XOY-Leveldb

小组成员：谢瑞阳、徐翔宇

Historia

costan 9b44da73d9 Clarify comments for leveldb::Env file reading methods. "Create a brand new [adjective] file" seems like the description for a method that will create a new file, but is used for methods that open existing files for read access. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=211468002		6 lat temu
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c.h	Expose WriteBatch::Append in the C API.	6 lat temu
cache.h	Replace NULL with nullptr in C++ files.	6 lat temu
comparator.h	Add LEVELDB_EXPORT macro to export public symbols.	7 lat temu
db.h	Replace NULL with nullptr in C++ files.	6 lat temu
dumpfile.h	Add LEVELDB_EXPORT macro to export public symbols.	7 lat temu
env.h	Clarify comments for leveldb::Env file reading methods.	6 lat temu
export.h	Add CMake build support.	6 lat temu
filter_policy.h	leveldb: Require C++11.	6 lat temu
iterator.h	Clean up Iterator.	6 lat temu
options.h	Replace NULL with nullptr in C++ files.	6 lat temu
slice.h	leveldb: Require C++11.	6 lat temu
status.h	Add move constructor to Status.	6 lat temu
table.h	Replace NULL with nullptr in C++ files.	6 lat temu
table_builder.h	leveldb: Require C++11.	6 lat temu
write_batch.h	Expose WriteBatch::Append().	6 lat temu