Performed lots of clean-up on code.

Cargo.toml

@@ -1,7 +1,6 @@
 [package]
-
 name = "rocksdb"
-description = "A Rust wrapper for Facebook's RocksDB embeddable database."
+description = "Rust wrapper for Facebook's RocksDB embeddable database"
 version = "0.4.1"
 authors = ["Tyler Neely <t@jujit.su>", "David Greenberg <dsg123456789@gmail.com>"]
 license = "Apache-2.0"
@@ -19,7 +18,6 @@ default=[]
 valgrind = []
 
 [[test]]
-
 name = "test"
 path = "test/test.rs"
 

rocksdb-sys/Cargo.toml

@@ -18,5 +18,9 @@ static = []
 [dependencies]
 libc = "0.2"
 
+[dev-dependencies]
+const-cstr = "0.2"
+
 [build-dependencies]
 gcc = { version = "0.3", features = ["parallel"] }
+make-cmd = "0.1"

rocksdb-sys/build.rs

@@ -14,6 +14,9 @@ fn link(name: &str, bundled: bool) {
 }
 
 fn build_rocksdb() {
+    println!("cargo:rerun-if-changed=build.rs");
+    println!("cargo:rerun-if-changed=rocksdb/");
+
     let mut config = gcc::Config::new();
     config.include("rocksdb/include/");
     config.include("rocksdb/");

rocksdb-sys/src/ffi.rs

@@ -1,500 +0,0 @@
-// Copyright 2014 Tyler Neely
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-extern crate libc;
-use self::libc::{c_char, c_uchar, c_int, c_void, size_t};
-use std::ffi::CStr;
-use std::str::from_utf8;
-
-pub enum DBOptionsOpaque {}
-pub type DBOptions = *const DBOptionsOpaque;
-
-pub enum DBInstanceOpaque {}
-pub type DBInstance = *const DBInstanceOpaque;
-
-pub enum DBWriteOptionsOpaque {}
-pub type DBWriteOptions = *const DBWriteOptionsOpaque;
-
-pub enum DBReadOptionsOpaque {}
-pub type DBReadOptions = *const DBReadOptionsOpaque;
-
-pub enum DBMergeOperatorOpaque {}
-pub type DBMergeOperator = *const DBMergeOperatorOpaque;
-
-pub enum DBBlockBasedTableOptionsOpaque {}
-pub type DBBlockBasedTableOptions = *const DBBlockBasedTableOptionsOpaque;
-
-pub enum DBCacheOpaque {}
-pub type DBCache = *const DBCacheOpaque;
-
-pub enum DBFilterPolicyOpaque {}
-pub type DBFilterPolicy = *const DBFilterPolicyOpaque;
-
-pub enum DBSnapshotOpaque {}
-pub type DBSnapshot = *const DBSnapshotOpaque;
-
-pub enum DBIteratorOpaque {}
-pub type DBIterator = *const DBIteratorOpaque;
-
-pub enum DBCFHandleOpaque {}
-pub type DBCFHandle = *const DBCFHandleOpaque;
-
-pub enum DBWriteBatchOpaque {}
-pub type DBWriteBatch = *const DBWriteBatchOpaque;
-
-pub enum DBComparatorOpaque {}
-pub type DBComparator = *const DBComparatorOpaque;
-
-pub enum DBSliceTransformOpaque {}
-pub type DBSliceTransform = *const DBSliceTransformOpaque;
-
-pub const BLOCK_BASED_INDEX_TYPE_BINARY_SEARCH: c_int = 0;
-pub const BLOCK_BASED_INDEX_TYPE_HASH_SEARCH: c_int = 1;
-
-pub fn new_bloom_filter(bits: c_int) -> DBFilterPolicy {
-    unsafe { rocksdb_filterpolicy_create_bloom(bits) }
-}
-
-pub fn new_cache(capacity: size_t) -> DBCache {
-    unsafe { rocksdb_cache_create_lru(capacity) }
-}
-
-#[derive(Copy, Clone)]
-#[repr(C)]
-pub enum DBCompressionType {
-    None = 0,
-    Snappy = 1,
-    Zlib = 2,
-    Bz2 = 3,
-    Lz4 = 4,
-    Lz4hc = 5,
-}
-
-#[repr(C)]
-pub enum DBCompactionStyle {
-    Level = 0,
-    Universal = 1,
-    Fifo = 2,
-}
-
-#[repr(C)]
-pub enum DBUniversalCompactionStyle {
-    rocksdb_similar_size_compaction_stop_style = 0,
-    rocksdb_total_size_compaction_stop_style = 1,
-}
-
-#[derive(Copy, Clone, PartialEq)]
-#[repr(C)]
-pub enum DBRecoveryMode {
-    TolerateCorruptedTailRecords = 0,
-    AbsoluteConsistency = 1,
-    PointInTime = 2,
-    SkipAnyCorruptedRecords = 3,
-}
-
-pub fn error_message(ptr: *const i8) -> String {
-    let c_str = unsafe { CStr::from_ptr(ptr as *const _) };
-    let s = from_utf8(c_str.to_bytes()).unwrap().to_owned();
-    unsafe {
-        libc::free(ptr as *mut libc::c_void);
-    }
-    s
-}
-
-// TODO audit the use of boolean arguments, b/c I think they need to be u8
-// instead...
-#[link(name = "rocksdb")]
-extern "C" {
-    pub fn rocksdb_options_create() -> DBOptions;
-    pub fn rocksdb_options_destroy(opts: DBOptions);
-    pub fn rocksdb_cache_create_lru(capacity: size_t) -> DBCache;
-    pub fn rocksdb_cache_destroy(cache: DBCache);
-    pub fn rocksdb_block_based_options_create() -> DBBlockBasedTableOptions;
-    pub fn rocksdb_block_based_options_destroy(opts: DBBlockBasedTableOptions);
-    pub fn rocksdb_block_based_options_set_block_size(
-        block_options: DBBlockBasedTableOptions,
-        block_size: size_t);
-    pub fn rocksdb_block_based_options_set_block_size_deviation(
-        block_options: DBBlockBasedTableOptions,
-        block_size_deviation: c_int);
-    pub fn rocksdb_block_based_options_set_block_restart_interval(
-        block_options: DBBlockBasedTableOptions,
-        block_restart_interval: c_int);
-    pub fn rocksdb_block_based_options_set_cache_index_and_filter_blocks(
-        block_options: DBBlockBasedTableOptions, v: c_uchar);
-    pub fn rocksdb_block_based_options_set_filter_policy(
-        block_options: DBBlockBasedTableOptions,
-        filter_policy: DBFilterPolicy);
-    pub fn rocksdb_block_based_options_set_no_block_cache(
-        block_options: DBBlockBasedTableOptions, no_block_cache: bool);
-    pub fn rocksdb_block_based_options_set_block_cache(
-        block_options: DBBlockBasedTableOptions, block_cache: DBCache);
-    pub fn rocksdb_block_based_options_set_block_cache_compressed(
-        block_options: DBBlockBasedTableOptions,
-        block_cache_compressed: DBCache);
-    pub fn rocksdb_block_based_options_set_whole_key_filtering(
-        ck_options: DBBlockBasedTableOptions, doit: bool);
-    pub fn rocksdb_options_set_block_based_table_factory(
-        options: DBOptions,
-        block_options: DBBlockBasedTableOptions);
-    pub fn rocksdb_options_increase_parallelism(options: DBOptions,
-                                                threads: c_int);
-    pub fn rocksdb_options_optimize_level_style_compaction(
-        options: DBOptions, memtable_memory_budget: c_int);
-    pub fn rocksdb_options_set_create_if_missing(options: DBOptions, v: bool);
-    pub fn rocksdb_options_set_max_open_files(options: DBOptions,
-                                              files: c_int);
-    pub fn rocksdb_options_set_use_fsync(options: DBOptions, v: c_int);
-    pub fn rocksdb_options_set_bytes_per_sync(options: DBOptions, bytes: u64);
-    pub fn rocksdb_options_set_disable_data_sync(options: DBOptions,
-                                                 v: c_int);
-    pub fn rocksdb_options_set_allow_os_buffer(options: DBOptions, is_allow: bool);
-    pub fn rocksdb_options_optimize_for_point_lookup(options: DBOptions,
-                                                     block_cache_size_mb: u64);
-    pub fn rocksdb_options_set_table_cache_numshardbits(options: DBOptions,
-                                                        bits: c_int);
-    pub fn rocksdb_options_set_max_write_buffer_number(options: DBOptions,
-                                                       bufno: c_int);
-    pub fn rocksdb_options_set_min_write_buffer_number_to_merge(
-        options: DBOptions, bufno: c_int);
-    pub fn rocksdb_options_set_level0_file_num_compaction_trigger(
-        options: DBOptions, no: c_int);
-    pub fn rocksdb_options_set_level0_slowdown_writes_trigger(
-        options: DBOptions, no: c_int);
-    pub fn rocksdb_options_set_level0_stop_writes_trigger(options: DBOptions,
-                                                          no: c_int);
-    pub fn rocksdb_options_set_write_buffer_size(options: DBOptions,
-                                                 bytes: usize);
-    pub fn rocksdb_options_set_target_file_size_base(options: DBOptions,
-                                                     bytes: u64);
-    pub fn rocksdb_options_set_target_file_size_multiplier(options: DBOptions,
-                                                           mul: c_int);
-    pub fn rocksdb_options_set_max_bytes_for_level_base(options: DBOptions, bytes: u64);
-    pub fn rocksdb_options_set_max_bytes_for_level_multiplier(options: DBOptions, mul: c_int);
-    pub fn rocksdb_options_set_max_log_file_size(options: DBOptions,
-                                                 bytes: usize);
-    pub fn rocksdb_options_set_max_manifest_file_size(options: DBOptions,
-                                                      bytes: usize);
-    pub fn rocksdb_options_set_hash_skip_list_rep(options: DBOptions,
-                                                  bytes: usize,
-                                                  a1: i32,
-                                                  a2: i32);
-    pub fn rocksdb_options_set_compaction_style(options: DBOptions,
-                                                cs: DBCompactionStyle);
-    pub fn rocksdb_options_set_compression(options: DBOptions,
-                                           compression_style_no: DBCompressionType);
-    pub fn rocksdb_options_set_compression_per_level(options: DBOptions,
-                                            level_values: *const DBCompressionType,
-                                            num_levels: size_t);
-    pub fn rocksdb_options_set_max_background_compactions(
-        options: DBOptions, max_bg_compactions: c_int);
-    pub fn rocksdb_options_set_max_background_flushes(options: DBOptions,
-                                                      max_bg_flushes: c_int);
-    pub fn rocksdb_options_set_disable_auto_compactions(options: DBOptions,
-                                                        v: c_int);
-    pub fn rocksdb_options_set_report_bg_io_stats(options: DBOptions, v: c_int);
-    pub fn rocksdb_options_set_wal_recovery_mode(options: DBOptions, mode: DBRecoveryMode);
-    pub fn rocksdb_options_enable_statistics(options: DBOptions);
-    pub fn rocksdb_options_statistics_get_string(options: DBOptions) -> *const c_char;
-    pub fn rocksdb_options_set_stats_dump_period_sec(options: DBOptions, v: usize);
-    pub fn rocksdb_options_set_num_levels(options: DBOptions, v: c_int);
-    pub fn rocksdb_filterpolicy_create_bloom_full(bits_per_key: c_int)
-                                                -> DBFilterPolicy;
-    pub fn rocksdb_filterpolicy_create_bloom(bits_per_key: c_int)
-                                             -> DBFilterPolicy;
-    pub fn rocksdb_open(options: DBOptions,
-                        path: *const i8,
-                        err: *mut *const i8)
-                        -> DBInstance;
-    pub fn rocksdb_writeoptions_create() -> DBWriteOptions;
-    pub fn rocksdb_writeoptions_destroy(writeopts: DBWriteOptions);
-    pub fn rocksdb_writeoptions_set_sync(writeopts: DBWriteOptions, v: bool);
-    pub fn rocksdb_writeoptions_disable_WAL(writeopts: DBWriteOptions,
-                                            v: c_int);
-    pub fn rocksdb_put(db: DBInstance,
-                       writeopts: DBWriteOptions,
-                       k: *const u8,
-                       kLen: size_t,
-                       v: *const u8,
-                       vLen: size_t,
-                       err: *mut *const i8);
-    pub fn rocksdb_put_cf(db: DBInstance,
-                          writeopts: DBWriteOptions,
-                          cf: DBCFHandle,
-                          k: *const u8,
-                          kLen: size_t,
-                          v: *const u8,
-                          vLen: size_t,
-                          err: *mut *const i8);
-    pub fn rocksdb_readoptions_create() -> DBReadOptions;
-    pub fn rocksdb_readoptions_destroy(readopts: DBReadOptions);
-    pub fn rocksdb_readoptions_set_verify_checksums(readopts: DBReadOptions,
-                                                    v: bool);
-    pub fn rocksdb_readoptions_set_fill_cache(readopts: DBReadOptions,
-                                              v: bool);
-    pub fn rocksdb_readoptions_set_snapshot(readopts: DBReadOptions,
-                                            snapshot: DBSnapshot); //TODO how do I make this a const ref?
-    pub fn rocksdb_readoptions_set_iterate_upper_bound(readopts: DBReadOptions,
-                                                       k: *const u8,
-                                                       kLen: size_t);
-    pub fn rocksdb_readoptions_set_read_tier(readopts: DBReadOptions,
-                                             tier: c_int);
-    pub fn rocksdb_readoptions_set_tailing(readopts: DBReadOptions, v: bool);
-
-    pub fn rocksdb_get(db: DBInstance,
-                       readopts: DBReadOptions,
-                       k: *const u8,
-                       kLen: size_t,
-                       valLen: *const size_t,
-                       err: *mut *const i8)
-                       -> *mut c_void;
-    pub fn rocksdb_get_cf(db: DBInstance,
-                          readopts: DBReadOptions,
-                          cf_handle: DBCFHandle,
-                          k: *const u8,
-                          kLen: size_t,
-                          valLen: *const size_t,
-                          err: *mut *const i8)
-                          -> *mut c_void;
-    pub fn rocksdb_create_iterator(db: DBInstance,
-                                   readopts: DBReadOptions)
-                                   -> DBIterator;
-    pub fn rocksdb_create_iterator_cf(db: DBInstance,
-                                      readopts: DBReadOptions,
-                                      cf_handle: DBCFHandle)
-                                      -> DBIterator;
-    pub fn rocksdb_create_snapshot(db: DBInstance) -> DBSnapshot;
-    pub fn rocksdb_release_snapshot(db: DBInstance, snapshot: DBSnapshot);
-
-    pub fn rocksdb_delete(db: DBInstance,
-                          writeopts: DBWriteOptions,
-                          k: *const u8,
-                          kLen: size_t,
-                          err: *mut *const i8)
-                          -> *mut c_void;
-    pub fn rocksdb_delete_cf(db: DBInstance,
-                             writeopts: DBWriteOptions,
-                             cf: DBCFHandle,
-                             k: *const u8,
-                             kLen: size_t,
-                             err: *mut *const i8)
-                             -> *mut c_void;
-    pub fn rocksdb_close(db: DBInstance);
-    pub fn rocksdb_destroy_db(options: DBOptions,
-                              path: *const i8,
-                              err: *mut *const i8);
-    pub fn rocksdb_repair_db(options: DBOptions,
-                             path: *const i8,
-                             err: *mut *const i8);
-    // Merge
-    pub fn rocksdb_merge(db: DBInstance,
-                         writeopts: DBWriteOptions,
-                         k: *const u8,
-                         kLen: size_t,
-                         v: *const u8,
-                         vLen: size_t,
-                         err: *mut *const i8);
-    pub fn rocksdb_merge_cf(db: DBInstance,
-                            writeopts: DBWriteOptions,
-                            cf: DBCFHandle,
-                            k: *const u8,
-                            kLen: size_t,
-                            v: *const u8,
-                            vLen: size_t,
-                            err: *mut *const i8);
-    pub fn rocksdb_mergeoperator_create(
-        state: *mut c_void,
-        destroy: extern fn(*mut c_void) -> (),
-        full_merge: extern fn (arg: *mut c_void,
-                               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
-                               ) -> *const c_char,
-        partial_merge: extern fn(arg: *mut c_void,
-                                 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
-                                 ) -> *const c_char,
-        delete_value: Option<extern "C" fn(*mut c_void,
-                                           value: *const c_char,
-                                           value_len: *mut size_t
-                                           ) -> ()>,
-        name_fn: extern fn(*mut c_void) -> *const c_char,
-    ) -> DBMergeOperator;
-    pub fn rocksdb_mergeoperator_destroy(mo: DBMergeOperator);
-    pub fn rocksdb_options_set_merge_operator(options: DBOptions,
-                                              mo: DBMergeOperator);
-    // Iterator
-    pub fn rocksdb_iter_destroy(iter: DBIterator);
-    pub fn rocksdb_iter_valid(iter: DBIterator) -> bool;
-    pub fn rocksdb_iter_seek_to_first(iter: DBIterator);
-    pub fn rocksdb_iter_seek_to_last(iter: DBIterator);
-    pub fn rocksdb_iter_seek(iter: DBIterator, key: *const u8, klen: size_t);
-    pub fn rocksdb_iter_next(iter: DBIterator);
-    pub fn rocksdb_iter_prev(iter: DBIterator);
-    pub fn rocksdb_iter_key(iter: DBIterator, klen: *mut size_t) -> *mut u8;
-    pub fn rocksdb_iter_value(iter: DBIterator, vlen: *mut size_t) -> *mut u8;
-    pub fn rocksdb_iter_get_error(iter: DBIterator, err: *mut *const u8);
-    // Write batch
-    pub fn rocksdb_write(db: DBInstance,
-                         writeopts: DBWriteOptions,
-                         batch: DBWriteBatch,
-                         err: *mut *const i8);
-    pub fn rocksdb_writebatch_create() -> DBWriteBatch;
-    pub fn rocksdb_writebatch_create_from(rep: *const u8,
-                                          size: size_t)
-                                          -> DBWriteBatch;
-    pub fn rocksdb_writebatch_destroy(batch: DBWriteBatch);
-    pub fn rocksdb_writebatch_clear(batch: DBWriteBatch);
-    pub fn rocksdb_writebatch_count(batch: DBWriteBatch) -> c_int;
-    pub fn rocksdb_writebatch_put(batch: DBWriteBatch,
-                                  key: *const u8,
-                                  klen: size_t,
-                                  val: *const u8,
-                                  vlen: size_t);
-    pub fn rocksdb_writebatch_put_cf(batch: DBWriteBatch,
-                                     cf: DBCFHandle,
-                                     key: *const u8,
-                                     klen: size_t,
-                                     val: *const u8,
-                                     vlen: size_t);
-    pub fn rocksdb_writebatch_merge(batch: DBWriteBatch,
-                                    key: *const u8,
-                                    klen: size_t,
-                                    val: *const u8,
-                                    vlen: size_t);
-    pub fn rocksdb_writebatch_merge_cf(batch: DBWriteBatch,
-                                       cf: DBCFHandle,
-                                       key: *const u8,
-                                       klen: size_t,
-                                       val: *const u8,
-                                       vlen: size_t);
-    pub fn rocksdb_writebatch_delete(batch: DBWriteBatch,
-                                     key: *const u8,
-                                     klen: size_t);
-    pub fn rocksdb_writebatch_delete_cf(batch: DBWriteBatch,
-                                        cf: DBCFHandle,
-                                        key: *const u8,
-                                        klen: size_t);
-    pub fn rocksdb_writebatch_iterate(
-        batch: DBWriteBatch,
-        state: *mut c_void,
-        put_fn: extern fn(state: *mut c_void,
-                          k: *const u8, klen: size_t,
-                          v: *const u8, vlen: size_t),
-        deleted_fn: extern fn(state: *mut c_void,
-                              k: *const u8, klen: size_t));
-    pub fn rocksdb_writebatch_data(batch: DBWriteBatch,
-                                   size: *mut size_t)
-                                   -> *const u8;
-
-    // Comparator
-    pub fn rocksdb_options_set_comparator(options: DBOptions,
-                                          cb: DBComparator);
-    pub fn rocksdb_comparator_create(state: *mut c_void,
-                                     destroy: extern "C" fn(*mut c_void) -> (),
-                                     compare: extern "C" fn(arg: *mut c_void,
-                                                            a: *const c_char,
-                                                            alen: size_t,
-                                                            b: *const c_char,
-                                                            blen: size_t)
-                                                            -> c_int,
-                                     name_fn: extern "C" fn(*mut c_void)
-                                                            -> *const c_char)
-                                     -> DBComparator;
-    pub fn rocksdb_comparator_destroy(cmp: DBComparator);
-
-    // Column Family
-    pub fn rocksdb_open_column_families(options: DBOptions,
-                                        path: *const i8,
-                                        num_column_families: c_int,
-                                        column_family_names: *const *const i8,
-                                        column_family_options: *const DBOptions,
-                                        column_family_handles: *const DBCFHandle,
-                                        err: *mut *const i8
-                                        ) -> DBInstance;
-    pub fn rocksdb_create_column_family(db: DBInstance,
-                                        column_family_options: DBOptions,
-                                        column_family_name: *const i8,
-                                        err: *mut *const i8)
-                                        -> DBCFHandle;
-    pub fn rocksdb_drop_column_family(db: DBInstance,
-                                      column_family_handle: DBCFHandle,
-                                      err: *mut *const i8);
-    pub fn rocksdb_column_family_handle_destroy(column_family_handle: DBCFHandle);
-
-}
-
-#[test]
-fn internal() {
-    unsafe {
-        use std::ffi::CString;
-        let opts = rocksdb_options_create();
-        assert!(!opts.is_null());
-
-        rocksdb_options_increase_parallelism(opts, 0);
-        rocksdb_options_optimize_level_style_compaction(opts, 0);
-        rocksdb_options_set_create_if_missing(opts, true);
-
-        let rustpath = "_rust_rocksdb_internaltest";
-        let cpath = CString::new(rustpath).unwrap();
-        let cpath_ptr = cpath.as_ptr();
-
-        let mut err: *const i8 = 0 as *const i8;
-        let err_ptr: *mut *const i8 = &mut err;
-        let db = rocksdb_open(opts, cpath_ptr as *const _, err_ptr);
-        if !err.is_null() {
-            println!("failed to open rocksdb: {}", error_message(err));
-        }
-        assert!(err.is_null());
-
-        let writeopts = rocksdb_writeoptions_create();
-        assert!(!writeopts.is_null());
-
-        let key = b"name\x00";
-        let val = b"spacejam\x00";
-        rocksdb_put(db,
-                    writeopts.clone(),
-                    key.as_ptr(),
-                    4,
-                    val.as_ptr(),
-                    8,
-                    err_ptr);
-        rocksdb_writeoptions_destroy(writeopts);
-        assert!(err.is_null());
-
-        let readopts = rocksdb_readoptions_create();
-        assert!(!readopts.is_null());
-
-        let val_len: size_t = 0;
-        let val_len_ptr = &val_len as *const size_t;
-        rocksdb_get(db,
-                    readopts.clone(),
-                    key.as_ptr(),
-                    4,
-                    val_len_ptr,
-                    err_ptr);
-        rocksdb_readoptions_destroy(readopts);
-        assert!(err.is_null());
-        rocksdb_close(db);
-        rocksdb_destroy_db(opts, cpath_ptr as *const _, err_ptr);
-        assert!(err.is_null());
-    }
-}

rocksdb-sys/src/lib.rs

@@ -1,5 +1,5 @@
 //
-// Copyright 2014 Tyler Neely
+// Copyright 2014 Tyler Neely, 2016 Alex Regueiro
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -13,6 +13,689 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
-pub use ffi as rocksdb_ffi;
+
-pub use ffi::{DBCompactionStyle, DBComparator, DBCompressionType, DBRecoveryMode, new_bloom_filter};
+//! Raw bindings for RocksDB.
-pub mod ffi;
+//!
+//! This is simply a raw interface to the RocksDB C API. It is intended to underpin a higher-level library rather than for direct use.
+
+#![allow(dead_code, non_camel_case_types, non_upper_case_globals, non_snake_case)]
+
+extern crate libc;
+
+#[cfg(test)]
+mod test;
+
+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_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_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_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_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_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);
+
+    pub fn rocksdb_backup_engine_close(be: *mut rocksdb_backup_engine_t);
+
+    pub fn rocksdb_open_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, errptr: *mut *mut c_char) -> *mut rocksdb_t;
+
+    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_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_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_create_snapshot(db: *mut rocksdb_t) -> *const rocksdb_snapshot_t;
+
+    pub fn rocksdb_release_snapshot(db: *mut rocksdb_t, snapshot: *const rocksdb_snapshot_t);
+
+    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_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_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);
+
+    // Management operations
+
+    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);
+
+    // Iterator
+
+    pub fn rocksdb_iter_destroy(iterator: *mut rocksdb_iterator_t);
+
+    pub fn rocksdb_iter_valid(iterator: *const rocksdb_iterator_t) -> c_uchar;
+
+    pub fn rocksdb_iter_seek_to_first(iterator: *mut rocksdb_iterator_t);
+
+    pub fn rocksdb_iter_seek_to_last(iterator: *mut rocksdb_iterator_t);
+
+    pub fn rocksdb_iter_seek(iterator: *mut rocksdb_iterator_t, k: *const c_char, klen: size_t);
+
+    pub fn rocksdb_iter_next(iterator: *mut rocksdb_iterator_t);
+
+    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_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);
+
+    // Write batch
+
+    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_destroy(batch: *mut rocksdb_writebatch_t);
+
+    pub fn rocksdb_writebatch_clear(batch: *mut rocksdb_writebatch_t);
+
+    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;
+
+    // Block-based table options
+
+    pub fn rocksdb_block_based_options_create() -> *mut rocksdb_block_based_table_options_t;
+
+    pub fn rocksdb_block_based_options_destroy(options: *mut rocksdb_block_based_table_options_t);
+
+    pub fn rocksdb_block_based_options_set_block_size(options: *mut rocksdb_block_based_table_options_t, v: size_t);
+
+    pub fn rocksdb_block_based_options_set_block_size_deviation(options: *mut rocksdb_block_based_table_options_t, v: c_int);
+
+    pub fn rocksdb_block_based_options_set_block_restart_interval(options: *mut rocksdb_block_based_table_options_t, v: c_int);
+
+    pub fn rocksdb_block_based_options_set_filter_policy(options: *mut rocksdb_block_based_table_options_t, v: *mut rocksdb_filterpolicy_t);
+
+    pub fn rocksdb_block_based_options_set_no_block_cache(options: *mut rocksdb_block_based_table_options_t, v: c_uchar);
+
+    pub fn rocksdb_block_based_options_set_block_cache(options: *mut rocksdb_block_based_table_options_t, v: *mut rocksdb_cache_t);
+
+    pub fn rocksdb_block_based_options_set_block_cache_compressed(options: *mut rocksdb_block_based_table_options_t, v: *mut rocksdb_cache_t);
+
+    pub fn rocksdb_block_based_options_set_whole_key_filtering(options: *mut rocksdb_block_based_table_options_t, v: c_uchar);
+
+    pub fn rocksdb_block_based_options_set_format_version(options: *mut rocksdb_block_based_table_options_t, v: c_int);
+
+    pub fn rocksdb_block_based_options_set_index_type(options: *mut rocksdb_block_based_table_options_t, v: c_int);
+
+    pub fn rocksdb_block_based_options_set_hash_index_allow_collision(options: *mut rocksdb_block_based_table_options_t, v: c_uchar);
+
+    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_skip_table_builder_flush(options: *mut rocksdb_block_based_table_options_t, skip_table_builder_flush: c_uchar);
+
+    pub fn rocksdb_options_set_block_based_table_factory(opt: *mut rocksdb_options_t, table_options: *mut rocksdb_block_based_table_options_t);
+
+    // Cuckoo table options
+
+    pub fn rocksdb_cuckoo_options_create() -> *mut rocksdb_cuckoo_table_options_t;
+
+    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_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_options_set_cuckoo_table_factory(opt: *mut rocksdb_options_t, table_options: *mut rocksdb_cuckoo_table_options_t);
+
+    // Options
+
+    pub fn rocksdb_options_create() -> *mut rocksdb_options_t;
+
+    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_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_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_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_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_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_error_if_exists(opt: *mut rocksdb_options_t, v: c_uchar);
+
+    pub fn rocksdb_options_set_paranoid_checks(opt: *mut rocksdb_options_t, v: c_uchar);
+
+    pub fn rocksdb_options_set_env(opt: *mut rocksdb_options_t, env: *mut rocksdb_env_t);
+
+    pub fn rocksdb_options_set_info_log(opt: *mut rocksdb_options_t, l: *mut rocksdb_logger_t);
+
+    pub fn rocksdb_options_set_info_log_level(opt: *mut rocksdb_options_t, v: c_int);
+
+    pub fn rocksdb_options_set_write_buffer_size(opt: *mut rocksdb_options_t, s: size_t);
+
+    pub fn rocksdb_options_set_db_write_buffer_size(opt: *mut rocksdb_options_t, s: size_t);
+
+    pub fn rocksdb_options_set_max_open_files(opt: *mut rocksdb_options_t, n: c_int);
+
+    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_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_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);
+
+    pub fn rocksdb_options_set_max_mem_compaction_level(opt: *mut rocksdb_options_t, n: c_int);
+
+    pub fn rocksdb_options_set_target_file_size_base(opt: *mut rocksdb_options_t, n: uint64_t);
+
+    pub fn rocksdb_options_set_target_file_size_multiplier(opt: *mut rocksdb_options_t, n: c_int);
+
+    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_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_bytes_for_level_multiplier_additional(opt: *mut rocksdb_options_t, level_values: *mut c_int, num_levels: size_t);
+
+    pub fn rocksdb_options_enable_statistics(opt: *mut rocksdb_options_t);
+
+    pub fn rocksdb_options_statistics_get_string(opt: *mut rocksdb_options_t) -> *mut c_char;
+
+    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_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);
+
+    pub fn rocksdb_options_set_max_background_flushes(opt: *mut rocksdb_options_t, n: c_int);
+
+    pub fn rocksdb_options_set_max_log_file_size(opt: *mut rocksdb_options_t, v: size_t);
+
+    pub fn rocksdb_options_set_log_file_time_to_roll(opt: *mut rocksdb_options_t, v: size_t);
+
+    pub fn rocksdb_options_set_keep_log_file_num(opt: *mut rocksdb_options_t, v: size_t);
+
+    pub fn rocksdb_options_set_recycle_log_file_num(opt: *mut rocksdb_options_t, v: size_t);
+
+    pub fn rocksdb_options_set_soft_rate_limit(opt: *mut rocksdb_options_t, v: f64);
+
+    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_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_arena_block_size(opt: *mut rocksdb_options_t, v: size_t);
+
+    pub fn rocksdb_options_set_use_fsync(opt: *mut rocksdb_options_t, v: c_int);
+
+    pub fn rocksdb_options_set_db_log_dir(opt: *mut rocksdb_options_t, v: *const c_char);
+
+    pub fn rocksdb_options_set_wal_dir(opt: *mut rocksdb_options_t, v: *const c_char);
+
+    pub fn rocksdb_options_set_WAL_ttl_seconds(opt: *mut rocksdb_options_t, ttl: uint64_t);
+
+    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_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);
+
+    pub fn rocksdb_options_set_allow_mmap_reads(opt: *mut rocksdb_options_t, v: c_uchar);
+
+    pub fn rocksdb_options_set_allow_mmap_writes(opt: *mut rocksdb_options_t, v: c_uchar);
+
+    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_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_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_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_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_source_compaction_factor(opt: *mut rocksdb_options_t, v: c_int);
+
+    pub fn rocksdb_options_prepare_for_bulk_load(opt: *mut rocksdb_options_t);
+
+    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_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_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_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_bloom_locality(opt: *mut rocksdb_options_t, v: uint32_t);
+
+    pub fn rocksdb_options_set_inplace_update_support(opt: *mut rocksdb_options_t, v: c_uchar);
+
+    pub fn rocksdb_options_set_inplace_update_num_locks(opt: *mut rocksdb_options_t, v: size_t);
+
+    pub fn rocksdb_options_set_report_bg_io_stats(opt: *mut rocksdb_options_t, v: c_int);
+
+    pub fn rocksdb_options_set_wal_recovery_mode(opt: *mut rocksdb_options_t, v: c_int);
+
+    pub fn rocksdb_options_set_compression(opt: *mut rocksdb_options_t, t: c_int);
+
+    pub fn rocksdb_options_set_compaction_style(opt: *mut rocksdb_options_t, style: c_int);
+
+    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);
+
+    // 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_destroy(filter: *mut rocksdb_compactionfilter_t);
+
+    // Compaction Filter context
+
+    pub fn rocksdb_compactionfiltercontext_is_full_compaction(context: *mut rocksdb_compactionfiltercontext_t) -> c_uchar;
+
+    pub fn rocksdb_compactionfiltercontext_is_manual_compaction(context: *mut rocksdb_compactionfiltercontext_t) -> c_uchar;
+
+    // Compaction Filter factory
+
+    pub fn rocksdb_compactionfilterfactory_create(state: *mut c_void, destructor: Option<unsafe extern "C" fn(state: *mut c_void)>, create_compaction_filter: Option<unsafe extern "C" fn(state: *mut c_void, context: *mut rocksdb_compactionfiltercontext_t) -> *mut rocksdb_compactionfilter_t>, name: Option<unsafe extern "C" fn(state: *mut c_void) -> *const c_char>) -> *mut rocksdb_compactionfilterfactory_t;
+
+    pub fn rocksdb_compactionfilterfactory_destroy(factory: *mut rocksdb_compactionfilterfactory_t);
+
+    // 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_destroy(cmp: *mut rocksdb_comparator_t);
+
+    // Filter policy
+
+    pub fn rocksdb_filterpolicy_create(state: *mut c_void, destructor: Option<unsafe extern "C" fn(state: *mut c_void)>, create_filter: Option<unsafe extern "C" fn(state: *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>, key_may_match: Option<unsafe extern "C" fn(state: *mut c_void, key: *const c_char, length: size_t, filter: *const c_char, filter_length: size_t) -> c_uchar>, delete_filter: Option<unsafe extern "C" fn(state: *mut c_void, filter: *const c_char, filter_length: size_t)>, name: Option<unsafe extern "C" fn(state: *mut c_void) -> *const c_char>) -> *mut rocksdb_filterpolicy_t;
+
+    pub fn rocksdb_filterpolicy_destroy(filter: *mut rocksdb_filterpolicy_t);
+
+    pub fn rocksdb_filterpolicy_create_bloom(bits_per_key: c_int) -> *mut rocksdb_filterpolicy_t;
+
+    pub fn rocksdb_filterpolicy_create_bloom_full(bits_per_key: c_int) -> *mut rocksdb_filterpolicy_t;
+
+    // Merge Operator
+
+    pub fn rocksdb_mergeoperator_create(state: *mut c_void, destructor: Option<unsafe extern "C" fn(state: *mut c_void)>, full_merge: Option<unsafe extern "C" fn(state: *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 c_uchar, new_value_length: *mut size_t) -> *mut c_char>, partial_merge: Option<unsafe extern "C" fn(state: *mut c_void, key: *const c_char, key_length: size_t, operands_list: *const *const c_char, operands_list_length: *const size_t, num_operands: c_int, success: *mut c_uchar, new_value_length: *mut size_t) -> *mut c_char>, delete_value: Option<unsafe extern "C" fn(state: *mut c_void, value: *const c_char, value_length: size_t)>, name: Option<unsafe extern "C" fn(state: *mut c_void) -> *const c_char>) -> *mut rocksdb_mergeoperator_t;
+
+    pub fn rocksdb_mergeoperator_destroy(merge_operator: *mut rocksdb_mergeoperator_t);
+
+    // Read options
+
+    pub fn rocksdb_readoptions_create() -> *mut rocksdb_readoptions_t;
+
+    pub fn rocksdb_readoptions_destroy(opt: *mut rocksdb_readoptions_t);
+
+    pub fn rocksdb_readoptions_set_verify_checksums(opt: *mut rocksdb_readoptions_t, v: c_uchar);
+
+    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_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);
+
+    pub fn rocksdb_readoptions_set_tailing(opt: *mut rocksdb_readoptions_t, v: c_uchar);
+
+    pub fn rocksdb_readoptions_set_readahead_size(opt: *mut rocksdb_readoptions_t, v: size_t);
+
+    // Write options
+
+    pub fn rocksdb_writeoptions_create() -> *mut rocksdb_writeoptions_t;
+
+    pub fn rocksdb_writeoptions_destroy(opt: *mut rocksdb_writeoptions_t);
+
+    pub fn rocksdb_writeoptions_set_sync(opt: *mut rocksdb_writeoptions_t, v: c_uchar);
+
+    pub fn rocksdb_writeoptions_disable_WAL(opt: *mut rocksdb_writeoptions_t, disable: c_int);
+
+    // Flush options
+
+    pub fn rocksdb_flushoptions_create() -> *mut rocksdb_flushoptions_t;
+
+    pub fn rocksdb_flushoptions_destroy(opt: *mut rocksdb_flushoptions_t);
+
+    pub fn rocksdb_flushoptions_set_wait(opt: *mut rocksdb_flushoptions_t, v: c_uchar);
+
+    // Cache
+
+    pub fn rocksdb_cache_create_lru(capacity: size_t) -> *mut rocksdb_cache_t;
+
+    pub fn rocksdb_cache_destroy(cache: *mut rocksdb_cache_t);
+
+    pub fn rocksdb_cache_set_capacity(cache: *mut rocksdb_cache_t, capacity: size_t);
+
+    // Environment
+
+    pub fn rocksdb_create_default_env() -> *mut rocksdb_env_t;
+
+    pub fn rocksdb_create_mem_env() -> *mut rocksdb_env_t;
+
+    pub fn rocksdb_env_set_background_threads(env: *mut rocksdb_env_t, n: c_int);
+
+    pub fn rocksdb_env_set_high_priority_background_threads(env: *mut rocksdb_env_t, n: c_int);
+
+    pub fn rocksdb_env_join_all_threads(env: *mut rocksdb_env_t);
+
+    pub fn rocksdb_env_destroy(env: *mut rocksdb_env_t);
+
+    // Slice Transform
+
+    pub fn rocksdb_slicetransform_create(state: *mut c_void, destructor: Option<unsafe extern "C" fn(state: *mut c_void)>, transform: Option<unsafe extern "C" fn(state: *mut c_void, key: *const c_char, length: size_t, dst_length: *mut size_t) -> *mut c_char>, in_domain: Option<unsafe extern "C" fn(state: *mut c_void, key: *const c_char, length: size_t) -> c_uchar>, in_range: Option<unsafe extern "C" fn(state: *mut c_void, key: *const c_char, length: size_t) -> c_uchar>, name: Option<unsafe extern "C" fn(state: *mut c_void) -> *const c_char>) -> *mut rocksdb_slicetransform_t;
+
+    pub fn rocksdb_slicetransform_create_fixed_prefix(len: size_t) -> *mut rocksdb_slicetransform_t;
+
+    pub fn rocksdb_slicetransform_create_noop() -> *mut rocksdb_slicetransform_t;
+
+    pub fn rocksdb_slicetransform_destroy(st: *mut rocksdb_slicetransform_t);
+
+    // Universal Compaction options
+
+    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);
+
+    pub fn rocksdb_universal_compaction_options_set_min_merge_width(uco: *mut rocksdb_universal_compaction_options_t, w: c_int);
+
+    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_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);
+
+    pub fn rocksdb_universal_compaction_options_destroy(uco: *mut rocksdb_universal_compaction_options_t);
+
+    pub fn rocksdb_fifo_compaction_options_create() -> *mut rocksdb_fifo_compaction_options_t;
+
+    pub fn rocksdb_fifo_compaction_options_set_max_table_files_size(fifo_opts: *mut rocksdb_fifo_compaction_options_t, size: uint64_t);
+
+    pub fn rocksdb_fifo_compaction_options_destroy(fifo_opts: *mut rocksdb_fifo_compaction_options_t);
+
+    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_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_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_free(ptr: *mut c_void);
+}
+
+pub const rocksdb_block_based_table_index_type_binary_search: c_int = 0;
+pub const rocksdb_block_based_table_index_type_hash_search: c_int = 1;
+
+pub const rocksdb_no_compression: c_int = 0;
+pub const rocksdb_snappy_compression: c_int = 1;
+pub const rocksdb_zlib_compression: c_int = 2;
+pub const rocksdb_bz2_compression: c_int = 3;
+pub const rocksdb_lz4_compression: c_int = 4;
+pub const rocksdb_lz4hc_compression: c_int = 5;
+
+pub const rocksdb_level_compaction: c_int = 0;
+pub const rocksdb_universal_compaction: c_int = 1;
+pub const rocksdb_fifo_compaction: c_int = 2;
+
+pub const rocksdb_similar_size_compaction_stop_style: c_int = 0;
+pub const rocksdb_total_size_compaction_stop_style: c_int = 1;
+
+pub enum rocksdb_t { }
+
+pub enum rocksdb_backup_engine_t { }
+
+pub enum rocksdb_backup_engine_info_t { }
+
+pub enum rocksdb_restore_options_t { }
+
+pub enum rocksdb_cache_t { }
+
+pub enum rocksdb_compactionfilter_t { }
+
+pub enum rocksdb_compactionfiltercontext_t { }
+
+pub enum rocksdb_compactionfilterfactory_t { }
+
+pub enum rocksdb_comparator_t { }
+
+pub enum rocksdb_env_t { }
+
+pub enum rocksdb_fifo_compaction_options_t { }
+
+pub enum rocksdb_filelock_t { }
+
+pub enum rocksdb_filterpolicy_t { }
+
+pub enum rocksdb_flushoptions_t { }
+
+pub enum rocksdb_iterator_t { }
+
+pub enum rocksdb_logger_t { }
+
+pub enum rocksdb_mergeoperator_t { }
+
+pub enum rocksdb_options_t { }
+
+pub enum rocksdb_block_based_table_options_t { }
+
+pub enum rocksdb_cuckoo_table_options_t { }
+
+pub enum rocksdb_randomfile_t { }
+
+pub enum rocksdb_readoptions_t { }
+
+pub enum rocksdb_seqfile_t { }
+
+pub enum rocksdb_slicetransform_t { }
+
+pub enum rocksdb_snapshot_t { }
+
+pub enum rocksdb_writablefile_t { }
+
+pub enum rocksdb_writebatch_t { }
+
+pub enum rocksdb_writeoptions_t { }
+
+pub enum rocksdb_universal_compaction_options_t { }
+
+pub enum rocksdb_livefiles_t { }
+
+pub enum rocksdb_column_family_handle_t { }

rocksdb-sys/src/test.rs

@@ -0,0 +1,86 @@
+// Copyright 2014 Tyler Neely
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+use libc::*;
+use std::ffi::{CStr, CString};
+use std::ptr;
+use std::str;
+
+use super::*;
+
+pub fn error_message(ptr: *const i8) -> String {
+    let c_str = unsafe { CStr::from_ptr(ptr as *const _) };
+    let s = str::from_utf8(c_str.to_bytes()).unwrap().to_owned();
+    unsafe {
+        free(ptr as *mut c_void);
+    }
+    s
+}
+
+#[test]
+fn internal() {
+    unsafe {
+        let opts = rocksdb_options_create();
+        assert!(!opts.is_null());
+
+        rocksdb_options_increase_parallelism(opts, 0);
+        rocksdb_options_optimize_level_style_compaction(opts, 0);
+        rocksdb_options_set_create_if_missing(opts, true as c_uchar);
+
+        let rustpath = "_rust_rocksdb_internaltest";
+        let cpath = CString::new(rustpath).unwrap();
+        let cpath_ptr = cpath.as_ptr();
+
+        let mut err: *mut c_char = ptr::null_mut();
+        let err_ptr: *mut *mut c_char = &mut err;
+        let db = rocksdb_open(opts, cpath_ptr as *const _, err_ptr);
+        if !err.is_null() {
+            println!("failed to open rocksdb: {}", error_message(err));
+        }
+        assert!(err.is_null());
+
+        let writeopts = rocksdb_writeoptions_create();
+        assert!(!writeopts.is_null());
+
+        let key = b"name\x00";
+        let val = b"spacejam\x00";
+        rocksdb_put(db,
+                    writeopts.clone(),
+                    key.as_ptr() as *const c_char,
+                    4,
+                    val.as_ptr() as *const c_char,
+                    8,
+                    err_ptr);
+        rocksdb_writeoptions_destroy(writeopts);
+        assert!(err.is_null());
+
+        let readopts = rocksdb_readoptions_create();
+        assert!(!readopts.is_null());
+
+        let mut val_len: size_t = 0;
+        let val_len_ptr = &mut val_len as *mut size_t;
+        rocksdb_get(db,
+                    readopts.clone(),
+                    key.as_ptr() as *const c_char,
+                    4,
+                    val_len_ptr,
+                    err_ptr);
+        rocksdb_readoptions_destroy(readopts);
+        assert!(err.is_null());
+        rocksdb_close(db);
+        rocksdb_destroy_db(opts, cpath_ptr as *const _, err_ptr);
+        assert!(err.is_null());
+    }
+}

rocksdb-sys/tests/ffi.rs

@@ -0,0 +1,950 @@
+// This code is based on <https://github.com/facebook/rocksdb/blob/master/db/c_test.c>, revision a10e8a056d569acf6a52045124e6414ad33bdfcd.
+
+#![allow(non_snake_case, non_upper_case_globals, unused_mut, unused_unsafe, unused_variables)]
+
+#[macro_use]
+extern crate const_cstr;
+extern crate libc;
+extern crate rocksdb_sys as ffi;
+
+use ::ffi::*;
+use ::libc::*;
+use ::std::borrow::Cow;
+use ::std::env;
+use ::std::ffi::{CStr, CString};
+use ::std::io::Write;
+use ::std::mem;
+use ::std::path::PathBuf;
+use ::std::ptr;
+use ::std::slice;
+use ::std::str;
+
+macro_rules! err_println {
+    ($($arg:tt)*) => (writeln!(&mut ::std::io::stderr(), $($arg)*).expect("failed printing to stderr"));
+}
+
+macro_rules! cstr {
+    ($($arg:tt)*) => (const_cstr!($($arg)*));
+}
+
+macro_rules! cstrp {
+    ($($arg:tt)*) => (const_cstr!($($arg)*).as_ptr());
+}
+
+static mut phase: &'static str = "";
+// static mut dbname: *mut c_uchar = ptr::null_mut();
+// static mut dbbackupname: *mut c_uchar = ptr::null_mut();
+
+unsafe fn strndup(s: *const c_char, n: size_t) -> *mut c_char {
+    let r: *mut c_char = malloc(n + 1) as *mut c_char;
+    if r.is_null() {
+        return r;
+    }
+    strncpy(r, s, n)
+}
+
+unsafe fn rstr<'a>(s: *const c_char) -> Cow<'a, str> {
+    CStr::from_ptr(s).to_string_lossy()
+}
+
+fn GetTempDir() -> PathBuf {
+    return match option_env!("TEST_TMPDIR") {
+        Some("") | None => env::temp_dir(),
+        Some(s) => s.into(),
+    };
+}
+
+unsafe fn StartPhase(name: &'static str) {
+    err_println!("=== Test {}\n", name);
+    phase = name;
+}
+
+macro_rules! CheckNoError {
+    ($err:ident) => { unsafe {
+        assert!($err.is_null(), "{}: {}", phase, rstr($err));
+    } };
+}
+
+macro_rules! CheckCondition {
+    ($cond:expr) => { unsafe {
+        assert!($cond, "{}: {}", phase, stringify!($cond));
+    } };
+}
+
+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 {
+        // ok
+    } else {
+        panic!("{}: expected '{}', got '{}'", phase, rstr(strndup(expected, n)), rstr(strndup(v, 5)));
+    }
+}
+
+unsafe fn Free<T>(ptr: *mut *mut T) {
+    if !(*ptr).is_null() {
+        free(*ptr as *mut c_void);
+        *ptr = ptr::null_mut();
+    }
+}
+
+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);
+    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) {
+    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);
+    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) {
+    let mut len: size_t = 0;
+    let mut str: *const c_char;
+    str = rocksdb_iter_key(iter, &mut len);
+    CheckEqual(key, str, len);
+    str = rocksdb_iter_value(iter, &mut len);
+    CheckEqual(val, str, len);
+}
+
+// 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) {
+    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) {
+    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 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 {
+            r = -1;
+        } else if alen > blen {
+            r = 1;
+        }
+    }
+    r
+}
+
+unsafe extern "C" fn CmpName(arg: *mut c_void) -> *const c_char {
+    cstrp!("foo")
+}
+
+// Custom filter policy
+
+static mut fake_filter_result: c_uchar = 1;
+
+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 {
+    *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 {
+    CheckCondition!(filter_length == 4);
+    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 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 {
+    if key_length == 3 {
+        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 {
+            *value_changed = 1;
+            *new_value = cstrp!("newbazvalue") as *mut c_char;
+            *new_value_length = 11;
+            return 0;
+        }
+    }
+    0
+}
+
+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))
+}
+
+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);
+    CheckNoError!(err);
+    CheckGet(db, roptions, cstrp!("foo"), cstrp!("foovalue"));
+    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);
+    CheckNoError!(err);
+    CheckGet(db, roptions, cstrp!("baz"), cstrp!("bazvalue"));
+
+    // Force compaction
+    rocksdb_compact_range(db, ptr::null(), 0, ptr::null(), 0);
+    // should have filtered bar, but not foo
+    CheckGet(db, roptions, cstrp!("foo"), cstrp!("foovalue"));
+    CheckGet(db, roptions, cstrp!("bar"), ptr::null());
+    CheckGet(db, roptions, cstrp!("baz"), cstrp!("newbazvalue"));
+    db
+}
+
+// Custom merge operator
+
+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 {
+    *new_value_length = 4;
+    *success = 1;
+    let result: *mut c_char = malloc(4) as *mut _;
+    memcpy(result as *mut _, cstrp!("fake") as *mut _, 4);
+    result
+}
+
+unsafe extern "C" fn MergeOperatorPartialMerge(arg: *mut c_void, key: *const c_char, key_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 _;
+    memcpy(result as *mut _, cstrp!("fake") as *const _, 4);
+    result
+}
+
+#[test]
+fn ffi() {
+    unsafe {
+        let mut db: *mut rocksdb_t;
+        let mut cmp: *mut rocksdb_comparator_t;
+        let mut cache: *mut rocksdb_cache_t;
+        let mut env: *mut rocksdb_env_t;
+        let mut options: *mut rocksdb_options_t;
+        let mut table_options: *mut rocksdb_block_based_table_options_t;
+        let mut roptions: *mut rocksdb_readoptions_t;
+        let mut woptions: *mut rocksdb_writeoptions_t;
+        let mut err: *mut c_char = ptr::null_mut();
+        let run: c_int = -1;
+
+        let dbname = {
+            let mut dir = GetTempDir();
+            dir.push(format!("rocksdb_c_test-{}", geteuid()));
+            let path = dir.to_str().unwrap();
+            CString::new(path).unwrap()
+        };
+        let dbbackupname = {
+            let mut dir = GetTempDir();
+            dir.push(format!("rocksdb_c_test-{}-backup", geteuid()));
+            let path = dir.to_str().unwrap();
+            CString::new(path).unwrap()
+        };
+
+        let dbname = dbname.as_ptr();
+        let dbbackupname = dbbackupname.as_ptr();
+
+        StartPhase("create_objects");
+        cmp = rocksdb_comparator_create(ptr::null_mut(), Some(CmpDestroy), Some(CmpCompare), Some(CmpName));
+        env = rocksdb_create_default_env();
+        cache = rocksdb_cache_create_lru(100000);
+
+        options = rocksdb_options_create();
+        rocksdb_options_set_comparator(options, cmp);
+        rocksdb_options_set_error_if_exists(options, 1);
+        rocksdb_options_set_env(options, env);
+        rocksdb_options_set_info_log(options, ptr::null_mut());
+        rocksdb_options_set_write_buffer_size(options, 100000);
+        rocksdb_options_set_paranoid_checks(options, 1);
+        rocksdb_options_set_max_open_files(options, 10);
+        table_options = rocksdb_block_based_options_create();
+        rocksdb_block_based_options_set_block_cache(table_options, cache);
+        rocksdb_options_set_block_based_table_factory(options, table_options);
+
+        let no_compression = rocksdb_no_compression;
+        rocksdb_options_set_compression(options, no_compression);
+        rocksdb_options_set_compression_options(options, -14, -1, 0, 0);
+        let compression_levels = vec![
+            no_compression,
+            no_compression,
+            no_compression,
+            no_compression,
+            ];
+        rocksdb_options_set_compression_per_level(options,
+            mem::transmute(compression_levels.as_ptr()),
+            compression_levels.len() as size_t);
+
+        roptions = rocksdb_readoptions_create();
+        rocksdb_readoptions_set_verify_checksums(roptions, 1);
+        rocksdb_readoptions_set_fill_cache(roptions, 0);
+
+        woptions = rocksdb_writeoptions_create();
+        rocksdb_writeoptions_set_sync(woptions, 1);
+
+        StartPhase("destroy");
+        rocksdb_destroy_db(options, dbname, &mut err);
+        Free(&mut err);
+
+        StartPhase("open_error");
+        rocksdb_open(options, dbname, &mut err);
+        CheckCondition!(!err.is_null());
+        Free(&mut err);
+
+        StartPhase("open");
+        rocksdb_options_set_create_if_missing(options, 1);
+        db = rocksdb_open(options, dbname, &mut err);
+        CheckNoError!(err);
+        CheckGet(db, roptions, cstrp!("foo") as *const _, ptr::null());
+
+        StartPhase("put");
+        rocksdb_put(db, woptions, cstrp!("foo"), 3, cstrp!("hello"), 5, &mut err);
+        CheckNoError!(err);
+        CheckGet(db, roptions, cstrp!("foo"), cstrp!("hello"));
+
+        StartPhase("backup_and_restore");
+        {
+            rocksdb_destroy_db(options, dbbackupname, &mut err);
+            CheckNoError!(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);
+            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);
+            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);
+            CheckCondition!(rocksdb_backup_engine_info_count(bei) == 1);
+            rocksdb_backup_engine_info_destroy(bei);
+
+            rocksdb_delete(db, woptions, cstrp!("foo"), 3, &mut err);
+            CheckNoError!(err);
+
+            rocksdb_close(db);
+
+            rocksdb_destroy_db(options, dbname, &mut err);
+            CheckNoError!(err);
+
+            let restore_options = rocksdb_restore_options_create();
+            rocksdb_restore_options_set_keep_log_files(restore_options, 0);
+            rocksdb_backup_engine_restore_db_from_latest_backup(be, dbname, dbname, restore_options, &mut err);
+            CheckNoError!(err);
+            rocksdb_restore_options_destroy(restore_options);
+
+            rocksdb_options_set_error_if_exists(options, 0);
+            db = rocksdb_open(options, dbname, &mut err);
+            CheckNoError!(err);
+            rocksdb_options_set_error_if_exists(options, 1);
+
+            CheckGet(db, roptions, cstrp!("foo"), cstrp!("hello"));
+
+            rocksdb_backup_engine_close(be);
+        }
+
+        StartPhase("compactall");
+        rocksdb_compact_range(db, ptr::null(), 0, ptr::null(), 0);
+        CheckGet(db, roptions, cstrp!("foo"), cstrp!("hello"));
+
+        StartPhase("compactrange");
+        rocksdb_compact_range(db, cstrp!("a"), 1, cstrp!("z"), 1);
+        CheckGet(db, roptions, cstrp!("foo"), cstrp!("hello"));
+
+        StartPhase("writebatch");
+        {
+            let mut wb = rocksdb_writebatch_create();
+            rocksdb_writebatch_put(wb, cstrp!("foo"), 3, cstrp!("a"), 1);
+            rocksdb_writebatch_clear(wb);
+            rocksdb_writebatch_put(wb, cstrp!("bar"), 3, cstrp!("b"), 1);
+            rocksdb_writebatch_put(wb, cstrp!("box"), 3, cstrp!("c"), 1);
+            rocksdb_writebatch_delete(wb, cstrp!("bar"), 3);
+            rocksdb_write(db, woptions, wb, &mut err);
+            CheckNoError!(err);
+            CheckGet(db, roptions, cstrp!("foo"), cstrp!("hello"));
+            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));
+            CheckCondition!(pos == 3);
+            rocksdb_writebatch_destroy(wb);
+        }
+
+        StartPhase("writebatch_vectors");
+        {
+            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_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_write(db, woptions, wb, &mut err);
+            CheckNoError!(err);
+            CheckGet(db, roptions, cstrp!("zap"), cstrp!("xyz"));
+            rocksdb_writebatch_delete(wb, cstrp!("zap"), 3);
+            rocksdb_write(db, woptions, wb, &mut err);
+            CheckNoError!(err);
+            CheckGet(db, roptions, cstrp!("zap"), ptr::null());
+            rocksdb_writebatch_destroy(wb);
+        }
+
+        StartPhase("writebatch_rep");
+        {
+            let wb1: *mut rocksdb_writebatch_t = rocksdb_writebatch_create();
+            rocksdb_writebatch_put(wb1, cstrp!("baz"), 3, cstrp!("d"), 1);
+            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 repsize2: size_t = 0;
+            CheckCondition!(memcmp(rep, rocksdb_writebatch_data(wb2, &mut repsize2) as *const c_void, repsize1) == 0);
+            rocksdb_writebatch_destroy(wb1);
+            rocksdb_writebatch_destroy(wb2);
+        }
+
+        StartPhase("iter");
+        {
+            let mut iter = rocksdb_create_iterator(db, roptions);
+            CheckCondition!(rocksdb_iter_valid(iter) == 0);
+            rocksdb_iter_seek_to_first(iter);
+            CheckCondition!(rocksdb_iter_valid(iter) != 0);
+            CheckIter(iter, cstrp!("box"), cstrp!("c"));
+            rocksdb_iter_next(iter);
+            CheckIter(iter, cstrp!("foo"), cstrp!("hello"));
+            rocksdb_iter_prev(iter);
+            CheckIter(iter, cstrp!("box"), cstrp!("c"));
+            rocksdb_iter_prev(iter);
+            CheckCondition!(rocksdb_iter_valid(iter) == 0);
+            rocksdb_iter_seek_to_last(iter);
+            CheckIter(iter, cstrp!("foo"), cstrp!("hello"));
+            rocksdb_iter_seek(iter, cstrp!("b"), 1);
+            CheckIter(iter, cstrp!("box"), cstrp!("c"));
+            rocksdb_iter_get_error(iter, &mut err);
+            CheckNoError!(err);
+            rocksdb_iter_destroy(iter);
+        }
+
+        StartPhase("multiget");
+        {
+            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_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());
+
+            for i in 0..3 {
+                CheckEqual(ptr::null(), errs[i], 0);
+                match i {
+                    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]);
+            }
+        }
+
+        StartPhase("approximate_sizes");
+        {
+            let mut sizes: [uint64_t; 2] = [0, 0];
+            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_len: [size_t; 2] = [21, 1];
+            rocksdb_writeoptions_set_sync(woptions, 0);
+            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);
+                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());
+            CheckCondition!(sizes[0] > 0);
+            CheckCondition!(sizes[1] > 0);
+        }
+
+        StartPhase("property");
+        {
+            let mut prop: *mut c_char;
+            prop = rocksdb_property_value(db, cstrp!("nosuchprop"));
+            CheckCondition!(prop.is_null());
+            prop = rocksdb_property_value(db, cstrp!("rocksdb.stats"));
+            CheckCondition!(!prop.is_null());
+            Free(&mut prop);
+        }
+
+        StartPhase("snapshot");
+        {
+            let snap: *const rocksdb_snapshot_t = rocksdb_create_snapshot(db);
+            rocksdb_delete(db, woptions, cstrp!("foo"), 3, &mut err);
+            CheckNoError!(err);
+            rocksdb_readoptions_set_snapshot(roptions, snap);
+            CheckGet(db, roptions, cstrp!("foo"), cstrp!("hello"));
+            rocksdb_readoptions_set_snapshot(roptions, ptr::null());
+            CheckGet(db, roptions, cstrp!("foo"), ptr::null());
+            rocksdb_release_snapshot(db, snap);
+        }
+
+        StartPhase("repair");
+        {
+            // If we do not compact here, then the lazy deletion of files (https://reviews.facebook.net/D6123) would leave around deleted files and the repair process will find those files and put them back into the database.
+            rocksdb_compact_range(db, ptr::null(), 0, ptr::null(), 0);
+            rocksdb_close(db);
+            rocksdb_options_set_create_if_missing(options, 0);
+            rocksdb_options_set_error_if_exists(options, 0);
+            // rocksdb_options_set_wal_recovery_mode(options, 2);
+            rocksdb_repair_db(options, dbname, &mut err);
+            CheckNoError!(err);
+            db = rocksdb_open(options, dbname, &mut err);
+            CheckNoError!(err);
+            CheckGet(db, roptions, cstrp!("foo"), ptr::null());
+            CheckGet(db, roptions, cstrp!("bar"), ptr::null());
+            CheckGet(db, roptions, cstrp!("box"), cstrp!("c"));
+            rocksdb_options_set_create_if_missing(options, 1);
+            rocksdb_options_set_error_if_exists(options, 1);
+        }
+
+        StartPhase("filter");
+        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))
+            } else {
+                rocksdb_filterpolicy_create_bloom(10)
+            };
+
+            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);
+            db = rocksdb_open(options, dbname, &mut err);
+            CheckNoError!(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);
+            CheckNoError!(err);
+            rocksdb_compact_range(db, ptr::null(), 0, ptr::null(), 0);
+
+            fake_filter_result = 1;
+            CheckGet(db, roptions, cstrp!("foo"), cstrp!("foovalue"));
+            CheckGet(db, roptions, cstrp!("bar"), cstrp!("barvalue"));
+            if phase == "" {
+                // Must not find value when custom filter returns false
+                fake_filter_result = 0;
+                CheckGet(db, roptions, cstrp!("foo"), ptr::null());
+                CheckGet(db, roptions, cstrp!("bar"), ptr::null());
+                fake_filter_result = 1;
+
+                CheckGet(db, roptions, cstrp!("foo"), cstrp!("foovalue"));
+                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);
+        }
+
+        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));
+            // 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());
+            rocksdb_compactionfilter_destroy(cfilter);
+            rocksdb_options_destroy(options_with_filter);
+        }
+
+        StartPhase("compaction_filter_factory");
+        {
+            let mut options_with_filter_factory = rocksdb_options_create();
+            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);
+
+            rocksdb_options_set_compaction_filter_factory(options_with_filter_factory, ptr::null_mut());
+            rocksdb_options_destroy(options_with_filter_factory);
+        }
+
+        StartPhase("merge_operator");
+        {
+            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);
+            CheckNoError!(err);
+            CheckGet(db, roptions, cstrp!("foo"), cstrp!("foovalue"));
+            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);
+            CheckNoError!(err);
+            CheckGet(db, roptions, cstrp!("bar"), cstrp!("fake"));
+        }
+
+        StartPhase("columnfamilies");
+        {
+            rocksdb_close(db);
+            rocksdb_destroy_db(options, dbname, &mut err);
+            CheckNoError!(err);
+
+            let mut db_options = rocksdb_options_create();
+            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);
+            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);
+            CheckEqual(cstrp!("default"), column_fams[0], 7);
+            CheckEqual(cstrp!("cf1"), column_fams[1], 3);
+            CheckCondition!(cflen == 2);
+            rocksdb_list_column_families_destroy(column_fams_raw, cflen);
+
+            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);
+            CheckNoError!(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);
+            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_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_delete_cf(wb, handles[1], cstrp!("bar"), 3);
+            rocksdb_write(db, woptions, wb, &mut err);
+            CheckNoError!(err);
+            CheckGetCF(db, roptions, handles[1], cstrp!("baz"), ptr::null());
+            CheckGetCF(db, roptions, handles[1], cstrp!("bar"), ptr::null());
+            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_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_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());
+
+            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]);
+            }
+
+            let mut iter = rocksdb_create_iterator_cf(db, roptions, handles[1]);
+            CheckCondition!(rocksdb_iter_valid(iter) == 0);
+            rocksdb_iter_seek_to_first(iter);
+            CheckCondition!(rocksdb_iter_valid(iter) != 0);
+
+            let mut i: u32 = 0;
+            while rocksdb_iter_valid(iter) != 0 {
+                rocksdb_iter_next(iter);
+                i += 1;
+            }
+            CheckCondition!(i == 1);
+            rocksdb_iter_get_error(iter, &mut err);
+            CheckNoError!(err);
+            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);
+            CheckNoError!(err);
+
+            iter = iters_handles[0];
+            CheckCondition!(rocksdb_iter_valid(iter) == 0);
+            rocksdb_iter_seek_to_first(iter);
+            CheckCondition!(rocksdb_iter_valid(iter) == 0);
+            rocksdb_iter_destroy(iter);
+
+            iter = iters_handles[1];
+            CheckCondition!(rocksdb_iter_valid(iter) == 0);
+            rocksdb_iter_seek_to_first(iter);
+            CheckCondition!(rocksdb_iter_valid(iter) != 0);
+
+            let mut i: u32 = 0;
+            while rocksdb_iter_valid(iter) != 0 {
+                rocksdb_iter_next(iter);
+                i += 1;
+            }
+            CheckCondition!(i == 1);
+            rocksdb_iter_get_error(iter, &mut err);
+            CheckNoError!(err);
+            rocksdb_iter_destroy(iter);
+
+            rocksdb_drop_column_family(db, handles[1], &mut err);
+            CheckNoError!(err);
+            for i in 0..2 {
+                rocksdb_column_family_handle_destroy(handles[i]);
+            }
+            rocksdb_close(db);
+            rocksdb_destroy_db(options, dbname, &mut err);
+            rocksdb_options_destroy(db_options);
+            rocksdb_options_destroy(cf_options);
+        }
+
+        StartPhase("prefix");
+        {
+            // Create new database
+            rocksdb_options_set_allow_mmap_reads(options, 1);
+            rocksdb_options_set_prefix_extractor(options, rocksdb_slicetransform_create_fixed_prefix(3));
+            rocksdb_options_set_hash_skip_list_rep(options, 5000, 4, 4);
+            rocksdb_options_set_plain_table_factory(options, 4, 10, 0.75, 16);
+
+            db = rocksdb_open(options, dbname, &mut err);
+            CheckNoError!(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);
+            CheckNoError!(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);
+            CheckNoError!(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);
+            CheckNoError!(err);
+
+            let mut iter = rocksdb_create_iterator(db, roptions);
+            CheckCondition!(rocksdb_iter_valid(iter) == 0);
+
+            rocksdb_iter_seek(iter, cstrp!("bar"), 3);
+            rocksdb_iter_get_error(iter, &mut err);
+            CheckNoError!(err);
+            CheckCondition!(rocksdb_iter_valid(iter) != 0);
+
+            CheckIter(iter, cstrp!("bar1"), cstrp!("bar"));
+            rocksdb_iter_next(iter);
+            CheckIter(iter, cstrp!("bar2"), cstrp!("bar"));
+            rocksdb_iter_next(iter);
+            CheckIter(iter, cstrp!("bar3"), cstrp!("bar"));
+            rocksdb_iter_get_error(iter, &mut err);
+            CheckNoError!(err);
+            rocksdb_iter_destroy(iter);
+
+            rocksdb_close(db);
+            rocksdb_destroy_db(options, dbname, &mut err);
+        }
+
+        StartPhase("cuckoo_options");
+        {
+            let mut cuckoo_options = rocksdb_cuckoo_options_create();
+            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_use_module_hash(cuckoo_options, 0);
+            rocksdb_options_set_cuckoo_table_factory(options, cuckoo_options);
+
+            db = rocksdb_open(options, dbname, &mut err);
+            CheckNoError!(err);
+
+            rocksdb_cuckoo_options_destroy(cuckoo_options);
+        }
+
+        StartPhase("iterate_upper_bound");
+        {
+            // Create new empty database
+            rocksdb_close(db);
+            rocksdb_destroy_db(options, dbname, &mut err);
+            CheckNoError!(err);
+
+            rocksdb_options_set_prefix_extractor(options, ptr::null_mut());
+            db = rocksdb_open(options, dbname, &mut err);
+            CheckNoError!(err);
+
+            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);
+            CheckNoError!(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);
+            CheckNoError!(err);
+
+            // testing basic case with no iterate_upper_bound and no prefix_extractor
+            {
+                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);
+                CheckCondition!(rocksdb_iter_valid(iter) != 0);
+                CheckIter(iter, cstrp!("foo"), cstrp!("bar"));
+
+                rocksdb_iter_next(iter);
+                CheckCondition!(rocksdb_iter_valid(iter) != 0);
+                CheckIter(iter, cstrp!("foo1"), cstrp!("bar1"));
+
+                rocksdb_iter_next(iter);
+                CheckCondition!(rocksdb_iter_valid(iter) != 0);
+                CheckIter(iter, cstrp!("g1"), cstrp!("0"));
+
+                rocksdb_iter_destroy(iter);
+            }
+
+            // testing iterate_upper_bound and forward iterator
+            // 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);
+
+                let mut iter = rocksdb_create_iterator(db, roptions);
+
+                rocksdb_iter_seek(iter, cstrp!("foo"), 3);
+                CheckCondition!(rocksdb_iter_valid(iter) != 0);
+                CheckIter(iter, cstrp!("foo"), cstrp!("bar"));
+
+                rocksdb_iter_next(iter);
+                CheckCondition!(rocksdb_iter_valid(iter) != 0);
+                CheckIter(iter, cstrp!("foo1"), cstrp!("bar1"));
+
+                rocksdb_iter_next(iter);
+                // should stop here...
+                CheckCondition!(rocksdb_iter_valid(iter) == 0);
+
+                rocksdb_iter_destroy(iter);
+            }
+        }
+
+        // Simple sanity check that setting memtable rep works.
+        StartPhase("memtable_reps");
+        {
+            // Create database with vector memtable.
+            rocksdb_close(db);
+            rocksdb_destroy_db(options, dbname, &mut err);
+            CheckNoError!(err);
+
+            rocksdb_options_set_memtable_vector_rep(options);
+            db = rocksdb_open(options, dbname, &mut err);
+            CheckNoError!(err);
+
+            // // Create database with hash skiplist memtable.
+            // rocksdb_close(db);
+            // rocksdb_destroy_db(options, dbname, &mut err);
+            // CheckNoError!(err);
+            //
+            // rocksdb_options_set_hash_skip_list_rep(options, 5000, 4, 4);
+            // db = rocksdb_open(options, dbname, &mut err);
+            // CheckNoError!(err);
+        }
+
+        StartPhase("cleanup");
+        rocksdb_close(db);
+        rocksdb_options_destroy(options);
+        rocksdb_block_based_options_destroy(table_options);
+        rocksdb_readoptions_destroy(roptions);
+        rocksdb_writeoptions_destroy(woptions);
+        rocksdb_cache_destroy(cache);
+        rocksdb_comparator_destroy(cmp);
+        rocksdb_env_destroy(env);
+
+        err_println!("PASS");
+    }
+}

src/comparator.rs

@@ -12,44 +12,31 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
-extern crate libc;
+
-use self::libc::{c_char, c_int, c_void, size_t};
 use std::ffi::CString;
 use std::mem;
 use std::slice;
 
+use libc::{c_char, c_int, c_void, size_t};
+
 pub struct ComparatorCallback {
     pub name: CString,
     pub f: fn(&[u8], &[u8]) -> i32,
 }
 
-pub extern "C" fn destructor_callback(raw_cb: *mut c_void) {
+pub unsafe extern "C" fn destructor_callback(raw_cb: *mut c_void) {
-    // turn this back into a local variable so rust will reclaim it
+    let _: Box<ComparatorCallback> = mem::transmute(raw_cb);
-    let _: Box<ComparatorCallback> = unsafe { mem::transmute(raw_cb) };
 }
 
-pub extern "C" fn name_callback(raw_cb: *mut c_void) -> *const c_char {
+pub unsafe extern "C" fn name_callback(raw_cb: *mut c_void) -> *const c_char {
-    unsafe {
+    let cb: &mut ComparatorCallback = &mut *(raw_cb as *mut ComparatorCallback);
-        let cb: &mut ComparatorCallback =
-            &mut *(raw_cb as *mut ComparatorCallback);
     let ptr = cb.name.as_ptr();
     ptr as *const c_char
 }
-}
 
-pub extern "C" fn compare_callback(raw_cb: *mut c_void,
+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 {
-                                   a_raw: *const c_char,
+    let cb: &mut ComparatorCallback = &mut *(raw_cb as *mut ComparatorCallback);
-                                   a_len: size_t,
+    let a: &[u8] = slice::from_raw_parts(a_raw as *const u8, a_len as usize);
-                                   b_raw: *const c_char,
+    let b: &[u8] = slice::from_raw_parts(b_raw as *const u8, b_len as usize);
-                                   b_len: size_t)
-                                   -> c_int {
-    unsafe {
-        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);
     (cb.f)(a, b)
 }
-}

src/lib.rs

@@ -12,14 +12,27 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
-extern crate rocksdb_sys;
+
-pub use rocksdb_sys::rocksdb_ffi as rocksdb_ffi;
+extern crate libc;
-pub use rocksdb_ffi::{DBCompactionStyle, DBComparator, DBCompressionType, DBRecoveryMode, new_bloom_filter};
+extern crate rocksdb_sys as ffi;
-pub use rocksdb::{DB, DBIterator, DBVector, Direction, IteratorMode, Writable,
+
-                  WriteBatch, Error};
-pub use rocksdb_options::{BlockBasedOptions, Options, WriteOptions};
-pub use merge_operator::MergeOperands;
-pub mod rocksdb;
-pub mod rocksdb_options;
 pub mod merge_operator;
 pub mod comparator;
+
+mod rocksdb;
+mod rocksdb_options;
+
+pub use rocksdb::{DB, DBCompressionType, DBCompactionStyle, DBRecoveryMode, DBIterator, DBVector, Direction, IteratorMode, Writable, WriteBatch, Error, new_bloom_filter};
+pub use merge_operator::MergeOperands;
+
+pub struct BlockBasedOptions {
+    inner: *mut ffi::rocksdb_block_based_table_options_t,
+}
+
+pub struct Options {
+    inner: *mut ffi::rocksdb_options_t,
+}
+
+pub struct WriteOptions {
+    inner: *mut ffi::rocksdb_writeoptions_t,
+}

src/merge_operator.rs

@@ -12,13 +12,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
-extern crate libc;
+
-use self::libc::{c_char, c_int, c_void, size_t};
 use std::ffi::CString;
 use std::mem;
 use std::ptr;
 use std::slice;
 
+use libc::{self, c_char, c_int, c_void, size_t};
+
 pub type MergeFn = fn(&[u8], Option<&[u8]>, &mut MergeOperands) -> Vec<u8>;
 
 pub struct MergeOperatorCallback {
@@ -26,42 +27,20 @@ pub struct MergeOperatorCallback {
     pub merge_fn: MergeFn,
 }
 
-pub extern "C" fn destructor_callback(raw_cb: *mut c_void) {
+pub unsafe extern "C" fn destructor_callback(raw_cb: *mut c_void) {
-    // turn this back into a local variable so rust will reclaim it
+    let _: Box<MergeOperatorCallback> = mem::transmute(raw_cb);
-    let _: Box<MergeOperatorCallback> = unsafe { mem::transmute(raw_cb) };
-
 }
 
-pub extern "C" fn name_callback(raw_cb: *mut c_void) -> *const c_char {
+pub unsafe extern "C" fn name_callback(raw_cb: *mut c_void) -> *const c_char {
-    unsafe {
+    let cb = &mut *(raw_cb as *mut MergeOperatorCallback);
-        let cb: &mut MergeOperatorCallback =
+    cb.name.as_ptr()
-            &mut *(raw_cb as *mut MergeOperatorCallback);
-        let ptr = cb.name.as_ptr();
-        ptr as *const c_char
-    }
 }
 
-pub extern "C" fn full_merge_callback(raw_cb: *mut c_void,
+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 {
-                                      raw_key: *const c_char,
+    let cb = &mut *(raw_cb as *mut MergeOperatorCallback);
-                                      key_len: size_t,
+    let operands = &mut MergeOperands::new(operands_list, operands_list_len, num_operands);
-                                      existing_value: *const c_char,
+    let key = slice::from_raw_parts(raw_key as *const u8, key_len as usize);
-                                      existing_value_len: size_t,
+    let oldval = slice::from_raw_parts(existing_value as *const u8, existing_value_len as usize);
-                                      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)
-                                      -> *const c_char {
-    unsafe {
-        let cb: &mut MergeOperatorCallback =
-            &mut *(raw_cb as *mut MergeOperatorCallback);
-        let operands = &mut MergeOperands::new(operands_list,
-                                               operands_list_len,
-                                               num_operands);
-        let key: &[u8] = slice::from_raw_parts(raw_key as *const u8,
-                                               key_len as usize);
-        let oldval: &[u8] = slice::from_raw_parts(existing_value as *const u8,
-                                                  existing_value_len as usize);
     let mut result = (cb.merge_fn)(key, Some(oldval), operands);
     result.shrink_to_fit();
     // TODO(tan) investigate zero-copy techniques to improve performance
@@ -70,27 +49,13 @@ pub extern "C" fn full_merge_callback(raw_cb: *mut c_void,
     *new_value_length = result.len() as size_t;
     *success = 1 as u8;
     ptr::copy(result.as_ptr() as *mut c_void, &mut *buf, result.len());
-        buf as *const c_char
+    buf as *mut c_char
-    }
 }
 
-pub extern "C" fn partial_merge_callback(raw_cb: *mut c_void,
+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 {
-                                         raw_key: *const c_char,
+    let cb = &mut *(raw_cb as *mut MergeOperatorCallback);
-                                         key_len: size_t,
+    let operands = &mut MergeOperands::new(operands_list, operands_list_len, num_operands);
-                                         operands_list: *const *const c_char,
+    let key = slice::from_raw_parts(raw_key as *const u8, key_len as usize);
-                                         operands_list_len: *const size_t,
-                                         num_operands: c_int,
-                                         success: *mut u8,
-                                         new_value_length: *mut size_t)
-                                         -> *const c_char {
-    unsafe {
-        let cb: &mut MergeOperatorCallback =
-            &mut *(raw_cb as *mut MergeOperatorCallback);
-        let operands = &mut MergeOperands::new(operands_list,
-                                               operands_list_len,
-                                               num_operands);
-        let key: &[u8] = slice::from_raw_parts(raw_key as *const u8,
-                                               key_len as usize);
     let mut result = (cb.merge_fn)(key, None, operands);
     result.shrink_to_fit();
     // TODO(tan) investigate zero-copy techniques to improve performance
@@ -99,8 +64,7 @@ pub extern "C" fn partial_merge_callback(raw_cb: *mut c_void,
     *new_value_length = 1 as size_t;
     *success = 1 as u8;
     ptr::copy(result.as_ptr() as *mut c_void, &mut *buf, result.len());
-        buf as *const c_char
+    buf as *mut c_char
-    }
 }
 
 
@@ -112,10 +76,7 @@ pub struct MergeOperands {
 }
 
 impl MergeOperands {
-    fn new(operands_list: *const *const c_char,
+    fn new(operands_list: *const *const c_char, operands_list_len: *const size_t, num_operands: c_int) -> MergeOperands {
-           operands_list_len: *const size_t,
-           num_operands: c_int)
-           -> MergeOperands {
         assert!(num_operands >= 0);
         MergeOperands {
             operands_list: operands_list,
@@ -128,6 +89,7 @@ impl MergeOperands {
 
 impl<'a> Iterator for &'a mut MergeOperands {
     type Item = &'a [u8];
+
     fn next(&mut self) -> Option<&'a [u8]> {
         if self.cursor == self.num_operands {
             None
@@ -137,13 +99,11 @@ impl<'a> Iterator for &'a mut MergeOperands {
                 let base_len = self.operands_list_len as usize;
                 let spacing = mem::size_of::<*const *const u8>();
                 let spacing_len = mem::size_of::<*const size_t>();
-                let len_ptr =
+                let len_ptr = (base_len + (spacing_len * self.cursor)) as *const size_t;
-                    (base_len + (spacing_len * self.cursor)) as *const size_t;
                 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)
+                Some(mem::transmute(slice::from_raw_parts(*(ptr as *const *const u8) as *const u8, len)))
-                        as *const u8, len)))
             }
         }
     }
@@ -154,12 +114,9 @@ impl<'a> Iterator for &'a mut MergeOperands {
     }
 }
 
+#[cfg(test)]
 #[allow(unused_variables)]
-#[allow(dead_code)]
+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 {
@@ -175,12 +132,10 @@ fn test_provided_merge(new_key: &[u8],
     result
 }
 
-#[allow(dead_code)]
 #[test]
-
 fn mergetest() {
-    use rocksdb_options::Options;
+    use {Options};
-    use rocksdb::{DB, DBVector, Writable};
+    use rocksdb::{DB, Writable};
 
     let path = "_rust_rocksdb_mergetest";
     let mut opts = Options::default();
@@ -203,7 +158,7 @@ fn mergetest() {
                     None => println!("did not read valid utf-8 out of the db"),
                 }
             }
-            Err(e) => println!("error reading value"),
+            Err(_) => println!("error reading value"),
             _ => panic!("value not present"),
         }
 

src/rocksdb.rs

@@ -13,46 +13,87 @@
 // limitations under the License.
 //
 
-extern crate libc;
-
 use std::collections::BTreeMap;
-use std::ffi::CString;
+use std::ffi::{CStr, CString};
 use std::fs;
 use std::ops::Deref;
 use std::path::{Path, PathBuf};
+use std::ptr;
 use std::slice;
 use std::str::from_utf8;
 use std::fmt;
 
-use self::libc::size_t;
+use libc::{self, c_char, c_uchar, c_int, c_void, size_t};
+
+use {Options, WriteOptions};
+use ffi;
+
+fn error_message(ptr: *const i8) -> String {
+    let c_str = unsafe { CStr::from_ptr(ptr as *const _) };
+    let s = from_utf8(c_str.to_bytes()).unwrap().to_owned();
+    unsafe {
+        libc::free(ptr as *mut c_void);
+    }
+    s
+}
+
+pub fn new_bloom_filter(bits: c_int) -> *mut ffi::rocksdb_filterpolicy_t {
+    unsafe { ffi::rocksdb_filterpolicy_create_bloom(bits) }
+}
 
-use rocksdb_ffi::{self, DBCFHandle, error_message};
+pub fn new_cache(capacity: size_t) -> *mut ffi::rocksdb_cache_t {
-use rocksdb_options::{Options, WriteOptions};
+    unsafe { ffi::rocksdb_cache_create_lru(capacity) }
+}
 
 pub struct DB {
-    inner: rocksdb_ffi::DBInstance,
+    inner: *mut ffi::rocksdb_t,
-    cfs: BTreeMap<String, DBCFHandle>,
+    cfs: BTreeMap<String, *mut ffi::rocksdb_column_family_handle_t>,
     path: PathBuf,
 }
 
 unsafe impl Send for DB { }
 unsafe impl Sync for DB { }
 
+#[derive(Debug, Copy, Clone, PartialEq)]
+pub enum DBCompressionType {
+    None = 0,
+    Snappy = 1,
+    Zlib = 2,
+    Bz2 = 3,
+    Lz4 = 4,
+    Lz4hc = 5,
+}
+
+#[derive(Debug, Copy, Clone, PartialEq)]
+pub enum DBCompactionStyle {
+    Level = 0,
+    Universal = 1,
+    Fifo = 2,
+}
+
+#[derive(Debug, Copy, Clone, PartialEq)]
+pub enum DBRecoveryMode {
+    TolerateCorruptedTailRecords = 0,
+    AbsoluteConsistency = 1,
+    PointInTime = 2,
+    SkipAnyCorruptedRecords = 3,
+}
+
 pub struct WriteBatch {
-    inner: rocksdb_ffi::DBWriteBatch,
+    inner: *mut ffi::rocksdb_writebatch_t,
 }
 
 pub struct ReadOptions {
-    inner: rocksdb_ffi::DBReadOptions,
+    inner: *mut ffi::rocksdb_readoptions_t,
 }
 
 pub struct Snapshot<'a> {
     db: &'a DB,
-    inner: rocksdb_ffi::DBSnapshot,
+    inner: *const ffi::rocksdb_snapshot_t,
 }
 
 pub struct DBIterator {
-    inner: rocksdb_ffi::DBIterator,
+    inner: *mut ffi::rocksdb_iterator_t,
     direction: Direction,
     just_seeked: bool,
 }
@@ -98,34 +139,23 @@ impl Iterator for DBIterator {
         let native_iter = self.inner;
         if !self.just_seeked {
             match self.direction {
-                Direction::Forward => unsafe {
+                Direction::Forward => unsafe { ffi::rocksdb_iter_next(native_iter) },
-                    rocksdb_ffi::rocksdb_iter_next(native_iter)
+                Direction::Reverse => unsafe { ffi::rocksdb_iter_prev(native_iter) },
-                },
-                Direction::Reverse => unsafe {
-                    rocksdb_ffi::rocksdb_iter_prev(native_iter)
-                },
             }
         } else {
             self.just_seeked = false;
         }
-        if unsafe { rocksdb_ffi::rocksdb_iter_valid(native_iter) } {
+        if unsafe { ffi::rocksdb_iter_valid(native_iter) != 0 } {
             let mut key_len: size_t = 0;
             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 {
+            let key_ptr = unsafe { ffi::rocksdb_iter_key(native_iter, key_len_ptr) as *const c_uchar };
-                rocksdb_ffi::rocksdb_iter_key(native_iter, key_len_ptr)
+            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 key =
+            let val = unsafe { slice::from_raw_parts(val_ptr, val_len as usize) };
-                unsafe { slice::from_raw_parts(key_ptr, key_len as usize) };
-            let val_ptr = unsafe {
-                rocksdb_ffi::rocksdb_iter_value(native_iter, val_len_ptr)
-            };
-            let val =
-                unsafe { slice::from_raw_parts(val_ptr, val_len as usize) };
 
-            Some((key.to_vec().into_boxed_slice(),
+            Some((key.to_vec().into_boxed_slice(), val.to_vec().into_boxed_slice()))
-                  val.to_vec().into_boxed_slice()))
         } else {
             None
         }
@@ -138,21 +168,17 @@ pub enum IteratorMode<'a> {
     From(&'a [u8], Direction),
 }
 
-
 impl DBIterator {
     fn new(db: &DB, readopts: &ReadOptions, mode: IteratorMode) -> DBIterator {
         unsafe {
-            let iterator = rocksdb_ffi::rocksdb_create_iterator(db.inner,
+            let iterator = ffi::rocksdb_create_iterator(db.inner, readopts.inner);
-                                                                readopts.inner);
 
             let mut rv = DBIterator {
                 inner: iterator,
                 direction: Direction::Forward, // blown away by set_mode()
                 just_seeked: false,
             };
-
             rv.set_mode(mode);
-
             rv
         }
     }
@@ -161,17 +187,15 @@ impl DBIterator {
         unsafe {
             match mode {
                 IteratorMode::Start => {
-                    rocksdb_ffi::rocksdb_iter_seek_to_first(self.inner);
+                    ffi::rocksdb_iter_seek_to_first(self.inner);
                     self.direction = Direction::Forward;
                 }
                 IteratorMode::End => {
-                    rocksdb_ffi::rocksdb_iter_seek_to_last(self.inner);
+                    ffi::rocksdb_iter_seek_to_last(self.inner);
                     self.direction = Direction::Reverse;
                 }
                 IteratorMode::From(key, dir) => {
-                    rocksdb_ffi::rocksdb_iter_seek(self.inner,
+                    ffi::rocksdb_iter_seek(self.inner, key.as_ptr() as *const c_char, key.len() as size_t);
-                                                   key.as_ptr(),
-                                                   key.len() as size_t);
                     self.direction = dir;
                 }
             };
@@ -180,28 +204,19 @@ impl DBIterator {
     }
 
     pub fn valid(&self) -> bool {
-        unsafe { rocksdb_ffi::rocksdb_iter_valid(self.inner) }
+        unsafe { ffi::rocksdb_iter_valid(self.inner) != 0 }
     }
 
-    fn new_cf(db: &DB,
+    fn new_cf(db: &DB, cf_handle: *mut ffi::rocksdb_column_family_handle_t, readopts: &ReadOptions, mode: IteratorMode) -> Result<DBIterator, Error> {
-              cf_handle: DBCFHandle,
-              readopts: &ReadOptions,
-              mode: IteratorMode)
-              -> Result<DBIterator, Error> {
         unsafe {
-            let iterator =
+            let iterator = ffi::rocksdb_create_iterator_cf(db.inner, readopts.inner, cf_handle);
-                rocksdb_ffi::rocksdb_create_iterator_cf(db.inner,
-                                                        readopts.inner,
-                                                        cf_handle);
 
             let mut rv = DBIterator {
                 inner: iterator,
                 direction: Direction::Forward, // blown away by set_mode()
                 just_seeked: false,
             };
-
             rv.set_mode(mode);
-
             Ok(rv)
         }
     }
@@ -210,15 +225,14 @@ impl DBIterator {
 impl Drop for DBIterator {
     fn drop(&mut self) {
         unsafe {
-            rocksdb_ffi::rocksdb_iter_destroy(self.inner);
+            ffi::rocksdb_iter_destroy(self.inner);
         }
     }
 }
 
 impl<'a> Snapshot<'a> {
     pub fn new(db: &DB) -> Snapshot {
-        let snapshot =
+        let snapshot = unsafe { ffi::rocksdb_create_snapshot(db.inner) };
-            unsafe { rocksdb_ffi::rocksdb_create_snapshot(db.inner) };
         Snapshot {
             db: db,
             inner: snapshot,
@@ -231,26 +245,19 @@ impl<'a> Snapshot<'a> {
         DBIterator::new(self.db, &readopts, mode)
     }
 
-    pub fn iterator_cf(&self,
+    pub fn iterator_cf(&self, cf_handle: *mut ffi::rocksdb_column_family_handle_t, mode: IteratorMode) -> Result<DBIterator, Error> {
-                       cf_handle: DBCFHandle,
-                       mode: IteratorMode)
-                       -> Result<DBIterator, Error> {
         let mut readopts = ReadOptions::default();
         readopts.set_snapshot(self);
         DBIterator::new_cf(self.db, cf_handle, &readopts, mode)
     }
 
-
     pub fn get(&self, key: &[u8]) -> Result<Option<DBVector>, Error> {
         let mut readopts = ReadOptions::default();
         readopts.set_snapshot(self);
         self.db.get_opt(key, &readopts)
     }
 
-    pub fn get_cf(&self,
+    pub fn get_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8]) -> Result<Option<DBVector>, Error> {
-                  cf: DBCFHandle,
-                  key: &[u8])
-                  -> Result<Option<DBVector>, Error> {
         let mut readopts = ReadOptions::default();
         readopts.set_snapshot(self);
         self.db.get_cf_opt(cf, key, &readopts)
@@ -260,31 +267,23 @@ impl<'a> Snapshot<'a> {
 impl<'a> Drop for Snapshot<'a> {
     fn drop(&mut self) {
         unsafe {
-            rocksdb_ffi::rocksdb_release_snapshot(self.db.inner, self.inner);
+            ffi::rocksdb_release_snapshot(self.db.inner, self.inner);
         }
     }
 }
 
-// This is for the DB and write batches to share the same API
+// 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,
+    fn put_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8]) -> Result<(), Error>;
-              cf: DBCFHandle,
-              key: &[u8],
-              value: &[u8])
-              -> Result<(), Error>;
     fn merge(&self, key: &[u8], value: &[u8]) -> Result<(), Error>;
-    fn merge_cf(&self,
+    fn merge_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8]) -> Result<(), Error>;
-                cf: DBCFHandle,
-                key: &[u8],
-                value: &[u8])
-                -> Result<(), Error>;
     fn delete(&self, key: &[u8]) -> Result<(), Error>;
-    fn delete_cf(&self, cf: DBCFHandle, key: &[u8]) -> Result<(), Error>;
+    fn delete_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8]) -> Result<(), Error>;
 }
 
 impl DB {
-    /// Open a database with default options
+    /// Open a database with default options.
     pub fn open_default<P: AsRef<Path>>(path: P) -> Result<DB, Error> {
         let mut opts = Options::default();
         opts.create_if_missing(true);
@@ -303,82 +302,54 @@ impl DB {
     /// # Panics
     ///
     /// * Panics if the column family doesn't exist
-    pub fn open_cf<P: AsRef<Path>>(opts: &Options,
+    pub fn open_cf<P: AsRef<Path>>(opts: &Options, path: P, cfs: &[&str]) -> Result<DB, Error> {
-                   path: P,
-                   cfs: &[&str])
-                   -> Result<DB, Error> {
         let path = path.as_ref();
 
         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 \
+                return Err(Error::new("Failed to convert path to CString when opening rocksdb".to_owned()))
-                                       when opening rocksdb"
-                    .to_string()))
             }
         };
         let cpath_ptr = cpath.as_ptr();
 
         if let Err(e) = fs::create_dir_all(&path) {
-            return Err(Error::new(format!("Failed to create rocksdb \
+            return Err(Error::new(format!("Failed to create rocksdb directory: {:?}", e)));
-                                           directory: {:?}",
-                                          e)));
         }
 
-        let mut err: *const i8 = 0 as *const i8;
+        let mut err: *mut c_char = ptr::null_mut();
-        let err_ptr: *mut *const i8 = &mut err;
+        let db: *mut ffi::rocksdb_t;
-        let db: rocksdb_ffi::DBInstance;
         let mut cf_map = BTreeMap::new();
 
         if cfs.len() == 0 {
             unsafe {
-                db = rocksdb_ffi::rocksdb_open(opts.inner,
+                db = ffi::rocksdb_open(opts.inner, cpath_ptr as *const _, &mut err);
-                                               cpath_ptr as *const _,
-                                               err_ptr);
             }
         } else {
             let mut cfs_v = cfs.to_vec();
-            // Always open the default column family
+            // Always open the default column family.
             if !cfs_v.contains(&"default") {
                 cfs_v.push("default");
             }
 
-            // We need to store our CStrings in an intermediate vector
+            // We need to store our CStrings in an intermediate vector so that their pointers remain valid.
-            // so that their pointers remain valid.
+            let c_cfs: Vec<CString> = cfs_v.iter().map(|cf| CString::new(cf.as_bytes()).unwrap()).collect();
-            let c_cfs: Vec<CString> = cfs_v.iter()
-                .map(|cf| CString::new(cf.as_bytes()).unwrap())
-                .collect();
 
-            let cfnames: Vec<*const _> = c_cfs.iter()
+            let cfnames: Vec<_> = c_cfs.iter().map(|cf| cf.as_ptr()).collect();
-                .map(|cf| cf.as_ptr())
-                .collect();
 
             // These handles will be populated by DB.
-            let cfhandles: Vec<rocksdb_ffi::DBCFHandle> = cfs_v.iter()
+            let mut cfhandles: Vec<_> = cfs_v.iter().map(|_| ptr::null_mut()).collect();
-                .map(|_| 0 as rocksdb_ffi::DBCFHandle)
-                .collect();
 
             // TODO(tyler) allow options to be passed in.
-            let cfopts: Vec<rocksdb_ffi::DBOptions> = cfs_v.iter()
+            let cfopts: Vec<_> = cfs_v.iter().map(|_| unsafe { ffi::rocksdb_options_create() as *const _ }).collect();
-                .map(|_| unsafe { rocksdb_ffi::rocksdb_options_create() })
+
-                .collect();
-
-            // Prepare to ship to C.
-            let copts: *const rocksdb_ffi::DBOptions = cfopts.as_ptr();
-            let handles: *const rocksdb_ffi::DBCFHandle = cfhandles.as_ptr();
-            let nfam = cfs_v.len();
             unsafe {
-                db = rocksdb_ffi::rocksdb_open_column_families(opts.inner, cpath_ptr as *const _,
+                db = 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(), &mut err);
-                                                               nfam as libc::c_int,
-                                                               cfnames.as_ptr() as *const _,
-                                                               copts, handles, err_ptr);
             }
 
             for handle in &cfhandles {
                 if handle.is_null() {
-                    return Err(Error::new("Received null column family \
+                    return Err(Error::new("Received null column family handle from DB.".to_owned()));
-                                           handle from DB."
-                        .to_string()));
                 }
             }
 
@@ -391,8 +362,7 @@ impl DB {
             return Err(Error::new(error_message(err)));
         }
         if db.is_null() {
-            return Err(Error::new("Could not initialize database."
+            return Err(Error::new("Could not initialize database.".to_owned()));
-                .to_string()));
         }
 
         Ok(DB {
@@ -404,14 +374,9 @@ impl DB {
 
     pub fn destroy<P: AsRef<Path>>(opts: &Options, path: P) -> Result<(), Error> {
         let cpath = CString::new(path.as_ref().to_string_lossy().as_bytes()).unwrap();
-        let cpath_ptr = cpath.as_ptr();
+        let mut err: *mut c_char = ptr::null_mut();
-
-        let mut err: *const i8 = 0 as *const i8;
-        let err_ptr: *mut *const i8 = &mut err;
         unsafe {
-            rocksdb_ffi::rocksdb_destroy_db(opts.inner,
+            ffi::rocksdb_destroy_db(opts.inner, cpath.as_ptr(), &mut err);
-                                            cpath_ptr as *const _,
-                                            err_ptr);
         }
         if !err.is_null() {
             return Err(Error::new(error_message(err)));
@@ -421,14 +386,9 @@ impl DB {
 
     pub fn repair<P: AsRef<Path>>(opts: Options, path: P) -> Result<(), Error> {
         let cpath = CString::new(path.as_ref().to_string_lossy().as_bytes()).unwrap();
-        let cpath_ptr = cpath.as_ptr();
+        let mut err: *mut c_char = ptr::null_mut();
-
-        let mut err: *const i8 = 0 as *const i8;
-        let err_ptr: *mut *const i8 = &mut err;
         unsafe {
-            rocksdb_ffi::rocksdb_repair_db(opts.inner,
+            ffi::rocksdb_repair_db(opts.inner, cpath.as_ptr(), &mut err);
-                                           cpath_ptr as *const _,
-                                           err_ptr);
         }
         if !err.is_null() {
             return Err(Error::new(error_message(err)));
@@ -440,17 +400,10 @@ impl DB {
         &self.path.as_path()
     }
 
-    pub fn write_opt(&self,
+    pub fn write_opt(&self, batch: WriteBatch, writeopts: &WriteOptions) -> Result<(), Error> {
-                     batch: WriteBatch,
+        let mut err: *mut c_char = ptr::null_mut();
-                     writeopts: &WriteOptions)
-                     -> Result<(), Error> {
-        let mut err: *const i8 = 0 as *const i8;
-        let err_ptr: *mut *const i8 = &mut err;
         unsafe {
-            rocksdb_ffi::rocksdb_write(self.inner,
+            ffi::rocksdb_write(self.inner, writeopts.inner, batch.inner, &mut err);
-                                       writeopts.inner,
-                                       batch.inner,
-                                       err_ptr);
         }
         if !err.is_null() {
             return Err(Error::new(error_message(err)));
@@ -468,31 +421,15 @@ impl DB {
         self.write_opt(batch, &wo)
     }
 
-    pub fn get_opt(&self,
+    pub fn get_opt(&self, key: &[u8], readopts: &ReadOptions) -> Result<Option<DBVector>, Error> {
-                   key: &[u8],
-                   readopts: &ReadOptions)
-                   -> Result<Option<DBVector>, Error> {
         if readopts.inner.is_null() {
-            return Err(Error::new("Unable to create rocksdb read options.  \
+            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()));
-                                   This is a fairly trivial call, and its \
-                                   failure may be indicative of a \
-                                   mis-compiled or mis-loaded rocksdb \
-                                   library."
-                .to_string()));
         }
 
         unsafe {
-            let val_len: size_t = 0;
+            let mut val_len: size_t = 0;
-            let val_len_ptr = &val_len as *const size_t;
+            let mut err: *mut c_char = ptr::null_mut();
-            let mut err: *const i8 = 0 as *const i8;
+            let val = ffi::rocksdb_get(self.inner, readopts.inner, key.as_ptr() as *const c_char, key.len() as size_t, &mut val_len, &mut err) as *mut u8;
-            let err_ptr: *mut *const i8 = &mut err;
-            let val =
-                rocksdb_ffi::rocksdb_get(self.inner,
-                                         readopts.inner,
-                                         key.as_ptr(),
-                                         key.len() as size_t,
-                                         val_len_ptr,
-                                         err_ptr) as *mut u8;
             if !err.is_null() {
                 return Err(Error::new(error_message(err)));
             }
@@ -509,33 +446,15 @@ impl DB {
         self.get_opt(key, &ReadOptions::default())
     }
 
-    pub fn get_cf_opt(&self,
+    pub fn get_cf_opt(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], readopts: &ReadOptions) -> Result<Option<DBVector>, Error> {
-                      cf: DBCFHandle,
-                      key: &[u8],
-                      readopts: &ReadOptions)
-                      -> Result<Option<DBVector>, Error> {
         if readopts.inner.is_null() {
-            return Err(Error::new("Unable to create rocksdb read options.  \
+            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()));
-                                   This is a fairly trivial call, and its \
-                                   failure may be indicative of a \
-                                   mis-compiled or mis-loaded rocksdb \
-                                   library."
-                .to_string()));
         }
 
         unsafe {
-            let val_len: size_t = 0;
+            let mut val_len: size_t = 0;
-            let val_len_ptr = &val_len as *const size_t;
+            let mut err: *mut c_char = ptr::null_mut();
-            let mut err: *const i8 = 0 as *const i8;
+            let val = ffi::rocksdb_get_cf(self.inner, readopts.inner, cf, key.as_ptr() as *const c_char, key.len() as size_t, &mut val_len, &mut err) as *mut u8;
-            let err_ptr: *mut *const i8 = &mut err;
-            let val =
-                rocksdb_ffi::rocksdb_get_cf(self.inner,
-                                            readopts.inner,
-                                            cf,
-                                            key.as_ptr(),
-                                            key.len() as size_t,
-                                            val_len_ptr,
-                                            err_ptr) as *mut u8;
             if !err.is_null() {
                 return Err(Error::new(error_message(err)));
             }
@@ -547,34 +466,20 @@ impl DB {
         }
     }
 
-    pub fn get_cf(&self,
+    pub fn get_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8]) -> Result<Option<DBVector>, Error> {
-                  cf: DBCFHandle,
-                  key: &[u8])
-                  -> Result<Option<DBVector>, Error> {
         self.get_cf_opt(cf, key, &ReadOptions::default())
     }
 
-    pub fn create_cf(&mut self,
+    pub fn create_cf(&mut self, name: &str, opts: &Options) -> Result<*mut ffi::rocksdb_column_family_handle_t, Error> {
-                     name: &str,
-                     opts: &Options)
-                     -> Result<DBCFHandle, Error> {
         let cname = match CString::new(name.as_bytes()) {
             Ok(c) => c,
             Err(_) => {
-                return Err(Error::new("Failed to convert path to CString \
+                return Err(Error::new("Failed to convert path to CString when opening rocksdb".to_owned()))
-                                       when opening rocksdb"
-                    .to_string()))
             }
         };
-        let cname_ptr = cname.as_ptr();
+        let mut err: *mut c_char = ptr::null_mut();
-        let mut err: *const i8 = 0 as *const i8;
-        let err_ptr: *mut *const i8 = &mut err;
         let cf_handler = unsafe {
-            let cf_handler =
+            let cf_handler = ffi::rocksdb_create_column_family(self.inner, opts.inner, cname.as_ptr(), &mut err);
-                rocksdb_ffi::rocksdb_create_column_family(self.inner,
-                                                          opts.inner,
-                                                          cname_ptr as *const _,
-                                                          err_ptr);
             self.cfs.insert(name.to_string(), cf_handler);
             cf_handler
         };
@@ -587,26 +492,20 @@ impl DB {
     pub fn drop_cf(&mut self, name: &str) -> Result<(), Error> {
         let cf = self.cfs.get(name);
         if cf.is_none() {
-            return Err(Error::new(format!("Invalid column family: {}", name)
+            return Err(Error::new(format!("Invalid column family: {}", name).to_owned()));
-                .to_string()));
         }
-
+        let mut err: *mut c_char = ptr::null_mut();
-        let mut err: *const i8 = 0 as *const i8;
-        let err_ptr: *mut *const i8 = &mut err;
         unsafe {
-            rocksdb_ffi::rocksdb_drop_column_family(self.inner,
+            ffi::rocksdb_drop_column_family(self.inner, *cf.unwrap(), &mut err);
-                                                    *cf.unwrap(),
-                                                    err_ptr);
         }
         if !err.is_null() {
             return Err(Error::new(error_message(err)));
         }
-
         Ok(())
     }
 
-    /// Return the underlying column family handle
+    /// Return the underlying column family handle.
-    pub fn cf_handle(&self, name: &str) -> Option<&DBCFHandle> {
+    pub fn cf_handle(&self, name: &str) -> Option<&*mut ffi::rocksdb_column_family_handle_t> {
         self.cfs.get(name)
     }
 
@@ -615,10 +514,7 @@ impl DB {
         DBIterator::new(self, &opts, mode)
     }
 
-    pub fn iterator_cf(&self,
+    pub fn iterator_cf(&self, cf_handle: *mut ffi::rocksdb_column_family_handle_t, mode: IteratorMode) -> Result<DBIterator, Error> {
-                       cf_handle: DBCFHandle,
-                       mode: IteratorMode)
-                       -> Result<DBIterator, Error> {
         let opts = ReadOptions::default();
         DBIterator::new_cf(self, cf_handle, &opts, mode)
     }
@@ -627,21 +523,10 @@ impl DB {
         Snapshot::new(self)
     }
 
-    pub fn put_opt(&self,
+    pub fn put_opt(&self, key: &[u8], value: &[u8], writeopts: &WriteOptions) -> Result<(), Error> {
-                   key: &[u8],
-                   value: &[u8],
-                   writeopts: &WriteOptions)
-                   -> Result<(), Error> {
         unsafe {
-            let mut err: *const i8 = 0 as *const i8;
+            let mut err: *mut c_char = ptr::null_mut();
-            let err_ptr: *mut *const i8 = &mut err;
+            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, &mut err);
-            rocksdb_ffi::rocksdb_put(self.inner,
-                                     writeopts.inner,
-                                     key.as_ptr(),
-                                     key.len() as size_t,
-                                     value.as_ptr(),
-                                     value.len() as size_t,
-                                     err_ptr);
             if !err.is_null() {
                 return Err(Error::new(error_message(err)));
             }
@@ -649,105 +534,54 @@ impl DB {
         }
     }
 
-    pub fn put_cf_opt(&self,
+    pub fn put_cf_opt(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8], writeopts: &WriteOptions) -> Result<(), Error> {
-                      cf: DBCFHandle,
-                      key: &[u8],
-                      value: &[u8],
-                      writeopts: &WriteOptions)
-                      -> Result<(), Error> {
         unsafe {
-            let mut err: *const i8 = 0 as *const i8;
+            let mut err: *mut c_char = ptr::null_mut();
-            let err_ptr: *mut *const i8 = &mut err;
+            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, &mut err);
-            rocksdb_ffi::rocksdb_put_cf(self.inner,
-                                        writeopts.inner,
-                                        cf,
-                                        key.as_ptr(),
-                                        key.len() as size_t,
-                                        value.as_ptr(),
-                                        value.len() as size_t,
-                                        err_ptr);
             if !err.is_null() {
                 return Err(Error::new(error_message(err)));
             }
             Ok(())
         }
     }
-    pub fn merge_opt(&self,
+
-                     key: &[u8],
+    pub fn merge_opt(&self, key: &[u8], value: &[u8], writeopts: &WriteOptions) -> Result<(), Error> {
-                     value: &[u8],
-                     writeopts: &WriteOptions)
-                     -> Result<(), Error> {
         unsafe {
-            let mut err: *const i8 = 0 as *const i8;
+            let mut err: *mut c_char = ptr::null_mut();
-            let err_ptr: *mut *const i8 = &mut err;
+            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, &mut err);
-            rocksdb_ffi::rocksdb_merge(self.inner,
-                                       writeopts.inner,
-                                       key.as_ptr(),
-                                       key.len() as size_t,
-                                       value.as_ptr(),
-                                       value.len() as size_t,
-                                       err_ptr);
             if !err.is_null() {
                 return Err(Error::new(error_message(err)));
             }
             Ok(())
         }
     }
-    fn merge_cf_opt(&self,
+
-                    cf: DBCFHandle,
+    fn merge_cf_opt(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8], writeopts: &WriteOptions) -> Result<(), Error> {
-                    key: &[u8],
-                    value: &[u8],
-                    writeopts: &WriteOptions)
-                    -> Result<(), Error> {
         unsafe {
-            let mut err: *const i8 = 0 as *const i8;
+            let mut err: *mut c_char = ptr::null_mut();
-            let err_ptr: *mut *const i8 = &mut err;
+            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, &mut err);
-            rocksdb_ffi::rocksdb_merge_cf(self.inner,
-                                          writeopts.inner,
-                                          cf,
-                                          key.as_ptr(),
-                                          key.len() as size_t,
-                                          value.as_ptr(),
-                                          value.len() as size_t,
-                                          err_ptr);
             if !err.is_null() {
                 return Err(Error::new(error_message(err)));
             }
             Ok(())
         }
     }
-    fn delete_opt(&self,
+
-                  key: &[u8],
+    fn delete_opt(&self, key: &[u8], writeopts: &WriteOptions) -> Result<(), Error> {
-                  writeopts: &WriteOptions)
-                  -> Result<(), Error> {
         unsafe {
-            let mut err: *const i8 = 0 as *const i8;
+            let mut err: *mut c_char = ptr::null_mut();
-            let err_ptr: *mut *const i8 = &mut err;
+            ffi::rocksdb_delete(self.inner, writeopts.inner, key.as_ptr() as *const c_char, key.len() as size_t, &mut err);
-            rocksdb_ffi::rocksdb_delete(self.inner,
-                                        writeopts.inner,
-                                        key.as_ptr(),
-                                        key.len() as size_t,
-                                        err_ptr);
             if !err.is_null() {
                 return Err(Error::new(error_message(err)));
             }
             Ok(())
         }
     }
-    fn delete_cf_opt(&self,
+
-                     cf: DBCFHandle,
+    fn delete_cf_opt(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], writeopts: &WriteOptions) -> Result<(), Error> {
-                     key: &[u8],
-                     writeopts: &WriteOptions)
-                     -> Result<(), Error> {
         unsafe {
-            let mut err: *const i8 = 0 as *const i8;
+            let mut err: *mut c_char = ptr::null_mut();
-            let err_ptr: *mut *const i8 = &mut err;
+            ffi::rocksdb_delete_cf(self.inner, writeopts.inner, cf, key.as_ptr() as *const c_char, key.len() as size_t, &mut err);
-            rocksdb_ffi::rocksdb_delete_cf(self.inner,
-                                           writeopts.inner,
-                                           cf,
-                                           key.as_ptr(),
-                                           key.len() as size_t,
-                                           err_ptr);
             if !err.is_null() {
                 return Err(Error::new(error_message(err)));
             }
@@ -761,11 +595,7 @@ impl Writable for DB {
         self.put_opt(key, value, &WriteOptions::default())
     }
 
-    fn put_cf(&self,
+    fn put_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8]) -> Result<(), Error> {
-              cf: DBCFHandle,
-              key: &[u8],
-              value: &[u8])
-              -> Result<(), Error> {
         self.put_cf_opt(cf, key, value, &WriteOptions::default())
     }
 
@@ -773,11 +603,7 @@ impl Writable for DB {
         self.merge_opt(key, value, &WriteOptions::default())
     }
 
-    fn merge_cf(&self,
+    fn merge_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8]) -> Result<(), Error> {
-                cf: DBCFHandle,
-                key: &[u8],
-                value: &[u8])
-                -> Result<(), Error> {
         self.merge_cf_opt(cf, key, value, &WriteOptions::default())
     }
 
@@ -785,14 +611,14 @@ impl Writable for DB {
         self.delete_opt(key, &WriteOptions::default())
     }
 
-    fn delete_cf(&self, cf: DBCFHandle, 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())
     }
 }
 
 impl WriteBatch {
     pub fn len(&self) -> usize {
-        unsafe { rocksdb_ffi::rocksdb_writebatch_count(self.inner) as usize }
+        unsafe { ffi::rocksdb_writebatch_count(self.inner) as usize }
     }
 
     pub fn is_empty(&self) -> bool {
@@ -803,14 +629,14 @@ impl WriteBatch {
 impl Default for WriteBatch {
     fn default() -> WriteBatch {
         WriteBatch {
-            inner: unsafe { rocksdb_ffi::rocksdb_writebatch_create() },
+            inner: unsafe { ffi::rocksdb_writebatch_create() },
         }
     }
 }
 
 impl Drop for WriteBatch {
     fn drop(&mut self) {
-        unsafe { rocksdb_ffi::rocksdb_writebatch_destroy(self.inner) }
+        unsafe { ffi::rocksdb_writebatch_destroy(self.inner) }
     }
 }
 
@@ -818,9 +644,9 @@ impl Drop for DB {
     fn drop(&mut self) {
         unsafe {
             for cf in self.cfs.values() {
-                rocksdb_ffi::rocksdb_column_family_handle_destroy(*cf);
+                ffi::rocksdb_column_family_handle_destroy(*cf);
             }
-            rocksdb_ffi::rocksdb_close(self.inner);
+            ffi::rocksdb_close(self.inner);
         }
     }
 }
@@ -832,79 +658,48 @@ impl fmt::Debug for DB {
 }
 
 impl Writable for WriteBatch {
-    /// Insert a value into the database under the given key
+    /// Insert a value into the database under the given key.
     fn put(&self, key: &[u8], value: &[u8]) -> Result<(), Error> {
         unsafe {
-            rocksdb_ffi::rocksdb_writebatch_put(self.inner,
+            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);
-                                                key.as_ptr(),
-                                                key.len() as size_t,
-                                                value.as_ptr(),
-                                                value.len() as size_t);
             Ok(())
         }
     }
 
-    fn put_cf(&self,
+    fn put_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8]) -> Result<(), Error> {
-              cf: DBCFHandle,
-              key: &[u8],
-              value: &[u8])
-              -> Result<(), Error> {
         unsafe {
-            rocksdb_ffi::rocksdb_writebatch_put_cf(self.inner,
+            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);
-                                                   cf,
-                                                   key.as_ptr(),
-                                                   key.len() as size_t,
-                                                   value.as_ptr(),
-                                                   value.len() as size_t);
             Ok(())
         }
     }
 
     fn merge(&self, key: &[u8], value: &[u8]) -> Result<(), Error> {
         unsafe {
-            rocksdb_ffi::rocksdb_writebatch_merge(self.inner,
+            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);
-                                                  key.as_ptr(),
-                                                  key.len() as size_t,
-                                                  value.as_ptr(),
-                                                  value.len() as size_t);
             Ok(())
         }
     }
 
-    fn merge_cf(&self,
+    fn merge_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8], value: &[u8]) -> Result<(), Error> {
-                cf: DBCFHandle,
-                key: &[u8],
-                value: &[u8])
-                -> Result<(), Error> {
         unsafe {
-            rocksdb_ffi::rocksdb_writebatch_merge_cf(self.inner,
+            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);
-                                                     cf,
-                                                     key.as_ptr(),
-                                                     key.len() as size_t,
-                                                     value.as_ptr(),
-                                                     value.len() as size_t);
             Ok(())
         }
     }
 
-    /// Remove the database entry for key
+    /// Remove the database entry for key.
     ///
     /// Returns Err if the key was not found
     fn delete(&self, key: &[u8]) -> Result<(), Error> {
         unsafe {
-            rocksdb_ffi::rocksdb_writebatch_delete(self.inner,
+            ffi::rocksdb_writebatch_delete(self.inner, key.as_ptr() as *const i8, key.len() as size_t);
-                                                   key.as_ptr(),
-                                                   key.len() as size_t);
             Ok(())
         }
     }
 
-    fn delete_cf(&self, cf: DBCFHandle, key: &[u8]) -> Result<(), Error> {
+    fn delete_cf(&self, cf: *mut ffi::rocksdb_column_family_handle_t, key: &[u8]) -> Result<(), Error> {
         unsafe {
-            rocksdb_ffi::rocksdb_writebatch_delete_cf(self.inner,
+            ffi::rocksdb_writebatch_delete_cf(self.inner, cf, key.as_ptr() as *const i8, key.len() as size_t);
-                                                      cf,
-                                                      key.as_ptr(),
-                                                      key.len() as size_t);
             Ok(())
         }
     }
@@ -912,7 +707,7 @@ impl Writable for WriteBatch {
 
 impl Drop for ReadOptions {
     fn drop(&mut self) {
-        unsafe { rocksdb_ffi::rocksdb_readoptions_destroy(self.inner) }
+        unsafe { ffi::rocksdb_readoptions_destroy(self.inner) }
     }
 }
 
@@ -923,22 +718,19 @@ impl ReadOptions {
     #[allow(dead_code)]
     fn fill_cache(&mut self, v: bool) {
         unsafe {
-            rocksdb_ffi::rocksdb_readoptions_set_fill_cache(self.inner, v);
+            ffi::rocksdb_readoptions_set_fill_cache(self.inner, v as c_uchar);
         }
     }
 
     fn set_snapshot(&mut self, snapshot: &Snapshot) {
         unsafe {
-            rocksdb_ffi::rocksdb_readoptions_set_snapshot(self.inner,
+            ffi::rocksdb_readoptions_set_snapshot(self.inner, snapshot.inner);
-                                                          snapshot.inner);
         }
     }
 
     pub fn set_iterate_upper_bound(&mut self, key: &[u8]) {
         unsafe {
-            rocksdb_ffi::rocksdb_readoptions_set_iterate_upper_bound(self.inner,
+            ffi::rocksdb_readoptions_set_iterate_upper_bound(self.inner, key.as_ptr() as *const i8, key.len() as size_t);
-                                                                     key.as_ptr(),
-                                                                     key.len() as size_t);
         }
     }
 }
@@ -946,7 +738,7 @@ impl ReadOptions {
 impl Default for ReadOptions {
     fn default() -> ReadOptions {
         unsafe {
-            ReadOptions { inner: rocksdb_ffi::rocksdb_readoptions_create() }
+            ReadOptions { inner: ffi::rocksdb_readoptions_create() }
         }
     }
 }
@@ -959,6 +751,7 @@ pub struct DBVector {
 
 impl Deref for DBVector {
     type Target = [u8];
+
     fn deref(&self) -> &[u8] {
         unsafe { slice::from_raw_parts(self.base, self.len) }
     }
@@ -967,7 +760,7 @@ impl Deref for DBVector {
 impl Drop for DBVector {
     fn drop(&mut self) {
         unsafe {
-            libc::free(self.base as *mut libc::c_void);
+            libc::free(self.base as *mut c_void);
         }
     }
 }
@@ -1010,10 +803,7 @@ fn errors_do_stuff() {
     // The DB will still be open when we try to destroy and the lock should fail
     match DB::destroy(&opts, path) {
         Err(s) => {
-            assert!(s ==
+            assert!(s == Error::new("IO error: lock _rust_rocksdb_error/LOCK: No locks available".to_owned()))
-                    Error::new("IO error: lock _rust_rocksdb_error/LOCK: No \
-                                locks available"
-                .to_string()))
         }
         Ok(_) => panic!("should fail"),
     }
@@ -1067,9 +857,7 @@ fn iterator_test() {
         assert!(p.is_ok());
         let iter = db.iterator(IteratorMode::Start);
         for (k, v) in iter {
-            println!("Hello {}: {}",
+            println!("Hello {}: {}", from_utf8(&*k).unwrap(), from_utf8(&*v).unwrap());
-                     from_utf8(&*k).unwrap(),
-                     from_utf8(&*v).unwrap());
         }
     }
     let opts = Options::default();

src/rocksdb_options.rs

@@ -12,32 +12,22 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
-extern crate libc;
+
-use self::libc::{c_int, size_t, c_void};
 use std::ffi::{CStr, CString};
 use std::mem;
 
-use rocksdb_ffi::{self, DBCompressionType, DBRecoveryMode};
+use libc::{self, c_int, c_uint, c_uchar, c_void, size_t, uint64_t};
-use merge_operator::{self, MergeFn, MergeOperatorCallback,
-                     full_merge_callback, partial_merge_callback};
-use comparator::{self, ComparatorCallback, compare_callback};
 
-pub struct BlockBasedOptions {
+use {Options, WriteOptions, BlockBasedOptions};
-    inner: rocksdb_ffi::DBBlockBasedTableOptions,
+use comparator::{self, ComparatorCallback};
-}
+use ffi;
-
+use merge_operator::{self, MergeFn, MergeOperatorCallback, full_merge_callback, partial_merge_callback};
-pub struct Options {
+use rocksdb::{DBCompressionType, DBCompactionStyle, DBRecoveryMode, new_cache};
-    pub inner: rocksdb_ffi::DBOptions,
-}
-
-pub struct WriteOptions {
-    pub inner: rocksdb_ffi::DBWriteOptions,
-}
 
 impl Drop for Options {
     fn drop(&mut self) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_destroy(self.inner);
+            ffi::rocksdb_options_destroy(self.inner);
         }
     }
 }
@@ -45,7 +35,7 @@ impl Drop for Options {
 impl Drop for BlockBasedOptions {
     fn drop(&mut self) {
         unsafe {
-            rocksdb_ffi::rocksdb_block_based_options_destroy(self.inner);
+            ffi::rocksdb_block_based_options_destroy(self.inner);
         }
     }
 }
@@ -53,7 +43,7 @@ impl Drop for BlockBasedOptions {
 impl Drop for WriteOptions {
     fn drop(&mut self) {
         unsafe {
-            rocksdb_ffi::rocksdb_writeoptions_destroy(self.inner);
+            ffi::rocksdb_writeoptions_destroy(self.inner);
         }
     }
 }
@@ -61,37 +51,33 @@ impl Drop for WriteOptions {
 impl BlockBasedOptions {
     pub fn set_block_size(&mut self, size: usize) {
         unsafe {
-            rocksdb_ffi::rocksdb_block_based_options_set_block_size(self.inner,
+            ffi::rocksdb_block_based_options_set_block_size(self.inner, size);
-                                                                    size);
         }
     }
 
     pub fn set_lru_cache(&mut self, size: size_t) {
-        let cache = rocksdb_ffi::new_cache(size);
+        let cache = new_cache(size);
         unsafe {
-            // because cache is wrapped in shared_ptr, so we don't need to call
+            // Since cache is wrapped in shared_ptr, we don't need to call rocksdb_cache_destroy explicitly.
-            // rocksdb_cache_destroy explicitly.
+            ffi::rocksdb_block_based_options_set_block_cache(self.inner, cache);
-            rocksdb_ffi::rocksdb_block_based_options_set_block_cache(self.inner, cache);
         }
     }
 
     pub fn set_bloom_filter(&mut self, bits_per_key: c_int, block_based: bool) {
         unsafe {
             let bloom = if block_based {
-                rocksdb_ffi::rocksdb_filterpolicy_create_bloom(bits_per_key)
+                ffi::rocksdb_filterpolicy_create_bloom(bits_per_key)
             } else {
-                rocksdb_ffi::rocksdb_filterpolicy_create_bloom_full(bits_per_key)
+                ffi::rocksdb_filterpolicy_create_bloom_full(bits_per_key)
             };
 
-            rocksdb_ffi::rocksdb_block_based_options_set_filter_policy(self.inner,
+            ffi::rocksdb_block_based_options_set_filter_policy(self.inner, bloom);
-                                                                       bloom);
         }
     }
 
     pub fn set_cache_index_and_filter_blocks(&mut self, v: bool) {
         unsafe {
-            rocksdb_ffi::rocksdb_block_based_options_set_cache_index_and_filter_blocks(self.inner,
+            ffi::rocksdb_block_based_options_set_cache_index_and_filter_blocks(self.inner, v as u8);
-                                                                                       v as u8);
         }
     }
 }
@@ -99,10 +85,10 @@ impl BlockBasedOptions {
 impl Default for BlockBasedOptions {
     fn default() -> BlockBasedOptions {
         let block_opts = unsafe {
-            rocksdb_ffi::rocksdb_block_based_options_create()
+            ffi::rocksdb_block_based_options_create()
         };
         if block_opts.is_null() {
-            panic!("Could not create rocksdb block based options".to_string());
+            panic!("Could not create rocksdb block based options".to_owned());
         }
         BlockBasedOptions { inner: block_opts }
     }
@@ -125,16 +111,13 @@ impl Options {
     /// ```
     pub fn increase_parallelism(&mut self, parallelism: i32) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_increase_parallelism(self.inner,
+            ffi::rocksdb_options_increase_parallelism(self.inner, parallelism);
-                                                              parallelism);
         }
     }
 
-    pub fn optimize_level_style_compaction(&mut self,
+    pub fn optimize_level_style_compaction(&mut self, memtable_memory_budget: usize) {
-                                           memtable_memory_budget: i32) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_optimize_level_style_compaction(
+            ffi::rocksdb_options_optimize_level_style_compaction(self.inner, memtable_memory_budget as uint64_t);
-                self.inner, memtable_memory_budget);
         }
     }
 
@@ -152,8 +135,7 @@ impl Options {
     /// ```
     pub fn create_if_missing(&mut self, create_if_missing: bool) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_create_if_missing(
+            ffi::rocksdb_options_set_create_if_missing(self.inner, create_if_missing as c_uchar);
-                self.inner, create_if_missing);
         }
     }
 
@@ -173,7 +155,7 @@ impl Options {
     /// ```
     pub fn set_compression_type(&mut self, t: DBCompressionType) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_compression(self.inner, t);
+            ffi::rocksdb_options_set_compression(self.inner, t as c_int);
         }
     }
 
@@ -201,74 +183,52 @@ impl Options {
     /// ```
     pub fn compression_per_level(&mut self, level_types: &[DBCompressionType]) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_compression_per_level(self.inner,
+            let level_types: Vec<_> = level_types.iter().map(|&t| t as c_int).collect();
-                                                                level_types.as_ptr(),
+            ffi::rocksdb_options_set_compression_per_level(self.inner, level_types.as_ptr(), level_types.len() as size_t)
-                                                                level_types.len() as size_t)
         }
     }
 
-    pub fn set_merge_operator(&mut self,
+    pub fn set_merge_operator(&mut self, name: &str, merge_fn: MergeFn) {
-                              name: &str,
-                              merge_fn: MergeFn) {
         let cb = Box::new(MergeOperatorCallback {
             name: CString::new(name.as_bytes()).unwrap(),
             merge_fn: merge_fn,
         });
 
         unsafe {
-            let mo = rocksdb_ffi::rocksdb_mergeoperator_create(
+            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));
-                mem::transmute(cb),
+            ffi::rocksdb_options_set_merge_operator(self.inner, mo);
-                merge_operator::destructor_callback,
-                full_merge_callback,
-                partial_merge_callback,
-                None,
-                merge_operator::name_callback);
-            rocksdb_ffi::rocksdb_options_set_merge_operator(self.inner, mo);
         }
     }
 
     #[deprecated(since="0.5.0", note="add_merge_operator has been renamed to set_merge_operator")]
-    pub fn add_merge_operator(&mut self,
+    pub fn add_merge_operator(&mut self, name: &str, merge_fn: MergeFn) {
-                          name: &str,
-                          merge_fn: MergeFn) {
         self.set_merge_operator(name, merge_fn);
     }
 
     /// 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
+    /// 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.
-    //// same name and orders keys *exactly* the same as the comparator
+    pub fn set_comparator(&mut self, name: &str, compare_fn: fn(&[u8], &[u8]) -> i32) {
-    /// 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(),
             f: compare_fn,
         });
 
         unsafe {
-            let cmp = rocksdb_ffi::rocksdb_comparator_create(
+            let cmp = ffi::rocksdb_comparator_create(mem::transmute(cb), Some(comparator::destructor_callback), Some(comparator::compare_callback), Some(comparator::name_callback));
-                mem::transmute(cb),
+            ffi::rocksdb_options_set_comparator(self.inner, cmp);
-                comparator::destructor_callback,
-                compare_callback,
-                comparator::name_callback);
-            rocksdb_ffi::rocksdb_options_set_comparator(self.inner, cmp);
         }
     }
 
     #[deprecated(since = "0.5.0", note = "add_comparator has been renamed to set_comparator")]
-    pub fn add_comparator(&mut self,
+    pub fn add_comparator(&mut self, name: &str, compare_fn: fn(&[u8], &[u8]) -> i32) {
-                          name: &str,
-                          compare_fn: fn(&[u8], &[u8]) -> i32) {
         self.set_comparator(name, compare_fn);
     }
 
     pub fn optimize_for_point_lookup(&mut self, cache_size: u64) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_optimize_for_point_lookup(self.inner,
+            ffi::rocksdb_options_optimize_for_point_lookup(self.inner, cache_size);
-                                                                   cache_size);
         }
     }
 
@@ -290,7 +250,7 @@ impl Options {
     /// ```
     pub fn set_max_open_files(&mut self, nfiles: c_int) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_max_open_files(self.inner, nfiles);
+            ffi::rocksdb_options_set_max_open_files(self.inner, nfiles);
         }
     }
 
@@ -311,11 +271,7 @@ impl Options {
     /// ```
     pub fn set_use_fsync(&mut self, useit: bool) {
         unsafe {
-            if useit {
+            ffi::rocksdb_options_set_use_fsync(self.inner, useit as c_int)
-                rocksdb_ffi::rocksdb_options_set_use_fsync(self.inner, 1)
-            } else {
-                rocksdb_ffi::rocksdb_options_set_use_fsync(self.inner, 0)
-            }
         }
     }
 
@@ -343,17 +299,13 @@ impl Options {
     /// ```
     pub fn set_bytes_per_sync(&mut self, nbytes: u64) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_bytes_per_sync(self.inner, nbytes);
+            ffi::rocksdb_options_set_bytes_per_sync(self.inner, nbytes);
         }
     }
 
     pub fn set_disable_data_sync(&mut self, disable: bool) {
         unsafe {
-            if disable {
+            ffi::rocksdb_options_set_disable_data_sync(self.inner, disable as c_int)
-                rocksdb_ffi::rocksdb_options_set_disable_data_sync(self.inner, 1)
-            } else {
-                rocksdb_ffi::rocksdb_options_set_disable_data_sync(self.inner, 0)
-            }
         }
     }
 
@@ -386,8 +338,7 @@ impl Options {
     /// ```
     pub fn allow_os_buffer(&mut self, is_allow: bool) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_allow_os_buffer(self.inner,
+            ffi::rocksdb_options_set_allow_os_buffer(self.inner, is_allow as c_uchar);
-                                                             is_allow);
         }
     }
 
@@ -405,8 +356,7 @@ impl Options {
     /// ```
     pub fn set_table_cache_num_shard_bits(&mut self, nbits: c_int) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_table_cache_numshardbits(self.inner,
+            ffi::rocksdb_options_set_table_cache_numshardbits(self.inner, nbits);
-                                                                      nbits);
         }
     }
 
@@ -430,8 +380,7 @@ impl Options {
     /// ```
     pub fn set_min_write_buffer_number(&mut self, nbuf: c_int) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_min_write_buffer_number_to_merge(
+            ffi::rocksdb_options_set_min_write_buffer_number_to_merge(self.inner, nbuf);
-                self.inner, nbuf);
         }
     }
 
@@ -470,8 +419,7 @@ impl Options {
     /// ```
     pub fn set_max_write_buffer_number(&mut self, nbuf: c_int) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_max_write_buffer_number(self.inner,
+            ffi::rocksdb_options_set_max_write_buffer_number(self.inner, nbuf);
-                                                                     nbuf);
         }
     }
 
@@ -502,8 +450,7 @@ impl Options {
     /// ```
     pub fn set_write_buffer_size(&mut self, size: usize) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_write_buffer_size(self.inner,
+            ffi::rocksdb_options_set_write_buffer_size(self.inner, size);
-                                                               size);
         }
     }
 
@@ -530,7 +477,7 @@ impl Options {
     /// ```
     pub fn set_max_bytes_for_level_base(&mut self, size: u64) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_max_bytes_for_level_base(self.inner, size);
+            ffi::rocksdb_options_set_max_bytes_for_level_base(self.inner, size);
         }
     }
 
@@ -546,7 +493,7 @@ impl Options {
     /// ```
     pub fn set_max_bytes_for_level_multiplier(&mut self, mul: i32) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_max_bytes_for_level_multiplier(self.inner, mul);
+            ffi::rocksdb_options_set_max_bytes_for_level_multiplier(self.inner, mul);
         }
     }
 
@@ -564,7 +511,7 @@ impl Options {
     /// ```
     pub fn set_max_manifest_file_size(&mut self, size: usize) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_max_manifest_file_size(self.inner, size);
+            ffi::rocksdb_options_set_max_manifest_file_size(self.inner, size);
         }
     }
 
@@ -591,8 +538,7 @@ impl Options {
     /// ```
     pub fn set_target_file_size_base(&mut self, size: u64) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_target_file_size_base(self.inner,
+            ffi::rocksdb_options_set_target_file_size_base(self.inner, size);
-                                                                   size);
         }
     }
 
@@ -616,8 +562,7 @@ impl Options {
     /// ```
     pub fn set_min_write_buffer_number_to_merge(&mut self, to_merge: c_int) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_min_write_buffer_number_to_merge(
+            ffi::rocksdb_options_set_min_write_buffer_number_to_merge(self.inner, to_merge);
-                self.inner, to_merge);
         }
     }
 
@@ -638,8 +583,7 @@ impl Options {
     /// ```
     pub fn set_level_zero_file_num_compaction_trigger(&mut self, n: c_int) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_level0_file_num_compaction_trigger(
+            ffi::rocksdb_options_set_level0_file_num_compaction_trigger(self.inner, n);
-                self.inner, n);
         }
     }
 
@@ -661,8 +605,7 @@ impl Options {
     /// ```
     pub fn set_level_zero_slowdown_writes_trigger(&mut self, n: c_int) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_level0_slowdown_writes_trigger(
+            ffi::rocksdb_options_set_level0_slowdown_writes_trigger(self.inner, n);
-                self.inner, n);
         }
     }
 
@@ -682,8 +625,7 @@ impl Options {
     /// ```
     pub fn set_level_zero_stop_writes_trigger(&mut self, n: c_int) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_level0_stop_writes_trigger(
+            ffi::rocksdb_options_set_level0_stop_writes_trigger(self.inner, n);
-                self.inner, n);
         }
     }
 
@@ -699,11 +641,9 @@ impl Options {
     /// let mut opts = Options::default();
     /// opts.set_compaction_style(DBCompactionStyle::Universal);
     /// ```
-    pub fn set_compaction_style(&mut self,
+    pub fn set_compaction_style(&mut self, style: DBCompactionStyle) {
-                                style: rocksdb_ffi::DBCompactionStyle) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_compaction_style(self.inner,
+            ffi::rocksdb_options_set_compaction_style(self.inner, style as c_int);
-                                                              style);
         }
     }
 
@@ -731,8 +671,7 @@ impl Options {
     /// ```
     pub fn set_max_background_compactions(&mut self, n: c_int) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_max_background_compactions(
+            ffi::rocksdb_options_set_max_background_compactions(self.inner, n);
-                self.inner, n);
         }
     }
 
@@ -763,8 +702,7 @@ impl Options {
     /// ```
     pub fn set_max_background_flushes(&mut self, n: c_int) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_max_background_flushes(self.inner,
+            ffi::rocksdb_options_set_max_background_flushes(self.inner, n);
-                                                                    n);
         }
     }
 
@@ -784,20 +722,14 @@ impl Options {
     /// opts.set_disable_auto_compactions(true);
     /// ```
     pub fn set_disable_auto_compactions(&mut self, disable: bool) {
-        let c_bool = if disable {
-            1
-        } else {
-            0
-        };
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_disable_auto_compactions(self.inner, c_bool)
+            ffi::rocksdb_options_set_disable_auto_compactions(self.inner, disable as c_int)
         }
     }
 
-    pub fn set_block_based_table_factory(&mut self,
+    pub fn set_block_based_table_factory(&mut self, factory: &BlockBasedOptions) {
-                                         factory: &BlockBasedOptions) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_block_based_table_factory(self.inner, factory.inner);
+            ffi::rocksdb_options_set_block_based_table_factory(self.inner, factory.inner);
         }
     }
 
@@ -815,11 +747,7 @@ impl Options {
     /// ```
     pub fn set_report_bg_io_stats(&mut self, enable: bool) {
         unsafe {
-            if enable {
+            ffi::rocksdb_options_set_report_bg_io_stats(self.inner, enable as c_int);
-                rocksdb_ffi::rocksdb_options_set_report_bg_io_stats(self.inner, 1);
-            } else {
-                rocksdb_ffi::rocksdb_options_set_report_bg_io_stats(self.inner, 0);
-            }
         }
     }
 
@@ -837,26 +765,24 @@ impl Options {
     /// ```
     pub fn set_wal_recovery_mode(&mut self, mode: DBRecoveryMode) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_wal_recovery_mode(self.inner, mode);
+            ffi::rocksdb_options_set_wal_recovery_mode(self.inner, mode as c_int);
         }
     }
 
     pub fn enable_statistics(&mut self) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_enable_statistics(self.inner);
+            ffi::rocksdb_options_enable_statistics(self.inner);
         }
     }
 
     pub fn get_statistics(&self) -> Option<String> {
         unsafe {
-            let value = rocksdb_ffi::rocksdb_options_statistics_get_string(self.inner);
+            let value = ffi::rocksdb_options_statistics_get_string(self.inner);
-
-
             if value.is_null() {
                 return None;
             }
 
-            // Must valid UTF-8 format.
+            // Must have valid UTF-8 format.
             let s = CStr::from_ptr(value).to_str().unwrap().to_owned();
             libc::free(value as *mut c_void);
             Some(s)
@@ -875,17 +801,16 @@ impl Options {
     /// let mut opts = Options::default();
     /// opts.set_stats_dump_period_sec(300);
     /// ```
-    pub fn set_stats_dump_period_sec(&mut self, period: usize) {
+    pub fn set_stats_dump_period_sec(&mut self, period: c_uint) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_stats_dump_period_sec(self.inner,
+            ffi::rocksdb_options_set_stats_dump_period_sec(self.inner, period);
-                                                      period);
         }
     }
 
     /// Sets the number of levels for this database
     pub fn set_num_levels(&mut self, n: c_int) {
         unsafe {
-            rocksdb_ffi::rocksdb_options_set_num_levels(self.inner, n);
+            ffi::rocksdb_options_set_num_levels(self.inner, n);
         }
     }
 }
@@ -893,9 +818,9 @@ impl Options {
 impl Default for Options {
     fn default() -> Options {
         unsafe {
-            let opts = rocksdb_ffi::rocksdb_options_create();
+            let opts = ffi::rocksdb_options_create();
             if opts.is_null() {
-                panic!("Could not create rocksdb options".to_string());
+                panic!("Could not create rocksdb options".to_owned());
             }
             Options { inner: opts }
         }
@@ -910,26 +835,22 @@ impl WriteOptions {
 
     pub fn set_sync(&mut self, sync: bool) {
         unsafe {
-            rocksdb_ffi::rocksdb_writeoptions_set_sync(self.inner, sync);
+            ffi::rocksdb_writeoptions_set_sync(self.inner, sync as c_uchar);
         }
     }
 
     pub fn disable_wal(&mut self, disable: bool) {
         unsafe {
-            if disable {
+            ffi::rocksdb_writeoptions_disable_WAL(self.inner, disable as c_int);
-                rocksdb_ffi::rocksdb_writeoptions_disable_WAL(self.inner, 1);
-            } else {
-                rocksdb_ffi::rocksdb_writeoptions_disable_WAL(self.inner, 0);
-            }
         }
     }
 }
 
 impl Default for WriteOptions {
     fn default() -> WriteOptions {
-        let write_opts = unsafe { rocksdb_ffi::rocksdb_writeoptions_create() };
+        let write_opts = unsafe { ffi::rocksdb_writeoptions_create() };
         if write_opts.is_null() {
-            panic!("Could not create rocksdb write options".to_string());
+            panic!("Could not create rocksdb write options".to_owned());
         }
         WriteOptions { inner: write_opts }
     }
@@ -937,7 +858,7 @@ impl Default for WriteOptions {
 
 #[cfg(test)]
 mod tests {
-    use super::Options;
+    use Options;
 
     #[test]
     fn test_enable_statistics() {