52 lines
864 B
C
52 lines
864 B
C
/*
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* bits: platform indipendent version operating on chars
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* Copyright(c) 2001 by wave++ "Yuri D'Elia" <wavexx@users.sf.net>
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* Distributed under GNU GPL (v2 or above) WITHOUT ANY WARRANTY.
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*/
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#ifndef BITS_H
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#define BITS_H
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#include "config.h"
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/* a typedef for bits operation container */
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typedef long int _bits_type;
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/* core functions */
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static inline _bits_type
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getmask(const int pos)
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{
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_bits_type rtval = 1;
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return (rtval << pos);
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}
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static inline void
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onbit(_bits_type* obj, const int pos)
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{
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*obj |= getmask(pos);
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}
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static inline void
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offbit(_bits_type* obj, const int pos)
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{
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*obj &= ~getmask(pos);
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}
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static inline int
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getbit(const _bits_type* obj, const int pos)
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{
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_bits_type tmpobj = *obj;
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tmpobj &= getmask(pos);
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return (tmpobj? 1: 0);
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}
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static inline void
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invbit(_bits_type* obj, const int pos)
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{
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*obj ^= getmask(pos);
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}
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#endif
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