internal/ceres/collections_port.cc

// Ceres Solver - A fast non-linear least squares minimizer
// Copyright 2010, 2011, 2012 Google Inc. All rights reserved.
// http://code.google.com/p/ceres-solver/
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// Author: keir@google.com (Keir Mierle)

#include "ceres/collections_port.h"

inline uint32 Hash32NumWithSeed(uint32 num, uint32 c) {
  uint32 b = 0x9e3779b9UL;            // the golden ratio; an arbitrary value
  mix(num, b, c);
  return c;
}

inline uint64 Hash64NumWithSeed(uint64 num, uint64 c) {
  uint64 b = GG_ULONGLONG(0xe08c1d668b756f82);   // more of the golden ratio
  mix(num, b, c);
  return c;
}