formatting

rocksdb-sys/build.rs

@@ -27,12 +27,14 @@ fn build_rocksdb() {
     config.define("NDEBUG", Some("1"));
     config.define("SNAPPY", Some("1"));
 
-    let mut lib_sources = include_str!("rocksdb_lib_sources.txt").split(" ").collect::<Vec<&'static str>>();
+    let mut lib_sources = include_str!("rocksdb_lib_sources.txt")
+        .split(" ")
+        .collect::<Vec<&'static str>>();
 
     // We have a pregenerated a version of build_version.cc in the local directory
-    lib_sources = lib_sources.iter().cloned().filter(|file| {
-            *file != "util/build_version.cc"
-        })
+    lib_sources = lib_sources.iter()
+        .cloned()
+        .filter(|file| *file != "util/build_version.cc")
         .collect::<Vec<&'static str>>();
 
     if cfg!(target_os = "macos") {
@@ -45,7 +47,7 @@ fn build_rocksdb() {
         config.define("OS_LINUX", Some("1"));
         config.define("ROCKSDB_PLATFORM_POSIX", Some("1"));
         config.define("ROCKSDB_LIB_IO_POSIX", Some("1"));
-        //COMMON_FLAGS="$COMMON_FLAGS -fno-builtin-memcmp"
+        // COMMON_FLAGS="$COMMON_FLAGS -fno-builtin-memcmp"
     }
     if cfg!(target_os = "freebsd") {
         config.define("OS_FREEBSD", Some("1"));
@@ -58,12 +60,14 @@ fn build_rocksdb() {
         config.define("OS_WIN", Some("1"));
 
         // Remove POSIX-specific sources
-        lib_sources = lib_sources.iter().cloned().filter(|file| {
+        lib_sources = lib_sources.iter()
+            .cloned()
+            .filter(|file| {
                 match *file {
                     "port/port_posix.cc" |
                     "util/env_posix.cc" |
                     "util/io_posix.cc" => false,
-                    _ => true
+                    _ => true,
                 }
             })
             .collect::<Vec<&'static str>>();

rocksdb-sys/src/lib.rs

@@ -29,35 +29,59 @@ use libc::*;
 extern "C" {
     // Database operations
 
-    pub fn rocksdb_open(options: *const rocksdb_options_t, name: *const c_char, errptr: *mut *mut c_char) -> *mut rocksdb_t;
-
-    pub fn rocksdb_open_for_read_only(options: *const rocksdb_options_t, name: *const c_char, error_if_log_file_exist: c_uchar, errptr: *mut *mut c_char) -> *mut rocksdb_t;
-
-    pub fn rocksdb_backup_engine_open(options: *const rocksdb_options_t, path: *const c_char, errptr: *mut *mut c_char) -> *mut rocksdb_backup_engine_t;
-
-    pub fn rocksdb_backup_engine_create_new_backup(be: *mut rocksdb_backup_engine_t, db: *mut rocksdb_t, errptr: *mut *mut c_char);
-
-    pub fn rocksdb_backup_engine_purge_old_backups(be: *mut rocksdb_backup_engine_t, num_backups_to_keep: uint32_t, errptr: *mut *mut c_char);
+    pub fn rocksdb_open(options: *const rocksdb_options_t,
+                        name: *const c_char,
+                        errptr: *mut *mut c_char)
+                        -> *mut rocksdb_t;
+
+    pub fn rocksdb_open_for_read_only(options: *const rocksdb_options_t,
+                                      name: *const c_char,
+                                      error_if_log_file_exist: c_uchar,
+                                      errptr: *mut *mut c_char)
+                                      -> *mut rocksdb_t;
+
+    pub fn rocksdb_backup_engine_open(options: *const rocksdb_options_t,
+                                      path: *const c_char,
+                                      errptr: *mut *mut c_char)
+                                      -> *mut rocksdb_backup_engine_t;
+
+    pub fn rocksdb_backup_engine_create_new_backup(be: *mut rocksdb_backup_engine_t,
+                                                   db: *mut rocksdb_t,
+                                                   errptr: *mut *mut c_char);
+
+    pub fn rocksdb_backup_engine_purge_old_backups(be: *mut rocksdb_backup_engine_t,
+                                                   num_backups_to_keep: uint32_t,
+                                                   errptr: *mut *mut c_char);
 
     pub fn rocksdb_restore_options_create() -> *mut rocksdb_restore_options_t;
 
     pub fn rocksdb_restore_options_destroy(opt: *mut rocksdb_restore_options_t);
 
-    pub fn rocksdb_restore_options_set_keep_log_files(opt: *mut rocksdb_restore_options_t, v: c_int);
+    pub fn rocksdb_restore_options_set_keep_log_files(opt: *mut rocksdb_restore_options_t,
+                                                      v: c_int);
 
     pub fn rocksdb_backup_engine_restore_db_from_latest_backup(be: *mut rocksdb_backup_engine_t, db_dir: *const c_char, wal_dir: *const c_char, restore_options: *const rocksdb_restore_options_t, errptr: *mut *mut c_char);
 
-    pub fn rocksdb_backup_engine_get_backup_info(be: *mut rocksdb_backup_engine_t) -> *const rocksdb_backup_engine_info_t;
+    pub fn rocksdb_backup_engine_get_backup_info(be: *mut rocksdb_backup_engine_t)
+                                                 -> *const rocksdb_backup_engine_info_t;
 
     pub fn rocksdb_backup_engine_info_count(info: *const rocksdb_backup_engine_info_t) -> c_int;
 
-    pub fn rocksdb_backup_engine_info_timestamp(info: *const rocksdb_backup_engine_info_t, index: c_int) -> int64_t;
+    pub fn rocksdb_backup_engine_info_timestamp(info: *const rocksdb_backup_engine_info_t,
+                                                index: c_int)
+                                                -> int64_t;
 
-    pub fn rocksdb_backup_engine_info_backup_id(info: *const rocksdb_backup_engine_info_t, index: c_int) -> uint32_t;
+    pub fn rocksdb_backup_engine_info_backup_id(info: *const rocksdb_backup_engine_info_t,
+                                                index: c_int)
+                                                -> uint32_t;
 
-    pub fn rocksdb_backup_engine_info_size(info: *const rocksdb_backup_engine_info_t, index: c_int) -> uint64_t;
+    pub fn rocksdb_backup_engine_info_size(info: *const rocksdb_backup_engine_info_t,
+                                           index: c_int)
+                                           -> uint64_t;
 
-    pub fn rocksdb_backup_engine_info_number_files(info: *const rocksdb_backup_engine_info_t, index: c_int) -> uint32_t;
+    pub fn rocksdb_backup_engine_info_number_files(info: *const rocksdb_backup_engine_info_t,
+                                                   index: c_int)
+                                                   -> uint32_t;
 
     pub fn rocksdb_backup_engine_info_destroy(info: *const rocksdb_backup_engine_info_t);
 
@@ -67,45 +91,131 @@ extern "C" {
 
     pub fn rocksdb_open_for_read_only_column_families(options: *const rocksdb_options_t, name: *const c_char, num_column_families: c_int, column_family_names: *const *const c_char, column_family_options: *const *const rocksdb_options_t, column_family_handles: *mut *mut rocksdb_column_family_handle_t, error_if_log_file_exist: c_uchar, errptr: *mut *mut c_char) -> *mut rocksdb_t;
 
-    pub fn rocksdb_list_column_families(options: *const rocksdb_options_t, name: *const c_char, lencf: *mut size_t, errptr: *mut *mut c_char) -> *mut *mut c_char;
+    pub fn rocksdb_list_column_families(options: *const rocksdb_options_t,
+                                        name: *const c_char,
+                                        lencf: *mut size_t,
+                                        errptr: *mut *mut c_char)
+                                        -> *mut *mut c_char;
 
     pub fn rocksdb_list_column_families_destroy(list: *mut *mut c_char, len: size_t);
 
-    pub fn rocksdb_create_column_family(db: *mut rocksdb_t, column_family_options: *const rocksdb_options_t, column_family_name: *const c_char, errptr: *mut *mut c_char) -> *mut rocksdb_column_family_handle_t;
+    pub fn rocksdb_create_column_family(db: *mut rocksdb_t,
+                                        column_family_options: *const rocksdb_options_t,
+                                        column_family_name: *const c_char,
+                                        errptr: *mut *mut c_char)
+                                        -> *mut rocksdb_column_family_handle_t;
 
-    pub fn rocksdb_drop_column_family(db: *mut rocksdb_t, handle: *mut rocksdb_column_family_handle_t, errptr: *mut *mut c_char);
+    pub fn rocksdb_drop_column_family(db: *mut rocksdb_t,
+                                      handle: *mut rocksdb_column_family_handle_t,
+                                      errptr: *mut *mut c_char);
 
     pub fn rocksdb_column_family_handle_destroy(handle: *mut rocksdb_column_family_handle_t);
 
     pub fn rocksdb_close(db: *mut rocksdb_t);
 
-    pub fn rocksdb_put(db: *mut rocksdb_t, options: *const rocksdb_writeoptions_t, key: *const c_char, keylen: size_t, val: *const c_char, vallen: size_t, errptr: *mut *mut c_char);
-
-    pub fn rocksdb_put_cf(db: *mut rocksdb_t, options: *const rocksdb_writeoptions_t, column_family: *mut rocksdb_column_family_handle_t, key: *const c_char, keylen: size_t, val: *const c_char, vallen: size_t, errptr: *mut *mut c_char);
-
-    pub fn rocksdb_delete(db: *mut rocksdb_t, options: *const rocksdb_writeoptions_t, key: *const c_char, keylen: size_t, errptr: *mut *mut c_char);
-
-    pub fn rocksdb_delete_cf(db: *mut rocksdb_t, options: *const rocksdb_writeoptions_t, column_family: *mut rocksdb_column_family_handle_t, key: *const c_char, keylen: size_t, errptr: *mut *mut c_char);
-
-    pub fn rocksdb_merge(db: *mut rocksdb_t, options: *const rocksdb_writeoptions_t, key: *const c_char, keylen: size_t, val: *const c_char, vallen: size_t, errptr: *mut *mut c_char);
-
-    pub fn rocksdb_merge_cf(db: *mut rocksdb_t, options: *const rocksdb_writeoptions_t, column_family: *mut rocksdb_column_family_handle_t, key: *const c_char, keylen: size_t, val: *const c_char, vallen: size_t, errptr: *mut *mut c_char);
-
-    pub fn rocksdb_write(db: *mut rocksdb_t, options: *const rocksdb_writeoptions_t, batch: *mut rocksdb_writebatch_t, errptr: *mut *mut c_char);
-
-    pub fn rocksdb_get(db: *mut rocksdb_t, options: *const rocksdb_readoptions_t, key: *const c_char, keylen: size_t, vallen: *mut size_t, errptr: *mut *mut c_char) -> *mut c_char;
-
-    pub fn rocksdb_get_cf(db: *mut rocksdb_t, options: *const rocksdb_readoptions_t, column_family: *mut rocksdb_column_family_handle_t, key: *const c_char, keylen: size_t, vallen: *mut size_t, errptr: *mut *mut c_char) -> *mut c_char;
-
-    pub fn rocksdb_multi_get(db: *mut rocksdb_t, options: *const rocksdb_readoptions_t, num_keys: size_t, keys_list: *const *const c_char, keys_list_sizes: *const size_t, values_list: *mut *mut c_char, values_list_sizes: *mut size_t, errs: *mut *mut c_char);
-
-    pub fn rocksdb_multi_get_cf(db: *mut rocksdb_t, options: *const rocksdb_readoptions_t, column_families: *const *const rocksdb_column_family_handle_t, num_keys: size_t, keys_list: *const *const c_char, keys_list_sizes: *const size_t, values_list: *mut *mut c_char, values_list_sizes: *mut size_t, errs: *mut *mut c_char);
-
-    pub fn rocksdb_create_iterator(db: *mut rocksdb_t, options: *const rocksdb_readoptions_t) -> *mut rocksdb_iterator_t;
-
-    pub fn rocksdb_create_iterator_cf(db: *mut rocksdb_t, options: *const rocksdb_readoptions_t, column_family: *mut rocksdb_column_family_handle_t) -> *mut rocksdb_iterator_t;
-
-    pub fn rocksdb_create_iterators(db: *mut rocksdb_t, opts: *mut rocksdb_readoptions_t, column_families: *mut *mut rocksdb_column_family_handle_t, iterators: *mut *mut rocksdb_iterator_t, size: size_t, errptr: *mut *mut c_char);
+    pub fn rocksdb_put(db: *mut rocksdb_t,
+                       options: *const rocksdb_writeoptions_t,
+                       key: *const c_char,
+                       keylen: size_t,
+                       val: *const c_char,
+                       vallen: size_t,
+                       errptr: *mut *mut c_char);
+
+    pub fn rocksdb_put_cf(db: *mut rocksdb_t,
+                          options: *const rocksdb_writeoptions_t,
+                          column_family: *mut rocksdb_column_family_handle_t,
+                          key: *const c_char,
+                          keylen: size_t,
+                          val: *const c_char,
+                          vallen: size_t,
+                          errptr: *mut *mut c_char);
+
+    pub fn rocksdb_delete(db: *mut rocksdb_t,
+                          options: *const rocksdb_writeoptions_t,
+                          key: *const c_char,
+                          keylen: size_t,
+                          errptr: *mut *mut c_char);
+
+    pub fn rocksdb_delete_cf(db: *mut rocksdb_t,
+                             options: *const rocksdb_writeoptions_t,
+                             column_family: *mut rocksdb_column_family_handle_t,
+                             key: *const c_char,
+                             keylen: size_t,
+                             errptr: *mut *mut c_char);
+
+    pub fn rocksdb_merge(db: *mut rocksdb_t,
+                         options: *const rocksdb_writeoptions_t,
+                         key: *const c_char,
+                         keylen: size_t,
+                         val: *const c_char,
+                         vallen: size_t,
+                         errptr: *mut *mut c_char);
+
+    pub fn rocksdb_merge_cf(db: *mut rocksdb_t,
+                            options: *const rocksdb_writeoptions_t,
+                            column_family: *mut rocksdb_column_family_handle_t,
+                            key: *const c_char,
+                            keylen: size_t,
+                            val: *const c_char,
+                            vallen: size_t,
+                            errptr: *mut *mut c_char);
+
+    pub fn rocksdb_write(db: *mut rocksdb_t,
+                         options: *const rocksdb_writeoptions_t,
+                         batch: *mut rocksdb_writebatch_t,
+                         errptr: *mut *mut c_char);
+
+    pub fn rocksdb_get(db: *mut rocksdb_t,
+                       options: *const rocksdb_readoptions_t,
+                       key: *const c_char,
+                       keylen: size_t,
+                       vallen: *mut size_t,
+                       errptr: *mut *mut c_char)
+                       -> *mut c_char;
+
+    pub fn rocksdb_get_cf(db: *mut rocksdb_t,
+                          options: *const rocksdb_readoptions_t,
+                          column_family: *mut rocksdb_column_family_handle_t,
+                          key: *const c_char,
+                          keylen: size_t,
+                          vallen: *mut size_t,
+                          errptr: *mut *mut c_char)
+                          -> *mut c_char;
+
+    pub fn rocksdb_multi_get(db: *mut rocksdb_t,
+                             options: *const rocksdb_readoptions_t,
+                             num_keys: size_t,
+                             keys_list: *const *const c_char,
+                             keys_list_sizes: *const size_t,
+                             values_list: *mut *mut c_char,
+                             values_list_sizes: *mut size_t,
+                             errs: *mut *mut c_char);
+
+    pub fn rocksdb_multi_get_cf(db: *mut rocksdb_t,
+                                options: *const rocksdb_readoptions_t,
+                                column_families: *const *const rocksdb_column_family_handle_t,
+                                num_keys: size_t,
+                                keys_list: *const *const c_char,
+                                keys_list_sizes: *const size_t,
+                                values_list: *mut *mut c_char,
+                                values_list_sizes: *mut size_t,
+                                errs: *mut *mut c_char);
+
+    pub fn rocksdb_create_iterator(db: *mut rocksdb_t,
+                                   options: *const rocksdb_readoptions_t)
+                                   -> *mut rocksdb_iterator_t;
+
+    pub fn rocksdb_create_iterator_cf(db: *mut rocksdb_t,
+                                      options: *const rocksdb_readoptions_t,
+                                      column_family: *mut rocksdb_column_family_handle_t)
+                                      -> *mut rocksdb_iterator_t;
+
+    pub fn rocksdb_create_iterators(db: *mut rocksdb_t,
+                                    opts: *mut rocksdb_readoptions_t,
+                                    column_families: *mut *mut rocksdb_column_family_handle_t,
+                                    iterators: *mut *mut rocksdb_iterator_t,
+                                    size: size_t,
+                                    errptr: *mut *mut c_char);
 
     pub fn rocksdb_create_snapshot(db: *mut rocksdb_t) -> *const rocksdb_snapshot_t;
 
@@ -113,31 +223,64 @@ extern "C" {
 
     pub fn rocksdb_property_value(db: *mut rocksdb_t, propname: *const c_char) -> *mut c_char;
 
-    pub fn rocksdb_property_value_cf(db: *mut rocksdb_t, column_family: *mut rocksdb_column_family_handle_t, propname: *const c_char) -> *mut c_char;
-
-    pub fn rocksdb_approximate_sizes(db: *mut rocksdb_t, num_ranges: c_int, range_start_key: *const *const c_char, range_start_key_len: *const size_t, range_limit_key: *const *const c_char, range_limit_key_len: *const size_t, sizes: *mut uint64_t);
-
-    pub fn rocksdb_approximate_sizes_cf(db: *mut rocksdb_t, column_family: *mut rocksdb_column_family_handle_t, num_ranges: c_int, range_start_key: *const *const c_char, range_start_key_len: *const size_t, range_limit_key: *const *const c_char, range_limit_key_len: *const size_t, sizes: *mut uint64_t);
-
-    pub fn rocksdb_compact_range(db: *mut rocksdb_t, start_key: *const c_char, start_key_len: size_t, limit_key: *const c_char, limit_key_len: size_t);
-
-    pub fn rocksdb_compact_range_cf(db: *mut rocksdb_t, column_family: *mut rocksdb_column_family_handle_t, start_key: *const c_char, start_key_len: size_t, limit_key: *const c_char, limit_key_len: size_t);
+    pub fn rocksdb_property_value_cf(db: *mut rocksdb_t,
+                                     column_family: *mut rocksdb_column_family_handle_t,
+                                     propname: *const c_char)
+                                     -> *mut c_char;
+
+    pub fn rocksdb_approximate_sizes(db: *mut rocksdb_t,
+                                     num_ranges: c_int,
+                                     range_start_key: *const *const c_char,
+                                     range_start_key_len: *const size_t,
+                                     range_limit_key: *const *const c_char,
+                                     range_limit_key_len: *const size_t,
+                                     sizes: *mut uint64_t);
+
+    pub fn rocksdb_approximate_sizes_cf(db: *mut rocksdb_t,
+                                        column_family: *mut rocksdb_column_family_handle_t,
+                                        num_ranges: c_int,
+                                        range_start_key: *const *const c_char,
+                                        range_start_key_len: *const size_t,
+                                        range_limit_key: *const *const c_char,
+                                        range_limit_key_len: *const size_t,
+                                        sizes: *mut uint64_t);
+
+    pub fn rocksdb_compact_range(db: *mut rocksdb_t,
+                                 start_key: *const c_char,
+                                 start_key_len: size_t,
+                                 limit_key: *const c_char,
+                                 limit_key_len: size_t);
+
+    pub fn rocksdb_compact_range_cf(db: *mut rocksdb_t,
+                                    column_family: *mut rocksdb_column_family_handle_t,
+                                    start_key: *const c_char,
+                                    start_key_len: size_t,
+                                    limit_key: *const c_char,
+                                    limit_key_len: size_t);
 
     pub fn rocksdb_delete_file(db: *mut rocksdb_t, name: *const c_char);
 
     pub fn rocksdb_livefiles(db: *mut rocksdb_t) -> *const rocksdb_livefiles_t;
 
-    pub fn rocksdb_flush(db: *mut rocksdb_t, options: *const rocksdb_flushoptions_t, errptr: *mut *mut c_char);
+    pub fn rocksdb_flush(db: *mut rocksdb_t,
+                         options: *const rocksdb_flushoptions_t,
+                         errptr: *mut *mut c_char);
 
     pub fn rocksdb_disable_file_deletions(db: *mut rocksdb_t, errptr: *mut *mut c_char);
 
-    pub fn rocksdb_enable_file_deletions(db: *mut rocksdb_t, force: c_uchar, errptr: *mut *mut c_char);
+    pub fn rocksdb_enable_file_deletions(db: *mut rocksdb_t,
+                                         force: c_uchar,
+                                         errptr: *mut *mut c_char);
 
     // Management operations
 
-    pub fn rocksdb_destroy_db(options: *const rocksdb_options_t, name: *const c_char, errptr: *mut *mut c_char);
+    pub fn rocksdb_destroy_db(options: *const rocksdb_options_t,
+                              name: *const c_char,
+                              errptr: *mut *mut c_char);
 
-    pub fn rocksdb_repair_db(options: *const rocksdb_options_t, name: *const c_char, errptr: *mut *mut c_char);
+    pub fn rocksdb_repair_db(options: *const rocksdb_options_t,
+                             name: *const c_char,
+                             errptr: *mut *mut c_char);
 
     // Iterator
 
@@ -155,9 +298,13 @@ extern "C" {
 
     pub fn rocksdb_iter_prev(iterator: *mut rocksdb_iterator_t);
 
-    pub fn rocksdb_iter_key(iterator: *const rocksdb_iterator_t, klen: *mut size_t) -> *const c_char;
+    pub fn rocksdb_iter_key(iterator: *const rocksdb_iterator_t,
+                            klen: *mut size_t)
+                            -> *const c_char;
 
-    pub fn rocksdb_iter_value(iterator: *const rocksdb_iterator_t, vlen: *mut size_t) -> *const c_char;
+    pub fn rocksdb_iter_value(iterator: *const rocksdb_iterator_t,
+                              vlen: *mut size_t)
+                              -> *const c_char;
 
     pub fn rocksdb_iter_get_error(iterator: *const rocksdb_iterator_t, errptr: *mut *mut c_char);
 
@@ -165,7 +312,9 @@ extern "C" {
 
     pub fn rocksdb_writebatch_create() -> *mut rocksdb_writebatch_t;
 
-    pub fn rocksdb_writebatch_create_from(rep: *const c_char, size: size_t) -> *mut rocksdb_writebatch_t;
+    pub fn rocksdb_writebatch_create_from(rep: *const c_char,
+                                          size: size_t)
+                                          -> *mut rocksdb_writebatch_t;
 
     pub fn rocksdb_writebatch_destroy(batch: *mut rocksdb_writebatch_t);
 
@@ -173,35 +322,104 @@ extern "C" {
 
     pub fn rocksdb_writebatch_count(batch: *mut rocksdb_writebatch_t) -> c_int;
 
-    pub fn rocksdb_writebatch_put(batch: *mut rocksdb_writebatch_t, key: *const c_char, klen: size_t, val: *const c_char, vlen: size_t);
-
-    pub fn rocksdb_writebatch_put_cf(batch: *mut rocksdb_writebatch_t, column_family: *mut rocksdb_column_family_handle_t, key: *const c_char, klen: size_t, val: *const c_char, vlen: size_t);
-
-    pub fn rocksdb_writebatch_putv(b: *mut rocksdb_writebatch_t, num_keys: c_int, keys_list: *const *const c_char, keys_list_sizes: *const size_t, num_values: c_int, values_list: *const *const c_char, values_list_sizes: *const size_t);
-
-    pub fn rocksdb_writebatch_putv_cf(b: *mut rocksdb_writebatch_t, column_family: *mut rocksdb_column_family_handle_t, num_keys: c_int, keys_list: *const *const c_char, keys_list_sizes: *const size_t, num_values: c_int, values_list: *const *const c_char, values_list_sizes: *const size_t);
-
-    pub fn rocksdb_writebatch_merge(batch: *mut rocksdb_writebatch_t, key: *const c_char, klen: size_t, val: *const c_char, vlen: size_t);
-
-    pub fn rocksdb_writebatch_merge_cf(batch: *mut rocksdb_writebatch_t, column_family: *mut rocksdb_column_family_handle_t, key: *const c_char, klen: size_t, val: *const c_char, vlen: size_t);
-
-    pub fn rocksdb_writebatch_mergev(b: *mut rocksdb_writebatch_t, num_keys: c_int, keys_list: *const *const c_char, keys_list_sizes: *const size_t, num_values: c_int, values_list: *const *const c_char, values_list_sizes: *const size_t);
-
-    pub fn rocksdb_writebatch_mergev_cf(b: *mut rocksdb_writebatch_t, column_family: *mut rocksdb_column_family_handle_t, num_keys: c_int, keys_list: *const *const c_char, keys_list_sizes: *const size_t, num_values: c_int, values_list: *const *const c_char, values_list_sizes: *const size_t);
-
-    pub fn rocksdb_writebatch_delete(batch: *mut rocksdb_writebatch_t, key: *const c_char, klen: size_t);
-
-    pub fn rocksdb_writebatch_delete_cf(batch: *mut rocksdb_writebatch_t, column_family: *mut rocksdb_column_family_handle_t, key: *const c_char, klen: size_t);
-
-    pub fn rocksdb_writebatch_deletev(b: *mut rocksdb_writebatch_t, num_keys: c_int, keys_list: *const *const c_char, keys_list_sizes: *const size_t);
-
-    pub fn rocksdb_writebatch_deletev_cf(b: *mut rocksdb_writebatch_t, column_family: *mut rocksdb_column_family_handle_t, num_keys: c_int, keys_list: *const *const c_char, keys_list_sizes: *const size_t);
-
-    pub fn rocksdb_writebatch_put_log_data(batch: *mut rocksdb_writebatch_t, blob: *const c_char, len: size_t);
-
-    pub fn rocksdb_writebatch_iterate(batch: *mut rocksdb_writebatch_t, state: *mut c_void, put: Option<unsafe extern "C" fn(state: *mut c_void, k: *const c_char, klen: size_t, v: *const c_char, vlen: size_t)>, deleted: Option<unsafe extern "C" fn(state: *mut c_void, k: *const c_char, klen: size_t)>);
-
-    pub fn rocksdb_writebatch_data(batch: *mut rocksdb_writebatch_t, size: *mut size_t) -> *const c_char;
+    pub fn rocksdb_writebatch_put(batch: *mut rocksdb_writebatch_t,
+                                  key: *const c_char,
+                                  klen: size_t,
+                                  val: *const c_char,
+                                  vlen: size_t);
+
+    pub fn rocksdb_writebatch_put_cf(batch: *mut rocksdb_writebatch_t,
+                                     column_family: *mut rocksdb_column_family_handle_t,
+                                     key: *const c_char,
+                                     klen: size_t,
+                                     val: *const c_char,
+                                     vlen: size_t);
+
+    pub fn rocksdb_writebatch_putv(b: *mut rocksdb_writebatch_t,
+                                   num_keys: c_int,
+                                   keys_list: *const *const c_char,
+                                   keys_list_sizes: *const size_t,
+                                   num_values: c_int,
+                                   values_list: *const *const c_char,
+                                   values_list_sizes: *const size_t);
+
+    pub fn rocksdb_writebatch_putv_cf(b: *mut rocksdb_writebatch_t,
+                                      column_family: *mut rocksdb_column_family_handle_t,
+                                      num_keys: c_int,
+                                      keys_list: *const *const c_char,
+                                      keys_list_sizes: *const size_t,
+                                      num_values: c_int,
+                                      values_list: *const *const c_char,
+                                      values_list_sizes: *const size_t);
+
+    pub fn rocksdb_writebatch_merge(batch: *mut rocksdb_writebatch_t,
+                                    key: *const c_char,
+                                    klen: size_t,
+                                    val: *const c_char,
+                                    vlen: size_t);
+
+    pub fn rocksdb_writebatch_merge_cf(batch: *mut rocksdb_writebatch_t,
+                                       column_family: *mut rocksdb_column_family_handle_t,
+                                       key: *const c_char,
+                                       klen: size_t,
+                                       val: *const c_char,
+                                       vlen: size_t);
+
+    pub fn rocksdb_writebatch_mergev(b: *mut rocksdb_writebatch_t,
+                                     num_keys: c_int,
+                                     keys_list: *const *const c_char,
+                                     keys_list_sizes: *const size_t,
+                                     num_values: c_int,
+                                     values_list: *const *const c_char,
+                                     values_list_sizes: *const size_t);
+
+    pub fn rocksdb_writebatch_mergev_cf(b: *mut rocksdb_writebatch_t,
+                                        column_family: *mut rocksdb_column_family_handle_t,
+                                        num_keys: c_int,
+                                        keys_list: *const *const c_char,
+                                        keys_list_sizes: *const size_t,
+                                        num_values: c_int,
+                                        values_list: *const *const c_char,
+                                        values_list_sizes: *const size_t);
+
+    pub fn rocksdb_writebatch_delete(batch: *mut rocksdb_writebatch_t,
+                                     key: *const c_char,
+                                     klen: size_t);
+
+    pub fn rocksdb_writebatch_delete_cf(batch: *mut rocksdb_writebatch_t,
+                                        column_family: *mut rocksdb_column_family_handle_t,
+                                        key: *const c_char,
+                                        klen: size_t);
+
+    pub fn rocksdb_writebatch_deletev(b: *mut rocksdb_writebatch_t,
+                                      num_keys: c_int,
+                                      keys_list: *const *const c_char,
+                                      keys_list_sizes: *const size_t);
+
+    pub fn rocksdb_writebatch_deletev_cf(b: *mut rocksdb_writebatch_t,
+                                         column_family: *mut rocksdb_column_family_handle_t,
+                                         num_keys: c_int,
+                                         keys_list: *const *const c_char,
+                                         keys_list_sizes: *const size_t);
+
+    pub fn rocksdb_writebatch_put_log_data(batch: *mut rocksdb_writebatch_t,
+                                           blob: *const c_char,
+                                           len: size_t);
+
+    pub fn rocksdb_writebatch_iterate(batch: *mut rocksdb_writebatch_t,
+                                      state: *mut c_void,
+                                      put: Option<unsafe extern "C" fn(state: *mut c_void,
+                                                                       k: *const c_char,
+                                                                       klen: size_t,
+                                                                       v: *const c_char,
+                                                                       vlen: size_t)>,
+                                      deleted: Option<unsafe extern "C" fn(state: *mut c_void,
+                                                                           k: *const c_char,
+                                                                           klen: size_t)>);
+
+    pub fn rocksdb_writebatch_data(batch: *mut rocksdb_writebatch_t,
+                                   size: *mut size_t)
+                                   -> *const c_char;
 
     // Block-based table options
 
@@ -233,7 +451,9 @@ extern "C" {
 
     pub fn rocksdb_block_based_options_set_cache_index_and_filter_blocks(options: *mut rocksdb_block_based_table_options_t, v: c_uchar);
 
-    pub fn rocksdb_block_based_options_set_pin_l0_filter_and_index_blocks_in_cache(options: *mut rocksdb_block_based_table_options_t, v: c_uchar);
+    pub fn rocksdb_block_based_options_set_pin_l0_filter_and_index_blocks_in_cache
+        (options: *mut rocksdb_block_based_table_options_t,
+         v: c_uchar);
 
     pub fn rocksdb_block_based_options_set_skip_table_builder_flush(options: *mut rocksdb_block_based_table_options_t, skip_table_builder_flush: c_uchar);
 
@@ -245,15 +465,18 @@ extern "C" {
 
     pub fn rocksdb_cuckoo_options_destroy(options: *mut rocksdb_cuckoo_table_options_t);
 
-    pub fn rocksdb_cuckoo_options_set_hash_ratio(options: *mut rocksdb_cuckoo_table_options_t, v: f64);
+    pub fn rocksdb_cuckoo_options_set_hash_ratio(options: *mut rocksdb_cuckoo_table_options_t,
+                                                 v: f64);
 
-    pub fn rocksdb_cuckoo_options_set_max_search_depth(options: *mut rocksdb_cuckoo_table_options_t, v: uint32_t);
+    pub fn rocksdb_cuckoo_options_set_max_search_depth(options: *mut rocksdb_cuckoo_table_options_t,
+                                                       v: uint32_t);
 
     pub fn rocksdb_cuckoo_options_set_cuckoo_block_size(options: *mut rocksdb_cuckoo_table_options_t, v: uint32_t);
 
     pub fn rocksdb_cuckoo_options_set_identity_as_first_hash(options: *mut rocksdb_cuckoo_table_options_t, v: c_uchar);
 
-    pub fn rocksdb_cuckoo_options_set_use_module_hash(options: *mut rocksdb_cuckoo_table_options_t, v: c_uchar);
+    pub fn rocksdb_cuckoo_options_set_use_module_hash(options: *mut rocksdb_cuckoo_table_options_t,
+                                                      v: c_uchar);
 
     pub fn rocksdb_options_set_cuckoo_table_factory(opt: *mut rocksdb_options_t, table_options: *mut rocksdb_cuckoo_table_options_t);
 
@@ -263,31 +486,41 @@ extern "C" {
 
     pub fn rocksdb_options_destroy(opt: *mut rocksdb_options_t);
 
-    pub fn rocksdb_options_increase_parallelism(opt: *mut rocksdb_options_t, total_threads: c_int);
+    pub fn rocksdb_options_increase_parallelism(opt: *mut rocksdb_options_t,
+                                                total_threads: c_int);
 
-    pub fn rocksdb_options_optimize_for_point_lookup(opt: *mut rocksdb_options_t, block_cache_size_mb: uint64_t);
+    pub fn rocksdb_options_optimize_for_point_lookup(opt: *mut rocksdb_options_t,
+                                                     block_cache_size_mb: uint64_t);
 
-    pub fn rocksdb_options_optimize_level_style_compaction(opt: *mut rocksdb_options_t, memtable_memory_budget: uint64_t);
+    pub fn rocksdb_options_optimize_level_style_compaction(opt: *mut rocksdb_options_t,
+                                                           memtable_memory_budget: uint64_t);
 
-    pub fn rocksdb_options_optimize_universal_style_compaction(opt: *mut rocksdb_options_t, memtable_memory_budget: uint64_t);
+    pub fn rocksdb_options_optimize_universal_style_compaction(opt: *mut rocksdb_options_t,
+                                                               memtable_memory_budget: uint64_t);
 
-    pub fn rocksdb_options_set_compaction_filter(opt: *mut rocksdb_options_t, filter: *mut rocksdb_compactionfilter_t);
+    pub fn rocksdb_options_set_compaction_filter(opt: *mut rocksdb_options_t,
+                                                 filter: *mut rocksdb_compactionfilter_t);
 
     pub fn rocksdb_options_set_compaction_filter_factory(opt: *mut rocksdb_options_t, factory: *mut rocksdb_compactionfilterfactory_t);
 
     pub fn rocksdb_options_compaction_readahead_size(opt: *mut rocksdb_options_t, s: size_t);
 
-    pub fn rocksdb_options_set_comparator(opt: *mut rocksdb_options_t, cmp: *mut rocksdb_comparator_t);
+    pub fn rocksdb_options_set_comparator(opt: *mut rocksdb_options_t,
+                                          cmp: *mut rocksdb_comparator_t);
 
-    pub fn rocksdb_options_set_merge_operator(opt: *mut rocksdb_options_t, merge_operator: *mut rocksdb_mergeoperator_t);
+    pub fn rocksdb_options_set_merge_operator(opt: *mut rocksdb_options_t,
+                                              merge_operator: *mut rocksdb_mergeoperator_t);
 
     pub fn rocksdb_options_set_uint64add_merge_operator(opt: *mut rocksdb_options_t);
 
-    pub fn rocksdb_options_set_compression_per_level(opt: *mut rocksdb_options_t, level_values: *const c_int, num_levels: size_t);
+    pub fn rocksdb_options_set_compression_per_level(opt: *mut rocksdb_options_t,
+                                                     level_values: *const c_int,
+                                                     num_levels: size_t);
 
     pub fn rocksdb_options_set_create_if_missing(opt: *mut rocksdb_options_t, v: c_uchar);
 
-    pub fn rocksdb_options_set_create_missing_column_families(opt: *mut rocksdb_options_t, v: c_uchar);
+    pub fn rocksdb_options_set_create_missing_column_families(opt: *mut rocksdb_options_t,
+                                                              v: c_uchar);
 
     pub fn rocksdb_options_set_error_if_exists(opt: *mut rocksdb_options_t, v: c_uchar);
 
@@ -307,15 +540,22 @@ extern "C" {
 
     pub fn rocksdb_options_set_max_total_wal_size(opt: *mut rocksdb_options_t, n: uint64_t);
 
-    pub fn rocksdb_options_set_compression_options(opt: *mut rocksdb_options_t, w_bits: c_int, level: c_int, strategy: c_int, max_dict_bytes: c_int);
+    pub fn rocksdb_options_set_compression_options(opt: *mut rocksdb_options_t,
+                                                   w_bits: c_int,
+                                                   level: c_int,
+                                                   strategy: c_int,
+                                                   max_dict_bytes: c_int);
 
-    pub fn rocksdb_options_set_prefix_extractor(opt: *mut rocksdb_options_t, prefix_extractor: *mut rocksdb_slicetransform_t);
+    pub fn rocksdb_options_set_prefix_extractor(opt: *mut rocksdb_options_t,
+                                                prefix_extractor: *mut rocksdb_slicetransform_t);
 
     pub fn rocksdb_options_set_num_levels(opt: *mut rocksdb_options_t, n: c_int);
 
-    pub fn rocksdb_options_set_level0_file_num_compaction_trigger(opt: *mut rocksdb_options_t, n: c_int);
+    pub fn rocksdb_options_set_level0_file_num_compaction_trigger(opt: *mut rocksdb_options_t,
+                                                                  n: c_int);
 
-    pub fn rocksdb_options_set_level0_slowdown_writes_trigger(opt: *mut rocksdb_options_t, n: c_int);
+    pub fn rocksdb_options_set_level0_slowdown_writes_trigger(opt: *mut rocksdb_options_t,
+                                                              n: c_int);
 
     pub fn rocksdb_options_set_level0_stop_writes_trigger(opt: *mut rocksdb_options_t, n: c_int);
 
@@ -327,11 +567,13 @@ extern "C" {
 
     pub fn rocksdb_options_set_max_bytes_for_level_base(opt: *mut rocksdb_options_t, n: uint64_t);
 
-    pub fn rocksdb_options_set_max_bytes_for_level_multiplier(opt: *mut rocksdb_options_t, n: c_int);
+    pub fn rocksdb_options_set_max_bytes_for_level_multiplier(opt: *mut rocksdb_options_t,
+                                                              n: c_int);
 
     pub fn rocksdb_options_set_expanded_compaction_factor(opt: *mut rocksdb_options_t, v: c_int);
 
-    pub fn rocksdb_options_set_max_grandparent_overlap_factor(opt: *mut rocksdb_options_t, v: c_int);
+    pub fn rocksdb_options_set_max_grandparent_overlap_factor(opt: *mut rocksdb_options_t,
+                                                              v: c_int);
 
     pub fn rocksdb_options_set_max_bytes_for_level_multiplier_additional(opt: *mut rocksdb_options_t, level_values: *mut c_int, num_levels: size_t);
 
@@ -341,9 +583,11 @@ extern "C" {
 
     pub fn rocksdb_options_set_max_write_buffer_number(opt: *mut rocksdb_options_t, n: c_int);
 
-    pub fn rocksdb_options_set_min_write_buffer_number_to_merge(opt: *mut rocksdb_options_t, n: c_int);
+    pub fn rocksdb_options_set_min_write_buffer_number_to_merge(opt: *mut rocksdb_options_t,
+                                                                n: c_int);
 
-    pub fn rocksdb_options_set_max_write_buffer_number_to_maintain(opt: *mut rocksdb_options_t, n: c_int);
+    pub fn rocksdb_options_set_max_write_buffer_number_to_maintain(opt: *mut rocksdb_options_t,
+                                                                   n: c_int);
 
     pub fn rocksdb_options_set_max_background_compactions(opt: *mut rocksdb_options_t, n: c_int);
 
@@ -361,13 +605,15 @@ extern "C" {
 
     pub fn rocksdb_options_set_hard_rate_limit(opt: *mut rocksdb_options_t, v: f64);
 
-    pub fn rocksdb_options_set_rate_limit_delay_max_milliseconds(opt: *mut rocksdb_options_t, v: c_uint);
+    pub fn rocksdb_options_set_rate_limit_delay_max_milliseconds(opt: *mut rocksdb_options_t,
+                                                                 v: c_uint);
 
     pub fn rocksdb_options_set_max_manifest_file_size(opt: *mut rocksdb_options_t, v: size_t);
 
     pub fn rocksdb_options_set_table_cache_numshardbits(opt: *mut rocksdb_options_t, v: c_int);
 
-    pub fn rocksdb_options_set_table_cache_remove_scan_count_limit(opt: *mut rocksdb_options_t, v: c_int);
+    pub fn rocksdb_options_set_table_cache_remove_scan_count_limit(opt: *mut rocksdb_options_t,
+                                                                   v: c_int);
 
     pub fn rocksdb_options_set_arena_block_size(opt: *mut rocksdb_options_t, v: size_t);
 
@@ -381,9 +627,11 @@ extern "C" {
 
     pub fn rocksdb_options_set_WAL_size_limit_MB(opt: *mut rocksdb_options_t, limit: uint64_t);
 
-    pub fn rocksdb_options_set_manifest_preallocation_size(opt: *mut rocksdb_options_t, v: size_t);
+    pub fn rocksdb_options_set_manifest_preallocation_size(opt: *mut rocksdb_options_t,
+                                                           v: size_t);
 
-    pub fn rocksdb_options_set_purge_redundant_kvs_while_flush(opt: *mut rocksdb_options_t, v: c_uchar);
+    pub fn rocksdb_options_set_purge_redundant_kvs_while_flush(opt: *mut rocksdb_options_t,
+                                                               v: c_uchar);
 
     pub fn rocksdb_options_set_allow_os_buffer(opt: *mut rocksdb_options_t, v: c_uchar);
 
@@ -393,29 +641,34 @@ extern "C" {
 
     pub fn rocksdb_options_set_is_fd_close_on_exec(opt: *mut rocksdb_options_t, v: c_uchar);
 
-    pub fn rocksdb_options_set_skip_log_error_on_recovery(opt: *mut rocksdb_options_t, v: c_uchar);
+    pub fn rocksdb_options_set_skip_log_error_on_recovery(opt: *mut rocksdb_options_t,
+                                                          v: c_uchar);
 
     pub fn rocksdb_options_set_stats_dump_period_sec(opt: *mut rocksdb_options_t, v: c_uint);
 
     pub fn rocksdb_options_set_advise_random_on_open(opt: *mut rocksdb_options_t, v: c_uchar);
 
-    pub fn rocksdb_options_set_access_hint_on_compaction_start(opt: *mut rocksdb_options_t, v: c_int);
+    pub fn rocksdb_options_set_access_hint_on_compaction_start(opt: *mut rocksdb_options_t,
+                                                               v: c_int);
 
     pub fn rocksdb_options_set_use_adaptive_mutex(opt: *mut rocksdb_options_t, v: c_uchar);
 
     pub fn rocksdb_options_set_bytes_per_sync(opt: *mut rocksdb_options_t, v: uint64_t);
 
-    pub fn rocksdb_options_set_verify_checksums_in_compaction(opt: *mut rocksdb_options_t, v: c_uchar);
+    pub fn rocksdb_options_set_verify_checksums_in_compaction(opt: *mut rocksdb_options_t,
+                                                              v: c_uchar);
 
     pub fn rocksdb_options_set_filter_deletes(opt: *mut rocksdb_options_t, v: c_uchar);
 
-    pub fn rocksdb_options_set_max_sequential_skip_in_iterations(opt: *mut rocksdb_options_t, v: uint64_t);
+    pub fn rocksdb_options_set_max_sequential_skip_in_iterations(opt: *mut rocksdb_options_t,
+                                                                 v: uint64_t);
 
     pub fn rocksdb_options_set_disable_data_sync(opt: *mut rocksdb_options_t, v: c_int);
 
     pub fn rocksdb_options_set_disable_auto_compactions(opt: *mut rocksdb_options_t, v: c_int);
 
-    pub fn rocksdb_options_set_delete_obsolete_files_period_micros(opt: *mut rocksdb_options_t, v: uint64_t);
+    pub fn rocksdb_options_set_delete_obsolete_files_period_micros(opt: *mut rocksdb_options_t,
+                                                                   v: uint64_t);
 
     pub fn rocksdb_options_set_source_compaction_factor(opt: *mut rocksdb_options_t, v: c_int);
 
@@ -423,23 +676,34 @@ extern "C" {
 
     pub fn rocksdb_options_set_memtable_vector_rep(opt: *mut rocksdb_options_t);
 
-    pub fn rocksdb_options_set_hash_skip_list_rep(opt: *mut rocksdb_options_t, bucket_count: size_t, skiplist_height: int32_t, skiplist_branching_factor: int32_t);
+    pub fn rocksdb_options_set_hash_skip_list_rep(opt: *mut rocksdb_options_t,
+                                                  bucket_count: size_t,
+                                                  skiplist_height: int32_t,
+                                                  skiplist_branching_factor: int32_t);
 
-    pub fn rocksdb_options_set_hash_link_list_rep(opt: *mut rocksdb_options_t, bucket_count: size_t);
+    pub fn rocksdb_options_set_hash_link_list_rep(opt: *mut rocksdb_options_t,
+                                                  bucket_count: size_t);
 
-    pub fn rocksdb_options_set_plain_table_factory(opt: *mut rocksdb_options_t, user_key_len: uint32_t, bloom_bits_per_key: c_int, hash_table_ratio: f64, index_sparseness: size_t);
+    pub fn rocksdb_options_set_plain_table_factory(opt: *mut rocksdb_options_t,
+                                                   user_key_len: uint32_t,
+                                                   bloom_bits_per_key: c_int,
+                                                   hash_table_ratio: f64,
+                                                   index_sparseness: size_t);
 
     pub fn rocksdb_options_set_min_level_to_compress(opt: *mut rocksdb_options_t, level: c_int);
 
-    pub fn rocksdb_options_set_memtable_prefix_bloom_bits(opt: *mut rocksdb_options_t, v: uint32_t);
+    pub fn rocksdb_options_set_memtable_prefix_bloom_bits(opt: *mut rocksdb_options_t,
+                                                          v: uint32_t);
 
-    pub fn rocksdb_options_set_memtable_prefix_bloom_probes(opt: *mut rocksdb_options_t, v: uint32_t);
+    pub fn rocksdb_options_set_memtable_prefix_bloom_probes(opt: *mut rocksdb_options_t,
+                                                            v: uint32_t);
 
     pub fn rocksdb_options_set_memtable_huge_page_size(opt: *mut rocksdb_options_t, v: size_t);
 
     pub fn rocksdb_options_set_max_successive_merges(opt: *mut rocksdb_options_t, v: size_t);
 
-    pub fn rocksdb_options_set_min_partial_merge_operands(opt: *mut rocksdb_options_t, v: uint32_t);
+    pub fn rocksdb_options_set_min_partial_merge_operands(opt: *mut rocksdb_options_t,
+                                                          v: uint32_t);
 
     pub fn rocksdb_options_set_bloom_locality(opt: *mut rocksdb_options_t, v: uint32_t);
 
@@ -457,13 +721,29 @@ extern "C" {
 
     pub fn rocksdb_options_set_universal_compaction_options(opt: *mut rocksdb_options_t, uco: *mut rocksdb_universal_compaction_options_t);
 
-    pub fn rocksdb_options_set_fifo_compaction_options(opt: *mut rocksdb_options_t, fifo: *mut rocksdb_fifo_compaction_options_t);
+    pub fn rocksdb_options_set_fifo_compaction_options(opt: *mut rocksdb_options_t,
+                                                       fifo: *mut rocksdb_fifo_compaction_options_t);
 
     // Compaction filter
 
-    pub fn rocksdb_compactionfilter_create(state: *mut c_void, destructor: Option<unsafe extern "C" fn(state: *mut c_void)>, filter: Option<unsafe extern "C" fn(state: *mut c_void, level: c_int, key: *const c_char, key_length: size_t, existing_value: *const c_char, value_length: size_t, new_value: *mut *mut c_char, new_value_length: *mut size_t, value_changed: *mut c_uchar) -> c_uchar>, name: Option<unsafe extern "C" fn(state: *mut c_void) -> *const c_char>) -> *mut rocksdb_compactionfilter_t;
-
-    pub fn rocksdb_compactionfilter_set_ignore_snapshots(filter: *mut rocksdb_compactionfilter_t, v: c_uchar);
+    pub fn rocksdb_compactionfilter_create
+        (state: *mut c_void,
+         destructor: Option<unsafe extern "C" fn(state: *mut c_void)>,
+         filter: Option<unsafe extern "C" fn(state: *mut c_void,
+                                             level: c_int,
+                                             key: *const c_char,
+                                             key_length: size_t,
+                                             existing_value: *const c_char,
+                                             value_length: size_t,
+                                             new_value: *mut *mut c_char,
+                                             new_value_length: *mut size_t,
+                                             value_changed: *mut c_uchar)
+                                             -> c_uchar>,
+         name: Option<unsafe extern "C" fn(state: *mut c_void) -> *const c_char>)
+         -> *mut rocksdb_compactionfilter_t;
+
+    pub fn rocksdb_compactionfilter_set_ignore_snapshots(filter: *mut rocksdb_compactionfilter_t,
+                                                         v: c_uchar);
 
     pub fn rocksdb_compactionfilter_destroy(filter: *mut rocksdb_compactionfilter_t);
 
@@ -481,7 +761,17 @@ extern "C" {
 
     // Comparator
 
-    pub fn rocksdb_comparator_create(state: *mut c_void, destructor: Option<unsafe extern "C" fn(state: *mut c_void)>, compare: Option<unsafe extern "C" fn(state: *mut c_void, a: *const c_char, alen: size_t, b: *const c_char, blen: size_t) -> c_int>, name: Option<unsafe extern "C" fn(state: *mut c_void) -> *const c_char>) -> *mut rocksdb_comparator_t;
+    pub fn rocksdb_comparator_create(state: *mut c_void,
+                                     destructor: Option<unsafe extern "C" fn(state: *mut c_void)>,
+                                     compare: Option<unsafe extern "C" fn(state: *mut c_void,
+                                                                          a: *const c_char,
+                                                                          alen: size_t,
+                                                                          b: *const c_char,
+                                                                          blen: size_t)
+                                                                          -> c_int>,
+                                     name: Option<unsafe extern "C" fn(state: *mut c_void)
+                                                                       -> *const c_char>)
+                                     -> *mut rocksdb_comparator_t;
 
     pub fn rocksdb_comparator_destroy(cmp: *mut rocksdb_comparator_t);
 
@@ -511,9 +801,12 @@ extern "C" {
 
     pub fn rocksdb_readoptions_set_fill_cache(opt: *mut rocksdb_readoptions_t, v: c_uchar);
 
-    pub fn rocksdb_readoptions_set_snapshot(opt: *mut rocksdb_readoptions_t, v: *const rocksdb_snapshot_t);
+    pub fn rocksdb_readoptions_set_snapshot(opt: *mut rocksdb_readoptions_t,
+                                            v: *const rocksdb_snapshot_t);
 
-    pub fn rocksdb_readoptions_set_iterate_upper_bound(opt: *mut rocksdb_readoptions_t, key: *const c_char, keylen: size_t);
+    pub fn rocksdb_readoptions_set_iterate_upper_bound(opt: *mut rocksdb_readoptions_t,
+                                                       key: *const c_char,
+                                                       keylen: size_t);
 
     pub fn rocksdb_readoptions_set_read_tier(opt: *mut rocksdb_readoptions_t, v: c_int);
 
@@ -573,7 +866,9 @@ extern "C" {
 
     // Universal Compaction options
 
-    pub fn rocksdb_universal_compaction_options_create() -> *mut rocksdb_universal_compaction_options_t;
+    pub fn rocksdb_universal_compaction_options_create
+        ()
+        -> *mut rocksdb_universal_compaction_options_t;
 
     pub fn rocksdb_universal_compaction_options_set_size_ratio(uco: *mut rocksdb_universal_compaction_options_t, ratio: c_int);
 
@@ -581,9 +876,13 @@ extern "C" {
 
     pub fn rocksdb_universal_compaction_options_set_max_merge_width(uco: *mut rocksdb_universal_compaction_options_t, w: c_int);
 
-    pub fn rocksdb_universal_compaction_options_set_max_size_amplification_percent(uco: *mut rocksdb_universal_compaction_options_t, p: c_int);
+    pub fn rocksdb_universal_compaction_options_set_max_size_amplification_percent
+        (uco: *mut rocksdb_universal_compaction_options_t,
+         p: c_int);
 
-    pub fn rocksdb_universal_compaction_options_set_compression_size_percent(uco: *mut rocksdb_universal_compaction_options_t, p: c_int);
+    pub fn rocksdb_universal_compaction_options_set_compression_size_percent
+        (uco: *mut rocksdb_universal_compaction_options_t,
+         p: c_int);
 
     pub fn rocksdb_universal_compaction_options_set_stop_style(uco: *mut rocksdb_universal_compaction_options_t, style: c_int);
 
@@ -597,25 +896,47 @@ extern "C" {
 
     pub fn rocksdb_livefiles_count(files: *const rocksdb_livefiles_t) -> c_int;
 
-    pub fn rocksdb_livefiles_name(files: *const rocksdb_livefiles_t, index: c_int) -> *const c_char;
+    pub fn rocksdb_livefiles_name(files: *const rocksdb_livefiles_t,
+                                  index: c_int)
+                                  -> *const c_char;
 
     pub fn rocksdb_livefiles_level(files: *const rocksdb_livefiles_t, index: c_int) -> c_int;
 
     pub fn rocksdb_livefiles_size(files: *const rocksdb_livefiles_t, index: c_int) -> size_t;
 
-    pub fn rocksdb_livefiles_smallestkey(files: *const rocksdb_livefiles_t, index: c_int, size: *mut size_t) -> *const c_char;
+    pub fn rocksdb_livefiles_smallestkey(files: *const rocksdb_livefiles_t,
+                                         index: c_int,
+                                         size: *mut size_t)
+                                         -> *const c_char;
 
-    pub fn rocksdb_livefiles_largestkey(files: *const rocksdb_livefiles_t, index: c_int, size: *mut size_t) -> *const c_char;
+    pub fn rocksdb_livefiles_largestkey(files: *const rocksdb_livefiles_t,
+                                        index: c_int,
+                                        size: *mut size_t)
+                                        -> *const c_char;
 
     pub fn rocksdb_livefiles_destroy(files: *const rocksdb_livefiles_t);
 
     // Utilities
 
-    pub fn rocksdb_get_options_from_string(base_options: *const rocksdb_options_t, opts_str: *const c_char, new_options: *mut rocksdb_options_t, errptr: *mut *mut c_char);
-
-    pub fn rocksdb_delete_file_in_range(db: *mut rocksdb_t, start_key: *const c_char, start_key_len: size_t, limit_key: *const c_char, limit_key_len: size_t, errptr: *mut *mut c_char);
-
-    pub fn rocksdb_delete_file_in_range_cf(db: *mut rocksdb_t, column_family: *mut rocksdb_column_family_handle_t, start_key: *const c_char, start_key_len: size_t, limit_key: *const c_char, limit_key_len: size_t, errptr: *mut *mut c_char);
+    pub fn rocksdb_get_options_from_string(base_options: *const rocksdb_options_t,
+                                           opts_str: *const c_char,
+                                           new_options: *mut rocksdb_options_t,
+                                           errptr: *mut *mut c_char);
+
+    pub fn rocksdb_delete_file_in_range(db: *mut rocksdb_t,
+                                        start_key: *const c_char,
+                                        start_key_len: size_t,
+                                        limit_key: *const c_char,
+                                        limit_key_len: size_t,
+                                        errptr: *mut *mut c_char);
+
+    pub fn rocksdb_delete_file_in_range_cf(db: *mut rocksdb_t,
+                                           column_family: *mut rocksdb_column_family_handle_t,
+                                           start_key: *const c_char,
+                                           start_key_len: size_t,
+                                           limit_key: *const c_char,
+                                           limit_key_len: size_t,
+                                           errptr: *mut *mut c_char);
 
     pub fn rocksdb_free(ptr: *mut c_void);
 }

rocksdb-sys/tests/ffi.rs

@@ -89,10 +89,14 @@ macro_rules! CheckCondition {
 unsafe fn CheckEqual(expected: *const c_char, v: *const c_char, n: size_t) {
     if expected.is_null() && v.is_null() {
         // ok
-    } else if !expected.is_null() && !v.is_null() && n == strlen(expected) && memcmp(expected as *const c_void, v as *const c_void, n) == 0 {
+    } else if !expected.is_null() && !v.is_null() && n == strlen(expected) &&
+       memcmp(expected as *const c_void, v as *const c_void, n) == 0 {
         // ok
     } else {
-        panic!("{}: expected '{}', got '{}'", phase, rstr(strndup(expected, n)), rstr(strndup(v, 5)));
+        panic!("{}: expected '{}', got '{}'",
+               phase,
+               rstr(strndup(expected, n)),
+               rstr(strndup(v, 5)));
     }
 }
 
@@ -103,25 +107,41 @@ unsafe fn Free<T>(ptr: *mut *mut T) {
     }
 }
 
-unsafe fn CheckGet(mut db: *mut rocksdb_t, options: *mut rocksdb_readoptions_t, key: *const c_char, expected: *const c_char) {
+unsafe fn CheckGet(mut db: *mut rocksdb_t,
+                   options: *mut rocksdb_readoptions_t,
+                   key: *const c_char,
+                   expected: *const c_char) {
     let mut err: *mut c_char = ptr::null_mut();
     let mut val_len: size_t = 0;
-    let mut val: *mut c_char = rocksdb_get(db, options, key, strlen(key), &mut val_len, &mut err);
+    let mut val: *mut c_char =
+        rocksdb_get(db, options, key, strlen(key), &mut val_len, &mut err);
     CheckNoError!(err);
     CheckEqual(expected, val, val_len);
     Free(&mut val);
 }
 
-unsafe fn CheckGetCF(db: *mut rocksdb_t, options: *const rocksdb_readoptions_t, handle: *mut rocksdb_column_family_handle_t, key: *const c_char, expected: *const c_char) {
+unsafe fn CheckGetCF(db: *mut rocksdb_t,
+                     options: *const rocksdb_readoptions_t,
+                     handle: *mut rocksdb_column_family_handle_t,
+                     key: *const c_char,
+                     expected: *const c_char) {
     let mut err: *mut c_char = ptr::null_mut();
     let mut val_len: size_t = 0;
-    let mut val: *mut c_char = rocksdb_get_cf(db, options, handle, key, strlen(key), &mut val_len, &mut err);
+    let mut val: *mut c_char = rocksdb_get_cf(db,
+                                              options,
+                                              handle,
+                                              key,
+                                              strlen(key),
+                                              &mut val_len,
+                                              &mut err);
     CheckNoError!(err);
     CheckEqual(expected, val, val_len);
     Free(&mut val);
 }
 
-unsafe fn CheckIter(iter: *mut rocksdb_iterator_t, key: *const c_char, val: *const c_char) {
+unsafe fn CheckIter(iter: *mut rocksdb_iterator_t,
+                    key: *const c_char,
+                    val: *const c_char) {
     let mut len: size_t = 0;
     let mut str: *const c_char;
     str = rocksdb_iter_key(iter, &mut len);
@@ -131,35 +151,50 @@ unsafe fn CheckIter(iter: *mut rocksdb_iterator_t, key: *const c_char, val: *con
 }
 
 // Callback from rocksdb_writebatch_iterate()
-unsafe extern "C" fn CheckPut(ptr: *mut c_void, k: *const c_char, klen: size_t, v: *const c_char, vlen: size_t) {
+unsafe extern "C" fn CheckPut(ptr: *mut c_void,
+                              k: *const c_char,
+                              klen: size_t,
+                              v: *const c_char,
+                              vlen: size_t) {
     let mut state: *mut c_int = ptr as *mut c_int;
     CheckCondition!(*state < 2);
     match *state {
         0 => {
             CheckEqual(cstrp!("bar"), k, klen);
             CheckEqual(cstrp!("b"), v, vlen);
-        },
+        }
         1 => {
             CheckEqual(cstrp!("box"), k, klen);
             CheckEqual(cstrp!("c"), v, vlen);
-        },
-        _ => { },
+        }
+        _ => {}
     }
     *state += 1;
 }
 
 // Callback from rocksdb_writebatch_iterate()
-unsafe extern "C" fn CheckDel(ptr: *mut c_void, k: *const c_char, klen: size_t) {
+unsafe extern "C" fn CheckDel(ptr: *mut c_void,
+                              k: *const c_char,
+                              klen: size_t) {
     let mut state: *mut c_int = ptr as *mut c_int;
     CheckCondition!(*state == 2);
     CheckEqual(cstrp!("bar"), k, klen);
     *state += 1;
 }
 
-unsafe extern "C" fn CmpDestroy(arg: *mut c_void) { }
+unsafe extern "C" fn CmpDestroy(arg: *mut c_void) {}
 
-unsafe extern "C" fn CmpCompare(arg: *mut c_void, a: *const c_char, alen: size_t, b: *const c_char, blen: size_t) -> c_int {
-    let n = if alen < blen { alen } else { blen };
+unsafe extern "C" fn CmpCompare(arg: *mut c_void,
+                                a: *const c_char,
+                                alen: size_t,
+                                b: *const c_char,
+                                blen: size_t)
+                                -> c_int {
+    let n = if alen < blen {
+        alen
+    } else {
+        blen
+    };
     let mut r = memcmp(a as *const c_void, b as *const c_void, n);
     if r == 0 {
         if alen < blen {
@@ -179,38 +214,63 @@ unsafe extern "C" fn CmpName(arg: *mut c_void) -> *const c_char {
 
 static mut fake_filter_result: c_uchar = 1;
 
-unsafe extern "C" fn FilterDestroy(arg: *mut c_void) { }
+unsafe extern "C" fn FilterDestroy(arg: *mut c_void) {}
 
 unsafe extern "C" fn FilterName(arg: *mut c_void) -> *const c_char {
     cstrp!("TestFilter")
 }
 
-unsafe extern "C" fn FilterCreate(arg: *mut c_void, key_array: *const *const c_char, key_length_array: *const size_t, num_keys: c_int, filter_length: *mut size_t) -> *mut c_char {
+unsafe extern "C" fn FilterCreate(arg: *mut c_void,
+                                  key_array: *const *const c_char,
+                                  key_length_array: *const size_t,
+                                  num_keys: c_int,
+                                  filter_length: *mut size_t)
+                                  -> *mut c_char {
     *filter_length = 4;
     let result = malloc(4);
     memcpy(result, cstrp!("fake") as *const c_void, 4);
     result as *mut c_char
 }
 
-unsafe extern "C" fn FilterKeyMatch(arg: *mut c_void, key: *const c_char, length: size_t, filter: *const c_char, filter_length: size_t) -> c_uchar {
+unsafe extern "C" fn FilterKeyMatch(arg: *mut c_void,
+                                    key: *const c_char,
+                                    length: size_t,
+                                    filter: *const c_char,
+                                    filter_length: size_t)
+                                    -> c_uchar {
     CheckCondition!(filter_length == 4);
-    CheckCondition!(memcmp(filter as *const c_void, cstrp!("fake") as *const c_void, filter_length) == 0);
+    CheckCondition!(memcmp(filter as *const c_void,
+                           cstrp!("fake") as *const c_void,
+                           filter_length) == 0);
     fake_filter_result
 }
 
 // Custom compaction filter
 
-unsafe extern "C" fn CFilterDestroy(arg: *mut c_void) { }
+unsafe extern "C" fn CFilterDestroy(arg: *mut c_void) {}
 
 unsafe extern "C" fn CFilterName(arg: *mut c_void) -> *const c_char {
     cstrp!("foo")
 }
 
-unsafe extern "C" fn CFilterFilter(arg: *mut c_void, level: c_int, key: *const c_char, key_length: size_t, existing_value: *const c_char, value_length: size_t, new_value: *mut *mut c_char, new_value_length: *mut size_t, value_changed: *mut u8) -> c_uchar {
+unsafe extern "C" fn CFilterFilter(arg: *mut c_void,
+                                   level: c_int,
+                                   key: *const c_char,
+                                   key_length: size_t,
+                                   existing_value: *const c_char,
+                                   value_length: size_t,
+                                   new_value: *mut *mut c_char,
+                                   new_value_length: *mut size_t,
+                                   value_changed: *mut u8)
+                                   -> c_uchar {
     if key_length == 3 {
-        if memcmp(mem::transmute(key), mem::transmute(cstrp!("bar")), key_length) == 0 {
+        if memcmp(mem::transmute(key),
+                  mem::transmute(cstrp!("bar")),
+                  key_length) == 0 {
             return 1;
-        } else if memcmp(mem::transmute(key), mem::transmute(cstrp!("baz")), key_length) == 0 {
+        } else if memcmp(mem::transmute(key),
+                  mem::transmute(cstrp!("baz")),
+                  key_length) == 0 {
             *value_changed = 1;
             *new_value = cstrp!("newbazvalue") as *mut c_char;
             *new_value_length = 11;
@@ -220,27 +280,53 @@ unsafe extern "C" fn CFilterFilter(arg: *mut c_void, level: c_int, key: *const c
     0
 }
 
-unsafe extern "C" fn CFilterFactoryDestroy(arg: *mut c_void) { }
+unsafe extern "C" fn CFilterFactoryDestroy(arg: *mut c_void) {}
 
 unsafe extern "C" fn CFilterFactoryName(arg: *mut c_void) -> *const c_char {
     cstrp!("foo")
 }
 
 unsafe extern "C" fn CFilterCreate(arg: *mut c_void, context: *mut rocksdb_compactionfiltercontext_t) -> *mut rocksdb_compactionfilter_t {
-    rocksdb_compactionfilter_create(ptr::null_mut(), Some(CFilterDestroy), Some(CFilterFilter), Some(CFilterName))
+    rocksdb_compactionfilter_create(ptr::null_mut(),
+                                    Some(CFilterDestroy),
+                                    Some(CFilterFilter),
+                                    Some(CFilterName))
 }
 
-unsafe fn CheckCompaction(dbname: *const c_char, db: *mut rocksdb_t, options: *const rocksdb_options_t, roptions: *mut rocksdb_readoptions_t, woptions: *mut rocksdb_writeoptions_t) -> *mut rocksdb_t {
+unsafe fn CheckCompaction(dbname: *const c_char,
+                          db: *mut rocksdb_t,
+                          options: *const rocksdb_options_t,
+                          roptions: *mut rocksdb_readoptions_t,
+                          woptions: *mut rocksdb_writeoptions_t)
+                          -> *mut rocksdb_t {
     let mut err: *mut c_char = ptr::null_mut();
     let db = rocksdb_open(options, dbname, &mut err);
     CheckNoError!(err);
-    rocksdb_put(db, woptions, cstrp!("foo"), 3, cstrp!("foovalue"), 8, &mut err);
+    rocksdb_put(db,
+                woptions,
+                cstrp!("foo"),
+                3,
+                cstrp!("foovalue"),
+                8,
+                &mut err);
     CheckNoError!(err);
     CheckGet(db, roptions, cstrp!("foo"), cstrp!("foovalue"));
-    rocksdb_put(db, woptions, cstrp!("bar"), 3, cstrp!("barvalue"), 8, &mut err);
+    rocksdb_put(db,
+                woptions,
+                cstrp!("bar"),
+                3,
+                cstrp!("barvalue"),
+                8,
+                &mut err);
     CheckNoError!(err);
     CheckGet(db, roptions, cstrp!("bar"), cstrp!("barvalue"));
-    rocksdb_put(db, woptions, cstrp!("baz"), 3, cstrp!("bazvalue"), 8, &mut err);
+    rocksdb_put(db,
+                woptions,
+                cstrp!("baz"),
+                3,
+                cstrp!("bazvalue"),
+                8,
+                &mut err);
     CheckNoError!(err);
     CheckGet(db, roptions, cstrp!("baz"), cstrp!("bazvalue"));
 
@@ -255,13 +341,23 @@ unsafe fn CheckCompaction(dbname: *const c_char, db: *mut rocksdb_t, options: *c
 
 // Custom merge operator
 
-unsafe extern "C" fn MergeOperatorDestroy(arg: *mut c_void) { }
+unsafe extern "C" fn MergeOperatorDestroy(arg: *mut c_void) {}
 
 unsafe extern "C" fn MergeOperatorName(arg: *mut c_void) -> *const c_char {
     cstrp!("foo")
 }
 
-unsafe extern "C" fn MergeOperatorFullMerge(arg: *mut c_void, key: *const c_char, key_length: size_t, existing_value: *const c_char, existing_value_length: size_t, operands_list: *const *const c_char, operands_list_length: *const size_t, num_operands: c_int, success: *mut u8, new_value_length: *mut size_t) -> *mut c_char {
+unsafe extern "C" fn MergeOperatorFullMerge(arg: *mut c_void,
+                                            key: *const c_char,
+                                            key_length: size_t,
+                                            existing_value: *const c_char,
+                                            existing_value_length: size_t,
+                                            operands_list: *const *const c_char,
+                                            operands_list_length: *const size_t,
+                                            num_operands: c_int,
+                                            success: *mut u8,
+                                            new_value_length: *mut size_t)
+                                            -> *mut c_char {
     *new_value_length = 4;
     *success = 1;
     let result: *mut c_char = malloc(4) as *mut _;
@@ -308,7 +404,10 @@ fn ffi() {
         let dbbackupname = dbbackupname.as_ptr();
 
         StartPhase("create_objects");
-        cmp = rocksdb_comparator_create(ptr::null_mut(), Some(CmpDestroy), Some(CmpCompare), Some(CmpName));
+        cmp = rocksdb_comparator_create(ptr::null_mut(),
+                                        Some(CmpDestroy),
+                                        Some(CmpCompare),
+                                        Some(CmpName));
         env = rocksdb_create_default_env();
         cache = rocksdb_cache_create_lru(100000);
 
@@ -360,7 +459,13 @@ fn ffi() {
         CheckGet(db, roptions, cstrp!("foo") as *const _, ptr::null());
 
         StartPhase("put");
-        rocksdb_put(db, woptions, cstrp!("foo"), 3, cstrp!("hello"), 5, &mut err);
+        rocksdb_put(db,
+                    woptions,
+                    cstrp!("foo"),
+                    3,
+                    cstrp!("hello"),
+                    5,
+                    &mut err);
         CheckNoError!(err);
         CheckGet(db, roptions, cstrp!("foo"), cstrp!("hello"));
 
@@ -369,27 +474,34 @@ fn ffi() {
             rocksdb_destroy_db(options, dbbackupname, &mut err);
             CheckNoError!(err);
 
-            let be = rocksdb_backup_engine_open(options, dbbackupname, &mut err);
+            let be =
+                rocksdb_backup_engine_open(options, dbbackupname, &mut err);
             CheckNoError!(err);
 
             rocksdb_backup_engine_create_new_backup(be, db, &mut err);
             CheckNoError!(err);
 
             // need a change to trigger a new backup
-            rocksdb_delete(db, woptions, cstrp!("does-not-exist"), 14, &mut err);
+            rocksdb_delete(db,
+                           woptions,
+                           cstrp!("does-not-exist"),
+                           14,
+                           &mut err);
             CheckNoError!(err);
 
             rocksdb_backup_engine_create_new_backup(be, db, &mut err);
             CheckNoError!(err);
 
-            let bei: *const rocksdb_backup_engine_info_t = rocksdb_backup_engine_get_backup_info(be);
+            let bei: *const rocksdb_backup_engine_info_t =
+                rocksdb_backup_engine_get_backup_info(be);
             CheckCondition!(rocksdb_backup_engine_info_count(bei) > 1);
             rocksdb_backup_engine_info_destroy(bei);
 
             rocksdb_backup_engine_purge_old_backups(be, 1, &mut err);
             CheckNoError!(err);
 
-            let bei: *const rocksdb_backup_engine_info_t = rocksdb_backup_engine_get_backup_info(be);
+            let bei: *const rocksdb_backup_engine_info_t =
+                rocksdb_backup_engine_get_backup_info(be);
             CheckCondition!(rocksdb_backup_engine_info_count(bei) == 1);
             rocksdb_backup_engine_info_destroy(bei);
 
@@ -439,7 +551,10 @@ fn ffi() {
             CheckGet(db, roptions, cstrp!("bar"), ptr::null());
             CheckGet(db, roptions, cstrp!("box"), cstrp!("c"));
             let mut pos: c_int = 0;
-            rocksdb_writebatch_iterate(wb, mem::transmute(&mut pos), Some(CheckPut), Some(CheckDel));
+            rocksdb_writebatch_iterate(wb,
+                                       mem::transmute(&mut pos),
+                                       Some(CheckPut),
+                                       Some(CheckDel));
             CheckCondition!(pos == 3);
             rocksdb_writebatch_destroy(wb);
         }
@@ -449,9 +564,16 @@ fn ffi() {
             let wb = rocksdb_writebatch_create();
             let k_list: [*const c_char; 2] = [cstrp!("z"), cstrp!("ap")];
             let k_sizes: [size_t; 2] = [1, 2];
-            let v_list: [*const c_char; 3] = [cstrp!("x"), cstrp!("y"), cstrp!("z")];
+            let v_list: [*const c_char; 3] =
+                [cstrp!("x"), cstrp!("y"), cstrp!("z")];
             let v_sizes: [size_t; 3] = [1, 1, 1];
-            rocksdb_writebatch_putv(wb, k_list.len() as c_int, k_list.as_ptr(), k_sizes.as_ptr(), v_list.len() as c_int, v_list.as_ptr(), v_sizes.as_ptr());
+            rocksdb_writebatch_putv(wb,
+                                    k_list.len() as c_int,
+                                    k_list.as_ptr(),
+                                    k_sizes.as_ptr(),
+                                    v_list.len() as c_int,
+                                    v_list.as_ptr(),
+                                    v_sizes.as_ptr());
             rocksdb_write(db, woptions, wb, &mut err);
             CheckNoError!(err);
             CheckGet(db, roptions, cstrp!("zap"), cstrp!("xyz"));
@@ -469,9 +591,12 @@ fn ffi() {
             rocksdb_writebatch_put(wb1, cstrp!("quux"), 4, cstrp!("e"), 1);
             rocksdb_writebatch_delete(wb1, cstrp!("quux"), 4);
             let mut repsize1: size_t = 0;
-            let mut rep = rocksdb_writebatch_data(wb1, &mut repsize1) as *const c_void;
-            let mut wb2 = rocksdb_writebatch_create_from(rep as *const c_char, repsize1);
-            CheckCondition!(rocksdb_writebatch_count(wb1) == rocksdb_writebatch_count(wb2));
+            let mut rep =
+                rocksdb_writebatch_data(wb1, &mut repsize1) as *const c_void;
+            let mut wb2 = rocksdb_writebatch_create_from(rep as *const c_char,
+                                                         repsize1);
+            CheckCondition!(rocksdb_writebatch_count(wb1) ==
+                            rocksdb_writebatch_count(wb2));
             let mut repsize2: size_t = 0;
             CheckCondition!(memcmp(rep, rocksdb_writebatch_data(wb2, &mut repsize2) as *const c_void, repsize1) == 0);
             rocksdb_writebatch_destroy(wb1);
@@ -502,12 +627,22 @@ fn ffi() {
 
         StartPhase("multiget");
         {
-            let keys: [*const c_char; 3] = [cstrp!("box"), cstrp!("foo"), cstrp!("notfound")];
+            let keys: [*const c_char; 3] =
+                [cstrp!("box"), cstrp!("foo"), cstrp!("notfound")];
             let keys_sizes: [size_t; 3] = [3, 3, 8];
-            let mut vals: [*mut c_char; 3] = [ptr::null_mut(), ptr::null_mut(), ptr::null_mut()];
+            let mut vals: [*mut c_char; 3] =
+                [ptr::null_mut(), ptr::null_mut(), ptr::null_mut()];
             let mut vals_sizes: [size_t; 3] = [0, 0, 0];
-            let mut errs: [*mut c_char; 3] = [ptr::null_mut(), ptr::null_mut(), ptr::null_mut()];
-            rocksdb_multi_get(db, roptions, 3, keys.as_ptr(), keys_sizes.as_ptr(), vals.as_mut_ptr(), vals_sizes.as_mut_ptr(), errs.as_mut_ptr());
+            let mut errs: [*mut c_char; 3] =
+                [ptr::null_mut(), ptr::null_mut(), ptr::null_mut()];
+            rocksdb_multi_get(db,
+                              roptions,
+                              3,
+                              keys.as_ptr(),
+                              keys_sizes.as_ptr(),
+                              vals.as_mut_ptr(),
+                              vals_sizes.as_mut_ptr(),
+                              errs.as_mut_ptr());
 
             for i in 0..3 {
                 CheckEqual(ptr::null(), errs[i], 0);
@@ -515,7 +650,7 @@ fn ffi() {
                     0 => CheckEqual(cstrp!("c"), vals[i], vals_sizes[i]),
                     1 => CheckEqual(cstrp!("hello"), vals[i], vals_sizes[i]),
                     2 => CheckEqual(ptr::null(), vals[i], vals_sizes[i]),
-                    _ => { },
+                    _ => {}
                 }
                 Free(&mut vals[i]);
             }
@@ -524,20 +659,34 @@ fn ffi() {
         StartPhase("approximate_sizes");
         {
             let mut sizes: [uint64_t; 2] = [0, 0];
-            let start: [*const c_char; 2] = [cstrp!("a"), cstrp!("k00000000000000010000")];
+            let start: [*const c_char; 2] = [cstrp!("a"),
+                                             cstrp!("k00000000000000010000")];
             let start_len: [size_t; 2] = [1, 21];
-            let limit: [*const c_char; 2] = [cstrp!("k00000000000000010000"), cstrp!("z")];
+            let limit: [*const c_char; 2] = [cstrp!("k00000000000000010000"),
+                                             cstrp!("z")];
             let limit_len: [size_t; 2] = [21, 1];
             rocksdb_writeoptions_set_sync(woptions, 0);
-            for i in 0 .. 20000 {
+            for i in 0..20000 {
                 let keybuf = CString::new(format!("k{:020}", i)).unwrap();
                 let key = keybuf.to_bytes_with_nul();
                 let valbuf = CString::new(format!("v{:020}", i)).unwrap();
                 let val = valbuf.to_bytes_with_nul();
-                rocksdb_put(db, woptions, key.as_ptr() as *const c_char, key.len() as size_t, val.as_ptr() as *const c_char, val.len() as size_t, &mut err);
+                rocksdb_put(db,
+                            woptions,
+                            key.as_ptr() as *const c_char,
+                            key.len() as size_t,
+                            val.as_ptr() as *const c_char,
+                            val.len() as size_t,
+                            &mut err);
                 CheckNoError!(err);
             }
-            rocksdb_approximate_sizes(db, 2, start.as_ptr(), start_len.as_ptr(), limit.as_ptr(), limit_len.as_ptr(), sizes.as_mut_ptr());
+            rocksdb_approximate_sizes(db,
+                                      2,
+                                      start.as_ptr(),
+                                      start_len.as_ptr(),
+                                      limit.as_ptr(),
+                                      limit_len.as_ptr(),
+                                      sizes.as_mut_ptr());
             CheckCondition!(sizes[0] > 0);
             CheckCondition!(sizes[1] > 0);
         }
@@ -584,26 +733,45 @@ fn ffi() {
         }
 
         StartPhase("filter");
-        for run in 0 .. 2 {
+        for run in 0..2 {
             // First run uses custom filter, second run uses bloom filter
             CheckNoError!(err);
             let mut policy: *mut rocksdb_filterpolicy_t = if run == 0 {
-                rocksdb_filterpolicy_create(ptr::null_mut(), Some(FilterDestroy), Some(FilterCreate), Some(FilterKeyMatch), None, Some(FilterName))
+                rocksdb_filterpolicy_create(ptr::null_mut(),
+                                            Some(FilterDestroy),
+                                            Some(FilterCreate),
+                                            Some(FilterKeyMatch),
+                                            None,
+                                            Some(FilterName))
             } else {
                 rocksdb_filterpolicy_create_bloom(10)
             };
 
-            rocksdb_block_based_options_set_filter_policy(table_options, policy);
+            rocksdb_block_based_options_set_filter_policy(table_options,
+                                                          policy);
 
             // Create new database
             rocksdb_close(db);
             rocksdb_destroy_db(options, dbname, &mut err);
-            rocksdb_options_set_block_based_table_factory(options, table_options);
+            rocksdb_options_set_block_based_table_factory(options,
+                                                          table_options);
             db = rocksdb_open(options, dbname, &mut err);
             CheckNoError!(err);
-            rocksdb_put(db, woptions, cstrp!("foo"), 3, cstrp!("foovalue"), 8, &mut err);
+            rocksdb_put(db,
+                        woptions,
+                        cstrp!("foo"),
+                        3,
+                        cstrp!("foovalue"),
+                        8,
+                        &mut err);
             CheckNoError!(err);
-            rocksdb_put(db, woptions, cstrp!("bar"), 3, cstrp!("barvalue"), 8, &mut err);
+            rocksdb_put(db,
+                        woptions,
+                        cstrp!("bar"),
+                        3,
+                        cstrp!("barvalue"),
+                        8,
+                        &mut err);
             CheckNoError!(err);
             rocksdb_compact_range(db, ptr::null(), 0, ptr::null(), 0);
 
@@ -621,22 +789,32 @@ fn ffi() {
                 CheckGet(db, roptions, cstrp!("bar"), cstrp!("barvalue"));
             }
             // Reset the policy
-            rocksdb_block_based_options_set_filter_policy(table_options, ptr::null_mut());
-            rocksdb_options_set_block_based_table_factory(options, table_options);
+            rocksdb_block_based_options_set_filter_policy(table_options,
+                                                          ptr::null_mut());
+            rocksdb_options_set_block_based_table_factory(options,
+                                                          table_options);
         }
 
         StartPhase("compaction_filter");
         {
             let options_with_filter = rocksdb_options_create();
             rocksdb_options_set_create_if_missing(options_with_filter, 1);
-            let cfilter = rocksdb_compactionfilter_create(ptr::null_mut(), Some(CFilterDestroy), Some(CFilterFilter), Some(CFilterName));
+            let cfilter = rocksdb_compactionfilter_create(ptr::null_mut(),
+                                                          Some(CFilterDestroy),
+                                                          Some(CFilterFilter),
+                                                          Some(CFilterName));
             // Create new database
             rocksdb_close(db);
             rocksdb_destroy_db(options_with_filter, dbname, &mut err);
             rocksdb_options_set_compaction_filter(options_with_filter, cfilter);
-            db = CheckCompaction(dbname, db, options_with_filter, roptions, woptions);
-
-            rocksdb_options_set_compaction_filter(options_with_filter, ptr::null_mut());
+            db = CheckCompaction(dbname,
+                                 db,
+                                 options_with_filter,
+                                 roptions,
+                                 woptions);
+
+            rocksdb_options_set_compaction_filter(options_with_filter,
+                                                  ptr::null_mut());
             rocksdb_compactionfilter_destroy(cfilter);
             rocksdb_options_destroy(options_with_filter);
         }
@@ -644,13 +822,18 @@ fn ffi() {
         StartPhase("compaction_filter_factory");
         {
             let mut options_with_filter_factory = rocksdb_options_create();
-            rocksdb_options_set_create_if_missing(options_with_filter_factory, 1);
+            rocksdb_options_set_create_if_missing(options_with_filter_factory,
+                                                  1);
             let mut factory = rocksdb_compactionfilterfactory_create(ptr::null_mut(), Some(CFilterFactoryDestroy), Some(CFilterCreate), Some(CFilterFactoryName));
             // Create new database
             rocksdb_close(db);
             rocksdb_destroy_db(options_with_filter_factory, dbname, &mut err);
             rocksdb_options_set_compaction_filter_factory(options_with_filter_factory, factory);
-            db = CheckCompaction(dbname, db, options_with_filter_factory, roptions, woptions);
+            db = CheckCompaction(dbname,
+                                 db,
+                                 options_with_filter_factory,
+                                 roptions,
+                                 woptions);
 
             rocksdb_options_set_compaction_filter_factory(options_with_filter_factory, ptr::null_mut());
             rocksdb_options_destroy(options_with_filter_factory);
@@ -658,22 +841,46 @@ fn ffi() {
 
         StartPhase("merge_operator");
         {
-            let mut merge_operator = rocksdb_mergeoperator_create(ptr::null_mut(), Some(MergeOperatorDestroy), Some(MergeOperatorFullMerge), Some(MergeOperatorPartialMerge), None, Some(MergeOperatorName));
+            let mut merge_operator =
+                rocksdb_mergeoperator_create(ptr::null_mut(),
+                                             Some(MergeOperatorDestroy),
+                                             Some(MergeOperatorFullMerge),
+                                             Some(MergeOperatorPartialMerge),
+                                             None,
+                                             Some(MergeOperatorName));
             // Create new database
             rocksdb_close(db);
             rocksdb_destroy_db(options, dbname, &mut err);
             rocksdb_options_set_merge_operator(options, merge_operator);
             db = rocksdb_open(options, dbname, &mut err);
             CheckNoError!(err);
-            rocksdb_put(db, woptions, cstrp!("foo"), 3, cstrp!("foovalue"), 8, &mut err);
+            rocksdb_put(db,
+                        woptions,
+                        cstrp!("foo"),
+                        3,
+                        cstrp!("foovalue"),
+                        8,
+                        &mut err);
             CheckNoError!(err);
             CheckGet(db, roptions, cstrp!("foo"), cstrp!("foovalue"));
-            rocksdb_merge(db, woptions, cstrp!("foo"), 3, cstrp!("barvalue"), 8, &mut err);
+            rocksdb_merge(db,
+                          woptions,
+                          cstrp!("foo"),
+                          3,
+                          cstrp!("barvalue"),
+                          8,
+                          &mut err);
             CheckNoError!(err);
             CheckGet(db, roptions, cstrp!("foo"), cstrp!("fake"));
 
             // Merge of a non-existing value
-            rocksdb_merge(db, woptions, cstrp!("bar"), 3, cstrp!("barvalue"), 8, &mut err);
+            rocksdb_merge(db,
+                          woptions,
+                          cstrp!("bar"),
+                          3,
+                          cstrp!("barvalue"),
+                          8,
+                          &mut err);
             CheckNoError!(err);
             CheckGet(db, roptions, cstrp!("bar"), cstrp!("fake"));
         }
@@ -688,14 +895,21 @@ fn ffi() {
             rocksdb_options_set_create_if_missing(db_options, 1);
             db = rocksdb_open(db_options, dbname, &mut err);
             CheckNoError!(err);
-            let mut cfh = rocksdb_create_column_family(db, db_options, cstrp!("cf1"), & mut err);
+            let mut cfh = rocksdb_create_column_family(db,
+                                                       db_options,
+                                                       cstrp!("cf1"),
+                                                       &mut err);
             rocksdb_column_family_handle_destroy(cfh);
             CheckNoError!(err);
             rocksdb_close(db);
 
             let mut cflen: size_t = 0;
-            let column_fams_raw = rocksdb_list_column_families(db_options, dbname, &mut cflen, &mut err);
-            let column_fams = slice::from_raw_parts(column_fams_raw, cflen as usize);
+            let column_fams_raw = rocksdb_list_column_families(db_options,
+                                                               dbname,
+                                                               &mut cflen,
+                                                               &mut err);
+            let column_fams = slice::from_raw_parts(column_fams_raw,
+                                                    cflen as usize);
             CheckEqual(cstrp!("default"), column_fams[0], 7);
             CheckEqual(cstrp!("cf1"), column_fams[1], 3);
             CheckCondition!(cflen == 2);
@@ -703,27 +917,67 @@ fn ffi() {
 
             let mut cf_options = rocksdb_options_create();
 
-            let cf_names: [*const c_char; 2] = [cstrp!("default"), cstrp!("cf1")];
-            let cf_opts: [*const rocksdb_options_t; 2] = [cf_options, cf_options];
-            let mut handles: [*mut rocksdb_column_family_handle_t; 2] = [ptr::null_mut(), ptr::null_mut()];
-            db = rocksdb_open_column_families(db_options, dbname, 2, cf_names.as_ptr(), cf_opts.as_ptr(), handles.as_mut_ptr(), &mut err);
+            let cf_names: [*const c_char; 2] = [cstrp!("default"),
+                                                cstrp!("cf1")];
+            let cf_opts: [*const rocksdb_options_t; 2] = [cf_options,
+                                                          cf_options];
+            let mut handles: [*mut rocksdb_column_family_handle_t; 2] =
+                [ptr::null_mut(), ptr::null_mut()];
+            db = rocksdb_open_column_families(db_options,
+                                              dbname,
+                                              2,
+                                              cf_names.as_ptr(),
+                                              cf_opts.as_ptr(),
+                                              handles.as_mut_ptr(),
+                                              &mut err);
             CheckNoError!(err);
 
-            rocksdb_put_cf(db, woptions, handles[1], cstrp!("foo"), 3, cstrp!("hello"), 5, &mut err);
+            rocksdb_put_cf(db,
+                           woptions,
+                           handles[1],
+                           cstrp!("foo"),
+                           3,
+                           cstrp!("hello"),
+                           5,
+                           &mut err);
             CheckNoError!(err);
 
-            CheckGetCF(db, roptions, handles[1], cstrp!("foo"), cstrp!("hello"));
-
-            rocksdb_delete_cf(db, woptions, handles[1], cstrp!("foo"), 3, &mut err);
+            CheckGetCF(db,
+                       roptions,
+                       handles[1],
+                       cstrp!("foo"),
+                       cstrp!("hello"));
+
+            rocksdb_delete_cf(db,
+                              woptions,
+                              handles[1],
+                              cstrp!("foo"),
+                              3,
+                              &mut err);
             CheckNoError!(err);
 
             CheckGetCF(db, roptions, handles[1], cstrp!("foo"), ptr::null());
 
             let mut wb = rocksdb_writebatch_create();
-            rocksdb_writebatch_put_cf(wb, handles[1], cstrp!("baz"), 3, cstrp!("a"), 1);
+            rocksdb_writebatch_put_cf(wb,
+                                      handles[1],
+                                      cstrp!("baz"),
+                                      3,
+                                      cstrp!("a"),
+                                      1);
             rocksdb_writebatch_clear(wb);
-            rocksdb_writebatch_put_cf(wb, handles[1], cstrp!("bar"), 3, cstrp!("b"), 1);
-            rocksdb_writebatch_put_cf(wb, handles[1], cstrp!("box"), 3, cstrp!("c"), 1);
+            rocksdb_writebatch_put_cf(wb,
+                                      handles[1],
+                                      cstrp!("bar"),
+                                      3,
+                                      cstrp!("b"),
+                                      1);
+            rocksdb_writebatch_put_cf(wb,
+                                      handles[1],
+                                      cstrp!("box"),
+                                      3,
+                                      cstrp!("c"),
+                                      1);
             rocksdb_writebatch_delete_cf(wb, handles[1], cstrp!("bar"), 3);
             rocksdb_write(db, woptions, wb, &mut err);
             CheckNoError!(err);
@@ -732,21 +986,33 @@ fn ffi() {
             CheckGetCF(db, roptions, handles[1], cstrp!("box"), cstrp!("c"));
             rocksdb_writebatch_destroy(wb);
 
-            let keys: [*const c_char; 3] = [cstrp!("box"), cstrp!("box"), cstrp!("barfooxx")];
-            let get_handles: [*const rocksdb_column_family_handle_t; 3] = [handles[0], handles[1], handles[1]];
+            let keys: [*const c_char; 3] =
+                [cstrp!("box"), cstrp!("box"), cstrp!("barfooxx")];
+            let get_handles: [*const rocksdb_column_family_handle_t; 3] =
+                [handles[0], handles[1], handles[1]];
             let keys_sizes: [size_t; 3] = [3, 3, 8];
-            let mut vals: [*mut c_char; 3] = [ptr::null_mut(), ptr::null_mut(), ptr::null_mut()];
+            let mut vals: [*mut c_char; 3] =
+                [ptr::null_mut(), ptr::null_mut(), ptr::null_mut()];
             let mut vals_sizes: [size_t; 3] = [0, 0, 0];
-            let mut errs: [*mut c_char; 3] = [ptr::null_mut(), ptr::null_mut(), ptr::null_mut()];
-            rocksdb_multi_get_cf(db, roptions, get_handles.as_ptr(), 3, keys.as_ptr(), keys_sizes.as_ptr(), vals.as_mut_ptr(), vals_sizes.as_mut_ptr(), errs.as_mut_ptr());
+            let mut errs: [*mut c_char; 3] =
+                [ptr::null_mut(), ptr::null_mut(), ptr::null_mut()];
+            rocksdb_multi_get_cf(db,
+                                 roptions,
+                                 get_handles.as_ptr(),
+                                 3,
+                                 keys.as_ptr(),
+                                 keys_sizes.as_ptr(),
+                                 vals.as_mut_ptr(),
+                                 vals_sizes.as_mut_ptr(),
+                                 errs.as_mut_ptr());
 
-            for i in 0 .. 3 {
+            for i in 0..3 {
                 CheckEqual(ptr::null(), errs[i], 0);
                 match i {
                     0 => CheckEqual(ptr::null(), vals[i], vals_sizes[i]), // wrong cf
                     1 => CheckEqual(cstrp!("c"), vals[i], vals_sizes[i]), // bingo
                     2 => CheckEqual(ptr::null(), vals[i], vals_sizes[i]), // normal not found
-                    _ => { },
+                    _ => {}
                 }
                 Free(&mut vals[i]);
             }
@@ -767,8 +1033,14 @@ fn ffi() {
             rocksdb_iter_destroy(iter);
 
             let mut iters_cf_handles: [*mut rocksdb_column_family_handle_t; 2] = [handles[0], handles[1]];
-            let mut iters_handles: [*mut rocksdb_iterator_t; 2] = [ptr::null_mut(), ptr::null_mut()];
-            rocksdb_create_iterators(db, roptions, iters_cf_handles.as_mut_ptr(), iters_handles.as_mut_ptr(), 2, &mut err);
+            let mut iters_handles: [*mut rocksdb_iterator_t; 2] =
+                [ptr::null_mut(), ptr::null_mut()];
+            rocksdb_create_iterators(db,
+                                     roptions,
+                                     iters_cf_handles.as_mut_ptr(),
+                                     iters_handles.as_mut_ptr(),
+                                     2,
+                                     &mut err);
             CheckNoError!(err);
 
             iter = iters_handles[0];
@@ -814,17 +1086,53 @@ fn ffi() {
             db = rocksdb_open(options, dbname, &mut err);
             CheckNoError!(err);
 
-            rocksdb_put(db, woptions, cstrp!("foo1"), 4, cstrp!("foo"), 3, &mut err);
+            rocksdb_put(db,
+                        woptions,
+                        cstrp!("foo1"),
+                        4,
+                        cstrp!("foo"),
+                        3,
+                        &mut err);
             CheckNoError!(err);
-            rocksdb_put(db, woptions, cstrp!("foo2"), 4, cstrp!("foo"), 3, &mut err);
+            rocksdb_put(db,
+                        woptions,
+                        cstrp!("foo2"),
+                        4,
+                        cstrp!("foo"),
+                        3,
+                        &mut err);
             CheckNoError!(err);
-            rocksdb_put(db, woptions, cstrp!("foo3"), 4, cstrp!("foo"), 3, &mut err);
+            rocksdb_put(db,
+                        woptions,
+                        cstrp!("foo3"),
+                        4,
+                        cstrp!("foo"),
+                        3,
+                        &mut err);
             CheckNoError!(err);
-            rocksdb_put(db, woptions, cstrp!("bar1"), 4, cstrp!("bar"), 3, &mut err);
+            rocksdb_put(db,
+                        woptions,
+                        cstrp!("bar1"),
+                        4,
+                        cstrp!("bar"),
+                        3,
+                        &mut err);
             CheckNoError!(err);
-            rocksdb_put(db, woptions, cstrp!("bar2"), 4, cstrp!("bar"), 3, &mut err);
+            rocksdb_put(db,
+                        woptions,
+                        cstrp!("bar2"),
+                        4,
+                        cstrp!("bar"),
+                        3,
+                        &mut err);
             CheckNoError!(err);
-            rocksdb_put(db, woptions, cstrp!("bar3"), 4, cstrp!("bar"), 3, &mut err);
+            rocksdb_put(db,
+                        woptions,
+                        cstrp!("bar3"),
+                        4,
+                        cstrp!("bar"),
+                        3,
+                        &mut err);
             CheckNoError!(err);
 
             let mut iter = rocksdb_create_iterator(db, roptions);
@@ -854,7 +1162,8 @@ fn ffi() {
             rocksdb_cuckoo_options_set_hash_ratio(cuckoo_options, 0.5);
             rocksdb_cuckoo_options_set_max_search_depth(cuckoo_options, 200);
             rocksdb_cuckoo_options_set_cuckoo_block_size(cuckoo_options, 10);
-            rocksdb_cuckoo_options_set_identity_as_first_hash(cuckoo_options, 1);
+            rocksdb_cuckoo_options_set_identity_as_first_hash(cuckoo_options,
+                                                              1);
             rocksdb_cuckoo_options_set_use_module_hash(cuckoo_options, 0);
             rocksdb_options_set_cuckoo_table_factory(options, cuckoo_options);
 
@@ -877,16 +1186,36 @@ fn ffi() {
 
             rocksdb_put(db, woptions, cstrp!("a"), 1, cstrp!("0"), 1, &mut err);
             CheckNoError!(err);
-            rocksdb_put(db, woptions, cstrp!("foo"), 3, cstrp!("bar"), 3, &mut err);
+            rocksdb_put(db,
+                        woptions,
+                        cstrp!("foo"),
+                        3,
+                        cstrp!("bar"),
+                        3,
+                        &mut err);
             CheckNoError!(err);
-            rocksdb_put(db, woptions, cstrp!("foo1"), 4, cstrp!("bar1"), 4, &mut err);
+            rocksdb_put(db,
+                        woptions,
+                        cstrp!("foo1"),
+                        4,
+                        cstrp!("bar1"),
+                        4,
+                        &mut err);
             CheckNoError!(err);
-            rocksdb_put(db, woptions, cstrp!("g1"), 2, cstrp!("0"), 1, &mut err);
+            rocksdb_put(db,
+                        woptions,
+                        cstrp!("g1"),
+                        2,
+                        cstrp!("0"),
+                        1,
+                        &mut err);
             CheckNoError!(err);
 
             // testing basic case with no iterate_upper_bound and no prefix_extractor
             {
-                rocksdb_readoptions_set_iterate_upper_bound(roptions, ptr::null(), 0);
+                rocksdb_readoptions_set_iterate_upper_bound(roptions,
+                                                            ptr::null(),
+                                                            0);
                 let mut iter = rocksdb_create_iterator(db, roptions);
 
                 rocksdb_iter_seek(iter, cstrp!("foo"), 3);
@@ -908,7 +1237,9 @@ fn ffi() {
             // to make sure it stops at bound
             {
                 // iterate_upper_bound points beyond the last expected entry
-                rocksdb_readoptions_set_iterate_upper_bound(roptions, cstrp!("foo2"), 4);
+                rocksdb_readoptions_set_iterate_upper_bound(roptions,
+                                                            cstrp!("foo2"),
+                                                            4);
 
                 let mut iter = rocksdb_create_iterator(db, roptions);
 

rustfmt.toml

@@ -1,3 +1,3 @@
 reorder_imports = true
-max_width = 80
-ideal_width = 80
+max_width = 100
+ideal_width = 100

src/comparator.rs

@@ -34,7 +34,12 @@ pub unsafe extern "C" fn name_callback(raw_cb: *mut c_void) -> *const c_char {
     ptr as *const c_char
 }
 
-pub unsafe extern "C" fn compare_callback(raw_cb: *mut c_void, a_raw: *const c_char, a_len: size_t, b_raw: *const c_char, b_len: size_t) -> c_int {
+pub unsafe extern "C" fn compare_callback(raw_cb: *mut c_void,
+                                          a_raw: *const c_char,
+                                          a_len: size_t,
+                                          b_raw: *const c_char,
+                                          b_len: size_t)
+                                          -> c_int {
     let cb: &mut ComparatorCallback = &mut *(raw_cb as *mut ComparatorCallback);
     let a: &[u8] = slice::from_raw_parts(a_raw as *const u8, a_len as usize);
     let b: &[u8] = slice::from_raw_parts(b_raw as *const u8, b_len as usize);

src/ffi_util.rs

@@ -14,7 +14,7 @@
 //
 
 use libc::{self, c_char, c_void};
-use std::ffi::{CStr};
+use std::ffi::CStr;
 use std::str;
 
 pub fn error_message(ptr: *const c_char) -> String {

src/lib.rs

@@ -24,7 +24,8 @@ pub mod merge_operator;
 mod rocksdb;
 mod rocksdb_options;
 
-pub use rocksdb::{DB, DBCompressionType, DBCompactionStyle, DBRecoveryMode, DBIterator, DBVector, Direction, Error, IteratorMode, Writable, WriteBatch, Snapshot, new_bloom_filter};
+pub use rocksdb::{DB, DBCompactionStyle, DBCompressionType, DBIterator, DBRecoveryMode, DBVector,
+                  Direction, Error, IteratorMode, Snapshot, Writable, WriteBatch, new_bloom_filter};
 pub use merge_operator::MergeOperands;
 
 pub struct BlockBasedOptions {

src/merge_operator.rs

@@ -36,7 +36,17 @@ pub unsafe extern "C" fn name_callback(raw_cb: *mut c_void) -> *const c_char {
     cb.name.as_ptr()
 }
 
-pub unsafe extern "C" fn full_merge_callback(raw_cb: *mut c_void, raw_key: *const c_char, key_len: size_t, existing_value: *const c_char, existing_value_len: size_t, operands_list: *const *const c_char, operands_list_len: *const size_t, num_operands: c_int, success: *mut u8, new_value_length: *mut size_t) -> *mut c_char {
+pub unsafe extern "C" fn full_merge_callback(raw_cb: *mut c_void,
+                                             raw_key: *const c_char,
+                                             key_len: size_t,
+                                             existing_value: *const c_char,
+                                             existing_value_len: size_t,
+                                             operands_list: *const *const c_char,
+                                             operands_list_len: *const size_t,
+                                             num_operands: c_int,
+                                             success: *mut u8,
+                                             new_value_length: *mut size_t)
+                                             -> *mut c_char {
     let cb = &mut *(raw_cb as *mut MergeOperatorCallback);
     let operands = &mut MergeOperands::new(operands_list, operands_list_len, num_operands);
     let key = slice::from_raw_parts(raw_key as *const u8, key_len as usize);
@@ -52,7 +62,15 @@ pub unsafe extern "C" fn full_merge_callback(raw_cb: *mut c_void, raw_key: *cons
     buf as *mut c_char
 }
 
-pub unsafe extern "C" fn partial_merge_callback(raw_cb: *mut c_void, raw_key: *const c_char, key_len: size_t, operands_list: *const *const c_char, operands_list_len: *const size_t, num_operands: c_int, success: *mut u8, new_value_length: *mut size_t) -> *mut c_char {
+pub unsafe extern "C" fn partial_merge_callback(raw_cb: *mut c_void,
+                                                raw_key: *const c_char,
+                                                key_len: size_t,
+                                                operands_list: *const *const c_char,
+                                                operands_list_len: *const size_t,
+                                                num_operands: c_int,
+                                                success: *mut u8,
+                                                new_value_length: *mut size_t)
+                                                -> *mut c_char {
     let cb = &mut *(raw_cb as *mut MergeOperatorCallback);
     let operands = &mut MergeOperands::new(operands_list, operands_list_len, num_operands);
     let key = slice::from_raw_parts(raw_key as *const u8, key_len as usize);
@@ -76,7 +94,10 @@ pub struct MergeOperands {
 }
 
 impl MergeOperands {
-    fn new(operands_list: *const *const c_char, operands_list_len: *const size_t, num_operands: c_int) -> MergeOperands {
+    fn new(operands_list: *const *const c_char,
+           operands_list_len: *const size_t,
+           num_operands: c_int)
+           -> MergeOperands {
         assert!(num_operands >= 0);
         MergeOperands {
             operands_list: operands_list,
@@ -103,7 +124,8 @@ impl<'a> Iterator for &'a mut MergeOperands {
                 let len = *len_ptr as usize;
                 let ptr = base + (spacing * self.cursor);
                 self.cursor += 1;
-                Some(mem::transmute(slice::from_raw_parts(*(ptr as *const *const u8) as *const u8, len)))
+                Some(mem::transmute(slice::from_raw_parts(*(ptr as *const *const u8) as *const u8,
+                                                          len)))
             }
         }
     }
@@ -116,7 +138,10 @@ impl<'a> Iterator for &'a mut MergeOperands {
 
 #[cfg(test)]
 #[allow(unused_variables)]
-fn test_provided_merge(new_key: &[u8], existing_val: Option<&[u8]>, operands: &mut MergeOperands) -> Vec<u8> {
+fn test_provided_merge(new_key: &[u8],
+                       existing_val: Option<&[u8]>,
+                       operands: &mut MergeOperands)
+                       -> Vec<u8> {
     let nops = operands.size_hint().0;
     let mut result: Vec<u8> = Vec::with_capacity(nops);
     if let Some(v) = existing_val {
@@ -134,7 +159,7 @@ fn test_provided_merge(new_key: &[u8], existing_val: Option<&[u8]>, operands: &m
 
 #[test]
 fn mergetest() {
-    use {Options};
+    use Options;
     use rocksdb::{DB, Writable};
 
     let path = "_rust_rocksdb_mergetest";

src/rocksdb.rs

@@ -14,7 +14,7 @@
 //
 
 use std::collections::BTreeMap;
-use std::ffi::{CString};
+use std::ffi::CString;
 use std::fmt;
 use std::fs;
 use std::ops::Deref;
@@ -23,7 +23,7 @@ use std::ptr;
 use std::slice;
 use std::str;
 
-use libc::{self, c_char, c_uchar, c_int, c_void, size_t};
+use libc::{self, c_char, c_int, c_uchar, c_void, size_t};
 
 use {Options, WriteOptions};
 use ffi;
@@ -42,8 +42,8 @@ pub struct DB {
     path: PathBuf,
 }
 
-unsafe impl Send for DB { }
-unsafe impl Sync for DB { }
+unsafe impl Send for DB {}
+unsafe impl Sync for DB {}
 
 #[derive(Debug, Copy, Clone, PartialEq)]
 pub enum DBCompressionType {
@@ -141,9 +141,11 @@ impl Iterator for DBIterator {
             let key_len_ptr: *mut size_t = &mut key_len;
             let mut val_len: size_t = 0;
             let val_len_ptr: *mut size_t = &mut val_len;
-            let key_ptr = unsafe { ffi::rocksdb_iter_key(native_iter, key_len_ptr) as *const c_uchar };
+            let key_ptr =
+                unsafe { ffi::rocksdb_iter_key(native_iter, key_len_ptr) as *const c_uchar };
             let key = unsafe { slice::from_raw_parts(key_ptr, key_len as usize) };
-            let val_ptr = unsafe { ffi::rocksdb_iter_value(native_iter, val_len_ptr) as *const c_uchar };
+            let val_ptr =
+                unsafe { ffi::rocksdb_iter_value(native_iter, val_len_ptr) as *const c_uchar };
             let val = unsafe { slice::from_raw_parts(val_ptr, val_len as usize) };
 
             Some((key.to_vec().into_boxed_slice(), val.to_vec().into_boxed_slice()))
@@ -186,7 +188,9 @@ impl DBIterator {
                     self.direction = Direction::Reverse;
                 }
                 IteratorMode::From(key, dir) => {
-                    ffi::rocksdb_iter_seek(self.inner, key.as_ptr() as *const c_char, key.len() as size_t);
+                    ffi::rocksdb_iter_seek(self.inner,
+                                           key.as_ptr() as *const c_char,
+                                           key.len() as size_t);
                     self.direction = dir;
                 }
             };
@@ -198,7 +202,11 @@ impl DBIterator {
         unsafe { ffi::rocksdb_iter_valid(self.inner) != 0 }
     }
 
-    fn new_cf(db: &DB, cf_handle: *mut ffi::rocksdb_column_family_handle_t, readopts: &ReadOptions, mode: IteratorMode) -> Result<DBIterator, Error> {
+    fn new_cf(db: &DB,
+              cf_handle: *mut ffi::rocksdb_column_family_handle_t,
+              readopts: &ReadOptions,
+              mode: IteratorMode)
+              -> Result<DBIterator, Error> {
         unsafe {
             let iterator = ffi::rocksdb_create_iterator_cf(db.inner, readopts.inner, cf_handle);
 
@@ -236,7 +244,10 @@ impl<'a> Snapshot<'a> {
         DBIterator::new(self.db, &readopts, mode)
     }
 
-    pub fn iterator_cf(&self, cf_handle: *mut ffi::rocksdb_column_family_handle_t, mode: IteratorMode) -> Result<DBIterator, Error> {
+    pub fn iterator_cf(&self,
+                       cf_handle: *mut ffi::rocksdb_column_family_handle_t,
+                       mode: IteratorMode)
+                       -> Result<DBIterator, Error> {
         let mut readopts = ReadOptions::default();
         readopts.set_snapshot(self);
         DBIterator::new_cf(self.db, cf_handle, &readopts, mode)
@@ -248,7 +259,10 @@ impl<'a> Snapshot<'a> {
         self.db.get_opt(key, &readopts)
     }
 
-    pub fn get_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8]) -> Result<Option<DBVector>, Error> {
+    pub fn get_cf(&self,
+                  cf: *mut ffi::rocksdb_column_family_handle_t,
+                  key: &[u8])
+                  -> Result<Option<DBVector>, Error> {
         let mut readopts = ReadOptions::default();
         readopts.set_snapshot(self);
         self.db.get_cf_opt(cf, key, &readopts)
@@ -266,11 +280,22 @@ impl<'a> Drop for Snapshot<'a> {
 // This is for the DB and write batches to share the same API.
 pub trait Writable {
     fn put(&self, key: &[u8], value: &[u8]) -> Result<(), Error>;
-    fn put_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8]) -> Result<(), Error>;
+    fn put_cf(&self,
+              cf: *mut ffi::rocksdb_column_family_handle_t,
+              key: &[u8],
+              value: &[u8])
+              -> Result<(), Error>;
     fn merge(&self, key: &[u8], value: &[u8]) -> Result<(), Error>;
-    fn merge_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8]) -> Result<(), Error>;
+    fn merge_cf(&self,
+                cf: *mut ffi::rocksdb_column_family_handle_t,
+                key: &[u8],
+                value: &[u8])
+                -> Result<(), Error>;
     fn delete(&self, key: &[u8]) -> Result<(), Error>;
-    fn delete_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8]) -> Result<(), Error>;
+    fn delete_cf(&self,
+                 cf: *mut ffi::rocksdb_column_family_handle_t,
+                 key: &[u8])
+                 -> Result<(), Error>;
 }
 
 impl DB {
@@ -299,13 +324,17 @@ impl DB {
         let cpath = match CString::new(path.to_string_lossy().as_bytes()) {
             Ok(c) => c,
             Err(_) => {
-                return Err(Error::new("Failed to convert path to CString when opening rocksdb".to_owned()))
+                return Err(Error::new("Failed to convert path to CString \
+                                       when opening rocksdb"
+                    .to_owned()))
             }
         };
         let cpath_ptr = cpath.as_ptr();
 
         if let Err(e) = fs::create_dir_all(&path) {
-            return Err(Error::new(format!("Failed to create rocksdb directory: {:?}", e)));
+            return Err(Error::new(format!("Failed to create rocksdb \
+                                           directory: {:?}",
+                                          e)));
         }
 
         let db: *mut ffi::rocksdb_t;
@@ -322,8 +351,11 @@ impl DB {
                 cfs_v.push("default");
             }
 
-            // We need to store our CStrings in an intermediate vector so that their pointers remain valid.
-            let c_cfs: Vec<CString> = cfs_v.iter().map(|cf| CString::new(cf.as_bytes()).unwrap()).collect();
+            // We need to store our CStrings in an intermediate vector
+            // so that their pointers remain valid.
+            let c_cfs: Vec<CString> = cfs_v.iter()
+                .map(|cf| CString::new(cf.as_bytes()).unwrap())
+                .collect();
 
             let cfnames: Vec<_> = c_cfs.iter().map(|cf| cf.as_ptr()).collect();
 
@@ -331,15 +363,24 @@ impl DB {
             let mut cfhandles: Vec<_> = cfs_v.iter().map(|_| ptr::null_mut()).collect();
 
             // TODO(tyler) allow options to be passed in.
-            let cfopts: Vec<_> = cfs_v.iter().map(|_| unsafe { ffi::rocksdb_options_create() as *const _ }).collect();
+            let cfopts: Vec<_> = cfs_v.iter()
+                .map(|_| unsafe { ffi::rocksdb_options_create() as *const _ })
+                .collect();
 
             unsafe {
-                db = ffi_try!(ffi::rocksdb_open_column_families(opts.inner, cpath_ptr as *const _, cfs_v.len() as c_int, cfnames.as_ptr() as *const _, cfopts.as_ptr(), cfhandles.as_mut_ptr()));
+                db = ffi_try!(ffi::rocksdb_open_column_families(opts.inner,
+                                                                cpath_ptr as *const _,
+                                                                cfs_v.len() as c_int,
+                                                                cfnames.as_ptr() as *const _,
+                                                                cfopts.as_ptr(),
+                                                                cfhandles.as_mut_ptr()));
             }
 
             for handle in &cfhandles {
                 if handle.is_null() {
-                    return Err(Error::new("Received null column family handle from DB.".to_owned()));
+                    return Err(Error::new("Received null column family \
+                                           handle from DB."
+                        .to_owned()));
                 }
             }
 
@@ -398,12 +439,21 @@ impl DB {
 
     pub fn get_opt(&self, key: &[u8], readopts: &ReadOptions) -> Result<Option<DBVector>, Error> {
         if readopts.inner.is_null() {
-            return Err(Error::new("Unable to create rocksdb read options. This is a fairly trivial call, and its failure may be indicative of a mis-compiled or mis-loaded rocksdb library.".to_owned()));
+            return Err(Error::new("Unable to create rocksdb read options. \
+                                   This is a fairly trivial call, and its \
+                                   failure may be indicative of a \
+                                   mis-compiled or mis-loaded rocksdb \
+                                   library."
+                .to_owned()));
         }
 
         unsafe {
             let mut val_len: size_t = 0;
-            let val = ffi_try!(ffi::rocksdb_get(self.inner, readopts.inner, key.as_ptr() as *const c_char, key.len() as size_t, &mut val_len)) as *mut u8;
+            let val = ffi_try!(ffi::rocksdb_get(self.inner,
+                                                readopts.inner,
+                                                key.as_ptr() as *const c_char,
+                                                key.len() as size_t,
+                                                &mut val_len)) as *mut u8;
             if val.is_null() {
                 Ok(None)
             } else {
@@ -417,14 +467,28 @@ impl DB {
         self.get_opt(key, &ReadOptions::default())
     }
 
-    pub fn get_cf_opt(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], readopts: &ReadOptions) -> Result<Option<DBVector>, Error> {
+    pub fn get_cf_opt(&self,
+                      cf: *mut ffi::rocksdb_column_family_handle_t,
+                      key: &[u8],
+                      readopts: &ReadOptions)
+                      -> Result<Option<DBVector>, Error> {
         if readopts.inner.is_null() {
-            return Err(Error::new("Unable to create rocksdb read options. This is a fairly trivial call, and its failure may be indicative of a mis-compiled or mis-loaded rocksdb library.".to_owned()));
+            return Err(Error::new("Unable to create rocksdb read options. \
+                                   This is a fairly trivial call, and its \
+                                   failure may be indicative of a \
+                                   mis-compiled or mis-loaded rocksdb \
+                                   library."
+                .to_owned()));
         }
 
         unsafe {
             let mut val_len: size_t = 0;
-            let val = ffi_try!(ffi::rocksdb_get_cf(self.inner, readopts.inner, cf, key.as_ptr() as *const c_char, key.len() as size_t, &mut val_len)) as *mut u8;
+            let val = ffi_try!(ffi::rocksdb_get_cf(self.inner,
+                                                   readopts.inner,
+                                                   cf,
+                                                   key.as_ptr() as *const c_char,
+                                                   key.len() as size_t,
+                                                   &mut val_len)) as *mut u8;
             if val.is_null() {
                 Ok(None)
             } else {
@@ -433,19 +497,28 @@ impl DB {
         }
     }
 
-    pub fn get_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8]) -> Result<Option<DBVector>, Error> {
+    pub fn get_cf(&self,
+                  cf: *mut ffi::rocksdb_column_family_handle_t,
+                  key: &[u8])
+                  -> Result<Option<DBVector>, Error> {
         self.get_cf_opt(cf, key, &ReadOptions::default())
     }
 
-    pub fn create_cf(&mut self, name: &str, opts: &Options) -> Result<*mut ffi::rocksdb_column_family_handle_t, Error> {
+    pub fn create_cf(&mut self,
+                     name: &str,
+                     opts: &Options)
+                     -> Result<*mut ffi::rocksdb_column_family_handle_t, Error> {
         let cname = match CString::new(name.as_bytes()) {
             Ok(c) => c,
             Err(_) => {
-                return Err(Error::new("Failed to convert path to CString when opening rocksdb".to_owned()))
+                return Err(Error::new("Failed to convert path to CString \
+                                       when opening rocksdb"
+                    .to_owned()))
             }
         };
         let cf_handler = unsafe {
-            let cf_handler = ffi_try!(ffi::rocksdb_create_column_family(self.inner, opts.inner, cname.as_ptr()));
+            let cf_handler =
+                ffi_try!(ffi::rocksdb_create_column_family(self.inner, opts.inner, cname.as_ptr()));
             self.cfs.insert(name.to_string(), cf_handler);
             cf_handler
         };
@@ -473,7 +546,10 @@ impl DB {
         DBIterator::new(self, &opts, mode)
     }
 
-    pub fn iterator_cf(&self, cf_handle: *mut ffi::rocksdb_column_family_handle_t, mode: IteratorMode) -> Result<DBIterator, Error> {
+    pub fn iterator_cf(&self,
+                       cf_handle: *mut ffi::rocksdb_column_family_handle_t,
+                       mode: IteratorMode)
+                       -> Result<DBIterator, Error> {
         let opts = ReadOptions::default();
         DBIterator::new_cf(self, cf_handle, &opts, mode)
     }
@@ -484,42 +560,89 @@ impl DB {
 
     pub fn put_opt(&self, key: &[u8], value: &[u8], writeopts: &WriteOptions) -> Result<(), Error> {
         unsafe {
-            ffi_try!(ffi::rocksdb_put(self.inner, writeopts.inner, key.as_ptr() as *const c_char, key.len() as size_t, value.as_ptr() as *const c_char, value.len() as size_t));
+            ffi_try!(ffi::rocksdb_put(self.inner,
+                                      writeopts.inner,
+                                      key.as_ptr() as *const c_char,
+                                      key.len() as size_t,
+                                      value.as_ptr() as *const c_char,
+                                      value.len() as size_t));
             Ok(())
         }
     }
 
-    pub fn put_cf_opt(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8], writeopts: &WriteOptions) -> Result<(), Error> {
+    pub fn put_cf_opt(&self,
+                      cf: *mut ffi::rocksdb_column_family_handle_t,
+                      key: &[u8],
+                      value: &[u8],
+                      writeopts: &WriteOptions)
+                      -> Result<(), Error> {
         unsafe {
-            ffi_try!(ffi::rocksdb_put_cf(self.inner, writeopts.inner, cf, key.as_ptr() as *const c_char, key.len() as size_t, value.as_ptr() as *const c_char, value.len() as size_t));
+            ffi_try!(ffi::rocksdb_put_cf(self.inner,
+                                         writeopts.inner,
+                                         cf,
+                                         key.as_ptr() as *const c_char,
+                                         key.len() as size_t,
+                                         value.as_ptr() as *const c_char,
+                                         value.len() as size_t));
             Ok(())
         }
     }
 
-    pub fn merge_opt(&self, key: &[u8], value: &[u8], writeopts: &WriteOptions) -> Result<(), Error> {
+    pub fn merge_opt(&self,
+                     key: &[u8],
+                     value: &[u8],
+                     writeopts: &WriteOptions)
+                     -> Result<(), Error> {
         unsafe {
-            ffi_try!(ffi::rocksdb_merge(self.inner, writeopts.inner, key.as_ptr() as *const c_char, key.len() as size_t, value.as_ptr() as *const c_char, value.len() as size_t));
+            ffi_try!(ffi::rocksdb_merge(self.inner,
+                                        writeopts.inner,
+                                        key.as_ptr() as *const c_char,
+                                        key.len() as size_t,
+                                        value.as_ptr() as *const c_char,
+                                        value.len() as size_t));
             Ok(())
         }
     }
 
-    fn merge_cf_opt(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8], writeopts: &WriteOptions) -> Result<(), Error> {
+    fn merge_cf_opt(&self,
+                    cf: *mut ffi::rocksdb_column_family_handle_t,
+                    key: &[u8],
+                    value: &[u8],
+                    writeopts: &WriteOptions)
+                    -> Result<(), Error> {
         unsafe {
-            ffi_try!(ffi::rocksdb_merge_cf(self.inner, writeopts.inner, cf, key.as_ptr() as *const i8, key.len() as size_t, value.as_ptr() as *const i8, value.len() as size_t));
+            ffi_try!(ffi::rocksdb_merge_cf(self.inner,
+                                           writeopts.inner,
+                                           cf,
+                                           key.as_ptr() as *const i8,
+                                           key.len() as size_t,
+                                           value.as_ptr() as *const i8,
+                                           value.len() as size_t));
             Ok(())
         }
     }
 
     fn delete_opt(&self, key: &[u8], writeopts: &WriteOptions) -> Result<(), Error> {
         unsafe {
-            ffi_try!(ffi::rocksdb_delete(self.inner, writeopts.inner, key.as_ptr() as *const c_char, key.len() as size_t));
+            ffi_try!(ffi::rocksdb_delete(self.inner,
+                                         writeopts.inner,
+                                         key.as_ptr() as *const c_char,
+                                         key.len() as size_t));
             Ok(())
         }
     }
 
-    fn delete_cf_opt(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], writeopts: &WriteOptions) -> Result<(), Error> {
+    fn delete_cf_opt(&self,
+                     cf: *mut ffi::rocksdb_column_family_handle_t,
+                     key: &[u8],
+                     writeopts: &WriteOptions)
+                     -> Result<(), Error> {
         unsafe {
-            ffi_try!(ffi::rocksdb_delete_cf(self.inner, writeopts.inner, cf, key.as_ptr() as *const c_char, key.len() as size_t));
+            ffi_try!(ffi::rocksdb_delete_cf(self.inner,
+                                            writeopts.inner,
+                                            cf,
+                                            key.as_ptr() as *const c_char,
+                                            key.len() as size_t));
             Ok(())
         }
     }
@@ -530,7 +653,11 @@ impl Writable for DB {
         self.put_opt(key, value, &WriteOptions::default())
     }
 
-    fn put_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8]) -> Result<(), Error> {
+    fn put_cf(&self,
+              cf: *mut ffi::rocksdb_column_family_handle_t,
+              key: &[u8],
+              value: &[u8])
+              -> Result<(), Error> {
         self.put_cf_opt(cf, key, value, &WriteOptions::default())
     }
 
@@ -538,7 +665,11 @@ impl Writable for DB {
         self.merge_opt(key, value, &WriteOptions::default())
     }
 
-    fn merge_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8]) -> Result<(), Error> {
+    fn merge_cf(&self,
+                cf: *mut ffi::rocksdb_column_family_handle_t,
+                key: &[u8],
+                value: &[u8])
+                -> Result<(), Error> {
         self.merge_cf_opt(cf, key, value, &WriteOptions::default())
     }
 
@@ -546,7 +677,10 @@ impl Writable for DB {
         self.delete_opt(key, &WriteOptions::default())
     }
 
-    fn delete_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8]) -> Result<(), Error> {
+    fn delete_cf(&self,
+                 cf: *mut ffi::rocksdb_column_family_handle_t,
+                 key: &[u8])
+                 -> Result<(), Error> {
         self.delete_cf_opt(cf, key, &WriteOptions::default())
     }
 }
@@ -563,9 +697,7 @@ impl WriteBatch {
 
 impl Default for WriteBatch {
     fn default() -> WriteBatch {
-        WriteBatch {
-            inner: unsafe { ffi::rocksdb_writebatch_create() },
-        }
+        WriteBatch { inner: unsafe { ffi::rocksdb_writebatch_create() } }
     }
 }
 
@@ -596,28 +728,54 @@ impl Writable for WriteBatch {
     /// Insert a value into the database under the given key.
     fn put(&self, key: &[u8], value: &[u8]) -> Result<(), Error> {
         unsafe {
-            ffi::rocksdb_writebatch_put(self.inner, key.as_ptr() as *const i8, key.len() as size_t, value.as_ptr() as *const i8, value.len() as size_t);
+            ffi::rocksdb_writebatch_put(self.inner,
+                                        key.as_ptr() as *const i8,
+                                        key.len() as size_t,
+                                        value.as_ptr() as *const i8,
+                                        value.len() as size_t);
             Ok(())
         }
     }
 
-    fn put_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8]) -> Result<(), Error> {
+    fn put_cf(&self,
+              cf: *mut ffi::rocksdb_column_family_handle_t,
+              key: &[u8],
+              value: &[u8])
+              -> Result<(), Error> {
         unsafe {
-            ffi::rocksdb_writebatch_put_cf(self.inner, cf, key.as_ptr() as *const i8, key.len() as size_t, value.as_ptr() as *const i8, value.len() as size_t);
+            ffi::rocksdb_writebatch_put_cf(self.inner,
+                                           cf,
+                                           key.as_ptr() as *const i8,
+                                           key.len() as size_t,
+                                           value.as_ptr() as *const i8,
+                                           value.len() as size_t);
             Ok(())
         }
     }
 
     fn merge(&self, key: &[u8], value: &[u8]) -> Result<(), Error> {
         unsafe {
-            ffi::rocksdb_writebatch_merge(self.inner, key.as_ptr() as *const i8, key.len() as size_t, value.as_ptr() as *const i8, value.len() as size_t);
+            ffi::rocksdb_writebatch_merge(self.inner,
+                                          key.as_ptr() as *const i8,
+                                          key.len() as size_t,
+                                          value.as_ptr() as *const i8,
+                                          value.len() as size_t);
             Ok(())
         }
     }
 
-    fn merge_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8]) -> Result<(), Error> {
+    fn merge_cf(&self,
+                cf: *mut ffi::rocksdb_column_family_handle_t,
+                key: &[u8],
+                value: &[u8])
+                -> Result<(), Error> {
         unsafe {
-            ffi::rocksdb_writebatch_merge_cf(self.inner, cf, key.as_ptr() as *const i8, key.len() as size_t, value.as_ptr() as *const i8, value.len() as size_t);
+            ffi::rocksdb_writebatch_merge_cf(self.inner,
+                                             cf,
+                                             key.as_ptr() as *const i8,
+                                             key.len() as size_t,
+                                             value.as_ptr() as *const i8,
+                                             value.len() as size_t);
             Ok(())
         }
     }
@@ -627,14 +785,22 @@ impl Writable for WriteBatch {
     /// Returns Err if the key was not found
     fn delete(&self, key: &[u8]) -> Result<(), Error> {
         unsafe {
-            ffi::rocksdb_writebatch_delete(self.inner, key.as_ptr() as *const i8, key.len() as size_t);
+            ffi::rocksdb_writebatch_delete(self.inner,
+                                           key.as_ptr() as *const i8,
+                                           key.len() as size_t);
             Ok(())
         }
     }
 
-    fn delete_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8]) -> Result<(), Error> {
+    fn delete_cf(&self,
+                 cf: *mut ffi::rocksdb_column_family_handle_t,
+                 key: &[u8])
+                 -> Result<(), Error> {
         unsafe {
-            ffi::rocksdb_writebatch_delete_cf(self.inner, cf, key.as_ptr() as *const i8, key.len() as size_t);
+            ffi::rocksdb_writebatch_delete_cf(self.inner,
+                                              cf,
+                                              key.as_ptr() as *const i8,
+                                              key.len() as size_t);
             Ok(())
         }
     }
@@ -665,16 +831,16 @@ impl ReadOptions {
 
     pub fn set_iterate_upper_bound(&mut self, key: &[u8]) {
         unsafe {
-            ffi::rocksdb_readoptions_set_iterate_upper_bound(self.inner, key.as_ptr() as *const i8, key.len() as size_t);
+            ffi::rocksdb_readoptions_set_iterate_upper_bound(self.inner,
+                                                             key.as_ptr() as *const i8,
+                                                             key.len() as size_t);
         }
     }
 }
 
 impl Default for ReadOptions {
     fn default() -> ReadOptions {
-        unsafe {
-            ReadOptions { inner: ffi::rocksdb_readoptions_create() }
-        }
+        unsafe { ReadOptions { inner: ffi::rocksdb_readoptions_create() } }
     }
 }
 
@@ -738,7 +904,10 @@ fn errors_do_stuff() {
     // The DB will still be open when we try to destroy it and the lock should fail.
     match DB::destroy(&opts, path) {
         Err(s) => {
-            assert!(s == Error::new("IO error: lock _rust_rocksdb_error/LOCK: No locks available".to_owned()))
+            assert!(s ==
+                    Error::new("IO error: lock _rust_rocksdb_error/LOCK: No \
+                                locks available"
+                .to_owned()))
         }
         Ok(_) => panic!("should fail"),
     }
@@ -792,7 +961,9 @@ fn iterator_test() {
         assert!(p.is_ok());
         let iter = db.iterator(IteratorMode::Start);
         for (k, v) in iter {
-            println!("Hello {}: {}", str::from_utf8(&*k).unwrap(), str::from_utf8(&*v).unwrap());
+            println!("Hello {}: {}",
+                     str::from_utf8(&*k).unwrap(),
+                     str::from_utf8(&*v).unwrap());
         }
     }
     let opts = Options::default();

src/rocksdb_options.rs

@@ -16,13 +16,14 @@
 use std::ffi::{CStr, CString};
 use std::mem;
 
-use libc::{self, c_int, c_uint, c_uchar, c_void, size_t, uint64_t};
+use libc::{self, c_int, c_uchar, c_uint, c_void, size_t, uint64_t};
 
-use {Options, WriteOptions, BlockBasedOptions};
+use {BlockBasedOptions, Options, WriteOptions};
 use comparator::{self, ComparatorCallback};
 use ffi;
-use merge_operator::{self, MergeFn, MergeOperatorCallback, full_merge_callback, partial_merge_callback};
-use rocksdb::{DBCompressionType, DBCompactionStyle, DBRecoveryMode, new_cache};
+use merge_operator::{self, MergeFn, MergeOperatorCallback, full_merge_callback,
+                     partial_merge_callback};
+use rocksdb::{DBCompactionStyle, DBCompressionType, DBRecoveryMode, new_cache};
 
 impl Drop for Options {
     fn drop(&mut self) {
@@ -58,7 +59,8 @@ impl BlockBasedOptions {
     pub fn set_lru_cache(&mut self, size: size_t) {
         let cache = new_cache(size);
         unsafe {
-            // Since cache is wrapped in shared_ptr, we don't need to call rocksdb_cache_destroy explicitly.
+            // Since cache is wrapped in shared_ptr, we don't need to
+            // call rocksdb_cache_destroy explicitly.
             ffi::rocksdb_block_based_options_set_block_cache(self.inner, cache);
         }
     }
@@ -84,9 +86,7 @@ impl BlockBasedOptions {
 
 impl Default for BlockBasedOptions {
     fn default() -> BlockBasedOptions {
-        let block_opts = unsafe {
-            ffi::rocksdb_block_based_options_create()
-        };
+        let block_opts = unsafe { ffi::rocksdb_block_based_options_create() };
         if block_opts.is_null() {
             panic!("Could not create rocksdb block based options".to_owned());
         }
@@ -117,7 +117,9 @@ impl Options {
 
     pub fn optimize_level_style_compaction(&mut self, memtable_memory_budget: usize) {
         unsafe {
-            ffi::rocksdb_options_optimize_level_style_compaction(self.inner, memtable_memory_budget as uint64_t);
+            ffi::rocksdb_options_optimize_level_style_compaction(
+                self.inner,
+                memtable_memory_budget as uint64_t);
         }
     }
 
@@ -184,7 +186,9 @@ impl Options {
     pub fn compression_per_level(&mut self, level_types: &[DBCompressionType]) {
         unsafe {
             let level_types: Vec<_> = level_types.iter().map(|&t| t as c_int).collect();
-            ffi::rocksdb_options_set_compression_per_level(self.inner, level_types.as_ptr(), level_types.len() as size_t)
+            ffi::rocksdb_options_set_compression_per_level(self.inner,
+                                                           level_types.as_ptr(),
+                                                           level_types.len() as size_t)
         }
     }
 
@@ -195,7 +199,12 @@ impl Options {
         });
 
         unsafe {
-            let mo = ffi::rocksdb_mergeoperator_create(mem::transmute(cb), Some(merge_operator::destructor_callback), Some(full_merge_callback), Some(partial_merge_callback), None, Some(merge_operator::name_callback));
+            let mo = ffi::rocksdb_mergeoperator_create(mem::transmute(cb),
+                                                       Some(merge_operator::destructor_callback),
+                                                       Some(full_merge_callback),
+                                                       Some(partial_merge_callback),
+                                                       None,
+                                                       Some(merge_operator::name_callback));
             ffi::rocksdb_options_set_merge_operator(self.inner, mo);
         }
     }
@@ -208,7 +217,9 @@ impl Options {
     /// Sets the comparator used to define the order of keys in the table.
     /// Default: a comparator that uses lexicographic byte-wise ordering
     ///
-    /// The client must ensure that the comparator supplied here has the same name and orders keys *exactly* the same as the comparator provided to previous open calls on the same DB.
+    /// The client must ensure that the comparator supplied here has the same
+    /// name and orders keys *exactly* the same as the comparator provided to
+    /// previous open calls on the same DB.
     pub fn set_comparator(&mut self, name: &str, compare_fn: fn(&[u8], &[u8]) -> i32) {
         let cb = Box::new(ComparatorCallback {
             name: CString::new(name.as_bytes()).unwrap(),
@@ -216,7 +227,10 @@ impl Options {
         });
 
         unsafe {
-            let cmp = ffi::rocksdb_comparator_create(mem::transmute(cb), Some(comparator::destructor_callback), Some(comparator::compare_callback), Some(comparator::name_callback));
+            let cmp = ffi::rocksdb_comparator_create(mem::transmute(cb),
+                                                     Some(comparator::destructor_callback),
+                                                     Some(comparator::compare_callback),
+                                                     Some(comparator::name_callback));
             ffi::rocksdb_options_set_comparator(self.inner, cmp);
         }
     }
@@ -270,9 +284,7 @@ impl Options {
     /// opts.set_use_fsync(true);
     /// ```
     pub fn set_use_fsync(&mut self, useit: bool) {
-        unsafe {
-            ffi::rocksdb_options_set_use_fsync(self.inner, useit as c_int)
-        }
+        unsafe { ffi::rocksdb_options_set_use_fsync(self.inner, useit as c_int) }
     }
 
     /// Allows OS to incrementally sync files to disk while they are being
@@ -304,9 +316,7 @@ impl Options {
     }
 
     pub fn set_disable_data_sync(&mut self, disable: bool) {
-        unsafe {
-            ffi::rocksdb_options_set_disable_data_sync(self.inner, disable as c_int)
-        }
+        unsafe { ffi::rocksdb_options_set_disable_data_sync(self.inner, disable as c_int) }
     }
 
     /// Hints to the OS that it should not buffer disk I/O. Enabling this
@@ -722,9 +732,7 @@ impl Options {
     /// opts.set_disable_auto_compactions(true);
     /// ```
     pub fn set_disable_auto_compactions(&mut self, disable: bool) {
-        unsafe {
-            ffi::rocksdb_options_set_disable_auto_compactions(self.inner, disable as c_int)
-        }
+        unsafe { ffi::rocksdb_options_set_disable_auto_compactions(self.inner, disable as c_int) }
     }
 
     pub fn set_block_based_table_factory(&mut self, factory: &BlockBasedOptions) {

test/test_column_family.rs

@@ -45,8 +45,9 @@ pub fn test_column_family() {
             families")
             }
             Err(e) => {
-                assert!(e.to_string().starts_with("Invalid argument: You have to open \
-                                       all column families."))
+                assert!(e.to_string()
+                    .starts_with("Invalid argument: You have to open all \
+                                  column families."))
             }
         }
     }

test/test_iterator.rs

@@ -114,39 +114,48 @@ pub fn test_iterator() {
             assert_eq!(iterator1.collect::<Vec<_>>(), expected2);
         }
         {
-            let iterator1 = db.iterator(IteratorMode::From(b"k2",
-                                                           Direction::Forward));
+            let iterator1 =
+                db.iterator(IteratorMode::From(b"k2", Direction::Forward));
             let expected = vec![(cba(&k2), cba(&v2)),
                                 (cba(&k3), cba(&v3)),
                                 (cba(&k4), cba(&v4))];
             assert_eq!(iterator1.collect::<Vec<_>>(), expected);
         }
         {
-            let iterator1 = db.iterator(IteratorMode::From(b"k2",
-                                                           Direction::Reverse));
+            let iterator1 =
+                db.iterator(IteratorMode::From(b"k2", Direction::Reverse));
             let expected = vec![(cba(&k2), cba(&v2)), (cba(&k1), cba(&v1))];
             assert_eq!(iterator1.collect::<Vec<_>>(), expected);
         }
         {
-            let iterator1 = db.iterator(IteratorMode::From(b"k0", Direction::Forward));
+            let iterator1 =
+                db.iterator(IteratorMode::From(b"k0", Direction::Forward));
             assert!(iterator1.valid());
-            let iterator2 = db.iterator(IteratorMode::From(b"k1", Direction::Forward));
+            let iterator2 =
+                db.iterator(IteratorMode::From(b"k1", Direction::Forward));
             assert!(iterator2.valid());
-            let iterator3 = db.iterator(IteratorMode::From(b"k11", Direction::Forward));
+            let iterator3 =
+                db.iterator(IteratorMode::From(b"k11", Direction::Forward));
             assert!(iterator3.valid());
-            let iterator4 = db.iterator(IteratorMode::From(b"k5", Direction::Forward));
+            let iterator4 =
+                db.iterator(IteratorMode::From(b"k5", Direction::Forward));
             assert!(!iterator4.valid());
-            let iterator5 = db.iterator(IteratorMode::From(b"k0", Direction::Reverse));
+            let iterator5 =
+                db.iterator(IteratorMode::From(b"k0", Direction::Reverse));
             assert!(iterator5.valid());
-            let iterator6 = db.iterator(IteratorMode::From(b"k1", Direction::Reverse));
+            let iterator6 =
+                db.iterator(IteratorMode::From(b"k1", Direction::Reverse));
             assert!(iterator6.valid());
-            let iterator7 = db.iterator(IteratorMode::From(b"k11", Direction::Reverse));
+            let iterator7 =
+                db.iterator(IteratorMode::From(b"k11", Direction::Reverse));
             assert!(iterator7.valid());
-            let iterator8 = db.iterator(IteratorMode::From(b"k5", Direction::Reverse));
+            let iterator8 =
+                db.iterator(IteratorMode::From(b"k5", Direction::Reverse));
             assert!(!iterator8.valid());
         }
         {
-            let mut iterator1 = db.iterator(IteratorMode::From(b"k4", Direction::Forward));
+            let mut iterator1 =
+                db.iterator(IteratorMode::From(b"k4", Direction::Forward));
             iterator1.next();
             assert!(iterator1.valid());
             iterator1.next();

test/test_rocksdb_options.rs

@@ -17,10 +17,10 @@ use rocksdb::{DB, Options};
 
 #[test]
 fn test_set_num_levels() {
-	let path = "_rust_rocksdb_test_set_num_levels";
-	let mut opts = Options::default();
-	opts.create_if_missing(true);
-	opts.set_num_levels(2);
-	let db = DB::open(&opts, path).unwrap();
-	drop(db);
+    let path = "_rust_rocksdb_test_set_num_levels";
+    let mut opts = Options::default();
+    opts.create_if_missing(true);
+    opts.set_num_levels(2);
+    let db = DB::open(&opts, path).unwrap();
+    drop(db);
 }