From 70800b7f7f300bb307a5bba15f0572cfb6fdc47c Mon Sep 17 00:00:00 2001
From: James Ring <sjr@google.com>
Date: Wed, 24 Apr 2019 09:39:50 -0700
Subject: [PATCH] Move platform/default/fingerprint.h into
 platform/fingerprint.h.

PiperOrigin-RevId: 245060405
---
 .../core/platform/default/fingerprint.h       | 37 -----------------
 tensorflow/core/platform/fingerprint.h        | 41 ++++++++++++++-----
 2 files changed, 30 insertions(+), 48 deletions(-)
 delete mode 100644 tensorflow/core/platform/default/fingerprint.h

diff --git a/tensorflow/core/platform/default/fingerprint.h b/tensorflow/core/platform/default/fingerprint.h
deleted file mode 100644
index f901befc16bafd..00000000000000
--- a/tensorflow/core/platform/default/fingerprint.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/* Copyright 2016 The TensorFlow Authors. All Rights Reserved.
-
-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.
-==============================================================================*/
-
-#ifndef TENSORFLOW_CORE_PLATFORM_DEFAULT_FINGERPRINT_H_
-#define TENSORFLOW_CORE_PLATFORM_DEFAULT_FINGERPRINT_H_
-
-#include <farmhash.h>
-
-#include "tensorflow/core/lib/core/stringpiece.h"
-
-namespace tensorflow {
-
-inline uint64 Fingerprint64(StringPiece s) {
-  return ::util::Fingerprint64(s.data(), s.size());
-}
-
-inline Fprint128 Fingerprint128(StringPiece s) {
-  const auto fingerprint = ::util::Fingerprint128(s.data(), s.size());
-  return {::util::Uint128Low64(fingerprint),
-          ::util::Uint128High64(fingerprint)};
-}
-
-}  // namespace tensorflow
-
-#endif  // TENSORFLOW_CORE_PLATFORM_DEFAULT_FINGERPRINT_H_
diff --git a/tensorflow/core/platform/fingerprint.h b/tensorflow/core/platform/fingerprint.h
index 720dc4c3d6b066..d460514acccfd0 100644
--- a/tensorflow/core/platform/fingerprint.h
+++ b/tensorflow/core/platform/fingerprint.h
@@ -19,6 +19,16 @@ limitations under the License.
 #include "tensorflow/core/lib/core/stringpiece.h"
 #include "tensorflow/core/platform/types.h"
 
+// The following line is used by copybara to set or unset the USE_OSS_FARMHASH
+// preprocessor symbol as needed. Please do not remove.
+#define USE_OSS_FARMHASH
+
+#ifdef USE_OSS_FARMHASH
+#include <farmhash.h>
+#else
+#include "util/hash/farmhash_fingerprint.h"
+#endif
+
 namespace tensorflow {
 
 struct Fprint128 {
@@ -37,13 +47,6 @@ struct Fprint128Hasher {
   }
 };
 
-// This is a portable fingerprint interface for strings that will never change.
-// However, it is not suitable for cryptography.
-uint64 Fingerprint64(StringPiece s);
-
-// 128-bit variant of Fingerprint64 above (same properties and caveats apply).
-Fprint128 Fingerprint128(StringPiece s);
-
 namespace internal {
 // Mixes some of the bits that got propagated to the high bits back into the
 // low bits.
@@ -72,12 +75,28 @@ inline uint64 FingerprintCat64(const uint64 fp1, const uint64 fp2) {
   return result;
 }
 
-}  // namespace tensorflow
+// This is a portable fingerprint interface for strings that will never change.
+// However, it is not suitable for cryptography.
+inline uint64 Fingerprint64(StringPiece s) {
+#ifdef USE_OSS_FARMHASH
+  return ::util::Fingerprint64(s.data(), s.size());
+#else
+  return farmhash::Fingerprint64(s.data(), s.size());
+#endif
+}
 
-#if defined(PLATFORM_GOOGLE) || defined(PLATFORM_GOOGLE_ANDROID)
-#include "tensorflow/core/platform/google/fingerprint.h"
+// 128-bit variant of Fingerprint64 above (same properties and caveats apply).
+inline Fprint128 Fingerprint128(StringPiece s) {
+#ifdef USE_OSS_FARMHASH
+  const auto fingerprint = ::util::Fingerprint128(s.data(), s.size());
+  return {::util::Uint128Low64(fingerprint),
+          ::util::Uint128High64(fingerprint)};
 #else
-#include "tensorflow/core/platform/default/fingerprint.h"
+  const auto fingerprint = farmhash::Fingerprint128(s.data(), s.size());
+  return {absl::Uint128Low64(fingerprint), absl::Uint128High64(fingerprint)};
 #endif
+}
+
+}  // namespace tensorflow
 
 #endif  // TENSORFLOW_CORE_PLATFORM_FINGERPRINT_H_