Adding uint64 encoding utilities

c_src/erl_nif_util.c

@@ -0,0 +1,49 @@
+// -------------------------------------------------------------------
+//
+// bitcask: Eric Brewer-inspired key/value store
+//
+// Copyright (c) 2010 Basho Technologies, Inc. All Rights Reserved.
+//
+// This file is provided to you 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.
+//
+// -------------------------------------------------------------------
+
+#include "erl_nif_util.h"
+#include "erl_nif_compat.h"
+
+#include <string.h>
+
+int enif_get_uint64_bin(ErlNifEnv* env, ERL_NIF_TERM term, uint64_t* outvalue)
+{
+    ErlNifBinary bin;
+    if (enif_inspect_binary(env, term, &bin) && bin.size == sizeof(uint64_t))
+    {
+        memcpy(outvalue, ((uint64_t*)bin.data), sizeof(uint64_t));
+        return 1;
+    }
+    else
+    {
+        return 0;
+    }
+}
+
+ERL_NIF_TERM enif_make_uint64_bin(ErlNifEnv* env, uint64_t value)
+{
+    ErlNifBinary bin;
+    enif_alloc_binary_compat(env, sizeof(uint64_t), &bin);
+    memcpy(bin.data, &value, sizeof(uint64_t));
+    return enif_make_binary(env, &bin);
+}
+

c_src/erl_nif_util.h

@@ -0,0 +1,32 @@
+// -------------------------------------------------------------------
+//
+// bitcask: Eric Brewer-inspired key/value store
+//
+// Copyright (c) 2010 Basho Technologies, Inc. All Rights Reserved.
+//
+// This file is provided to you 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.
+//
+// -------------------------------------------------------------------
+#ifndef ERL_NIF_UTIL_H
+#define ERL_NIF_UTIL_H
+
+#include "erl_nif.h"
+#include <stdint.h>
+
+int enif_get_uint64_bin(ErlNifEnv* env, ERL_NIF_TERM term, uint64_t* outvalue);
+
+ERL_NIF_TERM enif_make_uint64_bin(ErlNifEnv* env, uint64_t value);
+
+#endif