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rocksdb/table/plain_table_builder.cc

80 lines
1.9 KiB

// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include "table/plain_table_builder.h"
#include <assert.h>
#include <map>
#include "rocksdb/comparator.h"
#include "rocksdb/env.h"
#include "rocksdb/filter_policy.h"
#include "rocksdb/options.h"
#include "table/block_builder.h"
#include "table/filter_block.h"
#include "table/format.h"
#include "util/coding.h"
#include "util/crc32c.h"
#include "util/stop_watch.h"
namespace rocksdb {
PlainTableBuilder::PlainTableBuilder(const Options& options,
WritableFile* file,
int user_key_size, int key_prefix_len) :
options_(options), file_(file), user_key_size_(user_key_size) {
std::string version;
PutFixed32(&version, 1 | 0x80000000);
file_->Append(Slice(version));
offset_ = 4;
}
PlainTableBuilder::~PlainTableBuilder() {
}
Status PlainTableBuilder::ChangeOptions(const Options& options) {
return Status::OK();
}
void PlainTableBuilder::Add(const Slice& key, const Slice& value) {
assert((int) key.size() == GetInternalKeyLength());
// Write key-value pair
file_->Append(key);
offset_ += GetInternalKeyLength();
std::string size;
int value_size = value.size();
PutVarint32(&size, value_size);
Slice sizeSlice(size);
file_->Append(sizeSlice);
file_->Append(value);
offset_ += value_size + size.length();
num_entries_++;
}
Status PlainTableBuilder::status() const {
return Status::OK();
}
Status PlainTableBuilder::Finish() {
assert(!closed_);
closed_ = true;
return Status::OK();
}
void PlainTableBuilder::Abandon() {
closed_ = true;
}
uint64_t PlainTableBuilder::NumEntries() const {
return num_entries_;
}
uint64_t PlainTableBuilder::FileSize() const {
return offset_;
}
} // namespace rocksdb