bitvect.h

Think in C++文中代码实现

// File from page 188 in "Thinking in C++" by Bruce Eckel
//////////////////////////////////////////////////
// From the compressed package ECKELT02.ZIP 4/11/95
// (Original ECKELT01.ZIP dated 2/21/95)
// Copyright (c) Bruce Eckel, 1995 
// Source code file from the book "Thinking in C++", 
// Prentice Hall, 1995, ISBN: 0-13-917709-4
// All rights reserved EXCEPT as allowed by the following 
// statements: You may freely use this file for your own 
// work, including modifications and distribution in 
// executable form only. You may copy and distribute this 
// file, as long as it is only distributed in the complete 
// (compressed) package with the other files from this 
// book and you do not remove this copyright and notice. 
// You may not distribute modified versions of the source 
// code in this package. This package may be freely placed 
// on bulletin boards, internet nodes, shareware disks and 
// product vendor disks. You may not use this file in 
// printed media without the express permission of the 
// author. Bruce Eckel makes no 
// representation about the suitability of this software 
// for any purpose. It is provided "as is" without express 
// or implied warranty of any kind. The entire risk as to 
// the quality and performance of the software is with 
// you. Should the software prove defective, you assume 
// the cost of all necessary servicing, repair, or 
// correction. 
// If you think you've found an error, please 
// email all modified files with loudly commented changes 
// to: [e-mail] (please use the same 
// address for non-code errors found in the book).
//////////////////////////////////////////////////

//: BITVECT.H -- Bit Vector
#ifndef BITVECT_H_
#define BITVECT_H_

class BitVector {
  unsigned char* bytes;
  int Bits, numBytes;
public:
  BitVector(); // Default: 0 size
  // init points to an array of bytes
  // size is measured in bytes
  BitVector(unsigned char* init,
            int size = 8);
  // binary is a string of 1s and 0s
  BitVector(char* binary);
  ~BitVector();
  void set(int bit);
  void clear(int bit);
  int read(int bit);
  int bits(); // Number of bits in the vector
  void bits(int sz); // Set number of bits
  void print(const char* msg = "");
};
#endif // BITVECT_H_