add leveldb

1 files changed, 38 insertions, 0 deletions

diff --git a/src/database/database.cpp b/src/database/database.cpp
new file mode 100644
index 00000000..7cfd0581
--- /dev/null
+++ b/src/database/database.cpp
@@ -0,0 +1,38 @@
+#include "database.hpp"
+
+#include "esp_log.h"
+#include "leveldb/cache.h"
+
+#include "env_esp.hpp"
+
+namespace database {
+
+static SingletonEnv<leveldb::EspEnv> sEnv;
+
+auto Database::Open() -> cpp::result<Database*, DatabaseError> {
+  leveldb::DB* db;
+  leveldb::Cache* cache = leveldb::NewLRUCache(24 * 1024);
+  leveldb::Options options;
+  options.env = sEnv.env();
+  options.create_if_missing = true;
+  options.write_buffer_size = 48 * 1024;
+  options.max_file_size = 32;
+  options.block_cache = cache;
+  options.block_size = 512;
+
+  auto status = leveldb::DB::Open(options, "/.db", &db);
+  if (!status.ok()) {
+    delete cache;
+    ESP_LOGE("DB", "failed to open db");
+    return cpp::fail(FAILED_TO_OPEN);
+  }
+
+  return new Database(db, cache);
+}
+
+Database::Database(leveldb::DB* db, leveldb::Cache* cache)
+    : db_(db), cache_(cache) {}
+
+Database::~Database() {}
+
+}  // namespace database