Lint everything

Summary:
```
arc2 lint --everything
```

run the linter on the whole code repo to fix exisitng lint issues

Test Plan: make check -j64

Reviewers: sdong, rven, anthony, kradhakrishnan, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D50769

db/db_bench.cc

@@ -376,8 +376,8 @@ DEFINE_int32(compaction_readahead_size, 0, "Compaction readahead size");
 DEFINE_int32(random_access_max_buffer_size, 1024 * 1024,
              "Maximum windows randomaccess buffer size");
 
-DEFINE_int32(writable_file_max_buffer_size, 1024 * 1024, 
-             "Maximum write buffer for Writeable File");
+DEFINE_int32(writable_file_max_buffer_size, 1024 * 1024,
+             "Maximum write buffer for Writable File");
 
 DEFINE_int32(skip_table_builder_flush, false, "Skip flushing block in "
              "table builder ");
@@ -2448,7 +2448,7 @@ class Benchmark {
       block_based_options.block_size = FLAGS_block_size;
       block_based_options.block_restart_interval = FLAGS_block_restart_interval;
       block_based_options.filter_policy = filter_policy_;
-      block_based_options.skip_table_builder_flush = 
+      block_based_options.skip_table_builder_flush =
           FLAGS_skip_table_builder_flush;
       block_based_options.format_version = 2;
       options.table_factory.reset(

db/listener_test.cc

@@ -533,4 +533,3 @@ int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
 }
-

doc/log_format.txt

@@ -11,7 +11,7 @@ Each block consists of a sequence of records:
 
 A record never starts within the last six bytes of a block (since it
 won't fit).  Any leftover bytes here form the trailer, which must
-consist entirely of zero bytes and must be skipped by readers.  
+consist entirely of zero bytes and must be skipped by readers.
 
 Aside: if exactly seven bytes are left in the current block, and a new
 non-zero length record is added, the writer must emit a FIRST record

include/rocksdb/options.h

@@ -1090,8 +1090,8 @@ struct DBOptions {
   size_t random_access_max_buffer_size;
 
   // This is the maximum buffer size that is used by WritableFileWriter.
-  // On Windows, we need to maintain an aligned buffer for writes. 
-  // We allow the buffer to grow until it's size hits the limit. 
+  // On Windows, we need to maintain an aligned buffer for writes.
+  // We allow the buffer to grow until it's size hits the limit.
   //
   // Default: 1024 * 1024 (1 MB)
   size_t writable_file_max_buffer_size;

include/rocksdb/table.h

@@ -129,19 +129,19 @@ struct BlockBasedTableOptions {
   bool whole_key_filtering = true;
 
   // If true, block will not be explictly flushed to disk during building
-  // a SstTable. Instead, buffer in WritableFileWriter will take 
-  // care of the flushing when it is full. 
+  // a SstTable. Instead, buffer in WritableFileWriter will take
+  // care of the flushing when it is full.
   //
-  // On Windows, this option helps a lot when unbuffered I/O 
-  // (allow_os_buffer = false) is used, since it avoids small 
-  // unbuffered disk write. 
+  // On Windows, this option helps a lot when unbuffered I/O
+  // (allow_os_buffer = false) is used, since it avoids small
+  // unbuffered disk write.
   //
-  // User may also adjust writable_file_max_buffer_size to optimize disk I/O 
-  // size. 
+  // User may also adjust writable_file_max_buffer_size to optimize disk I/O
+  // size.
   //
   // Default: false
   bool skip_table_builder_flush = false;
-  
+
   // We currently have three versions:
   // 0 -- This version is currently written out by all RocksDB's versions by
   // default.  Can be read by really old RocksDB's. Doesn't support changing

java/src/main/java/org/rocksdb/ColumnFamilyOptionsInterface.java

@@ -231,7 +231,7 @@ public interface ColumnFamilyOptionsInterface {
 
 
   /**
-   * Same as fixed length prefix extractor, except that when slice is 
+   * Same as fixed length prefix extractor, except that when slice is
    * shorter than the fixed length, it will use the full key.
    *
    * @param n use the first n bytes of a key as its prefix.

java/src/main/java/org/rocksdb/DBOptionsInterface.java

@@ -565,7 +565,7 @@ public interface DBOptionsInterface {
    *    are older than WAL_ttl_seconds will be deleted.</li>
    * <li>If both are not 0, WAL files will be checked every 10 min and both
    *    checks will be performed with ttl being first.</li>
-   * </ol> 
+   * </ol>
    *
    * @param sizeLimitMB size limit in mega-bytes.
    * @return the instance of the current Object.

port/port.h

@@ -19,4 +19,3 @@
 #elif defined(OS_WIN)
 #include "port/win/port_win.h"
 #endif
-

port/port_posix.h

@@ -32,14 +32,11 @@
   #else
     #define PLATFORM_IS_LITTLE_ENDIAN false
   #endif
-#elif defined(OS_FREEBSD)
+#elif defined(OS_FREEBSD) || defined(OS_OPENBSD) || defined(OS_NETBSD) || \
+    defined(OS_DRAGONFLYBSD) || defined(OS_ANDROID)
   #include <sys/endian.h>
   #include <sys/types.h>
   #define PLATFORM_IS_LITTLE_ENDIAN (_BYTE_ORDER == _LITTLE_ENDIAN)
-#elif defined(OS_OPENBSD) || defined(OS_NETBSD) ||\
-      defined(OS_DRAGONFLYBSD) || defined(OS_ANDROID)
-  #include <sys/types.h>
-  #include <sys/endian.h>
 #else
   #include <endian.h>
 #endif
@@ -159,4 +156,3 @@ extern int GetMaxOpenFiles();
 
 } // namespace port
 } // namespace rocksdb
-

port/win/env_win.cc

@@ -610,7 +610,7 @@ class WinSequentialFile : public SequentialFile {
   HANDLE file_;
 
   // There is no equivalent of advising away buffered pages as in posix.
-  // To implement this flag we would need to do unbuffered reads which 
+  // To implement this flag we would need to do unbuffered reads which
   // will need to be aligned (not sure there is a guarantee that the buffer
   // passed in is aligned).
   // Hence we currently ignore this flag. It is used only in a few cases
@@ -970,8 +970,7 @@ class WinWritableFile : public WritableFile {
   virtual Status PositionedAppend(const Slice& data, uint64_t offset) override {
     Status s;
 
-    SSIZE_T ret = pwrite(hFile_, data.data(), 
-      data.size(), offset);
+    SSIZE_T ret = pwrite(hFile_, data.data(), data.size(), offset);
 
     // Error break
     if (ret < 0) {

port/win/port_win.cc

@@ -67,7 +67,7 @@ bool CondVar::TimedWait(uint64_t abs_time_us) {
   using namespace std::chrono;
 
   // MSVC++ library implements wait_until in terms of wait_for so
-  // we need to convert absoulte wait into relative wait.
+  // we need to convert absolute wait into relative wait.
   microseconds usAbsTime(abs_time_us);
 
   microseconds usNow(

port/win/win_logger.cc

@@ -10,6 +10,8 @@
 // Logger implementation that can be shared by all environments
 // where enough posix functionality is available.
 
+#include "port/win/win_logger.h"
+
 #include <stdint.h>
 #include <algorithm>
 #include <stdio.h>
@@ -21,7 +23,6 @@
 
 #include <Windows.h>
 
-#include "port/win/win_logger.h"
 #include "port/sys_time.h"
 #include "util/iostats_context_imp.h"
 
@@ -53,8 +54,9 @@ void WinLogger::close() { CloseHandle(file_); }
 void WinLogger::Flush() {
   if (flush_pending_) {
     flush_pending_ = false;
-    // With Windows API writes go to OS buffers directly so no fflush needed unlike 
-    // with C runtime API. We don't flush all the way to disk for perf reasons.
+    // With Windows API writes go to OS buffers directly so no fflush needed
+    // unlike with C runtime API. We don't flush all the way to disk
+    // for perf reasons.
   }
 
   last_flush_micros_ = env_->NowMicros();
@@ -124,7 +126,7 @@ void WinLogger::Logv(const char* format, va_list ap) {
     assert(p <= limit);
     const size_t write_size = p - base;
 
-    DWORD bytesWritten = 0;    
+    DWORD bytesWritten = 0;
     BOOL ret = WriteFile(file_, base, write_size, &bytesWritten, NULL);
     if (ret == FALSE) {
       std::string errSz = GetWindowsErrSz(GetLastError());
@@ -141,8 +143,9 @@ void WinLogger::Logv(const char* format, va_list ap) {
         static_cast<uint64_t>(now_tv.tv_sec) * 1000000 + now_tv.tv_usec;
     if (now_micros - last_flush_micros_ >= flush_every_seconds_ * 1000000) {
       flush_pending_ = false;
-      // With Windows API writes go to OS buffers directly so no fflush needed unlike 
-      // with C runtime API. We don't flush all the way to disk for perf reasons.
+      // With Windows API writes go to OS buffers directly so no fflush needed
+      // unlike with C runtime API. We don't flush all the way to disk
+      // for perf reasons.
       last_flush_micros_ = now_micros;
     }
     break;

table/plain_table_factory.cc

@@ -21,8 +21,8 @@ Status PlainTableFactory::NewTableReader(
   return PlainTableReader::Open(
       table_reader_options.ioptions, table_reader_options.env_options,
       table_reader_options.internal_comparator, std::move(file), file_size,
-      table, table_options_.bloom_bits_per_key, table_options_.hash_table_ratio, 
-      table_options_.index_sparseness, table_options_.huge_page_tlb_size, 
+      table, table_options_.bloom_bits_per_key, table_options_.hash_table_ratio,
+      table_options_.index_sparseness, table_options_.huge_page_tlb_size,
       table_options_.full_scan_mode);
 }
 
@@ -36,8 +36,8 @@ TableBuilder* PlainTableFactory::NewTableBuilder(
   return new PlainTableBuilder(
       table_builder_options.ioptions,
       table_builder_options.int_tbl_prop_collector_factories, column_family_id,
-      file, table_options_.user_key_len, table_options_.encoding_type, 
-      table_options_.index_sparseness, table_options_.bloom_bits_per_key, 6, 
+      file, table_options_.user_key_len, table_options_.encoding_type,
+      table_options_.index_sparseness, table_options_.bloom_bits_per_key, 6,
       table_options_.huge_page_tlb_size, table_options_.hash_table_ratio,
       table_options_.store_index_in_file);
 }

table/plain_table_factory.h

@@ -151,7 +151,7 @@ class PlainTableFactory : public TableFactory {
                         unique_ptr<RandomAccessFileReader>&& file,
                         uint64_t file_size,
                         unique_ptr<TableReader>* table) const override;
-  
+
   TableBuilder* NewTableBuilder(
       const TableBuilderOptions& table_builder_options,
       uint32_t column_family_id, WritableFileWriter* file) const override;

third-party/gtest-1.7.0/fused-src/gtest/gtest-all.cc

@@ -2592,7 +2592,7 @@ class Hunk {
   // Print a unified diff header for one hunk.
   // The format is
   //   "@@ -<left_start>,<left_length> +<right_start>,<right_length> @@"
-  // where the left/right parts are ommitted if unnecessary.
+  // where the left/right parts are omitted if unnecessary.
   void PrintHeader(std::ostream* ss) const {
     *ss << "@@ ";
     if (removes_) {

util/env.cc

@@ -296,8 +296,8 @@ void AssignEnvOptions(EnvOptions* env_options, const DBOptions& options) {
   env_options->random_access_max_buffer_size =
       options.random_access_max_buffer_size;
   env_options->rate_limiter = options.rate_limiter.get();
-  env_options->writable_file_max_buffer_size = 
-                  options.writable_file_max_buffer_size;
+  env_options->writable_file_max_buffer_size =
+      options.writable_file_max_buffer_size;
   env_options->allow_fallocate = options.allow_fallocate;
 }
 

util/options_helper.cc

@@ -1153,7 +1153,7 @@ std::string ParsePlainTableOptions(const std::string& name,
                                    const std::string& org_value,
                                    PlainTableOptions* new_option,
                                    bool input_strings_escaped = false) {
-  const std::string& value = 
+  const std::string& value =
       input_strings_escaped ? UnescapeOptionString(org_value) : org_value;
   const auto iter = plain_table_type_info.find(name);
   if (iter == plain_table_type_info.end()) {
@@ -1239,7 +1239,7 @@ Status GetPlainTableOptionsFromString(
   if (!s.ok()) {
     return s;
   }
-  return GetPlainTableOptionsFromMap(table_options, opts_map, 
+  return GetPlainTableOptionsFromMap(table_options, opts_map,
                                      new_table_options);
 }
 
@@ -1384,8 +1384,8 @@ Status GetTableFactoryFromMap(
     return Status::OK();
   } else if (factory_name == PlainTableFactory().Name()) {
     PlainTableOptions pt_opt;
-    s = GetPlainTableOptionsFromMap(PlainTableOptions(), opt_map, 
-                                    &pt_opt, true);
+    s = GetPlainTableOptionsFromMap(PlainTableOptions(), opt_map, &pt_opt,
+                                    true);
     if (!s.ok()) {
       return s;
     }

util/options_test.cc

@@ -535,10 +535,11 @@ TEST_F(OptionsTest, GetPlainTableOptionsFromString) {
              &new_opt));
 
   // unrecognized EncodingType
-  ASSERT_NOK(GetPlainTableOptionsFromString(table_opt,
-             "user_key_len=66;bloom_bits_per_key=20;hash_table_ratio=0.5;"
-             "encoding_type=kPrefixXX",
-             &new_opt));  
+  ASSERT_NOK(GetPlainTableOptionsFromString(
+      table_opt,
+      "user_key_len=66;bloom_bits_per_key=20;hash_table_ratio=0.5;"
+      "encoding_type=kPrefixXX",
+      &new_opt));
 }
 #endif  // !ROCKSDB_LITE
 

utilities/merge_operators/string_append/stringappend.cc

@@ -55,6 +55,3 @@ std::shared_ptr<MergeOperator> MergeOperators::CreateStringAppendOperator() {
 }
 
 } // namespace rocksdb
-
-
-

utilities/merge_operators/string_append/stringappend.h

@@ -12,7 +12,8 @@ namespace rocksdb {
 
 class StringAppendOperator : public AssociativeMergeOperator {
  public:
-  StringAppendOperator(char delim_char);    /// Constructor: specify delimiter
+  // Constructor: specify delimiter
+  explicit StringAppendOperator(char delim_char);
 
   virtual bool Merge(const Slice& key,
                      const Slice* existing_value,
@@ -28,4 +29,3 @@ class StringAppendOperator : public AssociativeMergeOperator {
 };
 
 } // namespace rocksdb
-

utilities/merge_operators/string_append/stringappend2.cc

@@ -110,4 +110,3 @@ MergeOperators::CreateStringAppendTESTOperator() {
 }
 
 } // namespace rocksdb
-

utilities/redis/redis_list_iterator.h

@@ -37,8 +37,8 @@
  * @author Deon Nicholas (dnicholas@fb.com)
  */
 
-#ifndef ROCKSDB_LITE
 #pragma once
+#ifndef ROCKSDB_LITE
 
 #include <string>
 
@@ -65,7 +65,7 @@ class RedisListIterator {
   ///  e) result_ will always contain data_[0..cur_byte_) and a header
   ///  f) Whenever corrupt data is encountered or an invalid operation is
   ///      attempted, a RedisListException will immediately be thrown.
-  RedisListIterator(const std::string& list_data)
+  explicit RedisListIterator(const std::string& list_data)
       : data_(list_data.data()),
         num_bytes_(static_cast<uint32_t>(list_data.size())),
         cur_byte_(0),
@@ -73,7 +73,6 @@ class RedisListIterator {
         cur_elem_length_(0),
         length_(0),
         result_() {
-
     // Initialize the result_ (reserve enough space for header)
     InitializeResult();
 
@@ -269,7 +268,7 @@ class RedisListIterator {
                    data_+cur_byte_+ sizeof(uint32_t) + cur_elem_length_);
   }
 
-  /// Will ThrowError() if neccessary.
+  /// Will ThrowError() if necessary.
   /// Checks for common/ubiquitous errors that can arise after most operations.
   /// This method should be called before any reading operation.
   /// If this function succeeds, then we are guaranteed to be in a valid state.