src/SquidMath.cc

   1 /*
   2  * Copyright (C) 1996-2020 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #include "squid.h"
  10 #include "SquidMath.h"
  11
  12 int
  13 Math::intPercent(const int a, const int b)
  14 {
  15     return b ? ((int) (100.0 * a / b + 0.5)) : 0;
  16 }
  17
  18 int64_t
  19 Math::int64Percent(const int64_t a, const int64_t b)
  20 {
  21     return b ? ((int64_t) (100.0 * a / b + 0.5)) : 0;
  22 }
  23
  24 double
  25 Math::doublePercent(const double a, const double b)
  26 {
  27     return b ? (100.0 * a / b) : 0.0;
  28 }
  29
  30 double
  31 Math::doubleAverage(const double cur, const double newD, int N, const int max)
  32 {
  33     if (N > max)
  34         N = max;
  35
  36     return (cur * (N - 1.0) + newD) / N;
  37 }
  38
  39 int
  40 Math::intAverage(const int cur, const int newI, int n, const int max)
  41 {
  42     if (n > max)
  43         n = max;
  44
  45     return (cur * (n - 1) + newI) / n;
  46 }
  47