cmake: fix path to FindGLog.cmake

[folly.git] / folly / Fingerprint.h

diff --git a/folly/Fingerprint.h b/folly/Fingerprint.h
index f1980ae215aa2b35afe248ad0e60b762fcad7b66..9cf0f5073c1bf35686c4abd0eb77e9d86872172f 100644 (file)
--- a/folly/Fingerprint.h
+++ b/folly/Fingerprint.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Facebook, Inc.
+ * Copyright 2012-present Facebook, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -51,12 +51,37 @@
 namespace folly {
 
 namespace detail {
+
 template <int BITS>
 struct FingerprintTable {
-  static const uint64_t poly[1 + (BITS-1)/64];
-  static const uint64_t table[8][256][1 + (BITS-1)/64];
+  static const uint64_t poly[1 + (BITS - 1) / 64];
+  static const uint64_t table[8][256][1 + (BITS - 1) / 64];
 };
-}  // namespace detail
+
+template <int BITS>
+const uint64_t FingerprintTable<BITS>::poly[1 + (BITS - 1) / 64] = {};
+template <int BITS>
+const uint64_t FingerprintTable<BITS>::table[8][256][1 + (BITS - 1) / 64] = {};
+
+#ifndef _MSC_VER
+// MSVC 2015 can't handle these extern specialization declarations,
+// but they aren't needed for things to work right, so we just don't
+// declare them in the header for MSVC.
+
+#define FOLLY_DECLARE_FINGERPRINT_TABLES(BITS)                      \
+  template <>                                                       \
+  const uint64_t FingerprintTable<BITS>::poly[1 + (BITS - 1) / 64]; \
+  template <>                                                       \
+  const uint64_t FingerprintTable<BITS>::table[8][256][1 + (BITS - 1) / 64]
+
+FOLLY_DECLARE_FINGERPRINT_TABLES(64);
+FOLLY_DECLARE_FINGERPRINT_TABLES(96);
+FOLLY_DECLARE_FINGERPRINT_TABLES(128);
+
+#undef FOLLY_DECLARE_FINGERPRINT_TABLES
+#endif
+
+} // namespace detail
 
 /**
  * Compute the Rabin fingerprint.
@@ -74,8 +99,9 @@ class Fingerprint {
   Fingerprint() {
     // Use a non-zero starting value. We'll use (1 << (BITS-1))
     fp_[0] = 1ULL << 63;
-    for (int i = 1; i < size(); i++)
+    for (int i = 1; i < size(); i++) {
       fp_[i] = 0;
+    }
   }
 
   Fingerprint& update8(uint8_t v) {
@@ -259,4 +285,4 @@ inline uint64_t Fingerprint<128>::shlor64(uint64_t v) {
   return out;
 }
 
-}  // namespace folly
+} // namespace folly