1 files changed, 91 insertions, 0 deletions
diff --git a/src/rocksdb/table/sst_file_reader.cc b/src/rocksdb/table/sst_file_reader.cc
new file mode 100644
index 000000000..9e3ba6eab
--- /dev/null
+++ b/src/rocksdb/table/sst_file_reader.cc
@@ -0,0 +1,91 @@
+//  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).
+
+#ifndef ROCKSDB_LITE
+
+#include "rocksdb/sst_file_reader.h"
+
+#include "db/db_iter.h"
+#include "db/dbformat.h"
+#include "env/composite_env_wrapper.h"
+#include "file/random_access_file_reader.h"
+#include "options/cf_options.h"
+#include "table/get_context.h"
+#include "table/table_builder.h"
+#include "table/table_reader.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+struct SstFileReader::Rep {
+  Options options;
+  EnvOptions soptions;
+  ImmutableCFOptions ioptions;
+  MutableCFOptions moptions;
+
+  std::unique_ptr<TableReader> table_reader;
+
+  Rep(const Options& opts)
+      : options(opts),
+        soptions(options),
+        ioptions(options),
+        moptions(ColumnFamilyOptions(options)) {}
+};
+
+SstFileReader::SstFileReader(const Options& options) : rep_(new Rep(options)) {}
+
+SstFileReader::~SstFileReader() {}
+
+Status SstFileReader::Open(const std::string& file_path) {
+  auto r = rep_.get();
+  Status s;
+  uint64_t file_size = 0;
+  std::unique_ptr<RandomAccessFile> file;
+  std::unique_ptr<RandomAccessFileReader> file_reader;
+  s = r->options.env->GetFileSize(file_path, &file_size);
+  if (s.ok()) {
+    s = r->options.env->NewRandomAccessFile(file_path, &file, r->soptions);
+  }
+  if (s.ok()) {
+    file_reader.reset(new RandomAccessFileReader(
+        NewLegacyRandomAccessFileWrapper(file), file_path));
+  }
+  if (s.ok()) {
+    TableReaderOptions t_opt(r->ioptions, r->moptions.prefix_extractor.get(),
+                             r->soptions, r->ioptions.internal_comparator);
+    // Allow open file with global sequence number for backward compatibility.
+    t_opt.largest_seqno = kMaxSequenceNumber;
+    s = r->options.table_factory->NewTableReader(t_opt, std::move(file_reader),
+                                                 file_size, &r->table_reader);
+  }
+  return s;
+}
+
+Iterator* SstFileReader::NewIterator(const ReadOptions& options) {
+  auto r = rep_.get();
+  auto sequence = options.snapshot != nullptr
+                      ? options.snapshot->GetSequenceNumber()
+                      : kMaxSequenceNumber;
+  auto internal_iter = r->table_reader->NewIterator(
+      options, r->moptions.prefix_extractor.get(), /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kSSTFileReader);
+  return NewDBIterator(r->options.env, options, r->ioptions, r->moptions,
+                       r->ioptions.user_comparator, internal_iter, sequence,
+                       r->moptions.max_sequential_skip_in_iterations,
+                       nullptr /* read_callback */);
+}
+
+std::shared_ptr<const TableProperties> SstFileReader::GetTableProperties()
+    const {
+  return rep_->table_reader->GetTableProperties();
+}
+
+Status SstFileReader::VerifyChecksum(const ReadOptions& read_options) {
+  return rep_->table_reader->VerifyChecksum(read_options,
+                                            TableReaderCaller::kSSTFileReader);
+}
+
+}  // namespace ROCKSDB_NAMESPACE
+
+#endif  // !ROCKSDB_LITE