaBuf, kMaxLength + 1};
+  uint8_t *buf = new (arena) uint8_t[sizeof(n) + 1];
+  memcpy(buf, &n, sizeof(n));
+  buf[sizeof(n)] = 0;
+  return Key{buf, sizeof(n) + 1};
 }
 
 inline std::string printable(std::string_view key) {