LCOV - code coverage report
Current view: directory - nsprpub/pr/src/misc - prlog2.c (source / functions) Found Hit Coverage
Test: app.info Lines: 6 6 100.0 %
Date: 2012-06-02 Functions: 2 2 100.0 %

       1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is the Netscape Portable Runtime (NSPR).
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998-2000
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "prbit.h"
      39                 : 
      40                 : /*
      41                 : ** Compute the log of the least power of 2 greater than or equal to n
      42                 : */
      43           12783 : PR_IMPLEMENT(PRIntn) PR_CeilingLog2(PRUint32 n)
      44                 : {
      45                 :     PRIntn log2;
      46           12783 :     PR_CEILING_LOG2(log2, n);
      47           12783 :     return log2;
      48                 : }
      49                 : 
      50                 : /*
      51                 : ** Compute the log of the greatest power of 2 less than or equal to n.
      52                 : ** This really just finds the highest set bit in the word.
      53                 : */
      54           14204 : PR_IMPLEMENT(PRIntn) PR_FloorLog2(PRUint32 n)
      55                 : {
      56                 :     PRIntn log2;
      57           14204 :     PR_FLOOR_LOG2(log2, n);
      58           14204 :     return log2;
      59                 : }

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