/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE197_Numeric_Truncation_Error__int_File_to_short_31.java
Label Definition File: CWE197_Numeric_Truncation_Error__int.label.xml
Template File: sources-sink-31.tmpl.java
*/
/*
 * @description
 * CWE: 197 Numeric Truncation Error
 * BadSource: File Read data from file (named c:\data.txt)
 * GoodSource: A hardcoded non-zero, non-min, non-max, even number
 * Sinks: to_short
 *    BadSink : Convert data to a short
 * Flow Variant: 31 Data flow: make a copy of data within the same method
 *
 * */




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

import java.util.logging.Level;

public class CWE197_Numeric_Truncation_Error__int_File_to_short_31 extends AbstractTestCase
{
    /* uses badsource and badsink */
    public void bad() throws Throwable
    {
        int dataCopy;
        {
            int data;

            data = Integer.MIN_VALUE; /* Initialize data */

            {
                File file = new File("C:\\data.txt");
                FileInputStream streamFileInput = null;
                InputStreamReader readerInputStream = null;
                BufferedReader readerBuffered = null;

                try
                {
                    /* read string from file into data */
                    streamFileInput = new FileInputStream(file);
                    readerInputStream = new InputStreamReader(streamFileInput, "UTF-8");
                    readerBuffered = new BufferedReader(readerInputStream);

                    /* POTENTIAL FLAW: Read data from a file */
                    /* This will be reading the first "line" of the file, which
                     * could be very long if there are little or no newlines in the file */
                    String stringNumber = readerBuffered.readLine();
                    if (stringNumber != null) /* avoid NPD incidental warnings */
                    {
                        try
                        {
                            data = Integer.parseInt(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);
                    }

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

            dataCopy = data;
        }
        {
            int data = dataCopy;

            {
                /* POTENTIAL FLAW: Convert data to a short, possibly causing a truncation error */
                IO.writeLine((short)data);
            }

        }
    }

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

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

            /* FIX: Use a hardcoded number that won't cause underflow, overflow, divide by zero, or loss-of-precision issues */
            data = 2;

            dataCopy = data;
        }
        {
            int data = dataCopy;

            {
                /* POTENTIAL FLAW: Convert data to a short, possibly causing a truncation error */
                IO.writeLine((short)data);
            }

        }
    }

    /* 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);
    }
}
