Add rocksdb_iter_key_fast & rocksdb_iter_value_fast

Author: rockeet

db/c.cc

@@ -7,6 +7,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file. See the AUTHORS file for names of contributors.
 
+#define ROCKSDB_C_API_IMPLEMENTATION
+
 #include "rocksdb/c.h"
 
 #include <cstdlib>
@@ -136,6 +138,7 @@ using std::unordered_set;
 using std::vector;
 
 extern "C" {
+using rocksdb_slice_t = Slice;
 
 struct rocksdb_t {
   DB* rep;
@@ -1954,6 +1957,19 @@ void rocksdb_iter_get_error(const rocksdb_iterator_t* iter, char** errptr) {
   SaveError(errptr, iter->rep->status());
 }
 
+ROCKSDB_LIBRARY_API
+rocksdb_slice_t rocksdb_iter_key_fast(const rocksdb_iterator_t* iter) {
+  return iter->rep->key();
+}
+ROCKSDB_LIBRARY_API
+rocksdb_slice_t rocksdb_iter_value_fast(const rocksdb_iterator_t* iter) {
+  return iter->rep->value();
+}
+ROCKSDB_LIBRARY_API
+rocksdb_slice_t rocksdb_iter_timestamp_fast(const rocksdb_iterator_t* iter) {
+  return iter->rep->timestamp();
+}
+
 rocksdb_writebatch_t* rocksdb_writebatch_create() {
   return new rocksdb_writebatch_t;
 }

include/rocksdb/c.h

@@ -142,6 +142,14 @@ typedef struct rocksdb_statistics_histogram_data_t
 typedef struct rocksdb_wait_for_compact_options_t
     rocksdb_wait_for_compact_options_t;
 
+#if !defined(ROCKSDB_C_API_IMPLEMENTATION)
+struct rocksdb_slice_t {
+  const char* data;
+  size_t size;
+};
+typedef struct rocksdb_slice_t rocksdb_slice_t;
+#endif
+
 /* DB operations */
 
 extern ROCKSDB_LIBRARY_API rocksdb_t* rocksdb_open(
@@ -728,6 +736,15 @@ extern ROCKSDB_LIBRARY_API const char* rocksdb_iter_timestamp(
 extern ROCKSDB_LIBRARY_API void rocksdb_iter_get_error(
     const rocksdb_iterator_t*, char** errptr);
 
+#if !defined(ROCKSDB_C_API_IMPLEMENTATION)
+extern ROCKSDB_LIBRARY_API rocksdb_slice_t rocksdb_iter_key_fast(
+    const rocksdb_iterator_t*);
+extern ROCKSDB_LIBRARY_API rocksdb_slice_t rocksdb_iter_value_fast(
+    const rocksdb_iterator_t*);
+extern ROCKSDB_LIBRARY_API rocksdb_slice_t rocksdb_iter_timestamp_fast(
+    const rocksdb_iterator_t*);
+#endif
+
 extern ROCKSDB_LIBRARY_API void rocksdb_wal_iter_next(
     rocksdb_wal_iterator_t* iter);
 extern ROCKSDB_LIBRARY_API unsigned char rocksdb_wal_iter_valid(