1 files changed, 64 insertions, 0 deletions
diff --git a/icnet/utils/icnet_utils_hash.cc b/icnet/utils/icnet_utils_hash.cc
new file mode 100644
index 00000000..39dd0229
--- /dev/null
+++ b/icnet/utils/icnet_utils_hash.cc
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * 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 "icnet_utils_hash.h"
+
+namespace icnet {
+
+namespace utils {
+
+uint32_t Hash::hash32(const void *data, std::size_t len) {
+  const uint32_t fnv1a_offset = 0x811C9DC5;
+  return Hash::cumulativeHash32(data, len, fnv1a_offset);
+}
+
+uint32_t Hash::cumulativeHash32(const void *data, std::size_t len, uint32_t lastValue) {
+  // Standard FNV 32-bit prime: see http://www.isthe.com/chongo/tech/comp/fnv/#FNV-param
+  const uint32_t fnv1a_prime = 0x01000193;
+  uint32_t hash = lastValue;
+
+  const char *chardata = (char *) data;
+
+  for (std::size_t i = 0; i < len; i++) {
+    hash = hash ^ chardata[i];
+    hash = hash * fnv1a_prime;
+  }
+
+  return hash;
+}
+
+uint64_t Hash::hash64(const void *data, std::size_t len) {
+  // Standard FNV 64-bit offset: see http://www.isthe.com/chongo/tech/comp/fnv/#FNV-param
+  const uint64_t fnv1a_offset = 0xCBF29CE484222325ULL;
+  return cumulativeHash64(data, len, fnv1a_offset);
+}
+
+uint64_t Hash::cumulativeHash64(const void *data, std::size_t len, uint64_t lastValue) {
+  // Standard FNV 64-bit prime: see http://www.isthe.com/chongo/tech/comp/fnv/#FNV-param
+  const uint64_t fnv1a_prime = 0x00000100000001B3ULL;
+  uint64_t hash = lastValue;
+  const char *chardata = (char *) data;
+
+  for (std::size_t i = 0; i < len; i++) {
+    hash = hash ^ chardata[i];
+    hash = hash * fnv1a_prime;
+  }
+
+  return hash;
+}
+
+}
+
+}
+\ No newline at end of file