[geodb] Adding sparkey dependency

src/sparkey/hashalgorithms.c

@@ -0,0 +1,50 @@
+/*
+* Copyright (c) 2012-2013 Spotify AB
+*
+* 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.
+*/
+#include "hashalgorithms.h"
+#include "MurmurHash3.h"
+
+static uint64_t _read_little_endian32(const uint8_t *data, uint64_t pos) {
+  return read_little_endian32(data, pos);
+}
+
+static void _write_little_endian32(uint8_t *data, uint64_t hash) {
+  write_little_endian32(data, hash);
+}
+
+static sparkey_hash_algorithm murmurhash32 = {
+  &murmurhash32_hash,
+  &_read_little_endian32,
+  &_write_little_endian32
+};
+
+static sparkey_hash_algorithm murmurhash64 = {
+  &murmurhash64_hash,
+  &read_little_endian64,
+  &write_little_endian64
+};
+
+static sparkey_hash_algorithm invalid = {
+  NULL, NULL, NULL
+};
+
+sparkey_hash_algorithm sparkey_get_hash_algorithm(uint32_t hash_size) {
+  switch (hash_size) {
+    case 4: return murmurhash32;
+    case 8: return murmurhash64;
+    default: return invalid;
+  }
+}
+