Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/opensubdiv/bfr/hash.h

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+//
+//   Copyright 2021 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#ifndef OPENSUBDIV3_BFR_HASH_H
+#define OPENSUBDIV3_BFR_HASH_H
+
+#include "../version.h"
+
+#include <cstdint>
+#include <cstddef>
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Bfr {
+namespace internal {
+
+//
+//  Internal functions to hash data to unsigned ints for caching. Both
+//  32- and 64-bit versions are provided here, but only 64-bit versions
+//  are currently intended for internal use (so consider removing 32).
+//
+//  To compute a hash value for data that is not contiguous in memory,
+//  iterate over all the contiguous blocks of memory and accumulate the
+//  hash value by passing it on as a seed.  Note that this is *not*
+//  equivalent to hashing the contiguous pieces as a whole.  Support
+//  for that may be added in future.
+// 
+uint32_t Hash32(const void *data, size_t len);
+uint32_t Hash32(const void *data, size_t len, uint32_t seed);
+
+uint64_t Hash64(const void *data, size_t len);
+uint64_t Hash64(const void *data, size_t len, uint64_t seed);
+
+} // end namespace internal
+} // end namespace Bfr
+
+} // end namespace OPENSUBDIV_VERSION
+using namespace OPENSUBDIV_VERSION;
+} // end namespace OpenSubdiv
+
+#endif /* OPENSUBDIV3_BFR_HASH_H */