Mega Code Archive
Fmt - format text (like Berkeley UNIX fmt)
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/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
/**
* Fmt - format text (like Berkeley UNIX fmt).
*/
public class Fmt {
/** The maximum column width */
public static final int COLWIDTH = 72;
/** The file that we read and format */
BufferedReader in;
/** If files present, format each, else format the standard input. */
public static void main(String[] av) throws IOException {
if (av.length == 0)
new Fmt(System.in).format();
else
for (int i = 0; i < av.length; i++)
new Fmt(av[i]).format();
}
/** Construct a Formatter given a filename */
public Fmt(String fname) throws IOException {
in = new BufferedReader(new FileReader(fname));
}
/** Construct a Formatter given an open Stream */
public Fmt(InputStream file) throws IOException {
in = new BufferedReader(new InputStreamReader(file));
}
/** Format the File contained in a constructed Fmt object */
public void format() throws IOException {
String w, f;
int col = 0;
while ((w = in.readLine()) != null) {
if (w.length() == 0) { // null line
System.out.print("\n"); // end current line
if (col > 0) {
System.out.print("\n"); // output blank line
col = 0;
}
continue;
}
// otherwise it's text, so format it.
StringTokenizer st = new StringTokenizer(w);
while (st.hasMoreTokens()) {
f = st.nextToken();
if (col + f.length() > COLWIDTH) {
System.out.print("\n");
col = 0;
}
System.out.print(f + " ");
col += f.length() + 1;
}
}
if (col > 0)
System.out.print("\n");
in.close();
}
}
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