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// (jEdit options) :folding=explicit:collapseFolds=1:
//{{{ Package, imports
//import java.awt.*;
//import java.awt.event.*;
import java.io.*;
import java.net.URL;
import java.text.DecimalFormat;
import java.util.*;
//import java.util.regex.*;
//import javax.swing.*;
//import driftwood.*;
//}}}
/**
* <code>ZoomTest</code> has not yet been documented.
*
* <p>Copyright (C) 2003 by Ian W. Davis. All rights reserved.
* <br>Begun on Wed Oct 29 08:17:41 EST 2003
*/
public class ZoomTest //extends ... implements ...
{
//{{{ Constants
//}}}
//{{{ Variable definitions
//##############################################################################
//}}}
//{{{ Constructor(s)
//##############################################################################
public ZoomTest()
{
super();
}
//}}}
//{{{ empty_code_segment
//##############################################################################
//}}}
//{{{ Main, main
//##############################################################################
/**
* Main() function for running as an application
*/
public void Main()
{
final double LOG_2 = Math.log(2.0);
final double SPAN = Math.PI * 100.0;
for(int i = -200; i <= 200; i++)
{
float v = (float)( SPAN / Math.pow(2.0, i/16.0) );
int j = (int)Math.round(16.0 * Math.log(SPAN / v) / LOG_2);
if(i != j)
System.err.println("Failed for "+i+" != "+j);
}
}
public static void main(String[] args)
{
ZoomTest mainprog = new ZoomTest();
try
{
mainprog.parseArguments(args);
mainprog.Main();
}
catch(IllegalArgumentException ex)
{
ex.printStackTrace();
System.err.println();
mainprog.showHelp(true);
System.err.println();
System.err.println("*** Error parsing arguments: "+ex.getMessage());
System.exit(1);
}
}
//}}}
//{{{ parseArguments, showHelp
//##############################################################################
/**
* Parse the command-line options for this program.
* @param args the command-line options, as received by main()
* @throws IllegalArgumentException if any argument is unrecognized, ambiguous, missing
* a required parameter, has a malformed parameter, or is otherwise unacceptable.
*/
void parseArguments(String[] args)
{
String arg, flag, param;
boolean interpFlags = true;
for(int i = 0; i < args.length; i++)
{
arg = args[i];
if(!arg.startsWith("-") || !interpFlags || arg.equals("-"))
{
// This is probably a filename or something
interpretArg(arg);
}
else if(arg.equals("--"))
{
// Stop treating things as flags once we find --
interpFlags = false;
}
else
{
// This is a flag. It may have a param after the = sign
int eq = arg.indexOf('=');
if(eq != -1)
{
flag = arg.substring(0, eq);
param = arg.substring(eq+1);
}
else
{
flag = arg;
param = null;
}
try { interpretFlag(flag, param); }
catch(NullPointerException ex)
{ throw new IllegalArgumentException("'"+arg
+"' expects to be followed by a parameter"); }
}
}//for(each arg in args)
}
// Display help information
void showHelp(boolean showAll)
{
if(showAll)
{
InputStream is = getClass().getResourceAsStream("ZoomTest.help");
if(is == null)
System.err.println("\n*** Unable to locate help information in 'ZoomTest.help' ***\n");
else
{
try { streamcopy(is, System.out); }
catch(IOException ex) { ex.printStackTrace(); }
}
}
System.err.println(".ZoomTest");
System.err.println("Copyright (C) 2003 by Ian W. Davis. All rights reserved.");
}
// Copies src to dst until we hit EOF
void streamcopy(InputStream src, OutputStream dst) throws IOException
{
byte[] buffer = new byte[2048];
int len;
while((len = src.read(buffer)) != -1) dst.write(buffer, 0, len);
}
//}}}
//{{{ interpretArg, interpretFlag
//##############################################################################
void interpretArg(String arg)
{
// Handle files, etc. here
}
void interpretFlag(String flag, String param)
{
if(flag.equals("-help") || flag.equals("-h"))
{
showHelp(true);
System.exit(0);
}
else if(flag.equals("-dummy_option"))
{
// handle option here
}
else throw new IllegalArgumentException("'"+flag+"' is not recognized as a valid flag");
}
//}}}
}//class
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