annotate nspr/pr/src/misc/prlog2.c @ 0:1e5118fa0cb1

This is NSS with a Cmake Buildsyste To compile a static NSS library for Windows we've used the Chromium-NSS fork and added a Cmake buildsystem to compile it statically for Windows. See README.chromium for chromium changes and README.trustbridge for our modifications.
author Andre Heinecke <andre.heinecke@intevation.de>
date Mon, 28 Jul 2014 10:47:06 +0200
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1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2 /* This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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5
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6 #include "prbit.h"
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7
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8 /*
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9 ** Compute the log of the least power of 2 greater than or equal to n
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10 */
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11 PR_IMPLEMENT(PRIntn) PR_CeilingLog2(PRUint32 n)
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12 {
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13 PRIntn log2;
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14 PR_CEILING_LOG2(log2, n);
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15 return log2;
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16 }
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17
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18 /*
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19 ** Compute the log of the greatest power of 2 less than or equal to n.
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20 ** This really just finds the highest set bit in the word.
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21 */
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22 PR_IMPLEMENT(PRIntn) PR_FloorLog2(PRUint32 n)
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23 {
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24 PRIntn log2;
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25 PR_FLOOR_LOG2(log2, n);
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26 return log2;
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27 }
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