hxbitset.h
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef _HXBITSET_H_
- #define _HXBITSET_H_
- /*
- * Freely adapted from the g++ BitSet library...
- */
- typedef UINT32 _BS_word;
- #define _BS_CHAR_BIT 8
- #define _BS_BITS_PER_WORD (_BS_CHAR_BIT*sizeof(_BS_word))
- #define _BS_WORDS_NEEDED(NBITS) ((NBITS+_BS_BITS_PER_WORD-1)/_BS_BITS_PER_WORD)
- /* number the bits in a _BS_word in little-endian order */
- #define _BS_BIGENDIAN 0
- #if _BS_BIGENDIAN
- #define _BS_LEFT >>
- #define _BS_RIGHT <<
- #else
- #define _BS_LEFT <<
- #define _BS_RIGHT >>
- #endif
- #if _BS_BIGENDIAN
- #define _BS_BITMASK(BITNO) ((_BS_word)1 << (_BS_BITS_PER_WORD - 1 - (BITNO)))
- #else
- #define _BS_BITMASK(BITNO) ((_BS_word)1 << (BITNO))
- #endif
- #define _BS_INDEX(I) ((unsigned)(I) / _BS_BITS_PER_WORD)
- #define _BS_POS(I) ((I) & (_BS_BITS_PER_WORD - 1))
- #define _BS_SHORT_LEN 8
- class CHXBitset
- {
- public:
- CHXBitset();
- CHXBitset(INT32 maxBit);
- CHXBitset(BYTE* pBitmap, INT32 nCount);
- ~CHXBitset();
- void set(INT32 pos);
- void set(INT32 from, INT32 to);
- void set(); // set all bits
- void clear(INT32 pos);
- void clear(INT32 from, INT32 to);
- void clear(); // clear all bits
- BOOL test(INT32 pos);
- INT32 toByteArray(BYTE** pBitmap);
- INT32 getSize();
- INT32 getNumBits();
- BOOL test(INT32 from, INT32 to);
- void growsize(INT32 maxBit);
- private:
- void setBitsetSize(INT32 nBitsetSize);
- _BS_word* m_pBitset;
- INT32 m_nBitsetSize;
- _BS_word m_pShortBitset[_BS_SHORT_LEN];
- };
- inline INT32
- CHXBitset::getSize()
- {
- // returns size of bitset in bytes
- return m_nBitsetSize * sizeof(_BS_word);
- }
- inline INT32
- CHXBitset::getNumBits()
- {
- return(m_nBitsetSize * _BS_BITS_PER_WORD);
- }
- #endif /* _HXBITSET_H_ */