这些函数操作“位”,经常用到:
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void SetN1(unsigned short *pBuf, int n)
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{
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(*pBuf) |= 1<<n;
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}
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void SetN0(unsigned short *pBuf, int n)
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{
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(*pBuf) &= ~(1<<n);
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}
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void SetN1(unsigned char *pBuf, int n)
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{
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(*pBuf) |= 1<<n;
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}
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void SetN0(unsigned char *pBuf, int n)
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{
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(*pBuf) &= ~(1<<n);
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}
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int Get1Bit(unsigned char buf, int n)
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{
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return (buf>>n) & 0x01;
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}
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int Get1Bit(unsigned short buf, int n)
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{
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return (buf>>n) & 0x01;
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}
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int Get2Bit(unsigned char buf, int n)
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{
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return (buf>>n) & 0x03;
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}
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int Get2Bit(unsigned short buf, int n)
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{
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return (buf>>n) & 0x03;
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}
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void Set2Bit(unsigned short *pBuf, int n, int m)
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{
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(*pBuf) |= m<<n;
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}
其实,最方便操纵“位”,如果不限制C语言的话,使用C++的STL中bitset最方便。
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