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authordgrogan@chromium.org <dgrogan@chromium.org@62dab493-f737-651d-591e-8d6aee1b9529>2011-04-19 23:01:25 +0000
committerdgrogan@chromium.org <dgrogan@chromium.org@62dab493-f737-651d-591e-8d6aee1b9529>2011-04-19 23:01:25 +0000
commitb743906eeabc925f3e824d91a9747012bf249e2f (patch)
treee7cb4f854196c43045756469627920e4e7b146c1 /table/block_builder.h
parentb409afe968b6917574ec08e02c4bf6e6f722e3ca (diff)
downloadleveldb-b743906eeabc925f3e824d91a9747012bf249e2f.tar.gz
Revision created by MOE tool push_codebase.
MOE_MIGRATION= git-svn-id: https://leveldb.googlecode.com/svn/trunk@22 62dab493-f737-651d-591e-8d6aee1b9529
Diffstat (limited to 'table/block_builder.h')
-rw-r--r--table/block_builder.h57
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diff --git a/table/block_builder.h b/table/block_builder.h
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-// 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.
-
-#ifndef STORAGE_LEVELDB_TABLE_BLOCK_BUILDER_H_
-#define STORAGE_LEVELDB_TABLE_BLOCK_BUILDER_H_
-
-#include <vector>
-
-#include <stdint.h>
-#include "leveldb/slice.h"
-
-namespace leveldb {
-
-struct Options;
-
-class BlockBuilder {
- public:
- explicit BlockBuilder(const Options* options);
-
- // Reset the contents as if the BlockBuilder was just constructed.
- void Reset();
-
- // REQUIRES: Finish() has not been callled since the last call to Reset().
- // REQUIRES: key is larger than any previously added key
- void Add(const Slice& key, const Slice& value);
-
- // Finish building the block and return a slice that refers to the
- // block contents. The returned slice will remain valid for the
- // lifetime of this builder or until Reset() is called.
- Slice Finish();
-
- // Returns an estimate of the current (uncompressed) size of the block
- // we are building.
- size_t CurrentSizeEstimate() const;
-
- // Return true iff no entries have been added since the last Reset()
- bool empty() const {
- return buffer_.empty();
- }
-
- private:
- const Options* options_;
- std::string buffer_; // Destination buffer
- std::vector<uint32_t> restarts_; // Restart points
- int counter_; // Number of entries emitted since restart
- bool finished_; // Has Finish() been called?
- std::string last_key_;
-
- // No copying allowed
- BlockBuilder(const BlockBuilder&);
- void operator=(const BlockBuilder&);
-};
-
-}
-
-#endif // STORAGE_LEVELDB_TABLE_BLOCK_BUILDER_H_