www.pudn.com > lib.zip > scramble.h

#define GPC 18 
#define GPA 5 
 
typedef unsigned int uint; 
 
struct scrambler 
  { scrambler(int pb); 
    void reset(); 
    int fwd(int), rev(int); 
 
private: 
    int bit(int); 
    int tap; 
    uint wd; 
  }; 
 
inline scrambler::scrambler(int xt) 
  { tap = xt; 
    wd = 0; 
  } 
 
inline void scrambler::reset() 
  { wd = 0; 
  } 
 
inline int scrambler::bit(int bn) 
  { return (wd >> 23-bn) & 1; 
  }