Function l_hashFloat64ToUint64

deps/leptonica/src/utils1.c:653–664

! * \brief l_hashFloat64ToUint64() * * \param[in] nbuckets * \param[in] val * \param[out] phash hash value * \return 0 if OK, 1 on error * * * Notes: * (1) Simple, fast hash for using dnaHash with 64-bit data * (e.g., sets and histograms). * (2) The resulting hash is called a "key" in a lookup * operation. The bucket for %val in a dnaHash

 * </pre>
 */
l_int32
l_hashFloat64ToUint64(l_int32    nbuckets,
                      l_float64  val,
                      l_uint64  *phash)
{
    PROCNAME("l_hashFloatToUint64");

    if (!phash)
        return ERROR_INT("&hash not defined", procName, 1);
    *phash = (l_uint64)((21.732491 * nbuckets) * val);
    return 0;
}


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