clog10.c

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/*-
 * Copyright (c) 2014-2018 Carsten Sonne Larsen <cs@innolan.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 */

#include "prim.h"

/**
 * @brief  Base 10 logarithmic value of complex number
 * @details
 * <pre>
 * log z = log(z) / log(10)
 * </pre>
 * More info is available at Wikipedia: <BR>
 * https://wikipedia.org/wiki/Complex_logarithm
 */
complex clog10(complex z)
{
    complex teen = cpack(10.0, 0.0);
    complex w = cdiv(clog(z), clog(teen));
    return w;
}