LCOV - code coverage report
Current view: top level - glib/glib - gprimes.c (source / functions) Hit Total Coverage
Test: unnamed Lines: 5 5 100.0 %
Date: 2024-03-26 05:16:46 Functions: 1 1 100.0 %
Branches: 4 4 100.0 %

           Branch data     Line data    Source code
       1                 :            : /* GLIB - Library of useful routines for C programming
       2                 :            :  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
       3                 :            :  *
       4                 :            :  * SPDX-License-Identifier: LGPL-2.1-or-later
       5                 :            :  *
       6                 :            :  * This library is free software; you can redistribute it and/or
       7                 :            :  * modify it under the terms of the GNU Lesser General Public
       8                 :            :  * License as published by the Free Software Foundation; either
       9                 :            :  * version 2.1 of the License, or (at your option) any later version.
      10                 :            :  *
      11                 :            :  * This library is distributed in the hope that it will be useful,
      12                 :            :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13                 :            :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14                 :            :  * Lesser General Public License for more details.
      15                 :            :  *
      16                 :            :  * You should have received a copy of the GNU Lesser General Public
      17                 :            :  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
      18                 :            :  */
      19                 :            : 
      20                 :            : /*
      21                 :            :  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
      22                 :            :  * file for a list of people on the GLib Team.  See the ChangeLog
      23                 :            :  * files for a list of changes.  These files are distributed with
      24                 :            :  * GLib at ftp://ftp.gtk.org/pub/gtk/.
      25                 :            :  */
      26                 :            : 
      27                 :            : /*
      28                 :            :  * MT safe
      29                 :            :  */
      30                 :            : 
      31                 :            : #include "config.h"
      32                 :            : 
      33                 :            : #include "gprimes.h"
      34                 :            : 
      35                 :            : 
      36                 :            : static const guint g_primes[] =
      37                 :            : {
      38                 :            :   11,
      39                 :            :   19,
      40                 :            :   37,
      41                 :            :   73,
      42                 :            :   109,
      43                 :            :   163,
      44                 :            :   251,
      45                 :            :   367,
      46                 :            :   557,
      47                 :            :   823,
      48                 :            :   1237,
      49                 :            :   1861,
      50                 :            :   2777,
      51                 :            :   4177,
      52                 :            :   6247,
      53                 :            :   9371,
      54                 :            :   14057,
      55                 :            :   21089,
      56                 :            :   31627,
      57                 :            :   47431,
      58                 :            :   71143,
      59                 :            :   106721,
      60                 :            :   160073,
      61                 :            :   240101,
      62                 :            :   360163,
      63                 :            :   540217,
      64                 :            :   810343,
      65                 :            :   1215497,
      66                 :            :   1823231,
      67                 :            :   2734867,
      68                 :            :   4102283,
      69                 :            :   6153409,
      70                 :            :   9230113,
      71                 :            :   13845163,
      72                 :            : };
      73                 :            : 
      74                 :            : /**
      75                 :            :  * g_spaced_primes_closest:
      76                 :            :  * @num: a #guint
      77                 :            :  *
      78                 :            :  * Gets the smallest prime number from a built-in array of primes which
      79                 :            :  * is larger than @num. This is used within GLib to calculate the optimum
      80                 :            :  * size of a #GHashTable.
      81                 :            :  *
      82                 :            :  * The built-in array of primes ranges from 11 to 13845163 such that
      83                 :            :  * each prime is approximately 1.5-2 times the previous prime.
      84                 :            :  *
      85                 :            :  * Returns: the smallest prime number from a built-in array of primes
      86                 :            :  *     which is larger than @num
      87                 :            :  */
      88                 :            : guint
      89                 :         36 : g_spaced_primes_closest (guint num)
      90                 :            : {
      91                 :            :   gsize i;
      92                 :            : 
      93         [ +  + ]:        632 :   for (i = 0; i < G_N_ELEMENTS (g_primes); i++)
      94         [ +  + ]:        631 :     if (g_primes[i] > num)
      95                 :         35 :       return g_primes[i];
      96                 :            : 
      97                 :          1 :   return g_primes[G_N_ELEMENTS (g_primes) - 1];
      98                 :            : }

Generated by: LCOV version 1.14