package com.devdaily.apps.unix2dos;
import java.io.*;
/**
* Convert a Unix file to a DOS file, i.e., convert \r\n to \r only.
*/
public class Unix2Dos
{
private File unixFile;
private File dosFile;
public static void main (String[] args)
{
Unix2Dos u2d = new Unix2Dos(args);
}
public Unix2Dos(String[] args)
{
getProperArgCountOrExit(args);
createUnixFileOrExit(args[0]);
//openDosFileOrExit(args[1]);
// read from the unix file, write to the dos file
}
private void getProperArgCountOrExit(String[] args)
{
if ( args.length != 2 )
{
displayUsageStatement();
System.exit(1);
}
}
private void createUnixFileOrExit(String fileName)
{
unixFile = new File(fileName);
if (! unixFile.exists() )
{
System.err.println( "\nCannot find Unix file, " + fileName );
displayUsageStatement();
System.exit(2);
}
if (! unixFile.isFile() )
{
System.err.println( "\n" + fileName + " is not a file, quitting.");
displayUsageStatement();
System.exit(4);
}
if (! unixFile.canRead() )
{
System.err.println( "\nCannot read Unix file, " + fileName );
displayUsageStatement();
System.exit(3);
}
}
private void openDosFileOrExit(String fileName)
{
dosFile = new File(fileName);
try
{
if (! dosFile.createNewFile() )
{
System.err.println( "\nCould not create the DOS file, " + fileName );
System.exit(5);
}
}
catch (IOException ioe)
{
System.err.println( "\nThrew an IOException trying to create the file " + fileName + ", message follows." );
System.err.println( ioe.getMessage() );
System.exit(5);
}
}
private void displayUsageStatement()
{
System.err.println( "\nUsage: java com.devdaily.apps.unix2dos.Unix2Dos unixfile dosfile" );
}
}
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