/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE197_Numeric_Truncation_Error__int_Environment_to_byte_17.java
Label Definition File: CWE197_Numeric_Truncation_Error__int.label.xml
Template File: sources-sink-17.tmpl.java
*/
/*
* @description
* CWE: 197 Numeric Truncation Error
* BadSource: Environment Read data from an environment variable
* GoodSource: A hardcoded non-zero, non-min, non-max, even number
* BadSink: to_byte Convert data to a byte
* Flow Variant: 17 Control flow: for loops
*
* */




import java.util.logging.Level;

public class CWE197_Numeric_Truncation_Error__int_Environment_to_byte_17 extends AbstractTestCase
{
    /* uses badsource and badsink */
    public void bad() throws Throwable
    {
        int data;

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

        /* get environment variable ADD */
        /* POTENTIAL FLAW: Read data from an environment variable */
        {
            String stringNumber = System.getenv("ADD");
            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);
                }
            }
        }

        for (int i = 0; i < 1; i++)
        {
            {
                /* POTENTIAL FLAW: Convert data to a byte, possibly causing a truncation error */
                IO.writeLine((byte)data);
            }
        }
    }

    /* goodG2B() - use goodsource and badsink by reversing the block outside the
     * for statement with the one in the for statement */
    private void goodG2B() throws Throwable
    {
        int data;

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

        for (int i = 0; i < 1; i++)
        {
            {
                /* POTENTIAL FLAW: Convert data to a byte, possibly causing a truncation error */
                IO.writeLine((byte)data);
            }
        }
    }

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

    /* 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);
    }
}
