SquidMath.cc

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/*
 * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */
 
#include "squid.h"
#include "SquidMath.h"
 
int
Math::intPercent(const int a, const int b)
{
    return b ? ((int) (100.0 * a / b + 0.5)) : 0;
}
 
int64_t
Math::int64Percent(const int64_t a, const int64_t b)
{
    return b ? ((int64_t) (100.0 * a / b + 0.5)) : 0;
}
 
double
Math::doublePercent(const double a, const double b)
{
    return b ? (100.0 * a / b) : 0.0;
}
 
double
Math::doubleAverage(const double cur, const double newD, int N, const int max)
{
    if (N > max)
        N = max;
 
    return (cur * (N - 1.0) + newD) / N;
}
 
int
Math::intAverage(const int cur, const int newI, int n, const int max)
{
    if (n > max)
        n = max;
 
    return (cur * (n - 1) + newI) / n;
}