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Move platform/default/fingerprint.h into platform/fingerprint.h.

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PiperOrigin-RevId: 245060405
This commit is contained in:
James Ring 2019-04-24 09:39:50 -07:00 committed by TensorFlower Gardener
parent 7fc8865004
commit 70800b7f7f
2 changed files with 32 additions and 50 deletions
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37
tensorflow/core/platform/default/fingerprint.h
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@ -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_

45
tensorflow/core/platform/fingerprint.h
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@ -19,6 +19,16 @@ limitations under the License.
#include "tensorflow/core/lib/core/stringpiece.h" #include "tensorflow/core/lib/core/stringpiece.h"
#include "tensorflow/core/platform/types.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 { namespace tensorflow {
struct Fprint128 { 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 { namespace internal {
// Mixes some of the bits that got propagated to the high bits back into the // Mixes some of the bits that got propagated to the high bits back into the
// low bits. // low bits.
@ -72,12 +75,28 @@ inline uint64 FingerprintCat64(const uint64 fp1, const uint64 fp2) {
return result; return result;
} }
// 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
}
// 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
const auto fingerprint = farmhash::Fingerprint128(s.data(), s.size());
return {absl::Uint128Low64(fingerprint), absl::Uint128High64(fingerprint)};
#endif
}
} // namespace tensorflow } // namespace tensorflow
#if defined(PLATFORM_GOOGLE) || defined(PLATFORM_GOOGLE_ANDROID)
#include "tensorflow/core/platform/google/fingerprint.h"
#else
#include "tensorflow/core/platform/default/fingerprint.h"
#endif
#endif // TENSORFLOW_CORE_PLATFORM_FINGERPRINT_H_ #endif // TENSORFLOW_CORE_PLATFORM_FINGERPRINT_H_