/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE369_Divide_by_Zero__float_console_readLine_divide_45.java
Label Definition File: CWE369_Divide_by_Zero__float.label.xml
Template File: sources-sinks-45.tmpl.java
*/
/*
 * @description
 * CWE: 369 Divide by zero
 * BadSource: console_readLine Read data from the console using readLine
 * GoodSource: A hardcoded non-zero number (two)
 * Sinks: divide
 *    GoodSink: Check for zero before dividing
 *    BadSink : Dividing by a value that may be zero
 * Flow Variant: 45 Data flow: data passed as a private class member variable from one function to another in the same class
 *
 * */




import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

import java.util.logging.Level;

public class CWE369_Divide_by_Zero__float_console_readLine_divide_45 extends AbstractTestCase
{
    private float dataBad;
    private float dataGoodG2B;
    private float dataGoodB2G;

    private void badSink() throws Throwable
    {
        float data = dataBad;

        /* POTENTIAL FLAW: Possibly divide by zero */
        int result = (int)(100.0 / data);
        IO.writeLine(result);

    }

    public void bad() throws Throwable
    {
        float data;

        data = -1.0f; /* Initialize data */

        InputStreamReader readerInputStream = null;
        BufferedReader readerBuffered = null;

        /* read user input from console with readLine */
        try
        {
            readerInputStream = new InputStreamReader(System.in, "UTF-8");
            readerBuffered = new BufferedReader(readerInputStream);

            /* POTENTIAL FLAW: Read data from the console using readLine */
            String stringNumber = readerBuffered.readLine();

            if (stringNumber != null) // avoid NPD incidental warnings
            {
                try
                {
                    data = Float.parseFloat(stringNumber.trim());
                }
                catch (NumberFormatException exceptNumberFormat)
                {
                    IO.logger.log(Level.WARNING, "Number format exception parsing data from string", exceptNumberFormat);
                }
            }
        }
        catch (IOException exceptIO)
        {
            IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO);
        }
        finally
        {
            /* Close stream reading objects */
            try
            {
                if (readerBuffered != null)
                {
                    readerBuffered.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO);
            }

            try
            {
                if (readerInputStream != null)
                {
                    readerInputStream.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO);
            }
        }

        dataBad = data;
        badSink();
    }

    public void good() throws Throwable
    {
        goodG2B();
        goodB2G();
    }

    private void goodG2BSink() throws Throwable
    {
        float data = dataGoodG2B;

        /* POTENTIAL FLAW: Possibly divide by zero */
        int result = (int)(100.0 / data);
        IO.writeLine(result);

    }

    /* goodG2B() - use goodsource and badsink */
    private void goodG2B() throws Throwable
    {
        float data;

        /* FIX: Use a hardcoded number that won't a divide by zero */
        data = 2.0f;

        dataGoodG2B = data;
        goodG2BSink();
    }

    private void goodB2GSink() throws Throwable
    {
        float data = dataGoodB2G;

        /* FIX: Check for value of or near zero before dividing */
        if (Math.abs(data) > 0.000001)
        {
            int result = (int)(100.0 / data);
            IO.writeLine(result);
        }
        else
        {
            IO.writeLine("This would result in a divide by zero");
        }

    }

    /* goodB2G() - use badsource and goodsink */
    private void goodB2G() throws Throwable
    {
        float data;

        data = -1.0f; /* Initialize data */

        InputStreamReader readerInputStream = null;
        BufferedReader readerBuffered = null;

        /* read user input from console with readLine */
        try
        {
            readerInputStream = new InputStreamReader(System.in, "UTF-8");
            readerBuffered = new BufferedReader(readerInputStream);

            /* POTENTIAL FLAW: Read data from the console using readLine */
            String stringNumber = readerBuffered.readLine();

            if (stringNumber != null) // avoid NPD incidental warnings
            {
                try
                {
                    data = Float.parseFloat(stringNumber.trim());
                }
                catch (NumberFormatException exceptNumberFormat)
                {
                    IO.logger.log(Level.WARNING, "Number format exception parsing data from string", exceptNumberFormat);
                }
            }
        }
        catch (IOException exceptIO)
        {
            IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO);
        }
        finally
        {
            /* Close stream reading objects */
            try
            {
                if (readerBuffered != null)
                {
                    readerBuffered.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO);
            }

            try
            {
                if (readerInputStream != null)
                {
                    readerInputStream.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO);
            }
        }

        dataGoodB2G = data;
        goodB2GSink();
    }

    /* Below is the main(). It is only used when building this testcase on
     * its own for testing or for building a binary to use in testing binary
     * analysis tools. It is not used when compiling all the testcases as one
     * application, which is how source code analysis tools are tested.
     */
    public static void main(String[] args) throws ClassNotFoundException,
           InstantiationException, IllegalAccessException
    {
        mainFromParent(args);
    }
}
