lookup3-wrap.cc

// Copyright (c) 2014, Robert Escriva
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright notice,
//       this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
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//     * Neither the name of this project nor the names of its contributors may
//       be used to endorse or promote products derived from this software
//       without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// C
#include <stdlib.h>

// e
#include <e/lookup3.h>

// Declare the C functions
extern "C"
{

void
hashlittle2(const void* key, size_t length, uint32_t* pc, uint32_t* pb);

} // extern "C"

uint64_t
e :: lookup3_64(uint64_t in)
{
    uint32_t pc = 0;
    uint32_t pb = 0;
    hashlittle2(&in, sizeof(in), &pc, &pb);
    uint64_t out = pc;
    out <<= 32;
    out |= pb;
    return out;
}