BinaryDump.java
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/******************************************************************************
* Compilation: javac BinaryDump.java
* Execution: java BinaryDump N < file
* Dependencies: BinaryStdIn.java
* Data file: http://introcs.cs.princeton.edu/stdlib/abra.txt
*
* Reads in a binary file and writes out the bits, N per line.
*
* % more abra.txt
* ABRACADABRA!
*
* % java BinaryDump 16 < abra.txt
* 0100000101000010
* 0101001001000001
* 0100001101000001
* 0100010001000001
* 0100001001010010
* 0100000100100001
* 96 bits
*
******************************************************************************/
package edu.princeton.cs.algs4;
/**
* The {@code BinaryDump} class provides a client for displaying the contents
* of a binary file in binary.
* <p>
* For more full-featured versions, see the Unix utilities
* {@code od} (octal dump) and {@code hexdump} (hexadecimal dump).
* <p>
* For additional documentation,
* see <a href="http://algs4.cs.princeton.edu/55compress">Section 5.5</a> of
* <i>Algorithms, 4th Edition</i> by Robert Sedgewick and Kevin Wayne.
* <p>
* See also {@link HexDump} and {@link PictureDump}.
*
* @author Robert Sedgewick
* @author Kevin Wayne
*/
public class BinaryDump {
// Do not instantiate.
private BinaryDump() { }
/**
* Reads in a sequence of bytes from standard input and writes
* them to standard output in binary, k bits per line,
* where k is given as a command-line integer (defaults
* to 16 if no integer is specified); also writes the number
* of bits.
*
* @param args the command-line arguments
*/
public static void main(String[] args) {
int bitsPerLine = 16;
if (args.length == 1) {
bitsPerLine = Integer.parseInt(args[0]);
}
int count;
for (count = 0; !BinaryStdIn.isEmpty(); count++) {
if (bitsPerLine == 0) {
BinaryStdIn.readBoolean();
continue;
}
else if (count != 0 && count % bitsPerLine == 0) StdOut.println();
if (BinaryStdIn.readBoolean()) StdOut.print(1);
else StdOut.print(0);
}
if (bitsPerLine != 0) StdOut.println();
StdOut.println(count + " bits");
}
}
/******************************************************************************
* Copyright 2002-2016, Robert Sedgewick and Kevin Wayne.
*
* This file is part of algs4.jar, which accompanies the textbook
*
* Algorithms, 4th edition by Robert Sedgewick and Kevin Wayne,
* Addison-Wesley Professional, 2011, ISBN 0-321-57351-X.
* http://algs4.cs.princeton.edu
*
*
* algs4.jar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* algs4.jar is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with algs4.jar. If not, see http://www.gnu.org/licenses.
******************************************************************************/