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authorAaron Spike <aaron@ekips.org>2006-04-12 13:20:54 +0000
committeracspike <acspike@users.sourceforge.net>2006-04-12 13:20:54 +0000
commitddfaffe08d23e4663fe759d67ae33fd67fc9ce5b (patch)
tree234f5425a7ef7058e69dc2ab77f89810e4f3ed91 /src/dom/js/jsbit.h
parentfix 1466070 (diff)
downloadinkscape-ddfaffe08d23e4663fe759d67ae33fd67fc9ce5b.tar.gz
inkscape-ddfaffe08d23e4663fe759d67ae33fd67fc9ce5b.zip
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(bzr r478)
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diff --git a/src/dom/js/jsbit.h b/src/dom/js/jsbit.h
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-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is Mozilla Communicator client code, released
- * March 31, 1998.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
-#ifndef jsbit_h___
-#define jsbit_h___
-
-#include "jstypes.h"
-JS_BEGIN_EXTERN_C
-
-/*
-** A jsbitmap_t is a long integer that can be used for bitmaps
-*/
-typedef JSUword jsbitmap_t; /* NSPR name, a la Unix system types */
-typedef jsbitmap_t jsbitmap; /* JS-style scalar typedef name */
-
-#define JS_TEST_BIT(_map,_bit) \
- ((_map)[(_bit)>>JS_BITS_PER_WORD_LOG2] & (1L << ((_bit) & (JS_BITS_PER_WORD-1))))
-#define JS_SET_BIT(_map,_bit) \
- ((_map)[(_bit)>>JS_BITS_PER_WORD_LOG2] |= (1L << ((_bit) & (JS_BITS_PER_WORD-1))))
-#define JS_CLEAR_BIT(_map,_bit) \
- ((_map)[(_bit)>>JS_BITS_PER_WORD_LOG2] &= ~(1L << ((_bit) & (JS_BITS_PER_WORD-1))))
-
-/*
-** Compute the log of the least power of 2 greater than or equal to n
-*/
-extern JS_PUBLIC_API(JSIntn) JS_CeilingLog2(JSUint32 i);
-
-/*
-** Compute the log of the greatest power of 2 less than or equal to n
-*/
-extern JS_PUBLIC_API(JSIntn) JS_FloorLog2(JSUint32 i);
-
-/*
-** Macro version of JS_CeilingLog2: Compute the log of the least power of
-** 2 greater than or equal to _n. The result is returned in _log2.
-*/
-#define JS_CEILING_LOG2(_log2,_n) \
- JS_BEGIN_MACRO \
- JSUint32 j_ = (JSUint32)(_n); \
- (_log2) = 0; \
- if ((j_) & ((j_)-1)) \
- (_log2) += 1; \
- if ((j_) >> 16) \
- (_log2) += 16, (j_) >>= 16; \
- if ((j_) >> 8) \
- (_log2) += 8, (j_) >>= 8; \
- if ((j_) >> 4) \
- (_log2) += 4, (j_) >>= 4; \
- if ((j_) >> 2) \
- (_log2) += 2, (j_) >>= 2; \
- if ((j_) >> 1) \
- (_log2) += 1; \
- JS_END_MACRO
-
-/*
-** Macro version of JS_FloorLog2: Compute the log of the greatest power of
-** 2 less than or equal to _n. The result is returned in _log2.
-**
-** This is equivalent to finding the highest set bit in the word.
-*/
-#define JS_FLOOR_LOG2(_log2,_n) \
- JS_BEGIN_MACRO \
- JSUint32 j_ = (JSUint32)(_n); \
- (_log2) = 0; \
- if ((j_) >> 16) \
- (_log2) += 16, (j_) >>= 16; \
- if ((j_) >> 8) \
- (_log2) += 8, (j_) >>= 8; \
- if ((j_) >> 4) \
- (_log2) += 4, (j_) >>= 4; \
- if ((j_) >> 2) \
- (_log2) += 2, (j_) >>= 2; \
- if ((j_) >> 1) \
- (_log2) += 1; \
- JS_END_MACRO
-
-JS_END_EXTERN_C
-#endif /* jsbit_h___ */