1 files changed, 122 insertions, 0 deletions
diff --git a/src/rocksdb/options/options_helper.h b/src/rocksdb/options/options_helper.h
new file mode 100644
index 000000000..7c751fc25
--- /dev/null
+++ b/src/rocksdb/options/options_helper.h
@@ -0,0 +1,122 @@
+// Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
+#pragma once
+
+#include <map>
+#include <stdexcept>
+#include <string>
+#include <vector>
+
+#include "rocksdb/advanced_options.h"
+#include "rocksdb/options.h"
+#include "rocksdb/status.h"
+#include "rocksdb/table.h"
+
+namespace ROCKSDB_NAMESPACE {
+struct ColumnFamilyOptions;
+struct ConfigOptions;
+struct DBOptions;
+struct ImmutableCFOptions;
+struct ImmutableDBOptions;
+struct MutableDBOptions;
+struct MutableCFOptions;
+struct Options;
+
+std::vector<CompressionType> GetSupportedCompressions();
+
+std::vector<CompressionType> GetSupportedDictCompressions();
+
+std::vector<ChecksumType> GetSupportedChecksums();
+
+inline bool IsSupportedChecksumType(ChecksumType type) {
+  // Avoid annoying compiler warning-as-error (-Werror=type-limits)
+  auto min = kNoChecksum;
+  auto max = kXXH3;
+  return type >= min && type <= max;
+}
+
+// Checks that the combination of DBOptions and ColumnFamilyOptions are valid
+Status ValidateOptions(const DBOptions& db_opts,
+                       const ColumnFamilyOptions& cf_opts);
+
+DBOptions BuildDBOptions(const ImmutableDBOptions& immutable_db_options,
+                         const MutableDBOptions& mutable_db_options);
+
+ColumnFamilyOptions BuildColumnFamilyOptions(
+    const ColumnFamilyOptions& ioptions,
+    const MutableCFOptions& mutable_cf_options);
+
+void UpdateColumnFamilyOptions(const ImmutableCFOptions& ioptions,
+                               ColumnFamilyOptions* cf_opts);
+void UpdateColumnFamilyOptions(const MutableCFOptions& moptions,
+                               ColumnFamilyOptions* cf_opts);
+
+#ifndef ROCKSDB_LITE
+std::unique_ptr<Configurable> DBOptionsAsConfigurable(
+    const MutableDBOptions& opts);
+std::unique_ptr<Configurable> DBOptionsAsConfigurable(
+    const DBOptions& opts,
+    const std::unordered_map<std::string, std::string>* opt_map = nullptr);
+std::unique_ptr<Configurable> CFOptionsAsConfigurable(
+    const MutableCFOptions& opts);
+std::unique_ptr<Configurable> CFOptionsAsConfigurable(
+    const ColumnFamilyOptions& opts,
+    const std::unordered_map<std::string, std::string>* opt_map = nullptr);
+
+extern Status StringToMap(
+    const std::string& opts_str,
+    std::unordered_map<std::string, std::string>* opts_map);
+#endif  // !ROCKSDB_LITE
+
+struct OptionsHelper {
+  static const std::string kCFOptionsName /*= "ColumnFamilyOptions"*/;
+  static const std::string kDBOptionsName /*= "DBOptions" */;
+  static std::map<CompactionStyle, std::string> compaction_style_to_string;
+  static std::map<CompactionPri, std::string> compaction_pri_to_string;
+  static std::map<CompactionStopStyle, std::string>
+      compaction_stop_style_to_string;
+  static std::map<Temperature, std::string> temperature_to_string;
+  static std::unordered_map<std::string, ChecksumType> checksum_type_string_map;
+  static std::unordered_map<std::string, CompressionType>
+      compression_type_string_map;
+  static std::unordered_map<std::string, PrepopulateBlobCache>
+      prepopulate_blob_cache_string_map;
+#ifndef ROCKSDB_LITE
+  static std::unordered_map<std::string, CompactionStopStyle>
+      compaction_stop_style_string_map;
+  static std::unordered_map<std::string, EncodingType> encoding_type_string_map;
+  static std::unordered_map<std::string, CompactionStyle>
+      compaction_style_string_map;
+  static std::unordered_map<std::string, CompactionPri>
+      compaction_pri_string_map;
+  static std::unordered_map<std::string, Temperature> temperature_string_map;
+#endif  // !ROCKSDB_LITE
+};
+
+// Some aliasing
+static auto& compaction_style_to_string =
+    OptionsHelper::compaction_style_to_string;
+static auto& compaction_pri_to_string = OptionsHelper::compaction_pri_to_string;
+static auto& compaction_stop_style_to_string =
+    OptionsHelper::compaction_stop_style_to_string;
+static auto& temperature_to_string = OptionsHelper::temperature_to_string;
+static auto& checksum_type_string_map = OptionsHelper::checksum_type_string_map;
+#ifndef ROCKSDB_LITE
+static auto& compaction_stop_style_string_map =
+    OptionsHelper::compaction_stop_style_string_map;
+static auto& compression_type_string_map =
+    OptionsHelper::compression_type_string_map;
+static auto& encoding_type_string_map = OptionsHelper::encoding_type_string_map;
+static auto& compaction_style_string_map =
+    OptionsHelper::compaction_style_string_map;
+static auto& compaction_pri_string_map =
+    OptionsHelper::compaction_pri_string_map;
+static auto& temperature_string_map = OptionsHelper::temperature_string_map;
+static auto& prepopulate_blob_cache_string_map =
+    OptionsHelper::prepopulate_blob_cache_string_map;
+#endif  // !ROCKSDB_LITE
+
+}  // namespace ROCKSDB_NAMESPACE